1 /* $OpenBSD: db_machdep.h,v 1.21 2019/11/07 14:44:53 mpi Exp $ */ 2 3 /* 4 * Copyright (c) 1998-2005 Michael Shalayeff 5 * All rights reserved. 6 * 7 * Permission to use, copy, modify, and distribute this software for any 8 * purpose with or without fee is hereby granted, provided that the above 9 * copyright notice and this permission notice appear in all copies. 10 * 11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 15 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER IN 16 * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT 17 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 18 */ 19 20 #ifndef _MACHINE_DB_MACHDEP_H_ 21 #define _MACHINE_DB_MACHDEP_H_ 22 23 #include <uvm/uvm_extern.h> 24 25 /* types the generic ddb module needs */ 26 typedef vaddr_t db_addr_t; 27 typedef long db_expr_t; 28 29 typedef struct trapframe db_regs_t; 30 extern db_regs_t ddb_regs; 31 32 #define PC_REGS(regs) ((vaddr_t)(regs)->tf_iioq_head) 33 #define SET_PC_REGS(regs, value) \ 34 do { \ 35 (regs)->tf_iioq_tail = 4 + \ 36 ((regs)->tf_iioq_head = (value)); \ 37 } while (0) 38 39 /* Breakpoint related definitions */ 40 #define BKPT_INST 0x00010000 /* break 0,8 */ 41 #define BKPT_SIZE sizeof(int) 42 #define BKPT_SET(inst) BKPT_INST 43 44 #define IS_BREAKPOINT_TRAP(type, code) ((type) == T_IBREAK) 45 #define IS_WATCHPOINT_TRAP(type, code) ((type) == T_DBREAK) 46 47 #define FIXUP_PC_AFTER_BREAK(regs) ((regs)->tf_iioq_head -= sizeof(int)) 48 49 #define DB_VALID_BREAKPOINT(addr) db_valid_breakpoint(addr) 50 51 static __inline int inst_call(u_int ins) { 52 return (ins & 0xfc00e000) == 0xe8000000 || 53 (ins & 0xfc00e000) == 0xe8004000 || 54 (ins & 0xfc000000) == 0xe4000000; 55 } 56 static __inline int inst_branch(u_int ins) { 57 return (ins & 0xf0000000) == 0xe0000000 || 58 (ins & 0xf0000000) == 0xc0000000 || 59 (ins & 0xf0000000) == 0xa0000000 || 60 (ins & 0xf0000000) == 0x80000000; 61 } 62 static __inline int inst_return(u_int ins) { 63 return (ins & 0xfc00e000) == 0xe800c000 || 64 (ins & 0xfc000000) == 0xe0000000; 65 } 66 static __inline int inst_trap_return(u_int ins) { 67 return (ins & 0xfc001fc0) == 0x00000ca0; 68 } 69 70 #if 0 71 #define db_clear_single_step(r) ((r)->tf_flags &= ~(PSL_Z)) 72 #define db_set_single_step(r) ((r)->tf_flags |= (PSL_Z)) 73 #else 74 #define SOFTWARE_SSTEP 1 75 #define SOFTWARE_SSTEP_EMUL 1 76 77 static __inline vaddr_t 78 next_instr_address(vaddr_t addr, int b) { 79 return (addr + 4); 80 } 81 82 #define branch_taken(ins,pc,f,regs) branch_taken1(ins, pc, regs) 83 static __inline vaddr_t 84 branch_taken1(int ins, vaddr_t pc, db_regs_t *regs) { 85 return (pc); 86 } 87 88 #endif 89 90 int db_valid_breakpoint(vaddr_t); 91 int db_ktrap(int, int, db_regs_t *); 92 93 #endif /* _MACHINE_DB_MACHDEP_H_ */ 94