src/syscall.c File Reference

• customization file for newlib.

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#include <syscall.h>
#include <errno.h>
#include <fcntl.h>
#include <string.h>
#include "startup.h"
#include "time.h"
#include <sys/types.h>
#include <sys/time.h>

Include dependency graph for syscall.c:

Functions
register char *stack_ptr	asm ("SP")
int	_open (const char *file, int flags, int mode)
	Code for open.
int	_close (int fd)
	Close function.
int	_write (int fd, const void *buf, size_t cnt)
	Write function call the device own write.
int	_read (int fd, void *buf, size_t cnt)
	Read function call the device own read.
int	_fstat (int fd, struct stat *pstat)
int	_lseek (int fd, _off_t offset, int whence)
int	_isatty (int file)
void *	_sbrk (int incr)
int	_stat (const char *fname, struct stat *st)
int	_link (const char *existing, const char *new)
int	_unlink (const char *path)
void	_raise (void)
int	_system (const char *s)
int	_rename (const char *oldpath, const char *newpath)
static int	__setup_argv_for_main (int argc)
int	__setup_argv_and_call_main ()
void	_exit (int n)
int	_kill (int n, int m)
int	_getpid (int n)
int	_gettimeofday (struct timeval *tp, void *tzvp)
	The gettimeofday() function shall obtain the current time, expressed as seconds and microseconds since epoch, and store it in the timeval structure pointed to by tp.
Variables
const devoptab_t	console_devoptab
	Console table.
int	errno
const devoptab_t *	devoptab_list []
	Instantiation of the device operation All new devices will be added here.

---

Detailed Description

• customization file for newlib.

Target: TLL6527v1.1 Compiler: GCC

Author:

Rohan Kangralkar

Date:

11/11/2011

LastChange:

Id

syscall.c 1069 2013-02-25 18:19:21Z ovaskevi

---

Function Documentation

int __setup_argv_and_call_main

(

)

static int __setup_argv_for_main

(

int

argc

)

[inline, static]

int _close

(

int

fd

)

Close function.

Parameters:

fd

file descriptor or index to the device opt list

void _exit

(

int

n

)

int _fstat	(	int	fd,
		struct stat *	pstat
	)

Parameters:

	fd
	stat

Returns:

int _getpid

(

int

n

)

int _gettimeofday	(	struct timeval *	tp,
		void *	tzvp
	)

The gettimeofday() function shall obtain the current time, expressed as seconds and microseconds since epoch, and store it in the timeval structure pointed to by tp.

Timezone is not used.

int _isatty

(

int

file

)

Parameters:

file

Returns:

Todo:

check for tty

int _kill	(	int	n,
		int	m
	)

int _link	(	const char *	existing,
		const char *	new
	)

int _lseek	(	int	fd,
		_off_t	offset,
		int	whence
	)

Parameters:

	fd
	offset
	whence

Returns:

int _open	(	const char *	file,
		int	flags,
		int	mode
	)

Code for open.

The standard IO will not be calling open.

Parameters:

	file	file name
	flags	flags for opening the file unused at present
	mode	mode of opening the file unused

Returns:

Todo:

To use mode and flags while opening the files

void _raise

(

void

)

int _read	(	int	fd,
		void *	buf,
		size_t	cnt
	)

Read function call the device own read.

The deviceoptab_list is used as a table and the function is called;

Parameters:

	fd	file descriptor and is an index into the devoptab_list
	buf	buffer to read into
	cnt	size of the buffer

Returns:

number of bytes read

int _rename	(	const char *	oldpath,
		const char *	newpath
	)

void* _sbrk

(

int

incr

)

int _stat	(	const char *	fname,
		struct stat *	st
	)

int _system

(

const char *

s

)

int _unlink

(

const char *

path

)

int _write	(	int	fd,
		const void *	buf,
		size_t	cnt
	)

Write function call the device own write.

The deviceoptab_list is used as a table and the function is called;

Parameters:

	fd	file descriptor and is an index into the devoptab_list
	buf	buffer to write
	cnt	size of the buffer

Returns:

number of bytes written

register char* stack_ptr asm

(

"SP"

)

---

Variable Documentation

const devoptab_t console_devoptab

Console table.

const devoptab_t* devoptab_list[]

Initial value:

 {





    &console_devoptab,
    &console_devoptab,
    &console_devoptab,

   0             
}

Instantiation of the device operation All new devices will be added here.

int errno

---