1 files changed, 0 insertions, 431 deletions

diff --git a/arch/mn10300/kernel/signal.c b/arch/mn10300/kernel/signal.c
deleted file mode 100644
index 2f3cb5734235..000000000000
--- a/arch/mn10300/kernel/signal.c
+++ /dev/null
@@ -1,431 +0,0 @@
-/* MN10300 Signal handling
- *
- * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
- * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public Licence
- * as published by the Free Software Foundation; either version
- * 2 of the Licence, or (at your option) any later version.
- */
-
-#include <linux/sched.h>
-#include <linux/mm.h>
-#include <linux/smp.h>
-#include <linux/kernel.h>
-#include <linux/signal.h>
-#include <linux/errno.h>
-#include <linux/wait.h>
-#include <linux/ptrace.h>
-#include <linux/unistd.h>
-#include <linux/stddef.h>
-#include <linux/tty.h>
-#include <linux/personality.h>
-#include <linux/suspend.h>
-#include <linux/tracehook.h>
-#include <asm/cacheflush.h>
-#include <asm/ucontext.h>
-#include <linux/uaccess.h>
-#include <asm/fpu.h>
-#include "sigframe.h"
-
-#define DEBUG_SIG 0
-
-/*
- * do a signal return; undo the signal stack.
- */
-static int restore_sigcontext(struct pt_regs *regs,
-			      struct sigcontext __user *sc, long *_d0)
-{
-	unsigned int err = 0;
-
-	/* Always make any pending restarted system calls return -EINTR */
-	current->restart_block.fn = do_no_restart_syscall;
-
-	if (is_using_fpu(current))
-		fpu_kill_state(current);
-
-#define COPY(x) err |= __get_user(regs->x, &sc->x)
-	COPY(d1); COPY(d2); COPY(d3);
-	COPY(a0); COPY(a1); COPY(a2); COPY(a3);
-	COPY(e0); COPY(e1); COPY(e2); COPY(e3);
-	COPY(e4); COPY(e5); COPY(e6); COPY(e7);
-	COPY(lar); COPY(lir);
-	COPY(mdr); COPY(mdrq);
-	COPY(mcvf); COPY(mcrl); COPY(mcrh);
-	COPY(sp); COPY(pc);
-#undef COPY
-
-	{
-		unsigned int tmpflags;
-#ifndef CONFIG_MN10300_USING_JTAG
-#define USER_EPSW (EPSW_FLAG_Z | EPSW_FLAG_N | EPSW_FLAG_C | EPSW_FLAG_V | \
-		   EPSW_T | EPSW_nAR)
-#else
-#define USER_EPSW (EPSW_FLAG_Z | EPSW_FLAG_N | EPSW_FLAG_C | EPSW_FLAG_V | \
-		   EPSW_nAR)
-#endif
-		err |= __get_user(tmpflags, &sc->epsw);
-		regs->epsw = (regs->epsw & ~USER_EPSW) |
-		  (tmpflags & USER_EPSW);
-		regs->orig_d0 = -1;		/* disable syscall checks */
-	}
-
-	{
-		struct fpucontext *buf;
-		err |= __get_user(buf, &sc->fpucontext);
-		if (buf) {
-			if (!access_ok(VERIFY_READ, buf, sizeof(*buf)))
-				goto badframe;
-			err |= fpu_restore_sigcontext(buf);
-		}
-	}
-
-	err |= __get_user(*_d0, &sc->d0);
-	return err;
-
-badframe:
-	return 1;
-}
-
-/*
- * standard signal return syscall
- */
-asmlinkage long sys_sigreturn(void)
-{
-	struct sigframe __user *frame;
-	sigset_t set;
-	long d0;
-
-	frame = (struct sigframe __user *) current_frame()->sp;
-	if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
-		goto badframe;
-	if (__get_user(set.sig[0], &frame->sc.oldmask))
-		goto badframe;
-
-	if (_NSIG_WORDS > 1 &&
-	    __copy_from_user(&set.sig[1], &frame->extramask,
-			     sizeof(frame->extramask)))
-		goto badframe;
-
-	set_current_blocked(&set);
-
-	if (restore_sigcontext(current_frame(), &frame->sc, &d0))
-		goto badframe;
-
-	return d0;
-
-badframe:
-	force_sig(SIGSEGV, current);
-	return 0;
-}
-
-/*
- * realtime signal return syscall
- */
-asmlinkage long sys_rt_sigreturn(void)
-{
-	struct rt_sigframe __user *frame;
-	sigset_t set;
-	long d0;
-
-	frame = (struct rt_sigframe __user *) current_frame()->sp;
-	if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
-		goto badframe;
-	if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
-		goto badframe;
-
-	set_current_blocked(&set);
-
-	if (restore_sigcontext(current_frame(), &frame->uc.uc_mcontext, &d0))
-		goto badframe;
-
-	if (restore_altstack(&frame->uc.uc_stack))
-		goto badframe;
-
-	return d0;
-
-badframe:
-	force_sig(SIGSEGV, current);
-	return 0;
-}
-
-/*
- * store the userspace context into a signal frame
- */
-static int setup_sigcontext(struct sigcontext __user *sc,
-			    struct fpucontext *fpuctx,
-			    struct pt_regs *regs,
-			    unsigned long mask)
-{
-	int tmp, err = 0;
-
-#define COPY(x) err |= __put_user(regs->x, &sc->x)
-	COPY(d0); COPY(d1); COPY(d2); COPY(d3);
-	COPY(a0); COPY(a1); COPY(a2); COPY(a3);
-	COPY(e0); COPY(e1); COPY(e2); COPY(e3);
-	COPY(e4); COPY(e5); COPY(e6); COPY(e7);
-	COPY(lar); COPY(lir);
-	COPY(mdr); COPY(mdrq);
-	COPY(mcvf); COPY(mcrl); COPY(mcrh);
-	COPY(sp); COPY(epsw); COPY(pc);
-#undef COPY
-
-	tmp = fpu_setup_sigcontext(fpuctx);
-	if (tmp < 0)
-		err = 1;
-	else
-		err |= __put_user(tmp ? fpuctx : NULL, &sc->fpucontext);
-
-	/* non-iBCS2 extensions.. */
-	err |= __put_user(mask, &sc->oldmask);
-
-	return err;
-}
-
-/*
- * determine which stack to use..
- */
-static inline void __user *get_sigframe(struct ksignal *ksig,
-					struct pt_regs *regs,
-					size_t frame_size)
-{
-	unsigned long sp = sigsp(regs->sp, ksig);
-
-	return (void __user *) ((sp - frame_size) & ~7UL);
-}
-
-/*
- * set up a normal signal frame
- */
-static int setup_frame(struct ksignal *ksig, sigset_t *set,
-		       struct pt_regs *regs)
-{
-	struct sigframe __user *frame;
-	int sig = ksig->sig;
-
-	frame = get_sigframe(ksig, regs, sizeof(*frame));
-
-	if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
-		return -EFAULT;
-
-	if (__put_user(sig, &frame->sig) < 0 ||
-	    __put_user(&frame->sc, &frame->psc) < 0)
-		return -EFAULT;
-
-	if (setup_sigcontext(&frame->sc, &frame->fpuctx, regs, set->sig[0]))
-		return -EFAULT;
-
-	if (_NSIG_WORDS > 1) {
-		if (__copy_to_user(frame->extramask, &set->sig[1],
-				   sizeof(frame->extramask)))
-			return -EFAULT;
-	}
-
-	/* set up to return from userspace.  If provided, use a stub already in
-	 * userspace */
-	if (ksig->ka.sa.sa_flags & SA_RESTORER) {
-		if (__put_user(ksig->ka.sa.sa_restorer, &frame->pretcode))
-			return -EFAULT;
-	} else {
-		if (__put_user((void (*)(void))frame->retcode,
-			       &frame->pretcode))
-			return -EFAULT;
-		/* this is mov $,d0; syscall 0 */
-		if (__put_user(0x2c, (char *)(frame->retcode + 0)) ||
-		    __put_user(__NR_sigreturn, (char *)(frame->retcode + 1)) ||
-		    __put_user(0x00, (char *)(frame->retcode + 2)) ||
-		    __put_user(0xf0, (char *)(frame->retcode + 3)) ||
-		    __put_user(0xe0, (char *)(frame->retcode + 4)))
-			return -EFAULT;
-		flush_icache_range((unsigned long) frame->retcode,
-				   (unsigned long) frame->retcode + 5);
-	}
-
-	/* set up registers for signal handler */
-	regs->sp = (unsigned long) frame;
-	regs->pc = (unsigned long) ksig->ka.sa.sa_handler;
-	regs->d0 = sig;
-	regs->d1 = (unsigned long) &frame->sc;
-
-#if DEBUG_SIG
-	printk(KERN_DEBUG "SIG deliver %d (%s:%d): sp=%p pc=%lx ra=%p\n",
-	       sig, current->comm, current->pid, frame, regs->pc,
-	       frame->pretcode);
-#endif
-
-	return 0;
-}
-
-/*
- * set up a realtime signal frame
- */
-static int setup_rt_frame(struct ksignal *ksig, sigset_t *set,
-			  struct pt_regs *regs)
-{
-	struct rt_sigframe __user *frame;
-	int sig = ksig->sig;
-
-	frame = get_sigframe(ksig, regs, sizeof(*frame));
-
-	if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
-		return -EFAULT;
-
-	if (__put_user(sig, &frame->sig) ||
-	    __put_user(&frame->info, &frame->pinfo) ||
-	    __put_user(&frame->uc, &frame->puc) ||
-	    copy_siginfo_to_user(&frame->info, &ksig->info))
-		return -EFAULT;
-
-	/* create the ucontext.  */
-	if (__put_user(0, &frame->uc.uc_flags) ||
-	    __put_user(0, &frame->uc.uc_link) ||
-	    __save_altstack(&frame->uc.uc_stack, regs->sp) ||
-	    setup_sigcontext(&frame->uc.uc_mcontext,
-			     &frame->fpuctx, regs, set->sig[0]) ||
-	    __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set)))
-		return -EFAULT;
-
-	/* set up to return from userspace.  If provided, use a stub already in
-	 * userspace */
-	if (ksig->ka.sa.sa_flags & SA_RESTORER) {
-		if (__put_user(ksig->ka.sa.sa_restorer, &frame->pretcode))
-			return -EFAULT;
-
-	} else {
-		if (__put_user((void(*)(void))frame->retcode,
-			       &frame->pretcode) ||
-		    /* This is mov $,d0; syscall 0 */
-		    __put_user(0x2c, (char *)(frame->retcode + 0)) ||
-		    __put_user(__NR_rt_sigreturn,
-			       (char *)(frame->retcode + 1)) ||
-		    __put_user(0x00, (char *)(frame->retcode + 2)) ||
-		    __put_user(0xf0, (char *)(frame->retcode + 3)) ||
-		    __put_user(0xe0, (char *)(frame->retcode + 4)))
-			return -EFAULT;
-
-		flush_icache_range((u_long) frame->retcode,
-				   (u_long) frame->retcode + 5);
-	}
-
-	/* Set up registers for signal handler */
-	regs->sp = (unsigned long) frame;
-	regs->pc = (unsigned long) ksig->ka.sa.sa_handler;
-	regs->d0 = sig;
-	regs->d1 = (long) &frame->info;
-
-#if DEBUG_SIG
-	printk(KERN_DEBUG "SIG deliver %d (%s:%d): sp=%p pc=%lx ra=%p\n",
-	       sig, current->comm, current->pid, frame, regs->pc,
-	       frame->pretcode);
-#endif
-
-	return 0;
-}
-
-static inline void stepback(struct pt_regs *regs)
-{
-	regs->pc -= 2;
-	regs->orig_d0 = -1;
-}
-
-/*
- * handle the actual delivery of a signal to userspace
- */
-static int handle_signal(struct ksignal *ksig, struct pt_regs *regs)
-{
-	sigset_t *oldset = sigmask_to_save();
-	int ret;
-
-	/* Are we from a system call? */
-	if (regs->orig_d0 >= 0) {
-		/* If so, check system call restarting.. */
-		switch (regs->d0) {
-		case -ERESTART_RESTARTBLOCK:
-		case -ERESTARTNOHAND:
-			regs->d0 = -EINTR;
-			break;
-
-		case -ERESTARTSYS:
-			if (!(ksig->ka.sa.sa_flags & SA_RESTART)) {
-				regs->d0 = -EINTR;
-				break;
-			}
-
-			/* fallthrough */
-		case -ERESTARTNOINTR:
-			regs->d0 = regs->orig_d0;
-			stepback(regs);
-		}
-	}
-
-	/* Set up the stack frame */
-	if (ksig->ka.sa.sa_flags & SA_SIGINFO)
-		ret = setup_rt_frame(ksig, oldset, regs);
-	else
-		ret = setup_frame(ksig, oldset, regs);
-
-	signal_setup_done(ret, ksig, test_thread_flag(TIF_SINGLESTEP));
-	return 0;
-}
-
-/*
- * handle a potential signal
- */
-static void do_signal(struct pt_regs *regs)
-{
-	struct ksignal ksig;
-
-	if (get_signal(&ksig)) {
-		handle_signal(&ksig, regs);
-		return;
-	}
-
-	/* did we come from a system call? */
-	if (regs->orig_d0 >= 0) {
-		/* restart the system call - no handlers present */
-		switch (regs->d0) {
-		case -ERESTARTNOHAND:
-		case -ERESTARTSYS:
-		case -ERESTARTNOINTR:
-			regs->d0 = regs->orig_d0;
-			stepback(regs);
-			break;
-
-		case -ERESTART_RESTARTBLOCK:
-			regs->d0 = __NR_restart_syscall;
-			stepback(regs);
-			break;
-		}
-	}
-
-	/* if there's no signal to deliver, we just put the saved sigmask
-	 * back */
-	restore_saved_sigmask();
-}
-
-/*
- * notification of userspace execution resumption
- * - triggered by current->work.notify_resume
- */
-asmlinkage void do_notify_resume(struct pt_regs *regs, u32 thread_info_flags)
-{
-	/* Pending single-step? */
-	if (thread_info_flags & _TIF_SINGLESTEP) {
-#ifndef CONFIG_MN10300_USING_JTAG
-		regs->epsw |= EPSW_T;
-		clear_thread_flag(TIF_SINGLESTEP);
-#else
-		BUG(); /* no h/w single-step if using JTAG unit */
-#endif
-	}
-
-	/* deal with pending signal delivery */
-	if (thread_info_flags & _TIF_SIGPENDING)
-		do_signal(regs);
-
-	if (thread_info_flags & _TIF_NOTIFY_RESUME) {
-		clear_thread_flag(TIF_NOTIFY_RESUME);
-		tracehook_notify_resume(current_frame());
-	}
-}