[B! gdb] kanbayashiã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯

kanbayashi id:kanbayashi

gdbã«é–¢ã™ã‚‹kanbayashiã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯ (15)

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Electric Fenceã‚’ä½¿ã£ã¦ã¿ã‚‹
$Id: howto-efence.html,v 1.1 2000/07/05 13:43:38 sakane Exp $ %Hd: Electric Fenceã‚’ä½¿ã£ã¦ã¿ã‚‹ ä½•ï¼Ÿ ç’°å¢ƒå¤‰æ•° ãƒžãƒ‹ãƒ¥ã‚¢ãƒ«ã§æŽ¨å¥¨ã•ã‚Œã¦ã„ã‚‹ä½¿ã„æ–¹ ãã®ä»– o ä½•ï¼Ÿ è‡ªåˆ†ã®æŠ€è¡“åŠ›ã‚’è¶ŠãˆãŸãƒ—ãƒã‚°ãƒ©ãƒ æ›¸ãæ™‚ã«è¶…ä¾¿åˆ©ãªãƒ„ãƒ¼ãƒ«ã€‚ ã§ãã‚‹äº‹ o ãƒãƒƒãƒ•ã‚¡ãƒ»ã‚ªãƒ¼ãƒãƒ¼ãƒ©ãƒ³ o ãƒãƒƒãƒ•ã‚¡ãƒ»ã‚¢ãƒ³ãƒ€ãƒ¼ãƒ©ãƒ³ o é–‹æ”¾ã—ãŸé ˜åŸŸã‚’è§¦ã‚‹ o ã‚µã‚¤ã‚º 0ã® malloc ã‚’è¦‹ã¤ã‘ã‚‹ã“ã¨ãŒã§ãã‚‹ã€‚ ã‚³ãƒ³ãƒ‘ã‚¤ãƒ«æ™‚ã« libefence.a ã‚’ãƒªãƒ³ã‚¯ã™ã‚‹äº‹ã§ malloc(3)ã‚„ free(3)ã‚’ç½®ãæ›ãˆã‚‹ã€‚ æ¬ ç‚¹ã¯ o æ¿€ã—ããƒ¡ãƒ¢ãƒªã‚’ä½¿ã†ã€‚ o ãƒ—ãƒã‚°ãƒ©ãƒ å‹•ä½œãŒç•°å¸¸ã«é…ããªã‚‹ã€‚ ä½•ã¯ã¨ã‚‚ã‚ã‚Œä½¿ã£ã¦ã¿ã‚‹ã€‚ #include #include #include int main() { char *c; c = malloc(4); c[3]
kanbayashi 2008/06/18
ãƒãƒƒãƒ•ã‚¡ã‚ªãƒ¼ãƒãƒ¼ãƒ©ãƒ³ã¨ã‹ã‚’è¦‹ã¤ã‘ã‚‰ã‚Œã¾ã™

hackhack

memory

overflow

gcc

gdb

*technique

*tips
ãƒªãƒ³ã‚¯
gcc ã®ãƒ‡ãƒãƒƒã‚°è¡“
Unixç³»ã‚³ãƒžãƒ³ãƒ‰ãƒ©ã‚¤ãƒ³ãƒ¦ãƒ¼ã‚¶ãƒ¼ã®ãŸã‚ã®ã€ gcc/g++/g77 ã«ã‚ˆã‚‹é–‹ç™ºã«ãŠã‘ã‚‹ãƒ‡ãƒãƒƒã‚°è¡“ã‚’ç°¡å˜ã«ç´¹ä»‹ã—ã¾ã™ã€‚ ä»¥ä¸‹ã®å†…å®¹ã¯ gcc 2.7.2.3 ã§ã®å‹•ä½œã¯ç¢ºèªã—ã¦ã„ã¾ã™ã€‚ g++/g77 ã§ã‚‚æã‚‰ãã¯é€šç”¨ã™ã‚‹ã¨æ€ã†ã®ã§ã™ãŒã€ ã²ã‚‡ã£ã¨ã™ã‚‹ã¨ç•°ãªã‚‹éƒ¨åˆ†ãŒã‚ã‚‹ã‹ã‚‚ã—ã‚Œã¾ã›ã‚“ã€‚ ç†è€…ã¯ g++/g77 ã®ä½¿ç”¨çµŒé¨“ãŒãªã„ã®ã§ã€ãã®å ´åˆã¯å¾¡å®¹èµ¦ã‚’é¡˜ã„ã¾ã™ã€‚ å®Ÿè¡Œå‰ ã‚ãƒ¼ãƒ¯ãƒ¼ãƒ‰ã€Œã‚³ãƒ³ãƒ‘ã‚¤ãƒ«ã‚ªãƒ—ã‚·ãƒ§ãƒ³, -Wall, -O2, -O4ã€ ã¾ãšã¯ gcc ã«ã‚ªãƒ—ã‚·ãƒ§ãƒ³ opt'-Wall' ã‚’ä»˜ã‘ã¦ã‚³ãƒ³ãƒ‘ã‚¤ãƒ«ã—ã€ è¦å‘ŠãŒãªããªã‚‹ã¾ã§ã‚½ãƒ¼ã‚¹ã‚’ä¿®æ£ã—ã¾ã™ã€‚ ã“ã‚Œã¯ å¸¸è˜ ã§ã™ã€‚ æ¬¡ã« opt'-O4 -Wall' ã§ã‚³ãƒ³ãƒ‘ã‚¤ãƒ«ã—ã¾ã™ã€‚ ã€ŒæœªåˆæœŸåŒ–å¤‰æ•°ã®ä½¿ç”¨ã€ã®è¦å‘Š (`foo' might be used uninitialized in this function) ã¯ã€ opt'-O4' ã‚’ä»˜
kanbayashi 2008/06/15
gcc

gdb

debugging

debugger

debug

*hackhack
ãƒªãƒ³ã‚¯
Develogger: Emacsä¸Šã§GDBã‚’ä½¿ç”¨ã—ã¦ãƒ‡ãƒãƒƒã‚°ã™ã‚‹
Emacsä¸Šã§GDBã‚’ä½¿ç”¨ã—ã¦Cè¨€èªžã®ãƒ—ãƒã‚°ãƒ©ãƒ ã‚’ãƒ‡ãƒãƒƒã‚°ã™ã‚‹æ–¹æ³•ã‚’ã¾ã¨ã‚ã¾ã™ã€‚ ãƒ‡ãƒãƒƒã‚°ã™ã‚‹ãƒ—ãƒã‚°ãƒ©ãƒ ã¯ã€Œsample.cã€ã¨ã„ã†ç°¡å˜ãªãƒ—ãƒã‚°ãƒ©ãƒ ã§ã™ã€‚ ä½¿ç”¨ç’°å¢ƒ: Ubuntu Linux7.10 Emacs22 GDB6.6 â– sample.c #include <stdio.h> void greeting(char *name); int main(int argc, char *argv[]) { int num1 = 10; int num2 = 100; int result = num1 + num2; printf("result=%d\n", result); greeting("satoshi"); return 0; } void greeting(char *name) { printf("Hello %s.\n", name); } 1. ã¾ãšæœ€åˆã«ã€Œsam
kanbayashi 2008/06/11
emacs

gdb

debugger

*ips

*hackhack
ãƒªãƒ³ã‚¯
http://www.ljfind.com/post/98990618/
kanbayashi 2008/04/03
qemu

gdb

debugger
ãƒªãƒ³ã‚¯
[Qemu-devel] Re: How to debug Linux kernel on qemu with kgdb?
kanbayashi 2008/04/03
qemu

gdb

debugger
ãƒªãƒ³ã‚¯
ã‚½ãƒ¼ã‚¹ã‚³ãƒ¼ãƒ‰ã‚’èªã‚€ãŸã‚ã®æŠ€è¡“
$Id: readingcode.html,v 1.13 2003/12/06 00:01:08 aamine Exp $ 2006-05-02 gonzui è¿½åŠ ã€‚thanks: å†¨å±±ã•ã‚“ 2003-12-03 ltrace ã¨ sotrace ã‚’è¿½åŠ 2003-12-03 ãƒ„ãƒ¼ãƒ«ã®ã¨ã“ã‚ã« DDD ã‚’è¿½åŠ ã€‚thanks: å’Œç”°ã•ã‚“ 2003-05-27 VCG, SXT ãªã©ã«ã¤ã„ã¦è¿½åŠ ã€‚thanks: æ¢…æ²¢ã•ã‚“ 2003-05-27 ã“ã‚Œã‚‚ã™ã£ã‹ã‚Šå¿˜ã‚Œã¦ã„ãŸ strace, ktrace, truss, etags ãªã©ã«ã¤ã„ã¦è¿½åŠ 2002-08-30 ã™ã£ã‹ã‚Šå¿˜ã‚Œã¦ã„ãŸ ctags ã‚’è¿½åŠ 2002-07-07 åŒ¿åå¸Œæœ›ã•ã‚“ã‹ã‚‰ãƒ¡ãƒ¼ãƒ«ã§ã„ãŸã ã„ãŸæƒ…å ±ã‚’è¿½åŠ (å‹•çš„ã‚³ãƒ¼ãƒ«ã‚°ãƒ©ãƒ•) 2002-06-13 æ—¥è¨˜çµŒç”±ã§ã„ãŸã ã„ãŸæ„è¦‹ã‚’ã‚‚ã¨ã«æ–‡ç« ã‚’è¿½åŠ ã€‚thanks: æŸ³å·ã•ã‚“ã€ã¾ã¤ã‚‚ã¨ã•
kanbayashi 2008/03/22
*hackhack

source

code

source code

cflow

gdb

reading
ãƒªãƒ³ã‚¯
ãƒªãƒ¢ãƒ¼ãƒˆãƒ‡ãƒãƒƒã‚°ã®éŠã³æ–¹
ç›®æ¬¡ ã¯ã˜ã‚ã« ãƒªãƒ¢ãƒ¼ãƒˆãƒ‡ãƒãƒƒã‚°ã®ã—ãã¿ gdbã®build gdbserverã‚‚ã©ãã®å®Ÿè£… gdbserverã‚‚ã©ãã®ä½¿ã„æ–¹ ãã®ä»– å±¥æ´ ã¯ã˜ã‚ã« ã‚·ãƒªã‚¢ãƒ«æŽ¥ç¶šã•ã‚ŒãŸPPCã‚¿ãƒ¼ã‚²ãƒƒãƒˆã®ãƒªãƒ¢ãƒ¼ãƒˆãƒ‡ãƒãƒƒã‚°ã‚¹ã‚¿ãƒ–(gdbserverã‚‚ã©ã) ã®ä½¿ã„æ–¹ãªã©ã‚’ã¾ã¨ã‚ã¦ã¿ã¾ã—ãŸã€‚ã‚¿ãƒ¼ã‚²ãƒƒãƒˆãŒæœ¬ç‰©PPCãªã®ã§ã‚¤ãƒžã‚¤ãƒéŠã¹ã‚‹äººãŒ å°‘ãªã„ã¨æ€ã†ã®ã§ã™ãŒã€ãã‚“ã¨ãã¯å˜ãªã‚‹èªã¿ç‰©ã¨ã—ã¦æ¥½ã—ã‚“ã§ãã ã•ã„ (ï¼œæ¥½ã—ã‚ã‚‹ã®ã‹ï¼Ÿ)ã€‚ gdbã®æ—¥æœ¬èªžãƒ‰ã‚ãƒ¥ãƒ¡ãƒ³ãƒˆã¨ã—ã¦ã€ KI's Unofficial GNU Manual Translation Project ã‚’å¤§ã„ã«å‚è€ƒã«ã•ã›ã¦ã„ãŸã ãã¾ã—ãŸ(GDBã®ãƒšãƒ¼ã‚¸ã‹ã‚‰ã‚‚ãƒªãƒ³ã‚¯ã•ã‚Œã¦ã„ã¦ã€ ã»ã¨ã‚“ã©officialã®ã‚ˆã†ãªæ„Ÿã˜ã§ã™)ã€‚ã“ã¡ã‚‰ã®æ–¹ã‚‚åˆã‚ã›ã¦å‚ç…§ã—ã¦ ã„ãŸãã¨ã€ã‚ˆã‚Šä½•ã‹ãŒ(???)æ·±ã¾ã‚‹ã‹ã‚‚çŸ¥ã‚Œã¾ã›ã‚“ã€‚ ãƒªãƒ¢ãƒ¼ãƒˆãƒ‡ãƒãƒƒ
kanbayashi 2007/11/24
gdb

protocol

gdbserver
ãƒªãƒ³ã‚¯
http://www.trashbox.jp/~moriwaka/doc/gdb-4.18/gdb-ja_14.html
kanbayashi 2007/11/22
gdb

remote

debugger

protocol
ãƒªãƒ³ã‚¯
redhat updateãƒžãƒ‹ãƒ¥ã‚¢ãƒ«
Planning Important planning recommendations and guidance to review before deploying. Considerations in adopting RHEL 9Key differences between RHEL 8 and RHEL 9 Getting the most from your Support experienceGathering troubleshooting information from RHEL servers with the sos utility Package manifestPackage listing for RedÂ Hat EnterpriseÂ LinuxÂ 9 Interactively installing RHEL from installation mediaIn
kanbayashi 2007/11/20
xen

xm

memory

dump

kernel

debug

debugger

gdb

core-dump
ãƒªãƒ³ã‚¯
Linuxã§ã‚¯ãƒ©ãƒƒã‚·ãƒ¥ãƒ€ãƒ³ãƒ—ã‚’æŽ¡å–(1) ã€œ kexec + kdump ã‚’ä½¿ã£ã¦ã¿ã‚‹ ã€œ : DSASé–‹ç™ºè€…ã®éƒ¨å±‹
å°‚ç”¨ãƒ‘ãƒ¼ãƒ†ã‚£ãƒ¼ã‚·ãƒ§ãƒ³ã‚’åˆ‡ã‚‰ãšã«ã‚·ã‚¹ãƒ†ãƒ ã‚’æ§‹ç¯‰ã—ã¦ã—ã¾ã£ãŸãŒãŸã‚ã«ã€ã‚¯ãƒ©ãƒƒã‚·ãƒ¥ãƒ€ãƒ³ãƒ—ã‚’æŽ¡å–ã§ããªãã¦è‹¦ã—ã‚“ã§ã„ã‚‹äººï¼ˆã£ã¦ç§ã§ã™ãŒï¼‰ã«ã¨ã£ã¦ã¯ã¨ã£ã¦ã‚‚é…åŠ›çš„ãªä»•çµ„ã¿ãŒã‚«ãƒ¼ãƒãƒ«ã«å–ã‚Šè¾¼ã¾ã‚ŒãŸã¿ãŸã„ã§ã™ã€‚å°Žå…¥æ‰‹é †ã‚‚ Documentation/kdump/kdump.txt ã«éžå¸¸ã«ã‚ã‹ã‚Šã‚„ã™ãæ›¸ã‹ã‚Œã¦ã„ã‚‹ã®ã§ã€æ¯”è¼ƒçš„ã‚¹ãƒ ãƒ¼ã‚ºã«çµ„ã¿è¾¼ã‚€ã“ã¨ãŒã§ããã†ãªäºˆæ„ŸãŒã—ã¾ã™ã€‚ kexec ã®æ©Ÿèƒ½ã‚’åˆ©ç”¨ã—ã¦åˆ¥ã®ã‚«ãƒ¼ãƒãƒ«ï¼ˆkdumpã‚’çµ„ã¿è¾¼ã‚“ã ã‚‚ã®ï¼‰ã‚’èµ·å‹•ã™ã‚‹ã¨ã€/proc/vmcore ã‹ã‚‰å…ƒã®ã‚«ãƒ¼ãƒãƒ«ã®ã‚¯ãƒ©ãƒƒã‚·ãƒ¥ãƒ€ãƒ³ãƒ—ã‚’æŽ¡å–ã§ãã‚‹ã¨ã„ã†ã‚‚ã®ãªã®ã§ã€é€šå¸¸åˆ©ç”¨ã™ã‚‹ã‚«ãƒ¼ãƒãƒ«ï¼ˆä»¥ä¸‹ã€ãƒ•ã‚¡ãƒ¼ã‚¹ãƒˆã‚«ãƒ¼ãƒãƒ«ï¼‰ã¨ã€ãƒ‘ãƒ‹ãƒƒã‚¯æ™‚ã«å‹•ãå§‹ã‚ã‚‹ã‚«ãƒ¼ãƒãƒ«ï¼ˆä»¥ä¸‹ã€ã‚»ã‚«ãƒ³ãƒ‰ã‚«ãƒ¼ãƒãƒ«ï¼‰ã®äºŒã¤ã®ã‚«ãƒ¼ãƒãƒ«ã‚’ä½œã‚‹å¿…è¦ãŒã‚ã‚Šã¾ã™ã€‚ ä»¥ä¸‹ã€kdump.txt ã‚ˆã‚ŠæŠœç²‹ A) First kernel or regular kernel: -----
kanbayashi 2007/11/13
kexec

vm

kernel

linux

gdb

debug

debugger
ãƒªãƒ³ã‚¯
White's Free Talk : 2000å¹´12æœˆå¾ŒåŠ
â€¦â€¦ã®ã¯ãšãŒã€æš‡ã«ã¾ã‹ã›ã¦Progressiveã®åŽŸç¨¿æ›¸ã„ãŸã‚Šã¨ã‹ã€ãƒ™ã‚¢ãƒ«ãƒ•ã‚¡ãƒ¬ã‚¹ã‚’ã‚„ã£ã¦ãŸã‚Šã¨ã‹ã€‚ ã‚ãƒ¼ã€GameDeepç”¨ã«pLaTeXå›žã‚Šã®è¨å®šã‚‚ã‚„ã£ã¦ã¾ã—ãŸãã‡ã€‚ ãŠã†ã¡ã®Windowsæ©Ÿã®pLaTeXã¨GhostScriptã«ã€ã«ãƒ•ã‚©ãƒ³ãƒˆè¿½åŠ ã—ã¦dvipskã§å¤‰æ›ã‚‚ã§ãã‚‹ã‚ˆã†ã«ã—ã¾ã—ãŸã€‚ã‚ããªãƒ‰ã‚ãƒ¥ãƒ¡ãƒ³ãƒˆã‚‚ã¿ãšã«ã‚„ã£ãŸã®ã§ã€æ™‚é–“ã‹ã‹ã‚Šã¾ãã‚Šã€‚ç´ ç›´ã«TeX ã§å¤šæ›¸ä½“ã‚’ã‚ãŸã‚Šã‹ã‚‰æ–‡æ›¸ã‚ã•ã‚Œã°ã„ã„ã®ã«ã€ã‚ã‚Œã“ã‚Œè©¦è¡ŒéŒ¯èª¤ã—ã¦ã¾ã—ãŸã€‚ pLaTeXç”¨ã«ã¯è¿½åŠ ãƒ•ã‚©ãƒ³ãƒˆç”¨ã‚¹ã‚¿ã‚¤ãƒ«ãƒ•ã‚¡ã‚¤ãƒ«ãƒ»fd(font description?)ãƒ»tfm (tex font metric)ã‚’è¿½åŠ ã€‚dvipskç”¨ã«ã¯vf (virtual font)ã®è¿½åŠ ã¨TeX -> PSãƒ•ã‚©ãƒ³ãƒˆç½®ãæ›ãˆãƒ†ãƒ¼ãƒ–ãƒ«ã®è¿½è¨˜ã€‚ã§ã‚‚ã£ã¦ã€GhostScriptç”¨ã«ã¯vflibç”¨ã®TrueTypeãƒ•ã‚©ãƒ³ãƒˆè¿½åŠ è¨å®šã‚’è¡Œãªã„ã¾ã—ãŸã§ã™ã€‚ã
kanbayashi 2007/11/11
vmware

serial

gdb

debugger

vm

xen
ãƒªãƒ³ã‚¯
çµ„ã¿è¾¼ã¿Linuxã‚«ãƒ¼ãƒãƒ«æ§‹ç¯‰ã®å®Ÿéš›
5. Linuxã‚«ãƒ¼ãƒãƒ«ã®ãƒ‡ãƒãƒƒã‚°æ‰‹æ³• ã‚«ãƒ¼ãƒãƒ«ãŒã†ã¾ããƒ–ãƒ¼ãƒˆã—ãªã„ã€å‹•ä½œãŒãŠã‹ã—ã„ã€ãƒ‡ãƒã‚¤ã‚¹ãƒ‰ãƒ©ã‚¤ãƒãŒå‘¼ã³å‡ºã•ã‚Œãªã„ã¨ã„ã£ãŸå ´åˆã€ã‚«ãƒ¼ãƒãƒ«ã‚’ãƒ‡ãƒãƒƒã‚°ã™ã‚‹å¿…è¦ãŒç”Ÿã˜ã¾ã™ã€‚ã‚«ãƒ¼ãƒãƒ«ã®ãƒ‡ãƒãƒƒã‚°ã«ã¯æ§˜ã€…ãªæ–¹æ³•ãŒã‚ã‚Šã¾ã™ãŒã€æœ¬ç¯€ã§ã¯kgdbã«ã¤ã„ã¦èª¬æ˜Žã—ã¾ã™ã€‚ kgdbã‚’ä½¿ç”¨ã™ã‚‹ãŸã‚ã«ã¯ã€ã‚«ãƒ¼ãƒãƒ«ã®ã‚³ãƒ³ãƒ•ã‚£ã‚°ãƒ¬ãƒ¼ã‚·ãƒ§ãƒ³ã§Kernel hackingã®é …ç›®ã‚’é–‹ãã€kgdbã‚’ã‚ªãƒ³ã«ã—ã¦ã‚«ãƒ¼ãƒãƒ«ã‚’ãƒ“ãƒ«ãƒ‰ã™ã‚‹å¿…è¦ãŒã‚ã‚Šã¾ã™ã€‚ãã—ã¦ã€ãƒ“ãƒ«ãƒ‰ã—ãŸã‚«ãƒ¼ãƒãƒ«ã‚’ã‚¿ãƒ¼ã‚²ãƒƒãƒˆã«ãƒ€ã‚¦ãƒ³ãƒãƒ¼ãƒ‰ã—ã€å®Ÿè¡Œã—ã¾ã™ã€‚ã™ã‚‹ã¨ã€ã‚«ãƒ¼ãƒãƒ«ãŒéƒ¨åˆ†çš„ã«ãƒ–ãƒ¼ãƒˆã—ã€$T0540:c0009a34;01:c015be40;#80(gdbã®Remore Serial Protcolã§ã™)ã®ã‚ˆã†ã«gdbã®æŽ¥ç¶šå¾…ã¡ãƒ¡ãƒƒã‚»ãƒ¼ã‚¸ã‚’å‡ºåŠ›ã—ã¦åœæ¢ã—ã¾ã™ã€‚ã“ã®çŠ¶æ…‹ã«ãªã£ãŸã‚‰ã€ãƒ›ã‚¹ãƒˆä¸Šã®gdbã‹ã‚‰ã‚¿ãƒ¼ã‚²ãƒƒãƒˆãƒœãƒ¼ãƒ‰ä¸Šã®ã‚«ãƒ¼ãƒãƒ«ã«æŽ¥ç¶šã™ã‚‹ã“ã¨ãŒå‡ºæ¥ã¾ã™ã€‚ã‚‚ã¡ã‚ã‚“ã€ãƒãƒƒ
kanbayashi 2007/09/26
*technique

linux

gdb

debug

debugger

kgdb

xen

os

vm
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