include/dlfcn.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Stub dlfcn implementation for systems that lack shared library support
   4  * but obviously can still reference compiled-in symbols.
   5  */
   6
   7 #ifndef NO_SHARED_LIBS
   8 #include_next <dlfcn.h>
   9 #else
  10
  11 #define RTLD_LAZY 0
  12 #define RTLD_GLOBAL 1
  13 #define _FAKE_DLFCN_HDL (void *)0xbeefcafe
  14
  15 static inline void *dlopen(const char *file, int flag)
  16 {
  17         if (file == NULL)
  18                 return _FAKE_DLFCN_HDL;
  19         else
  20                 return NULL;
  21 }
  22
  23 void *_dlsym(const char *sym);
  24 static inline void *dlsym(void *handle, const char *sym)
  25 {
  26         if (handle != _FAKE_DLFCN_HDL)
  27                 return NULL;
  28         return _dlsym(sym);
  29 }
  30
  31 static inline char *dlerror(void)
  32 {
  33         return NULL;
  34 }
  35
  36 static inline int dlclose(void *handle)
  37 {
  38         return (handle == _FAKE_DLFCN_HDL) ? 0 : 1;
  39 }
  40
  41 #endif