maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity

* Correctly emit a far call if the target address does not fit into 30 bits 

instead of assert()ing
* Fixed a nasty bug where '07' was used instead of register 'o7'

llvm-svn: 7382
This commit is contained in:
Misha Brukman 2003-07-29 19:00:58 +00:00
parent e47f069855
commit 0db560d8f6
1 changed files with 15 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

32
llvm/lib/Target/Sparc/SparcV9CodeEmitter.cpp
View File

@ -286,22 +286,20 @@ uint64_t JITResolver::emitStubForFunction(Function *F) {
int64_t CurrPC = MCE.getCurrentPCValue();
int64_t Addr = (int64_t)addFunctionReference(CurrPC, F);
int64_t CallTarget = (Addr-CurrPC) >> 2;
if (CallTarget >= (1 << 30) || CallTarget <= -(1 << 30)) {
std::cerr << "Call target beyond 30 bit limit of CALL: "
<< CallTarget << "\n";
abort();
}
// call CallTarget ;; invoke the callback
MachineInstr *Call = BuildMI(V9::CALL, 1).addSImm(CallTarget);
SparcV9.emitWord(SparcV9.getBinaryCodeForInstr(*Call));
delete Call;
SparcV9.emitFarCall(Addr);
} else {
// call CallTarget ;; invoke the callback
MachineInstr *Call = BuildMI(V9::CALL, 1).addSImm(CallTarget);
SparcV9.emitWord(SparcV9.getBinaryCodeForInstr(*Call));
delete Call;
// nop ;; call delay slot
MachineInstr *Nop = BuildMI(V9::NOP, 0);
SparcV9.emitWord(SparcV9.getBinaryCodeForInstr(*Nop));
delete Nop;
// nop ;; call delay slot
MachineInstr *Nop = BuildMI(V9::NOP, 0);
SparcV9.emitWord(SparcV9.getBinaryCodeForInstr(*Nop));
delete Nop;
}
SparcV9.emitWord(0xDEADBEEF); // marker so that we know it's really a stub
return (intptr_t)MCE.finishFunctionStub(*F);
@ -394,8 +392,8 @@ SparcV9CodeEmitter::getRealRegNum(unsigned fakeReg,
// being accounted for, and the behavior will be incorrect!!
inline void SparcV9CodeEmitter::emitFarCall(uint64_t Target) {
static const unsigned i1 = SparcIntRegClass::i1, i2 = SparcIntRegClass::i2,
i7 = SparcIntRegClass::i7,
o6 = SparcIntRegClass::o6, g0 = SparcIntRegClass::g0;
i7 = SparcIntRegClass::i7, o6 = SparcIntRegClass::o6,
o7 = SparcIntRegClass::o7, g0 = SparcIntRegClass::g0;
//
// Save %i1, %i2 to the stack so we can form a 64-bit constant in %i2
@ -451,8 +449,8 @@ inline void SparcV9CodeEmitter::emitFarCall(uint64_t Target) {
emitWord(getBinaryCodeForInstr(*LDX));
delete LDX;
// jmpl %i2, %g0, %07 ;; indirect call on %i2
MachineInstr *J = BuildMI(V9::JMPLRETr, 3).addReg(i2).addReg(g0).addReg(07);
// jmpl %i2, %g0, %o7 ;; indirect call on %i2
MachineInstr *J = BuildMI(V9::JMPLRETr, 3).addReg(i2).addReg(g0).addReg(o7);
emitWord(getBinaryCodeForInstr(*J));
delete J;