1 /* $OpenBSD: exec_elf.c,v 1.74 2010/06/29 00:28:14 tedu 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/exec_olf.h> 82 #include <sys/file.h> 83 #include <sys/ptrace.h> 84 #include <sys/syscall.h> 85 #include <sys/signalvar.h> 86 #include <sys/stat.h> 87 88 #include <sys/mman.h> 89 #include <uvm/uvm_extern.h> 90 91 #include <machine/cpu.h> 92 #include <machine/reg.h> 93 #include <machine/exec.h> 94 95 #ifdef COMPAT_LINUX 96 #include <compat/linux/linux_exec.h> 97 #endif 98 99 #ifdef COMPAT_SVR4 100 #include <compat/svr4/svr4_exec.h> 101 #endif 102 103 #ifdef COMPAT_FREEBSD 104 #include <compat/freebsd/freebsd_exec.h> 105 #endif 106 107 struct ELFNAME(probe_entry) { 108 int (*func)(struct proc *, struct exec_package *, char *, 109 u_long *, u_int8_t *); 110 } ELFNAME(probes)[] = { 111 /* XXX - bogus, shouldn't be size independent.. */ 112 #ifdef COMPAT_FREEBSD 113 { freebsd_elf_probe }, 114 #endif 115 #ifdef COMPAT_LINUX 116 { linux_elf_probe }, 117 #endif 118 #ifdef COMPAT_SVR4 119 { svr4_elf_probe }, 120 #endif 121 { NULL } 122 }; 123 124 int ELFNAME(load_file)(struct proc *, char *, struct exec_package *, 125 struct elf_args *, Elf_Addr *); 126 int ELFNAME(check_header)(Elf_Ehdr *); 127 int ELFNAME(read_from)(struct proc *, struct vnode *, u_long, caddr_t, int); 128 void ELFNAME(load_psection)(struct exec_vmcmd_set *, struct vnode *, 129 Elf_Phdr *, Elf_Addr *, Elf_Addr *, int *, int); 130 int ELFNAMEEND(coredump)(struct proc *, void *); 131 132 extern char sigcode[], esigcode[]; 133 #ifdef SYSCALL_DEBUG 134 extern char *syscallnames[]; 135 #endif 136 137 /* round up and down to page boundaries. */ 138 #define ELF_ROUND(a, b) (((a) + (b) - 1) & ~((b) - 1)) 139 #define ELF_TRUNC(a, b) ((a) & ~((b) - 1)) 140 141 /* 142 * We limit the number of program headers to 32, this should 143 * be a reasonable limit for ELF, the most we have seen so far is 12 144 */ 145 #define ELF_MAX_VALID_PHDR 32 146 147 /* 148 * This is the basic elf emul. elf_probe_funcs may change to other emuls. 149 */ 150 struct emul ELFNAMEEND(emul) = { 151 "native", 152 NULL, 153 sendsig, 154 SYS_syscall, 155 SYS_MAXSYSCALL, 156 sysent, 157 #ifdef SYSCALL_DEBUG 158 syscallnames, 159 #else 160 NULL, 161 #endif 162 sizeof (AuxInfo) * ELF_AUX_ENTRIES, 163 ELFNAME(copyargs), 164 setregs, 165 ELFNAME2(exec,fixup), 166 ELFNAMEEND(coredump), 167 sigcode, 168 esigcode, 169 EMUL_ENABLED | EMUL_NATIVE, 170 }; 171 172 /* 173 * Copy arguments onto the stack in the normal way, but add some 174 * space for extra information in case of dynamic binding. 175 */ 176 void * 177 ELFNAME(copyargs)(struct exec_package *pack, struct ps_strings *arginfo, 178 void *stack, void *argp) 179 { 180 stack = copyargs(pack, arginfo, stack, argp); 181 if (!stack) 182 return (NULL); 183 184 /* 185 * Push space for extra arguments on the stack needed by 186 * dynamically linked binaries. 187 */ 188 if (pack->ep_interp != NULL) { 189 pack->ep_emul_argp = stack; 190 stack = (char *)stack + ELF_AUX_ENTRIES * sizeof (AuxInfo); 191 } 192 return (stack); 193 } 194 195 /* 196 * Check header for validity; return 0 for ok, ENOEXEC if error 197 */ 198 int 199 ELFNAME(check_header)(Elf_Ehdr *ehdr) 200 { 201 /* 202 * We need to check magic, class size, endianess, and version before 203 * we look at the rest of the Elf_Ehdr structure. These few elements 204 * are represented in a machine independent fashion. 205 */ 206 if (!IS_ELF(*ehdr) || 207 ehdr->e_ident[EI_CLASS] != ELF_TARG_CLASS || 208 ehdr->e_ident[EI_DATA] != ELF_TARG_DATA || 209 ehdr->e_ident[EI_VERSION] != ELF_TARG_VER) 210 return (ENOEXEC); 211 212 /* Now check the machine dependent header */ 213 if (ehdr->e_machine != ELF_TARG_MACH || 214 ehdr->e_version != ELF_TARG_VER) 215 return (ENOEXEC); 216 217 /* Don't allow an insane amount of sections. */ 218 if (ehdr->e_phnum > ELF_MAX_VALID_PHDR) 219 return (ENOEXEC); 220 221 return (0); 222 } 223 224 /* 225 * Load a psection at the appropriate address 226 */ 227 void 228 ELFNAME(load_psection)(struct exec_vmcmd_set *vcset, struct vnode *vp, 229 Elf_Phdr *ph, Elf_Addr *addr, Elf_Addr *size, int *prot, int flags) 230 { 231 u_long uaddr, msize, lsize, psize, rm, rf; 232 long diff, offset, bdiff; 233 Elf_Addr base; 234 235 /* 236 * If the user specified an address, then we load there. 237 */ 238 if (*addr != ELFDEFNNAME(NO_ADDR)) { 239 if (ph->p_align > 1) { 240 *addr = ELF_TRUNC(*addr, ph->p_align); 241 diff = ph->p_vaddr - ELF_TRUNC(ph->p_vaddr, ph->p_align); 242 /* page align vaddr */ 243 base = *addr + trunc_page(ph->p_vaddr) 244 - ELF_TRUNC(ph->p_vaddr, ph->p_align); 245 246 bdiff = ph->p_vaddr - trunc_page(ph->p_vaddr); 247 248 } else 249 diff = 0; 250 } else { 251 *addr = uaddr = ph->p_vaddr; 252 if (ph->p_align > 1) 253 *addr = ELF_TRUNC(uaddr, ph->p_align); 254 base = trunc_page(uaddr); 255 bdiff = uaddr - base; 256 diff = uaddr - *addr; 257 } 258 259 *prot |= (ph->p_flags & PF_R) ? VM_PROT_READ : 0; 260 *prot |= (ph->p_flags & PF_W) ? VM_PROT_WRITE : 0; 261 *prot |= (ph->p_flags & PF_X) ? VM_PROT_EXECUTE : 0; 262 263 msize = ph->p_memsz + diff; 264 offset = ph->p_offset - bdiff; 265 lsize = ph->p_filesz + bdiff; 266 psize = round_page(lsize); 267 268 /* 269 * Because the pagedvn pager can't handle zero fill of the last 270 * data page if it's not page aligned we map the last page readvn. 271 */ 272 if (ph->p_flags & PF_W) { 273 psize = trunc_page(lsize); 274 if (psize > 0) 275 NEW_VMCMD2(vcset, vmcmd_map_pagedvn, psize, base, vp, 276 offset, *prot, flags); 277 if (psize != lsize) { 278 NEW_VMCMD2(vcset, vmcmd_map_readvn, lsize - psize, 279 base + psize, vp, offset + psize, *prot, flags); 280 } 281 } else { 282 NEW_VMCMD2(vcset, vmcmd_map_pagedvn, psize, base, vp, offset, 283 *prot, flags); 284 } 285 286 /* 287 * Check if we need to extend the size of the segment 288 */ 289 rm = round_page(*addr + ph->p_memsz + diff); 290 rf = round_page(*addr + ph->p_filesz + diff); 291 292 if (rm != rf) { 293 NEW_VMCMD2(vcset, vmcmd_map_zero, rm - rf, rf, NULLVP, 0, 294 *prot, flags); 295 } 296 *size = msize; 297 } 298 299 /* 300 * Read from vnode into buffer at offset. 301 */ 302 int 303 ELFNAME(read_from)(struct proc *p, struct vnode *vp, u_long off, caddr_t buf, 304 int size) 305 { 306 int error; 307 size_t resid; 308 309 if ((error = vn_rdwr(UIO_READ, vp, buf, size, off, UIO_SYSSPACE, 310 0, p->p_ucred, &resid, p)) != 0) 311 return error; 312 /* 313 * See if we got all of it 314 */ 315 if (resid != 0) 316 return (ENOEXEC); 317 return (0); 318 } 319 320 /* 321 * Load a file (interpreter/library) pointed to by path [stolen from 322 * coff_load_shlib()]. Made slightly generic so it might be used externally. 323 */ 324 int 325 ELFNAME(load_file)(struct proc *p, char *path, struct exec_package *epp, 326 struct elf_args *ap, Elf_Addr *last) 327 { 328 int error, i; 329 struct nameidata nd; 330 Elf_Ehdr eh; 331 Elf_Phdr *ph = NULL; 332 u_long phsize; 333 Elf_Addr addr; 334 struct vnode *vp; 335 Elf_Phdr *base_ph = NULL; 336 struct interp_ld_sec { 337 Elf_Addr vaddr; 338 u_long memsz; 339 } loadmap[ELF_MAX_VALID_PHDR]; 340 int nload, idx = 0; 341 Elf_Addr pos = *last; 342 int file_align; 343 344 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, path, p); 345 if ((error = namei(&nd)) != 0) { 346 return (error); 347 } 348 vp = nd.ni_vp; 349 if (vp->v_type != VREG) { 350 error = EACCES; 351 goto bad; 352 } 353 if ((error = VOP_GETATTR(vp, epp->ep_vap, p->p_ucred, p)) != 0) 354 goto bad; 355 if (vp->v_mount->mnt_flag & MNT_NOEXEC) { 356 error = EACCES; 357 goto bad; 358 } 359 if ((error = VOP_ACCESS(vp, VREAD, p->p_ucred, p)) != 0) 360 goto bad1; 361 if ((error = ELFNAME(read_from)(p, nd.ni_vp, 0, 362 (caddr_t)&eh, sizeof(eh))) != 0) 363 goto bad1; 364 365 if (ELFNAME(check_header)(&eh) || eh.e_type != ET_DYN) { 366 error = ENOEXEC; 367 goto bad1; 368 } 369 370 phsize = eh.e_phnum * sizeof(Elf_Phdr); 371 ph = malloc(phsize, M_TEMP, M_WAITOK); 372 373 if ((error = ELFNAME(read_from)(p, nd.ni_vp, eh.e_phoff, (caddr_t)ph, 374 phsize)) != 0) 375 goto bad1; 376 377 for (i = 0; i < eh.e_phnum; i++) { 378 if (ph[i].p_type == PT_LOAD) { 379 loadmap[idx].vaddr = trunc_page(ph[i].p_vaddr); 380 loadmap[idx].memsz = round_page (ph[i].p_vaddr + 381 ph[i].p_memsz - loadmap[idx].vaddr); 382 file_align = ph[i].p_align; 383 idx++; 384 } 385 } 386 nload = idx; 387 388 /* 389 * If no position to load the interpreter was set by a probe 390 * function, pick the same address that a non-fixed mmap(0, ..) 391 * would (i.e. something safely out of the way). 392 */ 393 if (pos == ELFDEFNNAME(NO_ADDR)) { 394 pos = uvm_map_hint(p, VM_PROT_EXECUTE); 395 } 396 397 pos = ELF_ROUND(pos, file_align); 398 *last = epp->ep_interp_pos = pos; 399 for (i = 0; i < nload;/**/) { 400 vaddr_t addr; 401 struct uvm_object *uobj; 402 off_t uoff; 403 size_t size; 404 405 #ifdef this_needs_fixing 406 if (i == 0) { 407 uobj = &vp->v_uvm.u_obj; 408 /* need to fix uoff */ 409 } else { 410 #endif 411 uobj = NULL; 412 uoff = 0; 413 #ifdef this_needs_fixing 414 } 415 #endif 416 417 addr = trunc_page(pos + loadmap[i].vaddr); 418 size = round_page(addr + loadmap[i].memsz) - addr; 419 420 /* CRAP - map_findspace does not avoid daddr+MAXDSIZ */ 421 if ((addr + size > (vaddr_t)p->p_vmspace->vm_daddr) && 422 (addr < (vaddr_t)p->p_vmspace->vm_daddr + MAXDSIZ)) 423 addr = round_page((vaddr_t)p->p_vmspace->vm_daddr + 424 MAXDSIZ); 425 426 vm_map_lock(&p->p_vmspace->vm_map); 427 if (uvm_map_findspace(&p->p_vmspace->vm_map, addr, size, 428 &addr, uobj, uoff, 0, UVM_FLAG_FIXED) == NULL) { 429 if (uvm_map_findspace(&p->p_vmspace->vm_map, addr, size, 430 &addr, uobj, uoff, 0, 0) == NULL) { 431 error = ENOMEM; /* XXX */ 432 vm_map_unlock(&p->p_vmspace->vm_map); 433 goto bad1; 434 } 435 } 436 vm_map_unlock(&p->p_vmspace->vm_map); 437 if (addr != pos + loadmap[i].vaddr) { 438 /* base changed. */ 439 pos = addr - trunc_page(loadmap[i].vaddr); 440 pos = ELF_ROUND(pos,file_align); 441 epp->ep_interp_pos = *last = pos; 442 i = 0; 443 continue; 444 } 445 446 i++; 447 } 448 449 /* 450 * Load all the necessary sections 451 */ 452 for (i = 0; i < eh.e_phnum; i++) { 453 Elf_Addr size = 0; 454 int prot = 0; 455 int flags; 456 457 switch (ph[i].p_type) { 458 case PT_LOAD: 459 if (base_ph == NULL) { 460 flags = VMCMD_BASE; 461 addr = *last; 462 base_ph = &ph[i]; 463 } else { 464 flags = VMCMD_RELATIVE; 465 addr = ph[i].p_vaddr - base_ph->p_vaddr; 466 } 467 ELFNAME(load_psection)(&epp->ep_vmcmds, nd.ni_vp, 468 &ph[i], &addr, &size, &prot, flags); 469 /* If entry is within this section it must be text */ 470 if (eh.e_entry >= ph[i].p_vaddr && 471 eh.e_entry < (ph[i].p_vaddr + size)) { 472 epp->ep_entry = addr + eh.e_entry - 473 ELF_TRUNC(ph[i].p_vaddr,ph[i].p_align); 474 ap->arg_interp = addr; 475 } 476 addr += size; 477 break; 478 479 case PT_DYNAMIC: 480 case PT_PHDR: 481 case PT_NOTE: 482 break; 483 484 default: 485 break; 486 } 487 } 488 489 vn_marktext(nd.ni_vp); 490 491 bad1: 492 VOP_CLOSE(nd.ni_vp, FREAD, p->p_ucred, p); 493 bad: 494 if (ph != NULL) 495 free(ph, M_TEMP); 496 497 *last = addr; 498 vput(nd.ni_vp); 499 return (error); 500 } 501 502 /* 503 * Prepare an Elf binary's exec package 504 * 505 * First, set of the various offsets/lengths in the exec package. 506 * 507 * Then, mark the text image busy (so it can be demand paged) or error out if 508 * this is not possible. Finally, set up vmcmds for the text, data, bss, and 509 * stack segments. 510 */ 511 int 512 ELFNAME2(exec,makecmds)(struct proc *p, struct exec_package *epp) 513 { 514 Elf_Ehdr *eh = epp->ep_hdr; 515 Elf_Phdr *ph, *pp, *base_ph = NULL; 516 Elf_Addr phdr = 0, exe_base = 0; 517 int error, i; 518 char *interp = NULL; 519 u_long pos = 0, phsize; 520 u_int8_t os = OOS_NULL; 521 522 if (epp->ep_hdrvalid < sizeof(Elf_Ehdr)) 523 return (ENOEXEC); 524 525 if (ELFNAME(check_header)(eh) || 526 (eh->e_type != ET_EXEC && eh->e_type != ET_DYN)) 527 return (ENOEXEC); 528 529 /* 530 * check if vnode is in open for writing, because we want to demand- 531 * page out of it. if it is, don't do it, for various reasons. 532 */ 533 if (epp->ep_vp->v_writecount != 0) { 534 #ifdef DIAGNOSTIC 535 if (epp->ep_vp->v_flag & VTEXT) 536 panic("exec: a VTEXT vnode has writecount != 0"); 537 #endif 538 return (ETXTBSY); 539 } 540 /* 541 * Allocate space to hold all the program headers, and read them 542 * from the file 543 */ 544 phsize = eh->e_phnum * sizeof(Elf_Phdr); 545 ph = malloc(phsize, M_TEMP, M_WAITOK); 546 547 if ((error = ELFNAME(read_from)(p, epp->ep_vp, eh->e_phoff, (caddr_t)ph, 548 phsize)) != 0) 549 goto bad; 550 551 epp->ep_tsize = ELFDEFNNAME(NO_ADDR); 552 epp->ep_dsize = ELFDEFNNAME(NO_ADDR); 553 554 for (i = 0, pp = ph; i < eh->e_phnum; i++, pp++) { 555 if (pp->p_type == PT_INTERP && !interp) { 556 if (pp->p_filesz >= MAXPATHLEN) 557 goto bad; 558 interp = pool_get(&namei_pool, PR_WAITOK); 559 if ((error = ELFNAME(read_from)(p, epp->ep_vp, 560 pp->p_offset, interp, pp->p_filesz)) != 0) { 561 goto bad; 562 } 563 } else if (pp->p_type == PT_LOAD) { 564 if (base_ph == NULL) 565 base_ph = pp; 566 } 567 } 568 569 if (eh->e_type == ET_DYN) { 570 /* need an interpreter and load sections for PIE */ 571 if (interp == NULL || base_ph == NULL) 572 goto bad; 573 /* randomize exe_base for PIE */ 574 exe_base = uvm_map_pie(base_ph->p_align); 575 } 576 577 /* 578 * OK, we want a slightly different twist of the 579 * standard emulation package for "real" elf. 580 */ 581 epp->ep_emul = &ELFNAMEEND(emul); 582 pos = ELFDEFNNAME(NO_ADDR); 583 584 /* 585 * On the same architecture, we may be emulating different systems. 586 * See which one will accept this executable. 587 * 588 * Probe functions would normally see if the interpreter (if any) 589 * exists. Emulation packages may possibly replace the interpreter in 590 * *interp with a changed path (/emul/xxx/<path>), and also 591 * set the ep_emul field in the exec package structure. 592 */ 593 error = ENOEXEC; 594 p->p_os = OOS_OPENBSD; 595 #ifdef NATIVE_EXEC_ELF 596 if (ELFNAME(os_pt_note)(p, epp, epp->ep_hdr, "OpenBSD", 8, 4) == 0) { 597 goto native; 598 } 599 #endif 600 for (i = 0; ELFNAME(probes)[i].func != NULL && error; i++) { 601 error = (*ELFNAME(probes)[i].func)(p, epp, interp, &pos, &os); 602 } 603 if (!error) 604 p->p_os = os; 605 #ifndef NATIVE_EXEC_ELF 606 else 607 goto bad; 608 #else 609 native: 610 #endif /* NATIVE_EXEC_ELF */ 611 612 /* 613 * Load all the necessary sections 614 */ 615 for (i = 0, pp = ph; i < eh->e_phnum; i++, pp++) { 616 Elf_Addr addr, size = 0; 617 int prot = 0; 618 int flags = 0; 619 620 switch (pp->p_type) { 621 case PT_LOAD: 622 if (exe_base != 0) { 623 if (pp == base_ph) { 624 flags = VMCMD_BASE; 625 addr = exe_base; 626 } else { 627 flags = VMCMD_RELATIVE; 628 addr = pp->p_vaddr - base_ph->p_vaddr; 629 } 630 } else 631 addr = ELFDEFNNAME(NO_ADDR); 632 633 /* 634 * Calculates size of text and data segments 635 * by starting at first and going to end of last. 636 * 'rwx' sections are treated as data. 637 * this is correct for BSS_PLT, but may not be 638 * for DATA_PLT, is fine for TEXT_PLT. 639 */ 640 ELFNAME(load_psection)(&epp->ep_vmcmds, epp->ep_vp, 641 pp, &addr, &size, &prot, flags); 642 643 /* 644 * Update exe_base in case alignment was off. 645 * For PIE, addr is relative to exe_base so 646 * adjust it (non PIE exe_base is 0 so no change). 647 */ 648 if (flags == VMCMD_BASE) 649 exe_base = addr; 650 else 651 addr += exe_base; 652 653 /* 654 * Decide whether it's text or data by looking 655 * at the protection of the section 656 */ 657 if (prot & VM_PROT_WRITE) { 658 /* data section */ 659 if (epp->ep_dsize == ELFDEFNNAME(NO_ADDR)) { 660 epp->ep_daddr = addr; 661 epp->ep_dsize = size; 662 } else { 663 if (addr < epp->ep_daddr) { 664 epp->ep_dsize = 665 epp->ep_dsize + 666 epp->ep_daddr - 667 addr; 668 epp->ep_daddr = addr; 669 } else 670 epp->ep_dsize = addr+size - 671 epp->ep_daddr; 672 } 673 } else if (prot & VM_PROT_EXECUTE) { 674 /* text section */ 675 if (epp->ep_tsize == ELFDEFNNAME(NO_ADDR)) { 676 epp->ep_taddr = addr; 677 epp->ep_tsize = size; 678 } else { 679 if (addr < epp->ep_taddr) { 680 epp->ep_tsize = 681 epp->ep_tsize + 682 epp->ep_taddr - 683 addr; 684 epp->ep_taddr = addr; 685 } else 686 epp->ep_tsize = addr+size - 687 epp->ep_taddr; 688 } 689 } 690 break; 691 692 case PT_SHLIB: 693 error = ENOEXEC; 694 goto bad; 695 696 case PT_INTERP: 697 /* Already did this one */ 698 case PT_DYNAMIC: 699 case PT_NOTE: 700 break; 701 702 case PT_PHDR: 703 /* Note address of program headers (in text segment) */ 704 phdr = pp->p_vaddr; 705 break; 706 707 default: 708 /* 709 * Not fatal, we don't need to understand everything 710 * :-) 711 */ 712 break; 713 } 714 } 715 716 phdr += exe_base; 717 718 /* 719 * Strangely some linux programs may have all load sections marked 720 * writeable, in this case, textsize is not -1, but rather 0; 721 */ 722 if (epp->ep_tsize == ELFDEFNNAME(NO_ADDR)) 723 epp->ep_tsize = 0; 724 /* 725 * Another possibility is that it has all load sections marked 726 * read-only. Fake a zero-sized data segment right after the 727 * text segment. 728 */ 729 if (epp->ep_dsize == ELFDEFNNAME(NO_ADDR)) { 730 epp->ep_daddr = round_page(epp->ep_taddr + epp->ep_tsize); 731 epp->ep_dsize = 0; 732 } 733 734 epp->ep_interp = interp; 735 epp->ep_entry = eh->e_entry + exe_base; 736 737 /* 738 * Check if we found a dynamically linked binary and arrange to load 739 * its interpreter when the exec file is released. 740 */ 741 if (interp) { 742 struct elf_args *ap; 743 744 ap = malloc(sizeof(struct elf_args), M_TEMP, M_WAITOK); 745 746 ap->arg_phaddr = phdr; 747 ap->arg_phentsize = eh->e_phentsize; 748 ap->arg_phnum = eh->e_phnum; 749 ap->arg_entry = eh->e_entry + exe_base; 750 ap->arg_os = os; 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 #ifdef DIAGNOSTIC 1076 offset += psections[i].p_filesz; 1077 #endif 1078 } 1079 1080 out: 1081 return (error); 1082 #endif 1083 } 1084 1085 int 1086 ELFNAMEEND(coredump_countsegs)(struct proc *p, void *iocookie, 1087 struct uvm_coredump_state *us) 1088 { 1089 #ifndef SMALL_KERNEL 1090 struct countsegs_state *cs = us->cookie; 1091 1092 cs->npsections++; 1093 #endif 1094 return (0); 1095 } 1096 1097 int 1098 ELFNAMEEND(coredump_writeseghdrs)(struct proc *p, void *iocookie, 1099 struct uvm_coredump_state *us) 1100 { 1101 #ifndef SMALL_KERNEL 1102 struct writesegs_state *ws = us->cookie; 1103 Elf_Phdr phdr; 1104 vsize_t size, realsize; 1105 1106 size = us->end - us->start; 1107 realsize = us->realend - us->start; 1108 1109 phdr.p_type = PT_LOAD; 1110 phdr.p_offset = ws->secoff; 1111 phdr.p_vaddr = us->start; 1112 phdr.p_paddr = 0; 1113 phdr.p_filesz = realsize; 1114 phdr.p_memsz = size; 1115 phdr.p_flags = 0; 1116 if (us->prot & VM_PROT_READ) 1117 phdr.p_flags |= PF_R; 1118 if (us->prot & VM_PROT_WRITE) 1119 phdr.p_flags |= PF_W; 1120 if (us->prot & VM_PROT_EXECUTE) 1121 phdr.p_flags |= PF_X; 1122 phdr.p_align = PAGE_SIZE; 1123 1124 ws->secoff += phdr.p_filesz; 1125 *ws->psections++ = phdr; 1126 #endif 1127 1128 return (0); 1129 } 1130 1131 int 1132 ELFNAMEEND(coredump_notes)(struct proc *p, void *iocookie, size_t *sizep) 1133 { 1134 #ifndef SMALL_KERNEL 1135 struct ps_strings pss; 1136 struct iovec iov; 1137 struct uio uio; 1138 struct elfcore_procinfo cpi; 1139 Elf_Note nhdr; 1140 struct proc *q; 1141 size_t size, notesize; 1142 int error; 1143 1144 size = 0; 1145 1146 /* First, write an elfcore_procinfo. */ 1147 notesize = sizeof(nhdr) + elfround(sizeof("OpenBSD")) + 1148 elfround(sizeof(cpi)); 1149 if (iocookie) { 1150 bzero(&cpi, sizeof(cpi)); 1151 1152 cpi.cpi_version = ELFCORE_PROCINFO_VERSION; 1153 cpi.cpi_cpisize = sizeof(cpi); 1154 cpi.cpi_signo = p->p_sigacts->ps_sig; 1155 cpi.cpi_sigcode = p->p_sigacts->ps_code; 1156 1157 cpi.cpi_sigpend = p->p_siglist; 1158 cpi.cpi_sigmask = p->p_sigmask; 1159 cpi.cpi_sigignore = p->p_sigignore; 1160 cpi.cpi_sigcatch = p->p_sigcatch; 1161 1162 cpi.cpi_pid = p->p_pid; 1163 cpi.cpi_ppid = p->p_pptr->p_pid; 1164 cpi.cpi_pgrp = p->p_pgid; 1165 if (p->p_session->s_leader) 1166 cpi.cpi_sid = p->p_session->s_leader->p_pid; 1167 else 1168 cpi.cpi_sid = 0; 1169 1170 cpi.cpi_ruid = p->p_cred->p_ruid; 1171 cpi.cpi_euid = p->p_ucred->cr_uid; 1172 cpi.cpi_svuid = p->p_cred->p_svuid; 1173 1174 cpi.cpi_rgid = p->p_cred->p_rgid; 1175 cpi.cpi_egid = p->p_ucred->cr_gid; 1176 cpi.cpi_svgid = p->p_cred->p_svgid; 1177 1178 (void)strlcpy(cpi.cpi_name, p->p_comm, sizeof(cpi.cpi_name)); 1179 1180 nhdr.namesz = sizeof("OpenBSD"); 1181 nhdr.descsz = sizeof(cpi); 1182 nhdr.type = NT_OPENBSD_PROCINFO; 1183 1184 error = ELFNAMEEND(coredump_writenote)(p, iocookie, &nhdr, 1185 "OpenBSD", &cpi); 1186 if (error) 1187 return (error); 1188 } 1189 size += notesize; 1190 1191 /* Second, write an NT_OPENBSD_AUXV note. */ 1192 notesize = sizeof(nhdr) + elfround(sizeof("OpenBSD")) + 1193 elfround(p->p_emul->e_arglen * sizeof(char *)); 1194 if (iocookie) { 1195 iov.iov_base = &pss; 1196 iov.iov_len = sizeof(pss); 1197 uio.uio_iov = &iov; 1198 uio.uio_iovcnt = 1; 1199 uio.uio_offset = (off_t)(vaddr_t)PS_STRINGS; 1200 uio.uio_resid = sizeof(pss); 1201 uio.uio_segflg = UIO_SYSSPACE; 1202 uio.uio_rw = UIO_READ; 1203 uio.uio_procp = NULL; 1204 1205 error = uvm_io(&p->p_vmspace->vm_map, &uio, 0); 1206 if (error) 1207 return (error); 1208 1209 if (pss.ps_envstr == NULL) 1210 return (EIO); 1211 1212 nhdr.namesz = sizeof("OpenBSD"); 1213 nhdr.descsz = p->p_emul->e_arglen * sizeof(char *); 1214 nhdr.type = NT_OPENBSD_AUXV; 1215 1216 error = coredump_write(iocookie, UIO_SYSSPACE, 1217 &nhdr, sizeof(nhdr)); 1218 if (error) 1219 return (error); 1220 1221 error = coredump_write(iocookie, UIO_SYSSPACE, 1222 "OpenBSD", elfround(nhdr.namesz)); 1223 if (error) 1224 return (error); 1225 1226 error = coredump_write(iocookie, UIO_USERSPACE, 1227 pss.ps_envstr + pss.ps_nenvstr + 1, nhdr.descsz); 1228 if (error) 1229 return (error); 1230 } 1231 size += notesize; 1232 1233 #ifdef PT_WCOOKIE 1234 notesize = sizeof(nhdr) + elfround(sizeof("OpenBSD")) + 1235 elfround(sizeof(register_t)); 1236 if (iocookie) { 1237 register_t wcookie; 1238 1239 nhdr.namesz = sizeof("OpenBSD"); 1240 nhdr.descsz = sizeof(register_t); 1241 nhdr.type = NT_OPENBSD_WCOOKIE; 1242 1243 wcookie = process_get_wcookie(p); 1244 error = ELFNAMEEND(coredump_writenote)(p, iocookie, &nhdr, 1245 "OpenBSD", &wcookie); 1246 if (error) 1247 return (error); 1248 } 1249 size += notesize; 1250 #endif 1251 1252 /* 1253 * Now write the register info for the thread that caused the 1254 * coredump. 1255 */ 1256 error = ELFNAMEEND(coredump_note)(p, iocookie, ¬esize); 1257 if (error) 1258 return (error); 1259 size += notesize; 1260 1261 /* 1262 * Now, for each thread, write the register info and any other 1263 * per-thread notes. Since we're dumping core, we don't bother 1264 * locking. 1265 */ 1266 TAILQ_FOREACH(q, &p->p_p->ps_threads, p_thr_link) { 1267 if (q == p) /* we've taken care of this thread */ 1268 continue; 1269 error = ELFNAMEEND(coredump_note)(q, iocookie, ¬esize); 1270 if (error) 1271 return (error); 1272 size += notesize; 1273 } 1274 1275 *sizep = size; 1276 #endif 1277 return (0); 1278 } 1279 1280 int 1281 ELFNAMEEND(coredump_note)(struct proc *p, void *iocookie, size_t *sizep) 1282 { 1283 #ifndef SMALL_KERNEL 1284 Elf_Note nhdr; 1285 int size, notesize, error; 1286 int namesize; 1287 char name[64+ELFROUNDSIZE]; 1288 struct reg intreg; 1289 #ifdef PT_GETFPREGS 1290 struct fpreg freg; 1291 #endif 1292 1293 size = 0; 1294 1295 snprintf(name, sizeof(name)-ELFROUNDSIZE, "%s@%d", 1296 "OpenBSD", p->p_pid); 1297 namesize = strlen(name) + 1; 1298 memset(name + namesize, 0, elfround(namesize) - namesize); 1299 1300 notesize = sizeof(nhdr) + elfround(namesize) + elfround(sizeof(intreg)); 1301 if (iocookie) { 1302 error = process_read_regs(p, &intreg); 1303 if (error) 1304 return (error); 1305 1306 nhdr.namesz = namesize; 1307 nhdr.descsz = sizeof(intreg); 1308 nhdr.type = NT_OPENBSD_REGS; 1309 1310 error = ELFNAMEEND(coredump_writenote)(p, iocookie, &nhdr, 1311 name, &intreg); 1312 if (error) 1313 return (error); 1314 1315 } 1316 size += notesize; 1317 1318 #ifdef PT_GETFPREGS 1319 notesize = sizeof(nhdr) + elfround(namesize) + elfround(sizeof(freg)); 1320 if (iocookie) { 1321 error = process_read_fpregs(p, &freg); 1322 if (error) 1323 return (error); 1324 1325 nhdr.namesz = namesize; 1326 nhdr.descsz = sizeof(freg); 1327 nhdr.type = NT_OPENBSD_FPREGS; 1328 1329 error = ELFNAMEEND(coredump_writenote)(p, iocookie, &nhdr, 1330 name, &freg); 1331 if (error) 1332 return (error); 1333 } 1334 size += notesize; 1335 #endif 1336 1337 *sizep = size; 1338 /* XXX Add hook for machdep per-LWP notes. */ 1339 #endif 1340 return (0); 1341 } 1342 1343 int 1344 ELFNAMEEND(coredump_writenote)(struct proc *p, void *cookie, Elf_Note *nhdr, 1345 const char *name, void *data) 1346 { 1347 #ifdef SMALL_KERNEL 1348 return EPERM; 1349 #else 1350 int error; 1351 1352 error = coredump_write(cookie, UIO_SYSSPACE, nhdr, sizeof(*nhdr)); 1353 if (error) 1354 return error; 1355 1356 error = coredump_write(cookie, UIO_SYSSPACE, name, 1357 elfround(nhdr->namesz)); 1358 if (error) 1359 return error; 1360 1361 return coredump_write(cookie, UIO_SYSSPACE, data, nhdr->descsz); 1362 #endif 1363 } 1364