hw/core/loader.c

   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 bool option_rom_has_mr = false;
  58 bool rom_file_has_mr = true;
  59
  60 static int roms_loaded;
  61
  62 /* return the size or -1 if error */
  63 int get_image_size(const char *filename)
  64 {
  65     int fd, size;
  66     fd = open(filename, O_RDONLY | O_BINARY);
  67     if (fd < 0)
  68         return -1;
  69     size = lseek(fd, 0, SEEK_END);
  70     close(fd);
  71     return size;
  72 }
  73
  74 /* return the size or -1 if error */
  75 /* deprecated, because caller does not specify buffer size! */
  76 int load_image(const char *filename, uint8_t *addr)
  77 {
  78     int fd, size;
  79     fd = open(filename, O_RDONLY | O_BINARY);
  80     if (fd < 0)
  81         return -1;
  82     size = lseek(fd, 0, SEEK_END);
  83     if (size == -1) {
  84         fprintf(stderr, "file %-20s: get size error: %s\n",
  85                 filename, strerror(errno));
  86         close(fd);
  87         return -1;
  88     }
  89
  90     lseek(fd, 0, SEEK_SET);
  91     if (read(fd, addr, size) != size) {
  92         close(fd);
  93         return -1;
  94     }
  95     close(fd);
  96     return size;
  97 }
  98
  99 /* return the size or -1 if error */
 100 ssize_t load_image_size(const char *filename, void *addr, size_t size)
 101 {
 102     int fd;
 103     ssize_t actsize;
 104
 105     fd = open(filename, O_RDONLY | O_BINARY);
 106     if (fd < 0) {
 107         return -1;
 108     }
 109
 110     actsize = read(fd, addr, size);
 111     if (actsize < 0) {
 112         close(fd);
 113         return -1;
 114     }
 115     close(fd);
 116
 117     return actsize;
 118 }
 119
 120 /* read()-like version */
 121 ssize_t read_targphys(const char *name,
 122                       int fd, hwaddr dst_addr, size_t nbytes)
 123 {
 124     uint8_t *buf;
 125     ssize_t did;
 126
 127     buf = g_malloc(nbytes);
 128     did = read(fd, buf, nbytes);
 129     if (did > 0)
 130         rom_add_blob_fixed("read", buf, did, dst_addr);
 131     g_free(buf);
 132     return did;
 133 }
 134
 135 /* return the size or -1 if error */
 136 int load_image_targphys(const char *filename,
 137                         hwaddr addr, uint64_t max_sz)
 138 {
 139     int size;
 140
 141     size = get_image_size(filename);
 142     if (size > max_sz) {
 143         return -1;
 144     }
 145     if (size > 0) {
 146         rom_add_file_fixed(filename, addr, -1);
 147     }
 148     return size;
 149 }
 150
 151 void pstrcpy_targphys(const char *name, hwaddr dest, int buf_size,
 152                       const char *source)
 153 {
 154     const char *nulp;
 155     char *ptr;
 156
 157     if (buf_size <= 0) return;
 158     nulp = memchr(source, 0, buf_size);
 159     if (nulp) {
 160         rom_add_blob_fixed(name, source, (nulp - source) + 1, dest);
 161     } else {
 162         rom_add_blob_fixed(name, source, buf_size, dest);
 163         ptr = rom_ptr(dest + buf_size - 1);
 164         *ptr = 0;
 165     }
 166 }
 167
 168 /* A.OUT loader */
 169
 170 struct exec
 171 {
 172   uint32_t a_info;   /* Use macros N_MAGIC, etc for access */
 173   uint32_t a_text;   /* length of text, in bytes */
 174   uint32_t a_data;   /* length of data, in bytes */
 175   uint32_t a_bss;    /* length of uninitialized data area, in bytes */
 176   uint32_t a_syms;   /* length of symbol table data in file, in bytes */
 177   uint32_t a_entry;  /* start address */
 178   uint32_t a_trsize; /* length of relocation info for text, in bytes */
 179   uint32_t a_drsize; /* length of relocation info for data, in bytes */
 180 };
 181
 182 static void bswap_ahdr(struct exec *e)
 183 {
 184     bswap32s(&e->a_info);
 185     bswap32s(&e->a_text);
 186     bswap32s(&e->a_data);
 187     bswap32s(&e->a_bss);
 188     bswap32s(&e->a_syms);
 189     bswap32s(&e->a_entry);
 190     bswap32s(&e->a_trsize);
 191     bswap32s(&e->a_drsize);
 192 }
 193
 194 #define N_MAGIC(exec) ((exec).a_info & 0xffff)
 195 #define OMAGIC 0407
 196 #define NMAGIC 0410
 197 #define ZMAGIC 0413
 198 #define QMAGIC 0314
 199 #define _N_HDROFF(x) (1024 - sizeof (struct exec))
 200 #define N_TXTOFF(x)                                                     \
 201     (N_MAGIC(x) == ZMAGIC ? _N_HDROFF((x)) + sizeof (struct exec) :     \
 202      (N_MAGIC(x) == QMAGIC ? 0 : sizeof (struct exec)))
 203 #define N_TXTADDR(x, target_page_size) (N_MAGIC(x) == QMAGIC ? target_page_size : 0)
 204 #define _N_SEGMENT_ROUND(x, target_page_size) (((x) + target_page_size - 1) & ~(target_page_size - 1))
 205
 206 #define _N_TXTENDADDR(x, target_page_size) (N_TXTADDR(x, target_page_size)+(x).a_text)
 207
 208 #define N_DATADDR(x, target_page_size) \
 209     (N_MAGIC(x)==OMAGIC? (_N_TXTENDADDR(x, target_page_size)) \
 210      : (_N_SEGMENT_ROUND (_N_TXTENDADDR(x, target_page_size), target_page_size)))
 211
 212
 213 int load_aout(const char *filename, hwaddr addr, int max_sz,
 214               int bswap_needed, hwaddr target_page_size)
 215 {
 216     int fd;
 217     ssize_t size, ret;
 218     struct exec e;
 219     uint32_t magic;
 220
 221     fd = open(filename, O_RDONLY | O_BINARY);
 222     if (fd < 0)
 223         return -1;
 224
 225     size = read(fd, &e, sizeof(e));
 226     if (size < 0)
 227         goto fail;
 228
 229     if (bswap_needed) {
 230         bswap_ahdr(&e);
 231     }
 232
 233     magic = N_MAGIC(e);
 234     switch (magic) {
 235     case ZMAGIC:
 236     case QMAGIC:
 237     case OMAGIC:
 238         if (e.a_text + e.a_data > max_sz)
 239             goto fail;
 240         lseek(fd, N_TXTOFF(e), SEEK_SET);
 241         size = read_targphys(filename, fd, addr, e.a_text + e.a_data);
 242         if (size < 0)
 243             goto fail;
 244         break;
 245     case NMAGIC:
 246         if (N_DATADDR(e, target_page_size) + e.a_data > max_sz)
 247             goto fail;
 248         lseek(fd, N_TXTOFF(e), SEEK_SET);
 249         size = read_targphys(filename, fd, addr, e.a_text);
 250         if (size < 0)
 251             goto fail;
 252         ret = read_targphys(filename, fd, addr + N_DATADDR(e, target_page_size),
 253                             e.a_data);
 254         if (ret < 0)
 255             goto fail;
 256         size += ret;
 257         break;
 258     default:
 259         goto fail;
 260     }
 261     close(fd);
 262     return size;
 263  fail:
 264     close(fd);
 265     return -1;
 266 }
 267
 268 /* ELF loader */
 269
 270 static void *load_at(int fd, int offset, int size)
 271 {
 272     void *ptr;
 273     if (lseek(fd, offset, SEEK_SET) < 0)
 274         return NULL;
 275     ptr = g_malloc(size);
 276     if (read(fd, ptr, size) != size) {
 277         g_free(ptr);
 278         return NULL;
 279     }
 280     return ptr;
 281 }
 282
 283 #ifdef ELF_CLASS
 284 #undef ELF_CLASS
 285 #endif
 286
 287 #define ELF_CLASS   ELFCLASS32
 288 #include "elf.h"
 289
 290 #define SZ              32
 291 #define elf_word        uint32_t
 292 #define elf_sword        int32_t
 293 #define bswapSZs        bswap32s
 294 #include "hw/elf_ops.h"
 295
 296 #undef elfhdr
 297 #undef elf_phdr
 298 #undef elf_shdr
 299 #undef elf_sym
 300 #undef elf_note
 301 #undef elf_word
 302 #undef elf_sword
 303 #undef bswapSZs
 304 #undef SZ
 305 #define elfhdr          elf64_hdr
 306 #define elf_phdr        elf64_phdr
 307 #define elf_note        elf64_note
 308 #define elf_shdr        elf64_shdr
 309 #define elf_sym         elf64_sym
 310 #define elf_word        uint64_t
 311 #define elf_sword        int64_t
 312 #define bswapSZs        bswap64s
 313 #define SZ              64
 314 #include "hw/elf_ops.h"
 315
 316 const char *load_elf_strerror(int error)
 317 {
 318     switch (error) {
 319     case 0:
 320         return "No error";
 321     case ELF_LOAD_FAILED:
 322         return "Failed to load ELF";
 323     case ELF_LOAD_NOT_ELF:
 324         return "The image is not ELF";
 325     case ELF_LOAD_WRONG_ARCH:
 326         return "The image is from incompatible architecture";
 327     case ELF_LOAD_WRONG_ENDIAN:
 328         return "The image has incorrect endianness";
 329     default:
 330         return "Unknown error";
 331     }
 332 }
 333
 334 /* return < 0 if error, otherwise the number of bytes loaded in memory */
 335 int load_elf(const char *filename, uint64_t (*translate_fn)(void *, uint64_t),
 336              void *translate_opaque, uint64_t *pentry, uint64_t *lowaddr,
 337              uint64_t *highaddr, int big_endian, int elf_machine, int clear_lsb)
 338 {
 339     int fd, data_order, target_data_order, must_swab, ret = ELF_LOAD_FAILED;
 340     uint8_t e_ident[EI_NIDENT];
 341
 342     fd = open(filename, O_RDONLY | O_BINARY);
 343     if (fd < 0) {
 344         perror(filename);
 345         return -1;
 346     }
 347     if (read(fd, e_ident, sizeof(e_ident)) != sizeof(e_ident))
 348         goto fail;
 349     if (e_ident[0] != ELFMAG0 ||
 350         e_ident[1] != ELFMAG1 ||
 351         e_ident[2] != ELFMAG2 ||
 352         e_ident[3] != ELFMAG3) {
 353         ret = ELF_LOAD_NOT_ELF;
 354         goto fail;
 355     }
 356 #ifdef HOST_WORDS_BIGENDIAN
 357     data_order = ELFDATA2MSB;
 358 #else
 359     data_order = ELFDATA2LSB;
 360 #endif
 361     must_swab = data_order != e_ident[EI_DATA];
 362     if (big_endian) {
 363         target_data_order = ELFDATA2MSB;
 364     } else {
 365         target_data_order = ELFDATA2LSB;
 366     }
 367
 368     if (target_data_order != e_ident[EI_DATA]) {
 369         ret = ELF_LOAD_WRONG_ENDIAN;
 370         goto fail;
 371     }
 372
 373     lseek(fd, 0, SEEK_SET);
 374     if (e_ident[EI_CLASS] == ELFCLASS64) {
 375         ret = load_elf64(filename, fd, translate_fn, translate_opaque, must_swab,
 376                          pentry, lowaddr, highaddr, elf_machine, clear_lsb);
 377     } else {
 378         ret = load_elf32(filename, fd, translate_fn, translate_opaque, must_swab,
 379                          pentry, lowaddr, highaddr, elf_machine, clear_lsb);
 380     }
 381
 382  fail:
 383     close(fd);
 384     return ret;
 385 }
 386
 387 static void bswap_uboot_header(uboot_image_header_t *hdr)
 388 {
 389 #ifndef HOST_WORDS_BIGENDIAN
 390     bswap32s(&hdr->ih_magic);
 391     bswap32s(&hdr->ih_hcrc);
 392     bswap32s(&hdr->ih_time);
 393     bswap32s(&hdr->ih_size);
 394     bswap32s(&hdr->ih_load);
 395     bswap32s(&hdr->ih_ep);
 396     bswap32s(&hdr->ih_dcrc);
 397 #endif
 398 }
 399
 400
 401 #define ZALLOC_ALIGNMENT        16
 402
 403 static void *zalloc(void *x, unsigned items, unsigned size)
 404 {
 405     void *p;
 406
 407     size *= items;
 408     size = (size + ZALLOC_ALIGNMENT - 1) & ~(ZALLOC_ALIGNMENT - 1);
 409
 410     p = g_malloc(size);
 411
 412     return (p);
 413 }
 414
 415 static void zfree(void *x, void *addr)
 416 {
 417     g_free(addr);
 418 }
 419
 420
 421 #define HEAD_CRC        2
 422 #define EXTRA_FIELD     4
 423 #define ORIG_NAME       8
 424 #define COMMENT         0x10
 425 #define RESERVED        0xe0
 426
 427 #define DEFLATED        8
 428
 429 /* This is the usual maximum in uboot, so if a uImage overflows this, it would
 430  * overflow on real hardware too. */
 431 #define UBOOT_MAX_GUNZIP_BYTES (64 << 20)
 432
 433 static ssize_t gunzip(void *dst, size_t dstlen, uint8_t *src,
 434                       size_t srclen)
 435 {
 436     z_stream s;
 437     ssize_t dstbytes;
 438     int r, i, flags;
 439
 440     /* skip header */
 441     i = 10;
 442     flags = src[3];
 443     if (src[2] != DEFLATED || (flags & RESERVED) != 0) {
 444         puts ("Error: Bad gzipped data\n");
 445         return -1;
 446     }
 447     if ((flags & EXTRA_FIELD) != 0)
 448         i = 12 + src[10] + (src[11] << 8);
 449     if ((flags & ORIG_NAME) != 0)
 450         while (src[i++] != 0)
 451             ;
 452     if ((flags & COMMENT) != 0)
 453         while (src[i++] != 0)
 454             ;
 455     if ((flags & HEAD_CRC) != 0)
 456         i += 2;
 457     if (i >= srclen) {
 458         puts ("Error: gunzip out of data in header\n");
 459         return -1;
 460     }
 461
 462     s.zalloc = zalloc;
 463     s.zfree = zfree;
 464
 465     r = inflateInit2(&s, -MAX_WBITS);
 466     if (r != Z_OK) {
 467         printf ("Error: inflateInit2() returned %d\n", r);
 468         return (-1);
 469     }
 470     s.next_in = src + i;
 471     s.avail_in = srclen - i;
 472     s.next_out = dst;
 473     s.avail_out = dstlen;
 474     r = inflate(&s, Z_FINISH);
 475     if (r != Z_OK && r != Z_STREAM_END) {
 476         printf ("Error: inflate() returned %d\n", r);
 477         return -1;
 478     }
 479     dstbytes = s.next_out - (unsigned char *) dst;
 480     inflateEnd(&s);
 481
 482     return dstbytes;
 483 }
 484
 485 /* Load a U-Boot image.  */
 486 static int load_uboot_image(const char *filename, hwaddr *ep, hwaddr *loadaddr,
 487                             int *is_linux, uint8_t image_type,
 488                             uint64_t (*translate_fn)(void *, uint64_t),
 489                             void *translate_opaque)
 490 {
 491     int fd;
 492     int size;
 493     hwaddr address;
 494     uboot_image_header_t h;
 495     uboot_image_header_t *hdr = &h;
 496     uint8_t *data = NULL;
 497     int ret = -1;
 498     int do_uncompress = 0;
 499
 500     fd = open(filename, O_RDONLY | O_BINARY);
 501     if (fd < 0)
 502         return -1;
 503
 504     size = read(fd, hdr, sizeof(uboot_image_header_t));
 505     if (size < 0)
 506         goto out;
 507
 508     bswap_uboot_header(hdr);
 509
 510     if (hdr->ih_magic != IH_MAGIC)
 511         goto out;
 512
 513     if (hdr->ih_type != image_type) {
 514         fprintf(stderr, "Wrong image type %d, expected %d\n", hdr->ih_type,
 515                 image_type);
 516         goto out;
 517     }
 518
 519     /* TODO: Implement other image types.  */
 520     switch (hdr->ih_type) {
 521     case IH_TYPE_KERNEL:
 522         address = hdr->ih_load;
 523         if (translate_fn) {
 524             address = translate_fn(translate_opaque, address);
 525         }
 526         if (loadaddr) {
 527             *loadaddr = hdr->ih_load;
 528         }
 529
 530         switch (hdr->ih_comp) {
 531         case IH_COMP_NONE:
 532             break;
 533         case IH_COMP_GZIP:
 534             do_uncompress = 1;
 535             break;
 536         default:
 537             fprintf(stderr,
 538                     "Unable to load u-boot images with compression type %d\n",
 539                     hdr->ih_comp);
 540             goto out;
 541         }
 542
 543         if (ep) {
 544             *ep = hdr->ih_ep;
 545         }
 546
 547         /* TODO: Check CPU type.  */
 548         if (is_linux) {
 549             if (hdr->ih_os == IH_OS_LINUX) {
 550                 *is_linux = 1;
 551             } else {
 552                 *is_linux = 0;
 553             }
 554         }
 555
 556         break;
 557     case IH_TYPE_RAMDISK:
 558         address = *loadaddr;
 559         break;
 560     default:
 561         fprintf(stderr, "Unsupported u-boot image type %d\n", hdr->ih_type);
 562         goto out;
 563     }
 564
 565     data = g_malloc(hdr->ih_size);
 566
 567     if (read(fd, data, hdr->ih_size) != hdr->ih_size) {
 568         fprintf(stderr, "Error reading file\n");
 569         goto out;
 570     }
 571
 572     if (do_uncompress) {
 573         uint8_t *compressed_data;
 574         size_t max_bytes;
 575         ssize_t bytes;
 576
 577         compressed_data = data;
 578         max_bytes = UBOOT_MAX_GUNZIP_BYTES;
 579         data = g_malloc(max_bytes);
 580
 581         bytes = gunzip(data, max_bytes, compressed_data, hdr->ih_size);
 582         g_free(compressed_data);
 583         if (bytes < 0) {
 584             fprintf(stderr, "Unable to decompress gzipped image!\n");
 585             goto out;
 586         }
 587         hdr->ih_size = bytes;
 588     }
 589
 590     rom_add_blob_fixed(filename, data, hdr->ih_size, address);
 591
 592     ret = hdr->ih_size;
 593
 594 out:
 595     if (data)
 596         g_free(data);
 597     close(fd);
 598     return ret;
 599 }
 600
 601 int load_uimage(const char *filename, hwaddr *ep, hwaddr *loadaddr,
 602                 int *is_linux,
 603                 uint64_t (*translate_fn)(void *, uint64_t),
 604                 void *translate_opaque)
 605 {
 606     return load_uboot_image(filename, ep, loadaddr, is_linux, IH_TYPE_KERNEL,
 607                             translate_fn, translate_opaque);
 608 }
 609
 610 /* Load a ramdisk.  */
 611 int load_ramdisk(const char *filename, hwaddr addr, uint64_t max_sz)
 612 {
 613     return load_uboot_image(filename, NULL, &addr, NULL, IH_TYPE_RAMDISK,
 614                             NULL, NULL);
 615 }
 616
 617 /* This simply prevents g_malloc in the function below from allocating
 618  * a huge amount of memory, by placing a limit on the maximum
 619  * uncompressed image size that load_image_gzipped will read.
 620  */
 621 #define LOAD_IMAGE_MAX_GUNZIP_BYTES (256 << 20)
 622
 623 /* Load a gzip-compressed kernel. */
 624 int load_image_gzipped(const char *filename, hwaddr addr, uint64_t max_sz)
 625 {
 626     uint8_t *compressed_data = NULL;
 627     uint8_t *data = NULL;
 628     gsize len;
 629     ssize_t bytes;
 630     int ret = -1;
 631
 632     if (!g_file_get_contents(filename, (char **) &compressed_data, &len,
 633                              NULL)) {
 634         goto out;
 635     }
 636
 637     /* Is it a gzip-compressed file? */
 638     if (len < 2 ||
 639         compressed_data[0] != 0x1f ||
 640         compressed_data[1] != 0x8b) {
 641         goto out;
 642     }
 643
 644     if (max_sz > LOAD_IMAGE_MAX_GUNZIP_BYTES) {
 645         max_sz = LOAD_IMAGE_MAX_GUNZIP_BYTES;
 646     }
 647
 648     data = g_malloc(max_sz);
 649     bytes = gunzip(data, max_sz, compressed_data, len);
 650     if (bytes < 0) {
 651         fprintf(stderr, "%s: unable to decompress gzipped kernel file\n",
 652                 filename);
 653         goto out;
 654     }
 655
 656     rom_add_blob_fixed(filename, data, bytes, addr);
 657     ret = bytes;
 658
 659  out:
 660     g_free(compressed_data);
 661     g_free(data);
 662     return ret;
 663 }
 664
 665 /*
 666  * Functions for reboot-persistent memory regions.
 667  *  - used for vga bios and option roms.
 668  *  - also linux kernel (-kernel / -initrd).
 669  */
 670
 671 typedef struct Rom Rom;
 672
 673 struct Rom {
 674     char *name;
 675     char *path;
 676
 677     /* datasize is the amount of memory allocated in "data". If datasize is less
 678      * than romsize, it means that the area from datasize to romsize is filled
 679      * with zeros.
 680      */
 681     size_t romsize;
 682     size_t datasize;
 683
 684     uint8_t *data;
 685     MemoryRegion *mr;
 686     int isrom;
 687     char *fw_dir;
 688     char *fw_file;
 689
 690     hwaddr addr;
 691     QTAILQ_ENTRY(Rom) next;
 692 };
 693
 694 static FWCfgState *fw_cfg;
 695 static QTAILQ_HEAD(, Rom) roms = QTAILQ_HEAD_INITIALIZER(roms);
 696
 697 static void rom_insert(Rom *rom)
 698 {
 699     Rom *item;
 700
 701     if (roms_loaded) {
 702         hw_error ("ROM images must be loaded at startup\n");
 703     }
 704
 705     /* list is ordered by load address */
 706     QTAILQ_FOREACH(item, &roms, next) {
 707         if (rom->addr >= item->addr)
 708             continue;
 709         QTAILQ_INSERT_BEFORE(item, rom, next);
 710         return;
 711     }
 712     QTAILQ_INSERT_TAIL(&roms, rom, next);
 713 }
 714
 715 static void fw_cfg_resized(const char *id, uint64_t length, void *host)
 716 {
 717     if (fw_cfg) {
 718         fw_cfg_modify_file(fw_cfg, id + strlen("/rom@"), host, length);
 719     }
 720 }
 721
 722 static void *rom_set_mr(Rom *rom, Object *owner, const char *name)
 723 {
 724     void *data;
 725
 726     rom->mr = g_malloc(sizeof(*rom->mr));
 727     memory_region_init_resizeable_ram(rom->mr, owner, name,
 728                                       rom->datasize, rom->romsize,
 729                                       fw_cfg_resized,
 730                                       &error_abort);
 731     memory_region_set_readonly(rom->mr, true);
 732     vmstate_register_ram_global(rom->mr);
 733
 734     data = memory_region_get_ram_ptr(rom->mr);
 735     memcpy(data, rom->data, rom->datasize);
 736
 737     return data;
 738 }
 739
 740 int rom_add_file(const char *file, const char *fw_dir,
 741                  hwaddr addr, int32_t bootindex,
 742                  bool option_rom)
 743 {
 744     Rom *rom;
 745     int rc, fd = -1;
 746     char devpath[100];
 747
 748     rom = g_malloc0(sizeof(*rom));
 749     rom->name = g_strdup(file);
 750     rom->path = qemu_find_file(QEMU_FILE_TYPE_BIOS, rom->name);
 751     if (rom->path == NULL) {
 752         rom->path = g_strdup(file);
 753     }
 754
 755     fd = open(rom->path, O_RDONLY | O_BINARY);
 756     if (fd == -1) {
 757         fprintf(stderr, "Could not open option rom '%s': %s\n",
 758                 rom->path, strerror(errno));
 759         goto err;
 760     }
 761
 762     if (fw_dir) {
 763         rom->fw_dir  = g_strdup(fw_dir);
 764         rom->fw_file = g_strdup(file);
 765     }
 766     rom->addr     = addr;
 767     rom->romsize  = lseek(fd, 0, SEEK_END);
 768     if (rom->romsize == -1) {
 769         fprintf(stderr, "rom: file %-20s: get size error: %s\n",
 770                 rom->name, strerror(errno));
 771         goto err;
 772     }
 773
 774     rom->datasize = rom->romsize;
 775     rom->data     = g_malloc0(rom->datasize);
 776     lseek(fd, 0, SEEK_SET);
 777     rc = read(fd, rom->data, rom->datasize);
 778     if (rc != rom->datasize) {
 779         fprintf(stderr, "rom: file %-20s: read error: rc=%d (expected %zd)\n",
 780                 rom->name, rc, rom->datasize);
 781         goto err;
 782     }
 783     close(fd);
 784     rom_insert(rom);
 785     if (rom->fw_file && fw_cfg) {
 786         const char *basename;
 787         char fw_file_name[FW_CFG_MAX_FILE_PATH];
 788         void *data;
 789
 790         basename = strrchr(rom->fw_file, '/');
 791         if (basename) {
 792             basename++;
 793         } else {
 794             basename = rom->fw_file;
 795         }
 796         snprintf(fw_file_name, sizeof(fw_file_name), "%s/%s", rom->fw_dir,
 797                  basename);
 798         snprintf(devpath, sizeof(devpath), "/rom@%s", fw_file_name);
 799
 800         if ((!option_rom || option_rom_has_mr) && rom_file_has_mr) {
 801             data = rom_set_mr(rom, OBJECT(fw_cfg), devpath);
 802         } else {
 803             data = rom->data;
 804         }
 805
 806         fw_cfg_add_file(fw_cfg, fw_file_name, data, rom->romsize);
 807     } else {
 808         snprintf(devpath, sizeof(devpath), "/rom@" TARGET_FMT_plx, addr);
 809     }
 810
 811     add_boot_device_path(bootindex, NULL, devpath);
 812     return 0;
 813
 814 err:
 815     if (fd != -1)
 816         close(fd);
 817     g_free(rom->data);
 818     g_free(rom->path);
 819     g_free(rom->name);
 820     g_free(rom);
 821     return -1;
 822 }
 823
 824 ram_addr_t rom_add_blob(const char *name, const void *blob, size_t len,
 825                    size_t max_len, hwaddr addr, const char *fw_file_name,
 826                    FWCfgReadCallback fw_callback, void *callback_opaque)
 827 {
 828     Rom *rom;
 829     ram_addr_t ret = RAM_ADDR_MAX;
 830
 831     rom           = g_malloc0(sizeof(*rom));
 832     rom->name     = g_strdup(name);
 833     rom->addr     = addr;
 834     rom->romsize  = max_len ? max_len : len;
 835     rom->datasize = len;
 836     rom->data     = g_malloc0(rom->datasize);
 837     memcpy(rom->data, blob, len);
 838     rom_insert(rom);
 839     if (fw_file_name && fw_cfg) {
 840         char devpath[100];
 841         void *data;
 842
 843         snprintf(devpath, sizeof(devpath), "/rom@%s", fw_file_name);
 844
 845         if (rom_file_has_mr) {
 846             data = rom_set_mr(rom, OBJECT(fw_cfg), devpath);
 847             ret = memory_region_get_ram_addr(rom->mr);
 848         } else {
 849             data = rom->data;
 850         }
 851
 852         fw_cfg_add_file_callback(fw_cfg, fw_file_name,
 853                                  fw_callback, callback_opaque,
 854                                  data, rom->datasize);
 855     }
 856     return ret;
 857 }
 858
 859 /* This function is specific for elf program because we don't need to allocate
 860  * all the rom. We just allocate the first part and the rest is just zeros. This
 861  * is why romsize and datasize are different. Also, this function seize the
 862  * memory ownership of "data", so we don't have to allocate and copy the buffer.
 863  */
 864 int rom_add_elf_program(const char *name, void *data, size_t datasize,
 865                         size_t romsize, hwaddr addr)
 866 {
 867     Rom *rom;
 868
 869     rom           = g_malloc0(sizeof(*rom));
 870     rom->name     = g_strdup(name);
 871     rom->addr     = addr;
 872     rom->datasize = datasize;
 873     rom->romsize  = romsize;
 874     rom->data     = data;
 875     rom_insert(rom);
 876     return 0;
 877 }
 878
 879 int rom_add_vga(const char *file)
 880 {
 881     return rom_add_file(file, "vgaroms", 0, -1, true);
 882 }
 883
 884 int rom_add_option(const char *file, int32_t bootindex)
 885 {
 886     return rom_add_file(file, "genroms", 0, bootindex, true);
 887 }
 888
 889 static void rom_reset(void *unused)
 890 {
 891     Rom *rom;
 892
 893     QTAILQ_FOREACH(rom, &roms, next) {
 894         if (rom->fw_file) {
 895             continue;
 896         }
 897         if (rom->data == NULL) {
 898             continue;
 899         }
 900         if (rom->mr) {
 901             void *host = memory_region_get_ram_ptr(rom->mr);
 902             memcpy(host, rom->data, rom->datasize);
 903         } else {
 904             cpu_physical_memory_write_rom(&address_space_memory,
 905                                           rom->addr, rom->data, rom->datasize);
 906         }
 907         if (rom->isrom) {
 908             /* rom needs to be written only once */
 909             g_free(rom->data);
 910             rom->data = NULL;
 911         }
 912         /*
 913          * The rom loader is really on the same level as firmware in the guest
 914          * shadowing a ROM into RAM. Such a shadowing mechanism needs to ensure
 915          * that the instruction cache for that new region is clear, so that the
 916          * CPU definitely fetches its instructions from the just written data.
 917          */
 918         cpu_flush_icache_range(rom->addr, rom->datasize);
 919     }
 920 }
 921
 922 int rom_load_all(void)
 923 {
 924     hwaddr addr = 0;
 925     MemoryRegionSection section;
 926     Rom *rom;
 927
 928     QTAILQ_FOREACH(rom, &roms, next) {
 929         if (rom->fw_file) {
 930             continue;
 931         }
 932         if (addr > rom->addr) {
 933             fprintf(stderr, "rom: requested regions overlap "
 934                     "(rom %s. free=0x" TARGET_FMT_plx
 935                     ", addr=0x" TARGET_FMT_plx ")\n",
 936                     rom->name, addr, rom->addr);
 937             return -1;
 938         }
 939         addr  = rom->addr;
 940         addr += rom->romsize;
 941         section = memory_region_find(get_system_memory(), rom->addr, 1);
 942         rom->isrom = int128_nz(section.size) && memory_region_is_rom(section.mr);
 943         memory_region_unref(section.mr);
 944     }
 945     qemu_register_reset(rom_reset, NULL);
 946     return 0;
 947 }
 948
 949 void rom_load_done(void)
 950 {
 951     roms_loaded = 1;
 952 }
 953
 954 void rom_set_fw(FWCfgState *f)
 955 {
 956     fw_cfg = f;
 957 }
 958
 959 static Rom *find_rom(hwaddr addr)
 960 {
 961     Rom *rom;
 962
 963     QTAILQ_FOREACH(rom, &roms, next) {
 964         if (rom->fw_file) {
 965             continue;
 966         }
 967         if (rom->mr) {
 968             continue;
 969         }
 970         if (rom->addr > addr) {
 971             continue;
 972         }
 973         if (rom->addr + rom->romsize < addr) {
 974             continue;
 975         }
 976         return rom;
 977     }
 978     return NULL;
 979 }
 980
 981 /*
 982  * Copies memory from registered ROMs to dest. Any memory that is contained in
 983  * a ROM between addr and addr + size is copied. Note that this can involve
 984  * multiple ROMs, which need not start at addr and need not end at addr + size.
 985  */
 986 int rom_copy(uint8_t *dest, hwaddr addr, size_t size)
 987 {
 988     hwaddr end = addr + size;
 989     uint8_t *s, *d = dest;
 990     size_t l = 0;
 991     Rom *rom;
 992
 993     QTAILQ_FOREACH(rom, &roms, next) {
 994         if (rom->fw_file) {
 995             continue;
 996         }
 997         if (rom->mr) {
 998             continue;
 999         }
1000         if (rom->addr + rom->romsize < addr) {
1001             continue;
1002         }
1003         if (rom->addr > end) {
1004             break;
1005         }
1006
1007         d = dest + (rom->addr - addr);
1008         s = rom->data;
1009         l = rom->datasize;
1010
1011         if ((d + l) > (dest + size)) {
1012             l = dest - d;
1013         }
1014
1015         if (l > 0) {
1016             memcpy(d, s, l);
1017         }
1018
1019         if (rom->romsize > rom->datasize) {
1020             /* If datasize is less than romsize, it means that we didn't
1021              * allocate all the ROM because the trailing data are only zeros.
1022              */
1023
1024             d += l;
1025             l = rom->romsize - rom->datasize;
1026
1027             if ((d + l) > (dest + size)) {
1028                 /* Rom size doesn't fit in the destination area. Adjust to avoid
1029                  * overflow.
1030                  */
1031                 l = dest - d;
1032             }
1033
1034             if (l > 0) {
1035                 memset(d, 0x0, l);
1036             }
1037         }
1038     }
1039
1040     return (d + l) - dest;
1041 }
1042
1043 void *rom_ptr(hwaddr addr)
1044 {
1045     Rom *rom;
1046
1047     rom = find_rom(addr);
1048     if (!rom || !rom->data)
1049         return NULL;
1050     return rom->data + (addr - rom->addr);
1051 }
1052
1053 void do_info_roms(Monitor *mon, const QDict *qdict)
1054 {
1055     Rom *rom;
1056
1057     QTAILQ_FOREACH(rom, &roms, next) {
1058         if (rom->mr) {
1059             monitor_printf(mon, "%s"
1060                            " size=0x%06zx name=\"%s\"\n",
1061                            memory_region_name(rom->mr),
1062                            rom->romsize,
1063                            rom->name);
1064         } else if (!rom->fw_file) {
1065             monitor_printf(mon, "addr=" TARGET_FMT_plx
1066                            " size=0x%06zx mem=%s name=\"%s\"\n",
1067                            rom->addr, rom->romsize,
1068                            rom->isrom ? "rom" : "ram",
1069                            rom->name);
1070         } else {
1071             monitor_printf(mon, "fw=%s/%s"
1072                            " size=0x%06zx name=\"%s\"\n",
1073                            rom->fw_dir,
1074                            rom->fw_file,
1075                            rom->romsize,
1076                            rom->name);
1077         }
1078     }
1079 }