diff options
Diffstat (limited to 'lib/Target/X86/X86CodeEmitter.cpp')
| -rw-r--r-- | lib/Target/X86/X86CodeEmitter.cpp | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/lib/Target/X86/X86CodeEmitter.cpp b/lib/Target/X86/X86CodeEmitter.cpp index 5bc04424ba..eef01adfb0 100644 --- a/lib/Target/X86/X86CodeEmitter.cpp +++ b/lib/Target/X86/X86CodeEmitter.cpp @@ -102,21 +102,34 @@ unsigned JITResolver::getLazyResolver(Function *F) { return Stub; } +#ifdef _MSC_VER +#pragma optimize("y", off) +#endif + void JITResolver::CompilationCallback() { +#ifdef _MSC_VER + unsigned *StackPtr, RetAddr; + __asm mov StackPtr, ebp; + __asm mov eax, DWORD PTR [ebp + 4]; + __asm mov RetAddr, eax; +#else unsigned *StackPtr = (unsigned*)__builtin_frame_address(0); unsigned RetAddr = (unsigned)(intptr_t)__builtin_return_address(0); +#endif assert(StackPtr[1] == RetAddr && "Could not find return address on the stack!"); // It's a stub if there is an interrupt marker after the call... bool isStub = ((unsigned char*)(intptr_t)RetAddr)[0] == 0xCD; +#ifndef _MSC_VER // FIXME FIXME FIXME FIXME: __builtin_frame_address doesn't work if frame // pointer elimination has been performed. Having a variable sized alloca // disables frame pointer elimination currently, even if it's dead. This is a // gross hack. alloca(10+isStub); // FIXME FIXME FIXME FIXME +#endif // The call instruction should have pushed the return value onto the stack... RetAddr -= 4; // Backtrack to the reference itself... @@ -150,6 +163,10 @@ void JITResolver::CompilationCallback() { StackPtr[1] -= 5; } +#ifdef _MSC_VER +#pragma optimize( "", on ) +#endif + /// emitStubForFunction - This method is used by the JIT when it needs to emit /// the address of a function for a function whose code has not yet been /// generated. In order to do this, it generates a stub which jumps to the lazy |