| 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 is permitted |
| 6 | * provided that all copyright information, including this notice, |
| 7 | * is retained in all such forms, and that any documentation, |
| 8 | * advertising or other materials related to such distribution and |
| 9 | * use acknowledge that the software was |
| 10 | * developed by the University of California, Berkeley. The name |
| 11 | * of the University may not be used to endorse or promote products |
| 12 | * derived from this software without specific prior written permission. |
| 13 | * |
| 14 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR |
| 15 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED |
| 16 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
| 17 | */ |
| 18 | |
| 19 | |
| 20 | #include <machine/pte.h> |
| 21 | #include <sys/param.h> |
| 22 | #include <sys/user.h> |
| 23 | #include <sys/proc.h> |
| 24 | #include <sys/file.h> |
| 25 | #include <sys/text.h> |
| 26 | #include <sys/stat.h> |
| 27 | #include <sys/time.h> |
| 28 | #include <sys/vmmac.h> |
| 29 | #include <sys/ioctl.h> |
| 30 | #include <sys/tty.h> |
| 31 | #include <kvm.h> |
| 32 | #include <ctype.h> |
| 33 | #include <cencode.h> |
| 34 | #include <nlist.h> |
| 35 | #include <pwd.h> |
| 36 | #include <string.h> |
| 37 | #include <ndbm.h> |
| 38 | #include <limits.h> |
| 39 | #include <paths.h> |
| 40 | #include <stdio.h> |
| 41 | |
| 42 | /* |
| 43 | * files |
| 44 | */ |
| 45 | static char *unixf, *memf, *kmemf, *swapf; |
| 46 | static int unixx, mem, kmem, swap; |
| 47 | static DBM *db; |
| 48 | /* |
| 49 | * flags |
| 50 | */ |
| 51 | static int deadkernel; |
| 52 | static int kvminit = 0; |
| 53 | static int kvmfilesopen = 0; |
| 54 | /* |
| 55 | * state |
| 56 | */ |
| 57 | static struct kinfo_proc *kvmprocbase, *kvmprocptr; |
| 58 | static int kvmnprocs; |
| 59 | /* |
| 60 | * u. buffer |
| 61 | */ |
| 62 | static union { |
| 63 | struct user user; |
| 64 | char upages[UPAGES][NBPG]; |
| 65 | } user; |
| 66 | /* |
| 67 | * random other stuff |
| 68 | */ |
| 69 | static struct pte *Usrptmap, *usrpt; |
| 70 | static int dmmin, dmmax; |
| 71 | static struct pte *Sysmap; |
| 72 | static int Syssize; |
| 73 | static int pcbpf; |
| 74 | static int argaddr0; /* XXX */ |
| 75 | static int argaddr1; |
| 76 | static int nswap; |
| 77 | static char *tmp; |
| 78 | |
| 79 | #define basename(cp) ((tmp=rindex((cp), '/')) ? tmp+1 : (cp)) |
| 80 | #define MAXSYMSIZE 256 |
| 81 | |
| 82 | static struct nlist nl[] = { |
| 83 | { "_Usrptmap" }, |
| 84 | #define X_USRPTMAP 0 |
| 85 | { "_usrpt" }, |
| 86 | #define X_USRPT 1 |
| 87 | { "_nswap" }, |
| 88 | #define X_NSWAP 2 |
| 89 | { "_dmmin" }, |
| 90 | #define X_DMMIN 3 |
| 91 | { "_dmmax" }, |
| 92 | #define X_DMMAX 4 |
| 93 | /* |
| 94 | * everything here and down, only if a dead kernel |
| 95 | */ |
| 96 | { "_Sysmap" }, |
| 97 | #define X_SYSMAP 5 |
| 98 | #define X_DEADKERNEL X_SYSMAP |
| 99 | { "_Syssize" }, |
| 100 | #define X_SYSSIZE 6 |
| 101 | { "_allproc" }, |
| 102 | #define X_ALLPROC 7 |
| 103 | { "_zombproc" }, |
| 104 | #define X_ZOMBPROC 8 |
| 105 | { "_nproc" }, |
| 106 | #define X_NPROC 9 |
| 107 | { "" }, |
| 108 | }; |
| 109 | |
| 110 | static char *savestr(); |
| 111 | |
| 112 | /* |
| 113 | * returns 0 if files were opened now, |
| 114 | * 1 if files were already opened, |
| 115 | * -1 if files could not be opened. |
| 116 | */ |
| 117 | kvm_openfiles(uf, mf, sf) |
| 118 | char *uf, *mf, *sf; |
| 119 | { |
| 120 | if (kvmfilesopen) |
| 121 | return (1); |
| 122 | unixx = mem = kmem = swap = -1; |
| 123 | unixf = (uf == NULL) ? _PATH_UNIX : uf; |
| 124 | memf = (mf == NULL) ? _PATH_MEM : mf; |
| 125 | |
| 126 | if ((unixx = open(unixf, O_RDONLY, 0)) == -1) { |
| 127 | setsyserr("can't open %s", unixf); |
| 128 | goto failed; |
| 129 | } |
| 130 | if ((mem = open(memf, O_RDONLY, 0)) == -1) { |
| 131 | setsyserr("can't open %s", memf); |
| 132 | goto failed; |
| 133 | } |
| 134 | if (sf != NULL) |
| 135 | swapf = sf; |
| 136 | if (mf != NULL) { |
| 137 | deadkernel++; |
| 138 | kmemf = mf; |
| 139 | kmem = mem; |
| 140 | swap = -1; |
| 141 | } else { |
| 142 | kmemf = _PATH_KMEM; |
| 143 | if ((kmem = open(kmemf, O_RDONLY, 0)) == -1) { |
| 144 | setsyserr("can't open %s", kmemf); |
| 145 | goto failed; |
| 146 | } |
| 147 | swapf = (sf == NULL) ? _PATH_DRUM : sf; |
| 148 | /* |
| 149 | * live kernel - avoid looking up nlist entries |
| 150 | * past X_DEADKERNEL. |
| 151 | */ |
| 152 | nl[X_DEADKERNEL].n_name = ""; |
| 153 | } |
| 154 | if (swapf != NULL && ((swap = open(swapf, O_RDONLY, 0)) == -1)) { |
| 155 | seterr("can't open %s", swapf); |
| 156 | goto failed; |
| 157 | } |
| 158 | kvmfilesopen++; |
| 159 | return (0); |
| 160 | failed: |
| 161 | kvm_close(); |
| 162 | return (-1); |
| 163 | } |
| 164 | |
| 165 | static |
| 166 | kvm_init(uf, mf, sf) |
| 167 | char *uf, *mf, *sf; |
| 168 | { |
| 169 | if (kvmfilesopen == 0 && kvm_openfiles(NULL, NULL, NULL) == -1) |
| 170 | return (-1); |
| 171 | if (getkvars() == -1) |
| 172 | return (-1); |
| 173 | kvminit = 1; |
| 174 | |
| 175 | return (0); |
| 176 | } |
| 177 | |
| 178 | kvm_close() |
| 179 | { |
| 180 | if (unixx != -1) { |
| 181 | close(unixx); |
| 182 | unixx = -1; |
| 183 | } |
| 184 | if (kmem != -1) { |
| 185 | if (kmem != mem) |
| 186 | close(kmem); |
| 187 | /* otherwise kmem is a copy of mem, and will be closed below */ |
| 188 | kmem = -1; |
| 189 | } |
| 190 | if (mem != -1) { |
| 191 | close(mem); |
| 192 | mem = -1; |
| 193 | } |
| 194 | if (swap != -1) { |
| 195 | close(swap); |
| 196 | swap = -1; |
| 197 | } |
| 198 | if (db != NULL) { |
| 199 | dbm_close(db); |
| 200 | db = NULL; |
| 201 | } |
| 202 | kvminit = 0; |
| 203 | kvmfilesopen = 0; |
| 204 | deadkernel = 0; |
| 205 | if (Sysmap) { |
| 206 | free(Sysmap); |
| 207 | Sysmap = NULL; |
| 208 | } |
| 209 | } |
| 210 | |
| 211 | kvm_nlist(nl) |
| 212 | struct nlist *nl; |
| 213 | { |
| 214 | datum key, data; |
| 215 | char dbname[MAXPATHLEN]; |
| 216 | char dbversion[LINE_MAX]; |
| 217 | char kversion[LINE_MAX]; |
| 218 | int dbversionlen; |
| 219 | char symbuf[MAXSYMSIZE+1]; |
| 220 | struct nlist nbuf, *n; |
| 221 | int num, did; |
| 222 | |
| 223 | if (kvmfilesopen == 0 && kvm_openfiles(NULL, NULL, NULL) == -1) |
| 224 | return (-1); |
| 225 | if (deadkernel) |
| 226 | goto hard2; |
| 227 | /* |
| 228 | * initialize key datum |
| 229 | */ |
| 230 | key.dptr = symbuf; |
| 231 | symbuf[0] = KVMDB_NLIST; |
| 232 | |
| 233 | if (db != NULL) |
| 234 | goto win; /* off to the races */ |
| 235 | /* |
| 236 | * open database |
| 237 | */ |
| 238 | sprintf(dbname, "%s/kvm_%s", KVMDBDIR, basename(unixf)); |
| 239 | if ((db = dbm_open(dbname, O_RDONLY, 0)) == NULL) |
| 240 | goto hard2; |
| 241 | /* |
| 242 | * read version out of database |
| 243 | */ |
| 244 | bcopy("VERSION", symbuf+1, sizeof ("VERSION")-1); |
| 245 | key.dsize = (sizeof ("VERSION") - 1) + 1; |
| 246 | data = dbm_fetch(db, key); |
| 247 | if (data.dptr == NULL) |
| 248 | goto hard1; |
| 249 | bcopy(data.dptr, dbversion, data.dsize); |
| 250 | dbversionlen = data.dsize; |
| 251 | /* |
| 252 | * read version string from kernel memory |
| 253 | */ |
| 254 | bcopy("_version", symbuf+1, sizeof ("_version")-1); |
| 255 | key.dsize = (sizeof ("_version")-1) + 1; |
| 256 | data = dbm_fetch(db, key); |
| 257 | if (data.dptr == NULL) |
| 258 | goto hard1; |
| 259 | if (data.dsize != sizeof (struct nlist)) |
| 260 | goto hard1; |
| 261 | bcopy(data.dptr, &nbuf, sizeof (struct nlist)); |
| 262 | lseek(kmem, nbuf.n_value, 0); |
| 263 | if (read(kmem, kversion, dbversionlen) != dbversionlen) |
| 264 | goto hard1; |
| 265 | /* |
| 266 | * if they match, we win - otherwise do it the hard way |
| 267 | */ |
| 268 | if (bcmp(dbversion, kversion, dbversionlen) != 0) |
| 269 | goto hard1; |
| 270 | /* |
| 271 | * getem from the database. |
| 272 | */ |
| 273 | win: |
| 274 | num = did = 0; |
| 275 | for (n = nl; n->n_name && n->n_name[0]; n++, num++) { |
| 276 | int len; |
| 277 | /* |
| 278 | * clear out fields from users buffer |
| 279 | */ |
| 280 | n->n_type = 0; |
| 281 | n->n_other = 0; |
| 282 | n->n_desc = 0; |
| 283 | n->n_value = 0; |
| 284 | /* |
| 285 | * query db |
| 286 | */ |
| 287 | if ((len = strlen(n->n_name)) > MAXSYMSIZE) { |
| 288 | seterr("kvm_nlist: symbol too large"); |
| 289 | return (-1); |
| 290 | } |
| 291 | strcpy(symbuf+1, n->n_name); |
| 292 | key.dsize = len + 1; |
| 293 | data = dbm_fetch(db, key); |
| 294 | if (data.dptr == NULL || data.dsize != sizeof (struct nlist)) |
| 295 | continue; |
| 296 | bcopy(data.dptr, &nbuf, sizeof (struct nlist)); |
| 297 | n->n_value = nbuf.n_value; |
| 298 | n->n_type = nbuf.n_type; |
| 299 | n->n_desc = nbuf.n_desc; |
| 300 | n->n_other = nbuf.n_other; |
| 301 | did++; |
| 302 | } |
| 303 | return (num - did); |
| 304 | hard1: |
| 305 | dbm_close(db); |
| 306 | db = NULL; |
| 307 | hard2: |
| 308 | return (nlist(unixf, nl)); /* XXX seterr if -1 */ |
| 309 | } |
| 310 | |
| 311 | kvm_getprocs(what, arg) |
| 312 | { |
| 313 | if (kvminit == 0 && kvm_init(NULL, NULL, NULL, 0) == -1) |
| 314 | return (NULL); |
| 315 | if (!deadkernel) { |
| 316 | int ret, copysize; |
| 317 | |
| 318 | if ((ret = getkerninfo(what, NULL, NULL, arg)) == -1) { |
| 319 | setsyserr("can't get estimate for kerninfo"); |
| 320 | return (-1); |
| 321 | } |
| 322 | copysize = ret; |
| 323 | if ((kvmprocbase = (struct kinfo_proc *)malloc(copysize)) |
| 324 | == NULL) { |
| 325 | seterr("out of memory"); |
| 326 | return (-1); |
| 327 | } |
| 328 | if ((ret = getkerninfo(what, kvmprocbase, ©size, |
| 329 | arg)) == -1) { |
| 330 | setsyserr("can't get proc list"); |
| 331 | return (-1); |
| 332 | } |
| 333 | if (copysize % sizeof (struct kinfo_proc)) { |
| 334 | seterr("proc size mismatch (kinfo_proc: %d)", |
| 335 | sizeof (struct kinfo_proc)); |
| 336 | return (-1); |
| 337 | } |
| 338 | kvmnprocs = copysize / sizeof (struct kinfo_proc); |
| 339 | } else { |
| 340 | int nproc; |
| 341 | |
| 342 | if (kvm_read(nl[X_NPROC].n_value, &nproc, sizeof (int)) != |
| 343 | sizeof (int)) { |
| 344 | seterr("can't read nproc"); |
| 345 | return (-1); |
| 346 | } |
| 347 | if ((kvmprocbase = (struct kinfo_proc *) |
| 348 | malloc(nproc * sizeof (struct kinfo_proc))) == NULL) { |
| 349 | seterr("out of memory (addr: %x nproc = %d)", |
| 350 | nl[X_NPROC].n_value, nproc); |
| 351 | return (-1); |
| 352 | } |
| 353 | kvmnprocs = kvm_doprocs(what, arg, kvmprocbase); |
| 354 | realloc(kvmprocbase, kvmnprocs * sizeof (struct kinfo_proc)); |
| 355 | } |
| 356 | kvmprocptr = kvmprocbase; |
| 357 | |
| 358 | return (kvmnprocs); |
| 359 | } |
| 360 | |
| 361 | /* |
| 362 | * XXX - should NOT give up so easily - especially since the kernel |
| 363 | * may be corrupt (it died). Should gather as much information as possible. |
| 364 | * Follows proc ptrs instead of reading table since table may go |
| 365 | * away soon. |
| 366 | */ |
| 367 | static |
| 368 | kvm_doprocs(what, arg, buff) |
| 369 | int what, arg; |
| 370 | char *buff; |
| 371 | { |
| 372 | struct proc *p, proc; |
| 373 | register char *bp = buff; |
| 374 | int i = 0; |
| 375 | int doingzomb = 0; |
| 376 | struct eproc eproc; |
| 377 | struct pgrp pgrp; |
| 378 | struct session sess; |
| 379 | struct tty tty; |
| 380 | struct text text; |
| 381 | |
| 382 | /* allproc */ |
| 383 | if (kvm_read(nl[X_ALLPROC].n_value, &p, |
| 384 | sizeof (struct proc *)) != sizeof (struct proc *)) { |
| 385 | seterr("can't read allproc"); |
| 386 | return (-1); |
| 387 | } |
| 388 | |
| 389 | again: |
| 390 | for (; p; p = proc.p_nxt) { |
| 391 | if (kvm_read(p, &proc, sizeof (struct proc)) != |
| 392 | sizeof (struct proc)) { |
| 393 | seterr("can't read proc at %x", p); |
| 394 | return (-1); |
| 395 | } |
| 396 | switch(ki_op(what)) { |
| 397 | |
| 398 | case KINFO_PROC_PID: |
| 399 | if (proc.p_pid != (pid_t)arg) |
| 400 | continue; |
| 401 | break; |
| 402 | |
| 403 | |
| 404 | case KINFO_PROC_UID: |
| 405 | if (proc.p_uid != (uid_t)arg) |
| 406 | continue; |
| 407 | break; |
| 408 | |
| 409 | case KINFO_PROC_RUID: |
| 410 | if (proc.p_ruid != (uid_t)arg) |
| 411 | continue; |
| 412 | break; |
| 413 | } |
| 414 | /* |
| 415 | * gather eproc |
| 416 | */ |
| 417 | eproc.e_paddr = p; |
| 418 | if (kvm_read(proc.p_pgrp, &pgrp, sizeof (struct pgrp)) != |
| 419 | sizeof (struct pgrp)) { |
| 420 | seterr("can't read pgrp at %x", proc.p_pgrp); |
| 421 | return (-1); |
| 422 | } |
| 423 | eproc.e_sess = pgrp.pg_session; |
| 424 | eproc.e_pgid = pgrp.pg_id; |
| 425 | eproc.e_jobc = pgrp.pg_jobc; |
| 426 | if (kvm_read(pgrp.pg_session, &sess, sizeof (struct session)) |
| 427 | != sizeof (struct session)) { |
| 428 | seterr("can't read session at %x", pgrp.pg_session); |
| 429 | return (-1); |
| 430 | } |
| 431 | if ((proc.p_flag&SCTTY) && sess.s_ttyp != NULL) { |
| 432 | if (kvm_read(sess.s_ttyp, &tty, sizeof (struct tty)) |
| 433 | != sizeof (struct tty)) { |
| 434 | seterr("can't read tty at %x", sess.s_ttyp); |
| 435 | return (-1); |
| 436 | } |
| 437 | eproc.e_tdev = tty.t_dev; |
| 438 | eproc.e_tsess = tty.t_session; |
| 439 | if (tty.t_pgrp != NULL) { |
| 440 | if (kvm_read(tty.t_pgrp, &pgrp, sizeof (struct |
| 441 | pgrp)) != sizeof (struct pgrp)) { |
| 442 | seterr("can't read tpgrp at &x", |
| 443 | tty.t_pgrp); |
| 444 | return (-1); |
| 445 | } |
| 446 | eproc.e_tpgid = pgrp.pg_id; |
| 447 | } else |
| 448 | eproc.e_tpgid = -1; |
| 449 | } else |
| 450 | eproc.e_tdev = NODEV; |
| 451 | if (proc.p_wmesg) |
| 452 | kvm_read(proc.p_wmesg, eproc.e_wmesg, WMESGLEN); |
| 453 | if (proc.p_textp) { |
| 454 | kvm_read(proc.p_textp, &text, sizeof (text)); |
| 455 | eproc.e_xsize = text.x_size; |
| 456 | eproc.e_xrssize = text.x_rssize; |
| 457 | eproc.e_xccount = text.x_ccount; |
| 458 | eproc.e_xswrss = text.x_swrss; |
| 459 | } else { |
| 460 | eproc.e_xsize = eproc.e_xrssize = |
| 461 | eproc.e_xccount = eproc.e_xswrss = 0; |
| 462 | } |
| 463 | |
| 464 | switch(ki_op(what)) { |
| 465 | |
| 466 | case KINFO_PROC_PGRP: |
| 467 | if (eproc.e_pgid != (pid_t)arg) |
| 468 | continue; |
| 469 | break; |
| 470 | |
| 471 | case KINFO_PROC_TTY: |
| 472 | if ((proc.p_flag&SCTTY) == 0 || |
| 473 | eproc.e_tdev != (dev_t)arg) |
| 474 | continue; |
| 475 | break; |
| 476 | } |
| 477 | |
| 478 | i++; |
| 479 | bcopy(&proc, bp, sizeof (struct proc)); |
| 480 | bp += sizeof (struct proc); |
| 481 | bcopy(&eproc, bp, sizeof (struct eproc)); |
| 482 | bp+= sizeof (struct eproc); |
| 483 | } |
| 484 | if (!doingzomb) { |
| 485 | /* zombproc */ |
| 486 | if (kvm_read(nl[X_ZOMBPROC].n_value, &p, |
| 487 | sizeof (struct proc *)) != sizeof (struct proc *)) { |
| 488 | seterr("can't read zombproc"); |
| 489 | return (-1); |
| 490 | } |
| 491 | doingzomb = 1; |
| 492 | goto again; |
| 493 | } |
| 494 | |
| 495 | return (i); |
| 496 | } |
| 497 | |
| 498 | |
| 499 | struct proc * |
| 500 | kvm_nextproc() |
| 501 | { |
| 502 | |
| 503 | if (!kvmprocbase && kvm_getprocs(0, 0) == -1) |
| 504 | return (NULL); |
| 505 | if (kvmprocptr >= (kvmprocbase + kvmnprocs)) { |
| 506 | seterr("end of proc list"); |
| 507 | return (NULL); |
| 508 | } |
| 509 | return((struct proc *)(kvmprocptr++)); |
| 510 | } |
| 511 | |
| 512 | struct eproc * |
| 513 | kvm_geteproc(p) |
| 514 | struct proc *p; |
| 515 | { |
| 516 | return ((struct eproc *)(((char *)p) + sizeof (struct proc))); |
| 517 | } |
| 518 | |
| 519 | kvm_setproc() |
| 520 | { |
| 521 | |
| 522 | kvmprocptr = kvmprocbase; |
| 523 | } |
| 524 | |
| 525 | kvm_freeprocs() |
| 526 | { |
| 527 | |
| 528 | if (kvmprocbase) { |
| 529 | free(kvmprocbase); |
| 530 | kvmprocbase = NULL; |
| 531 | } |
| 532 | } |
| 533 | |
| 534 | struct user * |
| 535 | kvm_getu(p) |
| 536 | struct proc *p; |
| 537 | { |
| 538 | struct pte *pteaddr, apte; |
| 539 | struct pte arguutl[UPAGES+(CLSIZE*2)]; |
| 540 | register int i; |
| 541 | int ncl; |
| 542 | |
| 543 | if (kvminit == 0 && kvm_init(NULL, NULL, NULL, 0) == -1) |
| 544 | return (NULL); |
| 545 | if (p->p_stat == SZOMB) { |
| 546 | seterr("zombie process"); |
| 547 | return (NULL); |
| 548 | } |
| 549 | if ((p->p_flag & SLOAD) == 0) { |
| 550 | if (swap < 0) { |
| 551 | seterr("no swap"); |
| 552 | return (NULL); |
| 553 | } |
| 554 | (void) lseek(swap, (long)dtob(p->p_swaddr), 0); |
| 555 | if (read(swap, (char *)&user.user, sizeof (struct user)) != |
| 556 | sizeof (struct user)) { |
| 557 | seterr("can't read u for pid %d from %s\n", |
| 558 | p->p_pid, swapf); |
| 559 | return (NULL); |
| 560 | } |
| 561 | pcbpf = 0; |
| 562 | argaddr0 = 0; |
| 563 | argaddr1 = 0; |
| 564 | return (&user.user); |
| 565 | } |
| 566 | pteaddr = &Usrptmap[btokmx(p->p_p0br) + p->p_szpt - 1]; |
| 567 | klseek(kmem, (long)pteaddr, 0); |
| 568 | if (read(kmem, (char *)&apte, sizeof(apte)) != sizeof(apte)) { |
| 569 | seterr("can't read indir pte to get u for pid %d from %s", |
| 570 | p->p_pid, kmemf); |
| 571 | return (NULL); |
| 572 | } |
| 573 | lseek(mem, |
| 574 | (long)ctob(apte.pg_pfnum+1) - (UPAGES+(CLSIZE*2)) * sizeof (struct pte), |
| 575 | 0); |
| 576 | if (read(mem, (char *)arguutl, sizeof(arguutl)) != sizeof(arguutl)) { |
| 577 | seterr("can't read page table for u of pid %d from %s", |
| 578 | p->p_pid, memf); |
| 579 | return (NULL); |
| 580 | } |
| 581 | if (arguutl[0].pg_fod == 0 && arguutl[0].pg_pfnum) |
| 582 | argaddr0 = ctob(arguutl[0].pg_pfnum); |
| 583 | else |
| 584 | argaddr0 = 0; |
| 585 | if (arguutl[CLSIZE*1].pg_fod == 0 && arguutl[CLSIZE*1].pg_pfnum) |
| 586 | argaddr1 = ctob(arguutl[CLSIZE*1].pg_pfnum); |
| 587 | else |
| 588 | argaddr1 = 0; |
| 589 | pcbpf = arguutl[CLSIZE*2].pg_pfnum; |
| 590 | ncl = (sizeof (struct user) + NBPG*CLSIZE - 1) / (NBPG*CLSIZE); |
| 591 | while (--ncl >= 0) { |
| 592 | i = ncl * CLSIZE; |
| 593 | lseek(mem, (long)ctob(arguutl[(CLSIZE*2)+i].pg_pfnum), 0); |
| 594 | if (read(mem, user.upages[i], CLSIZE*NBPG) != CLSIZE*NBPG) { |
| 595 | seterr("can't read page %d of u of pid %d from %s", |
| 596 | arguutl[CLSIZE+i].pg_pfnum, p->p_pid, memf); |
| 597 | return(NULL); |
| 598 | } |
| 599 | } |
| 600 | return (&user.user); |
| 601 | } |
| 602 | |
| 603 | char * |
| 604 | kvm_getargs(p, up) |
| 605 | struct proc *p; |
| 606 | struct user *up; |
| 607 | { |
| 608 | char cmdbuf[CLSIZE*NBPG*2]; |
| 609 | union { |
| 610 | char argc[CLSIZE*NBPG*2]; |
| 611 | int argi[CLSIZE*NBPG*2/sizeof (int)]; |
| 612 | } argspac; |
| 613 | register char *cp; |
| 614 | register int *ip; |
| 615 | char c; |
| 616 | int nbad; |
| 617 | struct dblock db; |
| 618 | char *file; |
| 619 | |
| 620 | if (up == NULL || p->p_pid == 0 || p->p_pid == 2) |
| 621 | goto retucomm; |
| 622 | if ((p->p_flag & SLOAD) == 0 || argaddr1 == 0) { |
| 623 | if (swap < 0) |
| 624 | goto retucomm; |
| 625 | vstodb(0, CLSIZE, &up->u_smap, &db, 1); |
| 626 | (void) lseek(swap, (long)dtob(db.db_base), 0); |
| 627 | if (read(swap, (char *)&argspac.argc[NBPG*CLSIZE], |
| 628 | NBPG*CLSIZE) != NBPG*CLSIZE) |
| 629 | goto bad; |
| 630 | vstodb(1, CLSIZE, &up->u_smap, &db, 1); |
| 631 | (void) lseek(swap, (long)dtob(db.db_base), 0); |
| 632 | if (read(swap, (char *)&argspac.argc[0], |
| 633 | NBPG*CLSIZE) != NBPG*CLSIZE) |
| 634 | goto bad; |
| 635 | file = swapf; |
| 636 | } else { |
| 637 | if (argaddr0) { |
| 638 | lseek(mem, (long)argaddr0, 0); |
| 639 | if (read(mem, (char *)&argspac, NBPG*CLSIZE) |
| 640 | != NBPG*CLSIZE) |
| 641 | goto bad; |
| 642 | } else |
| 643 | bzero(&argspac, NBPG*CLSIZE); |
| 644 | lseek(mem, (long)argaddr1, 0); |
| 645 | if (read(mem, &argspac.argc[NBPG*CLSIZE], NBPG*CLSIZE) |
| 646 | != NBPG*CLSIZE) |
| 647 | goto bad; |
| 648 | file = memf; |
| 649 | } |
| 650 | ip = &argspac.argi[CLSIZE*NBPG*2/sizeof (int)]; |
| 651 | ip -= 2; /* last arg word and .long 0 */ |
| 652 | while (*--ip) { |
| 653 | if (ip == argspac.argi) |
| 654 | goto retucomm; |
| 655 | } |
| 656 | *(char *)ip = ' '; |
| 657 | ip++; |
| 658 | nbad = 0; |
| 659 | for (cp = (char *)ip; cp < &argspac.argc[CLSIZE*NBPG*2]; cp++) { |
| 660 | c = *cp & 0177; |
| 661 | if (c == 0) |
| 662 | *cp = ' '; |
| 663 | else if (c < ' ' || c > 0176) { |
| 664 | if (++nbad >= 5*(0+1)) { /* eflg -> 0 XXX */ |
| 665 | *cp++ = ' '; |
| 666 | break; |
| 667 | } |
| 668 | *cp = '?'; |
| 669 | } else if (0 == 0 && c == '=') { /* eflg -> 0 XXX */ |
| 670 | while (*--cp != ' ') |
| 671 | if (cp <= (char *)ip) |
| 672 | break; |
| 673 | break; |
| 674 | } |
| 675 | } |
| 676 | *cp = 0; |
| 677 | while (*--cp == ' ') |
| 678 | *cp = 0; |
| 679 | cp = (char *)ip; |
| 680 | (void) strncpy(cmdbuf, cp, &argspac.argc[CLSIZE*NBPG*2] - cp); |
| 681 | if (cp[0] == '-' || cp[0] == '?' || cp[0] <= ' ') { |
| 682 | (void) strcat(cmdbuf, " ("); |
| 683 | (void) strncat(cmdbuf, p->p_comm, sizeof(p->p_comm)); |
| 684 | (void) strcat(cmdbuf, ")"); |
| 685 | } |
| 686 | return (cmdbuf); |
| 687 | |
| 688 | bad: |
| 689 | seterr("error locating command name for pid %d from %s\n", |
| 690 | p->p_pid, file); |
| 691 | retucomm: |
| 692 | (void) strcpy(cmdbuf, " ("); |
| 693 | (void) strncat(cmdbuf, p->p_comm, sizeof (p->p_comm)); |
| 694 | (void) strcat(cmdbuf, ")"); |
| 695 | return (cmdbuf); |
| 696 | } |
| 697 | |
| 698 | |
| 699 | static |
| 700 | getkvars() |
| 701 | { |
| 702 | |
| 703 | if (kvm_nlist(nl) == -1) |
| 704 | return (-1); |
| 705 | if (deadkernel) { |
| 706 | /* We must do the sys map first because klseek uses it */ |
| 707 | long addr; |
| 708 | |
| 709 | Syssize = nl[X_SYSSIZE].n_value; |
| 710 | Sysmap = (struct pte *) |
| 711 | calloc((unsigned) Syssize, sizeof (struct pte)); |
| 712 | if (Sysmap == NULL) { |
| 713 | seterr("out of space for Sysmap"); |
| 714 | return (-1); |
| 715 | } |
| 716 | addr = (long) nl[X_SYSMAP].n_value; |
| 717 | addr &= ~KERNBASE; |
| 718 | (void) lseek(kmem, addr, 0); |
| 719 | if (read(kmem, (char *) Sysmap, Syssize * sizeof (struct pte)) |
| 720 | != Syssize * sizeof (struct pte)) { |
| 721 | seterr("can't read Sysmap"); |
| 722 | return (-1); |
| 723 | } |
| 724 | } |
| 725 | usrpt = (struct pte *)nl[X_USRPT].n_value; |
| 726 | Usrptmap = (struct pte *)nl[X_USRPTMAP].n_value; |
| 727 | if (kvm_read((long)nl[X_NSWAP].n_value, &nswap, sizeof (long)) != |
| 728 | sizeof (long)) { |
| 729 | seterr("can't read nswap"); |
| 730 | return (-1); |
| 731 | } |
| 732 | if (kvm_read((long)nl[X_DMMIN].n_value, &dmmin, sizeof (long)) != |
| 733 | sizeof (long)) { |
| 734 | seterr("can't read dmmin"); |
| 735 | return (-1); |
| 736 | } |
| 737 | if (kvm_read((long)nl[X_DMMAX].n_value, &dmmax, sizeof (long)) != |
| 738 | sizeof (long)) { |
| 739 | seterr("can't read dmmax"); |
| 740 | return (-1); |
| 741 | } |
| 742 | return (0); |
| 743 | } |
| 744 | |
| 745 | kvm_read(loc, buf, len) |
| 746 | unsigned long loc; |
| 747 | char *buf; |
| 748 | { |
| 749 | if (kvmfilesopen == 0 && kvm_openfiles(NULL, NULL, NULL) == -1) |
| 750 | return (-1); |
| 751 | if (loc & KERNBASE) { |
| 752 | klseek(kmem, loc, 0); |
| 753 | if (read(kmem, buf, len) != len) { |
| 754 | seterr("error reading kmem at %x\n", loc); |
| 755 | return (-1); |
| 756 | } |
| 757 | } else { |
| 758 | lseek(mem, loc, 0); |
| 759 | if (read(mem, buf, len) != len) { |
| 760 | seterr("error reading mem at %x\n", loc); |
| 761 | return (-1); |
| 762 | } |
| 763 | } |
| 764 | return (len); |
| 765 | } |
| 766 | |
| 767 | static |
| 768 | klseek(fd, loc, off) |
| 769 | int fd; |
| 770 | off_t loc; |
| 771 | int off; |
| 772 | { |
| 773 | |
| 774 | if (deadkernel) { |
| 775 | off_t vtophys(); |
| 776 | |
| 777 | if ((loc = vtophys(loc)) == -1) |
| 778 | return; |
| 779 | } |
| 780 | (void) lseek(fd, (off_t)loc, off); |
| 781 | } |
| 782 | |
| 783 | /* |
| 784 | * Given a base/size pair in virtual swap area, |
| 785 | * return a physical base/size pair which is the |
| 786 | * (largest) initial, physically contiguous block. |
| 787 | */ |
| 788 | static |
| 789 | vstodb(vsbase, vssize, dmp, dbp, rev) |
| 790 | register int vsbase; |
| 791 | int vssize; |
| 792 | struct dmap *dmp; |
| 793 | register struct dblock *dbp; |
| 794 | { |
| 795 | register int blk = dmmin; |
| 796 | register swblk_t *ip = dmp->dm_map; |
| 797 | |
| 798 | vsbase = ctod(vsbase); |
| 799 | vssize = ctod(vssize); |
| 800 | if (vsbase < 0 || vsbase + vssize > dmp->dm_size) |
| 801 | /*panic("vstodb")*/; |
| 802 | while (vsbase >= blk) { |
| 803 | vsbase -= blk; |
| 804 | if (blk < dmmax) |
| 805 | blk *= 2; |
| 806 | ip++; |
| 807 | } |
| 808 | if (*ip <= 0 || *ip + blk > nswap) |
| 809 | /*panic("vstodb")*/; |
| 810 | dbp->db_size = MIN(vssize, blk - vsbase); |
| 811 | dbp->db_base = *ip + (rev ? blk - (vsbase + dbp->db_size) : vsbase); |
| 812 | } |
| 813 | |
| 814 | /* |
| 815 | * This routine was stolen from adb to simulate memory management |
| 816 | * on the VAX. |
| 817 | */ |
| 818 | static off_t |
| 819 | vtophys(loc) |
| 820 | long loc; |
| 821 | { |
| 822 | register p; |
| 823 | off_t newloc; |
| 824 | |
| 825 | newloc = loc & ~KERNBASE; |
| 826 | p = btop(newloc); |
| 827 | if ((loc & KERNBASE) == 0) { |
| 828 | seterr("vtophys: translating non-kernel address"); |
| 829 | return((off_t) -1); |
| 830 | } |
| 831 | if (p >= Syssize) { |
| 832 | seterr("vtophys: page out of bound (%d>=%d)", p, Syssize); |
| 833 | return((off_t) -1); |
| 834 | } |
| 835 | if (Sysmap[p].pg_v == 0 && |
| 836 | (Sysmap[p].pg_fod || Sysmap[p].pg_pfnum == 0)) { |
| 837 | seterr("vtophys: page not valid"); |
| 838 | return((off_t) -1); |
| 839 | } |
| 840 | loc = (long) (ptob(Sysmap[p].pg_pfnum) + (loc & PGOFSET)); |
| 841 | return(loc); |
| 842 | } |
| 843 | |
| 844 | #include <varargs.h> |
| 845 | static char errbuf[LINE_MAX]; |
| 846 | |
| 847 | static |
| 848 | seterr(va_alist) |
| 849 | va_dcl |
| 850 | { |
| 851 | char *fmt; |
| 852 | va_list ap; |
| 853 | |
| 854 | va_start(ap); |
| 855 | fmt = va_arg(ap, char *); |
| 856 | (void) vsprintf(errbuf, fmt, ap); |
| 857 | va_end(ap); |
| 858 | } |
| 859 | |
| 860 | static |
| 861 | setsyserr(va_alist) |
| 862 | va_dcl |
| 863 | { |
| 864 | char *fmt, *cp; |
| 865 | va_list ap; |
| 866 | extern errno; |
| 867 | |
| 868 | va_start(ap); |
| 869 | fmt = va_arg(ap, char *); |
| 870 | (void) vsprintf(errbuf, fmt, ap); |
| 871 | for (cp=errbuf; *cp; cp++) |
| 872 | ; |
| 873 | sprintf(cp, ": %s", strerror(errno)); |
| 874 | va_end(ap); |
| 875 | } |
| 876 | |
| 877 | char * |
| 878 | kvm_geterr() |
| 879 | { |
| 880 | |
| 881 | return (errbuf); |
| 882 | } |