Android: Add chrome-specific dynamic linker.

base/android/linker/crazy_linker/src/crazy_linker_proc_maps.h

+// Copyright (c) 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 CRAZY_LINKER_PROC_MAPS_H
+#define CRAZY_LINKER_PROC_MAPS_H
+
+// Helper classes and functions to extract useful information out of
+// /proc/self/maps.
+
+#include <stdint.h>
+#include <sys/mman.h>  // for PROT_READ etc...
+
+namespace crazy {
+
+// Find which loaded ELF binary contains |address|.
+// On success, returns true and sets |*load_address| to its load address,
+// and fills |path_buffer| with the path to the corresponding file.
+bool FindElfBinaryForAddress(void* address,
+                             uintptr_t* load_address,
+                             char* path_buffer,
+                             size_t path_buffer_len);
+
+// Returns the current protection bit flags for the page holding a given
+// |address|. On success, returns true and sets |*prot_flags|.
+bool FindProtectionFlagsForAddress(void* address, int* prot_flags);
+
+// Return the load address of a given ELF binary.
+// If |file_name| contains a slash, this will try to perform an
+// exact match with the content of /proc/self/maps. Otherwise,
+// it will be taken as a base name, and the load address of the first
+// matching entry will be returned.
+// On success, returns true and sets |*load_address| to the load address,
+// and |*load_offset| to the load offset.
+bool FindLoadAddressForFile(const char* file_name,
+                            uintptr_t* load_address,
+                            uintptr_t* load_offset);
+
+}  // namespace crazy
+
+#endif  // CRAZY_LINKER_PROC_MAPS_H