109 lines
1.6 KiB
C
Executable File
109 lines
1.6 KiB
C
Executable File
/*
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* syscalls.c
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*
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* Created on: 03.12.2009
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* Author: Martin Thomas, 3BSD license
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*/
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#include <reent.h>
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#include <errno.h>
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#include <stdlib.h> /* abort */
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <string.h>
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#include <stdio.h>
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#if 0
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#include "usbd_cdc_vcp.h"
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#endif
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#include "board.h"
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#undef errno
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extern int errno;
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/* cppcheck-suppress unusedFunction */
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int _kill(int pid, int sig)
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{
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errno = EINVAL;
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return -1;
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}
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void _exit(int status)
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{
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#if 0
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// TODO: redirect xprintf
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xprintf("_exit called with parameter %d\n", status);
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#endif
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while(1) {;}
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}
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int _getpid(void)
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{
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return 1;
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}
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extern char _end; /* Defined by the linker */
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static char *heap_end;
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char* get_heap_end(void)
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{
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return (char*) heap_end;
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}
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char* get_stack_top(void)
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{
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// uint32_t result=0;
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return (char*) __get_MSP();
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// return (char*) __get_PSP();
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}
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caddr_t _sbrk(int incr)
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{
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char *prev_heap_end;
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if (heap_end == 0) {
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heap_end = &_end;
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}
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prev_heap_end = heap_end;
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#if 1
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if (heap_end + incr > get_stack_top()) {
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#if 0
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// TODO: redirect xprintf
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xprintf("Heap and stack collision\n");
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#endif
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abort();
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}
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#endif
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heap_end += incr;
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return (caddr_t) prev_heap_end;
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}
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int _close(int file)
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{
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return -1;
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}
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int _fstat(int file, struct stat *st)
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{
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st->st_mode = S_IFCHR;
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return 0;
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}
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int _isatty(int file)
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{
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return 1;
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}
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int _lseek(int file, int ptr, int dir) {
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return 0;
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}
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int _read(int file, char *ptr, int len)
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{
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return 0;
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}
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int _write(int file, char *ptr, int len) {
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return len;
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}
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