2 * QEMU Executable loader
4 * Copyright (c) 2006 Fabrice Bellard
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:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
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
24 * Gunzip functionality in this file is derived from u-boot:
26 * (C) Copyright 2008 Semihalf
28 * (C) Copyright 2000-2005
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.
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.
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/>.
48 #include "uboot_image.h"
53 /* return the size or -1 if error */
54 int get_image_size(const char *filename)
57 fd = open(filename, O_RDONLY | O_BINARY);
60 size = lseek(fd, 0, SEEK_END);
65 /* return the size or -1 if error */
66 /* deprecated, because caller does not specify buffer size! */
67 int load_image(const char *filename, uint8_t *addr)
70 fd = open(filename, O_RDONLY | O_BINARY);
73 size = lseek(fd, 0, SEEK_END);
74 lseek(fd, 0, SEEK_SET);
75 if (read(fd, addr, size) != size) {
83 /* return the amount read, just like fread. 0 may mean error or eof */
84 int fread_targphys(target_phys_addr_t dst_addr, size_t nbytes, FILE *f)
87 target_phys_addr_t dst_begin = dst_addr;
91 want = nbytes > sizeof(buf) ? sizeof(buf) : nbytes;
92 did = fread(buf, 1, want, f);
94 cpu_physical_memory_write_rom(dst_addr, buf, did);
100 return dst_addr - dst_begin;
103 /* returns 0 on error, 1 if ok */
104 int fread_targphys_ok(target_phys_addr_t dst_addr, size_t nbytes, FILE *f)
106 return fread_targphys(dst_addr, nbytes, f) == nbytes;
109 /* read()-like version */
110 int read_targphys(int fd, target_phys_addr_t dst_addr, size_t nbytes)
113 target_phys_addr_t dst_begin = dst_addr;
117 want = nbytes > sizeof(buf) ? sizeof(buf) : nbytes;
118 did = read(fd, buf, want);
119 if (did != want) break;
121 cpu_physical_memory_write_rom(dst_addr, buf, did);
125 return dst_addr - dst_begin;
128 /* return the size or -1 if error */
129 int load_image_targphys(const char *filename,
130 target_phys_addr_t addr, int max_sz)
135 f = fopen(filename, "rb");
138 got = fread_targphys(addr, max_sz, f);
139 if (ferror(f)) { fclose(f); return -1; }
145 void pstrcpy_targphys(target_phys_addr_t dest, int buf_size,
148 static const uint8_t nul_byte = 0;
151 if (buf_size <= 0) return;
152 nulp = memchr(source, 0, buf_size);
154 cpu_physical_memory_write_rom(dest, (uint8_t *)source,
155 (nulp - source) + 1);
157 cpu_physical_memory_write_rom(dest, (uint8_t *)source, buf_size - 1);
158 cpu_physical_memory_write_rom(dest, &nul_byte, 1);
166 uint32_t a_info; /* Use macros N_MAGIC, etc for access */
167 uint32_t a_text; /* length of text, in bytes */
168 uint32_t a_data; /* length of data, in bytes */
169 uint32_t a_bss; /* length of uninitialized data area, in bytes */
170 uint32_t a_syms; /* length of symbol table data in file, in bytes */
171 uint32_t a_entry; /* start address */
172 uint32_t a_trsize; /* length of relocation info for text, in bytes */
173 uint32_t a_drsize; /* length of relocation info for data, in bytes */
176 static void bswap_ahdr(struct exec *e)
178 bswap32s(&e->a_info);
179 bswap32s(&e->a_text);
180 bswap32s(&e->a_data);
182 bswap32s(&e->a_syms);
183 bswap32s(&e->a_entry);
184 bswap32s(&e->a_trsize);
185 bswap32s(&e->a_drsize);
188 #define N_MAGIC(exec) ((exec).a_info & 0xffff)
193 #define _N_HDROFF(x) (1024 - sizeof (struct exec))
194 #define N_TXTOFF(x) \
195 (N_MAGIC(x) == ZMAGIC ? _N_HDROFF((x)) + sizeof (struct exec) : \
196 (N_MAGIC(x) == QMAGIC ? 0 : sizeof (struct exec)))
197 #define N_TXTADDR(x, target_page_size) (N_MAGIC(x) == QMAGIC ? target_page_size : 0)
198 #define _N_SEGMENT_ROUND(x, target_page_size) (((x) + target_page_size - 1) & ~(target_page_size - 1))
200 #define _N_TXTENDADDR(x, target_page_size) (N_TXTADDR(x, target_page_size)+(x).a_text)
202 #define N_DATADDR(x, target_page_size) \
203 (N_MAGIC(x)==OMAGIC? (_N_TXTENDADDR(x, target_page_size)) \
204 : (_N_SEGMENT_ROUND (_N_TXTENDADDR(x, target_page_size), target_page_size)))
207 int load_aout(const char *filename, target_phys_addr_t addr, int max_sz,
208 int bswap_needed, target_phys_addr_t target_page_size)
214 fd = open(filename, O_RDONLY | O_BINARY);
218 size = read(fd, &e, sizeof(e));
231 if (e.a_text + e.a_data > max_sz)
233 lseek(fd, N_TXTOFF(e), SEEK_SET);
234 size = read_targphys(fd, addr, e.a_text + e.a_data);
239 if (N_DATADDR(e, target_page_size) + e.a_data > max_sz)
241 lseek(fd, N_TXTOFF(e), SEEK_SET);
242 size = read_targphys(fd, addr, e.a_text);
245 ret = read_targphys(fd, addr + N_DATADDR(e, target_page_size),
263 static void *load_at(int fd, int offset, int size)
266 if (lseek(fd, offset, SEEK_SET) < 0)
268 ptr = qemu_malloc(size);
269 if (read(fd, ptr, size) != size) {
280 #define ELF_CLASS ELFCLASS32
284 #define elf_word uint32_t
285 #define elf_sword int32_t
286 #define bswapSZs bswap32s
298 #define elfhdr elf64_hdr
299 #define elf_phdr elf64_phdr
300 #define elf_note elf64_note
301 #define elf_shdr elf64_shdr
302 #define elf_sym elf64_sym
303 #define elf_word uint64_t
304 #define elf_sword int64_t
305 #define bswapSZs bswap64s
309 /* return < 0 if error, otherwise the number of bytes loaded in memory */
310 int load_elf(const char *filename, int64_t address_offset,
311 uint64_t *pentry, uint64_t *lowaddr, uint64_t *highaddr,
312 int big_endian, int elf_machine, int clear_lsb)
314 int fd, data_order, target_data_order, must_swab, ret;
315 uint8_t e_ident[EI_NIDENT];
317 fd = open(filename, O_RDONLY | O_BINARY);
322 if (read(fd, e_ident, sizeof(e_ident)) != sizeof(e_ident))
324 if (e_ident[0] != ELFMAG0 ||
325 e_ident[1] != ELFMAG1 ||
326 e_ident[2] != ELFMAG2 ||
327 e_ident[3] != ELFMAG3)
329 #ifdef HOST_WORDS_BIGENDIAN
330 data_order = ELFDATA2MSB;
332 data_order = ELFDATA2LSB;
334 must_swab = data_order != e_ident[EI_DATA];
336 target_data_order = ELFDATA2MSB;
338 target_data_order = ELFDATA2LSB;
341 if (target_data_order != e_ident[EI_DATA])
344 lseek(fd, 0, SEEK_SET);
345 if (e_ident[EI_CLASS] == ELFCLASS64) {
346 ret = load_elf64(fd, address_offset, must_swab, pentry,
347 lowaddr, highaddr, elf_machine, clear_lsb);
349 ret = load_elf32(fd, address_offset, must_swab, pentry,
350 lowaddr, highaddr, elf_machine, clear_lsb);
361 static void bswap_uboot_header(uboot_image_header_t *hdr)
363 #ifndef HOST_WORDS_BIGENDIAN
364 bswap32s(&hdr->ih_magic);
365 bswap32s(&hdr->ih_hcrc);
366 bswap32s(&hdr->ih_time);
367 bswap32s(&hdr->ih_size);
368 bswap32s(&hdr->ih_load);
369 bswap32s(&hdr->ih_ep);
370 bswap32s(&hdr->ih_dcrc);
375 #define ZALLOC_ALIGNMENT 16
377 static void *zalloc(void *x, unsigned items, unsigned size)
382 size = (size + ZALLOC_ALIGNMENT - 1) & ~(ZALLOC_ALIGNMENT - 1);
384 p = qemu_malloc(size);
389 static void zfree(void *x, void *addr)
396 #define EXTRA_FIELD 4
399 #define RESERVED 0xe0
403 /* This is the maximum in uboot, so if a uImage overflows this, it would
404 * overflow on real hardware too. */
405 #define UBOOT_MAX_GUNZIP_BYTES 0x800000
407 static ssize_t gunzip(void *dst, size_t dstlen, uint8_t *src,
417 if (src[2] != DEFLATED || (flags & RESERVED) != 0) {
418 puts ("Error: Bad gzipped data\n");
421 if ((flags & EXTRA_FIELD) != 0)
422 i = 12 + src[10] + (src[11] << 8);
423 if ((flags & ORIG_NAME) != 0)
424 while (src[i++] != 0)
426 if ((flags & COMMENT) != 0)
427 while (src[i++] != 0)
429 if ((flags & HEAD_CRC) != 0)
432 puts ("Error: gunzip out of data in header\n");
439 r = inflateInit2(&s, -MAX_WBITS);
441 printf ("Error: inflateInit2() returned %d\n", r);
445 s.avail_in = srclen - i;
447 s.avail_out = dstlen;
448 r = inflate(&s, Z_FINISH);
449 if (r != Z_OK && r != Z_STREAM_END) {
450 printf ("Error: inflate() returned %d\n", r);
453 dstbytes = s.next_out - (unsigned char *) dst;
459 /* Load a U-Boot image. */
460 int load_uimage(const char *filename, target_phys_addr_t *ep,
461 target_phys_addr_t *loadaddr, int *is_linux)
465 uboot_image_header_t h;
466 uboot_image_header_t *hdr = &h;
467 uint8_t *data = NULL;
470 fd = open(filename, O_RDONLY | O_BINARY);
474 size = read(fd, hdr, sizeof(uboot_image_header_t));
478 bswap_uboot_header(hdr);
480 if (hdr->ih_magic != IH_MAGIC)
483 /* TODO: Implement other image types. */
484 if (hdr->ih_type != IH_TYPE_KERNEL) {
485 fprintf(stderr, "Can only load u-boot image type \"kernel\"\n");
489 switch (hdr->ih_comp) {
495 "Unable to load u-boot images with compression type %d\n",
500 /* TODO: Check CPU type. */
502 if (hdr->ih_os == IH_OS_LINUX)
509 data = qemu_malloc(hdr->ih_size);
511 if (read(fd, data, hdr->ih_size) != hdr->ih_size) {
512 fprintf(stderr, "Error reading file\n");
516 if (hdr->ih_comp == IH_COMP_GZIP) {
517 uint8_t *compressed_data;
521 compressed_data = data;
522 max_bytes = UBOOT_MAX_GUNZIP_BYTES;
523 data = qemu_malloc(max_bytes);
525 bytes = gunzip(data, max_bytes, compressed_data, hdr->ih_size);
526 qemu_free(compressed_data);
528 fprintf(stderr, "Unable to decompress gzipped image!\n");
531 hdr->ih_size = bytes;
534 cpu_physical_memory_write_rom(hdr->ih_load, data, hdr->ih_size);
537 *loadaddr = hdr->ih_load;