[yaml2obj][ELF] Add support for program headers

This change adds basic support for program headers.

I need to do some testing which requires generating program headers but
I can't use ld.lld or clang to produce programs that have headers. I'd
also like to test some strange things that those programs may never
produce.

Patch by Jake Ehrlich

Differential Revision: https://reviews.llvm.org/D35276

llvm-svn: 308520

1 files changed, 38 insertions, 0 deletions

diff --git a/llvm/lib/ObjectYAML/ELFYAML.cpp b/llvm/lib/ObjectYAML/ELFYAML.cpp
index 39741dab327..fd0aa49445f 100644
--- a/llvm/lib/ObjectYAML/ELFYAML.cpp
+++ b/llvm/lib/ObjectYAML/ELFYAML.cpp
@@ -39,6 +39,21 @@ void ScalarEnumerationTraits<ELFYAML::ELF_ET>::enumeration(
   IO.enumFallback<Hex16>(Value);
 }
 
+void ScalarEnumerationTraits<ELFYAML::ELF_PT>::enumeration(
+    IO &IO, ELFYAML::ELF_PT &Value) {
+#define ECase(X) IO.enumCase(Value, #X, ELF::X)
+  ECase(PT_NULL);
+  ECase(PT_LOAD);
+  ECase(PT_DYNAMIC);
+  ECase(PT_INTERP);
+  ECase(PT_NOTE);
+  ECase(PT_SHLIB);
+  ECase(PT_PHDR);
+  ECase(PT_TLS);
+#undef ECase
+  IO.enumFallback<Hex32>(Value);
+}
+
 void ScalarEnumerationTraits<ELFYAML::ELF_EM>::enumeration(
     IO &IO, ELFYAML::ELF_EM &Value) {
 #define ECase(X) IO.enumCase(Value, #X, ELF::X)
@@ -412,6 +427,14 @@ void ScalarEnumerationTraits<ELFYAML::ELF_SHT>::enumeration(
 #undef ECase
 }
 
+void ScalarBitSetTraits<ELFYAML::ELF_PF>::bitset(IO &IO,
+                                                 ELFYAML::ELF_PF &Value) {
+#define BCase(X) IO.bitSetCase(Value, #X, ELF::X)
+  BCase(PF_X);
+  BCase(PF_W);
+  BCase(PF_R);
+}
+
 void ScalarBitSetTraits<ELFYAML::ELF_SHF>::bitset(IO &IO,
                                                   ELFYAML::ELF_SHF &Value) {
   const auto *Object = static_cast<ELFYAML::Object *>(IO.getContext());
@@ -649,6 +672,15 @@ void MappingTraits<ELFYAML::FileHeader>::mapping(IO &IO,
   IO.mapOptional("Entry", FileHdr.Entry, Hex64(0));
 }
 
+void MappingTraits<ELFYAML::ProgramHeader>::mapping(
+    IO &IO, ELFYAML::ProgramHeader &Phdr) {
+  IO.mapRequired("Type", Phdr.Type);
+  IO.mapOptional("Flags", Phdr.Flags, ELFYAML::ELF_PF(0));
+  IO.mapOptional("Sections", Phdr.Sections);
+  IO.mapOptional("VAddr", Phdr.VAddr, Hex64(0));
+  IO.mapOptional("PAddr", Phdr.PAddr, Hex64(0));
+}
+
 namespace {
 
 struct NormalizedOther {
@@ -720,6 +752,11 @@ void MappingTraits<ELFYAML::SectionOrType>::mapping(
   IO.mapRequired("SectionOrType", sectionOrType.sectionNameOrType);
 }
 
+void MappingTraits<ELFYAML::SectionName>::mapping(
+    IO &IO, ELFYAML::SectionName &sectionName) {
+  IO.mapRequired("Section", sectionName.Section);
+}
+
 static void sectionMapping(IO &IO, ELFYAML::MipsABIFlags &Section) {
   commonSectionMapping(IO, Section);
   IO.mapOptional("Version", Section.Version, Hex16(0));
@@ -837,6 +874,7 @@ void MappingTraits<ELFYAML::Object>::mapping(IO &IO, ELFYAML::Object &Object) {
   IO.setContext(&Object);
   IO.mapTag("!ELF", true);
   IO.mapRequired("FileHeader", Object.Header);
+  IO.mapOptional("ProgramHeaders", Object.ProgramHeaders);
   IO.mapOptional("Sections", Object.Sections);
   IO.mapOptional("Symbols", Object.Symbols);
   IO.setContext(nullptr);