PR/53090 CVS commit: src/sys/arch/mips/mips

["Taylor R Campbell" <riastradh%netbsd.org@localhost>]

The following reply was made to PR port-cobalt/53090; it has been noted by GNATS.

From: "Taylor R Campbell" <riastradh%netbsd.org@localhost>
To: gnats-bugs%gnats.NetBSD.org@localhost
Cc: 
Subject: PR/53090 CVS commit: src/sys/arch/mips/mips
Date: Wed, 19 Dec 2018 15:10:46 +0000

 Module Name:	src
 Committed By:	riastradh
 Date:		Wed Dec 19 15:10:46 UTC 2018
 
 Modified Files:
 	src/sys/arch/mips/mips: fp.S
 
 Log Message:
 Load curlwp into a0 to call fpu_save(curlwp), not fpu_save(garbage).
 
 The lwp argument to fpu_save was added by chuq in revision 1.14 of
 mips_fpu.c, but this call was not updated to pass it.  This is the
 correct lwp to pass because we are in the middle of executing a
 kernel-emulated fp instruction, so curlwp must own the fpu state, and
 we are trying to write the fp registers to memory so we can adjust
 them there when ctc1 would fail.
 
 Fixes PR port-cobalt/53090, PR port-sgimips/53791.
 
 
 To generate a diff of this commit:
 cvs rdiff -u -r1.48 -r1.49 src/sys/arch/mips/mips/fp.S
 
 Please note that diffs are not public domain; they are subject to the
 copyright notices on the relevant files.