IOKit KEXT Questions
IOKit KEXT Questions
- Subject: IOKit KEXT Questions
- From: Matt Burnett <email@hidden>
- Date: Wed, 15 Aug 2007 17:21:08 -0500
| I have 2 questions regarding IOKit KEXTs.
- How does IOMemoryDescriptor deal with memory protection (mprotect/vm_protect)? Is there a class available to check/change the protection of certain pages in memory or should i use mprotect/vm_protect?
- Why do IOKit KEXTs have issues resolving kernel symbols, and what can i do to work around it. For example if i create a KEXT in C, i can lookup the address of any symbol which is in /mach.sym, however I get unresolved symbol errors if i do the same in a IOKit KEXT.
Example HelloIOKit.cpp Code: extern "C" int execve(void *, void *, int *); ... IOLog("Found execve at %p\n",execve); Example kextload output: kextload: extension HelloIOKit.kext appears to be valid kld(): Undefined symbols: _execve ...
Thanks -Matt Burnett |
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