[Bug target/55909] libtool test exposes what I think is some alignment issue in libstdc++

[ebotcazou at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55909

--- Comment #24 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2013-01-09 11:51:22 UTC ---
> #1  0xfffff80100490988 in __cxxabiv1::__cxa_get_globals ()
>     at ../../../../libstdc++-v3/libsupc++/eh_globals.cc:63
> 63      { return get_global(); }
> (gdb) disassemble
> Dump of assembler code for function __cxxabiv1::__cxa_get_globals():
>    0xfffff80100490960 <+0>:     save  %sp, -176, %sp
>    0xfffff80100490964 <+4>:     sethi  %hi(0), %o0
>    0xfffff80100490968 <+8>:     sethi  %hi(0), %i0
>    0xfffff8010049096c <+12>:    sethi  %hi(0x18f400), %l7
>    0xfffff80100490970 <+16>:    call  0xfffff8010048dce0
> <__sparc_get_pc_thunk.l7>
>    0xfffff80100490974 <+20>:    add  %l7, 0x290, %l7    ! 0x18f690
>    0xfffff80100490978 <+24>:    add  %o0, 8, %o0
>    0xfffff8010049097c <+28>:    xor  %i0, 0, %i0
>    0xfffff80100490980 <+32>:    call  0xfffff8010061a558
>    0xfffff80100490984 <+36>:    add  %l7, %o0, %o0
> => 0xfffff80100490988 <+40>:    add  %o0, %i0, %i0
>    0xfffff8010049098c <+44>:    rett  %i7 + 8
>    0xfffff80100490990 <+48>:    nop 

Here's the disassembly for a working version of the compiler:

Dump of assembler code for function __cxxabiv1::__cxa_get_globals():
   0xfffff801001ea7a0 <+0>:     save  %sp, -176, %sp
   0xfffff801001ea7a4 <+4>:     sethi  %hi(0xc00), %o0
   0xfffff801001ea7a8 <+8>:     sethi  %hi(0), %i0
   0xfffff801001ea7ac <+12>:    sethi  %hi(0x129800), %l7
   0xfffff801001ea7b0 <+16>:    call  0xfffff80100182e60
<__sparc_get_pc_thunk.l7>
   0xfffff801001ea7b4 <+20>:    add  %l7, 0x50, %l7     ! 0x129850
=> 0xfffff801001ea7b8 <+24>:    add  %o0, 0x140, %o0
   0xfffff801001ea7bc <+28>:    xor  %i0, 0x10, %i0
   0xfffff801001ea7c0 <+32>:    call  0xfffff80100317c20 <__tls_get_addr@plt>
   0xfffff801001ea7c4 <+36>:    add  %l7, %o0, %o0
   0xfffff801001ea7c8 <+40>:    add  %o0, %i0, %i0
   0xfffff801001ea7cc <+44>:    rett  %i7 + 8
   0xfffff801001ea7d0 <+48>:    nop 

So it looks like the dynamic linker screwed up the PLT on your system.  I think
that you should rebuild the compiler without --enable-initfini-array.