Compile Linux Kernel Modules
ÎÒÕýÔÚѧϰдlinux device driver for embedded system.
ÎÒÓÐÒ»¸ölinuxǶÈëʽÉ豸£¬Ò²ÓÐÕâ¸öÉ豸µÄlinuxÔ´´úÂë¡£Ò²ÓÐcross compiler tool chain.
µÚÒ»²½£¬¾ÍÊÇдһ¸ö¼òµ¥µÄhelloÄ£¿é£¬È»ºó×°µ½É豸ÖС£ÒÔÑéÖ¤ÎÒÕâ¸ö¿ª·¢»·¾³¡£
ÔÚÍøÉÏËÑË÷ÁËһϣ¬ how to cross compile linux device driver
·¢ÏÖÔÚlinux´úÂë¸ùĿ¼µÄMakefileÖÐÓйØÓÚcross compileµÄÃèÊö
# Cross compiling and selecting different set of gcc/bin-utils
# ---------------------------------------------------------------------------
#
# When performing cross compilation for other architectures ARCH shall be set
# to the target architecture. (See arch/* for the possibilities).
# ARCH can be set during invocation of make:
# make ARCH=ia64
# Another way is to have ARCH set in the environment.
# The default ARCH is the host where make is executed.
# CROSS_COMPILE specify the prefix used for all executables used
# during compilation. Only gcc and related bin-utils executables
# are prefixed with $(CROSS_COMPILE).
# CROSS_COMPILE can be set on the command line
# make CROSS_COMPILE=ia64-linux-
# Alternatively CROSS_COMPILE can be set in the environment.
# Default value for CROSS_COMPILE is not to prefix executables
# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
Ö»ÒªÖ¸¶¨ARCHºÍCROSS_COMPILE¾Í¿ÉÒÔÁË¡£
ÔÚÎÒµÄÕâ¸öMakefileÖУ¬ÒѾָ¶¨ÁËARCH=arm£¬CROSS_COMPILE=arm-linux-
ÒòΪÔÚ±àÒëmoduleµÄʱºò£¬Ê¹ÓõÄÊÇÄں˹¹Ôìϵͳ£¬Ò²¾ÍÊÇʹÓõÄÉÏÃæËù˵µÄÕâ¸öÔÚÄÚºËÔ´Âë¸ùĿ¼µÄMakefile¡£ËùÒÔÎҾͲ»ÐèÒªÔÚÎÒµ÷ÓÃmakeµÄÃüÁîÐÐÖÐÖ¸¶¨ARCHºÍCROSS_COMPILEÁË¡£
ÓÃÀ´²âÊÔµÄhelloÄ£¿éµÄÔ´ÂëÀ´×Ô http://www.cyberciti.biz/tips/compiling-linux-kernel-module.html
hello.c
#include <linux/module.h> /* Needed by all modules */
#include <linux/kernel.h> /* Needed for KERN_INFO */
#include <linux/init.h> /* Needed for the macros */
static int __init hello_start(void)
{
printk(KERN_INFO "Loading hello module...\n");
printk(KERN_INFO "Hello world\n");
return 0;
}
static void
Ïà¹ØÎĵµ£º
ÓÉÓÚ fc3 ÄÚºËĬÈÏ fat32 Îļþϵͳ×Ö·û±àÂëÊÇ ascii£¬Èç¹ûÓÅÅ̵ÄÎļþÃû°üº¬ÖÐÎÄ£¬ÄÇôÔÚת»»Ê±»á³öÎÊÌ⣬ӦÓóÌÐò¾Í»áʧȥÏìÓ¦¡£¾ßÌåµÄ±íÏÖÓжàÖÖ£¬±ÈÈç×ÀÃæ¼ÙËÀ£¬¹Ø»úʱÌáʾÎÞ·¨Ð¶ÔØ·ÖÇøµÈµÈ
½â¾öµÄ°ì·¨ÊÇÔÚ¹ÒÔØÊ±£¬¸ù¾ÝÓïÑÔ»·¾³ locale µÄÖµ£¬Ê¹ÓùÒÔØ²ÎÊý¡£Èç¹ûÊÇ UTF- ......
Ò»¡¢UbootÉÕ¼
1¡¢Á¬½Ójtag¡¢ÍøÏß¡¢´®¿Ú
2¡¢°Ñtftpd32.exe·Åµ½ubootÉÕ¼µÄĿ¼Àï
3¡¢Æô¶¯tftpd32.exe
4¡¢Æô¶¯ttermpro.exe
5¡¢Ë«»÷uboot.bat
6¡¢µÈµ½´°¿Úµ¯³öÀ´
8¡¢ÔÚ´®¿Ú¹¤¾ßÖÐ
1¡¢ Ö´ÐÐprint ÃüÁ²é¿´»·¾³±äÁ¿
2¡¢Ö´ÐÐsetenv serverip ¾ßÌåIP µØÖ·£¬ÅäÖÃtftp server µÄµØÖ·µÈ
3¡¢Ö´ÐÐsetenv loadaddr 8200000 ......
ÏßÐÔ—ÎïÀíµØÖ·µÄת»»£¬¿É½«ÆäÒâÒåÀ©Õ¹ÎªÔÊÐí½«Ò»¸öÏßÐÔµØÖ·±ê¼ÇΪÎÞЧ£¬¶ø²»ÊÇʵ¼ÊµØ²úÉúÒ»¸öÎïÀíµØÖ·¡£ÓÐÁ½ÖÖÇé¿ö¿ÉÄÜʹҳ±»±ê¼ÇΪÎÞЧ£ºÆäÒ»ÊÇÏßÐÔµØÖ·ÊDzÙ×÷ϵͳ²»Ö§³ÖµÄµØÖ·£»Æä¶þÊÇÔÚÐéÄâ´æ´¢Æ÷ϵͳÖУ¬ÏßÐÔµØÖ·¶ÔÓ¦µÄÒ³´æ´¢ÔÚ´ÅÅÌÉÏ£¬¶ø²»ÊÇ´æ´¢ÔÚÎïÀí´æ´¢Æ÷ÖС£ÔÚǰһÖÖÇé¿öÏ£¬³ÌÐòÒò²úÉúÁËÎÞЧµØÖ·¶ø±ØÐë±»Ö ......
Ò»¡¢ÏÂÔØjpeg¿â
¶þ¡¢ÅäÖñàÒ룬Éú³ÉMakefileÎļþ¡£
#./configure --prefix=/usr/arm/arm-linux --exec-prefix=/usr/arm/arm-linux \
--enable-shared --enable-static
×¢Ò⣺prefixÊÇ×îºó°²×°Ê±¿â´æ·ÅµÄÎļþ£¬sharedÊDZàÒë³É¶¯Ì¬¿â£¬staticÊDZàÒë³É¾²Ì¬¿â
Èý¡¢ÐÞ¸ÄÉú³ÉµÄMakefile¡£
ʹÓÃgedit £Í£á£ë£å£æ£é£ì£å
½«CC ......