diff options
Diffstat (limited to 'syscalls.c')
| -rw-r--r-- | syscalls.c | 196 |
1 files changed, 196 insertions, 0 deletions
diff --git a/syscalls.c b/syscalls.c new file mode 100644 index 0000000..58f3ecc --- /dev/null +++ b/syscalls.c @@ -0,0 +1,196 @@ +/**************************************************************************** +* 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 +****************************************************************************/ + +/**************************************************************************** +* 2015-10-29 pselkirk for cryptech: +* Changed asm to __asm for c99 compatibility. +* Added _exit, _kill, and _getpid from mifi's 2013 revision. +****************************************************************************/ + +#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; +} + +/***************************************************************************/ + +void _exit (int a) +{ + a = a; + + while(1) {}; +} + +/***************************************************************************/ + +int _kill (int a, int b) +{ + a = a; + b = b; + + return 0; +} + +/***************************************************************************/ + +int _getpid(int a) +{ + a = a; + + return 0; +} + +/*** EOF ***/ + + |