/* X86-64 specific support for ELF
- Copyright (C) 2000-2021 Free Software Foundation, Inc.
+ Copyright (C) 2000-2022 Free Software Foundation, Inc.
Contributed by Jan Hubicka <jh@suse.cz>.
This file is part of BFD, the Binary File Descriptor library.
#include "libiberty.h"
#include "opcode/i386.h"
-#include "elf/x86-64.h"
#ifdef CORE_HEADER
#include <stdarg.h>
false)
};
-#define X86_PCREL_TYPE_P(TYPE) \
- ( ((TYPE) == R_X86_64_PC8) \
- || ((TYPE) == R_X86_64_PC16) \
- || ((TYPE) == R_X86_64_PC32) \
- || ((TYPE) == R_X86_64_PC32_BND) \
- || ((TYPE) == R_X86_64_PC64))
-
-#define X86_SIZE_TYPE_P(TYPE) \
- ((TYPE) == R_X86_64_SIZE32 || (TYPE) == R_X86_64_SIZE64)
-
/* Map BFD relocs to the x86_64 elf relocs. */
struct elf_reloc_map
{
}
/* We checked the transition before when we were called from
- elf_x86_64_check_relocs. We only want to check the new
+ elf_x86_64_scan_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;
return true;
}
-/* Rename some of the generic section flags to better document how they
- are used here. */
-#define check_relocs_failed sec_flg0
-
static bool
elf_x86_64_need_pic (struct bfd_link_info *info,
bfd *input_bfd, asection *sec,
}
/* 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. */
+ calculate needed space in the global offset table, and procedure
+ linkage table. */
static bool
-elf_x86_64_check_relocs (bfd *abfd, struct bfd_link_info *info,
- asection *sec,
- const Elf_Internal_Rela *relocs)
+elf_x86_64_scan_relocs (bfd *abfd, struct bfd_link_info *info,
+ asection *sec,
+ const Elf_Internal_Rela *relocs)
{
struct elf_x86_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;
bool converted;
converted = false;
- sreloc = NULL;
-
rel_end = relocs + sec->reloc_count;
for (rel = relocs; rel < rel_end; rel++)
{
{
bfd_signed_vma *local_got_refcounts;
+ if (!elf_x86_allocate_local_got_info (abfd,
+ symtab_hdr->sh_info))
+ goto error_return;
+
/* 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];
func_pointer_ref = true;
}
+ if (h->pointer_equality_needed
+ && h->type == STT_FUNC
+ && eh->def_protected
+ && elf_has_indirect_extern_access (h->root.u.def.section->owner))
+ {
+ /* Disallow non-canonical reference to canonical
+ protected function. */
+ _bfd_error_handler
+ /* xgettext:c-format */
+ (_("%pB: non-canonical reference to canonical "
+ "protected function `%s' in %pB"),
+ abfd, h->root.root.string,
+ h->root.u.def.section->owner);
+ bfd_set_error (bfd_error_bad_value);
+ goto error_return;
+ }
+
if (!func_pointer_ref)
{
/* If this reloc is in a read-only section, we might
size_reloc = false;
do_size:
if (!no_dynreloc
- && NEED_DYNAMIC_RELOCATION_P (info, true, h, sec, r_type,
+ && NEED_DYNAMIC_RELOCATION_P (true, info, true, h, sec,
+ r_type,
htab->pointer_r_type))
{
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)
- {
- sreloc = _bfd_elf_make_dynamic_reloc_section
- (sec, htab->elf.dynobj, ABI_64_P (abfd) ? 3 : 2,
- abfd, /*rela?*/ true);
-
- 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)
p->count += 1;
/* Count size relocation as PC-relative relocation. */
- if (X86_PCREL_TYPE_P (r_type) || size_reloc)
+ if (X86_PCREL_TYPE_P (true, r_type) || size_reloc)
p->pc_count += 1;
}
break;
return false;
}
+static bool
+elf_x86_64_always_size_sections (bfd *output_bfd,
+ struct bfd_link_info *info)
+{
+ bfd *abfd;
+
+ /* Scan relocations after rel_from_abs has been set on __ehdr_start. */
+ for (abfd = info->input_bfds;
+ abfd != (bfd *) NULL;
+ abfd = abfd->link.next)
+ if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
+ && !_bfd_elf_link_iterate_on_relocs (abfd, info,
+ elf_x86_64_scan_relocs))
+ return false;
+
+ return _bfd_x86_elf_always_size_sections (output_bfd, info);
+}
+
/* Return the relocation value for @tpoff relocation
if STT_TLS virtual address is ADDRESS. */
unsigned int plt_entry_size;
bool status;
- /* Skip if check_relocs failed. */
+ /* Skip if check_relocs or scan_relocs failed. */
if (input_section->check_relocs_failed)
return false;
as -1 | 1 still is -1. */
h->got.offset |= 1;
- if (GENERATE_RELATIVE_RELOC_P (info, h))
+ /* NB: Don't generate relative relocation here if
+ it has been generated by DT_RELR. */
+ if (!info->enable_dt_relr
+ && GENERATE_RELATIVE_RELOC_P (info, h))
{
/* If this symbol isn't dynamic in PIC,
generate R_X86_64_RELATIVE here. */
/* NB: GOTPCREL relocations against local absolute
symbol store relocation value in the GOT slot
- without relative relocation. */
- if (bfd_link_pic (info)
+ without relative relocation. Don't generate
+ relative relocation here if it has been generated
+ by DT_RELR. */
+ if (!info->enable_dt_relr
+ && bfd_link_pic (info)
&& !(sym->st_shndx == SHN_ABS
&& (r_type == R_X86_64_GOTPCREL
|| r_type == R_X86_64_GOTPCRELX
|| eh->needs_copy
|| (h->root.type
== bfd_link_hash_undefined))
- && (X86_PCREL_TYPE_P (r_type)
- || X86_SIZE_TYPE_P (r_type)));
+ && (X86_PCREL_TYPE_P (true, r_type)
+ || X86_SIZE_TYPE_P (true,
+ r_type)));
- if (GENERATE_DYNAMIC_RELOCATION_P (info, eh, r_type, sec,
+ if (GENERATE_DYNAMIC_RELOCATION_P (true, info, eh, r_type, sec,
need_copy_reloc_in_pie,
resolved_to_zero, false))
{
Elf_Internal_Rela outrel;
bool skip, relocate;
+ bool generate_dynamic_reloc = true;
asection *sreloc;
const char *relative_reloc_name = NULL;
if (skip)
memset (&outrel, 0, sizeof outrel);
- else if (COPY_INPUT_RELOC_P (info, h, r_type))
+ else if (COPY_INPUT_RELOC_P (true, info, h, r_type))
{
outrel.r_info = htab->r_info (h->dynindx, r_type);
outrel.r_addend = rel->r_addend;
&& htab->params->no_reloc_overflow_check))
{
relocate = true;
- outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE);
- outrel.r_addend = relocation + rel->r_addend;
- relative_reloc_name = "R_X86_64_RELATIVE";
+ /* NB: Don't generate relative relocation here if
+ it has been generated by DT_RELR. */
+ if (info->enable_dt_relr)
+ generate_dynamic_reloc = false;
+ else
+ {
+ outrel.r_info =
+ htab->r_info (0, R_X86_64_RELATIVE);
+ outrel.r_addend = relocation + rel->r_addend;
+ relative_reloc_name = "R_X86_64_RELATIVE";
+ }
}
else if (r_type == R_X86_64_64
&& !ABI_64_P (output_bfd))
}
}
- sreloc = elf_section_data (input_section)->sreloc;
-
- if (sreloc == NULL || sreloc->contents == NULL)
+ if (generate_dynamic_reloc)
{
- r = bfd_reloc_notsupported;
- goto check_relocation_error;
- }
+ sreloc = elf_section_data (input_section)->sreloc;
- if (relative_reloc_name
- && htab->params->report_relative_reloc)
- _bfd_x86_elf_link_report_relative_reloc
- (info, input_section, h, sym, relative_reloc_name,
- &outrel);
+ if (sreloc == NULL || sreloc->contents == NULL)
+ {
+ r = bfd_reloc_notsupported;
+ goto check_relocation_error;
+ }
- elf_append_rela (output_bfd, sreloc, &outrel);
+ if (relative_reloc_name
+ && htab->params->report_relative_reloc)
+ _bfd_x86_elf_link_report_relative_reloc
+ (info, input_section, h, sym,
+ relative_reloc_name, &outrel);
+
+ elf_append_rela (output_bfd, sreloc, &outrel);
+ }
/* If this reloc is against an external symbol, we do
not want to fiddle with the addend. Otherwise, we
Elf_Internal_Rela rela;
asection *relgot = htab->elf.srelgot;
const char *relative_reloc_name = NULL;
+ bool generate_dynamic_reloc = true;
/* This symbol has an entry in the global offset table. Set it
up. */
if (!SYMBOL_DEFINED_NON_SHARED_P (h))
return false;
BFD_ASSERT((h->got.offset & 1) != 0);
- rela.r_info = htab->r_info (0, R_X86_64_RELATIVE);
- rela.r_addend = (h->root.u.def.value
- + h->root.u.def.section->output_section->vma
- + h->root.u.def.section->output_offset);
- relative_reloc_name = "R_X86_64_RELATIVE";
+ if (info->enable_dt_relr)
+ generate_dynamic_reloc = false;
+ else
+ {
+ rela.r_info = htab->r_info (0, R_X86_64_RELATIVE);
+ rela.r_addend = (h->root.u.def.value
+ + h->root.u.def.section->output_section->vma
+ + h->root.u.def.section->output_offset);
+ relative_reloc_name = "R_X86_64_RELATIVE";
+ }
}
else
{
rela.r_addend = 0;
}
- if (relative_reloc_name != NULL
- && htab->params->report_relative_reloc)
- _bfd_x86_elf_link_report_relative_reloc
- (info, relgot, h, sym, relative_reloc_name, &rela);
+ if (generate_dynamic_reloc)
+ {
+ if (relative_reloc_name != NULL
+ && htab->params->report_relative_reloc)
+ _bfd_x86_elf_link_report_relative_reloc
+ (info, relgot, h, sym, relative_reloc_name, &rela);
- elf_append_rela (output_bfd, relgot, &rela);
+ elf_append_rela (output_bfd, relgot, &rela);
+ }
}
if (h->needs_copy)
#else
# define ELF_MAXPAGESIZE 0x200000
#endif
-#define ELF_MINPAGESIZE 0x1000
#define ELF_COMMONPAGESIZE 0x1000
#define elf_backend_can_gc_sections 1
elf_x86_64_reloc_name_lookup
#define elf_backend_relocs_compatible elf_x86_64_relocs_compatible
-#define elf_backend_check_relocs elf_x86_64_check_relocs
+#define elf_backend_always_size_sections elf_x86_64_always_size_sections
#define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
#define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections
#define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol
#undef elf_backend_strtab_flags
#undef elf_backend_copy_special_section_fields
-/* Intel L1OM support. */
-
-static bool
-elf64_l1om_elf_object_p (bfd *abfd)
-{
- /* Set the right machine number for an L1OM elf64 file. */
- bfd_default_set_arch_mach (abfd, bfd_arch_l1om, bfd_mach_l1om);
- return true;
-}
-
-#undef TARGET_LITTLE_SYM
-#define TARGET_LITTLE_SYM l1om_elf64_vec
-#undef TARGET_LITTLE_NAME
-#define TARGET_LITTLE_NAME "elf64-l1om"
-#undef ELF_ARCH
-#define ELF_ARCH bfd_arch_l1om
-
-#undef ELF_MACHINE_CODE
-#define ELF_MACHINE_CODE EM_L1OM
-
-#undef ELF_OSABI
-
-#undef elf64_bed
-#define elf64_bed elf64_l1om_bed
-
-#undef elf_backend_object_p
-#define elf_backend_object_p elf64_l1om_elf_object_p
-
-/* Restore defaults. */
-#undef ELF_MAXPAGESIZE
-#undef ELF_MINPAGESIZE
-#undef ELF_COMMONPAGESIZE
-#if DEFAULT_LD_Z_SEPARATE_CODE
-# define ELF_MAXPAGESIZE 0x1000
-#else
-# define ELF_MAXPAGESIZE 0x200000
-#endif
-#define ELF_MINPAGESIZE 0x1000
-#define ELF_COMMONPAGESIZE 0x1000
-#undef elf_backend_plt_alignment
-#define elf_backend_plt_alignment 4
-#undef ELF_TARGET_OS
-
-#include "elf64-target.h"
-
-/* FreeBSD L1OM support. */
-
-#undef TARGET_LITTLE_SYM
-#define TARGET_LITTLE_SYM l1om_elf64_fbsd_vec
-#undef TARGET_LITTLE_NAME
-#define TARGET_LITTLE_NAME "elf64-l1om-freebsd"
-
-#undef ELF_OSABI
-#define ELF_OSABI ELFOSABI_FREEBSD
-
-#undef elf64_bed
-#define elf64_bed elf64_l1om_fbsd_bed
-
-#include "elf64-target.h"
-
-/* Intel K1OM support. */
-
-static bool
-elf64_k1om_elf_object_p (bfd *abfd)
-{
- /* Set the right machine number for an K1OM elf64 file. */
- bfd_default_set_arch_mach (abfd, bfd_arch_k1om, bfd_mach_k1om);
- return true;
-}
-
-#undef TARGET_LITTLE_SYM
-#define TARGET_LITTLE_SYM k1om_elf64_vec
-#undef TARGET_LITTLE_NAME
-#define TARGET_LITTLE_NAME "elf64-k1om"
-#undef ELF_ARCH
-#define ELF_ARCH bfd_arch_k1om
-
-#undef ELF_MACHINE_CODE
-#define ELF_MACHINE_CODE EM_K1OM
-
-#undef ELF_OSABI
-
-#undef elf64_bed
-#define elf64_bed elf64_k1om_bed
-
-#undef elf_backend_object_p
-#define elf_backend_object_p elf64_k1om_elf_object_p
-
-#include "elf64-target.h"
-
-/* FreeBSD K1OM support. */
-
-#undef TARGET_LITTLE_SYM
-#define TARGET_LITTLE_SYM k1om_elf64_fbsd_vec
-#undef TARGET_LITTLE_NAME
-#define TARGET_LITTLE_NAME "elf64-k1om-freebsd"
-
-#undef ELF_OSABI
-#define ELF_OSABI ELFOSABI_FREEBSD
-
-#undef elf64_bed
-#define elf64_bed elf64_k1om_fbsd_bed
-
-#include "elf64-target.h"
-
/* 32bit x86-64 support. */
#undef TARGET_LITTLE_SYM
#undef ELF_MACHINE_CODE
#define ELF_MACHINE_CODE EM_X86_64
+#undef ELF_TARGET_OS
#undef ELF_OSABI
#define bfd_elf32_bfd_reloc_type_lookup \
projects / binutils-gdb.git / blobdiff