1 /*- 2 * Copyright (c) 1998 Michael Smith <msmith@freebsd.org> 3 * Copyright (c) 1998 Peter Wemm <peter@freebsd.org> 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 __FBSDID("$FreeBSD$"); 30 31 #include <sys/param.h> 32 #include <sys/endian.h> 33 #include <sys/exec.h> 34 #include <sys/linker.h> 35 #include <sys/module.h> 36 #include <sys/stdint.h> 37 #include <string.h> 38 #include <machine/elf.h> 39 #include <stand.h> 40 #define FREEBSD_ELF 41 #include <sys/link_elf.h> 42 43 #include "bootstrap.h" 44 45 #define COPYOUT(s,d,l) archsw.arch_copyout((vm_offset_t)(s), d, l) 46 47 #if defined(__i386__) && __ELF_WORD_SIZE == 64 48 #undef ELF_TARG_CLASS 49 #undef ELF_TARG_MACH 50 #define ELF_TARG_CLASS ELFCLASS64 51 #define ELF_TARG_MACH EM_X86_64 52 #endif 53 54 typedef struct elf_file { 55 Elf_Phdr *ph; 56 Elf_Ehdr *ehdr; 57 Elf_Sym *symtab; 58 Elf_Hashelt *hashtab; 59 Elf_Hashelt nbuckets; 60 Elf_Hashelt nchains; 61 Elf_Hashelt *buckets; 62 Elf_Hashelt *chains; 63 Elf_Rel *rel; 64 size_t relsz; 65 Elf_Rela *rela; 66 size_t relasz; 67 char *strtab; 68 size_t strsz; 69 int fd; 70 caddr_t firstpage; 71 size_t firstlen; 72 int kernel; 73 uint64_t off; 74 #ifdef LOADER_VERIEXEC_VECTX 75 struct vectx *vctx; 76 #endif 77 } *elf_file_t; 78 79 #ifdef LOADER_VERIEXEC_VECTX 80 #define VECTX_HANDLE(ef) (ef)->vctx 81 #else 82 #define VECTX_HANDLE(ef) (ef)->fd 83 #endif 84 85 static int __elfN(loadimage)(struct preloaded_file *mp, elf_file_t ef, 86 uint64_t loadaddr); 87 static int __elfN(lookup_symbol)(elf_file_t ef, const char* name, 88 Elf_Sym *sym, unsigned char type); 89 static int __elfN(reloc_ptr)(struct preloaded_file *mp, elf_file_t ef, 90 Elf_Addr p, void *val, size_t len); 91 static int __elfN(parse_modmetadata)(struct preloaded_file *mp, elf_file_t ef, 92 Elf_Addr p_start, Elf_Addr p_end); 93 static symaddr_fn __elfN(symaddr); 94 static char *fake_modname(const char *name); 95 96 const char *__elfN(kerneltype) = "elf kernel"; 97 const char *__elfN(moduletype) = "elf module"; 98 99 uint64_t __elfN(relocation_offset) = 0; 100 101 extern void elf_wrong_field_size(void); 102 #define CONVERT_FIELD(b, f, e) \ 103 switch (sizeof((b)->f)) { \ 104 case 2: \ 105 (b)->f = e ## 16toh((b)->f); \ 106 break; \ 107 case 4: \ 108 (b)->f = e ## 32toh((b)->f); \ 109 break; \ 110 case 8: \ 111 (b)->f = e ## 64toh((b)->f); \ 112 break; \ 113 default: \ 114 /* Force a link time error. */ \ 115 elf_wrong_field_size(); \ 116 break; \ 117 } 118 119 #define CONVERT_SWITCH(h, d, f) \ 120 switch ((h)->e_ident[EI_DATA]) { \ 121 case ELFDATA2MSB: \ 122 f(d, be); \ 123 break; \ 124 case ELFDATA2LSB: \ 125 f(d, le); \ 126 break; \ 127 default: \ 128 return (EINVAL); \ 129 } 130 131 132 static int elf_header_convert(Elf_Ehdr *ehdr) 133 { 134 /* 135 * Fixup ELF header endianness. 136 * 137 * The Xhdr structure was loaded using block read call to optimize file 138 * accesses. It might happen, that the endianness of the system memory 139 * is different that endianness of the ELF header. Swap fields here to 140 * guarantee that Xhdr always contain valid data regardless of 141 * architecture. 142 */ 143 #define HEADER_FIELDS(b, e) \ 144 CONVERT_FIELD(b, e_type, e); \ 145 CONVERT_FIELD(b, e_machine, e); \ 146 CONVERT_FIELD(b, e_version, e); \ 147 CONVERT_FIELD(b, e_entry, e); \ 148 CONVERT_FIELD(b, e_phoff, e); \ 149 CONVERT_FIELD(b, e_shoff, e); \ 150 CONVERT_FIELD(b, e_flags, e); \ 151 CONVERT_FIELD(b, e_ehsize, e); \ 152 CONVERT_FIELD(b, e_phentsize, e); \ 153 CONVERT_FIELD(b, e_phnum, e); \ 154 CONVERT_FIELD(b, e_shentsize, e); \ 155 CONVERT_FIELD(b, e_shnum, e); \ 156 CONVERT_FIELD(b, e_shstrndx, e) 157 158 CONVERT_SWITCH(ehdr, ehdr, HEADER_FIELDS); 159 160 #undef HEADER_FIELDS 161 162 return (0); 163 } 164 165 static int elf_program_header_convert(const Elf_Ehdr *ehdr, Elf_Phdr *phdr) 166 { 167 #define PROGRAM_HEADER_FIELDS(b, e) \ 168 CONVERT_FIELD(b, p_type, e); \ 169 CONVERT_FIELD(b, p_flags, e); \ 170 CONVERT_FIELD(b, p_offset, e); \ 171 CONVERT_FIELD(b, p_vaddr, e); \ 172 CONVERT_FIELD(b, p_paddr, e); \ 173 CONVERT_FIELD(b, p_filesz, e); \ 174 CONVERT_FIELD(b, p_memsz, e); \ 175 CONVERT_FIELD(b, p_align, e) 176 177 CONVERT_SWITCH(ehdr, phdr, PROGRAM_HEADER_FIELDS); 178 179 #undef PROGRAM_HEADER_FIELDS 180 181 return (0); 182 } 183 184 static int elf_section_header_convert(const Elf_Ehdr *ehdr, Elf_Shdr *shdr) 185 { 186 #define SECTION_HEADER_FIELDS(b, e) \ 187 CONVERT_FIELD(b, sh_name, e); \ 188 CONVERT_FIELD(b, sh_type, e); \ 189 CONVERT_FIELD(b, sh_link, e); \ 190 CONVERT_FIELD(b, sh_info, e); \ 191 CONVERT_FIELD(b, sh_flags, e); \ 192 CONVERT_FIELD(b, sh_addr, e); \ 193 CONVERT_FIELD(b, sh_offset, e); \ 194 CONVERT_FIELD(b, sh_size, e); \ 195 CONVERT_FIELD(b, sh_addralign, e); \ 196 CONVERT_FIELD(b, sh_entsize, e) 197 198 CONVERT_SWITCH(ehdr, shdr, SECTION_HEADER_FIELDS); 199 200 #undef SECTION_HEADER_FIELDS 201 202 return (0); 203 } 204 #undef CONVERT_SWITCH 205 #undef CONVERT_FIELD 206 207 208 #ifdef __amd64__ 209 static bool 210 is_kernphys_relocatable(elf_file_t ef) 211 { 212 Elf_Sym sym; 213 214 return (__elfN(lookup_symbol)(ef, "kernphys", &sym, STT_OBJECT) == 0); 215 } 216 #endif 217 218 #ifdef __i386__ 219 static bool 220 is_tg_kernel_support(struct preloaded_file *fp, elf_file_t ef) 221 { 222 Elf_Sym sym; 223 Elf_Addr p_start, p_end, v, p; 224 char vd_name[16]; 225 int error; 226 227 if (__elfN(lookup_symbol)(ef, "__start_set_vt_drv_set", &sym, STT_NOTYPE) != 0) 228 return (false); 229 p_start = sym.st_value + ef->off; 230 if (__elfN(lookup_symbol)(ef, "__stop_set_vt_drv_set", &sym, STT_NOTYPE) != 0) 231 return (false); 232 p_end = sym.st_value + ef->off; 233 234 /* 235 * Walk through vt_drv_set, each vt driver structure starts with 236 * static 16 chars for driver name. If we have "vbefb", return true. 237 */ 238 for (p = p_start; p < p_end; p += sizeof(Elf_Addr)) { 239 COPYOUT(p, &v, sizeof(v)); 240 241 error = __elfN(reloc_ptr)(fp, ef, p, &v, sizeof(v)); 242 if (error == EOPNOTSUPP) 243 v += ef->off; 244 else if (error != 0) 245 return (false); 246 COPYOUT(v, &vd_name, sizeof(vd_name)); 247 if (strncmp(vd_name, "vbefb", sizeof(vd_name)) == 0) 248 return (true); 249 } 250 251 return (false); 252 } 253 #endif 254 255 static int 256 __elfN(load_elf_header)(char *filename, elf_file_t ef) 257 { 258 ssize_t bytes_read; 259 Elf_Ehdr *ehdr; 260 int err; 261 262 /* 263 * Open the image, read and validate the ELF header 264 */ 265 if (filename == NULL) /* can't handle nameless */ 266 return (EFTYPE); 267 if ((ef->fd = open(filename, O_RDONLY)) == -1) 268 return (errno); 269 ef->firstpage = malloc(PAGE_SIZE); 270 if (ef->firstpage == NULL) { 271 close(ef->fd); 272 return (ENOMEM); 273 } 274 preload(ef->fd); 275 #ifdef LOADER_VERIEXEC_VECTX 276 { 277 int verror; 278 279 ef->vctx = vectx_open(ef->fd, filename, 0L, NULL, &verror, __func__); 280 if (verror) { 281 printf("Unverified %s: %s\n", filename, ve_error_get()); 282 close(ef->fd); 283 free(ef->vctx); 284 return (EAUTH); 285 } 286 } 287 #endif 288 bytes_read = VECTX_READ(VECTX_HANDLE(ef), ef->firstpage, PAGE_SIZE); 289 ef->firstlen = (size_t)bytes_read; 290 if (bytes_read < 0 || ef->firstlen <= sizeof(Elf_Ehdr)) { 291 err = EFTYPE; /* could be EIO, but may be small file */ 292 goto error; 293 } 294 ehdr = ef->ehdr = (Elf_Ehdr *)ef->firstpage; 295 296 /* Is it ELF? */ 297 if (!IS_ELF(*ehdr)) { 298 err = EFTYPE; 299 goto error; 300 } 301 302 if (ehdr->e_ident[EI_CLASS] != ELF_TARG_CLASS || /* Layout ? */ 303 ehdr->e_ident[EI_DATA] != ELF_TARG_DATA || 304 ehdr->e_ident[EI_VERSION] != EV_CURRENT) /* Version ? */ { 305 err = EFTYPE; 306 goto error; 307 } 308 309 err = elf_header_convert(ehdr); 310 if (err) 311 goto error; 312 313 if (ehdr->e_version != EV_CURRENT || ehdr->e_machine != ELF_TARG_MACH) { 314 /* Machine ? */ 315 err = EFTYPE; 316 goto error; 317 } 318 319 #if defined(LOADER_VERIEXEC) && !defined(LOADER_VERIEXEC_VECTX) 320 if (verify_file(ef->fd, filename, bytes_read, VE_MUST, __func__) < 0) { 321 err = EAUTH; 322 goto error; 323 } 324 #endif 325 return (0); 326 327 error: 328 if (ef->firstpage != NULL) { 329 free(ef->firstpage); 330 ef->firstpage = NULL; 331 } 332 if (ef->fd != -1) { 333 #ifdef LOADER_VERIEXEC_VECTX 334 free(ef->vctx); 335 #endif 336 close(ef->fd); 337 ef->fd = -1; 338 } 339 return (err); 340 } 341 342 /* 343 * Attempt to load the file (file) as an ELF module. It will be stored at 344 * (dest), and a pointer to a module structure describing the loaded object 345 * will be saved in (result). 346 */ 347 int 348 __elfN(loadfile)(char *filename, uint64_t dest, struct preloaded_file **result) 349 { 350 return (__elfN(loadfile_raw)(filename, dest, result, 0)); 351 } 352 353 int 354 __elfN(loadfile_raw)(char *filename, uint64_t dest, 355 struct preloaded_file **result, int multiboot) 356 { 357 struct preloaded_file *fp, *kfp; 358 struct elf_file ef; 359 Elf_Ehdr *ehdr; 360 int err; 361 362 fp = NULL; 363 bzero(&ef, sizeof(struct elf_file)); 364 ef.fd = -1; 365 366 err = __elfN(load_elf_header)(filename, &ef); 367 if (err != 0) 368 return (err); 369 370 ehdr = ef.ehdr; 371 372 /* 373 * Check to see what sort of module we are. 374 */ 375 kfp = file_findfile(NULL, __elfN(kerneltype)); 376 #ifdef __powerpc__ 377 /* 378 * Kernels can be ET_DYN, so just assume the first loaded object is the 379 * kernel. This assumption will be checked later. 380 */ 381 if (kfp == NULL) 382 ef.kernel = 1; 383 #endif 384 if (ef.kernel || ehdr->e_type == ET_EXEC) { 385 /* Looks like a kernel */ 386 if (kfp != NULL) { 387 printf("elf" __XSTRING(__ELF_WORD_SIZE) 388 "_loadfile: kernel already loaded\n"); 389 err = EPERM; 390 goto oerr; 391 } 392 /* 393 * Calculate destination address based on kernel entrypoint. 394 * 395 * For ARM, the destination address is independent of any values 396 * in the elf header (an ARM kernel can be loaded at any 2MB 397 * boundary), so we leave dest set to the value calculated by 398 * archsw.arch_loadaddr() and passed in to this function. 399 */ 400 #ifndef __arm__ 401 if (ehdr->e_type == ET_EXEC) 402 dest = (ehdr->e_entry & ~PAGE_MASK); 403 #endif 404 if ((ehdr->e_entry & ~PAGE_MASK) == 0) { 405 printf("elf" __XSTRING(__ELF_WORD_SIZE) 406 "_loadfile: not a kernel (maybe static binary?)\n"); 407 err = EPERM; 408 goto oerr; 409 } 410 ef.kernel = 1; 411 412 } else if (ehdr->e_type == ET_DYN) { 413 /* Looks like a kld module */ 414 if (multiboot != 0) { 415 printf("elf" __XSTRING(__ELF_WORD_SIZE) 416 "_loadfile: can't load module as multiboot\n"); 417 err = EPERM; 418 goto oerr; 419 } 420 if (kfp == NULL) { 421 printf("elf" __XSTRING(__ELF_WORD_SIZE) 422 "_loadfile: can't load module before kernel\n"); 423 err = EPERM; 424 goto oerr; 425 } 426 if (strcmp(__elfN(kerneltype), kfp->f_type)) { 427 printf("elf" __XSTRING(__ELF_WORD_SIZE) 428 "_loadfile: can't load module with kernel type '%s'\n", 429 kfp->f_type); 430 err = EPERM; 431 goto oerr; 432 } 433 /* Looks OK, got ahead */ 434 ef.kernel = 0; 435 436 } else { 437 err = EFTYPE; 438 goto oerr; 439 } 440 441 if (archsw.arch_loadaddr != NULL) 442 dest = archsw.arch_loadaddr(LOAD_ELF, ehdr, dest); 443 else 444 dest = roundup(dest, PAGE_SIZE); 445 446 /* 447 * Ok, we think we should handle this. 448 */ 449 fp = file_alloc(); 450 if (fp == NULL) { 451 printf("elf" __XSTRING(__ELF_WORD_SIZE) 452 "_loadfile: cannot allocate module info\n"); 453 err = EPERM; 454 goto out; 455 } 456 if (ef.kernel == 1 && multiboot == 0) 457 setenv("kernelname", filename, 1); 458 fp->f_name = strdup(filename); 459 if (multiboot == 0) 460 fp->f_type = strdup(ef.kernel ? 461 __elfN(kerneltype) : __elfN(moduletype)); 462 else 463 fp->f_type = strdup("elf multiboot kernel"); 464 465 if (module_verbose >= MODULE_VERBOSE_FULL) { 466 if (ef.kernel) 467 printf("%s entry at 0x%jx\n", filename, 468 (uintmax_t)ehdr->e_entry); 469 } else if (module_verbose > MODULE_VERBOSE_SILENT) 470 printf("%s ", filename); 471 472 fp->f_size = __elfN(loadimage)(fp, &ef, dest); 473 if (fp->f_size == 0 || fp->f_addr == 0) 474 goto ioerr; 475 476 /* save exec header as metadata */ 477 file_addmetadata(fp, MODINFOMD_ELFHDR, sizeof(*ehdr), ehdr); 478 479 /* Load OK, return module pointer */ 480 *result = (struct preloaded_file *)fp; 481 err = 0; 482 #ifdef __amd64__ 483 fp->f_kernphys_relocatable = multiboot || is_kernphys_relocatable(&ef); 484 #endif 485 #ifdef __i386__ 486 fp->f_tg_kernel_support = is_tg_kernel_support(fp, &ef); 487 #endif 488 goto out; 489 490 ioerr: 491 err = EIO; 492 oerr: 493 file_discard(fp); 494 out: 495 if (ef.firstpage) 496 free(ef.firstpage); 497 if (ef.fd != -1) { 498 #ifdef LOADER_VERIEXEC_VECTX 499 if (!err && ef.vctx) { 500 int verror; 501 502 verror = vectx_close(ef.vctx, VE_MUST, __func__); 503 if (verror) { 504 err = EAUTH; 505 file_discard(fp); 506 } 507 } 508 #endif 509 close(ef.fd); 510 } 511 return (err); 512 } 513 514 /* 515 * With the file (fd) open on the image, and (ehdr) containing 516 * the Elf header, load the image at (off) 517 */ 518 static int 519 __elfN(loadimage)(struct preloaded_file *fp, elf_file_t ef, uint64_t off) 520 { 521 int i; 522 u_int j; 523 Elf_Ehdr *ehdr; 524 Elf_Phdr *phdr, *php; 525 Elf_Shdr *shdr; 526 char *shstr; 527 int ret; 528 vm_offset_t firstaddr; 529 vm_offset_t lastaddr; 530 size_t chunk; 531 ssize_t result; 532 Elf_Addr ssym, esym; 533 Elf_Dyn *dp; 534 Elf_Addr adp; 535 Elf_Addr ctors; 536 int ndp; 537 int symstrindex; 538 int symtabindex; 539 Elf_Size size; 540 u_int fpcopy; 541 Elf_Sym sym; 542 Elf_Addr p_start, p_end; 543 544 dp = NULL; 545 shdr = NULL; 546 ret = 0; 547 firstaddr = lastaddr = 0; 548 ehdr = ef->ehdr; 549 #ifdef __powerpc__ 550 if (ef->kernel) { 551 #else 552 if (ehdr->e_type == ET_EXEC) { 553 #endif 554 #if defined(__i386__) || defined(__amd64__) 555 #if __ELF_WORD_SIZE == 64 556 /* x86_64 relocates after locore */ 557 off = - (off & 0xffffffffff000000ull); 558 #else 559 /* i386 relocates after locore */ 560 off = - (off & 0xff000000u); 561 #endif 562 #elif defined(__powerpc__) 563 /* 564 * On the purely virtual memory machines like e500, the kernel 565 * is linked against its final VA range, which is most often 566 * not available at the loader stage, but only after kernel 567 * initializes and completes its VM settings. In such cases we 568 * cannot use p_vaddr field directly to load ELF segments, but 569 * put them at some 'load-time' locations. 570 */ 571 if (off & 0xf0000000u) { 572 off = -(off & 0xf0000000u); 573 /* 574 * XXX the physical load address should not be 575 * hardcoded. Note that the Book-E kernel assumes that 576 * it's loaded at a 16MB boundary for now... 577 */ 578 off += 0x01000000; 579 } 580 ehdr->e_entry += off; 581 if (module_verbose >= MODULE_VERBOSE_FULL) 582 printf("Converted entry 0x%jx\n", 583 (uintmax_t)ehdr->e_entry); 584 585 #elif defined(__arm__) && !defined(EFI) 586 /* 587 * The elf headers in arm kernels specify virtual addresses in 588 * all header fields, even the ones that should be physical 589 * addresses. We assume the entry point is in the first page, 590 * and masking the page offset will leave us with the virtual 591 * address the kernel was linked at. We subtract that from the 592 * load offset, making 'off' into the value which, when added 593 * to a virtual address in an elf header, translates it to a 594 * physical address. We do the va->pa conversion on the entry 595 * point address in the header now, so that later we can launch 596 * the kernel by just jumping to that address. 597 * 598 * When booting from UEFI the copyin and copyout functions 599 * handle adjusting the location relative to the first virtual 600 * address. Because of this there is no need to adjust the 601 * offset or entry point address as these will both be handled 602 * by the efi code. 603 */ 604 off -= ehdr->e_entry & ~PAGE_MASK; 605 ehdr->e_entry += off; 606 if (module_verbose >= MODULE_VERBOSE_FULL) 607 printf("ehdr->e_entry 0x%jx, va<->pa off %llx\n", 608 (uintmax_t)ehdr->e_entry, off); 609 #else 610 off = 0; /* other archs use direct mapped kernels */ 611 #endif 612 } 613 ef->off = off; 614 615 if (ef->kernel) 616 __elfN(relocation_offset) = off; 617 618 if ((ehdr->e_phoff + ehdr->e_phnum * sizeof(*phdr)) > ef->firstlen) { 619 printf("elf" __XSTRING(__ELF_WORD_SIZE) 620 "_loadimage: program header not within first page\n"); 621 goto out; 622 } 623 phdr = (Elf_Phdr *)(ef->firstpage + ehdr->e_phoff); 624 625 for (i = 0; i < ehdr->e_phnum; i++) { 626 if (elf_program_header_convert(ehdr, phdr)) 627 continue; 628 629 /* We want to load PT_LOAD segments only.. */ 630 if (phdr[i].p_type != PT_LOAD) 631 continue; 632 633 if (module_verbose >= MODULE_VERBOSE_FULL) { 634 printf("Segment: 0x%lx@0x%lx -> 0x%lx-0x%lx", 635 (long)phdr[i].p_filesz, (long)phdr[i].p_offset, 636 (long)(phdr[i].p_vaddr + off), 637 (long)(phdr[i].p_vaddr + off + phdr[i].p_memsz - 1)); 638 } else if (module_verbose > MODULE_VERBOSE_SILENT) { 639 if ((phdr[i].p_flags & PF_W) == 0) { 640 printf("text=0x%lx ", (long)phdr[i].p_filesz); 641 } else { 642 printf("data=0x%lx", (long)phdr[i].p_filesz); 643 if (phdr[i].p_filesz < phdr[i].p_memsz) 644 printf("+0x%lx", (long)(phdr[i].p_memsz - 645 phdr[i].p_filesz)); 646 printf(" "); 647 } 648 } 649 fpcopy = 0; 650 if (ef->firstlen > phdr[i].p_offset) { 651 fpcopy = ef->firstlen - phdr[i].p_offset; 652 archsw.arch_copyin(ef->firstpage + phdr[i].p_offset, 653 phdr[i].p_vaddr + off, fpcopy); 654 } 655 if (phdr[i].p_filesz > fpcopy) { 656 if (kern_pread(VECTX_HANDLE(ef), 657 phdr[i].p_vaddr + off + fpcopy, 658 phdr[i].p_filesz - fpcopy, 659 phdr[i].p_offset + fpcopy) != 0) { 660 printf("\nelf" __XSTRING(__ELF_WORD_SIZE) 661 "_loadimage: read failed\n"); 662 goto out; 663 } 664 } 665 /* clear space from oversized segments; eg: bss */ 666 if (phdr[i].p_filesz < phdr[i].p_memsz) { 667 if (module_verbose >= MODULE_VERBOSE_FULL) { 668 printf(" (bss: 0x%lx-0x%lx)", 669 (long)(phdr[i].p_vaddr + off + phdr[i].p_filesz), 670 (long)(phdr[i].p_vaddr + off + phdr[i].p_memsz -1)); 671 } 672 kern_bzero(phdr[i].p_vaddr + off + phdr[i].p_filesz, 673 phdr[i].p_memsz - phdr[i].p_filesz); 674 } 675 if (module_verbose >= MODULE_VERBOSE_FULL) 676 printf("\n"); 677 678 if (archsw.arch_loadseg != NULL) 679 archsw.arch_loadseg(ehdr, phdr + i, off); 680 681 if (firstaddr == 0 || firstaddr > (phdr[i].p_vaddr + off)) 682 firstaddr = phdr[i].p_vaddr + off; 683 if (lastaddr == 0 || lastaddr < 684 (phdr[i].p_vaddr + off + phdr[i].p_memsz)) 685 lastaddr = phdr[i].p_vaddr + off + phdr[i].p_memsz; 686 } 687 lastaddr = roundup(lastaddr, sizeof(long)); 688 689 /* 690 * Get the section headers. We need this for finding the .ctors 691 * section as well as for loading any symbols. Both may be hard 692 * to do if reading from a .gz file as it involves seeking. I 693 * think the rule is going to have to be that you must strip a 694 * file to remove symbols before gzipping it. 695 */ 696 chunk = (size_t)ehdr->e_shnum * (size_t)ehdr->e_shentsize; 697 if (chunk == 0 || ehdr->e_shoff == 0) 698 goto nosyms; 699 shdr = alloc_pread(VECTX_HANDLE(ef), ehdr->e_shoff, chunk); 700 if (shdr == NULL) { 701 printf("\nelf" __XSTRING(__ELF_WORD_SIZE) 702 "_loadimage: failed to read section headers"); 703 goto nosyms; 704 } 705 706 for (i = 0; i < ehdr->e_shnum; i++) 707 elf_section_header_convert(ehdr, &shdr[i]); 708 709 file_addmetadata(fp, MODINFOMD_SHDR, chunk, shdr); 710 711 /* 712 * Read the section string table and look for the .ctors section. 713 * We need to tell the kernel where it is so that it can call the 714 * ctors. 715 */ 716 chunk = shdr[ehdr->e_shstrndx].sh_size; 717 if (chunk) { 718 shstr = alloc_pread(VECTX_HANDLE(ef), 719 shdr[ehdr->e_shstrndx].sh_offset, chunk); 720 if (shstr) { 721 for (i = 0; i < ehdr->e_shnum; i++) { 722 if (strcmp(shstr + shdr[i].sh_name, 723 ".ctors") != 0) 724 continue; 725 ctors = shdr[i].sh_addr; 726 file_addmetadata(fp, MODINFOMD_CTORS_ADDR, 727 sizeof(ctors), &ctors); 728 size = shdr[i].sh_size; 729 file_addmetadata(fp, MODINFOMD_CTORS_SIZE, 730 sizeof(size), &size); 731 break; 732 } 733 free(shstr); 734 } 735 } 736 737 /* 738 * Now load any symbols. 739 */ 740 symtabindex = -1; 741 symstrindex = -1; 742 for (i = 0; i < ehdr->e_shnum; i++) { 743 if (shdr[i].sh_type != SHT_SYMTAB) 744 continue; 745 for (j = 0; j < ehdr->e_phnum; j++) { 746 if (phdr[j].p_type != PT_LOAD) 747 continue; 748 if (shdr[i].sh_offset >= phdr[j].p_offset && 749 (shdr[i].sh_offset + shdr[i].sh_size <= 750 phdr[j].p_offset + phdr[j].p_filesz)) { 751 shdr[i].sh_offset = 0; 752 shdr[i].sh_size = 0; 753 break; 754 } 755 } 756 if (shdr[i].sh_offset == 0 || shdr[i].sh_size == 0) 757 continue; /* alread loaded in a PT_LOAD above */ 758 /* Save it for loading below */ 759 symtabindex = i; 760 symstrindex = shdr[i].sh_link; 761 } 762 if (symtabindex < 0 || symstrindex < 0) 763 goto nosyms; 764 765 /* Ok, committed to a load. */ 766 if (module_verbose >= MODULE_VERBOSE_FULL) 767 printf("syms=["); 768 ssym = lastaddr; 769 for (i = symtabindex; i >= 0; i = symstrindex) { 770 char *secname; 771 772 switch(shdr[i].sh_type) { 773 case SHT_SYMTAB: /* Symbol table */ 774 secname = "symtab"; 775 break; 776 case SHT_STRTAB: /* String table */ 777 secname = "strtab"; 778 break; 779 default: 780 secname = "WHOA!!"; 781 break; 782 } 783 size = shdr[i].sh_size; 784 785 archsw.arch_copyin(&size, lastaddr, sizeof(size)); 786 lastaddr += sizeof(size); 787 788 if (module_verbose >= MODULE_VERBOSE_FULL) { 789 printf("\n%s: 0x%jx@0x%jx -> 0x%jx-0x%jx", secname, 790 (uintmax_t)shdr[i].sh_size, (uintmax_t)shdr[i].sh_offset, 791 (uintmax_t)lastaddr, 792 (uintmax_t)(lastaddr + shdr[i].sh_size)); 793 } else if (module_verbose > MODULE_VERBOSE_SILENT) { 794 if (i == symstrindex) 795 printf("+"); 796 printf("0x%lx+0x%lx", (long)sizeof(size), (long)size); 797 } 798 if (VECTX_LSEEK(VECTX_HANDLE(ef), (off_t)shdr[i].sh_offset, SEEK_SET) == -1) { 799 printf("\nelf" __XSTRING(__ELF_WORD_SIZE) 800 "_loadimage: could not seek for symbols - skipped!"); 801 lastaddr = ssym; 802 ssym = 0; 803 goto nosyms; 804 } 805 result = archsw.arch_readin(VECTX_HANDLE(ef), lastaddr, shdr[i].sh_size); 806 if (result < 0 || (size_t)result != shdr[i].sh_size) { 807 printf("\nelf" __XSTRING(__ELF_WORD_SIZE) 808 "_loadimage: could not read symbols - skipped! " 809 "(%ju != %ju)", (uintmax_t)result, 810 (uintmax_t)shdr[i].sh_size); 811 lastaddr = ssym; 812 ssym = 0; 813 goto nosyms; 814 } 815 /* Reset offsets relative to ssym */ 816 lastaddr += shdr[i].sh_size; 817 lastaddr = roundup(lastaddr, sizeof(size)); 818 if (i == symtabindex) 819 symtabindex = -1; 820 else if (i == symstrindex) 821 symstrindex = -1; 822 } 823 esym = lastaddr; 824 if (module_verbose >= MODULE_VERBOSE_FULL) 825 printf("]"); 826 827 file_addmetadata(fp, MODINFOMD_SSYM, sizeof(ssym), &ssym); 828 file_addmetadata(fp, MODINFOMD_ESYM, sizeof(esym), &esym); 829 830 nosyms: 831 if (module_verbose > MODULE_VERBOSE_SILENT) 832 printf("\n"); 833 834 ret = lastaddr - firstaddr; 835 fp->f_addr = firstaddr; 836 837 php = NULL; 838 for (i = 0; i < ehdr->e_phnum; i++) { 839 if (phdr[i].p_type == PT_DYNAMIC) { 840 php = phdr + i; 841 adp = php->p_vaddr; 842 file_addmetadata(fp, MODINFOMD_DYNAMIC, sizeof(adp), 843 &adp); 844 break; 845 } 846 } 847 848 if (php == NULL) /* this is bad, we cannot get to symbols or _DYNAMIC */ 849 goto out; 850 851 ndp = php->p_filesz / sizeof(Elf_Dyn); 852 if (ndp == 0) 853 goto out; 854 dp = malloc(php->p_filesz); 855 if (dp == NULL) 856 goto out; 857 archsw.arch_copyout(php->p_vaddr + off, dp, php->p_filesz); 858 859 ef->strsz = 0; 860 for (i = 0; i < ndp; i++) { 861 if (dp[i].d_tag == 0) 862 break; 863 switch (dp[i].d_tag) { 864 case DT_HASH: 865 ef->hashtab = 866 (Elf_Hashelt*)(uintptr_t)(dp[i].d_un.d_ptr + off); 867 break; 868 case DT_STRTAB: 869 ef->strtab = 870 (char *)(uintptr_t)(dp[i].d_un.d_ptr + off); 871 break; 872 case DT_STRSZ: 873 ef->strsz = dp[i].d_un.d_val; 874 break; 875 case DT_SYMTAB: 876 ef->symtab = 877 (Elf_Sym *)(uintptr_t)(dp[i].d_un.d_ptr + off); 878 break; 879 case DT_REL: 880 ef->rel = 881 (Elf_Rel *)(uintptr_t)(dp[i].d_un.d_ptr + off); 882 break; 883 case DT_RELSZ: 884 ef->relsz = dp[i].d_un.d_val; 885 break; 886 case DT_RELA: 887 ef->rela = 888 (Elf_Rela *)(uintptr_t)(dp[i].d_un.d_ptr + off); 889 break; 890 case DT_RELASZ: 891 ef->relasz = dp[i].d_un.d_val; 892 break; 893 default: 894 break; 895 } 896 } 897 if (ef->hashtab == NULL || ef->symtab == NULL || 898 ef->strtab == NULL || ef->strsz == 0) 899 goto out; 900 COPYOUT(ef->hashtab, &ef->nbuckets, sizeof(ef->nbuckets)); 901 COPYOUT(ef->hashtab + 1, &ef->nchains, sizeof(ef->nchains)); 902 ef->buckets = ef->hashtab + 2; 903 ef->chains = ef->buckets + ef->nbuckets; 904 905 if (__elfN(lookup_symbol)(ef, "__start_set_modmetadata_set", &sym, 906 STT_NOTYPE) != 0) 907 return 0; 908 p_start = sym.st_value + ef->off; 909 if (__elfN(lookup_symbol)(ef, "__stop_set_modmetadata_set", &sym, 910 STT_NOTYPE) != 0) 911 return 0; 912 p_end = sym.st_value + ef->off; 913 914 if (__elfN(parse_modmetadata)(fp, ef, p_start, p_end) == 0) 915 goto out; 916 917 if (ef->kernel) /* kernel must not depend on anything */ 918 goto out; 919 920 out: 921 if (dp) 922 free(dp); 923 if (shdr) 924 free(shdr); 925 return ret; 926 } 927 928 static char invalid_name[] = "bad"; 929 930 char * 931 fake_modname(const char *name) 932 { 933 const char *sp, *ep; 934 char *fp; 935 size_t len; 936 937 sp = strrchr(name, '/'); 938 if (sp) 939 sp++; 940 else 941 sp = name; 942 943 ep = strrchr(sp, '.'); 944 if (ep == NULL) { 945 ep = sp + strlen(sp); 946 } 947 if (ep == sp) { 948 sp = invalid_name; 949 ep = invalid_name + sizeof(invalid_name) - 1; 950 } 951 952 len = ep - sp; 953 fp = malloc(len + 1); 954 if (fp == NULL) 955 return NULL; 956 memcpy(fp, sp, len); 957 fp[len] = '\0'; 958 return fp; 959 } 960 961 #if (defined(__i386__) || defined(__powerpc__)) && __ELF_WORD_SIZE == 64 962 struct mod_metadata64 { 963 int md_version; /* structure version MDTV_* */ 964 int md_type; /* type of entry MDT_* */ 965 uint64_t md_data; /* specific data */ 966 uint64_t md_cval; /* common string label */ 967 }; 968 #endif 969 #if defined(__amd64__) && __ELF_WORD_SIZE == 32 970 struct mod_metadata32 { 971 int md_version; /* structure version MDTV_* */ 972 int md_type; /* type of entry MDT_* */ 973 uint32_t md_data; /* specific data */ 974 uint32_t md_cval; /* common string label */ 975 }; 976 #endif 977 978 int 979 __elfN(load_modmetadata)(struct preloaded_file *fp, uint64_t dest) 980 { 981 struct elf_file ef; 982 int err, i, j; 983 Elf_Shdr *sh_meta, *shdr = NULL; 984 Elf_Shdr *sh_data[2]; 985 char *shstrtab = NULL; 986 size_t size; 987 Elf_Addr p_start, p_end; 988 989 bzero(&ef, sizeof(struct elf_file)); 990 ef.fd = -1; 991 992 err = __elfN(load_elf_header)(fp->f_name, &ef); 993 if (err != 0) 994 goto out; 995 996 if (ef.kernel == 1 || ef.ehdr->e_type == ET_EXEC) { 997 ef.kernel = 1; 998 } else if (ef.ehdr->e_type != ET_DYN) { 999 err = EFTYPE; 1000 goto out; 1001 } 1002 1003 size = (size_t)ef.ehdr->e_shnum * (size_t)ef.ehdr->e_shentsize; 1004 shdr = alloc_pread(VECTX_HANDLE(&ef), ef.ehdr->e_shoff, size); 1005 if (shdr == NULL) { 1006 err = ENOMEM; 1007 goto out; 1008 } 1009 1010 /* Load shstrtab. */ 1011 shstrtab = alloc_pread(VECTX_HANDLE(&ef), shdr[ef.ehdr->e_shstrndx].sh_offset, 1012 shdr[ef.ehdr->e_shstrndx].sh_size); 1013 if (shstrtab == NULL) { 1014 printf("\nelf" __XSTRING(__ELF_WORD_SIZE) 1015 "load_modmetadata: unable to load shstrtab\n"); 1016 err = EFTYPE; 1017 goto out; 1018 } 1019 1020 /* Find set_modmetadata_set and data sections. */ 1021 sh_data[0] = sh_data[1] = sh_meta = NULL; 1022 for (i = 0, j = 0; i < ef.ehdr->e_shnum; i++) { 1023 if (strcmp(&shstrtab[shdr[i].sh_name], 1024 "set_modmetadata_set") == 0) { 1025 sh_meta = &shdr[i]; 1026 } 1027 if ((strcmp(&shstrtab[shdr[i].sh_name], ".data") == 0) || 1028 (strcmp(&shstrtab[shdr[i].sh_name], ".rodata") == 0)) { 1029 sh_data[j++] = &shdr[i]; 1030 } 1031 } 1032 if (sh_meta == NULL || sh_data[0] == NULL || sh_data[1] == NULL) { 1033 printf("\nelf" __XSTRING(__ELF_WORD_SIZE) 1034 "load_modmetadata: unable to find set_modmetadata_set or data sections\n"); 1035 err = EFTYPE; 1036 goto out; 1037 } 1038 1039 /* Load set_modmetadata_set into memory */ 1040 err = kern_pread(VECTX_HANDLE(&ef), dest, sh_meta->sh_size, sh_meta->sh_offset); 1041 if (err != 0) { 1042 printf("\nelf" __XSTRING(__ELF_WORD_SIZE) 1043 "load_modmetadata: unable to load set_modmetadata_set: %d\n", err); 1044 goto out; 1045 } 1046 p_start = dest; 1047 p_end = dest + sh_meta->sh_size; 1048 dest += sh_meta->sh_size; 1049 1050 /* Load data sections into memory. */ 1051 err = kern_pread(VECTX_HANDLE(&ef), dest, sh_data[0]->sh_size, 1052 sh_data[0]->sh_offset); 1053 if (err != 0) { 1054 printf("\nelf" __XSTRING(__ELF_WORD_SIZE) 1055 "load_modmetadata: unable to load data: %d\n", err); 1056 goto out; 1057 } 1058 1059 /* 1060 * We have to increment the dest, so that the offset is the same into 1061 * both the .rodata and .data sections. 1062 */ 1063 ef.off = -(sh_data[0]->sh_addr - dest); 1064 dest += (sh_data[1]->sh_addr - sh_data[0]->sh_addr); 1065 1066 err = kern_pread(VECTX_HANDLE(&ef), dest, sh_data[1]->sh_size, 1067 sh_data[1]->sh_offset); 1068 if (err != 0) { 1069 printf("\nelf" __XSTRING(__ELF_WORD_SIZE) 1070 "load_modmetadata: unable to load data: %d\n", err); 1071 goto out; 1072 } 1073 1074 err = __elfN(parse_modmetadata)(fp, &ef, p_start, p_end); 1075 if (err != 0) { 1076 printf("\nelf" __XSTRING(__ELF_WORD_SIZE) 1077 "load_modmetadata: unable to parse metadata: %d\n", err); 1078 goto out; 1079 } 1080 1081 out: 1082 if (shstrtab != NULL) 1083 free(shstrtab); 1084 if (shdr != NULL) 1085 free(shdr); 1086 if (ef.firstpage != NULL) 1087 free(ef.firstpage); 1088 if (ef.fd != -1) { 1089 #ifdef LOADER_VERIEXEC_VECTX 1090 if (!err && ef.vctx) { 1091 int verror; 1092 1093 verror = vectx_close(ef.vctx, VE_MUST, __func__); 1094 if (verror) { 1095 err = EAUTH; 1096 file_discard(fp); 1097 } 1098 } 1099 #endif 1100 close(ef.fd); 1101 } 1102 return (err); 1103 } 1104 1105 int 1106 __elfN(parse_modmetadata)(struct preloaded_file *fp, elf_file_t ef, 1107 Elf_Addr p_start, Elf_Addr p_end) 1108 { 1109 struct mod_metadata md; 1110 #if (defined(__i386__) || defined(__powerpc__)) && __ELF_WORD_SIZE == 64 1111 struct mod_metadata64 md64; 1112 #elif defined(__amd64__) && __ELF_WORD_SIZE == 32 1113 struct mod_metadata32 md32; 1114 #endif 1115 struct mod_depend *mdepend; 1116 struct mod_version mver; 1117 char *s; 1118 int error, modcnt, minfolen; 1119 Elf_Addr v, p; 1120 1121 modcnt = 0; 1122 p = p_start; 1123 while (p < p_end) { 1124 COPYOUT(p, &v, sizeof(v)); 1125 error = __elfN(reloc_ptr)(fp, ef, p, &v, sizeof(v)); 1126 if (error == EOPNOTSUPP) 1127 v += ef->off; 1128 else if (error != 0) 1129 return (error); 1130 #if (defined(__i386__) || defined(__powerpc__)) && __ELF_WORD_SIZE == 64 1131 COPYOUT(v, &md64, sizeof(md64)); 1132 error = __elfN(reloc_ptr)(fp, ef, v, &md64, sizeof(md64)); 1133 if (error == EOPNOTSUPP) { 1134 md64.md_cval += ef->off; 1135 md64.md_data += ef->off; 1136 } else if (error != 0) 1137 return (error); 1138 md.md_version = md64.md_version; 1139 md.md_type = md64.md_type; 1140 md.md_cval = (const char *)(uintptr_t)md64.md_cval; 1141 md.md_data = (void *)(uintptr_t)md64.md_data; 1142 #elif defined(__amd64__) && __ELF_WORD_SIZE == 32 1143 COPYOUT(v, &md32, sizeof(md32)); 1144 error = __elfN(reloc_ptr)(fp, ef, v, &md32, sizeof(md32)); 1145 if (error == EOPNOTSUPP) { 1146 md32.md_cval += ef->off; 1147 md32.md_data += ef->off; 1148 } else if (error != 0) 1149 return (error); 1150 md.md_version = md32.md_version; 1151 md.md_type = md32.md_type; 1152 md.md_cval = (const char *)(uintptr_t)md32.md_cval; 1153 md.md_data = (void *)(uintptr_t)md32.md_data; 1154 #else 1155 COPYOUT(v, &md, sizeof(md)); 1156 error = __elfN(reloc_ptr)(fp, ef, v, &md, sizeof(md)); 1157 if (error == EOPNOTSUPP) { 1158 md.md_cval += ef->off; 1159 md.md_data = (void *)((uintptr_t)md.md_data + 1160 (uintptr_t)ef->off); 1161 } else if (error != 0) 1162 return (error); 1163 #endif 1164 p += sizeof(Elf_Addr); 1165 switch(md.md_type) { 1166 case MDT_DEPEND: 1167 if (ef->kernel) /* kernel must not depend on anything */ 1168 break; 1169 s = strdupout((vm_offset_t)md.md_cval); 1170 minfolen = sizeof(*mdepend) + strlen(s) + 1; 1171 mdepend = malloc(minfolen); 1172 if (mdepend == NULL) 1173 return ENOMEM; 1174 COPYOUT((vm_offset_t)md.md_data, mdepend, 1175 sizeof(*mdepend)); 1176 strcpy((char*)(mdepend + 1), s); 1177 free(s); 1178 file_addmetadata(fp, MODINFOMD_DEPLIST, minfolen, 1179 mdepend); 1180 free(mdepend); 1181 break; 1182 case MDT_VERSION: 1183 s = strdupout((vm_offset_t)md.md_cval); 1184 COPYOUT((vm_offset_t)md.md_data, &mver, sizeof(mver)); 1185 file_addmodule(fp, s, mver.mv_version, NULL); 1186 free(s); 1187 modcnt++; 1188 break; 1189 } 1190 } 1191 if (modcnt == 0) { 1192 s = fake_modname(fp->f_name); 1193 file_addmodule(fp, s, 1, NULL); 1194 free(s); 1195 } 1196 return 0; 1197 } 1198 1199 static unsigned long 1200 elf_hash(const char *name) 1201 { 1202 const unsigned char *p = (const unsigned char *) name; 1203 unsigned long h = 0; 1204 unsigned long g; 1205 1206 while (*p != '\0') { 1207 h = (h << 4) + *p++; 1208 if ((g = h & 0xf0000000) != 0) 1209 h ^= g >> 24; 1210 h &= ~g; 1211 } 1212 return h; 1213 } 1214 1215 static const char __elfN(bad_symtable)[] = "elf" __XSTRING(__ELF_WORD_SIZE) 1216 "_lookup_symbol: corrupt symbol table\n"; 1217 int 1218 __elfN(lookup_symbol)(elf_file_t ef, const char* name, Elf_Sym *symp, 1219 unsigned char type) 1220 { 1221 Elf_Hashelt symnum; 1222 Elf_Sym sym; 1223 char *strp; 1224 unsigned long hash; 1225 1226 if (ef->nbuckets == 0) { 1227 printf(__elfN(bad_symtable)); 1228 return ENOENT; 1229 } 1230 1231 hash = elf_hash(name); 1232 COPYOUT(&ef->buckets[hash % ef->nbuckets], &symnum, sizeof(symnum)); 1233 1234 while (symnum != STN_UNDEF) { 1235 if (symnum >= ef->nchains) { 1236 printf(__elfN(bad_symtable)); 1237 return ENOENT; 1238 } 1239 1240 COPYOUT(ef->symtab + symnum, &sym, sizeof(sym)); 1241 if (sym.st_name == 0) { 1242 printf(__elfN(bad_symtable)); 1243 return ENOENT; 1244 } 1245 1246 strp = strdupout((vm_offset_t)(ef->strtab + sym.st_name)); 1247 if (strcmp(name, strp) == 0) { 1248 free(strp); 1249 if (sym.st_shndx != SHN_UNDEF || 1250 (sym.st_value != 0 && 1251 ELF_ST_TYPE(sym.st_info) == type)) { 1252 *symp = sym; 1253 return 0; 1254 } 1255 return ENOENT; 1256 } 1257 free(strp); 1258 COPYOUT(&ef->chains[symnum], &symnum, sizeof(symnum)); 1259 } 1260 return ENOENT; 1261 } 1262 1263 /* 1264 * Apply any intra-module relocations to the value. p is the load address 1265 * of the value and val/len is the value to be modified. This does NOT modify 1266 * the image in-place, because this is done by kern_linker later on. 1267 * 1268 * Returns EOPNOTSUPP if no relocation method is supplied. 1269 */ 1270 static int 1271 __elfN(reloc_ptr)(struct preloaded_file *mp, elf_file_t ef, 1272 Elf_Addr p, void *val, size_t len) 1273 { 1274 size_t n; 1275 Elf_Rela a; 1276 Elf_Rel r; 1277 int error; 1278 1279 /* 1280 * The kernel is already relocated, but we still want to apply 1281 * offset adjustments. 1282 */ 1283 if (ef->kernel) 1284 return (EOPNOTSUPP); 1285 1286 for (n = 0; n < ef->relsz / sizeof(r); n++) { 1287 COPYOUT(ef->rel + n, &r, sizeof(r)); 1288 1289 error = __elfN(reloc)(ef, __elfN(symaddr), &r, ELF_RELOC_REL, 1290 ef->off, p, val, len); 1291 if (error != 0) 1292 return (error); 1293 } 1294 for (n = 0; n < ef->relasz / sizeof(a); n++) { 1295 COPYOUT(ef->rela + n, &a, sizeof(a)); 1296 1297 error = __elfN(reloc)(ef, __elfN(symaddr), &a, ELF_RELOC_RELA, 1298 ef->off, p, val, len); 1299 if (error != 0) 1300 return (error); 1301 } 1302 1303 return (0); 1304 } 1305 1306 static Elf_Addr 1307 __elfN(symaddr)(struct elf_file *ef, Elf_Size symidx) 1308 { 1309 1310 /* Symbol lookup by index not required here. */ 1311 return (0); 1312 } 1313