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diff --git a/sys/arch/arm/include/db_machdep.h b/sys/arch/arm/include/db_machdep.h
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+/* $OpenBSD: db_machdep.h,v 1.1 2004/02/01 05:09:49 drahn Exp $ */
+/* $NetBSD: db_machdep.h,v 1.5 2001/11/22 18:00:00 thorpej Exp $ */
+
+/*
+ * Copyright (c) 1996 Scott K Stevens
+ *
+ * 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.
+ */
+
+#ifndef _ARM_DB_MACHDEP_H_
+#define _ARM_DB_MACHDEP_H_
+
+/*
+ * Machine-dependent defines for new kernel debugger.
+ */
+
+#include <uvm/uvm_extern.h>
+#include <arm/armreg.h>
+#include <machine/frame.h>
+#include <machine/trap.h>
+
+/* end of mangling */
+
+typedef vaddr_t db_addr_t; /* address - unsigned */
+typedef long db_expr_t; /* expression - signed */
+
+typedef trapframe_t db_regs_t;
+
+extern db_regs_t ddb_regs; /* register state */
+#define DDB_REGS (&ddb_regs)
+
+#ifdef __PROG26
+#define PC_REGS(regs) ((db_addr_t)(regs)->tf_r15 & R15_PC)
+#define PC_ADVANCE(regs) ((regs)->tf_r15 += 4)
+#else
+#define PC_REGS(regs) ((db_addr_t)(regs)->tf_pc)
+#endif
+
+#define BKPT_INST (KERNEL_BREAKPOINT) /* breakpoint instruction */
+#define BKPT_SIZE (INSN_SIZE) /* size of breakpoint inst */
+#define BKPT_SET(inst) (BKPT_INST)
+
+/*#define FIXUP_PC_AFTER_BREAK(regs) ((regs)->tf_pc -= BKPT_SIZE)*/
+
+#define T_BREAKPOINT (1)
+
+#define IS_BREAKPOINT_TRAP(type, code) ((type) == T_BREAKPOINT)
+#define IS_WATCHPOINT_TRAP(type, code) (0)
+
+#define inst_trap_return(ins) (0)
+/* ldmxx reg, {..., pc}
+ 01800000 stack mode
+ 000f0000 register
+ 0000ffff register list */
+/* mov pc, reg
+ 0000000f register */
+#define inst_return(ins) (((ins) & 0x0e108000) == 0x08108000 || \
+ ((ins) & 0x0ff0fff0) == 0x01a0f000)
+/* bl ...
+ 00ffffff offset>>2 */
+#define inst_call(ins) (((ins) & 0x0f000000) == 0x0b000000)
+/* b ...
+ 00ffffff offset>>2 */
+/* ldr pc, [pc, reg, lsl #2]
+ 0000000f register */
+#define inst_branch(ins) (((ins) & 0x0f000000) == 0x0a000000 || \
+ ((ins) & 0x0fdffff0) == 0x079ff100)
+#define inst_load(ins) (0)
+#define inst_store(ins) (0)
+#define inst_unconditional_flow_transfer(ins) \
+ ((((ins) & INSN_COND_MASK) == INSN_COND_AL) && \
+ (inst_branch(ins) || inst_call(ins) || inst_return(ins)))
+
+#define getreg_val (0)
+#define next_instr_address(pc, bd) ((bd) ? (pc) : ((pc) + INSN_SIZE))
+
+#define DB_MACHINE_COMMANDS
+
+#define SOFTWARE_SSTEP
+
+db_addr_t db_branch_taken(u_int inst, db_addr_t pc, db_regs_t *regs);
+int kdb_trap __P((int, db_regs_t *));
+void db_machine_init __P((void));
+
+#define branch_taken(ins, pc, fun, regs) \
+ db_branch_taken((ins), (pc), (regs))
+
+#define DB_ELF_SYMBOLS
+#define DB_ELFSIZE 32
+#define DB_NO_AOUT
+
+void db_show_panic_cmd __P((db_expr_t, int, db_expr_t, char *));
+void db_show_frame_cmd __P((db_expr_t, int, db_expr_t, char *));
+
+#endif /* _ARM_DB_MACHDEP_H_ */