[Bug ld/20830] .plt.got section is lacking unwind info

[cvs-commit at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=20830

--- Comment #11 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot 
gnu.org> ---
The binutils-2_28-branch branch has been updated by H.J. Lu
<address@hidden>:

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=326e3a04a5fa4fbf85b4cc4188a355d2715e5d17

commit 326e3a04a5fa4fbf85b4cc4188a355d2715e5d17
Author: H.J. Lu <address@hidden>
Date:   Tue Jan 10 13:31:59 2017 -0800

    i386/x86-64: Add unwind info for .plt.got section

    When there are both PLT and GOT references to the same function symbol,
    linker combines GOTPLT and GOT slots into a single GOT slot and create
    an entry in .plt.got section for PLT access via the GOT slot.  This
    patch adds unwind info for .plt.got section and places .plt.got section
    after .plt section for x32.  .eh_frame section covering PLT sections
    should be aligned to 4 bytes for i386 and x32.

    bfd/

    2017-01-13  H.J. Lu  <address@hidden>

        Backport from master
        2017-01-10  H.J. Lu  <address@hidden>

        * elf32-i386.c (elf_i386_check_relocs): Align .eh_frame section
        to 4 bytes.
        * elf64-x86-64.c (elf_x86_64_create_dynamic_sections): Align
        .eh_frame section to 4 bytes for x32.
        (elf_x86_64_check_relocs): Likewise.

        2017-01-10  H.J. Lu  <address@hidden>

        PR ld/20830
        * elf32-i386.c (elf_i386_eh_frame_plt_got): New.
        (PLT_GOT_FDE_LENGTH): Likewise.
        (elf_i386_plt_layout): Add eh_frame_plt_got and
        eh_frame_plt_got_size.
        (elf_i386_plt): Updated.
        (elf_i386_link_hash_table): Add plt_got_eh_frame.
        (elf_i386_check_relocs): Create .eh_frame section for .plt.got.
        (elf_i386_size_dynamic_sections): Allocate and initialize
        .eh_frame section for .plt.got.
        (elf_i386_finish_dynamic_sections): Adjust .eh_frame section for
        .plt.got.
        (elf_i386_nacl_plt): Add FIXME for eh_frame_plt_got and
        eh_frame_plt_got_size.
        * elf64-x86-64.c (elf_x86_64_eh_frame_plt_got): New.
        (PLT_GOT_FDE_LENGTH): Likewise.
        (elf_x86_64_backend_data): Add eh_frame_plt_got and
        eh_frame_plt_got_size.
        (elf_x86_64_arch_bed): Updated.
        (elf_x86_64_bnd_arch_bed): Add FIXME for eh_frame_plt_got and
        eh_frame_plt_got_size.
        (elf_x86_64_nacl_arch_bed): Likewise.
        (elf_x86_64_link_hash_table): Add plt_got_eh_frame.
        (elf_x86_64_check_relocs): Create .eh_frame section for .plt.got.
        (elf_x86_64_size_dynamic_sections): Allocate and initialize
        .eh_frame section for .plt.got.
        (elf_x86_64_finish_dynamic_sections): Adjust .eh_frame section
        for .plt.got.

    ld/

    2017-01-13  H.J. Lu  <address@hidden>

        Backport from master
        2017-01-10  H.J. Lu  <address@hidden>

        * testsuite/ld-x86-64/pr20830b.d: Updated.

        2017-01-10  H.J. Lu  <address@hidden>

        * emulparams/elf32_x86_64.sh (TINY_READONLY_SECTION): New.
        * testsuite/ld-x86-64/pr20830.d: Renamed to ...
        * testsuite/ld-x86-64/pr20830a.d: This.  Updated.
        * testsuite/ld-x86-64/pr20830b.d: New file.
        * testsuite/ld-x86-64/x86-64.exp: Rename pr20830 to pr20830a.
        Run pr20830b.

        2017-01-10  H.J. Lu  <address@hidden>

        PR ld/20830
        * testsuite/ld-i386/i386.exp: Run pr20830.
        * testsuite/ld-x86-64/x86-64.exp: Likewise.
        * testsuite/ld-i386/pr20830.d: New file.
        * testsuite/ld-i386/pr20830.s: Likewise.
        * testsuite/ld-x86-64/pr20830.d: Likewise.
        * testsuite/ld-x86-64/pr20830.s: Likewise.

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