1 /* $NetBSD: db_machdep.h,v 1.30 2017/11/06 03:47:47 christos 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 45 typedef vaddr_t db_addr_t; /* address - unsigned */ 46 #ifdef __mips_n32 47 #define DDB_EXPR_FMT "ll" /* expression is long long */ 48 typedef int64_t db_expr_t; /* expression - signed */ 49 #else 50 #define DDB_EXPR_FMT "l" /* expression is long */ 51 typedef long db_expr_t; /* expression - signed */ 52 #endif 53 54 typedef struct reg db_regs_t; 55 56 extern db_regs_t ddb_regs; /* register state */ 57 #define DDB_REGS (&ddb_regs) 58 59 #define PC_REGS(regs) ((regs)->r_regs[_R_PC]) 60 61 #define PC_ADVANCE(regs) do { \ 62 if ((db_get_value((regs)->r_regs[_R_PC], sizeof(int), false) &\ 63 0xfc00003f) == 0xd) \ 64 (regs)->r_regs[_R_PC] += BKPT_SIZE; \ 65 } while(0) 66 67 /* Similar to PC_ADVANCE(), except only advance on cpu_Debugger()'s bpt */ 68 #define PC_BREAK_ADVANCE(regs) do { \ 69 if (db_get_value((regs)->r_regs[_R_PC], sizeof(int), false) == 0xd) \ 70 (regs)->r_regs[_R_PC] += BKPT_SIZE; \ 71 } while(0) 72 73 #define BKPT_ADDR(addr) (addr) /* breakpoint address */ 74 #define BKPT_INST 0x0001000D 75 #define BKPT_SIZE (4) /* size of breakpoint inst */ 76 #define BKPT_SET(inst, addr) (BKPT_INST) 77 78 #define IS_BREAKPOINT_TRAP(type, code) ((type) == T_BREAK) 79 #define IS_WATCHPOINT_TRAP(type, code) (0) /* XXX mips3 watchpoint */ 80 81 /* 82 * Interface to disassembly (shared with mdb) 83 */ 84 db_addr_t db_disasm_insn(int insn, db_addr_t loc, bool altfmt); 85 86 87 /* 88 * Entrypoints to DDB for kernel, keyboard drivers, init hook 89 */ 90 void kdb_kbd_trap(db_regs_t *); 91 int kdb_trap(int type, struct reg *); 92 93 static inline void 94 db_set_ddb_regs(int type, struct reg *regs) 95 { 96 ddb_regs = *regs; 97 } 98 99 100 /* 101 * Constants for KGDB. 102 */ 103 typedef mips_reg_t kgdb_reg_t; 104 #define KGDB_NUMREGS 90 105 #define KGDB_BUFLEN 1024 106 107 /* 108 * MIPS cpus have no hardware single-step. 109 */ 110 #define SOFTWARE_SSTEP 111 112 #define inst_trap_return(ins) ((ins)&0) 113 114 bool inst_branch(int inst); 115 bool inst_call(int inst); 116 bool inst_return(int inst); 117 bool inst_load(int inst); 118 bool inst_store(int inst); 119 bool inst_unconditional_flow_transfer(int inst); 120 db_addr_t branch_taken(int inst, db_addr_t pc, db_regs_t *regs); 121 db_addr_t next_instr_address(db_addr_t pc, bool bd); 122 123 bool ddb_running_on_this_cpu_p(void); 124 bool ddb_running_on_any_cpu_p(void); 125 void db_resume_others(void); 126 127 /* 128 * We have machine-dependent commands. 129 */ 130 #define DB_MACHINE_COMMANDS 131 132 #endif /* _MIPS_DB_MACHDEP_H_ */ 133