[mirror_qemu.git] / loader.c

/*
 * 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.
 *
 * Gunzip functionality in this file is derived from u-boot:
 *
 * (C) Copyright 2008 Semihalf
 *
 * (C) Copyright 2000-2005
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#include "qemu-common.h"
#include "disas.h"
#include "sysemu.h"
#include "uboot_image.h"

#include <zlib.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 */
/* deprecated, because caller does not specify buffer size! */
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;
}

/* return the amount read, just like fread.  0 may mean error or eof */
int fread_targphys(target_phys_addr_t dst_addr, size_t nbytes, FILE *f)
{
    uint8_t buf[4096];
    target_phys_addr_t dst_begin = dst_addr;
    size_t want, did;

    while (nbytes) {
	want = nbytes > sizeof(buf) ? sizeof(buf) : nbytes;
	did = fread(buf, 1, want, f);
	if (did != want) break;

	cpu_physical_memory_write_rom(dst_addr, buf, did);
	dst_addr += did;
	nbytes -= did;
    }
    return dst_addr - dst_begin;
}

/* returns 0 on error, 1 if ok */
int fread_targphys_ok(target_phys_addr_t dst_addr, size_t nbytes, FILE *f)
{
    return fread_targphys(dst_addr, nbytes, f) == nbytes;
}

/* read()-like version */
int read_targphys(int fd, target_phys_addr_t dst_addr, size_t nbytes)
{
    uint8_t buf[4096];
    target_phys_addr_t dst_begin = dst_addr;
    size_t want, did;

    while (nbytes) {
	want = nbytes > sizeof(buf) ? sizeof(buf) : nbytes;
	did = read(fd, buf, want);
	if (did != want) break;

	cpu_physical_memory_write_rom(dst_addr, buf, did);
	dst_addr += did;
	nbytes -= did;
    }
    return dst_addr - dst_begin;
}

/* return the size or -1 if error */
int load_image_targphys(const char *filename,
			target_phys_addr_t addr, int max_sz)
{
    FILE *f;
    size_t got;

    f = fopen(filename, "rb");
    if (!f) return -1;

    got = fread_targphys(addr, max_sz, f);
    if (ferror(f)) { fclose(f); return -1; }
    fclose(f);

    return got;
}

void pstrcpy_targphys(target_phys_addr_t dest, int buf_size,
                      const char *source)
{
    static const uint8_t nul_byte = 0;
    const char *nulp;

    if (buf_size <= 0) return;
    nulp = memchr(source, 0, buf_size);
    if (nulp) {
	cpu_physical_memory_write_rom(dest, (uint8_t *)source,
                                      (nulp - source) + 1);
    } else {
	cpu_physical_memory_write_rom(dest, (uint8_t *)source, buf_size - 1);
	cpu_physical_memory_write_rom(dest, &nul_byte, 1);
    }
}

/* 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_NEEDED
static 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, target_phys_addr_t addr, int max_sz)
{
    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:
        if (e.a_text + e.a_data > max_sz)
            goto fail;
	lseek(fd, N_TXTOFF(e), SEEK_SET);
	size = read_targphys(fd, addr, e.a_text + e.a_data);
	if (size < 0)
	    goto fail;
	break;
    case NMAGIC:
        if (N_DATADDR(e) + e.a_data > max_sz)
            goto fail;
	lseek(fd, N_TXTOFF(e), SEEK_SET);
	size = read_targphys(fd, addr, e.a_text);
	if (size < 0)
	    goto fail;
	ret = read_targphys(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 address_offset,
             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, address_offset, must_swab, pentry,
                         lowaddr, highaddr);
    } else {
        ret = load_elf32(fd, address_offset, 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
}


#define ZALLOC_ALIGNMENT	16

static void *zalloc(void *x, unsigned items, unsigned size)
{
    void *p;

    size *= items;
    size = (size + ZALLOC_ALIGNMENT - 1) & ~(ZALLOC_ALIGNMENT - 1);

    p = qemu_malloc(size);

    return (p);
}

static void zfree(void *x, void *addr, unsigned nb)
{
    qemu_free(addr);
}


#define HEAD_CRC	2
#define EXTRA_FIELD	4
#define ORIG_NAME	8
#define COMMENT		0x10
#define RESERVED	0xe0

#define DEFLATED	8

/* This is the maximum in uboot, so if a uImage overflows this, it would
 * overflow on real hardware too. */
#define UBOOT_MAX_GUNZIP_BYTES 0x800000

static ssize_t gunzip(void *dst, size_t dstlen, uint8_t *src,
                      size_t srclen)
{
    z_stream s;
    ssize_t dstbytes;
    int r, i, flags;

    /* skip header */
    i = 10;
    flags = src[3];
    if (src[2] != DEFLATED || (flags & RESERVED) != 0) {
        puts ("Error: Bad gzipped data\n");
        return -1;
    }
    if ((flags & EXTRA_FIELD) != 0)
        i = 12 + src[10] + (src[11] << 8);
    if ((flags & ORIG_NAME) != 0)
        while (src[i++] != 0)
            ;
    if ((flags & COMMENT) != 0)
        while (src[i++] != 0)
            ;
    if ((flags & HEAD_CRC) != 0)
        i += 2;
    if (i >= srclen) {
        puts ("Error: gunzip out of data in header\n");
        return -1;
    }

    s.zalloc = zalloc;
    s.zfree = (free_func)zfree;

    r = inflateInit2(&s, -MAX_WBITS);
    if (r != Z_OK) {
        printf ("Error: inflateInit2() returned %d\n", r);
        return (-1);
    }
    s.next_in = src + i;
    s.avail_in = srclen - i;
    s.next_out = dst;
    s.avail_out = dstlen;
    r = inflate(&s, Z_FINISH);
    if (r != Z_OK && r != Z_STREAM_END) {
        printf ("Error: inflate() returned %d\n", r);
        return -1;
    }
    dstbytes = s.next_out - (unsigned char *) dst;
    inflateEnd(&s);

    return dstbytes;
}

/* Load a U-Boot image.  */
int load_uimage(const char *filename, target_ulong *ep, target_ulong *loadaddr,
                int *is_linux)
{
    int fd;
    int size;
    uboot_image_header_t h;
    uboot_image_header_t *hdr = &h;
    uint8_t *data = NULL;
    int ret = -1;

    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 out;

    bswap_uboot_header(hdr);

    if (hdr->ih_magic != IH_MAGIC)
        goto out;

    /* TODO: Implement other image types.  */
    if (hdr->ih_type != IH_TYPE_KERNEL) {
        fprintf(stderr, "Can only load u-boot image type \"kernel\"\n");
        goto out;
    }

    switch (hdr->ih_comp) {
    case IH_COMP_NONE:
    case IH_COMP_GZIP:
        break;
    default:
        fprintf(stderr,
                "Unable to load u-boot images with compression type %d\n",
                hdr->ih_comp);
        goto out;
    }

    /* TODO: Check CPU type.  */
    if (is_linux) {
        if (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 out;

    if (read(fd, data, hdr->ih_size) != hdr->ih_size) {
        fprintf(stderr, "Error reading file\n");
        goto out;
    }

    if (hdr->ih_comp == IH_COMP_GZIP) {
        uint8_t *compressed_data;
        size_t max_bytes;
        ssize_t bytes;

        compressed_data = data;
        max_bytes = UBOOT_MAX_GUNZIP_BYTES;
        data = qemu_malloc(max_bytes);

        bytes = gunzip(data, max_bytes, compressed_data, hdr->ih_size);
        qemu_free(compressed_data);
        if (bytes < 0) {
            fprintf(stderr, "Unable to decompress gzipped image!\n");
            goto out;
        }
        hdr->ih_size = bytes;
    }

    cpu_physical_memory_write_rom(hdr->ih_load, data, hdr->ih_size);

    if (loadaddr)
        *loadaddr = hdr->ih_load;

    ret = hdr->ih_size;

out:
    if (data)
        qemu_free(data);
    close(fd);
    return ret;
}
Commit	Line	Data
5fe141fd FB	1	/*
5fe141fd FB	2	* QEMU Executable loader
5fafdf24	3	*
5fe141fd	4	* Copyright (c) 2006 Fabrice Bellard
5fafdf24	5	*
5fe141fd FB	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:
	12	*
	13	* The above copyright notice and this permission notice shall be included in
	14	* all copies or substantial portions of the Software.
	15	*
	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
	22	* THE SOFTWARE.
5a123577 AL	23	*
	24	* Gunzip functionality in this file is derived from u-boot:
	25	*
	26	* (C) Copyright 2008 Semihalf
	27	*
	28	* (C) Copyright 2000-2005
	29	* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
	30	*
	31	* This program is free software; you can redistribute it and/or
	32	* modify it under the terms of the GNU General Public License as
	33	* published by the Free Software Foundation; either version 2 of
	34	* the License, or (at your option) any later version.
	35	*
	36	* This program is distributed in the hope that it will be useful,
	37	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	38	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	39	* GNU General Public License for more details.
	40	*
fad6cb1a AJ	41	* You should have received a copy of the GNU General Public License along
	42	* with this program; if not, write to the Free Software Foundation, Inc.,
	43	* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
5fe141fd	44	*/
5a123577	45
87ecb68b	46	#include "qemu-common.h"
5fe141fd	47	#include "disas.h"
9596ebb7	48	#include "sysemu.h"
1c7b3754	49	#include "uboot_image.h"
5fe141fd	50
5a123577 AL	51	#include <zlib.h>
5a123577 AL	52
5fe141fd FB	53	/* return the size or -1 if error */
	54	int get_image_size(const char *filename)
	55	{
	56	int fd, size;
	57	fd = open(filename, O_RDONLY \| O_BINARY);
	58	if (fd < 0)
	59	return -1;
	60	size = lseek(fd, 0, SEEK_END);
	61	close(fd);
	62	return size;
	63	}
	64
	65	/* return the size or -1 if error */
293f78bc	66	/* deprecated, because caller does not specify buffer size! */
5fe141fd FB	67	int load_image(const char filename, uint8_t addr)
	68	{
	69	int fd, size;
	70	fd = open(filename, O_RDONLY \| O_BINARY);
	71	if (fd < 0)
	72	return -1;
	73	size = lseek(fd, 0, SEEK_END);
	74	lseek(fd, 0, SEEK_SET);
	75	if (read(fd, addr, size) != size) {
	76	close(fd);
	77	return -1;
	78	}
	79	close(fd);
	80	return size;
	81	}
	82
293f78bc BS	83	/* return the amount read, just like fread. 0 may mean error or eof */
	84	int fread_targphys(target_phys_addr_t dst_addr, size_t nbytes, FILE *f)
	85	{
	86	uint8_t buf[4096];
	87	target_phys_addr_t dst_begin = dst_addr;
	88	size_t want, did;
	89
	90	while (nbytes) {
	91	want = nbytes > sizeof(buf) ? sizeof(buf) : nbytes;
	92	did = fread(buf, 1, want, f);
	93	if (did != want) break;
	94
	95	cpu_physical_memory_write_rom(dst_addr, buf, did);
	96	dst_addr += did;
	97	nbytes -= did;
	98	}
	99	return dst_addr - dst_begin;
	100	}
	101
	102	/* returns 0 on error, 1 if ok */
	103	int fread_targphys_ok(target_phys_addr_t dst_addr, size_t nbytes, FILE *f)
	104	{
	105	return fread_targphys(dst_addr, nbytes, f) == nbytes;
	106	}
	107
	108	/* read()-like version */
	109	int read_targphys(int fd, target_phys_addr_t dst_addr, size_t nbytes)
	110	{
	111	uint8_t buf[4096];
	112	target_phys_addr_t dst_begin = dst_addr;
	113	size_t want, did;
	114
	115	while (nbytes) {
	116	want = nbytes > sizeof(buf) ? sizeof(buf) : nbytes;
	117	did = read(fd, buf, want);
	118	if (did != want) break;
	119
	120	cpu_physical_memory_write_rom(dst_addr, buf, did);
	121	dst_addr += did;
	122	nbytes -= did;
	123	}
	124	return dst_addr - dst_begin;
	125	}
	126
	127	/* return the size or -1 if error */
	128	int load_image_targphys(const char *filename,
	129	target_phys_addr_t addr, int max_sz)
	130	{
	131	FILE *f;
	132	size_t got;
	133
	134	f = fopen(filename, "rb");
	135	if (!f) return -1;
	136
	137	got = fread_targphys(addr, max_sz, f);
	138	if (ferror(f)) { fclose(f); return -1; }
	139	fclose(f);
	140
	141	return got;
	142	}
	143
	144	void pstrcpy_targphys(target_phys_addr_t dest, int buf_size,
	145	const char *source)
	146	{
147	static const uint8_t nul_byte = 0;
148	const char *nulp;
149
150	if (buf_size <= 0) return;
151	nulp = memchr(source, 0, buf_size);
152	if (nulp) {
153	cpu_physical_memory_write_rom(dest, (uint8_t *)source,
154	(nulp - source) + 1);
155	} else {
156	cpu_physical_memory_write_rom(dest, (uint8_t *)source, buf_size - 1);
157	cpu_physical_memory_write_rom(dest, &nul_byte, 1);
158	}
159	}
160
5fe141fd FB	161	/* A.OUT loader */
	162
	163	struct exec
	164	{
	165	uint32_t a_info; /* Use macros N_MAGIC, etc for access */
	166	uint32_t a_text; /* length of text, in bytes */
	167	uint32_t a_data; /* length of data, in bytes */
	168	uint32_t a_bss; /* length of uninitialized data area, in bytes */
	169	uint32_t a_syms; /* length of symbol table data in file, in bytes */
	170	uint32_t a_entry; /* start address */
	171	uint32_t a_trsize; /* length of relocation info for text, in bytes */
	172	uint32_t a_drsize; /* length of relocation info for data, in bytes */
	173	};
	174
	175	#ifdef BSWAP_NEEDED
	176	static void bswap_ahdr(struct exec *e)
	177	{
	178	bswap32s(&e->a_info);
	179	bswap32s(&e->a_text);
	180	bswap32s(&e->a_data);
	181	bswap32s(&e->a_bss);
	182	bswap32s(&e->a_syms);
	183	bswap32s(&e->a_entry);
	184	bswap32s(&e->a_trsize);
	185	bswap32s(&e->a_drsize);
	186	}
	187	#else
	188	#define bswap_ahdr(x) do { } while (0)
	189	#endif
	190
	191	#define N_MAGIC(exec) ((exec).a_info & 0xffff)
	192	#define OMAGIC 0407
	193	#define NMAGIC 0410
	194	#define ZMAGIC 0413
	195	#define QMAGIC 0314
	196	#define _N_HDROFF(x) (1024 - sizeof (struct exec))
	197	#define N_TXTOFF(x) \
	198	(N_MAGIC(x) == ZMAGIC ? _N_HDROFF((x)) + sizeof (struct exec) : \
	199	(N_MAGIC(x) == QMAGIC ? 0 : sizeof (struct exec)))
	200	#define N_TXTADDR(x) (N_MAGIC(x) == QMAGIC ? TARGET_PAGE_SIZE : 0)
	201	#define N_DATOFF(x) (N_TXTOFF(x) + (x).a_text)
	202	#define _N_SEGMENT_ROUND(x) (((x) + TARGET_PAGE_SIZE - 1) & ~(TARGET_PAGE_SIZE - 1))
	203
	204	#define _N_TXTENDADDR(x) (N_TXTADDR(x)+(x).a_text)
	205
	206	#define N_DATADDR(x) \
	207	(N_MAGIC(x)==OMAGIC? (_N_TXTENDADDR(x)) \
	208	: (_N_SEGMENT_ROUND (_N_TXTENDADDR(x))))
	209
	210
293f78bc	211	int load_aout(const char *filename, target_phys_addr_t addr, int max_sz)
5fe141fd FB	212	{
	213	int fd, size, ret;
	214	struct exec e;
	215	uint32_t magic;
	216
	217	fd = open(filename, O_RDONLY \| O_BINARY);
	218	if (fd < 0)
	219	return -1;
	220
	221	size = read(fd, &e, sizeof(e));
	222	if (size < 0)
	223	goto fail;
	224
	225	bswap_ahdr(&e);
	226
	227	magic = N_MAGIC(e);
	228	switch (magic) {
	229	case ZMAGIC:
	230	case QMAGIC:
	231	case OMAGIC:
293f78bc BS	232	if (e.a_text + e.a_data > max_sz)
293f78bc BS	233	goto fail;
5fe141fd	234	lseek(fd, N_TXTOFF(e), SEEK_SET);
293f78bc	235	size = read_targphys(fd, addr, e.a_text + e.a_data);
5fe141fd FB	236	if (size < 0)
	237	goto fail;
	238	break;
	239	case NMAGIC:
293f78bc BS	240	if (N_DATADDR(e) + e.a_data > max_sz)
293f78bc BS	241	goto fail;
5fe141fd	242	lseek(fd, N_TXTOFF(e), SEEK_SET);
293f78bc	243	size = read_targphys(fd, addr, e.a_text);
5fe141fd FB	244	if (size < 0)
5fe141fd FB	245	goto fail;
293f78bc	246	ret = read_targphys(fd, addr + N_DATADDR(e), e.a_data);
5fe141fd FB	247	if (ret < 0)
	248	goto fail;
	249	size += ret;
	250	break;
	251	default:
	252	goto fail;
	253	}
	254	close(fd);
	255	return size;
	256	fail:
	257	close(fd);
	258	return -1;
	259	}
	260
	261	/* ELF loader */
	262
	263	static void *load_at(int fd, int offset, int size)
	264	{
	265	void *ptr;
	266	if (lseek(fd, offset, SEEK_SET) < 0)
	267	return NULL;
	268	ptr = qemu_malloc(size);
	269	if (!ptr)
	270	return NULL;
	271	if (read(fd, ptr, size) != size) {
	272	qemu_free(ptr);
	273	return NULL;
	274	}
	275	return ptr;
	276	}
	277
	278
	279	#define ELF_CLASS ELFCLASS32
	280	#include "elf.h"
	281
	282	#define SZ 32
	283	#define elf_word uint32_t
82790064	284	#define elf_sword int32_t
5fe141fd FB	285	#define bswapSZs bswap32s
	286	#include "elf_ops.h"
	287
	288	#undef elfhdr
	289	#undef elf_phdr
	290	#undef elf_shdr
	291	#undef elf_sym
	292	#undef elf_note
	293	#undef elf_word
82790064	294	#undef elf_sword
5fe141fd FB	295	#undef bswapSZs
	296	#undef SZ
	297	#define elfhdr elf64_hdr
	298	#define elf_phdr elf64_phdr
	299	#define elf_note elf64_note
	300	#define elf_shdr elf64_shdr
	301	#define elf_sym elf64_sym
	302	#define elf_word uint64_t
82790064	303	#define elf_sword int64_t
5fe141fd FB	304	#define bswapSZs bswap64s
	305	#define SZ 64
	306	#include "elf_ops.h"
	307
	308	/* return < 0 if error, otherwise the number of bytes loaded in memory */
83c1f87c	309	int load_elf(const char *filename, int64_t address_offset,
74287114	310	uint64_t pentry, uint64_t lowaddr, uint64_t *highaddr)
5fe141fd	311	{
9042c0e2	312	int fd, data_order, host_data_order, must_swab, ret;
5fe141fd FB	313	uint8_t e_ident[EI_NIDENT];
5fe141fd FB	314
699e4642	315	fd = open(filename, O_RDONLY \| O_BINARY);
5fe141fd FB	316	if (fd < 0) {
	317	perror(filename);
	318	return -1;
	319	}
	320	if (read(fd, e_ident, sizeof(e_ident)) != sizeof(e_ident))
	321	goto fail;
	322	if (e_ident[0] != ELFMAG0 \|\|
	323	e_ident[1] != ELFMAG1 \|\|
	324	e_ident[2] != ELFMAG2 \|\|
	325	e_ident[3] != ELFMAG3)
	326	goto fail;
	327	#ifdef WORDS_BIGENDIAN
	328	data_order = ELFDATA2MSB;
	329	#else
	330	data_order = ELFDATA2LSB;
	331	#endif
	332	must_swab = data_order != e_ident[EI_DATA];
9042c0e2 TS	333
	334	#ifdef TARGET_WORDS_BIGENDIAN
	335	host_data_order = ELFDATA2MSB;
	336	#else
	337	host_data_order = ELFDATA2LSB;
	338	#endif
	339	if (host_data_order != e_ident[EI_DATA])
	340	return -1;
	341
5fe141fd FB	342	lseek(fd, 0, SEEK_SET);
5fe141fd FB	343	if (e_ident[EI_CLASS] == ELFCLASS64) {
83c1f87c	344	ret = load_elf64(fd, address_offset, must_swab, pentry,
74287114	345	lowaddr, highaddr);
5fe141fd	346	} else {
83c1f87c	347	ret = load_elf32(fd, address_offset, must_swab, pentry,
74287114	348	lowaddr, highaddr);
5fe141fd FB	349	}
	350
	351	close(fd);
	352	return ret;
	353
	354	fail:
	355	close(fd);
	356	return -1;
	357	}
1c7b3754 PB	358
	359	static void bswap_uboot_header(uboot_image_header_t *hdr)
	360	{
	361	#ifndef WORDS_BIGENDIAN
	362	bswap32s(&hdr->ih_magic);
	363	bswap32s(&hdr->ih_hcrc);
	364	bswap32s(&hdr->ih_time);
	365	bswap32s(&hdr->ih_size);
	366	bswap32s(&hdr->ih_load);
	367	bswap32s(&hdr->ih_ep);
	368	bswap32s(&hdr->ih_dcrc);
	369	#endif
	370	}
	371
5a123577 AL	372
	373	#define ZALLOC_ALIGNMENT 16
	374
	375	static void zalloc(void x, unsigned items, unsigned size)
	376	{
	377	void *p;
	378
	379	size *= items;
	380	size = (size + ZALLOC_ALIGNMENT - 1) & ~(ZALLOC_ALIGNMENT - 1);
	381
	382	p = qemu_malloc(size);
	383
	384	return (p);
	385	}
	386
	387	static void zfree(void x, void addr, unsigned nb)
	388	{
	389	qemu_free(addr);
	390	}
	391
	392
	393	#define HEAD_CRC 2
	394	#define EXTRA_FIELD 4
	395	#define ORIG_NAME 8
	396	#define COMMENT 0x10
	397	#define RESERVED 0xe0
	398
	399	#define DEFLATED 8
	400
	401	/* This is the maximum in uboot, so if a uImage overflows this, it would
	402	* overflow on real hardware too. */
	403	#define UBOOT_MAX_GUNZIP_BYTES 0x800000
	404
	405	static ssize_t gunzip(void dst, size_t dstlen, uint8_t src,
	406	size_t srclen)
	407	{
	408	z_stream s;
	409	ssize_t dstbytes;
	410	int r, i, flags;
	411
	412	/* skip header */
	413	i = 10;
	414	flags = src[3];
	415	if (src[2] != DEFLATED \|\| (flags & RESERVED) != 0) {
	416	puts ("Error: Bad gzipped data\n");
	417	return -1;
	418	}
	419	if ((flags & EXTRA_FIELD) != 0)
	420	i = 12 + src[10] + (src[11] << 8);
	421	if ((flags & ORIG_NAME) != 0)
	422	while (src[i++] != 0)
	423	;
	424	if ((flags & COMMENT) != 0)
	425	while (src[i++] != 0)
	426	;
	427	if ((flags & HEAD_CRC) != 0)
	428	i += 2;
	429	if (i >= srclen) {
	430	puts ("Error: gunzip out of data in header\n");
	431	return -1;
	432	}
	433
	434	s.zalloc = zalloc;
	435	s.zfree = (free_func)zfree;
436
437	r = inflateInit2(&s, -MAX_WBITS);
438	if (r != Z_OK) {
439	printf ("Error: inflateInit2() returned %d\n", r);
440	return (-1);
441	}
442	s.next_in = src + i;
443	s.avail_in = srclen - i;
444	s.next_out = dst;
445	s.avail_out = dstlen;
446	r = inflate(&s, Z_FINISH);
447	if (r != Z_OK && r != Z_STREAM_END) {
448	printf ("Error: inflate() returned %d\n", r);
449	return -1;
450	}
451	dstbytes = s.next_out - (unsigned char *) dst;
452	inflateEnd(&s);
453
454	return dstbytes;
455	}
456
1c7b3754	457	/* Load a U-Boot image. */
5a9154e0 AL	458	int load_uimage(const char filename, target_ulong ep, target_ulong *loadaddr,
5a9154e0 AL	459	int *is_linux)
1c7b3754	460	{
1c7b3754 PB	461	int fd;
	462	int size;
	463	uboot_image_header_t h;
	464	uboot_image_header_t *hdr = &h;
	465	uint8_t *data = NULL;
265ca29a	466	int ret = -1;
1c7b3754 PB	467
	468	fd = open(filename, O_RDONLY \| O_BINARY);
	469	if (fd < 0)
	470	return -1;
	471
	472	size = read(fd, hdr, sizeof(uboot_image_header_t));
	473	if (size < 0)
265ca29a	474	goto out;
1c7b3754 PB	475
	476	bswap_uboot_header(hdr);
	477
	478	if (hdr->ih_magic != IH_MAGIC)
265ca29a	479	goto out;
1c7b3754	480
7e5f90fa AL	481	/* TODO: Implement other image types. */
	482	if (hdr->ih_type != IH_TYPE_KERNEL) {
	483	fprintf(stderr, "Can only load u-boot image type \"kernel\"\n");
265ca29a	484	goto out;
1c7b3754 PB	485	}
1c7b3754 PB	486
5a123577 AL	487	switch (hdr->ih_comp) {
	488	case IH_COMP_NONE:
	489	case IH_COMP_GZIP:
	490	break;
	491	default:
	492	fprintf(stderr,
	493	"Unable to load u-boot images with compression type %d\n",
	494	hdr->ih_comp);
265ca29a	495	goto out;
1c7b3754 PB	496	}
	497
	498	/* TODO: Check CPU type. */
	499	if (is_linux) {
7e5f90fa	500	if (hdr->ih_os == IH_OS_LINUX)
1c7b3754 PB	501	*is_linux = 1;
	502	else
	503	*is_linux = 0;
	504	}
	505
	506	*ep = hdr->ih_ep;
	507	data = qemu_malloc(hdr->ih_size);
	508	if (!data)
265ca29a	509	goto out;
1c7b3754 PB	510
	511	if (read(fd, data, hdr->ih_size) != hdr->ih_size) {
	512	fprintf(stderr, "Error reading file\n");
265ca29a	513	goto out;
1c7b3754 PB	514	}
1c7b3754 PB	515
5a123577 AL	516	if (hdr->ih_comp == IH_COMP_GZIP) {
	517	uint8_t *compressed_data;
	518	size_t max_bytes;
	519	ssize_t bytes;
	520
	521	compressed_data = data;
	522	max_bytes = UBOOT_MAX_GUNZIP_BYTES;
	523	data = qemu_malloc(max_bytes);
	524
	525	bytes = gunzip(data, max_bytes, compressed_data, hdr->ih_size);
	526	qemu_free(compressed_data);
	527	if (bytes < 0) {
	528	fprintf(stderr, "Unable to decompress gzipped image!\n");
	529	goto out;
	530	}
	531	hdr->ih_size = bytes;
	532	}
	533
1c7b3754 PB	534	cpu_physical_memory_write_rom(hdr->ih_load, data, hdr->ih_size);
1c7b3754 PB	535
21cafd08 AL	536	if (loadaddr)
	537	*loadaddr = hdr->ih_load;
	538
265ca29a	539	ret = hdr->ih_size;
1c7b3754	540
265ca29a	541	out:
1c7b3754 PB	542	if (data)
	543	qemu_free(data);
	544	close(fd);
265ca29a	545	return ret;
1c7b3754	546	}