1 /*-
2 * Copyright (c) 2015-2016 Ruslan Bukin <br@bsdpad.com>
3 * All rights reserved.
4 *
5 * Portions of this software were developed by SRI International and the
6 * University of Cambridge Computer Laboratory under DARPA/AFRL contract
7 * FA8750-10-C-0237 ("CTSRD"), as part of the DARPA CRASH research programme.
8 *
9 * Portions of this software were developed by the University of Cambridge
10 * Computer Laboratory as part of the CTSRD Project, with support from the
11 * UK Higher Education Innovation Fund (HEIF).
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 * $FreeBSD: releng/11.2/sys/riscv/include/db_machdep.h 296614 2016-03-10 15:51:43Z br $
35 */
36
37 #ifndef _MACHINE_DB_MACHDEP_H_
38 #define _MACHINE_DB_MACHDEP_H_
39
40 #include <machine/riscvreg.h>
41 #include <machine/frame.h>
42 #include <machine/trap.h>
43
44 #define T_BREAKPOINT (EXCP_INSTR_BREAKPOINT)
45 #define T_WATCHPOINT (0)
46
47 typedef vm_offset_t db_addr_t;
48 typedef long db_expr_t;
49
50 #define PC_REGS() ((db_addr_t)kdb_thrctx->pcb_sepc)
51
52 #define BKPT_INST (0x00100073)
53 #define BKPT_SIZE (INSN_SIZE)
54 #define BKPT_SET(inst) (BKPT_INST)
55
56 #define BKPT_SKIP do { \
57 kdb_frame->tf_sepc += BKPT_SIZE; \
58 } while (0)
59
60 #define db_clear_single_step kdb_cpu_clear_singlestep
61 #define db_set_single_step kdb_cpu_set_singlestep
62
63 #define IS_BREAKPOINT_TRAP(type, code) (type == T_BREAKPOINT)
64 #define IS_WATCHPOINT_TRAP(type, code) (type == T_WATCHPOINT)
65
66 #define inst_trap_return(ins) (ins == 0x10000073) /* eret */
67 #define inst_return(ins) (ins == 0x00008067) /* ret */
68 #define inst_call(ins) (((ins) & 0x7f) == 111 || \
69 ((ins) & 0x7f) == 103) /* jal, jalr */
70
71 #define inst_load(ins) ({ \
72 uint32_t tmp_instr = db_get_value(PC_REGS(), sizeof(uint32_t), FALSE); \
73 is_load_instr(tmp_instr); \
74 })
75
76 #define inst_store(ins) ({ \
77 uint32_t tmp_instr = db_get_value(PC_REGS(), sizeof(uint32_t), FALSE); \
78 is_store_instr(tmp_instr); \
79 })
80
81 #define is_load_instr(ins) (((ins) & 0x7f) == 3)
82 #define is_store_instr(ins) (((ins) & 0x7f) == 35)
83
84 #define next_instr_address(pc, bd) ((bd) ? (pc) : ((pc) + 4))
85
86 #define DB_SMALL_VALUE_MAX (0x7fffffff)
87 #define DB_SMALL_VALUE_MIN (-0x40001)
88
89 #define DB_ELFSIZE 64
90
91 #endif /* !_MACHINE_DB_MACHDEP_H_ */
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