99 lines
1.4 KiB
C
99 lines
1.4 KiB
C
#include <debug-uart.h>
|
|
#include <sys/stat.h>
|
|
#include <errno.h>
|
|
|
|
int
|
|
_open(const char *name, int flags, int mode) {
|
|
errno = ENOENT;
|
|
return -1;
|
|
}
|
|
|
|
int
|
|
_close(int file)
|
|
{
|
|
if (file == 1 || file == 2) {
|
|
dbg_drain();
|
|
return 0;
|
|
}
|
|
errno = EBADF;
|
|
return -1;
|
|
}
|
|
|
|
int
|
|
isatty(int file)
|
|
{
|
|
if (file >= 0 && file <= 2) return 1;
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
_read(int file, char *ptr, int len){
|
|
return 0;
|
|
}
|
|
|
|
|
|
|
|
int
|
|
_write(int file, const char *ptr, int len){
|
|
int sent = -1;
|
|
if (file == 1 || file == 2) {
|
|
sent = dbg_send_bytes((const unsigned char*)ptr, len);
|
|
}
|
|
return sent;
|
|
}
|
|
|
|
int
|
|
_lseek(int file, int ptr, int dir){
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
_fstat(int file, struct stat *st) {
|
|
if (file >= 0 && file <= 2) {
|
|
st->st_mode = S_IFCHR;
|
|
return 0;
|
|
}
|
|
errno = EBADF;
|
|
return -1;
|
|
}
|
|
|
|
int
|
|
_stat(char *file, struct stat *st) {
|
|
errno = ENOENT;
|
|
return -1;
|
|
}
|
|
|
|
caddr_t
|
|
_sbrk(int incr)
|
|
{
|
|
extern char __heap_start__; /* Defined by the linker */
|
|
extern char __heap_end__; /* Defined by the linker */
|
|
static char *heap_end;
|
|
char *prev_heap_end;
|
|
|
|
if (heap_end == 0) {
|
|
heap_end = &__heap_start__;
|
|
}
|
|
prev_heap_end = heap_end;
|
|
if (heap_end + incr > &__heap_end__) {
|
|
_write (2, "Heap full\n", 10);
|
|
errno = ENOMEM;
|
|
return (caddr_t)-1;
|
|
}
|
|
|
|
heap_end += incr;
|
|
return (caddr_t) prev_heap_end;
|
|
}
|
|
|
|
int
|
|
fsync(int fd)
|
|
{
|
|
if (fd == 1 || fd == 2) {
|
|
dbg_drain();
|
|
return 0;
|
|
}
|
|
if (fd == 0) return 0;
|
|
errno = EBADF;
|
|
return -1;
|
|
}
|