Annotation of sys/arch/m68k/include/db_machdep.h, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: db_machdep.h,v 1.10 2005/11/13 17:50:44 fgsch Exp $ */
2: /* $NetBSD: db_machdep.h,v 1.20 1997/06/26 01:26:58 thorpej Exp $ */
3:
4: /*
5: * Mach Operating System
6: * Copyright (c) 1992 Carnegie Mellon University
7: * All Rights Reserved.
8: *
9: * Permission to use, copy, modify and distribute this software and its
10: * documentation is hereby granted, provided that both the copyright
11: * notice and this permission notice appear in all copies of the
12: * software, derivative works or modified versions, and any portions
13: * thereof, and that both notices appear in supporting documentation.
14: *
15: * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
16: * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
17: * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
18: *
19: * Carnegie Mellon requests users of this software to return to
20: *
21: * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
22: * School of Computer Science
23: * Carnegie Mellon University
24: * Pittsburgh PA 15213-3890
25: *
26: * any improvements or extensions that they make and grant Carnegie Mellon
27: * the rights to redistribute these changes.
28: */
29:
30: /*
31: * Machine-dependent defines for new kernel debugger.
32: */
33: #ifndef _M68K_DB_MACHDEP_H_
34: #define _M68K_DB_MACHDEP_H_
35:
36: #include <sys/types.h>
37:
38: /*
39: * XXX - Would rather not pull in vm headers, but need boolean_t,
40: * at least until boolean_t moves to <sys/types.h> or someplace.
41: */
42: #include <uvm/uvm_param.h>
43:
44: #include <machine/frame.h>
45: #include <machine/psl.h>
46: #include <machine/trap.h>
47:
48: typedef vaddr_t db_addr_t; /* address - unsigned */
49: typedef long db_expr_t; /* expression - signed */
50: typedef struct trapframe db_regs_t;
51:
52: extern db_regs_t ddb_regs; /* register state */
53: #define DDB_REGS (&ddb_regs)
54:
55: #define PC_REGS(regs) ((db_addr_t)(regs)->tf_pc)
56: #define SET_PC_REGS(regs, value) (regs)->tf_pc = (unsigned int)(value)
57:
58: #define BKPT_INST 0x4e4f /* breakpoint instruction */
59: #define BKPT_SIZE (2) /* size of breakpoint inst */
60: #define BKPT_SET(inst) (BKPT_INST)
61:
62: #define FIXUP_PC_AFTER_BREAK(regs) ((regs)->tf_pc -= BKPT_SIZE)
63:
64: #define db_clear_single_step(regs) ((regs)->tf_sr &= ~PSL_T)
65: #define db_set_single_step(regs) ((regs)->tf_sr |= PSL_T)
66:
67: #define IS_BREAKPOINT_TRAP(type, code) ((type) == T_BREAKPOINT)
68: #ifdef T_WATCHPOINT
69: #define IS_WATCHPOINT_TRAP(type, code) ((type) == T_WATCHPOINT)
70: #else
71: #define IS_WATCHPOINT_TRAP(type, code) 0
72: #endif
73:
74: #define M_RTS 0xffff0000
75: #define I_RTS 0x4e750000
76: #define M_JSR 0xffc00000
77: #define I_JSR 0x4e800000
78: #define M_BSR 0xff000000
79: #define I_BSR 0x61000000
80: #define M_RTE 0xffff0000
81: #define I_RTE 0x4e730000
82:
83: #define inst_trap_return(ins) (((ins)&M_RTE) == I_RTE)
84: #define inst_return(ins) (((ins)&M_RTS) == I_RTS)
85: #define inst_call(ins) (((ins)&M_JSR) == I_JSR || \
86: ((ins)&M_BSR) == I_BSR)
87: #define inst_load(ins) 0
88: #define inst_store(ins) 0
89:
90: /*
91: * Things needed by kgdb:
92: */
93: typedef long kgdb_reg_t;
94: #define KGDB_NUMREGS (16+2)
95: #define KGDB_BUFLEN 512
96:
97: #ifdef _KERNEL
98:
99: #define KGDB_ENTER __asm __volatile("trap #15")
100:
101: void Debugger(void); /* XXX */
102: void kdb_kintr(db_regs_t *);
103: int kdb_trap(int, db_regs_t *);
104:
105: #endif /* _KERNEL */
106:
107: /*
108: * We use a.out symbols in DDB.
109: */
110: #define DB_AOUT_SYMBOLS
111:
112: #endif /* _M68K_DB_MACHDEP_H_ */
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