0d5d0b20dc
- Use format-independant module allocator. - Conditionalise ISA PnP support. - Simplify PnP enumerator interface. - Improve module/object searching. - Add missing depend/install targets in BTX makefiles. - Pass the kernel environment and module data in extended bootinfo fields. - Add a pointer to the end of the kernel + modules in bootinfo. - Fix parsing of old-style kernel arguments.
211 lines
5.7 KiB
C
211 lines
5.7 KiB
C
/*-
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* Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id: bootinfo.c,v 1.2 1998/09/03 02:10:09 msmith Exp $
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*/
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#include <sys/reboot.h>
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#include <stand.h>
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#include "bootstrap.h"
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/*
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* Return a 'boothowto' value corresponding to the kernel arguments in
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* (kargs) and any relevant environment variables.
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*/
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static struct
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{
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char *ev;
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int mask;
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} howto_names[] = {
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{"boot_askname", RB_ASKNAME},
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{"boot_userconfig", RB_CONFIG},
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{"boot_ddb", RB_KDB},
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{"boot_gdb", RB_GDB},
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{"boot_single", RB_SINGLE},
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{"boot_verbose", RB_VERBOSE},
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{NULL, 0}
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};
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int
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bi_getboothowto(char *kargs)
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{
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char *cp;
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int howto;
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int active;
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int i;
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/* Parse kargs */
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howto = 0;
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if (kargs != NULL) {
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cp = kargs;
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active = 0;
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while (*cp != 0) {
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if (!active && (*cp == '-')) {
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active = 1;
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} else if (active)
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switch (*cp) {
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case 'a':
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howto |= RB_ASKNAME;
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break;
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case 'c':
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howto |= RB_CONFIG;
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break;
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case 'd':
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howto |= RB_KDB;
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break;
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case 'g':
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howto |= RB_GDB;
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break;
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case 'h':
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howto |= RB_SERIAL;
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break;
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case 'r':
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howto |= RB_DFLTROOT;
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break;
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case 's':
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howto |= RB_SINGLE;
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break;
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case 'v':
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howto |= RB_VERBOSE;
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break;
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default:
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active = 0;
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break;
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}
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active = 0;
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cp++;
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}
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}
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/* get equivalents from the environment */
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for (i = 0; howto_names[i].ev != NULL; i++)
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if (getenv(howto_names[i].ev) != NULL)
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howto |= howto_names[i].mask;
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if (!strcmp(getenv("console"), "comconsole"))
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howto |= RB_SERIAL;
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return(howto);
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}
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/*
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* Copy the environment into the load area starting at (addr).
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* Each variable is formatted as <name>=<value>, with a single nul
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* separating each variable, and a double nul terminating the environment.
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*/
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vm_offset_t
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bi_copyenv(vm_offset_t addr)
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{
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struct env_var *ep;
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/* traverse the environment */
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for (ep = environ; ep != NULL; ep = ep->ev_next) {
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vpbcopy(ep->ev_name, addr, strlen(ep->ev_name));
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addr += strlen(ep->ev_name);
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vpbcopy("=", addr, 1);
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addr++;
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if (ep->ev_value != NULL) {
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vpbcopy(ep->ev_value, addr, strlen(ep->ev_value));
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addr += strlen(ep->ev_value);
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}
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vpbcopy("", addr, 1);
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addr++;
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}
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vpbcopy("", addr, 1);
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addr++;
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}
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/*
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* Copy module-related data into the load area, where it can be
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* used as a directory for loaded modules.
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*
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* Module data is presented in a self-describing format. Each datum
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* is preceeded by a 32-bit identifier and a 32-bit size field.
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*
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* Currently, the following data are saved:
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*
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* MOD_NAME (variable) module name (string)
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* MOD_TYPE (variable) module type (string)
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* MOD_ADDR sizeof(vm_offset_t) module load address
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* MOD_SIZE sizeof(size_t) module size
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* MOD_METADATA (variable) type-specific metadata
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*/
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#define MOD_STR(t, a, s) { \
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u_int32_t ident = (t << 16) + strlen(s) + 1; \
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vpbcopy(&ident, a, sizeof(ident)); \
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a += sizeof(ident); \
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vpbcopy(s, a, strlen(s) + 1); \
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a += strlen(s) + 1; \
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}
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#define MOD_NAME(a, s) MOD_STR(MODINFO_NAME, a, s)
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#define MOD_TYPE(a, s) MOD_STR(MODINFO_TYPE, a, s)
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#define MOD_VAR(t, a, s) { \
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u_int32_t ident = (t << 16) + sizeof(s); \
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vpbcopy(&ident, a, sizeof(ident)); \
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a += sizeof(ident); \
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vpbcopy(&s, a, sizeof(s)); \
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a += sizeof(s); \
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}
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#define MOD_ADDR(a, s) MOD_VAR(MODINFO_ADDR, a, s)
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#define MOD_SIZE(a, s) MOD_VAR(MODINFO_SIZE, a, s)
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#define MOD_METADATA(a, mm) { \
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u_int32_t ident = ((MODINFO_METADATA | mm->md_type) << 16) + mm->md_size; \
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vpbcopy(&ident, a, sizeof(ident)); \
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a += sizeof(ident); \
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vpbcopy(mm->md_data, a, mm->md_size); \
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a += mm->md_size; \
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}
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#define MOD_END(a) { \
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u_int32_t ident = 0; \
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vpbcopy(&ident, a, sizeof(ident)); \
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a += sizeof(ident); \
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vpbcopy(&ident, a, sizeof(ident)); \
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a += sizeof(ident); \
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}
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vm_offset_t
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bi_copymodules(vm_offset_t addr)
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{
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struct loaded_module *mp;
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struct module_metadata *md;
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/* start with the first module on the list, should be the kernel */
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for (mp = mod_findmodule(NULL, NULL); mp != NULL; mp = mp->m_next) {
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MOD_NAME(addr, mp->m_name); /* this field must come first */
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MOD_TYPE(addr, mp->m_type);
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MOD_ADDR(addr, mp->m_addr);
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MOD_SIZE(addr, mp->m_size);
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for (md = mp->m_metadata; md != NULL; md = md->md_next)
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if (!(md->md_type & MODINFOMD_NOCOPY))
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MOD_METADATA(addr, md);
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}
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MOD_END(addr);
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return(addr);
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}
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