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author | Anders Roxell <anders.roxell@linaro.org> | 2022-02-24 17:22:15 +0100 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-04-08 14:40:36 +0200 |
commit | 68fa67e939d81e9886cba00606ea64825abf64dc (patch) | |
tree | 9daa71151002c5633344d6b9f326210b9dc541c4 /arch/powerpc/include/asm/io.h | |
parent | ad806b402268d5891fecbc16e3d6a2e0b64632c9 (diff) |
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: 350779a29f11 ("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>
Diffstat (limited to 'arch/powerpc/include/asm/io.h')
0 files changed, 0 insertions, 0 deletions