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authorIan Lance Taylor <ian@airs.com>1994-10-21 22:00:18 +0000
committerIan Lance Taylor <ian@airs.com>1994-10-21 22:00:18 +0000
commit12662be4fe2722e3186c865332166ec2d6bcb5da (patch)
tree9aa0a8fa8e2243ae39ed773725d97231f80c26d0 /bfd/elf32-i386.c
parent6b55e5e3b9c8cfb439d3a11c6afbb071a927fbf8 (diff)
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Fix the ELF linker to not require an interpreter if no dynamic
objects were seen, even when linking PIC code. * libelf.h (ELF_LINK_HASH_NEEDS_PLT): Define. (struct elf_link_hash_table): Add field dynamic_sections_created. * elfcode.h (elf_link_record_dynamic_symbol): Create dynstr if it doesn't already exist. (elf_link_add_object_symbols): Create dynamic sections based on dynamic_sections_created field, not dynobj field. Don't bother to set dynobj. (elf_link_create_dynamic_sections): If dynamic sections were already created, don't do anything. If dynobj is already set, use it; otherwise, set it to the bfd argument. Don't initialize dynsymcount. Only create dynstr if it does not exist. Set dynamic_sections_created to true. (NAME(bfd_elf,size_dynamic_sections)): Skip most of this function if no dynamic objects were seen. (elf_adjust_dynamic_symbol): If a symbol has the ELF_LINK_HASH_NEEDS_PLT flag set, let the backend adjust it. (elf_bfd_final_link): Change most decisions based on dynobj to check dynamic_sections_created instead. (elf_link_output_extsym): Only handle dynamic symbols if a dynamic object was seen. * elf.c (_bfd_elf_link_hash_table_init): Initialize new field dynamic_sections_created. Set dynsymcount to 1, not 0. * elf32-i386.c (elf_i386_create_dynamic_sections): Call elf_i386_create_got_section rather than creating the .got and .got.plt sections. (elf_i386_create_got_section): New static function. (elf_i386_check_relocs): Just call elf_i386_create_got_section if a GOT table is needed, not bfd_elf32_link_create_dynamic_sections. Only create the .rel.got section, and only make space for a reloc, for a global symbol or when generating a shared object. For a R_386_PLT32 reloc, just set the ELF_LINK_HASH_NEEDS_PLT flag. (elf_i386_adjust_dynamic_symbol): Rework initial assertion to permit ELF_LINK_HASH_NEEDS_PLT non dynamic symbols. Create a procedure linkage table entry for such symbols. But, if no dynamic objects were seen, never create a PLT entry. (elf_i386_size_dynamic_sections): If no dynamic objects were seen, skip most of this function, and force the size of the .rel.got section to zero. (elf_i386_relocate_section): For a R_386_GOT32 reloc against a global symbol when no dynamic object was seen, initialize the contents of the .got section. For a R_386_GOT32 against a local symbol, only create a R_386_RELATIVE reloc when generating a shared object. Treat a R_386_PLT32 reloc against a symbol for which we did not create a PLT entry as a R_386_PC32 reloc. (elf_i386_finish_dynamic_sections): Only fiddle with the dynamic entries and the PLT if we saw a dynamic object. * elf32-sparc.c (elf_sparc_howto_table): Fix R_SPARC_PC22 by setting rightshift to 10. Fix R_SPARC_WPLT20 by setting rightshift to 2, size to 2, bitsize to 30, and dst_mask to 0x3fffffff. (elf32_sparc_create_dynamic_sections): Don't set the size of the .plt section. Call elf32_sparc_create_got_section rather than creating the .got section. (elf32_sparc_check_relocs): Call elf32_sparc_create_got_section if a GOT table is needed, not bfd_elf32_link_create_dynamic_sections. Only create the .rela.got section, and only make space for a reloc, for a global symbol or when generating a shared object. Set the alignment of the .rela.got section to 2. For a R_SPARC_WPLT30 reloc, just set the ELF_LINK_HASH_NEEDS_PLT flag. (elf32_sparc_adjust_dynamic_symbol): Rework initial assertion to permit ELF_LINK_HASH_NEDS_PLT non dynamic symbols. Create a procedure linkage table for such symbols. But, if no dynamic objects were seen, never create a PLT entry. Initialize the size of the .plt section. (elf32_sparc_size_dynamic_sections): If no dynamic objects were seen, skip most of this function, and force the size of the .rela.got section to zero. Strip empty reloc sections, and strip an empty .plt section. (elf32_sparc_relocate_section): For a GOT reloc against a global symbol when no dynamic object was seen, initialize the contents of the .got section. For a GOT reloc against a local symbol, only create a R_SPARC_RELATIVE reloc when generating a shared object. Treat a R_SPARC_WPLT30 reloc against a symbol for which we did not create a PLT entry as a R_SPARC_WDISP30 reloc. (elf32_sparc_finish_dynamic_sections): Only fiddle with the dynamic entries and the PLT if we saw a dynamic object.
Diffstat (limited to 'bfd/elf32-i386.c')
-rw-r--r--bfd/elf32-i386.c547
1 files changed, 310 insertions, 237 deletions
diff --git a/bfd/elf32-i386.c b/bfd/elf32-i386.c
index 4d13c88..eb6a411 100644
--- a/bfd/elf32-i386.c
+++ b/bfd/elf32-i386.c
@@ -31,6 +31,8 @@ static void elf_i386_info_to_howto_rel
PARAMS ((bfd *, arelent *, Elf32_Internal_Rel *));
static boolean elf_i386_create_dynamic_sections
PARAMS ((bfd *, struct bfd_link_info *));
+static boolean elf_i386_create_got_section
+ PARAMS ((bfd *, struct bfd_link_info *));
static boolean elf_i386_check_relocs
PARAMS ((bfd *, struct bfd_link_info *, asection *,
const Elf_Internal_Rela *));
@@ -269,39 +271,9 @@ elf_i386_create_dynamic_sections (abfd, info)
|| ! bfd_set_section_alignment (abfd, s, 2))
return false;
- 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))
+ if (! elf_i386_create_got_section (abfd, info))
return false;
- /* The first three global offset table entries are reserved. */
- s->_raw_size += 3 * 4;
-
/* 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
@@ -336,6 +308,61 @@ elf_i386_create_dynamic_sections (abfd, info)
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_i386_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. */
@@ -355,9 +382,6 @@ elf_i386_check_relocs (abfd, info, sec, relocs)
const Elf_Internal_Rela *rel_end;
asection *sgot;
asection *srelgot;
- asection *splt;
- asection *sgotplt;
- asection *srelplt;
asection *sreloc;
if (info->relocateable)
@@ -370,9 +394,6 @@ elf_i386_check_relocs (abfd, info, sec, relocs)
sgot = NULL;
srelgot = NULL;
- splt = NULL;
- sgotplt = NULL;
- srelplt = NULL;
sreloc = NULL;
rel_end = relocs + sec->reloc_count;
@@ -388,20 +409,16 @@ elf_i386_check_relocs (abfd, info, sec, relocs)
else
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
- /* Some relocs require a global offset table. FIXME: If this is
- a static link of PIC code, we need a global offset table but
- we don't really need to create the full dynamic linking
- information. */
+ /* Some relocs require a global offset table. */
if (dynobj == NULL)
{
switch (ELF32_R_TYPE (rel->r_info))
{
case R_386_GOT32:
- case R_386_PLT32:
case R_386_GOTOFF:
case R_386_GOTPC:
elf_hash_table (info)->dynobj = dynobj = abfd;
- if (! bfd_elf32_link_create_dynamic_sections (dynobj, info))
+ if (! elf_i386_create_got_section (dynobj, info))
return false;
break;
@@ -418,6 +435,12 @@ elf_i386_check_relocs (abfd, info, sec, relocs)
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, ".rel.got");
if (srelgot == NULL)
{
@@ -432,7 +455,6 @@ elf_i386_check_relocs (abfd, info, sec, relocs)
|| ! bfd_set_section_alignment (dynobj, srelgot, 2))
return false;
}
- BFD_ASSERT (sgot != NULL && srelgot != NULL);
}
if (h != NULL)
@@ -450,6 +472,8 @@ elf_i386_check_relocs (abfd, info, sec, relocs)
if (! bfd_elf32_link_record_dynamic_symbol (info, h))
return false;
}
+
+ srelgot->_raw_size += sizeof (Elf32_External_Rel);
}
else
{
@@ -477,41 +501,32 @@ elf_i386_check_relocs (abfd, info, sec, relocs)
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_386_RELATIVE reloc so that the dynamic
+ linker can adjust this GOT entry. */
+ srelgot->_raw_size += sizeof (Elf32_External_Rel);
+ }
}
sgot->_raw_size += 4;
- srelgot->_raw_size += sizeof (Elf32_External_Rel);
break;
case R_386_PLT32:
- /* This symbol requires a procedure linkage table entry. */
+ /* 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;
- if (h->plt_offset != (bfd_vma) -1)
- {
- /* There is already an entry for this symbol in the
- procedure linkage table. */
- break;
- }
-
- if (splt == NULL)
- {
- splt = bfd_get_section_by_name (dynobj, ".plt");
- sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
- srelplt = bfd_get_section_by_name (dynobj, ".rel.plt");
- BFD_ASSERT (splt != NULL && sgotplt != NULL && srelplt != NULL);
- }
-
- /* If this is the first .plt entry, make room for the
- special first entry. */
- if (splt->_raw_size == 0)
- splt->_raw_size += PLT_ENTRY_SIZE;
-
/* Make sure this symbol is output as a dynamic symbol. */
if (h->dynindx == -1)
{
@@ -519,15 +534,7 @@ elf_i386_check_relocs (abfd, info, sec, relocs)
return false;
}
- h->plt_offset = splt->_raw_size;
-
- /* Make room for this entry. We need a procedure linkage
- table entry in .plt, a global offset table entry in
- .got.plt (which is placed in .got by the linker script),
- and a relocation in .rel.plt. */
- splt->_raw_size += PLT_ENTRY_SIZE;
- sgotplt->_raw_size += 4;
- srelplt->_raw_size += sizeof (Elf32_External_Rel);
+ h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
break;
@@ -602,59 +609,66 @@ elf_i386_adjust_dynamic_symbol (info, h)
/* Make sure we know what is going on here. */
BFD_ASSERT (dynobj != NULL
- && (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
&& (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);
+ && ((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.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)
+ 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 (h->plt_offset != (bfd_vma) -1)
- {
- h->root.u.def.section = s;
- h->root.u.def.value = h->plt_offset;
- }
- else
- {
- /* 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 is the first .plt entry, make room for the special
+ first entry. */
+ if (s->_raw_size == 0)
+ s->_raw_size += PLT_ENTRY_SIZE;
- /* Set the symbol to this location in the .plt. */
- h->root.u.def.section = s;
- h->root.u.def.value = s->_raw_size;
+ /* Set the symbol to this location in the .plt. */
+ h->root.u.def.section = s;
+ h->root.u.def.value = s->_raw_size;
- h->plt_offset = s->_raw_size;
+ h->plt_offset = s->_raw_size;
- /* Make room for this entry. */
- s->_raw_size += PLT_ENTRY_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. */
+ /* 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;
+ 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 .rel.plt section. */
+ /* We also need to make an entry in the .rel.plt section. */
- s = bfd_get_section_by_name (dynobj, ".rel.plt");
- BFD_ASSERT (s != NULL);
- s->_raw_size += sizeof (Elf32_External_Rel);
- }
+ s = bfd_get_section_by_name (dynobj, ".rel.plt");
+ BFD_ASSERT (s != NULL);
+ s->_raw_size += sizeof (Elf32_External_Rel);
return true;
}
@@ -751,13 +765,27 @@ elf_i386_size_dynamic_sections (output_bfd, info)
dynobj = elf_hash_table (info)->dynobj;
BFD_ASSERT (dynobj != NULL);
- /* Set the contents of the .interp section to the interpreter. */
- if (! info->shared)
+ if (elf_hash_table (info)->dynamic_sections_created)
{
- 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;
+ /* 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 .rel.got section.
+ However, if we are not creating the dynamic sections, we will
+ not actually use these entries. Reset the size of .rel.got,
+ which will cause it to get stripped from the output file
+ below. */
+ s = bfd_get_section_by_name (dynobj, ".rel.got");
+ if (s != NULL)
+ s->_raw_size = 0;
}
/* The check_relocs and adjust_dynamic_symbol entry points have
@@ -859,39 +887,42 @@ elf_i386_size_dynamic_sections (output_bfd, info)
}
}
- /* Add some entries to the .dynamic section. We fill in the values
- later, in elf_i386_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 (elf_hash_table (info)->dynamic_sections_created)
{
- if (! bfd_elf32_add_dynamic_entry (info, DT_DEBUG, 0))
- return false;
- }
+ /* Add some entries to the .dynamic section. We fill in the
+ values later, in elf_i386_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_REL)
- || ! bfd_elf32_add_dynamic_entry (info, DT_JMPREL, 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_REL)
+ || ! bfd_elf32_add_dynamic_entry (info, DT_JMPREL, 0))
+ return false;
+ }
- if (relocs)
- {
- if (! bfd_elf32_add_dynamic_entry (info, DT_REL, 0)
- || ! bfd_elf32_add_dynamic_entry (info, DT_RELSZ, 0)
- || ! bfd_elf32_add_dynamic_entry (info, DT_RELENT,
- sizeof (Elf32_External_Rel)))
- return false;
- }
+ if (relocs)
+ {
+ if (! bfd_elf32_add_dynamic_entry (info, DT_REL, 0)
+ || ! bfd_elf32_add_dynamic_entry (info, DT_RELSZ, 0)
+ || ! bfd_elf32_add_dynamic_entry (info, DT_RELENT,
+ sizeof (Elf32_External_Rel)))
+ return false;
+ }
- if (reltext)
- {
- if (! bfd_elf32_add_dynamic_entry (info, DT_TEXTREL, 0))
- return false;
+ if (reltext)
+ {
+ if (! bfd_elf32_add_dynamic_entry (info, DT_TEXTREL, 0))
+ return false;
+ }
}
return true;
@@ -910,7 +941,6 @@ elf_i386_relocate_section (output_bfd, info, input_bfd, input_section,
Elf_Internal_Rela *relocs;
Elf_Internal_Sym *local_syms;
asection **local_sections;
- char *output_names;
{
bfd *dynobj;
Elf_Internal_Shdr *symtab_hdr;
@@ -1026,8 +1056,33 @@ elf_i386_relocate_section (output_bfd, info, input_bfd, input_section,
if (h != NULL)
{
- BFD_ASSERT (h->got_offset != (bfd_vma) -1);
- relocation = sgot->output_offset + h->got_offset;
+ 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 .rel.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;
}
else
{
@@ -1045,23 +1100,26 @@ elf_i386_relocate_section (output_bfd, info, input_bfd, input_section,
off &= ~1;
else
{
- asection *srelgot;
- Elf_Internal_Rel outrel;
-
bfd_put_32 (output_bfd, relocation, sgot->contents + off);
- srelgot = bfd_get_section_by_name (dynobj, ".rel.got");
- BFD_ASSERT (srelgot != NULL);
-
- outrel.r_offset = (sgot->output_section->vma
- + sgot->output_offset
- + off);
- outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
- bfd_elf32_swap_reloc_out (output_bfd, &outrel,
- (((Elf32_External_Rel *)
- srelgot->contents)
- + srelgot->reloc_count));
- ++srelgot->reloc_count;
+ if (info->shared)
+ {
+ asection *srelgot;
+ Elf_Internal_Rel outrel;
+
+ srelgot = bfd_get_section_by_name (dynobj, ".rel.got");
+ BFD_ASSERT (srelgot != NULL);
+
+ outrel.r_offset = (sgot->output_section->vma
+ + sgot->output_offset
+ + off);
+ outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
+ bfd_elf32_swap_reloc_out (output_bfd, &outrel,
+ (((Elf32_External_Rel *)
+ srelgot->contents)
+ + srelgot->reloc_count));
+ ++srelgot->reloc_count;
+ }
local_got_offsets[r_symndx] |= 1;
}
@@ -1112,13 +1170,19 @@ elf_i386_relocate_section (output_bfd, info, input_bfd, input_section,
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);
}
- BFD_ASSERT (h != NULL && h->plt_offset != (bfd_vma) -1);
relocation = (splt->output_section->vma
+ splt->output_offset
+ h->plt_offset);
@@ -1161,7 +1225,7 @@ 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 != (bfd_vma) -1);
+ BFD_ASSERT (h != NULL && h->dynindx != -1);
outrel.r_info = ELF32_R_INFO (h->dynindx, R_386_PC32);
}
else
@@ -1395,111 +1459,120 @@ elf_i386_finish_dynamic_sections (output_bfd, info)
struct bfd_link_info *info;
{
bfd *dynobj;
- asection *splt;
asection *sgot;
asection *sdyn;
- Elf32_External_Dyn *dyncon, *dynconend;
dynobj = elf_hash_table (info)->dynobj;
- splt = bfd_get_section_by_name (dynobj, ".plt");
sgot = bfd_get_section_by_name (dynobj, ".got.plt");
+ BFD_ASSERT (sgot != NULL);
sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
- BFD_ASSERT (splt != NULL && sgot != NULL && sdyn != NULL);
- dyncon = (Elf32_External_Dyn *) sdyn->contents;
- dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
- for (; dyncon < dynconend; dyncon++)
+ if (elf_hash_table (info)->dynamic_sections_created)
{
- Elf_Internal_Dyn dyn;
- const char *name;
- asection *s;
+ asection *splt;
+ Elf32_External_Dyn *dyncon, *dynconend;
- bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
+ splt = bfd_get_section_by_name (dynobj, ".plt");
+ BFD_ASSERT (splt != NULL && sdyn != NULL);
- switch (dyn.d_tag)
+ dyncon = (Elf32_External_Dyn *) sdyn->contents;
+ dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
+ for (; dyncon < dynconend; dyncon++)
{
- default:
- break;
+ Elf_Internal_Dyn dyn;
+ const char *name;
+ asection *s;
- case DT_PLTGOT:
- name = ".got";
- goto get_vma;
- case DT_JMPREL:
- name = ".rel.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, ".rel.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;
+ bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
- case DT_RELSZ:
- /* My reading of the SVR4 ABI indicates that the procedure
- linkage table relocs (DT_JMPREL) should be included in
- the overall relocs (DT_REL). This is what Solaris does.
- However, UnixWare can not handle that case. Therefore,
- we override the DT_RELSZ entry here to make it not
- include the JMPREL relocs. Since the linker script
- arranges for .rel.plt to follow all other relocation
- sections, we don't have to worry about changing the
- DT_REL entry. */
- s = bfd_get_section_by_name (output_bfd, ".rel.plt");
- if (s != NULL)
+ switch (dyn.d_tag)
{
+ default:
+ break;
+
+ case DT_PLTGOT:
+ name = ".got";
+ goto get_vma;
+ case DT_JMPREL:
+ name = ".rel.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, ".rel.plt");
+ BFD_ASSERT (s != NULL);
if (s->_cooked_size != 0)
- dyn.d_un.d_val -= s->_cooked_size;
+ dyn.d_un.d_val = s->_cooked_size;
else
- dyn.d_un.d_val -= s->_raw_size;
+ dyn.d_un.d_val = s->_raw_size;
+ bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
+ break;
+
+ case DT_RELSZ:
+ /* My reading of the SVR4 ABI indicates that the
+ procedure linkage table relocs (DT_JMPREL) should be
+ included in the overall relocs (DT_REL). This is
+ what Solaris does. However, UnixWare can not handle
+ that case. Therefore, we override the DT_RELSZ entry
+ here to make it not include the JMPREL relocs. Since
+ the linker script arranges for .rel.plt to follow all
+ other relocation sections, we don't have to worry
+ about changing the DT_REL entry. */
+ s = bfd_get_section_by_name (output_bfd, ".rel.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;
}
- 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)
- {
- if (info->shared)
- memcpy (splt->contents, elf_i386_pic_plt0_entry, PLT_ENTRY_SIZE);
- else
+ /* Fill in the first entry in the procedure linkage table. */
+ if (splt->_raw_size > 0)
{
- memcpy (splt->contents, elf_i386_plt0_entry, PLT_ENTRY_SIZE);
- bfd_put_32 (output_bfd,
- sgot->output_section->vma + sgot->output_offset + 4,
- splt->contents + 2);
- bfd_put_32 (output_bfd,
- sgot->output_section->vma + sgot->output_offset + 8,
- splt->contents + 8);
+ if (info->shared)
+ memcpy (splt->contents, elf_i386_pic_plt0_entry, PLT_ENTRY_SIZE);
+ else
+ {
+ memcpy (splt->contents, elf_i386_plt0_entry, PLT_ENTRY_SIZE);
+ bfd_put_32 (output_bfd,
+ sgot->output_section->vma + sgot->output_offset + 4,
+ splt->contents + 2);
+ bfd_put_32 (output_bfd,
+ sgot->output_section->vma + sgot->output_offset + 8,
+ splt->contents + 8);
+ }
}
+
+ /* UnixWare sets the entsize of .plt to 4, although that doesn't
+ really seem like the right value. */
+ elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
}
/* Fill in the first three entries in the global offset table. */
if (sgot->_raw_size > 0)
{
- bfd_put_32 (output_bfd,
- sdyn->output_section->vma + sdyn->output_offset,
- sgot->contents);
+ 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;
- /* UnixWare sets the entsize of .plt to 4, although that doesn't
- really seem like the right value. */
- elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
-
return true;
}