1 /* sys_sparc32.c: Conversion between 32bit and 64bit native syscalls. 2 * 3 * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz) 4 * Copyright (C) 1997, 2007 David S. Miller (davem@davemloft.net) 5 * 6 * These routines maintain argument size conversion between 32bit and 64bit 7 * environment. 8 */ 9 10 #include <linux/kernel.h> 11 #include <linux/sched.h> 12 #include <linux/capability.h> 13 #include <linux/fs.h> 14 #include <linux/mm.h> 15 #include <linux/file.h> 16 #include <linux/signal.h> 17 #include <linux/resource.h> 18 #include <linux/times.h> 19 #include <linux/smp.h> 20 #include <linux/sem.h> 21 #include <linux/msg.h> 22 #include <linux/shm.h> 23 #include <linux/uio.h> 24 #include <linux/nfs_fs.h> 25 #include <linux/quota.h> 26 #include <linux/poll.h> 27 #include <linux/personality.h> 28 #include <linux/stat.h> 29 #include <linux/filter.h> 30 #include <linux/highmem.h> 31 #include <linux/highuid.h> 32 #include <linux/mman.h> 33 #include <linux/ipv6.h> 34 #include <linux/in.h> 35 #include <linux/icmpv6.h> 36 #include <linux/syscalls.h> 37 #include <linux/sysctl.h> 38 #include <linux/binfmts.h> 39 #include <linux/dnotify.h> 40 #include <linux/security.h> 41 #include <linux/compat.h> 42 #include <linux/vfs.h> 43 #include <linux/ptrace.h> 44 #include <linux/slab.h> 45 46 #include <asm/types.h> 47 #include <asm/uaccess.h> 48 #include <asm/fpumacro.h> 49 #include <asm/mmu_context.h> 50 #include <asm/compat_signal.h> 51 52 #ifdef CONFIG_SYSVIPC 53 asmlinkage long compat_sys_ipc(u32 call, u32 first, u32 second, u32 third, compat_uptr_t ptr, u32 fifth) 54 { 55 int version; 56 57 version = call >> 16; /* hack for backward compatibility */ 58 call &= 0xffff; 59 60 switch (call) { 61 case SEMTIMEDOP: 62 if (fifth) 63 /* sign extend semid */ 64 return compat_sys_semtimedop((int)first, 65 compat_ptr(ptr), second, 66 compat_ptr(fifth)); 67 /* else fall through for normal semop() */ 68 case SEMOP: 69 /* struct sembuf is the same on 32 and 64bit :)) */ 70 /* sign extend semid */ 71 return sys_semtimedop((int)first, compat_ptr(ptr), second, 72 NULL); 73 case SEMGET: 74 /* sign extend key, nsems */ 75 return sys_semget((int)first, (int)second, third); 76 case SEMCTL: 77 /* sign extend semid, semnum */ 78 return compat_sys_semctl((int)first, (int)second, third, 79 compat_ptr(ptr)); 80 81 case MSGSND: 82 /* sign extend msqid */ 83 return compat_sys_msgsnd((int)first, (int)second, third, 84 compat_ptr(ptr)); 85 case MSGRCV: 86 /* sign extend msqid, msgtyp */ 87 return compat_sys_msgrcv((int)first, second, (int)fifth, 88 third, version, compat_ptr(ptr)); 89 case MSGGET: 90 /* sign extend key */ 91 return sys_msgget((int)first, second); 92 case MSGCTL: 93 /* sign extend msqid */ 94 return compat_sys_msgctl((int)first, second, compat_ptr(ptr)); 95 96 case SHMAT: 97 /* sign extend shmid */ 98 return compat_sys_shmat((int)first, second, third, version, 99 compat_ptr(ptr)); 100 case SHMDT: 101 return sys_shmdt(compat_ptr(ptr)); 102 case SHMGET: 103 /* sign extend key_t */ 104 return sys_shmget((int)first, second, third); 105 case SHMCTL: 106 /* sign extend shmid */ 107 return compat_sys_shmctl((int)first, second, compat_ptr(ptr)); 108 109 default: 110 return -ENOSYS; 111 } 112 113 return -ENOSYS; 114 } 115 #endif 116 117 asmlinkage long sys32_truncate64(const char __user * path, unsigned long high, unsigned long low) 118 { 119 if ((int)high < 0) 120 return -EINVAL; 121 else 122 return sys_truncate(path, (high << 32) | low); 123 } 124 125 asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long high, unsigned long low) 126 { 127 if ((int)high < 0) 128 return -EINVAL; 129 else 130 return sys_ftruncate(fd, (high << 32) | low); 131 } 132 133 static int cp_compat_stat64(struct kstat *stat, 134 struct compat_stat64 __user *statbuf) 135 { 136 int err; 137 138 err = put_user(huge_encode_dev(stat->dev), &statbuf->st_dev); 139 err |= put_user(stat->ino, &statbuf->st_ino); 140 err |= put_user(stat->mode, &statbuf->st_mode); 141 err |= put_user(stat->nlink, &statbuf->st_nlink); 142 err |= put_user(from_kuid_munged(current_user_ns(), stat->uid), &statbuf->st_uid); 143 err |= put_user(from_kgid_munged(current_user_ns(), stat->gid), &statbuf->st_gid); 144 err |= put_user(huge_encode_dev(stat->rdev), &statbuf->st_rdev); 145 err |= put_user(0, (unsigned long __user *) &statbuf->__pad3[0]); 146 err |= put_user(stat->size, &statbuf->st_size); 147 err |= put_user(stat->blksize, &statbuf->st_blksize); 148 err |= put_user(0, (unsigned int __user *) &statbuf->__pad4[0]); 149 err |= put_user(0, (unsigned int __user *) &statbuf->__pad4[4]); 150 err |= put_user(stat->blocks, &statbuf->st_blocks); 151 err |= put_user(stat->atime.tv_sec, &statbuf->st_atime); 152 err |= put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec); 153 err |= put_user(stat->mtime.tv_sec, &statbuf->st_mtime); 154 err |= put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec); 155 err |= put_user(stat->ctime.tv_sec, &statbuf->st_ctime); 156 err |= put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec); 157 err |= put_user(0, &statbuf->__unused4); 158 err |= put_user(0, &statbuf->__unused5); 159 160 return err; 161 } 162 163 asmlinkage long compat_sys_stat64(const char __user * filename, 164 struct compat_stat64 __user *statbuf) 165 { 166 struct kstat stat; 167 int error = vfs_stat(filename, &stat); 168 169 if (!error) 170 error = cp_compat_stat64(&stat, statbuf); 171 return error; 172 } 173 174 asmlinkage long compat_sys_lstat64(const char __user * filename, 175 struct compat_stat64 __user *statbuf) 176 { 177 struct kstat stat; 178 int error = vfs_lstat(filename, &stat); 179 180 if (!error) 181 error = cp_compat_stat64(&stat, statbuf); 182 return error; 183 } 184 185 asmlinkage long compat_sys_fstat64(unsigned int fd, 186 struct compat_stat64 __user * statbuf) 187 { 188 struct kstat stat; 189 int error = vfs_fstat(fd, &stat); 190 191 if (!error) 192 error = cp_compat_stat64(&stat, statbuf); 193 return error; 194 } 195 196 asmlinkage long compat_sys_fstatat64(unsigned int dfd, 197 const char __user *filename, 198 struct compat_stat64 __user * statbuf, int flag) 199 { 200 struct kstat stat; 201 int error; 202 203 error = vfs_fstatat(dfd, filename, &stat, flag); 204 if (error) 205 return error; 206 return cp_compat_stat64(&stat, statbuf); 207 } 208 209 COMPAT_SYSCALL_DEFINE3(sparc_sigaction, int, sig, 210 struct compat_old_sigaction __user *,act, 211 struct compat_old_sigaction __user *,oact) 212 { 213 WARN_ON_ONCE(sig >= 0); 214 return compat_sys_sigaction(-sig, act, oact); 215 } 216 217 COMPAT_SYSCALL_DEFINE5(rt_sigaction, int, sig, 218 struct compat_sigaction __user *,act, 219 struct compat_sigaction __user *,oact, 220 void __user *,restorer, 221 compat_size_t,sigsetsize) 222 { 223 struct k_sigaction new_ka, old_ka; 224 int ret; 225 compat_sigset_t set32; 226 227 /* XXX: Don't preclude handling different sized sigset_t's. */ 228 if (sigsetsize != sizeof(compat_sigset_t)) 229 return -EINVAL; 230 231 if (act) { 232 u32 u_handler, u_restorer; 233 234 new_ka.ka_restorer = restorer; 235 ret = get_user(u_handler, &act->sa_handler); 236 new_ka.sa.sa_handler = compat_ptr(u_handler); 237 ret |= __copy_from_user(&set32, &act->sa_mask, sizeof(compat_sigset_t)); 238 sigset_from_compat(&new_ka.sa.sa_mask, &set32); 239 ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags); 240 ret |= __get_user(u_restorer, &act->sa_restorer); 241 new_ka.sa.sa_restorer = compat_ptr(u_restorer); 242 if (ret) 243 return -EFAULT; 244 } 245 246 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); 247 248 if (!ret && oact) { 249 sigset_to_compat(&set32, &old_ka.sa.sa_mask); 250 ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler); 251 ret |= __copy_to_user(&oact->sa_mask, &set32, sizeof(compat_sigset_t)); 252 ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags); 253 ret |= __put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer); 254 if (ret) 255 ret = -EFAULT; 256 } 257 258 return ret; 259 } 260 261 asmlinkage compat_ssize_t sys32_pread64(unsigned int fd, 262 char __user *ubuf, 263 compat_size_t count, 264 unsigned long poshi, 265 unsigned long poslo) 266 { 267 return sys_pread64(fd, ubuf, count, (poshi << 32) | poslo); 268 } 269 270 asmlinkage compat_ssize_t sys32_pwrite64(unsigned int fd, 271 char __user *ubuf, 272 compat_size_t count, 273 unsigned long poshi, 274 unsigned long poslo) 275 { 276 return sys_pwrite64(fd, ubuf, count, (poshi << 32) | poslo); 277 } 278 279 asmlinkage long compat_sys_readahead(int fd, 280 unsigned long offhi, 281 unsigned long offlo, 282 compat_size_t count) 283 { 284 return sys_readahead(fd, (offhi << 32) | offlo, count); 285 } 286 287 long compat_sys_fadvise64(int fd, 288 unsigned long offhi, 289 unsigned long offlo, 290 compat_size_t len, int advice) 291 { 292 return sys_fadvise64_64(fd, (offhi << 32) | offlo, len, advice); 293 } 294 295 long compat_sys_fadvise64_64(int fd, 296 unsigned long offhi, unsigned long offlo, 297 unsigned long lenhi, unsigned long lenlo, 298 int advice) 299 { 300 return sys_fadvise64_64(fd, 301 (offhi << 32) | offlo, 302 (lenhi << 32) | lenlo, 303 advice); 304 } 305 306 long sys32_lookup_dcookie(unsigned long cookie_high, 307 unsigned long cookie_low, 308 char __user *buf, size_t len) 309 { 310 return sys_lookup_dcookie((cookie_high << 32) | cookie_low, 311 buf, len); 312 } 313 314 long compat_sync_file_range(int fd, unsigned long off_high, unsigned long off_low, unsigned long nb_high, unsigned long nb_low, int flags) 315 { 316 return sys_sync_file_range(fd, 317 (off_high << 32) | off_low, 318 (nb_high << 32) | nb_low, 319 flags); 320 } 321 322 asmlinkage long compat_sys_fallocate(int fd, int mode, u32 offhi, u32 offlo, 323 u32 lenhi, u32 lenlo) 324 { 325 return sys_fallocate(fd, mode, ((loff_t)offhi << 32) | offlo, 326 ((loff_t)lenhi << 32) | lenlo); 327 } 328