LinuxÖеĵØÖ·¿Õ¼ä
LinuxÖеĵØÖ·¿Õ¼ä
ÓÐÕâôһϵÁеÄÎÊÌ⣬ÊÇ·ñÔÚÀ§ÈÅ×ÅÄ㣺Óû§³ÌÐò±àÒëÁ¬½ÓÐγɵĵØÖ·¿Õ¼äÔÚʲô·¶Î§ÄÚ£¿Äں˱àÒëºóµØÖ·¿Õ¼äÔÚʲô·¶Î§ÄÚ£¿Òª¶ÔÍâÉè½øÐзÃÎÊ£¬I/OµÄµØÖ·¿Õ¼äÓÖÊÇʲôÑùµÄ£¿
ÏȻشðµÚÒ»¸öÎÊÌâ¡£Linux×î³£¼ûµÄ¿ÉÖ´ÐÐÎļþ¸ñʽΪelf(Executable and Linkable Format)¡£ÔÚelf¸ñʽµÄ¿ÉÖ´ÐдúÂëÖУ¬ld×ÜÊÇ´Ó0x8000000¿ªÊ¼°²ÅųÌÐòµÄ“´úÂë¶Î”£¬¶Ôÿ¸ö³ÌÐò¶¼ÊÇÕâÑù¡£ÖÁÓÚ³ÌÐòÖ´ÐÐʱÔÚÎïÀíÄÚ´æÖеÄʵ¼ÊµØÖ·£¬ÔòÓÉÄÚºËΪÆ佨Á¢ÄÚ´æÓ³ÉäʱÁÙʱ·ÖÅ䣬¾ßÌåµØÖ·È¡¾öÓÚµ±Ê±Ëù·ÖÅäµÄÎïÀíÄÚ´æÒ³Ãæ¡£
ÎÒÃÇ¿ÉÒÔÓÃLinuxµÄʵÓóÌÐòobjdump¶ÔÄãµÄ³ÌÐò½øÐз´»ã±à£¬´Ó¶øÖªÏþÆäµØÖ··¶Î§¡£
ÀýÈ磺¼Ù¶¨ÎÒÃÇÓÐÒ»¸ö¼òµ¥µÄC³ÌÐòHello.c
# include
greeting ( )
{
printf(“Hello,world!\n”);
}
main()
{
greeting();
}
Ö®ËùÒÔ°ÑÕâÑù¼òµ¥µÄ³ÌÐòд³ÉÁ½¸öº¯Êý£¬ÊÇΪÁË˵Ã÷Ö¸ÁîµÄתÒƹý³Ì¡£ÎÒÃÇÓÃgccºÍld¶ÔÆä½øÐбàÒëºÍÁ¬½Ó£¬µÃµ½¿ÉÖ´ÐдúÂëhello¡£È»ºó£¬ÓÃLinuxµÄʵÓóÌÐòobjdump¶ÔÆä½øÐз´»ã±à£º
$objdump –d hello
µÃµ½µÄÖ÷ҪƬ¶ÎΪ£º
08048568 :
8048568: pushl %ebp
8048569: movl %esp, %ebp
804856b: pushl $0x809404
8048570: call 8048474 <_init+0x84>
8048575: addl $0x4, %esp
8048578: leave
8048579: ret
804857a: movl %esi, %esi
0804857c :
804857c: pushl %ebp
804857d: movl %esp, %ebp
804857f: call 8048568&n
Ïà¹ØÎĵµ£º
Service Discovery Protocol(SDP)ÌṩһÖÖÄÜÁ¦£¬ÈÃÓ¦ÓóÌÐòÓз½·¨·¢ÏÖÄÄÖÖ·þÎñ¿ÉÓÃÒÔ¼°ÕâÖÖ·þÎñµÄÌØÐÔ¡£
·þÎñ·¢ÏÖÐÒé(SDP»òBluetooth SDP)ÔÚÀ¶ÑÀÐÒéÕ»ÖжÔÀ¶ÑÀ»·¾³ÖеÄÓ¦ÓóÌÐòÓÐÌØÊâµÄº¬Ò⣬·¢ÏÖÄĸö·þÎñÊÇ¿ÉÓõĺÍÈ·¶¨ÕâЩ¿ÉÓ÷þÎñµÄÌØÕ÷¡£SDP¶¨ÒåÁËbluetooth client·¢ÏÖ¿ÉÓÃbluetooth server·þÎñºÍËüÃǵÄÌØÕ÷µÄ·½·¨¡£ ......
Ò»£ºÇ°ÑÔ
×î½üÔÚÑо¿androidµÄsensor driver£¬Ö÷ÒªÊÇE-compass£¬ÆäÖÐÓõ½ÁËLinux input×Óϵͳ.ÔÚÍøÉÏÒ²¿´Á˺ܶàÕâ·½ÃæµÄ×ÊÁÏ£¬¸Ð¾õ»¹ÊÇÕâƪ·ÖÎöµÄ±È½ÏϸÖÂ͸³¹£¬Òò´ËתÔØÒ»ÏÂÒÔ±ã×Ô¼ºÑ§Ï°£¬Í¬Ê±ºÍ´ó¼Ò·ÖÏí£¡
£¨Õâƪ²©¿ÍÖ÷ÒªÊÇÒÔ¼üÅÌÇý¶¯ÎªÀýµÄ£¬²»¹ý½²½âµÄÊÇLinux Input Subsystem£¬¿ÉÒÔ×ÐϸµÄÑо¿Ò»Ï£¡£©
¼üÅÌÇý¶¯½«¼ì ......
<!--
@page { margin: 2cm }
P { margin-bottom: 0.21cm }
A:link { so-language: zxx }
-->
Ê®ÄêÒÔÀ´£¬È«Çò
Linux
½çÓÐÄÄЩÖØÒª½øÕ¹£¬ÈËÃÇÓ¦¸ÃÖªµÀ£¿¶Ô´Ë£¬ÈËÃÇ¿ÉÒÔÓв»Í¬µÄ¿´·¨£¬µ«ÊÇ£¬´ó¼Ò×ܵÃÓиö´óÖÂÏàͬµÄÈÏʶ¡£Êµ¼ÊÇé¿öÔõÑùÄØ£¿
......
7.1.1 Linux·ÖÇø¼ò½é
Ëùν·ÖÇø£¬¾ÍÊÇ´ÅÅÌÉϽ¨Á¢µÄÓÃÓÚ´æ´¢Êý¾ÝºÍÎļþµÄµ¥¶ÀÇøÓò²¿·Ö¡£´ÅÅÌ·ÖÇø¿ÉÒÔ·ÖΪÖ÷·ÖÇøºÍÀ©³ä·ÖÇø£¬ÆäÖÐÖ÷·ÖÇø¾ÍÊÇ°üº¬²Ù×÷ϵͳÆô¶¯Ëù±ØÐëµÄÎļþºÍÊý¾ÝµÄ´ÅÅÌ·ÖÇø£»À©³ä·ÖÇøÒ»°ãÓÃÀ´´æ·ÅÊý¾ÝºÍÓ¦ÓóÌÐòÎļþ¡£Ò»¸ö´ÅÅÌ×î¶à¿É·ÖΪ4¸ö·ÖÇø£¬×î¶à¿ÉÒÔÓÐ4¸öÖ÷·ÖÇø£¬¼´È«²¿·ÖÇø¶¼±»»®·ÖΪÖ÷·ÖÇø¡£Èç¹ ......
×÷ÕߣºÍõÕÑÒø
---- SCO
UnixϵͳÒòÆäÎȶ¨¿É¿¿µÄÌص㣬ÔÚ½ðÈÚ¡¢±£ÏÕµÈÐÐÒµµÃµ½¹ã·ºÓ¦Ó㬵«ËûµÄ°²×°ºÍά»¤¶ÔÓÚרҵ¼¼ÊõÈËÔ±Ò²²»ÊÇÒ»¼þÇáËɵÄÊ¡£±ÊÕßËùά»¤µÄϵͳ°²×°ÓÐSCO
Unix²Ù×÷ϵͳ¡¢InformixÊý¾Ý¿âÁ¬Í¬Ó¦ÓÃÈí¼þ£¬°²×°ºó»¹Òªµ÷ÕûºËÐIJÎÊý¡¢°²×°É豸Á¬Í¬Á´½ÓºËÐĵȣ¬°²×°Ò»Ì×ÍêÕûµÄϵͳÐ軨·ÑÊýСʱ¡£ËùÒÔ£¬¼ÙÈç
ÖÆ ......