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From: "ktietz at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libgcj/51500] [4.7 regression] 106 unexpected libjava testsuite
 failures with mingw32
Date: Mon, 30 Jan 2012 22:21:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51500

--- Comment #15 from Kai Tietz <ktietz at gcc dot gnu.org> 2012-01-30 22:21:16 UTC ---
So this should be better then:

#define FFI_INIT_TRAMPOLINE_THISCALL(TRAMP,FUN,CTX,SIZE) \
{ unsigned char *__tramp = (unsigned char*)(TRAMP); \
   unsigned int  __fun = (unsigned int)(FUN); \
   unsigned int  __ctx = (unsigned int)(CTX); \
   unsigned int  __dis = __fun - (__ctx + 22);  \
   *(unsigned int *) &__tramp[0] = 0x8924048b; /* mov (%esp), %eax */ \
   *(unsigned int *) &__tramp[4] = 0xec83240c; /* mov %ecx, (%esp) */ \
   *(unsigned int *) &__tramp[8] = 0x24048904; /* sub $4,(%esp) */ \
                              /* mov %eax, (%esp) */ \
   *(unsigned char*) &__tramp[12] = 0xb8; \
   *(unsigned int*)  &__tramp[13] = __ctx; /* movl __ctx, %eax */ \
   *(unsigned char *)  &__tramp[17] = 0xe8; \
   *(unsigned int*)  &__tramp[18] = __dis; /* call __fun  */ \
   *(unsigned int*)  &__tramp[22] = 0x83240c8b; /* mov (%esp), %ecx */ \
   *(unsigned int*)  &__tramp[26] = 0x0c8904c4; /* add $4, %esp */ \
   *(unsigned char*) &__tramp[30] = 0x24;    /* mov %ecx, (%esp) */ \
   *(unsigned short*)  &__tramp[31] = 0xc3; /* ret  */ \
 }