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 60
