[llvm-commits] [llvm] r44792 - /llvm/trunk/lib/Target/X86/X86JITInfo.cpp

[Anton Korobeynikov]

Author: asl
Date: Mon Dec 10 08:54:42 2007
New Revision: 44792

URL: http://llvm.org/viewvc/llvm-project?rev=44792&view=rev
Log:
Annotate JIT callback function with call frame infromation. 
This will allow us (theoretically) to unwind through JITer.
The code wasn't verified, so I'm pretty sure offsets are wrong :)

Modified:
    llvm/trunk/lib/Target/X86/X86JITInfo.cpp

Modified: llvm/trunk/lib/Target/X86/X86JITInfo.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86JITInfo.cpp?rev=44792&r1=44791&r2=44792&view=diff

==============================================================================
--- llvm/trunk/lib/Target/X86/X86JITInfo.cpp (original)
+++ llvm/trunk/lib/Target/X86/X86JITInfo.cpp Mon Dec 10 08:54:42 2007
@@ -116,11 +116,18 @@
     ".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 @@
     "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);