powerpc/64s/syscall: Fix ptrace syscall info with scv syscalls

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commit d72500f992 upstream.

The scv implementation missed updating syscall return value and error
value get/set functions to deal with the changed register ABI. This
broke ptrace PTRACE_GET_SYSCALL_INFO as well as some kernel auditing
and tracing functions.

Fix. tools/testing/selftests/ptrace/get_syscall_info now passes when
scv is used.

Fixes: 7fa95f9ada ("powerpc/64s: system call support for scv/rfscv instructions")
Cc: stable@vger.kernel.org # v5.9+
Reported-by: "Dmitry V. Levin" <ldv@altlinux.org>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Reviewed-by: Dmitry V. Levin <ldv@altlinux.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210520111931.2597127-2-npiggin@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

This commit is contained in:

Nicholas Piggin 2021-05-20 21:19:31 +10:00 • committed by Greg Kroah-Hartman

parent 105345b909

commit 343208ffe9

2 changed files with 52 additions and 35 deletions

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45

arch/powerpc/include/asm/ptrace.h

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42

arch/powerpc/include/asm/syscall.h

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