From: Daniel Jacobowitz <drow@false.org>
To: Shaun Jackman <sjackman@gmail.com>
Cc: gdb@sources.redhat.com
Subject: Re: Modifying a verboten register
Date: Thu, 04 May 2006 14:52:00 -0000 [thread overview]
Message-ID: <20060504145211.GB32605@nevyn.them.org> (raw)
In-Reply-To: <7f45d9390605040745o4c332058te1e289e5d5e9620@mail.gmail.com>
On Thu, May 04, 2006 at 08:45:44AM -0600, Shaun Jackman wrote:
> Targetted for arm-elf, gdb does not let me modify the cpsr register
> outside of a "normal" frame.
>
> (gdb) p/x $cpsr=0x3f
> Value being assigned to is no longer active.
I posted an explanation of this problem on gdb-patches yesterday, as it
happens, with a nasty hack.
> Parties aside, the JTAG interface I use (BDI2000) has a command mode
> (Telnet interface) that I can use to modify the register. GDB seems to
> cache its view of the registers though.
Correct.
> (gdb) p/x $cpsr
> $1 = 0xd7
>
> [in a galaxy far, far away]
> BDI>rm cpsr 0x3f
> BDI>rd cpsr
> cpsr: 0x0000003f 63
Right here, use the flushregs command in GDB.
> (gdb) p/x $cpsr
> $2 = 0xd7
--
Daniel Jacobowitz
CodeSourcery
next prev parent reply other threads:[~2006-05-04 14:52 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-05-04 14:45 Shaun Jackman
2006-05-04 14:52 ` Daniel Jacobowitz [this message]
2006-05-04 15:15 ` Shaun Jackman
2006-07-12 23:16 ` Shaun Jackman
2008-02-29 11:13 ` Shaun Jackman
2008-02-29 13:41 ` Daniel Jacobowitz
2008-02-29 18:22 ` Shaun Jackman
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