linuxÖÐELF¼ÓÔØ¹ý³Ì·ÖÎö
sys_execve
| - do_execve
|
| - search_binary_handler
|- linux_binfmt= elf_format
|- elf_format-> load_elf_binary
| - elf_entry = load_elf_interp()
|-
| if (BAD_ADDR(elf_entry))
| force_sig(SIGSEGV, current);
| retval =-EINVAL;
binfmt_elf.c: line 1024
elf_entry = loc->elf_ex.e_entry;
if (BAD_ADDR(elf_entry)) {
force_sig(SIGSEGV, current);
retval = -EINVAL;
goto out_free_dentry;
}
ELF¿ÉÐеµµÄÔØÈ룺
ÄÚºËÖÐʵ¼ÊÖ´ÐÐ
execv()
»ò
execve()
ϵͳµ÷ÓõijÌÐòÊÇ
do_execve()
£¬Õâ¸öº¯ÊýÏÈ´ò¿ªÄ¿±êÓ³ÏñÎļþ£¬²¢´ÓÄ¿±êÎļþµÄÍ·²¿
(
´ÓµÚÒ»¸ö×Ö½Ú¿ªÊ¼
)
¶ÁÈëÈô¸É
(128)
×Ö½Ú£¬È»ºóµ÷ÓÃÁíÒ»¸öº¯Êý
search_binary_handler()
£¬ÔÚÄÇÀïÃæÈø÷ÖÖ¿ÉÖ´ÐгÌÐòµÄ´¦Àí³ÌÐòǰÀ´ÈÏÁìºÍ´¦Àí¡£ÄÚºËËùÖ§³ÖµÄÿÖÖ¿ÉÖ´ÐгÌÐò¶¼Óиö
struct linux_binfmt
Êý¾Ý½á¹¹£¬Í¨¹ýÏòÄں˵ǼǹÒÈëÒ»¸ö¶ÓÁС£¶ø
search_binary_handler()
£¬ÔòɨÃèÕâ¸ö¶ÓÁУ¬Èø÷¸öÊý¾Ý½á¹¹ËùÌṩµÄ´¦Àí³ÌÐò¡¢¼´¸÷ÖÖÓ³Ïñ¸ñʽ¡¢ÖðһǰÀ´ÈÏÁì¡£Èç¹ûij¸ö¸ñʽµÄ´¦Àí³ÌÐò·¢ÏÖÌØÕ÷Ïà·û¶ø£¬±ãÖ´ÐиøñʽӳÏñµÄ×°ÈëºÍÆô¶¯¡£
ÎÒÃÇ´Ó
ELF
¸ñʽӳÏñµÄ
Ïà¹ØÎĵµ£º
1¡¢¼òµ¥²âÊÔʵÀý
for i in `find . -type f -name "*.c"`
do
echo $i
basename $i »ñÈ¡*.cÎļþÃû
dirname $i »ñÈ¡*.c¶ÔÓ¦µÄĿ¼Ãû
done
2¡¢Êµ¼ÊÓ¦ÓÃ
diff LinuxÔ´Â룬²¢½«Óв»Ò»ÑùµÄÔ´ÂëÕûÀíÔÚÒ»Æð£¬ÒªÇó£ºÎļþ ......
×÷Õߣº·ëÀÚ (flw10000) MAIL£ºflw10000 AT 163.com
¾¹ý½üÒ»ÖܵÄæºõ£¬°Ñ»ùÓÚlinuxµÄMIPS½»²æ±àÒë»·¾³»ù±¾´î½¨³É¹¦£¬ÕâÀï˵"»ù±¾"´î½¨³É¹¦ÊÇÒòΪ»·¾³ËäÈ»´î½¨ºÃÁË£¬¿ÉÒÔ±àÒë»ùÓڣͣɣУӵĿÉÖ´ÐÐÎļþÁË£¬µ«»¹Ã»ÓÐÔÚÕæÕýµÄ£Í£É£Ð£Ó»·¾³Ï²âÊÔ¹ý£¬»¹ÓÐÔÚ±àÒëµÄ¹ý³ÌÖгöÏÖÁËЩÎÊÌ⣬ËäÈ»½â¾öÁË£¬Ò²ÒòûÓÐÔÚÕæÕýµÄ£Í£É£ ......
ÔÚLinuxÏÂÓÃbuildroot´î½¨mips/armµÄ½»²æ±àÒëÆ½Ì¨
Õâ¸ö±àÒë»·¾³ÊDz»ÄܱàÒëfor¿ªÔ´ÎÞÏß·ÓÉÆ÷µÄ³ÌÐòµÄ£¬ÒòΪÄÚºËÊÇ2.6µÄ
½¨Òé²Î¿¼ÕâÆª: http://www.felix021.com/blog/read.php?1467
ǰÁ½ÌìÂòÁËNetGear WRT614 V9£¬´îÔØµÄÊÇBroadcomµÄ200MHz MIPS´¦ÀíÆ÷¡£
ÓÉÓÚʹÓõÄÊÇ¿ªÔ´²Ù×÷ϵͳLinux£¬ËùÒÔ¿ÉÒÔË¢ÍøÉÏһЩNBµÄ ......
¼¶±ð£º ³õ¼¶
ФÎÄÅô
(xiaowp@263.net
), ˶ʿÑо¿Éú, ±±¾©Àí¹¤´óѧ¼ÆËã»úϵ
2004 Äê 2 ÔÂ 01 ÈÕ
Á÷
ýÌåÖ¸µÄÊÇÔÚÍøÂçÖÐʹÓÃÁ÷¼¼Êõ´«ÊäµÄÁ¬ÐøÊ±»ùýÌ壬ÆäÌØµãÊÇÔÚ²¥·Åǰ²»ÐèÒªÏÂÔØÕû¸öÎļþ£¬¶øÊDzÉÓñßÏÂÔØ±ß²¥·ÅµÄ·½Ê½£¬ËüÊÇÊÓÆµ»áÒé¡¢IPµç»°µÈÓ¦Óó¡ºÏ
µÄ¼¼Êõ»ù´¡¡£RTPÊǽøÐÐʵʱÁ÷ýÌå´«ÊäµÄ±ê×¼ÐÒéº ......
ShellÊÇϵͳµÄÓû§½çÃæ£¬ÌṩÁËÓû§ÓëÄں˽øÐн»»¥²Ù×÷µÄÒ»ÖÖ½Ó¿Ú¡£Ëü½ÓÊÕÓû§ÊäÈëµÄÃüÁî²¢°ÑËüËÍÈëÄÚºËÈ¥Ö´ÐС£
¡¡¡¡Êµ¼ÊÉÏShellÊÇÒ»¸öÃüÁî½âÊÍÆ÷£¬Ëü½âÊÍÓÉÓû§ÊäÈëµÄÃüÁî²¢ÇÒ°ÑËüÃÇË͵½Äںˡ£²»½öÈç´Ë£¬ShellÓÐ×Ô¼ºµÄ±à³ÌÓïÑÔÓÃÓÚ¶ÔÃüÁîµÄ±à¼£¬ËüÔÊÐíÓû§±àдÓÉshellÃüÁî×é³ÉµÄ³ÌÐò¡£Shell±à³ÌÓïÑÔ¾ßÓÐÆÕͨ±à³ÌÓ ......