linker_globals.h revision d3a07e84a7fdf08a4f68f4549cd2a815418ae746 
1/*
2 * Copyright (C) 2016 The Android Open Source Project
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *  * Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 *  * Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in
12 *    the documentation and/or other materials provided with the
13 *    distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29#ifndef __LINKER_GLOBALS_H
30#define __LINKER_GLOBALS_H
31
32#include <link.h>
33#include <stddef.h>
34
35#include <unordered_map>
36
37#include "private/libc_logging.h"
38
39#define DL_ERR(fmt, x...) \
40    do { \
41      __libc_format_buffer(linker_get_error_buffer(), linker_get_error_buffer_size(), fmt, ##x); \
42      /* If LD_DEBUG is set high enough, log every dlerror(3) message. */ \
43    } while (false)
44
45#define DL_WARN(fmt, x...) \
46    do { \
47      __libc_format_log(ANDROID_LOG_WARN, "linker", fmt, ##x); \
48      __libc_format_fd(2, "WARNING: linker: "); \
49      __libc_format_fd(2, fmt, ##x); \
50      __libc_format_fd(2, "\n"); \
51    } while (false)
52
53#define DL_ERR_AND_LOG(fmt, x...) \
54  do { \
55    DL_ERR(fmt, x); \
56    PRINT(fmt, x); \
57  } while (false)
58
59constexpr ElfW(Versym) kVersymNotNeeded = 0;
60constexpr ElfW(Versym) kVersymGlobal = 1;
61
62// These values are used to call constructors for .init_array && .preinit_array
63extern int g_argc;
64extern char** g_argv;
65extern char** g_envp;
66
67struct soinfo;
68struct android_namespace_t;
69
70extern android_namespace_t g_default_namespace;
71
72extern std::unordered_map<uintptr_t, soinfo*> g_soinfo_handles_map;
73
74// Error buffer "variable"
75char* linker_get_error_buffer();
76size_t linker_get_error_buffer_size();
77
78#endif  /* __LINKER_GLOBALS_H */
79