嵌入式-Linux-项目指南-使用-Yocto-项目-全-

构建系统

SRC_URI = "file://helloworld.c"

S = "${WORKDIR}"

SRC_URI = "file://helloworld.c"
DEPENDS = "lttng-ust"

S = "${WORKDIR}"

$ ls sources/meta-fsl*/conf/machine/*.conf


$ sudo apt-get install gawk wget git-core diffstat unzip texinfo gcc- multilib build-essential chrpath socat libsdl1.2-dev xterm make xsltproc docbook-utils fop dblatex xmlto autoconf automake libtool libglib2.0-dev python-gtk2 bsdmainutils screen


noatime,barrier=0,commit=6000.

$ sudo install -o $(id -u) -g $(id -g) -d /opt/yocto
$ cd /opt/yocto
$ git clone --branch dizzy git://git.yoctoproject.org/poky


$ cd /opt/yocto/poky
$ source oe-init-build-env qemuarm


$ source oe-init-build-env-memres 12345 qemuarm


$ bitbake -m


$ cd /opt/yocto/poky/qemuarm
$ rm -Rf tmp sstate-cache


$ TEMPLATECONF=meta-custom/config source oe-init-build-env <build- dir>


$ cd /opt/yocto/poky
$ ls meta*/recipes*/images/*.bb


$ cd /opt/yocto/poky/qemuarm
$ MACHINE=qemuarm bitbake core-image-minimal


$ export MACHINE=qemuarm


- #MACHINE ?= "qemuarm"
+ MACHINE ?= "qemuarm"

$ bitbake core-image-minimal


INHERIT += "rm_work"

RM_WORK_EXCLUDE += "linux-yocto u-boot"

RM_OLD_IMAGE = "1"

$ runqemu qemuarm core-image-minimal


ACCEPT_FSL_EULA = "1"

$ sudo curl http://commondatastorage.googleapis.com/git-repo- downloads/repo > /usr/local/sbin/repo
$ sudo chmod a+x /usr/local/sbin/repo


<?xml version="1.0" encoding="UTF-8"?>
<manifest>
  <default sync-j="4" revision="master"/>
  <remote fetch="git://git.yoctoproject.org" name="yocto"/>
  <remote fetch="git://github.com/Freescale" name="freescale"/>
  <remote fetch="git://git.openembedded.org" name="oe"/>
  <project remote="yocto" revision="dizzy" name="poky" path="sources/poky"/>
  <project remote="yocto" revision="dizzy" name="meta-fsl-arm" path="sources/meta-fsl-arm"/>
  <project remote="oe" revision="dizzy" name="meta-openembedded" path="sources/meta-openembedded"/>
  <project remote="freescale" revision="dizzy" name="fsl- community-bsp-base" path="sources/base">
        <copyfile dest="README" src="img/README"/>
        <copyfile dest="setup-environment" src="img/setup- environment"/>
  </project>
  <project remote="freescale" revision="dizzy" name="meta-fsl-arm- extra" path="sources/meta-fsl-arm-extra"/>
  <project remote="freescale" revision="dizzy" name="meta-fsl- demos" path="sources/meta-fsl-demos"/>
  <project remote="freescale" revision="dizzy" name="Documentation" path="sources/Documentation"/>
</manifest>

$ mkdir /opt/yocto/fsl-community-bsp
$ cd /opt/yocto/fsl-community-bsp
$ repo init -u https://github.com/Freescale/fsl-community-bsp- platform -b dizzy
$ repo sync


$ ls sources/meta-fsl*/conf/machine/*.conf


$ ls sources/meta-fsl*/recipes*/images/*.bb


$ cd /opt/yocto/fsl-community-bsp
$ mkdir -p wandboard-quad
$ MACHINE=wandboard-quad source setup-environment wandboard-quad
$ bitbake core-image-minimal


$ cd /opt/yocto/fsl-community-bsp/
$ source setup-environment wandboard-quad


$ cd /opt/yocto/fsl-community-bsp/wandboard- quad/tmp/deploy/images/wandboard-quad/
$ sudo dd if=core-image-minimal.sdcard of=/dev/sdN bs=1M && sync


Bus 002 Device 006: ID 15a2:0054 Freescale Semiconductor, Inc. i.MX6Q SystemOnChip in RecoveryMode

$ minicom -D /dev/ttyS0 -b 115200


IMAGE_INSTALL_append = " dropbear"

$ ssh root@<ip_address>


$ sudo dd if=/dev/sdN of=/tmp/sdcard.img count=10


$ head /tmp/sdcard.img | hexdump
0000400 00d1 4020 0000 1780 0000 0000 f42c 177f


$ head u-boot-wandboard-quad.imx | hexdump
0000000 00d1 4020 0000 1780 0000 0000 f42c 177f


$ sudo apt-get install tftpd-hpa


$ sudo chmod 1777 /var/lib/tftpboot


$ cd /opt/yocto/fsl-community-bsp/wandboard- quad/tmp/deploy/images/wandboard-quad/
$ cp zImage-wandboard-quad.bin zImage-imx6q-wandboard.dtb /var/lib/tftpboot


$ sudo apt-get install nfs-kernel-server


$ sudo mkdir /nfsroot
$ cd /nfsroot
$ sudo tar xvf /opt/yocto/fsl-community-bsp/wandboard- quad/tmp/deploy/images/wandboard-quad/core-image-minimal-wandboard- quad.tar.bz2


/etc/exports:
/nfsroot/ *(rw,no_root_squash,async,no_subtree_check)


$ sudo service nfs-kernel-server restart


> dhcp


> setenv ipaddr <static_ip>


> setenv serverip <host_ip>


> setenv nfsroot /nfsroot


> setenv image zImage-wandboard-quad.bin
> setenv fdt_file zImage-imx6q-wandboard.dtb


> setenv ip_dyn no


> saveenv


> run netboot


DL_DIR ?= "${BSPDIR}/downloads/"

INHERIT += "own-mirrors"
SOURCE_MIRROR_URL = "http://example.com/my-source-mirror"

BB_GENERATE_MIRROR_TARBALLS = "1"

BB_FETCH_PREMIRRORONLY = "1"

SSTATE_MIRRORS ?= "\
     file://.* file:///nfs/local/mount/sstate/PATH"

EXTRA_IMAGE_FEATURES += "package-management"

PRSERV_HOST = "localhost:0"

$ bitbake-prserv --host <server_ip> --port <port> --start


PRSERV_HOST = "<server_ip>:<port>"

$ sudo apt-get install lighttpd


$ sudo mkdir /var/www/wandboard-quad
$ sudo ln -s /opt/yocto/fsl-community-bsp/wandboard- quad/tmp/deploy/rpm /var/www/wandboard-quad/rpm


$ sudo service lighttpd reload


$ bitbake package-index


# smart channel --add all type=rpm-md \ baseurl=http://<server_ip>/wandboard-quad/rpm/all

# smart channel --add wandboard_quad type=rpm-md \ baseurl=http://<server_ip>/wandboard-quad/rpm/wandboard_quad

# smart channel --add cortexa9hf_vfp_neon type=rpm-md \ baseurl=http://<server_ip>/wandboard- quad/rpm/cortexa9hf_vfp_neon


# smart update
# smart query <package_name>
# smart install <package_name>


PACKAGE_FEED_URIS = "http://<server_ip>/wandboard-quad"

INHERIT += "buildhistory"

BUILDHISTORY_COMMIT = "1"

BUILDHISTORY_FEATURES = "image"

BUILDHISTORY_IMAGE_FILES += "/path/to/file"

$ git rev-parse "HEAD@{1 month ago}" > .git/info/grafts


$ git filter-branch


$ git clone file://${tmpfs}/buildhistory buildhistory.new


$ rm -rf buildhistory
$ mv buildhistory.new buildhistory


USER_CLASSES ?= "buildstats"


Host Info: Linux agonzal 3.13.0-35-generic #62-Ubuntu SMP Fri Aug 15 01:58:42 UTC 2014 x86_64 x86_64
Build Started: 1411486841.52
Uncompressed Rootfs size: 6.2M  /opt/yocto/fsl-community- bsp/wandboard-quad/tmp/work/wandboard_quad-poky-linux- gnueabi/core-image-minimal/1.0-r0/rootfs
Elapsed time: 2878.26 seconds
CPU usage: 51.5%
EndIOinProgress: 0
EndReadsComp: 0
EndReadsMerged: 55289561
EndSectRead: 65147300
EndSectWrite: 250044353
EndTimeIO: 14415452
EndTimeReads: 10338443
EndTimeWrite: 750935284
EndWTimeIO: 816314180
EndWritesComp: 0
StartIOinProgress: 0
StartReadsComp: 0
StartReadsMerged: 52319544
StartSectRead: 59228240
StartSectWrite: 207536552
StartTimeIO: 13116200
StartTimeReads: 8831854
StartTimeWrite: 3861639688
StartWTimeIO: 3921064032
StartWritesComp: 0

$ ../sources/poky/scripts/pybootchartgui/pybootchartgui.py tmp/buildstats/core-image-minimal-wandboard-quad/ -o /tmp


$ find -name "*busybox*"


$ find -name "*busybox*.bb*"


$ bitbake -e | grep -w DISTRO_FEATURES


$ bitbake -e busybox | grep ^S=


$ bitbake -e <target> | grep ^WORKDIR=


$ bitbake -c devshell <target>


OE_TERMINAL = "screen"

$ bitbake -c listtasks <target>


$ bitbake -f <target>


$ bitbake -c compile -f <target>


 /opt/yocto/fsl-community-bsp/wandboard-quad/tmp/work/cortexa9hf- vfp-neon-poky-linux-gnueabi/busybox/1.22.1-r32/temp

inherit logging

bbdebug [123] "message"

$ bitbake --show-versions


$ bitbake -v <target>


$ bitbake -g <target>


$ bitbake -g <target> -I glibc


$ dot -Tps filename.dot -o outfile.ps


$ bitbake -g -u depexp <target>


$ bitbake -DDD <target>


INHERIT += "report-error"

$ send-error-report ${LOG_DIR}/error-report/error-report_${TSTAMP}


$ cd /opt/yocto/fsl-community-bsp/sources
$ git clone https://github.com/kergoth/bb.git


$ eval "$(/opt/yocto/fsl-community-bsp/sources/bb/bin/bb init -)"


$ cd /opt/yocto/fsl-community-bsp
$ source setup-environment wandboard-quad


$ bb contents <target>


$ bb search <pattern>


$ bb show -r <recipe> <variable>


$ source setup-environment wandboard-quad


$ yocto-layer create bsp-custom


meta-bsp-custom/
 conf/layer.conf
 COPYING.MIT
 README


LCONF_VERSION = "6"

BBPATH = "${TOPDIR}"
BSPDIR := "${@os.path.abspath(os.path.dirname(d.getVar('FILE', True)) + '/../..')}"

BBFILES ?= ""
BBLAYERS = " \
  ${BSPDIR}/sources/poky/meta \
  ${BSPDIR}/sources/poky/meta-yocto \
  \
  ${BSPDIR}/sources/meta-openembedded/meta-oe \
  ${BSPDIR}/sources/meta-openembedded/meta-multimedia \
  \
  ${BSPDIR}/sources/meta-fsl-arm \
  ${BSPDIR}/sources/meta-fsl-arm-extra \
  ${BSPDIR}/sources/meta-fsl-demos \
  ${BSPDIR}/sources/meta-bsp-custom \
"

BBFILES += "${LAYERDIR}/recipes-*/*/*.bb \
        ${LAYERDIR}/recipes-*/*/*.bbappend"

BBPATH .= ":${LAYERDIR}"

LAYERDEPENDS_bsp-custom = "fsl-arm"
LAYERVERSION_bsp-custom = "1"

include include/wandboard.inc

SOC_FAMILY = "mx6:mx6q:wandboard"

UBOOT_MACHINE = "wandboard_quad_config"

KERNEL_DEVICETREE = "imx6q-wandboard.dtb"

MACHINE_FEATURES += "bluetooth wifi"

MACHINE_EXTRA_RRECOMMENDS += " \
  bcm4329-nvram-config \
  bcm4330-nvram-config \
"

include conf/machine/include/wandboard.inc

SOC_FAMILY = "mx6:mx6q:wandboard"

UBOOT_MACHINE = "wandboard_quad_custom_config"

KERNEL_DEVICETREE = "imx6q-wandboard-custom.dtb"

MACHINE_FEATURES += "wifi"

dtb-$(CONFIG_ARCH_MXC) += \
+imx6q-wandboard-custom.dtb \

SRC_URI_append = " file://0001-ARM-dts-Add-wandboard-custom-dts- file.patch"

SRC_URI_append = " file://0001-boards-Add-wandboard-custom.patch"

FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:"

HAVE_TOUCHSCREEN=1

$ bitbake -c cleanall <target>


$ bitbake -c patch <target>


$ bitbake -c devshell <target>


$ bitbake -C compile <target>


$ bitbake -c compile <target>
$ bitbake <target>


$ rpm -i <package>


$ bitbake package-index


$ bitbake <target>


$ cd /opt/yocto/fsl-community-bsp/sources
$ find -name wandboard-quad.conf
./meta-fsl-arm-extra/conf/machine/wandboard-quad.conf


include conf/machine/include/imx-base.inc
include conf/machine/include/tune-cortexa9.inc

PREFERRED_PROVIDER_virtual/kernel ?= "linux-wandboard"
PREFERRED_VERSION_linux-wandboard ?= "3.10.17"

$ find tmp/work -name "*linux-wandboard*"
tmp/work/wandboard_quad-poky-linux-gnueabi/linux-wandboard


$ find -name "*linux*.bb"


$ find -path ./poky -prune -o -path ./meta-openembedded -prune -o -name "*linux*.bb"


$ cd /opt/yocto/fsl-community-bsp/
$ source setup-environment wandboard-quad
$ bitbake-layers show-recipes 'linux*'


PREFERRED_PROVIDER_u-boot ??= "u-boot-fslc"
PREFERRED_PROVIDER_virtual/bootloader ??= "u-boot-fslc"

# Copyright Packt Publishing 2015
WANDBOARD_GITHUB_MIRROR = "git://github.com/yoctocookbook/linux.git"
SRCBRANCH = "wandboard_imx_3.10.17_1.0.2_ga-dev"
SRCREV = "${AUTOREV}"

include linux-wandboard.inc
require recipes-kernel/linux/linux-dtb.inc

DEPENDS += "lzop-native bc-native"

# Wandboard branch - based on 3.10.17_1.0.2_ga from Freescale git
SRCBRANCH = "wandboard_imx_3.10.17_1.0.2_ga"
SRCREV = "be8d6872b5eb4c94c15dac36b028ce7f60472409"
LOCALVERSION = "-1.0.2-wandboard"

COMPATIBLE_MACHINE = "(wandboard)"

SUMMARY = "Linux kernel for Wandboard"
LICENSE = "GPLv2"
LIC_FILES_CHKSUM = "file://COPYING;md5=d7810fab7487fb0aad327b76f1be7cd7"

require recipes-kernel/linux/linux-imx.inc

# Put a local version until we have a true SRCREV to point to
SCMVERSION ?= "y"

SRCBRANCH ??= "master"
LOCALVERSION ?= "-${SRCBRANCH}"

# Allow override of WANDBOARD_GITHUB_MIRROR to make use of
# local repository easier
WANDBOARD_GITHUB_MIRROR ?= "git://github.com/wandboard- org/linux.git"

# SRC_URI for wandboard kernel
SRC_URI = "${WANDBOARD_GITHUB_MIRROR};branch=${SRCBRANCH} \
 file://defconfig \
" 

$ bitbake -e u-boot-fslc | grep ^SRC_URI=
SRC_URI="git://github.com/Freescale/u-boot- imx.git;branch=patches-2014.10"


$ cd /opt/yocto/
$ git clone git://github.com/Freescale/u-boot-imx.git
$ cd u-boot-imx


$ git checkout -b patches-2014.10 origin/patches-2014.10


$ source /opt/poky/1.7.1/environment-setup-armv7a-vfp-neon- poky-linux-gnueabi


$ make wandboard_quad_config


$ unset LDFLAGS CFLAGS CPPFLAGS


$ make CC="${CC}"


PLATFORM_LIBGCC := -L $(shell dirname `$(CC) $(CFLAGS) -print-libgcc- file-name`
) -lgcc


$ make CC="${CC}"


INHERIT += "externalsrc"
EXTERNALSRC_pn-u-boot-fslc = "/opt/yocto/u-boot-imx"
EXTERNALSRC_BUILD_pn-u-boot-fslc = "/opt/yocto/u-boot-imx"

$ cd /opt/yocto/fsl-community-bsp/
$ source setup-environment wandboard-quad
$ bitbake u-boot-fslc


- PV = "v2014.10+git${SRCPV}"
+ PV = "v2014.10"

diff --git a/board/wandboard/wandboard.c b/board/wandboard/wandboard.c
index 3c8b7a5d2d0a..a466d4c74b8f 100644
--- a/board/wandboard/wandboard.c
+++ b/board/wandboard/wandboard.c
@@ -404,7 +404,7 @@ int board_init(void)

 int checkboard(void)
 {
-       puts("Board: Wandboard\n");
+      puts("Board: Wandboard custom\n");

        return 0;
 }

# Copyright Packt Publishing 2015
FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}-${PV}:"
SRC_URI_append = " file://0001-wandboard-Change-board-info.patch"

$ bitbake -c cleanall virtual/bootloader


$ bitbake -c devshell virtual/bootloader


$ bitbake -C compile virtual/bootloader


sudo dd if=u-boot.imx of=/dev/sdN bs=512 seek=2 && sync

> setenv ipaddr <target_ip>
> setenv serverip <host_ip>
> tftp ${loadaddr} u-boot.imx


> mmc dev 0
> mmc part
Partition Map for MMC device 0  --   Partition Type: DOS
Part    Start Sector    Num Sectors     UUID            Type
 1     8192            16384           0003b9dd-01     0c
 2     24576           131072          0003b9dd-02     83


> setexpr filesizeblks $filesize / 0x200
> setexpr filesizeblks $filesizeblks + 1


> mmc write ${loadaddr} 0x2 ${filesizeblks}


$ git add --all .
$ git commit -s -m "Well thought commit message"


$ git format-patch -1 -o /opt/yocto/fsl-community- bsp/sources/meta-bsp-custom/recipes-bsp/u-boot/u-boot-fslc- v2014.10/


$ git checkout --orphan meta
$ git rm -rf .
$ git commit --allow-empty -m "Meta branch"


cfg/spidev.scc:
        define KFEATURE_DESCRIPTION "Enable SPI device support"
        kconf hardware spidev.cfg

cfg/spidev.cfg:
        CONFIG_SPI_SPIDEV=y

patches/fix.scc:
        patch fix.patch

patches/fix.patch

features/feature.scc
        define KFEATURE_DESCRIPTION "Enable feature"

        patch 0001-feature.patch

        include cfg/feature_dependency.scc
        kconf non-hardware feature.cfg

$ make ARCH=arm <platform>_defconfig


$ make ARCH=arm imx_v6_v7_defconfig


$ make ARCH=arm help


$ make ARCH=arm savedefconfig


$ cd /opt/yocto/fsl-community-bsp/sources
$ mkdir -p meta-bsp-custom/recipes-kernel/linux/linux-wandboard- 3.10.17/
$ cp meta-fsl-arm-extra/recipes-kernel/linux/linux-wandboard- 3.10.17/defconfig meta-bsp-custom/recipes-kernel/linux/linux- wandboard-3.10.17/

# Copyright Packt Publishing 2015
FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}-${PV}:"
SRC_URI_append = " file://defconfig"

$ bitbake -c configure virtual/kernel


$ bitbake -c menuconfig virtual/kernel


$ bitbake -e virtual/kernel | grep ^B=


$ sudo apt-get install git-core libncurses5 libncurses5-dev libelf- dev asciidoc binutils-dev qt3-dev-tools libqt3-mt-dev libncurses5 libncurses5-dev fakeroot build-essential crash kexec-tools makedumpfile libgtk2.0-dev libglib2.0-dev libglade2-dev


$ cd /opt/yocto/fsl-community-bsp/wandboard- quad/tmp/work/wandboard_quad-poky-linux-gnueabi/linux- wandboard/3.10.17-r0/git


$ make ARCH=arm xconfig


$ make ARCH=arm savedefconfig


$ cp defconfig /opt/yocto/fsl-community-bsp/sources/meta-bsp- custom/recipes-kernel/linux/linux-wandboard-3.10.17


$ cd /opt/yocto/fsl-community-bsp/
$ source setup-environment wandboard-quad
$ bitbake -c savedefconfig virtual/kernel


spidev.cfg:
  CONFIG_SPI_SPIDEV=y

$ bitbake -f -c kernel_configme linux-yocto


$ bitbake -c diffconfig linux-yocto


$ bitbake -f -c kernel_configcheck linux-yocto


$ cd /opt/yocto
$ git clone https://github.com/wandboard-org/linux.git linux-wandboard
$ cd linux-wandboard


$ git checkout -b wandboard_imx_3.10.17_1.0.2_ga origin/wandboard_imx_3.10.17_1.0.2_ga


$ source /opt/poky/1.7.1/environment-setup-armv7a-vfp-neon- poky-linux-gnueabi


$ cp /opt/yocto/fsl-community-bsp/sources/meta-bsp-custom/recipes-kernel/linux/linux-wandboard-3.10.17/defconfig arch/arm/configs/wandboard-quad_defconfig
$ make wandboard-quad_defconfig


$ make


$ unset LDFLAGS


$ make modules


$ make dtbs


$ cp arch/arm/boot/zImage arch/arm/boot/dts/imx6q- wandboard.dtb /var/lib/tftpboot
$ make LOADADDR=0x10800000 uImage
UBOOT_ENTRYPOINT_mx6  = "0x10008000"

$ make LOADADDR=0x10800000 uImage

$ sudo apt-get install u-boot-tools


UBOOT_ENTRYPOINT_mx6 = "0x10008000"


INHERIT += "externalsrc"
EXTERNALSRC_pn-linux-wandboard = "/opt/yocto/linux-wandboard"
EXTERNALSRC_BUILD_pn-linux-wandboard = "/opt/yocto/linux- wandboard"

$ cd /opt/yocto/fsl-community-bsp/
$ source setup-environment wandboard-quad
$ bitbake -c cleanall virtual/kernel


$ bitbake -c configure virtual/kernel


$ bitbake -c menuconfig virtual/kernel


$ bitbake -c devshell virtual/kernel


$ bitbake -C compile virtual/kernel


$ cd tmp/deploy/images/wandboard-quad/
$ cp zImage-wandboard-quad.bin zImage-imx6q-wandboard.dtb /var/lib/tftpboot


> bootz <kernel_addr> - <dtb_addr>


> tftp ${loadaddr} ${image}
> tftp ${fdt_addr} ${fdt_file}
> bootz ${loadaddr} - ${fdt_addr}


> bootm <kernel_addr> - <dtb_addr>


$ git add --all .
$ git commit -s -m "Well thought commit message"


$ git format-patch -1 -o /opt/yocto/fsl-community- bsp/sources/meta-bsp-custom/recipes-kernel/linux/linux- wandboard-3.10.17


obj-m:= hello_world.o

SRC := $(shell pwd)
all:
        $(MAKE) -C $(KERNEL_SRC) M=$(SRC)

modules_install:
        $(MAKE) -C $(KERNEL_SRC) M=$(SRC) modules_install

clean:
        rm -f *.o *~ core .depend .*.cmd *.ko *.mod.c
        rm -f Module.markers Module.symvers modules.order
        rm -rf .tmp_versions Modules.symvers

make -C $(KERNEL_SRC) M=$(SRC)

/ *
 * 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, see <http://www.gnu.org/licenses/>.
 */

#include <linux/module.h>

static int hello_world_init(void)
{
        printk("Hello world\n");
        return 0;
}

static void hello_world_exit(void)
{
        printk("Bye world\n");
}
module_init(hello_world_init);
module_exit(hello_world_exit);

MODULE_LICENSE("GPL v2");

$ source /opt/poky/1.7.1/environment-setup-armv7a-vfp-neon- poky-linux-gnueabi


$ KERNEL_SRC=/opt/yocto/linux-wandboard make


# Copyright (C) 2015 Packt Publishing.

SUMMARY = "Simplest hello world kernel module."
LICENSE = "GPLv2"
LIC_FILES_CHKSUM = "file://${COMMON_LICENSE_DIR}/GPL- 2.0;md5=801f80980d171dd6425610833a22dbe6"

inherit module

SRC_URI = " \
    file://hello_world.c \
    file://Makefile \
"

S = "${WORKDIR}"

COMPATIBLE_MACHINE = "(wandboard)"

$ bitbake hello-world


printk(KERN_INFO "[%s:%d] %pf -> var1: %d var2: %d\n", __FUNCTION__, __LINE__, __builtin_return_address(0), var1, var2);

$ echo 8 > /proc/sys/kernel/printk


$ dmesg -n 8


#define DEBUG

$ mount -t debugfs nodev /sys/kernel/debug


echo -n 'file <filename> +p' > /sys/kernel/debug/dynamic_debug/control


$ echo -n 'file <filename> line nnnn +p' > /sys/kernel/debug/dynamic_debug/control


$ awk '$3 != "=_"' /sys/kernel/debug/dynamic_debug/control


extern void printascii(const char *);
printascii("Literal string\n");

early_print("%08x\t%s\n", p->nr, p->name);

$grep __log_buf System.map
80f450c0 b __log_buf

x - PAGE_OFFSET + PHYS_OFFSET

config PAGE_OFFSET
        hex
        default 0x40000000 if VMSPLIT_1G
        default 0x80000000 if VMSPLIT_2G
        default 0xC0000000

$ echo b > /proc/sysrq-trigger


> md.l 0x10f450c0
10f450c0: 00000000 00000000 00210038 c6000000    ........8.!.....
10f450d0: 746f6f42 20676e69 756e694c 6e6f2078    Booting Linux on
10f450e0: 79687020 61636973 5043206c 78302055     physical CPU 0x
10f450f0: 00000030 00000000 00000000 00000000    0...............
10f45100: 009600a8 a6000000 756e694c 65762078    ........Linux ve
10f45110: 6f697372 2e33206e 312e3031 2e312d37    rsion 3.10.17-1.
10f45120: 2d322e30 646e6177 72616f62 62672b64    0.2-wandboard+gb
10f45130: 36643865 62323738 20626535 656c6128    e8d6872b5eb (ale
10f45140: 6f6c4078 696c2d67 2d78756e 612d7068    x@log-linux-hp-a
10f45150: 7a6e6f67 20296c61 63636728 72657620    gonzal) (gcc ver
10f45160: 6e6f6973 392e3420 2820312e 29434347    sion 4.9.1 (GCC)
10f45170: 23202920 4d532031 52502050 504d4545     ) #1 SMP PREEMP
10f45180: 75532054 6546206e 35312062 3a323120    T Sun Feb 15 12:
10f45190: 333a3733 45432037 30322054 00003531    37:37 CET 2015..
10f451a0: 00000000 00000000 00400050 82000000    ........P.@.....
10f451b0: 3a555043 4d524120 50203776 65636f72    CPU: ARMv7 Proce


ramoops.mem_address=0x30000000 ramoops.mem_size=0x200000


/etc/fstab:
pstore  /pstore  pstore  defaults  0  0

# mkdir /pstore
# mount /pstore

# echo b > /proc/sysrq-trigger


-r--r--r--  1 root root 4084 Sep 16 16:24 console-ramoops


SysRq : Resetting
CPU3: stopping
CPU: 3 PID: 0 Comm: swapper/3 Not tainted 3.14.0-rc4-1.0.0-wandboard-37774-g1eae
[<80014a30>] (unwind_backtrace) from [<800116cc>] (show_stack+0x10/0x14)
[<800116cc>] (show_stack) from [<806091f4>] (dump_stack+0x7c/0xbc)
[<806091f4>] (dump_stack) from [<80013990>] (handle_IPI+0x144/0x158)
[<80013990>] (handle_IPI) from [<800085c4>] (gic_handle_irq+0x58/0x5c)
[<800085c4>] (gic_handle_irq) from [<80012200>] (__irq_svc+0x40/0x70)
Exception stack(0xee4c1f50 to 0xee4c1f98)


$ mount -t debugfs nodev /sys/kernel/debug


$ cat /sys/kernel/debug/tracing/available_tracers
function_graph function nop


$ cat /sys/kernel/debug/tracing/current_tracer
nop


$ echo -n nop > /sys/kernel/debug/tracing/current_tracer


$ echo -n function > /sys/kernel/debug/tracing/current_tracer


$ echo -n function_graph  > /sys/kernel/debug/tracing/current_tracer


$ cat  /sys/kernel/debug/tracing/trace_pipe
root@wandboard-quad:~# cat /sys/kernel/debug/tracing/trace_pipe
 sh-394   [003] ...1    46.205203: mutex_unlock <- tracing_set_tracer
 sh-394   [003] ...1    46.205215: __fsnotify_parent <- 
 vfs_write
 sh-394   [003] ...1    46.205218: fsnotify <-vfs_write
 sh-394   [003] ...1    46.205220: __srcu_read_lock <- fsnotify
 sh-394   [003] ...1    46.205223: preempt_count_add <- __srcu_read_lock
 sh-394   [003] ...2    46.205226: preempt_count_sub <- __srcu_read_lock
 sh-394   [003] ...1    46.205229: __srcu_read_unlock <- fsnotify
 sh-394   [003] ...1    46.205232: __sb_end_write <- vfs_write
 sh-394   [003] ...1    46.205235: preempt_count_add <- __percpu_counter_add
 sh-394   [003] ...2    46.205238: preempt_count_sub <- __percpu_counter_add
 sh-394   [003] d..1    46.205247: gic_handle_irq <- __irq_usr
 <idle>-0     [002] d..2    46.205247: ktime_get <- cpuidle_enter_state


task-PID [cpu-nr] irqs-off need-resched hard/softirq preempt-depth delay-timestamp function

$ cat /sys/kernel/debug/tracing/trace_pipe
 3)   ==========> |
 3)               |  gic_handle_irq() {
 2)   ==========> |
 2)               |  gic_handle_irq() {
 3)   0.637 us    |    irq_find_mapping();
 2)   0.712 us    |    irq_find_mapping();
 3)               |    handle_IRQ() {
 2)               |    handle_IRQ() {
 3)               |      irq_enter() {
 2)               |      irq_enter() {
 3)   0.652 us    |        rcu_irq_enter();
 2)   0.666 us    |        rcu_irq_enter();
 3)   0.591 us    |        preempt_count_add();
 2)   0.606 us    |        preempt_count_add();


cpu-nr) timestamp | functions


$ echo 0 > /sys/kernel/debug/tracing/tracing_on


$ echo 1 > /sys/kernel/debug/tracing/tracing_on


$ cat /sys/kernel/debug/tracing/available_filter_functions


$ echo -n <function_name> >>  /sys/kernel/debug/tracing/set_ftrace_filter


$ echo -n '!<function>' >>  /sys/kernel/debug/tracing/set_ftrace_filter


$ echo >  /sys/kernel/debug/tracing/set_ftrace_filter


$ echo -n 'ipu_*:mod:ipu' > /sys/kernel/debug/tracing/set_ftrace_filter
$ echo -n 'suspend_enter:dump' > /sys/kernel/debug/tracing/set_ftrace_filter
$ echo -n 'suspend_enter:traceon' > /sys/kernel/debug/tracing/set_ftrace_filter


$ echo 1 > /proc/sys/kernel/ftrace_dump_on_oops


$ echo -n <function_name> > /sys/kernel/debug/tracing/set_ftrace_filter
$ echo -n function > /sys/kernel/debug/tracing/current_tracer
$ echo 1 > /sys/kernel/debug/tracing/options/func_stack_trace
$ cat /sys/kernel/debug/tracing/trace
$ echo 0 > /sys/kernel/debug/tracing/options/func_stack_trace
$ echo > /sys/kernel/debug/tracing/set_ftrace_filter


ftrace=function_graph ftrace_filter=mxc_hdmi*,fb_show*


#include "imx6q.dtsi"
#include "imx6qdl-wandboard.dtsi"

/ {
    model = "Wandboard i.MX6 Quad Board";
    compatible = "wand,imx6q-wandboard", "fsl,imx6q";

    memory {
        reg = <0x10000000 0x80000000>;
    };
};

node@0{
  an-empty-property;
  a-string-property = "a string";
  a-string-list-property = "first string", "second string";
  a-cell-property = <1>;
  a-cell-property = <0x1 0x2>;
  a-byte-data-property = [0x1 0x2 0x3 0x4];
  a-phandle-property = <&node1>;
}

static const struct of_device_id of_imx_thermal_match[] = {
    { .compatible = "fsl,imx6q-tempmon", },
    { /* end */ }
};
MODULE_DEVICE_TABLE(of, of_imx_thermal_match);

static struct platform_driver imx_thermal = {
    .driver = {
        .name   = "imx_thermal",
        .owner  = THIS_MODULE,
        .of_match_table = of_imx_thermal_match,
    },
    .probe      = imx_thermal_probe,
    .remove   = imx_thermal_remove,
};
module_platform_driver(imx_thermal);

/ {
    #address-cells = <1>;
    #size-cells = <1>;
    chosen { };
    aliases { };
    memory { device_type = "memory"; reg = <0 0>; };
};

#include "skeleton.dtsi"

/ {
    model = "Wandboard i.MX6 Quad Board";
    compatible = "wand,imx6q-wandboard", "fsl,imx6q";

    memory {};

    aliases {};

    intc: interrupt-controller@00a01000 {};

    soc {
        compatible = "simple-bus";

        dma_apbh: dma-apbh@00110000 {};

        timer@00a00600 {};

        L2: l2-cache@00a02000 {};

        pcie: pcie@0x01000000 {};

        aips-bus@02000000 { /* AIPS1 */
            compatible = "fsl,aips-bus", "simple-bus";

            spba-bus@02000000 {
                compatible = "fsl,spba-bus", "simple-bus";
            };

            aipstz@0207c000 {};

            clks: ccm@020c4000 {};

            iomuxc: iomuxc@020e0000 {};
        };

        aips-bus@02100000 {
            compatible = "fsl,aips-bus", "simple-bus";
        };
    };
};

soc {
    compatible = "simple-bus";
    #address-cells = <1>;
    #size-cells = <1>;
    ranges;

    aips-bus@02000000 { /* AIPS1 */
        compatible = "fsl,aips-bus", "simple-bus";
        reg = <0x02000000 0x100000>;
    }
}

reg = <0x02000000 0x100000>;


$ cd /opt/yocto/fsl-community-bsp/
$ source setup-environment wandboard-quad
$ bitbake -c devshell virtual/kernel


$ make dtbs


DTC_FLAGS="-p 1024" make dtbs

$ bitbake -c deploy -f virtual/kernel


> tftp ${fdt_addr} ${fdt_file}


> fdt addr ${fdt_addr}


> fdt list /cpus
cpus {
 #address-cells = <0x00000001>;
 #size-cells = <0x00000000>;
 cpu@0 {
 };
};
> fdt print /cpus
cpus {
 #address-cells = <0x00000001>;
 #size-cells = <0x00000000>;
 cpu@0 {
 compatible = "arm,cortex-a9";
 device_type = "cpu";
 reg = <0x00000000>;
 next-level-cache = <0x0000001d>;
 [omitted]
 };
};


> fdt mknode / new-node
> fdt list /new-node 
new-node {
};


> fdt set /new-node testprop testvalue
> fdt print /new-node 
new-node {
 testprop = "testvalue";
};
> fdt rm /new-node testprop 
> fdt print /new-node 
new-node {
};


# ls /proc/device-tree/cpus/
#address-cells  cpu@0           cpu@2           name
#size-cells     cpu@1           cpu@3


$ bitbake -e <package> | grep ^WORKDIR=


FILES_${PN} += "${bindir}/file.bin"


FILES_${PN}-dev += "${libdir}/lib.so"


$ bitbake -e core-image-minimal | grep ^IMAGE_ROOTFS=


$ yocto-layer create custom


# We have a conf and classes directory, add to BBPATH
BBPATH .= ":${LAYERDIR}"

# We have recipes-* directories, add to BBFILES
BBFILES += "${LAYERDIR}/recipes-*/*/*.bb \
        ${LAYERDIR}/recipes-*/*/*.bbappend"

BBFILE_COLLECTIONS += "custom"
BBFILE_PATTERN_custom = "^${LAYERDIR}/"
BBFILE_PRIORITY_custom = "6"

SRC_URI_append_wandboard-quad = " file://mypatch.patch"

SRC_URI_append_mx6 = " file://mypatch.patch"

conf/machine/wandboard-quad.conf:SOC_FAMILY = "mx6:mx6q:wandboard"

include conf/machine/include/soc-family.inc
MACHINEOVERRIDES =. "${@['', '${SOC_FAMILY}:']['${SOC_FAMILY}' != '']}"

${PN}-${PV}/${DISTRO}
${PN}/${DISTRO}
files/${DISTRO}

${PN}-${PV}/${MACHINE}
${PN}/${MACHINE}
files/${MACHINE}

${PN}-${PV}/${SOC_FAMILY}
${PN}/${SOC_FAMILY}
files/${SOC_FAMILY}

${PN}-${PV}/${TARGET_ARCH}
${PN}/${TARGET_ARCH}
files/${TARGET_ARCH}

${PN}-${PV}/
${PN}/
files/

${PN}-${PV}/poky
${PN}/poky
files/poky
${PN}-${PV}/wandboard-quad
${PN}/wandboard-quad
files/wandboard-quad
${PN}-${PV}/wandboard
${PN}/wandboard
files/wandboard
${PN}-${PV}/mx6q
${PN}/mx6q
files/mx6q
${PN}-${PV}/mx6
${PN}/mx6
files/mx6
${PN}-${PV}/armv7a
${PN}/armv7a
files/armv7a
${PN}-${PV}/arm
${PN}/arm
files/arm
${PN}-${PV}/
${PN}/
files/

FILESEXTRAPATHS_prepend := "${THISDIR}/folder:"

PREFERRED_PROVIDER_virtual/kernel = "linux-imx"

PREFERRED_VERSION_linux-imx_mx6 = "3.10.17"

PREFERRED_VERSION_linux-imx_mx6 = "3.10%"

DEFAULT_PREFERENCE = "-1"

$ bitbake-layers show-recipes | grep -A 1 htop
htop:
 meta-oe              1.0.3


$ bitbake -s | grep htop
htop                                                :1.0.3-r0


$ find . -type f -name "htop*.bb"
./meta-openembedded/meta-oe/recipes-support/htop/htop_1.0.3.bb


IMAGE_INSTALL_append = " htop"

IMAGE_INSTALL_append_pn-core-image-minimal = " htop"

FEATURE_PACKAGES_debug-utils = "strace perf"

EXTRA_IMAGE_FEATURES += "debug-utils"

SUMMARY = "Debug applications packagegroup"
LICENSE = "GPLv2"
LIC_FILES_CHKSUM = "file://${COREBASE}/LICENSE;md5=3f40d7994397109285ec7b81fdeb3b58"

inherit packagegroup

RDEPENDS_${PN} = "\
    strace \
    perf \
"

FEATURE_PACKAGES_debug-utils = "packagegroup-debug-utils"

SUMMARY = "A small image just capable of allowing a device to boot."

IMAGE_INSTALL = "packagegroup-core-boot ${ROOTFS_PKGMANAGE_BOOTSTRAP} ${CORE_IMAGE_EXTRA_INSTALL}"

IMAGE_LINGUAS = " "

LICENSE = "MIT"

inherit core-image

IMAGE_ROOTFS_SIZE ?= "8192"

require recipes-core/images/core-image-minimal.bb
IMAGE_FEATURES += "ssh-server-dropbear package-management"

ROOTFS_POSTPROCESS_COMMAND += "function1;...;functionN"

$ bitbake -c menuconfig busybox


$ bitbake -C compile busybox


$ bitbake -e busybox | grep ^WORKDIR=
$ scp ${WORKDIR}/deploy-rpms/cortexa9hf_vfp_neon/busybox- 1.22.1-r32.cortexa9hf_vfp_neon.rpm root@<target_ip>:/tmp


# rpm --force -U /tmp/busybox-1.22.1- r32.cortexa9hf_vfp_neon.rpm


SUMMARY = "The package description for the package management system"

LICENSE = "The package's licenses typically from meta/files/common-licenses/"
LIC_FILES_CHKSUM = "License checksum used to track open license changes"
DEPENDS = "Package list of build time dependencies"

SRC_URI = "Local or remote file or repository to fetch"
SRC_URI[md5sum] = "md5 checksums for all remote fetched files (not for repositories)"
SRC_URI[sha256sum] = "sha256 checksum for all remote fetched files (not for repositories)"

S = "Location of the source in the working directory, by default ${WORKDIR}/${PN}-${PV}."

inherit <class needed for some functionality>

# Task overrides, like do_configure, do_compile and do_install, or nothing.

# Package splitting (if needed).

# Machine selection variables (if needed).

LICENSE = "GPL-2.0 | MIT"

LICENSE = "ISC & MIT"

LICENSE_${PN} = "GPLv2"
LICENSE_${PN}-dev = "GPLv2"
LICENSE_${PN}-dbg = "GPLv2"
LICENSE_${PN}-doc = "CC-BY-2.0"

LIC_FILES_CHKSUM = "file://${COREBASE}/meta/files/common- licenses/GPL-2.0;md5=801f80980d171dd6425610833a22dbe6"
LIC_FILES_CHKSUM = "file://COPYING;md5=f7bdc0c63080175d1667091b864cb12c"
LIC_FILES_CHKSUM = "file://usr/include/head.h;endline=7;md5=861ebad4adc7236f8d1905338 abd7eb2"
LIC_FILES_CHKSUM = "file://src/file.c;beginline=5;endline=13;md5=6c7486b21a8524b1879f a159578da31e"

SRCREV = "04024dea2674861fcf13582a77b58130c67fccd8"
SRC_URI = "git://repo.com/git/ \
           file://fix.patch;name=patch \
           http://example.org/archive.data;name=archive"
SRC_URI[archive.md5sum] = "aaf32bde135cf3815aa3221726bad71e"
SRC_URI[archive.sha256sum] = "65be91591546ef6fdfec93a71979b2b108eee25edbc20c53190caafc9a92d4e7"

S = "${WORKDIR}/git"

DESCRIPTION = "Simple helloworld application"
SECTION = "examples"
LICENSE = "MIT"
LIC_FILES_CHKSUM = "file://${COMMON_LICENSE_DIR}/MIT;md5=0835ade698e0bcf8506ecda2f7b4f302"

SRC_URI = "file://helloworld.c"

S = "${WORKDIR}"

do_compile() {
             ${CC} helloworld.c -o helloworld
}

do_install() {
             install -d ${D}${bindir}
             install -m 0755 helloworld ${D}${bindir}
}

#include <stdio.h>

int main(void)
{
    return printf("Hello World");
}

PACKAGECONFIG ??= "feature"
PACKAGECONFIG[feature] = "--with-feature,--without-feature,build- deps-feature,rt-deps-feature"

PACKAGECONFIG_append = " feature1 feature2"

PACKAGECONFIG_pn-<package_name> = "feature1 feature2"
PACKAGECONFIG_append_pn-<package_name> = " feature1 feature2"

PACKAGECONFIG ??= "gnutls"
PACKAGECONFIG[gnutls] = ",,gnutls"
PACKAGECONFIG[openssl] = ",,openssl"

FILES_${PN} += "List of files to include in the main package"
FILES_${PN}-dbg += "Optional list of files to include in the debug package"
FILES_${PN}-dev += "Optional list of files to include in the development package"
FILES_${PN}-doc += "Optional list of files to include in the documentation package"

PACKAGE_ARCH = "${MACHINE_ARCH}"

COMPATIBLE_MACHINE = "(mxs|mx5|mx6)"

DESCRIPTION = "Example of data or configuration recipe"
SECTION = "examples"

LICENSE = "GPLv2"
LIC_FILES_CHKSUM = "file://${COREBASE}/meta/files/common-licenses/GPL-2.0;md5=801f80980d171dd6425610833a22dbe6"

SRCREV = "${AUTOREV}"
SRC_URI = "git://github.com/yoctocookbook/examples.git \
           file://example.data"

S = "${WORKDIR}/git"

inherit allarch

do_compile() {
}

do_install() {
        install -d ${D}${sysconfdir}
        install -d ${D}${sbindir}
        install -m 0755 ${WORKDIR}/example.data ${D}/${sysconfdir}/
        install -m 0755 ${S}/python-scripts/* ${D}/${sbindir}
}

<username>:<password>:<uid>:<gid>:<comment>:<home directory>:<login shell>

root::0:0:root:/root:/bin/sh
daemon:*:1:1:daemon:/usr/sbin:/bin/sh
bin:*:2:2:bin:/bin:/bin/sh
sys:*:3:3:sys:/dev:/bin/sh
sync:*:4:65534:sync:/bin:/bin/sync
games:*:5:60:games:/usr/games:/bin/sh
man:*:6:12:man:/var/cache/man:/bin/sh
lp:*:7:7:lp:/var/spool/lpd:/bin/sh
mail:*:8:8:mail:/var/mail:/bin/sh
news:*:9:9:news:/var/spool/news:/bin/sh
uucp:*:10:10:uucp:/var/spool/uucp:/bin/sh
proxy:*:13:13:proxy:/bin:/bin/sh
www-data:*:33:33:www-data:/var/www:/bin/sh
backup:*:34:34:backup:/var/backups:/bin/sh
list:*:38:38:Mailing List Manager:/var/list:/bin/sh
irc:*:39:39:ircd:/var/run/ircd:/bin/sh
gnats:*:41:41:Gnats Bug-Reporting System (admin):/var/lib/gnats:/bin/sh
nobody:*:65534:65534:nobody:/nonexistent:/bin/sh

USERADD_PACKAGES = "${PN}"

inherit useradd

PASSWORD ?= "miDBHFo2hJSAA"
USERADD_PACKAGES = "${PN}"
USERADD_PARAM_${PN} = "--system --create-home \
                       --groups tty \
                       --password ${PASSWORD} \
                       --user-group ${PN}"

USERADDEXTENSION = "useradd-staticids"

USERADD_ERROR_DYNAMIC = "1"

inherit extrausers

EXTRA_USERS_PARAMS = "\
  useradd -P password root; \
  "

# /etc/inittab: init(8) configuration.
# $Id: inittab,v 1.91 2002/01/25 13:35:21 miquels Exp $

# The default runlevel.
id:5:initdefault:

# Boot-time system configuration/initialization script.
# This is run first except when booting in emergency (-b) mode.
si::sysinit:/etc/init.d/rcS

# What to do in single-user mode.
~~:S:wait:/sbin/sulogin

# /etc/init.d executes the S and K scripts upon change
# of runlevel.
#
# Runlevel 0 is halt.
# Runlevel 1 is single-user.
# Runlevels 2-5 are multi-user.
# Runlevel 6 is reboot.

l0:0:wait:/etc/init.d/rc 0
l1:1:wait:/etc/init.d/rc 1
l2:2:wait:/etc/init.d/rc 2
l3:3:wait:/etc/init.d/rc 3
l4:4:wait:/etc/init.d/rc 4
l5:5:wait:/etc/init.d/rc 5
l6:6:wait:/etc/init.d/rc 6
# Normally not reached, but fallthrough in case of emergency.
z6:6:respawn:/sbin/sulogin

INITSCRIPT_PACKAGES = "${PN}-httpd ${PN}-ftpd"
INITSCRIPT_NAME_${PN}-httpd = "httpd.sh"
INITSCRIPT_NAME_${PN}-ftpd = "ftpd.sh"
INITSCRIPT_PARAMS_${PN}-httpd = "defaults"
INITSCRIPT_PARAMS_${PN}-ftpd = "start 99 5 2 . stop 20 0 1 6 ."

DESCRIPTION = "Initscripts for mounting filesystems"
LICENSE = "MIT"

LIC_FILES_CHKSUM = "file://${COMMON_LICENSE_DIR}/MIT;md5=0835ade698e0bcf8506ecda2f7b4 f302"

SRC_URI = "file://mount.sh"

INITSCRIPT_NAME = "mount.sh"
INITSCRIPT_PARAMS = "start 09 S ."

inherit update-rc.d

S = "${WORKDIR}"

do_install () {
    install -d ${D}${sysconfdir}/init.d/
    install -c -m 755 ${WORKDIR}/${INITSCRIPT_NAME} ${D}${sysconfdir}/init.d/${INITSCRIPT_NAME}
}

DISTRO_FEATURES_append = " systemd"

VIRTUAL-RUNTIME_init_manager = "systemd"

DISTRO_FEATURES_BACKFILL_CONSIDERED = "sysvinit"
VIRTUAL-RUNTIME_initscripts = ""

+CONFIG_FHANDLE=y
+CONFIG_CGROUPS=y
+CONFIG_SECCOMP=y
+CONFIG_NET=y
+CONFIG_UNIX=y
+CONFIG_INET=y
+CONFIG_AUTOFS4_FS=y
+CONFIG_TMPFS=y
+CONFIG_TMPFS_POSIX_ACL=y
+CONFIG_SCHEDSTATS=y

SYSTEMD_PACKAGES = "${PN}-syslog"
SYSTEMD_SERVICE_${PN}-syslog = "busybox-syslog.service"
SYSTEMD_AUTO_ENABLE = "disabled"

     pkg_preinst_${PN} () {
         # Shell commands
     }

 pkg_postinst_${PN} () {
     if [ x"$D" = "x" ]; then
          # Commands to execute on device
     else
          # Commands to execute on host
     fi
 }

CONFIG_KERNEL_XZ=y
CONFIG_NO_HZ=y
CONFIG_HIGH_RES_TIMERS=y
CONFIG_BLK_DEV_INITRD=y
CONFIG_CC_OPTIMIZE_FOR_SIZE=y
CONFIG_EMBEDDED=y
CONFIG_SLOB=y
CONFIG_ARCH_MXC=y
CONFIG_SOC_IMX6Q=y
CONFIG_SOC_IMX6SL=y
CONFIG_SMP=y
CONFIG_VMSPLIT_2G=y
CONFIG_AEABI=y
CONFIG_CPU_FREQ=y
CONFIG_ARM_IMX6_CPUFREQ=y
CONFIG_CPU_IDLE=y
CONFIG_VFP=y
CONFIG_NEON=y
CONFIG_DEVTMPFS=y
CONFIG_DEVTMPFS_MOUNT=y
CONFIG_PROC_DEVICETREE=y
CONFIG_SERIAL_IMX=y
CONFIG_SERIAL_IMX_CONSOLE=y
CONFIG_REGULATOR=y
CONFIG_REGULATOR_ANATOP=y
CONFIG_MMC=y
CONFIG_MMC_SDHCI=y
CONFIG_MMC_SDHCI_PLTFM=y
CONFIG_MMC_SDHCI_ESDHC_IMX=y
CONFIG_DMADEVICES=y
CONFIG_IMX_SDMA=y
CONFIG_EXT3_FS=y

$ size vmlinux */built-in.o
text    data     bss     dec     hex filename
8746205  356560  394484 9497249  90eaa1 vmlinux
117253    2418    1224  120895   1d83f block/built-in.o
243859   11158      20  255037   3e43d crypto/built-in.o
2541356  163465   34404 2739225  29cc19 drivers/built-in.o
1956       0       0    1956     7a4 firmware/built-in.o
1728762   18672   10544 1757978  1ad31a fs/built-in.o
20361   14701     100   35162    895a init/built-in.o
29628     760       8   30396    76bc ipc/built-in.o
576593   20644  285052  882289   d7671 kernel/built-in.o
106256   24847    2344  133447   20947 lib/built-in.o
291768   14901    3736  310405   4bc85 mm/built-in.o
1722683   39947   50928 1813558  1bac36 net/built-in.o
34638     848     316   35802    8bda security/built-in.o
276979   19748    1332  298059   48c4b sound/built-in.o
138       0       0     138      8a usr/built-in.o


$ nm --size-sort --print-size -r vmlinux | head
 808bde04 00040000 B __log_buf
 8060f1c0 00004f15 r kernel_config_data
 80454190 000041f0 T hidinput_connect
 80642510 00003d40 r drm_dmt_modes
 8065cbbc 00003414 R v4l2_dv_timings_presets
 800fbe44 000032c0 T __blockdev_direct_IO
 80646290 00003100 r edid_cea_modes
 80835970 00003058 t imx6q_clocks_init
 8016458c 00002e74 t ext4_fill_super
 8056a814 00002aa4 T hci_event_packet


$ dmesg | grep -A 3 "text"
 .text : 0x80008000 - 0x80a20538   (10338 kB)
 .init : 0x80a21000 - 0x80aae240   ( 565 kB)
 .data : 0x80ab0000 - 0x80b13644   ( 398 kB)
 .bss  : 0x80b13644 - 0x80b973fc   ( 528 kB)


Freeing unused kernel memory: 564K (80a21000 - 80aae000)

DESCRIPTION = "Minimal console image."

IMAGE_INSTALL= "\
        base-files \
        base-passwd \
        busybox \
        sysvinit \
        initscripts \
        ${ROOTFS_PKGMANAGE_BOOTSTRAP} \
        ${CORE_IMAGE_EXTRA_INSTALL} \
"

IMAGE_LINGUAS = " "

LICENSE = "MIT"

inherit core-image

IMAGE_ROOTFS_SIZE ?= "8192"

DISTRO = "poky-tiny"

INSANE_SKIP_glibc-locale = "installed-vs-shipped"

$ sort -r -g  -k 4,4 files-in-image.txt -o sorted-files-in-image.txt
sorted-files-in-image.txt:
-rwxr-xr-x root       root          1238640 ./lib/libc-2.19.so
-rwxr-xr-x root       root           613804 ./sbin/ldconfig
-rwxr-xr-x root       root           539860 ./bin/busybox.nosuid
-rwxr-xr-x root       root           427556 ./lib/libm-2.19.so
-rwxr-xr-x root       root           130304 ./lib/ld-2.19.so
-rwxr-xr-x root       root            88548 ./lib/libpthread-2.19.so
-rwxr-xr-x root       root            71572 ./lib/libnsl-2.19.so
-rwxr-xr-x root       root            71488 ./lib/libresolv-2.19.so
-rwsr-xr-x root       root            51944 ./bin/busybox.suid
-rwxr-xr-x root       root            42668 ./lib/libnss_files- 2.19.so
-rwxr-xr-x root       root            30536 ./lib/libnss_compat- 2.19.so
-rwxr-xr-x root       root            30244 ./lib/libcrypt-2.19.so
-rwxr-xr-x root       root            28664 ./sbin/init.sysvinit
-rwxr-xr-x root       root            26624 ./lib/librt-2.19.so


VIRTUAL-RUNTIME_dev_manager = "mdev"

INHERIT += "archiver"
ARCHIVER_MODE[src] = "original"
ARCHIVER_MODE[diff] = "1"
ARCHIVER_MODE[recipe] = "1"
COPY_LIC_MANIFEST = "1"
COPY_LIC_DIRS = "1"

COPYLEFT_LICENSE_INCLUDE = "GPL* LGPL*"
COPYLEFT_LICENSE_EXCLUDE = "CLOSED Proprietary"

COPYLEFT_RECIPE_TYPES = "target"

tmp/deploy/licenses/core-image-small-wandboard-quad-<timestamp>/package.manifest
base-files
base-passwd
busybox
busybox-syslog
busybox-udhcpc
initscripts
initscripts-functions
libc6
run-postinsts
sysvinit
sysvinit-inittab
sysvinit-pidof
update-alternatives-opkg
update-rc.d

PACKAGE NAME: base-files
PACKAGE VERSION: 3.0.14
RECIPE NAME: base-files
LICENSE: GPLv2

PACKAGE NAME: base-passwd
PACKAGE VERSION: 3.5.29
RECIPE NAME: base-passwd
LICENSE: GPLv2+

INCOMPATIBLE_LICENSE = "GPL-3.0 LGPL-3.0 AGPL-3.0"

LICENSE = "CLOSED"

LICENSE = "Proprietary"
LIC_FILES_CHKSUM = "file://EULA.txt;md5=93b784b1c11b3fffb1638498a8dde3f6"

LICENSE = "GPLv2+ & LGPLv2.1+ & LGPLv2+"
LICENSE_FLAGS = "commercial"
LIC_FILES_CHKSUM = "file://COPYING;md5=a6f89e2100d9b6cdffcea4f398e37343 \ file://gst/synaesthesia/synaescope.h;beginline=1;endline=20 ;md5=99f301df7b80490c6ff8305fcc712838 \  file://tests/check/elements/xingmux.c;beginline=1;endline=2 1;md5=4c771b8af188724855cb99cadd390068 \  file://gst/mpegstream/gstmpegparse.h;beginline=1;endline=18 ;md5=ff65467b0c53cdfa98d0684c1bc240a9"

LICENSE_FLAGS_WHITELIST = "commercial"

LICENSE_FLAGS_WHITELIST = "commercial_gst-plugins-ugly"

$ wget http://downloads.yoctoproject.org/releases/yocto/yocto- 1.7.1/toolchain/x86_64/poky-glibc-x86_64-core-image-sato- armv7a-vfp-neon-toolchain-1.7.1.sh
$ chmod a+x poky-glibc-x86_64-core-image-sato-armv7a-vfp-neon- toolchain-1.7.1.sh
$ ./poky-glibc-x86_64-core-image-sato-armv7a-vfp-neon- toolchain-1.7.1.sh


$ cd /opt/yocto/fsl-community-bsp/
$ source setup-environment wandboard-quad


$ bitbake meta-toolchain


$ cd tmp/deploy/sdk
$ ./poky-glibc-x86_64-meta-toolchain-cortexa9hf-vfp-neon- toolchain-1.7.1.sh


$ bitbake core-image-sato -c populate_sdk


$ cd tmp/deploy/sdk
$ ./poky-glibc-x86_64-core-image-sato-cortexa9hf-vfp-neon- toolchain-1.7.1.sh


IMAGE_INSTALL_append =  " glibc-staticdev"

SDKIMAGE_FEATURES_append = " staticdev-pkgs"

$ bitbake meta-toolchain-qt


$ cd tmp/deploy/sdk
$ ./poky-glibc-x86_64-meta-toolchain-qt-cortexa9hf-vfp-neon- toolchain-qt-1.7.1.sh


$ bitbake meta-ide-support


$ source tmp/environment-setup-cortexa9hf-vfp-neon-poky-linux- gnueabi


$ wget http://downloads.yoctoproject.org/releases/yocto/yocto- 1.7.1/adt-installer/adt_installer.tar.bz2


$ cd /opt/yocto/poky
$ source oe-init-build-env qemuarm
$ bitbake adt-installer


$ cd /opt/yocto
$ cp /opt/yocto/poky/qemuarm/tmp/deploy/sdk/adt_installer.tar.bz2 /opt/yocto
$ tar xvf adt_installer.tar.bz2
$ cd /opt/yocto/adt-installer


$ ./adt_installer


$ sudo add-apt-repository ppa:webupd8team/java
$ sudo apt-get update
$ sudo apt-get install oracle-java7-set-default


 $ wget http://download.eclipse.org/technology/epp/downloads/release/kepler/SR2/eclipse-standard-kepler-SR2-linux-gtk-x86_64.tar.gz


$ tar xvf eclipse-standard-kepler-SR2-linux-gtk-x86_64.tar.gz


$ nohup eclipse/eclipse &


EXTRA_IMAGE_FEATURES += "eclipse-debug"

EXTRA_IMAGE_FEATURES += "eclipse-debug"

$ cd /opt/yocto/fsl-community-bsp/
$ source setup-environment wandboard-quad
$ bitbake core-image-sato


$ bitbake -c populate_sdk core-image-sato


$ cd tmp/deploy/sdk
$ ./poky-glibc-x86_64-core-image-sato-cortexa9hf-vfp-neon- toolchain-1.7.1.sh


#include <gtk/gtk.h>

int main(int argc, char *argv[])
{
  GtkWidget *window;
  gtk_init (&argc, &argv);
  window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
  gtk_widget_show (window);
  gtk_main ();
  return 0;
}

$ source /opt/poky/1.7.1/environment-setup-cortexa9hf-vfp-neon-poky- linux-gnueabi
$ ${CC} gtk_hello_world.c -o helloworld `pkg-config --cflags --libs gtk+-2.0`


# DISPLAY=:0 helloworld


# ps w | grep tcf
735 root     11428 S    /usr/sbin/tcf-agent -d -L- -l0


/opt/poky/1.7.1/sysroots/x86_64-pokysdk-linux/usr/bin/arm- poky-linux-gnueabi/arm-poky-linux-gnueabi-gdb


$ wget http://download.qt.io/official_releases/qtcreator/3.3/3.3.0/qt -creator-opensource-linux-x86_64-3.3.0.run
$ chmod u+x qt-creator-opensource-linux-x86_64-3.3.0.run
$ ./qt-creator-opensource-linux-x86_64-3.3.0.run


$ cd /opt/yocto/fsl-community-bsp/
$ source setup-environment wandboard-quad
$ bitbake meta-toolchain-qt


$ cd tmp/deploy/sdk
$ ./poky-glibc-x86_64-meta-toolchain-qt-cortexa9hf-vfp-neon- toolchain-qt-1.7.1.sh


source /opt/poky/1.7.1/environment-setup-cortexa9hf-vfp-neon-poky- linux-gnueabi
#! /bin/sh


$ ./bin/qtcreator.sh &


/opt/poky/1.7.1/sysroots/x86_64-pokysdk-linux/usr/bin/arm- poky-linux-gnueabi/arm-poky-linux-gnueabi-g++


/opt/poky/1.7.1/sysroots/x86_64-pokysdk-linux/usr/bin/arm- poky-linux-gnueabi/arm-poky-linux-gnueabi-gdb


/opt/poky/1.7.1/sysroots/x86_64-pokysdk-linux/usr/bin/qmake


/opt/poky/1.7.1/sysroots/cortexa9hf-vfp-neon-poky-linux- gnueabi/


#include <QApplication>
#include <QPushButton>

 int main(int argc, char *argv[])
 {
     QApplication app(argc, argv);

     QPushButton hello("Hello world!");

     hello.show();
     return app.exec();
 }

$ source /opt/poky/1.7.1/environment-setup-cortexa9hf-vfp-neon-poky- linux-gnueabi
$ qmake -project
$ qmake
$ make


$ cd /opt/yocto/fsl-community-bsp/
$ source setup-environment wandboard-quad


EXTRA_IMAGE_FEATURES += "qt4-pkgs"

IMAGE_INSTALL_append = " icu"

$ bitbake core-image-sato


# DISPLAY=:0 qt_hello_world


SOURCES += \
   qt_hello_world.cpp

TARGET =  qt_hello_world
   target.files =  qt_hello_world
   target.path = /

INSTALLS += target

IMAGE_INSTALL_append =  " openssh-sftp-server"

EXTRA_IMAGE_FEATURES += "eclipse-debug"

DESCRIPTION = "Simple helloworld application"
SECTION = "examples"
LICENSE = "MIT"
LIC_FILES_CHKSUM = "file://${COMMON_LICENSE_DIR}/MIT;md5=0835ade698e0bcf8506ecda2f7b4 f302"

SRC_URI = "file://helloworld.c"

S = "${WORKDIR}"

do_compile() {
             ${CC} helloworld.c -o helloworld
}

do_install() {
             install -d ${D}${bindir}
             install -m 0755 helloworld ${D}${bindir}
}

#include <stdio.h>

int main(void)
{
   return printf("Hello World");
}

$ cd /opt/yocto/fsl-community-bsp/
$ source setup-environment wandboard-quad
$ bitbake -c cleanall helloworld


$ bitbake -c devshell helloworld


$ git init
$ git add helloworld.c
$ git commit -s -m "Original revision"


#include <stdio.h>

int main(void)
{
 return printf("Howdy World");
}


$ bitbake -C compile helloworld


$ bitbake -e helloworld | grep ^WORKDIR=
WORKDIR="/opt/yocto/fsl-community-bsp/wandboard- quad/tmp/work/cortexa9hf-vfp-neon-poky-linux- gnueabi/helloworld/1.0-r0"
$ scp ${WORKDIR_PATH}/deploy-rpms/deploy- rpms/cortexa9hf_vfp_neon/helloworld-1.0- r0.cortexa9hf_vfp_neon.rpm root@<target_ip_address>:/
$ rpm -i /helloworld-1.0-r0.cortexa9hf_vfp_neon.rpm


$ bitbake -c devshell helloworld
$ git add  helloworld.c
$ git commit -s -m "Change greeting message"


$ git format-patch -1 -o /opt/yocto/fsl-community- bsp/sources/meta-custom/recipes- example/helloworld/helloworld-1.0


SRC_URI  =  "file://helloworld.c \
           file://0001-Change-greeting-message.patch"

DESCRIPTION = "Simple helloworld application"
SECTION = "examples"
LICENSE = "MIT"
LIC_FILES_CHKSUM = "file://${COMMON_LICENSE_DIR}/MIT;md5=0835ade698e0bcf8506ecda2f7b4 f302"

SRC_URI = "git://github.com/yoctocookbook/helloworld"

S = "${WORKDIR}/git"

do_compile() {
             ${CC} helloworld.c -o helloworld
}

do_install() {
             install -d ${D}${bindir}
             install -m 0755 helloworld ${D}${bindir}
}

$ cd /opt/yocto/
$ git clone git://github.com/yoctocookbook/helloworld


$ mkdir -p /opt/yocto/helloworld
$ cd /opt/yocto/helloworld
$ git init


$ git add helloworld.c


$ git commit -s -m "Original revision"


INHERIT += "externalsrc"
EXTERNALSRC_pn-helloworld = "/opt/yocto/helloworld"
EXTERNALSRC_BUILD_pn-helloworld = "/opt/yocto/helloworld"

$ cd /opt/yocto/fsl-community-bsp/
$ source setup-environment wandboard-quad
$ bitbake helloworld


SUMMARY = "Rotates, compresses, removes and mails system log files"
SECTION = "console/utils"
HOMEPAGE = "https://fedorahosted.org/logrotate/"
LICENSE = "GPLv2"

DEPENDS="coreutils popt"

LIC_FILES_CHKSUM = "file://COPYING;md5=18810669f13b87348459e611d31ab760"

SRC_URI = "https://fedorahosted.org/releases/l/o/logrotate/logrotate- ${PV}.tar.gz \"
SRC_URI[md5sum] = "99e08503ef24c3e2e3ff74cc5f3be213"
SRC_URI[sha256sum] = "f6ba691f40e30e640efa2752c1f9499a3f9738257660994de70a45fe00d12b64"

EXTRA_OEMAKE = ""

do_install(){
    oe_runmake install DESTDIR=${D} PREFIX=${D} MANDIR=${mandir}
    mkdir -p ${D}${sysconfdir}/logrotate.d
    mkdir -p ${D}${sysconfdir}/cron.daily
    mkdir -p ${D}${localstatedir}/lib
    install -p -m 644 examples/logrotate-default ${D}${sysconfdir}/logrotate.conf
    install -p -m 755 examples/logrotate.cron ${D}${sysconfdir}/cron.daily/logrotate
    touch ${D}${localstatedir}/lib/logrotate.status
}

DESCRIPTION = "GNU helloworld autotools recipe"
SECTION = "examples"

LICENSE = "GPLv3"
LIC_FILES_CHKSUM = "file://${COREBASE}/meta/files/common- licenses/GPL-3.0;md5=c79ff39f19dfec6d293b95dea7b07891"

SRC_URI = "${GNU_MIRROR}/hello/hello-${PV}.tar.gz"
SRC_URI[md5sum] = "67607d2616a0faaf5bc94c59dca7c3cb"
SRC_URI[sha256sum] = "ecbb7a2214196c57ff9340aa71458e1559abd38f6d8d169666846935df191ea7"

inherit autotools gettext

cmake_minimum_required(VERSION 2.8.10)
project(helloworld)
add_executable(helloworld helloworld.c)
install(TARGETS helloworld RUNTIME DESTINATION bin)

DESCRIPTION = "Simple helloworld cmake application"
SECTION = "examples"
LICENSE = "MIT"
LIC_FILES_CHKSUM = "file://${COMMON_LICENSE_DIR}/MIT;md5=0835ade698e0bcf8506ecda2f7b4 f302"

SRC_URI = "file://CMakeLists.txt \
           file://helloworld.c"
S = "${WORKDIR}"

inherit cmake

EXTRA_OECMAKE = ""

import os
env = Environment(CC = os.environ['CC'],
                  ENV = {'PATH': os.environ['PATH']})
env.Program("helloworld", "helloworld.c")

DESCRIPTION = "Simple helloworld scons application"
SECTION = "examples"
LICENSE = "MIT"
LIC_FILES_CHKSUM = "file://${COMMON_LICENSE_DIR}/MIT;md5=0835ade698e0bcf8506ecda2f7b4 f302"

SRC_URI = "file://SConstruct \
           file://helloworld.c"

S = "${WORKDIR}"

inherit scons

EXTRA_OESCONS = ""

do_install() {
    install -d ${D}/${bindir}
    install -m 0755 helloworld ${D}${bindir}
}

char * hello (void)
{
  return "Hello";
}

char * world (void)
{
  return "World";
}

$ source /opt/poky/1.7.1/environment-setup-cortexa9hf-vfp- neon-poky-linux-gnueabi


${CC} -c hello.c world.c
${AR} -cvq libhelloworld.a hello.o world.o


${AR} -t libhelloworld.a


#include <stdio.h>
int main (void)
{
  return printf("%s %s\n",hello(),world());
}

${CC} -o helloworld helloworld.c libhelloworld.a


$ readelf -d helloworld
Dynamic section at offset 0x534 contains 24 entries:
 Tag        Type                         Name/Value
 0x00000001 (NEEDED)                     Shared library: [libc.so.6]


${CC} -fPIC -g -c hello.c world.c
${CC} -shared -Wl,-soname,libhelloworld.so.1 -o libhelloworld.so.1.0 hello.o world.o


${CC} helloworld.c libhelloworld.so.1.0 -o helloworld


$ readelf -d helloworld
Dynamic section at offset 0x6ec contains 25 entries:
 Tag        Type                         Name/Value
 0x00000001 (NEEDED)                     Shared library: [libhelloworld.so.1]
 0x00000001 (NEEDED)                     Shared library: [libc.so.6]


DESCRIPTION = "Simple helloworld example static library"
SECTION = "libs"
LICENSE = "MIT"
LIC_FILES_CHKSUM = "file://${COMMON_LICENSE_DIR}/MIT;md5=0835ade698e0bcf8506ecda2f7b4 f302"

SRC_URI = "file://hello.c \
           file://world.c \
           file://helloworld.pc"
S = "${WORKDIR}"

do_compile() {
        ${CC} -c hello.c world.c
        ${AR} -cvq libhelloworld.a hello.o world.o
}

do_install() {
        install -d ${D}${libdir}
        install -m 0755 libhelloworld.a ${D}${libdir}
}

meta-custom/recipes-example/libhelloworld-dyn/libhelloworlddyn_1.0.bb
DESCRIPTION = "Simple helloworld example dynamic library"
SECTION = "libs"
LICENSE = "MIT"
LIC_FILES_CHKSUM = "file://${COMMON_LICENSE_DIR}/MIT;md5=0835ade698e0bcf8506ecda2f7b4 f302"

SRC_URI = "file://hello.c \
           file://world.c \
           file://helloworld.pc"

S = "${WORKDIR}"

do_compile() {
       ${CC} -fPIC -g -c hello.c world.c
       ${CC} -shared -Wl,-soname,libhelloworld.so.1 -o libhelloworld.so.1.0 hello.o world.o
}

do_install() {
       install -d ${D}${libdir}
       install -m 0755 libhelloworld.so.1.0 ${D}${libdir}
       ln -s libhelloworld.so.1.0 ${D}/${libdir}/libhelloworld.so.1
       ln -s libhelloworld.so.1 ${D}/${libdir}/libhelloworld.so
}

DESCRIPTION = "Simple helloworld example"
SECTION = "examples"
LICENSE = "MIT"
LIC_FILES_CHKSUM = "file://${COMMON_LICENSE_DIR}/MIT;md5=0835ade698e0bcf8506ecda2f7b4 f302"

DEPENDS = "libhelloworld-static"

SRC_URI = "file://helloworld.c"

S = "${WORKDIR}"

do_compile() {
        ${CC} -o helloworld helloworld.c ${STAGING_LIBDIR}/libhelloworld.a
}

do_install() {
        install -d ${D}${bindir}
        install -m 0755 helloworld ${D}${bindir}
}

meta-custom/recipes-example/helloworld-shared/helloworldshared_1.0.bb
DESCRIPTION = "Simple helloworld example"
SECTION = "examples"
LICENSE = "MIT"
LIC_FILES_CHKSUM = "file://${COMMON_LICENSE_DIR}/MIT;md5=0835ade698e0bcf8506ecda2f7b4 f302"

DEPENDS = "libhelloworld-dyn"

SRC_URI = "file://helloworld.c"

S = "${WORKDIR}"

do_compile() {
        ${CC} -o helloworld helloworld.c -lhelloworld
}

do_install() {
        install -d ${D}${bindir}
        install -m 0755 helloworld ${D}${bindir}
}

prefix=/usr/local
exec_prefix=${prefix}
includedir=${prefix}/include
libdir=${exec_prefix}/lib

Name: helloworld
Description: The helloworld library
Version: 1.0.0
Cflags: -I${includedir}/helloworld
Libs: -L${libdir} -lhelloworld

Libs: -L${libdir} libhelloworld.a

DESCRIPTION = "Simple QT helloworld example"
SECTION = "examples"
LICENSE = "MIT"
LIC_FILES_CHKSUM = "file://${COMMON_LICENSE_DIR}/MIT;md5=0835ade698e0bcf8506ecda2f7b4 f302"

RDEPENDS_${PN} += "icu"

SRC_URI = "file://qt_hello_world.cpp \
           file://qt_hello_world.pro"

S = "${WORKDIR}"

inherit qt4e

do_install() {
         install -d ${D}${bindir}
         install -m 0755 qt_hello_world ${D}${bindir}
}

#include <QApplication>
#include <QPushButton>

 int main(int argc, char *argv[])
 {
     QApplication app(argc, argv);

     QPushButton hello("Hello world!");

     hello.show();
     return app.exec();
 }

SOURCES += \
   qt_hello_world.cpp

IMAGE_INSTALL_append = " qt-helloworld"

$ bitbake qt4e-demo-image


# qt_hello_world -qws


# export FRAMEBUFFER=/dev/fb1


# cat /dev/zero > /dev/fb0


# cat /dev/fb0 > fb.raw


# cat fb.raw > /dev/fb0


# fbset -fb /dev/fb0
mode "1920x1080-60"
 # D: 148.500 MHz, H: 67.500 kHz, V: 60.000 Hz
 geometry 1920 1080 1920 1080 24
 timings 6734 148 88 36 4 44 5
 accel false
 rgba 8/16,8/8,8/0,0/0
endmode


video=mxcfbn:dev=hdmi,<xres>x<yres>M[@rate]

video=mxcfb0:dev=hdmi,1920x1080M@60

# echo 0 > /sys/class/graphics/fb0/blank

DISTRO_FEATURES_remove = "x11 directfb wayland"

$ bitbake fsl-image-multimedia


       mxcfb1: fb@0 {
                compatible = "fsl,mxc_sdc_fb";
                disp_dev = "hdmi";
                interface_pix_fmt = "RGB24";
                mode_str ="1920x1080M@60";
                default_bpp = <24>;
                int_clk = <0>;
                late_init = <0>;
        };

# cd /home/root
# wget http://video.blendertestbuilds.de/download.blender.org/peach/trailer_ 1080p.mov
# gst-launch playbin2 uri=file:///home/root/trailer_1080p.mov


# gst-inspect | grep imx
h264.imx:  mfw_h264decoder: h264 video decoder
audiopeq.imx:  mfw_audio_pp: audio post equalizer
aiur.imx: webm: webm
aiur.imx:  aiurdemux: aiur universal demuxer
mpeg2dec.imx:  mfw_mpeg2decoder: mpeg2 video decoder
tvsrc.imx:  tvsrc: v4l2 based tv src
ipucsc.imx:  mfw_ipucsc: IPU-based video converter
mpeg4dec.imx:  mfw_mpeg4aspdecoder: mpeg4 video decoder
vpu.imx:  vpudec: VPU-based video decoder
vpu.imx:  vpuenc: VPU-based video encoder
mp3enc.imx:  mfw_mp3encoder: mp3 audio encoder
beep.imx: ac3: ac3
beep.imx: 3ca: ac3
beep.imx:  beepdec: beep audio decoder
beep.imx:  beepdec.vorbis: Vorbis decoder
beep.imx:  beepdec.mp3: MP3 decoder
beep.imx:  beepdec.aac: AAC LC decoder
isink.imx:  mfw_isink: IPU-based video sink
v4lsink.imx:  mfw_v4lsink: v4l2 video sink
v4lsrc.imx:  mfw_v4lsrc: v4l2 based camera src
amrdec.imx:  mfw_amrdecoder: amr audio decoder


Section "Device"
    Identifier  "i.MX Accelerated Framebuffer Device"
    Driver      "vivante"
    Option      "fbdev"     "/dev/fb0"
    Option      "vivante_fbdev" "/dev/fb0"
    Option      "HWcursor"  "false"
EndSection

#include <gtk/gtk.h>

int main(int argc, char *argv[])
{
    GtkWidget *window;
    gtk_init (&argc, &argv);
    window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
    gtk_widget_show (window);
    gtk_main ();
    return 0;
}

DESCRIPTION = "Simple GTK helloworld application"
SECTION = "examples"
LICENSE = "MIT"
LIC_FILES_CHKSUM = "file://${COMMON_LICENSE_DIR}/MIT;md5=0835ade698e0bcf8506ecda2f7b4 f302"

SRC_URI = "file://gtk_hello_world.c"

S = "${WORKDIR}"

DEPENDS = "gtk+"

inherit pkgconfig

do_compile() {
    ${CC} gtk_hello_world.c -o helloworld `pkg-config --cflags -- libs gtk+-2.0`
}

do_install() {
    install -d ${D}${bindir}
    install -m 0755 helloworld ${D}${bindir}
}

IMAGE_INSTALL_append = " gtk-helloworld"

# export DISPLAY=:0
# helloworld


DESCRIPTION = "Simple QT over X11 helloworld example"
SECTION = "examples"
LICENSE = "MIT"
LIC_FILES_CHKSUM = "file://${COMMON_LICENSE_DIR}/MIT;md5=0835ade698e0bcf8506ecda2f7b4 f302"

RDEPENDS_${PN} += "icu"

SRC_URI = "file://qt_hello_world.cpp \
           file://qt_hello_world.pro"

S = "${WORKDIR}"

inherit qt4x11

do_install() {
         install -d ${D}${bindir}
         install -m 0755 qt_hello_world ${D}${bindir}
}

EXTRA_IMAGE_FEATURES += "qt4-pkgs"
IMAGE_INSTALL_append = " qtx11-helloworld"

$ bitbake core-image-sato


# export DISPLAY=:0
# qt_hello_world


DESCRIPTION = "Simple GTK3 helloworld application"
SECTION = "examples"
LICENSE = "MIT"
LIC_FILES_CHKSUM = "file://${COMMON_LICENSE_DIR}/MIT;md5=0835ade698e0bcf8506ecda2f7b4 f302"

SRC_URI = "file://gtk_hello_world.c"

S = "${WORKDIR}"

DEPENDS = "gtk+3"

inherit pkgconfig

do_compile() {
    ${CC} gtk_hello_world.c -o helloworld `pkg-config --cflags -- libs gtk+-3.0`
}

do_install() {
    install -d ${D}${bindir}
    install -m 0755 helloworld ${D}${bindir}
}

DISTRO_FEATURES_remove = "x11"

IMAGE_INSTALL_append = " gtk3-helloworld"

$ cd /opt/yocto/fsl-community-bsp/
$ source setup-environment wandboard-quad
$ bitbake core-image-weston


# export XDG_RUNTIME_DIR=/var/run/user/root
# helloworld


SUMMARY = "PyUSB provides USB access on the Python language"
HOMEPAGE = "http://pyusb.sourceforge.net/"
SECTION = "devel/python"
LICENSE = "BSD"
LIC_FILES_CHKSUM = "file://LICENSE;md5=a53a9c39efcfb812e2464af14afab013"
DEPENDS = "libusb1"
PR = "r1"

SRC_URI = "\
    ${SOURCEFORGE_MIRROR}/pyusb/${SRCNAME}-${PV}.tar.gz \
"
SRC_URI[md5sum] = "9136b3dc019272c62a5b6d4eb624f89f"
SRC_URI[sha256sum] = "dacbf7d568c0bb09a974d56da66d165351f1ba3c4d5169ab5b734266623e1736"

SRCNAME = "pyusb"
S = "${WORKDIR}/${SRCNAME}-${PV}"

inherit distutils

DESCRIPTION = "Simple Python setuptools hello world application"
SECTION = "examples"
LICENSE = "MIT"
LIC_FILES_CHKSUM = "file://${COMMON_LICENSE_DIR}/MIT;md5=0835ade698e0bcf8506ecda2f7b4 f302"

SRC_URI = "file://setup.py \
      file://python-helloworld.py \
      file://helloworld/__init__.py \
              file://helloworld/main.py"

S = "${WORKDIR}"

inherit setuptools

do_install_append () {
    install -d ${D}${bindir}
    install -m 0755 python-helloworld.py ${D}${bindir}
}

$ mkdir -p meta-custom/recipes-python/python-helloworld/python- helloworld-1.0/helloworld/
$ touch meta-custom/recipes-python/python-helloworld/python- helloworld-1.0/helloworld/__init__.py


import sys
from setuptools import setup

setup(
    name = "helloworld",
    version = "0.1",
    packages=["helloworld"],
    author="Alex Gonzalez",
    author_email = "alex@example.com",
    description = "Hello World packaging example",
    license = "MIT",
    keywords= "example",
    url = "",
)

import sys

def main(argv=None):
    if argv is None:
        argv = sys.argv
    print "Hello world!"
    return 0

#!/usr/bin/env python
import sys
import helloworld.main

if __name__ == '__main__':
       sys.exit(helloworld.main.main())

IMAGE_INSTALL_append = " python-helloworld"

$ cd /opt/yocto/fsl-community-bsp/
$ source setup-environment wandboard-quad
$ bitbake core-image-minimal


# /usr/bin/python-helloworld.py
Hello world!


IMAGE_INSTALL_append  = " python-pip python-distribute"

$ cd /opt/yocto/fsl-community-bsp/
$ source setup-environment wandboard-quad
$ bitbake core-image-minimal


# pip search <package_name>
# pip install <package_name>


$ cd /opt/yocto/fsl-community-bsp/sources
$ git clone git://git.yoctoproject.org/meta-oracle-java


LICENSE_FLAGS_WHITELIST += "oracle_java"

SUMMARY = "Oracle Java SE runtime environment binaries"

JDK_JRE = "ejre"
require recipes-devtools/oracle-java/oracle-jse.inc

PV_UPDATE = "75"
BUILD_NUMBER = "13"

LIC_FILES_CHKSUM = "\
       file://${WORKDIR}/${JDK_JRE}${PV}_${PV_UPDATE}/COPYRIGHT;md5=0b204 bd2921accd6ef4a02f9c0001823 \
       file://${WORKDIR}/${JDK_JRE}${PV}_${PV_UPDATE}/THIRDPARTYLICENSERE ADME.txt;md5=f3a388961d24b8b72d412a079a878cdb \
       "

SRC_URI = "http://download.oracle.com/otn/java/ejre/7u${PV_UPDATE}- b${BUILD_NUMBER}/ejre-7u${PV_UPDATE}-fcs-b${BUILD_NUMBER}-linux- arm-vfp-hflt-client_headless-18_dec_2014.tar.gz"
SRC_URI[md5sum] = "759ca6735d77778a573465b1e84b16ec"
SRC_URI[sha256sum] = "ebb6499c62fc12e1471cff7431fec5407ace59477abd0f48347bf6e89c6bff3b"

RPROVIDES_${PN} += "java2-runtime"

$ bitbake oracle-jse-ejre-arm-vfp-hflt-client-headless


IMAGE_INSTALL_append = " oracle-jse-ejre-arm-vfp-hflt-client- headless"

$ cd /opt/yocto/fsl-community-bsp/
$ source setup-environment wandboard-quad
$ bitbake core-image-minimal


# /usr/bin/java -version
java version "1.7.0_75"
Java(TM) SE Embedded Runtime Environment (build 1.7.0_75-b13, headless)
Java HotSpot(TM) Embedded Client VM (build 24.75-b04, mixed mode)


SUMMARY = "Oracle Java SE runtime environment binaries"

JDK_JRE = "ejre"
require recipes-devtools/oracle-java/oracle-jse.inc

PV_UPDATE = "75"
BUILD_NUMBER = "13"

LIC_FILES_CHKSUM = "\
       file://${WORKDIR}/${JDK_JRE}${PV}_${PV_UPDATE}/COPYRIGHT;md5=0b204 bd2921accd6ef4a02f9c0001823 \
       file://${WORKDIR}/${JDK_JRE}${PV}_${PV_UPDATE}/THIRDPARTYLICENSERE ADME.txt;md5=f3a388961d24b8b72d412a079a878cdb \
       "

SRC_URI = "http://download.oracle.com/otn/java/ejre/7u${PV_UPDATE}- b${BUILD_NUMBER}/ejre-7u${PV_UPDATE}-fcs-b${BUILD_NUMBER}-linux- arm-vfp-hflt-client_headful-18_dec_2014.tar.gz"

SRC_URI[md5sum] = "84dba4ffb47285b18e6382de2991edfc"
SRC_URI[sha256sum] = "5738ffb8ce2582b6d7b39a3cbe16137d205961224899f8380eebe3922bae5c61"

RPROVIDES_${PN} += "java2-runtime"

IMAGE_INSTALL_append =  " oracle-jse-ejre-arm-vfp-hflt-client- headful"

$ cd cd /opt/yocto/fsl-community-bsp/
$ source setup-environment wandboard-quad
$ bitbake core-image-sato


# /usr/bin/java -version
java version "1.7.0_75"
Java(TM) SE Embedded Runtime Environment (build 1.7.0_75-b13)
Java HotSpot(TM) Embedded Client VM (build 24.75-b04, mixed mode)


$ cd /opt/yocto/fsl-community-bsp/sources/
$ git clone http://git.yoctoproject.org/cgit/cgit.cgi/meta-java/


+ ${BSPDIR}/sources/meta-java \
 "

PREFERRED_PROVIDER_virtual/java-initial = "cacao-initial"
PREFERRED_PROVIDER_virtual/java-native = "jamvm-native"
PREFERRED_PROVIDER_virtual/javac-native = "ecj-bootstrap-native"
PREFERRED_VERSION_openjdk-7-jre = "25b30-2.3.12"
PREFERRED_VERSION_icedtea7-native = "2.1.3"

IMAGE_INSTALL_append = " openjdk-7-jre"

$ cd /opt/yocto/fsl-community-bsp/
$ source setup-environment wandboard-quad
$ bitbake core-image-sato


# java -version
java version "1.7.0_25"
OpenJDK Runtime Environment (IcedTea 2.3.12) (25b30-2.3.12)
OpenJDK Zero VM (build 23.7-b01, mixed mode)


class HelloWorld {
  public static void main(String[] args) {
    System.out.println("Hello World!");
  }
}

$ sudo apt-get install openjdk-7-jdk


$ javac HelloWorld.java


# java HelloWorld


import javax.swing.JFrame;
import javax.swing.JLabel;

public class HelloWorldSwing {
    private static void createAndShowGUI() {
        JFrame frame = new JFrame("Hello World!");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        JLabel label = new JLabel("Hello World!");
        frame.getContentPane().add(label);

        frame.pack();
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        javax.swing.SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                createAndShowGUI();
            }
        });
    }
}

DESCRIPTION = "Simple Java Swing hello world application"
SECTION = "examples"
LICENSE = "MIT"
LIC_FILES_CHKSUM = "file://${COMMON_LICENSE_DIR}/MIT;md5=0835ade698e0bcf8506ecda2f7b4 f302"

RDEPENDS_${PN} = "java2-runtime"

SRC_URI = "file://HelloWorldSwing.java"

S = "${WORKDIR}"

inherit java-library

do_compile() {
        mkdir -p build
        javac -d build `find . -name "*.java"`
        fastjar cf ${JARFILENAME} -C build .
}

BBCLASSEXTEND = "native"

IMAGE_INSTALL_append = " libjava-helloworld-java"

IMAGE_INSTALL_append = " openjdk-7-jre openjdk-7-common"

IMAGE_INSTALL_append = " oracle-jse-ejre-arm-vfp-hflt-client- headful"

$ cd /opt/yocto/fsl-community-bsp/
$ source setup-environment wandboard-quad
$ bitbake core-image-sato


# export DISPLAY=:0
# java -cp /usr/share/java/java-helloworld.jar HelloWorldSwing


Exception in thread "main" java.awt.AWTError: Toolkit not found: sun.awt.X11.XToolkit
        at java.awt.Toolkit$2.run(Toolkit.java:875)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.awt.Toolkit.getDefaultToolkit(Toolkit.java:860)
        at java.awt.Toolkit.getEventQueue(Toolkit.java:1730)
        at java.awt.EventQueue.invokeLater(EventQueue.java:1217)
        at javax.swing.SwingUtilities.invokeLater(SwingUtilities.java:1287)
        at HelloWorldSwing.main(HelloWorldSwing.java:17)

# export DISPLAY=:0
# /usr/bin/java -cp /usr/share/java/java-helloworld.jar HelloWorldSwing


PACKAGE_CLASSES = "package_ipk"

EXTRA_IMAGE_FEATURES += "dbg-pkgs"

$ ulimit -c unlimited


$ ulimit -a
-f: file size (blocks)             unlimited
-t: cpu time (seconds)             unlimited
-d: data seg size (kb)             unlimited
-s: stack size (kb)                8192
-c: core file size (blocks)        unlimited
-m: resident set size (kb)         unlimited
-l: locked memory (kb)             64
-p: processes                      5489
-n: file descriptors               1024
-v: address space (kb)             unlimited
-w: locks                          unlimited
-e: scheduling priority            0
-r: real-time priority             0


# wvdial
--> WvDial: Internet dialer version 1.61
--> Initializing modem.
--> Sending: ATZ
ATZ
OK
--> Sending: ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
OK
--> Sending: AT+CGDCONT=1,"IP","internet"
AT+CGDCONT=1,"IP","internet"
OK
--> Modem initialized.
--> Idle Seconds = 3000, disabling automatic reconnect.
Segmentation fault (core dumped)


 $ ulimit -c unlimited
 $ sleep 30 &
 $ kill -QUIT <sleep-pid>


$ cd /opt/poky/1.7.1/
$ source environment-setup-cortexa9hf-vfp-neon-poky-linux- gnueabi


$ arm-poky-linux-gnueabi-gdb /opt/yocto/fsl-community- bsp/wandboard-quad/tmp/work/cortexa9hf-vfp-neon-poky-linux- gnueabi/wvdial/1.61-r0/packages-split/wvdial- dbg/usr/bin/.debug/wvdial core
GNU gdb (GDB) 7.7.1
Copyright (C) 2014 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "--host=x86_64-pokysdk-linux -- target=arm-poky-linux-gnueabi".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from /opt/yocto/fsl-community-bsp/wandboard- quad/tmp/work/cortexa9hf-vfp-neon-poky-linux- gnueabi/wvdial/1.61-r0/packages-split/wvdial- dbg/usr/bin/.debug/wvdial...done.
[New LWP 1050]

warning: Could not load shared library symbols for 14 libraries, e.g. /usr/lib/libwvstreams.so.4.6.
Use the "info sharedlibrary" command to see the complete listing.
Do you need "set solib-search-path" or "set sysroot"?
Core was generated by `wvdial'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x76d524c4 in ?? ()

(gdb) set sysroot /opt/poky/1.7.1/sysroots/cortexa9hf-vfp- neon-poky-linux-gnueabi/
Reading symbols from /opt/poky/1.7.1/sysroots/cortexa9hf-vfp- neon-poky-linux-gnueabi/usr/lib/libwvstreams.so.4.6...Reading symbols from /opt/poky/1.7.1/sysroots/cortexa9hf-vfp-neon-poky-linux- gnueabi/usr/lib/.debug/libwvstreams.so.4.6...done.
done.
Loaded symbols for /opt/poky/1.7.1/sysroots/cortexa9hf-vfp- neon-poky-linux-gnueabi/usr/lib/libwvstreams.so.4.6
Reading symbols from /opt/poky/1.7.1/sysroots/cortexa9hf-vfp- neon-poky-linux-gnueabi/usr/lib/libwvutils.so.4.6...Reading symbols from /opt/poky/1.7.1/sysroots/cortexa9hf-vfp-neon- poky-linux-gnueabi/usr/lib/.debug/libwvutils.so.4.6...done.
done.
[...]
Loaded symbols for /opt/poky/1.7.1/sysroots/cortexa9hf-vfp- neon-poky-linux-gnueabi/lib/libdl.so.2

(gdb) bt
#0  0x76d524c4 in WvTaskMan::_stackmaster () at utils/wvtask.cc:416
#1  0x00000000 in ?? ()

EXTRA_IMAGE_FEATURES += "tools-sdk dbg-pkgs tools-debug"

$ cd /opt/yocto/fsl-community-bsp/
$ source setup-environment wandboard-quad
$ bitbake core-image-minimal-dev


$ gdb wvdial


(gdb) run
Starting program: /usr/bin/wvdial
Cannot access memory at address 0x0
Cannot access memory at address 0x0

Program received signal SIGILL, Illegal instruction.
0x7698afe8 in ?? () from /lib/libcrypto.so.1.0.0
(gdb) sharedlibrary libcrypto
Symbols already loaded for /lib/libcrypto.so.1.0.0

(gdb) bt
#0  0x7698afe8 in ?? () from /lib/libcrypto.so.1.0.0
#1  0x769878e8 in OPENSSL_cpuid_setup () from /lib/libcrypto.so.1.0.0
#2  0x76fe715c in ?? () from /lib/ld-linux-armhf.so.3
Cannot access memory at address 0x48535540

(gdb) c
Continuing.
--> WvDial: Internet dialer version 1.61
--> Initializing modem.
--> Sending: ATZ
ATZ
OK
--> Sending: ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
OK
--> Sending: AT+CGDCONT=1,"IP","internet"
AT+CGDCONT=1,"IP","internet"
OK
--> Modem initialized.
--> Idle Seconds = 3000, disabling automatic reconnect.

Program received signal SIGSEGV, Segmentation fault.
0x76db74c4 in WvTaskMan::_stackmaster() () from /usr/lib/libwvbase.so.4.6

DEBUG_BUILD = "1"

EXTRA_IMAGE_FEATURES += "tools-debug"

EXTRA_IMAGE_FEATURES += "dbg-pkgs"

$ bitbake -c populate_sdk core-image-minimal


# gdbserver localhost:1234 /usr/bin/wvdial
Process wvdial created; pid = 879
Listening on port 1234


$ cd /opt/poky/1.7.1/
$ source environment-setup-cortexa9hf-vfp-neon-poky-linux- gnueabi


$ arm-poky-linux-gnueabi-gdb /opt/poky/1.7.1/sysroots/cortexa9hf-vfp-neon-poky-linux- gnueabi/usr/bin/.debug/wvdial
Reading symbols from /opt/poky/1.7.1/sysroots/cortexa9hf-vfp- neon-poky-linux-gnueabi/usr/bin/.debug/wvdial...done.
(gdb)


(gdb) set auto-load safe-path /

(gdb) handle SIGILL nostop

(gdb) target remote <target_ip>:1234
Remote debugging using 192.168.128.6:1234
Cannot access memory at address 0x0
0x76fd7b00 in ?? ()

(gdb) set sysroot /opt/poky/1.7.1/sysroots/cortexa9hf-vfp- neon-poky-linux-gnueabi
Reading symbols from /opt/poky/1.7.1/sysroots/cortexa9hf- vfp-neon-poky-linux-gnueabi/lib/ld-linux- armhf.so.3...done.
Loaded symbols for /opt/poky/1.7.1/sysroots/cortexa9hf-vfp- neon-poky-linux-gnueabi/lib/ld-linux-armhf.so.3

--> WvDial: Internet dialer version 1.61
--> Initializing modem.
--> Sending: ATZ
ATZ
OK
--> Sending: ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
OK
--> Sending: AT+CGDCONT=1,"IP","internet"
AT+CGDCONT=1,"IP","internet"
OK
--> Modem initialized.
--> Idle Seconds = 3000, disabling automatic reconnect.


Program received signal SIGILL, Illegal instruction.

Program received signal SIGSEGV, Segmentation fault.
0x76dc14c4 in WvTaskMan::_stackmaster () at utils/wvtask.cc:416
416     utils/wvtask.cc: No such file or directory.

(gdb) bt
#0  0x76dc14c4 in WvTaskMan::_stackmaster () at utils/wvtask.cc:416
#1  0x00000000 in ?? ()

DEBUG_BUILD = "1"

DEBUG_OPTIMIZATION = "-O -fno-omit-frame-pointer ${DEBUG_FLAGS} - pipe"

(gdb) target remote <target_ip>:1234
Remote debugging using 192.168.128.6:1234
warning: Unable to find dynamic linker breakpoint function.
GDB will be unable to debug shared library initializers
and track explicitly loaded dynamic code.
Cannot access memory at address 0x0
0x76fdd800 in ?? ()

(gdb) set sysroot /opt/poky/1.7.1/sysroots/cortexa9hf-vfp- neon-poky-linux-gnueabi
Reading symbols from /opt/poky/1.7.1/sysroots/cortexa9hf- vfp-neon-poky-linux-gnueabi/lib/ld-linux- armhf.so.3...done.
Loaded symbols for /opt/poky/1.7.1/sysroots/cortexa9hf-vfp- neon-poky-linux-gnueabi/lib/ld-linux-armhf.so.3

(gdb) c
Continuing.

Program received signal SIGILL, Illegal instruction.

Program received signal SIGABRT, Aborted.
0x76b28bb4 in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:55
55      ../sysdeps/unix/sysv/linux/raise.c: No such file or directory.
(gdb) bt
#0  0x76b28bb4 in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:55
#1  0x76b2cabc in __GI_abort () at abort.c:89
#2  0x76decfa8 in __assert_fail (__assertion=0x76df4600 "magic_number == -0x123678",
    __file=0x1 <error: Cannot access memory at address 0x1>, __line=427,
    __function=0x76df4584 <WvTaskMan::_stackmaster()::__PRETTY_FUNCTION__> "static void WvTaskMan::_stackmaster()")
    at utils/wvcrashbase.cc:98
#3  0x76dc58c8 in WvTaskMan::_stackmaster () at utils/wvtask.cc:427
Cannot access memory at address 0x123678
#4  0x00033690 in ?? ()
Cannot access memory at address 0x123678
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

IMAGE_INSTALL_append = " strace"

EXTRA_IMAGE_FEATURES += "tools-debug"

IMAGE_INSTALL_append = " procps"

# strace -f -t -e sendto /bin/bash -c "ping -c 1 127.0.0.1"
5240  17:18:04 sendto(0, "\10\0;\220x\24\0\0\225m\256\355\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\ 0\0"..., 64, 0, {sa_family=AF_INET, sin_port=htons(0), sin_addr=inet_addr("127.0.0.1")}, 28) = 64


strace -f -e <filter> -t -s<num> -o <log file>.strace <program>


$ strace -p $( pgrep <program> )


$ strace $( pgrep <program> | sed 's/^/-p' )


> setenv mmcargs 'setenv bootargs console=${console},${baudrate} root=${mmcroot} ${extra_bootargs}; run videoargs'
> setenv extra_bootargs maxcpus=1


#include <linux/perf_event.h>
#include <linux/hw_breakpoint.h>

int perf_event_open(struct perf_event_attr *attr,
                    pid_t pid, int cpu, int group_fd,
                    unsigned long flags);

#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <sys/ioctl.h>
#include <linux/perf_event.h>
#include <asm/unistd.h>

static long
perf_event_open(struct perf_event_attr *hw_event, pid_t pid,
                int cpu, int group_fd, unsigned long flags)
{
    int ret;

    ret = syscall(__NR_perf_event_open, hw_event, pid, cpu,
                   group_fd, flags);
    return ret;
}

int
main(int argc, char **argv)
{
    struct perf_event_attr pe;
    long long count;
    int fd;

    memset(&pe, 0, sizeof(struct perf_event_attr));
    pe.type = PERF_TYPE_HARDWARE;
    pe.size = sizeof(struct perf_event_attr);
    pe.config = PERF_COUNT_HW_INSTRUCTIONS;
    pe.disabled = 1;

    fd = perf_event_open(&pe, 0, -1, -1, 0);
    if (fd == -1) {
       fprintf(stderr, "Error opening leader %llx\n", pe.config);
       exit(EXIT_FAILURE);
    }

    ioctl(fd, PERF_EVENT_IOC_RESET, 0);
    ioctl(fd, PERF_EVENT_IOC_ENABLE, 0);

    printf("Measuring instruction count for this printf\n");

    ioctl(fd, PERF_EVENT_IOC_DISABLE, 0);
    read(fd, &count, sizeof(long long));

    printf("Used %lld instructions\n", count);

    close(fd);

    return 0;
}

$ source /opt/poky/1.7.1/environment-setup-cortexa9hf-vfp-neon-poky- linux-gnueabi
$ ${CC} perf_example.c -o perf_example


# ./perf_example
Measuring instruction count for this printf
Used 0 instructions


# ./perf_example
Measuring instruction count for this printf
Used 3977 instructions


# ls /sys/kernel/debug/tracing/events/
asoc          ftrace        migrate       rcu           spi
block         gpio          module        regmap        sunrpc
cfg80211      header_event  napi          regulator     task
compaction    header_page   net           rpm           timer
drm           irq           oom           sched         udp
enable        jbd           power         scsi          vmscan
ext3          jbd2          printk        signal        workqueue
ext4          kmem          random        skb           writeback
filemap       mac80211      raw_syscalls  sock


#  grep 'net'  /sys/kernel/debug/tracing/available_events 
net:netif_rx
net:netif_receive_skb
net:net_dev_queue
net:net_dev_xmit


#cat /sys/kernel/debug/tracing/events/net/netif_receive_skb/format
name: netif_receive_skb
ID: 378
format:
 field:unsigned short common_type;  offset:0;  size:2; signed:0;
 field:unsigned char common_flags;  offset:2;  size:1; signed:0;
 field:unsigned char common_preempt_count;  offset:3; size:1;  signed:0;
 field:int common_pid;  offset:4;  size:4;  signed:1;

 field:void * skbaddr;  offset:8;  size:4;  signed:0;
 field:unsigned int len;	offset:12;  size:4;  signed:0;
 field:__data_loc char[] name;	offset:16;  size:4;  signed:0;

print fmt: "dev=%s skbaddr=%p len=%u", __get_str(name), REC- >skbaddr, REC->len


# echo 1 > /sys/kernel/debug/tracing/events/net/netif_receive_skb/enable


# echo 1 > /sys/kernel/debug/tracing/events/net/enable


# echo netif_receive_skb >> /sys/kernel/debug/tracing/set_event


# echo '!netif_receive_skb' >> /sys/kernel/debug/tracing/set_event


# echo 'net:*' > /sys/kernel/debug/tracing/set_event


# echo > /sys/kernel/debug/tracing/set_event


# echo 1 > /sys/kernel/debug/tracing/tracing_on


# cd /sys/kernel/debug/tracing
# echo 1 > events/net/netif_receive_skb/enable
# echo netif_receive_skb > set_ftrace_filter
# echo function > current_tracer
# cat trace
 <idle>-0     [000] ..s2  1858.542206: netif_receive_skb <-napi_gro_receive
 <idle>-0     [000] ..s2  1858.542214: netif_receive_skb: dev=eth0 skbaddr=dcb5bd80 len=168


#include <linux/module.h>
#include "linux/timer.h"
#define CREATE_TRACE_POINTS
#include "trace.h"

static struct timer_list hello_timer;

void hello_timer_callback(unsigned long data)
{
        char a[] = "Hello";
        char b[] = "World";
        printk("%s %s\n",a,b);
      /* Insert the static tracepoint */
 trace_log_dbg(a, b);
      /* Trigger the timer again in 8 seconds */
        mod_timer(&hello_timer, jiffies + msecs_to_jiffies(8000));
}

static int hello_world_init(void)
{
      /* Setup a timer to fire in 2 seconds */
        setup_timer(&hello_timer, hello_timer_callback, 0);
        mod_timer(&hello_timer, jiffies + msecs_to_jiffies(2000));
        return 0;
}

static void hello_world_exit(void)
{
      /* Delete the timer */
        del_timer(&hello_timer);
}

module_init(hello_world_init);
module_exit(hello_world_exit);

MODULE_LICENSE("GPL v2");

#undef TRACE_SYSTEM
#define TRACE_SYSTEM log_dbg

#if !defined(_HELLOWORLD_TRACE) || defined(TRACE_HEADER_MULTI_READ)
#define _HELLOWORLD_TRACE

#include <linux/tracepoint.h>

TRACE_EVENT(log_dbg,
            TP_PROTO(char *a, char *b),
            TP_ARGS(a, b),
            TP_STRUCT__entry(
                    __string(a, a)
                    __string(b, b)),
            TP_fast_assign(
                    __assign_str(a, a);
                    __assign_str(b, b);),
            TP_printk("log_dbg: a %s b %s",
                      __get_str(a), __get_str(b))
        );
#endif

/* This part must be outside protection */
#undef TRACE_INCLUDE_PATH
#undef TRACE_INCLUDE_FILE
#define TRACE_INCLUDE_PATH .
#define TRACE_INCLUDE_FILE trace
#include <trace/define_trace.h>

obj-m   := hello_world.o
CFLAGS_hello_world.o    += -I$(src)

SRC := $(shell pwd)

all:
        $(MAKE) -C "$(KERNEL_SRC)" M="$(SRC)"

modules_install:
        $(MAKE) -C "$(KERNEL_SRC)" M="$(SRC)" modules_install

clean:
        rm -f *.o *~ core .depend .*.cmd *.ko *.mod.c
        rm -f Module.markers Module.symvers modules.order
        rm -rf .tmp_versions Modules.symvers

$ cd /opt/yocto/fsl-community-bsp/sources/meta-bsp-custom/recipes- kernel/hello-world-tracepoint/files/
$ source /opt/poky/1.7.1/environment-setup-cortexa9hf-vfp-neon-poky- linux-gnueabi
$ KERNEL_SRC=/opt/yocto/linux-wandboard make


# insmod hello_world.ko
Hello World


# cat /sys/kernel/debug/tracing/events/log_dbg/log_dbg/format
name: log_dbg
ID: 622
format:
 field:unsigned short common_type;       offset:0;       size:2; signed:0;
 field:unsigned char common_flags;       offset:2;       size:1; signed:0;
 field:unsigned char common_preempt_count;       offset:3;    size:1; signed:0;
 field:int common_pid;   offset:4;       size:4; signed:1;

 field:__data_loc char[] a;      offset:8;       size:4; signed:0;
 field:__data_loc char[] b;      offset:12;      size:4; signed:0;

print fmt: "log_dbg: a %s b %s", __get_str(a), __get_str(b)


# cd /sys/kernel/debug/tracing
# echo 1 > events/log_dbg/log_dbg/enable
# echo 1 > /sys/kernel/debug/tracing/tracing_on
# cat trace
 <idle>-0     [000] ..s2    57.425040: log_dbg: log_dbg: a Hello b World


# echo "a == \"Hello\"" > /sys/kernel/debug/tracing/events/log_dbg/log_dbg/filter


arm-poky-linux-gnueabi-objdump -d -l vmlinux | grep do_sys_open
8010bfa8 <do_sys_open>:
do_sys_open():
8010c034:       0a000036        beq     8010c114 <do_sys_open+0x16c>
8010c044:       1a000031        bne     8010c110 <do_sys_open+0x168>

#include <linux/kprobes.h>
int register_kprobe(struct kprobe *kp);
int register_jprobe(struct jprobe *jp)
int register_kretprobe(struct kretprobe *rp);

void unregister_kprobe(struct kprobe *kp);
void unregister_jprobe(struct jprobe *jp);
void unregister_kretprobe(struct kretprobe *rp);

int disable_kprobe(struct kprobe *kp);
int disable_kretprobe(struct kretprobe *rp);
int disable_jprobe(struct jprobe *jp);

int enable_kprobe(struct kprobe *kp);
int enable_kretprobe(struct kretprobe *rp);
int enable_jprobe(struct jprobe *jp);

$ cat /sys/kernel/debug/kprobes/list

$ echo 0/1 > /sys/kernel/debug/kprobes/enabled

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/kprobes.h>

static struct kprobe kp = {
  .symbol_name  = "do_sys_open",
};

static int handler_pre(struct kprobe *p, struct pt_regs *regs)
{
  pr_info("pre_handler: p->addr = 0x%p, lr = 0x%lx,"
    " sp = 0x%lx\n",
  p->addr, regs->ARM_lr, regs->ARM_sp);

  /* A dump_stack() here will give a stack backtrace */
  return 0;
}

static void handler_post(struct kprobe *p, struct pt_regs *regs,
      unsigned long flags)
{
  pr_info("post_handler: p->addr = 0x%p, status = 0x%lx\n",
    p->addr, regs->ARM_cpsr);
}

static int handler_fault(struct kprobe *p, struct pt_regs *regs, int trapnr)
{
  pr_info("fault_handler: p->addr = 0x%p, trap #%dn",
    p->addr, trapnr);
  /* Return 0 because we don't handle the fault. */
  return 0;
}

static int kprobe_init(void)
{
  int ret;
  kp.pre_handler = handler_pre;
  kp.post_handler = handler_post;
  kp.fault_handler = handler_fault;

  ret = register_kprobe(&kp);
  if (ret < 0) {
    pr_err("register_kprobe failed, returned %d\n", ret);
    return ret;
  }
  pr_info("Planted kprobe at %p\n", kp.addr);
  return 0;
}

static void kprobe_exit(void)
{
  unregister_kprobe(&kp);
  pr_info("kprobe at %p unregistered\n", kp.addr);
}

module_init(kprobe_init)
module_exit(kprobe_exit)
MODULE_LICENSE("GPL");

SUMMARY = "kprobe on do_sys_open kernel module."
LICENSE = "GPLv2"
LIC_FILES_CHKSUM = "file://${COMMON_LICENSE_DIR}/GPL- 2.0;md5=801f80980d171dd6425610833a22dbe6"

inherit module

PV = "0.1"

SRC_URI = " \
    file://kprobe_open.c \
    file://Makefile \
"

S = "${WORKDIR}"

obj-m  := kprobe_open.o

SRC := $(shell pwd)

all:
  $(MAKE) -C "$(KERNEL_SRC)" M="$(SRC)"

modules_install:
  $(MAKE) -C "$(KERNEL_SRC)" M="$(SRC)" modules_install

clean:
  rm -f *.o *~ core .depend .*.cmd *.ko *.mod.c
  rm -f Module.markers Module.symvers modules.order
  rm -rf .tmp_versions Modules.symvers

$ insmod kprobe_open.ko
Planted kprobe at 8010da84


pre_handler: p->addr = 0x8010da84, lr = 0x8010dc34, sp = 0xdca75f98
post_handler: p->addr = 0x8010da84, status = 0x80070013


#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/kprobes.h>
static long jdo_sys_open(int dfd, const char __user *filename, int flags, umode_t mode)
{
  pr_info("jprobe: dfd = 0x%x, filename = 0xs "
    "flags = 0x%x mode umode %x\n", dfd, filename, flags, mode);

  /* Always end with a call to jprobe_return(). */
  jprobe_return();
  return 0;
}

static struct jprobe my_jprobe = {
  .entry        = jdo_sys_open,
  .kp = {
    .symbol_name  = "do_sys_open",
  },
};

static int jprobe_init(void)
{
  int ret;

  ret = register_jprobe(&my_jprobe);
  if (ret < 0) {
    pr_err("register_jprobe failed, returned %d\n", ret);
    return -1;
  }
  pr_info("Planted jprobe at %p, handler addr %p\n",
        my_jprobe.kp.addr, my_jprobe.entry);
  return 0;
}

static void jprobe_exit(void)
{
  unregister_jprobe(&my_jprobe);
  pr_info("jprobe at %p unregistered\n", my_jprobe.kp.addr);
}

module_init(jprobe_init)
module_exit(jprobe_exit)
MODULE_LICENSE("GPL");

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/kprobes.h>
#include <linux/ktime.h>
#include <linux/limits.h>
#include <linux/sched.h>

/* per-instance private data */
struct my_data {
  ktime_t entry_stamp;
};

static int entry_handler(struct kretprobe_instance *ri, struct pt_regs *regs)
{
  struct my_data *data;

  if (!current->mm)
    return 1;  /* Skip kernel threads */

  data = (struct my_data *)ri->data;
  data->entry_stamp = ktime_get();
  return 0;
}

static int ret_handler(struct kretprobe_instance *ri, struct pt_regs *regs)
{
  int retval = regs_return_value(regs);
  struct my_data *data = (struct my_data *)ri->data;
  s64 delta;
  ktime_t now;

  now = ktime_get();
  delta = ktime_to_ns(ktime_sub(now, data->entry_stamp));
  pr_info("returned %d and took %lld ns to execute\n",
        retval, (long long)delta);
  return 0;
}

static struct kretprobe my_kretprobe = {
  .handler    = ret_handler,
  .entry_handler    = entry_handler,
  .data_size    = sizeof(struct my_data),
  .maxactive    = 20,
};

static int kretprobe_init(void)
{
  int ret;

  my_kretprobe.kp.symbol_name = "do_sys_open";
  ret = register_kretprobe(&my_kretprobe);
  if (ret < 0) {
    pr_err("register_kretprobe failed, returned %d\n",
        ret);
    return -1;
}
  pr_info("Planted return probe at %s: %p\n",
  my_kretprobe.kp.symbol_name,            my_kretprobe.kp.addr);
  return 0;
}

static void kretprobe_exit(void)
{
  unregister_kretprobe(&my_kretprobe);
  pr_info("kretprobe at %p unregistered\n",
      my_kretprobe.kp.addr);

  /* nmissed > 0 suggests that maxactive was set too low. */
  pr_info("Missed probing %d instances of %s\n",
    my_kretprobe.nmissed, my_kretprobe.kp.symbol_name);
}

module_init(kretprobe_init)
module_exit(kretprobe_exit)
MODULE_LICENSE("GPL");

# echo 'p:example_probe do_sys_open dfd=%r0 filename=%r1 flags=%r2 mode=%r3' > /sys/kernel/debug/tracing/kprobe_events


long do_sys_open(int dfd, const char __user *filename, int flags, umode_t mode);


# cat /sys/kernel/debug/tracing/kprobe_events
p:kprobes/example_probe do_sys_open dfd=%r0 filename=%r1 flags=%r2 mode=%r3


# cat /sys/kernel/debug/tracing/events/kprobes/example_probe/format
name: example_probe
ID: 1235
format:
 field:unsigned short common_type;       offset:0;      size:2; signed:0;
 field:unsigned char common_flags;       offset:2;      size:1; signed:0;
 field:unsigned char common_preempt_count;       offset:3;       size:1; signed:0;
 field:int common_pid;   offset:4;       size:4; signed:1;
 field:unsigned long __probe_ip; offset:8;       size:4; signed:0;
 field:u32 dfd;  offset:12;      size:4; signed:0;
 field:u32 filename;     offset:16;      size:4; signed:0;
 field:u32 flags;        offset:20;      size:4; signed:0;
 field:u32 mode; offset:24;      size:4; signed:0;
print fmt: "(%lx) dfd=%lx filename=%lx flags=%lx mode=%lx", REC->__probe_ip, REC->dfd, REC->filename, REC->flags, REC- >mode


# echo 1 > /sys/kernel/debug/tracing/events/kprobes/example_probe/enable


# cat /sys/kernel/debug/tracing/trace
# tracer: nop
#
# entries-in-buffer/entries-written: 59/59   #P:4
#
#                              _-----=> irqs-off
#                             / _----=> need-resched
#                            | / _---=> hardirq/softirq
#                            || / _--=> preempt-depth
#                            ||| /     delay
#           TASK-PID   CPU#  ||||    TIMESTAMP  FUNCTION
#              | |       |   ||||       |         |
 sh-737   [000] d...  1610.378856: example_probe: (do_sys_open+0x0/0x184) dfd=ffffff9c filename=f88488 flags=20241 mode=16
 sh-737   [000] d...  1660.888921: example_probe: (do_sys_open+0x0/0x184) dfd=ffffff9c filename=f88a88 flags=20241 mode=16


# echo '-:example_probe' >> /sys/kernel/debug/tracing/kprobe_events


# echo > /sys/kernel/debug/tracing/kprobe_events


# cat /sys/kernel/debug/tracing/kprobe_profile
example_probe                             78               0


<event name> <hits> <miss-hits>


<type>:<event name> <symbol> <fetch arguments>


<name>=<offset>(<argument>):<type>


b<bit-width>@<bit-offset>/<container-size>

EXTRA_IMAGE_FEATURES = "tools-profile dbg-pkgs"

IMAGE_INSTALL_append = " perf"

EXTRA_IMAGE_FEATURES += "tools-profile"

INHIBIT_PACKAGE_STRIP = "1"

EXTRA_IMAGE_FEATURES += "dbg-pkgs"

PACKAGE_DEBUG_SPLIT_STYLE = 'debug-file-directory'

-PERF_FEATURES_ENABLE = ""

# perf stat <command>


# perf stat ping -c 1 192.168.1.1
PING 192.168.1.1 (192.168.1.1): 56 data bytes
64 bytes from 192.168.1.1: seq=0 ttl=64 time=6.489 ms

--- 192.168.1.1 ping statistics ---
1 packets transmitted, 1 packets received, 0% packet loss
round-trip min/avg/max = 6.489/6.489/6.489 ms

 Performance counter stats for 'ping -c 1 192.168.1.1':

 8.984333 task-clock                #    0.360 CPUs utilized
 15 context-switches          #    0.002 M/sec
 0 cpu-migrations            #    0.000 K/sec
 140 page-faults               #    0.016 M/sec
 3433188 cycles                    #    0.382 GHz
 123948 stalled-cycles-frontend   #    3.61% frontend cycles idle 
 418329 stalled-cycles-backend    #   12.18% backend  cycles idle 
 234497 instructions              #    0.07  insns per cycle 
 #    1.78  stalled cycles per insn
 22649 branches                  #    2.521 M/sec
 8123 branch-misses             #   35.86% of all branches 

 0.024962333 seconds time elapsed


# perf record <command>


# perf record -g -- ping -c 1 192.168.1.1


# perf report


# perf report –stdio


# perf annotate -d <command>


# perf stat -a sleep 5
Performance counter stats for 'sleep 5':
 5006.660002 task-clock                #    1.000 CPUs utilized[100.00%]
 324 context-switches          #    0.065 K/sec [100.00%]
 0 cpu-migrations            #    0.000 K/sec [100.00%]
 126 page-faults               #    0.025 K/sec
 12200175 cycles                    #    0.002 GHz [100.00%]
 2844703 stalled-cycles-frontend   #   23.32% frontend cycles idle    [100.00%]
 9152564 stalled-cycles-backend    #   75.02% backend  cycles idle    [100.00%]
 4645466 instructions              #    0.38  insns per cycle 
 #    1.97  stalled cycles per insn [100.00%]
 479051 branches                  #    0.096 M/sec [100.00%]
 222903 branch-misses             #   46.53% of all branches 

 5.006115001 seconds time elapsed


# perf record -a -g -- sleep 5


perf stat|record [-e <comma separated event list> --filter '<expr>'] [-o <filename>] [--] <command> [<arguments>]


# perf list


# perf list '<subsystem>:*'


# perf stat -e r3 sleep 5


# perf script


# perf script -g python


# perf script -s perf-script.py


IMAGE_INSTALL_append = " perf-python"

# perf probe --add "tcp_sendmsg"
Added new event:
 probe:tcp_sendmsg    (on tcp_sendmsg)


# perf record -e probe:tcp_sendmsg -a -g -- wget http://downloads.yoctoproject.org/releases/yocto/yocto- 1.7.1/RELEASENOTES
Connecting to downloads.yoctoproject.org (198.145.29.10:80)
RELEASENOTES         100% |**************************************************************************************| 11924   0:00:00 ETA
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.025 MB perf.data (~1074 samples) ]


# perf report


nameserver 8.8.8.8
nameserver 8.8.4.4


# perf probe --del tcp_sendmsg
/sys/kernel/debug//tracing/uprobe_events file does not exist - please rebuild kernel with CONFIG_UPROBE_EVENT.
Removed event: probe:tcp_sendmsg


# perf timechart record -- <command> <arguments>


# perf timechart


# perf trace record <command>


Makefile:681: No libaudit.h found, disables 'trace' tool, please install audit-libs-devel or libaudit-dev


IMAGE_INSTALL_append = " systemtap"

EXTRA_IMAGE_FEATURES += "ssh-server-openssh"

probe begin
{
        print("Monitoring starts\n")
        printf("%6s %6s %16s\n", "UID", "PID", "NAME");
}

probe kernel.function("sys_open")
{
          printf("%6d %6d %16s\n", uid(), pid(), execname());
}

probe timer.s(60)
{
        print("Monitoring ends\n")
        exit()
}

$ source setup-environment wandboard-quad
$ crosstap root@<target_ip> sys_open.stp


 IMAGE_INSTALL_append += " oprofile"

EXTRA_IMAGE_FEATURES += "tools-profile"

DEBUG_BUILD = "1"

# modprobe oprofile timer=1


# opcontrol --start --vmlinux=/boot/vmlinux --callgraph 5
Using 2.6+ OProfile kernel interface.
Reading module info.
Using log file /var/lib/oprofile/samples/oprofiled.log
Daemon started.
Profiler running.


# ping -c 1 192.168.1.1
PING 192.168.1.1 (192.168.1.1): 56 data bytes
64 bytes from 192.168.1.1: seq=0 ttl=64 time=5.421 ms

--- 192.168.1.1 ping statistics ---
1 packets transmitted, 1 packets received, 0% packet loss
round-trip min/avg/max = 5.421/5.421/5.421 ms


 # opcontrol --stop


# ln -s /boot/vmlinux-3.10.17-1.0.2- wandboard+gbe8d6872b5eb /boot/vmlinux


Count 100000 for event CPU_CYCLES is below the minimum 1500000


# opcontrol --setup --event=CPU_CYCLES:1500000


# opreport -f
Using /var/lib/oprofile/samples/ for samples directory.
CPU: ARM Cortex-A9, speed 996000 MHz (estimated)
Counted CPU_CYCLES events (CPU cycle) with a unit mask of 0x00 (No unit mask) count 1500000
CPU_CYCLES:150...|
 samples|      %|
------------------
 401 83.0228 /boot/vmlinux-3.10.17-1.0.2-wandboard+gbe8d6872b5eb
 31  6.4182 /bin/bash
 28  5.7971 /lib/libc-2.20.so
 18  3.7267 /lib/ld-2.20.so
 3  0.6211 /usr/bin/oprofiled
 1  0.2070 /usr/bin/ophelp
 1  0.2070 /usr/sbin/sshd


# opreport -cl
Using /var/lib/oprofile/samples/ for samples directory.
warning: [heap] (tgid:790 range:0x3db000-0x4bc000) could not be found.
warning: [stack] (tgid:785 range:0x7ee11000-0x7ee32000) could not be found.
CPU: ARM Cortex-A9, speed 996000 MHz (estimated)
Counted CPU_CYCLES events (CPU cycle) with a unit mask of 0x00 (No unit mask) count 1500000
samples  %        app name                 symbol name
-------------------------------------------------------------------------------
 102      48.8038  vmlinux-3.10.17-1.0.2-wandboard+gbe8d6872b5eb __do_softirq
 107      51.1962  vmlinux-3.10.17-1.0.2-wandboard+gbe8d6872b5eb do_softirq
102      21.1180  vmlinux-3.10.17-1.0.2-wandboard+gbe8d6872b5eb __do_softirq
 102      47.4419  vmlinux-3.10.17-1.0.2-wandboard+gbe8d6872b5eb __do_softirq
 102      47.4419  vmlinux-3.10.17-1.0.2-wandboard+gbe8d6872b5eb __do_softirq [self]
 7         3.2558  vmlinux-3.10.17-1.0.2-wandboard+gbe8d6872b5eb net_rx_action
 4         1.8605  vmlinux-3.10.17-1.0.2-wandboard+gbe8d6872b5eb run_timer_softirq
--------------------------------------------------------------------- ----------
31        6.4182  bash                     /bin/bash


opcontrol --no-vmlinux <options>

opcontrol --vmlinux=/boot/path/to/vmlinux <options>

# opcontrol --status
Daemon not running
Session-dir: /var/lib/oprofile
Separate options: library kernel
vmlinux file: /boot/vmlinux
Image filter: none
Call-graph depth: 5


opreport <options>

IMAGE_INSTALL_append = " lttng-tools lttng-modules lttng-ust"

EXTRA_IMAGE_FEATURES += "tools-profile"

# lttng create test-session
Session test-session created.
Traces will be written in /home/root/lttng-traces/test- session-20150117-174945


# lttng enable-event --kernel sched_switch,sched_process_fork
Warning: No tracing group detected
Kernel event sched_switch created in channel channel0
Kernel event sched_process_fork created in channel channel0


# lttng list --kernel


# lttng start
Tracing started for session test-session


# ping -c 1 192.168.1.1


# lttng stop
Waiting for data availability.
Tracing stopped for session test-session


# lttng destroy
Session test-session destroyed


# babeltrace /home/root/lttng-traces/test-session-20150117- 174945


#include <stdio.h>
#include <lttng/tracef.h>

main(void)
{
    printf("Hello World");
    tracef("I said: %s", "Hello World");
}

DESCRIPTION = "Simple helloworld application"
SECTION = "examples"
LICENSE = "MIT"
LIC_FILES_CHKSUM = "file://${COMMON_LICENSE_DIR}/MIT;md5=0835ade698e0bcf8506ecda2f7b4 f302"

SRC_URI = "file://helloworld.c"
DEPENDS = "lttng-ust"

S = "${WORKDIR}"

do_compile() {
             ${CC} helloworld.c -llttng-ust -o helloworld
}

do_install() {
             install -d ${D}${bindir}
             install -m 0755 helloworld ${D}${bindir}
}

# lttng create test-user-session
Session test-user-session created.
Traces will be written in /home/root/lttng-traces/test-user- session-20150117-185731


# lttng enable-event -u -a
Warning: No tracing group detected
All UST events are enabled in channel channel0


# lttng start
Tracing started for session test-user-session


# helloworld
Hello World


# lttng stop
Waiting for data availability.
Tracing stopped for session test-user-session


# lttng view
[18:58:22.625557512] (+0.001278334) wandboard-quad lttng_ust_tracef:event: { cpu_id = 0 }, { _msg_length = 19, msg = "I said: Hello World" }


# lttng destroy test-user-session
Session test-user-session destroyed


# lttng enable-event <comma separated event list> -k


# lttng enable-event -a -k --tracepoint


# lttng enable-event -a -k --syscall


# lttng enable-event -a -k


# lttng enable-event <probe_name> -k --probe <symbol>+<offset>


# lttng enable-event <probe_name> -k --probe <address>


# lttng enable-event <probe_name> -k --function <symbol>


# lttng add-context -t perf:cpu:cpu-cycles -k


EXTRA_IMAGE_FEATURES += "tools-sdk dev-pkgs"

TRACEPOINT_EVENT(
    hello_world_trace_provider,
    hw_tracepoint,
    TP_ARGS(
        int, my_integer_arg,
        char*, my_string_arg
    ),
    TP_FIELDS(
        ctf_string(my_string_field, my_string_arg)
        ctf_integer(int, my_integer_field, my_integer_arg)
    )
)

# lttng-gen-tp hw.tp


IMAGE_INSTALL_append = " lttng-ust-bin"


#include <stdio.h>
#include "hw.h"

main(void)
{
    printf("Hello World");
    tracepoint(hello_world_trace_provider,  hw_tracepoint, 1, "I said: Hello World");
}

# gcc -o hw helloworld.c hw.o -llttng-ust -ldl


EXTRA_IMAGE_FEATURES = "tools-sdk dev-pkgs"


# lttng create test-session
Spawning a session daemon
Warning: No tracing group detected
Session test-session created.
Traces will be written in /home/root/lttng-traces/test- session-20150117-195930


# lttng enable-event --userspace hello_world_trace_provider:hw_tracepoint
Warning: No tracing group detected
UST event hello_world_trace_provider:hw_tracepoint created in channel channel0


# lttng start
Tracing started for session test-session


#./hw
Hello World


# lttng stop


# lttng view
[20:00:43.537630037] (+?.?????????) wandboard-quad hello_world_trace_provider:hw_tracepoint: { cpu_id = 0 }, { my_string_field = "I said: Hello World", my_integer_field = 1 }


# lttng destroy test-session


IMAGE_INSTALL_append = " blktrace"

# mount -t ext2 /dev/mmcblk0p2 /mnt
EXT2-fs (mmcblk0p2): warning: mounting ext3 filesystem as ext2
EXT2-fs (mmcblk0p2): warning: mounting unchecked fs, running e2fsck is recommended


# blktrace /dev/mmcblk0


# dd if=/dev/urandom of=/mnt/home/root/random-10k-file bs=1k count=10 conv=fsync
10+0 records in
10+0 records out
10240 bytes (10 kB) copied, 0.00585167 s, 1.7 MB/s


^C=== mmcblk0 ===
  CPU  0:                   30 events,        2 KiB data
 Total:                    30 events (dropped 0),        2 KiB data


# blkparse mmcblk0


Input file mmcblk0.blktrace.0 added
179,0    0        1     0.000000000   521  A   W 1138688 + 8 <- (179,2) 1114112
179,0    0        2     0.000003666   521  Q   W 1138688 + 8 [kworker/u8:0]
179,0    0        3     0.000025333   521  G   W 1138688 + 8 [kworker/u8:0]
179,0    0        4     0.000031000   521  P   N [kworker/u8:0]
179,0    0        5     0.000044666   521  I   W 1138688 + 8 [kworker/u8:0]
179,0    0        0     0.000056666     0  m   N cfq519A  insert_request
179,0    0        0     0.000063000     0  m   N cfq519A  add_to_rr
179,0    0        6     0.000081000   521  U   N [kworker/u8:0] 1
179,0    0        0     0.000121000     0  m   N cfq workload slice:6
179,0    0        0     0.000132666     0  m   N cfq519A  set_active wl_class:0 wl_type:0
179,0    0        0     0.000141333     0  m   N cfq519A  Not idling. st->count:1
179,0    0        0     0.000150000     0  m   N cfq519A  fifo=  (null)
179,0    0        0     0.000156000     0  m   N cfq519A  dispatch_insert
179,0    0        0     0.000167666     0  m   N cfq519A  dispatched a request
179,0    0        0     0.000175000     0  m   N cfq519A  activate rq, drv=1
179,0    0        7     0.000181333    83  D   W 1138688 + 8 [mmcqd/2]
179,0    0        8     0.735417000    83  C   W 1138688 + 8 [0]
179,0    0        0     0.739904333     0  m   N cfq519A  complete rqnoidle 0
179,0    0        0     0.739910000     0  m   N cfq519A  set_slice=4
179,0    0        0     0.739912000     0  m   N cfq schedule dispatch
CPU0 (mmcblk0):
 Reads Queued:           0,        0KiB  Writes Queued:1,4KiB
 Read Dispatches:        0,        0KiB  Write Dispatches:1,4KiB
 Reads Requeued:         0               Writes Requeued:0
 Reads Completed:        0,        0KiB  Writes Completed:1,4KiB
 Read Merges:            0,        0KiB  Write Merges:0,0KiB
 Read depth:             0               Write depth:1
 IO unplugs:             1               Timer unplugs:0

Throughput (R/W): 0KiB/s / 5KiB/s
Events (mmcblk0): 20 entries
Skips: 0 forward (0 -   0.0%)

179,0    0        7     0.000181333    83  D   W 1138688 + 8 [mmcqd/2]


<mayor,minor> <cpu> <seq_nr> <timestamp> <pid> <actions> <rwbs> <start block> + <nr of blocks> <command>


# blktrace /dev/mmcblk0 -o - | blkparse -i -


# btrace /dev/mmcblk0


# blktrace -l /dev/mmcblk0


$ blktrace -d /dev/mmcblk0 -h <target_ip>


# dd if=/dev/urandom of=/mnt/home/root/random-10k-file bs=1k count=10 conv=fsync
10+0 records in
10+0 records out
10240 bytes (10 kB) copied, 0.00585167 s, 1.7 MB/s



类型	符号	描述
紧急	`KERN_EMERG`	系统不稳定且即将崩溃
警告	`KERN_ALERT`	需要立即采取行动
严重	`KERN_CRIT`	严重的软件或硬件故障
错误	`KERN_ERR`	错误条件
警告	`KERN_WARNING`	没有严重问题，但可能暗示有问题
通知	`KERN_NOTICE`	没有什么严重问题，但用户应注意
信息	`KERN_INFO`	系统信息
调试	`KERN_DEBUG`	调试信息

设备消息	一般消息	Printk 符号
`dev_emerg`	`pr_emerg`	`KERN_EMERG`
`dev_alert`	`pr_alert`	`KERN_ALERT`
`dev_crit`	`pr_crit`	`KERN_CRIT`
`dev_err`	`pr_err`	`KERN_ERR`
`dev_warn`	`pr_warn`	`KERN_WARNING`
`dev_notice`	`pr_notice`	`KERN_NOTICE`
`dev_info`	`pr_info`	`KERN_INFO`
`dev_dbg`	`pr_debug`	`KERN_DEBUG`

Sysvinit	运行级别	Systemd 目标	备注
0	`runlevel0.target`	`poweroff.target`	关闭系统。
1, s, single	`runlevel1.target`	`rescue.target`	单用户模式。
2, 4	`runlevel2.target`, `runlevel4.target`	`multi-user.target`	用户定义的/特定站点的运行级别。默认情况下，与`3`相同。
3	`runlevel3.target`	`multi-user.target`	多用户、非图形模式。用户通常可以通过多个控制台或网络登录。
5	`runlevel5.target`	`graphical.target`	多用户、图形模式。通常包括运行级别 3 的所有服务以及图形登录。
6	`runlevel6.target`	`reboot.target`	重启系统。

龙哥盟

掠夺·扩张·投机·博弈

嵌入式 Linux 项目指南：使用 Yocto 项目（全）

前言

本书内容

本书所需的条件

本书适合谁阅读

章节

准备工作

如何做…

工作原理…

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另见

约定

注意

提示

读者反馈

客户支持

下载示例代码

勘误

盗版

问题

第一章：构建系统

介绍

设置主机系统

准备工作

如何操作...

提示

如何操作...

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另见

安装 Poky

准备工作

如何操作...

注意

它是如何工作的...

还有更多...

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创建构建目录

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提示

它是如何工作的...

注意

还有更多...

构建您的第一个镜像

准备工作

如何操作...

它是如何工作的...

还有更多...

解释 Freescale Yocto 生态系统

准备工作

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它的工作原理...

还有更多...

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安装对 Freescale 硬件的支持

准备就绪

它是如何做的...

它是如何工作的...

还有更多...

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构建 Wandboard 镜像

如何操作...

注意

如何操作...

注意

提示

另请参见

故障排除 Wandboard 的首次启动

准备工作

注意

如何操作...

还有更多...

为开发环境配置网络启动

准备就绪

安装 TFTP 服务器

安装 NFS 服务器

如何操作...