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-rw-r--r--arch/ia64/ia32/sys_ia32.c2765
1 files changed, 0 insertions, 2765 deletions
diff --git a/arch/ia64/ia32/sys_ia32.c b/arch/ia64/ia32/sys_ia32.c
deleted file mode 100644
index 045b746b9808..000000000000
--- a/arch/ia64/ia32/sys_ia32.c
+++ /dev/null
@@ -1,2765 +0,0 @@
1/*
2 * sys_ia32.c: Conversion between 32bit and 64bit native syscalls. Derived from sys_sparc32.c.
3 *
4 * Copyright (C) 2000 VA Linux Co
5 * Copyright (C) 2000 Don Dugger <n0ano@valinux.com>
6 * Copyright (C) 1999 Arun Sharma <arun.sharma@intel.com>
7 * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
8 * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
9 * Copyright (C) 2000-2003, 2005 Hewlett-Packard Co
10 * David Mosberger-Tang <davidm@hpl.hp.com>
11 * Copyright (C) 2004 Gordon Jin <gordon.jin@intel.com>
12 *
13 * These routines maintain argument size conversion between 32bit and 64bit
14 * environment.
15 */
16
17#include <linux/kernel.h>
18#include <linux/syscalls.h>
19#include <linux/sysctl.h>
20#include <linux/sched.h>
21#include <linux/fs.h>
22#include <linux/file.h>
23#include <linux/signal.h>
24#include <linux/resource.h>
25#include <linux/times.h>
26#include <linux/utsname.h>
27#include <linux/smp.h>
28#include <linux/smp_lock.h>
29#include <linux/sem.h>
30#include <linux/msg.h>
31#include <linux/mm.h>
32#include <linux/shm.h>
33#include <linux/slab.h>
34#include <linux/uio.h>
35#include <linux/socket.h>
36#include <linux/quota.h>
37#include <linux/poll.h>
38#include <linux/eventpoll.h>
39#include <linux/personality.h>
40#include <linux/ptrace.h>
41#include <linux/regset.h>
42#include <linux/stat.h>
43#include <linux/ipc.h>
44#include <linux/capability.h>
45#include <linux/compat.h>
46#include <linux/vfs.h>
47#include <linux/mman.h>
48#include <linux/mutex.h>
49
50#include <asm/intrinsics.h>
51#include <asm/types.h>
52#include <asm/uaccess.h>
53#include <asm/unistd.h>
54
55#include "ia32priv.h"
56
57#include <net/scm.h>
58#include <net/sock.h>
59
60#define DEBUG 0
61
62#if DEBUG
63# define DBG(fmt...) printk(KERN_DEBUG fmt)
64#else
65# define DBG(fmt...)
66#endif
67
68#define ROUND_UP(x,a) ((__typeof__(x))(((unsigned long)(x) + ((a) - 1)) & ~((a) - 1)))
69
70#define OFFSET4K(a) ((a) & 0xfff)
71#define PAGE_START(addr) ((addr) & PAGE_MASK)
72#define MINSIGSTKSZ_IA32 2048
73
74#define high2lowuid(uid) ((uid) > 65535 ? 65534 : (uid))
75#define high2lowgid(gid) ((gid) > 65535 ? 65534 : (gid))
76
77/*
78 * Anything that modifies or inspects ia32 user virtual memory must hold this semaphore
79 * while doing so.
80 */
81/* XXX make per-mm: */
82static DEFINE_MUTEX(ia32_mmap_mutex);
83
84asmlinkage long
85sys32_execve (char __user *name, compat_uptr_t __user *argv, compat_uptr_t __user *envp,
86 struct pt_regs *regs)
87{
88 long error;
89 char *filename;
90 unsigned long old_map_base, old_task_size, tssd;
91
92 filename = getname(name);
93 error = PTR_ERR(filename);
94 if (IS_ERR(filename))
95 return error;
96
97 old_map_base = current->thread.map_base;
98 old_task_size = current->thread.task_size;
99 tssd = ia64_get_kr(IA64_KR_TSSD);
100
101 /* we may be exec'ing a 64-bit process: reset map base, task-size, and io-base: */
102 current->thread.map_base = DEFAULT_MAP_BASE;
103 current->thread.task_size = DEFAULT_TASK_SIZE;
104 ia64_set_kr(IA64_KR_IO_BASE, current->thread.old_iob);
105 ia64_set_kr(IA64_KR_TSSD, current->thread.old_k1);
106
107 error = compat_do_execve(filename, argv, envp, regs);
108 putname(filename);
109
110 if (error < 0) {
111 /* oops, execve failed, switch back to old values... */
112 ia64_set_kr(IA64_KR_IO_BASE, IA32_IOBASE);
113 ia64_set_kr(IA64_KR_TSSD, tssd);
114 current->thread.map_base = old_map_base;
115 current->thread.task_size = old_task_size;
116 }
117
118 return error;
119}
120
121
122#if PAGE_SHIFT > IA32_PAGE_SHIFT
123
124
125static int
126get_page_prot (struct vm_area_struct *vma, unsigned long addr)
127{
128 int prot = 0;
129
130 if (!vma || vma->vm_start > addr)
131 return 0;
132
133 if (vma->vm_flags & VM_READ)
134 prot |= PROT_READ;
135 if (vma->vm_flags & VM_WRITE)
136 prot |= PROT_WRITE;
137 if (vma->vm_flags & VM_EXEC)
138 prot |= PROT_EXEC;
139 return prot;
140}
141
142/*
143 * Map a subpage by creating an anonymous page that contains the union of the old page and
144 * the subpage.
145 */
146static unsigned long
147mmap_subpage (struct file *file, unsigned long start, unsigned long end, int prot, int flags,
148 loff_t off)
149{
150 void *page = NULL;
151 struct inode *inode;
152 unsigned long ret = 0;
153 struct vm_area_struct *vma = find_vma(current->mm, start);
154 int old_prot = get_page_prot(vma, start);
155
156 DBG("mmap_subpage(file=%p,start=0x%lx,end=0x%lx,prot=%x,flags=%x,off=0x%llx)\n",
157 file, start, end, prot, flags, off);
158
159
160 /* Optimize the case where the old mmap and the new mmap are both anonymous */
161 if ((old_prot & PROT_WRITE) && (flags & MAP_ANONYMOUS) && !vma->vm_file) {
162 if (clear_user((void __user *) start, end - start)) {
163 ret = -EFAULT;
164 goto out;
165 }
166 goto skip_mmap;
167 }
168
169 page = (void *) get_zeroed_page(GFP_KERNEL);
170 if (!page)
171 return -ENOMEM;
172
173 if (old_prot)
174 copy_from_user(page, (void __user *) PAGE_START(start), PAGE_SIZE);
175
176 down_write(&current->mm->mmap_sem);
177 {
178 ret = do_mmap(NULL, PAGE_START(start), PAGE_SIZE, prot | PROT_WRITE,
179 flags | MAP_FIXED | MAP_ANONYMOUS, 0);
180 }
181 up_write(&current->mm->mmap_sem);
182
183 if (IS_ERR((void *) ret))
184 goto out;
185
186 if (old_prot) {
187 /* copy back the old page contents. */
188 if (offset_in_page(start))
189 copy_to_user((void __user *) PAGE_START(start), page,
190 offset_in_page(start));
191 if (offset_in_page(end))
192 copy_to_user((void __user *) end, page + offset_in_page(end),
193 PAGE_SIZE - offset_in_page(end));
194 }
195
196 if (!(flags & MAP_ANONYMOUS)) {
197 /* read the file contents */
198 inode = file->f_path.dentry->d_inode;
199 if (!inode->i_fop || !file->f_op->read
200 || ((*file->f_op->read)(file, (char __user *) start, end - start, &off) < 0))
201 {
202 ret = -EINVAL;
203 goto out;
204 }
205 }
206
207 skip_mmap:
208 if (!(prot & PROT_WRITE))
209 ret = sys_mprotect(PAGE_START(start), PAGE_SIZE, prot | old_prot);
210 out:
211 if (page)
212 free_page((unsigned long) page);
213 return ret;
214}
215
216/* SLAB cache for ia64_partial_page structures */
217struct kmem_cache *ia64_partial_page_cachep;
218
219/*
220 * init ia64_partial_page_list.
221 * return 0 means kmalloc fail.
222 */
223struct ia64_partial_page_list*
224ia32_init_pp_list(void)
225{
226 struct ia64_partial_page_list *p;
227
228 if ((p = kmalloc(sizeof(*p), GFP_KERNEL)) == NULL)
229 return p;
230 p->pp_head = NULL;
231 p->ppl_rb = RB_ROOT;
232 p->pp_hint = NULL;
233 atomic_set(&p->pp_count, 1);
234 return p;
235}
236
237/*
238 * Search for the partial page with @start in partial page list @ppl.
239 * If finds the partial page, return the found partial page.
240 * Else, return 0 and provide @pprev, @rb_link, @rb_parent to
241 * be used by later __ia32_insert_pp().
242 */
243static struct ia64_partial_page *
244__ia32_find_pp(struct ia64_partial_page_list *ppl, unsigned int start,
245 struct ia64_partial_page **pprev, struct rb_node ***rb_link,
246 struct rb_node **rb_parent)
247{
248 struct ia64_partial_page *pp;
249 struct rb_node **__rb_link, *__rb_parent, *rb_prev;
250
251 pp = ppl->pp_hint;
252 if (pp && pp->base == start)
253 return pp;
254
255 __rb_link = &ppl->ppl_rb.rb_node;
256 rb_prev = __rb_parent = NULL;
257
258 while (*__rb_link) {
259 __rb_parent = *__rb_link;
260 pp = rb_entry(__rb_parent, struct ia64_partial_page, pp_rb);
261
262 if (pp->base == start) {
263 ppl->pp_hint = pp;
264 return pp;
265 } else if (pp->base < start) {
266 rb_prev = __rb_parent;
267 __rb_link = &__rb_parent->rb_right;
268 } else {
269 __rb_link = &__rb_parent->rb_left;
270 }
271 }
272
273 *rb_link = __rb_link;
274 *rb_parent = __rb_parent;
275 *pprev = NULL;
276 if (rb_prev)
277 *pprev = rb_entry(rb_prev, struct ia64_partial_page, pp_rb);
278 return NULL;
279}
280
281/*
282 * insert @pp into @ppl.
283 */
284static void
285__ia32_insert_pp(struct ia64_partial_page_list *ppl,
286 struct ia64_partial_page *pp, struct ia64_partial_page *prev,
287 struct rb_node **rb_link, struct rb_node *rb_parent)
288{
289 /* link list */
290 if (prev) {
291 pp->next = prev->next;
292 prev->next = pp;
293 } else {
294 ppl->pp_head = pp;
295 if (rb_parent)
296 pp->next = rb_entry(rb_parent,
297 struct ia64_partial_page, pp_rb);
298 else
299 pp->next = NULL;
300 }
301
302 /* link rb */
303 rb_link_node(&pp->pp_rb, rb_parent, rb_link);
304 rb_insert_color(&pp->pp_rb, &ppl->ppl_rb);
305
306 ppl->pp_hint = pp;
307}
308
309/*
310 * delete @pp from partial page list @ppl.
311 */
312static void
313__ia32_delete_pp(struct ia64_partial_page_list *ppl,
314 struct ia64_partial_page *pp, struct ia64_partial_page *prev)
315{
316 if (prev) {
317 prev->next = pp->next;
318 if (ppl->pp_hint == pp)
319 ppl->pp_hint = prev;
320 } else {
321 ppl->pp_head = pp->next;
322 if (ppl->pp_hint == pp)
323 ppl->pp_hint = pp->next;
324 }
325 rb_erase(&pp->pp_rb, &ppl->ppl_rb);
326 kmem_cache_free(ia64_partial_page_cachep, pp);
327}
328
329static struct ia64_partial_page *
330__pp_prev(struct ia64_partial_page *pp)
331{
332 struct rb_node *prev = rb_prev(&pp->pp_rb);
333 if (prev)
334 return rb_entry(prev, struct ia64_partial_page, pp_rb);
335 else
336 return NULL;
337}
338
339/*
340 * Delete partial pages with address between @start and @end.
341 * @start and @end are page aligned.
342 */
343static void
344__ia32_delete_pp_range(unsigned int start, unsigned int end)
345{
346 struct ia64_partial_page *pp, *prev;
347 struct rb_node **rb_link, *rb_parent;
348
349 if (start >= end)
350 return;
351
352 pp = __ia32_find_pp(current->thread.ppl, start, &prev,
353 &rb_link, &rb_parent);
354 if (pp)
355 prev = __pp_prev(pp);
356 else {
357 if (prev)
358 pp = prev->next;
359 else
360 pp = current->thread.ppl->pp_head;
361 }
362
363 while (pp && pp->base < end) {
364 struct ia64_partial_page *tmp = pp->next;
365 __ia32_delete_pp(current->thread.ppl, pp, prev);
366 pp = tmp;
367 }
368}
369
370/*
371 * Set the range between @start and @end in bitmap.
372 * @start and @end should be IA32 page aligned and in the same IA64 page.
373 */
374static int
375__ia32_set_pp(unsigned int start, unsigned int end, int flags)
376{
377 struct ia64_partial_page *pp, *prev;
378 struct rb_node ** rb_link, *rb_parent;
379 unsigned int pstart, start_bit, end_bit, i;
380
381 pstart = PAGE_START(start);
382 start_bit = (start % PAGE_SIZE) / IA32_PAGE_SIZE;
383 end_bit = (end % PAGE_SIZE) / IA32_PAGE_SIZE;
384 if (end_bit == 0)
385 end_bit = PAGE_SIZE / IA32_PAGE_SIZE;
386 pp = __ia32_find_pp(current->thread.ppl, pstart, &prev,
387 &rb_link, &rb_parent);
388 if (pp) {
389 for (i = start_bit; i < end_bit; i++)
390 set_bit(i, &pp->bitmap);
391 /*
392 * Check: if this partial page has been set to a full page,
393 * then delete it.
394 */
395 if (find_first_zero_bit(&pp->bitmap, sizeof(pp->bitmap)*8) >=
396 PAGE_SIZE/IA32_PAGE_SIZE) {
397 __ia32_delete_pp(current->thread.ppl, pp, __pp_prev(pp));
398 }
399 return 0;
400 }
401
402 /*
403 * MAP_FIXED may lead to overlapping mmap.
404 * In this case, the requested mmap area may already mmaped as a full
405 * page. So check vma before adding a new partial page.
406 */
407 if (flags & MAP_FIXED) {
408 struct vm_area_struct *vma = find_vma(current->mm, pstart);
409 if (vma && vma->vm_start <= pstart)
410 return 0;
411 }
412
413 /* new a ia64_partial_page */
414 pp = kmem_cache_alloc(ia64_partial_page_cachep, GFP_KERNEL);
415 if (!pp)
416 return -ENOMEM;
417 pp->base = pstart;
418 pp->bitmap = 0;
419 for (i=start_bit; i<end_bit; i++)
420 set_bit(i, &(pp->bitmap));
421 pp->next = NULL;
422 __ia32_insert_pp(current->thread.ppl, pp, prev, rb_link, rb_parent);
423 return 0;
424}
425
426/*
427 * @start and @end should be IA32 page aligned, but don't need to be in the
428 * same IA64 page. Split @start and @end to make sure they're in the same IA64
429 * page, then call __ia32_set_pp().
430 */
431static void
432ia32_set_pp(unsigned int start, unsigned int end, int flags)
433{
434 down_write(&current->mm->mmap_sem);
435 if (flags & MAP_FIXED) {
436 /*
437 * MAP_FIXED may lead to overlapping mmap. When this happens,
438 * a series of complete IA64 pages results in deletion of
439 * old partial pages in that range.
440 */
441 __ia32_delete_pp_range(PAGE_ALIGN(start), PAGE_START(end));
442 }
443
444 if (end < PAGE_ALIGN(start)) {
445 __ia32_set_pp(start, end, flags);
446 } else {
447 if (offset_in_page(start))
448 __ia32_set_pp(start, PAGE_ALIGN(start), flags);
449 if (offset_in_page(end))
450 __ia32_set_pp(PAGE_START(end), end, flags);
451 }
452 up_write(&current->mm->mmap_sem);
453}
454
455/*
456 * Unset the range between @start and @end in bitmap.
457 * @start and @end should be IA32 page aligned and in the same IA64 page.
458 * After doing that, if the bitmap is 0, then free the page and return 1,
459 * else return 0;
460 * If not find the partial page in the list, then
461 * If the vma exists, then the full page is set to a partial page;
462 * Else return -ENOMEM.
463 */
464static int
465__ia32_unset_pp(unsigned int start, unsigned int end)
466{
467 struct ia64_partial_page *pp, *prev;
468 struct rb_node ** rb_link, *rb_parent;
469 unsigned int pstart, start_bit, end_bit, i;
470 struct vm_area_struct *vma;
471
472 pstart = PAGE_START(start);
473 start_bit = (start % PAGE_SIZE) / IA32_PAGE_SIZE;
474 end_bit = (end % PAGE_SIZE) / IA32_PAGE_SIZE;
475 if (end_bit == 0)
476 end_bit = PAGE_SIZE / IA32_PAGE_SIZE;
477
478 pp = __ia32_find_pp(current->thread.ppl, pstart, &prev,
479 &rb_link, &rb_parent);
480 if (pp) {
481 for (i = start_bit; i < end_bit; i++)
482 clear_bit(i, &pp->bitmap);
483 if (pp->bitmap == 0) {
484 __ia32_delete_pp(current->thread.ppl, pp, __pp_prev(pp));
485 return 1;
486 }
487 return 0;
488 }
489
490 vma = find_vma(current->mm, pstart);
491 if (!vma || vma->vm_start > pstart) {
492 return -ENOMEM;
493 }
494
495 /* new a ia64_partial_page */
496 pp = kmem_cache_alloc(ia64_partial_page_cachep, GFP_KERNEL);
497 if (!pp)
498 return -ENOMEM;
499 pp->base = pstart;
500 pp->bitmap = 0;
501 for (i = 0; i < start_bit; i++)
502 set_bit(i, &(pp->bitmap));
503 for (i = end_bit; i < PAGE_SIZE / IA32_PAGE_SIZE; i++)
504 set_bit(i, &(pp->bitmap));
505 pp->next = NULL;
506 __ia32_insert_pp(current->thread.ppl, pp, prev, rb_link, rb_parent);
507 return 0;
508}
509
510/*
511 * Delete pp between PAGE_ALIGN(start) and PAGE_START(end) by calling
512 * __ia32_delete_pp_range(). Unset possible partial pages by calling
513 * __ia32_unset_pp().
514 * The returned value see __ia32_unset_pp().
515 */
516static int
517ia32_unset_pp(unsigned int *startp, unsigned int *endp)
518{
519 unsigned int start = *startp, end = *endp;
520 int ret = 0;
521
522 down_write(&current->mm->mmap_sem);
523
524 __ia32_delete_pp_range(PAGE_ALIGN(start), PAGE_START(end));
525
526 if (end < PAGE_ALIGN(start)) {
527 ret = __ia32_unset_pp(start, end);
528 if (ret == 1) {
529 *startp = PAGE_START(start);
530 *endp = PAGE_ALIGN(end);
531 }
532 if (ret == 0) {
533 /* to shortcut sys_munmap() in sys32_munmap() */
534 *startp = PAGE_START(start);
535 *endp = PAGE_START(end);
536 }
537 } else {
538 if (offset_in_page(start)) {
539 ret = __ia32_unset_pp(start, PAGE_ALIGN(start));
540 if (ret == 1)
541 *startp = PAGE_START(start);
542 if (ret == 0)
543 *startp = PAGE_ALIGN(start);
544 if (ret < 0)
545 goto out;
546 }
547 if (offset_in_page(end)) {
548 ret = __ia32_unset_pp(PAGE_START(end), end);
549 if (ret == 1)
550 *endp = PAGE_ALIGN(end);
551 if (ret == 0)
552 *endp = PAGE_START(end);
553 }
554 }
555
556 out:
557 up_write(&current->mm->mmap_sem);
558 return ret;
559}
560
561/*
562 * Compare the range between @start and @end with bitmap in partial page.
563 * @start and @end should be IA32 page aligned and in the same IA64 page.
564 */
565static int
566__ia32_compare_pp(unsigned int start, unsigned int end)
567{
568 struct ia64_partial_page *pp, *prev;
569 struct rb_node ** rb_link, *rb_parent;
570 unsigned int pstart, start_bit, end_bit, size;
571 unsigned int first_bit, next_zero_bit; /* the first range in bitmap */
572
573 pstart = PAGE_START(start);
574
575 pp = __ia32_find_pp(current->thread.ppl, pstart, &prev,
576 &rb_link, &rb_parent);
577 if (!pp)
578 return 1;
579
580 start_bit = (start % PAGE_SIZE) / IA32_PAGE_SIZE;
581 end_bit = (end % PAGE_SIZE) / IA32_PAGE_SIZE;
582 size = sizeof(pp->bitmap) * 8;
583 first_bit = find_first_bit(&pp->bitmap, size);
584 next_zero_bit = find_next_zero_bit(&pp->bitmap, size, first_bit);
585 if ((start_bit < first_bit) || (end_bit > next_zero_bit)) {
586 /* exceeds the first range in bitmap */
587 return -ENOMEM;
588 } else if ((start_bit == first_bit) && (end_bit == next_zero_bit)) {
589 first_bit = find_next_bit(&pp->bitmap, size, next_zero_bit);
590 if ((next_zero_bit < first_bit) && (first_bit < size))
591 return 1; /* has next range */
592 else
593 return 0; /* no next range */
594 } else
595 return 1;
596}
597
598/*
599 * @start and @end should be IA32 page aligned, but don't need to be in the
600 * same IA64 page. Split @start and @end to make sure they're in the same IA64
601 * page, then call __ia32_compare_pp().
602 *
603 * Take this as example: the range is the 1st and 2nd 4K page.
604 * Return 0 if they fit bitmap exactly, i.e. bitmap = 00000011;
605 * Return 1 if the range doesn't cover whole bitmap, e.g. bitmap = 00001111;
606 * Return -ENOMEM if the range exceeds the bitmap, e.g. bitmap = 00000001 or
607 * bitmap = 00000101.
608 */
609static int
610ia32_compare_pp(unsigned int *startp, unsigned int *endp)
611{
612 unsigned int start = *startp, end = *endp;
613 int retval = 0;
614
615 down_write(&current->mm->mmap_sem);
616
617 if (end < PAGE_ALIGN(start)) {
618 retval = __ia32_compare_pp(start, end);
619 if (retval == 0) {
620 *startp = PAGE_START(start);
621 *endp = PAGE_ALIGN(end);
622 }
623 } else {
624 if (offset_in_page(start)) {
625 retval = __ia32_compare_pp(start,
626 PAGE_ALIGN(start));
627 if (retval == 0)
628 *startp = PAGE_START(start);
629 if (retval < 0)
630 goto out;
631 }
632 if (offset_in_page(end)) {
633 retval = __ia32_compare_pp(PAGE_START(end), end);
634 if (retval == 0)
635 *endp = PAGE_ALIGN(end);
636 }
637 }
638
639 out:
640 up_write(&current->mm->mmap_sem);
641 return retval;
642}
643
644static void
645__ia32_drop_pp_list(struct ia64_partial_page_list *ppl)
646{
647 struct ia64_partial_page *pp = ppl->pp_head;
648
649 while (pp) {
650 struct ia64_partial_page *next = pp->next;
651 kmem_cache_free(ia64_partial_page_cachep, pp);
652 pp = next;
653 }
654
655 kfree(ppl);
656}
657
658void
659ia32_drop_ia64_partial_page_list(struct task_struct *task)
660{
661 struct ia64_partial_page_list* ppl = task->thread.ppl;
662
663 if (ppl && atomic_dec_and_test(&ppl->pp_count))
664 __ia32_drop_pp_list(ppl);
665}
666
667/*
668 * Copy current->thread.ppl to ppl (already initialized).
669 */
670static int
671__ia32_copy_pp_list(struct ia64_partial_page_list *ppl)
672{
673 struct ia64_partial_page *pp, *tmp, *prev;
674 struct rb_node **rb_link, *rb_parent;
675
676 ppl->pp_head = NULL;
677 ppl->pp_hint = NULL;
678 ppl->ppl_rb = RB_ROOT;
679 rb_link = &ppl->ppl_rb.rb_node;
680 rb_parent = NULL;
681 prev = NULL;
682
683 for (pp = current->thread.ppl->pp_head; pp; pp = pp->next) {
684 tmp = kmem_cache_alloc(ia64_partial_page_cachep, GFP_KERNEL);
685 if (!tmp)
686 return -ENOMEM;
687 *tmp = *pp;
688 __ia32_insert_pp(ppl, tmp, prev, rb_link, rb_parent);
689 prev = tmp;
690 rb_link = &tmp->pp_rb.rb_right;
691 rb_parent = &tmp->pp_rb;
692 }
693 return 0;
694}
695
696int
697ia32_copy_ia64_partial_page_list(struct task_struct *p,
698 unsigned long clone_flags)
699{
700 int retval = 0;
701
702 if (clone_flags & CLONE_VM) {
703 atomic_inc(&current->thread.ppl->pp_count);
704 p->thread.ppl = current->thread.ppl;
705 } else {
706 p->thread.ppl = ia32_init_pp_list();
707 if (!p->thread.ppl)
708 return -ENOMEM;
709 down_write(&current->mm->mmap_sem);
710 {
711 retval = __ia32_copy_pp_list(p->thread.ppl);
712 }
713 up_write(&current->mm->mmap_sem);
714 }
715
716 return retval;
717}
718
719static unsigned long
720emulate_mmap (struct file *file, unsigned long start, unsigned long len, int prot, int flags,
721 loff_t off)
722{
723 unsigned long tmp, end, pend, pstart, ret, is_congruent, fudge = 0;
724 struct inode *inode;
725 loff_t poff;
726
727 end = start + len;
728 pstart = PAGE_START(start);
729 pend = PAGE_ALIGN(end);
730
731 if (flags & MAP_FIXED) {
732 ia32_set_pp((unsigned int)start, (unsigned int)end, flags);
733 if (start > pstart) {
734 if (flags & MAP_SHARED)
735 printk(KERN_INFO
736 "%s(%d): emulate_mmap() can't share head (addr=0x%lx)\n",
737 current->comm, task_pid_nr(current), start);
738 ret = mmap_subpage(file, start, min(PAGE_ALIGN(start), end), prot, flags,
739 off);
740 if (IS_ERR((void *) ret))
741 return ret;
742 pstart += PAGE_SIZE;
743 if (pstart >= pend)
744 goto out; /* done */
745 }
746 if (end < pend) {
747 if (flags & MAP_SHARED)
748 printk(KERN_INFO
749 "%s(%d): emulate_mmap() can't share tail (end=0x%lx)\n",
750 current->comm, task_pid_nr(current), end);
751 ret = mmap_subpage(file, max(start, PAGE_START(end)), end, prot, flags,
752 (off + len) - offset_in_page(end));
753 if (IS_ERR((void *) ret))
754 return ret;
755 pend -= PAGE_SIZE;
756 if (pstart >= pend)
757 goto out; /* done */
758 }
759 } else {
760 /*
761 * If a start address was specified, use it if the entire rounded out area
762 * is available.
763 */
764 if (start && !pstart)
765 fudge = 1; /* handle case of mapping to range (0,PAGE_SIZE) */
766 tmp = arch_get_unmapped_area(file, pstart - fudge, pend - pstart, 0, flags);
767 if (tmp != pstart) {
768 pstart = tmp;
769 start = pstart + offset_in_page(off); /* make start congruent with off */
770 end = start + len;
771 pend = PAGE_ALIGN(end);
772 }
773 }
774
775 poff = off + (pstart - start); /* note: (pstart - start) may be negative */
776 is_congruent = (flags & MAP_ANONYMOUS) || (offset_in_page(poff) == 0);
777
778 if ((flags & MAP_SHARED) && !is_congruent)
779 printk(KERN_INFO "%s(%d): emulate_mmap() can't share contents of incongruent mmap "
780 "(addr=0x%lx,off=0x%llx)\n", current->comm, task_pid_nr(current), start, off);
781
782 DBG("mmap_body: mapping [0x%lx-0x%lx) %s with poff 0x%llx\n", pstart, pend,
783 is_congruent ? "congruent" : "not congruent", poff);
784
785 down_write(&current->mm->mmap_sem);
786 {
787 if (!(flags & MAP_ANONYMOUS) && is_congruent)
788 ret = do_mmap(file, pstart, pend - pstart, prot, flags | MAP_FIXED, poff);
789 else
790 ret = do_mmap(NULL, pstart, pend - pstart,
791 prot | ((flags & MAP_ANONYMOUS) ? 0 : PROT_WRITE),
792 flags | MAP_FIXED | MAP_ANONYMOUS, 0);
793 }
794 up_write(&current->mm->mmap_sem);
795
796 if (IS_ERR((void *) ret))
797 return ret;
798
799 if (!is_congruent) {
800 /* read the file contents */
801 inode = file->f_path.dentry->d_inode;
802 if (!inode->i_fop || !file->f_op->read
803 || ((*file->f_op->read)(file, (char __user *) pstart, pend - pstart, &poff)
804 < 0))
805 {
806 sys_munmap(pstart, pend - pstart);
807 return -EINVAL;
808 }
809 if (!(prot & PROT_WRITE) && sys_mprotect(pstart, pend - pstart, prot) < 0)
810 return -EINVAL;
811 }
812
813 if (!(flags & MAP_FIXED))
814 ia32_set_pp((unsigned int)start, (unsigned int)end, flags);
815out:
816 return start;
817}
818
819#endif /* PAGE_SHIFT > IA32_PAGE_SHIFT */
820
821static inline unsigned int
822get_prot32 (unsigned int prot)
823{
824 if (prot & PROT_WRITE)
825 /* on x86, PROT_WRITE implies PROT_READ which implies PROT_EEC */
826 prot |= PROT_READ | PROT_WRITE | PROT_EXEC;
827 else if (prot & (PROT_READ | PROT_EXEC))
828 /* on x86, there is no distinction between PROT_READ and PROT_EXEC */
829 prot |= (PROT_READ | PROT_EXEC);
830
831 return prot;
832}
833
834unsigned long
835ia32_do_mmap (struct file *file, unsigned long addr, unsigned long len, int prot, int flags,
836 loff_t offset)
837{
838 DBG("ia32_do_mmap(file=%p,addr=0x%lx,len=0x%lx,prot=%x,flags=%x,offset=0x%llx)\n",
839 file, addr, len, prot, flags, offset);
840
841 if (file && (!file->f_op || !file->f_op->mmap))
842 return -ENODEV;
843
844 len = IA32_PAGE_ALIGN(len);
845 if (len == 0)
846 return addr;
847
848 if (len > IA32_PAGE_OFFSET || addr > IA32_PAGE_OFFSET - len)
849 {
850 if (flags & MAP_FIXED)
851 return -ENOMEM;
852 else
853 return -EINVAL;
854 }
855
856 if (OFFSET4K(offset))
857 return -EINVAL;
858
859 prot = get_prot32(prot);
860
861 if (flags & MAP_HUGETLB)
862 return -ENOMEM;
863
864#if PAGE_SHIFT > IA32_PAGE_SHIFT
865 mutex_lock(&ia32_mmap_mutex);
866 {
867 addr = emulate_mmap(file, addr, len, prot, flags, offset);
868 }
869 mutex_unlock(&ia32_mmap_mutex);
870#else
871 down_write(&current->mm->mmap_sem);
872 {
873 addr = do_mmap(file, addr, len, prot, flags, offset);
874 }
875 up_write(&current->mm->mmap_sem);
876#endif
877 DBG("ia32_do_mmap: returning 0x%lx\n", addr);
878 return addr;
879}
880
881/*
882 * Linux/i386 didn't use to be able to handle more than 4 system call parameters, so these
883 * system calls used a memory block for parameter passing..
884 */
885
886struct mmap_arg_struct {
887 unsigned int addr;
888 unsigned int len;
889 unsigned int prot;
890 unsigned int flags;
891 unsigned int fd;
892 unsigned int offset;
893};
894
895asmlinkage long
896sys32_mmap (struct mmap_arg_struct __user *arg)
897{
898 struct mmap_arg_struct a;
899 struct file *file = NULL;
900 unsigned long addr;
901 int flags;
902
903 if (copy_from_user(&a, arg, sizeof(a)))
904 return -EFAULT;
905
906 if (OFFSET4K(a.offset))
907 return -EINVAL;
908
909 flags = a.flags;
910
911 flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
912 if (!(flags & MAP_ANONYMOUS)) {
913 file = fget(a.fd);
914 if (!file)
915 return -EBADF;
916 }
917
918 addr = ia32_do_mmap(file, a.addr, a.len, a.prot, flags, a.offset);
919
920 if (file)
921 fput(file);
922 return addr;
923}
924
925asmlinkage long
926sys32_mmap2 (unsigned int addr, unsigned int len, unsigned int prot, unsigned int flags,
927 unsigned int fd, unsigned int pgoff)
928{
929 struct file *file = NULL;
930 unsigned long retval;
931
932 flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
933 if (!(flags & MAP_ANONYMOUS)) {
934 file = fget(fd);
935 if (!file)
936 return -EBADF;
937 }
938
939 retval = ia32_do_mmap(file, addr, len, prot, flags,
940 (unsigned long) pgoff << IA32_PAGE_SHIFT);
941
942 if (file)
943 fput(file);
944 return retval;
945}
946
947asmlinkage long
948sys32_munmap (unsigned int start, unsigned int len)
949{
950 unsigned int end = start + len;
951 long ret;
952
953#if PAGE_SHIFT <= IA32_PAGE_SHIFT
954 ret = sys_munmap(start, end - start);
955#else
956 if (OFFSET4K(start))
957 return -EINVAL;
958
959 end = IA32_PAGE_ALIGN(end);
960 if (start >= end)
961 return -EINVAL;
962
963 ret = ia32_unset_pp(&start, &end);
964 if (ret < 0)
965 return ret;
966
967 if (start >= end)
968 return 0;
969
970 mutex_lock(&ia32_mmap_mutex);
971 ret = sys_munmap(start, end - start);
972 mutex_unlock(&ia32_mmap_mutex);
973#endif
974 return ret;
975}
976
977#if PAGE_SHIFT > IA32_PAGE_SHIFT
978
979/*
980 * When mprotect()ing a partial page, we set the permission to the union of the old
981 * settings and the new settings. In other words, it's only possible to make access to a
982 * partial page less restrictive.
983 */
984static long
985mprotect_subpage (unsigned long address, int new_prot)
986{
987 int old_prot;
988 struct vm_area_struct *vma;
989
990 if (new_prot == PROT_NONE)
991 return 0; /* optimize case where nothing changes... */
992 vma = find_vma(current->mm, address);
993 old_prot = get_page_prot(vma, address);
994 return sys_mprotect(address, PAGE_SIZE, new_prot | old_prot);
995}
996
997#endif /* PAGE_SHIFT > IA32_PAGE_SHIFT */
998
999asmlinkage long
1000sys32_mprotect (unsigned int start, unsigned int len, int prot)
1001{
1002 unsigned int end = start + len;
1003#if PAGE_SHIFT > IA32_PAGE_SHIFT
1004 long retval = 0;
1005#endif
1006
1007 prot = get_prot32(prot);
1008
1009#if PAGE_SHIFT <= IA32_PAGE_SHIFT
1010 return sys_mprotect(start, end - start, prot);
1011#else
1012 if (OFFSET4K(start))
1013 return -EINVAL;
1014
1015 end = IA32_PAGE_ALIGN(end);
1016 if (end < start)
1017 return -EINVAL;
1018
1019 retval = ia32_compare_pp(&start, &end);
1020
1021 if (retval < 0)
1022 return retval;
1023
1024 mutex_lock(&ia32_mmap_mutex);
1025 {
1026 if (offset_in_page(start)) {
1027 /* start address is 4KB aligned but not page aligned. */
1028 retval = mprotect_subpage(PAGE_START(start), prot);
1029 if (retval < 0)
1030 goto out;
1031
1032 start = PAGE_ALIGN(start);
1033 if (start >= end)
1034 goto out; /* retval is already zero... */
1035 }
1036
1037 if (offset_in_page(end)) {
1038 /* end address is 4KB aligned but not page aligned. */
1039 retval = mprotect_subpage(PAGE_START(end), prot);
1040 if (retval < 0)
1041 goto out;
1042
1043 end = PAGE_START(end);
1044 }
1045 retval = sys_mprotect(start, end - start, prot);
1046 }
1047 out:
1048 mutex_unlock(&ia32_mmap_mutex);
1049 return retval;
1050#endif
1051}
1052
1053asmlinkage long
1054sys32_mremap (unsigned int addr, unsigned int old_len, unsigned int new_len,
1055 unsigned int flags, unsigned int new_addr)
1056{
1057 long ret;
1058
1059#if PAGE_SHIFT <= IA32_PAGE_SHIFT
1060 ret = sys_mremap(addr, old_len, new_len, flags, new_addr);
1061#else
1062 unsigned int old_end, new_end;
1063
1064 if (OFFSET4K(addr))
1065 return -EINVAL;
1066
1067 old_len = IA32_PAGE_ALIGN(old_len);
1068 new_len = IA32_PAGE_ALIGN(new_len);
1069 old_end = addr + old_len;
1070 new_end = addr + new_len;
1071
1072 if (!new_len)
1073 return -EINVAL;
1074
1075 if ((flags & MREMAP_FIXED) && (OFFSET4K(new_addr)))
1076 return -EINVAL;
1077
1078 if (old_len >= new_len) {
1079 ret = sys32_munmap(addr + new_len, old_len - new_len);
1080 if (ret && old_len != new_len)
1081 return ret;
1082 ret = addr;
1083 if (!(flags & MREMAP_FIXED) || (new_addr == addr))
1084 return ret;
1085 old_len = new_len;
1086 }
1087
1088 addr = PAGE_START(addr);
1089 old_len = PAGE_ALIGN(old_end) - addr;
1090 new_len = PAGE_ALIGN(new_end) - addr;
1091
1092 mutex_lock(&ia32_mmap_mutex);
1093 ret = sys_mremap(addr, old_len, new_len, flags, new_addr);
1094 mutex_unlock(&ia32_mmap_mutex);
1095
1096 if ((ret >= 0) && (old_len < new_len)) {
1097 /* mremap expanded successfully */
1098 ia32_set_pp(old_end, new_end, flags);
1099 }
1100#endif
1101 return ret;
1102}
1103
1104asmlinkage unsigned long
1105sys32_alarm (unsigned int seconds)
1106{
1107 return alarm_setitimer(seconds);
1108}
1109
1110struct sel_arg_struct {
1111 unsigned int n;
1112 unsigned int inp;
1113 unsigned int outp;
1114 unsigned int exp;
1115 unsigned int tvp;
1116};
1117
1118asmlinkage long
1119sys32_old_select (struct sel_arg_struct __user *arg)
1120{
1121 struct sel_arg_struct a;
1122
1123 if (copy_from_user(&a, arg, sizeof(a)))
1124 return -EFAULT;
1125 return compat_sys_select(a.n, compat_ptr(a.inp), compat_ptr(a.outp),
1126 compat_ptr(a.exp), compat_ptr(a.tvp));
1127}
1128
1129#define SEMOP 1
1130#define SEMGET 2
1131#define SEMCTL 3
1132#define SEMTIMEDOP 4
1133#define MSGSND 11
1134#define MSGRCV 12
1135#define MSGGET 13
1136#define MSGCTL 14
1137#define SHMAT 21
1138#define SHMDT 22
1139#define SHMGET 23
1140#define SHMCTL 24
1141
1142asmlinkage long
1143sys32_ipc(u32 call, int first, int second, int third, u32 ptr, u32 fifth)
1144{
1145 int version;
1146
1147 version = call >> 16; /* hack for backward compatibility */
1148 call &= 0xffff;
1149
1150 switch (call) {
1151 case SEMTIMEDOP:
1152 if (fifth)
1153 return compat_sys_semtimedop(first, compat_ptr(ptr),
1154 second, compat_ptr(fifth));
1155 /* else fall through for normal semop() */
1156 case SEMOP:
1157 /* struct sembuf is the same on 32 and 64bit :)) */
1158 return sys_semtimedop(first, compat_ptr(ptr), second,
1159 NULL);
1160 case SEMGET:
1161 return sys_semget(first, second, third);
1162 case SEMCTL:
1163 return compat_sys_semctl(first, second, third, compat_ptr(ptr));
1164
1165 case MSGSND:
1166 return compat_sys_msgsnd(first, second, third, compat_ptr(ptr));
1167 case MSGRCV:
1168 return compat_sys_msgrcv(first, second, fifth, third, version, compat_ptr(ptr));
1169 case MSGGET:
1170 return sys_msgget((key_t) first, second);
1171 case MSGCTL:
1172 return compat_sys_msgctl(first, second, compat_ptr(ptr));
1173
1174 case SHMAT:
1175 return compat_sys_shmat(first, second, third, version, compat_ptr(ptr));
1176 break;
1177 case SHMDT:
1178 return sys_shmdt(compat_ptr(ptr));
1179 case SHMGET:
1180 return sys_shmget(first, (unsigned)second, third);
1181 case SHMCTL:
1182 return compat_sys_shmctl(first, second, compat_ptr(ptr));
1183
1184 default:
1185 return -ENOSYS;
1186 }
1187 return -EINVAL;
1188}
1189
1190asmlinkage long
1191compat_sys_wait4 (compat_pid_t pid, compat_uint_t * stat_addr, int options,
1192 struct compat_rusage *ru);
1193
1194asmlinkage long
1195sys32_waitpid (int pid, unsigned int *stat_addr, int options)
1196{
1197 return compat_sys_wait4(pid, stat_addr, options, NULL);
1198}
1199
1200/*
1201 * The order in which registers are stored in the ptrace regs structure
1202 */
1203#define PT_EBX 0
1204#define PT_ECX 1
1205#define PT_EDX 2
1206#define PT_ESI 3
1207#define PT_EDI 4
1208#define PT_EBP 5
1209#define PT_EAX 6
1210#define PT_DS 7
1211#define PT_ES 8
1212#define PT_FS 9
1213#define PT_GS 10
1214#define PT_ORIG_EAX 11
1215#define PT_EIP 12
1216#define PT_CS 13
1217#define PT_EFL 14
1218#define PT_UESP 15
1219#define PT_SS 16
1220
1221static unsigned int
1222getreg (struct task_struct *child, int regno)
1223{
1224 struct pt_regs *child_regs;
1225
1226 child_regs = task_pt_regs(child);
1227 switch (regno / sizeof(int)) {
1228 case PT_EBX: return child_regs->r11;
1229 case PT_ECX: return child_regs->r9;
1230 case PT_EDX: return child_regs->r10;
1231 case PT_ESI: return child_regs->r14;
1232 case PT_EDI: return child_regs->r15;
1233 case PT_EBP: return child_regs->r13;
1234 case PT_EAX: return child_regs->r8;
1235 case PT_ORIG_EAX: return child_regs->r1; /* see dispatch_to_ia32_handler() */
1236 case PT_EIP: return child_regs->cr_iip;
1237 case PT_UESP: return child_regs->r12;
1238 case PT_EFL: return child->thread.eflag;
1239 case PT_DS: case PT_ES: case PT_FS: case PT_GS: case PT_SS:
1240 return __USER_DS;
1241 case PT_CS: return __USER_CS;
1242 default:
1243 printk(KERN_ERR "ia32.getreg(): unknown register %d\n", regno);
1244 break;
1245 }
1246 return 0;
1247}
1248
1249static void
1250putreg (struct task_struct *child, int regno, unsigned int value)
1251{
1252 struct pt_regs *child_regs;
1253
1254 child_regs = task_pt_regs(child);
1255 switch (regno / sizeof(int)) {
1256 case PT_EBX: child_regs->r11 = value; break;
1257 case PT_ECX: child_regs->r9 = value; break;
1258 case PT_EDX: child_regs->r10 = value; break;
1259 case PT_ESI: child_regs->r14 = value; break;
1260 case PT_EDI: child_regs->r15 = value; break;
1261 case PT_EBP: child_regs->r13 = value; break;
1262 case PT_EAX: child_regs->r8 = value; break;
1263 case PT_ORIG_EAX: child_regs->r1 = value; break;
1264 case PT_EIP: child_regs->cr_iip = value; break;
1265 case PT_UESP: child_regs->r12 = value; break;
1266 case PT_EFL: child->thread.eflag = value; break;
1267 case PT_DS: case PT_ES: case PT_FS: case PT_GS: case PT_SS:
1268 if (value != __USER_DS)
1269 printk(KERN_ERR
1270 "ia32.putreg: attempt to set invalid segment register %d = %x\n",
1271 regno, value);
1272 break;
1273 case PT_CS:
1274 if (value != __USER_CS)
1275 printk(KERN_ERR
1276 "ia32.putreg: attempt to set invalid segment register %d = %x\n",
1277 regno, value);
1278 break;
1279 default:
1280 printk(KERN_ERR "ia32.putreg: unknown register %d\n", regno);
1281 break;
1282 }
1283}
1284
1285static void
1286put_fpreg (int regno, struct _fpreg_ia32 __user *reg, struct pt_regs *ptp,
1287 struct switch_stack *swp, int tos)
1288{
1289 struct _fpreg_ia32 *f;
1290 char buf[32];
1291
1292 f = (struct _fpreg_ia32 *)(((unsigned long)buf + 15) & ~15);
1293 if ((regno += tos) >= 8)
1294 regno -= 8;
1295 switch (regno) {
1296 case 0:
1297 ia64f2ia32f(f, &ptp->f8);
1298 break;
1299 case 1:
1300 ia64f2ia32f(f, &ptp->f9);
1301 break;
1302 case 2:
1303 ia64f2ia32f(f, &ptp->f10);
1304 break;
1305 case 3:
1306 ia64f2ia32f(f, &ptp->f11);
1307 break;
1308 case 4:
1309 case 5:
1310 case 6:
1311 case 7:
1312 ia64f2ia32f(f, &swp->f12 + (regno - 4));
1313 break;
1314 }
1315 copy_to_user(reg, f, sizeof(*reg));
1316}
1317
1318static void
1319get_fpreg (int regno, struct _fpreg_ia32 __user *reg, struct pt_regs *ptp,
1320 struct switch_stack *swp, int tos)
1321{
1322
1323 if ((regno += tos) >= 8)
1324 regno -= 8;
1325 switch (regno) {
1326 case 0:
1327 copy_from_user(&ptp->f8, reg, sizeof(*reg));
1328 break;
1329 case 1:
1330 copy_from_user(&ptp->f9, reg, sizeof(*reg));
1331 break;
1332 case 2:
1333 copy_from_user(&ptp->f10, reg, sizeof(*reg));
1334 break;
1335 case 3:
1336 copy_from_user(&ptp->f11, reg, sizeof(*reg));
1337 break;
1338 case 4:
1339 case 5:
1340 case 6:
1341 case 7:
1342 copy_from_user(&swp->f12 + (regno - 4), reg, sizeof(*reg));
1343 break;
1344 }
1345 return;
1346}
1347
1348int
1349save_ia32_fpstate (struct task_struct *tsk, struct ia32_user_i387_struct __user *save)
1350{
1351 struct switch_stack *swp;
1352 struct pt_regs *ptp;
1353 int i, tos;
1354
1355 if (!access_ok(VERIFY_WRITE, save, sizeof(*save)))
1356 return -EFAULT;
1357
1358 __put_user(tsk->thread.fcr & 0xffff, &save->cwd);
1359 __put_user(tsk->thread.fsr & 0xffff, &save->swd);
1360 __put_user((tsk->thread.fsr>>16) & 0xffff, &save->twd);
1361 __put_user(tsk->thread.fir, &save->fip);
1362 __put_user((tsk->thread.fir>>32) & 0xffff, &save->fcs);
1363 __put_user(tsk->thread.fdr, &save->foo);
1364 __put_user((tsk->thread.fdr>>32) & 0xffff, &save->fos);
1365
1366 /*
1367 * Stack frames start with 16-bytes of temp space
1368 */
1369 swp = (struct switch_stack *)(tsk->thread.ksp + 16);
1370 ptp = task_pt_regs(tsk);
1371 tos = (tsk->thread.fsr >> 11) & 7;
1372 for (i = 0; i < 8; i++)
1373 put_fpreg(i, &save->st_space[i], ptp, swp, tos);
1374 return 0;
1375}
1376
1377static int
1378restore_ia32_fpstate (struct task_struct *tsk, struct ia32_user_i387_struct __user *save)
1379{
1380 struct switch_stack *swp;
1381 struct pt_regs *ptp;
1382 int i, tos;
1383 unsigned int fsrlo, fsrhi, num32;
1384
1385 if (!access_ok(VERIFY_READ, save, sizeof(*save)))
1386 return(-EFAULT);
1387
1388 __get_user(num32, (unsigned int __user *)&save->cwd);
1389 tsk->thread.fcr = (tsk->thread.fcr & (~0x1f3f)) | (num32 & 0x1f3f);
1390 __get_user(fsrlo, (unsigned int __user *)&save->swd);
1391 __get_user(fsrhi, (unsigned int __user *)&save->twd);
1392 num32 = (fsrhi << 16) | fsrlo;
1393 tsk->thread.fsr = (tsk->thread.fsr & (~0xffffffff)) | num32;
1394 __get_user(num32, (unsigned int __user *)&save->fip);
1395 tsk->thread.fir = (tsk->thread.fir & (~0xffffffff)) | num32;
1396 __get_user(num32, (unsigned int __user *)&save->foo);
1397 tsk->thread.fdr = (tsk->thread.fdr & (~0xffffffff)) | num32;
1398
1399 /*
1400 * Stack frames start with 16-bytes of temp space
1401 */
1402 swp = (struct switch_stack *)(tsk->thread.ksp + 16);
1403 ptp = task_pt_regs(tsk);
1404 tos = (tsk->thread.fsr >> 11) & 7;
1405 for (i = 0; i < 8; i++)
1406 get_fpreg(i, &save->st_space[i], ptp, swp, tos);
1407 return 0;
1408}
1409
1410int
1411save_ia32_fpxstate (struct task_struct *tsk, struct ia32_user_fxsr_struct __user *save)
1412{
1413 struct switch_stack *swp;
1414 struct pt_regs *ptp;
1415 int i, tos;
1416 unsigned long mxcsr=0;
1417 unsigned long num128[2];
1418
1419 if (!access_ok(VERIFY_WRITE, save, sizeof(*save)))
1420 return -EFAULT;
1421
1422 __put_user(tsk->thread.fcr & 0xffff, &save->cwd);
1423 __put_user(tsk->thread.fsr & 0xffff, &save->swd);
1424 __put_user((tsk->thread.fsr>>16) & 0xffff, &save->twd);
1425 __put_user(tsk->thread.fir, &save->fip);
1426 __put_user((tsk->thread.fir>>32) & 0xffff, &save->fcs);
1427 __put_user(tsk->thread.fdr, &save->foo);
1428 __put_user((tsk->thread.fdr>>32) & 0xffff, &save->fos);
1429
1430 /*
1431 * Stack frames start with 16-bytes of temp space
1432 */
1433 swp = (struct switch_stack *)(tsk->thread.ksp + 16);
1434 ptp = task_pt_regs(tsk);
1435 tos = (tsk->thread.fsr >> 11) & 7;
1436 for (i = 0; i < 8; i++)
1437 put_fpreg(i, (struct _fpreg_ia32 __user *)&save->st_space[4*i], ptp, swp, tos);
1438
1439 mxcsr = ((tsk->thread.fcr>>32) & 0xff80) | ((tsk->thread.fsr>>32) & 0x3f);
1440 __put_user(mxcsr & 0xffff, &save->mxcsr);
1441 for (i = 0; i < 8; i++) {
1442 memcpy(&(num128[0]), &(swp->f16) + i*2, sizeof(unsigned long));
1443 memcpy(&(num128[1]), &(swp->f17) + i*2, sizeof(unsigned long));
1444 copy_to_user(&save->xmm_space[0] + 4*i, num128, sizeof(struct _xmmreg_ia32));
1445 }
1446 return 0;
1447}
1448
1449static int
1450restore_ia32_fpxstate (struct task_struct *tsk, struct ia32_user_fxsr_struct __user *save)
1451{
1452 struct switch_stack *swp;
1453 struct pt_regs *ptp;
1454 int i, tos;
1455 unsigned int fsrlo, fsrhi, num32;
1456 int mxcsr;
1457 unsigned long num64;
1458 unsigned long num128[2];
1459
1460 if (!access_ok(VERIFY_READ, save, sizeof(*save)))
1461 return(-EFAULT);
1462
1463 __get_user(num32, (unsigned int __user *)&save->cwd);
1464 tsk->thread.fcr = (tsk->thread.fcr & (~0x1f3f)) | (num32 & 0x1f3f);
1465 __get_user(fsrlo, (unsigned int __user *)&save->swd);
1466 __get_user(fsrhi, (unsigned int __user *)&save->twd);
1467 num32 = (fsrhi << 16) | fsrlo;
1468 tsk->thread.fsr = (tsk->thread.fsr & (~0xffffffff)) | num32;
1469 __get_user(num32, (unsigned int __user *)&save->fip);
1470 tsk->thread.fir = (tsk->thread.fir & (~0xffffffff)) | num32;
1471 __get_user(num32, (unsigned int __user *)&save->foo);
1472 tsk->thread.fdr = (tsk->thread.fdr & (~0xffffffff)) | num32;
1473
1474 /*
1475 * Stack frames start with 16-bytes of temp space
1476 */
1477 swp = (struct switch_stack *)(tsk->thread.ksp + 16);
1478 ptp = task_pt_regs(tsk);
1479 tos = (tsk->thread.fsr >> 11) & 7;
1480 for (i = 0; i < 8; i++)
1481 get_fpreg(i, (struct _fpreg_ia32 __user *)&save->st_space[4*i], ptp, swp, tos);
1482
1483 __get_user(mxcsr, (unsigned int __user *)&save->mxcsr);
1484 num64 = mxcsr & 0xff10;
1485 tsk->thread.fcr = (tsk->thread.fcr & (~0xff1000000000UL)) | (num64<<32);
1486 num64 = mxcsr & 0x3f;
1487 tsk->thread.fsr = (tsk->thread.fsr & (~0x3f00000000UL)) | (num64<<32);
1488
1489 for (i = 0; i < 8; i++) {
1490 copy_from_user(num128, &save->xmm_space[0] + 4*i, sizeof(struct _xmmreg_ia32));
1491 memcpy(&(swp->f16) + i*2, &(num128[0]), sizeof(unsigned long));
1492 memcpy(&(swp->f17) + i*2, &(num128[1]), sizeof(unsigned long));
1493 }
1494 return 0;
1495}
1496
1497long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
1498 compat_ulong_t caddr, compat_ulong_t cdata)
1499{
1500 unsigned long addr = caddr;
1501 unsigned long data = cdata;
1502 unsigned int tmp;
1503 long i, ret;
1504
1505 switch (request) {
1506 case PTRACE_PEEKUSR: /* read word at addr in USER area */
1507 ret = -EIO;
1508 if ((addr & 3) || addr > 17*sizeof(int))
1509 break;
1510
1511 tmp = getreg(child, addr);
1512 if (!put_user(tmp, (unsigned int __user *) compat_ptr(data)))
1513 ret = 0;
1514 break;
1515
1516 case PTRACE_POKEUSR: /* write word at addr in USER area */
1517 ret = -EIO;
1518 if ((addr & 3) || addr > 17*sizeof(int))
1519 break;
1520
1521 putreg(child, addr, data);
1522 ret = 0;
1523 break;
1524
1525 case IA32_PTRACE_GETREGS:
1526 if (!access_ok(VERIFY_WRITE, compat_ptr(data), 17*sizeof(int))) {
1527 ret = -EIO;
1528 break;
1529 }
1530 for (i = 0; i < (int) (17*sizeof(int)); i += sizeof(int) ) {
1531 put_user(getreg(child, i), (unsigned int __user *) compat_ptr(data));
1532 data += sizeof(int);
1533 }
1534 ret = 0;
1535 break;
1536
1537 case IA32_PTRACE_SETREGS:
1538 if (!access_ok(VERIFY_READ, compat_ptr(data), 17*sizeof(int))) {
1539 ret = -EIO;
1540 break;
1541 }
1542 for (i = 0; i < (int) (17*sizeof(int)); i += sizeof(int) ) {
1543 get_user(tmp, (unsigned int __user *) compat_ptr(data));
1544 putreg(child, i, tmp);
1545 data += sizeof(int);
1546 }
1547 ret = 0;
1548 break;
1549
1550 case IA32_PTRACE_GETFPREGS:
1551 ret = save_ia32_fpstate(child, (struct ia32_user_i387_struct __user *)
1552 compat_ptr(data));
1553 break;
1554
1555 case IA32_PTRACE_GETFPXREGS:
1556 ret = save_ia32_fpxstate(child, (struct ia32_user_fxsr_struct __user *)
1557 compat_ptr(data));
1558 break;
1559
1560 case IA32_PTRACE_SETFPREGS:
1561 ret = restore_ia32_fpstate(child, (struct ia32_user_i387_struct __user *)
1562 compat_ptr(data));
1563 break;
1564
1565 case IA32_PTRACE_SETFPXREGS:
1566 ret = restore_ia32_fpxstate(child, (struct ia32_user_fxsr_struct __user *)
1567 compat_ptr(data));
1568 break;
1569
1570 default:
1571 return compat_ptrace_request(child, request, caddr, cdata);
1572 }
1573 return ret;
1574}
1575
1576typedef struct {
1577 unsigned int ss_sp;
1578 unsigned int ss_flags;
1579 unsigned int ss_size;
1580} ia32_stack_t;
1581
1582asmlinkage long
1583sys32_sigaltstack (ia32_stack_t __user *uss32, ia32_stack_t __user *uoss32,
1584 long arg2, long arg3, long arg4, long arg5, long arg6,
1585 long arg7, struct pt_regs pt)
1586{
1587 stack_t uss, uoss;
1588 ia32_stack_t buf32;
1589 int ret;
1590 mm_segment_t old_fs = get_fs();
1591
1592 if (uss32) {
1593 if (copy_from_user(&buf32, uss32, sizeof(ia32_stack_t)))
1594 return -EFAULT;
1595 uss.ss_sp = (void __user *) (long) buf32.ss_sp;
1596 uss.ss_flags = buf32.ss_flags;
1597 /* MINSIGSTKSZ is different for ia32 vs ia64. We lie here to pass the
1598 check and set it to the user requested value later */
1599 if ((buf32.ss_flags != SS_DISABLE) && (buf32.ss_size < MINSIGSTKSZ_IA32)) {
1600 ret = -ENOMEM;
1601 goto out;
1602 }
1603 uss.ss_size = MINSIGSTKSZ;
1604 }
1605 set_fs(KERNEL_DS);
1606 ret = do_sigaltstack(uss32 ? (stack_t __user *) &uss : NULL,
1607 (stack_t __user *) &uoss, pt.r12);
1608 current->sas_ss_size = buf32.ss_size;
1609 set_fs(old_fs);
1610out:
1611 if (ret < 0)
1612 return(ret);
1613 if (uoss32) {
1614 buf32.ss_sp = (long __user) uoss.ss_sp;
1615 buf32.ss_flags = uoss.ss_flags;
1616 buf32.ss_size = uoss.ss_size;
1617 if (copy_to_user(uoss32, &buf32, sizeof(ia32_stack_t)))
1618 return -EFAULT;
1619 }
1620 return ret;
1621}
1622
1623asmlinkage int
1624sys32_msync (unsigned int start, unsigned int len, int flags)
1625{
1626 unsigned int addr;
1627
1628 if (OFFSET4K(start))
1629 return -EINVAL;
1630 addr = PAGE_START(start);
1631 return sys_msync(addr, len + (start - addr), flags);
1632}
1633
1634asmlinkage long
1635sys32_newuname (struct new_utsname __user *name)
1636{
1637 int ret = sys_newuname(name);
1638
1639 if (!ret)
1640 if (copy_to_user(name->machine, "i686\0\0\0", 8))
1641 ret = -EFAULT;
1642 return ret;
1643}
1644
1645asmlinkage long
1646sys32_getresuid16 (u16 __user *ruid, u16 __user *euid, u16 __user *suid)
1647{
1648 uid_t a, b, c;
1649 int ret;
1650 mm_segment_t old_fs = get_fs();
1651
1652 set_fs(KERNEL_DS);
1653 ret = sys_getresuid((uid_t __user *) &a, (uid_t __user *) &b, (uid_t __user *) &c);
1654 set_fs(old_fs);
1655
1656 if (put_user(a, ruid) || put_user(b, euid) || put_user(c, suid))
1657 return -EFAULT;
1658 return ret;
1659}
1660
1661asmlinkage long
1662sys32_getresgid16 (u16 __user *rgid, u16 __user *egid, u16 __user *sgid)
1663{
1664 gid_t a, b, c;
1665 int ret;
1666 mm_segment_t old_fs = get_fs();
1667
1668 set_fs(KERNEL_DS);
1669 ret = sys_getresgid((gid_t __user *) &a, (gid_t __user *) &b, (gid_t __user *) &c);
1670 set_fs(old_fs);
1671
1672 if (ret)
1673 return ret;
1674
1675 return put_user(a, rgid) | put_user(b, egid) | put_user(c, sgid);
1676}
1677
1678asmlinkage long
1679sys32_lseek (unsigned int fd, int offset, unsigned int whence)
1680{
1681 /* Sign-extension of "offset" is important here... */
1682 return sys_lseek(fd, offset, whence);
1683}
1684
1685static int
1686groups16_to_user(short __user *grouplist, struct group_info *group_info)
1687{
1688 int i;
1689 short group;
1690
1691 for (i = 0; i < group_info->ngroups; i++) {
1692 group = (short)GROUP_AT(group_info, i);
1693 if (put_user(group, grouplist+i))
1694 return -EFAULT;
1695 }
1696
1697 return 0;
1698}
1699
1700static int
1701groups16_from_user(struct group_info *group_info, short __user *grouplist)
1702{
1703 int i;
1704 short group;
1705
1706 for (i = 0; i < group_info->ngroups; i++) {
1707 if (get_user(group, grouplist+i))
1708 return -EFAULT;
1709 GROUP_AT(group_info, i) = (gid_t)group;
1710 }
1711
1712 return 0;
1713}
1714
1715asmlinkage long
1716sys32_getgroups16 (int gidsetsize, short __user *grouplist)
1717{
1718 const struct cred *cred = current_cred();
1719 int i;
1720
1721 if (gidsetsize < 0)
1722 return -EINVAL;
1723
1724 i = cred->group_info->ngroups;
1725 if (gidsetsize) {
1726 if (i > gidsetsize) {
1727 i = -EINVAL;
1728 goto out;
1729 }
1730 if (groups16_to_user(grouplist, cred->group_info)) {
1731 i = -EFAULT;
1732 goto out;
1733 }
1734 }
1735out:
1736 return i;
1737}
1738
1739asmlinkage long
1740sys32_setgroups16 (int gidsetsize, short __user *grouplist)
1741{
1742 struct group_info *group_info;
1743 int retval;
1744
1745 if (!capable(CAP_SETGID))
1746 return -EPERM;
1747 if ((unsigned)gidsetsize > NGROUPS_MAX)
1748 return -EINVAL;
1749
1750 group_info = groups_alloc(gidsetsize);
1751 if (!group_info)
1752 return -ENOMEM;
1753 retval = groups16_from_user(group_info, grouplist);
1754 if (retval) {
1755 put_group_info(group_info);
1756 return retval;
1757 }
1758
1759 retval = set_current_groups(group_info);
1760 put_group_info(group_info);
1761
1762 return retval;
1763}
1764
1765asmlinkage long
1766sys32_truncate64 (unsigned int path, unsigned int len_lo, unsigned int len_hi)
1767{
1768 return sys_truncate(compat_ptr(path), ((unsigned long) len_hi << 32) | len_lo);
1769}
1770
1771asmlinkage long
1772sys32_ftruncate64 (int fd, unsigned int len_lo, unsigned int len_hi)
1773{
1774 return sys_ftruncate(fd, ((unsigned long) len_hi << 32) | len_lo);
1775}
1776
1777static int
1778putstat64 (struct stat64 __user *ubuf, struct kstat *kbuf)
1779{
1780 int err;
1781 u64 hdev;
1782
1783 if (clear_user(ubuf, sizeof(*ubuf)))
1784 return -EFAULT;
1785
1786 hdev = huge_encode_dev(kbuf->dev);
1787 err = __put_user(hdev, (u32 __user*)&ubuf->st_dev);
1788 err |= __put_user(hdev >> 32, ((u32 __user*)&ubuf->st_dev) + 1);
1789 err |= __put_user(kbuf->ino, &ubuf->__st_ino);
1790 err |= __put_user(kbuf->ino, &ubuf->st_ino_lo);
1791 err |= __put_user(kbuf->ino >> 32, &ubuf->st_ino_hi);
1792 err |= __put_user(kbuf->mode, &ubuf->st_mode);
1793 err |= __put_user(kbuf->nlink, &ubuf->st_nlink);
1794 err |= __put_user(kbuf->uid, &ubuf->st_uid);
1795 err |= __put_user(kbuf->gid, &ubuf->st_gid);
1796 hdev = huge_encode_dev(kbuf->rdev);
1797 err = __put_user(hdev, (u32 __user*)&ubuf->st_rdev);
1798 err |= __put_user(hdev >> 32, ((u32 __user*)&ubuf->st_rdev) + 1);
1799 err |= __put_user(kbuf->size, &ubuf->st_size_lo);
1800 err |= __put_user((kbuf->size >> 32), &ubuf->st_size_hi);
1801 err |= __put_user(kbuf->atime.tv_sec, &ubuf->st_atime);
1802 err |= __put_user(kbuf->atime.tv_nsec, &ubuf->st_atime_nsec);
1803 err |= __put_user(kbuf->mtime.tv_sec, &ubuf->st_mtime);
1804 err |= __put_user(kbuf->mtime.tv_nsec, &ubuf->st_mtime_nsec);
1805 err |= __put_user(kbuf->ctime.tv_sec, &ubuf->st_ctime);
1806 err |= __put_user(kbuf->ctime.tv_nsec, &ubuf->st_ctime_nsec);
1807 err |= __put_user(kbuf->blksize, &ubuf->st_blksize);
1808 err |= __put_user(kbuf->blocks, &ubuf->st_blocks);
1809 return err;
1810}
1811
1812asmlinkage long
1813sys32_stat64 (char __user *filename, struct stat64 __user *statbuf)
1814{
1815 struct kstat s;
1816 long ret = vfs_stat(filename, &s);
1817 if (!ret)
1818 ret = putstat64(statbuf, &s);
1819 return ret;
1820}
1821
1822asmlinkage long
1823sys32_lstat64 (char __user *filename, struct stat64 __user *statbuf)
1824{
1825 struct kstat s;
1826 long ret = vfs_lstat(filename, &s);
1827 if (!ret)
1828 ret = putstat64(statbuf, &s);
1829 return ret;
1830}
1831
1832asmlinkage long
1833sys32_fstat64 (unsigned int fd, struct stat64 __user *statbuf)
1834{
1835 struct kstat s;
1836 long ret = vfs_fstat(fd, &s);
1837 if (!ret)
1838 ret = putstat64(statbuf, &s);
1839 return ret;
1840}
1841
1842asmlinkage long
1843sys32_sched_rr_get_interval (pid_t pid, struct compat_timespec __user *interval)
1844{
1845 mm_segment_t old_fs = get_fs();
1846 struct timespec t;
1847 long ret;
1848
1849 set_fs(KERNEL_DS);
1850 ret = sys_sched_rr_get_interval(pid, (struct timespec __user *) &t);
1851 set_fs(old_fs);
1852 if (put_compat_timespec(&t, interval))
1853 return -EFAULT;
1854 return ret;
1855}
1856
1857asmlinkage long
1858sys32_pread (unsigned int fd, void __user *buf, unsigned int count, u32 pos_lo, u32 pos_hi)
1859{
1860 return sys_pread64(fd, buf, count, ((unsigned long) pos_hi << 32) | pos_lo);
1861}
1862
1863asmlinkage long
1864sys32_pwrite (unsigned int fd, void __user *buf, unsigned int count, u32 pos_lo, u32 pos_hi)
1865{
1866 return sys_pwrite64(fd, buf, count, ((unsigned long) pos_hi << 32) | pos_lo);
1867}
1868
1869asmlinkage long
1870sys32_sendfile (int out_fd, int in_fd, int __user *offset, unsigned int count)
1871{
1872 mm_segment_t old_fs = get_fs();
1873 long ret;
1874 off_t of;
1875
1876 if (offset && get_user(of, offset))
1877 return -EFAULT;
1878
1879 set_fs(KERNEL_DS);
1880 ret = sys_sendfile(out_fd, in_fd, offset ? (off_t __user *) &of : NULL, count);
1881 set_fs(old_fs);
1882
1883 if (offset && put_user(of, offset))
1884 return -EFAULT;
1885
1886 return ret;
1887}
1888
1889asmlinkage long
1890sys32_personality (unsigned int personality)
1891{
1892 long ret;
1893
1894 if (current->personality == PER_LINUX32 && personality == PER_LINUX)
1895 personality = PER_LINUX32;
1896 ret = sys_personality(personality);
1897 if (ret == PER_LINUX32)
1898 ret = PER_LINUX;
1899 return ret;
1900}
1901
1902asmlinkage unsigned long
1903sys32_brk (unsigned int brk)
1904{
1905 unsigned long ret, obrk;
1906 struct mm_struct *mm = current->mm;
1907
1908 obrk = mm->brk;
1909 ret = sys_brk(brk);
1910 if (ret < obrk)
1911 clear_user(compat_ptr(ret), PAGE_ALIGN(ret) - ret);
1912 return ret;
1913}
1914
1915/* Structure for ia32 emulation on ia64 */
1916struct epoll_event32
1917{
1918 u32 events;
1919 u32 data[2];
1920};
1921
1922asmlinkage long
1923sys32_epoll_ctl(int epfd, int op, int fd, struct epoll_event32 __user *event)
1924{
1925 mm_segment_t old_fs = get_fs();
1926 struct epoll_event event64;
1927 int error;
1928 u32 data_halfword;
1929
1930 if (!access_ok(VERIFY_READ, event, sizeof(struct epoll_event32)))
1931 return -EFAULT;
1932
1933 __get_user(event64.events, &event->events);
1934 __get_user(data_halfword, &event->data[0]);
1935 event64.data = data_halfword;
1936 __get_user(data_halfword, &event->data[1]);
1937 event64.data |= (u64)data_halfword << 32;
1938
1939 set_fs(KERNEL_DS);
1940 error = sys_epoll_ctl(epfd, op, fd, (struct epoll_event __user *) &event64);
1941 set_fs(old_fs);
1942
1943 return error;
1944}
1945
1946asmlinkage long
1947sys32_epoll_wait(int epfd, struct epoll_event32 __user * events, int maxevents,
1948 int timeout)
1949{
1950 struct epoll_event *events64 = NULL;
1951 mm_segment_t old_fs = get_fs();
1952 int numevents, size;
1953 int evt_idx;
1954 int do_free_pages = 0;
1955
1956 if (maxevents <= 0) {
1957 return -EINVAL;
1958 }
1959
1960 /* Verify that the area passed by the user is writeable */
1961 if (!access_ok(VERIFY_WRITE, events, maxevents * sizeof(struct epoll_event32)))
1962 return -EFAULT;
1963
1964 /*
1965 * Allocate space for the intermediate copy. If the space needed
1966 * is large enough to cause kmalloc to fail, then try again with
1967 * __get_free_pages.
1968 */
1969 size = maxevents * sizeof(struct epoll_event);
1970 events64 = kmalloc(size, GFP_KERNEL);
1971 if (events64 == NULL) {
1972 events64 = (struct epoll_event *)
1973 __get_free_pages(GFP_KERNEL, get_order(size));
1974 if (events64 == NULL)
1975 return -ENOMEM;
1976 do_free_pages = 1;
1977 }
1978
1979 /* Do the system call */
1980 set_fs(KERNEL_DS); /* copy_to/from_user should work on kernel mem*/
1981 numevents = sys_epoll_wait(epfd, (struct epoll_event __user *) events64,
1982 maxevents, timeout);
1983 set_fs(old_fs);
1984
1985 /* Don't modify userspace memory if we're returning an error */
1986 if (numevents > 0) {
1987 /* Translate the 64-bit structures back into the 32-bit
1988 structures */
1989 for (evt_idx = 0; evt_idx < numevents; evt_idx++) {
1990 __put_user(events64[evt_idx].events,
1991 &events[evt_idx].events);
1992 __put_user((u32)events64[evt_idx].data,
1993 &events[evt_idx].data[0]);
1994 __put_user((u32)(events64[evt_idx].data >> 32),
1995 &events[evt_idx].data[1]);
1996 }
1997 }
1998
1999 if (do_free_pages)
2000 free_pages((unsigned long) events64, get_order(size));
2001 else
2002 kfree(events64);
2003 return numevents;
2004}
2005
2006/*
2007 * Get a yet unused TLS descriptor index.
2008 */
2009static int
2010get_free_idx (void)
2011{
2012 struct thread_struct *t = &current->thread;
2013 int idx;
2014
2015 for (idx = 0; idx < GDT_ENTRY_TLS_ENTRIES; idx++)
2016 if (desc_empty(t->tls_array + idx))
2017 return idx + GDT_ENTRY_TLS_MIN;
2018 return -ESRCH;
2019}
2020
2021static void set_tls_desc(struct task_struct *p, int idx,
2022 const struct ia32_user_desc *info, int n)
2023{
2024 struct thread_struct *t = &p->thread;
2025 struct desc_struct *desc = &t->tls_array[idx - GDT_ENTRY_TLS_MIN];
2026 int cpu;
2027
2028 /*
2029 * We must not get preempted while modifying the TLS.
2030 */
2031 cpu = get_cpu();
2032
2033 while (n-- > 0) {
2034 if (LDT_empty(info)) {
2035 desc->a = 0;
2036 desc->b = 0;
2037 } else {
2038 desc->a = LDT_entry_a(info);
2039 desc->b = LDT_entry_b(info);
2040 }
2041
2042 ++info;
2043 ++desc;
2044 }
2045
2046 if (t == &current->thread)
2047 load_TLS(t, cpu);
2048
2049 put_cpu();
2050}
2051
2052/*
2053 * Set a given TLS descriptor:
2054 */
2055asmlinkage int
2056sys32_set_thread_area (struct ia32_user_desc __user *u_info)
2057{
2058 struct ia32_user_desc info;
2059 int idx;
2060
2061 if (copy_from_user(&info, u_info, sizeof(info)))
2062 return -EFAULT;
2063 idx = info.entry_number;
2064
2065 /*
2066 * index -1 means the kernel should try to find and allocate an empty descriptor:
2067 */
2068 if (idx == -1) {
2069 idx = get_free_idx();
2070 if (idx < 0)
2071 return idx;
2072 if (put_user(idx, &u_info->entry_number))
2073 return -EFAULT;
2074 }
2075
2076 if (idx < GDT_ENTRY_TLS_MIN || idx > GDT_ENTRY_TLS_MAX)
2077 return -EINVAL;
2078
2079 set_tls_desc(current, idx, &info, 1);
2080 return 0;
2081}
2082
2083/*
2084 * Get the current Thread-Local Storage area:
2085 */
2086
2087#define GET_BASE(desc) ( \
2088 (((desc)->a >> 16) & 0x0000ffff) | \
2089 (((desc)->b << 16) & 0x00ff0000) | \
2090 ( (desc)->b & 0xff000000) )
2091
2092#define GET_LIMIT(desc) ( \
2093 ((desc)->a & 0x0ffff) | \
2094 ((desc)->b & 0xf0000) )
2095
2096#define GET_32BIT(desc) (((desc)->b >> 22) & 1)
2097#define GET_CONTENTS(desc) (((desc)->b >> 10) & 3)
2098#define GET_WRITABLE(desc) (((desc)->b >> 9) & 1)
2099#define GET_LIMIT_PAGES(desc) (((desc)->b >> 23) & 1)
2100#define GET_PRESENT(desc) (((desc)->b >> 15) & 1)
2101#define GET_USEABLE(desc) (((desc)->b >> 20) & 1)
2102
2103static void fill_user_desc(struct ia32_user_desc *info, int idx,
2104 const struct desc_struct *desc)
2105{
2106 info->entry_number = idx;
2107 info->base_addr = GET_BASE(desc);
2108 info->limit = GET_LIMIT(desc);
2109 info->seg_32bit = GET_32BIT(desc);
2110 info->contents = GET_CONTENTS(desc);
2111 info->read_exec_only = !GET_WRITABLE(desc);
2112 info->limit_in_pages = GET_LIMIT_PAGES(desc);
2113 info->seg_not_present = !GET_PRESENT(desc);
2114 info->useable = GET_USEABLE(desc);
2115}
2116
2117asmlinkage int
2118sys32_get_thread_area (struct ia32_user_desc __user *u_info)
2119{
2120 struct ia32_user_desc info;
2121 struct desc_struct *desc;
2122 int idx;
2123
2124 if (get_user(idx, &u_info->entry_number))
2125 return -EFAULT;
2126 if (idx < GDT_ENTRY_TLS_MIN || idx > GDT_ENTRY_TLS_MAX)
2127 return -EINVAL;
2128
2129 desc = current->thread.tls_array + idx - GDT_ENTRY_TLS_MIN;
2130 fill_user_desc(&info, idx, desc);
2131
2132 if (copy_to_user(u_info, &info, sizeof(info)))
2133 return -EFAULT;
2134 return 0;
2135}
2136
2137struct regset_get {
2138 void *kbuf;
2139 void __user *ubuf;
2140};
2141
2142struct regset_set {
2143 const void *kbuf;
2144 const void __user *ubuf;
2145};
2146
2147struct regset_getset {
2148 struct task_struct *target;
2149 const struct user_regset *regset;
2150 union {
2151 struct regset_get get;
2152 struct regset_set set;
2153 } u;
2154 unsigned int pos;
2155 unsigned int count;
2156 int ret;
2157};
2158
2159static void getfpreg(struct task_struct *task, int regno, int *val)
2160{
2161 switch (regno / sizeof(int)) {
2162 case 0:
2163 *val = task->thread.fcr & 0xffff;
2164 break;
2165 case 1:
2166 *val = task->thread.fsr & 0xffff;
2167 break;
2168 case 2:
2169 *val = (task->thread.fsr>>16) & 0xffff;
2170 break;
2171 case 3:
2172 *val = task->thread.fir;
2173 break;
2174 case 4:
2175 *val = (task->thread.fir>>32) & 0xffff;
2176 break;
2177 case 5:
2178 *val = task->thread.fdr;
2179 break;
2180 case 6:
2181 *val = (task->thread.fdr >> 32) & 0xffff;
2182 break;
2183 }
2184}
2185
2186static void setfpreg(struct task_struct *task, int regno, int val)
2187{
2188 switch (regno / sizeof(int)) {
2189 case 0:
2190 task->thread.fcr = (task->thread.fcr & (~0x1f3f))
2191 | (val & 0x1f3f);
2192 break;
2193 case 1:
2194 task->thread.fsr = (task->thread.fsr & (~0xffff)) | val;
2195 break;
2196 case 2:
2197 task->thread.fsr = (task->thread.fsr & (~0xffff0000))
2198 | (val << 16);
2199 break;
2200 case 3:
2201 task->thread.fir = (task->thread.fir & (~0xffffffff)) | val;
2202 break;
2203 case 5:
2204 task->thread.fdr = (task->thread.fdr & (~0xffffffff)) | val;
2205 break;
2206 }
2207}
2208
2209static void access_fpreg_ia32(int regno, void *reg,
2210 struct pt_regs *pt, struct switch_stack *sw,
2211 int tos, int write)
2212{
2213 void *f;
2214
2215 if ((regno += tos) >= 8)
2216 regno -= 8;
2217 if (regno < 4)
2218 f = &pt->f8 + regno;
2219 else if (regno <= 7)
2220 f = &sw->f12 + (regno - 4);
2221 else {
2222 printk(KERN_ERR "regno must be less than 7 \n");
2223 return;
2224 }
2225
2226 if (write)
2227 memcpy(f, reg, sizeof(struct _fpreg_ia32));
2228 else
2229 memcpy(reg, f, sizeof(struct _fpreg_ia32));
2230}
2231
2232static void do_fpregs_get(struct unw_frame_info *info, void *arg)
2233{
2234 struct regset_getset *dst = arg;
2235 struct task_struct *task = dst->target;
2236 struct pt_regs *pt;
2237 int start, end, tos;
2238 char buf[80];
2239
2240 if (dst->count == 0 || unw_unwind_to_user(info) < 0)
2241 return;
2242 if (dst->pos < 7 * sizeof(int)) {
2243 end = min((dst->pos + dst->count),
2244 (unsigned int)(7 * sizeof(int)));
2245 for (start = dst->pos; start < end; start += sizeof(int))
2246 getfpreg(task, start, (int *)(buf + start));
2247 dst->ret = user_regset_copyout(&dst->pos, &dst->count,
2248 &dst->u.get.kbuf, &dst->u.get.ubuf, buf,
2249 0, 7 * sizeof(int));
2250 if (dst->ret || dst->count == 0)
2251 return;
2252 }
2253 if (dst->pos < sizeof(struct ia32_user_i387_struct)) {
2254 pt = task_pt_regs(task);
2255 tos = (task->thread.fsr >> 11) & 7;
2256 end = min(dst->pos + dst->count,
2257 (unsigned int)(sizeof(struct ia32_user_i387_struct)));
2258 start = (dst->pos - 7 * sizeof(int)) /
2259 sizeof(struct _fpreg_ia32);
2260 end = (end - 7 * sizeof(int)) / sizeof(struct _fpreg_ia32);
2261 for (; start < end; start++)
2262 access_fpreg_ia32(start,
2263 (struct _fpreg_ia32 *)buf + start,
2264 pt, info->sw, tos, 0);
2265 dst->ret = user_regset_copyout(&dst->pos, &dst->count,
2266 &dst->u.get.kbuf, &dst->u.get.ubuf,
2267 buf, 7 * sizeof(int),
2268 sizeof(struct ia32_user_i387_struct));
2269 if (dst->ret || dst->count == 0)
2270 return;
2271 }
2272}
2273
2274static void do_fpregs_set(struct unw_frame_info *info, void *arg)
2275{
2276 struct regset_getset *dst = arg;
2277 struct task_struct *task = dst->target;
2278 struct pt_regs *pt;
2279 char buf[80];
2280 int end, start, tos;
2281
2282 if (dst->count == 0 || unw_unwind_to_user(info) < 0)
2283 return;
2284
2285 if (dst->pos < 7 * sizeof(int)) {
2286 start = dst->pos;
2287 dst->ret = user_regset_copyin(&dst->pos, &dst->count,
2288 &dst->u.set.kbuf, &dst->u.set.ubuf, buf,
2289 0, 7 * sizeof(int));
2290 if (dst->ret)
2291 return;
2292 for (; start < dst->pos; start += sizeof(int))
2293 setfpreg(task, start, *((int *)(buf + start)));
2294 if (dst->count == 0)
2295 return;
2296 }
2297 if (dst->pos < sizeof(struct ia32_user_i387_struct)) {
2298 start = (dst->pos - 7 * sizeof(int)) /
2299 sizeof(struct _fpreg_ia32);
2300 dst->ret = user_regset_copyin(&dst->pos, &dst->count,
2301 &dst->u.set.kbuf, &dst->u.set.ubuf,
2302 buf, 7 * sizeof(int),
2303 sizeof(struct ia32_user_i387_struct));
2304 if (dst->ret)
2305 return;
2306 pt = task_pt_regs(task);
2307 tos = (task->thread.fsr >> 11) & 7;
2308 end = (dst->pos - 7 * sizeof(int)) / sizeof(struct _fpreg_ia32);
2309 for (; start < end; start++)
2310 access_fpreg_ia32(start,
2311 (struct _fpreg_ia32 *)buf + start,
2312 pt, info->sw, tos, 1);
2313 if (dst->count == 0)
2314 return;
2315 }
2316}
2317
2318#define OFFSET(member) ((int)(offsetof(struct ia32_user_fxsr_struct, member)))
2319static void getfpxreg(struct task_struct *task, int start, int end, char *buf)
2320{
2321 int min_val;
2322
2323 min_val = min(end, OFFSET(fop));
2324 while (start < min_val) {
2325 if (start == OFFSET(cwd))
2326 *((short *)buf) = task->thread.fcr & 0xffff;
2327 else if (start == OFFSET(swd))
2328 *((short *)buf) = task->thread.fsr & 0xffff;
2329 else if (start == OFFSET(twd))
2330 *((short *)buf) = (task->thread.fsr>>16) & 0xffff;
2331 buf += 2;
2332 start += 2;
2333 }
2334 /* skip fop element */
2335 if (start == OFFSET(fop)) {
2336 start += 2;
2337 buf += 2;
2338 }
2339 while (start < end) {
2340 if (start == OFFSET(fip))
2341 *((int *)buf) = task->thread.fir;
2342 else if (start == OFFSET(fcs))
2343 *((int *)buf) = (task->thread.fir>>32) & 0xffff;
2344 else if (start == OFFSET(foo))
2345 *((int *)buf) = task->thread.fdr;
2346 else if (start == OFFSET(fos))
2347 *((int *)buf) = (task->thread.fdr>>32) & 0xffff;
2348 else if (start == OFFSET(mxcsr))
2349 *((int *)buf) = ((task->thread.fcr>>32) & 0xff80)
2350 | ((task->thread.fsr>>32) & 0x3f);
2351 buf += 4;
2352 start += 4;
2353 }
2354}
2355
2356static void setfpxreg(struct task_struct *task, int start, int end, char *buf)
2357{
2358 int min_val, num32;
2359 short num;
2360 unsigned long num64;
2361
2362 min_val = min(end, OFFSET(fop));
2363 while (start < min_val) {
2364 num = *((short *)buf);
2365 if (start == OFFSET(cwd)) {
2366 task->thread.fcr = (task->thread.fcr & (~0x1f3f))
2367 | (num & 0x1f3f);
2368 } else if (start == OFFSET(swd)) {
2369 task->thread.fsr = (task->thread.fsr & (~0xffff)) | num;
2370 } else if (start == OFFSET(twd)) {
2371 task->thread.fsr = (task->thread.fsr & (~0xffff0000))
2372 | (((int)num) << 16);
2373 }
2374 buf += 2;
2375 start += 2;
2376 }
2377 /* skip fop element */
2378 if (start == OFFSET(fop)) {
2379 start += 2;
2380 buf += 2;
2381 }
2382 while (start < end) {
2383 num32 = *((int *)buf);
2384 if (start == OFFSET(fip))
2385 task->thread.fir = (task->thread.fir & (~0xffffffff))
2386 | num32;
2387 else if (start == OFFSET(foo))
2388 task->thread.fdr = (task->thread.fdr & (~0xffffffff))
2389 | num32;
2390 else if (start == OFFSET(mxcsr)) {
2391 num64 = num32 & 0xff10;
2392 task->thread.fcr = (task->thread.fcr &
2393 (~0xff1000000000UL)) | (num64<<32);
2394 num64 = num32 & 0x3f;
2395 task->thread.fsr = (task->thread.fsr &
2396 (~0x3f00000000UL)) | (num64<<32);
2397 }
2398 buf += 4;
2399 start += 4;
2400 }
2401}
2402
2403static void do_fpxregs_get(struct unw_frame_info *info, void *arg)
2404{
2405 struct regset_getset *dst = arg;
2406 struct task_struct *task = dst->target;
2407 struct pt_regs *pt;
2408 char buf[128];
2409 int start, end, tos;
2410
2411 if (dst->count == 0 || unw_unwind_to_user(info) < 0)
2412 return;
2413 if (dst->pos < OFFSET(st_space[0])) {
2414 end = min(dst->pos + dst->count, (unsigned int)32);
2415 getfpxreg(task, dst->pos, end, buf);
2416 dst->ret = user_regset_copyout(&dst->pos, &dst->count,
2417 &dst->u.get.kbuf, &dst->u.get.ubuf, buf,
2418 0, OFFSET(st_space[0]));
2419 if (dst->ret || dst->count == 0)
2420 return;
2421 }
2422 if (dst->pos < OFFSET(xmm_space[0])) {
2423 pt = task_pt_regs(task);
2424 tos = (task->thread.fsr >> 11) & 7;
2425 end = min(dst->pos + dst->count,
2426 (unsigned int)OFFSET(xmm_space[0]));
2427 start = (dst->pos - OFFSET(st_space[0])) / 16;
2428 end = (end - OFFSET(st_space[0])) / 16;
2429 for (; start < end; start++)
2430 access_fpreg_ia32(start, buf + 16 * start, pt,
2431 info->sw, tos, 0);
2432 dst->ret = user_regset_copyout(&dst->pos, &dst->count,
2433 &dst->u.get.kbuf, &dst->u.get.ubuf,
2434 buf, OFFSET(st_space[0]), OFFSET(xmm_space[0]));
2435 if (dst->ret || dst->count == 0)
2436 return;
2437 }
2438 if (dst->pos < OFFSET(padding[0]))
2439 dst->ret = user_regset_copyout(&dst->pos, &dst->count,
2440 &dst->u.get.kbuf, &dst->u.get.ubuf,
2441 &info->sw->f16, OFFSET(xmm_space[0]),
2442 OFFSET(padding[0]));
2443}
2444
2445static void do_fpxregs_set(struct unw_frame_info *info, void *arg)
2446{
2447 struct regset_getset *dst = arg;
2448 struct task_struct *task = dst->target;
2449 char buf[128];
2450 int start, end;
2451
2452 if (dst->count == 0 || unw_unwind_to_user(info) < 0)
2453 return;
2454
2455 if (dst->pos < OFFSET(st_space[0])) {
2456 start = dst->pos;
2457 dst->ret = user_regset_copyin(&dst->pos, &dst->count,
2458 &dst->u.set.kbuf, &dst->u.set.ubuf,
2459 buf, 0, OFFSET(st_space[0]));
2460 if (dst->ret)
2461 return;
2462 setfpxreg(task, start, dst->pos, buf);
2463 if (dst->count == 0)
2464 return;
2465 }
2466 if (dst->pos < OFFSET(xmm_space[0])) {
2467 struct pt_regs *pt;
2468 int tos;
2469 pt = task_pt_regs(task);
2470 tos = (task->thread.fsr >> 11) & 7;
2471 start = (dst->pos - OFFSET(st_space[0])) / 16;
2472 dst->ret = user_regset_copyin(&dst->pos, &dst->count,
2473 &dst->u.set.kbuf, &dst->u.set.ubuf,
2474 buf, OFFSET(st_space[0]), OFFSET(xmm_space[0]));
2475 if (dst->ret)
2476 return;
2477 end = (dst->pos - OFFSET(st_space[0])) / 16;
2478 for (; start < end; start++)
2479 access_fpreg_ia32(start, buf + 16 * start, pt, info->sw,
2480 tos, 1);
2481 if (dst->count == 0)
2482 return;
2483 }
2484 if (dst->pos < OFFSET(padding[0]))
2485 dst->ret = user_regset_copyin(&dst->pos, &dst->count,
2486 &dst->u.set.kbuf, &dst->u.set.ubuf,
2487 &info->sw->f16, OFFSET(xmm_space[0]),
2488 OFFSET(padding[0]));
2489}
2490#undef OFFSET
2491
2492static int do_regset_call(void (*call)(struct unw_frame_info *, void *),
2493 struct task_struct *target,
2494 const struct user_regset *regset,
2495 unsigned int pos, unsigned int count,
2496 const void *kbuf, const void __user *ubuf)
2497{
2498 struct regset_getset info = { .target = target, .regset = regset,
2499 .pos = pos, .count = count,
2500 .u.set = { .kbuf = kbuf, .ubuf = ubuf },
2501 .ret = 0 };
2502
2503 if (target == current)
2504 unw_init_running(call, &info);
2505 else {
2506 struct unw_frame_info ufi;
2507 memset(&ufi, 0, sizeof(ufi));
2508 unw_init_from_blocked_task(&ufi, target);
2509 (*call)(&ufi, &info);
2510 }
2511
2512 return info.ret;
2513}
2514
2515static int ia32_fpregs_get(struct task_struct *target,
2516 const struct user_regset *regset,
2517 unsigned int pos, unsigned int count,
2518 void *kbuf, void __user *ubuf)
2519{
2520 return do_regset_call(do_fpregs_get, target, regset, pos, count,
2521 kbuf, ubuf);
2522}
2523
2524static int ia32_fpregs_set(struct task_struct *target,
2525 const struct user_regset *regset,
2526 unsigned int pos, unsigned int count,
2527 const void *kbuf, const void __user *ubuf)
2528{
2529 return do_regset_call(do_fpregs_set, target, regset, pos, count,
2530 kbuf, ubuf);
2531}
2532
2533static int ia32_fpxregs_get(struct task_struct *target,
2534 const struct user_regset *regset,
2535 unsigned int pos, unsigned int count,
2536 void *kbuf, void __user *ubuf)
2537{
2538 return do_regset_call(do_fpxregs_get, target, regset, pos, count,
2539 kbuf, ubuf);
2540}
2541
2542static int ia32_fpxregs_set(struct task_struct *target,
2543 const struct user_regset *regset,
2544 unsigned int pos, unsigned int count,
2545 const void *kbuf, const void __user *ubuf)
2546{
2547 return do_regset_call(do_fpxregs_set, target, regset, pos, count,
2548 kbuf, ubuf);
2549}
2550
2551static int ia32_genregs_get(struct task_struct *target,
2552 const struct user_regset *regset,
2553 unsigned int pos, unsigned int count,
2554 void *kbuf, void __user *ubuf)
2555{
2556 if (kbuf) {
2557 u32 *kp = kbuf;
2558 while (count > 0) {
2559 *kp++ = getreg(target, pos);
2560 pos += 4;
2561 count -= 4;
2562 }
2563 } else {
2564 u32 __user *up = ubuf;
2565 while (count > 0) {
2566 if (__put_user(getreg(target, pos), up++))
2567 return -EFAULT;
2568 pos += 4;
2569 count -= 4;
2570 }
2571 }
2572 return 0;
2573}
2574
2575static int ia32_genregs_set(struct task_struct *target,
2576 const struct user_regset *regset,
2577 unsigned int pos, unsigned int count,
2578 const void *kbuf, const void __user *ubuf)
2579{
2580 int ret = 0;
2581
2582 if (kbuf) {
2583 const u32 *kp = kbuf;
2584 while (!ret && count > 0) {
2585 putreg(target, pos, *kp++);
2586 pos += 4;
2587 count -= 4;
2588 }
2589 } else {
2590 const u32 __user *up = ubuf;
2591 u32 val;
2592 while (!ret && count > 0) {
2593 ret = __get_user(val, up++);
2594 if (!ret)
2595 putreg(target, pos, val);
2596 pos += 4;
2597 count -= 4;
2598 }
2599 }
2600 return ret;
2601}
2602
2603static int ia32_tls_active(struct task_struct *target,
2604 const struct user_regset *regset)
2605{
2606 struct thread_struct *t = &target->thread;
2607 int n = GDT_ENTRY_TLS_ENTRIES;
2608 while (n > 0 && desc_empty(&t->tls_array[n -1]))
2609 --n;
2610 return n;
2611}
2612
2613static int ia32_tls_get(struct task_struct *target,
2614 const struct user_regset *regset, unsigned int pos,
2615 unsigned int count, void *kbuf, void __user *ubuf)
2616{
2617 const struct desc_struct *tls;
2618
2619 if (pos > GDT_ENTRY_TLS_ENTRIES * sizeof(struct ia32_user_desc) ||
2620 (pos % sizeof(struct ia32_user_desc)) != 0 ||
2621 (count % sizeof(struct ia32_user_desc)) != 0)
2622 return -EINVAL;
2623
2624 pos /= sizeof(struct ia32_user_desc);
2625 count /= sizeof(struct ia32_user_desc);
2626
2627 tls = &target->thread.tls_array[pos];
2628
2629 if (kbuf) {
2630 struct ia32_user_desc *info = kbuf;
2631 while (count-- > 0)
2632 fill_user_desc(info++, GDT_ENTRY_TLS_MIN + pos++,
2633 tls++);
2634 } else {
2635 struct ia32_user_desc __user *u_info = ubuf;
2636 while (count-- > 0) {
2637 struct ia32_user_desc info;
2638 fill_user_desc(&info, GDT_ENTRY_TLS_MIN + pos++, tls++);
2639 if (__copy_to_user(u_info++, &info, sizeof(info)))
2640 return -EFAULT;
2641 }
2642 }
2643
2644 return 0;
2645}
2646
2647static int ia32_tls_set(struct task_struct *target,
2648 const struct user_regset *regset, unsigned int pos,
2649 unsigned int count, const void *kbuf, const void __user *ubuf)
2650{
2651 struct ia32_user_desc infobuf[GDT_ENTRY_TLS_ENTRIES];
2652 const struct ia32_user_desc *info;
2653
2654 if (pos > GDT_ENTRY_TLS_ENTRIES * sizeof(struct ia32_user_desc) ||
2655 (pos % sizeof(struct ia32_user_desc)) != 0 ||
2656 (count % sizeof(struct ia32_user_desc)) != 0)
2657 return -EINVAL;
2658
2659 if (kbuf)
2660 info = kbuf;
2661 else if (__copy_from_user(infobuf, ubuf, count))
2662 return -EFAULT;
2663 else
2664 info = infobuf;
2665
2666 set_tls_desc(target,
2667 GDT_ENTRY_TLS_MIN + (pos / sizeof(struct ia32_user_desc)),
2668 info, count / sizeof(struct ia32_user_desc));
2669
2670 return 0;
2671}
2672
2673/*
2674 * This should match arch/i386/kernel/ptrace.c:native_regsets.
2675 * XXX ioperm? vm86?
2676 */
2677static const struct user_regset ia32_regsets[] = {
2678 {
2679 .core_note_type = NT_PRSTATUS,
2680 .n = sizeof(struct user_regs_struct32)/4,
2681 .size = 4, .align = 4,
2682 .get = ia32_genregs_get, .set = ia32_genregs_set
2683 },
2684 {
2685 .core_note_type = NT_PRFPREG,
2686 .n = sizeof(struct ia32_user_i387_struct) / 4,
2687 .size = 4, .align = 4,
2688 .get = ia32_fpregs_get, .set = ia32_fpregs_set
2689 },
2690 {
2691 .core_note_type = NT_PRXFPREG,
2692 .n = sizeof(struct ia32_user_fxsr_struct) / 4,
2693 .size = 4, .align = 4,
2694 .get = ia32_fpxregs_get, .set = ia32_fpxregs_set
2695 },
2696 {
2697 .core_note_type = NT_386_TLS,
2698 .n = GDT_ENTRY_TLS_ENTRIES,
2699 .bias = GDT_ENTRY_TLS_MIN,
2700 .size = sizeof(struct ia32_user_desc),
2701 .align = sizeof(struct ia32_user_desc),
2702 .active = ia32_tls_active,
2703 .get = ia32_tls_get, .set = ia32_tls_set,
2704 },
2705};
2706
2707const struct user_regset_view user_ia32_view = {
2708 .name = "i386", .e_machine = EM_386,
2709 .regsets = ia32_regsets, .n = ARRAY_SIZE(ia32_regsets)
2710};
2711
2712long sys32_fadvise64_64(int fd, __u32 offset_low, __u32 offset_high,
2713 __u32 len_low, __u32 len_high, int advice)
2714{
2715 return sys_fadvise64_64(fd,
2716 (((u64)offset_high)<<32) | offset_low,
2717 (((u64)len_high)<<32) | len_low,
2718 advice);
2719}
2720
2721#ifdef NOTYET /* UNTESTED FOR IA64 FROM HERE DOWN */
2722
2723asmlinkage long sys32_setreuid(compat_uid_t ruid, compat_uid_t euid)
2724{
2725 uid_t sruid, seuid;
2726
2727 sruid = (ruid == (compat_uid_t)-1) ? ((uid_t)-1) : ((uid_t)ruid);
2728 seuid = (euid == (compat_uid_t)-1) ? ((uid_t)-1) : ((uid_t)euid);
2729 return sys_setreuid(sruid, seuid);
2730}
2731
2732asmlinkage long
2733sys32_setresuid(compat_uid_t ruid, compat_uid_t euid,
2734 compat_uid_t suid)
2735{
2736 uid_t sruid, seuid, ssuid;
2737
2738 sruid = (ruid == (compat_uid_t)-1) ? ((uid_t)-1) : ((uid_t)ruid);
2739 seuid = (euid == (compat_uid_t)-1) ? ((uid_t)-1) : ((uid_t)euid);
2740 ssuid = (suid == (compat_uid_t)-1) ? ((uid_t)-1) : ((uid_t)suid);
2741 return sys_setresuid(sruid, seuid, ssuid);
2742}
2743
2744asmlinkage long
2745sys32_setregid(compat_gid_t rgid, compat_gid_t egid)
2746{
2747 gid_t srgid, segid;
2748
2749 srgid = (rgid == (compat_gid_t)-1) ? ((gid_t)-1) : ((gid_t)rgid);
2750 segid = (egid == (compat_gid_t)-1) ? ((gid_t)-1) : ((gid_t)egid);
2751 return sys_setregid(srgid, segid);
2752}
2753
2754asmlinkage long
2755sys32_setresgid(compat_gid_t rgid, compat_gid_t egid,
2756 compat_gid_t sgid)
2757{
2758 gid_t srgid, segid, ssgid;
2759
2760 srgid = (rgid == (compat_gid_t)-1) ? ((gid_t)-1) : ((gid_t)rgid);
2761 segid = (egid == (compat_gid_t)-1) ? ((gid_t)-1) : ((gid_t)egid);
2762 ssgid = (sgid == (compat_gid_t)-1) ? ((gid_t)-1) : ((gid_t)sgid);
2763 return sys_setresgid(srgid, segid, ssgid);
2764}
2765#endif /* NOTYET */
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-16 18:59:54 -0500