Disable preadv/pwritev support
[qemu-kvm/fedora.git] / loader.c
blob54580e4c50b48a223544cadd75cb2529e798788d
1 /*
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
22 * THE SOFTWARE.
24 * Gunzip functionality in this file is derived from u-boot:
26 * (C) Copyright 2008 Semihalf
28 * (C) Copyright 2000-2005
29 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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/>.
45 #include "qemu-common.h"
46 #include "disas.h"
47 #include "sysemu.h"
48 #include "uboot_image.h"
50 #include <zlib.h>
52 /* return the size or -1 if error */
53 int get_image_size(const char *filename)
55 int fd, size;
56 fd = open(filename, O_RDONLY | O_BINARY);
57 if (fd < 0)
58 return -1;
59 size = lseek(fd, 0, SEEK_END);
60 close(fd);
61 return size;
64 /* return the size or -1 if error */
65 /* deprecated, because caller does not specify buffer size! */
66 int load_image(const char *filename, uint8_t *addr)
68 int fd, size;
69 fd = open(filename, O_RDONLY | O_BINARY);
70 if (fd < 0)
71 return -1;
72 size = lseek(fd, 0, SEEK_END);
73 lseek(fd, 0, SEEK_SET);
74 if (read(fd, addr, size) != size) {
75 close(fd);
76 return -1;
78 close(fd);
79 return size;
82 /* return the amount read, just like fread. 0 may mean error or eof */
83 int fread_targphys(target_phys_addr_t dst_addr, size_t nbytes, FILE *f)
85 uint8_t buf[4096];
86 target_phys_addr_t dst_begin = dst_addr;
87 size_t want, did;
89 while (nbytes) {
90 want = nbytes > sizeof(buf) ? sizeof(buf) : nbytes;
91 did = fread(buf, 1, want, f);
93 cpu_physical_memory_write_rom(dst_addr, buf, did);
94 dst_addr += did;
95 nbytes -= did;
96 if (did != want)
97 break;
99 return dst_addr - dst_begin;
102 /* returns 0 on error, 1 if ok */
103 int fread_targphys_ok(target_phys_addr_t dst_addr, size_t nbytes, FILE *f)
105 return fread_targphys(dst_addr, nbytes, f) == nbytes;
108 /* read()-like version */
109 int read_targphys(int fd, target_phys_addr_t dst_addr, size_t nbytes)
111 uint8_t buf[4096];
112 target_phys_addr_t dst_begin = dst_addr;
113 size_t want, did;
115 while (nbytes) {
116 want = nbytes > sizeof(buf) ? sizeof(buf) : nbytes;
117 did = read(fd, buf, want);
118 if (did != want) break;
120 cpu_physical_memory_write_rom(dst_addr, buf, did);
121 dst_addr += did;
122 nbytes -= did;
124 return dst_addr - dst_begin;
127 /* return the size or -1 if error */
128 int load_image_targphys(const char *filename,
129 target_phys_addr_t addr, int max_sz)
131 FILE *f;
132 size_t got;
134 f = fopen(filename, "rb");
135 if (!f) return -1;
137 got = fread_targphys(addr, max_sz, f);
138 if (ferror(f)) { fclose(f); return -1; }
139 fclose(f);
141 return got;
144 void pstrcpy_targphys(target_phys_addr_t dest, int buf_size,
145 const char *source)
147 static const uint8_t nul_byte = 0;
148 const char *nulp;
150 if (buf_size <= 0) return;
151 nulp = memchr(source, 0, buf_size);
152 if (nulp) {
153 cpu_physical_memory_write_rom(dest, (uint8_t *)source,
154 (nulp - source) + 1);
155 } else {
156 cpu_physical_memory_write_rom(dest, (uint8_t *)source, buf_size - 1);
157 cpu_physical_memory_write_rom(dest, &nul_byte, 1);
161 /* A.OUT loader */
163 struct exec
165 uint32_t a_info; /* Use macros N_MAGIC, etc for access */
166 uint32_t a_text; /* length of text, in bytes */
167 uint32_t a_data; /* length of data, in bytes */
168 uint32_t a_bss; /* length of uninitialized data area, in bytes */
169 uint32_t a_syms; /* length of symbol table data in file, in bytes */
170 uint32_t a_entry; /* start address */
171 uint32_t a_trsize; /* length of relocation info for text, in bytes */
172 uint32_t a_drsize; /* length of relocation info for data, in bytes */
175 #ifdef BSWAP_NEEDED
176 static void bswap_ahdr(struct exec *e)
178 bswap32s(&e->a_info);
179 bswap32s(&e->a_text);
180 bswap32s(&e->a_data);
181 bswap32s(&e->a_bss);
182 bswap32s(&e->a_syms);
183 bswap32s(&e->a_entry);
184 bswap32s(&e->a_trsize);
185 bswap32s(&e->a_drsize);
187 #else
188 #define bswap_ahdr(x) do { } while (0)
189 #endif
191 #define N_MAGIC(exec) ((exec).a_info & 0xffff)
192 #define OMAGIC 0407
193 #define NMAGIC 0410
194 #define ZMAGIC 0413
195 #define QMAGIC 0314
196 #define _N_HDROFF(x) (1024 - sizeof (struct exec))
197 #define N_TXTOFF(x) \
198 (N_MAGIC(x) == ZMAGIC ? _N_HDROFF((x)) + sizeof (struct exec) : \
199 (N_MAGIC(x) == QMAGIC ? 0 : sizeof (struct exec)))
200 #define N_TXTADDR(x) (N_MAGIC(x) == QMAGIC ? TARGET_PAGE_SIZE : 0)
201 #define _N_SEGMENT_ROUND(x) (((x) + TARGET_PAGE_SIZE - 1) & ~(TARGET_PAGE_SIZE - 1))
203 #define _N_TXTENDADDR(x) (N_TXTADDR(x)+(x).a_text)
205 #define N_DATADDR(x) \
206 (N_MAGIC(x)==OMAGIC? (_N_TXTENDADDR(x)) \
207 : (_N_SEGMENT_ROUND (_N_TXTENDADDR(x))))
210 int load_aout(const char *filename, target_phys_addr_t addr, int max_sz)
212 int fd, size, ret;
213 struct exec e;
214 uint32_t magic;
216 fd = open(filename, O_RDONLY | O_BINARY);
217 if (fd < 0)
218 return -1;
220 size = read(fd, &e, sizeof(e));
221 if (size < 0)
222 goto fail;
224 bswap_ahdr(&e);
226 magic = N_MAGIC(e);
227 switch (magic) {
228 case ZMAGIC:
229 case QMAGIC:
230 case OMAGIC:
231 if (e.a_text + e.a_data > max_sz)
232 goto fail;
233 lseek(fd, N_TXTOFF(e), SEEK_SET);
234 size = read_targphys(fd, addr, e.a_text + e.a_data);
235 if (size < 0)
236 goto fail;
237 break;
238 case NMAGIC:
239 if (N_DATADDR(e) + e.a_data > max_sz)
240 goto fail;
241 lseek(fd, N_TXTOFF(e), SEEK_SET);
242 size = read_targphys(fd, addr, e.a_text);
243 if (size < 0)
244 goto fail;
245 ret = read_targphys(fd, addr + N_DATADDR(e), e.a_data);
246 if (ret < 0)
247 goto fail;
248 size += ret;
249 break;
250 default:
251 goto fail;
253 close(fd);
254 return size;
255 fail:
256 close(fd);
257 return -1;
260 /* ELF loader */
262 static void *load_at(int fd, int offset, int size)
264 void *ptr;
265 if (lseek(fd, offset, SEEK_SET) < 0)
266 return NULL;
267 ptr = qemu_malloc(size);
268 if (read(fd, ptr, size) != size) {
269 qemu_free(ptr);
270 return NULL;
272 return ptr;
276 #define ELF_CLASS ELFCLASS32
277 #include "elf.h"
279 #define SZ 32
280 #define elf_word uint32_t
281 #define elf_sword int32_t
282 #define bswapSZs bswap32s
283 #include "elf_ops.h"
285 #undef elfhdr
286 #undef elf_phdr
287 #undef elf_shdr
288 #undef elf_sym
289 #undef elf_note
290 #undef elf_word
291 #undef elf_sword
292 #undef bswapSZs
293 #undef SZ
294 #define elfhdr elf64_hdr
295 #define elf_phdr elf64_phdr
296 #define elf_note elf64_note
297 #define elf_shdr elf64_shdr
298 #define elf_sym elf64_sym
299 #define elf_word uint64_t
300 #define elf_sword int64_t
301 #define bswapSZs bswap64s
302 #define SZ 64
303 #include "elf_ops.h"
305 /* return < 0 if error, otherwise the number of bytes loaded in memory */
306 int load_elf(const char *filename, int64_t address_offset,
307 uint64_t *pentry, uint64_t *lowaddr, uint64_t *highaddr)
309 int fd, data_order, host_data_order, must_swab, ret;
310 uint8_t e_ident[EI_NIDENT];
312 fd = open(filename, O_RDONLY | O_BINARY);
313 if (fd < 0) {
314 perror(filename);
315 return -1;
317 if (read(fd, e_ident, sizeof(e_ident)) != sizeof(e_ident))
318 goto fail;
319 if (e_ident[0] != ELFMAG0 ||
320 e_ident[1] != ELFMAG1 ||
321 e_ident[2] != ELFMAG2 ||
322 e_ident[3] != ELFMAG3)
323 goto fail;
324 #ifdef WORDS_BIGENDIAN
325 data_order = ELFDATA2MSB;
326 #else
327 data_order = ELFDATA2LSB;
328 #endif
329 must_swab = data_order != e_ident[EI_DATA];
331 #ifdef TARGET_WORDS_BIGENDIAN
332 host_data_order = ELFDATA2MSB;
333 #else
334 host_data_order = ELFDATA2LSB;
335 #endif
336 if (host_data_order != e_ident[EI_DATA])
337 return -1;
339 lseek(fd, 0, SEEK_SET);
340 if (e_ident[EI_CLASS] == ELFCLASS64) {
341 ret = load_elf64(fd, address_offset, must_swab, pentry,
342 lowaddr, highaddr);
343 } else {
344 ret = load_elf32(fd, address_offset, must_swab, pentry,
345 lowaddr, highaddr);
348 close(fd);
349 return ret;
351 fail:
352 close(fd);
353 return -1;
356 static void bswap_uboot_header(uboot_image_header_t *hdr)
358 #ifndef WORDS_BIGENDIAN
359 bswap32s(&hdr->ih_magic);
360 bswap32s(&hdr->ih_hcrc);
361 bswap32s(&hdr->ih_time);
362 bswap32s(&hdr->ih_size);
363 bswap32s(&hdr->ih_load);
364 bswap32s(&hdr->ih_ep);
365 bswap32s(&hdr->ih_dcrc);
366 #endif
370 #define ZALLOC_ALIGNMENT 16
372 static void *zalloc(void *x, unsigned items, unsigned size)
374 void *p;
376 size *= items;
377 size = (size + ZALLOC_ALIGNMENT - 1) & ~(ZALLOC_ALIGNMENT - 1);
379 p = qemu_malloc(size);
381 return (p);
384 static void zfree(void *x, void *addr)
386 qemu_free(addr);
390 #define HEAD_CRC 2
391 #define EXTRA_FIELD 4
392 #define ORIG_NAME 8
393 #define COMMENT 0x10
394 #define RESERVED 0xe0
396 #define DEFLATED 8
398 /* This is the maximum in uboot, so if a uImage overflows this, it would
399 * overflow on real hardware too. */
400 #define UBOOT_MAX_GUNZIP_BYTES 0x800000
402 static ssize_t gunzip(void *dst, size_t dstlen, uint8_t *src,
403 size_t srclen)
405 z_stream s;
406 ssize_t dstbytes;
407 int r, i, flags;
409 /* skip header */
410 i = 10;
411 flags = src[3];
412 if (src[2] != DEFLATED || (flags & RESERVED) != 0) {
413 puts ("Error: Bad gzipped data\n");
414 return -1;
416 if ((flags & EXTRA_FIELD) != 0)
417 i = 12 + src[10] + (src[11] << 8);
418 if ((flags & ORIG_NAME) != 0)
419 while (src[i++] != 0)
421 if ((flags & COMMENT) != 0)
422 while (src[i++] != 0)
424 if ((flags & HEAD_CRC) != 0)
425 i += 2;
426 if (i >= srclen) {
427 puts ("Error: gunzip out of data in header\n");
428 return -1;
431 s.zalloc = zalloc;
432 s.zfree = zfree;
434 r = inflateInit2(&s, -MAX_WBITS);
435 if (r != Z_OK) {
436 printf ("Error: inflateInit2() returned %d\n", r);
437 return (-1);
439 s.next_in = src + i;
440 s.avail_in = srclen - i;
441 s.next_out = dst;
442 s.avail_out = dstlen;
443 r = inflate(&s, Z_FINISH);
444 if (r != Z_OK && r != Z_STREAM_END) {
445 printf ("Error: inflate() returned %d\n", r);
446 return -1;
448 dstbytes = s.next_out - (unsigned char *) dst;
449 inflateEnd(&s);
451 return dstbytes;
454 /* Load a U-Boot image. */
455 int load_uimage(const char *filename, target_ulong *ep, target_ulong *loadaddr,
456 int *is_linux)
458 int fd;
459 int size;
460 uboot_image_header_t h;
461 uboot_image_header_t *hdr = &h;
462 uint8_t *data = NULL;
463 int ret = -1;
465 fd = open(filename, O_RDONLY | O_BINARY);
466 if (fd < 0)
467 return -1;
469 size = read(fd, hdr, sizeof(uboot_image_header_t));
470 if (size < 0)
471 goto out;
473 bswap_uboot_header(hdr);
475 if (hdr->ih_magic != IH_MAGIC)
476 goto out;
478 /* TODO: Implement other image types. */
479 if (hdr->ih_type != IH_TYPE_KERNEL) {
480 fprintf(stderr, "Can only load u-boot image type \"kernel\"\n");
481 goto out;
484 switch (hdr->ih_comp) {
485 case IH_COMP_NONE:
486 case IH_COMP_GZIP:
487 break;
488 default:
489 fprintf(stderr,
490 "Unable to load u-boot images with compression type %d\n",
491 hdr->ih_comp);
492 goto out;
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;
503 *ep = hdr->ih_ep;
504 data = qemu_malloc(hdr->ih_size);
506 if (read(fd, data, hdr->ih_size) != hdr->ih_size) {
507 fprintf(stderr, "Error reading file\n");
508 goto out;
511 if (hdr->ih_comp == IH_COMP_GZIP) {
512 uint8_t *compressed_data;
513 size_t max_bytes;
514 ssize_t bytes;
516 compressed_data = data;
517 max_bytes = UBOOT_MAX_GUNZIP_BYTES;
518 data = qemu_malloc(max_bytes);
520 bytes = gunzip(data, max_bytes, compressed_data, hdr->ih_size);
521 qemu_free(compressed_data);
522 if (bytes < 0) {
523 fprintf(stderr, "Unable to decompress gzipped image!\n");
524 goto out;
526 hdr->ih_size = bytes;
529 cpu_physical_memory_write_rom(hdr->ih_load, data, hdr->ih_size);
531 if (loadaddr)
532 *loadaddr = hdr->ih_load;
534 ret = hdr->ih_size;
536 out:
537 if (data)
538 qemu_free(data);
539 close(fd);
540 return ret;