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linux/arch/arm/lib
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Ard Biesheuvel ad3d09b547 ARM: memset: clean up unwind annotations 
The memset implementation carves up the code in different sections, each
covered with their own unwind info. In this case, it is done in a way
similar to how the compiler might do it, to disambiguate between parts
where the return address is in LR and the SP is unmodified, and parts
where a stack frame is live, and the unwinder needs to know the size of
the stack frame and the location of the return address within it.

Only the placement of the unwind directives is slightly odd: the stack
pushes are placed in the wrong sections, which may confuse the unwinder
when attempting to unwind with PC pointing at the stack push in
question.

So let's fix this up, by reordering the directives and instructions as
appropriate.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Tested-by: Keith Packard <keithpac@amazon.com>
Tested-by: Marc Zyngier <maz@kernel.org>
Tested-by: Vladimir Murzin <vladimir.murzin@arm.com> # ARMv7M
2021-12-03 15:11:32 +01:00
..
ashldi3.S Revert "arm: move exports to definitions" 2016-11-23 10:00:03 +00:00
ashrdi3.S Revert "arm: move exports to definitions" 2016-11-23 10:00:03 +00:00
backtrace-clang.S ARM: implement IRQ stacks 2021-12-03 15:11:31 +01:00
backtrace.S ARM: implement IRQ stacks 2021-12-03 15:11:31 +01:00
bitops.h ARM: 8843/1: use unified assembler in headers 2019-02-26 11:26:06 +00:00
bswapsdi2.S License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
call_with_stack.S ARM: call_with_stack: add unwind support 2021-12-03 15:11:32 +01:00
changebit.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
clear_user.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
clearbit.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
copy_from_user.S ARM: memcpy: use frame pointer as unwind anchor 2021-12-03 15:11:32 +01:00
copy_page.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
copy_template.S ARM: memcpy: use frame pointer as unwind anchor 2021-12-03 15:11:32 +01:00
copy_to_user.S ARM: memcpy: use frame pointer as unwind anchor 2021-12-03 15:11:32 +01:00
csumipv6.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
csumpartial.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
csumpartialcopy.S arm: propagate the calling convention changes down to csum_partial_copy_from_user() 2020-08-20 15:45:16 -04:00
csumpartialcopygeneric.S arm: propagate the calling convention changes down to csum_partial_copy_from_user() 2020-08-20 15:45:16 -04:00
csumpartialcopyuser.S arm: propagate the calling convention changes down to csum_partial_copy_from_user() 2020-08-20 15:45:16 -04:00
delay-loop.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
delay.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 333 2019-06-05 17:37:06 +02:00
div64.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
findbit.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
getuser.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
io-readsb.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
io-readsl.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
io-readsw-armv3.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
io-readsw-armv4.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
io-writesb.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
io-writesl.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
io-writesw-armv3.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
io-writesw-armv4.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
lib1funcs.S ARM: 8844/1: use unified assembler in assembly files 2019-02-26 11:26:07 +00:00
lshrdi3.S Revert "arm: move exports to definitions" 2016-11-23 10:00:03 +00:00
Makefile ARM: 8900/1: UNWINDER_FRAME_POINTER implementation for Clang 2019-08-29 07:58:01 +01:00
memchr.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
memcpy.S ARM: memcpy: use frame pointer as unwind anchor 2021-12-03 15:11:32 +01:00
memmove.S ARM: memmove: use frame pointer as unwind anchor 2021-12-03 15:11:32 +01:00
memset.S ARM: memset: clean up unwind annotations 2021-12-03 15:11:32 +01:00
muldi3.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
putuser.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
setbit.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
strchr.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
strrchr.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
testchangebit.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
testclearbit.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
testsetbit.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
uaccess_with_memcpy.c mmap locking API: use coccinelle to convert mmap_sem rwsem call sites 2020-06-09 09:39:14 -07:00
ucmpdi2.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
xor-neon.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00