ÉîÈëÀí½âlinuxÄں˱ʼÇÁù£ºlinuxϵͳµ÷ÓÃ
Ò»°ãÇé¿öÏ£¬½ø³Ì²»ÄÜ´æȡϵͳÄں˵ģ¬Ö»ÓÐϵͳµ÷ÓÃÊÇÒ»¸öÀýÍ⣬ÔÚintel½á¹¹µÄ¼ÆËã»úÖУ¬ÊÇͨ¹ýÖжÏ0x80ʵÏÖµÄ
½ø³Ì¿ÉÒÔ¿ÉÒÔÌøתµ½ÄÚºËÖеÄλÖÃÊÇsystem_call¡£Ôڴ˼ì²éϵͳµ÷Óúţ¬Ëü¸æËßÄں˽ø³ÌÇëÇóºÎÖÖ·þÎñ£¬È»ºó²éÕÒϵͳµ÷Óñísys_call_table£¬ÕÒµ½Ï£Íûµ÷ÓõÄÄں˵ØÖ·º¯Êý£¬µ÷Óô˺¯Êý£¬È»ºó·µ»Ø¡£
1¡¢ ºê¶¨Òå(unistd.h)
_syscallN(type,name,x…)£¬NÊÇϵͳµ÷ÓÃËùÐè²ÎÊýÊýÄ¿£¬typeÊÇ·µ»ØÀàÐÍ,nameÊÇÃæÏòÓû§µÄϵͳµ÷Óú¯ÊýÃû,x…ÊDzÎÊý£¬¸öÊýΪN
È磺#define _syscall1(type,name,type1,arg1) \
type name(type1 arg1) \
{ \
long __res; \
__asm__ volatile ("push %%ebx ; movl %2,%%ebx ; int $0x80 ; pop %%ebx" \
: "=a" (__res) \
: "0" (__NR_##name),"ri" ((long)(arg1)) : "memory"); \
__syscall_return(type,__res); \
}
·ÖÎö£º
ouput£º _res 0% __NR##name “=a”±íʾ´æ·ÅÔÚeax¼Ä´æÆ÷
Ò²¾ÍÊDZíʾ°Ñ±äÁ¿_res´æ·ÅÔÚeaxÖУ¬“0”±íʾ°Ñ_NR##name¹ØÁªµ½0%¼´_res£®·µ»ØÖµÒ²´æ·ÅÔÚeaxÖУ®
#define _syscall2(type,name,type1,arg1,type2,arg2) \
type name(type1 arg1,type2 arg2) \
{ \
long __res; \
__asm__ volatile ("push %%ebx ; movl %2,%%ebx ; int $0x80 ; pop %%ebx" \
: "=a" (__res) \
: "0" (__NR_##name),"ri" ((long)(arg1)),"c" ((long)(arg2)) \
: "memory"); \
__syscall_return(type,__res); \
}
ͬÀí¿ÉÒÔÖªµÀarg1´æ·ÅÔÚeaxÖУ¬arg2´æ·ÅÔÚebxÖÐ
µ±ÎÒÃÇÔÚ³ÌÐòÖÐÓõ½ÏµÍ³µ÷ÓÃʱ£¬¶ÔÓÚlinuxÔ¤¶¨ÒåµÄϵͳµ÷Ó㬱àÒëÆ÷»áÔÚÔ¤´¦Àíʱ×Ô¶¯¼ÓÈëºê_syscallN()²¢½«ÆäÕ¹¿ª£¬¶ÔÓÚ×Ô¼ºÌí¼ÓµÄϵͳµ÷Óã¬ÐèÒªÔÚ³ÌÐòÖÐÏÔʾµØµ÷Óúê_syscallN£®
2 ϵͳµ÷ÓÃÈë¿Úº¯Êý
ÔÚ_syscallN()ÖÐÖ´ÐÐÁËint 0x80ºó£¬³ÌÐò½øÈëÄÚºË̬£¬ÎÒÃÇÔÚÏÝÚåÃźÍϵͳÃŵijõʼ»¯Àï×öÁËÈçÏÂÉèÖÃ
set_system_gate(SYSCALL_VECTOR,&system_call);
³ÌÐòÌøµ½system_call£¨entry.s£©´¦
ENTRY(system_call)
&nb
Ïà¹ØÎĵµ£º
£¨L2CAPÐÒé¼ò½é£¬L2CAPÔÚBlueZÖеÄʵÏÖÒÔ¼°L2CAP±à³Ì½Ó¿Ú£©
Ò»£ºL2CAPÐÒé¼ò½é£º
Logical Link Control and Adaptation Protocol(L2CAP)
Âß¼Á¬½Ó¿ØÖƺÍÊÊÅäÐÒé (L2CAP) ΪÉϲãÐÒéÌṩÃæÏòÁ¬½ÓºÍÎÞÁ¬½ÓµÄÊý¾Ý·þÎñ£¬²¢Ìṩ¶àÐÒ鹦ÄܺͷָîÖØ×é²Ù×÷¡£L2CAP ³äÐíÉϲãÐÒéºÍÓ¦ÓÃÈí¼þ´«ÊäºÍ½ÓÊÕ×î´ó³¤¶ÈΪ 64K µÄ L2CAP Ê ......
ʲôҲ²»ÒªËµ£¬ÏÈÀ´Ò»¸ö³ÌÐò°É¡£
/*
×¢ÒâÒªºÍÄãµÄϵͳһÖÂredhatÊÇÕâÑù/etc/pam.d/check_user
auth required /lib/security/pam_unix_auth.so
account required /lib/security/pam_unix_acct.so
1.Èç¹ûÐèÒª³öÏÖÃÜÂ뵯³ö¿ò»¹ÐèÒªÔÚÌí¼Ó
/etc/security/console.apps/check_user
USER=root
PROGRAM=~/check_use ......
×·¸ù¾¿µ× http://blog.csdn.net/cataol/ cataol@hotmail.com »¶ÓתÔØ£¬µ«Çë±£Áô×÷ÕßÐÅÏ¢ ÕâÁ½ÌìÔÚѧϰLinuxÇý¶¯Ïà¹ØµÄ×ÊÁÏ£¬ÔÚÕâÀï×öÒ»ÏÂѧϰ±Ê¼Ç£¬ÒÔ±ãÒÔºó²éѯ¡£ÒÔÇ°Ò²ÓÐ×ö¹ý¹¤×÷·½ÃæµÄ֪ʶÕûÀí£¬¿ÉϧÔÚÓ²ÅÌÀïÁãÁãɢɢ£¬ÉõÖÁÓÐЩ¶¼±»É¾µôÁË£¬°¦¡£ & ......
linux ¹ÒÔØÃüÁî : Mount
http://www.zhiweinet.com/jiaocheng/2009-02/2602.htm
mount¹ÒÔØÃüÁîʹÓ÷½·¨:
mount -t ÀàÐÍ -o ¹Ò½Ó·½Ê½ Ô´ Ä¿±ê
-t ÏêϸѡÏî
¡¡¡¡¹âÅÌ»ò¹âÅ̾µÏñ£ºiso9660
DOS fat16Îļþϵͳ£ºmsdos
¡¡¡¡Windows 9x fat32Îļþϵͳ£ºvfat
¡¡¡¡Windows NT ntfsÎļþϵͳ£ºn ......
LinuxʵÑ鱨¸æ3
ÎÒµÄ×÷Òµ 2009 11-10
ʵÑ飺VI±à¼Æ÷
ÐÕ Ãû
ÕÅ¿
ʵÑéµØµã
A605
ʵÑéʱ¼ä
2009 11ÔÂ10 ÐÇÆÚ¶þ
Ò»¡¢ÊµÑéÄ¿µÄ
ÒªÇó£ºÔËÓñà¼Æ÷ÊìÁ·ÕÆÎÕÎı¾±à¼µÄÃüÁî
&nbs ......