Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 1469 insertions, 0 deletions

diff --git a/arch/sparc64/kernel/signal32.c b/arch/sparc64/kernel/signal32.c
new file mode 100644
index 000000000000..859255cf6762
--- /dev/null
+++ b/arch/sparc64/kernel/signal32.c
@@ -0,0 +1,1469 @@
+/*  $Id: signal32.c,v 1.74 2002/02/09 19:49:30 davem Exp $
+ *  arch/sparc64/kernel/signal32.c
+ *
+ *  Copyright (C) 1991, 1992  Linus Torvalds
+ *  Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
+ *  Copyright (C) 1996 Miguel de Icaza (miguel@nuclecu.unam.mx)
+ *  Copyright (C) 1997 Eddie C. Dost   (ecd@skynet.be)
+ *  Copyright (C) 1997,1998 Jakub Jelinek   (jj@sunsite.mff.cuni.cz)
+ */
+
+#include <linux/sched.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/mm.h>
+#include <linux/tty.h>
+#include <linux/smp_lock.h>
+#include <linux/binfmts.h>
+#include <linux/compat.h>
+#include <linux/bitops.h>
+
+#include <asm/uaccess.h>
+#include <asm/ptrace.h>
+#include <asm/svr4.h>
+#include <asm/pgtable.h>
+#include <asm/psrcompat.h>
+#include <asm/fpumacro.h>
+#include <asm/visasm.h>
+
+#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
+
+int do_signal32(sigset_t *oldset, struct pt_regs *regs,
+		unsigned long orig_o0, int ret_from_syscall);
+
+/* Signal frames: the original one (compatible with SunOS):
+ *
+ * Set up a signal frame... Make the stack look the way SunOS
+ * expects it to look which is basically:
+ *
+ * ---------------------------------- <-- %sp at signal time
+ * Struct sigcontext
+ * Signal address
+ * Ptr to sigcontext area above
+ * Signal code
+ * The signal number itself
+ * One register window
+ * ---------------------------------- <-- New %sp
+ */
+struct signal_sframe32 {
+	struct reg_window32 sig_window;
+	int sig_num;
+	int sig_code;
+	/* struct sigcontext32 * */ u32 sig_scptr;
+	int sig_address;
+	struct sigcontext32 sig_context;
+	unsigned int extramask[_COMPAT_NSIG_WORDS - 1];
+};
+
+/* This magic should be in g_upper[0] for all upper parts
+ * to be valid.
+ */
+#define SIGINFO_EXTRA_V8PLUS_MAGIC	0x130e269
+typedef struct {
+	unsigned int g_upper[8];
+	unsigned int o_upper[8];
+	unsigned int asi;
+} siginfo_extra_v8plus_t;
+
+/* 
+ * And the new one, intended to be used for Linux applications only
+ * (we have enough in there to work with clone).
+ * All the interesting bits are in the info field.
+ */
+struct new_signal_frame32 {
+	struct sparc_stackf32	ss;
+	__siginfo32_t		info;
+	/* __siginfo_fpu32_t * */ u32 fpu_save;
+	unsigned int		insns[2];
+	unsigned int		extramask[_COMPAT_NSIG_WORDS - 1];
+	unsigned int		extra_size; /* Should be sizeof(siginfo_extra_v8plus_t) */
+	/* Only valid if (info.si_regs.psr & (PSR_VERS|PSR_IMPL)) == PSR_V8PLUS */
+	siginfo_extra_v8plus_t	v8plus;
+	__siginfo_fpu_t		fpu_state;
+};
+
+typedef struct compat_siginfo{
+	int si_signo;
+	int si_errno;
+	int si_code;
+
+	union {
+		int _pad[SI_PAD_SIZE32];
+
+		/* kill() */
+		struct {
+			compat_pid_t _pid;		/* sender's pid */
+			unsigned int _uid;		/* sender's uid */
+		} _kill;
+
+		/* POSIX.1b timers */
+		struct {
+			timer_t _tid;			/* timer id */
+			int _overrun;			/* overrun count */
+			compat_sigval_t _sigval;		/* same as below */
+			int _sys_private;		/* not to be passed to user */
+		} _timer;
+
+		/* POSIX.1b signals */
+		struct {
+			compat_pid_t _pid;		/* sender's pid */
+			unsigned int _uid;		/* sender's uid */
+			compat_sigval_t _sigval;
+		} _rt;
+
+		/* SIGCHLD */
+		struct {
+			compat_pid_t _pid;		/* which child */
+			unsigned int _uid;		/* sender's uid */
+			int _status;			/* exit code */
+			compat_clock_t _utime;
+			compat_clock_t _stime;
+		} _sigchld;
+
+		/* SIGILL, SIGFPE, SIGSEGV, SIGBUS, SIGEMT */
+		struct {
+			u32 _addr; /* faulting insn/memory ref. */
+			int _trapno;
+		} _sigfault;
+
+		/* SIGPOLL */
+		struct {
+			int _band;	/* POLL_IN, POLL_OUT, POLL_MSG */
+			int _fd;
+		} _sigpoll;
+	} _sifields;
+}compat_siginfo_t;
+
+struct rt_signal_frame32 {
+	struct sparc_stackf32	ss;
+	compat_siginfo_t	info;
+	struct pt_regs32	regs;
+	compat_sigset_t		mask;
+	/* __siginfo_fpu32_t * */ u32 fpu_save;
+	unsigned int		insns[2];
+	stack_t32		stack;
+	unsigned int		extra_size; /* Should be sizeof(siginfo_extra_v8plus_t) */
+	/* Only valid if (regs.psr & (PSR_VERS|PSR_IMPL)) == PSR_V8PLUS */
+	siginfo_extra_v8plus_t	v8plus;
+	__siginfo_fpu_t		fpu_state;
+};
+
+/* Align macros */
+#define SF_ALIGNEDSZ  (((sizeof(struct signal_sframe32) + 7) & (~7)))
+#define NF_ALIGNEDSZ  (((sizeof(struct new_signal_frame32) + 7) & (~7)))
+#define RT_ALIGNEDSZ  (((sizeof(struct rt_signal_frame32) + 7) & (~7)))
+
+int copy_siginfo_to_user32(compat_siginfo_t __user *to, siginfo_t *from)
+{
+	int err;
+
+	if (!access_ok(VERIFY_WRITE, to, sizeof(compat_siginfo_t)))
+		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(from->si_signo, &to->si_signo);
+	err |= __put_user(from->si_errno, &to->si_errno);
+	err |= __put_user((short)from->si_code, &to->si_code);
+	if (from->si_code < 0)
+		err |= __copy_to_user(&to->_sifields._pad, &from->_sifields._pad, SI_PAD_SIZE);
+	else {
+		switch (from->si_code >> 16) {
+		case __SI_TIMER >> 16:
+			err |= __put_user(from->si_tid, &to->si_tid);
+			err |= __put_user(from->si_overrun, &to->si_overrun);
+			err |= __put_user(from->si_int, &to->si_int);
+			break;
+		case __SI_CHLD >> 16:
+			err |= __put_user(from->si_utime, &to->si_utime);
+			err |= __put_user(from->si_stime, &to->si_stime);
+			err |= __put_user(from->si_status, &to->si_status);
+		default:
+			err |= __put_user(from->si_pid, &to->si_pid);
+			err |= __put_user(from->si_uid, &to->si_uid);
+			break;
+		case __SI_FAULT >> 16:
+		case __SI_POLL >> 16:
+			err |= __put_user(from->si_trapno, &to->si_trapno);
+			err |= __put_user((unsigned long)from->si_addr, &to->si_addr);
+			break;
+		case __SI_RT >> 16: /* This is not generated by the kernel as of now.  */
+		case __SI_MESGQ >> 16:
+			err |= __put_user(from->si_pid, &to->si_pid);
+			err |= __put_user(from->si_uid, &to->si_uid);
+			err |= __put_user(from->si_int, &to->si_int);
+			break;
+		}
+	}
+	return err;
+}
+
+/* CAUTION: This is just a very minimalist implementation for the
+ *          sake of compat_sys_rt_sigqueueinfo()
+ */
+int copy_siginfo_from_user32(siginfo_t *to, compat_siginfo_t __user *from)
+{
+	if (!access_ok(VERIFY_WRITE, from, sizeof(compat_siginfo_t)))
+		return -EFAULT;
+
+	if (copy_from_user(to, from, 3*sizeof(int)) ||
+	    copy_from_user(to->_sifields._pad, from->_sifields._pad,
+			   SI_PAD_SIZE))
+		return -EFAULT;
+
+	return 0;
+}
+
+/*
+ * atomically swap in the new signal mask, and wait for a signal.
+ * This is really tricky on the Sparc, watch out...
+ */
+asmlinkage void _sigpause32_common(compat_old_sigset_t set, struct pt_regs *regs)
+{
+	sigset_t saveset;
+
+	set &= _BLOCKABLE;
+	spin_lock_irq(&current->sighand->siglock);
+	saveset = current->blocked;
+	siginitset(&current->blocked, set);
+	recalc_sigpending();
+	spin_unlock_irq(&current->sighand->siglock);
+	
+	regs->tpc = regs->tnpc;
+	regs->tnpc += 4;
+	if (test_thread_flag(TIF_32BIT)) {
+		regs->tpc &= 0xffffffff;
+		regs->tnpc &= 0xffffffff;
+	}
+
+	/* Condition codes and return value where set here for sigpause,
+	 * and so got used by setup_frame, which again causes sigreturn()
+	 * to return -EINTR.
+	 */
+	while (1) {
+		current->state = TASK_INTERRUPTIBLE;
+		schedule();
+		/*
+		 * Return -EINTR and set condition code here,
+		 * so the interrupted system call actually returns
+		 * these.
+		 */
+		regs->tstate |= TSTATE_ICARRY;
+		regs->u_regs[UREG_I0] = EINTR;
+		if (do_signal32(&saveset, regs, 0, 0))
+			return;
+	}
+}
+
+asmlinkage void do_rt_sigsuspend32(u32 uset, size_t sigsetsize, struct pt_regs *regs)
+{
+	sigset_t oldset, set;
+	compat_sigset_t set32;
+        
+	/* XXX: Don't preclude handling different sized sigset_t's.  */
+	if (((compat_size_t)sigsetsize) != sizeof(sigset_t)) {
+		regs->tstate |= TSTATE_ICARRY;
+		regs->u_regs[UREG_I0] = EINVAL;
+		return;
+	}
+	if (copy_from_user(&set32, compat_ptr(uset), sizeof(set32))) {
+		regs->tstate |= TSTATE_ICARRY;
+		regs->u_regs[UREG_I0] = EFAULT;
+		return;
+	}
+	switch (_NSIG_WORDS) {
+	case 4: set.sig[3] = set32.sig[6] + (((long)set32.sig[7]) << 32);
+	case 3: set.sig[2] = set32.sig[4] + (((long)set32.sig[5]) << 32);
+	case 2: set.sig[1] = set32.sig[2] + (((long)set32.sig[3]) << 32);
+	case 1: set.sig[0] = set32.sig[0] + (((long)set32.sig[1]) << 32);
+	}
+	sigdelsetmask(&set, ~_BLOCKABLE);
+	spin_lock_irq(&current->sighand->siglock);
+	oldset = current->blocked;
+	current->blocked = set;
+	recalc_sigpending();
+	spin_unlock_irq(&current->sighand->siglock);
+	
+	regs->tpc = regs->tnpc;
+	regs->tnpc += 4;
+	if (test_thread_flag(TIF_32BIT)) {
+		regs->tpc &= 0xffffffff;
+		regs->tnpc &= 0xffffffff;
+	}
+
+	/* Condition codes and return value where set here for sigpause,
+	 * and so got used by setup_frame, which again causes sigreturn()
+	 * to return -EINTR.
+	 */
+	while (1) {
+		current->state = TASK_INTERRUPTIBLE;
+		schedule();
+		/*
+		 * Return -EINTR and set condition code here,
+		 * so the interrupted system call actually returns
+		 * these.
+		 */
+		regs->tstate |= TSTATE_ICARRY;
+		regs->u_regs[UREG_I0] = EINTR;
+		if (do_signal32(&oldset, regs, 0, 0))
+			return;
+	}
+}
+
+static int restore_fpu_state32(struct pt_regs *regs, __siginfo_fpu_t __user *fpu)
+{
+	unsigned long *fpregs = current_thread_info()->fpregs;
+	unsigned long fprs;
+	int err;
+	
+	err = __get_user(fprs, &fpu->si_fprs);
+	fprs_write(0);
+	regs->tstate &= ~TSTATE_PEF;
+	if (fprs & FPRS_DL)
+		err |= copy_from_user(fpregs, &fpu->si_float_regs[0], (sizeof(unsigned int) * 32));
+	if (fprs & FPRS_DU)
+		err |= copy_from_user(fpregs+16, &fpu->si_float_regs[32], (sizeof(unsigned int) * 32));
+	err |= __get_user(current_thread_info()->xfsr[0], &fpu->si_fsr);
+	err |= __get_user(current_thread_info()->gsr[0], &fpu->si_gsr);
+	current_thread_info()->fpsaved[0] |= fprs;
+	return err;
+}
+
+void do_new_sigreturn32(struct pt_regs *regs)
+{
+	struct new_signal_frame32 __user *sf;
+	unsigned int psr;
+	unsigned pc, npc, fpu_save;
+	sigset_t set;
+	unsigned seta[_COMPAT_NSIG_WORDS];
+	int err, i;
+	
+	regs->u_regs[UREG_FP] &= 0x00000000ffffffffUL;
+	sf = (struct new_signal_frame32 __user *) regs->u_regs[UREG_FP];
+
+	/* 1. Make sure we are not getting garbage from the user */
+	if (!access_ok(VERIFY_READ, sf, sizeof(*sf)) ||
+	    (((unsigned long) sf) & 3))
+		goto segv;
+
+	get_user(pc, &sf->info.si_regs.pc);
+	__get_user(npc, &sf->info.si_regs.npc);
+
+	if ((pc | npc) & 3)
+		goto segv;
+
+	if (test_thread_flag(TIF_32BIT)) {
+		pc &= 0xffffffff;
+		npc &= 0xffffffff;
+	}
+	regs->tpc = pc;
+	regs->tnpc = npc;
+
+	/* 2. Restore the state */
+	err = __get_user(regs->y, &sf->info.si_regs.y);
+	err |= __get_user(psr, &sf->info.si_regs.psr);
+
+	for (i = UREG_G1; i <= UREG_I7; i++)
+		err |= __get_user(regs->u_regs[i], &sf->info.si_regs.u_regs[i]);
+	if ((psr & (PSR_VERS|PSR_IMPL)) == PSR_V8PLUS) {
+		err |= __get_user(i, &sf->v8plus.g_upper[0]);
+		if (i == SIGINFO_EXTRA_V8PLUS_MAGIC) {
+			unsigned long asi;
+
+			for (i = UREG_G1; i <= UREG_I7; i++)
+				err |= __get_user(((u32 *)regs->u_regs)[2*i], &sf->v8plus.g_upper[i]);
+			err |= __get_user(asi, &sf->v8plus.asi);
+			regs->tstate &= ~TSTATE_ASI;
+			regs->tstate |= ((asi & 0xffUL) << 24UL);
+		}
+	}
+
+	/* User can only change condition codes in %tstate. */
+	regs->tstate &= ~(TSTATE_ICC|TSTATE_XCC);
+	regs->tstate |= psr_to_tstate_icc(psr);
+
+	err |= __get_user(fpu_save, &sf->fpu_save);
+	if (fpu_save)
+		err |= restore_fpu_state32(regs, &sf->fpu_state);
+	err |= __get_user(seta[0], &sf->info.si_mask);
+	err |= copy_from_user(seta+1, &sf->extramask,
+			      (_COMPAT_NSIG_WORDS - 1) * sizeof(unsigned int));
+	if (err)
+	    	goto segv;
+	switch (_NSIG_WORDS) {
+		case 4: set.sig[3] = seta[6] + (((long)seta[7]) << 32);
+		case 3: set.sig[2] = seta[4] + (((long)seta[5]) << 32);
+		case 2: set.sig[1] = seta[2] + (((long)seta[3]) << 32);
+		case 1: set.sig[0] = seta[0] + (((long)seta[1]) << 32);
+	}
+	sigdelsetmask(&set, ~_BLOCKABLE);
+	spin_lock_irq(&current->sighand->siglock);
+	current->blocked = set;
+	recalc_sigpending();
+	spin_unlock_irq(&current->sighand->siglock);
+	return;
+
+segv:
+	force_sig(SIGSEGV, current);
+}
+
+asmlinkage void do_sigreturn32(struct pt_regs *regs)
+{
+	struct sigcontext32 __user *scptr;
+	unsigned int pc, npc, psr;
+	sigset_t set;
+	unsigned int seta[_COMPAT_NSIG_WORDS];
+	int err;
+
+	/* Always make any pending restarted system calls return -EINTR */
+	current_thread_info()->restart_block.fn = do_no_restart_syscall;
+
+	synchronize_user_stack();
+	if (test_thread_flag(TIF_NEWSIGNALS)) {
+		do_new_sigreturn32(regs);
+		return;
+	}
+
+	scptr = (struct sigcontext32 __user *)
+		(regs->u_regs[UREG_I0] & 0x00000000ffffffffUL);
+	/* Check sanity of the user arg. */
+	if (!access_ok(VERIFY_READ, scptr, sizeof(struct sigcontext32)) ||
+	    (((unsigned long) scptr) & 3))
+		goto segv;
+
+	err = __get_user(pc, &scptr->sigc_pc);
+	err |= __get_user(npc, &scptr->sigc_npc);
+
+	if ((pc | npc) & 3)
+		goto segv; /* Nice try. */
+
+	err |= __get_user(seta[0], &scptr->sigc_mask);
+	/* Note that scptr + 1 points to extramask */
+	err |= copy_from_user(seta+1, scptr + 1,
+			      (_COMPAT_NSIG_WORDS - 1) * sizeof(unsigned int));
+	if (err)
+	    	goto segv;
+	switch (_NSIG_WORDS) {
+		case 4: set.sig[3] = seta[6] + (((long)seta[7]) << 32);
+		case 3: set.sig[2] = seta[4] + (((long)seta[5]) << 32);
+		case 2: set.sig[1] = seta[2] + (((long)seta[3]) << 32);
+		case 1: set.sig[0] = seta[0] + (((long)seta[1]) << 32);
+	}
+	sigdelsetmask(&set, ~_BLOCKABLE);
+	spin_lock_irq(&current->sighand->siglock);
+	current->blocked = set;
+	recalc_sigpending();
+	spin_unlock_irq(&current->sighand->siglock);
+	
+	if (test_thread_flag(TIF_32BIT)) {
+		pc &= 0xffffffff;
+		npc &= 0xffffffff;
+	}
+	regs->tpc = pc;
+	regs->tnpc = npc;
+	err = __get_user(regs->u_regs[UREG_FP], &scptr->sigc_sp);
+	err |= __get_user(regs->u_regs[UREG_I0], &scptr->sigc_o0);
+	err |= __get_user(regs->u_regs[UREG_G1], &scptr->sigc_g1);
+
+	/* User can only change condition codes in %tstate. */
+	err |= __get_user(psr, &scptr->sigc_psr);
+	if (err)
+		goto segv;
+	regs->tstate &= ~(TSTATE_ICC|TSTATE_XCC);
+	regs->tstate |= psr_to_tstate_icc(psr);
+	return;
+
+segv:
+	force_sig(SIGSEGV, current);
+}
+
+asmlinkage void do_rt_sigreturn32(struct pt_regs *regs)
+{
+	struct rt_signal_frame32 __user *sf;
+	unsigned int psr, pc, npc, fpu_save, u_ss_sp;
+	mm_segment_t old_fs;
+	sigset_t set;
+	compat_sigset_t seta;
+	stack_t st;
+	int err, i;
+	
+	/* Always make any pending restarted system calls return -EINTR */
+	current_thread_info()->restart_block.fn = do_no_restart_syscall;
+
+	synchronize_user_stack();
+	regs->u_regs[UREG_FP] &= 0x00000000ffffffffUL;
+	sf = (struct rt_signal_frame32 __user *) regs->u_regs[UREG_FP];
+
+	/* 1. Make sure we are not getting garbage from the user */
+	if (!access_ok(VERIFY_READ, sf, sizeof(*sf)) ||
+	    (((unsigned long) sf) & 3))
+		goto segv;
+
+	get_user(pc, &sf->regs.pc);
+	__get_user(npc, &sf->regs.npc);
+
+	if ((pc | npc) & 3)
+		goto segv;
+
+	if (test_thread_flag(TIF_32BIT)) {
+		pc &= 0xffffffff;
+		npc &= 0xffffffff;
+	}
+	regs->tpc = pc;
+	regs->tnpc = npc;
+
+	/* 2. Restore the state */
+	err = __get_user(regs->y, &sf->regs.y);
+	err |= __get_user(psr, &sf->regs.psr);
+	
+	for (i = UREG_G1; i <= UREG_I7; i++)
+		err |= __get_user(regs->u_regs[i], &sf->regs.u_regs[i]);
+	if ((psr & (PSR_VERS|PSR_IMPL)) == PSR_V8PLUS) {
+		err |= __get_user(i, &sf->v8plus.g_upper[0]);
+		if (i == SIGINFO_EXTRA_V8PLUS_MAGIC) {
+			unsigned long asi;
+
+			for (i = UREG_G1; i <= UREG_I7; i++)
+				err |= __get_user(((u32 *)regs->u_regs)[2*i], &sf->v8plus.g_upper[i]);
+			err |= __get_user(asi, &sf->v8plus.asi);
+			regs->tstate &= ~TSTATE_ASI;
+			regs->tstate |= ((asi & 0xffUL) << 24UL);
+		}
+	}
+
+	/* User can only change condition codes in %tstate. */
+	regs->tstate &= ~(TSTATE_ICC|TSTATE_XCC);
+	regs->tstate |= psr_to_tstate_icc(psr);
+
+	err |= __get_user(fpu_save, &sf->fpu_save);
+	if (fpu_save)
+		err |= restore_fpu_state32(regs, &sf->fpu_state);
+	err |= copy_from_user(&seta, &sf->mask, sizeof(compat_sigset_t));
+	err |= __get_user(u_ss_sp, &sf->stack.ss_sp);
+	st.ss_sp = compat_ptr(u_ss_sp);
+	err |= __get_user(st.ss_flags, &sf->stack.ss_flags);
+	err |= __get_user(st.ss_size, &sf->stack.ss_size);
+	if (err)
+		goto segv;
+		
+	/* It is more difficult to avoid calling this function than to
+	   call it and ignore errors.  */
+	old_fs = get_fs();
+	set_fs(KERNEL_DS);
+	do_sigaltstack((stack_t __user *) &st, NULL, (unsigned long)sf);
+	set_fs(old_fs);
+	
+	switch (_NSIG_WORDS) {
+		case 4: set.sig[3] = seta.sig[6] + (((long)seta.sig[7]) << 32);
+		case 3: set.sig[2] = seta.sig[4] + (((long)seta.sig[5]) << 32);
+		case 2: set.sig[1] = seta.sig[2] + (((long)seta.sig[3]) << 32);
+		case 1: set.sig[0] = seta.sig[0] + (((long)seta.sig[1]) << 32);
+	}
+	sigdelsetmask(&set, ~_BLOCKABLE);
+	spin_lock_irq(&current->sighand->siglock);
+	current->blocked = set;
+	recalc_sigpending();
+	spin_unlock_irq(&current->sighand->siglock);
+	return;
+segv:
+	force_sig(SIGSEGV, current);
+}
+
+/* Checks if the fp is valid */
+static int invalid_frame_pointer(void __user *fp, int fplen)
+{
+	if ((((unsigned long) fp) & 7) || ((unsigned long)fp) > 0x100000000ULL - fplen)
+		return 1;
+	return 0;
+}
+
+static void __user *get_sigframe(struct sigaction *sa, struct pt_regs *regs, unsigned long framesize)
+{
+	unsigned long sp;
+	
+	regs->u_regs[UREG_FP] &= 0x00000000ffffffffUL;
+	sp = regs->u_regs[UREG_FP];
+	
+	/* This is the X/Open sanctioned signal stack switching.  */
+	if (sa->sa_flags & SA_ONSTACK) {
+		if (!on_sig_stack(sp) && !((current->sas_ss_sp + current->sas_ss_size) & 7))
+			sp = current->sas_ss_sp + current->sas_ss_size;
+	}
+	return (void __user *)(sp - framesize);
+}
+
+static void
+setup_frame32(struct sigaction *sa, struct pt_regs *regs, int signr, sigset_t *oldset, siginfo_t *info)
+{
+	struct signal_sframe32 __user *sframep;
+	struct sigcontext32 __user *sc;
+	unsigned int seta[_COMPAT_NSIG_WORDS];
+	int err = 0;
+	void __user *sig_address;
+	int sig_code;
+	unsigned long pc = regs->tpc;
+	unsigned long npc = regs->tnpc;
+	unsigned int psr;
+
+	if (test_thread_flag(TIF_32BIT)) {
+		pc &= 0xffffffff;
+		npc &= 0xffffffff;
+	}
+
+	synchronize_user_stack();
+	save_and_clear_fpu();
+
+	sframep = (struct signal_sframe32 __user *)
+		get_sigframe(sa, regs, SF_ALIGNEDSZ);
+	if (invalid_frame_pointer(sframep, sizeof(*sframep))){
+		/* Don't change signal code and address, so that
+		 * post mortem debuggers can have a look.
+		 */
+		do_exit(SIGILL);
+	}
+
+	sc = &sframep->sig_context;
+
+	/* We've already made sure frame pointer isn't in kernel space... */
+	err = __put_user((sas_ss_flags(regs->u_regs[UREG_FP]) == SS_ONSTACK),
+			 &sc->sigc_onstack);
+	
+	switch (_NSIG_WORDS) {
+	case 4: seta[7] = (oldset->sig[3] >> 32);
+	        seta[6] = oldset->sig[3];
+	case 3: seta[5] = (oldset->sig[2] >> 32);
+	        seta[4] = oldset->sig[2];
+	case 2: seta[3] = (oldset->sig[1] >> 32);
+	        seta[2] = oldset->sig[1];
+	case 1: seta[1] = (oldset->sig[0] >> 32);
+	        seta[0] = oldset->sig[0];
+	}
+	err |= __put_user(seta[0], &sc->sigc_mask);
+	err |= __copy_to_user(sframep->extramask, seta + 1,
+			      (_COMPAT_NSIG_WORDS - 1) * sizeof(unsigned int));
+	err |= __put_user(regs->u_regs[UREG_FP], &sc->sigc_sp);
+	err |= __put_user(pc, &sc->sigc_pc);
+	err |= __put_user(npc, &sc->sigc_npc);
+	psr = tstate_to_psr(regs->tstate);
+	if (current_thread_info()->fpsaved[0] & FPRS_FEF)
+		psr |= PSR_EF;
+	err |= __put_user(psr, &sc->sigc_psr);
+	err |= __put_user(regs->u_regs[UREG_G1], &sc->sigc_g1);
+	err |= __put_user(regs->u_regs[UREG_I0], &sc->sigc_o0);
+	err |= __put_user(get_thread_wsaved(), &sc->sigc_oswins);
+
+	err |= copy_in_user((u32 __user *)sframep,
+			    (u32 __user *)(regs->u_regs[UREG_FP]),
+			    sizeof(struct reg_window32));
+		       
+	set_thread_wsaved(0); /* So process is allowed to execute. */
+	err |= __put_user(signr, &sframep->sig_num);
+	sig_address = NULL;
+	sig_code = 0;
+	if (SI_FROMKERNEL (info) && (info->si_code & __SI_MASK) == __SI_FAULT) {
+		sig_address = info->si_addr;
+		switch (signr) {
+		case SIGSEGV:
+			switch (info->si_code) {
+			case SEGV_MAPERR: sig_code = SUBSIG_NOMAPPING; break;
+			default: sig_code = SUBSIG_PROTECTION; break;
+			}
+			break;
+		case SIGILL:
+			switch (info->si_code) {
+			case ILL_ILLOPC: sig_code = SUBSIG_ILLINST; break;
+			case ILL_PRVOPC: sig_code = SUBSIG_PRIVINST; break;
+			case ILL_ILLTRP: sig_code = SUBSIG_BADTRAP(info->si_trapno); break;
+			default: sig_code = SUBSIG_STACK; break;
+			}
+			break;
+		case SIGFPE:
+			switch (info->si_code) {
+			case FPE_INTDIV: sig_code = SUBSIG_IDIVZERO; break;
+			case FPE_INTOVF: sig_code = SUBSIG_FPINTOVFL; break;
+			case FPE_FLTDIV: sig_code = SUBSIG_FPDIVZERO; break;
+			case FPE_FLTOVF: sig_code = SUBSIG_FPOVFLOW; break;
+			case FPE_FLTUND: sig_code = SUBSIG_FPUNFLOW; break;
+			case FPE_FLTRES: sig_code = SUBSIG_FPINEXACT; break;
+			case FPE_FLTINV: sig_code = SUBSIG_FPOPERROR; break;
+			default: sig_code = SUBSIG_FPERROR; break;
+			}
+			break;
+		case SIGBUS:
+			switch (info->si_code) {
+			case BUS_ADRALN: sig_code = SUBSIG_ALIGNMENT; break;
+			case BUS_ADRERR: sig_code = SUBSIG_MISCERROR; break;
+			default: sig_code = SUBSIG_BUSTIMEOUT; break;
+			}
+			break;
+		case SIGEMT:
+			switch (info->si_code) {
+			case EMT_TAGOVF: sig_code = SUBSIG_TAG; break;
+			}
+			break;
+		case SIGSYS:
+			if (info->si_code == (__SI_FAULT|0x100)) {
+				/* See sys_sunos32.c */
+				sig_code = info->si_trapno;
+				break;
+			}
+		default:
+			sig_address = NULL;
+		}
+	}
+	err |= __put_user(ptr_to_compat(sig_address), &sframep->sig_address);
+	err |= __put_user(sig_code, &sframep->sig_code);
+	err |= __put_user(ptr_to_compat(sc), &sframep->sig_scptr);
+	if (err)
+		goto sigsegv;
+
+	regs->u_regs[UREG_FP] = (unsigned long) sframep;
+	regs->tpc = (unsigned long) sa->sa_handler;
+	regs->tnpc = (regs->tpc + 4);
+	if (test_thread_flag(TIF_32BIT)) {
+		regs->tpc &= 0xffffffff;
+		regs->tnpc &= 0xffffffff;
+	}
+	return;
+
+sigsegv:
+	force_sigsegv(signr, current);
+}
+
+
+static int save_fpu_state32(struct pt_regs *regs, __siginfo_fpu_t __user *fpu)
+{
+	unsigned long *fpregs = current_thread_info()->fpregs;
+	unsigned long fprs;
+	int err = 0;
+	
+	fprs = current_thread_info()->fpsaved[0];
+	if (fprs & FPRS_DL)
+		err |= copy_to_user(&fpu->si_float_regs[0], fpregs,
+				    (sizeof(unsigned int) * 32));
+	if (fprs & FPRS_DU)
+		err |= copy_to_user(&fpu->si_float_regs[32], fpregs+16,
+				    (sizeof(unsigned int) * 32));
+	err |= __put_user(current_thread_info()->xfsr[0], &fpu->si_fsr);
+	err |= __put_user(current_thread_info()->gsr[0], &fpu->si_gsr);
+	err |= __put_user(fprs, &fpu->si_fprs);
+
+	return err;
+}
+
+static void new_setup_frame32(struct k_sigaction *ka, struct pt_regs *regs,
+			      int signo, sigset_t *oldset)
+{
+	struct new_signal_frame32 __user *sf;
+	int sigframe_size;
+	u32 psr;
+	int i, err;
+	unsigned int seta[_COMPAT_NSIG_WORDS];
+
+	/* 1. Make sure everything is clean */
+	synchronize_user_stack();
+	save_and_clear_fpu();
+	
+	sigframe_size = NF_ALIGNEDSZ;
+	if (!(current_thread_info()->fpsaved[0] & FPRS_FEF))
+		sigframe_size -= sizeof(__siginfo_fpu_t);
+
+	sf = (struct new_signal_frame32 __user *)
+		get_sigframe(&ka->sa, regs, sigframe_size);
+	
+	if (invalid_frame_pointer(sf, sigframe_size))
+		goto sigill;
+
+	if (get_thread_wsaved() != 0)
+		goto sigill;
+
+	/* 2. Save the current process state */
+	if (test_thread_flag(TIF_32BIT)) {
+		regs->tpc &= 0xffffffff;
+		regs->tnpc &= 0xffffffff;
+	}
+	err  = put_user(regs->tpc, &sf->info.si_regs.pc);
+	err |= __put_user(regs->tnpc, &sf->info.si_regs.npc);
+	err |= __put_user(regs->y, &sf->info.si_regs.y);
+	psr = tstate_to_psr(regs->tstate);
+	if (current_thread_info()->fpsaved[0] & FPRS_FEF)
+		psr |= PSR_EF;
+	err |= __put_user(psr, &sf->info.si_regs.psr);
+	for (i = 0; i < 16; i++)
+		err |= __put_user(regs->u_regs[i], &sf->info.si_regs.u_regs[i]);
+	err |= __put_user(sizeof(siginfo_extra_v8plus_t), &sf->extra_size);
+	err |= __put_user(SIGINFO_EXTRA_V8PLUS_MAGIC, &sf->v8plus.g_upper[0]);
+	for (i = 1; i < 16; i++)
+		err |= __put_user(((u32 *)regs->u_regs)[2*i],
+				  &sf->v8plus.g_upper[i]);
+	err |= __put_user((regs->tstate & TSTATE_ASI) >> 24UL,
+			  &sf->v8plus.asi);
+
+	if (psr & PSR_EF) {
+		err |= save_fpu_state32(regs, &sf->fpu_state);
+		err |= __put_user((u64)&sf->fpu_state, &sf->fpu_save);
+	} else {
+		err |= __put_user(0, &sf->fpu_save);
+	}
+
+	switch (_NSIG_WORDS) {
+	case 4: seta[7] = (oldset->sig[3] >> 32);
+	        seta[6] = oldset->sig[3];
+	case 3: seta[5] = (oldset->sig[2] >> 32);
+	        seta[4] = oldset->sig[2];
+	case 2: seta[3] = (oldset->sig[1] >> 32);
+	        seta[2] = oldset->sig[1];
+	case 1: seta[1] = (oldset->sig[0] >> 32);
+	        seta[0] = oldset->sig[0];
+	}
+	err |= __put_user(seta[0], &sf->info.si_mask);
+	err |= __copy_to_user(sf->extramask, seta + 1,
+			      (_COMPAT_NSIG_WORDS - 1) * sizeof(unsigned int));
+
+	err |= copy_in_user((u32 __user *)sf,
+			    (u32 __user *)(regs->u_regs[UREG_FP]),
+			    sizeof(struct reg_window32));
+	
+	if (err)
+		goto sigsegv;
+
+	/* 3. signal handler back-trampoline and parameters */
+	regs->u_regs[UREG_FP] = (unsigned long) sf;
+	regs->u_regs[UREG_I0] = signo;
+	regs->u_regs[UREG_I1] = (unsigned long) &sf->info;
+	regs->u_regs[UREG_I2] = (unsigned long) &sf->info;
+
+	/* 4. signal handler */
+	regs->tpc = (unsigned long) ka->sa.sa_handler;
+	regs->tnpc = (regs->tpc + 4);
+	if (test_thread_flag(TIF_32BIT)) {
+		regs->tpc &= 0xffffffff;
+		regs->tnpc &= 0xffffffff;
+	}
+
+	/* 5. return to kernel instructions */
+	if (ka->ka_restorer) {
+		regs->u_regs[UREG_I7] = (unsigned long)ka->ka_restorer;
+	} else {
+		/* Flush instruction space. */
+		unsigned long address = ((unsigned long)&(sf->insns[0]));
+		pgd_t *pgdp = pgd_offset(current->mm, address);
+		pud_t *pudp = pud_offset(pgdp, address);
+		pmd_t *pmdp = pmd_offset(pudp, address);
+		pte_t *ptep;
+
+		regs->u_regs[UREG_I7] = (unsigned long) (&(sf->insns[0]) - 2);
+	
+		err  = __put_user(0x821020d8, &sf->insns[0]); /*mov __NR_sigreturn, %g1*/
+		err |= __put_user(0x91d02010, &sf->insns[1]); /*t 0x10*/
+		if (err)
+			goto sigsegv;
+
+		preempt_disable();
+		ptep = pte_offset_map(pmdp, address);
+		if (pte_present(*ptep)) {
+			unsigned long page = (unsigned long)
+				page_address(pte_page(*ptep));
+
+			__asm__ __volatile__(
+			"	membar	#StoreStore\n"
+			"	flush	%0 + %1"
+			: : "r" (page), "r" (address & (PAGE_SIZE - 1))
+			: "memory");
+		}
+		pte_unmap(ptep);
+		preempt_enable();
+	}
+	return;
+
+sigill:
+	do_exit(SIGILL);
+sigsegv:
+	force_sigsegv(signo, current);
+}
+
+/* Setup a Solaris stack frame */
+static void
+setup_svr4_frame32(struct sigaction *sa, unsigned long pc, unsigned long npc,
+		   struct pt_regs *regs, int signr, sigset_t *oldset)
+{
+	svr4_signal_frame_t __user *sfp;
+	svr4_gregset_t  __user *gr;
+	svr4_siginfo_t  __user *si;
+	svr4_mcontext_t __user *mc;
+	svr4_gwindows_t __user *gw;
+	svr4_ucontext_t __user *uc;
+	svr4_sigset_t setv;
+	unsigned int psr;
+	int i, err;
+
+	synchronize_user_stack();
+	save_and_clear_fpu();
+	
+	regs->u_regs[UREG_FP] &= 0x00000000ffffffffUL;
+	sfp = (svr4_signal_frame_t __user *)
+		get_sigframe(sa, regs,
+			     sizeof(struct reg_window32) + SVR4_SF_ALIGNED);
+
+	if (invalid_frame_pointer(sfp, sizeof(*sfp)))
+		do_exit(SIGILL);
+
+	/* Start with a clean frame pointer and fill it */
+	err = clear_user(sfp, sizeof(*sfp));
+
+	/* Setup convenience variables */
+	si = &sfp->si;
+	uc = &sfp->uc;
+	gw = &sfp->gw;
+	mc = &uc->mcontext;
+	gr = &mc->greg;
+	
+	/* FIXME: where am I supposed to put this?
+	 * sc->sigc_onstack = old_status;
+	 * anyways, it does not look like it is used for anything at all.
+	 */
+	setv.sigbits[0] = oldset->sig[0];
+	setv.sigbits[1] = (oldset->sig[0] >> 32);
+	if (_NSIG_WORDS >= 2) {
+		setv.sigbits[2] = oldset->sig[1];
+		setv.sigbits[3] = (oldset->sig[1] >> 32);
+		err |= __copy_to_user(&uc->sigmask, &setv, sizeof(svr4_sigset_t));
+	} else
+		err |= __copy_to_user(&uc->sigmask, &setv,
+				      2 * sizeof(unsigned int));
+	
+	/* Store registers */
+	if (test_thread_flag(TIF_32BIT)) {
+		regs->tpc &= 0xffffffff;
+		regs->tnpc &= 0xffffffff;
+	}
+	err |= __put_user(regs->tpc, &((*gr)[SVR4_PC]));
+	err |= __put_user(regs->tnpc, &((*gr)[SVR4_NPC]));
+	psr = tstate_to_psr(regs->tstate);
+	if (current_thread_info()->fpsaved[0] & FPRS_FEF)
+		psr |= PSR_EF;
+	err |= __put_user(psr, &((*gr)[SVR4_PSR]));
+	err |= __put_user(regs->y, &((*gr)[SVR4_Y]));
+	
+	/* Copy g[1..7] and o[0..7] registers */
+	for (i = 0; i < 7; i++)
+		err |= __put_user(regs->u_regs[UREG_G1+i], (&(*gr)[SVR4_G1])+i);
+	for (i = 0; i < 8; i++)
+		err |= __put_user(regs->u_regs[UREG_I0+i], (&(*gr)[SVR4_O0])+i);
+
+	/* Setup sigaltstack */
+	err |= __put_user(current->sas_ss_sp, &uc->stack.sp);
+	err |= __put_user(sas_ss_flags(regs->u_regs[UREG_FP]), &uc->stack.flags);
+	err |= __put_user(current->sas_ss_size, &uc->stack.size);
+
+	/* Save the currently window file: */
+
+	/* 1. Link sfp->uc->gwins to our windows */
+	err |= __put_user(ptr_to_compat(gw), &mc->gwin);
+	    
+	/* 2. Number of windows to restore at setcontext (): */
+	err |= __put_user(get_thread_wsaved(), &gw->count);
+
+	/* 3. We just pay attention to the gw->count field on setcontext */
+	set_thread_wsaved(0); /* So process is allowed to execute. */
+
+	/* Setup the signal information.  Solaris expects a bunch of
+	 * information to be passed to the signal handler, we don't provide
+	 * that much currently, should use siginfo.
+	 */
+	err |= __put_user(signr, &si->siginfo.signo);
+	err |= __put_user(SVR4_SINOINFO, &si->siginfo.code);
+	if (err)
+		goto sigsegv;
+
+	regs->u_regs[UREG_FP] = (unsigned long) sfp;
+	regs->tpc = (unsigned long) sa->sa_handler;
+	regs->tnpc = (regs->tpc + 4);
+	if (test_thread_flag(TIF_32BIT)) {
+		regs->tpc &= 0xffffffff;
+		regs->tnpc &= 0xffffffff;
+	}
+
+	/* Arguments passed to signal handler */
+	if (regs->u_regs[14]){
+		struct reg_window32 __user *rw = (struct reg_window32 __user *)
+			(regs->u_regs[14] & 0x00000000ffffffffUL);
+
+		err |= __put_user(signr, &rw->ins[0]);
+		err |= __put_user((u64)si, &rw->ins[1]);
+		err |= __put_user((u64)uc, &rw->ins[2]);
+		err |= __put_user((u64)sfp, &rw->ins[6]);	/* frame pointer */
+		if (err)
+			goto sigsegv;
+
+		regs->u_regs[UREG_I0] = signr;
+		regs->u_regs[UREG_I1] = (u32)(u64) si;
+		regs->u_regs[UREG_I2] = (u32)(u64) uc;
+	}
+	return;
+
+sigsegv:
+	force_sigsegv(signr, current);
+}
+
+asmlinkage int
+svr4_getcontext(svr4_ucontext_t __user *uc, struct pt_regs *regs)
+{
+	svr4_gregset_t  __user *gr;
+	svr4_mcontext_t __user *mc;
+	svr4_sigset_t setv;
+	int i, err;
+	u32 psr;
+
+	synchronize_user_stack();
+	save_and_clear_fpu();
+	
+	if (get_thread_wsaved())
+		do_exit(SIGSEGV);
+
+	err = clear_user(uc, sizeof(*uc));
+
+	/* Setup convenience variables */
+	mc = &uc->mcontext;
+	gr = &mc->greg;
+
+	setv.sigbits[0] = current->blocked.sig[0];
+	setv.sigbits[1] = (current->blocked.sig[0] >> 32);
+	if (_NSIG_WORDS >= 2) {
+		setv.sigbits[2] = current->blocked.sig[1];
+		setv.sigbits[3] = (current->blocked.sig[1] >> 32);
+		err |= __copy_to_user(&uc->sigmask, &setv, sizeof(svr4_sigset_t));
+	} else
+		err |= __copy_to_user(&uc->sigmask, &setv, 2 * sizeof(unsigned));
+
+	/* Store registers */
+	if (test_thread_flag(TIF_32BIT)) {
+		regs->tpc &= 0xffffffff;
+		regs->tnpc &= 0xffffffff;
+	}
+	err |= __put_user(regs->tpc, &uc->mcontext.greg[SVR4_PC]);
+	err |= __put_user(regs->tnpc, &uc->mcontext.greg[SVR4_NPC]);
+
+	psr = tstate_to_psr(regs->tstate) & ~PSR_EF;		   
+	if (current_thread_info()->fpsaved[0] & FPRS_FEF)
+		psr |= PSR_EF;
+	err |= __put_user(psr, &uc->mcontext.greg[SVR4_PSR]);
+
+	err |= __put_user(regs->y, &uc->mcontext.greg[SVR4_Y]);
+	
+	/* Copy g[1..7] and o[0..7] registers */
+	for (i = 0; i < 7; i++)
+		err |= __put_user(regs->u_regs[UREG_G1+i], (&(*gr)[SVR4_G1])+i);
+	for (i = 0; i < 8; i++)
+		err |= __put_user(regs->u_regs[UREG_I0+i], (&(*gr)[SVR4_O0])+i);
+
+	/* Setup sigaltstack */
+	err |= __put_user(current->sas_ss_sp, &uc->stack.sp);
+	err |= __put_user(sas_ss_flags(regs->u_regs[UREG_FP]), &uc->stack.flags);
+	err |= __put_user(current->sas_ss_size, &uc->stack.size);
+
+	/* The register file is not saved
+	 * we have already stuffed all of it with sync_user_stack
+	 */
+	return (err ? -EFAULT : 0);
+}
+
+
+/* Set the context for a svr4 application, this is Solaris way to sigreturn */
+asmlinkage int svr4_setcontext(svr4_ucontext_t __user *c, struct pt_regs *regs)
+{
+	svr4_gregset_t  __user *gr;
+	mm_segment_t old_fs;
+	u32 pc, npc, psr, u_ss_sp;
+	sigset_t set;
+	svr4_sigset_t setv;
+	int i, err;
+	stack_t st;
+	
+	/* Fixme: restore windows, or is this already taken care of in
+	 * svr4_setup_frame when sync_user_windows is done?
+	 */
+	flush_user_windows();
+	
+	if (get_thread_wsaved())
+		goto sigsegv;
+
+	if (((unsigned long) c) & 3){
+		printk("Unaligned structure passed\n");
+		goto sigsegv;
+	}
+
+	if (!__access_ok(c, sizeof(*c))) {
+		/* Miguel, add nice debugging msg _here_. ;-) */
+		goto sigsegv;
+	}
+
+	/* Check for valid PC and nPC */
+	gr = &c->mcontext.greg;
+	err = __get_user(pc, &((*gr)[SVR4_PC]));
+	err |= __get_user(npc, &((*gr)[SVR4_NPC]));
+	if ((pc | npc) & 3)
+		goto sigsegv;
+	
+	/* Retrieve information from passed ucontext */
+	/* note that nPC is ored a 1, this is used to inform entry.S */
+	/* that we don't want it to mess with our PC and nPC */
+	
+	err |= copy_from_user(&setv, &c->sigmask, sizeof(svr4_sigset_t));
+	set.sig[0] = setv.sigbits[0] | (((long)setv.sigbits[1]) << 32);
+	if (_NSIG_WORDS >= 2)
+		set.sig[1] = setv.sigbits[2] | (((long)setv.sigbits[3]) << 32);
+	
+	err |= __get_user(u_ss_sp, &c->stack.sp);
+	st.ss_sp = compat_ptr(u_ss_sp);
+	err |= __get_user(st.ss_flags, &c->stack.flags);
+	err |= __get_user(st.ss_size, &c->stack.size);
+	if (err)
+		goto sigsegv;
+		
+	/* It is more difficult to avoid calling this function than to
+	   call it and ignore errors.  */
+	old_fs = get_fs();
+	set_fs(KERNEL_DS);
+	do_sigaltstack((stack_t __user *) &st, NULL, regs->u_regs[UREG_I6]);
+	set_fs(old_fs);
+	
+	sigdelsetmask(&set, ~_BLOCKABLE);
+	spin_lock_irq(&current->sighand->siglock);
+	current->blocked = set;
+	recalc_sigpending();
+	spin_unlock_irq(&current->sighand->siglock);
+	regs->tpc = pc;
+	regs->tnpc = npc | 1;
+	if (test_thread_flag(TIF_32BIT)) {
+		regs->tpc &= 0xffffffff;
+		regs->tnpc &= 0xffffffff;
+	}
+	err |= __get_user(regs->y, &((*gr)[SVR4_Y]));
+	err |= __get_user(psr, &((*gr)[SVR4_PSR]));
+	regs->tstate &= ~(TSTATE_ICC|TSTATE_XCC);
+	regs->tstate |= psr_to_tstate_icc(psr);
+
+	/* Restore g[1..7] and o[0..7] registers */
+	for (i = 0; i < 7; i++)
+		err |= __get_user(regs->u_regs[UREG_G1+i], (&(*gr)[SVR4_G1])+i);
+	for (i = 0; i < 8; i++)
+		err |= __get_user(regs->u_regs[UREG_I0+i], (&(*gr)[SVR4_O0])+i);
+	if (err)
+		goto sigsegv;
+
+	return -EINTR;
+sigsegv:
+	return -EFAULT;
+}
+
+static void setup_rt_frame32(struct k_sigaction *ka, struct pt_regs *regs,
+			     unsigned long signr, sigset_t *oldset,
+			     siginfo_t *info)
+{
+	struct rt_signal_frame32 __user *sf;
+	int sigframe_size;
+	u32 psr;
+	int i, err;
+	compat_sigset_t seta;
+
+	/* 1. Make sure everything is clean */
+	synchronize_user_stack();
+	save_and_clear_fpu();
+	
+	sigframe_size = RT_ALIGNEDSZ;
+	if (!(current_thread_info()->fpsaved[0] & FPRS_FEF))
+		sigframe_size -= sizeof(__siginfo_fpu_t);
+
+	sf = (struct rt_signal_frame32 __user *)
+		get_sigframe(&ka->sa, regs, sigframe_size);
+	
+	if (invalid_frame_pointer(sf, sigframe_size))
+		goto sigill;
+
+	if (get_thread_wsaved() != 0)
+		goto sigill;
+
+	/* 2. Save the current process state */
+	if (test_thread_flag(TIF_32BIT)) {
+		regs->tpc &= 0xffffffff;
+		regs->tnpc &= 0xffffffff;
+	}
+	err  = put_user(regs->tpc, &sf->regs.pc);
+	err |= __put_user(regs->tnpc, &sf->regs.npc);
+	err |= __put_user(regs->y, &sf->regs.y);
+	psr = tstate_to_psr(regs->tstate);
+	if (current_thread_info()->fpsaved[0] & FPRS_FEF)
+		psr |= PSR_EF;
+	err |= __put_user(psr, &sf->regs.psr);
+	for (i = 0; i < 16; i++)
+		err |= __put_user(regs->u_regs[i], &sf->regs.u_regs[i]);
+	err |= __put_user(sizeof(siginfo_extra_v8plus_t), &sf->extra_size);
+	err |= __put_user(SIGINFO_EXTRA_V8PLUS_MAGIC, &sf->v8plus.g_upper[0]);
+	for (i = 1; i < 16; i++)
+		err |= __put_user(((u32 *)regs->u_regs)[2*i],
+				  &sf->v8plus.g_upper[i]);
+	err |= __put_user((regs->tstate & TSTATE_ASI) >> 24UL,
+			  &sf->v8plus.asi);
+
+	if (psr & PSR_EF) {
+		err |= save_fpu_state32(regs, &sf->fpu_state);
+		err |= __put_user((u64)&sf->fpu_state, &sf->fpu_save);
+	} else {
+		err |= __put_user(0, &sf->fpu_save);
+	}
+
+	/* Update the siginfo structure.  */
+	err |= copy_siginfo_to_user32(&sf->info, info);
+	
+	/* Setup sigaltstack */
+	err |= __put_user(current->sas_ss_sp, &sf->stack.ss_sp);
+	err |= __put_user(sas_ss_flags(regs->u_regs[UREG_FP]), &sf->stack.ss_flags);
+	err |= __put_user(current->sas_ss_size, &sf->stack.ss_size);
+
+	switch (_NSIG_WORDS) {
+	case 4: seta.sig[7] = (oldset->sig[3] >> 32);
+		seta.sig[6] = oldset->sig[3];
+	case 3: seta.sig[5] = (oldset->sig[2] >> 32);
+		seta.sig[4] = oldset->sig[2];
+	case 2: seta.sig[3] = (oldset->sig[1] >> 32);
+		seta.sig[2] = oldset->sig[1];
+	case 1: seta.sig[1] = (oldset->sig[0] >> 32);
+		seta.sig[0] = oldset->sig[0];
+	}
+	err |= __copy_to_user(&sf->mask, &seta, sizeof(compat_sigset_t));
+
+	err |= copy_in_user((u32 __user *)sf,
+			    (u32 __user *)(regs->u_regs[UREG_FP]),
+			    sizeof(struct reg_window32));
+	if (err)
+		goto sigsegv;
+	
+	/* 3. signal handler back-trampoline and parameters */
+	regs->u_regs[UREG_FP] = (unsigned long) sf;
+	regs->u_regs[UREG_I0] = signr;
+	regs->u_regs[UREG_I1] = (unsigned long) &sf->info;
+	regs->u_regs[UREG_I2] = (unsigned long) &sf->regs;
+
+	/* 4. signal handler */
+	regs->tpc = (unsigned long) ka->sa.sa_handler;
+	regs->tnpc = (regs->tpc + 4);
+	if (test_thread_flag(TIF_32BIT)) {
+		regs->tpc &= 0xffffffff;
+		regs->tnpc &= 0xffffffff;
+	}
+
+	/* 5. return to kernel instructions */
+	if (ka->ka_restorer)
+		regs->u_regs[UREG_I7] = (unsigned long)ka->ka_restorer;
+	else {
+		/* Flush instruction space. */
+		unsigned long address = ((unsigned long)&(sf->insns[0]));
+		pgd_t *pgdp = pgd_offset(current->mm, address);
+		pud_t *pudp = pud_offset(pgdp, address);
+		pmd_t *pmdp = pmd_offset(pudp, address);
+		pte_t *ptep;
+
+		regs->u_regs[UREG_I7] = (unsigned long) (&(sf->insns[0]) - 2);
+	
+		/* mov __NR_rt_sigreturn, %g1 */
+		err |= __put_user(0x82102065, &sf->insns[0]);
+
+		/* t 0x10 */
+		err |= __put_user(0x91d02010, &sf->insns[1]);
+		if (err)
+			goto sigsegv;
+
+		preempt_disable();
+		ptep = pte_offset_map(pmdp, address);
+		if (pte_present(*ptep)) {
+			unsigned long page = (unsigned long)
+				page_address(pte_page(*ptep));
+
+			__asm__ __volatile__(
+			"	membar	#StoreStore\n"
+			"	flush	%0 + %1"
+			: : "r" (page), "r" (address & (PAGE_SIZE - 1))
+			: "memory");
+		}
+		pte_unmap(ptep);
+		preempt_enable();
+	}
+	return;
+
+sigill:
+	do_exit(SIGILL);
+sigsegv:
+	force_sigsegv(signr, current);
+}
+
+static inline void handle_signal32(unsigned long signr, struct k_sigaction *ka,
+				   siginfo_t *info,
+				   sigset_t *oldset, struct pt_regs *regs,
+				   int svr4_signal)
+{
+	if (svr4_signal)
+		setup_svr4_frame32(&ka->sa, regs->tpc, regs->tnpc,
+				   regs, signr, oldset);
+	else {
+		if (ka->sa.sa_flags & SA_SIGINFO)
+			setup_rt_frame32(ka, regs, signr, oldset, info);
+		else if (test_thread_flag(TIF_NEWSIGNALS))
+			new_setup_frame32(ka, regs, signr, oldset);
+		else
+			setup_frame32(&ka->sa, regs, signr, oldset, info);
+	}
+	if (!(ka->sa.sa_flags & SA_NOMASK)) {
+		spin_lock_irq(&current->sighand->siglock);
+		sigorsets(&current->blocked,&current->blocked,&ka->sa.sa_mask);
+		sigaddset(&current->blocked,signr);
+		recalc_sigpending();
+		spin_unlock_irq(&current->sighand->siglock);
+	}
+}
+
+static inline void syscall_restart32(unsigned long orig_i0, struct pt_regs *regs,
+				     struct sigaction *sa)
+{
+	switch (regs->u_regs[UREG_I0]) {
+	case ERESTART_RESTARTBLOCK:
+	case ERESTARTNOHAND:
+	no_system_call_restart:
+		regs->u_regs[UREG_I0] = EINTR;
+		regs->tstate |= TSTATE_ICARRY;
+		break;
+	case ERESTARTSYS:
+		if (!(sa->sa_flags & SA_RESTART))
+			goto no_system_call_restart;
+		/* fallthrough */
+	case ERESTARTNOINTR:
+		regs->u_regs[UREG_I0] = orig_i0;
+		regs->tpc -= 4;
+		regs->tnpc -= 4;
+	}
+}
+
+/* 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,
+		unsigned long orig_i0, int restart_syscall)
+{
+	siginfo_t info;
+	struct signal_deliver_cookie cookie;
+	struct k_sigaction ka;
+	int signr;
+	int svr4_signal = current->personality == PER_SVR4;
+	
+	cookie.restart_syscall = restart_syscall;
+	cookie.orig_i0 = orig_i0;
+
+	signr = get_signal_to_deliver(&info, &ka, regs, &cookie);
+	if (signr > 0) {
+		if (cookie.restart_syscall)
+			syscall_restart32(orig_i0, regs, &ka.sa);
+		handle_signal32(signr, &ka, &info, oldset,
+				regs, svr4_signal);
+		return 1;
+	}
+	if (cookie.restart_syscall &&
+	    (regs->u_regs[UREG_I0] == ERESTARTNOHAND ||
+	     regs->u_regs[UREG_I0] == ERESTARTSYS ||
+	     regs->u_regs[UREG_I0] == ERESTARTNOINTR)) {
+		/* replay the system call when we are done */
+		regs->u_regs[UREG_I0] = cookie.orig_i0;
+		regs->tpc -= 4;
+		regs->tnpc -= 4;
+	}
+	if (cookie.restart_syscall &&
+	    regs->u_regs[UREG_I0] == ERESTART_RESTARTBLOCK) {
+		regs->u_regs[UREG_G1] = __NR_restart_syscall;
+		regs->tpc -= 4;
+		regs->tnpc -= 4;
+	}
+	return 0;
+}
+
+struct sigstack32 {
+	u32 the_stack;
+	int cur_status;
+};
+
+asmlinkage int do_sys32_sigstack(u32 u_ssptr, u32 u_ossptr, unsigned long sp)
+{
+	struct sigstack32 __user *ssptr =
+		(struct sigstack32 __user *)((unsigned long)(u_ssptr));
+	struct sigstack32 __user *ossptr =
+		(struct sigstack32 __user *)((unsigned long)(u_ossptr));
+	int ret = -EFAULT;
+
+	/* First see if old state is wanted. */
+	if (ossptr) {
+		if (put_user(current->sas_ss_sp + current->sas_ss_size,
+			     &ossptr->the_stack) ||
+		    __put_user(on_sig_stack(sp), &ossptr->cur_status))
+			goto out;
+	}
+	
+	/* Now see if we want to update the new state. */
+	if (ssptr) {
+		u32 ss_sp;
+
+		if (get_user(ss_sp, &ssptr->the_stack))
+			goto out;
+
+		/* If the current stack was set with sigaltstack, don't
+		 * swap stacks while we are on it.
+		 */
+		ret = -EPERM;
+		if (current->sas_ss_sp && on_sig_stack(sp))
+			goto out;
+			
+		/* Since we don't know the extent of the stack, and we don't
+		 * track onstack-ness, but rather calculate it, we must
+		 * presume a size.  Ho hum this interface is lossy.
+		 */
+		current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ;
+		current->sas_ss_size = SIGSTKSZ;
+	}
+	
+	ret = 0;
+out:
+	return ret;
+}
+
+asmlinkage long do_sys32_sigaltstack(u32 ussa, u32 uossa, unsigned long sp)
+{
+	stack_t uss, uoss;
+	u32 u_ss_sp = 0;
+	int ret;
+	mm_segment_t old_fs;
+	stack_t32 __user *uss32 = compat_ptr(ussa);
+	stack_t32 __user *uoss32 = compat_ptr(uossa);
+	
+	if (ussa && (get_user(u_ss_sp, &uss32->ss_sp) ||
+		    __get_user(uss.ss_flags, &uss32->ss_flags) ||
+		    __get_user(uss.ss_size, &uss32->ss_size)))
+		return -EFAULT;
+	uss.ss_sp = compat_ptr(u_ss_sp);
+	old_fs = get_fs();
+	set_fs(KERNEL_DS);
+	ret = do_sigaltstack(ussa ? (stack_t __user *) &uss : NULL,
+			     uossa ? (stack_t __user *) &uoss : NULL, sp);
+	set_fs(old_fs);
+	if (!ret && uossa && (put_user(ptr_to_compat(uoss.ss_sp), &uoss32->ss_sp) ||
+		    __put_user(uoss.ss_flags, &uoss32->ss_flags) ||
+		    __put_user(uoss.ss_size, &uoss32->ss_size)))
+		return -EFAULT;
+	return ret;
+}