Subject:
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RE: legOS ... really a stack question
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Newsgroups:
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lugnet.robotics
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Date:
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Sun, 3 Jan 1999 00:55:52 GMT
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Original-From:
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John A. Tamplin <jat@Traveller#nomorespam#.COM>
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Viewed:
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1372 times
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On Sat, 2 Jan 1999, Allen Martin wrote:
> > One problem I noticed with LegOS is that it does not zero the .bss
> > section, which I believe contains uninitialized global data.
>
> .bss also contains global data initialized to 0, which is even worse if it's
> not cleared.
Good point, I will add the code to clear it to my crt0.s before calling
constructors:
mov.w #__bss,r2
mov.w #__end,r3
sub.b r0l,r0l
cmp.w r3,r2
bhs .Lbss_done
.Lmore_bss:
mov.b r0l,@r2
adds #1,r2
cmp.w r3,r2
blo .Lmore_bss
.Lbss_done:
...
John A. Tamplin Traveller Information Services
jat@Traveller.COM 2104 West Ferry Way
256/705-7007 - FAX 256/705-7100 Huntsville, AL 35801
--
Did you check the web site first?: http://www.crynwr.com/lego-robotics
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