AMDGPU: Emit runtime metadata version 2 as YAML

Differential Revision: https://reviews.llvm.org/D25046

llvm-svn: 289674

1 files changed, 32 insertions, 0 deletions

diff --git a/llvm/tools/llvm-readobj/ELFDumper.cpp b/llvm/tools/llvm-readobj/ELFDumper.cpp
index dbeb03df9f4..a200c10296b 100644
--- a/llvm/tools/llvm-readobj/ELFDumper.cpp
+++ b/llvm/tools/llvm-readobj/ELFDumper.cpp
@@ -129,6 +129,8 @@ public:
   void printMipsReginfo() override;
   void printMipsOptions() override;
 
+  void printAMDGPURuntimeMD() override;
+
   void printStackMap() const override;
 
   void printHashHistogram() override;
@@ -2339,6 +2341,36 @@ template <class ELFT> void ELFDumper<ELFT>::printMipsOptions() {
   }
 }
 
+template <class ELFT> void ELFDumper<ELFT>::printAMDGPURuntimeMD() {
+  const Elf_Shdr *Shdr = findSectionByName(*Obj, ".note");
+  if (!Shdr) {
+    W.startLine() << "There is no .note section in the file.\n";
+    return;
+  }
+  ArrayRef<uint8_t> Sec = unwrapOrError(Obj->getSectionContents(Shdr));
+
+  const uint32_t RuntimeMDNoteType = 7;
+  for (auto I = reinterpret_cast<const uint32_t *>(&Sec[0]),
+       E = I + Sec.size()/4; I != E;) {
+    uint32_t NameSZ = I[0];
+    uint32_t DescSZ = I[1];
+    uint32_t Type = I[2];
+    I += 3;
+
+    StringRef Name;
+    if (NameSZ) {
+      Name = StringRef(reinterpret_cast<const char *>(I), NameSZ - 1);
+      I += alignTo<4>(NameSZ)/4;
+    }
+
+    if (Name == "AMD" && Type == RuntimeMDNoteType) {
+      StringRef Desc(reinterpret_cast<const char *>(I), DescSZ);
+      W.printString(Desc);
+    }
+    I += alignTo<4>(DescSZ)/4;
+  }
+}
+
 template <class ELFT> void ELFDumper<ELFT>::printStackMap() const {
   const Elf_Shdr *StackMapSection = nullptr;
   for (const auto &Sec : unwrapOrError(Obj->sections())) {