Re: Reading power PC MPC 8260 program counter (Next Instruction address)

From	jeffj@panix.com (Jeff Jonas)
Newsgroups	comp.os.linux.embedded
Subject	Re: Reading power PC MPC 8260 program counter (Next Instruction address)
Date	2011-02-11 03:31 -0500
Organization	Jeff's House of Electronic Parts
Message-ID	<ij2s4o$lv7$1@panix5.panix.com> (permalink)
References	<OcadnWOytc0SFczQ4p2dnAA@giganews.com> <5O-dnRBA-e3rFM_QnZ2dnUVZ8vudnZ2d@lyse.net> <7429c9ef-5603-45fc-a1db-abf32c436f6e@k38g2000vbn.googlegroups.com> <OfednQeFWbJgKM_QnZ2dnUVZ7tOdnZ2d@lyse.net>

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Perhaps I'm being rather naive about the situation
but unless you're trying to get the address after memory mapping
and/or virtual memory translation, won't
    &(main)
give the address of main(),
enough to determine if it's in RAM or ROM in an embedded system?

Profiling system calls & libraries such as profil(3)
give indirect access to the program counter.

Try as I might, I don't see a way to access the program counter
even via a signal handler since the return address is on the stack-frame
which is not usually accessible (but can be via stack-variable tricks).

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Re: Reading power PC MPC 8260 program counter (Next Instruction address) David Brown <david@westcontrol.removethisbit.com> - 2011-02-09 13:32 +0100
  Re: Reading power PC MPC 8260 program counter (Next Instruction address) Lew Pitcher <lpitcher@teksavvy.com> - 2011-02-09 07:01 -0800
    Re: Reading power PC MPC 8260 program counter (Next Instruction address) David Brown <david@westcontrol.removethisbit.com> - 2011-02-09 16:44 +0100
  Re: Reading power PC MPC 8260 program counter (Next Instruction address) Lew Pitcher <lpitcher@teksavvy.com> - 2011-02-09 06:16 -0800
    Re: Reading power PC MPC 8260 program counter (Next Instruction address) David Brown <david@westcontrol.removethisbit.com> - 2011-02-09 16:42 +0100
      Re: Reading power PC MPC 8260 program counter (Next Instruction address) Niklas Holsti <niklas.holsti@tidorum.invalid> - 2011-02-12 09:35 +0100
      Re: Reading power PC MPC 8260 program counter (Next Instruction address) Tauno Voipio <tauno.voipio@notused.fi.invalid> - 2011-02-12 10:06 +0200
      Re: Reading power PC MPC 8260 program counter (Next Instruction address) jeffj@panix.com (Jeff Jonas) - 2011-02-11 03:31 -0500

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