124 lines
1.7 KiB
C
124 lines
1.7 KiB
C
#include <debug-uart.h>
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#include <sys/stat.h>
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#include <errno.h>
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#include <stdio.h>
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int
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_open(const char *name, int flags, int mode) {
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errno = ENOENT;
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return -1;
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}
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int
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_close(int file)
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{
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if (file == 1 || file == 2) {
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dbg_drain();
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return 0;
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}
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errno = EBADF;
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return -1;
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}
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int
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isatty(int file)
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{
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if (file >= 0 && file <= 2) return 1;
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return 0;
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}
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int
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_read(int file, char *ptr, int len){
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return 0;
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}
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int
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_write(int file, const char *ptr, int len){
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int sent = -1;
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if (file == 1 || file == 2) {
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sent = dbg_send_bytes((const unsigned char*)ptr, len);
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}
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return sent;
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}
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int
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_lseek(int file, int ptr, int dir){
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return 0;
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}
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int
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_fstat(int file, struct stat *st) {
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if (file >= 0 && file <= 2) {
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st->st_mode = S_IFCHR;
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return 0;
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}
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errno = EBADF;
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return -1;
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}
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int
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_stat(char *file, struct stat *st) {
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errno = ENOENT;
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return -1;
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}
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caddr_t
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_sbrk(int incr)
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{
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extern char __heap_start__; /* Defined by the linker */
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extern char __heap_end__; /* Defined by the linker */
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static char *heap_end = &__heap_start__;
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char *prev_heap_end;
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prev_heap_end = heap_end;
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if (heap_end + incr > &__heap_end__) {
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printf("Heap full (requested %d, available %d)\n",
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incr, (int)(&__heap_end__ - heap_end));
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errno = ENOMEM;
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return (caddr_t)-1;
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}
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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
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fsync(int fd)
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{
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if (fd == 1 || fd == 2) {
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dbg_drain();
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return 0;
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}
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if (fd == 0) return 0;
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errno = EBADF;
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return -1;
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}
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void
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_exit(int status)
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{
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while(1);
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}
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void
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_abort()
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{
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while(1);
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}
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void
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_kill()
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{
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while(1);
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}
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pid_t
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_getpid(void)
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{
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return 1;
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}
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const unsigned long
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bkpt_instr = 0xe1200070;
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