6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-06-19 18:24:00 +00:00
Code Issues Projects Releases Wiki Activity

Fix up -fstack-protector on linux to use the segment

Browse Source 
registers.  Split out testcases per architecture and os
now.

Patch from Nelson Elhage.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107640 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eric Christopher
2010-07-06 05:18:56 +00:00
parent 10d2f4d01b
commit f7a0c7bf8b
7 changed files with 107 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

17
lib/CodeGen/StackProtector.cpp
View File

@ -136,7 +136,7 @@ bool StackProtector::RequiresStackProtector() const {
bool StackProtector::InsertStackProtectors() {
BasicBlock *FailBB = 0; // The basic block to jump to if check fails.
AllocaInst *AI = 0; // Place on stack that stores the stack guard.
Constant *StackGuardVar = 0; // The stack guard variable.
Value *StackGuardVar = 0; // The stack guard variable.
for (Function::iterator I = F->begin(), E = F->end(); I != E; ) {
BasicBlock *BB = I++;
@ -155,7 +155,20 @@ bool StackProtector::InsertStackProtectors() {
//
PointerType *PtrTy = PointerType::getUnqual(
Type::getInt8Ty(RI->getContext()));
StackGuardVar = M->getOrInsertGlobal("__stack_chk_guard", PtrTy);
unsigned AddressSpace, Offset;
if (TLI->getStackCookieLocation(AddressSpace, Offset)) {
Constant *ASPtr = Constant::getNullValue(
PointerType::get(Type::getInt8Ty(RI->getContext()), AddressSpace));
APInt OffsetInt(32, Offset);
Constant *OffsetVal = Constant::getIntegerValue(
Type::getInt32Ty(RI->getContext()), OffsetInt);
StackGuardVar = ConstantExpr::getPointerCast(
ConstantExpr::getGetElementPtr(ASPtr, &OffsetVal, 1),
PointerType::get(PtrTy, AddressSpace));
} else {
StackGuardVar = M->getOrInsertGlobal("__stack_chk_guard", PtrTy);
}
BasicBlock &Entry = F->getEntryBlock();
Instruction *InsPt = &Entry.front();