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Projet_SETI_RISC-V/riscv-gnu-toolchain/gdb/bfd/elf-properties.c
higepi 6c0debd407 projet
2023-03-06 14:48:14 +01:00

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/* ELF program property support.
Copyright (C) 2017-2022 Free Software Foundation, Inc.
This file is part of BFD, the Binary File Descriptor library.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
MA 02110-1301, USA. */
/* GNU program property draft is at:
https://github.com/hjl-tools/linux-abi/wiki/property-draft.pdf
*/
#include "sysdep.h"
#include "bfd.h"
#include "libbfd.h"
#include "elf-bfd.h"
/* Get a property, allocate a new one if needed. */
elf_property *
_bfd_elf_get_property (bfd *abfd, unsigned int type, unsigned int datasz)
{
elf_property_list *p, **lastp;
if (bfd_get_flavour (abfd) != bfd_target_elf_flavour)
{
/* Never should happen. */
abort ();
}
/* Keep the property list in order of type. */
lastp = &elf_properties (abfd);
for (p = *lastp; p; p = p->next)
{
/* Reuse the existing entry. */
if (type == p->property.pr_type)
{
if (datasz > p->property.pr_datasz)
{
/* This can happen when mixing 32-bit and 64-bit objects. */
p->property.pr_datasz = datasz;
}
return &p->property;
}
else if (type < p->property.pr_type)
break;
lastp = &p->next;
}
p = (elf_property_list *) bfd_alloc (abfd, sizeof (*p));
if (p == NULL)
{
_bfd_error_handler (_("%pB: out of memory in _bfd_elf_get_property"),
abfd);
_exit (EXIT_FAILURE);
}
memset (p, 0, sizeof (*p));
p->property.pr_type = type;
p->property.pr_datasz = datasz;
p->next = *lastp;
*lastp = p;
return &p->property;
}
/* Parse GNU properties. */
bool
_bfd_elf_parse_gnu_properties (bfd *abfd, Elf_Internal_Note *note)
{
const struct elf_backend_data *bed = get_elf_backend_data (abfd);
unsigned int align_size = bed->s->elfclass == ELFCLASS64 ? 8 : 4;
bfd_byte *ptr = (bfd_byte *) note->descdata;
bfd_byte *ptr_end = ptr + note->descsz;
if (note->descsz < 8 || (note->descsz % align_size) != 0)
{
bad_size:
_bfd_error_handler
(_("warning: %pB: corrupt GNU_PROPERTY_TYPE (%ld) size: %#lx"),
abfd, note->type, note->descsz);
return false;
}
while (ptr != ptr_end)
{
unsigned int type;
unsigned int datasz;
elf_property *prop;
if ((size_t) (ptr_end - ptr) < 8)
goto bad_size;
type = bfd_h_get_32 (abfd, ptr);
datasz = bfd_h_get_32 (abfd, ptr + 4);
ptr += 8;
if (datasz > (size_t) (ptr_end - ptr))
{
_bfd_error_handler
(_("warning: %pB: corrupt GNU_PROPERTY_TYPE (%ld) type (0x%x) datasz: 0x%x"),
abfd, note->type, type, datasz);
/* Clear all properties. */
elf_properties (abfd) = NULL;
return false;
}
if (type >= GNU_PROPERTY_LOPROC)
{
if (bed->elf_machine_code == EM_NONE)
{
/* Ignore processor-specific properties with generic ELF
target vector. They should be handled by the matching
ELF target vector. */
goto next;
}
else if (type < GNU_PROPERTY_LOUSER
&& bed->parse_gnu_properties)
{
enum elf_property_kind kind
= bed->parse_gnu_properties (abfd, type, ptr, datasz);
if (kind == property_corrupt)
{
/* Clear all properties. */
elf_properties (abfd) = NULL;
return false;
}
else if (kind != property_ignored)
goto next;
}
}
else
{
switch (type)
{
case GNU_PROPERTY_STACK_SIZE:
if (datasz != align_size)
{
_bfd_error_handler
(_("warning: %pB: corrupt stack size: 0x%x"),
abfd, datasz);
/* Clear all properties. */
elf_properties (abfd) = NULL;
return false;
}
prop = _bfd_elf_get_property (abfd, type, datasz);
if (datasz == 8)
prop->u.number = bfd_h_get_64 (abfd, ptr);
else
prop->u.number = bfd_h_get_32 (abfd, ptr);
prop->pr_kind = property_number;
goto next;
case GNU_PROPERTY_NO_COPY_ON_PROTECTED:
if (datasz != 0)
{
_bfd_error_handler
(_("warning: %pB: corrupt no copy on protected size: 0x%x"),
abfd, datasz);
/* Clear all properties. */
elf_properties (abfd) = NULL;
return false;
}
prop = _bfd_elf_get_property (abfd, type, datasz);
elf_has_no_copy_on_protected (abfd) = true;
prop->pr_kind = property_number;
goto next;
default:
if ((type >= GNU_PROPERTY_UINT32_AND_LO
&& type <= GNU_PROPERTY_UINT32_AND_HI)
|| (type >= GNU_PROPERTY_UINT32_OR_LO
&& type <= GNU_PROPERTY_UINT32_OR_HI))
{
if (datasz != 4)
{
_bfd_error_handler
(_("error: %pB: <corrupt property (0x%x) size: 0x%x>"),
abfd, type, datasz);
/* Clear all properties. */
elf_properties (abfd) = NULL;
return false;
}
prop = _bfd_elf_get_property (abfd, type, datasz);
prop->u.number |= bfd_h_get_32 (abfd, ptr);
prop->pr_kind = property_number;
if (type == GNU_PROPERTY_1_NEEDED
&& ((prop->u.number
& GNU_PROPERTY_1_NEEDED_INDIRECT_EXTERN_ACCESS)
!= 0))
{
elf_has_indirect_extern_access (abfd) = true;
/* GNU_PROPERTY_NO_COPY_ON_PROTECTED is implied. */
elf_has_no_copy_on_protected (abfd) = true;
}
goto next;
}
break;
}
}
_bfd_error_handler
(_("warning: %pB: unsupported GNU_PROPERTY_TYPE (%ld) type: 0x%x"),
abfd, note->type, type);
next:
ptr += (datasz + (align_size - 1)) & ~ (align_size - 1);
}
return true;
}
/* Merge 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. */
static bool
elf_merge_gnu_properties (struct bfd_link_info *info, bfd *abfd, bfd *bbfd,
elf_property *aprop, elf_property *bprop)
{
const struct elf_backend_data *bed = get_elf_backend_data (abfd);
unsigned int pr_type = aprop != NULL ? aprop->pr_type : bprop->pr_type;
unsigned int number;
bool updated;
if (bed->merge_gnu_properties != NULL
&& pr_type >= GNU_PROPERTY_LOPROC
&& pr_type < GNU_PROPERTY_LOUSER)
return bed->merge_gnu_properties (info, abfd, bbfd, aprop, bprop);
switch (pr_type)
{
case GNU_PROPERTY_STACK_SIZE:
if (aprop != NULL && bprop != NULL)
{
if (bprop->u.number > aprop->u.number)
{
aprop->u.number = bprop->u.number;
return true;
}
break;
}
/* FALLTHROUGH */
case GNU_PROPERTY_NO_COPY_ON_PROTECTED:
/* Return TRUE if APROP is NULL to indicate that BPROP should
be added to ABFD. */
return aprop == NULL;
default:
updated = false;
if (pr_type >= GNU_PROPERTY_UINT32_OR_LO
&& pr_type <= GNU_PROPERTY_UINT32_OR_HI)
{
if (aprop != NULL && bprop != NULL)
{
number = aprop->u.number;
aprop->u.number = number | bprop->u.number;
/* Remove the property if all bits are empty. */
if (aprop->u.number == 0)
{
aprop->pr_kind = property_remove;
updated = true;
}
else
updated = number != (unsigned int) aprop->u.number;
}
else
{
/* Only one of APROP and BPROP can be NULL. */
if (aprop != NULL)
{
if (aprop->u.number == 0)
{
/* Remove APROP if all bits are empty. */
aprop->pr_kind = property_remove;
updated = true;
}
}
else
{
/* Return TRUE if APROP is NULL and all bits of BPROP
aren't empty to indicate that BPROP should be added
to ABFD. */
updated = bprop->u.number != 0;
}
}
return updated;
}
else if (pr_type >= GNU_PROPERTY_UINT32_AND_LO
&& pr_type <= GNU_PROPERTY_UINT32_AND_HI)
{
/* Only one of APROP and BPROP can be NULL:
1. APROP & BPROP when both APROP and BPROP aren't NULL.
2. If APROP is NULL, remove x86 feature.
3. Otherwise, do nothing.
*/
if (aprop != NULL && bprop != NULL)
{
number = aprop->u.number;
aprop->u.number = number & bprop->u.number;
updated = number != (unsigned int) aprop->u.number;
/* Remove the property if all feature bits are cleared. */
if (aprop->u.number == 0)
aprop->pr_kind = property_remove;
}
else
{
/* There should be no AND properties since some input
doesn't have them. */
if (aprop != NULL)
{
aprop->pr_kind = property_remove;
updated = true;
}
}
return updated;
}
/* Never should happen. */
abort ();
}
return false;
}
/* Return the property of TYPE on *LISTP and remove it from *LISTP if RM is
true. Return NULL if not found. */
static elf_property *
elf_find_and_remove_property (elf_property_list **listp,
unsigned int type, bool rm)
{
elf_property_list *list;
for (list = *listp; list; list = list->next)
{
if (type == list->property.pr_type)
{
/* Remove this property. */
if (rm)
*listp = list->next;
return &list->property;
}
else if (type < list->property.pr_type)
break;
listp = &list->next;
}
return NULL;
}
/* Merge GNU property list *LISTP in ABFD with FIRST_PBFD. */
static void
elf_merge_gnu_property_list (struct bfd_link_info *info, bfd *first_pbfd,
bfd *abfd, elf_property_list **listp)
{
elf_property_list *p, **lastp;
elf_property *pr;
bool number_p;
bfd_vma number = 0;
/* Merge each GNU property in FIRST_PBFD with the one on *LISTP. */
lastp = &elf_properties (first_pbfd);
for (p = *lastp; p; p = p->next)
if (p->property.pr_kind != property_remove)
{
if (p->property.pr_kind == property_number)
{
number_p = true;
number = p->property.u.number;
}
else
number_p = false;
pr = elf_find_and_remove_property (listp, p->property.pr_type,
true);
/* Pass NULL to elf_merge_gnu_properties for the property which
isn't on *LISTP. */
elf_merge_gnu_properties (info, first_pbfd, abfd, &p->property, pr);
if (p->property.pr_kind == property_remove)
{
if (info->has_map_file)
{
if (number_p)
{
if (pr != NULL)
info->callbacks->minfo
(_("Removed property %W to merge %pB (0x%v) "
"and %pB (0x%v)\n"),
(bfd_vma) p->property.pr_type, first_pbfd,
number, abfd, pr->u.number);
else
info->callbacks->minfo
(_("Removed property %W to merge %pB (0x%v) "
"and %pB (not found)\n"),
(bfd_vma) p->property.pr_type, first_pbfd,
number, abfd);
}
else
{
if (pr != NULL)
info->callbacks->minfo
(_("Removed property %W to merge %pB and %pB\n"),
(bfd_vma) p->property.pr_type, first_pbfd, abfd);
else
info->callbacks->minfo
(_("Removed property %W to merge %pB and %pB "
"(not found)\n"),
(bfd_vma) p->property.pr_type, first_pbfd, abfd);
}
}
/* Remove this property. */
*lastp = p->next;
continue;
}
else if (number_p)
{
if (pr != NULL)
{
if (p->property.u.number != number
|| p->property.u.number != pr->u.number)
info->callbacks->minfo
(_("Updated property %W (0x%v) to merge %pB (0x%v) "
"and %pB (0x%v)\n"),
(bfd_vma) p->property.pr_type, p->property.u.number,
first_pbfd, number, abfd, pr->u.number);
}
else
{
if (p->property.u.number != number)
info->callbacks->minfo
(_("Updated property %W (%v) to merge %pB (0x%v) "
"and %pB (not found)\n"),
(bfd_vma) p->property.pr_type, p->property.u.number,
first_pbfd, number, abfd);
}
}
lastp = &p->next;
}
/* Merge the remaining properties on *LISTP with FIRST_PBFD. */
for (p = *listp; p != NULL; p = p->next)
{
if (p->property.pr_kind == property_number)
{
number_p = true;
number = p->property.u.number;
}
else
number_p = false;
if (elf_merge_gnu_properties (info, first_pbfd, abfd, NULL, &p->property))
{
if (p->property.pr_type == GNU_PROPERTY_NO_COPY_ON_PROTECTED)
elf_has_no_copy_on_protected (first_pbfd) = true;
pr = _bfd_elf_get_property (first_pbfd, p->property.pr_type,
p->property.pr_datasz);
/* It must be a new property. */
if (pr->pr_kind != property_unknown)
abort ();
/* Add a new property. */
*pr = p->property;
}
else
{
pr = elf_find_and_remove_property (&elf_properties (first_pbfd),
p->property.pr_type,
false);
if (pr == NULL)
{
if (number_p)
info->callbacks->minfo
(_("Removed property %W to merge %pB (not found) and "
"%pB (0x%v)\n"),
(bfd_vma) p->property.pr_type, first_pbfd, abfd,
number);
else
info->callbacks->minfo
(_("Removed property %W to merge %pB and %pB\n"),
(bfd_vma) p->property.pr_type, first_pbfd, abfd);
}
else if (pr->pr_kind != property_remove)
abort ();
}
}
}
/* Get GNU property section size. */
static bfd_size_type
elf_get_gnu_property_section_size (elf_property_list *list,
unsigned int align_size)
{
bfd_size_type size;
unsigned int descsz;
/* Compute the output section size. */
descsz = offsetof (Elf_External_Note, name[sizeof "GNU"]);
descsz = (descsz + 3) & -(unsigned int) 4;
size = descsz;
for (; list != NULL; list = list->next)
{
unsigned int datasz;
/* Check if this property should be skipped. */
if (list->property.pr_kind == property_remove)
continue;
/* There are 4 byte type + 4 byte datasz for each property. */
if (list->property.pr_type == GNU_PROPERTY_STACK_SIZE)
datasz = align_size;
else
datasz = list->property.pr_datasz;
size += 4 + 4 + datasz;
/* Align each property. */
size = (size + (align_size - 1)) & ~(align_size - 1);
}
return size;
}
/* Write GNU properties. */
static void
elf_write_gnu_properties (struct bfd_link_info *info,
bfd *abfd, bfd_byte *contents,
elf_property_list *list, unsigned int size,
unsigned int align_size)
{
unsigned int descsz;
unsigned int datasz;
Elf_External_Note *e_note;
e_note = (Elf_External_Note *) contents;
descsz = offsetof (Elf_External_Note, name[sizeof "GNU"]);
descsz = (descsz + 3) & -(unsigned int) 4;
bfd_h_put_32 (abfd, sizeof "GNU", &e_note->namesz);
bfd_h_put_32 (abfd, size - descsz, &e_note->descsz);
bfd_h_put_32 (abfd, NT_GNU_PROPERTY_TYPE_0, &e_note->type);
memcpy (e_note->name, "GNU", sizeof "GNU");
size = descsz;
for (; list != NULL; list = list->next)
{
/* Check if this property should be skipped. */
if (list->property.pr_kind == property_remove)
continue;
/* There are 4 byte type + 4 byte datasz for each property. */
if (list->property.pr_type == GNU_PROPERTY_STACK_SIZE)
datasz = align_size;
else
datasz = list->property.pr_datasz;
bfd_h_put_32 (abfd, list->property.pr_type, contents + size);
bfd_h_put_32 (abfd, datasz, contents + size + 4);
size += 4 + 4;
/* Write out property value. */
switch (list->property.pr_kind)
{
case property_number:
switch (datasz)
{
default:
/* Never should happen. */
abort ();
case 0:
break;
case 4:
/* Save the pointer to GNU_PROPERTY_1_NEEDED so that it
can be updated later if needed. */
if (info != NULL
&& list->property.pr_type == GNU_PROPERTY_1_NEEDED)
info->needed_1_p = contents + size;
bfd_h_put_32 (abfd, list->property.u.number,
contents + size);
break;
case 8:
bfd_h_put_64 (abfd, list->property.u.number,
contents + size);
break;
}
break;
default:
/* Never should happen. */
abort ();
}
size += datasz;
/* Align each property. */
size = (size + (align_size - 1)) & ~ (align_size - 1);
}
}
/* Set up GNU properties. Return the first relocatable ELF input with
GNU properties if found. Otherwise, return NULL. */
bfd *
_bfd_elf_link_setup_gnu_properties (struct bfd_link_info *info)
{
bfd *abfd, *first_pbfd = NULL, *elf_bfd = NULL;
elf_property_list *list;
asection *sec;
bool has_properties = false;
const struct elf_backend_data *bed
= get_elf_backend_data (info->output_bfd);
unsigned int elfclass = bed->s->elfclass;
int elf_machine_code = bed->elf_machine_code;
elf_property *p;
/* Find the first relocatable ELF input with GNU properties. */
for (abfd = info->input_bfds; abfd != NULL; abfd = abfd->link.next)
if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
&& (abfd->flags & DYNAMIC) == 0
&& (elf_machine_code
== get_elf_backend_data (abfd)->elf_machine_code)
&& (elfclass == get_elf_backend_data (abfd)->s->elfclass))
{
/* Ignore GNU properties from ELF objects with different machine
code or class. Also skip objects without a GNU_PROPERTY note
section. */
elf_bfd = abfd;
if (elf_properties (abfd) != NULL)
{
has_properties = true;
if (bfd_get_section_by_name (abfd,
NOTE_GNU_PROPERTY_SECTION_NAME)
!= NULL)
{
/* Keep .note.gnu.property section in FIRST_PBFD. */
first_pbfd = abfd;
break;
}
}
}
if (info->indirect_extern_access > 0 && elf_bfd != NULL)
{
/* Support -z indirect-extern-access. */
if (first_pbfd == NULL)
{
sec = bfd_make_section_with_flags (elf_bfd,
NOTE_GNU_PROPERTY_SECTION_NAME,
(SEC_ALLOC
| SEC_LOAD
| SEC_IN_MEMORY
| SEC_READONLY
| SEC_HAS_CONTENTS
| SEC_DATA));
if (sec == NULL)
info->callbacks->einfo (_("%F%P: failed to create GNU property section\n"));
if (!bfd_set_section_alignment (sec,
elfclass == ELFCLASS64 ? 3 : 2))
info->callbacks->einfo (_("%F%pA: failed to align section\n"),
sec);
elf_section_type (sec) = SHT_NOTE;
first_pbfd = elf_bfd;
has_properties = true;
}
p = _bfd_elf_get_property (first_pbfd, GNU_PROPERTY_1_NEEDED, 4);
if (p->pr_kind == property_unknown)
{
/* Create GNU_PROPERTY_1_NEEDED. */
p->u.number
= GNU_PROPERTY_1_NEEDED_INDIRECT_EXTERN_ACCESS;
p->pr_kind = property_number;
}
else
p->u.number
|= GNU_PROPERTY_1_NEEDED_INDIRECT_EXTERN_ACCESS;
}
/* Do nothing if there is no .note.gnu.property section. */
if (!has_properties)
return NULL;
/* Merge .note.gnu.property sections. */
info->callbacks->minfo (_("\n"));
info->callbacks->minfo (_("Merging program properties\n"));
info->callbacks->minfo (_("\n"));
for (abfd = info->input_bfds; abfd != NULL; abfd = abfd->link.next)
if (abfd != first_pbfd
&& (abfd->flags & (DYNAMIC | BFD_PLUGIN | BFD_LINKER_CREATED)) == 0)
{
elf_property_list *null_ptr = NULL;
elf_property_list **listp = &null_ptr;
/* Merge .note.gnu.property section in relocatable ELF input. */
if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
{
list = elf_properties (abfd);
/* Ignore GNU properties from ELF objects with different
machine code. */
if (list != NULL
&& (elf_machine_code
== get_elf_backend_data (abfd)->elf_machine_code))
listp = &elf_properties (abfd);
}
else
list = NULL;
/* Merge properties with FIRST_PBFD. FIRST_PBFD can be NULL
when all properties are from ELF objects with different
machine code or class. */
if (first_pbfd != NULL)
elf_merge_gnu_property_list (info, first_pbfd, abfd, listp);
if (list != NULL)
{
/* Discard the .note.gnu.property section in this bfd. */
sec = bfd_get_section_by_name (abfd,
NOTE_GNU_PROPERTY_SECTION_NAME);
if (sec != NULL)
sec->output_section = bfd_abs_section_ptr;
}
}
/* Rewrite .note.gnu.property section so that GNU properties are
always sorted by type even if input GNU properties aren't sorted. */
if (first_pbfd != NULL)
{
bfd_size_type size;
bfd_byte *contents;
unsigned int align_size = elfclass == ELFCLASS64 ? 8 : 4;
sec = bfd_get_section_by_name (first_pbfd,
NOTE_GNU_PROPERTY_SECTION_NAME);
BFD_ASSERT (sec != NULL);
/* Update stack size in .note.gnu.property with -z stack-size=N
if N > 0. */
if (info->stacksize > 0)
{
bfd_vma stacksize = info->stacksize;
p = _bfd_elf_get_property (first_pbfd, GNU_PROPERTY_STACK_SIZE,
align_size);
if (p->pr_kind == property_unknown)
{
/* Create GNU_PROPERTY_STACK_SIZE. */
p->u.number = stacksize;
p->pr_kind = property_number;
}
else if (stacksize > p->u.number)
p->u.number = stacksize;
}
else if (elf_properties (first_pbfd) == NULL)
{
/* Discard .note.gnu.property section if all properties have
been removed. */
sec->output_section = bfd_abs_section_ptr;
return NULL;
}
/* Fix up GNU properties. */
if (bed->fixup_gnu_properties)
bed->fixup_gnu_properties (info, &elf_properties (first_pbfd));
if (elf_properties (first_pbfd) == NULL)
{
/* Discard .note.gnu.property section if all properties have
been removed. */
sec->output_section = bfd_abs_section_ptr;
return NULL;
}
/* Compute the section size. */
list = elf_properties (first_pbfd);
size = elf_get_gnu_property_section_size (list, align_size);
/* Update .note.gnu.property section now. */
sec->size = size;
contents = (bfd_byte *) bfd_zalloc (first_pbfd, size);
if (info->indirect_extern_access <= 0)
{
/* Get GNU_PROPERTY_1_NEEDED properties. */
p = elf_find_and_remove_property (&elf_properties (first_pbfd),
GNU_PROPERTY_1_NEEDED, false);
if (p != NULL)
{
if (info->indirect_extern_access < 0)
{
/* Set indirect_extern_access to 1 to indicate that
it is turned on by input properties. */
if ((p->u.number
& GNU_PROPERTY_1_NEEDED_INDIRECT_EXTERN_ACCESS)
!= 0)
info->indirect_extern_access = 1;
}
else
/* Turn off indirect external access. */
p->u.number
&= ~GNU_PROPERTY_1_NEEDED_INDIRECT_EXTERN_ACCESS;
}
}
elf_write_gnu_properties (info, first_pbfd, contents, list, size,
align_size);
/* Cache the section contents for elf_link_input_bfd. */
elf_section_data (sec)->this_hdr.contents = contents;
/* If GNU_PROPERTY_NO_COPY_ON_PROTECTED is set, protected data
symbol is defined in the shared object. */
if (elf_has_no_copy_on_protected (first_pbfd))
info->extern_protected_data = false;
if (info->indirect_extern_access > 0)
{
/* For indirect external access, don't generate copy
relocations. NB: Set to nocopyreloc to 2 to indicate
that it is implied by indirect_extern_access. */
info->nocopyreloc = 2;
info->extern_protected_data = false;
}
}
return first_pbfd;
}
/* Convert GNU property size. */
bfd_size_type
_bfd_elf_convert_gnu_property_size (bfd *ibfd, bfd *obfd)
{
unsigned int align_size;
const struct elf_backend_data *bed;
elf_property_list *list = elf_properties (ibfd);
bed = get_elf_backend_data (obfd);
align_size = bed->s->elfclass == ELFCLASS64 ? 8 : 4;
/* Get the output .note.gnu.property section size. */
return elf_get_gnu_property_section_size (list, align_size);
}
/* Convert GNU properties. */
bool
_bfd_elf_convert_gnu_properties (bfd *ibfd, asection *isec,
bfd *obfd, bfd_byte **ptr,
bfd_size_type *ptr_size)
{
unsigned int size;
bfd_byte *contents;
unsigned int align_shift;
const struct elf_backend_data *bed;
elf_property_list *list = elf_properties (ibfd);
bed = get_elf_backend_data (obfd);
align_shift = bed->s->elfclass == ELFCLASS64 ? 3 : 2;
/* Get the output .note.gnu.property section size. */
size = bfd_section_size (isec->output_section);
/* Update the output .note.gnu.property section alignment. */
bfd_set_section_alignment (isec->output_section, align_shift);
if (size > bfd_section_size (isec))
{
contents = (bfd_byte *) bfd_malloc (size);
if (contents == NULL)
return false;
free (*ptr);
*ptr = contents;
}
else
contents = *ptr;
*ptr_size = size;
/* Generate the output .note.gnu.property section. */
elf_write_gnu_properties (NULL, ibfd, contents, list, size,
1 << align_shift);
return true;
}
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