Module: xenomai-head
Branch: master
Commit: 4de7606ff498370b9359b58fd82a794f2fdc2c46
URL:
http://git.xenomai.org/?p=xenomai-head.git;a=commit;h=4de7606ff498370b9359b58fd82a794f2fdc2c46
Author: Jan Kiszka <jan.kis...@siemens.com>
Date: Mon Jul 18 18:57:12 2011 +0200
nucleus: Restore u_mode after failed hardening
When we abort xnshadow_harden due to a pending signal, restore u_mode in
case XNRELAX was already cleared. This will deliver the right state to
user space while it runs the signal handler.
Signed-off-by: Jan Kiszka <jan.kis...@siemens.com>
---
ksrc/nucleus/shadow.c | 13 ++++++++++---
1 files changed, 10 insertions(+), 3 deletions(-)
diff --git a/ksrc/nucleus/shadow.c b/ksrc/nucleus/shadow.c
index fe7e504..fc0af8e 100644
--- a/ksrc/nucleus/shadow.c
+++ b/ksrc/nucleus/shadow.c
@@ -940,7 +940,7 @@ int xnshadow_harden(void)
struct task_struct *this_task = current;
struct xnthread *thread;
struct xnsched *sched;
- int cpu;
+ int cpu, err;
redo:
thread = xnshadow_thread(this_task);
@@ -951,8 +951,10 @@ redo:
sched = xnpod_sched_slot(cpu);
/* Grab the request token. */
- if (down_interruptible(&sched->gksync))
- return -ERESTARTSYS;
+ if (down_interruptible(&sched->gksync)) {
+ err = -ERESTARTSYS;
+ goto failed;
+ }
if (thread->u_mode)
*(thread->u_mode) = thread->state & ~XNRELAX;
@@ -1065,6 +1067,11 @@ redo:
xnsched_resched_after_unlocked_switch();
return 0;
+
+ failed:
+ if (thread->u_mode)
+ *(thread->u_mode) = thread->state;
+ return err;
}
EXPORT_SYMBOL_GPL(xnshadow_harden);
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