Trurl-based/_LinuxOpenBSD_/Lin/Rsrc/loader/BlackBox-dl.c

   1 #include <dlfcn.h>
   2 #include <stdio.h>
   3
   4 int main (int argc, char *argv[])
   5 {
   6         void * h;
   7         /*
   8         void * h1;
   9         void (*SetKernelBaseStack) (int);
  10         void (*Init) (void);
  11         */
  12         int res;
  13
  14         h = dlopen("libBB.so", RTLD_LAZY | RTLD_GLOBAL);
  15         if (h != NULL) {
  16                 /*
  17                 h1 = dlsym(h, "SetKernelBaseStack");
  18                 if (h1 != NULL) {
  19                         *(void **) (&SetKernelBaseStack) = h1;
  20                         h1 = dlsym(h, "Init");
  21                         if (h1 != NULL) {
  22                                 *(void **) (&Init) = h1;
  23
  24                                 asm ("movl %%esp, %[res]" : [res] "=m" (res) );
  25                                 SetKernelBaseStack(res - 8);
  26
  27                                 printf("before Init()\n");
  28                                 Init();
  29                                 printf("after Init()\n");
  30
  31                                 res = 0;
  32                         } else {
  33                                 perror(dlerror());
  34                                 res = 3;
  35                         }
  36                 } else {
  37                         perror(dlerror());
  38                         res = 2;
  39                 }
  40                 */
  41                 res = 0;
  42         } else {
  43                 perror(dlerror());
  44                 res = 1;
  45         }
  46
  47         return res;
  48 }