5 files changed, 66 insertions, 196 deletions

diff --git a/arch/microblaze/kernel/entry-nommu.S b/arch/microblaze/kernel/entry-nommu.S
index 1fce6b803f5..9083d85376a 100644
--- a/arch/microblaze/kernel/entry-nommu.S
+++ b/arch/microblaze/kernel/entry-nommu.S
@@ -551,30 +551,22 @@ no_work_pending:
 	rtid	r14, 0
 	nop
 
-sys_vfork_wrapper:
-	brid	sys_vfork
+sys_vfork:
+	brid	microblaze_vfork
 	addk	r5, r1, r0
 
-sys_clone_wrapper:
-	brid	sys_clone
+sys_clone:
+	brid	microblaze_clone
 	addk	r7, r1, r0
 
-sys_execve_wrapper:
-	brid	sys_execve
+sys_execve:
+	brid	microblaze_execve
 	addk	r8, r1, r0
 
-sys_sigreturn_wrapper:
-	brid	sys_sigreturn
-	addk	r5, r1, r0
-
 sys_rt_sigreturn_wrapper:
 	brid	sys_rt_sigreturn
 	addk	r5, r1, r0
 
-sys_sigsuspend_wrapper:
-	brid	sys_rt_sigsuspend
-	addk	r6, r1, r0
-
 sys_rt_sigsuspend_wrapper:
 	brid	sys_rt_sigsuspend
 	addk	r7, r1, r0
diff --git a/arch/microblaze/kernel/entry.S b/arch/microblaze/kernel/entry.S
index 91a0e7b185d..c7353e79f4a 100644
--- a/arch/microblaze/kernel/entry.S
+++ b/arch/microblaze/kernel/entry.S
@@ -429,12 +429,11 @@ C_ENTRY(ret_from_fork):
 	brid	ret_from_trap;	/* Do normal trap return */
 	nop;
 
-C_ENTRY(sys_vfork_wrapper):
+C_ENTRY(sys_vfork):
+	brid	microblaze_vfork	/* Do real work (tail-call) */
 	la	r5, r1, PTO
-	brid	sys_vfork	/* Do real work (tail-call) */
-	nop
 
-C_ENTRY(sys_clone_wrapper):
+C_ENTRY(sys_clone):
 	bnei	r6, 1f;			/* See if child SP arg (arg 1) is 0. */
 	lwi	r6, r1, PTO+PT_R1;	/* If so, use paret's stack ptr */
 1:	la	r7, r1, PTO;			/* Arg 2: parent context */
@@ -444,20 +443,9 @@ C_ENTRY(sys_clone_wrapper):
 	brid	do_fork		/* Do real work (tail-call) */
 	nop;
 
-C_ENTRY(sys_execve_wrapper):
+C_ENTRY(sys_execve):
 	la	r8, r1, PTO;		/* add user context as 4th arg */
-	brid	sys_execve;	/* Do real work (tail-call).*/
-	nop;
-
-C_ENTRY(sys_sigsuspend_wrapper):
-	swi	r3, r1, PTO+PT_R3; /* restore saved r3, r4 registers */
-	swi	r4, r1, PTO+PT_R4;
-	la	r6, r1, PTO;		/* add user context as 2nd arg */
-	bralid	r15, sys_sigsuspend; /* Do real work.*/
-	nop;
-	lwi	r3, r1, PTO+PT_R3; /* restore saved r3, r4 registers */
-	lwi	r4, r1, PTO+PT_R4;
-	bri ret_from_trap /* fall through will not work here due to align */
+	brid	microblaze_execve;	/* Do real work (tail-call).*/
 	nop;
 
 C_ENTRY(sys_rt_sigsuspend_wrapper):
@@ -471,18 +459,6 @@ C_ENTRY(sys_rt_sigsuspend_wrapper):
 	bri ret_from_trap /* fall through will not work here due to align */
 	nop;
 
-
-C_ENTRY(sys_sigreturn_wrapper):
-	swi	r3, r1, PTO+PT_R3; /* restore saved r3, r4 registers */
-	swi	r4, r1, PTO+PT_R4;
-	la	r5, r1, PTO;		/* add user context as 1st arg */
-	brlid	r15, sys_sigreturn;	/* Do real work.*/
-	nop;
-	lwi	r3, r1, PTO+PT_R3; /* restore saved r3, r4 registers */
-	lwi	r4, r1, PTO+PT_R4;
-	bri ret_from_trap /* fall through will not work here due to align */
-	nop;
-
 C_ENTRY(sys_rt_sigreturn_wrapper):
 	swi	r3, r1, PTO+PT_R3; /* restore saved r3, r4 registers */
 	swi	r4, r1, PTO+PT_R4;
diff --git a/arch/microblaze/kernel/signal.c b/arch/microblaze/kernel/signal.c
index 4c0e6521b11..493819c25fb 100644
--- a/arch/microblaze/kernel/signal.c
+++ b/arch/microblaze/kernel/signal.c
@@ -45,91 +45,8 @@
 
 asmlinkage int do_signal(struct pt_regs *regs, sigset_t *oldset, int in_sycall);
 
-/*
- * Atomically swap in the new signal mask, and wait for a signal.
- */
-asmlinkage int
-sys_sigsuspend(old_sigset_t mask, 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->r3 = -EINTR;
-	while (1) {
-		current->state = TASK_INTERRUPTIBLE;
-		schedule();
-		if (do_signal(regs, &saveset, 1))
-			return -EINTR;
-	}
-}
-
-asmlinkage int
-sys_rt_sigsuspend(sigset_t __user *unewset, size_t sigsetsize,
-		struct pt_regs *regs)
-{
-	sigset_t saveset, newset;
-
-	/* XXX: Don't preclude handling different sized sigset_t's. */
-	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->r3 = -EINTR;
-	while (1) {
-		current->state = TASK_INTERRUPTIBLE;
-		schedule();
-		if (do_signal(regs, &saveset, 1))
-			return -EINTR;
-	}
-}
-
-asmlinkage int
-sys_sigaction(int sig, const struct old_sigaction *act,
-		struct old_sigaction *oact)
-{
-	struct k_sigaction new_ka, old_ka;
-	int ret;
-
-	if (act) {
-		old_sigset_t mask;
-		if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
-			__get_user(new_ka.sa.sa_handler, &act->sa_handler) ||
-			__get_user(new_ka.sa.sa_restorer, &act->sa_restorer))
-			return -EFAULT;
-		__get_user(new_ka.sa.sa_flags, &act->sa_flags);
-		__get_user(mask, &act->sa_mask);
-		siginitset(&new_ka.sa.sa_mask, mask);
-	}
 
-	ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
-
-	if (!ret && oact) {
-		if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
-			__put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||
-			__put_user(old_ka.sa.sa_restorer, &oact->sa_restorer))
-			return -EFAULT;
-		__put_user(old_ka.sa.sa_flags, &oact->sa_flags);
-		__put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask);
-	}
-
-	return ret;
-}
-
-asmlinkage int
+asmlinkage long
 sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss,
 		struct pt_regs *regs)
 {
@@ -139,7 +56,6 @@ sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss,
 /*
  * Do a signal return; undo the signal stack.
  */
-
 struct sigframe {
 	struct sigcontext sc;
 	unsigned long extramask[_NSIG_WORDS-1];
@@ -176,40 +92,7 @@ static int restore_sigcontext(struct pt_regs *regs,
 	return err;
 }
 
-asmlinkage int sys_sigreturn(struct pt_regs *regs)
-{
-	struct sigframe *frame =
-			(struct sigframe *)(regs->r1 + STATE_SAVE_ARG_SPACE);
-
-	sigset_t set;
-	int rval;
-
-	if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
-		goto badframe;
-
-	if (__get_user(set.sig[0], &frame->sc.oldmask)
-		|| (_NSIG_WORDS > 1
-		&& __copy_from_user(&set.sig[1], &frame->extramask,
-					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);
-
-	if (restore_sigcontext(regs, &frame->sc, &rval))
-		goto badframe;
-	return rval;
-
-badframe:
-	force_sig(SIGSEGV, current);
-	return 0;
-}
-
-asmlinkage int sys_rt_sigreturn(struct pt_regs *regs)
+asmlinkage long sys_rt_sigreturn(struct pt_regs *regs)
 {
 	struct rt_sigframe __user *frame =
 		(struct rt_sigframe __user *)(regs->r1 + STATE_SAVE_ARG_SPACE);
@@ -324,21 +207,17 @@ static void setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
 	/* Set up to return from userspace. If provided, use a stub
 	 already in userspace. */
 	/* minus 8 is offset to cater for "rtsd r15,8" */
-	if (ka->sa.sa_flags & SA_RESTORER) {
-		regs->r15 = ((unsigned long)ka->sa.sa_restorer)-8;
-	} else {
-		/* addi r12, r0, __NR_sigreturn */
-		err |= __put_user(0x31800000 | __NR_rt_sigreturn ,
-				frame->tramp + 0);
-		/* brki r14, 0x8 */
-		err |= __put_user(0xb9cc0008, frame->tramp + 1);
-
-		/* Return from sighandler will jump to the tramp.
-		 Negative 8 offset because return is rtsd r15, 8 */
-		regs->r15 = ((unsigned long)frame->tramp)-8;
-
-		__invalidate_cache_sigtramp((unsigned long)frame->tramp);
-	}
+	/* addi r12, r0, __NR_sigreturn */
+	err |= __put_user(0x31800000 | __NR_rt_sigreturn ,
+			frame->tramp + 0);
+	/* brki r14, 0x8 */
+	err |= __put_user(0xb9cc0008, frame->tramp + 1);
+
+	/* Return from sighandler will jump to the tramp.
+	 Negative 8 offset because return is rtsd r15, 8 */
+	regs->r15 = ((unsigned long)frame->tramp)-8;
+
+	__invalidate_cache_sigtramp((unsigned long)frame->tramp);
 
 	if (err)
 		goto give_sigsegv;
@@ -405,7 +284,7 @@ do_restart:
  * OK, we're invoking a handler
  */
 
-static void
+static int
 handle_signal(unsigned long sig, struct k_sigaction *ka,
 		siginfo_t *info, sigset_t *oldset, struct pt_regs *regs)
 {
@@ -426,6 +305,7 @@ handle_signal(unsigned long sig, struct k_sigaction *ka,
 		recalc_sigpending();
 		spin_unlock_irq(&current->sighand->siglock);
 	}
+	return 1;
 }
 
 /*
@@ -456,7 +336,9 @@ int do_signal(struct pt_regs *regs, sigset_t *oldset, int in_syscall)
 	if (kernel_mode(regs))
 		return 1;
 
-	if (!oldset)
+	if (current_thread_info()->status & TS_RESTORE_SIGMASK)
+		oldset = &current->saved_sigmask;
+	else
 		oldset = &current->blocked;
 
 	signr = get_signal_to_deliver(&info, &ka, regs, NULL);
@@ -464,13 +346,31 @@ int do_signal(struct pt_regs *regs, sigset_t *oldset, int in_syscall)
 		/* Whee! Actually deliver the signal. */
 		if (in_syscall)
 			handle_restart(regs, &ka, 1);
-		handle_signal(signr, &ka, &info, oldset, regs);
+		if (handle_signal(signr, &ka, &info, oldset, regs)) {
+			/*
+			 * A signal was successfully delivered; the saved
+			 * sigmask will have been stored in the signal frame,
+			 * and will be restored by sigreturn, so we can simply
+			 * clear the TS_RESTORE_SIGMASK flag.
+			 */
+			current_thread_info()->status &=
+			    ~TS_RESTORE_SIGMASK;
+		}
 		return 1;
 	}
 
 	if (in_syscall)
 		handle_restart(regs, NULL, 0);
 
+	/*
+	 * If there's no signal to deliver, we just put the saved sigmask
+	 * back.
+	 */
+	if (current_thread_info()->status & TS_RESTORE_SIGMASK) {
+		current_thread_info()->status &= ~TS_RESTORE_SIGMASK;
+		sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
+	}
+
 	/* Did we come from a system call? */
 	return 0;
 }
diff --git a/arch/microblaze/kernel/sys_microblaze.c b/arch/microblaze/kernel/sys_microblaze.c
index 31905ff590b..8c9ebac5da1 100644
--- a/arch/microblaze/kernel/sys_microblaze.c
+++ b/arch/microblaze/kernel/sys_microblaze.c
@@ -39,7 +39,7 @@
  *
  * This is really horribly ugly. This will be remove with new toolchain.
  */
-asmlinkage int
+asmlinkage long
 sys_ipc(uint call, int first, int second, int third, void *ptr, long fifth)
 {
 	int version, ret;
@@ -134,20 +134,20 @@ sys_ipc(uint call, int first, int second, int third, void *ptr, long fifth)
 	return ret;
 }
 
-asmlinkage int sys_vfork(struct pt_regs *regs)
+asmlinkage long microblaze_vfork(struct pt_regs *regs)
 {
 	return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs->r1,
 						regs, 0, NULL, NULL);
 }
 
-asmlinkage int sys_clone(int flags, unsigned long stack, struct pt_regs *regs)
+asmlinkage long microblaze_clone(int flags, unsigned long stack, struct pt_regs *regs)
 {
 	if (!stack)
 		stack = regs->r1;
 	return do_fork(flags, stack, regs, 0, NULL, NULL);
 }
 
-asmlinkage int sys_execve(char __user *filenamei, char __user *__user *argv,
+asmlinkage long microblaze_execve(char __user *filenamei, char __user *__user *argv,
 			char __user *__user *envp, struct pt_regs *regs)
 {
 	int error;
@@ -163,8 +163,8 @@ out:
 	return error;
 }
 
-asmlinkage unsigned long
-sys_mmap2(unsigned long addr, size_t len,
+asmlinkage long
+sys_mmap2(unsigned long addr, unsigned long len,
 	unsigned long prot, unsigned long flags,
 	unsigned long fd, unsigned long pgoff)
 {
@@ -189,18 +189,18 @@ out:
 	return ret;
 }
 
-asmlinkage unsigned long sys_mmap(unsigned long addr, size_t len,
+asmlinkage long sys_mmap(unsigned long addr, unsigned long len,
 			unsigned long prot, unsigned long flags,
-			unsigned long fd, off_t offset)
+			unsigned long fd, off_t pgoff)
 {
 	int err = -EINVAL;
 
-	if (offset & ~PAGE_MASK) {
+	if (pgoff & ~PAGE_MASK) {
 		printk(KERN_INFO "no pagemask in mmap\r\n");
 		goto out;
 	}
 
-	err = sys_mmap2(addr, len, prot, flags, fd, offset >> PAGE_SHIFT);
+	err = sys_mmap2(addr, len, prot, flags, fd, pgoff >> PAGE_SHIFT);
 out:
 	return err;
 }
diff --git a/arch/microblaze/kernel/syscall_table.S b/arch/microblaze/kernel/syscall_table.S
index 376d1789f7c..31b32a6c5f4 100644
--- a/arch/microblaze/kernel/syscall_table.S
+++ b/arch/microblaze/kernel/syscall_table.S
@@ -15,7 +15,7 @@ ENTRY(sys_call_table)
 	.long sys_creat
 	.long sys_link
 	.long sys_unlink		/* 10 */
-	.long sys_execve_wrapper
+	.long sys_execve
 	.long sys_chdir
 	.long sys_time
 	.long sys_mknod
@@ -71,12 +71,12 @@ ENTRY(sys_call_table)
 	.long sys_getppid
 	.long sys_getpgrp		/* 65 */
 	.long sys_setsid
-	.long sys_sigaction
+	.long sys_ni_syscall		/* sys_sigaction */
 	.long sys_sgetmask
 	.long sys_ssetmask
 	.long sys_setreuid		/* 70 */
 	.long sys_setregid
-	.long sys_sigsuspend_wrapper
+	.long sys_ni_syscall		/* sys_sigsuspend_wrapper */
 	.long sys_sigpending
 	.long sys_sethostname
 	.long sys_setrlimit		/* 75 */
@@ -123,8 +123,8 @@ ENTRY(sys_call_table)
 	.long sys_sysinfo
 	.long sys_ipc
 	.long sys_fsync
-	.long sys_sigreturn_wrapper
-	.long sys_clone_wrapper		/* 120 */
+	.long sys_ni_syscall		/* sys_sigreturn_wrapper */
+	.long sys_clone		/* 120 */
 	.long sys_setdomainname
 	.long sys_newuname
 	.long sys_ni_syscall		/* modify_ldt */
@@ -194,7 +194,7 @@ ENTRY(sys_call_table)
 	.long sys_sendfile
 	.long sys_ni_syscall		/* reserved for streams1 */
 	.long sys_ni_syscall		/* reserved for streams2 */
-	.long sys_vfork_wrapper		/* 190 */
+	.long sys_vfork		/* 190 */
 	.long sys_getrlimit
 	.long sys_mmap2			/* mmap2 */
 	.long sys_truncate64
@@ -369,3 +369,5 @@ ENTRY(sys_call_table)
 	.long sys_ni_syscall
 	.long sys_ni_syscall
 	.long sys_ni_syscall
+	.long sys_rt_tgsigqueueinfo	/* 365 */
+	.long sys_perf_counter_open