1 /* $NetBSD: db_machdep.h,v 1.28 2020/12/01 02:48:29 rin Exp $ */ 2 3 /* 4 * Copyright (c) 1996 Scott K Stevens 5 * 6 * Mach Operating System 7 * Copyright (c) 1991,1990 Carnegie Mellon University 8 * All Rights Reserved. 9 * 10 * Permission to use, copy, modify and distribute this software and its 11 * documentation is hereby granted, provided that both the copyright 12 * notice and this permission notice appear in all copies of the 13 * software, derivative works or modified versions, and any portions 14 * thereof, and that both notices appear in supporting documentation. 15 * 16 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 17 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR 18 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 19 * 20 * Carnegie Mellon requests users of this software to return to 21 * 22 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 23 * School of Computer Science 24 * Carnegie Mellon University 25 * Pittsburgh PA 15213-3890 26 * 27 * any improvements or extensions that they make and grant Carnegie Mellon 28 * the rights to redistribute these changes. 29 */ 30 31 #ifndef _ARM_DB_MACHDEP_H_ 32 #define _ARM_DB_MACHDEP_H_ 33 34 #if defined(__arm__) 35 36 /* 37 * Machine-dependent defines for new kernel debugger. 38 */ 39 #include <sys/types.h> 40 #include <uvm/uvm_extern.h> 41 #include <arm/armreg.h> 42 #include <arm/cdefs.h> 43 #include <machine/frame.h> 44 #include <machine/trap.h> 45 46 /* end of mangling */ 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 trapframe_t db_regs_t; 53 54 #ifndef MULTIPROCESSOR 55 extern db_regs_t ddb_regs; /* register state */ 56 #define DDB_REGS (&ddb_regs) 57 #else 58 extern db_regs_t *ddb_regp; 59 #define DDB_REGS (ddb_regp) 60 #define ddb_regs (*ddb_regp) 61 #endif 62 63 #define PC_REGS(regs) ((regs)->tf_pc) 64 #define PC_ADVANCE(r) ((r)->tf_r15 += BKPT_SIZE) 65 66 #define BKPT_ADDR(addr) (addr) /* breakpoint address */ 67 #if defined(DDB) 68 #define BKPT_INST (KERNEL_BREAKPOINT) /* breakpoint instruction */ 69 #else 70 /* breakpoint instruction if we use KGDB, this is used in db_set_temp_breakpoint() */ 71 #define BKPT_INST (GDB5_BREAKPOINT) 72 #endif 73 #define BKPT_SIZE (INSN_SIZE) /* size of breakpoint inst */ 74 #ifdef __ARM_ARCH_BE8 75 #define BKPT_SET(inst, addr) (bswap32(BKPT_INST)) 76 #else 77 #define BKPT_SET(inst, addr) (BKPT_INST) 78 #endif 79 80 /*#define FIXUP_PC_AFTER_BREAK(regs) ((regs)->tf_pc -= BKPT_SIZE)*/ 81 82 #define T_FAULT (0) 83 #define T_BREAKPOINT (1) 84 85 #define IS_BREAKPOINT_TRAP(type, code) ((type) == T_BREAKPOINT) 86 #define IS_WATCHPOINT_TRAP(type, code) (0) 87 88 #define inst_trap_return(ins) (0) 89 /* ldmxx reg, {..., pc} 90 01800000 stack mode 91 000f0000 register 92 0000ffff register list */ 93 /* mov pc, reg 94 0000000f register */ 95 #define inst_return(ins) (((ins) & 0x0e108000) == 0x08108000 || \ 96 ((ins) & 0x0ff0fff0) == 0x01a0f000) 97 /* bl ... 98 00ffffff offset>>2 */ 99 #define inst_call(ins) (((ins) & 0x0f000000) == 0x0b000000) 100 /* b ... 101 00ffffff offset>>2 */ 102 /* ldr pc, [pc, reg, lsl #2] 103 0000000f register */ 104 #define inst_branch(ins) (((ins) & 0x0f000000) == 0x0a000000 || \ 105 ((ins) & 0x0fdffff0) == 0x079ff100 || \ 106 ((ins) & 0x0ff0f000) == 0x0590f000) 107 #define inst_load(ins) (0) 108 #define inst_store(ins) (0) 109 #define inst_unconditional_flow_transfer(ins) \ 110 (__SHIFTOUT((ins), INSN_COND_MASK) == INSN_COND_AL \ 111 && (inst_branch(ins) || inst_call(ins) || inst_return(ins))) 112 113 #define getreg_val (0) 114 #define next_instr_address(pc, bd) ((bd) ? (pc) : ((pc) + INSN_SIZE)) 115 116 #define DB_MACHINE_COMMANDS 117 118 #define SOFTWARE_SSTEP 119 120 u_int branch_taken(u_int insn, u_int pc, db_regs_t *db_regs); 121 int kdb_trap(int, db_regs_t *); 122 void db_machine_init(void); 123 int db_validate_address(vaddr_t addr); 124 125 #define DB_ELF_SYMBOLS 126 127 /* 128 * kgdb 129 */ 130 typedef register_t kgdb_reg_t; 131 #define KGDB_NUMREGS (16 + 8*3 + 2) /* r0..r15, f0..f7, fps, cpsr 132 * fp-registers are 12 bytes wide */ 133 #define KGDB_REGNUM_R0 0 134 #define KGDB_REGNUM_SPSR 16 + 8*3 + 1 135 #define KGDB_BUFLEN 1024 136 137 /* 138 * MP stuff 139 */ 140 extern volatile struct cpu_info *db_onproc; 141 extern volatile struct cpu_info *db_newcpu; 142 143 #elif defined(__aarch64__) 144 145 #include <aarch64/db_machdep.h> 146 147 #endif 148 149 #endif /* _ARM_DB_MACHDEP_H_ */ 150