CVS commit: src/sys/arch

["Maxime Villard" <maxv%netbsd.org@localhost>]

Module Name:    src
Committed By:   maxv
Date:           Sat May  4 08:50:39 UTC 2019

Modified Files:
        src/sys/arch/amd64/amd64: copy.S
        src/sys/arch/i386/i386: copy.S

Log Message:
Hum. Fix a potentially catastrophic bug: kcopy() sets DF=1 if the areas
overlap, but doesn't clear it if the copy faults. If this happens, we
return to the caller with DF=1, and each future memory copy will be
backwards.

I wonder if there really are places where kcopy() is called with
overlapping areas.


To generate a diff of this commit:
cvs rdiff -u -r1.32 -r1.33 src/sys/arch/amd64/amd64/copy.S
cvs rdiff -u -r1.30 -r1.31 src/sys/arch/i386/i386/copy.S

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.