sys/arch/mipsco/stand/common/bootxx.c

   1 /*      $NetBSD: bootxx.c,v 1.8 2009/03/14 15:36:10 dsl Exp $   */
   2
   3 /*-
   4  * Copyright (c) 1999, 2000 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Jonathan Stone, Michael Hitch, Simon Burge and Wayne Knowles.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 /*
  33  * Copyright (c) 1992, 1993
  34  *      The Regents of the University of California.  All rights reserved.
  35  *
  36  * This code is derived from software contributed to Berkeley by
  37  * Ralph Campbell.
  38  *
  39  * Redistribution and use in source and binary forms, with or without
  40  * modification, are permitted provided that the following conditions
  41  * are met:
  42  * 1. Redistributions of source code must retain the above copyright
  43  *    notice, this list of conditions and the following disclaimer.
  44  * 2. Redistributions in binary form must reproduce the above copyright
  45  *    notice, this list of conditions and the following disclaimer in the
  46  *    documentation and/or other materials provided with the distribution.
  47  * 3. Neither the name of the University nor the names of its contributors
  48  *    may be used to endorse or promote products derived from this software
  49  *    without specific prior written permission.
  50  *
  51  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  52  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  53  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  54  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  55  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  56  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  57  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  58  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  59  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  60  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  61  * SUCH DAMAGE.
  62  *
  63  *      @(#)boot.c      8.1 (Berkeley) 6/10/93
  64  */
  65
  66 #include <sys/param.h>
  67 #include <sys/exec_elf.h>
  68 #include <lib/libsa/stand.h>
  69 #include <machine/prom.h>
  70
  71 typedef void (*entrypt)(int, char **, int, const void *);
  72
  73 int main(int, char **);
  74 entrypt loadfile(char *path, char *name);
  75
  76 /*
  77  * This gets arguments from the PROM, calls other routines to open
  78  * and load the secondary boot loader called boot, and then transfers
  79  * execution to that program.
  80  */
  81 int
  82 main(int argc, char **argv)
  83 {
  84         entrypt entry;
  85         char *cp;
  86         extern void prom_init(void);
  87
  88         prom_init();
  89
  90         cp = *argv;
  91
  92         printf("\nNetBSD/mipsco " NETBSD_VERS " " BOOTXX_FS_NAME " Primary Bootstrap\n");
  93
  94         entry = loadfile(cp, "/boot");
  95         if ((int)entry != -1)
  96                 goto goodload;
  97
  98         entry = loadfile(cp, "/boot.mipsco");
  99         if ((int)entry != -1)
 100                 goto goodload;
 101
 102         goto bad;
 103
 104  goodload:
 105         MIPS_PROM(flushcache)();
 106         entry(argc, argv, 0, 0);
 107
 108  bad:
 109         return (1);
 110 }
 111
 112 /*
 113  * Open 'filename', read in program and return the entry point or -1 if error.
 114  */
 115 entrypt
 116 loadfile(char *path, char *name)
 117 {
 118         int fd, i;
 119         char *src, *dst, bootfname[64];
 120         Elf32_Ehdr ehdr;
 121         Elf32_Phdr phdr;
 122
 123         dst = bootfname;
 124         for (src = path; *src;/**/)
 125                 if ((*dst++ = *src++) == ')')
 126                         break;
 127         for (src = name; *src;/**/)
 128                 *dst++ = *src++;
 129         *dst = (char) 0;
 130
 131         if ((fd = open(bootfname, 0)) < 0) {
 132                 printf("open %s: %d\n", bootfname, errno);
 133                 goto err;
 134         }
 135
 136         /* read the exec header */
 137         i = read(fd, (char *)&ehdr, sizeof(ehdr));
 138         if ((i != sizeof(ehdr)) ||
 139             (memcmp(ehdr.e_ident, ELFMAG, SELFMAG) != 0) ||
 140             (ehdr.e_ident[EI_CLASS] != ELFCLASS32)) {
 141                 printf("%s: No ELF header\n", bootfname);
 142                 goto cerr;
 143         }
 144
 145         for (i = 0; i < ehdr.e_phnum; i++) {
 146                 if (lseek(fd, (off_t) ehdr.e_phoff + i * sizeof(phdr), 0) < 0)
 147                         goto cerr;
 148                 if (read(fd, &phdr, sizeof(phdr)) != sizeof(phdr))
 149                         goto cerr;
 150                 if (phdr.p_type != PT_LOAD)
 151                         continue;
 152                 if (lseek(fd, (off_t)phdr.p_offset, 0) < 0)
 153                         goto cerr;
 154                 if (read(fd, (char *)phdr.p_paddr, phdr.p_filesz) != phdr.p_filesz)
 155                         goto cerr;
 156         }
 157         return ((entrypt)ehdr.e_entry);
 158
 159  cerr:
 160 #ifndef LIBSA_NO_FS_CLOSE
 161         (void) close(fd);
 162 #endif
 163  err:
 164         printf("Can't load '%s'\n", bootfname);
 165         return ((entrypt)-1);
 166 }