| 1 | /* $NetBSD: linux_misc.c,v 1.233 2016/11/10 17:00:51 christos Exp $ */ |
| 2 | |
| 3 | /*- |
| 4 | * Copyright (c) 1995, 1998, 1999, 2008 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 | * |
| 11 | * Redistribution and use in source and binary forms, with or without |
| 12 | * modification, are permitted provided that the following conditions |
| 13 | * are met: |
| 14 | * 1. Redistributions of source code must retain the above copyright |
| 15 | * notice, this list of conditions and the following disclaimer. |
| 16 | * 2. Redistributions in binary form must reproduce the above copyright |
| 17 | * notice, this list of conditions and the following disclaimer in the |
| 18 | * documentation and/or other materials provided with the distribution. |
| 19 | * |
| 20 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
| 21 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
| 22 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 23 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
| 24 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 25 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 26 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 27 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 28 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 29 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 30 | * POSSIBILITY OF SUCH DAMAGE. |
| 31 | */ |
| 32 | |
| 33 | /* |
| 34 | * Linux compatibility module. Try to deal with various Linux system calls. |
| 35 | */ |
| 36 | |
| 37 | /* |
| 38 | * These functions have been moved to multiarch to allow |
| 39 | * selection of which machines include them to be |
| 40 | * determined by the individual files.linux_<arch> files. |
| 41 | * |
| 42 | * Function in multiarch: |
| 43 | * linux_sys_break : linux_break.c |
| 44 | * linux_sys_alarm : linux_misc_notalpha.c |
| 45 | * linux_sys_getresgid : linux_misc_notalpha.c |
| 46 | * linux_sys_nice : linux_misc_notalpha.c |
| 47 | * linux_sys_readdir : linux_misc_notalpha.c |
| 48 | * linux_sys_setresgid : linux_misc_notalpha.c |
| 49 | * linux_sys_time : linux_misc_notalpha.c |
| 50 | * linux_sys_utime : linux_misc_notalpha.c |
| 51 | * linux_sys_waitpid : linux_misc_notalpha.c |
| 52 | * linux_sys_old_mmap : linux_oldmmap.c |
| 53 | * linux_sys_oldolduname : linux_oldolduname.c |
| 54 | * linux_sys_oldselect : linux_oldselect.c |
| 55 | * linux_sys_olduname : linux_olduname.c |
| 56 | * linux_sys_pipe : linux_pipe.c |
| 57 | */ |
| 58 | |
| 59 | #include <sys/cdefs.h> |
| 60 | __KERNEL_RCSID(0, "$NetBSD: linux_misc.c,v 1.233 2016/11/10 17:00:51 christos Exp $" ); |
| 61 | |
| 62 | #include <sys/param.h> |
| 63 | #include <sys/systm.h> |
| 64 | #include <sys/namei.h> |
| 65 | #include <sys/proc.h> |
| 66 | #include <sys/dirent.h> |
| 67 | #include <sys/file.h> |
| 68 | #include <sys/stat.h> |
| 69 | #include <sys/filedesc.h> |
| 70 | #include <sys/ioctl.h> |
| 71 | #include <sys/kernel.h> |
| 72 | #include <sys/malloc.h> |
| 73 | #include <sys/mbuf.h> |
| 74 | #include <sys/mman.h> |
| 75 | #include <sys/mount.h> |
| 76 | #include <sys/poll.h> |
| 77 | #include <sys/prot.h> |
| 78 | #include <sys/reboot.h> |
| 79 | #include <sys/resource.h> |
| 80 | #include <sys/resourcevar.h> |
| 81 | #include <sys/select.h> |
| 82 | #include <sys/signal.h> |
| 83 | #include <sys/signalvar.h> |
| 84 | #include <sys/socket.h> |
| 85 | #include <sys/time.h> |
| 86 | #include <sys/times.h> |
| 87 | #include <sys/vnode.h> |
| 88 | #include <sys/uio.h> |
| 89 | #include <sys/wait.h> |
| 90 | #include <sys/utsname.h> |
| 91 | #include <sys/unistd.h> |
| 92 | #include <sys/vfs_syscalls.h> |
| 93 | #include <sys/swap.h> /* for SWAP_ON */ |
| 94 | #include <sys/sysctl.h> /* for KERN_DOMAINNAME */ |
| 95 | #include <sys/kauth.h> |
| 96 | |
| 97 | #include <sys/ptrace.h> |
| 98 | #include <machine/ptrace.h> |
| 99 | |
| 100 | #include <sys/syscall.h> |
| 101 | #include <sys/syscallargs.h> |
| 102 | |
| 103 | #include <compat/sys/resource.h> |
| 104 | |
| 105 | #include <compat/linux/common/linux_machdep.h> |
| 106 | #include <compat/linux/common/linux_types.h> |
| 107 | #include <compat/linux/common/linux_signal.h> |
| 108 | #include <compat/linux/common/linux_ipc.h> |
| 109 | #include <compat/linux/common/linux_sem.h> |
| 110 | |
| 111 | #include <compat/linux/common/linux_fcntl.h> |
| 112 | #include <compat/linux/common/linux_mmap.h> |
| 113 | #include <compat/linux/common/linux_dirent.h> |
| 114 | #include <compat/linux/common/linux_util.h> |
| 115 | #include <compat/linux/common/linux_misc.h> |
| 116 | #include <compat/linux/common/linux_statfs.h> |
| 117 | #include <compat/linux/common/linux_limit.h> |
| 118 | #include <compat/linux/common/linux_ptrace.h> |
| 119 | #include <compat/linux/common/linux_reboot.h> |
| 120 | #include <compat/linux/common/linux_emuldata.h> |
| 121 | #include <compat/linux/common/linux_sched.h> |
| 122 | |
| 123 | #include <compat/linux/linux_syscallargs.h> |
| 124 | |
| 125 | const int linux_ptrace_request_map[] = { |
| 126 | LINUX_PTRACE_TRACEME, PT_TRACE_ME, |
| 127 | LINUX_PTRACE_PEEKTEXT, PT_READ_I, |
| 128 | LINUX_PTRACE_PEEKDATA, PT_READ_D, |
| 129 | LINUX_PTRACE_POKETEXT, PT_WRITE_I, |
| 130 | LINUX_PTRACE_POKEDATA, PT_WRITE_D, |
| 131 | LINUX_PTRACE_CONT, PT_CONTINUE, |
| 132 | LINUX_PTRACE_KILL, PT_KILL, |
| 133 | LINUX_PTRACE_ATTACH, PT_ATTACH, |
| 134 | LINUX_PTRACE_DETACH, PT_DETACH, |
| 135 | # ifdef PT_STEP |
| 136 | LINUX_PTRACE_SINGLESTEP, PT_STEP, |
| 137 | # endif |
| 138 | LINUX_PTRACE_SYSCALL, PT_SYSCALL, |
| 139 | -1 |
| 140 | }; |
| 141 | |
| 142 | const struct linux_mnttypes linux_fstypes[] = { |
| 143 | { MOUNT_FFS, LINUX_DEFAULT_SUPER_MAGIC }, |
| 144 | { MOUNT_NFS, LINUX_NFS_SUPER_MAGIC }, |
| 145 | { MOUNT_MFS, LINUX_DEFAULT_SUPER_MAGIC }, |
| 146 | { MOUNT_MSDOS, LINUX_MSDOS_SUPER_MAGIC }, |
| 147 | { MOUNT_LFS, LINUX_DEFAULT_SUPER_MAGIC }, |
| 148 | { MOUNT_FDESC, LINUX_DEFAULT_SUPER_MAGIC }, |
| 149 | { MOUNT_NULL, LINUX_DEFAULT_SUPER_MAGIC }, |
| 150 | { MOUNT_OVERLAY, LINUX_DEFAULT_SUPER_MAGIC }, |
| 151 | { MOUNT_UMAP, LINUX_DEFAULT_SUPER_MAGIC }, |
| 152 | { MOUNT_KERNFS, LINUX_DEFAULT_SUPER_MAGIC }, |
| 153 | { MOUNT_PROCFS, LINUX_PROC_SUPER_MAGIC }, |
| 154 | { MOUNT_AFS, LINUX_DEFAULT_SUPER_MAGIC }, |
| 155 | { MOUNT_CD9660, LINUX_ISOFS_SUPER_MAGIC }, |
| 156 | { MOUNT_UNION, LINUX_DEFAULT_SUPER_MAGIC }, |
| 157 | { MOUNT_ADOSFS, LINUX_ADFS_SUPER_MAGIC }, |
| 158 | { MOUNT_EXT2FS, LINUX_EXT2_SUPER_MAGIC }, |
| 159 | { MOUNT_CFS, LINUX_DEFAULT_SUPER_MAGIC }, |
| 160 | { MOUNT_CODA, LINUX_CODA_SUPER_MAGIC }, |
| 161 | { MOUNT_FILECORE, LINUX_DEFAULT_SUPER_MAGIC }, |
| 162 | { MOUNT_NTFS, LINUX_DEFAULT_SUPER_MAGIC }, |
| 163 | { MOUNT_SMBFS, LINUX_SMB_SUPER_MAGIC }, |
| 164 | { MOUNT_PTYFS, LINUX_DEVPTS_SUPER_MAGIC }, |
| 165 | { MOUNT_TMPFS, LINUX_TMPFS_SUPER_MAGIC } |
| 166 | }; |
| 167 | const int linux_fstypes_cnt = sizeof(linux_fstypes) / sizeof(linux_fstypes[0]); |
| 168 | |
| 169 | # ifdef DEBUG_LINUX |
| 170 | #define DPRINTF(a) uprintf a |
| 171 | # else |
| 172 | #define DPRINTF(a) |
| 173 | # endif |
| 174 | |
| 175 | /* Local linux_misc.c functions: */ |
| 176 | static void linux_to_bsd_mmap_args(struct sys_mmap_args *, |
| 177 | const struct linux_sys_mmap_args *); |
| 178 | static int linux_mmap(struct lwp *, const struct linux_sys_mmap_args *, |
| 179 | register_t *, off_t); |
| 180 | |
| 181 | |
| 182 | /* |
| 183 | * The information on a terminated (or stopped) process needs |
| 184 | * to be converted in order for Linux binaries to get a valid signal |
| 185 | * number out of it. |
| 186 | */ |
| 187 | int |
| 188 | bsd_to_linux_wstat(int st) |
| 189 | { |
| 190 | |
| 191 | int sig; |
| 192 | |
| 193 | if (WIFSIGNALED(st)) { |
| 194 | sig = WTERMSIG(st); |
| 195 | if (sig >= 0 && sig < NSIG) |
| 196 | st= (st & ~0177) | native_to_linux_signo[sig]; |
| 197 | } else if (WIFSTOPPED(st)) { |
| 198 | sig = WSTOPSIG(st); |
| 199 | if (sig >= 0 && sig < NSIG) |
| 200 | st = (st & ~0xff00) | |
| 201 | (native_to_linux_signo[sig] << 8); |
| 202 | } |
| 203 | return st; |
| 204 | } |
| 205 | |
| 206 | /* |
| 207 | * wait4(2). Passed on to the NetBSD call, surrounded by code to |
| 208 | * reserve some space for a NetBSD-style wait status, and converting |
| 209 | * it to what Linux wants. |
| 210 | */ |
| 211 | int |
| 212 | linux_sys_wait4(struct lwp *l, const struct linux_sys_wait4_args *uap, register_t *retval) |
| 213 | { |
| 214 | /* { |
| 215 | syscallarg(int) pid; |
| 216 | syscallarg(int *) status; |
| 217 | syscallarg(int) options; |
| 218 | syscallarg(struct rusage50 *) rusage; |
| 219 | } */ |
| 220 | int error, status, options, linux_options, pid = SCARG(uap, pid); |
| 221 | struct rusage50 ru50; |
| 222 | struct rusage ru; |
| 223 | proc_t *p; |
| 224 | |
| 225 | linux_options = SCARG(uap, options); |
| 226 | if (linux_options & ~(LINUX_WAIT4_KNOWNFLAGS)) |
| 227 | return (EINVAL); |
| 228 | |
| 229 | options = 0; |
| 230 | if (linux_options & LINUX_WAIT4_WNOHANG) |
| 231 | options |= WNOHANG; |
| 232 | if (linux_options & LINUX_WAIT4_WUNTRACED) |
| 233 | options |= WUNTRACED; |
| 234 | if (linux_options & LINUX_WAIT4_WCONTINUED) |
| 235 | options |= WCONTINUED; |
| 236 | if (linux_options & LINUX_WAIT4_WALL) |
| 237 | options |= WALLSIG; |
| 238 | if (linux_options & LINUX_WAIT4_WCLONE) |
| 239 | options |= WALTSIG; |
| 240 | # ifdef DIAGNOSTIC |
| 241 | if (linux_options & LINUX_WAIT4_WNOTHREAD) |
| 242 | printf("WARNING: %s: linux process %d.%d called " |
| 243 | "waitpid with __WNOTHREAD set!" , |
| 244 | __FILE__, l->l_proc->p_pid, l->l_lid); |
| 245 | |
| 246 | # endif |
| 247 | |
| 248 | error = do_sys_wait(&pid, &status, options, |
| 249 | SCARG(uap, rusage) != NULL ? &ru : NULL); |
| 250 | |
| 251 | retval[0] = pid; |
| 252 | if (pid == 0) |
| 253 | return error; |
| 254 | |
| 255 | p = curproc; |
| 256 | mutex_enter(p->p_lock); |
| 257 | sigdelset(&p->p_sigpend.sp_set, SIGCHLD); /* XXXAD ksiginfo leak */ |
| 258 | mutex_exit(p->p_lock); |
| 259 | |
| 260 | if (SCARG(uap, rusage) != NULL) { |
| 261 | rusage_to_rusage50(&ru, &ru50); |
| 262 | error = copyout(&ru, SCARG(uap, rusage), sizeof(ru)); |
| 263 | } |
| 264 | |
| 265 | if (error == 0 && SCARG(uap, status) != NULL) { |
| 266 | status = bsd_to_linux_wstat(status); |
| 267 | error = copyout(&status, SCARG(uap, status), sizeof status); |
| 268 | } |
| 269 | |
| 270 | return error; |
| 271 | } |
| 272 | |
| 273 | /* |
| 274 | * Linux brk(2). Like native, but always return the new break value. |
| 275 | */ |
| 276 | int |
| 277 | linux_sys_brk(struct lwp *l, const struct linux_sys_brk_args *uap, register_t *retval) |
| 278 | { |
| 279 | /* { |
| 280 | syscallarg(char *) nsize; |
| 281 | } */ |
| 282 | struct proc *p = l->l_proc; |
| 283 | struct vmspace *vm = p->p_vmspace; |
| 284 | struct sys_obreak_args oba; |
| 285 | |
| 286 | SCARG(&oba, nsize) = SCARG(uap, nsize); |
| 287 | |
| 288 | (void) sys_obreak(l, &oba, retval); |
| 289 | retval[0] = (register_t)((char *)vm->vm_daddr + ptoa(vm->vm_dsize)); |
| 290 | return 0; |
| 291 | } |
| 292 | |
| 293 | /* |
| 294 | * Implement the fs stat functions. Straightforward. |
| 295 | */ |
| 296 | int |
| 297 | linux_sys_statfs(struct lwp *l, const struct linux_sys_statfs_args *uap, register_t *retval) |
| 298 | { |
| 299 | /* { |
| 300 | syscallarg(const char *) path; |
| 301 | syscallarg(struct linux_statfs *) sp; |
| 302 | } */ |
| 303 | struct statvfs *sb; |
| 304 | struct linux_statfs ltmp; |
| 305 | int error; |
| 306 | |
| 307 | sb = STATVFSBUF_GET(); |
| 308 | error = do_sys_pstatvfs(l, SCARG(uap, path), ST_WAIT, sb); |
| 309 | if (error == 0) { |
| 310 | bsd_to_linux_statfs(sb, <mp); |
| 311 | error = copyout(<mp, SCARG(uap, sp), sizeof ltmp); |
| 312 | } |
| 313 | STATVFSBUF_PUT(sb); |
| 314 | |
| 315 | return error; |
| 316 | } |
| 317 | |
| 318 | int |
| 319 | linux_sys_fstatfs(struct lwp *l, const struct linux_sys_fstatfs_args *uap, register_t *retval) |
| 320 | { |
| 321 | /* { |
| 322 | syscallarg(int) fd; |
| 323 | syscallarg(struct linux_statfs *) sp; |
| 324 | } */ |
| 325 | struct statvfs *sb; |
| 326 | struct linux_statfs ltmp; |
| 327 | int error; |
| 328 | |
| 329 | sb = STATVFSBUF_GET(); |
| 330 | error = do_sys_fstatvfs(l, SCARG(uap, fd), ST_WAIT, sb); |
| 331 | if (error == 0) { |
| 332 | bsd_to_linux_statfs(sb, <mp); |
| 333 | error = copyout(<mp, SCARG(uap, sp), sizeof ltmp); |
| 334 | } |
| 335 | STATVFSBUF_PUT(sb); |
| 336 | |
| 337 | return error; |
| 338 | } |
| 339 | |
| 340 | /* |
| 341 | * uname(). Just copy the info from the various strings stored in the |
| 342 | * kernel, and put it in the Linux utsname structure. That structure |
| 343 | * is almost the same as the NetBSD one, only it has fields 65 characters |
| 344 | * long, and an extra domainname field. |
| 345 | */ |
| 346 | int |
| 347 | linux_sys_uname(struct lwp *l, const struct linux_sys_uname_args *uap, register_t *retval) |
| 348 | { |
| 349 | /* { |
| 350 | syscallarg(struct linux_utsname *) up; |
| 351 | } */ |
| 352 | struct linux_utsname luts; |
| 353 | |
| 354 | strlcpy(luts.l_sysname, linux_sysname, sizeof(luts.l_sysname)); |
| 355 | strlcpy(luts.l_nodename, hostname, sizeof(luts.l_nodename)); |
| 356 | strlcpy(luts.l_release, linux_release, sizeof(luts.l_release)); |
| 357 | strlcpy(luts.l_version, linux_version, sizeof(luts.l_version)); |
| 358 | strlcpy(luts.l_machine, LINUX_UNAME_ARCH, sizeof(luts.l_machine)); |
| 359 | strlcpy(luts.l_domainname, domainname, sizeof(luts.l_domainname)); |
| 360 | |
| 361 | return copyout(&luts, SCARG(uap, up), sizeof(luts)); |
| 362 | } |
| 363 | |
| 364 | /* Used directly on: alpha, mips, ppc, sparc, sparc64 */ |
| 365 | /* Used indirectly on: arm, i386, m68k */ |
| 366 | |
| 367 | /* |
| 368 | * New type Linux mmap call. |
| 369 | * Only called directly on machines with >= 6 free regs. |
| 370 | */ |
| 371 | int |
| 372 | linux_sys_mmap(struct lwp *l, const struct linux_sys_mmap_args *uap, register_t *retval) |
| 373 | { |
| 374 | /* { |
| 375 | syscallarg(unsigned long) addr; |
| 376 | syscallarg(size_t) len; |
| 377 | syscallarg(int) prot; |
| 378 | syscallarg(int) flags; |
| 379 | syscallarg(int) fd; |
| 380 | syscallarg(linux_off_t) offset; |
| 381 | } */ |
| 382 | |
| 383 | if (SCARG(uap, offset) & PAGE_MASK) |
| 384 | return EINVAL; |
| 385 | |
| 386 | return linux_mmap(l, uap, retval, SCARG(uap, offset)); |
| 387 | } |
| 388 | |
| 389 | /* |
| 390 | * Guts of most architectures' mmap64() implementations. This shares |
| 391 | * its list of arguments with linux_sys_mmap(). |
| 392 | * |
| 393 | * The difference in linux_sys_mmap2() is that "offset" is actually |
| 394 | * (offset / pagesize), not an absolute byte count. This translation |
| 395 | * to pagesize offsets is done inside glibc between the mmap64() call |
| 396 | * point, and the actual syscall. |
| 397 | */ |
| 398 | int |
| 399 | linux_sys_mmap2(struct lwp *l, const struct linux_sys_mmap2_args *uap, register_t *retval) |
| 400 | { |
| 401 | /* { |
| 402 | syscallarg(unsigned long) addr; |
| 403 | syscallarg(size_t) len; |
| 404 | syscallarg(int) prot; |
| 405 | syscallarg(int) flags; |
| 406 | syscallarg(int) fd; |
| 407 | syscallarg(linux_off_t) offset; |
| 408 | } */ |
| 409 | |
| 410 | return linux_mmap(l, uap, retval, |
| 411 | ((off_t)SCARG(uap, offset)) << PAGE_SHIFT); |
| 412 | } |
| 413 | |
| 414 | /* |
| 415 | * Massage arguments and call system mmap(2). |
| 416 | */ |
| 417 | static int |
| 418 | linux_mmap(struct lwp *l, const struct linux_sys_mmap_args *uap, register_t *retval, off_t offset) |
| 419 | { |
| 420 | struct sys_mmap_args cma; |
| 421 | int error; |
| 422 | size_t mmoff=0; |
| 423 | |
| 424 | linux_to_bsd_mmap_args(&cma, uap); |
| 425 | SCARG(&cma, pos) = offset; |
| 426 | |
| 427 | if (SCARG(uap, flags) & LINUX_MAP_GROWSDOWN) { |
| 428 | /* |
| 429 | * Request for stack-like memory segment. On linux, this |
| 430 | * works by mmap()ping (small) segment, which is automatically |
| 431 | * extended when page fault happens below the currently |
| 432 | * allocated area. We emulate this by allocating (typically |
| 433 | * bigger) segment sized at current stack size limit, and |
| 434 | * offsetting the requested and returned address accordingly. |
| 435 | * Since physical pages are only allocated on-demand, this |
| 436 | * is effectively identical. |
| 437 | */ |
| 438 | rlim_t ssl = l->l_proc->p_rlimit[RLIMIT_STACK].rlim_cur; |
| 439 | |
| 440 | if (SCARG(&cma, len) < ssl) { |
| 441 | /* Compute the address offset */ |
| 442 | mmoff = round_page(ssl) - SCARG(uap, len); |
| 443 | |
| 444 | if (SCARG(&cma, addr)) |
| 445 | SCARG(&cma, addr) = (char *)SCARG(&cma, addr) - mmoff; |
| 446 | |
| 447 | SCARG(&cma, len) = (size_t) ssl; |
| 448 | } |
| 449 | } |
| 450 | |
| 451 | error = sys_mmap(l, &cma, retval); |
| 452 | if (error) |
| 453 | return (error); |
| 454 | |
| 455 | /* Shift the returned address for stack-like segment if necessary */ |
| 456 | retval[0] += mmoff; |
| 457 | |
| 458 | return (0); |
| 459 | } |
| 460 | |
| 461 | static void |
| 462 | linux_to_bsd_mmap_args(struct sys_mmap_args *cma, const struct linux_sys_mmap_args *uap) |
| 463 | { |
| 464 | int flags = MAP_TRYFIXED, fl = SCARG(uap, flags); |
| 465 | |
| 466 | flags |= cvtto_bsd_mask(fl, LINUX_MAP_SHARED, MAP_SHARED); |
| 467 | flags |= cvtto_bsd_mask(fl, LINUX_MAP_PRIVATE, MAP_PRIVATE); |
| 468 | flags |= cvtto_bsd_mask(fl, LINUX_MAP_FIXED, MAP_FIXED); |
| 469 | flags |= cvtto_bsd_mask(fl, LINUX_MAP_ANON, MAP_ANON); |
| 470 | flags |= cvtto_bsd_mask(fl, LINUX_MAP_LOCKED, MAP_WIRED); |
| 471 | /* XXX XAX ERH: Any other flags here? There are more defined... */ |
| 472 | |
| 473 | SCARG(cma, addr) = (void *)SCARG(uap, addr); |
| 474 | SCARG(cma, len) = SCARG(uap, len); |
| 475 | SCARG(cma, prot) = SCARG(uap, prot); |
| 476 | if (SCARG(cma, prot) & VM_PROT_WRITE) /* XXX */ |
| 477 | SCARG(cma, prot) |= VM_PROT_READ; |
| 478 | SCARG(cma, flags) = flags; |
| 479 | SCARG(cma, fd) = flags & MAP_ANON ? -1 : SCARG(uap, fd); |
| 480 | SCARG(cma, PAD) = 0; |
| 481 | } |
| 482 | |
| 483 | #define LINUX_MREMAP_MAYMOVE 1 |
| 484 | #define LINUX_MREMAP_FIXED 2 |
| 485 | |
| 486 | int |
| 487 | linux_sys_mremap(struct lwp *l, const struct linux_sys_mremap_args *uap, register_t *retval) |
| 488 | { |
| 489 | /* { |
| 490 | syscallarg(void *) old_address; |
| 491 | syscallarg(size_t) old_size; |
| 492 | syscallarg(size_t) new_size; |
| 493 | syscallarg(u_long) flags; |
| 494 | } */ |
| 495 | |
| 496 | struct proc *p; |
| 497 | struct vm_map *map; |
| 498 | vaddr_t oldva; |
| 499 | vaddr_t newva; |
| 500 | size_t oldsize; |
| 501 | size_t newsize; |
| 502 | int flags; |
| 503 | int uvmflags; |
| 504 | int error; |
| 505 | |
| 506 | flags = SCARG(uap, flags); |
| 507 | oldva = (vaddr_t)SCARG(uap, old_address); |
| 508 | oldsize = round_page(SCARG(uap, old_size)); |
| 509 | newsize = round_page(SCARG(uap, new_size)); |
| 510 | if ((flags & ~(LINUX_MREMAP_FIXED|LINUX_MREMAP_MAYMOVE)) != 0) { |
| 511 | error = EINVAL; |
| 512 | goto done; |
| 513 | } |
| 514 | if ((flags & LINUX_MREMAP_FIXED) != 0) { |
| 515 | if ((flags & LINUX_MREMAP_MAYMOVE) == 0) { |
| 516 | error = EINVAL; |
| 517 | goto done; |
| 518 | } |
| 519 | #if 0 /* notyet */ |
| 520 | newva = SCARG(uap, new_address); |
| 521 | uvmflags = MAP_FIXED; |
| 522 | #else /* notyet */ |
| 523 | error = EOPNOTSUPP; |
| 524 | goto done; |
| 525 | #endif /* notyet */ |
| 526 | } else if ((flags & LINUX_MREMAP_MAYMOVE) != 0) { |
| 527 | uvmflags = 0; |
| 528 | } else { |
| 529 | newva = oldva; |
| 530 | uvmflags = MAP_FIXED; |
| 531 | } |
| 532 | p = l->l_proc; |
| 533 | map = &p->p_vmspace->vm_map; |
| 534 | error = uvm_mremap(map, oldva, oldsize, map, &newva, newsize, p, |
| 535 | uvmflags); |
| 536 | |
| 537 | done: |
| 538 | *retval = (error != 0) ? 0 : (register_t)newva; |
| 539 | return error; |
| 540 | } |
| 541 | |
| 542 | #ifdef USRSTACK |
| 543 | int |
| 544 | linux_sys_mprotect(struct lwp *l, const struct linux_sys_mprotect_args *uap, register_t *retval) |
| 545 | { |
| 546 | /* { |
| 547 | syscallarg(const void *) start; |
| 548 | syscallarg(unsigned long) len; |
| 549 | syscallarg(int) prot; |
| 550 | } */ |
| 551 | struct vm_map_entry *entry; |
| 552 | struct vm_map *map; |
| 553 | struct proc *p; |
| 554 | vaddr_t end, start, len, stacklim; |
| 555 | int prot, grows; |
| 556 | |
| 557 | start = (vaddr_t)SCARG(uap, start); |
| 558 | len = round_page(SCARG(uap, len)); |
| 559 | prot = SCARG(uap, prot); |
| 560 | grows = prot & (LINUX_PROT_GROWSDOWN | LINUX_PROT_GROWSUP); |
| 561 | prot &= ~grows; |
| 562 | end = start + len; |
| 563 | |
| 564 | if (start & PAGE_MASK) |
| 565 | return EINVAL; |
| 566 | if (end < start) |
| 567 | return EINVAL; |
| 568 | if (end == start) |
| 569 | return 0; |
| 570 | |
| 571 | if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC)) |
| 572 | return EINVAL; |
| 573 | if (grows == (LINUX_PROT_GROWSDOWN | LINUX_PROT_GROWSUP)) |
| 574 | return EINVAL; |
| 575 | |
| 576 | p = l->l_proc; |
| 577 | map = &p->p_vmspace->vm_map; |
| 578 | vm_map_lock(map); |
| 579 | # ifdef notdef |
| 580 | VM_MAP_RANGE_CHECK(map, start, end); |
| 581 | # endif |
| 582 | if (!uvm_map_lookup_entry(map, start, &entry) || entry->start > start) { |
| 583 | vm_map_unlock(map); |
| 584 | return ENOMEM; |
| 585 | } |
| 586 | |
| 587 | /* |
| 588 | * Approximate the behaviour of PROT_GROWS{DOWN,UP}. |
| 589 | */ |
| 590 | |
| 591 | stacklim = (vaddr_t)p->p_limit->pl_rlimit[RLIMIT_STACK].rlim_cur; |
| 592 | if (grows & LINUX_PROT_GROWSDOWN) { |
| 593 | if (USRSTACK - stacklim <= start && start < USRSTACK) { |
| 594 | start = USRSTACK - stacklim; |
| 595 | } else { |
| 596 | start = entry->start; |
| 597 | } |
| 598 | } else if (grows & LINUX_PROT_GROWSUP) { |
| 599 | if (USRSTACK <= end && end < USRSTACK + stacklim) { |
| 600 | end = USRSTACK + stacklim; |
| 601 | } else { |
| 602 | end = entry->end; |
| 603 | } |
| 604 | } |
| 605 | vm_map_unlock(map); |
| 606 | return uvm_map_protect(map, start, end, prot, FALSE); |
| 607 | } |
| 608 | #endif /* USRSTACK */ |
| 609 | |
| 610 | /* |
| 611 | * This code is partly stolen from src/lib/libc/compat-43/times.c |
| 612 | */ |
| 613 | |
| 614 | #define CONVTCK(r) (r.tv_sec * hz + r.tv_usec / (1000000 / hz)) |
| 615 | |
| 616 | int |
| 617 | linux_sys_times(struct lwp *l, const struct linux_sys_times_args *uap, register_t *retval) |
| 618 | { |
| 619 | /* { |
| 620 | syscallarg(struct times *) tms; |
| 621 | } */ |
| 622 | struct proc *p = l->l_proc; |
| 623 | struct timeval t; |
| 624 | int error; |
| 625 | |
| 626 | if (SCARG(uap, tms)) { |
| 627 | struct linux_tms ltms; |
| 628 | struct rusage ru; |
| 629 | |
| 630 | mutex_enter(p->p_lock); |
| 631 | calcru(p, &ru.ru_utime, &ru.ru_stime, NULL, NULL); |
| 632 | ltms.ltms_utime = CONVTCK(ru.ru_utime); |
| 633 | ltms.ltms_stime = CONVTCK(ru.ru_stime); |
| 634 | ltms.ltms_cutime = CONVTCK(p->p_stats->p_cru.ru_utime); |
| 635 | ltms.ltms_cstime = CONVTCK(p->p_stats->p_cru.ru_stime); |
| 636 | mutex_exit(p->p_lock); |
| 637 | |
| 638 | if ((error = copyout(<ms, SCARG(uap, tms), sizeof ltms))) |
| 639 | return error; |
| 640 | } |
| 641 | |
| 642 | getmicrouptime(&t); |
| 643 | |
| 644 | retval[0] = ((linux_clock_t)(CONVTCK(t))); |
| 645 | return 0; |
| 646 | } |
| 647 | |
| 648 | #undef CONVTCK |
| 649 | |
| 650 | /* |
| 651 | * Linux 'readdir' call. This code is mostly taken from the |
| 652 | * SunOS getdents call (see compat/sunos/sunos_misc.c), though |
| 653 | * an attempt has been made to keep it a little cleaner (failing |
| 654 | * miserably, because of the cruft needed if count 1 is passed). |
| 655 | * |
| 656 | * The d_off field should contain the offset of the next valid entry, |
| 657 | * but in Linux it has the offset of the entry itself. We emulate |
| 658 | * that bug here. |
| 659 | * |
| 660 | * Read in BSD-style entries, convert them, and copy them out. |
| 661 | * |
| 662 | * Note that this doesn't handle union-mounted filesystems. |
| 663 | */ |
| 664 | int |
| 665 | linux_sys_getdents(struct lwp *l, const struct linux_sys_getdents_args *uap, register_t *retval) |
| 666 | { |
| 667 | /* { |
| 668 | syscallarg(int) fd; |
| 669 | syscallarg(struct linux_dirent *) dent; |
| 670 | syscallarg(unsigned int) count; |
| 671 | } */ |
| 672 | struct dirent *bdp; |
| 673 | struct vnode *vp; |
| 674 | char *inp, *tbuf; /* BSD-format */ |
| 675 | int len, reclen; /* BSD-format */ |
| 676 | char *outp; /* Linux-format */ |
| 677 | int resid, linux_reclen = 0; /* Linux-format */ |
| 678 | struct file *fp; |
| 679 | struct uio auio; |
| 680 | struct iovec aiov; |
| 681 | struct linux_dirent idb; |
| 682 | off_t off; /* true file offset */ |
| 683 | int buflen, error, eofflag, nbytes, oldcall; |
| 684 | struct vattr va; |
| 685 | off_t *cookiebuf = NULL, *cookie; |
| 686 | int ncookies; |
| 687 | |
| 688 | /* fd_getvnode() will use the descriptor for us */ |
| 689 | if ((error = fd_getvnode(SCARG(uap, fd), &fp)) != 0) |
| 690 | return (error); |
| 691 | |
| 692 | if ((fp->f_flag & FREAD) == 0) { |
| 693 | error = EBADF; |
| 694 | goto out1; |
| 695 | } |
| 696 | |
| 697 | vp = (struct vnode *)fp->f_data; |
| 698 | if (vp->v_type != VDIR) { |
| 699 | error = ENOTDIR; |
| 700 | goto out1; |
| 701 | } |
| 702 | |
| 703 | vn_lock(vp, LK_SHARED | LK_RETRY); |
| 704 | error = VOP_GETATTR(vp, &va, l->l_cred); |
| 705 | VOP_UNLOCK(vp); |
| 706 | if (error) |
| 707 | goto out1; |
| 708 | |
| 709 | nbytes = SCARG(uap, count); |
| 710 | if (nbytes == 1) { /* emulating old, broken behaviour */ |
| 711 | nbytes = sizeof (idb); |
| 712 | buflen = max(va.va_blocksize, nbytes); |
| 713 | oldcall = 1; |
| 714 | } else { |
| 715 | buflen = min(MAXBSIZE, nbytes); |
| 716 | if (buflen < va.va_blocksize) |
| 717 | buflen = va.va_blocksize; |
| 718 | oldcall = 0; |
| 719 | } |
| 720 | tbuf = malloc(buflen, M_TEMP, M_WAITOK); |
| 721 | |
| 722 | vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); |
| 723 | off = fp->f_offset; |
| 724 | again: |
| 725 | aiov.iov_base = tbuf; |
| 726 | aiov.iov_len = buflen; |
| 727 | auio.uio_iov = &aiov; |
| 728 | auio.uio_iovcnt = 1; |
| 729 | auio.uio_rw = UIO_READ; |
| 730 | auio.uio_resid = buflen; |
| 731 | auio.uio_offset = off; |
| 732 | UIO_SETUP_SYSSPACE(&auio); |
| 733 | /* |
| 734 | * First we read into the malloc'ed buffer, then |
| 735 | * we massage it into user space, one record at a time. |
| 736 | */ |
| 737 | error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag, &cookiebuf, |
| 738 | &ncookies); |
| 739 | if (error) |
| 740 | goto out; |
| 741 | |
| 742 | inp = tbuf; |
| 743 | outp = (void *)SCARG(uap, dent); |
| 744 | resid = nbytes; |
| 745 | if ((len = buflen - auio.uio_resid) == 0) |
| 746 | goto eof; |
| 747 | |
| 748 | for (cookie = cookiebuf; len > 0; len -= reclen) { |
| 749 | bdp = (struct dirent *)inp; |
| 750 | reclen = bdp->d_reclen; |
| 751 | if (reclen & 3) |
| 752 | panic("linux_readdir" ); |
| 753 | if (bdp->d_fileno == 0) { |
| 754 | inp += reclen; /* it is a hole; squish it out */ |
| 755 | if (cookie) |
| 756 | off = *cookie++; |
| 757 | else |
| 758 | off += reclen; |
| 759 | continue; |
| 760 | } |
| 761 | linux_reclen = LINUX_RECLEN(&idb, bdp->d_namlen); |
| 762 | if (reclen > len || resid < linux_reclen) { |
| 763 | /* entry too big for buffer, so just stop */ |
| 764 | outp++; |
| 765 | break; |
| 766 | } |
| 767 | /* |
| 768 | * Massage in place to make a Linux-shaped dirent (otherwise |
| 769 | * we have to worry about touching user memory outside of |
| 770 | * the copyout() call). |
| 771 | */ |
| 772 | idb.d_ino = bdp->d_fileno; |
| 773 | /* |
| 774 | * The old readdir() call misuses the offset and reclen fields. |
| 775 | */ |
| 776 | if (oldcall) { |
| 777 | idb.d_off = (linux_off_t)linux_reclen; |
| 778 | idb.d_reclen = (u_short)bdp->d_namlen; |
| 779 | } else { |
| 780 | if (sizeof (idb.d_off) <= 4 && (off >> 32) != 0) { |
| 781 | compat_offseterr(vp, "linux_getdents" ); |
| 782 | error = EINVAL; |
| 783 | goto out; |
| 784 | } |
| 785 | idb.d_off = (linux_off_t)off; |
| 786 | idb.d_reclen = (u_short)linux_reclen; |
| 787 | /* Linux puts d_type at the end of each record */ |
| 788 | *((char *)&idb + idb.d_reclen - 1) = bdp->d_type; |
| 789 | } |
| 790 | strcpy(idb.d_name, bdp->d_name); |
| 791 | if ((error = copyout((void *)&idb, outp, linux_reclen))) |
| 792 | goto out; |
| 793 | /* advance past this real entry */ |
| 794 | inp += reclen; |
| 795 | if (cookie) |
| 796 | off = *cookie++; /* each entry points to itself */ |
| 797 | else |
| 798 | off += reclen; |
| 799 | /* advance output past Linux-shaped entry */ |
| 800 | outp += linux_reclen; |
| 801 | resid -= linux_reclen; |
| 802 | if (oldcall) |
| 803 | break; |
| 804 | } |
| 805 | |
| 806 | /* if we squished out the whole block, try again */ |
| 807 | if (outp == (void *)SCARG(uap, dent)) { |
| 808 | if (cookiebuf) |
| 809 | free(cookiebuf, M_TEMP); |
| 810 | cookiebuf = NULL; |
| 811 | goto again; |
| 812 | } |
| 813 | fp->f_offset = off; /* update the vnode offset */ |
| 814 | |
| 815 | if (oldcall) |
| 816 | nbytes = resid + linux_reclen; |
| 817 | |
| 818 | eof: |
| 819 | *retval = nbytes - resid; |
| 820 | out: |
| 821 | VOP_UNLOCK(vp); |
| 822 | if (cookiebuf) |
| 823 | free(cookiebuf, M_TEMP); |
| 824 | free(tbuf, M_TEMP); |
| 825 | out1: |
| 826 | fd_putfile(SCARG(uap, fd)); |
| 827 | return error; |
| 828 | } |
| 829 | |
| 830 | /* |
| 831 | * Even when just using registers to pass arguments to syscalls you can |
| 832 | * have 5 of them on the i386. So this newer version of select() does |
| 833 | * this. |
| 834 | */ |
| 835 | int |
| 836 | linux_sys_select(struct lwp *l, const struct linux_sys_select_args *uap, register_t *retval) |
| 837 | { |
| 838 | /* { |
| 839 | syscallarg(int) nfds; |
| 840 | syscallarg(fd_set *) readfds; |
| 841 | syscallarg(fd_set *) writefds; |
| 842 | syscallarg(fd_set *) exceptfds; |
| 843 | syscallarg(struct timeval50 *) timeout; |
| 844 | } */ |
| 845 | |
| 846 | return linux_select1(l, retval, SCARG(uap, nfds), SCARG(uap, readfds), |
| 847 | SCARG(uap, writefds), SCARG(uap, exceptfds), |
| 848 | (struct linux_timeval *)SCARG(uap, timeout)); |
| 849 | } |
| 850 | |
| 851 | /* |
| 852 | * Common code for the old and new versions of select(). A couple of |
| 853 | * things are important: |
| 854 | * 1) return the amount of time left in the 'timeout' parameter |
| 855 | * 2) select never returns ERESTART on Linux, always return EINTR |
| 856 | */ |
| 857 | int |
| 858 | linux_select1(struct lwp *l, register_t *retval, int nfds, fd_set *readfds, |
| 859 | fd_set *writefds, fd_set *exceptfds, struct linux_timeval *timeout) |
| 860 | { |
| 861 | struct timespec ts0, ts1, uts, *ts = NULL; |
| 862 | struct linux_timeval ltv; |
| 863 | int error; |
| 864 | |
| 865 | /* |
| 866 | * Store current time for computation of the amount of |
| 867 | * time left. |
| 868 | */ |
| 869 | if (timeout) { |
| 870 | if ((error = copyin(timeout, <v, sizeof(ltv)))) |
| 871 | return error; |
| 872 | uts.tv_sec = ltv.tv_sec; |
| 873 | uts.tv_nsec = ltv.tv_usec * 1000; |
| 874 | if (itimespecfix(&uts)) { |
| 875 | /* |
| 876 | * The timeval was invalid. Convert it to something |
| 877 | * valid that will act as it does under Linux. |
| 878 | */ |
| 879 | uts.tv_sec += uts.tv_nsec / 1000000000; |
| 880 | uts.tv_nsec %= 1000000000; |
| 881 | if (uts.tv_nsec < 0) { |
| 882 | uts.tv_sec -= 1; |
| 883 | uts.tv_nsec += 1000000000; |
| 884 | } |
| 885 | if (uts.tv_sec < 0) |
| 886 | timespecclear(&uts); |
| 887 | } |
| 888 | ts = &uts; |
| 889 | nanotime(&ts0); |
| 890 | } |
| 891 | |
| 892 | error = selcommon(retval, nfds, readfds, writefds, exceptfds, ts, NULL); |
| 893 | |
| 894 | if (error) { |
| 895 | /* |
| 896 | * See fs/select.c in the Linux kernel. Without this, |
| 897 | * Maelstrom doesn't work. |
| 898 | */ |
| 899 | if (error == ERESTART) |
| 900 | error = EINTR; |
| 901 | return error; |
| 902 | } |
| 903 | |
| 904 | if (timeout) { |
| 905 | if (*retval) { |
| 906 | /* |
| 907 | * Compute how much time was left of the timeout, |
| 908 | * by subtracting the current time and the time |
| 909 | * before we started the call, and subtracting |
| 910 | * that result from the user-supplied value. |
| 911 | */ |
| 912 | nanotime(&ts1); |
| 913 | timespecsub(&ts1, &ts0, &ts1); |
| 914 | timespecsub(&uts, &ts1, &uts); |
| 915 | if (uts.tv_sec < 0) |
| 916 | timespecclear(&uts); |
| 917 | } else |
| 918 | timespecclear(&uts); |
| 919 | ltv.tv_sec = uts.tv_sec; |
| 920 | ltv.tv_usec = uts.tv_nsec / 1000; |
| 921 | if ((error = copyout(<v, timeout, sizeof(ltv)))) |
| 922 | return error; |
| 923 | } |
| 924 | |
| 925 | return 0; |
| 926 | } |
| 927 | |
| 928 | int |
| 929 | linux_sys_ppoll(struct lwp *l, |
| 930 | const struct linux_sys_ppoll_args *uap, register_t *retval) |
| 931 | { |
| 932 | /* { |
| 933 | syscallarg(struct pollfd *) fds; |
| 934 | syscallarg(u_int) nfds; |
| 935 | syscallarg(struct linux_timespec *) timeout; |
| 936 | syscallarg(linux_sigset_t *) sigset; |
| 937 | } */ |
| 938 | struct linux_timespec lts0, *lts; |
| 939 | struct timespec ts0, *ts = NULL; |
| 940 | linux_sigset_t lsigmask0, *lsigmask; |
| 941 | sigset_t sigmask0, *sigmask = NULL; |
| 942 | int error; |
| 943 | |
| 944 | lts = SCARG(uap, timeout); |
| 945 | if (lts) { |
| 946 | if ((error = copyin(lts, <s0, sizeof(lts0))) != 0) |
| 947 | return error; |
| 948 | linux_to_native_timespec(&ts0, <s0); |
| 949 | ts = &ts0; |
| 950 | } |
| 951 | |
| 952 | lsigmask = SCARG(uap, sigset); |
| 953 | if (lsigmask) { |
| 954 | if ((error = copyin(lsigmask, &lsigmask0, sizeof(lsigmask0)))) |
| 955 | return error; |
| 956 | linux_to_native_sigset(&sigmask0, &lsigmask0); |
| 957 | sigmask = &sigmask0; |
| 958 | } |
| 959 | |
| 960 | return pollcommon(retval, SCARG(uap, fds), SCARG(uap, nfds), |
| 961 | ts, sigmask); |
| 962 | } |
| 963 | |
| 964 | /* |
| 965 | * Set the 'personality' (emulation mode) for the current process. Only |
| 966 | * accept the Linux personality here (0). This call is needed because |
| 967 | * the Linux ELF crt0 issues it in an ugly kludge to make sure that |
| 968 | * ELF binaries run in Linux mode, not SVR4 mode. |
| 969 | */ |
| 970 | int |
| 971 | linux_sys_personality(struct lwp *l, const struct linux_sys_personality_args *uap, register_t *retval) |
| 972 | { |
| 973 | /* { |
| 974 | syscallarg(unsigned long) per; |
| 975 | } */ |
| 976 | struct linux_emuldata *led; |
| 977 | int per; |
| 978 | |
| 979 | per = SCARG(uap, per); |
| 980 | led = l->l_emuldata; |
| 981 | if (per == LINUX_PER_QUERY) { |
| 982 | retval[0] = led->led_personality; |
| 983 | return 0; |
| 984 | } |
| 985 | |
| 986 | switch (per & LINUX_PER_MASK) { |
| 987 | case LINUX_PER_LINUX: |
| 988 | case LINUX_PER_LINUX32: |
| 989 | led->led_personality = per; |
| 990 | break; |
| 991 | |
| 992 | default: |
| 993 | return EINVAL; |
| 994 | } |
| 995 | |
| 996 | retval[0] = per; |
| 997 | return 0; |
| 998 | } |
| 999 | |
| 1000 | /* |
| 1001 | * We have nonexistent fsuid equal to uid. |
| 1002 | * If modification is requested, refuse. |
| 1003 | */ |
| 1004 | int |
| 1005 | linux_sys_setfsuid(struct lwp *l, const struct linux_sys_setfsuid_args *uap, register_t *retval) |
| 1006 | { |
| 1007 | /* { |
| 1008 | syscallarg(uid_t) uid; |
| 1009 | } */ |
| 1010 | uid_t uid; |
| 1011 | |
| 1012 | uid = SCARG(uap, uid); |
| 1013 | if (kauth_cred_getuid(l->l_cred) != uid) |
| 1014 | return sys_nosys(l, uap, retval); |
| 1015 | |
| 1016 | *retval = uid; |
| 1017 | return 0; |
| 1018 | } |
| 1019 | |
| 1020 | int |
| 1021 | linux_sys_setfsgid(struct lwp *l, const struct linux_sys_setfsgid_args *uap, register_t *retval) |
| 1022 | { |
| 1023 | /* { |
| 1024 | syscallarg(gid_t) gid; |
| 1025 | } */ |
| 1026 | gid_t gid; |
| 1027 | |
| 1028 | gid = SCARG(uap, gid); |
| 1029 | if (kauth_cred_getgid(l->l_cred) != gid) |
| 1030 | return sys_nosys(l, uap, retval); |
| 1031 | |
| 1032 | *retval = gid; |
| 1033 | return 0; |
| 1034 | } |
| 1035 | |
| 1036 | int |
| 1037 | linux_sys_setresuid(struct lwp *l, const struct linux_sys_setresuid_args *uap, register_t *retval) |
| 1038 | { |
| 1039 | /* { |
| 1040 | syscallarg(uid_t) ruid; |
| 1041 | syscallarg(uid_t) euid; |
| 1042 | syscallarg(uid_t) suid; |
| 1043 | } */ |
| 1044 | |
| 1045 | /* |
| 1046 | * Note: These checks are a little different than the NetBSD |
| 1047 | * setreuid(2) call performs. This precisely follows the |
| 1048 | * behavior of the Linux kernel. |
| 1049 | */ |
| 1050 | |
| 1051 | return do_setresuid(l, SCARG(uap, ruid), SCARG(uap, euid), |
| 1052 | SCARG(uap, suid), |
| 1053 | ID_R_EQ_R | ID_R_EQ_E | ID_R_EQ_S | |
| 1054 | ID_E_EQ_R | ID_E_EQ_E | ID_E_EQ_S | |
| 1055 | ID_S_EQ_R | ID_S_EQ_E | ID_S_EQ_S ); |
| 1056 | } |
| 1057 | |
| 1058 | int |
| 1059 | linux_sys_getresuid(struct lwp *l, const struct linux_sys_getresuid_args *uap, register_t *retval) |
| 1060 | { |
| 1061 | /* { |
| 1062 | syscallarg(uid_t *) ruid; |
| 1063 | syscallarg(uid_t *) euid; |
| 1064 | syscallarg(uid_t *) suid; |
| 1065 | } */ |
| 1066 | kauth_cred_t pc = l->l_cred; |
| 1067 | int error; |
| 1068 | uid_t uid; |
| 1069 | |
| 1070 | /* |
| 1071 | * Linux copies these values out to userspace like so: |
| 1072 | * |
| 1073 | * 1. Copy out ruid. |
| 1074 | * 2. If that succeeds, copy out euid. |
| 1075 | * 3. If both of those succeed, copy out suid. |
| 1076 | */ |
| 1077 | uid = kauth_cred_getuid(pc); |
| 1078 | if ((error = copyout(&uid, SCARG(uap, ruid), sizeof(uid_t))) != 0) |
| 1079 | return (error); |
| 1080 | |
| 1081 | uid = kauth_cred_geteuid(pc); |
| 1082 | if ((error = copyout(&uid, SCARG(uap, euid), sizeof(uid_t))) != 0) |
| 1083 | return (error); |
| 1084 | |
| 1085 | uid = kauth_cred_getsvuid(pc); |
| 1086 | |
| 1087 | return (copyout(&uid, SCARG(uap, suid), sizeof(uid_t))); |
| 1088 | } |
| 1089 | |
| 1090 | int |
| 1091 | linux_sys_ptrace(struct lwp *l, const struct linux_sys_ptrace_args *uap, register_t *retval) |
| 1092 | { |
| 1093 | /* { |
| 1094 | i386, m68k, powerpc: T=int |
| 1095 | alpha, amd64: T=long |
| 1096 | syscallarg(T) request; |
| 1097 | syscallarg(T) pid; |
| 1098 | syscallarg(T) addr; |
| 1099 | syscallarg(T) data; |
| 1100 | } */ |
| 1101 | const int *ptr; |
| 1102 | int request; |
| 1103 | int error; |
| 1104 | |
| 1105 | ptr = linux_ptrace_request_map; |
| 1106 | request = SCARG(uap, request); |
| 1107 | while (*ptr != -1) |
| 1108 | if (*ptr++ == request) { |
| 1109 | struct sys_ptrace_args pta; |
| 1110 | |
| 1111 | SCARG(&pta, req) = *ptr; |
| 1112 | SCARG(&pta, pid) = SCARG(uap, pid); |
| 1113 | SCARG(&pta, addr) = (void *)SCARG(uap, addr); |
| 1114 | SCARG(&pta, data) = SCARG(uap, data); |
| 1115 | |
| 1116 | /* |
| 1117 | * Linux ptrace(PTRACE_CONT, pid, 0, 0) means actually |
| 1118 | * to continue where the process left off previously. |
| 1119 | * The same thing is achieved by addr == (void *) 1 |
| 1120 | * on NetBSD, so rewrite 'addr' appropriately. |
| 1121 | */ |
| 1122 | if (request == LINUX_PTRACE_CONT && SCARG(uap, addr)==0) |
| 1123 | SCARG(&pta, addr) = (void *) 1; |
| 1124 | |
| 1125 | error = sysent[SYS_ptrace].sy_call(l, &pta, retval); |
| 1126 | if (error) |
| 1127 | return error; |
| 1128 | switch (request) { |
| 1129 | case LINUX_PTRACE_PEEKTEXT: |
| 1130 | case LINUX_PTRACE_PEEKDATA: |
| 1131 | error = copyout (retval, |
| 1132 | (void *)SCARG(uap, data), |
| 1133 | sizeof *retval); |
| 1134 | *retval = SCARG(uap, data); |
| 1135 | break; |
| 1136 | default: |
| 1137 | break; |
| 1138 | } |
| 1139 | return error; |
| 1140 | } |
| 1141 | else |
| 1142 | ptr++; |
| 1143 | |
| 1144 | return LINUX_SYS_PTRACE_ARCH(l, uap, retval); |
| 1145 | } |
| 1146 | |
| 1147 | int |
| 1148 | linux_sys_reboot(struct lwp *l, const struct linux_sys_reboot_args *uap, register_t *retval) |
| 1149 | { |
| 1150 | /* { |
| 1151 | syscallarg(int) magic1; |
| 1152 | syscallarg(int) magic2; |
| 1153 | syscallarg(int) cmd; |
| 1154 | syscallarg(void *) arg; |
| 1155 | } */ |
| 1156 | struct sys_reboot_args /* { |
| 1157 | syscallarg(int) opt; |
| 1158 | syscallarg(char *) bootstr; |
| 1159 | } */ sra; |
| 1160 | int error; |
| 1161 | |
| 1162 | if ((error = kauth_authorize_system(l->l_cred, |
| 1163 | KAUTH_SYSTEM_REBOOT, 0, NULL, NULL, NULL)) != 0) |
| 1164 | return(error); |
| 1165 | |
| 1166 | if (SCARG(uap, magic1) != LINUX_REBOOT_MAGIC1) |
| 1167 | return(EINVAL); |
| 1168 | if (SCARG(uap, magic2) != LINUX_REBOOT_MAGIC2 && |
| 1169 | SCARG(uap, magic2) != LINUX_REBOOT_MAGIC2A && |
| 1170 | SCARG(uap, magic2) != LINUX_REBOOT_MAGIC2B) |
| 1171 | return(EINVAL); |
| 1172 | |
| 1173 | switch ((unsigned long)SCARG(uap, cmd)) { |
| 1174 | case LINUX_REBOOT_CMD_RESTART: |
| 1175 | SCARG(&sra, opt) = RB_AUTOBOOT; |
| 1176 | break; |
| 1177 | case LINUX_REBOOT_CMD_HALT: |
| 1178 | SCARG(&sra, opt) = RB_HALT; |
| 1179 | break; |
| 1180 | case LINUX_REBOOT_CMD_POWER_OFF: |
| 1181 | SCARG(&sra, opt) = RB_HALT|RB_POWERDOWN; |
| 1182 | break; |
| 1183 | case LINUX_REBOOT_CMD_RESTART2: |
| 1184 | /* Reboot with an argument. */ |
| 1185 | SCARG(&sra, opt) = RB_AUTOBOOT|RB_STRING; |
| 1186 | SCARG(&sra, bootstr) = SCARG(uap, arg); |
| 1187 | break; |
| 1188 | case LINUX_REBOOT_CMD_CAD_ON: |
| 1189 | return(EINVAL); /* We don't implement ctrl-alt-delete */ |
| 1190 | case LINUX_REBOOT_CMD_CAD_OFF: |
| 1191 | return(0); |
| 1192 | default: |
| 1193 | return(EINVAL); |
| 1194 | } |
| 1195 | |
| 1196 | return(sys_reboot(l, &sra, retval)); |
| 1197 | } |
| 1198 | |
| 1199 | /* |
| 1200 | * Copy of compat_12_sys_swapon(). |
| 1201 | */ |
| 1202 | int |
| 1203 | linux_sys_swapon(struct lwp *l, const struct linux_sys_swapon_args *uap, register_t *retval) |
| 1204 | { |
| 1205 | /* { |
| 1206 | syscallarg(const char *) name; |
| 1207 | } */ |
| 1208 | struct sys_swapctl_args ua; |
| 1209 | |
| 1210 | SCARG(&ua, cmd) = SWAP_ON; |
| 1211 | SCARG(&ua, arg) = (void *)__UNCONST(SCARG(uap, name)); |
| 1212 | SCARG(&ua, misc) = 0; /* priority */ |
| 1213 | return (sys_swapctl(l, &ua, retval)); |
| 1214 | } |
| 1215 | |
| 1216 | /* |
| 1217 | * Stop swapping to the file or block device specified by path. |
| 1218 | */ |
| 1219 | int |
| 1220 | linux_sys_swapoff(struct lwp *l, const struct linux_sys_swapoff_args *uap, register_t *retval) |
| 1221 | { |
| 1222 | /* { |
| 1223 | syscallarg(const char *) path; |
| 1224 | } */ |
| 1225 | struct sys_swapctl_args ua; |
| 1226 | |
| 1227 | SCARG(&ua, cmd) = SWAP_OFF; |
| 1228 | SCARG(&ua, arg) = __UNCONST(SCARG(uap, path)); /*XXXUNCONST*/ |
| 1229 | return (sys_swapctl(l, &ua, retval)); |
| 1230 | } |
| 1231 | |
| 1232 | /* |
| 1233 | * Copy of compat_09_sys_setdomainname() |
| 1234 | */ |
| 1235 | /* ARGSUSED */ |
| 1236 | int |
| 1237 | linux_sys_setdomainname(struct lwp *l, const struct linux_sys_setdomainname_args *uap, register_t *retval) |
| 1238 | { |
| 1239 | /* { |
| 1240 | syscallarg(char *) domainname; |
| 1241 | syscallarg(int) len; |
| 1242 | } */ |
| 1243 | int name[2]; |
| 1244 | |
| 1245 | name[0] = CTL_KERN; |
| 1246 | name[1] = KERN_DOMAINNAME; |
| 1247 | return (old_sysctl(&name[0], 2, 0, 0, SCARG(uap, domainname), |
| 1248 | SCARG(uap, len), l)); |
| 1249 | } |
| 1250 | |
| 1251 | /* |
| 1252 | * sysinfo() |
| 1253 | */ |
| 1254 | /* ARGSUSED */ |
| 1255 | int |
| 1256 | linux_sys_sysinfo(struct lwp *l, const struct linux_sys_sysinfo_args *uap, register_t *retval) |
| 1257 | { |
| 1258 | /* { |
| 1259 | syscallarg(struct linux_sysinfo *) arg; |
| 1260 | } */ |
| 1261 | struct linux_sysinfo si; |
| 1262 | struct loadavg *la; |
| 1263 | |
| 1264 | si.uptime = time_uptime; |
| 1265 | la = &averunnable; |
| 1266 | si.loads[0] = la->ldavg[0] * LINUX_SYSINFO_LOADS_SCALE / la->fscale; |
| 1267 | si.loads[1] = la->ldavg[1] * LINUX_SYSINFO_LOADS_SCALE / la->fscale; |
| 1268 | si.loads[2] = la->ldavg[2] * LINUX_SYSINFO_LOADS_SCALE / la->fscale; |
| 1269 | si.totalram = ctob((u_long)physmem); |
| 1270 | si.freeram = (u_long)uvmexp.free * uvmexp.pagesize; |
| 1271 | si.sharedram = 0; /* XXX */ |
| 1272 | si.bufferram = (u_long)uvmexp.filepages * uvmexp.pagesize; |
| 1273 | si.totalswap = (u_long)uvmexp.swpages * uvmexp.pagesize; |
| 1274 | si.freeswap = |
| 1275 | (u_long)(uvmexp.swpages - uvmexp.swpginuse) * uvmexp.pagesize; |
| 1276 | si.procs = nprocs; |
| 1277 | |
| 1278 | /* The following are only present in newer Linux kernels. */ |
| 1279 | si.totalbig = 0; |
| 1280 | si.freebig = 0; |
| 1281 | si.mem_unit = 1; |
| 1282 | |
| 1283 | return (copyout(&si, SCARG(uap, arg), sizeof si)); |
| 1284 | } |
| 1285 | |
| 1286 | int |
| 1287 | linux_sys_getrlimit(struct lwp *l, const struct linux_sys_getrlimit_args *uap, register_t *retval) |
| 1288 | { |
| 1289 | /* { |
| 1290 | syscallarg(int) which; |
| 1291 | # ifdef LINUX_LARGEFILE64 |
| 1292 | syscallarg(struct rlimit *) rlp; |
| 1293 | # else |
| 1294 | syscallarg(struct orlimit *) rlp; |
| 1295 | # endif |
| 1296 | } */ |
| 1297 | # ifdef LINUX_LARGEFILE64 |
| 1298 | struct rlimit orl; |
| 1299 | # else |
| 1300 | struct orlimit orl; |
| 1301 | # endif |
| 1302 | int which; |
| 1303 | |
| 1304 | which = linux_to_bsd_limit(SCARG(uap, which)); |
| 1305 | if (which < 0) |
| 1306 | return -which; |
| 1307 | |
| 1308 | bsd_to_linux_rlimit(&orl, &l->l_proc->p_rlimit[which]); |
| 1309 | |
| 1310 | return copyout(&orl, SCARG(uap, rlp), sizeof(orl)); |
| 1311 | } |
| 1312 | |
| 1313 | int |
| 1314 | linux_sys_setrlimit(struct lwp *l, const struct linux_sys_setrlimit_args *uap, register_t *retval) |
| 1315 | { |
| 1316 | /* { |
| 1317 | syscallarg(int) which; |
| 1318 | # ifdef LINUX_LARGEFILE64 |
| 1319 | syscallarg(struct rlimit *) rlp; |
| 1320 | # else |
| 1321 | syscallarg(struct orlimit *) rlp; |
| 1322 | # endif |
| 1323 | } */ |
| 1324 | struct rlimit rl; |
| 1325 | # ifdef LINUX_LARGEFILE64 |
| 1326 | struct rlimit orl; |
| 1327 | # else |
| 1328 | struct orlimit orl; |
| 1329 | # endif |
| 1330 | int error; |
| 1331 | int which; |
| 1332 | |
| 1333 | if ((error = copyin(SCARG(uap, rlp), &orl, sizeof(orl))) != 0) |
| 1334 | return error; |
| 1335 | |
| 1336 | which = linux_to_bsd_limit(SCARG(uap, which)); |
| 1337 | if (which < 0) |
| 1338 | return -which; |
| 1339 | |
| 1340 | linux_to_bsd_rlimit(&rl, &orl); |
| 1341 | return dosetrlimit(l, l->l_proc, which, &rl); |
| 1342 | } |
| 1343 | |
| 1344 | # if !defined(__mips__) && !defined(__amd64__) |
| 1345 | /* XXX: this doesn't look 100% common, at least mips doesn't have it */ |
| 1346 | int |
| 1347 | linux_sys_ugetrlimit(struct lwp *l, const struct linux_sys_ugetrlimit_args *uap, register_t *retval) |
| 1348 | { |
| 1349 | return linux_sys_getrlimit(l, (const void *)uap, retval); |
| 1350 | } |
| 1351 | # endif |
| 1352 | |
| 1353 | /* |
| 1354 | * This gets called for unsupported syscalls. The difference to sys_nosys() |
| 1355 | * is that process does not get SIGSYS, the call just returns with ENOSYS. |
| 1356 | * This is the way Linux does it and glibc depends on this behaviour. |
| 1357 | */ |
| 1358 | int |
| 1359 | linux_sys_nosys(struct lwp *l, const void *v, register_t *retval) |
| 1360 | { |
| 1361 | return (ENOSYS); |
| 1362 | } |
| 1363 | |
| 1364 | int |
| 1365 | linux_sys_getpriority(struct lwp *l, const struct linux_sys_getpriority_args *uap, register_t *retval) |
| 1366 | { |
| 1367 | /* { |
| 1368 | syscallarg(int) which; |
| 1369 | syscallarg(int) who; |
| 1370 | } */ |
| 1371 | struct sys_getpriority_args bsa; |
| 1372 | int error; |
| 1373 | |
| 1374 | SCARG(&bsa, which) = SCARG(uap, which); |
| 1375 | SCARG(&bsa, who) = SCARG(uap, who); |
| 1376 | |
| 1377 | if ((error = sys_getpriority(l, &bsa, retval))) |
| 1378 | return error; |
| 1379 | |
| 1380 | *retval = NZERO - *retval; |
| 1381 | |
| 1382 | return 0; |
| 1383 | } |
| 1384 | |
| 1385 | int |
| 1386 | linux_do_sys_utimensat(struct lwp *l, int fd, const char *path, struct timespec *tsp, int flags, register_t *retval) |
| 1387 | { |
| 1388 | int follow, error; |
| 1389 | |
| 1390 | follow = (flags & LINUX_AT_SYMLINK_NOFOLLOW) ? NOFOLLOW : FOLLOW; |
| 1391 | |
| 1392 | if (path == NULL && fd != AT_FDCWD) { |
| 1393 | file_t *fp; |
| 1394 | |
| 1395 | /* fd_getvnode() will use the descriptor for us */ |
| 1396 | if ((error = fd_getvnode(fd, &fp)) != 0) |
| 1397 | return error; |
| 1398 | error = do_sys_utimensat(l, AT_FDCWD, fp->f_data, NULL, 0, |
| 1399 | tsp, UIO_SYSSPACE); |
| 1400 | fd_putfile(fd); |
| 1401 | return error; |
| 1402 | } |
| 1403 | |
| 1404 | return do_sys_utimensat(l, fd, NULL, path, follow, tsp, UIO_SYSSPACE); |
| 1405 | } |
| 1406 | |
| 1407 | int |
| 1408 | linux_sys_utimensat(struct lwp *l, const struct linux_sys_utimensat_args *uap, |
| 1409 | register_t *retval) |
| 1410 | { |
| 1411 | /* { |
| 1412 | syscallarg(int) fd; |
| 1413 | syscallarg(const char *) path; |
| 1414 | syscallarg(const struct linux_timespec *) times; |
| 1415 | syscallarg(int) flag; |
| 1416 | } */ |
| 1417 | int error; |
| 1418 | struct linux_timespec lts[2]; |
| 1419 | struct timespec *tsp = NULL, ts[2]; |
| 1420 | |
| 1421 | if (SCARG(uap, times)) { |
| 1422 | error = copyin(SCARG(uap, times), <s, sizeof(lts)); |
| 1423 | if (error != 0) |
| 1424 | return error; |
| 1425 | linux_to_native_timespec(&ts[0], <s[0]); |
| 1426 | linux_to_native_timespec(&ts[1], <s[1]); |
| 1427 | tsp = ts; |
| 1428 | } |
| 1429 | |
| 1430 | return linux_do_sys_utimensat(l, SCARG(uap, fd), SCARG(uap, path), |
| 1431 | tsp, SCARG(uap, flag), retval); |
| 1432 | } |
| 1433 | |