diff options
Diffstat (limited to 'bfd/elf32-frv.c')
| -rw-r--r-- | bfd/elf32-frv.c | 444 |
1 files changed, 270 insertions, 174 deletions
diff --git a/bfd/elf32-frv.c b/bfd/elf32-frv.c index 1758e27591fa1..97cce0b7629ec 100644 --- a/bfd/elf32-frv.c +++ b/bfd/elf32-frv.c @@ -1,5 +1,6 @@ /* FRV-specific support for 32-bit ELF. - Copyright 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc. + Copyright 2002, 2003, 2004, 2005, 2006, 2007 + Free Software Foundation, Inc. This file is part of BFD, the Binary File Descriptor library. @@ -17,8 +18,8 @@ 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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ -#include "bfd.h" #include "sysdep.h" +#include "bfd.h" #include "libbfd.h" #include "elf-bfd.h" #include "elf/frv.h" @@ -57,12 +58,6 @@ static bfd_boolean elf32_frv_add_symbol_hook static bfd_reloc_status_type frv_final_link_relocate PARAMS ((reloc_howto_type *, bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, bfd_vma)); -static bfd_boolean elf32_frv_gc_sweep_hook - PARAMS ((bfd *, struct bfd_link_info *, asection *, const - Elf_Internal_Rela *)); -static asection * elf32_frv_gc_mark_hook - PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *, - struct elf_link_hash_entry *, Elf_Internal_Sym *)); static bfd_boolean elf32_frv_check_relocs PARAMS ((bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *)); @@ -2595,6 +2590,26 @@ frv_reloc_type_lookup (abfd, code) return NULL; } +static reloc_howto_type * +frv_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name) +{ + unsigned int i; + + for (i = 0; + i < sizeof (elf32_frv_howto_table) / sizeof (elf32_frv_howto_table[0]); + i++) + if (elf32_frv_howto_table[i].name != NULL + && strcasecmp (elf32_frv_howto_table[i].name, r_name) == 0) + return &elf32_frv_howto_table[i]; + + if (strcasecmp (elf32_frv_vtinherit_howto.name, r_name) == 0) + return &elf32_frv_vtinherit_howto; + if (strcasecmp (elf32_frv_vtentry_howto.name, r_name) == 0) + return &elf32_frv_vtentry_howto; + + return NULL; +} + /* Set the howto pointer for an FRV ELF reloc. */ static void @@ -2728,9 +2743,6 @@ elf32_frv_relocate_section (output_bfd, info, input_bfd, input_section, int silence_segment_error = !(info->shared || info->pie); unsigned long insn; - if (info->relocatable) - return TRUE; - symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; sym_hashes = elf_sym_hashes (input_bfd); relend = relocs + input_section->reloc_count; @@ -2782,7 +2794,6 @@ elf32_frv_relocate_section (output_bfd, info, input_bfd, input_section, || r_type == R_FRV_GNU_VTENTRY) continue; - /* This is a final link. */ r_symndx = ELF32_R_SYM (rel->r_info); howto = elf32_frv_howto_table + ELF32_R_TYPE (rel->r_info); h = NULL; @@ -2801,50 +2812,38 @@ elf32_frv_relocate_section (output_bfd, info, input_bfd, input_section, } else { - h = sym_hashes [r_symndx - symtab_hdr->sh_info]; + bfd_boolean warned; + bfd_boolean unresolved_reloc; - 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; + RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, + r_symndx, symtab_hdr, sym_hashes, + h, sec, relocation, + unresolved_reloc, warned); + osec = sec; + } - name = h->root.root.string; + if (sec != NULL && elf_discarded_section (sec)) + { + /* For relocs against symbols from removed linkonce sections, + or sections discarded by a linker script, we just want the + section contents zeroed. Avoid any special processing. */ + _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset); + rel->r_info = 0; + rel->r_addend = 0; + continue; + } - if ((h->root.type == bfd_link_hash_defined - || h->root.type == bfd_link_hash_defweak)) - { - if (/* TLSMOFF forces local binding. */ - r_type != R_FRV_TLSMOFF - && ! FRVFDPIC_SYM_LOCAL (info, h)) - { - sec = NULL; - relocation = 0; - } - else - { - sec = h->root.u.def.section; - 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->unresolved_syms_in_objects == RM_IGNORE - && 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->unresolved_syms_in_objects == RM_GENERATE_ERROR - || ELF_ST_VISIBILITY (h->other))))) - return FALSE; - relocation = 0; - } - osec = sec; + if (info->relocatable) + continue; + + if (r_type != R_FRV_TLSMOFF + && h != NULL + && (h->root.type == bfd_link_hash_defined + || h->root.type == bfd_link_hash_defweak) + && !FRVFDPIC_SYM_LOCAL (info, h)) + { + osec = sec = NULL; + relocation = 0; } switch (r_type) @@ -3645,6 +3644,8 @@ elf32_frv_relocate_section (output_bfd, info, input_bfd, input_section, input_section->output_section) & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD)) { + bfd_vma offset; + if (_frvfdpic_osec_readonly_p (output_bfd, input_section ->output_section)) @@ -3655,22 +3656,27 @@ elf32_frv_relocate_section (output_bfd, info, input_bfd, input_section, name, input_bfd, input_section, rel->r_offset); return FALSE; } - _frvfdpic_add_rofixup (output_bfd, - frvfdpic_gotfixup_section - (info), - _bfd_elf_section_offset - (output_bfd, info, - input_section, rel->r_offset) - + input_section - ->output_section->vma - + input_section->output_offset, - picrel); + + offset = _bfd_elf_section_offset + (output_bfd, info, + input_section, rel->r_offset); + + if (offset != (bfd_vma)-1) + _frvfdpic_add_rofixup (output_bfd, + frvfdpic_gotfixup_section + (info), + offset + input_section + ->output_section->vma + + input_section->output_offset, + picrel); } } else if ((bfd_get_section_flags (output_bfd, input_section->output_section) & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD)) { + bfd_vma offset; + if (_frvfdpic_osec_readonly_p (output_bfd, input_section ->output_section)) @@ -3681,15 +3687,18 @@ elf32_frv_relocate_section (output_bfd, info, input_bfd, input_section, name, input_bfd, input_section, rel->r_offset); return FALSE; } - _frvfdpic_add_dyn_reloc (output_bfd, - frvfdpic_gotrel_section (info), - _bfd_elf_section_offset - (output_bfd, info, - input_section, rel->r_offset) - + input_section - ->output_section->vma - + input_section->output_offset, - r_type, dynindx, addend, picrel); + + offset = _bfd_elf_section_offset + (output_bfd, info, + input_section, rel->r_offset); + + if (offset != (bfd_vma)-1) + _frvfdpic_add_dyn_reloc (output_bfd, + frvfdpic_gotrel_section (info), + offset + input_section + ->output_section->vma + + input_section->output_offset, + r_type, dynindx, addend, picrel); } else addend += frvfdpic_got_section (info)->output_section->vma; @@ -3770,25 +3779,27 @@ elf32_frv_relocate_section (output_bfd, info, input_bfd, input_section, } if (!h || h->root.type != bfd_link_hash_undefweak) { - _frvfdpic_add_rofixup (output_bfd, - frvfdpic_gotfixup_section - (info), - _bfd_elf_section_offset - (output_bfd, info, - input_section, rel->r_offset) - + input_section - ->output_section->vma - + input_section->output_offset, - picrel); - if (r_type == R_FRV_FUNCDESC_VALUE) - _frvfdpic_add_rofixup - (output_bfd, - frvfdpic_gotfixup_section (info), - _bfd_elf_section_offset - (output_bfd, info, - input_section, rel->r_offset) - + input_section->output_section->vma - + input_section->output_offset + 4, picrel); + bfd_vma offset = _bfd_elf_section_offset + (output_bfd, info, + input_section, rel->r_offset); + + if (offset != (bfd_vma)-1) + { + _frvfdpic_add_rofixup (output_bfd, + frvfdpic_gotfixup_section + (info), + offset + input_section + ->output_section->vma + + input_section->output_offset, + picrel); + if (r_type == R_FRV_FUNCDESC_VALUE) + _frvfdpic_add_rofixup + (output_bfd, + frvfdpic_gotfixup_section (info), + offset + + input_section->output_section->vma + + input_section->output_offset + 4, picrel); + } } } } @@ -3798,6 +3809,8 @@ elf32_frv_relocate_section (output_bfd, info, input_bfd, input_section, input_section->output_section) & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD)) { + bfd_vma offset; + if (_frvfdpic_osec_readonly_p (output_bfd, input_section ->output_section)) @@ -3808,15 +3821,18 @@ elf32_frv_relocate_section (output_bfd, info, input_bfd, input_section, name, input_bfd, input_section, rel->r_offset); return FALSE; } - _frvfdpic_add_dyn_reloc (output_bfd, - frvfdpic_gotrel_section (info), - _bfd_elf_section_offset - (output_bfd, info, - input_section, rel->r_offset) - + input_section - ->output_section->vma - + input_section->output_offset, - r_type, dynindx, addend, picrel); + + offset = _bfd_elf_section_offset + (output_bfd, info, + input_section, rel->r_offset); + + if (offset != (bfd_vma)-1) + _frvfdpic_add_dyn_reloc (output_bfd, + frvfdpic_gotrel_section (info), + offset + input_section + ->output_section->vma + + input_section->output_offset, + r_type, dynindx, addend, picrel); } else if (osec) addend += osec->output_section->vma; @@ -4145,54 +4161,22 @@ elf32_frv_relocate_section (output_bfd, info, input_bfd, input_section, relocation. */ static asection * -elf32_frv_gc_mark_hook (sec, info, rel, h, sym) - asection *sec; - struct bfd_link_info *info ATTRIBUTE_UNUSED; - Elf_Internal_Rela *rel; - struct elf_link_hash_entry *h; - Elf_Internal_Sym *sym; +elf32_frv_gc_mark_hook (asection *sec, + struct bfd_link_info *info, + 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_FRV_GNU_VTINHERIT: - case R_FRV_GNU_VTENTRY: - break; - - default: - switch (h->root.type) - { - default: - break; - - 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; - } - } - } - else - return bfd_section_from_elf_index (sec->owner, sym->st_shndx); - - return NULL; -} - -/* Update the got entry reference counts for the section being removed. */ + switch (ELF32_R_TYPE (rel->r_info)) + { + case R_FRV_GNU_VTINHERIT: + case R_FRV_GNU_VTENTRY: + return NULL; + } -static bfd_boolean -elf32_frv_gc_sweep_hook (abfd, info, sec, relocs) - bfd *abfd ATTRIBUTE_UNUSED; - struct bfd_link_info *info ATTRIBUTE_UNUSED; - asection *sec ATTRIBUTE_UNUSED; - const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED; -{ - return TRUE; + return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); } - /* Hook called by the linker routine which adds symbols from an object file. We use it to put .comm items in .scomm, and not .comm. */ @@ -5603,7 +5587,6 @@ elf32_frvfdpic_always_size_sections (bfd *output_bfd, if (!info->relocatable) { struct elf_link_hash_entry *h; - asection *sec; /* Force a PT_GNU_STACK segment to be created. */ if (! elf_tdata (output_bfd)->stack_flags) @@ -5630,12 +5613,121 @@ elf32_frvfdpic_always_size_sections (bfd *output_bfd, h->type = STT_OBJECT; /* This one must NOT be hidden. */ } + } + + return TRUE; +} + +/* Check whether any of the relocations was optimized away, and + subtract it from the relocation or fixup count. */ +static bfd_boolean +_frvfdpic_check_discarded_relocs (bfd *abfd, asection *sec, + struct bfd_link_info *info, + + bfd_boolean *changed) +{ + Elf_Internal_Shdr *symtab_hdr; + struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; + Elf_Internal_Rela *rel, *erel; + + if ((sec->flags & SEC_RELOC) == 0 + || sec->reloc_count == 0) + return TRUE; + + symtab_hdr = &elf_tdata (abfd)->symtab_hdr; + sym_hashes = elf_sym_hashes (abfd); + sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof(Elf32_External_Sym); + if (!elf_bad_symtab (abfd)) + sym_hashes_end -= symtab_hdr->sh_info; + + rel = elf_section_data (sec)->relocs; + + /* Now examine each relocation. */ + for (erel = rel + sec->reloc_count; rel < erel; rel++) + { + struct elf_link_hash_entry *h; + unsigned long r_symndx; + struct frvfdpic_relocs_info *picrel; + struct _frvfdpic_dynamic_got_info *dinfo; + + if (ELF32_R_TYPE (rel->r_info) != R_FRV_32 + && ELF32_R_TYPE (rel->r_info) != R_FRV_FUNCDESC) + continue; + + if (_bfd_elf_section_offset (sec->output_section->owner, + info, sec, rel->r_offset) + != (bfd_vma)-1) + continue; + + 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]; + 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; + } - /* Create a stack section, and set its alignment. */ - sec = bfd_make_section (output_bfd, ".stack"); + if (h != NULL) + picrel = frvfdpic_relocs_info_for_global (frvfdpic_relocs_info (info), + abfd, h, + rel->r_addend, NO_INSERT); + else + picrel = frvfdpic_relocs_info_for_local (frvfdpic_relocs_info (info), + abfd, r_symndx, + rel->r_addend, NO_INSERT); - if (sec == NULL - || ! bfd_set_section_alignment (output_bfd, sec, 3)) + if (! picrel) + return FALSE; + + *changed = TRUE; + dinfo = frvfdpic_dynamic_got_plt_info (info); + + _frvfdpic_count_relocs_fixups (picrel, dinfo, TRUE); + if (ELF32_R_TYPE (rel->r_info) == R_FRV_32) + picrel->relocs32--; + else /* we know (ELF32_R_TYPE (rel->r_info) == R_FRV_FUNCDESC) */ + picrel->relocsfd--; + _frvfdpic_count_relocs_fixups (picrel, dinfo, FALSE); + } + + return TRUE; +} + +static bfd_boolean +frvfdpic_elf_discard_info (bfd *ibfd, + struct elf_reloc_cookie *cookie ATTRIBUTE_UNUSED, + struct bfd_link_info *info) +{ + bfd_boolean changed = FALSE; + asection *s; + bfd *obfd = NULL; + + /* Account for relaxation of .eh_frame section. */ + for (s = ibfd->sections; s; s = s->next) + if (s->sec_info_type == ELF_INFO_TYPE_EH_FRAME) + { + if (!_frvfdpic_check_discarded_relocs (ibfd, s, info, &changed)) + return FALSE; + obfd = s->output_section->owner; + } + + if (changed) + { + struct _frvfdpic_dynamic_got_plt_info gpinfo; + + memset (&gpinfo, 0, sizeof (gpinfo)); + memcpy (&gpinfo.g, frvfdpic_dynamic_got_plt_info (info), + sizeof (gpinfo.g)); + + /* Clear GOT and PLT assignments. */ + htab_traverse (frvfdpic_relocs_info (info), + _frvfdpic_reset_got_plt_entries, + NULL); + + if (!_frvfdpic_size_got_plt (obfd, &gpinfo)) return FALSE; } @@ -5718,48 +5810,45 @@ elf32_frvfdpic_relax_section (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, } static bfd_boolean -elf32_frvfdpic_modify_segment_map (bfd *output_bfd, - struct bfd_link_info *info) +elf32_frvfdpic_modify_program_headers (bfd *output_bfd, + struct bfd_link_info *info) { + struct elf_obj_tdata *tdata = elf_tdata (output_bfd); struct elf_segment_map *m; + Elf_Internal_Phdr *p; /* objcopy and strip preserve what's already there using elf32_frvfdpic_copy_private_bfd_data (). */ if (! info) return TRUE; - for (m = elf_tdata (output_bfd)->segment_map; m != NULL; m = m->next) + for (p = tdata->phdr, m = tdata->segment_map; m != NULL; m = m->next, p++) if (m->p_type == PT_GNU_STACK) break; if (m) { - asection *sec = bfd_get_section_by_name (output_bfd, ".stack"); struct elf_link_hash_entry *h; - if (sec) + /* Obtain the pointer to the __stacksize symbol. */ + h = elf_link_hash_lookup (elf_hash_table (info), "__stacksize", + FALSE, FALSE, FALSE); + if (h) { - /* Obtain the pointer to the __stacksize symbol. */ - h = elf_link_hash_lookup (elf_hash_table (info), "__stacksize", - FALSE, FALSE, FALSE); 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; + h = (struct elf_link_hash_entry *) h->root.u.i.link; BFD_ASSERT (h->root.type == bfd_link_hash_defined); + } - /* Set the section size from the symbol value. We - intentionally ignore the symbol section. */ - if (h->root.type == bfd_link_hash_defined) - sec->size = h->root.u.def.value; - else - sec->size = DEFAULT_STACK_SIZE; + /* Set the header p_memsz from the symbol value. We + intentionally ignore the symbol section. */ + if (h && h->root.type == bfd_link_hash_defined) + p->p_memsz = h->root.u.def.value; + else + p->p_memsz = DEFAULT_STACK_SIZE; - /* Add the stack section to the PT_GNU_STACK segment, - such that its size and alignment requirements make it - to the segment. */ - m->sections[m->count] = sec; - m->count++; - } + p->p_align = 8; } return TRUE; @@ -6401,6 +6490,10 @@ frv_elf_copy_private_bfd_data (ibfd, obfd) elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags; elf_flags_init (obfd) = TRUE; + + /* Copy object attributes. */ + _bfd_elf_copy_obj_attributes (ibfd, obfd); + return TRUE; } @@ -6922,7 +7015,6 @@ elf32_frv_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) #define elf_info_to_howto frv_info_to_howto_rela #define elf_backend_relocate_section elf32_frv_relocate_section #define elf_backend_gc_mark_hook elf32_frv_gc_mark_hook -#define elf_backend_gc_sweep_hook elf32_frv_gc_sweep_hook #define elf_backend_check_relocs elf32_frv_check_relocs #define elf_backend_object_p elf32_frv_object_p #define elf_backend_add_symbol_hook elf32_frv_add_symbol_hook @@ -6931,6 +7023,7 @@ elf32_frv_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) #define elf_backend_rela_normal 1 #define bfd_elf32_bfd_reloc_type_lookup frv_reloc_type_lookup +#define bfd_elf32_bfd_reloc_name_lookup frv_reloc_name_lookup #define bfd_elf32_bfd_set_private_flags frv_elf_set_private_flags #define bfd_elf32_bfd_copy_private_bfd_data frv_elf_copy_private_bfd_data #define bfd_elf32_bfd_merge_private_bfd_data frv_elf_merge_private_bfd_data @@ -6970,9 +7063,9 @@ elf32_frv_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) #undef elf_backend_always_size_sections #define elf_backend_always_size_sections \ elf32_frvfdpic_always_size_sections -#undef elf_backend_modify_segment_map -#define elf_backend_modify_segment_map \ - elf32_frvfdpic_modify_segment_map +#undef elf_backend_modify_program_headers +#define elf_backend_modify_program_headers \ + elf32_frvfdpic_modify_program_headers #undef bfd_elf32_bfd_copy_private_bfd_data #define bfd_elf32_bfd_copy_private_bfd_data \ elf32_frvfdpic_copy_private_bfd_data @@ -6996,6 +7089,9 @@ elf32_frv_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) #define elf_backend_finish_dynamic_sections \ elf32_frvfdpic_finish_dynamic_sections +#undef elf_backend_discard_info +#define elf_backend_discard_info \ + frvfdpic_elf_discard_info #undef elf_backend_can_make_relative_eh_frame #define elf_backend_can_make_relative_eh_frame \ frvfdpic_elf_use_relative_eh_frame |