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/*
* Mach Operating System
* Copyright (c) 1991,1990 Carnegie Mellon University
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie Mellon
* the rights to redistribute these changes.
*/
/*
* Author: David B. Golub, Carnegie Mellon University
* Date: 7/90
*/
#if MACH_KDB
/*
* Trap entry point to kernel debugger.
*/
#include <mach/boolean.h>
#include <machine/db_machdep.h>
#include <machine/setjmp.h>
#include <ddb/db_command.h>
#include <ddb/db_access.h>
#include <ddb/db_break.h>
#include <ddb/db_examine.h>
#include <ddb/db_output.h>
#include <ddb/db_task_thread.h>
#include <ddb/db_trap.h>
#include <ddb/db_run.h>
#include <machine/db_interface.h>
#include <kern/lock.h>
extern jmp_buf_t *db_recover;
extern int db_inst_count;
extern int db_load_count;
extern int db_store_count;
void
db_task_trap(
int type,
int code,
boolean_t user_space)
{
jmp_buf_t db_jmpbuf;
jmp_buf_t *prev;
boolean_t bkpt;
boolean_t watchpt;
task_t task_space;
check_simple_locks_disable();
task_space = db_target_space(current_thread(), user_space);
bkpt = IS_BREAKPOINT_TRAP(type, code);
watchpt = IS_WATCHPOINT_TRAP(type, code);
db_init_default_thread();
db_check_breakpoint_valid();
if (db_stop_at_pc(&bkpt, task_space)) {
if (db_inst_count) {
db_printf("After %d instructions (%d loads, %d stores),\n",
db_inst_count, db_load_count, db_store_count);
}
if (bkpt)
db_printf("Breakpoint at ");
else if (watchpt)
db_printf("Watchpoint at ");
else
db_printf("Stopped at ");
db_dot = PC_REGS(DDB_REGS);
prev = db_recover;
if (_setjmp(db_recover = &db_jmpbuf) == 0)
db_print_loc_and_inst(db_dot, task_space);
else
db_printf("Trouble printing location %#X.\n", db_dot);
if (!bkpt && !watchpt && _setjmp(db_recover = &db_jmpbuf) == 0)
db_stack_trace_cmd(0, 0, -1, "");
db_recover = prev;
db_command_loop();
}
check_simple_locks_enable();
db_restart_at_pc(watchpt, task_space);
}
void
db_trap(
int type,
int code)
{
db_task_trap(type, code, !DB_VALID_KERN_ADDR(PC_REGS(DDB_REGS)));
}
#endif /* MACH_KDB */
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