exec.c revision 1.18
1/* $NetBSD: exec.c,v 1.18 2003/02/27 12:22:52 hannken Exp $ */ 2 3/* 4 * Copyright (c) 1982, 1986, 1990, 1993 5 * The Regents of the University of California. All rights reserved. 6 * Copyright (c) 1996 7 * Matthias Drochner. All rights reserved. 8 * Copyright (c) 1996 9 * Perry E. Metzger. All rights reserved. 10 * Copyright (c) 1997 11 * Martin Husemann. All rights reserved. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. All advertising materials mentioning features or use of this software 22 * must display the following acknowledgement: 23 * This product includes software developed by the University of 24 * California, Berkeley and its contributors. 25 * 4. Neither the name of the University nor the names of its contributors 26 * may be used to endorse or promote products derived from this software 27 * without specific prior written permission. 28 * 29 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 30 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 31 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 32 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 33 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 34 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 35 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 36 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 37 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 38 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 39 * SUCH DAMAGE. 40 * 41 * @(#)boot.c 8.1 (Berkeley) 6/10/93 42 */ 43 44/* 45 * starts NetBSD a.out kernel 46 * needs lowlevel startup from startprog.S 47 * This is a special version of exec.c to support use of XMS. 48 */ 49 50#include <sys/param.h> 51#include <sys/reboot.h> 52 53#include <lib/libsa/stand.h> 54 55#include "loadfile.h" 56#include "libi386.h" 57#include "bootinfo.h" 58#ifdef SUPPORT_PS2 59#include "biosmca.h" 60#endif 61 62#define BOOT_NARGS 6 63 64extern struct btinfo_console btinfo_console; 65 66int 67exec_netbsd(file, loadaddr, boothowto) 68 const char *file; 69 physaddr_t loadaddr; 70 int boothowto; 71{ 72 u_long boot_argv[BOOT_NARGS]; 73 int fd; 74 u_long marks[MARK_MAX]; 75 struct btinfo_symtab btinfo_symtab; 76 u_long extmem; 77 u_long basemem; 78#ifdef XMS 79 u_long xmsmem; 80 physaddr_t origaddr = loadaddr; 81#endif 82 83#ifdef DEBUG 84 printf("exec: file=%s loadaddr=0x%lx\n", 85 file ? file : "NULL", loadaddr); 86#endif 87 88 BI_ALLOC(6); /* ??? */ 89 90 BI_ADD(&btinfo_console, BTINFO_CONSOLE, sizeof(struct btinfo_console)); 91 92 extmem = getextmem(); 93 basemem = getbasemem(); 94 95#ifdef XMS 96 if ((getextmem1() == 0) && (xmsmem = checkxms())) { 97 u_long kernsize; 98 99 /* 100 * With "CONSERVATIVE_MEMDETECT", extmem is 0 because 101 * getextmem() is getextmem1(). Without, the "smart" 102 * methods could fail to report all memory as well. 103 * xmsmem is a few kB less than the actual size, but 104 * better than nothing. 105 */ 106 if (xmsmem > extmem) 107 extmem = xmsmem; 108 /* 109 * Get the size of the kernel 110 */ 111 marks[MARK_START] = loadaddr; 112 if ((fd = loadfile(file, marks, COUNT_KERNEL)) == -1) 113 goto out; 114 close(fd); 115 116 kernsize = marks[MARK_END]; 117 kernsize = (kernsize + 1023) / 1024; 118 119 loadaddr = xmsalloc(kernsize); 120 if (!loadaddr) 121 return(ENOMEM); 122 } 123#endif 124 marks[MARK_START] = loadaddr; 125 if ((fd = loadfile(file, marks, LOAD_KERNEL)) == -1) 126 goto out; 127 128 boot_argv[0] = boothowto; 129 boot_argv[1] = 0; 130 boot_argv[2] = vtophys(bootinfo); /* old cyl offset */ 131 /* argv[3] below */ 132 boot_argv[4] = extmem; 133 boot_argv[5] = basemem; 134 135 close(fd); 136 137 /* 138 * Gather some information for the kernel. Do this after the 139 * "point of no return" to avoid memory leaks. 140 * (but before DOS might be trashed in the XMS case) 141 */ 142#ifdef PASS_BIOSGEOM 143 bi_getbiosgeom(); 144#endif 145#ifdef PASS_MEMMAP 146 bi_getmemmap(); 147#endif 148 149#ifdef XMS 150 if (loadaddr != origaddr) { 151 /* 152 * We now have done our last DOS IO, so we may 153 * trash the OS. Copy the data from the temporary 154 * buffer to its real adress. 155 */ 156 marks[MARK_START] -= loadaddr; 157 marks[MARK_END] -= loadaddr; 158 marks[MARK_SYM] -= loadaddr; 159 marks[MARK_END] -= loadaddr; 160 ppbcopy(loadaddr, origaddr, marks[MARK_END]); 161 } 162#endif 163 marks[MARK_END] = (((u_long) marks[MARK_END] + sizeof(int) - 1)) & 164 (-sizeof(int)); 165 166 boot_argv[3] = marks[MARK_END]; 167 168 169#ifdef DEBUG 170 printf("Start @ 0x%lx [%ld=0x%lx-0x%lx]...\n", marks[MARK_ENTRY], 171 marks[MARK_NSYM], marks[MARK_SYM], marks[MARK_END]); 172#endif 173 174 btinfo_symtab.nsym = marks[MARK_NSYM]; 175 btinfo_symtab.ssym = marks[MARK_SYM]; 176 btinfo_symtab.esym = marks[MARK_END]; 177 BI_ADD(&btinfo_symtab, BTINFO_SYMTAB, sizeof(struct btinfo_symtab)); 178 179 startprog(marks[MARK_ENTRY], BOOT_NARGS, boot_argv, 180 x86_trunc_page(basemem*1024)); 181 panic("exec returned"); 182 183out: 184 BI_FREE(); 185 bootinfo = 0; 186 return (-1); 187} 188