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Anders Roxell 66632fdd97 powerpc/lib/sstep: Fix build errors with newer binutils 
commit 8219d31effa7be5dbc7ff915d7970672e028c701 upstream.

Building tinyconfig with gcc (Debian 11.2.0-16) and assembler (Debian
2.37.90.20220207) the following build error shows up:

  {standard input}: Assembler messages:
  {standard input}:10576: Error: unrecognized opcode: `stbcx.'
  {standard input}:10680: Error: unrecognized opcode: `lharx'
  {standard input}:10694: Error: unrecognized opcode: `lbarx'

Rework to add assembler directives [1] around the instruction.  The
problem with this might be that we can trick a power6 into
single-stepping through an stbcx. for instance, and it will execute that
in kernel mode.

[1] https://sourceware.org/binutils/docs/as/PowerPC_002dPseudo.html#PowerPC_002dPseudo

Fixes: 350779a29f ("powerpc: Handle most loads and stores in instruction emulation code")
Cc: stable@vger.kernel.org # v4.14+
Co-developed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Anders Roxell <anders.roxell@linaro.org>
Reviewed-by: Segher Boessenkool <segher@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220224162215.3406642-3-anders.roxell@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-04-20 09:08:23 +02:00
..
alloc.c
checksum_32.S
checksum_64.S
checksum_wrappers.c powerpc: Add a framework for user access tracking 2020-11-22 10:00:23 +01:00
code-patching.c powerpc/lib: Add helper to check if offset is within conditional branch range 2021-11-26 11:40:36 +01:00
copy_32.S
copypage_64.S
copypage_power7.S
copyuser_64.S
copyuser_power7.S
crtsavres.S
div64.S
feature-fixups-test.S
feature-fixups.c powerpc/64s: Fix crashes when toggling entry flush barrier 2021-05-22 10:57:39 +02:00
hweight_64.S
ldstfp.S
locks.c
Makefile powerpc/32: Fix boot failure with GCC latent entropy plugin 2022-02-08 18:16:25 +01:00
mem_64.S
memcmp_64.S
memcpy_64.S
memcpy_power7.S
quad.S
rheap.c
sstep.c powerpc/lib/sstep: Fix build errors with newer binutils 2022-04-20 09:08:23 +02:00
string.S powerpc: Fix __clear_user() with KUAP enabled 2020-11-22 10:00:23 +01:00
string_64.S powerpc: Fix __clear_user() with KUAP enabled 2020-11-22 10:00:23 +01:00
test_emulate_step.c
vmx-helper.c
xor_vmx.c
xor_vmx.h
xor_vmx_glue.c