1 /* 2 * QEMU Executable loader 3 * 4 * Copyright (c) 2006 Fabrice Bellard 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a copy 7 * of this software and associated documentation files (the "Software"), to deal 8 * in the Software without restriction, including without limitation the rights 9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 10 * copies of the Software, and to permit persons to whom the Software is 11 * furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 22 * THE SOFTWARE. 23 * 24 * Gunzip functionality in this file is derived from u-boot: 25 * 26 * (C) Copyright 2008 Semihalf 27 * 28 * (C) Copyright 2000-2005 29 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. 30 * 31 * This program is free software; you can redistribute it and/or 32 * modify it under the terms of the GNU General Public License as 33 * published by the Free Software Foundation; either version 2 of 34 * the License, or (at your option) any later version. 35 * 36 * This program is distributed in the hope that it will be useful, 37 * but WITHOUT ANY WARRANTY; without even the implied warranty of 38 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 39 * GNU General Public License for more details. 40 * 41 * You should have received a copy of the GNU General Public License along 42 * with this program; if not, see <http://www.gnu.org/licenses/>. 43 */ 44 45 #include "hw/hw.h" 46 #include "disas/disas.h" 47 #include "monitor/monitor.h" 48 #include "sysemu/sysemu.h" 49 #include "uboot_image.h" 50 #include "hw/loader.h" 51 #include "hw/nvram/fw_cfg.h" 52 #include "exec/memory.h" 53 #include "exec/address-spaces.h" 54 55 #include <zlib.h> 56 57 static int roms_loaded; 58 59 /* return the size or -1 if error */ 60 int get_image_size(const char *filename) 61 { 62 int fd, size; 63 fd = open(filename, O_RDONLY | O_BINARY); 64 if (fd < 0) 65 return -1; 66 size = lseek(fd, 0, SEEK_END); 67 close(fd); 68 return size; 69 } 70 71 /* return the size or -1 if error */ 72 /* deprecated, because caller does not specify buffer size! */ 73 int load_image(const char *filename, uint8_t *addr) 74 { 75 int fd, size; 76 fd = open(filename, O_RDONLY | O_BINARY); 77 if (fd < 0) 78 return -1; 79 size = lseek(fd, 0, SEEK_END); 80 lseek(fd, 0, SEEK_SET); 81 if (read(fd, addr, size) != size) { 82 close(fd); 83 return -1; 84 } 85 close(fd); 86 return size; 87 } 88 89 /* read()-like version */ 90 ssize_t read_targphys(const char *name, 91 int fd, hwaddr dst_addr, size_t nbytes) 92 { 93 uint8_t *buf; 94 ssize_t did; 95 96 buf = g_malloc(nbytes); 97 did = read(fd, buf, nbytes); 98 if (did > 0) 99 rom_add_blob_fixed("read", buf, did, dst_addr); 100 g_free(buf); 101 return did; 102 } 103 104 /* return the size or -1 if error */ 105 int load_image_targphys(const char *filename, 106 hwaddr addr, uint64_t max_sz) 107 { 108 int size; 109 110 size = get_image_size(filename); 111 if (size > max_sz) { 112 return -1; 113 } 114 if (size > 0) { 115 rom_add_file_fixed(filename, addr, -1); 116 } 117 return size; 118 } 119 120 void pstrcpy_targphys(const char *name, hwaddr dest, int buf_size, 121 const char *source) 122 { 123 const char *nulp; 124 char *ptr; 125 126 if (buf_size <= 0) return; 127 nulp = memchr(source, 0, buf_size); 128 if (nulp) { 129 rom_add_blob_fixed(name, source, (nulp - source) + 1, dest); 130 } else { 131 rom_add_blob_fixed(name, source, buf_size, dest); 132 ptr = rom_ptr(dest + buf_size - 1); 133 *ptr = 0; 134 } 135 } 136 137 /* A.OUT loader */ 138 139 struct exec 140 { 141 uint32_t a_info; /* Use macros N_MAGIC, etc for access */ 142 uint32_t a_text; /* length of text, in bytes */ 143 uint32_t a_data; /* length of data, in bytes */ 144 uint32_t a_bss; /* length of uninitialized data area, in bytes */ 145 uint32_t a_syms; /* length of symbol table data in file, in bytes */ 146 uint32_t a_entry; /* start address */ 147 uint32_t a_trsize; /* length of relocation info for text, in bytes */ 148 uint32_t a_drsize; /* length of relocation info for data, in bytes */ 149 }; 150 151 static void bswap_ahdr(struct exec *e) 152 { 153 bswap32s(&e->a_info); 154 bswap32s(&e->a_text); 155 bswap32s(&e->a_data); 156 bswap32s(&e->a_bss); 157 bswap32s(&e->a_syms); 158 bswap32s(&e->a_entry); 159 bswap32s(&e->a_trsize); 160 bswap32s(&e->a_drsize); 161 } 162 163 #define N_MAGIC(exec) ((exec).a_info & 0xffff) 164 #define OMAGIC 0407 165 #define NMAGIC 0410 166 #define ZMAGIC 0413 167 #define QMAGIC 0314 168 #define _N_HDROFF(x) (1024 - sizeof (struct exec)) 169 #define N_TXTOFF(x) \ 170 (N_MAGIC(x) == ZMAGIC ? _N_HDROFF((x)) + sizeof (struct exec) : \ 171 (N_MAGIC(x) == QMAGIC ? 0 : sizeof (struct exec))) 172 #define N_TXTADDR(x, target_page_size) (N_MAGIC(x) == QMAGIC ? target_page_size : 0) 173 #define _N_SEGMENT_ROUND(x, target_page_size) (((x) + target_page_size - 1) & ~(target_page_size - 1)) 174 175 #define _N_TXTENDADDR(x, target_page_size) (N_TXTADDR(x, target_page_size)+(x).a_text) 176 177 #define N_DATADDR(x, target_page_size) \ 178 (N_MAGIC(x)==OMAGIC? (_N_TXTENDADDR(x, target_page_size)) \ 179 : (_N_SEGMENT_ROUND (_N_TXTENDADDR(x, target_page_size), target_page_size))) 180 181 182 int load_aout(const char *filename, hwaddr addr, int max_sz, 183 int bswap_needed, hwaddr target_page_size) 184 { 185 int fd; 186 ssize_t size, ret; 187 struct exec e; 188 uint32_t magic; 189 190 fd = open(filename, O_RDONLY | O_BINARY); 191 if (fd < 0) 192 return -1; 193 194 size = read(fd, &e, sizeof(e)); 195 if (size < 0) 196 goto fail; 197 198 if (bswap_needed) { 199 bswap_ahdr(&e); 200 } 201 202 magic = N_MAGIC(e); 203 switch (magic) { 204 case ZMAGIC: 205 case QMAGIC: 206 case OMAGIC: 207 if (e.a_text + e.a_data > max_sz) 208 goto fail; 209 lseek(fd, N_TXTOFF(e), SEEK_SET); 210 size = read_targphys(filename, fd, addr, e.a_text + e.a_data); 211 if (size < 0) 212 goto fail; 213 break; 214 case NMAGIC: 215 if (N_DATADDR(e, target_page_size) + e.a_data > max_sz) 216 goto fail; 217 lseek(fd, N_TXTOFF(e), SEEK_SET); 218 size = read_targphys(filename, fd, addr, e.a_text); 219 if (size < 0) 220 goto fail; 221 ret = read_targphys(filename, fd, addr + N_DATADDR(e, target_page_size), 222 e.a_data); 223 if (ret < 0) 224 goto fail; 225 size += ret; 226 break; 227 default: 228 goto fail; 229 } 230 close(fd); 231 return size; 232 fail: 233 close(fd); 234 return -1; 235 } 236 237 /* ELF loader */ 238 239 static void *load_at(int fd, int offset, int size) 240 { 241 void *ptr; 242 if (lseek(fd, offset, SEEK_SET) < 0) 243 return NULL; 244 ptr = g_malloc(size); 245 if (read(fd, ptr, size) != size) { 246 g_free(ptr); 247 return NULL; 248 } 249 return ptr; 250 } 251 252 #ifdef ELF_CLASS 253 #undef ELF_CLASS 254 #endif 255 256 #define ELF_CLASS ELFCLASS32 257 #include "elf.h" 258 259 #define SZ 32 260 #define elf_word uint32_t 261 #define elf_sword int32_t 262 #define bswapSZs bswap32s 263 #include "hw/elf_ops.h" 264 265 #undef elfhdr 266 #undef elf_phdr 267 #undef elf_shdr 268 #undef elf_sym 269 #undef elf_note 270 #undef elf_word 271 #undef elf_sword 272 #undef bswapSZs 273 #undef SZ 274 #define elfhdr elf64_hdr 275 #define elf_phdr elf64_phdr 276 #define elf_note elf64_note 277 #define elf_shdr elf64_shdr 278 #define elf_sym elf64_sym 279 #define elf_word uint64_t 280 #define elf_sword int64_t 281 #define bswapSZs bswap64s 282 #define SZ 64 283 #include "hw/elf_ops.h" 284 285 /* return < 0 if error, otherwise the number of bytes loaded in memory */ 286 int load_elf(const char *filename, uint64_t (*translate_fn)(void *, uint64_t), 287 void *translate_opaque, uint64_t *pentry, uint64_t *lowaddr, 288 uint64_t *highaddr, int big_endian, int elf_machine, int clear_lsb) 289 { 290 int fd, data_order, target_data_order, must_swab, ret; 291 uint8_t e_ident[EI_NIDENT]; 292 293 fd = open(filename, O_RDONLY | O_BINARY); 294 if (fd < 0) { 295 perror(filename); 296 return -1; 297 } 298 if (read(fd, e_ident, sizeof(e_ident)) != sizeof(e_ident)) 299 goto fail; 300 if (e_ident[0] != ELFMAG0 || 301 e_ident[1] != ELFMAG1 || 302 e_ident[2] != ELFMAG2 || 303 e_ident[3] != ELFMAG3) 304 goto fail; 305 #ifdef HOST_WORDS_BIGENDIAN 306 data_order = ELFDATA2MSB; 307 #else 308 data_order = ELFDATA2LSB; 309 #endif 310 must_swab = data_order != e_ident[EI_DATA]; 311 if (big_endian) { 312 target_data_order = ELFDATA2MSB; 313 } else { 314 target_data_order = ELFDATA2LSB; 315 } 316 317 if (target_data_order != e_ident[EI_DATA]) { 318 goto fail; 319 } 320 321 lseek(fd, 0, SEEK_SET); 322 if (e_ident[EI_CLASS] == ELFCLASS64) { 323 ret = load_elf64(filename, fd, translate_fn, translate_opaque, must_swab, 324 pentry, lowaddr, highaddr, elf_machine, clear_lsb); 325 } else { 326 ret = load_elf32(filename, fd, translate_fn, translate_opaque, must_swab, 327 pentry, lowaddr, highaddr, elf_machine, clear_lsb); 328 } 329 330 close(fd); 331 return ret; 332 333 fail: 334 close(fd); 335 return -1; 336 } 337 338 static void bswap_uboot_header(uboot_image_header_t *hdr) 339 { 340 #ifndef HOST_WORDS_BIGENDIAN 341 bswap32s(&hdr->ih_magic); 342 bswap32s(&hdr->ih_hcrc); 343 bswap32s(&hdr->ih_time); 344 bswap32s(&hdr->ih_size); 345 bswap32s(&hdr->ih_load); 346 bswap32s(&hdr->ih_ep); 347 bswap32s(&hdr->ih_dcrc); 348 #endif 349 } 350 351 352 #define ZALLOC_ALIGNMENT 16 353 354 static void *zalloc(void *x, unsigned items, unsigned size) 355 { 356 void *p; 357 358 size *= items; 359 size = (size + ZALLOC_ALIGNMENT - 1) & ~(ZALLOC_ALIGNMENT - 1); 360 361 p = g_malloc(size); 362 363 return (p); 364 } 365 366 static void zfree(void *x, void *addr) 367 { 368 g_free(addr); 369 } 370 371 372 #define HEAD_CRC 2 373 #define EXTRA_FIELD 4 374 #define ORIG_NAME 8 375 #define COMMENT 0x10 376 #define RESERVED 0xe0 377 378 #define DEFLATED 8 379 380 /* This is the usual maximum in uboot, so if a uImage overflows this, it would 381 * overflow on real hardware too. */ 382 #define UBOOT_MAX_GUNZIP_BYTES (64 << 20) 383 384 static ssize_t gunzip(void *dst, size_t dstlen, uint8_t *src, 385 size_t srclen) 386 { 387 z_stream s; 388 ssize_t dstbytes; 389 int r, i, flags; 390 391 /* skip header */ 392 i = 10; 393 flags = src[3]; 394 if (src[2] != DEFLATED || (flags & RESERVED) != 0) { 395 puts ("Error: Bad gzipped data\n"); 396 return -1; 397 } 398 if ((flags & EXTRA_FIELD) != 0) 399 i = 12 + src[10] + (src[11] << 8); 400 if ((flags & ORIG_NAME) != 0) 401 while (src[i++] != 0) 402 ; 403 if ((flags & COMMENT) != 0) 404 while (src[i++] != 0) 405 ; 406 if ((flags & HEAD_CRC) != 0) 407 i += 2; 408 if (i >= srclen) { 409 puts ("Error: gunzip out of data in header\n"); 410 return -1; 411 } 412 413 s.zalloc = zalloc; 414 s.zfree = zfree; 415 416 r = inflateInit2(&s, -MAX_WBITS); 417 if (r != Z_OK) { 418 printf ("Error: inflateInit2() returned %d\n", r); 419 return (-1); 420 } 421 s.next_in = src + i; 422 s.avail_in = srclen - i; 423 s.next_out = dst; 424 s.avail_out = dstlen; 425 r = inflate(&s, Z_FINISH); 426 if (r != Z_OK && r != Z_STREAM_END) { 427 printf ("Error: inflate() returned %d\n", r); 428 return -1; 429 } 430 dstbytes = s.next_out - (unsigned char *) dst; 431 inflateEnd(&s); 432 433 return dstbytes; 434 } 435 436 /* Load a U-Boot image. */ 437 int load_uimage(const char *filename, hwaddr *ep, 438 hwaddr *loadaddr, int *is_linux) 439 { 440 int fd; 441 int size; 442 uboot_image_header_t h; 443 uboot_image_header_t *hdr = &h; 444 uint8_t *data = NULL; 445 int ret = -1; 446 447 fd = open(filename, O_RDONLY | O_BINARY); 448 if (fd < 0) 449 return -1; 450 451 size = read(fd, hdr, sizeof(uboot_image_header_t)); 452 if (size < 0) 453 goto out; 454 455 bswap_uboot_header(hdr); 456 457 if (hdr->ih_magic != IH_MAGIC) 458 goto out; 459 460 /* TODO: Implement other image types. */ 461 if (hdr->ih_type != IH_TYPE_KERNEL) { 462 fprintf(stderr, "Can only load u-boot image type \"kernel\"\n"); 463 goto out; 464 } 465 466 switch (hdr->ih_comp) { 467 case IH_COMP_NONE: 468 case IH_COMP_GZIP: 469 break; 470 default: 471 fprintf(stderr, 472 "Unable to load u-boot images with compression type %d\n", 473 hdr->ih_comp); 474 goto out; 475 } 476 477 /* TODO: Check CPU type. */ 478 if (is_linux) { 479 if (hdr->ih_os == IH_OS_LINUX) 480 *is_linux = 1; 481 else 482 *is_linux = 0; 483 } 484 485 *ep = hdr->ih_ep; 486 data = g_malloc(hdr->ih_size); 487 488 if (read(fd, data, hdr->ih_size) != hdr->ih_size) { 489 fprintf(stderr, "Error reading file\n"); 490 goto out; 491 } 492 493 if (hdr->ih_comp == IH_COMP_GZIP) { 494 uint8_t *compressed_data; 495 size_t max_bytes; 496 ssize_t bytes; 497 498 compressed_data = data; 499 max_bytes = UBOOT_MAX_GUNZIP_BYTES; 500 data = g_malloc(max_bytes); 501 502 bytes = gunzip(data, max_bytes, compressed_data, hdr->ih_size); 503 g_free(compressed_data); 504 if (bytes < 0) { 505 fprintf(stderr, "Unable to decompress gzipped image!\n"); 506 goto out; 507 } 508 hdr->ih_size = bytes; 509 } 510 511 rom_add_blob_fixed(filename, data, hdr->ih_size, hdr->ih_load); 512 513 if (loadaddr) 514 *loadaddr = hdr->ih_load; 515 516 ret = hdr->ih_size; 517 518 out: 519 if (data) 520 g_free(data); 521 close(fd); 522 return ret; 523 } 524 525 /* 526 * Functions for reboot-persistent memory regions. 527 * - used for vga bios and option roms. 528 * - also linux kernel (-kernel / -initrd). 529 */ 530 531 typedef struct Rom Rom; 532 533 struct Rom { 534 char *name; 535 char *path; 536 537 /* datasize is the amount of memory allocated in "data". If datasize is less 538 * than romsize, it means that the area from datasize to romsize is filled 539 * with zeros. 540 */ 541 size_t romsize; 542 size_t datasize; 543 544 uint8_t *data; 545 int isrom; 546 char *fw_dir; 547 char *fw_file; 548 549 hwaddr addr; 550 QTAILQ_ENTRY(Rom) next; 551 }; 552 553 static FWCfgState *fw_cfg; 554 static QTAILQ_HEAD(, Rom) roms = QTAILQ_HEAD_INITIALIZER(roms); 555 556 static void rom_insert(Rom *rom) 557 { 558 Rom *item; 559 560 if (roms_loaded) { 561 hw_error ("ROM images must be loaded at startup\n"); 562 } 563 564 /* list is ordered by load address */ 565 QTAILQ_FOREACH(item, &roms, next) { 566 if (rom->addr >= item->addr) 567 continue; 568 QTAILQ_INSERT_BEFORE(item, rom, next); 569 return; 570 } 571 QTAILQ_INSERT_TAIL(&roms, rom, next); 572 } 573 574 int rom_add_file(const char *file, const char *fw_dir, 575 hwaddr addr, int32_t bootindex) 576 { 577 Rom *rom; 578 int rc, fd = -1; 579 char devpath[100]; 580 581 rom = g_malloc0(sizeof(*rom)); 582 rom->name = g_strdup(file); 583 rom->path = qemu_find_file(QEMU_FILE_TYPE_BIOS, rom->name); 584 if (rom->path == NULL) { 585 rom->path = g_strdup(file); 586 } 587 588 fd = open(rom->path, O_RDONLY | O_BINARY); 589 if (fd == -1) { 590 fprintf(stderr, "Could not open option rom '%s': %s\n", 591 rom->path, strerror(errno)); 592 goto err; 593 } 594 595 if (fw_dir) { 596 rom->fw_dir = g_strdup(fw_dir); 597 rom->fw_file = g_strdup(file); 598 } 599 rom->addr = addr; 600 rom->romsize = lseek(fd, 0, SEEK_END); 601 rom->datasize = rom->romsize; 602 rom->data = g_malloc0(rom->datasize); 603 lseek(fd, 0, SEEK_SET); 604 rc = read(fd, rom->data, rom->datasize); 605 if (rc != rom->datasize) { 606 fprintf(stderr, "rom: file %-20s: read error: rc=%d (expected %zd)\n", 607 rom->name, rc, rom->datasize); 608 goto err; 609 } 610 close(fd); 611 rom_insert(rom); 612 if (rom->fw_file && fw_cfg) { 613 const char *basename; 614 char fw_file_name[56]; 615 616 basename = strrchr(rom->fw_file, '/'); 617 if (basename) { 618 basename++; 619 } else { 620 basename = rom->fw_file; 621 } 622 snprintf(fw_file_name, sizeof(fw_file_name), "%s/%s", rom->fw_dir, 623 basename); 624 fw_cfg_add_file(fw_cfg, fw_file_name, rom->data, rom->romsize); 625 snprintf(devpath, sizeof(devpath), "/rom@%s", fw_file_name); 626 } else { 627 snprintf(devpath, sizeof(devpath), "/rom@" TARGET_FMT_plx, addr); 628 } 629 630 add_boot_device_path(bootindex, NULL, devpath); 631 return 0; 632 633 err: 634 if (fd != -1) 635 close(fd); 636 g_free(rom->data); 637 g_free(rom->path); 638 g_free(rom->name); 639 g_free(rom); 640 return -1; 641 } 642 643 int rom_add_blob(const char *name, const void *blob, size_t len, 644 hwaddr addr) 645 { 646 Rom *rom; 647 648 rom = g_malloc0(sizeof(*rom)); 649 rom->name = g_strdup(name); 650 rom->addr = addr; 651 rom->romsize = len; 652 rom->datasize = len; 653 rom->data = g_malloc0(rom->datasize); 654 memcpy(rom->data, blob, len); 655 rom_insert(rom); 656 return 0; 657 } 658 659 /* This function is specific for elf program because we don't need to allocate 660 * all the rom. We just allocate the first part and the rest is just zeros. This 661 * is why romsize and datasize are different. Also, this function seize the 662 * memory ownership of "data", so we don't have to allocate and copy the buffer. 663 */ 664 int rom_add_elf_program(const char *name, void *data, size_t datasize, 665 size_t romsize, hwaddr addr) 666 { 667 Rom *rom; 668 669 rom = g_malloc0(sizeof(*rom)); 670 rom->name = g_strdup(name); 671 rom->addr = addr; 672 rom->datasize = datasize; 673 rom->romsize = romsize; 674 rom->data = data; 675 rom_insert(rom); 676 return 0; 677 } 678 679 int rom_add_vga(const char *file) 680 { 681 return rom_add_file(file, "vgaroms", 0, -1); 682 } 683 684 int rom_add_option(const char *file, int32_t bootindex) 685 { 686 return rom_add_file(file, "genroms", 0, bootindex); 687 } 688 689 static void rom_reset(void *unused) 690 { 691 Rom *rom; 692 693 QTAILQ_FOREACH(rom, &roms, next) { 694 if (rom->fw_file) { 695 continue; 696 } 697 if (rom->data == NULL) { 698 continue; 699 } 700 cpu_physical_memory_write_rom(rom->addr, rom->data, rom->datasize); 701 if (rom->isrom) { 702 /* rom needs to be written only once */ 703 g_free(rom->data); 704 rom->data = NULL; 705 } 706 } 707 } 708 709 int rom_load_all(void) 710 { 711 hwaddr addr = 0; 712 MemoryRegionSection section; 713 Rom *rom; 714 715 QTAILQ_FOREACH(rom, &roms, next) { 716 if (rom->fw_file) { 717 continue; 718 } 719 if (addr > rom->addr) { 720 fprintf(stderr, "rom: requested regions overlap " 721 "(rom %s. free=0x" TARGET_FMT_plx 722 ", addr=0x" TARGET_FMT_plx ")\n", 723 rom->name, addr, rom->addr); 724 return -1; 725 } 726 addr = rom->addr; 727 addr += rom->romsize; 728 section = memory_region_find(get_system_memory(), rom->addr, 1); 729 rom->isrom = int128_nz(section.size) && memory_region_is_rom(section.mr); 730 memory_region_unref(section.mr); 731 } 732 qemu_register_reset(rom_reset, NULL); 733 roms_loaded = 1; 734 return 0; 735 } 736 737 void rom_set_fw(FWCfgState *f) 738 { 739 fw_cfg = f; 740 } 741 742 static Rom *find_rom(hwaddr addr) 743 { 744 Rom *rom; 745 746 QTAILQ_FOREACH(rom, &roms, next) { 747 if (rom->fw_file) { 748 continue; 749 } 750 if (rom->addr > addr) { 751 continue; 752 } 753 if (rom->addr + rom->romsize < addr) { 754 continue; 755 } 756 return rom; 757 } 758 return NULL; 759 } 760 761 /* 762 * Copies memory from registered ROMs to dest. Any memory that is contained in 763 * a ROM between addr and addr + size is copied. Note that this can involve 764 * multiple ROMs, which need not start at addr and need not end at addr + size. 765 */ 766 int rom_copy(uint8_t *dest, hwaddr addr, size_t size) 767 { 768 hwaddr end = addr + size; 769 uint8_t *s, *d = dest; 770 size_t l = 0; 771 Rom *rom; 772 773 QTAILQ_FOREACH(rom, &roms, next) { 774 if (rom->fw_file) { 775 continue; 776 } 777 if (rom->addr + rom->romsize < addr) { 778 continue; 779 } 780 if (rom->addr > end) { 781 break; 782 } 783 if (!rom->data) { 784 continue; 785 } 786 787 d = dest + (rom->addr - addr); 788 s = rom->data; 789 l = rom->datasize; 790 791 if ((d + l) > (dest + size)) { 792 l = dest - d; 793 } 794 795 memcpy(d, s, l); 796 797 if (rom->romsize > rom->datasize) { 798 /* If datasize is less than romsize, it means that we didn't 799 * allocate all the ROM because the trailing data are only zeros. 800 */ 801 802 d += l; 803 l = rom->romsize - rom->datasize; 804 805 if ((d + l) > (dest + size)) { 806 /* Rom size doesn't fit in the destination area. Adjust to avoid 807 * overflow. 808 */ 809 l = dest - d; 810 } 811 812 if (l > 0) { 813 memset(d, 0x0, l); 814 } 815 } 816 } 817 818 return (d + l) - dest; 819 } 820 821 void *rom_ptr(hwaddr addr) 822 { 823 Rom *rom; 824 825 rom = find_rom(addr); 826 if (!rom || !rom->data) 827 return NULL; 828 return rom->data + (addr - rom->addr); 829 } 830 831 void do_info_roms(Monitor *mon, const QDict *qdict) 832 { 833 Rom *rom; 834 835 QTAILQ_FOREACH(rom, &roms, next) { 836 if (!rom->fw_file) { 837 monitor_printf(mon, "addr=" TARGET_FMT_plx 838 " size=0x%06zx mem=%s name=\"%s\"\n", 839 rom->addr, rom->romsize, 840 rom->isrom ? "rom" : "ram", 841 rom->name); 842 } else { 843 monitor_printf(mon, "fw=%s/%s" 844 " size=0x%06zx name=\"%s\"\n", 845 rom->fw_dir, 846 rom->fw_file, 847 rom->romsize, 848 rom->name); 849 } 850 } 851 } 852