49e81dc952
in make.conf or src.conf. - When GPT is enabled (which it is by default), use memory above 1 MB and leave the memory from the end of the bss to the end of the 640k window purely for the stack. The loader has grown and now it is much more common for the heap and stack to grow into each other when both are located in the 640k window. PR: kern/129526 MFC after: 1 week
273 lines
6.7 KiB
C
273 lines
6.7 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 <string.h>
|
|
#include <sys/disklabel.h>
|
|
#include "bootstrap.h"
|
|
#include "libi386.h"
|
|
|
|
static int i386_parsedev(struct i386_devdesc **dev, const char *devspec, const char **path);
|
|
|
|
/*
|
|
* Point (dev) at an allocated device specifier for the device matching the
|
|
* path in (devspec). If it contains an explicit device specification,
|
|
* use that. If not, use the default device.
|
|
*/
|
|
int
|
|
i386_getdev(void **vdev, const char *devspec, const char **path)
|
|
{
|
|
struct i386_devdesc **dev = (struct i386_devdesc **)vdev;
|
|
int rv;
|
|
|
|
/*
|
|
* If it looks like this is just a path and no
|
|
* device, go with the current device.
|
|
*/
|
|
if ((devspec == NULL) ||
|
|
(devspec[0] == '/') ||
|
|
(strchr(devspec, ':') == NULL)) {
|
|
|
|
if (((rv = i386_parsedev(dev, getenv("currdev"), NULL)) == 0) &&
|
|
(path != NULL))
|
|
*path = devspec;
|
|
return(rv);
|
|
}
|
|
|
|
/*
|
|
* Try to parse the device name off the beginning of the devspec
|
|
*/
|
|
return(i386_parsedev(dev, devspec, path));
|
|
}
|
|
|
|
/*
|
|
* Point (dev) at an allocated device specifier matching the string version
|
|
* at the beginning of (devspec). Return a pointer to the remaining
|
|
* text in (path).
|
|
*
|
|
* In all cases, the beginning of (devspec) is compared to the names
|
|
* of known devices in the device switch, and then any following text
|
|
* is parsed according to the rules applied to the device type.
|
|
*
|
|
* For disk-type devices, the syntax is:
|
|
*
|
|
* disk<unit>[s<slice>][<partition>]:
|
|
*
|
|
*/
|
|
static int
|
|
i386_parsedev(struct i386_devdesc **dev, const char *devspec, const char **path)
|
|
{
|
|
struct i386_devdesc *idev;
|
|
struct devsw *dv;
|
|
int i, unit, slice, partition, err;
|
|
char *cp;
|
|
const char *np;
|
|
|
|
/* minimum length check */
|
|
if (strlen(devspec) < 2)
|
|
return(EINVAL);
|
|
|
|
/* look for a device that matches */
|
|
for (i = 0, dv = NULL; devsw[i] != NULL; i++) {
|
|
if (!strncmp(devspec, devsw[i]->dv_name, strlen(devsw[i]->dv_name))) {
|
|
dv = devsw[i];
|
|
break;
|
|
}
|
|
}
|
|
if (dv == NULL)
|
|
return(ENOENT);
|
|
idev = malloc(sizeof(struct i386_devdesc));
|
|
err = 0;
|
|
np = (devspec + strlen(dv->dv_name));
|
|
|
|
switch(dv->dv_type) {
|
|
case DEVT_NONE: /* XXX what to do here? Do we care? */
|
|
break;
|
|
|
|
case DEVT_DISK:
|
|
unit = -1;
|
|
slice = -1;
|
|
partition = -1;
|
|
if (*np && (*np != ':')) {
|
|
unit = strtol(np, &cp, 10); /* next comes the unit number */
|
|
if (cp == np) {
|
|
err = EUNIT;
|
|
goto fail;
|
|
}
|
|
#ifdef LOADER_GPT_SUPPORT
|
|
if (*cp == 'p') { /* got a GPT partition */
|
|
np = cp + 1;
|
|
slice = strtol(np, &cp, 10);
|
|
if (cp == np) {
|
|
err = ESLICE;
|
|
goto fail;
|
|
}
|
|
if (*cp && (*cp != ':')) {
|
|
err = EINVAL;
|
|
goto fail;
|
|
}
|
|
partition = 0xff;
|
|
} else {
|
|
#endif
|
|
if (*cp == 's') { /* got a slice number */
|
|
np = cp + 1;
|
|
slice = strtol(np, &cp, 10);
|
|
if (cp == np) {
|
|
err = ESLICE;
|
|
goto fail;
|
|
}
|
|
}
|
|
if (*cp && (*cp != ':')) {
|
|
partition = *cp - 'a'; /* got a partition number */
|
|
if ((partition < 0) || (partition >= MAXPARTITIONS)) {
|
|
err = EPART;
|
|
goto fail;
|
|
}
|
|
cp++;
|
|
}
|
|
#ifdef LOADER_GPT_SUPPORT
|
|
}
|
|
#endif
|
|
} else {
|
|
cp = np;
|
|
}
|
|
if (*cp && (*cp != ':')) {
|
|
err = EINVAL;
|
|
goto fail;
|
|
}
|
|
|
|
idev->d_unit = unit;
|
|
idev->d_kind.biosdisk.slice = slice;
|
|
idev->d_kind.biosdisk.partition = partition;
|
|
if (path != NULL)
|
|
*path = (*cp == 0) ? cp : cp + 1;
|
|
break;
|
|
|
|
case DEVT_CD:
|
|
case DEVT_NET:
|
|
case DEVT_ZFS:
|
|
unit = 0;
|
|
|
|
if (*np && (*np != ':')) {
|
|
unit = strtol(np, &cp, 0); /* get unit number if present */
|
|
if (cp == np) {
|
|
err = EUNIT;
|
|
goto fail;
|
|
}
|
|
} else {
|
|
cp = np;
|
|
}
|
|
if (*cp && (*cp != ':')) {
|
|
err = EINVAL;
|
|
goto fail;
|
|
}
|
|
|
|
idev->d_unit = unit;
|
|
if (path != NULL)
|
|
*path = (*cp == 0) ? cp : cp + 1;
|
|
break;
|
|
|
|
default:
|
|
err = EINVAL;
|
|
goto fail;
|
|
}
|
|
idev->d_dev = dv;
|
|
idev->d_type = dv->dv_type;
|
|
if (dev == NULL) {
|
|
free(idev);
|
|
} else {
|
|
*dev = idev;
|
|
}
|
|
return(0);
|
|
|
|
fail:
|
|
free(idev);
|
|
return(err);
|
|
}
|
|
|
|
|
|
char *
|
|
i386_fmtdev(void *vdev)
|
|
{
|
|
struct i386_devdesc *dev = (struct i386_devdesc *)vdev;
|
|
static char buf[128]; /* XXX device length constant? */
|
|
char *cp;
|
|
|
|
switch(dev->d_type) {
|
|
case DEVT_NONE:
|
|
strcpy(buf, "(no device)");
|
|
break;
|
|
|
|
case DEVT_CD:
|
|
sprintf(buf, "%s%d:", dev->d_dev->dv_name, dev->d_unit);
|
|
break;
|
|
|
|
case DEVT_DISK:
|
|
cp = buf;
|
|
cp += sprintf(cp, "%s%d", dev->d_dev->dv_name, dev->d_unit);
|
|
#ifdef LOADER_GPT_SUPPORT
|
|
if (dev->d_kind.biosdisk.partition == 0xff) {
|
|
cp += sprintf(cp, "p%d", dev->d_kind.biosdisk.slice);
|
|
} else {
|
|
#endif
|
|
if (dev->d_kind.biosdisk.slice > 0)
|
|
cp += sprintf(cp, "s%d", dev->d_kind.biosdisk.slice);
|
|
if (dev->d_kind.biosdisk.partition >= 0)
|
|
cp += sprintf(cp, "%c", dev->d_kind.biosdisk.partition + 'a');
|
|
#ifdef LOADER_GPT_SUPPORT
|
|
}
|
|
#endif
|
|
strcat(cp, ":");
|
|
break;
|
|
|
|
case DEVT_NET:
|
|
case DEVT_ZFS:
|
|
sprintf(buf, "%s%d:", dev->d_dev->dv_name, dev->d_unit);
|
|
break;
|
|
}
|
|
return(buf);
|
|
}
|
|
|
|
|
|
/*
|
|
* Set currdev to suit the value being supplied in (value)
|
|
*/
|
|
int
|
|
i386_setcurrdev(struct env_var *ev, int flags, const void *value)
|
|
{
|
|
struct i386_devdesc *ncurr;
|
|
int rv;
|
|
|
|
if ((rv = i386_parsedev(&ncurr, value, NULL)) != 0)
|
|
return(rv);
|
|
free(ncurr);
|
|
env_setenv(ev->ev_name, flags | EV_NOHOOK, value, NULL, NULL);
|
|
return(0);
|
|
}
|