Add support for the new LC_NOTE load command.
It describes a region of arbitrary data included in a Mach-O file.
Its initial use is to record extra data in MH_CORE files.
rdar://30001545
rdar://30001731
llvm-svn: 292500
diff --git a/llvm/lib/Object/MachOObjectFile.cpp b/llvm/lib/Object/MachOObjectFile.cpp
index 5b01867..9a1e368 100644
--- a/llvm/lib/Object/MachOObjectFile.cpp
+++ b/llvm/lib/Object/MachOObjectFile.cpp
@@ -784,6 +784,31 @@
return Error::success();
}
+static Error checkNoteCommand(const MachOObjectFile &Obj,
+ const MachOObjectFile::LoadCommandInfo &Load,
+ uint32_t LoadCommandIndex,
+ std::list<MachOElement> &Elements) {
+ if (Load.C.cmdsize != sizeof(MachO::note_command))
+ return malformedError("load command " + Twine(LoadCommandIndex) +
+ " LC_NOTE has incorrect cmdsize");
+ MachO::note_command Nt = getStruct<MachO::note_command>(Obj, Load.Ptr);
+ uint64_t FileSize = Obj.getData().size();
+ if (Nt.offset > FileSize)
+ return malformedError("offset field of LC_NOTE command " +
+ Twine(LoadCommandIndex) + " extends "
+ "past the end of the file");
+ uint64_t BigSize = Nt.offset;
+ BigSize += Nt.size;
+ if (BigSize > FileSize)
+ return malformedError("size field plus offset field of LC_NOTE command " +
+ Twine(LoadCommandIndex) + " extends past the end of "
+ "the file");
+ if (Error Err = checkOverlappingElement(Elements, Nt.offset, Nt.size,
+ "LC_NOTE data"))
+ return Err;
+ return Error::success();
+}
+
static Error checkRpathCommand(const MachOObjectFile &Obj,
const MachOObjectFile::LoadCommandInfo &Load,
uint32_t LoadCommandIndex) {
@@ -1280,6 +1305,9 @@
if ((Err = checkVersCommand(*this, Load, I, &VersLoadCmd,
"LC_VERSION_MIN_WATCHOS")))
return;
+ } else if (Load.C.cmd == MachO::LC_NOTE) {
+ if ((Err = checkNoteCommand(*this, Load, I, Elements)))
+ return;
} else if (Load.C.cmd == MachO::LC_RPATH) {
if ((Err = checkRpathCommand(*this, Load, I)))
return;
@@ -3289,6 +3317,11 @@
return getStruct<MachO::version_min_command>(*this, L.Ptr);
}
+MachO::note_command
+MachOObjectFile::getNoteLoadCommand(const LoadCommandInfo &L) const {
+ return getStruct<MachO::note_command>(*this, L.Ptr);
+}
+
MachO::dylib_command
MachOObjectFile::getDylibIDLoadCommand(const LoadCommandInfo &L) const {
return getStruct<MachO::dylib_command>(*this, L.Ptr);