Yihui Xiong
initial
Diff: mbed-src/common/retarget.cpp
- Revision:
- 1:9d3b497333c0
- Parent:
- 0:638edba3adf6
--- a/mbed-src/common/retarget.cpp Mon Jan 11 02:32:24 2016 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,569 +0,0 @@
-/* mbed Microcontroller Library
- * Copyright (c) 2006-2015 ARM Limited
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-#include "platform.h"
-#include "FileHandle.h"
-#include "FileSystemLike.h"
-#include "FilePath.h"
-#include "serial_api.h"
-#include "toolchain.h"
-#include "semihost_api.h"
-#include "mbed_interface.h"
-#if DEVICE_STDIO_MESSAGES
-#include <stdio.h>
-#endif
-#include <errno.h>
-
-#if defined(__ARMCC_VERSION)
-# include <rt_sys.h>
-# define PREFIX(x) _sys##x
-# define OPEN_MAX _SYS_OPEN
-# ifdef __MICROLIB
-# pragma import(__use_full_stdio)
-# endif
-
-#elif defined(__ICCARM__)
-# include <yfuns.h>
-# define PREFIX(x) _##x
-# define OPEN_MAX 16
-
-# define STDIN_FILENO 0
-# define STDOUT_FILENO 1
-# define STDERR_FILENO 2
-
-#else
-# include <sys/stat.h>
-# include <sys/unistd.h>
-# include <sys/syslimits.h>
-# define PREFIX(x) x
-#endif
-
-using namespace mbed;
-
-#if defined(__MICROLIB) && (__ARMCC_VERSION>5030000)
-// Before version 5.03, we were using a patched version of microlib with proper names
-extern const char __stdin_name[] = ":tt";
-extern const char __stdout_name[] = ":tt";
-extern const char __stderr_name[] = ":tt";
-
-#else
-extern const char __stdin_name[] = "/stdin";
-extern const char __stdout_name[] = "/stdout";
-extern const char __stderr_name[] = "/stderr";
-#endif
-
-/* newlib has the filehandle field in the FILE struct as a short, so
- * we can't just return a Filehandle* from _open and instead have to
- * put it in a filehandles array and return the index into that array
- * (or rather index+3, as filehandles 0-2 are stdin/out/err).
- */
-static FileHandle *filehandles[OPEN_MAX];
-
-FileHandle::~FileHandle() {
- /* Remove all open filehandles for this */
- for (unsigned int fh_i = 0; fh_i < sizeof(filehandles)/sizeof(*filehandles); fh_i++) {
- if (filehandles[fh_i] == this) {
- filehandles[fh_i] = NULL;
- }
- }
-}
-
-#if DEVICE_SERIAL
-extern int stdio_uart_inited;
-extern serial_t stdio_uart;
-#endif
-
-static void init_serial() {
-#if DEVICE_SERIAL
- if (stdio_uart_inited) return;
- serial_init(&stdio_uart, STDIO_UART_TX, STDIO_UART_RX);
-#endif
-}
-
-static inline int openmode_to_posix(int openmode) {
- int posix = openmode;
-#ifdef __ARMCC_VERSION
- if (openmode & OPEN_PLUS) {
- posix = O_RDWR;
- } else if(openmode & OPEN_W) {
- posix = O_WRONLY;
- } else if(openmode & OPEN_A) {
- posix = O_WRONLY|O_APPEND;
- } else {
- posix = O_RDONLY;
- }
- /* a, w, a+, w+ all create if file does not already exist */
- if (openmode & (OPEN_A|OPEN_W)) {
- posix |= O_CREAT;
- }
- /* w and w+ truncate */
- if (openmode & OPEN_W) {
- posix |= O_TRUNC;
- }
-#elif defined(__ICCARM__)
- switch (openmode & _LLIO_RDWRMASK) {
- case _LLIO_RDONLY: posix = O_RDONLY; break;
- case _LLIO_WRONLY: posix = O_WRONLY; break;
- case _LLIO_RDWR : posix = O_RDWR ; break;
- }
- if (openmode & _LLIO_CREAT ) posix |= O_CREAT;
- if (openmode & _LLIO_APPEND) posix |= O_APPEND;
- if (openmode & _LLIO_TRUNC ) posix |= O_TRUNC;
-#endif
- return posix;
-}
-
-extern "C" FILEHANDLE PREFIX(_open)(const char* name, int openmode) {
- #if defined(__MICROLIB) && (__ARMCC_VERSION>5030000)
- // Before version 5.03, we were using a patched version of microlib with proper names
- // This is the workaround that the microlib author suggested us
- static int n = 0;
- if (!std::strcmp(name, ":tt")) return n++;
-
- #else
- /* Use the posix convention that stdin,out,err are filehandles 0,1,2.
- */
- if (std::strcmp(name, __stdin_name) == 0) {
- init_serial();
- return 0;
- } else if (std::strcmp(name, __stdout_name) == 0) {
- init_serial();
- return 1;
- } else if (std::strcmp(name, __stderr_name) == 0) {
- init_serial();
- return 2;
- }
- #endif
-
- // find the first empty slot in filehandles
- unsigned int fh_i;
- for (fh_i = 0; fh_i < sizeof(filehandles)/sizeof(*filehandles); fh_i++) {
- if (filehandles[fh_i] == NULL) break;
- }
- if (fh_i >= sizeof(filehandles)/sizeof(*filehandles)) {
- return -1;
- }
-
- FileHandle *res;
-
- /* FILENAME: ":0x12345678" describes a FileLike* */
- if (name[0] == ':') {
- void *p;
- sscanf(name, ":%p", &p);
- res = (FileHandle*)p;
-
- /* FILENAME: "/file_system/file_name" */
- } else {
- FilePath path(name);
-
- if (!path.exists())
- return -1;
- else if (path.isFile()) {
- res = path.file();
- } else {
- FileSystemLike *fs = path.fileSystem();
- if (fs == NULL) return -1;
- int posix_mode = openmode_to_posix(openmode);
- res = fs->open(path.fileName(), posix_mode); /* NULL if fails */
- }
- }
-
- if (res == NULL) return -1;
- filehandles[fh_i] = res;
-
- return fh_i + 3; // +3 as filehandles 0-2 are stdin/out/err
-}
-
-extern "C" int PREFIX(_close)(FILEHANDLE fh) {
- if (fh < 3) return 0;
-
- FileHandle* fhc = filehandles[fh-3];
- filehandles[fh-3] = NULL;
- if (fhc == NULL) return -1;
-
- return fhc->close();
-}
-
-#if defined(__ICCARM__)
-extern "C" size_t __write (int fh, const unsigned char *buffer, size_t length) {
-#else
-extern "C" int PREFIX(_write)(FILEHANDLE fh, const unsigned char *buffer, unsigned int length, int mode) {
-#endif
- int n; // n is the number of bytes written
- if (fh < 3) {
-#if DEVICE_SERIAL
- if (!stdio_uart_inited) init_serial();
- for (unsigned int i = 0; i < length; i++) {
- serial_putc(&stdio_uart, buffer[i]);
- }
-#endif
- n = length;
- } else {
- FileHandle* fhc = filehandles[fh-3];
- if (fhc == NULL) return -1;
-
- n = fhc->write(buffer, length);
- }
-#ifdef __ARMCC_VERSION
- return length-n;
-#else
- return n;
-#endif
-}
-
-#if defined(__ICCARM__)
-extern "C" size_t __read (int fh, unsigned char *buffer, size_t length) {
-#else
-extern "C" int PREFIX(_read)(FILEHANDLE fh, unsigned char *buffer, unsigned int length, int mode) {
-#endif
- int n; // n is the number of bytes read
- if (fh < 3) {
- // only read a character at a time from stdin
-#if DEVICE_SERIAL
- if (!stdio_uart_inited) init_serial();
- *buffer = serial_getc(&stdio_uart);
-#endif
- n = 1;
- } else {
- FileHandle* fhc = filehandles[fh-3];
- if (fhc == NULL) return -1;
-
- n = fhc->read(buffer, length);
- }
-#ifdef __ARMCC_VERSION
- return length-n;
-#else
- return n;
-#endif
-}
-
-#ifdef __ARMCC_VERSION
-extern "C" int PREFIX(_istty)(FILEHANDLE fh)
-#else
-extern "C" int _isatty(FILEHANDLE fh)
-#endif
-{
- /* stdin, stdout and stderr should be tty */
- if (fh < 3) return 1;
-
- FileHandle* fhc = filehandles[fh-3];
- if (fhc == NULL) return -1;
-
- return fhc->isatty();
-}
-
-extern "C"
-#if defined(__ARMCC_VERSION)
-int _sys_seek(FILEHANDLE fh, long position)
-#elif defined(__ICCARM__)
-long __lseek(int fh, long offset, int whence)
-#else
-int _lseek(FILEHANDLE fh, int offset, int whence)
-#endif
-{
- if (fh < 3) return 0;
-
- FileHandle* fhc = filehandles[fh-3];
- if (fhc == NULL) return -1;
-
-#if defined(__ARMCC_VERSION)
- return fhc->lseek(position, SEEK_SET);
-#else
- return fhc->lseek(offset, whence);
-#endif
-}
-
-#ifdef __ARMCC_VERSION
-extern "C" int PREFIX(_ensure)(FILEHANDLE fh) {
- if (fh < 3) return 0;
-
- FileHandle* fhc = filehandles[fh-3];
- if (fhc == NULL) return -1;
-
- return fhc->fsync();
-}
-
-extern "C" long PREFIX(_flen)(FILEHANDLE fh) {
- if (fh < 3) return 0;
-
- FileHandle* fhc = filehandles[fh-3];
- if (fhc == NULL) return -1;
-
- return fhc->flen();
-}
-#endif
-
-
-#if !defined(__ARMCC_VERSION) && !defined(__ICCARM__)
-extern "C" int _fstat(int fd, struct stat *st) {
- if ((STDOUT_FILENO == fd) || (STDERR_FILENO == fd) || (STDIN_FILENO == fd)) {
- st->st_mode = S_IFCHR;
- return 0;
- }
-
- errno = EBADF;
- return -1;
-}
-#endif
-
-namespace std {
-extern "C" int remove(const char *path) {
- FilePath fp(path);
- FileSystemLike *fs = fp.fileSystem();
- if (fs == NULL) return -1;
-
- return fs->remove(fp.fileName());
-}
-
-extern "C" int rename(const char *oldname, const char *newname) {
- FilePath fpOld(oldname);
- FilePath fpNew(newname);
- FileSystemLike *fsOld = fpOld.fileSystem();
- FileSystemLike *fsNew = fpNew.fileSystem();
-
- /* rename only if both files are on the same FS */
- if (fsOld != fsNew || fsOld == NULL) return -1;
-
- return fsOld->rename(fpOld.fileName(), fpNew.fileName());
-}
-
-extern "C" char *tmpnam(char *s) {
- return NULL;
-}
-
-extern "C" FILE *tmpfile() {
- return NULL;
-}
-} // namespace std
-
-#ifdef __ARMCC_VERSION
-extern "C" char *_sys_command_string(char *cmd, int len) {
- return NULL;
-}
-#endif
-
-extern "C" DIR *opendir(const char *path) {
- /* root dir is FileSystemLike */
- if (path[0] == '/' && path[1] == 0) {
- return FileSystemLike::opendir();
- }
-
- FilePath fp(path);
- FileSystemLike* fs = fp.fileSystem();
- if (fs == NULL) return NULL;
-
- return fs->opendir(fp.fileName());
-}
-
-extern "C" struct dirent *readdir(DIR *dir) {
- return dir->readdir();
-}
-
-extern "C" int closedir(DIR *dir) {
- return dir->closedir();
-}
-
-extern "C" void rewinddir(DIR *dir) {
- dir->rewinddir();
-}
-
-extern "C" off_t telldir(DIR *dir) {
- return dir->telldir();
-}
-
-extern "C" void seekdir(DIR *dir, off_t off) {
- dir->seekdir(off);
-}
-
-extern "C" int mkdir(const char *path, mode_t mode) {
- FilePath fp(path);
- FileSystemLike *fs = fp.fileSystem();
- if (fs == NULL) return -1;
-
- return fs->mkdir(fp.fileName(), mode);
-}
-
-#if defined(TOOLCHAIN_GCC)
-/* prevents the exception handling name demangling code getting pulled in */
-#include "mbed_error.h"
-namespace __gnu_cxx {
- void __verbose_terminate_handler() {
- error("Exception");
- }
-}
-extern "C" WEAK void __cxa_pure_virtual(void);
-extern "C" WEAK void __cxa_pure_virtual(void) {
- exit(1);
-}
-
-#endif
-
-// ****************************************************************************
-// mbed_main is a function that is called before main()
-// mbed_sdk_init() is also a function that is called before main(), but unlike
-// mbed_main(), it is not meant for user code, but for the SDK itself to perform
-// initializations before main() is called.
-
-extern "C" WEAK void mbed_main(void);
-extern "C" WEAK void mbed_main(void) {
-}
-
-extern "C" WEAK void mbed_sdk_init(void);
-extern "C" WEAK void mbed_sdk_init(void) {
-}
-
-#if defined(TOOLCHAIN_ARM)
-extern "C" int $Super$$main(void);
-
-extern "C" int $Sub$$main(void) {
- mbed_sdk_init();
- mbed_main();
- return $Super$$main();
-}
-#elif defined(TOOLCHAIN_GCC)
-extern "C" int __real_main(void);
-
-extern "C" int __wrap_main(void) {
- mbed_sdk_init();
- mbed_main();
- return __real_main();
-}
-#elif defined(TOOLCHAIN_IAR)
-// IAR doesn't have the $Super/$Sub mechanism of armcc, nor something equivalent
-// to ld's --wrap. It does have a --redirect, but that doesn't help, since redirecting
-// 'main' to another symbol looses the original 'main' symbol. However, its startup
-// code will call a function to setup argc and argv (__iar_argc_argv) if it is defined.
-// Since mbed doesn't use argc/argv, we use this function to call our mbed_main.
-extern "C" void __iar_argc_argv() {
- mbed_sdk_init();
- mbed_main();
-}
-#endif
-
-// Provide implementation of _sbrk (low-level dynamic memory allocation
-// routine) for GCC_ARM which compares new heap pointer with MSP instead of
-// SP. This make it compatible with RTX RTOS thread stacks.
-#if defined(TOOLCHAIN_GCC_ARM)
-// Linker defined symbol used by _sbrk to indicate where heap should start.
-extern "C" int __end__;
-
-#if defined(TARGET_CORTEX_A)
-extern "C" uint32_t __HeapLimit;
-#endif
-
-// Turn off the errno macro and use actual global variable instead.
-#undef errno
-extern "C" int errno;
-
-// For ARM7 only
-register unsigned char * stack_ptr __asm ("sp");
-
-// Dynamic memory allocation related syscall.
-extern "C" caddr_t _sbrk(int incr) {
- static unsigned char* heap = (unsigned char*)&__end__;
- unsigned char* prev_heap = heap;
- unsigned char* new_heap = heap + incr;
-
-#if defined(TARGET_ARM7)
- if (new_heap >= stack_ptr) {
-#elif defined(TARGET_CORTEX_A)
- if (new_heap >= (unsigned char*)&__HeapLimit) { /* __HeapLimit is end of heap section */
-#else
- if (new_heap >= (unsigned char*)__get_MSP()) {
-#endif
- errno = ENOMEM;
- return (caddr_t)-1;
- }
-
- heap = new_heap;
- return (caddr_t) prev_heap;
-}
-#endif
-
-
-#ifdef TOOLCHAIN_GCC_CW
-// TODO: Ideally, we would like to define directly "_ExitProcess"
-extern "C" void mbed_exit(int return_code) {
-#elif defined TOOLCHAIN_GCC_ARM
-extern "C" void _exit(int return_code) {
-#else
-namespace std {
-extern "C" void exit(int return_code) {
-#endif
-
-#if DEVICE_STDIO_MESSAGES
- fflush(stdout);
- fflush(stderr);
-#endif
-
-#if DEVICE_SEMIHOST
- if (mbed_interface_connected()) {
- semihost_exit();
- }
-#endif
- if (return_code) {
- mbed_die();
- }
-
- while (1);
-}
-
-#if !defined(TOOLCHAIN_GCC_ARM) && !defined(TOOLCHAIN_GCC_CW)
-} //namespace std
-#endif
-
-
-namespace mbed {
-
-void mbed_set_unbuffered_stream(FILE *_file) {
-#if defined (__ICCARM__)
- char buf[2];
- std::setvbuf(_file,buf,_IONBF,NULL);
-#else
- setbuf(_file, NULL);
-#endif
-}
-
-int mbed_getc(FILE *_file){
-#if defined (__ICCARM__)
- /*This is only valid for unbuffered streams*/
- int res = std::fgetc(_file);
- if (res>=0){
- _file->_Mode = (unsigned short)(_file->_Mode & ~ 0x1000);/* Unset read mode */
- _file->_Rend = _file->_Wend;
- _file->_Next = _file->_Wend;
- }
- return res;
-#else
- return std::fgetc(_file);
-#endif
-}
-
-char* mbed_gets(char*s, int size, FILE *_file){
-#if defined (__ICCARM__)
- /*This is only valid for unbuffered streams*/
- char *str = fgets(s,size,_file);
- if (str!=NULL){
- _file->_Mode = (unsigned short)(_file->_Mode & ~ 0x1000);/* Unset read mode */
- _file->_Rend = _file->_Wend;
- _file->_Next = _file->_Wend;
- }
- return str;
-#else
- return std::fgets(s,size,_file);
-#endif
-}
-
-} // namespace mbed