--- zzzz-none-000/linux-3.10.107/arch/mips/kernel/scall64-o32.S	2017-06-27 09:49:32.000000000 +0000
+++ vr9-7490-729/linux-3.10.107/arch/mips/kernel/scall64-o32.S	2021-11-10 11:53:54.000000000 +0000
@@ -81,7 +81,7 @@
 	PTR	4b, bad_stack
 	.previous
 
-	li	t1, _TIF_WORK_SYSCALL_ENTRY
+	li	t1, _TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | _TIF_SECCOMP
 	LONG_L	t0, TI_FLAGS($28)	# syscall tracing enabled?
 	and	t0, t1, t0
 	bnez	t0, trace_a_syscall
@@ -112,7 +112,20 @@
 
 	move	s0, t2			# Save syscall pointer
 	move	a0, sp
-	jal	syscall_trace_enter
+	/*
+	 * syscall number is in v0 unless we called syscall(__NR_###)
+	 * where the real syscall number is in a0
+	 * note: NR_syscall is the first O32 syscall but the macro is
+	 * only defined when compiling with -mabi=32 (CONFIG_32BIT)
+	 * therefore __NR_O32_Linux is used (4000)
+	 */
+	addiu	a1, v0,  __NR_O32_Linux
+	bnez	v0, 1f /* __NR_syscall at offset 0 */
+	lw	a1, PT_R4(sp)
+
+1:	jal	syscall_trace_enter
+
+	bltz	v0, 2f			# seccomp failed? Skip syscall
 
 	move	t0, s0
 	RESTORE_STATIC
@@ -136,7 +149,7 @@
 	sd	t1, PT_R0(sp)		# save it for syscall restarting
 1:	sd	v0, PT_R2(sp)		# result
 
-	j	syscall_exit
+2:	j	syscall_exit
 
 /* ------------------------------------------------------------------------ */