Messages in this thread Patch in this message | | | From | guoren@kernel ... | Subject | [PATCH] riscv: Remove unnecessary path for syscall_trace | Date | Mon, 25 May 2020 14:18:26 +0000 |
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From: Guo Ren <guoren@linux.alibaba.com>
Obviously, there is no need to recover a0-a7 in reject path.
Previous modification is from commit af33d243 by Tycho, to fixup seccomp reject syscall code path.
Signed-off-by: Guo Ren <guoren@linux.alibaba.com> Cc: Tycho Andersen <tycho@tycho.ws> Cc: Kees Cook <keescook@chromium.org> Cc: Palmer Dabbelt <palmerdabbelt@google.com> --- arch/riscv/kernel/entry.S | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/arch/riscv/kernel/entry.S b/arch/riscv/kernel/entry.S index 56d071b..ea3444d 100644 --- a/arch/riscv/kernel/entry.S +++ b/arch/riscv/kernel/entry.S @@ -306,7 +306,7 @@ work_resched: handle_syscall_trace_enter: move a0, sp call do_syscall_trace_enter - move t0, a0 + bnez a0, ret_from_syscall_rejected REG_L a0, PT_A0(sp) REG_L a1, PT_A1(sp) REG_L a2, PT_A2(sp) @@ -315,7 +315,6 @@ handle_syscall_trace_enter: REG_L a5, PT_A5(sp) REG_L a6, PT_A6(sp) REG_L a7, PT_A7(sp) - bnez t0, ret_from_syscall_rejected j check_syscall_nr handle_syscall_trace_exit: move a0, sp -- 2.7.4
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