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include/elf

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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.
This commit is contained in:
Nick Clifton
2009-04-30 15:47:13 +00:00
parent b22a5a4185
commit d8045f234d
33 changed files with 824 additions and 70 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
gas/ChangeLog
View File

@ -1,3 +1,13 @@
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.
2009-04-24 Cary Coutant <ccoutant@google.com>
* NEWS: Add item about discriminator support.

5
gas/NEWS
View File

@ -5,6 +5,11 @@
* Add support for Sunplus score architecture.
* The .type pseudo-op now accepts a type of STT_GNU_IFUNC which can be used to
indicate that if the symbol is the target of a relocation, its value should
not be use. Instead the function should be invoked and its result used as
the value.
* Add support for Lattice Mico32 (lm32) architecture.
Changes in 2.19:

14
gas/config/obj-elf.c
View File

@ -1664,6 +1664,20 @@ obj_elf_type (int ignore ATTRIBUTE_UNUSED)
}
}
}
else if (strcmp (typename, "gnu_indirect_function") == 0
|| strcmp (typename, "10") == 0
|| strcmp (typename, "STT_GNU_IFUNC") == 0)
{
const struct elf_backend_data *bed;
bed = get_elf_backend_data (stdoutput);
if (!(bed->elf_osabi == ELFOSABI_LINUX
/* GNU/Linux is still using the default value 0. */
|| bed->elf_osabi == ELFOSABI_NONE))
as_bad (_("symbol type \"%s\" is supported only by GNU targets"),
typename);
type = BSF_FUNCTION | BSF_GNU_INDIRECT_FUNCTION;
}
#ifdef md_elf_symbol_type
else if ((type = md_elf_symbol_type (typename, sym, elfsym)) != -1)
;

4
gas/config/tc-i386.c
View File

@ -2499,6 +2499,10 @@ tc_i386_fix_adjustable (fixS *fixP ATTRIBUTE_UNUSED)
|| fixP->fx_r_type == BFD_RELOC_VTABLE_INHERIT
|| fixP->fx_r_type == BFD_RELOC_VTABLE_ENTRY)
return 0;
if (fixP->fx_addsy != NULL
&& symbol_get_bfdsym (fixP->fx_addsy)->flags & BSF_GNU_INDIRECT_FUNCTION)
return 0;
#endif
return 1;
}

5
gas/doc/as.texinfo
View File

@ -6327,6 +6327,11 @@ The types supported are:
@itemx function
Mark the symbol as being a function name.
@item STT_GNU_IFUNC
@itemx gnu_indirect_function
Mark the symbol as an indirect function when evaluated during reloc
processing. (This is only supported on Linux targeted assemblers).
@item STT_OBJECT
@itemx object
Mark the symbol as being a data object.

16
gas/testsuite/gas/elf/elf.exp
View File

@ -114,8 +114,20 @@ if { ([istarget "*-*-*elf*"]
run_elf_list_test "section5" "" "-al" "-SW" "| grep \" \\\\.test\\\[0-9\\\]\""
run_dump_test "struct"
run_dump_test "symtab"
run_dump_test "symver"
run_elf_list_test "type" "" "" "-s" "| grep \"1 \\\[FIONTC\\\]\""
run_dump_test "symver"
# The MSP port sets the ELF header's OSABI field to ELFOSABI_STANDALONE.
# The non-eabi ARM ports sets it to ELFOSABI_ARM.
# So for these targets we cannot include an IFUNC symbol type
# in the symbol type test.
if { [istarget "msp*-*-*"]
|| [istarget "arm*-*-*"]
|| [istarget "xscale*-*-*"]} then {
run_elf_list_test "type-noifunc" "" "" "-s" "| grep \"1 \\\[FONTC\\\]\""
} else {
run_elf_list_test "type" "" "" "-s" "| grep \"1 \\\[FIONTC\\\]\""
}
run_dump_test "section6"
run_dump_test "section7"
}

3
gas/testsuite/gas/elf/section2.e-armelf
View File

@ -1,5 +1,5 @@
Symbol table '.symtab' contains 6 entries:
Symbol table '.symtab' contains 7 entries:
Num: Value[ ]* Size Type Bind Vis Ndx Name
0: 0+0 0 NOTYPE LOCAL DEFAULT UND
1: 0+0 0 SECTION LOCAL DEFAULT 1
@ -7,3 +7,4 @@ Symbol table '.symtab' contains 6 entries:
3: 0+0 0 SECTION LOCAL DEFAULT 3
4: 0+0 0 SECTION LOCAL DEFAULT 4
5: 0+0 0 NOTYPE LOCAL DEFAULT 4 \$d
6: 0+0 0 SECTION LOCAL DEFAULT 5

5
gas/testsuite/gas/elf/type-noifunc.e Normal file
View File

@ -0,0 +1,5 @@
.: 0+0 1 FUNC LOCAL DEFAULT . function
.: 0+0 1 OBJECT LOCAL DEFAULT . object
.: 0+1 1 TLS LOCAL DEFAULT . tls_object
..: 0+2 1 NOTYPE LOCAL DEFAULT . notype
..: 0+1 1 (COMMON|OBJECT) GLOBAL DEFAULT COM common

20
gas/testsuite/gas/elf/type-noifunc.s Normal file
View File

@ -0,0 +1,20 @@
.text
.size function,1
.type function,%function
function:
.byte 0x0
.data
.type object,%object
.size object,1
object:
.byte 0x0
.type tls_object,%tls_object
.size tls_object,1
tls_object:
.byte 0x0
.type notype,%notype
.size notype,1
notype:
.byte 0x0
.comm common, 1
.type common,STT_COMMON

3
gas/testsuite/gas/elf/type.e
View File

@ -1,5 +1,6 @@
.: 0+0 1 FUNC LOCAL DEFAULT . function
.: 0+1 1 IFUNC LOCAL DEFAULT . indirect_function
.: 0+0 1 OBJECT LOCAL DEFAULT . object
.: 0+1 1 TLS LOCAL DEFAULT . tls_object
.: 0+2 1 NOTYPE LOCAL DEFAULT . notype
..: 0+2 1 NOTYPE LOCAL DEFAULT . notype
..: 0+1 1 (COMMON|OBJECT) GLOBAL DEFAULT COM common

4
gas/testsuite/gas/elf/type.s
View File

@ -2,6 +2,10 @@
.size function,1
.type function,%function
function:
.byte 0x0
.size indirect_function,1
.type indirect_function,%gnu_indirect_function
indirect_function:
.byte 0x0
.data
.type object,%object