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kernel: usercopy functions

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Matheus
2024-06-09 19:31:26 -03:00
parent 429f56aced
commit 50b4b45d00
53 changed files with 712 additions and 260 deletions
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kernel-src/sys/syscalls/setitimer.c
+18 -8
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@@ -45,11 +45,14 @@ syscallret_t syscall_getitimer(context_t *context, int which, itimerval_t *value
MUTEX_RELEASE(&_cpu()->thread->proc->timer.mutex);
value->interval.s = oldrepeat / 1000000;
value->interval.us = oldrepeat % 1000000;
value->value.s = oldremaining / 1000000;
value->value.us = oldremaining % 1000000;
ret.errno = 0;
itimerval_t tmp;
tmp.interval.s = oldrepeat / 1000000;
tmp.interval.us = oldrepeat % 1000000;
tmp.value.s = oldremaining / 1000000;
tmp.value.us = oldremaining % 1000000;
ret.errno = usercopy_touser(value, &tmp, sizeof(tmp));
ret.ret = ret.errno ? -1 : 0;
return ret;
}
@@ -67,8 +70,11 @@ syscallret_t syscall_setitimer(context_t *context, int which, itimerval_t *unew,
}
itimerval_t val = {0};
if (unew)
val = *unew;
if (unew) {
ret.errno = usercopy_fromuser(&val, unew, sizeof(val));
if (ret.errno)
return ret;
}
MUTEX_ACQUIRE(&_cpu()->thread->proc->timer.mutex, false);
uintmax_t oldremaining, oldrepeat;
@@ -84,13 +90,17 @@ syscallret_t syscall_setitimer(context_t *context, int which, itimerval_t *unew,
MUTEX_RELEASE(&_cpu()->thread->proc->timer.mutex);
ret.errno = 0;
if (uold) {
itimerval_t tmp;
uold->interval.s = oldrepeat / 1000000;
uold->interval.us = oldrepeat % 1000000;
uold->value.s = oldremaining / 1000000;
uold->value.us = oldremaining % 1000000;
ret.errno = usercopy_touser(uold, &tmp, sizeof(tmp));
}
ret.errno = 0;
ret.ret = ret.errno ? -1 : 0;
return ret;
}