struct dirent * readdir (DIR * dirp) {
static struct dirent ent;
int ret = syscall_readdir(dirp->fd, ++dirp->cur_entry, &ent);
if (ret < 0) {
errno = -ret;
memset(&ent, 0, sizeof(struct dirent));
return NULL;
}
if (ret == 0) {
/* end of directory */
memset(&ent, 0, sizeof(struct dirent));
return NULL;
}
return &ent;
}
int systemcall(struct PAR_REGS *regs)
{
char *cpp1, *cpp2, **cppp1; //3, *cpp4, *cpp5, *cpp6, **cppp1, **cppp2;
int i, ip1, ip2;
//unsigned long old_cr0;
switch (regs->eax) // Sys call number ?
{
case 0: return syscall_test();
case 1:
cpp1 = CHARPPAR(regs->ebx);
if (cpp1 < KERNELEND) return EINVALIDPTR;
return syscall_open(CHARPPAR(regs->ebx), INTPAR(regs->ebx+4), INTPAR(regs+4+4));
case 2: return syscall_close(INTPAR(regs->ebx));
case 3:
cpp1 = CHARPPAR(regs->ebx+4);
if (cpp1 < KERNELEND) return EINVALIDPTR;
return syscall_read(INTPAR(regs->ebx), cpp1, INTPAR(regs->ebx+4+4));
case 4:
cpp1 = CHARPPAR(regs->ebx+4);
if (cpp1 < KERNELEND) return EINVALIDPTR;
return syscall_write(INTPAR(regs->ebx), cpp1, INTPAR(regs->ebx+4+4));
case 5: return syscall_lseek(INTPAR(regs->ebx), INTPAR(regs->ebx+4), INTPAR(regs->ebx+4+4));
case 6:
cpp1 = CHARPPAR(regs->ebx);
if (cpp1 < KERNELEND) return EINVALIDPTR;
return syscall_mkdir(cpp1, INTPAR(regs->ebx+4));
case 7:
cpp1 = CHARPPAR(regs->ebx);
if (cpp1 < KERNELEND) return EINVALIDPTR;
return syscall_rmdir(cpp1);
case 8:
cpp1 = CHARPPAR(regs->ebx);
if (cpp1 < KERNELEND) return EINVALIDPTR;
return syscall_chdir(cpp1);
case 9:
cpp1 = CHARPPAR(regs->ebx);
if (cpp1 < KERNELEND) return EINVALIDPTR;
return syscall_creat(cpp1, INTPAR(regs->ebx+4));
case 10:
cpp1 = CHARPPAR(regs->ebx);
if (cpp1 < KERNELEND) return EINVALIDPTR;
cpp1 = CHARPPAR(regs->ebx+4);
if (cpp1 < KERNELEND) return EINVALIDPTR;
return syscall_rename(CHARPPAR(regs->ebx), CHARPPAR(regs->ebx+4));
case 11:
cpp1 = CHARPPAR(regs->ebx);
if (cpp1 < KERNELEND) return EINVALIDPTR;
cpp1 = CHARPPAR(regs->ebx+4);
if (cpp1 < KERNELEND) return EINVALIDPTR;
return (int) syscall_opendir(CHARPPAR(regs->ebx), (DIR *)CHARPPAR(regs->ebx+4));
case 12:
cpp1 = CHARPPAR(regs->ebx);
if (cpp1 < KERNELEND) return EINVALIDPTR;
return syscall_closedir((DIR *) CHARPPAR(regs->ebx));
case 13:
cpp1 = CHARPPAR(regs->ebx);
if (cpp1 < KERNELEND) return EINVALIDPTR;
return (int) syscall_readdir((DIR *)CHARPPAR(regs->ebx));
case 14:
cpp1 = CHARPPAR(regs->ebx);
if (cpp1 < KERNELEND) return EINVALIDPTR;
cpp1 = CHARPPAR(regs->ebx+4);
if (cpp1 < KERNELEND) return EINVALIDPTR;
return syscall_stat(CHARPPAR(regs->ebx),(struct stat *)CHARPPAR(regs->ebx+4));
case 15:
cpp1 = CHARPPAR(regs->ebx);
if (cpp1 < KERNELEND) return EINVALIDPTR;
return syscall_unlink(CHARPPAR(regs->ebx));
case 16:
cpp1 = CHARPPAR(regs->ebx);
if (cpp1 < KERNELEND) return EINVALIDPTR;
return syscall_chmod(CHARPPAR(regs->ebx),(mode_t)INTPAR(regs->ebx+4));
case 17:
ip1 = INTPAR(regs->ebx);
return syscall_dup(ip1);
case 18:
ip1 = INTPAR(regs->ebx);
ip2 = INTPAR(regs->ebx + 4);
return syscall_dup2(ip1, ip2);
case 19: syscall_setcursor( INTPAR(regs->ebx),INTPAR(regs->ebx+4)); return 0;
case 20: return syscall_getchar();
case 21: return syscall_getchare();
case 22: return syscall_getscanchar();
case 23: return syscall_putchar(CHARPAR(regs->ebx));
case 24:
cpp1 = CHARPPAR(regs->ebx);
if (cpp1 < KERNELEND) return EINVALIDPTR;
return syscall_puts(CHARPPAR(regs->ebx));
case 25:
cpp1 = CHARPPAR(regs->ebx);
ip1 = INTPAR(regs->ebx + 4);
syscall_seekdir((DIR *)cpp1, ip1);
return 0;
case 26:
cpp1 = CHARPPAR(regs->ebx);
return syscall_telldir((DIR *)cpp1);
case 27:
cpp1 = CHARPPAR(regs->ebx);
syscall_rewinddir((DIR *)cpp1);
return 0;
case 32:
cpp1 = CHARPPAR(regs->ebx+12);
if (cpp1 < KERNELEND) return EINVALIDPTR;
return syscall_readblocks(INTPAR(regs->ebx), INTPAR(regs->ebx+4), INTPAR(regs->ebx+8), CHARPPAR(regs->ebx+12));
case 33:
cpp1 = CHARPPAR(regs->ebx+12);
if (cpp1 < KERNELEND) return EINVALIDPTR;
return syscall_writeblocks(INTPAR(regs->ebx), INTPAR(regs->ebx+4), INTPAR(regs->ebx+8), CHARPPAR(regs->ebx+12));
case 34: syscall_sync(0); return 0;
case 50: syscall_tsleep(INTPAR(regs->ebx)); return 0;
case 60:
cpp1 = CHARPPAR(regs->ebx + 4);
if (cpp1 < KERNELEND) return EINVALIDPTR;
return syscall_tsendto(SHORTPAR(regs->ebx), CHARPPAR(regs->ebx+4), INTPAR(regs->ebx+8), INTPAR(regs->ebx+12), INTPAR(regs->ebx+16), SHORTPAR(regs->ebx+20));
case 62:
cpp1 = CHARPPAR(regs->ebx);
if (cpp1 < KERNELEND) return EINVALIDPTR;
cpp1 = CHARPPAR(regs->ebx + 8);
if (cpp1 < KERNELEND) return EINVALIDPTR;
return syscall_trecvfrom(CHARPPAR(regs->ebx), INTPAR(regs->ebx+4), SHORTPPAR(regs->ebx+8), INTPAR(regs->ebx+12));
case 65:
cpp1 = CHARPPAR(regs->ebx);
if (cpp1 < KERNELEND) return EINVALIDPTR;
cppp1 = (char **)CHARPPAR(regs->ebx+4);
i = 0;
while (cppp1[i] != NULL)
{
if (cppp1[i] < KERNELEND) return EINVALIDPTR;
i++;
}
cppp1 = (char **)CHARPPAR(regs->ebx+8);
i = 0;
while (cppp1[i] != NULL)
{
if (cppp1[i] < KERNELEND) return EINVALIDPTR;
i++;
}
return syscall_exectask(CHARPPAR(regs->ebx), (char **)CHARPPAR(regs->ebx+4), (char **)CHARPPAR(regs->ebx+8), INTPAR(regs->ebx+12));
case 66: syscall_exit(INTPAR(regs->ebx)); return 0;
case 70:
cpp1 = CHARPPAR(regs->ebx);
if (cpp1 < KERNELEND) return EINVALIDPTR;
cpp1 = CHARPPAR(regs->ebx+4);
if (cpp1 < KERNELEND && cpp1 != NULL) return EINVALIDPTR;
cpp1 = CHARPPAR(regs->ebx+8);
if (cpp1 < KERNELEND) return EINVALIDPTR;
cpp1 = CHARPPAR(regs->ebx+12);
if (cpp1 < KERNELEND && cpp1 != NULL) return EINVALIDPTR;
return syscall_pthread_create((pthread_t *)INTPPAR(regs->ebx), (pthread_attr_t *)CHARPPAR(regs->ebx+4), (void *(*)(void *))INTPPAR(regs->ebx+8), (void *)CHARPPAR(regs->ebx+12));
case 71:
cpp1 = CHARPPAR(regs->ebx);
if (cpp1 < KERNELEND && cpp1 != NULL) return EINVALIDPTR;
syscall_pthread_exit((void *)CHARPPAR(regs->ebx)); return 0;
case 72:
cpp1 = CHARPPAR(regs->ebx+4);
if (cpp1 < KERNELEND && cpp1 != NULL) return EINVALIDPTR;
return syscall_pthread_join((pthread_t)INTPAR(regs->ebx), (void **)CHARPPAR(regs->ebx+4));
case 73: return syscall_pthread_detach((pthread_t)INTPAR(regs->ebx));
case 74: return syscall_pthread_yield();
case 75:
cpp1 = CHARPPAR(regs->ebx);
if (cpp1 < KERNELEND) return EINVALIDPTR;
cpp1 = CHARPPAR(regs->ebx+4);
if (cpp1 < KERNELEND && cpp1 != NULL) return EINVALIDPTR;
return syscall_pthread_mutex_init((pthread_mutex_t *)INTPAR(regs->ebx), (pthread_mutexattr_t *)CHARPPAR(regs->ebx+4));
case 76:
cpp1 = CHARPPAR(regs->ebx);
if (cpp1 < KERNELEND) return EINVALIDPTR;
return syscall_pthread_mutex_trylock((pthread_mutex_t *)INTPAR(regs->ebx));
case 77:
cpp1 = CHARPPAR(regs->ebx);
if (cpp1 < KERNELEND) return EINVALIDPTR;
return syscall_pthread_mutex_lock((pthread_mutex_t *)INTPAR(regs->ebx));
case 78:
cpp1 = CHARPPAR(regs->ebx);
if (cpp1 < KERNELEND) return EINVALIDPTR;
return syscall_pthread_mutex_unlock((pthread_mutex_t *)INTPAR(regs->ebx));
case 79:
cpp1 = CHARPPAR(regs->ebx);
if (cpp1 < KERNELEND) return EINVALIDPTR;
cpp1 = CHARPPAR(regs->ebx+4);
if (cpp1 < KERNELEND && cpp1 != NULL) return EINVALIDPTR;
return syscall_pthread_cond_init((pthread_cond_t *)INTPAR(regs->ebx), (pthread_condattr_t *)CHARPPAR(regs->ebx+4));
case 80:
cpp1 = CHARPPAR(regs->ebx);
if (cpp1 < KERNELEND) return EINVALIDPTR;
cpp1 = CHARPPAR(regs->ebx+4);
if (cpp1 < KERNELEND && cpp1 != NULL) return EINVALIDPTR;
return syscall_pthread_cond_wait((pthread_cond_t *)INTPAR(regs->ebx), (pthread_mutex_t *)INTPPAR(regs->ebx+4));
case 81:
cpp1 = CHARPPAR(regs->ebx);
if (cpp1 < KERNELEND) return EINVALIDPTR;
return syscall_pthread_cond_signal((pthread_cond_t *)INTPAR(regs->ebx));
case 82:
cpp1 = CHARPPAR(regs->ebx);
if (cpp1 < KERNELEND) return EINVALIDPTR;
return syscall_pthread_cond_broadcast((pthread_cond_t *)INTPAR(regs->ebx));
case 83:
cpp1 = CHARPPAR(regs->ebx);
if (cpp1 < KERNELEND) return EINVALIDPTR;
cpp1 = CHARPPAR(regs->ebx+4);
if (cpp1 < KERNELEND && cpp1 != NULL) return EINVALIDPTR;
return syscall_pthread_barrier_init((pthread_barrier_t *)INTPAR(regs->ebx), (pthread_barrierattr_t *)INTPPAR(regs->ebx+4), INTPAR(regs->ebx+8));
case 84:
cpp1 = CHARPPAR(regs->ebx);
if (cpp1 < KERNELEND) return EINVALIDPTR;
return syscall_pthread_barrier_wait((pthread_barrier_t *)INTPAR(regs->ebx));
case 90: return syscall_socket(INTPAR(regs->ebx), INTPAR(regs->ebx+4), INTPAR(regs->ebx+8));
case 91:
cpp1 = CHARPPAR(regs->ebx+4);
if (cpp1 < KERNELEND) return EINVALIDPTR;
return syscall_bind(INTPAR(regs->ebx), (struct sockaddr *)INTPPAR(regs->ebx+4), SHORTPAR(regs->ebx+8));
case 92:
cpp1 = CHARPPAR(regs->ebx + 4);
if (cpp1 < KERNELEND) return EINVALIDPTR;
return syscall_recv(INTPAR(regs->ebx), (void *)CHARPPAR(regs->ebx+4), (size_t)INTPAR(regs->ebx+8), INTPAR(regs->ebx+12));
case 93:
cpp1 = CHARPPAR(regs->ebx + 4);
if (cpp1 < KERNELEND) return EINVALIDPTR;
cpp1 = CHARPPAR(regs->ebx+16);
if (cpp1 < KERNELEND && cpp1 != NULL) return EINVALIDPTR;
cpp1 = CHARPPAR(regs->ebx+20);
if (cpp1 < KERNELEND && cpp1 != NULL) return EINVALIDPTR;
return syscall_recvfrom(INTPAR(regs->ebx), (void *)CHARPPAR(regs->ebx+4), (size_t)INTPAR(regs->ebx+8), INTPAR(regs->ebx+12), (struct sockaddr *)CHARPPAR(regs->ebx+16), (socklen_t *)SHORTPPAR(regs->ebx+20));
case 94:
cpp1 = CHARPPAR(regs->ebx + 4);
if (cpp1 < KERNELEND) return EINVALIDPTR;
return syscall_send(INTPAR(regs->ebx), (void *)CHARPPAR(regs->ebx+4), (size_t)INTPAR(regs->ebx+8), INTPAR(regs->ebx+12));
case 95:
cpp1 = CHARPPAR(regs->ebx + 4);
if (cpp1 < KERNELEND) return EINVALIDPTR;
cpp1 = CHARPPAR(regs->ebx + 16);
if (cpp1 < KERNELEND) return EINVALIDPTR;
return syscall_sendto(INTPAR(regs->ebx), (void *)CHARPPAR(regs->ebx+4), (size_t)INTPAR(regs->ebx+8), INTPAR(regs->ebx+12), (struct sockaddr *)CHARPPAR(regs->ebx+16), (socklen_t)SHORTPAR(regs->ebx+20));
case 96:
cpp1 = CHARPPAR(regs->ebx + 4);
if (cpp1 < KERNELEND) return EINVALIDPTR;
return syscall_connect(INTPAR(regs->ebx), (struct sockaddr *)CHARPPAR(regs->ebx+4), (socklen_t)SHORTPAR(regs->ebx+8));
case 97:
cpp1 = CHARPPAR(regs->ebx + 4);
if (cpp1 < KERNELEND) return EINVALIDPTR;
cpp1 = CHARPPAR(regs->ebx + 8);
if (cpp1 < KERNELEND) return EINVALIDPTR;
return syscall_accept(INTPAR(regs->ebx), (struct sockaddr *)CHARPPAR(regs->ebx+4), (socklen_t *)CHARPPAR(regs->ebx+8));
case 98: return syscall_listen(INTPAR(regs->ebx), INTPAR(regs->ebx+4));
case 99: return syscall_kill(INTPAR(regs->ebx));
case 100:
cpp1 = CHARPPAR(regs->ebx + 4);
if (cpp1 < KERNELEND) return EINVALIDPTR;
return syscall_getprocinfo(INTPAR(regs->ebx), (struct uprocinfo *)INTPPAR(regs->ebx+4));
case 101:
cpp1 = CHARPPAR(regs->ebx);
if (cpp1 < KERNELEND) return EINVALIDPTR;
return syscall_getpids(INTPPAR(regs->ebx), INTPAR(regs->ebx+4));
case 102:
cpp1 = CHARPPAR(regs->ebx);
if (cpp1 < KERNELEND) return EINVALIDPTR;
return syscall_sem_init((sem_t *)(CHARPPAR(regs->ebx)), INTPAR(regs->ebx+4), (unsigned int)INTPAR(regs->ebx+8));
case 103:
cpp1 = CHARPPAR(regs->ebx);
if (cpp1 < KERNELEND) return EINVALIDPTR;
return syscall_sem_destroy((sem_t *)(CHARPPAR(regs->ebx)));
case 104:
cpp1 = CHARPPAR(regs->ebx);
if (cpp1 < KERNELEND) return EINVALIDPTR;
cpp1 = CHARPPAR(regs->ebx+16);
if (cpp1 < KERNELEND) return EINVALIDPTR;
return (int)syscall_sem_open(CHARPPAR(regs->ebx), INTPAR(regs->ebx+4), (mode_t)INTPAR(regs->ebx+8), INTPAR(regs->ebx+12), (sem_t *)CHARPPAR(regs->ebx+16));
case 105:
cpp1 = CHARPPAR(regs->ebx);
if (cpp1 < KERNELEND) return EINVALIDPTR;
return syscall_sem_close((sem_t *)(CHARPPAR(regs->ebx)));
case 106:
cpp1 = CHARPPAR(regs->ebx);
if (cpp1 < KERNELEND) return EINVALIDPTR;
return syscall_sem_unlink(CHARPPAR(regs->ebx));
case 107:
cpp1 = CHARPPAR(regs->ebx);
if (cpp1 < KERNELEND) return EINVALIDPTR;
return syscall_sem_wait((sem_t *)(CHARPPAR(regs->ebx)));
case 108:
cpp1 = CHARPPAR(regs->ebx);
if (cpp1 < KERNELEND) return EINVALIDPTR;
return syscall_sem_trywait((sem_t *)(CHARPPAR(regs->ebx)));
case 109:
cpp1 = CHARPPAR(regs->ebx);
if (cpp1 < KERNELEND) return EINVALIDPTR;
cpp1 = CHARPPAR(regs->ebx+4);
if (cpp1 < KERNELEND) return EINVALIDPTR;
return syscall_sem_timedwait((sem_t *)(CHARPPAR(regs->ebx)), (const struct timespec *)CHARPPAR(regs->ebx+4));
case 110:
cpp1 = CHARPPAR(regs->ebx);
if (cpp1 < KERNELEND) return EINVALIDPTR;
return syscall_sem_post((sem_t *)(CHARPPAR(regs->ebx)));
case 111:
cpp1 = CHARPPAR(regs->ebx);
if (cpp1 < KERNELEND) return EINVALIDPTR;
cpp1 = CHARPPAR(regs->ebx+4);
if (cpp1 < KERNELEND) return EINVALIDPTR;
return syscall_sem_getvalue((sem_t *)(CHARPPAR(regs->ebx)), INTPPAR(regs->ebx+4));
case 112:
cpp1 = CHARPPAR(regs->ebx);
if (cpp1 < KERNELEND && cpp1 != NULL) return EINVALIDPTR;
return (int)syscall_time((time_t *)(CHARPPAR(regs->ebx)));
case 113: return (int)syscall_pthread_self();
case 114:
cpp1 = CHARPPAR(regs->ebx);
if (cpp1 < KERNELEND && cpp1 != NULL) return EINVALIDPTR;
return syscall_brk((void *)CHARPPAR(regs->ebx));
case 115:
cpp1 = CHARPPAR(regs->ebx);
if (cpp1 < KERNELEND) return EINVALIDPTR;
cpp1 = CHARPPAR(regs->ebx+4);
if (cpp1 < KERNELEND) return EINVALIDPTR;
cpp1 = CHARPPAR(regs->ebx+8);
if (cpp1 < KERNELEND) return EINVALIDPTR;
return syscall_gettsc((unsigned int *)INTPPAR(regs->ebx), (unsigned int *)INTPPAR(regs->ebx+4), (unsigned int *)INTPPAR(regs->ebx+8));
case 140:
print_core_info();
print_minf_statistics();
return 0;
case 147:
cpp1 = CHARPPAR(regs->ebx);
if (cpp1 < KERNELEND) return EINVALIDPTR;
return syscall_wait(INTPPAR(regs->ebx));
case 148:
return syscall_pageinfo(INTPAR(regs->ebx), INTPAR(regs->ebx+4));
case 153:
syscall_machid();
return 0;
case 154:
return syscall_getcharf(INTPAR(regs->ebx));
case 155:
return syscall_ungetcharf(INTPAR(regs->ebx), INTPAR(regs->ebx+4));
case 156:
printk("broadcast called\n");
return syscall_broadcast(INTPAR(regs->ebx), CHARPPAR(regs->ebx+4), INTPAR(regs->ebx+8));
case 157:
return syscall_primalloc((unsigned int)INTPAR(regs->ebx));
case 158:
cpp1 = CHARPPAR(regs->ebx);
if (cpp1 < KERNELEND) return EINVALIDPTR;
return syscall_prifree((void *)CHARPPAR(regs->ebx), (unsigned int)INTPAR(regs->ebx+4));
case 202:
cpp1 = CHARPPAR(regs->ebx);
if (cpp1 < KERNELEND) return EINVALIDPTR;
cpp2 = CHARPPAR(regs->ebx + 4);
if (cpp2 < KERNELEND) return EINVALIDPTR;
mark_tsc((unsigned int *)cpp1, (unsigned int *)cpp2);
return 0;
case 203:
return (secs * 1000 + millesecs);
case 204:
cpp1 = CHARPPAR(regs->ebx);
if (cpp1 < KERNELEND) return EINVALIDPTR;
return syscall_pthread_mutex_destroy((pthread_mutex_t *) cpp1);
default: return syscall_notimplemented(regs->eax);
}
}
static void
syscall_handler (struct intr_frame *f)
{
int nsyscall, i;
int *esp = (int *)f -> esp;
if(!is_valid(esp))
thread_exit();
int *arg_int[3];
void **arg_ptr[3];
// Get system call number.
nsyscall = *(esp++);
/* argc number
0:
SYS_HALT
1:
SYS_EXIT, SYS_EXEC, SYS_WAIT, SYS_TELL, SYS_REMOVE, SYS_OPEN, SYS_CLOSE, SYS_FILESIZE
2:
SYS_CREATE, SYS_SEEK
3:
SYS_READ, SYS_WRITE
*/
if(nsyscall == SYS_HALT) {
shutdown_power_off();
}
else if(nsyscall == SYS_EXIT) {
for(i = 0; i < 1; i++) {
if(is_valid((esp+i))) {
arg_int[i] = esp + i;
}
else thread_exit();
}
syscall_exit(*arg_int[0]);
}
else if(nsyscall == SYS_EXEC) {
for(i = 0; i < 1; i++) {
if(is_valid((esp+i))) {
arg_ptr[i] = (void **)(esp + i);
}
else thread_exit();
}
if(!is_valid(*arg_ptr[0]))
thread_exit();
lock_acquire(&lock_sys);
f->eax = process_execute(*arg_ptr[0]);
lock_release(&lock_sys);
}
else if(nsyscall == SYS_WAIT) {
for(i = 0; i < 1; i++) {
if(is_valid((esp+i))) {
arg_int[i] = esp + i;
}
else thread_exit();
}
f->eax = process_wait(*arg_int[0]);
}
else if(nsyscall == SYS_TELL) {
for(i = 0; i < 1; i++) {
if(is_valid((esp+i))) {
arg_int[i] = esp + i;
}
else thread_exit();
}
lock_acquire(&lock_sys);
f->eax = syscall_tell(*arg_int[0]);
lock_release(&lock_sys);
}
else if(nsyscall == SYS_REMOVE) {
for(i = 0; i < 1; i++) {
if(is_valid((esp+i))) {
arg_ptr[i] = (void **)(esp + i);
}
else thread_exit();
}
if(!is_valid(*arg_ptr[0]))
thread_exit();
lock_acquire(&lock_sys);
f->eax = filesys_remove(*arg_ptr[0]);
lock_release(&lock_sys);
}
else if(nsyscall == SYS_OPEN) {
for(i = 0; i < 1; i++) {
if(is_valid((esp+i))) {
arg_ptr[i] = (void **)(esp + i);
}
else thread_exit();
}
if(!is_valid(*arg_ptr[0]))
thread_exit();
lock_acquire(&lock_sys);
f->eax = syscall_open(*arg_ptr[0]);
lock_release(&lock_sys);
}
else if(nsyscall == SYS_CLOSE) {
for(i = 0; i < 1; i++) {
if(is_valid((esp+i))) {
arg_int[i] = esp + i;
}
else thread_exit();
}
lock_acquire(&lock_sys);
syscall_close(*arg_int[0]);
lock_release(&lock_sys);
}
else if(nsyscall == SYS_FILESIZE) {
for(i = 0; i < 1; i++) {
if(is_valid((esp+i))) {
arg_int[i] = esp + i;
}
else thread_exit();
}
lock_acquire(&lock_sys);
f->eax = syscall_filesize(*arg_int[0]);
lock_release(&lock_sys);
}
else if(nsyscall == SYS_CREATE) {
for(i = 0; i < 2; i++) {
if(is_valid((esp+i))) {
arg_int[i] = esp + i;
arg_ptr[i] = (void **)(esp + i);
}
else thread_exit();
}
if(!is_valid(*arg_ptr[0]))
thread_exit();
lock_acquire(&lock_sys);
f->eax = filesys_create(*arg_ptr[0], *arg_int[1]);
lock_release(&lock_sys);
}
else if(nsyscall == SYS_SEEK) {
for(i = 0; i < 2; i++) {
if(is_valid((esp+i))) {
arg_int[i] = esp + i;
}
else thread_exit();
}
lock_acquire(&lock_sys);
syscall_seek(*arg_int[0], *arg_int[1]);
lock_release(&lock_sys);
}
else if(nsyscall == SYS_READ) {
for(i = 0; i < 3; i++) {
if(is_valid((esp+i))) {
arg_int[i] = esp + i;
arg_ptr[i] = (void **)(esp + i);
}
else thread_exit();
}
if(!is_valid(*arg_ptr[1]))
thread_exit();
lock_acquire(&lock_sys);
f->eax = syscall_read(*arg_int[0], *arg_ptr[1], *arg_int[2]);
lock_release(&lock_sys);
}
else if(nsyscall == SYS_WRITE) {
for(i = 0; i < 3; i++) {
if(is_valid((esp+i))) {
arg_int[i] = esp + i;
arg_ptr[i] = (void **)(esp + i);
}
else thread_exit();
}
if(!is_valid(*arg_ptr[1]))
thread_exit();
lock_acquire(&lock_sys);
f->eax = syscall_write(*arg_int[0], *arg_ptr[1], *arg_int[2]);
lock_release(&lock_sys);
}
else if(nsyscall == SYS_CHDIR) {
for(i = 0; i < 1; i++) {
if(is_valid((esp+i))) {
arg_ptr[i] = (void **)(esp + i);
}
else thread_exit();
}
if(!is_valid(*arg_ptr[0]))
thread_exit();
lock_acquire(&lock_sys);
f->eax = syscall_chdir(*arg_ptr[0]);
lock_release(&lock_sys);
}
else if(nsyscall == SYS_MKDIR) {
for(i = 0; i < 1; i++) {
if(is_valid((esp+i))) {
arg_ptr[i] = (void **)(esp + i);
}
else thread_exit();
}
if(!is_valid(*arg_ptr[0]))
thread_exit();
lock_acquire(&lock_sys);
f->eax = syscall_mkdir(*arg_ptr[0]);
lock_release(&lock_sys);
}
else if(nsyscall == SYS_READDIR) {
for(i = 0; i < 2; i++) {
if(is_valid((esp+i))) {
arg_int[i] = esp + i;
arg_ptr[i] = (void **)(esp + i);
}
else thread_exit();
}
if(!is_valid(*arg_ptr[1]))
thread_exit();
lock_acquire(&lock_sys);
f->eax = syscall_readdir(*arg_int[0], *arg_ptr[1]);
lock_release(&lock_sys);
}
else if(nsyscall == SYS_ISDIR) {
for(i = 0; i < 1; i++) {
if(is_valid((esp+i))) {
arg_int[i] = esp + i;
}
else thread_exit();
}
lock_acquire(&lock_sys);
f->eax = syscall_isdir(*arg_int[0]);
lock_release(&lock_sys);
}
else if(nsyscall == SYS_INUMBER) {
for(i = 0; i < 1; i++) {
if(is_valid((esp+i))) {
arg_int[i] = esp + i;
}
else thread_exit();
}
lock_acquire(&lock_sys);
f->eax = syscall_inumber(*arg_int[0]);
lock_release(&lock_sys);
}
else
thread_exit();
}
