1: exit 10: unlink 33: access 64: getpagesize 3: read 12: chdir 37: kill 108: sigvec 4: write 17: sbrk 38: stat 136: mkdir 5: open 19: lseek 47: getgid 137: rmdir 6: close 20: getpid 54: ioctl 139: setcontext 8: creat 24: getuid 62: fstat
The getpid() call always returns 0x2000. Similarly, getuid() always returns 100. The kill() call returns EINVAL if the signal is sent to any process other than 0x2000. The getgid() call always returns 10. Ioctl() calls will almost certainly not have the desired effect. The setcontext() call is used to return from the sigtramp signal handler dispatcher.