2 * Mach Operating System
3 * Copyright (c) 1991,1990 Carnegie Mellon University
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.
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.
16 * Carnegie Mellon requests users of this software to return to
18 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
19 * School of Computer Science
20 * Carnegie Mellon University
21 * Pittsburgh PA 15213-3890
23 * any improvements or extensions that they make and grant Carnegie Mellon
24 * the rights to redistribute these changes.
29 #ifndef _MACHINE_DB_MACHDEP_H_
30 #define _MACHINE_DB_MACHDEP_H_
32 #include <machine/frame.h>
33 #include <machine/reg.h>
34 #include <machine/trap.h>
36 typedef vm_offset_t db_addr_t; /* address - unsigned */
37 typedef long db_expr_t; /* expression - signed */
39 #define PC_REGS() ((db_addr_t)kdb_thrctx->pcb_rip)
41 #define BKPT_INST 0xcc /* breakpoint instruction */
42 #define BKPT_SIZE (1) /* size of breakpoint inst */
43 #define BKPT_SET(inst) (BKPT_INST)
47 kdb_frame->tf_rip += 1; \
48 kdb_thrctx->pcb_rip += 1; \
51 #define FIXUP_PC_AFTER_BREAK \
53 kdb_frame->tf_rip -= 1; \
54 kdb_thrctx->pcb_rip -= 1; \
57 #define db_clear_single_step kdb_cpu_clear_singlestep
58 #define db_set_single_step kdb_cpu_set_singlestep
61 * The debug exception type is copied from %dr6 to 'code' and used to
62 * disambiguate single step traps. Watchpoints have no special support.
63 * Our hardware breakpoints are not well integrated with ddb and are too
64 * different from watchpoints. ddb treats them as unknown traps with
65 * unknown addresses and doesn't turn them off while it is running.
67 #define IS_BREAKPOINT_TRAP(type, code) ((type) == T_BPTFLT)
68 #define IS_SSTEP_TRAP(type, code) \
69 ((type) == T_TRCTRAP && (code) & DBREG_DR6_BS)
70 #define IS_WATCHPOINT_TRAP(type, code) 0
74 #define i_calli(ins) (((ins)&0xff) == I_CALLI && ((ins)&0x3800) == 0x1000)
77 #define i_rex(ins) (((ins) & 0xff) == 0x41 || ((ins) & 0xff) == 0x43)
79 #define inst_trap_return(ins) (((ins)&0xff) == I_IRET)
80 #define inst_return(ins) (((ins)&0xff) == I_RET)
81 #define inst_call(ins) (((ins)&0xff) == I_CALL || i_calli(ins) || \
82 (i_calli((ins) >> 8) && i_rex(ins)))
83 #define inst_load(ins) 0
84 #define inst_store(ins) 0
86 #endif /* !_MACHINE_DB_MACHDEP_H_ */