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Annotate JIT callback function with call frame infromation.

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This will allow us (theoretically) to unwind through JITer.
The code wasn't verified, so I'm pretty sure offsets are wrong :)

llvm-svn: 44792
This commit is contained in:
Anton Korobeynikov 2007-12-10 14:54:42 +00:00
parent 948343f861
commit 0e4780cfe2
1 changed files with 19 additions and 1 deletions
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20
lib/Target/X86/X86JITInfo.cpp
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@ -116,11 +116,18 @@ extern "C" {
".align 8\n"
".globl " ASMPREFIX "X86CompilationCallback\n"
ASMPREFIX "X86CompilationCallback:\n"
".cfi_startproc\n"
"pushl %ebp\n"
".cfi_def_cfa_offset 8\n"
".cfi_offset ebp, -8\n"
"movl %esp, %ebp\n" // Standard prologue
".cfi_def_cfa_register ebp\n"
"pushl %eax\n"
".cfi_rel_offset eax, 0\n"
"pushl %edx\n" // Save EAX/EDX/ECX
".cfi_rel_offset edx, 4\n"
"pushl %ecx\n"
".cfi_rel_offset ecx, 8\n"
#if defined(__APPLE__)
"andl $-16, %esp\n" // Align ESP on 16-byte boundary
#endif
@ -130,12 +137,23 @@ extern "C" {
"movl %ebp, (%esp)\n"
"call " ASMPREFIX "X86CompilationCallback2\n"
"movl %ebp, %esp\n" // Restore ESP
".cfi_def_cfa_register esp\n"
"subl $12, %esp\n"
".cfi_adjust_cfa_offset 12\n"
"popl %ecx\n"
".cfi_adjust_cfa_offset -4\n"
".cfi_restore ecx\n"
"popl %edx\n"
".cfi_adjust_cfa_offset -4\n"
".cfi_restore edx\n"
"popl %eax\n"
".cfi_adjust_cfa_offset -4\n"
".cfi_restore eax\n"
"popl %ebp\n"
"ret\n");
".cfi_adjust_cfa_offset -4\n"
".cfi_restore ebp\n"
"ret\n"
".cfi_endproc\n");
// Same as X86CompilationCallback but also saves XMM argument registers.
void X86CompilationCallback_SSE(void);