Author: andrew
Date: Wed Oct 14 15:31:42 2020
New Revision: 366706
URL: https://svnweb.freebsd.org/changeset/base/366706
Log:
Remove direct user access from the arm64 copyinstr
These already use the load variant that simulates userspace access.
Remove the macros that enable normal loads and stores from userspace
as they are unneeded.
Sponsored by: Innovate UK
Modified:
head/sys/arm64/arm64/copyinout.S
Modified: head/sys/arm64/arm64/copyinout.S
==============================================================================
--- head/sys/arm64/arm64/copyinout.S Wed Oct 14 15:26:19 2020
(r366705)
+++ head/sys/arm64/arm64/copyinout.S Wed Oct 14 15:31:42 2020
(r366706)
@@ -100,7 +100,6 @@ ENTRY(copyinstr)
adr x6, copyio_fault /* Get the handler address */
SET_FAULT_HANDLER(x6, x7) /* Set the handler */
- ENTER_USER_ACCESS(w6, x7)
ldr x7, =VM_MAXUSER_ADDRESS
1: cmp x0, x7
@@ -113,8 +112,7 @@ ENTRY(copyinstr)
sub x2, x2, #1 /* len-- */
cbnz x2, 1b
-2: EXIT_USER_ACCESS(w6)
- SET_FAULT_HANDLER(xzr, x7) /* Clear the handler */
+2: SET_FAULT_HANDLER(xzr, x7) /* Clear the handler */
3: cbz x3, 4f /* Check if done != NULL */
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