1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2017 Dell EMC 5 * Copyright (c) 2007 Sandvine Incorporated 6 * Copyright (c) 1998 John D. Polstra 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31 #include <sys/cdefs.h> 32 __FBSDID("$FreeBSD$"); 33 34 #include <sys/endian.h> 35 #include <sys/param.h> 36 #include <sys/procfs.h> 37 #include <sys/ptrace.h> 38 #include <sys/queue.h> 39 #include <sys/linker_set.h> 40 #include <sys/sbuf.h> 41 #include <sys/sysctl.h> 42 #include <sys/user.h> 43 #include <sys/wait.h> 44 #include <machine/elf.h> 45 #include <vm/vm_param.h> 46 #include <vm/vm.h> 47 #include <assert.h> 48 #include <err.h> 49 #include <errno.h> 50 #include <fcntl.h> 51 #include <stdbool.h> 52 #include <stdint.h> 53 #include <stdio.h> 54 #include <stdlib.h> 55 #include <string.h> 56 #include <unistd.h> 57 #include <libutil.h> 58 59 #include "extern.h" 60 61 /* 62 * Code for generating ELF core dumps. 63 */ 64 65 struct map_entry { 66 struct map_entry *next; 67 vm_offset_t start; 68 vm_offset_t end; 69 vm_prot_t protection; 70 }; 71 72 typedef void (*segment_callback)(struct map_entry *, void *); 73 74 /* Closure for cb_put_phdr(). */ 75 struct phdr_closure { 76 Elf_Phdr *phdr; /* Program header to fill in */ 77 Elf_Off offset; /* Offset of segment in core file */ 78 }; 79 80 /* Closure for cb_size_segment(). */ 81 struct sseg_closure { 82 int count; /* Count of writable segments. */ 83 size_t size; /* Total size of all writable segments. */ 84 }; 85 86 #ifdef ELFCORE_COMPAT_32 87 typedef struct fpreg32 elfcore_fpregset_t; 88 typedef struct reg32 elfcore_gregset_t; 89 typedef struct prpsinfo32 elfcore_prpsinfo_t; 90 typedef struct prstatus32 elfcore_prstatus_t; 91 typedef struct ptrace_lwpinfo32 elfcore_lwpinfo_t; 92 static void elf_convert_lwpinfo(struct ptrace_lwpinfo32 *pld, 93 struct ptrace_lwpinfo *pls); 94 #else 95 typedef fpregset_t elfcore_fpregset_t; 96 typedef gregset_t elfcore_gregset_t; 97 typedef prpsinfo_t elfcore_prpsinfo_t; 98 typedef prstatus_t elfcore_prstatus_t; 99 typedef struct ptrace_lwpinfo elfcore_lwpinfo_t; 100 #define elf_convert_lwpinfo(d,s) *d = *s 101 #endif 102 103 typedef void* (*notefunc_t)(void *, size_t *); 104 105 static void cb_put_phdr(struct map_entry *, void *); 106 static void cb_size_segment(struct map_entry *, void *); 107 static void each_dumpable_segment(struct map_entry *, segment_callback, 108 void *closure); 109 static void elf_detach(void); /* atexit() handler. */ 110 static void *elf_note_prpsinfo(void *, size_t *); 111 static void *elf_note_thrmisc(void *, size_t *); 112 static void *elf_note_ptlwpinfo(void *, size_t *); 113 #if defined(__i386__) || defined(__amd64__) 114 static void *elf_note_x86_xstate(void *, size_t *); 115 #endif 116 #if defined(__powerpc__) 117 static void *elf_note_powerpc_vmx(void *, size_t *); 118 static void *elf_note_powerpc_vsx(void *, size_t *); 119 #endif 120 static void *elf_note_procstat_auxv(void *, size_t *); 121 static void *elf_note_procstat_files(void *, size_t *); 122 static void *elf_note_procstat_groups(void *, size_t *); 123 static void *elf_note_procstat_osrel(void *, size_t *); 124 static void *elf_note_procstat_proc(void *, size_t *); 125 static void *elf_note_procstat_psstrings(void *, size_t *); 126 static void *elf_note_procstat_rlimit(void *, size_t *); 127 static void *elf_note_procstat_umask(void *, size_t *); 128 static void *elf_note_procstat_vmmap(void *, size_t *); 129 static void elf_puthdr(int, pid_t, struct map_entry *, void *, size_t, size_t, 130 size_t, int); 131 static void elf_putnote(int, notefunc_t, void *, struct sbuf *); 132 static void elf_putnotes(pid_t, struct sbuf *, size_t *); 133 static void elf_putregnote(int, lwpid_t, struct sbuf *); 134 static void freemap(struct map_entry *); 135 static struct map_entry *readmap(pid_t); 136 static void *procstat_sysctl(void *, int, size_t, size_t *sizep); 137 138 static pid_t g_pid; /* Pid being dumped, global for elf_detach */ 139 static int g_status; /* proc status after ptrace attach */ 140 141 static int 142 elf_ident(int efd, pid_t pid __unused, char *binfile __unused) 143 { 144 Elf_Ehdr hdr; 145 int cnt; 146 uint16_t machine; 147 148 cnt = read(efd, &hdr, sizeof(hdr)); 149 if (cnt != sizeof(hdr)) 150 return (0); 151 if (!IS_ELF(hdr)) 152 return (0); 153 switch (hdr.e_ident[EI_DATA]) { 154 case ELFDATA2LSB: 155 machine = le16toh(hdr.e_machine); 156 break; 157 case ELFDATA2MSB: 158 machine = be16toh(hdr.e_machine); 159 break; 160 default: 161 return (0); 162 } 163 if (!ELF_MACHINE_OK(machine)) 164 return (0); 165 166 /* Looks good. */ 167 return (1); 168 } 169 170 static void 171 elf_detach(void) 172 { 173 int sig; 174 175 if (g_pid != 0) { 176 /* 177 * Forward any pending signals. SIGSTOP is generated by ptrace 178 * itself, so ignore it. 179 */ 180 sig = WIFSTOPPED(g_status) ? WSTOPSIG(g_status) : 0; 181 if (sig == SIGSTOP) 182 sig = 0; 183 ptrace(PT_DETACH, g_pid, (caddr_t)1, sig); 184 } 185 } 186 187 /* 188 * Write an ELF coredump for the given pid to the given fd. 189 */ 190 static void 191 elf_coredump(int efd, int fd, pid_t pid) 192 { 193 struct map_entry *map; 194 struct sseg_closure seginfo; 195 struct sbuf *sb; 196 void *hdr; 197 size_t hdrsize, notesz, segoff; 198 ssize_t n, old_len; 199 Elf_Phdr *php; 200 int i; 201 202 /* Attach to process to dump. */ 203 g_pid = pid; 204 if (atexit(elf_detach) != 0) 205 err(1, "atexit"); 206 errno = 0; 207 ptrace(PT_ATTACH, pid, NULL, 0); 208 if (errno) 209 err(1, "PT_ATTACH"); 210 if (waitpid(pid, &g_status, 0) == -1) 211 err(1, "waitpid"); 212 213 /* Get the program's memory map. */ 214 map = readmap(pid); 215 216 /* Size the program segments. */ 217 seginfo.count = 0; 218 seginfo.size = 0; 219 each_dumpable_segment(map, cb_size_segment, &seginfo); 220 221 /* 222 * Build the header and the notes using sbuf and write to the file. 223 */ 224 sb = sbuf_new_auto(); 225 hdrsize = sizeof(Elf_Ehdr) + sizeof(Elf_Phdr) * (1 + seginfo.count); 226 if (seginfo.count + 1 >= PN_XNUM) 227 hdrsize += sizeof(Elf_Shdr); 228 /* Start header + notes section. */ 229 sbuf_start_section(sb, NULL); 230 /* Make empty header subsection. */ 231 sbuf_start_section(sb, &old_len); 232 sbuf_putc(sb, 0); 233 sbuf_end_section(sb, old_len, hdrsize, 0); 234 /* Put notes. */ 235 elf_putnotes(pid, sb, ¬esz); 236 /* Align up to a page boundary for the program segments. */ 237 sbuf_end_section(sb, -1, PAGE_SIZE, 0); 238 if (sbuf_finish(sb) != 0) 239 err(1, "sbuf_finish"); 240 hdr = sbuf_data(sb); 241 segoff = sbuf_len(sb); 242 /* Fill in the header. */ 243 elf_puthdr(efd, pid, map, hdr, hdrsize, notesz, segoff, seginfo.count); 244 245 n = write(fd, hdr, segoff); 246 if (n == -1) 247 err(1, "write"); 248 if (n < segoff) 249 errx(1, "short write"); 250 251 /* Write the contents of all of the writable segments. */ 252 php = (Elf_Phdr *)((char *)hdr + sizeof(Elf_Ehdr)) + 1; 253 for (i = 0; i < seginfo.count; i++) { 254 struct ptrace_io_desc iorequest; 255 uintmax_t nleft = php->p_filesz; 256 257 iorequest.piod_op = PIOD_READ_D; 258 iorequest.piod_offs = (caddr_t)(uintptr_t)php->p_vaddr; 259 while (nleft > 0) { 260 char buf[8*1024]; 261 size_t nwant; 262 ssize_t ngot; 263 264 if (nleft > sizeof(buf)) 265 nwant = sizeof buf; 266 else 267 nwant = nleft; 268 iorequest.piod_addr = buf; 269 iorequest.piod_len = nwant; 270 ptrace(PT_IO, pid, (caddr_t)&iorequest, 0); 271 ngot = iorequest.piod_len; 272 if ((size_t)ngot < nwant) 273 errx(1, "short read wanted %zu, got %zd", 274 nwant, ngot); 275 ngot = write(fd, buf, nwant); 276 if (ngot == -1) 277 err(1, "write of segment %d failed", i); 278 if ((size_t)ngot != nwant) 279 errx(1, "short write"); 280 nleft -= nwant; 281 iorequest.piod_offs += ngot; 282 } 283 php++; 284 } 285 sbuf_delete(sb); 286 freemap(map); 287 } 288 289 /* 290 * A callback for each_dumpable_segment() to write out the segment's 291 * program header entry. 292 */ 293 static void 294 cb_put_phdr(struct map_entry *entry, void *closure) 295 { 296 struct phdr_closure *phc = (struct phdr_closure *)closure; 297 Elf_Phdr *phdr = phc->phdr; 298 299 phc->offset = round_page(phc->offset); 300 301 phdr->p_type = PT_LOAD; 302 phdr->p_offset = phc->offset; 303 phdr->p_vaddr = entry->start; 304 phdr->p_paddr = 0; 305 phdr->p_filesz = phdr->p_memsz = entry->end - entry->start; 306 phdr->p_align = PAGE_SIZE; 307 phdr->p_flags = 0; 308 if (entry->protection & VM_PROT_READ) 309 phdr->p_flags |= PF_R; 310 if (entry->protection & VM_PROT_WRITE) 311 phdr->p_flags |= PF_W; 312 if (entry->protection & VM_PROT_EXECUTE) 313 phdr->p_flags |= PF_X; 314 315 phc->offset += phdr->p_filesz; 316 phc->phdr++; 317 } 318 319 /* 320 * A callback for each_dumpable_segment() to gather information about 321 * the number of segments and their total size. 322 */ 323 static void 324 cb_size_segment(struct map_entry *entry, void *closure) 325 { 326 struct sseg_closure *ssc = (struct sseg_closure *)closure; 327 328 ssc->count++; 329 ssc->size += entry->end - entry->start; 330 } 331 332 /* 333 * For each segment in the given memory map, call the given function 334 * with a pointer to the map entry and some arbitrary caller-supplied 335 * data. 336 */ 337 static void 338 each_dumpable_segment(struct map_entry *map, segment_callback func, 339 void *closure) 340 { 341 struct map_entry *entry; 342 343 for (entry = map; entry != NULL; entry = entry->next) 344 (*func)(entry, closure); 345 } 346 347 static void 348 elf_putnotes(pid_t pid, struct sbuf *sb, size_t *sizep) 349 { 350 lwpid_t *tids; 351 size_t threads, old_len; 352 ssize_t size; 353 int i; 354 355 errno = 0; 356 threads = ptrace(PT_GETNUMLWPS, pid, NULL, 0); 357 if (errno) 358 err(1, "PT_GETNUMLWPS"); 359 tids = malloc(threads * sizeof(*tids)); 360 if (tids == NULL) 361 errx(1, "out of memory"); 362 errno = 0; 363 ptrace(PT_GETLWPLIST, pid, (void *)tids, threads); 364 if (errno) 365 err(1, "PT_GETLWPLIST"); 366 367 sbuf_start_section(sb, &old_len); 368 elf_putnote(NT_PRPSINFO, elf_note_prpsinfo, &pid, sb); 369 370 for (i = 0; i < threads; ++i) { 371 elf_putregnote(NT_PRSTATUS, tids[i], sb); 372 elf_putregnote(NT_FPREGSET, tids[i], sb); 373 elf_putnote(NT_THRMISC, elf_note_thrmisc, tids + i, sb); 374 elf_putnote(NT_PTLWPINFO, elf_note_ptlwpinfo, tids + i, sb); 375 #if defined(__aarch64__) || defined(__arm__) 376 elf_putregnote(NT_ARM_TLS, tids[i], sb); 377 #endif 378 #if (defined(ELFCORE_COMPAT_32) && defined(__aarch64__)) || defined(__arm__) 379 elf_putregnote(NT_ARM_VFP, tids[i], sb); 380 #endif 381 #if defined(__i386__) || defined(__amd64__) 382 elf_putregnote(NT_X86_SEGBASES, tids[i], sb); 383 elf_putnote(NT_X86_XSTATE, elf_note_x86_xstate, tids + i, sb); 384 #endif 385 #if defined(__powerpc__) 386 elf_putnote(NT_PPC_VMX, elf_note_powerpc_vmx, tids + i, sb); 387 #ifndef __SPE__ 388 elf_putnote(NT_PPC_VSX, elf_note_powerpc_vsx, tids + i, sb); 389 #endif 390 #endif 391 } 392 393 #ifndef ELFCORE_COMPAT_32 394 elf_putnote(NT_PROCSTAT_PROC, elf_note_procstat_proc, &pid, sb); 395 elf_putnote(NT_PROCSTAT_FILES, elf_note_procstat_files, &pid, sb); 396 elf_putnote(NT_PROCSTAT_VMMAP, elf_note_procstat_vmmap, &pid, sb); 397 elf_putnote(NT_PROCSTAT_GROUPS, elf_note_procstat_groups, &pid, sb); 398 elf_putnote(NT_PROCSTAT_UMASK, elf_note_procstat_umask, &pid, sb); 399 elf_putnote(NT_PROCSTAT_RLIMIT, elf_note_procstat_rlimit, &pid, sb); 400 elf_putnote(NT_PROCSTAT_OSREL, elf_note_procstat_osrel, &pid, sb); 401 elf_putnote(NT_PROCSTAT_PSSTRINGS, elf_note_procstat_psstrings, &pid, 402 sb); 403 elf_putnote(NT_PROCSTAT_AUXV, elf_note_procstat_auxv, &pid, sb); 404 #endif 405 406 size = sbuf_end_section(sb, old_len, 1, 0); 407 if (size == -1) 408 err(1, "sbuf_end_section"); 409 free(tids); 410 *sizep = size; 411 } 412 413 /* 414 * Emit one register set note section to sbuf. 415 */ 416 static void 417 elf_putregnote(int type, lwpid_t tid, struct sbuf *sb) 418 { 419 Elf_Note note; 420 struct iovec iov; 421 ssize_t old_len; 422 423 iov.iov_base = NULL; 424 iov.iov_len = 0; 425 if (ptrace(PT_GETREGSET, tid, (void *)&iov, type) != 0) 426 return; 427 iov.iov_base = calloc(1, iov.iov_len); 428 if (iov.iov_base == NULL) 429 errx(1, "out of memory"); 430 if (ptrace(PT_GETREGSET, tid, (void *)&iov, type) != 0) 431 errx(1, "failed to fetch register set %d", type); 432 433 note.n_namesz = 8; /* strlen("FreeBSD") + 1 */ 434 note.n_descsz = iov.iov_len; 435 note.n_type = type; 436 437 sbuf_bcat(sb, ¬e, sizeof(note)); 438 sbuf_start_section(sb, &old_len); 439 sbuf_bcat(sb, "FreeBSD", note.n_namesz); 440 sbuf_end_section(sb, old_len, sizeof(Elf32_Size), 0); 441 sbuf_start_section(sb, &old_len); 442 sbuf_bcat(sb, iov.iov_base, iov.iov_len); 443 sbuf_end_section(sb, old_len, sizeof(Elf32_Size), 0); 444 free(iov.iov_base); 445 } 446 447 /* 448 * Emit one note section to sbuf. 449 */ 450 static void 451 elf_putnote(int type, notefunc_t notefunc, void *arg, struct sbuf *sb) 452 { 453 Elf_Note note; 454 size_t descsz; 455 ssize_t old_len; 456 void *desc; 457 458 desc = notefunc(arg, &descsz); 459 note.n_namesz = 8; /* strlen("FreeBSD") + 1 */ 460 note.n_descsz = descsz; 461 note.n_type = type; 462 463 sbuf_bcat(sb, ¬e, sizeof(note)); 464 sbuf_start_section(sb, &old_len); 465 sbuf_bcat(sb, "FreeBSD", note.n_namesz); 466 sbuf_end_section(sb, old_len, sizeof(Elf32_Size), 0); 467 if (descsz == 0) 468 return; 469 sbuf_start_section(sb, &old_len); 470 sbuf_bcat(sb, desc, descsz); 471 sbuf_end_section(sb, old_len, sizeof(Elf32_Size), 0); 472 free(desc); 473 } 474 475 /* 476 * Generate the ELF coredump header. 477 */ 478 static void 479 elf_puthdr(int efd, pid_t pid, struct map_entry *map, void *hdr, size_t hdrsize, 480 size_t notesz, size_t segoff, int numsegs) 481 { 482 Elf_Ehdr *ehdr, binhdr; 483 Elf_Phdr *phdr; 484 Elf_Shdr *shdr; 485 struct phdr_closure phc; 486 ssize_t cnt; 487 488 cnt = read(efd, &binhdr, sizeof(binhdr)); 489 if (cnt < 0) 490 err(1, "Failed to re-read ELF header"); 491 else if (cnt != sizeof(binhdr)) 492 errx(1, "Failed to re-read ELF header"); 493 494 ehdr = (Elf_Ehdr *)hdr; 495 496 ehdr->e_ident[EI_MAG0] = ELFMAG0; 497 ehdr->e_ident[EI_MAG1] = ELFMAG1; 498 ehdr->e_ident[EI_MAG2] = ELFMAG2; 499 ehdr->e_ident[EI_MAG3] = ELFMAG3; 500 ehdr->e_ident[EI_CLASS] = ELF_CLASS; 501 ehdr->e_ident[EI_DATA] = ELF_DATA; 502 ehdr->e_ident[EI_VERSION] = EV_CURRENT; 503 ehdr->e_ident[EI_OSABI] = ELFOSABI_FREEBSD; 504 ehdr->e_ident[EI_ABIVERSION] = 0; 505 ehdr->e_ident[EI_PAD] = 0; 506 ehdr->e_type = ET_CORE; 507 ehdr->e_machine = binhdr.e_machine; 508 ehdr->e_version = EV_CURRENT; 509 ehdr->e_entry = 0; 510 ehdr->e_phoff = sizeof(Elf_Ehdr); 511 ehdr->e_flags = binhdr.e_flags; 512 ehdr->e_ehsize = sizeof(Elf_Ehdr); 513 ehdr->e_phentsize = sizeof(Elf_Phdr); 514 ehdr->e_shentsize = sizeof(Elf_Shdr); 515 ehdr->e_shstrndx = SHN_UNDEF; 516 if (numsegs + 1 < PN_XNUM) { 517 ehdr->e_phnum = numsegs + 1; 518 ehdr->e_shnum = 0; 519 } else { 520 ehdr->e_phnum = PN_XNUM; 521 ehdr->e_shnum = 1; 522 523 ehdr->e_shoff = ehdr->e_phoff + 524 (numsegs + 1) * ehdr->e_phentsize; 525 526 shdr = (Elf_Shdr *)((char *)hdr + ehdr->e_shoff); 527 memset(shdr, 0, sizeof(*shdr)); 528 /* 529 * A special first section is used to hold large segment and 530 * section counts. This was proposed by Sun Microsystems in 531 * Solaris and has been adopted by Linux; the standard ELF 532 * tools are already familiar with the technique. 533 * 534 * See table 7-7 of the Solaris "Linker and Libraries Guide" 535 * (or 12-7 depending on the version of the document) for more 536 * details. 537 */ 538 shdr->sh_type = SHT_NULL; 539 shdr->sh_size = ehdr->e_shnum; 540 shdr->sh_link = ehdr->e_shstrndx; 541 shdr->sh_info = numsegs + 1; 542 } 543 544 /* 545 * Fill in the program header entries. 546 */ 547 phdr = (Elf_Phdr *)((char *)hdr + ehdr->e_phoff); 548 549 /* The note segment. */ 550 phdr->p_type = PT_NOTE; 551 phdr->p_offset = hdrsize; 552 phdr->p_vaddr = 0; 553 phdr->p_paddr = 0; 554 phdr->p_filesz = notesz; 555 phdr->p_memsz = 0; 556 phdr->p_flags = PF_R; 557 phdr->p_align = sizeof(Elf32_Size); 558 phdr++; 559 560 /* All the writable segments from the program. */ 561 phc.phdr = phdr; 562 phc.offset = segoff; 563 each_dumpable_segment(map, cb_put_phdr, &phc); 564 } 565 566 /* 567 * Free the memory map. 568 */ 569 static void 570 freemap(struct map_entry *map) 571 { 572 struct map_entry *next; 573 574 while (map != NULL) { 575 next = map->next; 576 free(map); 577 map = next; 578 } 579 } 580 581 /* 582 * Read the process's memory map using kinfo_getvmmap(), and return a list of 583 * VM map entries. Only the non-device read/writable segments are 584 * returned. The map entries in the list aren't fully filled in; only 585 * the items we need are present. 586 */ 587 static struct map_entry * 588 readmap(pid_t pid) 589 { 590 struct map_entry *ent, **linkp, *map; 591 struct kinfo_vmentry *vmentl, *kve; 592 int i, nitems; 593 594 vmentl = kinfo_getvmmap(pid, &nitems); 595 if (vmentl == NULL) 596 err(1, "cannot retrieve mappings for %u process", pid); 597 598 map = NULL; 599 linkp = ↦ 600 for (i = 0; i < nitems; i++) { 601 kve = &vmentl[i]; 602 603 /* 604 * Ignore 'malformed' segments or ones representing memory 605 * mapping with MAP_NOCORE on. 606 * If the 'full' support is disabled, just dump the most 607 * meaningful data segments. 608 */ 609 if ((kve->kve_protection & KVME_PROT_READ) == 0 || 610 (kve->kve_flags & KVME_FLAG_NOCOREDUMP) != 0 || 611 kve->kve_type == KVME_TYPE_DEAD || 612 kve->kve_type == KVME_TYPE_UNKNOWN || 613 ((pflags & PFLAGS_FULL) == 0 && 614 kve->kve_type != KVME_TYPE_DEFAULT && 615 kve->kve_type != KVME_TYPE_VNODE && 616 kve->kve_type != KVME_TYPE_SWAP && 617 kve->kve_type != KVME_TYPE_PHYS)) 618 continue; 619 620 ent = calloc(1, sizeof(*ent)); 621 if (ent == NULL) 622 errx(1, "out of memory"); 623 ent->start = (vm_offset_t)kve->kve_start; 624 ent->end = (vm_offset_t)kve->kve_end; 625 ent->protection = VM_PROT_READ | VM_PROT_WRITE; 626 if ((kve->kve_protection & KVME_PROT_EXEC) != 0) 627 ent->protection |= VM_PROT_EXECUTE; 628 629 *linkp = ent; 630 linkp = &ent->next; 631 } 632 free(vmentl); 633 return (map); 634 } 635 636 /* 637 * Miscellaneous note out functions. 638 */ 639 640 static void * 641 elf_note_prpsinfo(void *arg, size_t *sizep) 642 { 643 char *cp, *end; 644 pid_t pid; 645 elfcore_prpsinfo_t *psinfo; 646 struct kinfo_proc kip; 647 size_t len; 648 int name[4]; 649 650 pid = *(pid_t *)arg; 651 psinfo = calloc(1, sizeof(*psinfo)); 652 if (psinfo == NULL) 653 errx(1, "out of memory"); 654 psinfo->pr_version = PRPSINFO_VERSION; 655 psinfo->pr_psinfosz = sizeof(*psinfo); 656 657 name[0] = CTL_KERN; 658 name[1] = KERN_PROC; 659 name[2] = KERN_PROC_PID; 660 name[3] = pid; 661 len = sizeof(kip); 662 if (sysctl(name, 4, &kip, &len, NULL, 0) == -1) 663 err(1, "kern.proc.pid.%u", pid); 664 if (kip.ki_pid != pid) 665 err(1, "kern.proc.pid.%u", pid); 666 strlcpy(psinfo->pr_fname, kip.ki_comm, sizeof(psinfo->pr_fname)); 667 name[2] = KERN_PROC_ARGS; 668 len = sizeof(psinfo->pr_psargs) - 1; 669 if (sysctl(name, 4, psinfo->pr_psargs, &len, NULL, 0) == 0 && len > 0) { 670 cp = psinfo->pr_psargs; 671 end = cp + len - 1; 672 for (;;) { 673 cp = memchr(cp, '\0', end - cp); 674 if (cp == NULL) 675 break; 676 *cp = ' '; 677 } 678 } else 679 strlcpy(psinfo->pr_psargs, kip.ki_comm, 680 sizeof(psinfo->pr_psargs)); 681 psinfo->pr_pid = pid; 682 683 *sizep = sizeof(*psinfo); 684 return (psinfo); 685 } 686 687 static void * 688 elf_note_thrmisc(void *arg, size_t *sizep) 689 { 690 lwpid_t tid; 691 struct ptrace_lwpinfo lwpinfo; 692 thrmisc_t *thrmisc; 693 694 tid = *(lwpid_t *)arg; 695 thrmisc = calloc(1, sizeof(*thrmisc)); 696 if (thrmisc == NULL) 697 errx(1, "out of memory"); 698 ptrace(PT_LWPINFO, tid, (void *)&lwpinfo, 699 sizeof(lwpinfo)); 700 memset(&thrmisc->_pad, 0, sizeof(thrmisc->_pad)); 701 strcpy(thrmisc->pr_tname, lwpinfo.pl_tdname); 702 703 *sizep = sizeof(*thrmisc); 704 return (thrmisc); 705 } 706 707 static void * 708 elf_note_ptlwpinfo(void *arg, size_t *sizep) 709 { 710 lwpid_t tid; 711 elfcore_lwpinfo_t *elf_info; 712 struct ptrace_lwpinfo lwpinfo; 713 void *p; 714 715 tid = *(lwpid_t *)arg; 716 p = calloc(1, sizeof(int) + sizeof(elfcore_lwpinfo_t)); 717 if (p == NULL) 718 errx(1, "out of memory"); 719 *(int *)p = sizeof(elfcore_lwpinfo_t); 720 elf_info = (void *)((int *)p + 1); 721 ptrace(PT_LWPINFO, tid, (void *)&lwpinfo, sizeof(lwpinfo)); 722 elf_convert_lwpinfo(elf_info, &lwpinfo); 723 724 *sizep = sizeof(int) + sizeof(struct ptrace_lwpinfo); 725 return (p); 726 } 727 728 #if defined(__arm__) 729 static void * 730 elf_note_arm_vfp(void *arg, size_t *sizep) 731 { 732 lwpid_t tid; 733 struct vfpreg *vfp; 734 static bool has_vfp = true; 735 struct vfpreg info; 736 737 tid = *(lwpid_t *)arg; 738 if (has_vfp) { 739 if (ptrace(PT_GETVFPREGS, tid, (void *)&info, 0) != 0) 740 has_vfp = false; 741 } 742 if (!has_vfp) { 743 *sizep = 0; 744 return (NULL); 745 } 746 vfp = calloc(1, sizeof(*vfp)); 747 memcpy(vfp, &info, sizeof(*vfp)); 748 *sizep = sizeof(*vfp); 749 return (vfp); 750 } 751 #endif 752 753 #if defined(__i386__) || defined(__amd64__) 754 static void * 755 elf_note_x86_xstate(void *arg, size_t *sizep) 756 { 757 lwpid_t tid; 758 char *xstate; 759 static bool xsave_checked = false; 760 static struct ptrace_xstate_info info; 761 762 tid = *(lwpid_t *)arg; 763 if (!xsave_checked) { 764 if (ptrace(PT_GETXSTATE_INFO, tid, (void *)&info, 765 sizeof(info)) != 0) 766 info.xsave_len = 0; 767 xsave_checked = true; 768 } 769 if (info.xsave_len == 0) { 770 *sizep = 0; 771 return (NULL); 772 } 773 xstate = calloc(1, info.xsave_len); 774 ptrace(PT_GETXSTATE, tid, xstate, 0); 775 *(uint64_t *)(xstate + X86_XSTATE_XCR0_OFFSET) = info.xsave_mask; 776 *sizep = info.xsave_len; 777 return (xstate); 778 } 779 #endif 780 781 #if defined(__powerpc__) 782 static void * 783 elf_note_powerpc_vmx(void *arg, size_t *sizep) 784 { 785 lwpid_t tid; 786 struct vmxreg *vmx; 787 static bool has_vmx = true; 788 struct vmxreg info; 789 790 tid = *(lwpid_t *)arg; 791 if (has_vmx) { 792 if (ptrace(PT_GETVRREGS, tid, (void *)&info, 793 sizeof(info)) != 0) 794 has_vmx = false; 795 } 796 if (!has_vmx) { 797 *sizep = 0; 798 return (NULL); 799 } 800 vmx = calloc(1, sizeof(*vmx)); 801 memcpy(vmx, &info, sizeof(*vmx)); 802 *sizep = sizeof(*vmx); 803 return (vmx); 804 } 805 806 static void * 807 elf_note_powerpc_vsx(void *arg, size_t *sizep) 808 { 809 lwpid_t tid; 810 char *vshr_data; 811 static bool has_vsx = true; 812 uint64_t vshr[32]; 813 814 tid = *(lwpid_t *)arg; 815 if (has_vsx) { 816 if (ptrace(PT_GETVSRREGS, tid, (void *)vshr, 817 sizeof(vshr)) != 0) 818 has_vsx = false; 819 } 820 if (!has_vsx) { 821 *sizep = 0; 822 return (NULL); 823 } 824 vshr_data = calloc(1, sizeof(vshr)); 825 memcpy(vshr_data, vshr, sizeof(vshr)); 826 *sizep = sizeof(vshr); 827 return (vshr_data); 828 } 829 #endif 830 831 static void * 832 procstat_sysctl(void *arg, int what, size_t structsz, size_t *sizep) 833 { 834 size_t len; 835 pid_t pid; 836 int name[4], structsize; 837 void *buf, *p; 838 839 pid = *(pid_t *)arg; 840 structsize = structsz; 841 name[0] = CTL_KERN; 842 name[1] = KERN_PROC; 843 name[2] = what; 844 name[3] = pid; 845 len = 0; 846 if (sysctl(name, 4, NULL, &len, NULL, 0) == -1) 847 err(1, "kern.proc.%d.%u", what, pid); 848 buf = calloc(1, sizeof(structsize) + len * 4 / 3); 849 if (buf == NULL) 850 errx(1, "out of memory"); 851 bcopy(&structsize, buf, sizeof(structsize)); 852 p = (char *)buf + sizeof(structsize); 853 if (sysctl(name, 4, p, &len, NULL, 0) == -1) 854 err(1, "kern.proc.%d.%u", what, pid); 855 856 *sizep = sizeof(structsize) + len; 857 return (buf); 858 } 859 860 static void * 861 elf_note_procstat_proc(void *arg, size_t *sizep) 862 { 863 864 return (procstat_sysctl(arg, KERN_PROC_PID | KERN_PROC_INC_THREAD, 865 sizeof(struct kinfo_proc), sizep)); 866 } 867 868 static void * 869 elf_note_procstat_files(void *arg, size_t *sizep) 870 { 871 872 return (procstat_sysctl(arg, KERN_PROC_FILEDESC, 873 sizeof(struct kinfo_file), sizep)); 874 } 875 876 static void * 877 elf_note_procstat_vmmap(void *arg, size_t *sizep) 878 { 879 880 return (procstat_sysctl(arg, KERN_PROC_VMMAP, 881 sizeof(struct kinfo_vmentry), sizep)); 882 } 883 884 static void * 885 elf_note_procstat_groups(void *arg, size_t *sizep) 886 { 887 888 return (procstat_sysctl(arg, KERN_PROC_GROUPS, sizeof(gid_t), sizep)); 889 } 890 891 static void * 892 elf_note_procstat_umask(void *arg, size_t *sizep) 893 { 894 895 return (procstat_sysctl(arg, KERN_PROC_UMASK, sizeof(u_short), sizep)); 896 } 897 898 static void * 899 elf_note_procstat_osrel(void *arg, size_t *sizep) 900 { 901 902 return (procstat_sysctl(arg, KERN_PROC_OSREL, sizeof(int), sizep)); 903 } 904 905 static void * 906 elf_note_procstat_psstrings(void *arg, size_t *sizep) 907 { 908 909 return (procstat_sysctl(arg, KERN_PROC_PS_STRINGS, 910 sizeof(vm_offset_t), sizep)); 911 } 912 913 static void * 914 elf_note_procstat_auxv(void *arg, size_t *sizep) 915 { 916 917 return (procstat_sysctl(arg, KERN_PROC_AUXV, 918 sizeof(Elf_Auxinfo), sizep)); 919 } 920 921 static void * 922 elf_note_procstat_rlimit(void *arg, size_t *sizep) 923 { 924 pid_t pid; 925 size_t len; 926 int i, name[5], structsize; 927 void *buf, *p; 928 929 pid = *(pid_t *)arg; 930 structsize = sizeof(struct rlimit) * RLIM_NLIMITS; 931 buf = calloc(1, sizeof(structsize) + structsize); 932 if (buf == NULL) 933 errx(1, "out of memory"); 934 bcopy(&structsize, buf, sizeof(structsize)); 935 p = (char *)buf + sizeof(structsize); 936 name[0] = CTL_KERN; 937 name[1] = KERN_PROC; 938 name[2] = KERN_PROC_RLIMIT; 939 name[3] = pid; 940 len = sizeof(struct rlimit); 941 for (i = 0; i < RLIM_NLIMITS; i++) { 942 name[4] = i; 943 if (sysctl(name, 5, p, &len, NULL, 0) == -1) 944 err(1, "kern.proc.rlimit.%u", pid); 945 if (len != sizeof(struct rlimit)) 946 errx(1, "kern.proc.rlimit.%u: short read", pid); 947 p += len; 948 } 949 950 *sizep = sizeof(structsize) + structsize; 951 return (buf); 952 } 953 954 struct dumpers __elfN(dump) = { elf_ident, elf_coredump }; 955 TEXT_SET(dumpset, __elfN(dump)); 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