From: Meng Zhuo <mzh@golangcn.org>
Date: Fri, 19 Feb 2021 06:31:57 +0000 (+0800)
Subject: runtime: fix invalid nil g check for for mips64x
X-Git-Tag: go1.17beta1~1481
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=7764ee5614df2228e03326487af7670c7c5d268a;p=gostls13.git

runtime: fix invalid nil g check for for mips64x

In CL 292109 we removed unnecessary writes to gp.sched.g
but put wrong register to save g (R4 saves pointer to g) on mips64x

Change-Id: I9777846a7b0a46e1af83dcfc73b74649e0dba3c9
Reviewed-on: https://go-review.googlesource.com/c/go/+/293989
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Joel Sing <joel@sing.id.au>
Trust: Meng Zhuo <mzh@golangcn.org>
Run-TryBot: Meng Zhuo <mzh@golangcn.org>
---

diff --git a/src/runtime/asm_mips64x.s b/src/runtime/asm_mips64x.s
index af27b9b555..c123e96a71 100644
--- a/src/runtime/asm_mips64x.s
+++ b/src/runtime/asm_mips64x.s
@@ -98,11 +98,11 @@ TEXT runtime·mstart(SB),NOSPLIT|TOPFRAME,$0
 TEXT runtime·gogo(SB), NOSPLIT|NOFRAME, $0-8
 	MOVV	buf+0(FP), R3
 	MOVV	gobuf_g(R3), R4
-	MOVV	0(R4), R5	// make sure g != nil
+	MOVV	0(R4), R0	// make sure g != nil
 	JMP	gogo<>(SB)
 
 TEXT gogo<>(SB), NOSPLIT|NOFRAME, $0
-	MOVV	R5, g
+	MOVV	R4, g
 	JAL	runtime·save_g(SB)
 
 	MOVV	0(g), R2