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.
147 lines
4.8 KiB
C
147 lines
4.8 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: aout_freebsd.c,v 1.2 1998/08/31 21:10:43 msmith Exp $
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*/
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#include <sys/param.h>
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#include <sys/exec.h>
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#include <sys/imgact_aout.h>
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#include <sys/reboot.h>
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#include <sys/linker.h>
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#include <string.h>
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#include <machine/bootinfo.h>
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#include <stand.h>
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#include "bootstrap.h"
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#include "libi386.h"
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static int aout_exec(struct loaded_module *amp);
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struct module_format i386_aout = { aout_loadmodule, aout_exec };
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static struct bootinfo bi;
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/*
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* There is an a.out kernel and one or more a.out modules loaded.
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* We wish to start executing the kernel image, so make such
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* preparations as are required, and do so.
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*/
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static int
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aout_exec(struct loaded_module *mp)
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{
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struct loaded_module *xp;
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struct i386_devdesc *currdev;
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struct module_metadata *md;
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struct exec *ehdr;
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u_int32_t argv[6]; /* kernel arguments */
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int major, bootdevnr;
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vm_offset_t addr, entry;
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u_int pad;
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if ((md = mod_findmetadata(mp, MODINFOMD_AOUTEXEC)) == NULL)
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return(EFTYPE); /* XXX actually EFUCKUP */
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ehdr = (struct exec *)&(md->md_data);
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/* Boot from whatever the current device is */
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i386_getdev((void **)(&currdev), NULL, NULL);
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switch(currdev->d_type) {
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case DEVT_DISK:
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major = 0; /* XXX work out the best possible major here */
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bootdevnr = MAKEBOOTDEV(major,
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currdev->d_kind.biosdisk.slice >> 4,
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currdev->d_kind.biosdisk.slice & 0xf,
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currdev->d_kind.biosdisk.unit,
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currdev->d_kind.biosdisk.partition);
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break;
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default:
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printf("aout_exec: WARNING - don't know how to boot from device type %d\n", currdev->d_type);
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}
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free(currdev);
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/* legacy bootinfo structure */
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bi.bi_version = BOOTINFO_VERSION;
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bi.bi_kernelname = 0; /* XXX char * -> kernel name */
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bi.bi_nfs_diskless = 0; /* struct nfs_diskless * */
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bi.bi_n_bios_used = 0; /* XXX would have to hook biosdisk driver for these */
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/* bi.bi_bios_geom[] */
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bi.bi_size = sizeof(bi);
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bi.bi_memsizes_valid = 1;
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bi.bi_vesa = 0; /* XXX correct value? */
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bi.bi_basemem = getbasemem();
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bi.bi_extmem = getextmem();
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bi.bi_symtab = mp->m_addr + ehdr->a_text + ehdr->a_data + ehdr->a_bss;
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bi.bi_esymtab = bi.bi_symtab + sizeof(ehdr->a_syms) + ehdr->a_syms;
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/* Device data is kept in the kernel argv array */
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argv[0] = bi_getboothowto(mp->m_args); /* boothowto */
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argv[1] = bootdevnr; /* bootdev */
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argv[2] = 0; /* old cyloffset */
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argv[3] = 0; /* old esym */
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argv[4] = 0; /* "new" bootinfo magic */
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argv[5] = (u_int32_t)vtophys(&bi);
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/* find the last module in the chain */
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for (xp = mp; xp->m_next != NULL; xp = xp->m_next)
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;
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addr = xp->m_addr + xp->m_size;
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/* pad to a page boundary */
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pad = (u_int)addr & PAGE_MASK;
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if (pad != 0) {
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pad = PAGE_SIZE - pad;
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addr += pad;
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}
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/* copy our environment */
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bi.bi_envp = addr;
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addr = bi_copyenv(addr);
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/* pad to a page boundary */
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pad = (u_int)addr & PAGE_MASK;
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if (pad != 0) {
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pad = PAGE_SIZE - pad;
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addr += pad;
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}
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/* copy module list and metadata */
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bi.bi_modulep = addr;
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addr = bi_copymodules(addr);
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/* all done copying stuff in, save end of loaded object space */
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bi.bi_kernend = addr;
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entry = ehdr->a_entry & 0xffffff;
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#ifdef DEBUG
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{
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int i;
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for (i = 0; i < 6; i++)
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printf("argv[%d]=%lx\n", i, argv[i]);
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}
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printf("Start @ 0x%lx ...\n", entry);
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#endif
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startprog(entry, 6, argv, (vm_offset_t)0x90000);
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panic("exec returned");
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}
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