Initial implementation of Bare Metal Mode for NaCl.

components/nacl/loader/bare_metal/elf_util.h

Index: components/nacl/loader/bare_metal/elf_util.h
diff --git a/components/nacl/loader/bare_metal/elf_util.h b/components/nacl/loader/bare_metal/elf_util.h
new file mode 100644
index 0000000000000000000000000000000000000000..e1e113ad43ce6cfc87b04e1ebd0e0c4693407f3f
--- /dev/null
+++ b/components/nacl/loader/bare_metal/elf_util.h
@@ -0,0 +1,54 @@
+/*
+ * Copyright 2013 The Chromium Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef COMPONENTS_NACL_LOADER_BARE_METAL_ELF_UTIL_H_
+#define COMPONENTS_NACL_LOADER_BARE_METAL_ELF_UTIL_H_
+
+#include "build/build_config.h"
+
+/*
+ * This module provides utilities for ELF binary. Temporarily forked from
+ * native_client/src/trusted/service_runtime/elf_util.{h,c}.
+ * TODO(hidehiko): Unify with it after Bare Metal Mode gets stable.

[Mark Seaborn, 2013/12/06 03:21:16]

I should say now that I am not expecting such a unification to happen. :-) 
That's partly because NaCl and Bare Metal Mode will have subtly different
requirements for how to ELF-load (e.g. whether to support ET_DYN, and what
constraints to place on the PT_LOAD segments).  But also, ELF loading is simple
enough that it's just not worth having an awkward-to-maintain cross-repo
dependency just for some trivial ELF header reading code.  So I think it's
better just to have a clean and minimal version in the Chromium repo than try to
merge them.

[hidehiko, 2013/12/06 17:40:02]

I see. Done. Let's revisit here, when we move the code to nacl's repository
after bare metal gets stabled enough.

+ */
+
+#ifndef OS_LINUX
+#error Bare Metal is currently supported only on linux.
+#endif
+
+#include "components/nacl/loader/bare_metal/bare_metal_error_code.h"
+#include "native_client/src/include/portability.h"
+
+struct NaClBareMetalElfImage;
+struct NaClDesc;
+
+/*
+ * Reads the ELF file from the descriptor, and creates an image instance.
+ */
+struct NaClBareMetalElfImage *NaClBareMetalElfImageNew(
+    struct NaClDesc *descriptor,
+    NaClBareMetalErrorCode *error_code);
+
+/*
+ * Releases the image instance allocated by NaClBareMetalElfImageNew declared
+ * above.
+ */
+void NaClBareMetalElfImageDelete(struct NaClBareMetalElfImage *image);
+
+/*
+ * Returns the entry point address of the given ELF image.
+ */
+uintptr_t NaClBareMetalElfImageGetEntryPoint(
+    struct NaClBareMetalElfImage *image);
+
+/*
+ * Loads an ELF executable for Bare Metal nacl.
+ */
+NaClBareMetalErrorCode NaClBareMetalElfImageLoad(
+    struct NaClBareMetalElfImage *image,
+    struct NaClDesc *descriptor);
+
+#endif  /* COMPONENTS_NACL_LOADER_BARE_METAL_ELF_UTIL_H_ */