patch-2.4.19 linux-2.4.19/arch/sparc/kernel/signal.c

• Lines: 115
• Date: Fri Aug 2 17:39:43 2002
• Orig file: linux-2.4.18/arch/sparc/kernel/signal.c
• Orig date: Wed Jan 24 15:18:06 2001

diff -urN linux-2.4.18/arch/sparc/kernel/signal.c linux-2.4.19/arch/sparc/kernel/signal.c
@@ -664,6 +664,7 @@
 	regs->u_regs[UREG_FP] = (unsigned long) sf;
 	regs->u_regs[UREG_I0] = signo;
 	regs->u_regs[UREG_I1] = (unsigned long) &sf->info;
+	regs->u_regs[UREG_I2] = (unsigned long) &sf->info;
 
 	/* 4. signal handler */
 	regs->pc = (unsigned long) ka->sa.sa_handler;
@@ -747,6 +748,7 @@
 	regs->u_regs[UREG_FP] = (unsigned long) sf;
 	regs->u_regs[UREG_I0] = signo;
 	regs->u_regs[UREG_I1] = (unsigned long) &sf->info;
+	regs->u_regs[UREG_I2] = (unsigned long) &sf->regs;
 
 	regs->pc = (unsigned long) ka->sa.sa_handler;
 	regs->npc = (regs->pc + 4);
@@ -1172,9 +1174,22 @@
 		signr = dequeue_signal(&current->blocked, &info);
 		spin_unlock_irq(&current->sigmask_lock);
 
-		if (!signr) break;
+		if (!signr)
+			break;
 
 		if ((current->ptrace & PT_PTRACED) && signr != SIGKILL) {
+			/* Do the syscall restart before we let the debugger
+			 * look at the child registers.
+			 */
+			if (restart_syscall &&
+			    (regs->u_regs[UREG_I0] == ERESTARTNOHAND ||
+			     regs->u_regs[UREG_I0] == ERESTARTSYS ||
+			     regs->u_regs[UREG_I0] == ERESTARTNOINTR)) {
+				regs->u_regs[UREG_I0] = orig_i0;
+				regs->pc -= 4;
+				regs->npc -= 4;
+				restart_syscall = 0;
+			}
 			current->exit_code = signr;
 			current->state = TASK_STOPPED;
 
@@ -1207,8 +1222,8 @@
 
 		ka = &current->sig->action[signr-1];
 
-		if(ka->sa.sa_handler == SIG_IGN) {
-			if(signr != SIGCHLD)
+		if (ka->sa.sa_handler == SIG_IGN) {
+			if (signr != SIGCHLD)
 				continue;
 
 			/* sys_wait4() grabs the master kernel lock, so
@@ -1216,16 +1231,16 @@
 			 * threaded and would not be that difficult to
 			 * do anyways.
 			 */
-			while(sys_wait4(-1, NULL, WNOHANG, NULL) > 0)
+			while (sys_wait4(-1, NULL, WNOHANG, NULL) > 0)
 				;
 			continue;
 		}
-		if(ka->sa.sa_handler == SIG_DFL) {
+		if (ka->sa.sa_handler == SIG_DFL) {
 			unsigned long exit_code = signr;
 
-			if(current->pid == 1)
+			if (current->pid == 1)
 				continue;
-			switch(signr) {
+			switch (signr) {
 			case SIGCONT: case SIGCHLD: case SIGWINCH:
 				continue;
 
@@ -1244,8 +1259,8 @@
 				current->exit_code = signr;
 
 				/* notify_parent() is SMP safe */
-				if(!(current->p_pptr->sig->action[SIGCHLD-1].sa.sa_flags &
-				     SA_NOCLDSTOP))
+				if (!(current->p_pptr->sig->action[SIGCHLD-1].sa.sa_flags &
+				      SA_NOCLDSTOP))
 					notify_parent(current, SIGCHLD);
 				schedule();
 				continue;
@@ -1264,8 +1279,8 @@
 					struct reg_window *rw = (struct reg_window *)regs->u_regs[UREG_FP];
 					unsigned int ins[8];
 
-					while(rw &&
-					      !(((unsigned long) rw) & 0x3)) {
+					while (rw &&
+					       !(((unsigned long) rw) & 0x3)) {
 						copy_from_user(ins, &rw->ins[0], sizeof(ins));
 						printk("Caller[%08x](%08x,%08x,%08x,%08x,%08x,%08x)\n", ins[7], ins[0], ins[1], ins[2], ins[3], ins[4], ins[5]);
 						rw = (struct reg_window *)(unsigned long)ins[6];
@@ -1286,15 +1301,15 @@
 				/* NOT REACHED */
 			}
 		}
-		if(restart_syscall)
+		if (restart_syscall)
 			syscall_restart(orig_i0, regs, &ka->sa);
 		handle_signal(signr, ka, &info, oldset, regs, svr4_signal);
 		return 1;
 	}
-	if(restart_syscall &&
-	   (regs->u_regs[UREG_I0] == ERESTARTNOHAND ||
-	    regs->u_regs[UREG_I0] == ERESTARTSYS ||
-	    regs->u_regs[UREG_I0] == ERESTARTNOINTR)) {
+	if (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] = orig_i0;
 		regs->pc -= 4;