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Diffstat (limited to 'arch/ia64/ia32/sys_ia32.c')
-rw-r--r--arch/ia64/ia32/sys_ia32.c2747
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 000000000000..247a21c64aea
--- /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 */