Author: mjg
Date: Thu Sep 27 20:48:07 2018
New Revision: 338989
URL: https://svnweb.freebsd.org/changeset/base/338989
Log:
amd64: fix return value of copyinstr after r338970
The function stopped swapping rdi and rsi, but the error handling
code was not updated with the new register name.
Approved by: re (implicit)
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 Sep 27 20:00:07 2018
(r338988)
+++ head/sys/amd64/amd64/support.S Thu Sep 27 20:48:07 2018
(r338989)
@@ -1097,7 +1097,7 @@ copyinstr_toolong_smap:
copyinstr_toolong:
/* rdx is zero - return ENAMETOOLONG or EFAULT */
movq $VM_MAXUSER_ADDRESS,%rax
- cmpq %rax,%rsi
+ cmpq %rax,%rdi
jae cpystrflt
movl $ENAMETOOLONG,%eax
jmp cpystrflt_x
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