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Re: question on arm objdump

From: Joel Sherrill <joel dot sherrill at oarcorp dot com>
To: "ramana dot radhakrishnan at arm dot com" <ramana dot radhakrishnan at arm dot com>
Cc: "binutils at sourceware dot org" <binutils at sourceware dot org>
Date: Mon, 3 Aug 2009 11:28:23 -0500
Subject: Re: question on arm objdump
References: <4A7709D2.3000905@oarcorp.com> <1249315893.17346.17.camel@e200593-lin.cambridge.arm.com>

Ramana Radhakrishnan wrote:

So I think it is using a pc-relative instruction to fetch the address of rtems_maximum_priority and then loading that.
Am I right in my interpretation?
Yes, you are looking at a constant / literal pool.

Thanks.

Just to let you know what I am doing, we are doing
binary test coverage analysis on RTEMS using the
execution coverage maps from Skyeye.  These addresses
are in the .text but cannot be executed so show up
as unexecuted.  I have modified the program we use
to mark up the objdump to note that ".word" "instructions"
can be counted as executed for our purposes.

On the SPARC, we did the same thing with nop's put
between methods for alignment.  We are above 99% coverage
on the SPARC and now we are looking at using
Skyeye to get the numbers on another architecture.

cheers Ramana

--
Joel Sherrill, Ph.D.             Director of Research & Development
joel.sherrill@OARcorp.com        On-Line Applications Research
Ask me about RTEMS: a free RTOS  Huntsville AL 35805
  Support Available             (256) 722-9985

References:
- question on arm objdump
  - From: Joel Sherrill
- Re: question on arm objdump
  - From: Ramana Radhakrishnan

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