e2391a87b6
systems with only one serial port for console, etc., to have at least some basic access to remote-kgdb-over-serial, even if it is a bit awkward.
109 lines
2.8 KiB
C
109 lines
2.8 KiB
C
/* $NetBSD: db_trap.c,v 1.21 2003/04/28 02:49:55 briggs Exp $ */
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/*
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* Mach Operating System
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* Copyright (c) 1991,1990 Carnegie Mellon University
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* All Rights Reserved.
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*
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* Permission to use, copy, modify and distribute this software and its
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* documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
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* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie the
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* rights to redistribute these changes.
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*
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* Author: David B. Golub, Carnegie Mellon University
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* Date: 7/90
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*/
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/*
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* Trap entry point to kernel debugger.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: db_trap.c,v 1.21 2003/04/28 02:49:55 briggs Exp $");
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#include <sys/param.h>
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#include <sys/proc.h>
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#include <machine/db_machdep.h>
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#include <ddb/db_run.h>
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#include <ddb/db_command.h>
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#include <ddb/db_break.h>
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#include <ddb/db_output.h>
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#include <ddb/db_sym.h>
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#include <ddb/db_extern.h>
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/*
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* db_trap_callback can be hooked by MD port code to handle special
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* cases such as disabling hardware watchdogs while in DDB.
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*/
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void (*db_trap_callback)(int);
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int db_trap_type;
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void
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db_trap(int type, int code)
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{
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boolean_t bkpt;
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boolean_t watchpt;
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db_trap_type = type;
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bkpt = IS_BREAKPOINT_TRAP(type, code);
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watchpt = IS_WATCHPOINT_TRAP(type, code);
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if (db_trap_callback) db_trap_callback(1);
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if (db_stop_at_pc(DDB_REGS, &bkpt)) {
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if (db_inst_count) {
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db_printf("After %d instructions "
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"(%d loads, %d stores),\n",
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db_inst_count, db_load_count, db_store_count);
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}
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if (curlwp != NULL) {
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if (bkpt)
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db_printf("Breakpoint");
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else if (watchpt)
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db_printf("Watchpoint");
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else
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db_printf("Stopped");
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if (curproc == NULL)
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db_printf("; curlwp = %p,"
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" curproc is NULL at\t", curlwp);
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else
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db_printf(" in pid %d.%d (%s) at\t",
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curproc->p_pid, curlwp->l_lid,
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curproc->p_comm);
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} else if (bkpt)
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db_printf("Breakpoint at\t");
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else if (watchpt)
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db_printf("Watchpoint at\t");
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else
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db_printf("Stopped at\t");
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db_dot = PC_REGS(DDB_REGS);
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db_print_loc_and_inst(db_dot);
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db_command_loop();
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}
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db_restart_at_pc(DDB_REGS, watchpt);
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if (db_trap_callback)
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db_trap_callback(0);
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}
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