PT_DENY_ATTACH is a non-standard ptrace() request type that prevents a debugger from attaching to the calling process. Adam Leventhal recently discovered that Leopard extends PT_DENY_ATTACH to prevent introspection into processes using dtrace. This article will cover disabling PT_DENY_ATTACH for all processes on Mac OS X 10.5. Over the previous few years, I've provided similar hacks for both Mac OS X 10.4, and 10.3.
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Member since:
2005-11-21
Member since:
2006-03-17
Think ill guy buy a bluray drive, hire movies, dtrace them so i can crack them and sell the copies on ebay, then ill go hack the itunes drm and give the spoils away for free on bit torrent ... Ill have to look around to see what other stuff i can do after that :-)
Or i might just go apply the patch and be happy my drace will work as advertised ... undecided !
Ohh and good man Landon for taking the time to do this....
Edited 2008-01-24 00:22 UTC
Member since:2006-03-17
Damn edit expired on me .. apologies for the double post .. This patch works it seems, Adams test d script shows the probe firing every 10 secs even with iTunes running, only 5 mins to compile and attach teh extension too, dmesg shows exactly what Landon says :-)
Macintosh-2:Deployment Cass$ ps -ef |grep iTunes|egrep -v "Helper|grep"
501 34206 141 0 0:01.14 ?? 0:04.11 /Applications/iTunes.app/Contents/MacOS/iTunes -psn_0_1511793
Macintosh-2:Deployment Cass$ sudo dtrace -s test.d |grep tick
dtrace: script 'test.d' matched 2 probes
0 22128 :tick-10s
0 22128 :tick-10s
0 22128 :tick-10s
0 22128 :tick-10s
0 22128 :tick-10s
acintosh-2:Deployment Cass$ sudo dtrace -s test2.d
dtrace: script 'test2.d' matched 2 probes
CPU ID FUNCTION:NAME
0 22196 :tick-1s
2000
0 22196 :tick-1s
1998
0 22196 :tick-1s
1997
0 22196 :tick-1s
1996
0 22196 :tick-1s
1997
Nice work Landon
Edited 2008-01-24 00:56 UTC
Member since:
2006-01-02
Member since:2005-07-06
To install a kext (kernel extension) file as the author does you need to be able to create files with root:wheel. If someone already has that ability all hope is pretty much gone.
