[libc][syscalls] 在标准输入输出前加校验，反正在libc初始化之前调用printf出问题

1 files changed, 9 insertions, 0 deletions

diff --git a/components/libc/compilers/dlib/syscall_write.c b/components/libc/compilers/dlib/syscall_write.c
index a5462653bf..bd7cc83d99 100644
--- a/components/libc/compilers/dlib/syscall_write.c
+++ b/components/libc/compilers/dlib/syscall_write.c
@@ -15,6 +15,10 @@
 #include <yfuns.h>
 #include "libc.h"
 
+#define DBG_TAG    "dlib.syscall_write"
+#define DBG_LVL    DBG_INFO
+#include <rtdbg.h>
+
 #pragma module_name = "?__write"
 
 size_t __write(int handle, const unsigned char *buf, size_t len)
@@ -30,6 +34,11 @@ size_t __write(int handle, const unsigned char *buf, size_t len)
 #else
 
 #ifdef RT_USING_POSIX
+        if (libc_stdio_get_console() < 0)
+        {
+            LOG_E("invoke standard output before initializing libc");
+            return _LLIO_ERROR;
+        }
         return write(STDOUT_FILENO, (void*)buf, len);
 #else
         rt_device_t console_device;