Initial import of qemu-2.4.1HEADmaster

1 files changed, 665 insertions, 0 deletions

diff --git a/roms/ipxe/src/arch/i386/image/bzimage.c b/roms/ipxe/src/arch/i386/image/bzimage.c
new file mode 100644
index 00000000..4865c394
--- /dev/null
+++ b/roms/ipxe/src/arch/i386/image/bzimage.c
@@ -0,0 +1,665 @@
+/*
+ * 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., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER );
+
+/**
+ * @file
+ *
+ * Linux bzImage image format
+ *
+ */
+
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <assert.h>
+#include <realmode.h>
+#include <bzimage.h>
+#include <initrd.h>
+#include <ipxe/uaccess.h>
+#include <ipxe/image.h>
+#include <ipxe/segment.h>
+#include <ipxe/init.h>
+#include <ipxe/cpio.h>
+#include <ipxe/features.h>
+
+FEATURE ( FEATURE_IMAGE, "bzImage", DHCP_EB_FEATURE_BZIMAGE, 1 );
+
+/**
+ * bzImage context
+ */
+struct bzimage_context {
+	/** Boot protocol version */
+	unsigned int version;
+	/** 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;
+	/** Command line maximum length */
+	size_t cmdline_size;
+	/** 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;
+	/** Video mode */
+	unsigned int vid_mode;
+	/** Memory limit */
+	uint64_t mem_limit;
+	/** Initrd address */
+	physaddr_t ramdisk_image;
+	/** Initrd size */
+	physaddr_t ramdisk_size;
+
+	/** Command line magic block */
+	struct bzimage_cmdline cmdline_magic;
+	/** bzImage header */
+	struct bzimage_header bzhdr;
+};
+
+/**
+ * Parse bzImage header
+ *
+ * @v image		bzImage file
+ * @v bzimg		bzImage context
+ * @v src		bzImage to parse
+ * @ret rc		Return status code
+ */
+static int bzimage_parse_header ( struct image *image,
+				  struct bzimage_context *bzimg,
+				  userptr_t src ) {
+	unsigned int syssize;
+	int is_bzimage;
+
+	/* Sanity check */
+	if ( image->len < ( BZI_HDR_OFFSET + sizeof ( bzimg->bzhdr ) ) ) {
+		DBGC ( image, "bzImage %p too short for kernel header\n",
+		       image );
+		return -ENOEXEC;
+	}
+
+	/* Read in header structures */
+	memset ( bzimg, 0, sizeof ( *bzimg ) );
+	copy_from_user ( &bzimg->cmdline_magic, src, BZI_CMDLINE_OFFSET,
+			 sizeof ( bzimg->cmdline_magic ) );
+	copy_from_user ( &bzimg->bzhdr, src, BZI_HDR_OFFSET,
+			 sizeof ( bzimg->bzhdr ) );
+
+	/* Calculate size of real-mode portion */
+	bzimg->rm_filesz = ( ( ( bzimg->bzhdr.setup_sects ?
+				 bzimg->bzhdr.setup_sects : 4 ) + 1 ) << 9 );
+	if ( bzimg->rm_filesz > image->len ) {
+		DBGC ( image, "bzImage %p too short for %zd byte of setup\n",
+		       image, bzimg->rm_filesz );
+		return -ENOEXEC;
+	}
+	bzimg->rm_memsz = BZI_ASSUMED_RM_SIZE;
+
+	/* Calculate size of protected-mode portion */
+	bzimg->pm_sz = ( image->len - bzimg->rm_filesz );
+	syssize = ( ( bzimg->pm_sz + 15 ) / 16 );
+
+	/* Check for signatures and determine version */
+	if ( bzimg->bzhdr.boot_flag != BZI_BOOT_FLAG ) {
+		DBGC ( image, "bzImage %p missing 55AA signature\n", image );
+		return -ENOEXEC;
+	}
+	if ( bzimg->bzhdr.header == BZI_SIGNATURE ) {
+		/* 2.00+ */
+		bzimg->version = bzimg->bzhdr.version;
+	} else {
+		/* Pre-2.00.  Check that the syssize field is correct,
+		 * as a guard against accepting arbitrary binary data,
+		 * since the 55AA check is pretty lax.  Note that the
+		 * syssize field is unreliable for protocols between
+		 * 2.00 and 2.03 inclusive, so we should not always
+		 * check this field.
+		 */
+		bzimg->version = 0x0100;
+		if ( bzimg->bzhdr.syssize != syssize ) {
+			DBGC ( image, "bzImage %p bad syssize %x (expected "
+			       "%x)\n", image, bzimg->bzhdr.syssize, syssize );
+			return -ENOEXEC;
+		}
+	}
+
+	/* Determine image type */
+	is_bzimage = ( ( bzimg->version >= 0x0200 ) ?
+		       ( bzimg->bzhdr.loadflags & BZI_LOAD_HIGH ) : 0 );
+
+	/* Calculate load address of real-mode portion */
+	bzimg->rm_kernel_seg = ( is_bzimage ? 0x1000 : 0x9000 );
+	bzimg->rm_kernel = real_to_user ( bzimg->rm_kernel_seg, 0 );
+
+	/* Allow space for the stack and heap */
+	bzimg->rm_memsz += BZI_STACK_SIZE;
+	bzimg->rm_heap = bzimg->rm_memsz;
+
+	/* Allow space for the command line */
+	bzimg->rm_cmdline = bzimg->rm_memsz;
+	bzimg->rm_memsz += BZI_CMDLINE_SIZE;
+
+	/* Calculate load address of protected-mode portion */
+	bzimg->pm_kernel = phys_to_user ( is_bzimage ? BZI_LOAD_HIGH_ADDR
+					: BZI_LOAD_LOW_ADDR );
+
+	/* Extract video mode */
+	bzimg->vid_mode = bzimg->bzhdr.vid_mode;
+
+	/* Extract memory limit */
+	bzimg->mem_limit = ( ( bzimg->version >= 0x0203 ) ?
+			     bzimg->bzhdr.initrd_addr_max : BZI_INITRD_MAX );
+
+	/* Extract command line size */
+	bzimg->cmdline_size = ( ( bzimg->version >= 0x0206 ) ?
+				bzimg->bzhdr.cmdline_size : BZI_CMDLINE_SIZE );
+
+	DBGC ( image, "bzImage %p version %04x RM %#lx+%#zx PM %#lx+%#zx "
+	       "cmdlen %zd\n", image, bzimg->version,
+	       user_to_phys ( bzimg->rm_kernel, 0 ), bzimg->rm_filesz,
+	       user_to_phys ( bzimg->pm_kernel, 0 ), bzimg->pm_sz,
+	       bzimg->cmdline_size );
+
+	return 0;
+}
+
+/**
+ * Update bzImage header in loaded kernel
+ *
+ * @v image		bzImage file
+ * @v bzimg		bzImage context
+ * @v dst		bzImage to update
+ */
+static void bzimage_update_header ( struct image *image,
+				    struct bzimage_context *bzimg,
+				    userptr_t dst ) {
+
+	/* Set loader type */
+	if ( bzimg->version >= 0x0200 )
+		bzimg->bzhdr.type_of_loader = BZI_LOADER_TYPE_IPXE;
+
+	/* Set heap end pointer */
+	if ( bzimg->version >= 0x0201 ) {
+		bzimg->bzhdr.heap_end_ptr = ( bzimg->rm_heap - 0x200 );
+		bzimg->bzhdr.loadflags |= BZI_CAN_USE_HEAP;
+	}
+
+	/* Set command line */
+	if ( bzimg->version >= 0x0202 ) {
+		bzimg->bzhdr.cmd_line_ptr = user_to_phys ( bzimg->rm_kernel,
+							   bzimg->rm_cmdline );
+	} else {
+		bzimg->cmdline_magic.magic = BZI_CMDLINE_MAGIC;
+		bzimg->cmdline_magic.offset = bzimg->rm_cmdline;
+		if ( bzimg->version >= 0x0200 )
+			bzimg->bzhdr.setup_move_size = bzimg->rm_memsz;
+	}
+
+	/* Set video mode */
+	bzimg->bzhdr.vid_mode = bzimg->vid_mode;
+
+	/* Set initrd address */
+	if ( bzimg->version >= 0x0200 ) {
+		bzimg->bzhdr.ramdisk_image = bzimg->ramdisk_image;
+		bzimg->bzhdr.ramdisk_size = bzimg->ramdisk_size;
+	}
+
+	/* Write out header structures */
+	copy_to_user ( dst, BZI_CMDLINE_OFFSET, &bzimg->cmdline_magic,
+		       sizeof ( bzimg->cmdline_magic ) );
+	copy_to_user ( dst, BZI_HDR_OFFSET, &bzimg->bzhdr,
+		       sizeof ( bzimg->bzhdr ) );
+
+	DBGC ( image, "bzImage %p vidmode %d\n", image, bzimg->vid_mode );
+}
+
+/**
+ * Parse kernel command line for bootloader parameters
+ *
+ * @v image		bzImage file
+ * @v bzimg		bzImage context
+ * @v cmdline		Kernel command line
+ * @ret rc		Return status code
+ */
+static int bzimage_parse_cmdline ( struct image *image,
+				   struct bzimage_context *bzimg,
+				   const char *cmdline ) {
+	char *vga;
+	char *mem;
+
+	/* Look for "vga=" */
+	if ( ( vga = strstr ( cmdline, "vga=" ) ) ) {
+		vga += 4;
+		if ( strcmp ( vga, "normal" ) == 0 ) {
+			bzimg->vid_mode = BZI_VID_MODE_NORMAL;
+		} else if ( strcmp ( vga, "ext" ) == 0 ) {
+			bzimg->vid_mode = BZI_VID_MODE_EXT;
+		} else if ( strcmp ( vga, "ask" ) == 0 ) {
+			bzimg->vid_mode = BZI_VID_MODE_ASK;
+		} else {
+			bzimg->vid_mode = strtoul ( vga, &vga, 0 );
+			if ( *vga && ( *vga != ' ' ) ) {
+				DBGC ( image, "bzImage %p strange \"vga=\""
+				       "terminator '%c'\n", image, *vga );
+			}
+		}
+	}
+
+	/* Look for "mem=" */
+	if ( ( mem = strstr ( cmdline, "mem=" ) ) ) {
+		mem += 4;
+		bzimg->mem_limit = strtoul ( mem, &mem, 0 );
+		switch ( *mem ) {
+		case 'G':
+		case 'g':
+			bzimg->mem_limit <<= 10;
+		case 'M':
+		case 'm':
+			bzimg->mem_limit <<= 10;
+		case 'K':
+		case 'k':
+			bzimg->mem_limit <<= 10;
+			break;
+		case '\0':
+		case ' ':
+			break;
+		default:
+			DBGC ( image, "bzImage %p strange \"mem=\" "
+			       "terminator '%c'\n", image, *mem );
+			break;
+		}
+		bzimg->mem_limit -= 1;
+	}
+
+	return 0;
+}
+
+/**
+ * Set command line
+ *
+ * @v image		bzImage image
+ * @v bzimg		bzImage context
+ * @v cmdline		Kernel command line
+ */
+static void bzimage_set_cmdline ( struct image *image,
+				  struct bzimage_context *bzimg,
+				  const char *cmdline ) {
+	size_t cmdline_len;
+
+	/* Copy command line down to real-mode portion */
+	cmdline_len = ( strlen ( cmdline ) + 1 );
+	if ( cmdline_len > bzimg->cmdline_size )
+		cmdline_len = bzimg->cmdline_size;
+	copy_to_user ( bzimg->rm_kernel, bzimg->rm_cmdline,
+		       cmdline, cmdline_len );
+	DBGC ( image, "bzImage %p command line \"%s\"\n", image, cmdline );
+}
+
+/**
+ * Parse standalone image command line for cpio parameters
+ *
+ * @v image		bzImage file
+ * @v cpio		CPIO header
+ * @v cmdline		Command line
+ */
+static void bzimage_parse_cpio_cmdline ( struct image *image,
+					 struct cpio_header *cpio,
+					 const char *cmdline ) {
+	char *arg;
+	char *end;
+	unsigned int mode;
+
+	/* Look for "mode=" */
+	if ( ( arg = strstr ( cmdline, "mode=" ) ) ) {
+		arg += 5;
+		mode = strtoul ( arg, &end, 8 /* Octal for file mode */ );
+		if ( *end && ( *end != ' ' ) ) {
+			DBGC ( image, "bzImage %p strange \"mode=\""
+			       "terminator '%c'\n", image, *end );
+		}
+		cpio_set_field ( cpio->c_mode, ( 0100000 | mode ) );
+	}
+}
+
+/**
+ * Align initrd length
+ *
+ * @v len		Length
+ * @ret len		Length rounded up to INITRD_ALIGN
+ */
+static inline size_t bzimage_align ( size_t len ) {
+
+	return ( ( len + INITRD_ALIGN - 1 ) & ~( INITRD_ALIGN - 1 ) );
+}
+
+/**
+ * Load initrd
+ *
+ * @v image		bzImage image
+ * @v initrd		initrd image
+ * @v address		Address at which to load, or UNULL
+ * @ret len		Length of loaded image, excluding zero-padding
+ */
+static size_t bzimage_load_initrd ( struct image *image,
+				    struct image *initrd,
+				    userptr_t address ) {
+	char *filename = initrd->cmdline;
+	char *cmdline;
+	struct cpio_header cpio;
+	size_t offset;
+	size_t name_len;
+	size_t pad_len;
+
+	/* Do not include kernel image itself as an initrd */
+	if ( initrd == image )
+		return 0;
+
+	/* Create cpio header for non-prebuilt images */
+	if ( filename && filename[0] ) {
+		cmdline = strchr ( filename, ' ' );
+		name_len = ( ( cmdline ? ( ( size_t ) ( cmdline - filename ) )
+			       : strlen ( filename ) ) + 1 /* NUL */ );
+		memset ( &cpio, '0', sizeof ( cpio ) );
+		memcpy ( cpio.c_magic, CPIO_MAGIC, sizeof ( cpio.c_magic ) );
+		cpio_set_field ( cpio.c_mode, 0100644 );
+		cpio_set_field ( cpio.c_nlink, 1 );
+		cpio_set_field ( cpio.c_filesize, initrd->len );
+		cpio_set_field ( cpio.c_namesize, name_len );
+		if ( cmdline ) {
+			bzimage_parse_cpio_cmdline ( image, &cpio,
+						     ( cmdline + 1 /* ' ' */ ));
+		}
+		offset = ( ( sizeof ( cpio ) + name_len + 0x03 ) & ~0x03 );
+	} else {
+		offset = 0;
+		name_len = 0;
+	}
+
+	/* Copy in initrd image body (and cpio header if applicable) */
+	if ( address ) {
+		memmove_user ( address, offset, initrd->data, 0, initrd->len );
+		if ( offset ) {
+			memset_user ( address, 0, 0, offset );
+			copy_to_user ( address, 0, &cpio, sizeof ( cpio ) );
+			copy_to_user ( address, sizeof ( cpio ), filename,
+				       ( name_len - 1 /* NUL (or space) */ ) );
+		}
+		DBGC ( image, "bzImage %p initrd %p [%#08lx,%#08lx,%#08lx)"
+		       "%s%s\n", image, initrd, user_to_phys ( address, 0 ),
+		       user_to_phys ( address, offset ),
+		       user_to_phys ( address, ( offset + initrd->len ) ),
+		       ( filename ? " " : "" ), ( filename ? filename : "" ) );
+		DBGC2_MD5A ( image, user_to_phys ( address, offset ),
+			     user_to_virt ( address, offset ), initrd->len );
+	}
+	offset += initrd->len;
+
+	/* Zero-pad to next INITRD_ALIGN boundary */
+	pad_len = ( ( -offset ) & ( INITRD_ALIGN - 1 ) );
+	if ( address )
+		memset_user ( address, offset, 0, pad_len );
+
+	return offset;
+}
+
+/**
+ * Check that initrds can be loaded
+ *
+ * @v image		bzImage image
+ * @v bzimg		bzImage context
+ * @ret rc		Return status code
+ */
+static int bzimage_check_initrds ( struct image *image,
+				   struct bzimage_context *bzimg ) {
+	struct image *initrd;
+	userptr_t bottom;
+	size_t len = 0;
+	int rc;
+
+	/* Calculate total loaded length of initrds */
+	for_each_image ( initrd ) {
+
+		/* Skip kernel */
+		if ( initrd == image )
+			continue;
+
+		/* Calculate length */
+		len += bzimage_load_initrd ( image, initrd, UNULL );
+		len = bzimage_align ( len );
+
+		DBGC ( image, "bzImage %p initrd %p from [%#08lx,%#08lx)%s%s\n",
+		       image, initrd, user_to_phys ( initrd->data, 0 ),
+		       user_to_phys ( initrd->data, initrd->len ),
+		       ( initrd->cmdline ? " " : "" ),
+		       ( initrd->cmdline ? initrd->cmdline : "" ) );
+		DBGC2_MD5A ( image, user_to_phys ( initrd->data, 0 ),
+			     user_to_virt ( initrd->data, 0 ), initrd->len );
+	}
+
+	/* Calculate lowest usable address */
+	bottom = userptr_add ( bzimg->pm_kernel, bzimg->pm_sz );
+
+	/* Check that total length fits within space available for
+	 * reshuffling.  This is a conservative check, since CPIO
+	 * headers are not present during reshuffling, but this
+	 * doesn't hurt and keeps the code simple.
+	 */
+	if ( ( rc = initrd_reshuffle_check ( len, bottom ) ) != 0 ) {
+		DBGC ( image, "bzImage %p failed reshuffle check: %s\n",
+		       image, strerror ( rc ) );
+		return rc;
+	}
+
+	/* Check that total length fits within kernel's memory limit */
+	if ( user_to_phys ( bottom, len ) > bzimg->mem_limit ) {
+		DBGC ( image, "bzImage %p not enough space for initrds\n",
+		       image );
+		return -ENOBUFS;
+	}
+
+	return 0;
+}
+
+/**
+ * Load initrds, if any
+ *
+ * @v image		bzImage image
+ * @v bzimg		bzImage context
+ */
+static void bzimage_load_initrds ( struct image *image,
+				   struct bzimage_context *bzimg ) {
+	struct image *initrd;
+	struct image *highest = NULL;
+	struct image *other;
+	userptr_t top;
+	userptr_t dest;
+	size_t offset;
+	size_t len;
+
+	/* Reshuffle initrds into desired order */
+	initrd_reshuffle ( userptr_add ( bzimg->pm_kernel, bzimg->pm_sz ) );
+
+	/* Find highest initrd */
+	for_each_image ( initrd ) {
+		if ( ( highest == NULL ) ||
+		     ( userptr_sub ( initrd->data, highest->data ) > 0 ) ) {
+			highest = initrd;
+		}
+	}
+
+	/* Do nothing if there are no initrds */
+	if ( ! highest )
+		return;
+
+	/* Find highest usable address */
+	top = userptr_add ( highest->data, bzimage_align ( highest->len ) );
+	if ( user_to_phys ( top, 0 ) > bzimg->mem_limit )
+		top = phys_to_user ( bzimg->mem_limit );
+	DBGC ( image, "bzImage %p loading initrds from %#08lx downwards\n",
+	       image, user_to_phys ( top, 0 ) );
+
+	/* Load initrds in order */
+	for_each_image ( initrd ) {
+
+		/* Calculate cumulative length of following
+		 * initrds (including padding).
+		 */
+		offset = 0;
+		for_each_image ( other ) {
+			if ( other == initrd )
+				offset = 0;
+			offset += bzimage_load_initrd ( image, other, UNULL );
+			offset = bzimage_align ( offset );
+		}
+
+		/* Load initrd at this address */
+		dest = userptr_add ( top, -offset );
+		len = bzimage_load_initrd ( image, initrd, dest );
+
+		/* Record initrd location */
+		if ( ! bzimg->ramdisk_image )
+			bzimg->ramdisk_image = user_to_phys ( dest, 0 );
+		bzimg->ramdisk_size = ( user_to_phys ( dest, len ) -
+					bzimg->ramdisk_image );
+	}
+	DBGC ( image, "bzImage %p initrds at [%#08lx,%#08lx)\n",
+	       image, bzimg->ramdisk_image,
+	       ( bzimg->ramdisk_image + bzimg->ramdisk_size ) );
+}
+
+/**
+ * Execute bzImage image
+ *
+ * @v image		bzImage image
+ * @ret rc		Return status code
+ */
+static int bzimage_exec ( struct image *image ) {
+	struct bzimage_context bzimg;
+	const char *cmdline = ( image->cmdline ? image->cmdline : "" );
+	int rc;
+
+	/* Read and parse header from image */
+	if ( ( rc = bzimage_parse_header ( image, &bzimg,
+					   image->data ) ) != 0 )
+		return rc;
+
+	/* Prepare segments */
+	if ( ( rc = prep_segment ( bzimg.rm_kernel, bzimg.rm_filesz,
+				   bzimg.rm_memsz ) ) != 0 ) {
+		DBGC ( image, "bzImage %p could not prepare RM segment: %s\n",
+		       image, strerror ( rc ) );
+		return rc;
+	}
+	if ( ( rc = prep_segment ( bzimg.pm_kernel, bzimg.pm_sz,
+				   bzimg.pm_sz ) ) != 0 ) {
+		DBGC ( image, "bzImage %p could not prepare PM segment: %s\n",
+		       image, strerror ( rc ) );
+		return rc;
+	}
+
+	/* Parse command line for bootloader parameters */
+	if ( ( rc = bzimage_parse_cmdline ( image, &bzimg, cmdline ) ) != 0)
+		return rc;
+
+	/* Check that initrds can be loaded */
+	if ( ( rc = bzimage_check_initrds ( image, &bzimg ) ) != 0 )
+		return rc;
+
+	/* Remove kernel from image list (without invalidating image pointer) */
+	unregister_image ( image_get ( image ) );
+
+	/* Load segments */
+	memcpy_user ( bzimg.rm_kernel, 0, image->data,
+		      0, bzimg.rm_filesz );
+	memcpy_user ( bzimg.pm_kernel, 0, image->data,
+		      bzimg.rm_filesz, bzimg.pm_sz );
+
+	/* Store command line */
+	bzimage_set_cmdline ( image, &bzimg, cmdline );
+
+	/* Prepare for exiting.  Must do this before loading initrds,
+	 * since loading the initrds will corrupt the external heap.
+	 */
+	shutdown_boot();
+
+	/* Load any initrds */
+	bzimage_load_initrds ( image, &bzimg );
+
+	/* Update kernel header */
+	bzimage_update_header ( image, &bzimg, bzimg.rm_kernel );
+
+	DBGC ( image, "bzImage %p jumping to RM kernel at %04x:0000 "
+	       "(stack %04x:%04zx)\n", image, ( bzimg.rm_kernel_seg + 0x20 ),
+	       bzimg.rm_kernel_seg, bzimg.rm_heap );
+
+	/* 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" )
+			       : : "r" ( bzimg.rm_kernel_seg ),
+			           "r" ( bzimg.rm_heap ),
+			           "r" ( bzimg.rm_kernel_seg + 0x20 ) );
+
+	/* There is no way for the image to return, since we provide
+	 * no return address.
+	 */
+	assert ( 0 );
+
+	return -ECANCELED; /* -EIMPOSSIBLE */
+}
+
+/**
+ * Probe bzImage image
+ *
+ * @v image		bzImage file
+ * @ret rc		Return status code
+ */
+int bzimage_probe ( struct image *image ) {
+	struct bzimage_context bzimg;
+	int rc;
+
+	/* Read and parse header from image */
+	if ( ( rc = bzimage_parse_header ( image, &bzimg,
+					   image->data ) ) != 0 )
+		return rc;
+
+	return 0;
+}
+
+/** Linux bzImage image type */
+struct image_type bzimage_image_type __image_type ( PROBE_NORMAL ) = {
+	.name = "bzImage",
+	.probe = bzimage_probe,
+	.exec = bzimage_exec,
+};