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 * $FreeBSD$ 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 (SCAUSE_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_frame->tf_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 uint32_t _instr; \ 58 \ 59 _instr = db_get_value(PC_REGS(), sizeof(uint32_t), FALSE); \ 60 if ((_instr & 0x3) == 0x3) \ 61 kdb_frame->tf_sepc += 4; /* ebreak */ \ 62 else \ 63 kdb_frame->tf_sepc += 2; /* c.ebreak */ \ 64 } while (0) 65 66 #define db_clear_single_step kdb_cpu_clear_singlestep 67 #define db_set_single_step kdb_cpu_set_singlestep 68 69 #define IS_BREAKPOINT_TRAP(type, code) (type == T_BREAKPOINT) 70 #define IS_WATCHPOINT_TRAP(type, code) (type == T_WATCHPOINT) 71 72 #define inst_trap_return(ins) (ins == 0x10000073) /* eret */ 73 #define inst_return(ins) (ins == 0x00008067) /* ret */ 74 #define inst_call(ins) (((ins) & 0x7f) == 111 || \ 75 ((ins) & 0x7f) == 103) /* jal, jalr */ 76 77 #define inst_load(ins) ({ \ 78 uint32_t tmp_instr = db_get_value(PC_REGS(), sizeof(uint32_t), FALSE); \ 79 is_load_instr(tmp_instr); \ 80 }) 81 82 #define inst_store(ins) ({ \ 83 uint32_t tmp_instr = db_get_value(PC_REGS(), sizeof(uint32_t), FALSE); \ 84 is_store_instr(tmp_instr); \ 85 }) 86 87 #define is_load_instr(ins) (((ins) & 0x7f) == 3) 88 #define is_store_instr(ins) (((ins) & 0x7f) == 35) 89 90 #define next_instr_address(pc, bd) ((bd) ? (pc) : ((pc) + 4)) 91 92 #define DB_ELFSIZE 64 93 94 #endif /* !_MACHINE_DB_MACHDEP_H_ */ 95