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  1. /*
  2.  * Copyright (c) 2008 Jiri Svoboda
  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.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. /** @addtogroup rtld rtld
  30.  * @brief
  31.  * @{
  32.  */
  33. /**
  34.  * @file
  35.  */
  36.  
  37. #include <stdio.h>
  38. #include <stdlib.h>
  39. #include <dlfcn.h>
  40.  
  41. /* From librtld. */
  42. #include <module.h>
  43. #include <symbol.h>
  44.  
  45. void *dlopen(const char *path, int flag)
  46. {
  47.     module_t *m;
  48.  
  49.     printf("dlopen(\"%s\", %d)\n", path, flag);
  50.  
  51.     printf("module_find('%s')\n", path);
  52.     m = module_find(path);
  53.     if (m == NULL) {
  54.         printf("NULL. module_load('%s')\n", path);
  55.         m = module_load(path);
  56.         printf("module_load_deps(m)\n");
  57.         module_load_deps(m);
  58.     } else {
  59.         printf("not NULL\n");
  60.     }
  61.  
  62.     return (void *) m;
  63. }
  64.  
  65. /*
  66.  * @note Symbols with NULL values are not accounted for.
  67.  * @note Symbol search scope is not correct. Should only
  68.  *   look in @a mod and its dependencies.
  69.  */
  70. void *dlsym(void *mod, const char *sym_name)
  71. {
  72.     elf_symbol_t *sd;
  73.     module_t *sm;
  74.  
  75.     printf("dlsym(0x%lx, \"%s\")\n", (long)mod, sym_name);
  76.     sd = symbol_def_find(sym_name, (module_t *) mod, &sm);
  77.     if (sd != NULL) {
  78.         return symbol_get_addr(sd, sm);
  79.     }
  80.  
  81.     return NULL;
  82. }
  83.  
  84. /** @}
  85.  */
  86.