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+windows mingw compiled qemu-system-x86_64 crash on startup
+
+qemu-1.0-rc2/cpu-exec.c:37 longjmp(env->jmp_env, 1); it seems that env->jmp_env destroyed, (gdb) p env->jmp_env
+$3 = {0, 0, 0, 36249608, 41418280, 5303318, 41418664, 0, 0, 0, 0, 0, 0, 0, 0, 0}
+
+it's compiled on windows 2003 and using mingw gcc version 4.6.1
+
+
+On Wed, Nov 16, 2011 at 7:01 AM, humeafo <email address hidden> wrote:
+> Public bug reported:
+>
+> qemu-1.0-rc2/cpu-exec.c:37 longjmp(env->jmp_env, 1); it seems that env->jmp_env destroyed, (gdb) p env->jmp_env
+> $3 = {0, 0, 0, 36249608, 41418280, 5303318, 41418664, 0, 0, 0, 0, 0, 0, 0, 0, 0}
+
+Kevin: Is this similar to the issue you found with your mingw cross-compiler?
+
+Stefan
+
+
+Am 16.11.2011 11:35, schrieb Stefan Hajnoczi:
+> On Wed, Nov 16, 2011 at 7:01 AM, humeafo <email address hidden> wrote:
+>> Public bug reported:
+>>
+>> qemu-1.0-rc2/cpu-exec.c:37 longjmp(env->jmp_env, 1); it seems that env->jmp_env destroyed, (gdb) p env->jmp_env
+>> $3 = {0, 0, 0, 36249608, 41418280, 5303318, 41418664, 0, 0, 0, 0, 0, 0, 0, 0, 0}
+> 
+> Kevin: Is this similar to the issue you found with your mingw cross-compiler?
+
+The symptoms were different. I didn't get a broken TCG state but some
+internals of the Fiber used for coroutines must have been corrupted
+(SwitchFiber() crashed when dereferencing a null pointer, but the
+externally visible pointer that qemu passed to it was still ok).
+
+Maybe both could be symptoms of the same kind of memory corruption.
+
+Kevin
+
+
+maybe it's caused by mingw/gcc? the same binary runs well on win7-x64, but not on win2003-32 bit I'll do more test, if I've time, i'd debug it and try to find the reason
+
+after some debugging I confirmed that this is caused by a mingw gcc 4.6.1-2 optiomization bug, gcc generated optimized code that used ebp to store some results , while later ebp is used  in setjmp and longjmp, so a beiju occurred. mingw gcc 4.5.2works well.  the bug should be closed.
+
+Closing according to comment #5.
+