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| author | Bill Wendling <isanbard@gmail.com> | 2008-11-04 02:10:20 +0000 |
|---|---|---|
| committer | Bill Wendling <isanbard@gmail.com> | 2008-11-04 02:10:20 +0000 |
| commit | 2b58ce5ab4e22e796303d68fb246d4031cb5d4ca (patch) | |
| tree | 5fad4d9047676afc1859ea48101fa0b81cbc5536 /lib/CodeGen/LLVMTargetMachine.cpp | |
| parent | 25e04788bfddc54dde7bed65302146b46089a166 (diff) | |
Initial checkin for stack protectors. Here's what it does:
* The prologue is modified to read the __stack_chk_guard global and insert it
onto the stack.
* The epilogue is modified to read the stored guard from the stack and compare
it to the original __stack_chk_guard value. If they differ, then the
__stack_chk_fail() function is called.
* The stack protector needs to be first on the stack (after the parameters) to
catch any stack-smashing activities.
Front-end support will follow after a round of beta testing.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@58673 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/LLVMTargetMachine.cpp')
| -rw-r--r-- | lib/CodeGen/LLVMTargetMachine.cpp | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/lib/CodeGen/LLVMTargetMachine.cpp b/lib/CodeGen/LLVMTargetMachine.cpp index ee3f604abd..e1dd46342d 100644 --- a/lib/CodeGen/LLVMTargetMachine.cpp +++ b/lib/CodeGen/LLVMTargetMachine.cpp @@ -60,6 +60,11 @@ static cl::opt<cl::boolOrDefault> EnableFastISelOption("fast-isel", cl::Hidden, cl::desc("Enable the experimental \"fast\" instruction selector")); +// Enable stack protectors. +static cl::opt<int> +EnableStackProtector("enable-stack-protector", cl::init(0), + cl::desc("Use ProPolice as a stack protection method.")); + FileModel::Model LLVMTargetMachine::addPassesToEmitFile(PassManagerBase &PM, raw_ostream &Out, @@ -165,6 +170,8 @@ bool LLVMTargetMachine::addCommonCodeGenPasses(PassManagerBase &PM, bool Fast) { if (!Fast) PM.add(createCodeGenPreparePass(getTargetLowering())); + PM.add(createStackProtectorPass(EnableStackProtector)); + if (PrintISelInput) PM.add(createPrintFunctionPass("\n\n" "*** Final LLVM Code input to ISel ***\n", |