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
  11 extern int lrotate(long, int);
  12 extern void greet(void);
  13 extern char asmstr[];
  14 extern void *selfptr;
  15 extern void *textptr;
  16 extern int integer, commvar;
  17
  18 int main(void) {
  19
  20     printf("Testing lrotate: should get 0x00400000, 0x00000001\n");
  21     printf("lrotate(0x00040000, 4) = 0x%08lx\n", lrotate(0x40000,4));
  22     printf("lrotate(0x00040000, 14) = 0x%08lx\n", lrotate(0x40000,14));
  23
  24     printf("This string should read `hello, world': `%s'\n", asmstr);
  25
  26     printf("The integers here should be 1234, 1235 and 4321:\n");
  27     integer = 1234;
  28     commvar = 4321;
  29     greet();
  30
  31     printf("These pointers should be equal: %p and %p\n",
  32            &greet, textptr);
  33
  34     printf("So should these: %p and %p\n", selfptr, &selfptr);
  35 }