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Date: Thu, 30 May 2002 03:12:00 -0000
From: Richard Henderson <rth@redhat.com>
To: Michal Ludvig <mludvig@suse.cz>
Cc: gcc@gcc.gnu.org, gdb <gdb@sources.redhat.com>
Subject: Re: What is LSDA?
Message-ID: <20020530031226.B4984@redhat.com>
Mail-Followup-To: Richard Henderson <rth@redhat.com>,
	Michal Ludvig <mludvig@suse.cz>, gcc@gcc.gnu.org,
	gdb <gdb@sources.redhat.com>
References: <3CF4CC74.9050307@suse.cz> <20020529110320.I4168@redhat.com> <3CF5D7D7.40107@suse.cz>
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In-Reply-To: <3CF5D7D7.40107@suse.cz>; from mludvig@suse.cz on Thu, May 30, 2002 at 09:42:15AM +0200
X-SW-Source: 2002-05/txt/msg00328.txt.bz2

On Thu, May 30, 2002 at 09:42:15AM +0200, Michal Ludvig wrote:
> What other differences can I expect between eh_frame and debug_frame? 
> For now I handle both of them almost in the same way.
> Exceptions are: Different CIE-id, different way of finding the right CIE 
> for a given FDE, and from now on ignoring LSDA in eh_frame.
> Is there something else?

The encoding of the addresses can be substantially different.
Pc-relative and base-relative are the popular ones.  You'd
need target-specific hackery to know what the base address is
for the base-relative addresses.

That more and more differences crept in is the reason why we no
longer attempt to emit only one of .debug_frame or .eh_frame.


r~