1 /* $NetBSD: linux32_misc.c,v 1.34 2021/11/25 03:08:04 ryo 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 1.34 2021/11/25 03:08:04 ryo 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 #include <sys/futex.h> 47 48 #include <compat/netbsd32/netbsd32.h> 49 #include <compat/netbsd32/netbsd32_syscallargs.h> 50 51 #include <compat/linux/common/linux_types.h> 52 53 #include <compat/linux32/common/linux32_types.h> 54 #include <compat/linux32/common/linux32_machdep.h> 55 #include <compat/linux32/common/linux32_signal.h> 56 #include <compat/linux32/common/linux32_sched.h> 57 #include <compat/linux32/linux32_syscallargs.h> 58 59 #include <compat/linux/common/linux_ptrace.h> 60 #include <compat/linux/common/linux_emuldata.h> 61 #include <compat/linux/common/linux_signal.h> 62 #include <compat/linux/common/linux_misc.h> 63 #include <compat/linux/common/linux_statfs.h> 64 #include <compat/linux/common/linux_ipc.h> 65 #include <compat/linux/common/linux_sem.h> 66 #include <compat/linux/linux_syscallargs.h> 67 68 extern const struct linux_mnttypes linux_fstypes[]; 69 extern const int linux_fstypes_cnt; 70 71 /* 72 * Implement the fs stat functions. Straightforward. 73 */ 74 int 75 linux32_sys_statfs(struct lwp *l, const struct linux32_sys_statfs_args *uap, register_t *retval) 76 { 77 /* { 78 syscallarg(const netbsd32_charp char) path; 79 syscallarg(linux32_statfsp) sp; 80 } */ 81 struct statvfs *sb; 82 struct linux_statfs ltmp; 83 int error; 84 85 sb = STATVFSBUF_GET(); 86 error = do_sys_pstatvfs(l, SCARG_P32(uap, path), ST_WAIT, sb); 87 if (error == 0) { 88 bsd_to_linux_statfs(sb, <mp); 89 error = copyout(<mp, SCARG_P32(uap, sp), sizeof ltmp); 90 } 91 92 STATVFSBUF_PUT(sb); 93 return error; 94 } 95 96 int 97 linux32_sys_fstatfs(struct lwp *l, const struct linux32_sys_fstatfs_args *uap, register_t *retval) 98 { 99 /* { 100 syscallarg(int) fd; 101 syscallarg(linux32_statfsp) sp; 102 } */ 103 struct statvfs *sb; 104 struct linux_statfs ltmp; 105 int error; 106 107 sb = STATVFSBUF_GET(); 108 error = do_sys_fstatvfs(l, SCARG(uap, fd), ST_WAIT, sb); 109 if (error == 0) { 110 bsd_to_linux_statfs(sb, <mp); 111 error = copyout(<mp, SCARG_P32(uap, sp), sizeof ltmp); 112 } 113 STATVFSBUF_PUT(sb); 114 115 return error; 116 } 117 118 int 119 linux32_sys_statfs64(struct lwp *l, const struct linux32_sys_statfs64_args *uap, register_t *retval) 120 { 121 /* { 122 syscallarg(const netbsd32_charp char) path; 123 syscallarg(linux32_statfs64p) sp; 124 } */ 125 struct statvfs *sb; 126 struct linux_statfs64 ltmp; 127 int error; 128 129 sb = STATVFSBUF_GET(); 130 error = do_sys_pstatvfs(l, SCARG_P32(uap, path), ST_WAIT, sb); 131 if (error == 0) { 132 bsd_to_linux_statfs64(sb, <mp); 133 error = copyout(<mp, SCARG_P32(uap, sp), sizeof ltmp); 134 } 135 136 STATVFSBUF_PUT(sb); 137 return error; 138 } 139 140 int 141 linux32_sys_fstatfs64(struct lwp *l, const struct linux32_sys_fstatfs64_args *uap, register_t *retval) 142 { 143 /* { 144 syscallarg(int) fd; 145 syscallarg(linux32_statfs64p) sp; 146 } */ 147 struct statvfs *sb; 148 struct linux_statfs64 ltmp; 149 int error; 150 151 sb = STATVFSBUF_GET(); 152 error = do_sys_fstatvfs(l, SCARG(uap, fd), ST_WAIT, sb); 153 if (error == 0) { 154 bsd_to_linux_statfs64(sb, <mp); 155 error = copyout(<mp, SCARG_P32(uap, sp), sizeof ltmp); 156 } 157 STATVFSBUF_PUT(sb); 158 159 return error; 160 } 161 162 extern const int linux_ptrace_request_map[]; 163 164 int 165 linux32_sys_ptrace(struct lwp *l, const struct linux32_sys_ptrace_args *uap, register_t *retval) 166 { 167 /* { 168 i386, m68k, powerpc: T=int 169 aarch64, alpha, amd64: T=long 170 syscallarg(T) request; 171 syscallarg(T) pid; 172 syscallarg(T) addr; 173 syscallarg(T) data; 174 } */ 175 const int *ptr; 176 int request; 177 int error; 178 179 ptr = linux_ptrace_request_map; 180 request = SCARG(uap, request); 181 while (*ptr != -1) 182 if (*ptr++ == request) { 183 struct sys_ptrace_args pta; 184 185 SCARG(&pta, req) = *ptr; 186 SCARG(&pta, pid) = SCARG(uap, pid); 187 SCARG(&pta, addr) = NETBSD32IPTR64(SCARG(uap, addr)); 188 SCARG(&pta, data) = SCARG(uap, data); 189 190 /* 191 * Linux ptrace(PTRACE_CONT, pid, 0, 0) means actually 192 * to continue where the process left off previously. 193 * The same thing is achieved by addr == (void *) 1 194 * on NetBSD, so rewrite 'addr' appropriately. 195 */ 196 if (request == LINUX_PTRACE_CONT && SCARG(uap, addr)==0) 197 SCARG(&pta, addr) = (void *) 1; 198 199 error = sysent[SYS_ptrace].sy_call(l, &pta, retval); 200 if (error) 201 return error; 202 switch (request) { 203 case LINUX_PTRACE_PEEKTEXT: 204 case LINUX_PTRACE_PEEKDATA: 205 error = copyout (retval, 206 NETBSD32IPTR64(SCARG(uap, data)), 207 sizeof *retval); 208 *retval = SCARG(uap, data); 209 break; 210 default: 211 break; 212 } 213 return error; 214 } 215 else 216 ptr++; 217 218 return EIO; 219 } 220 221 int 222 linux32_sys_personality(struct lwp *l, const struct linux32_sys_personality_args *uap, register_t *retval) 223 { 224 /* { 225 syscallarg(netbsd32_u_long) per; 226 } */ 227 struct linux_sys_personality_args ua; 228 229 NETBSD32TOX_UAP(per, long); 230 return linux_sys_personality(l, &ua, retval); 231 } 232 233 int 234 linux32_sys_futex(struct lwp *l, 235 const struct linux32_sys_futex_args *uap, register_t *retval) 236 { 237 /* { 238 syscallarg(linux32_intp_t) uaddr; 239 syscallarg(int) op; 240 syscallarg(int) val; 241 syscallarg(linux32_timespecp_t) timeout; 242 syscallarg(linux32_intp_t) uaddr2; 243 syscallarg(int) val3; 244 } */ 245 struct linux32_timespec lts; 246 struct timespec ts, *tsp = NULL; 247 int val2 = 0; 248 int error; 249 250 /* 251 * Linux overlays the "timeout" field and the "val2" field. 252 * "timeout" is only valid for FUTEX_WAIT and FUTEX_WAIT_BITSET 253 * on Linux. 254 */ 255 const int op = (SCARG(uap, op) & FUTEX_CMD_MASK); 256 if ((op == FUTEX_WAIT || op == FUTEX_WAIT_BITSET) && 257 SCARG_P32(uap, timeout) != NULL) { 258 if ((error = copyin(SCARG_P32(uap, timeout), 259 <s, sizeof(lts))) != 0) { 260 return error; 261 } 262 linux32_to_native_timespec(&ts, <s); 263 tsp = &ts; 264 } else { 265 val2 = (int)(uintptr_t)SCARG_P32(uap, timeout); 266 } 267 268 return linux_do_futex(SCARG_P32(uap, uaddr), SCARG(uap, op), 269 SCARG(uap, val), tsp, SCARG_P32(uap, uaddr2), val2, 270 SCARG(uap, val3), retval); 271 } 272 273 int 274 linux32_sys_truncate64(struct lwp *l, const struct linux32_sys_truncate64_args *uap, register_t *retval) 275 { 276 /* { 277 syscallarg(netbsd32_charp) path; 278 syscallarg(off_t) length; 279 } */ 280 struct sys_truncate_args ua; 281 282 /* Linux doesn't have the 'pad' pseudo-parameter */ 283 NETBSD32TOP_UAP(path, const char *); 284 SCARG(&ua, PAD) = 0; 285 SCARG(&ua, length) = ((off_t)SCARG(uap, lenhi) << 32) + SCARG(uap, lenlo); 286 return sys_truncate(l, &ua, retval); 287 } 288 289 int 290 linux32_sys_ftruncate64(struct lwp *l, const struct linux32_sys_ftruncate64_args *uap, register_t *retval) 291 { 292 /* { 293 syscallarg(unsigned int) fd; 294 syscallarg(off_t) length; 295 } */ 296 struct sys_ftruncate_args ua; 297 298 /* Linux doesn't have the 'pad' pseudo-parameter */ 299 NETBSD32TO64_UAP(fd); 300 SCARG(&ua, PAD) = 0; 301 SCARG(&ua, length) = ((off_t)SCARG(uap, lenhi) << 32) + SCARG(uap, lenlo); 302 return sys_ftruncate(l, &ua, retval); 303 } 304 305 int 306 linux32_sys_setdomainname(struct lwp *l, const struct linux32_sys_setdomainname_args *uap, register_t *retval) 307 { 308 /* { 309 syscallarg(netbsd32_charp) domainname; 310 syscallarg(int) len; 311 } */ 312 struct linux_sys_setdomainname_args ua; 313 314 NETBSD32TOP_UAP(domainname, char); 315 NETBSD32TO64_UAP(len); 316 return linux_sys_setdomainname(l, &ua, retval); 317 } 318 319 int 320 linux32_sys_ppoll(struct lwp *l, const struct linux32_sys_ppoll_args *uap, 321 register_t *retval) 322 { 323 /* { 324 syscallarg(netbsd32_pollfdp_t) fds; 325 syscallarg(u_int) nfds; 326 syscallarg(linux32_timespecp_t) timeout; 327 syscallarg(linux32_sigsetp_t) sigset; 328 } */ 329 struct linux32_timespec lts0, *lts; 330 struct timespec ts0, *ts = NULL; 331 linux32_sigset_t lsigmask0, *lsigmask; 332 sigset_t sigmask0, *sigmask = NULL; 333 int error; 334 335 lts = SCARG_P32(uap, timeout); 336 if (lts) { 337 if ((error = copyin(lts, <s0, sizeof(lts0))) != 0) 338 return error; 339 linux32_to_native_timespec(&ts0, <s0); 340 ts = &ts0; 341 } 342 343 lsigmask = SCARG_P32(uap, sigset); 344 if (lsigmask) { 345 if ((error = copyin(lsigmask, &lsigmask0, sizeof(lsigmask0)))) 346 return error; 347 linux32_to_native_sigset(&sigmask0, &lsigmask0); 348 sigmask = &sigmask0; 349 } 350 351 return pollcommon(retval, SCARG_P32(uap, fds), SCARG(uap, nfds), 352 ts, sigmask); 353 } 354 355 int 356 linux32_sys_eventfd(struct lwp *l, const struct linux32_sys_eventfd_args *uap, 357 register_t *retval) 358 { 359 /* { 360 syscallarg(unsigned int) initval; 361 } */ 362 struct linux_sys_eventfd_args ua; 363 364 NETBSD32TO64_UAP(initval); 365 366 return linux_sys_eventfd(l, &ua, retval); 367 } 368 369 int 370 linux32_sys_eventfd2(struct lwp *l, const struct linux32_sys_eventfd2_args *uap, 371 register_t *retval) 372 { 373 /* { 374 syscallarg(unsigned int) initval; 375 syscallarg(int) flags; 376 } */ 377 struct linux_sys_eventfd2_args ua; 378 379 NETBSD32TO64_UAP(initval); 380 NETBSD32TO64_UAP(flags); 381 382 return linux_sys_eventfd2(l, &ua, retval); 383 } 384 385 static inline off_t 386 linux32_hilo_to_off_t(unsigned long hi, unsigned long lo) 387 { 388 return (((off_t)hi) << 32) | lo; 389 } 390 391 int 392 linux32_sys_preadv(struct lwp *l, const struct linux32_sys_preadv_args *uap, 393 register_t *retval) 394 { 395 /* { 396 syscallarg(int) fd; 397 syscallarg(const netbsd32_iovecp_t) iovp; 398 syscallarg(int) iovcnt; 399 syscallarg(netbsd32_u_long) off_lo; 400 syscallarg(netbsd32_u_long) off_hi; 401 } */ 402 struct netbsd32_preadv_args ua; 403 404 SCARG(&ua, fd) = SCARG(uap, fd); 405 SCARG(&ua, iovp) = SCARG(uap, iovp); 406 SCARG(&ua, iovcnt) = SCARG(uap, iovcnt); 407 SCARG(&ua, PAD) = 0; 408 SCARG(&ua, offset) = linux32_hilo_to_off_t(SCARG(uap, off_hi), 409 SCARG(uap, off_lo)); 410 return netbsd32_preadv(l, &ua, retval); 411 } 412 413 int 414 linux32_sys_pwritev(struct lwp *l, const struct linux32_sys_pwritev_args *uap, 415 register_t *retval) 416 { 417 /* { 418 syscallarg(int) fd; 419 syscallarg(const netbsd32_iovecp_t) iovp; 420 syscallarg(int) iovcnt; 421 syscallarg(netbsd32_u_long) off_lo; 422 syscallarg(netbsd32_u_long) off_hi; 423 } */ 424 struct netbsd32_pwritev_args ua; 425 426 SCARG(&ua, fd) = SCARG(uap, fd); 427 SCARG(&ua, iovp) = SCARG(uap, iovp); 428 SCARG(&ua, iovcnt) = SCARG(uap, iovcnt); 429 SCARG(&ua, PAD) = 0; 430 SCARG(&ua, offset) = linux32_hilo_to_off_t(SCARG(uap, off_hi), 431 SCARG(uap, off_lo)); 432 return netbsd32_pwritev(l, &ua, retval); 433 } 434
Indexes created Wed Sep 24 02:09:48 GMT 2025