Skip to main content

Browse the archive

https://github.com/torvalds/linux
29 July 2024, 15:18:00 UTC
Revision 9aed02feae57bf7a40cb04ea0e3017cb7a998db4 authored by Vineet Gupta on 27 January 2017, 18:45:27 UTC, committed by Vineet Gupta on 27 January 2017, 18:54:20 UTC 
ARC: [arcompact] handle unaligned access delay slot corner case
 
After emulating an unaligned access in delay slot of a branch, we
pretend as the delay slot never happened - so return back to actual
branch target (or next PC if branch was not taken).

Curently we did this by handling STATUS32.DE, we also need to clear the
BTA.T bit, which is disregarded when returning from original misaligned
exception, but could cause weirdness if it took the interrupt return
path (in case interrupt was acive too)

One ARC700 customer ran into this when enabling unaligned access fixup
for kernel mode accesses as well

Cc: stable@vger.kernel.org
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
1 parent 78f824d
History
Tip revision: 9aed02feae57bf7a40cb04ea0e3017cb7a998db4 authored by Vineet Gupta on 27 January 2017, 18:45:27 UTC
ARC: [arcompact] handle unaligned access delay slot corner case
Tip revision: 9aed02f
File Mode Size
Documentation
arch
block
certs
crypto
drivers
firmware
fs
include
init
ipc
kernel
lib
mm
net
samples
scripts
security
sound
tools
usr
virt
.cocciconfig -rw-r--r-- 59 bytes
.get_maintainer.ignore -rw-r--r-- 31 bytes
.gitattributes -rw-r--r-- 30 bytes
.gitignore -rw-r--r-- 1.3 KB
.mailmap -rw-r--r-- 7.7 KB
COPYING -rw-r--r-- 18.3 KB
CREDITS -rw-r--r-- 96.0 KB
Kbuild -rw-r--r-- 2.8 KB
Kconfig -rw-r--r-- 252 bytes
MAINTAINERS -rw-r--r-- 382.5 KB
Makefile -rw-r--r-- 57.6 KB
README -rw-r--r-- 722 bytes

README

back to top