Add support for .cfi_register now that it is easy to extent the representation
to support it. Original patch with the parsing and plumbing by the PaX team and
Roman Divacky. I added the bits in MCDwarf.cpp and the test.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168565 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/MC/MCDwarf.cpp b/lib/MC/MCDwarf.cpp
index 4a07537..92ed6cc 100644
--- a/lib/MC/MCDwarf.cpp
+++ b/lib/MC/MCDwarf.cpp
@@ -938,6 +938,19 @@
bool VerboseAsm = Streamer.isVerboseAsm();
switch (Instr.getOperation()) {
+ case MCCFIInstruction::OpRegister: {
+ unsigned Reg1 = Instr.getRegister();
+ unsigned Reg2 = Instr.getRegister2();
+ if (VerboseAsm) {
+ Streamer.AddComment("DW_CFA_register");
+ Streamer.AddComment(Twine("Reg1 ") + Twine(Reg1));
+ Streamer.AddComment(Twine("Reg2 ") + Twine(Reg2));
+ }
+ Streamer.EmitIntValue(dwarf::DW_CFA_register, 1);
+ Streamer.EmitULEB128IntValue(Reg1);
+ Streamer.EmitULEB128IntValue(Reg2);
+ return;
+ }
case MCCFIInstruction::OpUndefined: {
unsigned Reg = Instr.getRegister();
if (VerboseAsm) {