[Bug ld/6893] New: Partial linking results in corrupt .eh_frame_hdr

[jan dot kratochvil at redhat dot com]

Linking C++ applications may produce:

/usr/bin/ld: error in
/home/aph/llvm/Release/lib/LLVMInterpreter.o(.eh_frame); no .eh_frame_hdr table
will be created.

These relocations
Relocation section '.rela.eh_frame' at offset 0x14b0 contains 2 entries:
  Offset          Info           Type           Sym. Value    Sym. Name +
Addend
000000000020  000600000002 R_X86_64_PC32     0000000000000000
.text._ZNK4llvm13Targe + 0

with its target section .text._ZNK4llvm13 which is SHT_GROUP
  [ 9] .text._ZNK4llvm13 PROGBITS         0000000000000000  000004c0
       000000000000004f  0000000000000000 AXG       0     0     16

get converted to:
000000000020  000000000000 R_X86_64_NONE                       0000000000000000

by this code:
../bfd/elf64-x86-64.c
      if (sec != NULL && elf_discarded_section (sec))
        {
          /* For relocs against symbols from removed linkonce sections,
             or sections discarded by a linker script, we just want the
             section contents zeroed.  Avoid any special processing.  */
          _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
          rel->r_info = 0;
          rel->r_addend = 0;
          continue;
        }

-- 
           Summary: Partial linking results in corrupt .eh_frame_hdr
           Product: binutils
           Version: 2.20 (HEAD)
            Status: NEW
          Severity: normal
          Priority: P2
         Component: ld
        AssignedTo: unassigned at sources dot redhat dot com
        ReportedBy: jan dot kratochvil at redhat dot com
                CC: bug-binutils at gnu dot org
 GCC build triplet: x86_64-unknown-linux-gnu
  GCC host triplet: x86_64-unknown-linux-gnu
GCC target triplet: x86_64-unknown-linux-gnu


http://sourceware.org/bugzilla/show_bug.cgi?id=6893

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