nes-proj/platform/galileo/newlib-syscalls.c
Michael LeMay 17b855aac9 galileo: Replace non-halting core implementation of assert with the halting one from newlib
This patch modifies the include order to include headers from newlib
ahead of those from the core of Contiki.  The only header file names
that are common between Contiki and newlib are assert.h and config.h,
but the config.h files in Contiki are only located in ports for other
CPUs so they are irrelevant to this patch.  The motivation for this
patch is to cause files that include assert.h to include the one from
newlib that halts when an assertion fails.  The assert implementation
in the core of Contiki does not halt when an assertion fails.

This patch also adds newlib syscall stubs that are required by the
newlib assert implementation and the _exit syscall function that halts
the system.

Finally, this patch updates some other newlib syscall stubs to
properly indicate their status as unsupported syscalls.
2015-12-21 08:06:14 -02:00

175 lines
4.8 KiB
C

/*
* Copyright (C) 2015, Intel Corporation. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/stat.h>
#include <errno.h>
#include "uart.h"
#include "helpers.h"
#define CONSOLE_OUTPUT_DEV QUARK_X1000_UART_1
#define HEAP_MAX_SIZE 2048
static char _heap[HEAP_MAX_SIZE];
static char *prog_break = _heap;
int
_close_r(struct _reent *ptr, int file)
{
/* Stubbed function */
ptr->_errno = ENOTSUP;
return -1;
}
/*---------------------------------------------------------------------------*/
void
_exit(int status)
{
halt();
}
/*---------------------------------------------------------------------------*/
int
_getpid_r(struct _reent *ptr)
{
/* Stubbed function */
ptr->_errno = ENOTSUP;
return -1;
}
/*---------------------------------------------------------------------------*/
int
_isatty_r(struct _reent *ptr, int file)
{
/* Stubbed function */
ptr->_errno = ENOTSUP;
return 0;
}
/*---------------------------------------------------------------------------*/
int
_kill_r(struct _reent *ptr, int pid, int signal)
{
/* Stubbed function */
ptr->_errno = ENOTSUP;
return -1;
}
/*---------------------------------------------------------------------------*/
int
_read_r(struct _reent *ptr, int file, char *buf, int len)
{
/* Stubbed function */
ptr->_errno = ENOTSUP;
return -1;
}
/*---------------------------------------------------------------------------*/
int
_write_r(struct _reent *ptr, int file, const char *buf, int len)
{
int ret;
int i;
switch(file) {
case 0:
ptr->_errno = EBADF;
ret = -1;
break;
case 1:
case 2:
for(i = 0; i < len; i++) {
/* Since file descriptors 1 and 2 (stdout and stderr) are mapped to a
* serial console, we should translate the 'newline' escape sequence
* to 'carriage return' (CR) followed by 'line feed' (LF) ASCII
* characters.
*/
if(buf[i] == '\n') {
quarkX1000_uart_tx(CONSOLE_OUTPUT_DEV, '\r');
}
quarkX1000_uart_tx(CONSOLE_OUTPUT_DEV, buf[i]);
}
ret = len;
break;
default:
/* We don't support any filesystem yet. */
ptr->_errno = ENOTSUP;
ret = -1;
break;
}
return ret;
}
/*---------------------------------------------------------------------------*/
int
_lseek_r(struct _reent *ptr, int file, int p, int dir)
{
/* Stubbed function */
ptr->_errno = ENOTSUP;
return -1;
}
/*---------------------------------------------------------------------------*/
int
_fstat_r(struct _reent *ptr, int file, struct stat *st)
{
/* We don't support the standard input yet so file descriptor 0 is not
* supported by this function. Additionally, we don't have support for
* any filesystem thus file descriptors greater than 2 are not supported
* as well.
*
* We support standard ouput and error (file descriptors 1 and 2) only.
*/
if(file == 0 || file > 2) {
ptr->_errno = ENOTSUP;
return -1;
}
st->st_mode = S_IFCHR;
return 0;
}
/*---------------------------------------------------------------------------*/
caddr_t
_sbrk_r(struct _reent *ptr, int incr)
{
char *prev_prog_break;
/* If the new program break overruns the maximum heap address, we return
* "Out of Memory" error to the user.
*/
if(prog_break + incr > _heap + HEAP_MAX_SIZE) {
ptr->_errno = ENOMEM;
return NULL;
}
prev_prog_break = prog_break;
prog_break += incr;
return prev_prog_break;
}