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-rw-r--r--arch/xtensa/kernel/ptrace.c18
1 files changed, 16 insertions, 2 deletions
diff --git a/arch/xtensa/kernel/ptrace.c b/arch/xtensa/kernel/ptrace.c
index b964f0b2d886..145742d70a9f 100644
--- a/arch/xtensa/kernel/ptrace.c
+++ b/arch/xtensa/kernel/ptrace.c
@@ -542,14 +542,28 @@ long arch_ptrace(struct task_struct *child, long request,
return ret;
}
-void do_syscall_trace_enter(struct pt_regs *regs)
+void do_syscall_trace_leave(struct pt_regs *regs);
+int do_syscall_trace_enter(struct pt_regs *regs)
{
+ if (regs->syscall == NO_SYSCALL)
+ regs->areg[2] = -ENOSYS;
+
if (test_thread_flag(TIF_SYSCALL_TRACE) &&
- tracehook_report_syscall_entry(regs))
+ tracehook_report_syscall_entry(regs)) {
+ regs->areg[2] = -ENOSYS;
regs->syscall = NO_SYSCALL;
+ return 0;
+ }
+
+ if (regs->syscall == NO_SYSCALL) {
+ do_syscall_trace_leave(regs);
+ return 0;
+ }
if (test_thread_flag(TIF_SYSCALL_TRACEPOINT))
trace_sys_enter(regs, syscall_get_nr(current, regs));
+
+ return 1;
}
void do_syscall_trace_leave(struct pt_regs *regs)