From: Joel Sing <joel@sing.id.au>
Date: Mon, 7 Dec 2020 17:21:33 +0000 (+1100)
Subject: runtime: correct sigfwd on openbsd/mips64
X-Git-Tag: go1.16beta1~68
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=9c91cab0da;p=gostls13.git

runtime: correct sigfwd on openbsd/mips64

Position independent code expects that R25 (aka $t9) contains the address of the
called function. As such, use R25 when calling from sigfwd.

Change-Id: I66b2b9bfa1f1bb983c7385eb2eaa19d9cd87d9fb
Reviewed-on: https://go-review.googlesource.com/c/go/+/275893
Trust: Joel Sing <joel@sing.id.au>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
---

diff --git a/src/runtime/sys_openbsd_mips64.s b/src/runtime/sys_openbsd_mips64.s
index 57a5dbd40e..3e4d209081 100644
--- a/src/runtime/sys_openbsd_mips64.s
+++ b/src/runtime/sys_openbsd_mips64.s
@@ -244,8 +244,8 @@ TEXT runtime·sigfwd(SB),NOSPLIT,$0-32
 	MOVW	sig+8(FP), R4
 	MOVV	info+16(FP), R5
 	MOVV	ctx+24(FP), R6
-	MOVV	fn+0(FP), R7
-	CALL	(R7)			// Alignment for ELF ABI?
+	MOVV	fn+0(FP), R25		// Must use R25, needed for PIC code.
+	CALL	(R25)
 	RET
 
 TEXT runtime·sigtramp(SB),NOSPLIT,$192