Add LC_BUILD_VERSION load command

Summary:
Add a new load command LC_BUILD_VERSION. It is a generic version of
LC_*_VERSION_MIN load_command used on Apple platforms. Instead of having
a seperate load command for each platform, LC_BUILD_VERSION is recording
platform info as an enum. It also records SDK version, min_os, and tools
that used to build the binary.

rdar://problem/29781291

Reviewers: enderby

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D29044

llvm-svn: 292824

1 files changed, 21 insertions, 0 deletions

diff --git a/llvm/lib/ObjectYAML/MachOYAML.cpp b/llvm/lib/ObjectYAML/MachOYAML.cpp
index f04956332e0..6b0e4e3762d 100644
--- a/llvm/lib/ObjectYAML/MachOYAML.cpp
+++ b/llvm/lib/ObjectYAML/MachOYAML.cpp
@@ -230,6 +230,12 @@ void mapLoadCommandData<MachO::dylinker_command>(
   IO.mapOptional("PayloadString", LoadCommand.PayloadString);
 }
 
+template <>
+void mapLoadCommandData<MachO::build_version_command>(
+    IO &IO, MachOYAML::LoadCommand &LoadCommand) {
+  IO.mapOptional("Tools", LoadCommand.Tools);
+}
+
 void MappingTraits<MachOYAML::LoadCommand>::mapping(
     IO &IO, MachOYAML::LoadCommand &LoadCommand) {
   MachO::LoadCommandType TempCmd = static_cast<MachO::LoadCommandType>(
@@ -282,6 +288,12 @@ void MappingTraits<MachOYAML::Section>::mapping(IO &IO,
   IO.mapOptional("reserved3", Section.reserved3);
 }
 
+void MappingTraits<MachO::build_tool_version>::mapping(
+    IO &IO, MachO::build_tool_version &tool) {
+  IO.mapRequired("tool", tool.tool);
+  IO.mapRequired("version", tool.version);
+}
+
 void MappingTraits<MachO::dylib>::mapping(IO &IO, MachO::dylib &DylibStruct) {
   IO.mapRequired("name", DylibStruct.name);
   IO.mapRequired("timestamp", DylibStruct.timestamp);
@@ -566,6 +578,15 @@ void MappingTraits<MachO::note_command>::mapping(
   IO.mapRequired("size", LoadCommand.size);
 }
 
+void MappingTraits<MachO::build_version_command>::mapping(
+    IO &IO, MachO::build_version_command &LoadCommand) {
+
+  IO.mapRequired("platform", LoadCommand.platform);
+  IO.mapRequired("minos", LoadCommand.minos);
+  IO.mapRequired("sdk", LoadCommand.sdk);
+  IO.mapRequired("ntools", LoadCommand.ntools);
+}
+
 } // namespace llvm::yaml
 
 } // namespace llvm