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Groups > comp.lang.c > #10714

Re: C error messages

From Nobody <nobody@nowhere.com>
Subject Re: C error messages
Date 2011-09-22 18:08 +0100
Message-Id <pan.2011.09.22.17.08.38.712000@nowhere.com>
Newsgroups comp.lang.c
References <j5dh8j$dim$1@speranza.aioe.org>
Organization Zen Internet

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On Wed, 21 Sep 2011 20:25:55 +0000, Quentin Pope wrote:

> What is the principle difference between a Bus Error and a Segmentation 
> Fault please.

Ultimately, it depends upon which interrupt the hardware generates.

Typically, SIGSEGV arises from accessing a virtual memory page which
is either not backed by physical memory or which doesn't permit the
requested operation (e.g. write to a read-only page), while SIGBUS arises
from a misaligned access on an architecture which has alignment
constraints.

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Thread

C error messages Quentin Pope <qp19433@hotmail.NOSPAM.com> - 2011-09-21 20:25 +0000
  Re: C error messages blp@cs.stanford.edu (Ben Pfaff) - 2011-09-21 13:36 -0700
    Re: C error messages Quentin Pope <qp19433@hotmail.NOSPAM.com> - 2011-09-22 21:07 +0000
      Re: C error messages blp@cs.stanford.edu (Ben Pfaff) - 2011-09-22 14:34 -0700
      Re: C error messages Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2011-09-22 16:05 -0600
      Re: C error messages Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-09-22 21:21 -0400
  Re: C error messages Nobody <nobody@nowhere.com> - 2011-09-22 18:08 +0100
  Re: C error messages Phil Carmody <thefatphil_demunged@yahoo.co.uk> - 2011-09-23 12:00 +0300

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