exec_elf32.c revision 1.70
1/* $NetBSD: exec_elf32.c,v 1.70 2002/01/28 22:15:55 thorpej 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 1.70 2002/01/28 22:15:55 thorpej 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 (ELF_EHDR_FLAGS_OK(eh) == 0) 196 return (ENOEXEC); 197 198 if (eh->e_type != type) 199 return (ENOEXEC); 200 201 if (eh->e_shnum > 512 || 202 eh->e_phnum > 128) 203 return (ENOEXEC); 204 205 return (0); 206} 207 208/* 209 * elf_load_psection(): 210 * 211 * Load a psection at the appropriate address 212 */ 213void 214ELFNAME(load_psection)(struct exec_vmcmd_set *vcset, struct vnode *vp, 215 const Elf_Phdr *ph, Elf_Addr *addr, u_long *size, int *prot, int flags) 216{ 217 u_long uaddr, msize, psize, rm, rf; 218 long diff, offset; 219 220 /* 221 * If the user specified an address, then we load there. 222 */ 223 if (*addr != ELFDEFNNAME(NO_ADDR)) { 224 if (ph->p_align > 1) { 225 *addr = ELF_TRUNC(*addr, ph->p_align); 226 uaddr = ELF_TRUNC(ph->p_vaddr, ph->p_align); 227 } else 228 uaddr = ph->p_vaddr; 229 diff = ph->p_vaddr - uaddr; 230 } else { 231 *addr = uaddr = ph->p_vaddr; 232 if (ph->p_align > 1) 233 *addr = ELF_TRUNC(uaddr, ph->p_align); 234 diff = uaddr - *addr; 235 } 236 237 *prot |= (ph->p_flags & PF_R) ? VM_PROT_READ : 0; 238 *prot |= (ph->p_flags & PF_W) ? VM_PROT_WRITE : 0; 239 *prot |= (ph->p_flags & PF_X) ? VM_PROT_EXECUTE : 0; 240 241 offset = ph->p_offset - diff; 242 *size = ph->p_filesz + diff; 243 msize = ph->p_memsz + diff; 244 245 if (ph->p_align >= PAGE_SIZE) { 246 if ((ph->p_flags & PF_W) != 0) { 247 /* 248 * Because the pagedvn pager can't handle zero fill 249 * of the last data page if it's not page aligned we 250 * map the last page readvn. 251 */ 252 psize = trunc_page(*size); 253 } else { 254 psize = round_page(*size); 255 } 256 } else { 257 psize = *size; 258 } 259 260 if (psize > 0) { 261 NEW_VMCMD2(vcset, ph->p_align < PAGE_SIZE ? 262 vmcmd_map_readvn : vmcmd_map_pagedvn, psize, *addr, vp, 263 offset, *prot, flags); 264 } 265 if (psize < *size) { 266 NEW_VMCMD2(vcset, vmcmd_map_readvn, *size - psize, 267 *addr + psize, vp, offset + psize, *prot, 268 psize > 0 ? flags & VMCMD_RELATIVE : flags); 269 } 270 271 /* 272 * Check if we need to extend the size of the segment 273 */ 274 rm = round_page(*addr + msize); 275 rf = round_page(*addr + *size); 276 277 if (rm != rf) { 278 NEW_VMCMD2(vcset, vmcmd_map_zero, rm - rf, rf, NULLVP, 279 0, *prot, flags & VMCMD_RELATIVE); 280 *size = msize; 281 } 282} 283 284/* 285 * elf_load_file(): 286 * 287 * Load a file (interpreter/library) pointed to by path 288 * [stolen from coff_load_shlib()]. Made slightly generic 289 * so it might be used externally. 290 */ 291int 292ELFNAME(load_file)(struct proc *p, struct exec_package *epp, char *path, 293 struct exec_vmcmd_set *vcset, u_long *entry, struct elf_args *ap, 294 Elf_Addr *last) 295{ 296 int error, i; 297 struct nameidata nd; 298 struct vnode *vp; 299 struct vattr attr; 300 Elf_Ehdr eh; 301 Elf_Phdr *ph = NULL; 302 Elf_Phdr *base_ph = NULL; 303 u_long phsize; 304 char *bp = NULL; 305 Elf_Addr addr = *last; 306 307 bp = path; 308 /* 309 * 1. open file 310 * 2. read filehdr 311 * 3. map text, data, and bss out of it using VM_* 312 */ 313 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, path, p); 314 if ((error = namei(&nd)) != 0) 315 return error; 316 vp = nd.ni_vp; 317 318 /* 319 * Similarly, if it's not marked as executable, or it's not a regular 320 * file, we don't allow it to be used. 321 */ 322 if (vp->v_type != VREG) { 323 error = EACCES; 324 goto badunlock; 325 } 326 if ((error = VOP_ACCESS(vp, VEXEC, p->p_ucred, p)) != 0) 327 goto badunlock; 328 329 /* get attributes */ 330 if ((error = VOP_GETATTR(vp, &attr, p->p_ucred, p)) != 0) 331 goto badunlock; 332 333 /* 334 * Check mount point. Though we're not trying to exec this binary, 335 * we will be executing code from it, so if the mount point 336 * disallows execution or set-id-ness, we punt or kill the set-id. 337 */ 338 if (vp->v_mount->mnt_flag & MNT_NOEXEC) { 339 error = EACCES; 340 goto badunlock; 341 } 342 if (vp->v_mount->mnt_flag & MNT_NOSUID) 343 epp->ep_vap->va_mode &= ~(S_ISUID | S_ISGID); 344 345#ifdef notyet /* XXX cgd 960926 */ 346 XXX cgd 960926: (maybe) VOP_OPEN it (and VOP_CLOSE in copyargs?) 347#endif 348 VOP_UNLOCK(vp, 0); 349 350 if ((error = exec_read_from(p, vp, 0, &eh, sizeof(eh))) != 0) 351 goto bad; 352 353 if ((error = ELFNAME(check_header)(&eh, ET_DYN)) != 0) 354 goto bad; 355 356 phsize = eh.e_phnum * sizeof(Elf_Phdr); 357 ph = (Elf_Phdr *)malloc(phsize, M_TEMP, M_WAITOK); 358 359 if ((error = exec_read_from(p, vp, eh.e_phoff, ph, phsize)) != 0) 360 goto bad; 361 362 /* 363 * Load all the necessary sections 364 */ 365 for (i = 0; i < eh.e_phnum; i++) { 366 u_long size = 0; 367 int prot = 0; 368 int flags; 369 370 switch (ph[i].p_type) { 371 case PT_LOAD: 372 if (base_ph == NULL) { 373 addr = *last; 374 flags = VMCMD_BASE; 375 } else { 376 addr = ph[i].p_vaddr - base_ph->p_vaddr; 377 flags = VMCMD_RELATIVE; 378 } 379 ELFNAME(load_psection)(vcset, vp, &ph[i], &addr, 380 &size, &prot, flags); 381 /* If entry is within this section it must be text */ 382 if (eh.e_entry >= ph[i].p_vaddr && 383 eh.e_entry < (ph[i].p_vaddr + size)) { 384 /* XXX */ 385 *entry = addr + eh.e_entry; 386#ifdef mips 387 *entry -= ph[i].p_vaddr; 388#endif 389 ap->arg_interp = addr; 390 } 391 if (base_ph == NULL) 392 base_ph = &ph[i]; 393 addr += size; 394 break; 395 396 case PT_DYNAMIC: 397 case PT_PHDR: 398 case PT_NOTE: 399 break; 400 401 default: 402 break; 403 } 404 } 405 406 free((char *)ph, M_TEMP); 407 *last = addr; 408 vrele(vp); 409 return 0; 410 411badunlock: 412 VOP_UNLOCK(vp, 0); 413 414bad: 415 if (ph != NULL) 416 free((char *)ph, M_TEMP); 417#ifdef notyet /* XXX cgd 960926 */ 418 (maybe) VOP_CLOSE it 419#endif 420 vrele(vp); 421 return error; 422} 423 424/* 425 * exec_elf_makecmds(): Prepare an Elf binary's exec package 426 * 427 * First, set of the various offsets/lengths in the exec package. 428 * 429 * Then, mark the text image busy (so it can be demand paged) or error 430 * out if this is not possible. Finally, set up vmcmds for the 431 * text, data, bss, and stack segments. 432 */ 433int 434ELFNAME2(exec,makecmds)(struct proc *p, struct exec_package *epp) 435{ 436 Elf_Ehdr *eh = epp->ep_hdr; 437 Elf_Phdr *ph, *pp; 438 Elf_Addr phdr = 0, pos = 0; 439 int error, i, nload; 440 char *interp = NULL; 441 u_long phsize; 442 443 if (epp->ep_hdrvalid < sizeof(Elf_Ehdr)) 444 return ENOEXEC; 445 446 /* 447 * XXX allow for executing shared objects. It seems silly 448 * but other ELF-based systems allow it as well. 449 */ 450 if (ELFNAME(check_header)(eh, ET_EXEC) != 0 && 451 ELFNAME(check_header)(eh, ET_DYN) != 0) 452 return ENOEXEC; 453 454 /* 455 * check if vnode is in open for writing, because we want to 456 * demand-page out of it. if it is, don't do it, for various 457 * reasons 458 */ 459 if (epp->ep_vp->v_writecount != 0) { 460#ifdef DIAGNOSTIC 461 if (epp->ep_vp->v_flag & VTEXT) 462 panic("exec: a VTEXT vnode has writecount != 0\n"); 463#endif 464 return ETXTBSY; 465 } 466 /* 467 * Allocate space to hold all the program headers, and read them 468 * from the file 469 */ 470 phsize = eh->e_phnum * sizeof(Elf_Phdr); 471 ph = (Elf_Phdr *)malloc(phsize, M_TEMP, M_WAITOK); 472 473 if ((error = exec_read_from(p, epp->ep_vp, eh->e_phoff, ph, phsize)) != 474 0) 475 goto bad; 476 477 epp->ep_taddr = epp->ep_tsize = ELFDEFNNAME(NO_ADDR); 478 epp->ep_daddr = epp->ep_dsize = ELFDEFNNAME(NO_ADDR); 479 480 MALLOC(interp, char *, MAXPATHLEN, M_TEMP, M_WAITOK); 481 interp[0] = '\0'; 482 483 for (i = 0; i < eh->e_phnum; i++) { 484 pp = &ph[i]; 485 if (pp->p_type == PT_INTERP) { 486 if (pp->p_filesz >= MAXPATHLEN) 487 goto bad; 488 if ((error = exec_read_from(p, epp->ep_vp, 489 pp->p_offset, interp, pp->p_filesz)) != 0) 490 goto bad; 491 break; 492 } 493 } 494 495 /* 496 * On the same architecture, we may be emulating different systems. 497 * See which one will accept this executable. This currently only 498 * applies to SVR4, and IBCS2 on the i386 and Linux on the i386 499 * and the Alpha. 500 * 501 * Probe functions would normally see if the interpreter (if any) 502 * exists. Emulation packages may possibly replace the interpreter in 503 * interp[] with a changed path (/emul/xxx/<path>). 504 */ 505 if (!epp->ep_esch->u.elf_probe_func) { 506 pos = ELFDEFNNAME(NO_ADDR); 507 } else { 508 vaddr_t startp = 0; 509 510 error = (*epp->ep_esch->u.elf_probe_func)(p, epp, eh, interp, 511 &startp); 512 pos = (Elf_Addr)startp; 513 if (error) 514 goto bad; 515 } 516 517 /* 518 * Load all the necessary sections 519 */ 520 for (i = nload = 0; i < eh->e_phnum; i++) { 521 Elf_Addr addr = ELFDEFNNAME(NO_ADDR); 522 u_long size = 0; 523 int prot = 0; 524 525 pp = &ph[i]; 526 527 switch (ph[i].p_type) { 528 case PT_LOAD: 529 /* 530 * XXX 531 * Can handle only 2 sections: text and data 532 */ 533 if (nload++ == 2) 534 goto bad; 535 ELFNAME(load_psection)(&epp->ep_vmcmds, epp->ep_vp, 536 &ph[i], &addr, &size, &prot, 0); 537 538 /* 539 * Decide whether it's text or data by looking 540 * at the entry point. 541 */ 542 if (eh->e_entry >= addr && 543 eh->e_entry < (addr + size)) { 544 epp->ep_taddr = addr; 545 epp->ep_tsize = size; 546 if (epp->ep_daddr == ELFDEFNNAME(NO_ADDR)) { 547 epp->ep_daddr = addr; 548 epp->ep_dsize = size; 549 } 550 } else { 551 epp->ep_daddr = addr; 552 epp->ep_dsize = size; 553 } 554 break; 555 556 case PT_SHLIB: 557 /* SCO has these sections. */ 558 case PT_INTERP: 559 /* Already did this one. */ 560 case PT_DYNAMIC: 561 case PT_NOTE: 562 break; 563 564 case PT_PHDR: 565 /* Note address of program headers (in text segment) */ 566 phdr = pp->p_vaddr; 567 break; 568 569 default: 570 /* 571 * Not fatal; we don't need to understand everything. 572 */ 573 break; 574 } 575 } 576 577 /* this breaks on, e.g., OpenBSD-compatible mips shared binaries. */ 578#ifndef ELF_INTERP_NON_RELOCATABLE 579 /* 580 * If no position to load the interpreter was set by a probe 581 * function, pick the same address that a non-fixed mmap(0, ..) 582 * would (i.e. something safely out of the way). 583 */ 584 if (pos == ELFDEFNNAME(NO_ADDR)) 585 pos = round_page(epp->ep_daddr + MAXDSIZ); 586#endif /* !ELF_INTERP_NON_RELOCATABLE */ 587 588 /* 589 * Check if we found a dynamically linked binary and arrange to load 590 * it's interpreter 591 */ 592 if (interp[0]) { 593 struct elf_args *ap; 594 595 MALLOC(ap, struct elf_args *, sizeof(struct elf_args), 596 M_TEMP, M_WAITOK); 597 if ((error = ELFNAME(load_file)(p, epp, interp, 598 &epp->ep_vmcmds, &epp->ep_entry, ap, &pos)) != 0) { 599 FREE((char *)ap, M_TEMP); 600 goto bad; 601 } 602 pos += phsize; 603 ap->arg_phaddr = phdr; 604 605 ap->arg_phentsize = eh->e_phentsize; 606 ap->arg_phnum = eh->e_phnum; 607 ap->arg_entry = eh->e_entry; 608 609 epp->ep_emul_arg = ap; 610 } else 611 epp->ep_entry = eh->e_entry; 612 613#ifdef ELF_MAP_PAGE_ZERO 614 /* Dell SVR4 maps page zero, yeuch! */ 615 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, PAGE_SIZE, 0, 616 epp->ep_vp, 0, VM_PROT_READ); 617#endif 618 FREE(interp, M_TEMP); 619 free((char *)ph, M_TEMP); 620 epp->ep_vp->v_flag |= VTEXT; 621 return exec_elf_setup_stack(p, epp); 622 623bad: 624 if (interp) 625 FREE(interp, M_TEMP); 626 free((char *)ph, M_TEMP); 627 kill_vmcmds(&epp->ep_vmcmds); 628 return ENOEXEC; 629} 630 631int 632ELFNAME2(netbsd,signature)(struct proc *p, struct exec_package *epp, 633 Elf_Ehdr *eh) 634{ 635 size_t i; 636 Elf_Phdr *ph; 637 size_t phsize; 638 int error; 639 640 phsize = eh->e_phnum * sizeof(Elf_Phdr); 641 ph = (Elf_Phdr *)malloc(phsize, M_TEMP, M_WAITOK); 642 error = exec_read_from(p, epp->ep_vp, eh->e_phoff, ph, phsize); 643 if (error) 644 goto out; 645 646 for (i = 0; i < eh->e_phnum; i++) { 647 Elf_Phdr *ephp = &ph[i]; 648 Elf_Nhdr *np; 649 650 if (ephp->p_type != PT_NOTE || 651 ephp->p_filesz > 1024 || 652 ephp->p_filesz < sizeof(Elf_Nhdr) + ELF_NOTE_NETBSD_NAMESZ) 653 continue; 654 655 np = (Elf_Nhdr *)malloc(ephp->p_filesz, M_TEMP, M_WAITOK); 656 error = exec_read_from(p, epp->ep_vp, ephp->p_offset, np, 657 ephp->p_filesz); 658 if (error) 659 goto next; 660 661 if (np->n_type != ELF_NOTE_TYPE_NETBSD_TAG || 662 np->n_namesz != ELF_NOTE_NETBSD_NAMESZ || 663 np->n_descsz != ELF_NOTE_NETBSD_DESCSZ || 664 memcmp((caddr_t)(np + 1), ELF_NOTE_NETBSD_NAME, 665 ELF_NOTE_NETBSD_NAMESZ)) 666 goto next; 667 668 error = 0; 669 free(np, M_TEMP); 670 goto out; 671 672 next: 673 free(np, M_TEMP); 674 continue; 675 } 676 677 error = ENOEXEC; 678out: 679 free(ph, M_TEMP); 680 return (error); 681} 682 683int 684ELFNAME2(netbsd,probe)(struct proc *p, struct exec_package *epp, 685 void *eh, char *itp, vaddr_t *pos) 686{ 687 int error; 688 689 if ((error = ELFNAME2(netbsd,signature)(p, epp, eh)) != 0) 690 return error; 691 *pos = ELFDEFNNAME(NO_ADDR); 692 return 0; 693} 694