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Re: baffling assembly-level weirdness

From: Daniel Jacobowitz <drow at false dot org>
To: Mathieu Lacage <mathieu dot lacage at gmail dot com>
Cc: gdb at sourceware dot org
Date: Mon, 26 Jan 2009 10:41:38 -0500
Subject: Re: baffling assembly-level weirdness
References: <74fef6df0901260724p188c5507x2cfa3a4283f6fd41@mail.gmail.com>

On Mon, Jan 26, 2009 at 04:24:40PM +0100, Mathieu Lacage wrote:
> hi,
> 
> The following gdb session baffles me completely: %edx is reset to zero
> by the mov at address 0x0804ad62 instead of being set to the constant
> 0x804ad62. Of course, this code segfaults at $pc = 0x804ad68 when zero
> is dereferenced...
> 
> Version: GNU gdb 6.8
> 
> (gdb) disas $pc $pc+10
> Dump of assembler code from 0x804ad62 to 0x804ad6c:
> 0x0804ad62 <indent+50>:	mov    0x805e3c0,%edx

This is a load from memory at address 0x805e3c0, in x86 syntax.

-- 
Daniel Jacobowitz
CodeSourcery

Follow-Ups:
- Re: baffling assembly-level weirdness
  - From: Paul Pluzhnikov

References:
- baffling assembly-level weirdness
  - From: Mathieu Lacage

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