From 126bd602886f361864061381d97bf23a33e26854 Mon Sep 17 00:00:00 2001
From: Evan Cheng <evan.cheng@apple.com>
Date: Tue, 2 Sep 2008 07:49:03 +0000
Subject: [PATCH] Add Mac OS X compatible JIT callback routine.

llvm-svn: 55625
---
 lib/Target/ARM/ARMJITInfo.cpp | 34 +++++++++++++++++++++++++++++-----
 1 file changed, 29 insertions(+), 5 deletions(-)

diff --git a/lib/Target/ARM/ARMJITInfo.cpp b/lib/Target/ARM/ARMJITInfo.cpp
index bc2bba36c80..1c23054c82b 100644
--- a/lib/Target/ARM/ARMJITInfo.cpp
+++ b/lib/Target/ARM/ARMJITInfo.cpp
@@ -29,6 +29,14 @@ void ARMJITInfo::replaceMachineCodeForFunction(void *Old, void *New) {
 /// compile a function lazily.
 static TargetJITInfo::JITCompilerFn JITCompilerFunction;
 
+// Get the ASMPREFIX for the current host.  This is often '_'.
+#ifndef __USER_LABEL_PREFIX__
+#define __USER_LABEL_PREFIX__
+#endif
+#define GETASMPREFIX2(X) #X
+#define GETASMPREFIX(X) GETASMPREFIX2(X)
+#define ASMPREFIX GETASMPREFIX(__USER_LABEL_PREFIX__)
+
 // CompilationCallback stub - We can't use a C function with inline assembly in
 // it, because we the prolog/epilog inserted by GCC won't work for us.  Instead,
 // write our own wrapper, which does things our way, so we have complete control
@@ -39,21 +47,37 @@ extern "C" {
   asm(
     ".text\n"
     ".align 2\n"
-    ".globl ARMCompilationCallback\n"
-    "ARMCompilationCallback:\n"
+    ".globl " ASMPREFIX "ARMCompilationCallback\n"
+    ASMPREFIX "ARMCompilationCallback:\n"
     // save main registers
+#if defined(__APPLE__)
+    "stmfd  sp!, {r4, r5, r6, r7, lr}\n"
+    "mov    r0, r7\n"  // stub's frame
+    "stmfd  sp!, {r8, r10, r11}\n"
+#else
     "mov    ip, sp\n"
     "stmfd  sp!, {fp, ip, lr, pc}\n"
     "sub    fp, ip, #4\n"
+#endif // __APPLE__
     // arguments to Compilation Callback
     // r0 - our lr (address of the call instruction in stub plus 4)
     // r1 - stub's lr (address of instruction that called the stub plus 4)
+#if defined(__APPLE__)
+    "mov    r0, r7\n"  // stub's frame
+#else
     "mov    r0, fp\n"  // stub's frame
+#endif // __APPLE__
     "mov    r1, lr\n"  // stub's lr
-    "bl     ARMCompilationCallbackC\n"
+    "bl     " ASMPREFIX "ARMCompilationCallbackC\n"
     // restore main registers
-    "ldmfd  sp, {fp, sp, pc}\n");
-#else // Not an ARM host
+#if defined(__APPLE__)
+    "ldmfd  sp!, {r8, r10, r11}\n"
+    "ldmfd  sp!, {r4, r5, r6, r7, pc}\n"
+#else
+    "ldmfd  sp, {fp, sp, pc}\n"
+#endif // __APPLE__
+      );
+#else  // Not an ARM host
   void ARMCompilationCallback() {
     assert(0 && "Cannot call ARMCompilationCallback() on a non-ARM arch!\n");
     abort();