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Commit 238468b2 authored by David S. Miller's avatar David S. Miller
Browse files

[SPARC64]: Use trap type stored in pt_regs to handle syscall restart. 



Now that we can check the trap type directly, we don't need the
funny restart_syscall indication from the trap return paths.

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 8243e40a

arch/sparc64/kernel/signal.c

+13 −9
Original line number Diff line number Diff line
@@ -510,15 +510,20 @@ 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.

 */

static void do_signal(struct pt_regs *regs, unsigned long orig_i0, int restart_syscall)

static void do_signal(struct pt_regs *regs, unsigned long orig_i0)

{

	siginfo_t info;

	struct signal_deliver_cookie cookie;

	struct k_sigaction ka;

	int signr;

	sigset_t *oldset;

	

	cookie.restart_syscall = restart_syscall;

	siginfo_t info;

	int signr, tt;

	

	tt = regs->magic & 0x1ff;

	if (tt == 0x110 || tt == 0x111 || tt == 0x16d) {

		regs->magic &= ~0x1ff;

		cookie.restart_syscall = 1;

	} else

		cookie.restart_syscall = 0;

	cookie.orig_i0 = orig_i0;



	if (test_thread_flag(TIF_RESTORE_SIGMASK))
@@ -529,9 +534,8 @@ static void do_signal(struct pt_regs *regs, unsigned long orig_i0, int restart_s 
#ifdef CONFIG_SPARC32_COMPAT

	if (test_thread_flag(TIF_32BIT)) {

		extern void do_signal32(sigset_t *, struct pt_regs *,

					unsigned long, int);

		do_signal32(oldset, regs, orig_i0,

			    cookie.restart_syscall);

					struct signal_deliver_cookie *);

		do_signal32(oldset, regs, &cookie);

		return;

	}

#endif
@@ -539,7 +543,7 @@ static void do_signal(struct pt_regs *regs, unsigned long orig_i0, int restart_s 
	signr = get_signal_to_deliver(&info, &ka, regs, &cookie);

	if (signr > 0) {

		if (cookie.restart_syscall)

			syscall_restart(orig_i0, regs, &ka.sa);

			syscall_restart(cookie.orig_i0, regs, &ka.sa);

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



		/* a signal was successfully delivered; the saved
@@ -580,7 +584,7 @@ void do_notify_resume(struct pt_regs *regs, unsigned long orig_i0, int restart_s 
		      unsigned long thread_info_flags)

{

	if (thread_info_flags & (_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK))

		do_signal(regs, orig_i0, restart_syscall);

		do_signal(regs, orig_i0);

}



void ptrace_signal_deliver(struct pt_regs *regs, void *cookie)

arch/sparc64/kernel/signal32.c

+8 −12
Original line number Diff line number Diff line
@@ -982,20 +982,16 @@ static inline void syscall_restart32(unsigned long orig_i0, struct pt_regs *regs 
 * mistake.

 */

void do_signal32(sigset_t *oldset, struct pt_regs * regs,

		 unsigned long orig_i0, int restart_syscall)

		 struct signal_deliver_cookie *cookie)

{

	siginfo_t info;

	struct signal_deliver_cookie cookie;

	struct k_sigaction ka;

	siginfo_t info;

	int signr;

	

	cookie.restart_syscall = restart_syscall;

	cookie.orig_i0 = orig_i0;



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

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

	if (signr > 0) {

		if (cookie.restart_syscall)

			syscall_restart32(orig_i0, regs, &ka.sa);

		if (cookie->restart_syscall)

			syscall_restart32(cookie->orig_i0, regs, &ka.sa);

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



		/* a signal was successfully delivered; the saved
@@ -1007,16 +1003,16 @@ void do_signal32(sigset_t *oldset, struct pt_regs * regs, 
			clear_thread_flag(TIF_RESTORE_SIGMASK);

		return;

	}

	if (cookie.restart_syscall &&

	if (cookie->restart_syscall &&

	    (regs->u_regs[UREG_I0] == ERESTARTNOHAND ||

	     regs->u_regs[UREG_I0] == ERESTARTSYS ||

	     regs->u_regs[UREG_I0] == ERESTARTNOINTR)) {

		/* replay the system call when we are done */

		regs->u_regs[UREG_I0] = cookie.orig_i0;

		regs->u_regs[UREG_I0] = cookie->orig_i0;

		regs->tpc -= 4;

		regs->tnpc -= 4;

	}

	if (cookie.restart_syscall &&

	if (cookie->restart_syscall &&

	    regs->u_regs[UREG_I0] == ERESTART_RESTARTBLOCK) {

		regs->u_regs[UREG_G1] = __NR_restart_syscall;

		regs->tpc -= 4;