Author: mjg
Date: Thu Oct 4 20:01:48 2018
New Revision: 339183
URL: https://svnweb.freebsd.org/changeset/base/339183
Log:
amd64: hide non-erms jump label under non-erms copyin/copyout
This change is a no-op in terms of semantics, but has a side effect
of removing a perfectly useless nop sled for CPUs with ERMS.
Approved by: re (gjb)
Sponsored by: The FreeBSD Foundation
Modified:
head/sys/amd64/amd64/support.S
Modified: head/sys/amd64/amd64/support.S
==============================================================================
--- head/sys/amd64/amd64/support.S Thu Oct 4 19:54:47 2018
(r339182)
+++ head/sys/amd64/amd64/support.S Thu Oct 4 20:01:48 2018
(r339183)
@@ -457,9 +457,9 @@ END(fillw)
movq %rax,PCB_ONFAULT(%r9)
POP_FRAME_POINTER
ret
-.endif
ALIGN_TEXT
1:
+.endif
rep
movsb
@@ -525,9 +525,9 @@ END(copyout_smap_erms)
movq %rax,PCB_ONFAULT(%r9)
POP_FRAME_POINTER
ret
-.endif
ALIGN_TEXT
1:
+.endif
rep
movsb
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