freebsd-dev/sys/boot/i386/libi386/bootinfo.c
Ruslan Ermilov fddd9c1d2f Cause all flags passed by boot2 to set the respective loader(8)
boot_* variable.  The end effect is that all flags from boot2
are now passed to the kernel.
2005-09-22 15:14:13 +00:00

193 lines
4.8 KiB
C

/*-
* Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <stand.h>
#include <sys/param.h>
#include <sys/reboot.h>
#include <sys/linker.h>
#include "bootstrap.h"
#include "libi386.h"
#include "btxv86.h"
/*
* Return a 'boothowto' value corresponding to the kernel arguments in
* (kargs) and any relevant environment variables.
*/
static struct
{
const char *ev;
int mask;
} howto_names[] = {
{"boot_askname", RB_ASKNAME},
{"boot_cdrom", RB_CDROM},
{"boot_ddb", RB_KDB},
{"boot_dfltroot", RB_DFLTROOT},
{"boot_gdb", RB_GDB},
{"boot_multicons", RB_MULTIPLE},
{"boot_mute", RB_MUTE},
{"boot_pause", RB_PAUSE},
{"boot_serial", RB_SERIAL},
{"boot_single", RB_SINGLE},
{"boot_verbose", RB_VERBOSE},
{NULL, 0}
};
int
bi_getboothowto(char *kargs)
{
char *cp;
char *curpos, *next, *string;
int howto;
int active;
int i;
int vidconsole;
/* Parse kargs */
howto = 0;
if (kargs != NULL) {
cp = kargs;
active = 0;
while (*cp != 0) {
if (!active && (*cp == '-')) {
active = 1;
} else if (active)
switch (*cp) {
case 'a':
howto |= RB_ASKNAME;
break;
case 'C':
howto |= RB_CDROM;
break;
case 'd':
howto |= RB_KDB;
break;
case 'D':
howto |= RB_MULTIPLE;
break;
case 'm':
howto |= RB_MUTE;
break;
case 'g':
howto |= RB_GDB;
break;
case 'h':
howto |= RB_SERIAL;
break;
case 'p':
howto |= RB_PAUSE;
break;
case 'r':
howto |= RB_DFLTROOT;
break;
case 's':
howto |= RB_SINGLE;
break;
case 'v':
howto |= RB_VERBOSE;
break;
default:
active = 0;
break;
}
cp++;
}
}
/* get equivalents from the environment */
for (i = 0; howto_names[i].ev != NULL; i++)
if (getenv(howto_names[i].ev) != NULL)
howto |= howto_names[i].mask;
/* Enable selected consoles */
string = next = strdup(getenv("console"));
vidconsole = 0;
while (next != NULL) {
curpos = strsep(&next, " ,");
if (*curpos == '\0')
continue;
if (!strcmp(curpos, "vidconsole"))
vidconsole = 1;
else if (!strcmp(curpos, "comconsole"))
howto |= RB_SERIAL;
else if (!strcmp(curpos, "nullconsole"))
howto |= RB_MUTE;
}
if (vidconsole && (howto & RB_SERIAL))
howto |= RB_MULTIPLE;
/*
* XXX: Note that until the kernel is ready to respect multiple consoles
* for the boot messages, the first named console is the primary console
*/
if (!strcmp(string, "vidconsole"))
howto &= ~RB_SERIAL;
free(string);
return(howto);
}
void
bi_setboothowto(int howto)
{
int i;
for (i = 0; howto_names[i].ev != NULL; i++)
if (howto & howto_names[i].mask)
setenv(howto_names[i].ev, "YES", 1);
}
/*
* Copy the environment into the load area starting at (addr).
* Each variable is formatted as <name>=<value>, with a single nul
* separating each variable, and a double nul terminating the environment.
*/
vm_offset_t
bi_copyenv(vm_offset_t addr)
{
struct env_var *ep;
/* traverse the environment */
for (ep = environ; ep != NULL; ep = ep->ev_next) {
i386_copyin(ep->ev_name, addr, strlen(ep->ev_name));
addr += strlen(ep->ev_name);
i386_copyin("=", addr, 1);
addr++;
if (ep->ev_value != NULL) {
i386_copyin(ep->ev_value, addr, strlen(ep->ev_value));
addr += strlen(ep->ev_value);
}
i386_copyin("", addr, 1);
addr++;
}
i386_copyin("", addr, 1);
addr++;
return(addr);
}