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From Kazumoto Kojima <kkojima@kk.info.kanagawa-u.ac.jp>:
* elf32-mips.c (struct mips_elf_link_hash_table): Add new fields use_rld_obj_head and rld_value. (mips_elf_link_hash_table_create): Initialize new fields. (mips_elf_add_symbol_hook): Mark __rld_obj_head symbol as dynamic. (mips_elf_create_dynamic_sections): Create .rld_map section. If __rld_obj_head symbol not seen, create an __rld_map symbol. (mips_elf_size_dynamic_sections): Make space in .rld_map section. Create a DT_MIPS_RLD_MAP entry rather than a DT_DEBUG entry. (mips_elf_finish_dynamic_symbol): Save value of __rld_map or __rld_obj_head symbol. (mips_elf_finish_dynamic_sections): Handle DT_MIPS_RLD_MAP.
This commit is contained in:
Ian Lance Taylor
parent
719de0ea8c
commit
eb52b9dc1d
@ -1,3 +1,19 @@
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Tue Jul 9 12:21:54 1996 Ian Lance Taylor <ian@cygnus.com>
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From Kazumoto Kojima <kkojima@kk.info.kanagawa-u.ac.jp>:
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* elf32-mips.c (struct mips_elf_link_hash_table): Add new fields
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use_rld_obj_head and rld_value.
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(mips_elf_link_hash_table_create): Initialize new fields.
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(mips_elf_add_symbol_hook): Mark __rld_obj_head symbol as
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dynamic.
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(mips_elf_create_dynamic_sections): Create .rld_map section. If
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__rld_obj_head symbol not seen, create an __rld_map symbol.
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(mips_elf_size_dynamic_sections): Make space in .rld_map section.
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Create a DT_MIPS_RLD_MAP entry rather than a DT_DEBUG entry.
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(mips_elf_finish_dynamic_symbol): Save value of __rld_map or
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__rld_obj_head symbol.
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(mips_elf_finish_dynamic_sections): Handle DT_MIPS_RLD_MAP.
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Mon Jul 8 16:18:03 1996 Ian Lance Taylor <ian@cygnus.com>
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* elf32-mips.c (mips_reloc_map): Remove BFD_RELOC_32_PCREL entry.
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114
bfd/elf32-mips.c
114
bfd/elf32-mips.c
@ -2697,6 +2697,11 @@ struct mips_elf_link_hash_table
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bfd_size_type procedure_count;
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/* The size of the .compact_rel section (if SGI_COMPAT). */
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bfd_size_type compact_rel_size;
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/* This flag indicates that the value of DT_MIPS_RLD_MAP dynamic
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entry is set to the address of __rld_obj_head as in Irix 5. */
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boolean use_rld_obj_head;
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/* This is the value of the __rld_map or __rld_obj_head symbol. */
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bfd_vma rld_value;
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};
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/* Look up an entry in a MIPS ELF linker hash table. */
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@ -2784,6 +2789,8 @@ mips_elf_link_hash_table_create (abfd)
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ret->dynsym_sec_strindex[i] = (bfd_size_type) -1;
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ret->procedure_count = 0;
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ret->compact_rel_size = 0;
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ret->use_rld_obj_head = false;
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ret->rld_value = 0;
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return &ret->root.root;
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}
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@ -2878,6 +2885,31 @@ mips_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp)
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break;
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}
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if (SGI_COMPAT (abfd)
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&& ! info->shared
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&& info->hash->creator == abfd->xvec
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&& strcmp (*namep, "__rld_obj_head") == 0)
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{
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struct elf_link_hash_entry *h;
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/* Mark __rld_obj_head as dynamic. */
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h = NULL;
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if (! (_bfd_generic_link_add_one_symbol
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(info, abfd, *namep, BSF_GLOBAL, *secp,
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(bfd_vma) *valp, (const char *) NULL, false,
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get_elf_backend_data (abfd)->collect,
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(struct bfd_link_hash_entry **) &h)))
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return false;
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h->elf_link_hash_flags &=~ ELF_LINK_NON_ELF;
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h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
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h->type = STT_OBJECT;
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if (! bfd_elf32_link_record_dynamic_symbol (info, h))
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return false;
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mips_elf_hash_table (info)->use_rld_obj_head = true;
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}
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return true;
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}
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@ -4651,6 +4683,17 @@ mips_elf_create_dynamic_sections (abfd, info)
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return false;
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}
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if (SGI_COMPAT (abfd)
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&& !info->shared
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&& bfd_get_section_by_name (abfd, ".rld_map") == NULL)
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{
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s = bfd_make_section (abfd, ".rld_map");
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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, 2))
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return false;
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}
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if (SGI_COMPAT (abfd))
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{
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for (namep = mips_elf_dynsym_rtproc_names; *namep != NULL; namep++)
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@ -4707,6 +4750,30 @@ mips_elf_create_dynamic_sections (abfd, info)
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if (! bfd_elf32_link_record_dynamic_symbol (info, h))
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return false;
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if (! mips_elf_hash_table (info)->use_rld_obj_head)
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{
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/* __rld_map is a four byte word located in the .data section
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and is filled in by the rtld to contain a pointer to
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the _r_debug structure. Its symbol value will be set in
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mips_elf_finish_dynamic_symbol. */
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s = bfd_get_section_by_name (abfd, ".rld_map");
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BFD_ASSERT (s != NULL);
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h = NULL;
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if (! (_bfd_generic_link_add_one_symbol
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(info, abfd, "__rld_map", BSF_GLOBAL, s,
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(bfd_vma) 0, (const char *) NULL, false,
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get_elf_backend_data (abfd)->collect,
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(struct bfd_link_hash_entry **) &h)))
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return false;
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h->elf_link_hash_flags &=~ ELF_LINK_NON_ELF;
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h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
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h->type = STT_OBJECT;
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if (! bfd_elf32_link_record_dynamic_symbol (info, h))
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return false;
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}
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}
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return true;
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@ -5238,6 +5305,14 @@ mips_elf_size_dynamic_sections (output_bfd, info)
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of .text section. So put a dummy. XXX */
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s->_raw_size += MIPS_FUNCTION_STUB_SIZE;
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}
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else if (! info->shared
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&& ! mips_elf_hash_table (info)->use_rld_obj_head
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&& strncmp (name, ".rld_map", 8) == 0)
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{
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/* We add a room for __rld_map. It will be filled in by the
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rtld to contain a pointer to the _r_debug structure. */
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s->_raw_size += 4;
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}
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else if (SGI_COMPAT (output_bfd)
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&& strncmp (name, ".compact_rel", 12) == 0)
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s->_raw_size += mips_elf_hash_table (info)->compact_rel_size;
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@ -5280,8 +5355,16 @@ mips_elf_size_dynamic_sections (output_bfd, info)
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dynamic linker and used by the debugger. */
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if (! info->shared)
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{
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if (! bfd_elf32_add_dynamic_entry (info, DT_DEBUG, 0))
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return false;
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if (SGI_COMPAT (output_bfd))
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{
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/* SGI object has the equivalence of DT_DEBUG in the
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DT_MIPS_RLD_MAP entry. */
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if (! bfd_elf32_add_dynamic_entry (info, DT_MIPS_RLD_MAP, 0))
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return false;
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}
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else
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if (! bfd_elf32_add_dynamic_entry (info, DT_DEBUG, 0))
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return false;
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}
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if (reltext)
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@ -5591,6 +5674,28 @@ mips_elf_finish_dynamic_symbol (output_bfd, info, h, sym)
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}
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}
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if (SGI_COMPAT (output_bfd)
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&& ! info->shared)
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{
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if (! mips_elf_hash_table (info)->use_rld_obj_head
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&& strcmp (name, "__rld_map") == 0)
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{
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asection *s = bfd_get_section_by_name (dynobj, ".rld_map");
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BFD_ASSERT (s != NULL);
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sym->st_value = s->output_section->vma + s->output_offset;
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bfd_put_32 (output_bfd, (bfd_vma) 0, s->contents);
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if (mips_elf_hash_table (info)->rld_value == 0)
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mips_elf_hash_table (info)->rld_value = sym->st_value;
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}
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else if (mips_elf_hash_table (info)->use_rld_obj_head
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&& strcmp (name, "__rld_obj_head") == 0)
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{
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asection *s = bfd_get_section_by_name (dynobj, ".rld_map");
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BFD_ASSERT (s != NULL);
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mips_elf_hash_table (info)->rld_value = sym->st_value;
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}
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}
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return true;
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}
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@ -5755,6 +5860,11 @@ mips_elf_finish_dynamic_sections (output_bfd, info)
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bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
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break;
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case DT_MIPS_RLD_MAP:
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dyn.d_un.d_ptr = mips_elf_hash_table (info)->rld_value;
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bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
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break;
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}
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}
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}
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