x86_64: move ia32

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

18 files changed, 4540 insertions, 0 deletions

diff --git a/arch/x86/ia32/Makefile b/arch/x86/ia32/Makefile
new file mode 100644
index 000000000000..cdae36435e21
--- /dev/null
+++ b/arch/x86/ia32/Makefile
@@ -0,0 +1,35 @@
+#
+# Makefile for the ia32 kernel emulation subsystem.
+#
+
+obj-$(CONFIG_IA32_EMULATION) := ia32entry.o sys_ia32.o ia32_signal.o tls32.o \
+	ia32_binfmt.o fpu32.o ptrace32.o syscall32.o syscall32_syscall.o \
+	mmap32.o
+
+sysv-$(CONFIG_SYSVIPC) := ipc32.o
+obj-$(CONFIG_IA32_EMULATION) += $(sysv-y)
+
+obj-$(CONFIG_IA32_AOUT) += ia32_aout.o
+
+audit-class-$(CONFIG_AUDIT) := audit.o
+obj-$(CONFIG_IA32_EMULATION) += $(audit-class-y)
+
+$(obj)/syscall32_syscall.o: \
+	$(foreach F,sysenter syscall,$(obj)/vsyscall-$F.so)
+
+# Teach kbuild about targets
+targets := $(foreach F,sysenter syscall,vsyscall-$F.o vsyscall-$F.so)
+
+# The DSO images are built using a special linker script
+quiet_cmd_syscall = SYSCALL $@
+      cmd_syscall = $(CC) -m32 -nostdlib -shared -s \
+			  $(call ld-option, -Wl$(comma)--hash-style=sysv) \
+			   -Wl,-soname=linux-gate.so.1 -o $@ \
+			   -Wl,-T,$(filter-out FORCE,$^)
+
+$(obj)/vsyscall-sysenter.so $(obj)/vsyscall-syscall.so: \
+$(obj)/vsyscall-%.so: $(src)/vsyscall.lds $(obj)/vsyscall-%.o FORCE
+	$(call if_changed,syscall)
+
+AFLAGS_vsyscall-sysenter.o = -m32 -Wa,-32
+AFLAGS_vsyscall-syscall.o = -m32 -Wa,-32
diff --git a/arch/x86/ia32/audit.c b/arch/x86/ia32/audit.c
new file mode 100644
index 000000000000..8850fe40ea34
--- /dev/null
+++ b/arch/x86/ia32/audit.c
@@ -0,0 +1,42 @@
+#include <asm-i386/unistd.h>
+
+unsigned ia32_dir_class[] = {
+#include <asm-generic/audit_dir_write.h>
+~0U
+};
+
+unsigned ia32_chattr_class[] = {
+#include <asm-generic/audit_change_attr.h>
+~0U
+};
+
+unsigned ia32_write_class[] = {
+#include <asm-generic/audit_write.h>
+~0U
+};
+
+unsigned ia32_read_class[] = {
+#include <asm-generic/audit_read.h>
+~0U
+};
+
+unsigned ia32_signal_class[] = {
+#include <asm-generic/audit_signal.h>
+~0U
+};
+
+int ia32_classify_syscall(unsigned syscall)
+{
+	switch(syscall) {
+	case __NR_open:
+		return 2;
+	case __NR_openat:
+		return 3;
+	case __NR_socketcall:
+		return 4;
+	case __NR_execve:
+		return 5;
+	default:
+		return 1;
+	}
+}
diff --git a/arch/x86/ia32/fpu32.c b/arch/x86/ia32/fpu32.c
new file mode 100644
index 000000000000..2c8209a3605a
--- /dev/null
+++ b/arch/x86/ia32/fpu32.c
@@ -0,0 +1,183 @@
+/* 
+ * Copyright 2002 Andi Kleen, SuSE Labs.
+ * FXSAVE<->i387 conversion support. Based on code by Gareth Hughes.
+ * This is used for ptrace, signals and coredumps in 32bit emulation.
+ */ 
+
+#include <linux/sched.h>
+#include <asm/sigcontext32.h>
+#include <asm/processor.h>
+#include <asm/uaccess.h>
+#include <asm/i387.h>
+
+static inline unsigned short twd_i387_to_fxsr(unsigned short twd)
+{
+	unsigned int tmp; /* to avoid 16 bit prefixes in the code */
+ 
+	/* Transform each pair of bits into 01 (valid) or 00 (empty) */
+        tmp = ~twd;
+        tmp = (tmp | (tmp>>1)) & 0x5555; /* 0V0V0V0V0V0V0V0V */
+        /* and move the valid bits to the lower byte. */
+        tmp = (tmp | (tmp >> 1)) & 0x3333; /* 00VV00VV00VV00VV */
+        tmp = (tmp | (tmp >> 2)) & 0x0f0f; /* 0000VVVV0000VVVV */
+        tmp = (tmp | (tmp >> 4)) & 0x00ff; /* 00000000VVVVVVVV */
+        return tmp;
+}
+
+static inline unsigned long twd_fxsr_to_i387(struct i387_fxsave_struct *fxsave)
+{
+	struct _fpxreg *st = NULL;
+	unsigned long tos = (fxsave->swd >> 11) & 7;
+	unsigned long twd = (unsigned long) fxsave->twd;
+	unsigned long tag;
+	unsigned long ret = 0xffff0000;
+	int i;
+
+#define FPREG_ADDR(f, n)	((void *)&(f)->st_space + (n) * 16);
+
+	for (i = 0 ; i < 8 ; i++) {
+		if (twd & 0x1) {
+			st = FPREG_ADDR( fxsave, (i - tos) & 7 );
+
+			switch (st->exponent & 0x7fff) {
+			case 0x7fff:
+				tag = 2;		/* Special */
+				break;
+			case 0x0000:
+				if ( !st->significand[0] &&
+				     !st->significand[1] &&
+				     !st->significand[2] &&
+				     !st->significand[3] ) {
+					tag = 1;	/* Zero */
+				} else {
+					tag = 2;	/* Special */
+				}
+				break;
+			default:
+				if (st->significand[3] & 0x8000) {
+					tag = 0;	/* Valid */
+				} else {
+					tag = 2;	/* Special */
+				}
+				break;
+			}
+		} else {
+			tag = 3;			/* Empty */
+		}
+		ret |= (tag << (2 * i));
+		twd = twd >> 1;
+	}
+	return ret;
+}
+
+
+static inline int convert_fxsr_from_user(struct i387_fxsave_struct *fxsave,
+					 struct _fpstate_ia32 __user *buf)
+{
+	struct _fpxreg *to;
+	struct _fpreg __user *from;
+	int i;
+	u32 v;
+	int err = 0;
+
+#define G(num,val) err |= __get_user(val, num + (u32 __user *)buf)
+	G(0, fxsave->cwd);
+	G(1, fxsave->swd);
+	G(2, fxsave->twd);
+	fxsave->twd = twd_i387_to_fxsr(fxsave->twd);
+	G(3, fxsave->rip);
+	G(4, v);
+	fxsave->fop = v>>16;	/* cs ignored */
+	G(5, fxsave->rdp);
+	/* 6: ds ignored */
+#undef G
+	if (err) 
+		return -1; 
+
+	to = (struct _fpxreg *)&fxsave->st_space[0];
+	from = &buf->_st[0];
+	for (i = 0 ; i < 8 ; i++, to++, from++) {
+		if (__copy_from_user(to, from, sizeof(*from)))
+			return -1;
+	}
+	return 0;
+}
+
+
+static inline int convert_fxsr_to_user(struct _fpstate_ia32 __user *buf,
+				       struct i387_fxsave_struct *fxsave,
+				       struct pt_regs *regs,
+				       struct task_struct *tsk)
+{
+	struct _fpreg __user *to;
+	struct _fpxreg *from;
+	int i;
+	u16 cs,ds; 
+	int err = 0; 
+
+	if (tsk == current) {
+		/* should be actually ds/cs at fpu exception time,
+		   but that information is not available in 64bit mode. */
+		asm("movw %%ds,%0 " : "=r" (ds)); 
+		asm("movw %%cs,%0 " : "=r" (cs)); 		
+	} else { /* ptrace. task has stopped. */
+		ds = tsk->thread.ds;
+		cs = regs->cs;
+	} 
+
+#define P(num,val) err |= __put_user(val, num + (u32 __user *)buf)
+	P(0, (u32)fxsave->cwd | 0xffff0000);
+	P(1, (u32)fxsave->swd | 0xffff0000);
+	P(2, twd_fxsr_to_i387(fxsave));
+	P(3, (u32)fxsave->rip);
+	P(4,  cs | ((u32)fxsave->fop) << 16); 
+	P(5, fxsave->rdp);
+	P(6, 0xffff0000 | ds);
+#undef P
+
+	if (err) 
+		return -1; 
+
+	to = &buf->_st[0];
+	from = (struct _fpxreg *) &fxsave->st_space[0];
+	for ( i = 0 ; i < 8 ; i++, to++, from++ ) {
+		if (__copy_to_user(to, from, sizeof(*to)))
+			return -1;
+	}
+	return 0;
+}
+
+int restore_i387_ia32(struct task_struct *tsk, struct _fpstate_ia32 __user *buf, int fsave) 
+{ 
+	clear_fpu(tsk);
+	if (!fsave) { 
+		if (__copy_from_user(&tsk->thread.i387.fxsave, 
+				     &buf->_fxsr_env[0],
+				     sizeof(struct i387_fxsave_struct)))
+			return -1;
+		tsk->thread.i387.fxsave.mxcsr &= mxcsr_feature_mask;
+		set_stopped_child_used_math(tsk);
+	} 
+	return convert_fxsr_from_user(&tsk->thread.i387.fxsave, buf);
+}  
+
+int save_i387_ia32(struct task_struct *tsk, 
+		   struct _fpstate_ia32 __user *buf, 
+		   struct pt_regs *regs,
+		   int fsave)
+{
+	int err = 0;
+
+	init_fpu(tsk);
+	if (convert_fxsr_to_user(buf, &tsk->thread.i387.fxsave, regs, tsk))
+		return -1;
+	if (fsave)
+		return 0;
+	err |= __put_user(tsk->thread.i387.fxsave.swd, &buf->status);
+	if (fsave) 
+		return err ? -1 : 1; 	
+	err |= __put_user(X86_FXSR_MAGIC, &buf->magic);
+	err |= __copy_to_user(&buf->_fxsr_env[0], &tsk->thread.i387.fxsave,
+			      sizeof(struct i387_fxsave_struct));
+	return err ? -1 : 1;
+}
diff --git a/arch/x86/ia32/ia32_aout.c b/arch/x86/ia32/ia32_aout.c
new file mode 100644
index 000000000000..08781370256d
--- /dev/null
+++ b/arch/x86/ia32/ia32_aout.c
@@ -0,0 +1,528 @@
+/*
+ *  a.out loader for x86-64
+ *
+ *  Copyright (C) 1991, 1992, 1996  Linus Torvalds
+ *  Hacked together by Andi Kleen
+ */
+
+#include <linux/module.h>
+
+#include <linux/time.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/mman.h>
+#include <linux/a.out.h>
+#include <linux/errno.h>
+#include <linux/signal.h>
+#include <linux/string.h>
+#include <linux/fs.h>
+#include <linux/file.h>
+#include <linux/stat.h>
+#include <linux/fcntl.h>
+#include <linux/ptrace.h>
+#include <linux/user.h>
+#include <linux/slab.h>
+#include <linux/binfmts.h>
+#include <linux/personality.h>
+#include <linux/init.h>
+
+#include <asm/system.h>
+#include <asm/uaccess.h>
+#include <asm/pgalloc.h>
+#include <asm/cacheflush.h>
+#include <asm/user32.h>
+#include <asm/ia32.h>
+
+#undef WARN_OLD
+#undef CORE_DUMP /* probably broken */
+
+static int load_aout_binary(struct linux_binprm *, struct pt_regs * regs);
+static int load_aout_library(struct file*);
+
+#ifdef CORE_DUMP
+static int aout_core_dump(long signr, struct pt_regs * regs, struct file *file);
+
+/*
+ * fill in the user structure for a core dump..
+ */
+static void dump_thread32(struct pt_regs * regs, struct user32 * dump)
+{
+	u32 fs,gs;
+
+/* changed the size calculations - should hopefully work better. lbt */
+	dump->magic = CMAGIC;
+	dump->start_code = 0;
+	dump->start_stack = regs->rsp & ~(PAGE_SIZE - 1);
+	dump->u_tsize = ((unsigned long) current->mm->end_code) >> PAGE_SHIFT;
+	dump->u_dsize = ((unsigned long) (current->mm->brk + (PAGE_SIZE-1))) >> PAGE_SHIFT;
+	dump->u_dsize -= dump->u_tsize;
+	dump->u_ssize = 0;
+	dump->u_debugreg[0] = current->thread.debugreg0;  
+	dump->u_debugreg[1] = current->thread.debugreg1;  
+	dump->u_debugreg[2] = current->thread.debugreg2;  
+	dump->u_debugreg[3] = current->thread.debugreg3;  
+	dump->u_debugreg[4] = 0;  
+	dump->u_debugreg[5] = 0;  
+	dump->u_debugreg[6] = current->thread.debugreg6;  
+	dump->u_debugreg[7] = current->thread.debugreg7;  
+
+	if (dump->start_stack < 0xc0000000)
+		dump->u_ssize = ((unsigned long) (0xc0000000 - dump->start_stack)) >> PAGE_SHIFT;
+
+	dump->regs.ebx = regs->rbx;
+	dump->regs.ecx = regs->rcx;
+	dump->regs.edx = regs->rdx;
+	dump->regs.esi = regs->rsi;
+	dump->regs.edi = regs->rdi;
+	dump->regs.ebp = regs->rbp;
+	dump->regs.eax = regs->rax;
+	dump->regs.ds = current->thread.ds;
+	dump->regs.es = current->thread.es;
+	asm("movl %%fs,%0" : "=r" (fs)); dump->regs.fs = fs;
+	asm("movl %%gs,%0" : "=r" (gs)); dump->regs.gs = gs; 
+	dump->regs.orig_eax = regs->orig_rax;
+	dump->regs.eip = regs->rip;
+	dump->regs.cs = regs->cs;
+	dump->regs.eflags = regs->eflags;
+	dump->regs.esp = regs->rsp;
+	dump->regs.ss = regs->ss;
+
+#if 1 /* FIXME */
+	dump->u_fpvalid = 0;
+#else
+	dump->u_fpvalid = dump_fpu (regs, &dump->i387);
+#endif
+}
+
+#endif
+
+static struct linux_binfmt aout_format = {
+	.module		= THIS_MODULE,
+	.load_binary	= load_aout_binary,
+	.load_shlib	= load_aout_library,
+#ifdef CORE_DUMP
+	.core_dump	= aout_core_dump,
+#endif
+	.min_coredump	= PAGE_SIZE
+};
+
+static void set_brk(unsigned long start, unsigned long end)
+{
+	start = PAGE_ALIGN(start);
+	end = PAGE_ALIGN(end);
+	if (end <= start)
+		return;
+	down_write(&current->mm->mmap_sem);
+	do_brk(start, end - start);
+	up_write(&current->mm->mmap_sem);
+}
+
+#ifdef CORE_DUMP
+/*
+ * These are the only things you should do on a core-file: use only these
+ * macros to write out all the necessary info.
+ */
+
+static int dump_write(struct file *file, const void *addr, int nr)
+{
+	return file->f_op->write(file, addr, nr, &file->f_pos) == nr;
+}
+
+#define DUMP_WRITE(addr, nr)	\
+	if (!dump_write(file, (void *)(addr), (nr))) \
+		goto end_coredump;
+
+#define DUMP_SEEK(offset) \
+if (file->f_op->llseek) { \
+	if (file->f_op->llseek(file,(offset),0) != (offset)) \
+ 		goto end_coredump; \
+} else file->f_pos = (offset)
+
+/*
+ * Routine writes a core dump image in the current directory.
+ * Currently only a stub-function.
+ *
+ * Note that setuid/setgid files won't make a core-dump if the uid/gid
+ * changed due to the set[u|g]id. It's enforced by the "current->mm->dumpable"
+ * field, which also makes sure the core-dumps won't be recursive if the
+ * dumping of the process results in another error..
+ */
+
+static int aout_core_dump(long signr, struct pt_regs * regs, struct file *file)
+{
+	mm_segment_t fs;
+	int has_dumped = 0;
+	unsigned long dump_start, dump_size;
+	struct user32 dump;
+#       define START_DATA(u)	(u.u_tsize << PAGE_SHIFT)
+#       define START_STACK(u)   (u.start_stack)
+
+	fs = get_fs();
+	set_fs(KERNEL_DS);
+	has_dumped = 1;
+	current->flags |= PF_DUMPCORE;
+       	strncpy(dump.u_comm, current->comm, sizeof(current->comm));
+	dump.u_ar0 = (u32)(((unsigned long)(&dump.regs)) - ((unsigned long)(&dump)));
+	dump.signal = signr;
+	dump_thread32(regs, &dump);
+
+/* If the size of the dump file exceeds the rlimit, then see what would happen
+   if we wrote the stack, but not the data area.  */
+	if ((dump.u_dsize+dump.u_ssize+1) * PAGE_SIZE >
+	    current->signal->rlim[RLIMIT_CORE].rlim_cur)
+		dump.u_dsize = 0;
+
+/* Make sure we have enough room to write the stack and data areas. */
+	if ((dump.u_ssize+1) * PAGE_SIZE >
+	    current->signal->rlim[RLIMIT_CORE].rlim_cur)
+		dump.u_ssize = 0;
+
+/* make sure we actually have a data and stack area to dump */
+	set_fs(USER_DS);
+	if (!access_ok(VERIFY_READ, (void *) (unsigned long)START_DATA(dump), dump.u_dsize << PAGE_SHIFT))
+		dump.u_dsize = 0;
+	if (!access_ok(VERIFY_READ, (void *) (unsigned long)START_STACK(dump), dump.u_ssize << PAGE_SHIFT))
+		dump.u_ssize = 0;
+
+	set_fs(KERNEL_DS);
+/* struct user */
+	DUMP_WRITE(&dump,sizeof(dump));
+/* Now dump all of the user data.  Include malloced stuff as well */
+	DUMP_SEEK(PAGE_SIZE);
+/* now we start writing out the user space info */
+	set_fs(USER_DS);
+/* Dump the data area */
+	if (dump.u_dsize != 0) {
+		dump_start = START_DATA(dump);
+		dump_size = dump.u_dsize << PAGE_SHIFT;
+		DUMP_WRITE(dump_start,dump_size);
+	}
+/* Now prepare to dump the stack area */
+	if (dump.u_ssize != 0) {
+		dump_start = START_STACK(dump);
+		dump_size = dump.u_ssize << PAGE_SHIFT;
+		DUMP_WRITE(dump_start,dump_size);
+	}
+/* Finally dump the task struct.  Not be used by gdb, but could be useful */
+	set_fs(KERNEL_DS);
+	DUMP_WRITE(current,sizeof(*current));
+end_coredump:
+	set_fs(fs);
+	return has_dumped;
+}
+#endif
+
+/*
+ * create_aout_tables() parses the env- and arg-strings in new user
+ * memory and creates the pointer tables from them, and puts their
+ * addresses on the "stack", returning the new stack pointer value.
+ */
+static u32 __user *create_aout_tables(char __user *p, struct linux_binprm *bprm)
+{
+	u32 __user *argv;
+	u32 __user *envp;
+	u32 __user *sp;
+	int argc = bprm->argc;
+	int envc = bprm->envc;
+
+	sp = (u32 __user *) ((-(unsigned long)sizeof(u32)) & (unsigned long) p);
+	sp -= envc+1;
+	envp = sp;
+	sp -= argc+1;
+	argv = sp;
+	put_user((unsigned long) envp,--sp);
+	put_user((unsigned long) argv,--sp);
+	put_user(argc,--sp);
+	current->mm->arg_start = (unsigned long) p;
+	while (argc-->0) {
+		char c;
+		put_user((u32)(unsigned long)p,argv++);
+		do {
+			get_user(c,p++);
+		} while (c);
+	}
+	put_user(0, argv);
+	current->mm->arg_end = current->mm->env_start = (unsigned long) p;
+	while (envc-->0) {
+		char c;
+		put_user((u32)(unsigned long)p,envp++);
+		do {
+			get_user(c,p++);
+		} while (c);
+	}
+	put_user(0, envp);
+	current->mm->env_end = (unsigned long) p;
+	return sp;
+}
+
+/*
+ * These are the functions used to load a.out style executables and shared
+ * libraries.  There is no binary dependent code anywhere else.
+ */
+
+static int load_aout_binary(struct linux_binprm * bprm, struct pt_regs * regs)
+{
+	struct exec ex;
+	unsigned long error;
+	unsigned long fd_offset;
+	unsigned long rlim;
+	int retval;
+
+	ex = *((struct exec *) bprm->buf);		/* exec-header */
+	if ((N_MAGIC(ex) != ZMAGIC && N_MAGIC(ex) != OMAGIC &&
+	     N_MAGIC(ex) != QMAGIC && N_MAGIC(ex) != NMAGIC) ||
+	    N_TRSIZE(ex) || N_DRSIZE(ex) ||
+	    i_size_read(bprm->file->f_path.dentry->d_inode) < ex.a_text+ex.a_data+N_SYMSIZE(ex)+N_TXTOFF(ex)) {
+		return -ENOEXEC;
+	}
+
+	fd_offset = N_TXTOFF(ex);
+
+	/* Check initial limits. This avoids letting people circumvent
+	 * size limits imposed on them by creating programs with large
+	 * arrays in the data or bss.
+	 */
+	rlim = current->signal->rlim[RLIMIT_DATA].rlim_cur;
+	if (rlim >= RLIM_INFINITY)
+		rlim = ~0;
+	if (ex.a_data + ex.a_bss > rlim)
+		return -ENOMEM;
+
+	/* Flush all traces of the currently running executable */
+	retval = flush_old_exec(bprm);
+	if (retval)
+		return retval;
+
+	regs->cs = __USER32_CS; 
+	regs->r8 = regs->r9 = regs->r10 = regs->r11 = regs->r12 =
+		regs->r13 = regs->r14 = regs->r15 = 0;
+
+	/* OK, This is the point of no return */
+	set_personality(PER_LINUX);
+	set_thread_flag(TIF_IA32); 
+	clear_thread_flag(TIF_ABI_PENDING);
+
+	current->mm->end_code = ex.a_text +
+		(current->mm->start_code = N_TXTADDR(ex));
+	current->mm->end_data = ex.a_data +
+		(current->mm->start_data = N_DATADDR(ex));
+	current->mm->brk = ex.a_bss +
+		(current->mm->start_brk = N_BSSADDR(ex));
+	current->mm->free_area_cache = TASK_UNMAPPED_BASE;
+	current->mm->cached_hole_size = 0;
+
+	current->mm->mmap = NULL;
+	compute_creds(bprm);
+ 	current->flags &= ~PF_FORKNOEXEC;
+
+	if (N_MAGIC(ex) == OMAGIC) {
+		unsigned long text_addr, map_size;
+		loff_t pos;
+
+		text_addr = N_TXTADDR(ex);
+
+		pos = 32;
+		map_size = ex.a_text+ex.a_data;
+
+		down_write(&current->mm->mmap_sem);
+		error = do_brk(text_addr & PAGE_MASK, map_size);
+		up_write(&current->mm->mmap_sem);
+
+		if (error != (text_addr & PAGE_MASK)) {
+			send_sig(SIGKILL, current, 0);
+			return error;
+		}
+
+		error = bprm->file->f_op->read(bprm->file,
+			 (char __user *)text_addr,
+			  ex.a_text+ex.a_data, &pos);
+		if ((signed long)error < 0) {
+			send_sig(SIGKILL, current, 0);
+			return error;
+		}
+			 
+		flush_icache_range(text_addr, text_addr+ex.a_text+ex.a_data);
+	} else {
+#ifdef WARN_OLD
+		static unsigned long error_time, error_time2;
+		if ((ex.a_text & 0xfff || ex.a_data & 0xfff) &&
+		    (N_MAGIC(ex) != NMAGIC) && (jiffies-error_time2) > 5*HZ)
+		{
+			printk(KERN_NOTICE "executable not page aligned\n");
+			error_time2 = jiffies;
+		}
+
+		if ((fd_offset & ~PAGE_MASK) != 0 &&
+		    (jiffies-error_time) > 5*HZ)
+		{
+			printk(KERN_WARNING 
+			       "fd_offset is not page aligned. Please convert program: %s\n",
+			       bprm->file->f_path.dentry->d_name.name);
+			error_time = jiffies;
+		}
+#endif
+
+		if (!bprm->file->f_op->mmap||((fd_offset & ~PAGE_MASK) != 0)) {
+			loff_t pos = fd_offset;
+			down_write(&current->mm->mmap_sem);
+			do_brk(N_TXTADDR(ex), ex.a_text+ex.a_data);
+			up_write(&current->mm->mmap_sem);
+			bprm->file->f_op->read(bprm->file,
+					(char __user *)N_TXTADDR(ex),
+					ex.a_text+ex.a_data, &pos);
+			flush_icache_range((unsigned long) N_TXTADDR(ex),
+					   (unsigned long) N_TXTADDR(ex) +
+					   ex.a_text+ex.a_data);
+			goto beyond_if;
+		}
+
+		down_write(&current->mm->mmap_sem);
+		error = do_mmap(bprm->file, N_TXTADDR(ex), ex.a_text,
+			PROT_READ | PROT_EXEC,
+			MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE | MAP_EXECUTABLE | MAP_32BIT,
+			fd_offset);
+		up_write(&current->mm->mmap_sem);
+
+		if (error != N_TXTADDR(ex)) {
+			send_sig(SIGKILL, current, 0);
+			return error;
+		}
+
+		down_write(&current->mm->mmap_sem);
+ 		error = do_mmap(bprm->file, N_DATADDR(ex), ex.a_data,
+				PROT_READ | PROT_WRITE | PROT_EXEC,
+				MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE | MAP_EXECUTABLE | MAP_32BIT,
+				fd_offset + ex.a_text);
+		up_write(&current->mm->mmap_sem);
+		if (error != N_DATADDR(ex)) {
+			send_sig(SIGKILL, current, 0);
+			return error;
+		}
+	}
+beyond_if:
+	set_binfmt(&aout_format);
+
+	set_brk(current->mm->start_brk, current->mm->brk);
+
+	retval = setup_arg_pages(bprm, IA32_STACK_TOP, EXSTACK_DEFAULT);
+	if (retval < 0) { 
+		/* Someone check-me: is this error path enough? */ 
+		send_sig(SIGKILL, current, 0); 
+		return retval;
+	}
+
+	current->mm->start_stack =
+		(unsigned long)create_aout_tables((char __user *)bprm->p, bprm);
+	/* start thread */
+	asm volatile("movl %0,%%fs" :: "r" (0)); \
+	asm volatile("movl %0,%%es; movl %0,%%ds": :"r" (__USER32_DS));
+	load_gs_index(0); 
+	(regs)->rip = ex.a_entry;
+	(regs)->rsp = current->mm->start_stack;
+	(regs)->eflags = 0x200;
+	(regs)->cs = __USER32_CS;
+	(regs)->ss = __USER32_DS;
+	set_fs(USER_DS);
+	if (unlikely(current->ptrace & PT_PTRACED)) {
+		if (current->ptrace & PT_TRACE_EXEC)
+			ptrace_notify ((PTRACE_EVENT_EXEC << 8) | SIGTRAP);
+		else
+			send_sig(SIGTRAP, current, 0);
+	}
+	return 0;
+}
+
+static int load_aout_library(struct file *file)
+{
+	struct inode * inode;
+	unsigned long bss, start_addr, len;
+	unsigned long error;
+	int retval;
+	struct exec ex;
+
+	inode = file->f_path.dentry->d_inode;
+
+	retval = -ENOEXEC;
+	error = kernel_read(file, 0, (char *) &ex, sizeof(ex));
+	if (error != sizeof(ex))
+		goto out;
+
+	/* We come in here for the regular a.out style of shared libraries */
+	if ((N_MAGIC(ex) != ZMAGIC && N_MAGIC(ex) != QMAGIC) || N_TRSIZE(ex) ||
+	    N_DRSIZE(ex) || ((ex.a_entry & 0xfff) && N_MAGIC(ex) == ZMAGIC) ||
+	    i_size_read(inode) < ex.a_text+ex.a_data+N_SYMSIZE(ex)+N_TXTOFF(ex)) {
+		goto out;
+	}
+
+	if (N_FLAGS(ex))
+		goto out;
+
+	/* For  QMAGIC, the starting address is 0x20 into the page.  We mask
+	   this off to get the starting address for the page */
+
+	start_addr =  ex.a_entry & 0xfffff000;
+
+	if ((N_TXTOFF(ex) & ~PAGE_MASK) != 0) {
+		loff_t pos = N_TXTOFF(ex);
+
+#ifdef WARN_OLD
+		static unsigned long error_time;
+		if ((jiffies-error_time) > 5*HZ)
+		{
+			printk(KERN_WARNING 
+			       "N_TXTOFF is not page aligned. Please convert library: %s\n",
+			       file->f_path.dentry->d_name.name);
+			error_time = jiffies;
+		}
+#endif
+		down_write(&current->mm->mmap_sem);
+		do_brk(start_addr, ex.a_text + ex.a_data + ex.a_bss);
+		up_write(&current->mm->mmap_sem);
+		
+		file->f_op->read(file, (char __user *)start_addr,
+			ex.a_text + ex.a_data, &pos);
+		flush_icache_range((unsigned long) start_addr,
+				   (unsigned long) start_addr + ex.a_text + ex.a_data);
+
+		retval = 0;
+		goto out;
+	}
+	/* Now use mmap to map the library into memory. */
+	down_write(&current->mm->mmap_sem);
+	error = do_mmap(file, start_addr, ex.a_text + ex.a_data,
+			PROT_READ | PROT_WRITE | PROT_EXEC,
+			MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE | MAP_32BIT,
+			N_TXTOFF(ex));
+	up_write(&current->mm->mmap_sem);
+	retval = error;
+	if (error != start_addr)
+		goto out;
+
+	len = PAGE_ALIGN(ex.a_text + ex.a_data);
+	bss = ex.a_text + ex.a_data + ex.a_bss;
+	if (bss > len) {
+		down_write(&current->mm->mmap_sem);
+		error = do_brk(start_addr + len, bss - len);
+		up_write(&current->mm->mmap_sem);
+		retval = error;
+		if (error != start_addr + len)
+			goto out;
+	}
+	retval = 0;
+out:
+	return retval;
+}
+
+static int __init init_aout_binfmt(void)
+{
+	return register_binfmt(&aout_format);
+}
+
+static void __exit exit_aout_binfmt(void)
+{
+	unregister_binfmt(&aout_format);
+}
+
+module_init(init_aout_binfmt);
+module_exit(exit_aout_binfmt);
+MODULE_LICENSE("GPL");
diff --git a/arch/x86/ia32/ia32_binfmt.c b/arch/x86/ia32/ia32_binfmt.c
new file mode 100644
index 000000000000..dffd2ac72747
--- /dev/null
+++ b/arch/x86/ia32/ia32_binfmt.c
@@ -0,0 +1,320 @@
+/* 
+ * Written 2000,2002 by Andi Kleen. 
+ * 
+ * Loosely based on the sparc64 and IA64 32bit emulation loaders.
+ * This tricks binfmt_elf.c into loading 32bit binaries using lots 
+ * of ugly preprocessor tricks. Talk about very very poor man's inheritance.
+ */ 
+#define __ASM_X86_64_ELF_H 1
+
+#undef ELF_CLASS
+#define ELF_CLASS ELFCLASS32
+
+#include <linux/types.h>
+#include <linux/stddef.h>
+#include <linux/rwsem.h>
+#include <linux/sched.h>
+#include <linux/compat.h>
+#include <linux/string.h>
+#include <linux/binfmts.h>
+#include <linux/mm.h>
+#include <linux/security.h>
+
+#include <asm/segment.h> 
+#include <asm/ptrace.h>
+#include <asm/processor.h>
+#include <asm/user32.h>
+#include <asm/sigcontext32.h>
+#include <asm/fpu32.h>
+#include <asm/i387.h>
+#include <asm/uaccess.h>
+#include <asm/ia32.h>
+#include <asm/vsyscall32.h>
+
+#define ELF_NAME "elf/i386"
+
+#define AT_SYSINFO 32
+#define AT_SYSINFO_EHDR		33
+
+int sysctl_vsyscall32 = 1;
+
+#undef ARCH_DLINFO
+#define ARCH_DLINFO do {  \
+	if (sysctl_vsyscall32) { \
+		current->mm->context.vdso = (void *)VSYSCALL32_BASE;	\
+		NEW_AUX_ENT(AT_SYSINFO, (u32)(u64)VSYSCALL32_VSYSCALL); \
+		NEW_AUX_ENT(AT_SYSINFO_EHDR, VSYSCALL32_BASE);    \
+	}	\
+} while(0)
+
+struct file;
+struct elf_phdr; 
+
+#define IA32_EMULATOR 1
+
+#define ELF_ET_DYN_BASE		(TASK_UNMAPPED_BASE + 0x1000000)
+
+#undef ELF_ARCH
+#define ELF_ARCH EM_386
+
+#define ELF_DATA	ELFDATA2LSB
+
+#define USE_ELF_CORE_DUMP 1
+
+/* Override elfcore.h */ 
+#define _LINUX_ELFCORE_H 1
+typedef unsigned int elf_greg_t;
+
+#define ELF_NGREG (sizeof (struct user_regs_struct32) / sizeof(elf_greg_t))
+typedef elf_greg_t elf_gregset_t[ELF_NGREG];
+
+struct elf_siginfo
+{
+	int	si_signo;			/* signal number */
+	int	si_code;			/* extra code */
+	int	si_errno;			/* errno */
+};
+
+#define jiffies_to_timeval(a,b) do { (b)->tv_usec = 0; (b)->tv_sec = (a)/HZ; }while(0)
+
+struct elf_prstatus
+{
+	struct elf_siginfo pr_info;	/* Info associated with signal */
+	short	pr_cursig;		/* Current signal */
+	unsigned int pr_sigpend;	/* Set of pending signals */
+	unsigned int pr_sighold;	/* Set of held signals */
+	pid_t	pr_pid;
+	pid_t	pr_ppid;
+	pid_t	pr_pgrp;
+	pid_t	pr_sid;
+	struct compat_timeval pr_utime;	/* User time */
+	struct compat_timeval pr_stime;	/* System time */
+	struct compat_timeval pr_cutime;	/* Cumulative user time */
+	struct compat_timeval pr_cstime;	/* Cumulative system time */
+	elf_gregset_t pr_reg;	/* GP registers */
+	int pr_fpvalid;		/* True if math co-processor being used.  */
+};
+
+#define ELF_PRARGSZ	(80)	/* Number of chars for args */
+
+struct elf_prpsinfo
+{
+	char	pr_state;	/* numeric process state */
+	char	pr_sname;	/* char for pr_state */
+	char	pr_zomb;	/* zombie */
+	char	pr_nice;	/* nice val */
+	unsigned int pr_flag;	/* flags */
+	__u16	pr_uid;
+	__u16	pr_gid;
+	pid_t	pr_pid, pr_ppid, pr_pgrp, pr_sid;
+	/* Lots missing */
+	char	pr_fname[16];	/* filename of executable */
+	char	pr_psargs[ELF_PRARGSZ];	/* initial part of arg list */
+};
+
+#define __STR(x) #x
+#define STR(x) __STR(x)
+
+#define _GET_SEG(x) \
+	({ __u32 seg; asm("movl %%" STR(x) ",%0" : "=r"(seg)); seg; })
+
+/* Assumes current==process to be dumped */
+#define ELF_CORE_COPY_REGS(pr_reg, regs)       		\
+	pr_reg[0] = regs->rbx;				\
+	pr_reg[1] = regs->rcx;				\
+	pr_reg[2] = regs->rdx;				\
+	pr_reg[3] = regs->rsi;				\
+	pr_reg[4] = regs->rdi;				\
+	pr_reg[5] = regs->rbp;				\
+	pr_reg[6] = regs->rax;				\
+	pr_reg[7] = _GET_SEG(ds);   			\
+	pr_reg[8] = _GET_SEG(es);			\
+	pr_reg[9] = _GET_SEG(fs);			\
+	pr_reg[10] = _GET_SEG(gs);			\
+	pr_reg[11] = regs->orig_rax;			\
+	pr_reg[12] = regs->rip;				\
+	pr_reg[13] = regs->cs;				\
+	pr_reg[14] = regs->eflags;			\
+	pr_reg[15] = regs->rsp;				\
+	pr_reg[16] = regs->ss;
+
+#define user user32
+
+#undef elf_read_implies_exec
+#define elf_read_implies_exec(ex, executable_stack)     (executable_stack != EXSTACK_DISABLE_X)
+//#include <asm/ia32.h>
+#include <linux/elf.h>
+
+typedef struct user_i387_ia32_struct elf_fpregset_t;
+typedef struct user32_fxsr_struct elf_fpxregset_t;
+
+
+static inline void elf_core_copy_regs(elf_gregset_t *elfregs, struct pt_regs *regs)
+{
+	ELF_CORE_COPY_REGS((*elfregs), regs)
+}
+
+static inline int elf_core_copy_task_regs(struct task_struct *t, elf_gregset_t* elfregs)
+{	
+	struct pt_regs *pp = task_pt_regs(t);
+	ELF_CORE_COPY_REGS((*elfregs), pp);
+	/* fix wrong segments */ 
+	(*elfregs)[7] = t->thread.ds; 
+	(*elfregs)[9] = t->thread.fsindex; 
+	(*elfregs)[10] = t->thread.gsindex; 
+	(*elfregs)[8] = t->thread.es; 	
+	return 1; 
+}
+
+static inline int 
+elf_core_copy_task_fpregs(struct task_struct *tsk, struct pt_regs *regs, elf_fpregset_t *fpu)
+{
+	struct _fpstate_ia32 *fpstate = (void*)fpu; 
+	mm_segment_t oldfs = get_fs();
+
+	if (!tsk_used_math(tsk))
+		return 0;
+	if (!regs)
+		regs = task_pt_regs(tsk);
+	if (tsk == current)
+		unlazy_fpu(tsk);
+	set_fs(KERNEL_DS); 
+	save_i387_ia32(tsk, fpstate, regs, 1);
+	/* Correct for i386 bug. It puts the fop into the upper 16bits of 
+	   the tag word (like FXSAVE), not into the fcs*/ 
+	fpstate->cssel |= fpstate->tag & 0xffff0000; 
+	set_fs(oldfs); 
+	return 1; 
+}
+
+#define ELF_CORE_COPY_XFPREGS 1
+static inline int 
+elf_core_copy_task_xfpregs(struct task_struct *t, elf_fpxregset_t *xfpu)
+{
+	struct pt_regs *regs = task_pt_regs(t);
+	if (!tsk_used_math(t))
+		return 0;
+	if (t == current)
+		unlazy_fpu(t); 
+	memcpy(xfpu, &t->thread.i387.fxsave, sizeof(elf_fpxregset_t));
+	xfpu->fcs = regs->cs; 
+	xfpu->fos = t->thread.ds; /* right? */ 
+	return 1;
+}
+
+#undef elf_check_arch
+#define elf_check_arch(x) \
+	((x)->e_machine == EM_386)
+
+extern int force_personality32;
+
+#define ELF_EXEC_PAGESIZE PAGE_SIZE
+#define ELF_HWCAP (boot_cpu_data.x86_capability[0])
+#define ELF_PLATFORM  ("i686")
+#define SET_PERSONALITY(ex, ibcs2)			\
+do {							\
+	unsigned long new_flags = 0;				\
+	if ((ex).e_ident[EI_CLASS] == ELFCLASS32)		\
+		new_flags = _TIF_IA32;				\
+	if ((current_thread_info()->flags & _TIF_IA32)		\
+	    != new_flags)					\
+		set_thread_flag(TIF_ABI_PENDING);		\
+	else							\
+		clear_thread_flag(TIF_ABI_PENDING);		\
+	/* XXX This overwrites the user set personality */	\
+	current->personality |= force_personality32;		\
+} while (0)
+
+/* Override some function names */
+#define elf_format			elf32_format
+
+#define init_elf_binfmt			init_elf32_binfmt
+#define exit_elf_binfmt			exit_elf32_binfmt
+
+#define load_elf_binary load_elf32_binary
+
+#define ELF_PLAT_INIT(r, load_addr)	elf32_init(r)
+
+#undef start_thread
+#define start_thread(regs,new_rip,new_rsp) do { \
+	asm volatile("movl %0,%%fs" :: "r" (0)); \
+	asm volatile("movl %0,%%es; movl %0,%%ds": :"r" (__USER32_DS)); \
+	load_gs_index(0); \
+	(regs)->rip = (new_rip); \
+	(regs)->rsp = (new_rsp); \
+	(regs)->eflags = 0x200; \
+	(regs)->cs = __USER32_CS; \
+	(regs)->ss = __USER32_DS; \
+	set_fs(USER_DS); \
+} while(0) 
+
+
+#include <linux/module.h>
+
+MODULE_DESCRIPTION("Binary format loader for compatibility with IA32 ELF binaries."); 
+MODULE_AUTHOR("Eric Youngdale, Andi Kleen");
+
+#undef MODULE_DESCRIPTION
+#undef MODULE_AUTHOR
+
+static void elf32_init(struct pt_regs *);
+
+#define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1
+#define arch_setup_additional_pages syscall32_setup_pages
+extern int syscall32_setup_pages(struct linux_binprm *, int exstack);
+
+#include "../../../fs/binfmt_elf.c" 
+
+static void elf32_init(struct pt_regs *regs)
+{
+	struct task_struct *me = current; 
+	regs->rdi = 0;
+	regs->rsi = 0;
+	regs->rdx = 0;
+	regs->rcx = 0;
+	regs->rax = 0;
+	regs->rbx = 0; 
+	regs->rbp = 0; 
+	regs->r8 = regs->r9 = regs->r10 = regs->r11 = regs->r12 =
+		regs->r13 = regs->r14 = regs->r15 = 0; 
+    me->thread.fs = 0; 
+	me->thread.gs = 0;
+	me->thread.fsindex = 0; 
+	me->thread.gsindex = 0;
+    me->thread.ds = __USER_DS; 
+	me->thread.es = __USER_DS;
+}
+
+#ifdef CONFIG_SYSCTL
+/* Register vsyscall32 into the ABI table */
+#include <linux/sysctl.h>
+
+static ctl_table abi_table2[] = {
+	{
+		.ctl_name	= 99,
+		.procname	= "vsyscall32",
+		.data		= &sysctl_vsyscall32,
+		.maxlen		= sizeof(int),
+		.mode		= 0644,
+		.proc_handler	= proc_dointvec
+	},
+	{}
+};
+
+static ctl_table abi_root_table2[] = {
+	{
+		.ctl_name = CTL_ABI,
+		.procname = "abi",
+		.mode = 0555,
+		.child = abi_table2
+	},
+	{}
+};
+
+static __init int ia32_binfmt_init(void)
+{ 
+	register_sysctl_table(abi_root_table2);
+	return 0;
+}
+__initcall(ia32_binfmt_init);
+#endif
diff --git a/arch/x86/ia32/ia32_signal.c b/arch/x86/ia32/ia32_signal.c
new file mode 100644
index 000000000000..6ea19c25f90d
--- /dev/null
+++ b/arch/x86/ia32/ia32_signal.c
@@ -0,0 +1,617 @@
+/*
+ *  linux/arch/x86_64/ia32/ia32_signal.c
+ *
+ *  Copyright (C) 1991, 1992  Linus Torvalds
+ *
+ *  1997-11-28  Modified for POSIX.1b signals by Richard Henderson
+ *  2000-06-20  Pentium III FXSR, SSE support by Gareth Hughes
+ *  2000-12-*   x86-64 compatibility mode signal handling by Andi Kleen
+ */
+
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/smp.h>
+#include <linux/kernel.h>
+#include <linux/signal.h>
+#include <linux/errno.h>
+#include <linux/wait.h>
+#include <linux/ptrace.h>
+#include <linux/unistd.h>
+#include <linux/stddef.h>
+#include <linux/personality.h>
+#include <linux/compat.h>
+#include <linux/binfmts.h>
+#include <asm/ucontext.h>
+#include <asm/uaccess.h>
+#include <asm/i387.h>
+#include <asm/ia32.h>
+#include <asm/ptrace.h>
+#include <asm/ia32_unistd.h>
+#include <asm/user32.h>
+#include <asm/sigcontext32.h>
+#include <asm/fpu32.h>
+#include <asm/proto.h>
+#include <asm/vsyscall32.h>
+
+#define DEBUG_SIG 0
+
+#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
+
+asmlinkage int do_signal(struct pt_regs *regs, sigset_t *oldset);
+void signal_fault(struct pt_regs *regs, void __user *frame, char *where);
+
+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 make sure that
+	   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.  */
+	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 |= __put_user(from->si_pid, &to->si_pid);
+ 		err |= __put_user(from->si_uid, &to->si_uid);
+ 		err |= __put_user(ptr_to_compat(from->si_ptr), &to->si_ptr);
+	} else {
+ 		/* First 32bits of unions are always present:
+ 		 * si_pid === si_band === si_tid === si_addr(LS half) */
+		err |= __put_user(from->_sifields._pad[0], &to->_sifields._pad[0]);
+		switch (from->si_code >> 16) {
+		case __SI_FAULT >> 16:
+			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);
+			/* FALL THROUGH */
+		default:
+		case __SI_KILL >> 16:
+			err |= __put_user(from->si_uid, &to->si_uid);
+			break;
+		case __SI_POLL >> 16:
+			err |= __put_user(from->si_fd, &to->si_fd); 
+			break;
+		case __SI_TIMER >> 16:
+			err |= __put_user(from->si_overrun, &to->si_overrun); 
+			err |= __put_user(ptr_to_compat(from->si_ptr),
+					&to->si_ptr);
+			break;
+		case __SI_RT >> 16: /* This is 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_int, &to->si_int);
+			break;
+		}
+	}
+	return err;
+}
+
+int copy_siginfo_from_user32(siginfo_t *to, compat_siginfo_t __user *from)
+{
+	int err;
+	u32 ptr32;
+	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);
+
+	err |= __get_user(to->si_pid, &from->si_pid);
+	err |= __get_user(to->si_uid, &from->si_uid);
+	err |= __get_user(ptr32, &from->si_ptr);
+	to->si_ptr = compat_ptr(ptr32);
+
+	return err;
+}
+
+asmlinkage long
+sys32_sigsuspend(int history0, int history1, old_sigset_t mask)
+{
+	mask &= _BLOCKABLE;
+	spin_lock_irq(&current->sighand->siglock);
+	current->saved_sigmask = current->blocked;
+	siginitset(&current->blocked, mask);
+	recalc_sigpending();
+	spin_unlock_irq(&current->sighand->siglock);
+
+	current->state = TASK_INTERRUPTIBLE;
+	schedule();
+	set_thread_flag(TIF_RESTORE_SIGMASK);
+	return -ERESTARTNOHAND;
+}
+
+asmlinkage long
+sys32_sigaltstack(const stack_ia32_t __user *uss_ptr,
+		  stack_ia32_t __user *uoss_ptr, 
+		  struct pt_regs *regs)
+{
+	stack_t uss,uoss; 
+	int ret;
+	mm_segment_t seg; 
+	if (uss_ptr) { 
+		u32 ptr;
+		memset(&uss,0,sizeof(stack_t));
+		if (!access_ok(VERIFY_READ,uss_ptr,sizeof(stack_ia32_t)) ||
+			    __get_user(ptr, &uss_ptr->ss_sp) ||
+			    __get_user(uss.ss_flags, &uss_ptr->ss_flags) ||
+			    __get_user(uss.ss_size, &uss_ptr->ss_size))
+			return -EFAULT;
+		uss.ss_sp = compat_ptr(ptr);
+	}
+	seg = get_fs(); 
+	set_fs(KERNEL_DS); 
+	ret = do_sigaltstack(uss_ptr ? &uss : NULL, &uoss, regs->rsp);
+	set_fs(seg); 
+	if (ret >= 0 && uoss_ptr)  {
+		if (!access_ok(VERIFY_WRITE,uoss_ptr,sizeof(stack_ia32_t)) ||
+		    __put_user(ptr_to_compat(uoss.ss_sp), &uoss_ptr->ss_sp) ||
+		    __put_user(uoss.ss_flags, &uoss_ptr->ss_flags) ||
+		    __put_user(uoss.ss_size, &uoss_ptr->ss_size))
+			ret = -EFAULT;
+	} 	
+	return ret;	
+}
+
+/*
+ * Do a signal return; undo the signal stack.
+ */
+
+struct sigframe
+{
+	u32 pretcode;
+	int sig;
+	struct sigcontext_ia32 sc;
+	struct _fpstate_ia32 fpstate;
+	unsigned int extramask[_COMPAT_NSIG_WORDS-1];
+	char retcode[8];
+};
+
+struct rt_sigframe
+{
+	u32 pretcode;
+	int sig;
+	u32 pinfo;
+	u32 puc;
+	compat_siginfo_t info;
+	struct ucontext_ia32 uc;
+	struct _fpstate_ia32 fpstate;
+	char retcode[8];
+};
+
+static int
+ia32_restore_sigcontext(struct pt_regs *regs, struct sigcontext_ia32 __user *sc, unsigned 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 DEBUG_SIG
+	printk("SIG restore_sigcontext: sc=%p err(%x) eip(%x) cs(%x) flg(%x)\n",
+		sc, sc->err, sc->eip, sc->cs, sc->eflags);
+#endif
+#define COPY(x)		{ \
+	unsigned int reg;			\
+	err |= __get_user(reg, &sc->e ##x);	\
+	regs->r ## x = reg;			\
+}
+
+#define RELOAD_SEG(seg,mask)						\
+	{ unsigned int cur; 						\
+	  unsigned short pre;						\
+	  err |= __get_user(pre, &sc->seg);				\
+    	  asm volatile("movl %%" #seg ",%0" : "=r" (cur));		\
+	  pre |= mask; 							\
+	  if (pre != cur) loadsegment(seg,pre); }
+
+	/* Reload fs and gs if they have changed in the signal handler.
+	   This does not handle long fs/gs base changes in the handler, but 
+	   does not clobber them at least in the normal case. */ 
+	
+	{
+		unsigned gs, oldgs; 
+		err |= __get_user(gs, &sc->gs);
+		gs |= 3; 
+		asm("movl %%gs,%0" : "=r" (oldgs));
+		if (gs != oldgs)
+		load_gs_index(gs); 
+	} 
+	RELOAD_SEG(fs,3);
+	RELOAD_SEG(ds,3);
+	RELOAD_SEG(es,3);
+
+	COPY(di); COPY(si); COPY(bp); COPY(sp); COPY(bx);
+	COPY(dx); COPY(cx); COPY(ip);
+	/* Don't touch extended registers */ 
+	
+	err |= __get_user(regs->cs, &sc->cs); 
+	regs->cs |= 3;  
+	err |= __get_user(regs->ss, &sc->ss); 
+	regs->ss |= 3; 
+
+	{
+		unsigned int tmpflags;
+		err |= __get_user(tmpflags, &sc->eflags);
+		regs->eflags = (regs->eflags & ~0x40DD5) | (tmpflags & 0x40DD5);
+		regs->orig_rax = -1;		/* disable syscall checks */
+	}
+
+	{
+		u32 tmp;
+		struct _fpstate_ia32 __user * buf;
+		err |= __get_user(tmp, &sc->fpstate);
+		buf = compat_ptr(tmp);
+		if (buf) {
+			if (!access_ok(VERIFY_READ, buf, sizeof(*buf)))
+				goto badframe;
+			err |= restore_i387_ia32(current, buf, 0);
+		} else {
+			struct task_struct *me = current;
+			if (used_math()) {
+				clear_fpu(me);
+				clear_used_math();
+			}
+		}
+	}
+
+	{ 
+		u32 tmp;
+		err |= __get_user(tmp, &sc->eax);
+		*peax = tmp;
+	}
+	return err;
+
+badframe:
+	return 1;
+}
+
+asmlinkage long sys32_sigreturn(struct pt_regs *regs)
+{
+	struct sigframe __user *frame = (struct sigframe __user *)(regs->rsp-8);
+	sigset_t set;
+	unsigned 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 (ia32_restore_sigcontext(regs, &frame->sc, &eax))
+		goto badframe;
+	return eax;
+
+badframe:
+	signal_fault(regs, frame, "32bit sigreturn");
+	return 0;
+}	
+
+asmlinkage long sys32_rt_sigreturn(struct pt_regs *regs)
+{
+	struct rt_sigframe __user *frame;
+	sigset_t set;
+	unsigned int eax;
+	struct pt_regs tregs;
+
+	frame = (struct rt_sigframe __user *)(regs->rsp - 4);
+
+	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 (ia32_restore_sigcontext(regs, &frame->uc.uc_mcontext, &eax))
+		goto badframe;
+
+	tregs = *regs;
+	if (sys32_sigaltstack(&frame->uc.uc_stack, NULL, &tregs) == -EFAULT)
+		goto badframe;
+
+	return eax;
+
+badframe:
+	signal_fault(regs,frame,"32bit rt sigreturn");
+	return 0;
+}	
+
+/*
+ * Set up a signal frame.
+ */
+
+static int
+ia32_setup_sigcontext(struct sigcontext_ia32 __user *sc, struct _fpstate_ia32 __user *fpstate,
+		 struct pt_regs *regs, unsigned int mask)
+{
+	int tmp, err = 0;
+
+	tmp = 0;
+	__asm__("movl %%gs,%0" : "=r"(tmp): "0"(tmp));
+	err |= __put_user(tmp, (unsigned int __user *)&sc->gs);
+	__asm__("movl %%fs,%0" : "=r"(tmp): "0"(tmp));
+	err |= __put_user(tmp, (unsigned int __user *)&sc->fs);
+	__asm__("movl %%ds,%0" : "=r"(tmp): "0"(tmp));
+	err |= __put_user(tmp, (unsigned int __user *)&sc->ds);
+	__asm__("movl %%es,%0" : "=r"(tmp): "0"(tmp));
+	err |= __put_user(tmp, (unsigned int __user *)&sc->es);
+
+	err |= __put_user((u32)regs->rdi, &sc->edi);
+	err |= __put_user((u32)regs->rsi, &sc->esi);
+	err |= __put_user((u32)regs->rbp, &sc->ebp);
+	err |= __put_user((u32)regs->rsp, &sc->esp);
+	err |= __put_user((u32)regs->rbx, &sc->ebx);
+	err |= __put_user((u32)regs->rdx, &sc->edx);
+	err |= __put_user((u32)regs->rcx, &sc->ecx);
+	err |= __put_user((u32)regs->rax, &sc->eax);
+	err |= __put_user((u32)regs->cs, &sc->cs);
+	err |= __put_user((u32)regs->ss, &sc->ss);
+	err |= __put_user(current->thread.trap_no, &sc->trapno);
+	err |= __put_user(current->thread.error_code, &sc->err);
+	err |= __put_user((u32)regs->rip, &sc->eip);
+	err |= __put_user((u32)regs->eflags, &sc->eflags);
+	err |= __put_user((u32)regs->rsp, &sc->esp_at_signal);
+
+	tmp = save_i387_ia32(current, fpstate, regs, 0);
+	if (tmp < 0)
+		err = -EFAULT;
+	else { 
+		clear_used_math();
+		stts();
+		err |= __put_user(ptr_to_compat(tmp ? fpstate : NULL),
+					&sc->fpstate);
+	}
+
+	/* non-iBCS2 extensions.. */
+	err |= __put_user(mask, &sc->oldmask);
+	err |= __put_user(current->thread.cr2, &sc->cr2);
+
+	return err;
+}
+
+/*
+ * Determine which stack to use..
+ */
+static void __user *
+get_sigframe(struct k_sigaction *ka, struct pt_regs * regs, size_t frame_size)
+{
+	unsigned long rsp;
+
+	/* Default to using normal stack */
+	rsp = regs->rsp;
+
+	/* This is the X/Open sanctioned signal stack switching.  */
+	if (ka->sa.sa_flags & SA_ONSTACK) {
+		if (sas_ss_flags(rsp) == 0)
+			rsp = current->sas_ss_sp + current->sas_ss_size;
+	}
+
+	/* This is the legacy signal stack switching. */
+	else if ((regs->ss & 0xffff) != __USER_DS &&
+		!(ka->sa.sa_flags & SA_RESTORER) &&
+		 ka->sa.sa_restorer) {
+		rsp = (unsigned long) ka->sa.sa_restorer;
+	}
+
+	rsp -= frame_size;
+	/* Align the stack pointer according to the i386 ABI,
+	 * i.e. so that on function entry ((sp + 4) & 15) == 0. */
+	rsp = ((rsp + 4) & -16ul) - 4;
+	return (void __user *) rsp;
+}
+
+int ia32_setup_frame(int sig, struct k_sigaction *ka,
+		     compat_sigset_t *set, struct pt_regs * regs)
+{
+	struct sigframe __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(sig, &frame->sig);
+	if (err)
+		goto give_sigsegv;
+
+	err |= ia32_setup_sigcontext(&frame->sc, &frame->fpstate, regs,
+					set->sig[0]);
+	if (err)
+		goto give_sigsegv;
+
+	if (_COMPAT_NSIG_WORDS > 1) {
+		err |= __copy_to_user(frame->extramask, &set->sig[1],
+				      sizeof(frame->extramask));
+	}
+	if (err)
+		goto give_sigsegv;
+
+	/* Return stub is in 32bit vsyscall page */
+	{ 
+		void __user *restorer;
+		if (current->binfmt->hasvdso)
+			restorer = VSYSCALL32_SIGRETURN;
+		else
+			restorer = (void *)&frame->retcode;
+		if (ka->sa.sa_flags & SA_RESTORER)
+			restorer = ka->sa.sa_restorer;       
+		err |= __put_user(ptr_to_compat(restorer), &frame->pretcode);
+	}
+	/* These are actually not used anymore, but left because some 
+	   gdb versions depend on them as a marker. */
+	{ 
+		/* copy_to_user optimizes that into a single 8 byte store */
+		static const struct { 
+			u16 poplmovl;
+			u32 val;
+			u16 int80;    
+			u16 pad; 
+		} __attribute__((packed)) code = { 
+			0xb858,		 /* popl %eax ; movl $...,%eax */
+			__NR_ia32_sigreturn,   
+			0x80cd,		/* int $0x80 */
+			0,
+		}; 
+		err |= __copy_to_user(frame->retcode, &code, 8); 
+	}
+	if (err)
+		goto give_sigsegv;
+
+	/* Set up registers for signal handler */
+	regs->rsp = (unsigned long) frame;
+	regs->rip = (unsigned long) ka->sa.sa_handler;
+
+	/* Make -mregparm=3 work */
+	regs->rax = sig;
+	regs->rdx = 0;
+	regs->rcx = 0;
+
+	asm volatile("movl %0,%%ds" :: "r" (__USER32_DS)); 
+	asm volatile("movl %0,%%es" :: "r" (__USER32_DS)); 
+
+	regs->cs = __USER32_CS; 
+	regs->ss = __USER32_DS; 
+
+	set_fs(USER_DS);
+	regs->eflags &= ~TF_MASK;
+	if (test_thread_flag(TIF_SINGLESTEP))
+		ptrace_notify(SIGTRAP);
+
+#if DEBUG_SIG
+	printk("SIG deliver (%s:%d): sp=%p pc=%lx ra=%u\n",
+		current->comm, current->pid, frame, regs->rip, frame->pretcode);
+#endif
+
+	return 0;
+
+give_sigsegv:
+	force_sigsegv(sig, current);
+	return -EFAULT;
+}
+
+int ia32_setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
+			compat_sigset_t *set, struct pt_regs * regs)
+{
+	struct rt_sigframe __user *frame;
+	int err = 0;
+
+	frame = get_sigframe(ka, regs, sizeof(*frame));
+
+	if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
+		goto give_sigsegv;
+
+	{
+		struct exec_domain *ed = current_thread_info()->exec_domain;
+		err |= __put_user((ed
+		    	   && ed->signal_invmap
+		    	   && sig < 32
+		    	   ? ed->signal_invmap[sig]
+			   : sig),
+			  &frame->sig);
+	}
+	err |= __put_user(ptr_to_compat(&frame->info), &frame->pinfo);
+	err |= __put_user(ptr_to_compat(&frame->uc), &frame->puc);
+	err |= copy_siginfo_to_user32(&frame->info, info);
+	if (err)
+		goto give_sigsegv;
+
+	/* 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->rsp),
+			  &frame->uc.uc_stack.ss_flags);
+	err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
+	err |= ia32_setup_sigcontext(&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;
+
+	
+	{ 
+		void __user *restorer = VSYSCALL32_RTSIGRETURN; 
+		if (ka->sa.sa_flags & SA_RESTORER)
+			restorer = ka->sa.sa_restorer;       
+		err |= __put_user(ptr_to_compat(restorer), &frame->pretcode);
+	}
+
+	/* This is movl $,%eax ; int $0x80 */
+	/* Not actually used anymore, but left because some gdb versions
+	   need it. */ 
+	{ 
+		/* __copy_to_user optimizes that into a single 8 byte store */
+		static const struct { 
+			u8 movl; 
+			u32 val; 
+			u16 int80; 
+			u16 pad;
+			u8  pad2;				
+		} __attribute__((packed)) code = { 
+			0xb8,
+			__NR_ia32_rt_sigreturn,
+			0x80cd,
+			0,
+		}; 
+		err |= __copy_to_user(frame->retcode, &code, 8); 
+	} 
+	if (err)
+		goto give_sigsegv;
+
+	/* Set up registers for signal handler */
+	regs->rsp = (unsigned long) frame;
+	regs->rip = (unsigned long) ka->sa.sa_handler;
+
+	/* Make -mregparm=3 work */
+	regs->rax = sig;
+	regs->rdx = (unsigned long) &frame->info;
+	regs->rcx = (unsigned long) &frame->uc;
+
+	/* Make -mregparm=3 work */
+	regs->rax = sig;
+	regs->rdx = (unsigned long) &frame->info;
+	regs->rcx = (unsigned long) &frame->uc;
+
+	asm volatile("movl %0,%%ds" :: "r" (__USER32_DS)); 
+	asm volatile("movl %0,%%es" :: "r" (__USER32_DS)); 
+	
+	regs->cs = __USER32_CS; 
+	regs->ss = __USER32_DS; 
+
+	set_fs(USER_DS);
+	regs->eflags &= ~TF_MASK;
+	if (test_thread_flag(TIF_SINGLESTEP))
+		ptrace_notify(SIGTRAP);
+
+#if DEBUG_SIG
+	printk("SIG deliver (%s:%d): sp=%p pc=%lx ra=%u\n",
+		current->comm, current->pid, frame, regs->rip, frame->pretcode);
+#endif
+
+	return 0;
+
+give_sigsegv:
+	force_sigsegv(sig, current);
+	return -EFAULT;
+}
diff --git a/arch/x86/ia32/ia32entry.S b/arch/x86/ia32/ia32entry.S
new file mode 100644
index 000000000000..18b231810908
--- /dev/null
+++ b/arch/x86/ia32/ia32entry.S
@@ -0,0 +1,736 @@
+/*
+ * Compatibility mode system call entry point for x86-64. 
+ * 		
+ * Copyright 2000-2002 Andi Kleen, SuSE Labs.
+ */		 
+
+#include <asm/dwarf2.h>
+#include <asm/calling.h>
+#include <asm/asm-offsets.h>
+#include <asm/current.h>
+#include <asm/errno.h>
+#include <asm/ia32_unistd.h>	
+#include <asm/thread_info.h>	
+#include <asm/segment.h>
+#include <asm/vsyscall32.h>
+#include <asm/irqflags.h>
+#include <linux/linkage.h>
+
+#define IA32_NR_syscalls ((ia32_syscall_end - ia32_sys_call_table)/8)
+
+	.macro IA32_ARG_FIXUP noebp=0
+	movl	%edi,%r8d
+	.if \noebp
+	.else
+	movl	%ebp,%r9d
+	.endif
+	xchg	%ecx,%esi
+	movl	%ebx,%edi
+	movl	%edx,%edx	/* zero extension */
+	.endm 
+
+	/* clobbers %eax */	
+	.macro  CLEAR_RREGS
+	xorl 	%eax,%eax
+	movq	%rax,R11(%rsp)
+	movq	%rax,R10(%rsp)
+	movq	%rax,R9(%rsp)
+	movq	%rax,R8(%rsp)
+	.endm
+
+	.macro LOAD_ARGS32 offset
+	movl \offset(%rsp),%r11d
+	movl \offset+8(%rsp),%r10d
+	movl \offset+16(%rsp),%r9d
+	movl \offset+24(%rsp),%r8d
+	movl \offset+40(%rsp),%ecx
+	movl \offset+48(%rsp),%edx
+	movl \offset+56(%rsp),%esi
+	movl \offset+64(%rsp),%edi
+	movl \offset+72(%rsp),%eax
+	.endm
+	
+	.macro CFI_STARTPROC32 simple
+	CFI_STARTPROC	\simple
+	CFI_UNDEFINED	r8
+	CFI_UNDEFINED	r9
+	CFI_UNDEFINED	r10
+	CFI_UNDEFINED	r11
+	CFI_UNDEFINED	r12
+	CFI_UNDEFINED	r13
+	CFI_UNDEFINED	r14
+	CFI_UNDEFINED	r15
+	.endm
+
+/*
+ * 32bit SYSENTER instruction entry.
+ *
+ * Arguments:
+ * %eax	System call number.
+ * %ebx Arg1
+ * %ecx Arg2
+ * %edx Arg3
+ * %esi Arg4
+ * %edi Arg5
+ * %ebp user stack
+ * 0(%ebp) Arg6	
+ * 	
+ * Interrupts off.
+ *	
+ * This is purely a fast path. For anything complicated we use the int 0x80
+ * path below.	Set up a complete hardware stack frame to share code
+ * with the int 0x80 path.
+ */ 	
+ENTRY(ia32_sysenter_target)
+	CFI_STARTPROC32	simple
+	CFI_SIGNAL_FRAME
+	CFI_DEF_CFA	rsp,0
+	CFI_REGISTER	rsp,rbp
+	swapgs
+	movq	%gs:pda_kernelstack, %rsp
+	addq	$(PDA_STACKOFFSET),%rsp	
+	/*
+	 * No need to follow this irqs on/off section: the syscall
+	 * disabled irqs, here we enable it straight after entry:
+	 */
+	sti	
+ 	movl	%ebp,%ebp		/* zero extension */
+	pushq	$__USER32_DS
+	CFI_ADJUST_CFA_OFFSET 8
+	/*CFI_REL_OFFSET ss,0*/
+	pushq	%rbp
+	CFI_ADJUST_CFA_OFFSET 8
+	CFI_REL_OFFSET rsp,0
+	pushfq
+	CFI_ADJUST_CFA_OFFSET 8
+	/*CFI_REL_OFFSET rflags,0*/
+	movl	$VSYSCALL32_SYSEXIT, %r10d
+	CFI_REGISTER rip,r10
+	pushq	$__USER32_CS
+	CFI_ADJUST_CFA_OFFSET 8
+	/*CFI_REL_OFFSET cs,0*/
+	movl	%eax, %eax
+	pushq	%r10
+	CFI_ADJUST_CFA_OFFSET 8
+	CFI_REL_OFFSET rip,0
+	pushq	%rax
+	CFI_ADJUST_CFA_OFFSET 8
+	cld
+	SAVE_ARGS 0,0,1
+ 	/* no need to do an access_ok check here because rbp has been
+ 	   32bit zero extended */ 
+1:	movl	(%rbp),%r9d
+ 	.section __ex_table,"a"
+ 	.quad 1b,ia32_badarg
+ 	.previous	
+	GET_THREAD_INFO(%r10)
+	orl    $TS_COMPAT,threadinfo_status(%r10)
+	testl  $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SECCOMP),threadinfo_flags(%r10)
+	CFI_REMEMBER_STATE
+	jnz  sysenter_tracesys
+sysenter_do_call:	
+	cmpl	$(IA32_NR_syscalls-1),%eax
+	ja	ia32_badsys
+	IA32_ARG_FIXUP 1
+	call	*ia32_sys_call_table(,%rax,8)
+	movq	%rax,RAX-ARGOFFSET(%rsp)
+	GET_THREAD_INFO(%r10)
+	cli
+	TRACE_IRQS_OFF
+	testl	$_TIF_ALLWORK_MASK,threadinfo_flags(%r10)
+	jnz	int_ret_from_sys_call
+	andl    $~TS_COMPAT,threadinfo_status(%r10)
+	/* clear IF, that popfq doesn't enable interrupts early */
+	andl  $~0x200,EFLAGS-R11(%rsp) 
+	RESTORE_ARGS 1,24,1,1,1,1
+	popfq
+	CFI_ADJUST_CFA_OFFSET -8
+	/*CFI_RESTORE rflags*/
+	popq	%rcx				/* User %esp */
+	CFI_ADJUST_CFA_OFFSET -8
+	CFI_REGISTER rsp,rcx
+	movl	$VSYSCALL32_SYSEXIT,%edx	/* User %eip */
+	CFI_REGISTER rip,rdx
+	TRACE_IRQS_ON
+	swapgs
+	sti		/* sti only takes effect after the next instruction */
+	/* sysexit */
+	.byte	0xf, 0x35
+
+sysenter_tracesys:
+	CFI_RESTORE_STATE
+	SAVE_REST
+	CLEAR_RREGS
+	movq	$-ENOSYS,RAX(%rsp)	/* really needed? */
+	movq	%rsp,%rdi        /* &pt_regs -> arg1 */
+	call	syscall_trace_enter
+	LOAD_ARGS32 ARGOFFSET  /* reload args from stack in case ptrace changed it */
+	RESTORE_REST
+	movl	%ebp, %ebp
+	/* no need to do an access_ok check here because rbp has been
+	   32bit zero extended */ 
+1:	movl	(%rbp),%r9d
+	.section __ex_table,"a"
+	.quad 1b,ia32_badarg
+	.previous
+	jmp	sysenter_do_call
+	CFI_ENDPROC
+ENDPROC(ia32_sysenter_target)
+
+/*
+ * 32bit SYSCALL instruction entry.
+ *
+ * Arguments:
+ * %eax	System call number.
+ * %ebx Arg1
+ * %ecx return EIP 
+ * %edx Arg3
+ * %esi Arg4
+ * %edi Arg5
+ * %ebp Arg2    [note: not saved in the stack frame, should not be touched]
+ * %esp user stack 
+ * 0(%esp) Arg6
+ * 	
+ * Interrupts off.
+ *	
+ * This is purely a fast path. For anything complicated we use the int 0x80
+ * path below.	Set up a complete hardware stack frame to share code
+ * with the int 0x80 path.	
+ */ 	
+ENTRY(ia32_cstar_target)
+	CFI_STARTPROC32	simple
+	CFI_SIGNAL_FRAME
+	CFI_DEF_CFA	rsp,PDA_STACKOFFSET
+	CFI_REGISTER	rip,rcx
+	/*CFI_REGISTER	rflags,r11*/
+	swapgs
+	movl	%esp,%r8d
+	CFI_REGISTER	rsp,r8
+	movq	%gs:pda_kernelstack,%rsp
+	/*
+	 * No need to follow this irqs on/off section: the syscall
+	 * disabled irqs and here we enable it straight after entry:
+	 */
+	sti
+	SAVE_ARGS 8,1,1
+	movl 	%eax,%eax	/* zero extension */
+	movq	%rax,ORIG_RAX-ARGOFFSET(%rsp)
+	movq	%rcx,RIP-ARGOFFSET(%rsp)
+	CFI_REL_OFFSET rip,RIP-ARGOFFSET
+	movq	%rbp,RCX-ARGOFFSET(%rsp) /* this lies slightly to ptrace */
+	movl	%ebp,%ecx
+	movq	$__USER32_CS,CS-ARGOFFSET(%rsp)
+	movq	$__USER32_DS,SS-ARGOFFSET(%rsp)
+	movq	%r11,EFLAGS-ARGOFFSET(%rsp)
+	/*CFI_REL_OFFSET rflags,EFLAGS-ARGOFFSET*/
+	movq	%r8,RSP-ARGOFFSET(%rsp)	
+	CFI_REL_OFFSET rsp,RSP-ARGOFFSET
+	/* no need to do an access_ok check here because r8 has been
+	   32bit zero extended */ 
+	/* hardware stack frame is complete now */	
+1:	movl	(%r8),%r9d
+	.section __ex_table,"a"
+	.quad 1b,ia32_badarg
+	.previous	
+	GET_THREAD_INFO(%r10)
+	orl   $TS_COMPAT,threadinfo_status(%r10)
+	testl $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SECCOMP),threadinfo_flags(%r10)
+	CFI_REMEMBER_STATE
+	jnz   cstar_tracesys
+cstar_do_call:	
+	cmpl $IA32_NR_syscalls-1,%eax
+	ja  ia32_badsys
+	IA32_ARG_FIXUP 1
+	call *ia32_sys_call_table(,%rax,8)
+	movq %rax,RAX-ARGOFFSET(%rsp)
+	GET_THREAD_INFO(%r10)
+	cli
+	TRACE_IRQS_OFF
+	testl $_TIF_ALLWORK_MASK,threadinfo_flags(%r10)
+	jnz  int_ret_from_sys_call
+	andl $~TS_COMPAT,threadinfo_status(%r10)
+	RESTORE_ARGS 1,-ARG_SKIP,1,1,1
+	movl RIP-ARGOFFSET(%rsp),%ecx
+	CFI_REGISTER rip,rcx
+	movl EFLAGS-ARGOFFSET(%rsp),%r11d	
+	/*CFI_REGISTER rflags,r11*/
+	TRACE_IRQS_ON
+	movl RSP-ARGOFFSET(%rsp),%esp
+	CFI_RESTORE rsp
+	swapgs
+	sysretl
+	
+cstar_tracesys:	
+	CFI_RESTORE_STATE
+	SAVE_REST
+	CLEAR_RREGS
+	movq $-ENOSYS,RAX(%rsp)	/* really needed? */
+	movq %rsp,%rdi        /* &pt_regs -> arg1 */
+	call syscall_trace_enter
+	LOAD_ARGS32 ARGOFFSET  /* reload args from stack in case ptrace changed it */
+	RESTORE_REST
+	movl RSP-ARGOFFSET(%rsp), %r8d
+	/* no need to do an access_ok check here because r8 has been
+	   32bit zero extended */ 
+1:	movl	(%r8),%r9d
+	.section __ex_table,"a"
+	.quad 1b,ia32_badarg
+	.previous
+	jmp cstar_do_call
+END(ia32_cstar_target)
+				
+ia32_badarg:
+	movq $-EFAULT,%rax
+	jmp ia32_sysret
+	CFI_ENDPROC
+
+/* 
+ * Emulated IA32 system calls via int 0x80. 
+ *
+ * Arguments:	 
+ * %eax	System call number.
+ * %ebx Arg1
+ * %ecx Arg2
+ * %edx Arg3
+ * %esi Arg4
+ * %edi Arg5
+ * %ebp Arg6    [note: not saved in the stack frame, should not be touched]
+ *
+ * Notes:
+ * Uses the same stack frame as the x86-64 version.	
+ * All registers except %eax must be saved (but ptrace may violate that)
+ * Arguments are zero extended. For system calls that want sign extension and
+ * take long arguments a wrapper is needed. Most calls can just be called
+ * directly.
+ * Assumes it is only called from user space and entered with interrupts off.	
+ */ 				
+
+ENTRY(ia32_syscall)
+	CFI_STARTPROC32	simple
+	CFI_SIGNAL_FRAME
+	CFI_DEF_CFA	rsp,SS+8-RIP
+	/*CFI_REL_OFFSET	ss,SS-RIP*/
+	CFI_REL_OFFSET	rsp,RSP-RIP
+	/*CFI_REL_OFFSET	rflags,EFLAGS-RIP*/
+	/*CFI_REL_OFFSET	cs,CS-RIP*/
+	CFI_REL_OFFSET	rip,RIP-RIP
+	swapgs
+	/*
+	 * No need to follow this irqs on/off section: the syscall
+	 * disabled irqs and here we enable it straight after entry:
+	 */
+	sti
+	movl %eax,%eax
+	pushq %rax
+	CFI_ADJUST_CFA_OFFSET 8
+	cld
+	/* note the registers are not zero extended to the sf.
+	   this could be a problem. */
+	SAVE_ARGS 0,0,1
+	GET_THREAD_INFO(%r10)
+	orl   $TS_COMPAT,threadinfo_status(%r10)
+	testl $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SECCOMP),threadinfo_flags(%r10)
+	jnz ia32_tracesys
+ia32_do_syscall:	
+	cmpl $(IA32_NR_syscalls-1),%eax
+	ja  ia32_badsys
+	IA32_ARG_FIXUP
+	call *ia32_sys_call_table(,%rax,8) # xxx: rip relative
+ia32_sysret:
+	movq %rax,RAX-ARGOFFSET(%rsp)
+	jmp int_ret_from_sys_call 
+
+ia32_tracesys:			 
+	SAVE_REST
+	CLEAR_RREGS
+	movq $-ENOSYS,RAX(%rsp)	/* really needed? */
+	movq %rsp,%rdi        /* &pt_regs -> arg1 */
+	call syscall_trace_enter
+	LOAD_ARGS32 ARGOFFSET  /* reload args from stack in case ptrace changed it */
+	RESTORE_REST
+	jmp ia32_do_syscall
+END(ia32_syscall)
+
+ia32_badsys:
+	movq $0,ORIG_RAX-ARGOFFSET(%rsp)
+	movq $-ENOSYS,RAX-ARGOFFSET(%rsp)
+	jmp int_ret_from_sys_call
+
+quiet_ni_syscall:
+	movq $-ENOSYS,%rax
+	ret
+	CFI_ENDPROC
+	
+	.macro PTREGSCALL label, func, arg
+	.globl \label
+\label:
+	leaq \func(%rip),%rax
+	leaq -ARGOFFSET+8(%rsp),\arg	/* 8 for return address */
+	jmp  ia32_ptregs_common	
+	.endm
+
+	CFI_STARTPROC32
+
+	PTREGSCALL stub32_rt_sigreturn, sys32_rt_sigreturn, %rdi
+	PTREGSCALL stub32_sigreturn, sys32_sigreturn, %rdi
+	PTREGSCALL stub32_sigaltstack, sys32_sigaltstack, %rdx
+	PTREGSCALL stub32_sigsuspend, sys32_sigsuspend, %rcx
+	PTREGSCALL stub32_execve, sys32_execve, %rcx
+	PTREGSCALL stub32_fork, sys_fork, %rdi
+	PTREGSCALL stub32_clone, sys32_clone, %rdx
+	PTREGSCALL stub32_vfork, sys_vfork, %rdi
+	PTREGSCALL stub32_iopl, sys_iopl, %rsi
+	PTREGSCALL stub32_rt_sigsuspend, sys_rt_sigsuspend, %rdx
+
+ENTRY(ia32_ptregs_common)
+	popq %r11
+	CFI_ENDPROC
+	CFI_STARTPROC32	simple
+	CFI_SIGNAL_FRAME
+	CFI_DEF_CFA	rsp,SS+8-ARGOFFSET
+	CFI_REL_OFFSET	rax,RAX-ARGOFFSET
+	CFI_REL_OFFSET	rcx,RCX-ARGOFFSET
+	CFI_REL_OFFSET	rdx,RDX-ARGOFFSET
+	CFI_REL_OFFSET	rsi,RSI-ARGOFFSET
+	CFI_REL_OFFSET	rdi,RDI-ARGOFFSET
+	CFI_REL_OFFSET	rip,RIP-ARGOFFSET
+/*	CFI_REL_OFFSET	cs,CS-ARGOFFSET*/
+/*	CFI_REL_OFFSET	rflags,EFLAGS-ARGOFFSET*/
+	CFI_REL_OFFSET	rsp,RSP-ARGOFFSET
+/*	CFI_REL_OFFSET	ss,SS-ARGOFFSET*/
+	SAVE_REST
+	call *%rax
+	RESTORE_REST
+	jmp  ia32_sysret	/* misbalances the return cache */
+	CFI_ENDPROC
+END(ia32_ptregs_common)
+
+	.section .rodata,"a"
+	.align 8
+ia32_sys_call_table:
+	.quad sys_restart_syscall
+	.quad sys_exit
+	.quad stub32_fork
+	.quad sys_read
+	.quad sys_write
+	.quad compat_sys_open		/* 5 */
+	.quad sys_close
+	.quad sys32_waitpid
+	.quad sys_creat
+	.quad sys_link
+	.quad sys_unlink		/* 10 */
+	.quad stub32_execve
+	.quad sys_chdir
+	.quad compat_sys_time
+	.quad sys_mknod
+	.quad sys_chmod		/* 15 */
+	.quad sys_lchown16
+	.quad quiet_ni_syscall			/* old break syscall holder */
+	.quad sys_stat
+	.quad sys32_lseek
+	.quad sys_getpid		/* 20 */
+	.quad compat_sys_mount	/* mount  */
+	.quad sys_oldumount	/* old_umount  */
+	.quad sys_setuid16
+	.quad sys_getuid16
+	.quad compat_sys_stime	/* stime */		/* 25 */
+	.quad sys32_ptrace	/* ptrace */
+	.quad sys_alarm
+	.quad sys_fstat	/* (old)fstat */
+	.quad sys_pause
+	.quad compat_sys_utime	/* 30 */
+	.quad quiet_ni_syscall	/* old stty syscall holder */
+	.quad quiet_ni_syscall	/* old gtty syscall holder */
+	.quad sys_access
+	.quad sys_nice	
+	.quad quiet_ni_syscall	/* 35 */	/* old ftime syscall holder */
+	.quad sys_sync
+	.quad sys32_kill
+	.quad sys_rename
+	.quad sys_mkdir
+	.quad sys_rmdir		/* 40 */
+	.quad sys_dup
+	.quad sys32_pipe
+	.quad compat_sys_times
+	.quad quiet_ni_syscall			/* old prof syscall holder */
+	.quad sys_brk		/* 45 */
+	.quad sys_setgid16
+	.quad sys_getgid16
+	.quad sys_signal
+	.quad sys_geteuid16
+	.quad sys_getegid16	/* 50 */
+	.quad sys_acct
+	.quad sys_umount			/* new_umount */
+	.quad quiet_ni_syscall			/* old lock syscall holder */
+	.quad compat_sys_ioctl
+	.quad compat_sys_fcntl64		/* 55 */
+	.quad quiet_ni_syscall			/* old mpx syscall holder */
+	.quad sys_setpgid
+	.quad quiet_ni_syscall			/* old ulimit syscall holder */
+	.quad sys32_olduname
+	.quad sys_umask		/* 60 */
+	.quad sys_chroot
+	.quad sys32_ustat
+	.quad sys_dup2
+	.quad sys_getppid
+	.quad sys_getpgrp		/* 65 */
+	.quad sys_setsid
+	.quad sys32_sigaction
+	.quad sys_sgetmask
+	.quad sys_ssetmask
+	.quad sys_setreuid16	/* 70 */
+	.quad sys_setregid16
+	.quad stub32_sigsuspend
+	.quad compat_sys_sigpending
+	.quad sys_sethostname
+	.quad compat_sys_setrlimit	/* 75 */
+	.quad compat_sys_old_getrlimit	/* old_getrlimit */
+	.quad compat_sys_getrusage
+	.quad sys32_gettimeofday
+	.quad sys32_settimeofday
+	.quad sys_getgroups16	/* 80 */
+	.quad sys_setgroups16
+	.quad sys32_old_select
+	.quad sys_symlink
+	.quad sys_lstat
+	.quad sys_readlink		/* 85 */
+	.quad sys_uselib
+	.quad sys_swapon
+	.quad sys_reboot
+	.quad compat_sys_old_readdir
+	.quad sys32_mmap		/* 90 */
+	.quad sys_munmap
+	.quad sys_truncate
+	.quad sys_ftruncate
+	.quad sys_fchmod
+	.quad sys_fchown16		/* 95 */
+	.quad sys_getpriority
+	.quad sys_setpriority
+	.quad quiet_ni_syscall			/* old profil syscall holder */
+	.quad compat_sys_statfs
+	.quad compat_sys_fstatfs		/* 100 */
+	.quad sys_ioperm
+	.quad compat_sys_socketcall
+	.quad sys_syslog
+	.quad compat_sys_setitimer
+	.quad compat_sys_getitimer	/* 105 */
+	.quad compat_sys_newstat
+	.quad compat_sys_newlstat
+	.quad compat_sys_newfstat
+	.quad sys32_uname
+	.quad stub32_iopl		/* 110 */
+	.quad sys_vhangup
+	.quad quiet_ni_syscall	/* old "idle" system call */
+	.quad sys32_vm86_warning	/* vm86old */ 
+	.quad compat_sys_wait4
+	.quad sys_swapoff		/* 115 */
+	.quad compat_sys_sysinfo
+	.quad sys32_ipc
+	.quad sys_fsync
+	.quad stub32_sigreturn
+	.quad stub32_clone		/* 120 */
+	.quad sys_setdomainname
+	.quad sys_uname
+	.quad sys_modify_ldt
+	.quad compat_sys_adjtimex
+	.quad sys32_mprotect		/* 125 */
+	.quad compat_sys_sigprocmask
+	.quad quiet_ni_syscall		/* create_module */
+	.quad sys_init_module
+	.quad sys_delete_module
+	.quad quiet_ni_syscall		/* 130  get_kernel_syms */
+	.quad sys32_quotactl
+	.quad sys_getpgid
+	.quad sys_fchdir
+	.quad quiet_ni_syscall	/* bdflush */
+	.quad sys_sysfs		/* 135 */
+	.quad sys_personality
+	.quad quiet_ni_syscall	/* for afs_syscall */
+	.quad sys_setfsuid16
+	.quad sys_setfsgid16
+	.quad sys_llseek		/* 140 */
+	.quad compat_sys_getdents
+	.quad compat_sys_select
+	.quad sys_flock
+	.quad sys_msync
+	.quad compat_sys_readv		/* 145 */
+	.quad compat_sys_writev
+	.quad sys_getsid
+	.quad sys_fdatasync
+	.quad sys32_sysctl	/* sysctl */
+	.quad sys_mlock		/* 150 */
+	.quad sys_munlock
+	.quad sys_mlockall
+	.quad sys_munlockall
+	.quad sys_sched_setparam
+	.quad sys_sched_getparam   /* 155 */
+	.quad sys_sched_setscheduler
+	.quad sys_sched_getscheduler
+	.quad sys_sched_yield
+	.quad sys_sched_get_priority_max
+	.quad sys_sched_get_priority_min  /* 160 */
+	.quad sys32_sched_rr_get_interval
+	.quad compat_sys_nanosleep
+	.quad sys_mremap
+	.quad sys_setresuid16
+	.quad sys_getresuid16	/* 165 */
+	.quad sys32_vm86_warning	/* vm86 */ 
+	.quad quiet_ni_syscall	/* query_module */
+	.quad sys_poll
+	.quad compat_sys_nfsservctl
+	.quad sys_setresgid16	/* 170 */
+	.quad sys_getresgid16
+	.quad sys_prctl
+	.quad stub32_rt_sigreturn
+	.quad sys32_rt_sigaction
+	.quad sys32_rt_sigprocmask	/* 175 */
+	.quad sys32_rt_sigpending
+	.quad compat_sys_rt_sigtimedwait
+	.quad sys32_rt_sigqueueinfo
+	.quad stub32_rt_sigsuspend
+	.quad sys32_pread		/* 180 */
+	.quad sys32_pwrite
+	.quad sys_chown16
+	.quad sys_getcwd
+	.quad sys_capget
+	.quad sys_capset
+	.quad stub32_sigaltstack
+	.quad sys32_sendfile
+	.quad quiet_ni_syscall		/* streams1 */
+	.quad quiet_ni_syscall		/* streams2 */
+	.quad stub32_vfork            /* 190 */
+	.quad compat_sys_getrlimit
+	.quad sys32_mmap2
+	.quad sys32_truncate64
+	.quad sys32_ftruncate64
+	.quad sys32_stat64		/* 195 */
+	.quad sys32_lstat64
+	.quad sys32_fstat64
+	.quad sys_lchown
+	.quad sys_getuid
+	.quad sys_getgid		/* 200 */
+	.quad sys_geteuid
+	.quad sys_getegid
+	.quad sys_setreuid
+	.quad sys_setregid
+	.quad sys_getgroups	/* 205 */
+	.quad sys_setgroups
+	.quad sys_fchown
+	.quad sys_setresuid
+	.quad sys_getresuid
+	.quad sys_setresgid	/* 210 */
+	.quad sys_getresgid
+	.quad sys_chown
+	.quad sys_setuid
+	.quad sys_setgid
+	.quad sys_setfsuid		/* 215 */
+	.quad sys_setfsgid
+	.quad sys_pivot_root
+	.quad sys_mincore
+	.quad sys_madvise
+	.quad compat_sys_getdents64	/* 220 getdents64 */
+	.quad compat_sys_fcntl64	
+	.quad quiet_ni_syscall		/* tux */
+	.quad quiet_ni_syscall    	/* security */
+	.quad sys_gettid	
+	.quad sys32_readahead	/* 225 */
+	.quad sys_setxattr
+	.quad sys_lsetxattr
+	.quad sys_fsetxattr
+	.quad sys_getxattr
+	.quad sys_lgetxattr	/* 230 */
+	.quad sys_fgetxattr
+	.quad sys_listxattr
+	.quad sys_llistxattr
+	.quad sys_flistxattr
+	.quad sys_removexattr	/* 235 */
+	.quad sys_lremovexattr
+	.quad sys_fremovexattr
+	.quad sys_tkill
+	.quad sys_sendfile64 
+	.quad compat_sys_futex		/* 240 */
+	.quad compat_sys_sched_setaffinity
+	.quad compat_sys_sched_getaffinity
+	.quad sys32_set_thread_area
+	.quad sys32_get_thread_area
+	.quad compat_sys_io_setup	/* 245 */
+	.quad sys_io_destroy
+	.quad compat_sys_io_getevents
+	.quad compat_sys_io_submit
+	.quad sys_io_cancel
+	.quad sys32_fadvise64		/* 250 */
+	.quad quiet_ni_syscall 	/* free_huge_pages */
+	.quad sys_exit_group
+	.quad sys32_lookup_dcookie
+	.quad sys_epoll_create
+	.quad sys_epoll_ctl		/* 255 */
+	.quad sys_epoll_wait
+	.quad sys_remap_file_pages
+	.quad sys_set_tid_address
+	.quad compat_sys_timer_create
+	.quad compat_sys_timer_settime	/* 260 */
+	.quad compat_sys_timer_gettime
+	.quad sys_timer_getoverrun
+	.quad sys_timer_delete
+	.quad compat_sys_clock_settime
+	.quad compat_sys_clock_gettime	/* 265 */
+	.quad compat_sys_clock_getres
+	.quad compat_sys_clock_nanosleep
+	.quad compat_sys_statfs64
+	.quad compat_sys_fstatfs64
+	.quad sys_tgkill		/* 270 */
+	.quad compat_sys_utimes
+	.quad sys32_fadvise64_64
+	.quad quiet_ni_syscall	/* sys_vserver */
+	.quad sys_mbind
+	.quad compat_sys_get_mempolicy	/* 275 */
+	.quad sys_set_mempolicy
+	.quad compat_sys_mq_open
+	.quad sys_mq_unlink
+	.quad compat_sys_mq_timedsend
+	.quad compat_sys_mq_timedreceive	/* 280 */
+	.quad compat_sys_mq_notify
+	.quad compat_sys_mq_getsetattr
+	.quad compat_sys_kexec_load	/* reserved for kexec */
+	.quad compat_sys_waitid
+	.quad quiet_ni_syscall		/* 285: sys_altroot */
+	.quad sys_add_key
+	.quad sys_request_key
+	.quad sys_keyctl
+	.quad sys_ioprio_set
+	.quad sys_ioprio_get		/* 290 */
+	.quad sys_inotify_init
+	.quad sys_inotify_add_watch
+	.quad sys_inotify_rm_watch
+	.quad sys_migrate_pages
+	.quad compat_sys_openat		/* 295 */
+	.quad sys_mkdirat
+	.quad sys_mknodat
+	.quad sys_fchownat
+	.quad compat_sys_futimesat
+	.quad sys32_fstatat		/* 300 */
+	.quad sys_unlinkat
+	.quad sys_renameat
+	.quad sys_linkat
+	.quad sys_symlinkat
+	.quad sys_readlinkat		/* 305 */
+	.quad sys_fchmodat
+	.quad sys_faccessat
+	.quad compat_sys_pselect6
+	.quad compat_sys_ppoll
+	.quad sys_unshare		/* 310 */
+	.quad compat_sys_set_robust_list
+	.quad compat_sys_get_robust_list
+	.quad sys_splice
+	.quad sys32_sync_file_range
+	.quad sys_tee			/* 315 */
+	.quad compat_sys_vmsplice
+	.quad compat_sys_move_pages
+	.quad sys_getcpu
+	.quad sys_epoll_pwait
+	.quad compat_sys_utimensat	/* 320 */
+	.quad compat_sys_signalfd
+	.quad compat_sys_timerfd
+	.quad sys_eventfd
+	.quad sys32_fallocate
+ia32_syscall_end:
diff --git a/arch/x86/ia32/ipc32.c b/arch/x86/ia32/ipc32.c
new file mode 100644
index 000000000000..369151dc3213
--- /dev/null
+++ b/arch/x86/ia32/ipc32.c
@@ -0,0 +1,57 @@
+#include <linux/kernel.h>
+#include <linux/spinlock.h>
+#include <linux/list.h>
+#include <linux/syscalls.h>
+#include <linux/time.h>
+#include <linux/sem.h>
+#include <linux/msg.h>
+#include <linux/shm.h>
+#include <linux/ipc.h>
+#include <linux/compat.h>
+
+#include <asm-i386/ipc.h>
+
+asmlinkage long
+sys32_ipc(u32 call, int first, int second, int third,
+		compat_uptr_t ptr, u32 fifth)
+{
+	int version;
+
+	version = call >> 16; /* hack for backward compatibility */
+	call &= 0xffff;
+
+	switch (call) {
+	      case SEMOP:
+		/* struct sembuf is the same on 32 and 64bit :)) */
+		return sys_semtimedop(first, compat_ptr(ptr), second, NULL);
+	      case SEMTIMEDOP:
+		return compat_sys_semtimedop(first, compat_ptr(ptr), second,
+						compat_ptr(fifth));
+	      case SEMGET:
+		return sys_semget(first, second, third);
+	      case SEMCTL:
+		return compat_sys_semctl(first, second, third, compat_ptr(ptr));
+
+	      case MSGSND:
+		return compat_sys_msgsnd(first, second, third, compat_ptr(ptr));
+	      case MSGRCV:
+		return compat_sys_msgrcv(first, second, fifth, third,
+					 version, compat_ptr(ptr));
+	      case MSGGET:
+		return sys_msgget((key_t) first, second);
+	      case MSGCTL:
+		return compat_sys_msgctl(first, second, compat_ptr(ptr));
+
+	      case SHMAT:
+		return compat_sys_shmat(first, second, third, version,
+					compat_ptr(ptr));
+		break;
+	      case SHMDT:
+		return sys_shmdt(compat_ptr(ptr));
+	      case SHMGET:
+		return sys_shmget(first, (unsigned)second, third);
+	      case SHMCTL:
+		return compat_sys_shmctl(first, second, compat_ptr(ptr));
+	}
+	return -ENOSYS;
+}
diff --git a/arch/x86/ia32/mmap32.c b/arch/x86/ia32/mmap32.c
new file mode 100644
index 000000000000..e4b84b4a417a
--- /dev/null
+++ b/arch/x86/ia32/mmap32.c
@@ -0,0 +1,79 @@
+/*
+ *  linux/arch/x86_64/ia32/mm/mmap.c
+ *
+ *  flexible mmap layout support
+ *
+ * Based on the i386 version which was
+ *
+ * Copyright 2003-2004 Red Hat Inc., Durham, North Carolina.
+ * All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ *
+ * Started by Ingo Molnar <mingo@elte.hu>
+ */
+
+#include <linux/personality.h>
+#include <linux/mm.h>
+#include <linux/random.h>
+#include <linux/sched.h>
+
+/*
+ * Top of mmap area (just below the process stack).
+ *
+ * Leave an at least ~128 MB hole.
+ */
+#define MIN_GAP (128*1024*1024)
+#define MAX_GAP (TASK_SIZE/6*5)
+
+static inline unsigned long mmap_base(struct mm_struct *mm)
+{
+	unsigned long gap = current->signal->rlim[RLIMIT_STACK].rlim_cur;
+	unsigned long random_factor = 0;
+
+	if (current->flags & PF_RANDOMIZE)
+		random_factor = get_random_int() % (1024*1024);
+
+	if (gap < MIN_GAP)
+		gap = MIN_GAP;
+	else if (gap > MAX_GAP)
+		gap = MAX_GAP;
+
+	return PAGE_ALIGN(TASK_SIZE - gap - random_factor);
+}
+
+/*
+ * This function, called very early during the creation of a new
+ * process VM image, sets up which VM layout function to use:
+ */
+void ia32_pick_mmap_layout(struct mm_struct *mm)
+{
+	/*
+	 * Fall back to the standard layout if the personality
+	 * bit is set, or if the expected stack growth is unlimited:
+	 */
+	if (sysctl_legacy_va_layout ||
+			(current->personality & ADDR_COMPAT_LAYOUT) ||
+			current->signal->rlim[RLIMIT_STACK].rlim_cur == RLIM_INFINITY) {
+		mm->mmap_base = TASK_UNMAPPED_BASE;
+		mm->get_unmapped_area = arch_get_unmapped_area;
+		mm->unmap_area = arch_unmap_area;
+	} else {
+		mm->mmap_base = mmap_base(mm);
+		mm->get_unmapped_area = arch_get_unmapped_area_topdown;
+		mm->unmap_area = arch_unmap_area_topdown;
+	}
+}
diff --git a/arch/x86/ia32/ptrace32.c b/arch/x86/ia32/ptrace32.c
new file mode 100644
index 000000000000..4a233ad6269c
--- /dev/null
+++ b/arch/x86/ia32/ptrace32.c
@@ -0,0 +1,404 @@
+/* 
+ * 32bit ptrace for x86-64.
+ *
+ * Copyright 2001,2002 Andi Kleen, SuSE Labs.
+ * Some parts copied from arch/i386/kernel/ptrace.c. See that file for earlier 
+ * copyright.
+ * 
+ * This allows to access 64bit processes too; but there is no way to see the extended 
+ * register contents.
+ */ 
+
+#include <linux/kernel.h>
+#include <linux/stddef.h>
+#include <linux/sched.h>
+#include <linux/syscalls.h>
+#include <linux/unistd.h>
+#include <linux/mm.h>
+#include <linux/err.h>
+#include <linux/ptrace.h>
+#include <asm/ptrace.h>
+#include <asm/compat.h>
+#include <asm/uaccess.h>
+#include <asm/user32.h>
+#include <asm/user.h>
+#include <asm/errno.h>
+#include <asm/debugreg.h>
+#include <asm/i387.h>
+#include <asm/fpu32.h>
+#include <asm/ia32.h>
+
+/*
+ * Determines which flags the user has access to [1 = access, 0 = no access].
+ * Prohibits changing ID(21), VIP(20), VIF(19), VM(17), IOPL(12-13), IF(9).
+ * Also masks reserved bits (31-22, 15, 5, 3, 1).
+ */
+#define FLAG_MASK 0x54dd5UL
+
+#define R32(l,q) \
+	case offsetof(struct user32, regs.l): stack[offsetof(struct pt_regs, q)/8] = val; break
+
+static int putreg32(struct task_struct *child, unsigned regno, u32 val)
+{
+	int i;
+	__u64 *stack = (__u64 *)task_pt_regs(child);
+
+	switch (regno) {
+	case offsetof(struct user32, regs.fs):
+		if (val && (val & 3) != 3) return -EIO; 
+		child->thread.fsindex = val & 0xffff;
+		break;
+	case offsetof(struct user32, regs.gs):
+		if (val && (val & 3) != 3) return -EIO; 
+		child->thread.gsindex = val & 0xffff;
+		break;
+	case offsetof(struct user32, regs.ds):
+		if (val && (val & 3) != 3) return -EIO; 
+		child->thread.ds = val & 0xffff;
+		break;
+	case offsetof(struct user32, regs.es):
+		child->thread.es = val & 0xffff;
+		break;
+	case offsetof(struct user32, regs.ss): 
+		if ((val & 3) != 3) return -EIO;
+        	stack[offsetof(struct pt_regs, ss)/8] = val & 0xffff;
+		break;
+	case offsetof(struct user32, regs.cs): 
+		if ((val & 3) != 3) return -EIO;
+		stack[offsetof(struct pt_regs, cs)/8] = val & 0xffff;
+		break;
+
+	R32(ebx, rbx); 
+	R32(ecx, rcx);
+	R32(edx, rdx);
+	R32(edi, rdi);
+	R32(esi, rsi);
+	R32(ebp, rbp);
+	R32(eax, rax);
+	R32(orig_eax, orig_rax);
+	R32(eip, rip);
+	R32(esp, rsp);
+
+	case offsetof(struct user32, regs.eflags): {
+		__u64 *flags = &stack[offsetof(struct pt_regs, eflags)/8];
+		val &= FLAG_MASK;
+		*flags = val | (*flags & ~FLAG_MASK);
+		break;
+	}
+
+	case offsetof(struct user32, u_debugreg[4]): 
+	case offsetof(struct user32, u_debugreg[5]):
+		return -EIO;
+
+	case offsetof(struct user32, u_debugreg[0]):
+		child->thread.debugreg0 = val;
+		break;
+
+	case offsetof(struct user32, u_debugreg[1]):
+		child->thread.debugreg1 = val;
+		break;
+
+	case offsetof(struct user32, u_debugreg[2]):
+		child->thread.debugreg2 = val;
+		break;
+
+	case offsetof(struct user32, u_debugreg[3]):
+		child->thread.debugreg3 = val;
+		break;
+
+	case offsetof(struct user32, u_debugreg[6]):
+		child->thread.debugreg6 = val;
+		break; 
+
+	case offsetof(struct user32, u_debugreg[7]):
+		val &= ~DR_CONTROL_RESERVED;
+		/* See arch/i386/kernel/ptrace.c for an explanation of
+		 * this awkward check.*/
+		for(i=0; i<4; i++)
+			if ((0x5454 >> ((val >> (16 + 4*i)) & 0xf)) & 1)
+			       return -EIO;
+		child->thread.debugreg7 = val; 
+		if (val)
+			set_tsk_thread_flag(child, TIF_DEBUG);
+		else
+			clear_tsk_thread_flag(child, TIF_DEBUG);
+		break; 
+		    
+	default:
+		if (regno > sizeof(struct user32) || (regno & 3))
+			return -EIO;
+	       
+		/* Other dummy fields in the virtual user structure are ignored */ 
+		break; 		
+	}
+	return 0;
+}
+
+#undef R32
+
+#define R32(l,q) \
+	case offsetof(struct user32, regs.l): *val = stack[offsetof(struct pt_regs, q)/8]; break
+
+static int getreg32(struct task_struct *child, unsigned regno, u32 *val)
+{
+	__u64 *stack = (__u64 *)task_pt_regs(child);
+
+	switch (regno) {
+	case offsetof(struct user32, regs.fs):
+	        *val = child->thread.fsindex;
+		break;
+	case offsetof(struct user32, regs.gs):
+		*val = child->thread.gsindex;
+		break;
+	case offsetof(struct user32, regs.ds):
+		*val = child->thread.ds;
+		break;
+	case offsetof(struct user32, regs.es):
+		*val = child->thread.es;
+		break;
+
+	R32(cs, cs);
+	R32(ss, ss);
+	R32(ebx, rbx); 
+	R32(ecx, rcx);
+	R32(edx, rdx);
+	R32(edi, rdi);
+	R32(esi, rsi);
+	R32(ebp, rbp);
+	R32(eax, rax);
+	R32(orig_eax, orig_rax);
+	R32(eip, rip);
+	R32(eflags, eflags);
+	R32(esp, rsp);
+
+	case offsetof(struct user32, u_debugreg[0]): 
+		*val = child->thread.debugreg0; 
+		break; 
+	case offsetof(struct user32, u_debugreg[1]): 
+		*val = child->thread.debugreg1; 
+		break; 
+	case offsetof(struct user32, u_debugreg[2]): 
+		*val = child->thread.debugreg2; 
+		break; 
+	case offsetof(struct user32, u_debugreg[3]): 
+		*val = child->thread.debugreg3; 
+		break; 
+	case offsetof(struct user32, u_debugreg[6]): 
+		*val = child->thread.debugreg6; 
+		break; 
+	case offsetof(struct user32, u_debugreg[7]): 
+		*val = child->thread.debugreg7; 
+		break; 
+		    
+	default:
+		if (regno > sizeof(struct user32) || (regno & 3))
+			return -EIO;
+
+		/* Other dummy fields in the virtual user structure are ignored */ 
+		*val = 0;
+		break; 		
+	}
+	return 0;
+}
+
+#undef R32
+
+static long ptrace32_siginfo(unsigned request, u32 pid, u32 addr, u32 data)
+{
+	int ret;
+	compat_siginfo_t __user *si32 = compat_ptr(data);
+	siginfo_t ssi; 
+	siginfo_t __user *si = compat_alloc_user_space(sizeof(siginfo_t));
+	if (request == PTRACE_SETSIGINFO) {
+		memset(&ssi, 0, sizeof(siginfo_t));
+		ret = copy_siginfo_from_user32(&ssi, si32);
+		if (ret)
+			return ret;
+		if (copy_to_user(si, &ssi, sizeof(siginfo_t)))
+			return -EFAULT;
+	}
+	ret = sys_ptrace(request, pid, addr, (unsigned long)si);
+	if (ret)
+		return ret;
+	if (request == PTRACE_GETSIGINFO) {
+		if (copy_from_user(&ssi, si, sizeof(siginfo_t)))
+			return -EFAULT;
+		ret = copy_siginfo_to_user32(si32, &ssi);
+	}
+	return ret;
+}
+
+asmlinkage long sys32_ptrace(long request, u32 pid, u32 addr, u32 data)
+{
+	struct task_struct *child;
+	struct pt_regs *childregs; 
+	void __user *datap = compat_ptr(data);
+	int ret;
+	__u32 val;
+
+	switch (request) { 
+	case PTRACE_TRACEME:
+	case PTRACE_ATTACH:
+	case PTRACE_KILL:
+	case PTRACE_CONT:
+	case PTRACE_SINGLESTEP:
+	case PTRACE_DETACH:
+	case PTRACE_SYSCALL:
+	case PTRACE_OLDSETOPTIONS:
+	case PTRACE_SETOPTIONS:
+	case PTRACE_SET_THREAD_AREA:
+	case PTRACE_GET_THREAD_AREA:
+		return sys_ptrace(request, pid, addr, data); 
+
+	default:
+		return -EINVAL;
+
+	case PTRACE_PEEKTEXT:
+	case PTRACE_PEEKDATA:
+	case PTRACE_POKEDATA:
+	case PTRACE_POKETEXT:
+	case PTRACE_POKEUSR:       
+	case PTRACE_PEEKUSR:
+	case PTRACE_GETREGS:
+	case PTRACE_SETREGS:
+	case PTRACE_SETFPREGS:
+	case PTRACE_GETFPREGS:
+	case PTRACE_SETFPXREGS:
+	case PTRACE_GETFPXREGS:
+	case PTRACE_GETEVENTMSG:
+		break;
+
+	case PTRACE_SETSIGINFO:
+	case PTRACE_GETSIGINFO:
+		return ptrace32_siginfo(request, pid, addr, data);
+	}
+
+	child = ptrace_get_task_struct(pid);
+	if (IS_ERR(child))
+		return PTR_ERR(child);
+
+	ret = ptrace_check_attach(child, request == PTRACE_KILL);
+	if (ret < 0)
+		goto out;
+
+	childregs = task_pt_regs(child);
+
+	switch (request) {
+	case PTRACE_PEEKDATA:
+	case PTRACE_PEEKTEXT:
+		ret = 0;
+		if (access_process_vm(child, addr, &val, sizeof(u32), 0)!=sizeof(u32))
+			ret = -EIO;
+		else
+			ret = put_user(val, (unsigned int __user *)datap); 
+		break; 
+
+	case PTRACE_POKEDATA:
+	case PTRACE_POKETEXT:
+		ret = 0;
+		if (access_process_vm(child, addr, &data, sizeof(u32), 1)!=sizeof(u32))
+			ret = -EIO; 
+		break;
+
+	case PTRACE_PEEKUSR:
+		ret = getreg32(child, addr, &val);
+		if (ret == 0)
+			ret = put_user(val, (__u32 __user *)datap);
+		break;
+
+	case PTRACE_POKEUSR:
+		ret = putreg32(child, addr, data);
+		break;
+
+	case PTRACE_GETREGS: { /* Get all gp regs from the child. */
+		int i;
+	  	if (!access_ok(VERIFY_WRITE, datap, 16*4)) {
+			ret = -EIO;
+			break;
+		}
+		ret = 0;
+		for ( i = 0; i <= 16*4 ; i += sizeof(__u32) ) {
+			getreg32(child, i, &val);
+			ret |= __put_user(val,(u32 __user *)datap);
+			datap += sizeof(u32);
+		}
+		break;
+	}
+
+	case PTRACE_SETREGS: { /* Set all gp regs in the child. */
+		unsigned long tmp;
+		int i;
+	  	if (!access_ok(VERIFY_READ, datap, 16*4)) {
+			ret = -EIO;
+			break;
+		}
+		ret = 0; 
+		for ( i = 0; i <= 16*4; i += sizeof(u32) ) {
+			ret |= __get_user(tmp, (u32 __user *)datap);
+			putreg32(child, i, tmp);
+			datap += sizeof(u32);
+		}
+		break;
+	}
+
+	case PTRACE_GETFPREGS:
+		ret = -EIO; 
+		if (!access_ok(VERIFY_READ, compat_ptr(data), 
+			       sizeof(struct user_i387_struct)))
+			break;
+		save_i387_ia32(child, datap, childregs, 1);
+		ret = 0; 
+			break;
+
+	case PTRACE_SETFPREGS:
+		ret = -EIO;
+		if (!access_ok(VERIFY_WRITE, datap, 
+			       sizeof(struct user_i387_struct)))
+			break;
+		ret = 0;
+		/* don't check EFAULT to be bug-to-bug compatible to i386 */
+		restore_i387_ia32(child, datap, 1);
+		break;
+
+	case PTRACE_GETFPXREGS: { 
+		struct user32_fxsr_struct __user *u = datap;
+		init_fpu(child); 
+		ret = -EIO;
+		if (!access_ok(VERIFY_WRITE, u, sizeof(*u)))
+			break;
+			ret = -EFAULT;
+		if (__copy_to_user(u, &child->thread.i387.fxsave, sizeof(*u)))
+			break;
+		ret = __put_user(childregs->cs, &u->fcs);
+		ret |= __put_user(child->thread.ds, &u->fos); 
+		break; 
+	} 
+	case PTRACE_SETFPXREGS: { 
+		struct user32_fxsr_struct __user *u = datap;
+		unlazy_fpu(child);
+		ret = -EIO;
+		if (!access_ok(VERIFY_READ, u, sizeof(*u)))
+			break;
+		/* no checking to be bug-to-bug compatible with i386. */
+		/* but silence warning */
+		if (__copy_from_user(&child->thread.i387.fxsave, u, sizeof(*u)))
+			;
+		set_stopped_child_used_math(child);
+		child->thread.i387.fxsave.mxcsr &= mxcsr_feature_mask;
+		ret = 0; 
+		break;
+	}
+
+	case PTRACE_GETEVENTMSG:
+		ret = put_user(child->ptrace_message,(unsigned int __user *)compat_ptr(data));
+		break;
+
+	default:
+		BUG();
+	}
+
+ out:
+	put_task_struct(child);
+	return ret;
+}
+
diff --git a/arch/x86/ia32/sys_ia32.c b/arch/x86/ia32/sys_ia32.c
new file mode 100644
index 000000000000..bee96d614432
--- /dev/null
+++ b/arch/x86/ia32/sys_ia32.c
@@ -0,0 +1,889 @@
+/*
+ * sys_ia32.c: Conversion between 32bit and 64bit native syscalls. Based on
+ *             sys_sparc32 
+ *
+ * Copyright (C) 2000		VA Linux Co
+ * Copyright (C) 2000		Don Dugger <n0ano@valinux.com>
+ * Copyright (C) 1999 		Arun Sharma <arun.sharma@intel.com>
+ * Copyright (C) 1997,1998 	Jakub Jelinek (jj@sunsite.mff.cuni.cz)
+ * Copyright (C) 1997 		David S. Miller (davem@caip.rutgers.edu)
+ * Copyright (C) 2000		Hewlett-Packard Co.
+ * Copyright (C) 2000		David Mosberger-Tang <davidm@hpl.hp.com>
+ * Copyright (C) 2000,2001,2002	Andi Kleen, SuSE Labs (x86-64 port) 
+ *
+ * These routines maintain argument size conversion between 32bit and 64bit
+ * environment. In 2.5 most of this should be moved to a generic directory. 
+ *
+ * This file assumes that there is a hole at the end of user address space.
+ * 
+ * Some of the functions are LE specific currently. These are hopefully all marked.
+ * This should be fixed.
+ */
+
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/fs.h> 
+#include <linux/file.h> 
+#include <linux/signal.h>
+#include <linux/syscalls.h>
+#include <linux/resource.h>
+#include <linux/times.h>
+#include <linux/utsname.h>
+#include <linux/smp.h>
+#include <linux/smp_lock.h>
+#include <linux/sem.h>
+#include <linux/msg.h>
+#include <linux/mm.h>
+#include <linux/shm.h>
+#include <linux/slab.h>
+#include <linux/uio.h>
+#include <linux/nfs_fs.h>
+#include <linux/quota.h>
+#include <linux/module.h>
+#include <linux/sunrpc/svc.h>
+#include <linux/nfsd/nfsd.h>
+#include <linux/nfsd/cache.h>
+#include <linux/nfsd/xdr.h>
+#include <linux/nfsd/syscall.h>
+#include <linux/poll.h>
+#include <linux/personality.h>
+#include <linux/stat.h>
+#include <linux/ipc.h>
+#include <linux/rwsem.h>
+#include <linux/binfmts.h>
+#include <linux/init.h>
+#include <linux/aio_abi.h>
+#include <linux/aio.h>
+#include <linux/compat.h>
+#include <linux/vfs.h>
+#include <linux/ptrace.h>
+#include <linux/highuid.h>
+#include <linux/vmalloc.h>
+#include <linux/fsnotify.h>
+#include <linux/sysctl.h>
+#include <asm/mman.h>
+#include <asm/types.h>
+#include <asm/uaccess.h>
+#include <asm/semaphore.h>
+#include <asm/atomic.h>
+#include <asm/ldt.h>
+
+#include <net/scm.h>
+#include <net/sock.h>
+#include <asm/ia32.h>
+
+#define AA(__x)		((unsigned long)(__x))
+
+int cp_compat_stat(struct kstat *kbuf, struct compat_stat __user *ubuf)
+{
+	compat_ino_t ino;
+
+	typeof(ubuf->st_uid) uid = 0;
+	typeof(ubuf->st_gid) gid = 0;
+	SET_UID(uid, kbuf->uid);
+	SET_GID(gid, kbuf->gid);
+	if (!old_valid_dev(kbuf->dev) || !old_valid_dev(kbuf->rdev))
+		return -EOVERFLOW;
+	if (kbuf->size >= 0x7fffffff)
+		return -EOVERFLOW;
+	ino = kbuf->ino;
+	if (sizeof(ino) < sizeof(kbuf->ino) && ino != kbuf->ino)
+		return -EOVERFLOW;
+	if (!access_ok(VERIFY_WRITE, ubuf, sizeof(struct compat_stat)) ||
+	    __put_user (old_encode_dev(kbuf->dev), &ubuf->st_dev) ||
+	    __put_user (ino, &ubuf->st_ino) ||
+	    __put_user (kbuf->mode, &ubuf->st_mode) ||
+	    __put_user (kbuf->nlink, &ubuf->st_nlink) ||
+	    __put_user (uid, &ubuf->st_uid) ||
+	    __put_user (gid, &ubuf->st_gid) ||
+	    __put_user (old_encode_dev(kbuf->rdev), &ubuf->st_rdev) ||
+	    __put_user (kbuf->size, &ubuf->st_size) ||
+	    __put_user (kbuf->atime.tv_sec, &ubuf->st_atime) ||
+	    __put_user (kbuf->atime.tv_nsec, &ubuf->st_atime_nsec) ||
+	    __put_user (kbuf->mtime.tv_sec, &ubuf->st_mtime) ||
+	    __put_user (kbuf->mtime.tv_nsec, &ubuf->st_mtime_nsec) ||
+	    __put_user (kbuf->ctime.tv_sec, &ubuf->st_ctime) ||
+	    __put_user (kbuf->ctime.tv_nsec, &ubuf->st_ctime_nsec) ||
+	    __put_user (kbuf->blksize, &ubuf->st_blksize) ||
+	    __put_user (kbuf->blocks, &ubuf->st_blocks))
+		return -EFAULT;
+	return 0;
+}
+
+asmlinkage long
+sys32_truncate64(char __user * filename, unsigned long offset_low, unsigned long offset_high)
+{
+       return sys_truncate(filename, ((loff_t) offset_high << 32) | offset_low);
+}
+
+asmlinkage long
+sys32_ftruncate64(unsigned int fd, unsigned long offset_low, unsigned long offset_high)
+{
+       return sys_ftruncate(fd, ((loff_t) offset_high << 32) | offset_low);
+}
+
+/* Another set for IA32/LFS -- x86_64 struct stat is different due to 
+   support for 64bit inode numbers. */
+
+static int
+cp_stat64(struct stat64 __user *ubuf, struct kstat *stat)
+{
+	typeof(ubuf->st_uid) uid = 0;
+	typeof(ubuf->st_gid) gid = 0;
+	SET_UID(uid, stat->uid);
+	SET_GID(gid, stat->gid);
+	if (!access_ok(VERIFY_WRITE, ubuf, sizeof(struct stat64)) ||
+	    __put_user(huge_encode_dev(stat->dev), &ubuf->st_dev) ||
+	    __put_user (stat->ino, &ubuf->__st_ino) ||
+	    __put_user (stat->ino, &ubuf->st_ino) ||
+	    __put_user (stat->mode, &ubuf->st_mode) ||
+	    __put_user (stat->nlink, &ubuf->st_nlink) ||
+	    __put_user (uid, &ubuf->st_uid) ||
+	    __put_user (gid, &ubuf->st_gid) ||
+	    __put_user (huge_encode_dev(stat->rdev), &ubuf->st_rdev) ||
+	    __put_user (stat->size, &ubuf->st_size) ||
+	    __put_user (stat->atime.tv_sec, &ubuf->st_atime) ||
+	    __put_user (stat->atime.tv_nsec, &ubuf->st_atime_nsec) ||
+	    __put_user (stat->mtime.tv_sec, &ubuf->st_mtime) ||
+	    __put_user (stat->mtime.tv_nsec, &ubuf->st_mtime_nsec) ||
+	    __put_user (stat->ctime.tv_sec, &ubuf->st_ctime) ||
+	    __put_user (stat->ctime.tv_nsec, &ubuf->st_ctime_nsec) ||
+	    __put_user (stat->blksize, &ubuf->st_blksize) ||
+	    __put_user (stat->blocks, &ubuf->st_blocks))
+		return -EFAULT;
+	return 0;
+}
+
+asmlinkage long
+sys32_stat64(char __user * filename, struct stat64 __user *statbuf)
+{
+	struct kstat stat;
+	int ret = vfs_stat(filename, &stat);
+	if (!ret)
+		ret = cp_stat64(statbuf, &stat);
+	return ret;
+}
+
+asmlinkage long
+sys32_lstat64(char __user * filename, struct stat64 __user *statbuf)
+{
+	struct kstat stat;
+	int ret = vfs_lstat(filename, &stat);
+	if (!ret)
+		ret = cp_stat64(statbuf, &stat);
+	return ret;
+}
+
+asmlinkage long
+sys32_fstat64(unsigned int fd, struct stat64 __user *statbuf)
+{
+	struct kstat stat;
+	int ret = vfs_fstat(fd, &stat);
+	if (!ret)
+		ret = cp_stat64(statbuf, &stat);
+	return ret;
+}
+
+asmlinkage long
+sys32_fstatat(unsigned int dfd, char __user *filename,
+	      struct stat64 __user* statbuf, int flag)
+{
+	struct kstat stat;
+	int error = -EINVAL;
+
+	if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0)
+		goto out;
+
+	if (flag & AT_SYMLINK_NOFOLLOW)
+		error = vfs_lstat_fd(dfd, filename, &stat);
+	else
+		error = vfs_stat_fd(dfd, filename, &stat);
+
+	if (!error)
+		error = cp_stat64(statbuf, &stat);
+
+out:
+	return error;
+}
+
+/*
+ * Linux/i386 didn't use to be able to handle more than
+ * 4 system call parameters, so these system calls used a memory
+ * block for parameter passing..
+ */
+
+struct mmap_arg_struct {
+	unsigned int addr;
+	unsigned int len;
+	unsigned int prot;
+	unsigned int flags;
+	unsigned int fd;
+	unsigned int offset;
+};
+
+asmlinkage long
+sys32_mmap(struct mmap_arg_struct __user *arg)
+{
+	struct mmap_arg_struct a;
+	struct file *file = NULL;
+	unsigned long retval;
+	struct mm_struct *mm ;
+
+	if (copy_from_user(&a, arg, sizeof(a)))
+		return -EFAULT;
+
+	if (a.offset & ~PAGE_MASK)
+		return -EINVAL; 
+
+	if (!(a.flags & MAP_ANONYMOUS)) {
+		file = fget(a.fd);
+		if (!file)
+			return -EBADF;
+	}
+	
+	mm = current->mm; 
+	down_write(&mm->mmap_sem); 
+	retval = do_mmap_pgoff(file, a.addr, a.len, a.prot, a.flags, a.offset>>PAGE_SHIFT);
+	if (file)
+		fput(file);
+
+	up_write(&mm->mmap_sem); 
+
+	return retval;
+}
+
+asmlinkage long 
+sys32_mprotect(unsigned long start, size_t len, unsigned long prot)
+{
+	return sys_mprotect(start,len,prot); 
+}
+
+asmlinkage long
+sys32_pipe(int __user *fd)
+{
+	int retval;
+	int fds[2];
+
+	retval = do_pipe(fds);
+	if (retval)
+		goto out;
+	if (copy_to_user(fd, fds, sizeof(fds)))
+		retval = -EFAULT;
+  out:
+	return retval;
+}
+
+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;
+	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, restorer;
+
+		if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
+		    __get_user(handler, &act->sa_handler) ||
+		    __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
+		    __get_user(restorer, &act->sa_restorer)||
+		    __copy_from_user(&set32, &act->sa_mask, sizeof(compat_sigset_t)))
+			return -EFAULT;
+		new_ka.sa.sa_handler = compat_ptr(handler);
+		new_ka.sa.sa_restorer = compat_ptr(restorer);
+		/* FIXME: here we rely on _COMPAT_NSIG_WORS to be >= than _NSIG_WORDS << 1 */
+		switch (_NSIG_WORDS) {
+		case 4: new_ka.sa.sa_mask.sig[3] = set32.sig[6]
+				| (((long)set32.sig[7]) << 32);
+		case 3: new_ka.sa.sa_mask.sig[2] = set32.sig[4]
+				| (((long)set32.sig[5]) << 32);
+		case 2: new_ka.sa.sa_mask.sig[1] = set32.sig[2]
+				| (((long)set32.sig[3]) << 32);
+		case 1: new_ka.sa.sa_mask.sig[0] = set32.sig[0]
+				| (((long)set32.sig[1]) << 32);
+		}
+	}
+
+	ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
+
+	if (!ret && oact) {
+		/* FIXME: here we rely on _COMPAT_NSIG_WORS to be >= than _NSIG_WORDS << 1 */
+		switch (_NSIG_WORDS) {
+		case 4:
+			set32.sig[7] = (old_ka.sa.sa_mask.sig[3] >> 32);
+			set32.sig[6] = old_ka.sa.sa_mask.sig[3];
+		case 3:
+			set32.sig[5] = (old_ka.sa.sa_mask.sig[2] >> 32);
+			set32.sig[4] = old_ka.sa.sa_mask.sig[2];
+		case 2:
+			set32.sig[3] = (old_ka.sa.sa_mask.sig[1] >> 32);
+			set32.sig[2] = old_ka.sa.sa_mask.sig[1];
+		case 1:
+			set32.sig[1] = (old_ka.sa.sa_mask.sig[0] >> 32);
+			set32.sig[0] = old_ka.sa.sa_mask.sig[0];
+		}
+		if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
+		    __put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler) ||
+		    __put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer) ||
+		    __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
+		    __copy_to_user(&oact->sa_mask, &set32, sizeof(compat_sigset_t)))
+			return -EFAULT;
+	}
+
+	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;
+        int ret;
+
+        if (act) {
+		compat_old_sigset_t mask;
+		compat_uptr_t handler, restorer;
+
+		if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
+		    __get_user(handler, &act->sa_handler) ||
+		    __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
+		    __get_user(restorer, &act->sa_restorer) ||
+		    __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 (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
+		    __put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler) ||
+		    __put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer) ||
+		    __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
+		    __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
+			return -EFAULT;
+        }
+
+	return ret;
+}
+
+asmlinkage long
+sys32_rt_sigprocmask(int how, compat_sigset_t __user *set,
+			compat_sigset_t __user *oset, unsigned int sigsetsize)
+{
+	sigset_t s;
+	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;
+		switch (_NSIG_WORDS) {
+		case 4: s.sig[3] = s32.sig[6] | (((long)s32.sig[7]) << 32);
+		case 3: s.sig[2] = s32.sig[4] | (((long)s32.sig[5]) << 32);
+		case 2: s.sig[1] = s32.sig[2] | (((long)s32.sig[3]) << 32);
+		case 1: s.sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32);
+		}
+	}
+	set_fs (KERNEL_DS);
+	ret = sys_rt_sigprocmask(how,
+				 set ? (sigset_t __user *)&s : NULL,
+				 oset ? (sigset_t __user *)&s : NULL,
+				 sigsetsize); 
+	set_fs (old_fs);
+	if (ret) return ret;
+	if (oset) {
+		switch (_NSIG_WORDS) {
+		case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
+		case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
+		case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
+		case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
+		}
+		if (copy_to_user (oset, &s32, sizeof(compat_sigset_t)))
+			return -EFAULT;
+	}
+	return 0;
+}
+
+static inline long
+get_tv32(struct timeval *o, struct compat_timeval __user *i)
+{
+	int err = -EFAULT; 
+	if (access_ok(VERIFY_READ, i, sizeof(*i))) { 
+		err = __get_user(o->tv_sec, &i->tv_sec);
+		err |= __get_user(o->tv_usec, &i->tv_usec);
+	}
+	return err; 
+}
+
+static inline long
+put_tv32(struct compat_timeval __user *o, struct timeval *i)
+{
+	int err = -EFAULT;
+	if (access_ok(VERIFY_WRITE, o, sizeof(*o))) { 
+		err = __put_user(i->tv_sec, &o->tv_sec);
+		err |= __put_user(i->tv_usec, &o->tv_usec);
+	} 
+	return err; 
+}
+
+extern unsigned int alarm_setitimer(unsigned int seconds);
+
+asmlinkage long
+sys32_alarm(unsigned int seconds)
+{
+	return alarm_setitimer(seconds);
+}
+
+/* Translations due to time_t size differences.  Which affects all
+   sorts of things, like timeval and itimerval.  */
+
+extern struct timezone sys_tz;
+
+asmlinkage long
+sys32_gettimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
+{
+	if (tv) {
+		struct timeval ktv;
+		do_gettimeofday(&ktv);
+		if (put_tv32(tv, &ktv))
+			return -EFAULT;
+	}
+	if (tz) {
+		if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
+			return -EFAULT;
+	}
+	return 0;
+}
+
+asmlinkage long
+sys32_settimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
+{
+	struct timeval ktv;
+	struct timespec kts;
+	struct timezone ktz;
+
+ 	if (tv) {
+		if (get_tv32(&ktv, tv))
+			return -EFAULT;
+		kts.tv_sec = ktv.tv_sec;
+		kts.tv_nsec = ktv.tv_usec * NSEC_PER_USEC;
+	}
+	if (tz) {
+		if (copy_from_user(&ktz, tz, sizeof(ktz)))
+			return -EFAULT;
+	}
+
+	return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
+}
+
+struct sel_arg_struct {
+	unsigned int n;
+	unsigned int inp;
+	unsigned int outp;
+	unsigned int exp;
+	unsigned int tvp;
+};
+
+asmlinkage long
+sys32_old_select(struct sel_arg_struct __user *arg)
+{
+	struct sel_arg_struct a;
+
+	if (copy_from_user(&a, arg, sizeof(a)))
+		return -EFAULT;
+	return compat_sys_select(a.n, compat_ptr(a.inp), compat_ptr(a.outp),
+				 compat_ptr(a.exp), compat_ptr(a.tvp));
+}
+
+extern asmlinkage long
+compat_sys_wait4(compat_pid_t pid, compat_uint_t * stat_addr, int options,
+		 struct compat_rusage *ru);
+
+asmlinkage long
+sys32_waitpid(compat_pid_t pid, unsigned int *stat_addr, int options)
+{
+	return compat_sys_wait4(pid, stat_addr, options, NULL);
+}
+
+/* 32-bit timeval and related flotsam.  */
+
+asmlinkage long
+sys32_sysfs(int option, u32 arg1, u32 arg2)
+{
+	return sys_sysfs(option, arg1, arg2);
+}
+
+asmlinkage long
+sys32_sched_rr_get_interval(compat_pid_t pid, struct compat_timespec __user *interval)
+{
+	struct timespec t;
+	int ret;
+	mm_segment_t old_fs = get_fs ();
+	
+	set_fs (KERNEL_DS);
+	ret = sys_sched_rr_get_interval(pid, (struct timespec __user *)&t);
+	set_fs (old_fs);
+	if (put_compat_timespec(&t, interval))
+		return -EFAULT;
+	return ret;
+}
+
+asmlinkage 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);
+	ret = sys_rt_sigpending((sigset_t __user *)&s, sigsetsize);
+	set_fs (old_fs);
+	if (!ret) {
+		switch (_NSIG_WORDS) {
+		case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
+		case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
+		case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
+		case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
+		}
+		if (copy_to_user (set, &s32, sizeof(compat_sigset_t)))
+			return -EFAULT;
+	}
+	return ret;
+}
+
+asmlinkage long
+sys32_rt_sigqueueinfo(int pid, int sig, compat_siginfo_t __user *uinfo)
+{
+	siginfo_t info;
+	int ret;
+	mm_segment_t old_fs = get_fs();
+	
+	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;
+}
+
+/* These are here just in case some old ia32 binary calls it. */
+asmlinkage long
+sys32_pause(void)
+{
+	current->state = TASK_INTERRUPTIBLE;
+	schedule();
+	return -ERESTARTNOHAND;
+}
+
+
+#ifdef CONFIG_SYSCTL_SYSCALL
+struct sysctl_ia32 {
+	unsigned int	name;
+	int		nlen;
+	unsigned int	oldval;
+	unsigned int	oldlenp;
+	unsigned int	newval;
+	unsigned int	newlen;
+	unsigned int	__unused[4];
+};
+
+
+asmlinkage long
+sys32_sysctl(struct sysctl_ia32 __user *args32)
+{
+	struct sysctl_ia32 a32;
+	mm_segment_t old_fs = get_fs ();
+	void __user *oldvalp, *newvalp;
+	size_t oldlen;
+	int __user *namep;
+	long ret;
+
+	if (copy_from_user(&a32, args32, sizeof (a32)))
+		return -EFAULT;
+
+	/*
+	 * We need to pre-validate these because we have to disable address checking
+	 * before calling do_sysctl() because of OLDLEN but we can't run the risk of the
+	 * user specifying bad addresses here.  Well, since we're dealing with 32 bit
+	 * addresses, we KNOW that access_ok() will always succeed, so this is an
+	 * expensive NOP, but so what...
+	 */
+	namep = compat_ptr(a32.name);
+	oldvalp = compat_ptr(a32.oldval);
+	newvalp =  compat_ptr(a32.newval);
+
+	if ((oldvalp && get_user(oldlen, (int __user *)compat_ptr(a32.oldlenp)))
+	    || !access_ok(VERIFY_WRITE, namep, 0)
+	    || !access_ok(VERIFY_WRITE, oldvalp, 0)
+	    || !access_ok(VERIFY_WRITE, newvalp, 0))
+		return -EFAULT;
+
+	set_fs(KERNEL_DS);
+	lock_kernel();
+	ret = do_sysctl(namep, a32.nlen, oldvalp, (size_t __user *)&oldlen,
+			newvalp, (size_t) a32.newlen);
+	unlock_kernel();
+	set_fs(old_fs);
+
+	if (oldvalp && put_user (oldlen, (int __user *)compat_ptr(a32.oldlenp)))
+		return -EFAULT;
+
+	return ret;
+}
+#endif
+
+/* warning: next two assume little endian */ 
+asmlinkage long
+sys32_pread(unsigned int fd, char __user *ubuf, u32 count, u32 poslo, u32 poshi)
+{
+	return sys_pread64(fd, ubuf, count,
+			 ((loff_t)AA(poshi) << 32) | AA(poslo));
+}
+
+asmlinkage long
+sys32_pwrite(unsigned int fd, char __user *ubuf, u32 count, u32 poslo, u32 poshi)
+{
+	return sys_pwrite64(fd, ubuf, count,
+			  ((loff_t)AA(poshi) << 32) | AA(poslo));
+}
+
+
+asmlinkage long
+sys32_personality(unsigned long personality)
+{
+	int ret;
+	if (personality(current->personality) == PER_LINUX32 && 
+		personality == PER_LINUX)
+		personality = PER_LINUX32;
+	ret = sys_personality(personality);
+	if (ret == PER_LINUX32)
+		ret = PER_LINUX;
+	return ret;
+}
+
+asmlinkage long
+sys32_sendfile(int out_fd, int in_fd, compat_off_t __user *offset, s32 count)
+{
+	mm_segment_t old_fs = get_fs();
+	int ret;
+	off_t of;
+	
+	if (offset && get_user(of, offset))
+		return -EFAULT;
+		
+	set_fs(KERNEL_DS);
+	ret = sys_sendfile(out_fd, in_fd, offset ? (off_t __user *)&of : NULL,
+			   count);
+	set_fs(old_fs);
+	
+	if (offset && put_user(of, offset))
+		return -EFAULT;
+		
+	return ret;
+}
+
+asmlinkage long sys32_mmap2(unsigned long addr, unsigned long len,
+	unsigned long prot, unsigned long flags,
+	unsigned long fd, unsigned long pgoff)
+{
+	struct mm_struct *mm = current->mm;
+	unsigned long error;
+	struct file * file = NULL;
+
+	flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
+	if (!(flags & MAP_ANONYMOUS)) {
+		file = fget(fd);
+		if (!file)
+			return -EBADF;
+	}
+
+	down_write(&mm->mmap_sem);
+	error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
+	up_write(&mm->mmap_sem);
+
+	if (file)
+		fput(file);
+	return error;
+}
+
+asmlinkage long sys32_olduname(struct oldold_utsname __user * name)
+{
+	int err;
+
+	if (!name)
+		return -EFAULT;
+	if (!access_ok(VERIFY_WRITE, name, sizeof(struct oldold_utsname)))
+		return -EFAULT;
+  
+  	down_read(&uts_sem);
+
+	err = __copy_to_user(&name->sysname,&utsname()->sysname,
+				__OLD_UTS_LEN);
+	err |= __put_user(0,name->sysname+__OLD_UTS_LEN);
+	err |= __copy_to_user(&name->nodename,&utsname()->nodename,
+				__OLD_UTS_LEN);
+	err |= __put_user(0,name->nodename+__OLD_UTS_LEN);
+	err |= __copy_to_user(&name->release,&utsname()->release,
+				__OLD_UTS_LEN);
+	err |= __put_user(0,name->release+__OLD_UTS_LEN);
+	err |= __copy_to_user(&name->version,&utsname()->version,
+				__OLD_UTS_LEN);
+	err |= __put_user(0,name->version+__OLD_UTS_LEN);
+	{
+		char *arch = "x86_64";
+		if (personality(current->personality) == PER_LINUX32)
+			arch = "i686";
+		 
+		err |= __copy_to_user(&name->machine, arch, strlen(arch)+1);
+	}
+
+	up_read(&uts_sem);
+
+	err = err ? -EFAULT : 0;
+
+	return err;
+}
+
+long sys32_uname(struct old_utsname __user * name)
+{
+	int err;
+	if (!name)
+		return -EFAULT;
+	down_read(&uts_sem);
+	err = copy_to_user(name, utsname(), sizeof (*name));
+	up_read(&uts_sem);
+	if (personality(current->personality) == PER_LINUX32) 
+		err |= copy_to_user(&name->machine, "i686", 5);
+	return err?-EFAULT:0;
+}
+
+long sys32_ustat(unsigned dev, struct ustat32 __user *u32p)
+{
+	struct ustat u;
+	mm_segment_t seg;
+	int ret;
+	
+	seg = get_fs(); 
+	set_fs(KERNEL_DS); 
+	ret = sys_ustat(dev, (struct ustat __user *)&u);
+	set_fs(seg);
+	if (ret >= 0) { 
+		if (!access_ok(VERIFY_WRITE,u32p,sizeof(struct ustat32)) || 
+		    __put_user((__u32) u.f_tfree, &u32p->f_tfree) ||
+		    __put_user((__u32) u.f_tinode, &u32p->f_tfree) ||
+		    __copy_to_user(&u32p->f_fname, u.f_fname, sizeof(u.f_fname)) ||
+		    __copy_to_user(&u32p->f_fpack, u.f_fpack, sizeof(u.f_fpack)))
+			ret = -EFAULT;
+	}
+	return ret;
+} 
+
+asmlinkage long sys32_execve(char __user *name, compat_uptr_t __user *argv,
+			     compat_uptr_t __user *envp, struct pt_regs *regs)
+{
+	long error;
+	char * filename;
+
+	filename = getname(name);
+	error = PTR_ERR(filename);
+	if (IS_ERR(filename))
+		return error;
+	error = compat_do_execve(filename, argv, envp, regs);
+	if (error == 0) {
+		task_lock(current);
+		current->ptrace &= ~PT_DTRACE;
+		task_unlock(current);
+	}
+	putname(filename);
+	return error;
+}
+
+asmlinkage long sys32_clone(unsigned int clone_flags, unsigned int newsp,
+			    struct pt_regs *regs)
+{
+	void __user *parent_tid = (void __user *)regs->rdx;
+	void __user *child_tid = (void __user *)regs->rdi;
+	if (!newsp)
+		newsp = regs->rsp;
+        return do_fork(clone_flags, newsp, regs, 0, parent_tid, child_tid);
+}
+
+/*
+ * Some system calls that need sign extended arguments. This could be done by a generic wrapper.
+ */ 
+
+long sys32_lseek (unsigned int fd, int offset, unsigned int whence)
+{
+	return sys_lseek(fd, offset, whence);
+}
+
+long sys32_kill(int pid, int sig)
+{
+	return sys_kill(pid, sig);
+}
+ 
+long sys32_fadvise64_64(int fd, __u32 offset_low, __u32 offset_high, 
+			__u32 len_low, __u32 len_high, int advice)
+{ 
+	return sys_fadvise64_64(fd,
+			       (((u64)offset_high)<<32) | offset_low,
+			       (((u64)len_high)<<32) | len_low,
+			       advice); 
+} 
+
+long sys32_vm86_warning(void)
+{ 
+	struct task_struct *me = current;
+	static char lastcomm[sizeof(me->comm)];
+	if (strncmp(lastcomm, me->comm, sizeof(lastcomm))) {
+		compat_printk(KERN_INFO "%s: vm86 mode not supported on 64 bit kernel\n",
+		       me->comm);
+		strncpy(lastcomm, me->comm, sizeof(lastcomm));
+	} 
+	return -ENOSYS;
+} 
+
+long sys32_lookup_dcookie(u32 addr_low, u32 addr_high,
+			  char __user * buf, size_t len)
+{
+	return sys_lookup_dcookie(((u64)addr_high << 32) | addr_low, buf, len);
+}
+
+asmlinkage ssize_t sys32_readahead(int fd, unsigned off_lo, unsigned off_hi, size_t count)
+{
+	return sys_readahead(fd, ((u64)off_hi << 32) | off_lo, count);
+}
+
+asmlinkage long sys32_sync_file_range(int fd, unsigned off_low, unsigned off_hi,
+			   unsigned n_low, unsigned n_hi,  int flags)
+{
+	return sys_sync_file_range(fd,
+				   ((u64)off_hi << 32) | off_low,
+				   ((u64)n_hi << 32) | n_low, flags);
+}
+
+asmlinkage long sys32_fadvise64(int fd, unsigned offset_lo, unsigned offset_hi, size_t len,
+		     int advice)
+{
+	return sys_fadvise64_64(fd, ((u64)offset_hi << 32) | offset_lo,
+				len, advice);
+}
+
+asmlinkage long sys32_fallocate(int fd, int mode, unsigned offset_lo,
+				unsigned offset_hi, unsigned len_lo,
+				unsigned len_hi)
+{
+	return sys_fallocate(fd, mode, ((u64)offset_hi << 32) | offset_lo,
+			     ((u64)len_hi << 32) | len_lo);
+}
diff --git a/arch/x86/ia32/syscall32.c b/arch/x86/ia32/syscall32.c
new file mode 100644
index 000000000000..15013bac181c
--- /dev/null
+++ b/arch/x86/ia32/syscall32.c
@@ -0,0 +1,83 @@
+/* Copyright 2002,2003 Andi Kleen, SuSE Labs */
+
+/* vsyscall handling for 32bit processes. Map a stub page into it 
+   on demand because 32bit cannot reach the kernel's fixmaps */
+
+#include <linux/mm.h>
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <linux/gfp.h>
+#include <linux/init.h>
+#include <linux/stringify.h>
+#include <linux/security.h>
+#include <asm/proto.h>
+#include <asm/tlbflush.h>
+#include <asm/ia32_unistd.h>
+#include <asm/vsyscall32.h>
+
+extern unsigned char syscall32_syscall[], syscall32_syscall_end[];
+extern unsigned char syscall32_sysenter[], syscall32_sysenter_end[];
+extern int sysctl_vsyscall32;
+
+static struct page *syscall32_pages[1];
+static int use_sysenter = -1;
+
+struct linux_binprm;
+
+/* Setup a VMA at program startup for the vsyscall page */
+int syscall32_setup_pages(struct linux_binprm *bprm, int exstack)
+{
+	struct mm_struct *mm = current->mm;
+	int ret;
+
+	down_write(&mm->mmap_sem);
+	/*
+	 * MAYWRITE to allow gdb to COW and set breakpoints
+	 *
+	 * Make sure the vDSO gets into every core dump.
+	 * Dumping its contents makes post-mortem fully interpretable later
+	 * without matching up the same kernel and hardware config to see
+	 * what PC values meant.
+	 */
+	/* Could randomize here */
+	ret = install_special_mapping(mm, VSYSCALL32_BASE, PAGE_SIZE,
+				      VM_READ|VM_EXEC|
+				      VM_MAYREAD|VM_MAYWRITE|VM_MAYEXEC|
+				      VM_ALWAYSDUMP,
+				      syscall32_pages);
+	up_write(&mm->mmap_sem);
+	return ret;
+}
+
+static int __init init_syscall32(void)
+{ 
+	char *syscall32_page = (void *)get_zeroed_page(GFP_KERNEL);
+	if (!syscall32_page) 
+		panic("Cannot allocate syscall32 page"); 
+	syscall32_pages[0] = virt_to_page(syscall32_page);
+ 	if (use_sysenter > 0) {
+ 		memcpy(syscall32_page, syscall32_sysenter,
+ 		       syscall32_sysenter_end - syscall32_sysenter);
+ 	} else {
+  		memcpy(syscall32_page, syscall32_syscall,
+  		       syscall32_syscall_end - syscall32_syscall);
+  	}	
+	return 0;
+} 
+	
+__initcall(init_syscall32); 
+
+/* May not be __init: called during resume */
+void syscall32_cpu_init(void)
+{
+	if (use_sysenter < 0)
+ 		use_sysenter = (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL);
+
+	/* Load these always in case some future AMD CPU supports
+	   SYSENTER from compat mode too. */
+	checking_wrmsrl(MSR_IA32_SYSENTER_CS, (u64)__KERNEL_CS);
+	checking_wrmsrl(MSR_IA32_SYSENTER_ESP, 0ULL);
+	checking_wrmsrl(MSR_IA32_SYSENTER_EIP, (u64)ia32_sysenter_target);
+
+	wrmsrl(MSR_CSTAR, ia32_cstar_target);
+}
diff --git a/arch/x86/ia32/syscall32_syscall.S b/arch/x86/ia32/syscall32_syscall.S
new file mode 100644
index 000000000000..933f0f08b1cf
--- /dev/null
+++ b/arch/x86/ia32/syscall32_syscall.S
@@ -0,0 +1,17 @@
+/* 32bit VDSOs mapped into user space. */
+
+	.section ".init.data","aw"
+
+	.globl syscall32_syscall
+	.globl syscall32_syscall_end
+
+syscall32_syscall:
+	.incbin "arch/x86/ia32/vsyscall-syscall.so"
+syscall32_syscall_end:
+
+	.globl syscall32_sysenter
+	.globl syscall32_sysenter_end
+
+syscall32_sysenter:
+	.incbin "arch/x86/ia32/vsyscall-sysenter.so"
+syscall32_sysenter_end:
diff --git a/arch/x86/ia32/tls32.c b/arch/x86/ia32/tls32.c
new file mode 100644
index 000000000000..1cc4340de3ca
--- /dev/null
+++ b/arch/x86/ia32/tls32.c
@@ -0,0 +1,163 @@
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/user.h>
+
+#include <asm/uaccess.h>
+#include <asm/desc.h>
+#include <asm/system.h>
+#include <asm/ldt.h>
+#include <asm/processor.h>
+#include <asm/proto.h>
+
+/*
+ * sys_alloc_thread_area: get a yet unused TLS descriptor index.
+ */
+static int get_free_idx(void)
+{
+	struct thread_struct *t = &current->thread;
+	int idx;
+
+	for (idx = 0; idx < GDT_ENTRY_TLS_ENTRIES; idx++)
+		if (desc_empty((struct n_desc_struct *)(t->tls_array) + idx))
+			return idx + GDT_ENTRY_TLS_MIN;
+	return -ESRCH;
+}
+
+/*
+ * Set a given TLS descriptor:
+ * When you want addresses > 32bit use arch_prctl() 
+ */
+int do_set_thread_area(struct thread_struct *t, struct user_desc __user *u_info)
+{
+	struct user_desc info;
+	struct n_desc_struct *desc;
+	int cpu, idx;
+
+	if (copy_from_user(&info, u_info, sizeof(info)))
+		return -EFAULT;
+
+	idx = info.entry_number;
+
+	/*
+	 * index -1 means the kernel should try to find and
+	 * allocate an empty descriptor:
+	 */
+	if (idx == -1) {
+		idx = get_free_idx();
+		if (idx < 0)
+			return idx;
+		if (put_user(idx, &u_info->entry_number))
+			return -EFAULT;
+	}
+
+	if (idx < GDT_ENTRY_TLS_MIN || idx > GDT_ENTRY_TLS_MAX)
+		return -EINVAL;
+
+	desc = ((struct n_desc_struct *)t->tls_array) + idx - GDT_ENTRY_TLS_MIN;
+
+	/*
+	 * We must not get preempted while modifying the TLS.
+	 */
+	cpu = get_cpu();
+
+	if (LDT_empty(&info)) {
+		desc->a = 0;
+		desc->b = 0;
+	} else {
+		desc->a = LDT_entry_a(&info);
+		desc->b = LDT_entry_b(&info);
+	}
+	if (t == &current->thread)
+		load_TLS(t, cpu);
+
+	put_cpu();
+	return 0;
+}
+
+asmlinkage long sys32_set_thread_area(struct user_desc __user *u_info)
+{ 
+	return do_set_thread_area(&current->thread, u_info); 
+} 
+
+
+/*
+ * Get the current Thread-Local Storage area:
+ */
+
+#define GET_BASE(desc) ( \
+	(((desc)->a >> 16) & 0x0000ffff) | \
+	(((desc)->b << 16) & 0x00ff0000) | \
+	( (desc)->b        & 0xff000000)   )
+
+#define GET_LIMIT(desc) ( \
+	((desc)->a & 0x0ffff) | \
+	 ((desc)->b & 0xf0000) )
+	
+#define GET_32BIT(desc)		(((desc)->b >> 22) & 1)
+#define GET_CONTENTS(desc)	(((desc)->b >> 10) & 3)
+#define GET_WRITABLE(desc)	(((desc)->b >>  9) & 1)
+#define GET_LIMIT_PAGES(desc)	(((desc)->b >> 23) & 1)
+#define GET_PRESENT(desc)	(((desc)->b >> 15) & 1)
+#define GET_USEABLE(desc)	(((desc)->b >> 20) & 1)
+#define GET_LONGMODE(desc)	(((desc)->b >> 21) & 1)
+
+int do_get_thread_area(struct thread_struct *t, struct user_desc __user *u_info)
+{
+	struct user_desc info;
+	struct n_desc_struct *desc;
+	int idx;
+
+	if (get_user(idx, &u_info->entry_number))
+		return -EFAULT;
+	if (idx < GDT_ENTRY_TLS_MIN || idx > GDT_ENTRY_TLS_MAX)
+		return -EINVAL;
+
+	desc = ((struct n_desc_struct *)t->tls_array) + idx - GDT_ENTRY_TLS_MIN;
+
+	memset(&info, 0, sizeof(struct user_desc));
+	info.entry_number = idx;
+	info.base_addr = GET_BASE(desc);
+	info.limit = GET_LIMIT(desc);
+	info.seg_32bit = GET_32BIT(desc);
+	info.contents = GET_CONTENTS(desc);
+	info.read_exec_only = !GET_WRITABLE(desc);
+	info.limit_in_pages = GET_LIMIT_PAGES(desc);
+	info.seg_not_present = !GET_PRESENT(desc);
+	info.useable = GET_USEABLE(desc);
+	info.lm = GET_LONGMODE(desc);
+
+	if (copy_to_user(u_info, &info, sizeof(info)))
+		return -EFAULT;
+	return 0;
+}
+
+asmlinkage long sys32_get_thread_area(struct user_desc __user *u_info)
+{
+	return do_get_thread_area(&current->thread, u_info);
+} 
+
+
+int ia32_child_tls(struct task_struct *p, struct pt_regs *childregs)
+{
+	struct n_desc_struct *desc;
+	struct user_desc info;
+	struct user_desc __user *cp;
+	int idx;
+	
+	cp = (void __user *)childregs->rsi;
+	if (copy_from_user(&info, cp, sizeof(info)))
+		return -EFAULT;
+	if (LDT_empty(&info))
+		return -EINVAL;
+	
+	idx = info.entry_number;
+	if (idx < GDT_ENTRY_TLS_MIN || idx > GDT_ENTRY_TLS_MAX)
+		return -EINVAL;
+	
+	desc = (struct n_desc_struct *)(p->thread.tls_array) + idx - GDT_ENTRY_TLS_MIN;
+	desc->a = LDT_entry_a(&info);
+	desc->b = LDT_entry_b(&info);
+
+	return 0;
+}
diff --git a/arch/x86/ia32/vsyscall-sigreturn.S b/arch/x86/ia32/vsyscall-sigreturn.S
new file mode 100644
index 000000000000..b383be00baec
--- /dev/null
+++ b/arch/x86/ia32/vsyscall-sigreturn.S
@@ -0,0 +1,143 @@
+/*
+ * Common code for the sigreturn entry points on the vsyscall page.
+ * This code uses SYSCALL_ENTER_KERNEL (either syscall or int $0x80)
+ * to enter the kernel.
+ * This file is #include'd by vsyscall-*.S to define them after the
+ * vsyscall entry point.  The addresses we get for these entry points
+ * by doing ".balign 32" must match in both versions of the page.
+ */
+
+	.code32
+	.section .text.sigreturn,"ax"
+	.balign 32
+	.globl __kernel_sigreturn
+	.type __kernel_sigreturn,@function
+__kernel_sigreturn:
+.LSTART_sigreturn:
+	popl %eax
+	movl $__NR_ia32_sigreturn, %eax
+	SYSCALL_ENTER_KERNEL
+.LEND_sigreturn:
+	.size __kernel_sigreturn,.-.LSTART_sigreturn
+
+	.section .text.rtsigreturn,"ax"
+	.balign 32
+	.globl __kernel_rt_sigreturn
+	.type __kernel_rt_sigreturn,@function
+__kernel_rt_sigreturn:
+.LSTART_rt_sigreturn:
+	movl $__NR_ia32_rt_sigreturn, %eax
+	SYSCALL_ENTER_KERNEL
+.LEND_rt_sigreturn:
+	.size __kernel_rt_sigreturn,.-.LSTART_rt_sigreturn
+
+	.section .eh_frame,"a",@progbits
+.LSTARTFRAMES:
+        .long .LENDCIES-.LSTARTCIES
+.LSTARTCIES:
+	.long 0			/* CIE ID */
+	.byte 1			/* Version number */
+	.string "zRS"		/* NUL-terminated augmentation string */
+	.uleb128 1		/* Code alignment factor */
+	.sleb128 -4		/* Data alignment factor */
+	.byte 8			/* Return address register column */
+	.uleb128 1		/* Augmentation value length */
+	.byte 0x1b		/* DW_EH_PE_pcrel|DW_EH_PE_sdata4. */
+	.byte 0x0c		/* DW_CFA_def_cfa */
+	.uleb128 4
+	.uleb128 4
+	.byte 0x88		/* DW_CFA_offset, column 0x8 */
+	.uleb128 1
+	.align 4
+.LENDCIES:
+
+	.long .LENDFDE2-.LSTARTFDE2	/* Length FDE */
+.LSTARTFDE2:
+	.long .LSTARTFDE2-.LSTARTFRAMES	/* CIE pointer */
+	/* HACK: The dwarf2 unwind routines will subtract 1 from the
+	   return address to get an address in the middle of the
+	   presumed call instruction.  Since we didn't get here via
+	   a call, we need to include the nop before the real start
+	   to make up for it.  */
+	.long .LSTART_sigreturn-1-.	/* PC-relative start address */
+	.long .LEND_sigreturn-.LSTART_sigreturn+1
+	.uleb128 0			/* Augmentation length */
+	/* What follows are the instructions for the table generation.
+	   We record the locations of each register saved.  This is
+	   complicated by the fact that the "CFA" is always assumed to
+	   be the value of the stack pointer in the caller.  This means
+	   that we must define the CFA of this body of code to be the
+	   saved value of the stack pointer in the sigcontext.  Which
+	   also means that there is no fixed relation to the other 
+	   saved registers, which means that we must use DW_CFA_expression
+	   to compute their addresses.  It also means that when we 
+	   adjust the stack with the popl, we have to do it all over again.  */
+
+#define do_cfa_expr(offset)						\
+	.byte 0x0f;			/* DW_CFA_def_cfa_expression */	\
+	.uleb128 1f-0f;			/*   length */			\
+0:	.byte 0x74;			/*     DW_OP_breg4 */		\
+	.sleb128 offset;		/*      offset */		\
+	.byte 0x06;			/*     DW_OP_deref */		\
+1:
+
+#define do_expr(regno, offset)						\
+	.byte 0x10;			/* DW_CFA_expression */		\
+	.uleb128 regno;			/*   regno */			\
+	.uleb128 1f-0f;			/*   length */			\
+0:	.byte 0x74;			/*     DW_OP_breg4 */		\
+	.sleb128 offset;		/*       offset */		\
+1:
+
+	do_cfa_expr(IA32_SIGCONTEXT_esp+4)
+	do_expr(0, IA32_SIGCONTEXT_eax+4)
+	do_expr(1, IA32_SIGCONTEXT_ecx+4)
+	do_expr(2, IA32_SIGCONTEXT_edx+4)
+	do_expr(3, IA32_SIGCONTEXT_ebx+4)
+	do_expr(5, IA32_SIGCONTEXT_ebp+4)
+	do_expr(6, IA32_SIGCONTEXT_esi+4)
+	do_expr(7, IA32_SIGCONTEXT_edi+4)
+	do_expr(8, IA32_SIGCONTEXT_eip+4)
+
+	.byte 0x42	/* DW_CFA_advance_loc 2 -- nop; popl eax. */
+
+	do_cfa_expr(IA32_SIGCONTEXT_esp)
+	do_expr(0, IA32_SIGCONTEXT_eax)
+	do_expr(1, IA32_SIGCONTEXT_ecx)
+	do_expr(2, IA32_SIGCONTEXT_edx)
+	do_expr(3, IA32_SIGCONTEXT_ebx)
+	do_expr(5, IA32_SIGCONTEXT_ebp)
+	do_expr(6, IA32_SIGCONTEXT_esi)
+	do_expr(7, IA32_SIGCONTEXT_edi)
+	do_expr(8, IA32_SIGCONTEXT_eip)
+
+	.align 4
+.LENDFDE2:
+
+	.long .LENDFDE3-.LSTARTFDE3	/* Length FDE */
+.LSTARTFDE3:
+	.long .LSTARTFDE3-.LSTARTFRAMES	/* CIE pointer */
+	/* HACK: See above wrt unwind library assumptions.  */
+	.long .LSTART_rt_sigreturn-1-.	/* PC-relative start address */
+	.long .LEND_rt_sigreturn-.LSTART_rt_sigreturn+1
+	.uleb128 0			/* Augmentation */
+	/* What follows are the instructions for the table generation.
+	   We record the locations of each register saved.  This is
+	   slightly less complicated than the above, since we don't
+	   modify the stack pointer in the process.  */
+
+	do_cfa_expr(IA32_RT_SIGFRAME_sigcontext-4 + IA32_SIGCONTEXT_esp)
+	do_expr(0, IA32_RT_SIGFRAME_sigcontext-4 + IA32_SIGCONTEXT_eax)
+	do_expr(1, IA32_RT_SIGFRAME_sigcontext-4 + IA32_SIGCONTEXT_ecx)
+	do_expr(2, IA32_RT_SIGFRAME_sigcontext-4 + IA32_SIGCONTEXT_edx)
+	do_expr(3, IA32_RT_SIGFRAME_sigcontext-4 + IA32_SIGCONTEXT_ebx)
+	do_expr(5, IA32_RT_SIGFRAME_sigcontext-4 + IA32_SIGCONTEXT_ebp)
+	do_expr(6, IA32_RT_SIGFRAME_sigcontext-4 + IA32_SIGCONTEXT_esi)
+	do_expr(7, IA32_RT_SIGFRAME_sigcontext-4 + IA32_SIGCONTEXT_edi)
+	do_expr(8, IA32_RT_SIGFRAME_sigcontext-4 + IA32_SIGCONTEXT_eip)
+
+	.align 4
+.LENDFDE3:
+
+#include "../../x86/kernel/vsyscall-note_32.S"
+
diff --git a/arch/x86/ia32/vsyscall-syscall.S b/arch/x86/ia32/vsyscall-syscall.S
new file mode 100644
index 000000000000..cf9ef678de3e
--- /dev/null
+++ b/arch/x86/ia32/vsyscall-syscall.S
@@ -0,0 +1,69 @@
+/*
+ * Code for the vsyscall page.  This version uses the syscall instruction.
+ */
+
+#include <asm/ia32_unistd.h>
+#include <asm/asm-offsets.h>
+#include <asm/segment.h>
+
+	.code32
+	.text
+	.section .text.vsyscall,"ax"
+	.globl __kernel_vsyscall
+	.type __kernel_vsyscall,@function
+__kernel_vsyscall:
+.LSTART_vsyscall:
+	push	%ebp
+.Lpush_ebp:
+	movl	%ecx, %ebp
+	syscall
+	movl	$__USER32_DS, %ecx
+	movl	%ecx, %ss
+	movl	%ebp, %ecx
+	popl	%ebp
+.Lpop_ebp:
+	ret
+.LEND_vsyscall:
+	.size __kernel_vsyscall,.-.LSTART_vsyscall
+
+	.section .eh_frame,"a",@progbits
+.LSTARTFRAME:
+	.long .LENDCIE-.LSTARTCIE
+.LSTARTCIE:
+	.long 0			/* CIE ID */
+	.byte 1			/* Version number */
+	.string "zR"		/* NUL-terminated augmentation string */
+	.uleb128 1		/* Code alignment factor */
+	.sleb128 -4		/* Data alignment factor */
+	.byte 8			/* Return address register column */
+	.uleb128 1		/* Augmentation value length */
+	.byte 0x1b		/* DW_EH_PE_pcrel|DW_EH_PE_sdata4. */
+	.byte 0x0c		/* DW_CFA_def_cfa */
+	.uleb128 4
+	.uleb128 4
+	.byte 0x88		/* DW_CFA_offset, column 0x8 */
+	.uleb128 1
+	.align 4
+.LENDCIE:
+
+	.long .LENDFDE1-.LSTARTFDE1	/* Length FDE */
+.LSTARTFDE1:
+	.long .LSTARTFDE1-.LSTARTFRAME	/* CIE pointer */
+	.long .LSTART_vsyscall-.	/* PC-relative start address */
+	.long .LEND_vsyscall-.LSTART_vsyscall
+	.uleb128 0			/* Augmentation length */
+	/* What follows are the instructions for the table generation.
+	   We have to record all changes of the stack pointer.  */
+	.byte 0x40 + .Lpush_ebp-.LSTART_vsyscall /* DW_CFA_advance_loc */
+	.byte 0x0e		/* DW_CFA_def_cfa_offset */
+	.uleb128 8
+	.byte 0x85, 0x02	/* DW_CFA_offset %ebp -8 */
+	.byte 0x40 + .Lpop_ebp-.Lpush_ebp /* DW_CFA_advance_loc */
+	.byte 0xc5		/* DW_CFA_restore %ebp */
+	.byte 0x0e		/* DW_CFA_def_cfa_offset */
+	.uleb128 4
+	.align 4
+.LENDFDE1:
+
+#define SYSCALL_ENTER_KERNEL	syscall
+#include "vsyscall-sigreturn.S"
diff --git a/arch/x86/ia32/vsyscall-sysenter.S b/arch/x86/ia32/vsyscall-sysenter.S
new file mode 100644
index 000000000000..ae056e553d13
--- /dev/null
+++ b/arch/x86/ia32/vsyscall-sysenter.S
@@ -0,0 +1,95 @@
+/*
+ * Code for the vsyscall page.  This version uses the sysenter instruction.
+ */
+
+#include <asm/ia32_unistd.h>
+#include <asm/asm-offsets.h>
+
+	.code32
+	.text
+	.section .text.vsyscall,"ax"
+	.globl __kernel_vsyscall
+	.type __kernel_vsyscall,@function
+__kernel_vsyscall:
+.LSTART_vsyscall:
+	push	%ecx
+.Lpush_ecx:
+	push	%edx
+.Lpush_edx:
+	push	%ebp
+.Lenter_kernel:
+	movl	%esp,%ebp
+	sysenter
+	.space 7,0x90
+	jmp	.Lenter_kernel
+	/* 16: System call normal return point is here! */
+	pop	%ebp
+.Lpop_ebp:
+	pop	%edx
+.Lpop_edx:
+	pop	%ecx
+.Lpop_ecx:
+	ret
+.LEND_vsyscall:
+	.size __kernel_vsyscall,.-.LSTART_vsyscall
+
+	.section .eh_frame,"a",@progbits
+.LSTARTFRAME:
+	.long .LENDCIE-.LSTARTCIE
+.LSTARTCIE:
+	.long 0			/* CIE ID */
+	.byte 1			/* Version number */
+	.string "zR"		/* NUL-terminated augmentation string */
+	.uleb128 1		/* Code alignment factor */
+	.sleb128 -4		/* Data alignment factor */
+	.byte 8			/* Return address register column */
+	.uleb128 1		/* Augmentation value length */
+	.byte 0x1b		/* DW_EH_PE_pcrel|DW_EH_PE_sdata4. */
+	.byte 0x0c		/* DW_CFA_def_cfa */
+	.uleb128 4
+	.uleb128 4
+	.byte 0x88		/* DW_CFA_offset, column 0x8 */
+	.uleb128 1
+	.align 4
+.LENDCIE:
+
+	.long .LENDFDE1-.LSTARTFDE1	/* Length FDE */
+.LSTARTFDE1:
+	.long .LSTARTFDE1-.LSTARTFRAME	/* CIE pointer */
+	.long .LSTART_vsyscall-.	/* PC-relative start address */
+	.long .LEND_vsyscall-.LSTART_vsyscall
+	.uleb128 0			/* Augmentation length */
+	/* What follows are the instructions for the table generation.
+	   We have to record all changes of the stack pointer.  */
+	.byte 0x04		/* DW_CFA_advance_loc4 */
+	.long .Lpush_ecx-.LSTART_vsyscall
+	.byte 0x0e		/* DW_CFA_def_cfa_offset */
+	.byte 0x08		/* RA at offset 8 now */
+	.byte 0x04		/* DW_CFA_advance_loc4 */
+	.long .Lpush_edx-.Lpush_ecx
+	.byte 0x0e		/* DW_CFA_def_cfa_offset */
+	.byte 0x0c		/* RA at offset 12 now */
+	.byte 0x04		/* DW_CFA_advance_loc4 */
+	.long .Lenter_kernel-.Lpush_edx
+	.byte 0x0e		/* DW_CFA_def_cfa_offset */
+	.byte 0x10		/* RA at offset 16 now */
+	.byte 0x85, 0x04	/* DW_CFA_offset %ebp -16 */
+	/* Finally the epilogue.  */
+	.byte 0x04		/* DW_CFA_advance_loc4 */
+	.long .Lpop_ebp-.Lenter_kernel
+	.byte 0x0e		/* DW_CFA_def_cfa_offset */
+	.byte 0x12		/* RA at offset 12 now */
+	.byte 0xc5		/* DW_CFA_restore %ebp */
+	.byte 0x04		/* DW_CFA_advance_loc4 */
+	.long .Lpop_edx-.Lpop_ebp
+	.byte 0x0e		/* DW_CFA_def_cfa_offset */
+	.byte 0x08		/* RA at offset 8 now */
+	.byte 0x04		/* DW_CFA_advance_loc4 */
+	.long .Lpop_ecx-.Lpop_edx
+	.byte 0x0e		/* DW_CFA_def_cfa_offset */
+	.byte 0x04		/* RA at offset 4 now */
+	.align 4
+.LENDFDE1:
+
+#define SYSCALL_ENTER_KERNEL	int $0x80
+#include "vsyscall-sigreturn.S"
diff --git a/arch/x86/ia32/vsyscall.lds b/arch/x86/ia32/vsyscall.lds
new file mode 100644
index 000000000000..1dc86ff5bcb9
--- /dev/null
+++ b/arch/x86/ia32/vsyscall.lds
@@ -0,0 +1,80 @@
+/*
+ * Linker script for vsyscall DSO.  The vsyscall page is an ELF shared
+ * object prelinked to its virtual address. This script controls its layout.
+ */
+
+/* This must match <asm/fixmap.h>.  */
+VSYSCALL_BASE = 0xffffe000;
+
+SECTIONS
+{
+  . = VSYSCALL_BASE + SIZEOF_HEADERS;
+
+  .hash           : { *(.hash) }		:text
+  .gnu.hash       : { *(.gnu.hash) }
+  .dynsym         : { *(.dynsym) }
+  .dynstr         : { *(.dynstr) }
+  .gnu.version    : { *(.gnu.version) }
+  .gnu.version_d  : { *(.gnu.version_d) }
+  .gnu.version_r  : { *(.gnu.version_r) }
+
+  /* This linker script is used both with -r and with -shared.
+     For the layouts to match, we need to skip more than enough
+     space for the dynamic symbol table et al.  If this amount
+     is insufficient, ld -shared will barf.  Just increase it here.  */
+  . = VSYSCALL_BASE + 0x400;
+  
+  .text.vsyscall   : { *(.text.vsyscall) } 	:text =0x90909090
+
+  /* This is an 32bit object and we cannot easily get the offsets
+     into the 64bit kernel. Just hardcode them here. This assumes
+     that all the stubs don't need more than 0x100 bytes. */
+  . = VSYSCALL_BASE + 0x500;
+
+  .text.sigreturn  : { *(.text.sigreturn) }	:text =0x90909090
+
+  . = VSYSCALL_BASE + 0x600;
+
+  .text.rtsigreturn : { *(.text.rtsigreturn) }   :text =0x90909090
+	
+  .note		  : { *(.note.*) }		:text :note
+  .eh_frame_hdr   : { *(.eh_frame_hdr) }	:text :eh_frame_hdr
+  .eh_frame       : { KEEP (*(.eh_frame)) }	:text
+  .dynamic        : { *(.dynamic) }		:text :dynamic
+  .useless        : {
+  	*(.got.plt) *(.got)
+	*(.data .data.* .gnu.linkonce.d.*)
+	*(.dynbss)
+	*(.bss .bss.* .gnu.linkonce.b.*)
+  }						:text
+}
+
+/*
+ * We must supply the ELF program headers explicitly to get just one
+ * PT_LOAD segment, and set the flags explicitly to make segments read-only.
+ */
+PHDRS
+{
+  text PT_LOAD FILEHDR PHDRS FLAGS(5); /* PF_R|PF_X */
+  dynamic PT_DYNAMIC FLAGS(4); /* PF_R */
+  note PT_NOTE FLAGS(4); /* PF_R */
+  eh_frame_hdr 0x6474e550; /* PT_GNU_EH_FRAME, but ld doesn't match the name */
+}
+
+/*
+ * This controls what symbols we export from the DSO.
+ */
+VERSION
+{
+  LINUX_2.5 {
+    global:
+    	__kernel_vsyscall;
+    	__kernel_sigreturn;
+    	__kernel_rt_sigreturn;
+
+    local: *;
+  };
+}
+
+/* The ELF entry point can be used to set the AT_SYSINFO value.  */
+ENTRY(__kernel_vsyscall);