* mips unaligned.c bugfix
@ 2002-09-27 16:26 D.J. Barrow
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From: D.J. Barrow @ 2002-09-27 16:26 UTC (permalink / raw)
To: Kernel Mailing List, Ralf Baechle
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Hi Ralf & others,
I found & fixed kernel bug in unaligned.c which was affecting the iptables code
in little mips32 endian.
The patch is against 2.4.17 on oss.sgi.com & should hopefully apply to the latest
kernel.
The fixes code for I did mips 64 is untested, I had no way to test them unfortunately.
An example of the bug is the bug following sequence of mips instructions
beqz v0,<destaddr>
lw v0,(t3)
say reg t3 points to an unaligned address
In the emulation the v0 register was being loaded & modified before
the computation of the destination address ( which depended on v0 )
this was incorrect so I had to save the updating of the v0 register
until the computation of the destination address was done.
=====
D.J. Barrow Linux kernel developer
eMail: dj_barrow@ariasoft.ie
Home: +353-22-47196.
Work: +353-91-758353
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