From 56f3ce8c60a3bdf3a8a96fc3aaad19a0a7e0dbd8 Mon Sep 17 00:00:00 2001
From: shaojinchun <shaojinchun@rt-thread.com>
Date: Sat, 13 Mar 2021 09:48:57 +0800
Subject: [PATCH] add syscall vfork support

---
 components/lwp/arch/arm/cortex-a/lwp_gcc.S | 2 ++
 components/lwp/lwp_syscall.c               | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/components/lwp/arch/arm/cortex-a/lwp_gcc.S b/components/lwp/arch/arm/cortex-a/lwp_gcc.S
index ee91466ef9..452adb7c94 100644
--- a/components/lwp/arch/arm/cortex-a/lwp_gcc.S
+++ b/components/lwp/arch/arm/cortex-a/lwp_gcc.S
@@ -94,8 +94,10 @@ lwp_get_user_sp:
     mov pc, lr
 
 .global sys_fork
+.global sys_vfork
 .global sys_fork_exit
 sys_fork:
+sys_vfork:
     push {r4 - r12, lr}
     bl _sys_fork
 sys_fork_exit:
diff --git a/components/lwp/lwp_syscall.c b/components/lwp/lwp_syscall.c
index 85665d38a7..e8791e77bc 100644
--- a/components/lwp/lwp_syscall.c
+++ b/components/lwp/lwp_syscall.c
@@ -1436,6 +1436,7 @@ static int lwp_copy_files(struct rt_lwp *dst, struct rt_lwp *src)
 }
 
 int sys_fork(void);
+int sys_vfork(void);
 void sys_fork_exit(void);
 int _sys_fork(void)
 {
@@ -3203,6 +3204,7 @@ const static void* func_table[] =
     (void *)sys_rename,			/* 135 */
     (void *)sys_fork,
     (void *)sys_execve,
+    (void *)sys_vfork,
 };
 
 const void *lwp_get_sys_api(rt_uint32_t number)
-- 
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