Linux-2.6.12-rc2v2.6.12-rc2

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

Let it rip!

1 files changed, 2747 insertions, 0 deletions

diff --git a/arch/ia64/ia32/sys_ia32.c b/arch/ia64/ia32/sys_ia32.c
new file mode 100644
index 00000000000..247a21c64ae
--- /dev/null
+++ b/arch/ia64/ia32/sys_ia32.c
@@ -0,0 +1,2747 @@
+/*
+ * sys_ia32.c: Conversion between 32bit and 64bit native syscalls. Derived from sys_sparc32.c.
+ *
+ * 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) 2000-2003, 2005 Hewlett-Packard Co
+ *	David Mosberger-Tang <davidm@hpl.hp.com>
+ * Copyright (C) 2004		Gordon Jin <gordon.jin@intel.com>
+ *
+ * These routines maintain argument size conversion between 32bit and 64bit
+ * environment.
+ */
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/syscalls.h>
+#include <linux/sysctl.h>
+#include <linux/sched.h>
+#include <linux/fs.h>
+#include <linux/file.h>
+#include <linux/signal.h>
+#include <linux/resource.h>
+#include <linux/times.h>
+#include <linux/utsname.h>
+#include <linux/timex.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/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/eventpoll.h>
+#include <linux/personality.h>
+#include <linux/ptrace.h>
+#include <linux/stat.h>
+#include <linux/ipc.h>
+#include <linux/compat.h>
+#include <linux/vfs.h>
+#include <linux/mman.h>
+
+#include <asm/intrinsics.h>
+#include <asm/semaphore.h>
+#include <asm/types.h>
+#include <asm/uaccess.h>
+#include <asm/unistd.h>
+
+#include "ia32priv.h"
+
+#include <net/scm.h>
+#include <net/sock.h>
+
+#define DEBUG	0
+
+#if DEBUG
+# define DBG(fmt...)	printk(KERN_DEBUG fmt)
+#else
+# define DBG(fmt...)
+#endif
+
+#define ROUND_UP(x,a)	((__typeof__(x))(((unsigned long)(x) + ((a) - 1)) & ~((a) - 1)))
+
+#define OFFSET4K(a)		((a) & 0xfff)
+#define PAGE_START(addr)	((addr) & PAGE_MASK)
+#define MINSIGSTKSZ_IA32	2048
+
+#define high2lowuid(uid) ((uid) > 65535 ? 65534 : (uid))
+#define high2lowgid(gid) ((gid) > 65535 ? 65534 : (gid))
+
+/*
+ * Anything that modifies or inspects ia32 user virtual memory must hold this semaphore
+ * while doing so.
+ */
+/* XXX make per-mm: */
+static DECLARE_MUTEX(ia32_mmap_sem);
+
+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;
+	unsigned long old_map_base, old_task_size, tssd;
+
+	filename = getname(name);
+	error = PTR_ERR(filename);
+	if (IS_ERR(filename))
+		return error;
+
+	old_map_base  = current->thread.map_base;
+	old_task_size = current->thread.task_size;
+	tssd = ia64_get_kr(IA64_KR_TSSD);
+
+	/* we may be exec'ing a 64-bit process: reset map base, task-size, and io-base: */
+	current->thread.map_base  = DEFAULT_MAP_BASE;
+	current->thread.task_size = DEFAULT_TASK_SIZE;
+	ia64_set_kr(IA64_KR_IO_BASE, current->thread.old_iob);
+	ia64_set_kr(IA64_KR_TSSD, current->thread.old_k1);
+
+	error = compat_do_execve(filename, argv, envp, regs);
+	putname(filename);
+
+	if (error < 0) {
+		/* oops, execve failed, switch back to old values... */
+		ia64_set_kr(IA64_KR_IO_BASE, IA32_IOBASE);
+		ia64_set_kr(IA64_KR_TSSD, tssd);
+		current->thread.map_base  = old_map_base;
+		current->thread.task_size = old_task_size;
+	}
+
+	return error;
+}
+
+int cp_compat_stat(struct kstat *stat, struct compat_stat __user *ubuf)
+{
+	int err;
+
+	if ((u64) stat->size > MAX_NON_LFS ||
+	    !old_valid_dev(stat->dev) ||
+	    !old_valid_dev(stat->rdev))
+		return -EOVERFLOW;
+
+	if (clear_user(ubuf, sizeof(*ubuf)))
+		return -EFAULT;
+
+	err  = __put_user(old_encode_dev(stat->dev), &ubuf->st_dev);
+	err |= __put_user(stat->ino, &ubuf->st_ino);
+	err |= __put_user(stat->mode, &ubuf->st_mode);
+	err |= __put_user(stat->nlink, &ubuf->st_nlink);
+	err |= __put_user(high2lowuid(stat->uid), &ubuf->st_uid);
+	err |= __put_user(high2lowgid(stat->gid), &ubuf->st_gid);
+	err |= __put_user(old_encode_dev(stat->rdev), &ubuf->st_rdev);
+	err |= __put_user(stat->size, &ubuf->st_size);
+	err |= __put_user(stat->atime.tv_sec, &ubuf->st_atime);
+	err |= __put_user(stat->atime.tv_nsec, &ubuf->st_atime_nsec);
+	err |= __put_user(stat->mtime.tv_sec, &ubuf->st_mtime);
+	err |= __put_user(stat->mtime.tv_nsec, &ubuf->st_mtime_nsec);
+	err |= __put_user(stat->ctime.tv_sec, &ubuf->st_ctime);
+	err |= __put_user(stat->ctime.tv_nsec, &ubuf->st_ctime_nsec);
+	err |= __put_user(stat->blksize, &ubuf->st_blksize);
+	err |= __put_user(stat->blocks, &ubuf->st_blocks);
+	return err;
+}
+
+#if PAGE_SHIFT > IA32_PAGE_SHIFT
+
+
+static int
+get_page_prot (struct vm_area_struct *vma, unsigned long addr)
+{
+	int prot = 0;
+
+	if (!vma || vma->vm_start > addr)
+		return 0;
+
+	if (vma->vm_flags & VM_READ)
+		prot |= PROT_READ;
+	if (vma->vm_flags & VM_WRITE)
+		prot |= PROT_WRITE;
+	if (vma->vm_flags & VM_EXEC)
+		prot |= PROT_EXEC;
+	return prot;
+}
+
+/*
+ * Map a subpage by creating an anonymous page that contains the union of the old page and
+ * the subpage.
+ */
+static unsigned long
+mmap_subpage (struct file *file, unsigned long start, unsigned long end, int prot, int flags,
+	      loff_t off)
+{
+	void *page = NULL;
+	struct inode *inode;
+	unsigned long ret = 0;
+	struct vm_area_struct *vma = find_vma(current->mm, start);
+	int old_prot = get_page_prot(vma, start);
+
+	DBG("mmap_subpage(file=%p,start=0x%lx,end=0x%lx,prot=%x,flags=%x,off=0x%llx)\n",
+	    file, start, end, prot, flags, off);
+
+
+	/* Optimize the case where the old mmap and the new mmap are both anonymous */
+	if ((old_prot & PROT_WRITE) && (flags & MAP_ANONYMOUS) && !vma->vm_file) {
+		if (clear_user((void __user *) start, end - start)) {
+			ret = -EFAULT;
+			goto out;
+		}
+		goto skip_mmap;
+	}
+
+	page = (void *) get_zeroed_page(GFP_KERNEL);
+	if (!page)
+		return -ENOMEM;
+
+	if (old_prot)
+		copy_from_user(page, (void __user *) PAGE_START(start), PAGE_SIZE);
+
+	down_write(&current->mm->mmap_sem);
+	{
+		ret = do_mmap(NULL, PAGE_START(start), PAGE_SIZE, prot | PROT_WRITE,
+			      flags | MAP_FIXED | MAP_ANONYMOUS, 0);
+	}
+	up_write(&current->mm->mmap_sem);
+
+	if (IS_ERR((void *) ret))
+		goto out;
+
+	if (old_prot) {
+		/* copy back the old page contents.  */
+		if (offset_in_page(start))
+			copy_to_user((void __user *) PAGE_START(start), page,
+				     offset_in_page(start));
+		if (offset_in_page(end))
+			copy_to_user((void __user *) end, page + offset_in_page(end),
+				     PAGE_SIZE - offset_in_page(end));
+	}
+
+	if (!(flags & MAP_ANONYMOUS)) {
+		/* read the file contents */
+		inode = file->f_dentry->d_inode;
+		if (!inode->i_fop || !file->f_op->read
+		    || ((*file->f_op->read)(file, (char __user *) start, end - start, &off) < 0))
+		{
+			ret = -EINVAL;
+			goto out;
+		}
+	}
+
+ skip_mmap:
+	if (!(prot & PROT_WRITE))
+		ret = sys_mprotect(PAGE_START(start), PAGE_SIZE, prot | old_prot);
+  out:
+	if (page)
+		free_page((unsigned long) page);
+	return ret;
+}
+
+/* SLAB cache for partial_page structures */
+kmem_cache_t *partial_page_cachep;
+
+/*
+ * init partial_page_list.
+ * return 0 means kmalloc fail.
+ */
+struct partial_page_list*
+ia32_init_pp_list(void)
+{
+	struct partial_page_list *p;
+
+	if ((p = kmalloc(sizeof(*p), GFP_KERNEL)) == NULL)
+		return p;
+	p->pp_head = NULL;
+	p->ppl_rb = RB_ROOT;
+	p->pp_hint = NULL;
+	atomic_set(&p->pp_count, 1);
+	return p;
+}
+
+/*
+ * Search for the partial page with @start in partial page list @ppl.
+ * If finds the partial page, return the found partial page.
+ * Else, return 0 and provide @pprev, @rb_link, @rb_parent to
+ * be used by later __ia32_insert_pp().
+ */
+static struct partial_page *
+__ia32_find_pp(struct partial_page_list *ppl, unsigned int start,
+	struct partial_page **pprev, struct rb_node ***rb_link,
+	struct rb_node **rb_parent)
+{
+	struct partial_page *pp;
+	struct rb_node **__rb_link, *__rb_parent, *rb_prev;
+
+	pp = ppl->pp_hint;
+	if (pp && pp->base == start)
+		return pp;
+
+	__rb_link = &ppl->ppl_rb.rb_node;
+	rb_prev = __rb_parent = NULL;
+
+	while (*__rb_link) {
+		__rb_parent = *__rb_link;
+		pp = rb_entry(__rb_parent, struct partial_page, pp_rb);
+
+		if (pp->base == start) {
+			ppl->pp_hint = pp;
+			return pp;
+		} else if (pp->base < start) {
+			rb_prev = __rb_parent;
+			__rb_link = &__rb_parent->rb_right;
+		} else {
+			__rb_link = &__rb_parent->rb_left;
+		}
+	}
+
+	*rb_link = __rb_link;
+	*rb_parent = __rb_parent;
+	*pprev = NULL;
+	if (rb_prev)
+		*pprev = rb_entry(rb_prev, struct partial_page, pp_rb);
+	return NULL;
+}
+
+/*
+ * insert @pp into @ppl.
+ */
+static void
+__ia32_insert_pp(struct partial_page_list *ppl, struct partial_page *pp,
+	 struct partial_page *prev, struct rb_node **rb_link,
+	struct rb_node *rb_parent)
+{
+	/* link list */
+	if (prev) {
+		pp->next = prev->next;
+		prev->next = pp;
+	} else {
+		ppl->pp_head = pp;
+		if (rb_parent)
+			pp->next = rb_entry(rb_parent,
+				struct partial_page, pp_rb);
+		else
+			pp->next = NULL;
+	}
+
+	/* link rb */
+	rb_link_node(&pp->pp_rb, rb_parent, rb_link);
+	rb_insert_color(&pp->pp_rb, &ppl->ppl_rb);
+
+	ppl->pp_hint = pp;
+}
+
+/*
+ * delete @pp from partial page list @ppl.
+ */
+static void
+__ia32_delete_pp(struct partial_page_list *ppl, struct partial_page *pp,
+	struct partial_page *prev)
+{
+	if (prev) {
+		prev->next = pp->next;
+		if (ppl->pp_hint == pp)
+			ppl->pp_hint = prev;
+	} else {
+		ppl->pp_head = pp->next;
+		if (ppl->pp_hint == pp)
+			ppl->pp_hint = pp->next;
+	}
+	rb_erase(&pp->pp_rb, &ppl->ppl_rb);
+	kmem_cache_free(partial_page_cachep, pp);
+}
+
+static struct partial_page *
+__pp_prev(struct partial_page *pp)
+{
+	struct rb_node *prev = rb_prev(&pp->pp_rb);
+	if (prev)
+		return rb_entry(prev, struct partial_page, pp_rb);
+	else
+		return NULL;
+}
+
+/*
+ * Delete partial pages with address between @start and @end.
+ * @start and @end are page aligned.
+ */
+static void
+__ia32_delete_pp_range(unsigned int start, unsigned int end)
+{
+	struct partial_page *pp, *prev;
+	struct rb_node **rb_link, *rb_parent;
+
+	if (start >= end)
+		return;
+
+	pp = __ia32_find_pp(current->thread.ppl, start, &prev,
+					&rb_link, &rb_parent);
+	if (pp)
+		prev = __pp_prev(pp);
+	else {
+		if (prev)
+			pp = prev->next;
+		else
+			pp = current->thread.ppl->pp_head;
+	}
+
+	while (pp && pp->base < end) {
+		struct partial_page *tmp = pp->next;
+		__ia32_delete_pp(current->thread.ppl, pp, prev);
+		pp = tmp;
+	}
+}
+
+/*
+ * Set the range between @start and @end in bitmap.
+ * @start and @end should be IA32 page aligned and in the same IA64 page.
+ */
+static int
+__ia32_set_pp(unsigned int start, unsigned int end, int flags)
+{
+	struct partial_page *pp, *prev;
+	struct rb_node ** rb_link, *rb_parent;
+	unsigned int pstart, start_bit, end_bit, i;
+
+	pstart = PAGE_START(start);
+	start_bit = (start % PAGE_SIZE) / IA32_PAGE_SIZE;
+	end_bit = (end % PAGE_SIZE) / IA32_PAGE_SIZE;
+	if (end_bit == 0)
+		end_bit = PAGE_SIZE / IA32_PAGE_SIZE;
+	pp = __ia32_find_pp(current->thread.ppl, pstart, &prev,
+					&rb_link, &rb_parent);
+	if (pp) {
+		for (i = start_bit; i < end_bit; i++)
+			set_bit(i, &pp->bitmap);
+		/*
+		 * Check: if this partial page has been set to a full page,
+		 * then delete it.
+		 */
+		if (find_first_zero_bit(&pp->bitmap, sizeof(pp->bitmap)*8) >=
+				PAGE_SIZE/IA32_PAGE_SIZE) {
+			__ia32_delete_pp(current->thread.ppl, pp, __pp_prev(pp));
+		}
+		return 0;
+	}
+
+	/*
+	 * MAP_FIXED may lead to overlapping mmap.
+	 * In this case, the requested mmap area may already mmaped as a full
+	 * page. So check vma before adding a new partial page.
+	 */
+	if (flags & MAP_FIXED) {
+		struct vm_area_struct *vma = find_vma(current->mm, pstart);
+		if (vma && vma->vm_start <= pstart)
+			return 0;
+	}
+
+	/* new a partial_page */
+	pp = kmem_cache_alloc(partial_page_cachep, GFP_KERNEL);
+	if (!pp)
+		return -ENOMEM;
+	pp->base = pstart;
+	pp->bitmap = 0;
+	for (i=start_bit; i<end_bit; i++)
+		set_bit(i, &(pp->bitmap));
+	pp->next = NULL;
+	__ia32_insert_pp(current->thread.ppl, pp, prev, rb_link, rb_parent);
+	return 0;
+}
+
+/*
+ * @start and @end should be IA32 page aligned, but don't need to be in the
+ * same IA64 page. Split @start and @end to make sure they're in the same IA64
+ * page, then call __ia32_set_pp().
+ */
+static void
+ia32_set_pp(unsigned int start, unsigned int end, int flags)
+{
+	down_write(&current->mm->mmap_sem);
+	if (flags & MAP_FIXED) {
+		/*
+		 * MAP_FIXED may lead to overlapping mmap. When this happens,
+		 * a series of complete IA64 pages results in deletion of
+		 * old partial pages in that range.
+		 */
+		__ia32_delete_pp_range(PAGE_ALIGN(start), PAGE_START(end));
+	}
+
+	if (end < PAGE_ALIGN(start)) {
+		__ia32_set_pp(start, end, flags);
+	} else {
+		if (offset_in_page(start))
+			__ia32_set_pp(start, PAGE_ALIGN(start), flags);
+		if (offset_in_page(end))
+			__ia32_set_pp(PAGE_START(end), end, flags);
+	}
+	up_write(&current->mm->mmap_sem);
+}
+
+/*
+ * Unset the range between @start and @end in bitmap.
+ * @start and @end should be IA32 page aligned and in the same IA64 page.
+ * After doing that, if the bitmap is 0, then free the page and return 1,
+ * 	else return 0;
+ * If not find the partial page in the list, then
+ * 	If the vma exists, then the full page is set to a partial page;
+ *	Else return -ENOMEM.
+ */
+static int
+__ia32_unset_pp(unsigned int start, unsigned int end)
+{
+	struct partial_page *pp, *prev;
+	struct rb_node ** rb_link, *rb_parent;
+	unsigned int pstart, start_bit, end_bit, i;
+	struct vm_area_struct *vma;
+
+	pstart = PAGE_START(start);
+	start_bit = (start % PAGE_SIZE) / IA32_PAGE_SIZE;
+	end_bit = (end % PAGE_SIZE) / IA32_PAGE_SIZE;
+	if (end_bit == 0)
+		end_bit = PAGE_SIZE / IA32_PAGE_SIZE;
+
+	pp = __ia32_find_pp(current->thread.ppl, pstart, &prev,
+					&rb_link, &rb_parent);
+	if (pp) {
+		for (i = start_bit; i < end_bit; i++)
+			clear_bit(i, &pp->bitmap);
+		if (pp->bitmap == 0) {
+			__ia32_delete_pp(current->thread.ppl, pp, __pp_prev(pp));
+			return 1;
+		}
+		return 0;
+	}
+
+	vma = find_vma(current->mm, pstart);
+	if (!vma || vma->vm_start > pstart) {
+		return -ENOMEM;
+	}
+
+	/* new a partial_page */
+	pp = kmem_cache_alloc(partial_page_cachep, GFP_KERNEL);
+	if (!pp)
+		return -ENOMEM;
+	pp->base = pstart;
+	pp->bitmap = 0;
+	for (i = 0; i < start_bit; i++)
+		set_bit(i, &(pp->bitmap));
+	for (i = end_bit; i < PAGE_SIZE / IA32_PAGE_SIZE; i++)
+		set_bit(i, &(pp->bitmap));
+	pp->next = NULL;
+	__ia32_insert_pp(current->thread.ppl, pp, prev, rb_link, rb_parent);
+	return 0;
+}
+
+/*
+ * Delete pp between PAGE_ALIGN(start) and PAGE_START(end) by calling
+ * __ia32_delete_pp_range(). Unset possible partial pages by calling
+ * __ia32_unset_pp().
+ * The returned value see __ia32_unset_pp().
+ */
+static int
+ia32_unset_pp(unsigned int *startp, unsigned int *endp)
+{
+	unsigned int start = *startp, end = *endp;
+	int ret = 0;
+
+	down_write(&current->mm->mmap_sem);
+
+	__ia32_delete_pp_range(PAGE_ALIGN(start), PAGE_START(end));
+
+	if (end < PAGE_ALIGN(start)) {
+		ret = __ia32_unset_pp(start, end);
+		if (ret == 1) {
+			*startp = PAGE_START(start);
+			*endp = PAGE_ALIGN(end);
+		}
+		if (ret == 0) {
+			/* to shortcut sys_munmap() in sys32_munmap() */
+			*startp = PAGE_START(start);
+			*endp = PAGE_START(end);
+		}
+	} else {
+		if (offset_in_page(start)) {
+			ret = __ia32_unset_pp(start, PAGE_ALIGN(start));
+			if (ret == 1)
+				*startp = PAGE_START(start);
+			if (ret == 0)
+				*startp = PAGE_ALIGN(start);
+			if (ret < 0)
+				goto out;
+		}
+		if (offset_in_page(end)) {
+			ret = __ia32_unset_pp(PAGE_START(end), end);
+			if (ret == 1)
+				*endp = PAGE_ALIGN(end);
+			if (ret == 0)
+				*endp = PAGE_START(end);
+		}
+	}
+
+ out:
+	up_write(&current->mm->mmap_sem);
+	return ret;
+}
+
+/*
+ * Compare the range between @start and @end with bitmap in partial page.
+ * @start and @end should be IA32 page aligned and in the same IA64 page.
+ */
+static int
+__ia32_compare_pp(unsigned int start, unsigned int end)
+{
+	struct partial_page *pp, *prev;
+	struct rb_node ** rb_link, *rb_parent;
+	unsigned int pstart, start_bit, end_bit, size;
+	unsigned int first_bit, next_zero_bit;	/* the first range in bitmap */
+
+	pstart = PAGE_START(start);
+
+	pp = __ia32_find_pp(current->thread.ppl, pstart, &prev,
+					&rb_link, &rb_parent);
+	if (!pp)
+		return 1;
+
+	start_bit = (start % PAGE_SIZE) / IA32_PAGE_SIZE;
+	end_bit = (end % PAGE_SIZE) / IA32_PAGE_SIZE;
+	size = sizeof(pp->bitmap) * 8;
+	first_bit = find_first_bit(&pp->bitmap, size);
+	next_zero_bit = find_next_zero_bit(&pp->bitmap, size, first_bit);
+	if ((start_bit < first_bit) || (end_bit > next_zero_bit)) {
+		/* exceeds the first range in bitmap */
+		return -ENOMEM;
+	} else if ((start_bit == first_bit) && (end_bit == next_zero_bit)) {
+		first_bit = find_next_bit(&pp->bitmap, size, next_zero_bit);
+		if ((next_zero_bit < first_bit) && (first_bit < size))
+			return 1;	/* has next range */
+		else
+			return 0; 	/* no next range */
+	} else
+		return 1;
+}
+
+/*
+ * @start and @end should be IA32 page aligned, but don't need to be in the
+ * same IA64 page. Split @start and @end to make sure they're in the same IA64
+ * page, then call __ia32_compare_pp().
+ *
+ * Take this as example: the range is the 1st and 2nd 4K page.
+ * Return 0 if they fit bitmap exactly, i.e. bitmap = 00000011;
+ * Return 1 if the range doesn't cover whole bitmap, e.g. bitmap = 00001111;
+ * Return -ENOMEM if the range exceeds the bitmap, e.g. bitmap = 00000001 or
+ * 	bitmap = 00000101.
+ */
+static int
+ia32_compare_pp(unsigned int *startp, unsigned int *endp)
+{
+	unsigned int start = *startp, end = *endp;
+	int retval = 0;
+
+	down_write(&current->mm->mmap_sem);
+
+	if (end < PAGE_ALIGN(start)) {
+		retval = __ia32_compare_pp(start, end);
+		if (retval == 0) {
+			*startp = PAGE_START(start);
+			*endp = PAGE_ALIGN(end);
+		}
+	} else {
+		if (offset_in_page(start)) {
+			retval = __ia32_compare_pp(start,
+						   PAGE_ALIGN(start));
+			if (retval == 0)
+				*startp = PAGE_START(start);
+			if (retval < 0)
+				goto out;
+		}
+		if (offset_in_page(end)) {
+			retval = __ia32_compare_pp(PAGE_START(end), end);
+			if (retval == 0)
+				*endp = PAGE_ALIGN(end);
+		}
+	}
+
+ out:
+	up_write(&current->mm->mmap_sem);
+	return retval;
+}
+
+static void
+__ia32_drop_pp_list(struct partial_page_list *ppl)
+{
+	struct partial_page *pp = ppl->pp_head;
+
+	while (pp) {
+		struct partial_page *next = pp->next;
+		kmem_cache_free(partial_page_cachep, pp);
+		pp = next;
+	}
+
+	kfree(ppl);
+}
+
+void
+ia32_drop_partial_page_list(struct task_struct *task)
+{
+	struct partial_page_list* ppl = task->thread.ppl;
+
+	if (ppl && atomic_dec_and_test(&ppl->pp_count))
+		__ia32_drop_pp_list(ppl);
+}
+
+/*
+ * Copy current->thread.ppl to ppl (already initialized).
+ */
+static int
+__ia32_copy_pp_list(struct partial_page_list *ppl)
+{
+	struct partial_page *pp, *tmp, *prev;
+	struct rb_node **rb_link, *rb_parent;
+
+	ppl->pp_head = NULL;
+	ppl->pp_hint = NULL;
+	ppl->ppl_rb = RB_ROOT;
+	rb_link = &ppl->ppl_rb.rb_node;
+	rb_parent = NULL;
+	prev = NULL;
+
+	for (pp = current->thread.ppl->pp_head; pp; pp = pp->next) {
+		tmp = kmem_cache_alloc(partial_page_cachep, GFP_KERNEL);
+		if (!tmp)
+			return -ENOMEM;
+		*tmp = *pp;
+		__ia32_insert_pp(ppl, tmp, prev, rb_link, rb_parent);
+		prev = tmp;
+		rb_link = &tmp->pp_rb.rb_right;
+		rb_parent = &tmp->pp_rb;
+	}
+	return 0;
+}
+
+int
+ia32_copy_partial_page_list(struct task_struct *p, unsigned long clone_flags)
+{
+	int retval = 0;
+
+	if (clone_flags & CLONE_VM) {
+		atomic_inc(&current->thread.ppl->pp_count);
+		p->thread.ppl = current->thread.ppl;
+	} else {
+		p->thread.ppl = ia32_init_pp_list();
+		if (!p->thread.ppl)
+			return -ENOMEM;
+		down_write(&current->mm->mmap_sem);
+		{
+			retval = __ia32_copy_pp_list(p->thread.ppl);
+		}
+		up_write(&current->mm->mmap_sem);
+	}
+
+	return retval;
+}
+
+static unsigned long
+emulate_mmap (struct file *file, unsigned long start, unsigned long len, int prot, int flags,
+	      loff_t off)
+{
+	unsigned long tmp, end, pend, pstart, ret, is_congruent, fudge = 0;
+	struct inode *inode;
+	loff_t poff;
+
+	end = start + len;
+	pstart = PAGE_START(start);
+	pend = PAGE_ALIGN(end);
+
+	if (flags & MAP_FIXED) {
+		ia32_set_pp((unsigned int)start, (unsigned int)end, flags);
+		if (start > pstart) {
+			if (flags & MAP_SHARED)
+				printk(KERN_INFO
+				       "%s(%d): emulate_mmap() can't share head (addr=0x%lx)\n",
+				       current->comm, current->pid, start);
+			ret = mmap_subpage(file, start, min(PAGE_ALIGN(start), end), prot, flags,
+					   off);
+			if (IS_ERR((void *) ret))
+				return ret;
+			pstart += PAGE_SIZE;
+			if (pstart >= pend)
+				goto out;	/* done */
+		}
+		if (end < pend) {
+			if (flags & MAP_SHARED)
+				printk(KERN_INFO
+				       "%s(%d): emulate_mmap() can't share tail (end=0x%lx)\n",
+				       current->comm, current->pid, end);
+			ret = mmap_subpage(file, max(start, PAGE_START(end)), end, prot, flags,
+					   (off + len) - offset_in_page(end));
+			if (IS_ERR((void *) ret))
+				return ret;
+			pend -= PAGE_SIZE;
+			if (pstart >= pend)
+				goto out;	/* done */
+		}
+	} else {
+		/*
+		 * If a start address was specified, use it if the entire rounded out area
+		 * is available.
+		 */
+		if (start && !pstart)
+			fudge = 1;	/* handle case of mapping to range (0,PAGE_SIZE) */
+		tmp = arch_get_unmapped_area(file, pstart - fudge, pend - pstart, 0, flags);
+		if (tmp != pstart) {
+			pstart = tmp;
+			start = pstart + offset_in_page(off);	/* make start congruent with off */
+			end = start + len;
+			pend = PAGE_ALIGN(end);
+		}
+	}
+
+	poff = off + (pstart - start);	/* note: (pstart - start) may be negative */
+	is_congruent = (flags & MAP_ANONYMOUS) || (offset_in_page(poff) == 0);
+
+	if ((flags & MAP_SHARED) && !is_congruent)
+		printk(KERN_INFO "%s(%d): emulate_mmap() can't share contents of incongruent mmap "
+		       "(addr=0x%lx,off=0x%llx)\n", current->comm, current->pid, start, off);
+
+	DBG("mmap_body: mapping [0x%lx-0x%lx) %s with poff 0x%llx\n", pstart, pend,
+	    is_congruent ? "congruent" : "not congruent", poff);
+
+	down_write(&current->mm->mmap_sem);
+	{
+		if (!(flags & MAP_ANONYMOUS) && is_congruent)
+			ret = do_mmap(file, pstart, pend - pstart, prot, flags | MAP_FIXED, poff);
+		else
+			ret = do_mmap(NULL, pstart, pend - pstart,
+				      prot | ((flags & MAP_ANONYMOUS) ? 0 : PROT_WRITE),
+				      flags | MAP_FIXED | MAP_ANONYMOUS, 0);
+	}
+	up_write(&current->mm->mmap_sem);
+
+	if (IS_ERR((void *) ret))
+		return ret;
+
+	if (!is_congruent) {
+		/* read the file contents */
+		inode = file->f_dentry->d_inode;
+		if (!inode->i_fop || !file->f_op->read
+		    || ((*file->f_op->read)(file, (char __user *) pstart, pend - pstart, &poff)
+			< 0))
+		{
+			sys_munmap(pstart, pend - pstart);
+			return -EINVAL;
+		}
+		if (!(prot & PROT_WRITE) && sys_mprotect(pstart, pend - pstart, prot) < 0)
+			return -EINVAL;
+	}
+
+	if (!(flags & MAP_FIXED))
+		ia32_set_pp((unsigned int)start, (unsigned int)end, flags);
+out:
+	return start;
+}
+
+#endif /* PAGE_SHIFT > IA32_PAGE_SHIFT */
+
+static inline unsigned int
+get_prot32 (unsigned int prot)
+{
+	if (prot & PROT_WRITE)
+		/* on x86, PROT_WRITE implies PROT_READ which implies PROT_EEC */
+		prot |= PROT_READ | PROT_WRITE | PROT_EXEC;
+	else if (prot & (PROT_READ | PROT_EXEC))
+		/* on x86, there is no distinction between PROT_READ and PROT_EXEC */
+		prot |= (PROT_READ | PROT_EXEC);
+
+	return prot;
+}
+
+unsigned long
+ia32_do_mmap (struct file *file, unsigned long addr, unsigned long len, int prot, int flags,
+	      loff_t offset)
+{
+	DBG("ia32_do_mmap(file=%p,addr=0x%lx,len=0x%lx,prot=%x,flags=%x,offset=0x%llx)\n",
+	    file, addr, len, prot, flags, offset);
+
+	if (file && (!file->f_op || !file->f_op->mmap))
+		return -ENODEV;
+
+	len = IA32_PAGE_ALIGN(len);
+	if (len == 0)
+		return addr;
+
+	if (len > IA32_PAGE_OFFSET || addr > IA32_PAGE_OFFSET - len)
+	{
+		if (flags & MAP_FIXED)
+			return -ENOMEM;
+		else
+		return -EINVAL;
+	}
+
+	if (OFFSET4K(offset))
+		return -EINVAL;
+
+	prot = get_prot32(prot);
+
+#if PAGE_SHIFT > IA32_PAGE_SHIFT
+	down(&ia32_mmap_sem);
+	{
+		addr = emulate_mmap(file, addr, len, prot, flags, offset);
+	}
+	up(&ia32_mmap_sem);
+#else
+	down_write(&current->mm->mmap_sem);
+	{
+		addr = do_mmap(file, addr, len, prot, flags, offset);
+	}
+	up_write(&current->mm->mmap_sem);
+#endif
+	DBG("ia32_do_mmap: returning 0x%lx\n", addr);
+	return addr;
+}
+
+/*
+ * 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 addr;
+	int flags;
+
+	if (copy_from_user(&a, arg, sizeof(a)))
+		return -EFAULT;
+
+	if (OFFSET4K(a.offset))
+		return -EINVAL;
+
+	flags = a.flags;
+
+	flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
+	if (!(flags & MAP_ANONYMOUS)) {
+		file = fget(a.fd);
+		if (!file)
+			return -EBADF;
+	}
+
+	addr = ia32_do_mmap(file, a.addr, a.len, a.prot, flags, a.offset);
+
+	if (file)
+		fput(file);
+	return addr;
+}
+
+asmlinkage long
+sys32_mmap2 (unsigned int addr, unsigned int len, unsigned int prot, unsigned int flags,
+	     unsigned int fd, unsigned int pgoff)
+{
+	struct file *file = NULL;
+	unsigned long retval;
+
+	flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
+	if (!(flags & MAP_ANONYMOUS)) {
+		file = fget(fd);
+		if (!file)
+			return -EBADF;
+	}
+
+	retval = ia32_do_mmap(file, addr, len, prot, flags,
+			      (unsigned long) pgoff << IA32_PAGE_SHIFT);
+
+	if (file)
+		fput(file);
+	return retval;
+}
+
+asmlinkage long
+sys32_munmap (unsigned int start, unsigned int len)
+{
+	unsigned int end = start + len;
+	long ret;
+
+#if PAGE_SHIFT <= IA32_PAGE_SHIFT
+	ret = sys_munmap(start, end - start);
+#else
+	if (OFFSET4K(start))
+		return -EINVAL;
+
+	end = IA32_PAGE_ALIGN(end);
+	if (start >= end)
+		return -EINVAL;
+
+	ret = ia32_unset_pp(&start, &end);
+	if (ret < 0)
+		return ret;
+
+	if (start >= end)
+		return 0;
+
+	down(&ia32_mmap_sem);
+	{
+		ret = sys_munmap(start, end - start);
+	}
+	up(&ia32_mmap_sem);
+#endif
+	return ret;
+}
+
+#if PAGE_SHIFT > IA32_PAGE_SHIFT
+
+/*
+ * When mprotect()ing a partial page, we set the permission to the union of the old
+ * settings and the new settings.  In other words, it's only possible to make access to a
+ * partial page less restrictive.
+ */
+static long
+mprotect_subpage (unsigned long address, int new_prot)
+{
+	int old_prot;
+	struct vm_area_struct *vma;
+
+	if (new_prot == PROT_NONE)
+		return 0;		/* optimize case where nothing changes... */
+	vma = find_vma(current->mm, address);
+	old_prot = get_page_prot(vma, address);
+	return sys_mprotect(address, PAGE_SIZE, new_prot | old_prot);
+}
+
+#endif /* PAGE_SHIFT > IA32_PAGE_SHIFT */
+
+asmlinkage long
+sys32_mprotect (unsigned int start, unsigned int len, int prot)
+{
+	unsigned int end = start + len;
+#if PAGE_SHIFT > IA32_PAGE_SHIFT
+	long retval = 0;
+#endif
+
+	prot = get_prot32(prot);
+
+#if PAGE_SHIFT <= IA32_PAGE_SHIFT
+	return sys_mprotect(start, end - start, prot);
+#else
+	if (OFFSET4K(start))
+		return -EINVAL;
+
+	end = IA32_PAGE_ALIGN(end);
+	if (end < start)
+		return -EINVAL;
+
+	retval = ia32_compare_pp(&start, &end);
+
+	if (retval < 0)
+		return retval;
+
+	down(&ia32_mmap_sem);
+	{
+		if (offset_in_page(start)) {
+			/* start address is 4KB aligned but not page aligned. */
+			retval = mprotect_subpage(PAGE_START(start), prot);
+			if (retval < 0)
+				goto out;
+
+			start = PAGE_ALIGN(start);
+			if (start >= end)
+				goto out;	/* retval is already zero... */
+		}
+
+		if (offset_in_page(end)) {
+			/* end address is 4KB aligned but not page aligned. */
+			retval = mprotect_subpage(PAGE_START(end), prot);
+			if (retval < 0)
+				goto out;
+
+			end = PAGE_START(end);
+		}
+		retval = sys_mprotect(start, end - start, prot);
+	}
+  out:
+	up(&ia32_mmap_sem);
+	return retval;
+#endif
+}
+
+asmlinkage long
+sys32_mremap (unsigned int addr, unsigned int old_len, unsigned int new_len,
+		unsigned int flags, unsigned int new_addr)
+{
+	long ret;
+
+#if PAGE_SHIFT <= IA32_PAGE_SHIFT
+	ret = sys_mremap(addr, old_len, new_len, flags, new_addr);
+#else
+	unsigned int old_end, new_end;
+
+	if (OFFSET4K(addr))
+		return -EINVAL;
+
+	old_len = IA32_PAGE_ALIGN(old_len);
+	new_len = IA32_PAGE_ALIGN(new_len);
+	old_end = addr + old_len;
+	new_end = addr + new_len;
+
+	if (!new_len)
+		return -EINVAL;
+
+	if ((flags & MREMAP_FIXED) && (OFFSET4K(new_addr)))
+		return -EINVAL;
+
+	if (old_len >= new_len) {
+		ret = sys32_munmap(addr + new_len, old_len - new_len);
+		if (ret && old_len != new_len)
+			return ret;
+		ret = addr;
+		if (!(flags & MREMAP_FIXED) || (new_addr == addr))
+			return ret;
+		old_len = new_len;
+	}
+
+	addr = PAGE_START(addr);
+	old_len = PAGE_ALIGN(old_end) - addr;
+	new_len = PAGE_ALIGN(new_end) - addr;
+
+	down(&ia32_mmap_sem);
+	{
+		ret = sys_mremap(addr, old_len, new_len, flags, new_addr);
+	}
+	up(&ia32_mmap_sem);
+
+	if ((ret >= 0) && (old_len < new_len)) {
+		/* mremap expanded successfully */
+		ia32_set_pp(old_end, new_end, flags);
+	}
+#endif
+	return ret;
+}
+
+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;
+}
+
+static inline long
+get_tv32 (struct timeval *o, struct compat_timeval __user *i)
+{
+	return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
+		(__get_user(o->tv_sec, &i->tv_sec) | __get_user(o->tv_usec, &i->tv_usec)));
+}
+
+static inline long
+put_tv32 (struct compat_timeval __user *o, struct timeval *i)
+{
+	return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
+		(__put_user(i->tv_sec, &o->tv_sec) | __put_user(i->tv_usec, &o->tv_usec)));
+}
+
+asmlinkage unsigned long
+sys32_alarm (unsigned int seconds)
+{
+	struct itimerval it_new, it_old;
+	unsigned int oldalarm;
+
+	it_new.it_interval.tv_sec = it_new.it_interval.tv_usec = 0;
+	it_new.it_value.tv_sec = seconds;
+	it_new.it_value.tv_usec = 0;
+	do_setitimer(ITIMER_REAL, &it_new, &it_old);
+	oldalarm = it_old.it_value.tv_sec;
+	/* ehhh.. We can't return 0 if we have an alarm pending.. */
+	/* And we'd better return too much than too little anyway */
+	if (it_old.it_value.tv_usec)
+		oldalarm++;
+	return oldalarm;
+}
+
+/* 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 * 1000;
+	}
+	if (tz) {
+		if (copy_from_user(&ktz, tz, sizeof(ktz)))
+			return -EFAULT;
+	}
+
+	return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
+}
+
+struct getdents32_callback {
+	struct compat_dirent __user *current_dir;
+	struct compat_dirent __user *previous;
+	int count;
+	int error;
+};
+
+struct readdir32_callback {
+	struct old_linux32_dirent __user * dirent;
+	int count;
+};
+
+static int
+filldir32 (void *__buf, const char *name, int namlen, loff_t offset, ino_t ino,
+	   unsigned int d_type)
+{
+	struct compat_dirent __user * dirent;
+	struct getdents32_callback * buf = (struct getdents32_callback *) __buf;
+	int reclen = ROUND_UP(offsetof(struct compat_dirent, d_name) + namlen + 1, 4);
+
+	buf->error = -EINVAL;	/* only used if we fail.. */
+	if (reclen > buf->count)
+		return -EINVAL;
+	buf->error = -EFAULT;	/* only used if we fail.. */
+	dirent = buf->previous;
+	if (dirent)
+		if (put_user(offset, &dirent->d_off))
+			return -EFAULT;
+	dirent = buf->current_dir;
+	buf->previous = dirent;
+	if (put_user(ino, &dirent->d_ino)
+	    || put_user(reclen, &dirent->d_reclen)
+	    || copy_to_user(dirent->d_name, name, namlen)
+	    || put_user(0, dirent->d_name + namlen))
+		return -EFAULT;
+	dirent = (struct compat_dirent __user *) ((char __user *) dirent + reclen);
+	buf->current_dir = dirent;
+	buf->count -= reclen;
+	return 0;
+}
+
+asmlinkage long
+sys32_getdents (unsigned int fd, struct compat_dirent __user *dirent, unsigned int count)
+{
+	struct file * file;
+	struct compat_dirent __user * lastdirent;
+	struct getdents32_callback buf;
+	int error;
+
+	error = -EBADF;
+	file = fget(fd);
+	if (!file)
+		goto out;
+
+	buf.current_dir = dirent;
+	buf.previous = NULL;
+	buf.count = count;
+	buf.error = 0;
+
+	error = vfs_readdir(file, filldir32, &buf);
+	if (error < 0)
+		goto out_putf;
+	error = buf.error;
+	lastdirent = buf.previous;
+	if (lastdirent) {
+		error = -EINVAL;
+		if (put_user(file->f_pos, &lastdirent->d_off))
+			goto out_putf;
+		error = count - buf.count;
+	}
+
+out_putf:
+	fput(file);
+out:
+	return error;
+}
+
+static int
+fillonedir32 (void * __buf, const char * name, int namlen, loff_t offset, ino_t ino,
+	      unsigned int d_type)
+{
+	struct readdir32_callback * buf = (struct readdir32_callback *) __buf;
+	struct old_linux32_dirent __user * dirent;
+
+	if (buf->count)
+		return -EINVAL;
+	buf->count++;
+	dirent = buf->dirent;
+	if (put_user(ino, &dirent->d_ino)
+	    || put_user(offset, &dirent->d_offset)
+	    || put_user(namlen, &dirent->d_namlen)
+	    || copy_to_user(dirent->d_name, name, namlen)
+	    || put_user(0, dirent->d_name + namlen))
+		return -EFAULT;
+	return 0;
+}
+
+asmlinkage long
+sys32_readdir (unsigned int fd, void __user *dirent, unsigned int count)
+{
+	int error;
+	struct file * file;
+	struct readdir32_callback buf;
+
+	error = -EBADF;
+	file = fget(fd);
+	if (!file)
+		goto out;
+
+	buf.count = 0;
+	buf.dirent = dirent;
+
+	error = vfs_readdir(file, fillonedir32, &buf);
+	if (error >= 0)
+		error = buf.count;
+	fput(file);
+out:
+	return error;
+}
+
+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));
+}
+
+#define SEMOP		 1
+#define SEMGET		 2
+#define SEMCTL		 3
+#define SEMTIMEDOP	 4
+#define MSGSND		11
+#define MSGRCV		12
+#define MSGGET		13
+#define MSGCTL		14
+#define SHMAT		21
+#define SHMDT		22
+#define SHMGET		23
+#define SHMCTL		24
+
+asmlinkage long
+sys32_ipc(u32 call, int first, int second, int third, u32 ptr, u32 fifth)
+{
+	int version;
+
+	version = call >> 16; /* hack for backward compatibility */
+	call &= 0xffff;
+
+	switch (call) {
+	      case SEMTIMEDOP:
+		if (fifth)
+			return compat_sys_semtimedop(first, compat_ptr(ptr),
+				second, compat_ptr(fifth));
+		/* else fall through for normal semop() */
+	      case SEMOP:
+		/* struct sembuf is the same on 32 and 64bit :)) */
+		return sys_semtimedop(first, compat_ptr(ptr), second,
+				      NULL);
+	      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));
+
+	      default:
+		return -ENOSYS;
+	}
+	return -EINVAL;
+}
+
+asmlinkage long
+compat_sys_wait4 (compat_pid_t pid, compat_uint_t * stat_addr, int options,
+		 struct compat_rusage *ru);
+
+asmlinkage long
+sys32_waitpid (int pid, unsigned int *stat_addr, int options)
+{
+	return compat_sys_wait4(pid, stat_addr, options, NULL);
+}
+
+static unsigned int
+ia32_peek (struct task_struct *child, unsigned long addr, unsigned int *val)
+{
+	size_t copied;
+	unsigned int ret;
+
+	copied = access_process_vm(child, addr, val, sizeof(*val), 0);
+	return (copied != sizeof(ret)) ? -EIO : 0;
+}
+
+static unsigned int
+ia32_poke (struct task_struct *child, unsigned long addr, unsigned int val)
+{
+
+	if (access_process_vm(child, addr, &val, sizeof(val), 1) != sizeof(val))
+		return -EIO;
+	return 0;
+}
+
+/*
+ *  The order in which registers are stored in the ptrace regs structure
+ */
+#define PT_EBX	0
+#define PT_ECX	1
+#define PT_EDX	2
+#define PT_ESI	3
+#define PT_EDI	4
+#define PT_EBP	5
+#define PT_EAX	6
+#define PT_DS	7
+#define PT_ES	8
+#define PT_FS	9
+#define PT_GS	10
+#define PT_ORIG_EAX 11
+#define PT_EIP	12
+#define PT_CS	13
+#define PT_EFL	14
+#define PT_UESP	15
+#define PT_SS	16
+
+static unsigned int
+getreg (struct task_struct *child, int regno)
+{
+	struct pt_regs *child_regs;
+
+	child_regs = ia64_task_regs(child);
+	switch (regno / sizeof(int)) {
+	      case PT_EBX: return child_regs->r11;
+	      case PT_ECX: return child_regs->r9;
+	      case PT_EDX: return child_regs->r10;
+	      case PT_ESI: return child_regs->r14;
+	      case PT_EDI: return child_regs->r15;
+	      case PT_EBP: return child_regs->r13;
+	      case PT_EAX: return child_regs->r8;
+	      case PT_ORIG_EAX: return child_regs->r1; /* see dispatch_to_ia32_handler() */
+	      case PT_EIP: return child_regs->cr_iip;
+	      case PT_UESP: return child_regs->r12;
+	      case PT_EFL: return child->thread.eflag;
+	      case PT_DS: case PT_ES: case PT_FS: case PT_GS: case PT_SS:
+		return __USER_DS;
+	      case PT_CS: return __USER_CS;
+	      default:
+		printk(KERN_ERR "ia32.getreg(): unknown register %d\n", regno);
+		break;
+	}
+	return 0;
+}
+
+static void
+putreg (struct task_struct *child, int regno, unsigned int value)
+{
+	struct pt_regs *child_regs;
+
+	child_regs = ia64_task_regs(child);
+	switch (regno / sizeof(int)) {
+	      case PT_EBX: child_regs->r11 = value; break;
+	      case PT_ECX: child_regs->r9 = value; break;
+	      case PT_EDX: child_regs->r10 = value; break;
+	      case PT_ESI: child_regs->r14 = value; break;
+	      case PT_EDI: child_regs->r15 = value; break;
+	      case PT_EBP: child_regs->r13 = value; break;
+	      case PT_EAX: child_regs->r8 = value; break;
+	      case PT_ORIG_EAX: child_regs->r1 = value; break;
+	      case PT_EIP: child_regs->cr_iip = value; break;
+	      case PT_UESP: child_regs->r12 = value; break;
+	      case PT_EFL: child->thread.eflag = value; break;
+	      case PT_DS: case PT_ES: case PT_FS: case PT_GS: case PT_SS:
+		if (value != __USER_DS)
+			printk(KERN_ERR
+			       "ia32.putreg: attempt to set invalid segment register %d = %x\n",
+			       regno, value);
+		break;
+	      case PT_CS:
+		if (value != __USER_CS)
+			printk(KERN_ERR
+			       "ia32.putreg: attempt to to set invalid segment register %d = %x\n",
+			       regno, value);
+		break;
+	      default:
+		printk(KERN_ERR "ia32.putreg: unknown register %d\n", regno);
+		break;
+	}
+}
+
+static void
+put_fpreg (int regno, struct _fpreg_ia32 __user *reg, struct pt_regs *ptp,
+	   struct switch_stack *swp, int tos)
+{
+	struct _fpreg_ia32 *f;
+	char buf[32];
+
+	f = (struct _fpreg_ia32 *)(((unsigned long)buf + 15) & ~15);
+	if ((regno += tos) >= 8)
+		regno -= 8;
+	switch (regno) {
+	      case 0:
+		ia64f2ia32f(f, &ptp->f8);
+		break;
+	      case 1:
+		ia64f2ia32f(f, &ptp->f9);
+		break;
+	      case 2:
+		ia64f2ia32f(f, &ptp->f10);
+		break;
+	      case 3:
+		ia64f2ia32f(f, &ptp->f11);
+		break;
+	      case 4:
+	      case 5:
+	      case 6:
+	      case 7:
+		ia64f2ia32f(f, &swp->f12 + (regno - 4));
+		break;
+	}
+	copy_to_user(reg, f, sizeof(*reg));
+}
+
+static void
+get_fpreg (int regno, struct _fpreg_ia32 __user *reg, struct pt_regs *ptp,
+	   struct switch_stack *swp, int tos)
+{
+
+	if ((regno += tos) >= 8)
+		regno -= 8;
+	switch (regno) {
+	      case 0:
+		copy_from_user(&ptp->f8, reg, sizeof(*reg));
+		break;
+	      case 1:
+		copy_from_user(&ptp->f9, reg, sizeof(*reg));
+		break;
+	      case 2:
+		copy_from_user(&ptp->f10, reg, sizeof(*reg));
+		break;
+	      case 3:
+		copy_from_user(&ptp->f11, reg, sizeof(*reg));
+		break;
+	      case 4:
+	      case 5:
+	      case 6:
+	      case 7:
+		copy_from_user(&swp->f12 + (regno - 4), reg, sizeof(*reg));
+		break;
+	}
+	return;
+}
+
+int
+save_ia32_fpstate (struct task_struct *tsk, struct ia32_user_i387_struct __user *save)
+{
+	struct switch_stack *swp;
+	struct pt_regs *ptp;
+	int i, tos;
+
+	if (!access_ok(VERIFY_WRITE, save, sizeof(*save)))
+		return -EFAULT;
+
+	__put_user(tsk->thread.fcr & 0xffff, &save->cwd);
+	__put_user(tsk->thread.fsr & 0xffff, &save->swd);
+	__put_user((tsk->thread.fsr>>16) & 0xffff, &save->twd);
+	__put_user(tsk->thread.fir, &save->fip);
+	__put_user((tsk->thread.fir>>32) & 0xffff, &save->fcs);
+	__put_user(tsk->thread.fdr, &save->foo);
+	__put_user((tsk->thread.fdr>>32) & 0xffff, &save->fos);
+
+	/*
+	 *  Stack frames start with 16-bytes of temp space
+	 */
+	swp = (struct switch_stack *)(tsk->thread.ksp + 16);
+	ptp = ia64_task_regs(tsk);
+	tos = (tsk->thread.fsr >> 11) & 7;
+	for (i = 0; i < 8; i++)
+		put_fpreg(i, &save->st_space[i], ptp, swp, tos);
+	return 0;
+}
+
+static int
+restore_ia32_fpstate (struct task_struct *tsk, struct ia32_user_i387_struct __user *save)
+{
+	struct switch_stack *swp;
+	struct pt_regs *ptp;
+	int i, tos;
+	unsigned int fsrlo, fsrhi, num32;
+
+	if (!access_ok(VERIFY_READ, save, sizeof(*save)))
+		return(-EFAULT);
+
+	__get_user(num32, (unsigned int __user *)&save->cwd);
+	tsk->thread.fcr = (tsk->thread.fcr & (~0x1f3f)) | (num32 & 0x1f3f);
+	__get_user(fsrlo, (unsigned int __user *)&save->swd);
+	__get_user(fsrhi, (unsigned int __user *)&save->twd);
+	num32 = (fsrhi << 16) | fsrlo;
+	tsk->thread.fsr = (tsk->thread.fsr & (~0xffffffff)) | num32;
+	__get_user(num32, (unsigned int __user *)&save->fip);
+	tsk->thread.fir = (tsk->thread.fir & (~0xffffffff)) | num32;
+	__get_user(num32, (unsigned int __user *)&save->foo);
+	tsk->thread.fdr = (tsk->thread.fdr & (~0xffffffff)) | num32;
+
+	/*
+	 *  Stack frames start with 16-bytes of temp space
+	 */
+	swp = (struct switch_stack *)(tsk->thread.ksp + 16);
+	ptp = ia64_task_regs(tsk);
+	tos = (tsk->thread.fsr >> 11) & 7;
+	for (i = 0; i < 8; i++)
+		get_fpreg(i, &save->st_space[i], ptp, swp, tos);
+	return 0;
+}
+
+int
+save_ia32_fpxstate (struct task_struct *tsk, struct ia32_user_fxsr_struct __user *save)
+{
+	struct switch_stack *swp;
+	struct pt_regs *ptp;
+	int i, tos;
+	unsigned long mxcsr=0;
+	unsigned long num128[2];
+
+	if (!access_ok(VERIFY_WRITE, save, sizeof(*save)))
+		return -EFAULT;
+
+	__put_user(tsk->thread.fcr & 0xffff, &save->cwd);
+	__put_user(tsk->thread.fsr & 0xffff, &save->swd);
+	__put_user((tsk->thread.fsr>>16) & 0xffff, &save->twd);
+	__put_user(tsk->thread.fir, &save->fip);
+	__put_user((tsk->thread.fir>>32) & 0xffff, &save->fcs);
+	__put_user(tsk->thread.fdr, &save->foo);
+	__put_user((tsk->thread.fdr>>32) & 0xffff, &save->fos);
+
+        /*
+         *  Stack frames start with 16-bytes of temp space
+         */
+        swp = (struct switch_stack *)(tsk->thread.ksp + 16);
+        ptp = ia64_task_regs(tsk);
+	tos = (tsk->thread.fsr >> 11) & 7;
+        for (i = 0; i < 8; i++)
+		put_fpreg(i, (struct _fpreg_ia32 __user *)&save->st_space[4*i], ptp, swp, tos);
+
+	mxcsr = ((tsk->thread.fcr>>32) & 0xff80) | ((tsk->thread.fsr>>32) & 0x3f);
+	__put_user(mxcsr & 0xffff, &save->mxcsr);
+	for (i = 0; i < 8; i++) {
+		memcpy(&(num128[0]), &(swp->f16) + i*2, sizeof(unsigned long));
+		memcpy(&(num128[1]), &(swp->f17) + i*2, sizeof(unsigned long));
+		copy_to_user(&save->xmm_space[0] + 4*i, num128, sizeof(struct _xmmreg_ia32));
+	}
+	return 0;
+}
+
+static int
+restore_ia32_fpxstate (struct task_struct *tsk, struct ia32_user_fxsr_struct __user *save)
+{
+	struct switch_stack *swp;
+	struct pt_regs *ptp;
+	int i, tos;
+	unsigned int fsrlo, fsrhi, num32;
+	int mxcsr;
+	unsigned long num64;
+	unsigned long num128[2];
+
+	if (!access_ok(VERIFY_READ, save, sizeof(*save)))
+		return(-EFAULT);
+
+	__get_user(num32, (unsigned int __user *)&save->cwd);
+	tsk->thread.fcr = (tsk->thread.fcr & (~0x1f3f)) | (num32 & 0x1f3f);
+	__get_user(fsrlo, (unsigned int __user *)&save->swd);
+	__get_user(fsrhi, (unsigned int __user *)&save->twd);
+	num32 = (fsrhi << 16) | fsrlo;
+	tsk->thread.fsr = (tsk->thread.fsr & (~0xffffffff)) | num32;
+	__get_user(num32, (unsigned int __user *)&save->fip);
+	tsk->thread.fir = (tsk->thread.fir & (~0xffffffff)) | num32;
+	__get_user(num32, (unsigned int __user *)&save->foo);
+	tsk->thread.fdr = (tsk->thread.fdr & (~0xffffffff)) | num32;
+
+	/*
+	 *  Stack frames start with 16-bytes of temp space
+	 */
+	swp = (struct switch_stack *)(tsk->thread.ksp + 16);
+	ptp = ia64_task_regs(tsk);
+	tos = (tsk->thread.fsr >> 11) & 7;
+	for (i = 0; i < 8; i++)
+	get_fpreg(i, (struct _fpreg_ia32 __user *)&save->st_space[4*i], ptp, swp, tos);
+
+	__get_user(mxcsr, (unsigned int __user *)&save->mxcsr);
+	num64 = mxcsr & 0xff10;
+	tsk->thread.fcr = (tsk->thread.fcr & (~0xff1000000000UL)) | (num64<<32);
+	num64 = mxcsr & 0x3f;
+	tsk->thread.fsr = (tsk->thread.fsr & (~0x3f00000000UL)) | (num64<<32);
+
+	for (i = 0; i < 8; i++) {
+		copy_from_user(num128, &save->xmm_space[0] + 4*i, sizeof(struct _xmmreg_ia32));
+		memcpy(&(swp->f16) + i*2, &(num128[0]), sizeof(unsigned long));
+		memcpy(&(swp->f17) + i*2, &(num128[1]), sizeof(unsigned long));
+	}
+	return 0;
+}
+
+asmlinkage long
+sys32_ptrace (int request, pid_t pid, unsigned int addr, unsigned int data)
+{
+	struct task_struct *child;
+	unsigned int value, tmp;
+	long i, ret;
+
+	lock_kernel();
+	if (request == PTRACE_TRACEME) {
+		ret = sys_ptrace(request, pid, addr, data);
+		goto out;
+	}
+
+	ret = -ESRCH;
+	read_lock(&tasklist_lock);
+	child = find_task_by_pid(pid);
+	if (child)
+		get_task_struct(child);
+	read_unlock(&tasklist_lock);
+	if (!child)
+		goto out;
+	ret = -EPERM;
+	if (pid == 1)		/* no messing around with init! */
+		goto out_tsk;
+
+	if (request == PTRACE_ATTACH) {
+		ret = sys_ptrace(request, pid, addr, data);
+		goto out_tsk;
+	}
+
+	ret = ptrace_check_attach(child, request == PTRACE_KILL);
+	if (ret < 0)
+		goto out_tsk;
+
+	switch (request) {
+	      case PTRACE_PEEKTEXT:
+	      case PTRACE_PEEKDATA:	/* read word at location addr */
+		ret = ia32_peek(child, addr, &value);
+		if (ret == 0)
+			ret = put_user(value, (unsigned int __user *) compat_ptr(data));
+		else
+			ret = -EIO;
+		goto out_tsk;
+
+	      case PTRACE_POKETEXT:
+	      case PTRACE_POKEDATA:	/* write the word at location addr */
+		ret = ia32_poke(child, addr, data);
+		goto out_tsk;
+
+	      case PTRACE_PEEKUSR:	/* read word at addr in USER area */
+		ret = -EIO;
+		if ((addr & 3) || addr > 17*sizeof(int))
+			break;
+
+		tmp = getreg(child, addr);
+		if (!put_user(tmp, (unsigned int __user *) compat_ptr(data)))
+			ret = 0;
+		break;
+
+	      case PTRACE_POKEUSR:	/* write word at addr in USER area */
+		ret = -EIO;
+		if ((addr & 3) || addr > 17*sizeof(int))
+			break;
+
+		putreg(child, addr, data);
+		ret = 0;
+		break;
+
+	      case IA32_PTRACE_GETREGS:
+		if (!access_ok(VERIFY_WRITE, compat_ptr(data), 17*sizeof(int))) {
+			ret = -EIO;
+			break;
+		}
+		for (i = 0; i < (int) (17*sizeof(int)); i += sizeof(int) ) {
+			put_user(getreg(child, i), (unsigned int __user *) compat_ptr(data));
+			data += sizeof(int);
+		}
+		ret = 0;
+		break;
+
+	      case IA32_PTRACE_SETREGS:
+		if (!access_ok(VERIFY_READ, compat_ptr(data), 17*sizeof(int))) {
+			ret = -EIO;
+			break;
+		}
+		for (i = 0; i < (int) (17*sizeof(int)); i += sizeof(int) ) {
+			get_user(tmp, (unsigned int __user *) compat_ptr(data));
+			putreg(child, i, tmp);
+			data += sizeof(int);
+		}
+		ret = 0;
+		break;
+
+	      case IA32_PTRACE_GETFPREGS:
+		ret = save_ia32_fpstate(child, (struct ia32_user_i387_struct __user *)
+					compat_ptr(data));
+		break;
+
+	      case IA32_PTRACE_GETFPXREGS:
+		ret = save_ia32_fpxstate(child, (struct ia32_user_fxsr_struct __user *)
+					 compat_ptr(data));
+		break;
+
+	      case IA32_PTRACE_SETFPREGS:
+		ret = restore_ia32_fpstate(child, (struct ia32_user_i387_struct __user *)
+					   compat_ptr(data));
+		break;
+
+	      case IA32_PTRACE_SETFPXREGS:
+		ret = restore_ia32_fpxstate(child, (struct ia32_user_fxsr_struct __user *)
+					    compat_ptr(data));
+		break;
+
+	      case PTRACE_GETEVENTMSG:   
+		ret = put_user(child->ptrace_message, (unsigned int __user *) compat_ptr(data));
+		break;
+
+	      case PTRACE_SYSCALL:	/* continue, stop after next syscall */
+	      case PTRACE_CONT:		/* restart after signal. */
+	      case PTRACE_KILL:
+	      case PTRACE_SINGLESTEP:	/* execute chile for one instruction */
+	      case PTRACE_DETACH:	/* detach a process */
+		ret = sys_ptrace(request, pid, addr, data);
+		break;
+
+	      default:
+		ret = ptrace_request(child, request, addr, data);
+		break;
+
+	}
+  out_tsk:
+	put_task_struct(child);
+  out:
+	unlock_kernel();
+	return ret;
+}
+
+typedef struct {
+	unsigned int	ss_sp;
+	unsigned int	ss_flags;
+	unsigned int	ss_size;
+} ia32_stack_t;
+
+asmlinkage long
+sys32_sigaltstack (ia32_stack_t __user *uss32, ia32_stack_t __user *uoss32,
+		   long arg2, long arg3, long arg4, long arg5, long arg6,
+		   long arg7, struct pt_regs pt)
+{
+	stack_t uss, uoss;
+	ia32_stack_t buf32;
+	int ret;
+	mm_segment_t old_fs = get_fs();
+
+	if (uss32) {
+		if (copy_from_user(&buf32, uss32, sizeof(ia32_stack_t)))
+			return -EFAULT;
+		uss.ss_sp = (void __user *) (long) buf32.ss_sp;
+		uss.ss_flags = buf32.ss_flags;
+		/* MINSIGSTKSZ is different for ia32 vs ia64. We lie here to pass the
+	           check and set it to the user requested value later */
+		if ((buf32.ss_flags != SS_DISABLE) && (buf32.ss_size < MINSIGSTKSZ_IA32)) {
+			ret = -ENOMEM;
+			goto out;
+		}
+		uss.ss_size = MINSIGSTKSZ;
+	}
+	set_fs(KERNEL_DS);
+	ret = do_sigaltstack(uss32 ? (stack_t __user *) &uss : NULL,
+			     (stack_t __user *) &uoss, pt.r12);
+ 	current->sas_ss_size = buf32.ss_size;
+	set_fs(old_fs);
+out:
+	if (ret < 0)
+		return(ret);
+	if (uoss32) {
+		buf32.ss_sp = (long __user) uoss.ss_sp;
+		buf32.ss_flags = uoss.ss_flags;
+		buf32.ss_size = uoss.ss_size;
+		if (copy_to_user(uoss32, &buf32, sizeof(ia32_stack_t)))
+			return -EFAULT;
+	}
+	return ret;
+}
+
+asmlinkage int
+sys32_pause (void)
+{
+	current->state = TASK_INTERRUPTIBLE;
+	schedule();
+	return -ERESTARTNOHAND;
+}
+
+asmlinkage int
+sys32_msync (unsigned int start, unsigned int len, int flags)
+{
+	unsigned int addr;
+
+	if (OFFSET4K(start))
+		return -EINVAL;
+	addr = PAGE_START(start);
+	return sys_msync(addr, len + (start - addr), flags);
+}
+
+struct sysctl32 {
+	unsigned int	name;
+	int		nlen;
+	unsigned int	oldval;
+	unsigned int	oldlenp;
+	unsigned int	newval;
+	unsigned int	newlen;
+	unsigned int	__unused[4];
+};
+
+#ifdef CONFIG_SYSCTL
+asmlinkage long
+sys32_sysctl (struct sysctl32 __user *args)
+{
+	struct sysctl32 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, args, 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 = (int __user *) 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
+
+asmlinkage long
+sys32_newuname (struct new_utsname __user *name)
+{
+	int ret = sys_newuname(name);
+
+	if (!ret)
+		if (copy_to_user(name->machine, "i686\0\0\0", 8))
+			ret = -EFAULT;
+	return ret;
+}
+
+asmlinkage long
+sys32_getresuid16 (u16 __user *ruid, u16 __user *euid, u16 __user *suid)
+{
+	uid_t a, b, c;
+	int ret;
+	mm_segment_t old_fs = get_fs();
+
+	set_fs(KERNEL_DS);
+	ret = sys_getresuid((uid_t __user *) &a, (uid_t __user *) &b, (uid_t __user *) &c);
+	set_fs(old_fs);
+
+	if (put_user(a, ruid) || put_user(b, euid) || put_user(c, suid))
+		return -EFAULT;
+	return ret;
+}
+
+asmlinkage long
+sys32_getresgid16 (u16 __user *rgid, u16 __user *egid, u16 __user *sgid)
+{
+	gid_t a, b, c;
+	int ret;
+	mm_segment_t old_fs = get_fs();
+
+	set_fs(KERNEL_DS);
+	ret = sys_getresgid((gid_t __user *) &a, (gid_t __user *) &b, (gid_t __user *) &c);
+	set_fs(old_fs);
+
+	if (ret)
+		return ret;
+
+	return put_user(a, rgid) | put_user(b, egid) | put_user(c, sgid);
+}
+
+asmlinkage long
+sys32_lseek (unsigned int fd, int offset, unsigned int whence)
+{
+	/* Sign-extension of "offset" is important here... */
+	return sys_lseek(fd, offset, whence);
+}
+
+static int
+groups16_to_user(short __user *grouplist, struct group_info *group_info)
+{
+	int i;
+	short group;
+
+	for (i = 0; i < group_info->ngroups; i++) {
+		group = (short)GROUP_AT(group_info, i);
+		if (put_user(group, grouplist+i))
+			return -EFAULT;
+	}
+
+	return 0;
+}
+
+static int
+groups16_from_user(struct group_info *group_info, short __user *grouplist)
+{
+	int i;
+	short group;
+
+	for (i = 0; i < group_info->ngroups; i++) {
+		if (get_user(group, grouplist+i))
+			return  -EFAULT;
+		GROUP_AT(group_info, i) = (gid_t)group;
+	}
+
+	return 0;
+}
+
+asmlinkage long
+sys32_getgroups16 (int gidsetsize, short __user *grouplist)
+{
+	int i;
+
+	if (gidsetsize < 0)
+		return -EINVAL;
+
+	get_group_info(current->group_info);
+	i = current->group_info->ngroups;
+	if (gidsetsize) {
+		if (i > gidsetsize) {
+			i = -EINVAL;
+			goto out;
+		}
+		if (groups16_to_user(grouplist, current->group_info)) {
+			i = -EFAULT;
+			goto out;
+		}
+	}
+out:
+	put_group_info(current->group_info);
+	return i;
+}
+
+asmlinkage long
+sys32_setgroups16 (int gidsetsize, short __user *grouplist)
+{
+	struct group_info *group_info;
+	int retval;
+
+	if (!capable(CAP_SETGID))
+		return -EPERM;
+	if ((unsigned)gidsetsize > NGROUPS_MAX)
+		return -EINVAL;
+
+	group_info = groups_alloc(gidsetsize);
+	if (!group_info)
+		return -ENOMEM;
+	retval = groups16_from_user(group_info, grouplist);
+	if (retval) {
+		put_group_info(group_info);
+		return retval;
+	}
+
+	retval = set_current_groups(group_info);
+	put_group_info(group_info);
+
+	return retval;
+}
+
+asmlinkage long
+sys32_truncate64 (unsigned int path, unsigned int len_lo, unsigned int len_hi)
+{
+	return sys_truncate(compat_ptr(path), ((unsigned long) len_hi << 32) | len_lo);
+}
+
+asmlinkage long
+sys32_ftruncate64 (int fd, unsigned int len_lo, unsigned int len_hi)
+{
+	return sys_ftruncate(fd, ((unsigned long) len_hi << 32) | len_lo);
+}
+
+static int
+putstat64 (struct stat64 __user *ubuf, struct kstat *kbuf)
+{
+	int err;
+	u64 hdev;
+
+	if (clear_user(ubuf, sizeof(*ubuf)))
+		return -EFAULT;
+
+	hdev = huge_encode_dev(kbuf->dev);
+	err  = __put_user(hdev, (u32 __user*)&ubuf->st_dev);
+	err |= __put_user(hdev >> 32, ((u32 __user*)&ubuf->st_dev) + 1);
+	err |= __put_user(kbuf->ino, &ubuf->__st_ino);
+	err |= __put_user(kbuf->ino, &ubuf->st_ino_lo);
+	err |= __put_user(kbuf->ino >> 32, &ubuf->st_ino_hi);
+	err |= __put_user(kbuf->mode, &ubuf->st_mode);
+	err |= __put_user(kbuf->nlink, &ubuf->st_nlink);
+	err |= __put_user(kbuf->uid, &ubuf->st_uid);
+	err |= __put_user(kbuf->gid, &ubuf->st_gid);
+	hdev = huge_encode_dev(kbuf->rdev);
+	err  = __put_user(hdev, (u32 __user*)&ubuf->st_rdev);
+	err |= __put_user(hdev >> 32, ((u32 __user*)&ubuf->st_rdev) + 1);
+	err |= __put_user(kbuf->size, &ubuf->st_size_lo);
+	err |= __put_user((kbuf->size >> 32), &ubuf->st_size_hi);
+	err |= __put_user(kbuf->atime.tv_sec, &ubuf->st_atime);
+	err |= __put_user(kbuf->atime.tv_nsec, &ubuf->st_atime_nsec);
+	err |= __put_user(kbuf->mtime.tv_sec, &ubuf->st_mtime);
+	err |= __put_user(kbuf->mtime.tv_nsec, &ubuf->st_mtime_nsec);
+	err |= __put_user(kbuf->ctime.tv_sec, &ubuf->st_ctime);
+	err |= __put_user(kbuf->ctime.tv_nsec, &ubuf->st_ctime_nsec);
+	err |= __put_user(kbuf->blksize, &ubuf->st_blksize);
+	err |= __put_user(kbuf->blocks, &ubuf->st_blocks);
+	return err;
+}
+
+asmlinkage long
+sys32_stat64 (char __user *filename, struct stat64 __user *statbuf)
+{
+	struct kstat s;
+	long ret = vfs_stat(filename, &s);
+	if (!ret)
+		ret = putstat64(statbuf, &s);
+	return ret;
+}
+
+asmlinkage long
+sys32_lstat64 (char __user *filename, struct stat64 __user *statbuf)
+{
+	struct kstat s;
+	long ret = vfs_lstat(filename, &s);
+	if (!ret)
+		ret = putstat64(statbuf, &s);
+	return ret;
+}
+
+asmlinkage long
+sys32_fstat64 (unsigned int fd, struct stat64 __user *statbuf)
+{
+	struct kstat s;
+	long ret = vfs_fstat(fd, &s);
+	if (!ret)
+		ret = putstat64(statbuf, &s);
+	return ret;
+}
+
+struct sysinfo32 {
+	s32 uptime;
+	u32 loads[3];
+	u32 totalram;
+	u32 freeram;
+	u32 sharedram;
+	u32 bufferram;
+	u32 totalswap;
+	u32 freeswap;
+	u16 procs;
+	u16 pad;
+	u32 totalhigh;
+	u32 freehigh;
+	u32 mem_unit;
+	char _f[8];
+};
+
+asmlinkage long
+sys32_sysinfo (struct sysinfo32 __user *info)
+{
+	struct sysinfo s;
+	long ret, err;
+	int bitcount = 0;
+	mm_segment_t old_fs = get_fs();
+
+	set_fs(KERNEL_DS);
+	ret = sys_sysinfo((struct sysinfo __user *) &s);
+	set_fs(old_fs);
+	/* Check to see if any memory value is too large for 32-bit and
+	 * scale down if needed.
+	 */
+	if ((s.totalram >> 32) || (s.totalswap >> 32)) {
+		while (s.mem_unit < PAGE_SIZE) {
+			s.mem_unit <<= 1;
+			bitcount++;
+		}
+		s.totalram >>= bitcount;
+		s.freeram >>= bitcount;
+		s.sharedram >>= bitcount;
+		s.bufferram >>= bitcount;
+		s.totalswap >>= bitcount;
+		s.freeswap >>= bitcount;
+		s.totalhigh >>= bitcount;
+		s.freehigh >>= bitcount;
+	}
+
+	if (!access_ok(VERIFY_WRITE, info, sizeof(*info)))
+		return -EFAULT;
+
+	err  = __put_user(s.uptime, &info->uptime);
+	err |= __put_user(s.loads[0], &info->loads[0]);
+	err |= __put_user(s.loads[1], &info->loads[1]);
+	err |= __put_user(s.loads[2], &info->loads[2]);
+	err |= __put_user(s.totalram, &info->totalram);
+	err |= __put_user(s.freeram, &info->freeram);
+	err |= __put_user(s.sharedram, &info->sharedram);
+	err |= __put_user(s.bufferram, &info->bufferram);
+	err |= __put_user(s.totalswap, &info->totalswap);
+	err |= __put_user(s.freeswap, &info->freeswap);
+	err |= __put_user(s.procs, &info->procs);
+	err |= __put_user (s.totalhigh, &info->totalhigh);
+	err |= __put_user (s.freehigh, &info->freehigh);
+	err |= __put_user (s.mem_unit, &info->mem_unit);
+	if (err)
+		return -EFAULT;
+	return ret;
+}
+
+asmlinkage long
+sys32_sched_rr_get_interval (pid_t pid, struct compat_timespec __user *interval)
+{
+	mm_segment_t old_fs = get_fs();
+	struct timespec t;
+	long ret;
+
+	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_pread (unsigned int fd, void __user *buf, unsigned int count, u32 pos_lo, u32 pos_hi)
+{
+	return sys_pread64(fd, buf, count, ((unsigned long) pos_hi << 32) | pos_lo);
+}
+
+asmlinkage long
+sys32_pwrite (unsigned int fd, void __user *buf, unsigned int count, u32 pos_lo, u32 pos_hi)
+{
+	return sys_pwrite64(fd, buf, count, ((unsigned long) pos_hi << 32) | pos_lo);
+}
+
+asmlinkage long
+sys32_sendfile (int out_fd, int in_fd, int __user *offset, unsigned int count)
+{
+	mm_segment_t old_fs = get_fs();
+	long 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 (!ret && offset && put_user(of, offset))
+		return -EFAULT;
+
+	return ret;
+}
+
+asmlinkage long
+sys32_personality (unsigned int personality)
+{
+	long ret;
+
+	if (current->personality == PER_LINUX32 && personality == PER_LINUX)
+		personality = PER_LINUX32;
+	ret = sys_personality(personality);
+	if (ret == PER_LINUX32)
+		ret = PER_LINUX;
+	return ret;
+}
+
+asmlinkage unsigned long
+sys32_brk (unsigned int brk)
+{
+	unsigned long ret, obrk;
+	struct mm_struct *mm = current->mm;
+
+	obrk = mm->brk;
+	ret = sys_brk(brk);
+	if (ret < obrk)
+		clear_user(compat_ptr(ret), PAGE_ALIGN(ret) - ret);
+	return ret;
+}
+
+/*
+ * Exactly like fs/open.c:sys_open(), except that it doesn't set the O_LARGEFILE flag.
+ */
+asmlinkage long
+sys32_open (const char __user * filename, int flags, int mode)
+{
+	char * tmp;
+	int fd, error;
+
+	tmp = getname(filename);
+	fd = PTR_ERR(tmp);
+	if (!IS_ERR(tmp)) {
+		fd = get_unused_fd();
+		if (fd >= 0) {
+			struct file *f = filp_open(tmp, flags, mode);
+			error = PTR_ERR(f);
+			if (IS_ERR(f))
+				goto out_error;
+			fd_install(fd, f);
+		}
+out:
+		putname(tmp);
+	}
+	return fd;
+
+out_error:
+	put_unused_fd(fd);
+	fd = error;
+	goto out;
+}
+
+/* Structure for ia32 emulation on ia64 */
+struct epoll_event32
+{
+	u32 events;
+	u32 data[2];
+};
+
+asmlinkage long
+sys32_epoll_ctl(int epfd, int op, int fd, struct epoll_event32 __user *event)
+{
+	mm_segment_t old_fs = get_fs();
+	struct epoll_event event64;
+	int error;
+	u32 data_halfword;
+
+	if (!access_ok(VERIFY_READ, event, sizeof(struct epoll_event32)))
+		return -EFAULT;
+
+	__get_user(event64.events, &event->events);
+	__get_user(data_halfword, &event->data[0]);
+	event64.data = data_halfword;
+	__get_user(data_halfword, &event->data[1]);
+ 	event64.data |= (u64)data_halfword << 32;
+
+	set_fs(KERNEL_DS);
+	error = sys_epoll_ctl(epfd, op, fd, (struct epoll_event __user *) &event64);
+	set_fs(old_fs);
+
+	return error;
+}
+
+asmlinkage long
+sys32_epoll_wait(int epfd, struct epoll_event32 __user * events, int maxevents,
+		 int timeout)
+{
+	struct epoll_event *events64 = NULL;
+	mm_segment_t old_fs = get_fs();
+	int error, numevents, size;
+	int evt_idx;
+	int do_free_pages = 0;
+
+	if (maxevents <= 0) {
+		return -EINVAL;
+	}
+
+	/* Verify that the area passed by the user is writeable */
+	if (!access_ok(VERIFY_WRITE, events, maxevents * sizeof(struct epoll_event32)))
+		return -EFAULT;
+
+	/*
+ 	 * Allocate space for the intermediate copy.  If the space needed
+	 * is large enough to cause kmalloc to fail, then try again with
+	 * __get_free_pages.
+	 */
+	size = maxevents * sizeof(struct epoll_event);
+	events64 = kmalloc(size, GFP_KERNEL);
+	if (events64 == NULL) {
+		events64 = (struct epoll_event *)
+				__get_free_pages(GFP_KERNEL, get_order(size));
+		if (events64 == NULL)
+			return -ENOMEM;
+		do_free_pages = 1;
+	}
+
+	/* Do the system call */
+	set_fs(KERNEL_DS); /* copy_to/from_user should work on kernel mem*/
+	numevents = sys_epoll_wait(epfd, (struct epoll_event __user *) events64,
+				   maxevents, timeout);
+	set_fs(old_fs);
+
+	/* Don't modify userspace memory if we're returning an error */
+	if (numevents > 0) {
+		/* Translate the 64-bit structures back into the 32-bit
+		   structures */
+		for (evt_idx = 0; evt_idx < numevents; evt_idx++) {
+			__put_user(events64[evt_idx].events,
+				   &events[evt_idx].events);
+			__put_user((u32)events64[evt_idx].data,
+				   &events[evt_idx].data[0]);
+			__put_user((u32)(events64[evt_idx].data >> 32),
+				   &events[evt_idx].data[1]);
+		}
+	}
+
+	if (do_free_pages)
+		free_pages((unsigned long) events64, get_order(size));
+	else
+		kfree(events64);
+	return numevents;
+}
+
+/*
+ * 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(t->tls_array + idx))
+			return idx + GDT_ENTRY_TLS_MIN;
+	return -ESRCH;
+}
+
+/*
+ * Set a given TLS descriptor:
+ */
+asmlinkage int
+sys32_set_thread_area (struct ia32_user_desc __user *u_info)
+{
+	struct thread_struct *t = &current->thread;
+	struct ia32_user_desc info;
+	struct 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 = t->tls_array + idx - GDT_ENTRY_TLS_MIN;
+
+	cpu = smp_processor_id();
+
+	if (LDT_empty(&info)) {
+		desc->a = 0;
+		desc->b = 0;
+	} else {
+		desc->a = LDT_entry_a(&info);
+		desc->b = LDT_entry_b(&info);
+	}
+	load_TLS(t, cpu);
+	return 0;
+}
+
+/*
+ * 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)
+
+asmlinkage int
+sys32_get_thread_area (struct ia32_user_desc __user *u_info)
+{
+	struct ia32_user_desc info;
+	struct 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 = current->thread.tls_array + idx - GDT_ENTRY_TLS_MIN;
+
+	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);
+
+	if (copy_to_user(u_info, &info, sizeof(info)))
+		return -EFAULT;
+	return 0;
+}
+
+asmlinkage long
+sys32_timer_create(u32 clock, struct compat_sigevent __user *se32, timer_t __user *timer_id)
+{
+	struct sigevent se;
+	mm_segment_t oldfs;
+	timer_t t;
+	long err;
+
+	if (se32 == NULL)
+		return sys_timer_create(clock, NULL, timer_id);
+
+	if (get_compat_sigevent(&se, se32))
+		return -EFAULT;
+
+	if (!access_ok(VERIFY_WRITE,timer_id,sizeof(timer_t)))
+		return -EFAULT;
+
+	oldfs = get_fs();
+	set_fs(KERNEL_DS);
+	err = sys_timer_create(clock, (struct sigevent __user *) &se, (timer_t __user *) &t);
+	set_fs(oldfs);
+
+	if (!err)
+		err = __put_user (t, timer_id);
+
+	return err;
+}
+
+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); 
+} 
+
+#ifdef	NOTYET  /* UNTESTED FOR IA64 FROM HERE DOWN */
+
+asmlinkage long sys32_setreuid(compat_uid_t ruid, compat_uid_t euid)
+{
+	uid_t sruid, seuid;
+
+	sruid = (ruid == (compat_uid_t)-1) ? ((uid_t)-1) : ((uid_t)ruid);
+	seuid = (euid == (compat_uid_t)-1) ? ((uid_t)-1) : ((uid_t)euid);
+	return sys_setreuid(sruid, seuid);
+}
+
+asmlinkage long
+sys32_setresuid(compat_uid_t ruid, compat_uid_t euid,
+		compat_uid_t suid)
+{
+	uid_t sruid, seuid, ssuid;
+
+	sruid = (ruid == (compat_uid_t)-1) ? ((uid_t)-1) : ((uid_t)ruid);
+	seuid = (euid == (compat_uid_t)-1) ? ((uid_t)-1) : ((uid_t)euid);
+	ssuid = (suid == (compat_uid_t)-1) ? ((uid_t)-1) : ((uid_t)suid);
+	return sys_setresuid(sruid, seuid, ssuid);
+}
+
+asmlinkage long
+sys32_setregid(compat_gid_t rgid, compat_gid_t egid)
+{
+	gid_t srgid, segid;
+
+	srgid = (rgid == (compat_gid_t)-1) ? ((gid_t)-1) : ((gid_t)rgid);
+	segid = (egid == (compat_gid_t)-1) ? ((gid_t)-1) : ((gid_t)egid);
+	return sys_setregid(srgid, segid);
+}
+
+asmlinkage long
+sys32_setresgid(compat_gid_t rgid, compat_gid_t egid,
+		compat_gid_t sgid)
+{
+	gid_t srgid, segid, ssgid;
+
+	srgid = (rgid == (compat_gid_t)-1) ? ((gid_t)-1) : ((gid_t)rgid);
+	segid = (egid == (compat_gid_t)-1) ? ((gid_t)-1) : ((gid_t)egid);
+	ssgid = (sgid == (compat_gid_t)-1) ? ((gid_t)-1) : ((gid_t)sgid);
+	return sys_setresgid(srgid, segid, ssgid);
+}
+
+/* Handle adjtimex compatibility. */
+
+struct timex32 {
+	u32 modes;
+	s32 offset, freq, maxerror, esterror;
+	s32 status, constant, precision, tolerance;
+	struct compat_timeval time;
+	s32 tick;
+	s32 ppsfreq, jitter, shift, stabil;
+	s32 jitcnt, calcnt, errcnt, stbcnt;
+	s32  :32; s32  :32; s32  :32; s32  :32;
+	s32  :32; s32  :32; s32  :32; s32  :32;
+	s32  :32; s32  :32; s32  :32; s32  :32;
+};
+
+extern int do_adjtimex(struct timex *);
+
+asmlinkage long
+sys32_adjtimex(struct timex32 *utp)
+{
+	struct timex txc;
+	int ret;
+
+	memset(&txc, 0, sizeof(struct timex));
+
+	if(get_user(txc.modes, &utp->modes) ||
+	   __get_user(txc.offset, &utp->offset) ||
+	   __get_user(txc.freq, &utp->freq) ||
+	   __get_user(txc.maxerror, &utp->maxerror) ||
+	   __get_user(txc.esterror, &utp->esterror) ||
+	   __get_user(txc.status, &utp->status) ||
+	   __get_user(txc.constant, &utp->constant) ||
+	   __get_user(txc.precision, &utp->precision) ||
+	   __get_user(txc.tolerance, &utp->tolerance) ||
+	   __get_user(txc.time.tv_sec, &utp->time.tv_sec) ||
+	   __get_user(txc.time.tv_usec, &utp->time.tv_usec) ||
+	   __get_user(txc.tick, &utp->tick) ||
+	   __get_user(txc.ppsfreq, &utp->ppsfreq) ||
+	   __get_user(txc.jitter, &utp->jitter) ||
+	   __get_user(txc.shift, &utp->shift) ||
+	   __get_user(txc.stabil, &utp->stabil) ||
+	   __get_user(txc.jitcnt, &utp->jitcnt) ||
+	   __get_user(txc.calcnt, &utp->calcnt) ||
+	   __get_user(txc.errcnt, &utp->errcnt) ||
+	   __get_user(txc.stbcnt, &utp->stbcnt))
+		return -EFAULT;
+
+	ret = do_adjtimex(&txc);
+
+	if(put_user(txc.modes, &utp->modes) ||
+	   __put_user(txc.offset, &utp->offset) ||
+	   __put_user(txc.freq, &utp->freq) ||
+	   __put_user(txc.maxerror, &utp->maxerror) ||
+	   __put_user(txc.esterror, &utp->esterror) ||
+	   __put_user(txc.status, &utp->status) ||
+	   __put_user(txc.constant, &utp->constant) ||
+	   __put_user(txc.precision, &utp->precision) ||
+	   __put_user(txc.tolerance, &utp->tolerance) ||
+	   __put_user(txc.time.tv_sec, &utp->time.tv_sec) ||
+	   __put_user(txc.time.tv_usec, &utp->time.tv_usec) ||
+	   __put_user(txc.tick, &utp->tick) ||
+	   __put_user(txc.ppsfreq, &utp->ppsfreq) ||
+	   __put_user(txc.jitter, &utp->jitter) ||
+	   __put_user(txc.shift, &utp->shift) ||
+	   __put_user(txc.stabil, &utp->stabil) ||
+	   __put_user(txc.jitcnt, &utp->jitcnt) ||
+	   __put_user(txc.calcnt, &utp->calcnt) ||
+	   __put_user(txc.errcnt, &utp->errcnt) ||
+	   __put_user(txc.stbcnt, &utp->stbcnt))
+		ret = -EFAULT;
+
+	return ret;
+}
+#endif /* NOTYET */