exec_elf32.c revision 1.69
1/* $NetBSD: exec_elf32.c,v 1.69 2001/11/12 15:25:03 lukem Exp $ */ 2 3/*- 4 * Copyright (c) 1994, 2000 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Christos Zoulas. 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. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39/* 40 * Copyright (c) 1996 Christopher G. Demetriou 41 * All rights reserved. 42 * 43 * Redistribution and use in source and binary forms, with or without 44 * modification, are permitted provided that the following conditions 45 * are met: 46 * 1. Redistributions of source code must retain the above copyright 47 * notice, this list of conditions and the following disclaimer. 48 * 2. Redistributions in binary form must reproduce the above copyright 49 * notice, this list of conditions and the following disclaimer in the 50 * documentation and/or other materials provided with the distribution. 51 * 3. The name of the author may not be used to endorse or promote products 52 * derived from this software without specific prior written permission 53 * 54 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 55 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 56 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 57 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 58 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 59 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 60 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 61 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 62 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 63 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 64 */ 65 66#include <sys/cdefs.h> 67__KERNEL_RCSID(1, "$NetBSD: exec_elf32.c,v 1.69 2001/11/12 15:25:03 lukem Exp $"); 68 69/* If not included by exec_elf64.c, ELFSIZE won't be defined. */ 70#ifndef ELFSIZE 71#define ELFSIZE 32 72#endif 73 74#include <sys/param.h> 75#include <sys/proc.h> 76#include <sys/malloc.h> 77#include <sys/namei.h> 78#include <sys/vnode.h> 79#include <sys/exec.h> 80#include <sys/exec_elf.h> 81#include <sys/syscall.h> 82#include <sys/signalvar.h> 83#include <sys/mount.h> 84#include <sys/stat.h> 85 86#include <machine/cpu.h> 87#include <machine/reg.h> 88 89extern const struct emul emul_netbsd; 90 91int ELFNAME(check_header)(Elf_Ehdr *, int); 92int ELFNAME(load_file)(struct proc *, struct exec_package *, char *, 93 struct exec_vmcmd_set *, u_long *, struct elf_args *, Elf_Addr *); 94void ELFNAME(load_psection)(struct exec_vmcmd_set *, struct vnode *, 95 const Elf_Phdr *, Elf_Addr *, u_long *, int *, int); 96 97int ELFNAME2(netbsd,signature)(struct proc *, struct exec_package *, 98 Elf_Ehdr *); 99int ELFNAME2(netbsd,probe)(struct proc *, struct exec_package *, 100 void *, char *, vaddr_t *); 101 102/* round up and down to page boundaries. */ 103#define ELF_ROUND(a, b) (((a) + (b) - 1) & ~((b) - 1)) 104#define ELF_TRUNC(a, b) ((a) & ~((b) - 1)) 105 106/* 107 * Copy arguments onto the stack in the normal way, but add some 108 * extra information in case of dynamic binding. 109 */ 110int 111ELFNAME(copyargs)(struct exec_package *pack, struct ps_strings *arginfo, 112 char **stackp, void *argp) 113{ 114 size_t len; 115 AuxInfo ai[ELF_AUX_ENTRIES], *a; 116 struct elf_args *ap; 117 int error; 118 119 if ((error = copyargs(pack, arginfo, stackp, argp)) != 0) 120 return error; 121 122 a = ai; 123 124 /* 125 * Push extra arguments on the stack needed by dynamically 126 * linked binaries 127 */ 128 if ((ap = (struct elf_args *)pack->ep_emul_arg)) { 129 130 a->a_type = AT_PHDR; 131 a->a_v = ap->arg_phaddr; 132 a++; 133 134 a->a_type = AT_PHENT; 135 a->a_v = ap->arg_phentsize; 136 a++; 137 138 a->a_type = AT_PHNUM; 139 a->a_v = ap->arg_phnum; 140 a++; 141 142 a->a_type = AT_PAGESZ; 143 a->a_v = PAGE_SIZE; 144 a++; 145 146 a->a_type = AT_BASE; 147 a->a_v = ap->arg_interp; 148 a++; 149 150 a->a_type = AT_FLAGS; 151 a->a_v = 0; 152 a++; 153 154 a->a_type = AT_ENTRY; 155 a->a_v = ap->arg_entry; 156 a++; 157 158 free((char *)ap, M_TEMP); 159 pack->ep_emul_arg = NULL; 160 } 161 162 a->a_type = AT_NULL; 163 a->a_v = 0; 164 a++; 165 166 len = (a - ai) * sizeof(AuxInfo); 167 if ((error = copyout(ai, *stackp, len)) != 0) 168 return error; 169 *stackp += len; 170 171 return 0; 172} 173 174/* 175 * elf_check_header(): 176 * 177 * Check header for validity; return 0 of ok ENOEXEC if error 178 */ 179int 180ELFNAME(check_header)(Elf_Ehdr *eh, int type) 181{ 182 183 if (memcmp(eh->e_ident, ELFMAG, SELFMAG) != 0 || 184 eh->e_ident[EI_CLASS] != ELFCLASS) 185 return (ENOEXEC); 186 187 switch (eh->e_machine) { 188 189 ELFDEFNNAME(MACHDEP_ID_CASES) 190 191 default: 192 return (ENOEXEC); 193 } 194 195 if (eh->e_type != type) 196 return (ENOEXEC); 197 198 if (eh->e_shnum > 512 || 199 eh->e_phnum > 128) 200 return (ENOEXEC); 201 202 return (0); 203} 204 205/* 206 * elf_load_psection(): 207 * 208 * Load a psection at the appropriate address 209 */ 210void 211ELFNAME(load_psection)(struct exec_vmcmd_set *vcset, struct vnode *vp, 212 const Elf_Phdr *ph, Elf_Addr *addr, u_long *size, int *prot, int flags) 213{ 214 u_long uaddr, msize, psize, rm, rf; 215 long diff, offset; 216 217 /* 218 * If the user specified an address, then we load there. 219 */ 220 if (*addr != ELFDEFNNAME(NO_ADDR)) { 221 if (ph->p_align > 1) { 222 *addr = ELF_TRUNC(*addr, ph->p_align); 223 uaddr = ELF_TRUNC(ph->p_vaddr, ph->p_align); 224 } else 225 uaddr = ph->p_vaddr; 226 diff = ph->p_vaddr - uaddr; 227 } else { 228 *addr = uaddr = ph->p_vaddr; 229 if (ph->p_align > 1) 230 *addr = ELF_TRUNC(uaddr, ph->p_align); 231 diff = uaddr - *addr; 232 } 233 234 *prot |= (ph->p_flags & PF_R) ? VM_PROT_READ : 0; 235 *prot |= (ph->p_flags & PF_W) ? VM_PROT_WRITE : 0; 236 *prot |= (ph->p_flags & PF_X) ? VM_PROT_EXECUTE : 0; 237 238 offset = ph->p_offset - diff; 239 *size = ph->p_filesz + diff; 240 msize = ph->p_memsz + diff; 241 242 if (ph->p_align >= PAGE_SIZE) { 243 if ((ph->p_flags & PF_W) != 0) { 244 /* 245 * Because the pagedvn pager can't handle zero fill 246 * of the last data page if it's not page aligned we 247 * map the last page readvn. 248 */ 249 psize = trunc_page(*size); 250 } else { 251 psize = round_page(*size); 252 } 253 } else { 254 psize = *size; 255 } 256 257 if (psize > 0) { 258 NEW_VMCMD2(vcset, ph->p_align < PAGE_SIZE ? 259 vmcmd_map_readvn : vmcmd_map_pagedvn, psize, *addr, vp, 260 offset, *prot, flags); 261 } 262 if (psize < *size) { 263 NEW_VMCMD2(vcset, vmcmd_map_readvn, *size - psize, 264 *addr + psize, vp, offset + psize, *prot, 265 psize > 0 ? flags & VMCMD_RELATIVE : flags); 266 } 267 268 /* 269 * Check if we need to extend the size of the segment 270 */ 271 rm = round_page(*addr + msize); 272 rf = round_page(*addr + *size); 273 274 if (rm != rf) { 275 NEW_VMCMD2(vcset, vmcmd_map_zero, rm - rf, rf, NULLVP, 276 0, *prot, flags & VMCMD_RELATIVE); 277 *size = msize; 278 } 279} 280 281/* 282 * elf_load_file(): 283 * 284 * Load a file (interpreter/library) pointed to by path 285 * [stolen from coff_load_shlib()]. Made slightly generic 286 * so it might be used externally. 287 */ 288int 289ELFNAME(load_file)(struct proc *p, struct exec_package *epp, char *path, 290 struct exec_vmcmd_set *vcset, u_long *entry, struct elf_args *ap, 291 Elf_Addr *last) 292{ 293 int error, i; 294 struct nameidata nd; 295 struct vnode *vp; 296 struct vattr attr; 297 Elf_Ehdr eh; 298 Elf_Phdr *ph = NULL; 299 Elf_Phdr *base_ph = NULL; 300 u_long phsize; 301 char *bp = NULL; 302 Elf_Addr addr = *last; 303 304 bp = path; 305 /* 306 * 1. open file 307 * 2. read filehdr 308 * 3. map text, data, and bss out of it using VM_* 309 */ 310 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, path, p); 311 if ((error = namei(&nd)) != 0) 312 return error; 313 vp = nd.ni_vp; 314 315 /* 316 * Similarly, if it's not marked as executable, or it's not a regular 317 * file, we don't allow it to be used. 318 */ 319 if (vp->v_type != VREG) { 320 error = EACCES; 321 goto badunlock; 322 } 323 if ((error = VOP_ACCESS(vp, VEXEC, p->p_ucred, p)) != 0) 324 goto badunlock; 325 326 /* get attributes */ 327 if ((error = VOP_GETATTR(vp, &attr, p->p_ucred, p)) != 0) 328 goto badunlock; 329 330 /* 331 * Check mount point. Though we're not trying to exec this binary, 332 * we will be executing code from it, so if the mount point 333 * disallows execution or set-id-ness, we punt or kill the set-id. 334 */ 335 if (vp->v_mount->mnt_flag & MNT_NOEXEC) { 336 error = EACCES; 337 goto badunlock; 338 } 339 if (vp->v_mount->mnt_flag & MNT_NOSUID) 340 epp->ep_vap->va_mode &= ~(S_ISUID | S_ISGID); 341 342#ifdef notyet /* XXX cgd 960926 */ 343 XXX cgd 960926: (maybe) VOP_OPEN it (and VOP_CLOSE in copyargs?) 344#endif 345 VOP_UNLOCK(vp, 0); 346 347 if ((error = exec_read_from(p, vp, 0, &eh, sizeof(eh))) != 0) 348 goto bad; 349 350 if ((error = ELFNAME(check_header)(&eh, ET_DYN)) != 0) 351 goto bad; 352 353 phsize = eh.e_phnum * sizeof(Elf_Phdr); 354 ph = (Elf_Phdr *)malloc(phsize, M_TEMP, M_WAITOK); 355 356 if ((error = exec_read_from(p, vp, eh.e_phoff, ph, phsize)) != 0) 357 goto bad; 358 359 /* 360 * Load all the necessary sections 361 */ 362 for (i = 0; i < eh.e_phnum; i++) { 363 u_long size = 0; 364 int prot = 0; 365 int flags; 366 367 switch (ph[i].p_type) { 368 case PT_LOAD: 369 if (base_ph == NULL) { 370 addr = *last; 371 flags = VMCMD_BASE; 372 } else { 373 addr = ph[i].p_vaddr - base_ph->p_vaddr; 374 flags = VMCMD_RELATIVE; 375 } 376 ELFNAME(load_psection)(vcset, vp, &ph[i], &addr, 377 &size, &prot, flags); 378 /* If entry is within this section it must be text */ 379 if (eh.e_entry >= ph[i].p_vaddr && 380 eh.e_entry < (ph[i].p_vaddr + size)) { 381 /* XXX */ 382 *entry = addr + eh.e_entry; 383#ifdef mips 384 *entry -= ph[i].p_vaddr; 385#endif 386 ap->arg_interp = addr; 387 } 388 if (base_ph == NULL) 389 base_ph = &ph[i]; 390 addr += size; 391 break; 392 393 case PT_DYNAMIC: 394 case PT_PHDR: 395 case PT_NOTE: 396 break; 397 398 default: 399 break; 400 } 401 } 402 403 free((char *)ph, M_TEMP); 404 *last = addr; 405 vrele(vp); 406 return 0; 407 408badunlock: 409 VOP_UNLOCK(vp, 0); 410 411bad: 412 if (ph != NULL) 413 free((char *)ph, M_TEMP); 414#ifdef notyet /* XXX cgd 960926 */ 415 (maybe) VOP_CLOSE it 416#endif 417 vrele(vp); 418 return error; 419} 420 421/* 422 * exec_elf_makecmds(): Prepare an Elf binary's exec package 423 * 424 * First, set of the various offsets/lengths in the exec package. 425 * 426 * Then, mark the text image busy (so it can be demand paged) or error 427 * out if this is not possible. Finally, set up vmcmds for the 428 * text, data, bss, and stack segments. 429 */ 430int 431ELFNAME2(exec,makecmds)(struct proc *p, struct exec_package *epp) 432{ 433 Elf_Ehdr *eh = epp->ep_hdr; 434 Elf_Phdr *ph, *pp; 435 Elf_Addr phdr = 0, pos = 0; 436 int error, i, nload; 437 char *interp = NULL; 438 u_long phsize; 439 440 if (epp->ep_hdrvalid < sizeof(Elf_Ehdr)) 441 return ENOEXEC; 442 443 /* 444 * XXX allow for executing shared objects. It seems silly 445 * but other ELF-based systems allow it as well. 446 */ 447 if (ELFNAME(check_header)(eh, ET_EXEC) != 0 && 448 ELFNAME(check_header)(eh, ET_DYN) != 0) 449 return ENOEXEC; 450 451 /* 452 * check if vnode is in open for writing, because we want to 453 * demand-page out of it. if it is, don't do it, for various 454 * reasons 455 */ 456 if (epp->ep_vp->v_writecount != 0) { 457#ifdef DIAGNOSTIC 458 if (epp->ep_vp->v_flag & VTEXT) 459 panic("exec: a VTEXT vnode has writecount != 0\n"); 460#endif 461 return ETXTBSY; 462 } 463 /* 464 * Allocate space to hold all the program headers, and read them 465 * from the file 466 */ 467 phsize = eh->e_phnum * sizeof(Elf_Phdr); 468 ph = (Elf_Phdr *)malloc(phsize, M_TEMP, M_WAITOK); 469 470 if ((error = exec_read_from(p, epp->ep_vp, eh->e_phoff, ph, phsize)) != 471 0) 472 goto bad; 473 474 epp->ep_taddr = epp->ep_tsize = ELFDEFNNAME(NO_ADDR); 475 epp->ep_daddr = epp->ep_dsize = ELFDEFNNAME(NO_ADDR); 476 477 MALLOC(interp, char *, MAXPATHLEN, M_TEMP, M_WAITOK); 478 interp[0] = '\0'; 479 480 for (i = 0; i < eh->e_phnum; i++) { 481 pp = &ph[i]; 482 if (pp->p_type == PT_INTERP) { 483 if (pp->p_filesz >= MAXPATHLEN) 484 goto bad; 485 if ((error = exec_read_from(p, epp->ep_vp, 486 pp->p_offset, interp, pp->p_filesz)) != 0) 487 goto bad; 488 break; 489 } 490 } 491 492 /* 493 * On the same architecture, we may be emulating different systems. 494 * See which one will accept this executable. This currently only 495 * applies to SVR4, and IBCS2 on the i386 and Linux on the i386 496 * and the Alpha. 497 * 498 * Probe functions would normally see if the interpreter (if any) 499 * exists. Emulation packages may possibly replace the interpreter in 500 * interp[] with a changed path (/emul/xxx/<path>). 501 */ 502 if (!epp->ep_esch->u.elf_probe_func) { 503 pos = ELFDEFNNAME(NO_ADDR); 504 } else { 505 vaddr_t startp = 0; 506 507 error = (*epp->ep_esch->u.elf_probe_func)(p, epp, eh, interp, 508 &startp); 509 pos = (Elf_Addr)startp; 510 if (error) 511 goto bad; 512 } 513 514 /* 515 * Load all the necessary sections 516 */ 517 for (i = nload = 0; i < eh->e_phnum; i++) { 518 Elf_Addr addr = ELFDEFNNAME(NO_ADDR); 519 u_long size = 0; 520 int prot = 0; 521 522 pp = &ph[i]; 523 524 switch (ph[i].p_type) { 525 case PT_LOAD: 526 /* 527 * XXX 528 * Can handle only 2 sections: text and data 529 */ 530 if (nload++ == 2) 531 goto bad; 532 ELFNAME(load_psection)(&epp->ep_vmcmds, epp->ep_vp, 533 &ph[i], &addr, &size, &prot, 0); 534 535 /* 536 * Decide whether it's text or data by looking 537 * at the entry point. 538 */ 539 if (eh->e_entry >= addr && 540 eh->e_entry < (addr + size)) { 541 epp->ep_taddr = addr; 542 epp->ep_tsize = size; 543 if (epp->ep_daddr == ELFDEFNNAME(NO_ADDR)) { 544 epp->ep_daddr = addr; 545 epp->ep_dsize = size; 546 } 547 } else { 548 epp->ep_daddr = addr; 549 epp->ep_dsize = size; 550 } 551 break; 552 553 case PT_SHLIB: 554 /* SCO has these sections. */ 555 case PT_INTERP: 556 /* Already did this one. */ 557 case PT_DYNAMIC: 558 case PT_NOTE: 559 break; 560 561 case PT_PHDR: 562 /* Note address of program headers (in text segment) */ 563 phdr = pp->p_vaddr; 564 break; 565 566 default: 567 /* 568 * Not fatal; we don't need to understand everything. 569 */ 570 break; 571 } 572 } 573 574 /* this breaks on, e.g., OpenBSD-compatible mips shared binaries. */ 575#ifndef ELF_INTERP_NON_RELOCATABLE 576 /* 577 * If no position to load the interpreter was set by a probe 578 * function, pick the same address that a non-fixed mmap(0, ..) 579 * would (i.e. something safely out of the way). 580 */ 581 if (pos == ELFDEFNNAME(NO_ADDR)) 582 pos = round_page(epp->ep_daddr + MAXDSIZ); 583#endif /* !ELF_INTERP_NON_RELOCATABLE */ 584 585 /* 586 * Check if we found a dynamically linked binary and arrange to load 587 * it's interpreter 588 */ 589 if (interp[0]) { 590 struct elf_args *ap; 591 592 MALLOC(ap, struct elf_args *, sizeof(struct elf_args), 593 M_TEMP, M_WAITOK); 594 if ((error = ELFNAME(load_file)(p, epp, interp, 595 &epp->ep_vmcmds, &epp->ep_entry, ap, &pos)) != 0) { 596 FREE((char *)ap, M_TEMP); 597 goto bad; 598 } 599 pos += phsize; 600 ap->arg_phaddr = phdr; 601 602 ap->arg_phentsize = eh->e_phentsize; 603 ap->arg_phnum = eh->e_phnum; 604 ap->arg_entry = eh->e_entry; 605 606 epp->ep_emul_arg = ap; 607 } else 608 epp->ep_entry = eh->e_entry; 609 610#ifdef ELF_MAP_PAGE_ZERO 611 /* Dell SVR4 maps page zero, yeuch! */ 612 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, PAGE_SIZE, 0, 613 epp->ep_vp, 0, VM_PROT_READ); 614#endif 615 FREE(interp, M_TEMP); 616 free((char *)ph, M_TEMP); 617 epp->ep_vp->v_flag |= VTEXT; 618 return exec_elf_setup_stack(p, epp); 619 620bad: 621 if (interp) 622 FREE(interp, M_TEMP); 623 free((char *)ph, M_TEMP); 624 kill_vmcmds(&epp->ep_vmcmds); 625 return ENOEXEC; 626} 627 628int 629ELFNAME2(netbsd,signature)(struct proc *p, struct exec_package *epp, 630 Elf_Ehdr *eh) 631{ 632 size_t i; 633 Elf_Phdr *ph; 634 size_t phsize; 635 int error; 636 637 phsize = eh->e_phnum * sizeof(Elf_Phdr); 638 ph = (Elf_Phdr *)malloc(phsize, M_TEMP, M_WAITOK); 639 error = exec_read_from(p, epp->ep_vp, eh->e_phoff, ph, phsize); 640 if (error) 641 goto out; 642 643 for (i = 0; i < eh->e_phnum; i++) { 644 Elf_Phdr *ephp = &ph[i]; 645 Elf_Nhdr *np; 646 647 if (ephp->p_type != PT_NOTE || 648 ephp->p_filesz > 1024 || 649 ephp->p_filesz < sizeof(Elf_Nhdr) + ELF_NOTE_NETBSD_NAMESZ) 650 continue; 651 652 np = (Elf_Nhdr *)malloc(ephp->p_filesz, M_TEMP, M_WAITOK); 653 error = exec_read_from(p, epp->ep_vp, ephp->p_offset, np, 654 ephp->p_filesz); 655 if (error) 656 goto next; 657 658 if (np->n_type != ELF_NOTE_TYPE_NETBSD_TAG || 659 np->n_namesz != ELF_NOTE_NETBSD_NAMESZ || 660 np->n_descsz != ELF_NOTE_NETBSD_DESCSZ || 661 memcmp((caddr_t)(np + 1), ELF_NOTE_NETBSD_NAME, 662 ELF_NOTE_NETBSD_NAMESZ)) 663 goto next; 664 665 error = 0; 666 free(np, M_TEMP); 667 goto out; 668 669 next: 670 free(np, M_TEMP); 671 continue; 672 } 673 674 error = ENOEXEC; 675out: 676 free(ph, M_TEMP); 677 return (error); 678} 679 680int 681ELFNAME2(netbsd,probe)(struct proc *p, struct exec_package *epp, 682 void *eh, char *itp, vaddr_t *pos) 683{ 684 int error; 685 686 if ((error = ELFNAME2(netbsd,signature)(p, epp, eh)) != 0) 687 return error; 688 *pos = ELFDEFNNAME(NO_ADDR); 689 return 0; 690} 691