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Teach MachO which sections contain code

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170349 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Tim Northover
2012-12-17 17:59:32 +00:00
parent 2dfa3eb566
commit 1c2b2f9c56
5 changed files with 10 additions and 3 deletions
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4
include/llvm/Object/MachOFormat.h
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@ -237,6 +237,10 @@ namespace macho {
/// @name Section Data /// @name Section Data
/// @{ /// @{
enum SectionFlags {
SF_PureInstructions = 0x80000000
};
struct Section { struct Section {
char Name[16]; char Name[16];
char SegmentName[16]; char SegmentName[16];

2
lib/MC/MCParser/DarwinAsmParser.cpp
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@ -314,7 +314,7 @@ bool DarwinAsmParser::ParseSectionSwitch(const char *Segment,
Lex(); Lex();
// FIXME: Arch specific. // FIXME: Arch specific.
bool isText = StringRef(Segment) == "__TEXT"; // FIXME: Hack. bool isText = TAA & MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS;
getStreamer().SwitchSection(getContext().getMachOSection( getStreamer().SwitchSection(getContext().getMachOSection(
Segment, Section, TAA, StubSize, Segment, Section, TAA, StubSize,
isText ? SectionKind::getText() isText ? SectionKind::getText()

4
lib/Object/MachOObjectFile.cpp
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@ -559,11 +559,11 @@ error_code MachOObjectFile::isSectionText(DataRefImpl DRI,
if (is64BitLoadCommand(MachOObj.get(), DRI)) { if (is64BitLoadCommand(MachOObj.get(), DRI)) {
InMemoryStruct<macho::Section64> Sect; InMemoryStruct<macho::Section64> Sect;
getSection64(DRI, Sect); getSection64(DRI, Sect);
Result = !strcmp(Sect->Name, "__text"); Result = Sect->Flags & macho::SF_PureInstructions;
} else { } else {
InMemoryStruct<macho::Section> Sect; InMemoryStruct<macho::Section> Sect;
getSection(DRI, Sect); getSection(DRI, Sect);
Result = !strcmp(Sect->Name, "__text"); Result = Sect->Flags & macho::SF_PureInstructions;
} }
return object_error::success; return object_error::success;
} }

BIN
test/Object/Inputs/macho-text-sections.macho-x86_64 Normal file
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3
test/Object/X86/macho-text-sections.test Normal file
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@ -0,0 +1,3 @@
RUN: llvm-objdump -disassemble %p/../Inputs/macho-text-sections.macho-x86_64 | FileCheck %s
CHECK: Disassembly of section __notext,__notext