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mmap() seems to be failing on Sparc, so just use malloc()/free() .

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llvm-svn: 6387
This commit is contained in:
Misha Brukman 2003-05-28 18:44:38 +00:00
parent 59ea121b52
commit e1a9c59304
1 changed files with 29 additions and 4 deletions
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33
lib/ExecutionEngine/JIT/SparcEmitter.cpp
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@ -32,8 +32,16 @@ namespace {
std::pair<unsigned*,MachineInstr*> > > BBRefs;
std::map<BasicBlock*, unsigned> BBLocations;
std::vector<void*> ConstantPoolAddresses;
std::vector<void*> funcMemory;
public:
SparcEmitter(VM &vm) : TheVM(vm) {}
~SparcEmitter() {
while (! funcMemory.empty()) {
void* addr = funcMemory.back();
free(addr);
funcMemory.pop_back();
}
}
virtual void startFunction(MachineFunction &F);
virtual void finishFunction(MachineFunction &F);
@ -49,9 +57,11 @@ namespace {
int Offset);
virtual void saveBBreference(BasicBlock *BB, MachineInstr &MI);
private:
void emitAddress(void *Addr, bool isPCRelative);
void* getMemory(unsigned NumPages);
};
}
@ -66,22 +76,36 @@ MachineCodeEmitter *VM::createSparcEmitter(VM &V) {
// FIXME: This should be rewritten to support a real memory manager for
// executable memory pages!
static void *getMemory(unsigned NumPages) {
return mmap(0, 4096*NumPages, PROT_READ|PROT_WRITE|PROT_EXEC,
MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
void * SparcEmitter::getMemory(unsigned NumPages) {
#if 0
void *pa = mmap(0, 4096*NumPages, PROT_READ|PROT_WRITE|PROT_EXEC,
MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
if (pa == MAP_FAILED) {
perror("mmap");
abort();
}
#endif
void *pa = malloc(4096*NumPages);
if (!pa) {
perror("malloc");
abort();
}
funcMemory.push_back(pa);
return pa;
}
void SparcEmitter::startFunction(MachineFunction &F) {
CurBlock = (unsigned char *)getMemory(8);
std::cerr << "Starting function " << F.getFunction()->getName() << "\n";
CurByte = CurBlock; // Start writing at the beginning of the fn.
TheVM.addGlobalMapping(F.getFunction(), CurBlock);
}
void SparcEmitter::finishFunction(MachineFunction &F) {
ConstantPoolAddresses.clear();
// Re-write branches to BasicBlocks for the entire function
for (unsigned i = 0, e = BBRefs.size(); i != e; ++i) {
// Re-write branches to BasicBlocks for the entire function
unsigned Location = BBLocations[BBRefs[i].first];
unsigned *Ref = BBRefs[i].second.first;
MachineInstr *MI = BBRefs[i].second.second;
@ -149,6 +173,7 @@ void SparcEmitter::emitByte(unsigned char B) {
// BasicBlock -> pair<memloc, MachineInstr>
// when the BB is emitted, machineinstr is modified with then-currbyte,
// processed with MCE, and written out at memloc.
// Should be called by the emitter if its outputting a PCRelative disp
void SparcEmitter::saveBBreference(BasicBlock *BB, MachineInstr &MI) {
BBRefs.push_back(std::make_pair(BB, std::make_pair((unsigned*)CurByte, &MI)));
}