[Bug binutils/17677] _bfd_elf_get_synthetic_symtab runs in O(n^2) complexity

[cvs-commit at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=17677

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https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=6a8939044781191d685e0aaeb78fe34a97ee3d55

commit 6a8939044781191d685e0aaeb78fe34a97ee3d55
Author: H.J. Lu <address@hidden>
Date:   Thu Dec 4 14:19:41 2014 -0800

    Add _bfd_elf_ifunc_get_synthetic_symtab

    In i386 and x86-64 binaries with ifunc, relocations against .got.plt
    section may not be in the same order as entries in PLT section.  This
    patch adds _bfd_elf_ifunc_get_synthetic_symtab.  It takes a function
    pointer which returns an array of PLT entry symbol values.  It calls
    the function pointer to get the PLT entry symbol value array indexed
    by relocation index, instead of calling plt_sym_val on each relocation
    index.

        PR binutils/17677
        * elf-bfd.h (_bfd_elf_ifunc_get_synthetic_symtab): New prototype.
        * elf-ifunc.c (_bfd_elf_ifunc_get_synthetic_symtab): New
        function.
        * elf32-i386.c (elf_i386_plt_sym_val): Removed.
        (elf_backend_plt_sym_val): Likewise.
        (elf_i386_get_plt_sym_val): New.
        (elf_i386_get_synthetic_symtab): Likewise.
        (bfd_elf32_get_synthetic_symtab): Likewise.
        * elf64-x86-64.c (elf_x86_64_plt_sym_val): Removed.
        (elf_x86_64_plt_sym_val_offset_plt_bnd): Likewise.
        (elf_backend_plt_sym_val): Likewise.
        (elf_x86_64_get_plt_sym_val): New.
        (bfd_elf32_get_synthetic_symtab): Likewise.
        (elf_x86_64_get_synthetic_symtab): Use
        _bfd_elf_ifunc_get_synthetic_symtab.
        (bfd_elf64_get_synthetic_symtab): Don't undefine for NaCl.

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