summaryrefslogtreecommitdiff
blob: 54580e4c50b48a223544cadd75cb2529e798788d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
/*
 * QEMU Executable loader
 *
 * Copyright (c) 2006 Fabrice Bellard
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 *
 * Gunzip functionality in this file is derived from u-boot:
 *
 * (C) Copyright 2008 Semihalf
 *
 * (C) Copyright 2000-2005
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, see <http://www.gnu.org/licenses/>.
 */

#include "qemu-common.h"
#include "disas.h"
#include "sysemu.h"
#include "uboot_image.h"

#include <zlib.h>

/* return the size or -1 if error */
int get_image_size(const char *filename)
{
    int fd, size;
    fd = open(filename, O_RDONLY | O_BINARY);
    if (fd < 0)
        return -1;
    size = lseek(fd, 0, SEEK_END);
    close(fd);
    return size;
}

/* return the size or -1 if error */
/* deprecated, because caller does not specify buffer size! */
int load_image(const char *filename, uint8_t *addr)
{
    int fd, size;
    fd = open(filename, O_RDONLY | O_BINARY);
    if (fd < 0)
        return -1;
    size = lseek(fd, 0, SEEK_END);
    lseek(fd, 0, SEEK_SET);
    if (read(fd, addr, size) != size) {
        close(fd);
        return -1;
    }
    close(fd);
    return size;
}

/* return the amount read, just like fread.  0 may mean error or eof */
int fread_targphys(target_phys_addr_t dst_addr, size_t nbytes, FILE *f)
{
    uint8_t buf[4096];
    target_phys_addr_t dst_begin = dst_addr;
    size_t want, did;

    while (nbytes) {
	want = nbytes > sizeof(buf) ? sizeof(buf) : nbytes;
	did = fread(buf, 1, want, f);

	cpu_physical_memory_write_rom(dst_addr, buf, did);
	dst_addr += did;
	nbytes -= did;
	if (did != want)
	    break;
    }
    return dst_addr - dst_begin;
}

/* returns 0 on error, 1 if ok */
int fread_targphys_ok(target_phys_addr_t dst_addr, size_t nbytes, FILE *f)
{
    return fread_targphys(dst_addr, nbytes, f) == nbytes;
}

/* read()-like version */
int read_targphys(int fd, target_phys_addr_t dst_addr, size_t nbytes)
{
    uint8_t buf[4096];
    target_phys_addr_t dst_begin = dst_addr;
    size_t want, did;

    while (nbytes) {
	want = nbytes > sizeof(buf) ? sizeof(buf) : nbytes;
	did = read(fd, buf, want);
	if (did != want) break;

	cpu_physical_memory_write_rom(dst_addr, buf, did);
	dst_addr += did;
	nbytes -= did;
    }
    return dst_addr - dst_begin;
}

/* return the size or -1 if error */
int load_image_targphys(const char *filename,
			target_phys_addr_t addr, int max_sz)
{
    FILE *f;
    size_t got;

    f = fopen(filename, "rb");
    if (!f) return -1;

    got = fread_targphys(addr, max_sz, f);
    if (ferror(f)) { fclose(f); return -1; }
    fclose(f);

    return got;
}

void pstrcpy_targphys(target_phys_addr_t dest, int buf_size,
                      const char *source)
{
    static const uint8_t nul_byte = 0;
    const char *nulp;

    if (buf_size <= 0) return;
    nulp = memchr(source, 0, buf_size);
    if (nulp) {
	cpu_physical_memory_write_rom(dest, (uint8_t *)source,
                                      (nulp - source) + 1);
    } else {
	cpu_physical_memory_write_rom(dest, (uint8_t *)source, buf_size - 1);
	cpu_physical_memory_write_rom(dest, &nul_byte, 1);
    }
}

/* A.OUT loader */

struct exec
{
  uint32_t a_info;   /* Use macros N_MAGIC, etc for access */
  uint32_t a_text;   /* length of text, in bytes */
  uint32_t a_data;   /* length of data, in bytes */
  uint32_t a_bss;    /* length of uninitialized data area, in bytes */
  uint32_t a_syms;   /* length of symbol table data in file, in bytes */
  uint32_t a_entry;  /* start address */
  uint32_t a_trsize; /* length of relocation info for text, in bytes */
  uint32_t a_drsize; /* length of relocation info for data, in bytes */
};

#ifdef BSWAP_NEEDED
static void bswap_ahdr(struct exec *e)
{
    bswap32s(&e->a_info);
    bswap32s(&e->a_text);
    bswap32s(&e->a_data);
    bswap32s(&e->a_bss);
    bswap32s(&e->a_syms);
    bswap32s(&e->a_entry);
    bswap32s(&e->a_trsize);
    bswap32s(&e->a_drsize);
}
#else
#define bswap_ahdr(x) do { } while (0)
#endif

#define N_MAGIC(exec) ((exec).a_info & 0xffff)
#define OMAGIC 0407
#define NMAGIC 0410
#define ZMAGIC 0413
#define QMAGIC 0314
#define _N_HDROFF(x) (1024 - sizeof (struct exec))
#define N_TXTOFF(x)							\
    (N_MAGIC(x) == ZMAGIC ? _N_HDROFF((x)) + sizeof (struct exec) :	\
     (N_MAGIC(x) == QMAGIC ? 0 : sizeof (struct exec)))
#define N_TXTADDR(x) (N_MAGIC(x) == QMAGIC ? TARGET_PAGE_SIZE : 0)
#define _N_SEGMENT_ROUND(x) (((x) + TARGET_PAGE_SIZE - 1) & ~(TARGET_PAGE_SIZE - 1))

#define _N_TXTENDADDR(x) (N_TXTADDR(x)+(x).a_text)

#define N_DATADDR(x) \
    (N_MAGIC(x)==OMAGIC? (_N_TXTENDADDR(x)) \
     : (_N_SEGMENT_ROUND (_N_TXTENDADDR(x))))


int load_aout(const char *filename, target_phys_addr_t addr, int max_sz)
{
    int fd, size, ret;
    struct exec e;
    uint32_t magic;

    fd = open(filename, O_RDONLY | O_BINARY);
    if (fd < 0)
        return -1;

    size = read(fd, &e, sizeof(e));
    if (size < 0)
        goto fail;

    bswap_ahdr(&e);

    magic = N_MAGIC(e);
    switch (magic) {
    case ZMAGIC:
    case QMAGIC:
    case OMAGIC:
        if (e.a_text + e.a_data > max_sz)
            goto fail;
	lseek(fd, N_TXTOFF(e), SEEK_SET);
	size = read_targphys(fd, addr, e.a_text + e.a_data);
	if (size < 0)
	    goto fail;
	break;
    case NMAGIC:
        if (N_DATADDR(e) + e.a_data > max_sz)
            goto fail;
	lseek(fd, N_TXTOFF(e), SEEK_SET);
	size = read_targphys(fd, addr, e.a_text);
	if (size < 0)
	    goto fail;
	ret = read_targphys(fd, addr + N_DATADDR(e), e.a_data);
	if (ret < 0)
	    goto fail;
	size += ret;
	break;
    default:
	goto fail;
    }
    close(fd);
    return size;
 fail:
    close(fd);
    return -1;
}

/* ELF loader */

static void *load_at(int fd, int offset, int size)
{
    void *ptr;
    if (lseek(fd, offset, SEEK_SET) < 0)
        return NULL;
    ptr = qemu_malloc(size);
    if (read(fd, ptr, size) != size) {
        qemu_free(ptr);
        return NULL;
    }
    return ptr;
}


#define ELF_CLASS   ELFCLASS32
#include "elf.h"

#define SZ		32
#define elf_word        uint32_t
#define elf_sword        int32_t
#define bswapSZs	bswap32s
#include "elf_ops.h"

#undef elfhdr
#undef elf_phdr
#undef elf_shdr
#undef elf_sym
#undef elf_note
#undef elf_word
#undef elf_sword
#undef bswapSZs
#undef SZ
#define elfhdr		elf64_hdr
#define elf_phdr	elf64_phdr
#define elf_note	elf64_note
#define elf_shdr	elf64_shdr
#define elf_sym		elf64_sym
#define elf_word        uint64_t
#define elf_sword        int64_t
#define bswapSZs	bswap64s
#define SZ		64
#include "elf_ops.h"

/* return < 0 if error, otherwise the number of bytes loaded in memory */
int load_elf(const char *filename, int64_t address_offset,
             uint64_t *pentry, uint64_t *lowaddr, uint64_t *highaddr)
{
    int fd, data_order, host_data_order, must_swab, ret;
    uint8_t e_ident[EI_NIDENT];

    fd = open(filename, O_RDONLY | O_BINARY);
    if (fd < 0) {
        perror(filename);
        return -1;
    }
    if (read(fd, e_ident, sizeof(e_ident)) != sizeof(e_ident))
        goto fail;
    if (e_ident[0] != ELFMAG0 ||
        e_ident[1] != ELFMAG1 ||
        e_ident[2] != ELFMAG2 ||
        e_ident[3] != ELFMAG3)
        goto fail;
#ifdef WORDS_BIGENDIAN
    data_order = ELFDATA2MSB;
#else
    data_order = ELFDATA2LSB;
#endif
    must_swab = data_order != e_ident[EI_DATA];

#ifdef TARGET_WORDS_BIGENDIAN
    host_data_order = ELFDATA2MSB;
#else
    host_data_order = ELFDATA2LSB;
#endif
    if (host_data_order != e_ident[EI_DATA])
        return -1;

    lseek(fd, 0, SEEK_SET);
    if (e_ident[EI_CLASS] == ELFCLASS64) {
        ret = load_elf64(fd, address_offset, must_swab, pentry,
                         lowaddr, highaddr);
    } else {
        ret = load_elf32(fd, address_offset, must_swab, pentry,
                         lowaddr, highaddr);
    }

    close(fd);
    return ret;

 fail:
    close(fd);
    return -1;
}

static void bswap_uboot_header(uboot_image_header_t *hdr)
{
#ifndef WORDS_BIGENDIAN
    bswap32s(&hdr->ih_magic);
    bswap32s(&hdr->ih_hcrc);
    bswap32s(&hdr->ih_time);
    bswap32s(&hdr->ih_size);
    bswap32s(&hdr->ih_load);
    bswap32s(&hdr->ih_ep);
    bswap32s(&hdr->ih_dcrc);
#endif
}


#define ZALLOC_ALIGNMENT	16

static void *zalloc(void *x, unsigned items, unsigned size)
{
    void *p;

    size *= items;
    size = (size + ZALLOC_ALIGNMENT - 1) & ~(ZALLOC_ALIGNMENT - 1);

    p = qemu_malloc(size);

    return (p);
}

static void zfree(void *x, void *addr)
{
    qemu_free(addr);
}


#define HEAD_CRC	2
#define EXTRA_FIELD	4
#define ORIG_NAME	8
#define COMMENT		0x10
#define RESERVED	0xe0

#define DEFLATED	8

/* This is the maximum in uboot, so if a uImage overflows this, it would
 * overflow on real hardware too. */
#define UBOOT_MAX_GUNZIP_BYTES 0x800000

static ssize_t gunzip(void *dst, size_t dstlen, uint8_t *src,
                      size_t srclen)
{
    z_stream s;
    ssize_t dstbytes;
    int r, i, flags;

    /* skip header */
    i = 10;
    flags = src[3];
    if (src[2] != DEFLATED || (flags & RESERVED) != 0) {
        puts ("Error: Bad gzipped data\n");
        return -1;
    }
    if ((flags & EXTRA_FIELD) != 0)
        i = 12 + src[10] + (src[11] << 8);
    if ((flags & ORIG_NAME) != 0)
        while (src[i++] != 0)
            ;
    if ((flags & COMMENT) != 0)
        while (src[i++] != 0)
            ;
    if ((flags & HEAD_CRC) != 0)
        i += 2;
    if (i >= srclen) {
        puts ("Error: gunzip out of data in header\n");
        return -1;
    }

    s.zalloc = zalloc;
    s.zfree = zfree;

    r = inflateInit2(&s, -MAX_WBITS);
    if (r != Z_OK) {
        printf ("Error: inflateInit2() returned %d\n", r);
        return (-1);
    }
    s.next_in = src + i;
    s.avail_in = srclen - i;
    s.next_out = dst;
    s.avail_out = dstlen;
    r = inflate(&s, Z_FINISH);
    if (r != Z_OK && r != Z_STREAM_END) {
        printf ("Error: inflate() returned %d\n", r);
        return -1;
    }
    dstbytes = s.next_out - (unsigned char *) dst;
    inflateEnd(&s);

    return dstbytes;
}

/* Load a U-Boot image.  */
int load_uimage(const char *filename, target_ulong *ep, target_ulong *loadaddr,
                int *is_linux)
{
    int fd;
    int size;
    uboot_image_header_t h;
    uboot_image_header_t *hdr = &h;
    uint8_t *data = NULL;
    int ret = -1;

    fd = open(filename, O_RDONLY | O_BINARY);
    if (fd < 0)
        return -1;

    size = read(fd, hdr, sizeof(uboot_image_header_t));
    if (size < 0)
        goto out;

    bswap_uboot_header(hdr);

    if (hdr->ih_magic != IH_MAGIC)
        goto out;

    /* TODO: Implement other image types.  */
    if (hdr->ih_type != IH_TYPE_KERNEL) {
        fprintf(stderr, "Can only load u-boot image type \"kernel\"\n");
        goto out;
    }

    switch (hdr->ih_comp) {
    case IH_COMP_NONE:
    case IH_COMP_GZIP:
        break;
    default:
        fprintf(stderr,
                "Unable to load u-boot images with compression type %d\n",
                hdr->ih_comp);
        goto out;
    }

    /* TODO: Check CPU type.  */
    if (is_linux) {
        if (hdr->ih_os == IH_OS_LINUX)
            *is_linux = 1;
        else
            *is_linux = 0;
    }

    *ep = hdr->ih_ep;
    data = qemu_malloc(hdr->ih_size);

    if (read(fd, data, hdr->ih_size) != hdr->ih_size) {
        fprintf(stderr, "Error reading file\n");
        goto out;
    }

    if (hdr->ih_comp == IH_COMP_GZIP) {
        uint8_t *compressed_data;
        size_t max_bytes;
        ssize_t bytes;

        compressed_data = data;
        max_bytes = UBOOT_MAX_GUNZIP_BYTES;
        data = qemu_malloc(max_bytes);

        bytes = gunzip(data, max_bytes, compressed_data, hdr->ih_size);
        qemu_free(compressed_data);
        if (bytes < 0) {
            fprintf(stderr, "Unable to decompress gzipped image!\n");
            goto out;
        }
        hdr->ih_size = bytes;
    }

    cpu_physical_memory_write_rom(hdr->ih_load, data, hdr->ih_size);

    if (loadaddr)
        *loadaddr = hdr->ih_load;

    ret = hdr->ih_size;

out:
    if (data)
        qemu_free(data);
    close(fd);
    return ret;
}