int stack_star_glob_match(struct estack *stack, int top, const char *cmp_type)
{
bool has_user = false;
- mm_segment_t old_fs;
int result;
struct estack_entry *pattern_reg;
struct estack_entry *candidate_reg;
+ /* Disable the page fault handler when reading from userspace. */
if (estack_bx(stack, top)->u.s.user
|| estack_ax(stack, top)->u.s.user) {
has_user = true;
- old_fs = get_fs();
- set_fs(KERNEL_DS);
pagefault_disable();
}
/* Perform the match operation. */
result = !strutils_star_glob_match_char_cb(get_char_at_cb,
pattern_reg, get_char_at_cb, candidate_reg);
- if (has_user) {
+ if (has_user)
pagefault_enable();
- set_fs(old_fs);
- }
return result;
}
{
size_t offset_bx = 0, offset_ax = 0;
int diff, has_user = 0;
- mm_segment_t old_fs;
if (estack_bx(stack, top)->u.s.user
|| estack_ax(stack, top)->u.s.user) {
has_user = 1;
- old_fs = get_fs();
- set_fs(KERNEL_DS);
pagefault_disable();
}
offset_bx++;
offset_ax++;
}
- if (has_user) {
+ if (has_user)
pagefault_enable();
- set_fs(old_fs);
- }
+
return diff;
}