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 #include <gfx_fb.h> 43 44 #include "bootstrap.h" 45 46 #define COPYOUT(s,d,l) archsw.arch_copyout((vm_offset_t)(s), d, l) 47 48 #if defined(__i386__) && __ELF_WORD_SIZE == 64 49 #undef ELF_TARG_CLASS 50 #undef ELF_TARG_MACH 51 #define ELF_TARG_CLASS ELFCLASS64 52 #define ELF_TARG_MACH EM_X86_64 53 #endif 54 55 typedef struct elf_file { 56 Elf_Phdr *ph; 57 Elf_Ehdr *ehdr; 58 Elf_Sym *symtab; 59 Elf_Hashelt *hashtab; 60 Elf_Hashelt nbuckets; 61 Elf_Hashelt nchains; 62 Elf_Hashelt *buckets; 63 Elf_Hashelt *chains; 64 Elf_Rel *rel; 65 size_t relsz; 66 Elf_Rela *rela; 67 size_t relasz; 68 char *strtab; 69 size_t strsz; 70 int fd; 71 caddr_t firstpage; 72 size_t firstlen; 73 int kernel; 74 uint64_t off; 75 #ifdef LOADER_VERIEXEC_VECTX 76 struct vectx *vctx; 77 #endif 78 } *elf_file_t; 79 80 #ifdef LOADER_VERIEXEC_VECTX 81 #define VECTX_HANDLE(ef) (ef)->vctx 82 #else 83 #define VECTX_HANDLE(ef) (ef)->fd 84 #endif 85 86 static int __elfN(loadimage)(struct preloaded_file *mp, elf_file_t ef, 87 uint64_t loadaddr); 88 static int __elfN(lookup_symbol)(elf_file_t ef, const char* name, 89 Elf_Sym *sym, unsigned char type); 90 static int __elfN(reloc_ptr)(struct preloaded_file *mp, elf_file_t ef, 91 Elf_Addr p, void *val, size_t len); 92 static int __elfN(parse_modmetadata)(struct preloaded_file *mp, elf_file_t ef, 93 Elf_Addr p_start, Elf_Addr p_end); 94 static bool __elfN(parse_vt_drv_set)(struct preloaded_file *mp, elf_file_t ef, 95 Elf_Addr p_start, Elf_Addr p_end); 96 static symaddr_fn __elfN(symaddr); 97 static char *fake_modname(const char *name); 98 99 const char *__elfN(kerneltype) = "elf kernel"; 100 const char *__elfN(moduletype) = "elf module"; 101 102 uint64_t __elfN(relocation_offset) = 0; 103 104 extern void elf_wrong_field_size(void); 105 #define CONVERT_FIELD(b, f, e) \ 106 switch (sizeof((b)->f)) { \ 107 case 2: \ 108 (b)->f = e ## 16toh((b)->f); \ 109 break; \ 110 case 4: \ 111 (b)->f = e ## 32toh((b)->f); \ 112 break; \ 113 case 8: \ 114 (b)->f = e ## 64toh((b)->f); \ 115 break; \ 116 default: \ 117 /* Force a link time error. */ \ 118 elf_wrong_field_size(); \ 119 break; \ 120 } 121 122 #define CONVERT_SWITCH(h, d, f) \ 123 switch ((h)->e_ident[EI_DATA]) { \ 124 case ELFDATA2MSB: \ 125 f(d, be); \ 126 break; \ 127 case ELFDATA2LSB: \ 128 f(d, le); \ 129 break; \ 130 default: \ 131 return (EINVAL); \ 132 } 133 134 135 static int elf_header_convert(Elf_Ehdr *ehdr) 136 { 137 /* 138 * Fixup ELF header endianness. 139 * 140 * The Xhdr structure was loaded using block read call to optimize file 141 * accesses. It might happen, that the endianness of the system memory 142 * is different that endianness of the ELF header. Swap fields here to 143 * guarantee that Xhdr always contain valid data regardless of 144 * architecture. 145 */ 146 #define HEADER_FIELDS(b, e) \ 147 CONVERT_FIELD(b, e_type, e); \ 148 CONVERT_FIELD(b, e_machine, e); \ 149 CONVERT_FIELD(b, e_version, e); \ 150 CONVERT_FIELD(b, e_entry, e); \ 151 CONVERT_FIELD(b, e_phoff, e); \ 152 CONVERT_FIELD(b, e_shoff, e); \ 153 CONVERT_FIELD(b, e_flags, e); \ 154 CONVERT_FIELD(b, e_ehsize, e); \ 155 CONVERT_FIELD(b, e_phentsize, e); \ 156 CONVERT_FIELD(b, e_phnum, e); \ 157 CONVERT_FIELD(b, e_shentsize, e); \ 158 CONVERT_FIELD(b, e_shnum, e); \ 159 CONVERT_FIELD(b, e_shstrndx, e) 160 161 CONVERT_SWITCH(ehdr, ehdr, HEADER_FIELDS); 162 163 #undef HEADER_FIELDS 164 165 return (0); 166 } 167 168 static int elf_program_header_convert(const Elf_Ehdr *ehdr, Elf_Phdr *phdr) 169 { 170 #define PROGRAM_HEADER_FIELDS(b, e) \ 171 CONVERT_FIELD(b, p_type, e); \ 172 CONVERT_FIELD(b, p_flags, e); \ 173 CONVERT_FIELD(b, p_offset, e); \ 174 CONVERT_FIELD(b, p_vaddr, e); \ 175 CONVERT_FIELD(b, p_paddr, e); \ 176 CONVERT_FIELD(b, p_filesz, e); \ 177 CONVERT_FIELD(b, p_memsz, e); \ 178 CONVERT_FIELD(b, p_align, e) 179 180 CONVERT_SWITCH(ehdr, phdr, PROGRAM_HEADER_FIELDS); 181 182 #undef PROGRAM_HEADER_FIELDS 183 184 return (0); 185 } 186 187 static int elf_section_header_convert(const Elf_Ehdr *ehdr, Elf_Shdr *shdr) 188 { 189 #define SECTION_HEADER_FIELDS(b, e) \ 190 CONVERT_FIELD(b, sh_name, e); \ 191 CONVERT_FIELD(b, sh_type, e); \ 192 CONVERT_FIELD(b, sh_link, e); \ 193 CONVERT_FIELD(b, sh_info, e); \ 194 CONVERT_FIELD(b, sh_flags, e); \ 195 CONVERT_FIELD(b, sh_addr, e); \ 196 CONVERT_FIELD(b, sh_offset, e); \ 197 CONVERT_FIELD(b, sh_size, e); \ 198 CONVERT_FIELD(b, sh_addralign, e); \ 199 CONVERT_FIELD(b, sh_entsize, e) 200 201 CONVERT_SWITCH(ehdr, shdr, SECTION_HEADER_FIELDS); 202 203 #undef SECTION_HEADER_FIELDS 204 205 return (0); 206 } 207 #undef CONVERT_SWITCH 208 #undef CONVERT_FIELD 209 210 static int 211 __elfN(load_elf_header)(char *filename, elf_file_t ef) 212 { 213 ssize_t bytes_read; 214 Elf_Ehdr *ehdr; 215 int err; 216 217 /* 218 * Open the image, read and validate the ELF header 219 */ 220 if (filename == NULL) /* can't handle nameless */ 221 return (EFTYPE); 222 if ((ef->fd = open(filename, O_RDONLY)) == -1) 223 return (errno); 224 ef->firstpage = malloc(PAGE_SIZE); 225 if (ef->firstpage == NULL) { 226 close(ef->fd); 227 return (ENOMEM); 228 } 229 #ifdef LOADER_VERIEXEC_VECTX 230 { 231 int verror; 232 233 ef->vctx = vectx_open(ef->fd, filename, 0L, NULL, &verror, __func__); 234 if (verror) { 235 printf("Unverified %s: %s\n", filename, ve_error_get()); 236 close(ef->fd); 237 free(ef->vctx); 238 return (EAUTH); 239 } 240 } 241 #endif 242 bytes_read = VECTX_READ(VECTX_HANDLE(ef), ef->firstpage, PAGE_SIZE); 243 ef->firstlen = (size_t)bytes_read; 244 if (bytes_read < 0 || ef->firstlen <= sizeof(Elf_Ehdr)) { 245 err = EFTYPE; /* could be EIO, but may be small file */ 246 goto error; 247 } 248 ehdr = ef->ehdr = (Elf_Ehdr *)ef->firstpage; 249 250 /* Is it ELF? */ 251 if (!IS_ELF(*ehdr)) { 252 err = EFTYPE; 253 goto error; 254 } 255 256 if (ehdr->e_ident[EI_CLASS] != ELF_TARG_CLASS || /* Layout ? */ 257 ehdr->e_ident[EI_DATA] != ELF_TARG_DATA || 258 ehdr->e_ident[EI_VERSION] != EV_CURRENT) /* Version ? */ { 259 err = EFTYPE; 260 goto error; 261 } 262 263 err = elf_header_convert(ehdr); 264 if (err) 265 goto error; 266 267 if (ehdr->e_version != EV_CURRENT || ehdr->e_machine != ELF_TARG_MACH) { 268 /* Machine ? */ 269 err = EFTYPE; 270 goto error; 271 } 272 273 #if defined(LOADER_VERIEXEC) && !defined(LOADER_VERIEXEC_VECTX) 274 if (verify_file(ef->fd, filename, bytes_read, VE_MUST, __func__) < 0) { 275 err = EAUTH; 276 goto error; 277 } 278 #endif 279 return (0); 280 281 error: 282 if (ef->firstpage != NULL) { 283 free(ef->firstpage); 284 ef->firstpage = NULL; 285 } 286 if (ef->fd != -1) { 287 #ifdef LOADER_VERIEXEC_VECTX 288 free(ef->vctx); 289 #endif 290 close(ef->fd); 291 ef->fd = -1; 292 } 293 return (err); 294 } 295 296 /* 297 * Attempt to load the file (file) as an ELF module. It will be stored at 298 * (dest), and a pointer to a module structure describing the loaded object 299 * will be saved in (result). 300 */ 301 int 302 __elfN(loadfile)(char *filename, uint64_t dest, struct preloaded_file **result) 303 { 304 return (__elfN(loadfile_raw)(filename, dest, result, 0)); 305 } 306 307 int 308 __elfN(loadfile_raw)(char *filename, uint64_t dest, 309 struct preloaded_file **result, int multiboot) 310 { 311 struct preloaded_file *fp, *kfp; 312 struct elf_file ef; 313 Elf_Ehdr *ehdr; 314 int err; 315 316 fp = NULL; 317 bzero(&ef, sizeof(struct elf_file)); 318 ef.fd = -1; 319 320 err = __elfN(load_elf_header)(filename, &ef); 321 if (err != 0) 322 return (err); 323 324 ehdr = ef.ehdr; 325 326 /* 327 * Check to see what sort of module we are. 328 */ 329 kfp = file_findfile(NULL, __elfN(kerneltype)); 330 #ifdef __powerpc__ 331 /* 332 * Kernels can be ET_DYN, so just assume the first loaded object is the 333 * kernel. This assumption will be checked later. 334 */ 335 if (kfp == NULL) 336 ef.kernel = 1; 337 #endif 338 if (ef.kernel || ehdr->e_type == ET_EXEC) { 339 /* Looks like a kernel */ 340 if (kfp != NULL) { 341 printf("elf" __XSTRING(__ELF_WORD_SIZE) 342 "_loadfile: kernel already loaded\n"); 343 err = EPERM; 344 goto oerr; 345 } 346 /* 347 * Calculate destination address based on kernel entrypoint. 348 * 349 * For ARM, the destination address is independent of any values 350 * in the elf header (an ARM kernel can be loaded at any 2MB 351 * boundary), so we leave dest set to the value calculated by 352 * archsw.arch_loadaddr() and passed in to this function. 353 */ 354 #ifndef __arm__ 355 if (ehdr->e_type == ET_EXEC) 356 dest = (ehdr->e_entry & ~PAGE_MASK); 357 #endif 358 if ((ehdr->e_entry & ~PAGE_MASK) == 0) { 359 printf("elf" __XSTRING(__ELF_WORD_SIZE) 360 "_loadfile: not a kernel (maybe static binary?)\n"); 361 err = EPERM; 362 goto oerr; 363 } 364 ef.kernel = 1; 365 366 } else if (ehdr->e_type == ET_DYN) { 367 /* Looks like a kld module */ 368 if (multiboot != 0) { 369 printf("elf" __XSTRING(__ELF_WORD_SIZE) 370 "_loadfile: can't load module as multiboot\n"); 371 err = EPERM; 372 goto oerr; 373 } 374 if (kfp == NULL) { 375 printf("elf" __XSTRING(__ELF_WORD_SIZE) 376 "_loadfile: can't load module before kernel\n"); 377 err = EPERM; 378 goto oerr; 379 } 380 if (strcmp(__elfN(kerneltype), kfp->f_type)) { 381 printf("elf" __XSTRING(__ELF_WORD_SIZE) 382 "_loadfile: can't load module with kernel type '%s'\n", 383 kfp->f_type); 384 err = EPERM; 385 goto oerr; 386 } 387 /* Looks OK, got ahead */ 388 ef.kernel = 0; 389 390 } else { 391 err = EFTYPE; 392 goto oerr; 393 } 394 395 if (archsw.arch_loadaddr != NULL) 396 dest = archsw.arch_loadaddr(LOAD_ELF, ehdr, dest); 397 else 398 dest = roundup(dest, PAGE_SIZE); 399 400 /* 401 * Ok, we think we should handle this. 402 */ 403 fp = file_alloc(); 404 if (fp == NULL) { 405 printf("elf" __XSTRING(__ELF_WORD_SIZE) 406 "_loadfile: cannot allocate module info\n"); 407 err = EPERM; 408 goto out; 409 } 410 if (ef.kernel == 1 && multiboot == 0) 411 setenv("kernelname", filename, 1); 412 fp->f_name = strdup(filename); 413 if (multiboot == 0) 414 fp->f_type = strdup(ef.kernel ? 415 __elfN(kerneltype) : __elfN(moduletype)); 416 else 417 fp->f_type = strdup("elf multiboot kernel"); 418 419 #ifdef ELF_VERBOSE 420 if (ef.kernel) 421 printf("%s entry at 0x%jx\n", filename, 422 (uintmax_t)ehdr->e_entry); 423 #else 424 printf("%s ", filename); 425 #endif 426 427 fp->f_size = __elfN(loadimage)(fp, &ef, dest); 428 if (fp->f_size == 0 || fp->f_addr == 0) 429 goto ioerr; 430 431 /* save exec header as metadata */ 432 file_addmetadata(fp, MODINFOMD_ELFHDR, sizeof(*ehdr), ehdr); 433 434 /* Load OK, return module pointer */ 435 *result = (struct preloaded_file *)fp; 436 err = 0; 437 goto out; 438 439 ioerr: 440 err = EIO; 441 oerr: 442 file_discard(fp); 443 out: 444 if (ef.firstpage) 445 free(ef.firstpage); 446 if (ef.fd != -1) { 447 #ifdef LOADER_VERIEXEC_VECTX 448 if (!err && ef.vctx) { 449 int verror; 450 451 verror = vectx_close(ef.vctx, VE_MUST, __func__); 452 if (verror) { 453 err = EAUTH; 454 file_discard(fp); 455 } 456 } 457 #endif 458 close(ef.fd); 459 } 460 return (err); 461 } 462 463 /* 464 * With the file (fd) open on the image, and (ehdr) containing 465 * the Elf header, load the image at (off) 466 */ 467 static int 468 __elfN(loadimage)(struct preloaded_file *fp, elf_file_t ef, uint64_t off) 469 { 470 int i; 471 u_int j; 472 Elf_Ehdr *ehdr; 473 Elf_Phdr *phdr, *php; 474 Elf_Shdr *shdr; 475 char *shstr; 476 int ret; 477 vm_offset_t firstaddr; 478 vm_offset_t lastaddr; 479 size_t chunk; 480 ssize_t result; 481 Elf_Addr ssym, esym; 482 Elf_Dyn *dp; 483 Elf_Addr adp; 484 Elf_Addr ctors; 485 int ndp; 486 int symstrindex; 487 int symtabindex; 488 Elf_Size size; 489 u_int fpcopy; 490 Elf_Sym sym; 491 Elf_Addr p_start, p_end; 492 493 dp = NULL; 494 shdr = NULL; 495 ret = 0; 496 firstaddr = lastaddr = 0; 497 ehdr = ef->ehdr; 498 #ifdef __powerpc__ 499 if (ef->kernel) { 500 #else 501 if (ehdr->e_type == ET_EXEC) { 502 #endif 503 #if defined(__i386__) || defined(__amd64__) 504 #if __ELF_WORD_SIZE == 64 505 /* x86_64 relocates after locore */ 506 off = - (off & 0xffffffffff000000ull); 507 #else 508 /* i386 relocates after locore */ 509 off = - (off & 0xff000000u); 510 #endif 511 #elif defined(__powerpc__) 512 /* 513 * On the purely virtual memory machines like e500, the kernel 514 * is linked against its final VA range, which is most often 515 * not available at the loader stage, but only after kernel 516 * initializes and completes its VM settings. In such cases we 517 * cannot use p_vaddr field directly to load ELF segments, but 518 * put them at some 'load-time' locations. 519 */ 520 if (off & 0xf0000000u) { 521 off = -(off & 0xf0000000u); 522 /* 523 * XXX the physical load address should not be 524 * hardcoded. Note that the Book-E kernel assumes that 525 * it's loaded at a 16MB boundary for now... 526 */ 527 off += 0x01000000; 528 } 529 ehdr->e_entry += off; 530 #ifdef ELF_VERBOSE 531 printf("Converted entry 0x%jx\n", (uintmax_t)ehdr->e_entry); 532 #endif 533 #elif defined(__arm__) && !defined(EFI) 534 /* 535 * The elf headers in arm kernels specify virtual addresses in 536 * all header fields, even the ones that should be physical 537 * addresses. We assume the entry point is in the first page, 538 * and masking the page offset will leave us with the virtual 539 * address the kernel was linked at. We subtract that from the 540 * load offset, making 'off' into the value which, when added 541 * to a virtual address in an elf header, translates it to a 542 * physical address. We do the va->pa conversion on the entry 543 * point address in the header now, so that later we can launch 544 * the kernel by just jumping to that address. 545 * 546 * When booting from UEFI the copyin and copyout functions 547 * handle adjusting the location relative to the first virtual 548 * address. Because of this there is no need to adjust the 549 * offset or entry point address as these will both be handled 550 * by the efi code. 551 */ 552 off -= ehdr->e_entry & ~PAGE_MASK; 553 ehdr->e_entry += off; 554 #ifdef ELF_VERBOSE 555 printf("ehdr->e_entry 0x%jx, va<->pa off %llx\n", 556 (uintmax_t)ehdr->e_entry, off); 557 #endif 558 #else 559 off = 0; /* other archs use direct mapped kernels */ 560 #endif 561 } 562 ef->off = off; 563 564 if (ef->kernel) 565 __elfN(relocation_offset) = off; 566 567 if ((ehdr->e_phoff + ehdr->e_phnum * sizeof(*phdr)) > ef->firstlen) { 568 printf("elf" __XSTRING(__ELF_WORD_SIZE) 569 "_loadimage: program header not within first page\n"); 570 goto out; 571 } 572 phdr = (Elf_Phdr *)(ef->firstpage + ehdr->e_phoff); 573 574 for (i = 0; i < ehdr->e_phnum; i++) { 575 if (elf_program_header_convert(ehdr, phdr)) 576 continue; 577 578 /* We want to load PT_LOAD segments only.. */ 579 if (phdr[i].p_type != PT_LOAD) 580 continue; 581 582 #ifdef ELF_VERBOSE 583 printf("Segment: 0x%lx@0x%lx -> 0x%lx-0x%lx", 584 (long)phdr[i].p_filesz, (long)phdr[i].p_offset, 585 (long)(phdr[i].p_vaddr + off), 586 (long)(phdr[i].p_vaddr + off + phdr[i].p_memsz - 1)); 587 #else 588 if ((phdr[i].p_flags & PF_W) == 0) { 589 printf("text=0x%lx ", (long)phdr[i].p_filesz); 590 } else { 591 printf("data=0x%lx", (long)phdr[i].p_filesz); 592 if (phdr[i].p_filesz < phdr[i].p_memsz) 593 printf("+0x%lx", (long)(phdr[i].p_memsz - 594 phdr[i].p_filesz)); 595 printf(" "); 596 } 597 #endif 598 fpcopy = 0; 599 if (ef->firstlen > phdr[i].p_offset) { 600 fpcopy = ef->firstlen - phdr[i].p_offset; 601 archsw.arch_copyin(ef->firstpage + phdr[i].p_offset, 602 phdr[i].p_vaddr + off, fpcopy); 603 } 604 if (phdr[i].p_filesz > fpcopy) { 605 if (kern_pread(VECTX_HANDLE(ef), 606 phdr[i].p_vaddr + off + fpcopy, 607 phdr[i].p_filesz - fpcopy, 608 phdr[i].p_offset + fpcopy) != 0) { 609 printf("\nelf" __XSTRING(__ELF_WORD_SIZE) 610 "_loadimage: read failed\n"); 611 goto out; 612 } 613 } 614 /* clear space from oversized segments; eg: bss */ 615 if (phdr[i].p_filesz < phdr[i].p_memsz) { 616 #ifdef ELF_VERBOSE 617 printf(" (bss: 0x%lx-0x%lx)", 618 (long)(phdr[i].p_vaddr + off + phdr[i].p_filesz), 619 (long)(phdr[i].p_vaddr + off + phdr[i].p_memsz -1)); 620 #endif 621 622 kern_bzero(phdr[i].p_vaddr + off + phdr[i].p_filesz, 623 phdr[i].p_memsz - phdr[i].p_filesz); 624 } 625 #ifdef ELF_VERBOSE 626 printf("\n"); 627 #endif 628 629 if (archsw.arch_loadseg != NULL) 630 archsw.arch_loadseg(ehdr, phdr + i, off); 631 632 if (firstaddr == 0 || firstaddr > (phdr[i].p_vaddr + off)) 633 firstaddr = phdr[i].p_vaddr + off; 634 if (lastaddr == 0 || lastaddr < 635 (phdr[i].p_vaddr + off + phdr[i].p_memsz)) 636 lastaddr = phdr[i].p_vaddr + off + phdr[i].p_memsz; 637 } 638 lastaddr = roundup(lastaddr, sizeof(long)); 639 640 /* 641 * Get the section headers. We need this for finding the .ctors 642 * section as well as for loading any symbols. Both may be hard 643 * to do if reading from a .gz file as it involves seeking. I 644 * think the rule is going to have to be that you must strip a 645 * file to remove symbols before gzipping it. 646 */ 647 chunk = (size_t)ehdr->e_shnum * (size_t)ehdr->e_shentsize; 648 if (chunk == 0 || ehdr->e_shoff == 0) 649 goto nosyms; 650 shdr = alloc_pread(VECTX_HANDLE(ef), ehdr->e_shoff, chunk); 651 if (shdr == NULL) { 652 printf("\nelf" __XSTRING(__ELF_WORD_SIZE) 653 "_loadimage: failed to read section headers"); 654 goto nosyms; 655 } 656 657 for (i = 0; i < ehdr->e_shnum; i++) 658 elf_section_header_convert(ehdr, &shdr[i]); 659 660 file_addmetadata(fp, MODINFOMD_SHDR, chunk, shdr); 661 662 /* 663 * Read the section string table and look for the .ctors section. 664 * We need to tell the kernel where it is so that it can call the 665 * ctors. 666 */ 667 chunk = shdr[ehdr->e_shstrndx].sh_size; 668 if (chunk) { 669 shstr = alloc_pread(VECTX_HANDLE(ef), 670 shdr[ehdr->e_shstrndx].sh_offset, chunk); 671 if (shstr) { 672 for (i = 0; i < ehdr->e_shnum; i++) { 673 if (strcmp(shstr + shdr[i].sh_name, 674 ".ctors") != 0) 675 continue; 676 ctors = shdr[i].sh_addr; 677 file_addmetadata(fp, MODINFOMD_CTORS_ADDR, 678 sizeof(ctors), &ctors); 679 size = shdr[i].sh_size; 680 file_addmetadata(fp, MODINFOMD_CTORS_SIZE, 681 sizeof(size), &size); 682 break; 683 } 684 free(shstr); 685 } 686 } 687 688 /* 689 * Now load any symbols. 690 */ 691 symtabindex = -1; 692 symstrindex = -1; 693 for (i = 0; i < ehdr->e_shnum; i++) { 694 if (shdr[i].sh_type != SHT_SYMTAB) 695 continue; 696 for (j = 0; j < ehdr->e_phnum; j++) { 697 if (phdr[j].p_type != PT_LOAD) 698 continue; 699 if (shdr[i].sh_offset >= phdr[j].p_offset && 700 (shdr[i].sh_offset + shdr[i].sh_size <= 701 phdr[j].p_offset + phdr[j].p_filesz)) { 702 shdr[i].sh_offset = 0; 703 shdr[i].sh_size = 0; 704 break; 705 } 706 } 707 if (shdr[i].sh_offset == 0 || shdr[i].sh_size == 0) 708 continue; /* alread loaded in a PT_LOAD above */ 709 /* Save it for loading below */ 710 symtabindex = i; 711 symstrindex = shdr[i].sh_link; 712 } 713 if (symtabindex < 0 || symstrindex < 0) 714 goto nosyms; 715 716 /* Ok, committed to a load. */ 717 #ifndef ELF_VERBOSE 718 printf("syms=["); 719 #endif 720 ssym = lastaddr; 721 for (i = symtabindex; i >= 0; i = symstrindex) { 722 #ifdef ELF_VERBOSE 723 char *secname; 724 725 switch(shdr[i].sh_type) { 726 case SHT_SYMTAB: /* Symbol table */ 727 secname = "symtab"; 728 break; 729 case SHT_STRTAB: /* String table */ 730 secname = "strtab"; 731 break; 732 default: 733 secname = "WHOA!!"; 734 break; 735 } 736 #endif 737 size = shdr[i].sh_size; 738 #if defined(__powerpc__) 739 #if __ELF_WORD_SIZE == 64 740 size = htobe64(size); 741 #else 742 size = htobe32(size); 743 #endif 744 #endif 745 746 archsw.arch_copyin(&size, lastaddr, sizeof(size)); 747 lastaddr += sizeof(size); 748 749 #ifdef ELF_VERBOSE 750 printf("\n%s: 0x%jx@0x%jx -> 0x%jx-0x%jx", secname, 751 (uintmax_t)shdr[i].sh_size, (uintmax_t)shdr[i].sh_offset, 752 (uintmax_t)lastaddr, 753 (uintmax_t)(lastaddr + shdr[i].sh_size)); 754 #else 755 if (i == symstrindex) 756 printf("+"); 757 printf("0x%lx+0x%lx", (long)sizeof(size), (long)size); 758 #endif 759 760 if (VECTX_LSEEK(VECTX_HANDLE(ef), (off_t)shdr[i].sh_offset, SEEK_SET) == -1) { 761 printf("\nelf" __XSTRING(__ELF_WORD_SIZE) 762 "_loadimage: could not seek for symbols - skipped!"); 763 lastaddr = ssym; 764 ssym = 0; 765 goto nosyms; 766 } 767 result = archsw.arch_readin(VECTX_HANDLE(ef), lastaddr, shdr[i].sh_size); 768 if (result < 0 || (size_t)result != shdr[i].sh_size) { 769 printf("\nelf" __XSTRING(__ELF_WORD_SIZE) 770 "_loadimage: could not read symbols - skipped! " 771 "(%ju != %ju)", (uintmax_t)result, 772 (uintmax_t)shdr[i].sh_size); 773 lastaddr = ssym; 774 ssym = 0; 775 goto nosyms; 776 } 777 /* Reset offsets relative to ssym */ 778 lastaddr += shdr[i].sh_size; 779 lastaddr = roundup(lastaddr, sizeof(size)); 780 if (i == symtabindex) 781 symtabindex = -1; 782 else if (i == symstrindex) 783 symstrindex = -1; 784 } 785 esym = lastaddr; 786 #ifndef ELF_VERBOSE 787 printf("]"); 788 #endif 789 790 #if defined(__powerpc__) 791 /* On PowerPC we always need to provide BE data to the kernel */ 792 #if __ELF_WORD_SIZE == 64 793 ssym = htobe64((uint64_t)ssym); 794 esym = htobe64((uint64_t)esym); 795 #else 796 ssym = htobe32((uint32_t)ssym); 797 esym = htobe32((uint32_t)esym); 798 #endif 799 #endif 800 801 file_addmetadata(fp, MODINFOMD_SSYM, sizeof(ssym), &ssym); 802 file_addmetadata(fp, MODINFOMD_ESYM, sizeof(esym), &esym); 803 804 nosyms: 805 printf("\n"); 806 807 ret = lastaddr - firstaddr; 808 fp->f_addr = firstaddr; 809 810 php = NULL; 811 for (i = 0; i < ehdr->e_phnum; i++) { 812 if (phdr[i].p_type == PT_DYNAMIC) { 813 php = phdr + i; 814 adp = php->p_vaddr; 815 file_addmetadata(fp, MODINFOMD_DYNAMIC, sizeof(adp), 816 &adp); 817 break; 818 } 819 } 820 821 if (php == NULL) /* this is bad, we cannot get to symbols or _DYNAMIC */ 822 goto out; 823 824 ndp = php->p_filesz / sizeof(Elf_Dyn); 825 if (ndp == 0) 826 goto out; 827 dp = malloc(php->p_filesz); 828 if (dp == NULL) 829 goto out; 830 archsw.arch_copyout(php->p_vaddr + off, dp, php->p_filesz); 831 832 ef->strsz = 0; 833 for (i = 0; i < ndp; i++) { 834 if (dp[i].d_tag == 0) 835 break; 836 switch (dp[i].d_tag) { 837 case DT_HASH: 838 ef->hashtab = 839 (Elf_Hashelt*)(uintptr_t)(dp[i].d_un.d_ptr + off); 840 break; 841 case DT_STRTAB: 842 ef->strtab = 843 (char *)(uintptr_t)(dp[i].d_un.d_ptr + off); 844 break; 845 case DT_STRSZ: 846 ef->strsz = dp[i].d_un.d_val; 847 break; 848 case DT_SYMTAB: 849 ef->symtab = 850 (Elf_Sym *)(uintptr_t)(dp[i].d_un.d_ptr + off); 851 break; 852 case DT_REL: 853 ef->rel = 854 (Elf_Rel *)(uintptr_t)(dp[i].d_un.d_ptr + off); 855 break; 856 case DT_RELSZ: 857 ef->relsz = dp[i].d_un.d_val; 858 break; 859 case DT_RELA: 860 ef->rela = 861 (Elf_Rela *)(uintptr_t)(dp[i].d_un.d_ptr + off); 862 break; 863 case DT_RELASZ: 864 ef->relasz = dp[i].d_un.d_val; 865 break; 866 default: 867 break; 868 } 869 } 870 if (ef->hashtab == NULL || ef->symtab == NULL || 871 ef->strtab == NULL || ef->strsz == 0) 872 goto out; 873 COPYOUT(ef->hashtab, &ef->nbuckets, sizeof(ef->nbuckets)); 874 COPYOUT(ef->hashtab + 1, &ef->nchains, sizeof(ef->nchains)); 875 ef->buckets = ef->hashtab + 2; 876 ef->chains = ef->buckets + ef->nbuckets; 877 878 if (!gfx_state.tg_kernel_supported && 879 __elfN(lookup_symbol)(ef, "__start_set_vt_drv_set", &sym, 880 STT_NOTYPE) == 0) { 881 p_start = sym.st_value + ef->off; 882 if (__elfN(lookup_symbol)(ef, "__stop_set_vt_drv_set", &sym, 883 STT_NOTYPE) == 0) { 884 p_end = sym.st_value + ef->off; 885 gfx_state.tg_kernel_supported = 886 __elfN(parse_vt_drv_set)(fp, ef, p_start, p_end); 887 } 888 } 889 890 if (__elfN(lookup_symbol)(ef, "__start_set_modmetadata_set", &sym, 891 STT_NOTYPE) != 0) 892 return 0; 893 p_start = sym.st_value + ef->off; 894 if (__elfN(lookup_symbol)(ef, "__stop_set_modmetadata_set", &sym, 895 STT_NOTYPE) != 0) 896 return 0; 897 p_end = sym.st_value + ef->off; 898 899 if (__elfN(parse_modmetadata)(fp, ef, p_start, p_end) == 0) 900 goto out; 901 902 if (ef->kernel) /* kernel must not depend on anything */ 903 goto out; 904 905 out: 906 if (dp) 907 free(dp); 908 if (shdr) 909 free(shdr); 910 return ret; 911 } 912 913 static char invalid_name[] = "bad"; 914 915 char * 916 fake_modname(const char *name) 917 { 918 const char *sp, *ep; 919 char *fp; 920 size_t len; 921 922 sp = strrchr(name, '/'); 923 if (sp) 924 sp++; 925 else 926 sp = name; 927 928 ep = strrchr(sp, '.'); 929 if (ep == NULL) { 930 ep = sp + strlen(sp); 931 } 932 if (ep == sp) { 933 sp = invalid_name; 934 ep = invalid_name + sizeof(invalid_name) - 1; 935 } 936 937 len = ep - sp; 938 fp = malloc(len + 1); 939 if (fp == NULL) 940 return NULL; 941 memcpy(fp, sp, len); 942 fp[len] = '\0'; 943 return fp; 944 } 945 946 #if (defined(__i386__) || defined(__powerpc__)) && __ELF_WORD_SIZE == 64 947 struct mod_metadata64 { 948 int md_version; /* structure version MDTV_* */ 949 int md_type; /* type of entry MDT_* */ 950 uint64_t md_data; /* specific data */ 951 uint64_t md_cval; /* common string label */ 952 }; 953 #endif 954 #if defined(__amd64__) && __ELF_WORD_SIZE == 32 955 struct mod_metadata32 { 956 int md_version; /* structure version MDTV_* */ 957 int md_type; /* type of entry MDT_* */ 958 uint32_t md_data; /* specific data */ 959 uint32_t md_cval; /* common string label */ 960 }; 961 #endif 962 963 int 964 __elfN(load_modmetadata)(struct preloaded_file *fp, uint64_t dest) 965 { 966 struct elf_file ef; 967 int err, i, j; 968 Elf_Shdr *sh_meta, *shdr = NULL; 969 Elf_Shdr *sh_data[2]; 970 char *shstrtab = NULL; 971 size_t size; 972 Elf_Addr p_start, p_end; 973 974 bzero(&ef, sizeof(struct elf_file)); 975 ef.fd = -1; 976 977 err = __elfN(load_elf_header)(fp->f_name, &ef); 978 if (err != 0) 979 goto out; 980 981 if (ef.kernel == 1 || ef.ehdr->e_type == ET_EXEC) { 982 ef.kernel = 1; 983 } else if (ef.ehdr->e_type != ET_DYN) { 984 err = EFTYPE; 985 goto out; 986 } 987 988 size = (size_t)ef.ehdr->e_shnum * (size_t)ef.ehdr->e_shentsize; 989 shdr = alloc_pread(VECTX_HANDLE(&ef), ef.ehdr->e_shoff, size); 990 if (shdr == NULL) { 991 err = ENOMEM; 992 goto out; 993 } 994 995 /* Load shstrtab. */ 996 shstrtab = alloc_pread(VECTX_HANDLE(&ef), shdr[ef.ehdr->e_shstrndx].sh_offset, 997 shdr[ef.ehdr->e_shstrndx].sh_size); 998 if (shstrtab == NULL) { 999 printf("\nelf" __XSTRING(__ELF_WORD_SIZE) 1000 "load_modmetadata: unable to load shstrtab\n"); 1001 err = EFTYPE; 1002 goto out; 1003 } 1004 1005 /* Find set_modmetadata_set and data sections. */ 1006 sh_data[0] = sh_data[1] = sh_meta = NULL; 1007 for (i = 0, j = 0; i < ef.ehdr->e_shnum; i++) { 1008 if (strcmp(&shstrtab[shdr[i].sh_name], 1009 "set_modmetadata_set") == 0) { 1010 sh_meta = &shdr[i]; 1011 } 1012 if ((strcmp(&shstrtab[shdr[i].sh_name], ".data") == 0) || 1013 (strcmp(&shstrtab[shdr[i].sh_name], ".rodata") == 0)) { 1014 sh_data[j++] = &shdr[i]; 1015 } 1016 } 1017 if (sh_meta == NULL || sh_data[0] == NULL || sh_data[1] == NULL) { 1018 printf("\nelf" __XSTRING(__ELF_WORD_SIZE) 1019 "load_modmetadata: unable to find set_modmetadata_set or data sections\n"); 1020 err = EFTYPE; 1021 goto out; 1022 } 1023 1024 /* Load set_modmetadata_set into memory */ 1025 err = kern_pread(VECTX_HANDLE(&ef), dest, sh_meta->sh_size, sh_meta->sh_offset); 1026 if (err != 0) { 1027 printf("\nelf" __XSTRING(__ELF_WORD_SIZE) 1028 "load_modmetadata: unable to load set_modmetadata_set: %d\n", err); 1029 goto out; 1030 } 1031 p_start = dest; 1032 p_end = dest + sh_meta->sh_size; 1033 dest += sh_meta->sh_size; 1034 1035 /* Load data sections into memory. */ 1036 err = kern_pread(VECTX_HANDLE(&ef), dest, sh_data[0]->sh_size, 1037 sh_data[0]->sh_offset); 1038 if (err != 0) { 1039 printf("\nelf" __XSTRING(__ELF_WORD_SIZE) 1040 "load_modmetadata: unable to load data: %d\n", err); 1041 goto out; 1042 } 1043 1044 /* 1045 * We have to increment the dest, so that the offset is the same into 1046 * both the .rodata and .data sections. 1047 */ 1048 ef.off = -(sh_data[0]->sh_addr - dest); 1049 dest += (sh_data[1]->sh_addr - sh_data[0]->sh_addr); 1050 1051 err = kern_pread(VECTX_HANDLE(&ef), dest, sh_data[1]->sh_size, 1052 sh_data[1]->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 err = __elfN(parse_modmetadata)(fp, &ef, p_start, p_end); 1060 if (err != 0) { 1061 printf("\nelf" __XSTRING(__ELF_WORD_SIZE) 1062 "load_modmetadata: unable to parse metadata: %d\n", err); 1063 goto out; 1064 } 1065 1066 out: 1067 if (shstrtab != NULL) 1068 free(shstrtab); 1069 if (shdr != NULL) 1070 free(shdr); 1071 if (ef.firstpage != NULL) 1072 free(ef.firstpage); 1073 if (ef.fd != -1) { 1074 #ifdef LOADER_VERIEXEC_VECTX 1075 if (!err && ef.vctx) { 1076 int verror; 1077 1078 verror = vectx_close(ef.vctx, VE_MUST, __func__); 1079 if (verror) { 1080 err = EAUTH; 1081 file_discard(fp); 1082 } 1083 } 1084 #endif 1085 close(ef.fd); 1086 } 1087 return (err); 1088 } 1089 1090 /* 1091 * Walk through vt_drv_set, each vt driver structure starts with 1092 * static 16 chars for driver name. If we have "vbefb", return true. 1093 */ 1094 static bool 1095 __elfN(parse_vt_drv_set)(struct preloaded_file *fp, elf_file_t ef, 1096 Elf_Addr p_start, Elf_Addr p_end) 1097 { 1098 Elf_Addr v, p; 1099 char vd_name[16]; 1100 int error; 1101 1102 p = p_start; 1103 while (p < p_end) { 1104 COPYOUT(p, &v, sizeof(v)); 1105 1106 error = __elfN(reloc_ptr)(fp, ef, p, &v, sizeof(v)); 1107 if (error == EOPNOTSUPP) 1108 v += ef->off; 1109 else if (error != 0) 1110 return (false); 1111 COPYOUT(v, &vd_name, sizeof(vd_name)); 1112 if (strncmp(vd_name, "vbefb", sizeof(vd_name)) == 0) 1113 return (true); 1114 p += sizeof(Elf_Addr); 1115 } 1116 1117 return (false); 1118 } 1119 1120 int 1121 __elfN(parse_modmetadata)(struct preloaded_file *fp, elf_file_t ef, 1122 Elf_Addr p_start, Elf_Addr p_end) 1123 { 1124 struct mod_metadata md; 1125 #if (defined(__i386__) || defined(__powerpc__)) && __ELF_WORD_SIZE == 64 1126 struct mod_metadata64 md64; 1127 #elif defined(__amd64__) && __ELF_WORD_SIZE == 32 1128 struct mod_metadata32 md32; 1129 #endif 1130 struct mod_depend *mdepend; 1131 struct mod_version mver; 1132 char *s; 1133 int error, modcnt, minfolen; 1134 Elf_Addr v, p; 1135 1136 modcnt = 0; 1137 p = p_start; 1138 while (p < p_end) { 1139 COPYOUT(p, &v, sizeof(v)); 1140 error = __elfN(reloc_ptr)(fp, ef, p, &v, sizeof(v)); 1141 if (error == EOPNOTSUPP) 1142 v += ef->off; 1143 else if (error != 0) 1144 return (error); 1145 #if (defined(__i386__) || defined(__powerpc__)) && __ELF_WORD_SIZE == 64 1146 COPYOUT(v, &md64, sizeof(md64)); 1147 error = __elfN(reloc_ptr)(fp, ef, v, &md64, sizeof(md64)); 1148 if (error == EOPNOTSUPP) { 1149 md64.md_cval += ef->off; 1150 md64.md_data += ef->off; 1151 } else if (error != 0) 1152 return (error); 1153 md.md_version = md64.md_version; 1154 md.md_type = md64.md_type; 1155 md.md_cval = (const char *)(uintptr_t)md64.md_cval; 1156 md.md_data = (void *)(uintptr_t)md64.md_data; 1157 #elif defined(__amd64__) && __ELF_WORD_SIZE == 32 1158 COPYOUT(v, &md32, sizeof(md32)); 1159 error = __elfN(reloc_ptr)(fp, ef, v, &md32, sizeof(md32)); 1160 if (error == EOPNOTSUPP) { 1161 md32.md_cval += ef->off; 1162 md32.md_data += ef->off; 1163 } else if (error != 0) 1164 return (error); 1165 md.md_version = md32.md_version; 1166 md.md_type = md32.md_type; 1167 md.md_cval = (const char *)(uintptr_t)md32.md_cval; 1168 md.md_data = (void *)(uintptr_t)md32.md_data; 1169 #else 1170 COPYOUT(v, &md, sizeof(md)); 1171 error = __elfN(reloc_ptr)(fp, ef, v, &md, sizeof(md)); 1172 if (error == EOPNOTSUPP) { 1173 md.md_cval += ef->off; 1174 md.md_data = (void *)((uintptr_t)md.md_data + 1175 (uintptr_t)ef->off); 1176 } else if (error != 0) 1177 return (error); 1178 #endif 1179 p += sizeof(Elf_Addr); 1180 switch(md.md_type) { 1181 case MDT_DEPEND: 1182 if (ef->kernel) /* kernel must not depend on anything */ 1183 break; 1184 s = strdupout((vm_offset_t)md.md_cval); 1185 minfolen = sizeof(*mdepend) + strlen(s) + 1; 1186 mdepend = malloc(minfolen); 1187 if (mdepend == NULL) 1188 return ENOMEM; 1189 COPYOUT((vm_offset_t)md.md_data, mdepend, 1190 sizeof(*mdepend)); 1191 strcpy((char*)(mdepend + 1), s); 1192 free(s); 1193 file_addmetadata(fp, MODINFOMD_DEPLIST, minfolen, 1194 mdepend); 1195 free(mdepend); 1196 break; 1197 case MDT_VERSION: 1198 s = strdupout((vm_offset_t)md.md_cval); 1199 COPYOUT((vm_offset_t)md.md_data, &mver, sizeof(mver)); 1200 file_addmodule(fp, s, mver.mv_version, NULL); 1201 free(s); 1202 modcnt++; 1203 break; 1204 } 1205 } 1206 if (modcnt == 0) { 1207 s = fake_modname(fp->f_name); 1208 file_addmodule(fp, s, 1, NULL); 1209 free(s); 1210 } 1211 return 0; 1212 } 1213 1214 static unsigned long 1215 elf_hash(const char *name) 1216 { 1217 const unsigned char *p = (const unsigned char *) name; 1218 unsigned long h = 0; 1219 unsigned long g; 1220 1221 while (*p != '\0') { 1222 h = (h << 4) + *p++; 1223 if ((g = h & 0xf0000000) != 0) 1224 h ^= g >> 24; 1225 h &= ~g; 1226 } 1227 return h; 1228 } 1229 1230 static const char __elfN(bad_symtable)[] = "elf" __XSTRING(__ELF_WORD_SIZE) 1231 "_lookup_symbol: corrupt symbol table\n"; 1232 int 1233 __elfN(lookup_symbol)(elf_file_t ef, const char* name, Elf_Sym *symp, 1234 unsigned char type) 1235 { 1236 Elf_Hashelt symnum; 1237 Elf_Sym sym; 1238 char *strp; 1239 unsigned long hash; 1240 1241 hash = elf_hash(name); 1242 COPYOUT(&ef->buckets[hash % ef->nbuckets], &symnum, sizeof(symnum)); 1243 1244 while (symnum != STN_UNDEF) { 1245 if (symnum >= ef->nchains) { 1246 printf(__elfN(bad_symtable)); 1247 return ENOENT; 1248 } 1249 1250 COPYOUT(ef->symtab + symnum, &sym, sizeof(sym)); 1251 if (sym.st_name == 0) { 1252 printf(__elfN(bad_symtable)); 1253 return ENOENT; 1254 } 1255 1256 strp = strdupout((vm_offset_t)(ef->strtab + sym.st_name)); 1257 if (strcmp(name, strp) == 0) { 1258 free(strp); 1259 if (sym.st_shndx != SHN_UNDEF || 1260 (sym.st_value != 0 && 1261 ELF_ST_TYPE(sym.st_info) == type)) { 1262 *symp = sym; 1263 return 0; 1264 } 1265 return ENOENT; 1266 } 1267 free(strp); 1268 COPYOUT(&ef->chains[symnum], &symnum, sizeof(symnum)); 1269 } 1270 return ENOENT; 1271 } 1272 1273 /* 1274 * Apply any intra-module relocations to the value. p is the load address 1275 * of the value and val/len is the value to be modified. This does NOT modify 1276 * the image in-place, because this is done by kern_linker later on. 1277 * 1278 * Returns EOPNOTSUPP if no relocation method is supplied. 1279 */ 1280 static int 1281 __elfN(reloc_ptr)(struct preloaded_file *mp, elf_file_t ef, 1282 Elf_Addr p, void *val, size_t len) 1283 { 1284 size_t n; 1285 Elf_Rela a; 1286 Elf_Rel r; 1287 int error; 1288 1289 /* 1290 * The kernel is already relocated, but we still want to apply 1291 * offset adjustments. 1292 */ 1293 if (ef->kernel) 1294 return (EOPNOTSUPP); 1295 1296 for (n = 0; n < ef->relsz / sizeof(r); n++) { 1297 COPYOUT(ef->rel + n, &r, sizeof(r)); 1298 1299 error = __elfN(reloc)(ef, __elfN(symaddr), &r, ELF_RELOC_REL, 1300 ef->off, p, val, len); 1301 if (error != 0) 1302 return (error); 1303 } 1304 for (n = 0; n < ef->relasz / sizeof(a); n++) { 1305 COPYOUT(ef->rela + n, &a, sizeof(a)); 1306 1307 error = __elfN(reloc)(ef, __elfN(symaddr), &a, ELF_RELOC_RELA, 1308 ef->off, p, val, len); 1309 if (error != 0) 1310 return (error); 1311 } 1312 1313 return (0); 1314 } 1315 1316 static Elf_Addr 1317 __elfN(symaddr)(struct elf_file *ef, Elf_Size symidx) 1318 { 1319 1320 /* Symbol lookup by index not required here. */ 1321 return (0); 1322 } 1323