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4da624ddb3
R_MIPS_32 and R_MIPS_REL32. Set sgot and g as soon as possible. (mips_elf_size_dynamic_sections): Don't require .got to exist. (mips_elf_finish_dynamic_sections): Likewise.
6402 lines
182 KiB
C
6402 lines
182 KiB
C
/* MIPS-specific support for 32-bit ELF
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Copyright 1993, 1994, 1995, 1996 Free Software Foundation, Inc.
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Most of the information added by Ian Lance Taylor, Cygnus Support,
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<ian@cygnus.com>.
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This file is part of BFD, the Binary File Descriptor library.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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/* This file handles MIPS ELF targets. SGI Irix 5 uses a slightly
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different MIPS ELF from other targets. This matters when linking.
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This file supports both, switching at runtime. */
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#include "bfd.h"
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#include "sysdep.h"
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#include "libbfd.h"
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#include "bfdlink.h"
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#include "genlink.h"
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#include "elf-bfd.h"
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#include "elf/mips.h"
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/* Get the ECOFF swapping routines. */
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#include "coff/sym.h"
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#include "coff/symconst.h"
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#include "coff/internal.h"
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#include "coff/ecoff.h"
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#include "coff/mips.h"
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#define ECOFF_32
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#include "ecoffswap.h"
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static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup
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PARAMS ((bfd *, bfd_reloc_code_real_type));
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static void mips_info_to_howto_rel
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PARAMS ((bfd *, arelent *, Elf32_Internal_Rel *));
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static void bfd_mips_elf32_swap_gptab_in
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PARAMS ((bfd *, const Elf32_External_gptab *, Elf32_gptab *));
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static void bfd_mips_elf32_swap_gptab_out
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PARAMS ((bfd *, const Elf32_gptab *, Elf32_External_gptab *));
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static boolean mips_elf_sym_is_global PARAMS ((bfd *, asymbol *));
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static boolean mips_elf32_object_p PARAMS ((bfd *));
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static boolean mips_elf_create_procedure_table
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PARAMS ((PTR, bfd *, struct bfd_link_info *, asection *,
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struct ecoff_debug_info *));
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static int mips_elf_additional_program_headers PARAMS ((bfd *));
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static boolean mips_elf_modify_segment_map PARAMS ((bfd *));
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static boolean mips_elf32_section_from_shdr
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PARAMS ((bfd *, Elf32_Internal_Shdr *, char *));
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static boolean mips_elf32_section_processing
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PARAMS ((bfd *, Elf32_Internal_Shdr *));
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static boolean mips_elf_is_local_label
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PARAMS ((bfd *, asymbol *));
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static struct bfd_hash_entry *mips_elf_link_hash_newfunc
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PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
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static struct bfd_link_hash_table *mips_elf_link_hash_table_create
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PARAMS ((bfd *));
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static int gptab_compare PARAMS ((const void *, const void *));
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static boolean mips_elf_final_link
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PARAMS ((bfd *, struct bfd_link_info *));
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static void mips_elf_relocate_hi16
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PARAMS ((bfd *, Elf_Internal_Rela *, Elf_Internal_Rela *, bfd_byte *,
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bfd_vma));
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static void mips_elf_relocate_got_local
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PARAMS ((bfd *, bfd *, asection *, Elf_Internal_Rela *,
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Elf_Internal_Rela *, bfd_byte *, bfd_vma));
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static void mips_elf_relocate_global_got
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PARAMS ((bfd *, Elf_Internal_Rela *, bfd_byte *, bfd_vma));
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static boolean mips_elf_adjust_dynindx
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PARAMS ((struct elf_link_hash_entry *, PTR));
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static boolean mips_elf_relocate_section
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PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
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Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
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static boolean mips_elf_create_dynamic_sections
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PARAMS ((bfd *, struct bfd_link_info *));
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static boolean mips_elf_create_compact_rel_section
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PARAMS ((bfd *, struct bfd_link_info *));
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static boolean mips_elf_create_got_section
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PARAMS ((bfd *, struct bfd_link_info *));
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static boolean mips_elf_check_relocs
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PARAMS ((bfd *, struct bfd_link_info *, asection *,
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const Elf_Internal_Rela *));
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static boolean mips_elf_adjust_dynamic_symbol
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PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
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static boolean mips_elf_size_dynamic_sections
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PARAMS ((bfd *, struct bfd_link_info *));
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static boolean mips_elf_finish_dynamic_symbol
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PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
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Elf_Internal_Sym *));
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static boolean mips_elf_finish_dynamic_sections
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PARAMS ((bfd *, struct bfd_link_info *));
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static boolean mips_elf_add_symbol_hook
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PARAMS ((bfd *, struct bfd_link_info *, const Elf_Internal_Sym *,
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const char **, flagword *, asection **, bfd_vma *));
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static bfd_reloc_status_type mips_elf_final_gp
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PARAMS ((bfd *, asymbol *, boolean, char **, bfd_vma *));
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static bfd_byte *elf32_mips_get_relocated_section_contents
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PARAMS ((bfd *, struct bfd_link_info *, struct bfd_link_order *,
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bfd_byte *, boolean, asymbol **));
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/* This is true for Irix 5 executables, false for normal MIPS ELF ABI
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executables. FIXME: At the moment, we default to always generating
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Irix 5 executables. */
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#define SGI_COMPAT(abfd) (1)
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/* This structure is used to hold .got information when linking. It
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is stored in the tdata field of the bfd_elf_section_data structure. */
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struct mips_got_info
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{
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/* The symbol index of the first global .got symbol. */
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unsigned long global_gotsym;
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/* The number of local .got entries. */
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unsigned int local_gotno;
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};
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/* The number of local .got entries we reserve. */
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#define MIPS_RESERVED_GOTNO (2)
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/* Instructions which appear in a stub. For some reason the stub is
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slightly different on an SGI system. */
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#define ELF_MIPS_GP_OFFSET(abfd) (SGI_COMPAT (abfd) ? 0x7ff0 : 0x8000)
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#define STUB_LW(abfd) \
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(SGI_COMPAT (abfd) \
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? 0x8f998010 /* lw t9,0x8010(gp) */ \
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: 0x8f998000) /* lw t9,0x8000(gp) */
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#define STUB_MOVE 0x03e07825 /* move t7,ra */
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#define STUB_JALR 0x0320f809 /* jal t9 */
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#define STUB_LI16 0x34180000 /* ori t8,zero,0 */
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#define MIPS_FUNCTION_STUB_SIZE (16)
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/* Names of sections which appear in the .dynsym section in an Irix 5
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executable. */
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static const char * const mips_elf_dynsym_sec_names[] =
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{
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".text",
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".init",
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".fini",
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".data",
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".rodata",
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".sdata",
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".sbss",
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".bss",
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NULL
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};
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#define SIZEOF_MIPS_DYNSYM_SECNAMES \
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(sizeof mips_elf_dynsym_sec_names / sizeof mips_elf_dynsym_sec_names[0])
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/* The number of entries in mips_elf_dynsym_sec_names which go in the
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text segment. */
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#define MIPS_TEXT_DYNSYM_SECNO (3)
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/* The names of the runtime procedure table symbols used on Irix 5. */
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static const char * const mips_elf_dynsym_rtproc_names[] =
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{
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"_procedure_table",
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"_procedure_string_table",
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"_procedure_table_size",
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NULL
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};
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/* These structures are used to generate the .compact_rel section on
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Irix 5. */
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typedef struct
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{
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unsigned long id1; /* Always one? */
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unsigned long num; /* Number of compact relocation entries. */
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unsigned long id2; /* Always two? */
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unsigned long offset; /* The file offset of the first relocation. */
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unsigned long reserved0; /* Zero? */
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unsigned long reserved1; /* Zero? */
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} Elf32_compact_rel;
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typedef struct
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{
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bfd_byte id1[4];
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bfd_byte num[4];
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bfd_byte id2[4];
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bfd_byte offset[4];
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bfd_byte reserved0[4];
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bfd_byte reserved1[4];
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} Elf32_External_compact_rel;
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typedef struct
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{
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unsigned int ctype : 1; /* 1: long 0: short format. See below. */
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unsigned int rtype : 4; /* Relocation types. See below. */
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unsigned int dist2to : 8;
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unsigned int relvaddr : 19; /* (VADDR - vaddr of the previous entry)/ 4 */
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unsigned long konst; /* KONST field. See below. */
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unsigned long vaddr; /* VADDR to be relocated. */
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} Elf32_crinfo;
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typedef struct
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{
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unsigned int ctype : 1; /* 1: long 0: short format. See below. */
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unsigned int rtype : 4; /* Relocation types. See below. */
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unsigned int dist2to : 8;
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unsigned int relvaddr : 19; /* (VADDR - vaddr of the previous entry)/ 4 */
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unsigned long konst; /* KONST field. See below. */
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} Elf32_crinfo2;
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typedef struct
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{
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bfd_byte info[4];
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bfd_byte konst[4];
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bfd_byte vaddr[4];
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} Elf32_External_crinfo;
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typedef struct
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{
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bfd_byte info[4];
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bfd_byte konst[4];
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} Elf32_External_crinfo2;
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/* These are the constants used to swap the bitfields in a crinfo. */
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#define CRINFO_CTYPE (0x1)
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#define CRINFO_CTYPE_SH (31)
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#define CRINFO_RTYPE (0xf)
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#define CRINFO_RTYPE_SH (27)
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#define CRINFO_DIST2TO (0xff)
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#define CRINFO_DIST2TO_SH (19)
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#define CRINFO_RELVADDR (0x7ffff)
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#define CRINFO_RELVADDR_SH (0)
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/* A compact relocation info has long (3 words) or short (2 words)
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formats. A short format doesn't have VADDR field and relvaddr
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fields contains ((VADDR - vaddr of the previous entry) >> 2). */
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#define CRF_MIPS_LONG 1
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#define CRF_MIPS_SHORT 0
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/* There are 4 types of compact relocation at least. The value KONST
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has different meaning for each type:
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(type) (konst)
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CT_MIPS_REL32 Address in data
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CT_MIPS_WORD Address in word (XXX)
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CT_MIPS_GPHI_LO GP - vaddr
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CT_MIPS_JMPAD Address to jump
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*/
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#define CRT_MIPS_REL32 0xa
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#define CRT_MIPS_WORD 0xb
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#define CRT_MIPS_GPHI_LO 0xc
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#define CRT_MIPS_JMPAD 0xd
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#define mips_elf_set_cr_format(x,format) ((x).ctype = (format))
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#define mips_elf_set_cr_type(x,type) ((x).rtype = (type))
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#define mips_elf_set_cr_dist2to(x,v) ((x).dist2to = (v))
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#define mips_elf_set_cr_relvaddr(x,d) ((x).relvaddr = (d)<<2)
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static void bfd_elf32_swap_compact_rel_out
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PARAMS ((bfd *, const Elf32_compact_rel *, Elf32_External_compact_rel *));
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static void bfd_elf32_swap_crinfo_out
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PARAMS ((bfd *, const Elf32_crinfo *, Elf32_External_crinfo *));
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#define USE_REL 1 /* MIPS uses REL relocations instead of RELA */
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enum reloc_type
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{
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R_MIPS_NONE = 0,
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R_MIPS_16, R_MIPS_32,
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R_MIPS_REL32, R_MIPS_26,
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R_MIPS_HI16, R_MIPS_LO16,
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R_MIPS_GPREL16, R_MIPS_LITERAL,
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R_MIPS_GOT16, R_MIPS_PC16,
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R_MIPS_CALL16, R_MIPS_GPREL32,
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/* The remaining relocs are defined on Irix, although they are not
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in the MIPS ELF ABI. */
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R_MIPS_UNUSED1, R_MIPS_UNUSED2,
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R_MIPS_UNUSED3,
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R_MIPS_SHIFT5, R_MIPS_SHIFT6,
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R_MIPS_64, R_MIPS_GOT_DISP,
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R_MIPS_GOT_PAGE, R_MIPS_GOT_OFST,
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R_MIPS_GOT_HI16, R_MIPS_GOT_LO16,
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R_MIPS_SUB, R_MIPS_INSERT_A,
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R_MIPS_INSERT_B, R_MIPS_DELETE,
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R_MIPS_HIGHER, R_MIPS_HIGHEST,
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R_MIPS_CALL_HI16, R_MIPS_CALL_LO16,
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R_MIPS_max
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};
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static reloc_howto_type elf_mips_howto_table[] =
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{
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/* No relocation. */
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HOWTO (R_MIPS_NONE, /* type */
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0, /* rightshift */
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0, /* size (0 = byte, 1 = short, 2 = long) */
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0, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_MIPS_NONE", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0, /* dst_mask */
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false), /* pcrel_offset */
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/* 16 bit relocation. */
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HOWTO (R_MIPS_16, /* type */
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0, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_MIPS_16", /* name */
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true, /* partial_inplace */
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0xffff, /* src_mask */
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0xffff, /* dst_mask */
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false), /* pcrel_offset */
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/* 32 bit relocation. */
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HOWTO (R_MIPS_32, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_MIPS_32", /* name */
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true, /* partial_inplace */
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0xffffffff, /* src_mask */
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0xffffffff, /* dst_mask */
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false), /* pcrel_offset */
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/* 32 bit symbol relative relocation. */
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HOWTO (R_MIPS_REL32, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_MIPS_REL32", /* name */
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true, /* partial_inplace */
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0xffffffff, /* src_mask */
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0xffffffff, /* dst_mask */
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false), /* pcrel_offset */
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/* 26 bit branch address. */
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HOWTO (R_MIPS_26, /* type */
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2, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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26, /* bitsize */
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||
false, /* pc_relative */
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||
0, /* bitpos */
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||
complain_overflow_dont, /* complain_on_overflow */
|
||
/* This needs complex overflow
|
||
detection, because the upper four
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bits must match the PC. */
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bfd_elf_generic_reloc, /* special_function */
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||
"R_MIPS_26", /* name */
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||
true, /* partial_inplace */
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0x3ffffff, /* src_mask */
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0x3ffffff, /* dst_mask */
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false), /* pcrel_offset */
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||
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||
/* High 16 bits of symbol value. */
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||
HOWTO (R_MIPS_HI16, /* type */
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||
0, /* rightshift */
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||
2, /* size (0 = byte, 1 = short, 2 = long) */
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||
16, /* bitsize */
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||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
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||
_bfd_mips_elf_hi16_reloc, /* special_function */
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||
"R_MIPS_HI16", /* name */
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||
true, /* partial_inplace */
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||
0xffff, /* src_mask */
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||
0xffff, /* dst_mask */
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||
false), /* pcrel_offset */
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||
|
||
/* Low 16 bits of symbol value. */
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||
HOWTO (R_MIPS_LO16, /* type */
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||
0, /* rightshift */
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||
2, /* size (0 = byte, 1 = short, 2 = long) */
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||
16, /* bitsize */
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||
false, /* pc_relative */
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||
0, /* bitpos */
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||
complain_overflow_dont, /* complain_on_overflow */
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||
_bfd_mips_elf_lo16_reloc, /* special_function */
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||
"R_MIPS_LO16", /* name */
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||
true, /* partial_inplace */
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||
0xffff, /* src_mask */
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||
0xffff, /* dst_mask */
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||
false), /* pcrel_offset */
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||
|
||
/* GP relative reference. */
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||
HOWTO (R_MIPS_GPREL16, /* type */
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||
0, /* rightshift */
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||
2, /* size (0 = byte, 1 = short, 2 = long) */
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||
16, /* bitsize */
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||
false, /* pc_relative */
|
||
0, /* bitpos */
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||
complain_overflow_signed, /* complain_on_overflow */
|
||
_bfd_mips_elf_gprel16_reloc, /* special_function */
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||
"R_MIPS_GPREL16", /* name */
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||
true, /* partial_inplace */
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0xffff, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Reference to literal section. */
|
||
HOWTO (R_MIPS_LITERAL, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_signed, /* complain_on_overflow */
|
||
_bfd_mips_elf_gprel16_reloc, /* special_function */
|
||
"R_MIPS_LITERAL", /* name */
|
||
true, /* partial_inplace */
|
||
0xffff, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Reference to global offset table. */
|
||
HOWTO (R_MIPS_GOT16, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_signed, /* complain_on_overflow */
|
||
_bfd_mips_elf_got16_reloc, /* special_function */
|
||
"R_MIPS_GOT16", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* 16 bit PC relative reference. */
|
||
HOWTO (R_MIPS_PC16, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
true, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_signed, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_MIPS_PC16", /* name */
|
||
true, /* partial_inplace */
|
||
0xffff, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* 16 bit call through global offset table. */
|
||
/* FIXME: This is not handled correctly. */
|
||
HOWTO (R_MIPS_CALL16, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_signed, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_MIPS_CALL16", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* 32 bit GP relative reference. */
|
||
HOWTO (R_MIPS_GPREL32, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
32, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
_bfd_mips_elf_gprel32_reloc, /* special_function */
|
||
"R_MIPS_GPREL32", /* name */
|
||
true, /* partial_inplace */
|
||
0xffffffff, /* src_mask */
|
||
0xffffffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* The remaining relocs are defined on Irix 5, although they are
|
||
not defined by the ABI. */
|
||
{ 13 },
|
||
{ 14 },
|
||
{ 15 },
|
||
|
||
/* A 5 bit shift field. */
|
||
HOWTO (R_MIPS_SHIFT5, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
5, /* bitsize */
|
||
false, /* pc_relative */
|
||
6, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_MIPS_SHIFT5", /* name */
|
||
true, /* partial_inplace */
|
||
0x000007c0, /* src_mask */
|
||
0x000007c0, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* A 6 bit shift field. */
|
||
/* FIXME: This is not handled correctly; a special function is
|
||
needed to put the most significant bit in the right place. */
|
||
HOWTO (R_MIPS_SHIFT6, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
6, /* bitsize */
|
||
false, /* pc_relative */
|
||
6, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_MIPS_SHIFT6", /* name */
|
||
true, /* partial_inplace */
|
||
0x000007c4, /* src_mask */
|
||
0x000007c4, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* A 64 bit relocation. Presumably not used in 32 bit ELF. */
|
||
{ R_MIPS_64 },
|
||
|
||
/* Displacement in the global offset table. */
|
||
/* FIXME: Not handled correctly. */
|
||
HOWTO (R_MIPS_GOT_DISP, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_MIPS_GOT_DISP", /* name */
|
||
true, /* partial_inplace */
|
||
0x0000ffff, /* src_mask */
|
||
0x0000ffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Displacement to page pointer in the global offset table. */
|
||
/* FIXME: Not handled correctly. */
|
||
HOWTO (R_MIPS_GOT_PAGE, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_MIPS_GOT_PAGE", /* name */
|
||
true, /* partial_inplace */
|
||
0x0000ffff, /* src_mask */
|
||
0x0000ffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Offset from page pointer in the global offset table. */
|
||
/* FIXME: Not handled correctly. */
|
||
HOWTO (R_MIPS_GOT_OFST, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_MIPS_GOT_OFST", /* name */
|
||
true, /* partial_inplace */
|
||
0x0000ffff, /* src_mask */
|
||
0x0000ffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* High 16 bits of displacement in global offset table. */
|
||
/* FIXME: Not handled correctly. */
|
||
HOWTO (R_MIPS_GOT_HI16, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_MIPS_GOT_HI16", /* name */
|
||
true, /* partial_inplace */
|
||
0x0000ffff, /* src_mask */
|
||
0x0000ffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Low 16 bits of displacement in global offset table. */
|
||
/* FIXME: Not handled correctly. */
|
||
HOWTO (R_MIPS_GOT_LO16, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_MIPS_GOT_LO16", /* name */
|
||
true, /* partial_inplace */
|
||
0x0000ffff, /* src_mask */
|
||
0x0000ffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* 64 bit subtraction. Presumably not used in 32 bit ELF. */
|
||
{ R_MIPS_SUB },
|
||
|
||
/* Used to cause the linker to insert and delete instructions? */
|
||
{ R_MIPS_INSERT_A },
|
||
{ R_MIPS_INSERT_B },
|
||
{ R_MIPS_DELETE },
|
||
|
||
/* Get the higher values of a 64 bit addend. Presumably not used in
|
||
32 bit ELF. */
|
||
{ R_MIPS_HIGHER },
|
||
{ R_MIPS_HIGHEST },
|
||
|
||
/* High 16 bits of displacement in global offset table. */
|
||
/* FIXME: Not handled correctly. */
|
||
HOWTO (R_MIPS_CALL_HI16, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_MIPS_CALL_HI16", /* name */
|
||
true, /* partial_inplace */
|
||
0x0000ffff, /* src_mask */
|
||
0x0000ffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Low 16 bits of displacement in global offset table. */
|
||
/* FIXME: Not handled correctly. */
|
||
HOWTO (R_MIPS_CALL_LO16, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_MIPS_CALL_LO16", /* name */
|
||
true, /* partial_inplace */
|
||
0x0000ffff, /* src_mask */
|
||
0x0000ffff, /* dst_mask */
|
||
false) /* pcrel_offset */
|
||
};
|
||
|
||
/* Do a R_MIPS_HI16 relocation. This has to be done in combination
|
||
with a R_MIPS_LO16 reloc, because there is a carry from the LO16 to
|
||
the HI16. Here we just save the information we need; we do the
|
||
actual relocation when we see the LO16. MIPS ELF requires that the
|
||
LO16 immediately follow the HI16. As a GNU extension, we permit an
|
||
arbitrary number of HI16 relocs to be associated with a single LO16
|
||
reloc. This extension permits gcc to output the HI and LO relocs
|
||
itself. */
|
||
|
||
struct mips_hi16
|
||
{
|
||
struct mips_hi16 *next;
|
||
bfd_byte *addr;
|
||
bfd_vma addend;
|
||
};
|
||
|
||
/* FIXME: This should not be a static variable. */
|
||
|
||
static struct mips_hi16 *mips_hi16_list;
|
||
|
||
bfd_reloc_status_type
|
||
_bfd_mips_elf_hi16_reloc (abfd,
|
||
reloc_entry,
|
||
symbol,
|
||
data,
|
||
input_section,
|
||
output_bfd,
|
||
error_message)
|
||
bfd *abfd;
|
||
arelent *reloc_entry;
|
||
asymbol *symbol;
|
||
PTR data;
|
||
asection *input_section;
|
||
bfd *output_bfd;
|
||
char **error_message;
|
||
{
|
||
bfd_reloc_status_type ret;
|
||
bfd_vma relocation;
|
||
struct mips_hi16 *n;
|
||
|
||
/* If we're relocating, and this an external symbol, we don't want
|
||
to change anything. */
|
||
if (output_bfd != (bfd *) NULL
|
||
&& (symbol->flags & BSF_SECTION_SYM) == 0
|
||
&& reloc_entry->addend == 0)
|
||
{
|
||
reloc_entry->address += input_section->output_offset;
|
||
return bfd_reloc_ok;
|
||
}
|
||
|
||
ret = bfd_reloc_ok;
|
||
|
||
if (strcmp (bfd_asymbol_name (symbol), "_gp_disp") == 0)
|
||
{
|
||
boolean relocateable;
|
||
bfd_vma gp;
|
||
|
||
if (ret == bfd_reloc_undefined)
|
||
abort ();
|
||
|
||
if (output_bfd != NULL)
|
||
relocateable = true;
|
||
else
|
||
{
|
||
relocateable = false;
|
||
output_bfd = symbol->section->output_section->owner;
|
||
}
|
||
|
||
ret = mips_elf_final_gp (output_bfd, symbol, relocateable,
|
||
error_message, &gp);
|
||
if (ret != bfd_reloc_ok)
|
||
return ret;
|
||
|
||
relocation = gp - reloc_entry->address;
|
||
}
|
||
else
|
||
{
|
||
if (bfd_is_und_section (symbol->section)
|
||
&& output_bfd == (bfd *) NULL)
|
||
ret = bfd_reloc_undefined;
|
||
|
||
if (bfd_is_com_section (symbol->section))
|
||
relocation = 0;
|
||
else
|
||
relocation = symbol->value;
|
||
}
|
||
|
||
relocation += symbol->section->output_section->vma;
|
||
relocation += symbol->section->output_offset;
|
||
relocation += reloc_entry->addend;
|
||
|
||
if (reloc_entry->address > input_section->_cooked_size)
|
||
return bfd_reloc_outofrange;
|
||
|
||
/* Save the information, and let LO16 do the actual relocation. */
|
||
n = (struct mips_hi16 *) bfd_malloc (sizeof *n);
|
||
if (n == NULL)
|
||
return bfd_reloc_outofrange;
|
||
n->addr = (bfd_byte *) data + reloc_entry->address;
|
||
n->addend = relocation;
|
||
n->next = mips_hi16_list;
|
||
mips_hi16_list = n;
|
||
|
||
if (output_bfd != (bfd *) NULL)
|
||
reloc_entry->address += input_section->output_offset;
|
||
|
||
return ret;
|
||
}
|
||
|
||
/* Do a R_MIPS_LO16 relocation. This is a straightforward 16 bit
|
||
inplace relocation; this function exists in order to do the
|
||
R_MIPS_HI16 relocation described above. */
|
||
|
||
bfd_reloc_status_type
|
||
_bfd_mips_elf_lo16_reloc (abfd,
|
||
reloc_entry,
|
||
symbol,
|
||
data,
|
||
input_section,
|
||
output_bfd,
|
||
error_message)
|
||
bfd *abfd;
|
||
arelent *reloc_entry;
|
||
asymbol *symbol;
|
||
PTR data;
|
||
asection *input_section;
|
||
bfd *output_bfd;
|
||
char **error_message;
|
||
{
|
||
arelent gp_disp_relent;
|
||
|
||
if (mips_hi16_list != NULL)
|
||
{
|
||
struct mips_hi16 *l;
|
||
|
||
l = mips_hi16_list;
|
||
while (l != NULL)
|
||
{
|
||
unsigned long insn;
|
||
unsigned long val;
|
||
unsigned long vallo;
|
||
struct mips_hi16 *next;
|
||
|
||
/* Do the HI16 relocation. Note that we actually don't need
|
||
to know anything about the LO16 itself, except where to
|
||
find the low 16 bits of the addend needed by the LO16. */
|
||
insn = bfd_get_32 (abfd, l->addr);
|
||
vallo = (bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address)
|
||
& 0xffff);
|
||
val = ((insn & 0xffff) << 16) + vallo;
|
||
val += l->addend;
|
||
|
||
/* The low order 16 bits are always treated as a signed
|
||
value. Therefore, a negative value in the low order bits
|
||
requires an adjustment in the high order bits. We need
|
||
to make this adjustment in two ways: once for the bits we
|
||
took from the data, and once for the bits we are putting
|
||
back in to the data. */
|
||
if ((vallo & 0x8000) != 0)
|
||
val -= 0x10000;
|
||
if ((val & 0x8000) != 0)
|
||
val += 0x10000;
|
||
|
||
insn = (insn &~ 0xffff) | ((val >> 16) & 0xffff);
|
||
bfd_put_32 (abfd, insn, l->addr);
|
||
|
||
if (strcmp (bfd_asymbol_name (symbol), "_gp_disp") == 0)
|
||
{
|
||
gp_disp_relent = *reloc_entry;
|
||
reloc_entry = &gp_disp_relent;
|
||
reloc_entry->addend = l->addend;
|
||
}
|
||
|
||
next = l->next;
|
||
free (l);
|
||
l = next;
|
||
}
|
||
|
||
mips_hi16_list = NULL;
|
||
}
|
||
else if (strcmp (bfd_asymbol_name (symbol), "_gp_disp") == 0)
|
||
{
|
||
bfd_reloc_status_type ret;
|
||
bfd_vma gp, relocation;
|
||
|
||
/* FIXME: Does this case ever occur? */
|
||
|
||
ret = mips_elf_final_gp (output_bfd, symbol, true, error_message, &gp);
|
||
if (ret != bfd_reloc_ok)
|
||
return ret;
|
||
|
||
relocation = gp - reloc_entry->address;
|
||
relocation += symbol->section->output_section->vma;
|
||
relocation += symbol->section->output_offset;
|
||
relocation += reloc_entry->addend;
|
||
|
||
if (reloc_entry->address > input_section->_cooked_size)
|
||
return bfd_reloc_outofrange;
|
||
|
||
gp_disp_relent = *reloc_entry;
|
||
reloc_entry = &gp_disp_relent;
|
||
reloc_entry->addend = relocation - 4;
|
||
}
|
||
|
||
/* Now do the LO16 reloc in the usual way. */
|
||
return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
|
||
input_section, output_bfd, error_message);
|
||
}
|
||
|
||
/* Do a R_MIPS_GOT16 reloc. This is a reloc against the global offset
|
||
table used for PIC code. If the symbol is an external symbol, the
|
||
instruction is modified to contain the offset of the appropriate
|
||
entry in the global offset table. If the symbol is a section
|
||
symbol, the next reloc is a R_MIPS_LO16 reloc. The two 16 bit
|
||
addends are combined to form the real addend against the section
|
||
symbol; the GOT16 is modified to contain the offset of an entry in
|
||
the global offset table, and the LO16 is modified to offset it
|
||
appropriately. Thus an offset larger than 16 bits requires a
|
||
modified value in the global offset table.
|
||
|
||
This implementation suffices for the assembler, but the linker does
|
||
not yet know how to create global offset tables. */
|
||
|
||
bfd_reloc_status_type
|
||
_bfd_mips_elf_got16_reloc (abfd,
|
||
reloc_entry,
|
||
symbol,
|
||
data,
|
||
input_section,
|
||
output_bfd,
|
||
error_message)
|
||
bfd *abfd;
|
||
arelent *reloc_entry;
|
||
asymbol *symbol;
|
||
PTR data;
|
||
asection *input_section;
|
||
bfd *output_bfd;
|
||
char **error_message;
|
||
{
|
||
/* If we're relocating, and this an external symbol, we don't want
|
||
to change anything. */
|
||
if (output_bfd != (bfd *) NULL
|
||
&& (symbol->flags & BSF_SECTION_SYM) == 0
|
||
&& reloc_entry->addend == 0)
|
||
{
|
||
reloc_entry->address += input_section->output_offset;
|
||
return bfd_reloc_ok;
|
||
}
|
||
|
||
/* If we're relocating, and this is a local symbol, we can handle it
|
||
just like HI16. */
|
||
if (output_bfd != (bfd *) NULL
|
||
&& (symbol->flags & BSF_SECTION_SYM) != 0)
|
||
return _bfd_mips_elf_hi16_reloc (abfd, reloc_entry, symbol, data,
|
||
input_section, output_bfd, error_message);
|
||
|
||
abort ();
|
||
}
|
||
|
||
/* We have to figure out the gp value, so that we can adjust the
|
||
symbol value correctly. We look up the symbol _gp in the output
|
||
BFD. If we can't find it, we're stuck. We cache it in the ELF
|
||
target data. We don't need to adjust the symbol value for an
|
||
external symbol if we are producing relocateable output. */
|
||
|
||
static bfd_reloc_status_type
|
||
mips_elf_final_gp (output_bfd, symbol, relocateable, error_message, pgp)
|
||
bfd *output_bfd;
|
||
asymbol *symbol;
|
||
boolean relocateable;
|
||
char **error_message;
|
||
bfd_vma *pgp;
|
||
{
|
||
if (bfd_is_und_section (symbol->section)
|
||
&& ! relocateable)
|
||
{
|
||
*pgp = 0;
|
||
return bfd_reloc_undefined;
|
||
}
|
||
|
||
*pgp = _bfd_get_gp_value (output_bfd);
|
||
if (*pgp == 0
|
||
&& (! relocateable
|
||
|| (symbol->flags & BSF_SECTION_SYM) != 0))
|
||
{
|
||
if (relocateable)
|
||
{
|
||
/* Make up a value. */
|
||
*pgp = symbol->section->output_section->vma + 0x4000;
|
||
_bfd_set_gp_value (output_bfd, *pgp);
|
||
}
|
||
else
|
||
{
|
||
unsigned int count;
|
||
asymbol **sym;
|
||
unsigned int i;
|
||
|
||
count = bfd_get_symcount (output_bfd);
|
||
sym = bfd_get_outsymbols (output_bfd);
|
||
|
||
if (sym == (asymbol **) NULL)
|
||
i = count;
|
||
else
|
||
{
|
||
for (i = 0; i < count; i++, sym++)
|
||
{
|
||
register CONST char *name;
|
||
|
||
name = bfd_asymbol_name (*sym);
|
||
if (*name == '_' && strcmp (name, "_gp") == 0)
|
||
{
|
||
*pgp = bfd_asymbol_value (*sym);
|
||
_bfd_set_gp_value (output_bfd, *pgp);
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
if (i >= count)
|
||
{
|
||
/* Only get the error once. */
|
||
*pgp = 4;
|
||
_bfd_set_gp_value (output_bfd, *pgp);
|
||
*error_message =
|
||
(char *) "GP relative relocation when _gp not defined";
|
||
return bfd_reloc_dangerous;
|
||
}
|
||
}
|
||
}
|
||
|
||
return bfd_reloc_ok;
|
||
}
|
||
|
||
/* Do a R_MIPS_GPREL16 relocation. This is a 16 bit value which must
|
||
become the offset from the gp register. This function also handles
|
||
R_MIPS_LITERAL relocations, although those can be handled more
|
||
cleverly because the entries in the .lit8 and .lit4 sections can be
|
||
merged. */
|
||
|
||
static bfd_reloc_status_type gprel16_with_gp PARAMS ((bfd *, asymbol *,
|
||
arelent *, asection *,
|
||
boolean, PTR, bfd_vma));
|
||
|
||
bfd_reloc_status_type
|
||
_bfd_mips_elf_gprel16_reloc (abfd, reloc_entry, symbol, data, input_section,
|
||
output_bfd, error_message)
|
||
bfd *abfd;
|
||
arelent *reloc_entry;
|
||
asymbol *symbol;
|
||
PTR data;
|
||
asection *input_section;
|
||
bfd *output_bfd;
|
||
char **error_message;
|
||
{
|
||
boolean relocateable;
|
||
bfd_reloc_status_type ret;
|
||
bfd_vma gp;
|
||
|
||
/* If we're relocating, and this is an external symbol with no
|
||
addend, we don't want to change anything. We will only have an
|
||
addend if this is a newly created reloc, not read from an ELF
|
||
file. */
|
||
if (output_bfd != (bfd *) NULL
|
||
&& (symbol->flags & BSF_SECTION_SYM) == 0
|
||
&& reloc_entry->addend == 0)
|
||
{
|
||
reloc_entry->address += input_section->output_offset;
|
||
return bfd_reloc_ok;
|
||
}
|
||
|
||
if (output_bfd != (bfd *) NULL)
|
||
relocateable = true;
|
||
else
|
||
{
|
||
relocateable = false;
|
||
output_bfd = symbol->section->output_section->owner;
|
||
}
|
||
|
||
ret = mips_elf_final_gp (output_bfd, symbol, relocateable, error_message,
|
||
&gp);
|
||
if (ret != bfd_reloc_ok)
|
||
return ret;
|
||
|
||
return gprel16_with_gp (abfd, symbol, reloc_entry, input_section,
|
||
relocateable, data, gp);
|
||
}
|
||
|
||
static bfd_reloc_status_type
|
||
gprel16_with_gp (abfd, symbol, reloc_entry, input_section, relocateable, data,
|
||
gp)
|
||
bfd *abfd;
|
||
asymbol *symbol;
|
||
arelent *reloc_entry;
|
||
asection *input_section;
|
||
boolean relocateable;
|
||
PTR data;
|
||
bfd_vma gp;
|
||
{
|
||
bfd_vma relocation;
|
||
unsigned long insn;
|
||
unsigned long val;
|
||
|
||
if (bfd_is_com_section (symbol->section))
|
||
relocation = 0;
|
||
else
|
||
relocation = symbol->value;
|
||
|
||
relocation += symbol->section->output_section->vma;
|
||
relocation += symbol->section->output_offset;
|
||
|
||
if (reloc_entry->address > input_section->_cooked_size)
|
||
return bfd_reloc_outofrange;
|
||
|
||
insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
|
||
|
||
/* Set val to the offset into the section or symbol. */
|
||
if (reloc_entry->howto->src_mask == 0)
|
||
{
|
||
/* This case occurs with the 64-bit MIPS ELF ABI. */
|
||
val = reloc_entry->addend;
|
||
}
|
||
else
|
||
{
|
||
val = ((insn & 0xffff) + reloc_entry->addend) & 0xffff;
|
||
if (val & 0x8000)
|
||
val -= 0x10000;
|
||
}
|
||
|
||
/* Adjust val for the final section location and GP value. If we
|
||
are producing relocateable output, we don't want to do this for
|
||
an external symbol. */
|
||
if (! relocateable
|
||
|| (symbol->flags & BSF_SECTION_SYM) != 0)
|
||
val += relocation - gp;
|
||
|
||
insn = (insn &~ 0xffff) | (val & 0xffff);
|
||
bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
|
||
|
||
if (relocateable)
|
||
reloc_entry->address += input_section->output_offset;
|
||
|
||
/* Make sure it fit in 16 bits. */
|
||
if (val >= 0x8000 && val < 0xffff8000)
|
||
return bfd_reloc_overflow;
|
||
|
||
return bfd_reloc_ok;
|
||
}
|
||
|
||
/* Do a R_MIPS_GPREL32 relocation. Is this 32 bit value the offset
|
||
from the gp register? XXX */
|
||
|
||
static bfd_reloc_status_type gprel32_with_gp PARAMS ((bfd *, asymbol *,
|
||
arelent *, asection *,
|
||
boolean, PTR, bfd_vma));
|
||
|
||
bfd_reloc_status_type
|
||
_bfd_mips_elf_gprel32_reloc (abfd,
|
||
reloc_entry,
|
||
symbol,
|
||
data,
|
||
input_section,
|
||
output_bfd,
|
||
error_message)
|
||
bfd *abfd;
|
||
arelent *reloc_entry;
|
||
asymbol *symbol;
|
||
PTR data;
|
||
asection *input_section;
|
||
bfd *output_bfd;
|
||
char **error_message;
|
||
{
|
||
boolean relocateable;
|
||
bfd_reloc_status_type ret;
|
||
bfd_vma gp;
|
||
|
||
/* If we're relocating, and this is an external symbol with no
|
||
addend, we don't want to change anything. We will only have an
|
||
addend if this is a newly created reloc, not read from an ELF
|
||
file. */
|
||
if (output_bfd != (bfd *) NULL
|
||
&& (symbol->flags & BSF_SECTION_SYM) == 0
|
||
&& reloc_entry->addend == 0)
|
||
{
|
||
*error_message = (char *)
|
||
"32bits gp relative relocation occurs for an external symbol";
|
||
return bfd_reloc_outofrange;
|
||
}
|
||
|
||
if (output_bfd != (bfd *) NULL)
|
||
{
|
||
relocateable = true;
|
||
gp = _bfd_get_gp_value (output_bfd);
|
||
}
|
||
else
|
||
{
|
||
relocateable = false;
|
||
output_bfd = symbol->section->output_section->owner;
|
||
|
||
ret = mips_elf_final_gp (output_bfd, symbol, relocateable,
|
||
error_message, &gp);
|
||
if (ret != bfd_reloc_ok)
|
||
return ret;
|
||
}
|
||
|
||
return gprel32_with_gp (abfd, symbol, reloc_entry, input_section,
|
||
relocateable, data, gp);
|
||
}
|
||
|
||
static bfd_reloc_status_type
|
||
gprel32_with_gp (abfd, symbol, reloc_entry, input_section, relocateable, data,
|
||
gp)
|
||
bfd *abfd;
|
||
asymbol *symbol;
|
||
arelent *reloc_entry;
|
||
asection *input_section;
|
||
boolean relocateable;
|
||
PTR data;
|
||
bfd_vma gp;
|
||
{
|
||
bfd_vma relocation;
|
||
unsigned long val;
|
||
|
||
if (bfd_is_com_section (symbol->section))
|
||
relocation = 0;
|
||
else
|
||
relocation = symbol->value;
|
||
|
||
relocation += symbol->section->output_section->vma;
|
||
relocation += symbol->section->output_offset;
|
||
|
||
if (reloc_entry->address > input_section->_cooked_size)
|
||
return bfd_reloc_outofrange;
|
||
|
||
if (reloc_entry->howto->src_mask == 0)
|
||
{
|
||
/* This case arises with the 64-bit MIPS ELF ABI. */
|
||
val = 0;
|
||
}
|
||
else
|
||
val = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
|
||
|
||
/* Set val to the offset into the section or symbol. */
|
||
val += reloc_entry->addend;
|
||
|
||
/* Adjust val for the final section location and GP value. If we
|
||
are producing relocateable output, we don't want to do this for
|
||
an external symbol. */
|
||
if (! relocateable
|
||
|| (symbol->flags & BSF_SECTION_SYM) != 0)
|
||
val += relocation - gp;
|
||
|
||
bfd_put_32 (abfd, val, (bfd_byte *) data + reloc_entry->address);
|
||
|
||
if (relocateable)
|
||
reloc_entry->address += input_section->output_offset;
|
||
|
||
return bfd_reloc_ok;
|
||
}
|
||
|
||
/* A mapping from BFD reloc types to MIPS ELF reloc types. */
|
||
|
||
struct elf_reloc_map {
|
||
bfd_reloc_code_real_type bfd_reloc_val;
|
||
enum reloc_type elf_reloc_val;
|
||
};
|
||
|
||
static CONST struct elf_reloc_map mips_reloc_map[] =
|
||
{
|
||
{ BFD_RELOC_NONE, R_MIPS_NONE, },
|
||
{ BFD_RELOC_16, R_MIPS_16 },
|
||
{ BFD_RELOC_32, R_MIPS_32 },
|
||
{ BFD_RELOC_CTOR, R_MIPS_32 },
|
||
{ BFD_RELOC_MIPS_JMP, R_MIPS_26 },
|
||
{ BFD_RELOC_HI16_S, R_MIPS_HI16 },
|
||
{ BFD_RELOC_LO16, R_MIPS_LO16 },
|
||
{ BFD_RELOC_MIPS_GPREL, R_MIPS_GPREL16 },
|
||
{ BFD_RELOC_MIPS_LITERAL, R_MIPS_LITERAL },
|
||
{ BFD_RELOC_MIPS_GOT16, R_MIPS_GOT16 },
|
||
{ BFD_RELOC_16_PCREL, R_MIPS_PC16 },
|
||
{ BFD_RELOC_MIPS_CALL16, R_MIPS_CALL16 },
|
||
{ BFD_RELOC_MIPS_GPREL32, R_MIPS_GPREL32 },
|
||
{ BFD_RELOC_MIPS_GOT_HI16, R_MIPS_GOT_HI16 },
|
||
{ BFD_RELOC_MIPS_GOT_LO16, R_MIPS_GOT_LO16 },
|
||
{ BFD_RELOC_MIPS_CALL_HI16, R_MIPS_CALL_HI16 },
|
||
{ BFD_RELOC_MIPS_CALL_LO16, R_MIPS_CALL_LO16 }
|
||
};
|
||
|
||
/* Given a BFD reloc type, return a howto structure. */
|
||
|
||
static reloc_howto_type *
|
||
bfd_elf32_bfd_reloc_type_lookup (abfd, code)
|
||
bfd *abfd;
|
||
bfd_reloc_code_real_type code;
|
||
{
|
||
unsigned int i;
|
||
|
||
for (i = 0; i < sizeof (mips_reloc_map) / sizeof (struct elf_reloc_map); i++)
|
||
{
|
||
if (mips_reloc_map[i].bfd_reloc_val == code)
|
||
return &elf_mips_howto_table[(int) mips_reloc_map[i].elf_reloc_val];
|
||
}
|
||
return NULL;
|
||
}
|
||
|
||
/* Given a MIPS reloc type, fill in an arelent structure. */
|
||
|
||
static void
|
||
mips_info_to_howto_rel (abfd, cache_ptr, dst)
|
||
bfd *abfd;
|
||
arelent *cache_ptr;
|
||
Elf32_Internal_Rel *dst;
|
||
{
|
||
unsigned int r_type;
|
||
|
||
r_type = ELF32_R_TYPE (dst->r_info);
|
||
BFD_ASSERT (r_type < (unsigned int) R_MIPS_max);
|
||
cache_ptr->howto = &elf_mips_howto_table[r_type];
|
||
|
||
/* The addend for a GPREL16 or LITERAL relocation comes from the GP
|
||
value for the object file. We get the addend now, rather than
|
||
when we do the relocation, because the symbol manipulations done
|
||
by the linker may cause us to lose track of the input BFD. */
|
||
if (((*cache_ptr->sym_ptr_ptr)->flags & BSF_SECTION_SYM) != 0
|
||
&& (r_type == (unsigned int) R_MIPS_GPREL16
|
||
|| r_type == (unsigned int) R_MIPS_LITERAL))
|
||
cache_ptr->addend = elf_gp (abfd);
|
||
}
|
||
|
||
/* A .reginfo section holds a single Elf32_RegInfo structure. These
|
||
routines swap this structure in and out. They are used outside of
|
||
BFD, so they are globally visible. */
|
||
|
||
void
|
||
bfd_mips_elf32_swap_reginfo_in (abfd, ex, in)
|
||
bfd *abfd;
|
||
const Elf32_External_RegInfo *ex;
|
||
Elf32_RegInfo *in;
|
||
{
|
||
in->ri_gprmask = bfd_h_get_32 (abfd, (bfd_byte *) ex->ri_gprmask);
|
||
in->ri_cprmask[0] = bfd_h_get_32 (abfd, (bfd_byte *) ex->ri_cprmask[0]);
|
||
in->ri_cprmask[1] = bfd_h_get_32 (abfd, (bfd_byte *) ex->ri_cprmask[1]);
|
||
in->ri_cprmask[2] = bfd_h_get_32 (abfd, (bfd_byte *) ex->ri_cprmask[2]);
|
||
in->ri_cprmask[3] = bfd_h_get_32 (abfd, (bfd_byte *) ex->ri_cprmask[3]);
|
||
in->ri_gp_value = bfd_h_get_32 (abfd, (bfd_byte *) ex->ri_gp_value);
|
||
}
|
||
|
||
void
|
||
bfd_mips_elf32_swap_reginfo_out (abfd, in, ex)
|
||
bfd *abfd;
|
||
const Elf32_RegInfo *in;
|
||
Elf32_External_RegInfo *ex;
|
||
{
|
||
bfd_h_put_32 (abfd, (bfd_vma) in->ri_gprmask,
|
||
(bfd_byte *) ex->ri_gprmask);
|
||
bfd_h_put_32 (abfd, (bfd_vma) in->ri_cprmask[0],
|
||
(bfd_byte *) ex->ri_cprmask[0]);
|
||
bfd_h_put_32 (abfd, (bfd_vma) in->ri_cprmask[1],
|
||
(bfd_byte *) ex->ri_cprmask[1]);
|
||
bfd_h_put_32 (abfd, (bfd_vma) in->ri_cprmask[2],
|
||
(bfd_byte *) ex->ri_cprmask[2]);
|
||
bfd_h_put_32 (abfd, (bfd_vma) in->ri_cprmask[3],
|
||
(bfd_byte *) ex->ri_cprmask[3]);
|
||
bfd_h_put_32 (abfd, (bfd_vma) in->ri_gp_value,
|
||
(bfd_byte *) ex->ri_gp_value);
|
||
}
|
||
|
||
/* In the 64 bit ABI, the .MIPS.options section holds register
|
||
information in an Elf64_Reginfo structure. These routines swap
|
||
them in and out. They are globally visible because they are used
|
||
outside of BFD. These routines are here so that gas can call them
|
||
without worrying about whether the 64 bit ABI has been included. */
|
||
|
||
void
|
||
bfd_mips_elf64_swap_reginfo_in (abfd, ex, in)
|
||
bfd *abfd;
|
||
const Elf64_External_RegInfo *ex;
|
||
Elf64_Internal_RegInfo *in;
|
||
{
|
||
in->ri_gprmask = bfd_h_get_32 (abfd, (bfd_byte *) ex->ri_gprmask);
|
||
in->ri_pad = bfd_h_get_32 (abfd, (bfd_byte *) ex->ri_pad);
|
||
in->ri_cprmask[0] = bfd_h_get_32 (abfd, (bfd_byte *) ex->ri_cprmask[0]);
|
||
in->ri_cprmask[1] = bfd_h_get_32 (abfd, (bfd_byte *) ex->ri_cprmask[1]);
|
||
in->ri_cprmask[2] = bfd_h_get_32 (abfd, (bfd_byte *) ex->ri_cprmask[2]);
|
||
in->ri_cprmask[3] = bfd_h_get_32 (abfd, (bfd_byte *) ex->ri_cprmask[3]);
|
||
in->ri_gp_value = bfd_h_get_64 (abfd, (bfd_byte *) ex->ri_gp_value);
|
||
}
|
||
|
||
void
|
||
bfd_mips_elf64_swap_reginfo_out (abfd, in, ex)
|
||
bfd *abfd;
|
||
const Elf64_Internal_RegInfo *in;
|
||
Elf64_External_RegInfo *ex;
|
||
{
|
||
bfd_h_put_32 (abfd, (bfd_vma) in->ri_gprmask,
|
||
(bfd_byte *) ex->ri_gprmask);
|
||
bfd_h_put_32 (abfd, (bfd_vma) in->ri_pad,
|
||
(bfd_byte *) ex->ri_pad);
|
||
bfd_h_put_32 (abfd, (bfd_vma) in->ri_cprmask[0],
|
||
(bfd_byte *) ex->ri_cprmask[0]);
|
||
bfd_h_put_32 (abfd, (bfd_vma) in->ri_cprmask[1],
|
||
(bfd_byte *) ex->ri_cprmask[1]);
|
||
bfd_h_put_32 (abfd, (bfd_vma) in->ri_cprmask[2],
|
||
(bfd_byte *) ex->ri_cprmask[2]);
|
||
bfd_h_put_32 (abfd, (bfd_vma) in->ri_cprmask[3],
|
||
(bfd_byte *) ex->ri_cprmask[3]);
|
||
bfd_h_put_64 (abfd, (bfd_vma) in->ri_gp_value,
|
||
(bfd_byte *) ex->ri_gp_value);
|
||
}
|
||
|
||
/* Swap an entry in a .gptab section. Note that these routines rely
|
||
on the equivalence of the two elements of the union. */
|
||
|
||
static void
|
||
bfd_mips_elf32_swap_gptab_in (abfd, ex, in)
|
||
bfd *abfd;
|
||
const Elf32_External_gptab *ex;
|
||
Elf32_gptab *in;
|
||
{
|
||
in->gt_entry.gt_g_value = bfd_h_get_32 (abfd, ex->gt_entry.gt_g_value);
|
||
in->gt_entry.gt_bytes = bfd_h_get_32 (abfd, ex->gt_entry.gt_bytes);
|
||
}
|
||
|
||
static void
|
||
bfd_mips_elf32_swap_gptab_out (abfd, in, ex)
|
||
bfd *abfd;
|
||
const Elf32_gptab *in;
|
||
Elf32_External_gptab *ex;
|
||
{
|
||
bfd_h_put_32 (abfd, (bfd_vma) in->gt_entry.gt_g_value,
|
||
ex->gt_entry.gt_g_value);
|
||
bfd_h_put_32 (abfd, (bfd_vma) in->gt_entry.gt_bytes,
|
||
ex->gt_entry.gt_bytes);
|
||
}
|
||
|
||
static void
|
||
bfd_elf32_swap_compact_rel_out (abfd, in, ex)
|
||
bfd *abfd;
|
||
const Elf32_compact_rel *in;
|
||
Elf32_External_compact_rel *ex;
|
||
{
|
||
bfd_h_put_32 (abfd, (bfd_vma) in->id1, ex->id1);
|
||
bfd_h_put_32 (abfd, (bfd_vma) in->num, ex->num);
|
||
bfd_h_put_32 (abfd, (bfd_vma) in->id2, ex->id2);
|
||
bfd_h_put_32 (abfd, (bfd_vma) in->offset, ex->offset);
|
||
bfd_h_put_32 (abfd, (bfd_vma) in->reserved0, ex->reserved0);
|
||
bfd_h_put_32 (abfd, (bfd_vma) in->reserved1, ex->reserved1);
|
||
}
|
||
|
||
static void
|
||
bfd_elf32_swap_crinfo_out (abfd, in, ex)
|
||
bfd *abfd;
|
||
const Elf32_crinfo *in;
|
||
Elf32_External_crinfo *ex;
|
||
{
|
||
unsigned long l;
|
||
|
||
l = (((in->ctype & CRINFO_CTYPE) << CRINFO_CTYPE_SH)
|
||
| ((in->rtype & CRINFO_RTYPE) << CRINFO_RTYPE_SH)
|
||
| ((in->dist2to & CRINFO_DIST2TO) << CRINFO_DIST2TO_SH)
|
||
| ((in->relvaddr & CRINFO_RELVADDR) << CRINFO_RELVADDR_SH));
|
||
bfd_h_put_32 (abfd, (bfd_vma) l, ex->info);
|
||
bfd_h_put_32 (abfd, (bfd_vma) in->konst, ex->konst);
|
||
bfd_h_put_32 (abfd, (bfd_vma) in->vaddr, ex->vaddr);
|
||
}
|
||
|
||
/* Swap in an options header. */
|
||
|
||
void
|
||
bfd_mips_elf_swap_options_in (abfd, ex, in)
|
||
bfd *abfd;
|
||
const Elf_External_Options *ex;
|
||
Elf_Internal_Options *in;
|
||
{
|
||
in->kind = bfd_h_get_8 (abfd, ex->kind);
|
||
in->size = bfd_h_get_8 (abfd, ex->size);
|
||
in->section = bfd_h_get_16 (abfd, ex->section);
|
||
in->info = bfd_h_get_32 (abfd, ex->info);
|
||
}
|
||
|
||
/* Swap out an options header. */
|
||
|
||
void
|
||
bfd_mips_elf_swap_options_out (abfd, in, ex)
|
||
bfd *abfd;
|
||
const Elf_Internal_Options *in;
|
||
Elf_External_Options *ex;
|
||
{
|
||
bfd_h_put_8 (abfd, in->kind, ex->kind);
|
||
bfd_h_put_8 (abfd, in->size, ex->size);
|
||
bfd_h_put_16 (abfd, in->section, ex->section);
|
||
bfd_h_put_32 (abfd, in->info, ex->info);
|
||
}
|
||
|
||
/* Determine whether a symbol is global for the purposes of splitting
|
||
the symbol table into global symbols and local symbols. At least
|
||
on Irix 5, this split must be between section symbols and all other
|
||
symbols. On most ELF targets the split is between static symbols
|
||
and externally visible symbols. */
|
||
|
||
/*ARGSUSED*/
|
||
static boolean
|
||
mips_elf_sym_is_global (abfd, sym)
|
||
bfd *abfd;
|
||
asymbol *sym;
|
||
{
|
||
return (sym->flags & BSF_SECTION_SYM) == 0 ? true : false;
|
||
}
|
||
|
||
/* Set the right machine number for a MIPS ELF file. This is used for
|
||
both the 32-bit and the 64-bit ABI. */
|
||
|
||
boolean
|
||
_bfd_mips_elf_object_p (abfd)
|
||
bfd *abfd;
|
||
{
|
||
switch (elf_elfheader (abfd)->e_flags & EF_MIPS_ARCH)
|
||
{
|
||
default:
|
||
case E_MIPS_ARCH_1:
|
||
/* Just use the default, which was set in elfcode.h. */
|
||
break;
|
||
|
||
case E_MIPS_ARCH_2:
|
||
(void) bfd_default_set_arch_mach (abfd, bfd_arch_mips, 6000);
|
||
break;
|
||
|
||
case E_MIPS_ARCH_3:
|
||
(void) bfd_default_set_arch_mach (abfd, bfd_arch_mips, 4000);
|
||
break;
|
||
|
||
case E_MIPS_ARCH_4:
|
||
(void) bfd_default_set_arch_mach (abfd, bfd_arch_mips, 8000);
|
||
break;
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Set the right machine number for a 32-bit MIPS ELF file. */
|
||
|
||
static boolean
|
||
mips_elf32_object_p (abfd)
|
||
bfd *abfd;
|
||
{
|
||
/* Irix 5 is broken. Object file symbol tables are not always
|
||
sorted correctly such that local symbols precede global symbols,
|
||
and the sh_info field in the symbol table is not always right. */
|
||
elf_bad_symtab (abfd) = true;
|
||
|
||
return _bfd_mips_elf_object_p (abfd);
|
||
}
|
||
|
||
/* The final processing done just before writing out a MIPS ELF object
|
||
file. This gets the MIPS architecture right based on the machine
|
||
number. This is used by both the 32-bit and the 64-bit ABI. */
|
||
|
||
/*ARGSUSED*/
|
||
void
|
||
_bfd_mips_elf_final_write_processing (abfd, linker)
|
||
bfd *abfd;
|
||
boolean linker;
|
||
{
|
||
unsigned long val;
|
||
unsigned int i;
|
||
Elf_Internal_Shdr **hdrpp;
|
||
const char *name;
|
||
asection *sec;
|
||
|
||
switch (bfd_get_mach (abfd))
|
||
{
|
||
case 3000:
|
||
val = E_MIPS_ARCH_1;
|
||
break;
|
||
|
||
case 6000:
|
||
val = E_MIPS_ARCH_2;
|
||
break;
|
||
|
||
case 4000:
|
||
val = E_MIPS_ARCH_3;
|
||
break;
|
||
|
||
case 8000:
|
||
val = E_MIPS_ARCH_4;
|
||
break;
|
||
|
||
default:
|
||
val = 0;
|
||
break;
|
||
}
|
||
|
||
elf_elfheader (abfd)->e_flags &=~ EF_MIPS_ARCH;
|
||
elf_elfheader (abfd)->e_flags |= val;
|
||
|
||
/* Set the sh_info field for .gptab sections. */
|
||
for (i = 1, hdrpp = elf_elfsections (abfd) + 1;
|
||
i < elf_elfheader (abfd)->e_shnum;
|
||
i++, hdrpp++)
|
||
{
|
||
switch ((*hdrpp)->sh_type)
|
||
{
|
||
case SHT_MIPS_LIBLIST:
|
||
sec = bfd_get_section_by_name (abfd, ".dynstr");
|
||
if (sec != NULL)
|
||
(*hdrpp)->sh_link = elf_section_data (sec)->this_idx;
|
||
break;
|
||
|
||
case SHT_MIPS_GPTAB:
|
||
BFD_ASSERT ((*hdrpp)->bfd_section != NULL);
|
||
name = bfd_get_section_name (abfd, (*hdrpp)->bfd_section);
|
||
BFD_ASSERT (name != NULL
|
||
&& strncmp (name, ".gptab.", sizeof ".gptab." - 1) == 0);
|
||
sec = bfd_get_section_by_name (abfd, name + sizeof ".gptab" - 1);
|
||
BFD_ASSERT (sec != NULL);
|
||
(*hdrpp)->sh_info = elf_section_data (sec)->this_idx;
|
||
break;
|
||
|
||
case SHT_MIPS_CONTENT:
|
||
BFD_ASSERT ((*hdrpp)->bfd_section != NULL);
|
||
name = bfd_get_section_name (abfd, (*hdrpp)->bfd_section);
|
||
BFD_ASSERT (name != NULL
|
||
&& strncmp (name, ".MIPS.content",
|
||
sizeof ".MIPS.content" - 1) == 0);
|
||
sec = bfd_get_section_by_name (abfd,
|
||
name + sizeof ".MIPS.content" - 1);
|
||
BFD_ASSERT (sec != NULL);
|
||
(*hdrpp)->sh_info = elf_section_data (sec)->this_idx;
|
||
break;
|
||
|
||
case SHT_MIPS_SYMBOL_LIB:
|
||
sec = bfd_get_section_by_name (abfd, ".dynsym");
|
||
if (sec != NULL)
|
||
(*hdrpp)->sh_link = elf_section_data (sec)->this_idx;
|
||
sec = bfd_get_section_by_name (abfd, ".liblist");
|
||
if (sec != NULL)
|
||
(*hdrpp)->sh_info = elf_section_data (sec)->this_idx;
|
||
break;
|
||
|
||
case SHT_MIPS_EVENTS:
|
||
BFD_ASSERT ((*hdrpp)->bfd_section != NULL);
|
||
name = bfd_get_section_name (abfd, (*hdrpp)->bfd_section);
|
||
BFD_ASSERT (name != NULL);
|
||
if (strncmp (name, ".MIPS.events", sizeof ".MIPS.events" - 1) == 0)
|
||
sec = bfd_get_section_by_name (abfd,
|
||
name + sizeof ".MIPS.events" - 1);
|
||
else
|
||
{
|
||
BFD_ASSERT (strncmp (name, ".MIPS.post_rel",
|
||
sizeof ".MIPS.post_rel" - 1) == 0);
|
||
sec = bfd_get_section_by_name (abfd,
|
||
(name
|
||
+ sizeof ".MIPS.post_rel" - 1));
|
||
}
|
||
BFD_ASSERT (sec != NULL);
|
||
(*hdrpp)->sh_link = elf_section_data (sec)->this_idx;
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Function to keep MIPS specific file flags like as EF_MIPS_PIC. */
|
||
|
||
boolean
|
||
_bfd_mips_elf_set_private_flags (abfd, flags)
|
||
bfd *abfd;
|
||
flagword flags;
|
||
{
|
||
BFD_ASSERT (!elf_flags_init (abfd)
|
||
|| elf_elfheader (abfd)->e_flags == flags);
|
||
|
||
elf_elfheader (abfd)->e_flags = flags;
|
||
elf_flags_init (abfd) = true;
|
||
return true;
|
||
}
|
||
|
||
/* Copy backend specific data from one object module to another */
|
||
|
||
boolean
|
||
_bfd_mips_elf_copy_private_bfd_data (ibfd, obfd)
|
||
bfd *ibfd;
|
||
bfd *obfd;
|
||
{
|
||
/* This function is selected based on the input vector. We only
|
||
want to copy information over if the output BFD also uses Elf
|
||
format. */
|
||
if (bfd_get_flavour (obfd) != bfd_target_elf_flavour)
|
||
return true;
|
||
|
||
BFD_ASSERT (!elf_flags_init (obfd)
|
||
|| (elf_elfheader (obfd)->e_flags
|
||
== elf_elfheader (ibfd)->e_flags));
|
||
|
||
elf_gp (obfd) = elf_gp (ibfd);
|
||
elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
|
||
elf_flags_init (obfd) = true;
|
||
return true;
|
||
}
|
||
|
||
/* Merge backend specific data from an object file to the output
|
||
object file when linking. */
|
||
|
||
boolean
|
||
_bfd_mips_elf_merge_private_bfd_data (ibfd, obfd)
|
||
bfd *ibfd;
|
||
bfd *obfd;
|
||
{
|
||
flagword old_flags;
|
||
flagword new_flags;
|
||
|
||
/* Check if we have the same endianess */
|
||
if (ibfd->xvec->byteorder != obfd->xvec->byteorder
|
||
&& obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
|
||
{
|
||
(*_bfd_error_handler)
|
||
("%s: compiled for a %s endian system and target is %s endian",
|
||
bfd_get_filename (ibfd),
|
||
bfd_big_endian (ibfd) ? "big" : "little",
|
||
bfd_big_endian (obfd) ? "big" : "little");
|
||
|
||
bfd_set_error (bfd_error_wrong_format);
|
||
return false;
|
||
}
|
||
|
||
/* This function is selected based on the input vector. We only
|
||
want to copy information over if the output BFD also uses Elf
|
||
format. */
|
||
if (bfd_get_flavour (obfd) != bfd_target_elf_flavour)
|
||
return true;
|
||
|
||
new_flags = elf_elfheader (ibfd)->e_flags;
|
||
elf_elfheader (obfd)->e_flags |= new_flags & EF_MIPS_NOREORDER;
|
||
old_flags = elf_elfheader (obfd)->e_flags;
|
||
|
||
if (!elf_flags_init (obfd)) /* First call, no flags set */
|
||
{
|
||
elf_flags_init (obfd) = true;
|
||
elf_elfheader (obfd)->e_flags = new_flags;
|
||
}
|
||
else if (((new_flags ^ old_flags) & ~EF_MIPS_NOREORDER)
|
||
== 0) /* Compatible flags are ok */
|
||
;
|
||
else /* Incompatible flags */
|
||
{
|
||
/* Warn about -fPIC mismatch */
|
||
if ((new_flags & EF_MIPS_PIC) != (old_flags & EF_MIPS_PIC))
|
||
{
|
||
new_flags &= ~EF_MIPS_PIC;
|
||
(*_bfd_error_handler)
|
||
("%s: needs all files compiled with -fPIC",
|
||
bfd_get_filename (ibfd));
|
||
}
|
||
|
||
if ((new_flags & EF_MIPS_CPIC) != (old_flags & EF_MIPS_CPIC))
|
||
{
|
||
new_flags &= ~EF_MIPS_CPIC;
|
||
(*_bfd_error_handler)
|
||
("%s: needs all files compiled with -mabicalls",
|
||
bfd_get_filename (ibfd));
|
||
}
|
||
|
||
/* Warn about any other mismatches */
|
||
if (new_flags != old_flags)
|
||
(*_bfd_error_handler)
|
||
("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)",
|
||
bfd_get_filename (ibfd), (unsigned long) new_flags,
|
||
(unsigned long) old_flags);
|
||
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return false;
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Handle a MIPS specific section when reading an object file. This
|
||
is called when elfcode.h finds a section with an unknown type.
|
||
This routine supports both the 32-bit and 64-bit ELF ABI.
|
||
|
||
FIXME: We need to handle the SHF_MIPS_GPREL flag, but I'm not sure
|
||
how to. */
|
||
|
||
boolean
|
||
_bfd_mips_elf_section_from_shdr (abfd, hdr, name)
|
||
bfd *abfd;
|
||
Elf_Internal_Shdr *hdr;
|
||
const char *name;
|
||
{
|
||
/* There ought to be a place to keep ELF backend specific flags, but
|
||
at the moment there isn't one. We just keep track of the
|
||
sections by their name, instead. Fortunately, the ABI gives
|
||
suggested names for all the MIPS specific sections, so we will
|
||
probably get away with this. */
|
||
switch (hdr->sh_type)
|
||
{
|
||
case SHT_MIPS_LIBLIST:
|
||
if (strcmp (name, ".liblist") != 0)
|
||
return false;
|
||
break;
|
||
case SHT_MIPS_MSYM:
|
||
if (strcmp (name, ".msym") != 0)
|
||
return false;
|
||
break;
|
||
case SHT_MIPS_CONFLICT:
|
||
if (strcmp (name, ".conflict") != 0)
|
||
return false;
|
||
break;
|
||
case SHT_MIPS_GPTAB:
|
||
if (strncmp (name, ".gptab.", sizeof ".gptab." - 1) != 0)
|
||
return false;
|
||
break;
|
||
case SHT_MIPS_UCODE:
|
||
if (strcmp (name, ".ucode") != 0)
|
||
return false;
|
||
break;
|
||
case SHT_MIPS_DEBUG:
|
||
if (strcmp (name, ".mdebug") != 0)
|
||
return false;
|
||
break;
|
||
case SHT_MIPS_REGINFO:
|
||
if (strcmp (name, ".reginfo") != 0
|
||
|| hdr->sh_size != sizeof (Elf32_External_RegInfo))
|
||
return false;
|
||
break;
|
||
case SHT_MIPS_IFACE:
|
||
if (strcmp (name, ".MIPS.interfaces") != 0)
|
||
return false;
|
||
break;
|
||
case SHT_MIPS_CONTENT:
|
||
if (strncmp (name, ".MIPS.content", sizeof ".MIPS.content" - 1) != 0)
|
||
return false;
|
||
break;
|
||
case SHT_MIPS_OPTIONS:
|
||
if (strcmp (name, ".options") != 0
|
||
&& strcmp (name, ".MIPS.options") != 0)
|
||
return false;
|
||
break;
|
||
case SHT_MIPS_DWARF:
|
||
if (strncmp (name, ".debug_", sizeof ".debug_" - 1) != 0)
|
||
return false;
|
||
break;
|
||
case SHT_MIPS_SYMBOL_LIB:
|
||
if (strcmp (name, ".MIPS.symlib") != 0)
|
||
return false;
|
||
break;
|
||
case SHT_MIPS_EVENTS:
|
||
if (strncmp (name, ".MIPS.events", sizeof ".MIPS.events" - 1) != 0
|
||
&& strncmp (name, ".MIPS.post_rel",
|
||
sizeof ".MIPS.post_rel" - 1) != 0)
|
||
return false;
|
||
break;
|
||
default:
|
||
return false;
|
||
}
|
||
|
||
if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
|
||
return false;
|
||
|
||
if (hdr->sh_type == SHT_MIPS_DEBUG)
|
||
{
|
||
if (! bfd_set_section_flags (abfd, hdr->bfd_section,
|
||
(bfd_get_section_flags (abfd,
|
||
hdr->bfd_section)
|
||
| SEC_DEBUGGING)))
|
||
return false;
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Handle a 32-bit MIPS ELF specific section. */
|
||
|
||
static boolean
|
||
mips_elf32_section_from_shdr (abfd, hdr, name)
|
||
bfd *abfd;
|
||
Elf_Internal_Shdr *hdr;
|
||
char *name;
|
||
{
|
||
if (! _bfd_mips_elf_section_from_shdr (abfd, hdr, name))
|
||
return false;
|
||
|
||
/* FIXME: We should record sh_info for a .gptab section. */
|
||
|
||
/* For a .reginfo section, set the gp value in the tdata information
|
||
from the contents of this section. We need the gp value while
|
||
processing relocs, so we just get it now. The .reginfo section
|
||
is not used in the 64-bit MIPS ELF ABI. */
|
||
if (hdr->sh_type == SHT_MIPS_REGINFO)
|
||
{
|
||
Elf32_External_RegInfo ext;
|
||
Elf32_RegInfo s;
|
||
|
||
if (! bfd_get_section_contents (abfd, hdr->bfd_section, (PTR) &ext,
|
||
(file_ptr) 0, sizeof ext))
|
||
return false;
|
||
bfd_mips_elf32_swap_reginfo_in (abfd, &ext, &s);
|
||
elf_gp (abfd) = s.ri_gp_value;
|
||
}
|
||
|
||
/* For a SHT_MIPS_OPTIONS section, look for a ODK_REGINFO entry, and
|
||
set the gp value based on what we find. We may see both
|
||
SHT_MIPS_REGINFO and SHT_MIPS_OPTIONS/ODK_REGINFO; in that case,
|
||
they should agree. */
|
||
if (hdr->sh_type == SHT_MIPS_OPTIONS)
|
||
{
|
||
bfd_byte *contents, *l, *lend;
|
||
|
||
contents = (bfd_byte *) bfd_malloc (hdr->sh_size);
|
||
if (contents == NULL)
|
||
return false;
|
||
if (! bfd_get_section_contents (abfd, hdr->bfd_section, contents,
|
||
(file_ptr) 0, hdr->sh_size))
|
||
{
|
||
free (contents);
|
||
return false;
|
||
}
|
||
l = contents;
|
||
lend = contents + hdr->sh_size;
|
||
while (l + sizeof (Elf_External_Options) <= lend)
|
||
{
|
||
Elf_Internal_Options intopt;
|
||
|
||
bfd_mips_elf_swap_options_in (abfd, (Elf_External_Options *) l,
|
||
&intopt);
|
||
if (intopt.kind == ODK_REGINFO)
|
||
{
|
||
Elf32_RegInfo intreg;
|
||
|
||
bfd_mips_elf32_swap_reginfo_in
|
||
(abfd,
|
||
((Elf32_External_RegInfo *)
|
||
(l + sizeof (Elf_External_Options))),
|
||
&intreg);
|
||
elf_gp (abfd) = intreg.ri_gp_value;
|
||
}
|
||
l += intopt.size;
|
||
}
|
||
free (contents);
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Set the correct type for a MIPS ELF section. We do this by the
|
||
section name, which is a hack, but ought to work. This routine is
|
||
used by both the 32-bit and the 64-bit ABI. */
|
||
|
||
boolean
|
||
_bfd_mips_elf_fake_sections (abfd, hdr, sec)
|
||
bfd *abfd;
|
||
Elf32_Internal_Shdr *hdr;
|
||
asection *sec;
|
||
{
|
||
register const char *name;
|
||
|
||
name = bfd_get_section_name (abfd, sec);
|
||
|
||
if (strcmp (name, ".liblist") == 0)
|
||
{
|
||
hdr->sh_type = SHT_MIPS_LIBLIST;
|
||
hdr->sh_info = sec->_raw_size / sizeof (Elf32_Lib);
|
||
/* The sh_link field is set in final_write_processing. */
|
||
}
|
||
else if (strcmp (name, ".msym") == 0)
|
||
{
|
||
hdr->sh_type = SHT_MIPS_MSYM;
|
||
hdr->sh_entsize = 8;
|
||
/* FIXME: Set the sh_info field. */
|
||
}
|
||
else if (strcmp (name, ".conflict") == 0)
|
||
hdr->sh_type = SHT_MIPS_CONFLICT;
|
||
else if (strncmp (name, ".gptab.", sizeof ".gptab." - 1) == 0)
|
||
{
|
||
hdr->sh_type = SHT_MIPS_GPTAB;
|
||
hdr->sh_entsize = sizeof (Elf32_External_gptab);
|
||
/* The sh_info field is set in final_write_processing. */
|
||
}
|
||
else if (strcmp (name, ".ucode") == 0)
|
||
hdr->sh_type = SHT_MIPS_UCODE;
|
||
else if (strcmp (name, ".mdebug") == 0)
|
||
{
|
||
hdr->sh_type = SHT_MIPS_DEBUG;
|
||
/* In a shared object on Irix 5.3, the .mdebug section has an
|
||
entsize of 0. FIXME: Does this matter? */
|
||
if (SGI_COMPAT (abfd) && (abfd->flags & DYNAMIC) != 0)
|
||
hdr->sh_entsize = 0;
|
||
else
|
||
hdr->sh_entsize = 1;
|
||
}
|
||
else if (strcmp (name, ".reginfo") == 0)
|
||
{
|
||
hdr->sh_type = SHT_MIPS_REGINFO;
|
||
/* In a shared object on Irix 5.3, the .reginfo section has an
|
||
entsize of 0x18. FIXME: Does this matter? */
|
||
if (SGI_COMPAT (abfd) && (abfd->flags & DYNAMIC) != 0)
|
||
hdr->sh_entsize = sizeof (Elf32_External_RegInfo);
|
||
else
|
||
hdr->sh_entsize = 1;
|
||
|
||
/* Force the section size to the correct value, even if the
|
||
linker thinks it is larger. The link routine below will only
|
||
write out this much data for .reginfo. */
|
||
hdr->sh_size = sec->_raw_size = sizeof (Elf32_External_RegInfo);
|
||
}
|
||
else if (SGI_COMPAT (abfd)
|
||
&& (strcmp (name, ".hash") == 0
|
||
|| strcmp (name, ".dynamic") == 0
|
||
|| strcmp (name, ".dynstr") == 0))
|
||
{
|
||
hdr->sh_entsize = 0;
|
||
hdr->sh_info = SIZEOF_MIPS_DYNSYM_SECNAMES;
|
||
}
|
||
else if (strcmp (name, ".got") == 0
|
||
|| strcmp (name, ".sdata") == 0
|
||
|| strcmp (name, ".sbss") == 0
|
||
|| strcmp (name, ".lit4") == 0
|
||
|| strcmp (name, ".lit8") == 0)
|
||
hdr->sh_flags |= SHF_MIPS_GPREL;
|
||
else if (strcmp (name, ".MIPS.interfaces") == 0)
|
||
{
|
||
hdr->sh_type = SHT_MIPS_IFACE;
|
||
hdr->sh_flags |= SHF_MIPS_NOSTRIP;
|
||
}
|
||
else if (strcmp (name, ".MIPS.content") == 0)
|
||
{
|
||
hdr->sh_type = SHT_MIPS_CONTENT;
|
||
/* The sh_info field is set in final_write_processing. */
|
||
}
|
||
else if (strcmp (name, ".options") == 0
|
||
|| strcmp (name, ".MIPS.options") == 0)
|
||
{
|
||
hdr->sh_type = SHT_MIPS_OPTIONS;
|
||
hdr->sh_entsize = 1;
|
||
hdr->sh_flags |= SHF_MIPS_NOSTRIP;
|
||
}
|
||
else if (strncmp (name, ".debug_", sizeof ".debug_" - 1) == 0)
|
||
hdr->sh_type = SHT_MIPS_DWARF;
|
||
else if (strcmp (name, ".MIPS.symlib") == 0)
|
||
{
|
||
hdr->sh_type = SHT_MIPS_SYMBOL_LIB;
|
||
/* The sh_link and sh_info fields are set in
|
||
final_write_processing. */
|
||
}
|
||
else if (strncmp (name, ".MIPS.events", sizeof ".MIPS.events" - 1) == 0
|
||
|| strncmp (name, ".MIPS.post_rel",
|
||
sizeof ".MIPS.post_rel" - 1) == 0)
|
||
{
|
||
hdr->sh_type = SHT_MIPS_EVENTS;
|
||
hdr->sh_flags |= SHF_MIPS_NOSTRIP;
|
||
/* The sh_link field is set in final_write_processing. */
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Given a BFD section, try to locate the corresponding ELF section
|
||
index. This is used by both the 32-bit and the 64-bit ABI.
|
||
Actually, it's not clear to me that the 64-bit ABI supports these,
|
||
but for non-PIC objects we will certainly want support for at least
|
||
the .scommon section. */
|
||
|
||
boolean
|
||
_bfd_mips_elf_section_from_bfd_section (abfd, hdr, sec, retval)
|
||
bfd *abfd;
|
||
Elf32_Internal_Shdr *hdr;
|
||
asection *sec;
|
||
int *retval;
|
||
{
|
||
if (strcmp (bfd_get_section_name (abfd, sec), ".scommon") == 0)
|
||
{
|
||
*retval = SHN_MIPS_SCOMMON;
|
||
return true;
|
||
}
|
||
if (strcmp (bfd_get_section_name (abfd, sec), ".acommon") == 0)
|
||
{
|
||
*retval = SHN_MIPS_ACOMMON;
|
||
return true;
|
||
}
|
||
return false;
|
||
}
|
||
|
||
/* When are writing out the .options or .MIPS.options section,
|
||
remember the bytes we are writing out, so that we can install the
|
||
GP value in the section_processing routine. */
|
||
|
||
boolean
|
||
_bfd_mips_elf_set_section_contents (abfd, section, location, offset, count)
|
||
bfd *abfd;
|
||
sec_ptr section;
|
||
PTR location;
|
||
file_ptr offset;
|
||
bfd_size_type count;
|
||
{
|
||
if (strcmp (section->name, ".options") == 0
|
||
|| strcmp (section->name, ".MIPS.options") == 0)
|
||
{
|
||
bfd_byte *c;
|
||
|
||
if (elf_section_data (section) == NULL)
|
||
{
|
||
section->used_by_bfd =
|
||
(PTR) bfd_zalloc (abfd, sizeof (struct bfd_elf_section_data));
|
||
if (elf_section_data (section) == NULL)
|
||
return false;
|
||
}
|
||
c = (bfd_byte *) elf_section_data (section)->tdata;
|
||
if (c == NULL)
|
||
{
|
||
bfd_size_type size;
|
||
|
||
if (section->_cooked_size != 0)
|
||
size = section->_cooked_size;
|
||
else
|
||
size = section->_raw_size;
|
||
c = (PTR) bfd_zalloc (abfd, size);
|
||
if (c == NULL)
|
||
return false;
|
||
elf_section_data (section)->tdata = (PTR) c;
|
||
}
|
||
|
||
memcpy (c + offset, location, count);
|
||
}
|
||
|
||
return _bfd_elf_set_section_contents (abfd, section, location, offset,
|
||
count);
|
||
}
|
||
|
||
/* Work over a section just before writing it out. This routine is
|
||
used by both the 32-bit and the 64-bit ABI. FIXME: We recognize
|
||
sections that need the SHF_MIPS_GPREL flag by name; there has to be
|
||
a better way. */
|
||
|
||
boolean
|
||
_bfd_mips_elf_section_processing (abfd, hdr)
|
||
bfd *abfd;
|
||
Elf_Internal_Shdr *hdr;
|
||
{
|
||
if (hdr->bfd_section != NULL)
|
||
{
|
||
const char *name = bfd_get_section_name (abfd, hdr->bfd_section);
|
||
|
||
if (strcmp (name, ".sdata") == 0)
|
||
{
|
||
hdr->sh_flags |= SHF_ALLOC | SHF_WRITE | SHF_MIPS_GPREL;
|
||
hdr->sh_type = SHT_PROGBITS;
|
||
}
|
||
else if (strcmp (name, ".sbss") == 0)
|
||
{
|
||
hdr->sh_flags |= SHF_ALLOC | SHF_WRITE | SHF_MIPS_GPREL;
|
||
hdr->sh_type = SHT_NOBITS;
|
||
}
|
||
else if (strcmp (name, ".lit8") == 0
|
||
|| strcmp (name, ".lit4") == 0)
|
||
{
|
||
hdr->sh_flags |= SHF_ALLOC | SHF_WRITE | SHF_MIPS_GPREL;
|
||
hdr->sh_type = SHT_PROGBITS;
|
||
}
|
||
else if (strcmp (name, ".compact_rel") == 0)
|
||
{
|
||
hdr->sh_flags = 0;
|
||
hdr->sh_type = SHT_PROGBITS;
|
||
}
|
||
else if (strcmp (name, ".rtproc") == 0)
|
||
{
|
||
if (hdr->sh_addralign != 0 && hdr->sh_entsize == 0)
|
||
{
|
||
unsigned int adjust;
|
||
|
||
adjust = hdr->sh_size % hdr->sh_addralign;
|
||
if (adjust != 0)
|
||
hdr->sh_size += hdr->sh_addralign - adjust;
|
||
}
|
||
}
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Work over a section just before writing it out. We update the GP
|
||
value in the SHT_MIPS_REGINFO and SHT_MIPS_OPTIONS sections based
|
||
on the value we are using. */
|
||
|
||
static boolean
|
||
mips_elf32_section_processing (abfd, hdr)
|
||
bfd *abfd;
|
||
Elf32_Internal_Shdr *hdr;
|
||
{
|
||
if (hdr->sh_type == SHT_MIPS_REGINFO)
|
||
{
|
||
bfd_byte buf[4];
|
||
|
||
BFD_ASSERT (hdr->sh_size == sizeof (Elf32_External_RegInfo));
|
||
BFD_ASSERT (hdr->contents == NULL);
|
||
|
||
if (bfd_seek (abfd,
|
||
hdr->sh_offset + sizeof (Elf32_External_RegInfo) - 4,
|
||
SEEK_SET) == -1)
|
||
return false;
|
||
bfd_h_put_32 (abfd, (bfd_vma) elf_gp (abfd), buf);
|
||
if (bfd_write (buf, (bfd_size_type) 1, (bfd_size_type) 4, abfd) != 4)
|
||
return false;
|
||
}
|
||
|
||
if (hdr->sh_type == SHT_MIPS_OPTIONS
|
||
&& hdr->bfd_section != NULL
|
||
&& elf_section_data (hdr->bfd_section) != NULL
|
||
&& elf_section_data (hdr->bfd_section)->tdata != NULL)
|
||
{
|
||
bfd_byte *contents, *l, *lend;
|
||
|
||
/* We stored the section contents in the elf_section_data tdata
|
||
field in the set_section_contents routine. We save the
|
||
section contents so that we don't have to read them again.
|
||
At this point we know that elf_gp is set, so we can look
|
||
through the section contents to see if there is an
|
||
ODK_REGINFO structure. */
|
||
|
||
contents = (bfd_byte *) elf_section_data (hdr->bfd_section)->tdata;
|
||
l = contents;
|
||
lend = contents + hdr->sh_size;
|
||
while (l + sizeof (Elf_External_Options) <= lend)
|
||
{
|
||
Elf_Internal_Options intopt;
|
||
|
||
bfd_mips_elf_swap_options_in (abfd, (Elf_External_Options *) l,
|
||
&intopt);
|
||
if (intopt.kind == ODK_REGINFO)
|
||
{
|
||
bfd_byte buf[4];
|
||
|
||
if (bfd_seek (abfd,
|
||
(hdr->sh_offset
|
||
+ (l - contents)
|
||
+ sizeof (Elf_External_Options)
|
||
+ (sizeof (Elf32_External_RegInfo) - 4)),
|
||
SEEK_SET) == -1)
|
||
return false;
|
||
bfd_h_put_32 (abfd, elf_gp (abfd), buf);
|
||
if (bfd_write (buf, 1, 4, abfd) != 4)
|
||
return false;
|
||
}
|
||
l += intopt.size;
|
||
}
|
||
}
|
||
|
||
return _bfd_mips_elf_section_processing (abfd, hdr);
|
||
}
|
||
|
||
/* MIPS ELF uses two common sections. One is the usual one, and the
|
||
other is for small objects. All the small objects are kept
|
||
together, and then referenced via the gp pointer, which yields
|
||
faster assembler code. This is what we use for the small common
|
||
section. This approach is copied from ecoff.c. */
|
||
static asection mips_elf_scom_section;
|
||
static asymbol mips_elf_scom_symbol;
|
||
static asymbol *mips_elf_scom_symbol_ptr;
|
||
|
||
/* MIPS ELF also uses an acommon section, which represents an
|
||
allocated common symbol which may be overridden by a
|
||
definition in a shared library. */
|
||
static asection mips_elf_acom_section;
|
||
static asymbol mips_elf_acom_symbol;
|
||
static asymbol *mips_elf_acom_symbol_ptr;
|
||
|
||
/* The Irix 5 support uses two virtual sections, which represent
|
||
text/data symbols defined in dynamic objects. */
|
||
static asection mips_elf_text_section;
|
||
static asection *mips_elf_text_section_ptr;
|
||
static asymbol mips_elf_text_symbol;
|
||
static asymbol *mips_elf_text_symbol_ptr;
|
||
|
||
static asection mips_elf_data_section;
|
||
static asection *mips_elf_data_section_ptr;
|
||
static asymbol mips_elf_data_symbol;
|
||
static asymbol *mips_elf_data_symbol_ptr;
|
||
|
||
/* Handle the special MIPS section numbers that a symbol may use.
|
||
This is used for both the 32-bit and the 64-bit ABI. */
|
||
|
||
void
|
||
_bfd_mips_elf_symbol_processing (abfd, asym)
|
||
bfd *abfd;
|
||
asymbol *asym;
|
||
{
|
||
elf_symbol_type *elfsym;
|
||
|
||
elfsym = (elf_symbol_type *) asym;
|
||
switch (elfsym->internal_elf_sym.st_shndx)
|
||
{
|
||
case SHN_MIPS_ACOMMON:
|
||
/* This section is used in a dynamically linked executable file.
|
||
It is an allocated common section. The dynamic linker can
|
||
either resolve these symbols to something in a shared
|
||
library, or it can just leave them here. For our purposes,
|
||
we can consider these symbols to be in a new section. */
|
||
if (mips_elf_acom_section.name == NULL)
|
||
{
|
||
/* Initialize the acommon section. */
|
||
mips_elf_acom_section.name = ".acommon";
|
||
mips_elf_acom_section.flags = SEC_ALLOC;
|
||
mips_elf_acom_section.output_section = &mips_elf_acom_section;
|
||
mips_elf_acom_section.symbol = &mips_elf_acom_symbol;
|
||
mips_elf_acom_section.symbol_ptr_ptr = &mips_elf_acom_symbol_ptr;
|
||
mips_elf_acom_symbol.name = ".acommon";
|
||
mips_elf_acom_symbol.flags = BSF_SECTION_SYM;
|
||
mips_elf_acom_symbol.section = &mips_elf_acom_section;
|
||
mips_elf_acom_symbol_ptr = &mips_elf_acom_symbol;
|
||
}
|
||
asym->section = &mips_elf_acom_section;
|
||
break;
|
||
|
||
case SHN_COMMON:
|
||
/* Common symbols less than the GP size are automatically
|
||
treated as SHN_MIPS_SCOMMON symbols. */
|
||
if (asym->value > elf_gp_size (abfd))
|
||
break;
|
||
/* Fall through. */
|
||
case SHN_MIPS_SCOMMON:
|
||
if (mips_elf_scom_section.name == NULL)
|
||
{
|
||
/* Initialize the small common section. */
|
||
mips_elf_scom_section.name = ".scommon";
|
||
mips_elf_scom_section.flags = SEC_IS_COMMON;
|
||
mips_elf_scom_section.output_section = &mips_elf_scom_section;
|
||
mips_elf_scom_section.symbol = &mips_elf_scom_symbol;
|
||
mips_elf_scom_section.symbol_ptr_ptr = &mips_elf_scom_symbol_ptr;
|
||
mips_elf_scom_symbol.name = ".scommon";
|
||
mips_elf_scom_symbol.flags = BSF_SECTION_SYM;
|
||
mips_elf_scom_symbol.section = &mips_elf_scom_section;
|
||
mips_elf_scom_symbol_ptr = &mips_elf_scom_symbol;
|
||
}
|
||
asym->section = &mips_elf_scom_section;
|
||
asym->value = elfsym->internal_elf_sym.st_size;
|
||
break;
|
||
|
||
case SHN_MIPS_SUNDEFINED:
|
||
asym->section = bfd_und_section_ptr;
|
||
break;
|
||
|
||
#if 0 /* for SGI_COMPAT */
|
||
case SHN_MIPS_TEXT:
|
||
asym->section = mips_elf_text_section_ptr;
|
||
break;
|
||
|
||
case SHN_MIPS_DATA:
|
||
asym->section = mips_elf_data_section_ptr;
|
||
break;
|
||
#endif
|
||
}
|
||
}
|
||
|
||
/* When creating an Irix 5 executable, we need REGINFO and RTPROC
|
||
segments. */
|
||
|
||
static int
|
||
mips_elf_additional_program_headers (abfd)
|
||
bfd *abfd;
|
||
{
|
||
asection *s;
|
||
int ret;
|
||
|
||
ret = 0;
|
||
|
||
if (! SGI_COMPAT (abfd))
|
||
return ret;
|
||
|
||
s = bfd_get_section_by_name (abfd, ".reginfo");
|
||
if (s != NULL && (s->flags & SEC_LOAD) != 0)
|
||
{
|
||
/* We need a PT_MIPS_REGINFO segment. */
|
||
++ret;
|
||
}
|
||
|
||
if (bfd_get_section_by_name (abfd, ".dynamic") != NULL
|
||
&& bfd_get_section_by_name (abfd, ".mdebug") != NULL)
|
||
{
|
||
/* We need a PT_MIPS_RTPROC segment. */
|
||
++ret;
|
||
}
|
||
|
||
return ret;
|
||
}
|
||
|
||
/* Modify the segment map for an Irix 5 executable. */
|
||
|
||
static boolean
|
||
mips_elf_modify_segment_map (abfd)
|
||
bfd *abfd;
|
||
{
|
||
asection *s;
|
||
struct elf_segment_map *m, **pm;
|
||
|
||
if (! SGI_COMPAT (abfd))
|
||
return true;
|
||
|
||
/* If there is a .reginfo section, we need a PT_MIPS_REGINFO
|
||
segment. */
|
||
s = bfd_get_section_by_name (abfd, ".reginfo");
|
||
if (s != NULL && (s->flags & SEC_LOAD) != 0)
|
||
{
|
||
for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
|
||
if (m->p_type == PT_MIPS_REGINFO)
|
||
break;
|
||
if (m == NULL)
|
||
{
|
||
m = (struct elf_segment_map *) bfd_zalloc (abfd, sizeof *m);
|
||
if (m == NULL)
|
||
return false;
|
||
|
||
m->p_type = PT_MIPS_REGINFO;
|
||
m->count = 1;
|
||
m->sections[0] = s;
|
||
|
||
/* We want to put it after the PHDR and INTERP segments. */
|
||
pm = &elf_tdata (abfd)->segment_map;
|
||
while (*pm != NULL
|
||
&& ((*pm)->p_type == PT_PHDR
|
||
|| (*pm)->p_type == PT_INTERP))
|
||
pm = &(*pm)->next;
|
||
|
||
m->next = *pm;
|
||
*pm = m;
|
||
}
|
||
}
|
||
|
||
/* If there are .dynamic and .mdebug sections, we make a room for
|
||
the RTPROC header. FIXME: Rewrite without section names. */
|
||
if (bfd_get_section_by_name (abfd, ".interp") == NULL
|
||
&& bfd_get_section_by_name (abfd, ".dynamic") != NULL
|
||
&& bfd_get_section_by_name (abfd, ".mdebug") != NULL)
|
||
{
|
||
for (m = elf_tdata (abfd)->segment_map; m != NULL; m = m->next)
|
||
if (m->p_type == PT_MIPS_RTPROC)
|
||
break;
|
||
if (m == NULL)
|
||
{
|
||
m = (struct elf_segment_map *) bfd_zalloc (abfd, sizeof *m);
|
||
if (m == NULL)
|
||
return false;
|
||
|
||
m->p_type = PT_MIPS_RTPROC;
|
||
|
||
s = bfd_get_section_by_name (abfd, ".rtproc");
|
||
if (s == NULL)
|
||
{
|
||
m->count = 0;
|
||
m->p_flags = 0;
|
||
m->p_flags_valid = 1;
|
||
}
|
||
else
|
||
{
|
||
m->count = 1;
|
||
m->sections[0] = s;
|
||
}
|
||
|
||
/* We want to put it after the DYNAMIC segment. */
|
||
pm = &elf_tdata (abfd)->segment_map;
|
||
while (*pm != NULL && (*pm)->p_type != PT_DYNAMIC)
|
||
pm = &(*pm)->next;
|
||
if (*pm != NULL)
|
||
pm = &(*pm)->next;
|
||
|
||
m->next = *pm;
|
||
*pm = m;
|
||
}
|
||
}
|
||
|
||
/* On Irix 5, the PT_DYNAMIC segment includes the .dynamic, .dynstr,
|
||
.dynsym, and .hash sections, and everything in between. */
|
||
for (pm = &elf_tdata (abfd)->segment_map; *pm != NULL; pm = &(*pm)->next)
|
||
if ((*pm)->p_type == PT_DYNAMIC)
|
||
break;
|
||
m = *pm;
|
||
if (m != NULL
|
||
&& m->count == 1
|
||
&& strcmp (m->sections[0]->name, ".dynamic") == 0)
|
||
{
|
||
static const char *sec_names[] =
|
||
{ ".dynamic", ".dynstr", ".dynsym", ".hash" };
|
||
bfd_vma low, high;
|
||
unsigned int i, c;
|
||
struct elf_segment_map *n;
|
||
|
||
low = 0xffffffff;
|
||
high = 0;
|
||
for (i = 0; i < sizeof sec_names / sizeof sec_names[0]; i++)
|
||
{
|
||
s = bfd_get_section_by_name (abfd, sec_names[i]);
|
||
if (s != NULL && (s->flags & SEC_LOAD) != 0)
|
||
{
|
||
bfd_size_type sz;
|
||
|
||
if (low > s->vma)
|
||
low = s->vma;
|
||
sz = s->_cooked_size;
|
||
if (sz == 0)
|
||
sz = s->_raw_size;
|
||
if (high < s->vma + sz)
|
||
high = s->vma + sz;
|
||
}
|
||
}
|
||
|
||
c = 0;
|
||
for (s = abfd->sections; s != NULL; s = s->next)
|
||
if ((s->flags & SEC_LOAD) != 0
|
||
&& s->vma >= low
|
||
&& ((s->vma
|
||
+ (s->_cooked_size != 0 ? s->_cooked_size : s->_raw_size))
|
||
<= high))
|
||
++c;
|
||
|
||
n = ((struct elf_segment_map *)
|
||
bfd_zalloc (abfd, sizeof *n + (c - 1) * sizeof (asection *)));
|
||
if (n == NULL)
|
||
return false;
|
||
*n = *m;
|
||
n->count = c;
|
||
|
||
i = 0;
|
||
for (s = abfd->sections; s != NULL; s = s->next)
|
||
{
|
||
if ((s->flags & SEC_LOAD) != 0
|
||
&& s->vma >= low
|
||
&& ((s->vma
|
||
+ (s->_cooked_size != 0 ? s->_cooked_size : s->_raw_size))
|
||
<= high))
|
||
{
|
||
n->sections[i] = s;
|
||
++i;
|
||
}
|
||
}
|
||
|
||
*pm = n;
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* The structure of the runtime procedure descriptor created by the
|
||
loader for use by the static exception system. */
|
||
|
||
typedef struct runtime_pdr {
|
||
bfd_vma adr; /* memory address of start of procedure */
|
||
long regmask; /* save register mask */
|
||
long regoffset; /* save register offset */
|
||
long fregmask; /* save floating point register mask */
|
||
long fregoffset; /* save floating point register offset */
|
||
long frameoffset; /* frame size */
|
||
short framereg; /* frame pointer register */
|
||
short pcreg; /* offset or reg of return pc */
|
||
long irpss; /* index into the runtime string table */
|
||
long reserved;
|
||
struct exception_info *exception_info;/* pointer to exception array */
|
||
} RPDR, *pRPDR;
|
||
#define cbRPDR sizeof(RPDR)
|
||
#define rpdNil ((pRPDR) 0)
|
||
|
||
/* Swap RPDR (runtime procedure table entry) for output. */
|
||
|
||
static void ecoff_swap_rpdr_out
|
||
PARAMS ((bfd *, const RPDR *, struct rpdr_ext *));
|
||
|
||
static void
|
||
ecoff_swap_rpdr_out (abfd, in, ex)
|
||
bfd *abfd;
|
||
const RPDR *in;
|
||
struct rpdr_ext *ex;
|
||
{
|
||
/* ecoff_put_off was defined in ecoffswap.h. */
|
||
ecoff_put_off (abfd, in->adr, (bfd_byte *) ex->p_adr);
|
||
bfd_h_put_32 (abfd, in->regmask, (bfd_byte *) ex->p_regmask);
|
||
bfd_h_put_32 (abfd, in->regoffset, (bfd_byte *) ex->p_regoffset);
|
||
bfd_h_put_32 (abfd, in->fregmask, (bfd_byte *) ex->p_fregmask);
|
||
bfd_h_put_32 (abfd, in->fregoffset, (bfd_byte *) ex->p_fregoffset);
|
||
bfd_h_put_32 (abfd, in->frameoffset, (bfd_byte *) ex->p_frameoffset);
|
||
|
||
bfd_h_put_16 (abfd, in->framereg, (bfd_byte *) ex->p_framereg);
|
||
bfd_h_put_16 (abfd, in->pcreg, (bfd_byte *) ex->p_pcreg);
|
||
|
||
bfd_h_put_32 (abfd, in->irpss, (bfd_byte *) ex->p_irpss);
|
||
#if 0 /* FIXME */
|
||
ecoff_put_off (abfd, in->exception_info, (bfd_byte *) ex->p_exception_info);
|
||
#endif
|
||
}
|
||
|
||
/* Read ECOFF debugging information from a .mdebug section into a
|
||
ecoff_debug_info structure. */
|
||
|
||
boolean
|
||
_bfd_mips_elf_read_ecoff_info (abfd, section, debug)
|
||
bfd *abfd;
|
||
asection *section;
|
||
struct ecoff_debug_info *debug;
|
||
{
|
||
HDRR *symhdr;
|
||
const struct ecoff_debug_swap *swap;
|
||
char *ext_hdr = NULL;
|
||
|
||
swap = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap;
|
||
|
||
ext_hdr = (char *) bfd_malloc ((size_t) swap->external_hdr_size);
|
||
if (ext_hdr == NULL && swap->external_hdr_size != 0)
|
||
goto error_return;
|
||
|
||
if (bfd_get_section_contents (abfd, section, ext_hdr, (file_ptr) 0,
|
||
swap->external_hdr_size)
|
||
== false)
|
||
goto error_return;
|
||
|
||
symhdr = &debug->symbolic_header;
|
||
(*swap->swap_hdr_in) (abfd, ext_hdr, symhdr);
|
||
|
||
/* The symbolic header contains absolute file offsets and sizes to
|
||
read. */
|
||
#define READ(ptr, offset, count, size, type) \
|
||
if (symhdr->count == 0) \
|
||
debug->ptr = NULL; \
|
||
else \
|
||
{ \
|
||
debug->ptr = (type) bfd_malloc ((size_t) (size * symhdr->count)); \
|
||
if (debug->ptr == NULL) \
|
||
goto error_return; \
|
||
if (bfd_seek (abfd, (file_ptr) symhdr->offset, SEEK_SET) != 0 \
|
||
|| (bfd_read (debug->ptr, size, symhdr->count, \
|
||
abfd) != size * symhdr->count)) \
|
||
goto error_return; \
|
||
}
|
||
|
||
READ (line, cbLineOffset, cbLine, sizeof (unsigned char), unsigned char *);
|
||
READ (external_dnr, cbDnOffset, idnMax, swap->external_dnr_size, PTR);
|
||
READ (external_pdr, cbPdOffset, ipdMax, swap->external_pdr_size, PTR);
|
||
READ (external_sym, cbSymOffset, isymMax, swap->external_sym_size, PTR);
|
||
READ (external_opt, cbOptOffset, ioptMax, swap->external_opt_size, PTR);
|
||
READ (external_aux, cbAuxOffset, iauxMax, sizeof (union aux_ext),
|
||
union aux_ext *);
|
||
READ (ss, cbSsOffset, issMax, sizeof (char), char *);
|
||
READ (ssext, cbSsExtOffset, issExtMax, sizeof (char), char *);
|
||
READ (external_fdr, cbFdOffset, ifdMax, swap->external_fdr_size, PTR);
|
||
READ (external_rfd, cbRfdOffset, crfd, swap->external_rfd_size, PTR);
|
||
READ (external_ext, cbExtOffset, iextMax, swap->external_ext_size, PTR);
|
||
#undef READ
|
||
|
||
debug->fdr = NULL;
|
||
debug->adjust = NULL;
|
||
|
||
return true;
|
||
|
||
error_return:
|
||
if (ext_hdr != NULL)
|
||
free (ext_hdr);
|
||
if (debug->line != NULL)
|
||
free (debug->line);
|
||
if (debug->external_dnr != NULL)
|
||
free (debug->external_dnr);
|
||
if (debug->external_pdr != NULL)
|
||
free (debug->external_pdr);
|
||
if (debug->external_sym != NULL)
|
||
free (debug->external_sym);
|
||
if (debug->external_opt != NULL)
|
||
free (debug->external_opt);
|
||
if (debug->external_aux != NULL)
|
||
free (debug->external_aux);
|
||
if (debug->ss != NULL)
|
||
free (debug->ss);
|
||
if (debug->ssext != NULL)
|
||
free (debug->ssext);
|
||
if (debug->external_fdr != NULL)
|
||
free (debug->external_fdr);
|
||
if (debug->external_rfd != NULL)
|
||
free (debug->external_rfd);
|
||
if (debug->external_ext != NULL)
|
||
free (debug->external_ext);
|
||
return false;
|
||
}
|
||
|
||
/* MIPS ELF local labels start with '$', not 'L'. */
|
||
|
||
/*ARGSUSED*/
|
||
static boolean
|
||
mips_elf_is_local_label (abfd, symbol)
|
||
bfd *abfd;
|
||
asymbol *symbol;
|
||
{
|
||
return symbol->name[0] == '$';
|
||
}
|
||
|
||
/* MIPS ELF uses a special find_nearest_line routine in order the
|
||
handle the ECOFF debugging information. */
|
||
|
||
struct mips_elf_find_line
|
||
{
|
||
struct ecoff_debug_info d;
|
||
struct ecoff_find_line i;
|
||
};
|
||
|
||
boolean
|
||
_bfd_mips_elf_find_nearest_line (abfd, section, symbols, offset, filename_ptr,
|
||
functionname_ptr, line_ptr)
|
||
bfd *abfd;
|
||
asection *section;
|
||
asymbol **symbols;
|
||
bfd_vma offset;
|
||
const char **filename_ptr;
|
||
const char **functionname_ptr;
|
||
unsigned int *line_ptr;
|
||
{
|
||
asection *msec;
|
||
|
||
msec = bfd_get_section_by_name (abfd, ".mdebug");
|
||
if (msec != NULL)
|
||
{
|
||
flagword origflags;
|
||
struct mips_elf_find_line *fi;
|
||
const struct ecoff_debug_swap * const swap =
|
||
get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap;
|
||
|
||
/* If we are called during a link, mips_elf_final_link may have
|
||
cleared the SEC_HAS_CONTENTS field. We force it back on here
|
||
if appropriate (which it normally will be). */
|
||
origflags = msec->flags;
|
||
if (elf_section_data (msec)->this_hdr.sh_type != SHT_NOBITS)
|
||
msec->flags |= SEC_HAS_CONTENTS;
|
||
|
||
fi = elf_tdata (abfd)->find_line_info;
|
||
if (fi == NULL)
|
||
{
|
||
bfd_size_type external_fdr_size;
|
||
char *fraw_src;
|
||
char *fraw_end;
|
||
struct fdr *fdr_ptr;
|
||
|
||
fi = ((struct mips_elf_find_line *)
|
||
bfd_zalloc (abfd, sizeof (struct mips_elf_find_line)));
|
||
if (fi == NULL)
|
||
{
|
||
msec->flags = origflags;
|
||
return false;
|
||
}
|
||
|
||
if (! _bfd_mips_elf_read_ecoff_info (abfd, msec, &fi->d))
|
||
{
|
||
msec->flags = origflags;
|
||
return false;
|
||
}
|
||
|
||
/* Swap in the FDR information. */
|
||
fi->d.fdr = ((struct fdr *)
|
||
bfd_alloc (abfd,
|
||
(fi->d.symbolic_header.ifdMax *
|
||
sizeof (struct fdr))));
|
||
if (fi->d.fdr == NULL)
|
||
{
|
||
msec->flags = origflags;
|
||
return false;
|
||
}
|
||
external_fdr_size = swap->external_fdr_size;
|
||
fdr_ptr = fi->d.fdr;
|
||
fraw_src = (char *) fi->d.external_fdr;
|
||
fraw_end = (fraw_src
|
||
+ fi->d.symbolic_header.ifdMax * external_fdr_size);
|
||
for (; fraw_src < fraw_end; fraw_src += external_fdr_size, fdr_ptr++)
|
||
(*swap->swap_fdr_in) (abfd, (PTR) fraw_src, fdr_ptr);
|
||
|
||
elf_tdata (abfd)->find_line_info = fi;
|
||
|
||
/* Note that we don't bother to ever free this information.
|
||
find_nearest_line is either called all the time, as in
|
||
objdump -l, so the information should be saved, or it is
|
||
rarely called, as in ld error messages, so the memory
|
||
wasted is unimportant. Still, it would probably be a
|
||
good idea for free_cached_info to throw it away. */
|
||
}
|
||
|
||
if (_bfd_ecoff_locate_line (abfd, section, offset, &fi->d, swap,
|
||
&fi->i, filename_ptr, functionname_ptr,
|
||
line_ptr))
|
||
{
|
||
msec->flags = origflags;
|
||
return true;
|
||
}
|
||
|
||
msec->flags = origflags;
|
||
}
|
||
|
||
/* Fall back on the generic ELF find_nearest_line routine. */
|
||
|
||
return _bfd_elf_find_nearest_line (abfd, section, symbols, offset,
|
||
filename_ptr, functionname_ptr,
|
||
line_ptr);
|
||
}
|
||
|
||
/* The MIPS ELF linker needs additional information for each symbol in
|
||
the global hash table. */
|
||
|
||
struct mips_elf_link_hash_entry
|
||
{
|
||
struct elf_link_hash_entry root;
|
||
|
||
/* External symbol information. */
|
||
EXTR esym;
|
||
|
||
/* Number of MIPS_32 or MIPS_REL32 relocs against this symbol. */
|
||
unsigned int mips_32_relocs;
|
||
};
|
||
|
||
/* MIPS ELF linker hash table. */
|
||
|
||
struct mips_elf_link_hash_table
|
||
{
|
||
struct elf_link_hash_table root;
|
||
/* String section indices for the dynamic section symbols. */
|
||
bfd_size_type dynsym_sec_strindex[SIZEOF_MIPS_DYNSYM_SECNAMES];
|
||
/* The number of .rtproc entries. */
|
||
bfd_size_type procedure_count;
|
||
/* The size of the .compact_rel section (if SGI_COMPAT). */
|
||
bfd_size_type compact_rel_size;
|
||
/* This flag indicates that the value of DT_MIPS_RLD_MAP dynamic
|
||
entry is set to the address of __rld_obj_head as in Irix 5. */
|
||
boolean use_rld_obj_head;
|
||
/* This is the value of the __rld_map or __rld_obj_head symbol. */
|
||
bfd_vma rld_value;
|
||
};
|
||
|
||
/* Look up an entry in a MIPS ELF linker hash table. */
|
||
|
||
#define mips_elf_link_hash_lookup(table, string, create, copy, follow) \
|
||
((struct mips_elf_link_hash_entry *) \
|
||
elf_link_hash_lookup (&(table)->root, (string), (create), \
|
||
(copy), (follow)))
|
||
|
||
/* Traverse a MIPS ELF linker hash table. */
|
||
|
||
#define mips_elf_link_hash_traverse(table, func, info) \
|
||
(elf_link_hash_traverse \
|
||
(&(table)->root, \
|
||
(boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \
|
||
(info)))
|
||
|
||
/* Get the MIPS ELF linker hash table from a link_info structure. */
|
||
|
||
#define mips_elf_hash_table(p) \
|
||
((struct mips_elf_link_hash_table *) ((p)->hash))
|
||
|
||
static boolean mips_elf_output_extsym
|
||
PARAMS ((struct mips_elf_link_hash_entry *, PTR));
|
||
|
||
/* Create an entry in a MIPS ELF linker hash table. */
|
||
|
||
static struct bfd_hash_entry *
|
||
mips_elf_link_hash_newfunc (entry, table, string)
|
||
struct bfd_hash_entry *entry;
|
||
struct bfd_hash_table *table;
|
||
const char *string;
|
||
{
|
||
struct mips_elf_link_hash_entry *ret =
|
||
(struct mips_elf_link_hash_entry *) entry;
|
||
|
||
/* Allocate the structure if it has not already been allocated by a
|
||
subclass. */
|
||
if (ret == (struct mips_elf_link_hash_entry *) NULL)
|
||
ret = ((struct mips_elf_link_hash_entry *)
|
||
bfd_hash_allocate (table,
|
||
sizeof (struct mips_elf_link_hash_entry)));
|
||
if (ret == (struct mips_elf_link_hash_entry *) NULL)
|
||
return (struct bfd_hash_entry *) ret;
|
||
|
||
/* Call the allocation method of the superclass. */
|
||
ret = ((struct mips_elf_link_hash_entry *)
|
||
_bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
|
||
table, string));
|
||
if (ret != (struct mips_elf_link_hash_entry *) NULL)
|
||
{
|
||
/* Set local fields. */
|
||
memset (&ret->esym, 0, sizeof (EXTR));
|
||
/* We use -2 as a marker to indicate that the information has
|
||
not been set. -1 means there is no associated ifd. */
|
||
ret->esym.ifd = -2;
|
||
ret->mips_32_relocs = 0;
|
||
}
|
||
|
||
return (struct bfd_hash_entry *) ret;
|
||
}
|
||
|
||
/* Create a MIPS ELF linker hash table. */
|
||
|
||
static struct bfd_link_hash_table *
|
||
mips_elf_link_hash_table_create (abfd)
|
||
bfd *abfd;
|
||
{
|
||
struct mips_elf_link_hash_table *ret;
|
||
unsigned int i;
|
||
|
||
ret = ((struct mips_elf_link_hash_table *)
|
||
bfd_alloc (abfd, sizeof (struct mips_elf_link_hash_table)));
|
||
if (ret == (struct mips_elf_link_hash_table *) NULL)
|
||
return NULL;
|
||
|
||
if (! _bfd_elf_link_hash_table_init (&ret->root, abfd,
|
||
mips_elf_link_hash_newfunc))
|
||
{
|
||
bfd_release (abfd, ret);
|
||
return NULL;
|
||
}
|
||
|
||
for (i = 0; i < SIZEOF_MIPS_DYNSYM_SECNAMES; i++)
|
||
ret->dynsym_sec_strindex[i] = (bfd_size_type) -1;
|
||
ret->procedure_count = 0;
|
||
ret->compact_rel_size = 0;
|
||
ret->use_rld_obj_head = false;
|
||
ret->rld_value = 0;
|
||
|
||
return &ret->root.root;
|
||
}
|
||
|
||
/* Hook called by the linker routine which adds symbols from an object
|
||
file. We must handle the special MIPS section numbers here. */
|
||
|
||
/*ARGSUSED*/
|
||
static boolean
|
||
mips_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp)
|
||
bfd *abfd;
|
||
struct bfd_link_info *info;
|
||
const Elf_Internal_Sym *sym;
|
||
const char **namep;
|
||
flagword *flagsp;
|
||
asection **secp;
|
||
bfd_vma *valp;
|
||
{
|
||
if (SGI_COMPAT (abfd)
|
||
&& (abfd->flags & DYNAMIC) != 0
|
||
&& strcmp (*namep, "_rld_new_interface") == 0)
|
||
{
|
||
/* Skip Irix 5 rld entry name. */
|
||
*namep = NULL;
|
||
return true;
|
||
}
|
||
|
||
switch (sym->st_shndx)
|
||
{
|
||
case SHN_COMMON:
|
||
/* Common symbols less than the GP size are automatically
|
||
treated as SHN_MIPS_SCOMMON symbols. */
|
||
if (sym->st_size > elf_gp_size (abfd))
|
||
break;
|
||
/* Fall through. */
|
||
case SHN_MIPS_SCOMMON:
|
||
*secp = bfd_make_section_old_way (abfd, ".scommon");
|
||
(*secp)->flags |= SEC_IS_COMMON;
|
||
*valp = sym->st_size;
|
||
break;
|
||
|
||
case SHN_MIPS_TEXT:
|
||
/* This section is used in a shared object. */
|
||
if (mips_elf_text_section_ptr == NULL)
|
||
{
|
||
/* Initialize the section. */
|
||
mips_elf_text_section.name = ".text";
|
||
mips_elf_text_section.flags = SEC_NO_FLAGS;
|
||
mips_elf_text_section.output_section = NULL;
|
||
mips_elf_text_section.owner = abfd;
|
||
mips_elf_text_section.symbol = &mips_elf_text_symbol;
|
||
mips_elf_text_section.symbol_ptr_ptr = &mips_elf_text_symbol_ptr;
|
||
mips_elf_text_symbol.name = ".text";
|
||
mips_elf_text_symbol.flags = BSF_SECTION_SYM;
|
||
mips_elf_text_symbol.section = &mips_elf_text_section;
|
||
mips_elf_text_symbol_ptr = &mips_elf_text_symbol;
|
||
mips_elf_text_section_ptr = &mips_elf_text_section;
|
||
}
|
||
if (info->shared)
|
||
*secp = bfd_und_section_ptr;
|
||
else
|
||
*secp = mips_elf_text_section_ptr;
|
||
break;
|
||
|
||
case SHN_MIPS_ACOMMON:
|
||
/* Fall through. XXX Can we treat this as allocated data? */
|
||
case SHN_MIPS_DATA:
|
||
/* This section is used in a shared object. */
|
||
if (mips_elf_data_section_ptr == NULL)
|
||
{
|
||
/* Initialize the section. */
|
||
mips_elf_data_section.name = ".data";
|
||
mips_elf_data_section.flags = SEC_NO_FLAGS;
|
||
mips_elf_data_section.output_section = NULL;
|
||
mips_elf_data_section.owner = abfd;
|
||
mips_elf_data_section.symbol = &mips_elf_data_symbol;
|
||
mips_elf_data_section.symbol_ptr_ptr = &mips_elf_data_symbol_ptr;
|
||
mips_elf_data_symbol.name = ".data";
|
||
mips_elf_data_symbol.flags = BSF_SECTION_SYM;
|
||
mips_elf_data_symbol.section = &mips_elf_data_section;
|
||
mips_elf_data_symbol_ptr = &mips_elf_data_symbol;
|
||
mips_elf_data_section_ptr = &mips_elf_data_section;
|
||
}
|
||
if (info->shared)
|
||
*secp = bfd_und_section_ptr;
|
||
else
|
||
*secp = mips_elf_data_section_ptr;
|
||
break;
|
||
|
||
case SHN_MIPS_SUNDEFINED:
|
||
*secp = bfd_und_section_ptr;
|
||
break;
|
||
}
|
||
|
||
if (SGI_COMPAT (abfd)
|
||
&& ! info->shared
|
||
&& info->hash->creator == abfd->xvec
|
||
&& strcmp (*namep, "__rld_obj_head") == 0)
|
||
{
|
||
struct elf_link_hash_entry *h;
|
||
|
||
/* Mark __rld_obj_head as dynamic. */
|
||
h = NULL;
|
||
if (! (_bfd_generic_link_add_one_symbol
|
||
(info, abfd, *namep, BSF_GLOBAL, *secp,
|
||
(bfd_vma) *valp, (const char *) NULL, false,
|
||
get_elf_backend_data (abfd)->collect,
|
||
(struct bfd_link_hash_entry **) &h)))
|
||
return false;
|
||
h->elf_link_hash_flags &=~ ELF_LINK_NON_ELF;
|
||
h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
|
||
h->type = STT_OBJECT;
|
||
|
||
if (! bfd_elf32_link_record_dynamic_symbol (info, h))
|
||
return false;
|
||
|
||
mips_elf_hash_table (info)->use_rld_obj_head = true;
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Structure used to pass information to mips_elf_output_extsym. */
|
||
|
||
struct extsym_info
|
||
{
|
||
bfd *abfd;
|
||
struct bfd_link_info *info;
|
||
struct ecoff_debug_info *debug;
|
||
const struct ecoff_debug_swap *swap;
|
||
boolean failed;
|
||
};
|
||
|
||
/* This routine is used to write out ECOFF debugging external symbol
|
||
information. It is called via mips_elf_link_hash_traverse. The
|
||
ECOFF external symbol information must match the ELF external
|
||
symbol information. Unfortunately, at this point we don't know
|
||
whether a symbol is required by reloc information, so the two
|
||
tables may wind up being different. We must sort out the external
|
||
symbol information before we can set the final size of the .mdebug
|
||
section, and we must set the size of the .mdebug section before we
|
||
can relocate any sections, and we can't know which symbols are
|
||
required by relocation until we relocate the sections.
|
||
Fortunately, it is relatively unlikely that any symbol will be
|
||
stripped but required by a reloc. In particular, it can not happen
|
||
when generating a final executable. */
|
||
|
||
static boolean
|
||
mips_elf_output_extsym (h, data)
|
||
struct mips_elf_link_hash_entry *h;
|
||
PTR data;
|
||
{
|
||
struct extsym_info *einfo = (struct extsym_info *) data;
|
||
boolean strip;
|
||
asection *sec, *output_section;
|
||
|
||
if (h->root.indx == -2)
|
||
strip = false;
|
||
else if (((h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
|
||
|| (h->root.elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0)
|
||
&& (h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
|
||
&& (h->root.elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0)
|
||
strip = true;
|
||
else if (einfo->info->strip == strip_all
|
||
|| (einfo->info->strip == strip_some
|
||
&& bfd_hash_lookup (einfo->info->keep_hash,
|
||
h->root.root.root.string,
|
||
false, false) == NULL))
|
||
strip = true;
|
||
else
|
||
strip = false;
|
||
|
||
if (strip)
|
||
return true;
|
||
|
||
if (h->esym.ifd == -2)
|
||
{
|
||
h->esym.jmptbl = 0;
|
||
h->esym.cobol_main = 0;
|
||
h->esym.weakext = 0;
|
||
h->esym.reserved = 0;
|
||
h->esym.ifd = ifdNil;
|
||
h->esym.asym.value = 0;
|
||
h->esym.asym.st = stGlobal;
|
||
|
||
if (SGI_COMPAT (einfo->abfd)
|
||
&& (h->root.root.type == bfd_link_hash_undefined
|
||
|| h->root.root.type == bfd_link_hash_undefweak))
|
||
{
|
||
const char *name;
|
||
|
||
/* Use undefined class. Also, set class and type for some
|
||
special symbols. */
|
||
name = h->root.root.root.string;
|
||
if (strcmp (name, mips_elf_dynsym_rtproc_names[0]) == 0
|
||
|| strcmp (name, mips_elf_dynsym_rtproc_names[1]) == 0)
|
||
{
|
||
h->esym.asym.sc = scData;
|
||
h->esym.asym.st = stLabel;
|
||
h->esym.asym.value = 0;
|
||
}
|
||
else if (strcmp (name, mips_elf_dynsym_rtproc_names[2]) == 0)
|
||
{
|
||
h->esym.asym.sc = scAbs;
|
||
h->esym.asym.st = stLabel;
|
||
h->esym.asym.value =
|
||
mips_elf_hash_table (einfo->info)->procedure_count;
|
||
}
|
||
else if (strcmp (name, "_gp_disp") == 0)
|
||
{
|
||
h->esym.asym.sc = scAbs;
|
||
h->esym.asym.st = stLabel;
|
||
h->esym.asym.value = elf_gp (einfo->abfd);
|
||
}
|
||
else
|
||
h->esym.asym.sc = scUndefined;
|
||
}
|
||
else if (h->root.root.type != bfd_link_hash_defined
|
||
&& h->root.root.type != bfd_link_hash_defweak)
|
||
h->esym.asym.sc = scAbs;
|
||
else
|
||
{
|
||
const char *name;
|
||
|
||
sec = h->root.root.u.def.section;
|
||
output_section = sec->output_section;
|
||
|
||
/* When making a shared library and symbol h is the one from
|
||
the another shared library, OUTPUT_SECTION may be null. */
|
||
if (output_section == NULL)
|
||
h->esym.asym.sc = scUndefined;
|
||
else
|
||
{
|
||
name = bfd_section_name (output_section->owner, output_section);
|
||
|
||
if (strcmp (name, ".text") == 0)
|
||
h->esym.asym.sc = scText;
|
||
else if (strcmp (name, ".data") == 0)
|
||
h->esym.asym.sc = scData;
|
||
else if (strcmp (name, ".sdata") == 0)
|
||
h->esym.asym.sc = scSData;
|
||
else if (strcmp (name, ".rodata") == 0
|
||
|| strcmp (name, ".rdata") == 0)
|
||
h->esym.asym.sc = scRData;
|
||
else if (strcmp (name, ".bss") == 0)
|
||
h->esym.asym.sc = scBss;
|
||
else if (strcmp (name, ".sbss") == 0)
|
||
h->esym.asym.sc = scSBss;
|
||
else if (strcmp (name, ".init") == 0)
|
||
h->esym.asym.sc = scInit;
|
||
else if (strcmp (name, ".fini") == 0)
|
||
h->esym.asym.sc = scFini;
|
||
else
|
||
h->esym.asym.sc = scAbs;
|
||
}
|
||
}
|
||
|
||
h->esym.asym.reserved = 0;
|
||
h->esym.asym.index = indexNil;
|
||
}
|
||
|
||
if (h->root.root.type == bfd_link_hash_common)
|
||
h->esym.asym.value = h->root.root.u.c.size;
|
||
else if (h->root.root.type == bfd_link_hash_defined
|
||
|| h->root.root.type == bfd_link_hash_defweak)
|
||
{
|
||
if (h->esym.asym.sc == scCommon)
|
||
h->esym.asym.sc = scBss;
|
||
else if (h->esym.asym.sc == scSCommon)
|
||
h->esym.asym.sc = scSBss;
|
||
|
||
sec = h->root.root.u.def.section;
|
||
output_section = sec->output_section;
|
||
if (output_section != NULL)
|
||
h->esym.asym.value = (h->root.root.u.def.value
|
||
+ sec->output_offset
|
||
+ output_section->vma);
|
||
else
|
||
h->esym.asym.value = 0;
|
||
}
|
||
else if ((h->root.elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
|
||
{
|
||
/* Set type and value for a symbol with a function stub. */
|
||
h->esym.asym.st = stProc;
|
||
sec = h->root.root.u.def.section;
|
||
if (sec == NULL)
|
||
h->esym.asym.value = 0;
|
||
else
|
||
{
|
||
output_section = sec->output_section;
|
||
if (output_section != NULL)
|
||
h->esym.asym.value = (h->root.plt_offset
|
||
+ sec->output_offset
|
||
+ output_section->vma);
|
||
else
|
||
h->esym.asym.value = 0;
|
||
}
|
||
#if 0 /* FIXME? */
|
||
h->esym.ifd = 0;
|
||
#endif
|
||
}
|
||
|
||
if (! bfd_ecoff_debug_one_external (einfo->abfd, einfo->debug, einfo->swap,
|
||
h->root.root.root.string,
|
||
&h->esym))
|
||
{
|
||
einfo->failed = true;
|
||
return false;
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Create a runtime procedure table from the .mdebug section. */
|
||
|
||
static boolean
|
||
mips_elf_create_procedure_table (handle, abfd, info, s, debug)
|
||
PTR handle;
|
||
bfd *abfd;
|
||
struct bfd_link_info *info;
|
||
asection *s;
|
||
struct ecoff_debug_info *debug;
|
||
{
|
||
const struct ecoff_debug_swap *swap;
|
||
HDRR *hdr = &debug->symbolic_header;
|
||
RPDR *rpdr, *rp;
|
||
struct rpdr_ext *erp;
|
||
PTR rtproc;
|
||
struct pdr_ext *epdr;
|
||
struct sym_ext *esym;
|
||
char *ss, **sv;
|
||
char *str;
|
||
unsigned long size, count;
|
||
unsigned long sindex;
|
||
unsigned long i;
|
||
PDR pdr;
|
||
SYMR sym;
|
||
const char *no_name_func = "static procedure (no name)";
|
||
|
||
epdr = NULL;
|
||
rpdr = NULL;
|
||
esym = NULL;
|
||
ss = NULL;
|
||
sv = NULL;
|
||
|
||
swap = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap;
|
||
|
||
sindex = strlen (no_name_func) + 1;
|
||
count = hdr->ipdMax;
|
||
if (count > 0)
|
||
{
|
||
size = swap->external_pdr_size;
|
||
|
||
epdr = (struct pdr_ext *) bfd_malloc (size * count);
|
||
if (epdr == NULL)
|
||
goto error_return;
|
||
|
||
if (! _bfd_ecoff_get_accumulated_pdr (handle, (PTR) epdr))
|
||
goto error_return;
|
||
|
||
size = sizeof (RPDR);
|
||
rp = rpdr = (RPDR *) bfd_malloc (size * count);
|
||
if (rpdr == NULL)
|
||
goto error_return;
|
||
|
||
sv = (char **) bfd_malloc (sizeof (char *) * count);
|
||
if (sv == NULL)
|
||
goto error_return;
|
||
|
||
count = hdr->isymMax;
|
||
size = swap->external_sym_size;
|
||
esym = (struct sym_ext *) bfd_malloc (size * count);
|
||
if (esym == NULL)
|
||
goto error_return;
|
||
|
||
if (! _bfd_ecoff_get_accumulated_sym (handle, (PTR) esym))
|
||
goto error_return;
|
||
|
||
count = hdr->issMax;
|
||
ss = (char *) bfd_malloc (count);
|
||
if (ss == NULL)
|
||
goto error_return;
|
||
if (! _bfd_ecoff_get_accumulated_ss (handle, (PTR) ss))
|
||
goto error_return;
|
||
|
||
count = hdr->ipdMax;
|
||
for (i = 0; i < count; i++, rp++)
|
||
{
|
||
(*swap->swap_pdr_in) (abfd, (PTR) (epdr + i), &pdr);
|
||
(*swap->swap_sym_in) (abfd, (PTR) &esym[pdr.isym], &sym);
|
||
rp->adr = sym.value;
|
||
rp->regmask = pdr.regmask;
|
||
rp->regoffset = pdr.regoffset;
|
||
rp->fregmask = pdr.fregmask;
|
||
rp->fregoffset = pdr.fregoffset;
|
||
rp->frameoffset = pdr.frameoffset;
|
||
rp->framereg = pdr.framereg;
|
||
rp->pcreg = pdr.pcreg;
|
||
rp->irpss = sindex;
|
||
sv[i] = ss + sym.iss;
|
||
sindex += strlen (sv[i]) + 1;
|
||
}
|
||
}
|
||
|
||
size = sizeof (struct rpdr_ext) * (count + 2) + sindex;
|
||
size = BFD_ALIGN (size, 16);
|
||
rtproc = (PTR) bfd_alloc (abfd, size);
|
||
if (rtproc == NULL)
|
||
{
|
||
mips_elf_hash_table (info)->procedure_count = 0;
|
||
goto error_return;
|
||
}
|
||
|
||
mips_elf_hash_table (info)->procedure_count = count + 2;
|
||
|
||
erp = (struct rpdr_ext *) rtproc;
|
||
memset (erp, 0, sizeof (struct rpdr_ext));
|
||
erp++;
|
||
str = (char *) rtproc + sizeof (struct rpdr_ext) * (count + 2);
|
||
strcpy (str, no_name_func);
|
||
str += strlen (no_name_func) + 1;
|
||
for (i = 0; i < count; i++)
|
||
{
|
||
ecoff_swap_rpdr_out (abfd, rpdr + i, erp + i);
|
||
strcpy (str, sv[i]);
|
||
str += strlen (sv[i]) + 1;
|
||
}
|
||
ecoff_put_off (abfd, (bfd_vma) -1, (bfd_byte *) (erp + count)->p_adr);
|
||
|
||
/* Set the size and contents of .rtproc section. */
|
||
s->_raw_size = size;
|
||
s->contents = rtproc;
|
||
|
||
/* Skip this section later on (I don't think this currently
|
||
matters, but someday it might). */
|
||
s->link_order_head = (struct bfd_link_order *) NULL;
|
||
|
||
if (epdr != NULL)
|
||
free (epdr);
|
||
if (rpdr != NULL)
|
||
free (rpdr);
|
||
if (esym != NULL)
|
||
free (esym);
|
||
if (ss != NULL)
|
||
free (ss);
|
||
if (sv != NULL)
|
||
free (sv);
|
||
|
||
return true;
|
||
|
||
error_return:
|
||
if (epdr != NULL)
|
||
free (epdr);
|
||
if (rpdr != NULL)
|
||
free (rpdr);
|
||
if (esym != NULL)
|
||
free (esym);
|
||
if (ss != NULL)
|
||
free (ss);
|
||
if (sv != NULL)
|
||
free (sv);
|
||
return false;
|
||
}
|
||
|
||
/* A comparison routine used to sort .gptab entries. */
|
||
|
||
static int
|
||
gptab_compare (p1, p2)
|
||
const PTR p1;
|
||
const PTR p2;
|
||
{
|
||
const Elf32_gptab *a1 = (const Elf32_gptab *) p1;
|
||
const Elf32_gptab *a2 = (const Elf32_gptab *) p2;
|
||
|
||
return a1->gt_entry.gt_g_value - a2->gt_entry.gt_g_value;
|
||
}
|
||
|
||
/* We need to use a special link routine to handle the .reginfo and
|
||
the .mdebug sections. We need to merge all instances of these
|
||
sections together, not write them all out sequentially. */
|
||
|
||
static boolean
|
||
mips_elf_final_link (abfd, info)
|
||
bfd *abfd;
|
||
struct bfd_link_info *info;
|
||
{
|
||
asection **secpp;
|
||
asection *o;
|
||
struct bfd_link_order *p;
|
||
asection *reginfo_sec, *mdebug_sec, *gptab_data_sec, *gptab_bss_sec;
|
||
asection *rtproc_sec;
|
||
Elf32_RegInfo reginfo;
|
||
struct ecoff_debug_info debug;
|
||
const struct ecoff_debug_swap *swap
|
||
= get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap;
|
||
HDRR *symhdr = &debug.symbolic_header;
|
||
PTR mdebug_handle = NULL;
|
||
|
||
/* Drop the .options section, since it has special semantics which I
|
||
haven't bothered to figure out. */
|
||
for (secpp = &abfd->sections; *secpp != NULL; secpp = &(*secpp)->next)
|
||
{
|
||
if (strcmp ((*secpp)->name, ".options") == 0)
|
||
{
|
||
for (p = (*secpp)->link_order_head; p != NULL; p = p->next)
|
||
if (p->type == bfd_indirect_link_order)
|
||
p->u.indirect.section->flags &=~ SEC_HAS_CONTENTS;
|
||
(*secpp)->link_order_head = NULL;
|
||
*secpp = (*secpp)->next;
|
||
--abfd->section_count;
|
||
break;
|
||
}
|
||
}
|
||
|
||
/* Get a value for the GP register. */
|
||
if (elf_gp (abfd) == 0)
|
||
{
|
||
struct bfd_link_hash_entry *h;
|
||
|
||
h = bfd_link_hash_lookup (info->hash, "_gp", false, false, true);
|
||
if (h != (struct bfd_link_hash_entry *) NULL
|
||
&& h->type == bfd_link_hash_defined)
|
||
elf_gp (abfd) = (h->u.def.value
|
||
+ h->u.def.section->output_section->vma
|
||
+ h->u.def.section->output_offset);
|
||
else if (info->relocateable)
|
||
{
|
||
bfd_vma lo;
|
||
|
||
/* Make up a value. */
|
||
lo = (bfd_vma) -1;
|
||
for (o = abfd->sections; o != (asection *) NULL; o = o->next)
|
||
{
|
||
if (o->vma < lo
|
||
&& (strcmp (o->name, ".sbss") == 0
|
||
|| strcmp (o->name, ".sdata") == 0
|
||
|| strcmp (o->name, ".lit4") == 0
|
||
|| strcmp (o->name, ".lit8") == 0))
|
||
lo = o->vma;
|
||
}
|
||
elf_gp (abfd) = lo + ELF_MIPS_GP_OFFSET (abfd);
|
||
}
|
||
else
|
||
{
|
||
/* If the relocate_section function needs to do a reloc
|
||
involving the GP value, it should make a reloc_dangerous
|
||
callback to warn that GP is not defined. */
|
||
}
|
||
}
|
||
|
||
/* Go through the sections and collect the .reginfo and .mdebug
|
||
information. */
|
||
reginfo_sec = NULL;
|
||
mdebug_sec = NULL;
|
||
gptab_data_sec = NULL;
|
||
gptab_bss_sec = NULL;
|
||
for (o = abfd->sections; o != (asection *) NULL; o = o->next)
|
||
{
|
||
if (strcmp (o->name, ".reginfo") == 0)
|
||
{
|
||
memset (®info, 0, sizeof reginfo);
|
||
|
||
/* We have found the .reginfo section in the output file.
|
||
Look through all the link_orders comprising it and merge
|
||
the information together. */
|
||
for (p = o->link_order_head;
|
||
p != (struct bfd_link_order *) NULL;
|
||
p = p->next)
|
||
{
|
||
asection *input_section;
|
||
bfd *input_bfd;
|
||
Elf32_External_RegInfo ext;
|
||
Elf32_RegInfo sub;
|
||
|
||
if (p->type != bfd_indirect_link_order)
|
||
{
|
||
if (p->type == bfd_fill_link_order)
|
||
continue;
|
||
abort ();
|
||
}
|
||
|
||
input_section = p->u.indirect.section;
|
||
input_bfd = input_section->owner;
|
||
|
||
/* The linker emulation code has probably clobbered the
|
||
size to be zero bytes. */
|
||
if (input_section->_raw_size == 0)
|
||
input_section->_raw_size = sizeof (Elf32_External_RegInfo);
|
||
|
||
if (! bfd_get_section_contents (input_bfd, input_section,
|
||
(PTR) &ext,
|
||
(file_ptr) 0,
|
||
sizeof ext))
|
||
return false;
|
||
|
||
bfd_mips_elf32_swap_reginfo_in (input_bfd, &ext, &sub);
|
||
|
||
reginfo.ri_gprmask |= sub.ri_gprmask;
|
||
reginfo.ri_cprmask[0] |= sub.ri_cprmask[0];
|
||
reginfo.ri_cprmask[1] |= sub.ri_cprmask[1];
|
||
reginfo.ri_cprmask[2] |= sub.ri_cprmask[2];
|
||
reginfo.ri_cprmask[3] |= sub.ri_cprmask[3];
|
||
|
||
/* ri_gp_value is set by the function
|
||
mips_elf32_section_processing when the section is
|
||
finally written out. */
|
||
|
||
/* Hack: reset the SEC_HAS_CONTENTS flag so that
|
||
elf_link_input_bfd ignores this section. */
|
||
input_section->flags &=~ SEC_HAS_CONTENTS;
|
||
}
|
||
|
||
/* Force the section size to the value we want. */
|
||
o->_raw_size = sizeof (Elf32_External_RegInfo);
|
||
|
||
/* Skip this section later on (I don't think this currently
|
||
matters, but someday it might). */
|
||
o->link_order_head = (struct bfd_link_order *) NULL;
|
||
|
||
reginfo_sec = o;
|
||
}
|
||
|
||
if (strcmp (o->name, ".mdebug") == 0)
|
||
{
|
||
struct extsym_info einfo;
|
||
|
||
/* We have found the .mdebug section in the output file.
|
||
Look through all the link_orders comprising it and merge
|
||
the information together. */
|
||
symhdr->magic = swap->sym_magic;
|
||
/* FIXME: What should the version stamp be? */
|
||
symhdr->vstamp = 0;
|
||
symhdr->ilineMax = 0;
|
||
symhdr->cbLine = 0;
|
||
symhdr->idnMax = 0;
|
||
symhdr->ipdMax = 0;
|
||
symhdr->isymMax = 0;
|
||
symhdr->ioptMax = 0;
|
||
symhdr->iauxMax = 0;
|
||
symhdr->issMax = 0;
|
||
symhdr->issExtMax = 0;
|
||
symhdr->ifdMax = 0;
|
||
symhdr->crfd = 0;
|
||
symhdr->iextMax = 0;
|
||
|
||
/* We accumulate the debugging information itself in the
|
||
debug_info structure. */
|
||
debug.line = NULL;
|
||
debug.external_dnr = NULL;
|
||
debug.external_pdr = NULL;
|
||
debug.external_sym = NULL;
|
||
debug.external_opt = NULL;
|
||
debug.external_aux = NULL;
|
||
debug.ss = NULL;
|
||
debug.ssext = debug.ssext_end = NULL;
|
||
debug.external_fdr = NULL;
|
||
debug.external_rfd = NULL;
|
||
debug.external_ext = debug.external_ext_end = NULL;
|
||
|
||
mdebug_handle = bfd_ecoff_debug_init (abfd, &debug, swap, info);
|
||
if (mdebug_handle == (PTR) NULL)
|
||
return false;
|
||
|
||
if (SGI_COMPAT (abfd))
|
||
{
|
||
asection *s;
|
||
EXTR esym;
|
||
bfd_vma last;
|
||
unsigned int i;
|
||
static const char * const name[] =
|
||
{ ".text", ".init", ".fini", ".data",
|
||
".rodata", ".sdata", ".sbss", ".bss" };
|
||
static const int sc[] = { scText, scInit, scFini, scData,
|
||
scRData, scSData, scSBss, scBss };
|
||
|
||
esym.jmptbl = 0;
|
||
esym.cobol_main = 0;
|
||
esym.weakext = 0;
|
||
esym.reserved = 0;
|
||
esym.ifd = ifdNil;
|
||
esym.asym.iss = issNil;
|
||
esym.asym.st = stLocal;
|
||
esym.asym.reserved = 0;
|
||
esym.asym.index = indexNil;
|
||
for (i = 0; i < 8; i++)
|
||
{
|
||
esym.asym.sc = sc[i];
|
||
s = bfd_get_section_by_name (abfd, name[i]);
|
||
if (s != NULL)
|
||
{
|
||
esym.asym.value = s->vma;
|
||
last = s->vma + s->_raw_size;
|
||
}
|
||
else
|
||
esym.asym.value = last;
|
||
|
||
if (! bfd_ecoff_debug_one_external (abfd, &debug, swap,
|
||
name[i], &esym))
|
||
return false;
|
||
}
|
||
}
|
||
|
||
for (p = o->link_order_head;
|
||
p != (struct bfd_link_order *) NULL;
|
||
p = p->next)
|
||
{
|
||
asection *input_section;
|
||
bfd *input_bfd;
|
||
const struct ecoff_debug_swap *input_swap;
|
||
struct ecoff_debug_info input_debug;
|
||
char *eraw_src;
|
||
char *eraw_end;
|
||
|
||
if (p->type != bfd_indirect_link_order)
|
||
{
|
||
if (p->type == bfd_fill_link_order)
|
||
continue;
|
||
abort ();
|
||
}
|
||
|
||
input_section = p->u.indirect.section;
|
||
input_bfd = input_section->owner;
|
||
|
||
if (bfd_get_flavour (input_bfd) != bfd_target_elf_flavour
|
||
|| (get_elf_backend_data (input_bfd)
|
||
->elf_backend_ecoff_debug_swap) == NULL)
|
||
{
|
||
/* I don't know what a non MIPS ELF bfd would be
|
||
doing with a .mdebug section, but I don't really
|
||
want to deal with it. */
|
||
continue;
|
||
}
|
||
|
||
input_swap = (get_elf_backend_data (input_bfd)
|
||
->elf_backend_ecoff_debug_swap);
|
||
|
||
BFD_ASSERT (p->size == input_section->_raw_size);
|
||
|
||
/* The ECOFF linking code expects that we have already
|
||
read in the debugging information and set up an
|
||
ecoff_debug_info structure, so we do that now. */
|
||
if (! _bfd_mips_elf_read_ecoff_info (input_bfd, input_section,
|
||
&input_debug))
|
||
return false;
|
||
|
||
if (! (bfd_ecoff_debug_accumulate
|
||
(mdebug_handle, abfd, &debug, swap, input_bfd,
|
||
&input_debug, input_swap, info)))
|
||
return false;
|
||
|
||
/* Loop through the external symbols. For each one with
|
||
interesting information, try to find the symbol in
|
||
the linker global hash table and save the information
|
||
for the output external symbols. */
|
||
eraw_src = input_debug.external_ext;
|
||
eraw_end = (eraw_src
|
||
+ (input_debug.symbolic_header.iextMax
|
||
* input_swap->external_ext_size));
|
||
for (;
|
||
eraw_src < eraw_end;
|
||
eraw_src += input_swap->external_ext_size)
|
||
{
|
||
EXTR ext;
|
||
const char *name;
|
||
struct mips_elf_link_hash_entry *h;
|
||
|
||
(*input_swap->swap_ext_in) (input_bfd, (PTR) eraw_src, &ext);
|
||
if (ext.asym.sc == scNil
|
||
|| ext.asym.sc == scUndefined
|
||
|| ext.asym.sc == scSUndefined)
|
||
continue;
|
||
|
||
name = input_debug.ssext + ext.asym.iss;
|
||
h = mips_elf_link_hash_lookup (mips_elf_hash_table (info),
|
||
name, false, false, true);
|
||
if (h == NULL || h->esym.ifd != -2)
|
||
continue;
|
||
|
||
if (ext.ifd != -1)
|
||
{
|
||
BFD_ASSERT (ext.ifd
|
||
< input_debug.symbolic_header.ifdMax);
|
||
ext.ifd = input_debug.ifdmap[ext.ifd];
|
||
}
|
||
|
||
h->esym = ext;
|
||
}
|
||
|
||
/* Free up the information we just read. */
|
||
free (input_debug.line);
|
||
free (input_debug.external_dnr);
|
||
free (input_debug.external_pdr);
|
||
free (input_debug.external_sym);
|
||
free (input_debug.external_opt);
|
||
free (input_debug.external_aux);
|
||
free (input_debug.ss);
|
||
free (input_debug.ssext);
|
||
free (input_debug.external_fdr);
|
||
free (input_debug.external_rfd);
|
||
free (input_debug.external_ext);
|
||
|
||
/* Hack: reset the SEC_HAS_CONTENTS flag so that
|
||
elf_link_input_bfd ignores this section. */
|
||
input_section->flags &=~ SEC_HAS_CONTENTS;
|
||
}
|
||
|
||
if (SGI_COMPAT (abfd) && info->shared)
|
||
{
|
||
/* Create .rtproc section. */
|
||
rtproc_sec = bfd_get_section_by_name (abfd, ".rtproc");
|
||
if (rtproc_sec == NULL)
|
||
{
|
||
flagword flags = (SEC_HAS_CONTENTS | SEC_IN_MEMORY
|
||
| SEC_READONLY);
|
||
|
||
rtproc_sec = bfd_make_section (abfd, ".rtproc");
|
||
if (rtproc_sec == NULL
|
||
|| ! bfd_set_section_flags (abfd, rtproc_sec, flags)
|
||
|| ! bfd_set_section_alignment (abfd, rtproc_sec, 12))
|
||
return false;
|
||
}
|
||
|
||
if (! mips_elf_create_procedure_table (mdebug_handle, abfd,
|
||
info, rtproc_sec, &debug))
|
||
return false;
|
||
}
|
||
|
||
/* Build the external symbol information. */
|
||
einfo.abfd = abfd;
|
||
einfo.info = info;
|
||
einfo.debug = &debug;
|
||
einfo.swap = swap;
|
||
einfo.failed = false;
|
||
mips_elf_link_hash_traverse (mips_elf_hash_table (info),
|
||
mips_elf_output_extsym,
|
||
(PTR) &einfo);
|
||
if (einfo.failed)
|
||
return false;
|
||
|
||
/* Set the size of the .mdebug section. */
|
||
o->_raw_size = bfd_ecoff_debug_size (abfd, &debug, swap);
|
||
|
||
/* Skip this section later on (I don't think this currently
|
||
matters, but someday it might). */
|
||
o->link_order_head = (struct bfd_link_order *) NULL;
|
||
|
||
mdebug_sec = o;
|
||
}
|
||
|
||
if (strncmp (o->name, ".gptab.", sizeof ".gptab." - 1) == 0)
|
||
{
|
||
const char *subname;
|
||
unsigned int c;
|
||
Elf32_gptab *tab;
|
||
Elf32_External_gptab *ext_tab;
|
||
unsigned int i;
|
||
|
||
/* The .gptab.sdata and .gptab.sbss sections hold
|
||
information describing how the small data area would
|
||
change depending upon the -G switch. These sections
|
||
not used in executables files. */
|
||
if (! info->relocateable)
|
||
{
|
||
asection **secpp;
|
||
|
||
for (p = o->link_order_head;
|
||
p != (struct bfd_link_order *) NULL;
|
||
p = p->next)
|
||
{
|
||
asection *input_section;
|
||
|
||
if (p->type != bfd_indirect_link_order)
|
||
{
|
||
if (p->type == bfd_fill_link_order)
|
||
continue;
|
||
abort ();
|
||
}
|
||
|
||
input_section = p->u.indirect.section;
|
||
|
||
/* Hack: reset the SEC_HAS_CONTENTS flag so that
|
||
elf_link_input_bfd ignores this section. */
|
||
input_section->flags &=~ SEC_HAS_CONTENTS;
|
||
}
|
||
|
||
/* Skip this section later on (I don't think this
|
||
currently matters, but someday it might). */
|
||
o->link_order_head = (struct bfd_link_order *) NULL;
|
||
|
||
/* Really remove the section. */
|
||
for (secpp = &abfd->sections;
|
||
*secpp != o;
|
||
secpp = &(*secpp)->next)
|
||
;
|
||
*secpp = (*secpp)->next;
|
||
--abfd->section_count;
|
||
|
||
continue;
|
||
}
|
||
|
||
/* There is one gptab for initialized data, and one for
|
||
uninitialized data. */
|
||
if (strcmp (o->name, ".gptab.sdata") == 0)
|
||
gptab_data_sec = o;
|
||
else if (strcmp (o->name, ".gptab.sbss") == 0)
|
||
gptab_bss_sec = o;
|
||
else
|
||
{
|
||
(*_bfd_error_handler)
|
||
("%s: illegal section name `%s'",
|
||
bfd_get_filename (abfd), o->name);
|
||
bfd_set_error (bfd_error_nonrepresentable_section);
|
||
return false;
|
||
}
|
||
|
||
/* The linker script always combines .gptab.data and
|
||
.gptab.sdata into .gptab.sdata, and likewise for
|
||
.gptab.bss and .gptab.sbss. It is possible that there is
|
||
no .sdata or .sbss section in the output file, in which
|
||
case we must change the name of the output section. */
|
||
subname = o->name + sizeof ".gptab" - 1;
|
||
if (bfd_get_section_by_name (abfd, subname) == NULL)
|
||
{
|
||
if (o == gptab_data_sec)
|
||
o->name = ".gptab.data";
|
||
else
|
||
o->name = ".gptab.bss";
|
||
subname = o->name + sizeof ".gptab" - 1;
|
||
BFD_ASSERT (bfd_get_section_by_name (abfd, subname) != NULL);
|
||
}
|
||
|
||
/* Set up the first entry. */
|
||
c = 1;
|
||
tab = (Elf32_gptab *) bfd_malloc (c * sizeof (Elf32_gptab));
|
||
if (tab == NULL)
|
||
return false;
|
||
tab[0].gt_header.gt_current_g_value = elf_gp_size (abfd);
|
||
tab[0].gt_header.gt_unused = 0;
|
||
|
||
/* Combine the input sections. */
|
||
for (p = o->link_order_head;
|
||
p != (struct bfd_link_order *) NULL;
|
||
p = p->next)
|
||
{
|
||
asection *input_section;
|
||
bfd *input_bfd;
|
||
bfd_size_type size;
|
||
unsigned long last;
|
||
bfd_size_type gpentry;
|
||
|
||
if (p->type != bfd_indirect_link_order)
|
||
{
|
||
if (p->type == bfd_fill_link_order)
|
||
continue;
|
||
abort ();
|
||
}
|
||
|
||
input_section = p->u.indirect.section;
|
||
input_bfd = input_section->owner;
|
||
|
||
/* Combine the gptab entries for this input section one
|
||
by one. We know that the input gptab entries are
|
||
sorted by ascending -G value. */
|
||
size = bfd_section_size (input_bfd, input_section);
|
||
last = 0;
|
||
for (gpentry = sizeof (Elf32_External_gptab);
|
||
gpentry < size;
|
||
gpentry += sizeof (Elf32_External_gptab))
|
||
{
|
||
Elf32_External_gptab ext_gptab;
|
||
Elf32_gptab int_gptab;
|
||
unsigned long val;
|
||
unsigned long add;
|
||
boolean exact;
|
||
unsigned int look;
|
||
|
||
if (! (bfd_get_section_contents
|
||
(input_bfd, input_section, (PTR) &ext_gptab,
|
||
gpentry, sizeof (Elf32_External_gptab))))
|
||
{
|
||
free (tab);
|
||
return false;
|
||
}
|
||
|
||
bfd_mips_elf32_swap_gptab_in (input_bfd, &ext_gptab,
|
||
&int_gptab);
|
||
val = int_gptab.gt_entry.gt_g_value;
|
||
add = int_gptab.gt_entry.gt_bytes - last;
|
||
|
||
exact = false;
|
||
for (look = 1; look < c; look++)
|
||
{
|
||
if (tab[look].gt_entry.gt_g_value >= val)
|
||
tab[look].gt_entry.gt_bytes += add;
|
||
|
||
if (tab[look].gt_entry.gt_g_value == val)
|
||
exact = true;
|
||
}
|
||
|
||
if (! exact)
|
||
{
|
||
Elf32_gptab *new_tab;
|
||
unsigned int max;
|
||
|
||
/* We need a new table entry. */
|
||
new_tab = ((Elf32_gptab *)
|
||
bfd_realloc ((PTR) tab,
|
||
(c + 1) * sizeof (Elf32_gptab)));
|
||
if (new_tab == NULL)
|
||
{
|
||
free (tab);
|
||
return false;
|
||
}
|
||
tab = new_tab;
|
||
tab[c].gt_entry.gt_g_value = val;
|
||
tab[c].gt_entry.gt_bytes = add;
|
||
|
||
/* Merge in the size for the next smallest -G
|
||
value, since that will be implied by this new
|
||
value. */
|
||
max = 0;
|
||
for (look = 1; look < c; look++)
|
||
{
|
||
if (tab[look].gt_entry.gt_g_value < val
|
||
&& (max == 0
|
||
|| (tab[look].gt_entry.gt_g_value
|
||
> tab[max].gt_entry.gt_g_value)))
|
||
max = look;
|
||
}
|
||
if (max != 0)
|
||
tab[c].gt_entry.gt_bytes +=
|
||
tab[max].gt_entry.gt_bytes;
|
||
|
||
++c;
|
||
}
|
||
|
||
last = int_gptab.gt_entry.gt_bytes;
|
||
}
|
||
|
||
/* Hack: reset the SEC_HAS_CONTENTS flag so that
|
||
elf_link_input_bfd ignores this section. */
|
||
input_section->flags &=~ SEC_HAS_CONTENTS;
|
||
}
|
||
|
||
/* The table must be sorted by -G value. */
|
||
if (c > 2)
|
||
qsort (tab + 1, c - 1, sizeof (tab[0]), gptab_compare);
|
||
|
||
/* Swap out the table. */
|
||
ext_tab = ((Elf32_External_gptab *)
|
||
bfd_alloc (abfd, c * sizeof (Elf32_External_gptab)));
|
||
if (ext_tab == NULL)
|
||
{
|
||
free (tab);
|
||
return false;
|
||
}
|
||
|
||
for (i = 0; i < c; i++)
|
||
bfd_mips_elf32_swap_gptab_out (abfd, tab + i, ext_tab + i);
|
||
free (tab);
|
||
|
||
o->_raw_size = c * sizeof (Elf32_External_gptab);
|
||
o->contents = (bfd_byte *) ext_tab;
|
||
|
||
/* Skip this section later on (I don't think this currently
|
||
matters, but someday it might). */
|
||
o->link_order_head = (struct bfd_link_order *) NULL;
|
||
}
|
||
}
|
||
|
||
/* Invoke the regular ELF backend linker to do all the work. */
|
||
if (! bfd_elf32_bfd_final_link (abfd, info))
|
||
return false;
|
||
|
||
/* Now write out the computed sections. */
|
||
|
||
if (reginfo_sec != (asection *) NULL)
|
||
{
|
||
Elf32_External_RegInfo ext;
|
||
|
||
bfd_mips_elf32_swap_reginfo_out (abfd, ®info, &ext);
|
||
if (! bfd_set_section_contents (abfd, reginfo_sec, (PTR) &ext,
|
||
(file_ptr) 0, sizeof ext))
|
||
return false;
|
||
}
|
||
|
||
if (mdebug_sec != (asection *) NULL)
|
||
{
|
||
BFD_ASSERT (abfd->output_has_begun);
|
||
if (! bfd_ecoff_write_accumulated_debug (mdebug_handle, abfd, &debug,
|
||
swap, info,
|
||
mdebug_sec->filepos))
|
||
return false;
|
||
|
||
bfd_ecoff_debug_free (mdebug_handle, abfd, &debug, swap, info);
|
||
}
|
||
|
||
if (gptab_data_sec != (asection *) NULL)
|
||
{
|
||
if (! bfd_set_section_contents (abfd, gptab_data_sec,
|
||
gptab_data_sec->contents,
|
||
(file_ptr) 0,
|
||
gptab_data_sec->_raw_size))
|
||
return false;
|
||
}
|
||
|
||
if (gptab_bss_sec != (asection *) NULL)
|
||
{
|
||
if (! bfd_set_section_contents (abfd, gptab_bss_sec,
|
||
gptab_bss_sec->contents,
|
||
(file_ptr) 0,
|
||
gptab_bss_sec->_raw_size))
|
||
return false;
|
||
}
|
||
|
||
if (SGI_COMPAT (abfd))
|
||
{
|
||
rtproc_sec = bfd_get_section_by_name (abfd, ".rtproc");
|
||
if (rtproc_sec != NULL)
|
||
{
|
||
if (! bfd_set_section_contents (abfd, rtproc_sec,
|
||
rtproc_sec->contents,
|
||
(file_ptr) 0,
|
||
rtproc_sec->_raw_size))
|
||
return false;
|
||
}
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Handle a MIPS ELF HI16 reloc. */
|
||
|
||
static void
|
||
mips_elf_relocate_hi16 (input_bfd, relhi, rello, contents, addend)
|
||
bfd *input_bfd;
|
||
Elf_Internal_Rela *relhi;
|
||
Elf_Internal_Rela *rello;
|
||
bfd_byte *contents;
|
||
bfd_vma addend;
|
||
{
|
||
bfd_vma insn;
|
||
bfd_vma addlo;
|
||
|
||
insn = bfd_get_32 (input_bfd, contents + relhi->r_offset);
|
||
|
||
addlo = bfd_get_32 (input_bfd, contents + rello->r_offset);
|
||
addlo &= 0xffff;
|
||
|
||
addend += ((insn & 0xffff) << 16) + addlo;
|
||
|
||
if ((addlo & 0x8000) != 0)
|
||
addend -= 0x10000;
|
||
if ((addend & 0x8000) != 0)
|
||
addend += 0x10000;
|
||
|
||
bfd_put_32 (input_bfd,
|
||
(insn & 0xffff0000) | ((addend >> 16) & 0xffff),
|
||
contents + relhi->r_offset);
|
||
}
|
||
|
||
/* Handle a MIPS ELF local GOT16 reloc. */
|
||
|
||
static void
|
||
mips_elf_relocate_got_local (output_bfd, input_bfd, sgot, relhi, rello,
|
||
contents, addend)
|
||
bfd *output_bfd;
|
||
bfd *input_bfd;
|
||
asection *sgot;
|
||
Elf_Internal_Rela *relhi;
|
||
Elf_Internal_Rela *rello;
|
||
bfd_byte *contents;
|
||
bfd_vma addend;
|
||
{
|
||
int local_gotno;
|
||
int i;
|
||
bfd_vma insn;
|
||
bfd_vma addlo;
|
||
bfd_vma address;
|
||
bfd_vma hipage;
|
||
bfd_byte *got_contents;
|
||
struct mips_got_info *g;
|
||
|
||
insn = bfd_get_32 (input_bfd, contents + relhi->r_offset);
|
||
|
||
addlo = bfd_get_32 (input_bfd, contents + rello->r_offset);
|
||
addlo &= 0xffff;
|
||
|
||
addend += ((insn & 0xffff) << 16) + addlo;
|
||
|
||
if ((addlo & 0x8000) != 0)
|
||
addend -= 0x10000;
|
||
if ((addend & 0x8000) != 0)
|
||
addend += 0x10000;
|
||
|
||
/* Get a got entry representing requested hipage. */
|
||
BFD_ASSERT (elf_section_data (sgot) != NULL);
|
||
g = (struct mips_got_info *) elf_section_data (sgot)->tdata;
|
||
BFD_ASSERT (g != NULL);
|
||
|
||
local_gotno = g->local_gotno;
|
||
got_contents = sgot->contents;
|
||
hipage = addend & 0xffff0000;
|
||
|
||
for (i = MIPS_RESERVED_GOTNO; i < local_gotno; i++)
|
||
{
|
||
address = bfd_get_32 (input_bfd, got_contents + i * 4);
|
||
if (hipage == (address & 0xffff0000))
|
||
break;
|
||
if (address == (bfd_vma) 0)
|
||
{
|
||
bfd_put_32 (input_bfd, hipage, got_contents + i * 4);
|
||
break;
|
||
}
|
||
}
|
||
|
||
BFD_ASSERT (i < local_gotno);
|
||
#if 1
|
||
if (i == local_gotno)
|
||
(*_bfd_error_handler)
|
||
("ELF MIPS linker: more got entries are needed for hipage: %x",
|
||
hipage);
|
||
#endif
|
||
|
||
i = - ELF_MIPS_GP_OFFSET (output_bfd) + i * 4;
|
||
bfd_put_32 (input_bfd, (insn & 0xffff0000) | (i & 0xffff),
|
||
contents + relhi->r_offset);
|
||
}
|
||
|
||
/* Handle MIPS ELF CALL16 reloc and global GOT16 reloc. */
|
||
|
||
static void
|
||
mips_elf_relocate_global_got (input_bfd, rel, contents, offset)
|
||
bfd *input_bfd;
|
||
Elf_Internal_Rela *rel;
|
||
bfd_byte *contents;
|
||
bfd_vma offset;
|
||
{
|
||
bfd_vma insn;
|
||
|
||
insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
|
||
bfd_put_32 (input_bfd,
|
||
(insn & 0xffff0000) | (offset & 0xffff),
|
||
contents + rel->r_offset);
|
||
}
|
||
|
||
/* Relocate a MIPS ELF section. */
|
||
|
||
static boolean
|
||
mips_elf_relocate_section (output_bfd, info, input_bfd, input_section,
|
||
contents, relocs, local_syms, local_sections)
|
||
bfd *output_bfd;
|
||
struct bfd_link_info *info;
|
||
bfd *input_bfd;
|
||
asection *input_section;
|
||
bfd_byte *contents;
|
||
Elf_Internal_Rela *relocs;
|
||
Elf_Internal_Sym *local_syms;
|
||
asection **local_sections;
|
||
{
|
||
Elf_Internal_Shdr *symtab_hdr;
|
||
size_t locsymcount;
|
||
size_t extsymoff;
|
||
asection *sgot, *sreloc, *scpt;
|
||
bfd *dynobj;
|
||
bfd_vma gp;
|
||
Elf_Internal_Rela *rel;
|
||
Elf_Internal_Rela *relend;
|
||
struct mips_got_info *g;
|
||
|
||
dynobj = elf_hash_table (info)->dynobj;
|
||
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
|
||
|
||
sgot = NULL;
|
||
sreloc = NULL;
|
||
if (dynobj == NULL || ! SGI_COMPAT (output_bfd))
|
||
scpt = NULL;
|
||
else
|
||
scpt = bfd_get_section_by_name (dynobj, ".compact_rel");
|
||
g = NULL;
|
||
|
||
if (elf_bad_symtab (input_bfd))
|
||
{
|
||
locsymcount = symtab_hdr->sh_size / sizeof (Elf32_External_Sym);
|
||
extsymoff = 0;
|
||
}
|
||
else
|
||
{
|
||
locsymcount = symtab_hdr->sh_info;
|
||
extsymoff = symtab_hdr->sh_info;
|
||
}
|
||
|
||
gp = _bfd_get_gp_value (output_bfd);
|
||
|
||
rel = relocs;
|
||
relend = relocs + input_section->reloc_count;
|
||
for (; rel < relend; rel++)
|
||
{
|
||
int r_type;
|
||
reloc_howto_type *howto;
|
||
unsigned long r_symndx;
|
||
bfd_vma addend;
|
||
struct elf_link_hash_entry *h;
|
||
asection *sec;
|
||
Elf_Internal_Sym *sym;
|
||
bfd_reloc_status_type r;
|
||
|
||
r_type = ELF32_R_TYPE (rel->r_info);
|
||
if (r_type < 0 || r_type >= (int) R_MIPS_max)
|
||
{
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return false;
|
||
}
|
||
howto = elf_mips_howto_table + r_type;
|
||
|
||
if (dynobj != NULL
|
||
&& (r_type == R_MIPS_CALL16
|
||
|| r_type == R_MIPS_GOT16
|
||
|| r_type == R_MIPS_CALL_HI16
|
||
|| r_type == R_MIPS_CALL_LO16
|
||
|| r_type == R_MIPS_GOT_HI16
|
||
|| r_type == R_MIPS_GOT_LO16))
|
||
{
|
||
/* We need the .got section. */
|
||
if (sgot == NULL)
|
||
{
|
||
sgot = bfd_get_section_by_name (dynobj, ".got");
|
||
BFD_ASSERT (sgot != NULL);
|
||
BFD_ASSERT (elf_section_data (sgot) != NULL);
|
||
g = (struct mips_got_info *) elf_section_data (sgot)->tdata;
|
||
BFD_ASSERT (g != NULL);
|
||
}
|
||
}
|
||
|
||
r_symndx = ELF32_R_SYM (rel->r_info);
|
||
|
||
/* Mix in the change in GP address for a GP relative reloc. */
|
||
if (r_type != R_MIPS_GPREL16
|
||
&& r_type != R_MIPS_LITERAL
|
||
&& r_type != R_MIPS_GPREL32)
|
||
addend = 0;
|
||
else
|
||
{
|
||
if (gp == 0)
|
||
{
|
||
if (! ((*info->callbacks->reloc_dangerous)
|
||
(info,
|
||
"GP relative relocation when GP not defined",
|
||
input_bfd, input_section,
|
||
rel->r_offset)))
|
||
return false;
|
||
/* Only give the error once per link. */
|
||
gp = 4;
|
||
_bfd_set_gp_value (output_bfd, gp);
|
||
}
|
||
|
||
if (r_symndx < extsymoff
|
||
|| (elf_bad_symtab (input_bfd)
|
||
&& local_sections[r_symndx] != NULL))
|
||
{
|
||
/* This is a relocation against a section. The current
|
||
addend in the instruction is the difference between
|
||
INPUT_SECTION->vma and the GP value of INPUT_BFD. We
|
||
must change this to be the difference between the
|
||
final definition (which will end up in RELOCATION)
|
||
and the GP value of OUTPUT_BFD (which is in GP). */
|
||
addend = elf_gp (input_bfd) - gp;
|
||
}
|
||
else if (! info->relocateable)
|
||
{
|
||
/* We are doing a final link. The current addend in the
|
||
instruction is simply the desired offset into the
|
||
symbol (normally zero). We want the instruction to
|
||
hold the difference between the final definition of
|
||
the symbol (which will end up in RELOCATION) and the
|
||
GP value of OUTPUT_BFD (which is in GP). */
|
||
addend = - gp;
|
||
}
|
||
else
|
||
{
|
||
/* We are generating relocateable output, and we aren't
|
||
going to define this symbol, so we just leave the
|
||
instruction alone. */
|
||
addend = 0;
|
||
}
|
||
}
|
||
|
||
h = NULL;
|
||
sym = NULL;
|
||
sec = NULL;
|
||
if (info->relocateable)
|
||
{
|
||
/* This is a relocateable link. We don't have to change
|
||
anything, unless the reloc is against a section symbol,
|
||
in which case we have to adjust according to where the
|
||
section symbol winds up in the output section. */
|
||
if (r_symndx >= locsymcount
|
||
|| (elf_bad_symtab (input_bfd)
|
||
&& local_sections[r_symndx] == NULL))
|
||
r = bfd_reloc_ok;
|
||
else
|
||
{
|
||
sym = local_syms + r_symndx;
|
||
if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
|
||
r = bfd_reloc_ok;
|
||
else
|
||
{
|
||
sec = local_sections[r_symndx];
|
||
|
||
/* It would be logical to add sym->st_value here,
|
||
but Irix 5 sometimes generates a garbage symbol
|
||
value. */
|
||
addend += sec->output_offset;
|
||
|
||
/* If this is HI16 or GOT16 with an associated LO16,
|
||
adjust the addend accordingly. Otherwise, just
|
||
relocate. */
|
||
if (r_type != R_MIPS_HI16 && r_type != R_MIPS_GOT16)
|
||
r = _bfd_relocate_contents (howto, input_bfd,
|
||
addend,
|
||
contents + rel->r_offset);
|
||
else
|
||
{
|
||
Elf_Internal_Rela *lorel;
|
||
|
||
/* As a GNU extension, permit an arbitrary
|
||
number of R_MIPS_HI16 relocs before the
|
||
R_MIPS_LO16 reloc. This permits gcc to emit
|
||
the HI and LO relocs itself. */
|
||
if (r_type == R_MIPS_GOT16)
|
||
lorel = rel + 1;
|
||
else
|
||
{
|
||
for (lorel = rel + 1;
|
||
(lorel < relend
|
||
&& (ELF32_R_TYPE (lorel->r_info)
|
||
== R_MIPS_HI16));
|
||
lorel++)
|
||
;
|
||
}
|
||
if (lorel < relend
|
||
&& ELF32_R_TYPE (lorel->r_info) == R_MIPS_LO16)
|
||
{
|
||
mips_elf_relocate_hi16 (input_bfd, rel, lorel,
|
||
contents, addend);
|
||
r = bfd_reloc_ok;
|
||
}
|
||
else
|
||
r = _bfd_relocate_contents (howto, input_bfd,
|
||
addend,
|
||
contents + rel->r_offset);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
else
|
||
{
|
||
bfd_vma relocation;
|
||
boolean local;
|
||
|
||
/* This is a final link. */
|
||
sym = NULL;
|
||
if (r_symndx < extsymoff
|
||
|| (elf_bad_symtab (input_bfd)
|
||
&& local_sections[r_symndx] != NULL))
|
||
{
|
||
local = true;
|
||
sym = local_syms + r_symndx;
|
||
sec = local_sections[r_symndx];
|
||
relocation = (sec->output_section->vma
|
||
+ sec->output_offset);
|
||
|
||
/* It would be logical to always add sym->st_value here,
|
||
but Irix 5 sometimes generates a garbage symbol
|
||
value. */
|
||
if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
|
||
relocation += sym->st_value;
|
||
}
|
||
else
|
||
{
|
||
long indx;
|
||
|
||
local = false;
|
||
indx = r_symndx - extsymoff;
|
||
h = elf_sym_hashes (input_bfd)[indx];
|
||
while (h->root.type == bfd_link_hash_indirect
|
||
|| h->root.type == bfd_link_hash_warning)
|
||
h = (struct elf_link_hash_entry *) h->root.u.i.link;
|
||
if (strcmp (h->root.root.string, "_gp_disp") == 0)
|
||
{
|
||
if (gp == 0)
|
||
{
|
||
if (! ((*info->callbacks->reloc_dangerous)
|
||
(info,
|
||
"_gp_disp used when GP not defined",
|
||
input_bfd, input_section,
|
||
rel->r_offset)))
|
||
return false;
|
||
/* Only give the error once per link. */
|
||
gp = 4;
|
||
_bfd_set_gp_value (output_bfd, gp);
|
||
relocation = 0;
|
||
}
|
||
else
|
||
{
|
||
sec = input_section;
|
||
if (sec->output_section != NULL)
|
||
relocation = (gp
|
||
- (rel->r_offset
|
||
+ sec->output_section->vma
|
||
+ sec->output_offset));
|
||
else
|
||
relocation = gp - rel->r_offset;
|
||
if (r_type == R_MIPS_LO16)
|
||
relocation += 4;
|
||
}
|
||
}
|
||
else if (h->root.type == bfd_link_hash_defined
|
||
|| h->root.type == bfd_link_hash_defweak)
|
||
{
|
||
sec = h->root.u.def.section;
|
||
if (sec->output_section == NULL)
|
||
relocation = 0;
|
||
else
|
||
relocation = (h->root.u.def.value
|
||
+ sec->output_section->vma
|
||
+ sec->output_offset);
|
||
}
|
||
else if (h->root.type == bfd_link_hash_undefweak)
|
||
relocation = 0;
|
||
else if (info->shared && ! info->symbolic)
|
||
relocation = 0;
|
||
else if (strcmp (h->root.root.string, "_DYNAMIC_LINK") == 0)
|
||
{
|
||
/* If this is a dynamic link, we should have created
|
||
a _DYNAMIC_LINK symbol in
|
||
mips_elf_create_dynamic_sections. Otherwise, we
|
||
should define the symbol with a value of 0.
|
||
FIXME: It should probably get into the symbol
|
||
table somehow as well. */
|
||
BFD_ASSERT (! info->shared);
|
||
BFD_ASSERT (bfd_get_section_by_name (output_bfd,
|
||
".dynamic") == NULL);
|
||
relocation = 0;
|
||
}
|
||
else
|
||
{
|
||
if (! ((*info->callbacks->undefined_symbol)
|
||
(info, h->root.root.string, input_bfd,
|
||
input_section, rel->r_offset)))
|
||
return false;
|
||
relocation = 0;
|
||
}
|
||
}
|
||
|
||
if (r_type == R_MIPS_HI16)
|
||
{
|
||
Elf_Internal_Rela *lorel;
|
||
|
||
/* As a GNU extension, permit an arbitrary number of
|
||
R_MIPS_HI16 relocs before the R_MIPS_LO16 reloc.
|
||
This permits gcc to emit the HI and LO relocs itself. */
|
||
for (lorel = rel + 1;
|
||
(lorel < relend
|
||
&& ELF32_R_TYPE (lorel->r_info) == R_MIPS_HI16);
|
||
lorel++)
|
||
;
|
||
if (lorel < relend
|
||
&& ELF32_R_TYPE (lorel->r_info) == R_MIPS_LO16)
|
||
{
|
||
mips_elf_relocate_hi16 (input_bfd, rel, lorel,
|
||
contents, relocation + addend);
|
||
r = bfd_reloc_ok;
|
||
}
|
||
else
|
||
r = _bfd_final_link_relocate (howto, input_bfd, input_section,
|
||
contents, rel->r_offset,
|
||
relocation, addend);
|
||
}
|
||
else if (r_type == R_MIPS_GOT16 && local)
|
||
{
|
||
/* GOT16 must also have an associated LO16 in the local
|
||
case. In this case, the addend is extracted and the
|
||
section in which the referenced object is determined.
|
||
Then the final address of the object is computed and
|
||
the GOT entry for the hipage (an aligned 64kb chunk)
|
||
is added to .got section if needed. The offset field
|
||
of the GOT16-relocated instruction is replaced by the
|
||
index of this GOT entry for the hipage. */
|
||
if ((rel + 1) < relend
|
||
&& ELF32_R_TYPE ((rel + 1)->r_info) == R_MIPS_LO16)
|
||
{
|
||
mips_elf_relocate_got_local (output_bfd, input_bfd, sgot,
|
||
rel, rel + 1,
|
||
contents,
|
||
relocation + addend);
|
||
r = bfd_reloc_ok;
|
||
}
|
||
else
|
||
r = bfd_reloc_outofrange;
|
||
}
|
||
else if (r_type == R_MIPS_CALL16
|
||
|| r_type == R_MIPS_GOT16
|
||
|| r_type == R_MIPS_CALL_LO16
|
||
|| r_type == R_MIPS_GOT_LO16)
|
||
{
|
||
bfd_vma offset;
|
||
|
||
/* This symbol must be registered as a global symbol
|
||
having the corresponding got entry. */
|
||
BFD_ASSERT (h->got_offset != (bfd_vma) -1);
|
||
|
||
offset = (h->dynindx - g->global_gotsym + g->local_gotno) * 4;
|
||
BFD_ASSERT (g->local_gotno <= offset
|
||
&& offset < sgot->_raw_size);
|
||
bfd_put_32 (output_bfd, relocation + addend,
|
||
sgot->contents + offset);
|
||
offset = (sgot->output_section->vma + sgot->output_offset
|
||
+ offset - gp);
|
||
mips_elf_relocate_global_got (input_bfd, rel, contents,
|
||
offset);
|
||
r = bfd_reloc_ok;
|
||
}
|
||
else if (r_type == R_MIPS_CALL_HI16
|
||
|| r_type == R_MIPS_GOT_HI16)
|
||
{
|
||
bfd_vma offset;
|
||
|
||
/* This must be a global symbol with a got entry. The
|
||
next reloc must be the corresponding LO16 reloc. */
|
||
BFD_ASSERT (h != NULL && h->got_offset != (bfd_vma) -1);
|
||
BFD_ASSERT ((rel + 1) < relend);
|
||
BFD_ASSERT (ELF32_R_TYPE ((rel + 1)->r_info)
|
||
== (r_type == R_MIPS_CALL_HI16
|
||
? R_MIPS_CALL_LO16
|
||
: R_MIPS_GOT_LO16));
|
||
|
||
offset = (h->dynindx - g->global_gotsym + g->local_gotno) * 4;
|
||
BFD_ASSERT (g->local_gotno <= offset
|
||
&& offset < sgot->_raw_size);
|
||
bfd_put_32 (output_bfd, relocation + addend,
|
||
sgot->contents + offset);
|
||
offset = (sgot->output_section->vma + sgot->output_offset
|
||
+ offset - gp);
|
||
mips_elf_relocate_hi16 (input_bfd, rel, rel + 1, contents,
|
||
offset);
|
||
r = bfd_reloc_ok;
|
||
}
|
||
else if (r_type == R_MIPS_REL32
|
||
|| r_type == R_MIPS_32)
|
||
{
|
||
Elf_Internal_Rel outrel;
|
||
Elf32_crinfo cptrel;
|
||
bfd_byte *cr;
|
||
|
||
if ((info->shared
|
||
|| (elf_hash_table (info)->dynamic_sections_created
|
||
&& h != NULL
|
||
&& ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)
|
||
== 0)))
|
||
&& (input_section->flags & SEC_ALLOC) != 0)
|
||
{
|
||
/* When generating a shared object, these
|
||
relocations are copied into the output file to be
|
||
resolved at run time. */
|
||
if (sreloc == NULL)
|
||
{
|
||
sreloc = bfd_get_section_by_name (dynobj, ".rel.dyn");
|
||
BFD_ASSERT (sreloc != NULL);
|
||
}
|
||
|
||
outrel.r_offset = (rel->r_offset
|
||
+ input_section->output_section->vma
|
||
+ input_section->output_offset);
|
||
|
||
addend = bfd_get_32 (input_bfd, contents + rel->r_offset);
|
||
|
||
if (h != NULL
|
||
&& (! info->symbolic
|
||
|| (h->elf_link_hash_flags
|
||
& ELF_LINK_HASH_DEF_REGULAR) == 0))
|
||
{
|
||
BFD_ASSERT (h->dynindx != -1);
|
||
outrel.r_info = ELF32_R_INFO (h->dynindx, R_MIPS_REL32);
|
||
sec = input_section;
|
||
}
|
||
else
|
||
{
|
||
long indx;
|
||
|
||
if (h == NULL)
|
||
sec = local_sections[r_symndx];
|
||
else
|
||
{
|
||
BFD_ASSERT (h->root.type == bfd_link_hash_defined
|
||
|| (h->root.type
|
||
== bfd_link_hash_defweak));
|
||
sec = h->root.u.def.section;
|
||
}
|
||
if (sec != NULL && bfd_is_abs_section (sec))
|
||
indx = 0;
|
||
else if (sec == NULL || sec->owner == NULL)
|
||
{
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return false;
|
||
}
|
||
else
|
||
{
|
||
asection *osec;
|
||
|
||
osec = sec->output_section;
|
||
indx = elf_section_data (osec)->dynindx;
|
||
if (indx == 0)
|
||
abort ();
|
||
}
|
||
|
||
outrel.r_info = ELF32_R_INFO (indx, R_MIPS_REL32);
|
||
addend += relocation;
|
||
}
|
||
|
||
bfd_put_32 (output_bfd, addend, contents + rel->r_offset);
|
||
bfd_elf32_swap_reloc_out (output_bfd, &outrel,
|
||
(((Elf32_External_Rel *)
|
||
sreloc->contents)
|
||
+ sreloc->reloc_count));
|
||
++sreloc->reloc_count;
|
||
|
||
if (SGI_COMPAT (output_bfd))
|
||
{
|
||
if (scpt == NULL)
|
||
continue;
|
||
|
||
/* Make an entry of compact relocation info. */
|
||
mips_elf_set_cr_format (cptrel, CRF_MIPS_LONG);
|
||
cptrel.vaddr = (rel->r_offset
|
||
+ input_section->output_section->vma
|
||
+ input_section->output_offset);
|
||
if (r_type == R_MIPS_REL32)
|
||
mips_elf_set_cr_type (cptrel, CRT_MIPS_REL32);
|
||
else
|
||
mips_elf_set_cr_type (cptrel, CRT_MIPS_WORD);
|
||
mips_elf_set_cr_dist2to (cptrel, 0);
|
||
cptrel.konst = addend;
|
||
|
||
cr = (scpt->contents
|
||
+ sizeof (Elf32_External_compact_rel));
|
||
bfd_elf32_swap_crinfo_out (output_bfd, &cptrel,
|
||
((Elf32_External_crinfo *) cr
|
||
+ scpt->reloc_count));
|
||
++scpt->reloc_count;
|
||
}
|
||
|
||
/* This reloc will be computed at runtime, so
|
||
there's no need to do anything now. */
|
||
continue;
|
||
}
|
||
else
|
||
r = _bfd_final_link_relocate (howto, input_bfd, input_section,
|
||
contents, rel->r_offset,
|
||
relocation, addend);
|
||
}
|
||
else
|
||
r = _bfd_final_link_relocate (howto, input_bfd, input_section,
|
||
contents, rel->r_offset,
|
||
relocation, addend);
|
||
|
||
if (SGI_COMPAT (abfd)
|
||
&& scpt != NULL
|
||
&& (input_section->flags & SEC_ALLOC) != 0)
|
||
{
|
||
Elf32_crinfo cptrel;
|
||
bfd_byte *cr;
|
||
|
||
/* Make an entry of compact relocation info. */
|
||
mips_elf_set_cr_format (cptrel, CRF_MIPS_LONG);
|
||
cptrel.vaddr = (rel->r_offset
|
||
+ input_section->output_section->vma
|
||
+ input_section->output_offset);
|
||
|
||
switch (r_type)
|
||
{
|
||
case R_MIPS_26:
|
||
mips_elf_set_cr_type (cptrel, CRT_MIPS_JMPAD);
|
||
/* XXX How should we set dist2to in this case. */
|
||
mips_elf_set_cr_dist2to (cptrel, 8);
|
||
cptrel.konst = addend + relocation;
|
||
cr = scpt->contents + sizeof (Elf32_External_compact_rel);
|
||
bfd_elf32_swap_crinfo_out (output_bfd, &cptrel,
|
||
((Elf32_External_crinfo *) cr
|
||
+ scpt->reloc_count));
|
||
++scpt->reloc_count;
|
||
break;
|
||
|
||
case R_MIPS_GPREL16:
|
||
case R_MIPS_LITERAL:
|
||
case R_MIPS_GPREL32:
|
||
mips_elf_set_cr_type (cptrel, CRT_MIPS_GPHI_LO);
|
||
cptrel.konst = gp - cptrel.vaddr;
|
||
mips_elf_set_cr_dist2to (cptrel, 4);
|
||
cr = scpt->contents + sizeof (Elf32_External_compact_rel);
|
||
bfd_elf32_swap_crinfo_out (output_bfd, &cptrel,
|
||
((Elf32_External_crinfo *) cr
|
||
+ scpt->reloc_count));
|
||
++scpt->reloc_count;
|
||
break;
|
||
|
||
default:
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
if (r != bfd_reloc_ok)
|
||
{
|
||
switch (r)
|
||
{
|
||
default:
|
||
case bfd_reloc_outofrange:
|
||
abort ();
|
||
case bfd_reloc_overflow:
|
||
{
|
||
const char *name;
|
||
|
||
if (h != NULL)
|
||
name = h->root.root.string;
|
||
else
|
||
{
|
||
name = bfd_elf_string_from_elf_section (input_bfd,
|
||
symtab_hdr->sh_link,
|
||
sym->st_name);
|
||
if (name == NULL)
|
||
return false;
|
||
if (*name == '\0')
|
||
name = bfd_section_name (input_bfd, sec);
|
||
}
|
||
if (! ((*info->callbacks->reloc_overflow)
|
||
(info, name, howto->name, (bfd_vma) 0,
|
||
input_bfd, input_section, rel->r_offset)))
|
||
return false;
|
||
}
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Functions for the dynamic linker. */
|
||
|
||
/* The name of the dynamic interpreter. This is put in the .interp
|
||
section. */
|
||
|
||
#define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
|
||
|
||
/* Create dynamic sections when linking against a dynamic object. */
|
||
|
||
static boolean
|
||
mips_elf_create_dynamic_sections (abfd, info)
|
||
bfd *abfd;
|
||
struct bfd_link_info *info;
|
||
{
|
||
struct elf_link_hash_entry *h;
|
||
flagword flags;
|
||
register asection *s;
|
||
const char * const *namep;
|
||
|
||
flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
|
||
| SEC_READONLY);
|
||
|
||
/* Mips ABI requests the .dynamic section to be read only. */
|
||
s = bfd_get_section_by_name (abfd, ".dynamic");
|
||
if (s != NULL)
|
||
{
|
||
if (! bfd_set_section_flags (abfd, s, flags))
|
||
return false;
|
||
}
|
||
|
||
/* We need to create .got section. */
|
||
if (! mips_elf_create_got_section (abfd, info))
|
||
return false;
|
||
|
||
/* Create .stub section. */
|
||
if (bfd_get_section_by_name (abfd, ".stub") == NULL)
|
||
{
|
||
s = bfd_make_section (abfd, ".stub");
|
||
if (s == NULL
|
||
|| ! bfd_set_section_flags (abfd, s, flags)
|
||
|| ! bfd_set_section_alignment (abfd, s, 2))
|
||
return false;
|
||
}
|
||
|
||
if (SGI_COMPAT (abfd)
|
||
&& !info->shared
|
||
&& bfd_get_section_by_name (abfd, ".rld_map") == NULL)
|
||
{
|
||
s = bfd_make_section (abfd, ".rld_map");
|
||
if (s == NULL
|
||
|| ! bfd_set_section_flags (abfd, s, flags & ~SEC_READONLY)
|
||
|| ! bfd_set_section_alignment (abfd, s, 2))
|
||
return false;
|
||
}
|
||
|
||
if (SGI_COMPAT (abfd))
|
||
{
|
||
for (namep = mips_elf_dynsym_rtproc_names; *namep != NULL; namep++)
|
||
{
|
||
h = NULL;
|
||
if (! (_bfd_generic_link_add_one_symbol
|
||
(info, abfd, *namep, BSF_GLOBAL, bfd_und_section_ptr,
|
||
(bfd_vma) 0, (const char *) NULL, false,
|
||
get_elf_backend_data (abfd)->collect,
|
||
(struct bfd_link_hash_entry **) &h)))
|
||
return false;
|
||
h->elf_link_hash_flags &=~ ELF_LINK_NON_ELF;
|
||
h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
|
||
h->type = STT_SECTION;
|
||
|
||
if (! bfd_elf32_link_record_dynamic_symbol (info, h))
|
||
return false;
|
||
}
|
||
|
||
/* We need to create a .compact_rel section. */
|
||
if (! mips_elf_create_compact_rel_section (abfd, info))
|
||
return false;
|
||
|
||
/* Change aligments of some sections. */
|
||
s = bfd_get_section_by_name (abfd, ".hash");
|
||
if (s != NULL)
|
||
bfd_set_section_alignment (abfd, s, 4);
|
||
s = bfd_get_section_by_name (abfd, ".dynsym");
|
||
if (s != NULL)
|
||
bfd_set_section_alignment (abfd, s, 4);
|
||
s = bfd_get_section_by_name (abfd, ".dynstr");
|
||
if (s != NULL)
|
||
bfd_set_section_alignment (abfd, s, 4);
|
||
s = bfd_get_section_by_name (abfd, ".reginfo");
|
||
if (s != NULL)
|
||
bfd_set_section_alignment (abfd, s, 4);
|
||
s = bfd_get_section_by_name (abfd, ".dynamic");
|
||
if (s != NULL)
|
||
bfd_set_section_alignment (abfd, s, 4);
|
||
}
|
||
|
||
if (!info->shared)
|
||
{
|
||
h = NULL;
|
||
if (! (_bfd_generic_link_add_one_symbol
|
||
(info, abfd, "_DYNAMIC_LINK", BSF_GLOBAL, bfd_abs_section_ptr,
|
||
(bfd_vma) 0, (const char *) NULL, false,
|
||
get_elf_backend_data (abfd)->collect,
|
||
(struct bfd_link_hash_entry **) &h)))
|
||
return false;
|
||
h->elf_link_hash_flags ^=~ ELF_LINK_NON_ELF;
|
||
h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
|
||
h->type = STT_SECTION;
|
||
|
||
if (! bfd_elf32_link_record_dynamic_symbol (info, h))
|
||
return false;
|
||
|
||
if (! mips_elf_hash_table (info)->use_rld_obj_head)
|
||
{
|
||
/* __rld_map is a four byte word located in the .data section
|
||
and is filled in by the rtld to contain a pointer to
|
||
the _r_debug structure. Its symbol value will be set in
|
||
mips_elf_finish_dynamic_symbol. */
|
||
s = bfd_get_section_by_name (abfd, ".rld_map");
|
||
BFD_ASSERT (s != NULL);
|
||
|
||
h = NULL;
|
||
if (! (_bfd_generic_link_add_one_symbol
|
||
(info, abfd, "__rld_map", BSF_GLOBAL, s,
|
||
(bfd_vma) 0, (const char *) NULL, false,
|
||
get_elf_backend_data (abfd)->collect,
|
||
(struct bfd_link_hash_entry **) &h)))
|
||
return false;
|
||
h->elf_link_hash_flags &=~ ELF_LINK_NON_ELF;
|
||
h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
|
||
h->type = STT_OBJECT;
|
||
|
||
if (! bfd_elf32_link_record_dynamic_symbol (info, h))
|
||
return false;
|
||
}
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Create the .compact_rel section. */
|
||
|
||
static boolean
|
||
mips_elf_create_compact_rel_section (abfd, info)
|
||
bfd *abfd;
|
||
struct bfd_link_info *info;
|
||
{
|
||
flagword flags;
|
||
register asection *s;
|
||
|
||
if (bfd_get_section_by_name (abfd, ".compact_rel") == NULL)
|
||
{
|
||
flags = SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_READONLY;
|
||
|
||
s = bfd_make_section (abfd, ".compact_rel");
|
||
if (s == NULL
|
||
|| ! bfd_set_section_flags (abfd, s, flags)
|
||
|| ! bfd_set_section_alignment (abfd, s, 2))
|
||
return false;
|
||
|
||
s->_raw_size = sizeof (Elf32_External_compact_rel);
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Create the .got section to hold the global offset table. */
|
||
|
||
static boolean
|
||
mips_elf_create_got_section (abfd, info)
|
||
bfd *abfd;
|
||
struct bfd_link_info *info;
|
||
{
|
||
flagword flags;
|
||
register asection *s;
|
||
struct elf_link_hash_entry *h;
|
||
struct mips_got_info *g;
|
||
|
||
/* This function may be called more than once. */
|
||
if (bfd_get_section_by_name (abfd, ".got") != NULL)
|
||
return true;
|
||
|
||
flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY;
|
||
|
||
s = bfd_make_section (abfd, ".got");
|
||
if (s == NULL
|
||
|| ! bfd_set_section_flags (abfd, s, flags)
|
||
|| ! bfd_set_section_alignment (abfd, s, 4))
|
||
return false;
|
||
|
||
/* Define the symbol _GLOBAL_OFFSET_TABLE_. We don't do this in the
|
||
linker script because we don't want to define the symbol if we
|
||
are not creating a global offset table. */
|
||
h = NULL;
|
||
if (! (_bfd_generic_link_add_one_symbol
|
||
(info, abfd, "_GLOBAL_OFFSET_TABLE_", BSF_GLOBAL, s,
|
||
(bfd_vma) 0, (const char *) NULL, false,
|
||
get_elf_backend_data (abfd)->collect,
|
||
(struct bfd_link_hash_entry **) &h)))
|
||
return false;
|
||
h->elf_link_hash_flags &=~ ELF_LINK_NON_ELF;
|
||
h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
|
||
h->type = STT_OBJECT;
|
||
|
||
if (info->shared
|
||
&& ! bfd_elf32_link_record_dynamic_symbol (info, h))
|
||
return false;
|
||
|
||
/* The first several global offset table entries are reserved. */
|
||
s->_raw_size = MIPS_RESERVED_GOTNO * 4;
|
||
|
||
g = (struct mips_got_info *) bfd_alloc (abfd,
|
||
sizeof (struct mips_got_info));
|
||
if (g == NULL)
|
||
return false;
|
||
g->global_gotsym = 0;
|
||
g->local_gotno = MIPS_RESERVED_GOTNO;
|
||
if (elf_section_data (s) == NULL)
|
||
{
|
||
s->used_by_bfd =
|
||
(PTR) bfd_zalloc (abfd, sizeof (struct bfd_elf_section_data));
|
||
if (elf_section_data (s) == NULL)
|
||
return false;
|
||
}
|
||
elf_section_data (s)->tdata = (PTR) g;
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Look through the relocs for a section during the first phase, and
|
||
allocate space in the global offset table. */
|
||
|
||
static boolean
|
||
mips_elf_check_relocs (abfd, info, sec, relocs)
|
||
bfd *abfd;
|
||
struct bfd_link_info *info;
|
||
asection *sec;
|
||
const Elf_Internal_Rela *relocs;
|
||
{
|
||
bfd *dynobj;
|
||
Elf_Internal_Shdr *symtab_hdr;
|
||
struct elf_link_hash_entry **sym_hashes;
|
||
struct mips_got_info *g;
|
||
size_t extsymoff;
|
||
const Elf_Internal_Rela *rel;
|
||
const Elf_Internal_Rela *rel_end;
|
||
asection *sgot;
|
||
asection *sreloc;
|
||
|
||
if (info->relocateable)
|
||
return true;
|
||
|
||
dynobj = elf_hash_table (info)->dynobj;
|
||
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
||
sym_hashes = elf_sym_hashes (abfd);
|
||
extsymoff = (elf_bad_symtab (abfd)) ? 0 : symtab_hdr->sh_info;
|
||
|
||
if (dynobj == NULL)
|
||
{
|
||
sgot = NULL;
|
||
g = NULL;
|
||
}
|
||
else
|
||
{
|
||
sgot = bfd_get_section_by_name (dynobj, ".got");
|
||
BFD_ASSERT (elf_section_data (sgot) != NULL);
|
||
g = (struct mips_got_info *) elf_section_data (sgot)->tdata;
|
||
BFD_ASSERT (g != NULL);
|
||
}
|
||
|
||
sreloc = NULL;
|
||
|
||
rel_end = relocs + sec->reloc_count;
|
||
for (rel = relocs; rel < rel_end; rel++)
|
||
{
|
||
unsigned long r_symndx;
|
||
struct elf_link_hash_entry *h;
|
||
|
||
r_symndx = ELF32_R_SYM (rel->r_info);
|
||
|
||
if (r_symndx < extsymoff)
|
||
h = NULL;
|
||
else
|
||
h = sym_hashes[r_symndx - extsymoff];
|
||
|
||
/* Some relocs require a global offset table. */
|
||
if (dynobj == NULL || sgot == NULL)
|
||
{
|
||
switch (ELF32_R_TYPE (rel->r_info))
|
||
{
|
||
case R_MIPS_GOT16:
|
||
case R_MIPS_CALL16:
|
||
case R_MIPS_CALL_HI16:
|
||
case R_MIPS_CALL_LO16:
|
||
case R_MIPS_GOT_HI16:
|
||
case R_MIPS_GOT_LO16:
|
||
if (dynobj == NULL)
|
||
elf_hash_table (info)->dynobj = dynobj = abfd;
|
||
if (! mips_elf_create_got_section (dynobj, info))
|
||
return false;
|
||
sgot = bfd_get_section_by_name (dynobj, ".got");
|
||
BFD_ASSERT (sgot != NULL);
|
||
BFD_ASSERT (elf_section_data (sgot) != NULL);
|
||
g = (struct mips_got_info *) elf_section_data (sgot)->tdata;
|
||
BFD_ASSERT (g != NULL);
|
||
break;
|
||
|
||
case R_MIPS_32:
|
||
case R_MIPS_REL32:
|
||
if (dynobj == NULL
|
||
&& (info->shared || h != NULL)
|
||
&& (sec->flags & SEC_ALLOC) != 0)
|
||
elf_hash_table (info)->dynobj = dynobj = abfd;
|
||
break;
|
||
|
||
default:
|
||
break;
|
||
}
|
||
}
|
||
|
||
switch (ELF32_R_TYPE (rel->r_info))
|
||
{
|
||
case R_MIPS_CALL16:
|
||
case R_MIPS_CALL_HI16:
|
||
case R_MIPS_CALL_LO16:
|
||
/* This symbol requires a global offset table entry. */
|
||
|
||
BFD_ASSERT (h != NULL);
|
||
|
||
/* Make sure this symbol is output as a dynamic symbol. */
|
||
if (h->dynindx == -1)
|
||
{
|
||
if (! bfd_elf32_link_record_dynamic_symbol (info, h))
|
||
return false;
|
||
}
|
||
|
||
if (h->got_offset != (bfd_vma) -1)
|
||
{
|
||
/* We have already allocated space in the .got. */
|
||
break;
|
||
}
|
||
|
||
/* Note the index of the first global got symbol in .dynsym. */
|
||
if (g->global_gotsym == 0
|
||
|| g->global_gotsym > (unsigned long) h->dynindx)
|
||
g->global_gotsym = h->dynindx;
|
||
|
||
/* Make this symbol to have the corresponding got entry. */
|
||
h->got_offset = 0;
|
||
|
||
/* We need a stub, not a plt entry for the undefined
|
||
function. But we record it as if it needs plt. See
|
||
elf_adjust_dynamic_symbol in elflink.h. */
|
||
h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
|
||
h->type = STT_FUNC;
|
||
|
||
break;
|
||
|
||
case R_MIPS_GOT16:
|
||
case R_MIPS_GOT_HI16:
|
||
case R_MIPS_GOT_LO16:
|
||
/* This symbol requires a global offset table entry. */
|
||
|
||
if (h != NULL)
|
||
{
|
||
/* Make sure this symbol is output as a dynamic symbol. */
|
||
if (h->dynindx == -1)
|
||
{
|
||
if (! bfd_elf32_link_record_dynamic_symbol (info, h))
|
||
return false;
|
||
}
|
||
|
||
if (h->got_offset != (bfd_vma) -1)
|
||
{
|
||
/* We have already allocated space in the .got. */
|
||
break;
|
||
}
|
||
/* Note the index of the first global got symbol in
|
||
.dynsym. */
|
||
if (g->global_gotsym == 0
|
||
|| g->global_gotsym > (unsigned long) h->dynindx)
|
||
g->global_gotsym = h->dynindx;
|
||
|
||
/* Make this symbol to be the global got symbol. */
|
||
h->got_offset = 0;
|
||
}
|
||
|
||
break;
|
||
|
||
case R_MIPS_32:
|
||
case R_MIPS_REL32:
|
||
if ((info->shared || h != NULL)
|
||
&& (sec->flags & SEC_ALLOC) != 0)
|
||
{
|
||
if (sreloc == NULL)
|
||
{
|
||
const char *name = ".rel.dyn";
|
||
|
||
sreloc = bfd_get_section_by_name (dynobj, name);
|
||
if (sreloc == NULL)
|
||
{
|
||
sreloc = bfd_make_section (dynobj, name);
|
||
if (sreloc == NULL
|
||
|| ! bfd_set_section_flags (dynobj, sreloc,
|
||
(SEC_ALLOC
|
||
| SEC_LOAD
|
||
| SEC_HAS_CONTENTS
|
||
| SEC_IN_MEMORY
|
||
| SEC_READONLY))
|
||
|| ! bfd_set_section_alignment (dynobj, sreloc,
|
||
4))
|
||
return false;
|
||
}
|
||
}
|
||
if (info->shared)
|
||
{
|
||
/* When creating a shared object, we must copy these
|
||
reloc types into the output file as R_MIPS_REL32
|
||
relocs. We make room for this reloc in the
|
||
.rel.dyn reloc section */
|
||
if (sreloc->_raw_size == 0)
|
||
{
|
||
/* Add a null element. */
|
||
sreloc->_raw_size += sizeof (Elf32_External_Rel);
|
||
++sreloc->reloc_count;
|
||
}
|
||
sreloc->_raw_size += sizeof (Elf32_External_Rel);
|
||
}
|
||
else
|
||
{
|
||
struct mips_elf_link_hash_entry *hmips;
|
||
|
||
/* We only need to copy this reloc if the symbol is
|
||
defined in a dynamic object. */
|
||
hmips = (struct mips_elf_link_hash_entry *) h;
|
||
++hmips->mips_32_relocs;
|
||
}
|
||
}
|
||
|
||
if (SGI_COMPAT (abfd))
|
||
mips_elf_hash_table (info)->compact_rel_size +=
|
||
sizeof (Elf32_External_crinfo);
|
||
|
||
break;
|
||
|
||
case R_MIPS_26:
|
||
case R_MIPS_GPREL16:
|
||
case R_MIPS_LITERAL:
|
||
case R_MIPS_GPREL32:
|
||
if (SGI_COMPAT (abfd))
|
||
mips_elf_hash_table (info)->compact_rel_size +=
|
||
sizeof (Elf32_External_crinfo);
|
||
break;
|
||
|
||
default:
|
||
break;
|
||
}
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Adjust a symbol defined by a dynamic object and referenced by a
|
||
regular object. The current definition is in some section of the
|
||
dynamic object, but we're not including those sections. We have to
|
||
change the definition to something the rest of the link can
|
||
understand. */
|
||
|
||
static boolean
|
||
mips_elf_adjust_dynamic_symbol (info, h)
|
||
struct bfd_link_info *info;
|
||
struct elf_link_hash_entry *h;
|
||
{
|
||
bfd *dynobj;
|
||
struct mips_elf_link_hash_entry *hmips;
|
||
asection *s;
|
||
|
||
dynobj = elf_hash_table (info)->dynobj;
|
||
|
||
/* Make sure we know what is going on here. */
|
||
BFD_ASSERT (dynobj != NULL
|
||
&& ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT)
|
||
|| h->weakdef != NULL
|
||
|| ((h->elf_link_hash_flags
|
||
& ELF_LINK_HASH_DEF_DYNAMIC) != 0
|
||
&& (h->elf_link_hash_flags
|
||
& ELF_LINK_HASH_REF_REGULAR) != 0
|
||
&& (h->elf_link_hash_flags
|
||
& ELF_LINK_HASH_DEF_REGULAR) == 0)));
|
||
|
||
/* If this symbol is defined in a dynamic object, we need to copy
|
||
any R_MIPS_32 or R_MIPS_REL32 relocs against it into the output
|
||
file. */
|
||
hmips = (struct mips_elf_link_hash_entry *) h;
|
||
if (! info->relocateable
|
||
&& hmips->mips_32_relocs != 0
|
||
&& (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
|
||
{
|
||
s = bfd_get_section_by_name (dynobj, ".rel.dyn");
|
||
BFD_ASSERT (s != NULL);
|
||
|
||
if (s->_raw_size == 0)
|
||
{
|
||
/* Make room for a null element. */
|
||
s->_raw_size += sizeof (Elf32_External_Rel);
|
||
++s->reloc_count;
|
||
}
|
||
s->_raw_size += hmips->mips_32_relocs * sizeof (Elf32_External_Rel);
|
||
}
|
||
|
||
/* For a function, create a stub, if needed. */
|
||
if (h->type == STT_FUNC
|
||
|| (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
|
||
{
|
||
if (! elf_hash_table (info)->dynamic_sections_created)
|
||
return true;
|
||
|
||
/* If this symbol is not defined in a regular file, then set
|
||
the symbol to the stub location. This is required to make
|
||
function pointers compare as equal between the normal
|
||
executable and the shared library. */
|
||
if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
|
||
{
|
||
/* We need .stub section. */
|
||
s = bfd_get_section_by_name (dynobj, ".stub");
|
||
BFD_ASSERT (s != NULL);
|
||
|
||
h->root.u.def.section = s;
|
||
h->root.u.def.value = s->_raw_size;
|
||
|
||
/* XXX Write this stub address somewhere. */
|
||
h->plt_offset = s->_raw_size;
|
||
|
||
/* Make room for this stub code. */
|
||
s->_raw_size += MIPS_FUNCTION_STUB_SIZE;
|
||
|
||
/* The last half word of the stub will be filled with the index
|
||
of this symbol in .dynsym section. */
|
||
return true;
|
||
}
|
||
}
|
||
|
||
/* If this is a weak symbol, and there is a real definition, the
|
||
processor independent code will have arranged for us to see the
|
||
real definition first, and we can just use the same value. */
|
||
if (h->weakdef != NULL)
|
||
{
|
||
BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
|
||
|| h->weakdef->root.type == bfd_link_hash_defweak);
|
||
h->root.u.def.section = h->weakdef->root.u.def.section;
|
||
h->root.u.def.value = h->weakdef->root.u.def.value;
|
||
return true;
|
||
}
|
||
|
||
/* This is a reference to a symbol defined by a dynamic object which
|
||
is not a function. */
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Set the sizes of the dynamic sections. */
|
||
|
||
static boolean
|
||
mips_elf_size_dynamic_sections (output_bfd, info)
|
||
bfd *output_bfd;
|
||
struct bfd_link_info *info;
|
||
{
|
||
bfd *dynobj;
|
||
asection *s;
|
||
boolean reltext;
|
||
asection *sgot;
|
||
struct mips_got_info *g;
|
||
|
||
dynobj = elf_hash_table (info)->dynobj;
|
||
BFD_ASSERT (dynobj != NULL);
|
||
|
||
if (elf_hash_table (info)->dynamic_sections_created)
|
||
{
|
||
/* Set the contents of the .interp section to the interpreter. */
|
||
if (! info->shared)
|
||
{
|
||
s = bfd_get_section_by_name (dynobj, ".interp");
|
||
BFD_ASSERT (s != NULL);
|
||
s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
|
||
s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
|
||
}
|
||
}
|
||
|
||
/* Recompute the size of .got for local entires (reserved and
|
||
hipages) if needed. To estimate it, get the upper bound of total
|
||
size of loadable sections. */
|
||
sgot = bfd_get_section_by_name (dynobj, ".got");
|
||
|
||
if (sgot != NULL)
|
||
{
|
||
bfd_size_type loadable_size = 0;
|
||
bfd_size_type local_gotno;
|
||
struct _bfd *sub;
|
||
|
||
BFD_ASSERT (elf_section_data (sgot) != NULL);
|
||
g = (struct mips_got_info *) elf_section_data (sgot)->tdata;
|
||
BFD_ASSERT (g != NULL);
|
||
|
||
for (sub = info->input_bfds; sub; sub = sub->link_next)
|
||
for (s = sub->sections; s != NULL; s = s->next)
|
||
{
|
||
if ((s->flags & SEC_ALLOC) == 0)
|
||
continue;
|
||
loadable_size += (s->_raw_size + 0xf) & ~0xf;
|
||
}
|
||
|
||
loadable_size += MIPS_FUNCTION_STUB_SIZE;
|
||
|
||
/* Assume there are two loadable segments consisting of
|
||
contiguous sections. Is 5 enough? */
|
||
local_gotno = (loadable_size >> 16) + 5 + MIPS_RESERVED_GOTNO;
|
||
g->local_gotno = local_gotno;
|
||
sgot->_raw_size += local_gotno * 4;
|
||
}
|
||
|
||
/* The check_relocs and adjust_dynamic_symbol entry points have
|
||
determined the sizes of the various dynamic sections. Allocate
|
||
memory for them. */
|
||
reltext = false;
|
||
for (s = dynobj->sections; s != NULL; s = s->next)
|
||
{
|
||
const char *name;
|
||
boolean strip;
|
||
|
||
/* It's OK to base decisions on the section name, because none
|
||
of the dynobj section names depend upon the input files. */
|
||
name = bfd_get_section_name (dynobj, s);
|
||
|
||
if ((s->flags & SEC_IN_MEMORY) == 0)
|
||
continue;
|
||
|
||
strip = false;
|
||
|
||
if (strncmp (name, ".rel", 4) == 0)
|
||
{
|
||
if (s->_raw_size == 0)
|
||
strip = true;
|
||
else
|
||
{
|
||
asection *target;
|
||
|
||
/* If this relocation section applies to a read only
|
||
section, then we probably need a DT_TEXTREL entry.
|
||
If the relocation section is .rel.dyn, we always
|
||
assert a DT_TEXTREL entry rather than testing whether
|
||
there exists a relocation to a read only section or
|
||
not. */
|
||
target = bfd_get_section_by_name (output_bfd, name + 4);
|
||
if ((target != NULL && (target->flags & SEC_READONLY) != 0)
|
||
|| strcmp (name, ".rel.dyn") == 0)
|
||
reltext = true;
|
||
|
||
/* We use the reloc_count field as a counter if we need
|
||
to copy relocs into the output file. */
|
||
if (strcmp (name, ".rel.dyn") != 0)
|
||
s->reloc_count = 0;
|
||
}
|
||
}
|
||
else if (strncmp (name, ".got", 4) == 0)
|
||
{
|
||
int i;
|
||
|
||
BFD_ASSERT (elf_section_data (s) != NULL);
|
||
g = (struct mips_got_info *) elf_section_data (s)->tdata;
|
||
BFD_ASSERT (g != NULL);
|
||
|
||
/* Fix the size of .got section for the correspondence of
|
||
global symbols and got entries. This adds some useless
|
||
got entries. Is this required by ABI really? */
|
||
i = elf_hash_table (info)->dynsymcount - g->global_gotsym;
|
||
s->_raw_size += i * 4;
|
||
}
|
||
else if (strncmp (name, ".stub", 5) == 0)
|
||
{
|
||
/* Irix rld assumes that the function stub isn't at the end
|
||
of .text section. So put a dummy. XXX */
|
||
s->_raw_size += MIPS_FUNCTION_STUB_SIZE;
|
||
}
|
||
else if (! info->shared
|
||
&& ! mips_elf_hash_table (info)->use_rld_obj_head
|
||
&& strncmp (name, ".rld_map", 8) == 0)
|
||
{
|
||
/* We add a room for __rld_map. It will be filled in by the
|
||
rtld to contain a pointer to the _r_debug structure. */
|
||
s->_raw_size += 4;
|
||
}
|
||
else if (SGI_COMPAT (output_bfd)
|
||
&& strncmp (name, ".compact_rel", 12) == 0)
|
||
s->_raw_size += mips_elf_hash_table (info)->compact_rel_size;
|
||
else if (strncmp (name, ".init", 5) != 0)
|
||
{
|
||
/* It's not one of our sections, so don't allocate space. */
|
||
continue;
|
||
}
|
||
|
||
if (strip)
|
||
{
|
||
asection **spp;
|
||
|
||
for (spp = &s->output_section->owner->sections;
|
||
*spp != s->output_section;
|
||
spp = &(*spp)->next)
|
||
;
|
||
*spp = s->output_section->next;
|
||
--s->output_section->owner->section_count;
|
||
|
||
continue;
|
||
}
|
||
|
||
/* Allocate memory for the section contents. */
|
||
s->contents = (bfd_byte *) bfd_alloc (dynobj, s->_raw_size);
|
||
if (s->contents == NULL && s->_raw_size != 0)
|
||
{
|
||
bfd_set_error (bfd_error_no_memory);
|
||
return false;
|
||
}
|
||
memset (s->contents, 0, s->_raw_size);
|
||
}
|
||
|
||
if (elf_hash_table (info)->dynamic_sections_created)
|
||
{
|
||
/* Add some entries to the .dynamic section. We fill in the
|
||
values later, in elf_mips_finish_dynamic_sections, but we
|
||
must add the entries now so that we get the correct size for
|
||
the .dynamic section. The DT_DEBUG entry is filled in by the
|
||
dynamic linker and used by the debugger. */
|
||
if (! info->shared)
|
||
{
|
||
if (SGI_COMPAT (output_bfd))
|
||
{
|
||
/* SGI object has the equivalence of DT_DEBUG in the
|
||
DT_MIPS_RLD_MAP entry. */
|
||
if (! bfd_elf32_add_dynamic_entry (info, DT_MIPS_RLD_MAP, 0))
|
||
return false;
|
||
}
|
||
else
|
||
if (! bfd_elf32_add_dynamic_entry (info, DT_DEBUG, 0))
|
||
return false;
|
||
}
|
||
|
||
if (reltext)
|
||
{
|
||
if (! bfd_elf32_add_dynamic_entry (info, DT_TEXTREL, 0))
|
||
return false;
|
||
}
|
||
|
||
if (! bfd_elf32_add_dynamic_entry (info, DT_PLTGOT, 0))
|
||
return false;
|
||
|
||
if (bfd_get_section_by_name (dynobj, ".rel.dyn"))
|
||
{
|
||
if (! bfd_elf32_add_dynamic_entry (info, DT_REL, 0))
|
||
return false;
|
||
|
||
if (! bfd_elf32_add_dynamic_entry (info, DT_RELSZ, 0))
|
||
return false;
|
||
|
||
if (! bfd_elf32_add_dynamic_entry (info, DT_RELENT, 0))
|
||
return false;
|
||
}
|
||
|
||
if (! bfd_elf32_add_dynamic_entry (info, DT_MIPS_CONFLICTNO, 0))
|
||
return false;
|
||
|
||
if (! bfd_elf32_add_dynamic_entry (info, DT_MIPS_LIBLISTNO, 0))
|
||
return false;
|
||
|
||
if (bfd_get_section_by_name (dynobj, ".conflict") != NULL)
|
||
{
|
||
if (! bfd_elf32_add_dynamic_entry (info, DT_MIPS_CONFLICT, 0))
|
||
return false;
|
||
|
||
s = bfd_get_section_by_name (dynobj, ".liblist");
|
||
BFD_ASSERT (s != NULL);
|
||
|
||
if (! bfd_elf32_add_dynamic_entry (info, DT_MIPS_LIBLIST, 0))
|
||
return false;
|
||
}
|
||
|
||
if (! bfd_elf32_add_dynamic_entry (info, DT_MIPS_RLD_VERSION, 0))
|
||
return false;
|
||
|
||
if (! bfd_elf32_add_dynamic_entry (info, DT_MIPS_FLAGS, 0))
|
||
return false;
|
||
|
||
#if 0
|
||
/* Time stamps in executable files are a bad idea. */
|
||
if (! bfd_elf32_add_dynamic_entry (info, DT_MIPS_TIME_STAMP, 0))
|
||
return false;
|
||
#endif
|
||
|
||
#if 0 /* FIXME */
|
||
if (! bfd_elf32_add_dynamic_entry (info, DT_MIPS_ICHECKSUM, 0))
|
||
return false;
|
||
#endif
|
||
|
||
#if 0 /* FIXME */
|
||
if (! bfd_elf32_add_dynamic_entry (info, DT_MIPS_IVERSION, 0))
|
||
return false;
|
||
#endif
|
||
|
||
if (! bfd_elf32_add_dynamic_entry (info, DT_MIPS_BASE_ADDRESS, 0))
|
||
return false;
|
||
|
||
if (! bfd_elf32_add_dynamic_entry (info, DT_MIPS_LOCAL_GOTNO, 0))
|
||
return false;
|
||
|
||
if (! bfd_elf32_add_dynamic_entry (info, DT_MIPS_SYMTABNO, 0))
|
||
return false;
|
||
|
||
if (! bfd_elf32_add_dynamic_entry (info, DT_MIPS_UNREFEXTNO, 0))
|
||
return false;
|
||
|
||
if (! bfd_elf32_add_dynamic_entry (info, DT_MIPS_GOTSYM, 0))
|
||
return false;
|
||
|
||
if (! bfd_elf32_add_dynamic_entry (info, DT_MIPS_HIPAGENO, 0))
|
||
return false;
|
||
|
||
#if 0 /* (SGI_COMPAT) */
|
||
if (! bfd_get_section_by_name (dynobj, ".init"))
|
||
if (! bfd_elf32_add_dynamic_entry (info, DT_INIT, 0))
|
||
return false;
|
||
|
||
if (! bfd_get_section_by_name (dynobj, ".fini"))
|
||
if (! bfd_elf32_add_dynamic_entry (info, DT_FINI, 0))
|
||
return false;
|
||
#endif
|
||
}
|
||
|
||
/* If we use dynamic linking, we generate a section symbol for each
|
||
output section. These are local symbols, which means that they
|
||
must come first in the dynamic symbol table.
|
||
That means we must increment the dynamic symbol index of every
|
||
other dynamic symbol. */
|
||
{
|
||
const char * const *namep;
|
||
unsigned int c, i;
|
||
bfd_size_type strindex;
|
||
struct bfd_strtab_hash *dynstr;
|
||
struct mips_got_info *g;
|
||
|
||
c = 0;
|
||
if (elf_hash_table (info)->dynamic_sections_created)
|
||
{
|
||
if (SGI_COMPAT (output_bfd))
|
||
{
|
||
c = SIZEOF_MIPS_DYNSYM_SECNAMES - 1;
|
||
elf_link_hash_traverse (elf_hash_table (info),
|
||
mips_elf_adjust_dynindx,
|
||
(PTR) &c);
|
||
elf_hash_table (info)->dynsymcount += c;
|
||
|
||
dynstr = elf_hash_table (info)->dynstr;
|
||
BFD_ASSERT (dynstr != NULL);
|
||
|
||
for (i = 1, namep = mips_elf_dynsym_sec_names;
|
||
*namep != NULL;
|
||
i++, namep++)
|
||
{
|
||
s = bfd_get_section_by_name (output_bfd, *namep);
|
||
if (s != NULL)
|
||
elf_section_data (s)->dynindx = i;
|
||
|
||
strindex = _bfd_stringtab_add (dynstr, *namep, true, false);
|
||
if (strindex == (bfd_size_type) -1)
|
||
return false;
|
||
|
||
mips_elf_hash_table (info)->dynsym_sec_strindex[i] = strindex;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
c = bfd_count_sections (output_bfd);
|
||
elf_link_hash_traverse (elf_hash_table (info),
|
||
mips_elf_adjust_dynindx,
|
||
(PTR) &c);
|
||
elf_hash_table (info)->dynsymcount += c;
|
||
|
||
for (i = 1, s = output_bfd->sections; s != NULL; s = s->next, i++)
|
||
{
|
||
elf_section_data (s)->dynindx = i;
|
||
/* These symbols will have no names, so we don't need to
|
||
fiddle with dynstr_index. */
|
||
}
|
||
}
|
||
}
|
||
|
||
if (sgot != NULL)
|
||
{
|
||
BFD_ASSERT (elf_section_data (sgot) != NULL);
|
||
g = (struct mips_got_info *) elf_section_data (sgot)->tdata;
|
||
BFD_ASSERT (g != NULL);
|
||
|
||
/* If there are no global got symbols, fake the last symbol so
|
||
for safety. */
|
||
if (g->global_gotsym)
|
||
g->global_gotsym += c;
|
||
else
|
||
g->global_gotsym = elf_hash_table (info)->dynsymcount - 1;
|
||
}
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Increment the index of a dynamic symbol by a given amount. Called
|
||
via elf_link_hash_traverse. */
|
||
|
||
static boolean
|
||
mips_elf_adjust_dynindx (h, cparg)
|
||
struct elf_link_hash_entry *h;
|
||
PTR cparg;
|
||
{
|
||
unsigned int *cp = (unsigned int *) cparg;
|
||
|
||
if (h->dynindx != -1)
|
||
h->dynindx += *cp;
|
||
return true;
|
||
}
|
||
|
||
/* Finish up dynamic symbol handling. We set the contents of various
|
||
dynamic sections here. */
|
||
|
||
static boolean
|
||
mips_elf_finish_dynamic_symbol (output_bfd, info, h, sym)
|
||
bfd *output_bfd;
|
||
struct bfd_link_info *info;
|
||
struct elf_link_hash_entry *h;
|
||
Elf_Internal_Sym *sym;
|
||
{
|
||
bfd *dynobj;
|
||
bfd_vma gval;
|
||
asection *sgot;
|
||
struct mips_got_info *g;
|
||
const char *name;
|
||
|
||
dynobj = elf_hash_table (info)->dynobj;
|
||
gval = sym->st_value;
|
||
|
||
if (h->plt_offset != (bfd_vma) -1)
|
||
{
|
||
asection *s;
|
||
bfd_byte *p;
|
||
bfd_byte stub[MIPS_FUNCTION_STUB_SIZE];
|
||
|
||
/* This symbol has a stub. Set it up. */
|
||
|
||
BFD_ASSERT (h->dynindx != -1);
|
||
|
||
s = bfd_get_section_by_name (dynobj, ".stub");
|
||
BFD_ASSERT (s != NULL);
|
||
|
||
/* Fill the stub. */
|
||
p = stub;
|
||
bfd_put_32 (output_bfd, STUB_LW(output_bfd), p);
|
||
p += 4;
|
||
bfd_put_32 (output_bfd, STUB_MOVE, p);
|
||
p += 4;
|
||
|
||
/* FIXME: Can h->dynindex be more than 64K? */
|
||
if (h->dynindx & 0xffff0000)
|
||
return false;
|
||
|
||
bfd_put_32 (output_bfd, STUB_JALR, p);
|
||
p += 4;
|
||
bfd_put_32 (output_bfd, STUB_LI16 + h->dynindx, p);
|
||
|
||
BFD_ASSERT (h->plt_offset <= s->_raw_size);
|
||
memcpy (s->contents + h->plt_offset, stub, MIPS_FUNCTION_STUB_SIZE);
|
||
|
||
/* Mark the symbol as undefined. plt_offset != -1 occurs
|
||
only for the referenced symbol. */
|
||
sym->st_shndx = SHN_UNDEF;
|
||
|
||
/* The run-time linker uses the st_value field of the symbol
|
||
to reset the global offset table entry for this external
|
||
to its stub address when unlinking a shared object. */
|
||
gval = s->output_section->vma + s->output_offset + h->plt_offset;
|
||
sym->st_value = gval;
|
||
}
|
||
|
||
BFD_ASSERT (h->dynindx != -1);
|
||
|
||
sgot = bfd_get_section_by_name (dynobj, ".got");
|
||
BFD_ASSERT (sgot != NULL);
|
||
BFD_ASSERT (elf_section_data (sgot) != NULL);
|
||
g = (struct mips_got_info *) elf_section_data (sgot)->tdata;
|
||
BFD_ASSERT (g != NULL);
|
||
|
||
if ((unsigned long) h->dynindx >= g->global_gotsym)
|
||
{
|
||
bfd_size_type offset;
|
||
|
||
/* This symbol has an entry in the global offset table. Set its
|
||
value to the corresponding got entry, if needed. */
|
||
if (h->got_offset == (bfd_vma) -1)
|
||
{
|
||
offset = (h->dynindx - g->global_gotsym + g->local_gotno) * 4;
|
||
BFD_ASSERT (g->local_gotno * 4 <= offset
|
||
&& offset < sgot->_raw_size);
|
||
bfd_put_32 (output_bfd, gval, sgot->contents + offset);
|
||
}
|
||
}
|
||
|
||
/* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
|
||
name = h->root.root.string;
|
||
if (strcmp (name, "_DYNAMIC") == 0
|
||
|| strcmp (name, "_GLOBAL_OFFSET_TABLE_") == 0)
|
||
sym->st_shndx = SHN_ABS;
|
||
else if (strcmp (name, "_DYNAMIC_LINK") == 0)
|
||
{
|
||
sym->st_shndx = SHN_ABS;
|
||
sym->st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION);
|
||
sym->st_value = 1;
|
||
}
|
||
else if (SGI_COMPAT (output_bfd))
|
||
{
|
||
if (strcmp (name, "_gp_disp") == 0)
|
||
{
|
||
sym->st_shndx = SHN_ABS;
|
||
sym->st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION);
|
||
sym->st_value = elf_gp (output_bfd);
|
||
}
|
||
else if (strcmp (name, mips_elf_dynsym_rtproc_names[0]) == 0
|
||
|| strcmp (name, mips_elf_dynsym_rtproc_names[1]) == 0)
|
||
{
|
||
sym->st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION);
|
||
sym->st_other = STO_PROTECTED;
|
||
sym->st_value = 0;
|
||
sym->st_shndx = SHN_MIPS_DATA;
|
||
}
|
||
else if (strcmp (name, mips_elf_dynsym_rtproc_names[2]) == 0)
|
||
{
|
||
sym->st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION);
|
||
sym->st_other = STO_PROTECTED;
|
||
sym->st_value = mips_elf_hash_table (info)->procedure_count;
|
||
sym->st_shndx = SHN_ABS;
|
||
}
|
||
else if (sym->st_shndx != SHN_UNDEF)
|
||
{
|
||
if (h->type == STT_FUNC)
|
||
sym->st_shndx = SHN_MIPS_TEXT;
|
||
else if (h->type == STT_OBJECT)
|
||
sym->st_shndx = SHN_MIPS_DATA;
|
||
}
|
||
}
|
||
|
||
if (SGI_COMPAT (output_bfd)
|
||
&& ! info->shared)
|
||
{
|
||
if (! mips_elf_hash_table (info)->use_rld_obj_head
|
||
&& strcmp (name, "__rld_map") == 0)
|
||
{
|
||
asection *s = bfd_get_section_by_name (dynobj, ".rld_map");
|
||
BFD_ASSERT (s != NULL);
|
||
sym->st_value = s->output_section->vma + s->output_offset;
|
||
bfd_put_32 (output_bfd, (bfd_vma) 0, s->contents);
|
||
if (mips_elf_hash_table (info)->rld_value == 0)
|
||
mips_elf_hash_table (info)->rld_value = sym->st_value;
|
||
}
|
||
else if (mips_elf_hash_table (info)->use_rld_obj_head
|
||
&& strcmp (name, "__rld_obj_head") == 0)
|
||
{
|
||
asection *s = bfd_get_section_by_name (dynobj, ".rld_map");
|
||
BFD_ASSERT (s != NULL);
|
||
mips_elf_hash_table (info)->rld_value = sym->st_value;
|
||
}
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Finish up the dynamic sections. */
|
||
|
||
static boolean
|
||
mips_elf_finish_dynamic_sections (output_bfd, info)
|
||
bfd *output_bfd;
|
||
struct bfd_link_info *info;
|
||
{
|
||
bfd *dynobj;
|
||
asection *sdyn;
|
||
asection *sgot;
|
||
struct mips_got_info *g;
|
||
|
||
dynobj = elf_hash_table (info)->dynobj;
|
||
|
||
sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
|
||
|
||
sgot = bfd_get_section_by_name (dynobj, ".got");
|
||
if (sgot == NULL)
|
||
g = NULL;
|
||
else
|
||
{
|
||
BFD_ASSERT (elf_section_data (sgot) != NULL);
|
||
g = (struct mips_got_info *) elf_section_data (sgot)->tdata;
|
||
BFD_ASSERT (g != NULL);
|
||
}
|
||
|
||
if (elf_hash_table (info)->dynamic_sections_created)
|
||
{
|
||
Elf32_External_Dyn *dyncon, *dynconend;
|
||
|
||
BFD_ASSERT (sdyn != NULL);
|
||
BFD_ASSERT (g != NULL);
|
||
|
||
dyncon = (Elf32_External_Dyn *) sdyn->contents;
|
||
dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
|
||
for (; dyncon < dynconend; dyncon++)
|
||
{
|
||
Elf_Internal_Dyn dyn;
|
||
const char *name;
|
||
size_t elemsize;
|
||
asection *s;
|
||
|
||
bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
|
||
|
||
switch (dyn.d_tag)
|
||
{
|
||
default:
|
||
break;
|
||
|
||
case DT_RELENT:
|
||
s = bfd_get_section_by_name (dynobj, ".rel.dyn");
|
||
BFD_ASSERT (s != NULL);
|
||
dyn.d_un.d_val = sizeof (Elf32_External_Rel);
|
||
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
|
||
break;
|
||
|
||
case DT_STRSZ:
|
||
/* Rewrite DT_STRSZ. */
|
||
dyn.d_un.d_val =
|
||
_bfd_stringtab_size (elf_hash_table (info)->dynstr);
|
||
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
|
||
break;
|
||
|
||
case DT_PLTGOT:
|
||
name = ".got";
|
||
goto get_vma;
|
||
case DT_MIPS_CONFLICT:
|
||
name = ".conflict";
|
||
goto get_vma;
|
||
case DT_MIPS_LIBLIST:
|
||
name = ".liblist";
|
||
get_vma:
|
||
s = bfd_get_section_by_name (output_bfd, name);
|
||
BFD_ASSERT (s != NULL);
|
||
dyn.d_un.d_ptr = s->vma;
|
||
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
|
||
break;
|
||
|
||
case DT_MIPS_RLD_VERSION:
|
||
dyn.d_un.d_val = 1; /* XXX */
|
||
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
|
||
break;
|
||
|
||
case DT_MIPS_FLAGS:
|
||
dyn.d_un.d_val = RHF_NOTPOT; /* XXX */
|
||
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
|
||
break;
|
||
|
||
case DT_MIPS_CONFLICTNO:
|
||
name = ".conflict";
|
||
elemsize = sizeof (Elf32_Conflict);
|
||
goto set_elemno;
|
||
|
||
case DT_MIPS_LIBLISTNO:
|
||
name = ".liblist";
|
||
elemsize = sizeof (Elf32_Lib);
|
||
set_elemno:
|
||
s = bfd_get_section_by_name (output_bfd, name);
|
||
if (s != NULL)
|
||
{
|
||
if (s->_cooked_size != 0)
|
||
dyn.d_un.d_val = s->_cooked_size / elemsize;
|
||
else
|
||
dyn.d_un.d_val = s->_raw_size / elemsize;
|
||
}
|
||
else
|
||
dyn.d_un.d_val = 0;
|
||
|
||
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
|
||
break;
|
||
|
||
case DT_MIPS_TIME_STAMP:
|
||
time ((time_t *) &dyn.d_un.d_val);
|
||
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
|
||
break;
|
||
|
||
case DT_MIPS_ICHECKSUM:
|
||
/* XXX FIXME: */
|
||
break;
|
||
|
||
case DT_MIPS_IVERSION:
|
||
/* XXX FIXME: */
|
||
break;
|
||
|
||
case DT_MIPS_BASE_ADDRESS:
|
||
s = output_bfd->sections;
|
||
BFD_ASSERT (s != NULL);
|
||
dyn.d_un.d_ptr = s->vma & ~(0xffff);
|
||
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
|
||
break;
|
||
|
||
case DT_MIPS_LOCAL_GOTNO:
|
||
dyn.d_un.d_val = g->local_gotno;
|
||
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
|
||
break;
|
||
|
||
case DT_MIPS_SYMTABNO:
|
||
name = ".dynsym";
|
||
elemsize = sizeof (Elf32_External_Sym);
|
||
s = bfd_get_section_by_name (output_bfd, name);
|
||
BFD_ASSERT (s != NULL);
|
||
|
||
if (s->_cooked_size != 0)
|
||
dyn.d_un.d_val = s->_cooked_size / elemsize;
|
||
else
|
||
dyn.d_un.d_val = s->_raw_size / elemsize;
|
||
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
|
||
break;
|
||
|
||
case DT_MIPS_UNREFEXTNO:
|
||
/* XXX FIXME: */
|
||
dyn.d_un.d_val = SIZEOF_MIPS_DYNSYM_SECNAMES;
|
||
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
|
||
break;
|
||
|
||
case DT_MIPS_GOTSYM:
|
||
dyn.d_un.d_val = g->global_gotsym;
|
||
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
|
||
break;
|
||
|
||
case DT_MIPS_HIPAGENO:
|
||
dyn.d_un.d_val = g->local_gotno - MIPS_RESERVED_GOTNO;
|
||
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
|
||
break;
|
||
|
||
case DT_MIPS_RLD_MAP:
|
||
dyn.d_un.d_ptr = mips_elf_hash_table (info)->rld_value;
|
||
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
|
||
break;
|
||
|
||
}
|
||
}
|
||
}
|
||
|
||
/* The first entry of the global offset table will be filled at
|
||
runtime. The second entry will be used by some runtime loaders.
|
||
This isn't the case of Irix rld. */
|
||
if (sgot != NULL && sgot->_raw_size > 0)
|
||
{
|
||
bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
|
||
bfd_put_32 (output_bfd, (bfd_vma) 0x80000000, sgot->contents + 4);
|
||
}
|
||
|
||
if (sgot != NULL)
|
||
elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
|
||
|
||
{
|
||
asection *sdynsym;
|
||
asection *s;
|
||
unsigned int i;
|
||
bfd_vma last;
|
||
Elf_Internal_Sym sym;
|
||
long dindx;
|
||
const char *name;
|
||
const char * const * namep = mips_elf_dynsym_sec_names;
|
||
Elf32_compact_rel cpt;
|
||
|
||
/* Set up the section symbols for the output sections. SGI sets
|
||
the STT_NOTYPE attribute for these symbols. Should we do so? */
|
||
|
||
sdynsym = bfd_get_section_by_name (dynobj, ".dynsym");
|
||
if (sdynsym != NULL)
|
||
{
|
||
if (SGI_COMPAT (output_bfd))
|
||
{
|
||
sym.st_size = 0;
|
||
sym.st_name = 0;
|
||
sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_NOTYPE);
|
||
sym.st_other = 0;
|
||
|
||
i = 0;
|
||
while ((name = *namep++) != NULL)
|
||
{
|
||
s = bfd_get_section_by_name (output_bfd, name);
|
||
if (s != NULL)
|
||
{
|
||
sym.st_value = s->vma;
|
||
dindx = elf_section_data (s)->dynindx;
|
||
last = s->vma + s->_raw_size;
|
||
}
|
||
else
|
||
{
|
||
sym.st_value = last;
|
||
dindx++;
|
||
}
|
||
|
||
sym.st_shndx = (i < MIPS_TEXT_DYNSYM_SECNO
|
||
? SHN_MIPS_TEXT
|
||
: SHN_MIPS_DATA);
|
||
++i;
|
||
sym.st_name =
|
||
mips_elf_hash_table (info)->dynsym_sec_strindex[dindx];
|
||
|
||
bfd_elf32_swap_symbol_out (output_bfd, &sym,
|
||
(((Elf32_External_Sym *)
|
||
sdynsym->contents)
|
||
+ dindx));
|
||
}
|
||
|
||
/* Set the sh_info field of the output .dynsym section to
|
||
the index of the first global symbol. */
|
||
elf_section_data (sdynsym->output_section)->this_hdr.sh_info =
|
||
SIZEOF_MIPS_DYNSYM_SECNAMES;
|
||
}
|
||
else
|
||
{
|
||
sym.st_size = 0;
|
||
sym.st_name = 0;
|
||
sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
|
||
sym.st_other = 0;
|
||
|
||
for (s = output_bfd->sections; s != NULL; s = s->next)
|
||
{
|
||
int indx;
|
||
|
||
sym.st_value = s->vma;
|
||
|
||
indx = elf_section_data (s)->this_idx;
|
||
BFD_ASSERT (indx > 0);
|
||
sym.st_shndx = indx;
|
||
|
||
bfd_elf32_swap_symbol_out (output_bfd, &sym,
|
||
(((Elf32_External_Sym *)
|
||
sdynsym->contents)
|
||
+ elf_section_data (s)->dynindx));
|
||
}
|
||
|
||
/* Set the sh_info field of the output .dynsym section to
|
||
the index of the first global symbol. */
|
||
elf_section_data (sdynsym->output_section)->this_hdr.sh_info =
|
||
bfd_count_sections (output_bfd) + 1;
|
||
}
|
||
}
|
||
|
||
if (SGI_COMPAT (output_bfd))
|
||
{
|
||
/* Write .compact_rel section out. */
|
||
s = bfd_get_section_by_name (dynobj, ".compact_rel");
|
||
if (s != NULL)
|
||
{
|
||
cpt.id1 = 1;
|
||
cpt.num = s->reloc_count;
|
||
cpt.id2 = 2;
|
||
cpt.offset = (s->output_section->filepos
|
||
+ sizeof (Elf32_External_compact_rel));
|
||
cpt.reserved0 = 0;
|
||
cpt.reserved1 = 0;
|
||
bfd_elf32_swap_compact_rel_out (output_bfd, &cpt,
|
||
((Elf32_External_compact_rel *)
|
||
s->contents));
|
||
|
||
/* Clean up a dummy stub function entry in .text. */
|
||
s = bfd_get_section_by_name (dynobj, ".stub");
|
||
if (s != NULL)
|
||
{
|
||
file_ptr dummy_offset;
|
||
|
||
BFD_ASSERT (s->_raw_size >= MIPS_FUNCTION_STUB_SIZE);
|
||
dummy_offset = s->_raw_size - MIPS_FUNCTION_STUB_SIZE;
|
||
memset (s->contents + dummy_offset, 0,
|
||
MIPS_FUNCTION_STUB_SIZE);
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Clean up a first relocation in .rel.dyn. */
|
||
s = bfd_get_section_by_name (dynobj, ".rel.dyn");
|
||
if (s != NULL && s->_raw_size > 0)
|
||
memset (s->contents, 0, sizeof (Elf32_External_Rel));
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* This is almost identical to bfd_generic_get_... except that some
|
||
MIPS relocations need to be handled specially. Sigh. */
|
||
|
||
static bfd_byte *
|
||
elf32_mips_get_relocated_section_contents (abfd, link_info, link_order, data,
|
||
relocateable, symbols)
|
||
bfd *abfd;
|
||
struct bfd_link_info *link_info;
|
||
struct bfd_link_order *link_order;
|
||
bfd_byte *data;
|
||
boolean relocateable;
|
||
asymbol **symbols;
|
||
{
|
||
/* Get enough memory to hold the stuff */
|
||
bfd *input_bfd = link_order->u.indirect.section->owner;
|
||
asection *input_section = link_order->u.indirect.section;
|
||
|
||
long reloc_size = bfd_get_reloc_upper_bound (input_bfd, input_section);
|
||
arelent **reloc_vector = NULL;
|
||
long reloc_count;
|
||
|
||
if (reloc_size < 0)
|
||
goto error_return;
|
||
|
||
reloc_vector = (arelent **) bfd_malloc (reloc_size);
|
||
if (reloc_vector == NULL && reloc_size != 0)
|
||
goto error_return;
|
||
|
||
/* read in the section */
|
||
if (!bfd_get_section_contents (input_bfd,
|
||
input_section,
|
||
(PTR) data,
|
||
0,
|
||
input_section->_raw_size))
|
||
goto error_return;
|
||
|
||
/* We're not relaxing the section, so just copy the size info */
|
||
input_section->_cooked_size = input_section->_raw_size;
|
||
input_section->reloc_done = true;
|
||
|
||
reloc_count = bfd_canonicalize_reloc (input_bfd,
|
||
input_section,
|
||
reloc_vector,
|
||
symbols);
|
||
if (reloc_count < 0)
|
||
goto error_return;
|
||
|
||
if (reloc_count > 0)
|
||
{
|
||
arelent **parent;
|
||
/* for mips */
|
||
int gp_found;
|
||
bfd_vma gp = 0x12345678; /* initialize just to shut gcc up */
|
||
|
||
{
|
||
struct bfd_hash_entry *h;
|
||
struct bfd_link_hash_entry *lh;
|
||
/* Skip all this stuff if we aren't mixing formats. */
|
||
if (abfd && input_bfd
|
||
&& abfd->xvec == input_bfd->xvec)
|
||
lh = 0;
|
||
else
|
||
{
|
||
h = bfd_hash_lookup (&link_info->hash->table, "_gp", false, false);
|
||
lh = (struct bfd_link_hash_entry *) h;
|
||
}
|
||
lookup:
|
||
if (lh)
|
||
{
|
||
switch (lh->type)
|
||
{
|
||
case bfd_link_hash_undefined:
|
||
case bfd_link_hash_undefweak:
|
||
case bfd_link_hash_common:
|
||
gp_found = 0;
|
||
break;
|
||
case bfd_link_hash_defined:
|
||
case bfd_link_hash_defweak:
|
||
gp_found = 1;
|
||
gp = lh->u.def.value;
|
||
break;
|
||
case bfd_link_hash_indirect:
|
||
case bfd_link_hash_warning:
|
||
lh = lh->u.i.link;
|
||
/* @@FIXME ignoring warning for now */
|
||
goto lookup;
|
||
case bfd_link_hash_new:
|
||
default:
|
||
abort ();
|
||
}
|
||
}
|
||
else
|
||
gp_found = 0;
|
||
}
|
||
/* end mips */
|
||
for (parent = reloc_vector; *parent != (arelent *) NULL;
|
||
parent++)
|
||
{
|
||
char *error_message = (char *) NULL;
|
||
bfd_reloc_status_type r;
|
||
|
||
/* Specific to MIPS: Deal with relocation types that require
|
||
knowing the gp of the output bfd. */
|
||
asymbol *sym = *(*parent)->sym_ptr_ptr;
|
||
if (bfd_is_abs_section (sym->section) && abfd)
|
||
{
|
||
/* The special_function wouldn't get called anyways. */
|
||
}
|
||
else if (!gp_found)
|
||
{
|
||
/* The gp isn't there; let the special function code
|
||
fall over on its own. */
|
||
}
|
||
else if ((*parent)->howto->special_function
|
||
== _bfd_mips_elf_gprel16_reloc)
|
||
{
|
||
/* bypass special_function call */
|
||
r = gprel16_with_gp (input_bfd, sym, *parent, input_section,
|
||
relocateable, (PTR) data, gp);
|
||
goto skip_bfd_perform_relocation;
|
||
}
|
||
/* end mips specific stuff */
|
||
|
||
r = bfd_perform_relocation (input_bfd,
|
||
*parent,
|
||
(PTR) data,
|
||
input_section,
|
||
relocateable ? abfd : (bfd *) NULL,
|
||
&error_message);
|
||
skip_bfd_perform_relocation:
|
||
|
||
if (relocateable)
|
||
{
|
||
asection *os = input_section->output_section;
|
||
|
||
/* A partial link, so keep the relocs */
|
||
os->orelocation[os->reloc_count] = *parent;
|
||
os->reloc_count++;
|
||
}
|
||
|
||
if (r != bfd_reloc_ok)
|
||
{
|
||
switch (r)
|
||
{
|
||
case bfd_reloc_undefined:
|
||
if (!((*link_info->callbacks->undefined_symbol)
|
||
(link_info, bfd_asymbol_name (*(*parent)->sym_ptr_ptr),
|
||
input_bfd, input_section, (*parent)->address)))
|
||
goto error_return;
|
||
break;
|
||
case bfd_reloc_dangerous:
|
||
BFD_ASSERT (error_message != (char *) NULL);
|
||
if (!((*link_info->callbacks->reloc_dangerous)
|
||
(link_info, error_message, input_bfd, input_section,
|
||
(*parent)->address)))
|
||
goto error_return;
|
||
break;
|
||
case bfd_reloc_overflow:
|
||
if (!((*link_info->callbacks->reloc_overflow)
|
||
(link_info, bfd_asymbol_name (*(*parent)->sym_ptr_ptr),
|
||
(*parent)->howto->name, (*parent)->addend,
|
||
input_bfd, input_section, (*parent)->address)))
|
||
goto error_return;
|
||
break;
|
||
case bfd_reloc_outofrange:
|
||
default:
|
||
abort ();
|
||
break;
|
||
}
|
||
|
||
}
|
||
}
|
||
}
|
||
if (reloc_vector != NULL)
|
||
free (reloc_vector);
|
||
return data;
|
||
|
||
error_return:
|
||
if (reloc_vector != NULL)
|
||
free (reloc_vector);
|
||
return NULL;
|
||
}
|
||
#define bfd_elf32_bfd_get_relocated_section_contents \
|
||
elf32_mips_get_relocated_section_contents
|
||
|
||
/* ECOFF swapping routines. These are used when dealing with the
|
||
.mdebug section, which is in the ECOFF debugging format. */
|
||
static const struct ecoff_debug_swap mips_elf32_ecoff_debug_swap =
|
||
{
|
||
/* Symbol table magic number. */
|
||
magicSym,
|
||
/* Alignment of debugging information. E.g., 4. */
|
||
4,
|
||
/* Sizes of external symbolic information. */
|
||
sizeof (struct hdr_ext),
|
||
sizeof (struct dnr_ext),
|
||
sizeof (struct pdr_ext),
|
||
sizeof (struct sym_ext),
|
||
sizeof (struct opt_ext),
|
||
sizeof (struct fdr_ext),
|
||
sizeof (struct rfd_ext),
|
||
sizeof (struct ext_ext),
|
||
/* Functions to swap in external symbolic data. */
|
||
ecoff_swap_hdr_in,
|
||
ecoff_swap_dnr_in,
|
||
ecoff_swap_pdr_in,
|
||
ecoff_swap_sym_in,
|
||
ecoff_swap_opt_in,
|
||
ecoff_swap_fdr_in,
|
||
ecoff_swap_rfd_in,
|
||
ecoff_swap_ext_in,
|
||
_bfd_ecoff_swap_tir_in,
|
||
_bfd_ecoff_swap_rndx_in,
|
||
/* Functions to swap out external symbolic data. */
|
||
ecoff_swap_hdr_out,
|
||
ecoff_swap_dnr_out,
|
||
ecoff_swap_pdr_out,
|
||
ecoff_swap_sym_out,
|
||
ecoff_swap_opt_out,
|
||
ecoff_swap_fdr_out,
|
||
ecoff_swap_rfd_out,
|
||
ecoff_swap_ext_out,
|
||
_bfd_ecoff_swap_tir_out,
|
||
_bfd_ecoff_swap_rndx_out,
|
||
/* Function to read in symbolic data. */
|
||
_bfd_mips_elf_read_ecoff_info
|
||
};
|
||
|
||
#define TARGET_LITTLE_SYM bfd_elf32_littlemips_vec
|
||
#define TARGET_LITTLE_NAME "elf32-littlemips"
|
||
#define TARGET_BIG_SYM bfd_elf32_bigmips_vec
|
||
#define TARGET_BIG_NAME "elf32-bigmips"
|
||
#define ELF_ARCH bfd_arch_mips
|
||
#define ELF_MACHINE_CODE EM_MIPS
|
||
|
||
/* The SVR4 MIPS ABI says that this should be 0x10000, but Irix 5 uses
|
||
a value of 0x1000, and we are compatible. */
|
||
#define ELF_MAXPAGESIZE 0x1000
|
||
|
||
#define elf_backend_collect true
|
||
#define elf_backend_type_change_ok true
|
||
#define elf_info_to_howto 0
|
||
#define elf_info_to_howto_rel mips_info_to_howto_rel
|
||
#define elf_backend_sym_is_global mips_elf_sym_is_global
|
||
#define elf_backend_object_p mips_elf32_object_p
|
||
#define elf_backend_section_from_shdr mips_elf32_section_from_shdr
|
||
#define elf_backend_fake_sections _bfd_mips_elf_fake_sections
|
||
#define elf_backend_section_from_bfd_section \
|
||
_bfd_mips_elf_section_from_bfd_section
|
||
#define elf_backend_section_processing mips_elf32_section_processing
|
||
#define elf_backend_symbol_processing _bfd_mips_elf_symbol_processing
|
||
#define elf_backend_additional_program_headers \
|
||
mips_elf_additional_program_headers
|
||
#define elf_backend_modify_segment_map mips_elf_modify_segment_map
|
||
#define elf_backend_final_write_processing \
|
||
_bfd_mips_elf_final_write_processing
|
||
#define elf_backend_ecoff_debug_swap &mips_elf32_ecoff_debug_swap
|
||
|
||
#define bfd_elf32_bfd_is_local_label mips_elf_is_local_label
|
||
#define bfd_elf32_find_nearest_line _bfd_mips_elf_find_nearest_line
|
||
#define bfd_elf32_set_section_contents _bfd_mips_elf_set_section_contents
|
||
#define bfd_elf32_bfd_link_hash_table_create \
|
||
mips_elf_link_hash_table_create
|
||
#define bfd_elf32_bfd_final_link mips_elf_final_link
|
||
#define bfd_elf32_bfd_copy_private_bfd_data \
|
||
_bfd_mips_elf_copy_private_bfd_data
|
||
#define bfd_elf32_bfd_merge_private_bfd_data \
|
||
_bfd_mips_elf_merge_private_bfd_data
|
||
#define bfd_elf32_bfd_set_private_flags _bfd_mips_elf_set_private_flags
|
||
#define elf_backend_add_symbol_hook mips_elf_add_symbol_hook
|
||
#define elf_backend_create_dynamic_sections \
|
||
mips_elf_create_dynamic_sections
|
||
#define elf_backend_check_relocs mips_elf_check_relocs
|
||
#define elf_backend_adjust_dynamic_symbol \
|
||
mips_elf_adjust_dynamic_symbol
|
||
#define elf_backend_size_dynamic_sections \
|
||
mips_elf_size_dynamic_sections
|
||
#define elf_backend_relocate_section mips_elf_relocate_section
|
||
#define elf_backend_finish_dynamic_symbol \
|
||
mips_elf_finish_dynamic_symbol
|
||
#define elf_backend_finish_dynamic_sections \
|
||
mips_elf_finish_dynamic_sections
|
||
|
||
#include "elf32-target.h"
|