1 /* $OpenBSD: exec_elf.c,v 1.94 2014/01/21 01:48:44 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/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/reg.h> 91 #include <machine/exec.h> 92 93 #ifdef COMPAT_LINUX 94 #include <compat/linux/linux_exec.h> 95 #endif 96 97 struct ELFNAME(probe_entry) { 98 int (*func)(struct proc *, struct exec_package *, char *, 99 u_long *); 100 } ELFNAME(probes)[] = { 101 /* XXX - bogus, shouldn't be size independent.. */ 102 #ifdef COMPAT_LINUX 103 { linux_elf_probe }, 104 #endif 105 { NULL } 106 }; 107 108 int ELFNAME(load_file)(struct proc *, char *, struct exec_package *, 109 struct elf_args *, Elf_Addr *); 110 int ELFNAME(check_header)(Elf_Ehdr *); 111 int ELFNAME(read_from)(struct proc *, struct vnode *, u_long, caddr_t, int); 112 void ELFNAME(load_psection)(struct exec_vmcmd_set *, struct vnode *, 113 Elf_Phdr *, Elf_Addr *, Elf_Addr *, int *, int); 114 int ELFNAMEEND(coredump)(struct proc *, void *); 115 116 extern char sigcode[], esigcode[]; 117 #ifdef SYSCALL_DEBUG 118 extern char *syscallnames[]; 119 #endif 120 121 /* round up and down to page boundaries. */ 122 #define ELF_ROUND(a, b) (((a) + (b) - 1) & ~((b) - 1)) 123 #define ELF_TRUNC(a, b) ((a) & ~((b) - 1)) 124 125 /* 126 * We limit the number of program headers to 32, this should 127 * be a reasonable limit for ELF, the most we have seen so far is 12 128 */ 129 #define ELF_MAX_VALID_PHDR 32 130 131 /* Limit on total PT_OPENBSD_RANDOMIZE bytes. */ 132 #define ELF_RANDOMIZE_LIMIT 1024 133 134 /* 135 * This is the basic elf emul. elf_probe_funcs may change to other emuls. 136 */ 137 struct emul ELFNAMEEND(emul) = { 138 "native", 139 NULL, 140 sendsig, 141 SYS_syscall, 142 SYS_MAXSYSCALL, 143 sysent, 144 #ifdef SYSCALL_DEBUG 145 syscallnames, 146 #else 147 NULL, 148 #endif 149 (sizeof(AuxInfo) * ELF_AUX_ENTRIES / sizeof(char *)), 150 ELFNAME(copyargs), 151 setregs, 152 ELFNAME2(exec,fixup), 153 ELFNAMEEND(coredump), 154 sigcode, 155 esigcode, 156 EMUL_ENABLED | EMUL_NATIVE, 157 }; 158 159 /* 160 * Copy arguments onto the stack in the normal way, but add some 161 * space for extra information in case of dynamic binding. 162 */ 163 void * 164 ELFNAME(copyargs)(struct exec_package *pack, struct ps_strings *arginfo, 165 void *stack, void *argp) 166 { 167 stack = copyargs(pack, arginfo, stack, argp); 168 if (!stack) 169 return (NULL); 170 171 /* 172 * Push space for extra arguments on the stack needed by 173 * dynamically linked binaries. 174 */ 175 if (pack->ep_interp != NULL) { 176 pack->ep_emul_argp = stack; 177 stack = (char *)stack + ELF_AUX_ENTRIES * sizeof (AuxInfo); 178 } 179 return (stack); 180 } 181 182 /* 183 * Check header for validity; return 0 for ok, ENOEXEC if error 184 */ 185 int 186 ELFNAME(check_header)(Elf_Ehdr *ehdr) 187 { 188 /* 189 * We need to check magic, class size, endianess, and version before 190 * we look at the rest of the Elf_Ehdr structure. These few elements 191 * are represented in a machine independent fashion. 192 */ 193 if (!IS_ELF(*ehdr) || 194 ehdr->e_ident[EI_CLASS] != ELF_TARG_CLASS || 195 ehdr->e_ident[EI_DATA] != ELF_TARG_DATA || 196 ehdr->e_ident[EI_VERSION] != ELF_TARG_VER) 197 return (ENOEXEC); 198 199 /* Now check the machine dependent header */ 200 if (ehdr->e_machine != ELF_TARG_MACH || 201 ehdr->e_version != ELF_TARG_VER) 202 return (ENOEXEC); 203 204 /* Don't allow an insane amount of sections. */ 205 if (ehdr->e_phnum > ELF_MAX_VALID_PHDR) 206 return (ENOEXEC); 207 208 return (0); 209 } 210 211 /* 212 * Load a psection at the appropriate address 213 */ 214 void 215 ELFNAME(load_psection)(struct exec_vmcmd_set *vcset, struct vnode *vp, 216 Elf_Phdr *ph, Elf_Addr *addr, Elf_Addr *size, int *prot, int flags) 217 { 218 u_long uaddr, msize, lsize, psize, rm, rf; 219 long diff, offset, bdiff; 220 Elf_Addr base; 221 222 /* 223 * If the user specified an address, then we load there. 224 */ 225 if (*addr != ELFDEFNNAME(NO_ADDR)) { 226 if (ph->p_align > 1) { 227 *addr = ELF_TRUNC(*addr, ph->p_align); 228 diff = ph->p_vaddr - ELF_TRUNC(ph->p_vaddr, ph->p_align); 229 /* page align vaddr */ 230 base = *addr + trunc_page(ph->p_vaddr) 231 - ELF_TRUNC(ph->p_vaddr, ph->p_align); 232 233 bdiff = ph->p_vaddr - trunc_page(ph->p_vaddr); 234 235 } else 236 diff = 0; 237 } else { 238 *addr = uaddr = ph->p_vaddr; 239 if (ph->p_align > 1) 240 *addr = ELF_TRUNC(uaddr, ph->p_align); 241 base = trunc_page(uaddr); 242 bdiff = uaddr - base; 243 diff = uaddr - *addr; 244 } 245 246 *prot |= (ph->p_flags & PF_R) ? VM_PROT_READ : 0; 247 *prot |= (ph->p_flags & PF_W) ? VM_PROT_WRITE : 0; 248 *prot |= (ph->p_flags & PF_X) ? VM_PROT_EXECUTE : 0; 249 250 msize = ph->p_memsz + diff; 251 offset = ph->p_offset - bdiff; 252 lsize = ph->p_filesz + bdiff; 253 psize = round_page(lsize); 254 255 /* 256 * Because the pagedvn pager can't handle zero fill of the last 257 * data page if it's not page aligned we map the last page readvn. 258 */ 259 if (ph->p_flags & PF_W) { 260 psize = trunc_page(lsize); 261 if (psize > 0) 262 NEW_VMCMD2(vcset, vmcmd_map_pagedvn, psize, base, vp, 263 offset, *prot, flags); 264 if (psize != lsize) { 265 NEW_VMCMD2(vcset, vmcmd_map_readvn, lsize - psize, 266 base + psize, vp, offset + psize, *prot, flags); 267 } 268 } else { 269 NEW_VMCMD2(vcset, vmcmd_map_pagedvn, psize, base, vp, offset, 270 *prot, flags); 271 } 272 273 /* 274 * Check if we need to extend the size of the segment 275 */ 276 rm = round_page(*addr + ph->p_memsz + diff); 277 rf = round_page(*addr + ph->p_filesz + diff); 278 279 if (rm != rf) { 280 NEW_VMCMD2(vcset, vmcmd_map_zero, rm - rf, rf, NULLVP, 0, 281 *prot, flags); 282 } 283 *size = msize; 284 } 285 286 /* 287 * Read from vnode into buffer at offset. 288 */ 289 int 290 ELFNAME(read_from)(struct proc *p, struct vnode *vp, u_long off, caddr_t buf, 291 int size) 292 { 293 int error; 294 size_t resid; 295 296 if ((error = vn_rdwr(UIO_READ, vp, buf, size, off, UIO_SYSSPACE, 297 0, p->p_ucred, &resid, p)) != 0) 298 return error; 299 /* 300 * See if we got all of it 301 */ 302 if (resid != 0) 303 return (ENOEXEC); 304 return (0); 305 } 306 307 /* 308 * Load a file (interpreter/library) pointed to by path [stolen from 309 * coff_load_shlib()]. Made slightly generic so it might be used externally. 310 */ 311 int 312 ELFNAME(load_file)(struct proc *p, char *path, struct exec_package *epp, 313 struct elf_args *ap, Elf_Addr *last) 314 { 315 int error, i; 316 struct nameidata nd; 317 Elf_Ehdr eh; 318 Elf_Phdr *ph = NULL; 319 u_long phsize; 320 Elf_Addr addr; 321 struct vnode *vp; 322 Elf_Phdr *base_ph = NULL; 323 struct interp_ld_sec { 324 Elf_Addr vaddr; 325 u_long memsz; 326 } loadmap[ELF_MAX_VALID_PHDR]; 327 int nload, idx = 0; 328 Elf_Addr pos = *last; 329 int file_align; 330 int loop; 331 size_t randomizequota = ELF_RANDOMIZE_LIMIT; 332 333 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, path, p); 334 if ((error = namei(&nd)) != 0) { 335 return (error); 336 } 337 vp = nd.ni_vp; 338 if (vp->v_type != VREG) { 339 error = EACCES; 340 goto bad; 341 } 342 if ((error = VOP_GETATTR(vp, epp->ep_vap, p->p_ucred, p)) != 0) 343 goto bad; 344 if (vp->v_mount->mnt_flag & MNT_NOEXEC) { 345 error = EACCES; 346 goto bad; 347 } 348 if ((error = VOP_ACCESS(vp, VREAD, p->p_ucred, p)) != 0) 349 goto bad1; 350 if ((error = ELFNAME(read_from)(p, nd.ni_vp, 0, 351 (caddr_t)&eh, sizeof(eh))) != 0) 352 goto bad1; 353 354 if (ELFNAME(check_header)(&eh) || eh.e_type != ET_DYN) { 355 error = ENOEXEC; 356 goto bad1; 357 } 358 359 phsize = eh.e_phnum * sizeof(Elf_Phdr); 360 ph = malloc(phsize, M_TEMP, M_WAITOK); 361 362 if ((error = ELFNAME(read_from)(p, nd.ni_vp, eh.e_phoff, (caddr_t)ph, 363 phsize)) != 0) 364 goto bad1; 365 366 for (i = 0; i < eh.e_phnum; i++) { 367 if (ph[i].p_type == PT_LOAD) { 368 loadmap[idx].vaddr = trunc_page(ph[i].p_vaddr); 369 loadmap[idx].memsz = round_page (ph[i].p_vaddr + 370 ph[i].p_memsz - loadmap[idx].vaddr); 371 file_align = ph[i].p_align; 372 idx++; 373 } 374 } 375 nload = idx; 376 377 /* 378 * If no position to load the interpreter was set by a probe 379 * function, pick the same address that a non-fixed mmap(0, ..) 380 * would (i.e. something safely out of the way). 381 */ 382 if (pos == ELFDEFNNAME(NO_ADDR)) { 383 pos = uvm_map_hint(p->p_vmspace, VM_PROT_EXECUTE); 384 } 385 386 pos = ELF_ROUND(pos, file_align); 387 *last = epp->ep_interp_pos = pos; 388 loop = 0; 389 for (i = 0; i < nload;/**/) { 390 vaddr_t addr; 391 struct uvm_object *uobj; 392 off_t uoff; 393 size_t size; 394 395 #ifdef this_needs_fixing 396 if (i == 0) { 397 uobj = &vp->v_uvm.u_obj; 398 /* need to fix uoff */ 399 } else { 400 #endif 401 uobj = NULL; 402 uoff = 0; 403 #ifdef this_needs_fixing 404 } 405 #endif 406 407 addr = trunc_page(pos + loadmap[i].vaddr); 408 size = round_page(addr + loadmap[i].memsz) - addr; 409 410 /* CRAP - map_findspace does not avoid daddr+BRKSIZ */ 411 if ((addr + size > (vaddr_t)p->p_vmspace->vm_daddr) && 412 (addr < (vaddr_t)p->p_vmspace->vm_daddr + BRKSIZ)) 413 addr = round_page((vaddr_t)p->p_vmspace->vm_daddr + 414 BRKSIZ); 415 416 if (uvm_map_mquery(&p->p_vmspace->vm_map, &addr, size, 417 (i == 0 ? uoff : UVM_UNKNOWN_OFFSET), 0) != 0) { 418 if (loop == 0) { 419 loop = 1; 420 i = 0; 421 *last = epp->ep_interp_pos = pos = 0; 422 continue; 423 } 424 error = ENOMEM; 425 goto bad1; 426 } 427 if (addr != pos + loadmap[i].vaddr) { 428 /* base changed. */ 429 pos = addr - trunc_page(loadmap[i].vaddr); 430 pos = ELF_ROUND(pos,file_align); 431 epp->ep_interp_pos = *last = pos; 432 i = 0; 433 continue; 434 } 435 436 i++; 437 } 438 439 /* 440 * Load all the necessary sections 441 */ 442 for (i = 0; i < eh.e_phnum; i++) { 443 Elf_Addr size = 0; 444 int prot = 0; 445 int flags; 446 447 switch (ph[i].p_type) { 448 case PT_LOAD: 449 if (base_ph == NULL) { 450 flags = VMCMD_BASE; 451 addr = *last; 452 base_ph = &ph[i]; 453 } else { 454 flags = VMCMD_RELATIVE; 455 addr = ph[i].p_vaddr - base_ph->p_vaddr; 456 } 457 ELFNAME(load_psection)(&epp->ep_vmcmds, nd.ni_vp, 458 &ph[i], &addr, &size, &prot, flags); 459 /* If entry is within this section it must be text */ 460 if (eh.e_entry >= ph[i].p_vaddr && 461 eh.e_entry < (ph[i].p_vaddr + size)) { 462 epp->ep_entry = addr + eh.e_entry - 463 ELF_TRUNC(ph[i].p_vaddr,ph[i].p_align); 464 ap->arg_interp = addr; 465 } 466 addr += size; 467 break; 468 469 case PT_DYNAMIC: 470 case PT_PHDR: 471 case PT_NOTE: 472 break; 473 474 case PT_OPENBSD_RANDOMIZE: 475 if (ph[i].p_memsz > randomizequota) { 476 error = ENOMEM; 477 goto bad1; 478 } 479 randomizequota -= ph[i].p_memsz; 480 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_randomize, 481 ph[i].p_memsz, ph[i].p_vaddr + pos, NULLVP, 0, 0); 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 free(ph, M_TEMP); 495 496 *last = addr; 497 vput(nd.ni_vp); 498 return (error); 499 } 500 501 /* 502 * Prepare an Elf binary's exec package 503 * 504 * First, set of the various offsets/lengths in the exec package. 505 * 506 * Then, mark the text image busy (so it can be demand paged) or error out if 507 * this is not possible. Finally, set up vmcmds for the text, data, bss, and 508 * stack segments. 509 */ 510 int 511 ELFNAME2(exec,makecmds)(struct proc *p, struct exec_package *epp) 512 { 513 Elf_Ehdr *eh = epp->ep_hdr; 514 Elf_Phdr *ph, *pp, *base_ph = NULL; 515 Elf_Addr phdr = 0, exe_base = 0; 516 int error, i; 517 char *interp = NULL; 518 u_long pos = 0, phsize; 519 size_t randomizequota = ELF_RANDOMIZE_LIMIT; 520 521 if (epp->ep_hdrvalid < sizeof(Elf_Ehdr)) 522 return (ENOEXEC); 523 524 if (ELFNAME(check_header)(eh) || 525 (eh->e_type != ET_EXEC && eh->e_type != ET_DYN)) 526 return (ENOEXEC); 527 528 /* 529 * check if vnode is in open for writing, because we want to demand- 530 * page out of it. if it is, don't do it, for various reasons. 531 */ 532 if (epp->ep_vp->v_writecount != 0) { 533 #ifdef DIAGNOSTIC 534 if (epp->ep_vp->v_flag & VTEXT) 535 panic("exec: a VTEXT vnode has writecount != 0"); 536 #endif 537 return (ETXTBSY); 538 } 539 /* 540 * Allocate space to hold all the program headers, and read them 541 * from the file 542 */ 543 phsize = eh->e_phnum * sizeof(Elf_Phdr); 544 ph = malloc(phsize, M_TEMP, M_WAITOK); 545 546 if ((error = ELFNAME(read_from)(p, epp->ep_vp, eh->e_phoff, (caddr_t)ph, 547 phsize)) != 0) 548 goto bad; 549 550 epp->ep_tsize = ELFDEFNNAME(NO_ADDR); 551 epp->ep_dsize = ELFDEFNNAME(NO_ADDR); 552 553 for (i = 0, pp = ph; i < eh->e_phnum; i++, pp++) { 554 if (pp->p_type == PT_INTERP && !interp) { 555 if (pp->p_filesz >= MAXPATHLEN) 556 goto bad; 557 interp = pool_get(&namei_pool, PR_WAITOK); 558 if ((error = ELFNAME(read_from)(p, epp->ep_vp, 559 pp->p_offset, interp, pp->p_filesz)) != 0) { 560 goto bad; 561 } 562 } else if (pp->p_type == PT_LOAD) { 563 if (base_ph == NULL) 564 base_ph = pp; 565 } 566 } 567 568 if (eh->e_type == ET_DYN) { 569 /* need an interpreter and load sections for PIE */ 570 if (interp == NULL || base_ph == NULL) 571 goto bad; 572 /* randomize exe_base for PIE */ 573 exe_base = uvm_map_pie(base_ph->p_align); 574 } 575 576 /* 577 * OK, we want a slightly different twist of the 578 * standard emulation package for "real" elf. 579 */ 580 epp->ep_emul = &ELFNAMEEND(emul); 581 pos = ELFDEFNNAME(NO_ADDR); 582 583 /* 584 * On the same architecture, we may be emulating different systems. 585 * See which one will accept this executable. 586 * 587 * Probe functions would normally see if the interpreter (if any) 588 * exists. Emulation packages may possibly replace the interpreter in 589 * *interp with a changed path (/emul/xxx/<path>), and also 590 * set the ep_emul field in the exec package structure. 591 */ 592 error = ENOEXEC; 593 if (eh->e_ident[EI_OSABI] != ELFOSABI_OPENBSD && 594 ELFNAME(os_pt_note)(p, epp, epp->ep_hdr, "OpenBSD", 8, 4) != 0) { 595 for (i = 0; ELFNAME(probes)[i].func != NULL && error; i++) 596 error = (*ELFNAME(probes)[i].func)(p, epp, interp, &pos); 597 if (error) 598 goto bad; 599 } 600 601 /* 602 * Load all the necessary sections 603 */ 604 for (i = 0, pp = ph; i < eh->e_phnum; i++, pp++) { 605 Elf_Addr addr, size = 0; 606 int prot = 0; 607 int flags = 0; 608 609 switch (pp->p_type) { 610 case PT_LOAD: 611 if (exe_base != 0) { 612 if (pp == base_ph) { 613 flags = VMCMD_BASE; 614 addr = exe_base; 615 } else { 616 flags = VMCMD_RELATIVE; 617 addr = pp->p_vaddr - base_ph->p_vaddr; 618 } 619 } else 620 addr = ELFDEFNNAME(NO_ADDR); 621 622 /* 623 * Calculates size of text and data segments 624 * by starting at first and going to end of last. 625 * 'rwx' sections are treated as data. 626 * this is correct for BSS_PLT, but may not be 627 * for DATA_PLT, is fine for TEXT_PLT. 628 */ 629 ELFNAME(load_psection)(&epp->ep_vmcmds, epp->ep_vp, 630 pp, &addr, &size, &prot, flags); 631 632 /* 633 * Update exe_base in case alignment was off. 634 * For PIE, addr is relative to exe_base so 635 * adjust it (non PIE exe_base is 0 so no change). 636 */ 637 if (flags == VMCMD_BASE) 638 exe_base = addr; 639 else 640 addr += exe_base; 641 642 /* 643 * Decide whether it's text or data by looking 644 * at the protection of the section 645 */ 646 if (prot & VM_PROT_WRITE) { 647 /* data section */ 648 if (epp->ep_dsize == ELFDEFNNAME(NO_ADDR)) { 649 epp->ep_daddr = addr; 650 epp->ep_dsize = size; 651 } else { 652 if (addr < epp->ep_daddr) { 653 epp->ep_dsize = 654 epp->ep_dsize + 655 epp->ep_daddr - 656 addr; 657 epp->ep_daddr = addr; 658 } else 659 epp->ep_dsize = addr+size - 660 epp->ep_daddr; 661 } 662 } else if (prot & VM_PROT_EXECUTE) { 663 /* text section */ 664 if (epp->ep_tsize == ELFDEFNNAME(NO_ADDR)) { 665 epp->ep_taddr = addr; 666 epp->ep_tsize = size; 667 } else { 668 if (addr < epp->ep_taddr) { 669 epp->ep_tsize = 670 epp->ep_tsize + 671 epp->ep_taddr - 672 addr; 673 epp->ep_taddr = addr; 674 } else 675 epp->ep_tsize = addr+size - 676 epp->ep_taddr; 677 } 678 } 679 break; 680 681 case PT_SHLIB: 682 error = ENOEXEC; 683 goto bad; 684 685 case PT_INTERP: 686 /* Already did this one */ 687 case PT_DYNAMIC: 688 case PT_NOTE: 689 break; 690 691 case PT_PHDR: 692 /* Note address of program headers (in text segment) */ 693 phdr = pp->p_vaddr; 694 break; 695 696 case PT_OPENBSD_RANDOMIZE: 697 if (ph[i].p_memsz > randomizequota) { 698 error = ENOMEM; 699 goto bad; 700 } 701 randomizequota -= ph[i].p_memsz; 702 NEW_VMCMD(&epp->ep_vmcmds, vmcmd_randomize, 703 ph[i].p_memsz, ph[i].p_vaddr + exe_base, NULLVP, 0, 0); 704 break; 705 706 default: 707 /* 708 * Not fatal, we don't need to understand everything 709 * :-) 710 */ 711 break; 712 } 713 } 714 715 phdr += exe_base; 716 717 /* 718 * Strangely some linux programs may have all load sections marked 719 * writeable, in this case, textsize is not -1, but rather 0; 720 */ 721 if (epp->ep_tsize == ELFDEFNNAME(NO_ADDR)) 722 epp->ep_tsize = 0; 723 /* 724 * Another possibility is that it has all load sections marked 725 * read-only. Fake a zero-sized data segment right after the 726 * text segment. 727 */ 728 if (epp->ep_dsize == ELFDEFNNAME(NO_ADDR)) { 729 epp->ep_daddr = round_page(epp->ep_taddr + epp->ep_tsize); 730 epp->ep_dsize = 0; 731 } 732 733 epp->ep_interp = interp; 734 epp->ep_entry = eh->e_entry + exe_base; 735 736 /* 737 * Check if we found a dynamically linked binary and arrange to load 738 * its interpreter when the exec file is released. 739 */ 740 if (interp) { 741 struct elf_args *ap; 742 743 ap = malloc(sizeof(struct elf_args), M_TEMP, M_WAITOK); 744 745 ap->arg_phaddr = phdr; 746 ap->arg_phentsize = eh->e_phentsize; 747 ap->arg_phnum = eh->e_phnum; 748 ap->arg_entry = eh->e_entry + exe_base; 749 750 epp->ep_emul_arg = ap; 751 epp->ep_interp_pos = pos; 752 } 753 754 free(ph, M_TEMP); 755 vn_marktext(epp->ep_vp); 756 return (exec_setup_stack(p, epp)); 757 758 bad: 759 if (interp) 760 pool_put(&namei_pool, interp); 761 free(ph, M_TEMP); 762 kill_vmcmds(&epp->ep_vmcmds); 763 return (ENOEXEC); 764 } 765 766 /* 767 * Phase II of load. It is now safe to load the interpreter. Info collected 768 * when loading the program is available for setup of the interpreter. 769 */ 770 int 771 ELFNAME2(exec,fixup)(struct proc *p, struct exec_package *epp) 772 { 773 char *interp; 774 int error; 775 struct elf_args *ap; 776 AuxInfo ai[ELF_AUX_ENTRIES], *a; 777 Elf_Addr pos = epp->ep_interp_pos; 778 779 if (epp->ep_interp == NULL) { 780 return (0); 781 } 782 783 interp = epp->ep_interp; 784 ap = epp->ep_emul_arg; 785 786 if ((error = ELFNAME(load_file)(p, interp, epp, ap, &pos)) != 0) { 787 free(ap, M_TEMP); 788 pool_put(&namei_pool, interp); 789 kill_vmcmds(&epp->ep_vmcmds); 790 return (error); 791 } 792 /* 793 * We have to do this ourselves... 794 */ 795 error = exec_process_vmcmds(p, epp); 796 797 /* 798 * Push extra arguments on the stack needed by dynamically 799 * linked binaries 800 */ 801 if (error == 0) { 802 a = ai; 803 804 a->au_id = AUX_phdr; 805 a->au_v = ap->arg_phaddr; 806 a++; 807 808 a->au_id = AUX_phent; 809 a->au_v = ap->arg_phentsize; 810 a++; 811 812 a->au_id = AUX_phnum; 813 a->au_v = ap->arg_phnum; 814 a++; 815 816 a->au_id = AUX_pagesz; 817 a->au_v = PAGE_SIZE; 818 a++; 819 820 a->au_id = AUX_base; 821 a->au_v = ap->arg_interp; 822 a++; 823 824 a->au_id = AUX_flags; 825 a->au_v = 0; 826 a++; 827 828 a->au_id = AUX_entry; 829 a->au_v = ap->arg_entry; 830 a++; 831 832 a->au_id = AUX_null; 833 a->au_v = 0; 834 a++; 835 836 error = copyout(ai, epp->ep_emul_argp, sizeof ai); 837 } 838 free(ap, M_TEMP); 839 pool_put(&namei_pool, interp); 840 return (error); 841 } 842 843 /* 844 * Older ELF binaries use EI_ABIVERSION (formerly EI_BRAND) to brand 845 * executables. Newer ELF binaries use EI_OSABI instead. 846 */ 847 char * 848 ELFNAME(check_brand)(Elf_Ehdr *eh) 849 { 850 if (eh->e_ident[EI_ABIVERSION] == '\0') 851 return (NULL); 852 return (&eh->e_ident[EI_ABIVERSION]); 853 } 854 855 int 856 ELFNAME(os_pt_note)(struct proc *p, struct exec_package *epp, Elf_Ehdr *eh, 857 char *os_name, size_t name_size, size_t desc_size) 858 { 859 Elf_Phdr *hph, *ph; 860 Elf_Note *np = NULL; 861 size_t phsize; 862 int error; 863 864 phsize = eh->e_phnum * sizeof(Elf_Phdr); 865 hph = malloc(phsize, M_TEMP, M_WAITOK); 866 if ((error = ELFNAME(read_from)(p, epp->ep_vp, eh->e_phoff, 867 (caddr_t)hph, phsize)) != 0) 868 goto out1; 869 870 for (ph = hph; ph < &hph[eh->e_phnum]; ph++) { 871 if (ph->p_type != PT_NOTE || 872 ph->p_filesz > 1024 || 873 ph->p_filesz < sizeof(Elf_Note) + name_size) 874 continue; 875 876 np = malloc(ph->p_filesz, M_TEMP, M_WAITOK); 877 if ((error = ELFNAME(read_from)(p, epp->ep_vp, ph->p_offset, 878 (caddr_t)np, ph->p_filesz)) != 0) 879 goto out2; 880 881 #if 0 882 if (np->type != ELF_NOTE_TYPE_OSVERSION) { 883 free(np, M_TEMP); 884 np = NULL; 885 continue; 886 } 887 #endif 888 889 /* Check the name and description sizes. */ 890 if (np->namesz != name_size || 891 np->descsz != desc_size) 892 goto out3; 893 894 if (memcmp((np + 1), os_name, name_size)) 895 goto out3; 896 897 /* XXX: We could check for the specific emulation here */ 898 /* All checks succeeded. */ 899 error = 0; 900 goto out2; 901 } 902 903 out3: 904 error = ENOEXEC; 905 out2: 906 free(np, M_TEMP); 907 out1: 908 free(hph, M_TEMP); 909 return error; 910 } 911 912 struct countsegs_state { 913 int npsections; 914 }; 915 916 int ELFNAMEEND(coredump_countsegs)(struct proc *, void *, 917 struct uvm_coredump_state *); 918 919 struct writesegs_state { 920 Elf_Phdr *psections; 921 off_t secoff; 922 }; 923 924 int ELFNAMEEND(coredump_writeseghdrs)(struct proc *, void *, 925 struct uvm_coredump_state *); 926 927 int ELFNAMEEND(coredump_notes)(struct proc *, void *, size_t *); 928 int ELFNAMEEND(coredump_note)(struct proc *, void *, size_t *); 929 int ELFNAMEEND(coredump_writenote)(struct proc *, void *, Elf_Note *, 930 const char *, void *); 931 932 #define ELFROUNDSIZE 4 /* XXX Should it be sizeof(Elf_Word)? */ 933 #define elfround(x) roundup((x), ELFROUNDSIZE) 934 935 int 936 ELFNAMEEND(coredump)(struct proc *p, void *cookie) 937 { 938 #ifdef SMALL_KERNEL 939 return EPERM; 940 #else 941 Elf_Ehdr ehdr; 942 Elf_Phdr phdr, *psections; 943 struct countsegs_state cs; 944 struct writesegs_state ws; 945 off_t notestart, secstart, offset; 946 size_t notesize; 947 int error, i; 948 949 psections = NULL; 950 /* 951 * We have to make a total of 3 passes across the map: 952 * 953 * 1. Count the number of map entries (the number of 954 * PT_LOAD sections). 955 * 956 * 2. Write the P-section headers. 957 * 958 * 3. Write the P-sections. 959 */ 960 961 /* Pass 1: count the entries. */ 962 cs.npsections = 0; 963 error = uvm_coredump_walkmap(p, NULL, 964 ELFNAMEEND(coredump_countsegs), &cs); 965 if (error) 966 goto out; 967 968 /* Count the PT_NOTE section. */ 969 cs.npsections++; 970 971 /* Get the size of the notes. */ 972 error = ELFNAMEEND(coredump_notes)(p, NULL, ¬esize); 973 if (error) 974 goto out; 975 976 memset(&ehdr, 0, sizeof(ehdr)); 977 memcpy(ehdr.e_ident, ELFMAG, SELFMAG); 978 ehdr.e_ident[EI_CLASS] = ELF_TARG_CLASS; 979 ehdr.e_ident[EI_DATA] = ELF_TARG_DATA; 980 ehdr.e_ident[EI_VERSION] = EV_CURRENT; 981 /* XXX Should be the OSABI/ABI version of the executable. */ 982 ehdr.e_ident[EI_OSABI] = ELFOSABI_SYSV; 983 ehdr.e_ident[EI_ABIVERSION] = 0; 984 ehdr.e_type = ET_CORE; 985 /* XXX This should be the e_machine of the executable. */ 986 ehdr.e_machine = ELF_TARG_MACH; 987 ehdr.e_version = EV_CURRENT; 988 ehdr.e_entry = 0; 989 ehdr.e_phoff = sizeof(ehdr); 990 ehdr.e_shoff = 0; 991 ehdr.e_flags = 0; 992 ehdr.e_ehsize = sizeof(ehdr); 993 ehdr.e_phentsize = sizeof(Elf_Phdr); 994 ehdr.e_phnum = cs.npsections; 995 ehdr.e_shentsize = 0; 996 ehdr.e_shnum = 0; 997 ehdr.e_shstrndx = 0; 998 999 /* Write out the ELF header. */ 1000 error = coredump_write(cookie, UIO_SYSSPACE, &ehdr, sizeof(ehdr)); 1001 if (error) 1002 goto out; 1003 1004 offset = sizeof(ehdr); 1005 1006 notestart = offset + sizeof(phdr) * cs.npsections; 1007 secstart = notestart + notesize; 1008 1009 psections = malloc(cs.npsections * sizeof(Elf_Phdr), 1010 M_TEMP, M_WAITOK|M_ZERO); 1011 1012 /* Pass 2: now write the P-section headers. */ 1013 ws.secoff = secstart; 1014 ws.psections = psections; 1015 error = uvm_coredump_walkmap(p, cookie, 1016 ELFNAMEEND(coredump_writeseghdrs), &ws); 1017 if (error) 1018 goto out; 1019 1020 /* Write out the PT_NOTE header. */ 1021 ws.psections->p_type = PT_NOTE; 1022 ws.psections->p_offset = notestart; 1023 ws.psections->p_vaddr = 0; 1024 ws.psections->p_paddr = 0; 1025 ws.psections->p_filesz = notesize; 1026 ws.psections->p_memsz = 0; 1027 ws.psections->p_flags = PF_R; 1028 ws.psections->p_align = ELFROUNDSIZE; 1029 1030 error = coredump_write(cookie, UIO_SYSSPACE, psections, 1031 cs.npsections * sizeof(Elf_Phdr)); 1032 if (error) 1033 goto out; 1034 1035 #ifdef DIAGNOSTIC 1036 offset += cs.npsections * sizeof(Elf_Phdr); 1037 if (offset != notestart) 1038 panic("coredump: offset %lld != notestart %lld", 1039 (long long) offset, (long long) notestart); 1040 #endif 1041 1042 /* Write out the notes. */ 1043 error = ELFNAMEEND(coredump_notes)(p, cookie, ¬esize); 1044 if (error) 1045 goto out; 1046 1047 #ifdef DIAGNOSTIC 1048 offset += notesize; 1049 if (offset != secstart) 1050 panic("coredump: offset %lld != secstart %lld", 1051 (long long) offset, (long long) secstart); 1052 #endif 1053 1054 /* Pass 3: finally, write the sections themselves. */ 1055 for (i = 0; i < cs.npsections - 1; i++) { 1056 if (psections[i].p_filesz == 0) 1057 continue; 1058 1059 #ifdef DIAGNOSTIC 1060 if (offset != psections[i].p_offset) 1061 panic("coredump: offset %lld != p_offset[%d] %lld", 1062 (long long) offset, i, 1063 (long long) psections[i].p_filesz); 1064 #endif 1065 1066 error = coredump_write(cookie, UIO_USERSPACE, 1067 (void *)(vaddr_t)psections[i].p_vaddr, 1068 psections[i].p_filesz); 1069 if (error) 1070 goto out; 1071 1072 coredump_unmap(cookie, (vaddr_t)psections[i].p_vaddr, 1073 (vaddr_t)psections[i].p_vaddr + psections[i].p_filesz); 1074 1075 #ifdef DIAGNOSTIC 1076 offset += psections[i].p_filesz; 1077 #endif 1078 } 1079 1080 out: 1081 free(psections, M_TEMP); 1082 return (error); 1083 #endif 1084 } 1085 1086 int 1087 ELFNAMEEND(coredump_countsegs)(struct proc *p, void *iocookie, 1088 struct uvm_coredump_state *us) 1089 { 1090 #ifndef SMALL_KERNEL 1091 struct countsegs_state *cs = us->cookie; 1092 1093 cs->npsections++; 1094 #endif 1095 return (0); 1096 } 1097 1098 int 1099 ELFNAMEEND(coredump_writeseghdrs)(struct proc *p, void *iocookie, 1100 struct uvm_coredump_state *us) 1101 { 1102 #ifndef SMALL_KERNEL 1103 struct writesegs_state *ws = us->cookie; 1104 Elf_Phdr phdr; 1105 vsize_t size, realsize; 1106 1107 size = us->end - us->start; 1108 realsize = us->realend - us->start; 1109 1110 phdr.p_type = PT_LOAD; 1111 phdr.p_offset = ws->secoff; 1112 phdr.p_vaddr = us->start; 1113 phdr.p_paddr = 0; 1114 phdr.p_filesz = realsize; 1115 phdr.p_memsz = size; 1116 phdr.p_flags = 0; 1117 if (us->prot & VM_PROT_READ) 1118 phdr.p_flags |= PF_R; 1119 if (us->prot & VM_PROT_WRITE) 1120 phdr.p_flags |= PF_W; 1121 if (us->prot & VM_PROT_EXECUTE) 1122 phdr.p_flags |= PF_X; 1123 phdr.p_align = PAGE_SIZE; 1124 1125 ws->secoff += phdr.p_filesz; 1126 *ws->psections++ = phdr; 1127 #endif 1128 1129 return (0); 1130 } 1131 1132 int 1133 ELFNAMEEND(coredump_notes)(struct proc *p, void *iocookie, size_t *sizep) 1134 { 1135 #ifndef SMALL_KERNEL 1136 struct ps_strings pss; 1137 struct iovec iov; 1138 struct uio uio; 1139 struct elfcore_procinfo cpi; 1140 Elf_Note nhdr; 1141 struct process *pr = p->p_p; 1142 struct proc *q; 1143 size_t size, notesize; 1144 int error; 1145 1146 size = 0; 1147 1148 /* First, write an elfcore_procinfo. */ 1149 notesize = sizeof(nhdr) + elfround(sizeof("OpenBSD")) + 1150 elfround(sizeof(cpi)); 1151 if (iocookie) { 1152 memset(&cpi, 0, sizeof(cpi)); 1153 1154 cpi.cpi_version = ELFCORE_PROCINFO_VERSION; 1155 cpi.cpi_cpisize = sizeof(cpi); 1156 cpi.cpi_signo = p->p_sisig; 1157 cpi.cpi_sigcode = p->p_sicode; 1158 1159 cpi.cpi_sigpend = p->p_siglist; 1160 cpi.cpi_sigmask = p->p_sigmask; 1161 cpi.cpi_sigignore = p->p_sigacts->ps_sigignore; 1162 cpi.cpi_sigcatch = p->p_sigacts->ps_sigcatch; 1163 1164 cpi.cpi_pid = pr->ps_pid; 1165 cpi.cpi_ppid = pr->ps_pptr->ps_pid; 1166 cpi.cpi_pgrp = pr->ps_pgid; 1167 if (pr->ps_session->s_leader) 1168 cpi.cpi_sid = pr->ps_session->s_leader->ps_pid; 1169 else 1170 cpi.cpi_sid = 0; 1171 1172 cpi.cpi_ruid = p->p_cred->p_ruid; 1173 cpi.cpi_euid = p->p_ucred->cr_uid; 1174 cpi.cpi_svuid = p->p_cred->p_svuid; 1175 1176 cpi.cpi_rgid = p->p_cred->p_rgid; 1177 cpi.cpi_egid = p->p_ucred->cr_gid; 1178 cpi.cpi_svgid = p->p_cred->p_svgid; 1179 1180 (void)strlcpy(cpi.cpi_name, p->p_comm, sizeof(cpi.cpi_name)); 1181 1182 nhdr.namesz = sizeof("OpenBSD"); 1183 nhdr.descsz = sizeof(cpi); 1184 nhdr.type = NT_OPENBSD_PROCINFO; 1185 1186 error = ELFNAMEEND(coredump_writenote)(p, iocookie, &nhdr, 1187 "OpenBSD", &cpi); 1188 if (error) 1189 return (error); 1190 } 1191 size += notesize; 1192 1193 /* Second, write an NT_OPENBSD_AUXV note. */ 1194 notesize = sizeof(nhdr) + elfround(sizeof("OpenBSD")) + 1195 elfround(p->p_emul->e_arglen * sizeof(char *)); 1196 if (iocookie) { 1197 iov.iov_base = &pss; 1198 iov.iov_len = sizeof(pss); 1199 uio.uio_iov = &iov; 1200 uio.uio_iovcnt = 1; 1201 uio.uio_offset = (off_t)(vaddr_t)PS_STRINGS; 1202 uio.uio_resid = sizeof(pss); 1203 uio.uio_segflg = UIO_SYSSPACE; 1204 uio.uio_rw = UIO_READ; 1205 uio.uio_procp = NULL; 1206 1207 error = uvm_io(&p->p_vmspace->vm_map, &uio, 0); 1208 if (error) 1209 return (error); 1210 1211 if (pss.ps_envstr == NULL) 1212 return (EIO); 1213 1214 nhdr.namesz = sizeof("OpenBSD"); 1215 nhdr.descsz = p->p_emul->e_arglen * sizeof(char *); 1216 nhdr.type = NT_OPENBSD_AUXV; 1217 1218 error = coredump_write(iocookie, UIO_SYSSPACE, 1219 &nhdr, sizeof(nhdr)); 1220 if (error) 1221 return (error); 1222 1223 error = coredump_write(iocookie, UIO_SYSSPACE, 1224 "OpenBSD", elfround(nhdr.namesz)); 1225 if (error) 1226 return (error); 1227 1228 error = coredump_write(iocookie, UIO_USERSPACE, 1229 pss.ps_envstr + pss.ps_nenvstr + 1, nhdr.descsz); 1230 if (error) 1231 return (error); 1232 } 1233 size += notesize; 1234 1235 #ifdef PT_WCOOKIE 1236 notesize = sizeof(nhdr) + elfround(sizeof("OpenBSD")) + 1237 elfround(sizeof(register_t)); 1238 if (iocookie) { 1239 register_t wcookie; 1240 1241 nhdr.namesz = sizeof("OpenBSD"); 1242 nhdr.descsz = sizeof(register_t); 1243 nhdr.type = NT_OPENBSD_WCOOKIE; 1244 1245 wcookie = process_get_wcookie(p); 1246 error = ELFNAMEEND(coredump_writenote)(p, iocookie, &nhdr, 1247 "OpenBSD", &wcookie); 1248 if (error) 1249 return (error); 1250 } 1251 size += notesize; 1252 #endif 1253 1254 /* 1255 * Now write the register info for the thread that caused the 1256 * coredump. 1257 */ 1258 error = ELFNAMEEND(coredump_note)(p, iocookie, ¬esize); 1259 if (error) 1260 return (error); 1261 size += notesize; 1262 1263 /* 1264 * Now, for each thread, write the register info and any other 1265 * per-thread notes. Since we're dumping core, all the other 1266 * threads in the process have been stopped and the list can't 1267 * change. 1268 */ 1269 TAILQ_FOREACH(q, &pr->ps_threads, p_thr_link) { 1270 if (q == p) /* we've taken care of this thread */ 1271 continue; 1272 error = ELFNAMEEND(coredump_note)(q, iocookie, ¬esize); 1273 if (error) 1274 return (error); 1275 size += notesize; 1276 } 1277 1278 *sizep = size; 1279 #endif 1280 return (0); 1281 } 1282 1283 int 1284 ELFNAMEEND(coredump_note)(struct proc *p, void *iocookie, size_t *sizep) 1285 { 1286 #ifndef SMALL_KERNEL 1287 Elf_Note nhdr; 1288 int size, notesize, error; 1289 int namesize; 1290 char name[64+ELFROUNDSIZE]; 1291 struct reg intreg; 1292 #ifdef PT_GETFPREGS 1293 struct fpreg freg; 1294 #endif 1295 1296 size = 0; 1297 1298 snprintf(name, sizeof(name)-ELFROUNDSIZE, "%s@%d", 1299 "OpenBSD", p->p_pid); 1300 namesize = strlen(name) + 1; 1301 memset(name + namesize, 0, elfround(namesize) - namesize); 1302 1303 notesize = sizeof(nhdr) + elfround(namesize) + elfround(sizeof(intreg)); 1304 if (iocookie) { 1305 error = process_read_regs(p, &intreg); 1306 if (error) 1307 return (error); 1308 1309 nhdr.namesz = namesize; 1310 nhdr.descsz = sizeof(intreg); 1311 nhdr.type = NT_OPENBSD_REGS; 1312 1313 error = ELFNAMEEND(coredump_writenote)(p, iocookie, &nhdr, 1314 name, &intreg); 1315 if (error) 1316 return (error); 1317 1318 } 1319 size += notesize; 1320 1321 #ifdef PT_GETFPREGS 1322 notesize = sizeof(nhdr) + elfround(namesize) + elfround(sizeof(freg)); 1323 if (iocookie) { 1324 error = process_read_fpregs(p, &freg); 1325 if (error) 1326 return (error); 1327 1328 nhdr.namesz = namesize; 1329 nhdr.descsz = sizeof(freg); 1330 nhdr.type = NT_OPENBSD_FPREGS; 1331 1332 error = ELFNAMEEND(coredump_writenote)(p, iocookie, &nhdr, 1333 name, &freg); 1334 if (error) 1335 return (error); 1336 } 1337 size += notesize; 1338 #endif 1339 1340 *sizep = size; 1341 /* XXX Add hook for machdep per-LWP notes. */ 1342 #endif 1343 return (0); 1344 } 1345 1346 int 1347 ELFNAMEEND(coredump_writenote)(struct proc *p, void *cookie, Elf_Note *nhdr, 1348 const char *name, void *data) 1349 { 1350 #ifdef SMALL_KERNEL 1351 return EPERM; 1352 #else 1353 int error; 1354 1355 error = coredump_write(cookie, UIO_SYSSPACE, nhdr, sizeof(*nhdr)); 1356 if (error) 1357 return error; 1358 1359 error = coredump_write(cookie, UIO_SYSSPACE, name, 1360 elfround(nhdr->namesz)); 1361 if (error) 1362 return error; 1363 1364 return coredump_write(cookie, UIO_SYSSPACE, data, nhdr->descsz); 1365 #endif 1366 } 1367