On Monday 03 March 2014 05:26 AM, Richard Weinberger wrote:
> Use the more generic functions get_signal() signal_setup_done()
> for signal delivery.
>
> Signed-off-by: Richard Weinberger <richard@xxxxxx>
I gave the git branch some light testing and it works well.
Minor comment below, otherwise
Acked-by: Vineet Gupta <vgupta@xxxxxxxxxxxx>
P.S. Since this depends on translate_sig change, I can't possibly take it via ARC
tree.
Thx,
-Vineet
> ---
> arch/arc/kernel/signal.c | 39 +++++++++++++++------------------------
> 1 file changed, 15 insertions(+), 24 deletions(-)
>
> diff --git a/arch/arc/kernel/signal.c b/arch/arc/kernel/signal.c
> index 7e95e1a..c2031e2 100644
> --- a/arch/arc/kernel/signal.c
> +++ b/arch/arc/kernel/signal.c
> @@ -179,14 +179,13 @@ static inline int map_sig(int sig)
> }
>
> static int
> -setup_rt_frame(int signo, struct k_sigaction *ka, siginfo_t *info,
> - sigset_t *set, struct pt_regs *regs)
> +setup_rt_frame(struct ksignal *ksig, sigset_t *set, struct pt_regs *regs)
> {
> struct rt_sigframe __user *sf;
> unsigned int magic = 0;
> int err = 0;
>
> - sf = get_sigframe(ka, regs, sizeof(struct rt_sigframe));
> + sf = get_sigframe(&ksig->ka, regs, sizeof(struct rt_sigframe));
Can we pass ksig pointer kere (and a pairing change to get_sigframe). This will
reduce the code churn when we do the sigsp() change in there.
> if (!sf)
> return 1;
>
> @@ -205,8 +204,8 @@ setup_rt_frame(int signo, struct k_sigaction *ka, siginfo_t *info,
> * #2: struct siginfo
> * #3: struct ucontext (completely populated)
> */
> - if (unlikely(ka->sa.sa_flags & SA_SIGINFO)) {
> - err |= copy_siginfo_to_user(&sf->info, info);
> + if (unlikely(ksig->ka.sa.sa_flags & SA_SIGINFO)) {
> + err |= copy_siginfo_to_user(&sf->info, &ksig->info);
> err |= __put_user(0, &sf->uc.uc_flags);
> err |= __put_user(NULL, &sf->uc.uc_link);
> err |= __save_altstack(&sf->uc.uc_stack, regs->sp);
> @@ -227,16 +226,16 @@ setup_rt_frame(int signo, struct k_sigaction *ka, siginfo_t *info,
> return err;
>
> /* #1 arg to the user Signal handler */
> - regs->r0 = map_sig(signo);
> + regs->r0 = map_sig(ksig->sig);
>
> /* setup PC of user space signal handler */
> - regs->ret = (unsigned long)ka->sa.sa_handler;
> + regs->ret = (unsigned long)ksig->ka.sa.sa_handler;
>
> /*
> * handler returns using sigreturn stub provided already by userpsace
> */
> - BUG_ON(!(ka->sa.sa_flags & SA_RESTORER));
> - regs->blink = (unsigned long)ka->sa.sa_restorer;
> + BUG_ON(!(ksig->ka.sa.sa_flags & SA_RESTORER));
> + regs->blink = (unsigned long)ksig->ka.sa.sa_restorer;
>
> /* User Stack for signal handler will be above the frame just carved */
> regs->sp = (unsigned long)sf;
> @@ -298,38 +297,30 @@ static void arc_restart_syscall(struct k_sigaction *ka, struct pt_regs *regs)
> * OK, we're invoking a handler
> */
> static void
> -handle_signal(unsigned long sig, struct k_sigaction *ka, siginfo_t *info,
> - struct pt_regs *regs)
> +handle_signal(struct ksignal *ksig, struct pt_regs *regs)
> {
> sigset_t *oldset = sigmask_to_save();
> int ret;
>
> /* Set up the stack frame */
> - ret = setup_rt_frame(sig, ka, info, oldset, regs);
> + ret = setup_rt_frame(ksig, oldset, regs);
>
> - if (ret)
> - force_sigsegv(sig, current);
> - else
> - signal_delivered(sig, info, ka, regs, 0);
> + signal_setup_done(ret, ksig, 0);
> }
>
> void do_signal(struct pt_regs *regs)
> {
> - struct k_sigaction ka;
> - siginfo_t info;
> - int signr;
> + struct ksignal ksig;
> int restart_scall;
>
> - signr = get_signal_to_deliver(&info, &ka, regs, NULL);
> -
> restart_scall = in_syscall(regs) && syscall_restartable(regs);
>
> - if (signr > 0) {
> + if (get_signal(&ksig)) {
> if (restart_scall) {
> - arc_restart_syscall(&ka, regs);
> + arc_restart_syscall(&ksig.ka, regs);
> syscall_wont_restart(regs); /* No more restarts */
> }
> - handle_signal(signr, &ka, &info, regs);
> + handle_signal(&ksig, regs);
> return;
> }
>
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