Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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> |
KOSAKI Motohiro | 2d9b06c | 2008-03-04 15:45:42 -0800 | [diff] [blame] | 35 | #include <linux/socket.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | #include <linux/quota.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | #include <linux/poll.h> |
| 38 | #include <linux/eventpoll.h> |
| 39 | #include <linux/personality.h> |
| 40 | #include <linux/ptrace.h> |
Shaohua Li | 7552921 | 2008-02-28 16:09:33 +0800 | [diff] [blame] | 41 | #include <linux/regset.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | #include <linux/stat.h> |
| 43 | #include <linux/ipc.h> |
Randy Dunlap | a941564 | 2006-01-11 12:17:48 -0800 | [diff] [blame] | 44 | #include <linux/capability.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | #include <linux/compat.h> |
| 46 | #include <linux/vfs.h> |
| 47 | #include <linux/mman.h> |
Jes Sorensen | 92ff2ec | 2006-01-18 23:46:51 -0800 | [diff] [blame] | 48 | #include <linux/mutex.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | |
| 50 | #include <asm/intrinsics.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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: */ |
Jes Sorensen | 92ff2ec | 2006-01-18 23:46:51 -0800 | [diff] [blame] | 82 | static DEFINE_MUTEX(ia32_mmap_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | |
| 84 | asmlinkage long |
| 85 | sys32_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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | |
| 122 | #if PAGE_SHIFT > IA32_PAGE_SHIFT |
| 123 | |
| 124 | |
| 125 | static int |
| 126 | get_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 | */ |
| 146 | static unsigned long |
| 147 | mmap_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(¤t->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(¤t->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 */ |
Josef Sipek | b66ffad | 2006-12-08 02:37:09 -0800 | [diff] [blame] | 198 | inode = file->f_path.dentry->d_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
akpm@linux-foundation.org | 3b74d18 | 2007-07-24 19:44:55 -0700 | [diff] [blame] | 216 | /* SLAB cache for ia64_partial_page structures */ |
| 217 | struct kmem_cache *ia64_partial_page_cachep; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | |
| 219 | /* |
akpm@linux-foundation.org | 3b74d18 | 2007-07-24 19:44:55 -0700 | [diff] [blame] | 220 | * init ia64_partial_page_list. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | * return 0 means kmalloc fail. |
| 222 | */ |
akpm@linux-foundation.org | 3b74d18 | 2007-07-24 19:44:55 -0700 | [diff] [blame] | 223 | struct ia64_partial_page_list* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | ia32_init_pp_list(void) |
| 225 | { |
akpm@linux-foundation.org | 3b74d18 | 2007-07-24 19:44:55 -0700 | [diff] [blame] | 226 | struct ia64_partial_page_list *p; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | */ |
akpm@linux-foundation.org | 3b74d18 | 2007-07-24 19:44:55 -0700 | [diff] [blame] | 243 | static 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, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | struct rb_node **rb_parent) |
| 247 | { |
akpm@linux-foundation.org | 3b74d18 | 2007-07-24 19:44:55 -0700 | [diff] [blame] | 248 | struct ia64_partial_page *pp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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; |
akpm@linux-foundation.org | 3b74d18 | 2007-07-24 19:44:55 -0700 | [diff] [blame] | 260 | pp = rb_entry(__rb_parent, struct ia64_partial_page, pp_rb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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) |
akpm@linux-foundation.org | 3b74d18 | 2007-07-24 19:44:55 -0700 | [diff] [blame] | 277 | *pprev = rb_entry(rb_prev, struct ia64_partial_page, pp_rb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 278 | return NULL; |
| 279 | } |
| 280 | |
| 281 | /* |
| 282 | * insert @pp into @ppl. |
| 283 | */ |
| 284 | static void |
akpm@linux-foundation.org | 3b74d18 | 2007-07-24 19:44:55 -0700 | [diff] [blame] | 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) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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, |
akpm@linux-foundation.org | 3b74d18 | 2007-07-24 19:44:55 -0700 | [diff] [blame] | 297 | struct ia64_partial_page, pp_rb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | */ |
| 312 | static void |
akpm@linux-foundation.org | 3b74d18 | 2007-07-24 19:44:55 -0700 | [diff] [blame] | 313 | __ia32_delete_pp(struct ia64_partial_page_list *ppl, |
| 314 | struct ia64_partial_page *pp, struct ia64_partial_page *prev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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); |
akpm@linux-foundation.org | 3b74d18 | 2007-07-24 19:44:55 -0700 | [diff] [blame] | 326 | kmem_cache_free(ia64_partial_page_cachep, pp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 327 | } |
| 328 | |
akpm@linux-foundation.org | 3b74d18 | 2007-07-24 19:44:55 -0700 | [diff] [blame] | 329 | static struct ia64_partial_page * |
| 330 | __pp_prev(struct ia64_partial_page *pp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | { |
| 332 | struct rb_node *prev = rb_prev(&pp->pp_rb); |
| 333 | if (prev) |
akpm@linux-foundation.org | 3b74d18 | 2007-07-24 19:44:55 -0700 | [diff] [blame] | 334 | return rb_entry(prev, struct ia64_partial_page, pp_rb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | */ |
| 343 | static void |
| 344 | __ia32_delete_pp_range(unsigned int start, unsigned int end) |
| 345 | { |
akpm@linux-foundation.org | 3b74d18 | 2007-07-24 19:44:55 -0700 | [diff] [blame] | 346 | struct ia64_partial_page *pp, *prev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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) { |
akpm@linux-foundation.org | 3b74d18 | 2007-07-24 19:44:55 -0700 | [diff] [blame] | 364 | struct ia64_partial_page *tmp = pp->next; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | */ |
| 374 | static int |
| 375 | __ia32_set_pp(unsigned int start, unsigned int end, int flags) |
| 376 | { |
akpm@linux-foundation.org | 3b74d18 | 2007-07-24 19:44:55 -0700 | [diff] [blame] | 377 | struct ia64_partial_page *pp, *prev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
akpm@linux-foundation.org | 3b74d18 | 2007-07-24 19:44:55 -0700 | [diff] [blame] | 413 | /* new a ia64_partial_page */ |
| 414 | pp = kmem_cache_alloc(ia64_partial_page_cachep, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | */ |
| 431 | static void |
| 432 | ia32_set_pp(unsigned int start, unsigned int end, int flags) |
| 433 | { |
| 434 | down_write(¤t->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(¤t->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 | */ |
| 464 | static int |
| 465 | __ia32_unset_pp(unsigned int start, unsigned int end) |
| 466 | { |
akpm@linux-foundation.org | 3b74d18 | 2007-07-24 19:44:55 -0700 | [diff] [blame] | 467 | struct ia64_partial_page *pp, *prev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
akpm@linux-foundation.org | 3b74d18 | 2007-07-24 19:44:55 -0700 | [diff] [blame] | 495 | /* new a ia64_partial_page */ |
| 496 | pp = kmem_cache_alloc(ia64_partial_page_cachep, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | */ |
| 516 | static int |
| 517 | ia32_unset_pp(unsigned int *startp, unsigned int *endp) |
| 518 | { |
| 519 | unsigned int start = *startp, end = *endp; |
| 520 | int ret = 0; |
| 521 | |
| 522 | down_write(¤t->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(¤t->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 | */ |
| 565 | static int |
| 566 | __ia32_compare_pp(unsigned int start, unsigned int end) |
| 567 | { |
akpm@linux-foundation.org | 3b74d18 | 2007-07-24 19:44:55 -0700 | [diff] [blame] | 568 | struct ia64_partial_page *pp, *prev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | */ |
| 609 | static int |
| 610 | ia32_compare_pp(unsigned int *startp, unsigned int *endp) |
| 611 | { |
| 612 | unsigned int start = *startp, end = *endp; |
| 613 | int retval = 0; |
| 614 | |
| 615 | down_write(¤t->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(¤t->mm->mmap_sem); |
| 641 | return retval; |
| 642 | } |
| 643 | |
| 644 | static void |
akpm@linux-foundation.org | 3b74d18 | 2007-07-24 19:44:55 -0700 | [diff] [blame] | 645 | __ia32_drop_pp_list(struct ia64_partial_page_list *ppl) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 646 | { |
akpm@linux-foundation.org | 3b74d18 | 2007-07-24 19:44:55 -0700 | [diff] [blame] | 647 | struct ia64_partial_page *pp = ppl->pp_head; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 648 | |
| 649 | while (pp) { |
akpm@linux-foundation.org | 3b74d18 | 2007-07-24 19:44:55 -0700 | [diff] [blame] | 650 | struct ia64_partial_page *next = pp->next; |
| 651 | kmem_cache_free(ia64_partial_page_cachep, pp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 652 | pp = next; |
| 653 | } |
| 654 | |
| 655 | kfree(ppl); |
| 656 | } |
| 657 | |
| 658 | void |
akpm@linux-foundation.org | 3b74d18 | 2007-07-24 19:44:55 -0700 | [diff] [blame] | 659 | ia32_drop_ia64_partial_page_list(struct task_struct *task) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 660 | { |
akpm@linux-foundation.org | 3b74d18 | 2007-07-24 19:44:55 -0700 | [diff] [blame] | 661 | struct ia64_partial_page_list* ppl = task->thread.ppl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | */ |
| 670 | static int |
akpm@linux-foundation.org | 3b74d18 | 2007-07-24 19:44:55 -0700 | [diff] [blame] | 671 | __ia32_copy_pp_list(struct ia64_partial_page_list *ppl) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 672 | { |
akpm@linux-foundation.org | 3b74d18 | 2007-07-24 19:44:55 -0700 | [diff] [blame] | 673 | struct ia64_partial_page *pp, *tmp, *prev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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) { |
akpm@linux-foundation.org | 3b74d18 | 2007-07-24 19:44:55 -0700 | [diff] [blame] | 684 | tmp = kmem_cache_alloc(ia64_partial_page_cachep, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
| 696 | int |
akpm@linux-foundation.org | 3b74d18 | 2007-07-24 19:44:55 -0700 | [diff] [blame] | 697 | ia32_copy_ia64_partial_page_list(struct task_struct *p, |
| 698 | unsigned long clone_flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 699 | { |
| 700 | int retval = 0; |
| 701 | |
| 702 | if (clone_flags & CLONE_VM) { |
| 703 | atomic_inc(¤t->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(¤t->mm->mmap_sem); |
| 710 | { |
| 711 | retval = __ia32_copy_pp_list(p->thread.ppl); |
| 712 | } |
| 713 | up_write(¤t->mm->mmap_sem); |
| 714 | } |
| 715 | |
| 716 | return retval; |
| 717 | } |
| 718 | |
| 719 | static unsigned long |
| 720 | emulate_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", |
Alexey Dobriyan | 19c5870 | 2007-10-18 23:40:41 -0700 | [diff] [blame] | 737 | current->comm, task_pid_nr(current), start); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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", |
Alexey Dobriyan | 19c5870 | 2007-10-18 23:40:41 -0700 | [diff] [blame] | 750 | current->comm, task_pid_nr(current), end); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 " |
Alexey Dobriyan | 19c5870 | 2007-10-18 23:40:41 -0700 | [diff] [blame] | 780 | "(addr=0x%lx,off=0x%llx)\n", current->comm, task_pid_nr(current), start, off); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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(¤t->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(¤t->mm->mmap_sem); |
| 795 | |
| 796 | if (IS_ERR((void *) ret)) |
| 797 | return ret; |
| 798 | |
| 799 | if (!is_congruent) { |
| 800 | /* read the file contents */ |
Josef Sipek | b66ffad | 2006-12-08 02:37:09 -0800 | [diff] [blame] | 801 | inode = file->f_path.dentry->d_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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); |
| 815 | out: |
| 816 | return start; |
| 817 | } |
| 818 | |
| 819 | #endif /* PAGE_SHIFT > IA32_PAGE_SHIFT */ |
| 820 | |
| 821 | static inline unsigned int |
| 822 | get_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 | |
| 834 | unsigned long |
| 835 | ia32_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 | |
Al Viro | 0067bd8 | 2009-11-30 17:34:06 -0500 | [diff] [blame] | 861 | if (flags & MAP_HUGETLB) |
| 862 | return -ENOMEM; |
| 863 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 864 | #if PAGE_SHIFT > IA32_PAGE_SHIFT |
Jes Sorensen | 92ff2ec | 2006-01-18 23:46:51 -0800 | [diff] [blame] | 865 | mutex_lock(&ia32_mmap_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 866 | { |
| 867 | addr = emulate_mmap(file, addr, len, prot, flags, offset); |
| 868 | } |
Jes Sorensen | 92ff2ec | 2006-01-18 23:46:51 -0800 | [diff] [blame] | 869 | mutex_unlock(&ia32_mmap_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 870 | #else |
| 871 | down_write(¤t->mm->mmap_sem); |
| 872 | { |
| 873 | addr = do_mmap(file, addr, len, prot, flags, offset); |
| 874 | } |
| 875 | up_write(¤t->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 | |
| 886 | struct 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 | |
| 895 | asmlinkage long |
| 896 | sys32_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 | |
| 925 | asmlinkage long |
| 926 | sys32_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 | |
| 947 | asmlinkage long |
| 948 | sys32_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 | |
Jes Sorensen | 92ff2ec | 2006-01-18 23:46:51 -0800 | [diff] [blame] | 970 | mutex_lock(&ia32_mmap_mutex); |
| 971 | ret = sys_munmap(start, end - start); |
| 972 | mutex_unlock(&ia32_mmap_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | */ |
| 984 | static long |
| 985 | mprotect_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 | |
| 999 | asmlinkage long |
| 1000 | sys32_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 | |
Jes Sorensen | 92ff2ec | 2006-01-18 23:46:51 -0800 | [diff] [blame] | 1024 | mutex_lock(&ia32_mmap_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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: |
Jes Sorensen | 92ff2ec | 2006-01-18 23:46:51 -0800 | [diff] [blame] | 1048 | mutex_unlock(&ia32_mmap_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1049 | return retval; |
| 1050 | #endif |
| 1051 | } |
| 1052 | |
| 1053 | asmlinkage long |
| 1054 | sys32_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 | |
Jes Sorensen | 92ff2ec | 2006-01-18 23:46:51 -0800 | [diff] [blame] | 1092 | mutex_lock(&ia32_mmap_mutex); |
| 1093 | ret = sys_mremap(addr, old_len, new_len, flags, new_addr); |
| 1094 | mutex_unlock(&ia32_mmap_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1104 | asmlinkage unsigned long |
| 1105 | sys32_alarm (unsigned int seconds) |
| 1106 | { |
Thomas Gleixner | c08b8a4 | 2006-03-25 03:06:33 -0800 | [diff] [blame] | 1107 | return alarm_setitimer(seconds); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1108 | } |
| 1109 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1110 | struct 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 | |
| 1118 | asmlinkage long |
| 1119 | sys32_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 | |
| 1142 | asmlinkage long |
| 1143 | sys32_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 | |
| 1190 | asmlinkage long |
| 1191 | compat_sys_wait4 (compat_pid_t pid, compat_uint_t * stat_addr, int options, |
| 1192 | struct compat_rusage *ru); |
| 1193 | |
| 1194 | asmlinkage long |
| 1195 | sys32_waitpid (int pid, unsigned int *stat_addr, int options) |
| 1196 | { |
| 1197 | return compat_sys_wait4(pid, stat_addr, options, NULL); |
| 1198 | } |
| 1199 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
| 1221 | static unsigned int |
| 1222 | getreg (struct task_struct *child, int regno) |
| 1223 | { |
| 1224 | struct pt_regs *child_regs; |
| 1225 | |
Al Viro | 6450578 | 2006-01-12 01:06:06 -0800 | [diff] [blame] | 1226 | child_regs = task_pt_regs(child); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
| 1249 | static void |
| 1250 | putreg (struct task_struct *child, int regno, unsigned int value) |
| 1251 | { |
| 1252 | struct pt_regs *child_regs; |
| 1253 | |
Al Viro | 6450578 | 2006-01-12 01:06:06 -0800 | [diff] [blame] | 1254 | child_regs = task_pt_regs(child); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 |
Anand Gadiyar | fd589a8 | 2009-07-16 17:13:03 +0200 | [diff] [blame] | 1276 | "ia32.putreg: attempt to set invalid segment register %d = %x\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1277 | regno, value); |
| 1278 | break; |
| 1279 | default: |
| 1280 | printk(KERN_ERR "ia32.putreg: unknown register %d\n", regno); |
| 1281 | break; |
| 1282 | } |
| 1283 | } |
| 1284 | |
| 1285 | static void |
| 1286 | put_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 | |
| 1318 | static void |
| 1319 | get_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 | |
| 1348 | int |
| 1349 | save_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); |
Al Viro | 6450578 | 2006-01-12 01:06:06 -0800 | [diff] [blame] | 1370 | ptp = task_pt_regs(tsk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
| 1377 | static int |
| 1378 | restore_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); |
Al Viro | 6450578 | 2006-01-12 01:06:06 -0800 | [diff] [blame] | 1403 | ptp = task_pt_regs(tsk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
| 1410 | int |
| 1411 | save_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); |
Al Viro | 6450578 | 2006-01-12 01:06:06 -0800 | [diff] [blame] | 1434 | ptp = task_pt_regs(tsk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
| 1449 | static int |
| 1450 | restore_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); |
Al Viro | 6450578 | 2006-01-12 01:06:06 -0800 | [diff] [blame] | 1478 | ptp = task_pt_regs(tsk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Shaohua Li | 680973e | 2008-09-18 15:50:26 +0800 | [diff] [blame] | 1497 | long compat_arch_ptrace(struct task_struct *child, compat_long_t request, |
| 1498 | compat_ulong_t caddr, compat_ulong_t cdata) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1499 | { |
Shaohua Li | 680973e | 2008-09-18 15:50:26 +0800 | [diff] [blame] | 1500 | unsigned long addr = caddr; |
| 1501 | unsigned long data = cdata; |
| 1502 | unsigned int tmp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1503 | long i, ret; |
| 1504 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1505 | switch (request) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1570 | default: |
Shaohua Li | 680973e | 2008-09-18 15:50:26 +0800 | [diff] [blame] | 1571 | return compat_ptrace_request(child, request, caddr, cdata); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1572 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1573 | return ret; |
| 1574 | } |
| 1575 | |
| 1576 | typedef struct { |
| 1577 | unsigned int ss_sp; |
| 1578 | unsigned int ss_flags; |
| 1579 | unsigned int ss_size; |
| 1580 | } ia32_stack_t; |
| 1581 | |
| 1582 | asmlinkage long |
| 1583 | sys32_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); |
| 1610 | out: |
| 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 | |
| 1623 | asmlinkage int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1624 | sys32_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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1634 | asmlinkage long |
| 1635 | sys32_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 | |
| 1645 | asmlinkage long |
| 1646 | sys32_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 | |
| 1661 | asmlinkage long |
| 1662 | sys32_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 | |
| 1678 | asmlinkage long |
| 1679 | sys32_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 | |
| 1685 | static int |
| 1686 | groups16_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 | |
| 1700 | static int |
| 1701 | groups16_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 | |
| 1715 | asmlinkage long |
| 1716 | sys32_getgroups16 (int gidsetsize, short __user *grouplist) |
| 1717 | { |
David Howells | 86a264a | 2008-11-14 10:39:18 +1100 | [diff] [blame] | 1718 | const struct cred *cred = current_cred(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1719 | int i; |
| 1720 | |
| 1721 | if (gidsetsize < 0) |
| 1722 | return -EINVAL; |
| 1723 | |
David Howells | 86a264a | 2008-11-14 10:39:18 +1100 | [diff] [blame] | 1724 | i = cred->group_info->ngroups; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1725 | if (gidsetsize) { |
| 1726 | if (i > gidsetsize) { |
| 1727 | i = -EINVAL; |
| 1728 | goto out; |
| 1729 | } |
David Howells | 86a264a | 2008-11-14 10:39:18 +1100 | [diff] [blame] | 1730 | if (groups16_to_user(grouplist, cred->group_info)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1731 | i = -EFAULT; |
| 1732 | goto out; |
| 1733 | } |
| 1734 | } |
| 1735 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1736 | return i; |
| 1737 | } |
| 1738 | |
| 1739 | asmlinkage long |
| 1740 | sys32_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 | |
| 1765 | asmlinkage long |
| 1766 | sys32_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 | |
| 1771 | asmlinkage long |
| 1772 | sys32_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 | |
| 1777 | static int |
| 1778 | putstat64 (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 | |
| 1812 | asmlinkage long |
| 1813 | sys32_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 | |
| 1822 | asmlinkage long |
| 1823 | sys32_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 | |
| 1832 | asmlinkage long |
| 1833 | sys32_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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1842 | asmlinkage long |
| 1843 | sys32_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 | |
| 1857 | asmlinkage long |
| 1858 | sys32_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 | |
| 1863 | asmlinkage long |
| 1864 | sys32_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 | |
| 1869 | asmlinkage long |
| 1870 | sys32_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 | |
Tsuneo.Yoshioka@f-secure.com | 83b942b | 2005-09-12 18:49:24 +0200 | [diff] [blame] | 1883 | if (offset && put_user(of, offset)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1884 | return -EFAULT; |
| 1885 | |
| 1886 | return ret; |
| 1887 | } |
| 1888 | |
| 1889 | asmlinkage long |
| 1890 | sys32_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 | |
| 1902 | asmlinkage unsigned long |
| 1903 | sys32_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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1915 | /* Structure for ia32 emulation on ia64 */ |
| 1916 | struct epoll_event32 |
| 1917 | { |
| 1918 | u32 events; |
| 1919 | u32 data[2]; |
| 1920 | }; |
| 1921 | |
| 1922 | asmlinkage long |
| 1923 | sys32_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 | |
| 1946 | asmlinkage long |
| 1947 | sys32_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(); |
Peter Chubb | d8caebd | 2005-05-31 22:37:00 -0700 | [diff] [blame] | 1952 | int numevents, size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | */ |
| 2009 | static int |
| 2010 | get_free_idx (void) |
| 2011 | { |
| 2012 | struct thread_struct *t = ¤t->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 | |
Shaohua Li | 7552921 | 2008-02-28 16:09:33 +0800 | [diff] [blame] | 2021 | static 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 == ¤t->thread) |
| 2047 | load_TLS(t, cpu); |
| 2048 | |
| 2049 | put_cpu(); |
| 2050 | } |
| 2051 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2052 | /* |
| 2053 | * Set a given TLS descriptor: |
| 2054 | */ |
| 2055 | asmlinkage int |
| 2056 | sys32_set_thread_area (struct ia32_user_desc __user *u_info) |
| 2057 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2058 | struct ia32_user_desc info; |
Shaohua Li | 7552921 | 2008-02-28 16:09:33 +0800 | [diff] [blame] | 2059 | int idx; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Shaohua Li | 7552921 | 2008-02-28 16:09:33 +0800 | [diff] [blame] | 2079 | set_tls_desc(current, idx, &info, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Shaohua Li | 7552921 | 2008-02-28 16:09:33 +0800 | [diff] [blame] | 2103 | static 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2117 | asmlinkage int |
| 2118 | sys32_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; |
Shaohua Li | 7552921 | 2008-02-28 16:09:33 +0800 | [diff] [blame] | 2130 | fill_user_desc(&info, idx, desc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2131 | |
| 2132 | if (copy_to_user(u_info, &info, sizeof(info))) |
| 2133 | return -EFAULT; |
| 2134 | return 0; |
| 2135 | } |
| 2136 | |
Shaohua Li | 7552921 | 2008-02-28 16:09:33 +0800 | [diff] [blame] | 2137 | struct regset_get { |
| 2138 | void *kbuf; |
| 2139 | void __user *ubuf; |
| 2140 | }; |
| 2141 | |
| 2142 | struct regset_set { |
| 2143 | const void *kbuf; |
| 2144 | const void __user *ubuf; |
| 2145 | }; |
| 2146 | |
| 2147 | struct 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 | |
| 2159 | static 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 | |
| 2186 | static 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 | |
| 2209 | static 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 | |
| 2232 | static 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 | |
| 2274 | static 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))) |
| 2319 | static 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 | |
| 2356 | static 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 | |
| 2403 | static 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 | |
| 2445 | static 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 | |
| 2492 | static 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 | |
| 2515 | static 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 | |
| 2524 | static 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 | |
| 2533 | static 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 | |
| 2542 | static 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 | |
| 2551 | static 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 | |
| 2575 | static 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 | |
| 2603 | static 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 | |
| 2613 | static 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 | |
| 2647 | static 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 | */ |
| 2677 | static 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 | |
| 2707 | const 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2712 | long 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 | |
| 2723 | asmlinkage 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 | |
| 2732 | asmlinkage long |
| 2733 | sys32_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 | |
| 2744 | asmlinkage long |
| 2745 | sys32_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 | |
| 2754 | asmlinkage long |
| 2755 | sys32_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 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2765 | #endif /* NOTYET */ |