2007-01-14 05:27:25 +01:00
|
|
|
/*
|
|
|
|
* Copyright (C) 2007 Michael Brown <mbrown@fensystems.co.uk>.
|
|
|
|
*
|
|
|
|
* 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 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., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
|
|
*/
|
|
|
|
|
|
|
|
/**
|
|
|
|
* @file
|
|
|
|
*
|
|
|
|
* Linux bzImage image format
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
2007-01-14 15:29:30 +01:00
|
|
|
#include <stdint.h>
|
|
|
|
#include <stdlib.h>
|
|
|
|
#include <string.h>
|
2007-01-14 05:27:25 +01:00
|
|
|
#include <errno.h>
|
|
|
|
#include <assert.h>
|
|
|
|
#include <realmode.h>
|
|
|
|
#include <bzimage.h>
|
|
|
|
#include <gpxe/uaccess.h>
|
|
|
|
#include <gpxe/image.h>
|
|
|
|
#include <gpxe/segment.h>
|
|
|
|
#include <gpxe/memmap.h>
|
|
|
|
#include <gpxe/shutdown.h>
|
2007-01-14 17:09:01 +01:00
|
|
|
#include <gpxe/initrd.h>
|
2007-01-14 05:27:25 +01:00
|
|
|
|
|
|
|
struct image_type bzimage_image_type __image_type ( PROBE_NORMAL );
|
|
|
|
|
2007-01-14 14:36:33 +01:00
|
|
|
/**
|
|
|
|
* bzImage load context
|
|
|
|
*/
|
|
|
|
struct bzimage_load_context {
|
|
|
|
/** Real-mode kernel portion load segment address */
|
|
|
|
unsigned int rm_kernel_seg;
|
|
|
|
/** Real-mode kernel portion load address */
|
|
|
|
userptr_t rm_kernel;
|
|
|
|
/** Real-mode kernel portion file size */
|
|
|
|
size_t rm_filesz;
|
|
|
|
/** Real-mode heap top (offset from rm_kernel) */
|
|
|
|
size_t rm_heap;
|
|
|
|
/** Command line (offset from rm_kernel) */
|
|
|
|
size_t rm_cmdline;
|
|
|
|
/** Real-mode kernel portion total memory size */
|
|
|
|
size_t rm_memsz;
|
|
|
|
/** Non-real-mode kernel portion load address */
|
|
|
|
userptr_t pm_kernel;
|
|
|
|
/** Non-real-mode kernel portion file and memory size */
|
|
|
|
size_t pm_sz;
|
|
|
|
};
|
|
|
|
|
2007-01-14 13:34:35 +01:00
|
|
|
/**
|
|
|
|
* bzImage execution context
|
|
|
|
*/
|
2007-01-14 14:36:33 +01:00
|
|
|
struct bzimage_exec_context {
|
2007-01-14 15:29:30 +01:00
|
|
|
/** Real-mode kernel portion load segment address */
|
|
|
|
unsigned int rm_kernel_seg;
|
|
|
|
/** Real-mode kernel portion load address */
|
|
|
|
userptr_t rm_kernel;
|
|
|
|
/** Real-mode heap top (offset from rm_kernel) */
|
|
|
|
size_t rm_heap;
|
|
|
|
/** Command line (offset from rm_kernel) */
|
|
|
|
size_t rm_cmdline;
|
|
|
|
/** Video mode */
|
|
|
|
unsigned int vid_mode;
|
|
|
|
/** Memory limit */
|
|
|
|
uint64_t mem_limit;
|
2007-01-14 17:09:01 +01:00
|
|
|
/** Initrd address */
|
|
|
|
physaddr_t ramdisk_image;
|
|
|
|
/** Initrd size */
|
|
|
|
physaddr_t ramdisk_size;
|
2007-01-14 13:34:35 +01:00
|
|
|
};
|
|
|
|
|
2007-01-14 15:29:30 +01:00
|
|
|
/**
|
|
|
|
* Parse kernel command line for bootloader parameters
|
|
|
|
*
|
|
|
|
* @v image bzImage file
|
|
|
|
* @v exec_ctx Execution context
|
|
|
|
* @v cmdline Kernel command line
|
|
|
|
* @ret rc Return status code
|
|
|
|
*/
|
|
|
|
static int bzimage_parse_cmdline ( struct image *image,
|
|
|
|
struct bzimage_exec_context *exec_ctx,
|
|
|
|
const char *cmdline ) {
|
|
|
|
char *vga;
|
|
|
|
char *mem;
|
|
|
|
|
|
|
|
/* Look for "vga=" */
|
|
|
|
if ( ( vga = strstr ( cmdline, "vga=" ) ) ) {
|
|
|
|
vga += 4;
|
|
|
|
if ( strcmp ( vga, "normal" ) == 0 ) {
|
|
|
|
exec_ctx->vid_mode = BZI_VID_MODE_NORMAL;
|
|
|
|
} else if ( strcmp ( vga, "ext" ) == 0 ) {
|
|
|
|
exec_ctx->vid_mode = BZI_VID_MODE_EXT;
|
|
|
|
} else if ( strcmp ( vga, "ask" ) == 0 ) {
|
|
|
|
exec_ctx->vid_mode = BZI_VID_MODE_ASK;
|
|
|
|
} else {
|
|
|
|
exec_ctx->vid_mode = strtoul ( vga, &vga, 16 );
|
|
|
|
if ( *vga && ( *vga != ' ' ) ) {
|
2007-01-14 17:09:01 +01:00
|
|
|
DBGC ( image, "bzImage %p strange \"vga=\""
|
|
|
|
"terminator '%c'\n", image, *vga );
|
2007-01-14 15:29:30 +01:00
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Look for "mem=" */
|
|
|
|
if ( ( mem = strstr ( cmdline, "mem=" ) ) ) {
|
|
|
|
mem += 4;
|
|
|
|
exec_ctx->mem_limit = strtoul ( mem, &mem, 0 );
|
|
|
|
switch ( *mem ) {
|
|
|
|
case 'G':
|
2007-01-14 17:09:01 +01:00
|
|
|
case 'g':
|
2007-01-14 15:29:30 +01:00
|
|
|
exec_ctx->mem_limit <<= 10;
|
|
|
|
case 'M':
|
2007-01-14 17:09:01 +01:00
|
|
|
case 'm':
|
2007-01-14 15:29:30 +01:00
|
|
|
exec_ctx->mem_limit <<= 10;
|
|
|
|
case 'K':
|
2007-01-14 17:09:01 +01:00
|
|
|
case 'k':
|
2007-01-14 15:29:30 +01:00
|
|
|
exec_ctx->mem_limit <<= 10;
|
|
|
|
break;
|
|
|
|
case '\0':
|
|
|
|
case ' ':
|
|
|
|
break;
|
|
|
|
default:
|
2007-01-14 17:09:01 +01:00
|
|
|
DBGC ( image, "bzImage %p strange \"mem=\" "
|
|
|
|
"terminator '%c'\n", image, *mem );
|
2007-01-14 15:29:30 +01:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Set command line
|
|
|
|
*
|
|
|
|
* @v image bzImage image
|
|
|
|
* @v exec_ctx Execution context
|
|
|
|
* @v cmdline Kernel command line
|
|
|
|
* @ret rc Return status code
|
|
|
|
*/
|
|
|
|
static int bzimage_set_cmdline ( struct image *image,
|
|
|
|
struct bzimage_exec_context *exec_ctx,
|
|
|
|
const char *cmdline ) {
|
|
|
|
size_t cmdline_len;
|
|
|
|
|
|
|
|
/* Copy command line down to real-mode portion */
|
|
|
|
cmdline_len = ( strlen ( cmdline ) + 1 );
|
|
|
|
if ( cmdline_len > BZI_CMDLINE_SIZE )
|
|
|
|
cmdline_len = BZI_CMDLINE_SIZE;
|
|
|
|
copy_to_user ( exec_ctx->rm_kernel, exec_ctx->rm_cmdline,
|
|
|
|
cmdline, cmdline_len );
|
|
|
|
DBGC ( image, "bzImage %p command line \"%s\"\n", image, cmdline );
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2007-01-14 17:09:01 +01:00
|
|
|
/**
|
|
|
|
* Load initrd, if any
|
|
|
|
*
|
|
|
|
* @v image bzImage image
|
|
|
|
* @v exec_ctx Execution context
|
|
|
|
* @ret rc Return status code
|
|
|
|
*/
|
|
|
|
static int bzimage_load_initrd ( struct image *image,
|
|
|
|
struct bzimage_exec_context *exec_ctx,
|
|
|
|
struct image *initrd ) {
|
|
|
|
physaddr_t start = user_to_phys ( initrd->data, 0 );
|
|
|
|
int rc;
|
|
|
|
|
|
|
|
DBGC ( image, "bzImage %p loading initrd %p (%s)\n",
|
|
|
|
image, initrd, initrd->name );
|
|
|
|
|
|
|
|
/* Find a suitable start address */
|
|
|
|
if ( ( start + initrd->len ) <= exec_ctx->mem_limit ) {
|
|
|
|
/* Just use initrd in situ */
|
|
|
|
DBGC ( image, "bzImage %p using initrd as [%lx,%lx)\n",
|
|
|
|
image, start, ( start + initrd->len ) );
|
|
|
|
} else {
|
|
|
|
for ( ; ; start -= 0x100000 ) {
|
|
|
|
/* Check that we're not going to overwrite the
|
|
|
|
* kernel itself. This check isn't totally
|
|
|
|
* accurate, but errs on the side of caution.
|
|
|
|
*/
|
|
|
|
if ( start <= ( BZI_LOAD_HIGH_ADDR + image->len ) ) {
|
|
|
|
DBGC ( image, "bzImage %p could not find a "
|
|
|
|
"location for initrd\n", image );
|
|
|
|
return -ENOBUFS;
|
|
|
|
}
|
|
|
|
/* Check that we are within the kernel's range */
|
|
|
|
if ( ( start + initrd->len ) > exec_ctx->mem_limit )
|
|
|
|
continue;
|
|
|
|
/* Prepare and verify segment */
|
|
|
|
if ( ( rc = prep_segment ( phys_to_user ( start ),
|
|
|
|
initrd->len,
|
|
|
|
initrd->len ) ) != 0 )
|
|
|
|
continue;
|
|
|
|
/* Copy to segment */
|
|
|
|
DBGC ( image, "bzImage %p relocating initrd to "
|
|
|
|
"[%lx,%lx)\n", image, start,
|
|
|
|
( start + initrd->len ) );
|
|
|
|
memcpy_user ( phys_to_user ( start ), 0,
|
|
|
|
initrd->data, 0, initrd->len );
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Record initrd location */
|
|
|
|
exec_ctx->ramdisk_image = start;
|
|
|
|
exec_ctx->ramdisk_size = initrd->len;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2007-01-14 05:27:25 +01:00
|
|
|
/**
|
|
|
|
* Execute bzImage image
|
|
|
|
*
|
|
|
|
* @v image bzImage image
|
|
|
|
* @ret rc Return status code
|
|
|
|
*/
|
|
|
|
static int bzimage_exec ( struct image *image ) {
|
2007-01-14 15:29:30 +01:00
|
|
|
struct bzimage_exec_context exec_ctx;
|
|
|
|
struct bzimage_header bzhdr;
|
|
|
|
const char *cmdline = ( image->cmdline ? image->cmdline : "" );
|
2007-01-14 17:09:01 +01:00
|
|
|
struct image *initrd;
|
2007-01-14 15:29:30 +01:00
|
|
|
int rc;
|
2007-01-14 13:34:35 +01:00
|
|
|
|
2007-01-14 17:09:01 +01:00
|
|
|
/* Initialise context */
|
|
|
|
memset ( &exec_ctx, 0, sizeof ( exec_ctx ) );
|
|
|
|
|
2007-01-14 15:29:30 +01:00
|
|
|
/* Retrieve kernel header */
|
|
|
|
exec_ctx.rm_kernel_seg = image->priv.ul;
|
|
|
|
exec_ctx.rm_kernel = real_to_user ( exec_ctx.rm_kernel_seg, 0 );
|
|
|
|
copy_from_user ( &bzhdr, exec_ctx.rm_kernel, BZI_HDR_OFFSET,
|
|
|
|
sizeof ( bzhdr ) );
|
|
|
|
exec_ctx.rm_cmdline = exec_ctx.rm_heap =
|
|
|
|
( bzhdr.heap_end_ptr + 0x200 );
|
|
|
|
exec_ctx.vid_mode = bzhdr.vid_mode;
|
2007-01-14 17:09:01 +01:00
|
|
|
if ( bzhdr.version >= 0x0203 ) {
|
|
|
|
exec_ctx.mem_limit = ( bzhdr.initrd_addr_max + 1 );
|
|
|
|
} else {
|
|
|
|
exec_ctx.mem_limit = ( BZI_INITRD_MAX + 1 );
|
|
|
|
}
|
2007-01-14 15:29:30 +01:00
|
|
|
|
|
|
|
/* Parse command line for bootloader parameters */
|
|
|
|
if ( ( rc = bzimage_parse_cmdline ( image, &exec_ctx, cmdline ) ) != 0)
|
|
|
|
return rc;
|
|
|
|
|
|
|
|
/* Store command line */
|
|
|
|
if ( ( rc = bzimage_set_cmdline ( image, &exec_ctx, cmdline ) ) != 0 )
|
|
|
|
return rc;
|
|
|
|
|
2007-01-14 17:09:01 +01:00
|
|
|
/* Load an initrd, if one exists */
|
|
|
|
for_each_image ( initrd ) {
|
|
|
|
if ( initrd->type == &initrd_image_type ) {
|
|
|
|
if ( ( rc = bzimage_load_initrd ( image, &exec_ctx,
|
|
|
|
initrd ) ) != 0 )
|
|
|
|
return rc;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2007-01-14 15:29:30 +01:00
|
|
|
/* Update and store kernel header */
|
|
|
|
bzhdr.vid_mode = exec_ctx.vid_mode;
|
2007-01-14 17:09:01 +01:00
|
|
|
bzhdr.ramdisk_image = exec_ctx.ramdisk_image;
|
|
|
|
bzhdr.ramdisk_size = exec_ctx.ramdisk_size;
|
2007-01-14 15:29:30 +01:00
|
|
|
copy_to_user ( exec_ctx.rm_kernel, BZI_HDR_OFFSET, &bzhdr,
|
|
|
|
sizeof ( bzhdr ) );
|
2007-01-14 07:36:20 +01:00
|
|
|
|
|
|
|
/* Prepare for exiting */
|
|
|
|
shutdown();
|
|
|
|
|
|
|
|
/* Jump to the kernel */
|
|
|
|
__asm__ __volatile__ ( REAL_CODE ( "movw %w0, %%ds\n\t"
|
|
|
|
"movw %w0, %%es\n\t"
|
|
|
|
"movw %w0, %%fs\n\t"
|
|
|
|
"movw %w0, %%gs\n\t"
|
|
|
|
"movw %w0, %%ss\n\t"
|
|
|
|
"movw %w1, %%sp\n\t"
|
|
|
|
"pushw %w2\n\t"
|
|
|
|
"pushw $0\n\t"
|
|
|
|
"lret\n\t" )
|
2007-01-14 15:29:30 +01:00
|
|
|
: : "r" ( exec_ctx.rm_kernel_seg ),
|
|
|
|
"r" ( exec_ctx.rm_heap ),
|
|
|
|
"r" ( exec_ctx.rm_kernel_seg + 0x20 ) );
|
2007-01-14 07:36:20 +01:00
|
|
|
|
|
|
|
/* There is no way for the image to return, since we provide
|
|
|
|
* no return address.
|
|
|
|
*/
|
2007-01-14 13:34:35 +01:00
|
|
|
assert ( 0 );
|
2007-01-14 07:36:20 +01:00
|
|
|
|
|
|
|
return -ECANCELED; /* -EIMPOSSIBLE */
|
2007-01-14 05:27:25 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
2007-01-14 14:36:33 +01:00
|
|
|
* Load and parse bzImage header
|
2007-01-14 05:27:25 +01:00
|
|
|
*
|
|
|
|
* @v image bzImage file
|
2007-01-14 14:36:33 +01:00
|
|
|
* @v load_ctx Load context
|
|
|
|
* @v bzhdr Buffer for bzImage header
|
2007-01-14 05:27:25 +01:00
|
|
|
* @ret rc Return status code
|
|
|
|
*/
|
2007-01-14 14:36:33 +01:00
|
|
|
static int bzimage_load_header ( struct image *image,
|
|
|
|
struct bzimage_load_context *load_ctx,
|
|
|
|
struct bzimage_header *bzhdr ) {
|
2007-01-14 05:27:25 +01:00
|
|
|
|
|
|
|
/* Sanity check */
|
2007-01-14 14:36:33 +01:00
|
|
|
if ( image->len < ( BZI_HDR_OFFSET + sizeof ( *bzhdr ) ) ) {
|
2007-01-14 07:36:20 +01:00
|
|
|
DBGC ( image, "bzImage %p too short for kernel header\n",
|
|
|
|
image );
|
2007-01-14 05:27:25 +01:00
|
|
|
return -ENOEXEC;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Read and verify header */
|
2007-01-14 14:36:33 +01:00
|
|
|
copy_from_user ( bzhdr, image->data, BZI_HDR_OFFSET,
|
|
|
|
sizeof ( *bzhdr ) );
|
|
|
|
if ( bzhdr->header != BZI_SIGNATURE ) {
|
|
|
|
DBGC ( image, "bzImage %p bad signature\n", image );
|
2007-01-14 05:27:25 +01:00
|
|
|
return -ENOEXEC;
|
|
|
|
}
|
|
|
|
|
2007-01-14 07:36:20 +01:00
|
|
|
/* We don't support ancient kernels */
|
2007-01-14 14:36:33 +01:00
|
|
|
if ( bzhdr->version < 0x0200 ) {
|
2007-01-14 07:36:20 +01:00
|
|
|
DBGC ( image, "bzImage %p version %04x not supported\n",
|
2007-01-14 14:36:33 +01:00
|
|
|
image, bzhdr->version );
|
2007-01-14 07:36:20 +01:00
|
|
|
return -ENOTSUP;
|
|
|
|
}
|
|
|
|
|
2007-01-14 14:36:33 +01:00
|
|
|
/* Calculate load address and size of real-mode portion */
|
|
|
|
load_ctx->rm_kernel_seg = 0x1000; /* place RM kernel at 1000:0000 */
|
|
|
|
load_ctx->rm_kernel = real_to_user ( load_ctx->rm_kernel_seg, 0 );
|
|
|
|
load_ctx->rm_filesz = load_ctx->rm_memsz =
|
|
|
|
( ( bzhdr->setup_sects ? bzhdr->setup_sects : 4 ) + 1 ) << 9;
|
|
|
|
if ( load_ctx->rm_filesz > image->len ) {
|
2007-01-14 07:36:20 +01:00
|
|
|
DBGC ( image, "bzImage %p too short for %zd byte of setup\n",
|
2007-01-14 14:36:33 +01:00
|
|
|
image, load_ctx->rm_filesz );
|
2007-01-14 07:36:20 +01:00
|
|
|
return -ENOEXEC;
|
|
|
|
}
|
2007-01-14 14:36:33 +01:00
|
|
|
|
|
|
|
/* Calculate load address and size of non-real-mode portion */
|
|
|
|
load_ctx->pm_kernel = ( ( bzhdr->loadflags & BZI_LOAD_HIGH ) ?
|
|
|
|
phys_to_user ( BZI_LOAD_HIGH_ADDR ) :
|
|
|
|
phys_to_user ( BZI_LOAD_LOW_ADDR ) );
|
|
|
|
load_ctx->pm_sz = ( image->len - load_ctx->rm_filesz );
|
|
|
|
|
|
|
|
DBGC ( image, "bzImage %p version %04x RM %#zx bytes PM %#zx bytes\n",
|
|
|
|
image, bzhdr->version, load_ctx->rm_filesz, load_ctx->pm_sz );
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Load real-mode portion of bzImage
|
|
|
|
*
|
|
|
|
* @v image bzImage file
|
|
|
|
* @v load_ctx Load context
|
|
|
|
* @ret rc Return status code
|
|
|
|
*/
|
|
|
|
static int bzimage_load_real ( struct image *image,
|
2007-01-14 15:29:30 +01:00
|
|
|
struct bzimage_load_context *load_ctx ) {
|
2007-01-14 14:36:33 +01:00
|
|
|
int rc;
|
2007-01-14 07:36:20 +01:00
|
|
|
|
|
|
|
/* Allow space for the stack and heap */
|
2007-01-14 14:36:33 +01:00
|
|
|
load_ctx->rm_memsz += BZI_STACK_SIZE;
|
|
|
|
load_ctx->rm_heap = load_ctx->rm_memsz;
|
2007-01-14 07:36:20 +01:00
|
|
|
|
2007-01-14 15:29:30 +01:00
|
|
|
/* Allow space for the command line */
|
2007-01-14 14:36:33 +01:00
|
|
|
load_ctx->rm_cmdline = load_ctx->rm_memsz;
|
2007-01-14 15:29:30 +01:00
|
|
|
load_ctx->rm_memsz += BZI_CMDLINE_SIZE;
|
2007-01-14 07:36:20 +01:00
|
|
|
|
|
|
|
/* Prepare, verify, and load the real-mode segment */
|
2007-01-14 14:36:33 +01:00
|
|
|
if ( ( rc = prep_segment ( load_ctx->rm_kernel, load_ctx->rm_filesz,
|
|
|
|
load_ctx->rm_memsz ) ) != 0 ) {
|
2007-01-14 07:36:20 +01:00
|
|
|
DBGC ( image, "bzImage %p could not prepare RM segment: %s\n",
|
|
|
|
image, strerror ( rc ) );
|
|
|
|
return rc;
|
|
|
|
}
|
2007-01-14 14:36:33 +01:00
|
|
|
memcpy_user ( load_ctx->rm_kernel, 0, image->data, 0,
|
|
|
|
load_ctx->rm_filesz );
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
2007-01-14 07:36:20 +01:00
|
|
|
|
2007-01-14 14:36:33 +01:00
|
|
|
/**
|
|
|
|
* Load non-real-mode portion of bzImage
|
|
|
|
*
|
|
|
|
* @v image bzImage file
|
|
|
|
* @v load_ctx Load context
|
|
|
|
* @ret rc Return status code
|
|
|
|
*/
|
|
|
|
static int bzimage_load_non_real ( struct image *image,
|
|
|
|
struct bzimage_load_context *load_ctx ) {
|
|
|
|
int rc;
|
|
|
|
|
|
|
|
/* Prepare, verify and load the non-real-mode segment */
|
|
|
|
if ( ( rc = prep_segment ( load_ctx->pm_kernel, load_ctx->pm_sz,
|
|
|
|
load_ctx->pm_sz ) ) != 0 ) {
|
2007-01-14 07:36:20 +01:00
|
|
|
DBGC ( image, "bzImage %p could not prepare PM segment: %s\n",
|
|
|
|
image, strerror ( rc ) );
|
|
|
|
return rc;
|
|
|
|
}
|
2007-01-14 14:36:33 +01:00
|
|
|
memcpy_user ( load_ctx->pm_kernel, 0, image->data, load_ctx->rm_filesz,
|
|
|
|
load_ctx->pm_sz );
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
2007-01-14 07:36:20 +01:00
|
|
|
|
2007-01-14 14:36:33 +01:00
|
|
|
/**
|
|
|
|
* Update and store bzImage header
|
|
|
|
*
|
|
|
|
* @v image bzImage file
|
|
|
|
* @v load_ctx Load context
|
|
|
|
* @v bzhdr Original bzImage header
|
|
|
|
* @ret rc Return status code
|
|
|
|
*/
|
|
|
|
static int bzimage_write_header ( struct image *image __unused,
|
|
|
|
struct bzimage_load_context *load_ctx,
|
|
|
|
struct bzimage_header *bzhdr ) {
|
|
|
|
struct bzimage_cmdline cmdline;
|
2007-01-14 07:36:20 +01:00
|
|
|
|
|
|
|
/* Update the header and copy it into the loaded kernel */
|
2007-01-14 14:36:33 +01:00
|
|
|
bzhdr->type_of_loader = BZI_LOADER_TYPE_ETHERBOOT;
|
|
|
|
if ( bzhdr->version >= 0x0201 ) {
|
|
|
|
bzhdr->heap_end_ptr = ( load_ctx->rm_heap - 0x200 );
|
|
|
|
bzhdr->loadflags |= BZI_CAN_USE_HEAP;
|
2007-01-14 07:36:20 +01:00
|
|
|
}
|
2007-01-14 14:36:33 +01:00
|
|
|
if ( bzhdr->version >= 0x0202 ) {
|
|
|
|
bzhdr->cmd_line_ptr = user_to_phys ( load_ctx->rm_kernel,
|
|
|
|
load_ctx->rm_cmdline );
|
2007-01-14 07:36:20 +01:00
|
|
|
} else {
|
2007-01-14 14:36:33 +01:00
|
|
|
cmdline.magic = BZI_CMDLINE_MAGIC;
|
|
|
|
cmdline.offset = load_ctx->rm_cmdline;
|
|
|
|
copy_to_user ( load_ctx->rm_kernel, BZI_CMDLINE_OFFSET,
|
|
|
|
&cmdline, sizeof ( cmdline ) );
|
|
|
|
bzhdr->setup_move_size = load_ctx->rm_memsz;
|
2007-01-14 07:36:20 +01:00
|
|
|
}
|
2007-01-14 14:36:33 +01:00
|
|
|
copy_to_user ( load_ctx->rm_kernel, BZI_HDR_OFFSET,
|
|
|
|
bzhdr, sizeof ( *bzhdr ) );
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Load bzImage image into memory
|
|
|
|
*
|
|
|
|
* @v image bzImage file
|
|
|
|
* @ret rc Return status code
|
|
|
|
*/
|
|
|
|
int bzimage_load ( struct image *image ) {
|
|
|
|
struct bzimage_load_context load_ctx;
|
2007-01-14 15:29:30 +01:00
|
|
|
struct bzimage_header bzhdr;
|
2007-01-14 14:36:33 +01:00
|
|
|
int rc;
|
|
|
|
|
2007-01-14 17:09:01 +01:00
|
|
|
/* Initialise context */
|
|
|
|
memset ( &load_ctx, 0, sizeof ( load_ctx ) );
|
|
|
|
|
2007-01-14 14:36:33 +01:00
|
|
|
/* Load and verify header */
|
|
|
|
if ( ( rc = bzimage_load_header ( image, &load_ctx, &bzhdr ) ) != 0 )
|
|
|
|
return rc;
|
|
|
|
|
|
|
|
/* This is a bzImage image, valid or otherwise */
|
|
|
|
if ( ! image->type )
|
|
|
|
image->type = &bzimage_image_type;
|
|
|
|
|
|
|
|
/* Load real-mode portion */
|
2007-01-14 15:29:30 +01:00
|
|
|
if ( ( rc = bzimage_load_real ( image, &load_ctx ) ) != 0 )
|
2007-01-14 14:36:33 +01:00
|
|
|
return rc;
|
|
|
|
|
|
|
|
/* Load non-real-mode portion */
|
|
|
|
if ( ( rc = bzimage_load_non_real ( image, &load_ctx ) ) != 0 )
|
|
|
|
return rc;
|
|
|
|
|
|
|
|
/* Update and write out header */
|
|
|
|
if ( ( rc = bzimage_write_header ( image, &load_ctx, &bzhdr ) ) != 0 )
|
|
|
|
return rc;
|
2007-01-14 07:36:20 +01:00
|
|
|
|
2007-01-14 15:29:30 +01:00
|
|
|
/* Record real-mode segment in image private data field */
|
|
|
|
image->priv.ul = load_ctx.rm_kernel_seg;
|
2007-01-14 07:36:20 +01:00
|
|
|
|
2007-01-14 05:27:25 +01:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/** Linux bzImage image type */
|
|
|
|
struct image_type bzimage_image_type __image_type ( PROBE_NORMAL ) = {
|
|
|
|
.name = "bzImage",
|
|
|
|
.load = bzimage_load,
|
|
|
|
.exec = bzimage_exec,
|
|
|
|
};
|