1 /* $NetBSD: db_machdep.h,v 1.28 2011/07/09 16:58:05 matt 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/pcb.h> 42 43 #define DB_ELF_SYMBOLS 44 #ifndef DB_ELFSIZE 45 #define DB_ELFSIZE 32 46 #endif 47 48 typedef vaddr_t db_addr_t; /* address - unsigned */ 49 #define DDB_EXPR_FMT "l" /* expression is long */ 50 typedef long db_expr_t; /* expression - signed */ 51 52 typedef struct reg db_regs_t; 53 54 extern db_regs_t ddb_regs; /* register state */ 55 #define DDB_REGS (&ddb_regs) 56 57 #define PC_REGS(regs) ((regs)->r_regs[_R_PC]) 58 59 #define PC_ADVANCE(regs) do { \ 60 if ((db_get_value((regs)->r_regs[_R_PC], sizeof(int), false) &\ 61 0xfc00003f) == 0xd) \ 62 (regs)->r_regs[_R_PC] += BKPT_SIZE; \ 63 } while(0) 64 65 /* Similar to PC_ADVANCE(), except only advance on cpu_Debugger()'s bpt */ 66 #define PC_BREAK_ADVANCE(regs) do { \ 67 if (db_get_value((regs)->r_regs[_R_PC], sizeof(int), false) == 0xd) \ 68 (regs)->r_regs[_R_PC] += BKPT_SIZE; \ 69 } while(0) 70 71 #define BKPT_ADDR(addr) (addr) /* breakpoint address */ 72 #define BKPT_INST 0x0001000D 73 #define BKPT_SIZE (4) /* size of breakpoint inst */ 74 #define BKPT_SET(inst, addr) (BKPT_INST) 75 76 #define IS_BREAKPOINT_TRAP(type, code) ((type) == T_BREAK) 77 #define IS_WATCHPOINT_TRAP(type, code) (0) /* XXX mips3 watchpoint */ 78 79 /* 80 * Interface to disassembly (shared with mdb) 81 */ 82 db_addr_t db_disasm_insn(int insn, db_addr_t loc, bool altfmt); 83 84 85 /* 86 * Entrypoints to DDB for kernel, keyboard drivers, init hook 87 */ 88 void kdb_kbd_trap(db_regs_t *); 89 int kdb_trap(int type, struct reg *); 90 91 static inline void 92 db_set_ddb_regs(int type, struct reg *regs) 93 { 94 ddb_regs = *regs; 95 } 96 97 98 /* 99 * Constants for KGDB. 100 */ 101 typedef mips_reg_t kgdb_reg_t; 102 #define KGDB_NUMREGS 90 103 #define KGDB_BUFLEN 1024 104 105 /* 106 * MIPS cpus have no hardware single-step. 107 */ 108 #define SOFTWARE_SSTEP 109 110 #define inst_trap_return(ins) ((ins)&0) 111 112 bool inst_branch(int inst); 113 bool inst_call(int inst); 114 bool inst_return(int inst); 115 bool inst_load(int inst); 116 bool inst_store(int inst); 117 bool inst_unconditional_flow_transfer(int inst); 118 db_addr_t branch_taken(int inst, db_addr_t pc, db_regs_t *regs); 119 db_addr_t next_instr_address(db_addr_t pc, bool bd); 120 121 bool ddb_running_on_this_cpu_p(void); 122 bool ddb_running_on_any_cpu_p(void); 123 void db_resume_others(void); 124 125 /* 126 * We have machine-dependent commands. 127 */ 128 #define DB_MACHINE_COMMANDS 129 130 #endif /* _MIPS_DB_MACHDEP_H_ */ 131