diff options
Diffstat (limited to 'sys/boot/i386/libi386/bootinfo.c')
| -rw-r--r-- | sys/boot/i386/libi386/bootinfo.c | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/sys/boot/i386/libi386/bootinfo.c b/sys/boot/i386/libi386/bootinfo.c new file mode 100644 index 0000000..5095281 --- /dev/null +++ b/sys/boot/i386/libi386/bootinfo.c @@ -0,0 +1,157 @@ +/*- + * 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_userconfig", RB_CONFIG}, + {"boot_ddb", RB_KDB}, + {"boot_gdb", RB_GDB}, + {"boot_single", RB_SINGLE}, + {"boot_verbose", RB_VERBOSE}, + {"boot_multicons", RB_MULTIPLE}, + {"boot_serial", RB_SERIAL}, + {NULL, 0} +}; + +int +bi_getboothowto(char *kargs) +{ + char *cp; + int howto; + int active; + int i; + + /* 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_CONFIG; + 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; + if (!strcmp(getenv("console"), "comconsole")) + howto |= RB_SERIAL; + if (!strcmp(getenv("console"), "nullconsole")) + howto |= RB_MUTE; + return(howto); +} + +/* + * 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); +} |
