Changeset 91b60499 in mainline for uspace/lib/c/generic/ddi.c

Timestamp:

2017-09-30T06:29:42Z (7 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

300f4c4

Parents:

d076f16 (diff), 6636fb19 (diff)
Note: this is a merge changeset, the changes displayed below correspond to the merge itself.
Use the (diff) links above to see all the changes relative to each parent.

Message:

Merge support for capabilities from lp:~jakub/helenos/caps

This commit introduces capabilities as task-local names for references to kernel
objects. Kernel objects are reference-counted wrappers for a select group of
objects allocated in and by the kernel that can be made accessible to userspace
in a controlled way via integer handles.

So far, a kernel object encapsulates either an irq_t or a phone_t.

Support for the former lead to the removal of kernel-assigned devnos and
unsecure deregistration of IRQs in which a random task was able to unregister
some other task's IRQ.

File:

• uspace/lib/c/generic/ddi.c (modified) (1 diff)

uspace/lib/c/generic/ddi.c

@@ -50 +50 @@
 #include "private/libc.h"
 
-
-/** Return unique device number.
- *
- * @return New unique device number.
- *
- */
-int device_assign_devno(void)
-{
-        return __SYSCALL0(SYS_DEVICE_ASSIGN_DEVNO);
-}
 
 /** Map a piece of physical memory to task.