763 lines
16 KiB
C
763 lines
16 KiB
C
/* $NetBSD: kdump.c,v 1.59 2003/08/07 11:14:13 agc Exp $ */
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/*-
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* Copyright (c) 1988, 1993
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* The Regents of the University of California. 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. 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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#include <sys/cdefs.h>
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#ifndef lint
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__COPYRIGHT("@(#) Copyright (c) 1988, 1993\n\
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The Regents of the University of California. All rights reserved.\n");
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#endif /* not lint */
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)kdump.c 8.4 (Berkeley) 4/28/95";
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#else
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__RCSID("$NetBSD: kdump.c,v 1.59 2003/08/07 11:14:13 agc Exp $");
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#endif
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#endif /* not lint */
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#include <sys/param.h>
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#define _KERNEL
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#include <sys/errno.h>
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#undef _KERNEL
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#include <sys/time.h>
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#include <sys/uio.h>
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#include <sys/ktrace.h>
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#include <sys/ioctl.h>
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#include <sys/ptrace.h>
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#include <ctype.h>
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#include <err.h>
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#include <signal.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <vis.h>
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#include "ktrace.h"
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#include "setemul.h"
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#include <sys/syscall.h>
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int timestamp, decimal, plain, tail, maxdata = -1, numeric;
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int hexdump;
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pid_t do_pid = -1;
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const char *tracefile = NULL;
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struct ktr_header ktr_header;
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int emul_changed = 0;
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#define eqs(s1, s2) (strcmp((s1), (s2)) == 0)
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static const char *ptrace_ops[] = {
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"PT_TRACE_ME", "PT_READ_I", "PT_READ_D", "PT_READ_U",
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"PT_WRITE_I", "PT_WRITE_D", "PT_WRITE_U", "PT_CONTINUE",
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"PT_KILL", "PT_ATTACH", "PT_DETACH",
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};
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static const char *linux_ptrace_ops[] = {
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"PTRACE_TRACEME",
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"PTRACE_PEEKTEXT", "PTRACE_PEEKDATA", "PTRACE_PEEKUSER",
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"PTRACE_POKETEXT", "PTRACE_POKEDATA", "PTRACE_POKEUSER",
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"PTRACE_CONT", "PTRACE_KILL", "PTRACE_SINGLESTEP",
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NULL, NULL,
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"PTRACE_GETREGS", "PTRACE_SETREGS", "PTRACE_GETFPREGS",
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"PTRACE_SETFPREGS", "PTRACE_ATTACH", "PTRACE_DETACH",
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"PTRACE_SYSCALL",
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};
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int main __P((int, char **));
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int fread_tail __P((char *, int, int));
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int dumpheader __P((struct ktr_header *));
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void ioctldecode __P((u_long));
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void ktrsyscall __P((struct ktr_syscall *));
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void ktrsysret __P((struct ktr_sysret *, int));
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void ktrnamei __P((char *, int));
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void ktremul __P((char *, int, int));
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void ktrgenio __P((struct ktr_genio *, int));
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void ktrpsig __P((struct ktr_psig *));
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void ktrcsw __P((struct ktr_csw *));
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void ktruser __P((struct ktr_user *, int));
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void ktrmmsg __P((struct ktr_mmsg *, int));
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void usage __P((void));
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void eprint __P((int));
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void rprint __P((register_t));
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char *ioctlname __P((long));
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static const char *signame __P((long, int));
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static void hexdump_buf(const void *, int);
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static void visdump_buf(const void *, int, int);
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int
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main(argc, argv)
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int argc;
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char *argv[];
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{
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int ch, ktrlen, size;
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void *m;
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int trpoints = 0;
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int trset = 0;
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const char *emul_name = "netbsd";
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int col;
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while ((ch = getopt(argc, argv, "e:f:dlm:Nnp:RTt:x")) != -1)
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switch (ch) {
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case 'e':
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emul_name = strdup(optarg); /* it's safer to copy it */
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break;
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case 'f':
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tracefile = optarg;
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break;
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case 'd':
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decimal = 1;
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break;
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case 'l':
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tail = 1;
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break;
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case 'p':
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do_pid = atoi(optarg);
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break;
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case 'm':
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maxdata = atoi(optarg);
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break;
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case 'N':
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numeric++;
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break;
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case 'n':
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plain++;
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break;
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case 'R':
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timestamp = 2; /* relative timestamp */
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break;
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case 'T':
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timestamp = 1;
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break;
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case 't':
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trset = 1;
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trpoints = getpoints(trpoints, optarg);
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if (trpoints < 0)
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errx(1, "unknown trace point in %s", optarg);
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break;
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case 'x':
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hexdump = 1;
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break;
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default:
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usage();
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}
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argv += optind;
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argc -= optind;
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if (!trset)
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trpoints = ALL_POINTS;
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if (tracefile == NULL) {
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if (argc == 1) {
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tracefile = argv[0];
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argv++;
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argc--;
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}
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else
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tracefile = DEF_TRACEFILE;
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}
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if (argc > 0)
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usage();
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setemul(emul_name, 0, 0);
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mach_lookup_emul();
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m = malloc(size = 1024);
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if (m == NULL)
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errx(1, "malloc: %s", strerror(ENOMEM));
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if (!freopen(tracefile, "r", stdin))
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err(1, "%s", tracefile);
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while (fread_tail((char *)&ktr_header, sizeof(struct ktr_header), 1)) {
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if (trpoints & (1<<ktr_header.ktr_type)
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&& (do_pid == -1 || ktr_header.ktr_pid == do_pid))
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col = dumpheader(&ktr_header);
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else
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col = -1;
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if ((ktrlen = ktr_header.ktr_len) < 0)
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errx(1, "bogus length 0x%x", ktrlen);
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if (ktrlen > size) {
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while (ktrlen > size)
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size *= 2;
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m = realloc(m, size);
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if (m == NULL)
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errx(1, "realloc: %s", strerror(ENOMEM));
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}
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if (ktrlen && fread_tail(m, ktrlen, 1) == 0)
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errx(1, "data too short");
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if (col == -1)
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continue;
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/* update context to match currently processed record */
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ectx_sanify(ktr_header.ktr_pid);
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switch (ktr_header.ktr_type) {
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case KTR_SYSCALL:
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ktrsyscall(m);
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break;
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case KTR_SYSRET:
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ktrsysret(m, ktrlen);
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break;
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case KTR_NAMEI:
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ktrnamei(m, ktrlen);
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break;
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case KTR_GENIO:
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ktrgenio(m, ktrlen);
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break;
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case KTR_PSIG:
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ktrpsig(m);
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break;
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case KTR_CSW:
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ktrcsw(m);
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break;
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case KTR_EMUL:
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ktremul(m, ktrlen, size);
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break;
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case KTR_USER:
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ktruser(m, ktrlen);
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break;
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case KTR_MMSG:
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ktrmmsg(m, ktrlen);
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break;
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case KTR_EXEC_ARG:
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case KTR_EXEC_ENV:
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visdump_buf(m, ktrlen, col);
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break;
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default:
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printf("\n");
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hexdump_buf(m, ktrlen);
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}
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if (tail)
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(void)fflush(stdout);
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}
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return (0);
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}
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int
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fread_tail(buf, size, num)
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char *buf;
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int num, size;
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{
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int i;
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while ((i = fread(buf, size, num, stdin)) == 0 && tail) {
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(void)sleep(1);
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clearerr(stdin);
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}
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return (i);
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}
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int
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dumpheader(kth)
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struct ktr_header *kth;
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{
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char unknown[64], *type;
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static struct timeval prevtime;
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struct timeval temp;
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int col;
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switch (kth->ktr_type) {
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case KTR_SYSCALL:
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type = "CALL";
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break;
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case KTR_SYSRET:
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type = "RET ";
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break;
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case KTR_NAMEI:
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type = "NAMI";
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break;
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case KTR_GENIO:
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type = "GIO ";
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break;
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case KTR_PSIG:
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type = "PSIG";
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break;
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case KTR_CSW:
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type = "CSW";
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break;
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case KTR_EMUL:
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type = "EMUL";
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break;
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case KTR_USER:
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type = "USER";
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break;
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case KTR_MMSG:
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type = "MMSG";
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break;
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case KTR_EXEC_ENV:
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type = "ENV";
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break;
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case KTR_EXEC_ARG:
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type = "ARG";
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break;
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default:
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(void)sprintf(unknown, "UNKNOWN(%d)", kth->ktr_type);
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type = unknown;
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}
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col = printf("%6d %-8.*s ", kth->ktr_pid, MAXCOMLEN, kth->ktr_comm);
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if (timestamp) {
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if (timestamp == 2) {
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if (prevtime.tv_sec == 0)
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temp.tv_sec = temp.tv_usec = 0;
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else
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timersub(&kth->ktr_time, &prevtime, &temp);
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prevtime = kth->ktr_time;
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} else
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temp = kth->ktr_time;
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col += printf("%ld.%06ld ",
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(long int)temp.tv_sec, (long int)temp.tv_usec);
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}
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col += printf("%-4s ", type);
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return col;
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}
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void
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ioctldecode(cmd)
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u_long cmd;
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{
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char dirbuf[4], *dir = dirbuf;
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if (cmd & IOC_IN)
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*dir++ = 'W';
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if (cmd & IOC_OUT)
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*dir++ = 'R';
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*dir = '\0';
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printf(decimal ? ",_IO%s('%c',%ld" : ",_IO%s('%c',%#lx",
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dirbuf, (int) ((cmd >> 8) & 0xff), cmd & 0xff);
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if ((cmd & IOC_VOID) == 0)
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printf(decimal ? ",%ld)" : ",%#lx)", (cmd >> 16) & 0xff);
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else
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printf(")");
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}
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void
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ktrsyscall(ktr)
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struct ktr_syscall *ktr;
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{
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int argsize = ktr->ktr_argsize;
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const struct emulation *revelant = current;
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register_t *ap;
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if (((ktr->ktr_code >= revelant->nsysnames || ktr->ktr_code < 0)
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&& (mach_traps_dispatch(&ktr->ktr_code, &revelant) == 0)) ||
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numeric)
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(void)printf("[%d]", ktr->ktr_code);
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else
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(void)printf("%s", revelant->sysnames[ktr->ktr_code]);
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ap = (register_t *)((char *)ktr + sizeof(struct ktr_syscall));
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if (argsize) {
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char c = '(';
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if (!plain) {
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char *cp;
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switch (ktr->ktr_code) {
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case SYS_ioctl:
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if (decimal)
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(void)printf("(%ld", (long)*ap);
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else
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(void)printf("(%#lx", (long)*ap);
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ap++;
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argsize -= sizeof(register_t);
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if ((cp = ioctlname(*ap)) != NULL)
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(void)printf(",%s", cp);
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else
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ioctldecode(*ap);
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c = ',';
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ap++;
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argsize -= sizeof(register_t);
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break;
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case SYS_ptrace:
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if (strcmp(revelant->name, "linux") == 0) {
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if (*ap >= 0 && *ap <=
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sizeof(linux_ptrace_ops) /
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sizeof(linux_ptrace_ops[0]))
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(void)printf("(%s",
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linux_ptrace_ops[*ap]);
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else
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(void)printf("(%ld", (long)*ap);
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} else {
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if (*ap >= 0 && *ap <=
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sizeof(ptrace_ops) / sizeof(ptrace_ops[0]))
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(void)printf("(%s", ptrace_ops[*ap]);
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else
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(void)printf("(%ld", (long)*ap);
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}
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c = ',';
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ap++;
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argsize -= sizeof(register_t);
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break;
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case SYS_kill:
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if (decimal)
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(void)printf("(%ld, SIG%s",
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(long)ap[0], signame(ap[1], 1));
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else
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(void)printf("(%#lx, SIG%s",
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(long)ap[0], signame(ap[1], 1));
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ap += 2;
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argsize -= 2 * sizeof(register_t);
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break;
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default:
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/* No special handling */
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break;
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}
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}
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while (argsize) {
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if (decimal)
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(void)printf("%c%ld", c, (long)*ap);
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else
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(void)printf("%c%#lx", c, (long)*ap);
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c = ',';
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ap++;
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argsize -= sizeof(register_t);
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}
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(void)putchar(')');
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}
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(void)putchar('\n');
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}
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void
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ktrsysret(ktr, len)
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struct ktr_sysret *ktr;
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int len;
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{
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const struct emulation *revelant;
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int error = ktr->ktr_error;
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int code = ktr->ktr_code;
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if (emul_changed)
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revelant = previous;
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else
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revelant = current;
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emul_changed = 0;
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if ((code >= revelant->nsysnames || code < 0 || plain > 1)
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&& (mach_traps_dispatch(&code, &revelant) == 0))
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(void)printf("[%d] ", code);
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else
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(void)printf("%s ", revelant->sysnames[code]);
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switch (error) {
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case 0:
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rprint(ktr->ktr_retval);
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if (len > offsetof(struct ktr_sysret, ktr_retval_1) &&
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ktr->ktr_retval_1 != 0) {
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(void)printf(", ");
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rprint(ktr->ktr_retval_1);
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}
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break;
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default:
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eprint(error);
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break;
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}
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(void)putchar('\n');
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}
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void
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rprint(register_t ret)
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{
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if (!plain) {
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(void)printf("%ld", (long)ret);
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if (ret < 0 || ret > 9)
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(void)printf("/%#lx", (long)ret);
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} else {
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if (decimal)
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(void)printf("%ld", (long)ret);
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else
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(void)printf("%#lx", (long)ret);
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}
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}
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/*
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* We print the original emulation's error numerically, but we
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* translate it to netbsd to print it symbolically.
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*/
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void
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eprint(e)
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int e;
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{
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int i = e;
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if (current->errnomap) {
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/* No remapping for ERESTART and EJUSTRETURN */
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/* Kludge for linux that has negative error numbers */
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if (current->errnomap[2] > 0 && e < 0)
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goto normal;
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for (i = 0; i < current->nerrnomap; i++)
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if (e == current->errnomap[i])
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break;
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if (i == current->nerrnomap) {
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printf("-1 unknown errno %d", e);
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return;
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}
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}
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normal:
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switch (i) {
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case ERESTART:
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(void)printf("RESTART");
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break;
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case EJUSTRETURN:
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(void)printf("JUSTRETURN");
|
|
break;
|
|
|
|
default:
|
|
(void)printf("-1 errno %d", e);
|
|
if (!plain)
|
|
(void)printf(" %s", strerror(i));
|
|
}
|
|
}
|
|
|
|
void
|
|
ktrnamei(cp, len)
|
|
char *cp;
|
|
int len;
|
|
{
|
|
|
|
(void)printf("\"%.*s\"\n", len, cp);
|
|
}
|
|
|
|
void
|
|
ktremul(name, len, bufsize)
|
|
char *name;
|
|
int len, bufsize;
|
|
{
|
|
if (len >= bufsize)
|
|
len = bufsize - 1;
|
|
|
|
name[len] = '\0';
|
|
setemul(name, ktr_header.ktr_pid, 1);
|
|
emul_changed = 1;
|
|
|
|
(void)printf("\"%s\"\n", name);
|
|
}
|
|
|
|
static void
|
|
hexdump_buf(const void *vdp, int datalen)
|
|
{
|
|
char chars[16];
|
|
const unsigned char *dp = vdp;
|
|
int line_end, off, l, c;
|
|
char *cp;
|
|
|
|
for (off = 0; off < datalen;) {
|
|
line_end = off + 16;
|
|
if (line_end > datalen)
|
|
line_end = datalen;
|
|
printf("\t%3.3x ", off);
|
|
for (l = 0, cp = chars; off < line_end; off++) {
|
|
c = *dp++;
|
|
if ((off & 7) == 0)
|
|
l += printf(" ");
|
|
l += printf(" %2.2x", c);
|
|
*cp++ = isgraph(c) ? c : '.';
|
|
};
|
|
printf("%*s %.*s\n", 50 - l, "", (int)(cp - chars), chars);
|
|
}
|
|
}
|
|
|
|
static void
|
|
visdump_buf(const void *vdp, int datalen, int col)
|
|
{
|
|
const unsigned char *dp = vdp;
|
|
char *cp;
|
|
int width;
|
|
char visbuf[5];
|
|
static int screenwidth = 0;
|
|
|
|
if (screenwidth == 0) {
|
|
struct winsize ws;
|
|
|
|
if (!plain && ioctl(fileno(stderr), TIOCGWINSZ, &ws) != -1 &&
|
|
ws.ws_col > 8)
|
|
screenwidth = ws.ws_col;
|
|
else
|
|
screenwidth = 80;
|
|
}
|
|
|
|
(void)printf("\"");
|
|
col++;
|
|
for (; datalen > 0; datalen--, dp++) {
|
|
(void)svis(visbuf, *dp, VIS_CSTYLE,
|
|
datalen > 1 ? *(dp + 1) : 0, "\"");
|
|
cp = visbuf;
|
|
/*
|
|
* Keep track of printables and
|
|
* space chars (like fold(1)).
|
|
*/
|
|
if (col == 0) {
|
|
(void)putchar('\t');
|
|
col = 8;
|
|
}
|
|
switch(*cp) {
|
|
case '\n':
|
|
col = 0;
|
|
(void)putchar('\n');
|
|
continue;
|
|
case '\t':
|
|
width = 8 - (col & 07);
|
|
break;
|
|
default:
|
|
width = strlen(cp);
|
|
}
|
|
if (col + width > (screenwidth - 2)) {
|
|
(void)printf("\\\n\t");
|
|
col = 8;
|
|
}
|
|
col += width;
|
|
do {
|
|
(void)putchar(*cp++);
|
|
} while (*cp);
|
|
}
|
|
if (col == 0)
|
|
(void)printf(" ");
|
|
(void)printf("\"\n");
|
|
}
|
|
|
|
void
|
|
ktrgenio(ktr, len)
|
|
struct ktr_genio *ktr;
|
|
int len;
|
|
{
|
|
int datalen = len - sizeof (struct ktr_genio);
|
|
char *dp = (char *)ktr + sizeof (struct ktr_genio);
|
|
|
|
printf("fd %d %s %d bytes\n", ktr->ktr_fd,
|
|
ktr->ktr_rw == UIO_READ ? "read" : "wrote", datalen);
|
|
if (maxdata == 0)
|
|
return;
|
|
if (maxdata > 0 && datalen > maxdata)
|
|
datalen = maxdata;
|
|
if (hexdump) {
|
|
hexdump_buf(dp, datalen);
|
|
return;
|
|
}
|
|
(void)printf(" ");
|
|
visdump_buf(dp, datalen, 7);
|
|
}
|
|
|
|
void
|
|
ktrpsig(psig)
|
|
struct ktr_psig *psig;
|
|
{
|
|
int signo, first;
|
|
|
|
(void)printf("SIG%s ", signame(psig->signo, 0));
|
|
if (psig->action == SIG_DFL)
|
|
(void)printf("SIG_DFL\n");
|
|
else {
|
|
(void)printf("caught handler=0x%lx mask=(",
|
|
(u_long)psig->action);
|
|
first = 1;
|
|
for (signo = 1; signo < NSIG; signo++) {
|
|
if (sigismember(&psig->mask, signo)) {
|
|
if (first)
|
|
first = 0;
|
|
else
|
|
(void)printf(",");
|
|
(void)printf("%d", signo);
|
|
}
|
|
}
|
|
(void)printf(") code=0x%x\n", psig->code);
|
|
}
|
|
}
|
|
|
|
void
|
|
ktrcsw(cs)
|
|
struct ktr_csw *cs;
|
|
{
|
|
|
|
(void)printf("%s %s\n", cs->out ? "stop" : "resume",
|
|
cs->user ? "user" : "kernel");
|
|
}
|
|
|
|
void
|
|
ktruser(usr, len)
|
|
struct ktr_user *usr;
|
|
int len;
|
|
{
|
|
int i;
|
|
unsigned char *dta;
|
|
|
|
printf("\"%.*s: %d, ", KTR_USER_MAXIDLEN, usr->ktr_id, len);
|
|
dta = (unsigned char *)usr;
|
|
for(i=sizeof(struct ktr_user); i < len; i++)
|
|
printf("%02x", (unsigned int) dta[i]);
|
|
printf("\"\n");
|
|
}
|
|
|
|
void
|
|
ktrmmsg(mmsg, len)
|
|
struct ktr_mmsg *mmsg;
|
|
int len;
|
|
{
|
|
printf("id %d [0x%x -> 0x%x] flags 0x%x\n",
|
|
mmsg->ktr_id, mmsg->ktr_local_port,
|
|
mmsg->ktr_remote_port, mmsg->ktr_bits);
|
|
|
|
hexdump_buf(mmsg, len);
|
|
}
|
|
|
|
static const char *
|
|
signame(long sig, int xlat)
|
|
{
|
|
static char buf[64];
|
|
if (sig == 0)
|
|
return " 0";
|
|
else if (sig < 0 || sig >= NSIG) {
|
|
(void)snprintf(buf, sizeof(buf), "*unknown %ld*", sig);
|
|
return buf;
|
|
} else
|
|
return sys_signame[(xlat && current->signalmap != NULL) ?
|
|
current->signalmap[sig] : sig];
|
|
}
|
|
|
|
void
|
|
usage()
|
|
{
|
|
|
|
(void)fprintf(stderr, "usage: kdump [-dlNnRTx] [-e emulation] "
|
|
"[-f file] [-m maxdata] [-p pid]\n [-t trstr] "
|
|
"[file]\n");
|
|
exit(1);
|
|
}
|