Stafford Horne dceaafd668 openrisc: Union fpcsr and oldmask in sigcontext to unbreak userspace ABI ... 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>		2023-07-10 22:03:26 +01:00
..
byteorder.h
elf.h	openrisc: Support floating point user api	2023-04-26 15:08:06 +01:00
Kbuild	treewide: Add SPDX license identifier - Kbuild	2019-05-30 11:32:33 -07:00
param.h	License cleanup: add SPDX license identifier to uapi header files with a license	2017-11-02 11:20:11 +01:00
ptrace.h	openrisc: Support floating point user api	2023-04-26 15:08:06 +01:00
sigcontext.h	openrisc: Union fpcsr and oldmask in sigcontext to unbreak userspace ABI	2023-07-10 22:03:26 +01:00
unistd.h	openrisc: Enable the clone3 syscall	2020-03-02 18:10:52 +09:00