1 /* $OpenBSD: db_machdep.h,v 1.3 2021/05/12 01:20:52 jsg Exp $ */ 2 3 /* 4 * Copyright (c) 2019 Brian Bamsch <bbamsch@google.com> 5 * Copyright (c) 2015-2016 Ruslan Bukin <br@bsdpad.com> 6 * All rights reserved. 7 * 8 * Portions of this software were developed by SRI International and the 9 * University of Cambridge Computer Laboratory under DARPA/AFRL contract 10 * FA8750-10-C-0237 ("CTSRD"), as part of the DARPA CRASH research programme. 11 * 12 * Portions of this software were developed by the University of Cambridge 13 * Computer Laboratory as part of the CTSRD Project, with support from the 14 * UK Higher Education Innovation Fund (HEIF). 15 * 16 * Redistribution and use in source and binary forms, with or without 17 * modification, are permitted provided that the following conditions 18 * are met: 19 * 1. Redistributions of source code must retain the above copyright 20 * notice, this list of conditions and the following disclaimer. 21 * 2. Redistributions in binary form must reproduce the above copyright 22 * notice, this list of conditions and the following disclaimer in the 23 * documentation and/or other materials provided with the distribution. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * $FreeBSD$ 38 */ 39 40 #ifndef _MACHINE_DB_MACHDEP_H_ 41 #define _MACHINE_DB_MACHDEP_H_ 42 43 #include <sys/param.h> 44 #include <uvm/uvm_extern.h> 45 #include <machine/riscvreg.h> 46 #include <machine/frame.h> 47 #include <machine/trap.h> 48 49 #define T_BREAKPOINT (EXCP_BREAKPOINT) 50 #define T_WATCHPOINT (0) 51 52 typedef vaddr_t db_addr_t; 53 typedef long db_expr_t; 54 55 typedef trapframe_t db_regs_t; 56 57 extern db_regs_t ddb_regs; 58 #define DDB_REGS (&ddb_regs) 59 60 #define PC_REGS(regs) ((db_addr_t)(regs)->tf_ra) 61 #define SET_PC_REGS(regs, value) (regs)->tf_ra = (register_t)(value) 62 63 #define BKPT_INST (KERNEL_BREAKPOINT) 64 #define BKPT_SIZE (INSN_SIZE) 65 #define BKPT_SET(inst) (BKPT_INST) 66 67 #define IS_BREAKPOINT_TRAP(type, code) ((type) == T_BREAKPOINT) 68 #define IS_WATCHPOINT_TRAP(type, code) ((type) == T_WATCHPOINT) 69 70 #define inst_trap_return(ins) (ins == 0x10000073) /* eret */ 71 #define inst_return(ins) (ins == 0x00008067) /* ret */ 72 #define inst_call(ins) (((ins) & 0x7f) == 0x6f || \ 73 ((ins) & 0x7f) == 0x67) /* jal, jalr */ 74 #define inst_branch(ins) (((ins) & 0x7f) == 0x63) /* branch */ 75 76 #define next_instr_address(pc, bd) ((bd) ? (pc) : ((pc) + INSN_SIZE)) 77 78 #define DB_MACHINE_COMMANDS 79 80 #define SOFTWARE_SSTEP 81 82 int db_trapper(vaddr_t, u_int, trapframe_t *, int); 83 void db_machine_init (void); 84 db_addr_t db_branch_taken(u_int inst, db_addr_t pc, db_regs_t *regs); 85 86 #define branch_taken(ins, pc, fun, regs) \ 87 db_branch_taken((ins), (pc), (regs)) 88 89 /* For ddb_state */ 90 #define DDB_STATE_NOT_RUNNING 0 91 #define DDB_STATE_RUNNING 1 92 #define DDB_STATE_EXITING 2 93 94 #endif /* !_MACHINE_DB_MACHDEP_H_ */ 95