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: src/sys/amd64/include/db_machdep.h,v 1.22 2005/01/05 20:17:20 imp Exp $
27 */
28
29 #ifndef _MACHINE_DB_MACHDEP_H_
30 #define _MACHINE_DB_MACHDEP_H_
31
32 #include <machine/frame.h>
33 #include <machine/trap.h>
34
35 typedef vm_offset_t db_addr_t; /* address - unsigned */
36 typedef long db_expr_t; /* expression - signed */
37
38 #define PC_REGS() ((db_addr_t)kdb_thrctx->pcb_rip)
39
40 #define BKPT_INST 0xcc /* breakpoint instruction */
41 #define BKPT_SIZE (1) /* size of breakpoint inst */
42 #define BKPT_SET(inst) (BKPT_INST)
43
44 #define BKPT_SKIP \
45 do { \
46 kdb_frame->tf_rip += 1; \
47 kdb_thrctx->pcb_rip += 1; \
48 } while(0)
49
50 #define FIXUP_PC_AFTER_BREAK \
51 do { \
52 kdb_frame->tf_rip -= 1; \
53 kdb_thrctx->pcb_rip -= 1; \
54 } while(0);
55
56 #define db_clear_single_step kdb_cpu_clear_singlestep
57 #define db_set_single_step kdb_cpu_set_singlestep
58
59 #define IS_BREAKPOINT_TRAP(type, code) ((type) == T_BPTFLT)
60 /*
61 * Watchpoints are not supported. The debug exception type is in %dr6
62 * and not yet in the args to this macro.
63 */
64 #define IS_WATCHPOINT_TRAP(type, code) 0
65
66 #define I_CALL 0xe8
67 #define I_CALLI 0xff
68 #define I_RET 0xc3
69 #define I_IRET 0xcf
70
71 #define inst_trap_return(ins) (((ins)&0xff) == I_IRET)
72 #define inst_return(ins) (((ins)&0xff) == I_RET)
73 #define inst_call(ins) (((ins)&0xff) == I_CALL || \
74 (((ins)&0xff) == I_CALLI && \
75 ((ins)&0x3800) == 0x1000))
76 #define inst_load(ins) 0
77 #define inst_store(ins) 0
78
79 /*
80 * There no interesting addresses below _kstack = 0xefbfe000. There
81 * are small absolute values for GUPROF, but we don't want to see them.
82 * Treat "negative" addresses below _kstack as non-small to allow for
83 * future reductions of _kstack and to avoid sign extension problems.
84 *
85 * There is one interesting symbol above -db_maxoff = 0xffff0000,
86 * namely _APTD = 0xfffff000. Accepting this would mess up the
87 * printing of small negative offsets. The next largest symbol is
88 * _APTmap = 0xffc00000. Accepting this is OK (unless db_maxoff is
89 * set to >= 0x400000 - (max stack offset)).
90 */
91 #define DB_SMALL_VALUE_MAX 0x7fffffff
92 #define DB_SMALL_VALUE_MIN (-0x400001)
93
94 #endif /* !_MACHINE_DB_MACHDEP_H_ */
95 Cache object: b817376b8502bf888150d475af2e5773
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