vendor/lld/lld-trunk-r256633

1 files changed, 66 insertions, 0 deletions

diff --git a/lib/ReaderWriter/ELF/FileCommon.cpp b/lib/ReaderWriter/ELF/FileCommon.cpp
new file mode 100644
index 000000000000..c23e3f6656cd
--- /dev/null
+++ b/lib/ReaderWriter/ELF/FileCommon.cpp
@@ -0,0 +1,66 @@
+//===- lib/ReaderWriter/ELF/FileCommon.cpp --------------------------------===//
+//
+//                             The LLVM Linker
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "ELFFile.h"
+#include "FileCommon.h"
+
+using namespace llvm::ELF;
+
+namespace lld {
+namespace elf {
+
+static const char *elf32_expected = "ELF32 expected, but got ELF64";
+static const char *elf64_expected = "ELF64 expected, but got ELF32";
+static const char *le_expected =
+      "Little endian files are expected, but got a big endian file.";
+static const char *be_expected =
+      "Big endian files are expected, but got a little endian file.";
+
+template <>
+std::error_code checkCompatibility<ELF32LE>(unsigned char size,
+                                            unsigned char endian) {
+  if (size == ELFCLASS64)
+    return make_dynamic_error_code(elf32_expected);
+  if (endian == ELFDATA2MSB)
+    return make_dynamic_error_code(le_expected);
+  return std::error_code();
+}
+
+template <>
+std::error_code checkCompatibility<ELF32BE>(unsigned char size,
+                                            unsigned char endian) {
+  if (size == ELFCLASS64)
+    return make_dynamic_error_code(elf32_expected);
+  if (endian == ELFDATA2LSB)
+    return make_dynamic_error_code(be_expected);
+  return std::error_code();
+}
+
+template <>
+std::error_code checkCompatibility<ELF64LE>(unsigned char size,
+                                            unsigned char endian) {
+  if (size == ELFCLASS32)
+    return make_dynamic_error_code(elf64_expected);
+  if (endian == ELFDATA2MSB)
+    return make_dynamic_error_code(le_expected);
+  return std::error_code();
+}
+
+template <>
+std::error_code checkCompatibility<ELF64BE>(unsigned char size,
+                                            unsigned char endian) {
+  if (size == ELFCLASS32)
+    return make_dynamic_error_code(elf64_expected);
+  if (endian == ELFDATA2LSB)
+    return make_dynamic_error_code(be_expected);
+  return std::error_code();
+}
+
+} // end namespace elf
+} // end namespace lld