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2135 lines
68 KiB
C
2135 lines
68 KiB
C
/* SPARC-specific support for 32-bit ELF
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Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001
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Free Software Foundation, Inc.
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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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#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/sparc.h"
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#include "opcode/sparc.h"
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static reloc_howto_type *elf32_sparc_reloc_type_lookup
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PARAMS ((bfd *, bfd_reloc_code_real_type));
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static void elf32_sparc_info_to_howto
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PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
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static boolean elf32_sparc_check_relocs
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PARAMS ((bfd *, struct bfd_link_info *, asection *,
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const Elf_Internal_Rela *));
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static boolean elf32_sparc_adjust_dynamic_symbol
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PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
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static boolean elf32_sparc_size_dynamic_sections
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PARAMS ((bfd *, struct bfd_link_info *));
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static boolean elf32_sparc_relax_section
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PARAMS ((bfd *, asection *, struct bfd_link_info *, boolean *));
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static boolean elf32_sparc_relocate_section
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PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
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Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
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static boolean elf32_sparc_finish_dynamic_symbol
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PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
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Elf_Internal_Sym *));
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static boolean elf32_sparc_finish_dynamic_sections
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PARAMS ((bfd *, struct bfd_link_info *));
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static boolean elf32_sparc_merge_private_bfd_data PARAMS ((bfd *, bfd *));
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static boolean elf32_sparc_object_p
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PARAMS ((bfd *));
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static void elf32_sparc_final_write_processing
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PARAMS ((bfd *, boolean));
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static enum elf_reloc_type_class elf32_sparc_reloc_type_class
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PARAMS ((int));
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static asection * elf32_sparc_gc_mark_hook
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PARAMS ((bfd *, struct bfd_link_info *, Elf_Internal_Rela *,
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struct elf_link_hash_entry *, Elf_Internal_Sym *));
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static boolean elf32_sparc_gc_sweep_hook
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PARAMS ((bfd *, struct bfd_link_info *, asection *,
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const Elf_Internal_Rela *));
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/* The relocation "howto" table. */
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static bfd_reloc_status_type sparc_elf_notsupported_reloc
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PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
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static bfd_reloc_status_type sparc_elf_wdisp16_reloc
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PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
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reloc_howto_type _bfd_sparc_elf_howto_table[] =
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{
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HOWTO(R_SPARC_NONE, 0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_NONE", false,0,0x00000000,true),
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HOWTO(R_SPARC_8, 0,0, 8,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_8", false,0,0x000000ff,true),
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HOWTO(R_SPARC_16, 0,1,16,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_16", false,0,0x0000ffff,true),
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HOWTO(R_SPARC_32, 0,2,32,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_32", false,0,0xffffffff,true),
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HOWTO(R_SPARC_DISP8, 0,0, 8,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_DISP8", false,0,0x000000ff,true),
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HOWTO(R_SPARC_DISP16, 0,1,16,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_DISP16", false,0,0x0000ffff,true),
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HOWTO(R_SPARC_DISP32, 0,2,32,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_DISP32", false,0,0x00ffffff,true),
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HOWTO(R_SPARC_WDISP30, 2,2,30,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_WDISP30", false,0,0x3fffffff,true),
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HOWTO(R_SPARC_WDISP22, 2,2,22,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_WDISP22", false,0,0x003fffff,true),
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HOWTO(R_SPARC_HI22, 10,2,22,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_HI22", false,0,0x003fffff,true),
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HOWTO(R_SPARC_22, 0,2,22,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_22", false,0,0x003fffff,true),
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HOWTO(R_SPARC_13, 0,2,13,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_13", false,0,0x00001fff,true),
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HOWTO(R_SPARC_LO10, 0,2,10,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_LO10", false,0,0x000003ff,true),
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HOWTO(R_SPARC_GOT10, 0,2,10,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_GOT10", false,0,0x000003ff,true),
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HOWTO(R_SPARC_GOT13, 0,2,13,false,0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_GOT13", false,0,0x00001fff,true),
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HOWTO(R_SPARC_GOT22, 10,2,22,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_GOT22", false,0,0x003fffff,true),
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HOWTO(R_SPARC_PC10, 0,2,10,true, 0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_PC10", false,0,0x000003ff,true),
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HOWTO(R_SPARC_PC22, 10,2,22,true, 0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_PC22", false,0,0x003fffff,true),
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HOWTO(R_SPARC_WPLT30, 2,2,30,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_WPLT30", false,0,0x3fffffff,true),
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HOWTO(R_SPARC_COPY, 0,0,00,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_COPY", false,0,0x00000000,true),
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HOWTO(R_SPARC_GLOB_DAT, 0,0,00,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_GLOB_DAT",false,0,0x00000000,true),
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HOWTO(R_SPARC_JMP_SLOT, 0,0,00,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_JMP_SLOT",false,0,0x00000000,true),
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HOWTO(R_SPARC_RELATIVE, 0,0,00,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_RELATIVE",false,0,0x00000000,true),
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HOWTO(R_SPARC_UA32, 0,2,32,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_UA32", false,0,0xffffffff,true),
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HOWTO(R_SPARC_PLT32, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_PLT32", false,0,0x00000000,true),
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HOWTO(R_SPARC_HIPLT22, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_HIPLT22", false,0,0x00000000,true),
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HOWTO(R_SPARC_LOPLT10, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_LOPLT10", false,0,0x00000000,true),
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HOWTO(R_SPARC_PCPLT32, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_PCPLT32", false,0,0x00000000,true),
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HOWTO(R_SPARC_PCPLT22, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_PCPLT22", false,0,0x00000000,true),
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HOWTO(R_SPARC_PCPLT10, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_PCPLT10", false,0,0x00000000,true),
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HOWTO(R_SPARC_10, 0,2,10,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_10", false,0,0x000003ff,true),
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HOWTO(R_SPARC_11, 0,2,11,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_11", false,0,0x000007ff,true),
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/* These are for sparc64 in a 64 bit environment.
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Values need to be here because the table is indexed by reloc number. */
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HOWTO(R_SPARC_64, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_64", false,0,0x00000000,true),
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HOWTO(R_SPARC_OLO10, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_OLO10", false,0,0x00000000,true),
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HOWTO(R_SPARC_HH22, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_HH22", false,0,0x00000000,true),
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HOWTO(R_SPARC_HM10, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_HM10", false,0,0x00000000,true),
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HOWTO(R_SPARC_LM22, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_LM22", false,0,0x00000000,true),
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HOWTO(R_SPARC_PC_HH22, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_PC_HH22", false,0,0x00000000,true),
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HOWTO(R_SPARC_PC_HM10, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_PC_HM10", false,0,0x00000000,true),
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HOWTO(R_SPARC_PC_LM22, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_PC_LM22", false,0,0x00000000,true),
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/* End sparc64 in 64 bit environment values.
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The following are for sparc64 in a 32 bit environment. */
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HOWTO(R_SPARC_WDISP16, 2,2,16,true, 0,complain_overflow_signed, sparc_elf_wdisp16_reloc,"R_SPARC_WDISP16", false,0,0x00000000,true),
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HOWTO(R_SPARC_WDISP19, 2,2,19,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_WDISP19", false,0,0x0007ffff,true),
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HOWTO(R_SPARC_UNUSED_42, 0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_UNUSED_42",false,0,0x00000000,true),
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HOWTO(R_SPARC_7, 0,2, 7,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_7", false,0,0x0000007f,true),
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HOWTO(R_SPARC_5, 0,2, 5,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_5", false,0,0x0000001f,true),
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HOWTO(R_SPARC_6, 0,2, 6,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_6", false,0,0x0000003f,true),
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HOWTO(R_SPARC_NONE, 0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_NONE", false,0,0x00000000,true),
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HOWTO(R_SPARC_NONE, 0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_NONE", false,0,0x00000000,true),
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HOWTO(R_SPARC_NONE, 0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_NONE", false,0,0x00000000,true),
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HOWTO(R_SPARC_NONE, 0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_NONE", false,0,0x00000000,true),
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HOWTO(R_SPARC_NONE, 0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_NONE", false,0,0x00000000,true),
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HOWTO(R_SPARC_NONE, 0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_NONE", false,0,0x00000000,true),
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HOWTO(R_SPARC_NONE, 0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_NONE", false,0,0x00000000,true),
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HOWTO(R_SPARC_NONE, 0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_NONE", false,0,0x00000000,true),
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HOWTO(R_SPARC_UA64, 0,0, 0,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_UA64", false,0,0x00000000,true),
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HOWTO(R_SPARC_UA16, 0,1,16,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_UA16", false,0,0x0000ffff,true),
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HOWTO(R_SPARC_REV32, 0,2,32,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_REV32", false,0,0xffffffff,true),
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};
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static reloc_howto_type elf32_sparc_vtinherit_howto =
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HOWTO (R_SPARC_GNU_VTINHERIT, 0,2,0,false,0,complain_overflow_dont, NULL, "R_SPARC_GNU_VTINHERIT", false,0, 0, false);
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static reloc_howto_type elf32_sparc_vtentry_howto =
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HOWTO (R_SPARC_GNU_VTENTRY, 0,2,0,false,0,complain_overflow_dont, _bfd_elf_rel_vtable_reloc_fn,"R_SPARC_GNU_VTENTRY", false,0,0, false);
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struct elf_reloc_map {
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bfd_reloc_code_real_type bfd_reloc_val;
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unsigned char elf_reloc_val;
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};
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static CONST struct elf_reloc_map sparc_reloc_map[] =
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{
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{ BFD_RELOC_NONE, R_SPARC_NONE, },
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{ BFD_RELOC_16, R_SPARC_16, },
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{ BFD_RELOC_8, R_SPARC_8 },
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{ BFD_RELOC_8_PCREL, R_SPARC_DISP8 },
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{ BFD_RELOC_CTOR, R_SPARC_32 },
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{ BFD_RELOC_32, R_SPARC_32 },
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{ BFD_RELOC_32_PCREL, R_SPARC_DISP32 },
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{ BFD_RELOC_HI22, R_SPARC_HI22 },
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{ BFD_RELOC_LO10, R_SPARC_LO10, },
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{ BFD_RELOC_32_PCREL_S2, R_SPARC_WDISP30 },
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{ BFD_RELOC_SPARC22, R_SPARC_22 },
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{ BFD_RELOC_SPARC13, R_SPARC_13 },
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{ BFD_RELOC_SPARC_GOT10, R_SPARC_GOT10 },
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{ BFD_RELOC_SPARC_GOT13, R_SPARC_GOT13 },
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{ BFD_RELOC_SPARC_GOT22, R_SPARC_GOT22 },
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{ BFD_RELOC_SPARC_PC10, R_SPARC_PC10 },
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{ BFD_RELOC_SPARC_PC22, R_SPARC_PC22 },
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{ BFD_RELOC_SPARC_WPLT30, R_SPARC_WPLT30 },
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{ BFD_RELOC_SPARC_COPY, R_SPARC_COPY },
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{ BFD_RELOC_SPARC_GLOB_DAT, R_SPARC_GLOB_DAT },
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{ BFD_RELOC_SPARC_JMP_SLOT, R_SPARC_JMP_SLOT },
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{ BFD_RELOC_SPARC_RELATIVE, R_SPARC_RELATIVE },
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{ BFD_RELOC_SPARC_WDISP22, R_SPARC_WDISP22 },
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{ BFD_RELOC_SPARC_UA16, R_SPARC_UA16 },
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{ BFD_RELOC_SPARC_UA32, R_SPARC_UA32 },
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{ BFD_RELOC_SPARC_UA64, R_SPARC_UA64 },
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{ BFD_RELOC_SPARC_10, R_SPARC_10 },
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{ BFD_RELOC_SPARC_11, R_SPARC_11 },
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{ BFD_RELOC_SPARC_64, R_SPARC_64 },
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{ BFD_RELOC_SPARC_OLO10, R_SPARC_OLO10 },
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{ BFD_RELOC_SPARC_HH22, R_SPARC_HH22 },
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{ BFD_RELOC_SPARC_HM10, R_SPARC_HM10 },
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{ BFD_RELOC_SPARC_LM22, R_SPARC_LM22 },
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{ BFD_RELOC_SPARC_PC_HH22, R_SPARC_PC_HH22 },
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{ BFD_RELOC_SPARC_PC_HM10, R_SPARC_PC_HM10 },
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{ BFD_RELOC_SPARC_PC_LM22, R_SPARC_PC_LM22 },
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{ BFD_RELOC_SPARC_WDISP16, R_SPARC_WDISP16 },
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{ BFD_RELOC_SPARC_WDISP19, R_SPARC_WDISP19 },
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{ BFD_RELOC_SPARC_7, R_SPARC_7 },
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{ BFD_RELOC_SPARC_5, R_SPARC_5 },
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{ BFD_RELOC_SPARC_6, R_SPARC_6 },
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{ BFD_RELOC_SPARC_REV32, R_SPARC_REV32 },
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{ BFD_RELOC_VTABLE_INHERIT, R_SPARC_GNU_VTINHERIT },
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{ BFD_RELOC_VTABLE_ENTRY, R_SPARC_GNU_VTENTRY },
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};
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static reloc_howto_type *
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elf32_sparc_reloc_type_lookup (abfd, code)
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bfd *abfd ATTRIBUTE_UNUSED;
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bfd_reloc_code_real_type code;
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{
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unsigned int i;
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switch (code)
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{
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case BFD_RELOC_VTABLE_INHERIT:
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return &elf32_sparc_vtinherit_howto;
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case BFD_RELOC_VTABLE_ENTRY:
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return &elf32_sparc_vtentry_howto;
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default:
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for (i = 0; i < sizeof (sparc_reloc_map) / sizeof (struct elf_reloc_map); i++)
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{
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if (sparc_reloc_map[i].bfd_reloc_val == code)
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return &_bfd_sparc_elf_howto_table[(int) sparc_reloc_map[i].elf_reloc_val];
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}
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}
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bfd_set_error (bfd_error_bad_value);
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return NULL;
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}
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/* We need to use ELF32_R_TYPE so we have our own copy of this function,
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and elf64-sparc.c has its own copy. */
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static void
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elf32_sparc_info_to_howto (abfd, cache_ptr, dst)
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bfd *abfd ATTRIBUTE_UNUSED;
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arelent *cache_ptr;
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Elf_Internal_Rela *dst;
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{
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switch (ELF32_R_TYPE(dst->r_info))
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{
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case R_SPARC_GNU_VTINHERIT:
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cache_ptr->howto = &elf32_sparc_vtinherit_howto;
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break;
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case R_SPARC_GNU_VTENTRY:
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cache_ptr->howto = &elf32_sparc_vtentry_howto;
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break;
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default:
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BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_SPARC_max_std);
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cache_ptr->howto = &_bfd_sparc_elf_howto_table[ELF32_R_TYPE(dst->r_info)];
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}
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}
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/* For unsupported relocs. */
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|
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static bfd_reloc_status_type
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sparc_elf_notsupported_reloc (abfd,
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reloc_entry,
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symbol,
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data,
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input_section,
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output_bfd,
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error_message)
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bfd *abfd ATTRIBUTE_UNUSED;
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arelent *reloc_entry ATTRIBUTE_UNUSED;
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asymbol *symbol ATTRIBUTE_UNUSED;
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PTR data ATTRIBUTE_UNUSED;
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asection *input_section ATTRIBUTE_UNUSED;
|
||
bfd *output_bfd ATTRIBUTE_UNUSED;
|
||
char **error_message ATTRIBUTE_UNUSED;
|
||
{
|
||
return bfd_reloc_notsupported;
|
||
}
|
||
|
||
/* Handle the WDISP16 reloc. */
|
||
|
||
static bfd_reloc_status_type
|
||
sparc_elf_wdisp16_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 ATTRIBUTE_UNUSED;
|
||
{
|
||
bfd_vma relocation;
|
||
bfd_vma x;
|
||
|
||
if (output_bfd != (bfd *) NULL
|
||
&& (symbol->flags & BSF_SECTION_SYM) == 0
|
||
&& (! reloc_entry->howto->partial_inplace
|
||
|| reloc_entry->addend == 0))
|
||
{
|
||
reloc_entry->address += input_section->output_offset;
|
||
return bfd_reloc_ok;
|
||
}
|
||
|
||
if (output_bfd != NULL)
|
||
return bfd_reloc_continue;
|
||
|
||
if (reloc_entry->address > input_section->_cooked_size)
|
||
return bfd_reloc_outofrange;
|
||
|
||
relocation = (symbol->value
|
||
+ symbol->section->output_section->vma
|
||
+ symbol->section->output_offset);
|
||
relocation += reloc_entry->addend;
|
||
relocation -= (input_section->output_section->vma
|
||
+ input_section->output_offset);
|
||
relocation -= reloc_entry->address;
|
||
|
||
x = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
|
||
x |= ((((relocation >> 2) & 0xc000) << 6)
|
||
| ((relocation >> 2) & 0x3fff));
|
||
bfd_put_32 (abfd, x, (bfd_byte *) data + reloc_entry->address);
|
||
|
||
if ((bfd_signed_vma) relocation < - 0x40000
|
||
|| (bfd_signed_vma) relocation > 0x3ffff)
|
||
return bfd_reloc_overflow;
|
||
else
|
||
return bfd_reloc_ok;
|
||
}
|
||
|
||
/* Functions for the SPARC ELF linker. */
|
||
|
||
/* The name of the dynamic interpreter. This is put in the .interp
|
||
section. */
|
||
|
||
#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
|
||
|
||
/* The nop opcode we use. */
|
||
|
||
#define SPARC_NOP 0x01000000
|
||
|
||
/* The size in bytes of an entry in the procedure linkage table. */
|
||
|
||
#define PLT_ENTRY_SIZE 12
|
||
|
||
/* The first four entries in a procedure linkage table are reserved,
|
||
and the initial contents are unimportant (we zero them out).
|
||
Subsequent entries look like this. See the SVR4 ABI SPARC
|
||
supplement to see how this works. */
|
||
|
||
/* sethi %hi(.-.plt0),%g1. We fill in the address later. */
|
||
#define PLT_ENTRY_WORD0 0x03000000
|
||
/* b,a .plt0. We fill in the offset later. */
|
||
#define PLT_ENTRY_WORD1 0x30800000
|
||
/* nop. */
|
||
#define PLT_ENTRY_WORD2 SPARC_NOP
|
||
|
||
/* 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
|
||
elf32_sparc_check_relocs (abfd, info, sec, relocs)
|
||
bfd *abfd;
|
||
struct bfd_link_info *info;
|
||
asection *sec;
|
||
const Elf_Internal_Rela *relocs;
|
||
{
|
||
bfd *dynobj;
|
||
Elf_Internal_Shdr *symtab_hdr;
|
||
struct elf_link_hash_entry **sym_hashes;
|
||
bfd_vma *local_got_offsets;
|
||
const Elf_Internal_Rela *rel;
|
||
const Elf_Internal_Rela *rel_end;
|
||
asection *sgot;
|
||
asection *srelgot;
|
||
asection *sreloc;
|
||
|
||
if (info->relocateable)
|
||
return true;
|
||
|
||
dynobj = elf_hash_table (info)->dynobj;
|
||
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
||
sym_hashes = elf_sym_hashes (abfd);
|
||
local_got_offsets = elf_local_got_offsets (abfd);
|
||
|
||
sgot = NULL;
|
||
srelgot = 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))
|
||
{
|
||
case R_SPARC_GOT10:
|
||
case R_SPARC_GOT13:
|
||
case R_SPARC_GOT22:
|
||
/* This symbol requires a global offset table entry. */
|
||
|
||
if (dynobj == NULL)
|
||
{
|
||
/* Create the .got section. */
|
||
elf_hash_table (info)->dynobj = dynobj = abfd;
|
||
if (! _bfd_elf_create_got_section (dynobj, info))
|
||
return false;
|
||
}
|
||
|
||
if (sgot == NULL)
|
||
{
|
||
sgot = bfd_get_section_by_name (dynobj, ".got");
|
||
BFD_ASSERT (sgot != NULL);
|
||
}
|
||
|
||
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_SPARC_RELATIVE reloc so that the
|
||
dynamic linker can adjust this GOT entry. */
|
||
srelgot->_raw_size += sizeof (Elf32_External_Rela);
|
||
}
|
||
}
|
||
|
||
sgot->_raw_size += 4;
|
||
|
||
/* If the .got section is more than 0x1000 bytes, we add
|
||
0x1000 to the value of _GLOBAL_OFFSET_TABLE_, so that 13
|
||
bit relocations have a greater chance of working. */
|
||
if (sgot->_raw_size >= 0x1000
|
||
&& elf_hash_table (info)->hgot->root.u.def.value == 0)
|
||
elf_hash_table (info)->hgot->root.u.def.value = 0x1000;
|
||
|
||
break;
|
||
|
||
case R_SPARC_WPLT30:
|
||
/* 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)
|
||
{
|
||
/* The Solaris native assembler will generate a WPLT30
|
||
reloc for a local symbol if you assemble a call from
|
||
one section to another when using -K pic. We treat
|
||
it as WDISP30. */
|
||
break;
|
||
}
|
||
|
||
/* 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;
|
||
}
|
||
|
||
h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
|
||
|
||
break;
|
||
|
||
case R_SPARC_PC10:
|
||
case R_SPARC_PC22:
|
||
if (h != NULL)
|
||
h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
|
||
|
||
if (h != NULL
|
||
&& strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
|
||
break;
|
||
/* Fall through. */
|
||
case R_SPARC_DISP8:
|
||
case R_SPARC_DISP16:
|
||
case R_SPARC_DISP32:
|
||
case R_SPARC_WDISP30:
|
||
case R_SPARC_WDISP22:
|
||
case R_SPARC_WDISP19:
|
||
case R_SPARC_WDISP16:
|
||
if (h != NULL)
|
||
h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
|
||
|
||
/* If we are linking with -Bsymbolic, we do not need to copy
|
||
a PC relative reloc against a global symbol which is
|
||
defined in an object we are including in the link (i.e.,
|
||
DEF_REGULAR is set). FIXME: At this point we have not
|
||
seen all the input files, so it is possible that
|
||
DEF_REGULAR is not set now but will be set later (it is
|
||
never cleared). This needs to be handled as in
|
||
elf32-i386.c. */
|
||
if (h == NULL
|
||
|| (info->symbolic
|
||
&& (h->elf_link_hash_flags
|
||
& ELF_LINK_HASH_DEF_REGULAR) != 0))
|
||
break;
|
||
/* Fall through. */
|
||
case R_SPARC_8:
|
||
case R_SPARC_16:
|
||
case R_SPARC_32:
|
||
case R_SPARC_HI22:
|
||
case R_SPARC_22:
|
||
case R_SPARC_13:
|
||
case R_SPARC_LO10:
|
||
case R_SPARC_UA16:
|
||
case R_SPARC_UA32:
|
||
if (h != NULL)
|
||
h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
|
||
|
||
if (info->shared && (sec->flags & SEC_ALLOC))
|
||
{
|
||
/* 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. */
|
||
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)
|
||
return false;
|
||
|
||
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)
|
||
{
|
||
flagword flags;
|
||
|
||
sreloc = bfd_make_section (dynobj, name);
|
||
flags = (SEC_HAS_CONTENTS | SEC_READONLY
|
||
| SEC_IN_MEMORY | SEC_LINKER_CREATED);
|
||
if ((sec->flags & SEC_ALLOC) != 0)
|
||
flags |= SEC_ALLOC | SEC_LOAD;
|
||
if (sreloc == NULL
|
||
|| ! bfd_set_section_flags (dynobj, sreloc, flags)
|
||
|| ! bfd_set_section_alignment (dynobj, sreloc, 2))
|
||
return false;
|
||
}
|
||
if (sec->flags & SEC_READONLY)
|
||
info->flags |= DF_TEXTREL;
|
||
}
|
||
|
||
sreloc->_raw_size += sizeof (Elf32_External_Rela);
|
||
}
|
||
|
||
break;
|
||
|
||
case R_SPARC_GNU_VTINHERIT:
|
||
if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
|
||
return false;
|
||
break;
|
||
|
||
case R_SPARC_GNU_VTENTRY:
|
||
if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend))
|
||
return false;
|
||
break;
|
||
|
||
default:
|
||
break;
|
||
}
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
static asection *
|
||
elf32_sparc_gc_mark_hook (abfd, info, rel, h, sym)
|
||
bfd *abfd;
|
||
struct bfd_link_info *info ATTRIBUTE_UNUSED;
|
||
Elf_Internal_Rela *rel;
|
||
struct elf_link_hash_entry *h;
|
||
Elf_Internal_Sym *sym;
|
||
{
|
||
|
||
if (h != NULL)
|
||
{
|
||
switch (ELF32_R_TYPE (rel->r_info))
|
||
{
|
||
case R_SPARC_GNU_VTINHERIT:
|
||
case R_SPARC_GNU_VTENTRY:
|
||
break;
|
||
|
||
default:
|
||
switch (h->root.type)
|
||
{
|
||
case bfd_link_hash_defined:
|
||
case bfd_link_hash_defweak:
|
||
return h->root.u.def.section;
|
||
|
||
case bfd_link_hash_common:
|
||
return h->root.u.c.p->section;
|
||
|
||
default:
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
else
|
||
{
|
||
if (!(elf_bad_symtab (abfd)
|
||
&& ELF_ST_BIND (sym->st_info) != STB_LOCAL)
|
||
&& ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE)
|
||
&& sym->st_shndx != SHN_COMMON))
|
||
{
|
||
return bfd_section_from_elf_index (abfd, sym->st_shndx);
|
||
}
|
||
}
|
||
|
||
return NULL;
|
||
}
|
||
|
||
/* Update the got entry reference counts for the section being removed. */
|
||
static boolean
|
||
elf32_sparc_gc_sweep_hook (abfd, info, sec, relocs)
|
||
bfd *abfd;
|
||
struct bfd_link_info *info ATTRIBUTE_UNUSED;
|
||
asection *sec;
|
||
const Elf_Internal_Rela *relocs;
|
||
{
|
||
|
||
Elf_Internal_Shdr *symtab_hdr;
|
||
struct elf_link_hash_entry **sym_hashes;
|
||
bfd_signed_vma *local_got_refcounts;
|
||
const Elf_Internal_Rela *rel, *relend;
|
||
unsigned long r_symndx;
|
||
struct elf_link_hash_entry *h;
|
||
|
||
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
||
sym_hashes = elf_sym_hashes (abfd);
|
||
local_got_refcounts = elf_local_got_refcounts (abfd);
|
||
|
||
relend = relocs + sec->reloc_count;
|
||
for (rel = relocs; rel < relend; rel++)
|
||
switch (ELF32_R_TYPE (rel->r_info))
|
||
{
|
||
case R_SPARC_GOT10:
|
||
case R_SPARC_GOT13:
|
||
case R_SPARC_GOT22:
|
||
r_symndx = ELF32_R_SYM (rel->r_info);
|
||
if (r_symndx >= symtab_hdr->sh_info)
|
||
{
|
||
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
||
if (h->got.refcount > 0)
|
||
h->got.refcount--;
|
||
}
|
||
else
|
||
{
|
||
if (local_got_refcounts[r_symndx] > 0)
|
||
local_got_refcounts[r_symndx]--;
|
||
}
|
||
break;
|
||
|
||
case R_SPARC_PLT32:
|
||
case R_SPARC_HIPLT22:
|
||
case R_SPARC_LOPLT10:
|
||
case R_SPARC_PCPLT32:
|
||
case R_SPARC_PCPLT10:
|
||
r_symndx = ELF32_R_SYM (rel->r_info);
|
||
if (r_symndx >= symtab_hdr->sh_info)
|
||
{
|
||
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
||
if (h->plt.refcount > 0)
|
||
h->plt.refcount--;
|
||
}
|
||
break;
|
||
|
||
default:
|
||
break;
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Adjust a symbol defined by a dynamic object and referenced by a
|
||
regular object. The current definition is in some section of the
|
||
dynamic object, but we're not including those sections. We have to
|
||
change the definition to something the rest of the link can
|
||
understand. */
|
||
|
||
static boolean
|
||
elf32_sparc_adjust_dynamic_symbol (info, h)
|
||
struct bfd_link_info *info;
|
||
struct elf_link_hash_entry *h;
|
||
{
|
||
bfd *dynobj;
|
||
asection *s;
|
||
unsigned int power_of_two;
|
||
|
||
dynobj = elf_hash_table (info)->dynobj;
|
||
|
||
/* Make sure we know what is going on here. */
|
||
BFD_ASSERT (dynobj != NULL
|
||
&& ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT)
|
||
|| h->weakdef != NULL
|
||
|| ((h->elf_link_hash_flags
|
||
& ELF_LINK_HASH_DEF_DYNAMIC) != 0
|
||
&& (h->elf_link_hash_flags
|
||
& ELF_LINK_HASH_REF_REGULAR) != 0
|
||
&& (h->elf_link_hash_flags
|
||
& ELF_LINK_HASH_DEF_REGULAR) == 0)));
|
||
|
||
/* If this is a function, put it in the procedure linkage table. We
|
||
will fill in the contents of the procedure linkage table later
|
||
(although we could actually do it here). The STT_NOTYPE
|
||
condition is a hack specifically for the Oracle libraries
|
||
delivered for Solaris; for some inexplicable reason, they define
|
||
some of their functions as STT_NOTYPE when they really should be
|
||
STT_FUNC. */
|
||
if (h->type == STT_FUNC
|
||
|| (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0
|
||
|| (h->type == STT_NOTYPE
|
||
&& (h->root.type == bfd_link_hash_defined
|
||
|| h->root.type == bfd_link_hash_defweak)
|
||
&& (h->root.u.def.section->flags & SEC_CODE) != 0))
|
||
{
|
||
if (! elf_hash_table (info)->dynamic_sections_created
|
||
|| ((!info->shared || info->symbolic || h->dynindx == -1)
|
||
&& (h->elf_link_hash_flags
|
||
& ELF_LINK_HASH_DEF_REGULAR) != 0))
|
||
{
|
||
/* This case can occur if we saw a WPLT30 reloc in an input
|
||
file, but none of the input files were dynamic objects.
|
||
Or, when linking the main application or a -Bsymbolic
|
||
shared library against PIC code. Or when a global symbol
|
||
has been made private, e.g. via versioning.
|
||
|
||
In these cases we know what value the symbol will resolve
|
||
to, so we don't actually need to build a procedure linkage
|
||
table, and we can just do a WDISP30 reloc instead. */
|
||
|
||
h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
|
||
return true;
|
||
}
|
||
|
||
s = bfd_get_section_by_name (dynobj, ".plt");
|
||
BFD_ASSERT (s != NULL);
|
||
|
||
/* The first four entries in .plt are reserved. */
|
||
if (s->_raw_size == 0)
|
||
s->_raw_size = 4 * PLT_ENTRY_SIZE;
|
||
|
||
/* The procedure linkage table has a maximum size. */
|
||
if (s->_raw_size >= 0x400000)
|
||
{
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return false;
|
||
}
|
||
|
||
/* 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 = s->_raw_size;
|
||
}
|
||
|
||
h->plt.offset = s->_raw_size;
|
||
|
||
/* 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;
|
||
|
||
/* If there are no references to this symbol that do not use the
|
||
GOT, we don't need to generate a copy reloc. */
|
||
if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
|
||
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_SPARC_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
|
||
.rel.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;
|
||
}
|
||
|
||
/* Set the sizes of the dynamic sections. */
|
||
|
||
static boolean
|
||
elf32_sparc_size_dynamic_sections (output_bfd, info)
|
||
bfd *output_bfd ATTRIBUTE_UNUSED;
|
||
struct bfd_link_info *info;
|
||
{
|
||
bfd *dynobj;
|
||
asection *s;
|
||
boolean relplt;
|
||
|
||
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;
|
||
}
|
||
|
||
/* Make space for the trailing nop in .plt. */
|
||
s = bfd_get_section_by_name (dynobj, ".plt");
|
||
BFD_ASSERT (s != NULL);
|
||
if (s->_raw_size > 0)
|
||
s->_raw_size += 4;
|
||
}
|
||
else
|
||
{
|
||
/* We may have created entries in the .rela.got section.
|
||
However, if we are not creating the dynamic sections, we will
|
||
not actually use these entries. Reset the size of .rela.got,
|
||
which will cause it to get stripped from the output file
|
||
below. */
|
||
s = bfd_get_section_by_name (dynobj, ".rela.got");
|
||
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. */
|
||
relplt = 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 (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 to handle .rela.bss and
|
||
.rel.plt. We must create it in
|
||
create_dynamic_sections, because it 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
|
||
{
|
||
if (strcmp (name, ".rela.plt") == 0)
|
||
relplt = 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, ".plt") != 0
|
||
&& strcmp (name, ".got") != 0)
|
||
{
|
||
/* It's not one of our sections, so don't allocate space. */
|
||
continue;
|
||
}
|
||
|
||
if (strip)
|
||
{
|
||
_bfd_strip_section_from_output (info, s);
|
||
continue;
|
||
}
|
||
|
||
/* Allocate memory for the section contents. */
|
||
/* FIXME: This should be a call to bfd_alloc not bfd_zalloc.
|
||
Unused entries should be reclaimed before the section's contents
|
||
are written out, but at the moment this does not happen. Thus in
|
||
order to prevent writing out garbage, we initialise the section's
|
||
contents to zero. */
|
||
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 elf32_sparc_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 (relplt)
|
||
{
|
||
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 (! 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 (info->flags & DF_TEXTREL)
|
||
{
|
||
if (! bfd_elf32_add_dynamic_entry (info, DT_TEXTREL, 0))
|
||
return false;
|
||
}
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
#define SET_SEC_DO_RELAX(section) do { elf_section_data(section)->tdata = (void *)1; } while (0)
|
||
#define SEC_DO_RELAX(section) (elf_section_data(section)->tdata == (void *)1)
|
||
|
||
static boolean
|
||
elf32_sparc_relax_section (abfd, section, link_info, again)
|
||
bfd *abfd ATTRIBUTE_UNUSED;
|
||
asection *section ATTRIBUTE_UNUSED;
|
||
struct bfd_link_info *link_info ATTRIBUTE_UNUSED;
|
||
boolean *again;
|
||
{
|
||
*again = false;
|
||
SET_SEC_DO_RELAX (section);
|
||
return true;
|
||
}
|
||
|
||
/* Relocate a SPARC ELF section. */
|
||
|
||
static boolean
|
||
elf32_sparc_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;
|
||
{
|
||
bfd *dynobj;
|
||
Elf_Internal_Shdr *symtab_hdr;
|
||
struct elf_link_hash_entry **sym_hashes;
|
||
bfd_vma *local_got_offsets;
|
||
bfd_vma got_base;
|
||
asection *sgot;
|
||
asection *splt;
|
||
asection *sreloc;
|
||
Elf_Internal_Rela *rel;
|
||
Elf_Internal_Rela *relend;
|
||
|
||
dynobj = elf_hash_table (info)->dynobj;
|
||
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
|
||
sym_hashes = elf_sym_hashes (input_bfd);
|
||
local_got_offsets = elf_local_got_offsets (input_bfd);
|
||
|
||
if (elf_hash_table (info)->hgot == NULL)
|
||
got_base = 0;
|
||
else
|
||
got_base = elf_hash_table (info)->hgot->root.u.def.value;
|
||
|
||
sgot = NULL;
|
||
splt = NULL;
|
||
sreloc = NULL;
|
||
|
||
rel = relocs;
|
||
relend = relocs + input_section->reloc_count;
|
||
for (; rel < relend; rel++)
|
||
{
|
||
int r_type;
|
||
reloc_howto_type *howto;
|
||
unsigned long r_symndx;
|
||
struct elf_link_hash_entry *h;
|
||
Elf_Internal_Sym *sym;
|
||
asection *sec;
|
||
bfd_vma relocation;
|
||
bfd_reloc_status_type r;
|
||
|
||
r_type = ELF32_R_TYPE (rel->r_info);
|
||
|
||
if (r_type == R_SPARC_GNU_VTINHERIT
|
||
|| r_type == R_SPARC_GNU_VTENTRY)
|
||
continue;
|
||
|
||
if (r_type < 0 || r_type >= (int) R_SPARC_max_std)
|
||
{
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return false;
|
||
}
|
||
howto = _bfd_sparc_elf_howto_table + 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 (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
|
||
{
|
||
sec = local_sections[r_symndx];
|
||
rel->r_addend += sec->output_offset + sym->st_value;
|
||
}
|
||
}
|
||
|
||
continue;
|
||
}
|
||
|
||
/* This is a final link. */
|
||
h = NULL;
|
||
sym = NULL;
|
||
sec = NULL;
|
||
if (r_symndx < symtab_hdr->sh_info)
|
||
{
|
||
sym = local_syms + r_symndx;
|
||
sec = local_sections[r_symndx];
|
||
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;
|
||
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_SPARC_WPLT30
|
||
&& h->plt.offset != (bfd_vma) -1)
|
||
|| ((r_type == R_SPARC_GOT10
|
||
|| r_type == R_SPARC_GOT13
|
||
|| r_type == R_SPARC_GOT22)
|
||
&& elf_hash_table (info)->dynamic_sections_created
|
||
&& (! info->shared
|
||
|| (! info->symbolic && h->dynindx != -1)
|
||
|| (h->elf_link_hash_flags
|
||
& ELF_LINK_HASH_DEF_REGULAR) == 0))
|
||
|| (info->shared
|
||
&& ((! info->symbolic && h->dynindx != -1)
|
||
|| (h->elf_link_hash_flags
|
||
& ELF_LINK_HASH_DEF_REGULAR) == 0)
|
||
&& (r_type == R_SPARC_8
|
||
|| r_type == R_SPARC_16
|
||
|| r_type == R_SPARC_32
|
||
|| r_type == R_SPARC_DISP8
|
||
|| r_type == R_SPARC_DISP16
|
||
|| r_type == R_SPARC_DISP32
|
||
|| r_type == R_SPARC_WDISP30
|
||
|| r_type == R_SPARC_WDISP22
|
||
|| r_type == R_SPARC_WDISP19
|
||
|| r_type == R_SPARC_WDISP16
|
||
|| r_type == R_SPARC_HI22
|
||
|| r_type == R_SPARC_22
|
||
|| r_type == R_SPARC_13
|
||
|| r_type == R_SPARC_LO10
|
||
|| r_type == R_SPARC_UA16
|
||
|| r_type == R_SPARC_UA32
|
||
|| ((r_type == R_SPARC_PC10
|
||
|| r_type == R_SPARC_PC22)
|
||
&& 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 && !info->symbolic
|
||
&& !info->no_undefined
|
||
&& ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
|
||
relocation = 0;
|
||
else
|
||
{
|
||
if (! ((*info->callbacks->undefined_symbol)
|
||
(info, h->root.root.string, input_bfd,
|
||
input_section, rel->r_offset,
|
||
(!info->shared || info->no_undefined
|
||
|| ELF_ST_VISIBILITY (h->other)))))
|
||
return false;
|
||
relocation = 0;
|
||
}
|
||
}
|
||
|
||
switch (r_type)
|
||
{
|
||
case R_SPARC_GOT10:
|
||
case R_SPARC_GOT13:
|
||
case R_SPARC_GOT22:
|
||
/* 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->dynindx == -1)
|
||
&& (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, or the symbol was forced to be local
|
||
because of a version file. 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,
|
||
sgot->contents + off);
|
||
h->got.offset |= 1;
|
||
}
|
||
}
|
||
|
||
relocation = sgot->output_offset + off - got_base;
|
||
}
|
||
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_SPARC_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_SPARC_RELATIVE);
|
||
outrel.r_addend = 0;
|
||
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 - got_base;
|
||
}
|
||
|
||
break;
|
||
|
||
case R_SPARC_WPLT30:
|
||
/* Relocation is to the entry for this symbol in the
|
||
procedure linkage table. */
|
||
|
||
/* The Solaris native assembler will generate a WPLT30 reloc
|
||
for a local symbol if you assemble a call from one
|
||
section to another when using -K pic. We treat it as
|
||
WDISP30. */
|
||
if (h == NULL)
|
||
break;
|
||
|
||
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;
|
||
|
||
case R_SPARC_PC10:
|
||
case R_SPARC_PC22:
|
||
if (h != NULL
|
||
&& strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
|
||
break;
|
||
/* Fall through. */
|
||
case R_SPARC_DISP8:
|
||
case R_SPARC_DISP16:
|
||
case R_SPARC_DISP32:
|
||
case R_SPARC_WDISP30:
|
||
case R_SPARC_WDISP22:
|
||
case R_SPARC_WDISP19:
|
||
case R_SPARC_WDISP16:
|
||
if (h == NULL
|
||
|| (info->symbolic
|
||
&& (h->elf_link_hash_flags
|
||
& ELF_LINK_HASH_DEF_REGULAR) != 0))
|
||
break;
|
||
/* Fall through. */
|
||
case R_SPARC_8:
|
||
case R_SPARC_16:
|
||
case R_SPARC_32:
|
||
case R_SPARC_HI22:
|
||
case R_SPARC_22:
|
||
case R_SPARC_13:
|
||
case R_SPARC_LO10:
|
||
case R_SPARC_UA16:
|
||
case R_SPARC_UA32:
|
||
if (info->shared && (input_section->flags & SEC_ALLOC))
|
||
{
|
||
Elf_Internal_Rela outrel;
|
||
boolean skip;
|
||
|
||
/* 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);
|
||
|
||
/* Optimize unaligned reloc usage now that we know where
|
||
it finally resides. */
|
||
switch (r_type)
|
||
{
|
||
case R_SPARC_16:
|
||
if (outrel.r_offset & 1)
|
||
r_type = R_SPARC_UA16;
|
||
break;
|
||
case R_SPARC_UA16:
|
||
if (!(outrel.r_offset & 1))
|
||
r_type = R_SPARC_16;
|
||
break;
|
||
case R_SPARC_32:
|
||
if (outrel.r_offset & 3)
|
||
r_type = R_SPARC_UA32;
|
||
break;
|
||
case R_SPARC_UA32:
|
||
if (!(outrel.r_offset & 3))
|
||
r_type = R_SPARC_32;
|
||
break;
|
||
}
|
||
|
||
if (skip)
|
||
memset (&outrel, 0, sizeof outrel);
|
||
/* h->dynindx may be -1 if the 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_SPARC_32)
|
||
{
|
||
outrel.r_info = ELF32_R_INFO (0, R_SPARC_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;
|
||
|
||
/* FIXME: we really should be able to link non-pic
|
||
shared libraries. */
|
||
if (indx == 0)
|
||
{
|
||
BFD_FAIL ();
|
||
(*_bfd_error_handler)
|
||
(_("%s: probably compiled without -fPIC?"),
|
||
bfd_get_filename (input_bfd));
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return false;
|
||
}
|
||
}
|
||
|
||
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. */
|
||
continue;
|
||
}
|
||
break;
|
||
|
||
default:
|
||
break;
|
||
}
|
||
|
||
r = bfd_reloc_continue;
|
||
if (r_type == R_SPARC_WDISP16)
|
||
{
|
||
bfd_vma x;
|
||
|
||
relocation += rel->r_addend;
|
||
relocation -= (input_section->output_section->vma
|
||
+ input_section->output_offset);
|
||
relocation -= rel->r_offset;
|
||
|
||
x = bfd_get_32 (input_bfd, contents + rel->r_offset);
|
||
x |= ((((relocation >> 2) & 0xc000) << 6)
|
||
| ((relocation >> 2) & 0x3fff));
|
||
bfd_put_32 (input_bfd, x, contents + rel->r_offset);
|
||
|
||
if ((bfd_signed_vma) relocation < - 0x40000
|
||
|| (bfd_signed_vma) relocation > 0x3ffff)
|
||
r = bfd_reloc_overflow;
|
||
else
|
||
r = bfd_reloc_ok;
|
||
}
|
||
else if (r_type == R_SPARC_REV32)
|
||
{
|
||
bfd_vma x;
|
||
|
||
relocation = relocation + rel->r_addend;
|
||
|
||
x = bfd_get_32 (input_bfd, contents + rel->r_offset);
|
||
x = x + relocation;
|
||
bfd_putl32 (/*input_bfd,*/ x, contents + rel->r_offset);
|
||
r = bfd_reloc_ok;
|
||
}
|
||
else if ((r_type == R_SPARC_WDISP30 || r_type == R_SPARC_WPLT30)
|
||
&& SEC_DO_RELAX (input_section)
|
||
&& rel->r_offset + 4 < input_section->_raw_size)
|
||
{
|
||
#define G0 0
|
||
#define O7 15
|
||
#define XCC (2 << 20)
|
||
#define COND(x) (((x)&0xf)<<25)
|
||
#define CONDA COND(0x8)
|
||
#define INSN_BPA (F2(0,1) | CONDA | BPRED | XCC)
|
||
#define INSN_BA (F2(0,2) | CONDA)
|
||
#define INSN_OR F3(2, 0x2, 0)
|
||
#define INSN_NOP F2(0,4)
|
||
|
||
bfd_vma x, y;
|
||
|
||
/* If the instruction is a call with either:
|
||
restore
|
||
arithmetic instruction with rd == %o7
|
||
where rs1 != %o7 and rs2 if it is register != %o7
|
||
then we can optimize if the call destination is near
|
||
by changing the call into a branch always. */
|
||
x = bfd_get_32 (input_bfd, contents + rel->r_offset);
|
||
y = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
|
||
if ((x & OP(~0)) == OP(1) && (y & OP(~0)) == OP(2))
|
||
{
|
||
if (((y & OP3(~0)) == OP3(0x3d) /* restore */
|
||
|| ((y & OP3(0x28)) == 0 /* arithmetic */
|
||
&& (y & RD(~0)) == RD(O7)))
|
||
&& (y & RS1(~0)) != RS1(O7)
|
||
&& ((y & F3I(~0))
|
||
|| (y & RS2(~0)) != RS2(O7)))
|
||
{
|
||
bfd_vma reloc;
|
||
|
||
reloc = relocation + rel->r_addend - rel->r_offset;
|
||
reloc -= (input_section->output_section->vma
|
||
+ input_section->output_offset);
|
||
|
||
/* Ensure the reloc fits into simm22. */
|
||
if ((reloc & 3) == 0
|
||
&& ((reloc & ~(bfd_vma)0x7fffff) == 0
|
||
|| ((reloc | 0x7fffff) == ~(bfd_vma)0)))
|
||
{
|
||
reloc >>= 2;
|
||
|
||
/* Check whether it fits into simm19 on v9. */
|
||
if (((reloc & 0x3c0000) == 0
|
||
|| (reloc & 0x3c0000) == 0x3c0000)
|
||
&& (elf_elfheader (output_bfd)->e_flags & EF_SPARC_32PLUS))
|
||
x = INSN_BPA | (reloc & 0x7ffff); /* ba,pt %xcc */
|
||
else
|
||
x = INSN_BA | (reloc & 0x3fffff); /* ba */
|
||
bfd_put_32 (input_bfd, x, contents + rel->r_offset);
|
||
r = bfd_reloc_ok;
|
||
if (rel->r_offset >= 4
|
||
&& (y & (0xffffffff ^ RS1(~0)))
|
||
== (INSN_OR | RD(O7) | RS2(G0)))
|
||
{
|
||
bfd_vma z;
|
||
unsigned int reg;
|
||
|
||
z = bfd_get_32 (input_bfd,
|
||
contents + rel->r_offset - 4);
|
||
if ((z & (0xffffffff ^ RD(~0)))
|
||
!= (INSN_OR | RS1(O7) | RS2(G0)))
|
||
break;
|
||
|
||
/* The sequence was
|
||
or %o7, %g0, %rN
|
||
call foo
|
||
or %rN, %g0, %o7
|
||
|
||
If call foo was replaced with ba, replace
|
||
or %rN, %g0, %o7 with nop. */
|
||
|
||
reg = (y & RS1(~0)) >> 14;
|
||
if (reg != ((z & RD(~0)) >> 25)
|
||
|| reg == G0 || reg == O7)
|
||
break;
|
||
|
||
bfd_put_32 (input_bfd, INSN_NOP,
|
||
contents + rel->r_offset + 4);
|
||
}
|
||
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
if (r == bfd_reloc_continue)
|
||
r = _bfd_final_link_relocate (howto, input_bfd, input_section,
|
||
contents, rel->r_offset,
|
||
relocation, rel->r_addend);
|
||
|
||
if (r != bfd_reloc_ok)
|
||
{
|
||
switch (r)
|
||
{
|
||
default:
|
||
case bfd_reloc_outofrange:
|
||
abort ();
|
||
case bfd_reloc_overflow:
|
||
{
|
||
const char *name;
|
||
|
||
if (h != NULL)
|
||
name = h->root.root.string;
|
||
else
|
||
{
|
||
name = bfd_elf_string_from_elf_section (input_bfd,
|
||
symtab_hdr->sh_link,
|
||
sym->st_name);
|
||
if (name == NULL)
|
||
return false;
|
||
if (*name == '\0')
|
||
name = bfd_section_name (input_bfd, sec);
|
||
}
|
||
if (! ((*info->callbacks->reloc_overflow)
|
||
(info, name, howto->name, (bfd_vma) 0,
|
||
input_bfd, input_section, rel->r_offset)))
|
||
return false;
|
||
}
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Finish up dynamic symbol handling. We set the contents of various
|
||
dynamic sections here. */
|
||
|
||
static boolean
|
||
elf32_sparc_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;
|
||
|
||
dynobj = elf_hash_table (info)->dynobj;
|
||
|
||
if (h->plt.offset != (bfd_vma) -1)
|
||
{
|
||
asection *splt;
|
||
asection *srela;
|
||
Elf_Internal_Rela rela;
|
||
|
||
/* 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);
|
||
|
||
/* Fill in the entry in the procedure linkage table. */
|
||
bfd_put_32 (output_bfd,
|
||
PLT_ENTRY_WORD0 + h->plt.offset,
|
||
splt->contents + h->plt.offset);
|
||
bfd_put_32 (output_bfd,
|
||
(PLT_ENTRY_WORD1
|
||
+ (((- (h->plt.offset + 4)) >> 2) & 0x3fffff)),
|
||
splt->contents + h->plt.offset + 4);
|
||
bfd_put_32 (output_bfd, PLT_ENTRY_WORD2,
|
||
splt->contents + h->plt.offset + 8);
|
||
|
||
/* 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_SPARC_JMP_SLOT);
|
||
rela.r_addend = 0;
|
||
bfd_elf32_swap_reloca_out (output_bfd, &rela,
|
||
((Elf32_External_Rela *) srela->contents
|
||
+ h->plt.offset / PLT_ENTRY_SIZE - 4));
|
||
|
||
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 the symbol is weak, we do need to clear the value.
|
||
Otherwise, the PLT entry would provide a definition for
|
||
the symbol even if the symbol wasn't defined anywhere,
|
||
and so the symbol would never be NULL. */
|
||
if ((h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR_NONWEAK)
|
||
== 0)
|
||
sym->st_value = 0;
|
||
}
|
||
}
|
||
|
||
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. */
|
||
|
||
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. Likewise if
|
||
the symbol was forced to be local because of a version file.
|
||
The entry in the global offset table will already have been
|
||
initialized in the relocate_section function. */
|
||
if (info->shared
|
||
&& (info->symbolic || h->dynindx == -1)
|
||
&& (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
|
||
rela.r_info = ELF32_R_INFO (0, R_SPARC_RELATIVE);
|
||
else
|
||
{
|
||
bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
|
||
rela.r_info = ELF32_R_INFO (h->dynindx, R_SPARC_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. */
|
||
|
||
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_SPARC_COPY);
|
||
rela.r_addend = 0;
|
||
bfd_elf32_swap_reloca_out (output_bfd, &rela,
|
||
((Elf32_External_Rela *) s->contents
|
||
+ s->reloc_count));
|
||
++s->reloc_count;
|
||
}
|
||
|
||
/* 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
|
||
elf32_sparc_finish_dynamic_sections (output_bfd, info)
|
||
bfd *output_bfd;
|
||
struct bfd_link_info *info;
|
||
{
|
||
bfd *dynobj;
|
||
asection *sdyn;
|
||
asection *sgot;
|
||
|
||
dynobj = elf_hash_table (info)->dynobj;
|
||
|
||
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);
|
||
}
|
||
}
|
||
|
||
/* Clear the first four entries in the procedure linkage table,
|
||
and put a nop in the last four bytes. */
|
||
if (splt->_raw_size > 0)
|
||
{
|
||
memset (splt->contents, 0, 4 * PLT_ENTRY_SIZE);
|
||
bfd_put_32 (output_bfd, SPARC_NOP,
|
||
splt->contents + splt->_raw_size - 4);
|
||
}
|
||
|
||
elf_section_data (splt->output_section)->this_hdr.sh_entsize =
|
||
PLT_ENTRY_SIZE;
|
||
}
|
||
|
||
/* Set the first entry in the global offset table to the address of
|
||
the dynamic section. */
|
||
sgot = bfd_get_section_by_name (dynobj, ".got");
|
||
BFD_ASSERT (sgot != NULL);
|
||
if (sgot->_raw_size > 0)
|
||
{
|
||
if (sdyn == NULL)
|
||
bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
|
||
else
|
||
bfd_put_32 (output_bfd,
|
||
sdyn->output_section->vma + sdyn->output_offset,
|
||
sgot->contents);
|
||
}
|
||
|
||
elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Functions for dealing with the e_flags field.
|
||
|
||
We don't define set_private_flags or copy_private_bfd_data because
|
||
the only currently defined values are based on the bfd mach number,
|
||
so we use the latter instead and defer setting e_flags until the
|
||
file is written out. */
|
||
|
||
/* Merge backend specific data from an object file to the output
|
||
object file when linking. */
|
||
|
||
static boolean
|
||
elf32_sparc_merge_private_bfd_data (ibfd, obfd)
|
||
bfd *ibfd;
|
||
bfd *obfd;
|
||
{
|
||
boolean error;
|
||
/* FIXME: This should not be static. */
|
||
static unsigned long previous_ibfd_e_flags = (unsigned long) -1;
|
||
|
||
if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
|
||
|| bfd_get_flavour (obfd) != bfd_target_elf_flavour)
|
||
return true;
|
||
|
||
error = false;
|
||
|
||
if (bfd_get_mach (ibfd) >= bfd_mach_sparc_v9)
|
||
{
|
||
error = true;
|
||
(*_bfd_error_handler)
|
||
(_("%s: compiled for a 64 bit system and target is 32 bit"),
|
||
bfd_get_filename (ibfd));
|
||
}
|
||
else if ((ibfd->flags & DYNAMIC) == 0)
|
||
{
|
||
if (bfd_get_mach (obfd) < bfd_get_mach (ibfd))
|
||
bfd_set_arch_mach (obfd, bfd_arch_sparc, bfd_get_mach (ibfd));
|
||
}
|
||
|
||
if (((elf_elfheader (ibfd)->e_flags & EF_SPARC_LEDATA)
|
||
!= previous_ibfd_e_flags)
|
||
&& previous_ibfd_e_flags != (unsigned long) -1)
|
||
{
|
||
(*_bfd_error_handler)
|
||
(_("%s: linking little endian files with big endian files"),
|
||
bfd_get_filename (ibfd));
|
||
error = true;
|
||
}
|
||
previous_ibfd_e_flags = elf_elfheader (ibfd)->e_flags & EF_SPARC_LEDATA;
|
||
|
||
if (error)
|
||
{
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return false;
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Set the right machine number. */
|
||
|
||
static boolean
|
||
elf32_sparc_object_p (abfd)
|
||
bfd *abfd;
|
||
{
|
||
if (elf_elfheader (abfd)->e_machine == EM_SPARC32PLUS)
|
||
{
|
||
if (elf_elfheader (abfd)->e_flags & EF_SPARC_SUN_US3)
|
||
return bfd_default_set_arch_mach (abfd, bfd_arch_sparc,
|
||
bfd_mach_sparc_v8plusb);
|
||
else if (elf_elfheader (abfd)->e_flags & EF_SPARC_SUN_US1)
|
||
return bfd_default_set_arch_mach (abfd, bfd_arch_sparc,
|
||
bfd_mach_sparc_v8plusa);
|
||
else if (elf_elfheader (abfd)->e_flags & EF_SPARC_32PLUS)
|
||
return bfd_default_set_arch_mach (abfd, bfd_arch_sparc,
|
||
bfd_mach_sparc_v8plus);
|
||
else
|
||
return false;
|
||
}
|
||
else if (elf_elfheader (abfd)->e_flags & EF_SPARC_LEDATA)
|
||
return bfd_default_set_arch_mach (abfd, bfd_arch_sparc,
|
||
bfd_mach_sparc_sparclite_le);
|
||
else
|
||
return bfd_default_set_arch_mach (abfd, bfd_arch_sparc, bfd_mach_sparc);
|
||
}
|
||
|
||
/* The final processing done just before writing out the object file.
|
||
We need to set the e_machine field appropriately. */
|
||
|
||
static void
|
||
elf32_sparc_final_write_processing (abfd, linker)
|
||
bfd *abfd;
|
||
boolean linker ATTRIBUTE_UNUSED;
|
||
{
|
||
switch (bfd_get_mach (abfd))
|
||
{
|
||
case bfd_mach_sparc :
|
||
break; /* nothing to do */
|
||
case bfd_mach_sparc_v8plus :
|
||
elf_elfheader (abfd)->e_machine = EM_SPARC32PLUS;
|
||
elf_elfheader (abfd)->e_flags &=~ EF_SPARC_32PLUS_MASK;
|
||
elf_elfheader (abfd)->e_flags |= EF_SPARC_32PLUS;
|
||
break;
|
||
case bfd_mach_sparc_v8plusa :
|
||
elf_elfheader (abfd)->e_machine = EM_SPARC32PLUS;
|
||
elf_elfheader (abfd)->e_flags &=~ EF_SPARC_32PLUS_MASK;
|
||
elf_elfheader (abfd)->e_flags |= EF_SPARC_32PLUS | EF_SPARC_SUN_US1;
|
||
break;
|
||
case bfd_mach_sparc_v8plusb :
|
||
elf_elfheader (abfd)->e_machine = EM_SPARC32PLUS;
|
||
elf_elfheader (abfd)->e_flags &=~ EF_SPARC_32PLUS_MASK;
|
||
elf_elfheader (abfd)->e_flags |= EF_SPARC_32PLUS | EF_SPARC_SUN_US1
|
||
| EF_SPARC_SUN_US3;
|
||
break;
|
||
case bfd_mach_sparc_sparclite_le :
|
||
elf_elfheader (abfd)->e_machine = EM_SPARC;
|
||
elf_elfheader (abfd)->e_flags |= EF_SPARC_LEDATA;
|
||
break;
|
||
default :
|
||
abort ();
|
||
break;
|
||
}
|
||
}
|
||
|
||
static enum elf_reloc_type_class
|
||
elf32_sparc_reloc_type_class (type)
|
||
int type;
|
||
{
|
||
switch (type)
|
||
{
|
||
case R_SPARC_RELATIVE:
|
||
return reloc_class_relative;
|
||
case R_SPARC_JMP_SLOT:
|
||
return reloc_class_plt;
|
||
case R_SPARC_COPY:
|
||
return reloc_class_copy;
|
||
default:
|
||
return reloc_class_normal;
|
||
}
|
||
}
|
||
|
||
#define TARGET_BIG_SYM bfd_elf32_sparc_vec
|
||
#define TARGET_BIG_NAME "elf32-sparc"
|
||
#define ELF_ARCH bfd_arch_sparc
|
||
#define ELF_MACHINE_CODE EM_SPARC
|
||
#define ELF_MACHINE_ALT1 EM_SPARC32PLUS
|
||
#define ELF_MAXPAGESIZE 0x10000
|
||
|
||
#define bfd_elf32_bfd_reloc_type_lookup elf32_sparc_reloc_type_lookup
|
||
#define bfd_elf32_bfd_relax_section elf32_sparc_relax_section
|
||
#define elf_info_to_howto elf32_sparc_info_to_howto
|
||
#define elf_backend_create_dynamic_sections \
|
||
_bfd_elf_create_dynamic_sections
|
||
#define elf_backend_check_relocs elf32_sparc_check_relocs
|
||
#define elf_backend_adjust_dynamic_symbol \
|
||
elf32_sparc_adjust_dynamic_symbol
|
||
#define elf_backend_size_dynamic_sections \
|
||
elf32_sparc_size_dynamic_sections
|
||
#define elf_backend_relocate_section elf32_sparc_relocate_section
|
||
#define elf_backend_finish_dynamic_symbol \
|
||
elf32_sparc_finish_dynamic_symbol
|
||
#define elf_backend_finish_dynamic_sections \
|
||
elf32_sparc_finish_dynamic_sections
|
||
#define bfd_elf32_bfd_merge_private_bfd_data \
|
||
elf32_sparc_merge_private_bfd_data
|
||
#define elf_backend_object_p elf32_sparc_object_p
|
||
#define elf_backend_final_write_processing \
|
||
elf32_sparc_final_write_processing
|
||
#define elf_backend_gc_mark_hook elf32_sparc_gc_mark_hook
|
||
#define elf_backend_gc_sweep_hook elf32_sparc_gc_sweep_hook
|
||
#define elf_backend_reloc_type_class elf32_sparc_reloc_type_class
|
||
|
||
#define elf_backend_can_gc_sections 1
|
||
#define elf_backend_want_got_plt 0
|
||
#define elf_backend_plt_readonly 0
|
||
#define elf_backend_want_plt_sym 1
|
||
#define elf_backend_got_header_size 4
|
||
#define elf_backend_plt_header_size (4*PLT_ENTRY_SIZE)
|
||
|
||
#include "elf32-target.h"
|