Teach MachO which sections contain code

llvm-svn: 170349

5 files changed, 10 insertions, 3 deletions

diff --git a/llvm/include/llvm/Object/MachOFormat.h b/llvm/include/llvm/Object/MachOFormat.h
index c0f700d3c87..a17d58dae23 100644
--- a/llvm/include/llvm/Object/MachOFormat.h
+++ b/llvm/include/llvm/Object/MachOFormat.h
@@ -237,6 +237,10 @@ namespace macho {
   /// @name Section Data
   /// @{
 
+  enum SectionFlags {
+    SF_PureInstructions = 0x80000000
+  };
+
   struct Section {
     char Name[16];
     char SegmentName[16];
diff --git a/llvm/lib/MC/MCParser/DarwinAsmParser.cpp b/llvm/lib/MC/MCParser/DarwinAsmParser.cpp
index 20c949dbdaa..7b042df292e 100644
--- a/llvm/lib/MC/MCParser/DarwinAsmParser.cpp
+++ b/llvm/lib/MC/MCParser/DarwinAsmParser.cpp
@@ -314,7 +314,7 @@ bool DarwinAsmParser::ParseSectionSwitch(const char *Segment,
   Lex();
 
   // FIXME: Arch specific.
-  bool isText = StringRef(Segment) == "__TEXT";  // FIXME: Hack.
+  bool isText = TAA & MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS;
   getStreamer().SwitchSection(getContext().getMachOSection(
                                 Segment, Section, TAA, StubSize,
                                 isText ? SectionKind::getText()
diff --git a/llvm/lib/Object/MachOObjectFile.cpp b/llvm/lib/Object/MachOObjectFile.cpp
index a38fac78aae..40f5390a96f 100644
--- a/llvm/lib/Object/MachOObjectFile.cpp
+++ b/llvm/lib/Object/MachOObjectFile.cpp
@@ -559,11 +559,11 @@ error_code MachOObjectFile::isSectionText(DataRefImpl DRI,
   if (is64BitLoadCommand(MachOObj.get(), DRI)) {
     InMemoryStruct<macho::Section64> Sect;
     getSection64(DRI, Sect);
-    Result = !strcmp(Sect->Name, "__text");
+    Result = Sect->Flags & macho::SF_PureInstructions;
   } else {
     InMemoryStruct<macho::Section> Sect;
     getSection(DRI, Sect);
-    Result = !strcmp(Sect->Name, "__text");
+    Result = Sect->Flags & macho::SF_PureInstructions;
   }
   return object_error::success;
 }
diff --git a/llvm/test/Object/Inputs/macho-text-sections.macho-x86_64 b/llvm/test/Object/Inputs/macho-text-sections.macho-x86_64
new file mode 100644
index 00000000000..cce203ba0d8
--- /dev/null
+++ b/llvm/test/Object/Inputs/macho-text-sections.macho-x86_64
diff --git a/llvm/test/Object/X86/macho-text-sections.test b/llvm/test/Object/X86/macho-text-sections.test
new file mode 100644
index 00000000000..1b697dcadad
--- /dev/null
+++ b/llvm/test/Object/X86/macho-text-sections.test
@@ -0,0 +1,3 @@
+RUN: llvm-objdump -disassemble %p/../Inputs/macho-text-sections.macho-x86_64 | FileCheck %s
+
+CHECK: Disassembly of section __notext,__notext