syscalls.c File Reference

Newlib system calls. More...

#include <sys/stat.h>
#include <sys/timeb.h>
#include <sys/times.h>
#include <utime.h>
#include <newlib.h>
#include <unistd.h>
#include <errno.h>
#include <neorv32.h>

Macros
#define	_sbrk   sbrk
#define	_write   write
#define	_close   close
#define	_lseek   lseek
#define	_read   read
#define	_fstat   fstat
#define	_isatty   isatty

Functions
void	unimplemented_syscall ()
int	nanosleep (const struct timespec *rqtp, struct timespec *rmtp)
int	_access (const char *file, int mode)
int	_chdir (const char *path)
int	_chmod (const char *path, mode_t mode)
int	_chown (const char *path, uid_t owner, gid_t group)
int	_close (int file)
int	_execve (const char *name, char *const argv[], char *const env[])
void	_exit (int exit_status)
int	_faccessat (int dirfd, const char *file, int mode, int flags)
int	_fork (void)
int	_fstat (int file, struct stat *st)
int	_fstatat (int dirfd, const char *file, struct stat *st, int flags)
int	_ftime (struct timeb *tp)
char *	_getcwd (char *buf, size_t size)
int	_getpid ()
int	_gettimeofday (struct timeval *tp, void *tzp)
int	_isatty (int file)
int	_kill (int pid, int sig)
int	_link (const char *old_name, const char *new_name)
off_t	_lseek (int file, off_t ptr, int dir)
int	_lstat (const char *file, struct stat *st)
int	_open (const char *name, int flags, int mode)
int	_openat (int dirfd, const char *name, int flags, int mode)
ssize_t	_read (int file, void *ptr, size_t len)
int	_stat (const char *file, struct stat *st)
long	_sysconf (int name)
clock_t	_times (struct tms *buf)
int	_unlink (const char *name)
int	_utime (const char *path, const struct utimbuf *times)
int	_wait (int *status)
ssize_t	_write (int file, const void *ptr, size_t len)
int	_brk (void *addr)
void *	_sbrk (ptrdiff_t incr)

Variables
int	errno
const volatile unsigned int	__crt0_main_exit
char	__heap_start []
char	__heap_end []
static char *	brk = &__heap_start[0]

Detailed Description

Newlib system calls.

Warning

UART0 (if available) is used to read/write console data (STDIN, STDOUT, STDERR, ...).

Note

Original source file: https://github.com/openhwgroup/cv32e40p/blob/master/example_tb/core/custom/syscalls.c

Original license: SOLDERPAD HARDWARE LICENSE version 0.51

More information was derived from: https://interrupt.memfault.com/blog/boostrapping-libc-with-newlib#implementing-newlib