1 // Copyright (c) 2012, Google Inc.
2 // All rights reserved.
3 //
4 // Redistribution and use in source and binary forms, with or without
5 // modification, are permitted provided that the following conditions are
6 // met:
7 //
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9 // notice, this list of conditions and the following disclaimer.
10 //     * Redistributions in binary form must reproduce the above
11 // copyright notice, this list of conditions and the following disclaimer
12 // in the documentation and/or other materials provided with the
13 // distribution.
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15 // contributors may be used to endorse or promote products derived from
16 // this software without specific prior written permission.
17 //
18 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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21 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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28 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 
30 #ifndef GOOGLE_BREAKPAD_COMMON_ANDROID_INCLUDE_ELF_H
31 #define GOOGLE_BREAKPAD_COMMON_ANDROID_INCLUDE_ELF_H
32 
33 #include <stdint.h>
34 #include <libgen.h>
35 
36 #ifdef __cplusplus
37 extern "C" {
38 #endif  // __cplusplus
39 
40 // The Android <elf.h> provides BSD-based definitions for the ElfXX_Nhdr
41 // types
42 // always source-compatible with the GLibc/kernel ones. To overcome this
43 // issue without modifying a lot of code in Breakpad, use an ugly macro
44 // renaming trick with #include_next
45 
46 // Avoid conflict with BSD-based definition of ElfXX_Nhdr.
47 // Unfortunately, their field member names do not use a 'n_' prefix.
48 #define Elf32_Nhdr   __bsd_Elf32_Nhdr
49 #define Elf64_Nhdr   __bsd_Elf64_Nhdr
50 
51 // In case they are defined by the NDK version
52 #define Elf32_auxv_t  __bionic_Elf32_auxv_t
53 #define Elf64_auxv_t  __bionic_Elf64_auxv_t
54 
55 #define Elf32_Dyn     __bionic_Elf32_Dyn
56 #define Elf64_Dyn     __bionic_Elf64_Dyn
57 
58 #include_next <elf.h>
59 
60 #undef Elf32_Nhdr
61 #undef Elf64_Nhdr
62 
63 typedef struct {
64   Elf32_Word n_namesz;
65   Elf32_Word n_descsz;
66   Elf32_Word n_type;
67 } Elf32_Nhdr;
68 
69 typedef struct {
70   Elf64_Word n_namesz;
71   Elf64_Word n_descsz;
72   Elf64_Word n_type;
73 } Elf64_Nhdr;
74 
75 #undef Elf32_auxv_t
76 #undef Elf64_auxv_t
77 
78 typedef struct {
79     uint32_t a_type;
80     union {
81       uint32_t a_val;
82     } a_un;
83 } Elf32_auxv_t;
84 
85 typedef struct {
86     uint64_t a_type;
87     union {
88       uint64_t a_val;
89     } a_un;
90 } Elf64_auxv_t;
91 
92 #undef Elf32_Dyn
93 #undef Elf64_Dyn
94 
95 typedef struct {
96   Elf32_Sword   d_tag;
97   union {
98     Elf32_Word  d_val;
99     Elf32_Addr  d_ptr;
100   } d_un;
101 } Elf32_Dyn;
102 
103 typedef struct {
104   Elf64_Sxword   d_tag;
105   union {
106     Elf64_Xword  d_val;
107     Elf64_Addr   d_ptr;
108   } d_un;
109 } Elf64_Dyn;
110 
111 
112 // __WORDSIZE is GLibc-specific and used by Google Breakpad on Linux.
113 #ifndef __WORDSIZE
114 #if defined(__i386__) ||  defined(__ARM_EABI__) || defined(__mips__)
115 #define __WORDSIZE 32
116 #elif defined(__x86_64__) || defined(__aarch64__)
117 #define __WORDSIZE 64
118 #else
119 #error "Unsupported Android CPU ABI"
120 #endif
121 #endif
122 
123 // The Android headers don't always define this constant.
124 #ifndef EM_X86_64
125 #define EM_X86_64  62
126 #endif
127 
128 #ifndef EM_PPC64
129 #define EM_PPC64   21
130 #endif
131 
132 #ifndef EM_S390
133 #define EM_S390    22
134 #endif
135 
136 #if !defined(AT_SYSINFO_EHDR)
137 #define AT_SYSINFO_EHDR 33
138 #endif
139 
140 #if !defined(NT_PRSTATUS)
141 #define NT_PRSTATUS 1
142 #endif
143 
144 #if !defined(NT_PRPSINFO)
145 #define NT_PRPSINFO 3
146 #endif
147 
148 #if !defined(NT_AUXV)
149 #define NT_AUXV   6
150 #endif
151 
152 #if !defined(NT_PRXFPREG)
153 #define NT_PRXFPREG 0x46e62b7f
154 #endif
155 
156 #if !defined(NT_FPREGSET)
157 #define NT_FPREGSET 2
158 #endif
159 
160 #if !defined(SHT_MIPS_DWARF)
161 #define SHT_MIPS_DWARF 0x7000001e
162 #endif
163 
164 #ifdef __cplusplus
165 }  // extern "C"
166 #endif  // __cplusplus
167 
168 #endif  // GOOGLE_BREAKPAD_COMMON_ANDROID_INCLUDE_ELF_H
169