systemVid_encDecIvaChMapTbl

Your ivaMap is correct. Anyhow even if it is wrong ivaMap cannot cause segmentation fault on A8. Looks like your application is not handling some condition like not IpcBitsOutBuffer or no ipcBitsInBuffer availability. Check backtrace to see what is the cause of segmentation fault.

Badri ,thanks for  your help.in the RDK whether some interface can backtrace the segmentation fault?

or i have use the linux GDB to trace the fault?

RDK doesn't have any utility for backtrace. You will have to use gdb

i have use the GDB to debug ,but i found that is not right .so you said that

your application is not handling some condition like not IpcBitsOutBuffer or no ipcBitsInBuffer availability

but in my app when 

in enc :Venc_getBitstreamBuffer() not get buffer ,i will call the Venc_releaseBitstreamBuffer() to release the buffer

in dec: i use the Vdec_requestBitstreamBuffer() to get buffer 

It is difficult to debug without analyzing backtrace. Check this post how to compile rdk with debug options

RE:
compiling RDK with debuging option

Refer /dvr_rdk/demos/mcfw_api_demos/mcfw_demo/demo.c

SIGSEGV_handler

You may be able to get some backtrace and then use addr2line to identify source of seg fault but it is better to use gdb to debug backtrace.

You should not call  Venc_releaseBitstreamBuffer if you dint get any buffer.