include/elf

2009-04-30  Nick Clifton  <nickc@redhat.com>

        * common.h (STT_GNU_IFUNC): Define.

elfcpp
2009-04-30  Nick Clifton  <nickc@redhat.com>

        * (enum STT): Add STT_GNU_IFUNC.

gas
2009-04-30  Nick Clifton  <nickc@redhat.com>

        * 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  <nickc@redhat.com>

        * 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  <nickc@redhat.com>

        * 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  <nickc@redhat.com>

        * 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  <nickc@redhat.com>

        * NEWS: Mention support for IFUNC symbols.

ld/testsuite
2009-04-30  Nick Clifton  <nickc@redhat.com>

        * 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.

1 files changed, 12 insertions, 2 deletions

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);
 }