1 /* mbed Microcontroller Library
2 * Copyright (c) 2006-2015 ARM Limited
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 #include "FileHandle.h"
18 #include "FileSystemLike.h"
20 #include "serial_api.h"
21 #include "toolchain.h"
22 #include "semihost_api.h"
23 #include "mbed_interface.h"
24 #if DEVICE_STDIO_MESSAGES
29 #if defined(__ARMCC_VERSION)
31 # define PREFIX(x) _sys##x
32 # define OPEN_MAX _SYS_OPEN
34 # pragma import(__use_full_stdio)
37 #elif defined(__ICCARM__)
39 # define PREFIX(x) _##x
42 # define STDIN_FILENO 0
43 # define STDOUT_FILENO 1
44 # define STDERR_FILENO 2
47 # include <sys/stat.h>
48 # include <sys/unistd.h>
49 # include <sys/syslimits.h>
55 #if defined(__MICROLIB) && (__ARMCC_VERSION>5030000)
56 // Before version 5.03, we were using a patched version of microlib with proper names
57 extern const char __stdin_name[] = ":tt";
58 extern const char __stdout_name[] = ":tt";
59 extern const char __stderr_name[] = ":tt";
62 extern const char __stdin_name[] = "/stdin";
63 extern const char __stdout_name[] = "/stdout";
64 extern const char __stderr_name[] = "/stderr";
67 /* newlib has the filehandle field in the FILE struct as a short, so
68 * we can't just return a Filehandle* from _open and instead have to
69 * put it in a filehandles array and return the index into that array
70 * (or rather index+3, as filehandles 0-2 are stdin/out/err).
72 static FileHandle *filehandles[OPEN_MAX];
74 FileHandle::~FileHandle() {
75 /* Remove all open filehandles for this */
76 for (unsigned int fh_i = 0; fh_i < sizeof(filehandles)/sizeof(*filehandles); fh_i++) {
77 if (filehandles[fh_i] == this) {
78 filehandles[fh_i] = NULL;
84 extern int stdio_uart_inited;
85 extern serial_t stdio_uart;
88 static void init_serial() {
90 if (stdio_uart_inited) return;
91 serial_init(&stdio_uart, STDIO_UART_TX, STDIO_UART_RX);
95 static inline int openmode_to_posix(int openmode) {
97 #ifdef __ARMCC_VERSION
98 if (openmode & OPEN_PLUS) {
100 } else if(openmode & OPEN_W) {
102 } else if(openmode & OPEN_A) {
103 posix = O_WRONLY|O_APPEND;
107 /* a, w, a+, w+ all create if file does not already exist */
108 if (openmode & (OPEN_A|OPEN_W)) {
111 /* w and w+ truncate */
112 if (openmode & OPEN_W) {
115 #elif defined(__ICCARM__)
116 switch (openmode & _LLIO_RDWRMASK) {
117 case _LLIO_RDONLY: posix = O_RDONLY; break;
118 case _LLIO_WRONLY: posix = O_WRONLY; break;
119 case _LLIO_RDWR : posix = O_RDWR ; break;
121 if (openmode & _LLIO_CREAT ) posix |= O_CREAT;
122 if (openmode & _LLIO_APPEND) posix |= O_APPEND;
123 if (openmode & _LLIO_TRUNC ) posix |= O_TRUNC;
128 extern "C" FILEHANDLE PREFIX(_open)(const char* name, int openmode) {
129 #if defined(__MICROLIB) && (__ARMCC_VERSION>5030000)
130 // Before version 5.03, we were using a patched version of microlib with proper names
131 // This is the workaround that the microlib author suggested us
133 if (!std::strcmp(name, ":tt")) return n++;
136 /* Use the posix convention that stdin,out,err are filehandles 0,1,2.
138 if (std::strcmp(name, __stdin_name) == 0) {
141 } else if (std::strcmp(name, __stdout_name) == 0) {
144 } else if (std::strcmp(name, __stderr_name) == 0) {
150 // find the first empty slot in filehandles
152 for (fh_i = 0; fh_i < sizeof(filehandles)/sizeof(*filehandles); fh_i++) {
153 if (filehandles[fh_i] == NULL) break;
155 if (fh_i >= sizeof(filehandles)/sizeof(*filehandles)) {
161 /* FILENAME: ":0x12345678" describes a FileLike* */
162 if (name[0] == ':') {
164 sscanf(name, ":%p", &p);
165 res = (FileHandle*)p;
167 /* FILENAME: "/file_system/file_name" */
173 else if (path.isFile()) {
176 FileSystemLike *fs = path.fileSystem();
177 if (fs == NULL) return -1;
178 int posix_mode = openmode_to_posix(openmode);
179 res = fs->open(path.fileName(), posix_mode); /* NULL if fails */
183 if (res == NULL) return -1;
184 filehandles[fh_i] = res;
186 return fh_i + 3; // +3 as filehandles 0-2 are stdin/out/err
189 extern "C" int PREFIX(_close)(FILEHANDLE fh) {
190 if (fh < 3) return 0;
192 FileHandle* fhc = filehandles[fh-3];
193 filehandles[fh-3] = NULL;
194 if (fhc == NULL) return -1;
199 #if defined(__ICCARM__)
200 extern "C" size_t __write (int fh, const unsigned char *buffer, size_t length) {
202 extern "C" int PREFIX(_write)(FILEHANDLE fh, const unsigned char *buffer, unsigned int length, int mode) {
204 int n; // n is the number of bytes written
207 if (!stdio_uart_inited) init_serial();
208 for (unsigned int i = 0; i < length; i++) {
209 serial_putc(&stdio_uart, buffer[i]);
214 FileHandle* fhc = filehandles[fh-3];
215 if (fhc == NULL) return -1;
217 n = fhc->write(buffer, length);
219 #ifdef __ARMCC_VERSION
226 #if defined(__ICCARM__)
227 extern "C" size_t __read (int fh, unsigned char *buffer, size_t length) {
229 extern "C" int PREFIX(_read)(FILEHANDLE fh, unsigned char *buffer, unsigned int length, int mode) {
231 int n; // n is the number of bytes read
233 // only read a character at a time from stdin
235 if (!stdio_uart_inited) init_serial();
236 *buffer = serial_getc(&stdio_uart);
240 FileHandle* fhc = filehandles[fh-3];
241 if (fhc == NULL) return -1;
243 n = fhc->read(buffer, length);
245 #ifdef __ARMCC_VERSION
252 #ifdef __ARMCC_VERSION
253 extern "C" int PREFIX(_istty)(FILEHANDLE fh)
255 extern "C" int _isatty(FILEHANDLE fh)
258 /* stdin, stdout and stderr should be tty */
259 if (fh < 3) return 1;
261 FileHandle* fhc = filehandles[fh-3];
262 if (fhc == NULL) return -1;
264 return fhc->isatty();
268 #if defined(__ARMCC_VERSION)
269 int _sys_seek(FILEHANDLE fh, long position)
270 #elif defined(__ICCARM__)
271 long __lseek(int fh, long offset, int whence)
273 int _lseek(FILEHANDLE fh, int offset, int whence)
276 if (fh < 3) return 0;
278 FileHandle* fhc = filehandles[fh-3];
279 if (fhc == NULL) return -1;
281 #if defined(__ARMCC_VERSION)
282 return fhc->lseek(position, SEEK_SET);
284 return fhc->lseek(offset, whence);
288 #ifdef __ARMCC_VERSION
289 extern "C" int PREFIX(_ensure)(FILEHANDLE fh) {
290 if (fh < 3) return 0;
292 FileHandle* fhc = filehandles[fh-3];
293 if (fhc == NULL) return -1;
298 extern "C" long PREFIX(_flen)(FILEHANDLE fh) {
299 if (fh < 3) return 0;
301 FileHandle* fhc = filehandles[fh-3];
302 if (fhc == NULL) return -1;
309 #if !defined(__ARMCC_VERSION) && !defined(__ICCARM__)
310 extern "C" int _fstat(int fd, struct stat *st) {
311 if ((STDOUT_FILENO == fd) || (STDERR_FILENO == fd) || (STDIN_FILENO == fd)) {
312 st->st_mode = S_IFCHR;
322 extern "C" int remove(const char *path) {
324 FileSystemLike *fs = fp.fileSystem();
325 if (fs == NULL) return -1;
327 return fs->remove(fp.fileName());
330 extern "C" int rename(const char *oldname, const char *newname) {
331 FilePath fpOld(oldname);
332 FilePath fpNew(newname);
333 FileSystemLike *fsOld = fpOld.fileSystem();
334 FileSystemLike *fsNew = fpNew.fileSystem();
336 /* rename only if both files are on the same FS */
337 if (fsOld != fsNew || fsOld == NULL) return -1;
339 return fsOld->rename(fpOld.fileName(), fpNew.fileName());
342 extern "C" char *tmpnam(char *s) {
346 extern "C" FILE *tmpfile() {
351 #ifdef __ARMCC_VERSION
352 extern "C" char *_sys_command_string(char *cmd, int len) {
357 extern "C" DIR *opendir(const char *path) {
358 /* root dir is FileSystemLike */
359 if (path[0] == '/' && path[1] == 0) {
360 return FileSystemLike::opendir();
364 FileSystemLike* fs = fp.fileSystem();
365 if (fs == NULL) return NULL;
367 return fs->opendir(fp.fileName());
370 extern "C" struct dirent *readdir(DIR *dir) {
371 return dir->readdir();
374 extern "C" int closedir(DIR *dir) {
375 return dir->closedir();
378 extern "C" void rewinddir(DIR *dir) {
382 extern "C" off_t telldir(DIR *dir) {
383 return dir->telldir();
386 extern "C" void seekdir(DIR *dir, off_t off) {
390 extern "C" int mkdir(const char *path, mode_t mode) {
392 FileSystemLike *fs = fp.fileSystem();
393 if (fs == NULL) return -1;
395 return fs->mkdir(fp.fileName(), mode);
398 #if defined(TOOLCHAIN_GCC)
399 /* prevents the exception handling name demangling code getting pulled in */
400 #include "mbed_error.h"
401 namespace __gnu_cxx {
402 void __verbose_terminate_handler() {
406 extern "C" WEAK void __cxa_pure_virtual(void);
407 extern "C" WEAK void __cxa_pure_virtual(void) {
413 // ****************************************************************************
414 // mbed_main is a function that is called before main()
415 // mbed_sdk_init() is also a function that is called before main(), but unlike
416 // mbed_main(), it is not meant for user code, but for the SDK itself to perform
417 // initializations before main() is called.
419 extern "C" WEAK void mbed_main(void);
420 extern "C" WEAK void mbed_main(void) {
423 extern "C" WEAK void mbed_sdk_init(void);
424 extern "C" WEAK void mbed_sdk_init(void) {
427 #if defined(TOOLCHAIN_ARM)
428 extern "C" int $Super$$main(void);
430 extern "C" int $Sub$$main(void) {
433 return $Super$$main();
435 #elif defined(TOOLCHAIN_GCC)
436 extern "C" int __real_main(void);
438 extern "C" int __wrap_main(void) {
441 return __real_main();
443 #elif defined(TOOLCHAIN_IAR)
444 // IAR doesn't have the $Super/$Sub mechanism of armcc, nor something equivalent
445 // to ld's --wrap. It does have a --redirect, but that doesn't help, since redirecting
446 // 'main' to another symbol looses the original 'main' symbol. However, its startup
447 // code will call a function to setup argc and argv (__iar_argc_argv) if it is defined.
448 // Since mbed doesn't use argc/argv, we use this function to call our mbed_main.
449 extern "C" void __iar_argc_argv() {
455 // Provide implementation of _sbrk (low-level dynamic memory allocation
456 // routine) for GCC_ARM which compares new heap pointer with MSP instead of
457 // SP. This make it compatible with RTX RTOS thread stacks.
458 #if defined(TOOLCHAIN_GCC_ARM)
459 // Linker defined symbol used by _sbrk to indicate where heap should start.
460 extern "C" int __end__;
462 #if defined(TARGET_CORTEX_A)
463 extern "C" uint32_t __HeapLimit;
466 // Turn off the errno macro and use actual global variable instead.
468 extern "C" int errno;
471 register unsigned char * stack_ptr __asm ("sp");
473 // Dynamic memory allocation related syscall.
474 extern "C" caddr_t _sbrk(int incr) {
475 static unsigned char* heap = (unsigned char*)&__end__;
476 unsigned char* prev_heap = heap;
477 unsigned char* new_heap = heap + incr;
479 #if defined(TARGET_ARM7)
480 if (new_heap >= stack_ptr) {
481 #elif defined(TARGET_CORTEX_A)
482 if (new_heap >= (unsigned char*)&__HeapLimit) { /* __HeapLimit is end of heap section */
484 if (new_heap >= (unsigned char*)__get_MSP()) {
491 return (caddr_t) prev_heap;
496 #ifdef TOOLCHAIN_GCC_CW
497 // TODO: Ideally, we would like to define directly "_ExitProcess"
498 extern "C" void mbed_exit(int return_code) {
499 #elif defined TOOLCHAIN_GCC_ARM
500 extern "C" void _exit(int return_code) {
503 extern "C" void exit(int return_code) {
506 #if DEVICE_STDIO_MESSAGES
512 if (mbed_interface_connected()) {
523 #if !defined(TOOLCHAIN_GCC_ARM) && !defined(TOOLCHAIN_GCC_CW)
530 void mbed_set_unbuffered_stream(FILE *_file) {
531 #if defined (__ICCARM__)
533 std::setvbuf(_file,buf,_IONBF,NULL);
539 int mbed_getc(FILE *_file){
540 #if defined (__ICCARM__)
541 /*This is only valid for unbuffered streams*/
542 int res = std::fgetc(_file);
544 _file->_Mode = (unsigned short)(_file->_Mode & ~ 0x1000);/* Unset read mode */
545 _file->_Rend = _file->_Wend;
546 _file->_Next = _file->_Wend;
550 return std::fgetc(_file);
554 char* mbed_gets(char*s, int size, FILE *_file){
555 #if defined (__ICCARM__)
556 /*This is only valid for unbuffered streams*/
557 char *str = fgets(s,size,_file);
559 _file->_Mode = (unsigned short)(_file->_Mode & ~ 0x1000);/* Unset read mode */
560 _file->_Rend = _file->_Wend;
561 _file->_Next = _file->_Wend;
565 return std::fgets(s,size,_file);