kwingmei

摘要： step 1：创建根文件系统目录cd /opt/FriendlyARM/mini6410/linuxmkdir rootfscd rootfsmkdir bin dev etc lib proc sbin sys usr mnt tmp varmkdir usr/bin usr/lib usr/sbin lib/modulesstep2:创建设备文件：cd dev/mknod -m 666 console c 5 1mknod -m 666 null c 1 3cd ..step3：安装/etc(配置文件可以从其他做好的嵌入式系统中cp)tarzxvf etc.tar.gz –C /xxx/r 阅读全文

摘要： Finish And Until 'finish' lets the current function execute until it finishes. 'until makes gdb continue program execution until the given line is reached. Note: 'until' can only be executed if the program alreadyreturn Sometimes we want a function to terminate prematurely during 阅读全文

摘要： The Annoying C-Preprocessor Macrosgcc -gdwarf-2 -g3Breakpoint 1, main () at c_preprocessor_macros.c:1414 int state = STATE_BAD;(gdb) p STATE_BAD$1 = 1(gdb) info macro STATE_BADDefined at /home/choo/work/lin-club/gdb_-_customize_it/gdb_source_examples/c_preprocessor_macros.c:4#define STATE_BAD 1Brea. 阅读全文

摘要： 主要便于调试使用， 如观测某个变量， 或某几个变量的表达式gdb allows creating gdb-scoped variables "on the fly":To see the list of defined convenience variables:To initialize a convenience variable only if it's not yet defined:init-if-undefine $foo=i*2 条件初始化Convenience variables are useful when writing gdb macros 阅读全文

摘要： Making gdb do more (debugging) for less (re-typing)gdb allows us to debug our code primitively. 调试我们的代码Yet, gdb supports a large number of knobs and levers, all of which are quite documented. 也可以说太仔细了， 我们不会去看而已are too lazy to read documentation... ...and even more so, for software we've been usi 阅读全文

摘要： linux 模块/usr/src//Documentation/kbuild/modules.txt 有说明hello.c/* hello.c example minial module code */#include static int __init hello_init(void){ printk( KERN_INFO "Hello !\n" ); return 0;}static void __exit hello_exit(void){ printk( "Bye !\n" ); return ;}module_init(hello_init); 阅读全文

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摘要： Initializing the GTK+ libraries is extremely simple for most applications.By calling gtk_init(),all initialization work is automatically performed for you.It begins by setting up the GTK+ environment,including obtaining the GDK display andpreparing the GLib main event loop and basic signal handling. 阅读全文

摘要： 是参照网上的一些例子start.S.globl _start /*汇编的入口， 生成bin文件的开始处的标识， 把程序加载到某个地址， 用go 命令 go addr， 执行的就是下面的一条指令 */_start: /* peri port setup =Peripheral port setup */ ldr r0,=0x70000000 orr r0, r0, #0x13 mcr p15, 0, r0, c15, c2, 4 /*写处理器的操作 mcr move to coprocessor from register *//*当时很疑惑，不知道这段代码有什么用，经过一番查找，原来和ARM. 阅读全文

摘要： B, Branch,BL, Branch with Link,BX, Branch and exchange instruction set,BLX, Branch with Link and exchange instruction set,BXJ, Branch and change to Jazelle state.jazelle 不知道是什么意思："jazz-ell". an adjective. calling someone a jazelle means that you are literally calling someone a cute asian/a 阅读全文