+2017-01-10 H.J. Lu <hongjiu.lu@intel.com>
+
+ PR ld/20830
+ * elf32-i386.c (elf_i386_eh_frame_plt_got): New.
+ (PLT_GOT_FDE_LENGTH): Likewise.
+ (elf_i386_plt_layout): Add eh_frame_plt_got and
+ eh_frame_plt_got_size.
+ (elf_i386_plt): Updated.
+ (elf_i386_link_hash_table): Add plt_got_eh_frame.
+ (elf_i386_check_relocs): Create .eh_frame section for .plt.got.
+ (elf_i386_size_dynamic_sections): Allocate and initialize
+ .eh_frame section for .plt.got.
+ (elf_i386_finish_dynamic_sections): Adjust .eh_frame section for
+ .plt.got.
+ (elf_i386_nacl_plt): Add FIXME for eh_frame_plt_got and
+ eh_frame_plt_got_size.
+ * elf64-x86-64.c (elf_x86_64_eh_frame_plt_got): New.
+ (PLT_GOT_FDE_LENGTH): Likewise.
+ (elf_x86_64_backend_data): Add eh_frame_plt_got and
+ eh_frame_plt_got_size.
+ (elf_x86_64_arch_bed): Updated.
+ (elf_x86_64_bnd_arch_bed): Add FIXME for eh_frame_plt_got and
+ eh_frame_plt_got_size.
+ (elf_x86_64_nacl_arch_bed): Likewise.
+ (elf_x86_64_link_hash_table): Add plt_got_eh_frame.
+ (elf_x86_64_check_relocs): Create .eh_frame section for .plt.got.
+ (elf_x86_64_size_dynamic_sections): Allocate and initialize
+ .eh_frame section for .plt.got.
+ (elf_x86_64_finish_dynamic_sections): Adjust .eh_frame section
+ for .plt.got.
+
2017-01-10 H.J. Lu <hongjiu.lu@intel.com>
* elf32-i386.c (elf_i386_size_dynamic_sections): Set
DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
};
+/* .eh_frame covering the .plt.got section. */
+
+static const bfd_byte elf_i386_eh_frame_plt_got[] =
+{
+#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,
+
+ 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 .plt.got goes here */
+ 0, 0, 0, 0, /* .plt.got size goes here */
+ 0, /* Augmentation size */
+ 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. */
/* .eh_frame covering the .plt section. */
const bfd_byte *eh_frame_plt;
unsigned int 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;
};
#define GET_PLT_ENTRY_SIZE(abfd) \
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 */
};
\f
asection *interp;
asection *plt_eh_frame;
asection *plt_got;
+ asection *plt_got_eh_frame;
union
{
htab->plt_got,
plt_got_align))
goto error_return;
+
+ if (!info->no_ld_generated_unwind_info
+ && htab->plt_got_eh_frame == NULL
+ && get_elf_i386_backend_data (abfd)->plt->eh_frame_plt_got != NULL)
+ {
+ flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
+ | SEC_HAS_CONTENTS | SEC_IN_MEMORY
+ | SEC_LINKER_CREATED);
+ htab->plt_got_eh_frame
+ = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
+ ".eh_frame",
+ flags);
+ if (htab->plt_got_eh_frame == NULL
+ || !bfd_set_section_alignment (htab->elf.dynobj,
+ htab->plt_got_eh_frame,
+ 3))
+ goto error_return;
+ }
}
if (r_type == R_386_GOT32X
htab->elf.sgotplt->size = 0;
}
-
- if (htab->plt_eh_frame != NULL
- && htab->elf.splt != NULL
- && htab->elf.splt->size != 0
- && !bfd_is_abs_section (htab->elf.splt->output_section)
- && _bfd_elf_eh_frame_present (info))
- htab->plt_eh_frame->size
- = get_elf_i386_backend_data (output_bfd)->plt->eh_frame_plt_size;
+ 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;
+ }
/* We now have determined the sizes of the various dynamic sections.
Allocate memory for them. */
|| 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)
{
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)
{
/* Add some entries to the .dynamic section. We fill in the
}
}
+ /* 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;
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 */
};
static const struct elf_i386_backend_data elf_i386_nacl_arch_bed =
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[] =
+{
+#define PLT_GOT_FDE_LENGTH 20
+ 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_GOT_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, /* Augmentation size */
+ DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop,
+ DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
+};
+
/* Architecture-specific backend data for x86-64. */
struct elf_x86_64_backend_data
/* .eh_frame covering the .plt section. */
const bfd_byte *eh_frame_plt;
unsigned int 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;
};
#define get_elf_x86_64_arch_data(bed) \
6, /* plt_lazy_offset */
elf_x86_64_eh_frame_plt, /* eh_frame_plt */
sizeof (elf_x86_64_eh_frame_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 */
};
static const struct elf_x86_64_backend_data elf_x86_64_bnd_arch_bed =
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 */
};
#define elf_backend_arch_data &elf_x86_64_arch_bed
asection *plt_eh_frame;
asection *plt_bnd;
asection *plt_got;
+ asection *plt_got_eh_frame;
union
{
htab->plt_got,
plt_got_align))
goto error_return;
+
+ if (!info->no_ld_generated_unwind_info
+ && htab->plt_got_eh_frame == NULL
+ && get_elf_x86_64_backend_data (abfd)->eh_frame_plt_got != NULL)
+ {
+ flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
+ | SEC_HAS_CONTENTS | SEC_IN_MEMORY
+ | SEC_LINKER_CREATED);
+ htab->plt_got_eh_frame
+ = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
+ ".eh_frame",
+ flags);
+ if (htab->plt_got_eh_frame == NULL
+ || !bfd_set_section_alignment (htab->elf.dynobj,
+ htab->plt_got_eh_frame,
+ 3))
+ goto error_return;
+ }
}
if ((r_type == R_X86_64_GOTPCREL
htab->elf.sgotplt->size = 0;
}
- if (htab->plt_eh_frame != NULL
- && htab->elf.splt != NULL
- && htab->elf.splt->size != 0
- && !bfd_is_abs_section (htab->elf.splt->output_section)
- && _bfd_elf_eh_frame_present (info))
+ if (_bfd_elf_eh_frame_present (info))
{
- const struct elf_x86_64_backend_data *arch_data
- = get_elf_x86_64_arch_data (bed);
- htab->plt_eh_frame->size = arch_data->eh_frame_plt_size;
+ 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;
+ }
+
+ 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;
+ }
}
/* We now have determined the sizes of the various dynamic sections.
|| s == htab->plt_bnd
|| s == htab->plt_got
|| s == htab->plt_eh_frame
+ || s == htab->plt_got_eh_frame
|| s == htab->elf.sdynbss
|| s == htab->elf.sdynrelro)
{
htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET);
}
+ 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);
+ bfd_put_32 (dynobj, htab->plt_got->size,
+ (htab->plt_got_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.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
= GOT_ENTRY_SIZE;
32, /* plt_lazy_offset */
elf_x86_64_nacl_eh_frame_plt, /* eh_frame_plt */
sizeof (elf_x86_64_nacl_eh_frame_plt), /* eh_frame_plt_size */
+ NULL, /* eh_frame_plt_got */
+ 0, /* eh_frame_plt_got_size */
};
#undef elf_backend_arch_data
+2017-01-10 H.J. Lu <hongjiu.lu@intel.com>
+
+ PR ld/20830
+ * testsuite/ld-i386/i386.exp: Run pr20830.
+ * testsuite/ld-x86-64/x86-64.exp: Likewise.
+ * testsuite/ld-i386/pr20830.d: New file.
+ * testsuite/ld-i386/pr20830.s: Likewise.
+ * testsuite/ld-x86-64/pr20830.d: Likewise.
+ * testsuite/ld-x86-64/pr20830.s: Likewise.
+
2017-01-10 H.J. Lu <hongjiu.lu@intel.com>
* testsuite/ld-i386/i386.exp: Pass -Wl,-R,tmpdir and
# Linux only tests
run_dump_test "pltgot-1"
run_dump_test "pltgot-2"
+run_dump_test "pr20830"
--- /dev/null
+#name: PR ld/20830 (.plt.got)
+#as: --32
+#ld: -melf_i386 -shared -z relro --ld-generated-unwind-info
+#objdump: -dw -Wf
+
+.*: +file format .*
+
+Contents of the .eh_frame section:
+
+0+ 00000014 00000000 CIE
+ Version: 1
+ Augmentation: "zR"
+ Code alignment factor: 1
+ Data alignment factor: -4
+ Return address column: 8
+ Augmentation data: 1b
+
+ DW_CFA_def_cfa: r4 \(esp\) ofs 4
+ DW_CFA_offset: r8 \(eip\) at cfa-4
+ DW_CFA_nop
+ DW_CFA_nop
+
+0+18 00000010 0000001c FDE cie=00000000 pc=00000188..00000193
+ DW_CFA_nop
+ DW_CFA_nop
+ DW_CFA_nop
+
+0+2c 00000020 00000030 FDE cie=00000000 pc=00000170..00000180
+ DW_CFA_def_cfa_offset: 8
+ DW_CFA_advance_loc: 6 to 00000176
+ DW_CFA_def_cfa_offset: 12
+ DW_CFA_advance_loc: 10 to 00000180
+ DW_CFA_def_cfa_expression \(DW_OP_breg4 \(esp\): 4; DW_OP_breg8 \(eip\): 0; DW_OP_lit15; DW_OP_and; DW_OP_lit11; DW_OP_ge; DW_OP_lit2; DW_OP_shl; DW_OP_plus\)
+
+0+50 00000010 00000054 FDE cie=00000000 pc=00000180..00000188
+ DW_CFA_nop
+ DW_CFA_nop
+ DW_CFA_nop
+
+
+Disassembly of section .plt:
+
+0+170 <.plt>:
+ +[a-f0-9]+: ff b3 04 00 00 00 pushl 0x4\(%ebx\)
+ +[a-f0-9]+: ff a3 08 00 00 00 jmp \*0x8\(%ebx\)
+ +[a-f0-9]+: 00 00 add %al,\(%eax\)
+ ...
+
+Disassembly of section .plt.got:
+
+0+180 <.plt.got>:
+ +[a-f0-9]+: ff a3 fc ff ff ff jmp \*-0x4\(%ebx\)
+ +[a-f0-9]+: 66 90 xchg %ax,%ax
+
+Disassembly of section .text:
+
+0+188 <foo>:
+ +[a-f0-9]+: e8 f3 ff ff ff call 180 <.plt.got>
+ +[a-f0-9]+: 8b 83 fc ff ff ff mov -0x4\(%ebx\),%eax
+#pass
--- /dev/null
+ .text
+ .globl foo
+ .type foo, @function
+foo:
+ .cfi_startproc
+ call func@plt
+ movl func@GOT(%ebx), %eax
+ .cfi_endproc
--- /dev/null
+#name: PR ld/20830 (.plt.got)
+#as: --64
+#ld: -melf_x86_64 -shared -z relro --ld-generated-unwind-info
+#objdump: -dw -Wf
+
+.*: +file format .*
+
+Contents of the .eh_frame section:
+
+0+ 0000000000000014 00000000 CIE
+ Version: 1
+ Augmentation: "zR"
+ Code alignment factor: 1
+ Data alignment factor: -8
+ Return address column: 16
+ Augmentation data: 1b
+
+ DW_CFA_def_cfa: r7 \(rsp\) ofs 8
+ DW_CFA_offset: r16 \(rip\) at cfa-8
+ DW_CFA_nop
+ DW_CFA_nop
+
+0+18 0000000000000014 0000001c FDE cie=00000000 pc=0000000000000238..0000000000000244
+ DW_CFA_nop
+ DW_CFA_nop
+ DW_CFA_nop
+ DW_CFA_nop
+ DW_CFA_nop
+ DW_CFA_nop
+ DW_CFA_nop
+
+0+30 0000000000000024 00000034 FDE cie=00000000 pc=0000000000000220..0000000000000230
+ DW_CFA_def_cfa_offset: 16
+ DW_CFA_advance_loc: 6 to 0000000000000226
+ DW_CFA_def_cfa_offset: 24
+ DW_CFA_advance_loc: 10 to 0000000000000230
+ DW_CFA_def_cfa_expression \(DW_OP_breg7 \(rsp\): 8; DW_OP_breg16 \(rip\): 0; DW_OP_lit15; DW_OP_and; DW_OP_lit11; DW_OP_ge; DW_OP_lit3; DW_OP_shl; DW_OP_plus\)
+ DW_CFA_nop
+ DW_CFA_nop
+ DW_CFA_nop
+ DW_CFA_nop
+
+0+58 0000000000000014 0000005c FDE cie=00000000 pc=0000000000000230..0000000000000238
+ DW_CFA_nop
+ DW_CFA_nop
+ DW_CFA_nop
+ DW_CFA_nop
+ DW_CFA_nop
+ DW_CFA_nop
+ DW_CFA_nop
+
+
+Disassembly of section .plt:
+
+0+220 <.plt>:
+ +[a-f0-9]+: ff 35 e2 0d 20 00 pushq 0x200de2\(%rip\) # 201008 <_GLOBAL_OFFSET_TABLE_\+0x8>
+ +[a-f0-9]+: ff 25 e4 0d 20 00 jmpq \*0x200de4\(%rip\) # 201010 <_GLOBAL_OFFSET_TABLE_\+0x10>
+ +[a-f0-9]+: 0f 1f 40 00 nopl 0x0\(%rax\)
+
+Disassembly of section .plt.got:
+
+0+230 <.plt.got>:
+ +[a-f0-9]+: ff 25 c2 0d 20 00 jmpq \*0x200dc2\(%rip\) # 200ff8 <func>
+ +[a-f0-9]+: 66 90 xchg %ax,%ax
+
+Disassembly of section .text:
+
+0+238 <foo>:
+ +[a-f0-9]+: e8 f3 ff ff ff callq 230 <.plt.got>
+ +[a-f0-9]+: 48 8b 05 b4 0d 20 00 mov 0x200db4\(%rip\),%rax # 200ff8 <func>
+#pass
--- /dev/null
+ .text
+ .globl foo
+ .type foo, @function
+foo:
+ .cfi_startproc
+ call func@plt
+ movq func@GOTPCREL(%rip), %rax
+ .cfi_endproc
run_dump_test "pr17618"
run_dump_test "pltgot-1"
run_dump_test "pltgot-2"
+run_dump_test "pr20830"
projects / binutils-gdb.git / commitdiff