9os

Experimental kernel using plan9 ideas for embedded device
git clone git://git.simple-cc.org/9os
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main.c (715B)

      1 #include <setjmp.h>
      2 #include <stdlib.h>
      3 #include <string.h>
      4 
      5 #include <libk.h>
      6 #include <os9/os9.h>
      7 
      8 #include "hosted.h"
      9 #include "../../libc/syscall.h"
     10 
     11 noreturn void longjmp(jmp_buf env, int val);
     12 
     13 Mach mach;
     14 char buffertab[NR_BUFFERS][PAGESIZE];
     15 
     16 int
     17 getch(void)
     18 {
     19 	char ch;
     20 
     21 	if (console) {
     22 		chanread(console, &ch, 1);
     23 	} else {
     24 		_read(0, &ch, 1);
     25 	}
     26 
     27 	return ch;
     28 }
     29 
     30 void
     31 putch(int c)
     32 {
     33 	char ch = c;
     34 
     35 	if (console) {
     36 		chanwrite(console, &ch, 1);
     37 	} else {
     38 		_write(1, &ch, 1);
     39 	}
     40 }
     41 
     42 void
     43 panic(const char *msg)
     44 {
     45 	kprint("panic %s\n", msg);
     46 	longjmp(recover, 1);
     47 }
     48 
     49 static void
     50 imach(void)
     51 {
     52 	if (setjmp(recover))
     53 		exit(EXIT_FAILURE);
     54 }
     55 
     56 int
     57 main(int argc, char *argv[])
     58 {
     59 	imach();
     60 	isys();
     61 
     62 	return 0;
     63 }