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 27 #ifndef _MACHINE_DB_MACHDEP_H_ 28 #define _MACHINE_DB_MACHDEP_H_ 29 30 #if 0 31 //#include <machine/frame.h> 32 //#include <machine/psl.h> 33 #endif 34 35 #ifndef TRUE 36 #define TRUE 1 37 #endif 38 39 #ifndef FALSE 40 #define FALSE 0 41 #endif 42 43 #define i386_saved_state trapframe 44 45 typedef vm_offset_t db_addr_t; /* address - unsigned */ 46 typedef int db_expr_t; /* expression - signed */ 47 48 typedef struct i386_saved_state db_regs_t; 49 extern db_regs_t ddb_regs; /* register state */ 50 #define DDB_REGS (&ddb_regs) 51 52 #define PC_REGS(regs) (((regs)->tf_cs & 0xfffc) == 0x08 \ 53 ? (db_addr_t)(regs)->tf_eip : 0) 54 55 #define BKPT_INST 0xcc /* breakpoint instruction */ 56 #define BKPT_SIZE (1) /* size of breakpoint inst */ 57 #define BKPT_SET(inst) (BKPT_INST) 58 59 #define FIXUP_PC_AFTER_BREAK ddb_regs.tf_eip -= 1; 60 61 #define db_clear_single_step(regs) ((regs)->tf_eflags &= ~PSL_T) 62 #define db_set_single_step(regs) ((regs)->tf_eflags |= PSL_T) 63 64 #define IS_BREAKPOINT_TRAP(type, code) ((type) == T_BPTFLT) 65 /* 66 * Watchpoints are not supported. The debug exception type is in %dr6 67 * and not yet in the args to this macro. 68 */ 69 #define IS_WATCHPOINT_TRAP(type, code) 0 70 71 #define I_CALL 0xe8 72 #define I_CALLI 0xff 73 #define I_RET 0xc3 74 #define I_IRET 0xcf 75 76 #define inst_trap_return(ins) (((ins)&0xff) == I_IRET) 77 #define inst_return(ins) (((ins)&0xff) == I_RET) 78 #define inst_call(ins) (((ins)&0xff) == I_CALL || \ 79 (((ins)&0xff) == I_CALLI && \ 80 ((ins)&0x3800) == 0x1000)) 81 #define inst_load(ins) 0 82 #define inst_store(ins) 0 83 84 /* 85 * There no interesting addresses below _kstack = 0xefbfe000. There 86 * are small absolute values for GUPROF, but we don't want to see them. 87 * Treat "negative" addresses below _kstack as non-small to allow for 88 * future reductions of _kstack and to avoid sign extension problems. 89 * 90 * There is one interesting symbol above -db_maxoff = 0xffff0000, 91 * namely _APTD = 0xfffff000. Accepting this would mess up the 92 * printing of small negative offsets. The next largest symbol is 93 * _APTmap = 0xffc00000. Accepting this is OK (unless db_maxoff is 94 * set to >= 0x400000 - (max stack offset)). 95 */ 96 #define DB_SMALL_VALUE_MAX 0x7fffffff 97 #define DB_SMALL_VALUE_MIN (-0x400001) 98 99 #endif /* !_MACHINE_DB_MACHDEP_H_ */ 100