diff options
| author | Roland McGrath <roland@redhat.com> | 2008-04-20 15:06:49 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-07-27 17:32:19 -0700 |
| commit | e35a8925e0e7af8b26161a2c161ea31be0296b80 (patch) | |
| tree | 708008d1494a91f76277f9140a219ac24e88e432 | |
| parent | badcbf0e8654c4a4ca51fe46c75a70376e83c1ef (diff) | |
sparc64: tracehook: TIF_NOTIFY_RESUME
This adds TIF_NOTIFY_RESUME support for sparc64.
When set, we call tracehook_notify_resume() on the way to user mode.
Signed-off-by: Roland McGrath <roland@redhat.com>
| -rw-r--r-- | arch/sparc/include/asm/thread_info_64.h | 8 | ||||
| -rw-r--r-- | arch/sparc64/kernel/rtrap.S | 6 | ||||
| -rw-r--r-- | arch/sparc64/kernel/signal.c | 5 |
3 files changed, 13 insertions, 6 deletions
diff --git a/arch/sparc/include/asm/thread_info_64.h b/arch/sparc/include/asm/thread_info_64.h index 960969d5ad0..c0a737d7292 100644 --- a/arch/sparc/include/asm/thread_info_64.h +++ b/arch/sparc/include/asm/thread_info_64.h @@ -219,7 +219,7 @@ register struct thread_info *current_thread_info_reg asm("g6"); * nop */ #define TIF_SYSCALL_TRACE 0 /* syscall trace active */ -/* flags bit 1 is available */ +#define TIF_NOTIFY_RESUME 1 /* callback before returning to user */ #define TIF_SIGPENDING 2 /* signal pending */ #define TIF_NEED_RESCHED 3 /* rescheduling necessary */ #define TIF_PERFCTR 4 /* performance counters active */ @@ -239,6 +239,7 @@ register struct thread_info *current_thread_info_reg asm("g6"); #define TIF_POLLING_NRFLAG 14 #define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE) +#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME) #define _TIF_SIGPENDING (1<<TIF_SIGPENDING) #define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED) #define _TIF_PERFCTR (1<<TIF_PERFCTR) @@ -250,8 +251,9 @@ register struct thread_info *current_thread_info_reg asm("g6"); #define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG) #define _TIF_USER_WORK_MASK ((0xff << TI_FLAG_WSAVED_SHIFT) | \ - (_TIF_SIGPENDING | \ - _TIF_NEED_RESCHED | _TIF_PERFCTR)) + _TIF_DO_NOTIFY_RESUME_MASK | \ + _TIF_NEED_RESCHED | _TIF_PERFCTR) +#define _TIF_DO_NOTIFY_RESUME_MASK (_TIF_NOTIFY_RESUME | _TIF_SIGPENDING) /* * Thread-synchronous status. diff --git a/arch/sparc64/kernel/rtrap.S b/arch/sparc64/kernel/rtrap.S index c6fc695fe1f..97a993c1f7f 100644 --- a/arch/sparc64/kernel/rtrap.S +++ b/arch/sparc64/kernel/rtrap.S @@ -46,7 +46,7 @@ __handle_user_windows: wrpr %g0, RTRAP_PSTATE_IRQOFF, %pstate ldx [%g6 + TI_FLAGS], %l0 -1: andcc %l0, _TIF_SIGPENDING, %g0 +1: andcc %l0, _TIF_DO_NOTIFY_RESUME_MASK, %g0 be,pt %xcc, __handle_user_windows_continue nop mov %l5, %o1 @@ -86,7 +86,7 @@ __handle_perfctrs: wrpr %g0, RTRAP_PSTATE, %pstate wrpr %g0, RTRAP_PSTATE_IRQOFF, %pstate ldx [%g6 + TI_FLAGS], %l0 -1: andcc %l0, _TIF_SIGPENDING, %g0 +1: andcc %l0, _TIF_DO_NOTIFY_RESUME_MASK, %g0 be,pt %xcc, __handle_perfctrs_continue sethi %hi(TSTATE_PEF), %o0 @@ -195,7 +195,7 @@ __handle_preemption_continue: andcc %l1, %o0, %g0 andcc %l0, _TIF_NEED_RESCHED, %g0 bne,pn %xcc, __handle_preemption - andcc %l0, _TIF_SIGPENDING, %g0 + andcc %l0, _TIF_DO_NOTIFY_RESUME_MASK, %g0 bne,pn %xcc, __handle_signal __handle_signal_continue: ldub [%g6 + TI_WSAVED], %o2 diff --git a/arch/sparc64/kernel/signal.c b/arch/sparc64/kernel/signal.c index 9667e96fd51..9424fdab306 100644 --- a/arch/sparc64/kernel/signal.c +++ b/arch/sparc64/kernel/signal.c @@ -17,6 +17,7 @@ #include <linux/errno.h> #include <linux/wait.h> #include <linux/ptrace.h> +#include <linux/tracehook.h> #include <linux/unistd.h> #include <linux/mm.h> #include <linux/tty.h> @@ -605,4 +606,8 @@ void do_notify_resume(struct pt_regs *regs, unsigned long orig_i0, unsigned long { if (thread_info_flags & _TIF_SIGPENDING) do_signal(regs, orig_i0); + if (thread_info_flags & _TIF_NOTIFY_RESUME) { + clear_thread_flag(TIF_NOTIFY_RESUME); + tracehook_notify_resume(regs); + } } |