--- /dev/null
+/****************************************************************************
+* Copyright (c) 2009 by Michael Fischer. 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 author 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 OWNER 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.
+*
+****************************************************************************
+* History:
+*
+* 28.03.09 mifi First Version, based on the original syscall.c from
+* newlib version 1.17.0
+****************************************************************************/
+
+#include <stdlib.h>
+#include <errno.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+
+/***************************************************************************/
+
+int _read_r (struct _reent *r, int file, char * ptr, int len)
+{
+ r = r;
+ file = file;
+ ptr = ptr;
+ len = len;
+
+ errno = EINVAL;
+ return -1;
+}
+
+/***************************************************************************/
+
+int _lseek_r (struct _reent *r, int file, int ptr, int dir)
+{
+ r = r;
+ file = file;
+ ptr = ptr;
+ dir = dir;
+
+ return 0;
+}
+
+/***************************************************************************/
+
+int _write_r (struct _reent *r, int file, char * ptr, int len)
+{
+ r = r;
+ file = file;
+ ptr = ptr;
+
+#if 0
+ int index;
+
+ /* For example, output string by UART */
+ for(index=0; index<len; index++)
+ {
+ if (ptr[index] == '\n')
+ {
+ uart_putc('\r');
+ }
+
+ uart_putc(ptr[index]);
+ }
+#endif
+
+ return len;
+}
+
+/***************************************************************************/
+
+int _close_r (struct _reent *r, int file)
+{
+ return 0;
+}
+
+/***************************************************************************/
+
+/* Register name faking - works in collusion with the linker. */
+register char * stack_ptr asm ("sp");
+
+caddr_t _sbrk_r (struct _reent *r, int incr)
+{
+ extern char end asm ("end"); /* Defined by the linker. */
+ static char * heap_end;
+ char * prev_heap_end;
+
+ if (heap_end == NULL)
+ heap_end = & end;
+
+ prev_heap_end = heap_end;
+
+ if (heap_end + incr > stack_ptr)
+ {
+ /* Some of the libstdc++-v3 tests rely upon detecting
+ out of memory errors, so do not abort here. */
+#if 0
+ extern void abort (void);
+
+ _write (1, "_sbrk: Heap and stack collision\n", 32);
+
+ abort ();
+#else
+ errno = ENOMEM;
+ return (caddr_t) -1;
+#endif
+ }
+
+ heap_end += incr;
+
+ return (caddr_t) prev_heap_end;
+}
+
+/***************************************************************************/
+
+int _fstat_r (struct _reent *r, int file, struct stat * st)
+{
+ r = r;
+ file = file;
+
+ memset (st, 0, sizeof (* st));
+ st->st_mode = S_IFCHR;
+ return 0;
+}
+
+/***************************************************************************/
+
+int _isatty_r(struct _reent *r, int fd)
+{
+ r = r;
+ fd = fd;
+
+ return 1;
+}
+
+/*** EOF ***/
+
+
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