/* X86-64 specific support for ELF
- Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
- 2010, 2011
- Free Software Foundation, Inc.
+ Copyright (C) 2000-2014 Free Software Foundation, Inc.
Contributed by Jan Hubicka <jh@suse.cz>.
This file is part of BFD, the Binary File Descriptor library.
#include "bfdlink.h"
#include "libbfd.h"
#include "elf-bfd.h"
+#include "elf-nacl.h"
#include "bfd_stdint.h"
#include "objalloc.h"
#include "hashtab.h"
#include "dwarf2.h"
+#include "libiberty.h"
#include "elf/x86-64.h"
HOWTO(R_X86_64_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_signed,
bfd_elf_generic_reloc, "R_X86_64_PLTOFF64", FALSE, MINUS_ONE,
MINUS_ONE, FALSE),
- EMPTY_HOWTO (32),
- EMPTY_HOWTO (33),
+ HOWTO(R_X86_64_SIZE32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned,
+ bfd_elf_generic_reloc, "R_X86_64_SIZE32", FALSE, 0xffffffff, 0xffffffff,
+ FALSE),
+ HOWTO(R_X86_64_SIZE64, 0, 4, 64, FALSE, 0, complain_overflow_unsigned,
+ bfd_elf_generic_reloc, "R_X86_64_SIZE64", FALSE, MINUS_ONE, MINUS_ONE,
+ FALSE),
HOWTO(R_X86_64_GOTPC32_TLSDESC, 0, 2, 32, TRUE, 0,
complain_overflow_bitfield, bfd_elf_generic_reloc,
"R_X86_64_GOTPC32_TLSDESC",
HOWTO(R_X86_64_IRELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
bfd_elf_generic_reloc, "R_X86_64_IRELATIVE", FALSE, MINUS_ONE,
MINUS_ONE, FALSE),
+ HOWTO(R_X86_64_RELATIVE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
+ bfd_elf_generic_reloc, "R_X86_64_RELATIVE64", FALSE, MINUS_ONE,
+ MINUS_ONE, FALSE),
+ HOWTO(R_X86_64_PC32_BND, 0, 2, 32, TRUE, 0, complain_overflow_signed,
+ bfd_elf_generic_reloc, "R_X86_64_PC32_BND", FALSE, 0xffffffff, 0xffffffff,
+ TRUE),
+ HOWTO(R_X86_64_PLT32_BND, 0, 2, 32, TRUE, 0, complain_overflow_signed,
+ bfd_elf_generic_reloc, "R_X86_64_PLT32_BND", FALSE, 0xffffffff, 0xffffffff,
+ TRUE),
/* We have a gap in the reloc numbers here.
R_X86_64_standard counts the number up to this point, and
R_X86_64_vt_offset is the value to subtract from a reloc type of
R_X86_64_GNU_VT* to form an index into this table. */
-#define R_X86_64_standard (R_X86_64_IRELATIVE + 1)
+#define R_X86_64_standard (R_X86_64_PLT32_BND + 1)
#define R_X86_64_vt_offset (R_X86_64_GNU_VTINHERIT - R_X86_64_standard)
/* GNU extension to record C++ vtable hierarchy. */
/* GNU extension to record C++ vtable member usage. */
HOWTO (R_X86_64_GNU_VTENTRY, 0, 4, 0, FALSE, 0, complain_overflow_dont,
_bfd_elf_rel_vtable_reloc_fn, "R_X86_64_GNU_VTENTRY", FALSE, 0, 0,
- FALSE)
+ FALSE),
+
+/* Use complain_overflow_bitfield on R_X86_64_32 for x32. */
+ HOWTO(R_X86_64_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
+ bfd_elf_generic_reloc, "R_X86_64_32", FALSE, 0xffffffff, 0xffffffff,
+ FALSE)
};
#define IS_X86_64_PCREL_TYPE(TYPE) \
( ((TYPE) == R_X86_64_PC8) \
|| ((TYPE) == R_X86_64_PC16) \
|| ((TYPE) == R_X86_64_PC32) \
+ || ((TYPE) == R_X86_64_PC32_BND) \
|| ((TYPE) == R_X86_64_PC64))
/* Map BFD relocs to the x86_64 elf relocs. */
{ BFD_RELOC_X86_64_GOTPC64, R_X86_64_GOTPC64, },
{ BFD_RELOC_X86_64_GOTPLT64, R_X86_64_GOTPLT64, },
{ BFD_RELOC_X86_64_PLTOFF64, R_X86_64_PLTOFF64, },
+ { BFD_RELOC_SIZE32, R_X86_64_SIZE32, },
+ { BFD_RELOC_SIZE64, R_X86_64_SIZE64, },
{ BFD_RELOC_X86_64_GOTPC32_TLSDESC, R_X86_64_GOTPC32_TLSDESC, },
{ BFD_RELOC_X86_64_TLSDESC_CALL, R_X86_64_TLSDESC_CALL, },
{ BFD_RELOC_X86_64_TLSDESC, R_X86_64_TLSDESC, },
{ BFD_RELOC_X86_64_IRELATIVE, R_X86_64_IRELATIVE, },
+ { BFD_RELOC_X86_64_PC32_BND, R_X86_64_PC32_BND,},
+ { BFD_RELOC_X86_64_PLT32_BND, R_X86_64_PLT32_BND,},
{ BFD_RELOC_VTABLE_INHERIT, R_X86_64_GNU_VTINHERIT, },
{ BFD_RELOC_VTABLE_ENTRY, R_X86_64_GNU_VTENTRY, },
};
{
unsigned i;
- if (r_type < (unsigned int) R_X86_64_GNU_VTINHERIT
- || r_type >= (unsigned int) R_X86_64_max)
+ if (r_type == (unsigned int) R_X86_64_32)
+ {
+ if (ABI_64_P (abfd))
+ i = r_type;
+ else
+ i = ARRAY_SIZE (x86_64_elf_howto_table) - 1;
+ }
+ else if (r_type < (unsigned int) R_X86_64_GNU_VTINHERIT
+ || r_type >= (unsigned int) R_X86_64_max)
{
if (r_type >= (unsigned int) R_X86_64_standard)
{
}
static reloc_howto_type *
-elf_x86_64_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
+elf_x86_64_reloc_name_lookup (bfd *abfd,
const char *r_name)
{
unsigned int i;
- for (i = 0;
- i < (sizeof (x86_64_elf_howto_table)
- / sizeof (x86_64_elf_howto_table[0]));
- i++)
+ if (!ABI_64_P (abfd) && strcasecmp (r_name, "R_X86_64_32") == 0)
+ {
+ /* Get x32 R_X86_64_32. */
+ reloc_howto_type *reloc
+ = &x86_64_elf_howto_table[ARRAY_SIZE (x86_64_elf_howto_table) - 1];
+ BFD_ASSERT (reloc->type == (unsigned int) R_X86_64_32);
+ return reloc;
+ }
+
+ for (i = 0; i < ARRAY_SIZE (x86_64_elf_howto_table); i++)
if (x86_64_elf_howto_table[i].name != NULL
&& strcasecmp (x86_64_elf_howto_table[i].name, r_name) == 0)
return &x86_64_elf_howto_table[i];
case 296: /* sizeof(istruct elf_prstatus) on Linux/x32 */
/* pr_cursig */
- elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
+ elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
/* pr_pid */
- elf_tdata (abfd)->core_lwpid = bfd_get_32 (abfd, note->descdata + 24);
+ elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
/* pr_reg */
offset = 72;
case 336: /* sizeof(istruct elf_prstatus) on Linux/x86_64 */
/* pr_cursig */
- elf_tdata (abfd)->core_signal
+ elf_tdata (abfd)->core->signal
= bfd_get_16 (abfd, note->descdata + 12);
/* pr_pid */
- elf_tdata (abfd)->core_lwpid
+ elf_tdata (abfd)->core->lwpid
= bfd_get_32 (abfd, note->descdata + 32);
/* pr_reg */
return FALSE;
case 124: /* sizeof(struct elf_prpsinfo) on Linux/x32 */
- elf_tdata (abfd)->core_pid
+ elf_tdata (abfd)->core->pid
= bfd_get_32 (abfd, note->descdata + 12);
- elf_tdata (abfd)->core_program
+ elf_tdata (abfd)->core->program
= _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
- elf_tdata (abfd)->core_command
+ elf_tdata (abfd)->core->command
= _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
break;
case 136: /* sizeof(struct elf_prpsinfo) on Linux/x86_64 */
- elf_tdata (abfd)->core_pid
+ elf_tdata (abfd)->core->pid
= bfd_get_32 (abfd, note->descdata + 24);
- elf_tdata (abfd)->core_program
+ elf_tdata (abfd)->core->program
= _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
- elf_tdata (abfd)->core_command
+ elf_tdata (abfd)->core->command
= _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
}
implementations, so strip it off if it exists. */
{
- char *command = elf_tdata (abfd)->core_command;
+ char *command = elf_tdata (abfd)->core->command;
int n = strlen (command);
if (0 < n && command[n - 1] == ' ')
int note_type, ...)
{
const struct elf_backend_data *bed = get_elf_backend_data (abfd);
- const void *p;
- int size;
va_list ap;
const char *fname, *psargs;
long pid;
memset (&data, 0, sizeof (data));
strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
- p = (const void *) &data;
- size = sizeof (data);
+ return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
+ &data, sizeof (data));
}
else
{
- prpsinfo_t data;
+ prpsinfo64_t data;
memset (&data, 0, sizeof (data));
strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
- p = (const void *) &data;
- size = sizeof (data);
+ return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
+ &data, sizeof (data));
}
- break;
+ /* NOTREACHED */
case NT_PRSTATUS:
va_start (ap, note_type);
prstat.pr_pid = pid;
prstat.pr_cursig = cursig;
memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
- p = (const void *) &prstat;
- size = sizeof (prstat);
+ return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
+ &prstat, sizeof (prstat));
}
else
{
prstat.pr_pid = pid;
prstat.pr_cursig = cursig;
memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
- p = (const void *) &prstat;
- size = sizeof (prstat);
+ return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
+ &prstat, sizeof (prstat));
}
}
else
{
- prstatus_t prstat;
+ prstatus64_t prstat;
memset (&prstat, 0, sizeof (prstat));
prstat.pr_pid = pid;
prstat.pr_cursig = cursig;
memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
- p = (const void *) &prstat;
- size = sizeof (prstat);
+ return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
+ &prstat, sizeof (prstat));
}
- break;
}
-
- return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type, p,
- size);
+ /* NOTREACHED */
}
#endif
\f
section. */
#define ELF64_DYNAMIC_INTERPRETER "/lib/ld64.so.1"
-#define ELF32_DYNAMIC_INTERPRETER "/lib/ld32.so.1"
+#define ELF32_DYNAMIC_INTERPRETER "/lib/ldx32.so.1"
/* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
copying dynamic variables from a shared lib into an app's dynbss
0, 0, 0, 0 /* replaced with offset to start of .plt0. */
};
+/* The first entry in a procedure linkage table with BND relocations
+ like this. */
+
+static const bfd_byte elf_x86_64_bnd_plt0_entry[PLT_ENTRY_SIZE] =
+{
+ 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
+ 0xf2, 0xff, 0x25, 16, 0, 0, 0, /* bnd jmpq *GOT+16(%rip) */
+ 0x0f, 0x1f, 0 /* nopl (%rax) */
+};
+
+/* Subsequent entries for legacy branches in a procedure linkage table
+ with BND relocations look like this. */
+
+static const bfd_byte elf_x86_64_legacy_plt_entry[PLT_ENTRY_SIZE] =
+{
+ 0x68, 0, 0, 0, 0, /* pushq immediate */
+ 0xe9, 0, 0, 0, 0, /* jmpq relative */
+ 0x66, 0x0f, 0x1f, 0x44, 0, 0 /* nopw (%rax,%rax,1) */
+};
+
+/* Subsequent entries for branches with BND prefx in a procedure linkage
+ table with BND relocations look like this. */
+
+static const bfd_byte elf_x86_64_bnd_plt_entry[PLT_ENTRY_SIZE] =
+{
+ 0x68, 0, 0, 0, 0, /* pushq immediate */
+ 0xf2, 0xe9, 0, 0, 0, 0, /* bnd jmpq relative */
+ 0x0f, 0x1f, 0x44, 0, 0 /* nopl 0(%rax,%rax,1) */
+};
+
+/* Entries for legacy branches in the second procedure linkage table
+ look like this. */
+
+static const bfd_byte elf_x86_64_legacy_plt2_entry[8] =
+{
+ 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */
+ 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
+ 0x66, 0x90 /* xchg %ax,%ax */
+};
+
+/* Entries for branches with BND prefix in the second procedure linkage
+ table look like this. */
+
+static const bfd_byte elf_x86_64_bnd_plt2_entry[8] =
+{
+ 0xf2, 0xff, 0x25, /* bnd jmpq *name@GOTPC(%rip) */
+ 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
+ 0x90 /* nop */
+};
+
/* .eh_frame covering the .plt section. */
static const bfd_byte elf_x86_64_eh_frame_plt[] =
DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
};
+/* Architecture-specific backend data for x86-64. */
+
+struct elf_x86_64_backend_data
+{
+ /* Templates for the initial PLT entry and for subsequent entries. */
+ const bfd_byte *plt0_entry;
+ const bfd_byte *plt_entry;
+ unsigned int plt_entry_size; /* Size of each PLT entry. */
+
+ /* Offsets into plt0_entry that are to be replaced with GOT[1] and GOT[2]. */
+ unsigned int plt0_got1_offset;
+ unsigned int plt0_got2_offset;
+
+ /* Offset of the end of the PC-relative instruction containing
+ plt0_got2_offset. */
+ unsigned int plt0_got2_insn_end;
+
+ /* Offsets into plt_entry that are to be replaced with... */
+ unsigned int plt_got_offset; /* ... address of this symbol in .got. */
+ unsigned int plt_reloc_offset; /* ... offset into relocation table. */
+ unsigned int plt_plt_offset; /* ... offset to start of .plt. */
+
+ /* Length of the PC-relative instruction containing plt_got_offset. */
+ unsigned int plt_got_insn_size;
+
+ /* Offset of the end of the PC-relative jump to plt0_entry. */
+ unsigned int plt_plt_insn_end;
+
+ /* Offset into plt_entry where the initial value of the GOT entry points. */
+ unsigned int plt_lazy_offset;
+
+ /* .eh_frame covering the .plt section. */
+ const bfd_byte *eh_frame_plt;
+ unsigned int eh_frame_plt_size;
+};
+
+#define get_elf_x86_64_arch_data(bed) \
+ ((const struct elf_x86_64_backend_data *) (bed)->arch_data)
+
+#define get_elf_x86_64_backend_data(abfd) \
+ get_elf_x86_64_arch_data (get_elf_backend_data (abfd))
+
+#define GET_PLT_ENTRY_SIZE(abfd) \
+ get_elf_x86_64_backend_data (abfd)->plt_entry_size
+
+/* These are the standard parameters. */
+static const struct elf_x86_64_backend_data elf_x86_64_arch_bed =
+ {
+ elf_x86_64_plt0_entry, /* plt0_entry */
+ elf_x86_64_plt_entry, /* plt_entry */
+ sizeof (elf_x86_64_plt_entry), /* plt_entry_size */
+ 2, /* plt0_got1_offset */
+ 8, /* plt0_got2_offset */
+ 12, /* plt0_got2_insn_end */
+ 2, /* plt_got_offset */
+ 7, /* plt_reloc_offset */
+ 12, /* plt_plt_offset */
+ 6, /* plt_got_insn_size */
+ PLT_ENTRY_SIZE, /* plt_plt_insn_end */
+ 6, /* plt_lazy_offset */
+ elf_x86_64_eh_frame_plt, /* eh_frame_plt */
+ sizeof (elf_x86_64_eh_frame_plt), /* eh_frame_plt_size */
+ };
+
+static const struct elf_x86_64_backend_data elf_x86_64_bnd_arch_bed =
+ {
+ elf_x86_64_bnd_plt0_entry, /* plt0_entry */
+ elf_x86_64_bnd_plt_entry, /* plt_entry */
+ sizeof (elf_x86_64_bnd_plt_entry), /* plt_entry_size */
+ 2, /* plt0_got1_offset */
+ 1+8, /* plt0_got2_offset */
+ 1+12, /* plt0_got2_insn_end */
+ 1+2, /* plt_got_offset */
+ 1, /* plt_reloc_offset */
+ 7, /* plt_plt_offset */
+ 1+6, /* plt_got_insn_size */
+ 11, /* plt_plt_insn_end */
+ 0, /* plt_lazy_offset */
+ elf_x86_64_eh_frame_plt, /* eh_frame_plt */
+ sizeof (elf_x86_64_eh_frame_plt), /* eh_frame_plt_size */
+ };
+
+#define elf_backend_arch_data &elf_x86_64_arch_bed
+
/* x86-64 ELF linker hash entry. */
struct elf_x86_64_link_hash_entry
(GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
unsigned char tls_type;
+ /* TRUE if symbol has at least one BND relocation. */
+ bfd_boolean has_bnd_reloc;
+
+ /* Information about the second PLT entry. Filled when has_bnd_reloc is
+ set. */
+ union gotplt_union plt_bnd;
+
/* Offset of the GOTPLT entry reserved for the TLS descriptor,
starting at the end of the jump table. */
bfd_vma tlsdesc_got;
asection *sdynbss;
asection *srelbss;
asection *plt_eh_frame;
+ asection *plt_bnd;
union
{
/* The offset into sgot of the GOT entry used by the PLT entry
above. */
bfd_vma tlsdesc_got;
+
+ /* The index of the next R_X86_64_JUMP_SLOT entry in .rela.plt. */
+ bfd_vma next_jump_slot_index;
+ /* The index of the next R_X86_64_IRELATIVE entry in .rela.plt. */
+ bfd_vma next_irelative_index;
};
/* Get the x86-64 ELF linker hash table from a link_info structure. */
if (entry == NULL)
{
entry = (struct bfd_hash_entry *)
- bfd_hash_allocate (table,
- sizeof (struct elf_x86_64_link_hash_entry));
+ bfd_hash_allocate (table,
+ sizeof (struct elf_x86_64_link_hash_entry));
if (entry == NULL)
return entry;
}
eh = (struct elf_x86_64_link_hash_entry *) entry;
eh->dyn_relocs = NULL;
eh->tls_type = GOT_UNKNOWN;
+ eh->has_bnd_reloc = FALSE;
+ eh->plt_bnd.offset = (bfd_vma) -1;
eh->tlsdesc_got = (bfd_vma) -1;
}
return &ret->elf;
}
+/* Destroy an X86-64 ELF linker hash table. */
+
+static void
+elf_x86_64_link_hash_table_free (bfd *obfd)
+{
+ struct elf_x86_64_link_hash_table *htab
+ = (struct elf_x86_64_link_hash_table *) obfd->link.hash;
+
+ if (htab->loc_hash_table)
+ htab_delete (htab->loc_hash_table);
+ if (htab->loc_hash_memory)
+ objalloc_free ((struct objalloc *) htab->loc_hash_memory);
+ _bfd_elf_link_hash_table_free (obfd);
+}
+
/* Create an X86-64 ELF linker hash table. */
static struct bfd_link_hash_table *
struct elf_x86_64_link_hash_table *ret;
bfd_size_type amt = sizeof (struct elf_x86_64_link_hash_table);
- ret = (struct elf_x86_64_link_hash_table *) bfd_malloc (amt);
+ ret = (struct elf_x86_64_link_hash_table *) bfd_zmalloc (amt);
if (ret == NULL)
return NULL;
return NULL;
}
- ret->sdynbss = NULL;
- ret->srelbss = NULL;
- ret->plt_eh_frame = NULL;
- ret->sym_cache.abfd = NULL;
- ret->tlsdesc_plt = 0;
- ret->tlsdesc_got = 0;
- ret->tls_ld_got.refcount = 0;
- ret->sgotplt_jump_table_size = 0;
- ret->tls_module_base = NULL;
-
if (ABI_64_P (abfd))
{
ret->r_info = elf64_r_info;
ret->loc_hash_memory = objalloc_create ();
if (!ret->loc_hash_table || !ret->loc_hash_memory)
{
- free (ret);
+ elf_x86_64_link_hash_table_free (abfd);
return NULL;
}
+ ret->elf.root.hash_table_free = elf_x86_64_link_hash_table_free;
return &ret->elf.root;
}
-/* Destroy an X86-64 ELF linker hash table. */
-
-static void
-elf_x86_64_link_hash_table_free (struct bfd_link_hash_table *hash)
-{
- struct elf_x86_64_link_hash_table *htab
- = (struct elf_x86_64_link_hash_table *) hash;
-
- if (htab->loc_hash_table)
- htab_delete (htab->loc_hash_table);
- if (htab->loc_hash_memory)
- objalloc_free ((struct objalloc *) htab->loc_hash_memory);
- _bfd_generic_link_hash_table_free (hash);
-}
-
/* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
.rela.bss sections in DYNOBJ, and set up shortcuts to them in our
hash table. */
if (htab == NULL)
return FALSE;
- htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
+ htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
if (!info->shared)
- htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss");
+ htab->srelbss = bfd_get_linker_section (dynobj, ".rela.bss");
if (!htab->sdynbss
|| (!info->shared && !htab->srelbss))
abort ();
if (!info->no_ld_generated_unwind_info
- && bfd_get_section_by_name (dynobj, ".eh_frame") == NULL
+ && htab->plt_eh_frame == NULL
&& htab->elf.splt != NULL)
{
- flagword flags = get_elf_backend_data (dynobj)->dynamic_sec_flags;
+ flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
+ | SEC_HAS_CONTENTS | SEC_IN_MEMORY
+ | SEC_LINKER_CREATED);
htab->plt_eh_frame
- = bfd_make_section_with_flags (dynobj, ".eh_frame",
- flags | SEC_READONLY);
+ = bfd_make_section_anyway_with_flags (dynobj, ".eh_frame", flags);
if (htab->plt_eh_frame == NULL
|| !bfd_set_section_alignment (dynobj, htab->plt_eh_frame, 3))
return FALSE;
-
- htab->plt_eh_frame->size = sizeof (elf_x86_64_eh_frame_plt);
- htab->plt_eh_frame->contents
- = bfd_alloc (dynobj, htab->plt_eh_frame->size);
- memcpy (htab->plt_eh_frame->contents, elf_x86_64_eh_frame_plt,
- sizeof (elf_x86_64_eh_frame_plt));
}
return TRUE;
}
edir = (struct elf_x86_64_link_hash_entry *) dir;
eind = (struct elf_x86_64_link_hash_entry *) ind;
+ if (!edir->has_bnd_reloc)
+ edir->has_bnd_reloc = eind->has_bnd_reloc;
+
if (eind->dyn_relocs != NULL)
{
if (edir->dyn_relocs != NULL)
return TRUE;
}
-typedef union
- {
- unsigned char c[2];
- uint16_t i;
- }
-x86_64_opcode16;
-
-typedef union
- {
- unsigned char c[4];
- uint32_t i;
- }
-x86_64_opcode32;
+static bfd_boolean
+elf32_x86_64_elf_object_p (bfd *abfd)
+{
+ /* Set the right machine number for an x86-64 elf32 file. */
+ bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32);
+ return TRUE;
+}
/* Return TRUE if the TLS access code sequence support transition
from R_TYPE. */
{
unsigned int val;
unsigned long r_symndx;
+ bfd_boolean largepic = FALSE;
struct elf_link_hash_entry *h;
bfd_vma offset;
struct elf_x86_64_link_hash_table *htab;
can transit to different access model. For 32bit, only
leaq foo@tlsgd(%rip), %rdi
.word 0x6666; rex64; call __tls_get_addr
- can transit to different access model. */
+ can transit to different access model. For largepic
+ we also support:
+ leaq foo@tlsgd(%rip), %rdi
+ movabsq $__tls_get_addr@pltoff, %rax
+ addq $rbx, %rax
+ call *%rax. */
+
+ static const unsigned char call[] = { 0x66, 0x66, 0x48, 0xe8 };
+ static const unsigned char leaq[] = { 0x66, 0x48, 0x8d, 0x3d };
- static x86_64_opcode32 call = { { 0x66, 0x66, 0x48, 0xe8 } };
- if ((offset + 12) > sec->size
- || bfd_get_32 (abfd, contents + offset + 4) != call.i)
+ if ((offset + 12) > sec->size)
return FALSE;
- if (ABI_64_P (abfd))
+ if (memcmp (contents + offset + 4, call, 4) != 0)
+ {
+ if (!ABI_64_P (abfd)
+ || (offset + 19) > sec->size
+ || offset < 3
+ || memcmp (contents + offset - 3, leaq + 1, 3) != 0
+ || memcmp (contents + offset + 4, "\x48\xb8", 2) != 0
+ || memcmp (contents + offset + 14, "\x48\x01\xd8\xff\xd0", 5)
+ != 0)
+ return FALSE;
+ largepic = TRUE;
+ }
+ else if (ABI_64_P (abfd))
{
- static x86_64_opcode32 leaq = { { 0x66, 0x48, 0x8d, 0x3d } };
if (offset < 4
- || bfd_get_32 (abfd, contents + offset - 4) != leaq.i)
+ || memcmp (contents + offset - 4, leaq, 4) != 0)
return FALSE;
}
else
{
- static x86_64_opcode16 lea = { { 0x8d, 0x3d } };
if (offset < 3
- || bfd_get_8 (abfd, contents + offset - 3) != 0x48
- || bfd_get_16 (abfd, contents + offset - 2) != lea.i)
+ || memcmp (contents + offset - 3, leaq + 1, 3) != 0)
return FALSE;
}
}
/* Check transition from LD access model. Only
leaq foo@tlsld(%rip), %rdi;
call __tls_get_addr
- can transit to different access model. */
+ can transit to different access model. For largepic
+ we also support:
+ leaq foo@tlsld(%rip), %rdi
+ movabsq $__tls_get_addr@pltoff, %rax
+ addq $rbx, %rax
+ call *%rax. */
- static x86_64_opcode32 ld = { { 0x48, 0x8d, 0x3d, 0xe8 } };
- x86_64_opcode32 op;
+ static const unsigned char lea[] = { 0x48, 0x8d, 0x3d };
if (offset < 3 || (offset + 9) > sec->size)
return FALSE;
- op.i = bfd_get_32 (abfd, contents + offset - 3);
- op.c[3] = bfd_get_8 (abfd, contents + offset + 4);
- if (op.i != ld.i)
+ if (memcmp (contents + offset - 3, lea, 3) != 0)
return FALSE;
+
+ if (0xe8 != *(contents + offset + 4))
+ {
+ if (!ABI_64_P (abfd)
+ || (offset + 19) > sec->size
+ || memcmp (contents + offset + 4, "\x48\xb8", 2) != 0
+ || memcmp (contents + offset + 14, "\x48\x01\xd8\xff\xd0", 5)
+ != 0)
+ return FALSE;
+ largepic = TRUE;
+ }
}
r_symndx = htab->r_sym (rel[1].r_info);
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
/* Use strncmp to check __tls_get_addr since __tls_get_addr
- may be versioned. */
+ may be versioned. */
return (h != NULL
&& h->root.root.string != NULL
- && (ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PC32
- || ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLT32)
+ && (largepic
+ ? ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLTOFF64
+ : (ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PC32
+ || ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLT32))
&& (strncmp (h->root.root.string,
"__tls_get_addr", 14) == 0));
if (offset + 2 <= sec->size)
{
/* Make sure that it's a call *x@tlsdesc(%rax). */
- static x86_64_opcode16 call = { { 0xff, 0x10 } };
- return bfd_get_16 (abfd, contents + offset) == call.i;
+ static const unsigned char call[] = { 0xff, 0x10 };
+ return memcmp (contents + offset, call, 2) == 0;
}
return FALSE;
struct elf_link_hash_entry *h;
Elf_Internal_Sym *isym;
const char *name;
+ bfd_boolean size_reloc;
r_symndx = htab->r_sym (rel->r_info);
r_type = ELF32_R_TYPE (rel->r_info);
default:
break;
- case R_X86_64_64:
- /* Allow R_X86_64_64 relocations in SEC_DEBUGGING sections
- when building shared libraries. */
- if (info->shared
- && !info->executable
- && (sec->flags & SEC_DEBUGGING) != 0)
- break;
-
case R_X86_64_DTPOFF64:
case R_X86_64_TPOFF64:
case R_X86_64_PC64:
default:
break;
- case R_X86_64_32S:
+ case R_X86_64_PC32_BND:
+ case R_X86_64_PLT32_BND:
+ case R_X86_64_PC32:
+ case R_X86_64_PLT32:
case R_X86_64_32:
case R_X86_64_64:
- case R_X86_64_PC32:
+ /* MPX PLT is supported only if elf_x86_64_arch_bed
+ is used in 64-bit mode. */
+ if (ABI_64_P (abfd)
+ && info->bndplt
+ && (get_elf_x86_64_backend_data (abfd)
+ == &elf_x86_64_arch_bed))
+ {
+ elf_x86_64_hash_entry (h)->has_bnd_reloc = TRUE;
+
+ /* Create the second PLT for Intel MPX support. */
+ if (htab->plt_bnd == NULL)
+ {
+ unsigned int plt_bnd_align;
+ const struct elf_backend_data *bed;
+
+ bed = get_elf_backend_data (info->output_bfd);
+ switch (sizeof (elf_x86_64_bnd_plt2_entry))
+ {
+ case 8:
+ plt_bnd_align = 3;
+ break;
+ case 16:
+ plt_bnd_align = 4;
+ break;
+ default:
+ abort ();
+ }
+
+ if (htab->elf.dynobj == NULL)
+ htab->elf.dynobj = abfd;
+ htab->plt_bnd
+ = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
+ ".plt.bnd",
+ (bed->dynamic_sec_flags
+ | SEC_ALLOC
+ | SEC_CODE
+ | SEC_LOAD
+ | SEC_READONLY));
+ if (htab->plt_bnd == NULL
+ || !bfd_set_section_alignment (htab->elf.dynobj,
+ htab->plt_bnd,
+ plt_bnd_align))
+ return FALSE;
+ }
+ }
+
+ case R_X86_64_32S:
case R_X86_64_PC64:
- case R_X86_64_PLT32:
case R_X86_64_GOTPCREL:
case R_X86_64_GOTPCREL64:
if (htab->elf.dynobj == NULL)
break;
}
- /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
- it here if it is defined in a non-shared object. */
- if (h->type == STT_GNU_IFUNC
- && h->def_regular)
- {
- /* It is referenced by a non-shared object. */
- h->ref_regular = 1;
- h->needs_plt = 1;
-
- /* STT_GNU_IFUNC symbol must go through PLT. */
- h->plt.refcount += 1;
-
- /* STT_GNU_IFUNC needs dynamic sections. */
- if (htab->elf.dynobj == NULL)
- htab->elf.dynobj = abfd;
-
- switch (r_type)
- {
- default:
- if (h->root.root.string)
- name = h->root.root.string;
- else
- name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
- NULL);
- (*_bfd_error_handler)
- (_("%B: relocation %s against STT_GNU_IFUNC "
- "symbol `%s' isn't handled by %s"), abfd,
- x86_64_elf_howto_table[r_type].name,
- name, __FUNCTION__);
- bfd_set_error (bfd_error_bad_value);
- return FALSE;
-
- case R_X86_64_32:
- if (ABI_64_P (abfd))
- goto not_pointer;
- case R_X86_64_64:
- h->non_got_ref = 1;
- h->pointer_equality_needed = 1;
- if (info->shared)
- {
- /* We must copy these reloc types into the output
- file. Create a reloc section in dynobj and
- make room for this reloc. */
- sreloc = _bfd_elf_create_ifunc_dyn_reloc
- (abfd, info, sec, sreloc,
- &((struct elf_x86_64_link_hash_entry *) h)->dyn_relocs);
- if (sreloc == NULL)
- return FALSE;
- }
- break;
-
- case R_X86_64_32S:
- case R_X86_64_PC32:
- case R_X86_64_PC64:
-not_pointer:
- h->non_got_ref = 1;
- if (r_type != R_X86_64_PC32
- && r_type != R_X86_64_PC64)
- h->pointer_equality_needed = 1;
- break;
-
- case R_X86_64_PLT32:
- break;
-
- case R_X86_64_GOTPCREL:
- case R_X86_64_GOTPCREL64:
- h->got.refcount += 1;
- if (htab->elf.sgot == NULL
- && !_bfd_elf_create_got_section (htab->elf.dynobj,
- info))
- return FALSE;
- break;
- }
-
- continue;
- }
+ /* It is referenced by a non-shared object. */
+ h->ref_regular = 1;
+ h->root.non_ir_ref = 1;
}
if (! elf_x86_64_tls_transition (info, abfd, sec, NULL,
(*_bfd_error_handler)
(_("%B: '%s' accessed both as normal and thread local symbol"),
abfd, name);
+ bfd_set_error (bfd_error_bad_value);
return FALSE;
}
}
break;
case R_X86_64_PLT32:
+ case R_X86_64_PLT32_BND:
/* 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
}
goto create_got;
+ case R_X86_64_SIZE32:
+ case R_X86_64_SIZE64:
+ size_reloc = TRUE;
+ goto do_size;
+
case R_X86_64_32:
if (!ABI_64_P (abfd))
goto pointer;
case R_X86_64_PC8:
case R_X86_64_PC16:
case R_X86_64_PC32:
+ case R_X86_64_PC32_BND:
case R_X86_64_PC64:
case R_X86_64_64:
pointer:
/* We may need a .plt entry if the function this reloc
refers to is in a shared lib. */
h->plt.refcount += 1;
- if (r_type != R_X86_64_PC32 && r_type != R_X86_64_PC64)
+ if (r_type != R_X86_64_PC32
+ && r_type != R_X86_64_PC32_BND
+ && r_type != R_X86_64_PC64)
h->pointer_equality_needed = 1;
}
+ size_reloc = FALSE;
+do_size:
/* 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
}
p->count += 1;
- if (IS_X86_64_PCREL_TYPE (r_type))
+ /* Count size relocation as PC-relative relocation. */
+ if (IS_X86_64_PCREL_TYPE (r_type) || size_reloc)
p->pc_count += 1;
}
break;
if (h != NULL)
{
if (r_type == R_X86_64_GOTPLT64 && h->plt.refcount > 0)
- h->plt.refcount -= 1;
+ h->plt.refcount -= 1;
if (h->got.refcount > 0)
h->got.refcount -= 1;
if (h->type == STT_GNU_IFUNC)
case R_X86_64_PC8:
case R_X86_64_PC16:
case R_X86_64_PC32:
+ case R_X86_64_PC32_BND:
case R_X86_64_PC64:
+ case R_X86_64_SIZE32:
+ case R_X86_64_SIZE64:
if (info->shared
&& (h == NULL || h->type != STT_GNU_IFUNC))
break;
/* Fall thru */
case R_X86_64_PLT32:
+ case R_X86_64_PLT32_BND:
case R_X86_64_PLTOFF64:
if (h != NULL)
{
{
struct elf_x86_64_link_hash_table *htab;
asection *s;
+ struct elf_x86_64_link_hash_entry *eh;
+ struct elf_dyn_relocs *p;
/* STT_GNU_IFUNC symbol must go through PLT. */
if (h->type == STT_GNU_IFUNC)
{
+ /* All local STT_GNU_IFUNC references must be treate as local
+ calls via local PLT. */
+ if (h->ref_regular
+ && SYMBOL_CALLS_LOCAL (info, h))
+ {
+ bfd_size_type pc_count = 0, count = 0;
+ struct elf_dyn_relocs **pp;
+
+ eh = (struct elf_x86_64_link_hash_entry *) h;
+ for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
+ {
+ pc_count += p->pc_count;
+ p->count -= p->pc_count;
+ p->pc_count = 0;
+ count += p->count;
+ if (p->count == 0)
+ *pp = p->next;
+ else
+ pp = &p->next;
+ }
+
+ if (pc_count || count)
+ {
+ h->needs_plt = 1;
+ h->non_got_ref = 1;
+ if (h->plt.refcount <= 0)
+ h->plt.refcount = 1;
+ else
+ h->plt.refcount += 1;
+ }
+ }
+
if (h->plt.refcount <= 0)
{
h->plt.offset = (bfd_vma) -1;
if (ELIMINATE_COPY_RELOCS)
{
- struct elf_x86_64_link_hash_entry * eh;
- struct elf_dyn_relocs *p;
-
eh = (struct elf_x86_64_link_hash_entry *) h;
for (p = eh->dyn_relocs; p != NULL; p = p->next)
{
}
}
- if (h->size == 0)
- {
- (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
- h->root.root.string);
- 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
/* We must generate a R_X86_64_COPY reloc to tell the dynamic linker
to copy the initial value out of the dynamic object and into the
runtime process image. */
- if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
+ if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
{
const struct elf_backend_data *bed;
bed = get_elf_backend_data (info->output_bfd);
struct elf_x86_64_link_hash_entry *eh;
struct elf_dyn_relocs *p;
const struct elf_backend_data *bed;
+ unsigned int plt_entry_size;
if (h->root.type == bfd_link_hash_indirect)
return TRUE;
if (htab == NULL)
return FALSE;
bed = get_elf_backend_data (info->output_bfd);
+ plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd);
/* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
here if it is defined and referenced in a non-shared object. */
if (h->type == STT_GNU_IFUNC
&& h->def_regular)
- return _bfd_elf_allocate_ifunc_dyn_relocs (info, h,
- &eh->dyn_relocs,
- PLT_ENTRY_SIZE,
- GOT_ENTRY_SIZE);
+ {
+ if (_bfd_elf_allocate_ifunc_dyn_relocs (info, h,
+ &eh->dyn_relocs,
+ plt_entry_size,
+ plt_entry_size,
+ GOT_ENTRY_SIZE))
+ {
+ asection *s = htab->plt_bnd;
+ if (h->plt.offset != (bfd_vma) -1 && s != NULL)
+ {
+ /* Use the .plt.bnd section if it is created. */
+ eh->plt_bnd.offset = s->size;
+
+ /* Make room for this entry in the .plt.bnd section. */
+ s->size += sizeof (elf_x86_64_legacy_plt2_entry);
+ }
+
+ return TRUE;
+ }
+ else
+ return FALSE;
+ }
else if (htab->elf.dynamic_sections_created
&& h->plt.refcount > 0)
{
|| WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
{
asection *s = htab->elf.splt;
+ asection *bnd_s = htab->plt_bnd;
/* If this is the first .plt entry, make room for the special
first entry. */
if (s->size == 0)
- s->size += PLT_ENTRY_SIZE;
+ s->size = plt_entry_size;
h->plt.offset = s->size;
+ if (bnd_s)
+ eh->plt_bnd.offset = bnd_s->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
if (! info->shared
&& !h->def_regular)
{
- h->root.u.def.section = s;
- h->root.u.def.value = h->plt.offset;
+ if (bnd_s)
+ {
+ /* We need to make a call to the entry of the second
+ PLT instead of regular PLT entry. */
+ h->root.u.def.section = bnd_s;
+ h->root.u.def.value = eh->plt_bnd.offset;
+ }
+ else
+ {
+ h->root.u.def.section = s;
+ h->root.u.def.value = h->plt.offset;
+ }
}
/* Make room for this entry. */
- s->size += PLT_ENTRY_SIZE;
+ s->size += plt_entry_size;
+ if (bnd_s)
+ {
+ BFD_ASSERT (sizeof (elf_x86_64_bnd_plt2_entry)
+ == sizeof (elf_x86_64_legacy_plt2_entry));
+ bnd_s->size += sizeof (elf_x86_64_legacy_plt2_entry);
+ }
/* We also need to make an entry in the .got.plt section, which
will be placed in the .got section by the linker script. */
return TRUE;
}
+/* Convert
+ mov foo@GOTPCREL(%rip), %reg
+ to
+ lea foo(%rip), %reg
+ with the local symbol, foo. */
+
+static bfd_boolean
+elf_x86_64_convert_mov_to_lea (bfd *abfd, asection *sec,
+ struct bfd_link_info *link_info)
+{
+ Elf_Internal_Shdr *symtab_hdr;
+ Elf_Internal_Rela *internal_relocs;
+ Elf_Internal_Rela *irel, *irelend;
+ bfd_byte *contents;
+ struct elf_x86_64_link_hash_table *htab;
+ bfd_boolean changed_contents;
+ bfd_boolean changed_relocs;
+ bfd_signed_vma *local_got_refcounts;
+
+ /* Don't even try to convert non-ELF outputs. */
+ if (!is_elf_hash_table (link_info->hash))
+ return FALSE;
+
+ /* Nothing to do if there are no codes, no relocations or no output. */
+ if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC)
+ || sec->reloc_count == 0
+ || bfd_is_abs_section (sec->output_section))
+ return TRUE;
+
+ symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
+
+ /* Load the relocations for this section. */
+ internal_relocs = (_bfd_elf_link_read_relocs
+ (abfd, sec, NULL, (Elf_Internal_Rela *) NULL,
+ link_info->keep_memory));
+ if (internal_relocs == NULL)
+ return FALSE;
+
+ htab = elf_x86_64_hash_table (link_info);
+ changed_contents = FALSE;
+ changed_relocs = FALSE;
+ local_got_refcounts = elf_local_got_refcounts (abfd);
+
+ /* Get the section contents. */
+ if (elf_section_data (sec)->this_hdr.contents != NULL)
+ contents = elf_section_data (sec)->this_hdr.contents;
+ else
+ {
+ if (!bfd_malloc_and_get_section (abfd, sec, &contents))
+ goto error_return;
+ }
+
+ irelend = internal_relocs + sec->reloc_count;
+ for (irel = internal_relocs; irel < irelend; irel++)
+ {
+ unsigned int r_type = ELF32_R_TYPE (irel->r_info);
+ unsigned int r_symndx = htab->r_sym (irel->r_info);
+ unsigned int indx;
+ struct elf_link_hash_entry *h;
+
+ if (r_type != R_X86_64_GOTPCREL)
+ continue;
+
+ /* Get the symbol referred to by the reloc. */
+ if (r_symndx < symtab_hdr->sh_info)
+ {
+ Elf_Internal_Sym *isym;
+
+ isym = bfd_sym_from_r_symndx (&htab->sym_cache,
+ abfd, r_symndx);
+
+ /* STT_GNU_IFUNC must keep R_X86_64_GOTPCREL relocation. */
+ if (ELF_ST_TYPE (isym->st_info) != STT_GNU_IFUNC
+ && bfd_get_8 (input_bfd,
+ contents + irel->r_offset - 2) == 0x8b)
+ {
+ bfd_put_8 (output_bfd, 0x8d,
+ contents + irel->r_offset - 2);
+ irel->r_info = htab->r_info (r_symndx, R_X86_64_PC32);
+ if (local_got_refcounts != NULL
+ && local_got_refcounts[r_symndx] > 0)
+ local_got_refcounts[r_symndx] -= 1;
+ changed_contents = TRUE;
+ changed_relocs = TRUE;
+ }
+ continue;
+ }
+
+ indx = r_symndx - symtab_hdr->sh_info;
+ h = elf_sym_hashes (abfd)[indx];
+ BFD_ASSERT (h != NULL);
+
+ 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;
+
+ /* STT_GNU_IFUNC must keep R_X86_64_GOTPCREL relocation. We also
+ avoid optimizing _DYNAMIC since ld.so may use its link-time
+ address. */
+ if (h->def_regular
+ && h->type != STT_GNU_IFUNC
+ && h != htab->elf.hdynamic
+ && SYMBOL_REFERENCES_LOCAL (link_info, h)
+ && bfd_get_8 (input_bfd,
+ contents + irel->r_offset - 2) == 0x8b)
+ {
+ bfd_put_8 (output_bfd, 0x8d,
+ contents + irel->r_offset - 2);
+ irel->r_info = htab->r_info (r_symndx, R_X86_64_PC32);
+ if (h->got.refcount > 0)
+ h->got.refcount -= 1;
+ changed_contents = TRUE;
+ changed_relocs = TRUE;
+ }
+ }
+
+ if (contents != NULL
+ && elf_section_data (sec)->this_hdr.contents != contents)
+ {
+ if (!changed_contents && !link_info->keep_memory)
+ free (contents);
+ else
+ {
+ /* Cache the section contents for elf_link_input_bfd. */
+ elf_section_data (sec)->this_hdr.contents = contents;
+ }
+ }
+
+ if (elf_section_data (sec)->relocs != internal_relocs)
+ {
+ if (!changed_relocs)
+ free (internal_relocs);
+ else
+ elf_section_data (sec)->relocs = internal_relocs;
+ }
+
+ return TRUE;
+
+ error_return:
+ if (contents != NULL
+ && elf_section_data (sec)->this_hdr.contents != contents)
+ free (contents);
+ if (internal_relocs != NULL
+ && elf_section_data (sec)->relocs != internal_relocs)
+ free (internal_relocs);
+ return FALSE;
+}
+
/* Set the sizes of the dynamic sections. */
static bfd_boolean
/* Set the contents of the .interp section to the interpreter. */
if (info->executable)
{
- s = bfd_get_section_by_name (dynobj, ".interp");
+ s = bfd_get_linker_section (dynobj, ".interp");
if (s == NULL)
abort ();
s->size = htab->dynamic_interpreter_size;
/* Set up .got offsets for local syms, and space for local dynamic
relocs. */
- for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
+ for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
{
bfd_signed_vma *local_got;
bfd_signed_vma *end_local_got;
{
struct elf_dyn_relocs *p;
+ if (!elf_x86_64_convert_mov_to_lea (ibfd, s, info))
+ return FALSE;
+
for (p = (struct elf_dyn_relocs *)
(elf_section_data (s)->local_dynrel);
p != NULL;
incremented. However, when we reserve space for TLS descriptors,
it's not incremented, so in order to compute the space reserved
for them, it suffices to multiply the reloc count by the jump
- slot size. */
+ slot size.
+
+ PR ld/13302: We start next_irelative_index at the end of .rela.plt
+ so that R_X86_64_IRELATIVE entries come last. */
if (htab->elf.srelplt)
- htab->sgotplt_jump_table_size
- = elf_x86_64_compute_jump_table_size (htab);
+ {
+ htab->sgotplt_jump_table_size
+ = elf_x86_64_compute_jump_table_size (htab);
+ htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1;
+ }
+ else if (htab->elf.irelplt)
+ htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1;
if (htab->tlsdesc_plt)
{
/* Reserve room for the initial entry.
FIXME: we could probably do away with it in this case. */
if (htab->elf.splt->size == 0)
- htab->elf.splt->size += PLT_ENTRY_SIZE;
+ htab->elf.splt->size += GET_PLT_ENTRY_SIZE (output_bfd);
htab->tlsdesc_plt = htab->elf.splt->size;
- htab->elf.splt->size += PLT_ENTRY_SIZE;
+ htab->elf.splt->size += GET_PLT_ENTRY_SIZE (output_bfd);
}
}
if (htab->elf.sgotplt)
{
- struct elf_link_hash_entry *got;
- got = elf_link_hash_lookup (elf_hash_table (info),
- "_GLOBAL_OFFSET_TABLE_",
- FALSE, FALSE, FALSE);
-
/* Don't allocate .got.plt section if there are no GOT nor PLT
- entries and there is no refeence to _GLOBAL_OFFSET_TABLE_. */
- if ((got == NULL
- || !got->ref_regular_nonweak)
+ entries and there is no refeence to _GLOBAL_OFFSET_TABLE_. */
+ if ((htab->elf.hgot == NULL
+ || !htab->elf.hgot->ref_regular_nonweak)
&& (htab->elf.sgotplt->size
== get_elf_backend_data (output_bfd)->got_header_size)
&& (htab->elf.splt == NULL
htab->elf.sgotplt->size = 0;
}
+ if (htab->plt_eh_frame != NULL
+ && htab->elf.splt != NULL
+ && htab->elf.splt->size != 0
+ && !bfd_is_abs_section (htab->elf.splt->output_section)
+ && _bfd_elf_eh_frame_present (info))
+ {
+ const struct elf_x86_64_backend_data *arch_data
+ = get_elf_x86_64_arch_data (bed);
+ htab->plt_eh_frame->size = arch_data->eh_frame_plt_size;
+ }
+
/* We now have determined the sizes of the various dynamic sections.
Allocate memory for them. */
relocs = FALSE;
|| s == htab->elf.sgotplt
|| s == htab->elf.iplt
|| s == htab->elf.igotplt
+ || s == htab->plt_bnd
+ || s == htab->plt_eh_frame
|| s == htab->sdynbss)
{
/* Strip this section if we don't need it; see the
}
if (htab->plt_eh_frame != NULL
- && htab->elf.splt != NULL
- && htab->elf.splt->size != 0
- && (htab->elf.splt->flags & SEC_EXCLUDE) == 0)
- bfd_put_32 (dynobj, htab->elf.splt->size,
- htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET);
+ && htab->plt_eh_frame->contents != NULL)
+ {
+ const struct elf_x86_64_backend_data *arch_data
+ = get_elf_x86_64_arch_data (bed);
+
+ memcpy (htab->plt_eh_frame->contents,
+ arch_data->eh_frame_plt, htab->plt_eh_frame->size);
+ bfd_put_32 (dynobj, htab->elf.splt->size,
+ htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET);
+ }
if (htab->elf.dynamic_sections_created)
{
/* If any dynamic relocs apply to a read-only section,
then we need a DT_TEXTREL entry. */
if ((info->flags & DF_TEXTREL) == 0)
- elf_link_hash_traverse (&htab->elf,
+ elf_link_hash_traverse (&htab->elf,
elf_x86_64_readonly_dynrelocs,
info);
bfd_vma *local_tlsdesc_gotents;
Elf_Internal_Rela *rel;
Elf_Internal_Rela *relend;
+ const unsigned int plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd);
BFD_ASSERT (is_x86_64_elf (input_bfd));
reloc_howto_type *howto;
unsigned long r_symndx;
struct elf_link_hash_entry *h;
+ struct elf_x86_64_link_hash_entry *eh;
Elf_Internal_Sym *sym;
asection *sec;
- bfd_vma off, offplt;
+ bfd_vma off, offplt, plt_offset;
bfd_vma relocation;
bfd_boolean unresolved_reloc;
bfd_reloc_status_type r;
int tls_type;
- asection *base_got;
+ asection *base_got, *resolved_plt;
+ bfd_vma st_size;
r_type = ELF32_R_TYPE (rel->r_info);
if (r_type == (int) R_X86_64_GNU_VTINHERIT
|| r_type == (int) R_X86_64_GNU_VTENTRY)
continue;
- if (r_type >= R_X86_64_max)
+ if (r_type >= (int) R_X86_64_standard)
{
+ (*_bfd_error_handler)
+ (_("%B: unrecognized relocation (0x%x) in section `%A'"),
+ input_bfd, input_section, r_type);
bfd_set_error (bfd_error_bad_value);
return FALSE;
}
- howto = x86_64_elf_howto_table + r_type;
+ if (r_type != (int) R_X86_64_32
+ || ABI_64_P (output_bfd))
+ howto = x86_64_elf_howto_table + r_type;
+ else
+ howto = (x86_64_elf_howto_table
+ + ARRAY_SIZE (x86_64_elf_howto_table) - 1);
r_symndx = htab->r_sym (rel->r_info);
h = NULL;
sym = NULL;
relocation = _bfd_elf_rela_local_sym (output_bfd, sym,
&sec, rel);
+ st_size = sym->st_size;
/* Relocate against local STT_GNU_IFUNC symbol. */
if (!info->relocatable
if (h == NULL)
abort ();
- /* Set STT_GNU_IFUNC symbol value. */
+ /* Set STT_GNU_IFUNC symbol value. */
h->root.u.def.value = sym->st_value;
h->root.u.def.section = sec;
}
else
{
bfd_boolean warned ATTRIBUTE_UNUSED;
+ bfd_boolean ignored ATTRIBUTE_UNUSED;
RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
r_symndx, symtab_hdr, sym_hashes,
h, sec, relocation,
- unresolved_reloc, warned);
+ unresolved_reloc, warned, ignored);
+ st_size = h->size;
}
- if (sec != NULL && elf_discarded_section (sec))
+ if (sec != NULL && discarded_section (sec))
RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
- rel, relend, howto, contents);
+ rel, 1, relend, howto, 0, contents);
if (info->relocatable)
continue;
+ if (rel->r_addend == 0 && !ABI_64_P (output_bfd))
+ {
+ if (r_type == R_X86_64_64)
+ {
+ /* For x32, treat R_X86_64_64 like R_X86_64_32 and
+ zero-extend it to 64bit if addend is zero. */
+ r_type = R_X86_64_32;
+ memset (contents + rel->r_offset + 4, 0, 4);
+ }
+ else if (r_type == R_X86_64_SIZE64)
+ {
+ /* For x32, treat R_X86_64_SIZE64 like R_X86_64_SIZE32 and
+ zero-extend it to 64bit if addend is zero. */
+ r_type = R_X86_64_SIZE32;
+ memset (contents + rel->r_offset + 4, 0, 4);
+ }
+ }
+
+ eh = (struct elf_x86_64_link_hash_entry *) h;
+
/* Since STT_GNU_IFUNC symbol must go through PLT, we handle
it here if it is defined in a non-shared object. */
if (h != NULL
&& h->type == STT_GNU_IFUNC
&& h->def_regular)
{
- asection *plt;
bfd_vma plt_index;
const char *name;
abort ();
/* STT_GNU_IFUNC symbol must go through PLT. */
- plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
- relocation = (plt->output_section->vma
- + plt->output_offset + h->plt.offset);
+ if (htab->elf.splt != NULL)
+ {
+ if (htab->plt_bnd != NULL)
+ {
+ resolved_plt = htab->plt_bnd;
+ plt_offset = eh->plt_bnd.offset;
+ }
+ else
+ {
+ resolved_plt = htab->elf.splt;
+ plt_offset = h->plt.offset;
+ }
+ }
+ else
+ {
+ resolved_plt = htab->elf.iplt;
+ plt_offset = h->plt.offset;
+ }
+
+ relocation = (resolved_plt->output_section->vma
+ + resolved_plt->output_offset + plt_offset);
switch (r_type)
{
if (ABI_64_P (output_bfd))
goto do_relocation;
/* FALLTHROUGH */
- case R_X86_64_64:
+ case R_X86_64_64:
if (rel->r_addend != 0)
{
if (h->root.root.string)
}
/* Generate dynamic relcoation only when there is a
- non-GOF reference in a shared object. */
+ non-GOT reference in a shared object. */
if (info->shared && h->non_got_ref)
{
Elf_Internal_Rela outrel;
}
/* FALLTHROUGH */
case R_X86_64_PC32:
+ case R_X86_64_PC32_BND:
case R_X86_64_PC64:
case R_X86_64_PLT32:
+ case R_X86_64_PLT32_BND:
goto do_relocation;
case R_X86_64_GOTPCREL:
if (htab->elf.splt != NULL)
{
- plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
+ plt_index = h->plt.offset / plt_entry_size - 1;
off = (plt_index + 3) * GOT_ENTRY_SIZE;
base_got = htab->elf.sgotplt;
}
else
{
- plt_index = h->plt.offset / PLT_ENTRY_SIZE;
+ plt_index = h->plt.offset / plt_entry_size;
off = plt_index * GOT_ENTRY_SIZE;
base_got = htab->elf.igotplt;
}
|| h->forced_local
|| info->symbolic)
{
- /* This references the local defitionion. We must
+ /* This references the local defitionion. We must
initialize this entry in the global offset table.
- Since the offset must always be a multiple of 8,
+ Since the offset must always be a multiple of 8,
we use the least significant bit to record
whether we have initialized it already.
off = h->got.offset;
if (h->needs_plt
- && h->plt.offset != (bfd_vma)-1
+ && h->plt.offset != (bfd_vma)-1
&& off == (bfd_vma)-1)
{
/* We can't use h->got.offset here to save
state, or even just remember the offset, as
finish_dynamic_symbol would use that as offset into
.got. */
- bfd_vma plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
+ bfd_vma plt_index = h->plt.offset / plt_entry_size - 1;
off = (plt_index + 3) * GOT_ENTRY_SIZE;
base_got = htab->elf.sgotplt;
}
bfd_put_64 (output_bfd, relocation,
base_got->contents + off);
/* Note that this is harmless for the GOTPLT64 case,
- as -1 | 1 still is -1. */
+ as -1 | 1 still is -1. */
h->got.offset |= 1;
}
}
/* Check to make sure it isn't a protected function symbol
for shared library since it may not be local when used
as function address. */
- if (info->shared
+ if (!info->executable
&& h
+ && !SYMBOLIC_BIND (info, h)
&& h->def_regular
&& h->type == STT_FUNC
&& ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
case R_X86_64_PLTOFF64:
/* Relocation is PLT entry relative to GOT. For local
symbols it's the symbol itself relative to GOT. */
- if (h != NULL
+ if (h != NULL
/* See PLT32 handling. */
&& h->plt.offset != (bfd_vma) -1
&& htab->elf.splt != NULL)
{
- relocation = (htab->elf.splt->output_section->vma
- + htab->elf.splt->output_offset
- + h->plt.offset);
+ if (htab->plt_bnd != NULL)
+ {
+ resolved_plt = htab->plt_bnd;
+ plt_offset = eh->plt_bnd.offset;
+ }
+ else
+ {
+ resolved_plt = htab->elf.splt;
+ plt_offset = h->plt.offset;
+ }
+
+ relocation = (resolved_plt->output_section->vma
+ + resolved_plt->output_offset
+ + plt_offset);
unresolved_reloc = FALSE;
}
break;
case R_X86_64_PLT32:
+ case R_X86_64_PLT32_BND:
/* Relocation is to the entry for this symbol in the
procedure linkage table. */
break;
}
- relocation = (htab->elf.splt->output_section->vma
- + htab->elf.splt->output_offset
- + h->plt.offset);
+ if (htab->plt_bnd != NULL)
+ {
+ resolved_plt = htab->plt_bnd;
+ plt_offset = eh->plt_bnd.offset;
+ }
+ else
+ {
+ resolved_plt = htab->elf.splt;
+ plt_offset = h->plt.offset;
+ }
+
+ relocation = (resolved_plt->output_section->vma
+ + resolved_plt->output_offset
+ + plt_offset);
unresolved_reloc = FALSE;
break;
+ case R_X86_64_SIZE32:
+ case R_X86_64_SIZE64:
+ /* Set to symbol size. */
+ relocation = st_size;
+ goto direct;
+
case R_X86_64_PC8:
case R_X86_64_PC16:
case R_X86_64_PC32:
+ case R_X86_64_PC32_BND:
if (info->shared
- && ABI_64_P (output_bfd)
&& (input_section->flags & SEC_ALLOC) != 0
&& (input_section->flags & SEC_READONLY) != 0
&& h != NULL)
{
bfd_boolean fail = FALSE;
bfd_boolean branch
- = (r_type == R_X86_64_PC32
+ = ((r_type == R_X86_64_PC32
+ || r_type == R_X86_64_PC32_BND)
&& is_32bit_relative_branch (contents, rel->r_offset));
if (SYMBOL_REFERENCES_LOCAL (info, h))
/* FIXME: The ABI says the linker should make sure the value is
the same when it's zeroextended to 64 bit. */
+direct:
if ((input_section->flags & SEC_ALLOC) == 0)
break;
&& (h == NULL
|| ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
|| h->root.type != bfd_link_hash_undefweak)
- && (! IS_X86_64_PCREL_TYPE (r_type)
+ && ((! IS_X86_64_PCREL_TYPE (r_type)
+ && r_type != R_X86_64_SIZE32
+ && r_type != R_X86_64_SIZE64)
|| ! SYMBOL_CALLS_LOCAL (info, h)))
|| (ELIMINATE_COPY_RELOCS
&& !info->shared
outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE);
outrel.r_addend = relocation + rel->r_addend;
}
+ else if (r_type == R_X86_64_64
+ && !ABI_64_P (output_bfd))
+ {
+ relocate = TRUE;
+ outrel.r_info = htab->r_info (0,
+ R_X86_64_RELATIVE64);
+ outrel.r_addend = relocation + rel->r_addend;
+ /* Check addend overflow. */
+ if ((outrel.r_addend & 0x80000000)
+ != (rel->r_addend & 0x80000000))
+ {
+ const char *name;
+ int addend = rel->r_addend;
+ if (h && h->root.root.string)
+ name = h->root.root.string;
+ else
+ name = bfd_elf_sym_name (input_bfd, symtab_hdr,
+ sym, NULL);
+ if (addend < 0)
+ (*_bfd_error_handler)
+ (_("%B: addend -0x%x in relocation %s against "
+ "symbol `%s' at 0x%lx in section `%A' is "
+ "out of range"),
+ input_bfd, input_section, addend,
+ x86_64_elf_howto_table[r_type].name,
+ name, (unsigned long) rel->r_offset);
+ else
+ (*_bfd_error_handler)
+ (_("%B: addend 0x%x in relocation %s against "
+ "symbol `%s' at 0x%lx in section `%A' is "
+ "out of range"),
+ input_bfd, input_section, addend,
+ x86_64_elf_howto_table[r_type].name,
+ name, (unsigned long) rel->r_offset);
+ bfd_set_error (bfd_error_bad_value);
+ return FALSE;
+ }
+ }
else
{
long sindx;
.word 0x6666; rex64; call __tls_get_addr
into:
movl %fs:0, %eax
- leaq foo@tpoff(%rax), %rax */
- if (ABI_64_P (output_bfd))
+ leaq foo@tpoff(%rax), %rax
+ For largepic, change:
+ leaq foo@tlsgd(%rip), %rdi
+ movabsq $__tls_get_addr@pltoff, %rax
+ addq %rbx, %rax
+ call *%rax
+ into:
+ movq %fs:0, %rax
+ leaq foo@tpoff(%rax), %rax
+ nopw 0x0(%rax,%rax,1) */
+ int largepic = 0;
+ if (ABI_64_P (output_bfd)
+ && contents[roff + 5] == (bfd_byte) '\xb8')
+ {
+ memcpy (contents + roff - 3,
+ "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80"
+ "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
+ largepic = 1;
+ }
+ else if (ABI_64_P (output_bfd))
memcpy (contents + roff - 4,
"\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
16);
15);
bfd_put_32 (output_bfd,
elf_x86_64_tpoff (info, relocation),
- contents + roff + 8);
- /* Skip R_X86_64_PC32/R_X86_64_PLT32. */
+ contents + roff + 8 + largepic);
+ /* Skip R_X86_64_PC32/R_X86_64_PLT32/R_X86_64_PLTOFF64. */
rel++;
continue;
}
else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTTPOFF)
{
/* IE->LE transition:
- Originally it can be one of:
+ For 64bit, originally it can be one of:
movq foo@gottpoff(%rip), %reg
addq foo@gottpoff(%rip), %reg
We change it into:
movq $foo, %reg
leaq foo(%reg), %reg
- addq $foo, %reg. */
+ addq $foo, %reg.
+ For 32bit, originally it can be one of:
+ movq foo@gottpoff(%rip), %reg
+ addl foo@gottpoff(%rip), %reg
+ We change it into:
+ movq $foo, %reg
+ leal foo(%reg), %reg
+ addl $foo, %reg. */
unsigned int val, type, reg;
- val = bfd_get_8 (input_bfd, contents + roff - 3);
+ if (roff >= 3)
+ val = bfd_get_8 (input_bfd, contents + roff - 3);
+ else
+ val = 0;
type = bfd_get_8 (input_bfd, contents + roff - 2);
reg = bfd_get_8 (input_bfd, contents + roff - 1);
reg >>= 3;
}
else if (reg == 4)
{
- /* addq -> addq - addressing with %rsp/%r12 is
- special */
+ /* addq/addl -> addq/addl - addressing with %rsp/%r12
+ is special */
if (val == 0x4c)
bfd_put_8 (output_bfd, 0x49,
contents + roff - 3);
}
else
{
- /* addq -> leaq */
+ /* addq/addl -> leaq/leal */
if (val == 0x4c)
bfd_put_8 (output_bfd, 0x4d,
contents + roff - 3);
.word 0x6666; rex64; call __tls_get_addr@plt
into:
movl %fs:0, %eax
- addq foo@gottpoff(%rip), %rax */
- if (ABI_64_P (output_bfd))
+ addq foo@gottpoff(%rip), %rax
+ For largepic, change:
+ leaq foo@tlsgd(%rip), %rdi
+ movabsq $__tls_get_addr@pltoff, %rax
+ addq %rbx, %rax
+ call *%rax
+ into:
+ movq %fs:0, %rax
+ addq foo@gottpoff(%rax), %rax
+ nopw 0x0(%rax,%rax,1) */
+ int largepic = 0;
+ if (ABI_64_P (output_bfd)
+ && contents[roff + 5] == (bfd_byte) '\xb8')
+ {
+ memcpy (contents + roff - 3,
+ "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05"
+ "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
+ largepic = 1;
+ }
+ else if (ABI_64_P (output_bfd))
memcpy (contents + roff - 4,
"\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
16);
relocation = (htab->elf.sgot->output_section->vma
+ htab->elf.sgot->output_offset + off
- roff
+ - largepic
- input_section->output_section->vma
- input_section->output_offset
- 12);
bfd_put_32 (output_bfd, relocation,
- contents + roff + 8);
- /* Skip R_X86_64_PLT32. */
+ contents + roff + 8 + largepic);
+ /* Skip R_X86_64_PLT32/R_X86_64_PLTOFF64. */
rel++;
continue;
}
For 64bit, we change it into:
.word 0x6666; .byte 0x66; movq %fs:0, %rax.
For 32bit, we change it into:
- nopl 0x0(%rax); movl %fs:0, %eax. */
+ nopl 0x0(%rax); movl %fs:0, %eax.
+ For largepic, change:
+ leaq foo@tlsgd(%rip), %rdi
+ movabsq $__tls_get_addr@pltoff, %rax
+ addq %rbx, %rax
+ call *%rax
+ into:
+ data32 data32 data32 nopw %cs:0x0(%rax,%rax,1)
+ movq %fs:0, %eax */
BFD_ASSERT (r_type == R_X86_64_TPOFF32);
- if (ABI_64_P (output_bfd))
+ if (ABI_64_P (output_bfd)
+ && contents[rel->r_offset + 5] == (bfd_byte) '\xb8')
+ memcpy (contents + rel->r_offset - 3,
+ "\x66\x66\x66\x66\x2e\x0f\x1f\x84\0\0\0\0\0"
+ "\x64\x48\x8b\x04\x25\0\0\0", 22);
+ else if (ABI_64_P (output_bfd))
memcpy (contents + rel->r_offset - 3,
"\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12);
else
memcpy (contents + rel->r_offset - 3,
"\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12);
- /* Skip R_X86_64_PC32/R_X86_64_PLT32. */
+ /* Skip R_X86_64_PC32/R_X86_64_PLT32/R_X86_64_PLTOFF64. */
rel++;
continue;
}
relocation = elf_x86_64_tpoff (info, relocation);
break;
+ case R_X86_64_DTPOFF64:
+ BFD_ASSERT ((input_section->flags & SEC_CODE) == 0);
+ relocation -= elf_x86_64_dtpoff_base (info);
+ break;
+
default:
break;
}
not process them. */
if (unresolved_reloc
&& !((input_section->flags & SEC_DEBUGGING) != 0
- && h->def_dynamic))
- (*_bfd_error_handler)
- (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
- input_bfd,
- input_section,
- (long) rel->r_offset,
- howto->name,
- h->root.root.string);
+ && h->def_dynamic)
+ && _bfd_elf_section_offset (output_bfd, info, input_section,
+ rel->r_offset) != (bfd_vma) -1)
+ {
+ (*_bfd_error_handler)
+ (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
+ input_bfd,
+ input_section,
+ (long) rel->r_offset,
+ howto->name,
+ h->root.root.string);
+ return FALSE;
+ }
do_relocation:
r = _bfd_final_link_relocate (howto, input_bfd, input_section,
elf_x86_64_finish_dynamic_symbol (bfd *output_bfd,
struct bfd_link_info *info,
struct elf_link_hash_entry *h,
- Elf_Internal_Sym *sym)
+ Elf_Internal_Sym *sym ATTRIBUTE_UNUSED)
{
struct elf_x86_64_link_hash_table *htab;
+ const struct elf_x86_64_backend_data *abed;
+ bfd_boolean use_plt_bnd;
htab = elf_x86_64_hash_table (info);
if (htab == NULL)
return FALSE;
+ /* Use MPX backend data in case of BND relocation. Use .plt_bnd
+ section only if there is .plt section. */
+ use_plt_bnd = htab->elf.splt != NULL && htab->plt_bnd != NULL;
+ abed = (use_plt_bnd
+ ? &elf_x86_64_bnd_arch_bed
+ : get_elf_x86_64_backend_data (output_bfd));
+
if (h->plt.offset != (bfd_vma) -1)
{
bfd_vma plt_index;
- bfd_vma got_offset;
+ bfd_vma got_offset, plt_offset, plt_plt_offset, plt_got_offset;
+ bfd_vma plt_plt_insn_end, plt_got_insn_size;
Elf_Internal_Rela rela;
bfd_byte *loc;
- asection *plt, *gotplt, *relplt;
+ asection *plt, *gotplt, *relplt, *resolved_plt;
const struct elf_backend_data *bed;
/* When building a static executable, use .iplt, .igot.plt and
|| plt == NULL
|| gotplt == NULL
|| relplt == NULL)
- return FALSE;
+ abort ();
/* Get the index in the procedure linkage table which
corresponds to this symbol. This is the index of this symbol
if (plt == htab->elf.splt)
{
- plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
- got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
+ got_offset = h->plt.offset / abed->plt_entry_size - 1;
+ got_offset = (got_offset + 3) * GOT_ENTRY_SIZE;
}
else
{
- plt_index = h->plt.offset / PLT_ENTRY_SIZE;
- got_offset = plt_index * GOT_ENTRY_SIZE;
+ got_offset = h->plt.offset / abed->plt_entry_size;
+ got_offset = got_offset * GOT_ENTRY_SIZE;
}
- /* Fill in the entry in the procedure linkage table. */
- memcpy (plt->contents + h->plt.offset, elf_x86_64_plt_entry,
- PLT_ENTRY_SIZE);
+ plt_plt_insn_end = abed->plt_plt_insn_end;
+ plt_plt_offset = abed->plt_plt_offset;
+ plt_got_insn_size = abed->plt_got_insn_size;
+ plt_got_offset = abed->plt_got_offset;
+ if (use_plt_bnd)
+ {
+ /* Use the second PLT with BND relocations. */
+ const bfd_byte *plt_entry, *plt2_entry;
+ struct elf_x86_64_link_hash_entry *eh
+ = (struct elf_x86_64_link_hash_entry *) h;
- /* Insert the relocation positions of the plt section. The magic
- numbers at the end of the statements are the positions of the
- relocations in the plt section. */
- /* Put offset for jmp *name@GOTPCREL(%rip), since the
- instruction uses 6 bytes, subtract this value. */
- bfd_put_32 (output_bfd,
- (gotplt->output_section->vma
- + gotplt->output_offset
- + got_offset
- - plt->output_section->vma
- - plt->output_offset
- - h->plt.offset
- - 6),
- plt->contents + h->plt.offset + 2);
+ if (eh->has_bnd_reloc)
+ {
+ plt_entry = elf_x86_64_bnd_plt_entry;
+ plt2_entry = elf_x86_64_bnd_plt2_entry;
+ }
+ else
+ {
+ plt_entry = elf_x86_64_legacy_plt_entry;
+ plt2_entry = elf_x86_64_legacy_plt2_entry;
+
+ /* Subtract 1 since there is no BND prefix. */
+ plt_plt_insn_end -= 1;
+ plt_plt_offset -= 1;
+ plt_got_insn_size -= 1;
+ plt_got_offset -= 1;
+ }
- /* Don't fill PLT entry for static executables. */
- if (plt == htab->elf.splt)
+ BFD_ASSERT (sizeof (elf_x86_64_bnd_plt_entry)
+ == sizeof (elf_x86_64_legacy_plt_entry));
+
+ /* Fill in the entry in the procedure linkage table. */
+ memcpy (plt->contents + h->plt.offset,
+ plt_entry, sizeof (elf_x86_64_legacy_plt_entry));
+ /* Fill in the entry in the second PLT. */
+ memcpy (htab->plt_bnd->contents + eh->plt_bnd.offset,
+ plt2_entry, sizeof (elf_x86_64_legacy_plt2_entry));
+
+ resolved_plt = htab->plt_bnd;
+ plt_offset = eh->plt_bnd.offset;
+ }
+ else
{
- /* Put relocation index. */
- bfd_put_32 (output_bfd, plt_index,
- plt->contents + h->plt.offset + 7);
- /* Put offset for jmp .PLT0. */
- bfd_put_32 (output_bfd, - (h->plt.offset + PLT_ENTRY_SIZE),
- plt->contents + h->plt.offset + 12);
+ /* Fill in the entry in the procedure linkage table. */
+ memcpy (plt->contents + h->plt.offset, abed->plt_entry,
+ abed->plt_entry_size);
+
+ resolved_plt = plt;
+ plt_offset = h->plt.offset;
}
+ /* Insert the relocation positions of the plt section. */
+
+ /* Put offset the PC-relative instruction referring to the GOT entry,
+ subtracting the size of that instruction. */
+ bfd_put_32 (output_bfd,
+ (gotplt->output_section->vma
+ + gotplt->output_offset
+ + got_offset
+ - resolved_plt->output_section->vma
+ - resolved_plt->output_offset
+ - plt_offset
+ - plt_got_insn_size),
+ resolved_plt->contents + plt_offset + plt_got_offset);
+
/* Fill in the entry in the global offset table, initially this
- points to the pushq instruction in the PLT which is at offset 6. */
+ points to the second part of the PLT entry. */
bfd_put_64 (output_bfd, (plt->output_section->vma
+ plt->output_offset
- + h->plt.offset + 6),
+ + h->plt.offset + abed->plt_lazy_offset),
gotplt->contents + got_offset);
/* Fill in the entry in the .rela.plt section. */
rela.r_addend = (h->root.u.def.value
+ h->root.u.def.section->output_section->vma
+ h->root.u.def.section->output_offset);
+ /* R_X86_64_IRELATIVE comes last. */
+ plt_index = htab->next_irelative_index--;
}
else
{
rela.r_info = htab->r_info (h->dynindx, R_X86_64_JUMP_SLOT);
rela.r_addend = 0;
+ plt_index = htab->next_jump_slot_index++;
+ }
+
+ /* Don't fill PLT entry for static executables. */
+ if (plt == htab->elf.splt)
+ {
+ /* Put relocation index. */
+ bfd_put_32 (output_bfd, plt_index,
+ plt->contents + h->plt.offset + abed->plt_reloc_offset);
+ /* Put offset for jmp .PLT0. */
+ bfd_put_32 (output_bfd, - (h->plt.offset + plt_plt_insn_end),
+ plt->contents + h->plt.offset + plt_plt_offset);
}
bed = get_elf_backend_data (output_bfd);
elf_append_rela (output_bfd, htab->srelbss, &rela);
}
- /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. SYM may
- be NULL for local symbols. */
- if (sym != NULL
- && (strcmp (h->root.root.string, "_DYNAMIC") == 0
- || h == htab->elf.hgot))
- sym->st_shndx = SHN_ABS;
-
return TRUE;
}
struct elf_link_hash_entry *h
= (struct elf_link_hash_entry *) *slot;
struct bfd_link_info *info
- = (struct bfd_link_info *) inf;
+ = (struct bfd_link_info *) inf;
return elf_x86_64_finish_dynamic_symbol (info->output_bfd,
info, h, NULL);
dynamic linker, before writing them out. */
static enum elf_reloc_type_class
-elf_x86_64_reloc_type_class (const Elf_Internal_Rela *rela)
+elf_x86_64_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
+ const asection *rel_sec ATTRIBUTE_UNUSED,
+ const Elf_Internal_Rela *rela)
{
switch ((int) ELF32_R_TYPE (rela->r_info))
{
case R_X86_64_RELATIVE:
+ case R_X86_64_RELATIVE64:
return reloc_class_relative;
case R_X86_64_JUMP_SLOT:
return reloc_class_plt;
struct elf_x86_64_link_hash_table *htab;
bfd *dynobj;
asection *sdyn;
+ const struct elf_x86_64_backend_data *abed;
htab = elf_x86_64_hash_table (info);
if (htab == NULL)
return FALSE;
+ /* Use MPX backend data in case of BND relocation. Use .plt_bnd
+ section only if there is .plt section. */
+ abed = (htab->elf.splt != NULL && htab->plt_bnd != NULL
+ ? &elf_x86_64_bnd_arch_bed
+ : get_elf_x86_64_backend_data (output_bfd));
+
dynobj = htab->elf.dynobj;
- sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
+ sdyn = bfd_get_linker_section (dynobj, ".dynamic");
if (htab->elf.dynamic_sections_created)
{
if (htab->elf.splt && htab->elf.splt->size > 0)
{
/* Fill in the first entry in the procedure linkage table. */
- memcpy (htab->elf.splt->contents, elf_x86_64_plt0_entry,
- PLT_ENTRY_SIZE);
+ memcpy (htab->elf.splt->contents,
+ abed->plt0_entry, abed->plt_entry_size);
/* Add offset for pushq GOT+8(%rip), since the instruction
uses 6 bytes subtract this value. */
bfd_put_32 (output_bfd,
- htab->elf.splt->output_section->vma
- htab->elf.splt->output_offset
- 6),
- htab->elf.splt->contents + 2);
- /* Add offset for jmp *GOT+16(%rip). The 12 is the offset to
- the end of the instruction. */
+ htab->elf.splt->contents + abed->plt0_got1_offset);
+ /* Add offset for the PC-relative instruction accessing GOT+16,
+ subtracting the offset to the end of that instruction. */
bfd_put_32 (output_bfd,
(htab->elf.sgotplt->output_section->vma
+ htab->elf.sgotplt->output_offset
+ 16
- htab->elf.splt->output_section->vma
- htab->elf.splt->output_offset
- - 12),
- htab->elf.splt->contents + 8);
+ - abed->plt0_got2_insn_end),
+ htab->elf.splt->contents + abed->plt0_got2_offset);
- elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize =
- PLT_ENTRY_SIZE;
+ elf_section_data (htab->elf.splt->output_section)
+ ->this_hdr.sh_entsize = abed->plt_entry_size;
if (htab->tlsdesc_plt)
{
htab->elf.sgot->contents + htab->tlsdesc_got);
memcpy (htab->elf.splt->contents + htab->tlsdesc_plt,
- elf_x86_64_plt0_entry,
- PLT_ENTRY_SIZE);
+ abed->plt0_entry, abed->plt_entry_size);
/* Add offset for pushq GOT+8(%rip), since the
instruction uses 6 bytes subtract this value. */
- htab->elf.splt->output_offset
- htab->tlsdesc_plt
- 6),
- htab->elf.splt->contents + htab->tlsdesc_plt + 2);
- /* Add offset for jmp *GOT+TDG(%rip), where TGD stands for
- htab->tlsdesc_got. The 12 is the offset to the end of
- the instruction. */
+ htab->elf.splt->contents
+ + htab->tlsdesc_plt + abed->plt0_got1_offset);
+ /* Add offset for the PC-relative instruction accessing GOT+TDG,
+ where TGD stands for htab->tlsdesc_got, subtracting the offset
+ to the end of that instruction. */
bfd_put_32 (output_bfd,
(htab->elf.sgot->output_section->vma
+ htab->elf.sgot->output_offset
- htab->elf.splt->output_section->vma
- htab->elf.splt->output_offset
- htab->tlsdesc_plt
- - 12),
- htab->elf.splt->contents + htab->tlsdesc_plt + 8);
+ - abed->plt0_got2_insn_end),
+ htab->elf.splt->contents
+ + htab->tlsdesc_plt + abed->plt0_got2_offset);
}
}
}
+ if (htab->plt_bnd != NULL)
+ elf_section_data (htab->plt_bnd->output_section)
+ ->this_hdr.sh_entsize = sizeof (elf_x86_64_bnd_plt2_entry);
+
if (htab->elf.sgotplt)
{
if (bfd_is_abs_section (htab->elf.sgotplt->output_section))
}
/* Adjust .eh_frame for .plt section. */
- if (htab->plt_eh_frame != NULL)
+ if (htab->plt_eh_frame != NULL
+ && htab->plt_eh_frame->contents != NULL)
{
if (htab->elf.splt != NULL
&& htab->elf.splt->size != 0
htab->plt_eh_frame->contents
+ PLT_FDE_START_OFFSET);
}
- if (htab->plt_eh_frame->sec_info_type
- == ELF_INFO_TYPE_EH_FRAME)
+ if (htab->plt_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME)
{
if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
htab->plt_eh_frame,
return TRUE;
}
-/* Return address for Ith PLT stub in section PLT, for relocation REL
- or (bfd_vma) -1 if it should not be included. */
+/* Return address in section PLT for the Ith GOTPLT relocation, for
+ relocation REL or (bfd_vma) -1 if it should not be included. */
static bfd_vma
elf_x86_64_plt_sym_val (bfd_vma i, const asection *plt,
- const arelent *rel ATTRIBUTE_UNUSED)
+ const arelent *rel)
+{
+ bfd *abfd;
+ const struct elf_x86_64_backend_data *bed;
+ bfd_vma plt_offset;
+
+ /* Only match R_X86_64_JUMP_SLOT and R_X86_64_IRELATIVE. */
+ if (rel->howto->type != R_X86_64_JUMP_SLOT
+ && rel->howto->type != R_X86_64_IRELATIVE)
+ return (bfd_vma) -1;
+
+ abfd = plt->owner;
+ bed = get_elf_x86_64_backend_data (abfd);
+ plt_offset = bed->plt_entry_size;
+
+ if (elf_elfheader (abfd)->e_ident[EI_OSABI] != ELFOSABI_GNU)
+ return plt->vma + (i + 1) * plt_offset;
+
+ while (plt_offset < plt->size)
+ {
+ bfd_vma reloc_index;
+ bfd_byte reloc_index_raw[4];
+
+ if (!bfd_get_section_contents (abfd, (asection *) plt,
+ reloc_index_raw,
+ plt_offset + bed->plt_reloc_offset,
+ sizeof (reloc_index_raw)))
+ return (bfd_vma) -1;
+
+ reloc_index = H_GET_32 (abfd, reloc_index_raw);
+ if (reloc_index == i)
+ return plt->vma + plt_offset;
+ plt_offset += bed->plt_entry_size;
+ }
+
+ abort ();
+}
+
+/* Return offset in .plt.bnd section for the Ith GOTPLT relocation with
+ PLT section, or (bfd_vma) -1 if it should not be included. */
+
+static bfd_vma
+elf_x86_64_plt_sym_val_offset_plt_bnd (bfd_vma i, const asection *plt)
+{
+ const struct elf_x86_64_backend_data *bed = &elf_x86_64_bnd_arch_bed;
+ bfd *abfd = plt->owner;
+ bfd_vma plt_offset = bed->plt_entry_size;
+
+ if (elf_elfheader (abfd)->e_ident[EI_OSABI] != ELFOSABI_GNU)
+ return i * sizeof (elf_x86_64_legacy_plt2_entry);
+
+ while (plt_offset < plt->size)
+ {
+ bfd_vma reloc_index;
+ bfd_byte reloc_index_raw[4];
+
+ if (!bfd_get_section_contents (abfd, (asection *) plt,
+ reloc_index_raw,
+ plt_offset + bed->plt_reloc_offset,
+ sizeof (reloc_index_raw)))
+ return (bfd_vma) -1;
+
+ reloc_index = H_GET_32 (abfd, reloc_index_raw);
+ if (reloc_index == i)
+ {
+ /* This is the index in .plt section. */
+ long plt_index = plt_offset / bed->plt_entry_size;
+ /* Return the offset in .plt.bnd section. */
+ return (plt_index - 1) * sizeof (elf_x86_64_legacy_plt2_entry);
+ }
+ plt_offset += bed->plt_entry_size;
+ }
+
+ abort ();
+}
+
+/* Similar to _bfd_elf_get_synthetic_symtab, with .plt.bnd section
+ support. */
+
+static long
+elf_x86_64_get_synthetic_symtab (bfd *abfd,
+ long symcount,
+ asymbol **syms,
+ long dynsymcount,
+ asymbol **dynsyms,
+ asymbol **ret)
{
- return plt->vma + (i + 1) * PLT_ENTRY_SIZE;
+ const struct elf_backend_data *bed = get_elf_backend_data (abfd);
+ asection *relplt;
+ asymbol *s;
+ bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
+ arelent *p;
+ long count, i, n;
+ size_t size;
+ Elf_Internal_Shdr *hdr;
+ char *names;
+ asection *plt, *plt_push;
+
+ plt_push = bfd_get_section_by_name (abfd, ".plt");
+ if (plt_push == NULL)
+ return 0;
+
+ plt = bfd_get_section_by_name (abfd, ".plt.bnd");
+ /* Use the generic ELF version if there is no .plt.bnd section. */
+ if (plt == NULL)
+ return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms,
+ dynsymcount, dynsyms, ret);
+
+ *ret = NULL;
+
+ if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
+ return 0;
+
+ if (dynsymcount <= 0)
+ return 0;
+
+ relplt = bfd_get_section_by_name (abfd, ".rela.plt");
+ if (relplt == NULL)
+ return 0;
+
+ hdr = &elf_section_data (relplt)->this_hdr;
+ if (hdr->sh_link != elf_dynsymtab (abfd)
+ || (hdr->sh_type != SHT_REL && hdr->sh_type != SHT_RELA))
+ return 0;
+
+ slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
+ if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
+ return -1;
+
+ count = relplt->size / hdr->sh_entsize;
+ size = count * sizeof (asymbol);
+ p = relplt->relocation;
+ for (i = 0; i < count; i++, p += bed->s->int_rels_per_ext_rel)
+ {
+ size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
+ if (p->addend != 0)
+ size += sizeof ("+0x") - 1 + 8 + 8;
+ }
+
+ s = *ret = (asymbol *) bfd_malloc (size);
+ if (s == NULL)
+ return -1;
+
+ names = (char *) (s + count);
+ p = relplt->relocation;
+ n = 0;
+ for (i = 0; i < count; i++, p++)
+ {
+ bfd_vma offset;
+ size_t len;
+
+ if (p->howto->type != R_X86_64_JUMP_SLOT
+ && p->howto->type != R_X86_64_IRELATIVE)
+ continue;
+
+ offset = elf_x86_64_plt_sym_val_offset_plt_bnd (i, plt_push);
+
+ *s = **p->sym_ptr_ptr;
+ /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
+ we are defining a symbol, ensure one of them is set. */
+ if ((s->flags & BSF_LOCAL) == 0)
+ s->flags |= BSF_GLOBAL;
+ s->flags |= BSF_SYNTHETIC;
+ s->section = plt;
+ s->value = offset;
+ s->name = names;
+ s->udata.p = NULL;
+ len = strlen ((*p->sym_ptr_ptr)->name);
+ memcpy (names, (*p->sym_ptr_ptr)->name, len);
+ names += len;
+ if (p->addend != 0)
+ {
+ char buf[30], *a;
+
+ memcpy (names, "+0x", sizeof ("+0x") - 1);
+ names += sizeof ("+0x") - 1;
+ bfd_sprintf_vma (abfd, buf, p->addend);
+ for (a = buf; *a == '0'; ++a)
+ ;
+ len = strlen (a);
+ memcpy (names, a, len);
+ names += len;
+ }
+ memcpy (names, "@plt", sizeof ("@plt"));
+ names += sizeof ("@plt");
+ ++s, ++n;
+ }
+
+ return n;
}
/* Handle an x86-64 specific section when reading an object file. This
is called when elfcode.h finds a section with an unknown type. */
static bfd_boolean
-elf_x86_64_section_from_shdr (bfd *abfd,
- Elf_Internal_Shdr *hdr,
- const char *name,
- int shindex)
+elf_x86_64_section_from_shdr (bfd *abfd, Elf_Internal_Shdr *hdr,
+ const char *name, int shindex)
{
if (hdr->sh_type != SHT_X86_64_UNWIND)
return FALSE;
return TRUE;
}
- if ((abfd->flags & DYNAMIC) == 0
- && (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
- || ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE))
+ if ((ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
+ || ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE)
+ && (abfd->flags & DYNAMIC) == 0
+ && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
return TRUE;
}
static bfd_boolean
-elf_x86_64_merge_symbol (struct bfd_link_info *info ATTRIBUTE_UNUSED,
- struct elf_link_hash_entry **sym_hash ATTRIBUTE_UNUSED,
- struct elf_link_hash_entry *h,
- Elf_Internal_Sym *sym,
+elf_x86_64_merge_symbol (struct elf_link_hash_entry *h,
+ const Elf_Internal_Sym *sym,
asection **psec,
- bfd_vma *pvalue ATTRIBUTE_UNUSED,
- unsigned int *pold_alignment ATTRIBUTE_UNUSED,
- bfd_boolean *skip ATTRIBUTE_UNUSED,
- bfd_boolean *override ATTRIBUTE_UNUSED,
- bfd_boolean *type_change_ok ATTRIBUTE_UNUSED,
- bfd_boolean *size_change_ok ATTRIBUTE_UNUSED,
- bfd_boolean *newdyn ATTRIBUTE_UNUSED,
- bfd_boolean *newdef,
- bfd_boolean *newdyncommon ATTRIBUTE_UNUSED,
- bfd_boolean *newweak ATTRIBUTE_UNUSED,
- bfd *abfd ATTRIBUTE_UNUSED,
- asection **sec,
- bfd_boolean *olddyn ATTRIBUTE_UNUSED,
- bfd_boolean *olddef,
- bfd_boolean *olddyncommon ATTRIBUTE_UNUSED,
- bfd_boolean *oldweak ATTRIBUTE_UNUSED,
+ bfd_boolean newdef,
+ bfd_boolean olddef,
bfd *oldbfd,
- asection **oldsec)
+ const asection *oldsec)
{
/* A normal common symbol and a large common symbol result in a
normal common symbol. We turn the large common symbol into a
normal one. */
- if (!*olddef
+ if (!olddef
&& h->root.type == bfd_link_hash_common
- && !*newdef
- && bfd_is_com_section (*sec)
- && *oldsec != *sec)
+ && !newdef
+ && bfd_is_com_section (*psec)
+ && oldsec != *psec)
{
if (sym->st_shndx == SHN_COMMON
- && (elf_section_flags (*oldsec) & SHF_X86_64_LARGE) != 0)
+ && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) != 0)
{
h->root.u.c.p->section
= bfd_make_section_old_way (oldbfd, "COMMON");
h->root.u.c.p->section->flags = SEC_ALLOC;
}
else if (sym->st_shndx == SHN_X86_64_LCOMMON
- && (elf_section_flags (*oldsec) & SHF_X86_64_LARGE) == 0)
- *psec = *sec = bfd_com_section_ptr;
+ && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) == 0)
+ *psec = bfd_com_section_ptr;
}
return TRUE;
{ NULL, 0, 0, 0, 0 }
};
-#define TARGET_LITTLE_SYM bfd_elf64_x86_64_vec
+#define TARGET_LITTLE_SYM x86_64_elf64_vec
#define TARGET_LITTLE_NAME "elf64-x86-64"
#define ELF_ARCH bfd_arch_i386
#define ELF_TARGET_ID X86_64_ELF_DATA
#define bfd_elf64_bfd_link_hash_table_create \
elf_x86_64_link_hash_table_create
-#define bfd_elf64_bfd_link_hash_table_free \
- elf_x86_64_link_hash_table_free
#define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup
#define bfd_elf64_bfd_reloc_name_lookup \
elf_x86_64_reloc_name_lookup
#define elf_backend_plt_sym_val elf_x86_64_plt_sym_val
#define elf_backend_object_p elf64_x86_64_elf_object_p
#define bfd_elf64_mkobject elf_x86_64_mkobject
+#define bfd_elf64_get_synthetic_symtab elf_x86_64_get_synthetic_symtab
#define elf_backend_section_from_shdr \
elf_x86_64_section_from_shdr
#define elf_backend_hash_symbol \
elf_x86_64_hash_symbol
-#define elf_backend_post_process_headers _bfd_elf_set_osabi
-
#include "elf64-target.h"
/* FreeBSD support. */
#undef TARGET_LITTLE_SYM
-#define TARGET_LITTLE_SYM bfd_elf64_x86_64_freebsd_vec
+#define TARGET_LITTLE_SYM x86_64_elf64_fbsd_vec
#undef TARGET_LITTLE_NAME
#define TARGET_LITTLE_NAME "elf64-x86-64-freebsd"
/* Solaris 2 support. */
#undef TARGET_LITTLE_SYM
-#define TARGET_LITTLE_SYM bfd_elf64_x86_64_sol2_vec
+#define TARGET_LITTLE_SYM x86_64_elf64_sol2_vec
#undef TARGET_LITTLE_NAME
#define TARGET_LITTLE_NAME "elf64-x86-64-sol2"
#include "elf64-target.h"
+#undef bfd_elf64_get_synthetic_symtab
+
+/* Native Client support. */
+
+static bfd_boolean
+elf64_x86_64_nacl_elf_object_p (bfd *abfd)
+{
+ /* Set the right machine number for a NaCl x86-64 ELF64 file. */
+ bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64_nacl);
+ return TRUE;
+}
+
+#undef TARGET_LITTLE_SYM
+#define TARGET_LITTLE_SYM x86_64_elf64_nacl_vec
+#undef TARGET_LITTLE_NAME
+#define TARGET_LITTLE_NAME "elf64-x86-64-nacl"
+#undef elf64_bed
+#define elf64_bed elf64_x86_64_nacl_bed
+
+#undef ELF_MAXPAGESIZE
+#undef ELF_MINPAGESIZE
+#undef ELF_COMMONPAGESIZE
+#define ELF_MAXPAGESIZE 0x10000
+#define ELF_MINPAGESIZE 0x10000
+#define ELF_COMMONPAGESIZE 0x10000
+
+/* Restore defaults. */
+#undef ELF_OSABI
+#undef elf_backend_static_tls_alignment
+#undef elf_backend_want_plt_sym
+#define elf_backend_want_plt_sym 0
+
+/* NaCl uses substantially different PLT entries for the same effects. */
+
+#undef elf_backend_plt_alignment
+#define elf_backend_plt_alignment 5
+#define NACL_PLT_ENTRY_SIZE 64
+#define NACLMASK 0xe0 /* 32-byte alignment mask. */
+
+static const bfd_byte elf_x86_64_nacl_plt0_entry[NACL_PLT_ENTRY_SIZE] =
+ {
+ 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
+ 0x4c, 0x8b, 0x1d, 16, 0, 0, 0, /* mov GOT+16(%rip), %r11 */
+ 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */
+ 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
+ 0x41, 0xff, 0xe3, /* jmpq *%r11 */
+
+ /* 9-byte nop sequence to pad out to the next 32-byte boundary. */
+ 0x66, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw 0x0(%rax,%rax,1) */
+
+ /* 32 bytes of nop to pad out to the standard size. */
+ 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
+ 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
+ 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
+ 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
+ 0x66, /* excess data32 prefix */
+ 0x90 /* nop */
+ };
+
+static const bfd_byte elf_x86_64_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] =
+ {
+ 0x4c, 0x8b, 0x1d, 0, 0, 0, 0, /* mov name@GOTPCREL(%rip),%r11 */
+ 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */
+ 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
+ 0x41, 0xff, 0xe3, /* jmpq *%r11 */
+
+ /* 15-byte nop sequence to pad out to the next 32-byte boundary. */
+ 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
+ 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
+
+ /* Lazy GOT entries point here (32-byte aligned). */
+ 0x68, /* pushq immediate */
+ 0, 0, 0, 0, /* replaced with index into relocation table. */
+ 0xe9, /* jmp relative */
+ 0, 0, 0, 0, /* replaced with offset to start of .plt0. */
+
+ /* 22 bytes of nop to pad out to the standard size. */
+ 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
+ 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
+ 0x0f, 0x1f, 0x80, 0, 0, 0, 0, /* nopl 0x0(%rax) */
+ };
+
+/* .eh_frame covering the .plt section. */
+
+static const bfd_byte elf_x86_64_nacl_eh_frame_plt[] =
+ {
+#if (PLT_CIE_LENGTH != 20 \
+ || PLT_FDE_LENGTH != 36 \
+ || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
+ || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
+# error "Need elf_x86_64_backend_data parameters for eh_frame_plt offsets!"
+#endif
+ PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
+ 0, 0, 0, 0, /* CIE ID */
+ 1, /* CIE version */
+ 'z', 'R', 0, /* Augmentation string */
+ 1, /* Code alignment factor */
+ 0x78, /* Data alignment factor */
+ 16, /* Return address column */
+ 1, /* Augmentation size */
+ DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
+ DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
+ DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
+ DW_CFA_nop, DW_CFA_nop,
+
+ PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
+ PLT_CIE_LENGTH + 8, 0, 0, 0,/* CIE pointer */
+ 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
+ 0, 0, 0, 0, /* .plt size goes here */
+ 0, /* Augmentation size */
+ DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */
+ DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
+ DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */
+ DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
+ DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
+ 13, /* Block length */
+ DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */
+ DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */
+ DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge,
+ DW_OP_lit3, DW_OP_shl, DW_OP_plus,
+ DW_CFA_nop, DW_CFA_nop
+ };
+
+static const struct elf_x86_64_backend_data elf_x86_64_nacl_arch_bed =
+ {
+ elf_x86_64_nacl_plt0_entry, /* plt0_entry */
+ elf_x86_64_nacl_plt_entry, /* plt_entry */
+ NACL_PLT_ENTRY_SIZE, /* plt_entry_size */
+ 2, /* plt0_got1_offset */
+ 9, /* plt0_got2_offset */
+ 13, /* plt0_got2_insn_end */
+ 3, /* plt_got_offset */
+ 33, /* plt_reloc_offset */
+ 38, /* plt_plt_offset */
+ 7, /* plt_got_insn_size */
+ 42, /* plt_plt_insn_end */
+ 32, /* plt_lazy_offset */
+ elf_x86_64_nacl_eh_frame_plt, /* eh_frame_plt */
+ sizeof (elf_x86_64_nacl_eh_frame_plt), /* eh_frame_plt_size */
+ };
+
+#undef elf_backend_arch_data
+#define elf_backend_arch_data &elf_x86_64_nacl_arch_bed
+
+#undef elf_backend_object_p
+#define elf_backend_object_p elf64_x86_64_nacl_elf_object_p
+#undef elf_backend_modify_segment_map
+#define elf_backend_modify_segment_map nacl_modify_segment_map
+#undef elf_backend_modify_program_headers
+#define elf_backend_modify_program_headers nacl_modify_program_headers
+#undef elf_backend_final_write_processing
+#define elf_backend_final_write_processing nacl_final_write_processing
+
+#include "elf64-target.h"
+
+/* Native Client x32 support. */
+
+static bfd_boolean
+elf32_x86_64_nacl_elf_object_p (bfd *abfd)
+{
+ /* Set the right machine number for a NaCl x86-64 ELF32 file. */
+ bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32_nacl);
+ return TRUE;
+}
+
+#undef TARGET_LITTLE_SYM
+#define TARGET_LITTLE_SYM x86_64_elf32_nacl_vec
+#undef TARGET_LITTLE_NAME
+#define TARGET_LITTLE_NAME "elf32-x86-64-nacl"
+#undef elf32_bed
+#define elf32_bed elf32_x86_64_nacl_bed
+
+#define bfd_elf32_bfd_link_hash_table_create \
+ elf_x86_64_link_hash_table_create
+#define bfd_elf32_bfd_reloc_type_lookup \
+ elf_x86_64_reloc_type_lookup
+#define bfd_elf32_bfd_reloc_name_lookup \
+ elf_x86_64_reloc_name_lookup
+#define bfd_elf32_mkobject \
+ elf_x86_64_mkobject
+
+#undef elf_backend_object_p
+#define elf_backend_object_p \
+ elf32_x86_64_nacl_elf_object_p
+
+#undef elf_backend_bfd_from_remote_memory
+#define elf_backend_bfd_from_remote_memory \
+ _bfd_elf32_bfd_from_remote_memory
+
+#undef elf_backend_size_info
+#define elf_backend_size_info \
+ _bfd_elf32_size_info
+
+#include "elf32-target.h"
+
+/* Restore defaults. */
+#undef elf_backend_object_p
+#define elf_backend_object_p elf64_x86_64_elf_object_p
+#undef elf_backend_bfd_from_remote_memory
+#undef elf_backend_size_info
+#undef elf_backend_modify_segment_map
+#undef elf_backend_modify_program_headers
+#undef elf_backend_final_write_processing
+
/* Intel L1OM support. */
static bfd_boolean
}
#undef TARGET_LITTLE_SYM
-#define TARGET_LITTLE_SYM bfd_elf64_l1om_vec
+#define TARGET_LITTLE_SYM l1om_elf64_vec
#undef TARGET_LITTLE_NAME
#define TARGET_LITTLE_NAME "elf64-l1om"
#undef ELF_ARCH
#undef elf_backend_object_p
#define elf_backend_object_p elf64_l1om_elf_object_p
-#undef elf_backend_static_tls_alignment
-
-#undef elf_backend_want_plt_sym
-#define elf_backend_want_plt_sym 0
+/* Restore defaults. */
+#undef ELF_MAXPAGESIZE
+#undef ELF_MINPAGESIZE
+#undef ELF_COMMONPAGESIZE
+#define ELF_MAXPAGESIZE 0x200000
+#define ELF_MINPAGESIZE 0x1000
+#define ELF_COMMONPAGESIZE 0x1000
+#undef elf_backend_plt_alignment
+#define elf_backend_plt_alignment 4
+#undef elf_backend_arch_data
+#define elf_backend_arch_data &elf_x86_64_arch_bed
#include "elf64-target.h"
/* FreeBSD L1OM support. */
#undef TARGET_LITTLE_SYM
-#define TARGET_LITTLE_SYM bfd_elf64_l1om_freebsd_vec
+#define TARGET_LITTLE_SYM l1om_elf64_fbsd_vec
#undef TARGET_LITTLE_NAME
#define TARGET_LITTLE_NAME "elf64-l1om-freebsd"
}
#undef TARGET_LITTLE_SYM
-#define TARGET_LITTLE_SYM bfd_elf64_k1om_vec
+#define TARGET_LITTLE_SYM k1om_elf64_vec
#undef TARGET_LITTLE_NAME
#define TARGET_LITTLE_NAME "elf64-k1om"
#undef ELF_ARCH
/* FreeBSD K1OM support. */
#undef TARGET_LITTLE_SYM
-#define TARGET_LITTLE_SYM bfd_elf64_k1om_freebsd_vec
+#define TARGET_LITTLE_SYM k1om_elf64_fbsd_vec
#undef TARGET_LITTLE_NAME
#define TARGET_LITTLE_NAME "elf64-k1om-freebsd"
/* 32bit x86-64 support. */
-static bfd_boolean
-elf32_x86_64_elf_object_p (bfd *abfd)
-{
- /* Set the right machine number for an x86-64 elf32 file. */
- bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32);
- return TRUE;
-}
-
#undef TARGET_LITTLE_SYM
-#define TARGET_LITTLE_SYM bfd_elf32_x86_64_vec
+#define TARGET_LITTLE_SYM x86_64_elf32_vec
#undef TARGET_LITTLE_NAME
#define TARGET_LITTLE_NAME "elf32-x86-64"
+#undef elf32_bed
#undef ELF_ARCH
#define ELF_ARCH bfd_arch_i386
#undef ELF_MACHINE_CODE
#define ELF_MACHINE_CODE EM_X86_64
-#define bfd_elf32_bfd_link_hash_table_create \
- elf_x86_64_link_hash_table_create
-#define bfd_elf32_bfd_link_hash_table_free \
- elf_x86_64_link_hash_table_free
-#define bfd_elf32_bfd_reloc_type_lookup \
- elf_x86_64_reloc_type_lookup
-#define bfd_elf32_bfd_reloc_name_lookup \
- elf_x86_64_reloc_name_lookup
-#define bfd_elf32_mkobject \
- elf_x86_64_mkobject
-
#undef ELF_OSABI
#undef elf_backend_object_p