From d8045f234d8865a7a7bfce71e81fcbeaf4098a7e Mon Sep 17 00:00:00 2001 From: Nick Clifton Date: Thu, 30 Apr 2009 15:47:13 +0000 Subject: include/elf 2009-04-30 Nick Clifton * common.h (STT_GNU_IFUNC): Define. elfcpp 2009-04-30 Nick Clifton * (enum STT): Add STT_GNU_IFUNC. gas 2009-04-30 Nick Clifton * config/obj-elf.c (obj_elf_type): Add support for a gnu_indirect_function type. * config/tc-i386.c (tc_i386_fix_adjustable): Do not adjust fixups against indirect function symbols. * doc/as.texinfo (.type): Document the support for the gnu_indirect_function symbol type. * NEWS: Mention the new feature. gas/testsuite 2009-04-30 Nick Clifton * gas/elf/elf.exp: Extend type test to include an ifunc symbol. Provide an alternative test for targets which do not support ifunc symbols. (type.s): Add entry for an ifunc symbol. (type.e): Add ifunc entry to expected symbol dump. (section2.e-armelf): Add entry for ifunc symbol. (type-noifunc.s): New file. (type-noifunc.e): New file. bfd/ 2009-04-30 Nick Clifton * elf-bfd.h (struct bfd_elf_section_data): Add indirect_relocs section pointer. (struct elf_obj_data): Add has_ifunc_symbols boolean. * elf.c (swap_out_syms): Convert BSF_GNU_INDIRECT_FUNCTION flags into a STT_GNU_IFUNC symbol type. (_bfd_elf_is_function_type): Accept STT_GNU_IFUNC as a function type. (_bfd_elf_set_osabi): Set the osasbi field to ELFOSABI_LINUX if the binary contains ifunc symbols. * elfcode.h (elf_slurp_symbol_table): Translate the STT_GNU_IFUNC symbol type into a BSF_GNU_INDIRECT_FUNCTION flag. * elf32-i386.c (is_indirect_function): New function. (elf_i386_check_relocs): Create an ifunc output section. (allocate_dynrelocs): Create dynamic relocs in the ifunc output section if necessary. (elf_i386_relocate_section): Emit a reloc against an ifunc symbol if necessary. (elf_i386_add_symbol_hook): New function. Set the has_ifunc_symbols field of the elf_obj_data structure if an ifunc symbol is encountered. (elf_backend_post_process_headers): Define. (elf_backend_add_symbol_hook): Define. (elf_i386_post_process_headers): Rename to elf_i388_fbsd_post_process_headers. * elf64-x86_64.c (IS_X86_64_PCREL_TYPE): New macro. (is_indirect_function): New function. (elf64_x86_64_check_relocs): Create an ifunc output section. (allocate_dynrelocs): Create dynamic relocs in the ifunc output section if necessary. (elf64_x86_64_relocate_section): Emit a reloc against an ifunc symbol if necessary. (elf_i386_add_symbol_hook): Set the has_ifunc_symbols field of the elf_obj_data structure if an ifunc symbol is encountered. (elf_backend_post_process_headers): Define. * elflink.c (_bfd_elf_adjust_dynamic_symbol): Always create a PLT if we have ifunc symbols to handle. (get_ifunc_reloc_section_name): New function. Computes the name for an ifunc section. (_bfd_elf_make_ifunc_reloc_section): New function. Creates a section to hold ifunc relocs. * syms.c (BSF_GNU_INDIRECT_FUNCTION): Define. (bfd_print_symbol_vandf): Handle ifunc symbols. (bfd_decode_symclass): Likewise. * bfd-in2.h: Regenerate. binutils 2009-04-30 Nick Clifton * readelf.c (dump_relocations): Display a relocation against an ifunc symbol as if it were a function invocation. (get_symbol_type): Handle STT_GNU_IFUNC. ld 2009-04-30 Nick Clifton * NEWS: Mention support for IFUNC symbols. ld/testsuite 2009-04-30 Nick Clifton * ld-ifunc: New directory. * ld-ifunc/ifunc.exp: New file: Run the IFUNC tests. * ld-ifunc/prog.c: New file. * ld-ifunc/lib.c: New file. --- bfd/elf.c | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) (limited to 'bfd/elf.c') diff --git a/bfd/elf.c b/bfd/elf.c index 720c8a1..c7151be 100644 --- a/bfd/elf.c +++ b/bfd/elf.c @@ -6399,6 +6399,8 @@ Unable to find equivalent output section for symbol '%s' from section '%s'"), if ((flags & BSF_THREAD_LOCAL) != 0) type = STT_TLS; + else if ((flags & BSF_GNU_INDIRECT_FUNCTION) != 0) + type = STT_GNU_IFUNC; else if ((flags & BSF_FUNCTION) != 0) type = STT_FUNC; else if ((flags & BSF_OBJECT) != 0) @@ -8977,15 +8979,23 @@ _bfd_elf_set_osabi (bfd * abfd, i_ehdrp = elf_elfheader (abfd); i_ehdrp->e_ident[EI_OSABI] = get_elf_backend_data (abfd)->elf_osabi; + + /* To make things simpler for the loader on Linux systems we set the + osabi field to ELFOSABI_LINUX if the binary contains symbols of + the STT_GNU_IFUNC type. */ + if (i_ehdrp->e_ident[EI_OSABI] == ELFOSABI_NONE + && elf_tdata (abfd)->has_ifunc_symbols) + i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_LINUX; } /* Return TRUE for ELF symbol types that represent functions. This is the default version of this function, which is sufficient for - most targets. It returns true if TYPE is STT_FUNC. */ + most targets. It returns true if TYPE is STT_FUNC or STT_GNU_IFUNC. */ bfd_boolean _bfd_elf_is_function_type (unsigned int type) { - return (type == STT_FUNC); + return (type == STT_FUNC + || type == STT_GNU_IFUNC); } -- cgit v1.1