Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * sys_parisc32.c: Conversion between 32bit and 64bit native syscalls. |
| 3 | * |
| 4 | * Copyright (C) 2000-2001 Hewlett Packard Company |
| 5 | * Copyright (C) 2000 John Marvin |
| 6 | * Copyright (C) 2001 Matthew Wilcox |
| 7 | * |
| 8 | * These routines maintain argument size conversion between 32bit and 64bit |
| 9 | * environment. Based heavily on sys_ia32.c and sys_sparc32.c. |
| 10 | */ |
| 11 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | #include <linux/compat.h> |
| 13 | #include <linux/kernel.h> |
| 14 | #include <linux/sched.h> |
| 15 | #include <linux/fs.h> |
| 16 | #include <linux/mm.h> |
| 17 | #include <linux/file.h> |
| 18 | #include <linux/signal.h> |
| 19 | #include <linux/resource.h> |
| 20 | #include <linux/times.h> |
| 21 | #include <linux/utsname.h> |
| 22 | #include <linux/time.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | #include <linux/smp.h> |
| 24 | #include <linux/smp_lock.h> |
| 25 | #include <linux/sem.h> |
| 26 | #include <linux/msg.h> |
| 27 | #include <linux/shm.h> |
| 28 | #include <linux/slab.h> |
| 29 | #include <linux/uio.h> |
| 30 | #include <linux/nfs_fs.h> |
| 31 | #include <linux/ncp_fs.h> |
| 32 | #include <linux/sunrpc/svc.h> |
| 33 | #include <linux/nfsd/nfsd.h> |
| 34 | #include <linux/nfsd/cache.h> |
| 35 | #include <linux/nfsd/xdr.h> |
| 36 | #include <linux/nfsd/syscall.h> |
| 37 | #include <linux/poll.h> |
| 38 | #include <linux/personality.h> |
| 39 | #include <linux/stat.h> |
| 40 | #include <linux/highmem.h> |
| 41 | #include <linux/highuid.h> |
| 42 | #include <linux/mman.h> |
| 43 | #include <linux/binfmts.h> |
| 44 | #include <linux/namei.h> |
| 45 | #include <linux/vfs.h> |
| 46 | #include <linux/ptrace.h> |
| 47 | #include <linux/swap.h> |
| 48 | #include <linux/syscalls.h> |
| 49 | |
| 50 | #include <asm/types.h> |
| 51 | #include <asm/uaccess.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | #include <asm/mmu_context.h> |
| 53 | |
| 54 | #include "sys32.h" |
| 55 | |
| 56 | #undef DEBUG |
| 57 | |
| 58 | #ifdef DEBUG |
| 59 | #define DBG(x) printk x |
| 60 | #else |
| 61 | #define DBG(x) |
| 62 | #endif |
| 63 | |
| 64 | /* |
| 65 | * sys32_execve() executes a new program. |
| 66 | */ |
| 67 | |
| 68 | asmlinkage int sys32_execve(struct pt_regs *regs) |
| 69 | { |
| 70 | int error; |
| 71 | char *filename; |
| 72 | |
| 73 | DBG(("sys32_execve(%p) r26 = 0x%lx\n", regs, regs->gr[26])); |
| 74 | filename = getname((const char __user *) regs->gr[26]); |
| 75 | error = PTR_ERR(filename); |
| 76 | if (IS_ERR(filename)) |
| 77 | goto out; |
| 78 | error = compat_do_execve(filename, compat_ptr(regs->gr[25]), |
| 79 | compat_ptr(regs->gr[24]), regs); |
| 80 | if (error == 0) { |
| 81 | task_lock(current); |
| 82 | current->ptrace &= ~PT_DTRACE; |
| 83 | task_unlock(current); |
| 84 | } |
| 85 | putname(filename); |
| 86 | out: |
| 87 | |
| 88 | return error; |
| 89 | } |
| 90 | |
| 91 | asmlinkage long sys32_unimplemented(int r26, int r25, int r24, int r23, |
| 92 | int r22, int r21, int r20) |
| 93 | { |
| 94 | printk(KERN_ERR "%s(%d): Unimplemented 32 on 64 syscall #%d!\n", |
| 95 | current->comm, current->pid, r20); |
| 96 | return -ENOSYS; |
| 97 | } |
| 98 | |
| 99 | #ifdef CONFIG_SYSCTL |
| 100 | |
| 101 | struct __sysctl_args32 { |
| 102 | u32 name; |
| 103 | int nlen; |
| 104 | u32 oldval; |
| 105 | u32 oldlenp; |
| 106 | u32 newval; |
| 107 | u32 newlen; |
| 108 | u32 __unused[4]; |
| 109 | }; |
| 110 | |
| 111 | asmlinkage long sys32_sysctl(struct __sysctl_args32 __user *args) |
| 112 | { |
Matthew Wilcox | 17cca07 | 2006-10-04 13:16:10 -0600 | [diff] [blame] | 113 | #ifndef CONFIG_SYSCTL_SYSCALL |
| 114 | return -ENOSYS; |
| 115 | #else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 116 | struct __sysctl_args32 tmp; |
| 117 | int error; |
| 118 | unsigned int oldlen32; |
Matthew Wilcox | 17cca07 | 2006-10-04 13:16:10 -0600 | [diff] [blame] | 119 | size_t oldlen, __user *oldlenp = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | unsigned long addr = (((long __force)&args->__unused[0]) + 7) & ~7; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | |
| 122 | DBG(("sysctl32(%p)\n", args)); |
| 123 | |
| 124 | if (copy_from_user(&tmp, args, sizeof(tmp))) |
| 125 | return -EFAULT; |
| 126 | |
| 127 | if (tmp.oldval && tmp.oldlenp) { |
| 128 | /* Duh, this is ugly and might not work if sysctl_args |
| 129 | is in read-only memory, but do_sysctl does indirectly |
| 130 | a lot of uaccess in both directions and we'd have to |
| 131 | basically copy the whole sysctl.c here, and |
| 132 | glibc's __sysctl uses rw memory for the structure |
| 133 | anyway. */ |
| 134 | /* a possibly better hack than this, which will avoid the |
| 135 | * problem if the struct is read only, is to push the |
| 136 | * 'oldlen' value out to the user's stack instead. -PB |
| 137 | */ |
| 138 | if (get_user(oldlen32, (u32 *)(u64)tmp.oldlenp)) |
| 139 | return -EFAULT; |
| 140 | oldlen = oldlen32; |
| 141 | if (put_user(oldlen, (size_t *)addr)) |
| 142 | return -EFAULT; |
| 143 | oldlenp = (size_t *)addr; |
| 144 | } |
| 145 | |
| 146 | lock_kernel(); |
Matthew Wilcox | 17cca07 | 2006-10-04 13:16:10 -0600 | [diff] [blame] | 147 | error = do_sysctl((int __user *)(u64)tmp.name, tmp.nlen, |
| 148 | (void __user *)(u64)tmp.oldval, oldlenp, |
| 149 | (void __user *)(u64)tmp.newval, tmp.newlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | unlock_kernel(); |
| 151 | if (oldlenp) { |
| 152 | if (!error) { |
| 153 | if (get_user(oldlen, (size_t *)addr)) { |
| 154 | error = -EFAULT; |
| 155 | } else { |
| 156 | oldlen32 = oldlen; |
| 157 | if (put_user(oldlen32, (u32 *)(u64)tmp.oldlenp)) |
| 158 | error = -EFAULT; |
| 159 | } |
| 160 | } |
Matthew Wilcox | 17cca07 | 2006-10-04 13:16:10 -0600 | [diff] [blame] | 161 | if (copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | error = -EFAULT; |
| 163 | } |
| 164 | return error; |
Matthew Wilcox | 17cca07 | 2006-10-04 13:16:10 -0600 | [diff] [blame] | 165 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | } |
| 167 | |
| 168 | #endif /* CONFIG_SYSCTL */ |
| 169 | |
| 170 | asmlinkage long sys32_sched_rr_get_interval(pid_t pid, |
| 171 | struct compat_timespec __user *interval) |
| 172 | { |
| 173 | struct timespec t; |
| 174 | int ret; |
| 175 | |
| 176 | KERNEL_SYSCALL(ret, sys_sched_rr_get_interval, pid, (struct timespec __user *)&t); |
| 177 | if (put_compat_timespec(&t, interval)) |
| 178 | return -EFAULT; |
| 179 | return ret; |
| 180 | } |
| 181 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | /*** copied from mips64 ***/ |
| 183 | /* |
| 184 | * Ooo, nasty. We need here to frob 32-bit unsigned longs to |
| 185 | * 64-bit unsigned longs. |
| 186 | */ |
| 187 | |
| 188 | static inline int |
| 189 | get_fd_set32(unsigned long n, u32 *ufdset, unsigned long *fdset) |
| 190 | { |
| 191 | n = (n + 8*sizeof(u32) - 1) / (8*sizeof(u32)); |
| 192 | if (ufdset) { |
| 193 | unsigned long odd; |
| 194 | |
| 195 | if (!access_ok(VERIFY_WRITE, ufdset, n*sizeof(u32))) |
| 196 | return -EFAULT; |
| 197 | |
| 198 | odd = n & 1UL; |
| 199 | n &= ~1UL; |
| 200 | while (n) { |
| 201 | unsigned long h, l; |
| 202 | __get_user(l, ufdset); |
| 203 | __get_user(h, ufdset+1); |
| 204 | ufdset += 2; |
| 205 | *fdset++ = h << 32 | l; |
| 206 | n -= 2; |
| 207 | } |
| 208 | if (odd) |
| 209 | __get_user(*fdset, ufdset); |
| 210 | } else { |
| 211 | /* Tricky, must clear full unsigned long in the |
| 212 | * kernel fdset at the end, this makes sure that |
| 213 | * actually happens. |
| 214 | */ |
| 215 | memset(fdset, 0, ((n + 1) & ~1)*sizeof(u32)); |
| 216 | } |
| 217 | return 0; |
| 218 | } |
| 219 | |
| 220 | static inline void |
| 221 | set_fd_set32(unsigned long n, u32 *ufdset, unsigned long *fdset) |
| 222 | { |
| 223 | unsigned long odd; |
| 224 | n = (n + 8*sizeof(u32) - 1) / (8*sizeof(u32)); |
| 225 | |
| 226 | if (!ufdset) |
| 227 | return; |
| 228 | |
| 229 | odd = n & 1UL; |
| 230 | n &= ~1UL; |
| 231 | while (n) { |
| 232 | unsigned long h, l; |
| 233 | l = *fdset++; |
| 234 | h = l >> 32; |
| 235 | __put_user(l, ufdset); |
| 236 | __put_user(h, ufdset+1); |
| 237 | ufdset += 2; |
| 238 | n -= 2; |
| 239 | } |
| 240 | if (odd) |
| 241 | __put_user(*fdset, ufdset); |
| 242 | } |
| 243 | |
| 244 | struct msgbuf32 { |
| 245 | int mtype; |
| 246 | char mtext[1]; |
| 247 | }; |
| 248 | |
| 249 | asmlinkage long sys32_msgsnd(int msqid, |
| 250 | struct msgbuf32 __user *umsgp32, |
| 251 | size_t msgsz, int msgflg) |
| 252 | { |
| 253 | struct msgbuf *mb; |
| 254 | struct msgbuf32 mb32; |
| 255 | int err; |
| 256 | |
| 257 | if ((mb = kmalloc(msgsz + sizeof *mb + 4, GFP_KERNEL)) == NULL) |
| 258 | return -ENOMEM; |
| 259 | |
| 260 | err = get_user(mb32.mtype, &umsgp32->mtype); |
| 261 | mb->mtype = mb32.mtype; |
| 262 | err |= copy_from_user(mb->mtext, &umsgp32->mtext, msgsz); |
| 263 | |
| 264 | if (err) |
| 265 | err = -EFAULT; |
| 266 | else |
| 267 | KERNEL_SYSCALL(err, sys_msgsnd, msqid, (struct msgbuf __user *)mb, msgsz, msgflg); |
| 268 | |
| 269 | kfree(mb); |
| 270 | return err; |
| 271 | } |
| 272 | |
| 273 | asmlinkage long sys32_msgrcv(int msqid, |
| 274 | struct msgbuf32 __user *umsgp32, |
| 275 | size_t msgsz, long msgtyp, int msgflg) |
| 276 | { |
| 277 | struct msgbuf *mb; |
| 278 | struct msgbuf32 mb32; |
| 279 | int err, len; |
| 280 | |
| 281 | if ((mb = kmalloc(msgsz + sizeof *mb + 4, GFP_KERNEL)) == NULL) |
| 282 | return -ENOMEM; |
| 283 | |
| 284 | KERNEL_SYSCALL(err, sys_msgrcv, msqid, (struct msgbuf __user *)mb, msgsz, msgtyp, msgflg); |
| 285 | |
| 286 | if (err >= 0) { |
| 287 | len = err; |
| 288 | mb32.mtype = mb->mtype; |
| 289 | err = put_user(mb32.mtype, &umsgp32->mtype); |
| 290 | err |= copy_to_user(&umsgp32->mtext, mb->mtext, len); |
| 291 | if (err) |
| 292 | err = -EFAULT; |
| 293 | else |
| 294 | err = len; |
| 295 | } |
| 296 | |
| 297 | kfree(mb); |
| 298 | return err; |
| 299 | } |
| 300 | |
| 301 | asmlinkage int sys32_sendfile(int out_fd, int in_fd, compat_off_t __user *offset, s32 count) |
| 302 | { |
| 303 | mm_segment_t old_fs = get_fs(); |
| 304 | int ret; |
| 305 | off_t of; |
| 306 | |
| 307 | if (offset && get_user(of, offset)) |
| 308 | return -EFAULT; |
| 309 | |
| 310 | set_fs(KERNEL_DS); |
| 311 | ret = sys_sendfile(out_fd, in_fd, offset ? (off_t __user *)&of : NULL, count); |
| 312 | set_fs(old_fs); |
| 313 | |
| 314 | if (offset && put_user(of, offset)) |
| 315 | return -EFAULT; |
| 316 | |
| 317 | return ret; |
| 318 | } |
| 319 | |
| 320 | asmlinkage int sys32_sendfile64(int out_fd, int in_fd, compat_loff_t __user *offset, s32 count) |
| 321 | { |
| 322 | mm_segment_t old_fs = get_fs(); |
| 323 | int ret; |
| 324 | loff_t lof; |
| 325 | |
| 326 | if (offset && get_user(lof, offset)) |
| 327 | return -EFAULT; |
| 328 | |
| 329 | set_fs(KERNEL_DS); |
| 330 | ret = sys_sendfile64(out_fd, in_fd, offset ? (loff_t __user *)&lof : NULL, count); |
| 331 | set_fs(old_fs); |
| 332 | |
| 333 | if (offset && put_user(lof, offset)) |
| 334 | return -EFAULT; |
| 335 | |
| 336 | return ret; |
| 337 | } |
| 338 | |
| 339 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 340 | /* lseek() needs a wrapper because 'offset' can be negative, but the top |
| 341 | * half of the argument has been zeroed by syscall.S. |
| 342 | */ |
| 343 | |
| 344 | asmlinkage int sys32_lseek(unsigned int fd, int offset, unsigned int origin) |
| 345 | { |
| 346 | return sys_lseek(fd, offset, origin); |
| 347 | } |
| 348 | |
| 349 | asmlinkage long sys32_semctl(int semid, int semnum, int cmd, union semun arg) |
| 350 | { |
| 351 | union semun u; |
| 352 | |
| 353 | if (cmd == SETVAL) { |
| 354 | /* Ugh. arg is a union of int,ptr,ptr,ptr, so is 8 bytes. |
| 355 | * The int should be in the first 4, but our argument |
| 356 | * frobbing has left it in the last 4. |
| 357 | */ |
| 358 | u.val = *((int *)&arg + 1); |
| 359 | return sys_semctl (semid, semnum, cmd, u); |
| 360 | } |
| 361 | return sys_semctl (semid, semnum, cmd, arg); |
| 362 | } |
| 363 | |
| 364 | long sys32_lookup_dcookie(u32 cookie_high, u32 cookie_low, char __user *buf, |
| 365 | size_t len) |
| 366 | { |
| 367 | return sys_lookup_dcookie((u64)cookie_high << 32 | cookie_low, |
| 368 | buf, len); |
| 369 | } |
Kyle McMartin | 2cfc5be | 2007-09-28 13:25:59 -0400 | [diff] [blame] | 370 | |
| 371 | asmlinkage long compat_sys_fallocate(int fd, int mode, u32 offhi, u32 offlo, |
| 372 | u32 lenhi, u32 lenlo) |
| 373 | { |
| 374 | return sys_fallocate(fd, mode, ((loff_t)offhi << 32) | offlo, |
| 375 | ((loff_t)lenhi << 32) | lenlo); |
| 376 | } |