diff options
| author | Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | 2011-03-16 19:04:48 -0400 |
|---|---|---|
| committer | Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> | 2011-03-16 19:04:48 -0400 |
| commit | f51f3f6fc6508a550defd24ae48ed6b1bcabb074 (patch) | |
| tree | e5dff844458f64218458e401023f88111b5e94ba /arch | |
| parent | 59a0ad3a6cde75828a1787fc778c697913db2995 (diff) | |
lttng-instrumentation/lttng-kernel-trace-thread-flag-ia64
LTTng Kernel Trace Thread Flag ia64
Add a thread flag to activate system-wide syscall tracing.
FIXME : Masami reported that enabling the KERNEL_TRACE thread flag did disable
the gate page for gettimeofday, falling back on a standard system call. More
work would be needed in this area and I don't have the architecture available.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
CC: Masami Hiramatsu <mhiramat@redhat.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/ia64/include/asm/thread_info.h | 10 | ||||
| -rw-r--r-- | arch/ia64/kernel/entry.S | 6 |
2 files changed, 11 insertions, 5 deletions
diff --git a/arch/ia64/include/asm/thread_info.h b/arch/ia64/include/asm/thread_info.h index b6a5ba2aca3..3206bb5575b 100644 --- a/arch/ia64/include/asm/thread_info.h +++ b/arch/ia64/include/asm/thread_info.h @@ -100,6 +100,7 @@ struct thread_info { #define TIF_SYSCALL_TRACE 2 /* syscall trace active */ #define TIF_SYSCALL_AUDIT 3 /* syscall auditing active */ #define TIF_SINGLESTEP 4 /* restore singlestep on return to user mode */ +#define TIF_KERNEL_TRACE 5 /* kernel trace active */ #define TIF_NOTIFY_RESUME 6 /* resumption notification requested */ #define TIF_POLLING_NRFLAG 16 /* true if poll_idle() is polling TIF_NEED_RESCHED */ #define TIF_MEMDIE 17 /* is terminating due to OOM killer */ @@ -111,7 +112,9 @@ struct thread_info { #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE) #define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT) #define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP) -#define _TIF_SYSCALL_TRACEAUDIT (_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SINGLESTEP) +#define _TIF_KERNEL_TRACE (1 << TIF_KERNEL_TRACE) +#define _TIF_SYSCALL_TRACEAUDIT (_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|\ + _TIF_SINGLESTEP|_TIF_KERNEL_TRACE) #define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME) #define _TIF_SIGPENDING (1 << TIF_SIGPENDING) #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED) @@ -124,8 +127,9 @@ struct thread_info { /* "work to do on user-return" bits */ #define TIF_ALLWORK_MASK (_TIF_SIGPENDING|_TIF_NOTIFY_RESUME|_TIF_SYSCALL_AUDIT|\ _TIF_NEED_RESCHED|_TIF_SYSCALL_TRACE) -/* like TIF_ALLWORK_BITS but sans TIF_SYSCALL_TRACE or TIF_SYSCALL_AUDIT */ -#define TIF_WORK_MASK (TIF_ALLWORK_MASK&~(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT)) +/* like TIF_ALLWORK_BITS but sans TIF_SYSCALL_TRACE, TIF_KERNEL_TRACE or TIF_SYSCALL_AUDIT */ +#define TIF_WORK_MASK (TIF_ALLWORK_MASK&~(_TIF_SYSCALL_TRACE|_TIF_KERNEL_TRACE|\ + _TIF_SYSCALL_AUDIT)) #define TS_POLLING 1 /* true if in idle loop and not sleeping */ #define TS_RESTORE_SIGMASK 2 /* restore signal mask in do_signal() */ diff --git a/arch/ia64/kernel/entry.S b/arch/ia64/kernel/entry.S index 244704a174d..56c4de30197 100644 --- a/arch/ia64/kernel/entry.S +++ b/arch/ia64/kernel/entry.S @@ -620,9 +620,11 @@ GLOBAL_ENTRY(ia64_ret_from_clone) ;; ld4 r2=[r2] ;; + movl r8=_TIF_SYSCALL_TRACEAUDIT + ;; // added stop bits to prevent r8 dependency + and r2=r8,r2 mov r8=0 - and r2=_TIF_SYSCALL_TRACEAUDIT,r2 - ;; + ;; // added stop bits to prevent r2 dependency cmp.ne p6,p0=r2,r0 (p6) br.cond.spnt .strace_check_retval ;; // added stop bits to prevent r8 dependency |