add support for LLVM ghash sections

src/llvm/llvm.c

@@ -0,0 +1,24 @@
+// Copyright (c) Epic Games Tools
+// Licensed under the MIT license (https://opensource.org/license/mit/)
+
+internal String8
+llvm_string_from_ghash_alg(LLVM_GHashAlg v)
+{
+  switch (v) {
+  case LLVM_GHashAlg_SHA1:   return str8_lit("SHA1");
+  case LLVM_GHashAlg_SHA1_8: return str8_lit("SHA1_8");
+  case LLVM_GHashAlg_BLAKE3: return str8_lit("BALK3");
+  }
+  return str8_zero();
+}
+
+internal U64
+llvm_hash_size_from_alg(LLVM_GHashAlg v)
+{
+  switch (v) {
+  case LLVM_GHashAlg_SHA1:   return 20;
+  case LLVM_GHashAlg_SHA1_8: return 8;
+  case LLVM_GHashAlg_BLAKE3: return 8;
+  }
+  return 0;
+}

src/llvm/llvm.h

@@ -0,0 +1,29 @@
+// Copyright (c) Epic Games Tools
+// Licensed under the MIT license (https://opensource.org/license/mit/)
+
+#ifndef LLVM_H
+#define LLVM_H
+
+#define LLVM_GHash_Magic 0x133c9c5
+#define LLVM_GHash_CurrentVersion 0
+
+typedef U16 LLVM_GHashAlg;
+typedef enum LLVM_GHashAlgEnum
+{
+  LLVM_GHashAlg_SHA1   = 0,
+  LLVM_GHashAlg_SHA1_8 = 1,
+  LLVM_GHashAlg_BLAKE3 = 2,
+} LLVM_GHashAlgEnum;
+
+typedef struct LLVM_GHash
+{
+  U32           magic;
+  LLVM_GHashAlg hash_alg;
+  U16           version;
+  // * hashes[]
+} LLVM_GHash;
+
+internal String8 llvm_string_from_ghash_alg(LLVM_GHashAlg v);
+
+#endif // LLVM_H
+