Article View: gnu.gcc.bug
Article #2856Re: GCC 1.36 (386 System V) __builtin_alloca does not align the stack.
From: James Van Artsdalen
Date: Wed, 07 Feb 1990 01:30
Date: Wed, 07 Feb 1990 01:30
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1497 bytes
In <1965@osc.COM>, rp@osc.COM (Rich Patterson) wrote: > Here is a bug that I've found in gcc. > Synopsis: GCC's (1.36 386 System V) builtin alloca function does not align > the stack. > Description: When compiling GDB 3.4 with GCC 1.36 the program will > core dump when starting up in tgetent. Yes, this is a bug and not a performance issue. This is also the cause of a bug I have been trying to figure out in emacs for quite some time. The 386 (and presumably the 486) can misbehave when the stack is not aligned. I saw this last year in some ROM based code, but did not get a chance to prove it with a logic analyzer. Aligning the stack has appeared to fix several mysterious problems. -- James R. Van Artsdalen james@raid.dell.com "Live Free or Die" Dell Computer Corporation 9505 Arboretum Blvd Austin TX 78759 512-338-8789
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arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!clyde.concordia.ca!mcgill-vision!bloom-beacon!snorkelwacker!usc!brutus.cs.uiuc.edu!wuarchive!texbell!uudell!raid!jamesReferences:
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!clyde.concordia.ca!mcgill-vision!bloom-beacon!snorkelwacker!usc!brutus.cs.uiuc.edu!wuarchive!texbell!uudell!raid!james From: james@raid.dell.com (James Van Artsdalen) Newsgroups: gnu.gcc.bug Subject: Re: GCC 1.36 (386 System V) __builtin_alloca does not align the stack. Keywords: alloca builtins gcc-1.36 386 System V Message-ID: <1739@uudell.dell.com> Date: 7 Feb 90 01:30:09 GMT References: <1965@osc.COM> Sender: news@uudell.dell.com Reply-To: james@raid.dell.com (James Van Artsdalen) Distribution: na Organization: Institute for Applied Cosmology Lines: 19