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[WinCOFF] Add support for the .safeseh directive

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.safeseh adds an entry to the .sxdata section to register all the
appropriate functions which may handle an exception.  This entry is not
a relocation to the symbol but instead the symbol table index of the
function.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@238641 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
David Majnemer
2015-05-30 04:56:02 +00:00
parent 3279f2381b
commit e0d2a2939d
12 changed files with 120 additions and 19 deletions
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17
lib/MC/MCParser/COFFAsmParser.cpp
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@@ -57,6 +57,7 @@ class COFFAsmParser : public MCAsmParserExtension {
addDirectiveHandler<&COFFAsmParser::ParseDirectiveEndef>(".endef");
addDirectiveHandler<&COFFAsmParser::ParseDirectiveSecRel32>(".secrel32");
addDirectiveHandler<&COFFAsmParser::ParseDirectiveSecIdx>(".secidx");
addDirectiveHandler<&COFFAsmParser::ParseDirectiveSafeSEH>(".safeseh");
addDirectiveHandler<&COFFAsmParser::ParseDirectiveLinkOnce>(".linkonce");
// Win64 EH directives.
@@ -118,6 +119,7 @@ class COFFAsmParser : public MCAsmParserExtension {
bool ParseDirectiveEndef(StringRef, SMLoc);
bool ParseDirectiveSecRel32(StringRef, SMLoc);
bool ParseDirectiveSecIdx(StringRef, SMLoc);
bool ParseDirectiveSafeSEH(StringRef, SMLoc);
bool parseCOMDATType(COFF::COMDATType &Type);
bool ParseDirectiveLinkOnce(StringRef, SMLoc);
@@ -453,6 +455,21 @@ bool COFFAsmParser::ParseDirectiveSecRel32(StringRef, SMLoc) {
return false;
}
bool COFFAsmParser::ParseDirectiveSafeSEH(StringRef, SMLoc) {
StringRef SymbolID;
if (getParser().parseIdentifier(SymbolID))
return TokError("expected identifier in directive");
if (getLexer().isNot(AsmToken::EndOfStatement))
return TokError("unexpected token in directive");
MCSymbol *Symbol = getContext().getOrCreateSymbol(SymbolID);
Lex();
getStreamer().EmitCOFFSafeSEH(Symbol);
return false;
}
bool COFFAsmParser::ParseDirectiveSecIdx(StringRef, SMLoc) {
StringRef SymbolID;
if (getParser().parseIdentifier(SymbolID))