/* * 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. */#include "qemu-common.h"#include "disas.h"#include "sysemu.h"#include "uboot_image.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 */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;}/* 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_NEEDEDstatic 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_DATOFF(x) (N_TXTOFF(x) + (x).a_text)#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, uint8_t *addr){    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:	lseek(fd, N_TXTOFF(e), SEEK_SET);	size = read(fd, addr, e.a_text + e.a_data);	if (size < 0)	    goto fail;	break;    case NMAGIC:	lseek(fd, N_TXTOFF(e), SEEK_SET);	size = read(fd, addr, e.a_text);	if (size < 0)	    goto fail;	ret = read(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 (!ptr)        return NULL;    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 virt_to_phys_addend,             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, virt_to_phys_addend, must_swab, pentry,                         lowaddr, highaddr);    } else {        ret = load_elf32(fd, virt_to_phys_addend, 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}/* Load a U-Boot image.  */int load_uboot(const char *filename, target_ulong *ep, int *is_linux){    int fd;    int size;    uboot_image_header_t h;    uboot_image_header_t *hdr = &h;    uint8_t *data = NULL;    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 fail;    bswap_uboot_header(hdr);    if (hdr->ih_magic != IH_MAGIC)        goto fail;    /* TODO: Implement Multi-File images.  */    if (hdr->ih_type == IH_TYPE_MULTI) {        fprintf(stderr, "Unable to load multi-file u-boot images\n");        goto fail;    }    /* TODO: Implement compressed images.  */    if (hdr->ih_comp != IH_COMP_NONE) {        fprintf(stderr, "Unable to load compressed u-boot images\n");        goto fail;    }    /* TODO: Check CPU type.  */    if (is_linux) {        if (hdr->ih_type == IH_TYPE_KERNEL && hdr->ih_os == IH_OS_LINUX)            *is_linux = 1;        else            *is_linux = 0;    }    *ep = hdr->ih_ep;    data = qemu_malloc(hdr->ih_size);    if (!data)        goto fail;    if (read(fd, data, hdr->ih_size) != hdr->ih_size) {        fprintf(stderr, "Error reading file\n");        goto fail;    }    cpu_physical_memory_write_rom(hdr->ih_load, data, hdr->ih_size);    return hdr->ih_size;fail:    if (data)        qemu_free(data);    close(fd);    return -1;}