[PATCH 1/2] Add mkelfimage and support for generating kernel+initrd ELF payloads to OpenEmbedded

[PATCH 1/2] Add mkelfimage and support for generating kernel+initrd ELF payloads to OpenEmbedded

[Raymond Danks]

On x86, and ELF image file may be stored as a coreboot payload.  This 
image file may be a kernel or a kernel+initrd.

Documentation on this has been started on the coreboot wiki:
http://www.coreboot.org/Mkelfimage

We have seen success using the mkelfimage utility to construct a 
kernel+initrd image using the micro-image OpenEmbedded image as an initrd.
http://www.se-eng.com/wiki/index.php/Open_Embedded_Setup

The first patch contains the meta files for the mkelfimage utility in 
OpenEmbedded.
---
  recipes/mkelfimage/files/no-stack-protector.patch |   11 +++++++++++
  recipes/mkelfimage/mkelfimage-native_git.bb       |   11 +++++++++++
  recipes/mkelfimage/mkelfimage.inc                 |    3 +++
  recipes/mkelfimage/mkelfimage_git.bb              |   17 +++++++++++++++++
  4 files changed, 42 insertions(+), 0 deletions(-)
  create mode 100644 recipes/mkelfimage/files/no-stack-protector.patch
  create mode 100644 recipes/mkelfimage/mkelfimage-native_git.bb
  create mode 100644 recipes/mkelfimage/mkelfimage.inc
  create mode 100644 recipes/mkelfimage/mkelfimage_git.bb

diff --git a/recipes/mkelfimage/files/no-stack-protector.patch 
b/recipes/mkelfimage/files/no-stack-protector.patch
new file mode 100644
index 0000000..135de8d
--- /dev/null
+++ b/recipes/mkelfimage/files/no-stack-protector.patch
@@ -0,0 +1,11 @@
+--- mkelfImage/Makefile.orig    2011-06-17 15:20:46.816870941 -0600
++++ mkelfImage/Makefile    2011-06-17 15:20:59.619382362 -0600
+@@ -14,7 +14,7 @@
+ pkglibdir = $(libdir)/$(PACKAGE)
+ pkgincludedir = $(includedir)/$(PACKAGE)
+
+-CPPFLAGS=-DVERSION='"$(VERSION)"' -DRELEASE_DATE='"$(RELEASE_DATE)"' 
-I include
++CPPFLAGS=-fno-stack-protector -DVERSION='"$(VERSION)"' 
-DRELEASE_DATE='"$(RELEASE_DATE)"' -I include $(CFLAGS) $(LDFLAGS)
+ HOST_CPPFLAGS=$(CPPFLAGS)
+ I386_CPPFLAGS=$(CPPFLAGS) -I arch/i386/include
+ IA64_CPPFLAGS=$(CPPFLAGS) -I arch/ia64/include
diff --git a/recipes/mkelfimage/mkelfimage-native_git.bb 
b/recipes/mkelfimage/mkelfimage-native_git.bb
new file mode 100644
index 0000000..e2f251e
--- /dev/null
+++ b/recipes/mkelfimage/mkelfimage-native_git.bb
@@ -0,0 +1,11 @@
+require mkelfimage_${PV}.bb
+inherit native
+
+do_stage () {
+    install -m 0755 objdir/sbin/mkelfImage ${STAGING_BINDIR}/
+}
+
+do_install () {
+    :
+}
+
diff --git a/recipes/mkelfimage/mkelfimage.inc 
b/recipes/mkelfimage/mkelfimage.inc
new file mode 100644
index 0000000..e06ed67
--- /dev/null
+++ b/recipes/mkelfimage/mkelfimage.inc
@@ -0,0 +1,3 @@
+LICENSE = "GPLv2"
+DESCRIPTION = "A utility to create ELF boot images from Linux kernel 
images"
+SECTION = "console/utils"
diff --git a/recipes/mkelfimage/mkelfimage_git.bb 
b/recipes/mkelfimage/mkelfimage_git.bb
new file mode 100644
index 0000000..7855f58
--- /dev/null
+++ b/recipes/mkelfimage/mkelfimage_git.bb
@@ -0,0 +1,17 @@
+require mkelfimage.inc
+
+SRCREV = "c045b4cc458a62dbb1dd99ae6a9343e52d1fe1e0"
+PV = "1.0.0+gitr${SRCPV}"
+PR = "r1"
+
+S = "${WORKDIR}/git/util/mkelfImage"
+
+SRC_URI = 
"git://review.coreboot.org/p/coreboot;protocol=http;branch=master \
+       file://no-stack-protector.patch"
+
+DEFAULT_PREFERENCE = "1"
+
+inherit autotools
+
+SRC_URI[md5sum] = "719b22bdd34431203f9349250c67c5e3"
+SRC_URI[sha256sum] = 
"9186e6e7302f38c1f77b763f0f14843fabc873ac7c81ede8ee094a47055668b5"
-- 
1.7.0.4

Re: [PATCH 1/2] Add mkelfimage and support for generating kernel+initrd ELF payloads to OpenEmbedded

[Paul Menzel]

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Dear Raymond,


I am putting you in CC not knowing if you read the lists.


Am Freitag, den 15.07.2011, 10:55 -0600 schrieb Raymond Danks:

The correct commit summary is

	mkelfimage: Add version c045b4cc from Git (initial recipe)

> On x86, and ELF image file may be stored as a coreboot payload.  This 

s/and/an/

> image file may be a kernel or a kernel+initrd.
> 
> Documentation on this has been started on the coreboot wiki:
> http://www.coreboot.org/Mkelfimage
> 
> We have seen success using the mkelfimage utility to construct a 
> kernel+initrd image using the micro-image OpenEmbedded image as an initrd.
> http://www.se-eng.com/wiki/index.php/Open_Embedded_Setup

What is your build configuration for testing this recipe?

> The first patch contains the meta files for the mkelfimage utility in 
> OpenEmbedded.

Please remove that line above. The commit message should be describing
the commit only.

Unfortunately we cannot commit your patch, especially because your
Signed-off-by line is missing – you can add `-s` to the Git commands
`git commit` or `git format-patch` and your mailer mangled the patch by
automatic line breaks.

Please follow the commit policy [1] and it would be great if you could
send us a corrected patch [2].

> ---
>   recipes/mkelfimage/files/no-stack-protector.patch |   11 +++++++++++
>   recipes/mkelfimage/mkelfimage-native_git.bb       |   11 +++++++++++
>   recipes/mkelfimage/mkelfimage.inc                 |    3 +++
>   recipes/mkelfimage/mkelfimage_git.bb              |   17 +++++++++++++++++
>   4 files changed, 42 insertions(+), 0 deletions(-)
>   create mode 100644 recipes/mkelfimage/files/no-stack-protector.patch
>   create mode 100644 recipes/mkelfimage/mkelfimage-native_git.bb
>   create mode 100644 recipes/mkelfimage/mkelfimage.inc
>   create mode 100644 recipes/mkelfimage/mkelfimage_git.bb
> 
> diff --git a/recipes/mkelfimage/files/no-stack-protector.patch 
> b/recipes/mkelfimage/files/no-stack-protector.patch
> new file mode 100644
> index 0000000..135de8d
> --- /dev/null
> +++ b/recipes/mkelfimage/files/no-stack-protector.patch
> @@ -0,0 +1,11 @@
> +--- mkelfImage/Makefile.orig    2011-06-17 15:20:46.816870941 -0600
> ++++ mkelfImage/Makefile    2011-06-17 15:20:59.619382362 -0600

Please add a header describing this patch [3].

> +@@ -14,7 +14,7 @@
> + pkglibdir = $(libdir)/$(PACKAGE)
> + pkgincludedir = $(includedir)/$(PACKAGE)
> +
> +-CPPFLAGS=-DVERSION='"$(VERSION)"' -DRELEASE_DATE='"$(RELEASE_DATE)"' 
> -I include

Here you can see an automatic line break.

> ++CPPFLAGS=-fno-stack-protector -DVERSION='"$(VERSION)"' 
> -DRELEASE_DATE='"$(RELEASE_DATE)"' -I include $(CFLAGS) $(LDFLAGS)
> + HOST_CPPFLAGS=$(CPPFLAGS)
> + I386_CPPFLAGS=$(CPPFLAGS) -I arch/i386/include
> + IA64_CPPFLAGS=$(CPPFLAGS) -I arch/ia64/include

Please send that patch separately to the coreboot list if it is useful
for upstream. You should be able to use Gerrit and you also need a
Signed-off-by line [4].

> diff --git a/recipes/mkelfimage/mkelfimage-native_git.bb 
> b/recipes/mkelfimage/mkelfimage-native_git.bb
> new file mode 100644
> index 0000000..e2f251e
> --- /dev/null
> +++ b/recipes/mkelfimage/mkelfimage-native_git.bb
> @@ -0,0 +1,11 @@
> +require mkelfimage_${PV}.bb
> +inherit native
> +
> +do_stage () {

Please follow the style guide [5], i. e., no space before `()`.

> +    install -m 0755 objdir/sbin/mkelfImage ${STAGING_BINDIR}/
> +}

`do_stage ()` is deprecated [6].

> +
> +do_install () {
> +    :
> +}
> +
> diff --git a/recipes/mkelfimage/mkelfimage.inc 
> b/recipes/mkelfimage/mkelfimage.inc
> new file mode 100644
> index 0000000..e06ed67
> --- /dev/null
> +++ b/recipes/mkelfimage/mkelfimage.inc
> @@ -0,0 +1,3 @@
> +LICENSE = "GPLv2"
> +DESCRIPTION = "A utility to create ELF boot images from Linux kernel 
> images"
> +SECTION = "console/utils"

Please order those as in the style guide and please also add the
`HOMEPAGE` variable.

> diff --git a/recipes/mkelfimage/mkelfimage_git.bb 
> b/recipes/mkelfimage/mkelfimage_git.bb
> new file mode 100644
> index 0000000..7855f58
> --- /dev/null
> +++ b/recipes/mkelfimage/mkelfimage_git.bb
> @@ -0,0 +1,17 @@
> +require mkelfimage.inc
> +
> +SRCREV = "c045b4cc458a62dbb1dd99ae6a9343e52d1fe1e0"
> +PV = "1.0.0+gitr${SRCPV}"
> +PR = "r1"

We start with `r0`.

> +
> +S = "${WORKDIR}/git/util/mkelfImage"
> +
> +SRC_URI = 
> "git://review.coreboot.org/p/coreboot;protocol=http;branch=master \
> +       file://no-stack-protector.patch"
> +
> +DEFAULT_PREFERENCE = "1"

Not needed since this is the only recipe.

> +
> +inherit autotools
> +
> +SRC_URI[md5sum] = "719b22bdd34431203f9349250c67c5e3"
> +SRC_URI[sha256sum] = 
> "9186e6e7302f38c1f77b763f0f14843fabc873ac7c81ede8ee094a47055668b5"

Is that needed? There is no archive as far as I know.


Thanks,

Paul


[1] http://openembedded.org/index.php/Commit_Policy
[2] http://openembedded.org/index.php/How_to_submit_a_patch_to_OpenEmbedded
[3] http://openembedded.org/index.php/Commit_Patch_Message_Guidelines
[4] http://www.coreboot.org/Development_Guidelines
[5] http://openembedded.org/index.php/Styleguide
[6] http://openembedded.org/index.php/Legacy_staging

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Re: [PATCH 1/2] Add mkelfimage and support for generating kernel+initrd ELF payloads to OpenEmbedded

[Raymond Danks]

Thanks Paul.  I am putting together new patches to address your feedback 
on style guide, mailer line-feed, and patch format/commit policy.

As far as the build configuration this was tested on is concerned, this 
is Ubuntu 10.04 x86_64-linux targeting i686-oe-linux using a one-off of 
the i686-generic.conf machine targeting a 4MB flash part.

Thanks again,
Ray

On 07/15/2011 12:48 PM, Paul Menzel wrote:
> Dear Raymond,
>
>
> I am putting you in CC not knowing if you read the lists.
>
>
> Am Freitag, den 15.07.2011, 10:55 -0600 schrieb Raymond Danks:
>
> The correct commit summary is
>
> 	mkelfimage: Add version c045b4cc from Git (initial recipe)
>
>> On x86, and ELF image file may be stored as a coreboot payload.  This
> s/and/an/
>
>> image file may be a kernel or a kernel+initrd.
>>
>> Documentation on this has been started on the coreboot wiki:
>> http://www.coreboot.org/Mkelfimage
>>
>> We have seen success using the mkelfimage utility to construct a
>> kernel+initrd image using the micro-image OpenEmbedded image as an initrd.
>> http://www.se-eng.com/wiki/index.php/Open_Embedded_Setup
> What is your build configuration for testing this recipe?
>
>> The first patch contains the meta files for the mkelfimage utility in
>> OpenEmbedded.
> Please remove that line above. The commit message should be describing
> the commit only.
>
> Unfortunately we cannot commit your patch, especially because your
> Signed-off-by line is missing – you can add `-s` to the Git commands
> `git commit` or `git format-patch` and your mailer mangled the patch by
> automatic line breaks.
>
> Please follow the commit policy [1] and it would be great if you could
> send us a corrected patch [2].
>
>> ---
>>    recipes/mkelfimage/files/no-stack-protector.patch |   11 +++++++++++
>>    recipes/mkelfimage/mkelfimage-native_git.bb       |   11 +++++++++++
>>    recipes/mkelfimage/mkelfimage.inc                 |    3 +++
>>    recipes/mkelfimage/mkelfimage_git.bb              |   17 +++++++++++++++++
>>    4 files changed, 42 insertions(+), 0 deletions(-)
>>    create mode 100644 recipes/mkelfimage/files/no-stack-protector.patch
>>    create mode 100644 recipes/mkelfimage/mkelfimage-native_git.bb
>>    create mode 100644 recipes/mkelfimage/mkelfimage.inc
>>    create mode 100644 recipes/mkelfimage/mkelfimage_git.bb
>>
>> diff --git a/recipes/mkelfimage/files/no-stack-protector.patch
>> b/recipes/mkelfimage/files/no-stack-protector.patch
>> new file mode 100644
>> index 0000000..135de8d
>> --- /dev/null
>> +++ b/recipes/mkelfimage/files/no-stack-protector.patch
>> @@ -0,0 +1,11 @@
>> +--- mkelfImage/Makefile.orig    2011-06-17 15:20:46.816870941 -0600
>> ++++ mkelfImage/Makefile    2011-06-17 15:20:59.619382362 -0600
> Please add a header describing this patch [3].
>
>> +@@ -14,7 +14,7 @@
>> + pkglibdir = $(libdir)/$(PACKAGE)
>> + pkgincludedir = $(includedir)/$(PACKAGE)
>> +
>> +-CPPFLAGS=-DVERSION='"$(VERSION)"' -DRELEASE_DATE='"$(RELEASE_DATE)"'
>> -I include
> Here you can see an automatic line break.
>
>> ++CPPFLAGS=-fno-stack-protector -DVERSION='"$(VERSION)"'
>> -DRELEASE_DATE='"$(RELEASE_DATE)"' -I include $(CFLAGS) $(LDFLAGS)
>> + HOST_CPPFLAGS=$(CPPFLAGS)
>> + I386_CPPFLAGS=$(CPPFLAGS) -I arch/i386/include
>> + IA64_CPPFLAGS=$(CPPFLAGS) -I arch/ia64/include
> Please send that patch separately to the coreboot list if it is useful
> for upstream. You should be able to use Gerrit and you also need a
> Signed-off-by line [4].
>
>> diff --git a/recipes/mkelfimage/mkelfimage-native_git.bb
>> b/recipes/mkelfimage/mkelfimage-native_git.bb
>> new file mode 100644
>> index 0000000..e2f251e
>> --- /dev/null
>> +++ b/recipes/mkelfimage/mkelfimage-native_git.bb
>> @@ -0,0 +1,11 @@
>> +require mkelfimage_${PV}.bb
>> +inherit native
>> +
>> +do_stage () {
> Please follow the style guide [5], i. e., no space before `()`.
>
>> +    install -m 0755 objdir/sbin/mkelfImage ${STAGING_BINDIR}/
>> +}
> `do_stage ()` is deprecated [6].
>
>> +
>> +do_install () {
>> +    :
>> +}
>> +
>> diff --git a/recipes/mkelfimage/mkelfimage.inc
>> b/recipes/mkelfimage/mkelfimage.inc
>> new file mode 100644
>> index 0000000..e06ed67
>> --- /dev/null
>> +++ b/recipes/mkelfimage/mkelfimage.inc
>> @@ -0,0 +1,3 @@
>> +LICENSE = "GPLv2"
>> +DESCRIPTION = "A utility to create ELF boot images from Linux kernel
>> images"
>> +SECTION = "console/utils"
> Please order those as in the style guide and please also add the
> `HOMEPAGE` variable.
>
>> diff --git a/recipes/mkelfimage/mkelfimage_git.bb
>> b/recipes/mkelfimage/mkelfimage_git.bb
>> new file mode 100644
>> index 0000000..7855f58
>> --- /dev/null
>> +++ b/recipes/mkelfimage/mkelfimage_git.bb
>> @@ -0,0 +1,17 @@
>> +require mkelfimage.inc
>> +
>> +SRCREV = "c045b4cc458a62dbb1dd99ae6a9343e52d1fe1e0"
>> +PV = "1.0.0+gitr${SRCPV}"
>> +PR = "r1"
> We start with `r0`.
>
>> +
>> +S = "${WORKDIR}/git/util/mkelfImage"
>> +
>> +SRC_URI =
>> "git://review.coreboot.org/p/coreboot;protocol=http;branch=master \
>> +       file://no-stack-protector.patch"
>> +
>> +DEFAULT_PREFERENCE = "1"
> Not needed since this is the only recipe.
>
>> +
>> +inherit autotools
>> +
>> +SRC_URI[md5sum] = "719b22bdd34431203f9349250c67c5e3"
>> +SRC_URI[sha256sum] =
>> "9186e6e7302f38c1f77b763f0f14843fabc873ac7c81ede8ee094a47055668b5"
> Is that needed? There is no archive as far as I know.
>
>
> Thanks,
>
> Paul
>
>
> [1] http://openembedded.org/index.php/Commit_Policy
> [2] http://openembedded.org/index.php/How_to_submit_a_patch_to_OpenEmbedded
> [3] http://openembedded.org/index.php/Commit_Patch_Message_Guidelines
> [4] http://www.coreboot.org/Development_Guidelines
> [5] http://openembedded.org/index.php/Styleguide
> [6] http://openembedded.org/index.php/Legacy_staging

[PATCH 1/2 v2] mkelfimage: Add version c045b4cc from Git (initial recipe)

[Raymond Danks]

On x86, and ELF image file may be stored as a coreboot payload.  This image file may be a kernel or a kernel+initrd.

Documentation on this has been started on the coreboot wiki:
http://www.coreboot.org/Mkelfimage

We have seen success using the mkelfimage utility to construct a kernel+initrd image using the micro-image OpenEmbedded image as an initrd.
http://www.se-eng.com/wiki/index.php/Open_Embedded_Setup

Build tested using Ubuntu 10.04 x86_64-linux targeting i686-oe-linux using a one-off of the i686-generic.conf machine targeting a 4MB flash part.

Signed-off-by: Raymond Danks <ray.danks@se-eng.com>
---
v2:
 * Updated meta files to adhere to StyleGuide
   - No need for separate target and native .bb files anymore.
   - Remove .inc
 * Document no-stack-protector.patch
 * Update commit summary and log.
 * Add Signed-off-by

 recipes/mkelfimage/files/no-stack-protector.patch |   17 +++++++++++++++++
 recipes/mkelfimage/mkelfimage_git.bb              |   18 ++++++++++++++++++
 2 files changed, 35 insertions(+), 0 deletions(-)
 create mode 100644 recipes/mkelfimage/files/no-stack-protector.patch
 create mode 100644 recipes/mkelfimage/mkelfimage_git.bb

diff --git a/recipes/mkelfimage/files/no-stack-protector.patch b/recipes/mkelfimage/files/no-stack-protector.patch
new file mode 100644
index 0000000..f81bf16
--- /dev/null
+++ b/recipes/mkelfimage/files/no-stack-protector.patch
@@ -0,0 +1,17 @@
+Gcc 4.1 comes with an SSP https://wiki.ubuntu.com/GccSsp
+
+This is disabled to work around '__stack_chk_fail' symbol not found failures in the mkelfimage build.
+
+http://www.coreboot.org/FAQ/Obsolete#How_do_I_fix_stack_chk_fail_errors.3F
+
+--- mkelfImage/Makefile.orig	2011-06-17 15:20:46.816870941 -0600
++++ mkelfImage/Makefile	2011-06-17 15:20:59.619382362 -0600
+@@ -14,7 +14,7 @@
+ pkglibdir = $(libdir)/$(PACKAGE)
+ pkgincludedir = $(includedir)/$(PACKAGE)
+ 
+-CPPFLAGS=-DVERSION='"$(VERSION)"' -DRELEASE_DATE='"$(RELEASE_DATE)"' -I include
++CPPFLAGS=-fno-stack-protector -DVERSION='"$(VERSION)"' -DRELEASE_DATE='"$(RELEASE_DATE)"' -I include $(CFLAGS) $(LDFLAGS)
+ HOST_CPPFLAGS=$(CPPFLAGS)
+ I386_CPPFLAGS=$(CPPFLAGS) -I arch/i386/include
+ IA64_CPPFLAGS=$(CPPFLAGS) -I arch/ia64/include
diff --git a/recipes/mkelfimage/mkelfimage_git.bb b/recipes/mkelfimage/mkelfimage_git.bb
new file mode 100644
index 0000000..2184f81
--- /dev/null
+++ b/recipes/mkelfimage/mkelfimage_git.bb
@@ -0,0 +1,18 @@
+DESCRIPTION = "A utility to create ELF boot images from Linux kernel images"
+HOMEPAGE = "http://www.coreboot.org/Mkelfimage"
+SECTION = "devel"
+LICENSE = "GPLv2"
+
+SRCREV = "c045b4cc458a62dbb1dd99ae6a9343e52d1fe1e0"
+PV = "1.0.0+gitr${SRCPV}"
+PR = "r0"
+
+SRC_URI = "git://review.coreboot.org/p/coreboot;protocol=http;branch=master \
+	   file://no-stack-protector.patch"
+
+S = "${WORKDIR}/git/util/mkelfImage"
+
+inherit autotools
+
+NATIVE_INSTALL_WORKS = "1"
+BBCLASSEXTEND = "native"
-- 
1.7.0.4

[PATCH 2/2 v2] conf/bitbake.conf: Add support for generating kernel+initrd ELF coreboot payloads

[Raymond Danks]

On x86, and ELF image file may be stored as a coreboot payload.  This image file may be a kernel or a kernel+initrd.

Documentation on this has been started on the coreboot wiki:
http://www.coreboot.org/Mkelfimage

We have seen success using the mkelfimage utility to construct a kernel+initrd image using the micro-image OpenEmbedded image as an initrd.
http://www.se-eng.com/wiki/index.php/Open_Embedded_Setup

To use, set a new type "elf" to IMAGE_FSTYPES in conf/local.conf on x86 targets:
IMAGE_FSTYPES = "cpio.gz elf"

You may also override the kernel parameters that are embedded in the elf file:
IMAGE_KERNELPARAMS = "ramdisk_size=32768 root=/dev/ram0 rw console="

The image binary ${TMPDIR}/deploy/images/${MACHINE}/*.elf may be added to the coreboot configuration in Kconfig (CONFIG_PAYLOAD_FILE)

Signed-off-by: Raymond Danks <ray.danks@se-eng.com>
---
v2:
 * Update commit summary and log.
   - Include test and usage steps.
 * Add Signed-off-by

 conf/bitbake.conf |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/conf/bitbake.conf b/conf/bitbake.conf
index 66dfaba..1ab72e1 100644
--- a/conf/bitbake.conf
+++ b/conf/bitbake.conf
@@ -375,6 +375,7 @@ IMAGE_BASENAME = "${PN}"
 IMAGE_NAME = "${IMAGE_BASENAME}-${MACHINE}-${DATETIME}"
 IMAGE_LINK_NAME = "${IMAGE_BASENAME}-${MACHINE}"
 IMAGE_EXTRA_SPACE = 10240
+IMAGE_KERNELPARAMS = "ramdisk_size=32768 root=/dev/ram0 rw console="
 
 UBI_VOLNAME ?= "${MACHINE}-rootfs"
 
@@ -406,6 +407,7 @@ IMAGE_CMD_cpio.gz.u-boot = "type cpio >/dev/null; cd ${IMAGE_ROOTFS} && (find .
 IMAGE_CMD_cpio.lzma = "type cpio >/dev/null; cd ${IMAGE_ROOTFS} && (find . | cpio -o -H newc | xz --format=lzma -c ${XZ_COMPRESSION_LEVEL} --check=${XZ_INTEGRITY_CHECK} >${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.rootfs.cpio.lzma) ${EXTRA_IMAGECMD}"
 IMAGE_CMD_ubi = "echo \[ubifs\] > ubinize.cfg ; echo mode=ubi >> ubinize.cfg ; echo image=${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.ubifs.img >> ubinize.cfg ; echo vol_id=0 >> ubinize.cfg ; echo vol_type=dynamic >> ubinize.cfg ; echo vol_name=${UBI_VOLNAME} >> ubinize.cfg ; echo vol_flags=autoresize >> ubinize.cfg;mkfs.ubifs -r ${IMAGE_ROOTFS} -o ${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.ubifs.img ${MKUBIFS_ARGS} && ubinize -o ${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.rootfs.ubi ${UBINIZE_ARGS} ubinize.cfg"
 IMAGE_CMD_ubifs = "mkfs.ubifs -r ${IMAGE_ROOTFS} -o ${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.ubifs.img ${MKUBIFS_ARGS}"
+IMAGE_CMD_elf = "type cpio >/dev/null; cd ${IMAGE_ROOTFS} && (find . | cpio -o -H newc | gzip -c -9 >${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.rootfs.cpio.gz) ; rm -f ${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.rootfs.elf ;  mkelfImage --append='${IMAGE_KERNELPARAMS}' --kernel=${STAGING_DIR}/${MACHINE}${HOST_VENDOR}-${HOST_OS}/kernel/bzImage --initrd=${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.rootfs.cpio.gz --output=${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.rootfs.elf ${EXTRA_IMAGECMD}"
 
 EXTRA_IMAGECMD = ""
 EXTRA_IMAGECMD_jffs2 = ""
@@ -440,6 +442,7 @@ IMAGE_DEPENDS_squashfs = "squashfs-tools-native"
 IMAGE_DEPENDS_squashfs-lzma = "squashfs-tools-native"
 IMAGE_DEPENDS_ubi = "mtd-utils-native"
 IMAGE_DEPENDS_ubifs = "mtd-utils-native"
+IMAGE_DEPENDS_elf = "virtual/kernel mkelfimage-native"
 
 EXTRA_IMAGEDEPENDS = ""
 
-- 
1.7.0.4