2 * Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
3 * Copyright (c) 1998 Peter Wemm <peter@freebsd.org>
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
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.
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
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
31 #include <sys/param.h>
33 #include <sys/linker.h>
34 #include <sys/module.h>
35 #include <sys/stdint.h>
37 #include <machine/elf.h>
42 #include "bootstrap.h"
44 #define COPYOUT(s,d,l) archsw.arch_copyout((vm_offset_t)(s), d, l)
46 #if defined(__i386__) && __ELF_WORD_SIZE == 64
49 #define ELF_TARG_CLASS ELFCLASS64
50 #define ELF_TARG_MACH EM_X86_64
53 typedef struct elf_file {
75 static int __elfN(loadimage)(struct preloaded_file *mp, elf_file_t ef, u_int64_t loadaddr);
76 static int __elfN(lookup_symbol)(struct preloaded_file *mp, elf_file_t ef, const char* name, Elf_Sym* sym);
77 static int __elfN(reloc_ptr)(struct preloaded_file *mp, elf_file_t ef,
78 Elf_Addr p, void *val, size_t len);
79 static int __elfN(parse_modmetadata)(struct preloaded_file *mp, elf_file_t ef,
80 Elf_Addr p_start, Elf_Addr p_end);
81 static symaddr_fn __elfN(symaddr);
82 static char *fake_modname(const char *name);
84 const char *__elfN(kerneltype) = "elf kernel";
85 const char *__elfN(moduletype) = "elf module";
87 u_int64_t __elfN(relocation_offset) = 0;
90 __elfN(load_elf_header)(char *filename, elf_file_t ef)
97 * Open the image, read and validate the ELF header
99 if (filename == NULL) /* can't handle nameless */
101 if ((ef->fd = open(filename, O_RDONLY)) == -1)
103 ef->firstpage = malloc(PAGE_SIZE);
104 if (ef->firstpage == NULL) {
108 bytes_read = read(ef->fd, ef->firstpage, PAGE_SIZE);
109 ef->firstlen = (size_t)bytes_read;
110 if (bytes_read < 0 || ef->firstlen <= sizeof(Elf_Ehdr)) {
111 err = EFTYPE; /* could be EIO, but may be small file */
114 ehdr = ef->ehdr = (Elf_Ehdr *)ef->firstpage;
117 if (!IS_ELF(*ehdr)) {
121 if (ehdr->e_ident[EI_CLASS] != ELF_TARG_CLASS || /* Layout ? */
122 ehdr->e_ident[EI_DATA] != ELF_TARG_DATA ||
123 ehdr->e_ident[EI_VERSION] != EV_CURRENT || /* Version ? */
124 ehdr->e_version != EV_CURRENT ||
125 ehdr->e_machine != ELF_TARG_MACH) { /* Machine ? */
133 if (ef->firstpage != NULL) {
135 ef->firstpage = NULL;
145 * Attempt to load the file (file) as an ELF module. It will be stored at
146 * (dest), and a pointer to a module structure describing the loaded object
147 * will be saved in (result).
150 __elfN(loadfile)(char *filename, u_int64_t dest, struct preloaded_file **result)
152 return (__elfN(loadfile_raw)(filename, dest, result, 0));
156 __elfN(loadfile_raw)(char *filename, u_int64_t dest,
157 struct preloaded_file **result, int multiboot)
159 struct preloaded_file *fp, *kfp;
165 bzero(&ef, sizeof(struct elf_file));
168 err = __elfN(load_elf_header)(filename, &ef);
175 * Check to see what sort of module we are.
177 kfp = file_findfile(NULL, __elfN(kerneltype));
180 * Kernels can be ET_DYN, so just assume the first loaded object is the
181 * kernel. This assumption will be checked later.
186 if (ef.kernel || ehdr->e_type == ET_EXEC) {
187 /* Looks like a kernel */
189 printf("elf" __XSTRING(__ELF_WORD_SIZE) "_loadfile: kernel already loaded\n");
194 * Calculate destination address based on kernel entrypoint
196 if (ehdr->e_type == ET_EXEC)
197 dest = (ehdr->e_entry & ~PAGE_MASK);
198 if ((ehdr->e_entry & ~PAGE_MASK) == 0) {
199 printf("elf" __XSTRING(__ELF_WORD_SIZE) "_loadfile: not a kernel (maybe static binary?)\n");
205 } else if (ehdr->e_type == ET_DYN) {
206 /* Looks like a kld module */
207 if (multiboot != 0) {
208 printf("elf" __XSTRING(__ELF_WORD_SIZE) "_loadfile: can't load module as multiboot\n");
213 printf("elf" __XSTRING(__ELF_WORD_SIZE) "_loadfile: can't load module before kernel\n");
217 if (strcmp(__elfN(kerneltype), kfp->f_type)) {
218 printf("elf" __XSTRING(__ELF_WORD_SIZE) "_loadfile: can't load module with kernel type '%s'\n", kfp->f_type);
222 /* Looks OK, got ahead */
230 if (archsw.arch_loadaddr != NULL)
231 dest = archsw.arch_loadaddr(LOAD_ELF, ehdr, dest);
233 dest = roundup(dest, PAGE_SIZE);
236 * Ok, we think we should handle this.
240 printf("elf" __XSTRING(__ELF_WORD_SIZE) "_loadfile: cannot allocate module info\n");
244 if (ef.kernel == 1 && multiboot == 0)
245 setenv("kernelname", filename, 1);
246 fp->f_name = strdup(filename);
248 fp->f_type = strdup(ef.kernel ?
249 __elfN(kerneltype) : __elfN(moduletype));
251 fp->f_type = strdup("elf multiboot kernel");
255 printf("%s entry at 0x%jx\n", filename, (uintmax_t)ehdr->e_entry);
257 printf("%s ", filename);
260 fp->f_size = __elfN(loadimage)(fp, &ef, dest);
261 if (fp->f_size == 0 || fp->f_addr == 0)
264 /* save exec header as metadata */
265 file_addmetadata(fp, MODINFOMD_ELFHDR, sizeof(*ehdr), ehdr);
267 /* Load OK, return module pointer */
268 *result = (struct preloaded_file *)fp;
285 * With the file (fd) open on the image, and (ehdr) containing
286 * the Elf header, load the image at (off)
289 __elfN(loadimage)(struct preloaded_file *fp, elf_file_t ef, u_int64_t off)
294 Elf_Phdr *phdr, *php;
298 vm_offset_t firstaddr;
299 vm_offset_t lastaddr;
312 Elf_Addr p_start, p_end;
317 firstaddr = lastaddr = 0;
319 if (ehdr->e_type == ET_EXEC) {
320 #if defined(__i386__) || defined(__amd64__)
321 #if __ELF_WORD_SIZE == 64
322 off = - (off & 0xffffffffff000000ull);/* x86_64 relocates after locore */
324 off = - (off & 0xff000000u); /* i386 relocates after locore */
326 #elif defined(__powerpc__)
328 * On the purely virtual memory machines like e500, the kernel is
329 * linked against its final VA range, which is most often not
330 * available at the loader stage, but only after kernel initializes
331 * and completes its VM settings. In such cases we cannot use p_vaddr
332 * field directly to load ELF segments, but put them at some
333 * 'load-time' locations.
335 if (off & 0xf0000000u) {
336 off = -(off & 0xf0000000u);
338 * XXX the physical load address should not be hardcoded. Note
339 * that the Book-E kernel assumes that it's loaded at a 16MB
340 * boundary for now...
343 ehdr->e_entry += off;
345 printf("Converted entry 0x%08x\n", ehdr->e_entry);
349 #elif defined(__arm__)
351 * The elf headers in some kernels specify virtual addresses in all
352 * header fields. More recently, the e_entry and p_paddr fields are the
353 * proper physical addresses. Even when the p_paddr fields are correct,
354 * the MI code below uses the p_vaddr fields with an offset added for
355 * loading (doing so is arguably wrong). To make loading work, we need
356 * an offset that represents the difference between physical and virtual
357 * addressing. ARM kernels are always linked at 0xCnnnnnnn. Depending
358 * on the headers, the offset value passed in may be physical or virtual
359 * (because it typically comes from e_entry), but we always replace
360 * whatever is passed in with the va<->pa offset. On the other hand, we
361 * always remove the high-order part of the entry address whether it's
362 * physical or virtual, because it will be adjusted later for the actual
363 * physical entry point based on where the image gets loaded.
366 ehdr->e_entry &= ~0xf0000000;
368 printf("ehdr->e_entry 0x%08x, va<->pa off %llx\n", ehdr->e_entry, off);
371 off = 0; /* other archs use direct mapped kernels */
377 __elfN(relocation_offset) = off;
379 if ((ehdr->e_phoff + ehdr->e_phnum * sizeof(*phdr)) > ef->firstlen) {
380 printf("elf" __XSTRING(__ELF_WORD_SIZE) "_loadimage: program header not within first page\n");
383 phdr = (Elf_Phdr *)(ef->firstpage + ehdr->e_phoff);
385 for (i = 0; i < ehdr->e_phnum; i++) {
386 /* We want to load PT_LOAD segments only.. */
387 if (phdr[i].p_type != PT_LOAD)
391 printf("Segment: 0x%lx@0x%lx -> 0x%lx-0x%lx",
392 (long)phdr[i].p_filesz, (long)phdr[i].p_offset,
393 (long)(phdr[i].p_vaddr + off),
394 (long)(phdr[i].p_vaddr + off + phdr[i].p_memsz - 1));
396 if ((phdr[i].p_flags & PF_W) == 0) {
397 printf("text=0x%lx ", (long)phdr[i].p_filesz);
399 printf("data=0x%lx", (long)phdr[i].p_filesz);
400 if (phdr[i].p_filesz < phdr[i].p_memsz)
401 printf("+0x%lx", (long)(phdr[i].p_memsz -phdr[i].p_filesz));
406 if (ef->firstlen > phdr[i].p_offset) {
407 fpcopy = ef->firstlen - phdr[i].p_offset;
408 archsw.arch_copyin(ef->firstpage + phdr[i].p_offset,
409 phdr[i].p_vaddr + off, fpcopy);
411 if (phdr[i].p_filesz > fpcopy) {
412 if (kern_pread(ef->fd, phdr[i].p_vaddr + off + fpcopy,
413 phdr[i].p_filesz - fpcopy, phdr[i].p_offset + fpcopy) != 0) {
414 printf("\nelf" __XSTRING(__ELF_WORD_SIZE)
415 "_loadimage: read failed\n");
419 /* clear space from oversized segments; eg: bss */
420 if (phdr[i].p_filesz < phdr[i].p_memsz) {
422 printf(" (bss: 0x%lx-0x%lx)",
423 (long)(phdr[i].p_vaddr + off + phdr[i].p_filesz),
424 (long)(phdr[i].p_vaddr + off + phdr[i].p_memsz - 1));
427 kern_bzero(phdr[i].p_vaddr + off + phdr[i].p_filesz,
428 phdr[i].p_memsz - phdr[i].p_filesz);
434 if (archsw.arch_loadseg != NULL)
435 archsw.arch_loadseg(ehdr, phdr + i, off);
437 if (firstaddr == 0 || firstaddr > (phdr[i].p_vaddr + off))
438 firstaddr = phdr[i].p_vaddr + off;
439 if (lastaddr == 0 || lastaddr < (phdr[i].p_vaddr + off + phdr[i].p_memsz))
440 lastaddr = phdr[i].p_vaddr + off + phdr[i].p_memsz;
442 lastaddr = roundup(lastaddr, sizeof(long));
445 * Get the section headers. We need this for finding the .ctors
446 * section as well as for loading any symbols. Both may be hard
447 * to do if reading from a .gz file as it involves seeking. I
448 * think the rule is going to have to be that you must strip a
449 * file to remove symbols before gzipping it.
451 chunk = ehdr->e_shnum * ehdr->e_shentsize;
452 if (chunk == 0 || ehdr->e_shoff == 0)
454 shdr = alloc_pread(ef->fd, ehdr->e_shoff, chunk);
456 printf("\nelf" __XSTRING(__ELF_WORD_SIZE)
457 "_loadimage: failed to read section headers");
460 file_addmetadata(fp, MODINFOMD_SHDR, chunk, shdr);
463 * Read the section string table and look for the .ctors section.
464 * We need to tell the kernel where it is so that it can call the
467 chunk = shdr[ehdr->e_shstrndx].sh_size;
469 shstr = alloc_pread(ef->fd, shdr[ehdr->e_shstrndx].sh_offset, chunk);
471 for (i = 0; i < ehdr->e_shnum; i++) {
472 if (strcmp(shstr + shdr[i].sh_name, ".ctors") != 0)
474 ctors = shdr[i].sh_addr;
475 file_addmetadata(fp, MODINFOMD_CTORS_ADDR, sizeof(ctors),
477 size = shdr[i].sh_size;
478 file_addmetadata(fp, MODINFOMD_CTORS_SIZE, sizeof(size),
487 * Now load any symbols.
491 for (i = 0; i < ehdr->e_shnum; i++) {
492 if (shdr[i].sh_type != SHT_SYMTAB)
494 for (j = 0; j < ehdr->e_phnum; j++) {
495 if (phdr[j].p_type != PT_LOAD)
497 if (shdr[i].sh_offset >= phdr[j].p_offset &&
498 (shdr[i].sh_offset + shdr[i].sh_size <=
499 phdr[j].p_offset + phdr[j].p_filesz)) {
500 shdr[i].sh_offset = 0;
505 if (shdr[i].sh_offset == 0 || shdr[i].sh_size == 0)
506 continue; /* alread loaded in a PT_LOAD above */
507 /* Save it for loading below */
509 symstrindex = shdr[i].sh_link;
511 if (symtabindex < 0 || symstrindex < 0)
514 /* Ok, committed to a load. */
519 for (i = symtabindex; i >= 0; i = symstrindex) {
523 switch(shdr[i].sh_type) {
524 case SHT_SYMTAB: /* Symbol table */
527 case SHT_STRTAB: /* String table */
536 size = shdr[i].sh_size;
537 archsw.arch_copyin(&size, lastaddr, sizeof(size));
538 lastaddr += sizeof(size);
541 printf("\n%s: 0x%jx@0x%jx -> 0x%jx-0x%jx", secname,
542 (uintmax_t)shdr[i].sh_size, (uintmax_t)shdr[i].sh_offset,
543 (uintmax_t)lastaddr, (uintmax_t)(lastaddr + shdr[i].sh_size));
545 if (i == symstrindex)
547 printf("0x%lx+0x%lx", (long)sizeof(size), (long)size);
550 if (lseek(ef->fd, (off_t)shdr[i].sh_offset, SEEK_SET) == -1) {
551 printf("\nelf" __XSTRING(__ELF_WORD_SIZE) "_loadimage: could not seek for symbols - skipped!");
556 result = archsw.arch_readin(ef->fd, lastaddr, shdr[i].sh_size);
557 if (result < 0 || (size_t)result != shdr[i].sh_size) {
558 printf("\nelf" __XSTRING(__ELF_WORD_SIZE) "_loadimage: could not read symbols - skipped! (%ju != %ju)", (uintmax_t)result,
559 (uintmax_t)shdr[i].sh_size);
564 /* Reset offsets relative to ssym */
565 lastaddr += shdr[i].sh_size;
566 lastaddr = roundup(lastaddr, sizeof(size));
567 if (i == symtabindex)
569 else if (i == symstrindex)
577 file_addmetadata(fp, MODINFOMD_SSYM, sizeof(ssym), &ssym);
578 file_addmetadata(fp, MODINFOMD_ESYM, sizeof(esym), &esym);
583 ret = lastaddr - firstaddr;
584 fp->f_addr = firstaddr;
587 for (i = 0; i < ehdr->e_phnum; i++) {
588 if (phdr[i].p_type == PT_DYNAMIC) {
591 file_addmetadata(fp, MODINFOMD_DYNAMIC, sizeof(adp), &adp);
596 if (php == NULL) /* this is bad, we cannot get to symbols or _DYNAMIC */
599 ndp = php->p_filesz / sizeof(Elf_Dyn);
602 dp = malloc(php->p_filesz);
605 archsw.arch_copyout(php->p_vaddr + off, dp, php->p_filesz);
608 for (i = 0; i < ndp; i++) {
609 if (dp[i].d_tag == 0)
611 switch (dp[i].d_tag) {
613 ef->hashtab = (Elf_Hashelt*)(uintptr_t)(dp[i].d_un.d_ptr + off);
616 ef->strtab = (char *)(uintptr_t)(dp[i].d_un.d_ptr + off);
619 ef->strsz = dp[i].d_un.d_val;
622 ef->symtab = (Elf_Sym*)(uintptr_t)(dp[i].d_un.d_ptr + off);
625 ef->rel = (Elf_Rel *)(uintptr_t)(dp[i].d_un.d_ptr + off);
628 ef->relsz = dp[i].d_un.d_val;
631 ef->rela = (Elf_Rela *)(uintptr_t)(dp[i].d_un.d_ptr + off);
634 ef->relasz = dp[i].d_un.d_val;
640 if (ef->hashtab == NULL || ef->symtab == NULL ||
641 ef->strtab == NULL || ef->strsz == 0)
643 COPYOUT(ef->hashtab, &ef->nbuckets, sizeof(ef->nbuckets));
644 COPYOUT(ef->hashtab + 1, &ef->nchains, sizeof(ef->nchains));
645 ef->buckets = ef->hashtab + 2;
646 ef->chains = ef->buckets + ef->nbuckets;
648 if (__elfN(lookup_symbol)(fp, ef, "__start_set_modmetadata_set", &sym) != 0)
650 p_start = sym.st_value + ef->off;
651 if (__elfN(lookup_symbol)(fp, ef, "__stop_set_modmetadata_set", &sym) != 0)
653 p_end = sym.st_value + ef->off;
655 if (__elfN(parse_modmetadata)(fp, ef, p_start, p_end) == 0)
658 if (ef->kernel) /* kernel must not depend on anything */
669 static char invalid_name[] = "bad";
672 fake_modname(const char *name)
678 sp = strrchr(name, '/');
683 ep = strrchr(name, '.');
687 ep = invalid_name + sizeof(invalid_name) - 1;
690 ep = name + strlen(name);
692 fp = malloc(len + 1);
700 #if (defined(__i386__) || defined(__powerpc__)) && __ELF_WORD_SIZE == 64
701 struct mod_metadata64 {
702 int md_version; /* structure version MDTV_* */
703 int md_type; /* type of entry MDT_* */
704 u_int64_t md_data; /* specific data */
705 u_int64_t md_cval; /* common string label */
708 #if defined(__amd64__) && __ELF_WORD_SIZE == 32
709 struct mod_metadata32 {
710 int md_version; /* structure version MDTV_* */
711 int md_type; /* type of entry MDT_* */
712 u_int32_t md_data; /* specific data */
713 u_int32_t md_cval; /* common string label */
718 __elfN(load_modmetadata)(struct preloaded_file *fp, u_int64_t dest)
722 Elf_Shdr *sh_meta, *shdr = NULL;
723 Elf_Shdr *sh_data[2];
724 char *shstrtab = NULL;
726 Elf_Addr p_start, p_end;
728 bzero(&ef, sizeof(struct elf_file));
731 err = __elfN(load_elf_header)(fp->f_name, &ef);
735 if (ef.kernel == 1 || ef.ehdr->e_type == ET_EXEC) {
737 } else if (ef.ehdr->e_type != ET_DYN) {
742 size = ef.ehdr->e_shnum * ef.ehdr->e_shentsize;
743 shdr = alloc_pread(ef.fd, ef.ehdr->e_shoff, size);
750 shstrtab = alloc_pread(ef.fd, shdr[ef.ehdr->e_shstrndx].sh_offset,
751 shdr[ef.ehdr->e_shstrndx].sh_size);
752 if (shstrtab == NULL) {
753 printf("\nelf" __XSTRING(__ELF_WORD_SIZE)
754 "load_modmetadata: unable to load shstrtab\n");
759 /* Find set_modmetadata_set and data sections. */
760 sh_data[0] = sh_data[1] = sh_meta = NULL;
761 for (i = 0, j = 0; i < ef.ehdr->e_shnum; i++) {
762 if (strcmp(&shstrtab[shdr[i].sh_name],
763 "set_modmetadata_set") == 0) {
766 if ((strcmp(&shstrtab[shdr[i].sh_name], ".data") == 0) ||
767 (strcmp(&shstrtab[shdr[i].sh_name], ".rodata") == 0)) {
768 sh_data[j++] = &shdr[i];
771 if (sh_meta == NULL || sh_data[0] == NULL || sh_data[1] == NULL) {
772 printf("\nelf" __XSTRING(__ELF_WORD_SIZE)
773 "load_modmetadata: unable to find set_modmetadata_set or data sections\n");
778 /* Load set_modmetadata_set into memory */
779 err = kern_pread(ef.fd, dest, sh_meta->sh_size, sh_meta->sh_offset);
781 printf("\nelf" __XSTRING(__ELF_WORD_SIZE)
782 "load_modmetadata: unable to load set_modmetadata_set: %d\n", err);
786 p_end = dest + sh_meta->sh_size;
787 dest += sh_meta->sh_size;
789 /* Load data sections into memory. */
790 err = kern_pread(ef.fd, dest, sh_data[0]->sh_size,
791 sh_data[0]->sh_offset);
793 printf("\nelf" __XSTRING(__ELF_WORD_SIZE)
794 "load_modmetadata: unable to load data: %d\n", err);
799 * We have to increment the dest, so that the offset is the same into
800 * both the .rodata and .data sections.
802 ef.off = -(sh_data[0]->sh_addr - dest);
803 dest += (sh_data[1]->sh_addr - sh_data[0]->sh_addr);
805 err = kern_pread(ef.fd, dest, sh_data[1]->sh_size,
806 sh_data[1]->sh_offset);
808 printf("\nelf" __XSTRING(__ELF_WORD_SIZE)
809 "load_modmetadata: unable to load data: %d\n", err);
813 err = __elfN(parse_modmetadata)(fp, &ef, p_start, p_end);
815 printf("\nelf" __XSTRING(__ELF_WORD_SIZE)
816 "load_modmetadata: unable to parse metadata: %d\n", err);
821 if (shstrtab != NULL)
825 if (ef.firstpage != NULL)
833 __elfN(parse_modmetadata)(struct preloaded_file *fp, elf_file_t ef,
834 Elf_Addr p_start, Elf_Addr p_end)
836 struct mod_metadata md;
837 #if (defined(__i386__) || defined(__powerpc__)) && __ELF_WORD_SIZE == 64
838 struct mod_metadata64 md64;
839 #elif defined(__amd64__) && __ELF_WORD_SIZE == 32
840 struct mod_metadata32 md32;
842 struct mod_depend *mdepend;
843 struct mod_version mver;
845 int error, modcnt, minfolen;
851 COPYOUT(p, &v, sizeof(v));
852 error = __elfN(reloc_ptr)(fp, ef, p, &v, sizeof(v));
853 if (error == EOPNOTSUPP)
857 #if (defined(__i386__) || defined(__powerpc__)) && __ELF_WORD_SIZE == 64
858 COPYOUT(v, &md64, sizeof(md64));
859 error = __elfN(reloc_ptr)(fp, ef, v, &md64, sizeof(md64));
860 if (error == EOPNOTSUPP) {
861 md64.md_cval += ef->off;
862 md64.md_data += ef->off;
863 } else if (error != 0)
865 md.md_version = md64.md_version;
866 md.md_type = md64.md_type;
867 md.md_cval = (const char *)(uintptr_t)md64.md_cval;
868 md.md_data = (void *)(uintptr_t)md64.md_data;
869 #elif defined(__amd64__) && __ELF_WORD_SIZE == 32
870 COPYOUT(v, &md32, sizeof(md32));
871 error = __elfN(reloc_ptr)(fp, ef, v, &md32, sizeof(md32));
872 if (error == EOPNOTSUPP) {
873 md32.md_cval += ef->off;
874 md32.md_data += ef->off;
875 } else if (error != 0)
877 md.md_version = md32.md_version;
878 md.md_type = md32.md_type;
879 md.md_cval = (const char *)(uintptr_t)md32.md_cval;
880 md.md_data = (void *)(uintptr_t)md32.md_data;
882 COPYOUT(v, &md, sizeof(md));
883 error = __elfN(reloc_ptr)(fp, ef, v, &md, sizeof(md));
884 if (error == EOPNOTSUPP) {
885 md.md_cval += ef->off;
886 md.md_data += ef->off;
887 } else if (error != 0)
890 p += sizeof(Elf_Addr);
893 if (ef->kernel) /* kernel must not depend on anything */
895 s = strdupout((vm_offset_t)md.md_cval);
896 minfolen = sizeof(*mdepend) + strlen(s) + 1;
897 mdepend = malloc(minfolen);
900 COPYOUT((vm_offset_t)md.md_data, mdepend, sizeof(*mdepend));
901 strcpy((char*)(mdepend + 1), s);
903 file_addmetadata(fp, MODINFOMD_DEPLIST, minfolen, mdepend);
907 s = strdupout((vm_offset_t)md.md_cval);
908 COPYOUT((vm_offset_t)md.md_data, &mver, sizeof(mver));
909 file_addmodule(fp, s, mver.mv_version, NULL);
916 s = fake_modname(fp->f_name);
917 file_addmodule(fp, s, 1, NULL);
924 elf_hash(const char *name)
926 const unsigned char *p = (const unsigned char *) name;
932 if ((g = h & 0xf0000000) != 0)
939 static const char __elfN(bad_symtable)[] = "elf" __XSTRING(__ELF_WORD_SIZE) "_lookup_symbol: corrupt symbol table\n";
941 __elfN(lookup_symbol)(struct preloaded_file *fp, elf_file_t ef, const char* name,
949 hash = elf_hash(name);
950 COPYOUT(&ef->buckets[hash % ef->nbuckets], &symnum, sizeof(symnum));
952 while (symnum != STN_UNDEF) {
953 if (symnum >= ef->nchains) {
954 printf(__elfN(bad_symtable));
958 COPYOUT(ef->symtab + symnum, &sym, sizeof(sym));
959 if (sym.st_name == 0) {
960 printf(__elfN(bad_symtable));
964 strp = strdupout((vm_offset_t)(ef->strtab + sym.st_name));
965 if (strcmp(name, strp) == 0) {
967 if (sym.st_shndx != SHN_UNDEF ||
968 (sym.st_value != 0 &&
969 ELF_ST_TYPE(sym.st_info) == STT_FUNC)) {
976 COPYOUT(&ef->chains[symnum], &symnum, sizeof(symnum));
982 * Apply any intra-module relocations to the value. p is the load address
983 * of the value and val/len is the value to be modified. This does NOT modify
984 * the image in-place, because this is done by kern_linker later on.
986 * Returns EOPNOTSUPP if no relocation method is supplied.
989 __elfN(reloc_ptr)(struct preloaded_file *mp, elf_file_t ef,
990 Elf_Addr p, void *val, size_t len)
998 * The kernel is already relocated, but we still want to apply
999 * offset adjustments.
1002 return (EOPNOTSUPP);
1004 for (n = 0; n < ef->relsz / sizeof(r); n++) {
1005 COPYOUT(ef->rel + n, &r, sizeof(r));
1007 error = __elfN(reloc)(ef, __elfN(symaddr), &r, ELF_RELOC_REL,
1008 ef->off, p, val, len);
1012 for (n = 0; n < ef->relasz / sizeof(a); n++) {
1013 COPYOUT(ef->rela + n, &a, sizeof(a));
1015 error = __elfN(reloc)(ef, __elfN(symaddr), &a, ELF_RELOC_RELA,
1016 ef->off, p, val, len);
1025 __elfN(symaddr)(struct elf_file *ef, Elf_Size symidx)
1028 /* Symbol lookup by index not required here. */