[Bug target/39291] _Unwind_Backtrace fails.

["pluto at agmk dot net" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #6 from pluto at agmk dot net  2009-03-16 21:24 -------
i've tested u-dw2.exe on wine and got more info.

$ ./u-dw2.exe
err:process:start_wineboot failed to start wineboot, err 2
err:process:__wine_kernel_init boot event wait timed out
fixme:msvcrt:__lconv_init  stub
foo:enter
bar:enter
zoo:enter
boom!
signalHandler:enter
lookupSymbol: 00401887
lookupSymbol: 0040166A
signalHandler:longjmp
err:seh:raise_exception Unhandled exception code c0000096 flags 0 addr 0x409461

$ i486-pc-mingw32-objdump -hw u-dw2.exe

u-dw2.exe:     file format pei-i386

Sections:
Idx Name          Size      VMA               LMA               File off  Algn 
Flags
  0 .text         000054c4  00401000  00401000  00000400  2**4  CONTENTS,
ALLOC, LOAD, READONLY, CODE, DATA
  1 .data         00000030  00407000  00407000  00005a00  2**2  CONTENTS,
ALLOC, LOAD, DATA
  2 .rdata        00000c28  00408000  00408000  00005c00  2**2  CONTENTS,
ALLOC, LOAD, READONLY, DATA
  3 .bss          00000538  00409000  00409000  00000000  2**5  ALLOC
  4 .idata        00000558  0040a000  0040a000  00006a00  2**2  CONTENTS,
ALLOC, LOAD, DATA
  5 .CRT          00000034  0040b000  0040b000  00007000  2**2  CONTENTS,
ALLOC, LOAD, DATA
  6 .tls          00000008  0040c000  0040c000  00007200  2**2  CONTENTS,
ALLOC, LOAD, DATA

the 0xc0000096 code means 'EXCEPTION_PRIV_INSTRUCTION'
and the 0x409461 points to the .bss section.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39291