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-rw-r--r--gpxe/src/arch/i386/image/bzimage.c483
1 files changed, 234 insertions, 249 deletions
diff --git a/gpxe/src/arch/i386/image/bzimage.c b/gpxe/src/arch/i386/image/bzimage.c
index 47d46ca4..19450990 100644
--- a/gpxe/src/arch/i386/image/bzimage.c
+++ b/gpxe/src/arch/i386/image/bzimage.c
@@ -16,6 +16,8 @@
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
+FILE_LICENCE ( GPL2_OR_LATER );
+
/**
* @file
*
@@ -42,9 +44,11 @@ FEATURE ( FEATURE_IMAGE, "bzImage", DHCP_EB_FEATURE_BZIMAGE, 1 );
struct image_type bzimage_image_type __image_type ( PROBE_NORMAL );
/**
- * bzImage load context
+ * bzImage context
*/
-struct bzimage_load_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 */
@@ -55,28 +59,14 @@ struct bzimage_load_context {
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;
-};
-
-/**
- * bzImage execution context
- */
-struct bzimage_exec_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 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;
/** Video mode */
unsigned int vid_mode;
/** Memory limit */
@@ -85,18 +75,178 @@ struct bzimage_exec_context {
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_GPXE;
+
+ /* 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;
+ 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 exec_ctx Execution context
+ * @v bzimg bzImage 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,
+ struct bzimage_context *bzimg,
const char *cmdline ) {
char *vga;
char *mem;
@@ -105,13 +255,13 @@ static int bzimage_parse_cmdline ( struct image *image,
if ( ( vga = strstr ( cmdline, "vga=" ) ) ) {
vga += 4;
if ( strcmp ( vga, "normal" ) == 0 ) {
- exec_ctx->vid_mode = BZI_VID_MODE_NORMAL;
+ bzimg->vid_mode = BZI_VID_MODE_NORMAL;
} else if ( strcmp ( vga, "ext" ) == 0 ) {
- exec_ctx->vid_mode = BZI_VID_MODE_EXT;
+ bzimg->vid_mode = BZI_VID_MODE_EXT;
} else if ( strcmp ( vga, "ask" ) == 0 ) {
- exec_ctx->vid_mode = BZI_VID_MODE_ASK;
+ bzimg->vid_mode = BZI_VID_MODE_ASK;
} else {
- exec_ctx->vid_mode = strtoul ( vga, &vga, 0 );
+ bzimg->vid_mode = strtoul ( vga, &vga, 0 );
if ( *vga && ( *vga != ' ' ) ) {
DBGC ( image, "bzImage %p strange \"vga=\""
"terminator '%c'\n", image, *vga );
@@ -122,17 +272,17 @@ static int bzimage_parse_cmdline ( struct image *image,
/* Look for "mem=" */
if ( ( mem = strstr ( cmdline, "mem=" ) ) ) {
mem += 4;
- exec_ctx->mem_limit = strtoul ( mem, &mem, 0 );
+ bzimg->mem_limit = strtoul ( mem, &mem, 0 );
switch ( *mem ) {
case 'G':
case 'g':
- exec_ctx->mem_limit <<= 10;
+ bzimg->mem_limit <<= 10;
case 'M':
case 'm':
- exec_ctx->mem_limit <<= 10;
+ bzimg->mem_limit <<= 10;
case 'K':
case 'k':
- exec_ctx->mem_limit <<= 10;
+ bzimg->mem_limit <<= 10;
break;
case '\0':
case ' ':
@@ -142,7 +292,7 @@ static int bzimage_parse_cmdline ( struct image *image,
"terminator '%c'\n", image, *mem );
break;
}
- exec_ctx->mem_limit -= 1;
+ bzimg->mem_limit -= 1;
}
return 0;
@@ -152,20 +302,20 @@ static int bzimage_parse_cmdline ( struct image *image,
* Set command line
*
* @v image bzImage image
- * @v exec_ctx Execution context
+ * @v bzimg bzImage 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,
+ 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 > exec_ctx->cmdline_size )
- cmdline_len = exec_ctx->cmdline_size;
- copy_to_user ( exec_ctx->rm_kernel, exec_ctx->rm_cmdline,
+ 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 );
@@ -217,14 +367,16 @@ static size_t bzimage_load_initrd ( struct image *image,
}
/* Copy in initrd image body */
+ if ( address )
+ memcpy_user ( address, offset, initrd->data, 0, initrd->len );
+ offset += initrd->len;
if ( address ) {
DBGC ( image, "bzImage %p has initrd %p at [%lx,%lx)\n",
- image, initrd, address, ( address + offset ) );
- memcpy_user ( address, offset, initrd->data, 0,
- initrd->len );
+ image, initrd, user_to_phys ( address, 0 ),
+ user_to_phys ( address, offset ) );
}
- offset += initrd->len;
+ /* Round up to 4-byte boundary */
offset = ( ( offset + 0x03 ) & ~0x03 );
return offset;
}
@@ -233,20 +385,19 @@ static size_t bzimage_load_initrd ( struct image *image,
* Load initrds, if any
*
* @v image bzImage image
- * @v exec_ctx Execution context
+ * @v bzimg bzImage context
* @ret rc Return status code
*/
static int bzimage_load_initrds ( struct image *image,
- struct bzimage_exec_context *exec_ctx ) {
+ struct bzimage_context *bzimg ) {
struct image *initrd;
size_t total_len = 0;
physaddr_t address;
int rc;
/* Add up length of all initrd images */
- for_each_image ( initrd ) {
+ for_each_image ( initrd )
total_len += bzimage_load_initrd ( image, initrd, UNULL );
- }
/* Give up if no initrd images found */
if ( ! total_len )
@@ -268,7 +419,7 @@ static int bzimage_load_initrds ( struct image *image,
return -ENOBUFS;
}
/* Check that we are within the kernel's range */
- if ( ( address + total_len - 1 ) > exec_ctx->mem_limit )
+ if ( ( address + total_len - 1 ) > bzimg->mem_limit )
continue;
/* Prepare and verify segment */
if ( ( rc = prep_segment ( phys_to_user ( address ), 0,
@@ -279,8 +430,8 @@ static int bzimage_load_initrds ( struct image *image,
}
/* Record initrd location */
- exec_ctx->ramdisk_image = address;
- exec_ctx->ramdisk_size = total_len;
+ bzimg->ramdisk_image = address;
+ bzimg->ramdisk_size = total_len;
/* Construct initrd */
DBGC ( image, "bzImage %p constructing initrd at [%lx,%lx)\n",
@@ -300,60 +451,37 @@ static int bzimage_load_initrds ( struct image *image,
* @ret rc Return status code
*/
static int bzimage_exec ( struct image *image ) {
- struct bzimage_exec_context exec_ctx;
- struct bzimage_header bzhdr;
+ struct bzimage_context bzimg;
const char *cmdline = ( image->cmdline ? image->cmdline : "" );
int rc;
- /* Initialise context */
- memset ( &exec_ctx, 0, sizeof ( exec_ctx ) );
-
- /* 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;
- if ( bzhdr.version >= 0x0203 ) {
- exec_ctx.mem_limit = bzhdr.initrd_addr_max;
- } else {
- exec_ctx.mem_limit = BZI_INITRD_MAX;
- }
- if ( bzhdr.version >= 0x0206 ) {
- exec_ctx.cmdline_size = bzhdr.cmdline_size;
- } else {
- exec_ctx.cmdline_size = BZI_CMDLINE_SIZE;
- }
- DBG ( "cmdline_size = %zd\n", exec_ctx.cmdline_size );
+ /* Read and parse header from loaded kernel */
+ if ( ( rc = bzimage_parse_header ( image, &bzimg,
+ image->priv.user ) ) != 0 )
+ return rc;
+ assert ( bzimg.rm_kernel == image->priv.user );
/* Parse command line for bootloader parameters */
- if ( ( rc = bzimage_parse_cmdline ( image, &exec_ctx, cmdline ) ) != 0)
+ if ( ( rc = bzimage_parse_cmdline ( image, &bzimg, cmdline ) ) != 0)
return rc;
/* Store command line */
- if ( ( rc = bzimage_set_cmdline ( image, &exec_ctx, cmdline ) ) != 0 )
+ if ( ( rc = bzimage_set_cmdline ( image, &bzimg, cmdline ) ) != 0 )
return rc;
/* Load any initrds */
- if ( ( rc = bzimage_load_initrds ( image, &exec_ctx ) ) != 0 )
+ if ( ( rc = bzimage_load_initrds ( image, &bzimg ) ) != 0 )
return rc;
- /* Update and store kernel header */
- bzhdr.vid_mode = exec_ctx.vid_mode;
- bzhdr.ramdisk_image = exec_ctx.ramdisk_image;
- bzhdr.ramdisk_size = exec_ctx.ramdisk_size;
- copy_to_user ( exec_ctx.rm_kernel, BZI_HDR_OFFSET, &bzhdr,
- sizeof ( bzhdr ) );
+ /* Update kernel header */
+ bzimage_update_header ( image, &bzimg, bzimg.rm_kernel );
/* Prepare for exiting */
shutdown ( SHUTDOWN_BOOT );
DBGC ( image, "bzImage %p jumping to RM kernel at %04x:0000 "
- "(stack %04x:%04zx)\n", image,
- ( exec_ctx.rm_kernel_seg + 0x20 ),
- exec_ctx.rm_kernel_seg, exec_ctx.rm_heap );
+ "(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"
@@ -365,9 +493,9 @@ static int bzimage_exec ( struct image *image ) {
"pushw %w2\n\t"
"pushw $0\n\t"
"lret\n\t" )
- : : "r" ( exec_ctx.rm_kernel_seg ),
- "r" ( exec_ctx.rm_heap ),
- "r" ( exec_ctx.rm_kernel_seg + 0x20 ) );
+ : : "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.
@@ -378,192 +506,49 @@ static int bzimage_exec ( struct image *image ) {
}
/**
- * Load and parse bzImage header
- *
- * @v image bzImage file
- * @v load_ctx Load context
- * @v bzhdr Buffer for bzImage header
- * @ret rc Return status code
- */
-static int bzimage_load_header ( struct image *image,
- struct bzimage_load_context *load_ctx,
- struct bzimage_header *bzhdr ) {
-
- /* Sanity check */
- if ( image->len < ( BZI_HDR_OFFSET + sizeof ( *bzhdr ) ) ) {
- DBGC ( image, "bzImage %p too short for kernel header\n",
- image );
- return -ENOEXEC;
- }
-
- /* Read and verify header */
- copy_from_user ( bzhdr, image->data, BZI_HDR_OFFSET,
- sizeof ( *bzhdr ) );
- if ( bzhdr->header != BZI_SIGNATURE ) {
- DBGC ( image, "bzImage %p bad signature %08x\n",
- image, bzhdr->header );
- return -ENOEXEC;
- }
-
- /* We don't support ancient kernels */
- if ( bzhdr->version < 0x0200 ) {
- DBGC ( image, "bzImage %p version %04x not supported\n",
- image, bzhdr->version );
- return -ENOTSUP;
- }
-
- /* Calculate load address and size of real-mode portion */
- load_ctx->rm_kernel_seg = ( ( bzhdr->loadflags & BZI_LOAD_HIGH ) ?
- 0x1000 : /* 1000:0000 (bzImage) */
- 0x9000 ); /* 9000:0000 (zImage) */
- load_ctx->rm_kernel = real_to_user ( load_ctx->rm_kernel_seg, 0 );
- load_ctx->rm_filesz =
- ( ( bzhdr->setup_sects ? bzhdr->setup_sects : 4 ) + 1 ) << 9;
- load_ctx->rm_memsz = BZI_ASSUMED_RM_SIZE;
- if ( load_ctx->rm_filesz > image->len ) {
- DBGC ( image, "bzImage %p too short for %zd byte of setup\n",
- image, load_ctx->rm_filesz );
- return -ENOEXEC;
- }
-
- /* 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
+ * Load bzImage image into memory
*
* @v image bzImage file
- * @v load_ctx Load context
* @ret rc Return status code
*/
-static int bzimage_load_real ( struct image *image,
- struct bzimage_load_context *load_ctx ) {
+int bzimage_load ( struct image *image ) {
+ struct bzimage_context bzimg;
int rc;
- /* Allow space for the stack and heap */
- load_ctx->rm_memsz += BZI_STACK_SIZE;
- load_ctx->rm_heap = load_ctx->rm_memsz;
+ /* Read and parse header from image */
+ if ( ( rc = bzimage_parse_header ( image, &bzimg,
+ image->data ) ) != 0 )
+ return rc;
- /* Allow space for the command line */
- load_ctx->rm_cmdline = load_ctx->rm_memsz;
- load_ctx->rm_memsz += BZI_CMDLINE_SIZE;
+ /* This is a bzImage image, valid or otherwise */
+ if ( ! image->type )
+ image->type = &bzimage_image_type;
- /* Prepare, verify, and load the real-mode segment */
- if ( ( rc = prep_segment ( load_ctx->rm_kernel, load_ctx->rm_filesz,
- load_ctx->rm_memsz ) ) != 0 ) {
+ /* 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;
}
- memcpy_user ( load_ctx->rm_kernel, 0, image->data, 0,
- load_ctx->rm_filesz );
-
- return 0;
-}
-
-/**
- * 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 ) {
+ 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;
}
- memcpy_user ( load_ctx->pm_kernel, 0, image->data, load_ctx->rm_filesz,
- load_ctx->pm_sz );
-
- return 0;
-}
-
-/**
- * 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;
-
- /* Update the header and copy it into the loaded kernel */
- bzhdr->type_of_loader = BZI_LOADER_TYPE_GPXE;
- if ( bzhdr->version >= 0x0201 ) {
- bzhdr->heap_end_ptr = ( load_ctx->rm_heap - 0x200 );
- bzhdr->loadflags |= BZI_CAN_USE_HEAP;
- }
- if ( bzhdr->version >= 0x0202 ) {
- bzhdr->cmd_line_ptr = user_to_phys ( load_ctx->rm_kernel,
- load_ctx->rm_cmdline );
- } else {
- 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;
- }
- 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;
- struct bzimage_header bzhdr;
- int rc;
-
- /* Initialise context */
- memset ( &load_ctx, 0, sizeof ( load_ctx ) );
- /* 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 */
- if ( ( rc = bzimage_load_real ( image, &load_ctx ) ) != 0 )
- return rc;
-
- /* Load non-real-mode portion */
- if ( ( rc = bzimage_load_non_real ( image, &load_ctx ) ) != 0 )
- return rc;
+ /* 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 );
/* Update and write out header */
- if ( ( rc = bzimage_write_header ( image, &load_ctx, &bzhdr ) ) != 0 )
- return rc;
+ bzimage_update_header ( image, &bzimg, bzimg.rm_kernel );
/* Record real-mode segment in image private data field */
- image->priv.ul = load_ctx.rm_kernel_seg;
+ image->priv.user = bzimg.rm_kernel;
return 0;
}