282 lines
6.1 KiB
C
282 lines
6.1 KiB
C
/*
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* Copyright (c) 1995 Ugen J.S.Antsilevich
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*
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* Redistribution and use in source forms, with and without modification,
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* are permitted provided that this entire comment appears intact.
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*
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* Redistribution in binary form may occur without any restrictions.
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* Obviously, it would be nice if you gave credit where credit is due
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* but requiring it would be too onerous.
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*
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* This software is provided ``AS IS'' without any warranties of any kind.
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*
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* Device configuration to kernel image saving utility.
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*/
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#include <stdio.h>
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#include <nlist.h>
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#include <paths.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <a.out.h>
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#include <kvm.h>
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#include <limits.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <sys/uio.h>
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#include <sys/param.h>
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#include <machine/param.h>
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#include "i386/isa/isa_device.h"
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#define TRUE 1
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#define FALSE 0
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extern int errno;
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struct nlist nl[] = {
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#define N_TABTTY 0
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{"_isa_devtab_tty"},
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#define N_TABBIO 1
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{"_isa_devtab_bio"},
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#define N_TABNET 2
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{"_isa_devtab_net"},
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#define N_TABNULL 3
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{"_isa_devtab_null"},
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"",
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};
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#define N_TABLAST N_TABNULL
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struct nlist nlk[] = {
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{"_isa_devtab_tty"},
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{"_isa_devtab_bio"},
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{"_isa_devtab_net"},
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{"_isa_devtab_null"},
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"",
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};
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int quiet = FALSE;
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void
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fatal(name, str)
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char *name, *str;
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{
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if (quiet)
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exit(1);
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if (str)
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fprintf(stderr, "%s : %s\n", name, str);
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else
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perror(name);
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exit(1);
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}
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void
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error(name, str)
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char *name, *str;
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{
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if (quiet)
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return;
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if (str)
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fprintf(stderr, "%s : %s\n", name, str);
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else
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perror(name);
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}
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void
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usage(char *title)
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{
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fprintf(stderr, "usage: %s [-qtv]\n", title);
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}
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main(ac, av)
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int ac;
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char **av;
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{
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int f, res, s;
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int modified;
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int sym;
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u_long pos, entry, pos1;
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u_long flags;
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struct isa_device buf, buf1;
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struct isa_driver dbuf;
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char nbuf[5];
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struct stat fst;
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struct exec es;
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kvm_t *kd;
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static char errb[_POSIX2_LINE_MAX];
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const char *kernel;
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extern char *optarg;
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char ch;
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int testonly = FALSE;
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int verbose = FALSE;
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while ((ch = getopt(ac, av, "qtv")) != EOF)
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switch (ch) {
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case 'q':
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quiet = TRUE;
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break;
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case 't':
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testonly = TRUE;
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/* In test mode we want to be verbose */
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case 'v':
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verbose = TRUE;
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break;
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case '?':
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default:
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usage(av[0]);
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exit(1);
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}
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kernel = getbootfile();
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if (verbose)
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printf("Boot image: %s\n", kernel);
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if (!(kd = kvm_open(NULL, NULL, NULL, O_RDONLY, errb)))
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fatal("kvm_open", NULL);
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if (kvm_nlist(kd, nlk) != 0)
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fatal("kvm_nlist", NULL);
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if (nlk[0].n_type == 0)
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fatal("kvm_nlist", "bad symbol type");
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if (nlist(kernel, nl) != 0)
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fatal("nlist", NULL);
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if (nl[0].n_type == 0)
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fatal("nlist", "bad symbol type");
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if (stat(kernel, &fst) < 0)
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fatal("stat", NULL);
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flags = fst.st_flags;
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if (chflags(kernel, (u_long) 0) < 0)
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fatal("chflags", NULL);
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if ((f = open(kernel, O_RDWR)) <= 0)
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fatal("open", NULL);
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if (read(f, &es, sizeof(struct exec)) <= 0)
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fatal("read header", NULL);
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entry = es.a_entry;
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for (sym = 0; sym <= N_TABLAST; sym++) {
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if (verbose)
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printf("\nTable: %s\n", nl[sym].n_name);
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pos = nl[sym].n_value + NBPG - entry;
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pos1 = nlk[sym].n_value;
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if (lseek(f, pos, SEEK_SET) != pos)
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fatal("seek", NULL);
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do {
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if (verbose)
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printf("----------------------------------------------------\n");
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if (kvm_read(kd, pos1, &buf1, sizeof(struct isa_device)) < 0)
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fatal("kvmread", NULL);
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if (buf1.id_id)
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if (buf1.id_driver)
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if (kvm_read(kd, (u_long) buf1.id_driver,
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&dbuf, sizeof(struct isa_driver)) < 0) {
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error("kvm_read", "no driver");
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} else {
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if (kvm_read(kd, (u_long) dbuf.name,
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nbuf, sizeof(nbuf)) < 0) {
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error("kvm_read", NULL);
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} else {
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nbuf[sizeof(nbuf) - 1] = 0;
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if (verbose)
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printf("Device: %s%d\n", nbuf, buf1.id_unit);
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}
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}
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else
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error("kvm_read", "no driver");
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pos1 += sizeof(struct isa_device);
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if ((res = read(f, (char *) &buf, sizeof(struct isa_device)))
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<= 0)
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fatal("read", NULL);
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if (buf1.id_id != 0)
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if (verbose)
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printf("kernel: id=%u io=%X irq=%u drq=%X maddr=%X flags=%X enabled=%X \n", buf1.id_id, buf1.id_iobase, buf1.id_irq, buf1.id_drq,
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buf1.id_maddr, buf1.id_flags, buf1.id_enabled);
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if (buf.id_id != 0)
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if (verbose)
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printf("file: id=%u io=%X irq=%u drq=%X maddr=%X flags=%X enabled=%X \n", buf.id_id, buf.id_iobase, buf.id_irq, buf.id_drq,
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buf.id_maddr, buf.id_flags, buf.id_enabled);
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/*
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* OK,now we'd compare values and set'em from kernel.
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*/
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modified = FALSE;
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if (buf.id_id != buf1.id_id) {
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fprintf(stderr, "IDs don't match. Aborting\n");
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exit(1);
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}
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if (buf.id_iobase != 0xFFFFFFFF && buf.id_iobase !=
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buf1.id_iobase) {
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if (verbose)
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printf("Setting IO addr\n");
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buf.id_iobase = buf1.id_iobase;
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modified = TRUE;
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}
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if (buf.id_irq != buf1.id_irq) {
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if (verbose)
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printf("Setting IRQ\n");
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buf.id_irq = buf1.id_irq;
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modified = TRUE;
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}
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if (buf.id_drq != buf1.id_drq) {
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if (verbose)
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printf("Setting DRQ\n");
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buf.id_drq = buf1.id_drq;
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modified = TRUE;
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}
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if (buf.id_maddr != buf1.id_maddr) {
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if (verbose)
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printf("Setting memory addres\n");
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buf.id_maddr = buf1.id_maddr;
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modified = TRUE;
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}
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if (buf.id_flags != buf1.id_flags) {
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if (verbose)
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printf("Setting flags\n");
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buf.id_flags = buf1.id_flags;
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modified = TRUE;
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}
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if (buf.id_enabled != buf1.id_enabled) {
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if (verbose)
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printf("Setting device enable/disable\n");
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buf.id_enabled = buf1.id_enabled;
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modified = TRUE;
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}
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if (modified && !testonly) {
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res = lseek(f, -(off_t) sizeof(struct isa_device),
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SEEK_CUR);
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if (write(f, &buf, sizeof(struct isa_device)) <= 0)
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fatal("write", NULL);
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}
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} while (buf.id_id != 0 && buf1.id_id != 0);
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}
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if (chflags(kernel, flags) < 0)
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fatal("chflags restore", NULL);
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kvm_close(kd);
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close(f);
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}
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