1 /* $OpenBSD: db_machdep.h,v 1.2 1997/03/21 00:48:48 niklas Exp $ */ 2 /* $NetBSD: db_machdep.h,v 1.30 2021/03/11 08:33:34 simonb 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 (at) 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 #if defined(_KERNEL_OPT) 37 #include "opt_ppcarch.h" 38 #endif 39 40 #include <uvm/uvm_prot.h> 41 #include <uvm/uvm_param.h> 42 #include <machine/trap.h> 43 44 #define DB_ELF_SYMBOLS 45 46 typedef vaddr_t db_addr_t; /* address - unsigned */ 47 #define DDB_EXPR_FMT "l" /* expression is long */ 48 typedef long db_expr_t; /* expression - signed */ 49 struct powerpc_saved_state { 50 u_int32_t r[32]; /* data registers */ 51 u_int32_t iar; 52 u_int32_t msr; 53 u_int32_t lr; 54 u_int32_t ctr; 55 u_int32_t cr; 56 u_int32_t xer; 57 u_int32_t mq; 58 u_int32_t dear; 59 u_int32_t esr; 60 u_int32_t pid; 61 }; 62 typedef struct powerpc_saved_state db_regs_t; 63 extern db_regs_t ddb_regs; /* register state */ 64 #define DDB_REGS (&ddb_regs) 65 66 #define PC_REGS(regs) (*(db_addr_t *)&(regs)->iar) 67 68 #define BKPT_ADDR(addr) (addr) /* breakpoint address */ 69 #define BKPT_ASM "trap" /* should match BKPT_INST */ 70 #define BKPT_INST 0x7fe00008 /* breakpoint instruction */ 71 #define BKPT_SIZE (4) /* size of breakpoint inst */ 72 #define BKPT_SET(inst, addr) (BKPT_INST) 73 74 #if !defined(PPC_BOOKE) && !defined(PPC_IBM4XX) 75 #define SR_SINGLESTEP 0x400 /* PSL_SE, available only for oea */ 76 #define db_clear_single_step(regs) ((regs)->msr &= ~SR_SINGLESTEP) 77 #define db_set_single_step(regs) ((regs)->msr |= SR_SINGLESTEP) 78 #else 79 #define SOFTWARE_SSTEP 80 #endif 81 82 #define T_BREAKPOINT 0xffff 83 #define IS_BREAKPOINT_TRAP(type, code) ((type) == T_BREAKPOINT) 84 85 #define T_WATCHPOINT 0xeeee 86 #ifdef T_WATCHPOINT 87 #define IS_WATCHPOINT_TRAP(type, code) ((type) == T_WATCHPOINT) 88 #else 89 #define IS_WATCHPOINT_TRAP(type, code) 0 90 #endif 91 92 #define M_RTS 0xfc0007ff 93 #define I_RTS 0x4c000020 94 #define I_BLRL 0x4c000021 95 #define M_BC 0xfc000001 96 #define I_BC 0x40000000 97 #define I_BCL 0x40000001 98 #define M_B 0xfc000001 99 #define I_B 0x48000000 100 #define I_BL 0x48000001 101 #define M_BCTR 0xfc0007ff 102 #define I_BCTR 0x4c000420 103 #define I_BCTRL 0x4c000421 104 #define M_RFI 0xfc0007fe 105 #define I_RFI 0x4c000064 106 107 #define inst_trap_return(ins) (((ins)&M_RFI) == I_RFI) 108 #define inst_return(ins) (((ins)&M_RTS) == I_RTS) 109 #define inst_call(ins) (((ins)&M_BC ) == I_BCL || \ 110 ((ins)&M_B ) == I_BL || \ 111 ((ins)&M_BCTR) == I_BCTRL || \ 112 ((ins)&M_RTS ) == I_BLRL ) 113 #define inst_branch(ins) (((ins)&M_BC ) == I_BC || \ 114 ((ins)&M_B ) == I_B || \ 115 ((ins)&M_BCTR) == I_BCTR ) 116 #define inst_unconditional_flow_transfer(ins) \ 117 (((ins)&M_B ) == I_B || \ 118 ((ins)&M_BCTR) == I_BCTR ) 119 #define inst_load(ins) 0 120 #define inst_store(ins) 0 121 #if defined(PPC_IBM4XX) || defined(PPC_BOOKE) 122 #define next_instr_address(v, b) ((db_addr_t) ((b) ? (v) : ((v) + 4))) 123 extern db_addr_t branch_taken(int, db_addr_t, db_regs_t *); 124 #endif 125 126 /* 127 * GDB's register array is: 128 * 32 4-byte GPRs 129 * 32 8-byte FPRs 130 * 7 4-byte UISA special-purpose registers 131 * 16 4-byte segment registers 132 * 32 4-byte standard OEA special-purpose registers, 133 * and up to 64 4-byte non-standard OES special-purpose registers. 134 * GDB keeps some extra space, so the total size of the register array 135 * they use is 880 bytes (gdb-5.0). 136 * KGDB_NUMREGS 220 137 */ 138 /* 139 * GDB's register array of gdb-6.0 is defined in 140 * usr/src/gnu/dist/gdb6/gdb/regformats/reg-ppc.dat 141 * GDB's register array is: 142 * 32 4-byte GPRs 143 * 32 8-byte FPRs 144 * 7 4-byte UISA special-purpose registers: pc, ps, cr, lr, ctr, xer, fpscr 145 * index of pc in array: 32 + 2*32 = 96 146 * size 32 * 4 + 32 * 8 + 7 * 4 = 103 * 4 = 412 bytes 147 * KGD_NUMREGS 103 148 */ 149 typedef long kgdb_reg_t; 150 #define KGDB_PPC_PC_REG 96 /* first UISA SP register */ 151 #define KGDB_PPC_MSR_REG 97 152 #define KGDB_PPC_CR_REG 98 153 #define KGDB_PPC_LR_REG 99 154 #define KGDB_PPC_CTR_REG 100 155 #define KGDB_PPC_XER_REG 101 156 #define KGDB_PPC_FPSCR_REG 102 157 #define KGDB_NUMREGS 103 /* Treat all registers as 4-byte */ 158 #define KGDB_BUFLEN (2*KGDB_NUMREGS*sizeof(kgdb_reg_t)+1) 159 160 #ifdef _KERNEL 161 162 void kdb_kintr(void *); 163 int kdb_trap(int, void *); 164 165 bool ddb_running_on_this_cpu_p(void); 166 bool ddb_running_on_any_cpu_p(void); 167 void db_resume_others(void); 168 169 /* 170 * We have machine-dependent commands. 171 */ 172 #define DB_MACHINE_COMMANDS 173 174 #endif /* _KERNEL */ 175 176 #endif /* _PPC_DB_MACHDEP_H_ */ 177
Indexes created Sat Sep 20 22:09:52 GMT 2025