265ca29a71
Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5761 c046a42c-6fe2-441c-8c8c-71466251a162
412 lines
10 KiB
C
412 lines
10 KiB
C
/*
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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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#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"
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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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/* 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;
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}
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close(fd);
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return size;
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}
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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;
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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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if (did != want) break;
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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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}
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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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/* 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;
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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;
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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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}
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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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f = fopen(filename, "rb");
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if (!f) return -1;
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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);
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return got;
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}
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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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{
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static const uint8_t nul_byte = 0;
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const char *nulp;
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if (buf_size <= 0) return;
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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);
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bswap32s(&e->a_data);
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bswap32s(&e->a_bss);
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bswap32s(&e->a_syms);
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bswap32s(&e->a_entry);
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bswap32s(&e->a_trsize);
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bswap32s(&e->a_drsize);
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}
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#else
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#define bswap_ahdr(x) do { } while (0)
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#endif
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#define N_MAGIC(exec) ((exec).a_info & 0xffff)
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#define OMAGIC 0407
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#define NMAGIC 0410
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#define ZMAGIC 0413
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#define QMAGIC 0314
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#define _N_HDROFF(x) (1024 - sizeof (struct exec))
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#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_DATOFF(x) (N_TXTOFF(x) + (x).a_text)
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#define _N_SEGMENT_ROUND(x) (((x) + TARGET_PAGE_SIZE - 1) & ~(TARGET_PAGE_SIZE - 1))
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#define _N_TXTENDADDR(x) (N_TXTADDR(x)+(x).a_text)
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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))))
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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);
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if (fd < 0)
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return -1;
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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);
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magic = N_MAGIC(e);
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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);
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size = read_targphys(fd, addr, e.a_text + e.a_data);
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if (size < 0)
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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);
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if (size < 0)
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goto fail;
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ret = read_targphys(fd, addr + N_DATADDR(e), e.a_data);
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if (ret < 0)
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goto fail;
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size += ret;
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break;
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default:
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goto fail;
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}
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close(fd);
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return size;
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fail:
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close(fd);
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return -1;
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}
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/* ELF loader */
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static void *load_at(int fd, int offset, int size)
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{
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void *ptr;
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if (lseek(fd, offset, SEEK_SET) < 0)
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return NULL;
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ptr = qemu_malloc(size);
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if (!ptr)
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return NULL;
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if (read(fd, ptr, size) != size) {
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qemu_free(ptr);
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return NULL;
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}
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return ptr;
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}
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#define ELF_CLASS ELFCLASS32
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#include "elf.h"
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#define SZ 32
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#define elf_word uint32_t
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#define elf_sword int32_t
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#define bswapSZs bswap32s
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#include "elf_ops.h"
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#undef elfhdr
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#undef elf_phdr
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#undef elf_shdr
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#undef elf_sym
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#undef elf_note
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#undef elf_word
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#undef elf_sword
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#undef bswapSZs
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#undef SZ
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#define elfhdr elf64_hdr
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#define elf_phdr elf64_phdr
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#define elf_note elf64_note
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#define elf_shdr elf64_shdr
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#define elf_sym elf64_sym
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#define elf_word uint64_t
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#define elf_sword int64_t
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#define bswapSZs bswap64s
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#define SZ 64
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#include "elf_ops.h"
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/* return < 0 if error, otherwise the number of bytes loaded in memory */
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int load_elf(const char *filename, int64_t address_offset,
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uint64_t *pentry, uint64_t *lowaddr, uint64_t *highaddr)
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{
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int fd, data_order, host_data_order, must_swab, ret;
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uint8_t e_ident[EI_NIDENT];
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fd = open(filename, O_RDONLY | O_BINARY);
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if (fd < 0) {
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perror(filename);
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return -1;
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}
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if (read(fd, e_ident, sizeof(e_ident)) != sizeof(e_ident))
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goto fail;
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if (e_ident[0] != ELFMAG0 ||
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e_ident[1] != ELFMAG1 ||
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e_ident[2] != ELFMAG2 ||
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e_ident[3] != ELFMAG3)
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goto fail;
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#ifdef WORDS_BIGENDIAN
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data_order = ELFDATA2MSB;
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#else
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data_order = ELFDATA2LSB;
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#endif
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must_swab = data_order != e_ident[EI_DATA];
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#ifdef TARGET_WORDS_BIGENDIAN
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host_data_order = ELFDATA2MSB;
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#else
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host_data_order = ELFDATA2LSB;
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#endif
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if (host_data_order != e_ident[EI_DATA])
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return -1;
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lseek(fd, 0, SEEK_SET);
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if (e_ident[EI_CLASS] == ELFCLASS64) {
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ret = load_elf64(fd, address_offset, must_swab, pentry,
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lowaddr, highaddr);
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} else {
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ret = load_elf32(fd, address_offset, must_swab, pentry,
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lowaddr, highaddr);
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}
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close(fd);
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return ret;
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fail:
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close(fd);
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return -1;
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}
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static void bswap_uboot_header(uboot_image_header_t *hdr)
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{
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#ifndef WORDS_BIGENDIAN
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bswap32s(&hdr->ih_magic);
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bswap32s(&hdr->ih_hcrc);
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bswap32s(&hdr->ih_time);
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bswap32s(&hdr->ih_size);
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bswap32s(&hdr->ih_load);
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bswap32s(&hdr->ih_ep);
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bswap32s(&hdr->ih_dcrc);
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#endif
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}
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/* Load a U-Boot image. */
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int load_uboot(const char *filename, target_ulong *ep, int *is_linux)
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{
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int fd;
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int size;
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uboot_image_header_t h;
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uboot_image_header_t *hdr = &h;
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uint8_t *data = NULL;
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int ret = -1;
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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 = read(fd, hdr, sizeof(uboot_image_header_t));
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if (size < 0)
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goto out;
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bswap_uboot_header(hdr);
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if (hdr->ih_magic != IH_MAGIC)
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goto out;
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/* TODO: Implement Multi-File images. */
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if (hdr->ih_type == IH_TYPE_MULTI) {
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fprintf(stderr, "Unable to load multi-file u-boot images\n");
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goto out;
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}
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/* TODO: Implement compressed images. */
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if (hdr->ih_comp != IH_COMP_NONE) {
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fprintf(stderr, "Unable to load compressed u-boot images\n");
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goto out;
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}
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/* TODO: Check CPU type. */
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if (is_linux) {
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if (hdr->ih_type == IH_TYPE_KERNEL && hdr->ih_os == IH_OS_LINUX)
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*is_linux = 1;
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else
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*is_linux = 0;
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}
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*ep = hdr->ih_ep;
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data = qemu_malloc(hdr->ih_size);
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if (!data)
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goto out;
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if (read(fd, data, hdr->ih_size) != hdr->ih_size) {
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fprintf(stderr, "Error reading file\n");
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goto out;
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}
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cpu_physical_memory_write_rom(hdr->ih_load, data, hdr->ih_size);
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ret = hdr->ih_size;
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out:
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if (data)
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qemu_free(data);
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close(fd);
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return ret;
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}
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