From a9518dc36925ddca4d13ee46f3e78c46f0f4851a Mon Sep 17 00:00:00 2001
From: Lion Yang <lion@aosc.io>
Date: Tue, 3 Jul 2018 04:58:01 +0800
Subject: [PATCH] seccomp: add swapcontext into @process for ppc32

There are some modern programming languages use userspace context switches
to implement coroutine features. PowerPC (32-bit) needs syscall "swapcontext" to get
contexts or switch between contexts, which is special.

Adding this rule should fix #9485.
---
 src/shared/seccomp-util.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/shared/seccomp-util.c b/src/shared/seccomp-util.c
index c433cb9..ade3c65 100644
--- a/src/shared/seccomp-util.c
+++ b/src/shared/seccomp-util.c
@@ -651,6 +651,7 @@ const SyscallFilterSet syscall_filter_sets[_SYSCALL_FILTER_SET_MAX] = {
                 "rt_sigqueueinfo\0"
                 "rt_tgsigqueueinfo\0"
                 "setns\0"
+                "swapcontext\0" /* Some archs e.g. powerpc32 are using it to do userspace context switches */
                 "tgkill\0"
                 "times\0"
                 "tkill\0"
-- 
2.7.4