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Fixed error escalation in thread_create() and its function calls.

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This commit is contained in:
Bahadir Balban
2009-05-01 22:39:31 +03:00
parent 952285d756
commit 97bfd3bb9b
4 changed files with 43 additions and 8 deletions
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21
src/api/thread.c
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@@ -265,23 +265,36 @@ int thread_setup_new_ids(struct task_ids *ids, unsigned int flags,
*/
int thread_create(struct task_ids *ids, unsigned int flags)
{
struct ktcb *task = 0, *new = (struct ktcb *)zalloc_page();
struct ktcb *task = 0;
struct ktcb *new = (struct ktcb *)zalloc_page();
unsigned int create_flags = flags & THREAD_CREATE_MASK;
if (!new)
return -ENOMEM;
/* Determine space allocation */
if (create_flags == THREAD_NEW_SPACE) {
/* Allocate new pgd and copy all kernel areas */
new->pgd = alloc_pgd();
if (!(new->pgd = alloc_pgd())) {
free_page(new);
return -ENOMEM;
}
copy_pgd_kern_all(new->pgd);
} else {
/* Existing space will be used, find it from all tasks */
list_for_each_entry(task, &global_task_list, task_list) {
/* Space ids match, can use existing space */
if (task->spid == ids->spid) {
if (flags == THREAD_SAME_SPACE)
if (flags == THREAD_SAME_SPACE) {
new->pgd = task->pgd;
else
} else {
new->pgd = copy_page_tables(task->pgd);
if (IS_ERR(new->pgd)) {
free_page(new);
return (int)new->pgd;
}
}
goto out;
}
}