Add a funciton to get the segment name of a section.
On MachO, sections also have segment names. When a tool looking at a .o file
prints a segment name, this is what they mean. In reality, a .o has only one,
anonymous, segment.
This patch adds a MachO only function to fetch that segment name. I named it
getSectionFinalSegmentName since the main use for the name seems to be informing
the linker with segment this section should go to.
The patch also changes MachOObjectFile::getSectionName to return just the
section name instead of computing SegmentName,SectionName.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170095 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Object/MachOObjectFile.cpp b/lib/Object/MachOObjectFile.cpp
index a38fac7..392563a 100644
--- a/lib/Object/MachOObjectFile.cpp
+++ b/lib/Object/MachOObjectFile.cpp
@@ -473,28 +473,43 @@
return false;
}
+static StringRef parseSegmentOrSectionName(const char *P) {
+ if (P[15] == 0)
+ // Null terminated.
+ return P;
+ // Not null terminated, so this is a 16 char string.
+ return StringRef(P, 16);
+}
+
error_code MachOObjectFile::getSectionName(DataRefImpl DRI,
StringRef &Result) const {
- // FIXME: thread safety.
- static char result[34];
if (is64BitLoadCommand(MachOObj.get(), DRI)) {
LoadCommandInfo LCI = MachOObj->getLoadCommandInfo(DRI.d.a);
InMemoryStruct<macho::Section64> Sect;
MachOObj->ReadSection64(LCI, DRI.d.b, Sect);
-
- strcpy(result, Sect->SegmentName);
- strcat(result, ",");
- strcat(result, Sect->Name);
+ Result = parseSegmentOrSectionName(Sect->Name);
} else {
LoadCommandInfo LCI = MachOObj->getLoadCommandInfo(DRI.d.a);
InMemoryStruct<macho::Section> Sect;
MachOObj->ReadSection(LCI, DRI.d.b, Sect);
-
- strcpy(result, Sect->SegmentName);
- strcat(result, ",");
- strcat(result, Sect->Name);
+ Result = parseSegmentOrSectionName(Sect->Name);
}
- Result = StringRef(result);
+ return object_error::success;
+}
+
+error_code MachOObjectFile::getSectionFinalSegmentName(DataRefImpl Sec,
+ StringRef &Res) const {
+ if (is64BitLoadCommand(MachOObj.get(), Sec)) {
+ LoadCommandInfo LCI = MachOObj->getLoadCommandInfo(Sec.d.a);
+ InMemoryStruct<macho::Section64> Sect;
+ MachOObj->ReadSection64(LCI, Sec.d.b, Sect);
+ Res = parseSegmentOrSectionName(Sect->SegmentName);
+ } else {
+ LoadCommandInfo LCI = MachOObj->getLoadCommandInfo(Sec.d.a);
+ InMemoryStruct<macho::Section> Sect;
+ MachOObj->ReadSection(LCI, Sec.d.b, Sect);
+ Res = parseSegmentOrSectionName(Sect->SegmentName);
+ }
return object_error::success;
}