DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
};
+/* .eh_frame covering the BND .plt section. */
+
+static const bfd_byte elf_x86_64_eh_frame_bnd_plt[] =
+{
+ PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
+ 0, 0, 0, 0, /* CIE ID */
+ 1, /* CIE version */
+ 'z', 'R', 0, /* Augmentation string */
+ 1, /* Code alignment factor */
+ 0x78, /* Data alignment factor */
+ 16, /* Return address column */
+ 1, /* Augmentation size */
+ DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
+ DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
+ DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
+ DW_CFA_nop, DW_CFA_nop,
+
+ PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
+ PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
+ 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
+ 0, 0, 0, 0, /* .plt size goes here */
+ 0, /* Augmentation size */
+ DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */
+ DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
+ DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */
+ DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
+ DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
+ 11, /* Block length */
+ DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */
+ DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */
+ DW_OP_lit15, DW_OP_and, DW_OP_lit5, DW_OP_ge,
+ DW_OP_lit3, DW_OP_shl, DW_OP_plus,
+ DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
+};
+
/* .eh_frame covering the .plt.got section. */
static const bfd_byte elf_x86_64_eh_frame_plt_got[] =
1+6, /* plt_got_insn_size */
11, /* plt_plt_insn_end */
0, /* plt_lazy_offset */
- elf_x86_64_eh_frame_plt, /* eh_frame_plt */
- sizeof (elf_x86_64_eh_frame_plt), /* eh_frame_plt_size */
- /* FIXME: Needs .eh_frame coverage. */
- NULL, /* eh_frame_plt_got */
- 0, /* eh_frame_plt_got_size */
+ elf_x86_64_eh_frame_bnd_plt, /* eh_frame_plt */
+ sizeof (elf_x86_64_eh_frame_bnd_plt), /* eh_frame_plt_size */
+ elf_x86_64_eh_frame_plt_got, /* eh_frame_plt_got */
+ sizeof (elf_x86_64_eh_frame_plt_got), /* eh_frame_plt_got_size */
};
#define elf_backend_arch_data &elf_x86_64_arch_bed
asection *interp;
asection *plt_eh_frame;
asection *plt_bnd;
+ asection *plt_bnd_eh_frame;
asection *plt_got;
asection *plt_got_eh_frame;
/* MPX PLT is supported only if elf_x86_64_arch_bed
is used in 64-bit mode. */
if (ABI_64_P (abfd)
- && info->bndplt
- && (get_elf_x86_64_backend_data (abfd)
- == &elf_x86_64_arch_bed))
+ && info->bndplt
+ && (get_elf_x86_64_backend_data (abfd)
+ == &elf_x86_64_arch_bed))
{
elf_x86_64_hash_entry (h)->has_bnd_reloc = 1;
/* Create the second PLT for Intel MPX support. */
if (htab->plt_bnd == NULL)
{
- unsigned int plt_bnd_align;
const struct elf_backend_data *bed;
bed = get_elf_backend_data (info->output_bfd);
BFD_ASSERT (sizeof (elf_x86_64_bnd_plt2_entry) == 8
&& (sizeof (elf_x86_64_bnd_plt2_entry)
== sizeof (elf_x86_64_legacy_plt2_entry)));
- plt_bnd_align = 3;
if (htab->elf.dynobj == NULL)
htab->elf.dynobj = abfd;
if (htab->plt_bnd == NULL
|| !bfd_set_section_alignment (htab->elf.dynobj,
htab->plt_bnd,
- plt_bnd_align))
+ 3))
+ goto error_return;
+ }
+
+ if (!info->no_ld_generated_unwind_info
+ && htab->plt_bnd_eh_frame == NULL)
+ {
+ flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
+ | SEC_HAS_CONTENTS | SEC_IN_MEMORY
+ | SEC_LINKER_CREATED);
+ htab->plt_bnd_eh_frame
+ = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
+ ".eh_frame",
+ flags);
+ if (htab->plt_bnd_eh_frame == NULL
+ || !bfd_set_section_alignment (htab->elf.dynobj,
+ htab->plt_bnd_eh_frame,
+ 3))
goto error_return;
}
}
bfd_boolean relocs;
bfd *ibfd;
const struct elf_backend_data *bed;
+ const struct elf_x86_64_backend_data *arch_data;
htab = elf_x86_64_hash_table (info);
if (htab == NULL)
htab->elf.sgotplt->size = 0;
}
+ arch_data = (htab->plt_bnd != NULL
+ ? &elf_x86_64_bnd_arch_bed
+ : get_elf_x86_64_arch_data (bed));
+
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))
- {
- const struct elf_x86_64_backend_data *arch_data
- = get_elf_x86_64_arch_data (bed);
- htab->plt_eh_frame->size = arch_data->eh_frame_plt_size;
- }
+ htab->plt_eh_frame->size = arch_data->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))
- {
- const struct elf_x86_64_backend_data *arch_data
- = get_elf_x86_64_arch_data (bed);
- htab->plt_got_eh_frame->size
- = arch_data->eh_frame_plt_got_size;
- }
+ htab->plt_got_eh_frame->size = arch_data->eh_frame_plt_got_size;
+
+ /* Unwind info for .plt.bnd and .plt.got sections are
+ identical. */
+ if (htab->plt_bnd_eh_frame != NULL
+ && htab->plt_bnd != NULL
+ && htab->plt_bnd->size != 0
+ && !bfd_is_abs_section (htab->plt_bnd->output_section))
+ htab->plt_bnd_eh_frame->size = arch_data->eh_frame_plt_got_size;
}
/* We now have determined the sizes of the various dynamic sections.
|| s == htab->plt_got
|| s == htab->plt_eh_frame
|| s == htab->plt_got_eh_frame
+ || s == htab->plt_bnd_eh_frame
|| s == htab->elf.sdynbss
|| s == htab->elf.sdynrelro)
{
if (htab->plt_eh_frame != NULL
&& htab->plt_eh_frame->contents != NULL)
{
- const struct elf_x86_64_backend_data *arch_data
- = get_elf_x86_64_arch_data (bed);
-
memcpy (htab->plt_eh_frame->contents,
arch_data->eh_frame_plt, htab->plt_eh_frame->size);
bfd_put_32 (dynobj, htab->elf.splt->size,
if (htab->plt_got_eh_frame != NULL
&& htab->plt_got_eh_frame->contents != NULL)
{
- const struct elf_x86_64_backend_data *arch_data
- = get_elf_x86_64_arch_data (bed);
-
memcpy (htab->plt_got_eh_frame->contents,
arch_data->eh_frame_plt_got,
htab->plt_got_eh_frame->size);
+ PLT_FDE_LEN_OFFSET));
}
+ if (htab->plt_bnd_eh_frame != NULL
+ && htab->plt_bnd_eh_frame->contents != NULL)
+ {
+ memcpy (htab->plt_bnd_eh_frame->contents,
+ arch_data->eh_frame_plt_got,
+ htab->plt_bnd_eh_frame->size);
+ bfd_put_32 (dynobj, htab->plt_bnd->size,
+ (htab->plt_bnd_eh_frame->contents
+ + PLT_FDE_LEN_OFFSET));
+ }
+
if (htab->elf.dynamic_sections_created)
{
/* Add some entries to the .dynamic section. We fill in the
}
}
+ /* Adjust .eh_frame for .plt.bnd section. */
+ if (htab->plt_bnd_eh_frame != NULL
+ && htab->plt_bnd_eh_frame->contents != NULL)
+ {
+ if (htab->plt_bnd != NULL
+ && htab->plt_bnd->size != 0
+ && (htab->plt_bnd->flags & SEC_EXCLUDE) == 0
+ && htab->plt_bnd->output_section != NULL
+ && htab->plt_bnd_eh_frame->output_section != NULL)
+ {
+ bfd_vma plt_start = htab->plt_bnd->output_section->vma;
+ bfd_vma eh_frame_start = htab->plt_bnd_eh_frame->output_section->vma
+ + htab->plt_bnd_eh_frame->output_offset
+ + PLT_FDE_START_OFFSET;
+ bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
+ htab->plt_bnd_eh_frame->contents
+ + PLT_FDE_START_OFFSET);
+ }
+ if (htab->plt_bnd_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME)
+ {
+ if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
+ htab->plt_bnd_eh_frame,
+ htab->plt_bnd_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
= GOT_ENTRY_SIZE;
projects / thirdparty / binutils-gdb.git / commitdiff
