stand/common/load_elf.c

   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 } *elf_file_t;
  75
  76 static int __elfN(loadimage)(struct preloaded_file *mp, elf_file_t ef,
  77     uint64_t loadaddr);
  78 static int __elfN(lookup_symbol)(struct preloaded_file *mp, elf_file_t ef,
  79     const char* name, Elf_Sym* sym);
  80 static int __elfN(reloc_ptr)(struct preloaded_file *mp, elf_file_t ef,
  81     Elf_Addr p, void *val, size_t len);
  82 static int __elfN(parse_modmetadata)(struct preloaded_file *mp, elf_file_t ef,
  83     Elf_Addr p_start, Elf_Addr p_end);
  84 static symaddr_fn __elfN(symaddr);
  85 static char     *fake_modname(const char *name);
  86
  87 const char      *__elfN(kerneltype) = "elf kernel";
  88 const char      *__elfN(moduletype) = "elf module";
  89
  90 uint64_t        __elfN(relocation_offset) = 0;
  91
  92 extern void elf_wrong_field_size(void);
  93 #define CONVERT_FIELD(b, f, e)                  \
  94         switch (sizeof((b)->f)) {               \
  95         case 2:                                 \
  96                 (b)->f = e ## 16toh((b)->f);    \
  97                 break;                          \
  98         case 4:                                 \
  99                 (b)->f = e ## 32toh((b)->f);    \
 100                 break;                          \
 101         case 8:                                 \
 102                 (b)->f = e ## 64toh((b)->f);    \
 103                 break;                          \
 104         default:                                \
 105                 /* Force a link time error. */  \
 106                 elf_wrong_field_size();         \
 107                 break;                          \
 108         }
 109
 110 #define CONVERT_SWITCH(h, d, f)                 \
 111         switch ((h)->e_ident[EI_DATA]) {        \
 112         case ELFDATA2MSB:                       \
 113                 f(d, be);                       \
 114                 break;                          \
 115         case ELFDATA2LSB:                       \
 116                 f(d, le);                       \
 117                 break;                          \
 118         default:                                \
 119                 return (EINVAL);                \
 120         }
 121
 122
 123 static int elf_header_convert(Elf_Ehdr *ehdr)
 124 {
 125         /*
 126          * Fixup ELF header endianness.
 127          *
 128          * The Xhdr structure was loaded using block read call to optimize file
 129          * accesses. It might happen, that the endianness of the system memory
 130          * is different that endianness of the ELF header.  Swap fields here to
 131          * guarantee that Xhdr always contain valid data regardless of
 132          * architecture.
 133          */
 134 #define HEADER_FIELDS(b, e)                     \
 135         CONVERT_FIELD(b, e_type, e);            \
 136         CONVERT_FIELD(b, e_machine, e);         \
 137         CONVERT_FIELD(b, e_version, e);         \
 138         CONVERT_FIELD(b, e_entry, e);           \
 139         CONVERT_FIELD(b, e_phoff, e);           \
 140         CONVERT_FIELD(b, e_shoff, e);           \
 141         CONVERT_FIELD(b, e_flags, e);           \
 142         CONVERT_FIELD(b, e_ehsize, e);          \
 143         CONVERT_FIELD(b, e_phentsize, e);       \
 144         CONVERT_FIELD(b, e_phnum, e);           \
 145         CONVERT_FIELD(b, e_shentsize, e);       \
 146         CONVERT_FIELD(b, e_shnum, e);           \
 147         CONVERT_FIELD(b, e_shstrndx, e)
 148
 149         CONVERT_SWITCH(ehdr, ehdr, HEADER_FIELDS);
 150
 151 #undef HEADER_FIELDS
 152
 153         return (0);
 154 }
 155
 156 static int elf_program_header_convert(const Elf_Ehdr *ehdr, Elf_Phdr *phdr)
 157 {
 158 #define PROGRAM_HEADER_FIELDS(b, e)             \
 159         CONVERT_FIELD(b, p_type, e);            \
 160         CONVERT_FIELD(b, p_flags, e);           \
 161         CONVERT_FIELD(b, p_offset, e);          \
 162         CONVERT_FIELD(b, p_vaddr, e);           \
 163         CONVERT_FIELD(b, p_paddr, e);           \
 164         CONVERT_FIELD(b, p_filesz, e);          \
 165         CONVERT_FIELD(b, p_memsz, e);           \
 166         CONVERT_FIELD(b, p_align, e)
 167
 168         CONVERT_SWITCH(ehdr, phdr, PROGRAM_HEADER_FIELDS);
 169
 170 #undef PROGRAM_HEADER_FIELDS
 171
 172         return (0);
 173 }
 174
 175 static int elf_section_header_convert(const Elf_Ehdr *ehdr, Elf_Shdr *shdr)
 176 {
 177 #define SECTION_HEADER_FIELDS(b, e)             \
 178         CONVERT_FIELD(b, sh_name, e);           \
 179         CONVERT_FIELD(b, sh_type, e);           \
 180         CONVERT_FIELD(b, sh_link, e);           \
 181         CONVERT_FIELD(b, sh_info, e);           \
 182         CONVERT_FIELD(b, sh_flags, e);          \
 183         CONVERT_FIELD(b, sh_addr, e);           \
 184         CONVERT_FIELD(b, sh_offset, e);         \
 185         CONVERT_FIELD(b, sh_size, e);           \
 186         CONVERT_FIELD(b, sh_addralign, e);      \
 187         CONVERT_FIELD(b, sh_entsize, e)
 188
 189         CONVERT_SWITCH(ehdr, shdr, SECTION_HEADER_FIELDS);
 190
 191 #undef SECTION_HEADER_FIELDS
 192
 193         return (0);
 194 }
 195 #undef CONVERT_SWITCH
 196 #undef CONVERT_FIELD
 197
 198 static int
 199 __elfN(load_elf_header)(char *filename, elf_file_t ef)
 200 {
 201         ssize_t                  bytes_read;
 202         Elf_Ehdr                *ehdr;
 203         int                      err;
 204
 205         /*
 206          * Open the image, read and validate the ELF header
 207          */
 208         if (filename == NULL)   /* can't handle nameless */
 209                 return (EFTYPE);
 210         if ((ef->fd = open(filename, O_RDONLY)) == -1)
 211                 return (errno);
 212         ef->firstpage = malloc(PAGE_SIZE);
 213         if (ef->firstpage == NULL) {
 214                 close(ef->fd);
 215                 return (ENOMEM);
 216         }
 217         bytes_read = read(ef->fd, ef->firstpage, PAGE_SIZE);
 218         ef->firstlen = (size_t)bytes_read;
 219         if (bytes_read < 0 || ef->firstlen <= sizeof(Elf_Ehdr)) {
 220                 err = EFTYPE; /* could be EIO, but may be small file */
 221                 goto error;
 222         }
 223         ehdr = ef->ehdr = (Elf_Ehdr *)ef->firstpage;
 224
 225         /* Is it ELF? */
 226         if (!IS_ELF(*ehdr)) {
 227                 err = EFTYPE;
 228                 goto error;
 229         }
 230
 231         if (ehdr->e_ident[EI_CLASS] != ELF_TARG_CLASS || /* Layout ? */
 232             ehdr->e_ident[EI_DATA] != ELF_TARG_DATA ||
 233             ehdr->e_ident[EI_VERSION] != EV_CURRENT) /* Version ? */ {
 234                 err = EFTYPE;
 235                 goto error;
 236         }
 237
 238         err = elf_header_convert(ehdr);
 239         if (err)
 240                 goto error;
 241
 242         if (ehdr->e_version != EV_CURRENT || ehdr->e_machine != ELF_TARG_MACH) {
 243                 /* Machine ? */
 244                 err = EFTYPE;
 245                 goto error;
 246         }
 247
 248 #ifdef LOADER_VERIEXEC
 249         if (verify_file(ef->fd, filename, bytes_read, VE_MUST) < 0) {
 250             err = EAUTH;
 251             goto error;
 252         }
 253 #endif
 254         return (0);
 255
 256 error:
 257         if (ef->firstpage != NULL) {
 258                 free(ef->firstpage);
 259                 ef->firstpage = NULL;
 260         }
 261         if (ef->fd != -1) {
 262                 close(ef->fd);
 263                 ef->fd = -1;
 264         }
 265         return (err);
 266 }
 267
 268 /*
 269  * Attempt to load the file (file) as an ELF module.  It will be stored at
 270  * (dest), and a pointer to a module structure describing the loaded object
 271  * will be saved in (result).
 272  */
 273 int
 274 __elfN(loadfile)(char *filename, uint64_t dest, struct preloaded_file **result)
 275 {
 276         return (__elfN(loadfile_raw)(filename, dest, result, 0));
 277 }
 278
 279 int
 280 __elfN(loadfile_raw)(char *filename, uint64_t dest,
 281     struct preloaded_file **result, int multiboot)
 282 {
 283         struct preloaded_file   *fp, *kfp;
 284         struct elf_file         ef;
 285         Elf_Ehdr                *ehdr;
 286         int                     err;
 287
 288         fp = NULL;
 289         bzero(&ef, sizeof(struct elf_file));
 290         ef.fd = -1;
 291
 292         err = __elfN(load_elf_header)(filename, &ef);
 293         if (err != 0)
 294                 return (err);
 295
 296         ehdr = ef.ehdr;
 297
 298         /*
 299          * Check to see what sort of module we are.
 300          */
 301         kfp = file_findfile(NULL, __elfN(kerneltype));
 302 #ifdef __powerpc__
 303         /*
 304          * Kernels can be ET_DYN, so just assume the first loaded object is the
 305          * kernel. This assumption will be checked later.
 306          */
 307         if (kfp == NULL)
 308                 ef.kernel = 1;
 309 #endif
 310         if (ef.kernel || ehdr->e_type == ET_EXEC) {
 311                 /* Looks like a kernel */
 312                 if (kfp != NULL) {
 313                         printf("elf" __XSTRING(__ELF_WORD_SIZE)
 314                             "_loadfile: kernel already loaded\n");
 315                         err = EPERM;
 316                         goto oerr;
 317                 }
 318                 /*
 319                  * Calculate destination address based on kernel entrypoint.
 320                  *
 321                  * For ARM, the destination address is independent of any values
 322                  * in the elf header (an ARM kernel can be loaded at any 2MB
 323                  * boundary), so we leave dest set to the value calculated by
 324                  * archsw.arch_loadaddr() and passed in to this function.
 325                  */
 326 #ifndef __arm__
 327                 if (ehdr->e_type == ET_EXEC)
 328                         dest = (ehdr->e_entry & ~PAGE_MASK);
 329 #endif
 330                 if ((ehdr->e_entry & ~PAGE_MASK) == 0) {
 331                         printf("elf" __XSTRING(__ELF_WORD_SIZE)
 332                             "_loadfile: not a kernel (maybe static binary?)\n");
 333                         err = EPERM;
 334                         goto oerr;
 335                 }
 336                 ef.kernel = 1;
 337
 338         } else if (ehdr->e_type == ET_DYN) {
 339                 /* Looks like a kld module */
 340                 if (multiboot != 0) {
 341                         printf("elf" __XSTRING(__ELF_WORD_SIZE)
 342                             "_loadfile: can't load module as multiboot\n");
 343                         err = EPERM;
 344                         goto oerr;
 345                 }
 346                 if (kfp == NULL) {
 347                         printf("elf" __XSTRING(__ELF_WORD_SIZE)
 348                             "_loadfile: can't load module before kernel\n");
 349                         err = EPERM;
 350                         goto oerr;
 351                 }
 352                 if (strcmp(__elfN(kerneltype), kfp->f_type)) {
 353                         printf("elf" __XSTRING(__ELF_WORD_SIZE)
 354                          "_loadfile: can't load module with kernel type '%s'\n",
 355                             kfp->f_type);
 356                         err = EPERM;
 357                         goto oerr;
 358                 }
 359                 /* Looks OK, got ahead */
 360                 ef.kernel = 0;
 361
 362         } else {
 363                 err = EFTYPE;
 364                 goto oerr;
 365         }
 366
 367         if (archsw.arch_loadaddr != NULL)
 368                 dest = archsw.arch_loadaddr(LOAD_ELF, ehdr, dest);
 369         else
 370                 dest = roundup(dest, PAGE_SIZE);
 371
 372         /*
 373          * Ok, we think we should handle this.
 374          */
 375         fp = file_alloc();
 376         if (fp == NULL) {
 377                 printf("elf" __XSTRING(__ELF_WORD_SIZE)
 378                     "_loadfile: cannot allocate module info\n");
 379                 err = EPERM;
 380                 goto out;
 381         }
 382         if (ef.kernel == 1 && multiboot == 0)
 383                 setenv("kernelname", filename, 1);
 384         fp->f_name = strdup(filename);
 385         if (multiboot == 0)
 386                 fp->f_type = strdup(ef.kernel ?
 387                     __elfN(kerneltype) : __elfN(moduletype));
 388         else
 389                 fp->f_type = strdup("elf multiboot kernel");
 390
 391 #ifdef ELF_VERBOSE
 392         if (ef.kernel)
 393                 printf("%s entry at 0x%jx\n", filename,
 394                     (uintmax_t)ehdr->e_entry);
 395 #else
 396         printf("%s ", filename);
 397 #endif
 398
 399         fp->f_size = __elfN(loadimage)(fp, &ef, dest);
 400         if (fp->f_size == 0 || fp->f_addr == 0)
 401                 goto ioerr;
 402
 403         /* save exec header as metadata */
 404         file_addmetadata(fp, MODINFOMD_ELFHDR, sizeof(*ehdr), ehdr);
 405
 406         /* Load OK, return module pointer */
 407         *result = (struct preloaded_file *)fp;
 408         err = 0;
 409         goto out;
 410
 411 ioerr:
 412         err = EIO;
 413 oerr:
 414         file_discard(fp);
 415 out:
 416         if (ef.firstpage)
 417                 free(ef.firstpage);
 418         if (ef.fd != -1)
 419                 close(ef.fd);
 420         return (err);
 421 }
 422
 423 /*
 424  * With the file (fd) open on the image, and (ehdr) containing
 425  * the Elf header, load the image at (off)
 426  */
 427 static int
 428 __elfN(loadimage)(struct preloaded_file *fp, elf_file_t ef, uint64_t off)
 429 {
 430         int             i;
 431         u_int           j;
 432         Elf_Ehdr        *ehdr;
 433         Elf_Phdr        *phdr, *php;
 434         Elf_Shdr        *shdr;
 435         char            *shstr;
 436         int             ret;
 437         vm_offset_t     firstaddr;
 438         vm_offset_t     lastaddr;
 439         size_t          chunk;
 440         ssize_t         result;
 441         Elf_Addr        ssym, esym;
 442         Elf_Dyn         *dp;
 443         Elf_Addr        adp;
 444         Elf_Addr        ctors;
 445         int             ndp;
 446         int             symstrindex;
 447         int             symtabindex;
 448         Elf_Size        size;
 449         u_int           fpcopy;
 450         Elf_Sym         sym;
 451         Elf_Addr        p_start, p_end;
 452
 453         dp = NULL;
 454         shdr = NULL;
 455         ret = 0;
 456         firstaddr = lastaddr = 0;
 457         ehdr = ef->ehdr;
 458         if (ehdr->e_type == ET_EXEC) {
 459 #if defined(__i386__) || defined(__amd64__)
 460 #if __ELF_WORD_SIZE == 64
 461                 /* x86_64 relocates after locore */
 462                 off = - (off & 0xffffffffff000000ull);
 463 #else
 464                 /* i386 relocates after locore */
 465                 off = - (off & 0xff000000u);
 466 #endif
 467 #elif defined(__powerpc__)
 468                 /*
 469                  * On the purely virtual memory machines like e500, the kernel
 470                  * is linked against its final VA range, which is most often
 471                  * not available at the loader stage, but only after kernel
 472                  * initializes and completes its VM settings. In such cases we
 473                  * cannot use p_vaddr field directly to load ELF segments, but
 474                  * put them at some 'load-time' locations.
 475                  */
 476                 if (off & 0xf0000000u) {
 477                         off = -(off & 0xf0000000u);
 478                         /*
 479                          * XXX the physical load address should not be
 480                          * hardcoded. Note that the Book-E kernel assumes that
 481                          * it's loaded at a 16MB boundary for now...
 482                          */
 483                         off += 0x01000000;
 484                         ehdr->e_entry += off;
 485 #ifdef ELF_VERBOSE
 486                         printf("Converted entry 0x%jx\n", (uintmax_t)ehdr->e_entry);
 487 #endif
 488                 } else
 489                         off = 0;
 490 #elif defined(__arm__) && !defined(EFI)
 491                 /*
 492                  * The elf headers in arm kernels specify virtual addresses in
 493                  * all header fields, even the ones that should be physical
 494                  * addresses.  We assume the entry point is in the first page,
 495                  * and masking the page offset will leave us with the virtual
 496                  * address the kernel was linked at.  We subtract that from the
 497                  * load offset, making 'off' into the value which, when added
 498                  * to a virtual address in an elf header, translates it to a
 499                  * physical address.  We do the va->pa conversion on the entry
 500                  * point address in the header now, so that later we can launch
 501                  * the kernel by just jumping to that address.
 502                  *
 503                  * When booting from UEFI the copyin and copyout functions
 504                  * handle adjusting the location relative to the first virtual
 505                  * address.  Because of this there is no need to adjust the
 506                  * offset or entry point address as these will both be handled
 507                  * by the efi code.
 508                  */
 509                 off -= ehdr->e_entry & ~PAGE_MASK;
 510                 ehdr->e_entry += off;
 511 #ifdef ELF_VERBOSE
 512                 printf("ehdr->e_entry 0x%jx, va<->pa off %llx\n",
 513                     (uintmax_t)ehdr->e_entry, off);
 514 #endif
 515 #else
 516                 off = 0;        /* other archs use direct mapped kernels */
 517 #endif
 518         }
 519         ef->off = off;
 520
 521         if (ef->kernel)
 522                 __elfN(relocation_offset) = off;
 523
 524         if ((ehdr->e_phoff + ehdr->e_phnum * sizeof(*phdr)) > ef->firstlen) {
 525                 printf("elf" __XSTRING(__ELF_WORD_SIZE)
 526                     "_loadimage: program header not within first page\n");
 527                 goto out;
 528         }
 529         phdr = (Elf_Phdr *)(ef->firstpage + ehdr->e_phoff);
 530
 531         for (i = 0; i < ehdr->e_phnum; i++) {
 532                 if (elf_program_header_convert(ehdr, phdr))
 533                         continue;
 534
 535                 /* We want to load PT_LOAD segments only.. */
 536                 if (phdr[i].p_type != PT_LOAD)
 537                         continue;
 538
 539 #ifdef ELF_VERBOSE
 540                 printf("Segment: 0x%lx@0x%lx -> 0x%lx-0x%lx",
 541                     (long)phdr[i].p_filesz, (long)phdr[i].p_offset,
 542                     (long)(phdr[i].p_vaddr + off),
 543                     (long)(phdr[i].p_vaddr + off + phdr[i].p_memsz - 1));
 544 #else
 545                 if ((phdr[i].p_flags & PF_W) == 0) {
 546                         printf("text=0x%lx ", (long)phdr[i].p_filesz);
 547                 } else {
 548                         printf("data=0x%lx", (long)phdr[i].p_filesz);
 549                         if (phdr[i].p_filesz < phdr[i].p_memsz)
 550                                 printf("+0x%lx", (long)(phdr[i].p_memsz -
 551                                     phdr[i].p_filesz));
 552                         printf(" ");
 553                 }
 554 #endif
 555                 fpcopy = 0;
 556                 if (ef->firstlen > phdr[i].p_offset) {
 557                         fpcopy = ef->firstlen - phdr[i].p_offset;
 558                         archsw.arch_copyin(ef->firstpage + phdr[i].p_offset,
 559                             phdr[i].p_vaddr + off, fpcopy);
 560                 }
 561                 if (phdr[i].p_filesz > fpcopy) {
 562                         if (kern_pread(ef->fd, phdr[i].p_vaddr + off + fpcopy,
 563                             phdr[i].p_filesz - fpcopy,
 564                             phdr[i].p_offset + fpcopy) != 0) {
 565                                 printf("\nelf" __XSTRING(__ELF_WORD_SIZE)
 566                                     "_loadimage: read failed\n");
 567                                 goto out;
 568                         }
 569                 }
 570                 /* clear space from oversized segments; eg: bss */
 571                 if (phdr[i].p_filesz < phdr[i].p_memsz) {
 572 #ifdef ELF_VERBOSE
 573                         printf(" (bss: 0x%lx-0x%lx)",
 574                             (long)(phdr[i].p_vaddr + off + phdr[i].p_filesz),
 575                             (long)(phdr[i].p_vaddr + off + phdr[i].p_memsz -1));
 576 #endif
 577
 578                         kern_bzero(phdr[i].p_vaddr + off + phdr[i].p_filesz,
 579                             phdr[i].p_memsz - phdr[i].p_filesz);
 580                 }
 581 #ifdef ELF_VERBOSE
 582                 printf("\n");
 583 #endif
 584
 585                 if (archsw.arch_loadseg != NULL)
 586                         archsw.arch_loadseg(ehdr, phdr + i, off);
 587
 588                 if (firstaddr == 0 || firstaddr > (phdr[i].p_vaddr + off))
 589                         firstaddr = phdr[i].p_vaddr + off;
 590                 if (lastaddr == 0 || lastaddr <
 591                     (phdr[i].p_vaddr + off + phdr[i].p_memsz))
 592                         lastaddr = phdr[i].p_vaddr + off + phdr[i].p_memsz;
 593         }
 594         lastaddr = roundup(lastaddr, sizeof(long));
 595
 596         /*
 597          * Get the section headers.  We need this for finding the .ctors
 598          * section as well as for loading any symbols.  Both may be hard
 599          * to do if reading from a .gz file as it involves seeking.  I
 600          * think the rule is going to have to be that you must strip a
 601          * file to remove symbols before gzipping it.
 602          */
 603         chunk = (size_t)ehdr->e_shnum * (size_t)ehdr->e_shentsize;
 604         if (chunk == 0 || ehdr->e_shoff == 0)
 605                 goto nosyms;
 606         shdr = alloc_pread(ef->fd, ehdr->e_shoff, chunk);
 607         if (shdr == NULL) {
 608                 printf("\nelf" __XSTRING(__ELF_WORD_SIZE)
 609                     "_loadimage: failed to read section headers");
 610                 goto nosyms;
 611         }
 612
 613         for (i = 0; i < ehdr->e_shnum; i++)
 614                 elf_section_header_convert(ehdr, &shdr[i]);
 615
 616         file_addmetadata(fp, MODINFOMD_SHDR, chunk, shdr);
 617
 618         /*
 619          * Read the section string table and look for the .ctors section.
 620          * We need to tell the kernel where it is so that it can call the
 621          * ctors.
 622          */
 623         chunk = shdr[ehdr->e_shstrndx].sh_size;
 624         if (chunk) {
 625                 shstr = alloc_pread(ef->fd, shdr[ehdr->e_shstrndx].sh_offset,
 626                     chunk);
 627                 if (shstr) {
 628                         for (i = 0; i < ehdr->e_shnum; i++) {
 629                                 if (strcmp(shstr + shdr[i].sh_name,
 630                                     ".ctors") != 0)
 631                                         continue;
 632                                 ctors = shdr[i].sh_addr;
 633                                 file_addmetadata(fp, MODINFOMD_CTORS_ADDR,
 634                                     sizeof(ctors), &ctors);
 635                                 size = shdr[i].sh_size;
 636                                 file_addmetadata(fp, MODINFOMD_CTORS_SIZE,
 637                                     sizeof(size), &size);
 638                                 break;
 639                         }
 640                         free(shstr);
 641                 }
 642         }
 643
 644         /*
 645          * Now load any symbols.
 646          */
 647         symtabindex = -1;
 648         symstrindex = -1;
 649         for (i = 0; i < ehdr->e_shnum; i++) {
 650                 if (shdr[i].sh_type != SHT_SYMTAB)
 651                         continue;
 652                 for (j = 0; j < ehdr->e_phnum; j++) {
 653                         if (phdr[j].p_type != PT_LOAD)
 654                                 continue;
 655                         if (shdr[i].sh_offset >= phdr[j].p_offset &&
 656                             (shdr[i].sh_offset + shdr[i].sh_size <=
 657                             phdr[j].p_offset + phdr[j].p_filesz)) {
 658                                 shdr[i].sh_offset = 0;
 659                                 shdr[i].sh_size = 0;
 660                                 break;
 661                         }
 662                 }
 663                 if (shdr[i].sh_offset == 0 || shdr[i].sh_size == 0)
 664                         continue;       /* alread loaded in a PT_LOAD above */
 665                 /* Save it for loading below */
 666                 symtabindex = i;
 667                 symstrindex = shdr[i].sh_link;
 668         }
 669         if (symtabindex < 0 || symstrindex < 0)
 670                 goto nosyms;
 671
 672         /* Ok, committed to a load. */
 673 #ifndef ELF_VERBOSE
 674         printf("syms=[");
 675 #endif
 676         ssym = lastaddr;
 677         for (i = symtabindex; i >= 0; i = symstrindex) {
 678 #ifdef ELF_VERBOSE
 679                 char    *secname;
 680
 681                 switch(shdr[i].sh_type) {
 682                 case SHT_SYMTAB:                /* Symbol table */
 683                         secname = "symtab";
 684                         break;
 685                 case SHT_STRTAB:                /* String table */
 686                         secname = "strtab";
 687                         break;
 688                 default:
 689                         secname = "WHOA!!";
 690                         break;
 691                 }
 692 #endif
 693                 size = shdr[i].sh_size;
 694 #if defined(__powerpc__)
 695   #if __ELF_WORD_SIZE == 64
 696                 size = htobe64(size);
 697   #else
 698                 size = htobe32(size);
 699   #endif
 700 #endif
 701
 702                 archsw.arch_copyin(&size, lastaddr, sizeof(size));
 703                 lastaddr += sizeof(size);
 704
 705 #ifdef ELF_VERBOSE
 706                 printf("\n%s: 0x%jx@0x%jx -> 0x%jx-0x%jx", secname,
 707                     (uintmax_t)shdr[i].sh_size, (uintmax_t)shdr[i].sh_offset,
 708                     (uintmax_t)lastaddr,
 709                     (uintmax_t)(lastaddr + shdr[i].sh_size));
 710 #else
 711                 if (i == symstrindex)
 712                         printf("+");
 713                 printf("0x%lx+0x%lx", (long)sizeof(size), (long)size);
 714 #endif
 715
 716                 if (lseek(ef->fd, (off_t)shdr[i].sh_offset, SEEK_SET) == -1) {
 717                         printf("\nelf" __XSTRING(__ELF_WORD_SIZE)
 718                            "_loadimage: could not seek for symbols - skipped!");
 719                         lastaddr = ssym;
 720                         ssym = 0;
 721                         goto nosyms;
 722                 }
 723                 result = archsw.arch_readin(ef->fd, lastaddr, shdr[i].sh_size);
 724                 if (result < 0 || (size_t)result != shdr[i].sh_size) {
 725                         printf("\nelf" __XSTRING(__ELF_WORD_SIZE)
 726                             "_loadimage: could not read symbols - skipped! "
 727                             "(%ju != %ju)", (uintmax_t)result,
 728                             (uintmax_t)shdr[i].sh_size);
 729                         lastaddr = ssym;
 730                         ssym = 0;
 731                         goto nosyms;
 732                 }
 733                 /* Reset offsets relative to ssym */
 734                 lastaddr += shdr[i].sh_size;
 735                 lastaddr = roundup(lastaddr, sizeof(size));
 736                 if (i == symtabindex)
 737                         symtabindex = -1;
 738                 else if (i == symstrindex)
 739                         symstrindex = -1;
 740         }
 741         esym = lastaddr;
 742 #ifndef ELF_VERBOSE
 743         printf("]");
 744 #endif
 745
 746 #if defined(__powerpc__)
 747   /* On PowerPC we always need to provide BE data to the kernel */
 748   #if __ELF_WORD_SIZE == 64
 749         ssym = htobe64((uint64_t)ssym);
 750         esym = htobe64((uint64_t)esym);
 751   #else
 752         ssym = htobe32((uint32_t)ssym);
 753         esym = htobe32((uint32_t)esym);
 754   #endif
 755 #endif
 756
 757         file_addmetadata(fp, MODINFOMD_SSYM, sizeof(ssym), &ssym);
 758         file_addmetadata(fp, MODINFOMD_ESYM, sizeof(esym), &esym);
 759
 760 nosyms:
 761         printf("\n");
 762
 763         ret = lastaddr - firstaddr;
 764         fp->f_addr = firstaddr;
 765
 766         php = NULL;
 767         for (i = 0; i < ehdr->e_phnum; i++) {
 768                 if (phdr[i].p_type == PT_DYNAMIC) {
 769                         php = phdr + i;
 770                         adp = php->p_vaddr;
 771                         file_addmetadata(fp, MODINFOMD_DYNAMIC, sizeof(adp),
 772                             &adp);
 773                         break;
 774                 }
 775         }
 776
 777         if (php == NULL) /* this is bad, we cannot get to symbols or _DYNAMIC */
 778                 goto out;
 779
 780         ndp = php->p_filesz / sizeof(Elf_Dyn);
 781         if (ndp == 0)
 782                 goto out;
 783         dp = malloc(php->p_filesz);
 784         if (dp == NULL)
 785                 goto out;
 786         archsw.arch_copyout(php->p_vaddr + off, dp, php->p_filesz);
 787
 788         ef->strsz = 0;
 789         for (i = 0; i < ndp; i++) {
 790                 if (dp[i].d_tag == 0)
 791                         break;
 792                 switch (dp[i].d_tag) {
 793                 case DT_HASH:
 794                         ef->hashtab =
 795                             (Elf_Hashelt*)(uintptr_t)(dp[i].d_un.d_ptr + off);
 796                         break;
 797                 case DT_STRTAB:
 798                         ef->strtab =
 799                             (char *)(uintptr_t)(dp[i].d_un.d_ptr + off);
 800                         break;
 801                 case DT_STRSZ:
 802                         ef->strsz = dp[i].d_un.d_val;
 803                         break;
 804                 case DT_SYMTAB:
 805                         ef->symtab =
 806                             (Elf_Sym *)(uintptr_t)(dp[i].d_un.d_ptr + off);
 807                         break;
 808                 case DT_REL:
 809                         ef->rel =
 810                             (Elf_Rel *)(uintptr_t)(dp[i].d_un.d_ptr + off);
 811                         break;
 812                 case DT_RELSZ:
 813                         ef->relsz = dp[i].d_un.d_val;
 814                         break;
 815                 case DT_RELA:
 816                         ef->rela =
 817                             (Elf_Rela *)(uintptr_t)(dp[i].d_un.d_ptr + off);
 818                         break;
 819                 case DT_RELASZ:
 820                         ef->relasz = dp[i].d_un.d_val;
 821                         break;
 822                 default:
 823                         break;
 824                 }
 825         }
 826         if (ef->hashtab == NULL || ef->symtab == NULL ||
 827             ef->strtab == NULL || ef->strsz == 0)
 828                 goto out;
 829         COPYOUT(ef->hashtab, &ef->nbuckets, sizeof(ef->nbuckets));
 830         COPYOUT(ef->hashtab + 1, &ef->nchains, sizeof(ef->nchains));
 831         ef->buckets = ef->hashtab + 2;
 832         ef->chains = ef->buckets + ef->nbuckets;
 833
 834         if (__elfN(lookup_symbol)(fp, ef, "__start_set_modmetadata_set",
 835             &sym) != 0)
 836                 return 0;
 837         p_start = sym.st_value + ef->off;
 838         if (__elfN(lookup_symbol)(fp, ef, "__stop_set_modmetadata_set",
 839             &sym) != 0)
 840                 return ENOENT;
 841         p_end = sym.st_value + ef->off;
 842
 843         if (__elfN(parse_modmetadata)(fp, ef, p_start, p_end) == 0)
 844                 goto out;
 845
 846         if (ef->kernel)         /* kernel must not depend on anything */
 847                 goto out;
 848
 849 out:
 850         if (dp)
 851                 free(dp);
 852         if (shdr)
 853                 free(shdr);
 854         return ret;
 855 }
 856
 857 static char invalid_name[] = "bad";
 858
 859 char *
 860 fake_modname(const char *name)
 861 {
 862         const char *sp, *ep;
 863         char *fp;
 864         size_t len;
 865
 866         sp = strrchr(name, '/');
 867         if (sp)
 868                 sp++;
 869         else
 870                 sp = name;
 871
 872         ep = strrchr(sp, '.');
 873         if (ep == NULL) {
 874                 ep = sp + strlen(sp);
 875         }
 876         if (ep == sp) {
 877                 sp = invalid_name;
 878                 ep = invalid_name + sizeof(invalid_name) - 1;
 879         }
 880
 881         len = ep - sp;
 882         fp = malloc(len + 1);
 883         if (fp == NULL)
 884                 return NULL;
 885         memcpy(fp, sp, len);
 886         fp[len] = '\0';
 887         return fp;
 888 }
 889
 890 #if (defined(__i386__) || defined(__powerpc__)) && __ELF_WORD_SIZE == 64
 891 struct mod_metadata64 {
 892         int             md_version;     /* structure version MDTV_* */
 893         int             md_type;        /* type of entry MDT_* */
 894         uint64_t        md_data;        /* specific data */
 895         uint64_t        md_cval;        /* common string label */
 896 };
 897 #endif
 898 #if defined(__amd64__) && __ELF_WORD_SIZE == 32
 899 struct mod_metadata32 {
 900         int             md_version;     /* structure version MDTV_* */
 901         int             md_type;        /* type of entry MDT_* */
 902         uint32_t        md_data;        /* specific data */
 903         uint32_t        md_cval;        /* common string label */
 904 };
 905 #endif
 906
 907 int
 908 __elfN(load_modmetadata)(struct preloaded_file *fp, uint64_t dest)
 909 {
 910         struct elf_file          ef;
 911         int                      err, i, j;
 912         Elf_Shdr                *sh_meta, *shdr = NULL;
 913         Elf_Shdr                *sh_data[2];
 914         char                    *shstrtab = NULL;
 915         size_t                   size;
 916         Elf_Addr                 p_start, p_end;
 917
 918         bzero(&ef, sizeof(struct elf_file));
 919         ef.fd = -1;
 920
 921         err = __elfN(load_elf_header)(fp->f_name, &ef);
 922         if (err != 0)
 923                 goto out;
 924
 925         if (ef.kernel == 1 || ef.ehdr->e_type == ET_EXEC) {
 926                 ef.kernel = 1;
 927         } else if (ef.ehdr->e_type != ET_DYN) {
 928                 err = EFTYPE;
 929                 goto out;
 930         }
 931
 932         size = (size_t)ef.ehdr->e_shnum * (size_t)ef.ehdr->e_shentsize;
 933         shdr = alloc_pread(ef.fd, ef.ehdr->e_shoff, size);
 934         if (shdr == NULL) {
 935                 err = ENOMEM;
 936                 goto out;
 937         }
 938
 939         /* Load shstrtab. */
 940         shstrtab = alloc_pread(ef.fd, shdr[ef.ehdr->e_shstrndx].sh_offset,
 941             shdr[ef.ehdr->e_shstrndx].sh_size);
 942         if (shstrtab == NULL) {
 943                 printf("\nelf" __XSTRING(__ELF_WORD_SIZE)
 944                     "load_modmetadata: unable to load shstrtab\n");
 945                 err = EFTYPE;
 946                 goto out;
 947         }
 948
 949         /* Find set_modmetadata_set and data sections. */
 950         sh_data[0] = sh_data[1] = sh_meta = NULL;
 951         for (i = 0, j = 0; i < ef.ehdr->e_shnum; i++) {
 952                 if (strcmp(&shstrtab[shdr[i].sh_name],
 953                     "set_modmetadata_set") == 0) {
 954                         sh_meta = &shdr[i];
 955                 }
 956                 if ((strcmp(&shstrtab[shdr[i].sh_name], ".data") == 0) ||
 957                     (strcmp(&shstrtab[shdr[i].sh_name], ".rodata") == 0)) {
 958                         sh_data[j++] = &shdr[i];
 959                 }
 960         }
 961         if (sh_meta == NULL || sh_data[0] == NULL || sh_data[1] == NULL) {
 962                 printf("\nelf" __XSTRING(__ELF_WORD_SIZE)
 963     "load_modmetadata: unable to find set_modmetadata_set or data sections\n");
 964                 err = EFTYPE;
 965                 goto out;
 966         }
 967
 968         /* Load set_modmetadata_set into memory */
 969         err = kern_pread(ef.fd, dest, sh_meta->sh_size, sh_meta->sh_offset);
 970         if (err != 0) {
 971                 printf("\nelf" __XSTRING(__ELF_WORD_SIZE)
 972     "load_modmetadata: unable to load set_modmetadata_set: %d\n", err);
 973                 goto out;
 974         }
 975         p_start = dest;
 976         p_end = dest + sh_meta->sh_size;
 977         dest += sh_meta->sh_size;
 978
 979         /* Load data sections into memory. */
 980         err = kern_pread(ef.fd, dest, sh_data[0]->sh_size,
 981             sh_data[0]->sh_offset);
 982         if (err != 0) {
 983                 printf("\nelf" __XSTRING(__ELF_WORD_SIZE)
 984                     "load_modmetadata: unable to load data: %d\n", err);
 985                 goto out;
 986         }
 987
 988         /*
 989          * We have to increment the dest, so that the offset is the same into
 990          * both the .rodata and .data sections.
 991          */
 992         ef.off = -(sh_data[0]->sh_addr - dest);
 993         dest += (sh_data[1]->sh_addr - sh_data[0]->sh_addr);
 994
 995         err = kern_pread(ef.fd, dest, sh_data[1]->sh_size,
 996             sh_data[1]->sh_offset);
 997         if (err != 0) {
 998                 printf("\nelf" __XSTRING(__ELF_WORD_SIZE)
 999                     "load_modmetadata: unable to load data: %d\n", err);
1000                 goto out;
1001         }
1002
1003         err = __elfN(parse_modmetadata)(fp, &ef, p_start, p_end);
1004         if (err != 0) {
1005                 printf("\nelf" __XSTRING(__ELF_WORD_SIZE)
1006                     "load_modmetadata: unable to parse metadata: %d\n", err);
1007                 goto out;
1008         }
1009
1010 out:
1011         if (shstrtab != NULL)
1012                 free(shstrtab);
1013         if (shdr != NULL)
1014                 free(shdr);
1015         if (ef.firstpage != NULL)
1016                 free(ef.firstpage);
1017         if (ef.fd != -1)
1018                 close(ef.fd);
1019         return (err);
1020 }
1021
1022 int
1023 __elfN(parse_modmetadata)(struct preloaded_file *fp, elf_file_t ef,
1024     Elf_Addr p_start, Elf_Addr p_end)
1025 {
1026         struct mod_metadata md;
1027 #if (defined(__i386__) || defined(__powerpc__)) && __ELF_WORD_SIZE == 64
1028         struct mod_metadata64 md64;
1029 #elif defined(__amd64__) && __ELF_WORD_SIZE == 32
1030         struct mod_metadata32 md32;
1031 #endif
1032         struct mod_depend *mdepend;
1033         struct mod_version mver;
1034         char *s;
1035         int error, modcnt, minfolen;
1036         Elf_Addr v, p;
1037
1038         modcnt = 0;
1039         p = p_start;
1040         while (p < p_end) {
1041                 COPYOUT(p, &v, sizeof(v));
1042                 error = __elfN(reloc_ptr)(fp, ef, p, &v, sizeof(v));
1043                 if (error == EOPNOTSUPP)
1044                         v += ef->off;
1045                 else if (error != 0)
1046                         return (error);
1047 #if (defined(__i386__) || defined(__powerpc__)) && __ELF_WORD_SIZE == 64
1048                 COPYOUT(v, &md64, sizeof(md64));
1049                 error = __elfN(reloc_ptr)(fp, ef, v, &md64, sizeof(md64));
1050                 if (error == EOPNOTSUPP) {
1051                         md64.md_cval += ef->off;
1052                         md64.md_data += ef->off;
1053                 } else if (error != 0)
1054                         return (error);
1055                 md.md_version = md64.md_version;
1056                 md.md_type = md64.md_type;
1057                 md.md_cval = (const char *)(uintptr_t)md64.md_cval;
1058                 md.md_data = (void *)(uintptr_t)md64.md_data;
1059 #elif defined(__amd64__) && __ELF_WORD_SIZE == 32
1060                 COPYOUT(v, &md32, sizeof(md32));
1061                 error = __elfN(reloc_ptr)(fp, ef, v, &md32, sizeof(md32));
1062                 if (error == EOPNOTSUPP) {
1063                         md32.md_cval += ef->off;
1064                         md32.md_data += ef->off;
1065                 } else if (error != 0)
1066                         return (error);
1067                 md.md_version = md32.md_version;
1068                 md.md_type = md32.md_type;
1069                 md.md_cval = (const char *)(uintptr_t)md32.md_cval;
1070                 md.md_data = (void *)(uintptr_t)md32.md_data;
1071 #else
1072                 COPYOUT(v, &md, sizeof(md));
1073                 error = __elfN(reloc_ptr)(fp, ef, v, &md, sizeof(md));
1074                 if (error == EOPNOTSUPP) {
1075                         md.md_cval += ef->off;
1076                         md.md_data = (void *)((uintptr_t)md.md_data +
1077                             (uintptr_t)ef->off);
1078                 } else if (error != 0)
1079                         return (error);
1080 #endif
1081                 p += sizeof(Elf_Addr);
1082                 switch(md.md_type) {
1083                 case MDT_DEPEND:
1084                         if (ef->kernel) /* kernel must not depend on anything */
1085                                 break;
1086                         s = strdupout((vm_offset_t)md.md_cval);
1087                         minfolen = sizeof(*mdepend) + strlen(s) + 1;
1088                         mdepend = malloc(minfolen);
1089                         if (mdepend == NULL)
1090                                 return ENOMEM;
1091                         COPYOUT((vm_offset_t)md.md_data, mdepend,
1092                             sizeof(*mdepend));
1093                         strcpy((char*)(mdepend + 1), s);
1094                         free(s);
1095                         file_addmetadata(fp, MODINFOMD_DEPLIST, minfolen,
1096                             mdepend);
1097                         free(mdepend);
1098                         break;
1099                 case MDT_VERSION:
1100                         s = strdupout((vm_offset_t)md.md_cval);
1101                         COPYOUT((vm_offset_t)md.md_data, &mver, sizeof(mver));
1102                         file_addmodule(fp, s, mver.mv_version, NULL);
1103                         free(s);
1104                         modcnt++;
1105                         break;
1106                 }
1107         }
1108         if (modcnt == 0) {
1109                 s = fake_modname(fp->f_name);
1110                 file_addmodule(fp, s, 1, NULL);
1111                 free(s);
1112         }
1113         return 0;
1114 }
1115
1116 static unsigned long
1117 elf_hash(const char *name)
1118 {
1119         const unsigned char *p = (const unsigned char *) name;
1120         unsigned long h = 0;
1121         unsigned long g;
1122
1123         while (*p != '\0') {
1124                 h = (h << 4) + *p++;
1125                 if ((g = h & 0xf0000000) != 0)
1126                         h ^= g >> 24;
1127                 h &= ~g;
1128         }
1129         return h;
1130 }
1131
1132 static const char __elfN(bad_symtable)[] = "elf" __XSTRING(__ELF_WORD_SIZE)
1133     "_lookup_symbol: corrupt symbol table\n";
1134 int
1135 __elfN(lookup_symbol)(struct preloaded_file *fp, elf_file_t ef,
1136     const char* name, Elf_Sym *symp)
1137 {
1138         Elf_Hashelt symnum;
1139         Elf_Sym sym;
1140         char *strp;
1141         unsigned long hash;
1142
1143         hash = elf_hash(name);
1144         COPYOUT(&ef->buckets[hash % ef->nbuckets], &symnum, sizeof(symnum));
1145
1146         while (symnum != STN_UNDEF) {
1147                 if (symnum >= ef->nchains) {
1148                         printf(__elfN(bad_symtable));
1149                         return ENOENT;
1150                 }
1151
1152                 COPYOUT(ef->symtab + symnum, &sym, sizeof(sym));
1153                 if (sym.st_name == 0) {
1154                         printf(__elfN(bad_symtable));
1155                         return ENOENT;
1156                 }
1157
1158                 strp = strdupout((vm_offset_t)(ef->strtab + sym.st_name));
1159                 if (strcmp(name, strp) == 0) {
1160                         free(strp);
1161                         if (sym.st_shndx != SHN_UNDEF ||
1162                             (sym.st_value != 0 &&
1163                             ELF_ST_TYPE(sym.st_info) == STT_FUNC)) {
1164                                 *symp = sym;
1165                                 return 0;
1166                         }
1167                         return ENOENT;
1168                 }
1169                 free(strp);
1170                 COPYOUT(&ef->chains[symnum], &symnum, sizeof(symnum));
1171         }
1172         return ENOENT;
1173 }
1174
1175 /*
1176  * Apply any intra-module relocations to the value. p is the load address
1177  * of the value and val/len is the value to be modified. This does NOT modify
1178  * the image in-place, because this is done by kern_linker later on.
1179  *
1180  * Returns EOPNOTSUPP if no relocation method is supplied.
1181  */
1182 static int
1183 __elfN(reloc_ptr)(struct preloaded_file *mp, elf_file_t ef,
1184     Elf_Addr p, void *val, size_t len)
1185 {
1186         size_t n;
1187         Elf_Rela a;
1188         Elf_Rel r;
1189         int error;
1190
1191         /*
1192          * The kernel is already relocated, but we still want to apply
1193          * offset adjustments.
1194          */
1195         if (ef->kernel)
1196                 return (EOPNOTSUPP);
1197
1198         for (n = 0; n < ef->relsz / sizeof(r); n++) {
1199                 COPYOUT(ef->rel + n, &r, sizeof(r));
1200
1201                 error = __elfN(reloc)(ef, __elfN(symaddr), &r, ELF_RELOC_REL,
1202                     ef->off, p, val, len);
1203                 if (error != 0)
1204                         return (error);
1205         }
1206         for (n = 0; n < ef->relasz / sizeof(a); n++) {
1207                 COPYOUT(ef->rela + n, &a, sizeof(a));
1208
1209                 error = __elfN(reloc)(ef, __elfN(symaddr), &a, ELF_RELOC_RELA,
1210                     ef->off, p, val, len);
1211                 if (error != 0)
1212                         return (error);
1213         }
1214
1215         return (0);
1216 }
1217
1218 static Elf_Addr
1219 __elfN(symaddr)(struct elf_file *ef, Elf_Size symidx)
1220 {
1221
1222         /* Symbol lookup by index not required here. */
1223         return (0);
1224 }