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| author | David S. Miller <davem@davemloft.net> | 2008-07-27 03:38:53 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-07-27 17:33:37 -0700 |
| commit | 5a157d5bf8288eaa86ec269a966559594ddd542e (patch) | |
| tree | 0597106130ba8cb31878d13a03b32fb9d1dc8944 /arch/sparc | |
| parent | 1c133b4b3d58bf88293eeea0d9d090777333bf48 (diff) | |
| download | linux-5a157d5bf8288eaa86ec269a966559594ddd542e.tar.gz | |
sparc: Create and use TIF_NOTIFY_RESUME.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc')
| -rw-r--r-- | arch/sparc/include/asm/thread_info_32.h | 7 | ||||
| -rw-r--r-- | arch/sparc/kernel/rtrap.S | 5 | ||||
| -rw-r--r-- | arch/sparc/kernel/signal.c | 14 |
3 files changed, 22 insertions, 4 deletions
diff --git a/arch/sparc/include/asm/thread_info_32.h b/arch/sparc/include/asm/thread_info_32.h index 2cf9db044055..cbb892d0dff0 100644 --- a/arch/sparc/include/asm/thread_info_32.h +++ b/arch/sparc/include/asm/thread_info_32.h @@ -130,7 +130,7 @@ BTFIXUPDEF_CALL(void, free_thread_info, struct thread_info *) * thread information flag bit numbers */ #define TIF_SYSCALL_TRACE 0 /* syscall trace active */ -/* flag 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_RESTORE_SIGMASK 4 /* restore signal mask in do_signal() */ @@ -142,12 +142,17 @@ BTFIXUPDEF_CALL(void, free_thread_info, struct thread_info *) /* as above, but as bit values */ #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_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK) #define _TIF_USEDFPU (1<<TIF_USEDFPU) #define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG) +#define _TIF_DO_NOTIFY_RESUME_MASK (_TIF_NOTIFY_RESUME | \ + _TIF_SIGPENDING | \ + _TIF_RESTORE_SIGMASK) + #endif /* __KERNEL__ */ #endif /* _ASM_THREAD_INFO_H */ diff --git a/arch/sparc/kernel/rtrap.S b/arch/sparc/kernel/rtrap.S index 891f460b7b96..4da2e1f66290 100644 --- a/arch/sparc/kernel/rtrap.S +++ b/arch/sparc/kernel/rtrap.S @@ -69,12 +69,13 @@ ret_trap_lockless_ipi: ld [%curptr + TI_FLAGS], %g2 signal_p: - andcc %g2, (_TIF_SIGPENDING|_TIF_RESTORE_SIGMASK), %g0 + andcc %g2, _TIF_DO_NOTIFY_RESUME_MASK, %g0 bz,a ret_trap_continue ld [%sp + STACKFRAME_SZ + PT_PSR], %t_psr + mov %g2, %o2 mov %l5, %o1 - call do_signal + call do_notify_resume add %sp, STACKFRAME_SZ, %o0 ! pt_regs ptr /* Fall through. */ diff --git a/arch/sparc/kernel/signal.c b/arch/sparc/kernel/signal.c index 3fd1df9f9ba7..bee6ba34e021 100644 --- a/arch/sparc/kernel/signal.c +++ b/arch/sparc/kernel/signal.c @@ -18,6 +18,7 @@ #include <linux/smp.h> #include <linux/binfmts.h> /* do_coredum */ #include <linux/bitops.h> +#include <linux/tracehook.h> #include <asm/uaccess.h> #include <asm/ptrace.h> @@ -513,7 +514,7 @@ static inline void syscall_restart(unsigned long orig_i0, struct pt_regs *regs, * want to handle. Thus you cannot kill init even with a SIGKILL even by * mistake. */ -asmlinkage void do_signal(struct pt_regs * regs, unsigned long orig_i0) +static void do_signal(struct pt_regs *regs, unsigned long orig_i0) { struct k_sigaction ka; int restart_syscall; @@ -579,6 +580,17 @@ asmlinkage void do_signal(struct pt_regs * regs, unsigned long orig_i0) } } +void do_notify_resume(struct pt_regs *regs, unsigned long orig_i0, + unsigned long thread_info_flags) +{ + if (thread_info_flags & (_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK)) + do_signal(regs, orig_i0); + if (thread_info_flags & _TIF_NOTIFY_RESUME) { + clear_thread_flag(TIF_NOTIFY_RESUME); + tracehook_notify_resume(regs); + } +} + asmlinkage int do_sys_sigstack(struct sigstack __user *ssptr, struct sigstack __user *ossptr, unsigned long sp) |