rt-thread/components/libc/compilers/newlib/syscalls.c

345 lines
5.6 KiB
C

/*
* Copyright (c) 2006-2018, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2021-02-11 Meco Man remove _gettimeofday_r() and _times_r()
* 2020-02-13 Meco Man re-implement exit() and abort()
* 2020-02-21 Meco Man improve and beautify syscalls
* 2020-02-24 Meco Man fix bug of _isatty_r()
*/
#include <reent.h>
#include <errno.h>
#include <stdio.h>
#include <sys/time.h>
#include <rtthread.h>
#ifdef RT_USING_DFS
#include <dfs_posix.h>
#endif
#ifdef RT_USING_MODULE
#include <dlmodule.h>
#endif
/* Reentrant versions of system calls. */
#ifndef _REENT_ONLY
int *
__errno ()
{
return _rt_errno();
}
#endif
int
_getpid_r(struct _reent *ptr)
{
return 0;
}
int
_close_r(struct _reent *ptr, int fd)
{
#ifndef RT_USING_DFS
/* return "not supported" */
ptr->_errno = ENOTSUP;
return -1;
#else
return close(fd);
#endif
}
int
_execve_r(struct _reent *ptr, const char * name, char *const *argv, char *const *env)
{
/* return "not supported" */
ptr->_errno = ENOTSUP;
return -1;
}
int
_fcntl_r(struct _reent *ptr, int fd, int cmd, int arg)
{
/* return "not supported" */
ptr->_errno = ENOTSUP;
return -1;
}
int
_fork_r(struct _reent *ptr)
{
/* return "not supported" */
ptr->_errno = ENOTSUP;
return -1;
}
int
_fstat_r(struct _reent *ptr, int fd, struct stat *pstat)
{
/* return "not supported" */
ptr->_errno = ENOTSUP;
return -1;
}
int
_isatty_r(struct _reent *ptr, int fd)
{
if (fd >=0 && fd < 3)
{
return 1;
}
else
{
return 0;
}
}
int
_kill_r(struct _reent *ptr, int pid, int sig)
{
/* return "not supported" */
ptr->_errno = ENOTSUP;
return -1;
}
int
_link_r(struct _reent *ptr, const char *old, const char *new)
{
/* return "not supported" */
ptr->_errno = ENOTSUP;
return -1;
}
_off_t
_lseek_r(struct _reent *ptr, int fd, _off_t pos, int whence)
{
#ifndef RT_USING_DFS
/* return "not supported" */
ptr->_errno = ENOTSUP;
return -1;
#else
_off_t rc;
rc = lseek(fd, pos, whence);
return rc;
#endif
}
int
_mkdir_r(struct _reent *ptr, const char *name, int mode)
{
#ifndef RT_USING_DFS
/* return "not supported" */
ptr->_errno = ENOTSUP;
return -1;
#else
int rc;
rc = mkdir(name, mode);
return rc;
#endif
}
int
_open_r(struct _reent *ptr, const char *file, int flags, int mode)
{
#ifndef RT_USING_DFS
/* return "not supported" */
ptr->_errno = ENOTSUP;
return -1;
#else
int rc;
rc = open(file, flags, mode);
return rc;
#endif
}
_ssize_t
_read_r(struct _reent *ptr, int fd, void *buf, size_t nbytes)
{
#ifndef RT_USING_DFS
/* return "not supported" */
ptr->_errno = ENOTSUP;
return -1;
#else
_ssize_t rc;
rc = read(fd, buf, nbytes);
return rc;
#endif
}
int
_rename_r(struct _reent *ptr, const char *old, const char *new)
{
#ifndef RT_USING_DFS
/* return "not supported" */
ptr->_errno = ENOTSUP;
return -1;
#else
int rc;
rc = rename(old, new);
return rc;
#endif
}
void *
_sbrk_r(struct _reent *ptr, ptrdiff_t incr)
{
/* no use this routine to get memory */
return RT_NULL;
}
int
_stat_r(struct _reent *ptr, const char *file, struct stat *pstat)
{
#ifndef RT_USING_DFS
/* return "not supported" */
ptr->_errno = ENOTSUP;
return -1;
#else
int rc;
rc = stat(file, pstat);
return rc;
#endif
}
int
_unlink_r(struct _reent *ptr, const char *file)
{
#ifndef RT_USING_DFS
/* return "not supported" */
ptr->_errno = ENOTSUP;
return -1;
#else
return unlink(file);
#endif
}
int
_wait_r(struct _reent *ptr, int *status)
{
/* return "not supported" */
ptr->_errno = ENOTSUP;
return -1;
}
_ssize_t
_write_r(struct _reent *ptr, int fd, const void *buf, size_t nbytes)
{
#ifndef RT_USING_DFS
#ifdef RT_USING_DEVICE
if (fileno(stdout) == fd)
{
rt_device_t console;
console = rt_console_get_device();
if (console) return rt_device_write(console, -1, buf, nbytes);
}
return 0;
#else
/* return "not supported" */
ptr->_errno = ENOTSUP;
return -1;
#endif /*RT_USING_DEVICE*/
#else
_ssize_t rc;
rc = write(fd, buf, nbytes);
return rc;
#endif
}
/* Memory routine */
void *
_malloc_r (struct _reent *ptr, size_t size)
{
void* result;
result = (void*)rt_malloc (size);
if (result == RT_NULL)
{
ptr->_errno = ENOMEM;
}
return result;
}
void *
_realloc_r (struct _reent *ptr, void *old, size_t newlen)
{
void* result;
result = (void*)rt_realloc (old, newlen);
if (result == RT_NULL)
{
ptr->_errno = ENOMEM;
}
return result;
}
void *_calloc_r (struct _reent *ptr, size_t size, size_t len)
{
void* result;
result = (void*)rt_calloc (size, len);
if (result == RT_NULL)
{
ptr->_errno = ENOMEM;
}
return result;
}
void
_free_r (struct _reent *ptr, void *addr)
{
rt_free (addr);
}
/* for exit() and abort() */
__attribute__ ((noreturn)) void
_exit (int status)
{
extern void __rt_libc_exit(int status);
__rt_libc_exit(status);
while(1);
}
void
_system(const char *s)
{
extern int __rt_libc_system(const char *string);
__rt_libc_system(s);
}
void __libc_init_array(void)
{
/* we not use __libc init_aray to initialize C++ objects */
}
mode_t umask(mode_t mask)
{
return 022;
}
int flock(int fd, int operation)
{
return 0;
}
/*
These functions are implemented and replaced by the 'common/time.c' file
int _gettimeofday_r(struct _reent *ptr, struct timeval *__tp, void *__tzp);
_CLOCK_T_ _times_r(struct _reent *ptr, struct tms *ptms);
*/