Merge pull request #5087 from mysterywolf/libc_stdio

[libc标准化][syscall]移除libc_stdio_read/write函数，优化syscall

components/libc/compilers/armlibc/libc.h

@@ -10,17 +10,14 @@
 #ifndef __RTT_LIBC_H__
 #define __RTT_LIBC_H__
 
-#include <stddef.h>
-
 #ifdef __cplusplus
 extern "C" {
 #endif
-int libc_system_init(void);
 
-int libc_stdio_set_console(const char* device_name, int mode);
+int libc_system_init(void);
 int libc_stdio_get_console(void);
-int libc_stdio_read(void* buffer, size_t size);
-int libc_stdio_write(const void* buffer, size_t size);
+int libc_stdio_set_console(const char* device_name, int mode);
+
 #ifdef __cplusplus
 }
 #endif

components/libc/compilers/armlibc/stdio.c

@@ -21,6 +21,7 @@
 #define STDIO_DEVICE_NAME_MAX   32
 
 static int std_fd = -1;
+
 int libc_stdio_set_console(const char* device_name, int mode)
 {
     int fd;
@@ -47,29 +48,4 @@ int libc_stdio_get_console(void)
     return std_fd;
 }
 
-int libc_stdio_read(void *buffer, size_t size)
-{
-    if (std_fd >= 0)
-    {
-        return read(std_fd, buffer, size);
-    }
-    else
-    {
-        rt_kprintf("Illegal stdio input!\n");
-        return 0;
-    }
-}
-
-int libc_stdio_write(const void *buffer, size_t size)
-{
-    if (std_fd >= 0)
-    {
-        return write(std_fd, buffer, size);
-    }
-    else
-    {
-        rt_kprintf("Illegal stdio output!\n");
-        return size;
-    }
-}
 #endif

components/libc/compilers/armlibc/syscalls.c

@@ -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
@@ -146,16 +150,22 @@ int _sys_read(FILEHANDLE fh, unsigned char *buf, unsigned len, int mode)
     if (fh == STDIN)
     {
 #ifdef RT_USING_POSIX
-        size = libc_stdio_read(buf, len);
+        if (libc_stdio_get_console() < 0)
+        {
+            LOG_W("Do not invoke standard output before initializing libc");
+            return 0;
+        }
+        size = read(STDIN_FILENO, buf, len);
         return len - size;
 #else
         /* no stdin */
         return -1;
 #endif
     }
-
-    if ((fh == STDOUT) || (fh == STDERR))
+    else if ((fh == STDOUT) || (fh == STDERR))
+    {
         return -1;
+    }
 
 #ifndef RT_USING_DFS
     return 0;
@@ -185,7 +195,12 @@ int _sys_write(FILEHANDLE fh, const unsigned char *buf, unsigned len, int mode)
         return 0;
 #else
 #ifdef RT_USING_POSIX
-        size = libc_stdio_write(buf, len);
+        if (libc_stdio_get_console() < 0)
+        {
+            LOG_W("Do not invoke standard input before initializing libc");
+            return 0;
+        }
+        size = write(STDOUT_FILENO, buf, len);
         return len - size;
 #else
         if (rt_console_get_device())
@@ -198,8 +213,10 @@ int _sys_write(FILEHANDLE fh, const unsigned char *buf, unsigned len, int mode)
 #endif
 #endif
     }
-
-    if (fh == STDIN) return -1;
+    else if (fh == STDIN)
+    {
+        return -1;
+    }
 
 #ifndef RT_USING_DFS
     return 0;

components/libc/compilers/dlib/libc.h

@@ -11,17 +11,14 @@
 #ifndef __RTT_LIBC_H__
 #define __RTT_LIBC_H__
 
-#include <stddef.h>
-
 #ifdef __cplusplus
 extern "C" {
 #endif
-int libc_system_init(void);
 
-int libc_stdio_set_console(const char* device_name, int mode);
+int libc_system_init(void);
 int libc_stdio_get_console(void);
-int libc_stdio_read(void* buffer, size_t size);
-int libc_stdio_write(const void* buffer, size_t size);
+int libc_stdio_set_console(const char* device_name, int mode);
+
 #ifdef __cplusplus
 }
 #endif

components/libc/compilers/dlib/stdio.c

@@ -46,13 +46,4 @@ int libc_stdio_get_console(void) {
     return std_fd;
 }
 
-int libc_stdio_read(void *buffer, size_t size)
-{
-    return read(std_fd, buffer, size);
-}
-
-int libc_stdio_write(const void *buffer, size_t size)
-{
-    return write(std_fd, buffer, size);
-}
 #endif

components/libc/compilers/dlib/syscall_read.c

@@ -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)
 {
@@ -25,14 +29,20 @@ size_t __read(int handle, unsigned char *buf, size_t len)
     if (handle == _LLIO_STDIN)
     {
 #ifdef RT_USING_POSIX
-        return libc_stdio_read(buf, len);
+        if (libc_stdio_get_console() < 0)
+        {
+            LOG_W("Do not invoke standard input before initializing libc");
+            return 0;
+        }
+        return read(STDIN_FILENO, buf, len);
 #else
         return _LLIO_ERROR;
 #endif
     }
-
-    if ((handle == _LLIO_STDOUT) || (handle == _LLIO_STDERR))
+    else if ((handle == _LLIO_STDOUT) || (handle == _LLIO_STDERR))
+    {
         return _LLIO_ERROR;
+    }
 
 #ifndef RT_USING_DFS
     return _LLIO_ERROR;

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)
@@ -30,19 +34,29 @@ size_t __write(int handle, const unsigned char *buf, size_t len)
 #else
 
 #ifdef RT_USING_POSIX
-        return libc_stdio_write((void*)buf, len);
+        if (libc_stdio_get_console() < 0)
+        {
+            LOG_W("Do not invoke standard output before initializing libc");
+            return 0;
+        }
+        return write(STDOUT_FILENO, (void*)buf, len);
 #else
         rt_device_t console_device;
 
         console_device = rt_console_get_device();
-        if (console_device != 0) rt_device_write(console_device, 0, buf, len);
+        if (console_device != 0)
+        {
+            rt_device_write(console_device, 0, buf, len);
+        }
 
         return len;
 #endif
 #endif
     }
-
-    if (handle == _LLIO_STDIN) return _LLIO_ERROR;
+    else if (handle == _LLIO_STDIN)
+    {
+        return _LLIO_ERROR;
+    }
 
 #ifndef RT_USING_DFS
     return _LLIO_ERROR;

components/libc/compilers/newlib/libc.h

@@ -18,8 +18,8 @@
 extern "C" {
 #endif
 int libc_system_init(void);
-int libc_stdio_set_console(const char* device_name, int mode);
 int libc_stdio_get_console(void);
+int libc_stdio_set_console(const char* device_name, int mode);
 
 #ifdef __cplusplus
 }

components/libc/compilers/newlib/syscalls.c

@@ -11,8 +11,10 @@
  * 2020-02-24     Meco Man     fix bug of _isatty_r()
  */
 
+#include <reent.h>
 #include <rtthread.h>
 #include <stddef.h>
+#include <unistd.h>
 #include <sys/errno.h>
 
 #define DBG_TAG    "newlib.syscalls"
@@ -90,6 +92,10 @@ void __libc_init_array(void)
 #include <dlmodule.h>
 #endif
 
+#define DBG_TAG    "newlib.syscalls"
+#define DBG_LVL    DBG_INFO
+#include <rtdbg.h>
+
 /* Reentrant versions of system calls.  */
 
 #ifndef _REENT_ONLY
@@ -219,7 +225,11 @@ _ssize_t _read_r(struct _reent *ptr, int fd, void *buf, size_t nbytes)
     return -1;
 #else
     _ssize_t rc;
-
+    if (libc_stdio_get_console() < 0 && fd == STDIN_FILENO)
+    {
+        LOG_W("Do not invoke standard input before initializing libc");
+        return 0;
+    }
     rc = read(fd, buf, nbytes);
     return rc;
 #endif
@@ -275,7 +285,7 @@ _ssize_t _write_r(struct _reent *ptr, int fd, const void *buf, size_t nbytes)
 {
 #ifndef RT_USING_DFS
 #if defined(RT_USING_CONSOLE) && defined(RT_USING_DEVICE)
-    if (fileno(stdout) == fd)
+    if (STDOUT_FILENO == fd)
     {
         rt_device_t console;
 
@@ -291,7 +301,11 @@ _ssize_t _write_r(struct _reent *ptr, int fd, const void *buf, size_t nbytes)
 #endif /*RT_USING_DEVICE*/
 #else
     _ssize_t rc;
-
+    if (libc_stdio_get_console() < 0 && fd == STDOUT_FILENO)
+    {
+        LOG_W("Do not invoke standard output before initializing libc");
+        return 0;
+    }
     rc = write(fd, buf, nbytes);
     return rc;
 #endif