cab57be9ae
Do a much better job of DWIM with partial device specifications. Fix the module metadata build process, which was completely broken. Use a larger read buffer when copying large objects in; this improves performance marginally and will avoid flushning any small caches we might choose to implement.
79 lines
2.8 KiB
C
79 lines
2.8 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 1.9 1998/10/02 20:53:16 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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#include "btxv86.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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/*
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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 module_metadata *md;
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struct exec *ehdr;
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vm_offset_t entry, bootinfop;
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int boothowto, err, bootdev;
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struct bootinfo *bi;
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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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/* XXX allow override? */
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setenv("kernelname", mp->m_name, 1);
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if ((err = bi_load(mp->m_args, &boothowto, &bootdev, &bootinfop)) != 0)
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return(err);
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entry = ehdr->a_entry & 0xffffff;
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bi = (struct bootinfo *)PTOV(bootinfop);
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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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__exec((void *)entry, boothowto, bootdev, 0, 0, 0, bootinfop);
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panic("exec returned");
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}
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