Author: kib
Date: Sat May 4 19:40:30 2019
New Revision: 347133
URL: https://svnweb.freebsd.org/changeset/base/347133
Log:
arm64: Properly restore PAN when done with userspace access in casueword.
Approved by: andrew
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Modified:
head/sys/arm64/arm64/support.S
Modified: head/sys/arm64/arm64/support.S
==============================================================================
--- head/sys/arm64/arm64/support.S Sat May 4 19:05:30 2019
(r347132)
+++ head/sys/arm64/arm64/support.S Sat May 4 19:40:30 2019
(r347133)
@@ -64,8 +64,8 @@ ENTRY(casueword32)
b.ne 2f /* Not equal, exit */
stxr w5, w3, [x0] /* Store the new data */
cbnz w5, 1b /* Retry on failure */
- EXIT_USER_ACCESS(w6)
-2: SET_FAULT_HANDLER(xzr, x5) /* Reset the fault handler */
+2: EXIT_USER_ACCESS(w6)
+ SET_FAULT_HANDLER(xzr, x5) /* Reset the fault handler */
str w4, [x2] /* Store the read data */
mov x0, #0 /* Success */
ret /* Return */
@@ -86,8 +86,8 @@ ENTRY(casueword)
b.ne 2f /* Not equal, exit */
stxr w5, x3, [x0] /* Store the new data */
cbnz w5, 1b /* Retry on failure */
- EXIT_USER_ACCESS(w6)
-2: SET_FAULT_HANDLER(xzr, x5) /* Reset the fault handler */
+2: EXIT_USER_ACCESS(w6)
+ SET_FAULT_HANDLER(xzr, x5) /* Reset the fault handler */
str x4, [x2] /* Store the read data */
mov x0, #0 /* Success */
ret /* Return */
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