1 /* $NetBSD: db_machdep.h,v 1.29 2015/06/06 22:19:07 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 #ifdef __mips_n32 50 #define DDB_EXPR_FMT "ll" /* expression is long long */ 51 typedef int64_t db_expr_t; /* expression - signed */ 52 #else 53 #define DDB_EXPR_FMT "l" /* expression is long */ 54 typedef long db_expr_t; /* expression - signed */ 55 #endif 56 57 typedef struct reg db_regs_t; 58 59 extern db_regs_t ddb_regs; /* register state */ 60 #define DDB_REGS (&ddb_regs) 61 62 #define PC_REGS(regs) ((regs)->r_regs[_R_PC]) 63 64 #define PC_ADVANCE(regs) do { \ 65 if ((db_get_value((regs)->r_regs[_R_PC], sizeof(int), false) &\ 66 0xfc00003f) == 0xd) \ 67 (regs)->r_regs[_R_PC] += BKPT_SIZE; \ 68 } while(0) 69 70 /* Similar to PC_ADVANCE(), except only advance on cpu_Debugger()'s bpt */ 71 #define PC_BREAK_ADVANCE(regs) do { \ 72 if (db_get_value((regs)->r_regs[_R_PC], sizeof(int), false) == 0xd) \ 73 (regs)->r_regs[_R_PC] += BKPT_SIZE; \ 74 } while(0) 75 76 #define BKPT_ADDR(addr) (addr) /* breakpoint address */ 77 #define BKPT_INST 0x0001000D 78 #define BKPT_SIZE (4) /* size of breakpoint inst */ 79 #define BKPT_SET(inst, addr) (BKPT_INST) 80 81 #define IS_BREAKPOINT_TRAP(type, code) ((type) == T_BREAK) 82 #define IS_WATCHPOINT_TRAP(type, code) (0) /* XXX mips3 watchpoint */ 83 84 /* 85 * Interface to disassembly (shared with mdb) 86 */ 87 db_addr_t db_disasm_insn(int insn, db_addr_t loc, bool altfmt); 88 89 90 /* 91 * Entrypoints to DDB for kernel, keyboard drivers, init hook 92 */ 93 void kdb_kbd_trap(db_regs_t *); 94 int kdb_trap(int type, struct reg *); 95 96 static inline void 97 db_set_ddb_regs(int type, struct reg *regs) 98 { 99 ddb_regs = *regs; 100 } 101 102 103 /* 104 * Constants for KGDB. 105 */ 106 typedef mips_reg_t kgdb_reg_t; 107 #define KGDB_NUMREGS 90 108 #define KGDB_BUFLEN 1024 109 110 /* 111 * MIPS cpus have no hardware single-step. 112 */ 113 #define SOFTWARE_SSTEP 114 115 #define inst_trap_return(ins) ((ins)&0) 116 117 bool inst_branch(int inst); 118 bool inst_call(int inst); 119 bool inst_return(int inst); 120 bool inst_load(int inst); 121 bool inst_store(int inst); 122 bool inst_unconditional_flow_transfer(int inst); 123 db_addr_t branch_taken(int inst, db_addr_t pc, db_regs_t *regs); 124 db_addr_t next_instr_address(db_addr_t pc, bool bd); 125 126 bool ddb_running_on_this_cpu_p(void); 127 bool ddb_running_on_any_cpu_p(void); 128 void db_resume_others(void); 129 130 /* 131 * We have machine-dependent commands. 132 */ 133 #define DB_MACHINE_COMMANDS 134 135 #endif /* _MIPS_DB_MACHDEP_H_ */ 136