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Re: Application entry point
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Re: Application entry point


  • Subject: Re: Application entry point
  • From: Greg Parker <email@hidden>
  • Date: Mon, 13 Jul 2009 12:44:31 -0700

On Jul 12, 2009, at 10:50 PM, Aron-Zvi wrote:
Thanks for the quick reply Greg.

How do I scan the load commands?

Read mach-o/loader.h. Step through the load commands, starting just after the mach_header (or mach_header_64). Use load_command->cmd to check for LC_UNIXTHREAD, and use load_command->cmdsize to find the next load command.


* The load commands directly follow the mach_header. The total size of all
* of the commands is given by the sizeofcmds field in the mach_header. All
* load commands must have as their first two fields cmd and cmdsize. The cmd
* field is filled in with a constant for that command type. Each command type
* has a structure specifically for it. The cmdsize field is the size in bytes
* of the particular load command structure plus anything that follows it that
* is a part of the load command (i.e. section structures, strings, etc.). To
* advance to the next load command the cmdsize can be added to the offset or
* pointer of the current load command.



-- Greg Parker email@hidden Runtime Wrangler


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References: 
 >Application entry point (From: Aron-Zvi <email@hidden>)
 >Re: Application entry point (From: Greg Parker <email@hidden>)
 >Re: Application entry point (From: Aron-Zvi <email@hidden>)

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