diff options
Diffstat (limited to 'bfd')
-rw-r--r-- | bfd/ChangeLog | 22 | ||||
-rw-r--r-- | bfd/elf32-ppc.c | 120 |
2 files changed, 86 insertions, 56 deletions
diff --git a/bfd/ChangeLog b/bfd/ChangeLog index b95b908..105ef25 100644 --- a/bfd/ChangeLog +++ b/bfd/ChangeLog @@ -1,3 +1,25 @@ +2006-03-02 Richard Sandiford <richard@codesourcery.com> + + * elf32-ppc.c (ppc_elf_plt_type): New enumeration. + (ppc_elf_link_hash_table): Replace old_got and new_got with + plt_type and can_use_new_plt. + (ppc_elf_create_dynamic_sections): Add SEC_HAS_CONTENTS, + SEC_LOAD and SEC_READONLY to the VxWorks .plt flags. + (ppc_elf_check_relocs): Set can_use_new_plt instead of new_plt. + Move from plt_type == PLT_UNSET to PLT_OLD instead of setting old_plt. + (ppc_elf_select_plt_layout): Move from plt_type == PLT_UNSET to + either plt_type == PLT_OLD or plt_type == PLT_NEW. Assert that + this function should not be called for VxWorks targets. + (ppc_elf_tls_setup): Use plt_type instead of old_got. + (allocate_got): Likewise. Rearrange so that max_before_header + is only used for PLT_OLD and PLT_NEW. + (allocate_dynrelocs): Use plt_type instead of old_got and is_vxworks. + (ppc_elf_size_dynamic_sections): Likewise. + (ppc_elf_relax_section): Likewise. + (ppc_elf_relocate_section): Likewise. + (ppc_elf_finish_dynamic_symbol): Likewise. + (ppc_elf_vxworks_link_hash_table_create): Initialize plt_type. + 2006-02-28 Richard Sandiford <richard@codesourcery.com> * elf32-i386.c (elf_i386_link_hash_table): Add next_tls_desc_index. diff --git a/bfd/elf32-ppc.c b/bfd/elf32-ppc.c index ec407fd..9520755 100644 --- a/bfd/elf32-ppc.c +++ b/bfd/elf32-ppc.c @@ -2313,6 +2313,13 @@ struct ppc_elf_link_hash_entry #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent)) +enum ppc_elf_plt_type { + PLT_UNSET, + PLT_OLD, + PLT_NEW, + PLT_VXWORKS +}; + /* PPC ELF linker hash table. */ struct ppc_elf_link_hash_table @@ -2349,9 +2356,11 @@ struct ppc_elf_link_hash_table /* Non-zero if allocating the header left a gap. */ unsigned int got_gap; - /* Whether to use new plt/got layout or not. */ - unsigned int new_plt:1; - unsigned int old_plt:1; + /* The type of PLT we have chosen to use. */ + enum ppc_elf_plt_type plt_type; + + /* Whether we can use the new PLT layout. */ + unsigned int can_use_new_plt:1; /* Set if we should emit symbols for stubs. */ unsigned int emit_stub_syms:1; @@ -2559,6 +2568,9 @@ ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) abort (); flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED; + if (htab->plt_type == PLT_VXWORKS) + /* The VxWorks PLT is a loaded section with contents. */ + flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY; return bfd_set_section_flags (abfd, s, flags); } @@ -3245,7 +3257,7 @@ ppc_elf_check_relocs (bfd *abfd, case R_PPC_REL16_LO: case R_PPC_REL16_HI: case R_PPC_REL16_HA: - htab->new_plt = 1; + htab->can_use_new_plt = 1; break; /* These are just markers. */ @@ -3273,8 +3285,8 @@ ppc_elf_check_relocs (bfd *abfd, /* This refers only to functions defined in the shared library. */ case R_PPC_LOCAL24PC: - if (h && h == htab->elf.hgot) - htab->old_plt = 1; + if (h && h == htab->elf.hgot && htab->plt_type == PLT_UNSET) + htab->plt_type = PLT_OLD; break; /* This relocation describes the C++ object vtable hierarchy. @@ -3315,7 +3327,7 @@ ppc_elf_check_relocs (bfd *abfd, && got2 != NULL && (sec->flags & SEC_CODE) != 0 && (info->shared || info->pie) - && !htab->old_plt) + && htab->plt_type == PLT_UNSET) { /* Old -fPIC gcc code has .long LCTOC1-LCFx just before the start of a function, which assembles to a REL32 @@ -3328,7 +3340,7 @@ ppc_elf_check_relocs (bfd *abfd, s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec, r_symndx); if (s == got2) - htab->old_plt = 1; + htab->plt_type = PLT_OLD; } /* fall through */ @@ -3338,9 +3350,9 @@ ppc_elf_check_relocs (bfd *abfd, case R_PPC_REL14_BRNTAKEN: if (h == NULL) break; - if (h == htab->elf.hgot) + if (h == htab->elf.hgot && htab->plt_type == PLT_UNSET) { - htab->old_plt = 1; + htab->plt_type = PLT_OLD; break; } /* fall through */ @@ -3600,22 +3612,16 @@ ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED, flagword flags; htab = ppc_elf_hash_table (info); - if (force_old_plt || !htab->new_plt) - htab->old_plt = 1; + + if (htab->plt_type == PLT_UNSET) + htab->plt_type = (force_old_plt || !htab->can_use_new_plt + ? PLT_OLD : PLT_NEW); htab->emit_stub_syms = emit_stub_syms; - if (htab->is_vxworks) - { - /* The VxWorks PLT is a loaded section with contents. */ - flags = SEC_ALLOC | SEC_CODE | SEC_IN_MEMORY | SEC_LINKER_CREATED - | SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY; + BFD_ASSERT (htab->plt_type != PLT_VXWORKS); - if (htab->plt != NULL - && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags)) - return -1; - } - else if (!htab->old_plt) + if (htab->plt_type == PLT_NEW) { flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED); @@ -3637,7 +3643,7 @@ ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED, && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0)) return -1; } - return !htab->old_plt; + return htab->plt_type == PLT_NEW; } /* Return the section that should be marked against GC for a given @@ -3825,7 +3831,7 @@ ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info) struct ppc_elf_link_hash_table *htab; htab = ppc_elf_hash_table (info); - if (!htab->old_plt + if (htab->plt_type == PLT_NEW && htab->plt != NULL && htab->plt->output_section != NULL) { @@ -4269,31 +4275,32 @@ static bfd_vma allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need) { bfd_vma where; - unsigned int max_before_header = 32768; - - if (htab->old_plt) - max_before_header = 32764; + unsigned int max_before_header; - if (htab->is_vxworks) + if (htab->plt_type == PLT_VXWORKS) { where = htab->got->size; htab->got->size += need; } - else if (need <= htab->got_gap) - { - where = max_before_header - htab->got_gap; - htab->got_gap -= need; - } else { - if (htab->got->size + need > max_before_header - && htab->got->size <= max_before_header) + max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764; + if (need <= htab->got_gap) { - htab->got_gap = max_before_header - htab->got->size; - htab->got->size = max_before_header + htab->got_header_size; + where = max_before_header - htab->got_gap; + htab->got_gap -= need; + } + else + { + if (htab->got->size + need > max_before_header + && htab->got->size <= max_before_header) + { + htab->got_gap = max_before_header - htab->got->size; + htab->got->size = max_before_header + htab->got_header_size; + } + where = htab->got->size; + htab->got->size += need; } - where = htab->got->size; - htab->got->size += need; } return where; } @@ -4340,7 +4347,7 @@ allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf) { asection *s = htab->plt; - if (!(htab->old_plt || htab->is_vxworks)) + if (htab->plt_type == PLT_NEW) { if (!doneone) { @@ -4404,7 +4411,7 @@ allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf) s->size += htab->plt_entry_size; /* After the 8192nd entry, room for two entries is allocated. */ - if (!htab->is_vxworks + if (htab->plt_type == PLT_OLD && (s->size - htab->plt_initial_entry_size) / htab->plt_entry_size > PLT_NUM_SINGLE_ENTRIES) @@ -4418,7 +4425,7 @@ allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf) { htab->relplt->size += sizeof (Elf32_External_Rela); - if (htab->is_vxworks) + if (htab->plt_type == PLT_VXWORKS) { /* Allocate space for the unloaded relocations. */ if (!info->shared) @@ -4659,9 +4666,9 @@ ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, } } - if (htab->old_plt) + if (htab->plt_type == PLT_OLD) htab->got_header_size = 16; - else + else if (htab->plt_type == PLT_NEW) htab->got_header_size = 12; /* Set up .got offsets for local syms, and space for local dynamic @@ -4775,7 +4782,7 @@ ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, /* Allocate space for global sym dynamic relocs. */ elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info); - if (htab->got != NULL && !htab->is_vxworks) + if (htab->got != NULL && htab->plt_type != PLT_VXWORKS) { unsigned int g_o_t = 32768; @@ -4786,7 +4793,7 @@ ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, if (htab->got->size <= 32768) { g_o_t = htab->got->size; - if (htab->old_plt) + if (htab->plt_type == PLT_OLD) g_o_t += 4; htab->got->size += htab->got_header_size; } @@ -5122,7 +5129,7 @@ ppc_elf_relax_section (bfd *abfd, if (ent != NULL) { - if (!htab->old_plt) + if (htab->plt_type == PLT_NEW) { tsec = htab->glink; toff = ent->glink_offset; @@ -6337,7 +6344,7 @@ ppc_elf_relocate_section (bfd *output_bfd, { struct plt_entry *ent = find_plt_ent (h, got2, addend); - if (!htab->old_plt) + if (htab->plt_type == PLT_NEW) relocation = (htab->glink->output_section->vma + htab->glink->output_offset + ent->glink_offset); @@ -6427,7 +6434,7 @@ ppc_elf_relocate_section (bfd *output_bfd, } unresolved_reloc = FALSE; - if (!htab->old_plt) + if (htab->plt_type == PLT_NEW) relocation = (htab->glink->output_section->vma + htab->glink->output_offset + ent->glink_offset); @@ -6747,20 +6754,20 @@ ppc_elf_finish_dynamic_symbol (bfd *output_bfd, bfd_byte *loc; bfd_vma reloc_index; - if (!(htab->old_plt || htab->is_vxworks)) + if (htab->plt_type == PLT_NEW) reloc_index = ent->plt.offset / 4; else { reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size) / htab->plt_slot_size); if (reloc_index > PLT_NUM_SINGLE_ENTRIES - && !htab->is_vxworks) + && htab->plt_type == PLT_OLD) reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2; } /* This symbol has an entry in the procedure linkage table. Set it up. */ - if (htab->is_vxworks) + if (htab->plt_type == PLT_VXWORKS) { bfd_vma got_offset; const bfd_vma *plt_entry; @@ -6894,7 +6901,7 @@ ppc_elf_finish_dynamic_symbol (bfd *output_bfd, rela.r_offset = (htab->plt->output_section->vma + htab->plt->output_offset + ent->plt.offset); - if (htab->old_plt) + if (htab->plt_type == PLT_OLD) { /* We don't need to fill in the .plt. The ppc dynamic linker will fill it in. */ @@ -6932,7 +6939,7 @@ ppc_elf_finish_dynamic_symbol (bfd *output_bfd, doneone = TRUE; } - if (!htab->old_plt) + if (htab->plt_type == PLT_NEW) { bfd_vma plt; unsigned char *p; @@ -7154,7 +7161,7 @@ ppc_elf_finish_dynamic_sections (bfd *output_bfd, bfd_vma val; p += htab->elf.hgot->root.u.def.value; - if (htab->old_plt && !htab->is_vxworks) + if (htab->plt_type == PLT_OLD) bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, p - 4); val = 0; @@ -7526,6 +7533,7 @@ ppc_elf_vxworks_link_hash_table_create (bfd *abfd) struct ppc_elf_link_hash_table *htab = (struct ppc_elf_link_hash_table *)ret; htab->is_vxworks = 1; + htab->plt_type = PLT_VXWORKS; htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE; htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE; htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE; |