test/elftest.c

   1 /*
   2  * test source file for assembling to ELF
   3  * build with:
   4  *    nasm -f elf elftest.asm
   5  *    gcc -o elftest elftest.c elftest.o
   6  * (assuming your gcc is ELF)
   7  */
   8
   9 #include <stdio.h>
  10 #include <inttypes.h>
  11
  12 extern int lrotate(int32_t, int);
  13 extern void greet(void);
  14 extern int8_t asmstr[];
  15 extern void *selfptr;
  16 extern void *textptr;
  17 extern int integer, commvar;
  18
  19 int main(void)
  20 {
  21
  22     printf("Testing lrotate: should get 0x00400000, 0x00000001\n");
  23     printf("lrotate(0x00040000, 4) = 0x%08lx\n", lrotate(0x40000, 4));
  24     printf("lrotate(0x00040000, 14) = 0x%08lx\n", lrotate(0x40000, 14));
  25
  26     printf("This string should read `hello, world': `%s'\n", asmstr);
  27
  28     printf("The integers here should be 1234, 1235 and 4321:\n");
  29     integer = 1234;
  30     commvar = 4321;
  31     greet();
  32
  33     printf("These pointers should be equal: %p and %p\n", &greet, textptr);
  34
  35     printf("So should these: %p and %p\n", selfptr, &selfptr);
  36
  37     return 0;
  38 }