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Implement the StartProc and EndProc Win64 EH methods on the base MCStreamer.

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Based largely on Rafael Espindola's work on CFI. Other methods soon to follow.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131623 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Charles Davis 2011-05-19 02:49:00 +00:00
parent fa89218a43
commit 0855bc5b97
2 changed files with 34 additions and 8 deletions
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5
include/llvm/MC/MCStreamer.h
View File

@ -18,6 +18,7 @@
#include "llvm/Support/DataTypes.h"
#include "llvm/MC/MCDirectives.h"
#include "llvm/MC/MCDwarf.h"
#include "llvm/MC/MCWin64EH.h"
namespace llvm {
class MCAsmInfo;
@ -57,6 +58,10 @@ namespace llvm {
MCDwarfFrameInfo *getCurrentFrameInfo();
void EnsureValidFrame();
std::vector<MCWin64EHUnwindInfo> W64UnwindInfos;
MCWin64EHUnwindInfo *getCurrentW64UnwindInfo();
void EnsureValidW64UnwindInfo();
const MCSymbol* LastNonPrivate;
/// SectionStack - This is stack of current and previous section

37
lib/MC/MCStreamer.cpp
View File

@ -310,16 +310,37 @@ void MCStreamer::EmitCFISameValue(int64_t Register) {
CurFrame->Instructions.push_back(Instruction);
}
void MCStreamer::EmitWin64EHStartProc(MCSymbol *Symbol, MCSymbol *EHandler)
{
errs() << "Not implemented yet\n";
abort();
MCWin64EHUnwindInfo *MCStreamer::getCurrentW64UnwindInfo() {
if (W64UnwindInfos.empty())
return NULL;
return &W64UnwindInfos.back();
}
void MCStreamer::EmitWin64EHEndProc()
{
errs() << "Not implemented yet\n";
abort();
void MCStreamer::EnsureValidW64UnwindInfo() {
MCWin64EHUnwindInfo *CurFrame = getCurrentW64UnwindInfo();
if (!CurFrame || CurFrame->End)
report_fatal_error("No open Win64 EH frame function!");
}
void MCStreamer::EmitWin64EHStartProc(MCSymbol *Symbol, MCSymbol *EHandler) {
MCWin64EHUnwindInfo *CurFrame = getCurrentW64UnwindInfo();
if (CurFrame && !CurFrame->End)
report_fatal_error("Starting a function before ending the previous one!");
MCWin64EHUnwindInfo Frame;
Frame.Begin = getContext().CreateTempSymbol();
Frame.Function = Symbol;
Frame.ExceptionHandler = EHandler;
EmitLabel(Frame.Begin);
W64UnwindInfos.push_back(Frame);
}
void MCStreamer::EmitWin64EHEndProc() {
EnsureValidW64UnwindInfo();
MCWin64EHUnwindInfo *CurFrame = getCurrentW64UnwindInfo();
if (CurFrame->Chained)
report_fatal_error("Not all chained regions terminated!");
CurFrame->End = getContext().CreateTempSymbol();
EmitLabel(CurFrame->End);
}
void MCStreamer::EmitWin64EHStartChained()