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Commit 067bf2d4 authored by Richard Weinberger's avatar Richard Weinberger Committed by Richard Weinberger
Browse files

s390: Use get_signal() signal_setup_done() 



Use the more generic functions get_signal() signal_setup_done()
for signal delivery.

Signed-off-by: default avatarRichard Weinberger <richard@nod.at>
parent 129b69df

arch/s390/kernel/compat_signal.c

+35 −44
Original line number Diff line number Diff line
@@ -320,38 +320,39 @@ static inline int map_signal(int sig) 
		return sig;

}



static int setup_frame32(int sig, struct k_sigaction *ka,

			sigset_t *set, struct pt_regs * regs)

static int setup_frame32(struct ksignal *ksig, sigset_t *set,

			 struct pt_regs *regs)

{

	sigframe32 __user *frame = get_sigframe(ka, regs, sizeof(sigframe32));

	int sig = ksig->sig;

	sigframe32 __user *frame = get_sigframe(&ksig->ka, regs, sizeof(sigframe32));



	if (frame == (void __user *) -1UL)

		goto give_sigsegv;

		return -EFAULT;



	if (__copy_to_user(&frame->sc.oldmask, &set->sig, _SIGMASK_COPY_SIZE32))

		goto give_sigsegv;

		return -EFAULT;



	if (save_sigregs32(regs, &frame->sregs))

		goto give_sigsegv;

		return -EFAULT;

	if (save_sigregs_gprs_high(regs, frame->gprs_high))

		goto give_sigsegv;

		return -EFAULT;

	if (__put_user((unsigned long) &frame->sregs, &frame->sc.sregs))

		goto give_sigsegv;

		return -EFAULT;



	/* Set up to return from userspace.  If provided, use a stub

	   already in userspace.  */

	if (ka->sa.sa_flags & SA_RESTORER) {

		regs->gprs[14] = (__u64 __force) ka->sa.sa_restorer | PSW32_ADDR_AMODE;

	if (ksig->ka.sa.sa_flags & SA_RESTORER) {

		regs->gprs[14] = (__u64 __force) ksig->ka.sa.sa_restorer | PSW32_ADDR_AMODE;

	} else {

		regs->gprs[14] = (__u64 __force) frame->retcode | PSW32_ADDR_AMODE;

		if (__put_user(S390_SYSCALL_OPCODE | __NR_sigreturn,

			       (u16 __force __user *)(frame->retcode)))

			goto give_sigsegv;

			return -EFAULT;

        }



	/* Set up backchain. */

	if (__put_user(regs->gprs[15], (unsigned int __user *) frame))

		goto give_sigsegv;

		return -EFAULT;



	/* Set up registers for signal handler */

	regs->gprs[15] = (__force __u64) frame;
@@ -359,7 +360,7 @@ static int setup_frame32(int sig, struct k_sigaction *ka, 
	regs->psw.mask = PSW_MASK_BA |

		(PSW_USER_BITS & PSW_MASK_ASC) |

		(regs->psw.mask & ~PSW_MASK_ASC);

	regs->psw.addr = (__force __u64) ka->sa.sa_handler;

	regs->psw.addr = (__force __u64) ksig->ka.sa.sa_handler;



	regs->gprs[2] = map_signal(sig);

	regs->gprs[3] = (__force __u64) &frame->sc;
@@ -376,25 +377,21 @@ static int setup_frame32(int sig, struct k_sigaction *ka, 


	/* Place signal number on stack to allow backtrace from handler.  */

	if (__put_user(regs->gprs[2], (int __force __user *) &frame->signo))

		goto give_sigsegv;

	return 0;



give_sigsegv:

	force_sigsegv(sig, current);

		return -EFAULT;

	return 0;

}



static int setup_rt_frame32(int sig, struct k_sigaction *ka, siginfo_t *info,

			   sigset_t *set, struct pt_regs * regs)

static int setup_rt_frame32(struct ksignal *ksig, sigset_t *set,

			    struct pt_regs *regs)

{

	int err = 0;

	rt_sigframe32 __user *frame = get_sigframe(ka, regs, sizeof(rt_sigframe32));

	rt_sigframe32 __user *frame = get_sigframe(&ksig->ka, regs, sizeof(rt_sigframe32));



	if (frame == (void __user *) -1UL)

		goto give_sigsegv;

		return -EFAULT;



	if (copy_siginfo_to_user32(&frame->info, info))

		goto give_sigsegv;

	if (copy_siginfo_to_user32(&frame->info, &ksig->info))

		return -EFAULT;



	/* Create the ucontext.  */

	err |= __put_user(UC_EXTENDED, &frame->uc.uc_flags);
@@ -404,22 +401,22 @@ static int setup_rt_frame32(int sig, struct k_sigaction *ka, siginfo_t *info, 
	err |= save_sigregs_gprs_high(regs, frame->gprs_high);

	err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));

	if (err)

		goto give_sigsegv;

		return -EFAULT;



	/* Set up to return from userspace.  If provided, use a stub

	   already in userspace.  */

	if (ka->sa.sa_flags & SA_RESTORER) {

		regs->gprs[14] = (__u64 __force) ka->sa.sa_restorer | PSW32_ADDR_AMODE;

	if (ksig->ka.sa.sa_flags & SA_RESTORER) {

		regs->gprs[14] = (__u64 __force) ksig->ka.sa.sa_restorer | PSW32_ADDR_AMODE;

	} else {

		regs->gprs[14] = (__u64 __force) frame->retcode | PSW32_ADDR_AMODE;

		if (__put_user(S390_SYSCALL_OPCODE | __NR_rt_sigreturn,

			       (u16 __force __user *)(frame->retcode)))

			goto give_sigsegv;

			return -EFAULT;

	}



	/* Set up backchain. */

	if (__put_user(regs->gprs[15], (unsigned int __force __user *) frame))

		goto give_sigsegv;

		return -EFAULT;



	/* Set up registers for signal handler */

	regs->gprs[15] = (__force __u64) frame;
@@ -427,36 +424,30 @@ static int setup_rt_frame32(int sig, struct k_sigaction *ka, siginfo_t *info, 
	regs->psw.mask = PSW_MASK_BA |

		(PSW_USER_BITS & PSW_MASK_ASC) |

		(regs->psw.mask & ~PSW_MASK_ASC);

	regs->psw.addr = (__u64 __force) ka->sa.sa_handler;

	regs->psw.addr = (__u64 __force) ksig->ka.sa.sa_handler;



	regs->gprs[2] = map_signal(sig);

	regs->gprs[2] = map_signal(ksig->sig);

	regs->gprs[3] = (__force __u64) &frame->info;

	regs->gprs[4] = (__force __u64) &frame->uc;

	regs->gprs[5] = task_thread_info(current)->last_break;

	return 0;



give_sigsegv:

	force_sigsegv(sig, current);

	return -EFAULT;

}



/*

 * OK, we're invoking a handler

 */	



void handle_signal32(unsigned long sig, struct k_sigaction *ka,

		    siginfo_t *info, sigset_t *oldset, struct pt_regs *regs)

void handle_signal32(struct ksignal *ksig, sigset_t *oldset,

		     struct pt_regs *regs)

{

	int ret;



	/* Set up the stack frame */

	if (ka->sa.sa_flags & SA_SIGINFO)

		ret = setup_rt_frame32(sig, ka, info, oldset, regs);

	if (ksig->ka.sa.sa_flags & SA_SIGINFO)

		ret = setup_rt_frame32(ksig, oldset, regs);

	else

		ret = setup_frame32(sig, ka, oldset, regs);

	if (ret)

		return;

	signal_delivered(sig, info, ka, regs,

				 test_thread_flag(TIF_SINGLE_STEP));

		ret = setup_frame32(ksig, oldset, regs);



	signal_setup_done(ret, ksig, test_thread_flag(TIF_SINGLE_STEP));

}

arch/s390/kernel/entry.h

+2 −2
Original line number Diff line number Diff line
@@ -48,8 +48,8 @@ void do_per_trap(struct pt_regs *regs); 
void syscall_trace(struct pt_regs *regs, int entryexit);

void kernel_stack_overflow(struct pt_regs * regs);

void do_signal(struct pt_regs *regs);

void handle_signal32(unsigned long sig, struct k_sigaction *ka,

		    siginfo_t *info, sigset_t *oldset, struct pt_regs *regs);

void handle_signal32(struct ksignal *ksig, sigset_t *oldset,

		     struct pt_regs *regs);

void do_notify_resume(struct pt_regs *regs);



void __init init_IRQ(void);

arch/s390/kernel/signal.c

+32 −46
Original line number Diff line number Diff line
@@ -200,15 +200,15 @@ static int setup_frame(int sig, struct k_sigaction *ka, 
	frame = get_sigframe(ka, regs, sizeof(sigframe));



	if (frame == (void __user *) -1UL)

		goto give_sigsegv;

		return -EFAULT;



	if (__copy_to_user(&frame->sc.oldmask, &set->sig, _SIGMASK_COPY_SIZE))

		goto give_sigsegv;

		return -EFAULT;



	if (save_sigregs(regs, &frame->sregs))

		goto give_sigsegv;

		return -EFAULT;

	if (__put_user(&frame->sregs, &frame->sc.sregs))

		goto give_sigsegv;

		return -EFAULT;



	/* Set up to return from userspace.  If provided, use a stub

	   already in userspace.  */
@@ -220,12 +220,12 @@ static int setup_frame(int sig, struct k_sigaction *ka, 
			frame->retcode | PSW_ADDR_AMODE;

		if (__put_user(S390_SYSCALL_OPCODE | __NR_sigreturn,

	                       (u16 __user *)(frame->retcode)))

			goto give_sigsegv;

			return -EFAULT;

	}



	/* Set up backchain. */

	if (__put_user(regs->gprs[15], (addr_t __user *) frame))

		goto give_sigsegv;

		return -EFAULT;



	/* Set up registers for signal handler */

	regs->gprs[15] = (unsigned long) frame;
@@ -250,27 +250,23 @@ static int setup_frame(int sig, struct k_sigaction *ka, 


	/* Place signal number on stack to allow backtrace from handler.  */

	if (__put_user(regs->gprs[2], (int __user *) &frame->signo))

		goto give_sigsegv;

	return 0;



give_sigsegv:

	force_sigsegv(sig, current);

		return -EFAULT;

	return 0;

}



static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,

			   sigset_t *set, struct pt_regs * regs)

static int setup_rt_frame(struct ksignal *ksig, sigset_t *set,

			  struct pt_regs *regs)

{

	int err = 0;

	rt_sigframe __user *frame;



	frame = get_sigframe(ka, regs, sizeof(rt_sigframe));

	frame = get_sigframe(&ksig->ka, regs, sizeof(rt_sigframe));



	if (frame == (void __user *) -1UL)

		goto give_sigsegv;

		return -EFAULT;



	if (copy_siginfo_to_user(&frame->info, info))

		goto give_sigsegv;

	if (copy_siginfo_to_user(&frame->info, &ksig->info))

		return -EFAULT;



	/* Create the ucontext.  */

	err |= __put_user(0, &frame->uc.uc_flags);
@@ -279,24 +275,24 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info, 
	err |= save_sigregs(regs, &frame->uc.uc_mcontext);

	err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));

	if (err)

		goto give_sigsegv;

		return -EFAULT;



	/* Set up to return from userspace.  If provided, use a stub

	   already in userspace.  */

	if (ka->sa.sa_flags & SA_RESTORER) {

	if (ksig->ka.sa.sa_flags & SA_RESTORER) {

                regs->gprs[14] = (unsigned long)

			ka->sa.sa_restorer | PSW_ADDR_AMODE;

			ksig->ka.sa.sa_restorer | PSW_ADDR_AMODE;

	} else {

                regs->gprs[14] = (unsigned long)

			frame->retcode | PSW_ADDR_AMODE;

		if (__put_user(S390_SYSCALL_OPCODE | __NR_rt_sigreturn,

			       (u16 __user *)(frame->retcode)))

			goto give_sigsegv;

			return -EFAULT;

	}



	/* Set up backchain. */

	if (__put_user(regs->gprs[15], (addr_t __user *) frame))

		goto give_sigsegv;

		return -EFAULT;



	/* Set up registers for signal handler */

	regs->gprs[15] = (unsigned long) frame;
@@ -304,34 +300,27 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info, 
	regs->psw.mask = PSW_MASK_EA | PSW_MASK_BA |

		(PSW_USER_BITS & PSW_MASK_ASC) |

		(regs->psw.mask & ~PSW_MASK_ASC);

	regs->psw.addr = (unsigned long) ka->sa.sa_handler | PSW_ADDR_AMODE;

	regs->psw.addr = (unsigned long) ksig->ka.sa.sa_handler | PSW_ADDR_AMODE;



	regs->gprs[2] = map_signal(sig);

	regs->gprs[2] = map_signal(ksig->sig);

	regs->gprs[3] = (unsigned long) &frame->info;

	regs->gprs[4] = (unsigned long) &frame->uc;

	regs->gprs[5] = task_thread_info(current)->last_break;

	return 0;



give_sigsegv:

	force_sigsegv(sig, current);

	return -EFAULT;

}



static void handle_signal(unsigned long sig, struct k_sigaction *ka,

			 siginfo_t *info, sigset_t *oldset,

static void handle_signal(struct ksignal *ksig, sigset_t *oldset,

			  struct pt_regs *regs)

{

	int ret;



	/* Set up the stack frame */

	if (ka->sa.sa_flags & SA_SIGINFO)

		ret = setup_rt_frame(sig, ka, info, oldset, regs);

	if (ksig->ka.sa.sa_flags & SA_SIGINFO)

		ret = setup_rt_frame(ksig, oldset, regs);

	else

		ret = setup_frame(sig, ka, oldset, regs);

	if (ret)

		return;

	signal_delivered(sig, info, ka, regs,

				 test_thread_flag(TIF_SINGLE_STEP));

		ret = setup_frame(ksig->sig, &ksig->ka, oldset, regs);



	signal_setup_done(ret, ksig, test_thread_flag(TIF_SINGLE_STEP));

}



/*
@@ -345,9 +334,7 @@ static void handle_signal(unsigned long sig, struct k_sigaction *ka, 
 */

void do_signal(struct pt_regs *regs)

{

	siginfo_t info;

	int signr;

	struct k_sigaction ka;

	struct ksignal ksig;

	sigset_t *oldset = sigmask_to_save();



	/*
@@ -357,9 +344,8 @@ void do_signal(struct pt_regs *regs) 
	 */

	current_thread_info()->system_call =

		test_pt_regs_flag(regs, PIF_SYSCALL) ? regs->int_code : 0;

	signr = get_signal_to_deliver(&info, &ka, regs, NULL);



	if (signr > 0) {

	if (get_signal(&ksig)) {

		/* Whee!  Actually deliver the signal.  */

		if (current_thread_info()->system_call) {

			regs->int_code = current_thread_info()->system_call;
@@ -370,7 +356,7 @@ void do_signal(struct pt_regs *regs) 
				regs->gprs[2] = -EINTR;

				break;

			case -ERESTARTSYS:

				if (!(ka.sa.sa_flags & SA_RESTART)) {

				if (!(ksig.ka.sa.sa_flags & SA_RESTART)) {

					regs->gprs[2] = -EINTR;

					break;

				}
@@ -387,9 +373,9 @@ void do_signal(struct pt_regs *regs) 
		clear_pt_regs_flag(regs, PIF_SYSCALL);



		if (is_compat_task())

			handle_signal32(signr, &ka, &info, oldset, regs);

			handle_signal32(&ksig, oldset, regs);

		else

			handle_signal(signr, &ka, &info, oldset, regs);

			handle_signal(&ksig, oldset, regs);

		return;

	}