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 #include "qemu-common.h"
27 #include "uboot_image.h"
29 /* return the size or -1 if error */
30 int get_image_size(const char *filename)
33 fd = open(filename, O_RDONLY | O_BINARY);
36 size = lseek(fd, 0, SEEK_END);
41 /* return the size or -1 if error */
42 /* deprecated, because caller does not specify buffer size! */
43 int load_image(const char *filename, uint8_t *addr)
46 fd = open(filename, O_RDONLY | O_BINARY);
49 size = lseek(fd, 0, SEEK_END);
50 lseek(fd, 0, SEEK_SET);
51 if (read(fd, addr, size) != size) {
59 /* return the amount read, just like fread. 0 may mean error or eof */
60 int fread_targphys(target_phys_addr_t dst_addr, size_t nbytes, FILE *f)
63 target_phys_addr_t dst_begin = dst_addr;
67 want = nbytes > sizeof(buf) ? sizeof(buf) : nbytes;
68 did = fread(buf, 1, want, f);
69 if (did != want) break;
71 cpu_physical_memory_write_rom(dst_addr, buf, did);
75 return dst_addr - dst_begin;
78 /* returns 0 on error, 1 if ok */
79 int fread_targphys_ok(target_phys_addr_t dst_addr, size_t nbytes, FILE *f)
81 return fread_targphys(dst_addr, nbytes, f) == nbytes;
84 /* read()-like version */
85 int read_targphys(int fd, target_phys_addr_t dst_addr, size_t nbytes)
88 target_phys_addr_t dst_begin = dst_addr;
92 want = nbytes > sizeof(buf) ? sizeof(buf) : nbytes;
93 did = read(fd, buf, want);
94 if (did != want) break;
96 cpu_physical_memory_write_rom(dst_addr, buf, did);
100 return dst_addr - dst_begin;
103 /* return the size or -1 if error */
104 int load_image_targphys(const char *filename,
105 target_phys_addr_t addr, int max_sz)
110 f = fopen(filename, "rb");
113 got = fread_targphys(addr, max_sz, f);
114 if (ferror(f)) { fclose(f); return -1; }
120 void pstrcpy_targphys(target_phys_addr_t dest, int buf_size,
123 static const uint8_t nul_byte = 0;
126 if (buf_size <= 0) return;
127 nulp = memchr(source, 0, buf_size);
129 cpu_physical_memory_write_rom(dest, (uint8_t *)source,
130 (nulp - source) + 1);
132 cpu_physical_memory_write_rom(dest, (uint8_t *)source, buf_size - 1);
133 cpu_physical_memory_write_rom(dest, &nul_byte, 1);
141 uint32_t a_info; /* Use macros N_MAGIC, etc for access */
142 uint32_t a_text; /* length of text, in bytes */
143 uint32_t a_data; /* length of data, in bytes */
144 uint32_t a_bss; /* length of uninitialized data area, in bytes */
145 uint32_t a_syms; /* length of symbol table data in file, in bytes */
146 uint32_t a_entry; /* start address */
147 uint32_t a_trsize; /* length of relocation info for text, in bytes */
148 uint32_t a_drsize; /* length of relocation info for data, in bytes */
152 static void bswap_ahdr(struct exec *e)
154 bswap32s(&e->a_info);
155 bswap32s(&e->a_text);
156 bswap32s(&e->a_data);
158 bswap32s(&e->a_syms);
159 bswap32s(&e->a_entry);
160 bswap32s(&e->a_trsize);
161 bswap32s(&e->a_drsize);
164 #define bswap_ahdr(x) do { } while (0)
167 #define N_MAGIC(exec) ((exec).a_info & 0xffff)
172 #define _N_HDROFF(x) (1024 - sizeof (struct exec))
173 #define N_TXTOFF(x) \
174 (N_MAGIC(x) == ZMAGIC ? _N_HDROFF((x)) + sizeof (struct exec) : \
175 (N_MAGIC(x) == QMAGIC ? 0 : sizeof (struct exec)))
176 #define N_TXTADDR(x) (N_MAGIC(x) == QMAGIC ? TARGET_PAGE_SIZE : 0)
177 #define N_DATOFF(x) (N_TXTOFF(x) + (x).a_text)
178 #define _N_SEGMENT_ROUND(x) (((x) + TARGET_PAGE_SIZE - 1) & ~(TARGET_PAGE_SIZE - 1))
180 #define _N_TXTENDADDR(x) (N_TXTADDR(x)+(x).a_text)
182 #define N_DATADDR(x) \
183 (N_MAGIC(x)==OMAGIC? (_N_TXTENDADDR(x)) \
184 : (_N_SEGMENT_ROUND (_N_TXTENDADDR(x))))
187 int load_aout(const char *filename, target_phys_addr_t addr, int max_sz)
193 fd = open(filename, O_RDONLY | O_BINARY);
197 size = read(fd, &e, sizeof(e));
208 if (e.a_text + e.a_data > max_sz)
210 lseek(fd, N_TXTOFF(e), SEEK_SET);
211 size = read_targphys(fd, addr, e.a_text + e.a_data);
216 if (N_DATADDR(e) + e.a_data > max_sz)
218 lseek(fd, N_TXTOFF(e), SEEK_SET);
219 size = read_targphys(fd, addr, e.a_text);
222 ret = read_targphys(fd, addr + N_DATADDR(e), e.a_data);
239 static void *load_at(int fd, int offset, int size)
242 if (lseek(fd, offset, SEEK_SET) < 0)
244 ptr = qemu_malloc(size);
247 if (read(fd, ptr, size) != size) {
255 #define ELF_CLASS ELFCLASS32
259 #define elf_word uint32_t
260 #define elf_sword int32_t
261 #define bswapSZs bswap32s
273 #define elfhdr elf64_hdr
274 #define elf_phdr elf64_phdr
275 #define elf_note elf64_note
276 #define elf_shdr elf64_shdr
277 #define elf_sym elf64_sym
278 #define elf_word uint64_t
279 #define elf_sword int64_t
280 #define bswapSZs bswap64s
284 /* return < 0 if error, otherwise the number of bytes loaded in memory */
285 int load_elf(const char *filename, int64_t virt_to_phys_addend,
286 uint64_t *pentry, uint64_t *lowaddr, uint64_t *highaddr)
288 int fd, data_order, host_data_order, must_swab, ret;
289 uint8_t e_ident[EI_NIDENT];
291 fd = open(filename, O_RDONLY | O_BINARY);
296 if (read(fd, e_ident, sizeof(e_ident)) != sizeof(e_ident))
298 if (e_ident[0] != ELFMAG0 ||
299 e_ident[1] != ELFMAG1 ||
300 e_ident[2] != ELFMAG2 ||
301 e_ident[3] != ELFMAG3)
303 #ifdef WORDS_BIGENDIAN
304 data_order = ELFDATA2MSB;
306 data_order = ELFDATA2LSB;
308 must_swab = data_order != e_ident[EI_DATA];
310 #ifdef TARGET_WORDS_BIGENDIAN
311 host_data_order = ELFDATA2MSB;
313 host_data_order = ELFDATA2LSB;
315 if (host_data_order != e_ident[EI_DATA])
318 lseek(fd, 0, SEEK_SET);
319 if (e_ident[EI_CLASS] == ELFCLASS64) {
320 ret = load_elf64(fd, virt_to_phys_addend, must_swab, pentry,
323 ret = load_elf32(fd, virt_to_phys_addend, must_swab, pentry,
335 static void bswap_uboot_header(uboot_image_header_t *hdr)
337 #ifndef WORDS_BIGENDIAN
338 bswap32s(&hdr->ih_magic);
339 bswap32s(&hdr->ih_hcrc);
340 bswap32s(&hdr->ih_time);
341 bswap32s(&hdr->ih_size);
342 bswap32s(&hdr->ih_load);
343 bswap32s(&hdr->ih_ep);
344 bswap32s(&hdr->ih_dcrc);
348 /* Load a U-Boot image. */
349 int load_uboot(const char *filename, target_ulong *ep, int *is_linux)
354 uboot_image_header_t h;
355 uboot_image_header_t *hdr = &h;
356 uint8_t *data = NULL;
358 fd = open(filename, O_RDONLY | O_BINARY);
362 size = read(fd, hdr, sizeof(uboot_image_header_t));
366 bswap_uboot_header(hdr);
368 if (hdr->ih_magic != IH_MAGIC)
371 /* TODO: Implement Multi-File images. */
372 if (hdr->ih_type == IH_TYPE_MULTI) {
373 fprintf(stderr, "Unable to load multi-file u-boot images\n");
377 /* TODO: Implement compressed images. */
378 if (hdr->ih_comp != IH_COMP_NONE) {
379 fprintf(stderr, "Unable to load compressed u-boot images\n");
383 /* TODO: Check CPU type. */
385 if (hdr->ih_type == IH_TYPE_KERNEL && hdr->ih_os == IH_OS_LINUX)
392 data = qemu_malloc(hdr->ih_size);
396 if (read(fd, data, hdr->ih_size) != hdr->ih_size) {
397 fprintf(stderr, "Error reading file\n");
401 cpu_physical_memory_write_rom(hdr->ih_load, data, hdr->ih_size);