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Parse and ignore some .cfi_* directives.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@119362 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola 2010-11-16 18:34:07 +00:00
parent fae76d0734
commit 1fdfbc47d8
1 changed files with 95 additions and 0 deletions
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95
lib/MC/MCParser/AsmParser.cpp
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@ -238,6 +238,22 @@ public:
AddDirectiveHandler<&GenericAsmParser::ParseDirectiveLoc>(".loc");
AddDirectiveHandler<&GenericAsmParser::ParseDirectiveStabs>(".stabs");
// CFI directives.
AddDirectiveHandler<&GenericAsmParser::ParseDirectiveCFIStartProc>(
".cfi_startproc");
AddDirectiveHandler<&GenericAsmParser::ParseDirectiveCFIEndProc>(
".cfi_endproc");
AddDirectiveHandler<&GenericAsmParser::ParseDirectiveCFIDefCfaOffset>(
".cfi_def_cfa_offset");
AddDirectiveHandler<&GenericAsmParser::ParseDirectiveCFIDefCfaRegister>(
".cfi_def_cfa_register");
AddDirectiveHandler<&GenericAsmParser::ParseDirectiveCFIOffset>(
".cfi_offset");
AddDirectiveHandler<
&GenericAsmParser::ParseDirectiveCFIPersonalityOrLsda>(".cfi_personality");
AddDirectiveHandler<
&GenericAsmParser::ParseDirectiveCFIPersonalityOrLsda>(".cfi_lsda");
// Macro directives.
AddDirectiveHandler<&GenericAsmParser::ParseDirectiveMacrosOnOff>(
".macros_on");
@ -255,6 +271,12 @@ public:
bool ParseDirectiveLine(StringRef, SMLoc DirectiveLoc);
bool ParseDirectiveLoc(StringRef, SMLoc DirectiveLoc);
bool ParseDirectiveStabs(StringRef, SMLoc DirectiveLoc);
bool ParseDirectiveCFIStartProc(StringRef, SMLoc DirectiveLoc);
bool ParseDirectiveCFIEndProc(StringRef, SMLoc DirectiveLoc);
bool ParseDirectiveCFIDefCfaOffset(StringRef, SMLoc DirectiveLoc);
bool ParseDirectiveCFIDefCfaRegister(StringRef, SMLoc DirectiveLoc);
bool ParseDirectiveCFIOffset(StringRef, SMLoc DirectiveLoc);
bool ParseDirectiveCFIPersonalityOrLsda(StringRef, SMLoc DirectiveLoc);
bool ParseDirectiveMacrosOnOff(StringRef, SMLoc DirectiveLoc);
bool ParseDirectiveMacro(StringRef, SMLoc DirectiveLoc);
@ -2116,6 +2138,79 @@ bool GenericAsmParser::ParseDirectiveStabs(StringRef Directive,
return TokError("unsupported directive '" + Directive + "'");
}
/// ParseDirectiveCFIStartProc
/// ::= .cfi_startproc
bool GenericAsmParser::ParseDirectiveCFIStartProc(StringRef,
SMLoc DirectiveLoc) {
return false;
}
/// ParseDirectiveCFIEndProc
/// ::= .cfi_endproc
bool GenericAsmParser::ParseDirectiveCFIEndProc(StringRef, SMLoc DirectiveLoc) {
return false;
}
/// ParseDirectiveCFIDefCfaOffset
/// ::= .cfi_def_cfa_offset offset
bool GenericAsmParser::ParseDirectiveCFIDefCfaOffset(StringRef,
SMLoc DirectiveLoc) {
int64_t Offset = 0;
if (getParser().ParseAbsoluteExpression(Offset))
return true;
return false;
}
/// ParseDirectiveCFIDefCfaRegister
/// ::= .cfi_def_cfa_register register
bool GenericAsmParser::ParseDirectiveCFIDefCfaRegister(StringRef,
SMLoc DirectiveLoc) {
int64_t Register = 0;
if (getParser().ParseAbsoluteExpression(Register))
return true;
return false;
}
/// ParseDirectiveCFIOffset
/// ::= .cfi_off register, offset
bool GenericAsmParser::ParseDirectiveCFIOffset(StringRef, SMLoc DirectiveLoc) {
int64_t Register = 0;
int64_t Offset = 0;
if (getParser().ParseAbsoluteExpression(Register))
return true;
if (getLexer().isNot(AsmToken::Comma))
return TokError("unexpected token in directive");
Lex();
if (getParser().ParseAbsoluteExpression(Offset))
return true;
return false;
}
/// ParseDirectiveCFIPersonalityOrLsda
/// ::= .cfi_personality encoding, [symbol_name]
/// ::= .cfi_lsda encoding, [symbol_name]
bool GenericAsmParser::ParseDirectiveCFIPersonalityOrLsda(StringRef,
SMLoc DirectiveLoc) {
int64_t Encoding = 0;
if (getParser().ParseAbsoluteExpression(Encoding))
return true;
if (Encoding == 255)
return false;
if (getLexer().isNot(AsmToken::Comma))
return TokError("unexpected token in directive");
Lex();
StringRef Name;
if (getParser().ParseIdentifier(Name))
return TokError("expected identifier in directive");
return false;
}
/// ParseDirectiveMacrosOnOff
/// ::= .macros_on
/// ::= .macros_off