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[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

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Meco Man
2021-09-27 06:51:40 -04:00
parent c8c632512a
commit 86bb54fde6
4 changed files with 46 additions and 2 deletions
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9
components/libc/compilers/dlib/syscall_read.c
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@@ -15,6 +15,10 @@
#include <yfuns.h>
#include "libc.h"
#define DBG_TAG "dlib.syscall_read"
#define DBG_LVL DBG_INFO
#include <rtdbg.h>
#pragma module_name = "?__read"
size_t __read(int handle, unsigned char *buf, size_t len)
{
@@ -25,6 +29,11 @@ size_t __read(int handle, unsigned char *buf, size_t len)
if (handle == _LLIO_STDIN)
{
#ifdef RT_USING_POSIX
if (libc_stdio_get_console() < 0)
{
LOG_E("invoke standard input before initializing libc");
return _LLIO_ERROR;
}
return read(STDIN_FILENO, buf, len);
#else
return _LLIO_ERROR;