1 /* Remote debugging interface to dBUG ROM monitor for GDB, the GNU debugger.
2 Copyright (C) 1996-2013 Free Software Foundation, Inc.
3
4 Written by Stan Shebs of Cygnus Support.
5
6 This file is part of GDB.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>. */
20
21 /* dBUG is a monitor supplied on various Motorola boards, including
22 m68k, ColdFire, and PowerPC-based designs. The code here assumes
23 the ColdFire, and (as of 9/25/96) has only been tested with a
24 ColdFire IDP board. */
25
26 #include "defs.h"
27 #include "gdbcore.h"
28 #include "target.h"
29 #include "monitor.h"
30 #include "serial.h"
31 #include "regcache.h"
32
33 #include "m68k-tdep.h"
34
35 static void dbug_open (char *args, int from_tty);
36
37 static void
dbug_supply_register(struct regcache * regcache,char * regname,int regnamelen,char * val,int vallen)38 dbug_supply_register (struct regcache *regcache, char *regname,
39 int regnamelen, char *val, int vallen)
40 {
41 int regno;
42 struct gdbarch *gdbarch = get_regcache_arch (regcache);
43
44 if (regnamelen != 2)
45 return;
46
47 switch (regname[0])
48 {
49 case 'S':
50 if (regname[1] != 'R')
51 return;
52 regno = gdbarch_ps_regnum (gdbarch);
53 break;
54 case 'P':
55 if (regname[1] != 'C')
56 return;
57 regno = gdbarch_pc_regnum (gdbarch);
58 break;
59 case 'D':
60 if (regname[1] < '0' || regname[1] > '7')
61 return;
62 regno = regname[1] - '0' + M68K_D0_REGNUM;
63 break;
64 case 'A':
65 if (regname[1] < '0' || regname[1] > '7')
66 return;
67 regno = regname[1] - '0' + M68K_A0_REGNUM;
68 break;
69 default:
70 return;
71 }
72
73 monitor_supply_register (regcache, regno, val);
74 }
75
76 /* This array of registers needs to match the indexes used by GDB.
77 The whole reason this exists is because the various ROM monitors
78 use different names than GDB does, and don't support all the
79 registers either. So, typing "info reg sp" becomes an "A7". */
80
81 static const char *
dbug_regname(int index)82 dbug_regname (int index)
83 {
84 static char *regnames[] =
85 {
86 "D0", "D1", "D2", "D3", "D4", "D5", "D6", "D7",
87 "A0", "A1", "A2", "A3", "A4", "A5", "A6", "A7",
88 "SR", "PC"
89 /* no float registers */
90 };
91
92 if (index >= ARRAY_SIZE (regnames) || index < 0)
93 return NULL;
94 else
95 return regnames[index];
96
97 }
98
99 static struct target_ops dbug_ops;
100 static struct monitor_ops dbug_cmds;
101
102 static char *dbug_inits[] =
103 {"\r", NULL};
104
105
106 static void
init_dbug_cmds(void)107 init_dbug_cmds (void)
108 {
109 dbug_cmds.flags = MO_CLR_BREAK_USES_ADDR
110 | MO_GETMEM_NEEDS_RANGE | MO_FILL_USES_ADDR;
111 dbug_cmds.init = dbug_inits; /* Init strings */
112 dbug_cmds.cont = "go\r"; /* continue command */
113 dbug_cmds.step = "trace\r"; /* single step */
114 dbug_cmds.stop = NULL; /* interrupt command */
115 dbug_cmds.set_break = "br %x\r"; /* set a breakpoint */
116 dbug_cmds.clr_break = "br -r %x\r"; /* clear a breakpoint */
117 dbug_cmds.clr_all_break = "br -r\r"; /* clear all breakpoints */
118 dbug_cmds.fill = "bf.b %x %x %x\r"; /* fill (start end val) */
119 dbug_cmds.setmem.cmdb = "mm.b %x %x\r"; /* setmem.cmdb (addr, value) */
120 dbug_cmds.setmem.cmdw = "mm.w %x %x\r"; /* setmem.cmdw (addr, value) */
121 dbug_cmds.setmem.cmdl = "mm.l %x %x\r"; /* setmem.cmdl (addr, value) */
122 dbug_cmds.setmem.cmdll = NULL; /* setmem.cmdll (addr, value) */
123 dbug_cmds.setmem.resp_delim = NULL; /* setmem.resp_delim */
124 dbug_cmds.setmem.term = NULL; /* setmem.term */
125 dbug_cmds.setmem.term_cmd = NULL; /* setmem.term_cmd */
126 dbug_cmds.getmem.cmdb = "md.b %x %x\r"; /* getmem.cmdb (addr, addr2) */
127 dbug_cmds.getmem.cmdw = "md.w %x %x\r"; /* getmem.cmdw (addr, addr2) */
128 dbug_cmds.getmem.cmdl = "md.l %x %x\r"; /* getmem.cmdl (addr, addr2) */
129 dbug_cmds.getmem.cmdll = NULL; /* getmem.cmdll (addr, addr2) */
130 dbug_cmds.getmem.resp_delim = ":"; /* getmem.resp_delim */
131 dbug_cmds.getmem.term = NULL; /* getmem.term */
132 dbug_cmds.getmem.term_cmd = NULL; /* getmem.term_cmd */
133 dbug_cmds.setreg.cmd = "rm %s %x\r"; /* setreg.cmd (name, value) */
134 dbug_cmds.setreg.resp_delim = NULL; /* setreg.resp_delim */
135 dbug_cmds.setreg.term = NULL; /* setreg.term */
136 dbug_cmds.setreg.term_cmd = NULL; /* setreg.term_cmd */
137 dbug_cmds.getreg.cmd = "rd %s\r"; /* getreg.cmd (name) */
138 dbug_cmds.getreg.resp_delim = ":"; /* getreg.resp_delim */
139 dbug_cmds.getreg.term = NULL; /* getreg.term */
140 dbug_cmds.getreg.term_cmd = NULL; /* getreg.term_cmd */
141 dbug_cmds.dump_registers = "rd\r"; /* dump_registers */
142 /* register_pattern */
143 dbug_cmds.register_pattern = "\\(\\w+\\) +:\\([0-9a-fA-F]+\\b\\)";
144 dbug_cmds.supply_register = dbug_supply_register;
145 dbug_cmds.load = "dl\r"; /* download command */
146 dbug_cmds.loadresp = "\n"; /* load response */
147 dbug_cmds.prompt = "dBUG>"; /* monitor command prompt */
148 dbug_cmds.line_term = "\r"; /* end-of-line terminator */
149 dbug_cmds.cmd_end = NULL; /* optional command terminator */
150 dbug_cmds.target = &dbug_ops; /* target operations */
151 dbug_cmds.stopbits = SERIAL_1_STOPBITS; /* number of stop bits */
152 dbug_cmds.regnames = NULL; /* registers names */
153 dbug_cmds.regname = dbug_regname;
154 dbug_cmds.magic = MONITOR_OPS_MAGIC; /* magic */
155 } /* init_debug_ops */
156
157 static void
dbug_open(char * args,int from_tty)158 dbug_open (char *args, int from_tty)
159 {
160 monitor_open (args, &dbug_cmds, from_tty);
161 }
162
163 extern initialize_file_ftype _initialize_dbug_rom; /* -Wmissing-prototypes */
164
165 void
_initialize_dbug_rom(void)166 _initialize_dbug_rom (void)
167 {
168 init_dbug_cmds ();
169 init_monitor_ops (&dbug_ops);
170
171 dbug_ops.to_shortname = "dbug";
172 dbug_ops.to_longname = "dBUG monitor";
173 dbug_ops.to_doc = "Debug via the dBUG monitor.\n\
174 Specify the serial device it is connected to (e.g. /dev/ttya).";
175 dbug_ops.to_open = dbug_open;
176
177 add_target (&dbug_ops);
178 }
179