1 /* $NetBSD: db_machdep.h,v 1.14 2002/03/05 14:12:29 simonb Exp $ */ 2 3 /* 4 * Copyright (c) 1997 Jonathan Stone (hereinafter referred to as the author) 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Jonathan Stone for 18 * the NetBSD Project. 19 * 4. The name of the author may not be used to endorse or promote products 20 * derived from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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 #ifndef _MIPS_DB_MACHDEP_H_ 35 #define _MIPS_DB_MACHDEP_H_ 36 37 #include <uvm/uvm_param.h> /* XXX boolean_t */ 38 #include <mips/trap.h> /* T_BREAK */ 39 #include <mips/reg.h> /* register state */ 40 #include <mips/regnum.h> /* symbolic register indices */ 41 #include <mips/proc.h> /* register state */ 42 43 44 typedef vaddr_t db_addr_t; /* address - unsigned */ 45 typedef long db_expr_t; /* expression - signed */ 46 47 typedef struct frame db_regs_t; 48 49 extern db_regs_t ddb_regs; /* register state */ 50 #define DDB_REGS (&ddb_regs) 51 52 #define PC_REGS(regs) ((db_addr_t)(regs)->f_regs[PC]) 53 54 #define PC_ADVANCE(regs) do { \ 55 if ((db_get_value((regs)->f_regs[PC], sizeof(int), FALSE) & \ 56 0xfc00003f) == 0xd) \ 57 (regs)->f_regs[PC] += BKPT_SIZE; \ 58 } while(0) 59 60 /* Similar to PC_ADVANCE(), except only advance on cpu_Debugger()'s bpt */ 61 #define PC_BREAK_ADVANCE(regs) do { \ 62 if (db_get_value((regs)->f_regs[PC], sizeof(int), FALSE) == 0xd) \ 63 (regs)->f_regs[PC] += BKPT_SIZE; \ 64 } while(0) 65 66 #define BKPT_INST 0x0001000D 67 #define BKPT_SIZE (4) /* size of breakpoint inst */ 68 #define BKPT_SET(inst) (BKPT_INST) 69 70 #define IS_BREAKPOINT_TRAP(type, code) ((type) == T_BREAK) 71 #define IS_WATCHPOINT_TRAP(type, code) (0) /* XXX mips3 watchpoint */ 72 73 /* 74 * Interface to disassembly (shared with mdb) 75 */ 76 db_addr_t db_disasm_insn(int insn, db_addr_t loc, boolean_t altfmt); 77 78 79 /* 80 * Entrypoints to DDB for kernel, keyboard drivers, init hook 81 */ 82 void kdb_kbd_trap(db_regs_t *); 83 void db_set_ddb_regs(int type, mips_reg_t *); 84 int kdb_trap(int type, mips_reg_t *); 85 86 87 /* 88 * Constants for KGDB. 89 */ 90 typedef mips_reg_t kgdb_reg_t; 91 #define KGDB_NUMREGS 90 92 #define KGDB_BUFLEN 1024 93 94 /* 95 * MIPS cpus have no hardware single-step. 96 */ 97 #define SOFTWARE_SSTEP 98 99 #define inst_trap_return(ins) ((ins)&0) 100 101 boolean_t inst_branch(int inst); 102 boolean_t inst_call(int inst); 103 boolean_t inst_return(int inst); 104 boolean_t inst_load(int inst); 105 boolean_t inst_store(int inst); 106 boolean_t inst_unconditional_flow_transfer(int inst); 107 db_addr_t branch_taken(int inst, db_addr_t pc, db_regs_t *regs); 108 db_addr_t next_instr_address(db_addr_t pc, boolean_t bd); 109 110 /* 111 * We have machine-dependent commands. 112 */ 113 #define DB_MACHINE_COMMANDS 114 115 #endif /* _MIPS_DB_MACHDEP_H_ */ 116