m68k: merge the MMU and non-MMU signal.c code

The MMU (signal_mm.c) and non-MMU (signal_no.c) versions of the m68k
architecture signal handling code are very similar. Most of their code is
the same.

Merge the two back into a single signal.c, and move some of the code around
inside the file to minimize the number of #ifdefs required. Specificially
we can group out the CONFIG_FPU and the CONFIG_MMU code. We end up needing
a few other "#ifdef CONFIG_MMU" as well, but not too many.

Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>

1 files changed, 0 insertions, 1115 deletions

diff --git a/arch/m68k/kernel/signal_mm.c b/arch/m68k/kernel/signal_mm.c
deleted file mode 100644
index cb856f9da655..000000000000
--- a/arch/m68k/kernel/signal_mm.c
+++ /dev/null
@@ -1,1115 +0,0 @@
-/*
- *  linux/arch/m68k/kernel/signal.c
- *
- *  Copyright (C) 1991, 1992  Linus Torvalds
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file COPYING in the main directory of this archive
- * for more details.
- */
-
-/*
- * Linux/m68k support by Hamish Macdonald
- *
- * 68060 fixes by Jesper Skov
- *
- * 1997-12-01  Modified for POSIX.1b signals by Andreas Schwab
- *
- * mathemu support by Roman Zippel
- *  (Note: fpstate in the signal context is completely ignored for the emulator
- *         and the internal floating point format is put on stack)
- */
-
-/*
- * ++roman (07/09/96): implemented signal stacks (specially for tosemu on
- * Atari :-) Current limitation: Only one sigstack can be active at one time.
- * If a second signal with SA_ONSTACK set arrives while working on a sigstack,
- * SA_ONSTACK is ignored. This behaviour avoids lots of trouble with nested
- * signal handlers!
- */
-
-#include <linux/sched.h>
-#include <linux/mm.h>
-#include <linux/kernel.h>
-#include <linux/signal.h>
-#include <linux/syscalls.h>
-#include <linux/errno.h>
-#include <linux/wait.h>
-#include <linux/ptrace.h>
-#include <linux/unistd.h>
-#include <linux/stddef.h>
-#include <linux/highuid.h>
-#include <linux/personality.h>
-#include <linux/tty.h>
-#include <linux/binfmts.h>
-#include <linux/module.h>
-
-#include <asm/setup.h>
-#include <asm/uaccess.h>
-#include <asm/pgtable.h>
-#include <asm/traps.h>
-#include <asm/ucontext.h>
-
-#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
-
-static const int frame_extra_sizes[16] = {
-  [1]	= -1, /* sizeof(((struct frame *)0)->un.fmt1), */
-  [2]	= sizeof(((struct frame *)0)->un.fmt2),
-  [3]	= sizeof(((struct frame *)0)->un.fmt3),
-#ifdef CONFIG_COLDFIRE
-  [4]	= 0,
-#else
-  [4]	= sizeof(((struct frame *)0)->un.fmt4),
-#endif
-  [5]	= -1, /* sizeof(((struct frame *)0)->un.fmt5), */
-  [6]	= -1, /* sizeof(((struct frame *)0)->un.fmt6), */
-  [7]	= sizeof(((struct frame *)0)->un.fmt7),
-  [8]	= -1, /* sizeof(((struct frame *)0)->un.fmt8), */
-  [9]	= sizeof(((struct frame *)0)->un.fmt9),
-  [10]	= sizeof(((struct frame *)0)->un.fmta),
-  [11]	= sizeof(((struct frame *)0)->un.fmtb),
-  [12]	= -1, /* sizeof(((struct frame *)0)->un.fmtc), */
-  [13]	= -1, /* sizeof(((struct frame *)0)->un.fmtd), */
-  [14]	= -1, /* sizeof(((struct frame *)0)->un.fmte), */
-  [15]	= -1, /* sizeof(((struct frame *)0)->un.fmtf), */
-};
-
-int handle_kernel_fault(struct pt_regs *regs)
-{
-	const struct exception_table_entry *fixup;
-	struct pt_regs *tregs;
-
-	/* Are we prepared to handle this kernel fault? */
-	fixup = search_exception_tables(regs->pc);
-	if (!fixup)
-		return 0;
-
-	/* Create a new four word stack frame, discarding the old one. */
-	regs->stkadj = frame_extra_sizes[regs->format];
-	tregs =	(struct pt_regs *)((long)regs + regs->stkadj);
-	tregs->vector = regs->vector;
-#ifdef CONFIG_COLDFIRE
-	tregs->format = 4;
-#else
-	tregs->format = 0;
-#endif
-	tregs->pc = fixup->fixup;
-	tregs->sr = regs->sr;
-
-	return 1;
-}
-
-/*
- * Atomically swap in the new signal mask, and wait for a signal.
- */
-asmlinkage int
-sys_sigsuspend(int unused0, int unused1, old_sigset_t mask)
-{
-	mask &= _BLOCKABLE;
-	spin_lock_irq(&current->sighand->siglock);
-	current->saved_sigmask = current->blocked;
-	siginitset(&current->blocked, mask);
-	recalc_sigpending();
-	spin_unlock_irq(&current->sighand->siglock);
-
-	current->state = TASK_INTERRUPTIBLE;
-	schedule();
-	set_restore_sigmask();
-
-	return -ERESTARTNOHAND;
-}
-
-asmlinkage int
-sys_sigaction(int sig, const struct old_sigaction __user *act,
-	      struct old_sigaction __user *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) ||
-		    __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
-		    __get_user(mask, &act->sa_mask))
-			return -EFAULT;
-		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) ||
-		    __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
-		    __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
-			return -EFAULT;
-	}
-
-	return ret;
-}
-
-asmlinkage int
-sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss)
-{
-	return do_sigaltstack(uss, uoss, rdusp());
-}
-
-
-/*
- * Do a signal return; undo the signal stack.
- *
- * Keep the return code on the stack quadword aligned!
- * That makes the cache flush below easier.
- */
-
-struct sigframe
-{
-	char __user *pretcode;
-	int sig;
-	int code;
-	struct sigcontext __user *psc;
-	char retcode[8];
-	unsigned long extramask[_NSIG_WORDS-1];
-	struct sigcontext sc;
-};
-
-struct rt_sigframe
-{
-	char __user *pretcode;
-	int sig;
-	struct siginfo __user *pinfo;
-	void __user *puc;
-	char retcode[8];
-	struct siginfo info;
-	struct ucontext uc;
-};
-
-
-static unsigned char fpu_version;	/* version number of fpu, set by setup_frame */
-
-static inline int restore_fpu_state(struct sigcontext *sc)
-{
-	int err = 1;
-
-	if (FPU_IS_EMU) {
-	    /* restore registers */
-	    memcpy(current->thread.fpcntl, sc->sc_fpcntl, 12);
-	    memcpy(current->thread.fp, sc->sc_fpregs, 24);
-	    return 0;
-	}
-
-	if (CPU_IS_060 ? sc->sc_fpstate[2] : sc->sc_fpstate[0]) {
-	    /* Verify the frame format.  */
-	    if (!(CPU_IS_060 || CPU_IS_COLDFIRE) &&
-		 (sc->sc_fpstate[0] != fpu_version))
-		goto out;
-	    if (CPU_IS_020_OR_030) {
-		if (m68k_fputype & FPU_68881 &&
-		    !(sc->sc_fpstate[1] == 0x18 || sc->sc_fpstate[1] == 0xb4))
-		    goto out;
-		if (m68k_fputype & FPU_68882 &&
-		    !(sc->sc_fpstate[1] == 0x38 || sc->sc_fpstate[1] == 0xd4))
-		    goto out;
-	    } else if (CPU_IS_040) {
-		if (!(sc->sc_fpstate[1] == 0x00 ||
-                      sc->sc_fpstate[1] == 0x28 ||
-                      sc->sc_fpstate[1] == 0x60))
-		    goto out;
-	    } else if (CPU_IS_060) {
-		if (!(sc->sc_fpstate[3] == 0x00 ||
-                      sc->sc_fpstate[3] == 0x60 ||
-		      sc->sc_fpstate[3] == 0xe0))
-		    goto out;
-	    } else if (CPU_IS_COLDFIRE) {
-		if (!(sc->sc_fpstate[0] == 0x00 ||
-		      sc->sc_fpstate[0] == 0x05 ||
-		      sc->sc_fpstate[0] == 0xe5))
-		    goto out;
-	    } else
-		goto out;
-
-	    if (CPU_IS_COLDFIRE) {
-		__asm__ volatile ("fmovemd %0,%%fp0-%%fp1\n\t"
-				  "fmovel %1,%%fpcr\n\t"
-				  "fmovel %2,%%fpsr\n\t"
-				  "fmovel %3,%%fpiar"
-				  : /* no outputs */
-				  : "m" (sc->sc_fpregs[0]),
-				    "m" (sc->sc_fpcntl[0]),
-				    "m" (sc->sc_fpcntl[1]),
-				    "m" (sc->sc_fpcntl[2]));
-	    } else {
-		__asm__ volatile (".chip 68k/68881\n\t"
-				  "fmovemx %0,%%fp0-%%fp1\n\t"
-				  "fmoveml %1,%%fpcr/%%fpsr/%%fpiar\n\t"
-				  ".chip 68k"
-				  : /* no outputs */
-				  : "m" (*sc->sc_fpregs),
-				    "m" (*sc->sc_fpcntl));
-	    }
-	}
-
-	if (CPU_IS_COLDFIRE) {
-		__asm__ volatile ("frestore %0" : : "m" (*sc->sc_fpstate));
-	} else {
-		__asm__ volatile (".chip 68k/68881\n\t"
-				  "frestore %0\n\t"
-				  ".chip 68k"
-				  : : "m" (*sc->sc_fpstate));
-	}
-	err = 0;
-
-out:
-	return err;
-}
-
-#define FPCONTEXT_SIZE	216
-#define uc_fpstate	uc_filler[0]
-#define uc_formatvec	uc_filler[FPCONTEXT_SIZE/4]
-#define uc_extra	uc_filler[FPCONTEXT_SIZE/4+1]
-
-static inline int rt_restore_fpu_state(struct ucontext __user *uc)
-{
-	unsigned char fpstate[FPCONTEXT_SIZE];
-	int context_size = CPU_IS_060 ? 8 : (CPU_IS_COLDFIRE ? 12 : 0);
-	fpregset_t fpregs;
-	int err = 1;
-
-	if (FPU_IS_EMU) {
-		/* restore fpu control register */
-		if (__copy_from_user(current->thread.fpcntl,
-				uc->uc_mcontext.fpregs.f_fpcntl, 12))
-			goto out;
-		/* restore all other fpu register */
-		if (__copy_from_user(current->thread.fp,
-				uc->uc_mcontext.fpregs.f_fpregs, 96))
-			goto out;
-		return 0;
-	}
-
-	if (__get_user(*(long *)fpstate, (long __user *)&uc->uc_fpstate))
-		goto out;
-	if (CPU_IS_060 ? fpstate[2] : fpstate[0]) {
-		if (!(CPU_IS_060 || CPU_IS_COLDFIRE))
-			context_size = fpstate[1];
-		/* Verify the frame format.  */
-		if (!(CPU_IS_060 || CPU_IS_COLDFIRE) &&
-		     (fpstate[0] != fpu_version))
-			goto out;
-		if (CPU_IS_020_OR_030) {
-			if (m68k_fputype & FPU_68881 &&
-			    !(context_size == 0x18 || context_size == 0xb4))
-				goto out;
-			if (m68k_fputype & FPU_68882 &&
-			    !(context_size == 0x38 || context_size == 0xd4))
-				goto out;
-		} else if (CPU_IS_040) {
-			if (!(context_size == 0x00 ||
-			      context_size == 0x28 ||
-			      context_size == 0x60))
-				goto out;
-		} else if (CPU_IS_060) {
-			if (!(fpstate[3] == 0x00 ||
-			      fpstate[3] == 0x60 ||
-			      fpstate[3] == 0xe0))
-				goto out;
-		} else if (CPU_IS_COLDFIRE) {
-			if (!(fpstate[3] == 0x00 ||
-			      fpstate[3] == 0x05 ||
-			      fpstate[3] == 0xe5))
-				goto out;
-		} else
-			goto out;
-		if (__copy_from_user(&fpregs, &uc->uc_mcontext.fpregs,
-				     sizeof(fpregs)))
-			goto out;
-
-		if (CPU_IS_COLDFIRE) {
-			__asm__ volatile ("fmovemd %0,%%fp0-%%fp7\n\t"
-					  "fmovel %1,%%fpcr\n\t"
-					  "fmovel %2,%%fpsr\n\t"
-					  "fmovel %3,%%fpiar"
-					  : /* no outputs */
-					  : "m" (fpregs.f_fpregs[0]),
-					    "m" (fpregs.f_fpcntl[0]),
-					    "m" (fpregs.f_fpcntl[1]),
-					    "m" (fpregs.f_fpcntl[2]));
-		} else {
-			__asm__ volatile (".chip 68k/68881\n\t"
-					  "fmovemx %0,%%fp0-%%fp7\n\t"
-					  "fmoveml %1,%%fpcr/%%fpsr/%%fpiar\n\t"
-					  ".chip 68k"
-					  : /* no outputs */
-					  : "m" (*fpregs.f_fpregs),
-					    "m" (*fpregs.f_fpcntl));
-		}
-	}
-	if (context_size &&
-	    __copy_from_user(fpstate + 4, (long __user *)&uc->uc_fpstate + 1,
-			     context_size))
-		goto out;
-
-	if (CPU_IS_COLDFIRE) {
-		__asm__ volatile ("frestore %0" : : "m" (*fpstate));
-	} else {
-		__asm__ volatile (".chip 68k/68881\n\t"
-				  "frestore %0\n\t"
-				  ".chip 68k"
-				  : : "m" (*fpstate));
-	}
-	err = 0;
-
-out:
-	return err;
-}
-
-static int mangle_kernel_stack(struct pt_regs *regs, int formatvec,
-			       void __user *fp)
-{
-	int fsize = frame_extra_sizes[formatvec >> 12];
-	if (fsize < 0) {
-		/*
-		 * user process trying to return with weird frame format
-		 */
-#ifdef DEBUG
-		printk("user process returning with weird frame format\n");
-#endif
-		return 1;
-	}
-	if (!fsize) {
-		regs->format = formatvec >> 12;
-		regs->vector = formatvec & 0xfff;
-	} else {
-		struct switch_stack *sw = (struct switch_stack *)regs - 1;
-		unsigned long buf[fsize / 2]; /* yes, twice as much */
-
-		/* that'll make sure that expansion won't crap over data */
-		if (copy_from_user(buf + fsize / 4, fp, fsize))
-			return 1;
-
-		/* point of no return */
-		regs->format = formatvec >> 12;
-		regs->vector = formatvec & 0xfff;
-#define frame_offset (sizeof(struct pt_regs)+sizeof(struct switch_stack))
-		__asm__ __volatile__ (
-#ifdef CONFIG_COLDFIRE
-			 "   movel %0,%/sp\n\t"
-			 "   bra ret_from_signal\n"
-#else
-			 "   movel %0,%/a0\n\t"
-			 "   subl %1,%/a0\n\t"     /* make room on stack */
-			 "   movel %/a0,%/sp\n\t"  /* set stack pointer */
-			 /* move switch_stack and pt_regs */
-			 "1: movel %0@+,%/a0@+\n\t"
-			 "   dbra %2,1b\n\t"
-			 "   lea %/sp@(%c3),%/a0\n\t" /* add offset of fmt */
-			 "   lsrl  #2,%1\n\t"
-			 "   subql #1,%1\n\t"
-			 /* copy to the gap we'd made */
-			 "2: movel %4@+,%/a0@+\n\t"
-			 "   dbra %1,2b\n\t"
-			 "   bral ret_from_signal\n"
-#endif
-			 : /* no outputs, it doesn't ever return */
-			 : "a" (sw), "d" (fsize), "d" (frame_offset/4-1),
-			   "n" (frame_offset), "a" (buf + fsize/4)
-			 : "a0");
-#undef frame_offset
-	}
-	return 0;
-}
-
-static inline int
-restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *usc, void __user *fp)
-{
-	int formatvec;
-	struct sigcontext context;
-	int err;
-
-	/* Always make any pending restarted system calls return -EINTR */
-	current_thread_info()->restart_block.fn = do_no_restart_syscall;
-
-	/* get previous context */
-	if (copy_from_user(&context, usc, sizeof(context)))
-		goto badframe;
-
-	/* restore passed registers */
-	regs->d0 = context.sc_d0;
-	regs->d1 = context.sc_d1;
-	regs->a0 = context.sc_a0;
-	regs->a1 = context.sc_a1;
-	regs->sr = (regs->sr & 0xff00) | (context.sc_sr & 0xff);
-	regs->pc = context.sc_pc;
-	regs->orig_d0 = -1;		/* disable syscall checks */
-	wrusp(context.sc_usp);
-	formatvec = context.sc_formatvec;
-
-	err = restore_fpu_state(&context);
-
-	if (err || mangle_kernel_stack(regs, formatvec, fp))
-		goto badframe;
-
-	return 0;
-
-badframe:
-	return 1;
-}
-
-static inline int
-rt_restore_ucontext(struct pt_regs *regs, struct switch_stack *sw,
-		    struct ucontext __user *uc)
-{
-	int temp;
-	greg_t __user *gregs = uc->uc_mcontext.gregs;
-	unsigned long usp;
-	int err;
-
-	/* Always make any pending restarted system calls return -EINTR */
-	current_thread_info()->restart_block.fn = do_no_restart_syscall;
-
-	err = __get_user(temp, &uc->uc_mcontext.version);
-	if (temp != MCONTEXT_VERSION)
-		goto badframe;
-	/* restore passed registers */
-	err |= __get_user(regs->d0, &gregs[0]);
-	err |= __get_user(regs->d1, &gregs[1]);
-	err |= __get_user(regs->d2, &gregs[2]);
-	err |= __get_user(regs->d3, &gregs[3]);
-	err |= __get_user(regs->d4, &gregs[4]);
-	err |= __get_user(regs->d5, &gregs[5]);
-	err |= __get_user(sw->d6, &gregs[6]);
-	err |= __get_user(sw->d7, &gregs[7]);
-	err |= __get_user(regs->a0, &gregs[8]);
-	err |= __get_user(regs->a1, &gregs[9]);
-	err |= __get_user(regs->a2, &gregs[10]);
-	err |= __get_user(sw->a3, &gregs[11]);
-	err |= __get_user(sw->a4, &gregs[12]);
-	err |= __get_user(sw->a5, &gregs[13]);
-	err |= __get_user(sw->a6, &gregs[14]);
-	err |= __get_user(usp, &gregs[15]);
-	wrusp(usp);
-	err |= __get_user(regs->pc, &gregs[16]);
-	err |= __get_user(temp, &gregs[17]);
-	regs->sr = (regs->sr & 0xff00) | (temp & 0xff);
-	regs->orig_d0 = -1;		/* disable syscall checks */
-	err |= __get_user(temp, &uc->uc_formatvec);
-
-	err |= rt_restore_fpu_state(uc);
-
-	if (err || do_sigaltstack(&uc->uc_stack, NULL, usp) == -EFAULT)
-		goto badframe;
-
-	if (mangle_kernel_stack(regs, temp, &uc->uc_extra))
-		goto badframe;
-
-	return 0;
-
-badframe:
-	return 1;
-}
-
-asmlinkage int do_sigreturn(unsigned long __unused)
-{
-	struct switch_stack *sw = (struct switch_stack *) &__unused;
-	struct pt_regs *regs = (struct pt_regs *) (sw + 1);
-	unsigned long usp = rdusp();
-	struct sigframe __user *frame = (struct sigframe __user *)(usp - 4);
-	sigset_t set;
-
-	if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
-		goto badframe;
-	if (__get_user(set.sig[0], &frame->sc.sc_mask) ||
-	    (_NSIG_WORDS > 1 &&
-	     __copy_from_user(&set.sig[1], &frame->extramask,
-			      sizeof(frame->extramask))))
-		goto badframe;
-
-	sigdelsetmask(&set, ~_BLOCKABLE);
-	current->blocked = set;
-	recalc_sigpending();
-
-	if (restore_sigcontext(regs, &frame->sc, frame + 1))
-		goto badframe;
-	return regs->d0;
-
-badframe:
-	force_sig(SIGSEGV, current);
-	return 0;
-}
-
-asmlinkage int do_rt_sigreturn(unsigned long __unused)
-{
-	struct switch_stack *sw = (struct switch_stack *) &__unused;
-	struct pt_regs *regs = (struct pt_regs *) (sw + 1);
-	unsigned long usp = rdusp();
-	struct rt_sigframe __user *frame = (struct rt_sigframe __user *)(usp - 4);
-	sigset_t set;
-
-	if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
-		goto badframe;
-	if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
-		goto badframe;
-
-	sigdelsetmask(&set, ~_BLOCKABLE);
-	current->blocked = set;
-	recalc_sigpending();
-
-	if (rt_restore_ucontext(regs, sw, &frame->uc))
-		goto badframe;
-	return regs->d0;
-
-badframe:
-	force_sig(SIGSEGV, current);
-	return 0;
-}
-
-/*
- * Set up a signal frame.
- */
-
-static inline void save_fpu_state(struct sigcontext *sc, struct pt_regs *regs)
-{
-	if (FPU_IS_EMU) {
-		/* save registers */
-		memcpy(sc->sc_fpcntl, current->thread.fpcntl, 12);
-		memcpy(sc->sc_fpregs, current->thread.fp, 24);
-		return;
-	}
-
-	if (CPU_IS_COLDFIRE) {
-		__asm__ volatile ("fsave %0"
-				  : : "m" (*sc->sc_fpstate) : "memory");
-	} else {
-		__asm__ volatile (".chip 68k/68881\n\t"
-				  "fsave %0\n\t"
-				  ".chip 68k"
-				  : : "m" (*sc->sc_fpstate) : "memory");
-	}
-
-	if (CPU_IS_060 ? sc->sc_fpstate[2] : sc->sc_fpstate[0]) {
-		fpu_version = sc->sc_fpstate[0];
-		if (CPU_IS_020_OR_030 &&
-		    regs->vector >= (VEC_FPBRUC * 4) &&
-		    regs->vector <= (VEC_FPNAN * 4)) {
-			/* Clear pending exception in 68882 idle frame */
-			if (*(unsigned short *) sc->sc_fpstate == 0x1f38)
-				sc->sc_fpstate[0x38] |= 1 << 3;
-		}
-
-		if (CPU_IS_COLDFIRE) {
-			__asm__ volatile ("fmovemd %%fp0-%%fp1,%0\n\t"
-					  "fmovel %%fpcr,%1\n\t"
-					  "fmovel %%fpsr,%2\n\t"
-					  "fmovel %%fpiar,%3"
-					  : "=m" (sc->sc_fpregs[0]),
-					    "=m" (sc->sc_fpcntl[0]),
-					    "=m" (sc->sc_fpcntl[1]),
-					    "=m" (sc->sc_fpcntl[2])
-					  : /* no inputs */
-					  : "memory");
-		} else {
-			__asm__ volatile (".chip 68k/68881\n\t"
-					  "fmovemx %%fp0-%%fp1,%0\n\t"
-					  "fmoveml %%fpcr/%%fpsr/%%fpiar,%1\n\t"
-					  ".chip 68k"
-					  : "=m" (*sc->sc_fpregs),
-					    "=m" (*sc->sc_fpcntl)
-					  : /* no inputs */
-					  : "memory");
-		}
-	}
-}
-
-static inline int rt_save_fpu_state(struct ucontext __user *uc, struct pt_regs *regs)
-{
-	unsigned char fpstate[FPCONTEXT_SIZE];
-	int context_size = CPU_IS_060 ? 8 : (CPU_IS_COLDFIRE ? 12 : 0);
-	int err = 0;
-
-	if (FPU_IS_EMU) {
-		/* save fpu control register */
-		err |= copy_to_user(uc->uc_mcontext.fpregs.f_fpcntl,
-				current->thread.fpcntl, 12);
-		/* save all other fpu register */
-		err |= copy_to_user(uc->uc_mcontext.fpregs.f_fpregs,
-				current->thread.fp, 96);
-		return err;
-	}
-
-	if (CPU_IS_COLDFIRE) {
-		__asm__ volatile ("fsave %0" : : "m" (*fpstate) : "memory");
-	} else {
-		__asm__ volatile (".chip 68k/68881\n\t"
-				  "fsave %0\n\t"
-				  ".chip 68k"
-				  : : "m" (*fpstate) : "memory");
-	}
-
-	err |= __put_user(*(long *)fpstate, (long __user *)&uc->uc_fpstate);
-	if (CPU_IS_060 ? fpstate[2] : fpstate[0]) {
-		fpregset_t fpregs;
-		if (!(CPU_IS_060 || CPU_IS_COLDFIRE))
-			context_size = fpstate[1];
-		fpu_version = fpstate[0];
-		if (CPU_IS_020_OR_030 &&
-		    regs->vector >= (VEC_FPBRUC * 4) &&
-		    regs->vector <= (VEC_FPNAN * 4)) {
-			/* Clear pending exception in 68882 idle frame */
-			if (*(unsigned short *) fpstate == 0x1f38)
-				fpstate[0x38] |= 1 << 3;
-		}
-		if (CPU_IS_COLDFIRE) {
-			__asm__ volatile ("fmovemd %%fp0-%%fp7,%0\n\t"
-					  "fmovel %%fpcr,%1\n\t"
-					  "fmovel %%fpsr,%2\n\t"
-					  "fmovel %%fpiar,%3"
-					  : "=m" (fpregs.f_fpregs[0]),
-					    "=m" (fpregs.f_fpcntl[0]),
-					    "=m" (fpregs.f_fpcntl[1]),
-					    "=m" (fpregs.f_fpcntl[2])
-					  : /* no inputs */
-					  : "memory");
-		} else {
-			__asm__ volatile (".chip 68k/68881\n\t"
-					  "fmovemx %%fp0-%%fp7,%0\n\t"
-					  "fmoveml %%fpcr/%%fpsr/%%fpiar,%1\n\t"
-					  ".chip 68k"
-					  : "=m" (*fpregs.f_fpregs),
-					    "=m" (*fpregs.f_fpcntl)
-					  : /* no inputs */
-					  : "memory");
-		}
-		err |= copy_to_user(&uc->uc_mcontext.fpregs, &fpregs,
-				    sizeof(fpregs));
-	}
-	if (context_size)
-		err |= copy_to_user((long __user *)&uc->uc_fpstate + 1, fpstate + 4,
-				    context_size);
-	return err;
-}
-
-static void setup_sigcontext(struct sigcontext *sc, struct pt_regs *regs,
-			     unsigned long mask)
-{
-	sc->sc_mask = mask;
-	sc->sc_usp = rdusp();
-	sc->sc_d0 = regs->d0;
-	sc->sc_d1 = regs->d1;
-	sc->sc_a0 = regs->a0;
-	sc->sc_a1 = regs->a1;
-	sc->sc_sr = regs->sr;
-	sc->sc_pc = regs->pc;
-	sc->sc_formatvec = regs->format << 12 | regs->vector;
-	save_fpu_state(sc, regs);
-}
-
-static inline int rt_setup_ucontext(struct ucontext __user *uc, struct pt_regs *regs)
-{
-	struct switch_stack *sw = (struct switch_stack *)regs - 1;
-	greg_t __user *gregs = uc->uc_mcontext.gregs;
-	int err = 0;
-
-	err |= __put_user(MCONTEXT_VERSION, &uc->uc_mcontext.version);
-	err |= __put_user(regs->d0, &gregs[0]);
-	err |= __put_user(regs->d1, &gregs[1]);
-	err |= __put_user(regs->d2, &gregs[2]);
-	err |= __put_user(regs->d3, &gregs[3]);
-	err |= __put_user(regs->d4, &gregs[4]);
-	err |= __put_user(regs->d5, &gregs[5]);
-	err |= __put_user(sw->d6, &gregs[6]);
-	err |= __put_user(sw->d7, &gregs[7]);
-	err |= __put_user(regs->a0, &gregs[8]);
-	err |= __put_user(regs->a1, &gregs[9]);
-	err |= __put_user(regs->a2, &gregs[10]);
-	err |= __put_user(sw->a3, &gregs[11]);
-	err |= __put_user(sw->a4, &gregs[12]);
-	err |= __put_user(sw->a5, &gregs[13]);
-	err |= __put_user(sw->a6, &gregs[14]);
-	err |= __put_user(rdusp(), &gregs[15]);
-	err |= __put_user(regs->pc, &gregs[16]);
-	err |= __put_user(regs->sr, &gregs[17]);
-	err |= __put_user((regs->format << 12) | regs->vector, &uc->uc_formatvec);
-	err |= rt_save_fpu_state(uc, regs);
-	return err;
-}
-
-static inline void push_cache (unsigned long vaddr)
-{
-	/*
-	 * Using the old cache_push_v() was really a big waste.
-	 *
-	 * What we are trying to do is to flush 8 bytes to ram.
-	 * Flushing 2 cache lines of 16 bytes is much cheaper than
-	 * flushing 1 or 2 pages, as previously done in
-	 * cache_push_v().
-	 *                                                     Jes
-	 */
-	if (CPU_IS_040) {
-		unsigned long temp;
-
-		__asm__ __volatile__ (".chip 68040\n\t"
-				      "nop\n\t"
-				      "ptestr (%1)\n\t"
-				      "movec %%mmusr,%0\n\t"
-				      ".chip 68k"
-				      : "=r" (temp)
-				      : "a" (vaddr));
-
-		temp &= PAGE_MASK;
-		temp |= vaddr & ~PAGE_MASK;
-
-		__asm__ __volatile__ (".chip 68040\n\t"
-				      "nop\n\t"
-				      "cpushl %%bc,(%0)\n\t"
-				      ".chip 68k"
-				      : : "a" (temp));
-	}
-	else if (CPU_IS_060) {
-		unsigned long temp;
-		__asm__ __volatile__ (".chip 68060\n\t"
-				      "plpar (%0)\n\t"
-				      ".chip 68k"
-				      : "=a" (temp)
-				      : "0" (vaddr));
-		__asm__ __volatile__ (".chip 68060\n\t"
-				      "cpushl %%bc,(%0)\n\t"
-				      ".chip 68k"
-				      : : "a" (temp));
-	} else if (!CPU_IS_COLDFIRE) {
-		/*
-		 * 68030/68020 have no writeback cache;
-		 * still need to clear icache.
-		 * Note that vaddr is guaranteed to be long word aligned.
-		 */
-		unsigned long temp;
-		asm volatile ("movec %%cacr,%0" : "=r" (temp));
-		temp += 4;
-		asm volatile ("movec %0,%%caar\n\t"
-			      "movec %1,%%cacr"
-			      : : "r" (vaddr), "r" (temp));
-		asm volatile ("movec %0,%%caar\n\t"
-			      "movec %1,%%cacr"
-			      : : "r" (vaddr + 4), "r" (temp));
-	}
-}
-
-static inline void __user *
-get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, size_t frame_size)
-{
-	unsigned long usp;
-
-	/* Default to using normal stack.  */
-	usp = rdusp();
-
-	/* This is the X/Open sanctioned signal stack switching.  */
-	if (ka->sa.sa_flags & SA_ONSTACK) {
-		if (!sas_ss_flags(usp))
-			usp = current->sas_ss_sp + current->sas_ss_size;
-	}
-	return (void __user *)((usp - frame_size) & -8UL);
-}
-
-static int setup_frame (int sig, struct k_sigaction *ka,
-			 sigset_t *set, struct pt_regs *regs)
-{
-	struct sigframe __user *frame;
-	int fsize = frame_extra_sizes[regs->format];
-	struct sigcontext context;
-	int err = 0;
-
-	if (fsize < 0) {
-#ifdef DEBUG
-		printk ("setup_frame: Unknown frame format %#x\n",
-			regs->format);
-#endif
-		goto give_sigsegv;
-	}
-
-	frame = get_sigframe(ka, regs, sizeof(*frame) + fsize);
-
-	if (fsize)
-		err |= copy_to_user (frame + 1, regs + 1, fsize);
-
-	err |= __put_user((current_thread_info()->exec_domain
-			   && current_thread_info()->exec_domain->signal_invmap
-			   && sig < 32
-			   ? current_thread_info()->exec_domain->signal_invmap[sig]
-			   : sig),
-			  &frame->sig);
-
-	err |= __put_user(regs->vector, &frame->code);
-	err |= __put_user(&frame->sc, &frame->psc);
-
-	if (_NSIG_WORDS > 1)
-		err |= copy_to_user(frame->extramask, &set->sig[1],
-				    sizeof(frame->extramask));
-
-	setup_sigcontext(&context, regs, set->sig[0]);
-	err |= copy_to_user (&frame->sc, &context, sizeof(context));
-
-	/* Set up to return from userspace.  */
-	err |= __put_user(frame->retcode, &frame->pretcode);
-	/* moveq #,d0; trap #0 */
-	err |= __put_user(0x70004e40 + (__NR_sigreturn << 16),
-			  (long __user *)(frame->retcode));
-
-	if (err)
-		goto give_sigsegv;
-
-	push_cache ((unsigned long) &frame->retcode);
-
-	/*
-	 * Set up registers for signal handler.  All the state we are about
-	 * to destroy is successfully copied to sigframe.
-	 */
-	wrusp ((unsigned long) frame);
-	regs->pc = (unsigned long) ka->sa.sa_handler;
-
-	/*
-	 * This is subtle; if we build more than one sigframe, all but the
-	 * first one will see frame format 0 and have fsize == 0, so we won't
-	 * screw stkadj.
-	 */
-	if (fsize)
-		regs->stkadj = fsize;
-
-	/* Prepare to skip over the extra stuff in the exception frame.  */
-	if (regs->stkadj) {
-		struct pt_regs *tregs =
-			(struct pt_regs *)((ulong)regs + regs->stkadj);
-#ifdef DEBUG
-		printk("Performing stackadjust=%04x\n", regs->stkadj);
-#endif
-		/* This must be copied with decreasing addresses to
-                   handle overlaps.  */
-		tregs->vector = 0;
-		tregs->format = 0;
-		tregs->pc = regs->pc;
-		tregs->sr = regs->sr;
-	}
-	return 0;
-
-give_sigsegv:
-	force_sigsegv(sig, current);
-	return err;
-}
-
-static int setup_rt_frame (int sig, struct k_sigaction *ka, siginfo_t *info,
-			    sigset_t *set, struct pt_regs *regs)
-{
-	struct rt_sigframe __user *frame;
-	int fsize = frame_extra_sizes[regs->format];
-	int err = 0;
-
-	if (fsize < 0) {
-#ifdef DEBUG
-		printk ("setup_frame: Unknown frame format %#x\n",
-			regs->format);
-#endif
-		goto give_sigsegv;
-	}
-
-	frame = get_sigframe(ka, regs, sizeof(*frame));
-
-	if (fsize)
-		err |= copy_to_user (&frame->uc.uc_extra, regs + 1, fsize);
-
-	err |= __put_user((current_thread_info()->exec_domain
-			   && current_thread_info()->exec_domain->signal_invmap
-			   && sig < 32
-			   ? current_thread_info()->exec_domain->signal_invmap[sig]
-			   : sig),
-			  &frame->sig);
-	err |= __put_user(&frame->info, &frame->pinfo);
-	err |= __put_user(&frame->uc, &frame->puc);
-	err |= copy_siginfo_to_user(&frame->info, info);
-
-	/* Create the ucontext.  */
-	err |= __put_user(0, &frame->uc.uc_flags);
-	err |= __put_user(NULL, &frame->uc.uc_link);
-	err |= __put_user((void __user *)current->sas_ss_sp,
-			  &frame->uc.uc_stack.ss_sp);
-	err |= __put_user(sas_ss_flags(rdusp()),
-			  &frame->uc.uc_stack.ss_flags);
-	err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
-	err |= rt_setup_ucontext(&frame->uc, regs);
-	err |= copy_to_user (&frame->uc.uc_sigmask, set, sizeof(*set));
-
-	/* Set up to return from userspace.  */
-	err |= __put_user(frame->retcode, &frame->pretcode);
-#ifdef __mcoldfire__
-	/* movel #__NR_rt_sigreturn,d0; trap #0 */
-	err |= __put_user(0x203c0000, (long __user *)(frame->retcode + 0));
-	err |= __put_user(0x00004e40 + (__NR_rt_sigreturn << 16),
-			  (long __user *)(frame->retcode + 4));
-#else
-	/* moveq #,d0; notb d0; trap #0 */
-	err |= __put_user(0x70004600 + ((__NR_rt_sigreturn ^ 0xff) << 16),
-			  (long __user *)(frame->retcode + 0));
-	err |= __put_user(0x4e40, (short __user *)(frame->retcode + 4));
-#endif
-
-	if (err)
-		goto give_sigsegv;
-
-	push_cache ((unsigned long) &frame->retcode);
-
-	/*
-	 * Set up registers for signal handler.  All the state we are about
-	 * to destroy is successfully copied to sigframe.
-	 */
-	wrusp ((unsigned long) frame);
-	regs->pc = (unsigned long) ka->sa.sa_handler;
-
-	/*
-	 * This is subtle; if we build more than one sigframe, all but the
-	 * first one will see frame format 0 and have fsize == 0, so we won't
-	 * screw stkadj.
-	 */
-	if (fsize)
-		regs->stkadj = fsize;
-
-	/* Prepare to skip over the extra stuff in the exception frame.  */
-	if (regs->stkadj) {
-		struct pt_regs *tregs =
-			(struct pt_regs *)((ulong)regs + regs->stkadj);
-#ifdef DEBUG
-		printk("Performing stackadjust=%04x\n", regs->stkadj);
-#endif
-		/* This must be copied with decreasing addresses to
-                   handle overlaps.  */
-		tregs->vector = 0;
-		tregs->format = 0;
-		tregs->pc = regs->pc;
-		tregs->sr = regs->sr;
-	}
-	return 0;
-
-give_sigsegv:
-	force_sigsegv(sig, current);
-	return err;
-}
-
-static inline void
-handle_restart(struct pt_regs *regs, struct k_sigaction *ka, int has_handler)
-{
-	switch (regs->d0) {
-	case -ERESTARTNOHAND:
-		if (!has_handler)
-			goto do_restart;
-		regs->d0 = -EINTR;
-		break;
-
-	case -ERESTART_RESTARTBLOCK:
-		if (!has_handler) {
-			regs->d0 = __NR_restart_syscall;
-			regs->pc -= 2;
-			break;
-		}
-		regs->d0 = -EINTR;
-		break;
-
-	case -ERESTARTSYS:
-		if (has_handler && !(ka->sa.sa_flags & SA_RESTART)) {
-			regs->d0 = -EINTR;
-			break;
-		}
-	/* fallthrough */
-	case -ERESTARTNOINTR:
-	do_restart:
-		regs->d0 = regs->orig_d0;
-		regs->pc -= 2;
-		break;
-	}
-}
-
-void ptrace_signal_deliver(struct pt_regs *regs, void *cookie)
-{
-	if (regs->orig_d0 < 0)
-		return;
-	switch (regs->d0) {
-	case -ERESTARTNOHAND:
-	case -ERESTARTSYS:
-	case -ERESTARTNOINTR:
-		regs->d0 = regs->orig_d0;
-		regs->orig_d0 = -1;
-		regs->pc -= 2;
-		break;
-	}
-}
-
-/*
- * OK, we're invoking a handler
- */
-static void
-handle_signal(int sig, struct k_sigaction *ka, siginfo_t *info,
-	      sigset_t *oldset, struct pt_regs *regs)
-{
-	int err;
-	/* are we from a system call? */
-	if (regs->orig_d0 >= 0)
-		/* If so, check system call restarting.. */
-		handle_restart(regs, ka, 1);
-
-	/* set up the stack frame */
-	if (ka->sa.sa_flags & SA_SIGINFO)
-		err = setup_rt_frame(sig, ka, info, oldset, regs);
-	else
-		err = setup_frame(sig, ka, oldset, regs);
-
-	if (err)
-		return;
-
-	sigorsets(&current->blocked,&current->blocked,&ka->sa.sa_mask);
-	if (!(ka->sa.sa_flags & SA_NODEFER))
-		sigaddset(&current->blocked,sig);
-	recalc_sigpending();
-
-	if (test_thread_flag(TIF_DELAYED_TRACE)) {
-		regs->sr &= ~0x8000;
-		send_sig(SIGTRAP, current, 1);
-	}
-
-	clear_thread_flag(TIF_RESTORE_SIGMASK);
-}
-
-/*
- * Note that 'init' is a special process: it doesn't get signals it doesn't
- * want to handle. Thus you cannot kill init even with a SIGKILL even by
- * mistake.
- */
-asmlinkage void do_signal(struct pt_regs *regs)
-{
-	siginfo_t info;
-	struct k_sigaction ka;
-	int signr;
-	sigset_t *oldset;
-
-	current->thread.esp0 = (unsigned long) regs;
-
-	if (test_thread_flag(TIF_RESTORE_SIGMASK))
-		oldset = &current->saved_sigmask;
-	else
-		oldset = &current->blocked;
-
-	signr = get_signal_to_deliver(&info, &ka, regs, NULL);
-	if (signr > 0) {
-		/* Whee!  Actually deliver the signal.  */
-		handle_signal(signr, &ka, &info, oldset, regs);
-		return;
-	}
-
-	/* Did we come from a system call? */
-	if (regs->orig_d0 >= 0)
-		/* Restart the system call - no handlers present */
-		handle_restart(regs, NULL, 0);
-
-	/* If there's no signal to deliver, we just restore the saved mask.  */
-	if (test_thread_flag(TIF_RESTORE_SIGMASK)) {
-		clear_thread_flag(TIF_RESTORE_SIGMASK);
-		sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
-	}
-}