1 /* $OpenBSD: exec_elf.c,v 1.90 2013/01/15 01:34:27 deraadt Exp $ */ 2 3 /* 4 * Copyright (c) 1996 Per Fogelstrom 5 * All rights reserved. 6 * 7 * Copyright (c) 1994 Christos Zoulas 8 * All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 * 32 */ 33 34 /* 35 * Copyright (c) 2001 Wasabi Systems, Inc. 36 * All rights reserved. 37 * 38 * Written by Jason R. Thorpe for Wasabi Systems, Inc. 39 * 40 * Redistribution and use in source and binary forms, with or without 41 * modification, are permitted provided that the following conditions 42 * are met: 43 * 1. Redistributions of source code must retain the above copyright 44 * notice, this list of conditions and the following disclaimer. 45 * 2. Redistributions in binary form must reproduce the above copyright 46 * notice, this list of conditions and the following disclaimer in the 47 * documentation and/or other materials provided with the distribution. 48 * 3. All advertising materials mentioning features or use of this software 49 * must display the following acknowledgement: 50 * This product includes software developed for the NetBSD Project by 51 * Wasabi Systems, Inc. 52 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 53 * or promote products derived from this software without specific prior 54 * written permission. 55 * 56 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 57 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 58 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 59 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 60 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 61 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 62 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 63 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 64 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 65 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 66 * POSSIBILITY OF SUCH DAMAGE. 67 */ 68 69 #include <sys/param.h> 70 #include <sys/systm.h> 71 #include <sys/kernel.h> 72 #include <sys/proc.h> 73 #include <sys/malloc.h> 74 #include <sys/pool.h> 75 #include <sys/mount.h> 76 #include <sys/namei.h> 77 #include <sys/vnode.h> 78 #include <sys/core.h> 79 #include <sys/exec.h> 80 #include <sys/exec_elf.h> 81 #include <sys/file.h> 82 #include <sys/ptrace.h> 83 #include <sys/syscall.h> 84 #include <sys/signalvar.h> 85 #include <sys/stat.h> 86 87 #include <sys/mman.h> 88 #include <uvm/uvm_extern.h> 89 90 #include <machine/cpu.h> 91 #include <machine/reg.h> 92 #include <machine/exec.h> 93 94 #ifdef COMPAT_LINUX 95 #include <compat/linux/linux_exec.h> 96 #endif 97 98 struct ELFNAME(probe_entry) { 99 int (*func)(struct proc *, struct exec_package *, char *, 100 u_long *); 101 } ELFNAME(probes)[] = { 102 /* XXX - bogus, shouldn't be size independent.. */ 103 #ifdef COMPAT_LINUX 104 { linux_elf_probe }, 105 #endif 106 { NULL } 107 }; 108 109 int ELFNAME(load_file)(struct proc *, char *, struct exec_package *, 110 struct elf_args *, Elf_Addr *); 111 int ELFNAME(check_header)(Elf_Ehdr *); 112 int ELFNAME(read_from)(struct proc *, struct vnode *, u_long, caddr_t, int); 113 void ELFNAME(load_psection)(struct exec_vmcmd_set *, struct vnode *, 114 Elf_Phdr *, Elf_Addr *, Elf_Addr *, int *, int); 115 int ELFNAMEEND(coredump)(struct proc *, void *); 116 117 extern char sigcode[], esigcode[]; 118 #ifdef SYSCALL_DEBUG 119 extern char *syscallnames[]; 120 #endif 121 122 /* round up and down to page boundaries. */ 123 #define ELF_ROUND(a, b) (((a) + (b) - 1) & ~((b) - 1)) 124 #define ELF_TRUNC(a, b) ((a) & ~((b) - 1)) 125 126 /* 127 * We limit the number of program headers to 32, this should 128 * be a reasonable limit for ELF, the most we have seen so far is 12 129 */ 130 #define ELF_MAX_VALID_PHDR 32 131 132 /* Limit on total PT_OPENBSD_RANDOMIZE bytes. */ 133 #define ELF_RANDOMIZE_LIMIT 1024 134 135 /* 136 * This is the basic elf emul. elf_probe_funcs may change to other emuls. 137 */ 138 struct emul ELFNAMEEND(emul) = { 139 "native", 140 NULL, 141 sendsig, 142 SYS_syscall, 143 SYS_MAXSYSCALL, 144 sysent, 145 #ifdef SYSCALL_DEBUG 146 syscallnames, 147 #else 148 NULL, 149 #endif 150 (sizeof(AuxInfo) * ELF_AUX_ENTRIES / sizeof(char *)), 151 ELFNAME(copyargs), 152 setregs, 153 ELFNAME2(exec,fixup), 154 ELFNAMEEND(coredump), 155 sigcode, 156 esigcode, 157 EMUL_ENABLED | EMUL_NATIVE, 158 }; 159 160 /* 161 * Copy arguments onto the stack in the normal way, but add some 162 * space for extra information in case of dynamic binding. 163 */ 164 void * 165 ELFNAME(copyargs)(struct exec_package *pack, struct ps_strings *arginfo, 166 void *stack, void *argp) 167 { 168 stack = copyargs(pack, arginfo, stack, argp); 169 if (!stack) 170 return (NULL); 171 172 /* 173 * Push space for extra arguments on the stack needed by 174 * dynamically linked binaries. 175 */ 176 if (pack->ep_interp != NULL) { 177 pack->ep_emul_argp = stack; 178 stack = (char *)stack + ELF_AUX_ENTRIES * sizeof (AuxInfo); 179 } 180 return (stack); 181 } 182 183 /* 184 * Check header for validity; return 0 for ok, ENOEXEC if error 185 */ 186 int 187 ELFNAME(check_header)(Elf_Ehdr *ehdr) 188 { 189 /* 190 * We need to check magic, class size, endianess, and version before 191 * we look at the rest of the Elf_Ehdr structure. These few elements 192 * are represented in a machine independent fashion. 193 */ 194 if (!IS_ELF(*ehdr) || 195 ehdr->e_ident[EI_CLASS] != ELF_TARG_CLASS || 196 ehdr->e_ident[EI_DATA] != ELF_TARG_DATA || 197 ehdr->e_ident[EI_VERSION] != ELF_TARG_VER) 198 return (ENOEXEC); 199 200 /* Now check the machine dependent header */ 201 if (ehdr->e_machine != ELF_TARG_MACH || 202 ehdr->e_version != ELF_TARG_VER) 203 return (ENOEXEC); 204 205 /* Don't allow an insane amount of sections. */ 206 if (ehdr->e_phnum > ELF_MAX_VALID_PHDR) 207 return (ENOEXEC); 208 209 return (0); 210 } 211 212 /* 213 * Load a psection at the appropriate address 214 */ 215 void 216 ELFNAME(load_psection)(struct exec_vmcmd_set *vcset, struct vnode *vp, 217 Elf_Phdr *ph, Elf_Addr *addr, Elf_Addr *size, int *prot, int flags) 218 { 219 u_long uaddr, msize, lsize, psize, rm, rf; 220 long diff, offset, bdiff; 221 Elf_Addr base; 222 223 /* 224 * If the user specified an address, then we load there. 225 */ 226 if (*addr != ELFDEFNNAME(NO_ADDR)) { 227 if (ph->p_align > 1) { 228 *addr = ELF_TRUNC(*addr, ph->p_align); 229 diff = ph->p_vaddr - ELF_TRUNC(ph->p_vaddr, ph->p_align); 230 /* page align vaddr */ 231 base = *addr + trunc_page(ph->p_vaddr) 232 - ELF_TRUNC(ph->p_vaddr, ph->p_align); 233 234 bdiff = ph->p_vaddr - trunc_page(ph->p_vaddr); 235 236 } else 237 diff = 0; 238 } else { 239 *addr = uaddr = ph->p_vaddr; 240 if (ph->p_align > 1) 241 *addr = ELF_TRUNC(uaddr, ph->p_align); 242 base = trunc_page(uaddr); 243 bdiff = uaddr - base; 244 diff = uaddr - *addr; 245 } 246 247 *prot |= (ph->p_flags & PF_R) ? VM_PROT_READ : 0; 248 *prot |= (ph->p_flags & PF_W) ? VM_PROT_WRITE : 0; 249 *prot |= (ph->p_flags & PF_X) ? VM_PROT_EXECUTE : 0; 250 251 msize = ph->p_memsz + diff; 252 offset = ph->p_offset - bdiff; 253 lsize = ph->p_filesz + bdiff; 254 psize = round_page(lsize); 255 256 /* 257 * Because the pagedvn pager can't handle zero fill of the last 258 * data page if it's not page aligned we map the last page readvn. 259 */ 260 if (ph->p_flags & PF_W) { 261 psize = trunc_page(lsize); 262 if (psize > 0) 263 NEW_VMCMD2(vcset, vmcmd_map_pagedvn, psize, base, vp, 264 offset, *prot, flags); 265 if (psize != lsize) { 266 NEW_VMCMD2(vcset, vmcmd_map_readvn, lsize - psize, 267 base + psize, vp, offset + psize, *prot, flags); 268 } 269 } else { 270 NEW_VMCMD2(vcset, vmcmd_map_pagedvn, psize, base, vp, offset, 271 *prot, flags); 272 } 273 274 /* 275 * Check if we need to extend the size of the segment 276 */ 277 rm = round_page(*addr + ph->p_memsz + diff); 278 rf = round_page(*addr + ph->p_filesz + diff); 279 280 if (rm != rf) { 281 NEW_VMCMD2(vcset, vmcmd_map_zero, rm - rf, rf, NULLVP, 0, 282 *prot, flags); 283 } 284 *size = msize; 285 } 286 287 /* 288 * Read from vnode into buffer at offset. 289 */ 290 int 291 ELFNAME(read_from)(struct proc *p, struct vnode *vp, u_long off, caddr_t buf, 292 int size) 293 { 294 int error; 295 size_t resid; 296 297 if ((error = vn_rdwr(UIO_READ, vp, buf, size, off, UIO_SYSSPACE, 298 0, p->p_ucred, &resid, p)) != 0) 299 return error; 300 /* 301 * See if we got all of it 302 */ 303 if (resid != 0) 304 return (ENOEXEC); 305 return (0); 306 } 307 308 /* 309 * Load a file (interpreter/library) pointed to by path [stolen from 310 * coff_load_shlib()]. Made slightly generic so it might be used externally. 311 */ 312 int 313 ELFNAME(load_file)(struct proc *p, char *path, struct exec_package *epp, 314 struct elf_args *ap, Elf_Addr *last) 315 { 316 int error, i; 317 struct nameidata nd; 318 Elf_Ehdr eh; 319 Elf_Phdr *ph = NULL; 320 u_long phsize; 321 Elf_Addr addr; 322 struct vnode *vp; 323 Elf_Phdr *base_ph = NULL; 324 struct interp_ld_sec { 325 Elf_Addr vaddr; 326 u_long memsz; 327 } loadmap[ELF_MAX_VALID_PHDR]; 328 int nload, idx = 0; 329 Elf_Addr pos = *last; 330 int file_align; 331 int loop; 332 size_t randomizequota = ELF_RANDOMIZE_LIMIT; 333 334 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, path, p); 335 if ((error = namei(&nd)) != 0) { 336 return (error); 337 } 338 vp = nd.ni_vp; 339 if (vp->v_type != VREG) { 340 error = EACCES; 341 goto bad; 342 } 343 if ((error = VOP_GETATTR(vp, epp->ep_vap, p->p_ucred, p)) != 0) 344 goto bad; 345 if (vp->v_mount->mnt_flag & MNT_NOEXEC) { 346 error = EACCES; 347 goto bad; 348 } 349 if ((error = VOP_ACCESS(vp, VREAD, p->p_ucred, p)) != 0) 350 goto bad1; 351 if ((error = ELFNAME(read_from)(p, nd.ni_vp, 0, 352 (caddr_t)&eh, sizeof(eh))) != 0) 353 goto bad1; 354 355 if (ELFNAME(check_header)(&eh) || eh.e_type != ET_DYN) { 356 error = ENOEXEC; 357 goto bad1; 358 } 359 360 phsize = eh.e_phnum * sizeof(Elf_Phdr); 361 ph = malloc(phsize, M_TEMP, M_WAITOK); 362 363 if ((error = ELFNAME(read_from)(p, nd.ni_vp, eh.e_phoff, (caddr_t)ph, 364 phsize)) != 0) 365 goto bad1; 366 367 for (i = 0; i < eh.e_phnum; i++) { 368 if (ph[i].p_type == PT_LOAD) { 369 loadmap[idx].vaddr = trunc_page(ph[i].p_vaddr); 370 loadmap[idx].memsz = round_page (ph[i].p_vaddr + 371 ph[i].p_memsz - loadmap[idx].vaddr); 372 file_align = ph[i].p_align; 373 idx++; 374 } 375 } 376 nload = idx; 377 378 /* 379 * If no position to load the interpreter was set by a probe 380 * function, pick the same address that a non-fixed mmap(0, ..) 381 * would (i.e. something safely out of the way). 382 */ 383 if (pos == ELFDEFNNAME(NO_ADDR)) { 384 pos = uvm_map_hint(p->p_vmspace, VM_PROT_EXECUTE); 385 } 386 387 pos = ELF_ROUND(pos, file_align); 388 *last = epp->ep_interp_pos = pos; 389 loop = 0; 390 for (i = 0; i < nload;/**/) { 391 vaddr_t addr; 392 struct uvm_object *uobj; 393 off_t uoff; 394 size_t size; 395 396 #ifdef this_needs_fixing 397 if (i == 0) { 398 uobj = &vp->v_uvm.u_obj; 399 /* need to fix uoff */ 400 } else { 401 #endif 402 uobj = NULL; 403 uoff = 0; 404 #ifdef this_needs_fixing 405 } 406 #endif 407 408 addr = trunc_page(pos + loadmap[i].vaddr); 409 size = round_page(addr + loadmap[i].memsz) - addr; 410 411 /* CRAP - map_findspace does not avoid daddr+BRKSIZ */ 412 if ((addr + size > (vaddr_t)p->p_vmspace->vm_daddr) && 413 (addr < (vaddr_t)p->p_vmspace->vm_daddr + BRKSIZ)) 414 addr = round_page((vaddr_t)p->p_vmspace->vm_daddr + 415 BRKSIZ); 416 417 if (uvm_map_mquery(&p->p_vmspace->vm_map, &addr, size, 418 (i == 0 ? uoff : UVM_UNKNOWN_OFFSET), 0) != 0) { 419 if (loop == 0) { 420 loop = 1; 421 i = 0; 422 *last = epp->ep_interp_pos = pos = 0; 423 continue; 424 } 425 error = ENOMEM; 426 goto bad1; 427 } 428 if (addr != pos + loadmap[i].vaddr) { 429 /* base changed. */ 430 pos = addr - trunc_page(loadmap[i].vaddr); 431 pos = ELF_ROUND(pos,file_align); 432 epp->ep_interp_pos = *last = pos; 433 i = 0; 434 continue; 435 } 436 437 i++; 438 } 439 440 /* 441 * Load all the necessary sections 442 */ 443 for (i = 0; i < eh.e_phnum; i++) { 444 Elf_Addr size = 0; 445 int prot = 0; 446 int flags; 447 448 switch (ph[i].p_type) { 449 case PT_LOAD: 450 if (base_ph == NULL) { 451 flags = VMCMD_BASE; 452 addr = *last; 453 base_ph = &ph[i]; 454 } else { 455 flags = VMCMD_RELATIVE; 456 addr = ph[i].p_vaddr - base_ph->p_vaddr; 457 } 458 ELFNAME(load_psection)(&epp->ep_vmcmds, nd.ni_vp, 459 &ph[i], &addr, &size, &prot, flags); 460 /* If entry is within this section it must be text */ 461 if (eh.e_entry >= ph[i].p_vaddr && 462 eh.e_entry < (ph[i].p_vaddr + size)) { 463 epp->ep_entry = addr + eh.e_entry - 464 ELF_TRUNC(ph[i].p_vaddr,ph[i].p_align); 465 ap->arg_interp = addr; 466 } 467 addr += size; 468 break; 469 470 case PT_DYNAMIC: 471 case PT_PHDR: 472 case PT_NOTE: 473 break; 474 475 case PT_OPENBSD_RANDOMIZE: 476 if (ph[i].p_memsz > randomizequota) { 477 error = ENOMEM; 478 goto bad1; 479 } 480 randomizequota -= ph[i].p_memsz; 481 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_randomize, 482 ph[i].p_memsz, ph[i].p_vaddr + pos, NULLVP, 0, 0); 483 break; 484 485 default: 486 break; 487 } 488 } 489 490 vn_marktext(nd.ni_vp); 491 492 bad1: 493 VOP_CLOSE(nd.ni_vp, FREAD, p->p_ucred, p); 494 bad: 495 if (ph != NULL) 496 free(ph, M_TEMP); 497 498 *last = addr; 499 vput(nd.ni_vp); 500 return (error); 501 } 502 503 /* 504 * Prepare an Elf binary's exec package 505 * 506 * First, set of the various offsets/lengths in the exec package. 507 * 508 * Then, mark the text image busy (so it can be demand paged) or error out if 509 * this is not possible. Finally, set up vmcmds for the text, data, bss, and 510 * stack segments. 511 */ 512 int 513 ELFNAME2(exec,makecmds)(struct proc *p, struct exec_package *epp) 514 { 515 Elf_Ehdr *eh = epp->ep_hdr; 516 Elf_Phdr *ph, *pp, *base_ph = NULL; 517 Elf_Addr phdr = 0, exe_base = 0; 518 int error, i; 519 char *interp = NULL; 520 u_long pos = 0, phsize; 521 size_t randomizequota = ELF_RANDOMIZE_LIMIT; 522 523 if (epp->ep_hdrvalid < sizeof(Elf_Ehdr)) 524 return (ENOEXEC); 525 526 if (ELFNAME(check_header)(eh) || 527 (eh->e_type != ET_EXEC && eh->e_type != ET_DYN)) 528 return (ENOEXEC); 529 530 /* 531 * check if vnode is in open for writing, because we want to demand- 532 * page out of it. if it is, don't do it, for various reasons. 533 */ 534 if (epp->ep_vp->v_writecount != 0) { 535 #ifdef DIAGNOSTIC 536 if (epp->ep_vp->v_flag & VTEXT) 537 panic("exec: a VTEXT vnode has writecount != 0"); 538 #endif 539 return (ETXTBSY); 540 } 541 /* 542 * Allocate space to hold all the program headers, and read them 543 * from the file 544 */ 545 phsize = eh->e_phnum * sizeof(Elf_Phdr); 546 ph = malloc(phsize, M_TEMP, M_WAITOK); 547 548 if ((error = ELFNAME(read_from)(p, epp->ep_vp, eh->e_phoff, (caddr_t)ph, 549 phsize)) != 0) 550 goto bad; 551 552 epp->ep_tsize = ELFDEFNNAME(NO_ADDR); 553 epp->ep_dsize = ELFDEFNNAME(NO_ADDR); 554 555 for (i = 0, pp = ph; i < eh->e_phnum; i++, pp++) { 556 if (pp->p_type == PT_INTERP && !interp) { 557 if (pp->p_filesz >= MAXPATHLEN) 558 goto bad; 559 interp = pool_get(&namei_pool, PR_WAITOK); 560 if ((error = ELFNAME(read_from)(p, epp->ep_vp, 561 pp->p_offset, interp, pp->p_filesz)) != 0) { 562 goto bad; 563 } 564 } else if (pp->p_type == PT_LOAD) { 565 if (base_ph == NULL) 566 base_ph = pp; 567 } 568 } 569 570 if (eh->e_type == ET_DYN) { 571 /* need an interpreter and load sections for PIE */ 572 if (interp == NULL || base_ph == NULL) 573 goto bad; 574 /* randomize exe_base for PIE */ 575 exe_base = uvm_map_pie(base_ph->p_align); 576 } 577 578 /* 579 * OK, we want a slightly different twist of the 580 * standard emulation package for "real" elf. 581 */ 582 epp->ep_emul = &ELFNAMEEND(emul); 583 pos = ELFDEFNNAME(NO_ADDR); 584 585 /* 586 * On the same architecture, we may be emulating different systems. 587 * See which one will accept this executable. 588 * 589 * Probe functions would normally see if the interpreter (if any) 590 * exists. Emulation packages may possibly replace the interpreter in 591 * *interp with a changed path (/emul/xxx/<path>), and also 592 * set the ep_emul field in the exec package structure. 593 */ 594 error = ENOEXEC; 595 if (eh->e_ident[EI_OSABI] != ELFOSABI_OPENBSD && 596 ELFNAME(os_pt_note)(p, epp, epp->ep_hdr, "OpenBSD", 8, 4) != 0) { 597 for (i = 0; ELFNAME(probes)[i].func != NULL && error; i++) 598 error = (*ELFNAME(probes)[i].func)(p, epp, interp, &pos); 599 if (error) 600 goto bad; 601 } 602 603 /* 604 * Load all the necessary sections 605 */ 606 for (i = 0, pp = ph; i < eh->e_phnum; i++, pp++) { 607 Elf_Addr addr, size = 0; 608 int prot = 0; 609 int flags = 0; 610 611 switch (pp->p_type) { 612 case PT_LOAD: 613 if (exe_base != 0) { 614 if (pp == base_ph) { 615 flags = VMCMD_BASE; 616 addr = exe_base; 617 } else { 618 flags = VMCMD_RELATIVE; 619 addr = pp->p_vaddr - base_ph->p_vaddr; 620 } 621 } else 622 addr = ELFDEFNNAME(NO_ADDR); 623 624 /* 625 * Calculates size of text and data segments 626 * by starting at first and going to end of last. 627 * 'rwx' sections are treated as data. 628 * this is correct for BSS_PLT, but may not be 629 * for DATA_PLT, is fine for TEXT_PLT. 630 */ 631 ELFNAME(load_psection)(&epp->ep_vmcmds, epp->ep_vp, 632 pp, &addr, &size, &prot, flags); 633 634 /* 635 * Update exe_base in case alignment was off. 636 * For PIE, addr is relative to exe_base so 637 * adjust it (non PIE exe_base is 0 so no change). 638 */ 639 if (flags == VMCMD_BASE) 640 exe_base = addr; 641 else 642 addr += exe_base; 643 644 /* 645 * Decide whether it's text or data by looking 646 * at the protection of the section 647 */ 648 if (prot & VM_PROT_WRITE) { 649 /* data section */ 650 if (epp->ep_dsize == ELFDEFNNAME(NO_ADDR)) { 651 epp->ep_daddr = addr; 652 epp->ep_dsize = size; 653 } else { 654 if (addr < epp->ep_daddr) { 655 epp->ep_dsize = 656 epp->ep_dsize + 657 epp->ep_daddr - 658 addr; 659 epp->ep_daddr = addr; 660 } else 661 epp->ep_dsize = addr+size - 662 epp->ep_daddr; 663 } 664 } else if (prot & VM_PROT_EXECUTE) { 665 /* text section */ 666 if (epp->ep_tsize == ELFDEFNNAME(NO_ADDR)) { 667 epp->ep_taddr = addr; 668 epp->ep_tsize = size; 669 } else { 670 if (addr < epp->ep_taddr) { 671 epp->ep_tsize = 672 epp->ep_tsize + 673 epp->ep_taddr - 674 addr; 675 epp->ep_taddr = addr; 676 } else 677 epp->ep_tsize = addr+size - 678 epp->ep_taddr; 679 } 680 } 681 break; 682 683 case PT_SHLIB: 684 error = ENOEXEC; 685 goto bad; 686 687 case PT_INTERP: 688 /* Already did this one */ 689 case PT_DYNAMIC: 690 case PT_NOTE: 691 break; 692 693 case PT_PHDR: 694 /* Note address of program headers (in text segment) */ 695 phdr = pp->p_vaddr; 696 break; 697 698 case PT_OPENBSD_RANDOMIZE: 699 if (ph[i].p_memsz > randomizequota) { 700 error = ENOMEM; 701 goto bad; 702 } 703 randomizequota -= ph[i].p_memsz; 704 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_randomize, 705 ph[i].p_memsz, ph[i].p_vaddr + exe_base, NULLVP, 0, 0); 706 break; 707 708 default: 709 /* 710 * Not fatal, we don't need to understand everything 711 * :-) 712 */ 713 break; 714 } 715 } 716 717 phdr += exe_base; 718 719 /* 720 * Strangely some linux programs may have all load sections marked 721 * writeable, in this case, textsize is not -1, but rather 0; 722 */ 723 if (epp->ep_tsize == ELFDEFNNAME(NO_ADDR)) 724 epp->ep_tsize = 0; 725 /* 726 * Another possibility is that it has all load sections marked 727 * read-only. Fake a zero-sized data segment right after the 728 * text segment. 729 */ 730 if (epp->ep_dsize == ELFDEFNNAME(NO_ADDR)) { 731 epp->ep_daddr = round_page(epp->ep_taddr + epp->ep_tsize); 732 epp->ep_dsize = 0; 733 } 734 735 epp->ep_interp = interp; 736 epp->ep_entry = eh->e_entry + exe_base; 737 738 /* 739 * Check if we found a dynamically linked binary and arrange to load 740 * its interpreter when the exec file is released. 741 */ 742 if (interp) { 743 struct elf_args *ap; 744 745 ap = malloc(sizeof(struct elf_args), M_TEMP, M_WAITOK); 746 747 ap->arg_phaddr = phdr; 748 ap->arg_phentsize = eh->e_phentsize; 749 ap->arg_phnum = eh->e_phnum; 750 ap->arg_entry = eh->e_entry + exe_base; 751 752 epp->ep_emul_arg = ap; 753 epp->ep_interp_pos = pos; 754 } 755 756 free(ph, M_TEMP); 757 vn_marktext(epp->ep_vp); 758 return (exec_setup_stack(p, epp)); 759 760 bad: 761 if (interp) 762 pool_put(&namei_pool, interp); 763 free(ph, M_TEMP); 764 kill_vmcmds(&epp->ep_vmcmds); 765 return (ENOEXEC); 766 } 767 768 /* 769 * Phase II of load. It is now safe to load the interpreter. Info collected 770 * when loading the program is available for setup of the interpreter. 771 */ 772 int 773 ELFNAME2(exec,fixup)(struct proc *p, struct exec_package *epp) 774 { 775 char *interp; 776 int error; 777 struct elf_args *ap; 778 AuxInfo ai[ELF_AUX_ENTRIES], *a; 779 Elf_Addr pos = epp->ep_interp_pos; 780 781 if (epp->ep_interp == NULL) { 782 return (0); 783 } 784 785 interp = epp->ep_interp; 786 ap = epp->ep_emul_arg; 787 788 if ((error = ELFNAME(load_file)(p, interp, epp, ap, &pos)) != 0) { 789 free(ap, M_TEMP); 790 pool_put(&namei_pool, interp); 791 kill_vmcmds(&epp->ep_vmcmds); 792 return (error); 793 } 794 /* 795 * We have to do this ourselves... 796 */ 797 error = exec_process_vmcmds(p, epp); 798 799 /* 800 * Push extra arguments on the stack needed by dynamically 801 * linked binaries 802 */ 803 if (error == 0) { 804 a = ai; 805 806 a->au_id = AUX_phdr; 807 a->au_v = ap->arg_phaddr; 808 a++; 809 810 a->au_id = AUX_phent; 811 a->au_v = ap->arg_phentsize; 812 a++; 813 814 a->au_id = AUX_phnum; 815 a->au_v = ap->arg_phnum; 816 a++; 817 818 a->au_id = AUX_pagesz; 819 a->au_v = PAGE_SIZE; 820 a++; 821 822 a->au_id = AUX_base; 823 a->au_v = ap->arg_interp; 824 a++; 825 826 a->au_id = AUX_flags; 827 a->au_v = 0; 828 a++; 829 830 a->au_id = AUX_entry; 831 a->au_v = ap->arg_entry; 832 a++; 833 834 a->au_id = AUX_null; 835 a->au_v = 0; 836 a++; 837 838 error = copyout(ai, epp->ep_emul_argp, sizeof ai); 839 } 840 free(ap, M_TEMP); 841 pool_put(&namei_pool, interp); 842 return (error); 843 } 844 845 /* 846 * Older ELF binaries use EI_ABIVERSION (formerly EI_BRAND) to brand 847 * executables. Newer ELF binaries use EI_OSABI instead. 848 */ 849 char * 850 ELFNAME(check_brand)(Elf_Ehdr *eh) 851 { 852 if (eh->e_ident[EI_ABIVERSION] == '\0') 853 return (NULL); 854 return (&eh->e_ident[EI_ABIVERSION]); 855 } 856 857 int 858 ELFNAME(os_pt_note)(struct proc *p, struct exec_package *epp, Elf_Ehdr *eh, 859 char *os_name, size_t name_size, size_t desc_size) 860 { 861 Elf_Phdr *hph, *ph; 862 Elf_Note *np = NULL; 863 size_t phsize; 864 int error; 865 866 phsize = eh->e_phnum * sizeof(Elf_Phdr); 867 hph = malloc(phsize, M_TEMP, M_WAITOK); 868 if ((error = ELFNAME(read_from)(p, epp->ep_vp, eh->e_phoff, 869 (caddr_t)hph, phsize)) != 0) 870 goto out1; 871 872 for (ph = hph; ph < &hph[eh->e_phnum]; ph++) { 873 if (ph->p_type != PT_NOTE || 874 ph->p_filesz > 1024 || 875 ph->p_filesz < sizeof(Elf_Note) + name_size) 876 continue; 877 878 np = malloc(ph->p_filesz, M_TEMP, M_WAITOK); 879 if ((error = ELFNAME(read_from)(p, epp->ep_vp, ph->p_offset, 880 (caddr_t)np, ph->p_filesz)) != 0) 881 goto out2; 882 883 #if 0 884 if (np->type != ELF_NOTE_TYPE_OSVERSION) { 885 free(np, M_TEMP); 886 np = NULL; 887 continue; 888 } 889 #endif 890 891 /* Check the name and description sizes. */ 892 if (np->namesz != name_size || 893 np->descsz != desc_size) 894 goto out3; 895 896 if (bcmp((np + 1), os_name, name_size)) 897 goto out3; 898 899 /* XXX: We could check for the specific emulation here */ 900 /* All checks succeeded. */ 901 error = 0; 902 goto out2; 903 } 904 905 out3: 906 error = ENOEXEC; 907 out2: 908 if (np) 909 free(np, M_TEMP); 910 out1: 911 free(hph, M_TEMP); 912 return error; 913 } 914 915 struct countsegs_state { 916 int npsections; 917 }; 918 919 int ELFNAMEEND(coredump_countsegs)(struct proc *, void *, 920 struct uvm_coredump_state *); 921 922 struct writesegs_state { 923 Elf_Phdr *psections; 924 off_t secoff; 925 }; 926 927 int ELFNAMEEND(coredump_writeseghdrs)(struct proc *, void *, 928 struct uvm_coredump_state *); 929 930 int ELFNAMEEND(coredump_notes)(struct proc *, void *, size_t *); 931 int ELFNAMEEND(coredump_note)(struct proc *, void *, size_t *); 932 int ELFNAMEEND(coredump_writenote)(struct proc *, void *, Elf_Note *, 933 const char *, void *); 934 935 #define ELFROUNDSIZE 4 /* XXX Should it be sizeof(Elf_Word)? */ 936 #define elfround(x) roundup((x), ELFROUNDSIZE) 937 938 int 939 ELFNAMEEND(coredump)(struct proc *p, void *cookie) 940 { 941 #ifdef SMALL_KERNEL 942 return EPERM; 943 #else 944 Elf_Ehdr ehdr; 945 Elf_Phdr phdr, *psections; 946 struct countsegs_state cs; 947 struct writesegs_state ws; 948 off_t notestart, secstart, offset; 949 size_t notesize; 950 int error, i; 951 952 psections = NULL; 953 /* 954 * We have to make a total of 3 passes across the map: 955 * 956 * 1. Count the number of map entries (the number of 957 * PT_LOAD sections). 958 * 959 * 2. Write the P-section headers. 960 * 961 * 3. Write the P-sections. 962 */ 963 964 /* Pass 1: count the entries. */ 965 cs.npsections = 0; 966 error = uvm_coredump_walkmap(p, NULL, 967 ELFNAMEEND(coredump_countsegs), &cs); 968 if (error) 969 goto out; 970 971 /* Count the PT_NOTE section. */ 972 cs.npsections++; 973 974 /* Get the size of the notes. */ 975 error = ELFNAMEEND(coredump_notes)(p, NULL, ¬esize); 976 if (error) 977 goto out; 978 979 memset(&ehdr, 0, sizeof(ehdr)); 980 memcpy(ehdr.e_ident, ELFMAG, SELFMAG); 981 ehdr.e_ident[EI_CLASS] = ELF_TARG_CLASS; 982 ehdr.e_ident[EI_DATA] = ELF_TARG_DATA; 983 ehdr.e_ident[EI_VERSION] = EV_CURRENT; 984 /* XXX Should be the OSABI/ABI version of the executable. */ 985 ehdr.e_ident[EI_OSABI] = ELFOSABI_SYSV; 986 ehdr.e_ident[EI_ABIVERSION] = 0; 987 ehdr.e_type = ET_CORE; 988 /* XXX This should be the e_machine of the executable. */ 989 ehdr.e_machine = ELF_TARG_MACH; 990 ehdr.e_version = EV_CURRENT; 991 ehdr.e_entry = 0; 992 ehdr.e_phoff = sizeof(ehdr); 993 ehdr.e_shoff = 0; 994 ehdr.e_flags = 0; 995 ehdr.e_ehsize = sizeof(ehdr); 996 ehdr.e_phentsize = sizeof(Elf_Phdr); 997 ehdr.e_phnum = cs.npsections; 998 ehdr.e_shentsize = 0; 999 ehdr.e_shnum = 0; 1000 ehdr.e_shstrndx = 0; 1001 1002 /* Write out the ELF header. */ 1003 error = coredump_write(cookie, UIO_SYSSPACE, &ehdr, sizeof(ehdr)); 1004 if (error) 1005 goto out; 1006 1007 offset = sizeof(ehdr); 1008 1009 notestart = offset + sizeof(phdr) * cs.npsections; 1010 secstart = notestart + notesize; 1011 1012 psections = malloc(cs.npsections * sizeof(Elf_Phdr), 1013 M_TEMP, M_WAITOK|M_ZERO); 1014 1015 /* Pass 2: now write the P-section headers. */ 1016 ws.secoff = secstart; 1017 ws.psections = psections; 1018 error = uvm_coredump_walkmap(p, cookie, 1019 ELFNAMEEND(coredump_writeseghdrs), &ws); 1020 if (error) 1021 goto out; 1022 1023 /* Write out the PT_NOTE header. */ 1024 ws.psections->p_type = PT_NOTE; 1025 ws.psections->p_offset = notestart; 1026 ws.psections->p_vaddr = 0; 1027 ws.psections->p_paddr = 0; 1028 ws.psections->p_filesz = notesize; 1029 ws.psections->p_memsz = 0; 1030 ws.psections->p_flags = PF_R; 1031 ws.psections->p_align = ELFROUNDSIZE; 1032 1033 error = coredump_write(cookie, UIO_SYSSPACE, psections, 1034 cs.npsections * sizeof(Elf_Phdr)); 1035 if (error) 1036 goto out; 1037 1038 #ifdef DIAGNOSTIC 1039 offset += cs.npsections * sizeof(Elf_Phdr); 1040 if (offset != notestart) 1041 panic("coredump: offset %lld != notestart %lld", 1042 (long long) offset, (long long) notestart); 1043 #endif 1044 1045 /* Write out the notes. */ 1046 error = ELFNAMEEND(coredump_notes)(p, cookie, ¬esize); 1047 if (error) 1048 goto out; 1049 1050 #ifdef DIAGNOSTIC 1051 offset += notesize; 1052 if (offset != secstart) 1053 panic("coredump: offset %lld != secstart %lld", 1054 (long long) offset, (long long) secstart); 1055 #endif 1056 1057 /* Pass 3: finally, write the sections themselves. */ 1058 for (i = 0; i < cs.npsections - 1; i++) { 1059 if (psections[i].p_filesz == 0) 1060 continue; 1061 1062 #ifdef DIAGNOSTIC 1063 if (offset != psections[i].p_offset) 1064 panic("coredump: offset %lld != p_offset[%d] %lld", 1065 (long long) offset, i, 1066 (long long) psections[i].p_filesz); 1067 #endif 1068 1069 error = coredump_write(cookie, UIO_USERSPACE, 1070 (void *)(vaddr_t)psections[i].p_vaddr, 1071 psections[i].p_filesz); 1072 if (error) 1073 goto out; 1074 1075 coredump_unmap(cookie, (vaddr_t)psections[i].p_vaddr, 1076 (vaddr_t)psections[i].p_vaddr + psections[i].p_filesz); 1077 1078 #ifdef DIAGNOSTIC 1079 offset += psections[i].p_filesz; 1080 #endif 1081 } 1082 1083 out: 1084 if (psections) 1085 free(psections, M_TEMP); 1086 return (error); 1087 #endif 1088 } 1089 1090 int 1091 ELFNAMEEND(coredump_countsegs)(struct proc *p, void *iocookie, 1092 struct uvm_coredump_state *us) 1093 { 1094 #ifndef SMALL_KERNEL 1095 struct countsegs_state *cs = us->cookie; 1096 1097 cs->npsections++; 1098 #endif 1099 return (0); 1100 } 1101 1102 int 1103 ELFNAMEEND(coredump_writeseghdrs)(struct proc *p, void *iocookie, 1104 struct uvm_coredump_state *us) 1105 { 1106 #ifndef SMALL_KERNEL 1107 struct writesegs_state *ws = us->cookie; 1108 Elf_Phdr phdr; 1109 vsize_t size, realsize; 1110 1111 size = us->end - us->start; 1112 realsize = us->realend - us->start; 1113 1114 phdr.p_type = PT_LOAD; 1115 phdr.p_offset = ws->secoff; 1116 phdr.p_vaddr = us->start; 1117 phdr.p_paddr = 0; 1118 phdr.p_filesz = realsize; 1119 phdr.p_memsz = size; 1120 phdr.p_flags = 0; 1121 if (us->prot & VM_PROT_READ) 1122 phdr.p_flags |= PF_R; 1123 if (us->prot & VM_PROT_WRITE) 1124 phdr.p_flags |= PF_W; 1125 if (us->prot & VM_PROT_EXECUTE) 1126 phdr.p_flags |= PF_X; 1127 phdr.p_align = PAGE_SIZE; 1128 1129 ws->secoff += phdr.p_filesz; 1130 *ws->psections++ = phdr; 1131 #endif 1132 1133 return (0); 1134 } 1135 1136 int 1137 ELFNAMEEND(coredump_notes)(struct proc *p, void *iocookie, size_t *sizep) 1138 { 1139 #ifndef SMALL_KERNEL 1140 struct ps_strings pss; 1141 struct iovec iov; 1142 struct uio uio; 1143 struct elfcore_procinfo cpi; 1144 Elf_Note nhdr; 1145 struct process *pr = p->p_p; 1146 struct proc *q; 1147 size_t size, notesize; 1148 int error; 1149 1150 size = 0; 1151 1152 /* First, write an elfcore_procinfo. */ 1153 notesize = sizeof(nhdr) + elfround(sizeof("OpenBSD")) + 1154 elfround(sizeof(cpi)); 1155 if (iocookie) { 1156 bzero(&cpi, sizeof(cpi)); 1157 1158 cpi.cpi_version = ELFCORE_PROCINFO_VERSION; 1159 cpi.cpi_cpisize = sizeof(cpi); 1160 cpi.cpi_signo = p->p_sisig; 1161 cpi.cpi_sigcode = p->p_sicode; 1162 1163 cpi.cpi_sigpend = p->p_siglist; 1164 cpi.cpi_sigmask = p->p_sigmask; 1165 cpi.cpi_sigignore = p->p_sigacts->ps_sigignore; 1166 cpi.cpi_sigcatch = p->p_sigacts->ps_sigcatch; 1167 1168 cpi.cpi_pid = pr->ps_pid; 1169 cpi.cpi_ppid = pr->ps_pptr->ps_pid; 1170 cpi.cpi_pgrp = pr->ps_pgid; 1171 if (pr->ps_session->s_leader) 1172 cpi.cpi_sid = pr->ps_session->s_leader->ps_pid; 1173 else 1174 cpi.cpi_sid = 0; 1175 1176 cpi.cpi_ruid = p->p_cred->p_ruid; 1177 cpi.cpi_euid = p->p_ucred->cr_uid; 1178 cpi.cpi_svuid = p->p_cred->p_svuid; 1179 1180 cpi.cpi_rgid = p->p_cred->p_rgid; 1181 cpi.cpi_egid = p->p_ucred->cr_gid; 1182 cpi.cpi_svgid = p->p_cred->p_svgid; 1183 1184 (void)strlcpy(cpi.cpi_name, p->p_comm, sizeof(cpi.cpi_name)); 1185 1186 nhdr.namesz = sizeof("OpenBSD"); 1187 nhdr.descsz = sizeof(cpi); 1188 nhdr.type = NT_OPENBSD_PROCINFO; 1189 1190 error = ELFNAMEEND(coredump_writenote)(p, iocookie, &nhdr, 1191 "OpenBSD", &cpi); 1192 if (error) 1193 return (error); 1194 } 1195 size += notesize; 1196 1197 /* Second, write an NT_OPENBSD_AUXV note. */ 1198 notesize = sizeof(nhdr) + elfround(sizeof("OpenBSD")) + 1199 elfround(p->p_emul->e_arglen * sizeof(char *)); 1200 if (iocookie) { 1201 iov.iov_base = &pss; 1202 iov.iov_len = sizeof(pss); 1203 uio.uio_iov = &iov; 1204 uio.uio_iovcnt = 1; 1205 uio.uio_offset = (off_t)(vaddr_t)PS_STRINGS; 1206 uio.uio_resid = sizeof(pss); 1207 uio.uio_segflg = UIO_SYSSPACE; 1208 uio.uio_rw = UIO_READ; 1209 uio.uio_procp = NULL; 1210 1211 error = uvm_io(&p->p_vmspace->vm_map, &uio, 0); 1212 if (error) 1213 return (error); 1214 1215 if (pss.ps_envstr == NULL) 1216 return (EIO); 1217 1218 nhdr.namesz = sizeof("OpenBSD"); 1219 nhdr.descsz = p->p_emul->e_arglen * sizeof(char *); 1220 nhdr.type = NT_OPENBSD_AUXV; 1221 1222 error = coredump_write(iocookie, UIO_SYSSPACE, 1223 &nhdr, sizeof(nhdr)); 1224 if (error) 1225 return (error); 1226 1227 error = coredump_write(iocookie, UIO_SYSSPACE, 1228 "OpenBSD", elfround(nhdr.namesz)); 1229 if (error) 1230 return (error); 1231 1232 error = coredump_write(iocookie, UIO_USERSPACE, 1233 pss.ps_envstr + pss.ps_nenvstr + 1, nhdr.descsz); 1234 if (error) 1235 return (error); 1236 } 1237 size += notesize; 1238 1239 #ifdef PT_WCOOKIE 1240 notesize = sizeof(nhdr) + elfround(sizeof("OpenBSD")) + 1241 elfround(sizeof(register_t)); 1242 if (iocookie) { 1243 register_t wcookie; 1244 1245 nhdr.namesz = sizeof("OpenBSD"); 1246 nhdr.descsz = sizeof(register_t); 1247 nhdr.type = NT_OPENBSD_WCOOKIE; 1248 1249 wcookie = process_get_wcookie(p); 1250 error = ELFNAMEEND(coredump_writenote)(p, iocookie, &nhdr, 1251 "OpenBSD", &wcookie); 1252 if (error) 1253 return (error); 1254 } 1255 size += notesize; 1256 #endif 1257 1258 /* 1259 * Now write the register info for the thread that caused the 1260 * coredump. 1261 */ 1262 error = ELFNAMEEND(coredump_note)(p, iocookie, ¬esize); 1263 if (error) 1264 return (error); 1265 size += notesize; 1266 1267 /* 1268 * Now, for each thread, write the register info and any other 1269 * per-thread notes. Since we're dumping core, we don't bother 1270 * locking. 1271 */ 1272 TAILQ_FOREACH(q, &pr->ps_threads, p_thr_link) { 1273 if (q == p) /* we've taken care of this thread */ 1274 continue; 1275 error = ELFNAMEEND(coredump_note)(q, iocookie, ¬esize); 1276 if (error) 1277 return (error); 1278 size += notesize; 1279 } 1280 1281 *sizep = size; 1282 #endif 1283 return (0); 1284 } 1285 1286 int 1287 ELFNAMEEND(coredump_note)(struct proc *p, void *iocookie, size_t *sizep) 1288 { 1289 #ifndef SMALL_KERNEL 1290 Elf_Note nhdr; 1291 int size, notesize, error; 1292 int namesize; 1293 char name[64+ELFROUNDSIZE]; 1294 struct reg intreg; 1295 #ifdef PT_GETFPREGS 1296 struct fpreg freg; 1297 #endif 1298 1299 size = 0; 1300 1301 snprintf(name, sizeof(name)-ELFROUNDSIZE, "%s@%d", 1302 "OpenBSD", p->p_pid); 1303 namesize = strlen(name) + 1; 1304 memset(name + namesize, 0, elfround(namesize) - namesize); 1305 1306 notesize = sizeof(nhdr) + elfround(namesize) + elfround(sizeof(intreg)); 1307 if (iocookie) { 1308 error = process_read_regs(p, &intreg); 1309 if (error) 1310 return (error); 1311 1312 nhdr.namesz = namesize; 1313 nhdr.descsz = sizeof(intreg); 1314 nhdr.type = NT_OPENBSD_REGS; 1315 1316 error = ELFNAMEEND(coredump_writenote)(p, iocookie, &nhdr, 1317 name, &intreg); 1318 if (error) 1319 return (error); 1320 1321 } 1322 size += notesize; 1323 1324 #ifdef PT_GETFPREGS 1325 notesize = sizeof(nhdr) + elfround(namesize) + elfround(sizeof(freg)); 1326 if (iocookie) { 1327 error = process_read_fpregs(p, &freg); 1328 if (error) 1329 return (error); 1330 1331 nhdr.namesz = namesize; 1332 nhdr.descsz = sizeof(freg); 1333 nhdr.type = NT_OPENBSD_FPREGS; 1334 1335 error = ELFNAMEEND(coredump_writenote)(p, iocookie, &nhdr, 1336 name, &freg); 1337 if (error) 1338 return (error); 1339 } 1340 size += notesize; 1341 #endif 1342 1343 *sizep = size; 1344 /* XXX Add hook for machdep per-LWP notes. */ 1345 #endif 1346 return (0); 1347 } 1348 1349 int 1350 ELFNAMEEND(coredump_writenote)(struct proc *p, void *cookie, Elf_Note *nhdr, 1351 const char *name, void *data) 1352 { 1353 #ifdef SMALL_KERNEL 1354 return EPERM; 1355 #else 1356 int error; 1357 1358 error = coredump_write(cookie, UIO_SYSSPACE, nhdr, sizeof(*nhdr)); 1359 if (error) 1360 return error; 1361 1362 error = coredump_write(cookie, UIO_SYSSPACE, name, 1363 elfround(nhdr->namesz)); 1364 if (error) 1365 return error; 1366 1367 return coredump_write(cookie, UIO_SYSSPACE, data, nhdr->descsz); 1368 #endif 1369 } 1370