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422f3d3d6d
binutils-gdb/bfd/ChangeLog
Paul Carroll 422f3d3d6d Allow the find_abstract_instance_name() function in the BFD library to also return file and line number information. 
The nm utility supports -l for using debug information to obtain file and line information for each symbol, if available.
We have a tool that consumes this information and displays it.
This identified a problem with the 'nm' utility.

When a source is compiled with -O2, functions can be inlined.  The compiler also produces an uninlined copy of the function, normally for linking to other object files.
In the case of DWARF2 debug information, the compiler generates debug information to describe a function.  If that function is inlined, the compiler then references that debug information from the inlined and uninlined copies of the routine through the use of the DW_AT_abstract_origin reference.
When nm is used on such a file, it is not able to find file and line information because that information is present in the common debug information and not at each actual implementation of the function.
The 'nm' utility only retrieves the name of the function from the abstract origin debug information and no more.

What I am proposing is to modify the find_abstract_instance_name() function (which I renamed to find_abstract_instance() ) to return the name of the function as well as any file and line information.  The routine is already parsing all of the debug information in the abstract instance, so it is easy to pick up the file and line information at that time. If, for some reason, the file and line information is not present, the routine behaves as before.

For example, if I have a simple test case:

int foo(int j)
{
        if (j < 15)
                j += j << 2;
        else
                j += j << 6;
        return j;
}

int main (int argc,char **argv)
{
        int i = argc;
        i += foo(i);
        return i;
}

If that test case is compiled with -O2 and then 'nm -l' reads that executable, it currently produces this symbol output (ignoring a lot of library symbols):

8048400 T foo
080482e0 T main /scratch/pcarroll/its254/test/mytest.c:12

If I modify 'nm' to return file and line information for abstract instances, it produces the following output:

08048400 T foo  /scratch/pcarroll/its254/test/mytest.c:1
080482e0 T main /scratch/pcarroll/its254/test/mytest.c:12
--------------------------------------------------------------------------
bfd	* bfd/dwarf2.c (find_abstract_name): Modified to return file and
	line information in addition to name, if they can be found.
2018-02-06 15:45:31 +00:00

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2018-02-06 Paul Carroll <pcarroll@codesourcery.com>
* bfd/dwarf2.c (find_abstract_name): Modified to return file and
line information in addition to name, if they can be found.
2018-02-05 Renlin Li <renlin.li@arm.com>
PR ld/22764
* elfnn-aarch64.c (elfNN_aarch64_check_relocs): Relax the
R_AARCH64_ABS32 and R_AARCH64_ABS16 for absolute symbol. Apply the
check for writeable section as well.
2018-02-05 H.J. Lu <hongjiu.lu@intel.com>
PR ld/22782
* elf32-i386.c (elf_i386_check_relocs): Set got_referenced if
_GLOBAL_OFFSET_TABLE_ is referenced or GOT is needed to resolve
undefined weak symbol to 0.
* elf64-x86-64.c (elf_x86_64_check_relocs): Set got_referenced
if _GLOBAL_OFFSET_TABLE_ is referenced.
* elfxx-x86.c (_bfd_x86_elf_size_dynamic_sections): Check
got_referenced instead of ref_regular_nonweak. Remove the
unused _GLOBAL_OFFSET_TABLE_ from symbol table.
* elfxx-x86.h (elf_x86_link_hash_table): Add got_referenced.
2018-02-05 Maciej W. Rozycki <macro@mips.com>
* elfnn-riscv.c (_bfd_riscv_relax_pc): Use `memset' to
initialize `hi_reloc'.
2018-02-05 Maciej W. Rozycki <macro@mips.com>
* elfxx-mips.c (_bfd_mips_elf_section_processing): For
SHT_MIPS_REGINFO sections don't assert the correct size and
report an error instead.
2018-02-05 Maciej W. Rozycki <macro@mips.com>
* elf.c (_bfd_elf_write_object_contents): Propagate a failure
status from `->elf_backend_section_processing'.
2018-02-02 Jim Wilson <jimw@sifive.com>
PR ld/22756
* elfnn-riscv.c (riscv_relax_delete_bytes): New parameter link_info.
If link_info->wrap_hash, check for a duplicate symbol and ignore.
(_bfd_riscv_relax_call, bfd_riscv_relax_lui, _bfd_riscv_relax_tls_le):
Pass new argument to riscv_relax_delete_bytes.
(_bfd_riscv_relax_align, _bfd_riscv_relax_delete): Likewise. Remove
ATTRIBUTE_UNUSED from link_info parameter.
2018-02-02 Alan Modra <amodra@gmail.com>
* elf64-ppc.c (ppc64_elf_relocate_section): Don't relocate nops
emitted for toc sequence optimization. Set and use "howto" later.
2018-02-01 Simon Marchi <simon.marchi@ericsson.com>
* elf64-ppc.c (ppc64_elf_archive_symbol_lookup): Avoid pointer
arithmetic on NULL pointer.
* elflink.c (_bfd_elf_archive_symbol_lookup,
elf_link_add_archive_symbols): Likewise.
2018-01-31 Michael Matz <matz@suse.de>
* elflink.c (bfd_elf_define_start_stop): Fix check of
def_dynamic.
2018-01-31 H.J. Lu <hongjiu.lu@intel.com>
PR ld/21964
* elflink.c (bfd_elf_define_start_stop): Check if __start and
__stop symbols are referenced by shared objects.
2018-01-30 Alan Modra <amodra@gmail.com>
PR 22758
* elf.c (_bfd_elf_map_sections_to_segments): Don't start a new
segment when demand paged with lma on the same page. Test this
before load/non-load, executable/non-executable,
writable/non-writable tests and simplify. Delete bogus relro
condition in writable/non-writable test. Delete outdated
comment. Formatting.
2018-01-30 Alan Modra <amodra@gmail.com>
* elflink.c (bfd_elf_define_start_stop): Make __start and __stop
symbols dynamic.
2018-01-29 Alan Modra <amodra@gmail.com>
PR 22741
* coffgen.c (coff_pointerize_aux): Ensure auxent tagndx is in
range before converting to a symbol table pointer.
2018-01-27 Nick Clifton <nickc@redhat.com>
* po/ru.po: Updated Russian translation.
2018-01-26 Alan Modra <amodra@gmail.com>
* elflink.c (bfd_elf_define_start_stop): Override symbols when
they are defined dynamically.
2018-01-26 Alan Modra <amodra@gmail.com>
* elf64-ppc.c (ppc64_elf_size_stubs): Iterate sizing when
.branch_lt changes size.
2018-01-25 Alan Modra <amodra@gmail.com>
PR 22746
* elfcode.h (elf_object_p): Avoid integer overflow.
2018-01-25 Eric Botcazou <ebotcazou@adacore.com>
PR ld/22727
* elfxx-sparc.c (_bfd_sparc_elf_check_relocs) <R_SPARC_TLS_GD_CALL>:
Do a mere lookup of the __tls_get_addr symbol instead of adding it.
Revert
2017-10-19 H.J. Lu <hongjiu.lu@intel.com>
PR ld/22263
* elfxx-sparc.c (sparc_elf_tls_transition): Replace
bfd_link_pic with !bfd_link_executable, !bfd_link_pic with
bfd_link_executable for TLS check.
(_bfd_sparc_elf_check_relocs): Likewise.
(allocate_dynrelocs): Likewise.
(_bfd_sparc_elf_relocate_section): Likewise.
2018-01-24 Renlin Li <renlin.li@arm.com>
* elfnn-aarch64.c (elfNN_aarch64_final_link_relocate): Add support for
BFD_RELOC_AARCH64_MOVW_PREL_G0, BFD_RELOC_AARCH64_MOVW_PREL_G0_NC,
BFD_RELOC_AARCH64_MOVW_PREL_G1, BFD_RELOC_AARCH64_MOVW_PREL_G1_NC,
BFD_RELOC_AARCH64_MOVW_PREL_G2, BFD_RELOC_AARCH64_MOVW_PREL_G2_NC,
BFD_RELOC_AARCH64_MOVW_PREL_G3.
* elfxx-aarch64.c (_bfd_aarch64_elf_put_addend): Likewise.
(_bfd_aarch64_elf_resolve_relocation): Likewise.
2018-01-24 Renlin Li <renlin.li@arm.com>
* reloc.c: Add BFD_RELOC_AARCH64_MOVW_PREL_G0,
BFD_RELOC_AARCH64_MOVW_PREL_G0_NC, BFD_RELOC_AARCH64_MOVW_PREL_G1,
BFD_RELOC_AARCH64_MOVW_PREL_G1_NC, BFD_RELOC_AARCH64_MOVW_PREL_G2,
BFD_RELOC_AARCH64_MOVW_PREL_G2_NC, BFD_RELOC_AARCH64_MOVW_PREL_G3.
* elfnn-aarch64.c (elfNN_aarch64_howto_table): Add entries for
BFD_RELOC_AARCH64_MOVW_PREL_G0, BFD_RELOC_AARCH64_MOVW_PREL_G0_NC,
BFD_RELOC_AARCH64_MOVW_PREL_G1, BFD_RELOC_AARCH64_MOVW_PREL_G1_NC,
BFD_RELOC_AARCH64_MOVW_PREL_G2, BFD_RELOC_AARCH64_MOVW_PREL_G2_NC,
BFD_RELOC_AARCH64_MOVW_PREL_G3.
* bfd-in2.h: Regenerate.
* libbfd.h: Regenerate.
2018-01-23 Maciej W. Rozycki <macro@mips.com>
* elfxx-mips.c (_bfd_mips_elf_final_link): Update a stale
`mips_elf32_section_processing' comment reference.
2018-01-20 H.J. Lu <hongjiu.lu@intel.com>
PR ld/22721
* elfxx-x86.c (_bfd_x86_elf_link_check_relocs): Check the
versioned __tls_get_addr symbol.
2018-01-19 Nick Clifton <nickc@redhat.com>
* po/fr.po: Updated French translation.
2018-01-18 Alan Modra <amodra@gmail.com>
* elf32-ppc.c (ppc_elf_create_glink): Correct alignment of .glink.
* elf64-ppc.c (ppc64_elf_size_stubs): Handle negative plt_stub_align.
(ppc64_elf_build_stubs): Likewise.
2018-01-17 Nick Clifton <nickc@redhat.com>
* po/ru.po: Updated Russian translation.
* po/uk/po: Updated Ukranian translation.
2018-01-17 Alan Modra <amodra@gmail.com>
* elf64-ppc.c (ppc64_elf_build_stubs): Silence gcc warning.
2018-01-17 Alan Modra <amodra@gmail.com>
* elf32-ppc.c (GLINK_ENTRY_SIZE): Handle speculation barrier.
(CRSETEQ, BEQCTRM): Define.
(is_nonpic_glink_stub): Don't check bctr.
(ppc_elf_link_hash_table_create): Init new ppc_elf_params field.
(ppc_elf_relax_section): Size speculation barrier.
(output_bctr): New function.
(write_glink_stub): Use output_bctr.
(ppc_elf_relocate_section): Use output_bctr for long branch stub.
(ppc_elf_finish_dynamic_symbol): Likewise.
(ppc_elf_finish_dynamic_sections): Use output_bctr.
* elf32-ppc.h (struct ppc_elf_params): Add speculate_indirect_jumps.
* elf64-ppc.c (CRSETEQ, BEQCTRM, BEQCTRLM): Define.
(GLINK_PLTRESOLVE_SIZE): Size speculation barrier.
(size_global_entry_stubs): Handle speculation barrier sizing.
(plt_stub_size): Likewise.
(output_bctr): New function.
(build_plt_stub, build_tls_get_addr_stub): Output speculation
barrier.
(ppc_build_one_stub): Likewise for ppc_stub_plt_branch.
(ppc_size_one_stub): Size speculation barrier in ppc_stub_plt_branch.
(build_global_entry_stubs): Output speculation barrier.
(ppc64_elf_build_stubs): Likewise in __glink_PLTresolve stub.
* elf64-ppc.h (struct ppc64_elf_params): Add speculate_indirect_jumps.
2018-01-17 Alan Modra <amodra@gmail.com>
* elf32-ppc.c (GLINK_ENTRY_SIZE): Add parameters, handle
__tls_get_addr_opt, and alignment sizing.
(TLS_GET_ADDR_GLINK_SIZE): Delete.
(is_nonpic_glink_stub): Don't use GLINK_ENTRY_SIZE.
(ppc_elf_get_synthetic_symtab): Recognize stubs spaced at 4, 6,
or 8 insns.
(ppc_elf_link_hash_table_create): Init new ppc_elf_params field.
(allocate_dynrelocs): Use new GLINK_ENTRY_SIZE.
(ppc_elf_size_dynamic_sections): Likewise. Size branch table
by PLT reloc count.
(write_glink_stub): Handle __tls_get_addr_opt stub.
Pad out to size given by GLINK_ENTRY_SIZE.
(ppc_elf_relocate_section): Adjust write_glink_stub call.
(ppc_elf_finish_dynamic_symbol): Likewise.
(ppc_elf_finish_dynamic_sections): Write PLTresolve without using
insn array since so many need rewriting.
* elf32-ppc.h (struct ppc_elf_params): Add plt_stub_align.
* elf64-ppc.c (GLINK_PLTRESOLVE_SIZE): Rename from
GLINK_CALL_STUB_SIZE. Add htab param and evaluate to size without
nops. Adjust all uses.
(ppc64_elf_get_synthetic_symtab): Don't use GLINK_CALL_STUB_SIZE
in glink_vma calculation.
(struct ppc_link_hash_table): Add global_entry section pointer.
(create_linkage_sections): Create separate section for global
entry stubs.
(PPC_LO, PPC_HI, PPC_HA): Move earlier.
(size_global_entry_stubs): Handle sizing for aligned stubs.
(ppc64_elf_size_dynamic_sections): Handle global_entry alloc,
and don't stash end of glink branch table in rawsize.
(ppc_build_one_stub): Rewrite stub size calculations.
(build_global_entry_stubs): Use new section.
(ppc64_elf_build_stubs): Don't pad __glink_PLTresolve with nops.
Build lazy link stubs out to end of section. Build global entry
stubs in new section.
2018-01-15 Nick Clifton <nickc@redhat.com>
* po/uk.po: Updated Ukranian translation.
2018-01-13 Nick Clifton <nickc@redhat.com>
* po/bfd.pot: Regenerated.
2018-01-13 Nick Clifton <nickc@redhat.com>
* version.m4: Bump version to 2.30.51
* configure: Regenerate.
2018-01-13 Nick Clifton <nickc@redhat.com>
2.30 branch created.
2018-01-12 Jens Widell <jl@opera.com>
* elf.c (setup_group): Optimize search for group by remembering
last found group and restarting search at that index.
* elf-bfd.h (struct elf_obj_tdata): Add group_search_offset field.
2018-01-12 Gunther Nikl <gnikl@users.sourceforge.net>
* aoutx.h (aout_link_check_ar_symbols): Remove default and handle
bfd_link_common_skip_none in switch.
2018-01-12 Alan Modra <amodra@gmail.com>
PR ld/22649
* elf64-ppc.c (ppc64_elf_gc_mark_dynamic_ref): Ignore dynamic
references on forced local symbols.
2018-01-12 Vlad Ivanov <vlad@ivanov.email>
* elfxx-mips.c (_bfd_mips_elf_final_link): Notify user when
.reginfo section has wrong size.
2018-01-11 H.J. Lu <hongjiu.lu@intel.com>
PR ld/22393
* elf.c (_bfd_elf_map_sections_to_segments): When generating
separate code and read-only data LOAD segments, create a new
LOAD segment if the previous section contains text and the
current section doesn't or vice versa. Don't put a writable
section in a read-only segment if there is a RELRO segment.
2018-01-11 H.J. Lu <hongjiu.lu@intel.com>
PR ld/22649
* elflink.c (bfd_elf_gc_mark_dynamic_ref_symbol): Ignore dynamic
references on forced local symbols.
2018-01-11 H.J. Lu <hongjiu.lu@intel.com>
PR ld/22677
* elflink.c (bfd_elf_gc_sections): Keep all PREINIT_ARRAY,
INIT_ARRAY as well as FINI_ARRAY sections for ld -r --gc-section.
2017-09-27 Kuan-Lin Chen <kuanlinchentw@gmail.com>
PR 22662
* elf32-nds32.c (nds32_elf_relax_loadstore): Fix a typographical error.
2018-01-03 John Baldwin <jhb@FreeBSD.org>
* elf.c (elfcore_grok_freebsd_note): Handle
NT_FREEBSD_PROCSTAT_PROC, NT_FREEBSD_PROCSTAT_FILES, and
NT_FREEBSD_PROCSTAT_VMMAP.
2018-01-03 Alan Modra <amodra@gmail.com>
Update year range in copyright notice of all files.
For older changes see ChangeLog-2017
Copyright (C) 2018 Free Software Foundation, Inc.
Copying and distribution of this file, with or without modification,
are permitted in any medium without royalty provided the copyright
notice and this notice are preserved.
Local Variables:
mode: change-log
left-margin: 8
fill-column: 74
version-control: never
End:
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