/* x86 specific support for ELF
- Copyright (C) 2017-2019 Free Software Foundation, Inc.
+ Copyright (C) 2017-2020 Free Software Foundation, Inc.
This file is part of BFD, the Binary File Descriptor library.
Copy dynamic function pointer relocations. Don't generate dynamic
relocations against resolved undefined weak symbols in PIE, except
when PC32_RELOC is TRUE. Undefined weak symbol is bound locally
- when PIC is false. */
-#define GENERATE_DYNAMIC_RELOCATION_P(INFO, EH, R_TYPE, \
+ when PIC is false. Don't generate dynamic relocations against
+ non-preemptible absolute symbol. */
+#define GENERATE_DYNAMIC_RELOCATION_P(INFO, EH, R_TYPE, SEC, \
NEED_COPY_RELOC_IN_PIE, \
RESOLVED_TO_ZERO, PC32_RELOC) \
((bfd_link_pic (INFO) \
+ && !(bfd_is_abs_section (SEC) \
+ && ((EH) == NULL \
+ || SYMBOL_REFERENCES_LOCAL (INFO, &(EH)->elf))) \
&& !(NEED_COPY_RELOC_IN_PIE) \
&& ((EH) == NULL \
|| ((ELF_ST_VISIBILITY ((EH)->elf.other) == STV_DEFAULT \
&& (!(RESOLVED_TO_ZERO) || PC32_RELOC)) \
|| (EH)->elf.root.type != bfd_link_hash_undefweak)) \
- && ((!X86_PCREL_TYPE_P (R_TYPE) \
- && !X86_SIZE_TYPE_P (R_TYPE)) \
- || ! SYMBOL_CALLS_LOCAL ((INFO), &(EH)->elf))) \
+ && ((!X86_PCREL_TYPE_P (R_TYPE) && !X86_SIZE_TYPE_P (R_TYPE)) \
+ || ! SYMBOL_CALLS_LOCAL ((INFO), \
+ (struct elf_link_hash_entry *) (EH)))) \
|| (ELIMINATE_COPY_RELOCS \
&& !bfd_link_pic (INFO) \
&& (EH) != NULL \
((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))
+/* Return TRUE if the symbol described by a linker hash entry H is
+ going to be absolute. Similar to bfd_is_abs_symbol, but excluding
+ all linker-script defined symbols. */
+#define ABS_SYMBOL_P(H) \
+ (bfd_is_abs_symbol (&(H)->root) && !(H)->root.ldscript_def)
+
/* 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
executable, clashing with functions of the same name in libc. If a
symbol isn't undefined weak symbol, don't make it dynamic in PIC and
- generate relative relocation. */
+ generate relative relocation. Don't generate relative relocation
+ against non-preemptible absolute symbol. */
#define GENERATE_RELATIVE_RELOC_P(INFO, H) \
((H)->dynindx == -1 \
&& !(H)->forced_local \
&& (H)->root.type != bfd_link_hash_undefweak \
- && bfd_link_pic (INFO))
+ && bfd_link_pic (INFO) \
+ && !ABS_SYMBOL_P (H))
/* TRUE if this is a pointer reference to a local IFUNC. */
#define POINTER_LOCAL_IFUNC_P(INFO, H) \
{
struct elf_link_hash_entry elf;
- /* Track dynamic relocs copied for this symbol. */
- struct elf_dyn_relocs *dyn_relocs;
-
unsigned char tls_type;
/* Bit 0: Symbol has no GOT nor PLT relocations.
#define GOT_TLS_IE_NEG 6
#define GOT_TLS_IE_BOTH 7
#define GOT_TLS_GDESC 8
+#define GOT_ABS 9
#define GOT_TLS_GD_BOTH_P(type) \
((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
#define GOT_TLS_GD_P(type) \
#define elf_x86_hash_entry(ent) \
((struct elf_x86_link_hash_entry *)(ent))
-enum elf_x86_target_os
-{
- is_normal,
- is_solaris,
- is_vxworks,
- is_nacl
-};
-
/* x86 ELF linker hash table. */
struct elf_x86_link_hash_table
htab_t loc_hash_table;
void * loc_hash_memory;
- /* The offset into sgot of the GOT entry used by the PLT entry
- above. */
- bfd_vma tlsdesc_got;
-
/* The index of the next R_X86_64_JUMP_SLOT entry in .rela.plt. */
bfd_vma next_jump_slot_index;
/* The index of the next R_X86_64_IRELATIVE entry in .rela.plt. */
is only used for i386. */
bfd_vma next_tls_desc_index;
- /* The offset into splt of the PLT entry for the TLS descriptor
- resolver. Special values are 0, if not necessary (or not found
- to be necessary yet), and -1 if needed but not determined
- yet. This is only used for x86-64. */
- bfd_vma tlsdesc_plt;
-
/* Value used to fill the unused bytes of the first PLT entry. This
is only used for i386. */
bfd_byte plt0_pad_byte;
bfd_vma (*r_info) (bfd_vma, bfd_vma);
bfd_vma (*r_sym) (bfd_vma);
bfd_boolean (*is_reloc_section) (const char *);
- enum elf_target_id target_id;
- enum elf_x86_target_os target_os;
unsigned int sizeof_reloc;
unsigned int dt_reloc;
unsigned int dt_reloc_sz;
struct elf_linker_x86_params *params;
};
-/* Architecture-specific backend data for x86. */
-
-struct elf_x86_backend_data
-{
- /* Target system. */
- enum elf_x86_target_os target_os;
-};
-
-#define get_elf_x86_backend_data(abfd) \
- ((const struct elf_x86_backend_data *) \
- get_elf_backend_data (abfd)->arch_data)
-
struct elf_x86_init_table
{
/* The lazy PLT layout. */
long count;
};
+/* Set if a relocation is converted from a GOTPCREL relocation. */
+#define R_X86_64_converted_reloc_bit (1 << 7)
+
#define elf_x86_tdata(abfd) \
((struct elf_x86_obj_tdata *) (abfd)->tdata.any)
#define is_x86_elf(bfd, htab) \
(bfd_get_flavour (bfd) == bfd_target_elf_flavour \
&& elf_tdata (bfd) != NULL \
- && elf_object_id (bfd) == (htab)->target_id)
+ && elf_object_id (bfd) == (htab)->elf.hash_table_id)
extern bfd_boolean _bfd_x86_elf_mkobject
(bfd *);
extern bfd_boolean _bfd_x86_elf_link_check_relocs
(bfd *, struct bfd_link_info *);
+extern bfd_boolean _bfd_elf_x86_valid_reloc_p
+ (asection *, struct bfd_link_info *, struct elf_x86_link_hash_table *,
+ const Elf_Internal_Rela *, struct elf_link_hash_entry *,
+ Elf_Internal_Sym *, Elf_Internal_Shdr *, bfd_boolean *);
+
extern bfd_boolean _bfd_x86_elf_size_dynamic_sections
(bfd *, struct bfd_link_info *);
projects / deliverable / binutils-gdb.git / blobdiff