/* Intel 80386/80486-specific support for 32-bit ELF
- Copyright (C) 1993-2016 Free Software Foundation, Inc.
+ Copyright (C) 1993-2017 Free Software Foundation, Inc.
This file is part of BFD, the Binary File Descriptor library.
&& ((indx = r_type - R_386_vt_offset) - R_386_ext2
>= R_386_vt - R_386_ext2))
{
- (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
- abfd, (int) r_type);
+ /* xgettext:c-format */
+ _bfd_error_handler (_("%B: invalid relocation type %d"),
+ abfd, (int) r_type);
indx = R_386_NONE;
}
/* PR 17512: file: 0f67f69d. */
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
/* Short-cuts to get to dynamic linker sections. */
asection *interp;
- asection *sdynbss;
- asection *srelbss;
asection *plt_eh_frame;
asection *plt_got;
+ asection *plt_got_eh_frame;
union
{
htab->interp = s;
}
- htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
- if (!htab->sdynbss)
- abort ();
-
- if (bfd_link_executable (info))
- {
- /* Always allow copy relocs for building executables. */
- asection *s = bfd_get_linker_section (dynobj, ".rel.bss");
- if (s == NULL)
- {
- const struct elf_backend_data *bed = get_elf_backend_data (dynobj);
- s = bfd_make_section_anyway_with_flags (dynobj,
- ".rel.bss",
- (bed->dynamic_sec_flags
- | SEC_READONLY));
- if (s == NULL
- || ! bfd_set_section_alignment (dynobj, s,
- bed->s->log_file_align))
- return FALSE;
- }
- htab->srelbss = s;
- }
-
if (get_elf_i386_backend_data (dynobj)->is_vxworks
&& !elf_vxworks_create_dynamic_sections (dynobj, info,
&htab->srelplt2))
/* 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. */
- dir->ref_dynamic |= ind->ref_dynamic;
+ 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;
}
}
- (*_bfd_error_handler)
+ _bfd_error_handler
+ /* xgettext:c-format */
(_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
"in section `%A' failed"),
abfd, sec, from->name, to->name, name,
else
name = h->root.root.string;
- (*_bfd_error_handler)
+ _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;
if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
{
- (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
- abfd,
- r_symndx);
+ /* xgettext:c-format */
+ _bfd_error_handler (_("%B: bad symbol index: %d"),
+ abfd, r_symndx);
goto error_return;
}
case R_386_GOTOFF:
eh->gotoff_ref = 1;
+ /* Fall through. */
case R_386_32:
case R_386_PC32:
case R_386_PLT32:
else
name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
NULL);
- (*_bfd_error_handler)
+ _bfd_error_handler
+ /* xgettext:c-format */
(_("%B: `%s' accessed both as normal and "
"thread local symbol"),
abfd, name);
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
{
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,
+ 2))
+ goto error_return;
+ }
}
if (r_type == R_386_GOT32X
struct elf_link_hash_entry *h)
{
struct elf_i386_link_hash_table *htab;
- asection *s;
+ asection *s, *srel;
struct elf_i386_link_hash_entry *eh;
struct elf_dyn_relocs *p;
/* 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)
{
- htab->srelbss->size += sizeof (Elf32_External_Rel);
+ srel->size += sizeof (Elf32_External_Rel);
h->needs_copy = 1;
}
- s = htab->sdynbss;
-
return _bfd_elf_adjust_dynamic_copy (info, h, s);
}
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);
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);
}
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 = sizeof (elf_i386_eh_frame_plt);
+ 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->sdynbss)
+ || s == htab->plt_got_eh_frame
+ || s == htab->elf.sdynbss
+ || s == htab->elf.sdynrelro)
{
/* Strip these too. */
}
if (htab->plt_eh_frame != NULL
&& htab->plt_eh_frame->contents != NULL)
{
- memcpy (htab->plt_eh_frame->contents, elf_i386_eh_frame_plt,
- sizeof (elf_i386_eh_frame_plt));
+ 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)
{
/* Add some entries to the .dynamic section. We fill in the
&& ((indx = r_type - R_386_tls_offset) - R_386_ext
>= R_386_ext2 - R_386_ext))
{
- (*_bfd_error_handler)
+ _bfd_error_handler
+ /* xgettext:c-format */
(_("%B: unrecognized relocation (0x%x) in section `%A'"),
input_bfd, input_section, r_type);
bfd_set_error (bfd_error_bad_value);
- gotplt->output_section->vma
- gotplt->output_offset);
- if ((*(contents + rel->r_offset - 1) & 0xc7) == 0x5)
+ if (rel->r_offset > 1
+ && (*(contents + rel->r_offset - 1) & 0xc7) == 0x5
+ && *(contents + rel->r_offset - 2) != 0x8d)
{
if (bfd_link_pic (info))
goto disallow_got32;
else
name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
NULL);
- (*_bfd_error_handler)
+ _bfd_error_handler
+ /* xgettext:c-format */
(_("%B: relocation %s against STT_GNU_IFUNC "
"symbol `%s' isn't supported"), input_bfd,
howto->name, name);
relocation = (htab->elf.sgot->output_section->vma
+ htab->elf.sgot->output_offset + off);
- if ((*(contents + rel->r_offset - 1) & 0xc7) == 0x5)
+ if (rel->r_offset > 1
+ && (*(contents + rel->r_offset - 1) & 0xc7) == 0x5
+ && *(contents + rel->r_offset - 2) != 0x8d)
{
if (bfd_link_pic (info))
{
/* For PIC, disallow R_386_GOT32 without a base
- register since we don't know what the GOT base
- is. */
+ register, except for "lea foo@GOT, %reg", since
+ we don't know what the GOT base is. */
const char *name;
disallow_got32:
- if (h == NULL)
+ if (h == NULL || h->root.root.string == NULL)
name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
NULL);
else
name = h->root.root.string;
- (*_bfd_error_handler)
+ _bfd_error_handler
+ /* xgettext:c-format */
(_("%B: direct GOT relocation %s against `%s' without base register can not be used when making a shared object"),
input_bfd, howto->name, name);
bfd_set_error (bfd_error_bad_value);
break;
}
- (*_bfd_error_handler)
+ _bfd_error_handler
+ /* xgettext:c-format */
(_("%B: 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);
|| h->type == STT_OBJECT)
&& ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
{
- (*_bfd_error_handler)
+ _bfd_error_handler
+ /* xgettext:c-format */
(_("%B: 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",
&& _bfd_elf_section_offset (output_bfd, info, input_section,
rel->r_offset) != (bfd_vma) -1)
{
- (*_bfd_error_handler)
+ _bfd_error_handler
+ /* xgettext:c-format */
(_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
input_bfd,
input_section,
(bfd_vma) 0, input_bfd, input_section, rel->r_offset);
else
{
- (*_bfd_error_handler)
+ _bfd_error_handler
+ /* xgettext:c-format */
(_("%B(%A+0x%lx): reloc against `%s': error %d"),
input_bfd, input_section,
(long) rel->r_offset, name, (int) r);
if (h->needs_copy)
{
Elf_Internal_Rela rel;
+ 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->srelbss == NULL)
+ || htab->elf.srelbss == NULL
+ || htab->elf.sreldynrelro == NULL)
abort ();
rel.r_offset = (h->root.u.def.value
+ h->root.u.def.section->output_section->vma
+ h->root.u.def.section->output_offset);
rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY);
- elf_append_rel (output_bfd, htab->srelbss, &rel);
+ if (h->root.u.def.section == htab->elf.sdynrelro)
+ s = htab->elf.sreldynrelro;
+ else
+ s = htab->elf.srelbss;
+ elf_append_rel (output_bfd, s, &rel);
}
return TRUE;
s = htab->elf.srelplt;
dyn.d_un.d_val = s->size;
break;
-
- case DT_RELSZ:
- /* My reading of the SVR4 ABI indicates that the
- procedure linkage table relocs (DT_JMPREL) should be
- included in the overall relocs (DT_REL). This is
- what Solaris does. However, UnixWare can not handle
- that case. Therefore, we override the DT_RELSZ entry
- here to make it not include the JMPREL relocs. */
- s = htab->elf.srelplt;
- if (s == NULL)
- continue;
- dyn.d_un.d_val -= s->size;
- break;
-
- case DT_REL:
- /* We may not be using the standard ELF linker script.
- If .rel.plt is the first .rel section, we adjust
- DT_REL to not include it. */
- s = htab->elf.srelplt;
- if (s == NULL)
- continue;
- if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
- continue;
- dyn.d_un.d_ptr += s->size;
- break;
}
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
{
if (bfd_is_abs_section (htab->elf.sgotplt->output_section))
{
- (*_bfd_error_handler)
+ _bfd_error_handler
(_("discarded output section: `%A'"), htab->elf.sgotplt);
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;
#define elf_backend_want_plt_sym 0
#define elf_backend_got_header_size 12
#define elf_backend_plt_alignment 4
+#define elf_backend_dtrel_excludes_plt 1
#define elf_backend_extern_protected_data 1
#define elf_backend_caches_rawsize 1
+#define elf_backend_want_dynrelro 1
/* Support RELA for objdump of prelink objects. */
#define elf_info_to_howto elf_i386_info_to_howto_rel
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 =
projects / deliverable / binutils-gdb.git / blobdiff