188 lines
5.3 KiB
C
188 lines
5.3 KiB
C
/* $NetBSD: exec.c,v 1.17 2001/06/01 23:26:31 jdolecek Exp $ */
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/*
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* Copyright (c) 1982, 1986, 1990, 1993
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* The Regents of the University of California. All rights reserved.
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* Copyright (c) 1996
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* Matthias Drochner. All rights reserved.
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* Copyright (c) 1996
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* Perry E. Metzger. All rights reserved.
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* Copyright (c) 1997
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* Martin Husemann. 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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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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* @(#)boot.c 8.1 (Berkeley) 6/10/93
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*/
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/*
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* starts NetBSD a.out kernel
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* needs lowlevel startup from startprog.S
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* This is a special version of exec.c to support use of XMS.
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*/
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#include <sys/param.h>
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#include <sys/reboot.h>
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#include <lib/libsa/stand.h>
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#include "loadfile.h"
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#include "libi386.h"
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#include "bootinfo.h"
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#ifdef SUPPORT_PS2
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#include "biosmca.h"
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#endif
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#define BOOT_NARGS 6
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extern struct btinfo_console btinfo_console;
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int
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exec_netbsd(file, loadaddr, boothowto)
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const char *file;
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physaddr_t loadaddr;
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int boothowto;
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{
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u_long boot_argv[BOOT_NARGS];
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int fd;
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u_long marks[MARK_MAX];
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struct btinfo_symtab btinfo_symtab;
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u_long extmem;
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u_long basemem;
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#ifdef XMS
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u_long xmsmem;
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physaddr_t origaddr = loadaddr;
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#endif
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#ifdef DEBUG
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printf("exec: file=%s loadaddr=0x%lx\n",
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file ? file : "NULL", loadaddr);
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#endif
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BI_ALLOC(6); /* ??? */
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BI_ADD(&btinfo_console, BTINFO_CONSOLE, sizeof(struct btinfo_console));
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extmem = getextmem();
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basemem = getbasemem();
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#ifdef XMS
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if ((getextmem1() == 0) && (xmsmem = checkxms())) {
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u_long kernsize;
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/*
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* With "CONSERVATIVE_MEMDETECT", extmem is 0 because
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* getextmem() is getextmem1(). Without, the "smart"
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* methods could fail to report all memory as well.
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* xmsmem is a few kB less than the actual size, but
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* better than nothing.
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*/
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if (xmsmem > extmem)
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extmem = xmsmem;
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/*
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* Get the size of the kernel
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*/
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marks[MARK_START] = loadaddr;
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if ((fd = loadfile(file, marks, COUNT_KERNEL)) == -1)
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goto out;
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close(fd);
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kernsize = marks[MARK_END];
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kernsize = (kernsize + 1023) / 1024;
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loadaddr = xmsalloc(kernsize);
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if (!loadaddr)
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return(ENOMEM);
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}
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#endif
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marks[MARK_START] = loadaddr;
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if ((fd = loadfile(file, marks, LOAD_KERNEL)) == -1)
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goto out;
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boot_argv[0] = boothowto;
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boot_argv[1] = 0;
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boot_argv[2] = vtophys(bootinfo); /* old cyl offset */
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/* argv[3] below */
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boot_argv[4] = extmem;
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boot_argv[5] = basemem;
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close(fd);
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/*
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* Gather some information for the kernel. Do this after the
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* "point of no return" to avoid memory leaks.
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* (but before DOS might be trashed in the XMS case)
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*/
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#ifdef PASS_BIOSGEOM
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bi_getbiosgeom();
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#endif
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#ifdef PASS_MEMMAP
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bi_getmemmap();
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#endif
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#ifdef XMS
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if (loadaddr != origaddr) {
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/*
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* We now have done our last DOS IO, so we may
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* trash the OS. Copy the data from the temporary
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* buffer to its real adress.
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*/
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marks[MARK_START] -= loadaddr;
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marks[MARK_END] -= loadaddr;
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marks[MARK_SYM] -= loadaddr;
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marks[MARK_END] -= loadaddr;
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ppbcopy(loadaddr, origaddr, marks[MARK_END]);
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}
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#endif
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marks[MARK_END] = (((u_long) marks[MARK_END] + sizeof(int) - 1)) &
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(-sizeof(int));
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boot_argv[3] = marks[MARK_END];
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#ifdef DEBUG
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printf("Start @ 0x%lx [%ld=0x%lx-0x%lx]...\n", marks[MARK_ENTRY],
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marks[MARK_NSYM], marks[MARK_SYM], marks[MARK_END]);
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#endif
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btinfo_symtab.nsym = marks[MARK_NSYM];
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btinfo_symtab.ssym = marks[MARK_SYM];
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btinfo_symtab.esym = marks[MARK_END];
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BI_ADD(&btinfo_symtab, BTINFO_SYMTAB, sizeof(struct btinfo_symtab));
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startprog(marks[MARK_ENTRY], BOOT_NARGS, boot_argv,
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i386_trunc_page(basemem*1024));
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panic("exec returned");
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out:
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BI_FREE();
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bootinfo = 0;
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return (-1);
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}
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