Amit Gandhi
t
Fork of
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by 
mbed official
Diff: platform/mbed_retarget.cpp
- Revision:
- 160:d5399cc887bb
- Child:
- 163:74e0ce7f98e8
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/platform/mbed_retarget.cpp Tue Mar 14 16:40:56 2017 +0000
@@ -0,0 +1,1048 @@
+/* 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/platform.h"
+#include "drivers/FilePath.h"
+#include "hal/serial_api.h"
+#include "platform/mbed_toolchain.h"
+#include "platform/mbed_semihost_api.h"
+#include "platform/mbed_interface.h"
+#include "platform/SingletonPtr.h"
+#include "platform/PlatformMutex.h"
+#include "platform/mbed_error.h"
+#include "platform/mbed_stats.h"
+#if MBED_CONF_FILESYSTEM_PRESENT
+#include "filesystem/FileSystem.h"
+#include "filesystem/File.h"
+#include "filesystem/Dir.h"
+#endif
+#include <stdlib.h>
+#include <string.h>
+#if DEVICE_STDIO_MESSAGES
+#include <stdio.h>
+#endif
+#include <errno.h>
+#include "platform/mbed_retarget.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/syslimits.h>
+# define PREFIX(x) x
+#endif
+
+#define FILE_HANDLE_RESERVED 0xFFFFFFFF
+
+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
+
+// Heap limits - only used if set
+unsigned char *mbed_heap_start = 0;
+uint32_t mbed_heap_size = 0;
+
+/* 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 FileLike *filehandles[OPEN_MAX];
+static SingletonPtr<PlatformMutex> filehandle_mutex;
+
+namespace mbed {
+void remove_filehandle(FileLike *file) {
+ filehandle_mutex->lock();
+ /* Remove all open filehandles for this */
+ for (unsigned int fh_i = 0; fh_i < sizeof(filehandles)/sizeof(*filehandles); fh_i++) {
+ if (filehandles[fh_i] == file) {
+ filehandles[fh_i] = NULL;
+ }
+ }
+ filehandle_mutex->unlock();
+}
+}
+
+#if DEVICE_SERIAL
+extern int stdio_uart_inited;
+extern serial_t stdio_uart;
+#if MBED_CONF_PLATFORM_STDIO_CONVERT_NEWLINES
+static char stdio_in_prev;
+static char stdio_out_prev;
+#endif
+#endif
+
+static void init_serial() {
+#if DEVICE_SERIAL
+ if (stdio_uart_inited) return;
+ serial_init(&stdio_uart, STDIO_UART_TX, STDIO_UART_RX);
+#if MBED_CONF_PLATFORM_STDIO_BAUD_RATE
+ serial_baud(&stdio_uart, MBED_CONF_PLATFORM_STDIO_BAUD_RATE);
+#endif
+#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;
+#elif defined(TOOLCHAIN_GCC)
+ posix &= ~O_BINARY;
+#endif
+ return posix;
+}
+
+extern "C" WEAK void mbed_sdk_init(void);
+extern "C" WEAK void mbed_sdk_init(void) {
+}
+
+#if MBED_CONF_FILESYSTEM_PRESENT
+// Internally used file objects with managed memory on close
+class ManagedFile : public File {
+public:
+ virtual int close() {
+ int err = File::close();
+ delete this;
+ return err;
+ }
+};
+
+class ManagedDir : public Dir {
+public:
+ virtual int close() {
+ int err = Dir::close();
+ delete this;
+ return err;
+ }
+};
+#endif
+
+/* @brief standard c library fopen() retargeting function.
+ *
+ * This function is invoked by the standard c library retargeting to handle fopen()
+ *
+ * @return
+ * On success, a valid FILEHANDLE is returned.
+ * On failure, -1 is returned and errno is set to an appropriate value e.g.
+ * EBADF a bad file descriptor was found (default errno setting)
+ * EMFILE the maximum number of open files was exceeded.
+ *
+ * */
+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;
+ static int mbed_sdk_inited = 0;
+ if (!mbed_sdk_inited) {
+ mbed_sdk_inited = 1;
+ mbed_sdk_init();
+ }
+ 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
+
+ /* if something goes wrong and errno is not explicly set, errno will be set to EBADF */
+ errno = EBADF;
+
+ // find the first empty slot in filehandles
+ filehandle_mutex->lock();
+ unsigned int fh_i;
+ for (fh_i = 0; fh_i < sizeof(filehandles)/sizeof(*filehandles); fh_i++) {
+ /* Take a next free filehandle slot available. */
+ if (filehandles[fh_i] == NULL) break;
+ }
+ if (fh_i >= sizeof(filehandles)/sizeof(*filehandles)) {
+ /* Too many file handles have been opened */
+ errno = EMFILE;
+ filehandle_mutex->unlock();
+ return -1;
+ }
+ filehandles[fh_i] = (FileLike*)FILE_HANDLE_RESERVED;
+ filehandle_mutex->unlock();
+
+ FileLike *res = NULL;
+
+ /* FILENAME: ":0x12345678" describes a FileLike* */
+ if (name[0] == ':') {
+ void *p;
+ sscanf(name, ":%p", &p);
+ res = (FileLike*)p;
+
+ /* FILENAME: "/file_system/file_name" */
+ } else {
+ FilePath path(name);
+
+ if (!path.exists()) {
+ /* The first part of the filename (between first 2 '/') is not a
+ * registered mount point in the namespace.
+ * Free file handle.
+ */
+ filehandles[fh_i] = NULL;
+ errno = ENOENT;
+ return -1;
+ } else if (path.isFile()) {
+ res = path.file();
+#if MBED_CONF_FILESYSTEM_PRESENT
+ } else {
+ FileSystem *fs = path.fileSystem();
+ if (fs == NULL) {
+ /* The filesystem instance managing the namespace under the mount point
+ * has not been found. Free file handle */
+ errno = ENOENT;
+ filehandles[fh_i] = NULL;
+ return -1;
+ }
+ int posix_mode = openmode_to_posix(openmode);
+ File *file = new ManagedFile;
+ int err = file->open(fs, path.fileName(), posix_mode);
+ if (err < 0) {
+ errno = -err;
+ delete file;
+ } else {
+ res = file;
+ }
+#endif
+ }
+ }
+
+ if (res == NULL) {
+ // Free file handle
+ filehandles[fh_i] = 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;
+
+ errno = EBADF;
+ FileLike* fhc = filehandles[fh-3];
+ filehandles[fh-3] = NULL;
+ if (fhc == NULL) return -1;
+
+ int err = fhc->close();
+ if (err < 0) {
+ errno = -err;
+ return -1;
+ } else {
+ return 0;
+ }
+}
+
+#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
+
+ errno = EBADF;
+ if (fh < 3) {
+#if DEVICE_SERIAL
+ if (!stdio_uart_inited) init_serial();
+#if MBED_CONF_PLATFORM_STDIO_CONVERT_NEWLINES
+ for (unsigned int i = 0; i < length; i++) {
+ if (buffer[i] == '\n' && stdio_out_prev != '\r') {
+ serial_putc(&stdio_uart, '\r');
+ }
+ serial_putc(&stdio_uart, buffer[i]);
+ stdio_out_prev = buffer[i];
+ }
+#else
+ for (unsigned int i = 0; i < length; i++) {
+ serial_putc(&stdio_uart, buffer[i]);
+ }
+#endif
+#endif
+ n = length;
+ } else {
+ FileLike* fhc = filehandles[fh-3];
+ if (fhc == NULL) return -1;
+
+ n = fhc->write(buffer, length);
+ if (n < 0) {
+ errno = -n;
+ }
+ }
+#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
+
+ errno = EBADF;
+ if (fh < 3) {
+ // only read a character at a time from stdin
+#if DEVICE_SERIAL
+ if (!stdio_uart_inited) init_serial();
+#if MBED_CONF_PLATFORM_STDIO_CONVERT_NEWLINES
+ while (true) {
+ char c = serial_getc(&stdio_uart);
+ if ((c == '\r' && stdio_in_prev != '\n') ||
+ (c == '\n' && stdio_in_prev != '\r')) {
+ stdio_in_prev = c;
+ *buffer = '\n';
+ break;
+ } else if ((c == '\r' && stdio_in_prev == '\n') ||
+ (c == '\n' && stdio_in_prev == '\r')) {
+ stdio_in_prev = c;
+ // onto next character
+ continue;
+ } else {
+ stdio_in_prev = c;
+ *buffer = c;
+ break;
+ }
+ }
+#else
+ *buffer = serial_getc(&stdio_uart);
+#endif
+#endif
+ n = 1;
+ } else {
+ FileLike* fhc = filehandles[fh-3];
+ if (fhc == NULL) return -1;
+
+ n = fhc->read(buffer, length);
+ if (n < 0) {
+ errno = -n;
+ }
+ }
+#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
+{
+ errno = EBADF;
+ /* stdin, stdout and stderr should be tty */
+ if (fh < 3) return 1;
+
+ FileLike* fhc = filehandles[fh-3];
+ if (fhc == NULL) return -1;
+
+ int err = fhc->isatty();
+ if (err < 0) {
+ errno = -err;
+ return -1;
+ } else {
+ return 0;
+ }
+}
+
+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
+{
+ errno = EBADF;
+ if (fh < 3) return 0;
+
+ FileLike* fhc = filehandles[fh-3];
+ if (fhc == NULL) return -1;
+
+#if defined(__ARMCC_VERSION)
+ return fhc->seek(position, SEEK_SET);
+#else
+ return fhc->seek(offset, whence);
+#endif
+}
+
+#ifdef __ARMCC_VERSION
+extern "C" int PREFIX(_ensure)(FILEHANDLE fh) {
+ errno = EBADF;
+ if (fh < 3) return 0;
+
+ FileLike* fhc = filehandles[fh-3];
+ if (fhc == NULL) return -1;
+
+ int err = fhc->sync();
+ if (err < 0) {
+ errno = -err;
+ return -1;
+ } else {
+ return 0;
+ }
+}
+
+extern "C" long PREFIX(_flen)(FILEHANDLE fh) {
+ errno = EBADF;
+ if (fh < 3) return 0;
+
+ FileLike* fhc = filehandles[fh-3];
+ if (fhc == NULL) return -1;
+
+ return fhc->size();
+}
+#endif
+
+
+#if !defined(__ARMCC_VERSION) && !defined(__ICCARM__)
+extern "C" int _fstat(int fd, struct stat *st) {
+ if (fd < 3) {
+ st->st_mode = S_IFCHR;
+ return 0;
+ }
+ errno = EBADF;
+ return -1;
+}
+#endif
+
+namespace std {
+extern "C" int remove(const char *path) {
+#if MBED_CONF_FILESYSTEM_PRESENT
+ errno = EBADF;
+ FilePath fp(path);
+ FileSystem *fs = fp.fileSystem();
+ if (fs == NULL) return -1;
+
+ int err = fs->remove(fp.fileName());
+ if (err < 0) {
+ errno = -err;
+ return -1;
+ } else {
+ return 0;
+ }
+#else
+ errno = ENOSYS;
+ return -1;
+#endif
+}
+
+extern "C" int rename(const char *oldname, const char *newname) {
+#if MBED_CONF_FILESYSTEM_PRESENT
+ errno = EBADF;
+ FilePath fpOld(oldname);
+ FilePath fpNew(newname);
+ FileSystem *fsOld = fpOld.fileSystem();
+ FileSystem *fsNew = fpNew.fileSystem();
+
+ /* rename only if both files are on the same FS */
+ if (fsOld != fsNew || fsOld == NULL) return -1;
+
+ int err = fsOld->rename(fpOld.fileName(), fpNew.fileName());
+ if (err < 0) {
+ errno = -err;
+ return -1;
+ } else {
+ return 0;
+ }
+#else
+ errno = ENOSYS;
+ return -1;
+#endif
+}
+
+extern "C" char *tmpnam(char *s) {
+ errno = EBADF;
+ return NULL;
+}
+
+extern "C" FILE *tmpfile() {
+ errno = EBADF;
+ 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) {
+#if MBED_CONF_FILESYSTEM_PRESENT
+ errno = EBADF;
+
+ FilePath fp(path);
+ FileSystem* fs = fp.fileSystem();
+ if (fs == NULL) return NULL;
+
+ Dir *dir = new ManagedDir;
+ int err = dir->open(fs, fp.fileName());
+ if (err < 0) {
+ errno = -err;
+ delete dir;
+ dir = NULL;
+ }
+
+ return dir;
+#else
+ errno = ENOSYS;
+ return 0;
+#endif
+}
+
+extern "C" struct dirent *readdir(DIR *dir) {
+#if MBED_CONF_FILESYSTEM_PRESENT
+ static struct dirent ent;
+ int err = dir->read(&ent);
+ if (err < 1) {
+ if (err < 0) {
+ errno = -err;
+ }
+ return NULL;
+ }
+
+ return &ent;
+#else
+ errno = ENOSYS;
+ return 0;
+#endif
+}
+
+extern "C" int closedir(DIR *dir) {
+#if MBED_CONF_FILESYSTEM_PRESENT
+ int err = dir->close();
+ if (err < 0) {
+ errno = -err;
+ return -1;
+ } else {
+ return 0;
+ }
+#else
+ errno = ENOSYS;
+ return -1;
+#endif
+}
+
+extern "C" void rewinddir(DIR *dir) {
+#if MBED_CONF_FILESYSTEM_PRESENT
+ dir->rewind();
+#else
+ errno = ENOSYS;
+#endif
+}
+
+extern "C" off_t telldir(DIR *dir) {
+#if MBED_CONF_FILESYSTEM_PRESENT
+ return dir->tell();
+#else
+ errno = ENOSYS;
+ return 0;
+#endif
+}
+
+extern "C" void seekdir(DIR *dir, off_t off) {
+#if MBED_CONF_FILESYSTEM_PRESENT
+ dir->seek(off);
+#else
+ errno = ENOSYS;
+#endif
+}
+
+extern "C" int mkdir(const char *path, mode_t mode) {
+#if MBED_CONF_FILESYSTEM_PRESENT
+ FilePath fp(path);
+ FileSystem *fs = fp.fileSystem();
+ if (fs == NULL) return -1;
+
+ int err = fs->mkdir(fp.fileName(), mode);
+ if (err < 0) {
+ errno = -err;
+ return -1;
+ } else {
+ return 0;
+ }
+#else
+ errno = ENOSYS;
+ return -1;
+#endif
+}
+
+extern "C" int stat(const char *path, struct stat *st) {
+#if MBED_CONF_FILESYSTEM_PRESENT
+ FilePath fp(path);
+ FileSystem *fs = fp.fileSystem();
+ if (fs == NULL) return -1;
+
+ int err = fs->stat(fp.fileName(), st);
+ if (err < 0) {
+ errno = -err;
+ return -1;
+ } else {
+ return 0;
+ }
+#else
+ errno = ENOSYS;
+ return -1;
+#endif
+}
+
+#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
+
+#if defined(TOOLCHAIN_GCC)
+
+#ifdef FEATURE_UVISOR
+#include "uvisor-lib/uvisor-lib.h"
+#endif/* FEATURE_UVISOR */
+
+
+extern "C" WEAK void software_init_hook_rtos(void)
+{
+ // Do nothing by default.
+}
+
+extern "C" void software_init_hook(void)
+{
+#ifdef FEATURE_UVISOR
+ int return_code;
+
+ return_code = uvisor_lib_init();
+ if (return_code) {
+ mbed_die();
+ }
+#endif/* FEATURE_UVISOR */
+ mbed_sdk_init();
+ software_init_hook_rtos();
+}
+#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) {
+}
+
+#if defined(TOOLCHAIN_ARM)
+extern "C" int $Super$$main(void);
+
+extern "C" int $Sub$$main(void) {
+ mbed_main();
+ return $Super$$main();
+}
+
+extern "C" void _platform_post_stackheap_init (void) {
+ mbed_sdk_init();
+}
+
+#elif defined(TOOLCHAIN_GCC)
+extern "C" int __real_main(void);
+
+extern "C" int __wrap_main(void) {
+ 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_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) || defined(TOOLCHAIN_GCC_CR)
+// 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.
+#if defined(TARGET_NUMAKER_PFM_NUC472) || defined(TARGET_NUMAKER_PFM_M453)
+// Overwrite _sbrk() to support two region model (heap and stack are two distinct regions).
+// __wrap__sbrk() is implemented in:
+// TARGET_NUMAKER_PFM_NUC472 hal/targets/cmsis/TARGET_NUVOTON/TARGET_NUC472/TARGET_NUMAKER_PFM_NUC472/TOOLCHAIN_GCC_ARM/retarget.c
+// TARGET_NUMAKER_PFM_M453 hal/targets/cmsis/TARGET_NUVOTON/TARGET_M451/TARGET_NUMAKER_PFM_M453/TOOLCHAIN_GCC_ARM/retarget.c
+extern "C" void *__wrap__sbrk(int incr);
+extern "C" caddr_t _sbrk(int incr) {
+ return (caddr_t) __wrap__sbrk(incr);
+}
+#else
+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;
+ }
+
+ // Additional heap checking if set
+ if (mbed_heap_size && (new_heap >= mbed_heap_start + mbed_heap_size)) {
+ errno = ENOMEM;
+ return (caddr_t)-1;
+ }
+
+ heap = new_heap;
+ return (caddr_t) prev_heap;
+}
+#endif
+#endif
+
+#if defined(TOOLCHAIN_GCC_ARM) || defined(TOOLCHAIN_GCC_CR)
+extern "C" void _exit(int return_code) {
+#else
+namespace std {
+extern "C" void exit(int return_code) {
+#endif
+
+#if DEVICE_STDIO_MESSAGES
+#if MBED_CONF_PLATFORM_STDIO_FLUSH_AT_EXIT
+ fflush(stdout);
+ fflush(stderr);
+#endif
+#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_CR)
+} //namespace std
+#endif
+
+#if defined(TOOLCHAIN_ARM) || defined(TOOLCHAIN_GCC)
+
+// This series of function disable the registration of global destructors
+// in a dynamic table which will be called when the application exit.
+// In mbed, program never exit properly, it dies.
+// More informations about this topic for ARMCC here:
+// http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.faqs/6449.html
+extern "C" {
+int __aeabi_atexit(void *object, void (*dtor)(void* /*this*/), void *handle) {
+ return 1;
+}
+
+int __cxa_atexit(void (*dtor)(void* /*this*/), void *object, void *handle) {
+ return 1;
+}
+
+void __cxa_finalize(void *handle) {
+}
+
+} // end of extern "C"
+
+#endif
+
+
+#if defined(TOOLCHAIN_GCC)
+
+/*
+ * Depending on how newlib is configured, it is often not enough to define
+ * __aeabi_atexit, __cxa_atexit and __cxa_finalize in order to override the
+ * behavior regarding the registration of handlers with atexit.
+ *
+ * To overcome this limitation, exit and atexit are overriden here.
+ */
+extern "C"{
+
+/**
+ * @brief Retarget of exit for GCC.
+ * @details Unlike the standard version, this function doesn't call any function
+ * registered with atexit before calling _exit.
+ */
+void __wrap_exit(int return_code) {
+ _exit(return_code);
+}
+
+/**
+ * @brief Retarget atexit from GCC.
+ * @details This function will always fail and never register any handler to be
+ * called at exit.
+ */
+int __wrap_atexit(void (*func)()) {
+ return 1;
+}
+
+}
+
+#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
+
+#if defined (__ICCARM__)
+// Stub out locks when an rtos is not present
+extern "C" WEAK void __iar_system_Mtxinit(__iar_Rmtx *mutex) {}
+extern "C" WEAK void __iar_system_Mtxdst(__iar_Rmtx *mutex) {}
+extern "C" WEAK void __iar_system_Mtxlock(__iar_Rmtx *mutex) {}
+extern "C" WEAK void __iar_system_Mtxunlock(__iar_Rmtx *mutex) {}
+extern "C" WEAK void __iar_file_Mtxinit(__iar_Rmtx *mutex) {}
+extern "C" WEAK void __iar_file_Mtxdst(__iar_Rmtx *mutex) {}
+extern "C" WEAK void __iar_file_Mtxlock(__iar_Rmtx *mutex) {}
+extern "C" WEAK void __iar_file_Mtxunlock(__iar_Rmtx *mutex) {}
+#elif defined(__CC_ARM)
+// Do nothing
+#elif defined (__GNUC__)
+struct _reent;
+// Stub out locks when an rtos is not present
+extern "C" WEAK void __rtos_malloc_lock( struct _reent *_r ) {}
+extern "C" WEAK void __rtos_malloc_unlock( struct _reent *_r ) {}
+extern "C" WEAK void __rtos_env_lock( struct _reent *_r ) {}
+extern "C" WEAK void __rtos_env_unlock( struct _reent *_r ) {}
+
+extern "C" void __malloc_lock( struct _reent *_r )
+{
+ __rtos_malloc_lock(_r);
+}
+
+extern "C" void __malloc_unlock( struct _reent *_r )
+{
+ __rtos_malloc_unlock(_r);
+}
+
+extern "C" void __env_lock( struct _reent *_r )
+{
+ __rtos_env_lock(_r);
+}
+
+extern "C" void __env_unlock( struct _reent *_r )
+{
+ __rtos_env_unlock(_r);
+}
+
+#define CXA_GUARD_INIT_DONE (1 << 0)
+#define CXA_GUARD_INIT_IN_PROGRESS (1 << 1)
+#define CXA_GUARD_MASK (CXA_GUARD_INIT_DONE | CXA_GUARD_INIT_IN_PROGRESS)
+
+extern "C" int __cxa_guard_acquire(int *guard_object_p)
+{
+ uint8_t *guard_object = (uint8_t *)guard_object_p;
+ if (CXA_GUARD_INIT_DONE == (*guard_object & CXA_GUARD_MASK)) {
+ return 0;
+ }
+ singleton_lock();
+ if (CXA_GUARD_INIT_DONE == (*guard_object & CXA_GUARD_MASK)) {
+ singleton_unlock();
+ return 0;
+ }
+ MBED_ASSERT(0 == (*guard_object & CXA_GUARD_MASK));
+ *guard_object = *guard_object | CXA_GUARD_INIT_IN_PROGRESS;
+ return 1;
+}
+
+extern "C" void __cxa_guard_release(int *guard_object_p)
+{
+ uint8_t *guard_object = (uint8_t *)guard_object_p;
+ MBED_ASSERT(CXA_GUARD_INIT_IN_PROGRESS == (*guard_object & CXA_GUARD_MASK));
+ *guard_object = (*guard_object & ~CXA_GUARD_MASK) | CXA_GUARD_INIT_DONE;
+ singleton_unlock();
+}
+
+extern "C" void __cxa_guard_abort(int *guard_object_p)
+{
+ uint8_t *guard_object = (uint8_t *)guard_object_p;
+ MBED_ASSERT(CXA_GUARD_INIT_IN_PROGRESS == (*guard_object & CXA_GUARD_MASK));
+ *guard_object = *guard_object & ~CXA_GUARD_INIT_IN_PROGRESS;
+ singleton_unlock();
+}
+
+#endif
+
+void *operator new(std::size_t count)
+{
+ void *buffer = malloc(count);
+ if (NULL == buffer) {
+ error("Operator new out of memory\r\n");
+ }
+ return buffer;
+}
+
+void *operator new[](std::size_t count)
+{
+ void *buffer = malloc(count);
+ if (NULL == buffer) {
+ error("Operator new[] out of memory\r\n");
+ }
+ return buffer;
+}
+
+void operator delete(void *ptr)
+{
+ if (ptr != NULL) {
+ free(ptr);
+ }
+}
+void operator delete[](void *ptr)
+{
+ if (ptr != NULL) {
+ free(ptr);
+ }
+}