/* x86 specific support for ELF
- Copyright (C) 2017-2018 Free Software Foundation, Inc.
+ Copyright (C) 2017-2019 Free Software Foundation, Inc.
This file is part of BFD, the Binary File Descriptor library.
#include "bfdlink.h"
#include "libbfd.h"
#include "elf-bfd.h"
-#include "bfd_stdint.h"
#include "hashtab.h"
+#include "elf-linker-x86.h"
#define PLT_CIE_LENGTH 20
#define PLT_FDE_LENGTH 36
|| (ELF_ST_VISIBILITY ((H)->other) \
&& (H)->root.type == bfd_link_hash_undefweak))
+/* TRUE if this symbol isn't defined by a shared object. */
+#define SYMBOL_DEFINED_NON_SHARED_P(H) \
+ ((H)->def_regular \
+ || (H)->root.linker_def \
+ || (H)->root.ldscript_def \
+ || ((struct elf_x86_link_hash_entry *) (H))->linker_def \
+ || ELF_COMMON_DEF_P (H))
+
/* TRUE if relative relocation should be generated. GOT reference to
global symbol in PIC will lead to dynamic symbol. It becomes a
problem when "time" or "times" is defined as a variable in an
struct elf_x86_lazy_plt_layout
{
- /* The first entry in an absolute lazy procedure linkage table looks
- like this. */
+ /* The first entry in a lazy procedure linkage table looks like this. */
const bfd_byte *plt0_entry;
unsigned int plt0_entry_size; /* Size of PLT0 entry. */
- /* Later entries in an absolute lazy procedure linkage table look
- like this. */
+ /* Later entries in a lazy procedure linkage table look like this. */
const bfd_byte *plt_entry;
unsigned int plt_entry_size; /* Size of each PLT entry. */
+ /* The TLSDESC entry in a lazy procedure linkage table looks like
+ this. This is for x86-64 only. */
+ const bfd_byte *plt_tlsdesc_entry;
+ unsigned int plt_tlsdesc_entry_size; /* Size of TLSDESC entry. */
+
+ /* Offsets into the TLSDESC entry that are to be replaced with
+ GOT+8 and GOT+TDG. These are for x86-64 only. */
+ unsigned int plt_tlsdesc_got1_offset;
+ unsigned int plt_tlsdesc_got2_offset;
+
+ /* Offset of the end of the PC-relative instructions containing
+ plt_tlsdesc_got1_offset and plt_tlsdesc_got2_offset. These
+ are for x86-64 only. */
+ unsigned int plt_tlsdesc_got1_insn_end;
+ unsigned int plt_tlsdesc_got2_insn_end;
+
/* Offsets into plt0_entry that are to be replaced with GOT[1] and
GOT[2]. */
unsigned int plt0_got1_offset;
struct elf_x86_non_lazy_plt_layout
{
- /* Entries in an absolute non-lazy procedure linkage table look like
- this. */
+ /* Entries in a non-lazy procedure linkage table look like this. */
const bfd_byte *plt_entry;
- /* Entries in a PIC non-lazy procedure linkage table look like this. */
+ /* Entries in a PIC non-lazy procedure linkage table look like this.
+ This is only used for i386 where absolute PLT and PIC PLT are
+ different. */
const bfd_byte *pic_plt_entry;
unsigned int plt_entry_size; /* Size of each PLT entry. */
struct elf_x86_plt_layout
{
- /* The first entry in a lazy procedure linkage table looks like this.
- This is only used for i386 where absolute PLT0 and PIC PLT0 are
- different. */
+ /* The first entry in a lazy procedure linkage table looks like this. */
const bfd_byte *plt0_entry;
/* Entries in a procedure linkage table look like this. */
const bfd_byte *plt_entry;
This is only used for x86-64. */
unsigned int plt_got_insn_size;
+ /* Alignment of the .iplt section. */
+ unsigned int iplt_alignment;
+
/* .eh_frame covering the .plt section. */
const bfd_byte *eh_frame_plt;
unsigned int eh_frame_plt_size;
int dynamic_interpreter_size;
const char *dynamic_interpreter;
const char *tls_get_addr;
+
+ /* Options passed from the linker. */
+ struct elf_linker_x86_params *params;
};
/* Architecture-specific backend data for x86. */
(bfd *, unsigned int, bfd_byte *, unsigned int);
extern bfd_boolean _bfd_x86_elf_merge_gnu_properties
- (struct bfd_link_info *, bfd *, elf_property *, elf_property *);
+ (struct bfd_link_info *, bfd *, bfd *, elf_property *, elf_property *);
+
+extern void _bfd_x86_elf_link_fixup_gnu_properties
+ (struct bfd_link_info *, elf_property_list **);
extern bfd * _bfd_x86_elf_link_setup_gnu_properties
(struct bfd_link_info *, struct elf_x86_init_table *);
+extern void _bfd_x86_elf_link_fixup_ifunc_symbol
+ (struct bfd_link_info *, struct elf_x86_link_hash_table *,
+ struct elf_link_hash_entry *, Elf_Internal_Sym *sym);
+
#define bfd_elf64_mkobject \
_bfd_x86_elf_mkobject
#define bfd_elf32_mkobject \
_bfd_x86_elf_parse_gnu_properties
#define elf_backend_merge_gnu_properties \
_bfd_x86_elf_merge_gnu_properties
+#define elf_backend_fixup_gnu_properties \
+ _bfd_x86_elf_link_fixup_gnu_properties