1 /* $OpenBSD: db_machdep.h,v 1.2 1998/09/15 10:50:12 pefo Exp $ */ 2 3 /*- 4 * SPDX-License-Identifier: BSD-4-Clause 5 * 6 * Copyright (c) 1998 Per Fogelstrom, Opsycon AB 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed under OpenBSD by 19 * Per Fogelstrom, Opsycon AB, Sweden. 20 * 4. The name of the author may not be used to endorse or promote products 21 * derived from this software without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 24 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 25 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 27 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * JNPR: db_machdep.h,v 1.7 2006/10/16 12:30:34 katta 36 * $FreeBSD$ 37 */ 38 39 #ifndef _MIPS_DB_MACHDEP_H_ 40 #define _MIPS_DB_MACHDEP_H_ 41 42 #include <machine/frame.h> 43 #include <machine/trap.h> 44 45 typedef struct trapframe db_regs_t; 46 extern db_regs_t ddb_regs; /* register state */ 47 48 typedef vm_offset_t db_addr_t; /* address - unsigned */ 49 typedef register_t db_expr_t; /* expression - signed */ 50 51 #define SOFTWARE_SSTEP /* Need software single step */ 52 #define SOFTWARE_SSTEP_EMUL /* next_instr_address() emulates 100% */ 53 db_addr_t next_instr_address(db_addr_t, boolean_t); 54 #define BKPT_SIZE (4) 55 #define BKPT_SET(ins) (MIPS_BREAK_DDB) 56 #define DB_VALID_BREAKPOINT(addr) (((addr) & 3) == 0) 57 58 #define IS_BREAKPOINT_TRAP(type, code) ((type) == T_BREAK) 59 #define IS_WATCHPOINT_TRAP(type, code) (0) /* XXX mips3 watchpoint */ 60 61 #define PC_REGS() ((db_addr_t)kdb_thrctx->pcb_regs.pc) 62 #define BKPT_SKIP \ 63 do { \ 64 if((db_get_value(kdb_frame->pc, sizeof(int), FALSE) & \ 65 ~MIPS_BREAK_VAL_MASK) == MIPS_BREAK_INSTR) { \ 66 kdb_frame->pc += BKPT_SIZE; \ 67 kdb_thrctx->pcb_regs.pc += BKPT_SIZE; \ 68 } \ 69 } while (0); 70 71 /* 72 * Test of instructions to see class. 73 */ 74 #define IT_CALL 0x01 75 #define IT_BRANCH 0x02 76 #define IT_LOAD 0x03 77 #define IT_STORE 0x04 78 79 #define inst_branch(i) (db_inst_type(i) == IT_BRANCH) 80 #define inst_trap_return(i) ((i) & 0) 81 #define inst_call(i) (db_inst_type(i) == IT_CALL) 82 #define inst_return(i) ((i) == 0x03e00008) 83 #define inst_load(i) (db_inst_type(i) == IT_LOAD) 84 #define inst_store(i) (db_inst_type(i) == IT_STORE) 85 86 int db_inst_type(int); 87 db_addr_t branch_taken(int inst, db_addr_t pc); 88 int32_t kdbpeek(int *); 89 int64_t kdbpeekd(int *); 90 91 #endif /* !_MIPS_DB_MACHDEP_H_ */ 92