| 1 | /* $NetBSD: linux32_misc.c,v 1.25 2014/11/22 13:12:22 njoly Exp $ */ |
| 2 | |
| 3 | /*- |
| 4 | * Copyright (c) 1995, 1998, 1999 The NetBSD Foundation, Inc. |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * This code is derived from software contributed to The NetBSD Foundation |
| 8 | * by Frank van der Linden and Eric Haszlakiewicz; by Jason R. Thorpe |
| 9 | * of the Numerical Aerospace Simulation Facility, NASA Ames Research Center; |
| 10 | * by Edgar Fu\ss, Mathematisches Institut der Uni Bonn. |
| 11 | * |
| 12 | * Redistribution and use in source and binary forms, with or without |
| 13 | * modification, are permitted provided that the following conditions |
| 14 | * are met: |
| 15 | * 1. Redistributions of source code must retain the above copyright |
| 16 | * notice, this list of conditions and the following disclaimer. |
| 17 | * 2. Redistributions in binary form must reproduce the above copyright |
| 18 | * notice, this list of conditions and the following disclaimer in the |
| 19 | * documentation and/or other materials provided with the distribution. |
| 20 | * |
| 21 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
| 22 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
| 23 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 24 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
| 25 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 26 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 27 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 28 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 29 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 30 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 31 | * POSSIBILITY OF SUCH DAMAGE. |
| 32 | */ |
| 33 | |
| 34 | #include <sys/cdefs.h> |
| 35 | __KERNEL_RCSID(0, "$NetBSD: linux32_misc.c,v 1.25 2014/11/22 13:12:22 njoly Exp $" ); |
| 36 | |
| 37 | #include <sys/param.h> |
| 38 | #include <sys/proc.h> |
| 39 | #include <sys/time.h> |
| 40 | #include <sys/types.h> |
| 41 | #include <sys/fstypes.h> |
| 42 | #include <sys/vfs_syscalls.h> |
| 43 | #include <sys/ptrace.h> |
| 44 | #include <sys/syscall.h> |
| 45 | #include <sys/poll.h> |
| 46 | |
| 47 | #include <compat/netbsd32/netbsd32.h> |
| 48 | #include <compat/netbsd32/netbsd32_syscallargs.h> |
| 49 | |
| 50 | #include <compat/linux/common/linux_types.h> |
| 51 | |
| 52 | #include <compat/linux32/common/linux32_types.h> |
| 53 | #include <compat/linux32/common/linux32_signal.h> |
| 54 | #include <compat/linux32/common/linux32_sched.h> |
| 55 | #include <compat/linux32/linux32_syscallargs.h> |
| 56 | |
| 57 | #include <compat/linux/common/linux_ptrace.h> |
| 58 | #include <compat/linux/common/linux_emuldata.h> |
| 59 | #include <compat/linux/common/linux_signal.h> |
| 60 | #include <compat/linux/common/linux_misc.h> |
| 61 | #include <compat/linux/common/linux_statfs.h> |
| 62 | #include <compat/linux/common/linux_ipc.h> |
| 63 | #include <compat/linux/common/linux_sem.h> |
| 64 | #include <compat/linux/common/linux_futex.h> |
| 65 | #include <compat/linux/linux_syscallargs.h> |
| 66 | |
| 67 | extern const struct linux_mnttypes linux_fstypes[]; |
| 68 | extern const int linux_fstypes_cnt; |
| 69 | |
| 70 | void linux32_to_native_timespec(struct timespec *, struct linux32_timespec *); |
| 71 | |
| 72 | /* |
| 73 | * Implement the fs stat functions. Straightforward. |
| 74 | */ |
| 75 | int |
| 76 | linux32_sys_statfs(struct lwp *l, const struct linux32_sys_statfs_args *uap, register_t *retval) |
| 77 | { |
| 78 | /* { |
| 79 | syscallarg(const netbsd32_charp char) path; |
| 80 | syscallarg(linux32_statfsp) sp; |
| 81 | } */ |
| 82 | struct statvfs *sb; |
| 83 | struct linux_statfs ltmp; |
| 84 | int error; |
| 85 | |
| 86 | sb = STATVFSBUF_GET(); |
| 87 | error = do_sys_pstatvfs(l, SCARG_P32(uap, path), ST_WAIT, sb); |
| 88 | if (error == 0) { |
| 89 | bsd_to_linux_statfs(sb, <mp); |
| 90 | error = copyout(<mp, SCARG_P32(uap, sp), sizeof ltmp); |
| 91 | } |
| 92 | |
| 93 | STATVFSBUF_PUT(sb); |
| 94 | return error; |
| 95 | } |
| 96 | |
| 97 | int |
| 98 | linux32_sys_fstatfs(struct lwp *l, const struct linux32_sys_fstatfs_args *uap, register_t *retval) |
| 99 | { |
| 100 | /* { |
| 101 | syscallarg(int) fd; |
| 102 | syscallarg(linux32_statfsp) sp; |
| 103 | } */ |
| 104 | struct statvfs *sb; |
| 105 | struct linux_statfs ltmp; |
| 106 | int error; |
| 107 | |
| 108 | sb = STATVFSBUF_GET(); |
| 109 | error = do_sys_fstatvfs(l, SCARG(uap, fd), ST_WAIT, sb); |
| 110 | if (error == 0) { |
| 111 | bsd_to_linux_statfs(sb, <mp); |
| 112 | error = copyout(<mp, SCARG_P32(uap, sp), sizeof ltmp); |
| 113 | } |
| 114 | STATVFSBUF_PUT(sb); |
| 115 | |
| 116 | return error; |
| 117 | } |
| 118 | |
| 119 | int |
| 120 | linux32_sys_statfs64(struct lwp *l, const struct linux32_sys_statfs64_args *uap, register_t *retval) |
| 121 | { |
| 122 | /* { |
| 123 | syscallarg(const netbsd32_charp char) path; |
| 124 | syscallarg(linux32_statfs64p) sp; |
| 125 | } */ |
| 126 | struct statvfs *sb; |
| 127 | struct linux_statfs64 ltmp; |
| 128 | int error; |
| 129 | |
| 130 | sb = STATVFSBUF_GET(); |
| 131 | error = do_sys_pstatvfs(l, SCARG_P32(uap, path), ST_WAIT, sb); |
| 132 | if (error == 0) { |
| 133 | bsd_to_linux_statfs64(sb, <mp); |
| 134 | error = copyout(<mp, SCARG_P32(uap, sp), sizeof ltmp); |
| 135 | } |
| 136 | |
| 137 | STATVFSBUF_PUT(sb); |
| 138 | return error; |
| 139 | } |
| 140 | |
| 141 | int |
| 142 | linux32_sys_fstatfs64(struct lwp *l, const struct linux32_sys_fstatfs64_args *uap, register_t *retval) |
| 143 | { |
| 144 | /* { |
| 145 | syscallarg(int) fd; |
| 146 | syscallarg(linux32_statfs64p) sp; |
| 147 | } */ |
| 148 | struct statvfs *sb; |
| 149 | struct linux_statfs64 ltmp; |
| 150 | int error; |
| 151 | |
| 152 | sb = STATVFSBUF_GET(); |
| 153 | error = do_sys_fstatvfs(l, SCARG(uap, fd), ST_WAIT, sb); |
| 154 | if (error == 0) { |
| 155 | bsd_to_linux_statfs64(sb, <mp); |
| 156 | error = copyout(<mp, SCARG_P32(uap, sp), sizeof ltmp); |
| 157 | } |
| 158 | STATVFSBUF_PUT(sb); |
| 159 | |
| 160 | return error; |
| 161 | } |
| 162 | |
| 163 | extern const int linux_ptrace_request_map[]; |
| 164 | |
| 165 | int |
| 166 | linux32_sys_ptrace(struct lwp *l, const struct linux32_sys_ptrace_args *uap, register_t *retval) |
| 167 | { |
| 168 | /* { |
| 169 | i386, m68k, powerpc: T=int |
| 170 | alpha, amd64: T=long |
| 171 | syscallarg(T) request; |
| 172 | syscallarg(T) pid; |
| 173 | syscallarg(T) addr; |
| 174 | syscallarg(T) data; |
| 175 | } */ |
| 176 | const int *ptr; |
| 177 | int request; |
| 178 | int error; |
| 179 | |
| 180 | ptr = linux_ptrace_request_map; |
| 181 | request = SCARG(uap, request); |
| 182 | while (*ptr != -1) |
| 183 | if (*ptr++ == request) { |
| 184 | struct sys_ptrace_args pta; |
| 185 | |
| 186 | SCARG(&pta, req) = *ptr; |
| 187 | SCARG(&pta, pid) = SCARG(uap, pid); |
| 188 | SCARG(&pta, addr) = NETBSD32IPTR64(SCARG(uap, addr)); |
| 189 | SCARG(&pta, data) = SCARG(uap, data); |
| 190 | |
| 191 | /* |
| 192 | * Linux ptrace(PTRACE_CONT, pid, 0, 0) means actually |
| 193 | * to continue where the process left off previously. |
| 194 | * The same thing is achieved by addr == (void *) 1 |
| 195 | * on NetBSD, so rewrite 'addr' appropriately. |
| 196 | */ |
| 197 | if (request == LINUX_PTRACE_CONT && SCARG(uap, addr)==0) |
| 198 | SCARG(&pta, addr) = (void *) 1; |
| 199 | |
| 200 | error = sysent[SYS_ptrace].sy_call(l, &pta, retval); |
| 201 | if (error) |
| 202 | return error; |
| 203 | switch (request) { |
| 204 | case LINUX_PTRACE_PEEKTEXT: |
| 205 | case LINUX_PTRACE_PEEKDATA: |
| 206 | error = copyout (retval, |
| 207 | NETBSD32IPTR64(SCARG(uap, data)), |
| 208 | sizeof *retval); |
| 209 | *retval = SCARG(uap, data); |
| 210 | break; |
| 211 | default: |
| 212 | break; |
| 213 | } |
| 214 | return error; |
| 215 | } |
| 216 | else |
| 217 | ptr++; |
| 218 | |
| 219 | return EIO; |
| 220 | } |
| 221 | |
| 222 | int |
| 223 | linux32_sys_personality(struct lwp *l, const struct linux32_sys_personality_args *uap, register_t *retval) |
| 224 | { |
| 225 | /* { |
| 226 | syscallarg(netbsd32_u_long) per; |
| 227 | } */ |
| 228 | struct linux_sys_personality_args ua; |
| 229 | |
| 230 | NETBSD32TOX_UAP(per, long); |
| 231 | return linux_sys_personality(l, &ua, retval); |
| 232 | } |
| 233 | |
| 234 | int |
| 235 | linux32_sys_futex(struct lwp *l, |
| 236 | const struct linux32_sys_futex_args *uap, register_t *retval) |
| 237 | { |
| 238 | /* { |
| 239 | syscallarg(linux32_intp_t) uaddr; |
| 240 | syscallarg(int) op; |
| 241 | syscallarg(int) val; |
| 242 | syscallarg(linux32_timespecp_t) timeout; |
| 243 | syscallarg(linux32_intp_t) uaddr2; |
| 244 | syscallarg(int) val3; |
| 245 | } */ |
| 246 | struct linux_sys_futex_args ua; |
| 247 | struct linux32_timespec lts; |
| 248 | struct timespec ts = { 0, 0 }; |
| 249 | int error; |
| 250 | |
| 251 | NETBSD32TOP_UAP(uaddr, int); |
| 252 | NETBSD32TO64_UAP(op); |
| 253 | NETBSD32TO64_UAP(val); |
| 254 | NETBSD32TOP_UAP(timeout, struct linux_timespec); |
| 255 | NETBSD32TOP_UAP(uaddr2, int); |
| 256 | NETBSD32TO64_UAP(val3); |
| 257 | if ((SCARG(uap, op) & ~LINUX_FUTEX_PRIVATE_FLAG) == LINUX_FUTEX_WAIT && |
| 258 | SCARG_P32(uap, timeout) != NULL) { |
| 259 | if ((error = copyin((void *)SCARG_P32(uap, timeout), |
| 260 | <s, sizeof(lts))) != 0) { |
| 261 | return error; |
| 262 | } |
| 263 | linux32_to_native_timespec(&ts, <s); |
| 264 | } |
| 265 | return linux_do_futex(l, &ua, retval, &ts); |
| 266 | } |
| 267 | |
| 268 | int |
| 269 | linux32_sys_set_robust_list(struct lwp *l, |
| 270 | const struct linux32_sys_set_robust_list_args *uap, register_t *retval) |
| 271 | { |
| 272 | /* { |
| 273 | syscallarg(linux32_robust_list_headp_t) head; |
| 274 | syscallarg(linux32_size_t) len; |
| 275 | } */ |
| 276 | struct linux_sys_set_robust_list_args ua; |
| 277 | struct linux_emuldata *led; |
| 278 | |
| 279 | if (SCARG(uap, len) != 12) |
| 280 | return EINVAL; |
| 281 | |
| 282 | NETBSD32TOP_UAP(head, struct robust_list_head); |
| 283 | NETBSD32TOX64_UAP(len, size_t); |
| 284 | |
| 285 | led = l->l_emuldata; |
| 286 | led->led_robust_head = SCARG(&ua, head); |
| 287 | *retval = 0; |
| 288 | return 0; |
| 289 | } |
| 290 | |
| 291 | int |
| 292 | linux32_sys_get_robust_list(struct lwp *l, |
| 293 | const struct linux32_sys_get_robust_list_args *uap, register_t *retval) |
| 294 | { |
| 295 | /* { |
| 296 | syscallarg(linux32_robust_list_headpp_t) head; |
| 297 | syscallarg(linux32_sizep_t) len; |
| 298 | } */ |
| 299 | struct linux_sys_get_robust_list_args ua; |
| 300 | |
| 301 | NETBSD32TOP_UAP(head, struct robust_list_head *); |
| 302 | NETBSD32TOP_UAP(len, size_t *); |
| 303 | return linux_sys_get_robust_list(l, &ua, retval); |
| 304 | } |
| 305 | |
| 306 | int |
| 307 | linux32_sys_truncate64(struct lwp *l, const struct linux32_sys_truncate64_args *uap, register_t *retval) |
| 308 | { |
| 309 | /* { |
| 310 | syscallarg(netbsd32_charp) path; |
| 311 | syscallarg(off_t) length; |
| 312 | } */ |
| 313 | struct sys_truncate_args ua; |
| 314 | |
| 315 | /* Linux doesn't have the 'pad' pseudo-parameter */ |
| 316 | NETBSD32TOP_UAP(path, const char *); |
| 317 | SCARG(&ua, PAD) = 0; |
| 318 | SCARG(&ua, length) = ((off_t)SCARG(uap, lenhi) << 32) + SCARG(uap, lenlo); |
| 319 | return sys_truncate(l, &ua, retval); |
| 320 | } |
| 321 | |
| 322 | int |
| 323 | linux32_sys_ftruncate64(struct lwp *l, const struct linux32_sys_ftruncate64_args *uap, register_t *retval) |
| 324 | { |
| 325 | /* { |
| 326 | syscallarg(unsigned int) fd; |
| 327 | syscallarg(off_t) length; |
| 328 | } */ |
| 329 | struct sys_ftruncate_args ua; |
| 330 | |
| 331 | /* Linux doesn't have the 'pad' pseudo-parameter */ |
| 332 | NETBSD32TO64_UAP(fd); |
| 333 | SCARG(&ua, PAD) = 0; |
| 334 | SCARG(&ua, length) = ((off_t)SCARG(uap, lenhi) << 32) + SCARG(uap, lenlo); |
| 335 | return sys_ftruncate(l, &ua, retval); |
| 336 | } |
| 337 | |
| 338 | int |
| 339 | linux32_sys_setdomainname(struct lwp *l, const struct linux32_sys_setdomainname_args *uap, register_t *retval) |
| 340 | { |
| 341 | /* { |
| 342 | syscallarg(netbsd32_charp) domainname; |
| 343 | syscallarg(int) len; |
| 344 | } */ |
| 345 | struct linux_sys_setdomainname_args ua; |
| 346 | |
| 347 | NETBSD32TOP_UAP(domainname, char); |
| 348 | NETBSD32TO64_UAP(len); |
| 349 | return linux_sys_setdomainname(l, &ua, retval); |
| 350 | } |
| 351 | |
| 352 | int |
| 353 | linux32_sys_ppoll(struct lwp *l, const struct linux32_sys_ppoll_args *uap, |
| 354 | register_t *retval) |
| 355 | { |
| 356 | /* { |
| 357 | syscallarg(netbsd32_pollfdp_t) fds; |
| 358 | syscallarg(u_int) nfds; |
| 359 | syscallarg(linux32_timespecp_t) timeout; |
| 360 | syscallarg(linux32_sigsetp_t) sigset; |
| 361 | } */ |
| 362 | struct linux32_timespec lts0, *lts; |
| 363 | struct timespec ts0, *ts = NULL; |
| 364 | linux32_sigset_t lsigmask0, *lsigmask; |
| 365 | sigset_t sigmask0, *sigmask = NULL; |
| 366 | int error; |
| 367 | |
| 368 | lts = SCARG_P32(uap, timeout); |
| 369 | if (lts) { |
| 370 | if ((error = copyin(lts, <s0, sizeof(lts0))) != 0) |
| 371 | return error; |
| 372 | linux32_to_native_timespec(&ts0, <s0); |
| 373 | ts = &ts0; |
| 374 | } |
| 375 | |
| 376 | lsigmask = SCARG_P32(uap, sigset); |
| 377 | if (lsigmask) { |
| 378 | if ((error = copyin(lsigmask, &lsigmask0, sizeof(lsigmask0)))) |
| 379 | return error; |
| 380 | linux32_to_native_sigset(&sigmask0, &lsigmask0); |
| 381 | sigmask = &sigmask0; |
| 382 | } |
| 383 | |
| 384 | return pollcommon(retval, SCARG_P32(uap, fds), SCARG(uap, nfds), |
| 385 | ts, sigmask); |
| 386 | } |
| 387 | |