| | 1 | /*- |
| | 2 | * Copyright (c) 1994 |
| | 3 | * The Regents of the University of California. 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 | * 1. Redistributions of source code must retain the above copyright |
| | 9 | * notice, this list of conditions and the following disclaimer. |
| | 10 | * 2. Redistributions in binary form must reproduce the above copyright |
| | 11 | * notice, this list of conditions and the following disclaimer in the |
| | 12 | * documentation and/or other materials provided with the distribution. |
| | 13 | * 3. Neither the name of the University nor the names of its contributors |
| | 14 | * may be used to endorse or promote products derived from this software |
| | 15 | * without specific prior written permission. |
| | 16 | * |
| | 17 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| | 18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| | 19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| | 20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| | 21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| | 22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| | 23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| | 24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| | 25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| | 26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| | 27 | * SUCH DAMAGE. |
| | 28 | * |
| | 29 | * $FreeBSD: src/include/dlfcn.h,v 1.24 2010/03/24 15:59:51 gahr Exp $ |
| | 30 | */ |
| | 31 | |
| | 32 | #ifndef _DLFCN_H_ |
| | 33 | #define _DLFCN_H_ |
| | 34 | |
| | 35 | #include <sys/cdefs.h> |
| | 36 | #include <machine/stdint.h> /* size_t */ |
| | 37 | |
| | 38 | /* |
| | 39 | * Modes and flags for dlopen(). |
| | 40 | */ |
| | 41 | #define RTLD_LAZY 1 /* Bind function calls lazily. */ |
| | 42 | #define RTLD_NOW 2 /* Bind function calls immediately. */ |
| | 43 | #define RTLD_MODEMASK 0x3 |
| | 44 | #define RTLD_GLOBAL 0x100 /* Make symbols globally available. */ |
| | 45 | #define RTLD_LOCAL 0 /* Opposite of RTLD_GLOBAL, and the default. */ |
| | 46 | #define RTLD_TRACE 0x200 /* Trace loaded objects and exit. */ |
| | 47 | #define RTLD_NODELETE 0x01000 /* Do not remove members. */ |
| | 48 | #define RTLD_NOLOAD 0x02000 /* Do not load if not already loaded. */ |
| | 49 | |
| | 50 | /* |
| | 51 | * Request arguments for dlinfo(). |
| | 52 | */ |
| | 53 | #define RTLD_DI_LINKMAP 2 /* Obtain link map. */ |
| | 54 | #define RTLD_DI_SERINFO 4 /* Obtain search path info. */ |
| | 55 | #define RTLD_DI_SERINFOSIZE 5 /* ... query for required space. */ |
| | 56 | #define RTLD_DI_ORIGIN 6 /* Obtain object origin */ |
| | 57 | #define RTLD_DI_MAX RTLD_DI_ORIGIN |
| | 58 | |
| | 59 | /* |
| | 60 | * Special handle arguments for dlsym()/dlinfo(). |
| | 61 | */ |
| | 62 | #define RTLD_NEXT ((void *) -1) /* Search subsequent objects. */ |
| | 63 | #define RTLD_DEFAULT ((void *) -2) /* Use default search algorithm. */ |
| | 64 | #define RTLD_SELF ((void *) -3) /* Search the caller itself. */ |
| | 65 | |
| | 66 | #if __BSD_VISIBLE |
| | 67 | /* |
| | 68 | * Structure filled in by dladdr(). |
| | 69 | */ |
| | 70 | typedef struct dl_info { |
| | 71 | const char *dli_fname; /* Pathname of shared object. */ |
| | 72 | void *dli_fbase; /* Base address of shared object. */ |
| | 73 | const char *dli_sname; /* Name of nearest symbol. */ |
| | 74 | void *dli_saddr; /* Address of nearest symbol. */ |
| | 75 | } Dl_info; |
| | 76 | |
| | 77 | /* |
| | 78 | * Avoid sys/types.h namespace pollution. |
| | 79 | */ |
| | 80 | |
| | 81 | /* |
| | 82 | * Structures, returned by the RTLD_DI_SERINFO dlinfo() request. |
| | 83 | */ |
| | 84 | typedef struct dl_serpath { |
| | 85 | char * dls_name; /* single search path entry */ |
| | 86 | unsigned int dls_flags; /* path information */ |
| | 87 | } Dl_serpath; |
| | 88 | |
| | 89 | typedef struct dl_serinfo { |
| | 90 | __size_t dls_size; /* total buffer size */ |
| | 91 | unsigned int dls_cnt; /* number of path entries */ |
| | 92 | Dl_serpath dls_serpath[1]; /* there may be more than one */ |
| | 93 | } Dl_serinfo; |
| | 94 | |
| | 95 | /* |
| | 96 | * The actual type declared by this typedef is immaterial, provided that |
| | 97 | * it is a function pointer. Its purpose is to provide a return type for |
| | 98 | * dlfunc() which can be cast to a function pointer type without depending |
| | 99 | * on behavior undefined by the C standard, which might trigger a compiler |
| | 100 | * diagnostic. We intentionally declare a unique type signature to force |
| | 101 | * a diagnostic should the application not cast the return value of dlfunc() |
| | 102 | * appropriately. |
| | 103 | */ |
| | 104 | struct __dlfunc_arg { |
| | 105 | int __dlfunc_dummy; |
| | 106 | }; |
| | 107 | |
| | 108 | typedef void (*dlfunc_t)(struct __dlfunc_arg); |
| | 109 | |
| | 110 | #endif /* __BSD_VISIBLE */ |
| | 111 | |
| | 112 | __BEGIN_DECLS |
| | 113 | /* XSI functions first. */ |
| | 114 | int dlclose(void *); |
| | 115 | char *dlerror(void); |
| | 116 | void *dlopen(const char *, int); |
| | 117 | void *dlsym(void * __restrict, const char * __restrict); |
| | 118 | |
| | 119 | #if __BSD_VISIBLE |
| | 120 | void *fdlopen(int, int); |
| | 121 | int dladdr(const void * __restrict, Dl_info * __restrict); |
| | 122 | dlfunc_t dlfunc(void * __restrict, const char * __restrict); |
| | 123 | int dlinfo(void * __restrict, int, void * __restrict); |
| | 124 | void *dlvsym(void * __restrict, const char * __restrict, |
| | 125 | const char * __restrict); |
| | 126 | #endif /* __BSD_VISIBLE */ |
| | 127 | __END_DECLS |
| | 128 | |
| | 129 | #endif /* !_DLFCN_H_ */ |
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