作者：彭东林
邮箱：pengdonglin137@163.com
QQ：405728433
环境
主机： ubuntu14.04 64bit
开发板： qemu + vexpress-a9 （参考： ）
工具链： arm-none-linux-gnueabi-gcc (gcc version 4.8.3 20140320)
Python版本：
参考
正文
1、下载解压python源码
到下载最新的python2系列的软件，这里我用的是
1 #解压2 tar -xf Python-2.7.13.tar.xz3 4 #创建python2_7_13_for_x86_645 mkdir python2_7_13_for_x86_646 7 #创建python2_7_13_for_arm8 mkdir python2_7_13_for_arm
2、编译x86_64版本的python软件
我把编译过程写成了脚本， 进入python2_7_13_for_x86_64/目录，然后执行如下脚本：
-
配置 mk1_conf.sh
1 #!/bin/bash2 3 ../Python-2.7.13/configure --prefix=`pwd`
-
编译mk2_make.sh
1 #!/bin/bash2 3 make -j4
-
安装 mk3_install.sh
1 #!/bin/bash2 3 make install
3、交叉编译
交叉编译的第一步是为python源码打上交叉编译用的patch：
1 cd Python-2.7.13/2 patch -p1 < ../python2_7_13_for_arm/Python-2.7.13-xcompile.patch
我也把编译过程放到脚本，也分为三个：
-
配置 mk1_conf.sh
1 #!/bin/bash2 export PATH=/home/pengdonglin/src/qemu/aarch32/arm-2014.05/bin:$PATH3 ../Python-2.7.13/configure --prefix=`pwd` \4 --host=arm-none-linux-gnueabi \5 --build=x86_64-linux-gnu \6 --enable-ipv6 \7 --enable-shared \8 ac_cv_file__dev_ptmx="yes" \9 ac_cv_file__dev_ptc="no"
-
编译 mk2_make.sh
1 #!/bin/bash 2 export PATH=/home/pengdonglin/src/qemu/aarch32/arm-2014.05/bin:$PATH 3 make HOSTPYTHON=../python2_7_13_for_x86_64/python \ 4 HOSTPGEN=../python2_7_13_for_x86_64/Parser/pgen \ 5 BLDSHARED="arm-none-linux-gnueabi-gcc -shared" \ 6 CROSS_COMPILE=arm-none-linux-gnueabi- \ 7 CROSS_COMPILE_TARGET=yes \ 8 HOSTARCH=arm-none-linux-gnueabi \ 9 BUILDARCH=x86_64-linux-gnu \10 -j4
-
安装 mk3_install.sh
1 #!/bin/bash2 export PATH=/home/pengdonglin/src/qemu/aarch32/arm-2014.05/bin:$PATH3 make install HOSTPYTHON=../python2_7_13_for_x86_64/python \4 BLDSHARED="arm-none-linux-gnueabi-gcc -shared" \5 CROSS_COMPILE=arm-none-linux-gnueabi- \6 CROSS_COMPILE_TARGET=yes \7 prefix=`pwd`
4、重新制作ramdisk镜像
参考博文：
修改mk_ramdisk.sh如下：
1 #!/bin/bash 2 sudo rm -rf rootfs 3 sudo rm -rf tmpfs 4 sudo rm -rf ramdisk* 5 sudo mkdir rootfs 6 sudo cp ../busybox-1.24.2/_install/* rootfs/ -raf 7 sudo mkdir -p rootfs/proc/ 8 sudo mkdir -p rootfs/sys/ 9 sudo mkdir -p rootfs/tmp/10 sudo mkdir -p rootfs/root/11 sudo mkdir -p rootfs/var/12 sudo mkdir -p rootfs/mnt/13 sudo cp etc rootfs/ -arf14 sudo cp -arf ../arm-2014.05/arm-none-linux-gnueabi/libc/lib rootfs/15 sudo rm -rf rootfs/lib/*.a16 sudo /home/pengdonglin/src/qemu/aarch32/arm-2014.05/bin/arm-none-linux-gnueabi-strip rootfs/lib/*17 # 拷贝python相关的文件到根文件系统中18 sudo mkdir -p rootfs/usr19 pushd rootfs/usr20 sudo cp -raf /home/pengdonglin/src/qemu/python_cross_compile/python2_7_13_for_arm/lib .21 sudo cp -raf /home/pengdonglin/src/qemu/python_cross_compile/python2_7_13_for_arm/include .22 sudo cp -raf /home/pengdonglin/src/qemu/python_cross_compile/python2_7_13_for_arm/bin .23 sudo cp -raf /home/pengdonglin/src/qemu/python_cross_compile/python2_7_13_for_arm/share .24 sudo /home/pengdonglin/src/qemu/aarch32/arm-2014.05/bin/arm-none-linux-gnueabi-strip lib/python*25 popd26 sudo mkdir -p rootfs/dev/27 sudo mknod rootfs/dev/tty1 c 4 128 sudo mknod rootfs/dev/tty2 c 4 229 sudo mknod rootfs/dev/tty3 c 4 330 sudo mknod rootfs/dev/tty4 c 4 431 sudo mknod rootfs/dev/console c 5 132 sudo mknod rootfs/dev/null c 1 333 sudo mkdir -p rootfs/lib/modules/4\.10\.0\+34 sudo mkdir -p rootfs/tools35 sudo cp ./other_tools/* rootfs/tools36 # 将ramdisk的大小扩展为100MB37 sudo dd if=/dev/zero of=ramdisk bs=1M count=10038 sudo mkfs.ext4 -F ramdisk39 sudo mkdir -p tmpfs40 sudo mount -t ext4 ramdisk ./tmpfs/ -o loop41 sudo cp -raf rootfs/* tmpfs/42 sudo umount tmpfs43 sudo gzip --best -c ramdisk > ramdisk.gz44 sudo mkimage -n "ramdisk" -A arm -O linux -T ramdisk -C gzip -d ramdisk.gz ramdisk.img
这里需要注意：
1、将刚才交叉编译python所得的文件拷贝到rootfs/usr下面： bin、lib、include和share
2、由于Python的lib目录占用了很大空间，有70MB左右，所以这里我们把ramdisk的大小设置为100MB
3、此外，qemu-system-arm运行的，可以给-m设置较大的物理内存，这里我设置的是1GB
5、修改kernel配置
修改ramdisk的大小设置， 这里我设置的是100MB：
1 Device Drivers ---> 2 3 [*] Block devices --->4 5 (102400) Default RAM disk size (kbytes)
6、测试
制作好ramdisk以及编译出新的kernel后，运行系统：
1 sudo qemu-system-arm \ 2 -M vexpress-a9 \ 3 -m 1024M \ 4 -smp 2 \ 5 -kernel ./linux-4.10/out_aarch32/arch/arm/boot/zImage \ 6 -nographic \ 7 -append "root=/dev/ram0 rw rootfstype=ext4 console=ttyAMA0 init=/linuxrc ignore_loglevel" \ 8 -initrd ./rootfs/ramdisk.img \ 9 -net nic,vlan=0 -net tap,vlan=0,ifname=tap0 \10 -dtb ./linux-4.10/out_aarch32/arch/arm/boot/dts/vexpress-v2p-ca9.dtb
下面是启动log：
1 $./run.sh 2 sudo tunctl -u root -t tap0 3 TUNSETIFF: Device or resource busy 4 sudo ifconfig tap0 0.0.0.0 promisc up 5 sudo brctl addif br0 tap0 6 brctl show 7 bridge name bridge id STP enabled interfaces 8 br0 8000.480fcf3ace87 no eth0 9 tap0 10 docker0 8000.02423772cc85 no 11 [ 0.000000] Booting Linux on physical CPU 0x0 12 [ 0.000000] Linux version 4.10.0+ (pengdonglin@pengdonglin-HP) (gcc version 4.8.3 20140320 (prerelease) (Sourcery CodeBench Lite 2014.05-29) ) #10 SMP Mon Mar 20 11:31:00 CST 2017 13 [ 0.000000] CPU: ARMv7 Processor [410fc090] revision 0 (ARMv7), cr=10c5387d 14 [ 0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT nonaliasing instruction cache 15 [ 0.000000] OF: fdt:Machine model: V2P-CA9 16 [ 0.000000] debug: ignoring loglevel setting. 17 [ 0.000000] Memory policy: Data cache writealloc 18 [ 0.000000] On node 0 totalpages: 262144 19 [ 0.000000] free_area_init_node: node 0, pgdat c0a637c0, node_mem_map ef7fa000 20 [ 0.000000] Normal zone: 1536 pages used for memmap 21 [ 0.000000] Normal zone: 0 pages reserved 22 [ 0.000000] Normal zone: 196608 pages, LIFO batch:31 23 [ 0.000000] HighMem zone: 65536 pages, LIFO batch:15 24 [ 0.000000] percpu: Embedded 14 pages/cpu @ef7b5000 s27648 r8192 d21504 u57344 25 [ 0.000000] pcpu-alloc: s27648 r8192 d21504 u57344 alloc=14*4096 26 [ 0.000000] pcpu-alloc: [0] 0 [0] 1 [0] 2 [0] 3 27 [ 0.000000] Built 1 zonelists in Zone order, mobility grouping on. Total pages: 260608 28 [ 0.000000] Kernel command line: root=/dev/ram0 rw rootfstype=ext4 console=ttyAMA0 init=/linuxrc ignore_loglevel 29 [ 0.000000] log_buf_len individual max cpu contribution: 4096 bytes 30 [ 0.000000] log_buf_len total cpu_extra contributions: 12288 bytes 31 [ 0.000000] log_buf_len min size: 16384 bytes 32 [ 0.000000] log_buf_len: 32768 bytes 33 [ 0.000000] early log buf free: 14860(90%) 34 [ 0.000000] PID hash table entries: 4096 (order: 2, 16384 bytes) 35 [ 0.000000] Dentry cache hash table entries: 131072 (order: 7, 524288 bytes) 36 [ 0.000000] Inode-cache hash table entries: 65536 (order: 6, 262144 bytes) 37 [ 0.000000] Memory: 1007212K/1048576K available (6144K kernel code, 453K rwdata, 1440K rodata, 1024K init, 191K bss, 41364K reserved, 0K cma-reserved, 262144K highmem) 38 [ 0.000000] Virtual kernel memory layout: 39 [ 0.000000] vector : 0xffff0000 - 0xffff1000 ( 4 kB) 40 [ 0.000000] fixmap : 0xffc00000 - 0xfff00000 (3072 kB) 41 [ 0.000000] vmalloc : 0xf0800000 - 0xff800000 ( 240 MB) 42 [ 0.000000] lowmem : 0xc0000000 - 0xf0000000 ( 768 MB) 43 [ 0.000000] pkmap : 0xbfe00000 - 0xc0000000 ( 2 MB) 44 [ 0.000000] modules : 0xbf000000 - 0xbfe00000 ( 14 MB) 45 [ 0.000000] .text : 0xc0008000 - 0xc0700000 (7136 kB) 46 [ 0.000000] .init : 0xc0900000 - 0xc0a00000 (1024 kB) 47 [ 0.000000] .data : 0xc0a00000 - 0xc0a71784 ( 454 kB) 48 [ 0.000000] .bss : 0xc0a73000 - 0xc0aa2c4c ( 192 kB) 49 [ 0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=4, Nodes=1 50 [ 0.000000] Hierarchical RCU implementation. 51 [ 0.000000] Build-time adjustment of leaf fanout to 32. 52 [ 0.000000] RCU restricting CPUs from NR_CPUS=8 to nr_cpu_ids=4. 53 [ 0.000000] RCU: Adjusting geometry for rcu_fanout_leaf=32, nr_cpu_ids=4 54 [ 0.000000] NR_IRQS:16 nr_irqs:16 16 55 [ 0.000000] L2C: platform modifies aux control register: 0x02020000 -> 0x02420000 56 [ 0.000000] L2C: DT/platform modifies aux control register: 0x02020000 -> 0x02420000 57 [ 0.000000] L2C-310 enabling early BRESP for Cortex-A9 58 [ 0.000000] L2C-310 full line of zeros enabled for Cortex-A9 59 [ 0.000000] L2C-310 dynamic clock gating disabled, standby mode disabled 60 [ 0.000000] L2C-310 cache controller enabled, 8 ways, 128 kB 61 [ 0.000000] L2C-310: CACHE_ID 0x410000c8, AUX_CTRL 0x46420001 62 [ 0.000000] smp_twd: clock not found -2 63 [ 0.000206] sched_clock: 32 bits at 24MHz, resolution 41ns, wraps every 89478484971ns 64 [ 0.002899] clocksource: arm,sp804: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 1911260446275 ns 65 [ 0.003447] Failed to initialize '/smb@04000000/motherboard/iofpga@7,00000000/timer@12000': -22 66 [ 0.006792] Console: colour dummy device 80x30 67 [ 0.007168] Calibrating local timer... 94.56MHz. 68 [ 0.063191] Calibrating delay loop... 869.99 BogoMIPS (lpj=4349952) 69 [ 0.148244] pid_max: default: 32768 minimum: 301 70 [ 0.149235] Mount-cache hash table entries: 2048 (order: 1, 8192 bytes) 71 [ 0.149279] Mountpoint-cache hash table entries: 2048 (order: 1, 8192 bytes) 72 [ 0.158258] CPU: Testing write buffer coherency: ok 73 [ 0.158718] ftrace: allocating 20771 entries in 61 pages 74 [ 0.580570] CPU0: thread -1, cpu 0, socket 0, mpidr 80000000 75 [ 0.584830] Setting up static identity map for 0x60100000 - 0x60100058 76 [ 0.591663] smp: Bringing up secondary CPUs ... 77 [ 0.677810] CPU1: thread -1, cpu 1, socket 0, mpidr 80000001 78 [ 1.623456] CPU2: failed to boot: -38 79 [ 2.569146] CPU3: failed to boot: -38 80 [ 2.569341] smp: Brought up 1 node, 2 CPUs 81 [ 2.569417] SMP: Total of 2 processors activated (1739.98 BogoMIPS). 82 [ 2.569500] CPU: All CPU(s) started in SVC mode. 83 [ 2.599822] devtmpfs: initialized 84 [ 2.617472] VFP support v0.3: implementor 41 architecture 3 part 30 variant 9 rev 0 85 [ 2.631508] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns 86 [ 2.632028] futex hash table entries: 1024 (order: 4, 65536 bytes) 87 [ 2.671232] NET: Registered protocol family 16 88 [ 2.675992] DMA: preallocated 256 KiB pool for atomic coherent allocations 89 [ 2.853307] cpuidle: using governor ladder 90 [ 2.853708] hw-breakpoint: debug architecture 0x4 unsupported. 91 [ 2.854172] Serial: AMBA PL011 UART driver 92 [ 2.860429] OF: amba_device_add() failed (-19) for /memory-controller@100e0000 93 [ 2.862876] OF: amba_device_add() failed (-19) for /memory-controller@100e1000 94 [ 2.863329] OF: amba_device_add() failed (-19) for /watchdog@100e5000 95 [ 2.865275] irq: type mismatch, failed to map hwirq-75 for /interrupt-controller@1e001000! 96 [ 2.877129] 10009000.uart: ttyAMA0 at MMIO 0x10009000 (irq = 38, base_baud = 0) is a PL011 rev1 97 [ 2.889012] console [ttyAMA0] enabled 98 [ 2.893012] 1000a000.uart: ttyAMA1 at MMIO 0x1000a000 (irq = 39, base_baud = 0) is a PL011 rev1 99 [ 2.895140] 1000b000.uart: ttyAMA2 at MMIO 0x1000b000 (irq = 40, base_baud = 0) is a PL011 rev1100 [ 2.896620] 1000c000.uart: ttyAMA3 at MMIO 0x1000c000 (irq = 41, base_baud = 0) is a PL011 rev1101 [ 2.897695] OF: amba_device_add() failed (-19) for /smb@04000000/motherboard/iofpga@7,00000000/wdt@0f000102 [ 2.979213] SCSI subsystem initialized103 [ 2.980067] libata version 3.00 loaded.104 [ 2.981102] usbcore: registered new interface driver usbfs105 [ 2.981415] usbcore: registered new interface driver hub106 [ 2.981690] usbcore: registered new device driver usb107 [ 2.988362] Advanced Linux Sound Architecture Driver Initialized.108 [ 3.011566] clocksource: Switched to clocksource arm,sp804109 [ 3.159190] NET: Registered protocol family 2110 [ 3.164055] TCP established hash table entries: 8192 (order: 3, 32768 bytes)111 [ 3.164307] TCP bind hash table entries: 8192 (order: 4, 65536 bytes)112 [ 3.164553] TCP: Hash tables configured (established 8192 bind 8192)113 [ 3.166386] UDP hash table entries: 512 (order: 2, 16384 bytes)114 [ 3.166801] UDP-Lite hash table entries: 512 (order: 2, 16384 bytes)115 [ 3.167985] NET: Registered protocol family 1116 [ 3.171676] RPC: Registered named UNIX socket transport module.117 [ 3.171948] RPC: Registered udp transport module.118 [ 3.172020] RPC: Registered tcp transport module.119 [ 3.172115] RPC: Registered tcp NFSv4.1 backchannel transport module.120 [ 3.177825] Trying to unpack rootfs image as initramfs...121 [ 3.184610] rootfs image is not initramfs (no cpio magic); looks like an initrd122 [ 3.416590] Freeing initrd memory: 22120K123 [ 3.420686] hw perfevents: enabled with armv7_cortex_a9 PMU driver, 1 counters available124 [ 3.430377] workingset: timestamp_bits=30 max_order=18 bucket_order=0125 [ 3.457911] squashfs: version 4.0 (2009/01/31) Phillip Lougher126 [ 3.463134] jffs2: version 2.2. (NAND) © 2001-2006 Red Hat, Inc.127 [ 3.464581] 9p: Installing v9fs 9p2000 file system support128 [ 3.470989] bounce: pool size: 64 pages129 [ 3.471215] io scheduler noop registered (default)130 [ 3.475569] clcd-pl11x 10020000.clcd: PL111 designer 41 rev2 at 0x10020000131 [ 3.483346] clcd-pl11x 10020000.clcd: /clcd@10020000 hardware, 1024x768@59 display132 [ 3.602322] Console: switching to colour frame buffer device 128x48133 [ 3.617254] clcd-pl11x 1001f000.clcd: PL111 designer 41 rev2 at 0x1001f000134 [ 3.619006] clcd-pl11x 1001f000.clcd: /smb@04000000/motherboard/iofpga@7,00000000/clcd@1f000 hardware, 640x480@59 display135 [ 3.984710] brd: module loaded136 [ 3.991353] 40000000.flash: Found 2 x16 devices at 0x0 in 32-bit bank. Manufacturer ID 0x000000 Chip ID 0x000000137 [ 3.991791] Intel/Sharp Extended Query Table at 0x0031138 [ 3.992447] Using buffer write method139 [ 3.992792] erase region 0: offset=0x0,size=0x80000,blocks=128140 [ 3.994929] 40000000.flash: Found 2 x16 devices at 0x0 in 32-bit bank. Manufacturer ID 0x000000 Chip ID 0x000000141 [ 3.995125] Intel/Sharp Extended Query Table at 0x0031142 [ 3.995600] Using buffer write method143 [ 3.995708] erase region 0: offset=0x0,size=0x80000,blocks=128144 [ 3.995876] Concatenating MTD devices:145 [ 3.995986] (0): "40000000.flash"146 [ 3.996076] (1): "40000000.flash"147 [ 3.996153] into device "40000000.flash"148 [ 4.011057] libphy: Fixed MDIO Bus: probed149 [ 4.068484] libphy: smsc911x-mdio: probed150 [ 4.071230] smsc911x 4e000000.ethernet eth0: MAC Address: 52:54:00:12:34:56151 [ 4.179313] isp1760 4f000000.usb: bus width: 32, oc: digital152 [ 4.181070] isp1760 4f000000.usb: NXP ISP1760 USB Host Controller153 [ 4.181548] isp1760 4f000000.usb: new USB bus registered, assigned bus number 1154 [ 4.182418] isp1760 4f000000.usb: Scratch test failed.155 [ 4.182705] isp1760 4f000000.usb: can't setup: -19156 [ 4.183183] isp1760 4f000000.usb: USB bus 1 deregistered157 [ 4.185634] usbcore: registered new interface driver usb-storage158 [ 4.192487] mousedev: PS/2 mouse device common for all mice159 [ 4.201100] rtc-pl031 10017000.rtc: rtc core: registered pl031 as rtc0160 [ 4.216680] mmci-pl18x 10005000.mmci: Got CD GPIO161 [ 4.216979] mmci-pl18x 10005000.mmci: Got WP GPIO162 [ 4.218707] mmci-pl18x 10005000.mmci: mmc0: PL181 manf 41 rev0 at 0x10005000 irq 34,35 (pio)163 [ 4.272360] ledtrig-cpu: registered to indicate activity on CPUs164 [ 4.279939] usbcore: registered new interface driver usbhid165 [ 4.280124] usbhid: USB HID core driver166 [ 4.321426] input: AT Raw Set 2 keyboard as /devices/platform/smb@04000000/smb@04000000:motherboard/smb@04000000:motherboard:iofpga@7,00000000/10006000.kmi/serio0/input/input0167 [ 4.326835] aaci-pl041 10004000.aaci: ARM AC'97 Interface PL041 rev0 at 0x10004000, irq 33168 [ 4.326992] aaci-pl041 10004000.aaci: FIFO 512 entries169 [ 4.327894] oprofile: using arm/armv7-ca9170 [ 4.331342] NET: Registered protocol family 17171 [ 4.331955] 9pnet: Installing 9P2000 support172 [ 4.332582] Registering SWP/SWPB emulation handler173 [ 4.348427] rtc-pl031 10017000.rtc: setting system clock to 2017-03-20 03:31:48 UTC (1489980708)174 [ 4.349574] ALSA device list:175 [ 4.349669] #0: ARM AC'97 Interface PL041 rev0 at 0x10004000, irq 33176 [ 4.999294] input: ImExPS/2 Generic Explorer Mouse as /devices/platform/smb@04000000/smb@04000000:motherboard/smb@04000000:motherboard:iofpga@7,00000000/10007000.kmi/serio1/input/input2177 [ 5.014045] RAMDISK: gzip image found at block 0178 [ 11.157823] EXT4-fs (ram0): mounted filesystem with ordered data mode. Opts: (null)179 [ 11.158866] VFS: Mounted root (ext4 filesystem) on device 1:0.180 [ 11.189561] Freeing unused kernel memory: 1024K181 [ 12.209586] Generic PHY 4e000000.etherne:01: attached PHY driver [Generic PHY] (mii_bus:phy_addr=4e000000.etherne:01, irq=-1)182 [ 12.236870] smsc911x 4e000000.ethernet eth0: SMSC911x/921x identified at 0xf1420000, IRQ: 31183 Please press Enter to activate this console. 184 [root@vexpress ]# 185 [root@vexpress ]# [ 31.810292] random: fast init done186 [root@vexpress ]# 187 [root@vexpress ]# 188 [root@vexpress ]# python189 Python 2.7.13 (default, Mar 20 2017, 11:20:45) 190 [GCC 4.8.3 20140320 (prerelease)] on linux2191 Type "help", "copyright", "credits" or "license" for more information.192 >>> for i in range(100): print "hello world"193 ... 194 hello world195 hello world196 hello world197 hello world198 hello world199 hello world200 hello world201 hello world202 hello world203 hello world204 hello world205 hello world206 hello world207 hello world208 hello world209 hello world210 hello world211 hello world212 hello world213 hello world214 hello world215 hello world216 hello world217 hello world218 hello world219 hello world220 hello world221 hello world222 hello world223 hello world224 hello world225 hello world226 hello world227 hello world228 hello world229 hello world230 hello world231 hello world232 hello world233 hello world234 hello world235 hello world236 hello world237 hello world238 hello world239 hello world240 hello world241 hello world242 hello world243 hello world244 hello world245 hello world246 hello world247 hello world248 hello world249 hello world250 hello world251 hello world252 hello world253 hello world254 hello world255 hello world256 hello world257 hello world258 hello world259 hello world260 hello world261 hello world262 hello world263 hello world264 hello world265 hello world266 hello world267 hello world268 hello world269 hello world270 hello world271 hello world272 hello world273 hello world274 hello world275 hello world276 hello world277 hello world278 hello world279 hello world280 hello world281 hello world282 hello world283 hello world284 hello world285 hello world286 hello world287 hello world288 hello world289 hello world290 hello world291 hello world292 hello world293 hello world294 >>> [ 236.572628] random: crng init done
完。