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kernel: provide more info on object perm checks

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We now show the caller's thread ID and dump out the permissions array
for the object that failed the check.

Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
This commit is contained in:
Andrew Boie 2017-10-08 12:50:59 -07:00 • committed by Andrew Boie
commit 1d483bb4a3
1 changed files with 7 additions and 3 deletions
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10
kernel/userspace.c
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@ -113,7 +113,6 @@ static void set_thread_perms(struct _k_object *ko, struct k_thread *thread)
}
}
static int test_thread_perms(struct _k_object *ko)
{
if (_current->base.perm_index < 8 * CONFIG_MAX_THREAD_BYTES) {
@ -202,8 +201,13 @@ int _k_object_validate(void *obj, enum k_objects otype, int init)
*/
if (ko->flags & K_OBJ_FLAG_INITIALIZED && _is_thread_user() &&
!test_thread_perms(ko)) {
printk("thread %p does not have permission on %s %p\n",
_current, otype_to_str(otype), obj);
printk("thread %p (%d) does not have permission on %s %p [",
_current, _current->base.perm_index, otype_to_str(otype),
obj);
for (int i = CONFIG_MAX_THREAD_BYTES - 1; i >= 0; i--) {
printk("%02x", ko->perms[i]);
}
printk("]\n");
return -EPERM;
}