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ld: Unify STT_GNU_IFUNC handling

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Take STT_GNU_IFUNC handling scattered across targets and gather it in
the generic ELF linker.

bfd/

	PR ld/23238
	* elf-s390-common.c (elf_s390_add_symbol_hook): Removed.
	* elf32-arc.c (elf_arc_add_symbol_hook): Likewise.
	(elf_backend_add_symbol_hook): Likewise.
	* elf32-m68k.c (elf_m68k_add_symbol_hook): Likewise.
	(elf_backend_add_symbol_hook): Likewise.
	* elf32-s390.c (elf_backend_add_symbol_hook): Likewise.
	* elf32-sparc.c (elf32_sparc_add_symbol_hook): Likewise.
	(elf_backend_add_symbol_hook): Likewise.
	* elf64-s390.c (elf_backend_add_symbol_hook): Likewise.
	* elfxx-aarch64.c (_bfd_aarch64_elf_add_symbol_hook): Likewise.
	* elfxx-aarch64.h (_bfd_aarch64_elf_add_symbol_hook): Likewise.
	(elf_backend_add_symbol_hook): Likewise.
	* elf32-arm.c (elf32_arm_add_symbol_hook): Remove STT_GNU_IFUNC
	handling.
	* elf32-ppc.c (ppc_elf_add_symbol_hook): Likewise.
	* elf64-ppc.c (ppc64_elf_add_symbol_hook): Likewise.
	* elf64-sparc.c (elf64_sparc_add_symbol_hook): Likewise.
	* elflink.c (elf_link_add_object_symbols): Set
	elf_gnu_symbol_ifunc for STT_GNU_IFUNC symbols.

ld/

	PR ld/23238
	* testsuite/ld-ifunc/ifunc-26.d: New file.
	* testsuite/ld-ifunc/ifunc-26.s: Likewise.
	* testsuite/ld-ifunc/ifunc.exp: Run *.d tests without a
	working compiler.
This commit is contained in:
H.J. Lu
2018-05-28 08:15:06 -07:00
parent 03fce1c78c
commit ac98f9e227
18 changed files with 64 additions and 140 deletions
Download Patch File Download Diff File Expand all files Collapse all files

21
bfd/elf32-arc.c
View File

@ -2797,26 +2797,6 @@ const struct elf_size_info arc_elf32_size_info =
#define elf_backend_size_info arc_elf32_size_info
/* Hook called by the linker routine which adds symbols from an object
file. */
static bfd_boolean
elf_arc_add_symbol_hook (bfd * abfd,
struct bfd_link_info * info,
Elf_Internal_Sym * sym,
const char ** namep ATTRIBUTE_UNUSED,
flagword * flagsp ATTRIBUTE_UNUSED,
asection ** secp ATTRIBUTE_UNUSED,
bfd_vma * valp ATTRIBUTE_UNUSED)
{
if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
&& (abfd->flags & DYNAMIC) == 0
&& bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc;
return TRUE;
}
/* GDB expects general purpose registers to be in section .reg. However Linux
kernel doesn't create this section and instead writes registers to NOTE
section. It is up to the binutils to create a pseudo-section .reg from the
@ -2946,7 +2926,6 @@ elf32_arc_section_from_shdr (bfd *abfd,
#define elf_backend_finish_dynamic_sections elf_arc_finish_dynamic_sections
#define elf_backend_size_dynamic_sections elf_arc_size_dynamic_sections
#define elf_backend_add_symbol_hook elf_arc_add_symbol_hook
#define elf_backend_can_gc_sections 1
#define elf_backend_want_got_plt 1