db_machdep.h revision 290273 
1/*-
2 * Mach Operating System
3 * Copyright (c) 1991,1990 Carnegie Mellon University
4 * All Rights Reserved.
5 *
6 * Permission to use, copy, modify and distribute this software and its
7 * documentation is hereby granted, provided that both the copyright
8 * notice and this permission notice appear in all copies of the
9 * software, derivative works or modified versions, and any portions
10 * thereof, and that both notices appear in supporting documentation.
11 *
12 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
13 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
14 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
15 *
16 * Carnegie Mellon requests users of this software to return to
17 *
18 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
19 *  School of Computer Science
20 *  Carnegie Mellon University
21 *  Pittsburgh PA 15213-3890
22 *
23 * any improvements or extensions that they make and grant Carnegie Mellon
24 * the rights to redistribute these changes.
25 *
26 *	from: FreeBSD: src/sys/i386/include/db_machdep.h,v 1.16 1999/10/04
27 * $FreeBSD: head/sys/arm/include/db_machdep.h 290273 2015-11-02 16:56:34Z zbb $
28 */
29
30#ifndef	_MACHINE_DB_MACHDEP_H_
31#define	_MACHINE_DB_MACHDEP_H_
32
33#include <machine/frame.h>
34#include <machine/trap.h>
35#include <machine/armreg.h>
36
37#define T_BREAKPOINT	(1)
38typedef vm_offset_t	db_addr_t;
39typedef int		db_expr_t;
40
41#define	PC_REGS()	((db_addr_t)kdb_thrctx->pcb_regs.sf_pc)
42
43#define	BKPT_INST	(KERNEL_BREAKPOINT)
44#define	BKPT_SIZE	(INSN_SIZE)
45#define	BKPT_SET(inst)	(BKPT_INST)
46
47#define	BKPT_SKIP do {							\
48	kdb_frame->tf_pc += BKPT_SIZE; \
49} while (0)
50
51#define SOFTWARE_SSTEP	1
52
53#define	IS_BREAKPOINT_TRAP(type, code)	(type == T_BREAKPOINT)
54#define	IS_WATCHPOINT_TRAP(type, code)	(0)
55
56
57#define	inst_trap_return(ins)	(0)
58/* ldmxx reg, {..., pc}
59					    01800000  stack mode
60					    000f0000  register
61					    0000ffff  register list */
62/* mov pc, reg
63					    0000000f  register */
64#define	inst_return(ins)	(((ins) & 0x0e108000) == 0x08108000 || \
65				 ((ins) & 0x0ff0fff0) == 0x01a0f000 ||	\
66				 ((ins) & 0x0ffffff0) == 0x012fff10) /* bx */
67/* bl ...
68					    00ffffff  offset>>2 */
69#define	inst_call(ins)		(((ins) & 0x0f000000) == 0x0b000000)
70/* b ...
71					    00ffffff  offset>>2 */
72/* ldr pc, [pc, reg, lsl #2]
73					    0000000f  register */
74
75#define	inst_branch(ins)	(((ins) & 0x0f000000) == 0x0a000000 || \
76				 ((ins) & 0x0fdffff0) == 0x079ff100 || \
77				 ((ins) & 0x0cd0f000) == 0x0490f000 || \
78				 ((ins) & 0x0ffffff0) == 0x012fff30 || /* blx */ \
79				 ((ins) & 0x0de0f000) == 0x0080f000)
80
81#define	inst_load(ins)		(0)
82#define	inst_store(ins)		(0)
83
84#define next_instr_address(pc, bd)	((bd) ? (pc) : ((pc) + INSN_SIZE))
85
86#define	DB_SMALL_VALUE_MAX	(0x7fffffff)
87#define	DB_SMALL_VALUE_MIN	(-0x40001)
88
89#define	DB_ELFSIZE		32
90
91int db_validate_address(vm_offset_t);
92
93u_int branch_taken (u_int insn, db_addr_t pc);
94
95#ifdef __ARMEB__
96#define BYTE_MSF	(1)
97#endif
98#endif /* !_MACHINE_DB_MACHDEP_H_ */
99