Improve Android support

This patch remove many Android-specific #ifdefs from the Breakpad
source code. This is achieved by providing "fixed-up" platform
headers (e.g. <signal.h> or <sys/user,h>), in the new directory
src/common/android/include/, which masks differences between
the NDK and GLibc headers.

The old "android_link.h" and "android_ucontext.h" are moved
and renamed.

This also requires putting this directory as the first
include path during Android-hosted builds, hence the
modification of Makefile.am and configure.ac
Review URL: https://breakpad.appspot.com/434002

git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@1017 4c0a9323-5329-0410-9bdc-e9ce6186880e

1 files changed, 159 insertions, 0 deletions

diff --git a/src/common/android/include/elf.h b/src/common/android/include/elf.h
new file mode 100644
index 00000000..debe30be
--- /dev/null
+++ b/src/common/android/include/elf.h
@@ -0,0 +1,159 @@
+// Copyright (c) 2012, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#ifndef GOOGLE_BREAKPAD_COMMON_ANDROID_INCLUDE_ELF_H
+#define GOOGLE_BREAKPAD_COMMON_ANDROID_INCLUDE_ELF_H
+
+#include <stdint.h>
+#include <libgen.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif  // __cplusplus
+
+// The Android <elf.h> provides BSD-based definitions for the ElfXX_Nhdr
+// types 
+// always source-compatible with the GLibc/kernel ones. To overcome this
+// issue without modifying a lot of code in Breakpad, use an ugly macro
+// renaming trick with #include_next
+
+// Avoid conflict with BSD-based definition of ElfXX_Nhdr.
+// Unfortunately, their field member names do not use a 'n_' prefix.
+#define Elf32_Nhdr   __bsd_Elf32_Nhdr
+#define Elf64_Nhdr   __bsd_Elf64_Nhdr
+
+// In case they are defined by the NDK version
+#define Elf32_auxv_t  __bionic_Elf32_auxv_t
+#define Elf64_auxv_t  __bionic_Elf64_auxv_t
+
+#define Elf32_Dyn     __bionic_Elf32_Dyn
+#define Elf64_Dyn     __bionic_Elf64_Dyn
+
+#include_next <elf.h>
+
+#undef Elf32_Nhdr
+#undef Elf64_Nhdr
+
+typedef struct {
+  Elf32_Word n_namesz;
+  Elf32_Word n_descsz;
+  Elf32_Word n_type;
+} Elf32_Nhdr;
+
+typedef struct {
+  Elf64_Word n_namesz;
+  Elf64_Word n_descsz;
+  Elf64_Word n_type;
+} Elf64_Nhdr;
+
+#undef Elf32_auxv_t
+#undef Elf64_auxv_t
+
+typedef struct {
+    uint32_t a_type;
+    union {
+      uint32_t a_val;
+    } a_un;
+} Elf32_auxv_t;
+
+typedef struct {
+    uint64_t a_type;
+    union {
+      uint64_t a_val;
+    } a_un;
+} Elf64_auxv_t;
+
+#undef Elf32_Dyn
+#undef Elf64_Dyn
+
+typedef struct {
+  Elf32_Sword   d_tag;
+  union {
+    Elf32_Word  d_val;
+    Elf32_Addr  d_ptr;
+  } d_un;
+} Elf32_Dyn;
+
+typedef struct {
+  Elf64_Sxword   d_tag;
+  union {
+    Elf64_Xword  d_val;
+    Elf64_Addr   d_ptr;
+  } d_un;
+} Elf64_Dyn;
+
+
+// __WORDSIZE is GLibc-specific and used by Google Breakpad on Linux.
+// All Android platforms are 32-bit for now.
+#ifndef __WORDSIZE
+#define __WORDSIZE 32
+#endif
+
+// The Android headers don't always define this constant.
+#ifndef EM_X86_64
+#define EM_X86_64  62
+#endif
+
+#ifndef EM_PPC64
+#define EM_PPC64   21
+#endif
+
+#ifndef EM_S390
+#define EM_S390    22
+#endif
+
+#if !defined(AT_SYSINFO_EHDR)
+#define AT_SYSINFO_EHDR 33
+#endif
+
+#if !defined(NT_PRSTATUS)
+#define NT_PRSTATUS 1
+#endif
+
+#if !defined(NT_PRPSINFO)
+#define NT_PRPSINFO 3
+#endif
+
+#if !defined(NT_AUXV)
+#define NT_AUXV   6
+#endif
+
+#if !defined(NT_PRXFPREG)
+#define NT_PRXFPREG 0x46e62b7f
+#endif
+
+#if !defined(NT_FPREGSET)
+#define NT_FPREGSET 2
+#endif
+
+#ifdef __cplusplus
+}  // extern "C"
+#endif  // __cplusplus
+
+#endif  // GOOGLE_BREAKPAD_COMMON_ANDROID_INCLUDE_ELF_H