[stackprotector] Add in the stackprotector libcall.

We support this libcall on all platforms except for OpenBSD (See lib/Codegen/StackProtector.cpp). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188193 91177308-0d34-0410-b5e6-96231b3b80d8
Svengali · Aug 12, 2013 · 15b2782 · 15b2782
1 parent 2a64a63
commit 15b2782
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diff --git a/include/llvm/CodeGen/RuntimeLibcalls.h b/include/llvm/CodeGen/RuntimeLibcalls.h
@@ -354,6 +354,9 @@ namespace RTLIB {
     SYNC_FETCH_AND_NAND_4,
     SYNC_FETCH_AND_NAND_8,
 
+    // Stack Protector Fail.
+    STACKPROTECTOR_CHECK_FAIL,
+
     UNKNOWN_LIBCALL
   };
 

diff --git a/lib/CodeGen/TargetLoweringBase.cpp b/lib/CodeGen/TargetLoweringBase.cpp
@@ -361,6 +361,13 @@ static void InitLibcallNames(const char **Names, const TargetMachine &TM) {
     Names[RTLIB::SINCOS_F128] = 0;
     Names[RTLIB::SINCOS_PPCF128] = 0;
   }
+
+  if (Triple(TM.getTargetTriple()).getOS() != Triple::OpenBSD) {
+    Names[RTLIB::STACKPROTECTOR_CHECK_FAIL] = "__stack_chk_fail";
+  } else {
+    // These are generally not available.
+    Names[RTLIB::STACKPROTECTOR_CHECK_FAIL] = 0;
+  }
 }
 
 /// InitLibcallCallingConvs - Set default libcall CallingConvs.