49 lines
875 B
C
49 lines
875 B
C
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/*
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* syscalls.c
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*
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* Created on: Dec 14, 2014
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* Author: shino-chan
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*/
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#include "uart.h"
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char* _sbrk(int incr) {
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extern char heap_low; // Defined by the linker
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extern char heap_top;
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static char *heap_end;
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char *prev_heap_end;
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if (heap_end == 0) {
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heap_end = &heap_low;
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}
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prev_heap_end = heap_end;
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if (heap_end + incr > &heap_top) {
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return 0;
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}
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heap_end += incr;
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return (char*) prev_heap_end;
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}
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int _isatty(int fd) {
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return 1;
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}
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int _close(int fd) {
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return 0;
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}
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int _open(int fd) {
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return 0;
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}
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int _fstat(void) {
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return 0;
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}
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int _lseek(void) {
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return 0;
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}
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int _read(void) {
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return 0;
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}
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int _write(int fd, const void *buf, int count) {
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sendString((char*)buf, count);
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return count;
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}
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