Ida Python SegCreate problem [Archive] - RCE Messageboard's Regroupment

ZaiRoN

January 13th, 2006, 11:23

Hi.
Playing a little with IDa Python I was trying to create a new segment using the function SegCreate. From Ida help you can read the syntax of the function:

Code:

success SegCreate(long startea,long endea,long base,long use32,long align,long comb);

where:

//	  startea  - linear address of the start of the segment

//	  endea	- linear address of the end of the segment

//	   this address will not belong to the segment

//	   'endea' should be higher than 'startea'

//	  base	 - base paragraph or selector of the segment.

//	   a paragraph is 16byte memory chunk.

//	   If a selector value is specified, the selector should be

//	   already defined.

//	  use32	- 0: 16bit segment, 1: 32bit segment, 2: 64bit segment

//	  align	- segment alignment. see below for alignment values

//	  comb	 - segment combination. see below for combination values.

// returns: 0-failed, 1-ok

The definition of the function taken from idc.py is almost the same:

Code:

def SegCreate(startea, endea, base, use32, align, comb)

so I tried to use:

Code:

SegCreate(0x610000, 0x620000, 0x1, 0x1, 0x2, 0x2)

Unfortunatly I received an error... So, looking at the definition of the function -inside ida.py- I noticed something strange:

Code:

def SegCreate(startea, endea, base, use32, align, comb):

	...

	success = idaapi.add_segm(startea, endea, para, "Segment", "CODE"

	...

Look at the third parameter: para
This is an error, 'para' is never defined/used/referred before. The right parameter should be 'base'; I tried to change the parameters but I got a warning message, this time from ida:
"Create a segment (00620000-00000001): end address is lower than start address."
Seems like there is something wrong with the order of the parameters. The right sequence is base-startea-endea.

I mailed the author but I didn't receive a reply so I decided to write it here. Is there someone that had the same problem?

Regards,
ZaiRoN

ZaiRoN

January 24th, 2006, 17:38

Just to let you know Ida Python 0.8.0 is out at the same address: http://www.d-dome.net/idapython/
The segcreate problem is still alive but the author resolved the problem fixing the file idc.py; he 'll upload the new version sooner. I have the updated file which I won't upload here until Dyce will give me the authorization, but if you have any kind of problems with the function don't esitate to contact me.

Regards,
ZaiRoN