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