lkml.org 
[lkml]   [1999]   [Mar]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: lots of 2.2.4 oopses
On Fri, 26 Mar 1999, Jeffrey A Law wrote:

>Even if you can just track it down to "file x when compiled with egcs results
>in an unstable system" would be a big help in tracking down this problem.

Well in the last days I discovered a new way to cause egcs-2.91.60
19981201 (egcs-1.1.1 release) to miscompile a piece of code using
regparm=3 (I don't think gcc-2.7.2 would have worked but it worth to try,
but I don't have it here). Simply declare do_bottom_half in
include/linux/interrupt.h as a ... FASTCALL(do_bottom_half(... and you'll
notice that the asm of do_bottom_half will start anyway with an `xor
%eax,%eax'...

But I know you don't care about regparm safety (ahh bad). If regparm would
work on i386 we could compile the whole kernel with regparm=3, and it
would be a _big_ improvement. Someday I'll go into that.

At least I hope that the Mercede won't use the stack to pass the first
parameters to the called function as default calling convention.

Andrea Arcangeli


-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.rutgers.edu
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:51    [W:0.356 / U:0.040 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site