CVS commit: src/sys/arch/arc/arc

["Izumi Tsutsui" <tsutsui%netbsd.org@localhost>]

Module Name:    src
Committed By:   tsutsui
Date:           Fri May 29 23:02:51 UTC 2020

Modified Files:
        src/sys/arch/arc/arc: arcbios.c

Log Message:
Make sure to preserve MIPS_CURLWP (t8) register from ARC BIOS calls.

Fixes silent hangup right after starting a kernel on my
Express5800/230 R4400 PCI (finally I've repaired its PSU and RTC).
Reviewed by soda@.  Maybe other ARC machines are also affected.

Note GXemul was not affected by this problem because it doesn't
have actual ARC BIOS ROM and emulates ARC functions internally.

Should be pulled up to at least netbsd-9.


To generate a diff of this commit:
cvs rdiff -u -r1.17 -r1.18 src/sys/arch/arc/arc/arcbios.c

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