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Re: __builtin_return_address()

To: "H . J . Lu" <hjl at lucon dot org>
Subject: Re: __builtin_return_address()
From: Richard Henderson <rth at redhat dot com>
Date: Sun, 22 Jul 2001 23:30:37 -0700
Cc: Falk Hueffner <falk dot hueffner at student dot uni-tuebingen dot de>, gcc at gcc dot gnu dot org, gcc-patches at gcc dot gnu dot org
References: <3B5AE146.4BA815E8@codesourcery.com> <87k810ao1h.fsf@student.uni-tuebingen.de> <20010722213652.A13909@redhat.com> <20010722223153.A20980@lucon.org>

On Sun, Jul 22, 2001 at 10:31:53PM -0700, H . J . Lu wrote:
> +On some machines it may be impossible to determine the frame address of
> +any function other than the current one; in such cases, or when the top
> +of the stack has been reached, this function will return @code{0}.

Not necessarily true.  This requires startup code to 
initialize the first frame pointer appropriately.


r~

References:
- ast-optimizer-branch
  - From: Nathan Sidwell
- __builtin_return_address()
  - From: Falk Hueffner
- Re: __builtin_return_address()
  - From: Richard Henderson
- Re: __builtin_return_address()
  - From: H . J . Lu

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