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Parsing and plumbing for .cfi_sections.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131117 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola 2011-05-10 01:10:18 +00:00
parent 65a2f77b0e
commit f9efd83166
3 changed files with 47 additions and 1 deletions
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4
include/llvm/MC/MCStreamer.h
View File

@ -50,6 +50,9 @@ namespace llvm {
MCStreamer(const MCStreamer&); // DO NOT IMPLEMENT
MCStreamer &operator=(const MCStreamer&); // DO NOT IMPLEMENT
bool EmitEHFrame;
bool EmitDebugFrame;
std::vector<MCDwarfFrameInfo> FrameInfos;
MCDwarfFrameInfo *getCurrentFrameInfo();
void EnsureValidFrame();
@ -436,6 +439,7 @@ namespace llvm {
void EmitDwarfSetLineAddr(int64_t LineDelta, const MCSymbol *Label,
int PointerSize);
virtual void EmitCFISections(bool EH, bool Debug);
virtual void EmitCFIStartProc();
virtual void EmitCFIEndProc();
virtual void EmitCFIDefCfa(int64_t Register, int64_t Offset);

36
lib/MC/MCParser/AsmParser.cpp
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@ -243,6 +243,8 @@ public:
AddDirectiveHandler<&GenericAsmParser::ParseDirectiveStabs>(".stabs");
// CFI directives.
AddDirectiveHandler<&GenericAsmParser::ParseDirectiveCFISections>(
".cfi_sections");
AddDirectiveHandler<&GenericAsmParser::ParseDirectiveCFIStartProc>(
".cfi_startproc");
AddDirectiveHandler<&GenericAsmParser::ParseDirectiveCFIEndProc>(
@ -289,6 +291,7 @@ public:
bool ParseDirectiveLine(StringRef, SMLoc DirectiveLoc);
bool ParseDirectiveLoc(StringRef, SMLoc DirectiveLoc);
bool ParseDirectiveStabs(StringRef, SMLoc DirectiveLoc);
bool ParseDirectiveCFISections(StringRef, SMLoc DirectiveLoc);
bool ParseDirectiveCFIStartProc(StringRef, SMLoc DirectiveLoc);
bool ParseDirectiveCFIEndProc(StringRef, SMLoc DirectiveLoc);
bool ParseDirectiveCFIDefCfa(StringRef, SMLoc DirectiveLoc);
@ -2265,6 +2268,39 @@ bool GenericAsmParser::ParseDirectiveStabs(StringRef Directive,
return TokError("unsupported directive '" + Directive + "'");
}
/// ParseDirectiveCFISections
/// ::= .cfi_sections section [, section]
bool GenericAsmParser::ParseDirectiveCFISections(StringRef,
SMLoc DirectiveLoc) {
StringRef Name;
bool EH = false;
bool Debug = false;
if (getParser().ParseIdentifier(Name))
return TokError("Expected an identifier");
if (Name == ".eh_frame")
EH = true;
else if (Name == ".debug_frame")
Debug = true;
if (getLexer().is(AsmToken::Comma)) {
Lex();
if (getParser().ParseIdentifier(Name))
return TokError("Expected an identifier");
if (Name == ".eh_frame")
EH = true;
else if (Name == ".debug_frame")
Debug = true;
}
getStreamer().EmitCFISections(EH, Debug);
return false;
}
/// ParseDirectiveCFIStartProc
/// ::= .cfi_startproc
bool GenericAsmParser::ParseDirectiveCFIStartProc(StringRef,

8
lib/MC/MCStreamer.cpp
View File

@ -20,7 +20,8 @@
#include <cstdlib>
using namespace llvm;
MCStreamer::MCStreamer(MCContext &Ctx) : Context(Ctx) {
MCStreamer::MCStreamer(MCContext &Ctx) : Context(Ctx), EmitEHFrame(true),
EmitDebugFrame(false) {
const MCSection *section = NULL;
SectionStack.push_back(std::make_pair(section, section));
}
@ -176,6 +177,11 @@ void MCStreamer::EmitLabel(MCSymbol *Symbol) {
LastNonPrivate = Symbol;
}
void MCStreamer::EmitCFISections(bool EH, bool Debug) {
EmitEHFrame = EH;
EmitDebugFrame = Debug;
}
void MCStreamer::EmitCFIStartProc() {
MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
if (CurFrame && !CurFrame->End)