Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6:
  sparc: Fix debugger syscall restart interactions.
  sparc: Fix ptrace() detach.
  sparc32: Don't twiddle PT_DTRACE in exec.
  sparc video: remove open boot prom code

1 files changed, 17 insertions, 9 deletions

diff --git a/arch/sparc64/kernel/signal32.c b/arch/sparc64/kernel/signal32.c
index 0f6b7b1..3f19e9a 100644
--- a/arch/sparc64/kernel/signal32.c
+++ b/arch/sparc64/kernel/signal32.c
@@ -269,7 +269,7 @@ void do_sigreturn32(struct pt_regs *regs)
 	regs->tstate |= psr_to_tstate_icc(psr);
 
 	/* Prevent syscall restart.  */
-	pt_regs_clear_trap_type(regs);
+	pt_regs_clear_syscall(regs);
 
 	err |= __get_user(fpu_save, &sf->fpu_save);
 	if (fpu_save)
@@ -355,7 +355,7 @@ asmlinkage void do_rt_sigreturn32(struct pt_regs *regs)
 	regs->tstate |= psr_to_tstate_icc(psr);
 
 	/* Prevent syscall restart.  */
-	pt_regs_clear_trap_type(regs);
+	pt_regs_clear_syscall(regs);
 
 	err |= __get_user(fpu_save, &sf->fpu_save);
 	if (fpu_save)
@@ -768,16 +768,24 @@ static inline void syscall_restart32(unsigned long orig_i0, struct pt_regs *regs
  * mistake.
  */
 void do_signal32(sigset_t *oldset, struct pt_regs * regs,
-		 struct signal_deliver_cookie *cookie)
+		 int restart_syscall, unsigned long orig_i0)
 {
 	struct k_sigaction ka;
 	siginfo_t info;
 	int signr;
 	
-	signr = get_signal_to_deliver(&info, &ka, regs, cookie);
+	signr = get_signal_to_deliver(&info, &ka, regs, NULL);
+
+	/* If the debugger messes with the program counter, it clears
+	 * the "in syscall" bit, directing us to not perform a syscall
+	 * restart.
+	 */
+	if (restart_syscall && !pt_regs_is_syscall(regs))
+		restart_syscall = 0;
+
 	if (signr > 0) {
-		if (cookie->restart_syscall)
-			syscall_restart32(cookie->orig_i0, regs, &ka.sa);
+		if (restart_syscall)
+			syscall_restart32(orig_i0, regs, &ka.sa);
 		handle_signal32(signr, &ka, &info, oldset, regs);
 
 		/* a signal was successfully delivered; the saved
@@ -789,16 +797,16 @@ void do_signal32(sigset_t *oldset, struct pt_regs * regs,
 			clear_thread_flag(TIF_RESTORE_SIGMASK);
 		return;
 	}
-	if (cookie->restart_syscall &&
+	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] = cookie->orig_i0;
+		regs->u_regs[UREG_I0] = orig_i0;
 		regs->tpc -= 4;
 		regs->tnpc -= 4;
 	}
-	if (cookie->restart_syscall &&
+	if (restart_syscall &&
 	    regs->u_regs[UREG_I0] == ERESTART_RESTARTBLOCK) {
 		regs->u_regs[UREG_G1] = __NR_restart_syscall;
 		regs->tpc -= 4;