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b6eb341bf8
* elf32-ppc.c (ppc_elf_relocate_section): Don't emit R_PPC_REL* relocs in shared libraries which refer to local symbols. Cope with addend when processing a GOT relocation. * elf32-ppc.c (ppc_elf_size_dynamic_sections): Only create symbols for sections that the linker didn't create. (ppc_elf_finish_dynamic_sections): Only try to write out a section symbol if it was created in ppc_elf_size_dynamic_sections. (ppc_elf_relocate_section): Complain if we have to generate a reloc relative to a section for which we didn't output a symbol. * elf32-ppc.c (ppc_elf_size_dynamic_sections): Clean up. PLT relocs are 'rela' relocs, like everything else. .rela.plt is not a read-only section, so we don't have to special-case it. * elf32-ppc.c (ppc_elf_adjust_dynamic_symbol): Entries in the .rela.bss section are (of course) 'rela' relocs not 'rel' relocs. * elf32-ppc.c (ppc_elf_check_relocs): Initialise srelgot. (ppc_elf_relocate_section): @got offsets are 4 from start of the actual .got section. * elflink.c (_bfd_elf_create_got_section): The three reserved words start from the symbol '_GLOBAL_OFFSET_TABLE_'. * elf32-ppc.c (ppc_elf_size_dynamic_sections): '.rela' is 5 characters, not 4. * elf32-ppc.c (ppc_elf_check_relocs): Use _bfd_elf_create_got_section to create the GOT rather than ppc_elf_create_linker_section. Create the '.rela.got' section ourselves. (ppc_elf_finish_dynamic_symbol): Set up GOT relocations when a symbol has a GOT entry. (ppc_elf_relocate_section): Record when a symbol is used through the GOT, and allocate space in the GOT for each such symbol. (ppc_elf_adjust_dynamic_symbol): Delete unused .got.plt stuff. (ppc_elf_create_linker_section): Delete unused LINKER_SECTION_GOT stuff. * elf32-ppc.c (ppc_elf_howto_raw): GOT16_HA relocs should be treated in a similar way to ADDR16_HA relocs. (ppc_elf_relocate_section): PLTREL24 relocs do not get copied into shared objects; the linker must deal with them. (ppc_elf_create_linker_section): Stop setting _GLOBAL_OFFSET_TABLE_ to the wrong value; delete unused LINKER_SECTION_PLT stuff. (ppc_elf_check_relocs): Delete unused LINKER_SECTION_PLT stuff. (ppc_elf_finish_dynamic_sections): Use BFD calls to get GOT section, not ELF-specific calls. (elf_backend_plt_not_loaded): Set to 1. (elf_backend_got_symbol_offset): Set to 4. * elf-bfd.h (elf_backend_data): Add 'plt_not_loaded' member for when ld.so fills in the PLT; and 'got_symbol_offset' member. * elflink.c (_bfd_elf_create_dynamic_sections): Apply plt_not_loaded member. (_bfd_elf_create_got_section): Apply got_symbol_offset. * elfxx-target.h (elf_backend_plt_not_loaded): Set default to 'loaded'. (elf_backend_G_O_T_offset): Set default to 0. (elfNN_bed): Set added fields. * elf32-ppc.c (ppc_elf_size_dynamic_sections): Was setting DT_RELENT in shared objects; should be DT_RELAENT. * elf32-ppc.c (ppc_elf_relocate_section): Propagate R_PPC_ADDR16_HA relocs to shared objects. Cope with case where such a reloc (in a non-shared object) refers to a symbol that's not defined.
3316 lines
99 KiB
C
3316 lines
99 KiB
C
/* PowerPC-specific support for 32-bit ELF
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Copyright 1994, 1995, 1996, 1997 Free Software Foundation, Inc.
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Written by Ian Lance Taylor, Cygnus Support.
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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 is based on a preliminary PowerPC ELF ABI. The
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information may not match the final PowerPC ELF ABI. It includes
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suggestions from the in-progress Embedded PowerPC ABI, and that
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information may also not match. */
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#include "bfd.h"
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#include "sysdep.h"
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#include "bfdlink.h"
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#include "libbfd.h"
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#include "elf-bfd.h"
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#include "elf/ppc.h"
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#define USE_RELA /* we want RELA relocations, not REL */
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/* PowerPC relocations defined by the ABIs */
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enum ppc_reloc_type
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{
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R_PPC_NONE = 0,
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R_PPC_ADDR32 = 1,
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R_PPC_ADDR24 = 2,
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R_PPC_ADDR16 = 3,
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R_PPC_ADDR16_LO = 4,
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R_PPC_ADDR16_HI = 5,
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R_PPC_ADDR16_HA = 6,
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R_PPC_ADDR14 = 7,
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R_PPC_ADDR14_BRTAKEN = 8,
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R_PPC_ADDR14_BRNTAKEN = 9,
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R_PPC_REL24 = 10,
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R_PPC_REL14 = 11,
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R_PPC_REL14_BRTAKEN = 12,
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R_PPC_REL14_BRNTAKEN = 13,
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R_PPC_GOT16 = 14,
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R_PPC_GOT16_LO = 15,
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R_PPC_GOT16_HI = 16,
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R_PPC_GOT16_HA = 17,
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R_PPC_PLTREL24 = 18,
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R_PPC_COPY = 19,
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R_PPC_GLOB_DAT = 20,
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R_PPC_JMP_SLOT = 21,
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R_PPC_RELATIVE = 22,
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R_PPC_LOCAL24PC = 23,
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R_PPC_UADDR32 = 24,
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R_PPC_UADDR16 = 25,
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R_PPC_REL32 = 26,
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R_PPC_PLT32 = 27,
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R_PPC_PLTREL32 = 28,
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R_PPC_PLT16_LO = 29,
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R_PPC_PLT16_HI = 30,
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R_PPC_PLT16_HA = 31,
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R_PPC_SDAREL16 = 32,
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R_PPC_SECTOFF = 33,
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R_PPC_SECTOFF_LO = 34,
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R_PPC_SECTOFF_HI = 35,
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R_PPC_SECTOFF_HA = 36,
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/* The remaining relocs are from the Embedded ELF ABI, and are not
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in the SVR4 ELF ABI. */
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R_PPC_EMB_NADDR32 = 101,
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R_PPC_EMB_NADDR16 = 102,
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R_PPC_EMB_NADDR16_LO = 103,
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R_PPC_EMB_NADDR16_HI = 104,
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R_PPC_EMB_NADDR16_HA = 105,
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R_PPC_EMB_SDAI16 = 106,
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R_PPC_EMB_SDA2I16 = 107,
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R_PPC_EMB_SDA2REL = 108,
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R_PPC_EMB_SDA21 = 109,
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R_PPC_EMB_MRKREF = 110,
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R_PPC_EMB_RELSEC16 = 111,
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R_PPC_EMB_RELST_LO = 112,
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R_PPC_EMB_RELST_HI = 113,
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R_PPC_EMB_RELST_HA = 114,
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R_PPC_EMB_BIT_FLD = 115,
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R_PPC_EMB_RELSDA = 116,
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/* This is a phony reloc to handle any old fashioned TOC16 references
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that may still be in object files. */
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R_PPC_TOC16 = 255,
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R_PPC_max
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};
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static reloc_howto_type *ppc_elf_reloc_type_lookup
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PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
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static void ppc_elf_info_to_howto
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PARAMS ((bfd *abfd, arelent *cache_ptr, Elf32_Internal_Rela *dst));
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static void ppc_elf_howto_init PARAMS ((void));
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static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
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PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
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static boolean ppc_elf_set_private_flags PARAMS ((bfd *, flagword));
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static boolean ppc_elf_copy_private_bfd_data PARAMS ((bfd *, bfd *));
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static boolean ppc_elf_merge_private_bfd_data PARAMS ((bfd *, bfd *));
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static int ppc_elf_additional_program_headers PARAMS ((bfd *));
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static boolean ppc_elf_modify_segment_map PARAMS ((bfd *));
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static boolean ppc_elf_section_from_shdr PARAMS ((bfd *,
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Elf32_Internal_Shdr *,
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char *));
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static boolean ppc_elf_fake_sections
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PARAMS ((bfd *, Elf32_Internal_Shdr *, asection *));
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static elf_linker_section_t *ppc_elf_create_linker_section
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PARAMS ((bfd *abfd,
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struct bfd_link_info *info,
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enum elf_linker_section_enum));
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static boolean ppc_elf_check_relocs PARAMS ((bfd *,
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struct bfd_link_info *,
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asection *,
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const Elf_Internal_Rela *));
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static boolean ppc_elf_adjust_dynamic_symbol PARAMS ((struct bfd_link_info *,
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struct elf_link_hash_entry *));
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static boolean ppc_elf_adjust_dynindx PARAMS ((struct elf_link_hash_entry *, PTR));
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static boolean ppc_elf_size_dynamic_sections PARAMS ((bfd *, struct bfd_link_info *));
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static boolean ppc_elf_relocate_section PARAMS ((bfd *,
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struct bfd_link_info *info,
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bfd *,
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asection *,
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bfd_byte *,
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Elf_Internal_Rela *relocs,
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Elf_Internal_Sym *local_syms,
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asection **));
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static boolean ppc_elf_add_symbol_hook PARAMS ((bfd *,
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struct bfd_link_info *,
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const Elf_Internal_Sym *,
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const char **,
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flagword *,
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asection **,
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bfd_vma *));
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static boolean ppc_elf_finish_dynamic_symbol PARAMS ((bfd *,
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struct bfd_link_info *,
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struct elf_link_hash_entry *,
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Elf_Internal_Sym *));
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static boolean ppc_elf_finish_dynamic_sections PARAMS ((bfd *, struct bfd_link_info *));
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#define BRANCH_PREDICT_BIT 0x200000 /* branch prediction bit for branch taken relocs */
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#define RA_REGISTER_MASK 0x001f0000 /* mask to set RA in memory instructions */
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#define RA_REGISTER_SHIFT 16 /* value to shift register by to insert RA */
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/* The name of the dynamic interpreter. This is put in the .interp
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section. */
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#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
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/* The size in bytes of an entry in the procedure linkage table, and of the initial size
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of the plt reserved for the dynamic linker. */
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#define PLT_ENTRY_SIZE 12
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#define PLT_INITIAL_ENTRY_SIZE 72
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static reloc_howto_type *ppc_elf_howto_table[ (int)R_PPC_max ];
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static reloc_howto_type ppc_elf_howto_raw[] =
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{
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/* This reloc does nothing. */
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HOWTO (R_PPC_NONE, /* 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_PPC_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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/* A standard 32 bit relocation. */
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HOWTO (R_PPC_ADDR32, /* 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_PPC_ADDR32", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0xffffffff, /* dst_mask */
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false), /* pcrel_offset */
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/* An absolute 26 bit branch; the lower two bits must be zero.
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FIXME: we don't check that, we just clear them. */
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HOWTO (R_PPC_ADDR24, /* type */
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0, /* 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_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_PPC_ADDR24", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0x3fffffc, /* dst_mask */
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false), /* pcrel_offset */
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/* A standard 16 bit relocation. */
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HOWTO (R_PPC_ADDR16, /* 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_PPC_ADDR16", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0xffff, /* dst_mask */
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false), /* pcrel_offset */
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/* A 16 bit relocation without overflow. */
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HOWTO (R_PPC_ADDR16_LO, /* 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_dont,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_PPC_ADDR16_LO", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0xffff, /* dst_mask */
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false), /* pcrel_offset */
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/* The high order 16 bits of an address. */
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HOWTO (R_PPC_ADDR16_HI, /* type */
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16, /* 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_dont, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_PPC_ADDR16_HI", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0xffff, /* dst_mask */
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false), /* pcrel_offset */
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/* The high order 16 bits of an address, plus 1 if the contents of
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the low 16 bits, treated as a signed number, is negative. */
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HOWTO (R_PPC_ADDR16_HA, /* type */
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16, /* 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_dont, /* complain_on_overflow */
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ppc_elf_addr16_ha_reloc, /* special_function */
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"R_PPC_ADDR16_HA", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0xffff, /* dst_mask */
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false), /* pcrel_offset */
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/* An absolute 16 bit branch; the lower two bits must be zero.
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FIXME: we don't check that, we just clear them. */
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HOWTO (R_PPC_ADDR14, /* 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_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_PPC_ADDR14", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0xfffc, /* dst_mask */
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false), /* pcrel_offset */
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/* An absolute 16 bit branch, for which bit 10 should be set to
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indicate that the branch is expected to be taken. The lower two
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bits must be zero. */
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HOWTO (R_PPC_ADDR14_BRTAKEN, /* 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_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_PPC_ADDR14_BRTAKEN",/* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0xfffc, /* dst_mask */
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false), /* pcrel_offset */
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/* An absolute 16 bit branch, for which bit 10 should be set to
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indicate that the branch is not expected to be taken. The lower
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two bits must be zero. */
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HOWTO (R_PPC_ADDR14_BRNTAKEN, /* 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_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_PPC_ADDR14_BRNTAKEN",/* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0xfffc, /* dst_mask */
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false), /* pcrel_offset */
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/* A relative 26 bit branch; the lower two bits must be zero. */
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HOWTO (R_PPC_REL24, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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26, /* bitsize */
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true, /* pc_relative */
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0, /* bitpos */
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complain_overflow_signed, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_PPC_REL24", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0x3fffffc, /* dst_mask */
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true), /* pcrel_offset */
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/* A relative 16 bit branch; the lower two bits must be zero. */
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HOWTO (R_PPC_REL14, /* 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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||
true, /* pc_relative */
|
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0, /* bitpos */
|
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complain_overflow_signed, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_PPC_REL14", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xfffc, /* dst_mask */
|
||
true), /* pcrel_offset */
|
||
|
||
/* A relative 16 bit branch. Bit 10 should be set to indicate that
|
||
the branch is expected to be taken. The lower two bits must be
|
||
zero. */
|
||
HOWTO (R_PPC_REL14_BRTAKEN, /* 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_PPC_REL14_BRTAKEN", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xfffc, /* dst_mask */
|
||
true), /* pcrel_offset */
|
||
|
||
/* A relative 16 bit branch. Bit 10 should be set to indicate that
|
||
the branch is not expected to be taken. The lower two bits must
|
||
be zero. */
|
||
HOWTO (R_PPC_REL14_BRNTAKEN, /* 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_PPC_REL14_BRNTAKEN",/* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xfffc, /* dst_mask */
|
||
true), /* pcrel_offset */
|
||
|
||
/* Like R_PPC_ADDR16, but referring to the GOT table entry for the
|
||
symbol. */
|
||
HOWTO (R_PPC_GOT16, /* type */
|
||
0, /* rightshift */
|
||
1, /* 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_PPC_GOT16", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
|
||
the symbol. */
|
||
HOWTO (R_PPC_GOT16_LO, /* type */
|
||
0, /* rightshift */
|
||
1, /* 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_PPC_GOT16_LO", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
|
||
the symbol. */
|
||
HOWTO (R_PPC_GOT16_HI, /* type */
|
||
16, /* rightshift */
|
||
1, /* 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_PPC_GOT16_HI", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
|
||
the symbol. */
|
||
HOWTO (R_PPC_GOT16_HA, /* type */
|
||
16, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
ppc_elf_addr16_ha_reloc, /* special_function */
|
||
"R_PPC_GOT16_HA", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Like R_PPC_REL24, but referring to the procedure linkage table
|
||
entry for the symbol. FIXME: Not supported. */
|
||
HOWTO (R_PPC_PLTREL24, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
26, /* bitsize */
|
||
true, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_signed, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_PPC_PLTREL24", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0x3fffffc, /* dst_mask */
|
||
true), /* pcrel_offset */
|
||
|
||
/* This is used only by the dynamic linker. The symbol should exist
|
||
both in the object being run and in some shared library. The
|
||
dynamic linker copies the data addressed by the symbol from the
|
||
shared library into the object. I have no idea what the purpose
|
||
of this is. */
|
||
HOWTO (R_PPC_COPY, /* 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_elf_generic_reloc, /* special_function */
|
||
"R_PPC_COPY", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Like R_PPC_ADDR32, but used when setting global offset table
|
||
entries. */
|
||
HOWTO (R_PPC_GLOB_DAT, /* 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_elf_generic_reloc, /* special_function */
|
||
"R_PPC_GLOB_DAT", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffffffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Marks a procedure linkage table entry for a symbol. */
|
||
HOWTO (R_PPC_JMP_SLOT, /* 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_elf_generic_reloc, /* special_function */
|
||
"R_PPC_JMP_SLOT", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Used only by the dynamic linker. When the object is run, this
|
||
longword is set to the load address of the object, plus the
|
||
addend. */
|
||
HOWTO (R_PPC_RELATIVE, /* 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_elf_generic_reloc, /* special_function */
|
||
"R_PPC_RELATIVE", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffffffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Like R_PPC_REL24, but uses the value of the symbol within the
|
||
object rather than the final value. Normally used for
|
||
_GLOBAL_OFFSET_TABLE_. FIXME: Not supported. */
|
||
HOWTO (R_PPC_LOCAL24PC, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
26, /* bitsize */
|
||
true, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_signed, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_PPC_LOCAL24PC", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0x3fffffc, /* dst_mask */
|
||
true), /* pcrel_offset */
|
||
|
||
/* Like R_PPC_ADDR32, but may be unaligned. */
|
||
HOWTO (R_PPC_UADDR32, /* 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_elf_generic_reloc, /* special_function */
|
||
"R_PPC_UADDR32", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffffffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Like R_PPC_ADDR16, but may be unaligned. */
|
||
HOWTO (R_PPC_UADDR16, /* type */
|
||
0, /* rightshift */
|
||
1, /* 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_PPC_UADDR16", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* 32-bit PC relative */
|
||
HOWTO (R_PPC_REL32, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
32, /* bitsize */
|
||
true, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_PPC_REL32", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffffffff, /* dst_mask */
|
||
true), /* pcrel_offset */
|
||
|
||
/* 32-bit relocation to the symbol's procedure linkage table.
|
||
FIXEME: not supported. */
|
||
HOWTO (R_PPC_PLT32, /* 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_elf_generic_reloc, /* special_function */
|
||
"R_PPC_PLT32", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* 32-bit PC relative relocation to the symbol's procedure linkage table.
|
||
FIXEME: not supported. */
|
||
HOWTO (R_PPC_PLTREL32, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
32, /* bitsize */
|
||
true, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_PPC_PLTREL32", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0, /* dst_mask */
|
||
true), /* pcrel_offset */
|
||
|
||
/* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
|
||
the symbol. */
|
||
HOWTO (R_PPC_PLT16_LO, /* type */
|
||
0, /* rightshift */
|
||
1, /* 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_PPC_PLT16_LO", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
|
||
the symbol. */
|
||
HOWTO (R_PPC_PLT16_HI, /* type */
|
||
16, /* rightshift */
|
||
1, /* 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_PPC_PLT16_HI", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
|
||
the symbol. FIXME: Not supported. */
|
||
HOWTO (R_PPC_PLT16_HA, /* type */
|
||
0, /* rightshift */
|
||
1, /* 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_PPC_PLT16_HA", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
|
||
small data items. */
|
||
HOWTO (R_PPC_SDAREL16, /* type */
|
||
0, /* rightshift */
|
||
1, /* 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_PPC_SDAREL16", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* 32-bit section relative relocation. */
|
||
HOWTO (R_PPC_SECTOFF, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
32, /* bitsize */
|
||
true, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_PPC_SECTOFF", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0, /* dst_mask */
|
||
true), /* pcrel_offset */
|
||
|
||
/* 16-bit lower half section relative relocation. */
|
||
HOWTO (R_PPC_SECTOFF_LO, /* type */
|
||
0, /* rightshift */
|
||
1, /* 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_PPC_SECTOFF_LO", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* 16-bit upper half section relative relocation. */
|
||
HOWTO (R_PPC_SECTOFF_HI, /* type */
|
||
16, /* rightshift */
|
||
1, /* 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_PPC_SECTOFF_HI", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* 16-bit upper half adjusted section relative relocation. */
|
||
HOWTO (R_PPC_SECTOFF_HA, /* type */
|
||
0, /* rightshift */
|
||
1, /* 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_PPC_SECTOFF_HA", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* The remaining relocs are from the Embedded ELF ABI, and are not
|
||
in the SVR4 ELF ABI. */
|
||
|
||
/* 32 bit value resulting from the addend minus the symbol */
|
||
HOWTO (R_PPC_EMB_NADDR32, /* 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_elf_generic_reloc, /* special_function */
|
||
"R_PPC_EMB_NADDR32", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffffffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* 16 bit value resulting from the addend minus the symbol */
|
||
HOWTO (R_PPC_EMB_NADDR16, /* type */
|
||
0, /* rightshift */
|
||
1, /* 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_PPC_EMB_NADDR16", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* 16 bit value resulting from the addend minus the symbol */
|
||
HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
|
||
0, /* rightshift */
|
||
1, /* 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_PPC_EMB_ADDR16_LO", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* The high order 16 bits of the addend minus the symbol */
|
||
HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
|
||
16, /* rightshift */
|
||
1, /* 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_PPC_EMB_NADDR16_HI", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* The high order 16 bits of the result of the addend minus the address,
|
||
plus 1 if the contents of the low 16 bits, treated as a signed number,
|
||
is negative. */
|
||
HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
|
||
16, /* rightshift */
|
||
1, /* 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_PPC_EMB_NADDR16_HA", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* 16 bit value resulting from allocating a 4 byte word to hold an
|
||
address in the .sdata section, and returning the offset from
|
||
_SDA_BASE_ for that relocation */
|
||
HOWTO (R_PPC_EMB_SDAI16, /* type */
|
||
0, /* rightshift */
|
||
1, /* 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_PPC_EMB_SDAI16", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* 16 bit value resulting from allocating a 4 byte word to hold an
|
||
address in the .sdata2 section, and returning the offset from
|
||
_SDA2_BASE_ for that relocation */
|
||
HOWTO (R_PPC_EMB_SDA2I16, /* type */
|
||
0, /* rightshift */
|
||
1, /* 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_PPC_EMB_SDA2I16", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
|
||
small data items. */
|
||
HOWTO (R_PPC_EMB_SDA2REL, /* type */
|
||
0, /* rightshift */
|
||
1, /* 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_PPC_EMB_SDA2REL", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
|
||
signed offset from the appropriate base, and filling in the register
|
||
field with the appropriate register (0, 2, or 13). */
|
||
HOWTO (R_PPC_EMB_SDA21, /* 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_PPC_EMB_SDA21", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Relocation not handled: R_PPC_EMB_MRKREF */
|
||
/* Relocation not handled: R_PPC_EMB_RELSEC16 */
|
||
/* Relocation not handled: R_PPC_EMB_RELST_LO */
|
||
/* Relocation not handled: R_PPC_EMB_RELST_HI */
|
||
/* Relocation not handled: R_PPC_EMB_RELST_HA */
|
||
/* Relocation not handled: R_PPC_EMB_BIT_FLD */
|
||
|
||
/* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
|
||
in the 16 bit signed offset from the appropriate base, and filling in the
|
||
register field with the appropriate register (0, 2, or 13). */
|
||
HOWTO (R_PPC_EMB_RELSDA, /* type */
|
||
0, /* rightshift */
|
||
1, /* 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_PPC_EMB_RELSDA", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Phony reloc to handle AIX style TOC entries */
|
||
HOWTO (R_PPC_TOC16, /* type */
|
||
0, /* rightshift */
|
||
1, /* 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_PPC_TOC16", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
};
|
||
|
||
|
||
/* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
|
||
|
||
static void
|
||
ppc_elf_howto_init ()
|
||
{
|
||
unsigned int i, type;
|
||
|
||
for (i = 0; i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]); i++)
|
||
{
|
||
type = ppc_elf_howto_raw[i].type;
|
||
BFD_ASSERT (type < sizeof(ppc_elf_howto_table) / sizeof(ppc_elf_howto_table[0]));
|
||
ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
|
||
}
|
||
}
|
||
|
||
|
||
static reloc_howto_type *
|
||
ppc_elf_reloc_type_lookup (abfd, code)
|
||
bfd *abfd;
|
||
bfd_reloc_code_real_type code;
|
||
{
|
||
enum ppc_reloc_type ppc_reloc = R_PPC_NONE;
|
||
|
||
if (!ppc_elf_howto_table[ R_PPC_ADDR32 ]) /* Initialize howto table if needed */
|
||
ppc_elf_howto_init ();
|
||
|
||
switch ((int)code)
|
||
{
|
||
default:
|
||
return (reloc_howto_type *)NULL;
|
||
|
||
case BFD_RELOC_NONE: ppc_reloc = R_PPC_NONE; break;
|
||
case BFD_RELOC_32: ppc_reloc = R_PPC_ADDR32; break;
|
||
case BFD_RELOC_PPC_BA26: ppc_reloc = R_PPC_ADDR24; break;
|
||
case BFD_RELOC_16: ppc_reloc = R_PPC_ADDR16; break;
|
||
case BFD_RELOC_LO16: ppc_reloc = R_PPC_ADDR16_LO; break;
|
||
case BFD_RELOC_HI16: ppc_reloc = R_PPC_ADDR16_HI; break;
|
||
case BFD_RELOC_HI16_S: ppc_reloc = R_PPC_ADDR16_HA; break;
|
||
case BFD_RELOC_PPC_BA16: ppc_reloc = R_PPC_ADDR14; break;
|
||
case BFD_RELOC_PPC_BA16_BRTAKEN: ppc_reloc = R_PPC_ADDR14_BRTAKEN; break;
|
||
case BFD_RELOC_PPC_BA16_BRNTAKEN: ppc_reloc = R_PPC_ADDR14_BRNTAKEN; break;
|
||
case BFD_RELOC_PPC_B26: ppc_reloc = R_PPC_REL24; break;
|
||
case BFD_RELOC_PPC_B16: ppc_reloc = R_PPC_REL14; break;
|
||
case BFD_RELOC_PPC_B16_BRTAKEN: ppc_reloc = R_PPC_REL14_BRTAKEN; break;
|
||
case BFD_RELOC_PPC_B16_BRNTAKEN: ppc_reloc = R_PPC_REL14_BRNTAKEN; break;
|
||
case BFD_RELOC_16_GOTOFF: ppc_reloc = R_PPC_GOT16; break;
|
||
case BFD_RELOC_LO16_GOTOFF: ppc_reloc = R_PPC_GOT16_LO; break;
|
||
case BFD_RELOC_HI16_GOTOFF: ppc_reloc = R_PPC_GOT16_HI; break;
|
||
case BFD_RELOC_HI16_S_GOTOFF: ppc_reloc = R_PPC_GOT16_HA; break;
|
||
case BFD_RELOC_24_PLT_PCREL: ppc_reloc = R_PPC_PLTREL24; break;
|
||
case BFD_RELOC_PPC_COPY: ppc_reloc = R_PPC_COPY; break;
|
||
case BFD_RELOC_PPC_GLOB_DAT: ppc_reloc = R_PPC_GLOB_DAT; break;
|
||
case BFD_RELOC_PPC_LOCAL24PC: ppc_reloc = R_PPC_LOCAL24PC; break;
|
||
case BFD_RELOC_32_PCREL: ppc_reloc = R_PPC_REL32; break;
|
||
case BFD_RELOC_32_PLTOFF: ppc_reloc = R_PPC_PLT32; break;
|
||
case BFD_RELOC_32_PLT_PCREL: ppc_reloc = R_PPC_PLTREL32; break;
|
||
case BFD_RELOC_LO16_PLTOFF: ppc_reloc = R_PPC_PLT16_LO; break;
|
||
case BFD_RELOC_HI16_PLTOFF: ppc_reloc = R_PPC_PLT16_HI; break;
|
||
case BFD_RELOC_HI16_S_PLTOFF: ppc_reloc = R_PPC_PLT16_HA; break;
|
||
case BFD_RELOC_GPREL16: ppc_reloc = R_PPC_SDAREL16; break;
|
||
case BFD_RELOC_32_BASEREL: ppc_reloc = R_PPC_SECTOFF; break;
|
||
case BFD_RELOC_LO16_BASEREL: ppc_reloc = R_PPC_SECTOFF_LO; break;
|
||
case BFD_RELOC_HI16_BASEREL: ppc_reloc = R_PPC_SECTOFF_HI; break;
|
||
case BFD_RELOC_HI16_S_BASEREL: ppc_reloc = R_PPC_SECTOFF_HA; break;
|
||
case BFD_RELOC_CTOR: ppc_reloc = R_PPC_ADDR32; break;
|
||
case BFD_RELOC_PPC_TOC16: ppc_reloc = R_PPC_TOC16; break;
|
||
case BFD_RELOC_PPC_EMB_NADDR32: ppc_reloc = R_PPC_EMB_NADDR32; break;
|
||
case BFD_RELOC_PPC_EMB_NADDR16: ppc_reloc = R_PPC_EMB_NADDR16; break;
|
||
case BFD_RELOC_PPC_EMB_NADDR16_LO: ppc_reloc = R_PPC_EMB_NADDR16_LO; break;
|
||
case BFD_RELOC_PPC_EMB_NADDR16_HI: ppc_reloc = R_PPC_EMB_NADDR16_HI; break;
|
||
case BFD_RELOC_PPC_EMB_NADDR16_HA: ppc_reloc = R_PPC_EMB_NADDR16_HA; break;
|
||
case BFD_RELOC_PPC_EMB_SDAI16: ppc_reloc = R_PPC_EMB_SDAI16; break;
|
||
case BFD_RELOC_PPC_EMB_SDA2I16: ppc_reloc = R_PPC_EMB_SDA2I16; break;
|
||
case BFD_RELOC_PPC_EMB_SDA2REL: ppc_reloc = R_PPC_EMB_SDA2REL; break;
|
||
case BFD_RELOC_PPC_EMB_SDA21: ppc_reloc = R_PPC_EMB_SDA21; break;
|
||
case BFD_RELOC_PPC_EMB_MRKREF: ppc_reloc = R_PPC_EMB_MRKREF; break;
|
||
case BFD_RELOC_PPC_EMB_RELSEC16: ppc_reloc = R_PPC_EMB_RELSEC16; break;
|
||
case BFD_RELOC_PPC_EMB_RELST_LO: ppc_reloc = R_PPC_EMB_RELST_LO; break;
|
||
case BFD_RELOC_PPC_EMB_RELST_HI: ppc_reloc = R_PPC_EMB_RELST_HI; break;
|
||
case BFD_RELOC_PPC_EMB_RELST_HA: ppc_reloc = R_PPC_EMB_RELST_HA; break;
|
||
case BFD_RELOC_PPC_EMB_BIT_FLD: ppc_reloc = R_PPC_EMB_BIT_FLD; break;
|
||
case BFD_RELOC_PPC_EMB_RELSDA: ppc_reloc = R_PPC_EMB_RELSDA; break;
|
||
}
|
||
|
||
return ppc_elf_howto_table[ (int)ppc_reloc ];
|
||
};
|
||
|
||
/* Set the howto pointer for a PowerPC ELF reloc. */
|
||
|
||
static void
|
||
ppc_elf_info_to_howto (abfd, cache_ptr, dst)
|
||
bfd *abfd;
|
||
arelent *cache_ptr;
|
||
Elf32_Internal_Rela *dst;
|
||
{
|
||
if (!ppc_elf_howto_table[ R_PPC_ADDR32 ]) /* Initialize howto table if needed */
|
||
ppc_elf_howto_init ();
|
||
|
||
BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max);
|
||
cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
|
||
}
|
||
|
||
/* Handle the R_PPC_ADDR16_HA reloc. */
|
||
|
||
static bfd_reloc_status_type
|
||
ppc_elf_addr16_ha_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_vma relocation;
|
||
|
||
if (output_bfd != NULL)
|
||
{
|
||
reloc_entry->address += input_section->output_offset;
|
||
return bfd_reloc_ok;
|
||
}
|
||
|
||
if (reloc_entry->address > input_section->_cooked_size)
|
||
return bfd_reloc_outofrange;
|
||
|
||
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;
|
||
|
||
reloc_entry->addend += (relocation & 0x8000) << 1;
|
||
|
||
return bfd_reloc_continue;
|
||
}
|
||
|
||
/* Function to set whether a module needs the -mrelocatable bit set. */
|
||
|
||
static boolean
|
||
ppc_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 */
|
||
static boolean
|
||
ppc_elf_copy_private_bfd_data (ibfd, obfd)
|
||
bfd *ibfd;
|
||
bfd *obfd;
|
||
{
|
||
if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
|
||
|| 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_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 */
|
||
static boolean
|
||
ppc_elf_merge_private_bfd_data (ibfd, obfd)
|
||
bfd *ibfd;
|
||
bfd *obfd;
|
||
{
|
||
flagword old_flags;
|
||
flagword new_flags;
|
||
boolean error;
|
||
|
||
/* 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;
|
||
}
|
||
|
||
if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
|
||
|| bfd_get_flavour (obfd) != bfd_target_elf_flavour)
|
||
return true;
|
||
|
||
new_flags = elf_elfheader (ibfd)->e_flags;
|
||
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) /* Compatible flags are ok */
|
||
;
|
||
|
||
else /* Incompatible flags */
|
||
{
|
||
/* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib to be linked
|
||
with either. */
|
||
error = false;
|
||
if ((new_flags & EF_PPC_RELOCATABLE) != 0
|
||
&& (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
|
||
{
|
||
error = true;
|
||
(*_bfd_error_handler)
|
||
("%s: compiled with -mrelocatable and linked with modules compiled normally",
|
||
bfd_get_filename (ibfd));
|
||
}
|
||
else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
|
||
&& (old_flags & EF_PPC_RELOCATABLE) != 0)
|
||
{
|
||
error = true;
|
||
(*_bfd_error_handler)
|
||
("%s: compiled normally and linked with modules compiled with -mrelocatable",
|
||
bfd_get_filename (ibfd));
|
||
}
|
||
/* If -mrelocatable-lib is linked with an object without -mrelocatable-lib, turn off
|
||
the -mrelocatable-lib, since at least one module isn't relocatable. */
|
||
else if ((old_flags & EF_PPC_RELOCATABLE_LIB) != 0
|
||
&& (new_flags & EF_PPC_RELOCATABLE_LIB) == 0)
|
||
elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
|
||
|
||
|
||
/* Do not warn about eabi vs. V.4 mismatch, just or in the bit if any module uses it */
|
||
elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
|
||
|
||
new_flags &= ~ (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
|
||
old_flags &= ~ (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
|
||
|
||
/* Warn about any other mismatches */
|
||
if (new_flags != old_flags)
|
||
{
|
||
error = true;
|
||
(*_bfd_error_handler)
|
||
("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)",
|
||
bfd_get_filename (ibfd), (long)new_flags, (long)old_flags);
|
||
}
|
||
|
||
if (error)
|
||
{
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return false;
|
||
}
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
|
||
/* Handle a PowerPC specific section when reading an object file. This
|
||
is called when elfcode.h finds a section with an unknown type. */
|
||
|
||
static boolean
|
||
ppc_elf_section_from_shdr (abfd, hdr, name)
|
||
bfd *abfd;
|
||
Elf32_Internal_Shdr *hdr;
|
||
char *name;
|
||
{
|
||
asection *newsect;
|
||
flagword flags;
|
||
|
||
if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
|
||
return false;
|
||
|
||
newsect = hdr->bfd_section;
|
||
flags = bfd_get_section_flags (abfd, newsect);
|
||
if (hdr->sh_flags & SHF_EXCLUDE)
|
||
flags |= SEC_EXCLUDE;
|
||
|
||
if (hdr->sh_type == SHT_ORDERED)
|
||
flags |= SEC_SORT_ENTRIES;
|
||
|
||
bfd_set_section_flags (abfd, newsect, flags);
|
||
return true;
|
||
}
|
||
|
||
|
||
/* Set up any other section flags and such that may be necessary. */
|
||
|
||
static boolean
|
||
ppc_elf_fake_sections (abfd, shdr, asect)
|
||
bfd *abfd;
|
||
Elf32_Internal_Shdr *shdr;
|
||
asection *asect;
|
||
{
|
||
if ((asect->flags & SEC_EXCLUDE) != 0)
|
||
shdr->sh_flags |= SHF_EXCLUDE;
|
||
|
||
if ((asect->flags & SEC_SORT_ENTRIES) != 0)
|
||
shdr->sh_type = SHT_ORDERED;
|
||
|
||
return true;
|
||
}
|
||
|
||
|
||
/* Create a special linker section */
|
||
static elf_linker_section_t *
|
||
ppc_elf_create_linker_section (abfd, info, which)
|
||
bfd *abfd;
|
||
struct bfd_link_info *info;
|
||
enum elf_linker_section_enum which;
|
||
{
|
||
bfd *dynobj = elf_hash_table (info)->dynobj;
|
||
elf_linker_section_t *lsect;
|
||
|
||
/* Record the first bfd section that needs the special section */
|
||
if (!dynobj)
|
||
dynobj = elf_hash_table (info)->dynobj = abfd;
|
||
|
||
/* If this is the first time, create the section */
|
||
lsect = elf_linker_section (dynobj, which);
|
||
if (!lsect)
|
||
{
|
||
elf_linker_section_t defaults;
|
||
static elf_linker_section_t zero_section;
|
||
|
||
defaults = zero_section;
|
||
defaults.which = which;
|
||
defaults.hole_written_p = false;
|
||
defaults.alignment = 2;
|
||
defaults.flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
|
||
| SEC_IN_MEMORY | SEC_LINKER_CREATED);
|
||
|
||
switch (which)
|
||
{
|
||
default:
|
||
(*_bfd_error_handler) ("%s: Unknown special linker type %d",
|
||
bfd_get_filename (abfd),
|
||
(int)which);
|
||
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return (elf_linker_section_t *)0;
|
||
|
||
case LINKER_SECTION_SDATA: /* .sdata/.sbss section */
|
||
defaults.name = ".sdata";
|
||
defaults.rel_name = ".rela.sdata";
|
||
defaults.bss_name = ".sbss";
|
||
defaults.sym_name = "_SDA_BASE_";
|
||
defaults.sym_offset = 32768;
|
||
break;
|
||
|
||
case LINKER_SECTION_SDATA2: /* .sdata2/.sbss2 section */
|
||
defaults.name = ".sdata2";
|
||
defaults.rel_name = ".rela.sdata2";
|
||
defaults.bss_name = ".sbss2";
|
||
defaults.sym_name = "_SDA2_BASE_";
|
||
defaults.sym_offset = 32768;
|
||
defaults.flags |= SEC_READONLY;
|
||
break;
|
||
}
|
||
|
||
lsect = _bfd_elf_create_linker_section (abfd, info, which, &defaults);
|
||
}
|
||
|
||
return lsect;
|
||
}
|
||
|
||
|
||
/* If we have a non-zero sized .sbss2 or .PPC.EMB.sbss0 sections, we need to bump up
|
||
the number of section headers. */
|
||
|
||
static int
|
||
ppc_elf_additional_program_headers (abfd)
|
||
bfd *abfd;
|
||
{
|
||
asection *s;
|
||
int ret;
|
||
|
||
ret = 0;
|
||
|
||
s = bfd_get_section_by_name (abfd, ".interp");
|
||
if (s != NULL)
|
||
++ret;
|
||
|
||
s = bfd_get_section_by_name (abfd, ".sbss2");
|
||
if (s != NULL && (s->flags & SEC_LOAD) != 0 && s->_raw_size > 0)
|
||
++ret;
|
||
|
||
s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
|
||
if (s != NULL && (s->flags & SEC_LOAD) != 0 && s->_raw_size > 0)
|
||
++ret;
|
||
|
||
return ret;
|
||
}
|
||
|
||
/* Modify the segment map if needed */
|
||
|
||
static boolean
|
||
ppc_elf_modify_segment_map (abfd)
|
||
bfd *abfd;
|
||
{
|
||
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
|
||
ppc_elf_adjust_dynamic_symbol (info, h)
|
||
struct bfd_link_info *info;
|
||
struct elf_link_hash_entry *h;
|
||
{
|
||
bfd *dynobj = elf_hash_table (info)->dynobj;
|
||
asection *s;
|
||
unsigned int power_of_two;
|
||
bfd_vma plt_offset;
|
||
|
||
#ifdef DEBUG
|
||
fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n", h->root.root.string);
|
||
#endif
|
||
|
||
/* 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 is a function, put it in the procedure linkage table. We
|
||
will fill in the contents of the procedure linkage table later,
|
||
when we know the address of the .got section. */
|
||
if (h->type == STT_FUNC
|
||
|| (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
|
||
{
|
||
if (! info->shared
|
||
&& (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0
|
||
&& (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0)
|
||
{
|
||
/* This case can occur if we saw a PLT32 reloc in an input
|
||
file, but the symbol was never referred to by a dynamic
|
||
object. In such a case, we don't actually need to build
|
||
a procedure linkage table, and we can just do a PC32
|
||
reloc instead. */
|
||
BFD_ASSERT ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0);
|
||
return true;
|
||
}
|
||
|
||
/* 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;
|
||
}
|
||
|
||
s = bfd_get_section_by_name (dynobj, ".plt");
|
||
BFD_ASSERT (s != NULL);
|
||
|
||
/* If this is the first .plt entry, make room for the special
|
||
first entry. */
|
||
if (s->_raw_size == 0)
|
||
s->_raw_size += PLT_INITIAL_ENTRY_SIZE;
|
||
|
||
/* The PowerPC PLT is actually composed of two parts, the first part
|
||
is 2 words (for a load and a jump), and then there is a remaining
|
||
word available at the end. */
|
||
plt_offset = (PLT_INITIAL_ENTRY_SIZE
|
||
+ 8 * ((s->_raw_size - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE));
|
||
|
||
/* If this symbol is not defined in a regular file, and we are
|
||
not generating a shared library, then set the symbol to this
|
||
location in the .plt. This is required to make function
|
||
pointers compare as equal between the normal executable and
|
||
the shared library. */
|
||
if (! info->shared
|
||
&& (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
|
||
{
|
||
h->root.u.def.section = s;
|
||
h->root.u.def.value = plt_offset;
|
||
}
|
||
|
||
h->plt_offset = plt_offset;
|
||
|
||
/* Make room for this entry. */
|
||
s->_raw_size += PLT_ENTRY_SIZE;
|
||
|
||
/* We also need to make an entry in the .rela.plt section. */
|
||
s = bfd_get_section_by_name (dynobj, ".rela.plt");
|
||
BFD_ASSERT (s != NULL);
|
||
s->_raw_size += sizeof (Elf32_External_Rela);
|
||
|
||
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. */
|
||
|
||
/* If we are creating a shared library, we must presume that the
|
||
only references to the symbol are via the global offset table.
|
||
For such cases we need not do anything here; the relocations will
|
||
be handled correctly by relocate_section. */
|
||
if (info->shared)
|
||
return true;
|
||
|
||
/* We must allocate the symbol in our .dynbss section, which will
|
||
become part of the .bss section of the executable. There will be
|
||
an entry for this symbol in the .dynsym section. The dynamic
|
||
object will contain position independent code, so all references
|
||
from the dynamic object to this symbol will go through the global
|
||
offset table. The dynamic linker will use the .dynsym entry to
|
||
determine the address it must put in the global offset table, so
|
||
both the dynamic object and the regular object will refer to the
|
||
same memory location for the variable. */
|
||
|
||
s = bfd_get_section_by_name (dynobj, ".dynbss");
|
||
BFD_ASSERT (s != NULL);
|
||
|
||
/* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
|
||
copy the initial value out of the dynamic object and into the
|
||
runtime process image. We need to remember the offset into the
|
||
.rela.bss section we are going to use. */
|
||
if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
|
||
{
|
||
asection *srel;
|
||
|
||
srel = bfd_get_section_by_name (dynobj, ".rela.bss");
|
||
BFD_ASSERT (srel != NULL);
|
||
srel->_raw_size += sizeof (Elf32_External_Rela);
|
||
h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
|
||
}
|
||
|
||
/* We need to figure out the alignment required for this symbol. I
|
||
have no idea how ELF linkers handle this. */
|
||
power_of_two = bfd_log2 (h->size);
|
||
if (power_of_two > 3)
|
||
power_of_two = 3;
|
||
|
||
/* Apply the required alignment. */
|
||
s->_raw_size = BFD_ALIGN (s->_raw_size,
|
||
(bfd_size_type) (1 << power_of_two));
|
||
if (power_of_two > bfd_get_section_alignment (dynobj, s))
|
||
{
|
||
if (! bfd_set_section_alignment (dynobj, s, power_of_two))
|
||
return false;
|
||
}
|
||
|
||
/* Define the symbol as being at this point in the section. */
|
||
h->root.u.def.section = s;
|
||
h->root.u.def.value = s->_raw_size;
|
||
|
||
/* Increment the section size to make room for the symbol. */
|
||
s->_raw_size += h->size;
|
||
|
||
return true;
|
||
}
|
||
|
||
|
||
/* Increment the index of a dynamic symbol by a given amount. Called
|
||
via elf_link_hash_traverse. */
|
||
|
||
static boolean
|
||
ppc_elf_adjust_dynindx (h, cparg)
|
||
struct elf_link_hash_entry *h;
|
||
PTR cparg;
|
||
{
|
||
int *cp = (int *) cparg;
|
||
|
||
#ifdef DEBUG
|
||
fprintf (stderr, "ppc_elf_adjust_dynindx called, h->dynindx = %d, *cp = %d\n", h->dynindx, *cp);
|
||
#endif
|
||
|
||
if (h->dynindx != -1)
|
||
h->dynindx += *cp;
|
||
|
||
return true;
|
||
}
|
||
|
||
|
||
/* Set the sizes of the dynamic sections. */
|
||
|
||
static boolean
|
||
ppc_elf_size_dynamic_sections (output_bfd, info)
|
||
bfd *output_bfd;
|
||
struct bfd_link_info *info;
|
||
{
|
||
bfd *dynobj;
|
||
asection *s;
|
||
boolean plt;
|
||
boolean relocs;
|
||
boolean reltext;
|
||
|
||
#ifdef DEBUG
|
||
fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
|
||
#endif
|
||
|
||
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;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
/* We may have created entries in the .rela.got, .rela.sdata, and
|
||
.rela.sdata2 sections. However, if we are not creating the
|
||
dynamic sections, we will not actually use these entries. Reset
|
||
the size of .rela.got, et al, which will cause it to get
|
||
stripped from the output file below. */
|
||
static char *rela_sections[] = { ".rela.got", ".rela.sdata", ".rela.sdata", (char *)0 };
|
||
char **p;
|
||
|
||
for (p = rela_sections; *p != (char *)0; p++)
|
||
{
|
||
s = bfd_get_section_by_name (dynobj, *p);
|
||
if (s != NULL)
|
||
s->_raw_size = 0;
|
||
}
|
||
}
|
||
|
||
/* The check_relocs and adjust_dynamic_symbol entry points have
|
||
determined the sizes of the various dynamic sections. Allocate
|
||
memory for them. */
|
||
plt = false;
|
||
relocs = false;
|
||
reltext = false;
|
||
for (s = dynobj->sections; s != NULL; s = s->next)
|
||
{
|
||
const char *name;
|
||
boolean strip;
|
||
|
||
if ((s->flags & SEC_LINKER_CREATED) == 0)
|
||
continue;
|
||
|
||
/* 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);
|
||
|
||
strip = false;
|
||
|
||
if (strcmp (name, ".plt") == 0)
|
||
{
|
||
if (s->_raw_size == 0)
|
||
{
|
||
/* Strip this section if we don't need it; see the
|
||
comment below. */
|
||
strip = true;
|
||
}
|
||
else
|
||
{
|
||
/* Remember whether there is a PLT. */
|
||
plt = true;
|
||
}
|
||
}
|
||
else if (strncmp (name, ".rela", 5) == 0)
|
||
{
|
||
if (s->_raw_size == 0)
|
||
{
|
||
/* If we don't need this section, strip it from the
|
||
output file. This is mostly to handle .rela.bss and
|
||
.rela.plt. We must create both sections in
|
||
create_dynamic_sections, because they must be created
|
||
before the linker maps input sections to output
|
||
sections. The linker does that before
|
||
adjust_dynamic_symbol is called, and it is that
|
||
function which decides whether anything needs to go
|
||
into these sections. */
|
||
strip = true;
|
||
}
|
||
else
|
||
{
|
||
asection *target;
|
||
const char *outname;
|
||
|
||
/* Remember whether there are any relocation sections. */
|
||
relocs = true;
|
||
|
||
/* If this relocation section applies to a read only
|
||
section, then we probably need a DT_TEXTREL entry. */
|
||
outname = bfd_get_section_name (output_bfd,
|
||
s->output_section);
|
||
target = bfd_get_section_by_name (output_bfd, outname + 5);
|
||
if (target != NULL
|
||
&& (target->flags & SEC_READONLY) != 0)
|
||
reltext = true;
|
||
|
||
/* We use the reloc_count field as a counter if we need
|
||
to copy relocs into the output file. */
|
||
s->reloc_count = 0;
|
||
}
|
||
}
|
||
else if (strcmp (name, ".got") != 0
|
||
&& strcmp (name, ".sdata") != 0
|
||
&& strcmp (name, ".sdata2") != 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_zalloc (dynobj, s->_raw_size);
|
||
if (s->contents == NULL && s->_raw_size != 0)
|
||
return false;
|
||
}
|
||
|
||
if (elf_hash_table (info)->dynamic_sections_created)
|
||
{
|
||
/* Add some entries to the .dynamic section. We fill in the
|
||
values later, in ppc_elf_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 (! bfd_elf32_add_dynamic_entry (info, DT_DEBUG, 0))
|
||
return false;
|
||
}
|
||
|
||
if (plt)
|
||
{
|
||
if (! bfd_elf32_add_dynamic_entry (info, DT_PLTGOT, 0)
|
||
|| ! bfd_elf32_add_dynamic_entry (info, DT_PLTRELSZ, 0)
|
||
|| ! bfd_elf32_add_dynamic_entry (info, DT_PLTREL, DT_RELA)
|
||
|| ! bfd_elf32_add_dynamic_entry (info, DT_JMPREL, 0))
|
||
return false;
|
||
}
|
||
|
||
if (relocs)
|
||
{
|
||
if (! bfd_elf32_add_dynamic_entry (info, DT_RELA, 0)
|
||
|| ! bfd_elf32_add_dynamic_entry (info, DT_RELASZ, 0)
|
||
|| ! bfd_elf32_add_dynamic_entry (info, DT_RELAENT,
|
||
sizeof (Elf32_External_Rela)))
|
||
return false;
|
||
}
|
||
|
||
if (reltext)
|
||
{
|
||
if (! bfd_elf32_add_dynamic_entry (info, DT_TEXTREL, 0))
|
||
return false;
|
||
}
|
||
}
|
||
|
||
/* If we are generating a shared library, 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.
|
||
|
||
FIXME: We assume that there will never be relocations to
|
||
locations in linker-created sections that do not have
|
||
externally-visible names. Instead, we should work out precisely
|
||
which sections relocations are targetted at. */
|
||
if (info->shared)
|
||
{
|
||
int c, i;
|
||
|
||
for (c = 0, s = output_bfd->sections; s != NULL; s = s->next)
|
||
{
|
||
if ((s->flags & SEC_LINKER_CREATED) != 0)
|
||
continue;
|
||
c++;
|
||
}
|
||
|
||
elf_link_hash_traverse (elf_hash_table (info),
|
||
ppc_elf_adjust_dynindx,
|
||
(PTR) &c);
|
||
elf_hash_table (info)->dynsymcount += c;
|
||
|
||
for (i = 1, s = output_bfd->sections; s != NULL; s = s->next)
|
||
{
|
||
if ((s->flags & SEC_LINKER_CREATED) != 0)
|
||
elf_section_data (s)->dynindx = -1;
|
||
else
|
||
{
|
||
elf_section_data (s)->dynindx = i;
|
||
/* These symbols will have no names, so we don't need to
|
||
fiddle with dynstr_index. */
|
||
i++;
|
||
}
|
||
}
|
||
|
||
BFD_ASSERT(i == c + 1);
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
|
||
/* Look through the relocs for a section during the first phase, and
|
||
allocate space in the global offset table or procedure linkage
|
||
table. */
|
||
|
||
static boolean
|
||
ppc_elf_check_relocs (abfd, info, sec, relocs)
|
||
bfd *abfd;
|
||
struct bfd_link_info *info;
|
||
asection *sec;
|
||
const Elf_Internal_Rela *relocs;
|
||
{
|
||
boolean ret = true;
|
||
bfd *dynobj;
|
||
Elf_Internal_Shdr *symtab_hdr;
|
||
struct elf_link_hash_entry **sym_hashes;
|
||
const Elf_Internal_Rela *rel;
|
||
const Elf_Internal_Rela *rel_end;
|
||
bfd_vma *local_got_offsets;
|
||
elf_linker_section_t *sdata;
|
||
elf_linker_section_t *sdata2;
|
||
asection *sreloc;
|
||
asection *sgot;
|
||
asection *srelgot = NULL;
|
||
|
||
if (info->relocateable)
|
||
return true;
|
||
|
||
#ifdef DEBUG
|
||
fprintf (stderr, "ppc_elf_check_relocs called for section %s in %s\n",
|
||
bfd_get_section_name (abfd, sec),
|
||
bfd_get_filename (abfd));
|
||
#endif
|
||
|
||
/* Create the linker generated sections all the time so that the
|
||
special symbols are created. */
|
||
|
||
if ((sdata = elf_linker_section (abfd, LINKER_SECTION_SDATA)) == NULL)
|
||
{
|
||
sdata = ppc_elf_create_linker_section (abfd, info, LINKER_SECTION_SDATA);
|
||
if (!sdata)
|
||
ret = false;
|
||
}
|
||
|
||
|
||
if ((sdata2 = elf_linker_section (abfd, LINKER_SECTION_SDATA2)) == NULL)
|
||
{
|
||
sdata2 = ppc_elf_create_linker_section (abfd, info, LINKER_SECTION_SDATA2);
|
||
if (!sdata2)
|
||
ret = false;
|
||
}
|
||
|
||
dynobj = elf_hash_table (info)->dynobj;
|
||
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
||
sym_hashes = elf_sym_hashes (abfd);
|
||
local_got_offsets = elf_local_got_offsets (abfd);
|
||
|
||
/* FIXME: We should only create the .got section if we need it.
|
||
Otherwise we waste space in a statically linked executable. */
|
||
|
||
if (! _bfd_elf_create_got_section (dynobj, info))
|
||
return false;
|
||
sgot = bfd_get_section_by_name (dynobj, ".got");
|
||
BFD_ASSERT (sgot != 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 < symtab_hdr->sh_info)
|
||
h = NULL;
|
||
else
|
||
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
||
|
||
switch (ELF32_R_TYPE (rel->r_info))
|
||
{
|
||
/* GOT16 relocations */
|
||
case R_PPC_GOT16:
|
||
case R_PPC_GOT16_LO:
|
||
case R_PPC_GOT16_HI:
|
||
case R_PPC_GOT16_HA:
|
||
if (srelgot == NULL
|
||
&& (h != NULL || info->shared))
|
||
{
|
||
srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
|
||
if (srelgot == NULL)
|
||
{
|
||
srelgot = bfd_make_section (dynobj, ".rela.got");
|
||
if (srelgot == NULL
|
||
|| ! bfd_set_section_flags (dynobj, srelgot,
|
||
(SEC_ALLOC
|
||
| SEC_LOAD
|
||
| SEC_HAS_CONTENTS
|
||
| SEC_IN_MEMORY
|
||
| SEC_LINKER_CREATED
|
||
| SEC_READONLY))
|
||
|| ! bfd_set_section_alignment (dynobj, srelgot, 2))
|
||
return false;
|
||
}
|
||
}
|
||
|
||
if (h != NULL)
|
||
{
|
||
if (h->got_offset != (bfd_vma) -1)
|
||
{
|
||
/* We have already allocated space in the .got. */
|
||
break;
|
||
}
|
||
h->got_offset = sgot->_raw_size;
|
||
|
||
/* 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;
|
||
}
|
||
|
||
srelgot->_raw_size += sizeof (Elf32_External_Rela);
|
||
}
|
||
else
|
||
{
|
||
/* This is a global offset table entry for a local
|
||
symbol. */
|
||
if (local_got_offsets == NULL)
|
||
{
|
||
size_t size;
|
||
register unsigned int i;
|
||
|
||
size = symtab_hdr->sh_info * sizeof (bfd_vma);
|
||
local_got_offsets = (bfd_vma *) bfd_alloc (abfd, size);
|
||
if (local_got_offsets == NULL)
|
||
return false;
|
||
elf_local_got_offsets (abfd) = local_got_offsets;
|
||
for (i = 0; i < symtab_hdr->sh_info; i++)
|
||
local_got_offsets[i] = (bfd_vma) -1;
|
||
}
|
||
if (local_got_offsets[r_symndx] != (bfd_vma) -1)
|
||
{
|
||
/* We have already allocated space in the .got. */
|
||
break;
|
||
}
|
||
local_got_offsets[r_symndx] = sgot->_raw_size;
|
||
|
||
if (info->shared)
|
||
{
|
||
/* If we are generating a shared object, we need to
|
||
output a R_PPC_RELATIVE reloc so that the
|
||
dynamic linker can adjust this GOT entry. */
|
||
srelgot->_raw_size += sizeof (Elf32_External_Rela);
|
||
}
|
||
}
|
||
|
||
sgot->_raw_size += 4;
|
||
|
||
break;
|
||
|
||
/* Indirect .sdata relocation */
|
||
case R_PPC_EMB_SDAI16:
|
||
if (info->shared)
|
||
{
|
||
(*_bfd_error_handler) ("%s: relocation %s cannot be used when making a shared object",
|
||
bfd_get_filename (abfd),
|
||
"R_PPC_EMB_SDAI16");
|
||
ret = false;
|
||
break;
|
||
}
|
||
|
||
if (srelgot == NULL
|
||
&& (h != NULL || info->shared))
|
||
{
|
||
srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
|
||
if (srelgot == NULL)
|
||
{
|
||
srelgot = bfd_make_section (dynobj, ".rela.got");
|
||
if (srelgot == NULL
|
||
|| ! bfd_set_section_flags (dynobj, srelgot,
|
||
(SEC_ALLOC
|
||
| SEC_LOAD
|
||
| SEC_HAS_CONTENTS
|
||
| SEC_IN_MEMORY
|
||
| SEC_LINKER_CREATED
|
||
| SEC_READONLY))
|
||
|| ! bfd_set_section_alignment (dynobj, srelgot, 2))
|
||
return false;
|
||
}
|
||
}
|
||
|
||
if (!bfd_elf32_create_pointer_linker_section (abfd, info, sdata, h, rel))
|
||
ret = false;
|
||
|
||
break;
|
||
|
||
/* Indirect .sdata2 relocation */
|
||
case R_PPC_EMB_SDA2I16:
|
||
if (info->shared)
|
||
{
|
||
(*_bfd_error_handler) ("%s: relocation %s cannot be used when making a shared object",
|
||
bfd_get_filename (abfd),
|
||
"R_PPC_EMB_SDA2I16");
|
||
ret = false;
|
||
break;
|
||
}
|
||
|
||
if (srelgot == NULL
|
||
&& (h != NULL || info->shared))
|
||
{
|
||
srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
|
||
if (srelgot == NULL)
|
||
{
|
||
srelgot = bfd_make_section (dynobj, ".rela.got");
|
||
if (srelgot == NULL
|
||
|| ! bfd_set_section_flags (dynobj, srelgot,
|
||
(SEC_ALLOC
|
||
| SEC_LOAD
|
||
| SEC_HAS_CONTENTS
|
||
| SEC_IN_MEMORY
|
||
| SEC_LINKER_CREATED
|
||
| SEC_READONLY))
|
||
|| ! bfd_set_section_alignment (dynobj, srelgot, 2))
|
||
return false;
|
||
}
|
||
}
|
||
|
||
if (!bfd_elf32_create_pointer_linker_section (abfd, info, sdata2, h, rel))
|
||
return false;
|
||
|
||
break;
|
||
|
||
case R_PPC_SDAREL16:
|
||
case R_PPC_EMB_SDA2REL:
|
||
case R_PPC_EMB_SDA21:
|
||
if (info->shared)
|
||
{
|
||
(*_bfd_error_handler) ("%s: relocation %s cannot be used when making a shared object",
|
||
bfd_get_filename (abfd),
|
||
ppc_elf_howto_table[(int)ELF32_R_TYPE (rel->r_info)]->name);
|
||
ret = false;
|
||
}
|
||
break;
|
||
|
||
case R_PPC_PLT32:
|
||
case R_PPC_PLTREL24:
|
||
case R_PPC_PLT16_LO:
|
||
case R_PPC_PLT16_HI:
|
||
case R_PPC_PLT16_HA:
|
||
#ifdef DEBUG
|
||
fprintf (stderr, "Reloc requires a PLT entry\n");
|
||
#endif
|
||
/* This symbol requires a procedure linkage table entry. We
|
||
actually build the entry in adjust_dynamic_symbol,
|
||
because this might be a case of linking PIC code without
|
||
linking in any dynamic objects, in which case we don't
|
||
need to generate a procedure linkage table after all. */
|
||
|
||
if (h == NULL)
|
||
{
|
||
/* It does not make sense to have a procedure linkage
|
||
table entry for a local symbol. */
|
||
bfd_set_error (bfd_error_bad_value);
|
||
ret = false;
|
||
break;
|
||
}
|
||
|
||
/* Make sure this symbol is output as a dynamic symbol. */
|
||
if (h->dynindx == -1)
|
||
{
|
||
if (! bfd_elf32_link_record_dynamic_symbol (info, h))
|
||
{
|
||
ret = false;
|
||
break;
|
||
}
|
||
}
|
||
|
||
h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
|
||
break;
|
||
|
||
/* The following relocations don't need to propagate the
|
||
relocation if linking a shared object since they are
|
||
section relative. */
|
||
case R_PPC_SECTOFF:
|
||
case R_PPC_SECTOFF_LO:
|
||
case R_PPC_SECTOFF_HI:
|
||
case R_PPC_SECTOFF_HA:
|
||
break;
|
||
|
||
/* This refers only to functions defined in the shared library */
|
||
case R_PPC_LOCAL24PC:
|
||
break;
|
||
|
||
/* When creating a shared object, we must copy these
|
||
relocs into the output file. We create a reloc
|
||
section in dynobj and make room for the reloc. */
|
||
case R_PPC_REL24:
|
||
if (h != NULL
|
||
&& strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
|
||
break;
|
||
/* fall through */
|
||
|
||
case R_PPC_REL14:
|
||
case R_PPC_REL14_BRTAKEN:
|
||
case R_PPC_REL14_BRNTAKEN:
|
||
if (h == NULL)
|
||
break;
|
||
/* fall through */
|
||
|
||
default:
|
||
if (info->shared)
|
||
{
|
||
#ifdef DEBUG
|
||
fprintf (stderr, "ppc_elf_check_relocs need to create relocation for %s\n",
|
||
(h && h->root.root.string) ? h->root.root.string : "<unknown>");
|
||
#endif
|
||
if (sreloc == NULL)
|
||
{
|
||
const char *name;
|
||
|
||
name = (bfd_elf_string_from_elf_section
|
||
(abfd,
|
||
elf_elfheader (abfd)->e_shstrndx,
|
||
elf_section_data (sec)->rel_hdr.sh_name));
|
||
if (name == NULL)
|
||
{
|
||
ret = false;
|
||
break;
|
||
}
|
||
|
||
BFD_ASSERT (strncmp (name, ".rela", 5) == 0
|
||
&& strcmp (bfd_get_section_name (abfd, sec),
|
||
name + 5) == 0);
|
||
|
||
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_LINKER_CREATED
|
||
| SEC_READONLY))
|
||
|| ! bfd_set_section_alignment (dynobj, sreloc, 2))
|
||
{
|
||
ret = false;
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
sreloc->_raw_size += sizeof (Elf32_External_Rela);
|
||
}
|
||
|
||
break;
|
||
}
|
||
}
|
||
|
||
return ret;
|
||
}
|
||
|
||
|
||
/* Hook called by the linker routine which adds symbols from an object
|
||
file. We use it to put .comm items in .sbss, and not .bss. */
|
||
|
||
/*ARGSUSED*/
|
||
static boolean
|
||
ppc_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 (sym->st_shndx == SHN_COMMON && !info->relocateable && sym->st_size <= bfd_get_gp_size (abfd))
|
||
{
|
||
/* Common symbols less than or equal to -G nn bytes are automatically
|
||
put into .sdata. */
|
||
elf_linker_section_t *sdata = ppc_elf_create_linker_section (abfd, info, LINKER_SECTION_SDATA);
|
||
if (!sdata->bss_section)
|
||
{
|
||
/* We don't go through bfd_make_section, because we don't
|
||
want to attach this common section to DYNOBJ. The linker
|
||
will move the symbols to the appropriate output section
|
||
when it defines common symbols. */
|
||
sdata->bss_section = ((asection *)
|
||
bfd_zalloc (abfd, sizeof (asection)));
|
||
if (sdata->bss_section == NULL)
|
||
return false;
|
||
sdata->bss_section->name = sdata->bss_name;
|
||
sdata->bss_section->flags = SEC_IS_COMMON;
|
||
sdata->bss_section->output_section = sdata->bss_section;
|
||
sdata->bss_section->symbol =
|
||
(asymbol *) bfd_zalloc (abfd, sizeof (asymbol));
|
||
sdata->bss_section->symbol_ptr_ptr =
|
||
(asymbol **) bfd_zalloc (abfd, sizeof (asymbol *));
|
||
if (sdata->bss_section->symbol == NULL
|
||
|| sdata->bss_section->symbol_ptr_ptr == NULL)
|
||
return false;
|
||
sdata->bss_section->symbol->name = sdata->bss_name;
|
||
sdata->bss_section->symbol->flags = BSF_SECTION_SYM;
|
||
sdata->bss_section->symbol->section = sdata->bss_section;
|
||
*sdata->bss_section->symbol_ptr_ptr = sdata->bss_section->symbol;
|
||
}
|
||
|
||
*secp = sdata->bss_section;
|
||
*valp = sym->st_size;
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
|
||
/* Finish up dynamic symbol handling. We set the contents of various
|
||
dynamic sections here. */
|
||
|
||
static boolean
|
||
ppc_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;
|
||
|
||
#ifdef DEBUG
|
||
fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s", h->root.root.string);
|
||
#endif
|
||
|
||
dynobj = elf_hash_table (info)->dynobj;
|
||
BFD_ASSERT (dynobj != NULL);
|
||
|
||
if (h->plt_offset != (bfd_vma) -1)
|
||
{
|
||
asection *splt;
|
||
asection *srela;
|
||
Elf_Internal_Rela rela;
|
||
|
||
#ifdef DEBUG
|
||
fprintf (stderr, ", plt_offset = %d", h->plt_offset);
|
||
#endif
|
||
|
||
/* This symbol has an entry in the procedure linkage table. Set
|
||
it up. */
|
||
|
||
BFD_ASSERT (h->dynindx != -1);
|
||
|
||
splt = bfd_get_section_by_name (dynobj, ".plt");
|
||
srela = bfd_get_section_by_name (dynobj, ".rela.plt");
|
||
BFD_ASSERT (splt != NULL && srela != NULL);
|
||
|
||
/* We don't need to fill in the .plt. The ppc dynamic linker
|
||
will fill it in. */
|
||
|
||
/* Fill in the entry in the .rela.plt section. */
|
||
rela.r_offset = (splt->output_section->vma
|
||
+ splt->output_offset
|
||
+ h->plt_offset);
|
||
rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
|
||
rela.r_addend = 0;
|
||
bfd_elf32_swap_reloca_out (output_bfd, &rela,
|
||
((Elf32_External_Rela *) srela->contents
|
||
+ ((h->plt_offset - PLT_INITIAL_ENTRY_SIZE) / 8)));
|
||
|
||
if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
|
||
{
|
||
/* Mark the symbol as undefined, rather than as defined in
|
||
the .plt section. Leave the value alone. */
|
||
sym->st_shndx = SHN_UNDEF;
|
||
}
|
||
}
|
||
|
||
if (h->got_offset != (bfd_vma) -1)
|
||
{
|
||
asection *sgot;
|
||
asection *srela;
|
||
Elf_Internal_Rela rela;
|
||
|
||
/* This symbol has an entry in the global offset table. Set it
|
||
up. */
|
||
|
||
BFD_ASSERT (h->dynindx != -1);
|
||
|
||
sgot = bfd_get_section_by_name (dynobj, ".got");
|
||
srela = bfd_get_section_by_name (dynobj, ".rela.got");
|
||
BFD_ASSERT (sgot != NULL && srela != NULL);
|
||
|
||
rela.r_offset = (sgot->output_section->vma
|
||
+ sgot->output_offset
|
||
+ (h->got_offset &~ 1));
|
||
|
||
/* If this is a -Bsymbolic link, and the symbol is defined
|
||
locally, we just want to emit a RELATIVE reloc. The entry in
|
||
the global offset table will already have been initialized in
|
||
the relocate_section function. */
|
||
if (info->shared
|
||
&& info->symbolic
|
||
&& (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
|
||
rela.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
|
||
else
|
||
{
|
||
bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got_offset);
|
||
rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_GLOB_DAT);
|
||
}
|
||
|
||
rela.r_addend = 0;
|
||
bfd_elf32_swap_reloca_out (output_bfd, &rela,
|
||
((Elf32_External_Rela *) srela->contents
|
||
+ srela->reloc_count));
|
||
++srela->reloc_count;
|
||
}
|
||
|
||
if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
|
||
{
|
||
asection *s;
|
||
Elf_Internal_Rela rela;
|
||
|
||
/* This symbols needs a copy reloc. Set it up. */
|
||
|
||
#ifdef DEBUG
|
||
fprintf (stderr, ", copy");
|
||
#endif
|
||
|
||
BFD_ASSERT (h->dynindx != -1);
|
||
|
||
s = bfd_get_section_by_name (h->root.u.def.section->owner,
|
||
".rela.bss");
|
||
BFD_ASSERT (s != NULL);
|
||
|
||
rela.r_offset = (h->root.u.def.value
|
||
+ h->root.u.def.section->output_section->vma
|
||
+ h->root.u.def.section->output_offset);
|
||
rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
|
||
rela.r_addend = 0;
|
||
bfd_elf32_swap_reloca_out (output_bfd, &rela,
|
||
((Elf32_External_Rela *) s->contents
|
||
+ s->reloc_count));
|
||
++s->reloc_count;
|
||
}
|
||
|
||
#ifdef DEBUG
|
||
fprintf (stderr, "\n");
|
||
#endif
|
||
|
||
/* Mark some specially defined symbols as absolute. */
|
||
if (strcmp (h->root.root.string, "_DYNAMIC") == 0
|
||
|| strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
|
||
|| strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0)
|
||
sym->st_shndx = SHN_ABS;
|
||
|
||
return true;
|
||
}
|
||
|
||
|
||
/* Finish up the dynamic sections. */
|
||
|
||
static boolean
|
||
ppc_elf_finish_dynamic_sections (output_bfd, info)
|
||
bfd *output_bfd;
|
||
struct bfd_link_info *info;
|
||
{
|
||
asection *sdyn;
|
||
bfd *dynobj = elf_hash_table (info)->dynobj;
|
||
asection *sgot = bfd_get_section_by_name (dynobj, ".got");
|
||
|
||
#ifdef DEBUG
|
||
fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
|
||
#endif
|
||
|
||
sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
|
||
|
||
if (elf_hash_table (info)->dynamic_sections_created)
|
||
{
|
||
asection *splt;
|
||
Elf32_External_Dyn *dyncon, *dynconend;
|
||
|
||
splt = bfd_get_section_by_name (dynobj, ".plt");
|
||
BFD_ASSERT (splt != NULL && sdyn != 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;
|
||
boolean size;
|
||
|
||
bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
|
||
|
||
switch (dyn.d_tag)
|
||
{
|
||
case DT_PLTGOT: name = ".plt"; size = false; break;
|
||
case DT_PLTRELSZ: name = ".rela.plt"; size = true; break;
|
||
case DT_JMPREL: name = ".rela.plt"; size = false; break;
|
||
default: name = NULL; size = false; break;
|
||
}
|
||
|
||
if (name != NULL)
|
||
{
|
||
asection *s;
|
||
|
||
s = bfd_get_section_by_name (output_bfd, name);
|
||
if (s == NULL)
|
||
dyn.d_un.d_val = 0;
|
||
else
|
||
{
|
||
if (! size)
|
||
dyn.d_un.d_ptr = s->vma;
|
||
else
|
||
{
|
||
if (s->_cooked_size != 0)
|
||
dyn.d_un.d_val = s->_cooked_size;
|
||
else
|
||
dyn.d_un.d_val = s->_raw_size;
|
||
}
|
||
}
|
||
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can
|
||
easily find the address of the _GLOBAL_OFFSET_TABLE_. */
|
||
if (sgot)
|
||
{
|
||
unsigned char *contents = sgot->contents;
|
||
bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, contents);
|
||
|
||
if (sdyn == NULL)
|
||
bfd_put_32 (output_bfd, (bfd_vma) 0, contents+4);
|
||
else
|
||
bfd_put_32 (output_bfd,
|
||
sdyn->output_section->vma + sdyn->output_offset,
|
||
contents+4);
|
||
|
||
elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
|
||
}
|
||
|
||
if (info->shared)
|
||
{
|
||
asection *sdynsym;
|
||
asection *s;
|
||
Elf_Internal_Sym sym;
|
||
int maxdindx = 0;
|
||
|
||
/* Set up the section symbols for the output sections. */
|
||
|
||
sdynsym = bfd_get_section_by_name (dynobj, ".dynsym");
|
||
BFD_ASSERT (sdynsym != NULL);
|
||
|
||
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, dindx;
|
||
|
||
sym.st_value = s->vma;
|
||
|
||
indx = elf_section_data (s)->this_idx;
|
||
dindx = elf_section_data (s)->dynindx;
|
||
if (dindx != -1)
|
||
{
|
||
BFD_ASSERT(indx > 0);
|
||
BFD_ASSERT(dindx > 0);
|
||
|
||
if (dindx > maxdindx)
|
||
maxdindx = dindx;
|
||
|
||
sym.st_shndx = indx;
|
||
|
||
bfd_elf32_swap_symbol_out (output_bfd, &sym,
|
||
(PTR) (((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 =
|
||
maxdindx + 1;
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
|
||
/* The RELOCATE_SECTION function is called by the ELF backend linker
|
||
to handle the relocations for a section.
|
||
|
||
The relocs are always passed as Rela structures; if the section
|
||
actually uses Rel structures, the r_addend field will always be
|
||
zero.
|
||
|
||
This function is responsible for adjust the section contents as
|
||
necessary, and (if using Rela relocs and generating a
|
||
relocateable output file) adjusting the reloc addend as
|
||
necessary.
|
||
|
||
This function does not have to worry about setting the reloc
|
||
address or the reloc symbol index.
|
||
|
||
LOCAL_SYMS is a pointer to the swapped in local symbols.
|
||
|
||
LOCAL_SECTIONS is an array giving the section in the input file
|
||
corresponding to the st_shndx field of each local symbol.
|
||
|
||
The global hash table entry for the global symbols can be found
|
||
via elf_sym_hashes (input_bfd).
|
||
|
||
When generating relocateable output, this function must handle
|
||
STB_LOCAL/STT_SECTION symbols specially. The output symbol is
|
||
going to be the section symbol corresponding to the output
|
||
section, which means that the addend must be adjusted
|
||
accordingly. */
|
||
|
||
static boolean
|
||
ppc_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 = &elf_tdata (input_bfd)->symtab_hdr;
|
||
struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd);
|
||
bfd *dynobj = elf_hash_table (info)->dynobj;
|
||
elf_linker_section_t *sdata = (dynobj) ? elf_linker_section (dynobj, LINKER_SECTION_SDATA) : NULL;
|
||
elf_linker_section_t *sdata2 = (dynobj) ? elf_linker_section (dynobj, LINKER_SECTION_SDATA2) : NULL;
|
||
Elf_Internal_Rela *rel = relocs;
|
||
Elf_Internal_Rela *relend = relocs + input_section->reloc_count;
|
||
asection *sreloc = NULL;
|
||
asection *splt = NULL;
|
||
asection *sgot = NULL;
|
||
bfd_vma *local_got_offsets;
|
||
boolean ret = true;
|
||
long insn;
|
||
|
||
#ifdef DEBUG
|
||
fprintf (stderr, "ppc_elf_relocate_section called for %s section %s, %ld relocations%s\n",
|
||
bfd_get_filename (input_bfd),
|
||
bfd_section_name(input_bfd, input_section),
|
||
(long)input_section->reloc_count,
|
||
(info->relocateable) ? " (relocatable)" : "");
|
||
#endif
|
||
|
||
if (!ppc_elf_howto_table[ R_PPC_ADDR32 ]) /* Initialize howto table if needed */
|
||
ppc_elf_howto_init ();
|
||
|
||
local_got_offsets = elf_local_got_offsets (input_bfd);
|
||
|
||
for (; rel < relend; rel++)
|
||
{
|
||
enum ppc_reloc_type r_type = (enum ppc_reloc_type)ELF32_R_TYPE (rel->r_info);
|
||
bfd_vma offset = rel->r_offset;
|
||
bfd_vma addend = rel->r_addend;
|
||
bfd_reloc_status_type r = bfd_reloc_other;
|
||
Elf_Internal_Sym *sym = (Elf_Internal_Sym *)0;
|
||
asection *sec = (asection *)0;
|
||
struct elf_link_hash_entry *h = (struct elf_link_hash_entry *)0;
|
||
const char *sym_name = (const char *)0;
|
||
reloc_howto_type *howto;
|
||
unsigned long r_symndx;
|
||
bfd_vma relocation;
|
||
|
||
/* Unknown relocation handling */
|
||
if ((unsigned)r_type >= (unsigned)R_PPC_max || !ppc_elf_howto_table[(int)r_type])
|
||
{
|
||
(*_bfd_error_handler) ("%s: unknown relocation type %d",
|
||
bfd_get_filename (input_bfd),
|
||
(int)r_type);
|
||
|
||
bfd_set_error (bfd_error_bad_value);
|
||
ret = false;
|
||
continue;
|
||
}
|
||
|
||
howto = ppc_elf_howto_table[(int)r_type];
|
||
r_symndx = ELF32_R_SYM (rel->r_info);
|
||
|
||
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 < symtab_hdr->sh_info)
|
||
{
|
||
sym = local_syms + r_symndx;
|
||
if ((unsigned)ELF_ST_TYPE (sym->st_info) == STT_SECTION)
|
||
{
|
||
sec = local_sections[r_symndx];
|
||
addend = rel->r_addend += sec->output_offset + sym->st_value;
|
||
}
|
||
}
|
||
|
||
#ifdef DEBUG
|
||
fprintf (stderr, "\ttype = %s (%d), symbol index = %ld, offset = %ld, addend = %ld\n",
|
||
howto->name,
|
||
(int)r_type,
|
||
r_symndx,
|
||
(long)offset,
|
||
(long)addend);
|
||
#endif
|
||
continue;
|
||
}
|
||
|
||
/* This is a final link. */
|
||
if (r_symndx < symtab_hdr->sh_info)
|
||
{
|
||
sym = local_syms + r_symndx;
|
||
sec = local_sections[r_symndx];
|
||
sym_name = "<local symbol>";
|
||
|
||
relocation = (sec->output_section->vma
|
||
+ sec->output_offset
|
||
+ sym->st_value);
|
||
}
|
||
else
|
||
{
|
||
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
||
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;
|
||
sym_name = h->root.root.string;
|
||
if (h->root.type == bfd_link_hash_defined
|
||
|| h->root.type == bfd_link_hash_defweak)
|
||
{
|
||
sec = h->root.u.def.section;
|
||
if ((r_type == R_PPC_PLT32
|
||
&& h->plt_offset != (bfd_vma) -1)
|
||
|| ((r_type == R_PPC_GOT16
|
||
|| r_type == R_PPC_GOT16_LO
|
||
|| r_type == R_PPC_GOT16_HI
|
||
|| r_type == R_PPC_GOT16_HA)
|
||
&& elf_hash_table (info)->dynamic_sections_created
|
||
&& (! info->shared
|
||
|| ! info->symbolic
|
||
|| (h->elf_link_hash_flags
|
||
& ELF_LINK_HASH_DEF_REGULAR) == 0))
|
||
|| (info->shared
|
||
&& (! info->symbolic
|
||
|| (h->elf_link_hash_flags
|
||
& ELF_LINK_HASH_DEF_REGULAR) == 0)
|
||
&& (input_section->flags & SEC_ALLOC) != 0
|
||
&& (r_type == R_PPC_ADDR32
|
||
|| r_type == R_PPC_ADDR24
|
||
|| r_type == R_PPC_ADDR16
|
||
|| r_type == R_PPC_ADDR16_LO
|
||
|| r_type == R_PPC_ADDR16_HI
|
||
|| r_type == R_PPC_ADDR16_HA
|
||
|| r_type == R_PPC_ADDR14
|
||
|| r_type == R_PPC_ADDR14_BRTAKEN
|
||
|| r_type == R_PPC_ADDR14_BRNTAKEN
|
||
|| r_type == R_PPC_PLTREL24
|
||
|| r_type == R_PPC_COPY
|
||
|| r_type == R_PPC_GLOB_DAT
|
||
|| r_type == R_PPC_JMP_SLOT
|
||
|| r_type == R_PPC_UADDR32
|
||
|| r_type == R_PPC_UADDR16
|
||
|| r_type == R_PPC_REL32
|
||
|| r_type == R_PPC_SDAREL16
|
||
|| r_type == R_PPC_EMB_NADDR32
|
||
|| r_type == R_PPC_EMB_NADDR16
|
||
|| r_type == R_PPC_EMB_NADDR16_LO
|
||
|| r_type == R_PPC_EMB_NADDR16_HI
|
||
|| r_type == R_PPC_EMB_NADDR16_HA
|
||
|| r_type == R_PPC_EMB_SDAI16
|
||
|| r_type == R_PPC_EMB_SDA2I16
|
||
|| r_type == R_PPC_EMB_SDA2REL
|
||
|| r_type == R_PPC_EMB_SDA21
|
||
|| r_type == R_PPC_EMB_MRKREF
|
||
|| r_type == R_PPC_EMB_BIT_FLD
|
||
|| r_type == R_PPC_EMB_RELSDA
|
||
|| ((r_type == R_PPC_REL24
|
||
|| r_type == R_PPC_REL14
|
||
|| r_type == R_PPC_REL14_BRTAKEN
|
||
|| r_type == R_PPC_REL14_BRNTAKEN
|
||
|| r_type == R_PPC_RELATIVE)
|
||
&& strcmp (h->root.root.string,
|
||
"_GLOBAL_OFFSET_TABLE_") != 0))))
|
||
{
|
||
/* In these cases, we don't need the relocation
|
||
value. We check specially because in some
|
||
obscure cases sec->output_section will be 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)
|
||
relocation = 0;
|
||
else
|
||
{
|
||
(*info->callbacks->undefined_symbol)(info,
|
||
h->root.root.string,
|
||
input_bfd,
|
||
input_section,
|
||
rel->r_offset);
|
||
ret = false;
|
||
continue;
|
||
}
|
||
}
|
||
|
||
switch ((int)r_type)
|
||
{
|
||
default:
|
||
(*_bfd_error_handler) ("%s: unknown relocation type %d for symbol %s",
|
||
bfd_get_filename (input_bfd),
|
||
(int)r_type, sym_name);
|
||
|
||
bfd_set_error (bfd_error_bad_value);
|
||
ret = false;
|
||
continue;
|
||
|
||
/* relocations that need no special processing */
|
||
case (int)R_PPC_LOCAL24PC:
|
||
break;
|
||
|
||
case (int)R_PPC_REL24:
|
||
case (int)R_PPC_REL14:
|
||
if (h == NULL
|
||
|| strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
|
||
break;
|
||
/* fall through */
|
||
|
||
/* Relocations that need to be propagated if this is a shared
|
||
object. */
|
||
case (int)R_PPC_NONE:
|
||
case (int)R_PPC_ADDR32:
|
||
case (int)R_PPC_ADDR24:
|
||
case (int)R_PPC_ADDR16:
|
||
case (int)R_PPC_ADDR16_LO:
|
||
case (int)R_PPC_ADDR16_HI:
|
||
case (int)R_PPC_ADDR16_HA:
|
||
case (int)R_PPC_ADDR14:
|
||
case (int)R_PPC_UADDR32:
|
||
case (int)R_PPC_UADDR16:
|
||
case (int)R_PPC_REL32:
|
||
if (info->shared)
|
||
{
|
||
Elf_Internal_Rela outrel;
|
||
boolean skip;
|
||
|
||
#ifdef DEBUG
|
||
fprintf (stderr, "ppc_elf_relocate_section need to create relocation for %s\n",
|
||
(h && h->root.root.string) ? h->root.root.string : "<unknown>");
|
||
#endif
|
||
|
||
/* When generating a shared object, these relocations
|
||
are copied into the output file to be resolved at run
|
||
time. */
|
||
|
||
if (sreloc == NULL)
|
||
{
|
||
const char *name;
|
||
|
||
name = (bfd_elf_string_from_elf_section
|
||
(input_bfd,
|
||
elf_elfheader (input_bfd)->e_shstrndx,
|
||
elf_section_data (input_section)->rel_hdr.sh_name));
|
||
if (name == NULL)
|
||
return false;
|
||
|
||
BFD_ASSERT (strncmp (name, ".rela", 5) == 0
|
||
&& strcmp (bfd_get_section_name (input_bfd,
|
||
input_section),
|
||
name + 5) == 0);
|
||
|
||
sreloc = bfd_get_section_by_name (dynobj, name);
|
||
BFD_ASSERT (sreloc != NULL);
|
||
}
|
||
|
||
skip = false;
|
||
|
||
if (elf_section_data (input_section)->stab_info == NULL)
|
||
outrel.r_offset = rel->r_offset;
|
||
else
|
||
{
|
||
bfd_vma off;
|
||
|
||
off = (_bfd_stab_section_offset
|
||
(output_bfd, &elf_hash_table (info)->stab_info,
|
||
input_section,
|
||
&elf_section_data (input_section)->stab_info,
|
||
rel->r_offset));
|
||
if (off == (bfd_vma) -1)
|
||
skip = true;
|
||
outrel.r_offset = off;
|
||
}
|
||
|
||
outrel.r_offset += (input_section->output_section->vma
|
||
+ input_section->output_offset);
|
||
|
||
if (skip)
|
||
memset (&outrel, 0, sizeof outrel);
|
||
/* h->dynindx may be -1 if this symbol was marked to
|
||
become local. */
|
||
else if (h != NULL
|
||
&& ((! info->symbolic && h->dynindx != -1)
|
||
|| (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_type);
|
||
outrel.r_addend = rel->r_addend;
|
||
}
|
||
else
|
||
{
|
||
if (r_type == R_PPC_ADDR32)
|
||
{
|
||
outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
|
||
outrel.r_addend = relocation + rel->r_addend;
|
||
}
|
||
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;
|
||
BFD_ASSERT(indx > 0);
|
||
}
|
||
|
||
outrel.r_info = ELF32_R_INFO (indx, r_type);
|
||
outrel.r_addend = relocation + rel->r_addend;
|
||
}
|
||
}
|
||
|
||
bfd_elf32_swap_reloca_out (output_bfd, &outrel,
|
||
(((Elf32_External_Rela *)
|
||
sreloc->contents)
|
||
+ sreloc->reloc_count));
|
||
++sreloc->reloc_count;
|
||
|
||
/* This reloc will be computed at runtime, so there's no
|
||
need to do anything now, unless this is a RELATIVE
|
||
reloc in an unallocated section. */
|
||
if (skip
|
||
|| (input_section->flags & SEC_ALLOC) != 0
|
||
|| ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE)
|
||
continue;
|
||
}
|
||
|
||
/* Arithmetic adjust relocations that aren't going into a
|
||
shared object. */
|
||
if (r_type == R_PPC_ADDR16_HA
|
||
/* It's just possible that this symbol is a weak symbol
|
||
that's not actually defined anywhere. In that case,
|
||
'sec' would be NULL, and we should leave the symbol
|
||
alone (it will be set to zero elsewhere in the link). */
|
||
&& sec != NULL)
|
||
{
|
||
addend += ((relocation + addend) & 0x8000) << 1;
|
||
}
|
||
break;
|
||
|
||
/* branch taken prediction relocations */
|
||
case (int)R_PPC_ADDR14_BRTAKEN:
|
||
case (int)R_PPC_REL14_BRTAKEN:
|
||
insn = bfd_get_32 (output_bfd, contents + offset);
|
||
if ((relocation - offset) & 0x8000)
|
||
insn &= ~BRANCH_PREDICT_BIT;
|
||
else
|
||
insn |= BRANCH_PREDICT_BIT;
|
||
bfd_put_32 (output_bfd, insn, contents + offset);
|
||
break;
|
||
|
||
/* branch not taken predicition relocations */
|
||
case (int)R_PPC_ADDR14_BRNTAKEN:
|
||
case (int)R_PPC_REL14_BRNTAKEN:
|
||
insn = bfd_get_32 (output_bfd, contents + offset);
|
||
if ((relocation - offset) & 0x8000)
|
||
insn |= BRANCH_PREDICT_BIT;
|
||
else
|
||
insn &= ~BRANCH_PREDICT_BIT;
|
||
bfd_put_32 (output_bfd, insn, contents + offset);
|
||
break;
|
||
|
||
/* GOT16 relocations */
|
||
case (int)R_PPC_GOT16:
|
||
case (int)R_PPC_GOT16_LO:
|
||
case (int)R_PPC_GOT16_HI:
|
||
case (int)R_PPC_GOT16_HA:
|
||
/* Relocation is to the entry for this symbol in the global
|
||
offset table. */
|
||
if (sgot == NULL)
|
||
{
|
||
sgot = bfd_get_section_by_name (dynobj, ".got");
|
||
BFD_ASSERT (sgot != NULL);
|
||
}
|
||
|
||
if (h != NULL)
|
||
{
|
||
bfd_vma off;
|
||
|
||
off = h->got_offset;
|
||
BFD_ASSERT (off != (bfd_vma) -1);
|
||
|
||
if (! elf_hash_table (info)->dynamic_sections_created
|
||
|| (info->shared
|
||
&& info->symbolic
|
||
&& (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)))
|
||
{
|
||
/* This is actually a static link, or it is a
|
||
-Bsymbolic link and the symbol is defined
|
||
locally. We must initialize this entry in the
|
||
global offset table. Since the offset must
|
||
always be a multiple of 4, we use the least
|
||
significant bit to record whether we have
|
||
initialized it already.
|
||
|
||
When doing a dynamic link, we create a .rela.got
|
||
relocation entry to initialize the value. This
|
||
is done in the finish_dynamic_symbol routine. */
|
||
if ((off & 1) != 0)
|
||
off &= ~1;
|
||
else
|
||
{
|
||
bfd_put_32 (output_bfd, relocation + addend,
|
||
sgot->contents + off);
|
||
h->got_offset |= 1;
|
||
}
|
||
}
|
||
|
||
relocation = sgot->output_offset + off - 4;
|
||
addend = 0;
|
||
}
|
||
else
|
||
{
|
||
bfd_vma off;
|
||
|
||
BFD_ASSERT (local_got_offsets != NULL
|
||
&& local_got_offsets[r_symndx] != (bfd_vma) -1);
|
||
|
||
off = local_got_offsets[r_symndx];
|
||
|
||
/* The offset must always be a multiple of 4. We use
|
||
the least significant bit to record whether we have
|
||
already processed this entry. */
|
||
if ((off & 1) != 0)
|
||
off &= ~1;
|
||
else
|
||
{
|
||
bfd_put_32 (output_bfd, relocation, sgot->contents + off);
|
||
|
||
if (info->shared)
|
||
{
|
||
asection *srelgot;
|
||
Elf_Internal_Rela outrel;
|
||
|
||
/* We need to generate a R_PPC_RELATIVE reloc
|
||
for the dynamic linker. */
|
||
srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
|
||
BFD_ASSERT (srelgot != NULL);
|
||
|
||
outrel.r_offset = (sgot->output_section->vma
|
||
+ sgot->output_offset
|
||
+ off);
|
||
outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
|
||
outrel.r_addend = relocation + addend;
|
||
bfd_elf32_swap_reloca_out (output_bfd, &outrel,
|
||
(((Elf32_External_Rela *)
|
||
srelgot->contents)
|
||
+ srelgot->reloc_count));
|
||
++srelgot->reloc_count;
|
||
}
|
||
|
||
local_got_offsets[r_symndx] |= 1;
|
||
}
|
||
|
||
relocation = sgot->output_offset + off - 4;
|
||
addend = 0;
|
||
}
|
||
|
||
break;
|
||
|
||
/* Indirect .sdata relocation */
|
||
case (int)R_PPC_EMB_SDAI16:
|
||
BFD_ASSERT (sdata != NULL);
|
||
relocation = bfd_elf32_finish_pointer_linker_section (output_bfd, input_bfd, info,
|
||
sdata, h, relocation, rel,
|
||
R_PPC_RELATIVE);
|
||
break;
|
||
|
||
/* Indirect .sdata2 relocation */
|
||
case (int)R_PPC_EMB_SDA2I16:
|
||
BFD_ASSERT (sdata2 != NULL);
|
||
relocation = bfd_elf32_finish_pointer_linker_section (output_bfd, input_bfd, info,
|
||
sdata2, h, relocation, rel,
|
||
R_PPC_RELATIVE);
|
||
break;
|
||
|
||
/* Handle the TOC16 reloc. We want to use the offset within the .got
|
||
section, not the actual VMA. This is appropriate when generating
|
||
an embedded ELF object, for which the .got section acts like the
|
||
AIX .toc section. */
|
||
case (int)R_PPC_TOC16: /* phony GOT16 relocations */
|
||
BFD_ASSERT (sec != (asection *)0);
|
||
BFD_ASSERT (bfd_is_und_section (sec)
|
||
|| strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
|
||
|| strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0)
|
||
|
||
addend -= sec->output_section->vma + sec->output_offset + 0x8000;
|
||
break;
|
||
|
||
case (int)R_PPC_PLTREL24:
|
||
/* Relocation is to the entry for this symbol in the
|
||
procedure linkage table. */
|
||
BFD_ASSERT (h != NULL);
|
||
|
||
if (h->plt_offset == (bfd_vma) -1)
|
||
{
|
||
/* We didn't make a PLT entry for this symbol. This
|
||
happens when statically linking PIC code, or when
|
||
using -Bsymbolic. */
|
||
break;
|
||
}
|
||
|
||
if (splt == NULL)
|
||
{
|
||
splt = bfd_get_section_by_name (dynobj, ".plt");
|
||
BFD_ASSERT (splt != NULL);
|
||
}
|
||
|
||
relocation = (splt->output_section->vma
|
||
+ splt->output_offset
|
||
+ h->plt_offset);
|
||
break;
|
||
|
||
/* relocate against _SDA_BASE_ */
|
||
case (int)R_PPC_SDAREL16:
|
||
BFD_ASSERT (sec != (asection *)0);
|
||
if (strcmp (bfd_get_section_name (abfd, sec), ".sdata") != 0
|
||
&& strcmp (bfd_get_section_name (abfd, sec), ".sbss") != 0)
|
||
{
|
||
(*_bfd_error_handler) ("%s: The target (%s) of a %s relocation is in the wrong section (%s)",
|
||
bfd_get_filename (input_bfd),
|
||
sym_name,
|
||
ppc_elf_howto_table[ (int)r_type ]->name,
|
||
bfd_get_section_name (abfd, sec));
|
||
|
||
bfd_set_error (bfd_error_bad_value);
|
||
ret = false;
|
||
continue;
|
||
}
|
||
addend -= (sdata->sym_hash->root.u.def.value
|
||
+ sdata->sym_hash->root.u.def.section->output_section->vma
|
||
+ sdata->sym_hash->root.u.def.section->output_offset);
|
||
break;
|
||
|
||
|
||
/* relocate against _SDA2_BASE_ */
|
||
case (int)R_PPC_EMB_SDA2REL:
|
||
BFD_ASSERT (sec != (asection *)0);
|
||
if (strcmp (bfd_get_section_name (abfd, sec), ".sdata2") != 0
|
||
&& strcmp (bfd_get_section_name (abfd, sec), ".sbss2") != 0)
|
||
{
|
||
(*_bfd_error_handler) ("%s: The target (%s) of a %s relocation is in the wrong section (%s)",
|
||
bfd_get_filename (input_bfd),
|
||
sym_name,
|
||
ppc_elf_howto_table[ (int)r_type ]->name,
|
||
bfd_get_section_name (abfd, sec));
|
||
|
||
bfd_set_error (bfd_error_bad_value);
|
||
ret = false;
|
||
continue;
|
||
}
|
||
addend -= (sdata2->sym_hash->root.u.def.value
|
||
+ sdata2->sym_hash->root.u.def.section->output_section->vma
|
||
+ sdata2->sym_hash->root.u.def.section->output_offset);
|
||
break;
|
||
|
||
|
||
/* relocate against either _SDA_BASE_, _SDA2_BASE_, or 0 */
|
||
case (int)R_PPC_EMB_SDA21:
|
||
case (int)R_PPC_EMB_RELSDA:
|
||
{
|
||
const char *name = bfd_get_section_name (abfd, sec);
|
||
int reg;
|
||
|
||
BFD_ASSERT (sec != (asection *)0);
|
||
if (strcmp (name, ".sdata") == 0 || strcmp (name, ".sbss") == 0)
|
||
{
|
||
reg = 13;
|
||
addend -= (sdata->sym_hash->root.u.def.value
|
||
+ sdata->sym_hash->root.u.def.section->output_section->vma
|
||
+ sdata->sym_hash->root.u.def.section->output_offset);
|
||
}
|
||
|
||
else if (strcmp (name, ".sdata2") == 0 || strcmp (name, ".sbss2") == 0)
|
||
{
|
||
reg = 2;
|
||
addend -= (sdata2->sym_hash->root.u.def.value
|
||
+ sdata2->sym_hash->root.u.def.section->output_section->vma
|
||
+ sdata2->sym_hash->root.u.def.section->output_offset);
|
||
}
|
||
|
||
else if (strcmp (name, ".PPC.EMB.sdata0") == 0 || strcmp (name, ".PPC.EMB.sbss0") == 0)
|
||
{
|
||
reg = 0;
|
||
}
|
||
|
||
else
|
||
{
|
||
(*_bfd_error_handler) ("%s: The target (%s) of a %s relocation is in the wrong section (%s)",
|
||
bfd_get_filename (input_bfd),
|
||
sym_name,
|
||
ppc_elf_howto_table[ (int)r_type ]->name,
|
||
bfd_get_section_name (abfd, sec));
|
||
|
||
bfd_set_error (bfd_error_bad_value);
|
||
ret = false;
|
||
continue;
|
||
}
|
||
|
||
if (r_type == R_PPC_EMB_SDA21)
|
||
{ /* fill in register field */
|
||
insn = bfd_get_32 (output_bfd, contents + offset);
|
||
insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
|
||
bfd_put_32 (output_bfd, insn, contents + offset);
|
||
}
|
||
}
|
||
break;
|
||
|
||
/* Relocate against the beginning of the section */
|
||
case (int)R_PPC_SECTOFF:
|
||
case (int)R_PPC_SECTOFF_LO:
|
||
case (int)R_PPC_SECTOFF_HI:
|
||
BFD_ASSERT (sec != (asection *)0);
|
||
addend -= sec->output_section->vma;
|
||
break;
|
||
|
||
case (int)R_PPC_SECTOFF_HA:
|
||
BFD_ASSERT (sec != (asection *)0);
|
||
addend -= sec->output_section->vma;
|
||
addend += ((relocation + addend) & 0x8000) << 1;
|
||
break;
|
||
|
||
/* Negative relocations */
|
||
case (int)R_PPC_EMB_NADDR32:
|
||
case (int)R_PPC_EMB_NADDR16:
|
||
case (int)R_PPC_EMB_NADDR16_LO:
|
||
case (int)R_PPC_EMB_NADDR16_HI:
|
||
addend -= 2*relocation;
|
||
break;
|
||
|
||
case (int)R_PPC_EMB_NADDR16_HA:
|
||
addend -= 2*relocation;
|
||
addend += ((relocation + addend) & 0x8000) << 1;
|
||
break;
|
||
|
||
/* NOP relocation that prevents garbage collecting linkers from omitting a
|
||
reference. */
|
||
case (int)R_PPC_EMB_MRKREF:
|
||
continue;
|
||
|
||
case (int)R_PPC_COPY:
|
||
case (int)R_PPC_GLOB_DAT:
|
||
case (int)R_PPC_JMP_SLOT:
|
||
case (int)R_PPC_RELATIVE:
|
||
case (int)R_PPC_PLT32:
|
||
case (int)R_PPC_PLTREL32:
|
||
case (int)R_PPC_PLT16_LO:
|
||
case (int)R_PPC_PLT16_HI:
|
||
case (int)R_PPC_PLT16_HA:
|
||
case (int)R_PPC_EMB_RELSEC16:
|
||
case (int)R_PPC_EMB_RELST_LO:
|
||
case (int)R_PPC_EMB_RELST_HI:
|
||
case (int)R_PPC_EMB_RELST_HA:
|
||
case (int)R_PPC_EMB_BIT_FLD:
|
||
(*_bfd_error_handler) ("%s: Relocation %s is not yet supported for symbol %s.",
|
||
bfd_get_filename (input_bfd),
|
||
ppc_elf_howto_table[ (int)r_type ]->name,
|
||
sym_name);
|
||
|
||
bfd_set_error (bfd_error_invalid_operation);
|
||
ret = false;
|
||
continue;
|
||
}
|
||
|
||
|
||
#ifdef DEBUG
|
||
fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, offset = %ld, addend = %ld\n",
|
||
howto->name,
|
||
(int)r_type,
|
||
sym_name,
|
||
r_symndx,
|
||
(long)offset,
|
||
(long)addend);
|
||
#endif
|
||
|
||
r = _bfd_final_link_relocate (howto,
|
||
input_bfd,
|
||
input_section,
|
||
contents,
|
||
offset,
|
||
relocation,
|
||
addend);
|
||
|
||
if (r != bfd_reloc_ok)
|
||
{
|
||
ret = false;
|
||
switch (r)
|
||
{
|
||
default:
|
||
break;
|
||
|
||
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)
|
||
break;
|
||
|
||
if (*name == '\0')
|
||
name = bfd_section_name (input_bfd, sec);
|
||
}
|
||
|
||
(*info->callbacks->reloc_overflow)(info,
|
||
name,
|
||
howto->name,
|
||
(bfd_vma) 0,
|
||
input_bfd,
|
||
input_section,
|
||
offset);
|
||
}
|
||
break;
|
||
|
||
}
|
||
}
|
||
}
|
||
|
||
|
||
#ifdef DEBUG
|
||
fprintf (stderr, "\n");
|
||
#endif
|
||
|
||
return ret;
|
||
}
|
||
|
||
|
||
#define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
|
||
#define TARGET_LITTLE_NAME "elf32-powerpcle"
|
||
#define TARGET_BIG_SYM bfd_elf32_powerpc_vec
|
||
#define TARGET_BIG_NAME "elf32-powerpc"
|
||
#define ELF_ARCH bfd_arch_powerpc
|
||
#define ELF_MACHINE_CODE EM_PPC
|
||
#define ELF_MAXPAGESIZE 0x10000
|
||
#define elf_info_to_howto ppc_elf_info_to_howto
|
||
|
||
#ifdef EM_CYGNUS_POWERPC
|
||
#define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
|
||
#endif
|
||
|
||
#ifdef EM_PPC_OLD
|
||
#define ELF_MACHINE_ALT2 EM_PPC_OLD
|
||
#endif
|
||
|
||
#define elf_backend_plt_not_loaded 1
|
||
#define elf_backend_got_symbol_offset 4
|
||
|
||
#define bfd_elf32_bfd_copy_private_bfd_data ppc_elf_copy_private_bfd_data
|
||
#define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
|
||
#define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
|
||
#define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
|
||
#define elf_backend_section_from_shdr ppc_elf_section_from_shdr
|
||
#define elf_backend_relocate_section ppc_elf_relocate_section
|
||
#define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
|
||
#define elf_backend_check_relocs ppc_elf_check_relocs
|
||
#define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
|
||
#define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
|
||
#define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
|
||
#define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
|
||
#define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
|
||
#define elf_backend_fake_sections ppc_elf_fake_sections
|
||
#define elf_backend_additional_program_headers ppc_elf_additional_program_headers
|
||
#define elf_backend_modify_segment_map ppc_elf_modify_segment_map
|
||
|
||
#include "elf32-target.h"
|