Ò׽ؽØÍ¼Èí¼þ¡¢µ¥Îļþ¡¢Ãâ°²×°¡¢´¿ÂÌÉ«¡¢½ö160KB

ARM Linux bootloader Æô¶¯¹ý³Ì

 1. Òý ÑÔ
Linux ×î³õÊÇÓÉÈðµäºÕ¶ûÐÁ»ù´óѧµÄѧÉú Linus TorvaldsÔÚ1991 Ä꿪·¢³öÀ´µÄ£¬Ö®ºóÔÚ
GNUµÄÖ§³ÖÏ£¬Linux »ñµÃÁ˾޴óµÄ·¢Õ¹¡£ËäÈ» Linux ÔÚ×ÀÃæ PC »úÉÏµÄÆÕ¼°³Ì¶ÈÔ¶²»¼°Î¢
ÈíµÄ Windows ²Ù×÷ϵͳ£¬µ«ËüµÄ·¢Õ¹ËÙ¶ÈÖ®¿ì¡¢Óû§ÊýÁ¿µÄÈÕÒæÔö¶à£¬Ò²ÊÇ΢ÈíËù²»ÄÜÇá
Êӵġ£¶ø½üЩÄêÀ´ Linux ÔÚǶÈëʽÁìÓòµÄѸÃÍ·¢Õ¹£¬¸üÊǸø Linux ×¢ÈëÁËеĻîÁ¦¡£
Ò»¸öǶÈëʽ Linux ϵͳ´ÓÈí¼þ½Ç¶È¿´¿ÉÒÔ·ÖΪËĸö²¿·Ö£º
Òýµ¼¼ÓÔØ³ÌÐò£¨bootloader£©£¬Linux Äںˣ¬Îļþϵͳ£¬Ó¦ÓóÌÐò¡£
ÆäÖÐ bootloaderÊÇϵͳÆô¶¯»ò¸´Î»ÒÔºóÖ´ÐеĵÚÒ»¶Î´úÂ룬ËüÖ÷ÒªÓÃÀ´³õʼ»¯´¦ÀíÆ÷¼°
ÍâÉ裬Ȼºóµ÷Óà Linux Äںˡ£Linux ÄÚºËÔÚÍê³ÉϵͳµÄ³õʼ»¯Ö®ºóÐèÒª¹ÒÔØÄ³¸öÎļþϵͳ×ö
Ϊ¸ùÎļþϵͳ£¨Root Filesystem£©¡£¸ùÎļþϵͳÊÇ Linux ϵͳµÄºËÐÄ×é³É²¿·Ö£¬Ëü¿ÉÒÔ×öΪLinux ϵͳÖÐÎļþºÍÊý¾ÝµÄ´æ´¢ÇøÓò£¬Í¨³£Ëü»¹°üÀ¨ÏµÍ³ÅäÖÃÎļþºÍÔËÐÐÓ¦ÓÃÈí¼þËùÐèÒªµÄ
¿â¡£Ó¦ÓóÌÐò¿ÉÒÔ˵ÊÇǶÈëʽϵͳµÄ“Áé»ê”£¬ËüËùʵÏֵŦÄÜͨ³£¾ÍÊÇÉè¼Æ¸ÃǶÈëʽϵͳ
ËùÒª´ïµ½µÄÄ¿±ê¡£Èç¹ûûÓÐÓ¦ÓóÌÐòµÄÖ§³Ö£¬ÈκÎÓ²¼þÉÏÉè¼Æ¾«Á¼µÄǶÈëʽϵͳ¶¼Ã»ÓÐʵÓÃ
ÒâÒå¡£
´ÓÒÔÉÏ·ÖÎöÎÒÃÇ¿ÉÒÔ¿´³ö bootloader ºÍ Linux ÄÚºËÔÚǶÈëʽϵͳÖеĹØÏµºÍ×÷Óá£
BootloaderÔÚÔËÐйý³ÌÖÐËäÈ»¾ßÓгõʼ»¯ÏµÍ³ºÍÖ´ÐÐÓû§ÊäÈëµÄÃüÁîµÈ×÷Ó㬵«Ëü×î¸ù±¾µÄ
¹¦ÄܾÍÊÇΪÁËÆô¶¯ Linux Äںˡ£ÔÚǶÈëʽϵͳ¿ª·¢µÄ¹ý³ÌÖУ¬ºÜ´óÒ»²¿·Ö¾«Á¦¶¼ÊÇ»¨ÔÚ
bootloader ºÍ Linux Äں˵Ŀª·¢»òÒÆÖ²ÉÏ¡£Èç¹ûÄÜÇå³þµÄÁ˽â bootloader Ö´ÐÐÁ÷³ÌºÍ LinuxµÄÆô¶¯¹ý³Ì£¬½«ÓÐÖúÓÚÃ÷È·¿ª·¢¹ý³ÌÖÐËùÐèµÄ¹¤×÷£¬´Ó¶ø¼ÓËÙǶÈëʽϵͳµÄ¿ª·¢¹ý³Ì¡£¶øÕâÕýÊDZ¾ÎĵÄËùÒªÑо¿µÄÄÚÈÝ¡£
2. Bootloader
2.1 BootloaderµÄ¸ÅÄîºÍ×÷ÓÃ
BootloaderÊÇǶÈëʽϵͳµÄÒýµ¼¼ÓÔØ³ÌÐò£¬ËüÊÇϵͳÉϵçºóÔËÐеĵÚÒ»¶Î³ÌÐò£¬Æä×÷ÓÃ
ÀàËÆÓÚ PC »úÉ쵀 BIOS¡£ÔÚÍê³É¶ÔϵͳµÄ³õʼ»¯ÈÎÎñÖ®ºó£¬Ëü»á½«·ÇÒ×ʧÐÔ´æ´¢Æ÷£¨Í¨³£
ÊÇ Flash»ò DOC µÈ£©ÖеÄLinux Äں˿½±´µ½ RAM ÖÐÈ¥£¬È»ºóÌø×ªµ½Äں˵ĵÚÒ»ÌõÖ¸Áî´¦¼ÌÐøÖ´ÐУ¬´Ó¶øÆô¶¯ Linux Äںˡ£
Óɴ˿ɼû£¬bootloader ºÍ Linux ÄÚºËÓÐ×ÅÃܲ»¿É·ÖµÄÁªÏµ£¬ÒªÏëÇå³þµÄÁ˽â LinuxÄÚºË
µÄÆô¶¯¹ý³Ì£¬ÎÒÃDZØÐëÏȵÃÈÏʶ bootloaderµÄÖ´Ðйý³Ì£¬ÕâÑù²ÅÄܶÔǶÈëʽϵͳµÄÕû¸öÆô¶¯
¹ý³ÌÓÐÇåÎúµÄÕÆÎÕ¡£
2.2 BootloaderµÄÖ´Ðйý³Ì
²»Í¬µÄ´¦ÀíÆ÷Éϵç»ò¸´Î»ºóÖ´ÐеĵÚÒ»ÌõÖ¸ÁîµØÖ·²¢²»Ïàͬ£¬¶ÔÓÚ ARM ´¦ÀíÆ÷À´Ëµ£¬
¸ÃµØÖ·Îª 0x


Ïà¹ØÎĵµ£º

ʵսLinux Bluetooth±à³Ì£¨ËÄ£© L2CAP²ã±à³Ì

£¨L2CAPЭÒé¼ò½é£¬L2CAPÔÚBlueZÖеÄʵÏÖÒÔ¼°L2CAP±à³Ì½Ó¿Ú£©
Ò»£ºL2CAPЭÒé¼ò½é£º
Logical Link Control and Adaptation Protocol(L2CAP)
Âß¼­Á¬½Ó¿ØÖƺÍÊÊÅäЭÒé (L2CAP) ΪÉϲãЭÒéÌá¹©ÃæÏòÁ¬½ÓºÍÎÞÁ¬½ÓµÄÊý¾Ý·þÎñ£¬²¢Ìṩ¶àЭÒ鹦ÄܺͷָîÖØ×é²Ù×÷¡£L2CAP ³äÐíÉϲãЭÒéºÍÓ¦ÓÃÈí¼þ´«ÊäºÍ½ÓÊÕ×î´ó³¤¶ÈΪ 64K µÄ L2CAP Ê ......

ʵսLinux Bluetooth±à³Ì(Áù) L2CAP±à³ÌʵÀý

ÀýÒ»£º·¢ËÍSignaling Packet£º
Signaling CommandÊÇ2¸öBluetoothʵÌåÖ®¼äµÄL2CAP²ãÃüÁî´«Êä¡£ËùÒÔµÃSignaling CommandʹÓÃCID 0x0001.
¶à¸öCommand¿ÉÒÔÔÚÒ»¸öC-frame£¨control frame£©Öз¢ËÍ¡£
 Èç¹ûÒªÖ±½Ó·¢ËÍSignaling Command.ÐèÒª½¨Á¢SOCK_RAWÀàÐ͵ÄL2CAPÁ¬½ÓSocket¡£ÕâÑù²ÅÓлú»á×Ô¼ºÌî³äCommand Code£¬Identi ......

Linux Ðźż¯ dzÎö

  LinuxÐźÅÓжàÖÖ˵·¨¡£Ò»¸ö½ø³Ì´´½¨Ò»¸öÐźÅÓÃÓÚ·¢Ë͸øÁíÍâÒ»¸ö½ø³Ì½Ð×ö·¢ËÍÒ»¸öÐźţ¬Äں˴´½¨Ò»¸öÐźŽÐ×öÉú³ÉÒ»¸öÐźţ¬½ø³Ì×Ô¼ºÏò×Ô¼º·¢ËÍÐźŽÐ×ö»½ÆðÒ»¸öÐźš£²»¹ýÎÒ¿´Ò²Ã»±ØÒªÕâôѧ¾¿Æø¡£
  Ðźż¯--signel set,Æäʵ¾ÍÊǽ«¶à¸öÐźŷÅÔÚ¼¯ºÏÖнøÐм¯ÖеĴ¦Àí¡£POSIX.1¶¨ÒåÁËsigset_tÒÔ°üº­Ò»¸öÐźż¯£ ......

linux·þÎñÆ÷ÅäÖÃ

 vsftp·þÎñÆ÷£º
ÔÚ/etc/vsftpdĿ¼Ï¹²ÓÐ3¸öÅäÖÃÎļþ£¬ËüÃÇ·Ö±ðÊÇ£º
ftpusers:ËüÖ¸¶¨ÁËÄÄЩÓû§ÕË»§²»ÄÜ·ÃÎÊFTP·þÎñÆ÷£¬ÀýÈçrootµÈ¡£
user_list:¸ÃÎļþÀïµÄÓû§ÕË»§ÔÚĬÈÏÇé¿öÏÂÒ²²»ÄÜ·ÃÎÊFTP·þÎñÆ÷£¬½öµ±vsftpd .confÅäÖÃÎļþÀïÆôÓÃuserlist_enable=NOÑ¡Ïîʱ²ÅÔÊÐí·ÃÎÊ¡£
vsftpd.conf:ËüÊÇÒ»¸öÎı¾Îļþ£¬ÎÒÃÇ¿ ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ