1 /* 2 * Mach Operating System 3 * Copyright (c) 1991,1990 Carnegie Mellon University 4 * All Rights Reserved. 5 * 6 * Permission to use, copy, modify and distribute this software and its 7 * documentation is hereby granted, provided that both the copyright 8 * notice and this permission notice appear in all copies of the 9 * software, derivative works or modified versions, and any portions 10 * thereof, and that both notices appear in supporting documentation. 11 * 12 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 13 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR 14 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 15 * 16 * Carnegie Mellon requests users of this software to return to 17 * 18 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 19 * School of Computer Science 20 * Carnegie Mellon University 21 * Pittsburgh PA 15213-3890 22 * 23 * any improvements or extensions that they make and grant Carnegie Mellon 24 * the rights to redistribute these changes. 25 * 26 * $FreeBSD$ 27 */ 28 29 #ifndef _MACHINE_DB_MACHDEP_H_ 30 #define _MACHINE_DB_MACHDEP_H_ 31 32 #include <machine/frame.h> 33 #include <machine/psl.h> 34 #include <machine/trap.h> 35 36 #define amd64_saved_state trapframe 37 38 typedef vm_offset_t db_addr_t; /* address - unsigned */ 39 typedef long db_expr_t; /* expression - signed */ 40 41 typedef struct amd64_saved_state db_regs_t; 42 extern db_regs_t ddb_regs; /* register state */ 43 #define DDB_REGS (&ddb_regs) 44 45 #define PC_REGS(regs) ((db_addr_t)(regs)->tf_rip) 46 47 #define BKPT_INST 0xcc /* breakpoint instruction */ 48 #define BKPT_SIZE (1) /* size of breakpoint inst */ 49 #define BKPT_SET(inst) (BKPT_INST) 50 51 #define BKPT_SKIP ddb_regs.tf_rip += 1 52 53 #define FIXUP_PC_AFTER_BREAK ddb_regs.tf_rip -= 1; 54 55 #define db_clear_single_step(regs) ((regs)->tf_rflags &= ~PSL_T) 56 #define db_set_single_step(regs) ((regs)->tf_rflags |= PSL_T) 57 58 #define IS_BREAKPOINT_TRAP(type, code) ((type) == T_BPTFLT) 59 /* 60 * Watchpoints are not supported. The debug exception type is in %dr6 61 * and not yet in the args to this macro. 62 */ 63 #define IS_WATCHPOINT_TRAP(type, code) 0 64 65 #define I_CALL 0xe8 66 #define I_CALLI 0xff 67 #define I_RET 0xc3 68 #define I_IRET 0xcf 69 70 #define inst_trap_return(ins) (((ins)&0xff) == I_IRET) 71 #define inst_return(ins) (((ins)&0xff) == I_RET) 72 #define inst_call(ins) (((ins)&0xff) == I_CALL || \ 73 (((ins)&0xff) == I_CALLI && \ 74 ((ins)&0x3800) == 0x1000)) 75 #define inst_load(ins) 0 76 #define inst_store(ins) 0 77 78 /* 79 * There no interesting addresses below _kstack = 0xefbfe000. There 80 * are small absolute values for GUPROF, but we don't want to see them. 81 * Treat "negative" addresses below _kstack as non-small to allow for 82 * future reductions of _kstack and to avoid sign extension problems. 83 * 84 * There is one interesting symbol above -db_maxoff = 0xffff0000, 85 * namely _APTD = 0xfffff000. Accepting this would mess up the 86 * printing of small negative offsets. The next largest symbol is 87 * _APTmap = 0xffc00000. Accepting this is OK (unless db_maxoff is 88 * set to >= 0x400000 - (max stack offset)). 89 */ 90 #define DB_SMALL_VALUE_MAX 0x7fffffff 91 #define DB_SMALL_VALUE_MIN (-0x400001) 92 93 #endif /* !_MACHINE_DB_MACHDEP_H_ */ 94