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

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

2 files changed, 1 insertions, 999 deletions

diff --git a/arch/ppc64/kernel/Makefile b/arch/ppc64/kernel/Makefile
index 0be7c7ecefd..19846d78b32 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/arch/ppc64/kernel/signal32.c b/arch/ppc64/kernel/signal32.c
deleted file mode 100644
index a8b7a5a56bb..00000000000
--- a/arch/ppc64/kernel/signal32.c
+++ /dev/null
@@ -1,998 +0,0 @@
-/*
- * signal32.c: Support 32bit signal syscalls.
- *
- * 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.
- *
- *      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/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>
-#include <linux/compat.h>
-#include <linux/ptrace.h>
-#include <asm/ppc32.h>
-#include <asm/uaccess.h>
-#include <asm/ppcdebug.h>
-#include <asm/unistd.h>
-#include <asm/cacheflush.h>
-#include <asm/vdso.h>
-
-#define DEBUG_SIG 0
-
-#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
-
-#define GP_REGS_SIZE32	min(sizeof(elf_gregset_t32), sizeof(struct pt_regs32))
-
-/*
- * 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
- *
- * Each of these things must be a multiple of 16 bytes in size.
- *
- */
-struct sigregs32 {
-	struct mcontext32	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_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
- *  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;
-	/*
-	 * 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];
-};
-
-
-/*
- * 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.
- */
-static int save_user_regs(struct pt_regs *regs, struct mcontext32 __user *frame, int sigret)
-{
-	elf_greg_t64 *gregs = (elf_greg_t64 *)regs;
-	int i, err = 0;
-
-	/* 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)
-		return 1;
-
-	current->thread.fpscr = 0;	/* turn off all fp exceptions */
-
-#ifdef CONFIG_ALTIVEC
-	/* save altivec registers */
-	if (current->thread.used_vr) {
-		flush_altivec_to_thread(current);
-		if (__copy_to_user(&frame->mc_vregs, current->thread.vr,
-				   ELF_NVRREG32 * 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 */
-
-	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 long restore_user_regs(struct pt_regs *regs,
-			      struct mcontext32 __user *sr, int sig)
-{
-	elf_greg_t64 *gregs = (elf_greg_t64 *)regs;
-	int i;
-	long err = 0;
-	unsigned int save_r2 = 0;
-#ifdef CONFIG_ALTIVEC
-	unsigned long msr;
-#endif
-
-	/*
-	 * restore general registers but not including MSR or SOFTE. Also
-	 * take care of keeping r2 (TLS) intact if not a signal
-	 */
-	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]);
-	}
-	if (!sig)
-		regs->gpr[2] = (unsigned long) save_r2;
-	if (err)
-		return 1;
-
-	/* 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_NVRREG32 * sizeof(vector128));
-
-	/* Always get VRSAVE back */
-	if (__get_user(current->thread.vrsave, (u32 __user *)&sr->mc_vregs[32]))
-		return 1;
-#endif /* CONFIG_ALTIVEC */
-
-#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;
-	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
- */
-
-
-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))
-		return -EINVAL;
-
-	if (act) {
-		compat_uptr_t handler;
-
-		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_user(new_ka.sa.sa_flags, &act->sa_flags);
-		if (ret)
-			return -EFAULT;
-	}
-
-	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_user(old_ka.sa.sa_flags, &oact->sa_flags);
-	}
-	return ret;
-}
-
-/*
- * Note: it is necessary to treat how as an unsigned int, with the
- * corresponding cast to a signed int to insure that the proper
- * conversion (sign extension) between the register representation
- * of a signed int (msr in 32-bit mode) and the register representation
- * of a signed int (msr in 64-bit mode) is performed.
- */
-long sys32_rt_sigprocmask(u32 how, compat_sigset_t __user *set,
-		compat_sigset_t __user *oset, size_t sigsetsize)
-{
-	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);
-	}
-	
-	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); 
-	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)))
-			return -EFAULT;
-	}
-	return 0;
-}
-
-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();
-
-	set_fs(KERNEL_DS);
-	/* The __user pointer cast is valid because of the set_fs() */
-	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)))
-			return -EFAULT;
-	}
-	return ret;
-}
-
-
-int copy_siginfo_to_user32(struct compat_siginfo __user *d, siginfo_t *s)
-{
-	int err;
-
-	if (!access_ok (VERIFY_WRITE, d, sizeof(*d)))
-		return -EFAULT;
-
-	/* If you change siginfo_t structure, please be sure
-	 * this code is fixed accordingly.
-	 * It should never copy any pad contained in the structure
-	 * to avoid security leaks, but must copy the generic
-	 * 3 ints plus the relevant union member.
-	 * This routine must convert siginfo from 64bit to 32bit as well
-	 * at the same time.
-	 */
-	err = __put_user(s->si_signo, &d->si_signo);
-	err |= __put_user(s->si_errno, &d->si_errno);
-	err |= __put_user((short)s->si_code, &d->si_code);
-	if (s->si_code < 0)
-		err |= __copy_to_user(&d->_sifields._pad, &s->_sifields._pad,
-				      SI_PAD_SIZE32);
-	else switch(s->si_code >> 16) {
-	case __SI_CHLD >> 16:
-		err |= __put_user(s->si_pid, &d->si_pid);
-		err |= __put_user(s->si_uid, &d->si_uid);
-		err |= __put_user(s->si_utime, &d->si_utime);
-		err |= __put_user(s->si_stime, &d->si_stime);
-		err |= __put_user(s->si_status, &d->si_status);
-		break;
-	case __SI_FAULT >> 16:
-		err |= __put_user((unsigned int)(unsigned long)s->si_addr,
-				  &d->si_addr);
-		break;
-	case __SI_POLL >> 16:
-		err |= __put_user(s->si_band, &d->si_band);
-		err |= __put_user(s->si_fd, &d->si_fd);
-		break;
-	case __SI_TIMER >> 16:
-		err |= __put_user(s->si_tid, &d->si_tid);
-		err |= __put_user(s->si_overrun, &d->si_overrun);
-		err |= __put_user(s->si_int, &d->si_int);
-		break;
-	case __SI_RT >> 16: /* This is not generated by the kernel as of now.  */
-	case __SI_MESGQ >> 16:
-		err |= __put_user(s->si_int, &d->si_int);
-		/* fallthrough */
-	case __SI_KILL >> 16:
-	default:
-		err |= __put_user(s->si_pid, &d->si_pid);
-		err |= __put_user(s->si_uid, &d->si_uid);
-		break;
-	}
-	return err;
-}
-
-/*
- * 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
- * (sign extension) between the register representation of a signed int
- * (msr in 32-bit mode) and the register representation of a signed int
- * (msr in 64-bit mode) is performed.
- */
-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;
-	set_fs (KERNEL_DS);
-	/* The __user pointer cast is valid becasuse of the set_fs() */
-	ret = sys_rt_sigqueueinfo((int)pid, (int)sig, (siginfo_t __user *) &info);
-	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
- *
- *  System Calls
- *       sigaltatck               sys32_sigaltstack
- */
-
-int sys32_sigaltstack(u32 __new, u32 __old, int r5,
-		      int r6, int r7, int r8, struct pt_regs *regs)
-{
-	stack_32_t __user * newstack = (stack_32_t __user *)(long) __new;
-	stack_32_t __user * oldstack = (stack_32_t __user *)(long) __old;
-	stack_t uss, uoss;
-	int ret;
-	mm_segment_t old_fs;
-	unsigned long sp;
-	compat_uptr_t ss_sp;
-
-	/*
-	 * set sp to the user stack on entry to the system call
-	 * the system call router sets R9 to the saved registers
-	 */
-	sp = regs->gpr[1];
-
-	/* Put new stack info in local 64 bit stack struct */
-	if (newstack) {
-		if (get_user(ss_sp, &newstack->ss_sp) ||
-		    __get_user(uss.ss_flags, &newstack->ss_flags) ||
-		    __get_user(uss.ss_size, &newstack->ss_size))
-			return -EFAULT;
-		uss.ss_sp = compat_ptr(ss_sp);
-	}
-
-	old_fs = get_fs();
-	set_fs(KERNEL_DS);
-	/* The __user pointer casts are valid because of the set_fs() */
-	ret = do_sigaltstack(
-		newstack ? (stack_t __user *) &uss : NULL,
-		oldstack ? (stack_t __user *) &uoss : NULL,
-		sp);
-	set_fs(old_fs);
-	/* Copy the stack information to the user output buffer */
-	if (!ret && oldstack  &&
-		(put_user((long)uoss.ss_sp, &oldstack->ss_sp) ||
-		 __put_user(uoss.ss_flags, &oldstack->ss_flags) ||
-		 __put_user(uoss.ss_size, &oldstack->ss_size)))
-		return -EFAULT;
-	return ret;
-}
-
-
-/*
- * 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)
-{
-	struct rt_sigframe32 __user *rt_sf;
-	struct mcontext32 __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;
-
-	/* create a stack frame for the caller of the handler */
-	newsp -= __SIGNAL_FRAMESIZE32 + 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)
-	    || __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)))
-		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;
-
-	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 {
-		if (save_user_regs(regs, frame, __NR_rt_sigreturn))
-			goto badframe;
-		regs->link = (unsigned long) frame->tramp;
-	}
-	regs->gpr[1] = (unsigned long) 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->trap = 0;
-	regs->result = 0;
-
-	if (test_thread_flag(TIF_SINGLESTEP))
-		ptrace_notify(SIGTRAP);
-
-	return 1;
-
-badframe:
-#if DEBUG_SIG
-	printk("badframe in handle_rt_signal, regs=%p frame=%p newsp=%lx\n",
-	       regs, frame, newsp);
-#endif
-	force_sigsegv(sig, current);
-	return 0;
-}
-
-static long do_setcontext32(struct ucontext32 __user *ucp, struct pt_regs *regs, int sig)
-{
-	compat_sigset_t c_set;
-	sigset_t set;
-	u32 mcp;
-
-	if (__copy_from_user(&c_set, &ucp->uc_sigmask, sizeof(c_set))
-	    || __get_user(mcp, &ucp->uc_regs))
-		return -EFAULT;
-	sigset_from_compat(&set, &c_set);
-	restore_sigmask(&set);
-	if (restore_user_regs(regs, (struct mcontext32 __user *)(u64)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,
-		       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))
-		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))
-			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_setcontext32(new_ctx, regs, 0))
-		do_exit(SIGSEGV);
-
-	return 0;
-}
-
-long sys32_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;
-
-
-	/* 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);
-	if (!access_ok(VERIFY_READ, rt_sf, sizeof(*rt_sf)))
-		goto bad;
-	if (do_setcontext32(&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
-	 * 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;
-
- bad:
-	force_sig(SIGSEGV, current);
-	return 0;
-}
-
-
-/*
- * 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)
-{
-	struct sigcontext32 __user *sc;
-	struct sigregs32 __user *frame;
-	unsigned long origsp = newsp;
-
-	/* Set up Signal Frame */
-	newsp -= sizeof(struct sigregs32);
-	frame = (struct sigregs32 __user *) newsp;
-
-	/* Put a sigcontext on the stack */
-	newsp -= sizeof(*sc);
-	sc = (struct sigcontext32 __user *) newsp;
-
-	/* create a stack frame for the caller of the handler */
-	newsp -= __SIGNAL_FRAMESIZE32;
-
-	if (!access_ok(VERIFY_WRITE, (void __user *) newsp, origsp - newsp))
-		goto badframe;
-
-#if _NSIG != 64
-#error "Please adjust handle_signal32()"
-#endif
-	if (__put_user((u32)(u64)ka->sa.sa_handler, &sc->handler)
-	    || __put_user(oldset->sig[0], &sc->oldmask)
-	    || __put_user((oldset->sig[0] >> 32), &sc->_unused[3])
-	    || __put_user((u32)(u64)frame, &sc->regs)
-	    || __put_user(sig, &sc->signal))
-		goto badframe;
-
-	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 {
-		if (save_user_regs(regs, &frame->mctx, __NR_sigreturn))
-			goto badframe;
-		regs->link = (unsigned long) frame->mctx.tramp;
-	}
-
-	if (put_user(regs->gpr[1], (u32 __user *)newsp))
-		goto badframe;
-	regs->gpr[1] = (unsigned long) newsp;
-	regs->gpr[3] = sig;
-	regs->gpr[4] = (unsigned long) sc;
-	regs->nip = (unsigned long) ka->sa.sa_handler;
-	regs->trap = 0;
-	regs->result = 0;
-
-	if (test_thread_flag(TIF_SINGLESTEP))
-		ptrace_notify(SIGTRAP);
-
-	return 1;
-
-badframe:
-#if DEBUG_SIG
-	printk("badframe in handle_signal, regs=%p frame=%x newsp=%x\n",
-	       regs, frame, *newspp);
-#endif
-	force_sigsegv(sig, current);
-	return 0;
-}
-
-/*
- * Do a signal return; undo the signal stack.
- */
-long sys32_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;
-	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);
-	if (copy_from_user(&sigctx, sc, sizeof(sigctx)))
-		goto badframe;
-
-	/*
-	 * 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);
-	restore_sigmask(&set);
-
-	sr = (struct mcontext32 __user *)(u64)sigctx.regs;
-	if (!access_ok(VERIFY_READ, sr, sizeof(*sr))
-	    || restore_user_regs(regs, sr, 1))
-		goto badframe;
-
-	ret = regs->result;
-	return ret;
-
-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)
-{
-	siginfo_t info;
-	unsigned int frame, newsp;
-	int signr, ret;
-	struct k_sigaction ka;
-
-	if (!oldset)
-		oldset = &current->blocked;
-
-	newsp = frame = 0;
-
-	signr = get_signal_to_deliver(&info, &ka, regs, NULL);
-
-	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;
-
-	/*
-	 * Reenable the DABR before delivering the signal to
-	 * user space. The DABR will have been cleared if it
-	 * triggered inside the kernel.
-	 */
-	if (current->thread.dabr)
-		set_dabr(current->thread.dabr);
-
-	/* Whee!  Actually deliver the signal.  */
-	if (ka.sa.sa_flags & SA_SIGINFO)
-		ret = handle_rt_signal32(signr, &ka, &info, oldset, regs, newsp);
-	else
-		ret = handle_signal32(signr, &ka, &info, oldset, regs, newsp);
-
-	if (ret) {
-		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 ret;
-}