powerpc: merge ppc signal.c and ppc64 signal32.c

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>

6 files changed, 635 insertions, 1135 deletions

diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile
index 1ca740bc5b47..043ddd09521d 100644
--- a/arch/powerpc/kernel/Makefile
+++ b/arch/powerpc/kernel/Makefile
@@ -10,7 +10,7 @@ CFLAGS_prom_init.o      += -fPIC
 CFLAGS_btext.o          += -fPIC
 endif
 
-obj-y                           := semaphore.o cputable.o ptrace.o
+obj-y                           := semaphore.o cputable.o ptrace.o signal_32.o
 obj-$(CONFIG_PPC64)             += binfmt_elf32.o sys_ppc32.o
 obj-$(CONFIG_ALTIVEC)           += vecemu.o vector.o
 obj-$(CONFIG_POWER4)            += idle_power4.o
diff --git a/arch/ppc64/kernel/signal32.c b/arch/powerpc/kernel/signal_32.c
index a8b7a5a56bb4..e53127ec373d 100644
--- a/arch/ppc64/kernel/signal32.c
+++ b/arch/powerpc/kernel/signal_32.c
@@ -1,56 +1,352 @@
 /*
- * signal32.c: Support 32bit signal syscalls.
+ * Signal handling for 32bit PPC and 32bit tasks on 64bit PPC
  *
+ *  PowerPC version
+ *    Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
  * Copyright (C) 2001 IBM
  * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
  * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
  *
- * These routines maintain argument size conversion between 32bit and 64bit
- * environment.
+ *  Derived from "arch/i386/kernel/signal.c"
+ *    Copyright (C) 1991, 1992 Linus Torvalds
+ *    1997-11-28  Modified for POSIX.1b signals by Richard Henderson
  *
- *      This program is free software; you can redistribute it and/or
- *      modify it under the terms of the GNU General Public License
- *      as published by the Free Software Foundation; either version
- *      2 of the License, or (at your option) any later version.
+ *  This program is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU General Public License
+ *  as published by the Free Software Foundation; either version
+ *  2 of the License, or (at your option) any later version.
  */
 
 #include <linux/config.h>
 #include <linux/sched.h>
-#include <linux/mm.h> 
+#include <linux/mm.h>
 #include <linux/smp.h>
 #include <linux/smp_lock.h>
 #include <linux/kernel.h>
 #include <linux/signal.h>
-#include <linux/syscalls.h>
 #include <linux/errno.h>
 #include <linux/elf.h>
+#ifdef CONFIG_PPC64
+#include <linux/syscalls.h>
 #include <linux/compat.h>
 #include <linux/ptrace.h>
-#include <asm/ppc32.h>
+#else
+#include <linux/wait.h>
+#include <linux/ptrace.h>
+#include <linux/unistd.h>
+#include <linux/stddef.h>
+#include <linux/tty.h>
+#include <linux/binfmts.h>
+#include <linux/suspend.h>
+#endif
+
 #include <asm/uaccess.h>
+#include <asm/cacheflush.h>
+#ifdef CONFIG_PPC64
+#include <asm/ppc32.h>
 #include <asm/ppcdebug.h>
 #include <asm/unistd.h>
-#include <asm/cacheflush.h>
 #include <asm/vdso.h>
+#else
+#include <asm/ucontext.h>
+#include <asm/pgtable.h>
+#endif
 
-#define DEBUG_SIG 0
+#undef DEBUG_SIG
 
 #define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
 
-#define GP_REGS_SIZE32  min(sizeof(elf_gregset_t32), sizeof(struct pt_regs32))
+#ifdef CONFIG_PPC64
+#define do_signal       do_signal32
+#define sys_sigsuspend  sys32_sigsuspend
+#define sys_rt_sigsuspend       sys32_rt_sigsuspend
+#define sys_rt_sigreturn        sys32_rt_sigreturn
+#define sys_sigaction   sys32_sigaction
+#define sys_swapcontext sys32_swapcontext
+#define sys_sigreturn   sys32_sigreturn
+
+#define old_sigaction   old_sigaction32
+#define sigcontext      sigcontext32
+#define mcontext        mcontext32
+#define ucontext        ucontext32
+
+/*
+ * Returning 0 means we return to userspace via
+ * ret_from_except and thus restore all user
+ * registers from *regs.  This is what we need
+ * to do when a signal has been delivered.
+ */
+#define sigreturn_exit(regs)    return 0
+
+#define GP_REGS_SIZE    min(sizeof(elf_gregset_t32), sizeof(struct pt_regs32))
+#undef __SIGNAL_FRAMESIZE
+#define __SIGNAL_FRAMESIZE      __SIGNAL_FRAMESIZE32
+#undef ELF_NVRREG
+#define ELF_NVRREG      ELF_NVRREG32
+
+/*
+ * Functions for flipping sigsets (thanks to brain dead generic
+ * implementation that makes things simple for little endian only)
+ */
+static inline int put_sigset_t(compat_sigset_t __user *uset, sigset_t *set)
+{
+        compat_sigset_t cset;
+
+        switch (_NSIG_WORDS) {
+        case 4: cset.sig[5] = set->sig[3] & 0xffffffffull;
+                cset.sig[7] = set->sig[3] >> 32;
+        case 3: cset.sig[4] = set->sig[2] & 0xffffffffull;
+                cset.sig[5] = set->sig[2] >> 32;
+        case 2: cset.sig[2] = set->sig[1] & 0xffffffffull;
+                cset.sig[3] = set->sig[1] >> 32;
+        case 1: cset.sig[0] = set->sig[0] & 0xffffffffull;
+                cset.sig[1] = set->sig[0] >> 32;
+        }
+        return copy_to_user(uset, &cset, sizeof(*uset));
+}
+
+static inline int get_sigset_t(sigset_t *set, compat_sigset_t __user *uset)
+{
+        compat_sigset_t s32;
+
+        if (copy_from_user(&s32, uset, sizeof(*uset)))
+                return -EFAULT;
+
+        /*
+         * Swap the 2 words of the 64-bit sigset_t (they are stored
+         * in the "wrong" endian in 32-bit user storage).
+         */
+        switch (_NSIG_WORDS) {
+        case 4: set->sig[3] = s32.sig[6] | (((long)s32.sig[7]) << 32);
+        case 3: set->sig[2] = s32.sig[4] | (((long)s32.sig[5]) << 32);
+        case 2: set->sig[1] = s32.sig[2] | (((long)s32.sig[3]) << 32);
+        case 1: set->sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32);
+        }
+        return 0;
+}
+
+static inline int get_old_sigaction(struct k_sigaction *new_ka,
+                struct old_sigaction __user *act)
+{
+        compat_old_sigset_t mask;
+        compat_uptr_t handler, restorer;
+
+        if (get_user(handler, &act->sa_handler) ||
+            __get_user(restorer, &act->sa_restorer) ||
+            __get_user(new_ka->sa.sa_flags, &act->sa_flags) ||
+            __get_user(mask, &act->sa_mask))
+                return -EFAULT;
+        new_ka->sa.sa_handler = compat_ptr(handler);
+        new_ka->sa.sa_restorer = compat_ptr(restorer);
+        siginitset(&new_ka->sa.sa_mask, mask);
+        return 0;
+}
+
+static inline compat_uptr_t to_user_ptr(void *kp)
+{
+        return (compat_uptr_t)(u64)kp;
+}
+
+#define from_user_ptr(p)        compat_ptr(p)
+
+static inline int save_general_regs(struct pt_regs *regs,
+                struct mcontext __user *frame)
+{
+        elf_greg_t64 *gregs = (elf_greg_t64 *)regs;
+        int i;
+
+        for (i = 0; i <= PT_RESULT; i ++)
+                if (__put_user((unsigned int)gregs[i], &frame->mc_gregs[i]))
+                        return -EFAULT;
+        return 0;
+}
+
+static inline int restore_general_regs(struct pt_regs *regs,
+                struct mcontext __user *sr)
+{
+        elf_greg_t64 *gregs = (elf_greg_t64 *)regs;
+        int i;
+
+        for (i = 0; i <= PT_RESULT; i++) {
+                if ((i == PT_MSR) || (i == PT_SOFTE))
+                        continue;
+                if (__get_user(gregs[i], &sr->mc_gregs[i]))
+                        return -EFAULT;
+        }
+        return 0;
+}
+
+#else /* CONFIG_PPC64 */
+
+extern void sigreturn_exit(struct pt_regs *);
+
+#define GP_REGS_SIZE    min(sizeof(elf_gregset_t), sizeof(struct pt_regs))
+
+static inline int put_sigset_t(sigset_t __user *uset, sigset_t *set)
+{
+        return copy_to_user(uset, set, sizeof(*uset));
+}
+
+static inline int get_sigset_t(sigset_t *set, sigset_t __user *uset)
+{
+        return copy_from_user(set, uset, sizeof(*uset));
+}
+
+static inline int get_old_sigaction(struct k_sigaction *new_ka,
+                struct old_sigaction __user *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);
+        return 0;
+}
+
+#define to_user_ptr(p)          (p)
+#define from_user_ptr(p)        (p)
+
+static inline int save_general_regs(struct pt_regs *regs,
+                struct mcontext __user *frame)
+{
+        return __copy_to_user(&frame->mc_gregs, regs, GP_REGS_SIZE);
+}
+
+static inline int restore_general_regs(struct pt_regs *regs,
+                struct mcontext __user *sr)
+{
+        /* copy up to but not including MSR */
+        if (__copy_from_user(regs, &sr->mc_gregs,
+                                PT_MSR * sizeof(elf_greg_t)))
+                return -EFAULT;
+        /* copy from orig_r3 (the word after the MSR) up to the end */
+        if (__copy_from_user(&regs->orig_gpr3, &sr->mc_gregs[PT_ORIG_R3],
+                                GP_REGS_SIZE - PT_ORIG_R3 * sizeof(elf_greg_t)))
+                return -EFAULT;
+        return 0;
+}
+
+#endif /* CONFIG_PPC64 */
+
+int do_signal(sigset_t *oldset, struct pt_regs *regs);
+
+/*
+ * Atomically swap in the new signal mask, and wait for a signal.
+ */
+long sys_sigsuspend(old_sigset_t mask, int p2, int p3, int p4, int p6, int p7,
+               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->result = -EINTR;
+        regs->gpr[3] = EINTR;
+        regs->ccr |= 0x10000000;
+        while (1) {
+                current->state = TASK_INTERRUPTIBLE;
+                schedule();
+                if (do_signal(&saveset, regs))
+                        sigreturn_exit(regs);
+        }
+}
+
+long sys_rt_sigsuspend(
+#ifdef CONFIG_PPC64
+                compat_sigset_t __user *unewset,
+#else
+                sigset_t __user *unewset,
+#endif
+                size_t sigsetsize, int p3, int p4,
+                int p6, int p7, 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 (get_sigset_t(&newset, unewset))
+                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->result = -EINTR;
+        regs->gpr[3] = EINTR;
+        regs->ccr |= 0x10000000;
+        while (1) {
+                current->state = TASK_INTERRUPTIBLE;
+                schedule();
+                if (do_signal(&saveset, regs))
+                        sigreturn_exit(regs);
+        }
+}
+
+#ifdef CONFIG_PPC32
+long sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss, int r5,
+                int r6, int r7, int r8, struct pt_regs *regs)
+{
+        return do_sigaltstack(uss, uoss, regs->gpr[1]);
+}
+#endif
+
+long sys_sigaction(int sig, struct old_sigaction __user *act,
+                struct old_sigaction __user *oact)
+{
+        struct k_sigaction new_ka, old_ka;
+        int ret;
+
+#ifdef CONFIG_PPC64
+        if (sig < 0)
+                sig = -sig;
+#endif
+
+        if (act) {
+                if (get_old_sigaction(&new_ka, act))
+                        return -EFAULT;
+        }
+
+        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(to_user_ptr(old_ka.sa.sa_handler),
+                            &oact->sa_handler) ||
+                    __put_user(to_user_ptr(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;
+}
 
 /*
  * When we have signals to deliver, we set up on the
  * user stack, going down from the original stack pointer:
- *      a sigregs32 struct
- *      a sigcontext32 struct
- *      a gap of __SIGNAL_FRAMESIZE32 bytes
+ *      a sigregs struct
+ *      a sigcontext struct
+ *      a gap of __SIGNAL_FRAMESIZE bytes
  *
  * Each of these things must be a multiple of 16 bytes in size.
  *
  */
-struct sigregs32 {
-        struct mcontext32       mctx;           /* all the register values */
+struct sigregs {
+        struct mcontext mctx;           /* all the register values */
         /*
          * Programs using the rs6000/xcoff abi can save up to 19 gp
          * regs and 18 fp regs below sp before decrementing it.
@@ -64,17 +360,21 @@ struct sigregs32 {
 /*
  *  When we have rt signals to deliver, we set up on the
  *  user stack, going down from the original stack pointer:
- *      one rt_sigframe32 struct (siginfo + ucontext + ABI gap)
- *      a gap of __SIGNAL_FRAMESIZE32+16 bytes
- *  (the +16 is to get the siginfo and ucontext32 in the same
+ *      one rt_sigframe struct (siginfo + ucontext + ABI gap)
+ *      a gap of __SIGNAL_FRAMESIZE+16 bytes
+ *  (the +16 is to get the siginfo and ucontext in the same
  *  positions as in older kernels).
  *
  *  Each of these things must be a multiple of 16 bytes in size.
  *
  */
-struct rt_sigframe32 {
-        compat_siginfo_t        info;
-        struct ucontext32       uc;
+struct rt_sigframe {
+#ifdef CONFIG_PPC64
+        compat_siginfo_t info;
+#else
+        struct siginfo info;
+#endif
+        struct ucontext uc;
         /*
          * Programs using the rs6000/xcoff abi can save up to 19 gp
          * regs and 18 fp regs below sp before decrementing it.
@@ -82,66 +382,24 @@ struct rt_sigframe32 {
         int                     abigap[56];
 };
 
-
-/*
- * Common utility functions used by signal and context support
- *
- */
-
-/*
- * Restore the user process's signal mask
- * (implemented in signal.c)
- */
-extern void restore_sigmask(sigset_t *set);
-
-/*
- * Functions for flipping sigsets (thanks to brain dead generic
- * implementation that makes things simple for little endian only
- */
-static inline void compat_from_sigset(compat_sigset_t *compat, sigset_t *set)
-{
-        switch (_NSIG_WORDS) {
-        case 4: compat->sig[5] = set->sig[3] & 0xffffffffull ;
-                compat->sig[7] = set->sig[3] >> 32; 
-        case 3: compat->sig[4] = set->sig[2] & 0xffffffffull ;
-                compat->sig[5] = set->sig[2] >> 32; 
-        case 2: compat->sig[2] = set->sig[1] & 0xffffffffull ;
-                compat->sig[3] = set->sig[1] >> 32; 
-        case 1: compat->sig[0] = set->sig[0] & 0xffffffffull ;
-                compat->sig[1] = set->sig[0] >> 32; 
-        }
-}
-
-static inline void sigset_from_compat(sigset_t *set, compat_sigset_t *compat)
-{
-        switch (_NSIG_WORDS) {
-        case 4: set->sig[3] = compat->sig[6] | (((long)compat->sig[7]) << 32);
-        case 3: set->sig[2] = compat->sig[4] | (((long)compat->sig[5]) << 32);
-        case 2: set->sig[1] = compat->sig[2] | (((long)compat->sig[3]) << 32);
-        case 1: set->sig[0] = compat->sig[0] | (((long)compat->sig[1]) << 32);
-        }
-}
-
-
 /*
  * Save the current user registers on the user stack.
- * We only save the altivec registers if the process has used
- * altivec instructions at some point.
+ * We only save the altivec/spe registers if the process has used
+ * altivec/spe instructions at some point.
  */
-static int save_user_regs(struct pt_regs *regs, struct mcontext32 __user *frame, int sigret)
+static int save_user_regs(struct pt_regs *regs, struct mcontext __user *frame,
+                int sigret)
 {
-        elf_greg_t64 *gregs = (elf_greg_t64 *)regs;
-        int i, err = 0;
-
+#ifdef CONFIG_PPC32
+        CHECK_FULL_REGS(regs);
+#endif
         /* Make sure floating point registers are stored in regs */
         flush_fp_to_thread(current);
 
         /* save general and floating-point registers */
-        for (i = 0; i <= PT_RESULT; i ++)
-                err |= __put_user((unsigned int)gregs[i], &frame->mc_gregs[i]);
-        err |= __copy_to_user(&frame->mc_fregs, current->thread.fpr,
-                              ELF_NFPREG * sizeof(double));
-        if (err)
+        if (save_general_regs(regs, frame) ||
+            __copy_to_user(&frame->mc_fregs, current->thread.fpr,
+                    ELF_NFPREG * sizeof(double)))
                 return 1;
 
         current->thread.fpscr = 0;      /* turn off all fp exceptions */
@@ -151,7 +409,7 @@ static int save_user_regs(struct pt_regs *regs, struct mcontext32 __user *frame,
         if (current->thread.used_vr) {
                 flush_altivec_to_thread(current);
                 if (__copy_to_user(&frame->mc_vregs, current->thread.vr,
-                                   ELF_NVRREG32 * sizeof(vector128)))
+                                   ELF_NVRREG * sizeof(vector128)))
                         return 1;
                 /* set MSR_VEC in the saved MSR value to indicate that
                    frame->mc_vregs contains valid data */
@@ -169,6 +427,25 @@ static int save_user_regs(struct pt_regs *regs, struct mcontext32 __user *frame,
                 return 1;
 #endif /* CONFIG_ALTIVEC */
 
+#ifdef CONFIG_SPE
+        /* save spe registers */
+        if (current->thread.used_spe) {
+                flush_spe_to_thread(current);
+                if (__copy_to_user(&frame->mc_vregs, current->thread.evr,
+                                   ELF_NEVRREG * sizeof(u32)))
+                        return 1;
+                /* set MSR_SPE in the saved MSR value to indicate that
+                   frame->mc_vregs contains valid data */
+                if (__put_user(regs->msr | MSR_SPE, &frame->mc_gregs[PT_MSR]))
+                        return 1;
+        }
+        /* else assert((regs->msr & MSR_SPE) == 0) */
+
+        /* We always copy to/from spefscr */
+        if (__put_user(current->thread.spefscr, (u32 __user *)&frame->mc_vregs + ELF_NEVRREG))
+                return 1;
+#endif /* CONFIG_SPE */
+
         if (sigret) {
                 /* Set up the sigreturn trampoline: li r0,sigret; sc */
                 if (__put_user(0x38000000UL + sigret, &frame->tramp[0])
@@ -186,13 +463,11 @@ static int save_user_regs(struct pt_regs *regs, struct mcontext32 __user *frame,
  * (except for MSR).
  */
 static long restore_user_regs(struct pt_regs *regs,
-                              struct mcontext32 __user *sr, int sig)
+                              struct mcontext __user *sr, int sig)
 {
-        elf_greg_t64 *gregs = (elf_greg_t64 *)regs;
-        int i;
-        long err = 0;
+        long err;
         unsigned int save_r2 = 0;
-#ifdef CONFIG_ALTIVEC
+#if defined(CONFIG_ALTIVEC) || defined(CONFIG_SPE)
         unsigned long msr;
 #endif
 
@@ -202,11 +477,7 @@ static long restore_user_regs(struct pt_regs *regs,
          */
         if (!sig)
                 save_r2 = (unsigned int)regs->gpr[2];
-        for (i = 0; i <= PT_RESULT; i++) {
-                if ((i == PT_MSR) || (i == PT_SOFTE))
-                        continue;
-                err |= __get_user(gregs[i], &sr->mc_gregs[i]);
-        }
+        err = restore_general_regs(regs, sr);
         if (!sig)
                 regs->gpr[2] = (unsigned long) save_r2;
         if (err)
@@ -229,135 +500,51 @@ static long restore_user_regs(struct pt_regs *regs,
                                      sizeof(sr->mc_vregs)))
                         return 1;
         } else if (current->thread.used_vr)
-                memset(current->thread.vr, 0, ELF_NVRREG32 * sizeof(vector128));
+                memset(current->thread.vr, 0, ELF_NVRREG * sizeof(vector128));
 
         /* Always get VRSAVE back */
         if (__get_user(current->thread.vrsave, (u32 __user *)&sr->mc_vregs[32]))
                 return 1;
 #endif /* CONFIG_ALTIVEC */
 
+#ifdef CONFIG_SPE
+        /* force the process to reload the spe registers from
+           current->thread when it next does spe instructions */
+        regs->msr &= ~MSR_SPE;
+        if (!__get_user(msr, &sr->mc_gregs[PT_MSR]) && (msr & MSR_SPE) != 0) {
+                /* restore spe registers from the stack */
+                if (__copy_from_user(current->thread.evr, &sr->mc_vregs,
+                                     ELF_NEVRREG * sizeof(u32)))
+                        return 1;
+        } else if (current->thread.used_spe)
+                memset(current->thread.evr, 0, ELF_NEVRREG * sizeof(u32));
+
+        /* Always get SPEFSCR back */
+        if (__get_user(current->thread.spefscr, (u32 __user *)&sr->mc_vregs + ELF_NEVRREG))
+                return 1;
+#endif /* CONFIG_SPE */
+
 #ifndef CONFIG_SMP
         preempt_disable();
         if (last_task_used_math == current)
                 last_task_used_math = NULL;
         if (last_task_used_altivec == current)
                 last_task_used_altivec = NULL;
+#ifdef CONFIG_SPE
+        if (last_task_used_spe == current)
+                last_task_used_spe = NULL;
+#endif
         preempt_enable();
 #endif
         return 0;
 }
 
-
-/*
- *  Start of nonRT signal support
- *
- *     sigset_t is 32 bits for non-rt signals
- *
- *  System Calls
- *       sigaction                sys32_sigaction
- *       sigreturn                sys32_sigreturn
- *
- *  Note sigsuspend has no special 32 bit routine - uses the 64 bit routine
- *
- *  Other routines
- *        setup_frame32
- */
-
-/*
- * Atomically swap in the new signal mask, and wait for a signal.
- */
-long sys32_sigsuspend(old_sigset_t mask, int p2, int p3, int p4, int p6, int p7,
-               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->result = -EINTR;
-        regs->gpr[3] = EINTR;
-        regs->ccr |= 0x10000000;
-        while (1) {
-                current->state = TASK_INTERRUPTIBLE;
-                schedule();
-                if (do_signal32(&saveset, regs))
-                        /*
-                         * Returning 0 means we return to userspace via
-                         * ret_from_except and thus restore all user
-                         * registers from *regs.  This is what we need
-                         * to do when a signal has been delivered.
-                         */
-                        return 0;
-        }
-}
-
-long sys32_sigaction(int sig, struct old_sigaction32 __user *act,
-                struct old_sigaction32 __user *oact)
-{
-        struct k_sigaction new_ka, old_ka;
-        int ret;
-        
-        if (sig < 0)
-                sig = -sig;
-
-        if (act) {
-                compat_old_sigset_t mask;
-                compat_uptr_t handler, restorer;
-
-                if (get_user(handler, &act->sa_handler) ||
-                    __get_user(restorer, &act->sa_restorer) ||
-                    __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
-                    __get_user(mask, &act->sa_mask))
-                        return -EFAULT;
-                new_ka.sa.sa_handler = compat_ptr(handler);
-                new_ka.sa.sa_restorer = compat_ptr(restorer);
-                siginitset(&new_ka.sa.sa_mask, mask);
-        }
-
-        ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
-        if (!ret && oact) {
-                if (put_user((long)old_ka.sa.sa_handler, &oact->sa_handler) ||
-                    __put_user((long)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;
-}
-
-
-
-/*
- *  Start of RT signal support
- *
- *     sigset_t is 64 bits for rt signals
- *
- *  System Calls
- *       sigaction                sys32_rt_sigaction
- *       sigpending               sys32_rt_sigpending
- *       sigprocmask              sys32_rt_sigprocmask
- *       sigreturn                sys32_rt_sigreturn
- *       sigqueueinfo             sys32_rt_sigqueueinfo
- *       sigsuspend               sys32_rt_sigsuspend
- *
- *  Other routines
- *        setup_rt_frame32
- *        copy_siginfo_to_user32
- *        siginfo32to64
- */
-
-
+#ifdef CONFIG_PPC64
 long sys32_rt_sigaction(int sig, const struct sigaction32 __user *act,
                 struct sigaction32 __user *oact, size_t sigsetsize)
 {
         struct k_sigaction new_ka, old_ka;
         int ret;
-        compat_sigset_t set32;
 
         /* XXX: Don't preclude handling different sized sigset_t's.  */
         if (sigsetsize != sizeof(compat_sigset_t))
@@ -368,9 +555,7 @@ long sys32_rt_sigaction(int sig, const struct sigaction32 __user *act,
 
                 ret = get_user(handler, &act->sa_handler);
                 new_ka.sa.sa_handler = compat_ptr(handler);
-                ret |= __copy_from_user(&set32, &act->sa_mask,
-                                        sizeof(compat_sigset_t));
-                sigset_from_compat(&new_ka.sa.sa_mask, &set32);
+                ret |= get_sigset_t(&new_ka.sa.sa_mask, &act->sa_mask);
                 ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
                 if (ret)
                         return -EFAULT;
@@ -378,10 +563,8 @@ long sys32_rt_sigaction(int sig, const struct sigaction32 __user *act,
 
         ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
         if (!ret && oact) {
-                compat_from_sigset(&set32, &old_ka.sa.sa_mask);
                 ret = put_user((long)old_ka.sa.sa_handler, &oact->sa_handler);
-                ret |= __copy_to_user(&oact->sa_mask, &set32,
-                                      sizeof(compat_sigset_t));
+                ret |= put_sigset_t(&oact->sa_mask, &old_ka.sa.sa_mask);
                 ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
         }
         return ret;
@@ -399,27 +582,24 @@ long sys32_rt_sigprocmask(u32 how, compat_sigset_t __user *set,
 {
         sigset_t s;
         sigset_t __user *up;
-        compat_sigset_t s32;
         int ret;
         mm_segment_t old_fs = get_fs();
 
         if (set) {
-                if (copy_from_user (&s32, set, sizeof(compat_sigset_t)))
-                        return -EFAULT;    
-                sigset_from_compat(&s, &s32);
+                if (get_sigset_t(&s, set))
+                        return -EFAULT;
         }
-        
+
         set_fs(KERNEL_DS);
         /* This is valid because of the set_fs() */
         up = (sigset_t __user *) &s;
         ret = sys_rt_sigprocmask((int)how, set ? up : NULL, oset ? up : NULL,
-                                 sigsetsize); 
+                                 sigsetsize);
         set_fs(old_fs);
         if (ret)
                 return ret;
         if (oset) {
-                compat_from_sigset(&s32, &s);
-                if (copy_to_user (oset, &s32, sizeof(compat_sigset_t)))
+                if (put_sigset_t(oset, &s))
                         return -EFAULT;
         }
         return 0;
@@ -428,7 +608,6 @@ long sys32_rt_sigprocmask(u32 how, compat_sigset_t __user *set,
 long sys32_rt_sigpending(compat_sigset_t __user *set, compat_size_t sigsetsize)
 {
         sigset_t s;
-        compat_sigset_t s32;
         int ret;
         mm_segment_t old_fs = get_fs();
 
@@ -437,8 +616,7 @@ long sys32_rt_sigpending(compat_sigset_t __user *set, compat_size_t sigsetsize)
         ret = sys_rt_sigpending((sigset_t __user *) &s, sigsetsize);
         set_fs(old_fs);
         if (!ret) {
-                compat_from_sigset(&s32, &s);
-                if (copy_to_user (set, &s32, sizeof(compat_sigset_t)))
+                if (put_sigset_t(set, &s))
                         return -EFAULT;
         }
         return ret;
@@ -500,6 +678,8 @@ int copy_siginfo_to_user32(struct compat_siginfo __user *d, siginfo_t *s)
         return err;
 }
 
+#define copy_siginfo_to_user    copy_siginfo_to_user32
+
 /*
  * Note: it is necessary to treat pid and sig as unsigned ints, with the
  * corresponding cast to a signed int to insure that the proper conversion
@@ -512,7 +692,7 @@ long sys32_rt_sigqueueinfo(u32 pid, u32 sig, compat_siginfo_t __user *uinfo)
         siginfo_t info;
         int ret;
         mm_segment_t old_fs = get_fs();
-        
+
         if (copy_from_user (&info, uinfo, 3*sizeof(int)) ||
             copy_from_user (info._sifields._pad, uinfo->_sifields._pad, SI_PAD_SIZE32))
                 return -EFAULT;
@@ -522,50 +702,6 @@ long sys32_rt_sigqueueinfo(u32 pid, u32 sig, compat_siginfo_t __user *uinfo)
         set_fs (old_fs);
         return ret;
 }
-
-int sys32_rt_sigsuspend(compat_sigset_t __user * unewset, size_t sigsetsize, int p3,
-                int p4, int p6, int p7, struct pt_regs *regs)
-{
-        sigset_t saveset, newset;
-        compat_sigset_t s32;
-
-        /* XXX: Don't preclude handling different sized sigset_t's.  */
-        if (sigsetsize != sizeof(sigset_t))
-                return -EINVAL;
-
-        if (copy_from_user(&s32, unewset, sizeof(s32)))
-                return -EFAULT;
-
-        /*
-         * Swap the 2 words of the 64-bit sigset_t (they are stored
-         * in the "wrong" endian in 32-bit user storage).
-         */
-        sigset_from_compat(&newset, &s32);
-
-        sigdelsetmask(&newset, ~_BLOCKABLE);
-        spin_lock_irq(&current->sighand->siglock);
-        saveset = current->blocked;
-        current->blocked = newset;
-        recalc_sigpending();
-        spin_unlock_irq(&current->sighand->siglock);
-
-        regs->result = -EINTR;
-        regs->gpr[3] = EINTR;
-        regs->ccr |= 0x10000000;
-        while (1) {
-                current->state = TASK_INTERRUPTIBLE;
-                schedule();
-                if (do_signal32(&saveset, regs))
-                        /*
-                         * Returning 0 means we return to userspace via
-                         * ret_from_except and thus restore all user
-                         * registers from *regs.  This is what we need
-                         * to do when a signal has been delivered.
-                         */
-                        return 0;
-        }
-}
-
 /*
  *  Start Alternate signal stack support
  *
@@ -615,76 +751,95 @@ int sys32_sigaltstack(u32 __new, u32 __old, int r5,
                 return -EFAULT;
         return ret;
 }
+#endif /* CONFIG_PPC64 */
 
 
 /*
+ * Restore the user process's signal mask
+ */
+#ifdef CONFIG_PPC64
+extern void restore_sigmask(sigset_t *set);
+#else /* CONFIG_PPC64 */
+static void restore_sigmask(sigset_t *set)
+{
+        sigdelsetmask(set, ~_BLOCKABLE);
+        spin_lock_irq(&current->sighand->siglock);
+        current->blocked = *set;
+        recalc_sigpending();
+        spin_unlock_irq(&current->sighand->siglock);
+}
+#endif
+
+/*
  * Set up a signal frame for a "real-time" signal handler
  * (one which gets siginfo).
  */
-static int handle_rt_signal32(unsigned long sig, struct k_sigaction *ka,
-                              siginfo_t *info, sigset_t *oldset,
-                              struct pt_regs * regs, unsigned long newsp)
+static int handle_rt_signal(unsigned long sig, struct k_sigaction *ka,
+                siginfo_t *info, sigset_t *oldset,
+                struct pt_regs *regs, unsigned long newsp)
 {
-        struct rt_sigframe32 __user *rt_sf;
-        struct mcontext32 __user *frame;
+        struct rt_sigframe __user *rt_sf;
+        struct mcontext __user *frame;
         unsigned long origsp = newsp;
-        compat_sigset_t c_oldset;
 
         /* Set up Signal Frame */
         /* Put a Real Time Context onto stack */
         newsp -= sizeof(*rt_sf);
-        rt_sf = (struct rt_sigframe32 __user *)newsp;
+        rt_sf = (struct rt_sigframe __user *)newsp;
 
         /* create a stack frame for the caller of the handler */
-        newsp -= __SIGNAL_FRAMESIZE32 + 16;
+        newsp -= __SIGNAL_FRAMESIZE + 16;
 
         if (!access_ok(VERIFY_WRITE, (void __user *)newsp, origsp - newsp))
                 goto badframe;
 
-        compat_from_sigset(&c_oldset, oldset);
-
         /* Put the siginfo & fill in most of the ucontext */
-        if (copy_siginfo_to_user32(&rt_sf->info, info)
+        if (copy_siginfo_to_user(&rt_sf->info, info)
             || __put_user(0, &rt_sf->uc.uc_flags)
             || __put_user(0, &rt_sf->uc.uc_link)
             || __put_user(current->sas_ss_sp, &rt_sf->uc.uc_stack.ss_sp)
             || __put_user(sas_ss_flags(regs->gpr[1]),
                           &rt_sf->uc.uc_stack.ss_flags)
             || __put_user(current->sas_ss_size, &rt_sf->uc.uc_stack.ss_size)
-            || __put_user((u32)(u64)&rt_sf->uc.uc_mcontext, &rt_sf->uc.uc_regs)
-            || __copy_to_user(&rt_sf->uc.uc_sigmask, &c_oldset, sizeof(c_oldset)))
+            || __put_user(to_user_ptr(&rt_sf->uc.uc_mcontext),
+                    &rt_sf->uc.uc_regs)
+            || put_sigset_t(&rt_sf->uc.uc_sigmask, oldset))
                 goto badframe;
 
         /* Save user registers on the stack */
         frame = &rt_sf->uc.uc_mcontext;
-        if (put_user(regs->gpr[1], (u32 __user *)newsp))
-                goto badframe;
-
+#ifdef CONFIG_PPC64
         if (vdso32_rt_sigtramp && current->thread.vdso_base) {
                 if (save_user_regs(regs, frame, 0))
                         goto badframe;
                 regs->link = current->thread.vdso_base + vdso32_rt_sigtramp;
-        } else {
+        } else
+#endif
+        {
                 if (save_user_regs(regs, frame, __NR_rt_sigreturn))
                         goto badframe;
                 regs->link = (unsigned long) frame->tramp;
         }
-        regs->gpr[1] = (unsigned long) newsp;
+        if (put_user(regs->gpr[1], (unsigned long __user *)newsp))
+                goto badframe;
+        regs->gpr[1] = newsp;
         regs->gpr[3] = sig;
         regs->gpr[4] = (unsigned long) &rt_sf->info;
         regs->gpr[5] = (unsigned long) &rt_sf->uc;
         regs->gpr[6] = (unsigned long) rt_sf;
         regs->nip = (unsigned long) ka->sa.sa_handler;
+        regs->link = (unsigned long) frame->tramp;
         regs->trap = 0;
+#ifdef CONFIG_PPC64
         regs->result = 0;
 
         if (test_thread_flag(TIF_SINGLESTEP))
                 ptrace_notify(SIGTRAP);
-
+#endif
         return 1;
 
 badframe:
-#if DEBUG_SIG
+#ifdef DEBUG_SIG
         printk("badframe in handle_rt_signal, regs=%p frame=%p newsp=%lx\n",
                regs, frame, newsp);
 #endif
@@ -692,46 +847,50 @@ badframe:
         return 0;
 }
 
-static long do_setcontext32(struct ucontext32 __user *ucp, struct pt_regs *regs, int sig)
+static int do_setcontext(struct ucontext __user *ucp, struct pt_regs *regs, int sig)
 {
-        compat_sigset_t c_set;
         sigset_t set;
-        u32 mcp;
+        struct mcontext __user *mcp;
+
+        if (get_sigset_t(&set, &ucp->uc_sigmask))
+                return -EFAULT;
+#ifdef CONFIG_PPC64
+        {
+                u32 cmcp;
 
-        if (__copy_from_user(&c_set, &ucp->uc_sigmask, sizeof(c_set))
-            || __get_user(mcp, &ucp->uc_regs))
+                if (__get_user(cmcp, &ucp->uc_regs))
+                        return -EFAULT;
+                mcp = (struct mcontext __user *)(u64)cmcp;
+        }
+#else
+        if (__get_user(mcp, &ucp->uc_regs))
                 return -EFAULT;
-        sigset_from_compat(&set, &c_set);
+#endif
         restore_sigmask(&set);
-        if (restore_user_regs(regs, (struct mcontext32 __user *)(u64)mcp, sig))
+        if (restore_user_regs(regs, mcp, sig))
                 return -EFAULT;
 
         return 0;
 }
 
-/*
- * Handle {get,set,swap}_context operations for 32 bits processes
- */
-
-long sys32_swapcontext(struct ucontext32 __user *old_ctx,
-                       struct ucontext32 __user *new_ctx,
+long sys_swapcontext(struct ucontext __user *old_ctx,
+                       struct ucontext __user *new_ctx,
                        int ctx_size, int r6, int r7, int r8, struct pt_regs *regs)
 {
         unsigned char tmp;
-        compat_sigset_t c_set;
 
         /* Context size is for future use. Right now, we only make sure
          * we are passed something we understand
          */
-        if (ctx_size < sizeof(struct ucontext32))
+        if (ctx_size < sizeof(struct ucontext))
                 return -EINVAL;
 
         if (old_ctx != NULL) {
-                compat_from_sigset(&c_set, &current->blocked);
                 if (!access_ok(VERIFY_WRITE, old_ctx, sizeof(*old_ctx))
                     || save_user_regs(regs, &old_ctx->uc_mcontext, 0)
-                    || __copy_to_user(&old_ctx->uc_sigmask, &c_set, sizeof(c_set))
-                    || __put_user((u32)(u64)&old_ctx->uc_mcontext, &old_ctx->uc_regs))
+                    || put_sigset_t(&old_ctx->uc_sigmask, &current->blocked)
+                    || __put_user(to_user_ptr(&old_ctx->uc_mcontext),
+                            &old_ctx->uc_regs))
                         return -EFAULT;
         }
         if (new_ctx == NULL)
@@ -752,27 +911,26 @@ long sys32_swapcontext(struct ucontext32 __user *old_ctx,
          * or if another thread unmaps the region containing the context.
          * We kill the task with a SIGSEGV in this situation.
          */
-        if (do_setcontext32(new_ctx, regs, 0))
+        if (do_setcontext(new_ctx, regs, 0))
                 do_exit(SIGSEGV);
-
+        sigreturn_exit(regs);
+        /* doesn't actually return back to here */
         return 0;
 }
 
-long sys32_rt_sigreturn(int r3, int r4, int r5, int r6, int r7, int r8,
+long sys_rt_sigreturn(int r3, int r4, int r5, int r6, int r7, int r8,
                      struct pt_regs *regs)
 {
-        struct rt_sigframe32 __user *rt_sf;
-        int ret;
-
+        struct rt_sigframe __user *rt_sf;
 
         /* Always make any pending restarted system calls return -EINTR */
         current_thread_info()->restart_block.fn = do_no_restart_syscall;
 
-        rt_sf = (struct rt_sigframe32 __user *)
-                (regs->gpr[1] + __SIGNAL_FRAMESIZE32 + 16);
+        rt_sf = (struct rt_sigframe __user *)
+                (regs->gpr[1] + __SIGNAL_FRAMESIZE + 16);
         if (!access_ok(VERIFY_READ, rt_sf, sizeof(*rt_sf)))
                 goto bad;
-        if (do_setcontext32(&rt_sf->uc, regs, 1))
+        if (do_setcontext(&rt_sf->uc, regs, 1))
                 goto bad;
 
         /*
@@ -781,62 +939,165 @@ long sys32_rt_sigreturn(int r3, int r4, int r5, int r6, int r7, int r8,
          * signal return.  But other architectures do this and we have
          * always done it up until now so it is probably better not to
          * change it.  -- paulus
+         */
+#ifdef CONFIG_PPC64
+        /*
          * We use the sys32_ version that does the 32/64 bits conversion
          * and takes userland pointer directly. What about error checking ?
          * nobody does any...
          */
-        sys32_sigaltstack((u32)(u64)&rt_sf->uc.uc_stack, 0, 0, 0, 0, 0, regs);
-
-        ret = regs->result;
-
-        return ret;
+        sys32_sigaltstack((u32)(u64)&rt_sf->uc.uc_stack, 0, 0, 0, 0, 0, regs);
+        return (int)regs->result;
+#else
+        do_sigaltstack(&rt_sf->uc.uc_stack, NULL, regs->gpr[1]);
+        sigreturn_exit(regs);           /* doesn't return here */
+        return 0;
+#endif
 
  bad:
         force_sig(SIGSEGV, current);
         return 0;
 }
 
+#ifdef CONFIG_PPC32
+int sys_debug_setcontext(struct ucontext __user *ctx,
+                         int ndbg, struct sig_dbg_op __user *dbg,
+                         int r6, int r7, int r8,
+                         struct pt_regs *regs)
+{
+        struct sig_dbg_op op;
+        int i;
+        unsigned long new_msr = regs->msr;
+#if defined(CONFIG_4xx) || defined(CONFIG_BOOKE)
+        unsigned long new_dbcr0 = current->thread.dbcr0;
+#endif
+
+        for (i=0; i<ndbg; i++) {
+                if (__copy_from_user(&op, dbg, sizeof(op)))
+                        return -EFAULT;
+                switch (op.dbg_type) {
+                case SIG_DBG_SINGLE_STEPPING:
+#if defined(CONFIG_4xx) || defined(CONFIG_BOOKE)
+                        if (op.dbg_value) {
+                                new_msr |= MSR_DE;
+                                new_dbcr0 |= (DBCR0_IDM | DBCR0_IC);
+                        } else {
+                                new_msr &= ~MSR_DE;
+                                new_dbcr0 &= ~(DBCR0_IDM | DBCR0_IC);
+                        }
+#else
+                        if (op.dbg_value)
+                                new_msr |= MSR_SE;
+                        else
+                                new_msr &= ~MSR_SE;
+#endif
+                        break;
+                case SIG_DBG_BRANCH_TRACING:
+#if defined(CONFIG_4xx) || defined(CONFIG_BOOKE)
+                        return -EINVAL;
+#else
+                        if (op.dbg_value)
+                                new_msr |= MSR_BE;
+                        else
+                                new_msr &= ~MSR_BE;
+#endif
+                        break;
+
+                default:
+                        return -EINVAL;
+                }
+        }
+
+        /* We wait until here to actually install the values in the
+           registers so if we fail in the above loop, it will not
+           affect the contents of these registers.  After this point,
+           failure is a problem, anyway, and it's very unlikely unless
+           the user is really doing something wrong. */
+        regs->msr = new_msr;
+#if defined(CONFIG_4xx) || defined(CONFIG_BOOKE)
+        current->thread.dbcr0 = new_dbcr0;
+#endif
+
+        /*
+         * If we get a fault copying the context into the kernel's
+         * image of the user's registers, we can't just return -EFAULT
+         * because the user's registers will be corrupted.  For instance
+         * the NIP value may have been updated but not some of the
+         * other registers.  Given that we have done the access_ok
+         * and successfully read the first and last bytes of the region
+         * above, this should only happen in an out-of-memory situation
+         * or if another thread unmaps the region containing the context.
+         * We kill the task with a SIGSEGV in this situation.
+         */
+        if (do_setcontext(ctx, regs, 1)) {
+                force_sig(SIGSEGV, current);
+                goto out;
+        }
+
+        /*
+         * It's not clear whether or why it is desirable to save the
+         * sigaltstack setting on signal delivery and restore it on
+         * signal return.  But other architectures do this and we have
+         * always done it up until now so it is probably better not to
+         * change it.  -- paulus
+         */
+        do_sigaltstack(&ctx->uc_stack, NULL, regs->gpr[1]);
+
+        sigreturn_exit(regs);
+        /* doesn't actually return back to here */
+
+ out:
+        return 0;
+}
+#endif
 
 /*
  * OK, we're invoking a handler
  */
-static int handle_signal32(unsigned long sig, struct k_sigaction *ka,
-                            siginfo_t *info, sigset_t *oldset,
-                            struct pt_regs * regs, unsigned long newsp)
+static int handle_signal(unsigned long sig, struct k_sigaction *ka,
+                siginfo_t *info, sigset_t *oldset, struct pt_regs *regs,
+                unsigned long newsp)
 {
-        struct sigcontext32 __user *sc;
-        struct sigregs32 __user *frame;
+        struct sigcontext __user *sc;
+        struct sigregs __user *frame;
         unsigned long origsp = newsp;
 
         /* Set up Signal Frame */
-        newsp -= sizeof(struct sigregs32);
-        frame = (struct sigregs32 __user *) newsp;
+        newsp -= sizeof(struct sigregs);
+        frame = (struct sigregs __user *) newsp;
 
         /* Put a sigcontext on the stack */
         newsp -= sizeof(*sc);
-        sc = (struct sigcontext32 __user *) newsp;
+        sc = (struct sigcontext __user *) newsp;
 
         /* create a stack frame for the caller of the handler */
-        newsp -= __SIGNAL_FRAMESIZE32;
+        newsp -= __SIGNAL_FRAMESIZE;
 
         if (!access_ok(VERIFY_WRITE, (void __user *) newsp, origsp - newsp))
                 goto badframe;
 
 #if _NSIG != 64
-#error "Please adjust handle_signal32()"
+#error "Please adjust handle_signal()"
 #endif
-        if (__put_user((u32)(u64)ka->sa.sa_handler, &sc->handler)
+        if (__put_user(to_user_ptr(ka->sa.sa_handler), &sc->handler)
             || __put_user(oldset->sig[0], &sc->oldmask)
+#ifdef CONFIG_PPC64
             || __put_user((oldset->sig[0] >> 32), &sc->_unused[3])
-            || __put_user((u32)(u64)frame, &sc->regs)
+#else
+            || __put_user(oldset->sig[1], &sc->_unused[3])
+#endif
+            || __put_user(to_user_ptr(frame), &sc->regs)
             || __put_user(sig, &sc->signal))
                 goto badframe;
 
+#ifdef CONFIG_PPC64
         if (vdso32_sigtramp && current->thread.vdso_base) {
                 if (save_user_regs(regs, &frame->mctx, 0))
                         goto badframe;
                 regs->link = current->thread.vdso_base + vdso32_sigtramp;
-        } else {
+        } else
+#endif
+        {
                 if (save_user_regs(regs, &frame->mctx, __NR_sigreturn))
                         goto badframe;
                 regs->link = (unsigned long) frame->mctx.tramp;
@@ -844,22 +1105,24 @@ static int handle_signal32(unsigned long sig, struct k_sigaction *ka,
 
         if (put_user(regs->gpr[1], (u32 __user *)newsp))
                 goto badframe;
-        regs->gpr[1] = (unsigned long) newsp;
+        regs->gpr[1] = newsp;
         regs->gpr[3] = sig;
         regs->gpr[4] = (unsigned long) sc;
         regs->nip = (unsigned long) ka->sa.sa_handler;
         regs->trap = 0;
+#ifdef CONFIG_PPC64
         regs->result = 0;
 
         if (test_thread_flag(TIF_SINGLESTEP))
                 ptrace_notify(SIGTRAP);
+#endif
 
         return 1;
 
 badframe:
-#if DEBUG_SIG
-        printk("badframe in handle_signal, regs=%p frame=%x newsp=%x\n",
-               regs, frame, *newspp);
+#ifdef DEBUG_SIG
+        printk("badframe in handle_signal, regs=%p frame=%p newsp=%lx\n",
+               regs, frame, newsp);
 #endif
         force_sigsegv(sig, current);
         return 0;
@@ -868,65 +1131,69 @@ badframe:
 /*
  * Do a signal return; undo the signal stack.
  */
-long sys32_sigreturn(int r3, int r4, int r5, int r6, int r7, int r8,
+long sys_sigreturn(int r3, int r4, int r5, int r6, int r7, int r8,
                        struct pt_regs *regs)
 {
-        struct sigcontext32 __user *sc;
-        struct sigcontext32 sigctx;
-        struct mcontext32 __user *sr;
+        struct sigcontext __user *sc;
+        struct sigcontext sigctx;
+        struct mcontext __user *sr;
         sigset_t set;
-        int ret;
 
         /* Always make any pending restarted system calls return -EINTR */
         current_thread_info()->restart_block.fn = do_no_restart_syscall;
 
-        sc = (struct sigcontext32 __user *)(regs->gpr[1] + __SIGNAL_FRAMESIZE32);
+        sc = (struct sigcontext __user *)(regs->gpr[1] + __SIGNAL_FRAMESIZE);
         if (copy_from_user(&sigctx, sc, sizeof(sigctx)))
                 goto badframe;
 
+#ifdef CONFIG_PPC64
         /*
          * Note that PPC32 puts the upper 32 bits of the sigmask in the
          * unused part of the signal stackframe
          */
         set.sig[0] = sigctx.oldmask + ((long)(sigctx._unused[3]) << 32);
+#else
+        set.sig[0] = sigctx.oldmask;
+        set.sig[1] = sigctx._unused[3];
+#endif
         restore_sigmask(&set);
 
-        sr = (struct mcontext32 __user *)(u64)sigctx.regs;
+        sr = (struct mcontext __user *)from_user_ptr(sigctx.regs);
         if (!access_ok(VERIFY_READ, sr, sizeof(*sr))
             || restore_user_regs(regs, sr, 1))
                 goto badframe;
 
-        ret = regs->result;
-        return ret;
+#ifdef CONFIG_PPC64
+        return (int)regs->result;
+#else
+        sigreturn_exit(regs);           /* doesn't return */
+        return 0;
+#endif
 
 badframe:
         force_sig(SIGSEGV, current);
         return 0;
 }
 
-
-
-/*
- *  Start of do_signal32 routine
- *
- *   This routine gets control when a pending signal needs to be processed
- *     in the 32 bit target thread -
- *
- *   It handles both rt and non-rt signals
- */
-
 /*
  * 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.
  */
-
-int do_signal32(sigset_t *oldset, struct pt_regs *regs)
+int do_signal(sigset_t *oldset, struct pt_regs *regs)
 {
         siginfo_t info;
+        struct k_sigaction ka;
         unsigned int frame, newsp;
         int signr, ret;
-        struct k_sigaction ka;
+
+#ifdef CONFIG_PPC32
+        if (try_to_freeze()) {
+                signr = 0;
+                if (!signal_pending(current))
+                        goto no_signal;
+        }
+#endif
 
         if (!oldset)
                 oldset = &current->blocked;
@@ -934,7 +1201,9 @@ int do_signal32(sigset_t *oldset, struct pt_regs *regs)
         newsp = frame = 0;
 
         signr = get_signal_to_deliver(&info, &ka, regs, NULL);
-
+#ifdef CONFIG_PPC32
+no_signal:
+#endif
         if (TRAP(regs) == 0x0C00                /* System Call! */
             && regs->ccr & 0x10000000           /* error signalled */
             && ((ret = regs->gpr[3]) == ERESTARTSYS
@@ -964,12 +1233,13 @@ int do_signal32(sigset_t *oldset, struct pt_regs *regs)
                 return 0;               /* no signals delivered */
 
         if ((ka.sa.sa_flags & SA_ONSTACK) && current->sas_ss_size
-            && (!on_sig_stack(regs->gpr[1])))
-                newsp = (current->sas_ss_sp + current->sas_ss_size);
+            && !on_sig_stack(regs->gpr[1]))
+                newsp = current->sas_ss_sp + current->sas_ss_size;
         else
                 newsp = regs->gpr[1];
         newsp &= ~0xfUL;
 
+#ifdef CONFIG_PPC64
         /*
          * Reenable the DABR before delivering the signal to
          * user space. The DABR will have been cleared if it
@@ -977,12 +1247,13 @@ int do_signal32(sigset_t *oldset, struct pt_regs *regs)
          */
         if (current->thread.dabr)
                 set_dabr(current->thread.dabr);
+#endif
 
         /* Whee!  Actually deliver the signal.  */
         if (ka.sa.sa_flags & SA_SIGINFO)
-                ret = handle_rt_signal32(signr, &ka, &info, oldset, regs, newsp);
+                ret = handle_rt_signal(signr, &ka, &info, oldset, regs, newsp);
         else
-                ret = handle_signal32(signr, &ka, &info, oldset, regs, newsp);
+                ret = handle_signal(signr, &ka, &info, oldset, regs, newsp);
 
         if (ret) {
                 spin_lock_irq(&current->sighand->siglock);
diff --git a/arch/ppc/kernel/Makefile b/arch/ppc/kernel/Makefile
index 87d3be4af820..c178397c50af 100644
--- a/arch/ppc/kernel/Makefile
+++ b/arch/ppc/kernel/Makefile
@@ -13,7 +13,7 @@ extra-$(CONFIG_POWER4)		+= idle_power4.o
 extra-y                         += vmlinux.lds
 
 obj-y                           := entry.o traps.o irq.o idle.o time.o misc.o \
-                                        process.o signal.o align.o \
+                                        process.o align.o \
                                         syscalls.o setup.o \
                                         ppc_htab.o perfmon.o
 obj-$(CONFIG_6xx)               += l2cr.o cpu_setup_6xx.o
@@ -38,7 +38,7 @@ endif
 
 else
 obj-y                           := irq.o idle.o time.o \
-                                        signal.o align.o perfmon.o
+                                        align.o perfmon.o
 obj-$(CONFIG_6xx)               += l2cr.o cpu_setup_6xx.o
 obj-$(CONFIG_SOFTWARE_SUSPEND)  += swsusp.o
 obj-$(CONFIG_MODULES)           += module.o
diff --git a/arch/ppc/kernel/signal.c b/arch/ppc/kernel/signal.c
deleted file mode 100644
index 2244bf91e593..000000000000
--- a/arch/ppc/kernel/signal.c
+++ /dev/null
@@ -1,771 +0,0 @@
-/*
- *  arch/ppc/kernel/signal.c
- *
- *  PowerPC version
- *    Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
- *
- *  Derived from "arch/i386/kernel/signal.c"
- *    Copyright (C) 1991, 1992 Linus Torvalds
- *    1997-11-28  Modified for POSIX.1b signals by Richard Henderson
- *
- *  This program is free software; you can redistribute it and/or
- *  modify it under the terms of the GNU General Public License
- *  as published by the Free Software Foundation; either version
- *  2 of the License, or (at your option) any later version.
- */
-
-#include <linux/sched.h>
-#include <linux/mm.h>
-#include <linux/smp.h>
-#include <linux/smp_lock.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/elf.h>
-#include <linux/tty.h>
-#include <linux/binfmts.h>
-#include <linux/suspend.h>
-#include <asm/ucontext.h>
-#include <asm/uaccess.h>
-#include <asm/pgtable.h>
-#include <asm/cacheflush.h>
-
-#undef DEBUG_SIG
-
-#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
-
-extern void sigreturn_exit(struct pt_regs *);
-
-#define GP_REGS_SIZE    min(sizeof(elf_gregset_t), sizeof(struct pt_regs))
-
-int do_signal(sigset_t *oldset, struct pt_regs *regs);
-
-/*
- * Atomically swap in the new signal mask, and wait for a signal.
- */
-int
-sys_sigsuspend(old_sigset_t mask, int p2, int p3, int p4, int p6, int p7,
-               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->result = -EINTR;
-        regs->gpr[3] = EINTR;
-        regs->ccr |= 0x10000000;
-        while (1) {
-                current->state = TASK_INTERRUPTIBLE;
-                schedule();
-                if (do_signal(&saveset, regs))
-                        sigreturn_exit(regs);
-        }
-}
-
-int
-sys_rt_sigsuspend(sigset_t __user *unewset, size_t sigsetsize, int p3, int p4,
-                  int p6, int p7, 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->result = -EINTR;
-        regs->gpr[3] = EINTR;
-        regs->ccr |= 0x10000000;
-        while (1) {
-                current->state = TASK_INTERRUPTIBLE;
-                schedule();
-                if (do_signal(&saveset, regs))
-                        sigreturn_exit(regs);
-        }
-}
-
-
-int
-sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss, int r5,
-                int r6, int r7, int r8, struct pt_regs *regs)
-{
-        return do_sigaltstack(uss, uoss, regs->gpr[1]);
-}
-
-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))
-                        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;
-}
-
-/*
- * When we have signals to deliver, we set up on the
- * user stack, going down from the original stack pointer:
- *      a sigregs struct
- *      a sigcontext struct
- *      a gap of __SIGNAL_FRAMESIZE bytes
- *
- * Each of these things must be a multiple of 16 bytes in size.
- *
- */
-struct sigregs {
-        struct mcontext mctx;           /* all the register values */
-        /* Programs using the rs6000/xcoff abi can save up to 19 gp regs
-           and 18 fp regs below sp before decrementing it. */
-        int             abigap[56];
-};
-
-/* We use the mc_pad field for the signal return trampoline. */
-#define tramp   mc_pad
-
-/*
- *  When we have rt signals to deliver, we set up on the
- *  user stack, going down from the original stack pointer:
- *      one rt_sigframe struct (siginfo + ucontext + ABI gap)
- *      a gap of __SIGNAL_FRAMESIZE+16 bytes
- *  (the +16 is to get the siginfo and ucontext in the same
- *  positions as in older kernels).
- *
- *  Each of these things must be a multiple of 16 bytes in size.
- *
- */
-struct rt_sigframe
-{
-        struct siginfo info;
-        struct ucontext uc;
-        /* Programs using the rs6000/xcoff abi can save up to 19 gp regs
-           and 18 fp regs below sp before decrementing it. */
-        int             abigap[56];
-};
-
-/*
- * Save the current user registers on the user stack.
- * We only save the altivec/spe registers if the process has used
- * altivec/spe instructions at some point.
- */
-static int
-save_user_regs(struct pt_regs *regs, struct mcontext __user *frame, int sigret)
-{
-        /* save general and floating-point registers */
-        CHECK_FULL_REGS(regs);
-        preempt_disable();
-        if (regs->msr & MSR_FP)
-                giveup_fpu(current);
-#ifdef CONFIG_ALTIVEC
-        if (current->thread.used_vr && (regs->msr & MSR_VEC))
-                giveup_altivec(current);
-#endif /* CONFIG_ALTIVEC */
-#ifdef CONFIG_SPE
-        if (current->thread.used_spe && (regs->msr & MSR_SPE))
-                giveup_spe(current);
-#endif /* CONFIG_ALTIVEC */
-        preempt_enable();
-
-        if (__copy_to_user(&frame->mc_gregs, regs, GP_REGS_SIZE)
-            || __copy_to_user(&frame->mc_fregs, current->thread.fpr,
-                              ELF_NFPREG * sizeof(double)))
-                return 1;
-
-        current->thread.fpscr = 0;      /* turn off all fp exceptions */
-
-#ifdef CONFIG_ALTIVEC
-        /* save altivec registers */
-        if (current->thread.used_vr) {
-                if (__copy_to_user(&frame->mc_vregs, current->thread.vr,
-                                   ELF_NVRREG * sizeof(vector128)))
-                        return 1;
-                /* set MSR_VEC in the saved MSR value to indicate that
-                   frame->mc_vregs contains valid data */
-                if (__put_user(regs->msr | MSR_VEC, &frame->mc_gregs[PT_MSR]))
-                        return 1;
-        }
-        /* else assert((regs->msr & MSR_VEC) == 0) */
-
-        /* We always copy to/from vrsave, it's 0 if we don't have or don't
-         * use altivec. Since VSCR only contains 32 bits saved in the least
-         * significant bits of a vector, we "cheat" and stuff VRSAVE in the
-         * most significant bits of that same vector. --BenH
-         */
-        if (__put_user(current->thread.vrsave, (u32 __user *)&frame->mc_vregs[32]))
-                return 1;
-#endif /* CONFIG_ALTIVEC */
-
-#ifdef CONFIG_SPE
-        /* save spe registers */
-        if (current->thread.used_spe) {
-                if (__copy_to_user(&frame->mc_vregs, current->thread.evr,
-                                   ELF_NEVRREG * sizeof(u32)))
-                        return 1;
-                /* set MSR_SPE in the saved MSR value to indicate that
-                   frame->mc_vregs contains valid data */
-                if (__put_user(regs->msr | MSR_SPE, &frame->mc_gregs[PT_MSR]))
-                        return 1;
-        }
-        /* else assert((regs->msr & MSR_SPE) == 0) */
-
-        /* We always copy to/from spefscr */
-        if (__put_user(current->thread.spefscr, (u32 *)&frame->mc_vregs + ELF_NEVRREG))
-                return 1;
-#endif /* CONFIG_SPE */
-
-        if (sigret) {
-                /* Set up the sigreturn trampoline: li r0,sigret; sc */
-                if (__put_user(0x38000000UL + sigret, &frame->tramp[0])
-                    || __put_user(0x44000002UL, &frame->tramp[1]))
-                        return 1;
-                flush_icache_range((unsigned long) &frame->tramp[0],
-                                   (unsigned long) &frame->tramp[2]);
-        }
-
-        return 0;
-}
-
-/*
- * Restore the current user register values from the user stack,
- * (except for MSR).
- */
-static int
-restore_user_regs(struct pt_regs *regs, struct mcontext __user *sr, int sig)
-{
-        unsigned long save_r2 = 0;
-#if defined(CONFIG_ALTIVEC) || defined(CONFIG_SPE)
-        unsigned long msr;
-#endif
-
-        /* backup/restore the TLS as we don't want it to be modified */
-        if (!sig)
-                save_r2 = regs->gpr[2];
-        /* copy up to but not including MSR */
-        if (__copy_from_user(regs, &sr->mc_gregs, PT_MSR * sizeof(elf_greg_t)))
-                return 1;
-        /* copy from orig_r3 (the word after the MSR) up to the end */
-        if (__copy_from_user(&regs->orig_gpr3, &sr->mc_gregs[PT_ORIG_R3],
-                             GP_REGS_SIZE - PT_ORIG_R3 * sizeof(elf_greg_t)))
-                return 1;
-        if (!sig)
-                regs->gpr[2] = save_r2;
-
-        /* force the process to reload the FP registers from
-           current->thread when it next does FP instructions */
-        regs->msr &= ~(MSR_FP | MSR_FE0 | MSR_FE1);
-        if (__copy_from_user(current->thread.fpr, &sr->mc_fregs,
-                             sizeof(sr->mc_fregs)))
-                return 1;
-
-#ifdef CONFIG_ALTIVEC
-        /* force the process to reload the altivec registers from
-           current->thread when it next does altivec instructions */
-        regs->msr &= ~MSR_VEC;
-        if (!__get_user(msr, &sr->mc_gregs[PT_MSR]) && (msr & MSR_VEC) != 0) {
-                /* restore altivec registers from the stack */
-                if (__copy_from_user(current->thread.vr, &sr->mc_vregs,
-                                     sizeof(sr->mc_vregs)))
-                        return 1;
-        } else if (current->thread.used_vr)
-                memset(&current->thread.vr, 0, ELF_NVRREG * sizeof(vector128));
-
-        /* Always get VRSAVE back */
-        if (__get_user(current->thread.vrsave, (u32 __user *)&sr->mc_vregs[32]))
-                return 1;
-#endif /* CONFIG_ALTIVEC */
-
-#ifdef CONFIG_SPE
-        /* force the process to reload the spe registers from
-           current->thread when it next does spe instructions */
-        regs->msr &= ~MSR_SPE;
-        if (!__get_user(msr, &sr->mc_gregs[PT_MSR]) && (msr & MSR_SPE) != 0) {
-                /* restore spe registers from the stack */
-                if (__copy_from_user(current->thread.evr, &sr->mc_vregs,
-                                     ELF_NEVRREG * sizeof(u32)))
-                        return 1;
-        } else if (current->thread.used_spe)
-                memset(&current->thread.evr, 0, ELF_NEVRREG * sizeof(u32));
-
-        /* Always get SPEFSCR back */
-        if (__get_user(current->thread.spefscr, (u32 *)&sr->mc_vregs + ELF_NEVRREG))
-                return 1;
-#endif /* CONFIG_SPE */
-
-#ifndef CONFIG_SMP
-        preempt_disable();
-        if (last_task_used_math == current)
-                last_task_used_math = NULL;
-        if (last_task_used_altivec == current)
-                last_task_used_altivec = NULL;
-        if (last_task_used_spe == current)
-                last_task_used_spe = NULL;
-        preempt_enable();
-#endif
-        return 0;
-}
-
-/*
- * Restore the user process's signal mask
- */
-static void
-restore_sigmask(sigset_t *set)
-{
-        sigdelsetmask(set, ~_BLOCKABLE);
-        spin_lock_irq(&current->sighand->siglock);
-        current->blocked = *set;
-        recalc_sigpending();
-        spin_unlock_irq(&current->sighand->siglock);
-}
-
-/*
- * Set up a signal frame for a "real-time" signal handler
- * (one which gets siginfo).
- */
-static void
-handle_rt_signal(unsigned long sig, struct k_sigaction *ka,
-                 siginfo_t *info, sigset_t *oldset, struct pt_regs * regs,
-                 unsigned long newsp)
-{
-        struct rt_sigframe __user *rt_sf;
-        struct mcontext __user *frame;
-        unsigned long origsp = newsp;
-
-        /* Set up Signal Frame */
-        /* Put a Real Time Context onto stack */
-        newsp -= sizeof(*rt_sf);
-        rt_sf = (struct rt_sigframe __user *) newsp;
-
-        /* create a stack frame for the caller of the handler */
-        newsp -= __SIGNAL_FRAMESIZE + 16;
-
-        if (!access_ok(VERIFY_WRITE, (void __user *) newsp, origsp - newsp))
-                goto badframe;
-
-        /* Put the siginfo & fill in most of the ucontext */
-        if (copy_siginfo_to_user(&rt_sf->info, info)
-            || __put_user(0, &rt_sf->uc.uc_flags)
-            || __put_user(0, &rt_sf->uc.uc_link)
-            || __put_user(current->sas_ss_sp, &rt_sf->uc.uc_stack.ss_sp)
-            || __put_user(sas_ss_flags(regs->gpr[1]),
-                          &rt_sf->uc.uc_stack.ss_flags)
-            || __put_user(current->sas_ss_size, &rt_sf->uc.uc_stack.ss_size)
-            || __put_user(&rt_sf->uc.uc_mcontext, &rt_sf->uc.uc_regs)
-            || __copy_to_user(&rt_sf->uc.uc_sigmask, oldset, sizeof(*oldset)))
-                goto badframe;
-
-        /* Save user registers on the stack */
-        frame = &rt_sf->uc.uc_mcontext;
-        if (save_user_regs(regs, frame, __NR_rt_sigreturn))
-                goto badframe;
-
-        if (put_user(regs->gpr[1], (unsigned long __user *)newsp))
-                goto badframe;
-        regs->gpr[1] = newsp;
-        regs->gpr[3] = sig;
-        regs->gpr[4] = (unsigned long) &rt_sf->info;
-        regs->gpr[5] = (unsigned long) &rt_sf->uc;
-        regs->gpr[6] = (unsigned long) rt_sf;
-        regs->nip = (unsigned long) ka->sa.sa_handler;
-        regs->link = (unsigned long) frame->tramp;
-        regs->trap = 0;
-
-        return;
-
-badframe:
-#ifdef DEBUG_SIG
-        printk("badframe in handle_rt_signal, regs=%p frame=%p newsp=%lx\n",
-               regs, frame, newsp);
-#endif
-        force_sigsegv(sig, current);
-}
-
-static int do_setcontext(struct ucontext __user *ucp, struct pt_regs *regs, int sig)
-{
-        sigset_t set;
-        struct mcontext __user *mcp;
-
-        if (__copy_from_user(&set, &ucp->uc_sigmask, sizeof(set))
-            || __get_user(mcp, &ucp->uc_regs))
-                return -EFAULT;
-        restore_sigmask(&set);
-        if (restore_user_regs(regs, mcp, sig))
-                return -EFAULT;
-
-        return 0;
-}
-
-int sys_swapcontext(struct ucontext __user *old_ctx,
-                    struct ucontext __user *new_ctx,
-                    int ctx_size, int r6, int r7, int r8, struct pt_regs *regs)
-{
-        unsigned char tmp;
-
-        /* Context size is for future use. Right now, we only make sure
-         * we are passed something we understand
-         */
-        if (ctx_size < sizeof(struct ucontext))
-                return -EINVAL;
-
-        if (old_ctx != NULL) {
-                if (!access_ok(VERIFY_WRITE, old_ctx, sizeof(*old_ctx))
-                    || save_user_regs(regs, &old_ctx->uc_mcontext, 0)
-                    || __copy_to_user(&old_ctx->uc_sigmask,
-                                      &current->blocked, sizeof(sigset_t))
-                    || __put_user(&old_ctx->uc_mcontext, &old_ctx->uc_regs))
-                        return -EFAULT;
-        }
-        if (new_ctx == NULL)
-                return 0;
-        if (!access_ok(VERIFY_READ, new_ctx, sizeof(*new_ctx))
-            || __get_user(tmp, (u8 __user *) new_ctx)
-            || __get_user(tmp, (u8 __user *) (new_ctx + 1) - 1))
-                return -EFAULT;
-
-        /*
-         * If we get a fault copying the context into the kernel's
-         * image of the user's registers, we can't just return -EFAULT
-         * because the user's registers will be corrupted.  For instance
-         * the NIP value may have been updated but not some of the
-         * other registers.  Given that we have done the access_ok
-         * and successfully read the first and last bytes of the region
-         * above, this should only happen in an out-of-memory situation
-         * or if another thread unmaps the region containing the context.
-         * We kill the task with a SIGSEGV in this situation.
-         */
-        if (do_setcontext(new_ctx, regs, 0))
-                do_exit(SIGSEGV);
-        sigreturn_exit(regs);
-        /* doesn't actually return back to here */
-        return 0;
-}
-
-int sys_rt_sigreturn(int r3, int r4, int r5, int r6, int r7, int r8,
-                     struct pt_regs *regs)
-{
-        struct rt_sigframe __user *rt_sf;
-
-        /* Always make any pending restarted system calls return -EINTR */
-        current_thread_info()->restart_block.fn = do_no_restart_syscall;
-
-        rt_sf = (struct rt_sigframe __user *)
-                (regs->gpr[1] + __SIGNAL_FRAMESIZE + 16);
-        if (!access_ok(VERIFY_READ, rt_sf, sizeof(struct rt_sigframe)))
-                goto bad;
-        if (do_setcontext(&rt_sf->uc, regs, 1))
-                goto bad;
-
-        /*
-         * It's not clear whether or why it is desirable to save the
-         * sigaltstack setting on signal delivery and restore it on
-         * signal return.  But other architectures do this and we have
-         * always done it up until now so it is probably better not to
-         * change it.  -- paulus
-         */
-        do_sigaltstack(&rt_sf->uc.uc_stack, NULL, regs->gpr[1]);
-
-        sigreturn_exit(regs);           /* doesn't return here */
-        return 0;
-
- bad:
-        force_sig(SIGSEGV, current);
-        return 0;
-}
-
-int sys_debug_setcontext(struct ucontext __user *ctx,
-                         int ndbg, struct sig_dbg_op __user *dbg,
-                         int r6, int r7, int r8,
-                         struct pt_regs *regs)
-{
-        struct sig_dbg_op op;
-        int i;
-        unsigned long new_msr = regs->msr;
-#if defined(CONFIG_4xx) || defined(CONFIG_BOOKE)
-        unsigned long new_dbcr0 = current->thread.dbcr0;
-#endif
-
-        for (i=0; i<ndbg; i++) {
-                if (__copy_from_user(&op, dbg, sizeof(op)))
-                        return -EFAULT;
-                switch (op.dbg_type) {
-                case SIG_DBG_SINGLE_STEPPING:
-#if defined(CONFIG_4xx) || defined(CONFIG_BOOKE)
-                        if (op.dbg_value) {
-                                new_msr |= MSR_DE;
-                                new_dbcr0 |= (DBCR0_IDM | DBCR0_IC);
-                        } else {
-                                new_msr &= ~MSR_DE;
-                                new_dbcr0 &= ~(DBCR0_IDM | DBCR0_IC);
-                        }
-#else
-                        if (op.dbg_value)
-                                new_msr |= MSR_SE;
-                        else
-                                new_msr &= ~MSR_SE;
-#endif
-                        break;
-                case SIG_DBG_BRANCH_TRACING:
-#if defined(CONFIG_4xx) || defined(CONFIG_BOOKE)
-                        return -EINVAL;
-#else
-                        if (op.dbg_value)
-                                new_msr |= MSR_BE;
-                        else
-                                new_msr &= ~MSR_BE;
-#endif
-                        break;
-
-                default:
-                        return -EINVAL;
-                }
-        }
-
-        /* We wait until here to actually install the values in the
-           registers so if we fail in the above loop, it will not
-           affect the contents of these registers.  After this point,
-           failure is a problem, anyway, and it's very unlikely unless
-           the user is really doing something wrong. */
-        regs->msr = new_msr;
-#if defined(CONFIG_4xx) || defined(CONFIG_BOOKE)
-        current->thread.dbcr0 = new_dbcr0;
-#endif
-
-        /*
-         * If we get a fault copying the context into the kernel's
-         * image of the user's registers, we can't just return -EFAULT
-         * because the user's registers will be corrupted.  For instance
-         * the NIP value may have been updated but not some of the
-         * other registers.  Given that we have done the access_ok
-         * and successfully read the first and last bytes of the region
-         * above, this should only happen in an out-of-memory situation
-         * or if another thread unmaps the region containing the context.
-         * We kill the task with a SIGSEGV in this situation.
-         */
-        if (do_setcontext(ctx, regs, 1)) {
-                force_sig(SIGSEGV, current);
-                goto out;
-        }
-
-        /*
-         * It's not clear whether or why it is desirable to save the
-         * sigaltstack setting on signal delivery and restore it on
-         * signal return.  But other architectures do this and we have
-         * always done it up until now so it is probably better not to
-         * change it.  -- paulus
-         */
-        do_sigaltstack(&ctx->uc_stack, NULL, regs->gpr[1]);
-
-        sigreturn_exit(regs);
-        /* doesn't actually return back to here */
-
- out:
-        return 0;
-}
-
-/*
- * OK, we're invoking a handler
- */
-static void
-handle_signal(unsigned long sig, struct k_sigaction *ka,
-              siginfo_t *info, sigset_t *oldset, struct pt_regs * regs,
-              unsigned long newsp)
-{
-        struct sigcontext __user *sc;
-        struct sigregs __user *frame;
-        unsigned long origsp = newsp;
-
-        /* Set up Signal Frame */
-        newsp -= sizeof(struct sigregs);
-        frame = (struct sigregs __user *) newsp;
-
-        /* Put a sigcontext on the stack */
-        newsp -= sizeof(*sc);
-        sc = (struct sigcontext __user *) newsp;
-
-        /* create a stack frame for the caller of the handler */
-        newsp -= __SIGNAL_FRAMESIZE;
-
-        if (!access_ok(VERIFY_WRITE, (void __user *) newsp, origsp - newsp))
-                goto badframe;
-
-#if _NSIG != 64
-#error "Please adjust handle_signal()"
-#endif
-        if (__put_user((unsigned long) ka->sa.sa_handler, &sc->handler)
-            || __put_user(oldset->sig[0], &sc->oldmask)
-            || __put_user(oldset->sig[1], &sc->_unused[3])
-            || __put_user((struct pt_regs __user *)frame, &sc->regs)
-            || __put_user(sig, &sc->signal))
-                goto badframe;
-
-        if (save_user_regs(regs, &frame->mctx, __NR_sigreturn))
-                goto badframe;
-
-        if (put_user(regs->gpr[1], (unsigned long __user *)newsp))
-                goto badframe;
-        regs->gpr[1] = newsp;
-        regs->gpr[3] = sig;
-        regs->gpr[4] = (unsigned long) sc;
-        regs->nip = (unsigned long) ka->sa.sa_handler;
-        regs->link = (unsigned long) frame->mctx.tramp;
-        regs->trap = 0;
-
-        return;
-
-badframe:
-#ifdef DEBUG_SIG
-        printk("badframe in handle_signal, regs=%p frame=%p newsp=%lx\n",
-               regs, frame, newsp);
-#endif
-        force_sigsegv(sig, current);
-}
-
-/*
- * Do a signal return; undo the signal stack.
- */
-int sys_sigreturn(int r3, int r4, int r5, int r6, int r7, int r8,
-                  struct pt_regs *regs)
-{
-        struct sigcontext __user *sc;
-        struct sigcontext sigctx;
-        struct mcontext __user *sr;
-        sigset_t set;
-
-        /* Always make any pending restarted system calls return -EINTR */
-        current_thread_info()->restart_block.fn = do_no_restart_syscall;
-
-        sc = (struct sigcontext __user *)(regs->gpr[1] + __SIGNAL_FRAMESIZE);
-        if (copy_from_user(&sigctx, sc, sizeof(sigctx)))
-                goto badframe;
-
-        set.sig[0] = sigctx.oldmask;
-        set.sig[1] = sigctx._unused[3];
-        restore_sigmask(&set);
-
-        sr = (struct mcontext __user *) sigctx.regs;
-        if (!access_ok(VERIFY_READ, sr, sizeof(*sr))
-            || restore_user_regs(regs, sr, 1))
-                goto badframe;
-
-        sigreturn_exit(regs);           /* doesn't return */
-        return 0;
-
-badframe:
-        force_sig(SIGSEGV, current);
-        return 0;
-}
-
-/*
- * 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.
- */
-int do_signal(sigset_t *oldset, struct pt_regs *regs)
-{
-        siginfo_t info;
-        struct k_sigaction ka;
-        unsigned long frame, newsp;
-        int signr, ret;
-
-        if (try_to_freeze()) {
-                signr = 0;
-                if (!signal_pending(current))
-                        goto no_signal;
-        }
-
-        if (!oldset)
-                oldset = &current->blocked;
-
-        newsp = frame = 0;
-
-        signr = get_signal_to_deliver(&info, &ka, regs, NULL);
- no_signal:
-        if (TRAP(regs) == 0x0C00                /* System Call! */
-            && regs->ccr & 0x10000000           /* error signalled */
-            && ((ret = regs->gpr[3]) == ERESTARTSYS
-                || ret == ERESTARTNOHAND || ret == ERESTARTNOINTR
-                || ret == ERESTART_RESTARTBLOCK)) {
-
-                if (signr > 0
-                    && (ret == ERESTARTNOHAND || ret == ERESTART_RESTARTBLOCK
-                        || (ret == ERESTARTSYS
-                            && !(ka.sa.sa_flags & SA_RESTART)))) {
-                        /* make the system call return an EINTR error */
-                        regs->result = -EINTR;
-                        regs->gpr[3] = EINTR;
-                        /* note that the cr0.SO bit is already set */
-                } else {
-                        regs->nip -= 4; /* Back up & retry system call */
-                        regs->result = 0;
-                        regs->trap = 0;
-                        if (ret == ERESTART_RESTARTBLOCK)
-                                regs->gpr[0] = __NR_restart_syscall;
-                        else
-                                regs->gpr[3] = regs->orig_gpr3;
-                }
-        }
-
-        if (signr == 0)
-                return 0;               /* no signals delivered */
-
-        if ((ka.sa.sa_flags & SA_ONSTACK) && current->sas_ss_size
-            && !on_sig_stack(regs->gpr[1]))
-                newsp = current->sas_ss_sp + current->sas_ss_size;
-        else
-                newsp = regs->gpr[1];
-        newsp &= ~0xfUL;
-
-        /* Whee!  Actually deliver the signal.  */
-        if (ka.sa.sa_flags & SA_SIGINFO)
-                handle_rt_signal(signr, &ka, &info, oldset, regs, newsp);
-        else
-                handle_signal(signr, &ka, &info, oldset, regs, newsp);
-
-        spin_lock_irq(&current->sighand->siglock);
-        sigorsets(&current->blocked,&current->blocked,&ka.sa.sa_mask);
-        if (!(ka.sa.sa_flags & SA_NODEFER))
-                sigaddset(&current->blocked, signr);
-        recalc_sigpending();
-        spin_unlock_irq(&current->sighand->siglock);
-
-        return 1;
-}
-
diff --git a/arch/ppc64/kernel/Makefile b/arch/ppc64/kernel/Makefile
index 0be7c7ecefdf..19846d78b329 100644
--- a/arch/ppc64/kernel/Makefile
+++ b/arch/ppc64/kernel/Makefile
@@ -15,7 +15,7 @@ obj-y               +=	irq.o idle.o dma.o \
                         time.o signal.o \
                         align.o bitops.o pacaData.o \
                         udbg.o ioctl32.o \
-                        ptrace32.o signal32.o rtc.o \
+                        ptrace32.o rtc.o \
                         cpu_setup_power4.o \
                         iommu.o sysfs.o vdso.o pmc.o firmware.o
 obj-y += vdso32/ vdso64/
diff --git a/include/asm-ppc64/ppc32.h b/include/asm-ppc64/ppc32.h
index 6b44a8caf395..3945a55d112a 100644
--- a/include/asm-ppc64/ppc32.h
+++ b/include/asm-ppc64/ppc32.h
@@ -70,18 +70,18 @@ typedef struct compat_siginfo {
 #define __old_sigaction32       old_sigaction32
 
 struct __old_sigaction32 {
-        unsigned                sa_handler;
+        compat_uptr_t           sa_handler;
         compat_old_sigset_t     sa_mask;
         unsigned int            sa_flags;
-        unsigned                sa_restorer;     /* not used by Linux/SPARC yet */
+        compat_uptr_t           sa_restorer;     /* not used by Linux/SPARC yet */
 };
 
 
 
 struct sigaction32 {
-       unsigned int  sa_handler;        /* Really a pointer, but need to deal with 32 bits */
+       compat_uptr_t  sa_handler;       /* Really a pointer, but need to deal with 32 bits */
        unsigned int sa_flags;
-       unsigned int sa_restorer;        /* Another 32 bit pointer */
+       compat_uptr_t sa_restorer;       /* Another 32 bit pointer */
        compat_sigset_t sa_mask;         /* A 32 bit mask */
 };
 
@@ -94,9 +94,9 @@ typedef struct sigaltstack_32 {
 struct sigcontext32 {
         unsigned int    _unused[4];
         int             signal;
-        unsigned int    handler;
+        compat_uptr_t   handler;
         unsigned int    oldmask;
-        u32 regs;  /* 4 byte pointer to the pt_regs32 structure. */
+        compat_uptr_t   regs;  /* 4 byte pointer to the pt_regs32 structure. */
 };
 
 struct mcontext32 {
@@ -111,7 +111,7 @@ struct ucontext32 {
         unsigned int            uc_link;
         stack_32_t              uc_stack;
         int                     uc_pad[7];
-        u32                     uc_regs;        /* points to uc_mcontext field */
+        compat_uptr_t           uc_regs;        /* points to uc_mcontext field */
         compat_sigset_t         uc_sigmask;     /* mask last for extensibility */
         /* glibc has 1024-bit signal masks, ours are 64-bit */
         int                     uc_maskext[30];