1 /* Remote debugging interface for ABug Rom monitor for GDB, the GNU debugger.
2 Copyright 1995, 1996, 1998, 1999, 2000, 2001
3 Free Software Foundation, Inc.
4
5 Written by Rob Savoye 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 /* Prototypes for local functions. */
34
35 static void abug_open (char *args, int from_tty);
36
37 static void
abug_supply_register(char * regname,int regnamelen,char * val,int vallen)38 abug_supply_register (char *regname, int regnamelen, char *val, int vallen)
39 {
40 int regno;
41
42 if (regnamelen != 2)
43 return;
44
45 switch (regname[0])
46 {
47 case 'S':
48 if (regname[1] != 'R')
49 return;
50 regno = PS_REGNUM;
51 break;
52 case 'P':
53 if (regname[1] != 'C')
54 return;
55 regno = PC_REGNUM;
56 break;
57 case 'D':
58 if (regname[1] < '0' || regname[1] > '7')
59 return;
60 regno = regname[1] - '0' + M68K_D0_REGNUM;
61 break;
62 case 'A':
63 if (regname[1] < '0' || regname[1] > '7')
64 return;
65 regno = regname[1] - '0' + M68K_A0_REGNUM;
66 break;
67 default:
68 return;
69 }
70
71 monitor_supply_register (regno, val);
72 }
73
74 /*
75 * This array of registers needs to match the indexes used by GDB. The
76 * whole reason this exists is because the various ROM monitors use
77 * different names than GDB does, and don't support all the
78 * registers either. So, typing "info reg sp" becomes an "A7".
79 */
80
81 static const char *
abug_regname(int index)82 abug_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 "PC",
89 };
90
91 if ((index >= (sizeof (regnames) / sizeof (regnames[0])))
92 || (index < 0) || (index >= NUM_REGS))
93 return NULL;
94 else
95 return regnames[index];
96 }
97
98 /*
99 * Define the monitor command strings. Since these are passed directly
100 * through to a printf style function, we need can include formatting
101 * strings. We also need a CR or LF on the end.
102 */
103
104 static struct target_ops abug_ops;
105
106 static char *abug_inits[] =
107 {"\r", NULL};
108
109 static struct monitor_ops abug_cmds;
110
111 static void
init_abug_cmds(void)112 init_abug_cmds (void)
113 {
114 abug_cmds.flags = MO_CLR_BREAK_USES_ADDR;
115 abug_cmds.init = abug_inits; /* Init strings */
116 abug_cmds.cont = "g\r"; /* continue command */
117 abug_cmds.step = "t\r"; /* single step */
118 abug_cmds.stop = NULL; /* interrupt command */
119 abug_cmds.set_break = "br %x\r"; /* set a breakpoint */
120 abug_cmds.clr_break = "nobr %x\r"; /* clear a breakpoint */
121 abug_cmds.clr_all_break = "nobr\r"; /* clear all breakpoints */
122 abug_cmds.fill = "bf %x:%x %x;b\r"; /* fill (start count val) */
123 abug_cmds.setmem.cmdb = "ms %x %02x\r"; /* setmem.cmdb (addr, value) */
124 abug_cmds.setmem.cmdw = "ms %x %04x\r"; /* setmem.cmdw (addr, value) */
125 abug_cmds.setmem.cmdl = "ms %x %08x\r"; /* setmem.cmdl (addr, value) */
126 abug_cmds.setmem.cmdll = NULL; /* setmem.cmdll (addr, value) */
127 abug_cmds.setmem.resp_delim = NULL; /* setreg.resp_delim */
128 abug_cmds.setmem.term = NULL; /* setreg.term */
129 abug_cmds.setmem.term_cmd = NULL; /* setreg.term_cmd */
130 abug_cmds.getmem.cmdb = "md %x:%x;b\r"; /* getmem.cmdb (addr, len) */
131 abug_cmds.getmem.cmdw = "md %x:%x;b\r"; /* getmem.cmdw (addr, len) */
132 abug_cmds.getmem.cmdl = "md %x:%x;b\r"; /* getmem.cmdl (addr, len) */
133 abug_cmds.getmem.cmdll = NULL; /* getmem.cmdll (addr, len) */
134 abug_cmds.getmem.resp_delim = " "; /* getmem.resp_delim */
135 abug_cmds.getmem.term = NULL; /* getmem.term */
136 abug_cmds.getmem.term_cmd = NULL; /* getmem.term_cmd */
137 abug_cmds.setreg.cmd = "rm %s %x\r"; /* setreg.cmd (name, value) */
138 abug_cmds.setreg.resp_delim = "="; /* setreg.resp_delim */
139 abug_cmds.setreg.term = "? "; /* setreg.term */
140 abug_cmds.setreg.term_cmd = ".\r"; /* setreg.term_cmd */
141 abug_cmds.getreg.cmd = "rm %s\r"; /* getreg.cmd (name) */
142 abug_cmds.getreg.resp_delim = "="; /* getreg.resp_delim */
143 abug_cmds.getreg.term = "? "; /* getreg.term */
144 abug_cmds.getreg.term_cmd = ".\r"; /* getreg.term_cmd */
145 abug_cmds.dump_registers = "rd\r"; /* dump_registers */
146 abug_cmds.register_pattern = "\\(\\w+\\) +=\\([0-9a-fA-F]+\\b\\)"; /* register_pattern */
147 abug_cmds.supply_register = abug_supply_register; /* supply_register */
148 abug_cmds.load_routine = NULL; /* load_routine (defaults to SRECs) */
149 abug_cmds.load = "lo 0\r"; /* download command */
150 abug_cmds.loadresp = "\n"; /* load response */
151 abug_cmds.prompt = "135Bug>"; /* monitor command prompt */
152 abug_cmds.line_term = "\r"; /* end-of-line terminator */
153 abug_cmds.cmd_end = NULL; /* optional command terminator */
154 abug_cmds.target = &abug_ops; /* target operations */
155 abug_cmds.stopbits = SERIAL_1_STOPBITS; /* number of stop bits */
156 abug_cmds.regnames = NULL; /* registers names */
157 abug_cmds.regname = abug_regname;
158 abug_cmds.magic = MONITOR_OPS_MAGIC; /* magic */
159 };
160
161 static void
abug_open(char * args,int from_tty)162 abug_open (char *args, int from_tty)
163 {
164 monitor_open (args, &abug_cmds, from_tty);
165 }
166
167 extern initialize_file_ftype _initialize_abug_rom; /* -Wmissing-prototypes */
168
169 void
_initialize_abug_rom(void)170 _initialize_abug_rom (void)
171 {
172 init_abug_cmds ();
173 init_monitor_ops (&abug_ops);
174
175 abug_ops.to_shortname = "abug";
176 abug_ops.to_longname = "ABug monitor";
177 abug_ops.to_doc = "Debug via the ABug monitor.\n\
178 Specify the serial device it is connected to (e.g. /dev/ttya).";
179 abug_ops.to_open = abug_open;
180
181 add_target (&abug_ops);
182 }
183