Emit word of zeroes after the last instruction as a start of the mandatory
traceback table on PowerPC64. This helps gdb handle exceptions. The other
mandatory fields are ignored by gdb and harder to implement so just add
there a FIXME.
Patch by Bill Schmidt. PR13641.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162778 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/PowerPC/PPCAsmPrinter.cpp b/lib/Target/PowerPC/PPCAsmPrinter.cpp
index 5bd8617..de32415 100644
--- a/lib/Target/PowerPC/PPCAsmPrinter.cpp
+++ b/lib/Target/PowerPC/PPCAsmPrinter.cpp
@@ -109,6 +109,8 @@
bool doFinalization(Module &M);
virtual void EmitFunctionEntryLabel();
+
+ void EmitFunctionBodyEnd();
};
/// PPCDarwinAsmPrinter - PowerPC assembly printer, customized for Darwin/Mac
@@ -450,6 +452,19 @@
return AsmPrinter::doFinalization(M);
}
+/// EmitFunctionBodyEnd - Print the traceback table before the .size
+/// directive.
+///
+void PPCLinuxAsmPrinter::EmitFunctionBodyEnd() {
+ // Only the 64-bit target requires a traceback table. For now,
+ // we only emit the word of zeroes that GDB requires to find
+ // the end of the function.
+ // FIXME: Eventually we should add the eight-byte mandatory fields
+ // described in the PPC64 ELF ABI.
+ if (Subtarget.isPPC64())
+ OutStreamer.EmitIntValue(0, 4/*size*/);
+}
+
void PPCDarwinAsmPrinter::EmitStartOfAsmFile(Module &M) {
static const char *const CPUDirectives[] = {
"",