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make it reasonable for processes to not double-map it's user area and kstack

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This commit is contained in:
cgd 1995-03-25 22:05:15 +00:00
parent b51403f60d
commit fd10fb94e5
1 changed files with 45 additions and 13 deletions
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58
sys/kern/init_main.c
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@ -1,6 +1,7 @@
/* $NetBSD: init_main.c,v 1.75 1995/03/19 23:27:03 mycroft Exp $ */
/* $NetBSD: init_main.c,v 1.76 1995/03/25 22:05:15 cgd Exp $ */
/*
* Copyright (c) 1995 Christopher G. Demetriou. All rights reserved.
* Copyright (c) 1982, 1986, 1989, 1991, 1992, 1993
* The Regents of the University of California. All rights reserved.
* (c) UNIX System Laboratories, Inc.
@ -92,7 +93,12 @@ int boothowto;
struct timeval boottime;
struct timeval runtime;
static void start_init __P((struct proc *p, void *framep));
static void start_init __P((struct proc *));
static void start_pagedaemon __P((struct proc *));
#ifdef cpu_set_init_frame
void *initframep; /* XXX should go away */
#endif
/*
* System startup; initialize the world, create process 0, mount root
@ -102,7 +108,7 @@ static void start_init __P((struct proc *p, void *framep));
*/
int
main(framep)
void *framep;
void *framep; /* XXX should go away */
{
register struct proc *p;
register struct filedesc0 *fdp;
@ -289,25 +295,32 @@ main(framep)
/* Create process 1 (init(8)). */
if (fork(p, NULL, rval))
panic("fork init");
#ifdef cpu_set_init_frame /* XXX should go away */
if (rval[1]) {
start_init(curproc, framep);
/*
* Now in process 1.
*/
initframep = framep;
start_init(curproc);
return;
}
#else
cpu_set_kpc(pfind(1), start_init);
#endif
/* Create process 2 (the pageout daemon). */
if (fork(p, NULL, rval))
panic("fork pager");
#ifdef cpu_set_init_frame /* XXX should go away */
if (rval[1]) {
/*
* Now in process 2.
*/
p = curproc;
pageproc = p;
p->p_flag |= P_INMEM | P_SYSTEM; /* XXX */
bcopy("pagedaemon", curproc->p_comm, sizeof ("pagedaemon"));
vm_pageout();
/* NOTREACHED */
start_pagedaemon(curproc);
}
#else
cpu_set_kpc(pfind(2), start_pagedaemon);
#endif
/* The scheduler is an infinite loop. */
scheduler();
@ -329,9 +342,8 @@ static char *initpaths[] = {
* The program is invoked with one argument containing the boot flags.
*/
static void
start_init(p, framep)
start_init(p)
struct proc *p;
void *framep;
{
vm_offset_t addr;
struct execve_args /* {
@ -344,8 +356,12 @@ start_init(p, framep)
char flags[4], *flagsp;
char **pathp, *path, *ucp, **uap, *arg0, *arg1;
/*
* Now in process 1.
*/
initproc = p;
#ifdef cpu_set_init_frame /* XXX should go away */
/*
* We need to set the system call frame as if we were entered through
* a syscall() so that when we call execve() below, it will be able
@ -353,7 +369,8 @@ start_init(p, framep)
* startup code in "locore.s" has allocated space for the frame and
* passed a pointer to that space as main's argument.
*/
cpu_set_init_frame(p, framep);
cpu_set_init_frame(p, initframep);
#endif
/*
* Need just enough stack to hold the faked-up "execve()" arguments.
@ -436,3 +453,18 @@ start_init(p, framep)
printf("init: not found\n");
panic("no init");
}
static void
start_pagedaemon(p)
struct proc *p;
{
/*
* Now in process 2.
*/
pageproc = p;
p->p_flag |= P_INMEM | P_SYSTEM; /* XXX */
bcopy("pagedaemon", curproc->p_comm, sizeof ("pagedaemon"));
vm_pageout();
/* NOTREACHED */
}