Entry Point Address of loaded program.

Pankaj Shrivastava · New User Joined: 24 Jul 2009 Posts: 51 Location: Pune

For debugging and dump analysis we find the failing instruction address through the PSW. The difference in the entry point address of the Loaded program and the PSW address ( 24 bits) gives the displacement of the failing address.Can somebody help me ,How do find the entry point address of the loaded program?

enrico-sorichetti · Posted: Fri Jul 24, 2009 10:09 pm

the dump will tell the load address,
the linkage editor/binder output will tell the entry point address
a bit of hex math will yield the result

but all that will be useless, because the psw value should be matched against the load address

Pankaj Shrivastava · New User Joined: 24 Jul 2009 Posts: 51 Location: Pune

Can you please explain it in bit more detail..may some screen shot

what is differenc b/w load address and entry point address .

enrico-sorichetti · Posted: Fri Jul 24, 2009 10:18 pm

that' s very basic

an entry point is much more, but in the context of Your question ...
load address is the address at wich the thing will/has been loaded
entry point address is the address ( relocated ) of the first instruction that will be executed when the program will get control

more technically an entry point address is something that will/needs to be externalized to other csects/components of the whole shebang

enrico-sorichetti · Posted: Fri Jul 24, 2009 10:23 pm

all Your doubts ( in this post, and in the other ones ) will be easily resolved by looking/Reading the appropriate manuals
starting from

publibz.boulder.ibm.com/cgi-bin/bookmgr_OS390/Shelves/ASMSH020?searchRequest=csect&SEARCH=Search&Type=FUZZY&SearchTopic=TOPIC&searchText=TEXT&searchIndex=INDEX&rank=RANK

Pankaj Shrivastava · New User Joined: 24 Jul 2009 Posts: 51 Location: Pune

I am not very proficient in dump analysis ... I could'nt get your last statement : but all that will be useless, because the psw value should be matched against the load address

Well I dont have abendaid in my project ..how should i calculate the NSI then ..if PSW value is also not helpful.

enrico-sorichetti · Posted: Fri Jul 24, 2009 10:37 pm

abend AID is irrelevant to the understanding of the whole issue

looks like there is language barrier here,
reread the statement You were trying to quote, and You will see that I said nothing about the PSW,
I pointed out that You were using the wrong other address the entry instead of the load

enrico-sorichetti · Posted: Fri Jul 24, 2009 10:46 pm

follow on ... reworded in the hope of clarifying

Pankaj Shrivastava · New User Joined: 24 Jul 2009 Posts: 51 Location: Pune

Ohh ..got you .Sorry misinterpreted that .

Ya ..Its clear..its load address which is considered instead of Entry point address

Thanks