1 /* Remote debugging interface for CPU32Bug Rom monitor for GDB, the GNU debugger.
2 Copyright 1995, 1996, 1998, 1999, 2000, 2001
3 Free Software Foundation, Inc.
4
5 Written by Stu Grossman of Cygnus Support
6
7 This file is part of GDB.
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 59 Temple Place - Suite 330,
22 Boston, MA 02111-1307, USA. */
23
24 #include "defs.h"
25 #include "gdbcore.h"
26 #include "target.h"
27 #include "monitor.h"
28 #include "serial.h"
29 #include "regcache.h"
30
31 #include "m68k-tdep.h"
32
33 static void cpu32bug_open (char *args, int from_tty);
34
35 static void
cpu32bug_supply_register(char * regname,int regnamelen,char * val,int vallen)36 cpu32bug_supply_register (char *regname, int regnamelen, char *val, int vallen)
37 {
38 int regno;
39
40 if (regnamelen != 2)
41 return;
42
43 switch (regname[0])
44 {
45 case 'S':
46 if (regname[1] != 'R')
47 return;
48 regno = PS_REGNUM;
49 break;
50 case 'P':
51 if (regname[1] != 'C')
52 return;
53 regno = PC_REGNUM;
54 break;
55 case 'D':
56 if (regname[1] < '0' || regname[1] > '7')
57 return;
58 regno = regname[1] - '0' + M68K_D0_REGNUM;
59 break;
60 case 'A':
61 if (regname[1] < '0' || regname[1] > '7')
62 return;
63 regno = regname[1] - '0' + M68K_A0_REGNUM;
64 break;
65 default:
66 return;
67 }
68
69 monitor_supply_register (regno, val);
70 }
71
72 /*
73 * This array of registers needs to match the indexes used by GDB. The
74 * whole reason this exists is because the various ROM monitors use
75 * different names than GDB does, and don't support all the
76 * registers either. So, typing "info reg sp" becomes an "A7".
77 */
78
79 static const char *
cpu32bug_regname(int index)80 cpu32bug_regname (int index)
81 {
82 static char *regnames[] =
83 {
84 "D0", "D1", "D2", "D3", "D4", "D5", "D6", "D7",
85 "A0", "A1", "A2", "A3", "A4", "A5", "A6", "A7",
86 "SR", "PC"
87 };
88
89 if ((index >= (sizeof (regnames) / sizeof (regnames[0])))
90 || (index < 0) || (index >= NUM_REGS))
91 return NULL;
92 else
93 return regnames[index];
94 }
95
96 /*
97 * Define the monitor command strings. Since these are passed directly
98 * through to a printf style function, we need can include formatting
99 * strings. We also need a CR or LF on the end.
100 */
101
102 static struct target_ops cpu32bug_ops;
103
104 static char *cpu32bug_inits[] =
105 {"\r", NULL};
106
107 static struct monitor_ops cpu32bug_cmds;
108
109 static void
init_cpu32bug_cmds(void)110 init_cpu32bug_cmds (void)
111 {
112 cpu32bug_cmds.flags = MO_CLR_BREAK_USES_ADDR;
113 cpu32bug_cmds.init = cpu32bug_inits; /* Init strings */
114 cpu32bug_cmds.cont = "g\r"; /* continue command */
115 cpu32bug_cmds.step = "t\r"; /* single step */
116 cpu32bug_cmds.stop = NULL; /* interrupt command */
117 cpu32bug_cmds.set_break = "br %x\r"; /* set a breakpoint */
118 cpu32bug_cmds.clr_break = "nobr %x\r"; /* clear a breakpoint */
119 cpu32bug_cmds.clr_all_break = "nobr\r"; /* clear all breakpoints */
120 cpu32bug_cmds.fill = "bf %x:%x %x;b\r"; /* fill (start count val) */
121 cpu32bug_cmds.setmem.cmdb = "ms %x %02x\r"; /* setmem.cmdb (addr, value) */
122 cpu32bug_cmds.setmem.cmdw = "ms %x %04x\r"; /* setmem.cmdw (addr, value) */
123 cpu32bug_cmds.setmem.cmdl = "ms %x %08x\r"; /* setmem.cmdl (addr, value) */
124 cpu32bug_cmds.setmem.cmdll = NULL; /* setmem.cmdll (addr, value) */
125 cpu32bug_cmds.setmem.resp_delim = NULL; /* setreg.resp_delim */
126 cpu32bug_cmds.setmem.term = NULL; /* setreg.term */
127 cpu32bug_cmds.setmem.term_cmd = NULL; /* setreg.term_cmd */
128 cpu32bug_cmds.getmem.cmdb = "md %x:%x;b\r"; /* getmem.cmdb (addr, len) */
129 cpu32bug_cmds.getmem.cmdw = "md %x:%x;b\r"; /* getmem.cmdw (addr, len) */
130 cpu32bug_cmds.getmem.cmdl = "md %x:%x;b\r"; /* getmem.cmdl (addr, len) */
131 cpu32bug_cmds.getmem.cmdll = NULL; /* getmem.cmdll (addr, len) */
132 cpu32bug_cmds.getmem.resp_delim = " "; /* getmem.resp_delim */
133 cpu32bug_cmds.getmem.term = NULL; /* getmem.term */
134 cpu32bug_cmds.getmem.term_cmd = NULL; /* getmem.term_cmd */
135 cpu32bug_cmds.setreg.cmd = "rs %s %x\r"; /* setreg.cmd (name, value) */
136 cpu32bug_cmds.setreg.resp_delim = NULL; /* setreg.resp_delim */
137 cpu32bug_cmds.setreg.term = NULL; /* setreg.term */
138 cpu32bug_cmds.setreg.term_cmd = NULL; /* setreg.term_cmd */
139 cpu32bug_cmds.getreg.cmd = "rs %s\r"; /* getreg.cmd (name) */
140 cpu32bug_cmds.getreg.resp_delim = "="; /* getreg.resp_delim */
141 cpu32bug_cmds.getreg.term = NULL; /* getreg.term */
142 cpu32bug_cmds.getreg.term_cmd = NULL; /* getreg.term_cmd */
143 cpu32bug_cmds.dump_registers = "rd\r"; /* dump_registers */
144 cpu32bug_cmds.register_pattern = "\\(\\w+\\) +=\\([0-9a-fA-F]+\\b\\)"; /* register_pattern */
145 cpu32bug_cmds.supply_register = cpu32bug_supply_register; /* supply_register */
146 cpu32bug_cmds.load_routine = NULL; /* load_routine (defaults to SRECs) */
147 cpu32bug_cmds.load = "lo\r"; /* download command */
148 cpu32bug_cmds.loadresp = "\n"; /* load response */
149 cpu32bug_cmds.prompt = "CPU32Bug>"; /* monitor command prompt */
150 cpu32bug_cmds.line_term = "\r"; /* end-of-line terminator */
151 cpu32bug_cmds.cmd_end = NULL; /* optional command terminator */
152 cpu32bug_cmds.target = &cpu32bug_ops; /* target operations */
153 cpu32bug_cmds.stopbits = SERIAL_1_STOPBITS; /* number of stop bits */
154 cpu32bug_cmds.regnames = NULL; /* registers names */
155 cpu32bug_cmds.regname = cpu32bug_regname;
156 cpu32bug_cmds.magic = MONITOR_OPS_MAGIC; /* magic */
157 }; /* init_cpu32bug_cmds */
158
159 static void
cpu32bug_open(char * args,int from_tty)160 cpu32bug_open (char *args, int from_tty)
161 {
162 monitor_open (args, &cpu32bug_cmds, from_tty);
163 }
164
165 extern initialize_file_ftype _initialize_cpu32bug_rom; /* -Wmissing-prototypes */
166
167 void
_initialize_cpu32bug_rom(void)168 _initialize_cpu32bug_rom (void)
169 {
170 init_cpu32bug_cmds ();
171 init_monitor_ops (&cpu32bug_ops);
172
173 cpu32bug_ops.to_shortname = "cpu32bug";
174 cpu32bug_ops.to_longname = "CPU32Bug monitor";
175 cpu32bug_ops.to_doc = "Debug via the CPU32Bug monitor.\n\
176 Specify the serial device it is connected to (e.g. /dev/ttya).";
177 cpu32bug_ops.to_open = cpu32bug_open;
178
179 add_target (&cpu32bug_ops);
180 }
181