2 * SPDX-License-Identifier: BSD-3-Clause
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37 #include <sys/_types.h>
40 * Modes and flags for dlopen().
42 #define RTLD_LAZY 1 /* Bind function calls lazily. */
43 #define RTLD_NOW 2 /* Bind function calls immediately. */
44 #define RTLD_MODEMASK 0x3
45 #define RTLD_GLOBAL 0x100 /* Make symbols globally available. */
46 #define RTLD_LOCAL 0 /* Opposite of RTLD_GLOBAL, and the default. */
47 #define RTLD_TRACE 0x200 /* Trace loaded objects and exit. */
48 #define RTLD_NODELETE 0x01000 /* Do not remove members. */
49 #define RTLD_NOLOAD 0x02000 /* Do not load if not already loaded. */
50 #define RTLD_DEEPBIND 0x04000 /* Put symbols from the dso ahead of
54 * Request arguments for dlinfo().
56 #define RTLD_DI_LINKMAP 2 /* Obtain link map. */
57 #define RTLD_DI_SERINFO 4 /* Obtain search path info. */
58 #define RTLD_DI_SERINFOSIZE 5 /* ... query for required space. */
59 #define RTLD_DI_ORIGIN 6 /* Obtain object origin */
60 #define RTLD_DI_MAX RTLD_DI_ORIGIN
63 * Special handle arguments for dlsym()/dlinfo().
65 #define RTLD_NEXT ((void *) -1) /* Search subsequent objects. */
66 #define RTLD_DEFAULT ((void *) -2) /* Use default search algorithm. */
67 #define RTLD_SELF ((void *) -3) /* Search the caller itself. */
71 #ifndef _SIZE_T_DECLARED
72 typedef __size_t size_t;
73 #define _SIZE_T_DECLARED
77 * Structure filled in by dladdr().
79 typedef struct dl_info {
80 const char *dli_fname; /* Pathname of shared object. */
81 void *dli_fbase; /* Base address of shared object. */
82 const char *dli_sname; /* Name of nearest symbol. */
83 void *dli_saddr; /* Address of nearest symbol. */
87 * The actual type declared by this typedef is immaterial, provided that
88 * it is a function pointer. Its purpose is to provide a return type for
89 * dlfunc() which can be cast to a function pointer type without depending
90 * on behavior undefined by the C standard, which might trigger a compiler
91 * diagnostic. We intentionally declare a unique type signature to force
92 * a diagnostic should the application not cast the return value of dlfunc()
99 typedef void (*dlfunc_t)(struct __dlfunc_arg);
102 * Structures, returned by the RTLD_DI_SERINFO dlinfo() request.
104 typedef struct dl_serpath {
105 char * dls_name; /* single search path entry */
106 unsigned int dls_flags; /* path information */
109 typedef struct dl_serinfo {
110 size_t dls_size; /* total buffer size */
111 unsigned int dls_cnt; /* number of path entries */
112 Dl_serpath dls_serpath[1]; /* there may be more than one */
115 #endif /* __BSD_VISIBLE */
118 /* XSI functions first. */
121 void *dlopen(const char *, int);
122 void *dlsym(void * __restrict, const char * __restrict);
125 void *fdlopen(int, int);
126 int dladdr(const void * __restrict, Dl_info * __restrict);
127 dlfunc_t dlfunc(void * __restrict, const char * __restrict);
128 int dlinfo(void * __restrict, int, void * __restrict);
129 void dllockinit(void *_context,
130 void *(*_lock_create)(void *_context),
131 void (*_rlock_acquire)(void *_lock),
132 void (*_wlock_acquire)(void *_lock),
133 void (*_lock_release)(void *_lock),
134 void (*_lock_destroy)(void *_lock),
135 void (*_context_destroy)(void *_context));
136 void *dlvsym(void * __restrict, const char * __restrict,
137 const char * __restrict);
138 #endif /* __BSD_VISIBLE */
141 #endif /* !_DLFCN_H_ */