Re: Application entry point
Re: Application entry point
- Subject: Re: Application entry point
- From: Aron-Zvi <email@hidden>
- Date: Mon, 13 Jul 2009 08:50:57 +0300
Thanks for the quick reply Greg.
How do I scan the load commands?
On Mon, Jul 13, 2009 at 8:16 AM, Greg Parker
<email@hidden> wrote:
On Jul 12, 2009, at 8:58 PM, Aron-Zvi wrote:
I'd like to know if it's possible to retrieve an application's entry point programatically on OS X.
More specifically, I'd like to retrieve the thread state in the LC_UNIXTHREAD load command and extract eip's value.
I've found getsectdatafromheader() which requires a mach header. I've only found _dyld_get_image_header to get the mach header, however, I found nothing that retrieves a regular executable's (not a loaded shared library...) mach header.
If your code is compiled as part of the executable, you can use _mh_execute_header from mach-o/ldsyms.h. But that won't work if your code is part of a library or bundle.
Note that the functions in mach-o/getsect.h will only look up LC_SEGMENT contents. You probably need to scan the load commands manually to find LC_UNIXTHREAD.
--
Greg Parker email@hidden Runtime Wrangler
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