xref: /plan9/sys/src/9/port/initcode.c (revision 696c1e60c910958ad30cdfb7404030ea707cbbf1)
1 /*
2  * IMPORTANT!  DO NOT ADD LIBRARY CALLS TO THIS FILE.
3  * The entire text image must fit on one page
4  * (and there's no data segment, so any read/write data must be on the stack).
5  */
6 
7 #include <u.h>
8 #include <libc.h>
9 
10 char cons[] = "#c/cons";
11 char boot[] = "/boot/boot";
12 char dev[] = "/dev";
13 char c[] = "#c";
14 char e[] = "#e";
15 char ec[] = "#ec";
16 char s[] = "#s";
17 char srv[] = "/srv";
18 char env[] = "/env";
19 
20 void
startboot(char * argv0,char ** argv)21 startboot(char *argv0, char **argv)
22 {
23 	char buf[200];	/* keep this fairly large to capture error details */
24 
25 	/* in case boot is a shell script */
26 	open(cons, OREAD);
27 	open(cons, OWRITE);
28 	open(cons, OWRITE);
29 	bind(c, dev, MAFTER);
30 	bind(ec, env, MAFTER);
31 	bind(e, env, MCREATE|MAFTER);
32 	bind(s, srv, MREPL|MCREATE);
33 
34 	USED(argv0);
35 	exec(boot, argv);
36 
37 	rerrstr(buf, sizeof buf);
38 	buf[sizeof buf - 1] = '\0';
39 	_exits(buf);
40 }
41