6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-06-23 01:24:30 +00:00
Code Issues Projects Releases Wiki Activity

Refactor data-in-code annotations.

Browse Source 
Use a dedicated MachO load command to annotate data-in-code regions.
This is the same format the linker produces for final executable images,
allowing consistency of representation and use of introspection tools
for both object and executable files.

Data-in-code regions are annotated via ".data_region"/".end_data_region"
directive pairs, with an optional region type.

data_region_directive := ".data_region" { region_type }
region_type := "jt8" | "jt16" | "jt32" | "jta32"
end_data_region_directive := ".end_data_region"

The previous handling of ARM-style "$d.*" labels was broken and has
been removed. Specifically, it didn't handle ARM vs. Thumb mode when
marking the end of the section.

rdar://11459456

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157062 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jim Grosbach
2012-05-18 19:12:01 +00:00
parent 18e2f6e94c
commit 3e96531186
28 changed files with 411 additions and 215 deletions
Download Patch File Download Diff File Expand all files Collapse all files

42
lib/MC/MCParser/DarwinAsmParser.cpp
View File

@ -14,6 +14,7 @@
#include "llvm/MC/MCSymbol.h"
#include "llvm/MC/MCParser/MCAsmLexer.h"
#include "llvm/MC/MCParser/MCAsmParser.h"
#include "llvm/ADT/StringSwitch.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/Twine.h"
#include "llvm/Support/MemoryBuffer.h"
@ -56,6 +57,9 @@ public:
AddDirectiveHandler<&DarwinAsmParser::ParseDirectiveTBSS>(".tbss");
AddDirectiveHandler<&DarwinAsmParser::ParseDirectiveZerofill>(".zerofill");
AddDirectiveHandler<&DarwinAsmParser::ParseDirectiveDataRegion>(".data_region");
AddDirectiveHandler<&DarwinAsmParser::ParseDirectiveDataRegionEnd>(".end_data_region");
// Special section directives.
AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveConst>(".const");
AddDirectiveHandler<&DarwinAsmParser::ParseSectionDirectiveConstData>(".const_data");
@ -113,6 +117,8 @@ public:
bool ParseDirectiveSubsectionsViaSymbols(StringRef, SMLoc);
bool ParseDirectiveTBSS(StringRef, SMLoc);
bool ParseDirectiveZerofill(StringRef, SMLoc);
bool ParseDirectiveDataRegion(StringRef, SMLoc);
bool ParseDirectiveDataRegionEnd(StringRef, SMLoc);
// Named Section Directive
bool ParseSectionDirectiveConst(StringRef, SMLoc) {
@ -659,6 +665,42 @@ bool DarwinAsmParser::ParseDirectiveZerofill(StringRef, SMLoc) {
return false;
}
/// ParseDirectiveDataRegion
/// ::= .data_region [ ( jt8 | jt16 | jt32 ) ]
bool DarwinAsmParser::ParseDirectiveDataRegion(StringRef, SMLoc) {
if (getLexer().is(AsmToken::EndOfStatement)) {
Lex();
getStreamer().EmitDataRegion(MCDR_DataRegion);
return false;
}
StringRef RegionType;
SMLoc Loc = getParser().getTok().getLoc();
if (getParser().ParseIdentifier(RegionType))
return TokError("expected region type after '.data_region' directive");
int Kind = StringSwitch<int>(RegionType)
.Case("jt8", MCDR_DataRegionJT8)
.Case("jt16", MCDR_DataRegionJT16)
.Case("jt32", MCDR_DataRegionJT32)
.Default(-1);
if (Kind == -1)
return Error(Loc, "unknown region type in '.data_region' directive");
Lex();
getStreamer().EmitDataRegion((MCDataRegionType)Kind);
return false;
}
/// ParseDirectiveDataRegionEnd
/// ::= .end_data_region
bool DarwinAsmParser::ParseDirectiveDataRegionEnd(StringRef, SMLoc) {
if (getLexer().isNot(AsmToken::EndOfStatement))
return TokError("unexpected token in '.end_data_region' directive");
Lex();
getStreamer().EmitDataRegion(MCDR_DataRegionEnd);
return false;
}
namespace llvm {
MCAsmParserExtension *createDarwinAsmParser() {