From 51cc3c13eac78da242f0518fc42580e48dd5304f Mon Sep 17 00:00:00 2001
From: Nicolas Geoffray <nicolas.geoffray@lip6.fr>
Date: Wed, 16 Apr 2008 20:46:05 +0000
Subject: Correlate stubs with functions in JIT: when emitting a stub, the JIT
 tells the memory manager which function the stub will resolve.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49814 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/X86/X86JITInfo.cpp | 29 ++++++++++++++++-------------
 1 file changed, 16 insertions(+), 13 deletions(-)

(limited to 'lib/Target/X86/X86JITInfo.cpp')

diff --git a/lib/Target/X86/X86JITInfo.cpp b/lib/Target/X86/X86JITInfo.cpp
index 5d942a1768..7f72bd473e 100644
--- a/lib/Target/X86/X86JITInfo.cpp
+++ b/lib/Target/X86/X86JITInfo.cpp
@@ -15,6 +15,7 @@
 #include "X86JITInfo.h"
 #include "X86Relocations.h"
 #include "X86Subtarget.h"
+#include "llvm/Function.h"
 #include "llvm/CodeGen/MachineCodeEmitter.h"
 #include "llvm/Config/alloca.h"
 #include <cstdlib>
@@ -391,19 +392,21 @@ X86JITInfo::getLazyResolverFunction(JITCompilerFn F) {
   return X86CompilationCallback;
 }
 
-void *X86JITInfo::emitGlobalValueLazyPtr(void *GV, MachineCodeEmitter &MCE) {
+void *X86JITInfo::emitGlobalValueLazyPtr(const GlobalValue* GV, void *ptr,
+                                         MachineCodeEmitter &MCE) {
 #if defined (X86_64_JIT)
   MCE.startFunctionStub(8, 8);
-  MCE.emitWordLE(((unsigned *)&GV)[0]);
-  MCE.emitWordLE(((unsigned *)&GV)[1]);
+  MCE.emitWordLE(((unsigned *)&ptr)[0]);
+  MCE.emitWordLE(((unsigned *)&ptr)[1]);
 #else
-  MCE.startFunctionStub(4, 4);
-  MCE.emitWordLE((intptr_t)GV);
+  MCE.startFunctionStub(GV, 4, 4);
+  MCE.emitWordLE((intptr_t)ptr);
 #endif
-  return MCE.finishFunctionStub(0);
+  return MCE.finishFunctionStub(GV);
 }
 
-void *X86JITInfo::emitFunctionStub(void *Fn, MachineCodeEmitter &MCE) {
+void *X86JITInfo::emitFunctionStub(const Function* F, void *Fn,
+                                   MachineCodeEmitter &MCE) {
   // Note, we cast to intptr_t here to silence a -pedantic warning that 
   // complains about casting a function pointer to a normal pointer.
 #if defined (X86_32_JIT) && !defined (_MSC_VER)
@@ -414,7 +417,7 @@ void *X86JITInfo::emitFunctionStub(void *Fn, MachineCodeEmitter &MCE) {
 #endif
   if (NotCC) {
 #if defined (X86_64_JIT)
-    MCE.startFunctionStub(13, 4);
+    MCE.startFunctionStub(F, 13, 4);
     MCE.emitByte(0x49);          // REX prefix
     MCE.emitByte(0xB8+2);        // movabsq r10
     MCE.emitWordLE(((unsigned *)&Fn)[0]);
@@ -423,15 +426,15 @@ void *X86JITInfo::emitFunctionStub(void *Fn, MachineCodeEmitter &MCE) {
     MCE.emitByte(0xFF);          // jmpq *r10
     MCE.emitByte(2 | (4 << 3) | (3 << 6));
 #else
-    MCE.startFunctionStub(5, 4);
+    MCE.startFunctionStub(F, 5, 4);
     MCE.emitByte(0xE9);
     MCE.emitWordLE((intptr_t)Fn-MCE.getCurrentPCValue()-4);
 #endif
-    return MCE.finishFunctionStub(0);
+    return MCE.finishFunctionStub(F);
   }
 
 #if defined (X86_64_JIT)
-  MCE.startFunctionStub(14, 4);
+  MCE.startFunctionStub(F, 14, 4);
   MCE.emitByte(0x49);          // REX prefix
   MCE.emitByte(0xB8+2);        // movabsq r10
   MCE.emitWordLE(((unsigned *)&Fn)[0]);
@@ -440,14 +443,14 @@ void *X86JITInfo::emitFunctionStub(void *Fn, MachineCodeEmitter &MCE) {
   MCE.emitByte(0xFF);          // callq *r10
   MCE.emitByte(2 | (2 << 3) | (3 << 6));
 #else
-  MCE.startFunctionStub(6, 4);
+  MCE.startFunctionStub(F, 6, 4);
   MCE.emitByte(0xE8);   // Call with 32 bit pc-rel destination...
 
   MCE.emitWordLE((intptr_t)Fn-MCE.getCurrentPCValue()-4);
 #endif
 
   MCE.emitByte(0xCD);   // Interrupt - Just a marker identifying the stub!
-  return MCE.finishFunctionStub(0);
+  return MCE.finishFunctionStub(F);
 }
 
 /// getPICJumpTableEntry - Returns the value of the jumptable entry for the
-- 
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