1/* Test that all instructions that make syscalls are handled correctly.
2   Note that it isn't possible to run this program natively. */
3
4#include <stdio.h>
5#include <sys/syscall.h>
6#include <sys/trap.h>
7
8#define SYSCALL(instr, scnum, out) \
9do { \
10__asm__ __volatile__( \
11   "movl %1,%%eax\n" \
12   "leal 0f,%%edx\n" /* Set return address for SYSENTER. */ \
13   instr "\n" \
14   "0:\n" \
15   "movl %%eax,%0\n" \
16   : "=m" (out) \
17   : "i" (scnum) \
18   : "eax", "edx", "cc", "memory"); \
19} while (0)
20
21static void check_pid(int pid, int pid2, const char *instr)
22{
23   if (pid == pid2)
24      return;
25
26   fprintf(stderr, "Pid values differ, instruction: %s\n", instr);
27}
28
29int main(void)
30{
31   int pid, pid2, dummy;
32
33   /* Normal Solaris/x86 syscall instructions. */
34   SYSCALL("int $0x91", SYS_getpid, pid);
35
36   /* AMD's syscall instruction. */
37   SYSCALL("syscall", SYS_getpid, pid2);
38   check_pid(pid, pid2, "syscall");
39
40   /* Intel's sysenter instruction. */
41   SYSCALL("sysenter", SYS_getpid, pid2);
42   check_pid(pid, pid2, "sysenter");
43
44   /* Linux syscall instructions that are handled as "int $0x91". */
45   SYSCALL("int $0x80", SYS_getpid, pid2);
46   check_pid(pid, pid2, "int $0x80");
47
48   SYSCALL("int $0x81", SYS_getpid, pid2);
49   check_pid(pid, pid2, "int $0x81");
50
51   SYSCALL("int $0x82", SYS_getpid, pid2);
52   check_pid(pid, pid2, "int $0x82");
53
54   /* Fasttraps. */
55   SYSCALL("int $0xd2", T_GETHRTIME, dummy);
56
57   return 0;
58}
59
60