1134459Siedowse/*- 2134459Siedowse * Copyright (c) 2004 Ian Dowse <iedowse@freebsd.org> 3134459Siedowse * Copyright (c) 1998 Michael Smith <msmith@freebsd.org> 4134459Siedowse * Copyright (c) 1998 Peter Wemm <peter@freebsd.org> 5134459Siedowse * All rights reserved. 6134459Siedowse * 7134459Siedowse * Redistribution and use in source and binary forms, with or without 8134459Siedowse * modification, are permitted provided that the following conditions 9134459Siedowse * are met: 10134459Siedowse * 1. Redistributions of source code must retain the above copyright 11134459Siedowse * notice, this list of conditions and the following disclaimer. 12134459Siedowse * 2. Redistributions in binary form must reproduce the above copyright 13134459Siedowse * notice, this list of conditions and the following disclaimer in the 14134459Siedowse * documentation and/or other materials provided with the distribution. 15134459Siedowse * 16134459Siedowse * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17134459Siedowse * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18134459Siedowse * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19134459Siedowse * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20134459Siedowse * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21134459Siedowse * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22134459Siedowse * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23134459Siedowse * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24134459Siedowse * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25134459Siedowse * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26134459Siedowse * SUCH DAMAGE. 27134459Siedowse */ 28134459Siedowse 29134459Siedowse#include <sys/cdefs.h> 30134459Siedowse__FBSDID("$FreeBSD$"); 31134459Siedowse 32134459Siedowse#include <sys/param.h> 33134459Siedowse#include <sys/exec.h> 34134459Siedowse#include <sys/linker.h> 35134459Siedowse#include <sys/module.h> 36134459Siedowse#include <inttypes.h> 37134459Siedowse#include <string.h> 38134459Siedowse#include <machine/elf.h> 39134459Siedowse#include <stand.h> 40134459Siedowse#define FREEBSD_ELF 41134459Siedowse#include <link.h> 42134459Siedowse 43134459Siedowse#include "bootstrap.h" 44134459Siedowse 45134459Siedowse#define COPYOUT(s,d,l) archsw.arch_copyout((vm_offset_t)(s), d, l) 46134459Siedowse 47134459Siedowse#if defined(__i386__) && __ELF_WORD_SIZE == 64 48134459Siedowse#undef ELF_TARG_CLASS 49134459Siedowse#undef ELF_TARG_MACH 50134459Siedowse#define ELF_TARG_CLASS ELFCLASS64 51134459Siedowse#define ELF_TARG_MACH EM_X86_64 52134459Siedowse#endif 53134459Siedowse 54134459Siedowsetypedef struct elf_file { 55134459Siedowse Elf_Ehdr hdr; 56134459Siedowse Elf_Shdr *e_shdr; 57134459Siedowse 58134459Siedowse int symtabindex; /* Index of symbol table */ 59134459Siedowse int shstrindex; /* Index of section name string table */ 60134459Siedowse 61134459Siedowse int fd; 62134459Siedowse vm_offset_t off; 63134459Siedowse} *elf_file_t; 64134459Siedowse 65134459Siedowsestatic int __elfN(obj_loadimage)(struct preloaded_file *mp, elf_file_t ef, 66134459Siedowse u_int64_t loadaddr); 67134459Siedowsestatic int __elfN(obj_lookup_set)(struct preloaded_file *mp, elf_file_t ef, 68134459Siedowse const char *name, Elf_Addr *startp, Elf_Addr *stopp, int *countp); 69134459Siedowsestatic int __elfN(obj_reloc_ptr)(struct preloaded_file *mp, elf_file_t ef, 70134459Siedowse Elf_Addr p, void *val, size_t len); 71134459Siedowsestatic int __elfN(obj_parse_modmetadata)(struct preloaded_file *mp, 72134459Siedowse elf_file_t ef); 73153504Smarcelstatic Elf_Addr __elfN(obj_symaddr)(struct elf_file *ef, Elf_Size symidx); 74134459Siedowse 75134459Siedowseconst char *__elfN(obj_kerneltype) = "elf kernel"; 76134459Siedowseconst char *__elfN(obj_moduletype) = "elf obj module"; 77134459Siedowse 78134459Siedowse/* 79134459Siedowse * Attempt to load the file (file) as an ELF module. It will be stored at 80134459Siedowse * (dest), and a pointer to a module structure describing the loaded object 81134459Siedowse * will be saved in (result). 82134459Siedowse */ 83134459Siedowseint 84134459Siedowse__elfN(obj_loadfile)(char *filename, u_int64_t dest, 85134459Siedowse struct preloaded_file **result) 86134459Siedowse{ 87134459Siedowse struct preloaded_file *fp, *kfp; 88134459Siedowse struct elf_file ef; 89134459Siedowse Elf_Ehdr *hdr; 90134459Siedowse int err; 91134459Siedowse ssize_t bytes_read; 92134459Siedowse 93134459Siedowse fp = NULL; 94134459Siedowse bzero(&ef, sizeof(struct elf_file)); 95134459Siedowse 96134459Siedowse /* 97134459Siedowse * Open the image, read and validate the ELF header 98134459Siedowse */ 99134459Siedowse if (filename == NULL) /* can't handle nameless */ 100134459Siedowse return(EFTYPE); 101134459Siedowse if ((ef.fd = open(filename, O_RDONLY)) == -1) 102134459Siedowse return(errno); 103134459Siedowse 104134459Siedowse hdr = &ef.hdr; 105134459Siedowse bytes_read = read(ef.fd, hdr, sizeof(*hdr)); 106134459Siedowse if (bytes_read != sizeof(*hdr)) { 107134459Siedowse err = EFTYPE; /* could be EIO, but may be small file */ 108134459Siedowse goto oerr; 109134459Siedowse } 110134459Siedowse 111134459Siedowse /* Is it ELF? */ 112134459Siedowse if (!IS_ELF(*hdr)) { 113134459Siedowse err = EFTYPE; 114134459Siedowse goto oerr; 115134459Siedowse } 116134459Siedowse if (hdr->e_ident[EI_CLASS] != ELF_TARG_CLASS || /* Layout ? */ 117134459Siedowse hdr->e_ident[EI_DATA] != ELF_TARG_DATA || 118134459Siedowse hdr->e_ident[EI_VERSION] != EV_CURRENT || /* Version ? */ 119134459Siedowse hdr->e_version != EV_CURRENT || 120134459Siedowse hdr->e_machine != ELF_TARG_MACH || /* Machine ? */ 121134459Siedowse hdr->e_type != ET_REL) { 122134459Siedowse err = EFTYPE; 123134459Siedowse goto oerr; 124134459Siedowse } 125134459Siedowse 126134459Siedowse if (hdr->e_shnum * hdr->e_shentsize == 0 || hdr->e_shoff == 0 || 127134459Siedowse hdr->e_shentsize != sizeof(Elf_Shdr)) { 128134459Siedowse err = EFTYPE; 129134459Siedowse goto oerr; 130134459Siedowse } 131134459Siedowse 132294417Sroyger kfp = file_findfile(NULL, __elfN(obj_kerneltype)); 133134459Siedowse if (kfp == NULL) { 134134459Siedowse printf("elf" __XSTRING(__ELF_WORD_SIZE) 135134459Siedowse "_obj_loadfile: can't load module before kernel\n"); 136134459Siedowse err = EPERM; 137134459Siedowse goto oerr; 138134459Siedowse } 139134459Siedowse 140220311Smarcel if (archsw.arch_loadaddr != NULL) 141220311Smarcel dest = archsw.arch_loadaddr(LOAD_ELF, hdr, dest); 142220311Smarcel else 143220311Smarcel dest = roundup(dest, PAGE_SIZE); 144134459Siedowse 145134459Siedowse /* 146134459Siedowse * Ok, we think we should handle this. 147134459Siedowse */ 148134459Siedowse fp = file_alloc(); 149134459Siedowse if (fp == NULL) { 150134459Siedowse printf("elf" __XSTRING(__ELF_WORD_SIZE) 151134459Siedowse "_obj_loadfile: cannot allocate module info\n"); 152134459Siedowse err = EPERM; 153134459Siedowse goto out; 154134459Siedowse } 155134459Siedowse fp->f_name = strdup(filename); 156134459Siedowse fp->f_type = strdup(__elfN(obj_moduletype)); 157134459Siedowse 158134459Siedowse printf("%s ", filename); 159134459Siedowse 160134459Siedowse fp->f_size = __elfN(obj_loadimage)(fp, &ef, dest); 161134459Siedowse if (fp->f_size == 0 || fp->f_addr == 0) 162134459Siedowse goto ioerr; 163134459Siedowse 164134459Siedowse /* save exec header as metadata */ 165134459Siedowse file_addmetadata(fp, MODINFOMD_ELFHDR, sizeof(*hdr), hdr); 166134459Siedowse 167134459Siedowse /* Load OK, return module pointer */ 168134459Siedowse *result = (struct preloaded_file *)fp; 169134459Siedowse err = 0; 170134459Siedowse goto out; 171134459Siedowse 172134459Siedowseioerr: 173134459Siedowse err = EIO; 174134459Siedowseoerr: 175134459Siedowse file_discard(fp); 176134459Siedowseout: 177134459Siedowse close(ef.fd); 178134459Siedowse if (ef.e_shdr != NULL) 179134459Siedowse free(ef.e_shdr); 180134459Siedowse 181134459Siedowse return(err); 182134459Siedowse} 183134459Siedowse 184134459Siedowse/* 185134459Siedowse * With the file (fd) open on the image, and (ehdr) containing 186134459Siedowse * the Elf header, load the image at (off) 187134459Siedowse */ 188134459Siedowsestatic int 189134459Siedowse__elfN(obj_loadimage)(struct preloaded_file *fp, elf_file_t ef, u_int64_t off) 190134459Siedowse{ 191134459Siedowse Elf_Ehdr *hdr; 192223295Skan Elf_Shdr *shdr, *cshdr, *lshdr; 193134459Siedowse vm_offset_t firstaddr, lastaddr; 194134459Siedowse int i, nsym, res, ret, shdrbytes, symstrindex; 195134459Siedowse 196134459Siedowse ret = 0; 197134459Siedowse firstaddr = lastaddr = (vm_offset_t)off; 198134459Siedowse hdr = &ef->hdr; 199134459Siedowse ef->off = (vm_offset_t)off; 200134459Siedowse 201134459Siedowse /* Read in the section headers. */ 202134459Siedowse shdrbytes = hdr->e_shnum * hdr->e_shentsize; 203134459Siedowse shdr = alloc_pread(ef->fd, (off_t)hdr->e_shoff, shdrbytes); 204134459Siedowse if (shdr == NULL) { 205134459Siedowse printf("\nelf" __XSTRING(__ELF_WORD_SIZE) 206134459Siedowse "_obj_loadimage: read section headers failed\n"); 207134459Siedowse goto out; 208134459Siedowse } 209134459Siedowse ef->e_shdr = shdr; 210134459Siedowse 211134459Siedowse /* 212134459Siedowse * Decide where to load everything, but don't read it yet. 213134459Siedowse * We store the load address as a non-zero sh_addr value. 214134459Siedowse * Start with the code/data and bss. 215134459Siedowse */ 216134459Siedowse for (i = 0; i < hdr->e_shnum; i++) 217134459Siedowse shdr[i].sh_addr = 0; 218134459Siedowse for (i = 0; i < hdr->e_shnum; i++) { 219210423Savg if (shdr[i].sh_size == 0) 220210423Savg continue; 221134459Siedowse switch (shdr[i].sh_type) { 222134459Siedowse case SHT_PROGBITS: 223134459Siedowse case SHT_NOBITS: 224296438Sdim#if defined(__i386__) || defined(__amd64__) 225296438Sdim case SHT_AMD64_UNWIND: 226296438Sdim#endif 227134459Siedowse lastaddr = roundup(lastaddr, shdr[i].sh_addralign); 228134459Siedowse shdr[i].sh_addr = (Elf_Addr)lastaddr; 229134459Siedowse lastaddr += shdr[i].sh_size; 230134459Siedowse break; 231134459Siedowse } 232134459Siedowse } 233134459Siedowse 234134459Siedowse /* Symbols. */ 235134459Siedowse nsym = 0; 236134459Siedowse for (i = 0; i < hdr->e_shnum; i++) { 237134459Siedowse switch (shdr[i].sh_type) { 238134459Siedowse case SHT_SYMTAB: 239134459Siedowse nsym++; 240134459Siedowse ef->symtabindex = i; 241134459Siedowse shdr[i].sh_addr = (Elf_Addr)lastaddr; 242134459Siedowse lastaddr += shdr[i].sh_size; 243134459Siedowse break; 244134459Siedowse } 245134459Siedowse } 246134459Siedowse if (nsym != 1) { 247134459Siedowse printf("\nelf" __XSTRING(__ELF_WORD_SIZE) 248134459Siedowse "_obj_loadimage: file has no valid symbol table\n"); 249134459Siedowse goto out; 250134459Siedowse } 251134459Siedowse lastaddr = roundup(lastaddr, shdr[ef->symtabindex].sh_addralign); 252134459Siedowse shdr[ef->symtabindex].sh_addr = (Elf_Addr)lastaddr; 253134459Siedowse lastaddr += shdr[ef->symtabindex].sh_size; 254134459Siedowse 255134459Siedowse symstrindex = shdr[ef->symtabindex].sh_link; 256134459Siedowse if (symstrindex < 0 || symstrindex >= hdr->e_shnum || 257134459Siedowse shdr[symstrindex].sh_type != SHT_STRTAB) { 258134459Siedowse printf("\nelf" __XSTRING(__ELF_WORD_SIZE) 259134459Siedowse "_obj_loadimage: file has invalid symbol strings\n"); 260134459Siedowse goto out; 261134459Siedowse } 262134459Siedowse lastaddr = roundup(lastaddr, shdr[symstrindex].sh_addralign); 263134459Siedowse shdr[symstrindex].sh_addr = (Elf_Addr)lastaddr; 264134459Siedowse lastaddr += shdr[symstrindex].sh_size; 265134459Siedowse 266134459Siedowse /* Section names. */ 267134459Siedowse if (hdr->e_shstrndx == 0 || hdr->e_shstrndx >= hdr->e_shnum || 268134459Siedowse shdr[hdr->e_shstrndx].sh_type != SHT_STRTAB) { 269134459Siedowse printf("\nelf" __XSTRING(__ELF_WORD_SIZE) 270134459Siedowse "_obj_loadimage: file has no section names\n"); 271134459Siedowse goto out; 272134459Siedowse } 273134459Siedowse ef->shstrindex = hdr->e_shstrndx; 274134459Siedowse lastaddr = roundup(lastaddr, shdr[ef->shstrindex].sh_addralign); 275134459Siedowse shdr[ef->shstrindex].sh_addr = (Elf_Addr)lastaddr; 276134459Siedowse lastaddr += shdr[ef->shstrindex].sh_size; 277134459Siedowse 278134459Siedowse /* Relocation tables. */ 279134459Siedowse for (i = 0; i < hdr->e_shnum; i++) { 280134459Siedowse switch (shdr[i].sh_type) { 281134459Siedowse case SHT_REL: 282134459Siedowse case SHT_RELA: 283134459Siedowse lastaddr = roundup(lastaddr, shdr[i].sh_addralign); 284134459Siedowse shdr[i].sh_addr = (Elf_Addr)lastaddr; 285134459Siedowse lastaddr += shdr[i].sh_size; 286134459Siedowse break; 287134459Siedowse } 288134459Siedowse } 289134459Siedowse 290134459Siedowse /* Clear the whole area, including bss regions. */ 291134459Siedowse kern_bzero(firstaddr, lastaddr - firstaddr); 292134459Siedowse 293223295Skan /* Figure section with the lowest file offset we haven't loaded yet. */ 294223295Skan for (cshdr = NULL; /* none */; /* none */) 295223295Skan { 296223295Skan /* 297223295Skan * Find next section to load. The complexity of this loop is 298223295Skan * O(n^2), but with the number of sections being typically 299223295Skan * small, we do not care. 300223295Skan */ 301223295Skan lshdr = cshdr; 302223295Skan 303223295Skan for (i = 0; i < hdr->e_shnum; i++) { 304223295Skan if (shdr[i].sh_addr == 0 || 305223295Skan shdr[i].sh_type == SHT_NOBITS) 306223295Skan continue; 307223295Skan /* Skip sections that were loaded already. */ 308223295Skan if (lshdr != NULL && 309223295Skan lshdr->sh_offset >= shdr[i].sh_offset) 310223295Skan continue; 311223295Skan /* Find section with smallest offset. */ 312223295Skan if (cshdr == lshdr || 313223295Skan cshdr->sh_offset > shdr[i].sh_offset) 314223295Skan cshdr = &shdr[i]; 315223295Skan } 316223295Skan 317223295Skan if (cshdr == lshdr) 318223295Skan break; 319223295Skan 320223295Skan if (kern_pread(ef->fd, (vm_offset_t)cshdr->sh_addr, 321223295Skan cshdr->sh_size, (off_t)cshdr->sh_offset) != 0) { 322134459Siedowse printf("\nelf" __XSTRING(__ELF_WORD_SIZE) 323134459Siedowse "_obj_loadimage: read failed\n"); 324134459Siedowse goto out; 325134459Siedowse } 326134459Siedowse } 327134459Siedowse 328134459Siedowse file_addmetadata(fp, MODINFOMD_SHDR, shdrbytes, shdr); 329134459Siedowse 330134459Siedowse res = __elfN(obj_parse_modmetadata)(fp, ef); 331134459Siedowse if (res != 0) 332134459Siedowse goto out; 333134459Siedowse 334134459Siedowse ret = lastaddr - firstaddr; 335134459Siedowse fp->f_addr = firstaddr; 336134459Siedowse 337134459Siedowse printf("size 0x%lx at 0x%lx", (u_long)ret, (u_long)firstaddr); 338134459Siedowse 339134459Siedowseout: 340134459Siedowse printf("\n"); 341134459Siedowse return ret; 342134459Siedowse} 343134459Siedowse 344134459Siedowse#if defined(__i386__) && __ELF_WORD_SIZE == 64 345134459Siedowsestruct mod_metadata64 { 346134459Siedowse int md_version; /* structure version MDTV_* */ 347134459Siedowse int md_type; /* type of entry MDT_* */ 348134459Siedowse u_int64_t md_data; /* specific data */ 349134459Siedowse u_int64_t md_cval; /* common string label */ 350134459Siedowse}; 351134459Siedowse#endif 352134459Siedowse 353134459Siedowseint 354134459Siedowse__elfN(obj_parse_modmetadata)(struct preloaded_file *fp, elf_file_t ef) 355134459Siedowse{ 356134459Siedowse struct mod_metadata md; 357134459Siedowse#if defined(__i386__) && __ELF_WORD_SIZE == 64 358134459Siedowse struct mod_metadata64 md64; 359134459Siedowse#endif 360134459Siedowse struct mod_depend *mdepend; 361134459Siedowse struct mod_version mver; 362134459Siedowse char *s; 363134459Siedowse int error, modcnt, minfolen; 364134459Siedowse Elf_Addr v, p, p_stop; 365134459Siedowse 366134459Siedowse if (__elfN(obj_lookup_set)(fp, ef, "modmetadata_set", &p, &p_stop, 367134459Siedowse &modcnt) != 0) 368237338Sjhb return 0; 369134459Siedowse 370134459Siedowse modcnt = 0; 371134459Siedowse while (p < p_stop) { 372134459Siedowse COPYOUT(p, &v, sizeof(v)); 373134459Siedowse error = __elfN(obj_reloc_ptr)(fp, ef, p, &v, sizeof(v)); 374134459Siedowse if (error != 0) 375134459Siedowse return (error); 376134459Siedowse#if defined(__i386__) && __ELF_WORD_SIZE == 64 377134459Siedowse COPYOUT(v, &md64, sizeof(md64)); 378134459Siedowse error = __elfN(obj_reloc_ptr)(fp, ef, v, &md64, sizeof(md64)); 379134459Siedowse if (error != 0) 380134459Siedowse return (error); 381134459Siedowse md.md_version = md64.md_version; 382134459Siedowse md.md_type = md64.md_type; 383134459Siedowse md.md_cval = (const char *)(uintptr_t)md64.md_cval; 384134459Siedowse md.md_data = (void *)(uintptr_t)md64.md_data; 385134459Siedowse#else 386134459Siedowse COPYOUT(v, &md, sizeof(md)); 387134459Siedowse error = __elfN(obj_reloc_ptr)(fp, ef, v, &md, sizeof(md)); 388134459Siedowse if (error != 0) 389134459Siedowse return (error); 390134459Siedowse#endif 391134459Siedowse p += sizeof(Elf_Addr); 392134459Siedowse switch(md.md_type) { 393134459Siedowse case MDT_DEPEND: 394134459Siedowse s = strdupout((vm_offset_t)md.md_cval); 395134459Siedowse minfolen = sizeof(*mdepend) + strlen(s) + 1; 396134459Siedowse mdepend = malloc(minfolen); 397134459Siedowse if (mdepend == NULL) 398134459Siedowse return ENOMEM; 399134459Siedowse COPYOUT((vm_offset_t)md.md_data, mdepend, 400134459Siedowse sizeof(*mdepend)); 401134459Siedowse strcpy((char*)(mdepend + 1), s); 402134459Siedowse free(s); 403134459Siedowse file_addmetadata(fp, MODINFOMD_DEPLIST, minfolen, 404134459Siedowse mdepend); 405134459Siedowse free(mdepend); 406134459Siedowse break; 407134459Siedowse case MDT_VERSION: 408134459Siedowse s = strdupout((vm_offset_t)md.md_cval); 409134459Siedowse COPYOUT((vm_offset_t)md.md_data, &mver, sizeof(mver)); 410134459Siedowse file_addmodule(fp, s, mver.mv_version, NULL); 411134459Siedowse free(s); 412134459Siedowse modcnt++; 413134459Siedowse break; 414134459Siedowse case MDT_MODULE: 415298493Semaste case MDT_PNP_INFO: 416134459Siedowse break; 417134459Siedowse default: 418134459Siedowse printf("unknown type %d\n", md.md_type); 419134459Siedowse break; 420134459Siedowse } 421134459Siedowse } 422134459Siedowse return 0; 423134459Siedowse} 424134459Siedowse 425134459Siedowsestatic int 426134459Siedowse__elfN(obj_lookup_set)(struct preloaded_file *fp, elf_file_t ef, 427134459Siedowse const char* name, Elf_Addr *startp, Elf_Addr *stopp, int *countp) 428134459Siedowse{ 429134459Siedowse Elf_Ehdr *hdr; 430134459Siedowse Elf_Shdr *shdr; 431134459Siedowse char *p; 432134459Siedowse vm_offset_t shstrtab; 433134459Siedowse int i; 434134459Siedowse 435134459Siedowse hdr = &ef->hdr; 436134459Siedowse shdr = ef->e_shdr; 437134459Siedowse shstrtab = shdr[ef->shstrindex].sh_addr; 438134459Siedowse 439134459Siedowse for (i = 0; i < hdr->e_shnum; i++) { 440134459Siedowse if (shdr[i].sh_type != SHT_PROGBITS) 441134459Siedowse continue; 442134459Siedowse if (shdr[i].sh_name == 0) 443134459Siedowse continue; 444134459Siedowse p = strdupout(shstrtab + shdr[i].sh_name); 445134459Siedowse if (strncmp(p, "set_", 4) == 0 && strcmp(p + 4, name) == 0) { 446134459Siedowse *startp = shdr[i].sh_addr; 447134459Siedowse *stopp = shdr[i].sh_addr + shdr[i].sh_size; 448134459Siedowse *countp = (*stopp - *startp) / sizeof(Elf_Addr); 449134459Siedowse free(p); 450134459Siedowse return (0); 451134459Siedowse } 452134459Siedowse free(p); 453134459Siedowse } 454134459Siedowse 455134459Siedowse return (ESRCH); 456134459Siedowse} 457134459Siedowse 458134459Siedowse/* 459134459Siedowse * Apply any intra-module relocations to the value. p is the load address 460134459Siedowse * of the value and val/len is the value to be modified. This does NOT modify 461134459Siedowse * the image in-place, because this is done by kern_linker later on. 462134459Siedowse */ 463134459Siedowsestatic int 464134459Siedowse__elfN(obj_reloc_ptr)(struct preloaded_file *mp, elf_file_t ef, Elf_Addr p, 465134459Siedowse void *val, size_t len) 466134459Siedowse{ 467134459Siedowse Elf_Ehdr *hdr; 468134459Siedowse Elf_Shdr *shdr; 469134459Siedowse Elf_Addr off = p; 470134459Siedowse Elf_Addr base; 471134459Siedowse Elf_Rela a, *abase; 472134459Siedowse Elf_Rel r, *rbase; 473134459Siedowse int error, i, j, nrel, nrela; 474134459Siedowse 475134459Siedowse hdr = &ef->hdr; 476134459Siedowse shdr = ef->e_shdr; 477134459Siedowse 478134459Siedowse for (i = 0; i < hdr->e_shnum; i++) { 479134459Siedowse if (shdr[i].sh_type != SHT_RELA && shdr[i].sh_type != SHT_REL) 480134459Siedowse continue; 481134459Siedowse base = shdr[shdr[i].sh_info].sh_addr; 482134459Siedowse if (base == 0 || shdr[i].sh_addr == 0) 483134459Siedowse continue; 484134459Siedowse if (off < base || off + len > base + 485134459Siedowse shdr[shdr[i].sh_info].sh_size) 486134459Siedowse continue; 487134459Siedowse 488134459Siedowse switch (shdr[i].sh_type) { 489134459Siedowse case SHT_RELA: 490134459Siedowse abase = (Elf_Rela *)(intptr_t)shdr[i].sh_addr; 491134459Siedowse 492134459Siedowse nrela = shdr[i].sh_size / sizeof(Elf_Rela); 493134459Siedowse for (j = 0; j < nrela; j++) { 494134459Siedowse COPYOUT(abase + j, &a, sizeof(a)); 495134459Siedowse 496134459Siedowse error = __elfN(reloc)(ef, __elfN(obj_symaddr), 497134459Siedowse &a, ELF_RELOC_RELA, base, off, val, len); 498134459Siedowse if (error != 0) 499134459Siedowse return (error); 500134459Siedowse } 501134459Siedowse break; 502134459Siedowse case SHT_REL: 503134459Siedowse rbase = (Elf_Rel *)(intptr_t)shdr[i].sh_addr; 504134459Siedowse 505134459Siedowse nrel = shdr[i].sh_size / sizeof(Elf_Rel); 506134459Siedowse for (j = 0; j < nrel; j++) { 507134459Siedowse COPYOUT(rbase + j, &r, sizeof(r)); 508134459Siedowse 509134459Siedowse error = __elfN(reloc)(ef, __elfN(obj_symaddr), 510134459Siedowse &r, ELF_RELOC_REL, base, off, val, len); 511134459Siedowse if (error != 0) 512134459Siedowse return (error); 513134459Siedowse } 514134459Siedowse break; 515134459Siedowse } 516134459Siedowse } 517134459Siedowse return (0); 518134459Siedowse} 519134459Siedowse 520134459Siedowse/* Look up the address of a specified symbol. */ 521134459Siedowsestatic Elf_Addr 522153504Smarcel__elfN(obj_symaddr)(struct elf_file *ef, Elf_Size symidx) 523134459Siedowse{ 524134459Siedowse Elf_Sym sym; 525134459Siedowse Elf_Addr base; 526134459Siedowse 527294981Ssmh if (symidx >= ef->e_shdr[ef->symtabindex].sh_size / sizeof(Elf_Sym)) 528134459Siedowse return (0); 529134459Siedowse COPYOUT(ef->e_shdr[ef->symtabindex].sh_addr + symidx * sizeof(Elf_Sym), 530134459Siedowse &sym, sizeof(sym)); 531134459Siedowse if (sym.st_shndx == SHN_UNDEF || sym.st_shndx >= ef->hdr.e_shnum) 532134459Siedowse return (0); 533134459Siedowse base = ef->e_shdr[sym.st_shndx].sh_addr; 534134459Siedowse if (base == 0) 535134459Siedowse return (0); 536134459Siedowse return (base + sym.st_value); 537134459Siedowse} 538