[Xenomai-git] Philippe Gerum : native, psos+, vxworks: prevent optimizer to trash inline syscall args

[GIT version control]

Module: xenomai-head
Branch: master
Commit: 2eee833ac1d1a25a9b347894a71a893d58d7740a
URL:    
http://git.xenomai.org/?p=xenomai-head.git;a=commit;h=2eee833ac1d1a25a9b347894a71a893d58d7740a

Author: Philippe Gerum <r...@xenomai.org>
Date:   Mon Sep  5 18:47:41 2011 +0200

native, psos+, vxworks: prevent optimizer to trash inline syscall args

---

 src/skins/native/task.c     |    4 +++-
 src/skins/psos+/task.c      |    3 ++-
 src/skins/vxworks/taskLib.c |    3 ++-
 3 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/src/skins/native/task.c b/src/skins/native/task.c
index 5e7be9f..053048f 100644
--- a/src/skins/native/task.c
+++ b/src/skins/native/task.c
@@ -56,6 +56,7 @@ struct rt_task_iargs {
 static void *rt_task_trampoline(void *cookie)
 {
        struct rt_task_iargs *iargs = (struct rt_task_iargs *)cookie;
+       volatile pthread_t tid = pthread_self();
        void (*entry) (void *cookie);
        unsigned long mode_offset;
        struct rt_arg_bulk bulk;
@@ -79,11 +80,12 @@ static void *rt_task_trampoline(void *cookie)
        bulk.a2 = (u_long)iargs->name;
        bulk.a3 = (u_long)iargs->prio;
        bulk.a4 = (u_long)iargs->mode;
-       bulk.a5 = (u_long)pthread_self();
+       bulk.a5 = (u_long)tid;
        /* Signal allocation failures by setting bulk.a6 to 0, they will be
           propagated to the thread waiting in xn_sys_completion. */
        bulk.a6 = !self ? 0UL : (u_long)&mode_offset;
 
+       asm volatile("nop;nop;nop");
        err = XENOMAI_SKINCALL2(__native_muxid,
                                __native_task_create, &bulk,
                                iargs->completionp);
diff --git a/src/skins/psos+/task.c b/src/skins/psos+/task.c
index 40d0f04..a43f7fb 100644
--- a/src/skins/psos+/task.c
+++ b/src/skins/psos+/task.c
@@ -62,6 +62,7 @@ static void *psos_task_trampoline(void *cookie)
 {
        struct psos_task_iargs *iargs = (struct psos_task_iargs *)cookie;
        void (*entry)(u_long, u_long, u_long, u_long);
+       volatile pthread_t tid = pthread_self();
        struct psos_arg_bulk bulk;
        unsigned long mode_offset;
        u_long handle, targs[4];
@@ -74,7 +75,7 @@ static void *psos_task_trampoline(void *cookie)
        bulk.a2 = (u_long)iargs->prio;
        bulk.a3 = (u_long)iargs->flags;
        bulk.a4 = (u_long)&mode_offset;
-       bulk.a5 = (u_long)pthread_self();
+       bulk.a5 = (u_long)tid;
 
        if (!bulk.a4) {
                err = -ENOMEM;
diff --git a/src/skins/vxworks/taskLib.c b/src/skins/vxworks/taskLib.c
index f751788..7d318ae 100644
--- a/src/skins/vxworks/taskLib.c
+++ b/src/skins/vxworks/taskLib.c
@@ -86,6 +86,7 @@ static void *wind_task_trampoline(void *cookie)
 {
        struct wind_task_iargs *iargs =
            (struct wind_task_iargs *)cookie, _iargs;
+       volatile pthread_t tid = pthread_self();
        struct wind_arg_bulk bulk;
        unsigned long mode_offset;
        WIND_TCB *pTcb;
@@ -101,7 +102,7 @@ static void *wind_task_trampoline(void *cookie)
        bulk.a1 = (u_long)iargs->name;
        bulk.a2 = (u_long)iargs->prio;
        bulk.a3 = (u_long)iargs->flags;
-       bulk.a4 = (u_long)pthread_self();
+       bulk.a4 = (u_long)tid;
        bulk.a5 = (u_long)&mode_offset;
        pTcb = iargs->pTcb;
 


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