/*
* child process'in bitmesini bekle ve child process idsini dondur.
* child process yoksa -1 dondur.
*/
SYSCALL_DEFINE1(wait, int*, state) {
// FIXME: bunu yapan fonksiyon var ...
if ( task_curr->pgdir.verify_user_addr(state, 4, PTE_U) < 0 ) {
print_warning(">> wait not verified: 0x%08x - 0x%08x\n", state, state+1);
do_exit(111);
}
state = (int*)uaddr2kaddr((uint32_t)state);
pushcli();
if (task_curr->childs.size() == 0) {
popif();
return set_return(tf, -1);
}
/* cagriyi yapan taski runnable_list'den cikar */
remove_from_runnable_list(task_curr);
task_curr->state = Task::State_interruptible;
task_curr->waiting_child = 1;
popif();
schedule();
task_curr->waiting_child = 0;
Task *t = task_curr->wait_notify_next;
ASSERT(t);
task_curr->wait_notify_next = t->wait_notify_next;
/* return ve state degiskenlerini ata */
*state = t->exit_code;
return set_return(task_curr->registers(), t->id);
}
SYSCALL_DEFINE1(close, unsigned int, fd) {
pushcli();
if (task_curr->fs.files[fd] == NULL) {
popif();
return SYSCALL_RETURN(-1);
}
file_close(task_curr->fs.files[fd]);
task_curr->fs.files[fd] = NULL;
popif();
return SYSCALL_RETURN(0);
}
asmlink void do_exit(int code) {
pushcli();
if (task_curr->id == 1)
PANIC(">> exit task 1");
remove_from_runnable_list(task_curr);
task_curr->state = Task::State_zombie;
task_zombie_list.push_back(&task_curr->list_node);
task_free(task_curr);
task_curr->time_end = jiffies;
task_curr->exit_code = code;
// FIXME: ???
if (task_curr->exit_signal == 0)
task_curr->exit_signal = SIGCHLD;
notify_parent(task_curr);
print_info(">> [%d] exit OK\n", task_curr->id);
popif();
schedule();
PANIC("do_exit return");
}
SYSCALL_DEFINE2(kill, int, pid, int, sig) {
pushcli();
Task *t = task_id_ht.get(pid);
popif();
if (t == NULL)
return SYSCALL_RETURN(-1);
send_signal(sig, t);
return SYSCALL_RETURN(0);
}
int getline(int listflag)
/*
* Read in a line, preprocess it, and dump it to the list and preproc files
* Also strip comments and alter trigraphs
*/
{
int rv, rvc, prepping, temp;
static int inpreprocess;
char ibuf[4096], xbuf[4096], *xptr;
char *ptr = ibuf;
if (cantnewline)
{
return (0);
}
repeatit:
do
{
rv = FALSE;
prepping = FALSE;
rvc = 0;
// add:
while (rvc + 131 < 4096 && !rv)
{
++lineno;
++errlineno;
rv = getstring(ibuf + rvc, 4096 - rvc, inputFile);
if (rv)
{
break;
}
rvc = strlen(ibuf);
if (ibuf[rvc - 1] != '\n')
{
ibuf[rvc++] = '\n';
ibuf[rvc] = 0;
}
rvc -= 2;
while (ibuf[rvc] == ' ')
rvc--;
// if (ibuf[rvc] != '\\')
break;
}
if (rvc)
rv = FALSE;
if (rv)
{
if (ifs)
generror(ERR_PREPROCMATCH, 0);
if (commentlevel)
generror(ERR_COMMENTMATCH, 0);
if (incldepth > 0)
{
if (inSymFile && !strcmp(infile, rcIdFile))
inSymFile = FALSE;
fclose(inputFile);
inputFile = inclfile[--incldepth];
lineno = inclline[incldepth];
inhfile = inclhfile[incldepth];
infile = inclfname[incldepth];
free(inputBuffer);
inputBuffer = inclInputBuffer[incldepth];
inputLen = inclInputLen[incldepth];
ibufPtr = inclibufPtr[incldepth];
errlineno = lineno;
errfile = infile;
ifs = ifshold[incldepth];
commentlevel = 0;
popif();
goto repeatit;
}
}
if (rv)
return 1;
lptr = inputline;
ptr = ibuf;
xptr = xbuf;
while ((temp = *ptr++) != 0)
{
*lptr++ = (unsigned char)temp;
*xptr++ = (unsigned char)temp;
}
*lptr = 0;
*xptr = 0;
stripcomment(inputline);
lptr = inputline;
while (iswhitespacechar(*lptr))
lptr++;
CacheLine((WCHAR *)lptr, xbuf);
if (lptr[0] == '#')
{
inpreprocess++;
listflag = preprocess();
inpreprocess--;
prepping = TRUE;
lastst = eol;
}
if (incldepth)
lastst = eol;
}
while (ifskip || prepping || (inhfile && !inpreprocess))
;
rvc = strlen(ibuf);
/*
if (defcheck(inputline) == - 10 && rvc + 131 < 4096)
{
if (ibuf[rvc - 1] == '\n')
ibuf[rvc - 1] = ' ';
goto add;
}
*/
return 0;
}
// TODO: fork kurallari duzenlenmeli (neler kopyalanacak, neler kopyalanmayacak?)
int do_fork() {
CLOBBERED_REGISTERS_ALL();
/* debug only */
uint32_t mem_before_setup_vm = 0;
uint32_t mem_before_copy_pages = 0;
uint32_t mem_before_kernel_stack = 0;
/* */
int r;
Task *t;
uint32_t eip;
int e = 0; // error (bad_fork_* icin)
pushcli();
// ASSERT_int_disable();
t = (Task*)kmalloc(sizeof(Task));
if (!t)
goto bad_fork_task_alloc;
memcpy(t, task_curr, sizeof(Task));
t->init();
t->parent = task_curr;
t->state = Task::State_not_runnable;
/* -- */
mem_before_setup_vm = mem_free();
r = task_setup_vm(t, &task_curr->pgdir);
if (r < 0)
goto bad_fork_setup_vm;
/* user adres uzayini kopyala */
mem_before_copy_pages = mem_free();
r = t->pgdir.copy_pages(&task_curr->pgdir, MMAP_USER_BASE,
MMAP_USER_SHARED_MEM_BASE);
if (r < 0)
goto bad_fork_copy_vm_user;
/* shared memory kismini kopyalama, shm_fork fonksiyonu kopyalayacak */
r = t->pgdir.copy_pages(&task_curr->pgdir, MMAP_USER_SHARED_MEM_TOP,
MMAP_USER_TOP);
if (r < 0)
goto bad_fork_copy_vm_user;
t->pgdir.count_program = task_curr->pgdir.count_program;
t->pgdir.count_stack = task_curr->pgdir.count_stack;
t->pgdir.start_brk = task_curr->pgdir.start_brk;
t->pgdir.end_brk = task_curr->pgdir.end_brk;
/* */
/* ipc veriyapilari icin, ipc_fork */
r = ipc_fork(t);
if (r < 0)
goto bad_fork_ipc;
r = fs_fork(t);
if (r < 0)
goto bad_fork_fs;
/* kernel stackini kopyala */
mem_before_kernel_stack = mem_free();
r = t->pgdir.copy_pages(&task_curr->pgdir, MMAP_KERNEL_STACK_BASE, MMAP_KERNEL_STACK_TOP);
if (r < 0)
goto bad_fork_copy_kernel_stack;
/* burasi 2 kere calisiyor */
eip = read_eip();
if (eip == 1) /* child process'de popif yapilmamali */
return 0;
/* child prosesin register bilgileri */
t->k_eip = eip;
read_reg(%esp, t->k_esp);
read_reg(%ebp, t->k_ebp);
/* child prosesin baslangic zamani */
t->time_start = jiffies;
/* child listesine ekle */
ASSERT( task_curr->childs.push_back(&t->childlist_node) );
/* process id ata ve runnable listesine ekle */
set_task_id(t);
add_to_runnable_list(t);
popif();
return t->id;
bad_fork_copy_kernel_stack:
if (e++ == 0)
print_warning("!! bad_fork_copy_kernel_stack\n");
task_free_kernel_stack(t);
ASSERT(mem_free() == mem_before_kernel_stack);
bad_fork_fs:
// TODO: --
bad_fork_ipc:
// TODO: --
bad_fork_copy_vm_user:
if (e++ == 0)
print_warning("!! bad_fork_copy_vm_user\n");
task_free_vm_user(t);
ASSERT(mem_free() == mem_before_copy_pages);
bad_fork_setup_vm:
if (e++ == 0)
print_warning("!! bad_fork_setup_vm\n");
task_delete_vm(t);
ASSERT(mem_free() == mem_before_setup_vm);
kfree(t);
t = NULL;
bad_fork_task_alloc:
if (e++ == 0)
print_warning("!! bad_fork_task_alloc\n");
ASSERT(t == NULL);
popif();
return -1;
}