Module Name: src
Committed By: maxv
Date: Mon Jul 9 18:52:04 UTC 2018
Modified Files:
src/sys/arch/amd64/amd64: locore.S
Log Message:
Don't push/pop %rdx, we don't care about preserving its value.
To generate a diff of this commit:
cvs rdiff -u -r1.168 -r1.169 src/sys/arch/amd64/amd64/locore.S
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/arch/amd64/amd64/locore.S
diff -u src/sys/arch/amd64/amd64/locore.S:1.168 src/sys/arch/amd64/amd64/locore.S:1.169
--- src/sys/arch/amd64/amd64/locore.S:1.168 Mon Jul 9 18:43:05 2018
+++ src/sys/arch/amd64/amd64/locore.S Mon Jul 9 18:52:04 2018
@@ -1,4 +1,4 @@
-/* $NetBSD: locore.S,v 1.168 2018/07/09 18:43:05 maxv Exp $ */
+/* $NetBSD: locore.S,v 1.169 2018/07/09 18:52:04 maxv Exp $ */
/*
* Copyright-o-rama!
@@ -1105,21 +1105,17 @@ ENTRY(cpu_switchto)
jnz .Lswitch_return
#ifdef SVS
- pushq %rdx
movb _C_LABEL(svs_enabled),%dl
testb %dl,%dl
jz .Lskip_svs
callq _C_LABEL(svs_lwp_switch)
.Lskip_svs:
- popq %rdx
#endif
#ifndef XEN
- pushq %rdx
movq %r13,%rdi
movq %r12,%rsi
callq _C_LABEL(speculation_barrier)
- popq %rdx
#endif
/* Switch ring0 stack */
@@ -1147,7 +1143,6 @@ ENTRY(cpu_switchto)
.Lring0_switched:
#ifndef XEN
- pushq %rdx
movb _C_LABEL(x86_fpu_eager),%dl
testb %dl,%dl
jz .Lno_eagerfpu
@@ -1155,7 +1150,6 @@ ENTRY(cpu_switchto)
movq %r12,%rsi
callq _C_LABEL(fpu_eagerswitch)
.Lno_eagerfpu:
- popq %rdx
#endif
/* Don't bother with the rest if switching to a system process. */
