317 lines
7.6 KiB
C
317 lines
7.6 KiB
C
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/* BSD $Id: boot.c,v 1.1 1995/02/13 23:08:07 cgd Exp $ */
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/*
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Ralph Campbell.
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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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#include <lib/libsa/stand.h>
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#include <sys/param.h>
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#include <sys/exec.h>
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#include <machine/prom.h>
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#include "../../include/coff.h"
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#define KERNEL
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#include "../../include/pte.h"
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static int aout_exec __P((int, struct exec *, u_int64_t *));
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static int coff_exec __P((int, struct exechdr *, u_int64_t *));
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static int loadfile __P((char *, u_int64_t *));
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char line[64] = "/netbsd";
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char boot_file[128];
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char boot_dev[128];
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char boot_flags[128];
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char boot_console[8];
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extern char bootprog_name[], bootprog_rev[], bootprog_date[], bootprog_maker[];
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#define KERNEL_ARGC 4
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char *kernel_argv[KERNEL_ARGC+1] = {
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boot_file,
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boot_flags,
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boot_console,
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boot_dev,
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NULL
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};
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vm_offset_t ffp_save, ptbr_save;
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void
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main(argc, argv, envp)
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int argc;
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char **argv;
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char **envp;
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{
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u_int64_t entry;
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int ask;
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prom_return_t ret;
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#ifdef notdef
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{
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extern char *_EDATA, *_end;
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bzero(_EDATA, _end - _EDATA);
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}
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#endif
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/* Init prom callback vector. */
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init_prom_calls();
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/* print a banner */
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printf("\n\n");
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printf("%s, Revision %s\n", bootprog_name, bootprog_rev);
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printf("(%s, %s)\n", bootprog_maker, bootprog_date);
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printf("\n");
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/* switch to OSF pal code. */
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OSFpal();
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printf("\n");
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prom_getenv(PROM_E_BOOTED_DEV, boot_dev, sizeof(boot_dev));
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prom_getenv(PROM_E_BOOTED_FILE, boot_file, sizeof(boot_file));
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prom_getenv(PROM_E_BOOTED_OSFLAGS, boot_flags, sizeof(boot_flags));
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prom_getenv(PROM_E_TTY_DEV, boot_console, sizeof(boot_console));
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printf("boot_dev = \"%s\"\n", boot_dev);
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printf("boot_file = \"%s\"\n", boot_file);
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printf("boot_flags = \"%s\"\n", boot_flags);
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printf("boot_console = \"%s\"\n", boot_console);
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if (boot_file[0] == '\0')
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bcopy(line, boot_file, strlen(line)+1);
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#ifdef JUSTASK
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ask = 1;
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#else
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ask = 0;
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#endif
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for (;;) {
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if (ask) {
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(void)printf("Boot: ");
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gets(line);
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if (line[0] == '\0')
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continue;
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if (!strcmp(line, "halt"))
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halt();
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/* XXX TURN LINE INTO BOOT FILE/FLAGS */
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bcopy(line, boot_file, strlen(line)+1);
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} else
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(void)printf("Boot: %s %s\n", boot_file, boot_flags);
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reset_twiddle();
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if (!loadfile(boot_file, &entry)) {
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reset_twiddle();
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printf("calling %lx with %lx, %lx, %lx, %lx, %lx\n", entry,
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ffp_save, ptbr_save, KERNEL_ARGC, kernel_argv, NULL);
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(*(void (*)())entry)(ffp_save, ptbr_save, KERNEL_ARGC,
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kernel_argv, NULL);
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}
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ask = 1;
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}
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/* NOTREACHED */
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}
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/*
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* Open 'filename', read in program and return the entry point or -1 if error.
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*/
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static int
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loadfile(fname, entryp)
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char *fname;
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u_int64_t *entryp;
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{
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struct devices *dp;
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union {
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struct exec aout;
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struct exechdr coff;
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} hdr;
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ssize_t nr;
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int fd, rval;
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/* Open the file. */
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rval = 1;
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if ((fd = open(fname, 0)) < 0) {
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reset_twiddle();
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(void)printf("open error: %d\n", errno);
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goto err;
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}
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/* Read the exec header. */
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if ((nr = read(fd, &hdr, sizeof(hdr))) != sizeof(hdr)) {
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reset_twiddle();
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(void)printf("read error: %d\n", errno);
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goto err;
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}
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/* Exec a.out or COFF. */
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rval = N_COFFBADMAG(hdr.coff.a) ?
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aout_exec(fd, &hdr.aout, entryp) :
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coff_exec(fd, &hdr.coff, entryp);
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err:
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reset_twiddle();
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#ifndef SMALL
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if (fd >= 0)
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(void)close(fd);
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#endif
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if (rval)
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(void)printf("can't boot '%s'\n", fname);
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return (rval);
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}
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static int
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aout_exec(fd, aout, entryp)
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int fd;
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struct exec *aout;
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u_int64_t *entryp;
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{
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size_t sz;
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/* Check the magic number. */
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if (N_GETMAGIC(*aout) != OMAGIC) {
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reset_twiddle();
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(void)printf("bad magic: %o\n", N_GETMAGIC(*aout));
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return (1);
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}
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/* Read in text, data. */
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(void)printf("%lu+%lu", aout->a_text, aout->a_data);
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if (lseek(fd, (off_t)N_TXTOFF(*aout), SEEK_SET) < 0) {
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reset_twiddle();
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(void)printf("lseek: %d\n", errno);
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return (1);
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}
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sz = aout->a_text + aout->a_data;
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if (read(fd, aout->a_entry, sz) != sz) {
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reset_twiddle();
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(void)printf("read text/data: %d\n", errno);
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return (1);
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}
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reset_twiddle();
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/* Zero out bss. */
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if (aout->a_bss != 0) {
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(void)printf("+%lu", aout->a_bss);
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bzero(aout->a_entry + sz, aout->a_bss);
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}
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ffp_save = aout->a_entry + aout->a_text + aout->a_data + aout->a_bss;
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ffp_save = k0segtophys((ffp_save + PGOFSET & ~PGOFSET)) >> PGSHIFT;
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ffp_save += 2; /* XXX OSF/1 does this, no idea why. */
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(void)printf("\n");
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*entryp = aout->a_entry;
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return (0);
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}
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static int
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coff_exec(fd, coff, entryp)
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int fd;
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struct exechdr *coff;
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u_int64_t *entryp;
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{
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/* Read in text. */
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reset_twiddle();
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(void)printf("%lu", coff->a.tsize);
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(void)lseek(fd, N_COFFTXTOFF(coff->f, coff->a), 0);
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if (read(fd, coff->a.text_start, coff->a.tsize) != coff->a.tsize) {
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reset_twiddle();
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(void)printf("read text: %d\n", errno);
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return (1);
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}
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/* Read in data. */
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if (coff->a.dsize != 0) {
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reset_twiddle();
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(void)printf("+%lu", coff->a.dsize);
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if (read(fd,
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coff->a.data_start, coff->a.dsize) != coff->a.dsize) {
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reset_twiddle();
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(void)printf("read data: %d\n", errno);
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return (1);
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}
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}
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reset_twiddle();
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/* Zero out bss. */
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if (coff->a.bsize != 0) {
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(void)printf("+%lu", coff->a.bsize);
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bzero(coff->a.bss_start, coff->a.bsize);
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}
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ffp_save = coff->a.text_start + coff->a.tsize;
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if (ffp_save < coff->a.data_start + coff->a.dsize)
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ffp_save = coff->a.data_start + coff->a.dsize;
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if (ffp_save < coff->a.bss_start + coff->a.bsize)
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ffp_save = coff->a.bss_start + coff->a.bsize;
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ffp_save = k0segtophys((ffp_save + PGOFSET & ~PGOFSET)) >> PGSHIFT;
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ffp_save += 2; /* XXX OSF/1 does this, no idea why. */
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(void)printf("\n");
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*entryp = coff->a.entry;
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return (0);
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}
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static int tw_on;
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static int tw_pos;
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static char tw_chars[] = "|/-\\";
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reset_twiddle()
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{
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if (tw_on)
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putchar('\b');
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tw_on = 0;
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tw_pos = 0;
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}
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twiddle()
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{
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if (tw_on)
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putchar('\b');
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else
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tw_on = 1;
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putchar(tw_chars[tw_pos++]);
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tw_pos %= (sizeof(tw_chars) - 1);
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}
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