android_kernel_xiaomi_sm8350/arch/sh/lib
Stuart MENEFY 5d52013cbb sh: __copy_user function can corrupt the stack in case of exception
The __copy_user function can corrupt the stack in the case of a
non-trivial length of data, and either of the first two move instructions
cause an exception. This is because the fixup for these two instructions
is mapped to the no_pop case, but these instructions execute after the
stack is pushed.

This change creates an explicit NO_POP exception mapping macro, and uses
it for the two instructions executed in the trivial case where no stack
pushes occur.

More information at ST Linux bugzilla:

	https://bugzilla.stlinux.com/show_bug.cgi?id=4824

Signed-off-by: Dylan Reid <dylan_reid@bose.com>
Signed-off-by: Stuart Menefy <stuart.menefy@st.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-11-13 17:40:30 +09:00
..
checksum.S
clear_page.S
copy_page.S sh: __copy_user function can corrupt the stack in case of exception 2008-11-13 17:40:30 +09:00
delay.c
div64-generic.c sh: fixup many sparse errors. 2008-09-08 10:35:04 +09:00
div64.S
io.c sh: Fix up the __raw_read/writeX() definitions. 2008-10-01 15:12:27 +09:00
Makefile
memchr.S
memcpy-sh4.S
memcpy.S
memmove.S
memset.S
strlen.S