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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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14
components/libc/compilers/armlibc/syscalls.c
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@@ -25,6 +25,10 @@
#include <dfs_posix.h>
#endif
#define DBG_TAG "armlibc.syscalls"
#define DBG_LVL DBG_INFO
#include <rtdbg.h>
#ifdef __CLANG_ARM
__asm(".global __use_no_semihosting\n\t");
#else
@@ -146,6 +150,11 @@ int _sys_read(FILEHANDLE fh, unsigned char *buf, unsigned len, int mode)
if (fh == STDIN)
{
#ifdef RT_USING_POSIX
if (libc_stdio_get_console() < 0)
{
LOG_E("invoke standard output before initializing libc");
return -1;
}
size = read(STDIN_FILENO, buf, len);
return len - size;
#else
@@ -186,6 +195,11 @@ int _sys_write(FILEHANDLE fh, const unsigned char *buf, unsigned len, int mode)
return 0;
#else
#ifdef RT_USING_POSIX
if (libc_stdio_get_console() < 0)
{
LOG_E("invoke standard input before initializing libc");
return -1;
}
size = write(STDOUT_FILENO, buf, len);
return len - size;
#else