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binary compatibility ABI (was: Re: [boehm-gc] Import 6.3 alpha 1)

From: Andrew Haley <aph at redhat dot com>
To: Jeff Sturm <jsturm at one-point dot com>
Cc: Bryce McKinlay <bryce at mckinlay dot net dot nz>, Ranjit Mathew <rmathew at hotmail dot com>, <java at gcc dot gnu dot org>
Date: Thu, 14 Aug 2003 08:33:12 +0100
Subject: binary compatibility ABI (was: Re: [boehm-gc] Import 6.3 alpha 1)
References: <BDBB1C59-C49E-11D7-BB9C-003065F97F7C@mckinlay.net.nz><Pine.LNX.4.44.0308131326430.2750-100000@ops2.one-point.com>

Jeff Sturm writes:
 > 
 > One of my sore points is the performance gap between static and
 > position-independent code with the current gcj compiler.  For example:
 > reading a static field requires one memory load without -fPIC, but two
 > loads with -fPIC (to obtain the memory address from the GOT offset).

Short of overwriting the instruction that does the fetch, how would you
do that?

Andrew.

Follow-Ups:
- Re: binary compatibility ABI (was: Re: [boehm-gc] Import 6.3 alpha1)
  - From: Jeff Sturm

References:
- Re: [boehm-gc] Import 6.3 alpha 1
  - From: Bryce McKinlay
- binary compatibility ABI (was: Re: [boehm-gc] Import 6.3 alpha 1)
  - From: Jeff Sturm

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