usr/src/cmd/mdb/common/kmdb/kmdb_stubs.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26 /*
  27  * Stubs for basic system services otherwise unavailable to the debugger.
  28  */
  29
  30 #include <stdlib.h>
  31 #include <unistd.h>
  32 #include <libproc.h>
  33 #include <sys/time.h>
  34
  35 #include <kmdb/kmdb_dpi.h>
  36 #include <kmdb/kmdb_promif.h>
  37 #include <kmdb/kmdb_io.h>
  38 #include <mdb/mdb_debug.h>
  39 #include <mdb/mdb_signal.h>
  40 #include <mdb/mdb_io_impl.h>
  41 #include <mdb/mdb.h>
  42
  43 /*ARGSUSED*/
  44 char *
  45 getenv(const char *name)
  46 {
  47         /* There aren't any environment variables here */
  48         return (NULL);
  49 }
  50
  51 char *
  52 strerror(int errnum)
  53 {
  54         static char errnostr[16];
  55
  56         (void) mdb_snprintf(errnostr, sizeof (errnostr), "Error %d", errnum);
  57
  58         return (errnostr);
  59 }
  60
  61 pid_t
  62 getpid(void)
  63 {
  64         return (1);
  65 }
  66
  67 /*
  68  * We're trying to isolate ourselves from the rest of the world as much as
  69  * possible, so we can't rely on the time in the kernel proper.  For now, we
  70  * just bump a counter whenever time is requested, thus guaranteeing that
  71  * things with timestamps can be compared according to order of occurrance.
  72  */
  73 hrtime_t
  74 gethrtime(void)
  75 {
  76         static hrtime_t kmdb_timestamp;
  77
  78         return (++kmdb_timestamp);
  79 }
  80
  81 /*
  82  * Signal handling
  83  */
  84
  85 /*ARGSUSED*/
  86 int
  87 sigemptyset(sigset_t *set)
  88 {
  89         return (0);
  90 }
  91
  92 /*ARGSUSED*/
  93 int
  94 sigaddset(sigset_t *set, int signo)
  95 {
  96         return (0);
  97 }
  98
  99 /*ARGSUSED*/
 100 int
 101 sigfillset(sigset_t *set)
 102 {
 103         return (0);
 104 }
 105
 106 /*ARGSUSED*/
 107 int
 108 sigprocmask(int how, const sigset_t *set, sigset_t *oset)
 109 {
 110         return (0);
 111 }
 112
 113 /*ARGSUSED*/
 114 int
 115 sigaction(int sig, const struct sigaction *act, struct sigaction *oact)
 116 {
 117         return (0);
 118 }
 119
 120 /*ARGSUSED*/
 121 int
 122 kill(pid_t pid, int sig)
 123 {
 124         if (sig == SIGABRT) {
 125                 mdb_printf("Debugger aborted\n");
 126                 exit(1);
 127         }
 128
 129         return (0);
 130 }
 131
 132 /*ARGSUSED*/
 133 int
 134 proc_str2flt(const char *buf, int *ptr)
 135 {
 136         return (-1);
 137 }
 138
 139 /*ARGSUSED*/
 140 int
 141 proc_str2sig(const char *buf, int *ptr)
 142 {
 143         return (-1);
 144 }
 145
 146 /*ARGSUSED*/
 147 int
 148 proc_str2sys(const char *buf, int *ptr)
 149 {
 150         return (-1);
 151 }
 152
 153 /*ARGSUSED*/
 154 void
 155 exit(int status)
 156 {
 157         extern void kmdb_dpi_reboot(void) __NORETURN;
 158         static int recurse = 0;
 159
 160         if (!recurse) {
 161
 162                 recurse = 1;
 163
 164                 mdb_iob_printf(mdb.m_out, "Press any key to reboot\n");
 165                 mdb_iob_flush(mdb.m_out);
 166                 mdb_iob_clearlines(mdb.m_out);
 167
 168                 (void) kmdb_getchar();
 169         }
 170
 171         kmdb_dpi_reboot();
 172 }