/* Intel 80386/80486-specific support for 32-bit ELF
- Copyright 1993 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.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
-Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#include "bfd.h"
#include "sysdep.h"
+#include "bfdlink.h"
#include "libbfd.h"
-#include "libelf.h"
+#include "elf-bfd.h"
+
+static reloc_howto_type *elf_i386_reloc_type_lookup
+ PARAMS ((bfd *, bfd_reloc_code_real_type));
+static void elf_i386_info_to_howto
+ PARAMS ((bfd *, arelent *, Elf32_Internal_Rela *));
+static void elf_i386_info_to_howto_rel
+ PARAMS ((bfd *, arelent *, Elf32_Internal_Rel *));
+static boolean elf_i386_is_local_label_name PARAMS ((bfd *, const char *));
+static struct bfd_hash_entry *elf_i386_link_hash_newfunc
+ 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 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
+ PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
+ Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
+static boolean elf_i386_finish_dynamic_symbol
+ PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
+ Elf_Internal_Sym *));
+static boolean elf_i386_finish_dynamic_sections
+ PARAMS ((bfd *, struct bfd_link_info *));
#define USE_REL 1 /* 386 uses REL relocations instead of RELA */
-enum reloc_type
- {
- R_386_NONE = 0,
- R_386_32,
- R_386_PC32,
- R_386_GOT32,
- R_386_PLT32,
- R_386_COPY,
- R_386_GLOB_DAT,
- R_386_JUMP_SLOT,
- R_386_RELATIVE,
- R_386_GOTOFF,
- R_386_GOTPC,
- R_386_max
- };
-
-#if 0
-static CONST char *CONST reloc_type_names[] =
-{
- "R_386_NONE",
- "R_386_32",
- "R_386_PC32",
- "R_386_GOT32",
- "R_386_PLT32",
- "R_386_COPY",
- "R_386_GLOB_DAT",
- "R_386_JUMP_SLOT",
- "R_386_RELATIVE",
- "R_386_GOTOFF",
- "R_386_GOTPC",
-};
-#endif
+#include "elf/i386.h"
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,false,0,complain_overflow_bitfield, bfd_elf_generic_reloc,"R_386_PLT32", true,0xffffffff,0xffffffff,false),
- 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,false,0,complain_overflow_bitfield, bfd_elf_generic_reloc,"R_386_GOTPC", true,0xffffffff,0xffffffff,false),
+ 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),
+
+ /* 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. */
+ HOWTO (R_386_GNU_VTINHERIT, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 0, /* bitsize */
+ false, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont, /* complain_on_overflow */
+ NULL, /* special_function */
+ "R_386_GNU_VTINHERIT", /* name */
+ false, /* partial_inplace */
+ 0, /* src_mask */
+ 0, /* dst_mask */
+ false),
+
+/* GNU extension to record C++ vtable member usage. */
+ HOWTO (R_386_GNU_VTENTRY, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 0, /* bitsize */
+ false, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont, /* complain_on_overflow */
+ _bfd_elf_rel_vtable_reloc_fn, /* special_function */
+ "R_386_GNU_VTENTRY", /* name */
+ false, /* partial_inplace */
+ 0, /* src_mask */
+ 0, /* dst_mask */
+ false)
+
+#define R_386_vt ((unsigned int) R_386_GNU_VTENTRY + 1 - R_386_vt_offset)
+
};
#ifdef DEBUG_GEN_RELOC
#define TRACE(str)
#endif
-static CONST struct reloc_howto_struct *
-DEFUN (elf_i386_reloc_type_lookup, (abfd, code),
- bfd *abfd AND
- bfd_reloc_code_real_type code)
+static reloc_howto_type *
+elf_i386_reloc_type_lookup (abfd, code)
+ bfd *abfd ATTRIBUTE_UNUSED;
+ bfd_reloc_code_real_type code;
{
switch (code)
{
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[(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[(unsigned int) R_386_16 - R_386_ext_offset];
+
+ case BFD_RELOC_16_PCREL:
+ TRACE ("BFD_RELOC_16_PCREL");
+ 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[(unsigned int) R_386_8 - R_386_ext_offset];
+
+ case BFD_RELOC_8_PCREL:
+ TRACE ("BFD_RELOC_8_PCREL");
+ return &elf_howto_table[(unsigned int) R_386_PC8 - R_386_ext_offset];
+
+ case BFD_RELOC_VTABLE_INHERIT:
+ TRACE ("BFD_RELOC_VTABLE_INHERIT");
+ 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 &elf_howto_table[(unsigned int) R_386_GNU_VTENTRY
+ - R_386_vt_offset];
default:
break;
}
static void
-DEFUN(elf_i386_info_to_howto, (abfd, cache_ptr, dst),
- bfd *abfd AND
- arelent *cache_ptr AND
- Elf32_Internal_Rela *dst)
+elf_i386_info_to_howto (abfd, cache_ptr, dst)
+ bfd *abfd ATTRIBUTE_UNUSED;
+ arelent *cache_ptr ATTRIBUTE_UNUSED;
+ Elf32_Internal_Rela *dst ATTRIBUTE_UNUSED;
{
- BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_386_max);
-
- cache_ptr->howto = &elf_howto_table[ELF32_R_TYPE(dst->r_info)];
+ abort ();
}
static void
-DEFUN(elf_i386_info_to_howto_rel, (abfd, cache_ptr, dst),
- bfd *abfd AND
- arelent *cache_ptr AND
- Elf32_Internal_Rel *dst)
+elf_i386_info_to_howto_rel (abfd, cache_ptr, dst)
+ bfd *abfd ATTRIBUTE_UNUSED;
+ arelent *cache_ptr;
+ Elf32_Internal_Rel *dst;
+{
+ 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_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
+ 2.1 cc generates temporary symbols that start with .X, so we
+ recognize them here. FIXME: do other SVR4 compilers also use .X?.
+ If so, we should move the .X recognition into
+ _bfd_elf_is_local_label_name. */
+
+static boolean
+elf_i386_is_local_label_name (abfd, name)
+ bfd *abfd;
+ const char *name;
+{
+ if (name[0] == '.' && name[1] == 'X')
+ return true;
+
+ return _bfd_elf_is_local_label_name (abfd, name);
+}
+\f
+/* Functions for the i386 ELF linker. */
+
+/* The name of the dynamic interpreter. This is put in the .interp
+ section. */
+
+#define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
+
+/* The size in bytes of an entry in the procedure linkage table. */
+
+#define PLT_ENTRY_SIZE 16
+
+/* The first entry in an absolute procedure linkage table looks like
+ this. See the SVR4 ABI i386 supplement to see how this works. */
+
+static const bfd_byte elf_i386_plt0_entry[PLT_ENTRY_SIZE] =
+{
+ 0xff, 0x35, /* pushl contents of address */
+ 0, 0, 0, 0, /* replaced with address of .got + 4. */
+ 0xff, 0x25, /* jmp indirect */
+ 0, 0, 0, 0, /* replaced with address of .got + 8. */
+ 0, 0, 0, 0 /* pad out to 16 bytes. */
+};
+
+/* Subsequent entries in an absolute procedure linkage table look like
+ this. */
+
+static const bfd_byte elf_i386_plt_entry[PLT_ENTRY_SIZE] =
+{
+ 0xff, 0x25, /* jmp indirect */
+ 0, 0, 0, 0, /* replaced with address of this symbol in .got. */
+ 0x68, /* pushl immediate */
+ 0, 0, 0, 0, /* replaced with offset into relocation table. */
+ 0xe9, /* jmp relative */
+ 0, 0, 0, 0 /* replaced with offset to start of .plt. */
+};
+
+/* The first entry in a PIC procedure linkage table look like this. */
+
+static const bfd_byte elf_i386_pic_plt0_entry[PLT_ENTRY_SIZE] =
+{
+ 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
+ 0xff, 0xa3, 8, 0, 0, 0, /* jmp *8(%ebx) */
+ 0, 0, 0, 0 /* pad out to 16 bytes. */
+};
+
+/* Subsequent entries in a PIC procedure linkage table look like this. */
+
+static const bfd_byte elf_i386_pic_plt_entry[PLT_ENTRY_SIZE] =
+{
+ 0xff, 0xa3, /* jmp *offset(%ebx) */
+ 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
+ 0x68, /* pushl immediate */
+ 0, 0, 0, 0, /* replaced with offset into relocation table. */
+ 0xe9, /* jmp relative */
+ 0, 0, 0, 0 /* replaced with offset to start of .plt. */
+};
+
+/* The i386 linker needs to keep track of the number of relocs that it
+ 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. */
+
+struct elf_i386_dyn_relocs
+{
+ /* Next section. */
+ struct elf_i386_dyn_relocs *next;
+ /* A section in dynobj. */
+ asection *section;
+ /* Number of relocs copied in this section. */
+ bfd_size_type count;
+};
+
+/* i386 ELF linker hash entry. */
+
+struct elf_i386_link_hash_entry
+{
+ struct elf_link_hash_entry root;
+
+ /* Number of PC relative relocs copied for this symbol. */
+ struct elf_i386_dyn_relocs *dyn_relocs;
+};
+
+/* i386 ELF linker hash table. */
+
+struct elf_i386_link_hash_table
+{
+ struct elf_link_hash_table root;
+
+ /* 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. */
+
+#define elf_i386_hash_table(p) \
+ ((struct elf_i386_link_hash_table *) ((p)->hash))
+
+/* Create an entry in an i386 ELF linker hash table. */
+
+static struct bfd_hash_entry *
+elf_i386_link_hash_newfunc (entry, table, string)
+ struct bfd_hash_entry *entry;
+ struct bfd_hash_table *table;
+ const char *string;
+{
+ struct elf_i386_link_hash_entry *ret =
+ (struct elf_i386_link_hash_entry *) entry;
+
+ /* Allocate the structure if it has not already been allocated by a
+ subclass. */
+ if (ret == (struct elf_i386_link_hash_entry *) NULL)
+ ret = ((struct elf_i386_link_hash_entry *)
+ bfd_hash_allocate (table,
+ sizeof (struct elf_i386_link_hash_entry)));
+ if (ret == (struct elf_i386_link_hash_entry *) NULL)
+ return (struct bfd_hash_entry *) ret;
+
+ /* Call the allocation method of the superclass. */
+ ret = ((struct elf_i386_link_hash_entry *)
+ _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
+ table, string));
+ if (ret != (struct elf_i386_link_hash_entry *) NULL)
+ {
+ ret->dyn_relocs = NULL;
+ }
+
+ return (struct bfd_hash_entry *) ret;
+}
+
+/* Create an i386 ELF linker hash table. */
+
+static struct bfd_link_hash_table *
+elf_i386_link_hash_table_create (abfd)
+ bfd *abfd;
+{
+ struct elf_i386_link_hash_table *ret;
+
+ ret = ((struct elf_i386_link_hash_table *)
+ bfd_alloc (abfd, sizeof (struct elf_i386_link_hash_table)));
+ if (ret == (struct elf_i386_link_hash_table *) NULL)
+ return NULL;
+
+ if (! _bfd_elf_link_hash_table_init (&ret->root, abfd,
+ elf_i386_link_hash_newfunc))
+ {
+ bfd_release (abfd, 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. */
+
+static boolean
+elf_i386_check_relocs (abfd, info, sec, relocs)
+ bfd *abfd;
+ struct bfd_link_info *info;
+ 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_signed_vma *local_got_refcounts;
+ const Elf_Internal_Rela *rel;
+ const Elf_Internal_Rela *rel_end;
+ asection *sreloc;
+
+ if (info->relocateable)
+ return true;
+
+ 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_refcounts = elf_local_got_refcounts (abfd);
+
+ sreloc = NULL;
+
+ rel_end = relocs + sec->reloc_count;
+ for (rel = relocs; rel < rel_end; rel++)
+ {
+ unsigned long r_symndx;
+ struct elf_link_hash_entry *h;
+
+ 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 (htab->sgot == NULL)
+ {
+ switch (ELF32_R_TYPE (rel->r_info))
+ {
+ case R_386_GOT32:
+ case R_386_GOTOFF:
+ case R_386_GOTPC:
+ if (dynobj == NULL)
+ htab->root.dynobj = dynobj = abfd;
+ if (!create_got_section (dynobj, info))
+ return false;
+ break;
+
+ default:
+ break;
+ }
+ }
+
+ switch (ELF32_R_TYPE (rel->r_info))
+ {
+ case R_386_GOT32:
+ /* This symbol requires a global offset table entry. */
+ if (h != NULL)
+ {
+ 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_refcounts == NULL)
+ {
+ size_t size;
+
+ 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_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;
+ }
+ 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. */
+
+ /* If this is a local symbol, we resolve it directly without
+ creating a procedure linkage table entry. */
+ if (h == NULL)
+ continue;
+
+ 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 && !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). 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)))
+ {
+ /* 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;
+
+ name = (bfd_elf_string_from_elf_section
+ (abfd,
+ elf_elfheader (abfd)->e_shstrndx,
+ elf_section_data (sec)->rel_hdr.sh_name));
+ if (name == NULL)
+ return false;
+
+ 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)
+ {
+ flagword flags;
+
+ sreloc = bfd_make_section (dynobj, name);
+ flags = (SEC_HAS_CONTENTS | SEC_READONLY
+ | SEC_IN_MEMORY | SEC_LINKER_CREATED);
+ if ((sec->flags & SEC_ALLOC) != 0)
+ flags |= SEC_ALLOC | SEC_LOAD;
+ if (sreloc == NULL
+ || ! bfd_set_section_flags (dynobj, sreloc, flags)
+ || ! bfd_set_section_alignment (dynobj, sreloc, 2))
+ return false;
+ }
+ }
+
+ sreloc->_raw_size += sizeof (Elf32_External_Rel);
+
+ /* 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_dyn_relocs *p;
+
+ eh = (struct elf_i386_link_hash_entry *) h;
+
+ for (p = eh->dyn_relocs; p != NULL; p = p->next)
+ if (p->section == sreloc)
+ break;
+
+ if (p == NULL)
+ {
+ p = ((struct elf_i386_dyn_relocs *)
+ bfd_alloc (dynobj, sizeof *p));
+ if (p == NULL)
+ return false;
+ p->next = eh->dyn_relocs;
+ eh->dyn_relocs = p;
+ p->section = sreloc;
+ p->count = 0;
+ }
+
+ ++p->count;
+ }
+ }
+
+ break;
+
+ /* This relocation describes the C++ object vtable hierarchy.
+ Reconstruct it for later use during GC. */
+ case R_386_GNU_VTINHERIT:
+ if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
+ return false;
+ break;
+
+ /* This relocation describes which C++ vtable entries are actually
+ used. Record for later use during GC. */
+ case R_386_GNU_VTENTRY:
+ if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_offset))
+ return false;
+ break;
+
+ default:
+ break;
+ }
+ }
+
+ return true;
+}
+
+/* Return the section that should be marked against GC for a given
+ relocation. */
+
+static asection *
+elf_i386_gc_mark_hook (abfd, info, rel, h, sym)
+ bfd *abfd;
+ struct bfd_link_info *info ATTRIBUTE_UNUSED;
+ Elf_Internal_Rela *rel;
+ struct elf_link_hash_entry *h;
+ Elf_Internal_Sym *sym;
+{
+ if (h != NULL)
+ {
+ switch (ELF32_R_TYPE (rel->r_info))
+ {
+ case R_386_GNU_VTINHERIT:
+ case R_386_GNU_VTENTRY:
+ break;
+
+ default:
+ switch (h->root.type)
+ {
+ case bfd_link_hash_defined:
+ case bfd_link_hash_defweak:
+ return h->root.u.def.section;
+
+ case bfd_link_hash_common:
+ return h->root.u.c.p->section;
+
+ default:
+ break;
+ }
+ }
+ }
+ else
+ {
+ if (!(elf_bad_symtab (abfd)
+ && ELF_ST_BIND (sym->st_info) != STB_LOCAL)
+ && ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE)
+ && sym->st_shndx != SHN_COMMON))
+ {
+ return bfd_section_from_elf_index (abfd, sym->st_shndx);
+ }
+ }
+
+ return NULL;
+}
+
+/* Update the got entry reference counts for the section being removed. */
+
+static boolean
+elf_i386_gc_sweep_hook (abfd, info, sec, relocs)
+ bfd *abfd;
+ struct bfd_link_info *info;
+ asection *sec;
+ const Elf_Internal_Rela *relocs;
+{
+ 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;
+}
+
+/* Adjust a symbol defined by a dynamic object and referenced by a
+ regular object. The current definition is in some section of the
+ dynamic object, but we're not including those sections. We have to
+ change the definition to something the rest of the link can
+ understand. */
+
+static boolean
+elf_i386_adjust_dynamic_symbol (info, h)
+ 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;
+
+ 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,
+ when we know the address of the .got section. */
+ if (h->type == STT_FUNC
+ || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 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, 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;
+ }
+
+ 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
+ real definition first, and we can just use the same value. */
+ if (h->weakdef != NULL)
+ {
+ BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
+ || h->weakdef->root.type == bfd_link_hash_defweak);
+ h->root.u.def.section = h->weakdef->root.u.def.section;
+ h->root.u.def.value = h->weakdef->root.u.def.value;
+ return true;
+ }
+
+ /* This is a reference to a symbol defined by a dynamic object which
+ is not a function. */
+
+ /* If we are creating a shared library, we must presume that the
+ only references to the symbol are via the global offset table.
+ For such cases we need not do anything here; the relocations will
+ be handled correctly by relocate_section. */
+ if (info->shared)
+ return true;
+
+ /* If there are no references to this symbol that do not use the
+ GOT, we don't need to generate a copy reloc. */
+ if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
+ return true;
+
+ /* We must allocate the symbol in our .dynbss section, which will
+ become part of the .bss section of the executable. There will be
+ an entry for this symbol in the .dynsym section. The dynamic
+ object will contain position independent code, so all references
+ from the dynamic object to this symbol will go through the global
+ offset table. The dynamic linker will use the .dynsym entry to
+ determine the address it must put in the global offset table, so
+ both the dynamic object and the regular object will refer to the
+ same memory location for the variable. */
+
+ 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
+ runtime process image. We need to remember the offset into the
+ .rel.bss section we are going to use. */
+ if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
+ {
+ asection *srel;
+
+ srel = htab->srelbss;
+ if (srel == NULL)
+ abort ();
+ srel->_raw_size += sizeof (Elf32_External_Rel);
+ h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
+ }
+
+ /* We need to figure out the alignment required for this symbol. I
+ have no idea how ELF linkers handle this. */
+ power_of_two = bfd_log2 (h->size);
+ if (power_of_two > 3)
+ power_of_two = 3;
+
+ /* Apply the required alignment. */
+ s->_raw_size = BFD_ALIGN (s->_raw_size,
+ (bfd_size_type) (1 << power_of_two));
+ if (power_of_two > bfd_get_section_alignment (dynobj, s))
+ {
+ if (! bfd_set_section_alignment (dynobj, s, power_of_two))
+ return false;
+ }
+
+ /* Define the symbol as being at this point in the section. */
+ h->root.u.def.section = s;
+ h->root.u.def.value = s->_raw_size;
+
+ /* Increment the section size to make room for the symbol. */
+ s->_raw_size += h->size;
+
+ 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;
{
- BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_386_max);
+ 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;
- cache_ptr->howto = &elf_howto_table[ELF32_R_TYPE(dst->r_info)];
+ 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
+ || 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
+elf_i386_size_dynamic_sections (output_bfd, info)
+ bfd *output_bfd;
+ struct bfd_link_info *info;
+{
+ struct elf_i386_link_hash_table *htab;
+ bfd *dynobj;
+ asection *s;
+ boolean relocs;
+ boolean reltext;
+ bfd *i;
+
+ htab = elf_i386_hash_table (info);
+ dynobj = htab->root.dynobj;
+ if (dynobj == NULL)
+ abort ();
+
+ 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");
+ if (s == NULL)
+ abort ();
+ s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
+ s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
+ }
+ }
+
+ /* Set up .got offsets for local syms. */
+ for (i = info->input_bfds; i; i = i->link_next)
+ {
+ 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;
+ }
+ }
+
+ /* 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)
+ {
+ if ((s->flags & SEC_LINKER_CREATED) == 0)
+ continue;
+
+ if (s == htab->splt
+ || s == htab->sgot
+ || s == htab->sgotplt)
+ {
+ /* Strip this section if we don't need it; see the
+ comment below. */
+ }
+ else if (strncmp (bfd_get_section_name (dynobj, s), ".rel", 4) == 0)
+ {
+ if (s->_raw_size == 0)
+ {
+ /* If we don't need this section, strip it from the
+ output file. This is mostly to handle .rel.bss and
+ .rel.plt. We must create both sections in
+ create_dynamic_sections, because they must be created
+ before the linker maps input sections to output
+ sections. The linker does that before
+ adjust_dynamic_symbol is called, and it is that
+ function which decides whether anything needs to go
+ into these sections. */
+ }
+ else
+ {
+ asection *target;
+
+ /* Remember whether there are any reloc sections other
+ than .rel.plt. */
+ if (s != htab->srelplt)
+ {
+ const char *outname;
+
+ relocs = true;
+
+ /* If this relocation section applies to a read only
+ section, then we probably need a DT_TEXTREL
+ entry. The entries in the .rel.plt section
+ really apply to the .got section, which we
+ created ourselves and so know is not readonly. */
+ outname = bfd_get_section_name (output_bfd,
+ s->output_section);
+ target = bfd_get_section_by_name (output_bfd, outname + 4);
+ if (target != NULL
+ && (target->flags & SEC_READONLY) != 0
+ && (target->flags & SEC_ALLOC) != 0)
+ reltext = true;
+ }
+
+ /* We use the reloc_count field as a counter if we need
+ to copy relocs into the output file. */
+ s->reloc_count = 0;
+ }
+ }
+ else
+ {
+ /* It's not one of our sections, so don't allocate space. */
+ continue;
+ }
+
+ if (s->_raw_size == 0)
+ {
+ _bfd_strip_section_from_output (info, s);
+ continue;
+ }
+
+ /* 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 (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
+ 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 (htab->splt->_raw_size != 0)
+ {
+ 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 (reltext)
+ {
+ if (! bfd_elf32_add_dynamic_entry (info, DT_TEXTREL, 0))
+ return false;
+ info->flags |= DF_TEXTREL;
+ }
+ }
+
+ return true;
+}
+
+/* Relocate an i386 ELF section. */
+
+static boolean
+elf_i386_relocate_section (output_bfd, info, input_bfd, input_section,
+ contents, relocs, local_syms, local_sections)
+ bfd *output_bfd;
+ struct bfd_link_info *info;
+ bfd *input_bfd;
+ asection *input_section;
+ bfd_byte *contents;
+ Elf_Internal_Rela *relocs;
+ 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 *sreloc;
+ Elf_Internal_Rela *rel;
+ Elf_Internal_Rela *relend;
+
+ 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);
+
+ sreloc = NULL;
+ rel = relocs;
+ relend = relocs + input_section->reloc_count;
+ for (; rel < relend; rel++)
+ {
+ int r_type;
+ reloc_howto_type *howto;
+ unsigned long r_symndx;
+ 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 == (int) R_386_GNU_VTINHERIT
+ || r_type == (int) R_386_GNU_VTENTRY)
+ continue;
+
+ 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 + indx;
+
+ r_symndx = ELF32_R_SYM (rel->r_info);
+
+ if (info->relocateable)
+ {
+ /* This is a relocateable link. We don't have to change
+ anything, unless the reloc is against a section symbol,
+ in which case we have to adjust according to where the
+ section symbol winds up in the output section. */
+ if (r_symndx < symtab_hdr->sh_info)
+ {
+ sym = local_syms + r_symndx;
+ if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
+ {
+ bfd_vma val;
+
+ sec = local_sections[r_symndx];
+ val = bfd_get_32 (input_bfd, contents + rel->r_offset);
+ val += sec->output_offset + sym->st_value;
+ bfd_put_32 (input_bfd, val, contents + rel->r_offset);
+ }
+ }
+
+ continue;
+ }
+
+ /* This is a final link. */
+ h = NULL;
+ sym = NULL;
+ sec = NULL;
+ unresolved_reloc = false;
+ if (r_symndx < symtab_hdr->sh_info)
+ {
+ sym = local_syms + r_symndx;
+ sec = local_sections[r_symndx];
+ relocation = (sec->output_section->vma
+ + sec->output_offset
+ + sym->st_value);
+ }
+ else
+ {
+ h = sym_hashes[r_symndx - symtab_hdr->sh_info];
+ 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 (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)
+ ;
+ 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,
+ (!info->shared || info->no_undefined
+ || ELF_ST_VISIBILITY (h->other)))))
+ return false;
+ }
+ }
+
+ switch (r_type)
+ {
+ case R_386_GOT32:
+ /* Relocation is to the entry for this symbol in the global
+ offset table. */
+ if (htab->sgot == NULL)
+ abort ();
+
+ if (h != NULL)
+ {
+ boolean dyn;
+
+ off = h->got.offset;
+ dyn = htab->root.dynamic_sections_created;
+ if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h)
+ || (info->shared
+ && (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
+ -Bsymbolic link and the symbol is defined
+ locally, or the symbol was forced to be local
+ because of a version file. 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,
+ htab->sgot->contents + off);
+ h->got.offset |= 1;
+ }
+ }
+ else
+ unresolved_reloc = false;
+ }
+ else
+ {
+ 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. */
+ if ((off & 1) != 0)
+ off &= ~1;
+ else
+ {
+ bfd_put_32 (output_bfd, relocation,
+ htab->sgot->contents + off);
+
+ if (info->shared)
+ {
+ asection *srelgot;
+ Elf_Internal_Rel outrel;
+
+ srelgot = htab->srelgot;
+ if (srelgot == NULL)
+ abort ();
+
+ 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,
+ (((Elf32_External_Rel *)
+ srelgot->contents)
+ + srelgot->reloc_count));
+ ++srelgot->reloc_count;
+ }
+
+ local_got_offsets[r_symndx] |= 1;
+ }
+ }
+
+ 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. */
+
+ /* 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 -= htab->sgot->output_section->vma;
+ break;
+
+ case R_386_GOTPC:
+ /* Use global offset table as symbol value. */
+ 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 against a local symbol directly,
+ without using the procedure linkage table. */
+ if (h == NULL)
+ break;
+
+ 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. */
+ break;
+ }
+
+ 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))))
+ || (!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;
+
+ /* When generating a shared object, these relocations
+ are copied into the output file to be resolved at run
+ time. */
+
+ if (sreloc == NULL)
+ {
+ const char *name;
+
+ name = (bfd_elf_string_from_elf_section
+ (input_bfd,
+ elf_elfheader (input_bfd)->e_shstrndx,
+ elf_section_data (input_section)->rel_hdr.sh_name));
+ if (name == NULL)
+ return false;
+
+ 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);
+ if (sreloc == NULL)
+ abort ();
+ }
+
+ skip = false;
+
+ if (elf_section_data (input_section)->stab_info == NULL)
+ outrel.r_offset = rel->r_offset;
+ else
+ {
+ bfd_vma off;
+
+ off = (_bfd_stab_section_offset
+ (output_bfd, htab->root.stab_info, input_section,
+ &elf_section_data (input_section)->stab_info,
+ rel->r_offset));
+ if (off == (bfd_vma) -1)
+ skip = true;
+ outrel.r_offset = off;
+ }
+
+ outrel.r_offset += (input_section->output_section->vma
+ + input_section->output_offset);
+
+ if (skip)
+ {
+ memset (&outrel, 0, sizeof outrel);
+ relocate = false;
+ }
+ 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))
+
+ {
+ relocate = false;
+ outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
+ }
+ else
+ {
+ /* 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,
+ (((Elf32_External_Rel *)
+ sreloc->contents)
+ + sreloc->reloc_count));
+ ++sreloc->reloc_count;
+
+ /* If this reloc is against an external symbol, we do
+ not want to fiddle with the addend. Otherwise, we
+ need to include the symbol value so that it becomes
+ an addend for the dynamic reloc. */
+ if (! relocate)
+ continue;
+ }
+
+ break;
+
+ default:
+ 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);
+
+ switch (r)
+ {
+ case bfd_reloc_ok:
+ break;
+
+ case bfd_reloc_overflow:
+ {
+ 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)))
+ return false;
+ }
+ break;
+
+ default:
+ case bfd_reloc_outofrange:
+ abort ();
+ break;
+ }
+ }
+
+ return true;
+}
+
+/* Finish up dynamic symbol handling. We set the contents of various
+ dynamic sections here. */
+
+static boolean
+elf_i386_finish_dynamic_symbol (output_bfd, info, h, sym)
+ bfd *output_bfd;
+ struct bfd_link_info *info;
+ struct elf_link_hash_entry *h;
+ Elf_Internal_Sym *sym;
+{
+ struct elf_i386_link_hash_table *htab;
+ bfd *dynobj;
+
+ htab = elf_i386_hash_table (info);
+ dynobj = htab->root.dynobj;
+
+ if (h->plt.offset != (bfd_vma) -1)
+ {
+ 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. */
+
+ 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
+ in all the symbols for which we are making plt entries. The
+ first entry in the procedure linkage table is reserved. */
+ plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
+
+ /* Get the offset into the .got table of the entry that
+ corresponds to this function. Each .got entry is 4 bytes.
+ The first three are reserved. */
+ got_offset = (plt_index + 3) * 4;
+
+ /* Fill in the entry in the procedure linkage table. */
+ if (! info->shared)
+ {
+ memcpy (htab->splt->contents + h->plt.offset, elf_i386_plt_entry,
+ PLT_ENTRY_SIZE);
+ bfd_put_32 (output_bfd,
+ (htab->sgotplt->output_section->vma
+ + htab->sgotplt->output_offset
+ + got_offset),
+ htab->splt->contents + h->plt.offset + 2);
+ }
+ else
+ {
+ memcpy (htab->splt->contents + h->plt.offset, elf_i386_pic_plt_entry,
+ PLT_ENTRY_SIZE);
+ bfd_put_32 (output_bfd, got_offset,
+ htab->splt->contents + h->plt.offset + 2);
+ }
+
+ bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rel),
+ htab->splt->contents + h->plt.offset + 7);
+ bfd_put_32 (output_bfd, - (h->plt.offset + PLT_ENTRY_SIZE),
+ htab->splt->contents + h->plt.offset + 12);
+
+ /* Fill in the entry in the global offset table. */
+ bfd_put_32 (output_bfd,
+ (htab->splt->output_section->vma
+ + htab->splt->output_offset
+ + h->plt.offset
+ + 6),
+ htab->sgotplt->contents + got_offset);
+
+ /* Fill in the entry in the .rel.plt section. */
+ 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 *) htab->srelplt->contents
+ + plt_index));
+
+ if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
+ {
+ /* Mark the symbol as undefined, rather than as defined in
+ the .plt section. Leave the value alone. */
+ sym->st_shndx = SHN_UNDEF;
+ }
+ }
+
+ if (h->got.offset != (bfd_vma) -1)
+ {
+ Elf_Internal_Rel rel;
+
+ /* This symbol has an entry in the global offset table. Set it
+ up. */
+
+ if (htab->sgot == NULL || htab->srelgot == NULL)
+ abort ();
+
+ rel.r_offset = (htab->sgot->output_section->vma
+ + htab->sgot->output_offset
+ + (h->got.offset &~ 1));
+
+ /* 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
+ || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL))
+ && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
+ {
+ BFD_ASSERT((h->got.offset & 1) != 0);
+ rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
+ }
+ else
+ {
+ 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 *) htab->srelgot->contents
+ + htab->srelgot->reloc_count));
+ ++htab->srelgot->reloc_count;
+ }
+
+ if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
+ {
+ Elf_Internal_Rel rel;
+
+ /* This symbol needs a copy reloc. Set it up. */
+
+ 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 *) htab->srelbss->contents
+ + htab->srelbss->reloc_count));
+ ++htab->srelbss->reloc_count;
+ }
+
+ /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
+ if (strcmp (h->root.root.string, "_DYNAMIC") == 0
+ || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
+ sym->st_shndx = SHN_ABS;
+
+ return true;
+}
+
+/* Finish up the dynamic sections. */
+
+static boolean
+elf_i386_finish_dynamic_sections (output_bfd, info)
+ bfd *output_bfd;
+ struct bfd_link_info *info;
+{
+ struct elf_i386_link_hash_table *htab;
+ bfd *dynobj;
+ asection *sdyn;
+
+ htab = elf_i386_hash_table (info);
+ dynobj = htab->root.dynobj;
+ sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
+
+ if (htab->root.dynamic_sections_created)
+ {
+ Elf32_External_Dyn *dyncon, *dynconend;
+
+ 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;
+
+ bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
+
+ switch (dyn.d_tag)
+ {
+ default:
+ break;
+
+ case DT_PLTGOT:
+ dyn.d_un.d_ptr = htab->sgot->output_section->vma;
+ bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
+ break;
+
+ case DT_JMPREL:
+ dyn.d_un.d_ptr = htab->srelplt->output_section->vma;
+ bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
+ break;
+
+ case DT_PLTRELSZ:
+ 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 = htab->srelplt->output_section->_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. */
+ if (htab->srelplt != NULL)
+ {
+ 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 -= 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. */
+ if (htab->splt && htab->splt->_raw_size > 0)
+ {
+ if (info->shared)
+ memcpy (htab->splt->contents,
+ elf_i386_pic_plt0_entry, PLT_ENTRY_SIZE);
+ else
+ {
+ memcpy (htab->splt->contents,
+ elf_i386_plt0_entry, PLT_ENTRY_SIZE);
+ bfd_put_32 (output_bfd,
+ (htab->sgotplt->output_section->vma
+ + htab->sgotplt->output_offset
+ + 4),
+ htab->splt->contents + 2);
+ bfd_put_32 (output_bfd,
+ (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 (htab->splt->output_section)
+ ->this_hdr.sh_entsize = 4;
+ }
+ }
+
+ if (htab->sgotplt)
+ {
+ /* 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;
+}
+
+/* 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_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 ELF_MAXPAGESIZE 0x1000
+#define elf_backend_can_gc_sections 1
+#define elf_backend_want_got_plt 1
+#define elf_backend_plt_readonly 1
+#define elf_backend_want_plt_sym 0
+#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