Changeset 91b60499 in mainline for kernel/generic/include/proc/task.h

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:

• kernel/generic/include/proc/task.h (modified) (4 diffs)

kernel/generic/include/proc/task.h

@@ -60 +60 @@
 #include <abi/sysinfo.h>
 #include <arch.h>
+#include <cap/cap.h>
 
 #define TASK                 THE->task
@@ -65 +66 @@
 
 struct thread;
+struct cap;
 
 /** Task structure. */
@@ -95 +97 @@
         /** Task permissions. */
         perm_t perms;
+
+        /** Capabilities */
+        cap_info_t *cap_info;
         
         /* IPC stuff */
@@ -100 +105 @@
         /** Receiving communication endpoint */
         answerbox_t answerbox;
-
-        /** Sending communication endpoints */
-        phone_t phones[IPC_MAX_PHONES];
 
         /** Spinlock protecting the active_calls list. */