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Implement the stub needed to get into compilation callback. 

llvm-svn: 18147
This commit is contained in:
Chris Lattner 2004-11-23 06:27:02 +00:00
parent e1187d46a1
commit 7445c5eadc
1 changed files with 14 additions and 5 deletions
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19
llvm/lib/Target/PowerPC/PPC32JITInfo.cpp
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@ -45,7 +45,7 @@ PPC32JITInfo::getLazyResolverFunction(JITCompilerFn Fn) {
return CompilationCallback;
}
static void EmitBranchToAt(void *At, void *To) {
static void EmitBranchToAt(void *At, void *To, bool isCall) {
intptr_t Addr = (intptr_t)To;
// FIXME: should special case the short branch case.
@ -54,7 +54,7 @@ static void EmitBranchToAt(void *At, void *To) {
AtI[0] = BUILD_LIS(12, Addr >> 16); // lis r12, hi16(address)
AtI[1] = BUILD_ORI(12, 12, Addr); // ori r12, r12, low16(address)
AtI[2] = BUILD_MTCTR(12); // mtctr r12
AtI[3] = BUILD_BCTR(0); // bctr
AtI[3] = BUILD_BCTR(isCall); // bctr/bctrl
}
void *PPC32JITInfo::emitFunctionStub(void *Fn, MachineCodeEmitter &MCE) {
@ -67,11 +67,20 @@ void *PPC32JITInfo::emitFunctionStub(void *Fn, MachineCodeEmitter &MCE) {
MCE.emitWord(0);
MCE.emitWord(0);
MCE.emitWord(0);
EmitBranchToAt(Addr, Fn);
EmitBranchToAt(Addr, Fn, false);
return MCE.finishFunctionStub(0);
}
MCE.startFunctionStub(4*4);
MCE.startFunctionStub(4*7);
MCE.emitWord(0x9421ffe0); // stwu r1,-32(r1)
MCE.emitWord(0x7d6802a6); // mflr r11
MCE.emitWord(0x91610028); // stw r11, 40(r1)
void *Addr = (void*)(intptr_t)MCE.getCurrentPCValue();
MCE.emitWord(0);
MCE.emitWord(0);
MCE.emitWord(0);
MCE.emitWord(0);
EmitBranchToAt(Addr, Fn, true/*is call*/);
return MCE.finishFunctionStub(0);
}
@ -113,5 +122,5 @@ void PPC32JITInfo::relocate(void *Function, MachineRelocation *MR,
}
void PPC32JITInfo::replaceMachineCodeForFunction(void *Old, void *New) {
EmitBranchToAt(Old, New);
EmitBranchToAt(Old, New, false);
}