Stafford Horne ed60a9c421 openrisc: Union fpcsr and oldmask in sigcontext to unbreak userspace ABI ... [ Upstream commit dceaafd668 ] With commit 27267655c5 ("openrisc: Support floating point user api") I added an entry to the struct sigcontext which caused an unwanted change to the userspace ABI. To fix this we use the previously unused oldmask field space for the floating point fpcsr state. We do this with a union to restore the ABI back to the pre kernel v6.4 ABI and keep API compatibility. This does mean if there is some code somewhere that is setting oldmask in an OpenRISC specific userspace sighandler it would end up setting the floating point register status, but I think it's unlikely as oldmask was never functional before. Fixes: 27267655c5 ("openrisc: Support floating point user api") Reported-by: Szabolcs Nagy <nsz@port70.net> Closes: https://lore.kernel.org/openrisc/20230626213840.GA1236108@port70.net/ Signed-off-by: Stafford Horne <shorne@gmail.com> Signed-off-by: Sasha Levin <sashal@kernel.org>		2023-07-23 13:53:45 +02:00
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boot	kbuild: do not quote string values in include/config/auto.conf	2022-01-08 18:03:57 +09:00
configs	mm, slob: rename CONFIG_SLOB to CONFIG_SLOB_DEPRECATED	2022-12-01 00:09:20 +01:00
include	openrisc: Union fpcsr and oldmask in sigcontext to unbreak userspace ABI	2023-07-23 13:53:45 +02:00
kernel	openrisc: Union fpcsr and oldmask in sigcontext to unbreak userspace ABI	2023-07-23 13:53:45 +02:00
lib	openrisc/delay: Add include to fix symbol not declared warning	2022-05-23 17:15:49 +09:00
mm	mm: always expand the stack with the mmap write lock held	2023-07-01 13:12:40 +02:00
Kbuild	kbuild: use more subdir- for visiting subdirectories while cleaning	2021-10-24 13:49:46 +09:00
Kconfig	openrisc: Add pci bus support	2022-07-30 05:50:15 +09:00
Kconfig.debug	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00
Makefile	kbuild: remove head-y syntax	2022-10-02 18:06:03 +09:00