* elf-bfd.h (elf_backend_data): Remove use_rela_p. Add
may_use_rel_p, may_use_rela_p, default_use_rela_p. (bfd_elf_section_data): Add use_rela_p. * elf.c (bfd_section_from_shdr): Set use_rela_p appropriately. (_bfd_elf_new_section_hook): Likewise. (elf_fake_sections): Use may_use_rela_p, etc., instead of use_rela_p. (_bfd_elf_copy_private_section_data): Copy use_rela_p. * elfcode.h (write_relocs): Determine whether or not use rela relocs based on the relocation section header. * elflink.c (_bfd_elf_create_dynamic_sections): Use default_use_rela_p instead of use_rela_p. * elfxx-target.h (elf_backend_may_use_relp): New macro. (elf_backend_may_use_rela_p): Likewise. (elf_backend_default_use_rela_p): Likewise. (elfNN_bed): Use them.
This commit is contained in:
Mark Mitchell
parent
3fe702fddf
commit
bf572ba0b9
6 changed files with 96 additions and 22 deletions
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@ -1,3 +1,22 @@
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1999-05-31 Mark Mitchell <mark@codesourcery.com>
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* elf-bfd.h (elf_backend_data): Remove use_rela_p. Add
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may_use_rel_p, may_use_rela_p, default_use_rela_p.
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(bfd_elf_section_data): Add use_rela_p.
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* elf.c (bfd_section_from_shdr): Set use_rela_p appropriately.
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(_bfd_elf_new_section_hook): Likewise.
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(elf_fake_sections): Use may_use_rela_p, etc., instead of
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use_rela_p.
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(_bfd_elf_copy_private_section_data): Copy use_rela_p.
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* elfcode.h (write_relocs): Determine whether or not use rela
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relocs based on the relocation section header.
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* elflink.c (_bfd_elf_create_dynamic_sections): Use default_use_rela_p
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instead of use_rela_p.
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* elfxx-target.h (elf_backend_may_use_relp): New macro.
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(elf_backend_may_use_rela_p): Likewise.
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(elf_backend_default_use_rela_p): Likewise.
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(elfNN_bed): Use them.
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Wed Jun 2 12:38:49 1999 Miodrag Vallat <miodrag@multimania.com>
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* hosts/alphalinux.h (TRAD_CORE_EXTRA_SIZE_ALLOWED): Expand to 4096.
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@ -255,11 +255,6 @@ struct elf_size_info {
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struct elf_backend_data
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{
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/* Whether the backend uses REL or RELA relocations. FIXME: some
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ELF backends use both. When we need to support one, this whole
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approach will need to be changed. */
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int use_rela_p;
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/* The architecture for this backend. */
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enum bfd_architecture arch;
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@ -540,6 +535,23 @@ struct elf_backend_data
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bfd_vma got_header_size;
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bfd_vma plt_header_size;
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/* Whether the backend may use REL relocations. (Some backends use
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both REL and RELA relocations, and this flag is set for those
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backends.) */
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unsigned may_use_rel_p : 1;
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/* Whether the backend may use RELA relocations. (Some backends use
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both REL and RELA relocations, and this flag is set for those
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backends.) */
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unsigned may_use_rela_p : 1;
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/* Whether the default relocation type is RELA. If a backend with
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this flag set wants REL relocations for a particular section,
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it must note that explicitly. Similarly, if this flag is clear,
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and the backend wants RELA relocations for a particular
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section. */
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unsigned default_use_rela_p : 1;
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unsigned want_got_plt : 1;
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unsigned plt_readonly : 1;
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unsigned want_plt_sym : 1;
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@ -582,6 +594,8 @@ struct bfd_elf_section_data
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PTR stab_info;
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/* A pointer available for the processor specific ELF backend. */
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PTR tdata;
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/* Nonzero if this section uses RELA relocations, rather than REL. */
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unsigned int use_rela_p:1;
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};
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#define elf_section_data(sec) ((struct bfd_elf_section_data*)sec->used_by_bfd)
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22
bfd/elf.c
22
bfd/elf.c
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@ -1265,6 +1265,10 @@ bfd_section_from_shdr (abfd, shindex)
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target_sect->flags |= SEC_RELOC;
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target_sect->relocation = NULL;
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target_sect->rel_filepos = hdr->sh_offset;
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/* In the section to which the relocations apply, mark whether
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its relocations are of the REL or RELA variety. */
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elf_section_data (target_sect)->use_rela_p
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= (hdr->sh_type == SHT_RELA);
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abfd->flags |= HAS_RELOC;
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return true;
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}
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@ -1329,6 +1333,11 @@ _bfd_elf_new_section_hook (abfd, sec)
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return false;
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sec->used_by_bfd = (PTR) sdata;
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memset (sdata, 0, sizeof (*sdata));
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/* Indicate whether or not this section should use RELA relocations. */
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sdata->use_rela_p
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= get_elf_backend_data (abfd)->default_use_rela_p;
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return true;
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}
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@ -1491,13 +1500,13 @@ elf_fake_sections (abfd, asect, failedptrarg)
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this_hdr->sh_entsize = bed->s->sizeof_dyn;
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}
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else if (strncmp (asect->name, ".rela.", 6) == 0
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&& get_elf_backend_data (abfd)->use_rela_p)
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&& get_elf_backend_data (abfd)->may_use_rela_p)
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{
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this_hdr->sh_type = SHT_RELA;
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this_hdr->sh_entsize = bed->s->sizeof_rela;
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}
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else if (strncmp (asect->name, ".rel.", 5) == 0
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&& ! get_elf_backend_data (abfd)->use_rela_p)
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&& get_elf_backend_data (abfd)->may_use_rel_p)
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{
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this_hdr->sh_type = SHT_REL;
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this_hdr->sh_entsize = bed->s->sizeof_rel;
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@ -1558,19 +1567,15 @@ elf_fake_sections (abfd, asect, failedptrarg)
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this_hdr->sh_flags |= SHF_EXECINSTR;
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/* Check for processor-specific section types. */
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{
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struct elf_backend_data *bed = get_elf_backend_data (abfd);
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if (bed->elf_backend_fake_sections)
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(*bed->elf_backend_fake_sections) (abfd, this_hdr, asect);
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}
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/* If the section has relocs, set up a section header for the
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SHT_REL[A] section. */
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if ((asect->flags & SEC_RELOC) != 0)
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{
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Elf_Internal_Shdr *rela_hdr;
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int use_rela_p = get_elf_backend_data (abfd)->use_rela_p;
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int use_rela_p = elf_section_data (asect)->use_rela_p;
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char *name;
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rela_hdr = &elf_section_data (asect)->rel_hdr;
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@ -3837,6 +3842,9 @@ _bfd_elf_copy_private_section_data (ibfd, isec, obfd, osec)
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|| ihdr->sh_type == SHT_GNU_verdef)
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ohdr->sh_info = ihdr->sh_info;
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elf_section_data (osec)->use_rela_p
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= elf_section_data (isec)->use_rela_p;
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return true;
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}
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@ -729,7 +729,7 @@ write_relocs (abfd, sec, data)
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Elf_External_Rela *outbound_relocas;
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Elf_External_Rel *outbound_relocs;
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unsigned int idx;
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int use_rela_p = get_elf_backend_data (abfd)->use_rela_p;
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int use_rela_p;
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asymbol *last_sym = 0;
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int last_sym_idx = 0;
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@ -757,6 +757,16 @@ write_relocs (abfd, sec, data)
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return;
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}
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/* Figure out whether the relocations are RELA or REL relocations. */
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if (rela_hdr->sh_type == SHT_RELA)
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use_rela_p = true;
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else if (rela_hdr->sh_type == SHT_REL)
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use_rela_p = false;
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else
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/* Every relocation section should be either an SHT_RELA or an
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SHT_REL section. */
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abort ();
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/* orelocation has the data, reloc_count has the count... */
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if (use_rela_p)
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{
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@ -147,7 +147,8 @@ _bfd_elf_create_dynamic_sections (abfd, info)
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return false;
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}
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s = bfd_make_section (abfd, bed->use_rela_p ? ".rela.plt" : ".rel.plt");
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s = bfd_make_section (abfd,
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bed->default_use_rela_p ? ".rela.plt" : ".rel.plt");
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if (s == NULL
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|| ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
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|| ! bfd_set_section_alignment (abfd, s, ptralign))
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@ -180,7 +181,9 @@ _bfd_elf_create_dynamic_sections (abfd, info)
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copy relocs. */
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if (! info->shared)
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{
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s = bfd_make_section (abfd, bed->use_rela_p ? ".rela.bss" : ".rel.bss");
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s = bfd_make_section (abfd,
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(bed->default_use_rela_p
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? ".rela.bss" : ".rel.bss"));
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if (s == NULL
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|| ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
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|| ! bfd_set_section_alignment (abfd, s, ptralign))
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@ -294,6 +294,28 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#define elf_backend_post_process_headers NULL
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#endif
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/* Previously, backends could only use SHT_REL or SHT_RELA relocation
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sections, but not both. They defined USE_REL to indicate SHT_REL
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sections, and left it undefined to indicated SHT_RELA sections.
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For backwards compatibility, we still support this usage. */
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#ifndef USE_REL
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#define USE_REL 0
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#else
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#undef USE_REL
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#define USE_REL 1
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#endif
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/* Use these in new code. */
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#ifndef elf_backend_may_use_rel_p
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#define elf_backend_may_use_rel_p USE_REL
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#endif
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#ifndef elf_backend_may_use_rela_p
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#define elf_backend_may_use_rela_p !USE_REL
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#endif
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#ifndef elf_backend_default_use_rela_p
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#define elf_backend_default_use_rela_p !USE_REL
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#endif
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#ifndef ELF_MACHINE_ALT1
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#define ELF_MACHINE_ALT1 0
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#endif
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@ -310,11 +332,6 @@ extern const struct elf_size_info _bfd_elfNN_size_info;
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static CONST struct elf_backend_data elfNN_bed =
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{
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#ifdef USE_REL
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0, /* use_rela_p */
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#else
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1, /* use_rela_p */
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#endif
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ELF_ARCH, /* arch */
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ELF_MACHINE_CODE, /* elf_machine_code */
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ELF_MAXPAGESIZE, /* maxpagesize */
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@ -355,6 +372,9 @@ static CONST struct elf_backend_data elfNN_bed =
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elf_backend_got_symbol_offset,
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elf_backend_got_header_size,
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elf_backend_plt_header_size,
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elf_backend_may_use_rel_p,
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elf_backend_may_use_rela_p,
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elf_backend_default_use_rela_p,
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elf_backend_want_got_plt,
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elf_backend_plt_readonly,
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elf_backend_want_plt_sym,
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