1 /* $OpenBSD: db_machdep.h,v 1.2 1998/09/15 10:50:12 pefo Exp $ */
2
3 /*
4 * Copyright (c) 1998 Per Fogelstrom, Opsycon AB
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. All advertising materials mentioning features or use of this software
15 * must display the following acknowledgement:
16 * This product includes software developed under OpenBSD by
17 * Per Fogelstrom, Opsycon AB, Sweden.
18 * 4. The name of the author may not be used to endorse or promote products
19 * derived from this software without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
22 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
23 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
25 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * JNPR: db_machdep.h,v 1.7 2006/10/16 12:30:34 katta
34 * $FreeBSD: releng/9.0/sys/mips/include/db_machdep.h 210041 2010-07-14 00:52:29Z imp $
35 */
36
37 #ifndef _MIPS_DB_MACHDEP_H_
38 #define _MIPS_DB_MACHDEP_H_
39
40 #include <machine/frame.h>
41 #include <machine/trap.h>
42 #include <machine/endian.h>
43
44 typedef struct trapframe db_regs_t;
45 extern db_regs_t ddb_regs; /* register state */
46
47 typedef vm_offset_t db_addr_t; /* address - unsigned */
48 typedef register_t db_expr_t; /* expression - signed */
49
50 #if BYTE_ORDER == _BIG_ENDIAN
51 #define BYTE_MSF (1)
52 #endif
53
54 #define SOFTWARE_SSTEP /* Need software single step */
55 #define SOFTWARE_SSTEP_EMUL /* next_instr_address() emulates 100% */
56 db_addr_t next_instr_address(db_addr_t, boolean_t);
57 #define BKPT_SIZE (4)
58 #define BKPT_SET(ins) (MIPS_BREAK_DDB)
59 #define DB_VALID_BREAKPOINT(addr) (((addr) & 3) == 0)
60
61 #define IS_BREAKPOINT_TRAP(type, code) ((type) == T_BREAK)
62 #define IS_WATCHPOINT_TRAP(type, code) (0) /* XXX mips3 watchpoint */
63
64 #define PC_REGS() ((db_addr_t)kdb_thrctx->pcb_regs.pc)
65 #define BKPT_SKIP \
66 do { \
67 if((db_get_value(kdb_frame->pc, sizeof(int), FALSE) & \
68 ~MIPS_BREAK_VAL_MASK) == MIPS_BREAK_INSTR) { \
69 kdb_frame->pc += BKPT_SIZE; \
70 kdb_thrctx->pcb_regs.pc += BKPT_SIZE; \
71 } \
72 } while (0);
73
74
75 /*
76 * Test of instructions to see class.
77 */
78 #define IT_CALL 0x01
79 #define IT_BRANCH 0x02
80 #define IT_LOAD 0x03
81 #define IT_STORE 0x04
82
83 #define inst_branch(i) (db_inst_type(i) == IT_BRANCH)
84 #define inst_trap_return(i) ((i) & 0)
85 #define inst_call(i) (db_inst_type(i) == IT_CALL)
86 #define inst_return(i) ((i) == 0x03e00008)
87 #define inst_load(i) (db_inst_type(i) == IT_LOAD)
88 #define inst_store(i) (db_inst_type(i) == IT_STORE)
89
90 #define DB_SMALL_VALUE_MAX 0x7fffffff
91 #define DB_SMALL_VALUE_MIN (-0x400001)
92
93 int db_inst_type(int);
94 db_addr_t branch_taken(int inst, db_addr_t pc);
95 void stacktrace_subr(register_t pc, register_t sp, register_t ra, int (*)(const char *, ...));
96 int kdbpeek(int *);
97
98 #endif /* !_MIPS_DB_MACHDEP_H_ */
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