none/tests/x86-solaris/syscalls.c

   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) \
   9 do { \
  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
  21 static 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
  29 int 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