Darwin: Add assembler directives to create version-min load commands.

Allow object files to be tagged with a version-min load command for iOS
or MacOSX.

Teach macho-dump to understand the version-min load commands for
testcases.

rdar://11337778

llvm-svn: 204190

1 files changed, 13 insertions, 0 deletions

diff --git a/llvm/lib/Object/MachOObjectFile.cpp b/llvm/lib/Object/MachOObjectFile.cpp
index 450693f64e1..6b1dd875958 100644
--- a/llvm/lib/Object/MachOObjectFile.cpp
+++ b/llvm/lib/Object/MachOObjectFile.cpp
@@ -214,6 +214,14 @@ void SwapStruct(MachO::linker_options_command &C) {
 }
 
 template<>
+void SwapStruct(MachO::version_min_command&C) {
+  SwapValue(C.cmd);
+  SwapValue(C.cmdsize);
+  SwapValue(C.version);
+  SwapValue(C.reserved);
+}
+
+template<>
 void SwapStruct(MachO::data_in_code_entry &C) {
   SwapValue(C.offset);
   SwapValue(C.length);
@@ -1467,6 +1475,11 @@ MachOObjectFile::getLinkerOptionsLoadCommand(const LoadCommandInfo &L) const {
   return getStruct<MachO::linker_options_command>(this, L.Ptr);
 }
 
+MachO::version_min_command
+MachOObjectFile::getVersionMinLoadCommand(const LoadCommandInfo &L) const {
+  return getStruct<MachO::version_min_command>(this, L.Ptr);
+}
+
 MachO::any_relocation_info
 MachOObjectFile::getRelocation(DataRefImpl Rel) const {
   const char *P = reinterpret_cast<const char *>(Rel.p);