Don't allow unaligned offsets and sizes in the Win64 EH directives.
Also, fix threshold for 'Big' register saves.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131830 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/MC/MCStreamer.cpp b/lib/MC/MCStreamer.cpp
index a760f2c..164325e 100644
--- a/lib/MC/MCStreamer.cpp
+++ b/lib/MC/MCStreamer.cpp
@@ -388,6 +388,8 @@
void MCStreamer::EmitWin64EHSetFrame(unsigned Register, unsigned Offset) {
EnsureValidW64UnwindInfo();
+ if (Offset & 0x0F)
+ report_fatal_error("Misaligned frame pointer offset!");
MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
MCWin64EHInstruction Inst(Win64EH::UOP_SetFPReg, Register, Offset);
CurFrame->LastFrameInst = CurFrame->Instructions.size();
@@ -396,6 +398,8 @@
void MCStreamer::EmitWin64EHAllocStack(unsigned Size) {
EnsureValidW64UnwindInfo();
+ if (Size & 7)
+ report_fatal_error("Misaligned stack allocation!");
MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
MCWin64EHInstruction Inst(Size);
CurFrame->Instructions.push_back(Inst);
@@ -403,18 +407,22 @@
void MCStreamer::EmitWin64EHSaveReg(unsigned Register, unsigned Offset) {
EnsureValidW64UnwindInfo();
+ if (Offset & 7)
+ report_fatal_error("Misaligned saved register offset!");
MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
MCWin64EHInstruction Inst(
- Offset > 0xFFFF ? Win64EH::UOP_SaveNonVol : Win64EH::UOP_SaveNonVolBig,
+ Offset > 512*1024-8 ? Win64EH::UOP_SaveNonVol : Win64EH::UOP_SaveNonVolBig,
Register, Offset);
CurFrame->Instructions.push_back(Inst);
}
void MCStreamer::EmitWin64EHSaveXMM(unsigned Register, unsigned Offset) {
EnsureValidW64UnwindInfo();
+ if (Offset & 0x0F)
+ report_fatal_error("Misaligned saved vector register offset!");
MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
MCWin64EHInstruction Inst(
- Offset > 0xFFFF ? Win64EH::UOP_SaveXMM128 : Win64EH::UOP_SaveXMM128Big,
+ Offset > 512*1024-16 ? Win64EH::UOP_SaveXMM128 : Win64EH::UOP_SaveXMM128Big,
Register, Offset);
CurFrame->Instructions.push_back(Inst);
}