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Date: Mon, 21 Jul 2014 22:47:34 +0800
From: Lennox Wu <lennox.wu@...il.com>
To: Richard Weinberger <richard@...ma-star.at>
Cc: open list <linux-kernel@...r.kernel.org>,
linux-arch <linux-arch@...r.kernel.org>,
Liqin Chen <liqin.linux@...il.com>
Subject: Re: [PATCH 18/43] score: Use get_signal() signal_setup_done()
I am picking up some missed patches and merging them into our git
tree. If the patch is missed, we will merge it.
Best,
Lennox
2014-07-21 22:03 GMT+08:00 Richard Weinberger <richard@...ma-star.at>:
> From: Richard Weinberger <richard@....at>
>
> Use the more generic functions get_signal() signal_setup_done()
> for signal delivery.
>
> Acked-by: Lennox Wu <lennox.wu@...il.com>
> Signed-off-by: Richard Weinberger <richard@....at>
> ---
> arch/score/kernel/signal.c | 43 ++++++++++++++++++-------------------------
> 1 file changed, 18 insertions(+), 25 deletions(-)
>
> diff --git a/arch/score/kernel/signal.c b/arch/score/kernel/signal.c
> index a00fba3..1651807 100644
> --- a/arch/score/kernel/signal.c
> +++ b/arch/score/kernel/signal.c
> @@ -173,15 +173,15 @@ badframe:
> return 0;
> }
>
> -static int setup_rt_frame(struct k_sigaction *ka, struct pt_regs *regs,
> - int signr, sigset_t *set, siginfo_t *info)
> +static int setup_rt_frame(struct ksignal *ksig, struct pt_regs *regs,
> + sigset_t *set)
> {
> struct rt_sigframe __user *frame;
> int err = 0;
>
> - frame = get_sigframe(ka, regs, sizeof(*frame));
> + frame = get_sigframe(&ksig->ka, regs, sizeof(*frame));
> if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
> - goto give_sigsegv;
> + return -EFAULT;
>
> /*
> * Set up the return code ...
> @@ -194,7 +194,7 @@ static int setup_rt_frame(struct k_sigaction *ka, struct pt_regs *regs,
> err |= __put_user(0x80008002, frame->rs_code + 1);
> flush_cache_sigtramp((unsigned long) frame->rs_code);
>
> - err |= copy_siginfo_to_user(&frame->rs_info, info);
> + err |= copy_siginfo_to_user(&frame->rs_info, &ksig->info);
> err |= __put_user(0, &frame->rs_uc.uc_flags);
> err |= __put_user(NULL, &frame->rs_uc.uc_link);
> err |= __save_altstack(&frame->rs_uc.uc_stack, regs->regs[0]);
> @@ -202,26 +202,23 @@ static int setup_rt_frame(struct k_sigaction *ka, struct pt_regs *regs,
> err |= __copy_to_user(&frame->rs_uc.uc_sigmask, set, sizeof(*set));
>
> if (err)
> - goto give_sigsegv;
> + return -EFAULT;
>
> regs->regs[0] = (unsigned long) frame;
> regs->regs[3] = (unsigned long) frame->rs_code;
> - regs->regs[4] = signr;
> + regs->regs[4] = ksig->sig;
> regs->regs[5] = (unsigned long) &frame->rs_info;
> regs->regs[6] = (unsigned long) &frame->rs_uc;
> - regs->regs[29] = (unsigned long) ka->sa.sa_handler;
> - regs->cp0_epc = (unsigned long) ka->sa.sa_handler;
> + regs->regs[29] = (unsigned long) ksig->ka.sa.sa_handler;
> + regs->cp0_epc = (unsigned long) ksig->ka.sa.sa_handler;
>
> return 0;
> -
> -give_sigsegv:
> - force_sigsegv(signr, current);
> - return -EFAULT;
> }
>
> -static void handle_signal(unsigned long sig, siginfo_t *info,
> - struct k_sigaction *ka, struct pt_regs *regs)
> +static void handle_signal(struct ksignal *ksig, struct pt_regs *regs)
> {
> + int ret;
> +
> if (regs->is_syscall) {
> switch (regs->regs[4]) {
> case ERESTART_RESTARTBLOCK:
> @@ -229,7 +226,7 @@ static void handle_signal(unsigned long sig, siginfo_t *info,
> regs->regs[4] = EINTR;
> break;
> case ERESTARTSYS:
> - if (!(ka->sa.sa_flags & SA_RESTART)) {
> + if (!(ksig->ka.sa.sa_flags & SA_RESTART)) {
> regs->regs[4] = EINTR;
> break;
> }
> @@ -245,17 +242,14 @@ static void handle_signal(unsigned long sig, siginfo_t *info,
> /*
> * Set up the stack frame
> */
> - if (setup_rt_frame(ka, regs, sig, sigmask_to_save(), info) < 0)
> - return;
> + ret = setup_rt_frame(ksig, regs, sigmask_to_save());
>
> - signal_delivered(sig, info, ka, regs, 0);
> + signal_setup_done(ret, ksig, 0);
> }
>
> static void do_signal(struct pt_regs *regs)
> {
> - struct k_sigaction ka;
> - siginfo_t info;
> - int signr;
> + struct ksignal ksig;
>
> /*
> * We want the common case to go fast, which is why we may in certain
> @@ -265,10 +259,9 @@ static void do_signal(struct pt_regs *regs)
> if (!user_mode(regs))
> return;
>
> - signr = get_signal_to_deliver(&info, &ka, regs, NULL);
> - if (signr > 0) {
> + if (get_signal(&ksig)) {
> /* Actually deliver the signal. */
> - handle_signal(signr, &info, &ka, regs);
> + handle_signal(&ksig, regs);
> return;
> }
>
> --
> 1.8.4.5
>
--
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