Now that we have a new hook ptrace_syscall_enter that can be called from
syscall entry code and it handles PTRACE_SYSEMU in generic code, we
can do some cleanup using the same in syscall_trace_enter.
Further the extra logic to find single stepping PTRACE_SYSEMU_SINGLESTEP
in syscall_slow_exit_work seems unnecessary. Let's remove the same.
Cc: Andy Lutomirski <l...@kernel.org>
Cc: Thomas Gleixner <t...@linutronix.de>
Cc: Ingo Molnar <mi...@redhat.com>
Cc: Borislav Petkov <b...@alien8.de>
Signed-off-by: Sudeep Holla <sudeep.ho...@arm.com>
---
arch/x86/entry/common.c | 12 +++---------
1 file changed, 3 insertions(+), 9 deletions(-)
diff --git a/arch/x86/entry/common.c b/arch/x86/entry/common.c
index 7bc105f47d21..5d7590994964 100644
--- a/arch/x86/entry/common.c
+++ b/arch/x86/entry/common.c
@@ -70,22 +70,16 @@ static long syscall_trace_enter(struct pt_regs *regs)
struct thread_info *ti = current_thread_info();
unsigned long ret = 0;
- bool emulated = false;
u32 work;
if (IS_ENABLED(CONFIG_DEBUG_ENTRY))
BUG_ON(regs != task_pt_regs(current));
- work = READ_ONCE(ti->flags) & _TIF_WORK_SYSCALL_ENTRY;
-
- if (unlikely(work & _TIF_SYSCALL_EMU))
- emulated = true;
-
- if ((emulated || (work & _TIF_SYSCALL_TRACE)) &&
- tracehook_report_syscall_entry(regs))
+ if (unlikely(ptrace_syscall_enter(regs)))
return -1L;
- if (emulated)
+ work = READ_ONCE(ti->flags) & _TIF_WORK_SYSCALL_ENTRY;
+ if ((work & _TIF_SYSCALL_TRACE) && tracehook_report_syscall_entry(regs))
return -1L;
#ifdef CONFIG_SECCOMP
--
2.17.1
