1 /* $OpenBSD: db_machdep.h,v 1.2 1997/03/21 00:48:48 niklas Exp $ */ 2 /* $NetBSD: db_machdep.h,v 1.25 2015/01/23 07:27:05 nonaka Exp $ */ 3 4 /* 5 * Mach Operating System 6 * Copyright (c) 1992 Carnegie Mellon University 7 * All Rights Reserved. 8 * 9 * Permission to use, copy, modify and distribute this software and its 10 * documentation is hereby granted, provided that both the copyright 11 * notice and this permission notice appear in all copies of the 12 * software, derivative works or modified versions, and any portions 13 * thereof, and that both notices appear in supporting documentation. 14 * 15 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 16 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR 17 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 18 * 19 * Carnegie Mellon requests users of this software to return to 20 * 21 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 22 * School of Computer Science 23 * Carnegie Mellon University 24 * Pittsburgh PA 15213-3890 25 * 26 * any improvements or extensions that they make and grant Carnegie Mellon 27 * the rights to redistribute these changes. 28 */ 29 30 /* 31 * Machine-dependent defines for new kernel debugger. 32 */ 33 #ifndef _PPC_DB_MACHDEP_H_ 34 #define _PPC_DB_MACHDEP_H_ 35 36 #include <uvm/uvm_prot.h> 37 #include <uvm/uvm_param.h> 38 #include <machine/trap.h> 39 40 #ifdef _KERNEL 41 #include "opt_ppcarch.h" 42 #endif 43 44 #define DB_ELF_SYMBOLS 45 #define DB_ELFSIZE 32 46 47 typedef vaddr_t db_addr_t; /* address - unsigned */ 48 #define DDB_EXPR_FMT "l" /* expression is long */ 49 typedef long db_expr_t; /* expression - signed */ 50 struct powerpc_saved_state { 51 u_int32_t r[32]; /* data registers */ 52 u_int32_t iar; 53 u_int32_t msr; 54 u_int32_t lr; 55 u_int32_t ctr; 56 u_int32_t cr; 57 u_int32_t xer; 58 u_int32_t mq; 59 u_int32_t dear; 60 u_int32_t esr; 61 u_int32_t pid; 62 }; 63 typedef struct powerpc_saved_state db_regs_t; 64 extern db_regs_t ddb_regs; /* register state */ 65 #define DDB_REGS (&ddb_regs) 66 67 #define PC_REGS(regs) (*(db_addr_t *)&(regs)->iar) 68 69 #define BKPT_ADDR(addr) (addr) /* breakpoint address */ 70 #define BKPT_ASM "trap" /* should match BKPT_INST */ 71 #define BKPT_INST 0x7fe00008 /* breakpoint instruction */ 72 #define BKPT_SIZE (4) /* size of breakpoint inst */ 73 #define BKPT_SET(inst, addr) (BKPT_INST) 74 75 #ifndef PPC_IBM4XX 76 #define SR_SINGLESTEP 0x400 77 #define db_clear_single_step(regs) ((regs)->msr &= ~SR_SINGLESTEP) 78 #define db_set_single_step(regs) ((regs)->msr |= SR_SINGLESTEP) 79 #else 80 #define SOFTWARE_SSTEP 81 #endif 82 83 #define T_BREAKPOINT 0xffff 84 #define IS_BREAKPOINT_TRAP(type, code) ((type) == T_BREAKPOINT) 85 86 #define T_WATCHPOINT 0xeeee 87 #ifdef T_WATCHPOINT 88 #define IS_WATCHPOINT_TRAP(type, code) ((type) == T_WATCHPOINT) 89 #else 90 #define IS_WATCHPOINT_TRAP(type, code) 0 91 #endif 92 93 #define M_RTS 0xfc0007ff 94 #define I_RTS 0x4c000020 95 #define I_BLRL 0x4c000021 96 #define M_BC 0xfc000001 97 #define I_BC 0x40000000 98 #define I_BCL 0x40000001 99 #define M_B 0xfc000001 100 #define I_B 0x48000000 101 #define I_BL 0x48000001 102 #define M_BCTR 0xfc0007fe 103 #define I_BCTR 0x4c000420 104 #define I_BCTRL 0x4c000421 105 #define M_RFI 0xfc0007fe 106 #define I_RFI 0x4c000064 107 108 #define inst_trap_return(ins) (((ins)&M_RFI) == I_RFI) 109 #define inst_return(ins) (((ins)&M_RTS) == I_RTS) 110 #define inst_call(ins) (((ins)&M_BC ) == I_BCL || \ 111 ((ins)&M_B ) == I_BL || \ 112 ((ins)&M_BCTR) == I_BCTRL || \ 113 ((ins)&M_RTS ) == I_BLRL ) 114 #define inst_branch(ins) (((ins)&M_BC ) == I_BC || \ 115 ((ins)&M_B ) == I_B || \ 116 ((ins)&M_BCTR) == I_BCTR ) 117 #define inst_unconditional_flow_transfer(ins) \ 118 (((ins)&M_B ) == I_B || \ 119 ((ins)&M_BCTR) == I_BCTR ) 120 #define inst_load(ins) 0 121 #define inst_store(ins) 0 122 #if defined(PPC_IBM4XX) || defined(PPC_BOOKE) 123 #define next_instr_address(v, b) ((db_addr_t) ((b) ? (v) : ((v) + 4))) 124 extern db_addr_t branch_taken(int, db_addr_t, db_regs_t *); 125 #endif 126 127 /* 128 * GDB's register array is: 129 * 32 4-byte GPRs 130 * 32 8-byte FPRs 131 * 7 4-byte UISA special-purpose registers 132 * 16 4-byte segment registers 133 * 32 4-byte standard OEA special-purpose registers, 134 * and up to 64 4-byte non-standard OES special-purpose registers. 135 * GDB keeps some extra space, so the total size of the register array 136 * they use is 880 bytes (gdb-5.0). 137 * KGDB_NUMREGS 220 138 */ 139 /* 140 * GDB's register array of gdb-6.0 is defined in 141 * usr/src/gnu/dist/gdb6/gdb/regformats/reg-ppc.dat 142 * GDB's register array is: 143 * 32 4-byte GPRs 144 * 32 8-byte FPRs 145 * 7 4-byte UISA special-purpose registers: pc, ps, cr, lr, ctr, xer, fpscr 146 * index of pc in array: 32 + 2*32 = 96 147 * size 32 * 4 + 32 * 8 + 7 * 4 = 103 * 4 = 412 bytes 148 * KGD_NUMREGS 103 149 */ 150 typedef long kgdb_reg_t; 151 #define KGDB_PPC_PC_REG 96 /* first UISA SP register */ 152 #define KGDB_PPC_MSR_REG 97 153 #define KGDB_PPC_CR_REG 98 154 #define KGDB_PPC_LR_REG 99 155 #define KGDB_PPC_CTR_REG 100 156 #define KGDB_PPC_XER_REG 101 157 #define KGDB_PPC_FPSCR_REG 102 158 #define KGDB_NUMREGS 103 /* Treat all registers as 4-byte */ 159 #define KGDB_BUFLEN (2*KGDB_NUMREGS*sizeof(kgdb_reg_t)+1) 160 161 #ifdef _KERNEL 162 163 void kdb_kintr(void *); 164 int kdb_trap(int, void *); 165 166 bool ddb_running_on_this_cpu_p(void); 167 bool ddb_running_on_any_cpu_p(void); 168 void db_resume_others(void); 169 170 /* 171 * We have machine-dependent commands. 172 */ 173 #define DB_MACHINE_COMMANDS 174 175 #endif /* _KERNEL */ 176 177 #endif /* _PPC_DB_MACHDEP_H_ */ 178