[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);

	cpu_physical_memory_write_rom(dst_addr, buf, did);
	dst_addr += did;
	nbytes -= did;
	if (did != want)
	    break;
    }
    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 (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)
{
    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 = 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 (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);
293f78bc BS	93
	94	cpu_physical_memory_write_rom(dst_addr, buf, did);
	95	dst_addr += did;
	96	nbytes -= did;
65297bc4 AJ	97	if (did != want)
65297bc4 AJ	98	break;
293f78bc BS	99	}
	100	return dst_addr - dst_begin;
	101	}
	102
	103	/* returns 0 on error, 1 if ok */
	104	int fread_targphys_ok(target_phys_addr_t dst_addr, size_t nbytes, FILE *f)
	105	{
	106	return fread_targphys(dst_addr, nbytes, f) == nbytes;
	107	}
	108
	109	/* read()-like version */
	110	int read_targphys(int fd, target_phys_addr_t dst_addr, size_t nbytes)
	111	{
	112	uint8_t buf[4096];
	113	target_phys_addr_t dst_begin = dst_addr;
	114	size_t want, did;
	115
	116	while (nbytes) {
	117	want = nbytes > sizeof(buf) ? sizeof(buf) : nbytes;
	118	did = read(fd, buf, want);
	119	if (did != want) break;
	120
	121	cpu_physical_memory_write_rom(dst_addr, buf, did);
	122	dst_addr += did;
	123	nbytes -= did;
	124	}
	125	return dst_addr - dst_begin;
	126	}
	127
	128	/* return the size or -1 if error */
	129	int load_image_targphys(const char *filename,
	130	target_phys_addr_t addr, int max_sz)
	131	{
	132	FILE *f;
	133	size_t got;
	134
	135	f = fopen(filename, "rb");
	136	if (!f) return -1;
	137
	138	got = fread_targphys(addr, max_sz, f);
	139	if (ferror(f)) { fclose(f); return -1; }
	140	fclose(f);
	141
	142	return got;
	143	}
	144
	145	void pstrcpy_targphys(target_phys_addr_t dest, int buf_size,
	146	const char *source)
	147	{
	148	static const uint8_t nul_byte = 0;
	149	const char *nulp;
	150
	151	if (buf_size <= 0) return;
	152	nulp = memchr(source, 0, buf_size);
	153	if (nulp) {
	154	cpu_physical_memory_write_rom(dest, (uint8_t *)source,
	155	(nulp - source) + 1);
	156	} else {
	157	cpu_physical_memory_write_rom(dest, (uint8_t *)source, buf_size - 1);
	158	cpu_physical_memory_write_rom(dest, &nul_byte, 1);
	159	}
	160	}
	161
5fe141fd FB	162	/* A.OUT loader */
	163
	164	struct exec
	165	{
	166	uint32_t a_info; /* Use macros N_MAGIC, etc for access */
	167	uint32_t a_text; /* length of text, in bytes */
	168	uint32_t a_data; /* length of data, in bytes */
	169	uint32_t a_bss; /* length of uninitialized data area, in bytes */
	170	uint32_t a_syms; /* length of symbol table data in file, in bytes */
	171	uint32_t a_entry; /* start address */
	172	uint32_t a_trsize; /* length of relocation info for text, in bytes */
	173	uint32_t a_drsize; /* length of relocation info for data, in bytes */
	174	};
	175
	176	#ifdef BSWAP_NEEDED
	177	static void bswap_ahdr(struct exec *e)
	178	{
	179	bswap32s(&e->a_info);
	180	bswap32s(&e->a_text);
	181	bswap32s(&e->a_data);
	182	bswap32s(&e->a_bss);
	183	bswap32s(&e->a_syms);
	184	bswap32s(&e->a_entry);
	185	bswap32s(&e->a_trsize);
	186	bswap32s(&e->a_drsize);
	187	}
	188	#else
	189	#define bswap_ahdr(x) do { } while (0)
	190	#endif
	191
	192	#define N_MAGIC(exec) ((exec).a_info & 0xffff)
	193	#define OMAGIC 0407
	194	#define NMAGIC 0410
	195	#define ZMAGIC 0413
	196	#define QMAGIC 0314
	197	#define _N_HDROFF(x) (1024 - sizeof (struct exec))
	198	#define N_TXTOFF(x) \
	199	(N_MAGIC(x) == ZMAGIC ? _N_HDROFF((x)) + sizeof (struct exec) : \
	200	(N_MAGIC(x) == QMAGIC ? 0 : sizeof (struct exec)))
	201	#define N_TXTADDR(x) (N_MAGIC(x) == QMAGIC ? TARGET_PAGE_SIZE : 0)
	202	#define N_DATOFF(x) (N_TXTOFF(x) + (x).a_text)
	203	#define _N_SEGMENT_ROUND(x) (((x) + TARGET_PAGE_SIZE - 1) & ~(TARGET_PAGE_SIZE - 1))
	204
	205	#define _N_TXTENDADDR(x) (N_TXTADDR(x)+(x).a_text)
	206
	207	#define N_DATADDR(x) \
	208	(N_MAGIC(x)==OMAGIC? (_N_TXTENDADDR(x)) \
	209	: (_N_SEGMENT_ROUND (_N_TXTENDADDR(x))))
	210
	211
293f78bc	212	int load_aout(const char *filename, target_phys_addr_t addr, int max_sz)
5fe141fd FB	213	{
	214	int fd, size, ret;
	215	struct exec e;
	216	uint32_t magic;
	217
	218	fd = open(filename, O_RDONLY \| O_BINARY);
	219	if (fd < 0)
	220	return -1;
	221
	222	size = read(fd, &e, sizeof(e));
	223	if (size < 0)
	224	goto fail;
	225
	226	bswap_ahdr(&e);
	227
	228	magic = N_MAGIC(e);
	229	switch (magic) {
	230	case ZMAGIC:
	231	case QMAGIC:
	232	case OMAGIC:
293f78bc BS	233	if (e.a_text + e.a_data > max_sz)
293f78bc BS	234	goto fail;
5fe141fd	235	lseek(fd, N_TXTOFF(e), SEEK_SET);
293f78bc	236	size = read_targphys(fd, addr, e.a_text + e.a_data);
5fe141fd FB	237	if (size < 0)
	238	goto fail;
	239	break;
	240	case NMAGIC:
293f78bc BS	241	if (N_DATADDR(e) + e.a_data > max_sz)
293f78bc BS	242	goto fail;
5fe141fd	243	lseek(fd, N_TXTOFF(e), SEEK_SET);
293f78bc	244	size = read_targphys(fd, addr, e.a_text);
5fe141fd FB	245	if (size < 0)
5fe141fd FB	246	goto fail;
293f78bc	247	ret = read_targphys(fd, addr + N_DATADDR(e), e.a_data);
5fe141fd FB	248	if (ret < 0)
	249	goto fail;
	250	size += ret;
	251	break;
	252	default:
	253	goto fail;
	254	}
	255	close(fd);
	256	return size;
	257	fail:
	258	close(fd);
	259	return -1;
	260	}
	261
	262	/* ELF loader */
	263
	264	static void *load_at(int fd, int offset, int size)
	265	{
	266	void *ptr;
	267	if (lseek(fd, offset, SEEK_SET) < 0)
	268	return NULL;
	269	ptr = qemu_malloc(size);
5fe141fd FB	270	if (read(fd, ptr, size) != size) {
	271	qemu_free(ptr);
	272	return NULL;
	273	}
	274	return ptr;
	275	}
	276
	277
	278	#define ELF_CLASS ELFCLASS32
	279	#include "elf.h"
	280
	281	#define SZ 32
	282	#define elf_word uint32_t
82790064	283	#define elf_sword int32_t
5fe141fd FB	284	#define bswapSZs bswap32s
	285	#include "elf_ops.h"
	286
	287	#undef elfhdr
	288	#undef elf_phdr
	289	#undef elf_shdr
	290	#undef elf_sym
	291	#undef elf_note
	292	#undef elf_word
82790064	293	#undef elf_sword
5fe141fd FB	294	#undef bswapSZs
	295	#undef SZ
	296	#define elfhdr elf64_hdr
	297	#define elf_phdr elf64_phdr
	298	#define elf_note elf64_note
	299	#define elf_shdr elf64_shdr
	300	#define elf_sym elf64_sym
	301	#define elf_word uint64_t
82790064	302	#define elf_sword int64_t
5fe141fd FB	303	#define bswapSZs bswap64s
	304	#define SZ 64
	305	#include "elf_ops.h"
	306
	307	/* return < 0 if error, otherwise the number of bytes loaded in memory */
83c1f87c	308	int load_elf(const char *filename, int64_t address_offset,
74287114	309	uint64_t pentry, uint64_t lowaddr, uint64_t *highaddr)
5fe141fd	310	{
9042c0e2	311	int fd, data_order, host_data_order, must_swab, ret;
5fe141fd FB	312	uint8_t e_ident[EI_NIDENT];
5fe141fd FB	313
699e4642	314	fd = open(filename, O_RDONLY \| O_BINARY);
5fe141fd FB	315	if (fd < 0) {
	316	perror(filename);
	317	return -1;
	318	}
	319	if (read(fd, e_ident, sizeof(e_ident)) != sizeof(e_ident))
	320	goto fail;
	321	if (e_ident[0] != ELFMAG0 \|\|
	322	e_ident[1] != ELFMAG1 \|\|
	323	e_ident[2] != ELFMAG2 \|\|
	324	e_ident[3] != ELFMAG3)
	325	goto fail;
	326	#ifdef WORDS_BIGENDIAN
	327	data_order = ELFDATA2MSB;
	328	#else
	329	data_order = ELFDATA2LSB;
	330	#endif
	331	must_swab = data_order != e_ident[EI_DATA];
9042c0e2 TS	332
	333	#ifdef TARGET_WORDS_BIGENDIAN
	334	host_data_order = ELFDATA2MSB;
	335	#else
	336	host_data_order = ELFDATA2LSB;
	337	#endif
	338	if (host_data_order != e_ident[EI_DATA])
	339	return -1;
	340
5fe141fd FB	341	lseek(fd, 0, SEEK_SET);
5fe141fd FB	342	if (e_ident[EI_CLASS] == ELFCLASS64) {
83c1f87c	343	ret = load_elf64(fd, address_offset, must_swab, pentry,
74287114	344	lowaddr, highaddr);
5fe141fd	345	} else {
83c1f87c	346	ret = load_elf32(fd, address_offset, must_swab, pentry,
74287114	347	lowaddr, highaddr);
5fe141fd FB	348	}
	349
	350	close(fd);
	351	return ret;
	352
	353	fail:
	354	close(fd);
	355	return -1;
	356	}
1c7b3754 PB	357
	358	static void bswap_uboot_header(uboot_image_header_t *hdr)
	359	{
	360	#ifndef WORDS_BIGENDIAN
	361	bswap32s(&hdr->ih_magic);
	362	bswap32s(&hdr->ih_hcrc);
	363	bswap32s(&hdr->ih_time);
	364	bswap32s(&hdr->ih_size);
	365	bswap32s(&hdr->ih_load);
	366	bswap32s(&hdr->ih_ep);
	367	bswap32s(&hdr->ih_dcrc);
	368	#endif
	369	}
	370
5a123577 AL	371
	372	#define ZALLOC_ALIGNMENT 16
	373
	374	static void zalloc(void x, unsigned items, unsigned size)
	375	{
	376	void *p;
	377
	378	size *= items;
	379	size = (size + ZALLOC_ALIGNMENT - 1) & ~(ZALLOC_ALIGNMENT - 1);
	380
	381	p = qemu_malloc(size);
	382
	383	return (p);
	384	}
	385
d13317e1	386	static void zfree(void x, void addr)
5a123577 AL	387	{
	388	qemu_free(addr);
	389	}
	390
	391
	392	#define HEAD_CRC 2
	393	#define EXTRA_FIELD 4
	394	#define ORIG_NAME 8
	395	#define COMMENT 0x10
	396	#define RESERVED 0xe0
	397
	398	#define DEFLATED 8
	399
	400	/* This is the maximum in uboot, so if a uImage overflows this, it would
	401	* overflow on real hardware too. */
	402	#define UBOOT_MAX_GUNZIP_BYTES 0x800000
	403
	404	static ssize_t gunzip(void dst, size_t dstlen, uint8_t src,
	405	size_t srclen)
	406	{
	407	z_stream s;
	408	ssize_t dstbytes;
	409	int r, i, flags;
	410
	411	/* skip header */
	412	i = 10;
	413	flags = src[3];
	414	if (src[2] != DEFLATED \|\| (flags & RESERVED) != 0) {
	415	puts ("Error: Bad gzipped data\n");
	416	return -1;
	417	}
	418	if ((flags & EXTRA_FIELD) != 0)
	419	i = 12 + src[10] + (src[11] << 8);
	420	if ((flags & ORIG_NAME) != 0)
	421	while (src[i++] != 0)
	422	;
	423	if ((flags & COMMENT) != 0)
	424	while (src[i++] != 0)
	425	;
	426	if ((flags & HEAD_CRC) != 0)
	427	i += 2;
	428	if (i >= srclen) {
	429	puts ("Error: gunzip out of data in header\n");
	430	return -1;
	431	}
	432
	433	s.zalloc = zalloc;
d13317e1	434	s.zfree = zfree;
5a123577 AL	435
	436	r = inflateInit2(&s, -MAX_WBITS);
	437	if (r != Z_OK) {
	438	printf ("Error: inflateInit2() returned %d\n", r);
	439	return (-1);
	440	}
	441	s.next_in = src + i;
	442	s.avail_in = srclen - i;
	443	s.next_out = dst;
	444	s.avail_out = dstlen;
	445	r = inflate(&s, Z_FINISH);
	446	if (r != Z_OK && r != Z_STREAM_END) {
	447	printf ("Error: inflate() returned %d\n", r);
	448	return -1;
	449	}
	450	dstbytes = s.next_out - (unsigned char *) dst;
	451	inflateEnd(&s);
	452
	453	return dstbytes;
	454	}
	455
1c7b3754	456	/* Load a U-Boot image. */
5a9154e0 AL	457	int load_uimage(const char filename, target_ulong ep, target_ulong *loadaddr,
5a9154e0 AL	458	int *is_linux)
1c7b3754	459	{
1c7b3754 PB	460	int fd;
	461	int size;
	462	uboot_image_header_t h;
	463	uboot_image_header_t *hdr = &h;
	464	uint8_t *data = NULL;
265ca29a	465	int ret = -1;
1c7b3754 PB	466
	467	fd = open(filename, O_RDONLY \| O_BINARY);
	468	if (fd < 0)
	469	return -1;
	470
	471	size = read(fd, hdr, sizeof(uboot_image_header_t));
	472	if (size < 0)
265ca29a	473	goto out;
1c7b3754 PB	474
	475	bswap_uboot_header(hdr);
	476
	477	if (hdr->ih_magic != IH_MAGIC)
265ca29a	478	goto out;
1c7b3754	479
7e5f90fa AL	480	/* TODO: Implement other image types. */
	481	if (hdr->ih_type != IH_TYPE_KERNEL) {
	482	fprintf(stderr, "Can only load u-boot image type \"kernel\"\n");
265ca29a	483	goto out;
1c7b3754 PB	484	}
1c7b3754 PB	485
5a123577 AL	486	switch (hdr->ih_comp) {
	487	case IH_COMP_NONE:
	488	case IH_COMP_GZIP:
	489	break;
	490	default:
	491	fprintf(stderr,
	492	"Unable to load u-boot images with compression type %d\n",
	493	hdr->ih_comp);
265ca29a	494	goto out;
1c7b3754 PB	495	}
	496
	497	/* TODO: Check CPU type. */
	498	if (is_linux) {
7e5f90fa	499	if (hdr->ih_os == IH_OS_LINUX)
1c7b3754 PB	500	*is_linux = 1;
	501	else
	502	*is_linux = 0;
	503	}
	504
	505	*ep = hdr->ih_ep;
	506	data = qemu_malloc(hdr->ih_size);
1c7b3754 PB	507
	508	if (read(fd, data, hdr->ih_size) != hdr->ih_size) {
	509	fprintf(stderr, "Error reading file\n");
265ca29a	510	goto out;
1c7b3754 PB	511	}
1c7b3754 PB	512
5a123577 AL	513	if (hdr->ih_comp == IH_COMP_GZIP) {
	514	uint8_t *compressed_data;
	515	size_t max_bytes;
	516	ssize_t bytes;
	517
	518	compressed_data = data;
	519	max_bytes = UBOOT_MAX_GUNZIP_BYTES;
	520	data = qemu_malloc(max_bytes);
	521
	522	bytes = gunzip(data, max_bytes, compressed_data, hdr->ih_size);
	523	qemu_free(compressed_data);
	524	if (bytes < 0) {
	525	fprintf(stderr, "Unable to decompress gzipped image!\n");
	526	goto out;
	527	}
	528	hdr->ih_size = bytes;
	529	}
	530
1c7b3754 PB	531	cpu_physical_memory_write_rom(hdr->ih_load, data, hdr->ih_size);
1c7b3754 PB	532
21cafd08 AL	533	if (loadaddr)
	534	*loadaddr = hdr->ih_load;
	535
265ca29a	536	ret = hdr->ih_size;
1c7b3754	537
265ca29a	538	out:
1c7b3754 PB	539	if (data)
	540	qemu_free(data);
	541	close(fd);
265ca29a	542	return ret;
1c7b3754	543	}