1 files changed, 43 insertions, 189 deletions

diff --git a/arch/cris/arch-v32/kernel/signal.c b/arch/cris/arch-v32/kernel/signal.c
index fb4c79d5b76..01d1375c900 100644
--- a/arch/cris/arch-v32/kernel/signal.c
+++ b/arch/cris/arch-v32/kernel/signal.c
@@ -4,6 +4,7 @@
 
 #include <linux/sched.h>
 #include <linux/mm.h>
+#include <linux/slab.h>
 #include <linux/kernel.h>
 #include <linux/signal.h>
 #include <linux/errno.h>
@@ -18,14 +19,11 @@
 #include <asm/processor.h>
 #include <asm/ucontext.h>
 #include <asm/uaccess.h>
-#include <asm/arch/ptrace.h>
-#include <asm/arch/hwregs/cpu_vect.h>
+#include <arch/ptrace.h>
+#include <arch/hwregs/cpu_vect.h>
 
 extern unsigned long cris_signal_return_page;
 
-/* Flag to check if a signal is blockable. */
-#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
-
 /*
  * A syscall in CRIS is really a "break 13" instruction, which is 2
  * bytes. The registers is manipulated so upon return the instruction
@@ -50,128 +48,9 @@ struct rt_signal_frame {
 	unsigned char retcode[8];	/* Trampoline code. */
 };
 
-int do_signal(int restart, sigset_t *oldset, struct pt_regs *regs);
+void do_signal(int restart, struct pt_regs *regs);
 void keep_debug_flags(unsigned long oldccs, unsigned long oldspc,
 		      struct pt_regs *regs);
-/*
- * Swap in the new signal mask, and wait for a signal. Define some
- * dummy arguments to be able to reach the regs argument.
- */
-int
-sys_sigsuspend(old_sigset_t mask, long r11, long r12, long r13, long mof,
-	       long srp, struct pt_regs *regs)
-{
-	sigset_t saveset;
-
-	mask &= _BLOCKABLE;
-
-	spin_lock_irq(&current->sighand->siglock);
-
-	saveset = current->blocked;
-
-	siginitset(&current->blocked, mask);
-
-	recalc_sigpending();
-	spin_unlock_irq(&current->sighand->siglock);
-
-	regs->r10 = -EINTR;
-
-	while (1) {
-		current->state = TASK_INTERRUPTIBLE;
-		schedule();
-
-		if (do_signal(0, &saveset, regs)) {
-			/*
-			 * This point is reached twice: once to call
-			 * the signal handler, then again to return
-			 * from the sigsuspend system call. When
-			 * calling the signal handler, R10 hold the
-			 * signal number as set by do_signal(). The
-			 * sigsuspend  call will always return with
-			 * the restored value above; -EINTR.
-			 */
-			return regs->r10;
-		}
-	}
-}
-
-/* Define some dummy arguments to be able to reach the regs argument. */
-int
-sys_rt_sigsuspend(sigset_t *unewset, size_t sigsetsize, long r12, long r13,
-		  long mof, long srp, struct pt_regs *regs)
-{
-	sigset_t saveset;
-	sigset_t newset;
-
-	if (sigsetsize != sizeof(sigset_t))
-		return -EINVAL;
-
-	if (copy_from_user(&newset, unewset, sizeof(newset)))
-		return -EFAULT;
-
-	sigdelsetmask(&newset, ~_BLOCKABLE);
-	spin_lock_irq(&current->sighand->siglock);
-
-	saveset = current->blocked;
-	current->blocked = newset;
-
-	recalc_sigpending();
-	spin_unlock_irq(&current->sighand->siglock);
-
-	regs->r10 = -EINTR;
-
-	while (1) {
-		current->state = TASK_INTERRUPTIBLE;
-		schedule();
-
-		if (do_signal(0, &saveset, regs)) {
-			/* See comment in function above. */
-			return regs->r10;
-		}
-	}
-}
-
-int
-sys_sigaction(int signal, const struct old_sigaction *act,
-	      struct old_sigaction *oact)
-{
-	int retval;
-	struct k_sigaction newk;
-	struct k_sigaction oldk;
-
-	if (act) {
-		old_sigset_t mask;
-
-		if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
-		    __get_user(newk.sa.sa_handler, &act->sa_handler) ||
-		    __get_user(newk.sa.sa_restorer, &act->sa_restorer))
-			return -EFAULT;
-
-		__get_user(newk.sa.sa_flags, &act->sa_flags);
-		__get_user(mask, &act->sa_mask);
-		siginitset(&newk.sa.sa_mask, mask);
-	}
-
-	retval = do_sigaction(signal, act ? &newk : NULL, oact ? &oldk : NULL);
-
-	if (!retval && oact) {
-		if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
-		    __put_user(oldk.sa.sa_handler, &oact->sa_handler) ||
-		    __put_user(oldk.sa.sa_restorer, &oact->sa_restorer))
-			return -EFAULT;
-
-		__put_user(oldk.sa.sa_flags, &oact->sa_flags);
-		__put_user(oldk.sa.sa_mask.sig[0], &oact->sa_mask);
-	}
-
-	return retval;
-}
-
-int
-sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss)
-{
-	return do_sigaltstack(uss, uoss, rdusp());
-}
 
 static int
 restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc)
@@ -203,11 +82,9 @@ badframe:
 	return 1;
 }
 
-/* Define some dummy arguments to be able to reach the regs argument. */
-asmlinkage int
-sys_sigreturn(long r10, long r11, long r12, long r13, long mof, long srp,
-	      struct pt_regs *regs)
+asmlinkage int sys_sigreturn(void)
 {
+	struct pt_regs *regs = current_pt_regs();
 	sigset_t set;
 	struct signal_frame __user *frame;
 	unsigned long oldspc = regs->spc;
@@ -232,13 +109,7 @@ sys_sigreturn(long r10, long r11, long r12, long r13, long mof, long srp,
 						 sizeof(frame->extramask))))
 		goto badframe;
 
-	sigdelsetmask(&set, ~_BLOCKABLE);
-	spin_lock_irq(&current->sighand->siglock);
-
-	current->blocked = set;
-
-	recalc_sigpending();
-	spin_unlock_irq(&current->sighand->siglock);
+	set_current_blocked(&set);
 
 	if (restore_sigcontext(regs, &frame->sc))
 		goto badframe;
@@ -252,11 +123,9 @@ badframe:
 	return 0;
 }
 
-/* Define some dummy variables to be able to reach the regs argument. */
-asmlinkage int
-sys_rt_sigreturn(long r10, long r11, long r12, long r13, long mof, long srp,
-		 struct pt_regs *regs)
+asmlinkage int sys_rt_sigreturn(void)
 {
+	struct pt_regs *regs = current_pt_regs();
 	sigset_t set;
 	struct rt_signal_frame __user *frame;
 	unsigned long oldspc = regs->spc;
@@ -278,19 +147,13 @@ sys_rt_sigreturn(long r10, long r11, long r12, long r13, long mof, long srp,
 	if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
 		goto badframe;
 
-	sigdelsetmask(&set, ~_BLOCKABLE);
-	spin_lock_irq(&current->sighand->siglock);
-
-	current->blocked = set;
-
-	recalc_sigpending();
-	spin_unlock_irq(&current->sighand->siglock);
+	set_current_blocked(&set);
 
 	if (restore_sigcontext(regs, &frame->uc.uc_mcontext))
 		goto badframe;
 
-	if (do_sigaltstack(&frame->uc.uc_stack, NULL, rdusp()) == -EFAULT)
- 		goto badframe;
+	if (restore_altstack(&frame->uc.uc_stack))
+		goto badframe;
 
 	keep_debug_flags(oldccs, oldspc, regs);
 
@@ -351,7 +214,7 @@ get_sigframe(struct k_sigaction *ka, struct pt_regs * regs, size_t frame_size)
  * which performs the syscall sigreturn(), or a provided user-mode
  * trampoline.
   */
-static void
+static int
 setup_frame(int sig, struct k_sigaction *ka,  sigset_t *set,
 	    struct pt_regs * regs)
 {
@@ -417,16 +280,14 @@ setup_frame(int sig, struct k_sigaction *ka,  sigset_t *set,
 	/* Actually move the USP to reflect the stacked frame. */
 	wrusp((unsigned long)frame);
 
-	return;
+	return 0;
 
 give_sigsegv:
-	if (sig == SIGSEGV)
-		ka->sa.sa_handler = SIG_DFL;
-
-	force_sig(SIGSEGV, current);
+	force_sigsegv(sig, current);
+	return -EFAULT;
 }
 
-static void
+static int
 setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
 	       sigset_t *set, struct pt_regs * regs)
 {
@@ -453,6 +314,7 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
 	err |= __clear_user(&frame->uc, offsetof(struct ucontext, uc_mcontext));
 	err |= setup_sigcontext(&frame->uc.uc_mcontext, regs, set->sig[0]);
 	err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
+	err |= __save_altstack(&frame->uc.uc_stack, rdusp());
 
 	if (err)
 		goto give_sigsegv;
@@ -503,21 +365,22 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
 	/* Actually move the usp to reflect the stacked frame. */
 	wrusp((unsigned long)frame);
 
-	return;
+	return 0;
 
 give_sigsegv:
-	if (sig == SIGSEGV)
-		ka->sa.sa_handler = SIG_DFL;
-
-	force_sig(SIGSEGV, current);
+	force_sigsegv(sig, current);
+	return -EFAULT;
 }
 
-/* Invoke a singal handler to, well, handle the signal. */
-extern inline void
+/* Invoke a signal handler to, well, handle the signal. */
+static inline void
 handle_signal(int canrestart, unsigned long sig,
 	      siginfo_t *info, struct k_sigaction *ka,
-              sigset_t *oldset, struct pt_regs * regs)
+              struct pt_regs * regs)
 {
+	sigset_t *oldset = sigmask_to_save();
+	int ret;
+
 	/* Check if this got called from a system call. */
 	if (canrestart) {
 		/* If so, check system call restarting. */
@@ -561,20 +424,12 @@ handle_signal(int canrestart, unsigned long sig,
 
 	/* Set up the stack frame. */
 	if (ka->sa.sa_flags & SA_SIGINFO)
-		setup_rt_frame(sig, ka, info, oldset, regs);
+		ret = setup_rt_frame(sig, ka, info, oldset, regs);
 	else
-		setup_frame(sig, ka, oldset, regs);
+		ret = setup_frame(sig, ka, oldset, regs);
 
-	if (ka->sa.sa_flags & SA_ONESHOT)
-		ka->sa.sa_handler = SIG_DFL;
-
-	if (!(ka->sa.sa_flags & SA_NODEFER)) {
-		spin_lock_irq(&current->sighand->siglock);
-		sigorsets(&current->blocked,&current->blocked,&ka->sa.sa_mask);
-		sigaddset(&current->blocked,sig);
-		recalc_sigpending();
-		spin_unlock_irq(&current->sighand->siglock);
-	}
+	if (ret == 0)
+		signal_delivered(sig, info, ka, regs, 0);
 }
 
 /*
@@ -588,8 +443,8 @@ handle_signal(int canrestart, unsigned long sig,
  * we can use user_mode(regs) to see if we came directly from kernel or user
  * mode below.
  */
-int
-do_signal(int canrestart, sigset_t *oldset, struct pt_regs *regs)
+void
+do_signal(int canrestart, struct pt_regs *regs)
 {
 	int signr;
 	siginfo_t info;
@@ -601,17 +456,14 @@ do_signal(int canrestart, sigset_t *oldset, struct pt_regs *regs)
 	 * without doing anything.
 	 */
 	if (!user_mode(regs))
-		return 1;
-
-	if (!oldset)
-		oldset = &current->blocked;
+		return;
 
 	signr = get_signal_to_deliver(&info, &ka, regs, NULL);
 
 	if (signr > 0) {
-		/* Deliver the signal. */
-		handle_signal(canrestart, signr, &info, &ka, oldset, regs);
-		return 1;
+		/* Whee!  Actually deliver the signal.  */
+		handle_signal(canrestart, signr, &info, &ka, regs);
+		return;
 	}
 
 	/* Got here from a system call? */
@@ -624,12 +476,14 @@ do_signal(int canrestart, sigset_t *oldset, struct pt_regs *regs)
 		}
 
 		if (regs->r10 == -ERESTART_RESTARTBLOCK){
-			regs->r10 = __NR_restart_syscall;
+			regs->r9 = __NR_restart_syscall;
 			regs->erp -= 2;
 		}
 	}
 
-	return 0;
+	/* if there's no signal to deliver, we just put the saved sigmask
+	 * back */
+	restore_saved_sigmask();
 }
 
 asmlinkage void
@@ -642,7 +496,7 @@ ugdb_trap_user(struct thread_info *ti, int sig)
 		user_regs(ti)->spc = 0;
 	}
 	/* FIXME: Filter out false h/w breakpoint hits (i.e. EDA
-	   not withing any configured h/w breakpoint range). Synchronize with
+	   not within any configured h/w breakpoint range). Synchronize with
 	   what already exists for kernel debugging.  */
 	if (((user_regs(ti)->exs & 0xff00) >> 8) == BREAK_8_INTR_VECT) {
 		/* Break 8: subtract 2 from ERP unless in a delay slot. */
@@ -687,7 +541,7 @@ keep_debug_flags(unsigned long oldccs, unsigned long oldspc,
 int __init
 cris_init_signal(void)
 {
-	u16* data = (u16*)kmalloc(PAGE_SIZE, GFP_KERNEL);
+	u16* data = kmalloc(PAGE_SIZE, GFP_KERNEL);
 
 	/* This is movu.w __NR_sigreturn, r9; break 13; */
 	data[0] = 0x9c5f;