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_in_ram = 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 /* return < 0 if error, otherwise the number of bytes loaded in memory */
 288 int load_elf(const char *filename, uint64_t (*translate_fn)(void *, uint64_t),
 289              void *translate_opaque, uint64_t *pentry, uint64_t *lowaddr,
 290              uint64_t *highaddr, int big_endian, int elf_machine, int clear_lsb)
 291 {
 292     int fd, data_order, target_data_order, must_swab, ret;
 293     uint8_t e_ident[EI_NIDENT];
 294
 295     fd = open(filename, O_RDONLY | O_BINARY);
 296     if (fd < 0) {
 297         perror(filename);
 298         return -1;
 299     }
 300     if (read(fd, e_ident, sizeof(e_ident)) != sizeof(e_ident))
 301         goto fail;
 302     if (e_ident[0] != ELFMAG0 ||
 303         e_ident[1] != ELFMAG1 ||
 304         e_ident[2] != ELFMAG2 ||
 305         e_ident[3] != ELFMAG3)
 306         goto fail;
 307 #ifdef HOST_WORDS_BIGENDIAN
 308     data_order = ELFDATA2MSB;
 309 #else
 310     data_order = ELFDATA2LSB;
 311 #endif
 312     must_swab = data_order != e_ident[EI_DATA];
 313     if (big_endian) {
 314         target_data_order = ELFDATA2MSB;
 315     } else {
 316         target_data_order = ELFDATA2LSB;
 317     }
 318
 319     if (target_data_order != e_ident[EI_DATA]) {
 320         goto fail;
 321     }
 322
 323     lseek(fd, 0, SEEK_SET);
 324     if (e_ident[EI_CLASS] == ELFCLASS64) {
 325         ret = load_elf64(filename, fd, translate_fn, translate_opaque, must_swab,
 326                          pentry, lowaddr, highaddr, elf_machine, clear_lsb);
 327     } else {
 328         ret = load_elf32(filename, fd, translate_fn, translate_opaque, must_swab,
 329                          pentry, lowaddr, highaddr, elf_machine, clear_lsb);
 330     }
 331
 332     close(fd);
 333     return ret;
 334
 335  fail:
 336     close(fd);
 337     return -1;
 338 }
 339
 340 static void bswap_uboot_header(uboot_image_header_t *hdr)
 341 {
 342 #ifndef HOST_WORDS_BIGENDIAN
 343     bswap32s(&hdr->ih_magic);
 344     bswap32s(&hdr->ih_hcrc);
 345     bswap32s(&hdr->ih_time);
 346     bswap32s(&hdr->ih_size);
 347     bswap32s(&hdr->ih_load);
 348     bswap32s(&hdr->ih_ep);
 349     bswap32s(&hdr->ih_dcrc);
 350 #endif
 351 }
 352
 353
 354 #define ZALLOC_ALIGNMENT        16
 355
 356 static void *zalloc(void *x, unsigned items, unsigned size)
 357 {
 358     void *p;
 359
 360     size *= items;
 361     size = (size + ZALLOC_ALIGNMENT - 1) & ~(ZALLOC_ALIGNMENT - 1);
 362
 363     p = g_malloc(size);
 364
 365     return (p);
 366 }
 367
 368 static void zfree(void *x, void *addr)
 369 {
 370     g_free(addr);
 371 }
 372
 373
 374 #define HEAD_CRC        2
 375 #define EXTRA_FIELD     4
 376 #define ORIG_NAME       8
 377 #define COMMENT         0x10
 378 #define RESERVED        0xe0
 379
 380 #define DEFLATED        8
 381
 382 /* This is the usual maximum in uboot, so if a uImage overflows this, it would
 383  * overflow on real hardware too. */
 384 #define UBOOT_MAX_GUNZIP_BYTES (64 << 20)
 385
 386 static ssize_t gunzip(void *dst, size_t dstlen, uint8_t *src,
 387                       size_t srclen)
 388 {
 389     z_stream s;
 390     ssize_t dstbytes;
 391     int r, i, flags;
 392
 393     /* skip header */
 394     i = 10;
 395     flags = src[3];
 396     if (src[2] != DEFLATED || (flags & RESERVED) != 0) {
 397         puts ("Error: Bad gzipped data\n");
 398         return -1;
 399     }
 400     if ((flags & EXTRA_FIELD) != 0)
 401         i = 12 + src[10] + (src[11] << 8);
 402     if ((flags & ORIG_NAME) != 0)
 403         while (src[i++] != 0)
 404             ;
 405     if ((flags & COMMENT) != 0)
 406         while (src[i++] != 0)
 407             ;
 408     if ((flags & HEAD_CRC) != 0)
 409         i += 2;
 410     if (i >= srclen) {
 411         puts ("Error: gunzip out of data in header\n");
 412         return -1;
 413     }
 414
 415     s.zalloc = zalloc;
 416     s.zfree = zfree;
 417
 418     r = inflateInit2(&s, -MAX_WBITS);
 419     if (r != Z_OK) {
 420         printf ("Error: inflateInit2() returned %d\n", r);
 421         return (-1);
 422     }
 423     s.next_in = src + i;
 424     s.avail_in = srclen - i;
 425     s.next_out = dst;
 426     s.avail_out = dstlen;
 427     r = inflate(&s, Z_FINISH);
 428     if (r != Z_OK && r != Z_STREAM_END) {
 429         printf ("Error: inflate() returned %d\n", r);
 430         return -1;
 431     }
 432     dstbytes = s.next_out - (unsigned char *) dst;
 433     inflateEnd(&s);
 434
 435     return dstbytes;
 436 }
 437
 438 /* Load a U-Boot image.  */
 439 static int load_uboot_image(const char *filename, hwaddr *ep, hwaddr *loadaddr,
 440                             int *is_linux, uint8_t image_type)
 441 {
 442     int fd;
 443     int size;
 444     hwaddr address;
 445     uboot_image_header_t h;
 446     uboot_image_header_t *hdr = &h;
 447     uint8_t *data = NULL;
 448     int ret = -1;
 449     int do_uncompress = 0;
 450
 451     fd = open(filename, O_RDONLY | O_BINARY);
 452     if (fd < 0)
 453         return -1;
 454
 455     size = read(fd, hdr, sizeof(uboot_image_header_t));
 456     if (size < 0)
 457         goto out;
 458
 459     bswap_uboot_header(hdr);
 460
 461     if (hdr->ih_magic != IH_MAGIC)
 462         goto out;
 463
 464     if (hdr->ih_type != image_type) {
 465         fprintf(stderr, "Wrong image type %d, expected %d\n", hdr->ih_type,
 466                 image_type);
 467         goto out;
 468     }
 469
 470     /* TODO: Implement other image types.  */
 471     switch (hdr->ih_type) {
 472     case IH_TYPE_KERNEL:
 473         address = hdr->ih_load;
 474         if (loadaddr) {
 475             *loadaddr = hdr->ih_load;
 476         }
 477
 478         switch (hdr->ih_comp) {
 479         case IH_COMP_NONE:
 480             break;
 481         case IH_COMP_GZIP:
 482             do_uncompress = 1;
 483             break;
 484         default:
 485             fprintf(stderr,
 486                     "Unable to load u-boot images with compression type %d\n",
 487                     hdr->ih_comp);
 488             goto out;
 489         }
 490
 491         if (ep) {
 492             *ep = hdr->ih_ep;
 493         }
 494
 495         /* TODO: Check CPU type.  */
 496         if (is_linux) {
 497             if (hdr->ih_os == IH_OS_LINUX) {
 498                 *is_linux = 1;
 499             } else {
 500                 *is_linux = 0;
 501             }
 502         }
 503
 504         break;
 505     case IH_TYPE_RAMDISK:
 506         address = *loadaddr;
 507         break;
 508     default:
 509         fprintf(stderr, "Unsupported u-boot image type %d\n", hdr->ih_type);
 510         goto out;
 511     }
 512
 513     data = g_malloc(hdr->ih_size);
 514
 515     if (read(fd, data, hdr->ih_size) != hdr->ih_size) {
 516         fprintf(stderr, "Error reading file\n");
 517         goto out;
 518     }
 519
 520     if (do_uncompress) {
 521         uint8_t *compressed_data;
 522         size_t max_bytes;
 523         ssize_t bytes;
 524
 525         compressed_data = data;
 526         max_bytes = UBOOT_MAX_GUNZIP_BYTES;
 527         data = g_malloc(max_bytes);
 528
 529         bytes = gunzip(data, max_bytes, compressed_data, hdr->ih_size);
 530         g_free(compressed_data);
 531         if (bytes < 0) {
 532             fprintf(stderr, "Unable to decompress gzipped image!\n");
 533             goto out;
 534         }
 535         hdr->ih_size = bytes;
 536     }
 537
 538     rom_add_blob_fixed(filename, data, hdr->ih_size, address);
 539
 540     ret = hdr->ih_size;
 541
 542 out:
 543     if (data)
 544         g_free(data);
 545     close(fd);
 546     return ret;
 547 }
 548
 549 int load_uimage(const char *filename, hwaddr *ep, hwaddr *loadaddr,
 550                 int *is_linux)
 551 {
 552     return load_uboot_image(filename, ep, loadaddr, is_linux, IH_TYPE_KERNEL);
 553 }
 554
 555 /* Load a ramdisk.  */
 556 int load_ramdisk(const char *filename, hwaddr addr, uint64_t max_sz)
 557 {
 558     return load_uboot_image(filename, NULL, &addr, NULL, IH_TYPE_RAMDISK);
 559 }
 560
 561 /*
 562  * Functions for reboot-persistent memory regions.
 563  *  - used for vga bios and option roms.
 564  *  - also linux kernel (-kernel / -initrd).
 565  */
 566
 567 typedef struct Rom Rom;
 568
 569 struct Rom {
 570     char *name;
 571     char *path;
 572
 573     /* datasize is the amount of memory allocated in "data". If datasize is less
 574      * than romsize, it means that the area from datasize to romsize is filled
 575      * with zeros.
 576      */
 577     size_t romsize;
 578     size_t datasize;
 579
 580     uint8_t *data;
 581     MemoryRegion *mr;
 582     int isrom;
 583     char *fw_dir;
 584     char *fw_file;
 585
 586     hwaddr addr;
 587     QTAILQ_ENTRY(Rom) next;
 588 };
 589
 590 static FWCfgState *fw_cfg;
 591 static QTAILQ_HEAD(, Rom) roms = QTAILQ_HEAD_INITIALIZER(roms);
 592
 593 static void rom_insert(Rom *rom)
 594 {
 595     Rom *item;
 596
 597     if (roms_loaded) {
 598         hw_error ("ROM images must be loaded at startup\n");
 599     }
 600
 601     /* list is ordered by load address */
 602     QTAILQ_FOREACH(item, &roms, next) {
 603         if (rom->addr >= item->addr)
 604             continue;
 605         QTAILQ_INSERT_BEFORE(item, rom, next);
 606         return;
 607     }
 608     QTAILQ_INSERT_TAIL(&roms, rom, next);
 609 }
 610
 611 static void *rom_set_mr(Rom *rom, Object *owner, const char *name)
 612 {
 613     void *data;
 614
 615     rom->mr = g_malloc(sizeof(*rom->mr));
 616     memory_region_init_ram(rom->mr, owner, name, rom->datasize);
 617     memory_region_set_readonly(rom->mr, true);
 618     vmstate_register_ram_global(rom->mr);
 619
 620     data = memory_region_get_ram_ptr(rom->mr);
 621     memcpy(data, rom->data, rom->datasize);
 622
 623     return data;
 624 }
 625
 626 int rom_add_file(const char *file, const char *fw_dir,
 627                  hwaddr addr, int32_t bootindex)
 628 {
 629     Rom *rom;
 630     int rc, fd = -1;
 631     char devpath[100];
 632
 633     rom = g_malloc0(sizeof(*rom));
 634     rom->name = g_strdup(file);
 635     rom->path = qemu_find_file(QEMU_FILE_TYPE_BIOS, rom->name);
 636     if (rom->path == NULL) {
 637         rom->path = g_strdup(file);
 638     }
 639
 640     fd = open(rom->path, O_RDONLY | O_BINARY);
 641     if (fd == -1) {
 642         fprintf(stderr, "Could not open option rom '%s': %s\n",
 643                 rom->path, strerror(errno));
 644         goto err;
 645     }
 646
 647     if (fw_dir) {
 648         rom->fw_dir  = g_strdup(fw_dir);
 649         rom->fw_file = g_strdup(file);
 650     }
 651     rom->addr     = addr;
 652     rom->romsize  = lseek(fd, 0, SEEK_END);
 653     rom->datasize = rom->romsize;
 654     rom->data     = g_malloc0(rom->datasize);
 655     lseek(fd, 0, SEEK_SET);
 656     rc = read(fd, rom->data, rom->datasize);
 657     if (rc != rom->datasize) {
 658         fprintf(stderr, "rom: file %-20s: read error: rc=%d (expected %zd)\n",
 659                 rom->name, rc, rom->datasize);
 660         goto err;
 661     }
 662     close(fd);
 663     rom_insert(rom);
 664     if (rom->fw_file && fw_cfg) {
 665         const char *basename;
 666         char fw_file_name[FW_CFG_MAX_FILE_PATH];
 667         void *data;
 668
 669         basename = strrchr(rom->fw_file, '/');
 670         if (basename) {
 671             basename++;
 672         } else {
 673             basename = rom->fw_file;
 674         }
 675         snprintf(fw_file_name, sizeof(fw_file_name), "%s/%s", rom->fw_dir,
 676                  basename);
 677         snprintf(devpath, sizeof(devpath), "/rom@%s", fw_file_name);
 678
 679         if (rom_file_in_ram) {
 680             data = rom_set_mr(rom, OBJECT(fw_cfg), devpath);
 681         } else {
 682             data = rom->data;
 683         }
 684
 685         fw_cfg_add_file(fw_cfg, fw_file_name, data, rom->romsize);
 686     } else {
 687         snprintf(devpath, sizeof(devpath), "/rom@" TARGET_FMT_plx, addr);
 688     }
 689
 690     add_boot_device_path(bootindex, NULL, devpath);
 691     return 0;
 692
 693 err:
 694     if (fd != -1)
 695         close(fd);
 696     g_free(rom->data);
 697     g_free(rom->path);
 698     g_free(rom->name);
 699     g_free(rom);
 700     return -1;
 701 }
 702
 703 void *rom_add_blob(const char *name, const void *blob, size_t len,
 704                    hwaddr addr, const char *fw_file_name,
 705                    FWCfgReadCallback fw_callback, void *callback_opaque)
 706 {
 707     Rom *rom;
 708     void *data = NULL;
 709
 710     rom           = g_malloc0(sizeof(*rom));
 711     rom->name     = g_strdup(name);
 712     rom->addr     = addr;
 713     rom->romsize  = len;
 714     rom->datasize = len;
 715     rom->data     = g_malloc0(rom->datasize);
 716     memcpy(rom->data, blob, len);
 717     rom_insert(rom);
 718     if (fw_file_name && fw_cfg) {
 719         char devpath[100];
 720
 721         snprintf(devpath, sizeof(devpath), "/rom@%s", fw_file_name);
 722
 723         if (rom_file_in_ram) {
 724             data = rom_set_mr(rom, OBJECT(fw_cfg), devpath);
 725         } else {
 726             data = rom->data;
 727         }
 728
 729         fw_cfg_add_file_callback(fw_cfg, fw_file_name,
 730                                  fw_callback, callback_opaque,
 731                                  data, rom->romsize);
 732     }
 733     return data;
 734 }
 735
 736 /* This function is specific for elf program because we don't need to allocate
 737  * all the rom. We just allocate the first part and the rest is just zeros. This
 738  * is why romsize and datasize are different. Also, this function seize the
 739  * memory ownership of "data", so we don't have to allocate and copy the buffer.
 740  */
 741 int rom_add_elf_program(const char *name, void *data, size_t datasize,
 742                         size_t romsize, hwaddr addr)
 743 {
 744     Rom *rom;
 745
 746     rom           = g_malloc0(sizeof(*rom));
 747     rom->name     = g_strdup(name);
 748     rom->addr     = addr;
 749     rom->datasize = datasize;
 750     rom->romsize  = romsize;
 751     rom->data     = data;
 752     rom_insert(rom);
 753     return 0;
 754 }
 755
 756 int rom_add_vga(const char *file)
 757 {
 758     return rom_add_file(file, "vgaroms", 0, -1);
 759 }
 760
 761 int rom_add_option(const char *file, int32_t bootindex)
 762 {
 763     return rom_add_file(file, "genroms", 0, bootindex);
 764 }
 765
 766 static void rom_reset(void *unused)
 767 {
 768     Rom *rom;
 769
 770     QTAILQ_FOREACH(rom, &roms, next) {
 771         if (rom->fw_file) {
 772             continue;
 773         }
 774         if (rom->data == NULL) {
 775             continue;
 776         }
 777         if (rom->mr) {
 778             void *host = memory_region_get_ram_ptr(rom->mr);
 779             memcpy(host, rom->data, rom->datasize);
 780         } else {
 781             cpu_physical_memory_write_rom(rom->addr, rom->data, rom->datasize);
 782         }
 783         if (rom->isrom) {
 784             /* rom needs to be written only once */
 785             g_free(rom->data);
 786             rom->data = NULL;
 787         }
 788         /*
 789          * The rom loader is really on the same level as firmware in the guest
 790          * shadowing a ROM into RAM. Such a shadowing mechanism needs to ensure
 791          * that the instruction cache for that new region is clear, so that the
 792          * CPU definitely fetches its instructions from the just written data.
 793          */
 794         cpu_flush_icache_range(rom->addr, rom->datasize);
 795     }
 796 }
 797
 798 int rom_load_all(void)
 799 {
 800     hwaddr addr = 0;
 801     MemoryRegionSection section;
 802     Rom *rom;
 803
 804     QTAILQ_FOREACH(rom, &roms, next) {
 805         if (rom->fw_file) {
 806             continue;
 807         }
 808         if (addr > rom->addr) {
 809             fprintf(stderr, "rom: requested regions overlap "
 810                     "(rom %s. free=0x" TARGET_FMT_plx
 811                     ", addr=0x" TARGET_FMT_plx ")\n",
 812                     rom->name, addr, rom->addr);
 813             return -1;
 814         }
 815         addr  = rom->addr;
 816         addr += rom->romsize;
 817         section = memory_region_find(get_system_memory(), rom->addr, 1);
 818         rom->isrom = int128_nz(section.size) && memory_region_is_rom(section.mr);
 819         memory_region_unref(section.mr);
 820     }
 821     qemu_register_reset(rom_reset, NULL);
 822     return 0;
 823 }
 824
 825 void rom_load_done(void)
 826 {
 827     roms_loaded = 1;
 828 }
 829
 830 void rom_set_fw(FWCfgState *f)
 831 {
 832     fw_cfg = f;
 833 }
 834
 835 static Rom *find_rom(hwaddr addr)
 836 {
 837     Rom *rom;
 838
 839     QTAILQ_FOREACH(rom, &roms, next) {
 840         if (rom->fw_file) {
 841             continue;
 842         }
 843         if (rom->mr) {
 844             continue;
 845         }
 846         if (rom->addr > addr) {
 847             continue;
 848         }
 849         if (rom->addr + rom->romsize < addr) {
 850             continue;
 851         }
 852         return rom;
 853     }
 854     return NULL;
 855 }
 856
 857 /*
 858  * Copies memory from registered ROMs to dest. Any memory that is contained in
 859  * a ROM between addr and addr + size is copied. Note that this can involve
 860  * multiple ROMs, which need not start at addr and need not end at addr + size.
 861  */
 862 int rom_copy(uint8_t *dest, hwaddr addr, size_t size)
 863 {
 864     hwaddr end = addr + size;
 865     uint8_t *s, *d = dest;
 866     size_t l = 0;
 867     Rom *rom;
 868
 869     QTAILQ_FOREACH(rom, &roms, next) {
 870         if (rom->fw_file) {
 871             continue;
 872         }
 873         if (rom->mr) {
 874             continue;
 875         }
 876         if (rom->addr + rom->romsize < addr) {
 877             continue;
 878         }
 879         if (rom->addr > end) {
 880             break;
 881         }
 882
 883         d = dest + (rom->addr - addr);
 884         s = rom->data;
 885         l = rom->datasize;
 886
 887         if ((d + l) > (dest + size)) {
 888             l = dest - d;
 889         }
 890
 891         if (l > 0) {
 892             memcpy(d, s, l);
 893         }
 894
 895         if (rom->romsize > rom->datasize) {
 896             /* If datasize is less than romsize, it means that we didn't
 897              * allocate all the ROM because the trailing data are only zeros.
 898              */
 899
 900             d += l;
 901             l = rom->romsize - rom->datasize;
 902
 903             if ((d + l) > (dest + size)) {
 904                 /* Rom size doesn't fit in the destination area. Adjust to avoid
 905                  * overflow.
 906                  */
 907                 l = dest - d;
 908             }
 909
 910             if (l > 0) {
 911                 memset(d, 0x0, l);
 912             }
 913         }
 914     }
 915
 916     return (d + l) - dest;
 917 }
 918
 919 void *rom_ptr(hwaddr addr)
 920 {
 921     Rom *rom;
 922
 923     rom = find_rom(addr);
 924     if (!rom || !rom->data)
 925         return NULL;
 926     return rom->data + (addr - rom->addr);
 927 }
 928
 929 void do_info_roms(Monitor *mon, const QDict *qdict)
 930 {
 931     Rom *rom;
 932
 933     QTAILQ_FOREACH(rom, &roms, next) {
 934         if (rom->mr) {
 935             monitor_printf(mon, "%s"
 936                            " size=0x%06zx name=\"%s\"\n",
 937                            rom->mr->name,
 938                            rom->romsize,
 939                            rom->name);
 940         } else if (!rom->fw_file) {
 941             monitor_printf(mon, "addr=" TARGET_FMT_plx
 942                            " size=0x%06zx mem=%s name=\"%s\"\n",
 943                            rom->addr, rom->romsize,
 944                            rom->isrom ? "rom" : "ram",
 945                            rom->name);
 946         } else {
 947             monitor_printf(mon, "fw=%s/%s"
 948                            " size=0x%06zx name=\"%s\"\n",
 949                            rom->fw_dir,
 950                            rom->fw_file,
 951                            rom->romsize,
 952                            rom->name);
 953         }
 954     }
 955 }