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/*
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* QEMU Executable loader
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*
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* Copyright (c) 2006 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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* Gunzip functionality in this file is derived from u-boot:
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*
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* (C) Copyright 2008 Semihalf
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*
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* (C) Copyright 2000-2005
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "qemu-common.h" |
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#include "disas.h" |
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#include "sysemu.h" |
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#include "uboot_image.h" |
50 |
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#include <zlib.h> |
52 |
|
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/* return the size or -1 if error */
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int get_image_size(const char *filename) |
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{ |
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int fd, size;
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fd = open(filename, O_RDONLY | O_BINARY); |
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if (fd < 0) |
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return -1; |
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size = lseek(fd, 0, SEEK_END);
|
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close(fd); |
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return size;
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} |
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|
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/* return the size or -1 if error */
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/* deprecated, because caller does not specify buffer size! */
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int load_image(const char *filename, uint8_t *addr) |
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{ |
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int fd, size;
|
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fd = open(filename, O_RDONLY | O_BINARY); |
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if (fd < 0) |
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return -1; |
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size = lseek(fd, 0, SEEK_END);
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lseek(fd, 0, SEEK_SET);
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if (read(fd, addr, size) != size) {
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close(fd); |
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return -1; |
78 |
} |
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close(fd); |
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return size;
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} |
82 |
|
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/* return the amount read, just like fread. 0 may mean error or eof */
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int fread_targphys(target_phys_addr_t dst_addr, size_t nbytes, FILE *f)
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{ |
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uint8_t buf[4096];
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target_phys_addr_t dst_begin = dst_addr; |
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size_t want, did; |
89 |
|
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while (nbytes) {
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want = nbytes > sizeof(buf) ? sizeof(buf) : nbytes; |
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did = fread(buf, 1, want, f);
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|
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cpu_physical_memory_write_rom(dst_addr, buf, did); |
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dst_addr += did; |
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nbytes -= did; |
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if (did != want)
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break;
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} |
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return dst_addr - dst_begin;
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} |
102 |
|
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/* returns 0 on error, 1 if ok */
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int fread_targphys_ok(target_phys_addr_t dst_addr, size_t nbytes, FILE *f)
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{ |
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return fread_targphys(dst_addr, nbytes, f) == nbytes;
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} |
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|
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/* read()-like version */
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int read_targphys(int fd, target_phys_addr_t dst_addr, size_t nbytes) |
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{ |
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uint8_t buf[4096];
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target_phys_addr_t dst_begin = dst_addr; |
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size_t want, did; |
115 |
|
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while (nbytes) {
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want = nbytes > sizeof(buf) ? sizeof(buf) : nbytes; |
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did = read(fd, buf, want); |
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if (did != want) break; |
120 |
|
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cpu_physical_memory_write_rom(dst_addr, buf, did); |
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dst_addr += did; |
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nbytes -= did; |
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} |
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return dst_addr - dst_begin;
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} |
127 |
|
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/* return the size or -1 if error */
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int load_image_targphys(const char *filename, |
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target_phys_addr_t addr, int max_sz)
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{ |
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FILE *f; |
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size_t got; |
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|
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f = fopen(filename, "rb");
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if (!f) return -1; |
137 |
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got = fread_targphys(addr, max_sz, f); |
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if (ferror(f)) { fclose(f); return -1; } |
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fclose(f); |
141 |
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return got;
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} |
144 |
|
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void pstrcpy_targphys(target_phys_addr_t dest, int buf_size, |
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const char *source) |
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{ |
148 |
static const uint8_t nul_byte = 0; |
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const char *nulp; |
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|
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if (buf_size <= 0) return; |
152 |
nulp = memchr(source, 0, buf_size);
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if (nulp) {
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cpu_physical_memory_write_rom(dest, (uint8_t *)source, |
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(nulp - source) + 1);
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} else {
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cpu_physical_memory_write_rom(dest, (uint8_t *)source, buf_size - 1);
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cpu_physical_memory_write_rom(dest, &nul_byte, 1);
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} |
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} |
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/* A.OUT loader */
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struct exec
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{ |
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uint32_t a_info; /* Use macros N_MAGIC, etc for access */
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uint32_t a_text; /* length of text, in bytes */
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uint32_t a_data; /* length of data, in bytes */
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uint32_t a_bss; /* length of uninitialized data area, in bytes */
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uint32_t a_syms; /* length of symbol table data in file, in bytes */
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uint32_t a_entry; /* start address */
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uint32_t a_trsize; /* length of relocation info for text, in bytes */
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uint32_t a_drsize; /* length of relocation info for data, in bytes */
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}; |
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#ifdef BSWAP_NEEDED
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static void bswap_ahdr(struct exec *e) |
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{ |
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bswap32s(&e->a_info); |
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bswap32s(&e->a_text); |
181 |
bswap32s(&e->a_data); |
182 |
bswap32s(&e->a_bss); |
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bswap32s(&e->a_syms); |
184 |
bswap32s(&e->a_entry); |
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bswap32s(&e->a_trsize); |
186 |
bswap32s(&e->a_drsize); |
187 |
} |
188 |
#else
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#define bswap_ahdr(x) do { } while (0) |
190 |
#endif
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#define N_MAGIC(exec) ((exec).a_info & 0xffff) |
193 |
#define OMAGIC 0407 |
194 |
#define NMAGIC 0410 |
195 |
#define ZMAGIC 0413 |
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#define QMAGIC 0314 |
197 |
#define _N_HDROFF(x) (1024 - sizeof (struct exec)) |
198 |
#define N_TXTOFF(x) \
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(N_MAGIC(x) == ZMAGIC ? _N_HDROFF((x)) + sizeof (struct exec) : \ |
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(N_MAGIC(x) == QMAGIC ? 0 : sizeof (struct exec))) |
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#define N_TXTADDR(x) (N_MAGIC(x) == QMAGIC ? TARGET_PAGE_SIZE : 0) |
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#define _N_SEGMENT_ROUND(x) (((x) + TARGET_PAGE_SIZE - 1) & ~(TARGET_PAGE_SIZE - 1)) |
203 |
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#define _N_TXTENDADDR(x) (N_TXTADDR(x)+(x).a_text)
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|
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#define N_DATADDR(x) \
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(N_MAGIC(x)==OMAGIC? (_N_TXTENDADDR(x)) \ |
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: (_N_SEGMENT_ROUND (_N_TXTENDADDR(x)))) |
209 |
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int load_aout(const char *filename, target_phys_addr_t addr, int max_sz) |
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{ |
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int fd, size, ret;
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struct exec e;
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uint32_t magic; |
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fd = open(filename, O_RDONLY | O_BINARY); |
218 |
if (fd < 0) |
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return -1; |
220 |
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size = read(fd, &e, sizeof(e));
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if (size < 0) |
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goto fail;
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bswap_ahdr(&e); |
226 |
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magic = N_MAGIC(e); |
228 |
switch (magic) {
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case ZMAGIC:
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case QMAGIC:
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case OMAGIC:
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if (e.a_text + e.a_data > max_sz)
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goto fail;
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lseek(fd, N_TXTOFF(e), SEEK_SET); |
235 |
size = read_targphys(fd, addr, e.a_text + e.a_data); |
236 |
if (size < 0) |
237 |
goto fail;
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break;
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case NMAGIC:
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if (N_DATADDR(e) + e.a_data > max_sz)
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goto fail;
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lseek(fd, N_TXTOFF(e), SEEK_SET); |
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size = read_targphys(fd, addr, e.a_text); |
244 |
if (size < 0) |
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goto fail;
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ret = read_targphys(fd, addr + N_DATADDR(e), e.a_data); |
247 |
if (ret < 0) |
248 |
goto fail;
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size += ret; |
250 |
break;
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default:
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goto fail;
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} |
254 |
close(fd); |
255 |
return size;
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fail:
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close(fd); |
258 |
return -1; |
259 |
} |
260 |
|
261 |
/* ELF loader */
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262 |
|
263 |
static void *load_at(int fd, int offset, int size) |
264 |
{ |
265 |
void *ptr;
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if (lseek(fd, offset, SEEK_SET) < 0) |
267 |
return NULL; |
268 |
ptr = qemu_malloc(size); |
269 |
if (read(fd, ptr, size) != size) {
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qemu_free(ptr); |
271 |
return NULL; |
272 |
} |
273 |
return ptr;
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} |
275 |
|
276 |
|
277 |
#define ELF_CLASS ELFCLASS32
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278 |
#include "elf.h" |
279 |
|
280 |
#define SZ 32 |
281 |
#define elf_word uint32_t
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282 |
#define elf_sword int32_t
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283 |
#define bswapSZs bswap32s
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284 |
#include "elf_ops.h" |
285 |
|
286 |
#undef elfhdr
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287 |
#undef elf_phdr
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288 |
#undef elf_shdr
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289 |
#undef elf_sym
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290 |
#undef elf_note
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291 |
#undef elf_word
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292 |
#undef elf_sword
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293 |
#undef bswapSZs
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294 |
#undef SZ
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295 |
#define elfhdr elf64_hdr
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296 |
#define elf_phdr elf64_phdr
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297 |
#define elf_note elf64_note
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298 |
#define elf_shdr elf64_shdr
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299 |
#define elf_sym elf64_sym
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300 |
#define elf_word uint64_t
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301 |
#define elf_sword int64_t
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302 |
#define bswapSZs bswap64s
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303 |
#define SZ 64 |
304 |
#include "elf_ops.h" |
305 |
|
306 |
/* return < 0 if error, otherwise the number of bytes loaded in memory */
|
307 |
int load_elf(const char *filename, int64_t address_offset, |
308 |
uint64_t *pentry, uint64_t *lowaddr, uint64_t *highaddr) |
309 |
{ |
310 |
int fd, data_order, host_data_order, must_swab, ret;
|
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 |
goto fail;
|
325 |
#ifdef WORDS_BIGENDIAN
|
326 |
data_order = ELFDATA2MSB; |
327 |
#else
|
328 |
data_order = ELFDATA2LSB; |
329 |
#endif
|
330 |
must_swab = data_order != e_ident[EI_DATA]; |
331 |
|
332 |
#ifdef TARGET_WORDS_BIGENDIAN
|
333 |
host_data_order = ELFDATA2MSB; |
334 |
#else
|
335 |
host_data_order = ELFDATA2LSB; |
336 |
#endif
|
337 |
if (host_data_order != e_ident[EI_DATA])
|
338 |
return -1; |
339 |
|
340 |
lseek(fd, 0, SEEK_SET);
|
341 |
if (e_ident[EI_CLASS] == ELFCLASS64) {
|
342 |
ret = load_elf64(fd, address_offset, must_swab, pentry, |
343 |
lowaddr, highaddr); |
344 |
} else {
|
345 |
ret = load_elf32(fd, address_offset, must_swab, pentry, |
346 |
lowaddr, highaddr); |
347 |
} |
348 |
|
349 |
close(fd); |
350 |
return ret;
|
351 |
|
352 |
fail:
|
353 |
close(fd); |
354 |
return -1; |
355 |
} |
356 |
|
357 |
static void bswap_uboot_header(uboot_image_header_t *hdr) |
358 |
{ |
359 |
#ifndef WORDS_BIGENDIAN
|
360 |
bswap32s(&hdr->ih_magic); |
361 |
bswap32s(&hdr->ih_hcrc); |
362 |
bswap32s(&hdr->ih_time); |
363 |
bswap32s(&hdr->ih_size); |
364 |
bswap32s(&hdr->ih_load); |
365 |
bswap32s(&hdr->ih_ep); |
366 |
bswap32s(&hdr->ih_dcrc); |
367 |
#endif
|
368 |
} |
369 |
|
370 |
|
371 |
#define ZALLOC_ALIGNMENT 16 |
372 |
|
373 |
static void *zalloc(void *x, unsigned items, unsigned size) |
374 |
{ |
375 |
void *p;
|
376 |
|
377 |
size *= items; |
378 |
size = (size + ZALLOC_ALIGNMENT - 1) & ~(ZALLOC_ALIGNMENT - 1); |
379 |
|
380 |
p = qemu_malloc(size); |
381 |
|
382 |
return (p);
|
383 |
} |
384 |
|
385 |
static void zfree(void *x, void *addr, unsigned nb) |
386 |
{ |
387 |
qemu_free(addr); |
388 |
} |
389 |
|
390 |
|
391 |
#define HEAD_CRC 2 |
392 |
#define EXTRA_FIELD 4 |
393 |
#define ORIG_NAME 8 |
394 |
#define COMMENT 0x10 |
395 |
#define RESERVED 0xe0 |
396 |
|
397 |
#define DEFLATED 8 |
398 |
|
399 |
/* This is the maximum in uboot, so if a uImage overflows this, it would
|
400 |
* overflow on real hardware too. */
|
401 |
#define UBOOT_MAX_GUNZIP_BYTES 0x800000 |
402 |
|
403 |
static ssize_t gunzip(void *dst, size_t dstlen, uint8_t *src, |
404 |
size_t srclen) |
405 |
{ |
406 |
z_stream s; |
407 |
ssize_t dstbytes; |
408 |
int r, i, flags;
|
409 |
|
410 |
/* skip header */
|
411 |
i = 10;
|
412 |
flags = src[3];
|
413 |
if (src[2] != DEFLATED || (flags & RESERVED) != 0) { |
414 |
puts ("Error: Bad gzipped data\n");
|
415 |
return -1; |
416 |
} |
417 |
if ((flags & EXTRA_FIELD) != 0) |
418 |
i = 12 + src[10] + (src[11] << 8); |
419 |
if ((flags & ORIG_NAME) != 0) |
420 |
while (src[i++] != 0) |
421 |
; |
422 |
if ((flags & COMMENT) != 0) |
423 |
while (src[i++] != 0) |
424 |
; |
425 |
if ((flags & HEAD_CRC) != 0) |
426 |
i += 2;
|
427 |
if (i >= srclen) {
|
428 |
puts ("Error: gunzip out of data in header\n");
|
429 |
return -1; |
430 |
} |
431 |
|
432 |
s.zalloc = zalloc; |
433 |
s.zfree = (free_func)zfree; |
434 |
|
435 |
r = inflateInit2(&s, -MAX_WBITS); |
436 |
if (r != Z_OK) {
|
437 |
printf ("Error: inflateInit2() returned %d\n", r);
|
438 |
return (-1); |
439 |
} |
440 |
s.next_in = src + i; |
441 |
s.avail_in = srclen - i; |
442 |
s.next_out = dst; |
443 |
s.avail_out = dstlen; |
444 |
r = inflate(&s, Z_FINISH); |
445 |
if (r != Z_OK && r != Z_STREAM_END) {
|
446 |
printf ("Error: inflate() returned %d\n", r);
|
447 |
return -1; |
448 |
} |
449 |
dstbytes = s.next_out - (unsigned char *) dst; |
450 |
inflateEnd(&s); |
451 |
|
452 |
return dstbytes;
|
453 |
} |
454 |
|
455 |
/* Load a U-Boot image. */
|
456 |
int load_uimage(const char *filename, target_ulong *ep, target_ulong *loadaddr, |
457 |
int *is_linux)
|
458 |
{ |
459 |
int fd;
|
460 |
int size;
|
461 |
uboot_image_header_t h; |
462 |
uboot_image_header_t *hdr = &h; |
463 |
uint8_t *data = NULL;
|
464 |
int ret = -1; |
465 |
|
466 |
fd = open(filename, O_RDONLY | O_BINARY); |
467 |
if (fd < 0) |
468 |
return -1; |
469 |
|
470 |
size = read(fd, hdr, sizeof(uboot_image_header_t));
|
471 |
if (size < 0) |
472 |
goto out;
|
473 |
|
474 |
bswap_uboot_header(hdr); |
475 |
|
476 |
if (hdr->ih_magic != IH_MAGIC)
|
477 |
goto out;
|
478 |
|
479 |
/* TODO: Implement other image types. */
|
480 |
if (hdr->ih_type != IH_TYPE_KERNEL) {
|
481 |
fprintf(stderr, "Can only load u-boot image type \"kernel\"\n");
|
482 |
goto out;
|
483 |
} |
484 |
|
485 |
switch (hdr->ih_comp) {
|
486 |
case IH_COMP_NONE:
|
487 |
case IH_COMP_GZIP:
|
488 |
break;
|
489 |
default:
|
490 |
fprintf(stderr, |
491 |
"Unable to load u-boot images with compression type %d\n",
|
492 |
hdr->ih_comp); |
493 |
goto out;
|
494 |
} |
495 |
|
496 |
/* TODO: Check CPU type. */
|
497 |
if (is_linux) {
|
498 |
if (hdr->ih_os == IH_OS_LINUX)
|
499 |
*is_linux = 1;
|
500 |
else
|
501 |
*is_linux = 0;
|
502 |
} |
503 |
|
504 |
*ep = hdr->ih_ep; |
505 |
data = qemu_malloc(hdr->ih_size); |
506 |
|
507 |
if (read(fd, data, hdr->ih_size) != hdr->ih_size) {
|
508 |
fprintf(stderr, "Error reading file\n");
|
509 |
goto out;
|
510 |
} |
511 |
|
512 |
if (hdr->ih_comp == IH_COMP_GZIP) {
|
513 |
uint8_t *compressed_data; |
514 |
size_t max_bytes; |
515 |
ssize_t bytes; |
516 |
|
517 |
compressed_data = data; |
518 |
max_bytes = UBOOT_MAX_GUNZIP_BYTES; |
519 |
data = qemu_malloc(max_bytes); |
520 |
|
521 |
bytes = gunzip(data, max_bytes, compressed_data, hdr->ih_size); |
522 |
qemu_free(compressed_data); |
523 |
if (bytes < 0) { |
524 |
fprintf(stderr, "Unable to decompress gzipped image!\n");
|
525 |
goto out;
|
526 |
} |
527 |
hdr->ih_size = bytes; |
528 |
} |
529 |
|
530 |
cpu_physical_memory_write_rom(hdr->ih_load, data, hdr->ih_size); |
531 |
|
532 |
if (loadaddr)
|
533 |
*loadaddr = hdr->ih_load; |
534 |
|
535 |
ret = hdr->ih_size; |
536 |
|
537 |
out:
|
538 |
if (data)
|
539 |
qemu_free(data); |
540 |
close(fd); |
541 |
return ret;
|
542 |
} |