/* Intel 80386/80486-specific support for 32-bit ELF
- Copyright 1993, 94-98, 1999 Free Software Foundation, Inc.
+ Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001
+ Free Software Foundation, Inc.
This file is part of BFD, the Binary File Descriptor library.
PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
static struct bfd_link_hash_table *elf_i386_link_hash_table_create
PARAMS ((bfd *));
+static boolean create_got_section PARAMS((bfd *, struct bfd_link_info *));
+static boolean elf_i386_create_dynamic_sections
+ PARAMS((bfd *, struct bfd_link_info *));
static boolean elf_i386_check_relocs
PARAMS ((bfd *, struct bfd_link_info *, asection *,
const Elf_Internal_Rela *));
+static asection *elf_i386_gc_mark_hook
+ PARAMS ((bfd *, struct bfd_link_info *, Elf_Internal_Rela *,
+ struct elf_link_hash_entry *, Elf_Internal_Sym *));
+static boolean elf_i386_gc_sweep_hook
+ PARAMS ((bfd *, struct bfd_link_info *, asection *,
+ const Elf_Internal_Rela *));
static boolean elf_i386_adjust_dynamic_symbol
PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
+static boolean allocate_plt_and_got_and_discard_relocs
+ PARAMS ((struct elf_link_hash_entry *, PTR));
static boolean elf_i386_size_dynamic_sections
PARAMS ((bfd *, struct bfd_link_info *));
static boolean elf_i386_relocate_section
Elf_Internal_Sym *));
static boolean elf_i386_finish_dynamic_sections
PARAMS ((bfd *, struct bfd_link_info *));
+static boolean elf_i386_fake_sections
+ PARAMS ((bfd *, Elf32_Internal_Shdr *, asection *));
#define USE_REL 1 /* 386 uses REL relocations instead of RELA */
static reloc_howto_type elf_howto_table[]=
{
- HOWTO(R_386_NONE, 0,0, 0,false,0,complain_overflow_bitfield, bfd_elf_generic_reloc,"R_386_NONE", true,0x00000000,0x00000000,false),
- HOWTO(R_386_32, 0,2,32,false,0,complain_overflow_bitfield, bfd_elf_generic_reloc,"R_386_32", true,0xffffffff,0xffffffff,false),
- HOWTO(R_386_PC32, 0,2,32,true, 0,complain_overflow_bitfield, bfd_elf_generic_reloc,"R_386_PC32", true,0xffffffff,0xffffffff,true),
- HOWTO(R_386_GOT32, 0,2,32,false,0,complain_overflow_bitfield, bfd_elf_generic_reloc,"R_386_GOT32", true,0xffffffff,0xffffffff,false),
- HOWTO(R_386_PLT32, 0,2,32,true,0,complain_overflow_bitfield, bfd_elf_generic_reloc,"R_386_PLT32", true,0xffffffff,0xffffffff,true),
- HOWTO(R_386_COPY, 0,2,32,false,0,complain_overflow_bitfield, bfd_elf_generic_reloc,"R_386_COPY", true,0xffffffff,0xffffffff,false),
- HOWTO(R_386_GLOB_DAT, 0,2,32,false,0,complain_overflow_bitfield, bfd_elf_generic_reloc,"R_386_GLOB_DAT", true,0xffffffff,0xffffffff,false),
- HOWTO(R_386_JUMP_SLOT, 0,2,32,false,0,complain_overflow_bitfield, bfd_elf_generic_reloc,"R_386_JUMP_SLOT",true,0xffffffff,0xffffffff,false),
- HOWTO(R_386_RELATIVE, 0,2,32,false,0,complain_overflow_bitfield, bfd_elf_generic_reloc,"R_386_RELATIVE", true,0xffffffff,0xffffffff,false),
- HOWTO(R_386_GOTOFF, 0,2,32,false,0,complain_overflow_bitfield, bfd_elf_generic_reloc,"R_386_GOTOFF", true,0xffffffff,0xffffffff,false),
- HOWTO(R_386_GOTPC, 0,2,32,true,0,complain_overflow_bitfield, bfd_elf_generic_reloc,"R_386_GOTPC", true,0xffffffff,0xffffffff,true),
- EMPTY_HOWTO (11),
- EMPTY_HOWTO (12),
- EMPTY_HOWTO (13),
- EMPTY_HOWTO (14),
- EMPTY_HOWTO (15),
- EMPTY_HOWTO (16),
- EMPTY_HOWTO (17),
- EMPTY_HOWTO (18),
- EMPTY_HOWTO (19),
+ HOWTO(R_386_NONE, 0, 0, 0, false, 0, complain_overflow_bitfield,
+ bfd_elf_generic_reloc, "R_386_NONE",
+ true, 0x00000000, 0x00000000, false),
+ HOWTO(R_386_32, 0, 2, 32, false, 0, complain_overflow_bitfield,
+ bfd_elf_generic_reloc, "R_386_32",
+ true, 0xffffffff, 0xffffffff, false),
+ HOWTO(R_386_PC32, 0, 2, 32, true, 0, complain_overflow_bitfield,
+ bfd_elf_generic_reloc, "R_386_PC32",
+ true, 0xffffffff, 0xffffffff, true),
+ HOWTO(R_386_GOT32, 0, 2, 32, false, 0, complain_overflow_bitfield,
+ bfd_elf_generic_reloc, "R_386_GOT32",
+ true, 0xffffffff, 0xffffffff, false),
+ HOWTO(R_386_PLT32, 0, 2, 32, true, 0, complain_overflow_bitfield,
+ bfd_elf_generic_reloc, "R_386_PLT32",
+ true, 0xffffffff, 0xffffffff, true),
+ HOWTO(R_386_COPY, 0, 2, 32, false, 0, complain_overflow_bitfield,
+ bfd_elf_generic_reloc, "R_386_COPY",
+ true, 0xffffffff, 0xffffffff, false),
+ HOWTO(R_386_GLOB_DAT, 0, 2, 32, false, 0, complain_overflow_bitfield,
+ bfd_elf_generic_reloc, "R_386_GLOB_DAT",
+ true, 0xffffffff, 0xffffffff, false),
+ HOWTO(R_386_JUMP_SLOT, 0, 2, 32, false, 0, complain_overflow_bitfield,
+ bfd_elf_generic_reloc, "R_386_JUMP_SLOT",
+ true, 0xffffffff, 0xffffffff, false),
+ HOWTO(R_386_RELATIVE, 0, 2, 32, false, 0, complain_overflow_bitfield,
+ bfd_elf_generic_reloc, "R_386_RELATIVE",
+ true, 0xffffffff, 0xffffffff, false),
+ HOWTO(R_386_GOTOFF, 0, 2, 32, false, 0, complain_overflow_bitfield,
+ bfd_elf_generic_reloc, "R_386_GOTOFF",
+ true, 0xffffffff, 0xffffffff, false),
+ HOWTO(R_386_GOTPC, 0, 2, 32, true, 0, complain_overflow_bitfield,
+ bfd_elf_generic_reloc, "R_386_GOTPC",
+ true, 0xffffffff, 0xffffffff, true),
+
+ /* We have a gap in the reloc numbers here.
+ R_386_standard counts the number up to this point, and
+ R_386_ext_offset is the value to subtract from a reloc type of
+ R_386_16 thru R_386_PC8 to form an index into this table. */
+#define R_386_standard ((unsigned int) R_386_GOTPC + 1)
+#define R_386_ext_offset ((unsigned int) R_386_16 - R_386_standard)
+
/* The remaining relocs are a GNU extension. */
- HOWTO(R_386_16, 0,1,16,false,0,complain_overflow_bitfield, bfd_elf_generic_reloc,"R_386_16", true,0xffff,0xffff,false),
- HOWTO(R_386_PC16, 0,1,16,true, 0,complain_overflow_bitfield, bfd_elf_generic_reloc,"R_386_PC16", true,0xffff,0xffff,true),
- HOWTO(R_386_8, 0,0,8,false,0,complain_overflow_bitfield, bfd_elf_generic_reloc,"R_386_8", true,0xff,0xff,false),
- HOWTO(R_386_PC8, 0,0,8,true, 0,complain_overflow_signed, bfd_elf_generic_reloc,"R_386_PC8", true,0xff,0xff,true),
-};
+ HOWTO(R_386_16, 0, 1, 16, false, 0, complain_overflow_bitfield,
+ bfd_elf_generic_reloc, "R_386_16",
+ true, 0xffff, 0xffff, false),
+ HOWTO(R_386_PC16, 0, 1, 16, true, 0, complain_overflow_bitfield,
+ bfd_elf_generic_reloc, "R_386_PC16",
+ true, 0xffff, 0xffff, true),
+ HOWTO(R_386_8, 0, 0, 8, false, 0, complain_overflow_bitfield,
+ bfd_elf_generic_reloc, "R_386_8",
+ true, 0xff, 0xff, false),
+ HOWTO(R_386_PC8, 0, 0, 8, true, 0, complain_overflow_signed,
+ bfd_elf_generic_reloc, "R_386_PC8",
+ true, 0xff, 0xff, true),
+
+ /* Another gap. */
+#define R_386_ext ((unsigned int) R_386_PC8 + 1 - R_386_ext_offset)
+#define R_386_vt_offset ((unsigned int) R_386_GNU_VTINHERIT - R_386_ext)
/* GNU extension to record C++ vtable hierarchy. */
-static reloc_howto_type elf32_i386_vtinherit_howto =
HOWTO (R_386_GNU_VTINHERIT, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
false, /* partial_inplace */
0, /* src_mask */
0, /* dst_mask */
- false);
+ false),
/* GNU extension to record C++ vtable member usage. */
-static reloc_howto_type elf32_i386_vtentry_howto =
HOWTO (R_386_GNU_VTENTRY, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
false, /* partial_inplace */
0, /* src_mask */
0, /* dst_mask */
- false);
+ false)
+
+#define R_386_vt ((unsigned int) R_386_GNU_VTENTRY + 1 - R_386_vt_offset)
+
+};
#ifdef DEBUG_GEN_RELOC
#define TRACE(str) fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
{
case BFD_RELOC_NONE:
TRACE ("BFD_RELOC_NONE");
- return &elf_howto_table[ (int)R_386_NONE ];
+ return &elf_howto_table[(unsigned int) R_386_NONE ];
case BFD_RELOC_32:
TRACE ("BFD_RELOC_32");
- return &elf_howto_table[ (int)R_386_32 ];
+ return &elf_howto_table[(unsigned int) R_386_32 ];
case BFD_RELOC_CTOR:
TRACE ("BFD_RELOC_CTOR");
- return &elf_howto_table[ (int)R_386_32 ];
+ return &elf_howto_table[(unsigned int) R_386_32 ];
case BFD_RELOC_32_PCREL:
TRACE ("BFD_RELOC_PC32");
- return &elf_howto_table[ (int)R_386_PC32 ];
+ return &elf_howto_table[(unsigned int) R_386_PC32 ];
case BFD_RELOC_386_GOT32:
TRACE ("BFD_RELOC_386_GOT32");
- return &elf_howto_table[ (int)R_386_GOT32 ];
+ return &elf_howto_table[(unsigned int) R_386_GOT32 ];
case BFD_RELOC_386_PLT32:
TRACE ("BFD_RELOC_386_PLT32");
- return &elf_howto_table[ (int)R_386_PLT32 ];
+ return &elf_howto_table[(unsigned int) R_386_PLT32 ];
case BFD_RELOC_386_COPY:
TRACE ("BFD_RELOC_386_COPY");
- return &elf_howto_table[ (int)R_386_COPY ];
+ return &elf_howto_table[(unsigned int) R_386_COPY ];
case BFD_RELOC_386_GLOB_DAT:
TRACE ("BFD_RELOC_386_GLOB_DAT");
- return &elf_howto_table[ (int)R_386_GLOB_DAT ];
+ return &elf_howto_table[(unsigned int) R_386_GLOB_DAT ];
case BFD_RELOC_386_JUMP_SLOT:
TRACE ("BFD_RELOC_386_JUMP_SLOT");
- return &elf_howto_table[ (int)R_386_JUMP_SLOT ];
+ return &elf_howto_table[(unsigned int) R_386_JUMP_SLOT ];
case BFD_RELOC_386_RELATIVE:
TRACE ("BFD_RELOC_386_RELATIVE");
- return &elf_howto_table[ (int)R_386_RELATIVE ];
+ return &elf_howto_table[(unsigned int) R_386_RELATIVE ];
case BFD_RELOC_386_GOTOFF:
TRACE ("BFD_RELOC_386_GOTOFF");
- return &elf_howto_table[ (int)R_386_GOTOFF ];
+ return &elf_howto_table[(unsigned int) R_386_GOTOFF ];
case BFD_RELOC_386_GOTPC:
TRACE ("BFD_RELOC_386_GOTPC");
- return &elf_howto_table[ (int)R_386_GOTPC ];
+ return &elf_howto_table[(unsigned int) R_386_GOTPC ];
/* The remaining relocs are a GNU extension. */
case BFD_RELOC_16:
TRACE ("BFD_RELOC_16");
- return &elf_howto_table[(int) R_386_16];
+ return &elf_howto_table[(unsigned int) R_386_16 - R_386_ext_offset];
case BFD_RELOC_16_PCREL:
TRACE ("BFD_RELOC_16_PCREL");
- return &elf_howto_table[(int) R_386_PC16];
+ return &elf_howto_table[(unsigned int) R_386_PC16 - R_386_ext_offset];
case BFD_RELOC_8:
TRACE ("BFD_RELOC_8");
- return &elf_howto_table[(int) R_386_8];
+ return &elf_howto_table[(unsigned int) R_386_8 - R_386_ext_offset];
case BFD_RELOC_8_PCREL:
TRACE ("BFD_RELOC_8_PCREL");
- return &elf_howto_table[(int) R_386_PC8];
+ return &elf_howto_table[(unsigned int) R_386_PC8 - R_386_ext_offset];
case BFD_RELOC_VTABLE_INHERIT:
TRACE ("BFD_RELOC_VTABLE_INHERIT");
- return &elf32_i386_vtinherit_howto;
+ return &elf_howto_table[(unsigned int) R_386_GNU_VTINHERIT
+ - R_386_vt_offset];
case BFD_RELOC_VTABLE_ENTRY:
TRACE ("BFD_RELOC_VTABLE_ENTRY");
- return &elf32_i386_vtentry_howto;
+ return &elf_howto_table[(unsigned int) R_386_GNU_VTENTRY
+ - R_386_vt_offset];
default:
break;
arelent *cache_ptr;
Elf32_Internal_Rel *dst;
{
- enum elf_i386_reloc_type type;
-
- type = (enum elf_i386_reloc_type) ELF32_R_TYPE (dst->r_info);
- if (type == R_386_GNU_VTINHERIT)
- cache_ptr->howto = &elf32_i386_vtinherit_howto;
- else if (type == R_386_GNU_VTENTRY)
- cache_ptr->howto = &elf32_i386_vtentry_howto;
- else
+ unsigned int r_type = ELF32_R_TYPE (dst->r_info);
+ unsigned int indx;
+
+ if ((indx = r_type) >= R_386_standard
+ && ((indx = r_type - R_386_ext_offset) - R_386_standard
+ >= R_386_ext - R_386_standard)
+ && ((indx = r_type - R_386_vt_offset) - R_386_ext
+ >= R_386_vt - R_386_ext))
{
- BFD_ASSERT (type < R_386_max);
- BFD_ASSERT (type < FIRST_INVALID_RELOC || type > LAST_INVALID_RELOC);
- cache_ptr->howto = &elf_howto_table[(int) type];
+ (*_bfd_error_handler) (_("%s: invalid relocation type %d"),
+ bfd_get_filename (abfd), (int) r_type);
+ indx = (unsigned int) R_386_NONE;
}
+ cache_ptr->howto = &elf_howto_table[indx];
}
/* Return whether a symbol name implies a local label. The UnixWare
};
/* The i386 linker needs to keep track of the number of relocs that it
- decides to copy in check_relocs for each symbol. This is so that
- it can discard PC relative relocs if it doesn't need them when
- linking with -Bsymbolic. We store the information in a field
- extending the regular ELF linker hash table. */
+ decides to copy as dynamic relocs in check_relocs for each symbol.
+ This is so that it can later discard them if they are found to be
+ unnecessary. We store the information in a field extending the
+ regular ELF linker hash table. */
-/* This structure keeps track of the number of PC relative relocs we
- have copied for a given symbol. */
-
-struct elf_i386_pcrel_relocs_copied
+struct elf_i386_dyn_relocs
{
/* Next section. */
- struct elf_i386_pcrel_relocs_copied *next;
+ struct elf_i386_dyn_relocs *next;
/* A section in dynobj. */
asection *section;
/* Number of relocs copied in this section. */
struct elf_link_hash_entry root;
/* Number of PC relative relocs copied for this symbol. */
- struct elf_i386_pcrel_relocs_copied *pcrel_relocs_copied;
+ struct elf_i386_dyn_relocs *dyn_relocs;
};
/* i386 ELF linker hash table. */
struct elf_i386_link_hash_table
{
struct elf_link_hash_table root;
-};
-/* Declare this now that the above structures are defined. */
-
-static boolean elf_i386_discard_copies
- PARAMS ((struct elf_i386_link_hash_entry *, PTR));
-
-/* Traverse an i386 ELF linker hash table. */
-
-#define elf_i386_link_hash_traverse(table, func, info) \
- (elf_link_hash_traverse \
- (&(table)->root, \
- (boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \
- (info)))
+ /* Short-cuts to get to dynamic linker sections. */
+ asection *sgot;
+ asection *sgotplt;
+ asection *srelgot;
+ asection *splt;
+ asection *srelplt;
+ asection *sdynbss;
+ asection *srelbss;
+};
/* Get the i386 ELF linker hash table from a link_info structure. */
table, string));
if (ret != (struct elf_i386_link_hash_entry *) NULL)
{
- ret->pcrel_relocs_copied = NULL;
+ ret->dyn_relocs = NULL;
}
return (struct bfd_hash_entry *) ret;
return NULL;
}
+ ret->sgot = NULL;
+ ret->sgotplt = NULL;
+ ret->srelgot = NULL;
+ ret->splt = NULL;
+ ret->srelplt = NULL;
+ ret->sdynbss = NULL;
+ ret->srelbss = NULL;
+
return &ret->root.root;
}
+/* Create .got, .gotplt, and .rel.got sections in DYNOBJ, and set up
+ shortcuts to them in our hash table. */
+
+static boolean
+create_got_section (dynobj, info)
+ bfd *dynobj;
+ struct bfd_link_info *info;
+{
+ struct elf_i386_link_hash_table *htab;
+
+ if (! _bfd_elf_create_got_section (dynobj, info))
+ return false;
+
+ htab = elf_i386_hash_table (info);
+ htab->sgot = bfd_get_section_by_name (dynobj, ".got");
+ htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
+ if (!htab->sgot || !htab->sgotplt)
+ abort ();
+
+ htab->srelgot = bfd_make_section (dynobj, ".rel.got");
+ if (htab->srelgot == NULL
+ || ! bfd_set_section_flags (dynobj, htab->srelgot,
+ (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
+ | SEC_IN_MEMORY | SEC_LINKER_CREATED
+ | SEC_READONLY))
+ || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2))
+ return false;
+ return true;
+}
+
+/* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
+ .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
+ hash table. */
+
+static boolean
+elf_i386_create_dynamic_sections (dynobj, info)
+ bfd *dynobj;
+ struct bfd_link_info *info;
+{
+ struct elf_i386_link_hash_table *htab;
+
+ htab = elf_i386_hash_table (info);
+ if (!htab->sgot && !create_got_section (dynobj, info))
+ return false;
+
+ if (!_bfd_elf_create_dynamic_sections (dynobj, info))
+ return false;
+
+ htab->splt = bfd_get_section_by_name (dynobj, ".plt");
+ htab->srelplt = bfd_get_section_by_name (dynobj, ".rel.plt");
+ htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
+ if (!info->shared)
+ htab->srelbss = bfd_get_section_by_name (dynobj, ".rel.bss");
+
+ if (!htab->splt || !htab->srelplt || !htab->sdynbss
+ || (!info->shared && !htab->srelbss))
+ abort ();
+
+ 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. */
asection *sec;
const Elf_Internal_Rela *relocs;
{
+ struct elf_i386_link_hash_table *htab;
bfd *dynobj;
Elf_Internal_Shdr *symtab_hdr;
struct elf_link_hash_entry **sym_hashes;
- bfd_vma *local_got_offsets;
+ bfd_signed_vma *local_got_refcounts;
const Elf_Internal_Rela *rel;
const Elf_Internal_Rela *rel_end;
- asection *sgot;
- asection *srelgot;
asection *sreloc;
if (info->relocateable)
return true;
- dynobj = elf_hash_table (info)->dynobj;
+ htab = elf_i386_hash_table (info);
+ dynobj = htab->root.dynobj;
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
sym_hashes = elf_sym_hashes (abfd);
- local_got_offsets = elf_local_got_offsets (abfd);
+ local_got_refcounts = elf_local_got_refcounts (abfd);
- sgot = NULL;
- srelgot = NULL;
sreloc = NULL;
rel_end = relocs + sec->reloc_count;
r_symndx = ELF32_R_SYM (rel->r_info);
+ if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
+ {
+ if (abfd->my_archive)
+ (*_bfd_error_handler) (_("%s(%s): bad symbol index: %d"),
+ bfd_get_filename (abfd->my_archive),
+ bfd_get_filename (abfd),
+ r_symndx);
+ else
+ (*_bfd_error_handler) (_("%s: bad symbol index: %d"),
+ bfd_get_filename (abfd),
+ r_symndx);
+ return false;
+ }
+
if (r_symndx < symtab_hdr->sh_info)
h = NULL;
else
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
/* Some relocs require a global offset table. */
- if (dynobj == NULL)
+ if (htab->sgot == NULL)
{
switch (ELF32_R_TYPE (rel->r_info))
{
case R_386_GOT32:
case R_386_GOTOFF:
case R_386_GOTPC:
- elf_hash_table (info)->dynobj = dynobj = abfd;
- if (! _bfd_elf_create_got_section (dynobj, info))
+ if (dynobj == NULL)
+ htab->root.dynobj = dynobj = abfd;
+ if (!create_got_section (dynobj, info))
return false;
break;
{
case R_386_GOT32:
/* This symbol requires a global offset table entry. */
-
- 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)
- {
- srelgot = bfd_make_section (dynobj, ".rel.got");
- if (srelgot == NULL
- || ! bfd_set_section_flags (dynobj, srelgot,
- (SEC_ALLOC
- | SEC_LOAD
- | SEC_HAS_CONTENTS
- | SEC_IN_MEMORY
- | SEC_LINKER_CREATED
- | SEC_READONLY))
- || ! bfd_set_section_alignment (dynobj, srelgot, 2))
- return false;
- }
- }
-
if (h != NULL)
{
- if (h->got.offset != (bfd_vma) -1)
- {
- /* We have already allocated space in the .got. */
- break;
- }
- h->got.offset = sgot->_raw_size;
-
- /* Make sure this symbol is output as a dynamic symbol. */
- if (h->dynindx == -1)
- {
- if (! bfd_elf32_link_record_dynamic_symbol (info, h))
- return false;
- }
-
- srelgot->_raw_size += sizeof (Elf32_External_Rel);
+ if (h->got.refcount == -1)
+ h->got.refcount = 1;
+ else
+ h->got.refcount += 1;
}
else
{
- /* This is a global offset table entry for a local
- symbol. */
- if (local_got_offsets == NULL)
+ /* This is a global offset table entry for a local symbol. */
+ if (local_got_refcounts == NULL)
{
size_t size;
- register unsigned int i;
- size = symtab_hdr->sh_info * sizeof (bfd_vma);
- local_got_offsets = (bfd_vma *) bfd_alloc (abfd, size);
- if (local_got_offsets == NULL)
+ size = symtab_hdr->sh_info * sizeof (bfd_signed_vma);
+ local_got_refcounts = ((bfd_signed_vma *)
+ bfd_alloc (abfd, size));
+ if (local_got_refcounts == NULL)
return false;
- elf_local_got_offsets (abfd) = local_got_offsets;
- for (i = 0; i < symtab_hdr->sh_info; i++)
- local_got_offsets[i] = (bfd_vma) -1;
- }
- if (local_got_offsets[r_symndx] != (bfd_vma) -1)
- {
- /* We have already allocated space in the .got. */
- 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);
+ elf_local_got_refcounts (abfd) = local_got_refcounts;
+ memset (local_got_refcounts, -1, size);
}
+ if (local_got_refcounts[r_symndx] == -1)
+ local_got_refcounts[r_symndx] = 1;
+ else
+ local_got_refcounts[r_symndx] += 1;
}
-
- sgot->_raw_size += 4;
-
break;
case R_386_PLT32:
/* 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 which is
- never referenced by a dynamic object, in which case we
- don't need to generate a procedure linkage table entry
- after all. */
+ actually build the entry in adjust_dynamic_symbol,
+ because this might be a case of linking PIC code which is
+ never referenced by a dynamic object, in which case we
+ don't need to generate a procedure linkage table entry
+ after all. */
/* If this is a local symbol, we resolve it directly without
- creating a procedure linkage table entry. */
+ creating a procedure linkage table entry. */
if (h == NULL)
continue;
- h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
-
+ if (h->plt.refcount == -1)
+ {
+ h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
+ h->plt.refcount = 1;
+ }
+ else
+ h->plt.refcount += 1;
break;
case R_386_32:
case R_386_PC32:
- if (h != NULL)
- h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
+ if (h != NULL && !info->shared)
+ {
+ /* If this reloc is in a read-only section, we might
+ need a copy reloc. */
+ if ((sec->flags & SEC_READONLY) != 0)
+ h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
+
+ /* We may need a .plt entry if the function this reloc
+ refers to is in a shared lib. */
+ if (h->plt.refcount == -1)
+ h->plt.refcount = 1;
+ else
+ h->plt.refcount += 1;
+ }
/* If we are creating a shared library, and this is a reloc
- against a global symbol, or a non PC relative reloc
- against a local symbol, then we need to copy the reloc
- into the shared library. However, if we are linking with
- -Bsymbolic, we do not need to copy a reloc against a
- global symbol which is defined in an object we are
- including in the link (i.e., DEF_REGULAR is set). At
- this point we have not seen all the input files, so it is
- possible that DEF_REGULAR is not set now but will be set
- later (it is never cleared). We account for that
- possibility below by storing information in the
- pcrel_relocs_copied field of the hash table entry. */
- if (info->shared
- && (sec->flags & SEC_ALLOC) != 0
- && (ELF32_R_TYPE (rel->r_info) != R_386_PC32
- || (h != NULL
- && (! info->symbolic
- || (h->elf_link_hash_flags
- & ELF_LINK_HASH_DEF_REGULAR) == 0))))
+ against a global symbol, or a non PC relative reloc
+ against a local symbol, then we need to copy the reloc
+ into the shared library. However, if we are linking with
+ -Bsymbolic, we do not need to copy a reloc against a
+ global symbol which is defined in an object we are
+ including in the link (i.e., DEF_REGULAR is set). At
+ this point we have not seen all the input files, so it is
+ possible that DEF_REGULAR is not set now but will be set
+ later (it is never cleared). In case of a weak definition,
+ DEF_REGULAR may be cleared later by a strong definition in
+ a shared library. We account for that possibility below by
+ storing information in the relocs_copied field of the hash
+ table entry. A similar situation occurs when creating
+ shared libraries and symbol visibility changes render the
+ symbol local.
+ If on the other hand, we are creating an executable, we
+ may need to keep relocations for symbols satisfied by a
+ dynamic library if we manage to avoid copy relocs for the
+ symbol. */
+ if ((info->shared
+ && (sec->flags & SEC_ALLOC) != 0
+ && (ELF32_R_TYPE (rel->r_info) != R_386_PC32
+ || (h != NULL
+ && (! info->symbolic
+ || h->root.type == bfd_link_hash_defweak
+ || (h->elf_link_hash_flags
+ & ELF_LINK_HASH_DEF_REGULAR) == 0))))
+ || (!info->shared
+ && (sec->flags & SEC_ALLOC) != 0
+ && h != NULL
+ && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
+ && (h->root.type == bfd_link_hash_defweak
+ || (h->elf_link_hash_flags
+ & ELF_LINK_HASH_DEF_REGULAR) == 0)))
{
- /* When creating a shared object, we must copy these
- reloc types into the output file. We create a reloc
- section in dynobj and make room for this reloc. */
+ /* We must copy these reloc types into the output file.
+ Create a reloc section in dynobj and make room for
+ this reloc. */
+ if (dynobj == NULL)
+ htab->root.dynobj = dynobj = abfd;
+
if (sreloc == NULL)
{
const char *name;
if (name == NULL)
return false;
- BFD_ASSERT (strncmp (name, ".rel", 4) == 0
- && strcmp (bfd_get_section_name (abfd, sec),
- name + 4) == 0);
+ if (strncmp (name, ".rel", 4) != 0
+ || strcmp (bfd_get_section_name (abfd, sec),
+ name + 4) != 0)
+ {
+ if (abfd->my_archive)
+ (*_bfd_error_handler) (_("%s(%s): bad relocation section name `%s\'"),
+ bfd_get_filename (abfd->my_archive),
+ bfd_get_filename (abfd),
+ name);
+ else
+ (*_bfd_error_handler) (_("%s: bad relocation section name `%s\'"),
+ bfd_get_filename (abfd),
+ name);
+ }
sreloc = bfd_get_section_by_name (dynobj, name);
if (sreloc == NULL)
sreloc->_raw_size += sizeof (Elf32_External_Rel);
- /* If we are linking with -Bsymbolic, and this is a
- global symbol, we count the number of PC relative
- relocations we have entered for this symbol, so that
- we can discard them again if the symbol is later
- defined by a regular object. Note that this function
- is only called if we are using an elf_i386 linker
- hash table, which means that h is really a pointer to
- an elf_i386_link_hash_entry. */
- if (h != NULL && info->symbolic
- && ELF32_R_TYPE (rel->r_info) == R_386_PC32)
+ /* If this is a global symbol, we count the number of PC
+ relative relocations we have entered for this symbol,
+ so that we can discard them later as necessary. Note
+ that this function is only called if we are using an
+ elf_i386 linker hash table, which means that h is
+ really a pointer to an elf_i386_link_hash_entry. */
+ if (!info->shared
+ || (h != NULL
+ && ELF32_R_TYPE (rel->r_info) == R_386_PC32))
{
struct elf_i386_link_hash_entry *eh;
- struct elf_i386_pcrel_relocs_copied *p;
+ struct elf_i386_dyn_relocs *p;
eh = (struct elf_i386_link_hash_entry *) h;
- for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
+ for (p = eh->dyn_relocs; p != NULL; p = p->next)
if (p->section == sreloc)
break;
if (p == NULL)
{
- p = ((struct elf_i386_pcrel_relocs_copied *)
+ p = ((struct elf_i386_dyn_relocs *)
bfd_alloc (dynobj, sizeof *p));
if (p == NULL)
return false;
- p->next = eh->pcrel_relocs_copied;
- eh->pcrel_relocs_copied = p;
+ p->next = eh->dyn_relocs;
+ eh->dyn_relocs = p;
p->section = sreloc;
p->count = 0;
}
static boolean
elf_i386_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;
+ bfd *abfd;
+ struct bfd_link_info *info;
+ asection *sec;
+ const Elf_Internal_Rela *relocs;
{
- /* ??? It would seem that the existing i386 code does no sort
- of reference counting or whatnot on its GOT and PLT entries,
- so it is not possible to garbage collect them at this time. */
+ Elf_Internal_Shdr *symtab_hdr;
+ struct elf_link_hash_entry **sym_hashes;
+ bfd_signed_vma *local_got_refcounts;
+ const Elf_Internal_Rela *rel, *relend;
+ unsigned long r_symndx;
+ struct elf_link_hash_entry *h;
+ bfd *dynobj;
+
+ dynobj = elf_hash_table (info)->dynobj;
+ if (dynobj == NULL)
+ return true;
+
+ symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
+ sym_hashes = elf_sym_hashes (abfd);
+ local_got_refcounts = elf_local_got_refcounts (abfd);
+
+ relend = relocs + sec->reloc_count;
+ for (rel = relocs; rel < relend; rel++)
+ switch (ELF32_R_TYPE (rel->r_info))
+ {
+ case R_386_GOT32:
+ case R_386_GOTOFF:
+ case R_386_GOTPC:
+ r_symndx = ELF32_R_SYM (rel->r_info);
+ if (r_symndx >= symtab_hdr->sh_info)
+ {
+ h = sym_hashes[r_symndx - symtab_hdr->sh_info];
+ if (h->got.refcount > 0)
+ h->got.refcount -= 1;
+ }
+ else if (local_got_refcounts != NULL)
+ {
+ if (local_got_refcounts[r_symndx] > 0)
+ local_got_refcounts[r_symndx] -= 1;
+ }
+ break;
+
+ case R_386_32:
+ case R_386_PC32:
+ if (info->shared)
+ break;
+ /* Fall through. */
+
+ case R_386_PLT32:
+ r_symndx = ELF32_R_SYM (rel->r_info);
+ if (r_symndx >= symtab_hdr->sh_info)
+ {
+ h = sym_hashes[r_symndx - symtab_hdr->sh_info];
+ if (h->plt.refcount > 0)
+ h->plt.refcount -= 1;
+ }
+ break;
+
+ default:
+ break;
+ }
return true;
}
struct bfd_link_info *info;
struct elf_link_hash_entry *h;
{
+ struct elf_i386_link_hash_table *htab;
bfd *dynobj;
asection *s;
unsigned int power_of_two;
- dynobj = elf_hash_table (info)->dynobj;
-
- /* Make sure we know what is going on here. */
- BFD_ASSERT (dynobj != NULL
- && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT)
- || h->weakdef != 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)));
+ htab = elf_i386_hash_table (info);
+ dynobj = htab->root.dynobj;
/* If this is a function, put it in the procedure linkage table. We
will fill in the contents of the procedure linkage table later,
if (h->type == STT_FUNC
|| (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
{
- if (! info->shared
- && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0
- && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0)
+ if (h->plt.refcount <= 0
+ || (! info->shared
+ && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0
+ && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0))
{
/* This case can occur if we saw a PLT32 reloc in an input
- file, but the symbol was never referred to by a dynamic
- object. 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;
- }
-
- /* Make sure this symbol is output as a dynamic symbol. */
- if (h->dynindx == -1)
- {
- if (! bfd_elf32_link_record_dynamic_symbol (info, h))
- return false;
- }
-
- s = bfd_get_section_by_name (dynobj, ".plt");
- BFD_ASSERT (s != NULL);
-
- /* 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 symbol is not defined in a regular file, and we are
- not generating a shared library, then set the symbol to this
- location in the .plt. This is required to make function
- pointers compare as equal between the normal executable and
- the shared library. */
- if (! info->shared
- && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
- {
- h->root.u.def.section = s;
- h->root.u.def.value = s->_raw_size;
+ file, but the symbol was never referred to by a dynamic
+ object, or if all references were garbage collected. In
+ such a case, we don't actually need to build a procedure
+ linkage table, and we can just do a PC32 reloc instead. */
+ h->plt.refcount = (bfd_vma) -1;
+ h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
}
- h->plt.offset = s->_raw_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. */
-
- 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. */
-
- s = bfd_get_section_by_name (dynobj, ".rel.plt");
- BFD_ASSERT (s != NULL);
- s->_raw_size += sizeof (Elf32_External_Rel);
-
return true;
}
+ else
+ /* It's possible that we incorrectly decided a .plt reloc was
+ needed for an R_386_PC32 reloc to a non-function sym in
+ check_relocs. We can't decide accurately between function and
+ non-function syms in check-relocs; Objects loaded later in
+ the link may change h->type. So fix it now. */
+ h->plt.refcount = (bfd_vma) -1;
/* If this is a weak symbol, and there is a real definition, the
processor independent code will have arranged for us to see the
both the dynamic object and the regular object will refer to the
same memory location for the variable. */
- s = bfd_get_section_by_name (dynobj, ".dynbss");
- BFD_ASSERT (s != NULL);
+ s = htab->sdynbss;
+ if (s == NULL)
+ abort ();
/* We must generate a R_386_COPY reloc to tell the dynamic linker to
copy the initial value out of the dynamic object and into the
{
asection *srel;
- srel = bfd_get_section_by_name (dynobj, ".rel.bss");
- BFD_ASSERT (srel != NULL);
+ srel = htab->srelbss;
+ if (srel == NULL)
+ abort ();
srel->_raw_size += sizeof (Elf32_External_Rel);
h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
}
return true;
}
+/* This is the condition under which elf_i386_finish_dynamic_symbol
+ will be called from elflink.h. If elflink.h doesn't call our
+ finish_dynamic_symbol routine, we'll need to do something about
+ initializing any .plt and .got entries in elf_i386_relocate_section. */
+#define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, INFO, H) \
+ ((DYN) \
+ && ((INFO)->shared \
+ || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \
+ && ((H)->dynindx != -1 \
+ || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0))
+
+/* Allocate space in .plt, .got and associated reloc sections for
+ global syms. Also discards space allocated for relocs in the
+ check_relocs function that we subsequently have found to be
+ unneeded. */
+
+static boolean
+allocate_plt_and_got_and_discard_relocs (h, inf)
+ struct elf_link_hash_entry *h;
+ PTR inf;
+{
+ struct bfd_link_info *info;
+ struct elf_i386_link_hash_table *htab;
+ asection *s;
+ struct elf_i386_link_hash_entry *eh;
+
+ if (h->root.type == bfd_link_hash_indirect
+ || h->root.type == bfd_link_hash_warning)
+ return true;
+
+ info = (struct bfd_link_info *) inf;
+ htab = elf_i386_hash_table (info);
+
+ if (htab->root.dynamic_sections_created
+ && h->plt.refcount > 0)
+ {
+ /* Make sure this symbol is output as a dynamic symbol.
+ Undefined weak syms won't yet be marked as dynamic. */
+ if (h->dynindx == -1
+ && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
+ {
+ if (! bfd_elf32_link_record_dynamic_symbol (info, h))
+ return false;
+ }
+
+ s = htab->splt;
+ if (s == NULL)
+ abort ();
+
+ /* 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;
+
+ h->plt.offset = s->_raw_size;
+
+ /* If this symbol is not defined in a regular file, and we are
+ not generating a shared library, then set the symbol to this
+ location in the .plt. This is required to make function
+ pointers compare as equal between the normal executable and
+ the shared library. */
+ if (! info->shared
+ && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
+ {
+ h->root.u.def.section = s;
+ h->root.u.def.value = h->plt.offset;
+ }
+
+ /* 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. */
+ s = htab->sgotplt;
+ if (s == NULL)
+ abort ();
+ s->_raw_size += 4;
+
+ if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info, h))
+ {
+ /* We also need to make an entry in the .rel.plt section. */
+ s = htab->srelplt;
+ if (s == NULL)
+ abort ();
+ s->_raw_size += sizeof (Elf32_External_Rel);
+ }
+ }
+ else
+ {
+ h->plt.offset = (bfd_vma) -1;
+ h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
+ }
+
+ if (h->got.refcount > 0)
+ {
+ boolean dyn;
+
+ /* Make sure this symbol is output as a dynamic symbol.
+ Undefined weak syms won't yet be marked as dynamic. */
+ if (h->dynindx == -1
+ && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
+ {
+ if (! bfd_elf32_link_record_dynamic_symbol (info, h))
+ return false;
+ }
+
+ s = htab->sgot;
+ h->got.offset = s->_raw_size;
+ s->_raw_size += 4;
+ dyn = htab->root.dynamic_sections_created;
+ if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h))
+ htab->srelgot->_raw_size += sizeof (Elf32_External_Rel);
+ }
+ else
+ h->got.offset = (bfd_vma) -1;
+
+ /* In the shared -Bsymbolic case, discard space allocated for
+ dynamic relocs against symbols which turn out to be defined
+ in regular objects. For the normal shared case, discard space
+ for relocs that have become local due to symbol visibility
+ changes. For the non-shared case, discard space for symbols
+ which turn out to need copy relocs or are not dynamic. */
+
+ eh = (struct elf_i386_link_hash_entry *) h;
+ if (eh->dyn_relocs == NULL)
+ return true;
+
+ if (!info->shared
+ && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
+ && ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
+ || (htab->root.dynamic_sections_created
+ && (h->root.type == bfd_link_hash_undefweak
+ || h->root.type == bfd_link_hash_undefined))))
+ {
+ /* Make sure this symbol is output as a dynamic symbol.
+ Undefined weak syms won't yet be marked as dynamic. */
+ if (h->dynindx == -1
+ && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
+ {
+ if (! bfd_elf32_link_record_dynamic_symbol (info, h))
+ return false;
+ }
+
+ /* If that succeeded, we know we'll be keeping all the relocs. */
+ if (h->dynindx != -1)
+ return true;
+ }
+
+ if (!info->shared
+ || ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0
+ && ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0
+ || info->symbolic)))
+ {
+ struct elf_i386_dyn_relocs *c;
+
+ for (c = eh->dyn_relocs; c != NULL; c = c->next)
+ c->section->_raw_size -= c->count * sizeof (Elf32_External_Rel);
+ }
+
+ return true;
+}
+
/* Set the sizes of the dynamic sections. */
static boolean
bfd *output_bfd;
struct bfd_link_info *info;
{
+ struct elf_i386_link_hash_table *htab;
bfd *dynobj;
asection *s;
- boolean plt;
boolean relocs;
boolean reltext;
+ bfd *i;
- dynobj = elf_hash_table (info)->dynobj;
- BFD_ASSERT (dynobj != NULL);
+ htab = elf_i386_hash_table (info);
+ dynobj = htab->root.dynobj;
+ if (dynobj == NULL)
+ abort ();
- if (elf_hash_table (info)->dynamic_sections_created)
+ if (htab->root.dynamic_sections_created)
{
/* 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);
+ if (s == NULL)
+ abort ();
s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
}
}
- else
+
+ /* Set up .got offsets for local syms. */
+ for (i = info->input_bfds; i; i = i->link_next)
{
- /* 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;
+ bfd_signed_vma *local_got;
+ bfd_signed_vma *end_local_got;
+ bfd_size_type locsymcount;
+ Elf_Internal_Shdr *symtab_hdr;
+ asection *srel;
+
+ if (bfd_get_flavour (i) != bfd_target_elf_flavour)
+ continue;
+
+ local_got = elf_local_got_refcounts (i);
+ if (!local_got)
+ continue;
+
+ symtab_hdr = &elf_tdata (i)->symtab_hdr;
+ locsymcount = symtab_hdr->sh_info;
+ end_local_got = local_got + locsymcount;
+ s = htab->sgot;
+ srel = htab->srelgot;
+ for (; local_got < end_local_got; ++local_got)
+ {
+ if (*local_got > 0)
+ {
+ *local_got = s->_raw_size;
+ s->_raw_size += 4;
+ if (info->shared)
+ srel->_raw_size += sizeof (Elf32_External_Rel);
+ }
+ else
+ *local_got = (bfd_vma) -1;
+ }
}
- /* If this is a -Bsymbolic shared link, then we need to discard all
- PC relative relocs against symbols defined in a regular object.
- We allocated space for them in the check_relocs routine, but we
- will not fill them in in the relocate_section routine. */
- if (info->shared && info->symbolic)
- elf_i386_link_hash_traverse (elf_i386_hash_table (info),
- elf_i386_discard_copies,
- (PTR) NULL);
-
- /* The check_relocs and adjust_dynamic_symbol entry points have
- determined the sizes of the various dynamic sections. Allocate
- memory for them. */
- plt = false;
+ /* Allocate global sym .plt and .got entries. Also discard all
+ unneeded relocs. */
+ elf_link_hash_traverse (&htab->root,
+ allocate_plt_and_got_and_discard_relocs,
+ (PTR) info);
+
+ /* We now have determined the sizes of the various dynamic sections.
+ Allocate memory for them. */
relocs = false;
reltext = false;
for (s = dynobj->sections; s != NULL; s = s->next)
{
- const char *name;
- boolean strip;
-
if ((s->flags & SEC_LINKER_CREATED) == 0)
continue;
- /* It's OK to base decisions on the section name, because none
- of the dynobj section names depend upon the input files. */
- name = bfd_get_section_name (dynobj, s);
-
- strip = false;
-
- if (strcmp (name, ".plt") == 0)
+ if (s == htab->splt
+ || s == htab->sgot
+ || s == htab->sgotplt)
{
- if (s->_raw_size == 0)
- {
- /* Strip this section if we don't need it; see the
- comment below. */
- strip = true;
- }
- else
- {
- /* Remember whether there is a PLT. */
- plt = true;
- }
+ /* Strip this section if we don't need it; see the
+ comment below. */
}
- else if (strncmp (name, ".rel", 4) == 0)
+ else if (strncmp (bfd_get_section_name (dynobj, s), ".rel", 4) == 0)
{
if (s->_raw_size == 0)
{
adjust_dynamic_symbol is called, and it is that
function which decides whether anything needs to go
into these sections. */
- strip = true;
}
else
{
asection *target;
/* Remember whether there are any reloc sections other
- than .rel.plt. */
- if (strcmp (name, ".rel.plt") != 0)
+ than .rel.plt. */
+ if (s != htab->srelplt)
{
const char *outname;
s->reloc_count = 0;
}
}
- else if (strncmp (name, ".got", 4) != 0)
+ else
{
/* It's not one of our sections, so don't allocate space. */
continue;
}
- if (strip)
+ if (s->_raw_size == 0)
{
_bfd_strip_section_from_output (info, s);
continue;
}
- /* Allocate memory for the section contents. */
- s->contents = (bfd_byte *) bfd_alloc (dynobj, s->_raw_size);
- if (s->contents == NULL && s->_raw_size != 0)
+ /* Allocate memory for the section contents. We use bfd_zalloc
+ here in case unused entries are not reclaimed before the
+ section's contents are written out. This should not happen,
+ but this way if it does, we get a R_386_NONE reloc instead
+ of garbage. */
+ s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size);
+ if (s->contents == NULL)
return false;
}
- if (elf_hash_table (info)->dynamic_sections_created)
+ if (htab->root.dynamic_sections_created)
{
/* Add some entries to the .dynamic section. We fill in the
values later, in elf_i386_finish_dynamic_sections, but we
return false;
}
- if (plt)
+ if (htab->splt->_raw_size != 0)
{
if (! bfd_elf32_add_dynamic_entry (info, DT_PLTGOT, 0)
|| ! bfd_elf32_add_dynamic_entry (info, DT_PLTRELSZ, 0)
{
if (! bfd_elf32_add_dynamic_entry (info, DT_TEXTREL, 0))
return false;
+ info->flags |= DF_TEXTREL;
}
}
return true;
}
-/* This function is called via elf_i386_link_hash_traverse if we are
- creating a shared object with -Bsymbolic. It discards the space
- allocated to copy PC relative relocs against symbols which are
- defined in regular objects. We allocated space for them in the
- check_relocs routine, but we won't fill them in in the
- relocate_section routine. */
-
-/*ARGSUSED*/
-static boolean
-elf_i386_discard_copies (h, ignore)
- struct elf_i386_link_hash_entry *h;
- PTR ignore ATTRIBUTE_UNUSED;
-{
- struct elf_i386_pcrel_relocs_copied *s;
-
- /* We only discard relocs for symbols defined in a regular object. */
- if ((h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
- return true;
-
- for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
- s->section->_raw_size -= s->count * sizeof (Elf32_External_Rel);
-
- return true;
-}
-
/* Relocate an i386 ELF section. */
static boolean
Elf_Internal_Sym *local_syms;
asection **local_sections;
{
+ struct elf_i386_link_hash_table *htab;
bfd *dynobj;
Elf_Internal_Shdr *symtab_hdr;
struct elf_link_hash_entry **sym_hashes;
bfd_vma *local_got_offsets;
- asection *sgot;
- asection *splt;
asection *sreloc;
Elf_Internal_Rela *rel;
Elf_Internal_Rela *relend;
- dynobj = elf_hash_table (info)->dynobj;
+ htab = elf_i386_hash_table (info);
+ dynobj = htab->root.dynobj;
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
sym_hashes = elf_sym_hashes (input_bfd);
local_got_offsets = elf_local_got_offsets (input_bfd);
- sgot = NULL;
- splt = NULL;
sreloc = NULL;
-
rel = relocs;
relend = relocs + input_section->reloc_count;
for (; rel < relend; rel++)
struct elf_link_hash_entry *h;
Elf_Internal_Sym *sym;
asection *sec;
+ bfd_vma off;
bfd_vma relocation;
+ boolean unresolved_reloc;
bfd_reloc_status_type r;
+ unsigned int indx;
r_type = ELF32_R_TYPE (rel->r_info);
- if (r_type == R_386_GNU_VTINHERIT
- || r_type == R_386_GNU_VTENTRY)
+ if (r_type == (int) R_386_GNU_VTINHERIT
+ || r_type == (int) R_386_GNU_VTENTRY)
continue;
- if (r_type < 0
- || r_type >= (int) R_386_max
- || (r_type >= (int) FIRST_INVALID_RELOC
- && r_type <= (int) LAST_INVALID_RELOC))
+
+ if ((indx = (unsigned) r_type) >= R_386_standard
+ && ((indx = (unsigned) r_type - R_386_ext_offset) - R_386_standard
+ >= R_386_ext - R_386_standard))
{
bfd_set_error (bfd_error_bad_value);
return false;
}
- howto = elf_howto_table + r_type;
+ howto = elf_howto_table + indx;
r_symndx = ELF32_R_SYM (rel->r_info);
h = NULL;
sym = NULL;
sec = NULL;
+ unresolved_reloc = false;
if (r_symndx < symtab_hdr->sh_info)
{
sym = local_syms + r_symndx;
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;
+
+ relocation = 0;
if (h->root.type == bfd_link_hash_defined
|| h->root.type == bfd_link_hash_defweak)
{
sec = h->root.u.def.section;
- if (r_type == R_386_GOTPC
- || (r_type == R_386_PLT32
- && h->plt.offset != (bfd_vma) -1)
- || (r_type == R_386_GOT32
- && elf_hash_table (info)->dynamic_sections_created
- && (! info->shared
- || (! info->symbolic && h->dynindx != -1)
- || (h->elf_link_hash_flags
- & ELF_LINK_HASH_DEF_REGULAR) == 0))
- || (info->shared
- && ((! info->symbolic && h->dynindx != -1)
- || (h->elf_link_hash_flags
- & ELF_LINK_HASH_DEF_REGULAR) == 0)
- && (r_type == R_386_32
- || r_type == R_386_PC32)
- && ((input_section->flags & SEC_ALLOC) != 0
- /* DWARF will emit R_386_32 relocations in its
- sections against symbols defined externally
- in shared libraries. We can't do anything
- with them here. */
- || (input_section->flags & SEC_DEBUGGING) != 0)))
- {
- /* In these cases, we don't need the relocation
- value. We check specially because in some
- obscure cases sec->output_section will be NULL. */
- relocation = 0;
- }
- else if (sec->output_section == NULL)
- {
- (*_bfd_error_handler)
- (_("%s: warning: unresolvable relocation against symbol `%s' from %s section"),
- bfd_get_filename (input_bfd), h->root.root.string,
- bfd_get_section_name (input_bfd, input_section));
- relocation = 0;
- }
+ if (sec->output_section == NULL)
+ /* Set a flag that will be cleared later if we find a
+ relocation value for this symbol. output_section
+ is typically NULL for symbols satisfied by a shared
+ library. */
+ unresolved_reloc = true;
else
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->shared && !info->symbolic && !info->no_undefined)
- relocation = 0;
+ ;
+ else if (info->shared && !info->symbolic
+ && !info->no_undefined
+ && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
+ ;
else
{
if (! ((*info->callbacks->undefined_symbol)
(info, h->root.root.string, input_bfd,
- input_section, rel->r_offset)))
+ input_section, rel->r_offset,
+ (!info->shared || info->no_undefined
+ || ELF_ST_VISIBILITY (h->other)))))
return false;
- relocation = 0;
}
}
case R_386_GOT32:
/* Relocation is to the entry for this symbol in the global
offset table. */
- if (sgot == NULL)
- {
- sgot = bfd_get_section_by_name (dynobj, ".got");
- BFD_ASSERT (sgot != NULL);
- }
+ if (htab->sgot == NULL)
+ abort ();
if (h != NULL)
{
- bfd_vma off;
+ boolean dyn;
off = h->got.offset;
- BFD_ASSERT (off != (bfd_vma) -1);
-
- if (! elf_hash_table (info)->dynamic_sections_created
+ dyn = htab->root.dynamic_sections_created;
+ if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h)
|| (info->shared
- && (info->symbolic || h->dynindx == -1)
+ && (info->symbolic
+ || h->dynindx == -1
+ || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL))
&& (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)))
{
/* This is actually a static link, or it is a
else
{
bfd_put_32 (output_bfd, relocation,
- sgot->contents + off);
+ htab->sgot->contents + off);
h->got.offset |= 1;
}
}
-
- relocation = sgot->output_offset + off;
+ else
+ unresolved_reloc = false;
}
else
{
- bfd_vma off;
-
- BFD_ASSERT (local_got_offsets != NULL
- && local_got_offsets[r_symndx] != (bfd_vma) -1);
+ if (local_got_offsets == NULL)
+ abort ();
off = local_got_offsets[r_symndx];
/* The offset must always be a multiple of 4. We use
- the least significant bit to record whether we have
- already generated the necessary reloc. */
+ the least significant bit to record whether we have
+ already generated the necessary reloc. */
if ((off & 1) != 0)
off &= ~1;
else
{
- bfd_put_32 (output_bfd, relocation, sgot->contents + off);
+ bfd_put_32 (output_bfd, relocation,
+ htab->sgot->contents + off);
if (info->shared)
{
asection *srelgot;
Elf_Internal_Rel outrel;
- srelgot = bfd_get_section_by_name (dynobj, ".rel.got");
- BFD_ASSERT (srelgot != NULL);
+ srelgot = htab->srelgot;
+ if (srelgot == NULL)
+ abort ();
- outrel.r_offset = (sgot->output_section->vma
- + sgot->output_offset
+ outrel.r_offset = (htab->sgot->output_section->vma
+ + htab->sgot->output_offset
+ off);
outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
bfd_elf32_swap_reloc_out (output_bfd, &outrel,
local_got_offsets[r_symndx] |= 1;
}
-
- relocation = sgot->output_offset + off;
}
+ if (off >= (bfd_vma) -2)
+ abort ();
+
+ relocation = htab->sgot->output_offset + off;
break;
case R_386_GOTOFF:
/* Relocation is relative to the start of the global offset
table. */
- if (sgot == NULL)
- {
- sgot = bfd_get_section_by_name (dynobj, ".got");
- BFD_ASSERT (sgot != NULL);
- }
-
/* Note that sgot->output_offset is not involved in this
calculation. We always want the start of .got. If we
defined _GLOBAL_OFFSET_TABLE in a different way, as is
permitted by the ABI, we might have to change this
calculation. */
- relocation -= sgot->output_section->vma;
-
+ relocation -= htab->sgot->output_section->vma;
break;
case R_386_GOTPC:
/* Use global offset table as symbol value. */
-
- if (sgot == NULL)
- {
- sgot = bfd_get_section_by_name (dynobj, ".got");
- BFD_ASSERT (sgot != NULL);
- }
-
- relocation = sgot->output_section->vma;
-
+ relocation = htab->sgot->output_section->vma;
+ unresolved_reloc = false;
break;
case R_386_PLT32:
/* Relocation is to the entry for this symbol in the
procedure linkage table. */
- /* Resolve a PLT32 reloc again a local symbol directly,
- without using the procedure linkage table. */
+ /* Resolve a PLT32 reloc against a local symbol directly,
+ without using the procedure linkage table. */
if (h == NULL)
break;
- if (h->plt.offset == (bfd_vma) -1)
+ if (h->plt.offset == (bfd_vma) -1
+ || htab->splt == NULL)
{
/* We didn't make a PLT entry for this symbol. This
- happens when statically linking PIC code, or when
- using -Bsymbolic. */
+ happens when statically linking PIC code, or when
+ using -Bsymbolic. */
break;
}
- if (splt == NULL)
- {
- splt = bfd_get_section_by_name (dynobj, ".plt");
- BFD_ASSERT (splt != NULL);
- }
-
- relocation = (splt->output_section->vma
- + splt->output_offset
+ relocation = (htab->splt->output_section->vma
+ + htab->splt->output_offset
+ h->plt.offset);
-
+ unresolved_reloc = false;
break;
case R_386_32:
case R_386_PC32:
- if (info->shared
- && (input_section->flags & SEC_ALLOC) != 0
- && (r_type != R_386_PC32
- || (h != NULL
- && h->dynindx != -1
- && (! info->symbolic
- || (h->elf_link_hash_flags
- & ELF_LINK_HASH_DEF_REGULAR) == 0))))
+ if ((info->shared
+ && (input_section->flags & SEC_ALLOC) != 0
+ && (r_type != R_386_PC32
+ || (h != NULL
+ && h->dynindx != -1
+ && (! info->symbolic
+ || (h->elf_link_hash_flags
+ & ELF_LINK_HASH_DEF_REGULAR) == 0))))
+ || (!info->shared
+ && (input_section->flags & SEC_ALLOC) != 0
+ && h != NULL
+ && h->dynindx != -1
+ && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
+ && ((h->elf_link_hash_flags
+ & ELF_LINK_HASH_DEF_DYNAMIC) != 0
+ || h->root.type == bfd_link_hash_undefweak
+ || h->root.type == bfd_link_hash_undefined)))
{
Elf_Internal_Rel outrel;
boolean skip, relocate;
if (name == NULL)
return false;
- BFD_ASSERT (strncmp (name, ".rel", 4) == 0
- && strcmp (bfd_get_section_name (input_bfd,
- input_section),
- name + 4) == 0);
+ if (strncmp (name, ".rel", 4) != 0
+ || strcmp (bfd_get_section_name (input_bfd,
+ input_section),
+ name + 4) != 0)
+ {
+ if (input_bfd->my_archive)
+ (*_bfd_error_handler)\
+ (_("%s(%s): bad relocation section name `%s\'"),
+ bfd_get_filename (input_bfd->my_archive),
+ bfd_get_filename (input_bfd),
+ name);
+ else
+ (*_bfd_error_handler)
+ (_("%s: bad relocation section name `%s\'"),
+ bfd_get_filename (input_bfd),
+ name);
+ return false;
+ }
sreloc = bfd_get_section_by_name (dynobj, name);
- BFD_ASSERT (sreloc != NULL);
+ if (sreloc == NULL)
+ abort ();
}
skip = false;
bfd_vma off;
off = (_bfd_stab_section_offset
- (output_bfd, &elf_hash_table (info)->stab_info,
- input_section,
+ (output_bfd, htab->root.stab_info, input_section,
&elf_section_data (input_section)->stab_info,
rel->r_offset));
if (off == (bfd_vma) -1)
memset (&outrel, 0, sizeof outrel);
relocate = false;
}
- else if (r_type == R_386_PC32)
+ else if (h != NULL
+ && h->dynindx != -1
+ && (r_type == R_386_PC32
+ || !info->shared
+ || !info->symbolic
+ || (h->elf_link_hash_flags
+ & ELF_LINK_HASH_DEF_REGULAR) == 0))
+
{
- BFD_ASSERT (h != NULL && h->dynindx != -1);
relocate = false;
- outrel.r_info = ELF32_R_INFO (h->dynindx, R_386_PC32);
+ outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
}
else
{
- /* h->dynindx may be -1 if this symbol was marked to
- become local. */
- if (h == NULL
- || ((info->symbolic || h->dynindx == -1)
- && (h->elf_link_hash_flags
- & ELF_LINK_HASH_DEF_REGULAR) != 0))
- {
- relocate = true;
- outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
- }
- else
- {
- BFD_ASSERT (h->dynindx != -1);
- relocate = false;
- outrel.r_info = ELF32_R_INFO (h->dynindx, R_386_32);
- }
+ /* This symbol is local, or marked to become local. */
+ relocate = true;
+ outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
}
bfd_elf32_swap_reloc_out (output_bfd, &outrel,
break;
}
+ /* FIXME: Why do we allow debugging sections to escape this error?
+ More importantly, why do we not emit dynamic relocs for
+ R_386_32 above in debugging sections (which are ! SEC_ALLOC)?
+ If we had emitted the dynamic reloc, we could remove the
+ fudge here. */
+ if (unresolved_reloc
+ && !(info->shared
+ && (input_section->flags & SEC_DEBUGGING) != 0
+ && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
+ (*_bfd_error_handler)
+ (_("%s(%s+0x%lx): unresolvable relocation against symbol `%s'"),
+ bfd_get_filename (input_bfd),
+ bfd_get_section_name (input_bfd, input_section),
+ (long) rel->r_offset,
+ h->root.root.string);
+
r = _bfd_final_link_relocate (howto, input_bfd, input_section,
contents, rel->r_offset,
relocation, (bfd_vma) 0);
- if (r != bfd_reloc_ok)
+ switch (r)
{
- switch (r)
- {
- default:
- case bfd_reloc_outofrange:
- abort ();
- case bfd_reloc_overflow:
+ case bfd_reloc_ok:
+ break;
+
+ case bfd_reloc_overflow:
+ {
+ const char *name;
+
+ if (h != NULL)
+ name = h->root.root.string;
+ else
{
- const char *name;
-
- if (h != NULL)
- name = h->root.root.string;
- else
- {
- name = bfd_elf_string_from_elf_section (input_bfd,
- symtab_hdr->sh_link,
- sym->st_name);
- if (name == NULL)
- return false;
- if (*name == '\0')
- name = bfd_section_name (input_bfd, sec);
- }
- if (! ((*info->callbacks->reloc_overflow)
- (info, name, howto->name, (bfd_vma) 0,
- input_bfd, input_section, rel->r_offset)))
+ name = bfd_elf_string_from_elf_section (input_bfd,
+ symtab_hdr->sh_link,
+ sym->st_name);
+ if (name == NULL)
return false;
+ if (*name == '\0')
+ name = bfd_section_name (input_bfd, sec);
}
- break;
- }
+ if (! ((*info->callbacks->reloc_overflow)
+ (info, name, howto->name, (bfd_vma) 0,
+ input_bfd, input_section, rel->r_offset)))
+ return false;
+ }
+ break;
+
+ default:
+ case bfd_reloc_outofrange:
+ abort ();
+ break;
}
}
struct elf_link_hash_entry *h;
Elf_Internal_Sym *sym;
{
+ struct elf_i386_link_hash_table *htab;
bfd *dynobj;
- dynobj = elf_hash_table (info)->dynobj;
+ htab = elf_i386_hash_table (info);
+ dynobj = htab->root.dynobj;
if (h->plt.offset != (bfd_vma) -1)
{
- asection *splt;
- asection *sgot;
- asection *srel;
bfd_vma plt_index;
bfd_vma got_offset;
Elf_Internal_Rel rel;
/* This symbol has an entry in the procedure linkage table. Set
it up. */
- BFD_ASSERT (h->dynindx != -1);
-
- splt = bfd_get_section_by_name (dynobj, ".plt");
- sgot = bfd_get_section_by_name (dynobj, ".got.plt");
- srel = bfd_get_section_by_name (dynobj, ".rel.plt");
- BFD_ASSERT (splt != NULL && sgot != NULL && srel != NULL);
+ if (h->dynindx == -1
+ || htab->splt == NULL
+ || htab->sgotplt == NULL
+ || htab->srelplt == NULL)
+ abort ();
/* Get the index in the procedure linkage table which
corresponds to this symbol. This is the index of this symbol
/* Fill in the entry in the procedure linkage table. */
if (! info->shared)
{
- memcpy (splt->contents + h->plt.offset, elf_i386_plt_entry,
+ memcpy (htab->splt->contents + h->plt.offset, elf_i386_plt_entry,
PLT_ENTRY_SIZE);
bfd_put_32 (output_bfd,
- (sgot->output_section->vma
- + sgot->output_offset
+ (htab->sgotplt->output_section->vma
+ + htab->sgotplt->output_offset
+ got_offset),
- splt->contents + h->plt.offset + 2);
+ htab->splt->contents + h->plt.offset + 2);
}
else
{
- memcpy (splt->contents + h->plt.offset, elf_i386_pic_plt_entry,
+ memcpy (htab->splt->contents + h->plt.offset, elf_i386_pic_plt_entry,
PLT_ENTRY_SIZE);
bfd_put_32 (output_bfd, got_offset,
- splt->contents + h->plt.offset + 2);
+ htab->splt->contents + h->plt.offset + 2);
}
bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rel),
- splt->contents + h->plt.offset + 7);
+ htab->splt->contents + h->plt.offset + 7);
bfd_put_32 (output_bfd, - (h->plt.offset + PLT_ENTRY_SIZE),
- splt->contents + h->plt.offset + 12);
+ htab->splt->contents + h->plt.offset + 12);
/* Fill in the entry in the global offset table. */
bfd_put_32 (output_bfd,
- (splt->output_section->vma
- + splt->output_offset
+ (htab->splt->output_section->vma
+ + htab->splt->output_offset
+ h->plt.offset
+ 6),
- sgot->contents + got_offset);
+ htab->sgotplt->contents + got_offset);
/* Fill in the entry in the .rel.plt section. */
- rel.r_offset = (sgot->output_section->vma
- + sgot->output_offset
+ rel.r_offset = (htab->sgotplt->output_section->vma
+ + htab->sgotplt->output_offset
+ got_offset);
rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT);
bfd_elf32_swap_reloc_out (output_bfd, &rel,
- ((Elf32_External_Rel *) srel->contents
+ ((Elf32_External_Rel *) htab->srelplt->contents
+ plt_index));
if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
if (h->got.offset != (bfd_vma) -1)
{
- asection *sgot;
- asection *srel;
Elf_Internal_Rel rel;
/* This symbol has an entry in the global offset table. Set it
up. */
- sgot = bfd_get_section_by_name (dynobj, ".got");
- srel = bfd_get_section_by_name (dynobj, ".rel.got");
- BFD_ASSERT (sgot != NULL && srel != NULL);
+ if (htab->sgot == NULL || htab->srelgot == NULL)
+ abort ();
- rel.r_offset = (sgot->output_section->vma
- + sgot->output_offset
+ rel.r_offset = (htab->sgot->output_section->vma
+ + htab->sgot->output_offset
+ (h->got.offset &~ 1));
- /* If this is a -Bsymbolic link, and the symbol is defined
- locally, we just want to emit a RELATIVE reloc. Likewise if
- the symbol was forced to be local because of a version file.
+ /* If this is a static link, or it is a -Bsymbolic link and the
+ symbol is defined locally or was forced to be local because
+ of a version file, we just want to emit a RELATIVE reloc.
The entry in the global offset table will already have been
initialized in the relocate_section function. */
if (info->shared
- && (info->symbolic || h->dynindx == -1)
+ && (info->symbolic
+ || h->dynindx == -1
+ || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL))
&& (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
- rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
+ {
+ BFD_ASSERT((h->got.offset & 1) != 0);
+ rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
+ }
else
{
- bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
+ BFD_ASSERT((h->got.offset & 1) == 0);
+ bfd_put_32 (output_bfd, (bfd_vma) 0,
+ htab->sgot->contents + h->got.offset);
rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT);
}
bfd_elf32_swap_reloc_out (output_bfd, &rel,
- ((Elf32_External_Rel *) srel->contents
- + srel->reloc_count));
- ++srel->reloc_count;
+ ((Elf32_External_Rel *) htab->srelgot->contents
+ + htab->srelgot->reloc_count));
+ ++htab->srelgot->reloc_count;
}
if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
{
- asection *s;
Elf_Internal_Rel rel;
/* This symbol needs a copy reloc. Set it up. */
- BFD_ASSERT (h->dynindx != -1
- && (h->root.type == bfd_link_hash_defined
- || h->root.type == bfd_link_hash_defweak));
-
- s = bfd_get_section_by_name (h->root.u.def.section->owner,
- ".rel.bss");
- BFD_ASSERT (s != NULL);
+ if (h->dynindx == -1
+ || (h->root.type != bfd_link_hash_defined
+ && h->root.type != bfd_link_hash_defweak)
+ || htab->srelbss == NULL)
+ abort ();
rel.r_offset = (h->root.u.def.value
+ h->root.u.def.section->output_section->vma
+ h->root.u.def.section->output_offset);
rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY);
bfd_elf32_swap_reloc_out (output_bfd, &rel,
- ((Elf32_External_Rel *) s->contents
- + s->reloc_count));
- ++s->reloc_count;
+ ((Elf32_External_Rel *) htab->srelbss->contents
+ + htab->srelbss->reloc_count));
+ ++htab->srelbss->reloc_count;
}
/* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
bfd *output_bfd;
struct bfd_link_info *info;
{
+ struct elf_i386_link_hash_table *htab;
bfd *dynobj;
- asection *sgot;
asection *sdyn;
- dynobj = elf_hash_table (info)->dynobj;
-
- sgot = bfd_get_section_by_name (dynobj, ".got.plt");
- BFD_ASSERT (sgot != NULL);
+ htab = elf_i386_hash_table (info);
+ dynobj = htab->root.dynobj;
sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
- if (elf_hash_table (info)->dynamic_sections_created)
+ if (htab->root.dynamic_sections_created)
{
- asection *splt;
Elf32_External_Dyn *dyncon, *dynconend;
- BFD_ASSERT (sdyn != NULL);
+ if (sdyn == NULL || htab->sgot == NULL)
+ abort ();
dyncon = (Elf32_External_Dyn *) sdyn->contents;
dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
for (; dyncon < dynconend; dyncon++)
{
Elf_Internal_Dyn dyn;
- const char *name;
- asection *s;
bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
break;
case DT_PLTGOT:
- name = ".got";
- goto get_vma;
+ dyn.d_un.d_ptr = htab->sgot->output_section->vma;
+ bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
+ break;
+
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;
+ dyn.d_un.d_ptr = htab->srelplt->output_section->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;
+ if (htab->srelplt->output_section->_cooked_size != 0)
+ dyn.d_un.d_val = htab->srelplt->output_section->_cooked_size;
else
- dyn.d_un.d_val = s->_raw_size;
+ dyn.d_un.d_val = htab->srelplt->output_section->_raw_size;
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
break;
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 (htab->srelplt != NULL)
{
- if (s->_cooked_size != 0)
- dyn.d_un.d_val -= s->_cooked_size;
+ if (htab->srelplt->output_section->_cooked_size != 0)
+ dyn.d_un.d_val -= htab->srelplt->output_section->_cooked_size;
else
- dyn.d_un.d_val -= s->_raw_size;
+ dyn.d_un.d_val -= htab->srelplt->output_section->_raw_size;
}
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
break;
}
/* Fill in the first entry in the procedure linkage table. */
- splt = bfd_get_section_by_name (dynobj, ".plt");
- if (splt && splt->_raw_size > 0)
+ if (htab->splt && htab->splt->_raw_size > 0)
{
if (info->shared)
- memcpy (splt->contents, elf_i386_pic_plt0_entry, PLT_ENTRY_SIZE);
+ memcpy (htab->splt->contents,
+ elf_i386_pic_plt0_entry, PLT_ENTRY_SIZE);
else
{
- memcpy (splt->contents, elf_i386_plt0_entry, PLT_ENTRY_SIZE);
+ memcpy (htab->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);
+ (htab->sgotplt->output_section->vma
+ + htab->sgotplt->output_offset
+ + 4),
+ htab->splt->contents + 2);
bfd_put_32 (output_bfd,
- sgot->output_section->vma + sgot->output_offset + 8,
- splt->contents + 8);
+ (htab->sgotplt->output_section->vma
+ + htab->sgotplt->output_offset
+ + 8),
+ htab->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;
+ elf_section_data (htab->splt->output_section)
+ ->this_hdr.sh_entsize = 4;
}
}
- /* Fill in the first three entries in the global offset table. */
- if (sgot->_raw_size > 0)
+ if (htab->sgotplt)
{
- 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);
+ /* Fill in the first three entries in the global offset table. */
+ if (htab->sgotplt->_raw_size > 0)
+ {
+ bfd_put_32 (output_bfd,
+ (sdyn == NULL ? (bfd_vma) 0
+ : sdyn->output_section->vma + sdyn->output_offset),
+ htab->sgotplt->contents);
+ bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 4);
+ bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 8);
+ }
+
+ elf_section_data (htab->sgotplt->output_section)->this_hdr.sh_entsize = 4;
}
+ return true;
+}
- elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
+/* Set the correct type for an x86 ELF section. We do this by the
+ section name, which is a hack, but ought to work. */
+
+static boolean
+elf_i386_fake_sections (abfd, hdr, sec)
+ bfd *abfd ATTRIBUTE_UNUSED;
+ Elf32_Internal_Shdr *hdr;
+ asection *sec;
+{
+ register const char *name;
+
+ name = bfd_get_section_name (abfd, sec);
+
+ if (strcmp (name, ".reloc") == 0)
+ /*
+ * This is an ugly, but unfortunately necessary hack that is
+ * needed when producing EFI binaries on x86. It tells
+ * elf.c:elf_fake_sections() not to consider ".reloc" as a section
+ * containing ELF relocation info. We need this hack in order to
+ * be able to generate ELF binaries that can be translated into
+ * EFI applications (which are essentially COFF objects). Those
+ * files contain a COFF ".reloc" section inside an ELFNN object,
+ * which would normally cause BFD to segfault because it would
+ * attempt to interpret this section as containing relocation
+ * entries for section "oc". With this hack enabled, ".reloc"
+ * will be treated as a normal data section, which will avoid the
+ * segfault. However, you won't be able to create an ELFNN binary
+ * with a section named "oc" that needs relocations, but that's
+ * the kind of ugly side-effects you get when detecting section
+ * types based on their names... In practice, this limitation is
+ * unlikely to bite.
+ */
+ hdr->sh_type = SHT_PROGBITS;
return true;
}
+
#define TARGET_LITTLE_SYM bfd_elf32_i386_vec
#define TARGET_LITTLE_NAME "elf32-i386"
#define ELF_ARCH bfd_arch_i386
#define ELF_MACHINE_CODE EM_386
#define ELF_MAXPAGESIZE 0x1000
-#define elf_info_to_howto elf_i386_info_to_howto
-#define elf_info_to_howto_rel elf_i386_info_to_howto_rel
-#define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
-#define bfd_elf32_bfd_is_local_label_name \
- elf_i386_is_local_label_name
-#define elf_backend_create_dynamic_sections \
- _bfd_elf_create_dynamic_sections
-#define bfd_elf32_bfd_link_hash_table_create \
- elf_i386_link_hash_table_create
-#define elf_backend_check_relocs elf_i386_check_relocs
-#define elf_backend_adjust_dynamic_symbol \
- elf_i386_adjust_dynamic_symbol
-#define elf_backend_size_dynamic_sections \
- elf_i386_size_dynamic_sections
-#define elf_backend_relocate_section elf_i386_relocate_section
-#define elf_backend_finish_dynamic_symbol \
- elf_i386_finish_dynamic_symbol
-#define elf_backend_finish_dynamic_sections \
- elf_i386_finish_dynamic_sections
-#define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
-#define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook
#define elf_backend_can_gc_sections 1
#define elf_backend_want_got_plt 1
#define elf_backend_got_header_size 12
#define elf_backend_plt_header_size PLT_ENTRY_SIZE
+#define elf_info_to_howto elf_i386_info_to_howto
+#define elf_info_to_howto_rel elf_i386_info_to_howto_rel
+
+#define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
+#define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
+#define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
+
+#define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
+#define elf_backend_check_relocs elf_i386_check_relocs
+#define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
+#define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
+#define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
+#define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
+#define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook
+#define elf_backend_relocate_section elf_i386_relocate_section
+#define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
+#define elf_backend_fake_sections elf_i386_fake_sections
+
#include "elf32-target.h"
projects / deliverable / binutils-gdb.git / blobdiff