| 1 | /*- |
| 2 | * Copyright (c) 1989 The Regents of the University of California. |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * 1. Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer in the |
| 12 | * documentation and/or other materials provided with the distribution. |
| 13 | * 3. All advertising materials mentioning features or use of this software |
| 14 | * must display the following acknowledgement: |
| 15 | * This product includes software developed by the University of |
| 16 | * California, Berkeley and its contributors. |
| 17 | * 4. Neither the name of the University nor the names of its contributors |
| 18 | * may be used to endorse or promote products derived from this software |
| 19 | * without specific prior written permission. |
| 20 | * |
| 21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 31 | * SUCH DAMAGE. |
| 32 | * |
| 33 | */ |
| 34 | |
| 35 | #if defined(LIBC_SCCS) && !defined(lint) |
| 36 | static char sccsid[] = "@(#)kvm.c 5.18 (Berkeley) 5/7/91"; |
| 37 | #endif /* LIBC_SCCS and not lint */ |
| 38 | |
| 39 | #define DEBUG 0 |
| 40 | |
| 41 | #include <sys/param.h> |
| 42 | #include <sys/user.h> |
| 43 | #include <sys/proc.h> |
| 44 | #include <sys/ioctl.h> |
| 45 | #include <sys/kinfo.h> |
| 46 | #include <sys/tty.h> |
| 47 | #include <sys/file.h> |
| 48 | #include <sys/types.h> |
| 49 | #include <machine/vmparam.h> |
| 50 | #include <fcntl.h> |
| 51 | #include <nlist.h> |
| 52 | #include <kvm.h> |
| 53 | #include <ndbm.h> |
| 54 | #include <limits.h> |
| 55 | #include <paths.h> |
| 56 | #include <stdio.h> |
| 57 | #include <string.h> |
| 58 | #include <sys/mman.h> |
| 59 | |
| 60 | #define btop(x) (((unsigned)(x)) >> PGSHIFT) /* XXX */ |
| 61 | #define ptob(x) ((caddr_t)((x) << PGSHIFT)) /* XXX */ |
| 62 | #include <vm/vm.h> /* ??? kinfo_proc currently includes this*/ |
| 63 | #include <vm/vm_page.h> |
| 64 | #include <vm/swap_pager.h> |
| 65 | #include <sys/kinfo_proc.h> |
| 66 | |
| 67 | /* |
| 68 | * files |
| 69 | */ |
| 70 | static const char *unixf, *memf, *kmemf, *swapf; |
| 71 | static int unixx, mem, kmem, swap; |
| 72 | static DBM *db; |
| 73 | /* |
| 74 | * flags |
| 75 | */ |
| 76 | static int deadkernel; |
| 77 | static int kvminit = 0; |
| 78 | static int kvmfilesopen = 0; |
| 79 | /* |
| 80 | * state |
| 81 | */ |
| 82 | static struct kinfo_proc *kvmprocbase, *kvmprocptr; |
| 83 | static int kvmnprocs; |
| 84 | /* |
| 85 | * u. buffer |
| 86 | */ |
| 87 | static union { |
| 88 | struct user user; |
| 89 | char upages[UPAGES][NBPG]; |
| 90 | } user; |
| 91 | |
| 92 | struct swapblk { |
| 93 | long offset; /* offset in swap device */ |
| 94 | long size; /* remaining size of block in swap device */ |
| 95 | }; |
| 96 | /* |
| 97 | * random other stuff |
| 98 | */ |
| 99 | static int dmmin, dmmax; |
| 100 | static int pcbpf; |
| 101 | static int argaddr0; /* XXX */ |
| 102 | static int argaddr1; |
| 103 | static int swaddr; |
| 104 | static int nswap; |
| 105 | static char *tmp; |
| 106 | static struct pde *PTD; |
| 107 | |
| 108 | #define basename(cp) ((tmp=rindex((cp), '/')) ? tmp+1 : (cp)) |
| 109 | #define MAXSYMSIZE 256 |
| 110 | |
| 111 | #ifndef pftoc |
| 112 | #define pftoc(f) (f) |
| 113 | #endif |
| 114 | #ifndef iskva |
| 115 | #define iskva(v) ((u_long)(v) & KERNBASE) |
| 116 | #endif |
| 117 | |
| 118 | static struct nlist nl[] = { |
| 119 | { "_Usrptmap" }, |
| 120 | #define X_USRPTMAP 0 |
| 121 | { "_usrpt" }, |
| 122 | #define X_USRPT 1 |
| 123 | { "_nswap" }, |
| 124 | #define X_NSWAP 2 |
| 125 | { "_dmmin" }, |
| 126 | #define X_DMMIN 3 |
| 127 | { "_dmmax" }, |
| 128 | #define X_DMMAX 4 |
| 129 | { "_vm_page_buckets" }, |
| 130 | #define X_VM_PAGE_BUCKETS 5 |
| 131 | { "_vm_page_hash_mask" }, |
| 132 | #define X_VM_PAGE_HASH_MASK 6 |
| 133 | { "_page_shift" }, |
| 134 | #define X_PAGE_SHIFT 7 |
| 135 | { "_kstack" }, |
| 136 | #define X_KSTACK 8 |
| 137 | { "_kernel_object" }, |
| 138 | #define X_KERNEL_OBJECT 9 |
| 139 | { "_btext",}, |
| 140 | #define X_KERNEL_BTEXT 10 |
| 141 | /* |
| 142 | * everything here and down, only if a dead kernel |
| 143 | */ |
| 144 | { "_Sysmap" }, |
| 145 | #define X_SYSMAP 11 |
| 146 | #define X_DEADKERNEL X_SYSMAP |
| 147 | { "_Syssize" }, |
| 148 | #define X_SYSSIZE 12 |
| 149 | { "_allproc" }, |
| 150 | #define X_ALLPROC 13 |
| 151 | { "_zombproc" }, |
| 152 | #define X_ZOMBPROC 14 |
| 153 | { "_nproc" }, |
| 154 | #define X_NPROC 15 |
| 155 | #define X_LAST 15 |
| 156 | { "_IdlePTD" }, |
| 157 | #define X_IdlePTD (X_LAST+1) |
| 158 | { "" }, |
| 159 | }; |
| 160 | |
| 161 | static off_t Vtophys(); |
| 162 | static void klseek(), seterr(), setsyserr(), vstodb(); |
| 163 | static int getkvars(), kvm_doprocs(), kvm_init(); |
| 164 | static int findpage(); |
| 165 | |
| 166 | /* |
| 167 | * returns 0 if files were opened now, |
| 168 | * 1 if files were already opened, |
| 169 | * -1 if files could not be opened. |
| 170 | */ |
| 171 | kvm_openfiles(uf, mf, sf) |
| 172 | const char *uf, *mf, *sf; |
| 173 | { |
| 174 | if (kvmfilesopen) |
| 175 | return (1); |
| 176 | unixx = mem = kmem = swap = -1; |
| 177 | unixf = (uf == NULL) ? _PATH_UNIX : uf; |
| 178 | memf = (mf == NULL) ? _PATH_MEM : mf; |
| 179 | |
| 180 | if ((unixx = open(unixf, O_RDONLY, 0)) == -1) { |
| 181 | setsyserr("can't open %s", unixf); |
| 182 | goto failed; |
| 183 | } |
| 184 | if ((mem = open(memf, O_RDONLY, 0)) == -1) { |
| 185 | setsyserr("can't open %s", memf); |
| 186 | goto failed; |
| 187 | } |
| 188 | if (sf != NULL) |
| 189 | swapf = sf; |
| 190 | if (mf != NULL) { |
| 191 | deadkernel++; |
| 192 | kmemf = mf; |
| 193 | kmem = mem; |
| 194 | swap = -1; |
| 195 | } else { |
| 196 | kmemf = _PATH_KMEM; |
| 197 | if ((kmem = open(kmemf, O_RDONLY, 0)) == -1) { |
| 198 | setsyserr("can't open %s", kmemf); |
| 199 | goto failed; |
| 200 | } |
| 201 | swapf = (sf == NULL) ? _PATH_DRUM : sf; |
| 202 | /* |
| 203 | * live kernel - avoid looking up nlist entries |
| 204 | * past X_DEADKERNEL. |
| 205 | */ |
| 206 | nl[X_DEADKERNEL].n_name = ""; |
| 207 | } |
| 208 | if (swapf != NULL && ((swap = open(swapf, O_RDONLY, 0)) == -1)) { |
| 209 | seterr("can't open %s", swapf); |
| 210 | goto failed; |
| 211 | } |
| 212 | kvmfilesopen++; |
| 213 | if (kvminit == 0 && kvm_init(NULL, NULL, NULL, 0) == -1) /*XXX*/ |
| 214 | return (-1); |
| 215 | return (0); |
| 216 | failed: |
| 217 | kvm_close(); |
| 218 | return (-1); |
| 219 | } |
| 220 | |
| 221 | static |
| 222 | kvm_init(uf, mf, sf) |
| 223 | char *uf, *mf, *sf; |
| 224 | { |
| 225 | if (kvmfilesopen == 0 && kvm_openfiles(NULL, NULL, NULL) == -1) |
| 226 | return (-1); |
| 227 | if (getkvars() == -1) |
| 228 | return (-1); |
| 229 | kvminit = 1; |
| 230 | |
| 231 | return (0); |
| 232 | } |
| 233 | |
| 234 | kvm_close() |
| 235 | { |
| 236 | if (unixx != -1) { |
| 237 | close(unixx); |
| 238 | unixx = -1; |
| 239 | } |
| 240 | if (kmem != -1) { |
| 241 | if (kmem != mem) |
| 242 | close(kmem); |
| 243 | /* otherwise kmem is a copy of mem, and will be closed below */ |
| 244 | kmem = -1; |
| 245 | } |
| 246 | if (mem != -1) { |
| 247 | close(mem); |
| 248 | mem = -1; |
| 249 | } |
| 250 | if (swap != -1) { |
| 251 | close(swap); |
| 252 | swap = -1; |
| 253 | } |
| 254 | if (db != NULL) { |
| 255 | dbm_close(db); |
| 256 | db = NULL; |
| 257 | } |
| 258 | kvminit = 0; |
| 259 | kvmfilesopen = 0; |
| 260 | deadkernel = 0; |
| 261 | } |
| 262 | |
| 263 | kvm_nlist(nl) |
| 264 | struct nlist *nl; |
| 265 | { |
| 266 | datum key, data; |
| 267 | char dbname[MAXPATHLEN]; |
| 268 | char dbversion[_POSIX2_LINE_MAX]; |
| 269 | char kversion[_POSIX2_LINE_MAX]; |
| 270 | int dbversionlen; |
| 271 | char symbuf[MAXSYMSIZE]; |
| 272 | struct nlist nbuf, *n; |
| 273 | int num, did; |
| 274 | |
| 275 | if (kvmfilesopen == 0 && kvm_openfiles(NULL, NULL, NULL) == -1) |
| 276 | return (-1); |
| 277 | if (deadkernel) |
| 278 | goto hard2; |
| 279 | /* |
| 280 | * initialize key datum |
| 281 | */ |
| 282 | key.dptr = symbuf; |
| 283 | |
| 284 | if (db != NULL) |
| 285 | goto win; /* off to the races */ |
| 286 | /* |
| 287 | * open database |
| 288 | */ |
| 289 | sprintf(dbname, "%s/kvm_%s", _PATH_VARRUN, basename(unixf)); |
| 290 | if ((db = dbm_open(dbname, O_RDONLY, 0)) == NULL) |
| 291 | goto hard2; |
| 292 | /* |
| 293 | * read version out of database |
| 294 | */ |
| 295 | bcopy("VERSION", symbuf, sizeof ("VERSION")-1); |
| 296 | key.dsize = (sizeof ("VERSION") - 1); |
| 297 | data = dbm_fetch(db, key); |
| 298 | if (data.dptr == NULL) |
| 299 | goto hard1; |
| 300 | bcopy(data.dptr, dbversion, data.dsize); |
| 301 | dbversionlen = data.dsize; |
| 302 | /* |
| 303 | * read version string from kernel memory |
| 304 | */ |
| 305 | bcopy("_version", symbuf, sizeof ("_version")-1); |
| 306 | key.dsize = (sizeof ("_version")-1); |
| 307 | data = dbm_fetch(db, key); |
| 308 | if (data.dptr == NULL) |
| 309 | goto hard1; |
| 310 | if (data.dsize != sizeof (struct nlist)) |
| 311 | goto hard1; |
| 312 | bcopy(data.dptr, &nbuf, sizeof (struct nlist)); |
| 313 | lseek(kmem, nbuf.n_value, 0); |
| 314 | if (read(kmem, kversion, dbversionlen) != dbversionlen) |
| 315 | goto hard1; |
| 316 | /* |
| 317 | * if they match, we win - otherwise do it the hard way |
| 318 | */ |
| 319 | if (bcmp(dbversion, kversion, dbversionlen) != 0) |
| 320 | goto hard1; |
| 321 | /* |
| 322 | * getem from the database. |
| 323 | */ |
| 324 | win: |
| 325 | num = did = 0; |
| 326 | for (n = nl; n->n_name && n->n_name[0]; n++, num++) { |
| 327 | int len; |
| 328 | /* |
| 329 | * clear out fields from users buffer |
| 330 | */ |
| 331 | n->n_type = 0; |
| 332 | n->n_other = 0; |
| 333 | n->n_desc = 0; |
| 334 | n->n_value = 0; |
| 335 | /* |
| 336 | * query db |
| 337 | */ |
| 338 | if ((len = strlen(n->n_name)) > MAXSYMSIZE) { |
| 339 | seterr("symbol too large"); |
| 340 | return (-1); |
| 341 | } |
| 342 | (void)strcpy(symbuf, n->n_name); |
| 343 | key.dsize = len; |
| 344 | data = dbm_fetch(db, key); |
| 345 | if (data.dptr == NULL || data.dsize != sizeof (struct nlist)) |
| 346 | continue; |
| 347 | bcopy(data.dptr, &nbuf, sizeof (struct nlist)); |
| 348 | n->n_value = nbuf.n_value; |
| 349 | n->n_type = nbuf.n_type; |
| 350 | n->n_desc = nbuf.n_desc; |
| 351 | n->n_other = nbuf.n_other; |
| 352 | did++; |
| 353 | } |
| 354 | return (num - did); |
| 355 | hard1: |
| 356 | dbm_close(db); |
| 357 | db = NULL; |
| 358 | hard2: |
| 359 | num = nlist(unixf, nl); |
| 360 | if (num == -1) |
| 361 | seterr("nlist (hard way) failed"); |
| 362 | return (num); |
| 363 | } |
| 364 | |
| 365 | kvm_getprocs(what, arg) |
| 366 | int what, arg; |
| 367 | { |
| 368 | static int ocopysize = -1; |
| 369 | |
| 370 | if (kvminit == 0 && kvm_init(NULL, NULL, NULL, 0) == -1) |
| 371 | return (NULL); |
| 372 | if (!deadkernel) { |
| 373 | int ret, copysize; |
| 374 | |
| 375 | if ((ret = getkerninfo(what, NULL, NULL, arg)) == -1) { |
| 376 | setsyserr("can't get estimate for kerninfo"); |
| 377 | return (-1); |
| 378 | } |
| 379 | copysize = ret; |
| 380 | if ((copysize > ocopysize || |
| 381 | kvmprocbase == (struct kinfo_proc *) NULL) && |
| 382 | (kvmprocbase = (struct kinfo_proc *) |
| 383 | realloc(kvmprocbase, copysize)) == NULL) { |
| 384 | seterr("out of memory"); |
| 385 | return (-1); |
| 386 | } |
| 387 | ocopysize = copysize; |
| 388 | if ((ret = getkerninfo(what, kvmprocbase, ©size, |
| 389 | arg)) == -1) { |
| 390 | setsyserr("can't get proc list"); |
| 391 | return (-1); |
| 392 | } |
| 393 | if (copysize % sizeof (struct kinfo_proc)) { |
| 394 | seterr("proc size mismatch (got %d total, kinfo_proc: %d)", |
| 395 | copysize, sizeof (struct kinfo_proc)); |
| 396 | return (-1); |
| 397 | } |
| 398 | kvmnprocs = copysize / sizeof (struct kinfo_proc); |
| 399 | } else { |
| 400 | int nproc; |
| 401 | |
| 402 | if (kvm_read((void *) nl[X_NPROC].n_value, &nproc, |
| 403 | sizeof (int)) != sizeof (int)) { |
| 404 | seterr("can't read nproc"); |
| 405 | return (-1); |
| 406 | } |
| 407 | if ((kvmprocbase = (struct kinfo_proc *) |
| 408 | malloc(nproc * sizeof (struct kinfo_proc))) == NULL) { |
| 409 | seterr("out of memory (addr: %x nproc = %d)", |
| 410 | nl[X_NPROC].n_value, nproc); |
| 411 | return (-1); |
| 412 | } |
| 413 | kvmnprocs = kvm_doprocs(what, arg, kvmprocbase); |
| 414 | realloc(kvmprocbase, kvmnprocs * sizeof (struct kinfo_proc)); |
| 415 | } |
| 416 | kvmprocptr = kvmprocbase; |
| 417 | |
| 418 | return (kvmnprocs); |
| 419 | } |
| 420 | |
| 421 | /* |
| 422 | * XXX - should NOT give up so easily - especially since the kernel |
| 423 | * may be corrupt (it died). Should gather as much information as possible. |
| 424 | * Follows proc ptrs instead of reading table since table may go |
| 425 | * away soon. |
| 426 | */ |
| 427 | static |
| 428 | kvm_doprocs(what, arg, buff) |
| 429 | int what, arg; |
| 430 | char *buff; |
| 431 | { |
| 432 | struct proc *p, proc; |
| 433 | register char *bp = buff; |
| 434 | int i = 0; |
| 435 | int doingzomb = 0; |
| 436 | struct eproc eproc; |
| 437 | struct pgrp pgrp; |
| 438 | struct session sess; |
| 439 | struct tty tty; |
| 440 | |
| 441 | /* allproc */ |
| 442 | if (kvm_read((void *) nl[X_ALLPROC].n_value, &p, |
| 443 | sizeof (struct proc *)) != sizeof (struct proc *)) { |
| 444 | seterr("can't read allproc"); |
| 445 | return (-1); |
| 446 | } |
| 447 | |
| 448 | again: |
| 449 | for (; p; p = proc.p_nxt) { |
| 450 | if (kvm_read(p, &proc, sizeof (struct proc)) != |
| 451 | sizeof (struct proc)) { |
| 452 | seterr("can't read proc at %x", p); |
| 453 | return (-1); |
| 454 | } |
| 455 | if (kvm_read(proc.p_cred, &eproc.e_pcred, |
| 456 | sizeof (struct pcred)) == sizeof (struct pcred)) |
| 457 | (void) kvm_read(eproc.e_pcred.pc_ucred, &eproc.e_ucred, |
| 458 | sizeof (struct ucred)); |
| 459 | switch(ki_op(what)) { |
| 460 | |
| 461 | case KINFO_PROC_PID: |
| 462 | if (proc.p_pid != (pid_t)arg) |
| 463 | continue; |
| 464 | break; |
| 465 | |
| 466 | |
| 467 | case KINFO_PROC_UID: |
| 468 | if (eproc.e_ucred.cr_uid != (uid_t)arg) |
| 469 | continue; |
| 470 | break; |
| 471 | |
| 472 | case KINFO_PROC_RUID: |
| 473 | if (eproc.e_pcred.p_ruid != (uid_t)arg) |
| 474 | continue; |
| 475 | break; |
| 476 | } |
| 477 | /* |
| 478 | * gather eproc |
| 479 | */ |
| 480 | eproc.e_paddr = p; |
| 481 | if (kvm_read(proc.p_pgrp, &pgrp, sizeof (struct pgrp)) != |
| 482 | sizeof (struct pgrp)) { |
| 483 | seterr("can't read pgrp at %x", proc.p_pgrp); |
| 484 | return (-1); |
| 485 | } |
| 486 | eproc.e_sess = pgrp.pg_session; |
| 487 | eproc.e_pgid = pgrp.pg_id; |
| 488 | eproc.e_jobc = pgrp.pg_jobc; |
| 489 | if (kvm_read(pgrp.pg_session, &sess, sizeof (struct session)) |
| 490 | != sizeof (struct session)) { |
| 491 | seterr("can't read session at %x", pgrp.pg_session); |
| 492 | return (-1); |
| 493 | } |
| 494 | if ((proc.p_flag&SCTTY) && sess.s_ttyp != NULL) { |
| 495 | if (kvm_read(sess.s_ttyp, &tty, sizeof (struct tty)) |
| 496 | != sizeof (struct tty)) { |
| 497 | seterr("can't read tty at %x", sess.s_ttyp); |
| 498 | return (-1); |
| 499 | } |
| 500 | eproc.e_tdev = tty.t_dev; |
| 501 | eproc.e_tsess = tty.t_session; |
| 502 | if (tty.t_pgrp != NULL) { |
| 503 | if (kvm_read(tty.t_pgrp, &pgrp, sizeof (struct |
| 504 | pgrp)) != sizeof (struct pgrp)) { |
| 505 | seterr("can't read tpgrp at &x", |
| 506 | tty.t_pgrp); |
| 507 | return (-1); |
| 508 | } |
| 509 | eproc.e_tpgid = pgrp.pg_id; |
| 510 | } else |
| 511 | eproc.e_tpgid = -1; |
| 512 | } else |
| 513 | eproc.e_tdev = NODEV; |
| 514 | if (proc.p_wmesg) |
| 515 | kvm_read(proc.p_wmesg, eproc.e_wmesg, WMESGLEN); |
| 516 | (void) kvm_read(proc.p_vmspace, &eproc.e_vm, |
| 517 | sizeof (struct vmspace)); |
| 518 | eproc.e_xsize = eproc.e_xrssize = |
| 519 | eproc.e_xccount = eproc.e_xswrss = 0; |
| 520 | |
| 521 | switch(ki_op(what)) { |
| 522 | |
| 523 | case KINFO_PROC_PGRP: |
| 524 | if (eproc.e_pgid != (pid_t)arg) |
| 525 | continue; |
| 526 | break; |
| 527 | |
| 528 | case KINFO_PROC_TTY: |
| 529 | if ((proc.p_flag&SCTTY) == 0 || |
| 530 | eproc.e_tdev != (dev_t)arg) |
| 531 | continue; |
| 532 | break; |
| 533 | } |
| 534 | |
| 535 | i++; |
| 536 | bcopy(&proc, bp, sizeof (struct proc)); |
| 537 | bp += sizeof (struct proc); |
| 538 | bcopy(&eproc, bp, sizeof (struct eproc)); |
| 539 | bp+= sizeof (struct eproc); |
| 540 | } |
| 541 | if (!doingzomb) { |
| 542 | /* zombproc */ |
| 543 | if (kvm_read((void *) nl[X_ZOMBPROC].n_value, &p, |
| 544 | sizeof (struct proc *)) != sizeof (struct proc *)) { |
| 545 | seterr("can't read zombproc"); |
| 546 | return (-1); |
| 547 | } |
| 548 | doingzomb = 1; |
| 549 | goto again; |
| 550 | } |
| 551 | |
| 552 | return (i); |
| 553 | } |
| 554 | |
| 555 | struct proc * |
| 556 | kvm_nextproc() |
| 557 | { |
| 558 | |
| 559 | if (!kvmprocbase && kvm_getprocs(0, 0) == -1) |
| 560 | return (NULL); |
| 561 | if (kvmprocptr >= (kvmprocbase + kvmnprocs)) { |
| 562 | #if 0 |
| 563 | seterr("end of proc list"); |
| 564 | #endif |
| 565 | return (NULL); |
| 566 | } |
| 567 | return((struct proc *)(kvmprocptr++)); |
| 568 | } |
| 569 | |
| 570 | struct eproc * |
| 571 | kvm_geteproc(p) |
| 572 | const struct proc *p; |
| 573 | { |
| 574 | return ((struct eproc *)(((char *)p) + sizeof (struct proc))); |
| 575 | } |
| 576 | |
| 577 | kvm_setproc() |
| 578 | { |
| 579 | kvmprocptr = kvmprocbase; |
| 580 | } |
| 581 | |
| 582 | kvm_freeprocs() |
| 583 | { |
| 584 | |
| 585 | if (kvmprocbase) { |
| 586 | free(kvmprocbase); |
| 587 | kvmprocbase = NULL; |
| 588 | } |
| 589 | } |
| 590 | |
| 591 | proc_getmem(const struct proc *p, void *buffer, vm_offset_t size, vm_offset_t offset) { |
| 592 | int fd; |
| 593 | char fn[512+1]; |
| 594 | sprintf(fn,"/proc/%d",p->p_pid); |
| 595 | if (p->p_flag & SSYS) |
| 596 | return 0; |
| 597 | fd = open(fn,O_RDONLY); |
| 598 | if (fd == -1) { |
| 599 | return 0; |
| 600 | } |
| 601 | |
| 602 | if (lseek(fd, offset, 0) == -1) { |
| 603 | close(fd); |
| 604 | return 0; |
| 605 | } |
| 606 | if (read(fd, buffer, size) <= 0) { |
| 607 | close(fd); |
| 608 | return 0; |
| 609 | } |
| 610 | close(fd); |
| 611 | return 1; |
| 612 | } |
| 613 | |
| 614 | struct user * |
| 615 | kvm_getu(p) |
| 616 | const struct proc *p; |
| 617 | { |
| 618 | register struct kinfo_proc *kp = (struct kinfo_proc *)p; |
| 619 | register int i; |
| 620 | register char *up; |
| 621 | u_int vaddr; |
| 622 | int arg_size; |
| 623 | |
| 624 | if (kvminit == 0 && kvm_init(NULL, NULL, NULL, 0) == -1) |
| 625 | return (NULL); |
| 626 | if (p->p_stat == SZOMB) { |
| 627 | seterr("zombie process"); |
| 628 | return (NULL); |
| 629 | } |
| 630 | |
| 631 | if (!deadkernel) { |
| 632 | if (proc_getmem(p, user.upages, sizeof user.upages, USRSTACK)) { |
| 633 | kp->kp_eproc.e_vm.vm_rssize = |
| 634 | kp->kp_eproc.e_vm.vm_pmap.pm_stats.resident_count; /* XXX */ |
| 635 | return &user.user; |
| 636 | } |
| 637 | } |
| 638 | |
| 639 | argaddr0 = argaddr1 = 0; |
| 640 | /* |
| 641 | * Read u-area one page at a time for the benefit of post-mortems |
| 642 | */ |
| 643 | up = (char *) p->p_addr; |
| 644 | for (i = 0; i < UPAGES; i++) { |
| 645 | klseek(kmem, (long)up, 0); |
| 646 | if (read(kmem, user.upages[i], CLBYTES) != CLBYTES) { |
| 647 | seterr("cant read page %x of u of pid %d from %s", |
| 648 | up, p->p_pid, kmemf); |
| 649 | return(NULL); |
| 650 | } |
| 651 | up += CLBYTES; |
| 652 | } |
| 653 | |
| 654 | pcbpf = (int) btop(p->p_addr); /* what should this be really? */ |
| 655 | /* |
| 656 | * Conjure up a physical address for the arguments. |
| 657 | */ |
| 658 | kp->kp_eproc.e_vm.vm_rssize = |
| 659 | kp->kp_eproc.e_vm.vm_pmap.pm_stats.resident_count; /* XXX */ |
| 660 | |
| 661 | vaddr = (u_int)kp->kp_eproc.e_vm.vm_minsaddr; |
| 662 | arg_size = USRSTACK - vaddr; |
| 663 | |
| 664 | if (kp->kp_eproc.e_vm.vm_pmap.pm_pdir) { |
| 665 | struct pde pde; |
| 666 | |
| 667 | klseek(kmem, |
| 668 | (long)(&kp->kp_eproc.e_vm.vm_pmap.pm_pdir[pdei(vaddr)]), 0); |
| 669 | |
| 670 | if (read(kmem, (char *)&pde, sizeof pde) == sizeof pde |
| 671 | && pde.pd_v) { |
| 672 | |
| 673 | struct pte pte; |
| 674 | |
| 675 | if (lseek(mem, (long)ctob(pde.pd_pfnum) + |
| 676 | (ptei(vaddr) * sizeof pte), 0) == -1) |
| 677 | seterr("kvm_getu: lseek"); |
| 678 | if (read(mem, (char *)&pte, sizeof pte) == sizeof pte) { |
| 679 | if (pte.pg_v) { |
| 680 | argaddr1 = (pte.pg_pfnum << PGSHIFT) | |
| 681 | ((u_long)vaddr & (NBPG-1)); |
| 682 | } |
| 683 | } else { |
| 684 | seterr("kvm_getu: read"); |
| 685 | } |
| 686 | } |
| 687 | } |
| 688 | |
| 689 | return(&user.user); |
| 690 | } |
| 691 | |
| 692 | char * |
| 693 | kvm_getargs(p, up) |
| 694 | const struct proc *p; |
| 695 | const struct user *up; |
| 696 | { |
| 697 | int arg_size, arg_offset; |
| 698 | static char cmdbuf[ARG_MAX]; |
| 699 | char argc[ARG_MAX*3]; |
| 700 | int *argv; |
| 701 | register char *cp; |
| 702 | char c; |
| 703 | int nbad; |
| 704 | char *cmdbufp; |
| 705 | vm_offset_t vaddr; |
| 706 | char procfile[16]; |
| 707 | int mmfd; |
| 708 | #if 0 |
| 709 | char *argc = NULL; |
| 710 | #endif |
| 711 | |
| 712 | *cmdbuf = 0; |
| 713 | |
| 714 | vaddr = (u_int)((struct kinfo_proc *)p)->kp_eproc.e_vm.vm_minsaddr; |
| 715 | arg_size = USRSTACK - vaddr; |
| 716 | |
| 717 | if (arg_size >= 3*ARG_MAX) |
| 718 | goto bad; |
| 719 | |
| 720 | #if 0 |
| 721 | sprintf(procfile, "/proc/%d", p->p_pid); |
| 722 | if ((mmfd = open(procfile, O_RDONLY, 0)) == -1) { |
| 723 | printf("failed to open %s\n",procfile); |
| 724 | goto bad; |
| 725 | } |
| 726 | |
| 727 | if ((argc = mmap(0, arg_size, PROT_READ, MAP_FILE, mmfd, vaddr)) |
| 728 | == (char *)-1) { |
| 729 | printf("failed to mmap %s error=%s\n", procfile, strerror(errno)); |
| 730 | goto bad; |
| 731 | } |
| 732 | #endif |
| 733 | |
| 734 | if (!proc_getmem(p, argc, arg_size, vaddr)) { |
| 735 | if ((p->p_flag & SLOAD) == 0 || argaddr1 == 0) { |
| 736 | goto bad; |
| 737 | } else { |
| 738 | lseek(mem, (long)argaddr1, 0); |
| 739 | if (read(mem, argc, arg_size) != arg_size) |
| 740 | goto bad; |
| 741 | } |
| 742 | } |
| 743 | |
| 744 | argv = (int *)argc; |
| 745 | |
| 746 | arg_offset = argv[0] - vaddr; |
| 747 | if (arg_offset >= 3*ARG_MAX) |
| 748 | goto bad; |
| 749 | |
| 750 | nbad = 0; |
| 751 | |
| 752 | cmdbufp = cmdbuf; |
| 753 | for (cp = &argc[arg_offset]; cp < &argc[arg_size]; cp++, cmdbufp++) { |
| 754 | c = *cmdbufp = *cp; |
| 755 | if (c == 0) { /* convert null between arguments to space */ |
| 756 | *cmdbufp = ' '; |
| 757 | if (*(cp+1) == 0) break; /* if null argument follows then no more args */ |
| 758 | } |
| 759 | else if (c < ' ' || c > 0176) { |
| 760 | if (++nbad >= 5*(0+1)) { /* eflg -> 0 XXX */ /* limit number of bad chars to 5 */ |
| 761 | *cmdbufp++ = '?'; |
| 762 | break; |
| 763 | } |
| 764 | *cmdbufp = '?'; |
| 765 | } |
| 766 | else if (0 == 0 && c == '=') { /* eflg -> 0 XXX */ |
| 767 | while (*--cmdbufp != ' ') |
| 768 | if (cmdbufp <= cmdbuf) |
| 769 | break; |
| 770 | break; |
| 771 | } |
| 772 | } |
| 773 | *cmdbufp = 0; |
| 774 | |
| 775 | while (*--cmdbufp == ' ') |
| 776 | *cmdbufp = 0; |
| 777 | |
| 778 | if (cmdbuf[0] == '-' || cmdbuf[0] == '?' || cmdbuf[0] <= ' ') { |
| 779 | bad: |
| 780 | (void) strcat(cmdbuf, " ("); |
| 781 | (void) strncat(cmdbuf, p->p_comm, sizeof(p->p_comm)); |
| 782 | (void) strcat(cmdbuf, ")"); |
| 783 | } |
| 784 | #if 0 |
| 785 | if (argc && argc != (char *)-1) |
| 786 | munmap(argc, arg_size); |
| 787 | if (mmfd && mmfd != -1) |
| 788 | close (mmfd); |
| 789 | #endif |
| 790 | return (cmdbuf); |
| 791 | } |
| 792 | |
| 793 | |
| 794 | static |
| 795 | getkvars() |
| 796 | { |
| 797 | if (kvm_nlist(nl) == -1) |
| 798 | return (-1); |
| 799 | if (deadkernel) { |
| 800 | /* We must do the sys map first because klseek uses it */ |
| 801 | long addr; |
| 802 | |
| 803 | PTD = (struct pde *) malloc(NBPG); |
| 804 | if (PTD == NULL) { |
| 805 | seterr("out of space for PTD"); |
| 806 | return (-1); |
| 807 | } |
| 808 | addr = (long) nl[X_IdlePTD].n_value; |
| 809 | (void) lseek(kmem, addr, 0); |
| 810 | read(kmem, (char *)&addr, sizeof(addr)); |
| 811 | (void) lseek(kmem, (long)addr, 0); |
| 812 | if (read(kmem, (char *) PTD, NBPG) != NBPG) { |
| 813 | seterr("can't read PTD"); |
| 814 | return (-1); |
| 815 | } |
| 816 | } |
| 817 | if (kvm_read((void *) nl[X_NSWAP].n_value, &nswap, sizeof (long)) != |
| 818 | sizeof (long)) { |
| 819 | seterr("can't read nswap"); |
| 820 | return (-1); |
| 821 | } |
| 822 | if (kvm_read((void *) nl[X_DMMIN].n_value, &dmmin, sizeof (long)) != |
| 823 | sizeof (long)) { |
| 824 | seterr("can't read dmmin"); |
| 825 | return (-1); |
| 826 | } |
| 827 | if (kvm_read((void *) nl[X_DMMAX].n_value, &dmmax, sizeof (long)) != |
| 828 | sizeof (long)) { |
| 829 | seterr("can't read dmmax"); |
| 830 | return (-1); |
| 831 | } |
| 832 | return (0); |
| 833 | } |
| 834 | |
| 835 | kvm_read(loc, buf, len) |
| 836 | void *loc; |
| 837 | void *buf; |
| 838 | { |
| 839 | if (kvmfilesopen == 0 && kvm_openfiles(NULL, NULL, NULL) == -1) |
| 840 | return (-1); |
| 841 | if (iskva(loc)) { |
| 842 | klseek(kmem, (off_t) loc, 0); |
| 843 | if (read(kmem, buf, len) != len) { |
| 844 | seterr("error reading kmem at %x", loc); |
| 845 | return (-1); |
| 846 | } |
| 847 | } else { |
| 848 | lseek(mem, (off_t) loc, 0); |
| 849 | if (read(mem, buf, len) != len) { |
| 850 | seterr("error reading mem at %x", loc); |
| 851 | return (-1); |
| 852 | } |
| 853 | } |
| 854 | return (len); |
| 855 | } |
| 856 | |
| 857 | static void |
| 858 | klseek(fd, loc, off) |
| 859 | int fd; |
| 860 | off_t loc; |
| 861 | int off; |
| 862 | { |
| 863 | |
| 864 | if (deadkernel) { |
| 865 | if ((loc = Vtophys(loc)) == -1) |
| 866 | return; |
| 867 | } |
| 868 | (void) lseek(fd, (off_t)loc, off); |
| 869 | } |
| 870 | |
| 871 | static off_t |
| 872 | Vtophys(loc) |
| 873 | u_long loc; |
| 874 | { |
| 875 | off_t newloc = (off_t) -1; |
| 876 | struct pde pde; |
| 877 | struct pte pte; |
| 878 | int p; |
| 879 | |
| 880 | pde = PTD[loc >> PD_SHIFT]; |
| 881 | if (pde.pd_v == 0) { |
| 882 | seterr("vtophys: page directory entry not valid"); |
| 883 | return((off_t) -1); |
| 884 | } |
| 885 | p = btop(loc & PT_MASK); |
| 886 | newloc = pde.pd_pfnum + (p * sizeof(struct pte)); |
| 887 | (void) lseek(kmem, (long)newloc, 0); |
| 888 | if (read(kmem, (char *)&pte, sizeof pte) != sizeof pte) { |
| 889 | seterr("vtophys: cannot obtain desired pte"); |
| 890 | return((off_t) -1); |
| 891 | } |
| 892 | newloc = pte.pg_pfnum; |
| 893 | if (pte.pg_v == 0) { |
| 894 | seterr("vtophys: page table entry not valid"); |
| 895 | return((off_t) -1); |
| 896 | } |
| 897 | newloc += (loc & PGOFSET); |
| 898 | return((off_t) newloc); |
| 899 | } |
| 900 | |
| 901 | /* |
| 902 | * locate address of unwired or swapped page |
| 903 | */ |
| 904 | |
| 905 | |
| 906 | #define KREAD(off, addr, len) \ |
| 907 | (kvm_read((void *)(off), (char *)(addr), (len)) == (len)) |
| 908 | |
| 909 | #define atop(x) (((unsigned)(x)) >> page_shift) |
| 910 | #define vm_page_hash(object, offset) \ |
| 911 | (((unsigned)object+(unsigned)atop(offset))&vm_page_hash_mask) |
| 912 | |
| 913 | static int |
| 914 | findpage(object, offset, maddr) |
| 915 | long object; |
| 916 | long offset; |
| 917 | vm_offset_t *maddr; |
| 918 | { |
| 919 | static long vm_page_hash_mask; |
| 920 | static long vm_page_buckets; |
| 921 | static long page_shift; |
| 922 | queue_head_t bucket; |
| 923 | struct vm_page mem; |
| 924 | long addr, baddr; |
| 925 | |
| 926 | if (vm_page_hash_mask == 0 && !KREAD(nl[X_VM_PAGE_HASH_MASK].n_value, |
| 927 | &vm_page_hash_mask, sizeof (long))) { |
| 928 | seterr("can't read vm_page_hash_mask"); |
| 929 | return 0; |
| 930 | } |
| 931 | if (page_shift == 0 && !KREAD(nl[X_PAGE_SHIFT].n_value, |
| 932 | &page_shift, sizeof (long))) { |
| 933 | seterr("can't read page_shift"); |
| 934 | return 0; |
| 935 | } |
| 936 | if (vm_page_buckets == 0 && !KREAD(nl[X_VM_PAGE_BUCKETS].n_value, |
| 937 | &vm_page_buckets, sizeof (long))) { |
| 938 | seterr("can't read vm_page_buckets"); |
| 939 | return 0; |
| 940 | } |
| 941 | |
| 942 | baddr = vm_page_buckets + vm_page_hash(object,offset) * sizeof(queue_head_t); |
| 943 | if (!KREAD(baddr, &bucket, sizeof (bucket))) { |
| 944 | seterr("can't read vm_page_bucket"); |
| 945 | return 0; |
| 946 | } |
| 947 | |
| 948 | addr = (long)bucket.next; |
| 949 | while (addr != baddr) { |
| 950 | if (!KREAD(addr, &mem, sizeof (mem))) { |
| 951 | seterr("can't read vm_page"); |
| 952 | return 0; |
| 953 | } |
| 954 | if ((long)mem.object == object && mem.offset == offset) { |
| 955 | *maddr = (long)mem.phys_addr; |
| 956 | return 1; |
| 957 | } |
| 958 | addr = (long)mem.hashq.next; |
| 959 | } |
| 960 | return 0; |
| 961 | } |
| 962 | |
| 963 | #include <varargs.h> |
| 964 | static char errbuf[_POSIX2_LINE_MAX]; |
| 965 | |
| 966 | static void |
| 967 | seterr(va_alist) |
| 968 | va_dcl |
| 969 | { |
| 970 | char *fmt; |
| 971 | va_list ap; |
| 972 | |
| 973 | va_start(ap); |
| 974 | fmt = va_arg(ap, char *); |
| 975 | (void) vsnprintf(errbuf, _POSIX2_LINE_MAX, fmt, ap); |
| 976 | #if DEBUG |
| 977 | (void) vfprintf(stderr, fmt, ap); |
| 978 | #endif |
| 979 | va_end(ap); |
| 980 | } |
| 981 | |
| 982 | static void |
| 983 | setsyserr(va_alist) |
| 984 | va_dcl |
| 985 | { |
| 986 | char *fmt, *cp; |
| 987 | va_list ap; |
| 988 | extern int errno; |
| 989 | |
| 990 | va_start(ap); |
| 991 | fmt = va_arg(ap, char *); |
| 992 | (void) vsnprintf(errbuf, _POSIX2_LINE_MAX, fmt, ap); |
| 993 | for (cp=errbuf; *cp; cp++) |
| 994 | ; |
| 995 | snprintf(cp, _POSIX2_LINE_MAX - (cp - errbuf), ": %s", strerror(errno)); |
| 996 | #if DEBUG |
| 997 | (void) fprintf(stderr, "%s\n", errbuf); |
| 998 | #endif |
| 999 | va_end(ap); |
| 1000 | } |
| 1001 | |
| 1002 | char * |
| 1003 | kvm_geterr() |
| 1004 | { |
| 1005 | return (errbuf); |
| 1006 | } |