1 /* $NetBSD: db_machdep.h,v 1.27 2011/05/26 15:34:13 joerg 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 44 typedef vaddr_t db_addr_t; /* address - unsigned */ 45 #define DDB_EXPR_FMT "l" /* expression is long */ 46 typedef long db_expr_t; /* expression - signed */ 47 48 typedef struct reg db_regs_t; 49 50 extern db_regs_t ddb_regs; /* register state */ 51 #define DDB_REGS (&ddb_regs) 52 53 #define PC_REGS(regs) ((regs)->r_regs[_R_PC]) 54 55 #define PC_ADVANCE(regs) do { \ 56 if ((db_get_value((regs)->r_regs[_R_PC], sizeof(int), false) &\ 57 0xfc00003f) == 0xd) \ 58 (regs)->r_regs[_R_PC] += BKPT_SIZE; \ 59 } while(0) 60 61 /* Similar to PC_ADVANCE(), except only advance on cpu_Debugger()'s bpt */ 62 #define PC_BREAK_ADVANCE(regs) do { \ 63 if (db_get_value((regs)->r_regs[_R_PC], sizeof(int), false) == 0xd) \ 64 (regs)->r_regs[_R_PC] += BKPT_SIZE; \ 65 } while(0) 66 67 #define BKPT_ADDR(addr) (addr) /* breakpoint address */ 68 #define BKPT_INST 0x0001000D 69 #define BKPT_SIZE (4) /* size of breakpoint inst */ 70 #define BKPT_SET(inst, addr) (BKPT_INST) 71 72 #define IS_BREAKPOINT_TRAP(type, code) ((type) == T_BREAK) 73 #define IS_WATCHPOINT_TRAP(type, code) (0) /* XXX mips3 watchpoint */ 74 75 /* 76 * Interface to disassembly (shared with mdb) 77 */ 78 db_addr_t db_disasm_insn(int insn, db_addr_t loc, bool altfmt); 79 80 81 /* 82 * Entrypoints to DDB for kernel, keyboard drivers, init hook 83 */ 84 void kdb_kbd_trap(db_regs_t *); 85 int kdb_trap(int type, struct reg *); 86 87 static inline void 88 db_set_ddb_regs(int type, struct reg *regs) 89 { 90 ddb_regs = *regs; 91 } 92 93 94 /* 95 * Constants for KGDB. 96 */ 97 typedef mips_reg_t kgdb_reg_t; 98 #define KGDB_NUMREGS 90 99 #define KGDB_BUFLEN 1024 100 101 /* 102 * MIPS cpus have no hardware single-step. 103 */ 104 #define SOFTWARE_SSTEP 105 106 #define inst_trap_return(ins) ((ins)&0) 107 108 bool inst_branch(int inst); 109 bool inst_call(int inst); 110 bool inst_return(int inst); 111 bool inst_load(int inst); 112 bool inst_store(int inst); 113 bool inst_unconditional_flow_transfer(int inst); 114 db_addr_t branch_taken(int inst, db_addr_t pc, db_regs_t *regs); 115 db_addr_t next_instr_address(db_addr_t pc, bool bd); 116 117 bool ddb_running_on_this_cpu_p(void); 118 bool ddb_running_on_any_cpu_p(void); 119 void db_resume_others(void); 120 121 /* 122 * We have machine-dependent commands. 123 */ 124 #define DB_MACHINE_COMMANDS 125 126 #endif /* _MIPS_DB_MACHDEP_H_ */ 127