diff options
Diffstat (limited to 'arch/ia64/ia32/sys_ia32.c')
| -rw-r--r-- | arch/ia64/ia32/sys_ia32.c | 2592 |
1 files changed, 0 insertions, 2592 deletions
diff --git a/arch/ia64/ia32/sys_ia32.c b/arch/ia64/ia32/sys_ia32.c deleted file mode 100644 index bddbd22706e..00000000000 --- a/arch/ia64/ia32/sys_ia32.c +++ /dev/null @@ -1,2592 +0,0 @@ -/* - * 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/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/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/syscalls.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/capability.h> -#include <linux/compat.h> -#include <linux/vfs.h> -#include <linux/mman.h> -#include <linux/mutex.h> - -#include <asm/intrinsics.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 DEFINE_MUTEX(ia32_mmap_mutex); - -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(¤t->mm->mmap_sem); - { - ret = do_mmap(NULL, PAGE_START(start), PAGE_SIZE, prot | PROT_WRITE, - flags | MAP_FIXED | MAP_ANONYMOUS, 0); - } - up_write(¤t->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(¤t->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(¤t->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(¤t->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(¤t->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(¤t->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(¤t->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(¤t->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(¤t->mm->mmap_sem); - { - retval = __ia32_copy_pp_list(p->thread.ppl); - } - up_write(¤t->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(¤t->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(¤t->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 - mutex_lock(&ia32_mmap_mutex); - { - addr = emulate_mmap(file, addr, len, prot, flags, offset); - } - mutex_unlock(&ia32_mmap_mutex); -#else - down_write(¤t->mm->mmap_sem); - { - addr = do_mmap(file, addr, len, prot, flags, offset); - } - up_write(¤t->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; - - mutex_lock(&ia32_mmap_mutex); - ret = sys_munmap(start, end - start); - mutex_unlock(&ia32_mmap_mutex); -#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; - - mutex_lock(&ia32_mmap_mutex); - { - 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: - mutex_unlock(&ia32_mmap_mutex); - 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; - - mutex_lock(&ia32_mmap_mutex); - ret = sys_mremap(addr, old_len, new_len, flags, new_addr); - mutex_unlock(&ia32_mmap_mutex); - - 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) -{ - return alarm_setitimer(seconds); -} - -/* Translations due to time_t size differences. Which affects all - sorts of things, like timeval and itimerval. */ - -extern struct timezone sys_tz; - -asmlinkage long -sys32_gettimeofday (struct compat_timeval __user *tv, struct timezone __user *tz) -{ - if (tv) { - struct timeval ktv; - do_gettimeofday(&ktv); - if (put_tv32(tv, &ktv)) - return -EFAULT; - } - if (tz) { - if (copy_to_user(tz, &sys_tz, sizeof(sys_tz))) - return -EFAULT; - } - return 0; -} - -asmlinkage long -sys32_settimeofday (struct compat_timeval __user *tv, struct timezone __user *tz) -{ - struct timeval ktv; - struct timespec kts; - struct timezone ktz; - - if (tv) { - if (get_tv32(&ktv, tv)) - return -EFAULT; - kts.tv_sec = ktv.tv_sec; - kts.tv_nsec = ktv.tv_usec * 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 = task_pt_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 = task_pt_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 = task_pt_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 = task_pt_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 = task_pt_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 = task_pt_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 = ptrace_traceme(); - goto out; - } - - child = ptrace_get_task_struct(pid); - if (IS_ERR(child)) { - ret = PTR_ERR(child); - goto out; - } - - 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_SYSCALL -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 (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; -} - -/* 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 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 = ¤t->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 = ¤t->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; -} - -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); -} -#endif /* NOTYET */ |