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Re: arm interrupts using keyword attribute

From: Richard Earnshaw <rearnsha at arm dot com>
To: "Michael U. Slaughter" <simpleproduct at yahoo dot com>
Cc: crossgcc at sources dot redhat dot com, Richard dot Earnshaw at arm dot com
Date: Wed, 17 Apr 2002 18:19:46 +0100
Subject: Re: arm interrupts using keyword __attribute__
Organization: ARM Ltd.
Reply-to: Richard dot Earnshaw at arm dot com

> Hi All,
> 
> I'm using the gcc 3.0.4 with newlib10 for the ARM 
> (ARM7tdmi core)
> 
> the following C code generates the ASM interrupt
> handler below:
> It seems to me that the first statement mov ip,sp is
> wrong.
> The ip (R12) is not a banked register.  This handler
> seems to trash the
> the soft-float math pack. Am I missing something about
> how the register 
> are used?

this is a known bug.  You might get correct code if you compile the module 
with -fomit-frame-pointer, but I can't remember.

R.


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References:
- arm interrupts using keyword __attribute__
  - From: Michael U. Slaughter

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Re: arm interrupts using keyword __attribute__

Re: arm interrupts using keyword attribute