From 30dc85f1b88df0735816442a23fee5bc601c64a0 Mon Sep 17 00:00:00 2001 From: Ian Lance Taylor Date: Mon, 3 Jul 1995 17:05:56 +0000 Subject: [PATCH] * elf32-i386.c (elf_i386_adjust_dynamic_symbol): Correct BFD_ASSERT to handle __start_SECNAME symbols automatically defined by the linker. * elf32-sparc.c (elf32_sparc_adjust_dynamic_symbol): Likewise. * elf32-m68k.c (elf_m68k_adjust_dynamic_symbol): Likewise. --- bfd/ChangeLog | 6 + bfd/elf32-i386.c | 76 +- bfd/elf32-m68k.c | 1697 +++++++++++++++++++++++++++++++++++++++++++++ bfd/elf32-sparc.c | 33 +- 4 files changed, 1766 insertions(+), 46 deletions(-) create mode 100644 bfd/elf32-m68k.c diff --git a/bfd/ChangeLog b/bfd/ChangeLog index 79f457179b..6cb306edfe 100644 --- a/bfd/ChangeLog +++ b/bfd/ChangeLog @@ -1,5 +1,11 @@ Mon Jul 3 11:30:45 1995 Ian Lance Taylor + * elf32-i386.c (elf_i386_adjust_dynamic_symbol): Correct + BFD_ASSERT to handle __start_SECNAME symbols automatically defined + by the linker. + * elf32-sparc.c (elf32_sparc_adjust_dynamic_symbol): Likewise. + * elf32-m68k.c (elf_m68k_adjust_dynamic_symbol): Likewise. + * Makefile.in: Rebuild dependencies. (BFD32_BACKENDS): Add versados.o. (CFILES): Add pe-i386.c, pei-i386.c, and versados.c. diff --git a/bfd/elf32-i386.c b/bfd/elf32-i386.c index 844138f31e..3d56995b0d 100644 --- a/bfd/elf32-i386.c +++ b/bfd/elf32-i386.c @@ -1,5 +1,5 @@ /* Intel 80386/80486-specific support for 32-bit ELF - Copyright 1993 Free Software Foundation, Inc. + Copyright 1993, 1994, 1995 Free Software Foundation, Inc. This file is part of BFD, the Binary File Descriptor library. @@ -23,7 +23,7 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include "libbfd.h" #include "libelf.h" -static CONST struct reloc_howto_struct *elf_i386_reloc_type_lookup +static reloc_howto_type *elf_i386_reloc_type_lookup PARAMS ((bfd *, bfd_reloc_code_real_type)); static void elf_i386_info_to_howto PARAMS ((bfd *, arelent *, Elf32_Internal_Rela *)); @@ -105,7 +105,7 @@ static reloc_howto_type elf_howto_table[]= #define TRACE(str) #endif -static CONST struct reloc_howto_struct * +static reloc_howto_type * elf_i386_reloc_type_lookup (abfd, code) bfd *abfd; bfd_reloc_code_real_type code; @@ -607,20 +607,22 @@ elf_i386_adjust_dynamic_symbol (info, h) 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->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 - && (elf_elfheader (h->root.u.def.section->owner)->e_type - == ET_DYN) - && h->root.type == bfd_link_hash_defined - && (bfd_get_flavour (h->root.u.def.section->owner) - == bfd_target_elf_flavour) - && h->root.u.def.section->output_section == NULL))); + BFD_ASSERT (dynobj != NULL); + BFD_ASSERT ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) + || ((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 + && (h->root.type == bfd_link_hash_defined + || h->root.type == bfd_link_hash_defweak) + && (h->root.u.def.section->owner == NULL + || ((elf_elfheader (h->root.u.def.section->owner)->e_type + == ET_DYN) + && (bfd_get_flavour (h->root.u.def.section->owner) + == bfd_target_elf_flavour) + && h->root.u.def.section->output_section == NULL)))); /* If this is a function, put it in the procedure linkage table. We will fill in the contents of the procedure linkage table later, @@ -685,7 +687,8 @@ elf_i386_adjust_dynamic_symbol (info, h) 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); + 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; @@ -980,6 +983,7 @@ elf_i386_relocate_section (output_bfd, info, input_bfd, input_section, asection *sec; bfd_vma relocation; bfd_reloc_status_type r; + char *shared_name; r_type = ELF32_R_TYPE (rel->r_info); if (r_type < 0 || r_type >= (int) R_386_max) @@ -1018,6 +1022,8 @@ elf_i386_relocate_section (output_bfd, info, input_bfd, input_section, h = NULL; sym = NULL; sec = NULL; + shared_name = NULL; + if (r_symndx < symtab_hdr->sh_info) { sym = local_syms + r_symndx; @@ -1029,7 +1035,8 @@ elf_i386_relocate_section (output_bfd, info, input_bfd, input_section, else { h = sym_hashes[r_symndx - symtab_hdr->sh_info]; - if (h->root.type == bfd_link_hash_defined) + 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_386_GOTPC @@ -1052,7 +1059,7 @@ elf_i386_relocate_section (output_bfd, info, input_bfd, input_section, + sec->output_section->vma + sec->output_offset); } - else if (h->root.type == bfd_link_hash_weak) + else if (h->root.type == bfd_link_hash_undefweak) relocation = 0; else if (info->shared) relocation = 0; @@ -1225,21 +1232,19 @@ elf_i386_relocate_section (output_bfd, info, input_bfd, input_section, if (sreloc == NULL) { - const char *name; - - name = (elf_string_from_elf_section + shared_name = (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) + if (shared_name == NULL) return false; - BFD_ASSERT (strncmp (name, ".rel", 4) == 0 + BFD_ASSERT (strncmp (shared_name, ".rel", 4) == 0 && strcmp (bfd_get_section_name (input_bfd, input_section), - name + 4) == 0); + shared_name + 4) == 0); - sreloc = bfd_get_section_by_name (dynobj, name); + sreloc = bfd_get_section_by_name (dynobj, shared_name); BFD_ASSERT (sreloc != NULL); } @@ -1248,8 +1253,18 @@ elf_i386_relocate_section (output_bfd, info, input_bfd, input_section, + input_section->output_offset); if (r_type == R_386_PC32) { - BFD_ASSERT (h != NULL && h->dynindx != -1); - outrel.r_info = ELF32_R_INFO (h->dynindx, R_386_PC32); + if (!h) + { + if (! ((*info->callbacks->undefined_symbol) + (info, shared_name ? shared_name : sec->name, input_bfd, + input_section, rel->r_offset))) + bfd_set_error (bfd_error_bad_value); + return false; + } + else { + BFD_ASSERT (h->dynindx != -1); + outrel.r_info = ELF32_R_INFO (h->dynindx, R_386_PC32); + } } else { @@ -1450,7 +1465,8 @@ elf_i386_finish_dynamic_symbol (output_bfd, info, h, sym) /* This symbol needs a copy reloc. Set it up. */ BFD_ASSERT (h->dynindx != -1 - && h->root.type == bfd_link_hash_defined); + && (h->root.type == bfd_link_hash_defined + || h->root.type == bfd_link_hash_defweak)); s = bfd_get_section_by_name (h->root.u.def.section->owner, ".rel.bss"); diff --git a/bfd/elf32-m68k.c b/bfd/elf32-m68k.c new file mode 100644 index 0000000000..5ba6527a19 --- /dev/null +++ b/bfd/elf32-m68k.c @@ -0,0 +1,1697 @@ +/* Motorola 68k series support for 32-bit ELF + Copyright 1993 Free Software Foundation, Inc. + +This file is part of BFD, the Binary File Descriptor library. + +This program is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program; if not, write to the Free Software +Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ + +#include "bfd.h" +#include "sysdep.h" +#include "bfdlink.h" +#include "libbfd.h" +#include "libelf.h" + +static reloc_howto_type *reloc_type_lookup + PARAMS ((bfd *, bfd_reloc_code_real_type)); +static void rtype_to_howto + PARAMS ((bfd *, arelent *, Elf32_Internal_Rela *)); +static void rtype_to_howto_rel + PARAMS ((bfd *, arelent *, Elf32_Internal_Rel *)); +static boolean elf_m68k_create_dynamic_sections + PARAMS ((bfd *, struct bfd_link_info *)); +static boolean elf_m68k_create_got_section + PARAMS ((bfd *, struct bfd_link_info *)); +static boolean elf_m68k_check_relocs + PARAMS ((bfd *, struct bfd_link_info *, asection *, + const Elf_Internal_Rela *)); +static boolean elf_m68k_adjust_dynamic_symbol + PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); +static boolean elf_m68k_adjust_dynindx + PARAMS ((struct elf_link_hash_entry *, PTR)); +static boolean elf_m68k_size_dynamic_sections + PARAMS ((bfd *, struct bfd_link_info *)); +static boolean elf_m68k_relocate_section + PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, + Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); +static boolean elf_m68k_finish_dynamic_symbol + PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, + Elf_Internal_Sym *)); +static boolean elf_m68k_finish_dynamic_sections + PARAMS ((bfd *, struct bfd_link_info *)); + +/* elf32 m68k code, generated by elf.el */ +enum reloc_type { + R_68K_NONE = 0, + R_68K_32 = 1, + R_68K_16 = 2, + R_68K_8 = 3, + R_68K_PC32 = 4, + R_68K_PC16 = 5, + R_68K_PC8 = 6, + R_68K_GOT32 = 7, + R_68K_GOT16 = 8, + R_68K_GOT8 = 9, + R_68K_GOT32O = 10, + R_68K_GOT16O = 11, + R_68K_GOT8O = 12, + R_68K_PLT32 = 13, + R_68K_PLT16 = 14, + R_68K_PLT8 = 15, + R_68K_PLT32O = 16, + R_68K_PLT16O = 17, + R_68K_PLT8O = 18, + R_68K_COPY = 19, + R_68K_GLOB_DAT = 20, + R_68K_JMP_SLOT = 21, + R_68K_RELATIVE = 22, + R_68K__max +}; + +static reloc_howto_type howto_table[] = { + HOWTO(R_68K_NONE, 0, 0, 0, false,0, complain_overflow_dont, bfd_elf_generic_reloc, "R_68K_NONE", false, 0x00000000, 0x00000000,false), + HOWTO(R_68K_32, 0, 2,32, false,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_32", false, 0xffffffff, 0xffffffff,false), + HOWTO(R_68K_16, 0, 1,16, false,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_16", false, 0x0000ffff, 0x0000ffff,false), + HOWTO(R_68K_8, 0, 0, 8, false,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_8", false, 0x000000ff, 0x000000ff,false), + HOWTO(R_68K_PC32, 0, 2,32, true, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PC32", false, 0xffffffff, 0xffffffff,true), + HOWTO(R_68K_PC16, 0, 1,16, true, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PC16", false, 0x0000ffff, 0x0000ffff,true), + HOWTO(R_68K_PC8, 0, 0, 8, true, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PC8", false, 0x000000ff, 0x000000ff,true), + HOWTO(R_68K_GOT32, 0, 2,32, true, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_GOT32", false, 0xffffffff, 0xffffffff,true), + HOWTO(R_68K_GOT16, 0, 1,16, true, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_GOT16", false, 0x0000ffff, 0x0000ffff,true), + HOWTO(R_68K_GOT8, 0, 0, 8, true, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_GOT8", false, 0x000000ff, 0x000000ff,true), + HOWTO(R_68K_GOT32O, 0, 2,32, false,0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_GOT32O", false, 0xffffffff, 0xffffffff,false), + HOWTO(R_68K_GOT16O, 0, 1,16, false,0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_GOT16O", false, 0x0000ffff, 0x0000ffff,false), + HOWTO(R_68K_GOT8O, 0, 0, 8, false,0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_GOT8O", false, 0x000000ff, 0x000000ff,false), + HOWTO(R_68K_PLT32, 0, 2,32, true, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PLT32", false, 0xffffffff, 0xffffffff,true), + HOWTO(R_68K_PLT16, 0, 1,16, true, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PLT16", false, 0x0000ffff, 0x0000ffff,true), + HOWTO(R_68K_PLT8, 0, 0, 8, true, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PLT8", false, 0x000000ff, 0x000000ff,true), + HOWTO(R_68K_PLT32O, 0, 2,32, false,0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PLT32O", false, 0xffffffff, 0xffffffff,false), + HOWTO(R_68K_PLT16O, 0, 1,16, false,0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PLT16O", false, 0x0000ffff, 0x0000ffff,false), + HOWTO(R_68K_PLT8O, 0, 0, 8, false,0, complain_overflow_signed, bfd_elf_generic_reloc, "R_68K_PLT8O", false, 0x000000ff, 0x000000ff,false), + HOWTO(R_68K_COPY, 0, 0, 0, false,0, complain_overflow_dont, bfd_elf_generic_reloc, "R_68K_COPY", false, 0xffffffff, 0xffffffff,false), + HOWTO(R_68K_GLOB_DAT, 0, 2,32, false,0, complain_overflow_dont, bfd_elf_generic_reloc, "R_68K_GLOB_DAT", false, 0xffffffff, 0xffffffff,false), + HOWTO(R_68K_JMP_SLOT, 0, 2,32, false,0, complain_overflow_dont, bfd_elf_generic_reloc, "R_68K_JMP_SLOT", false, 0xffffffff, 0xffffffff,false), + HOWTO(R_68K_RELATIVE, 0, 2,32, false,0, complain_overflow_dont, bfd_elf_generic_reloc, "R_68K_RELATIVE", false, 0xffffffff, 0xffffffff,false), +}; + +static void +rtype_to_howto (abfd, cache_ptr, dst) + bfd *abfd; + arelent *cache_ptr; + Elf_Internal_Rela *dst; +{ + BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_68K__max); + cache_ptr->howto = &howto_table[ELF32_R_TYPE(dst->r_info)]; +} + +static void +rtype_to_howto_rel (abfd, cache_ptr, dst) + bfd *abfd; + arelent *cache_ptr; + Elf_Internal_Rel *dst; +{ + BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_68K__max); + cache_ptr->howto = &howto_table[ELF32_R_TYPE(dst->r_info)]; +} + +#define elf_info_to_howto rtype_to_howto +#define elf_info_to_howto_rel rtype_to_howto_rel + +static const struct { unsigned char bfd_val, elf_val; } reloc_map[] = { + { BFD_RELOC_NONE, R_68K_NONE }, + { BFD_RELOC_32, R_68K_32 }, + { BFD_RELOC_16, R_68K_16 }, + { BFD_RELOC_8, R_68K_8 }, + { BFD_RELOC_32_PCREL, R_68K_PC32 }, + { BFD_RELOC_16_PCREL, R_68K_PC16 }, + { BFD_RELOC_8_PCREL, R_68K_PC8 }, + { BFD_RELOC_32_GOT_PCREL, R_68K_GOT32 }, + { BFD_RELOC_16_GOT_PCREL, R_68K_GOT16 }, + { BFD_RELOC_8_GOT_PCREL, R_68K_GOT8 }, + { BFD_RELOC_32_GOTOFF, R_68K_GOT32O }, + { BFD_RELOC_16_GOTOFF, R_68K_GOT16O }, + { BFD_RELOC_8_GOTOFF, R_68K_GOT8O }, + { BFD_RELOC_32_PLT_PCREL, R_68K_PLT32 }, + { BFD_RELOC_16_PLT_PCREL, R_68K_PLT16 }, + { BFD_RELOC_8_PLT_PCREL, R_68K_PLT8 }, + { BFD_RELOC_32_PLTOFF, R_68K_PLT32O }, + { BFD_RELOC_16_PLTOFF, R_68K_PLT16O }, + { BFD_RELOC_8_PLTOFF, R_68K_PLT8O }, + { BFD_RELOC_NONE, R_68K_COPY }, + { BFD_RELOC_68K_GLOB_DAT, R_68K_GLOB_DAT }, + { BFD_RELOC_68K_JMP_SLOT, R_68K_JMP_SLOT }, + { BFD_RELOC_68K_RELATIVE, R_68K_RELATIVE }, + { BFD_RELOC_CTOR, R_68K_32 }, +}; + +static reloc_howto_type * +reloc_type_lookup (abfd, code) + bfd *abfd; + bfd_reloc_code_real_type code; +{ + int i; + for (i = 0; i < sizeof (reloc_map) / sizeof (reloc_map[0]); i++) + { + if (reloc_map[i].bfd_val == code) + return &howto_table[(int) reloc_map[i].elf_val]; + } + return 0; +} + +#define bfd_elf32_bfd_reloc_type_lookup reloc_type_lookup +#define ELF_ARCH bfd_arch_m68k +/* end code generated by elf.el */ + +#define USE_RELA + + +/* Functions for the m68k ELF linker. */ + +/* The name of the dynamic interpreter. This is put in the .interp + section. */ + +#define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1" + +/* The size in bytes of an entry in the procedure linkage table. */ + +#define PLT_ENTRY_SIZE 20 + +/* The first entry in a procedure linkage table looks like this. See + the SVR4 ABI m68k supplement to see how this works. */ + +static const bfd_byte elf_m68k_plt0_entry[PLT_ENTRY_SIZE] = +{ + 0x2f, 0x3b, 0x01, 0x70, /* move.l (%pc,addr),-(%sp) */ + 0, 0, 0, 0, /* replaced with address of .got + 4. */ + 0x4e, 0xfb, 0x01, 0x71, /* jmp ([%pc,addr]) */ + 0, 0, 0, 0, /* replaced with address of .got + 8. */ + 0, 0, 0, 0 /* pad out to 20 bytes. */ +}; + +/* Subsequent entries in a procedure linkage table look like this. */ + +static const bfd_byte elf_m68k_plt_entry[PLT_ENTRY_SIZE] = +{ + 0x4e, 0xfb, 0x01, 0x71, /* jmp ([addr]) */ + 0, 0, 0, 0, /* replaced with address of this symbol in .got. */ + 0x2f, 0x3c, /* move.l #offset,-(%sp) */ + 0, 0, 0, 0, /* replaced with offset into relocation table. */ + 0x60, 0xff, /* bra.l .plt */ + 0, 0, 0, 0 /* replaced with offset to start of .plt. */ +}; + +/* Create dynamic sections when linking against a dynamic object. */ + +static boolean +elf_m68k_create_dynamic_sections (abfd, info) + bfd *abfd; + struct bfd_link_info *info; +{ + flagword flags; + register asection *s; + + /* We need to create .plt, .rela.plt, .got, .got.plt, .dynbss, and + .rela.bss sections. */ + + flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY; + + s = bfd_make_section (abfd, ".plt"); + if (s == NULL + || !bfd_set_section_flags (abfd, s, flags | SEC_READONLY | SEC_CODE) + || !bfd_set_section_alignment (abfd, s, 2)) + return false; + + s = bfd_make_section (abfd, ".rela.plt"); + if (s == NULL + || !bfd_set_section_flags (abfd, s, flags | SEC_READONLY) + || !bfd_set_section_alignment (abfd, s, 2)) + return false; + + if (!elf_m68k_create_got_section (abfd, info)) + return false; + + /* The .dynbss section is a place to put symbols which are defined + by dynamic objects, are referenced by regular objects, and are + not functions. We must allocate space for them in the process + image and use a R_68K_COPY reloc to tell the dynamic linker to + initialize them at run time. The linker script puts the .dynbss + section into the .bss section of the final image. */ + s = bfd_make_section (abfd, ".dynbss"); + if (s == NULL + || !bfd_set_section_flags (abfd, s, SEC_ALLOC)) + return false; + + /* The .rela.bss section holds copy relocs. This section is not + normally needed. We need to create it here, though, so that the + linker will map it to an output section. We can't just create it + only if we need it, because we will not know whether we need it + until we have seen all the input files, and the first time the + main linker code calls BFD after examining all the input files + (size_dynamic_sections) the input sections have already been + mapped to the output sections. If the section turns out not to + be needed, we can discard it later. We will never need this + section when generating a shared object, since they do not use + copy relocs. */ + if (!info->shared) + { + s = bfd_make_section (abfd, ".rela.bss"); + if (s == NULL + || !bfd_set_section_flags (abfd, s, flags | SEC_READONLY) + || !bfd_set_section_alignment (abfd, s, 2)) + return false; + } + + return true; +} + +/* Create the .got section to hold the global offset table, and the + .got.plt section to hold procedure linkage table GOT entries. The + linker script will put .got.plt into the output .got section. */ + +static boolean +elf_m68k_create_got_section (abfd, info) + bfd *abfd; + struct bfd_link_info *info; +{ + flagword flags; + register asection *s; + struct elf_link_hash_entry *h; + + /* This function may be called more than once. */ + if (bfd_get_section_by_name (abfd, ".got") != NULL) + return true; + + flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY; + + s = bfd_make_section (abfd, ".got"); + if (s == NULL + || !bfd_set_section_flags (abfd, s, flags) + || !bfd_set_section_alignment (abfd, s, 2)) + return false; + + s = bfd_make_section (abfd, ".got.plt"); + if (s == NULL + || !bfd_set_section_flags (abfd, s, flags) + || !bfd_set_section_alignment (abfd, s, 2)) + return false; + + /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the + .got.plt section, which will be placed at the start of the output + .got section. We don't do this in the linker script because we + don't want to define the symbol if we are not creating a global + offset table. */ + h = NULL; + if (!(_bfd_generic_link_add_one_symbol + (info, abfd, "_GLOBAL_OFFSET_TABLE_", BSF_GLOBAL, s, (bfd_vma) 0, + (const char *) NULL, false, get_elf_backend_data (abfd)->collect, + (struct bfd_link_hash_entry **) &h))) + return false; + h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; + h->type = STT_OBJECT; + + if (info->shared + && !bfd_elf32_link_record_dynamic_symbol (info, h)) + return false; + + /* The first three global offset table entries are reserved. */ + s->_raw_size += 3 * 4; + + 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 +elf_m68k_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++) + { + 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_68K_GOT8: + case R_68K_GOT16: + case R_68K_GOT32: + case R_68K_GOT8O: + case R_68K_GOT16O: + case R_68K_GOT32O: + /* This symbol requires a global offset table entry. */ + + if (h != NULL + && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) + break; + + if (dynobj == NULL) + { + /* Create the .got section. */ + elf_hash_table (info)->dynobj = dynobj = abfd; + if (!elf_m68k_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_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 int i; + + size = symtab_hdr->sh_info * sizeof (bfd_vma); + local_got_offsets = (bfd_vma *) bfd_alloc (abfd, size); + if (local_got_offsets == NULL) + { + bfd_set_error (bfd_error_no_memory); + 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_68K_RELATIVE reloc so that the dynamic + linker can adjust this GOT entry. */ + srelgot->_raw_size += sizeof (Elf32_External_Rela); + } + } + + sgot->_raw_size += 4; + break; + + case R_68K_PLT8: + case R_68K_PLT16: + case R_68K_PLT32: + case R_68K_PLT8O: + case R_68K_PLT16O: + case R_68K_PLT32O: + /* 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 this is a local symbol, we resolve it directly without + creating a procedure linkage table entry. */ + if (h == NULL) + continue; + + /* 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_68K_8: + case R_68K_16: + case R_68K_32: + case R_68K_PC8: + case R_68K_PC16: + case R_68K_PC32: + if (info->shared + && (sec->flags & SEC_ALLOC) != 0) + { + /* When creating a shared object, we must copy these + reloc types into the output file. We create a reloc + section in dynobj and make room for this reloc. */ + if (sreloc == NULL) + { + const char *name; + + name = (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) + { + sreloc = bfd_make_section (dynobj, name); + if (sreloc == NULL + || !bfd_set_section_flags (dynobj, sreloc, + (SEC_ALLOC + | SEC_LOAD + | SEC_HAS_CONTENTS + | SEC_IN_MEMORY + | SEC_READONLY)) + || !bfd_set_section_alignment (dynobj, sreloc, 2)) + return false; + } + } + + sreloc->_raw_size += sizeof (Elf32_External_Rela); + } + + 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 +elf_m68k_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); + BFD_ASSERT ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) + || ((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 + && (h->root.type == bfd_link_hash_defined + || h->root.type == bfd_link_hash_defweak) + && (h->root.u.def.section->owner == NULL + || ((elf_elfheader (h->root.u.def.section->owner)->e_type + == ET_DYN) + && (bfd_get_flavour (h->root.u.def.section->owner) + == bfd_target_elf_flavour) + && h->root.u.def.section->output_section == NULL)))); + + /* 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 (!elf_hash_table (info)->dynamic_sections_created) + { + /* This case can occur if we saw a PLT32 reloc in an input + file, but none of the input files were dynamic objects. + 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; + } + + 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_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 = 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 .got.plt section, which + will be placed in the .got section by the linker script. */ + + s = bfd_get_section_by_name (dynobj, ".got.plt"); + BFD_ASSERT (s != NULL); + s->_raw_size += 4; + + /* 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); + + /* If the symbol is currently defined in the .bss section of the + dynamic object, then it is OK to simply initialize it to zero. + If the symbol is in some other section, we must generate a + R_68K_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_LOAD) != 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 +elf_m68k_size_dynamic_sections (output_bfd, info) + bfd *output_bfd; + struct bfd_link_info *info; +{ + bfd *dynobj; + asection *s; + boolean plt; + boolean relocs; + boolean reltext; + + 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 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. */ + plt = false; + relocs = false; + reltext = false; + for (s = dynobj->sections; s != NULL; s = s->next) + { + const char *name; + boolean strip; + + if ((s->flags & SEC_IN_MEMORY) == 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; + + /* Remember whether there are any reloc sections other + than .rela.plt. */ + if (strcmp (name, ".rela.plt") != 0) + { + relocs = true; + + /* If this relocation section applies to a read only + section, then we probably need a DT_TEXTREL + entry. .rela.plt is actually associated with + .got.plt, which is never readonly. */ + target = bfd_get_section_by_name (output_bfd, name + 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 (strncmp (name, ".got", 4) != 0) + { + /* It's not one of our sections, so don't allocate space. */ + continue; + } + + if (strip) + { + asection **spp; + + for (spp = &s->output_section->owner->sections; + *spp != s->output_section; + spp = &(*spp)->next) + ; + *spp = s->output_section->next; + --s->output_section->owner->section_count; + + continue; + } + + /* Allocate memory for the section contents. */ + s->contents = (bfd_byte *) bfd_alloc (dynobj, s->_raw_size); + if (s->contents == NULL && s->_raw_size != 0) + { + bfd_set_error (bfd_error_no_memory); + return false; + } + } + + if (elf_hash_table (info)->dynamic_sections_created) + { + /* Add some entries to the .dynamic section. We fill in the + values later, in elf_m68k_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. */ + if (info->shared) + { + int c, i; + + c = bfd_count_sections (output_bfd); + elf_link_hash_traverse (elf_hash_table (info), + elf_m68k_adjust_dynindx, + (PTR) &c); + elf_hash_table (info)->dynsymcount += c; + + for (i = 1, s = output_bfd->sections; s != NULL; s = s->next, i++) + { + elf_section_data (s)->dynindx = i; + /* These symbols will have no names, so we don't need to + fiddle with dynstr_index. */ + } + } + + return true; +} + +/* Increment the index of a dynamic symbol by a given amount. Called + via elf_link_hash_traverse. */ + +static boolean +elf_m68k_adjust_dynindx (h, cparg) + struct elf_link_hash_entry *h; + PTR cparg; +{ + int *cp = (int *) cparg; + + if (h->dynindx != -1) + h->dynindx += *cp; + return true; +} + +/* Relocate an M68K ELF section. */ + +static boolean +elf_m68k_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; + asection *sgot; + asection *sgotplt; + 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); + + sgot = NULL; + sgotplt = NULL; + splt = NULL; + sreloc = NULL; + + rel = relocs; + relend = relocs + input_section->reloc_count; + for (; rel < relend; rel++) + { + int r_type; + reloc_howto_type *howto; + 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 < 0 || r_type >= (int) R_68K__max) + { + bfd_set_error (bfd_error_bad_value); + return false; + } + howto = 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]; + 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_68K_PLT8 + || r_type == R_68K_PLT16 + || r_type == R_68K_PLT32 + || r_type == R_68K_PLT8O + || r_type == R_68K_PLT16O + || r_type == R_68K_PLT32O) + && h->plt_offset != (bfd_vma) -1) + || ((r_type == R_68K_GOT8O + || r_type == R_68K_GOT16O + || r_type == R_68K_GOT32O + || ((r_type == R_68K_GOT8 + || r_type == R_68K_GOT16 + || r_type == R_68K_GOT32) + && strcmp (h->root.root.string, + "_GLOBAL_OFFSET_TABLE_") != 0)) + && elf_hash_table (info)->dynamic_sections_created) + || (info->shared + && (input_section->flags & SEC_ALLOC) != 0 + && (r_type == R_68K_8 + || r_type == R_68K_16 + || r_type == R_68K_32 + || r_type == R_68K_PC8 + || r_type == R_68K_PC16 + || r_type == R_68K_PC32))) + { + /* 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 + { + if (!(info->callbacks->undefined_symbol + (info, h->root.root.string, input_bfd, + input_section, rel->r_offset))) + return false; + relocation = 0; + } + } + + switch (r_type) + { + case R_68K_GOT8: + case R_68K_GOT16: + case R_68K_GOT32: + /* Relocation is to the entry for this symbol in the global + offset table. */ + if (h != NULL + && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) + break; + /* Fall through. */ + case R_68K_GOT8O: + case R_68K_GOT16O: + case R_68K_GOT32O: + /* Relocation is the offset of 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 (sgotplt == NULL) + { + sgotplt = bfd_get_section_by_name (dynobj, ".got.plt"); + BFD_ASSERT (sgotplt != 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) + { + /* This is actually a static link. 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; + if (r_type == R_68K_GOT8O + || r_type == R_68K_GOT16O + || r_type == R_68K_GOT32O) + relocation -= sgotplt->output_offset; + } + 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 generated the necessary reloc. */ + 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; + + 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_68K_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; + if (r_type == R_68K_GOT8O + || r_type == R_68K_GOT16O + || r_type == R_68K_GOT32O) + relocation -= sgotplt->output_offset; + } + + break; + + case R_68K_PLT8: + case R_68K_PLT16: + case R_68K_PLT32: + /* Relocation is to the entry for this symbol in the + procedure linkage table. */ + + /* Resolve a PLT32 reloc against a local symbol directly, + without using the procedure linkage table. */ + 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. */ + 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_68K_PLT8O: + case R_68K_PLT16O: + case R_68K_PLT32O: + /* Relocation is the offset of 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. */ + break; + } + + if (splt == NULL) + { + splt = bfd_get_section_by_name (dynobj, ".plt"); + BFD_ASSERT (splt != NULL); + } + + relocation = h->plt_offset; + break; + + case R_68K_8: + case R_68K_16: + case R_68K_32: + case R_68K_PC8: + case R_68K_PC16: + case R_68K_PC32: + if (info->shared + && (input_section->flags & SEC_ALLOC) != 0) + { + Elf_Internal_Rela outrel; + + /* 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 = (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); + } + + outrel.r_offset = (rel->r_offset + + input_section->output_section->vma + + input_section->output_offset); + if (h != NULL) + { + 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_68K_32) + { + outrel.r_info = ELF32_R_INFO (0, R_68K_RELATIVE); + outrel.r_addend = relocation + rel->r_addend; + } + else + { + long indx; + + sym = local_syms + r_symndx; + + BFD_ASSERT (ELF_ST_TYPE (sym->st_info) == STT_SECTION); + + sec = local_sections[r_symndx]; + if (sec != NULL && bfd_is_abs_section (sec)) + indx = 0; + else if (sec == NULL || sec->owner == NULL) + { + bfd_set_error (bfd_error_bad_value); + return false; + } + else + { + asection *osec; + + osec = sec->output_section; + indx = elf_section_data (osec)->dynindx; + if (indx == 0) + abort (); + } + + outrel.r_info = ELF32_R_INFO (indx, r_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_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 = 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 +elf_m68k_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 *sgot; + asection *srela; + bfd_vma plt_index; + bfd_vma got_offset; + 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"); + sgot = bfd_get_section_by_name (dynobj, ".got.plt"); + srela = bfd_get_section_by_name (dynobj, ".rela.plt"); + BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL); + + /* Get the index in the procedure linkage table which + corresponds to this symbol. This is the index of this symbol + in all the symbols for which we are making plt entries. The + first entry in the procedure linkage table is reserved. */ + plt_index = h->plt_offset / PLT_ENTRY_SIZE - 1; + + /* Get the offset into the .got table of the entry that + corresponds to this function. Each .got entry is 4 bytes. + The first three are reserved. */ + got_offset = (plt_index + 3) * 4; + + /* Fill in the entry in the procedure linkage table. */ + memcpy (splt->contents + h->plt_offset, elf_m68k_plt_entry, + PLT_ENTRY_SIZE); + /* The offset is relative to the first extension word. */ + bfd_put_32 (output_bfd, + (sgot->output_section->vma + + sgot->output_offset + + got_offset + - (splt->output_section->vma + + h->plt_offset + 2)), + splt->contents + h->plt_offset + 4); + + bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela), + splt->contents + h->plt_offset + 10); + bfd_put_32 (output_bfd, - (h->plt_offset + 16), + splt->contents + h->plt_offset + 16); + + /* Fill in the entry in the global offset table. */ + bfd_put_32 (output_bfd, + (splt->output_section->vma + + splt->output_offset + + h->plt_offset + + 8), + sgot->contents + got_offset); + + /* Fill in the entry in the .rela.plt section. */ + rela.r_offset = (sgot->output_section->vma + + sgot->output_offset + + got_offset); + rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_JMP_SLOT); + rela.r_addend = 0; + bfd_elf32_swap_reloca_out (output_bfd, &rela, + ((Elf32_External_Rela *) srela->contents + + plt_index)); + + 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); + + bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got_offset); + + rela.r_offset = (sgot->output_section->vma + + sgot->output_offset + + h->got_offset); + rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_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 symbol needs a copy reloc. Set it up. */ + + BFD_ASSERT (h->dynindx != -1 + && (h->root.type == bfd_link_hash_defined + || h->root.type == bfd_link_hash_defweak)); + + 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_68K_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 _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ + if (strcmp (h->root.root.string, "_DYNAMIC") == 0 + || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) + sym->st_shndx = SHN_ABS; + + return true; +} + +/* Finish up the dynamic sections. */ + +static boolean +elf_m68k_finish_dynamic_sections (output_bfd, info) + bfd *output_bfd; + struct bfd_link_info *info; +{ + bfd *dynobj; + asection *sgot; + asection *sdyn; + + dynobj = elf_hash_table (info)->dynobj; + + sgot = bfd_get_section_by_name (dynobj, ".got.plt"); + BFD_ASSERT (sgot != NULL); + 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; + asection *s; + + bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); + + switch (dyn.d_tag) + { + default: + break; + + case DT_PLTGOT: + name = ".got"; + goto get_vma; + case DT_JMPREL: + name = ".rela.plt"; + get_vma: + s = bfd_get_section_by_name (output_bfd, name); + BFD_ASSERT (s != NULL); + dyn.d_un.d_ptr = s->vma; + bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); + break; + + case DT_PLTRELSZ: + s = bfd_get_section_by_name (output_bfd, ".rela.plt"); + BFD_ASSERT (s != NULL); + 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); + break; + + case DT_RELASZ: + /* My reading of the SVR4 ABI indicates that the + procedure linkage table relocs (DT_JMPREL) should be + included in the overall relocs (DT_RELA). This is + what Solaris does. However, UnixWare can not handle + that case. Therefore, we override the DT_RELASZ entry + here to make it not include the JMPREL relocs. Since + the linker script arranges for .rela.plt to follow all + other relocation sections, we don't have to worry + about changing the DT_RELA entry. */ + /* FIXME: This comment is from elf32-i386.c, what about + the SVR4/m68k implementations? */ + s = bfd_get_section_by_name (output_bfd, ".rela.plt"); + if (s != NULL) + { + 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); + break; + } + } + + /* Fill in the first entry in the procedure linkage table. */ + if (splt->_raw_size > 0) + { + memcpy (splt->contents, elf_m68k_plt0_entry, PLT_ENTRY_SIZE); + bfd_put_32 (output_bfd, + (sgot->output_section->vma + + sgot->output_offset + 4 + - (splt->output_section->vma + 2)), + splt->contents + 4); + bfd_put_32 (output_bfd, + (sgot->output_section->vma + + sgot->output_offset + 8 + - (splt->output_section->vma + 10)), + splt->contents + 12); + } + + elf_section_data (splt->output_section)->this_hdr.sh_entsize + = PLT_ENTRY_SIZE; + } + + /* Fill in the first three entries in the global offset table. */ + 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); + bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4); + bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8); + } + + elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; + + return true; +} + +#define TARGET_BIG_SYM bfd_elf32_m68k_vec +#define TARGET_BIG_NAME "elf32-m68k" +#define ELF_MACHINE_CODE EM_68K +#define ELF_MAXPAGESIZE 0x2000 +#define elf_backend_create_dynamic_sections \ + elf_m68k_create_dynamic_sections +#define elf_backend_check_relocs elf_m68k_check_relocs +#define elf_backend_adjust_dynamic_symbol \ + elf_m68k_adjust_dynamic_symbol +#define elf_backend_size_dynamic_sections \ + elf_m68k_size_dynamic_sections +#define elf_backend_relocate_section elf_m68k_relocate_section +#define elf_backend_finish_dynamic_symbol \ + elf_m68k_finish_dynamic_symbol +#define elf_backend_finish_dynamic_sections \ + elf_m68k_finish_dynamic_sections + +#include "elf32-target.h" diff --git a/bfd/elf32-sparc.c b/bfd/elf32-sparc.c index 3d007c4be9..9bf032fd14 100644 --- a/bfd/elf32-sparc.c +++ b/bfd/elf32-sparc.c @@ -102,7 +102,7 @@ static reloc_howto_type elf_sparc_howto_table[] = HOWTO(R_SPARC_13, 0,2,13,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc,"R_SPARC_13", false,0,0x00001fff,true), HOWTO(R_SPARC_LO10, 0,2,10,false,0,complain_overflow_dont, bfd_elf_generic_reloc,"R_SPARC_LO10", false,0,0x000003ff,true), HOWTO(R_SPARC_GOT10, 0,2,10,false,0,complain_overflow_dont, bfd_elf_generic_reloc,"R_SPARC_GOT10", false,0,0x000003ff,true), - HOWTO(R_SPARC_GOT13, 0,2,13,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc,"R_SPARC_GOT13", false,0,0x00001fff,true), + HOWTO(R_SPARC_GOT13, 0,2,13,false,0,complain_overflow_signed, bfd_elf_generic_reloc,"R_SPARC_GOT13", false,0,0x00001fff,true), HOWTO(R_SPARC_GOT22, 10,2,22,false,0,complain_overflow_dont, bfd_elf_generic_reloc,"R_SPARC_GOT22", false,0,0x003fffff,true), HOWTO(R_SPARC_PC10, 0,2,10,true, 0,complain_overflow_dont, bfd_elf_generic_reloc,"R_SPARC_PC10", false,0,0x000003ff,true), HOWTO(R_SPARC_PC22, 10,2,22,true, 0,complain_overflow_bitfield,bfd_elf_generic_reloc,"R_SPARC_PC22", false,0,0x003fffff,true), @@ -573,21 +573,22 @@ elf32_sparc_adjust_dynamic_symbol (info, h) 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->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 - && (h->root.type == bfd_link_hash_defined - || h->root.type == bfd_link_hash_defweak) - && (bfd_get_flavour (h->root.u.def.section->owner) - == bfd_target_elf_flavour) - && (elf_elfheader (h->root.u.def.section->owner)->e_type - == ET_DYN) - && h->root.u.def.section->output_section == NULL))); + BFD_ASSERT (dynobj != NULL); + BFD_ASSERT ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) + || ((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 + && (h->root.type == bfd_link_hash_defined + || h->root.type == bfd_link_hash_defweak) + && (h->root.u.def.section->owner == NULL + || ((elf_elfheader (h->root.u.def.section->owner)->e_type + == ET_DYN) + && (bfd_get_flavour (h->root.u.def.section->owner) + == bfd_target_elf_flavour) + && h->root.u.def.section->output_section == NULL)))); /* If this is a function, put it in the procedure linkage table. We will fill in the contents of the procedure linkage table later