git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1831 c046a42c-6fe2-441c-8c8c-71466251a162
235 lines
5.9 KiB
C
235 lines
5.9 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 "vl.h"
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#include "disas.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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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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/* 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, uint8_t *addr)
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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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lseek(fd, N_TXTOFF(e), SEEK_SET);
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size = read(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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lseek(fd, N_TXTOFF(e), SEEK_SET);
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size = read(fd, addr, e.a_text);
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if (size < 0)
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goto fail;
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ret = read(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 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 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 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 virt_to_phys_addend)
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{
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int fd, data_order, must_swab, ret;
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uint8_t e_ident[EI_NIDENT];
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fd = open(filename, O_RDONLY);
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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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lseek(fd, 0, SEEK_SET);
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if (e_ident[EI_CLASS] == ELFCLASS64) {
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ret = load_elf64(fd, virt_to_phys_addend, must_swab);
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} else {
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ret = load_elf32(fd, virt_to_phys_addend, must_swab);
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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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