exec.c revision 1.4 
1/*	$OpenBSD: exec.c,v 1.4 2019/04/10 04:17:35 deraadt Exp $	*/
2
3/*
4 * Copyright (c) 2010 Miodrag Vallat.
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19#include <sys/param.h>
20#include <sys/reboot.h>
21#include <machine/cpu.h>
22#include <machine/pmon.h>
23#include "libsa.h"
24#include <lib/libsa/loadfile.h>
25
26typedef void (*program)(int32_t, int32_t, int32_t *, int32_t, uint64_t *);
27
28#define	PTR_TO_CKSEG1(ptr)	(int32_t)(CKSEG1_BASE | (uint64_t)(ptr))
29
30void
31run_loadfile(uint64_t *marks, int howto)
32{
33	int32_t newargc;
34	int32_t *newargv;
35	char kernelflags[8];
36	char *c;
37	const char *arg;
38
39	/*
40	 * Build a new commandline:
41	 * boot <device kernel is loaded from> -<kernel options>
42	 */
43
44	newargc = howto == 0 ? 2 : 3;
45	newargv = alloc(newargc * sizeof(int32_t));
46	if (newargv == NULL)
47		panic("out of memory");
48
49	arg = "boot";	/* kernel needs this. */
50	newargv[0] = PTR_TO_CKSEG1(arg);
51	newargv[1] = PTR_TO_CKSEG1(&pmon_bootdev);
52	if (howto != 0) {
53		c = kernelflags;
54		*c++ = '-';
55		if (howto & RB_ASKNAME)
56			*c++ = 'a';
57		if (howto & RB_CONFIG)
58			*c++ = 'c';
59		if (howto & RB_KDB)
60			*c++ = 'd';
61		if (howto & RB_SINGLE)
62			*c++ = 's';
63		*c = '\0';
64		newargv[2] = PTR_TO_CKSEG1(&kernelflags);
65	}
66
67	pmon_cacheflush();
68
69	(*(program)(marks[MARK_ENTRY]))(newargc, PTR_TO_CKSEG1(newargv),
70	    pmon_envp, pmon_callvec,
71	    (uint64_t *)PHYS_TO_CKSEG0(marks[MARK_END]));
72
73	rd_invalidate();
74	_rtt();
75}
76