/* Intel 80386/80486-specific support for 32-bit ELF
- Copyright (C) 1993-2017 Free Software Foundation, Inc.
+ Copyright (C) 1993-2019 Free Software Foundation, Inc.
This file is part of BFD, the Binary File Descriptor library.
Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
MA 02110-1301, USA. */
-#include "sysdep.h"
-#include "bfd.h"
-#include "bfdlink.h"
-#include "libbfd.h"
-#include "elf-bfd.h"
+#include "elfxx-x86.h"
#include "elf-nacl.h"
#include "elf-vxworks.h"
-#include "bfd_stdint.h"
-#include "objalloc.h"
-#include "hashtab.h"
#include "dwarf2.h"
#include "opcode/i386.h"
};
+#define X86_PCREL_TYPE_P(TYPE) ((TYPE) == R_386_PC32)
+
+#define X86_SIZE_TYPE_P(TYPE) ((TYPE) == R_386_SIZE32)
+
#ifdef DEBUG_GEN_RELOC
#define TRACE(str) \
fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
#endif
static reloc_howto_type *
-elf_i386_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
+elf_i386_reloc_type_lookup (bfd *abfd,
bfd_reloc_code_real_type code)
{
switch (code)
return &elf_howto_table[R_386_GNU_VTENTRY - R_386_vt_offset];
default:
- break;
+ TRACE ("Unknown");
+ /* xgettext:c-format */
+ _bfd_error_handler (_("%pB: unsupported relocation type: %#x"),
+ abfd, (int) code);
+ bfd_set_error (bfd_error_bad_value);
+ return NULL;
}
-
- TRACE ("Unknown");
- return 0;
}
static reloc_howto_type *
}
static reloc_howto_type *
-elf_i386_rtype_to_howto (bfd *abfd, unsigned r_type)
+elf_i386_rtype_to_howto (unsigned r_type)
{
unsigned int indx;
>= R_386_ext2 - R_386_ext)
&& ((indx = r_type - R_386_vt_offset) - R_386_ext2
>= R_386_vt - R_386_ext2))
- {
- /* xgettext:c-format */
- _bfd_error_handler (_("%B: invalid relocation type %d"),
- abfd, (int) r_type);
- indx = R_386_NONE;
- }
+ return NULL;
/* PR 17512: file: 0f67f69d. */
if (elf_howto_table [indx].type != r_type)
return NULL;
return &elf_howto_table[indx];
}
-static void
-elf_i386_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED,
+static bfd_boolean
+elf_i386_info_to_howto_rel (bfd *abfd,
arelent *cache_ptr,
Elf_Internal_Rela *dst)
{
unsigned int r_type = ELF32_R_TYPE (dst->r_info);
- cache_ptr->howto = elf_i386_rtype_to_howto (abfd, r_type);
+
+ if ((cache_ptr->howto = elf_i386_rtype_to_howto (r_type)) == NULL)
+ {
+ /* xgettext:c-format */
+ _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
+ abfd, r_type);
+ bfd_set_error (bfd_error_bad_value);
+ return FALSE;
+ }
+
+ return TRUE;
}
/* Return whether a symbol name implies a local label. The UnixWare
int pr_version = bfd_get_32 (abfd, note->descdata);
if (pr_version != 1)
- return FALSE;
+ return FALSE;
/* pr_cursig */
elf_tdata (abfd)->core->signal = bfd_get_32 (abfd, note->descdata + 20);
early in the link process, elf_i386_finish_dynamic_sections is
one of the last functions. */
+/* The size in bytes of an entry in the lazy procedure linkage table. */
-/* The name of the dynamic interpreter. This is put in the .interp
- section. */
-
-#define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
+#define LAZY_PLT_ENTRY_SIZE 16
-/* 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
- section, and instead use a dynamic relocation to point into the
- shared lib. */
-#define ELIMINATE_COPY_RELOCS 1
+/* The size in bytes of an entry in the non-lazy procedure linkage
+ table. */
-/* The size in bytes of an entry in the procedure linkage table. */
+#define NON_LAZY_PLT_ENTRY_SIZE 8
-#define PLT_ENTRY_SIZE 16
+/* The first entry in an absolute lazy procedure linkage table looks
+ like this. See the SVR4 ABI i386 supplement to see how this works.
+ Will be padded to LAZY_PLT_ENTRY_SIZE with lazy_plt->plt0_pad_byte. */
-/* The first entry in an absolute procedure linkage table looks like
- this. See the SVR4 ABI i386 supplement to see how this works.
- Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
-
-static const bfd_byte elf_i386_plt0_entry[12] =
+static const bfd_byte elf_i386_lazy_plt0_entry[12] =
{
0xff, 0x35, /* pushl contents of address */
0, 0, 0, 0, /* replaced with address of .got + 4. */
0, 0, 0, 0 /* replaced with address of .got + 8. */
};
-/* Subsequent entries in an absolute procedure linkage table look like
- this. */
+/* Subsequent entries in an absolute lazy procedure linkage table look
+ like this. */
-static const bfd_byte elf_i386_plt_entry[PLT_ENTRY_SIZE] =
+static const bfd_byte elf_i386_lazy_plt_entry[LAZY_PLT_ENTRY_SIZE] =
{
0xff, 0x25, /* jmp indirect */
0, 0, 0, 0, /* replaced with address of this symbol in .got. */
0, 0, 0, 0 /* replaced with offset to start of .plt. */
};
-/* The first entry in a PIC procedure linkage table look like this.
- Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
+/* The first entry in a PIC lazy procedure linkage table look like
+ this. Will be padded to LAZY_PLT_ENTRY_SIZE with
+ lazy_plt->plt0_pad_byte. */
-static const bfd_byte elf_i386_pic_plt0_entry[12] =
+static const bfd_byte elf_i386_pic_lazy_plt0_entry[12] =
{
0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */
};
-/* Subsequent entries in a PIC procedure linkage table look like this. */
+/* Subsequent entries in a PIC lazy procedure linkage table look like
+ this. */
-static const bfd_byte elf_i386_pic_plt_entry[PLT_ENTRY_SIZE] =
+static const bfd_byte elf_i386_pic_lazy_plt_entry[LAZY_PLT_ENTRY_SIZE] =
{
0xff, 0xa3, /* jmp *offset(%ebx) */
0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
0, 0, 0, 0 /* replaced with offset to start of .plt. */
};
-/* Entries in the GOT procedure linkage table look like this. */
+/* Entries in the non-lazy procedure linkage table look like this. */
-static const bfd_byte elf_i386_got_plt_entry[8] =
+static const bfd_byte elf_i386_non_lazy_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] =
{
0xff, 0x25, /* jmp indirect */
0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
0x66, 0x90 /* xchg %ax,%ax */
};
-/* Entries in the PIC GOT procedure linkage table look like this. */
+/* Entries in the PIC non-lazy procedure linkage table look like
+ this. */
-static const bfd_byte elf_i386_pic_got_plt_entry[8] =
+static const bfd_byte elf_i386_pic_non_lazy_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] =
{
0xff, 0xa3, /* jmp *offset(%ebx) */
0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
0x66, 0x90 /* xchg %ax,%ax */
};
-/* .eh_frame covering the .plt section. */
+/* The first entry in an absolute IBT-enabled lazy procedure linkage
+ table looks like this. */
+
+static const bfd_byte elf_i386_lazy_ibt_plt0_entry[LAZY_PLT_ENTRY_SIZE] =
+{
+ 0xff, 0x35, 0, 0, 0, 0, /* pushl GOT[1] */
+ 0xff, 0x25, 0, 0, 0, 0, /* jmp *GOT[2] */
+ 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */
+};
+
+/* Subsequent entries for an absolute IBT-enabled lazy procedure linkage
+ table look like this. Subsequent entries for a PIC IBT-enabled lazy
+ procedure linkage table are the same. */
+
+static const bfd_byte elf_i386_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] =
+{
+ 0xf3, 0x0f, 0x1e, 0xfb, /* endbr32 */
+ 0x68, 0, 0, 0, 0, /* pushl immediate */
+ 0xe9, 0, 0, 0, 0, /* jmp relative */
+ 0x66, 0x90 /* xchg %ax,%ax */
+};
+
+/* The first entry in a PIC IBT-enabled lazy procedure linkage table
+ look like. */
+
+static const bfd_byte elf_i386_pic_lazy_ibt_plt0_entry[LAZY_PLT_ENTRY_SIZE] =
+{
+ 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
+ 0xff, 0xa3, 8, 0, 0, 0, /* jmp *8(%ebx) */
+ 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */
+};
+
+/* Entries for branches with IBT-enabled in the absolute non-lazey
+ procedure linkage table look like this. They have the same size
+ as the lazy PLT entry. */
+
+static const bfd_byte elf_i386_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] =
+{
+ 0xf3, 0x0f, 0x1e, 0xfb, /* endbr32 */
+ 0xff, 0x25, 0, 0, 0, 0, /* jmp *name@GOT */
+ 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopw 0x0(%rax,%rax,1) */
+};
+
+/* Entries for branches with IBT-enabled in the PIC non-lazey procedure
+ linkage table look like this. They have the same size as the lazy
+ PLT entry. */
+
+static const bfd_byte elf_i386_pic_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] =
+{
+ 0xf3, 0x0f, 0x1e, 0xfb, /* endbr32 */
+ 0xff, 0xa3, 0, 0, 0, 0, /* jmp *name@GOT(%ebx) */
+ 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopw 0x0(%rax,%rax,1) */
+};
+
+/* .eh_frame covering the lazy .plt section. */
-static const bfd_byte elf_i386_eh_frame_plt[] =
+static const bfd_byte elf_i386_eh_frame_lazy_plt[] =
{
-#define PLT_CIE_LENGTH 20
-#define PLT_FDE_LENGTH 36
-#define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8
-#define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12
PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
0, 0, 0, 0, /* CIE ID */
1, /* CIE version */
DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
};
-/* .eh_frame covering the .plt.got section. */
+/* .eh_frame covering the lazy .plt section with IBT-enabled. */
-static const bfd_byte elf_i386_eh_frame_plt_got[] =
+static const bfd_byte elf_i386_eh_frame_lazy_ibt_plt[] =
{
-#define PLT_GOT_FDE_LENGTH 16
PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
0, 0, 0, 0, /* CIE ID */
1, /* CIE version */
DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
DW_CFA_nop, DW_CFA_nop,
- PLT_GOT_FDE_LENGTH, 0, 0, 0, /* FDE length */
+ PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
- 0, 0, 0, 0, /* the start of .plt.got goes here */
- 0, 0, 0, 0, /* .plt.got size goes here */
+ 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
+ 0, 0, 0, 0, /* .plt size goes here */
0, /* Augmentation size */
- DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
+ DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
+ DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
+ DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
+ DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
+ DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
+ 11, /* Block length */
+ DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
+ DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
+ DW_OP_lit15, DW_OP_and, DW_OP_lit9, DW_OP_ge,
+ DW_OP_lit2, DW_OP_shl, DW_OP_plus,
+ DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
};
-struct elf_i386_plt_layout
-{
- /* The first entry in an absolute procedure linkage table looks like this. */
- const bfd_byte *plt0_entry;
- unsigned int plt0_entry_size;
-
- /* 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;
+/* .eh_frame covering the non-lazy .plt section. */
- /* Later entries in an absolute procedure linkage table look like this. */
- const bfd_byte *plt_entry;
- unsigned int plt_entry_size;
-
- /* 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. */
-
- /* Offset into plt_entry where the initial value of the GOT entry points. */
- unsigned int plt_lazy_offset;
-
- /* The first entry in a PIC procedure linkage table looks like this. */
- const bfd_byte *pic_plt0_entry;
+static const bfd_byte elf_i386_eh_frame_non_lazy_plt[] =
+{
+#define PLT_GOT_FDE_LENGTH 16
+ 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 */
+ 0x7c, /* Data alignment factor */
+ 8, /* Return address column */
+ 1, /* Augmentation size */
+ DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
+ DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
+ DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
+ DW_CFA_nop, DW_CFA_nop,
- /* Subsequent entries in a PIC procedure linkage table look like this. */
- const bfd_byte *pic_plt_entry;
+ PLT_GOT_FDE_LENGTH, 0, 0, 0, /* FDE length */
+ PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
+ 0, 0, 0, 0, /* the start of non-lazy .plt goes here */
+ 0, 0, 0, 0, /* non-lazy .plt size goes here */
+ 0, /* Augmentation size */
+ DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
+};
- /* .eh_frame covering the .plt section. */
- const bfd_byte *eh_frame_plt;
- unsigned int eh_frame_plt_size;
+/* These are the standard parameters. */
+static const struct elf_x86_lazy_plt_layout elf_i386_lazy_plt =
+ {
+ elf_i386_lazy_plt0_entry, /* plt0_entry */
+ sizeof (elf_i386_lazy_plt0_entry), /* plt0_entry_size */
+ elf_i386_lazy_plt_entry, /* plt_entry */
+ LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
+ NULL, /* plt_tlsdesc_entry */
+ 0, /* plt_tlsdesc_entry_size*/
+ 0, /* plt_tlsdesc_got1_offset */
+ 0, /* plt_tlsdesc_got2_offset */
+ 0, /* plt_tlsdesc_got1_insn_end */
+ 0, /* plt_tlsdesc_got2_insn_end */
+ 2, /* plt0_got1_offset */
+ 8, /* plt0_got2_offset */
+ 0, /* plt0_got2_insn_end */
+ 2, /* plt_got_offset */
+ 7, /* plt_reloc_offset */
+ 12, /* plt_plt_offset */
+ 0, /* plt_got_insn_size */
+ 0, /* plt_plt_insn_end */
+ 6, /* plt_lazy_offset */
+ elf_i386_pic_lazy_plt0_entry, /* pic_plt0_entry */
+ elf_i386_pic_lazy_plt_entry, /* pic_plt_entry */
+ elf_i386_eh_frame_lazy_plt, /* eh_frame_plt */
+ sizeof (elf_i386_eh_frame_lazy_plt) /* eh_frame_plt_size */
+ };
- /* .eh_frame covering the .plt.got section. */
- const bfd_byte *eh_frame_plt_got;
- unsigned int eh_frame_plt_got_size;
-};
+static const struct elf_x86_non_lazy_plt_layout elf_i386_non_lazy_plt =
+ {
+ elf_i386_non_lazy_plt_entry, /* plt_entry */
+ elf_i386_pic_non_lazy_plt_entry, /* pic_plt_entry */
+ NON_LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
+ 2, /* plt_got_offset */
+ 0, /* plt_got_insn_size */
+ elf_i386_eh_frame_non_lazy_plt, /* eh_frame_plt */
+ sizeof (elf_i386_eh_frame_non_lazy_plt) /* eh_frame_plt_size */
+ };
-#define GET_PLT_ENTRY_SIZE(abfd) \
- get_elf_i386_backend_data (abfd)->plt->plt_entry_size
+static const struct elf_x86_lazy_plt_layout elf_i386_lazy_ibt_plt =
+ {
+ elf_i386_lazy_ibt_plt0_entry, /* plt0_entry */
+ sizeof (elf_i386_lazy_ibt_plt0_entry), /* plt0_entry_size */
+ elf_i386_lazy_ibt_plt_entry, /* plt_entry */
+ LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
+ NULL, /* plt_tlsdesc_entry */
+ 0, /* plt_tlsdesc_entry_size*/
+ 0, /* plt_tlsdesc_got1_offset */
+ 0, /* plt_tlsdesc_got2_offset */
+ 0, /* plt_tlsdesc_got1_insn_end */
+ 0, /* plt_tlsdesc_got2_insn_end */
+ 2, /* plt0_got1_offset */
+ 8, /* plt0_got2_offset */
+ 0, /* plt0_got2_insn_end */
+ 4+2, /* plt_got_offset */
+ 4+1, /* plt_reloc_offset */
+ 4+6, /* plt_plt_offset */
+ 0, /* plt_got_insn_size */
+ 0, /* plt_plt_insn_end */
+ 0, /* plt_lazy_offset */
+ elf_i386_pic_lazy_ibt_plt0_entry, /* pic_plt0_entry */
+ elf_i386_lazy_ibt_plt_entry, /* pic_plt_entry */
+ elf_i386_eh_frame_lazy_ibt_plt, /* eh_frame_plt */
+ sizeof (elf_i386_eh_frame_lazy_ibt_plt) /* eh_frame_plt_size */
+ };
-/* These are the standard parameters. */
-static const struct elf_i386_plt_layout elf_i386_plt =
+static const struct elf_x86_non_lazy_plt_layout elf_i386_non_lazy_ibt_plt =
{
- elf_i386_plt0_entry, /* plt0_entry */
- sizeof (elf_i386_plt0_entry), /* plt0_entry_size */
- 2, /* plt0_got1_offset */
- 8, /* plt0_got2_offset */
- elf_i386_plt_entry, /* plt_entry */
- PLT_ENTRY_SIZE, /* plt_entry_size */
- 2, /* plt_got_offset */
- 7, /* plt_reloc_offset */
- 12, /* plt_plt_offset */
- 6, /* plt_lazy_offset */
- elf_i386_pic_plt0_entry, /* pic_plt0_entry */
- elf_i386_pic_plt_entry, /* pic_plt_entry */
- elf_i386_eh_frame_plt, /* eh_frame_plt */
- sizeof (elf_i386_eh_frame_plt), /* eh_frame_plt_size */
- elf_i386_eh_frame_plt_got, /* eh_frame_plt_got */
- sizeof (elf_i386_eh_frame_plt_got), /* eh_frame_plt_got_size */
+ elf_i386_non_lazy_ibt_plt_entry, /* plt_entry */
+ elf_i386_pic_non_lazy_ibt_plt_entry,/* pic_plt_entry */
+ LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
+ 4+2, /* plt_got_offset */
+ 0, /* plt_got_insn_size */
+ elf_i386_eh_frame_non_lazy_plt, /* eh_frame_plt */
+ sizeof (elf_i386_eh_frame_non_lazy_plt) /* eh_frame_plt_size */
};
\f
#define PLTRESOLVE_RELOCS 2
#define PLT_NON_JUMP_SLOT_RELOCS 2
-/* Architecture-specific backend data for i386. */
-
-struct elf_i386_backend_data
-{
- /* Parameters describing PLT generation. */
- const struct elf_i386_plt_layout *plt;
-
- /* Value used to fill the unused bytes of the first PLT entry. */
- bfd_byte plt0_pad_byte;
-
- /* True if the target system is VxWorks. */
- int is_vxworks;
-};
-
-#define get_elf_i386_backend_data(abfd) \
- ((const struct elf_i386_backend_data *) \
- get_elf_backend_data (abfd)->arch_data)
-
/* These are the standard parameters. */
-static const struct elf_i386_backend_data elf_i386_arch_bed =
+static const struct elf_x86_backend_data elf_i386_arch_bed =
{
- &elf_i386_plt, /* plt */
- 0, /* plt0_pad_byte */
- 0, /* is_vxworks */
+ is_normal /* os */
};
#define elf_backend_arch_data &elf_i386_arch_bed
-/* Is a undefined weak symbol which is resolved to 0. Reference to an
- undefined weak symbol is resolved to 0 when building executable if
- it isn't dynamic and
- 1. Has non-GOT/non-PLT relocations in text section. Or
- 2. Has no GOT/PLT relocation.
- */
-#define UNDEFINED_WEAK_RESOLVED_TO_ZERO(INFO, GOT_RELOC, EH) \
- ((EH)->elf.root.type == bfd_link_hash_undefweak \
- && bfd_link_executable (INFO) \
- && (elf_i386_hash_table (INFO)->interp == NULL \
- || !(GOT_RELOC) \
- || (EH)->has_non_got_reloc \
- || !(INFO)->dynamic_undefined_weak))
-
-/* i386 ELF linker hash entry. */
-
-struct elf_i386_link_hash_entry
-{
- struct elf_link_hash_entry elf;
-
- /* Track dynamic relocs copied for this symbol. */
- struct elf_dyn_relocs *dyn_relocs;
-
-#define GOT_UNKNOWN 0
-#define GOT_NORMAL 1
-#define GOT_TLS_GD 2
-#define GOT_TLS_IE 4
-#define GOT_TLS_IE_POS 5
-#define GOT_TLS_IE_NEG 6
-#define GOT_TLS_IE_BOTH 7
-#define GOT_TLS_GDESC 8
-#define GOT_TLS_GD_BOTH_P(type) \
- ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
-#define GOT_TLS_GD_P(type) \
- ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
-#define GOT_TLS_GDESC_P(type) \
- ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
-#define GOT_TLS_GD_ANY_P(type) \
- (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
- unsigned char tls_type;
-
- /* Symbol is referenced by R_386_GOTOFF relocation. */
- unsigned int gotoff_ref : 1;
-
- /* Symbol has GOT or PLT relocations. */
- unsigned int has_got_reloc : 1;
-
- /* Symbol has non-GOT/non-PLT relocations in text sections. */
- unsigned int has_non_got_reloc : 1;
-
- /* Don't call finish_dynamic_symbol on this symbol. */
- unsigned int no_finish_dynamic_symbol : 1;
-
- /* 0: symbol isn't ___tls_get_addr.
- 1: symbol is ___tls_get_addr.
- 2: symbol is unknown. */
- unsigned int tls_get_addr : 2;
-
- /* Reference count of C/C++ function pointer relocations in read-write
- section which can be resolved at run-time. */
- bfd_signed_vma func_pointer_refcount;
-
- /* Information about the GOT PLT entry. Filled when there are both
- GOT and PLT relocations against the same function. */
- union gotplt_union plt_got;
-
- /* Offset of the GOTPLT entry reserved for the TLS descriptor,
- starting at the end of the jump table. */
- bfd_vma tlsdesc_got;
-};
-
-#define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent))
-
-struct elf_i386_obj_tdata
-{
- struct elf_obj_tdata root;
-
- /* tls_type for each local got entry. */
- char *local_got_tls_type;
-
- /* GOTPLT entries for TLS descriptors. */
- bfd_vma *local_tlsdesc_gotent;
-};
-
-#define elf_i386_tdata(abfd) \
- ((struct elf_i386_obj_tdata *) (abfd)->tdata.any)
-
-#define elf_i386_local_got_tls_type(abfd) \
- (elf_i386_tdata (abfd)->local_got_tls_type)
-
-#define elf_i386_local_tlsdesc_gotent(abfd) \
- (elf_i386_tdata (abfd)->local_tlsdesc_gotent)
-
-#define is_i386_elf(bfd) \
- (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
- && elf_tdata (bfd) != NULL \
- && elf_object_id (bfd) == I386_ELF_DATA)
+/* Return TRUE if the TLS access code sequence support transition
+ from R_TYPE. */
static bfd_boolean
-elf_i386_mkobject (bfd *abfd)
-{
- return bfd_elf_allocate_object (abfd, sizeof (struct elf_i386_obj_tdata),
- I386_ELF_DATA);
-}
-
-/* i386 ELF linker hash table. */
-
-struct elf_i386_link_hash_table
+elf_i386_check_tls_transition (asection *sec,
+ bfd_byte *contents,
+ Elf_Internal_Shdr *symtab_hdr,
+ struct elf_link_hash_entry **sym_hashes,
+ unsigned int r_type,
+ const Elf_Internal_Rela *rel,
+ const Elf_Internal_Rela *relend)
{
- struct elf_link_hash_table elf;
-
- /* Short-cuts to get to dynamic linker sections. */
- asection *interp;
- asection *plt_eh_frame;
- asection *plt_got;
- asection *plt_got_eh_frame;
+ unsigned int val, type, reg;
+ unsigned long r_symndx;
+ struct elf_link_hash_entry *h;
+ bfd_vma offset;
+ bfd_byte *call;
+ bfd_boolean indirect_call;
- union
- {
- bfd_signed_vma refcount;
- bfd_vma offset;
- } tls_ldm_got;
+ offset = rel->r_offset;
+ switch (r_type)
+ {
+ case R_386_TLS_GD:
+ case R_386_TLS_LDM:
+ if (offset < 2 || (rel + 1) >= relend)
+ return FALSE;
- /* The amount of space used by the reserved portion of the sgotplt
- section, plus whatever space is used by the jump slots. */
- bfd_vma sgotplt_jump_table_size;
+ indirect_call = FALSE;
+ call = contents + offset + 4;
+ val = *(call - 5);
+ type = *(call - 6);
+ if (r_type == R_386_TLS_GD)
+ {
+ /* Check transition from GD access model. Only
+ leal foo@tlsgd(,%ebx,1), %eax
+ call ___tls_get_addr@PLT
+ or
+ leal foo@tlsgd(%ebx) %eax
+ call ___tls_get_addr@PLT
+ nop
+ or
+ leal foo@tlsgd(%reg), %eax
+ call *___tls_get_addr@GOT(%reg)
+ which may be converted to
+ addr32 call ___tls_get_addr
+ can transit to different access model. */
+ if ((offset + 10) > sec->size
+ || (type != 0x8d && type != 0x04))
+ return FALSE;
- /* Small local sym cache. */
- struct sym_cache sym_cache;
+ if (type == 0x04)
+ {
+ /* leal foo@tlsgd(,%ebx,1), %eax
+ call ___tls_get_addr@PLT */
+ if (offset < 3)
+ return FALSE;
- /* _TLS_MODULE_BASE_ symbol. */
- struct bfd_link_hash_entry *tls_module_base;
+ if (*(call - 7) != 0x8d
+ || val != 0x1d
+ || call[0] != 0xe8)
+ return FALSE;
+ }
+ else
+ {
+ /* This must be
+ leal foo@tlsgd(%ebx), %eax
+ call ___tls_get_addr@PLT
+ nop
+ or
+ leal foo@tlsgd(%reg), %eax
+ call *___tls_get_addr@GOT(%reg)
+ which may be converted to
+ addr32 call ___tls_get_addr
- /* Used by local STT_GNU_IFUNC symbols. */
- htab_t loc_hash_table;
- void * loc_hash_memory;
+ %eax can't be used as the GOT base register since it
+ is used to pass parameter to ___tls_get_addr. */
+ reg = val & 7;
+ if ((val & 0xf8) != 0x80 || reg == 4 || reg == 0)
+ return FALSE;
- /* The (unloaded but important) .rel.plt.unloaded section on VxWorks. */
- asection *srelplt2;
+ indirect_call = call[0] == 0xff;
+ if (!(reg == 3 && call[0] == 0xe8 && call[5] == 0x90)
+ && !(call[0] == 0x67 && call[1] == 0xe8)
+ && !(indirect_call
+ && (call[1] & 0xf8) == 0x90
+ && (call[1] & 0x7) == reg))
+ return FALSE;
+ }
+ }
+ else
+ {
+ /* Check transition from LD access model. Only
+ leal foo@tlsldm(%ebx), %eax
+ call ___tls_get_addr@PLT
+ or
+ leal foo@tlsldm(%reg), %eax
+ call *___tls_get_addr@GOT(%reg)
+ which may be converted to
+ addr32 call ___tls_get_addr
+ can transit to different access model. */
+ if (type != 0x8d || (offset + 9) > sec->size)
+ return FALSE;
- /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. */
- bfd_vma next_tls_desc_index;
+ /* %eax can't be used as the GOT base register since it is
+ used to pass parameter to ___tls_get_addr. */
+ reg = val & 7;
+ if ((val & 0xf8) != 0x80 || reg == 4 || reg == 0)
+ return FALSE;
- /* The index of the next unused R_386_JUMP_SLOT slot in .rel.plt. */
- bfd_vma next_jump_slot_index;
+ indirect_call = call[0] == 0xff;
+ if (!(reg == 3 && call[0] == 0xe8)
+ && !(call[0] == 0x67 && call[1] == 0xe8)
+ && !(indirect_call
+ && (call[1] & 0xf8) == 0x90
+ && (call[1] & 0x7) == reg))
+ return FALSE;
+ }
- /* The index of the next unused R_386_IRELATIVE slot in .rel.plt. */
- bfd_vma next_irelative_index;
+ r_symndx = ELF32_R_SYM (rel[1].r_info);
+ if (r_symndx < symtab_hdr->sh_info)
+ return FALSE;
- /* TRUE if there are dynamic relocs against IFUNC symbols that apply
- to read-only sections. */
- bfd_boolean readonly_dynrelocs_against_ifunc;
-};
+ h = sym_hashes[r_symndx - symtab_hdr->sh_info];
+ if (h == NULL
+ || !((struct elf_x86_link_hash_entry *) h)->tls_get_addr)
+ return FALSE;
+ else if (indirect_call)
+ return (ELF32_R_TYPE (rel[1].r_info) == R_386_GOT32X);
+ else
+ return (ELF32_R_TYPE (rel[1].r_info) == R_386_PC32
+ || ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32);
-/* Get the i386 ELF linker hash table from a link_info structure. */
+ case R_386_TLS_IE:
+ /* Check transition from IE access model:
+ movl foo@indntpoff(%rip), %eax
+ movl foo@indntpoff(%rip), %reg
+ addl foo@indntpoff(%rip), %reg
+ */
-#define elf_i386_hash_table(p) \
- (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
- == I386_ELF_DATA ? ((struct elf_i386_link_hash_table *) ((p)->hash)) : NULL)
+ if (offset < 1 || (offset + 4) > sec->size)
+ return FALSE;
-#define elf_i386_compute_jump_table_size(htab) \
- ((htab)->elf.srelplt->reloc_count * 4)
+ /* Check "movl foo@tpoff(%rip), %eax" first. */
+ val = bfd_get_8 (abfd, contents + offset - 1);
+ if (val == 0xa1)
+ return TRUE;
-/* Create an entry in an i386 ELF linker hash table. */
+ if (offset < 2)
+ return FALSE;
-static struct bfd_hash_entry *
-elf_i386_link_hash_newfunc (struct bfd_hash_entry *entry,
- struct bfd_hash_table *table,
- const char *string)
-{
- /* Allocate the structure if it has not already been allocated by a
- subclass. */
- if (entry == NULL)
- {
- entry = (struct bfd_hash_entry *)
- bfd_hash_allocate (table, sizeof (struct elf_i386_link_hash_entry));
- if (entry == NULL)
- return entry;
- }
-
- /* Call the allocation method of the superclass. */
- entry = _bfd_elf_link_hash_newfunc (entry, table, string);
- if (entry != NULL)
- {
- struct elf_i386_link_hash_entry *eh;
-
- eh = (struct elf_i386_link_hash_entry *) entry;
- eh->dyn_relocs = NULL;
- eh->tls_type = GOT_UNKNOWN;
- eh->gotoff_ref = 0;
- eh->has_got_reloc = 0;
- eh->has_non_got_reloc = 0;
- eh->no_finish_dynamic_symbol = 0;
- eh->tls_get_addr = 2;
- eh->func_pointer_refcount = 0;
- eh->plt_got.offset = (bfd_vma) -1;
- eh->tlsdesc_got = (bfd_vma) -1;
- }
+ /* Check movl|addl foo@tpoff(%rip), %reg. */
+ type = bfd_get_8 (abfd, contents + offset - 2);
+ return ((type == 0x8b || type == 0x03)
+ && (val & 0xc7) == 0x05);
- return entry;
-}
+ case R_386_TLS_GOTIE:
+ case R_386_TLS_IE_32:
+ /* Check transition from {IE_32,GOTIE} access model:
+ subl foo@{tpoff,gontoff}(%reg1), %reg2
+ movl foo@{tpoff,gontoff}(%reg1), %reg2
+ addl foo@{tpoff,gontoff}(%reg1), %reg2
+ */
-/* Compute a hash of a local hash entry. We use elf_link_hash_entry
- for local symbol so that we can handle local STT_GNU_IFUNC symbols
- as global symbol. We reuse indx and dynstr_index for local symbol
- hash since they aren't used by global symbols in this backend. */
+ if (offset < 2 || (offset + 4) > sec->size)
+ return FALSE;
-static hashval_t
-elf_i386_local_htab_hash (const void *ptr)
-{
- struct elf_link_hash_entry *h
- = (struct elf_link_hash_entry *) ptr;
- return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index);
-}
+ val = bfd_get_8 (abfd, contents + offset - 1);
+ if ((val & 0xc0) != 0x80 || (val & 7) == 4)
+ return FALSE;
-/* Compare local hash entries. */
+ type = bfd_get_8 (abfd, contents + offset - 2);
+ return type == 0x8b || type == 0x2b || type == 0x03;
-static int
-elf_i386_local_htab_eq (const void *ptr1, const void *ptr2)
-{
- struct elf_link_hash_entry *h1
- = (struct elf_link_hash_entry *) ptr1;
- struct elf_link_hash_entry *h2
- = (struct elf_link_hash_entry *) ptr2;
+ case R_386_TLS_GOTDESC:
+ /* Check transition from GDesc access model:
+ leal x@tlsdesc(%ebx), %eax
- return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index;
-}
+ Make sure it's a leal adding ebx to a 32-bit offset
+ into any register, although it's probably almost always
+ going to be eax. */
-/* Find and/or create a hash entry for local symbol. */
+ if (offset < 2 || (offset + 4) > sec->size)
+ return FALSE;
-static struct elf_link_hash_entry *
-elf_i386_get_local_sym_hash (struct elf_i386_link_hash_table *htab,
- bfd *abfd, const Elf_Internal_Rela *rel,
- bfd_boolean create)
-{
- struct elf_i386_link_hash_entry e, *ret;
- asection *sec = abfd->sections;
- hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id,
- ELF32_R_SYM (rel->r_info));
- void **slot;
-
- e.elf.indx = sec->id;
- e.elf.dynstr_index = ELF32_R_SYM (rel->r_info);
- slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h,
- create ? INSERT : NO_INSERT);
-
- if (!slot)
- return NULL;
+ if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
+ return FALSE;
- if (*slot)
- {
- ret = (struct elf_i386_link_hash_entry *) *slot;
- return &ret->elf;
- }
+ val = bfd_get_8 (abfd, contents + offset - 1);
+ return (val & 0xc7) == 0x83;
- ret = (struct elf_i386_link_hash_entry *)
- objalloc_alloc ((struct objalloc *) htab->loc_hash_memory,
- sizeof (struct elf_i386_link_hash_entry));
- if (ret)
- {
- memset (ret, 0, sizeof (*ret));
- ret->elf.indx = sec->id;
- ret->elf.dynstr_index = ELF32_R_SYM (rel->r_info);
- ret->elf.dynindx = -1;
- ret->func_pointer_refcount = 0;
- ret->plt_got.offset = (bfd_vma) -1;
- *slot = ret;
- }
- return &ret->elf;
-}
+ case R_386_TLS_DESC_CALL:
+ /* Check transition from GDesc access model:
+ call *x@tlsdesc(%eax)
+ */
+ if (offset + 2 <= sec->size)
+ {
+ /* Make sure that it's a call *x@tlsdesc(%eax). */
+ call = contents + offset;
+ return call[0] == 0xff && call[1] == 0x10;
+ }
-/* Destroy an i386 ELF linker hash table. */
+ return FALSE;
-static void
-elf_i386_link_hash_table_free (bfd *obfd)
-{
- struct elf_i386_link_hash_table *htab
- = (struct elf_i386_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);
+ default:
+ abort ();
+ }
}
-/* Create an i386 ELF linker hash table. */
+/* Return TRUE if the TLS access transition is OK or no transition
+ will be performed. Update R_TYPE if there is a transition. */
-static struct bfd_link_hash_table *
-elf_i386_link_hash_table_create (bfd *abfd)
+static bfd_boolean
+elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd,
+ asection *sec, bfd_byte *contents,
+ Elf_Internal_Shdr *symtab_hdr,
+ struct elf_link_hash_entry **sym_hashes,
+ unsigned int *r_type, int tls_type,
+ const Elf_Internal_Rela *rel,
+ const Elf_Internal_Rela *relend,
+ struct elf_link_hash_entry *h,
+ unsigned long r_symndx,
+ bfd_boolean from_relocate_section)
{
- struct elf_i386_link_hash_table *ret;
- bfd_size_type amt = sizeof (struct elf_i386_link_hash_table);
+ unsigned int from_type = *r_type;
+ unsigned int to_type = from_type;
+ bfd_boolean check = TRUE;
- ret = (struct elf_i386_link_hash_table *) bfd_zmalloc (amt);
- if (ret == NULL)
- return NULL;
+ /* Skip TLS transition for functions. */
+ if (h != NULL
+ && (h->type == STT_FUNC
+ || h->type == STT_GNU_IFUNC))
+ return TRUE;
- if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
- elf_i386_link_hash_newfunc,
- sizeof (struct elf_i386_link_hash_entry),
- I386_ELF_DATA))
+ switch (from_type)
{
- free (ret);
- return NULL;
- }
+ case R_386_TLS_GD:
+ case R_386_TLS_GOTDESC:
+ case R_386_TLS_DESC_CALL:
+ case R_386_TLS_IE_32:
+ case R_386_TLS_IE:
+ case R_386_TLS_GOTIE:
+ if (bfd_link_executable (info))
+ {
+ if (h == NULL)
+ to_type = R_386_TLS_LE_32;
+ else if (from_type != R_386_TLS_IE
+ && from_type != R_386_TLS_GOTIE)
+ to_type = R_386_TLS_IE_32;
+ }
- ret->loc_hash_table = htab_try_create (1024,
- elf_i386_local_htab_hash,
- elf_i386_local_htab_eq,
- NULL);
- ret->loc_hash_memory = objalloc_create ();
- if (!ret->loc_hash_table || !ret->loc_hash_memory)
- {
- elf_i386_link_hash_table_free (abfd);
- return NULL;
- }
- ret->elf.root.hash_table_free = elf_i386_link_hash_table_free;
+ /* When we are called from elf_i386_relocate_section, there may
+ be additional transitions based on TLS_TYPE. */
+ if (from_relocate_section)
+ {
+ unsigned int new_to_type = to_type;
- return &ret->elf.root;
-}
+ if (TLS_TRANSITION_IE_TO_LE_P (info, h, tls_type))
+ new_to_type = R_386_TLS_LE_32;
-/* 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. */
+ if (to_type == R_386_TLS_GD
+ || to_type == R_386_TLS_GOTDESC
+ || to_type == R_386_TLS_DESC_CALL)
+ {
+ if (tls_type == GOT_TLS_IE_POS)
+ new_to_type = R_386_TLS_GOTIE;
+ else if (tls_type & GOT_TLS_IE)
+ new_to_type = R_386_TLS_IE_32;
+ }
-static bfd_boolean
-elf_i386_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
-{
- struct elf_i386_link_hash_table *htab;
+ /* We checked the transition before when we were called from
+ elf_i386_check_relocs. We only want to check the new
+ transition which hasn't been checked before. */
+ check = new_to_type != to_type && from_type == to_type;
+ to_type = new_to_type;
+ }
- if (!_bfd_elf_create_dynamic_sections (dynobj, info))
- return FALSE;
+ break;
- htab = elf_i386_hash_table (info);
- if (htab == NULL)
- return FALSE;
+ case R_386_TLS_LDM:
+ if (bfd_link_executable (info))
+ to_type = R_386_TLS_LE_32;
+ break;
- /* Set the contents of the .interp section to the interpreter. */
- if (bfd_link_executable (info) && !info->nointerp)
- {
- asection *s = bfd_get_linker_section (dynobj, ".interp");
- if (s == NULL)
- abort ();
- s->size = sizeof ELF_DYNAMIC_INTERPRETER;
- s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
- htab->interp = s;
+ default:
+ return TRUE;
}
- if (get_elf_i386_backend_data (dynobj)->is_vxworks
- && !elf_vxworks_create_dynamic_sections (dynobj, info,
- &htab->srelplt2))
- return FALSE;
+ /* Return TRUE if there is no transition. */
+ if (from_type == to_type)
+ return TRUE;
- if (htab->elf.splt != NULL)
+ /* Check if the transition can be performed. */
+ if (check
+ && ! elf_i386_check_tls_transition (sec, contents,
+ symtab_hdr, sym_hashes,
+ from_type, rel, relend))
{
- if (htab->plt_got == NULL
- && !get_elf_i386_backend_data (dynobj)->is_vxworks
- && get_elf_i386_backend_data (dynobj) == &elf_i386_arch_bed)
- {
- /* Create the GOT procedure linkage table. */
- unsigned int plt_got_align;
- const struct elf_backend_data *bed;
-
- bed = get_elf_backend_data (dynobj);
- BFD_ASSERT (sizeof (elf_i386_got_plt_entry) == 8
- && (sizeof (elf_i386_got_plt_entry)
- == sizeof (elf_i386_pic_got_plt_entry)));
- plt_got_align = 3;
-
- htab->plt_got
- = bfd_make_section_anyway_with_flags (dynobj,
- ".plt.got",
- (bed->dynamic_sec_flags
- | SEC_ALLOC
- | SEC_CODE
- | SEC_LOAD
- | SEC_READONLY));
- if (htab->plt_got == NULL
- || !bfd_set_section_alignment (dynobj,
- htab->plt_got,
- plt_got_align))
- return FALSE;
- }
+ reloc_howto_type *from, *to;
+ const char *name;
+
+ from = elf_i386_rtype_to_howto (from_type);
+ to = elf_i386_rtype_to_howto (to_type);
- if (!info->no_ld_generated_unwind_info)
+ if (h)
+ name = h->root.root.string;
+ else
{
- flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
- | SEC_HAS_CONTENTS | SEC_IN_MEMORY
- | SEC_LINKER_CREATED);
+ struct elf_x86_link_hash_table *htab;
- if (htab->plt_eh_frame == NULL)
+ htab = elf_x86_hash_table (info, I386_ELF_DATA);
+ if (htab == NULL)
+ name = "*unknown*";
+ else
{
- htab->plt_eh_frame
- = 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,
- 2))
- return FALSE;
- }
+ Elf_Internal_Sym *isym;
- if (htab->plt_got_eh_frame == NULL
- && htab->plt_got != NULL)
- {
- htab->plt_got_eh_frame
- = bfd_make_section_anyway_with_flags (dynobj,
- ".eh_frame",
- flags);
- if (htab->plt_got_eh_frame == NULL
- || !bfd_set_section_alignment (dynobj,
- htab->plt_got_eh_frame,
- 2))
- return FALSE;
+ isym = bfd_sym_from_r_symndx (&htab->sym_cache,
+ abfd, r_symndx);
+ name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
}
}
+
+ _bfd_error_handler
+ /* xgettext:c-format */
+ (_("%pB: TLS transition from %s to %s against `%s'"
+ " at %#" PRIx64 " in section `%pA' failed"),
+ abfd, from->name, to->name, name,
+ (uint64_t) rel->r_offset, sec);
+ bfd_set_error (bfd_error_bad_value);
+ return FALSE;
}
+ *r_type = to_type;
return TRUE;
}
-/* Copy the extra info we tack onto an elf_link_hash_entry. */
+/* With the local symbol, foo, we convert
+ mov foo@GOT[(%reg1)], %reg2
+ to
+ lea foo[@GOTOFF(%reg1)], %reg2
+ and convert
+ call/jmp *foo@GOT[(%reg)]
+ to
+ nop call foo/jmp foo nop
+ When PIC is false, convert
+ test %reg1, foo@GOT[(%reg2)]
+ to
+ test $foo, %reg1
+ and convert
+ binop foo@GOT[(%reg1)], %reg2
+ to
+ binop $foo, %reg2
+ where binop is one of adc, add, and, cmp, or, sbb, sub, xor
+ instructions. */
-static void
-elf_i386_copy_indirect_symbol (struct bfd_link_info *info,
- struct elf_link_hash_entry *dir,
- struct elf_link_hash_entry *ind)
+static
+bfd_boolean
+elf_i386_convert_load_reloc (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
+ bfd_byte *contents,
+ unsigned int *r_type_p,
+ Elf_Internal_Rela *irel,
+ struct elf_link_hash_entry *h,
+ bfd_boolean *converted,
+ struct bfd_link_info *link_info)
{
- struct elf_i386_link_hash_entry *edir, *eind;
+ struct elf_x86_link_hash_table *htab;
+ unsigned int opcode;
+ unsigned int modrm;
+ bfd_boolean baseless;
+ Elf_Internal_Sym *isym;
+ unsigned int addend;
+ unsigned int nop;
+ bfd_vma nop_offset;
+ bfd_boolean is_pic;
+ bfd_boolean to_reloc_32;
+ unsigned int r_type;
+ unsigned int r_symndx;
+ bfd_vma roff = irel->r_offset;
+ bfd_boolean local_ref;
+ struct elf_x86_link_hash_entry *eh;
- edir = (struct elf_i386_link_hash_entry *) dir;
- eind = (struct elf_i386_link_hash_entry *) ind;
+ if (roff < 2)
+ return TRUE;
- if (eind->dyn_relocs != NULL)
- {
- if (edir->dyn_relocs != NULL)
- {
- struct elf_dyn_relocs **pp;
- struct elf_dyn_relocs *p;
+ /* Addend for R_386_GOT32X relocations must be 0. */
+ addend = bfd_get_32 (abfd, contents + roff);
+ if (addend != 0)
+ return TRUE;
- /* Add reloc counts against the indirect sym to the direct sym
- list. Merge any entries against the same section. */
- for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
- {
- struct elf_dyn_relocs *q;
+ htab = elf_x86_hash_table (link_info, I386_ELF_DATA);
+ is_pic = bfd_link_pic (link_info);
- for (q = edir->dyn_relocs; q != NULL; q = q->next)
- if (q->sec == p->sec)
- {
- q->pc_count += p->pc_count;
- q->count += p->count;
- *pp = p->next;
- break;
- }
- if (q == NULL)
- pp = &p->next;
- }
- *pp = edir->dyn_relocs;
- }
+ r_type = *r_type_p;
+ r_symndx = ELF32_R_SYM (irel->r_info);
- edir->dyn_relocs = eind->dyn_relocs;
- eind->dyn_relocs = NULL;
- }
+ modrm = bfd_get_8 (abfd, contents + roff - 1);
+ baseless = (modrm & 0xc7) == 0x5;
- if (ind->root.type == bfd_link_hash_indirect
- && dir->got.refcount <= 0)
+ if (baseless && is_pic)
{
- edir->tls_type = eind->tls_type;
- eind->tls_type = GOT_UNKNOWN;
- }
-
- /* Copy gotoff_ref so that elf_i386_adjust_dynamic_symbol will
- generate a R_386_COPY reloc. */
- edir->gotoff_ref |= eind->gotoff_ref;
-
- edir->has_got_reloc |= eind->has_got_reloc;
- edir->has_non_got_reloc |= eind->has_non_got_reloc;
+ /* For PIC, disallow R_386_GOT32X without a base register
+ since we don't know what the GOT base is. */
+ const char *name;
- if (ELIMINATE_COPY_RELOCS
- && ind->root.type != bfd_link_hash_indirect
- && dir->dynamic_adjusted)
- {
- /* If called to transfer flags for a weakdef during processing
- of elf_adjust_dynamic_symbol, don't copy non_got_ref.
- We clear it ourselves for ELIMINATE_COPY_RELOCS. */
- if (dir->versioned != versioned_hidden)
- dir->ref_dynamic |= ind->ref_dynamic;
- dir->ref_regular |= ind->ref_regular;
- dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
- dir->needs_plt |= ind->needs_plt;
- dir->pointer_equality_needed |= ind->pointer_equality_needed;
- }
- else
- {
- if (eind->func_pointer_refcount > 0)
+ if (h == NULL)
{
- edir->func_pointer_refcount += eind->func_pointer_refcount;
- eind->func_pointer_refcount = 0;
+ isym = bfd_sym_from_r_symndx (&htab->sym_cache, abfd,
+ r_symndx);
+ name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
}
+ else
+ name = h->root.root.string;
- _bfd_elf_link_hash_copy_indirect (info, dir, ind);
- }
-}
-
-/* Return TRUE if the TLS access code sequence support transition
- from R_TYPE. */
-
-static bfd_boolean
-elf_i386_check_tls_transition (asection *sec,
- bfd_byte *contents,
- Elf_Internal_Shdr *symtab_hdr,
- struct elf_link_hash_entry **sym_hashes,
- unsigned int r_type,
- const Elf_Internal_Rela *rel,
- const Elf_Internal_Rela *relend)
-{
- unsigned int val, type, reg;
- unsigned long r_symndx;
- struct elf_link_hash_entry *h;
- bfd_vma offset;
- bfd_byte *call;
- bfd_boolean indirect_call, tls_get_addr;
-
- offset = rel->r_offset;
- switch (r_type)
- {
- case R_386_TLS_GD:
- case R_386_TLS_LDM:
- if (offset < 2 || (rel + 1) >= relend)
- return FALSE;
-
- indirect_call = FALSE;
- call = contents + offset + 4;
- val = *(call - 5);
- type = *(call - 6);
- if (r_type == R_386_TLS_GD)
- {
- /* Check transition from GD access model. Only
- leal foo@tlsgd(,%ebx,1), %eax
- call ___tls_get_addr@PLT
- or
- leal foo@tlsgd(%ebx) %eax
- call ___tls_get_addr@PLT
- nop
- or
- leal foo@tlsgd(%reg), %eax
- call *___tls_get_addr@GOT(%reg)
- which may be converted to
- addr32 call ___tls_get_addr
- can transit to different access model. */
- if ((offset + 10) > sec->size
- || (type != 0x8d && type != 0x04))
- return FALSE;
-
- if (type == 0x04)
- {
- /* leal foo@tlsgd(,%ebx,1), %eax
- call ___tls_get_addr@PLT */
- if (offset < 3)
- return FALSE;
-
- if (*(call - 7) != 0x8d
- || val != 0x1d
- || call[0] != 0xe8)
- return FALSE;
- }
- else
- {
- /* This must be
- leal foo@tlsgd(%ebx), %eax
- call ___tls_get_addr@PLT
- nop
- or
- leal foo@tlsgd(%reg), %eax
- call *___tls_get_addr@GOT(%reg)
- which may be converted to
- addr32 call ___tls_get_addr
-
- %eax can't be used as the GOT base register since it
- is used to pass parameter to ___tls_get_addr. */
- reg = val & 7;
- if ((val & 0xf8) != 0x80 || reg == 4 || reg == 0)
- return FALSE;
-
- indirect_call = call[0] == 0xff;
- if (!(reg == 3 && call[0] == 0xe8 && call[5] == 0x90)
- && !(call[0] == 0x67 && call[1] == 0xe8)
- && !(indirect_call
- && (call[1] & 0xf8) == 0x90
- && (call[1] & 0x7) == reg))
- return FALSE;
- }
- }
- else
- {
- /* Check transition from LD access model. Only
- leal foo@tlsldm(%ebx), %eax
- call ___tls_get_addr@PLT
- or
- leal foo@tlsldm(%reg), %eax
- call *___tls_get_addr@GOT(%reg)
- which may be converted to
- addr32 call ___tls_get_addr
- can transit to different access model. */
- if (type != 0x8d || (offset + 9) > sec->size)
- return FALSE;
-
- /* %eax can't be used as the GOT base register since it is
- used to pass parameter to ___tls_get_addr. */
- reg = val & 7;
- if ((val & 0xf8) != 0x80 || reg == 4 || reg == 0)
- return FALSE;
-
- indirect_call = call[0] == 0xff;
- if (!(reg == 3 && call[0] == 0xe8)
- && !(call[0] == 0x67 && call[1] == 0xe8)
- && !(indirect_call
- && (call[1] & 0xf8) == 0x90
- && (call[1] & 0x7) == reg))
- return FALSE;
- }
-
- r_symndx = ELF32_R_SYM (rel[1].r_info);
- if (r_symndx < symtab_hdr->sh_info)
- return FALSE;
-
- tls_get_addr = FALSE;
- h = sym_hashes[r_symndx - symtab_hdr->sh_info];
- if (h != NULL && h->root.root.string != NULL)
- {
- struct elf_i386_link_hash_entry *eh
- = (struct elf_i386_link_hash_entry *) h;
- tls_get_addr = eh->tls_get_addr == 1;
- if (eh->tls_get_addr > 1)
- {
- /* Use strncmp to check ___tls_get_addr since
- ___tls_get_addr may be versioned. */
- if (strncmp (h->root.root.string, "___tls_get_addr", 15)
- == 0)
- {
- eh->tls_get_addr = 1;
- tls_get_addr = TRUE;
- }
- else
- eh->tls_get_addr = 0;
- }
- }
-
- if (!tls_get_addr)
- return FALSE;
- else if (indirect_call)
- return (ELF32_R_TYPE (rel[1].r_info) == R_386_GOT32X);
- else
- return (ELF32_R_TYPE (rel[1].r_info) == R_386_PC32
- || ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32);
-
- case R_386_TLS_IE:
- /* Check transition from IE access model:
- movl foo@indntpoff(%rip), %eax
- movl foo@indntpoff(%rip), %reg
- addl foo@indntpoff(%rip), %reg
- */
-
- if (offset < 1 || (offset + 4) > sec->size)
- return FALSE;
-
- /* Check "movl foo@tpoff(%rip), %eax" first. */
- val = bfd_get_8 (abfd, contents + offset - 1);
- if (val == 0xa1)
- return TRUE;
-
- if (offset < 2)
- return FALSE;
-
- /* Check movl|addl foo@tpoff(%rip), %reg. */
- type = bfd_get_8 (abfd, contents + offset - 2);
- return ((type == 0x8b || type == 0x03)
- && (val & 0xc7) == 0x05);
-
- case R_386_TLS_GOTIE:
- case R_386_TLS_IE_32:
- /* Check transition from {IE_32,GOTIE} access model:
- subl foo@{tpoff,gontoff}(%reg1), %reg2
- movl foo@{tpoff,gontoff}(%reg1), %reg2
- addl foo@{tpoff,gontoff}(%reg1), %reg2
- */
-
- if (offset < 2 || (offset + 4) > sec->size)
- return FALSE;
-
- val = bfd_get_8 (abfd, contents + offset - 1);
- if ((val & 0xc0) != 0x80 || (val & 7) == 4)
- return FALSE;
-
- type = bfd_get_8 (abfd, contents + offset - 2);
- return type == 0x8b || type == 0x2b || type == 0x03;
-
- case R_386_TLS_GOTDESC:
- /* Check transition from GDesc access model:
- leal x@tlsdesc(%ebx), %eax
-
- Make sure it's a leal adding ebx to a 32-bit offset
- into any register, although it's probably almost always
- going to be eax. */
-
- if (offset < 2 || (offset + 4) > sec->size)
- return FALSE;
-
- if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
- return FALSE;
-
- val = bfd_get_8 (abfd, contents + offset - 1);
- return (val & 0xc7) == 0x83;
-
- case R_386_TLS_DESC_CALL:
- /* Check transition from GDesc access model:
- call *x@tlsdesc(%eax)
- */
- if (offset + 2 <= sec->size)
- {
- /* Make sure that it's a call *x@tlsdesc(%eax). */
- call = contents + offset;
- return call[0] == 0xff && call[1] == 0x10;
- }
-
- return FALSE;
-
- default:
- abort ();
- }
-}
-
-/* Return TRUE if the TLS access transition is OK or no transition
- will be performed. Update R_TYPE if there is a transition. */
-
-static bfd_boolean
-elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd,
- asection *sec, bfd_byte *contents,
- Elf_Internal_Shdr *symtab_hdr,
- struct elf_link_hash_entry **sym_hashes,
- unsigned int *r_type, int tls_type,
- const Elf_Internal_Rela *rel,
- const Elf_Internal_Rela *relend,
- struct elf_link_hash_entry *h,
- unsigned long r_symndx,
- bfd_boolean from_relocate_section)
-{
- unsigned int from_type = *r_type;
- unsigned int to_type = from_type;
- bfd_boolean check = TRUE;
-
- /* Skip TLS transition for functions. */
- if (h != NULL
- && (h->type == STT_FUNC
- || h->type == STT_GNU_IFUNC))
- return TRUE;
-
- switch (from_type)
- {
- case R_386_TLS_GD:
- case R_386_TLS_GOTDESC:
- case R_386_TLS_DESC_CALL:
- case R_386_TLS_IE_32:
- case R_386_TLS_IE:
- case R_386_TLS_GOTIE:
- if (bfd_link_executable (info))
- {
- if (h == NULL)
- to_type = R_386_TLS_LE_32;
- else if (from_type != R_386_TLS_IE
- && from_type != R_386_TLS_GOTIE)
- to_type = R_386_TLS_IE_32;
- }
-
- /* When we are called from elf_i386_relocate_section, there may
- be additional transitions based on TLS_TYPE. */
- if (from_relocate_section)
- {
- unsigned int new_to_type = to_type;
-
- if (bfd_link_executable (info)
- && h != NULL
- && h->dynindx == -1
- && (tls_type & GOT_TLS_IE))
- new_to_type = R_386_TLS_LE_32;
-
- if (to_type == R_386_TLS_GD
- || to_type == R_386_TLS_GOTDESC
- || to_type == R_386_TLS_DESC_CALL)
- {
- if (tls_type == GOT_TLS_IE_POS)
- new_to_type = R_386_TLS_GOTIE;
- else if (tls_type & GOT_TLS_IE)
- new_to_type = R_386_TLS_IE_32;
- }
-
- /* We checked the transition before when we were called from
- elf_i386_check_relocs. We only want to check the new
- transition which hasn't been checked before. */
- check = new_to_type != to_type && from_type == to_type;
- to_type = new_to_type;
- }
-
- break;
-
- case R_386_TLS_LDM:
- if (bfd_link_executable (info))
- to_type = R_386_TLS_LE_32;
- break;
-
- default:
- return TRUE;
- }
-
- /* Return TRUE if there is no transition. */
- if (from_type == to_type)
- return TRUE;
-
- /* Check if the transition can be performed. */
- if (check
- && ! elf_i386_check_tls_transition (sec, contents,
- symtab_hdr, sym_hashes,
- from_type, rel, relend))
- {
- reloc_howto_type *from, *to;
- const char *name;
-
- from = elf_i386_rtype_to_howto (abfd, from_type);
- to = elf_i386_rtype_to_howto (abfd, to_type);
-
- if (h)
- name = h->root.root.string;
- else
- {
- struct elf_i386_link_hash_table *htab;
-
- htab = elf_i386_hash_table (info);
- if (htab == NULL)
- name = "*unknown*";
- else
- {
- Elf_Internal_Sym *isym;
-
- isym = bfd_sym_from_r_symndx (&htab->sym_cache,
- abfd, r_symndx);
- name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
- }
- }
-
- _bfd_error_handler
- /* xgettext:c-format */
- (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
- "in section `%A' failed"),
- abfd, from->name, to->name, name,
- (unsigned long) rel->r_offset, sec);
- bfd_set_error (bfd_error_bad_value);
- return FALSE;
- }
-
- *r_type = to_type;
- return TRUE;
-}
-
-/* With the local symbol, foo, we convert
- mov foo@GOT[(%reg1)], %reg2
- to
- lea foo[@GOTOFF(%reg1)], %reg2
- and convert
- call/jmp *foo@GOT[(%reg)]
- to
- nop call foo/jmp foo nop
- When PIC is false, convert
- test %reg1, foo@GOT[(%reg2)]
- to
- test $foo, %reg1
- and convert
- binop foo@GOT[(%reg1)], %reg2
- to
- binop $foo, %reg2
- where binop is one of adc, add, and, cmp, or, sbb, sub, xor
- instructions. */
-
-static
-bfd_boolean
-elf_i386_convert_load_reloc (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
- bfd_byte *contents,
- Elf_Internal_Rela *irel,
- struct elf_link_hash_entry *h,
- bfd_boolean *converted,
- struct bfd_link_info *link_info)
-{
- struct elf_i386_link_hash_table *htab;
- unsigned int opcode;
- unsigned int modrm;
- bfd_boolean baseless;
- Elf_Internal_Sym *isym;
- unsigned int addend;
- unsigned int nop;
- bfd_vma nop_offset;
- bfd_boolean is_pic;
- bfd_boolean to_reloc_32;
- unsigned int r_type;
- unsigned int r_symndx;
- bfd_vma roff = irel->r_offset;
-
- if (roff < 2)
- return TRUE;
-
- /* Addend for R_386_GOT32X relocations must be 0. */
- addend = bfd_get_32 (abfd, contents + roff);
- if (addend != 0)
- return TRUE;
-
- htab = elf_i386_hash_table (link_info);
- is_pic = bfd_link_pic (link_info);
-
- r_type = ELF32_R_TYPE (irel->r_info);
- r_symndx = ELF32_R_SYM (irel->r_info);
-
- modrm = bfd_get_8 (abfd, contents + roff - 1);
- baseless = (modrm & 0xc7) == 0x5;
-
- if (baseless && is_pic)
- {
- /* For PIC, disallow R_386_GOT32X without a base register
- since we don't know what the GOT base is. */
- const char *name;
-
- if (h == NULL)
- {
- isym = bfd_sym_from_r_symndx (&htab->sym_cache, abfd,
- r_symndx);
- name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
- }
- else
- name = h->root.root.string;
-
- _bfd_error_handler
- /* xgettext:c-format */
- (_("%B: direct GOT relocation R_386_GOT32X against `%s' without base"
- " register can not be used when making a shared object"),
- abfd, name);
- return FALSE;
- }
-
- opcode = bfd_get_8 (abfd, contents + roff - 2);
-
- /* Convert to R_386_32 if PIC is false or there is no base
- register. */
- to_reloc_32 = !is_pic || baseless;
-
- /* Try to convert R_386_GOT32X. Get the symbol referred to by the
- reloc. */
- if (h == NULL)
- {
- if (opcode == 0x0ff)
- /* Convert "call/jmp *foo@GOT[(%reg)]". */
- goto convert_branch;
- else
- /* Convert "mov foo@GOT[(%reg1)], %reg2",
- "test %reg1, foo@GOT(%reg2)" and
- "binop foo@GOT[(%reg1)], %reg2". */
- goto convert_load;
- }
-
- /* Undefined weak symbol is only bound locally in executable
- and its reference is resolved as 0. */
- if (UNDEFINED_WEAK_RESOLVED_TO_ZERO (link_info, TRUE,
- elf_i386_hash_entry (h)))
- {
- if (opcode == 0xff)
- {
- /* No direct branch to 0 for PIC. */
- if (is_pic)
- return TRUE;
- else
- goto convert_branch;
- }
- else
- {
- /* We can convert load of address 0 to R_386_32. */
- to_reloc_32 = TRUE;
- goto convert_load;
- }
- }
-
- if (opcode == 0xff)
- {
- /* We have "call/jmp *foo@GOT[(%reg)]". */
- if ((h->root.type == bfd_link_hash_defined
- || h->root.type == bfd_link_hash_defweak)
- && SYMBOL_REFERENCES_LOCAL (link_info, h))
- {
- /* The function is locally defined. */
-convert_branch:
- /* Convert R_386_GOT32X to R_386_PC32. */
- if (modrm == 0x15 || (modrm & 0xf8) == 0x90)
- {
- struct elf_i386_link_hash_entry *eh
- = (struct elf_i386_link_hash_entry *) h;
-
- /* Convert to "nop call foo". ADDR_PREFIX_OPCODE
- is a nop prefix. */
- modrm = 0xe8;
- /* To support TLS optimization, always use addr32 prefix
- for "call *___tls_get_addr@GOT(%reg)". */
- if (eh && eh->tls_get_addr == 1)
- {
- nop = 0x67;
- nop_offset = irel->r_offset - 2;
- }
- else
- {
- nop = link_info->call_nop_byte;
- if (link_info->call_nop_as_suffix)
- {
- nop_offset = roff + 3;
- irel->r_offset -= 1;
- }
- else
- nop_offset = roff - 2;
- }
- }
- else
- {
- /* Convert to "jmp foo nop". */
- modrm = 0xe9;
- nop = NOP_OPCODE;
- nop_offset = roff + 3;
- irel->r_offset -= 1;
- }
-
- bfd_put_8 (abfd, nop, contents + nop_offset);
- bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1);
- /* When converting to PC-relative relocation, we
- need to adjust addend by -4. */
- bfd_put_32 (abfd, -4, contents + irel->r_offset);
- irel->r_info = ELF32_R_INFO (r_symndx, R_386_PC32);
-
- *converted = TRUE;
- }
- }
- else
- {
- /* We have "mov foo@GOT[(%re1g)], %reg2",
- "test %reg1, foo@GOT(%reg2)" and
- "binop foo@GOT[(%reg1)], %reg2".
-
- Avoid optimizing _DYNAMIC since ld.so may use its
- link-time address. */
- if (h == htab->elf.hdynamic)
- return TRUE;
-
- /* def_regular is set by an assignment in a linker script in
- bfd_elf_record_link_assignment. */
- if ((h->def_regular
- || h->root.type == bfd_link_hash_defined
- || h->root.type == bfd_link_hash_defweak)
- && SYMBOL_REFERENCES_LOCAL (link_info, h))
- {
-convert_load:
- if (opcode == 0x8b)
- {
- if (to_reloc_32)
- {
- /* Convert "mov foo@GOT[(%reg1)], %reg2" to
- "mov $foo, %reg2" with R_386_32. */
- r_type = R_386_32;
- modrm = 0xc0 | (modrm & 0x38) >> 3;
- bfd_put_8 (abfd, modrm, contents + roff - 1);
- opcode = 0xc7;
- }
- else
- {
- /* Convert "mov foo@GOT(%reg1), %reg2" to
- "lea foo@GOTOFF(%reg1), %reg2". */
- r_type = R_386_GOTOFF;
- opcode = 0x8d;
- }
- }
- else
- {
- /* Only R_386_32 is supported. */
- if (!to_reloc_32)
- return TRUE;
-
- if (opcode == 0x85)
- {
- /* Convert "test %reg1, foo@GOT(%reg2)" to
- "test $foo, %reg1". */
- modrm = 0xc0 | (modrm & 0x38) >> 3;
- opcode = 0xf7;
- }
- else
- {
- /* Convert "binop foo@GOT(%reg1), %reg2" to
- "binop $foo, %reg2". */
- modrm = (0xc0
- | (modrm & 0x38) >> 3
- | (opcode & 0x3c));
- opcode = 0x81;
- }
- bfd_put_8 (abfd, modrm, contents + roff - 1);
- r_type = R_386_32;
- }
-
- bfd_put_8 (abfd, opcode, contents + roff - 2);
- irel->r_info = ELF32_R_INFO (r_symndx, r_type);
-
- *converted = TRUE;
- }
- }
-
- return TRUE;
-}
-
-/* Rename some of the generic section flags to better document how they
- are used here. */
-#define need_convert_load sec_flg0
-#define check_relocs_failed sec_flg1
-
-/* Look through the relocs for a section during the first phase, and
- calculate needed space in the global offset table, procedure linkage
- table, and dynamic reloc sections. */
-
-static bfd_boolean
-elf_i386_check_relocs (bfd *abfd,
- struct bfd_link_info *info,
- asection *sec,
- const Elf_Internal_Rela *relocs)
-{
- struct elf_i386_link_hash_table *htab;
- Elf_Internal_Shdr *symtab_hdr;
- struct elf_link_hash_entry **sym_hashes;
- const Elf_Internal_Rela *rel;
- const Elf_Internal_Rela *rel_end;
- asection *sreloc;
- bfd_byte *contents;
-
- if (bfd_link_relocatable (info))
- return TRUE;
-
- /* Don't do anything special with non-loaded, non-alloced sections.
- In particular, any relocs in such sections should not affect GOT
- and PLT reference counting (ie. we don't allow them to create GOT
- or PLT entries), there's no possibility or desire to optimize TLS
- relocs, and there's not much point in propagating relocs to shared
- libs that the dynamic linker won't relocate. */
- if ((sec->flags & SEC_ALLOC) == 0)
- return TRUE;
-
- BFD_ASSERT (is_i386_elf (abfd));
-
- htab = elf_i386_hash_table (info);
- if (htab == NULL)
- {
- sec->check_relocs_failed = 1;
- return FALSE;
- }
-
- /* 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))
- {
- sec->check_relocs_failed = 1;
- return FALSE;
- }
-
- symtab_hdr = &elf_symtab_hdr (abfd);
- sym_hashes = elf_sym_hashes (abfd);
-
- sreloc = NULL;
-
- rel_end = relocs + sec->reloc_count;
- for (rel = relocs; rel < rel_end; rel++)
- {
- unsigned int r_type;
- unsigned long r_symndx;
- struct elf_link_hash_entry *h;
- struct elf_i386_link_hash_entry *eh;
- Elf_Internal_Sym *isym;
- const char *name;
- bfd_boolean size_reloc;
-
- r_symndx = ELF32_R_SYM (rel->r_info);
- r_type = ELF32_R_TYPE (rel->r_info);
-
- if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
- {
- /* xgettext:c-format */
- _bfd_error_handler (_("%B: bad symbol index: %d"),
- abfd, r_symndx);
- goto error_return;
- }
-
- if (r_symndx < symtab_hdr->sh_info)
- {
- /* A local symbol. */
- isym = bfd_sym_from_r_symndx (&htab->sym_cache,
- abfd, r_symndx);
- if (isym == NULL)
- goto error_return;
-
- /* Check relocation against local STT_GNU_IFUNC symbol. */
- if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
- {
- h = elf_i386_get_local_sym_hash (htab, abfd, rel, TRUE);
- if (h == NULL)
- goto error_return;
-
- /* Fake a STT_GNU_IFUNC symbol. */
- h->type = STT_GNU_IFUNC;
- h->def_regular = 1;
- h->ref_regular = 1;
- h->forced_local = 1;
- h->root.type = bfd_link_hash_defined;
- }
- else
- h = NULL;
- }
- else
- {
- isym = NULL;
- 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;
- }
-
- eh = (struct elf_i386_link_hash_entry *) h;
- if (h != NULL)
- {
- switch (r_type)
- {
- default:
- break;
-
- case R_386_GOTOFF:
- eh->gotoff_ref = 1;
- /* Fall through. */
- case R_386_32:
- case R_386_PC32:
- case R_386_PLT32:
- case R_386_GOT32:
- case R_386_GOT32X:
- if (htab->elf.dynobj == NULL)
- htab->elf.dynobj = abfd;
- /* Create the ifunc sections for static executables. */
- if (h->type == STT_GNU_IFUNC
- && !_bfd_elf_create_ifunc_sections (htab->elf.dynobj,
- info))
- goto error_return;
- break;
- }
-
- /* It is referenced by a non-shared object. */
- h->ref_regular = 1;
- h->root.non_ir_ref = 1;
-
- if (h->type == STT_GNU_IFUNC)
- elf_tdata (info->output_bfd)->has_gnu_symbols
- |= elf_gnu_symbol_ifunc;
- }
-
- if (! elf_i386_tls_transition (info, abfd, sec, contents,
- symtab_hdr, sym_hashes,
- &r_type, GOT_UNKNOWN,
- rel, rel_end, h, r_symndx, FALSE))
- goto error_return;
-
- switch (r_type)
- {
- case R_386_TLS_LDM:
- htab->tls_ldm_got.refcount += 1;
- goto create_got;
-
- 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;
-
- eh->has_got_reloc = 1;
- h->needs_plt = 1;
- h->plt.refcount += 1;
- break;
-
- case R_386_SIZE32:
- size_reloc = TRUE;
- goto do_size;
-
- case R_386_TLS_IE_32:
- case R_386_TLS_IE:
- case R_386_TLS_GOTIE:
- if (!bfd_link_executable (info))
- info->flags |= DF_STATIC_TLS;
- /* Fall through */
-
- case R_386_GOT32:
- case R_386_GOT32X:
- case R_386_TLS_GD:
- case R_386_TLS_GOTDESC:
- case R_386_TLS_DESC_CALL:
- /* This symbol requires a global offset table entry. */
- {
- int tls_type, old_tls_type;
-
- switch (r_type)
- {
- default:
- case R_386_GOT32:
- case R_386_GOT32X:
- tls_type = GOT_NORMAL;
- break;
- case R_386_TLS_GD: tls_type = GOT_TLS_GD; break;
- case R_386_TLS_GOTDESC:
- case R_386_TLS_DESC_CALL:
- tls_type = GOT_TLS_GDESC; break;
- case R_386_TLS_IE_32:
- if (ELF32_R_TYPE (rel->r_info) == r_type)
- tls_type = GOT_TLS_IE_NEG;
- else
- /* If this is a GD->IE transition, we may use either of
- R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
- tls_type = GOT_TLS_IE;
- break;
- case R_386_TLS_IE:
- case R_386_TLS_GOTIE:
- tls_type = GOT_TLS_IE_POS; break;
- }
-
- if (h != NULL)
- {
- h->got.refcount += 1;
- old_tls_type = elf_i386_hash_entry(h)->tls_type;
- }
- else
- {
- bfd_signed_vma *local_got_refcounts;
-
- /* This is a global offset table entry for a local symbol. */
- local_got_refcounts = elf_local_got_refcounts (abfd);
- if (local_got_refcounts == NULL)
- {
- bfd_size_type size;
-
- size = symtab_hdr->sh_info;
- size *= (sizeof (bfd_signed_vma)
- + sizeof (bfd_vma) + sizeof(char));
- local_got_refcounts = (bfd_signed_vma *)
- bfd_zalloc (abfd, size);
- if (local_got_refcounts == NULL)
- goto error_return;
- elf_local_got_refcounts (abfd) = local_got_refcounts;
- elf_i386_local_tlsdesc_gotent (abfd)
- = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
- elf_i386_local_got_tls_type (abfd)
- = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
- }
- local_got_refcounts[r_symndx] += 1;
- old_tls_type = elf_i386_local_got_tls_type (abfd) [r_symndx];
- }
-
- if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE))
- tls_type |= old_tls_type;
- /* If a TLS symbol is accessed using IE at least once,
- there is no point to use dynamic model for it. */
- else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
- && (! GOT_TLS_GD_ANY_P (old_tls_type)
- || (tls_type & GOT_TLS_IE) == 0))
- {
- if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type))
- tls_type = old_tls_type;
- else if (GOT_TLS_GD_ANY_P (old_tls_type)
- && GOT_TLS_GD_ANY_P (tls_type))
- tls_type |= old_tls_type;
- else
- {
- if (h)
- name = h->root.root.string;
- else
- name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
- NULL);
- _bfd_error_handler
- /* xgettext:c-format */
- (_("%B: `%s' accessed both as normal and "
- "thread local symbol"),
- abfd, name);
- bfd_set_error (bfd_error_bad_value);
- goto error_return;
- }
- }
-
- if (old_tls_type != tls_type)
- {
- if (h != NULL)
- elf_i386_hash_entry (h)->tls_type = tls_type;
- else
- elf_i386_local_got_tls_type (abfd) [r_symndx] = tls_type;
- }
- }
- /* Fall through */
-
- case R_386_GOTOFF:
- case R_386_GOTPC:
- create_got:
- if (htab->elf.sgot == NULL)
- {
- if (htab->elf.dynobj == NULL)
- htab->elf.dynobj = abfd;
- if (!_bfd_elf_create_got_section (htab->elf.dynobj, info))
- goto error_return;
- }
- if (r_type != R_386_TLS_IE)
- {
- if (eh != NULL)
- eh->has_got_reloc = 1;
- break;
- }
- /* Fall through */
-
- case R_386_TLS_LE_32:
- case R_386_TLS_LE:
- if (eh != NULL)
- eh->has_got_reloc = 1;
- if (bfd_link_executable (info))
- break;
- info->flags |= DF_STATIC_TLS;
- goto do_relocation;
-
- case R_386_32:
- case R_386_PC32:
- if (eh != NULL && (sec->flags & SEC_CODE) != 0)
- eh->has_non_got_reloc = 1;
-do_relocation:
- /* We are called after all symbols have been resolved. Only
- relocation against STT_GNU_IFUNC symbol must go through
- PLT. */
- if (h != NULL
- && (bfd_link_executable (info)
- || h->type == STT_GNU_IFUNC))
- {
- /* If this reloc is in a read-only section, we might
- need a copy reloc. We can't check reliably at this
- stage whether the section is read-only, as input
- sections have not yet been mapped to output sections.
- Tentatively set the flag for now, and correct in
- adjust_dynamic_symbol. */
- h->non_got_ref = 1;
-
- /* We may need a .plt entry if the symbol is a function
- defined in a shared lib or is a STT_GNU_IFUNC function
- referenced from the code or read-only section. */
- if (!h->def_regular
- || (sec->flags & (SEC_CODE | SEC_READONLY)) != 0)
- h->plt.refcount += 1;
-
- if (r_type == R_386_PC32)
- {
- /* Since something like ".long foo - ." may be used
- as pointer, make sure that PLT is used if foo is
- a function defined in a shared library. */
- if ((sec->flags & SEC_CODE) == 0)
- h->pointer_equality_needed = 1;
- else if (h->type == STT_GNU_IFUNC
- && bfd_link_pic (info))
- {
- if (isym == NULL)
- name = h->root.root.string;
- else
- name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
- NULL);
- _bfd_error_handler
- /* xgettext:c-format */
- (_("%B: unsupported non-PIC call to IFUNC `%s'"),
- abfd, name);
- bfd_set_error (bfd_error_bad_value);
- goto error_return;
- }
- }
- else
- {
- h->pointer_equality_needed = 1;
- /* R_386_32 can be resolved at run-time. */
- if (r_type == R_386_32
- && (sec->flags & SEC_READONLY) == 0)
- eh->func_pointer_refcount += 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
- 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.
-
- Generate dynamic pointer relocation against STT_GNU_IFUNC
- symbol in the non-code section. */
- if ((bfd_link_pic (info)
- && (r_type != R_386_PC32
- || (h != NULL
- && (! (bfd_link_pie (info)
- || SYMBOLIC_BIND (info, h))
- || h->root.type == bfd_link_hash_defweak
- || !h->def_regular))))
- || (h != NULL
- && h->type == STT_GNU_IFUNC
- && r_type == R_386_32
- && (sec->flags & SEC_CODE) == 0)
- || (ELIMINATE_COPY_RELOCS
- && !bfd_link_pic (info)
- && h != NULL
- && (h->root.type == bfd_link_hash_defweak
- || !h->def_regular)))
- {
- struct elf_dyn_relocs *p;
- struct elf_dyn_relocs **head;
-
- /* We must copy these reloc types into the output file.
- Create a reloc section in dynobj and make room for
- this reloc. */
- if (sreloc == NULL)
- {
- if (htab->elf.dynobj == NULL)
- htab->elf.dynobj = abfd;
-
- sreloc = _bfd_elf_make_dynamic_reloc_section
- (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ FALSE);
-
- if (sreloc == NULL)
- goto error_return;
- }
-
- /* If this is a global symbol, we count the number of
- relocations we need for this symbol. */
- if (h != NULL)
- {
- head = &eh->dyn_relocs;
- }
- else
- {
- /* Track dynamic relocs needed for local syms too.
- We really need local syms available to do this
- easily. Oh well. */
- void **vpp;
- asection *s;
-
- isym = bfd_sym_from_r_symndx (&htab->sym_cache,
- abfd, r_symndx);
- if (isym == NULL)
- goto error_return;
-
- s = bfd_section_from_elf_index (abfd, isym->st_shndx);
- if (s == NULL)
- s = sec;
-
- vpp = &elf_section_data (s)->local_dynrel;
- head = (struct elf_dyn_relocs **)vpp;
- }
-
- p = *head;
- if (p == NULL || p->sec != sec)
- {
- bfd_size_type amt = sizeof *p;
- p = (struct elf_dyn_relocs *) bfd_alloc (htab->elf.dynobj,
- amt);
- if (p == NULL)
- goto error_return;
- p->next = *head;
- *head = p;
- p->sec = sec;
- p->count = 0;
- p->pc_count = 0;
- }
-
- p->count += 1;
- /* Count size relocation as PC-relative relocation. */
- if (r_type == R_386_PC32 || size_reloc)
- p->pc_count += 1;
- }
- break;
-
- /* This relocation describes the C++ object vtable hierarchy.
- Reconstruct it for later use during GC. */
- case R_386_GNU_VTINHERIT:
- if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
- goto error_return;
- break;
-
- /* This relocation describes which C++ vtable entries are actually
- used. Record for later use during GC. */
- case R_386_GNU_VTENTRY:
- BFD_ASSERT (h != NULL);
- if (h != NULL
- && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
- goto error_return;
- break;
-
- default:
- break;
- }
-
- if (r_type == R_386_GOT32X
- && (h == NULL || h->type != STT_GNU_IFUNC))
- sec->need_convert_load = 1;
- }
-
- if (elf_section_data (sec)->this_hdr.contents != contents)
- {
- if (!info->keep_memory)
- free (contents);
- else
- {
- /* Cache the section contents for elf_link_input_bfd. */
- elf_section_data (sec)->this_hdr.contents = contents;
- }
- }
-
- return TRUE;
-
-error_return:
- if (elf_section_data (sec)->this_hdr.contents != contents)
- free (contents);
- sec->check_relocs_failed = 1;
- return FALSE;
-}
-
-/* Return the section that should be marked against GC for a given
- relocation. */
-
-static asection *
-elf_i386_gc_mark_hook (asection *sec,
- struct bfd_link_info *info,
- 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:
- return NULL;
- }
-
- return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
-}
-
-/* Remove undefined weak symbol from the dynamic symbol table if it
- is resolved to 0. */
-
-static bfd_boolean
-elf_i386_fixup_symbol (struct bfd_link_info *info,
- struct elf_link_hash_entry *h)
-{
- if (h->dynindx != -1
- && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
- elf_i386_hash_entry (h)->has_got_reloc,
- elf_i386_hash_entry (h)))
- {
- h->dynindx = -1;
- _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
- h->dynstr_index);
- }
- 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 bfd_boolean
-elf_i386_adjust_dynamic_symbol (struct bfd_link_info *info,
- struct elf_link_hash_entry *h)
-{
- struct elf_i386_link_hash_table *htab;
- asection *s, *srel;
- struct elf_i386_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_i386_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->non_got_ref = 1;
- if (pc_count)
- {
- /* Increment PLT reference count only for PC-relative
- references. */
- h->needs_plt = 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;
- h->needs_plt = 0;
- }
- return TRUE;
+ _bfd_error_handler
+ /* xgettext:c-format */
+ (_("%pB: direct GOT relocation R_386_GOT32X against `%s' without base"
+ " register can not be used when making a shared object"),
+ abfd, name);
+ return FALSE;
}
- /* 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->needs_plt)
- {
- if (h->plt.refcount <= 0
- || SYMBOL_CALLS_LOCAL (info, h)
- || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
- && h->root.type == bfd_link_hash_undefweak))
- {
- /* 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.offset = (bfd_vma) -1;
- h->needs_plt = 0;
- }
-
- 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.offset = (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->u.weakdef != NULL)
- {
- BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
- || h->u.weakdef->root.type == bfd_link_hash_defweak);
- h->root.u.def.section = h->u.weakdef->root.u.def.section;
- h->root.u.def.value = h->u.weakdef->root.u.def.value;
- if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
- h->non_got_ref = h->u.weakdef->non_got_ref;
- return TRUE;
- }
+ opcode = bfd_get_8 (abfd, contents + roff - 2);
- /* This is a reference to a symbol defined by a dynamic object which
- is not a function. */
+ /* Convert to R_386_32 if PIC is false or there is no base
+ register. */
+ to_reloc_32 = !is_pic || baseless;
- /* 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 (!bfd_link_executable (info))
- return TRUE;
+ eh = elf_x86_hash_entry (h);
- /* If there are no references to this symbol that do not use the
- GOT nor R_386_GOTOFF relocation, we don't need to generate a copy
+ /* Try to convert R_386_GOT32X. Get the symbol referred to by the
reloc. */
- eh = (struct elf_i386_link_hash_entry *) h;
- if (!h->non_got_ref && !eh->gotoff_ref)
- return TRUE;
-
- /* If -z nocopyreloc was given, we won't generate them either. */
- if (info->nocopyreloc)
+ if (h == NULL)
{
- h->non_got_ref = 0;
- return TRUE;
+ if (opcode == 0x0ff)
+ /* Convert "call/jmp *foo@GOT[(%reg)]". */
+ goto convert_branch;
+ else
+ /* Convert "mov foo@GOT[(%reg1)], %reg2",
+ "test %reg1, foo@GOT(%reg2)" and
+ "binop foo@GOT[(%reg1)], %reg2". */
+ goto convert_load;
}
- htab = elf_i386_hash_table (info);
- if (htab == NULL)
- return FALSE;
+ /* NB: Also set linker_def via SYMBOL_REFERENCES_LOCAL_P. */
+ local_ref = SYMBOL_REFERENCES_LOCAL_P (link_info, h);
- /* If there aren't any dynamic relocs in read-only sections nor
- R_386_GOTOFF relocation, then we can keep the dynamic relocs and
- avoid the copy reloc. This doesn't work on VxWorks, where we can
- not have dynamic relocations (other than copy and jump slot
- relocations) in an executable. */
- if (ELIMINATE_COPY_RELOCS
- && !eh->gotoff_ref
- && !get_elf_i386_backend_data (info->output_bfd)->is_vxworks)
+ /* Undefined weak symbol is only bound locally in executable
+ and its reference is resolved as 0. */
+ if (h->root.type == bfd_link_hash_undefweak
+ && !eh->linker_def
+ && local_ref)
{
- for (p = eh->dyn_relocs; p != NULL; p = p->next)
+ if (opcode == 0xff)
{
- s = p->sec->output_section;
- if (s != NULL && (s->flags & SEC_READONLY) != 0)
- break;
+ /* No direct branch to 0 for PIC. */
+ if (is_pic)
+ return TRUE;
+ else
+ goto convert_branch;
}
-
- if (p == NULL)
+ else
{
- h->non_got_ref = 0;
- return TRUE;
+ /* We can convert load of address 0 to R_386_32. */
+ to_reloc_32 = TRUE;
+ goto convert_load;
}
}
- /* 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. */
-
- /* 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. */
- if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
- {
- s = htab->elf.sdynrelro;
- srel = htab->elf.sreldynrelro;
- }
- else
- {
- s = htab->elf.sdynbss;
- srel = htab->elf.srelbss;
- }
- if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
- {
- srel->size += sizeof (Elf32_External_Rel);
- h->needs_copy = 1;
- }
-
- return _bfd_elf_adjust_dynamic_copy (info, h, s);
-}
-
-/* Allocate space in .plt, .got and associated reloc sections for
- dynamic relocs. */
-
-static bfd_boolean
-elf_i386_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
-{
- struct bfd_link_info *info;
- struct elf_i386_link_hash_table *htab;
- struct elf_i386_link_hash_entry *eh;
- struct elf_dyn_relocs *p;
- unsigned plt_entry_size;
- bfd_boolean resolved_to_zero;
-
- if (h->root.type == bfd_link_hash_indirect)
- return TRUE;
-
- eh = (struct elf_i386_link_hash_entry *) h;
-
- info = (struct bfd_link_info *) inf;
- htab = elf_i386_hash_table (info);
- if (htab == NULL)
- return FALSE;
-
- plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd);
-
- resolved_to_zero = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
- eh->has_got_reloc,
- eh);
-
- /* Clear the reference count of function pointer relocations if
- symbol isn't a normal function. */
- if (h->type != STT_FUNC)
- eh->func_pointer_refcount = 0;
-
- /* We can't use the GOT PLT if pointer equality is needed since
- finish_dynamic_symbol won't clear symbol value and the dynamic
- linker won't update the GOT slot. We will get into an infinite
- loop at run-time. */
- if (htab->plt_got != NULL
- && h->type != STT_GNU_IFUNC
- && !h->pointer_equality_needed
- && h->plt.refcount > 0
- && h->got.refcount > 0)
- {
- /* Don't use the regular PLT if there are both GOT and GOTPLT
- reloctions. */
- h->plt.offset = (bfd_vma) -1;
-
- /* Use the GOT PLT. */
- eh->plt_got.refcount = 1;
- }
-
- /* 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,
- &htab->readonly_dynrelocs_against_ifunc,
- plt_entry_size,
- plt_entry_size, 4, TRUE);
- /* Don't create the PLT entry if there are only function pointer
- relocations which can be resolved at run-time. */
- else if (htab->elf.dynamic_sections_created
- && (h->plt.refcount > eh->func_pointer_refcount
- || eh->plt_got.refcount > 0))
+ if (opcode == 0xff)
{
- bfd_boolean use_plt_got;
-
- /* Clear the reference count of function pointer relocations
- if PLT is used. */
- eh->func_pointer_refcount = 0;
-
- if (htab->plt_got != NULL
- && (info->flags & DF_BIND_NOW)
- && !h->pointer_equality_needed)
- {
- /* Don't use the regular PLT for DF_BIND_NOW. */
- h->plt.offset = (bfd_vma) -1;
-
- /* Use the GOT PLT. */
- h->got.refcount = 1;
- eh->plt_got.refcount = 1;
- }
-
- use_plt_got = eh->plt_got.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->forced_local
- && !resolved_to_zero
- && h->root.type == bfd_link_hash_undefweak)
- {
- if (! bfd_elf_link_record_dynamic_symbol (info, h))
- return FALSE;
- }
-
- if (bfd_link_pic (info)
- || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
+ /* We have "call/jmp *foo@GOT[(%reg)]". */
+ if ((h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak)
+ && local_ref)
{
- asection *s = htab->elf.splt;
- asection *got_s = htab->plt_got;
-
- /* If this is the first .plt entry, make room for the special
- first entry. The .plt section is used by prelink to undo
- prelinking for dynamic relocations. */
- if (s->size == 0)
- s->size = plt_entry_size;
-
- if (use_plt_got)
- eh->plt_got.offset = got_s->size;
- else
- h->plt.offset = 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
- location in the .plt. This is required to make function
- pointers compare as equal between the normal executable and
- the shared library. */
- if (! bfd_link_pic (info)
- && !h->def_regular)
+ /* The function is locally defined. */
+convert_branch:
+ /* Convert R_386_GOT32X to R_386_PC32. */
+ if (modrm == 0x15 || (modrm & 0xf8) == 0x90)
{
- if (use_plt_got)
+ /* Convert to "nop call foo". ADDR_PREFIX_OPCODE
+ is a nop prefix. */
+ modrm = 0xe8;
+ /* To support TLS optimization, always use addr32 prefix
+ for "call *___tls_get_addr@GOT(%reg)". */
+ if (eh && eh->tls_get_addr)
{
- /* We need to make a call to the entry of the GOT PLT
- instead of regular PLT entry. */
- h->root.u.def.section = got_s;
- h->root.u.def.value = eh->plt_got.offset;
+ nop = 0x67;
+ nop_offset = irel->r_offset - 2;
}
else
{
- h->root.u.def.section = s;
- h->root.u.def.value = h->plt.offset;
+ nop = htab->params->call_nop_byte;
+ if (htab->params->call_nop_as_suffix)
+ {
+ nop_offset = roff + 3;
+ irel->r_offset -= 1;
+ }
+ else
+ nop_offset = roff - 2;
}
}
-
- /* Make room for this entry. */
- if (use_plt_got)
- got_s->size += sizeof (elf_i386_got_plt_entry);
else
{
- s->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. */
- htab->elf.sgotplt->size += 4;
-
- /* There should be no PLT relocation against resolved
- undefined weak symbol in executable. */
- if (!resolved_to_zero)
- {
- /* We also need to make an entry in the .rel.plt
- section. */
- htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
- htab->elf.srelplt->reloc_count++;
- }
+ /* Convert to "jmp foo nop". */
+ modrm = 0xe9;
+ nop = NOP_OPCODE;
+ nop_offset = roff + 3;
+ irel->r_offset -= 1;
}
- if (get_elf_i386_backend_data (info->output_bfd)->is_vxworks
- && !bfd_link_pic (info))
- {
- /* VxWorks has a second set of relocations for each PLT entry
- in executables. They go in a separate relocation section,
- which is processed by the kernel loader. */
-
- /* There are two relocations for the initial PLT entry: an
- R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
- R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
-
- if (h->plt.offset == plt_entry_size)
- htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
-
- /* There are two extra relocations for each subsequent PLT entry:
- an R_386_32 relocation for the GOT entry, and an R_386_32
- relocation for the PLT entry. */
-
- htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
- }
- }
- else
- {
- eh->plt_got.offset = (bfd_vma) -1;
- h->plt.offset = (bfd_vma) -1;
- h->needs_plt = 0;
+ bfd_put_8 (abfd, nop, contents + nop_offset);
+ bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1);
+ /* When converting to PC-relative relocation, we
+ need to adjust addend by -4. */
+ bfd_put_32 (abfd, -4, contents + irel->r_offset);
+ irel->r_info = ELF32_R_INFO (r_symndx, R_386_PC32);
+ *r_type_p = R_386_PC32;
+ *converted = TRUE;
}
}
else
{
- eh->plt_got.offset = (bfd_vma) -1;
- h->plt.offset = (bfd_vma) -1;
- h->needs_plt = 0;
- }
-
- eh->tlsdesc_got = (bfd_vma) -1;
-
- /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
- make it a R_386_TLS_LE_32 requiring no TLS entry. */
- if (h->got.refcount > 0
- && bfd_link_executable (info)
- && h->dynindx == -1
- && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE))
- h->got.offset = (bfd_vma) -1;
- else if (h->got.refcount > 0)
- {
- asection *s;
- bfd_boolean dyn;
- int tls_type = elf_i386_hash_entry(h)->tls_type;
-
- /* 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->forced_local
- && !resolved_to_zero
- && h->root.type == bfd_link_hash_undefweak)
- {
- if (! bfd_elf_link_record_dynamic_symbol (info, h))
- return FALSE;
- }
-
- s = htab->elf.sgot;
- if (GOT_TLS_GDESC_P (tls_type))
- {
- eh->tlsdesc_got = htab->elf.sgotplt->size
- - elf_i386_compute_jump_table_size (htab);
- htab->elf.sgotplt->size += 8;
- h->got.offset = (bfd_vma) -2;
- }
- if (! GOT_TLS_GDESC_P (tls_type)
- || GOT_TLS_GD_P (tls_type))
- {
- h->got.offset = s->size;
- s->size += 4;
- /* R_386_TLS_GD needs 2 consecutive GOT slots. */
- if (GOT_TLS_GD_P (tls_type) || tls_type == GOT_TLS_IE_BOTH)
- s->size += 4;
- }
- dyn = htab->elf.dynamic_sections_created;
- /* R_386_TLS_IE_32 needs one dynamic relocation,
- R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
- (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
- need two), R_386_TLS_GD needs one if local symbol and two if
- global. No dynamic relocation against resolved undefined weak
- symbol in executable. */
- if (tls_type == GOT_TLS_IE_BOTH)
- htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
- else if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1)
- || (tls_type & GOT_TLS_IE))
- htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
- else if (GOT_TLS_GD_P (tls_type))
- htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
- else if (! GOT_TLS_GDESC_P (tls_type)
- && ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
- && !resolved_to_zero)
- || h->root.type != bfd_link_hash_undefweak)
- && (bfd_link_pic (info)
- || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
- htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
- if (GOT_TLS_GDESC_P (tls_type))
- htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
- }
- else
- h->got.offset = (bfd_vma) -1;
-
- if (eh->dyn_relocs == NULL)
- return TRUE;
+ /* We have "mov foo@GOT[(%re1g)], %reg2",
+ "test %reg1, foo@GOT(%reg2)" and
+ "binop foo@GOT[(%reg1)], %reg2".
- /* In the shared -Bsymbolic case, discard space allocated for
- dynamic pc-relative relocs against symbols which turn out to be
- defined in regular objects. For the normal shared case, discard
- space for pc-relative relocs that have become local due to symbol
- visibility changes. */
+ Avoid optimizing _DYNAMIC since ld.so may use its
+ link-time address. */
+ if (h == htab->elf.hdynamic)
+ return TRUE;
- if (bfd_link_pic (info))
- {
- /* The only reloc that uses pc_count is R_386_PC32, which will
- appear on a call or on something like ".long foo - .". We
- want calls to protected symbols to resolve directly to the
- function rather than going via the plt. If people want
- function pointer comparisons to work as expected then they
- should avoid writing assembly like ".long foo - .". */
- if (SYMBOL_CALLS_LOCAL (info, h))
+ /* def_regular is set by an assignment in a linker script in
+ bfd_elf_record_link_assignment. start_stop is set on
+ __start_SECNAME/__stop_SECNAME which mark section SECNAME. */
+ if (h->start_stop
+ || eh->linker_def
+ || ((h->def_regular
+ || h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak)
+ && local_ref))
{
- struct elf_dyn_relocs **pp;
-
- for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
+convert_load:
+ if (opcode == 0x8b)
{
- p->count -= p->pc_count;
- p->pc_count = 0;
- if (p->count == 0)
- *pp = p->next;
+ if (to_reloc_32)
+ {
+ /* Convert "mov foo@GOT[(%reg1)], %reg2" to
+ "mov $foo, %reg2" with R_386_32. */
+ r_type = R_386_32;
+ modrm = 0xc0 | (modrm & 0x38) >> 3;
+ bfd_put_8 (abfd, modrm, contents + roff - 1);
+ opcode = 0xc7;
+ }
else
- pp = &p->next;
+ {
+ /* Convert "mov foo@GOT(%reg1), %reg2" to
+ "lea foo@GOTOFF(%reg1), %reg2". */
+ r_type = R_386_GOTOFF;
+ opcode = 0x8d;
+ }
}
- }
-
- if (get_elf_i386_backend_data (info->output_bfd)->is_vxworks)
- {
- struct elf_dyn_relocs **pp;
- for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
+ else
{
- if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
- *pp = p->next;
- else
- pp = &p->next;
- }
- }
+ /* Only R_386_32 is supported. */
+ if (!to_reloc_32)
+ return TRUE;
- /* Also discard relocs on undefined weak syms with non-default
- visibility or in PIE. */
- if (eh->dyn_relocs != NULL
- && h->root.type == bfd_link_hash_undefweak)
- {
- /* Undefined weak symbol is never bound locally in shared
- library. */
- if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
- || resolved_to_zero)
- {
- if (h->non_got_ref)
+ if (opcode == 0x85)
{
- /* Keep dynamic non-GOT/non-PLT relocation so that we
- can branch to 0 without PLT. */
- struct elf_dyn_relocs **pp;
-
- for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
- if (p->pc_count == 0)
- *pp = p->next;
- else
- {
- /* Remove non-R_386_PC32 relocation. */
- p->count = p->pc_count;
- pp = &p->next;
- }
-
- if (eh->dyn_relocs != NULL)
- {
- /* Make sure undefined weak symbols are output
- as dynamic symbols in PIEs for dynamic non-GOT
- non-PLT reloations. */
- if (! bfd_elf_link_record_dynamic_symbol (info, h))
- return FALSE;
- }
+ /* Convert "test %reg1, foo@GOT(%reg2)" to
+ "test $foo, %reg1". */
+ modrm = 0xc0 | (modrm & 0x38) >> 3;
+ opcode = 0xf7;
+ }
+ else
+ {
+ /* Convert "binop foo@GOT(%reg1), %reg2" to
+ "binop $foo, %reg2". */
+ modrm = (0xc0
+ | (modrm & 0x38) >> 3
+ | (opcode & 0x3c));
+ opcode = 0x81;
}
- else
- eh->dyn_relocs = NULL;
- }
- else if (h->dynindx == -1
- && !h->forced_local)
- {
- if (! bfd_elf_link_record_dynamic_symbol (info, h))
- return FALSE;
- }
- }
- }
- else if (ELIMINATE_COPY_RELOCS)
- {
- /* For the non-shared case, discard space for relocs against
- symbols which turn out to need copy relocs or are not
- dynamic. Keep dynamic relocations for run-time function
- pointer initialization. */
-
- if ((!h->non_got_ref
- || eh->func_pointer_refcount > 0
- || (h->root.type == bfd_link_hash_undefweak
- && !resolved_to_zero))
- && ((h->def_dynamic
- && !h->def_regular)
- || (htab->elf.dynamic_sections_created
- && (h->root.type == bfd_link_hash_undefweak
- || h->root.type == bfd_link_hash_undefined))))
- {
- /* Make sure this symbol is output as a dynamic symbol.
- Undefined weak syms won't yet be marked as dynamic. */
- if (h->dynindx == -1
- && !h->forced_local
- && !resolved_to_zero
- && h->root.type == bfd_link_hash_undefweak)
- {
- if (! bfd_elf_link_record_dynamic_symbol (info, h))
- return FALSE;
+ bfd_put_8 (abfd, modrm, contents + roff - 1);
+ r_type = R_386_32;
}
- /* If that succeeded, we know we'll be keeping all the
- relocs. */
- if (h->dynindx != -1)
- goto keep;
+ bfd_put_8 (abfd, opcode, contents + roff - 2);
+ irel->r_info = ELF32_R_INFO (r_symndx, r_type);
+ *r_type_p = r_type;
+ *converted = TRUE;
}
-
- eh->dyn_relocs = NULL;
- eh->func_pointer_refcount = 0;
-
- keep: ;
- }
-
- /* Finally, allocate space. */
- for (p = eh->dyn_relocs; p != NULL; p = p->next)
- {
- asection *sreloc;
-
- sreloc = elf_section_data (p->sec)->sreloc;
-
- BFD_ASSERT (sreloc != NULL);
- sreloc->size += p->count * sizeof (Elf32_External_Rel);
}
return TRUE;
}
-/* Allocate space in .plt, .got and associated reloc sections for
- local dynamic relocs. */
-
-static bfd_boolean
-elf_i386_allocate_local_dynrelocs (void **slot, void *inf)
-{
- struct elf_link_hash_entry *h
- = (struct elf_link_hash_entry *) *slot;
-
- if (h->type != STT_GNU_IFUNC
- || !h->def_regular
- || !h->ref_regular
- || !h->forced_local
- || h->root.type != bfd_link_hash_defined)
- abort ();
-
- return elf_i386_allocate_dynrelocs (h, inf);
-}
-
-/* Find any dynamic relocs that apply to read-only sections. */
-
-static bfd_boolean
-elf_i386_readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
-{
- struct elf_i386_link_hash_entry *eh;
- struct elf_dyn_relocs *p;
-
- /* Skip local IFUNC symbols. */
- if (h->forced_local && h->type == STT_GNU_IFUNC)
- return TRUE;
-
- eh = (struct elf_i386_link_hash_entry *) h;
- for (p = eh->dyn_relocs; p != NULL; p = p->next)
- {
- asection *s = p->sec->output_section;
-
- if (s != NULL && (s->flags & SEC_READONLY) != 0)
- {
- struct bfd_link_info *info = (struct bfd_link_info *) inf;
-
- info->flags |= DF_TEXTREL;
-
- if ((info->warn_shared_textrel && bfd_link_pic (info))
- || info->error_textrel)
- /* xgettext:c-format */
- info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'\n"),
- p->sec->owner, h->root.root.string,
- p->sec);
-
- /* Not an error, just cut short the traversal. */
- return FALSE;
- }
- }
- return TRUE;
-}
+/* Rename some of the generic section flags to better document how they
+ are used here. */
+#define check_relocs_failed sec_flg0
-/* Convert load via the GOT slot to load immediate. */
+/* Look through the relocs for a section during the first phase, and
+ calculate needed space in the global offset table, procedure linkage
+ table, and dynamic reloc sections. */
static bfd_boolean
-elf_i386_convert_load (bfd *abfd, asection *sec,
- struct bfd_link_info *link_info)
+elf_i386_check_relocs (bfd *abfd,
+ struct bfd_link_info *info,
+ asection *sec,
+ const Elf_Internal_Rela *relocs)
{
- struct elf_i386_link_hash_table *htab;
+ struct elf_x86_link_hash_table *htab;
Elf_Internal_Shdr *symtab_hdr;
- Elf_Internal_Rela *internal_relocs;
- Elf_Internal_Rela *irel, *irelend;
+ struct elf_link_hash_entry **sym_hashes;
+ const Elf_Internal_Rela *rel;
+ const Elf_Internal_Rela *rel_end;
+ asection *sreloc;
bfd_byte *contents;
- bfd_boolean changed;
- 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;
+ bfd_boolean converted;
- /* Nothing to do if there is no need or no output. */
- if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC)
- || sec->need_convert_load == 0
- || bfd_is_abs_section (sec->output_section))
+ if (bfd_link_relocatable (info))
return TRUE;
- symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
+ /* Don't do anything special with non-loaded, non-alloced sections.
+ In particular, any relocs in such sections should not affect GOT
+ and PLT reference counting (ie. we don't allow them to create GOT
+ or PLT entries), there's no possibility or desire to optimize TLS
+ relocs, and there's not much point in propagating relocs to shared
+ libs that the dynamic linker won't relocate. */
+ if ((sec->flags & SEC_ALLOC) == 0)
+ return TRUE;
- /* 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_hash_table (info, I386_ELF_DATA);
+ if (htab == NULL)
+ {
+ sec->check_relocs_failed = 1;
+ return FALSE;
+ }
- changed = FALSE;
- htab = elf_i386_hash_table (link_info);
- local_got_refcounts = elf_local_got_refcounts (abfd);
+ BFD_ASSERT (is_x86_elf (abfd, htab));
/* Get the section contents. */
if (elf_section_data (sec)->this_hdr.contents != NULL)
contents = elf_section_data (sec)->this_hdr.contents;
- else
+ else if (!bfd_malloc_and_get_section (abfd, sec, &contents))
{
- if (!bfd_malloc_and_get_section (abfd, sec, &contents))
- goto error_return;
+ sec->check_relocs_failed = 1;
+ return FALSE;
}
- irelend = internal_relocs + sec->reloc_count;
- for (irel = internal_relocs; irel < irelend; irel++)
+ symtab_hdr = &elf_symtab_hdr (abfd);
+ sym_hashes = elf_sym_hashes (abfd);
+
+ converted = FALSE;
+
+ sreloc = NULL;
+
+ rel_end = relocs + sec->reloc_count;
+ for (rel = relocs; rel < rel_end; rel++)
{
- unsigned int r_type = ELF32_R_TYPE (irel->r_info);
+ unsigned int r_type;
unsigned int r_symndx;
struct elf_link_hash_entry *h;
- bfd_boolean converted;
+ struct elf_x86_link_hash_entry *eh;
+ Elf_Internal_Sym *isym;
+ const char *name;
+ bfd_boolean size_reloc;
- /* Don't convert R_386_GOT32 since we can't tell if it is applied
- to "mov $foo@GOT, %reg" which isn't a load via GOT. */
- if (r_type != R_386_GOT32X)
- continue;
+ r_symndx = ELF32_R_SYM (rel->r_info);
+ r_type = ELF32_R_TYPE (rel->r_info);
- r_symndx = ELF32_R_SYM (irel->r_info);
- if (r_symndx < symtab_hdr->sh_info)
- h = elf_i386_get_local_sym_hash (htab, sec->owner,
- (const Elf_Internal_Rela *) irel,
- FALSE);
- else
+ if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
{
- h = elf_sym_hashes (abfd)[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;
+ /* xgettext:c-format */
+ _bfd_error_handler (_("%pB: bad symbol index: %d"),
+ abfd, r_symndx);
+ goto error_return;
}
- /* STT_GNU_IFUNC must keep GOT32 relocations. */
- if (h != NULL && h->type == STT_GNU_IFUNC)
- continue;
-
- converted = FALSE;
- if (!elf_i386_convert_load_reloc (abfd, symtab_hdr, contents,
- irel, h, &converted, link_info))
- goto error_return;
-
- if (converted)
+ if (r_symndx < symtab_hdr->sh_info)
{
- changed = converted;
- if (h)
+ /* A local symbol. */
+ isym = bfd_sym_from_r_symndx (&htab->sym_cache,
+ abfd, r_symndx);
+ if (isym == NULL)
+ goto error_return;
+
+ /* Check relocation against local STT_GNU_IFUNC symbol. */
+ if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
{
- if (h->got.refcount > 0)
- h->got.refcount -= 1;
+ h = _bfd_elf_x86_get_local_sym_hash (htab, abfd, rel, TRUE);
+ if (h == NULL)
+ goto error_return;
+
+ /* Fake a STT_GNU_IFUNC symbol. */
+ h->root.root.string = bfd_elf_sym_name (abfd, symtab_hdr,
+ isym, NULL);
+ h->type = STT_GNU_IFUNC;
+ h->def_regular = 1;
+ h->ref_regular = 1;
+ h->forced_local = 1;
+ h->root.type = bfd_link_hash_defined;
}
else
- {
- if (local_got_refcounts != NULL
- && local_got_refcounts[r_symndx] > 0)
- local_got_refcounts[r_symndx] -= 1;
- }
+ h = NULL;
}
- }
-
- if (contents != NULL
- && elf_section_data (sec)->this_hdr.contents != contents)
- {
- if (!changed && !link_info->keep_memory)
- free (contents);
else
{
- /* Cache the section contents for elf_link_input_bfd. */
- elf_section_data (sec)->this_hdr.contents = contents;
+ isym = NULL;
+ 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;
}
- }
- if (elf_section_data (sec)->relocs != internal_relocs)
- {
- if (!changed)
- free (internal_relocs);
- else
- elf_section_data (sec)->relocs = internal_relocs;
- }
+ eh = (struct elf_x86_link_hash_entry *) h;
+ if (h != NULL)
+ {
+ if (r_type == R_386_GOTOFF)
+ eh->gotoff_ref = 1;
- return TRUE;
+ /* It is referenced by a non-shared object. */
+ h->ref_regular = 1;
+ }
- 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;
-}
+ if (r_type == R_386_GOT32X
+ && (h == NULL || h->type != STT_GNU_IFUNC))
+ {
+ Elf_Internal_Rela *irel = (Elf_Internal_Rela *) rel;
+ if (!elf_i386_convert_load_reloc (abfd, symtab_hdr, contents,
+ &r_type, irel, h,
+ &converted, info))
+ goto error_return;
+ }
-/* Set the sizes of the dynamic sections. */
+ if (! elf_i386_tls_transition (info, abfd, sec, contents,
+ symtab_hdr, sym_hashes,
+ &r_type, GOT_UNKNOWN,
+ rel, rel_end, h, r_symndx, FALSE))
+ goto error_return;
-static bfd_boolean
-elf_i386_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
-{
- struct elf_i386_link_hash_table *htab;
- bfd *dynobj;
- asection *s;
- bfd_boolean relocs;
- bfd *ibfd;
+ /* Check if _GLOBAL_OFFSET_TABLE_ is referenced. */
+ if (h == htab->elf.hgot)
+ htab->got_referenced = TRUE;
- htab = elf_i386_hash_table (info);
- if (htab == NULL)
- return FALSE;
- dynobj = htab->elf.dynobj;
- if (dynobj == NULL)
- abort ();
+ switch (r_type)
+ {
+ case R_386_TLS_LDM:
+ htab->tls_ld_or_ldm_got.refcount = 1;
+ goto create_got;
- /* Set up .got offsets for local syms, and space for local dynamic
- relocs. */
- for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
- {
- bfd_signed_vma *local_got;
- bfd_signed_vma *end_local_got;
- char *local_tls_type;
- bfd_vma *local_tlsdesc_gotent;
- bfd_size_type locsymcount;
- Elf_Internal_Shdr *symtab_hdr;
- asection *srel;
-
- if (! is_i386_elf (ibfd))
- continue;
+ 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;
+
+ eh->zero_undefweak &= 0x2;
+ h->needs_plt = 1;
+ h->plt.refcount = 1;
+ break;
+
+ case R_386_SIZE32:
+ size_reloc = TRUE;
+ goto do_size;
+
+ case R_386_TLS_IE_32:
+ case R_386_TLS_IE:
+ case R_386_TLS_GOTIE:
+ if (!bfd_link_executable (info))
+ info->flags |= DF_STATIC_TLS;
+ /* Fall through */
+
+ case R_386_GOT32:
+ case R_386_GOT32X:
+ case R_386_TLS_GD:
+ case R_386_TLS_GOTDESC:
+ case R_386_TLS_DESC_CALL:
+ /* This symbol requires a global offset table entry. */
+ {
+ int tls_type, old_tls_type;
+
+ switch (r_type)
+ {
+ default:
+ case R_386_GOT32:
+ case R_386_GOT32X:
+ tls_type = GOT_NORMAL;
+ break;
+ case R_386_TLS_GD: tls_type = GOT_TLS_GD; break;
+ case R_386_TLS_GOTDESC:
+ case R_386_TLS_DESC_CALL:
+ tls_type = GOT_TLS_GDESC; break;
+ case R_386_TLS_IE_32:
+ if (ELF32_R_TYPE (rel->r_info) == r_type)
+ tls_type = GOT_TLS_IE_NEG;
+ else
+ /* If this is a GD->IE transition, we may use either of
+ R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
+ tls_type = GOT_TLS_IE;
+ break;
+ case R_386_TLS_IE:
+ case R_386_TLS_GOTIE:
+ tls_type = GOT_TLS_IE_POS; break;
+ }
+
+ if (h != NULL)
+ {
+ h->got.refcount = 1;
+ old_tls_type = elf_x86_hash_entry (h)->tls_type;
+ }
+ else
+ {
+ bfd_signed_vma *local_got_refcounts;
+
+ /* This is a global offset table entry for a local symbol. */
+ local_got_refcounts = elf_local_got_refcounts (abfd);
+ if (local_got_refcounts == NULL)
+ {
+ bfd_size_type size;
+
+ size = symtab_hdr->sh_info;
+ size *= (sizeof (bfd_signed_vma)
+ + sizeof (bfd_vma) + sizeof(char));
+ local_got_refcounts = (bfd_signed_vma *)
+ bfd_zalloc (abfd, size);
+ if (local_got_refcounts == NULL)
+ goto error_return;
+ elf_local_got_refcounts (abfd) = local_got_refcounts;
+ elf_x86_local_tlsdesc_gotent (abfd)
+ = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
+ elf_x86_local_got_tls_type (abfd)
+ = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
+ }
+ local_got_refcounts[r_symndx] = 1;
+ old_tls_type = elf_x86_local_got_tls_type (abfd) [r_symndx];
+ }
- for (s = ibfd->sections; s != NULL; s = s->next)
- {
- struct elf_dyn_relocs *p;
+ if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE))
+ tls_type |= old_tls_type;
+ /* If a TLS symbol is accessed using IE at least once,
+ there is no point to use dynamic model for it. */
+ else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
+ && (! GOT_TLS_GD_ANY_P (old_tls_type)
+ || (tls_type & GOT_TLS_IE) == 0))
+ {
+ if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type))
+ tls_type = old_tls_type;
+ else if (GOT_TLS_GD_ANY_P (old_tls_type)
+ && GOT_TLS_GD_ANY_P (tls_type))
+ tls_type |= old_tls_type;
+ else
+ {
+ if (h)
+ name = h->root.root.string;
+ else
+ name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
+ NULL);
+ _bfd_error_handler
+ /* xgettext:c-format */
+ (_("%pB: `%s' accessed both as normal and "
+ "thread local symbol"),
+ abfd, name);
+ bfd_set_error (bfd_error_bad_value);
+ goto error_return;
+ }
+ }
- if (!elf_i386_convert_load (ibfd, s, info))
- return FALSE;
+ if (old_tls_type != tls_type)
+ {
+ if (h != NULL)
+ elf_x86_hash_entry (h)->tls_type = tls_type;
+ else
+ elf_x86_local_got_tls_type (abfd) [r_symndx] = tls_type;
+ }
+ }
+ /* Fall through */
- for (p = ((struct elf_dyn_relocs *)
- elf_section_data (s)->local_dynrel);
- p != NULL;
- p = p->next)
+ case R_386_GOTOFF:
+ case R_386_GOTPC:
+create_got:
+ if (r_type != R_386_TLS_IE)
{
- if (!bfd_is_abs_section (p->sec)
- && bfd_is_abs_section (p->sec->output_section))
- {
- /* Input section has been discarded, either because
- it is a copy of a linkonce section or due to
- linker script /DISCARD/, so we'll be discarding
- the relocs too. */
- }
- else if (get_elf_i386_backend_data (output_bfd)->is_vxworks
- && strcmp (p->sec->output_section->name,
- ".tls_vars") == 0)
- {
- /* Relocations in vxworks .tls_vars sections are
- handled specially by the loader. */
- }
- else if (p->count != 0)
+ if (eh != NULL)
{
- srel = elf_section_data (p->sec)->sreloc;
- srel->size += p->count * sizeof (Elf32_External_Rel);
- if ((p->sec->output_section->flags & SEC_READONLY) != 0
- && (info->flags & DF_TEXTREL) == 0)
- {
- info->flags |= DF_TEXTREL;
- if ((info->warn_shared_textrel && bfd_link_pic (info))
- || info->error_textrel)
- /* xgettext:c-format */
- info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"),
- p->sec->owner, p->sec);
- }
+ eh->zero_undefweak &= 0x2;
+
+ /* Need GOT to resolve undefined weak symbol to 0. */
+ if (r_type == R_386_GOTOFF
+ && h->root.type == bfd_link_hash_undefweak
+ && bfd_link_executable (info))
+ htab->got_referenced = TRUE;
}
+ break;
}
- }
+ /* Fall through */
- local_got = elf_local_got_refcounts (ibfd);
- if (!local_got)
- continue;
+ case R_386_TLS_LE_32:
+ case R_386_TLS_LE:
+ if (eh != NULL)
+ eh->zero_undefweak &= 0x2;
+ if (bfd_link_executable (info))
+ break;
+ info->flags |= DF_STATIC_TLS;
+ goto do_relocation;
- symtab_hdr = &elf_symtab_hdr (ibfd);
- locsymcount = symtab_hdr->sh_info;
- end_local_got = local_got + locsymcount;
- local_tls_type = elf_i386_local_got_tls_type (ibfd);
- local_tlsdesc_gotent = elf_i386_local_tlsdesc_gotent (ibfd);
- s = htab->elf.sgot;
- srel = htab->elf.srelgot;
- for (; local_got < end_local_got;
- ++local_got, ++local_tls_type, ++local_tlsdesc_gotent)
- {
- *local_tlsdesc_gotent = (bfd_vma) -1;
- if (*local_got > 0)
+ case R_386_32:
+ case R_386_PC32:
+ if (eh != NULL && (sec->flags & SEC_CODE) != 0)
+ eh->zero_undefweak |= 0x2;
+do_relocation:
+ /* We are called after all symbols have been resolved. Only
+ relocation against STT_GNU_IFUNC symbol must go through
+ PLT. */
+ if (h != NULL
+ && (bfd_link_executable (info)
+ || h->type == STT_GNU_IFUNC))
{
- if (GOT_TLS_GDESC_P (*local_tls_type))
+ bfd_boolean func_pointer_ref = FALSE;
+
+ if (r_type == R_386_PC32)
{
- *local_tlsdesc_gotent = htab->elf.sgotplt->size
- - elf_i386_compute_jump_table_size (htab);
- htab->elf.sgotplt->size += 8;
- *local_got = (bfd_vma) -2;
+ /* Since something like ".long foo - ." may be used
+ as pointer, make sure that PLT is used if foo is
+ a function defined in a shared library. */
+ if ((sec->flags & SEC_CODE) == 0)
+ h->pointer_equality_needed = 1;
+ else if (h->type == STT_GNU_IFUNC
+ && bfd_link_pic (info))
+ {
+ _bfd_error_handler
+ /* xgettext:c-format */
+ (_("%pB: unsupported non-PIC call to IFUNC `%s'"),
+ abfd, h->root.root.string);
+ bfd_set_error (bfd_error_bad_value);
+ goto error_return;
+ }
}
- if (! GOT_TLS_GDESC_P (*local_tls_type)
- || GOT_TLS_GD_P (*local_tls_type))
+ else
{
- *local_got = s->size;
- s->size += 4;
- if (GOT_TLS_GD_P (*local_tls_type)
- || *local_tls_type == GOT_TLS_IE_BOTH)
- s->size += 4;
+ h->pointer_equality_needed = 1;
+ /* R_386_32 can be resolved at run-time. */
+ if (r_type == R_386_32
+ && (sec->flags & SEC_READONLY) == 0)
+ func_pointer_ref = TRUE;
}
- if (bfd_link_pic (info)
- || GOT_TLS_GD_ANY_P (*local_tls_type)
- || (*local_tls_type & GOT_TLS_IE))
+
+ if (!func_pointer_ref)
{
- if (*local_tls_type == GOT_TLS_IE_BOTH)
- srel->size += 2 * sizeof (Elf32_External_Rel);
- else if (GOT_TLS_GD_P (*local_tls_type)
- || ! GOT_TLS_GDESC_P (*local_tls_type))
- srel->size += sizeof (Elf32_External_Rel);
- if (GOT_TLS_GDESC_P (*local_tls_type))
- htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
+ /* If this reloc is in a read-only section, we might
+ need a copy reloc. We can't check reliably at this
+ stage whether the section is read-only, as input
+ sections have not yet been mapped to output sections.
+ Tentatively set the flag for now, and correct in
+ adjust_dynamic_symbol. */
+ h->non_got_ref = 1;
+
+ /* We may need a .plt entry if the symbol is a function
+ defined in a shared lib or is a function referenced
+ from the code or read-only section. */
+ if (!h->def_regular
+ || (sec->flags & (SEC_CODE | SEC_READONLY)) != 0)
+ h->plt.refcount = 1;
}
}
- else
- *local_got = (bfd_vma) -1;
- }
- }
- if (htab->tls_ldm_got.refcount > 0)
- {
- /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
- relocs. */
- htab->tls_ldm_got.offset = htab->elf.sgot->size;
- htab->elf.sgot->size += 8;
- htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
- }
- else
- htab->tls_ldm_got.offset = -1;
+ size_reloc = FALSE;
+do_size:
+ if (NEED_DYNAMIC_RELOCATION_P (info, FALSE, h, sec, r_type,
+ R_386_32))
+ {
+ struct elf_dyn_relocs *p;
+ struct elf_dyn_relocs **head;
- /* Allocate global sym .plt and .got entries, and space for global
- sym dynamic relocs. */
- elf_link_hash_traverse (&htab->elf, elf_i386_allocate_dynrelocs, info);
+ /* We must copy these reloc types into the output file.
+ Create a reloc section in dynobj and make room for
+ this reloc. */
+ if (sreloc == NULL)
+ {
+ sreloc = _bfd_elf_make_dynamic_reloc_section
+ (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ FALSE);
- /* Allocate .plt and .got entries, and space for local symbols. */
- htab_traverse (htab->loc_hash_table,
- elf_i386_allocate_local_dynrelocs,
- info);
+ if (sreloc == NULL)
+ goto error_return;
+ }
- /* For every jump slot reserved in the sgotplt, reloc_count is
- 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.
+ /* If this is a global symbol, we count the number of
+ relocations we need for this symbol. */
+ if (h != NULL)
+ {
+ head = &eh->dyn_relocs;
+ }
+ else
+ {
+ /* Track dynamic relocs needed for local syms too.
+ We really need local syms available to do this
+ easily. Oh well. */
+ void **vpp;
+ asection *s;
- PR ld/13302: We start next_irelative_index at the end of .rela.plt
- so that R_386_IRELATIVE entries come last. */
- if (htab->elf.srelplt)
- {
- htab->next_tls_desc_index = htab->elf.srelplt->reloc_count;
- htab->sgotplt_jump_table_size = htab->next_tls_desc_index * 4;
- 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;
+ isym = bfd_sym_from_r_symndx (&htab->sym_cache,
+ abfd, r_symndx);
+ if (isym == NULL)
+ goto error_return;
+ s = bfd_section_from_elf_index (abfd, isym->st_shndx);
+ if (s == NULL)
+ s = sec;
- if (htab->elf.sgotplt)
- {
- /* Don't allocate .got.plt section if there are no GOT nor PLT
- entries and there is no reference 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.splt->size == 0)
- && (htab->elf.sgot == NULL
- || htab->elf.sgot->size == 0)
- && (htab->elf.iplt == NULL
- || htab->elf.iplt->size == 0)
- && (htab->elf.igotplt == NULL
- || htab->elf.igotplt->size == 0))
- htab->elf.sgotplt->size = 0;
- }
+ vpp = &elf_section_data (s)->local_dynrel;
+ head = (struct elf_dyn_relocs **)vpp;
+ }
- if (_bfd_elf_eh_frame_present (info))
- {
- if (htab->plt_eh_frame != NULL
- && htab->elf.splt != NULL
- && htab->elf.splt->size != 0
- && !bfd_is_abs_section (htab->elf.splt->output_section))
- htab->plt_eh_frame->size
- = get_elf_i386_backend_data (output_bfd)->plt->eh_frame_plt_size;
-
- if (htab->plt_got_eh_frame != NULL
- && htab->plt_got != NULL
- && htab->plt_got->size != 0
- && !bfd_is_abs_section (htab->plt_got->output_section))
- htab->plt_got_eh_frame->size
- = get_elf_i386_backend_data (output_bfd)->plt->eh_frame_plt_got_size;
- }
+ p = *head;
+ if (p == NULL || p->sec != sec)
+ {
+ bfd_size_type amt = sizeof *p;
+ p = (struct elf_dyn_relocs *) bfd_alloc (htab->elf.dynobj,
+ amt);
+ if (p == NULL)
+ goto error_return;
+ p->next = *head;
+ *head = p;
+ p->sec = sec;
+ p->count = 0;
+ p->pc_count = 0;
+ }
- /* We now have determined the sizes of the various dynamic sections.
- Allocate memory for them. */
- relocs = FALSE;
- for (s = dynobj->sections; s != NULL; s = s->next)
- {
- bfd_boolean strip_section = TRUE;
+ p->count += 1;
+ /* Count size relocation as PC-relative relocation. */
+ if (r_type == R_386_PC32 || size_reloc)
+ p->pc_count += 1;
+ }
+ break;
- if ((s->flags & SEC_LINKER_CREATED) == 0)
- continue;
+ /* This relocation describes the C++ object vtable hierarchy.
+ Reconstruct it for later use during GC. */
+ case R_386_GNU_VTINHERIT:
+ if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
+ goto error_return;
+ break;
- if (s == htab->elf.splt
- || s == htab->elf.sgot)
- {
- /* Strip this section if we don't need it; see the
- comment below. */
- /* We'd like to strip these sections if they aren't needed, but if
- we've exported dynamic symbols from them we must leave them.
- It's too late to tell BFD to get rid of the symbols. */
-
- if (htab->elf.hplt != NULL)
- strip_section = FALSE;
- }
- else if (s == htab->elf.sgotplt
- || s == htab->elf.iplt
- || s == htab->elf.igotplt
- || s == htab->plt_got
- || s == htab->plt_eh_frame
- || s == htab->plt_got_eh_frame
- || s == htab->elf.sdynbss
- || s == htab->elf.sdynrelro)
- {
- /* Strip these too. */
- }
- else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rel"))
- {
- if (s->size != 0
- && s != htab->elf.srelplt
- && s != htab->srelplt2)
- relocs = 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;
- }
+ /* This relocation describes which C++ vtable entries are actually
+ used. Record for later use during GC. */
+ case R_386_GNU_VTENTRY:
+ if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
+ goto error_return;
+ break;
- if (s->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. */
- if (strip_section)
- s->flags |= SEC_EXCLUDE;
- continue;
+ default:
+ break;
}
-
- if ((s->flags & SEC_HAS_CONTENTS) == 0)
- 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 = (unsigned char *) bfd_zalloc (dynobj, s->size);
- if (s->contents == NULL)
- return FALSE;
}
- if (htab->plt_eh_frame != NULL
- && htab->plt_eh_frame->contents != NULL)
- {
- memcpy (htab->plt_eh_frame->contents,
- get_elf_i386_backend_data (output_bfd)->plt->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->plt_got_eh_frame != NULL
- && htab->plt_got_eh_frame->contents != NULL)
- {
- memcpy (htab->plt_got_eh_frame->contents,
- get_elf_i386_backend_data (output_bfd)->plt->eh_frame_plt_got,
- htab->plt_got_eh_frame->size);
- bfd_put_32 (dynobj, htab->plt_got->size,
- (htab->plt_got_eh_frame->contents
- + PLT_FDE_LEN_OFFSET));
- }
-
- if (htab->elf.dynamic_sections_created)
+ if (elf_section_data (sec)->this_hdr.contents != contents)
{
- /* 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. */
-#define add_dynamic_entry(TAG, VAL) \
- _bfd_elf_add_dynamic_entry (info, TAG, VAL)
-
- if (bfd_link_executable (info))
- {
- if (!add_dynamic_entry (DT_DEBUG, 0))
- return FALSE;
- }
-
- if (htab->elf.splt->size != 0)
- {
- /* DT_PLTGOT is used by prelink even if there is no PLT
- relocation. */
- if (!add_dynamic_entry (DT_PLTGOT, 0))
- return FALSE;
- }
-
- if (htab->elf.srelplt->size != 0)
- {
- if (!add_dynamic_entry (DT_PLTRELSZ, 0)
- || !add_dynamic_entry (DT_PLTREL, DT_REL)
- || !add_dynamic_entry (DT_JMPREL, 0))
- return FALSE;
- }
-
- if (relocs)
+ if (!converted && !info->keep_memory)
+ free (contents);
+ else
{
- if (!add_dynamic_entry (DT_REL, 0)
- || !add_dynamic_entry (DT_RELSZ, 0)
- || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
- return FALSE;
-
- /* 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_i386_readonly_dynrelocs, info);
-
- if ((info->flags & DF_TEXTREL) != 0)
- {
- if (htab->readonly_dynrelocs_against_ifunc)
- {
- info->callbacks->einfo
- (_("%P%X: read-only segment has dynamic IFUNC relocations; recompile with -fPIC\n"));
- bfd_set_error (bfd_error_bad_value);
- return FALSE;
- }
-
- if (!add_dynamic_entry (DT_TEXTREL, 0))
- return FALSE;
- }
+ /* Cache the section contents for elf_link_input_bfd if any
+ load is converted or --no-keep-memory isn't used. */
+ elf_section_data (sec)->this_hdr.contents = contents;
}
- if (get_elf_i386_backend_data (output_bfd)->is_vxworks
- && !elf_vxworks_add_dynamic_entries (output_bfd, info))
- return FALSE;
}
-#undef add_dynamic_entry
-
- return TRUE;
-}
-
-static bfd_boolean
-elf_i386_always_size_sections (bfd *output_bfd,
- struct bfd_link_info *info)
-{
- asection *tls_sec = elf_hash_table (info)->tls_sec;
-
- if (tls_sec)
- {
- struct elf_link_hash_entry *tlsbase;
-
- tlsbase = elf_link_hash_lookup (elf_hash_table (info),
- "_TLS_MODULE_BASE_",
- FALSE, FALSE, FALSE);
-
- if (tlsbase && tlsbase->type == STT_TLS)
- {
- struct elf_i386_link_hash_table *htab;
- struct bfd_link_hash_entry *bh = NULL;
- const struct elf_backend_data *bed
- = get_elf_backend_data (output_bfd);
-
- htab = elf_i386_hash_table (info);
- if (htab == NULL)
- return FALSE;
-
- if (!(_bfd_generic_link_add_one_symbol
- (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
- tls_sec, 0, NULL, FALSE,
- bed->collect, &bh)))
- return FALSE;
- htab->tls_module_base = bh;
-
- tlsbase = (struct elf_link_hash_entry *)bh;
- tlsbase->def_regular = 1;
- tlsbase->other = STV_HIDDEN;
- tlsbase->root.linker_def = 1;
- (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
- }
- }
+ /* Cache relocations if any load is converted. */
+ if (elf_section_data (sec)->relocs != relocs && converted)
+ elf_section_data (sec)->relocs = (Elf_Internal_Rela *) relocs;
return TRUE;
+
+error_return:
+ if (elf_section_data (sec)->this_hdr.contents != contents)
+ free (contents);
+ sec->check_relocs_failed = 1;
+ return FALSE;
}
/* Set the correct type for an x86 ELF section. We do this by the
{
const char *name;
- name = bfd_get_section_name (abfd, sec);
+ name = bfd_section_name (sec);
/* This is an ugly, but unfortunately necessary hack that is
needed when producing EFI binaries on x86. It tells
return TRUE;
}
-/* _TLS_MODULE_BASE_ needs to be treated especially when linking
- executables. Rather than setting it to the beginning of the TLS
- section, we have to set it to the end. This function may be called
- multiple times, it is idempotent. */
-
-static void
-elf_i386_set_tls_module_base (struct bfd_link_info *info)
-{
- struct elf_i386_link_hash_table *htab;
- struct bfd_link_hash_entry *base;
-
- if (!bfd_link_executable (info))
- return;
-
- htab = elf_i386_hash_table (info);
- if (htab == NULL)
- return;
-
- base = htab->tls_module_base;
- if (base == NULL)
- return;
-
- base->u.def.value = htab->elf.tls_size;
-}
-
-/* Return the base VMA address which should be subtracted from real addresses
- when resolving @dtpoff relocation.
- This is PT_TLS segment p_vaddr. */
-
-static bfd_vma
-elf_i386_dtpoff_base (struct bfd_link_info *info)
-{
- /* If tls_sec is NULL, we should have signalled an error already. */
- if (elf_hash_table (info)->tls_sec == NULL)
- return 0;
- return elf_hash_table (info)->tls_sec->vma;
-}
-
/* Return the relocation value for @tpoff relocation
if STT_TLS virtual address is ADDRESS. */
Elf_Internal_Sym *local_syms,
asection **local_sections)
{
- struct elf_i386_link_hash_table *htab;
+ struct elf_x86_link_hash_table *htab;
Elf_Internal_Shdr *symtab_hdr;
struct elf_link_hash_entry **sym_hashes;
bfd_vma *local_got_offsets;
bfd_boolean is_vxworks_tls;
unsigned plt_entry_size;
- BFD_ASSERT (is_i386_elf (input_bfd));
-
/* Skip if check_relocs failed. */
if (input_section->check_relocs_failed)
return FALSE;
- htab = elf_i386_hash_table (info);
+ htab = elf_x86_hash_table (info, I386_ELF_DATA);
if (htab == NULL)
return FALSE;
+
+ if (!is_x86_elf (input_bfd, htab))
+ {
+ bfd_set_error (bfd_error_wrong_format);
+ return FALSE;
+ }
+
symtab_hdr = &elf_symtab_hdr (input_bfd);
sym_hashes = elf_sym_hashes (input_bfd);
local_got_offsets = elf_local_got_offsets (input_bfd);
- local_tlsdesc_gotents = elf_i386_local_tlsdesc_gotent (input_bfd);
+ local_tlsdesc_gotents = elf_x86_local_tlsdesc_gotent (input_bfd);
/* We have to handle relocations in vxworks .tls_vars sections
specially, because the dynamic loader is 'weird'. */
- is_vxworks_tls = (get_elf_i386_backend_data (output_bfd)->is_vxworks
- && bfd_link_pic (info)
+ is_vxworks_tls = (htab->target_os == is_vxworks
+ && bfd_link_pic (info)
&& !strcmp (input_section->output_section->name,
".tls_vars"));
- elf_i386_set_tls_module_base (info);
+ _bfd_x86_elf_set_tls_module_base (info);
- plt_entry_size = GET_PLT_ENTRY_SIZE (output_bfd);
+ plt_entry_size = htab->plt.plt_entry_size;
rel = wrel = relocs;
relend = relocs + input_section->reloc_count;
for (; rel < relend; wrel++, rel++)
{
- unsigned int r_type;
+ unsigned int r_type, r_type_tls;
reloc_howto_type *howto;
unsigned long r_symndx;
struct elf_link_hash_entry *h;
- struct elf_i386_link_hash_entry *eh;
+ struct elf_x86_link_hash_entry *eh;
Elf_Internal_Sym *sym;
asection *sec;
bfd_vma off, offplt, plt_offset;
continue;
}
- 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_tls_offset) - R_386_ext
- >= R_386_ext2 - R_386_ext))
- {
- _bfd_error_handler
- /* xgettext:c-format */
- (_("%B: unrecognized relocation (0x%x) in section `%A'"),
- input_bfd, r_type, input_section);
- bfd_set_error (bfd_error_bad_value);
- return FALSE;
- }
- howto = elf_howto_table + indx;
+ howto = elf_i386_rtype_to_howto (r_type);
+ if (howto == NULL)
+ return _bfd_unrecognized_reloc (input_bfd, input_section, r_type);
r_symndx = ELF32_R_SYM (rel->r_info);
h = NULL;
&& ELF32_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
{
/* Relocate against local STT_GNU_IFUNC symbol. */
- h = elf_i386_get_local_sym_hash (htab, input_bfd, rel,
- FALSE);
+ h = _bfd_elf_x86_get_local_sym_hash (htab, input_bfd, rel,
+ FALSE);
if (h == NULL)
abort ();
if (sec != NULL && discarded_section (sec))
{
_bfd_clear_contents (howto, input_bfd, input_section,
- contents + rel->r_offset);
+ contents, rel->r_offset);
wrel->r_offset = rel->r_offset;
wrel->r_info = 0;
wrel->r_addend = 0;
continue;
}
+ eh = (struct elf_x86_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, *gotplt, *base_got;
+ asection *gotplt, *base_got;
bfd_vma plt_index;
const char *name;
if ((input_section->flags & SEC_ALLOC) == 0)
{
+ /* If this is a SHT_NOTE section without SHF_ALLOC, treat
+ STT_GNU_IFUNC symbol as STT_FUNC. */
+ if (elf_section_type (input_section) == SHT_NOTE)
+ goto skip_ifunc;
/* Dynamic relocs are not propagated for SEC_DEBUGGING
sections because such sections are not SEC_ALLOC and
thus ld.so will not process them. */
/* STT_GNU_IFUNC symbol must go through PLT. */
if (htab->elf.splt != NULL)
{
- plt = htab->elf.splt;
+ if (htab->plt_second != NULL)
+ {
+ resolved_plt = htab->plt_second;
+ plt_offset = eh->plt_second.offset;
+ }
+ else
+ {
+ resolved_plt = htab->elf.splt;
+ plt_offset = h->plt.offset;
+ }
gotplt = htab->elf.sgotplt;
}
else
{
- plt = htab->elf.iplt;
+ resolved_plt = htab->elf.iplt;
+ plt_offset = h->plt.offset;
gotplt = htab->elf.igotplt;
}
if (htab->elf.splt != NULL)
{
- plt_index = h->plt.offset / plt_entry_size - 1;
+ plt_index = (h->plt.offset / plt_entry_size
+ - htab->plt.has_plt0);
off = (plt_index + 3) * 4;
base_got = htab->elf.sgotplt;
}
goto bad_ifunc_reloc;
}
- relocation = (plt->output_section->vma
- + plt->output_offset + h->plt.offset);
+ relocation = (resolved_plt->output_section->vma
+ + resolved_plt->output_offset + plt_offset);
switch (r_type)
{
NULL);
_bfd_error_handler
/* xgettext:c-format */
- (_("%B: relocation %s against STT_GNU_IFUNC "
+ (_("%pB: relocation %s against STT_GNU_IFUNC "
"symbol `%s' isn't supported"), input_bfd,
howto->name, name);
bfd_set_error (bfd_error_bad_value);
+ input_section->output_offset
+ offset);
- if (h->dynindx == -1
- || h->forced_local
- || bfd_link_executable (info))
+ if (POINTER_LOCAL_IFUNC_P (info, h))
{
+ info->callbacks->minfo (_("Local IFUNC function `%s' in %pB\n"),
+ h->root.root.string,
+ h->root.u.def.section->owner);
+
/* This symbol is resolved locally. */
outrel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
bfd_put_32 (output_bfd,
}
}
- eh = (struct elf_i386_link_hash_entry *) h;
+skip_ifunc:
resolved_to_zero = (eh != NULL
- && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
- eh->has_got_reloc,
- eh));
+ && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh));
switch (r_type)
{
case R_386_GOT32X:
- /* Avoid optimizing _DYNAMIC since ld.so may use its
- link-time address. */
- if (h == htab->elf.hdynamic)
- goto r_386_got32;
-
- if (bfd_link_pic (info))
- {
- /* It is OK to convert mov to lea and convert indirect
- branch to direct branch. It is OK to convert adc,
- add, and, cmp, or, sbb, sub, test, xor only when PIC
- is false. */
- unsigned int opcode, addend;
- addend = bfd_get_32 (input_bfd, contents + rel->r_offset);
- if (addend != 0)
- goto r_386_got32;
- opcode = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
- if (opcode != 0x8b && opcode != 0xff)
- goto r_386_got32;
- }
-
- /* Resolve "mov GOT[(%reg)], %reg",
- "call/jmp *GOT[(%reg)]", "test %reg, foo@GOT[(%reg)]"
- and "binop foo@GOT[(%reg)], %reg". */
- if (h == NULL
- || (h->plt.offset == (bfd_vma) -1
- && h->got.offset == (bfd_vma) -1)
- || htab->elf.sgotplt == NULL)
- abort ();
-
- offplt = (htab->elf.sgotplt->output_section->vma
- + htab->elf.sgotplt->output_offset);
-
- /* It is relative to .got.plt section. */
- if (h->got.offset != (bfd_vma) -1)
- /* Use GOT entry. Mask off the least significant bit in
- GOT offset which may be set by R_386_GOT32 processing
- below. */
- relocation = (htab->elf.sgot->output_section->vma
- + htab->elf.sgot->output_offset
- + (h->got.offset & ~1) - offplt);
- else
- /* Use GOTPLT entry. */
- relocation = (h->plt.offset / plt_entry_size - 1 + 3) * 4;
-
- if (!bfd_link_pic (info))
- {
- /* If not PIC, add the .got.plt section address for
- baseless addressing. */
- unsigned int modrm;
- modrm = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
- if ((modrm & 0xc7) == 0x5)
- relocation += offplt;
- }
-
- unresolved_reloc = FALSE;
- break;
-
case R_386_GOT32:
-r_386_got32:
/* Relocation is to the entry for this symbol in the global
offset table. */
if (htab->elf.sgot == NULL)
relative_reloc = FALSE;
if (h != NULL)
{
- bfd_boolean dyn;
-
off = h->got.offset;
- dyn = htab->elf.dynamic_sections_created;
- if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
- bfd_link_pic (info),
- h)
- || (bfd_link_pic (info)
- && SYMBOL_REFERENCES_LOCAL (info, h))
- || (ELF_ST_VISIBILITY (h->other)
- && h->root.type == bfd_link_hash_undefweak))
+ if (RESOLVED_LOCALLY_P (info, h, htab))
{
- /* 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.
+ /* 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
htab->elf.sgot->contents + off);
h->got.offset |= 1;
- if (h->dynindx == -1
- && !h->forced_local
- && h->root.type != bfd_link_hash_undefweak
- && bfd_link_pic (info))
+ if (GENERATE_RELATIVE_RELOC_P (info, h))
{
/* PR ld/21402: If this symbol isn't dynamic
in PIC, generate R_386_RELATIVE here. */
_bfd_error_handler
/* xgettext:c-format */
- (_("%B: direct GOT relocation %s against `%s'"
+ (_("%pB: direct GOT relocation %s against `%s'"
" without base register can not be used"
" when making a shared object"),
input_bfd, howto->name, name);
_bfd_error_handler
/* xgettext:c-format */
- (_("%B: relocation R_386_GOTOFF against undefined %s"
+ (_("%pB: relocation R_386_GOTOFF against undefined %s"
" `%s' can not be used when making a shared object"),
input_bfd, v, h->root.root.string);
bfd_set_error (bfd_error_bad_value);
return FALSE;
}
- else if (!SYMBOL_REFERENCES_LOCAL (info, h)
+ else if (!SYMBOL_REFERENCES_LOCAL_P (info, h)
&& (h->type == STT_FUNC
|| h->type == STT_OBJECT)
&& ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
{
_bfd_error_handler
/* xgettext:c-format */
- (_("%B: relocation R_386_GOTOFF against protected %s"
+ (_("%pB: relocation R_386_GOTOFF against protected %s"
" `%s' can not be used when making a shared object"),
input_bfd,
h->type == STT_FUNC ? "function" : "data",
if (h->plt.offset != (bfd_vma) -1)
{
- resolved_plt = htab->elf.splt;
- plt_offset = h->plt.offset;
+ if (htab->plt_second != NULL)
+ {
+ resolved_plt = htab->plt_second;
+ plt_offset = eh->plt_second.offset;
+ }
+ else
+ {
+ resolved_plt = htab->elf.splt;
+ plt_offset = h->plt.offset;
+ }
}
else
{
|| is_vxworks_tls)
break;
- /* Copy dynamic function pointer relocations. Don't generate
- dynamic relocations against resolved undefined weak symbols
- in PIE, except for R_386_PC32. */
- if ((bfd_link_pic (info)
- && (h == NULL
- || ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
- && (!resolved_to_zero
- || r_type == R_386_PC32))
- || h->root.type != bfd_link_hash_undefweak))
- && ((r_type != R_386_PC32 && r_type != R_386_SIZE32)
- || !SYMBOL_CALLS_LOCAL (info, h)))
- || (ELIMINATE_COPY_RELOCS
- && !bfd_link_pic (info)
- && h != NULL
- && h->dynindx != -1
- && (!h->non_got_ref
- || eh->func_pointer_refcount > 0
- || (h->root.type == bfd_link_hash_undefweak
- && !resolved_to_zero))
- && ((h->def_dynamic && !h->def_regular)
- /* Undefined weak symbol is bound locally when
- PIC is false. */
- || h->root.type == bfd_link_hash_undefweak)))
+ if (GENERATE_DYNAMIC_RELOCATION_P (info, eh, r_type,
+ FALSE, resolved_to_zero,
+ (r_type == R_386_PC32)))
{
Elf_Internal_Rela outrel;
bfd_boolean skip, relocate;
if (skip)
memset (&outrel, 0, sizeof outrel);
- else if (h != NULL
- && h->dynindx != -1
- && (r_type == R_386_PC32
- || !(bfd_link_executable (info)
- || SYMBOLIC_BIND (info, h))
- || !h->def_regular))
+ else if (COPY_INPUT_RELOC_P (info, h, r_type))
outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
else
{
case R_386_TLS_GOTIE:
tls_type = GOT_UNKNOWN;
if (h == NULL && local_got_offsets)
- tls_type = elf_i386_local_got_tls_type (input_bfd) [r_symndx];
+ tls_type = elf_x86_local_got_tls_type (input_bfd) [r_symndx];
else if (h != NULL)
- tls_type = elf_i386_hash_entry(h)->tls_type;
+ tls_type = elf_x86_hash_entry(h)->tls_type;
if (tls_type == GOT_TLS_IE)
tls_type = GOT_TLS_IE_NEG;
+ r_type_tls = r_type;
if (! elf_i386_tls_transition (info, input_bfd,
input_section, contents,
symtab_hdr, sym_hashes,
- &r_type, tls_type, rel,
+ &r_type_tls, tls_type, rel,
relend, h, r_symndx, TRUE))
return FALSE;
- if (r_type == R_386_TLS_LE_32)
+ if (r_type_tls == R_386_TLS_LE_32)
{
BFD_ASSERT (! unresolved_reloc);
- if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
+ if (r_type == R_386_TLS_GD)
{
unsigned int type;
bfd_vma roff;
wrel++;
continue;
}
- else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
+ else if (r_type == R_386_TLS_GOTDESC)
{
/* GDesc -> LE transition.
It's originally something like:
contents + roff);
continue;
}
- else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
+ else if (r_type == R_386_TLS_DESC_CALL)
{
/* GDesc -> LE transition.
It's originally:
bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
continue;
}
- else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_IE)
+ else if (r_type == R_386_TLS_IE)
{
unsigned int val;
}
else
BFD_FAIL ();
- if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTIE)
+ if (r_type == R_386_TLS_GOTIE)
bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
contents + rel->r_offset);
else
if (h != NULL)
{
off = h->got.offset;
- offplt = elf_i386_hash_entry (h)->tlsdesc_got;
+ offplt = elf_x86_hash_entry (h)->tlsdesc_got;
}
else
{
{
BFD_ASSERT (! unresolved_reloc);
bfd_put_32 (output_bfd,
- relocation - elf_i386_dtpoff_base (info),
+ relocation - _bfd_x86_elf_dtpoff_base (info),
htab->elf.sgotplt->contents + offplt
+ htab->sgotplt_jump_table_size + 4);
}
if (dr_type == R_386_TLS_TPOFF && indx == 0)
bfd_put_32 (output_bfd,
- relocation - elf_i386_dtpoff_base (info),
+ relocation - _bfd_x86_elf_dtpoff_base (info),
htab->elf.sgot->contents + off);
else if (dr_type == R_386_TLS_TPOFF32 && indx == 0)
bfd_put_32 (output_bfd,
- elf_i386_dtpoff_base (info) - relocation,
+ _bfd_x86_elf_dtpoff_base (info) - relocation,
htab->elf.sgot->contents + off);
else if (dr_type != R_386_TLS_DESC)
bfd_put_32 (output_bfd, 0,
{
if (indx == 0)
{
- BFD_ASSERT (! unresolved_reloc);
+ BFD_ASSERT (! unresolved_reloc);
bfd_put_32 (output_bfd,
- relocation - elf_i386_dtpoff_base (info),
+ relocation - _bfd_x86_elf_dtpoff_base (info),
htab->elf.sgot->contents + off + 4);
}
else
{
bfd_put_32 (output_bfd,
(indx == 0
- ? relocation - elf_i386_dtpoff_base (info)
+ ? relocation - _bfd_x86_elf_dtpoff_base (info)
: 0),
htab->elf.sgot->contents + off + 4);
outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
if (off >= (bfd_vma) -2
&& ! GOT_TLS_GDESC_P (tls_type))
abort ();
- if (r_type == R_386_TLS_GOTDESC
- || r_type == R_386_TLS_DESC_CALL)
+ if (r_type_tls == R_386_TLS_GOTDESC
+ || r_type_tls == R_386_TLS_DESC_CALL)
{
relocation = htab->sgotplt_jump_table_size + offplt;
unresolved_reloc = FALSE;
}
- else if (r_type == ELF32_R_TYPE (rel->r_info))
+ else if (r_type_tls == r_type)
{
bfd_vma g_o_t = htab->elf.sgotplt->output_section->vma
+ htab->elf.sgotplt->output_offset;
relocation += g_o_t;
unresolved_reloc = FALSE;
}
- else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
+ else if (r_type == R_386_TLS_GD)
{
unsigned int val, type;
bfd_vma roff;
wrel++;
continue;
}
- else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
+ else if (r_type == R_386_TLS_GOTDESC)
{
/* GDesc -> IE transition.
It's originally something like:
contents + roff);
continue;
}
- else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
+ else if (r_type == R_386_TLS_DESC_CALL)
{
/* GDesc -> IE transition.
It's originally:
if (htab->elf.sgot == NULL)
abort ();
- off = htab->tls_ldm_got.offset;
+ off = htab->tls_ld_or_ldm_got.offset;
if (off & 1)
off &= ~1;
else
htab->elf.sgot->contents + off + 4);
outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32);
elf_append_rel (output_bfd, htab->elf.srelgot, &outrel);
- htab->tls_ldm_got.offset |= 1;
+ htab->tls_ld_or_ldm_got.offset |= 1;
}
relocation = htab->elf.sgot->output_section->vma
+ htab->elf.sgot->output_offset + off
case R_386_TLS_LDO_32:
if (!bfd_link_executable (info)
|| (input_section->flags & SEC_CODE) == 0)
- relocation -= elf_i386_dtpoff_base (info);
+ relocation -= _bfd_x86_elf_dtpoff_base (info);
else
/* When converting LDO to LE, we must negate. */
relocation = -elf_i386_tpoff (info, relocation);
if (indx)
continue;
else if (r_type == R_386_TLS_LE_32)
- relocation = elf_i386_dtpoff_base (info) - relocation;
+ relocation = _bfd_x86_elf_dtpoff_base (info) - relocation;
else
- relocation -= elf_i386_dtpoff_base (info);
+ relocation -= _bfd_x86_elf_dtpoff_base (info);
}
else if (r_type == R_386_TLS_LE_32)
relocation = elf_i386_tpoff (info, relocation);
{
_bfd_error_handler
/* xgettext:c-format */
- (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
+ (_("%pB(%pA+%#" PRIx64 "): unresolvable %s relocation against symbol `%s'"),
input_bfd,
input_section,
- (long) rel->r_offset,
+ (uint64_t) rel->r_offset,
howto->name,
h->root.root.string);
return FALSE;
if (name == NULL)
return FALSE;
if (*name == '\0')
- name = bfd_section_name (input_bfd, sec);
+ name = bfd_section_name (sec);
}
if (r == bfd_reloc_overflow)
{
_bfd_error_handler
/* xgettext:c-format */
- (_("%B(%A+0x%lx): reloc against `%s': error %d"),
+ (_("%pB(%pA+%#" PRIx64 "): reloc against `%s': error %d"),
input_bfd, input_section,
- (long) rel->r_offset, name, (int) r);
+ (uint64_t) rel->r_offset, name, (int) r);
return FALSE;
}
}
struct elf_link_hash_entry *h,
Elf_Internal_Sym *sym)
{
- struct elf_i386_link_hash_table *htab;
+ struct elf_x86_link_hash_table *htab;
unsigned plt_entry_size;
- const struct elf_i386_backend_data *abed;
- struct elf_i386_link_hash_entry *eh;
+ struct elf_x86_link_hash_entry *eh;
bfd_boolean local_undefweak;
+ bfd_boolean use_plt_second;
- htab = elf_i386_hash_table (info);
+ htab = elf_x86_hash_table (info, I386_ELF_DATA);
if (htab == NULL)
return FALSE;
- abed = get_elf_i386_backend_data (output_bfd);
- plt_entry_size = GET_PLT_ENTRY_SIZE (output_bfd);
+ plt_entry_size = htab->plt.plt_entry_size;
- eh = (struct elf_i386_link_hash_entry *) h;
+ /* Use the second PLT section only if there is .plt section. */
+ use_plt_second = htab->elf.splt != NULL && htab->plt_second != NULL;
+
+ eh = (struct elf_x86_link_hash_entry *) h;
if (eh->no_finish_dynamic_symbol)
abort ();
/* We keep PLT/GOT entries without dynamic PLT/GOT relocations for
resolved undefined weak symbols in executable so that their
references have value 0 at run-time. */
- local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
- eh->has_got_reloc,
- eh);
+ local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh);
if (h->plt.offset != (bfd_vma) -1)
{
- bfd_vma plt_index;
+ bfd_vma plt_index, plt_offset;
bfd_vma got_offset;
Elf_Internal_Rela rel;
bfd_byte *loc;
- asection *plt, *gotplt, *relplt;
+ asection *plt, *resolved_plt, *gotplt, *relplt;
/* When building a static executable, use .iplt, .igot.plt and
.rel.iplt sections for STT_GNU_IFUNC symbols. */
relplt = htab->elf.irelplt;
}
- /* This symbol has an entry in the procedure linkage table. Set
- it up. */
-
- if ((h->dynindx == -1
- && !local_undefweak
- && !((h->forced_local || bfd_link_executable (info))
- && h->def_regular
- && h->type == STT_GNU_IFUNC))
- || plt == NULL
- || gotplt == NULL
- || relplt == NULL)
- abort ();
+ VERIFY_PLT_ENTRY (info, h, plt, gotplt, relplt, local_undefweak)
/* 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)
{
- got_offset = h->plt.offset / plt_entry_size - 1;
+ got_offset = (h->plt.offset / plt_entry_size
+ - htab->plt.has_plt0);
got_offset = (got_offset + 3) * 4;
}
else
got_offset = got_offset * 4;
}
- /* Fill in the entry in the procedure linkage table. */
+ /* Fill in the entry in the procedure linkage table and update
+ the first slot. */
+ memcpy (plt->contents + h->plt.offset, htab->plt.plt_entry,
+ plt_entry_size);
+
+ if (use_plt_second)
+ {
+ const bfd_byte *plt_entry;
+ if (bfd_link_pic (info))
+ plt_entry = htab->non_lazy_plt->pic_plt_entry;
+ else
+ plt_entry = htab->non_lazy_plt->plt_entry;
+ memcpy (htab->plt_second->contents + eh->plt_second.offset,
+ plt_entry, htab->non_lazy_plt->plt_entry_size);
+
+ resolved_plt = htab->plt_second;
+ plt_offset = eh->plt_second.offset;
+ }
+ else
+ {
+ resolved_plt = plt;
+ plt_offset = h->plt.offset;
+ }
+
if (! bfd_link_pic (info))
{
- memcpy (plt->contents + h->plt.offset, abed->plt->plt_entry,
- abed->plt->plt_entry_size);
bfd_put_32 (output_bfd,
(gotplt->output_section->vma
+ gotplt->output_offset
+ got_offset),
- plt->contents + h->plt.offset
- + abed->plt->plt_got_offset);
+ resolved_plt->contents + plt_offset
+ + htab->plt.plt_got_offset);
- if (abed->is_vxworks)
+ if (htab->target_os == is_vxworks)
{
int s, k, reloc_index;
for this PLT entry. */
/* S: Current slot number (zero-based). */
- s = ((h->plt.offset - abed->plt->plt_entry_size)
- / abed->plt->plt_entry_size);
+ s = ((h->plt.offset - htab->plt.plt_entry_size)
+ / htab->plt.plt_entry_size);
/* K: Number of relocations for PLTResolve. */
if (bfd_link_pic (info))
k = PLTRESOLVE_RELOCS_SHLIB;
loc = (htab->srelplt2->contents + reloc_index
* sizeof (Elf32_External_Rel));
- rel.r_offset = (htab->elf.splt->output_section->vma
- + htab->elf.splt->output_offset
+ rel.r_offset = (plt->output_section->vma
+ + plt->output_offset
+ h->plt.offset + 2),
rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
}
else
{
- memcpy (plt->contents + h->plt.offset, abed->plt->pic_plt_entry,
- abed->plt->plt_entry_size);
bfd_put_32 (output_bfd, got_offset,
- plt->contents + h->plt.offset
- + abed->plt->plt_got_offset);
+ resolved_plt->contents + plt_offset
+ + htab->plt.plt_got_offset);
}
/* Fill in the entry in the global offset table. Leave the entry
against undefined weak symbol in PIE. */
if (!local_undefweak)
{
- bfd_put_32 (output_bfd,
- (plt->output_section->vma
- + plt->output_offset
- + h->plt.offset
- + abed->plt->plt_lazy_offset),
- gotplt->contents + got_offset);
+ if (htab->plt.has_plt0)
+ bfd_put_32 (output_bfd,
+ (plt->output_section->vma
+ + plt->output_offset
+ + h->plt.offset
+ + htab->lazy_plt->plt_lazy_offset),
+ gotplt->contents + got_offset);
/* Fill in the entry in the .rel.plt section. */
rel.r_offset = (gotplt->output_section->vma
+ gotplt->output_offset
+ got_offset);
- if (h->dynindx == -1
- || ((bfd_link_executable (info)
- || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
- && h->def_regular
- && h->type == STT_GNU_IFUNC))
+ if (PLT_LOCAL_IFUNC_P (info, h))
{
+ info->callbacks->minfo (_("Local IFUNC function `%s' in %pB\n"),
+ h->root.root.string,
+ h->root.u.def.section->owner);
+
/* If an STT_GNU_IFUNC symbol is locally defined, generate
R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
in the .got.plt section. */
loc = relplt->contents + plt_index * sizeof (Elf32_External_Rel);
bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
- /* Don't fill PLT entry for static executables. */
- if (plt == htab->elf.splt)
+ /* Don't fill the second and third slots in PLT entry for
+ static executables nor without PLT0. */
+ if (plt == htab->elf.splt && htab->plt.has_plt0)
{
bfd_put_32 (output_bfd,
plt_index * sizeof (Elf32_External_Rel),
plt->contents + h->plt.offset
- + abed->plt->plt_reloc_offset);
- bfd_put_32 (output_bfd, - (h->plt.offset
- + abed->plt->plt_plt_offset + 4),
- plt->contents + h->plt.offset
- + abed->plt->plt_plt_offset);
+ + htab->lazy_plt->plt_reloc_offset);
+ bfd_put_32 (output_bfd,
+ - (h->plt.offset
+ + htab->lazy_plt->plt_plt_offset + 4),
+ (plt->contents + h->plt.offset
+ + htab->lazy_plt->plt_plt_offset));
}
}
}
asection *plt, *got, *gotplt;
const bfd_byte *got_plt_entry;
- /* Offset of displacement of the indirect jump. */
- bfd_vma plt_got_offset = 2;
-
/* Set the entry in the GOT procedure linkage table. */
plt = htab->plt_got;
got = htab->elf.sgot;
/* Fill in the entry in the GOT procedure linkage table. */
if (! bfd_link_pic (info))
{
- got_plt_entry = elf_i386_got_plt_entry;
+ got_plt_entry = htab->non_lazy_plt->plt_entry;
got_offset += got->output_section->vma + got->output_offset;
}
else
{
- got_plt_entry = elf_i386_pic_got_plt_entry;
+ got_plt_entry = htab->non_lazy_plt->pic_plt_entry;
got_offset += (got->output_section->vma
+ got->output_offset
- gotplt->output_section->vma
plt_offset = eh->plt_got.offset;
memcpy (plt->contents + plt_offset, got_plt_entry,
- sizeof (elf_i386_got_plt_entry));
+ htab->non_lazy_plt->plt_entry_size);
bfd_put_32 (output_bfd, got_offset,
- plt->contents + plt_offset + plt_got_offset);
+ (plt->contents + plt_offset
+ + htab->non_lazy_plt->plt_got_offset));
}
if (!local_undefweak
sym->st_value = 0;
}
+ _bfd_x86_elf_link_fixup_ifunc_symbol (info, htab, h, sym);
+
/* Don't generate dynamic GOT relocation against undefined weak
symbol in executable. */
if (h->got.offset != (bfd_vma) -1
- && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h)->tls_type)
- && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE) == 0
+ && ! GOT_TLS_GD_ANY_P (elf_x86_hash_entry(h)->tls_type)
+ && (elf_x86_hash_entry(h)->tls_type & GOT_TLS_IE) == 0
&& !local_undefweak)
{
Elf_Internal_Rela rel;
in static executable. */
relgot = htab->elf.irelplt;
}
- if (SYMBOL_REFERENCES_LOCAL (info, h))
+ if (SYMBOL_REFERENCES_LOCAL_P (info, h))
{
+ info->callbacks->minfo (_("Local IFUNC function `%s' in %pB\n"),
+ h->root.root.string,
+ h->root.u.def.section->owner);
+
bfd_put_32 (output_bfd,
(h->root.u.def.value
+ h->root.u.def.section->output_section->vma
else
{
asection *plt;
+ bfd_vma plt_offset;
if (!h->pointer_equality_needed)
abort ();
/* For non-shared object, we can't use .got.plt, which
contains the real function addres if we need pointer
equality. We load the GOT entry with the PLT entry. */
- plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
+ if (htab->plt_second != NULL)
+ {
+ plt = htab->plt_second;
+ plt_offset = eh->plt_second.offset;
+ }
+ else
+ {
+ plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
+ plt_offset = h->plt.offset;
+ }
bfd_put_32 (output_bfd,
(plt->output_section->vma
- + plt->output_offset + h->plt.offset),
+ + plt->output_offset + plt_offset),
htab->elf.sgot->contents + h->got.offset);
return TRUE;
}
}
else if (bfd_link_pic (info)
- && SYMBOL_REFERENCES_LOCAL (info, h))
+ && SYMBOL_REFERENCES_LOCAL_P (info, h))
{
BFD_ASSERT((h->got.offset & 1) != 0);
rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
asection *s;
/* 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->elf.srelbss == NULL
- || htab->elf.sreldynrelro == NULL)
- abort ();
+ VERIFY_COPY_RELOC (h, htab)
rel.r_offset = (h->root.u.def.value
+ h->root.u.def.section->output_section->vma
return TRUE;
return elf_i386_finish_dynamic_symbol (info->output_bfd,
- info, h, NULL);
+ info, h, NULL);
}
/* Used to decide how to sort relocs in an optimal manner for the
&& htab->dynsym->contents != NULL)
{
/* Check relocation against STT_GNU_IFUNC symbol if there are
- dynamic symbols. */
+ dynamic symbols. */
unsigned long r_symndx = ELF32_R_SYM (rela->r_info);
if (r_symndx != STN_UNDEF)
{
elf_i386_finish_dynamic_sections (bfd *output_bfd,
struct bfd_link_info *info)
{
- struct elf_i386_link_hash_table *htab;
- bfd *dynobj;
- asection *sdyn;
- const struct elf_i386_backend_data *abed;
+ struct elf_x86_link_hash_table *htab;
- htab = elf_i386_hash_table (info);
+ htab = _bfd_x86_elf_finish_dynamic_sections (output_bfd, info);
if (htab == NULL)
return FALSE;
- dynobj = htab->elf.dynobj;
- sdyn = bfd_get_linker_section (dynobj, ".dynamic");
- abed = get_elf_i386_backend_data (output_bfd);
+ if (!htab->elf.dynamic_sections_created)
+ return TRUE;
- if (htab->elf.dynamic_sections_created)
+ if (htab->elf.splt && htab->elf.splt->size > 0)
{
- Elf32_External_Dyn *dyncon, *dynconend;
-
- if (sdyn == NULL || htab->elf.sgot == NULL)
- abort ();
-
- dyncon = (Elf32_External_Dyn *) sdyn->contents;
- dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
- for (; dyncon < dynconend; dyncon++)
- {
- Elf_Internal_Dyn dyn;
- asection *s;
-
- bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
-
- switch (dyn.d_tag)
- {
- default:
- if (abed->is_vxworks
- && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
- break;
- continue;
-
- case DT_PLTGOT:
- s = htab->elf.sgotplt;
- dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
- break;
-
- case DT_JMPREL:
- s = htab->elf.srelplt;
- dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
- break;
-
- case DT_PLTRELSZ:
- s = htab->elf.srelplt;
- dyn.d_un.d_val = s->size;
- break;
- }
-
- bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
- }
+ /* UnixWare sets the entsize of .plt to 4, although that doesn't
+ really seem like the right value. */
+ elf_section_data (htab->elf.splt->output_section)
+ ->this_hdr.sh_entsize = 4;
- if (htab->elf.splt && htab->elf.splt->size > 0)
+ if (htab->plt.has_plt0)
{
- /* UnixWare sets the entsize of .plt to 4, although that doesn't
- really seem like the right value. */
- elf_section_data (htab->elf.splt->output_section)
- ->this_hdr.sh_entsize = 4;
-
/* Fill in the special first entry in the procedure linkage
table. */
- if (bfd_link_pic (info))
- {
- memcpy (htab->elf.splt->contents, abed->plt->pic_plt0_entry,
- abed->plt->plt0_entry_size);
- memset (htab->elf.splt->contents + abed->plt->plt0_entry_size,
- abed->plt0_pad_byte,
- abed->plt->plt_entry_size - abed->plt->plt0_entry_size);
- }
- else
+ memcpy (htab->elf.splt->contents, htab->plt.plt0_entry,
+ htab->lazy_plt->plt0_entry_size);
+ memset (htab->elf.splt->contents + htab->lazy_plt->plt0_entry_size,
+ htab->plt0_pad_byte,
+ htab->plt.plt_entry_size - htab->lazy_plt->plt0_entry_size);
+ if (!bfd_link_pic (info))
{
- memcpy (htab->elf.splt->contents, abed->plt->plt0_entry,
- abed->plt->plt0_entry_size);
- memset (htab->elf.splt->contents + abed->plt->plt0_entry_size,
- abed->plt0_pad_byte,
- abed->plt->plt_entry_size - abed->plt->plt0_entry_size);
bfd_put_32 (output_bfd,
(htab->elf.sgotplt->output_section->vma
+ htab->elf.sgotplt->output_offset
+ 4),
htab->elf.splt->contents
- + abed->plt->plt0_got1_offset);
+ + htab->lazy_plt->plt0_got1_offset);
bfd_put_32 (output_bfd,
(htab->elf.sgotplt->output_section->vma
+ htab->elf.sgotplt->output_offset
+ 8),
htab->elf.splt->contents
- + abed->plt->plt0_got2_offset);
+ + htab->lazy_plt->plt0_got2_offset);
- if (abed->is_vxworks)
+ if (htab->target_os == is_vxworks)
{
Elf_Internal_Rela rel;
int num_plts = (htab->elf.splt->size
- / abed->plt->plt_entry_size) - 1;
+ / htab->plt.plt_entry_size) - 1;
unsigned char *p;
+ asection *srelplt2 = htab->srelplt2;
- /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4.
- On IA32 we use REL relocations so the addend goes in
- the PLT directly. */
+ /* Generate a relocation for _GLOBAL_OFFSET_TABLE_
+ + 4. On IA32 we use REL relocations so the
+ addend goes in the PLT directly. */
rel.r_offset = (htab->elf.splt->output_section->vma
+ htab->elf.splt->output_offset
- + abed->plt->plt0_got1_offset);
- rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
+ + htab->lazy_plt->plt0_got1_offset);
+ rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
+ R_386_32);
bfd_elf32_swap_reloc_out (output_bfd, &rel,
- htab->srelplt2->contents);
- /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
+ srelplt2->contents);
+ /* Generate a relocation for _GLOBAL_OFFSET_TABLE_
+ + 8. */
rel.r_offset = (htab->elf.splt->output_section->vma
+ htab->elf.splt->output_offset
- + abed->plt->plt0_got2_offset);
- rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
+ + htab->lazy_plt->plt0_got2_offset);
+ rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
+ R_386_32);
bfd_elf32_swap_reloc_out (output_bfd, &rel,
- htab->srelplt2->contents +
+ srelplt2->contents +
sizeof (Elf32_External_Rel));
-
/* Correct the .rel.plt.unloaded relocations. */
- p = htab->srelplt2->contents;
+ p = srelplt2->contents;
if (bfd_link_pic (info))
p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel);
else
}
}
- if (htab->elf.sgotplt)
- {
- if (bfd_is_abs_section (htab->elf.sgotplt->output_section))
- {
- _bfd_error_handler
- (_("discarded output section: `%A'"), htab->elf.sgotplt);
- return FALSE;
- }
-
- /* Fill in the first three entries in the global offset table. */
- if (htab->elf.sgotplt->size > 0)
- {
- bfd_put_32 (output_bfd,
- (sdyn == NULL ? 0
- : sdyn->output_section->vma + sdyn->output_offset),
- htab->elf.sgotplt->contents);
- bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 4);
- bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 8);
- }
-
- elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = 4;
- }
-
- /* Adjust .eh_frame for .plt section. */
- if (htab->plt_eh_frame != NULL
- && htab->plt_eh_frame->contents != NULL)
- {
- if (htab->elf.splt != NULL
- && htab->elf.splt->size != 0
- && (htab->elf.splt->flags & SEC_EXCLUDE) == 0
- && htab->elf.splt->output_section != NULL
- && htab->plt_eh_frame->output_section != NULL)
- {
- bfd_vma plt_start = htab->elf.splt->output_section->vma;
- bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma
- + htab->plt_eh_frame->output_offset
- + PLT_FDE_START_OFFSET;
- bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
- htab->plt_eh_frame->contents
- + PLT_FDE_START_OFFSET);
- }
- 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,
- htab->plt_eh_frame->contents))
- return FALSE;
- }
- }
-
- /* Adjust .eh_frame for .plt.got section. */
- if (htab->plt_got_eh_frame != NULL
- && htab->plt_got_eh_frame->contents != NULL)
- {
- if (htab->plt_got != NULL
- && htab->plt_got->size != 0
- && (htab->plt_got->flags & SEC_EXCLUDE) == 0
- && htab->plt_got->output_section != NULL
- && htab->plt_got_eh_frame->output_section != NULL)
- {
- bfd_vma plt_start = htab->plt_got->output_section->vma;
- bfd_vma eh_frame_start = htab->plt_got_eh_frame->output_section->vma
- + htab->plt_got_eh_frame->output_offset
- + PLT_FDE_START_OFFSET;
- bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
- htab->plt_got_eh_frame->contents
- + PLT_FDE_START_OFFSET);
- }
- if (htab->plt_got_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME)
- {
- if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
- htab->plt_got_eh_frame,
- htab->plt_got_eh_frame->contents))
- return FALSE;
- }
- }
-
- if (htab->elf.sgot && htab->elf.sgot->size > 0)
- elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4;
-
/* Fill PLT entries for undefined weak symbols in PIE. */
if (bfd_link_pie (info))
bfd_hash_traverse (&info->hash->table,
asection *,
struct elf_link_hash_entry *) ATTRIBUTE_UNUSED)
{
- struct elf_i386_link_hash_table *htab = elf_i386_hash_table (info);
+ struct elf_x86_link_hash_table *htab
+ = elf_x86_hash_table (info, I386_ELF_DATA);
if (htab == NULL)
return FALSE;
return TRUE;
}
-/* Return an array of PLT entry symbol values. */
+/* Forward declaration. */
+static const struct elf_x86_lazy_plt_layout elf_i386_nacl_plt;
-static bfd_vma *
-elf_i386_get_plt_sym_val (bfd *abfd, asymbol **dynsyms, asection *plt,
- asection *relplt)
+/* Similar to _bfd_elf_get_synthetic_symtab. Support PLTs with all
+ dynamic relocations. */
+
+static long
+elf_i386_get_synthetic_symtab (bfd *abfd,
+ long symcount ATTRIBUTE_UNUSED,
+ asymbol **syms ATTRIBUTE_UNUSED,
+ long dynsymcount,
+ asymbol **dynsyms,
+ asymbol **ret)
{
- bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
- arelent *p;
- long count, i;
- bfd_vma *plt_sym_val;
- bfd_vma plt_offset;
+ long count, i, n;
+ int j;
bfd_byte *plt_contents;
- const struct elf_i386_backend_data *bed
- = get_elf_i386_backend_data (abfd);
- Elf_Internal_Shdr *hdr;
-
- /* Get the .plt section contents. */
- plt_contents = (bfd_byte *) bfd_malloc (plt->size);
- if (plt_contents == NULL)
- return NULL;
- if (!bfd_get_section_contents (abfd, (asection *) plt,
- plt_contents, 0, plt->size))
+ long relsize;
+ const struct elf_x86_lazy_plt_layout *lazy_plt;
+ const struct elf_x86_non_lazy_plt_layout *non_lazy_plt;
+ const struct elf_x86_lazy_plt_layout *lazy_ibt_plt;
+ const struct elf_x86_non_lazy_plt_layout *non_lazy_ibt_plt;
+ asection *plt;
+ bfd_vma got_addr;
+ enum elf_x86_plt_type plt_type;
+ struct elf_x86_plt plts[] =
{
-bad_return:
- free (plt_contents);
- return NULL;
- }
+ { ".plt", NULL, NULL, plt_unknown, 0, 0, 0, 0 },
+ { ".plt.got", NULL, NULL, plt_non_lazy, 0, 0, 0, 0 },
+ { ".plt.sec", NULL, NULL, plt_second, 0, 0, 0, 0 },
+ { NULL, NULL, NULL, plt_non_lazy, 0, 0, 0, 0 }
+ };
- slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
- if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
- goto bad_return;
+ *ret = NULL;
- hdr = &elf_section_data (relplt)->this_hdr;
- count = relplt->size / hdr->sh_entsize;
+ if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
+ return 0;
- plt_sym_val = (bfd_vma *) bfd_malloc (sizeof (bfd_vma) * count);
- if (plt_sym_val == NULL)
- goto bad_return;
+ if (dynsymcount <= 0)
+ return 0;
- for (i = 0; i < count; i++)
- plt_sym_val[i] = -1;
+ relsize = bfd_get_dynamic_reloc_upper_bound (abfd);
+ if (relsize <= 0)
+ return -1;
- plt_offset = bed->plt->plt_entry_size;
- p = relplt->relocation;
- for (i = 0; i < count; i++, p++)
+ non_lazy_plt = NULL;
+ /* Silence GCC 6. */
+ lazy_plt = NULL;
+ non_lazy_ibt_plt = NULL;
+ lazy_ibt_plt = NULL;
+ switch (get_elf_x86_backend_data (abfd)->target_os)
{
- long reloc_index;
+ case is_normal:
+ case is_solaris:
+ non_lazy_plt = &elf_i386_non_lazy_plt;
+ lazy_ibt_plt = &elf_i386_lazy_ibt_plt;
+ non_lazy_ibt_plt = &elf_i386_non_lazy_ibt_plt;
+ /* Fall through */
+ case is_vxworks:
+ lazy_plt = &elf_i386_lazy_plt;
+ break;
+ case is_nacl:
+ lazy_plt = &elf_i386_nacl_plt;
+ break;
+ }
- /* Skip unknown relocation. PR 17512: file: bc9d6cf5. */
- if (p->howto == NULL)
- continue;
+ got_addr = 0;
- if (p->howto->type != R_386_JUMP_SLOT
- && p->howto->type != R_386_IRELATIVE)
+ count = 0;
+ for (j = 0; plts[j].name != NULL; j++)
+ {
+ plt = bfd_get_section_by_name (abfd, plts[j].name);
+ if (plt == NULL || plt->size == 0)
continue;
- reloc_index = H_GET_32 (abfd, (plt_contents + plt_offset
- + bed->plt->plt_reloc_offset));
- reloc_index /= sizeof (Elf32_External_Rel);
- if (reloc_index < count)
- plt_sym_val[reloc_index] = plt->vma + plt_offset;
-
- plt_offset += bed->plt->plt_entry_size;
-
- /* PR binutils/18437: Skip extra relocations in the .rel.plt
- section. */
- if (plt_offset >= plt->size)
+ /* Get the PLT section contents. */
+ plt_contents = (bfd_byte *) bfd_malloc (plt->size);
+ if (plt_contents == NULL)
break;
- }
-
- free (plt_contents);
-
- return plt_sym_val;
-}
-
-/* Similar to _bfd_elf_get_synthetic_symtab. */
+ if (!bfd_get_section_contents (abfd, (asection *) plt,
+ plt_contents, 0, plt->size))
+ {
+ free (plt_contents);
+ break;
+ }
-static long
-elf_i386_get_synthetic_symtab (bfd *abfd,
- long symcount,
- asymbol **syms,
- long dynsymcount,
- asymbol **dynsyms,
- asymbol **ret)
-{
- asection *plt = bfd_get_section_by_name (abfd, ".plt");
- return _bfd_elf_ifunc_get_synthetic_symtab (abfd, symcount, syms,
- dynsymcount, dynsyms, ret,
- plt,
- elf_i386_get_plt_sym_val);
-}
+ /* Check what kind of PLT it is. */
+ plt_type = plt_unknown;
+ if (plts[j].type == plt_unknown
+ && (plt->size >= (lazy_plt->plt0_entry_size
+ + lazy_plt->plt_entry_size)))
+ {
+ /* Match lazy PLT first. */
+ if (memcmp (plt_contents, lazy_plt->plt0_entry,
+ lazy_plt->plt0_got1_offset) == 0)
+ {
+ /* The fist entry in the lazy IBT PLT is the same as the
+ normal lazy PLT. */
+ if (lazy_ibt_plt != NULL
+ && (memcmp (plt_contents + lazy_ibt_plt->plt0_entry_size,
+ lazy_ibt_plt->plt_entry,
+ lazy_ibt_plt->plt_got_offset) == 0))
+ plt_type = plt_lazy | plt_second;
+ else
+ plt_type = plt_lazy;
+ }
+ else if (memcmp (plt_contents, lazy_plt->pic_plt0_entry,
+ lazy_plt->plt0_got1_offset) == 0)
+ {
+ /* The fist entry in the PIC lazy IBT PLT is the same as
+ the normal PIC lazy PLT. */
+ if (lazy_ibt_plt != NULL
+ && (memcmp (plt_contents + lazy_ibt_plt->plt0_entry_size,
+ lazy_ibt_plt->pic_plt_entry,
+ lazy_ibt_plt->plt_got_offset) == 0))
+ plt_type = plt_lazy | plt_pic | plt_second;
+ else
+ plt_type = plt_lazy | plt_pic;
+ }
+ }
-/* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
+ if (non_lazy_plt != NULL
+ && (plt_type == plt_unknown || plt_type == plt_non_lazy)
+ && plt->size >= non_lazy_plt->plt_entry_size)
+ {
+ /* Match non-lazy PLT. */
+ if (memcmp (plt_contents, non_lazy_plt->plt_entry,
+ non_lazy_plt->plt_got_offset) == 0)
+ plt_type = plt_non_lazy;
+ else if (memcmp (plt_contents, non_lazy_plt->pic_plt_entry,
+ non_lazy_plt->plt_got_offset) == 0)
+ plt_type = plt_pic;
+ }
-static bfd_boolean
-elf_i386_hash_symbol (struct elf_link_hash_entry *h)
-{
- if (h->plt.offset != (bfd_vma) -1
- && !h->def_regular
- && !h->pointer_equality_needed)
- return FALSE;
+ if ((non_lazy_ibt_plt != NULL)
+ && (plt_type == plt_unknown || plt_type == plt_second)
+ && plt->size >= non_lazy_ibt_plt->plt_entry_size)
+ {
+ if (memcmp (plt_contents,
+ non_lazy_ibt_plt->plt_entry,
+ non_lazy_ibt_plt->plt_got_offset) == 0)
+ {
+ /* Match IBT PLT. */
+ plt_type = plt_second;
+ non_lazy_plt = non_lazy_ibt_plt;
+ }
+ else if (memcmp (plt_contents,
+ non_lazy_ibt_plt->pic_plt_entry,
+ non_lazy_ibt_plt->plt_got_offset) == 0)
+ {
+ /* Match PIC IBT PLT. */
+ plt_type = plt_second | plt_pic;
+ non_lazy_plt = non_lazy_ibt_plt;
+ }
+ }
- return _bfd_elf_hash_symbol (h);
-}
+ if (plt_type == plt_unknown)
+ {
+ free (plt_contents);
+ continue;
+ }
-/* Parse i386 GNU properties. */
+ plts[j].sec = plt;
+ plts[j].type = plt_type;
-static enum elf_property_kind
-elf_i386_parse_gnu_properties (bfd *abfd, unsigned int type,
- bfd_byte *ptr, unsigned int datasz)
-{
- elf_property *prop;
+ if ((plt_type & plt_lazy))
+ {
+ plts[j].plt_got_offset = lazy_plt->plt_got_offset;
+ plts[j].plt_entry_size = lazy_plt->plt_entry_size;
+ /* Skip PLT0 in lazy PLT. */
+ i = 1;
+ }
+ else
+ {
+ plts[j].plt_got_offset = non_lazy_plt->plt_got_offset;
+ plts[j].plt_entry_size = non_lazy_plt->plt_entry_size;
+ i = 0;
+ }
- switch (type)
- {
- case GNU_PROPERTY_X86_ISA_1_USED:
- case GNU_PROPERTY_X86_ISA_1_NEEDED:
- if (datasz != 4)
+ /* Skip lazy PLT when the second PLT is used. */
+ if ((plt_type & (plt_lazy | plt_second))
+ == (plt_lazy | plt_second))
+ plts[j].count = 0;
+ else
{
- _bfd_error_handler
- ((type == GNU_PROPERTY_X86_ISA_1_USED
- ? _("error: %B: <corrupt x86 ISA used size: 0x%x>")
- : _("error: %B: <corrupt x86 ISA needed size: 0x%x>")),
- abfd, datasz);
- return property_corrupt;
+ n = plt->size / plts[j].plt_entry_size;
+ plts[j].count = n;
+ count += n - i;
}
- prop = _bfd_elf_get_property (abfd, type, datasz);
- prop->u.number = bfd_h_get_32 (abfd, ptr);
- prop->pr_kind = property_number;
- break;
- default:
- return property_ignored;
+ plts[j].contents = plt_contents;
+
+ /* The _GLOBAL_OFFSET_TABLE_ address is needed. */
+ if ((plt_type & plt_pic))
+ got_addr = (bfd_vma) -1;
}
- return property_number;
+ return _bfd_x86_elf_get_synthetic_symtab (abfd, count, relsize,
+ got_addr, plts, dynsyms,
+ ret);
}
-/* Merge i386 GNU property BPROP with APROP. If APROP isn't NULL,
- return TRUE if APROP is updated. Otherwise, return TRUE if BPROP
- should be merged with ABFD. */
+/* Set up i386 GNU properties. Return the first relocatable ELF input
+ with GNU properties if found. Otherwise, return NULL. */
-static bfd_boolean
-elf_i386_merge_gnu_properties (bfd *abfd ATTRIBUTE_UNUSED,
- elf_property *aprop,
- elf_property *bprop)
+static bfd *
+elf_i386_link_setup_gnu_properties (struct bfd_link_info *info)
{
- unsigned int number;
- bfd_boolean updated = FALSE;
- unsigned int pr_type = aprop != NULL ? aprop->pr_type : bprop->pr_type;
+ struct elf_x86_init_table init_table;
- switch (pr_type)
+ switch (get_elf_x86_backend_data (info->output_bfd)->target_os)
{
- case GNU_PROPERTY_X86_ISA_1_USED:
- case GNU_PROPERTY_X86_ISA_1_NEEDED:
- if (aprop != NULL && bprop != NULL)
- {
- number = aprop->u.number;
- aprop->u.number = number | bprop->u.number;
- updated = number != (unsigned int) aprop->u.number;
- }
- else
- {
- /* Return TRUE if APROP is NULL to indicate that BPROP should
- be added to ABFD. */
- updated = aprop == NULL;
- }
+ case is_normal:
+ case is_solaris:
+ init_table.plt0_pad_byte = 0x0;
+ init_table.lazy_plt = &elf_i386_lazy_plt;
+ init_table.non_lazy_plt = &elf_i386_non_lazy_plt;
+ init_table.lazy_ibt_plt = &elf_i386_lazy_ibt_plt;
+ init_table.non_lazy_ibt_plt = &elf_i386_non_lazy_ibt_plt;
+ break;
+ case is_vxworks:
+ init_table.plt0_pad_byte = 0x90;
+ init_table.lazy_plt = &elf_i386_lazy_plt;
+ init_table.non_lazy_plt = NULL;
+ init_table.lazy_ibt_plt = NULL;
+ init_table.non_lazy_ibt_plt = NULL;
+ break;
+ case is_nacl:
+ init_table.plt0_pad_byte = 0x90;
+ init_table.lazy_plt = &elf_i386_nacl_plt;
+ init_table.non_lazy_plt = NULL;
+ init_table.lazy_ibt_plt = NULL;
+ init_table.non_lazy_ibt_plt = NULL;
break;
-
- default:
- /* Never should happen. */
- abort ();
}
- return updated;
+ init_table.r_info = elf32_r_info;
+ init_table.r_sym = elf32_r_sym;
+
+ return _bfd_x86_elf_link_setup_gnu_properties (info, &init_table);
}
#define TARGET_LITTLE_SYM i386_elf32_vec
#define elf_info_to_howto elf_i386_info_to_howto_rel
#define elf_info_to_howto_rel elf_i386_info_to_howto_rel
-#define bfd_elf32_mkobject elf_i386_mkobject
-
#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 bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
#define bfd_elf32_get_synthetic_symtab elf_i386_get_synthetic_symtab
-#define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
#define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
#define elf_backend_check_relocs elf_i386_check_relocs
-#define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
-#define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
+#define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
#define elf_backend_fake_sections elf_i386_fake_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_output_arch_local_syms elf_i386_output_arch_local_syms
-#define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
#define elf_backend_grok_prstatus elf_i386_grok_prstatus
#define elf_backend_grok_psinfo elf_i386_grok_psinfo
#define elf_backend_reloc_type_class elf_i386_reloc_type_class
#define elf_backend_relocate_section elf_i386_relocate_section
-#define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
-#define elf_backend_always_size_sections elf_i386_always_size_sections
-#define elf_backend_omit_section_dynsym \
- ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
-#define elf_backend_hash_symbol elf_i386_hash_symbol
-#define elf_backend_fixup_symbol elf_i386_fixup_symbol
-#define elf_backend_parse_gnu_properties elf_i386_parse_gnu_properties
-#define elf_backend_merge_gnu_properties elf_i386_merge_gnu_properties
+#define elf_backend_setup_gnu_properties elf_i386_link_setup_gnu_properties
+#define elf_backend_hide_symbol _bfd_x86_elf_hide_symbol
+
+#define elf_backend_linux_prpsinfo32_ugid16 TRUE
+
+#define elf32_bed elf32_i386_bed
#include "elf32-target.h"
"FreeBSD" label in the ELF header. So we put this label on all
executables and (for simplicity) also all other object files. */
-static void
-elf_i386_fbsd_post_process_headers (bfd *abfd, struct bfd_link_info *info)
+static bfd_boolean
+elf_i386_fbsd_init_file_header (bfd *abfd, struct bfd_link_info *info)
{
- _bfd_elf_post_process_headers (abfd, info);
+ if (!_bfd_elf_init_file_header (abfd, info))
+ return FALSE;
#ifdef OLD_FREEBSD_ABI_LABEL
{
memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
}
#endif
+ return TRUE;
}
-#undef elf_backend_post_process_headers
-#define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
+#undef elf_backend_init_file_header
+#define elf_backend_init_file_header elf_i386_fbsd_init_file_header
#undef elf32_bed
#define elf32_bed elf32_i386_fbsd_bed
#include "elf32-target.h"
+#undef elf_backend_init_file_header
+
/* Solaris 2. */
#undef TARGET_LITTLE_SYM
#undef TARGET_LITTLE_NAME
#define TARGET_LITTLE_NAME "elf32-i386-sol2"
-#undef elf_backend_post_process_headers
+static const struct elf_x86_backend_data elf_i386_solaris_arch_bed =
+ {
+ is_solaris /* os */
+ };
+
+#undef elf_backend_arch_data
+#define elf_backend_arch_data &elf_i386_solaris_arch_bed
/* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
objects won't be recognized. */
#define elf_backend_strtab_flags SHF_STRINGS
/* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which
- has a type >= SHT_LOOS. Returns TRUE if these fields were initialised
+ has a type >= SHT_LOOS. Returns TRUE if these fields were initialised
FALSE otherwise. ISECTION is the best guess matching section from the
input bfd IBFD, but it might be NULL. */
http://docs.oracle.com/cd/E53394_01/html/E54813/chapter6-94076.html#scrolltoc
The following values should be set:
-
-Type Link Info
+
+Type Link Info
-----------------------------------------------------------------------------
SHT_SUNW_ancillary The section header index of 0
- [0x6fffffee] the associated string table.
-
+ [0x6fffffee] the associated string table.
+
SHT_SUNW_capinfo The section header index of For a dynamic object, the
- [0x6ffffff0] the associated symbol table. section header index of
- the associated
+ [0x6ffffff0] the associated symbol table. section header index of
+ the associated
SHT_SUNW_capchain table,
otherwise 0.
SHT_SUNW_symsort The section header index of 0
- [0x6ffffff1] the associated symbol table.
+ [0x6ffffff1] the associated symbol table.
SHT_SUNW_tlssort The section header index of 0
- [0x6ffffff2] the associated symbol table.
-
-SHT_SUNW_LDYNSYM The section header index of One greater than the
- [0x6ffffff3] the associated string table. symbol table index of the
- This index is the same string last local symbol,
+ [0x6ffffff2] the associated symbol table.
+
+SHT_SUNW_LDYNSYM The section header index of One greater than the
+ [0x6ffffff3] the associated string table. symbol table index of the
+ This index is the same string last local symbol,
table used by the SHT_DYNSYM STB_LOCAL. Since
- section. SHT_SUNW_LDYNSYM only
- contains local symbols,
+ section. SHT_SUNW_LDYNSYM only
+ contains local symbols,
sh_info is equivalent to
the number of symbols in
the table.
-SHT_SUNW_cap If symbol capabilities exist, If any capabilities refer
- [0x6ffffff5] the section header index of to named strings, the
- the associated section header index of
- SHT_SUNW_capinfo table, the associated string
- otherwise 0. table, otherwise 0.
+SHT_SUNW_cap If symbol capabilities exist, If any capabilities refer
+ [0x6ffffff5] the section header index of to named strings, the
+ the associated section header index of
+ SHT_SUNW_capinfo table, the associated string
+ otherwise 0. table, otherwise 0.
-SHT_SUNW_move The section header index of 0
- [0x6ffffffa] the associated symbol table.
-
-SHT_SUNW_COMDAT 0 0
+SHT_SUNW_move The section header index of 0
+ [0x6ffffffa] the associated symbol table.
+
+SHT_SUNW_COMDAT 0 0
[0x6ffffffb]
SHT_SUNW_syminfo The section header index of The section header index
- [0x6ffffffc] the associated symbol table. of the associated
- .dynamic section.
+ [0x6ffffffc] the associated symbol table. of the associated
+ .dynamic section.
-SHT_SUNW_verdef The section header index of The number of version
- [0x6ffffffd] the associated string table. definitions within the
- section.
+SHT_SUNW_verdef The section header index of The number of version
+ [0x6ffffffd] the associated string table. definitions within the
+ section.
SHT_SUNW_verneed The section header index of The number of version
- [0x6ffffffe] the associated string table. dependencies within the
- section.
+ [0x6ffffffe] the associated string table. dependencies within the
+ section.
-SHT_SUNW_versym The section header index of 0
- [0x6fffffff] the associated symbol table. */
+SHT_SUNW_versym The section header index of 0
+ [0x6fffffff] the associated symbol table. */
}
#undef elf_backend_copy_special_section_fields
#undef ELF_MACHINE_CODE
#define ELF_MACHINE_CODE EM_IAMCU
+#undef elf_backend_arch_data
+#define elf_backend_arch_data &elf_i386_arch_bed
+
#undef ELF_OSABI
#undef elf32_bed
#undef elf_backend_static_tls_alignment
#undef elf_backend_want_plt_sym
-#define elf_backend_want_plt_sym 0
+#define elf_backend_want_plt_sym 0
#undef elf_backend_strtab_flags
#undef elf_backend_copy_special_section_fields
#undef ELF_OSABI
#undef elf_backend_want_plt_sym
#define elf_backend_want_plt_sym 0
-#undef elf_backend_post_process_headers
#undef elf_backend_static_tls_alignment
/* NaCl uses substantially different PLT entries for the same effects. */
static const bfd_byte elf_i386_nacl_plt0_entry[] =
{
0xff, 0x35, /* pushl contents of address */
- 0, 0, 0, 0, /* replaced with address of .got + 4. */
- 0x8b, 0x0d, /* movl contents of address, %ecx */
- 0, 0, 0, 0, /* replaced with address of .got + 8. */
+ 0, 0, 0, 0, /* replaced with address of .got + 4. */
+ 0x8b, 0x0d, /* movl contents of address, %ecx */
+ 0, 0, 0, 0, /* replaced with address of .got + 8. */
0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
0xff, 0xe1 /* jmp *%ecx */
};
0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
0xff, 0xe1, /* jmp *%ecx */
- /* Pad to the next 32-byte boundary with nop instructions. */
+ /* Pad to the next 32-byte boundary with nop instructions. */
0x90,
0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
0x68, /* pushl immediate */
0, 0, 0, 0, /* replaced with reloc offset. */
0xe9, /* jmp relative */
- 0, 0, 0, 0, /* replaced with offset to .plt. */
+ 0, 0, 0, 0, /* replaced with offset to .plt. */
- /* Pad to the next 32-byte boundary with nop instructions. */
+ /* Pad to the next 32-byte boundary with nop instructions. */
0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
0x90, 0x90
static const bfd_byte elf_i386_nacl_pic_plt_entry[NACL_PLT_ENTRY_SIZE] =
{
- 0x8b, 0x8b, /* movl offset(%ebx), %ecx */
- 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
- 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */
- 0xff, 0xe1, /* jmp *%ecx */
+ 0x8b, 0x8b, /* movl offset(%ebx), %ecx */
+ 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
+ 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */
+ 0xff, 0xe1, /* jmp *%ecx */
- /* Pad to the next 32-byte boundary with nop instructions. */
+ /* Pad to the next 32-byte boundary with nop instructions. */
0x90,
0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
/* Lazy GOT entries point here (32-byte aligned). */
- 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. */
+ 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. */
- /* Pad to the next 32-byte boundary with nop instructions. */
+ /* Pad to the next 32-byte boundary with nop instructions. */
0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
0x90, 0x90
static const bfd_byte elf_i386_nacl_eh_frame_plt[] =
{
-#if (PLT_CIE_LENGTH != 20 \
- || PLT_FDE_LENGTH != 36 \
- || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
+#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_i386_backend_data parameters for eh_frame_plt offsets!"
+# error "Need elf_x86_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 */
- 0x7c, /* Data alignment factor: -4 */
- 8, /* Return address column */
+ 0, 0, 0, 0, /* CIE ID */
+ 1, /* CIE version */
+ 'z', 'R', 0, /* Augmentation string */
+ 1, /* Code alignment factor */
+ 0x7c, /* Data alignment factor: -4 */
+ 8, /* Return address column */
1, /* Augmentation size */
DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
DW_CFA_nop, DW_CFA_nop,
- PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
+ PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
- 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
- 0, 0, 0, 0, /* .plt size goes here */
- 0, /* Augmentation size */
- DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
- DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
- DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
- 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_breg4, 4, /* DW_OP_breg4 (esp): 4 */
- DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
+ 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
+ 0, 0, 0, 0, /* .plt size goes here */
+ 0, /* Augmentation size */
+ DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
+ DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
+ DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
+ 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_breg4, 4, /* DW_OP_breg4 (esp): 4 */
+ DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge,
DW_OP_lit2, DW_OP_shl, DW_OP_plus,
DW_CFA_nop, DW_CFA_nop
};
-static const struct elf_i386_plt_layout elf_i386_nacl_plt =
+static const struct elf_x86_lazy_plt_layout elf_i386_nacl_plt =
{
elf_i386_nacl_plt0_entry, /* plt0_entry */
sizeof (elf_i386_nacl_plt0_entry), /* plt0_entry_size */
- 2, /* plt0_got1_offset */
- 8, /* plt0_got2_offset */
elf_i386_nacl_plt_entry, /* plt_entry */
NACL_PLT_ENTRY_SIZE, /* plt_entry_size */
+ NULL, /* plt_tlsdesc_entry */
+ 0, /* plt_tlsdesc_entry_size*/
+ 0, /* plt_tlsdesc_got1_offset */
+ 0, /* plt_tlsdesc_got2_offset */
+ 0, /* plt_tlsdesc_got1_insn_end */
+ 0, /* plt_tlsdesc_got2_insn_end */
+ 2, /* plt0_got1_offset */
+ 8, /* plt0_got2_offset */
+ 0, /* plt0_got2_insn_end */
2, /* plt_got_offset */
33, /* plt_reloc_offset */
38, /* plt_plt_offset */
+ 0, /* plt_got_insn_size */
+ 0, /* plt_plt_insn_end */
32, /* plt_lazy_offset */
elf_i386_nacl_pic_plt0_entry, /* pic_plt0_entry */
elf_i386_nacl_pic_plt_entry, /* pic_plt_entry */
elf_i386_nacl_eh_frame_plt, /* eh_frame_plt */
- sizeof (elf_i386_nacl_eh_frame_plt),/* eh_frame_plt_size */
- NULL, /* eh_frame_plt_got */
- 0, /* eh_frame_plt_got_size */
+ sizeof (elf_i386_nacl_eh_frame_plt) /* eh_frame_plt_size */
};
-static const struct elf_i386_backend_data elf_i386_nacl_arch_bed =
+static const struct elf_x86_backend_data elf_i386_nacl_arch_bed =
{
- &elf_i386_nacl_plt, /* plt */
- 0x90, /* plt0_pad_byte: nop insn */
- 0, /* is_vxworks */
+ is_nacl /* os */
};
static bfd_boolean
#define elf_backend_object_p elf32_i386_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_modify_headers
+#define elf_backend_modify_headers nacl_modify_headers
#undef elf_backend_final_write_processing
#define elf_backend_final_write_processing nacl_final_write_processing
/* Restore defaults. */
#undef elf_backend_object_p
#undef elf_backend_modify_segment_map
-#undef elf_backend_modify_program_headers
+#undef elf_backend_modify_headers
#undef elf_backend_final_write_processing
/* VxWorks support. */
#undef elf_backend_plt_alignment
#define elf_backend_plt_alignment 4
-static const struct elf_i386_backend_data elf_i386_vxworks_arch_bed =
+static const struct elf_x86_backend_data elf_i386_vxworks_arch_bed =
{
- &elf_i386_plt, /* plt */
- 0x90, /* plt0_pad_byte */
- 1, /* is_vxworks */
+ is_vxworks /* os */
};
#undef elf_backend_arch_data