--- zzzz-none-000/linux-3.10.107/arch/openrisc/kernel/signal.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/arch/openrisc/kernel/signal.c	2021-02-04 17:41:59.000000000 +0000
@@ -46,7 +46,7 @@
 	int err = 0;
 
 	/* Always make any pending restarted system calls return -EINTR */
-	current_thread_info()->restart_block.fn = do_no_restart_syscall;
+	current->restart_block.fn = do_no_restart_syscall;
 
 	/*
 	 * Restore the regs from &sc->regs.
@@ -132,30 +132,16 @@
  * or the alternate stack.
  */
 
-static inline void __user *get_sigframe(struct k_sigaction *ka,
+static inline void __user *get_sigframe(struct ksignal *ksig,
 					struct pt_regs *regs, size_t frame_size)
 {
 	unsigned long sp = regs->sp;
-	int onsigstack = on_sig_stack(sp);
 
 	/* redzone */
 	sp -= STACK_FRAME_OVERHEAD;
-
-	/* This is the X/Open sanctioned signal stack switching.  */
-	if ((ka->sa.sa_flags & SA_ONSTACK) && !onsigstack) {
-		if (current->sas_ss_size)
-			sp = current->sas_ss_sp + current->sas_ss_size;
-	}
-
+	sp = sigsp(sp, ksig);
 	sp = align_sigframe(sp - frame_size);
 
-	/*
-	 * If we are on the alternate signal stack and would overflow it, don't.
-	 * Return an always-bogus address instead so we will die with SIGSEGV.
-	 */
-	if (onsigstack && !likely(on_sig_stack(sp)))
-		return (void __user *)-1L;
-
 	return (void __user *)sp;
 }
 
@@ -166,20 +152,21 @@
  * trampoline which performs the syscall sigreturn, or a provided
  * user-mode trampoline.
  */
-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)
 {
 	struct rt_sigframe *frame;
 	unsigned long return_ip;
 	int err = 0;
 
-	frame = get_sigframe(ka, regs, sizeof(*frame));
+	frame = get_sigframe(ksig, regs, sizeof(*frame));
+
 	if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
-		goto give_sigsegv;
+		return -EFAULT;
 
 	/* Create siginfo.  */
-	if (ka->sa.sa_flags & SA_SIGINFO)
-		err |= copy_siginfo_to_user(&frame->info, info);
+	if (ksig->ka.sa.sa_flags & SA_SIGINFO)
+		err |= copy_siginfo_to_user(&frame->info, &ksig->info);
 
 	/* Create the ucontext.  */
 	err |= __put_user(0, &frame->uc.uc_flags);
@@ -190,7 +177,7 @@
 	err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
 
 	if (err)
-		goto give_sigsegv;
+		return -EFAULT;
 
 	/* trampoline - the desired return ip is the retcode itself */
 	return_ip = (unsigned long)&frame->retcode;
@@ -204,14 +191,12 @@
 	err |= __put_user(0x15000000, (unsigned long *)(frame->retcode + 8));
 
 	if (err)
-		goto give_sigsegv;
-
-	/* TODO what is the current->exec_domain stuff and invmap ? */
+		return -EFAULT;
 
 	/* Set up registers for signal handler */
-	regs->pc = (unsigned long)ka->sa.sa_handler; /* what we enter NOW */
+	regs->pc = (unsigned long)ksig->ka.sa.sa_handler; /* what we enter NOW */
 	regs->gpr[9] = (unsigned long)return_ip;     /* what we enter LATER */
-	regs->gpr[3] = (unsigned long)sig;           /* arg 1: signo */
+	regs->gpr[3] = (unsigned long)ksig->sig;           /* arg 1: signo */
 	regs->gpr[4] = (unsigned long)&frame->info;  /* arg 2: (siginfo_t*) */
 	regs->gpr[5] = (unsigned long)&frame->uc;    /* arg 3: ucontext */
 
@@ -219,25 +204,16 @@
 	regs->sp = (unsigned long)frame;
 
 	return 0;
-
-give_sigsegv:
-	force_sigsegv(sig, current);
-	return -EFAULT;
 }
 
 static inline void
-handle_signal(unsigned long sig,
-	      siginfo_t *info, struct k_sigaction *ka,
-	      struct pt_regs *regs)
+handle_signal(struct ksignal *ksig, struct pt_regs *regs)
 {
 	int ret;
 
-	ret = setup_rt_frame(sig, ka, info, sigmask_to_save(), regs);
-	if (ret)
-		return;
+	ret = setup_rt_frame(ksig, sigmask_to_save(), regs);
 
-	signal_delivered(sig, info, ka, regs,
-				 test_thread_flag(TIF_SINGLESTEP));
+	signal_setup_done(ret, ksig, test_thread_flag(TIF_SINGLESTEP));
 }
 
 /*
@@ -254,9 +230,7 @@
 
 int do_signal(struct pt_regs *regs, int syscall)
 {
-	siginfo_t info;
-	int signr;
-	struct k_sigaction ka;
+	struct ksignal ksig;
 	unsigned long continue_addr = 0;
 	unsigned long restart_addr = 0;
 	unsigned long retval = 0;
@@ -286,28 +260,23 @@
 	}
 
 	/*
-	 * Get the signal to deliver.  When running under ptrace, at this
-	 * point the debugger may change all our registers ...
+	 * Get the signal to deliver.  During the call to get_signal the
+	 * debugger may change all our registers so we may need to revert
+	 * the decision to restart the syscall; specifically, if the PC is
+	 * changed, don't restart the syscall.
 	 */
-	signr = get_signal_to_deliver(&info, &ka, regs, NULL);
-	/*
-	 * Depending on the signal settings we may need to revert the
-	 * decision to restart the system call.  But skip this if a
-	 * debugger has chosen to restart at a different PC.
-	 */
-	if (signr > 0) {
+	if (get_signal(&ksig)) {
 		if (unlikely(restart) && regs->pc == restart_addr) {
 			if (retval == -ERESTARTNOHAND ||
 			    retval == -ERESTART_RESTARTBLOCK
 			    || (retval == -ERESTARTSYS
-			        && !(ka.sa.sa_flags & SA_RESTART))) {
+			        && !(ksig.ka.sa.sa_flags & SA_RESTART))) {
 				/* No automatic restart */
 				regs->gpr[11] = -EINTR;
 				regs->pc = continue_addr;
 			}
 		}
-
-		handle_signal(signr, &info, &ka, regs);
+		handle_signal(&ksig, regs);
 	} else {
 		/* no handler */
 		restore_saved_sigmask();