diff options
Diffstat (limited to 'arch/ia64/ia32/sys_ia32.c')
| -rw-r--r-- | arch/ia64/ia32/sys_ia32.c | 2747 |
1 files changed, 2747 insertions, 0 deletions
diff --git a/arch/ia64/ia32/sys_ia32.c b/arch/ia64/ia32/sys_ia32.c new file mode 100644 index 00000000000..247a21c64ae --- /dev/null +++ b/arch/ia64/ia32/sys_ia32.c @@ -0,0 +1,2747 @@ +/* + * sys_ia32.c: Conversion between 32bit and 64bit native syscalls. Derived from sys_sparc32.c. + * + * Copyright (C) 2000 VA Linux Co + * Copyright (C) 2000 Don Dugger <n0ano@valinux.com> + * Copyright (C) 1999 Arun Sharma <arun.sharma@intel.com> + * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz) + * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu) + * Copyright (C) 2000-2003, 2005 Hewlett-Packard Co + * David Mosberger-Tang <davidm@hpl.hp.com> + * Copyright (C) 2004 Gordon Jin <gordon.jin@intel.com> + * + * These routines maintain argument size conversion between 32bit and 64bit + * environment. + */ + +#include <linux/config.h> +#include <linux/kernel.h> +#include <linux/syscalls.h> +#include <linux/sysctl.h> +#include <linux/sched.h> +#include <linux/fs.h> +#include <linux/file.h> +#include <linux/signal.h> +#include <linux/resource.h> +#include <linux/times.h> +#include <linux/utsname.h> +#include <linux/timex.h> +#include <linux/smp.h> +#include <linux/smp_lock.h> +#include <linux/sem.h> +#include <linux/msg.h> +#include <linux/mm.h> +#include <linux/shm.h> +#include <linux/slab.h> +#include <linux/uio.h> +#include <linux/nfs_fs.h> +#include <linux/quota.h> +#include <linux/sunrpc/svc.h> +#include <linux/nfsd/nfsd.h> +#include <linux/nfsd/cache.h> +#include <linux/nfsd/xdr.h> +#include <linux/nfsd/syscall.h> +#include <linux/poll.h> +#include <linux/eventpoll.h> +#include <linux/personality.h> +#include <linux/ptrace.h> +#include <linux/stat.h> +#include <linux/ipc.h> +#include <linux/compat.h> +#include <linux/vfs.h> +#include <linux/mman.h> + +#include <asm/intrinsics.h> +#include <asm/semaphore.h> +#include <asm/types.h> +#include <asm/uaccess.h> +#include <asm/unistd.h> + +#include "ia32priv.h" + +#include <net/scm.h> +#include <net/sock.h> + +#define DEBUG 0 + +#if DEBUG +# define DBG(fmt...) printk(KERN_DEBUG fmt) +#else +# define DBG(fmt...) +#endif + +#define ROUND_UP(x,a) ((__typeof__(x))(((unsigned long)(x) + ((a) - 1)) & ~((a) - 1))) + +#define OFFSET4K(a) ((a) & 0xfff) +#define PAGE_START(addr) ((addr) & PAGE_MASK) +#define MINSIGSTKSZ_IA32 2048 + +#define high2lowuid(uid) ((uid) > 65535 ? 65534 : (uid)) +#define high2lowgid(gid) ((gid) > 65535 ? 65534 : (gid)) + +/* + * Anything that modifies or inspects ia32 user virtual memory must hold this semaphore + * while doing so. + */ +/* XXX make per-mm: */ +static DECLARE_MUTEX(ia32_mmap_sem); + +asmlinkage long +sys32_execve (char __user *name, compat_uptr_t __user *argv, compat_uptr_t __user *envp, + struct pt_regs *regs) +{ + long error; + char *filename; + unsigned long old_map_base, old_task_size, tssd; + + filename = getname(name); + error = PTR_ERR(filename); + if (IS_ERR(filename)) + return error; + + old_map_base = current->thread.map_base; + old_task_size = current->thread.task_size; + tssd = ia64_get_kr(IA64_KR_TSSD); + + /* we may be exec'ing a 64-bit process: reset map base, task-size, and io-base: */ + current->thread.map_base = DEFAULT_MAP_BASE; + current->thread.task_size = DEFAULT_TASK_SIZE; + ia64_set_kr(IA64_KR_IO_BASE, current->thread.old_iob); + ia64_set_kr(IA64_KR_TSSD, current->thread.old_k1); + + error = compat_do_execve(filename, argv, envp, regs); + putname(filename); + + if (error < 0) { + /* oops, execve failed, switch back to old values... */ + ia64_set_kr(IA64_KR_IO_BASE, IA32_IOBASE); + ia64_set_kr(IA64_KR_TSSD, tssd); + current->thread.map_base = old_map_base; + current->thread.task_size = old_task_size; + } + + return error; +} + +int cp_compat_stat(struct kstat *stat, struct compat_stat __user *ubuf) +{ + int err; + + if ((u64) stat->size > MAX_NON_LFS || + !old_valid_dev(stat->dev) || + !old_valid_dev(stat->rdev)) + return -EOVERFLOW; + + if (clear_user(ubuf, sizeof(*ubuf))) + return -EFAULT; + + err = __put_user(old_encode_dev(stat->dev), &ubuf->st_dev); + err |= __put_user(stat->ino, &ubuf->st_ino); + err |= __put_user(stat->mode, &ubuf->st_mode); + err |= __put_user(stat->nlink, &ubuf->st_nlink); + err |= __put_user(high2lowuid(stat->uid), &ubuf->st_uid); + err |= __put_user(high2lowgid(stat->gid), &ubuf->st_gid); + err |= __put_user(old_encode_dev(stat->rdev), &ubuf->st_rdev); + err |= __put_user(stat->size, &ubuf->st_size); + err |= __put_user(stat->atime.tv_sec, &ubuf->st_atime); + err |= __put_user(stat->atime.tv_nsec, &ubuf->st_atime_nsec); + err |= __put_user(stat->mtime.tv_sec, &ubuf->st_mtime); + err |= __put_user(stat->mtime.tv_nsec, &ubuf->st_mtime_nsec); + err |= __put_user(stat->ctime.tv_sec, &ubuf->st_ctime); + err |= __put_user(stat->ctime.tv_nsec, &ubuf->st_ctime_nsec); + err |= __put_user(stat->blksize, &ubuf->st_blksize); + err |= __put_user(stat->blocks, &ubuf->st_blocks); + return err; +} + +#if PAGE_SHIFT > IA32_PAGE_SHIFT + + +static int +get_page_prot (struct vm_area_struct *vma, unsigned long addr) +{ + int prot = 0; + + if (!vma || vma->vm_start > addr) + return 0; + + if (vma->vm_flags & VM_READ) + prot |= PROT_READ; + if (vma->vm_flags & VM_WRITE) + prot |= PROT_WRITE; + if (vma->vm_flags & VM_EXEC) + prot |= PROT_EXEC; + return prot; +} + +/* + * Map a subpage by creating an anonymous page that contains the union of the old page and + * the subpage. + */ +static unsigned long +mmap_subpage (struct file *file, unsigned long start, unsigned long end, int prot, int flags, + loff_t off) +{ + void *page = NULL; + struct inode *inode; + unsigned long ret = 0; + struct vm_area_struct *vma = find_vma(current->mm, start); + int old_prot = get_page_prot(vma, start); + + DBG("mmap_subpage(file=%p,start=0x%lx,end=0x%lx,prot=%x,flags=%x,off=0x%llx)\n", + file, start, end, prot, flags, off); + + + /* Optimize the case where the old mmap and the new mmap are both anonymous */ + if ((old_prot & PROT_WRITE) && (flags & MAP_ANONYMOUS) && !vma->vm_file) { + if (clear_user((void __user *) start, end - start)) { + ret = -EFAULT; + goto out; + } + goto skip_mmap; + } + + page = (void *) get_zeroed_page(GFP_KERNEL); + if (!page) + return -ENOMEM; + + if (old_prot) + copy_from_user(page, (void __user *) PAGE_START(start), PAGE_SIZE); + + down_write(¤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 + down(&ia32_mmap_sem); + { + addr = emulate_mmap(file, addr, len, prot, flags, offset); + } + up(&ia32_mmap_sem); +#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; + + 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 = ¤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; +} + +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 */ |