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Date:	Mon, 14 Jul 2014 12:14:57 +0200
From:	"Helge Deller" <deller@....de>
To:	"Richard Weinberger" <richard@....at>
Cc:	linux-arch@...r.kernel.org, linux-kernel@...r.kernel.org,
	"James E.J. Bottomley" <jejb@...isc-linux.org>
Subject: Aw: [PATCH 15/43] parisc: Use get_signal() signal_setup_done()

Hi Richard,

nice work!
I pulled your tree and tested your patch series on parisc.
Everything seems OK.

Regarding the changes to the parisc arch, you can add my

Acked-by: Helge Deller <deller@....de>

Thanks!
Helge

> Betreff: [PATCH 15/43] parisc: Use get_signal() signal_setup_done()
>
> Use the more generic functions get_signal() signal_setup_done()
> for signal delivery.
> 
> Signed-off-by: Richard Weinberger <richard@....at>
> ---
>  arch/parisc/kernel/signal.c | 58 +++++++++++++++++++--------------------------
>  1 file changed, 24 insertions(+), 34 deletions(-)
> 
> diff --git a/arch/parisc/kernel/signal.c b/arch/parisc/kernel/signal.c
> index 1cba8f2..012d4fa 100644
> --- a/arch/parisc/kernel/signal.c
> +++ b/arch/parisc/kernel/signal.c
> @@ -227,8 +227,8 @@ setup_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs, int in_sysc
>  }
>  
>  static long
> -setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
> -	       sigset_t *set, struct pt_regs *regs, int in_syscall)
> +setup_rt_frame(struct ksignal *ksig, sigset_t *set, struct pt_regs *regs,
> +	       int in_syscall)
>  {
>  	struct rt_sigframe __user *frame;
>  	unsigned long rp, usp;
> @@ -241,10 +241,10 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
>  	
>  	usp = (regs->gr[30] & ~(0x01UL));
>  	/*FIXME: frame_size parameter is unused, remove it. */
> -	frame = get_sigframe(ka, usp, sizeof(*frame));
> +	frame = get_sigframe(&ksig->ka, usp, sizeof(*frame));
>  
>  	DBG(1,"SETUP_RT_FRAME: START\n");
> -	DBG(1,"setup_rt_frame: frame %p info %p\n", frame, info);
> +	DBG(1,"setup_rt_frame: frame %p info %p\n", frame, ksig->info);
>  
>  	
>  #ifdef CONFIG_64BIT
> @@ -253,7 +253,7 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
>  	
>  	if (is_compat_task()) {
>  		DBG(1,"setup_rt_frame: frame->info = 0x%p\n", &compat_frame->info);
> -		err |= copy_siginfo_to_user32(&compat_frame->info, info);
> +		err |= copy_siginfo_to_user32(&compat_frame->info, &ksig->info);
>  		err |= __compat_save_altstack( &compat_frame->uc.uc_stack, regs->gr[30]);
>  		DBG(1,"setup_rt_frame: frame->uc = 0x%p\n", &compat_frame->uc);
>  		DBG(1,"setup_rt_frame: frame->uc.uc_mcontext = 0x%p\n", &compat_frame->uc.uc_mcontext);
> @@ -265,7 +265,7 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
>  #endif
>  	{	
>  		DBG(1,"setup_rt_frame: frame->info = 0x%p\n", &frame->info);
> -		err |= copy_siginfo_to_user(&frame->info, info);
> +		err |= copy_siginfo_to_user(&frame->info, &ksig->info);
>  		err |= __save_altstack(&frame->uc.uc_stack, regs->gr[30]);
>  		DBG(1,"setup_rt_frame: frame->uc = 0x%p\n", &frame->uc);
>  		DBG(1,"setup_rt_frame: frame->uc.uc_mcontext = 0x%p\n", &frame->uc.uc_mcontext);
> @@ -275,7 +275,7 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
>  	}
>  	
>  	if (err)
> -		goto give_sigsegv;
> +		return -EFAULT;
>  
>  	/* Set up to return from userspace.  If provided, use a stub
>  	   already in userspace. The first words of tramp are used to
> @@ -312,9 +312,9 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
>  	rp = (unsigned long) &frame->tramp[SIGRESTARTBLOCK_TRAMP];
>  
>  	if (err)
> -		goto give_sigsegv;
> +		return -EFAULT;
>  
> -	haddr = A(ka->sa.sa_handler);
> +	haddr = A(ksig->ka.sa.sa_handler);
>  	/* The sa_handler may be a pointer to a function descriptor */
>  #ifdef CONFIG_64BIT
>  	if (is_compat_task()) {
> @@ -326,7 +326,7 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
>  			err = __copy_from_user(&fdesc, ufdesc, sizeof(fdesc));
>  
>  			if (err)
> -				goto give_sigsegv;
> +				return -EFAULT;
>  
>  			haddr = fdesc.addr;
>  			regs->gr[19] = fdesc.gp;
> @@ -339,7 +339,7 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
>  		err = __copy_from_user(&fdesc, ufdesc, sizeof(fdesc));
>  		
>  		if (err)
> -			goto give_sigsegv;
> +			return -EFAULT;
>  		
>  		haddr = fdesc.addr;
>  		regs->gr[19] = fdesc.gp;
> @@ -386,7 +386,7 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
>  	}
>  
>  	regs->gr[2]  = rp;                /* userland return pointer */
> -	regs->gr[26] = sig;               /* signal number */
> +	regs->gr[26] = ksig->sig;               /* signal number */
>  	
>  #ifdef CONFIG_64BIT
>  	if (is_compat_task()) {
> @@ -410,11 +410,6 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
>  	       current->comm, current->pid, frame, regs->gr[30],
>  	       regs->iaoq[0], regs->iaoq[1], rp);
>  
> -	return 1;
> -
> -give_sigsegv:
> -	DBG(1,"setup_rt_frame: sending SIGSEGV\n");
> -	force_sigsegv(sig, current);
>  	return 0;
>  }
>  
> @@ -423,20 +418,19 @@ give_sigsegv:
>   */	
>  
>  static void
> -handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka,
> -		struct pt_regs *regs, int in_syscall)
> +handle_signal(struct ksignal *ksig, struct pt_regs *regs, int in_syscall)
>  {
> +	int ret;
>  	sigset_t *oldset = sigmask_to_save();
> +
>  	DBG(1,"handle_signal: sig=%ld, ka=%p, info=%p, oldset=%p, regs=%p\n",
> -	       sig, ka, info, oldset, regs);
> +	       ksig->sig, ksig->ka, ksig->info, oldset, regs);
>  	
>  	/* Set up the stack frame */
> -	if (!setup_rt_frame(sig, ka, info, oldset, regs, in_syscall))
> -		return;
> +	ret = setup_rt_frame(ksig, oldset, regs, in_syscall);
>  
> -	signal_delivered(sig, info, ka, regs, 
> -		test_thread_flag(TIF_SINGLESTEP) ||
> -		test_thread_flag(TIF_BLOCKSTEP));
> +	signal_setup_done(ret, ksig, test_thread_flag(TIF_SINGLESTEP) ||
> +			  test_thread_flag(TIF_BLOCKSTEP));
>  
>  	DBG(1,KERN_DEBUG "do_signal: Exit (success), regs->gr[28] = %ld\n",
>  		regs->gr[28]);
> @@ -544,22 +538,18 @@ insert_restart_trampoline(struct pt_regs *regs)
>  asmlinkage void
>  do_signal(struct pt_regs *regs, long in_syscall)
>  {
> -	siginfo_t info;
> -	struct k_sigaction ka;
> -	int signr;
> +	struct ksignal ksig;
>  
>  	DBG(1,"\ndo_signal: regs=0x%p, sr7 %#lx, in_syscall=%d\n",
>  	       regs, regs->sr[7], in_syscall);
>  
> -	signr = get_signal_to_deliver(&info, &ka, regs, NULL);
> -	DBG(3,"do_signal: signr = %d, regs->gr[28] = %ld\n", signr, regs->gr[28]); 
> -	
> -	if (signr > 0) {
> +	if (get_signal(&ksig)) {
> +		DBG(3,"do_signal: signr = %d, regs->gr[28] = %ld\n", signr, regs->gr[28]);
>  		/* Restart a system call if necessary. */
>  		if (in_syscall)
> -			syscall_restart(regs, &ka);
> +			syscall_restart(regs, &ksig.ka);
>  
> -		handle_signal(signr, &info, &ka, regs, in_syscall);
> +		handle_signal(&ksig, regs, in_syscall);
>  		return;
>  	}
>  
> -- 
> 2.0.1
> 
> 
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