Linux-2.6.12-rc2v2.6.12-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, 1036 insertions, 0 deletions

diff --git a/arch/ia64/ia32/ia32_signal.c b/arch/ia64/ia32/ia32_signal.c
new file mode 100644
index 000000000000..19b02adce68c
--- /dev/null
+++ b/arch/ia64/ia32/ia32_signal.c
@@ -0,0 +1,1036 @@
+/*
+ * IA32 Architecture-specific signal handling support.
+ *
+ * Copyright (C) 1999, 2001-2002, 2005 Hewlett-Packard Co
+ *	David Mosberger-Tang <davidm@hpl.hp.com>
+ * Copyright (C) 1999 Arun Sharma <arun.sharma@intel.com>
+ * Copyright (C) 2000 VA Linux Co
+ * Copyright (C) 2000 Don Dugger <n0ano@valinux.com>
+ *
+ * Derived from i386 and Alpha versions.
+ */
+
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/personality.h>
+#include <linux/ptrace.h>
+#include <linux/sched.h>
+#include <linux/signal.h>
+#include <linux/smp.h>
+#include <linux/smp_lock.h>
+#include <linux/stddef.h>
+#include <linux/syscalls.h>
+#include <linux/unistd.h>
+#include <linux/wait.h>
+#include <linux/compat.h>
+
+#include <asm/intrinsics.h>
+#include <asm/uaccess.h>
+#include <asm/rse.h>
+#include <asm/sigcontext.h>
+#include <asm/segment.h>
+
+#include "ia32priv.h"
+
+#include "../kernel/sigframe.h"
+
+#define A(__x)		((unsigned long)(__x))
+
+#define DEBUG_SIG	0
+#define _BLOCKABLE	(~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
+
+#define __IA32_NR_sigreturn            119
+#define __IA32_NR_rt_sigreturn         173
+
+struct sigframe_ia32
+{
+       int pretcode;
+       int sig;
+       struct sigcontext_ia32 sc;
+       struct _fpstate_ia32 fpstate;
+       unsigned int extramask[_COMPAT_NSIG_WORDS-1];
+       char retcode[8];
+};
+
+struct rt_sigframe_ia32
+{
+       int pretcode;
+       int sig;
+       int pinfo;
+       int puc;
+       compat_siginfo_t info;
+       struct ucontext_ia32 uc;
+       struct _fpstate_ia32 fpstate;
+       char retcode[8];
+};
+
+int
+copy_siginfo_from_user32 (siginfo_t *to, compat_siginfo_t __user *from)
+{
+	unsigned long tmp;
+	int err;
+
+	if (!access_ok(VERIFY_READ, from, sizeof(compat_siginfo_t)))
+		return -EFAULT;
+
+	err = __get_user(to->si_signo, &from->si_signo);
+	err |= __get_user(to->si_errno, &from->si_errno);
+	err |= __get_user(to->si_code, &from->si_code);
+
+	if (to->si_code < 0)
+		err |= __copy_from_user(&to->_sifields._pad, &from->_sifields._pad, SI_PAD_SIZE);
+	else {
+		switch (to->si_code >> 16) {
+		      case __SI_CHLD >> 16:
+			err |= __get_user(to->si_utime, &from->si_utime);
+			err |= __get_user(to->si_stime, &from->si_stime);
+			err |= __get_user(to->si_status, &from->si_status);
+		      default:
+			err |= __get_user(to->si_pid, &from->si_pid);
+			err |= __get_user(to->si_uid, &from->si_uid);
+			break;
+		      case __SI_FAULT >> 16:
+			err |= __get_user(tmp, &from->si_addr);
+			to->si_addr = (void __user *) tmp;
+			break;
+		      case __SI_POLL >> 16:
+			err |= __get_user(to->si_band, &from->si_band);
+			err |= __get_user(to->si_fd, &from->si_fd);
+			break;
+		      case __SI_RT >> 16: /* This is not generated by the kernel as of now.  */
+		      case __SI_MESGQ >> 16:
+			err |= __get_user(to->si_pid, &from->si_pid);
+			err |= __get_user(to->si_uid, &from->si_uid);
+			err |= __get_user(to->si_int, &from->si_int);
+			break;
+		}
+	}
+	return err;
+}
+
+int
+copy_siginfo_to_user32 (compat_siginfo_t __user *to, siginfo_t *from)
+{
+	unsigned int addr;
+	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_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:
+			/* avoid type-checking warnings by copying _pad[0] in lieu of si_addr... */
+			err |= __put_user(from->_sifields._pad[0], &to->si_addr);
+			break;
+		case __SI_POLL >> 16:
+			err |= __put_user(from->si_band, &to->si_band);
+			err |= __put_user(from->si_fd, &to->si_fd);
+			break;
+		case __SI_TIMER >> 16:
+			err |= __put_user(from->si_tid, &to->si_tid);
+			err |= __put_user(from->si_overrun, &to->si_overrun);
+			addr = (unsigned long) from->si_ptr;
+			err |= __put_user(addr, &to->si_ptr);
+			break;
+		case __SI_RT >> 16:	/* Not generated by the kernel as of now.  */
+		case __SI_MESGQ >> 16:
+			err |= __put_user(from->si_uid, &to->si_uid);
+			err |= __put_user(from->si_pid, &to->si_pid);
+			addr = (unsigned long) from->si_ptr;
+			err |= __put_user(addr, &to->si_ptr);
+			break;
+		}
+	}
+	return err;
+}
+
+
+/*
+ *  SAVE and RESTORE of ia32 fpstate info, from ia64 current state
+ *  Used in exception handler to pass the fpstate to the user, and restore
+ *  the fpstate while returning from the exception handler.
+ *
+ *    fpstate info and their mapping to IA64 regs:
+ *    fpstate    REG(BITS)      Attribute    Comments
+ *    cw         ar.fcr(0:12)                with bits 7 and 6 not used
+ *    sw         ar.fsr(0:15)
+ *    tag        ar.fsr(16:31)               with odd numbered bits not used
+ *                                           (read returns 0, writes ignored)
+ *    ipoff      ar.fir(0:31)
+ *    cssel      ar.fir(32:47)
+ *    dataoff    ar.fdr(0:31)
+ *    datasel    ar.fdr(32:47)
+ *
+ *    _st[(0+TOS)%8]   f8
+ *    _st[(1+TOS)%8]   f9
+ *    _st[(2+TOS)%8]   f10
+ *    _st[(3+TOS)%8]   f11                   (f8..f11 from ptregs)
+ *      : :            :                     (f12..f15 from live reg)
+ *      : :            :
+ *    _st[(7+TOS)%8]   f15                   TOS=sw.top(bits11:13)
+ *
+ *    status     Same as sw     RO
+ *    magic      0                           as X86_FXSR_MAGIC in ia32
+ *    mxcsr      Bits(7:15)=ar.fcr(39:47)
+ *               Bits(0:5) =ar.fsr(32:37)    with bit 6 reserved
+ *    _xmm[0..7] f16..f31                    (live registers)
+ *                                           with _xmm[0]
+ *                                             Bit(64:127)=f17(0:63)
+ *                                             Bit(0:63)=f16(0:63)
+ *    All other fields unused...
+ */
+
+static int
+save_ia32_fpstate_live (struct _fpstate_ia32 __user *save)
+{
+	struct task_struct *tsk = current;
+	struct pt_regs *ptp;
+	struct _fpreg_ia32 *fpregp;
+	char buf[32];
+	unsigned long fsr, fcr, fir, fdr;
+	unsigned long new_fsr;
+	unsigned long num128[2];
+	unsigned long mxcsr=0;
+	int fp_tos, fr8_st_map;
+
+	if (!access_ok(VERIFY_WRITE, save, sizeof(*save)))
+		return -EFAULT;
+
+	/* Read in fsr, fcr, fir, fdr and copy onto fpstate */
+	fsr = ia64_getreg(_IA64_REG_AR_FSR);
+	fcr = ia64_getreg(_IA64_REG_AR_FCR);
+	fir = ia64_getreg(_IA64_REG_AR_FIR);
+	fdr = ia64_getreg(_IA64_REG_AR_FDR);
+
+	/*
+	 * We need to clear the exception state before calling the signal handler. Clear
+	 * the bits 15, bits 0-7 in fp status word. Similar to the functionality of fnclex
+	 * instruction.
+	 */
+	new_fsr = fsr & ~0x80ff;
+	ia64_setreg(_IA64_REG_AR_FSR, new_fsr);
+
+	__put_user(fcr & 0xffff, &save->cw);
+	__put_user(fsr & 0xffff, &save->sw);
+	__put_user((fsr>>16) & 0xffff, &save->tag);
+	__put_user(fir, &save->ipoff);
+	__put_user((fir>>32) & 0xffff, &save->cssel);
+	__put_user(fdr, &save->dataoff);
+	__put_user((fdr>>32) & 0xffff, &save->datasel);
+	__put_user(fsr & 0xffff, &save->status);
+
+	mxcsr = ((fcr>>32) & 0xff80) | ((fsr>>32) & 0x3f);
+	__put_user(mxcsr & 0xffff, &save->mxcsr);
+	__put_user( 0, &save->magic); //#define X86_FXSR_MAGIC   0x0000
+
+	/*
+	 * save f8..f11  from pt_regs
+	 * save f12..f15 from live register set
+	 */
+	/*
+	 *  Find the location where f8 has to go in fp reg stack.  This depends on
+	 *  TOP(11:13) field of sw. Other f reg continue sequentially from where f8 maps
+	 *  to.
+	 */
+	fp_tos = (fsr>>11)&0x7;
+	fr8_st_map = (8-fp_tos)&0x7;
+	ptp = ia64_task_regs(tsk);
+	fpregp = (struct _fpreg_ia32 *)(((unsigned long)buf + 15) & ~15);
+	ia64f2ia32f(fpregp, &ptp->f8);
+	copy_to_user(&save->_st[(0+fr8_st_map)&0x7], fpregp, sizeof(struct _fpreg_ia32));
+	ia64f2ia32f(fpregp, &ptp->f9);
+	copy_to_user(&save->_st[(1+fr8_st_map)&0x7], fpregp, sizeof(struct _fpreg_ia32));
+	ia64f2ia32f(fpregp, &ptp->f10);
+	copy_to_user(&save->_st[(2+fr8_st_map)&0x7], fpregp, sizeof(struct _fpreg_ia32));
+	ia64f2ia32f(fpregp, &ptp->f11);
+	copy_to_user(&save->_st[(3+fr8_st_map)&0x7], fpregp, sizeof(struct _fpreg_ia32));
+
+	ia64_stfe(fpregp, 12);
+	copy_to_user(&save->_st[(4+fr8_st_map)&0x7], fpregp, sizeof(struct _fpreg_ia32));
+	ia64_stfe(fpregp, 13);
+	copy_to_user(&save->_st[(5+fr8_st_map)&0x7], fpregp, sizeof(struct _fpreg_ia32));
+	ia64_stfe(fpregp, 14);
+	copy_to_user(&save->_st[(6+fr8_st_map)&0x7], fpregp, sizeof(struct _fpreg_ia32));
+	ia64_stfe(fpregp, 15);
+	copy_to_user(&save->_st[(7+fr8_st_map)&0x7], fpregp, sizeof(struct _fpreg_ia32));
+
+	ia64_stf8(&num128[0], 16);
+	ia64_stf8(&num128[1], 17);
+	copy_to_user(&save->_xmm[0], num128, sizeof(struct _xmmreg_ia32));
+
+	ia64_stf8(&num128[0], 18);
+	ia64_stf8(&num128[1], 19);
+	copy_to_user(&save->_xmm[1], num128, sizeof(struct _xmmreg_ia32));
+
+	ia64_stf8(&num128[0], 20);
+	ia64_stf8(&num128[1], 21);
+	copy_to_user(&save->_xmm[2], num128, sizeof(struct _xmmreg_ia32));
+
+	ia64_stf8(&num128[0], 22);
+	ia64_stf8(&num128[1], 23);
+	copy_to_user(&save->_xmm[3], num128, sizeof(struct _xmmreg_ia32));
+
+	ia64_stf8(&num128[0], 24);
+	ia64_stf8(&num128[1], 25);
+	copy_to_user(&save->_xmm[4], num128, sizeof(struct _xmmreg_ia32));
+
+	ia64_stf8(&num128[0], 26);
+	ia64_stf8(&num128[1], 27);
+	copy_to_user(&save->_xmm[5], num128, sizeof(struct _xmmreg_ia32));
+
+	ia64_stf8(&num128[0], 28);
+	ia64_stf8(&num128[1], 29);
+	copy_to_user(&save->_xmm[6], num128, sizeof(struct _xmmreg_ia32));
+
+	ia64_stf8(&num128[0], 30);
+	ia64_stf8(&num128[1], 31);
+	copy_to_user(&save->_xmm[7], num128, sizeof(struct _xmmreg_ia32));
+	return 0;
+}
+
+static int
+restore_ia32_fpstate_live (struct _fpstate_ia32 __user *save)
+{
+	struct task_struct *tsk = current;
+	struct pt_regs *ptp;
+	unsigned int lo, hi;
+	unsigned long num128[2];
+	unsigned long num64, mxcsr;
+	struct _fpreg_ia32 *fpregp;
+	char buf[32];
+	unsigned long fsr, fcr, fir, fdr;
+	int fp_tos, fr8_st_map;
+
+	if (!access_ok(VERIFY_READ, save, sizeof(*save)))
+		return(-EFAULT);
+
+	/*
+	 * Updating fsr, fcr, fir, fdr.
+	 * Just a bit more complicated than save.
+	 * - Need to make sure that we don't write any value other than the
+	 *   specific fpstate info
+	 * - Need to make sure that the untouched part of frs, fdr, fir, fcr
+	 *   should remain same while writing.
+	 * So, we do a read, change specific fields and write.
+	 */
+	fsr = ia64_getreg(_IA64_REG_AR_FSR);
+	fcr = ia64_getreg(_IA64_REG_AR_FCR);
+	fir = ia64_getreg(_IA64_REG_AR_FIR);
+	fdr = ia64_getreg(_IA64_REG_AR_FDR);
+
+	__get_user(mxcsr, (unsigned int __user *)&save->mxcsr);
+	/* setting bits 0..5 8..12 with cw and 39..47 from mxcsr */
+	__get_user(lo, (unsigned int __user *)&save->cw);
+	num64 = mxcsr & 0xff10;
+	num64 = (num64 << 32) | (lo & 0x1f3f);
+	fcr = (fcr & (~0xff1000001f3fUL)) | num64;
+
+	/* setting bits 0..31 with sw and tag and 32..37 from mxcsr */
+	__get_user(lo, (unsigned int __user *)&save->sw);
+	/* set bits 15,7 (fsw.b, fsw.es) to reflect the current error status */
+	if ( !(lo & 0x7f) )
+		lo &= (~0x8080);
+	__get_user(hi, (unsigned int __user *)&save->tag);
+	num64 = mxcsr & 0x3f;
+	num64 = (num64 << 16) | (hi & 0xffff);
+	num64 = (num64 << 16) | (lo & 0xffff);
+	fsr = (fsr & (~0x3fffffffffUL)) | num64;
+
+	/* setting bits 0..47 with cssel and ipoff */
+	__get_user(lo, (unsigned int __user *)&save->ipoff);
+	__get_user(hi, (unsigned int __user *)&save->cssel);
+	num64 = hi & 0xffff;
+	num64 = (num64 << 32) | lo;
+	fir = (fir & (~0xffffffffffffUL)) | num64;
+
+	/* setting bits 0..47 with datasel and dataoff */
+	__get_user(lo, (unsigned int __user *)&save->dataoff);
+	__get_user(hi, (unsigned int __user *)&save->datasel);
+	num64 = hi & 0xffff;
+	num64 = (num64 << 32) | lo;
+	fdr = (fdr & (~0xffffffffffffUL)) | num64;
+
+	ia64_setreg(_IA64_REG_AR_FSR, fsr);
+	ia64_setreg(_IA64_REG_AR_FCR, fcr);
+	ia64_setreg(_IA64_REG_AR_FIR, fir);
+	ia64_setreg(_IA64_REG_AR_FDR, fdr);
+
+	/*
+	 * restore f8..f11 onto pt_regs
+	 * restore f12..f15 onto live registers
+	 */
+	/*
+	 *  Find the location where f8 has to go in fp reg stack.  This depends on
+	 *  TOP(11:13) field of sw. Other f reg continue sequentially from where f8 maps
+	 *  to.
+	 */
+	fp_tos = (fsr>>11)&0x7;
+	fr8_st_map = (8-fp_tos)&0x7;
+	fpregp = (struct _fpreg_ia32 *)(((unsigned long)buf + 15) & ~15);
+
+	ptp = ia64_task_regs(tsk);
+	copy_from_user(fpregp, &save->_st[(0+fr8_st_map)&0x7], sizeof(struct _fpreg_ia32));
+	ia32f2ia64f(&ptp->f8, fpregp);
+	copy_from_user(fpregp, &save->_st[(1+fr8_st_map)&0x7], sizeof(struct _fpreg_ia32));
+	ia32f2ia64f(&ptp->f9, fpregp);
+	copy_from_user(fpregp, &save->_st[(2+fr8_st_map)&0x7], sizeof(struct _fpreg_ia32));
+	ia32f2ia64f(&ptp->f10, fpregp);
+	copy_from_user(fpregp, &save->_st[(3+fr8_st_map)&0x7], sizeof(struct _fpreg_ia32));
+	ia32f2ia64f(&ptp->f11, fpregp);
+
+	copy_from_user(fpregp, &save->_st[(4+fr8_st_map)&0x7], sizeof(struct _fpreg_ia32));
+	ia64_ldfe(12, fpregp);
+	copy_from_user(fpregp, &save->_st[(5+fr8_st_map)&0x7], sizeof(struct _fpreg_ia32));
+	ia64_ldfe(13, fpregp);
+	copy_from_user(fpregp, &save->_st[(6+fr8_st_map)&0x7], sizeof(struct _fpreg_ia32));
+	ia64_ldfe(14, fpregp);
+	copy_from_user(fpregp, &save->_st[(7+fr8_st_map)&0x7], sizeof(struct _fpreg_ia32));
+	ia64_ldfe(15, fpregp);
+
+	copy_from_user(num128, &save->_xmm[0], sizeof(struct _xmmreg_ia32));
+	ia64_ldf8(16, &num128[0]);
+	ia64_ldf8(17, &num128[1]);
+
+	copy_from_user(num128, &save->_xmm[1], sizeof(struct _xmmreg_ia32));
+	ia64_ldf8(18, &num128[0]);
+	ia64_ldf8(19, &num128[1]);
+
+	copy_from_user(num128, &save->_xmm[2], sizeof(struct _xmmreg_ia32));
+	ia64_ldf8(20, &num128[0]);
+	ia64_ldf8(21, &num128[1]);
+
+	copy_from_user(num128, &save->_xmm[3], sizeof(struct _xmmreg_ia32));
+	ia64_ldf8(22, &num128[0]);
+	ia64_ldf8(23, &num128[1]);
+
+	copy_from_user(num128, &save->_xmm[4], sizeof(struct _xmmreg_ia32));
+	ia64_ldf8(24, &num128[0]);
+	ia64_ldf8(25, &num128[1]);
+
+	copy_from_user(num128, &save->_xmm[5], sizeof(struct _xmmreg_ia32));
+	ia64_ldf8(26, &num128[0]);
+	ia64_ldf8(27, &num128[1]);
+
+	copy_from_user(num128, &save->_xmm[6], sizeof(struct _xmmreg_ia32));
+	ia64_ldf8(28, &num128[0]);
+	ia64_ldf8(29, &num128[1]);
+
+	copy_from_user(num128, &save->_xmm[7], sizeof(struct _xmmreg_ia32));
+	ia64_ldf8(30, &num128[0]);
+	ia64_ldf8(31, &num128[1]);
+	return 0;
+}
+
+static inline void
+sigact_set_handler (struct k_sigaction *sa, unsigned int handler, unsigned int restorer)
+{
+	if (handler + 1 <= 2)
+		/* SIG_DFL, SIG_IGN, or SIG_ERR: must sign-extend to 64-bits */
+		sa->sa.sa_handler = (__sighandler_t) A((int) handler);
+	else
+		sa->sa.sa_handler = (__sighandler_t) (((unsigned long) restorer << 32) | handler);
+}
+
+long
+__ia32_rt_sigsuspend (compat_sigset_t *sset, unsigned int sigsetsize, struct sigscratch *scr)
+{
+	extern long ia64_do_signal (sigset_t *oldset, struct sigscratch *scr, long in_syscall);
+	sigset_t oldset, set;
+
+	scr->scratch_unat = 0;	/* avoid leaking kernel bits to user level */
+	memset(&set, 0, sizeof(&set));
+
+	if (memcpy(&set.sig, &sset->sig, sigsetsize))
+		return -EFAULT;
+
+	sigdelsetmask(&set, ~_BLOCKABLE);
+
+	spin_lock_irq(&current->sighand->siglock);
+	{
+		oldset = current->blocked;
+		current->blocked = set;
+		recalc_sigpending();
+	}
+	spin_unlock_irq(&current->sighand->siglock);
+
+	/*
+	 * The return below usually returns to the signal handler.  We need to pre-set the
+	 * correct error code here to ensure that the right values get saved in sigcontext
+	 * by ia64_do_signal.
+	 */
+	scr->pt.r8 = -EINTR;
+	while (1) {
+		current->state = TASK_INTERRUPTIBLE;
+		schedule();
+		if (ia64_do_signal(&oldset, scr, 1))
+			return -EINTR;
+	}
+}
+
+asmlinkage long
+ia32_rt_sigsuspend (compat_sigset_t __user *uset, unsigned int sigsetsize, struct sigscratch *scr)
+{
+	compat_sigset_t set;
+
+	if (sigsetsize > sizeof(compat_sigset_t))
+		return -EINVAL;
+
+	if (copy_from_user(&set.sig, &uset->sig, sigsetsize))
+		return -EFAULT;
+
+	return __ia32_rt_sigsuspend(&set, sigsetsize, scr);
+}
+
+asmlinkage long
+ia32_sigsuspend (unsigned int mask, struct sigscratch *scr)
+{
+	return __ia32_rt_sigsuspend((compat_sigset_t *) &mask, sizeof(mask), scr);
+}
+
+asmlinkage long
+sys32_signal (int sig, unsigned int handler)
+{
+	struct k_sigaction new_sa, old_sa;
+	int ret;
+
+	sigact_set_handler(&new_sa, handler, 0);
+	new_sa.sa.sa_flags = SA_ONESHOT | SA_NOMASK;
+
+	ret = do_sigaction(sig, &new_sa, &old_sa);
+
+	return ret ? ret : IA32_SA_HANDLER(&old_sa);
+}
+
+asmlinkage long
+sys32_rt_sigaction (int sig, struct sigaction32 __user *act,
+		    struct sigaction32 __user *oact, unsigned int sigsetsize)
+{
+	struct k_sigaction new_ka, old_ka;
+	unsigned int handler, restorer;
+	int ret;
+
+	/* XXX: Don't preclude handling different sized sigset_t's.  */
+	if (sigsetsize != sizeof(compat_sigset_t))
+		return -EINVAL;
+
+	if (act) {
+		ret = get_user(handler, &act->sa_handler);
+		ret |= get_user(new_ka.sa.sa_flags, &act->sa_flags);
+		ret |= get_user(restorer, &act->sa_restorer);
+		ret |= copy_from_user(&new_ka.sa.sa_mask, &act->sa_mask, sizeof(compat_sigset_t));
+		if (ret)
+			return -EFAULT;
+
+		sigact_set_handler(&new_ka, handler, restorer);
+	}
+
+	ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
+
+	if (!ret && oact) {
+		ret = put_user(IA32_SA_HANDLER(&old_ka), &oact->sa_handler);
+		ret |= put_user(old_ka.sa.sa_flags, &oact->sa_flags);
+		ret |= put_user(IA32_SA_RESTORER(&old_ka), &oact->sa_restorer);
+		ret |= copy_to_user(&oact->sa_mask, &old_ka.sa.sa_mask, sizeof(compat_sigset_t));
+	}
+	return ret;
+}
+
+
+asmlinkage long
+sys32_rt_sigprocmask (int how, compat_sigset_t __user *set, compat_sigset_t __user *oset,
+		      unsigned int sigsetsize)
+{
+	mm_segment_t old_fs = get_fs();
+	sigset_t s;
+	long ret;
+
+	if (sigsetsize > sizeof(s))
+		return -EINVAL;
+
+	if (set) {
+		memset(&s, 0, sizeof(s));
+		if (copy_from_user(&s.sig, set, sigsetsize))
+			return -EFAULT;
+	}
+	set_fs(KERNEL_DS);
+	ret = sys_rt_sigprocmask(how,
+				 set ? (sigset_t __user *) &s : NULL,
+				 oset ? (sigset_t __user *) &s : NULL, sizeof(s));
+	set_fs(old_fs);
+	if (ret)
+		return ret;
+	if (oset) {
+		if (copy_to_user(oset, &s.sig, sigsetsize))
+			return -EFAULT;
+	}
+	return 0;
+}
+
+asmlinkage long
+sys32_rt_sigqueueinfo (int pid, int sig, compat_siginfo_t __user *uinfo)
+{
+	mm_segment_t old_fs = get_fs();
+	siginfo_t info;
+	int ret;
+
+	if (copy_siginfo_from_user32(&info, uinfo))
+		return -EFAULT;
+	set_fs(KERNEL_DS);
+	ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __user *) &info);
+	set_fs(old_fs);
+	return ret;
+}
+
+asmlinkage long
+sys32_sigaction (int sig, struct old_sigaction32 __user *act, struct old_sigaction32 __user *oact)
+{
+	struct k_sigaction new_ka, old_ka;
+	unsigned int handler, restorer;
+	int ret;
+
+	if (act) {
+		compat_old_sigset_t mask;
+
+		ret = get_user(handler, &act->sa_handler);
+		ret |= get_user(new_ka.sa.sa_flags, &act->sa_flags);
+		ret |= get_user(restorer, &act->sa_restorer);
+		ret |= get_user(mask, &act->sa_mask);
+		if (ret)
+			return ret;
+
+		sigact_set_handler(&new_ka, handler, restorer);
+		siginitset(&new_ka.sa.sa_mask, mask);
+	}
+
+	ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
+
+	if (!ret && oact) {
+		ret = put_user(IA32_SA_HANDLER(&old_ka), &oact->sa_handler);
+		ret |= put_user(old_ka.sa.sa_flags, &oact->sa_flags);
+		ret |= put_user(IA32_SA_RESTORER(&old_ka), &oact->sa_restorer);
+		ret |= put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask);
+	}
+
+	return ret;
+}
+
+static int
+setup_sigcontext_ia32 (struct sigcontext_ia32 __user *sc, struct _fpstate_ia32 __user *fpstate,
+		       struct pt_regs *regs, unsigned long mask)
+{
+	int  err = 0;
+	unsigned long flag;
+
+	if (!access_ok(VERIFY_WRITE, sc, sizeof(*sc)))
+		return -EFAULT;
+
+	err |= __put_user((regs->r16 >> 32) & 0xffff, (unsigned int __user *)&sc->fs);
+	err |= __put_user((regs->r16 >> 48) & 0xffff, (unsigned int __user *)&sc->gs);
+	err |= __put_user((regs->r16 >> 16) & 0xffff, (unsigned int __user *)&sc->es);
+	err |= __put_user(regs->r16 & 0xffff, (unsigned int __user *)&sc->ds);
+	err |= __put_user(regs->r15, &sc->edi);
+	err |= __put_user(regs->r14, &sc->esi);
+	err |= __put_user(regs->r13, &sc->ebp);
+	err |= __put_user(regs->r12, &sc->esp);
+	err |= __put_user(regs->r11, &sc->ebx);
+	err |= __put_user(regs->r10, &sc->edx);
+	err |= __put_user(regs->r9, &sc->ecx);
+	err |= __put_user(regs->r8, &sc->eax);
+#if 0
+	err |= __put_user(current->tss.trap_no, &sc->trapno);
+	err |= __put_user(current->tss.error_code, &sc->err);
+#endif
+	err |= __put_user(regs->cr_iip, &sc->eip);
+	err |= __put_user(regs->r17 & 0xffff, (unsigned int __user *)&sc->cs);
+	/*
+	 *  `eflags' is in an ar register for this context
+	 */
+	flag = ia64_getreg(_IA64_REG_AR_EFLAG);
+	err |= __put_user((unsigned int)flag, &sc->eflags);
+	err |= __put_user(regs->r12, &sc->esp_at_signal);
+	err |= __put_user((regs->r17 >> 16) & 0xffff, (unsigned int __user *)&sc->ss);
+
+	if ( save_ia32_fpstate_live(fpstate) < 0 )
+		err = -EFAULT;
+	else
+		err |= __put_user((u32)(u64)fpstate, &sc->fpstate);
+
+#if 0
+	tmp = save_i387(fpstate);
+	if (tmp < 0)
+		err = 1;
+	else
+		err |= __put_user(tmp ? fpstate : NULL, &sc->fpstate);
+
+	/* non-iBCS2 extensions.. */
+#endif
+	err |= __put_user(mask, &sc->oldmask);
+#if 0
+	err |= __put_user(current->tss.cr2, &sc->cr2);
+#endif
+	return err;
+}
+
+static int
+restore_sigcontext_ia32 (struct pt_regs *regs, struct sigcontext_ia32 __user *sc, int *peax)
+{
+	unsigned int err = 0;
+
+	/* Always make any pending restarted system calls return -EINTR */
+	current_thread_info()->restart_block.fn = do_no_restart_syscall;
+
+	if (!access_ok(VERIFY_READ, sc, sizeof(*sc)))
+		return(-EFAULT);
+
+#define COPY(ia64x, ia32x)	err |= __get_user(regs->ia64x, &sc->ia32x)
+
+#define copyseg_gs(tmp)		(regs->r16 |= (unsigned long) (tmp) << 48)
+#define copyseg_fs(tmp)		(regs->r16 |= (unsigned long) (tmp) << 32)
+#define copyseg_cs(tmp)		(regs->r17 |= tmp)
+#define copyseg_ss(tmp)		(regs->r17 |= (unsigned long) (tmp) << 16)
+#define copyseg_es(tmp)		(regs->r16 |= (unsigned long) (tmp) << 16)
+#define copyseg_ds(tmp)		(regs->r16 |= tmp)
+
+#define COPY_SEG(seg)					\
+	{						\
+		unsigned short tmp;			\
+		err |= __get_user(tmp, &sc->seg);	\
+		copyseg_##seg(tmp);			\
+	}
+#define COPY_SEG_STRICT(seg)				\
+	{						\
+		unsigned short tmp;			\
+		err |= __get_user(tmp, &sc->seg);	\
+		copyseg_##seg(tmp|3);			\
+	}
+
+	/* To make COPY_SEGs easier, we zero r16, r17 */
+	regs->r16 = 0;
+	regs->r17 = 0;
+
+	COPY_SEG(gs);
+	COPY_SEG(fs);
+	COPY_SEG(es);
+	COPY_SEG(ds);
+	COPY(r15, edi);
+	COPY(r14, esi);
+	COPY(r13, ebp);
+	COPY(r12, esp);
+	COPY(r11, ebx);
+	COPY(r10, edx);
+	COPY(r9, ecx);
+	COPY(cr_iip, eip);
+	COPY_SEG_STRICT(cs);
+	COPY_SEG_STRICT(ss);
+	ia32_load_segment_descriptors(current);
+	{
+		unsigned int tmpflags;
+		unsigned long flag;
+
+		/*
+		 *  IA32 `eflags' is not part of `pt_regs', it's in an ar register which
+		 *  is part of the thread context.  Fortunately, we are executing in the
+		 *  IA32 process's context.
+		 */
+		err |= __get_user(tmpflags, &sc->eflags);
+		flag = ia64_getreg(_IA64_REG_AR_EFLAG);
+		flag &= ~0x40DD5;
+		flag |= (tmpflags & 0x40DD5);
+		ia64_setreg(_IA64_REG_AR_EFLAG, flag);
+
+		regs->r1 = -1;	/* disable syscall checks, r1 is orig_eax */
+	}
+
+	{
+		struct _fpstate_ia32 __user *buf = NULL;
+		u32    fpstate_ptr;
+		err |= get_user(fpstate_ptr, &(sc->fpstate));
+		buf = compat_ptr(fpstate_ptr);
+		if (buf) {
+			err |= restore_ia32_fpstate_live(buf);
+		}
+	}
+
+#if 0
+	{
+		struct _fpstate * buf;
+		err |= __get_user(buf, &sc->fpstate);
+		if (buf) {
+			if (!access_ok(VERIFY_READ, buf, sizeof(*buf)))
+				goto badframe;
+			err |= restore_i387(buf);
+		}
+	}
+#endif
+
+	err |= __get_user(*peax, &sc->eax);
+	return err;
+
+#if 0
+  badframe:
+	return 1;
+#endif
+}
+
+/*
+ * Determine which stack to use..
+ */
+static inline void __user *
+get_sigframe (struct k_sigaction *ka, struct pt_regs * regs, size_t frame_size)
+{
+	unsigned long esp;
+
+	/* Default to using normal stack (truncate off sign-extension of bit 31: */
+	esp = (unsigned int) regs->r12;
+
+	/* This is the X/Open sanctioned signal stack switching.  */
+	if (ka->sa.sa_flags & SA_ONSTACK) {
+		if (!on_sig_stack(esp))
+			esp = current->sas_ss_sp + current->sas_ss_size;
+	}
+	/* Legacy stack switching not supported */
+
+	return (void __user *)((esp - frame_size) & -8ul);
+}
+
+static int
+setup_frame_ia32 (int sig, struct k_sigaction *ka, sigset_t *set, struct pt_regs * regs)
+{
+	struct exec_domain *ed = current_thread_info()->exec_domain;
+	struct sigframe_ia32 __user *frame;
+	int err = 0;
+
+	frame = get_sigframe(ka, regs, sizeof(*frame));
+
+	if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
+		goto give_sigsegv;
+
+	err |= __put_user((ed && ed->signal_invmap && sig < 32
+			   ? (int)(ed->signal_invmap[sig]) : sig), &frame->sig);
+
+	err |= setup_sigcontext_ia32(&frame->sc, &frame->fpstate, regs, set->sig[0]);
+
+	if (_COMPAT_NSIG_WORDS > 1)
+		err |= __copy_to_user(frame->extramask, (char *) &set->sig + 4,
+				      sizeof(frame->extramask));
+
+	/* Set up to return from userspace.  If provided, use a stub
+	   already in userspace.  */
+	if (ka->sa.sa_flags & SA_RESTORER) {
+		unsigned int restorer = IA32_SA_RESTORER(ka);
+		err |= __put_user(restorer, &frame->pretcode);
+	} else {
+		/* Pointing to restorer in ia32 gate page */
+		err |= __put_user(IA32_GATE_OFFSET, &frame->pretcode);
+	}
+
+	/* This is popl %eax ; movl $,%eax ; int $0x80
+	 * and there for historical reasons only.
+	 * See arch/i386/kernel/signal.c
+	 */
+
+	err |= __put_user(0xb858, (short __user *)(frame->retcode+0));
+	err |= __put_user(__IA32_NR_sigreturn, (int __user *)(frame->retcode+2));
+	err |= __put_user(0x80cd, (short __user *)(frame->retcode+6));
+
+	if (err)
+		goto give_sigsegv;
+
+	/* Set up registers for signal handler */
+	regs->r12 = (unsigned long) frame;
+	regs->cr_iip = IA32_SA_HANDLER(ka);
+
+	set_fs(USER_DS);
+
+#if 0
+	regs->eflags &= ~TF_MASK;
+#endif
+
+#if 0
+	printk("SIG deliver (%s:%d): sig=%d sp=%p pc=%lx ra=%x\n",
+               current->comm, current->pid, sig, (void *) frame, regs->cr_iip, frame->pretcode);
+#endif
+
+	return 1;
+
+  give_sigsegv:
+	force_sigsegv(sig, current);
+	return 0;
+}
+
+static int
+setup_rt_frame_ia32 (int sig, struct k_sigaction *ka, siginfo_t *info,
+		     sigset_t *set, struct pt_regs * regs)
+{
+	struct exec_domain *ed = current_thread_info()->exec_domain;
+	compat_uptr_t pinfo, puc;
+	struct rt_sigframe_ia32 __user *frame;
+	int err = 0;
+
+	frame = get_sigframe(ka, regs, sizeof(*frame));
+
+	if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
+		goto give_sigsegv;
+
+	err |= __put_user((ed && ed->signal_invmap
+			   && sig < 32 ? ed->signal_invmap[sig] : sig), &frame->sig);
+
+	pinfo = (long __user) &frame->info;
+	puc = (long __user) &frame->uc;
+	err |= __put_user(pinfo, &frame->pinfo);
+	err |= __put_user(puc, &frame->puc);
+	err |= copy_siginfo_to_user32(&frame->info, info);
+
+	/* Create the ucontext.  */
+	err |= __put_user(0, &frame->uc.uc_flags);
+	err |= __put_user(0, &frame->uc.uc_link);
+	err |= __put_user(current->sas_ss_sp, &frame->uc.uc_stack.ss_sp);
+	err |= __put_user(sas_ss_flags(regs->r12), &frame->uc.uc_stack.ss_flags);
+	err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
+	err |= setup_sigcontext_ia32(&frame->uc.uc_mcontext, &frame->fpstate, regs, set->sig[0]);
+	err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
+	if (err)
+		goto give_sigsegv;
+
+	/* Set up to return from userspace.  If provided, use a stub
+	   already in userspace.  */
+	if (ka->sa.sa_flags & SA_RESTORER) {
+		unsigned int restorer = IA32_SA_RESTORER(ka);
+		err |= __put_user(restorer, &frame->pretcode);
+	} else {
+		/* Pointing to rt_restorer in ia32 gate page */
+		err |= __put_user(IA32_GATE_OFFSET + 8, &frame->pretcode);
+	}
+
+	/* This is movl $,%eax ; int $0x80
+	 * and there for historical reasons only.
+	 * See arch/i386/kernel/signal.c
+	 */
+
+	err |= __put_user(0xb8, (char __user *)(frame->retcode+0));
+	err |= __put_user(__IA32_NR_rt_sigreturn, (int __user *)(frame->retcode+1));
+	err |= __put_user(0x80cd, (short __user *)(frame->retcode+5));
+
+	if (err)
+		goto give_sigsegv;
+
+	/* Set up registers for signal handler */
+	regs->r12 = (unsigned long) frame;
+	regs->cr_iip = IA32_SA_HANDLER(ka);
+
+	set_fs(USER_DS);
+
+#if 0
+	regs->eflags &= ~TF_MASK;
+#endif
+
+#if 0
+	printk("SIG deliver (%s:%d): sp=%p pc=%lx ra=%x\n",
+               current->comm, current->pid, (void *) frame, regs->cr_iip, frame->pretcode);
+#endif
+
+	return 1;
+
+give_sigsegv:
+	force_sigsegv(sig, current);
+	return 0;
+}
+
+int
+ia32_setup_frame1 (int sig, struct k_sigaction *ka, siginfo_t *info,
+		   sigset_t *set, struct pt_regs *regs)
+{
+       /* Set up the stack frame */
+       if (ka->sa.sa_flags & SA_SIGINFO)
+               return setup_rt_frame_ia32(sig, ka, info, set, regs);
+       else
+               return setup_frame_ia32(sig, ka, set, regs);
+}
+
+asmlinkage long
+sys32_sigreturn (int arg0, int arg1, int arg2, int arg3, int arg4, int arg5,
+		 int arg6, int arg7, struct pt_regs regs)
+{
+	unsigned long esp = (unsigned int) regs.r12;
+	struct sigframe_ia32 __user *frame = (struct sigframe_ia32 __user *)(esp - 8);
+	sigset_t set;
+	int eax;
+
+	if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
+		goto badframe;
+
+	if (__get_user(set.sig[0], &frame->sc.oldmask)
+	    || (_COMPAT_NSIG_WORDS > 1 && __copy_from_user((char *) &set.sig + 4, &frame->extramask,
+							 sizeof(frame->extramask))))
+		goto badframe;
+
+	sigdelsetmask(&set, ~_BLOCKABLE);
+	spin_lock_irq(&current->sighand->siglock);
+	current->blocked = set;
+	recalc_sigpending();
+	spin_unlock_irq(&current->sighand->siglock);
+
+	if (restore_sigcontext_ia32(&regs, &frame->sc, &eax))
+		goto badframe;
+	return eax;
+
+  badframe:
+	force_sig(SIGSEGV, current);
+	return 0;
+}
+
+asmlinkage long
+sys32_rt_sigreturn (int arg0, int arg1, int arg2, int arg3, int arg4,
+		    int arg5, int arg6, int arg7, struct pt_regs regs)
+{
+	unsigned long esp = (unsigned int) regs.r12;
+	struct rt_sigframe_ia32 __user *frame = (struct rt_sigframe_ia32 __user *)(esp - 4);
+	sigset_t set;
+	int eax;
+
+	if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
+		goto badframe;
+	if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
+		goto badframe;
+
+	sigdelsetmask(&set, ~_BLOCKABLE);
+	spin_lock_irq(&current->sighand->siglock);
+	current->blocked =  set;
+	recalc_sigpending();
+	spin_unlock_irq(&current->sighand->siglock);
+
+	if (restore_sigcontext_ia32(&regs, &frame->uc.uc_mcontext, &eax))
+		goto badframe;
+
+	/* It is more difficult to avoid calling this function than to
+	   call it and ignore errors.  */
+	do_sigaltstack((stack_t __user *) &frame->uc.uc_stack, NULL, esp);
+
+	return eax;
+
+  badframe:
+	force_sig(SIGSEGV, current);
+	return 0;
+}