* ppc-bdm.c (#include <signal.h>): Removed.
[binutils-gdb.git] / gdb / ppc-bdm.c
1 /* Remote target communications for the Macraigor Systems BDM Wiggler
2 talking to a Motorola PPC 8xx ADS board
3 Copyright 1996, 1997, 2001 Free Software Foundation, Inc.
4
5 This file is part of GDB.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
21
22 #include "defs.h"
23 #include "gdbcore.h"
24 #include "gdb_string.h"
25 #include <fcntl.h>
26 #include "frame.h"
27 #include "inferior.h"
28 #include "bfd.h"
29 #include "symfile.h"
30 #include "target.h"
31 #include "gdbcmd.h"
32 #include "objfiles.h"
33 #include "gdb-stabs.h"
34 #include <sys/types.h>
35 #include "serial.h"
36 #include "ocd.h"
37 #include "ppc-tdep.h"
38
39 static void bdm_ppc_open (char *name, int from_tty);
40
41 static int bdm_ppc_wait (int pid, struct target_waitstatus *target_status);
42
43 static void bdm_ppc_fetch_registers (int regno);
44
45 static void bdm_ppc_store_registers (int regno);
46
47 extern struct target_ops bdm_ppc_ops; /* Forward decl */
48 \f
49 /*#define BDM_NUM_REGS 71 */
50 #define BDM_NUM_REGS 24
51
52 #define BDM_REGMAP \
53 2048, 2049, 2050, 2051, 2052, 2053, 2054, 2055, /* r0-r7 */ \
54 2056, 2057, 2058, 2059, 2060, 2061, 2062, 2063, /* r8-r15 */ \
55 2064, 2065, 2066, 2067, 2068, 2069, 2070, 2071, /* r16-r23 */ \
56 2072, 2073, 2074, 2075, 2076, 2077, 2078, 2079, /* r24-r31 */ \
57 \
58 2080, 2082, 2084, 2086, 2088, 2090, 2092, 2094, /* fp0->fp8 */ \
59 2096, 2098, 2100, 2102, 2104, 2106, 2108, 2110, /* fp0->fp8 */ \
60 2112, 2114, 2116, 2118, 2120, 2122, 2124, 2126, /* fp0->fp8 */ \
61 2128, 2130, 2132, 2134, 2136, 2138, 2140, 2142, /* fp0->fp8 */ \
62 \
63 26, /* pc (SRR0 (SPR 26)) */ \
64 2146, /* ps (MSR) */ \
65 2144, /* cnd (CR) */ \
66 8, /* lr (SPR 8) */ \
67 9, /* cnt (CTR (SPR 9)) */ \
68 1, /* xer (SPR 1) */ \
69 0, /* mq (SPR 0) */
70 \f
71
72 char nowatchdog[4] =
73 {0xff, 0xff, 0xff, 0x88};
74
75 /* Open a connection to a remote debugger.
76 NAME is the filename used for communication. */
77
78 static void
79 bdm_ppc_open (char *name, int from_tty)
80 {
81 CORE_ADDR watchdogaddr = 0xff000004;
82
83 ocd_open (name, from_tty, OCD_TARGET_MOTO_PPC, &bdm_ppc_ops);
84
85 /* We want interrupts to drop us into debugging mode. */
86 /* Modify the DER register to accomplish this. */
87 ocd_write_bdm_register (149, 0x20024000);
88
89 /* Disable watchdog timer on the board */
90 ocd_write_bytes (watchdogaddr, nowatchdog, 4);
91 }
92
93 /* Wait until the remote machine stops, then return,
94 storing status in STATUS just as `wait' would.
95 Returns "pid" (though it's not clear what, if anything, that
96 means in the case of this target). */
97
98 static int
99 bdm_ppc_wait (int pid, struct target_waitstatus *target_status)
100 {
101 int stop_reason;
102
103 target_status->kind = TARGET_WAITKIND_STOPPED;
104
105 stop_reason = ocd_wait ();
106
107 if (stop_reason)
108 {
109 target_status->value.sig = TARGET_SIGNAL_INT;
110 return inferior_pid;
111 }
112
113 target_status->value.sig = TARGET_SIGNAL_TRAP; /* XXX for now */
114
115 #if 0
116 {
117 unsigned long ecr, der;
118
119 ecr = ocd_read_bdm_register (148); /* Read the exception cause register */
120 der = ocd_read_bdm_register (149); /* Read the debug enables register */
121 fprintf_unfiltered (gdb_stdout, "ecr = 0x%x, der = 0x%x\n", ecr, der);
122 }
123 #endif
124
125 return inferior_pid;
126 }
127 \f
128 static int bdm_regmap[] =
129 {BDM_REGMAP};
130
131 /* Read the remote registers into regs.
132 Fetch register REGNO, or all registers if REGNO == -1
133
134 The Wiggler uses the following codes to access the registers:
135
136 0 -> 1023 SPR 0 -> 1023
137 0 - SPR 0 - MQ
138 1 - SPR 1 - XER
139 8 - SPR 8 - LR
140 9 - SPR 9 - CTR (known as cnt in GDB)
141 26 - SPR 26 - SRR0 - pc
142 1024 -> 2047 DCR 0 -> DCR 1023 (IBM PPC 4xx only)
143 2048 -> 2079 R0 -> R31
144 2080 -> 2143 FP0 -> FP31 (64 bit regs) (IBM PPC 5xx only)
145 2144 CR (known as cnd in GDB)
146 2145 FPCSR
147 2146 MSR (known as ps in GDB)
148 */
149
150 static void
151 bdm_ppc_fetch_registers (int regno)
152 {
153 int i;
154 unsigned char *regs, *beginregs, *endregs, *almostregs;
155 unsigned char midregs[32];
156 unsigned char mqreg[1];
157 int first_regno, last_regno;
158 int first_bdm_regno, last_bdm_regno;
159 int reglen, beginreglen, endreglen;
160
161 #if 1
162 for (i = 0; i < (FPLAST_REGNUM - FP0_REGNUM + 1); i++)
163 {
164 midregs[i] = -1;
165 }
166 mqreg[0] = -1;
167 #endif
168
169 if (regno == -1)
170 {
171 first_regno = 0;
172 last_regno = NUM_REGS - 1;
173
174 first_bdm_regno = 0;
175 last_bdm_regno = BDM_NUM_REGS - 1;
176 }
177 else
178 {
179 first_regno = regno;
180 last_regno = regno;
181
182 first_bdm_regno = bdm_regmap[regno];
183 last_bdm_regno = bdm_regmap[regno];
184 }
185
186 if (first_bdm_regno == -1)
187 {
188 supply_register (first_regno, NULL);
189 return; /* Unsupported register */
190 }
191
192 #if 1
193 /* Can't ask for floating point regs on ppc 8xx, also need to
194 avoid asking for the mq register. */
195 if (first_regno == last_regno) /* only want one reg */
196 {
197 /* printf("Asking for register %d\n", first_regno); */
198
199 /* if asking for an invalid register */
200 if ((first_regno == PPC_MQ_REGNUM) ||
201 ((first_regno >= FP0_REGNUM) && (first_regno <= FPLAST_REGNUM)))
202 {
203 /* printf("invalid reg request!\n"); */
204 supply_register (first_regno, NULL);
205 return; /* Unsupported register */
206 }
207 else
208 {
209 regs = ocd_read_bdm_registers (first_bdm_regno,
210 last_bdm_regno, &reglen);
211 }
212 }
213 else
214 /* want all regs */
215 {
216 /* printf("Asking for registers %d to %d\n", first_regno, last_regno); */
217 beginregs = ocd_read_bdm_registers (first_bdm_regno,
218 FP0_REGNUM - 1, &beginreglen);
219 endregs = (strcat (midregs,
220 ocd_read_bdm_registers (FPLAST_REGNUM + 1,
221 last_bdm_regno - 1, &endreglen)));
222 almostregs = (strcat (beginregs, endregs));
223 regs = (strcat (almostregs, mqreg));
224 reglen = beginreglen + 32 + endreglen + 1;
225 }
226
227 #endif
228 #if 0
229 regs = ocd_read_bdm_registers (first_bdm_regno, last_bdm_regno, &reglen);
230 #endif
231
232 for (i = first_regno; i <= last_regno; i++)
233 {
234 int bdm_regno, regoffset;
235
236 bdm_regno = bdm_regmap[i];
237 if (bdm_regno != -1)
238 {
239 regoffset = bdm_regno - first_bdm_regno;
240
241 if (regoffset >= reglen / 4)
242 continue;
243
244 supply_register (i, regs + 4 * regoffset);
245 }
246 else
247 supply_register (i, NULL); /* Unsupported register */
248 }
249 }
250
251 /* Store register REGNO, or all registers if REGNO == -1, from the contents
252 of REGISTERS. FIXME: ignores errors. */
253
254 static void
255 bdm_ppc_store_registers (int regno)
256 {
257 int i;
258 int first_regno, last_regno;
259 int first_bdm_regno, last_bdm_regno;
260
261 if (regno == -1)
262 {
263 first_regno = 0;
264 last_regno = NUM_REGS - 1;
265
266 first_bdm_regno = 0;
267 last_bdm_regno = BDM_NUM_REGS - 1;
268 }
269 else
270 {
271 first_regno = regno;
272 last_regno = regno;
273
274 first_bdm_regno = bdm_regmap[regno];
275 last_bdm_regno = bdm_regmap[regno];
276 }
277
278 if (first_bdm_regno == -1)
279 return; /* Unsupported register */
280
281 for (i = first_regno; i <= last_regno; i++)
282 {
283 int bdm_regno;
284
285 bdm_regno = bdm_regmap[i];
286
287 /* only attempt to write if it's a valid ppc 8xx register */
288 /* (need to avoid FP regs and MQ reg) */
289 if ((i != PPC_MQ_REGNUM) && ((i < FP0_REGNUM) || (i > FPLAST_REGNUM)))
290 {
291 /* printf("write valid reg %d\n", bdm_regno); */
292 ocd_write_bdm_registers (bdm_regno, registers + REGISTER_BYTE (i), 4);
293 }
294 /*
295 else if (i == PPC_MQ_REGNUM)
296 printf("don't write invalid reg %d (PPC_MQ_REGNUM)\n", bdm_regno);
297 else
298 printf("don't write invalid reg %d\n", bdm_regno);
299 */
300 }
301 }
302 \f
303 /* Define the target subroutine names */
304
305 struct target_ops bdm_ppc_ops;
306
307 static void
308 init_bdm_ppc_ops (void)
309 {
310 bdm_ppc_ops.to_shortname = "ocd";
311 bdm_ppc_ops.to_longname = "Remote target with On-Chip Debugging";
312 bdm_ppc_ops.to_doc = "Use a remote target with On-Chip Debugging. To use a target box;\n\
313 specify the serial device it is connected to (e.g. /dev/ttya). To use\n\
314 a wiggler, specify wiggler and then the port it is connected to\n\
315 (e.g. wiggler lpt1)."; /* to_doc */
316 bdm_ppc_ops.to_open = bdm_ppc_open;
317 bdm_ppc_ops.to_close = ocd_close;
318 bdm_ppc_ops.to_attach = NULL;
319 bdm_ppc_ops.to_post_attach = NULL;
320 bdm_ppc_ops.to_require_attach = NULL;
321 bdm_ppc_ops.to_detach = ocd_detach;
322 bdm_ppc_ops.to_require_detach = NULL;
323 bdm_ppc_ops.to_resume = ocd_resume;
324 bdm_ppc_ops.to_wait = bdm_ppc_wait;
325 bdm_ppc_ops.to_post_wait = NULL;
326 bdm_ppc_ops.to_fetch_registers = bdm_ppc_fetch_registers;
327 bdm_ppc_ops.to_store_registers = bdm_ppc_store_registers;
328 bdm_ppc_ops.to_prepare_to_store = ocd_prepare_to_store;
329 bdm_ppc_ops.to_xfer_memory = ocd_xfer_memory;
330 bdm_ppc_ops.to_files_info = ocd_files_info;
331 bdm_ppc_ops.to_insert_breakpoint = ocd_insert_breakpoint;
332 bdm_ppc_ops.to_remove_breakpoint = ocd_remove_breakpoint;
333 bdm_ppc_ops.to_terminal_init = NULL;
334 bdm_ppc_ops.to_terminal_inferior = NULL;
335 bdm_ppc_ops.to_terminal_ours_for_output = NULL;
336 bdm_ppc_ops.to_terminal_ours = NULL;
337 bdm_ppc_ops.to_terminal_info = NULL;
338 bdm_ppc_ops.to_kill = ocd_kill;
339 bdm_ppc_ops.to_load = ocd_load;
340 bdm_ppc_ops.to_lookup_symbol = NULL;
341 bdm_ppc_ops.to_create_inferior = ocd_create_inferior;
342 bdm_ppc_ops.to_post_startup_inferior = NULL;
343 bdm_ppc_ops.to_acknowledge_created_inferior = NULL;
344 bdm_ppc_ops.to_clone_and_follow_inferior = NULL;
345 bdm_ppc_ops.to_post_follow_inferior_by_clone = NULL;
346 bdm_ppc_ops.to_insert_fork_catchpoint = NULL;
347 bdm_ppc_ops.to_remove_fork_catchpoint = NULL;
348 bdm_ppc_ops.to_insert_vfork_catchpoint = NULL;
349 bdm_ppc_ops.to_remove_vfork_catchpoint = NULL;
350 bdm_ppc_ops.to_has_forked = NULL;
351 bdm_ppc_ops.to_has_vforked = NULL;
352 bdm_ppc_ops.to_can_follow_vfork_prior_to_exec = NULL;
353 bdm_ppc_ops.to_post_follow_vfork = NULL;
354 bdm_ppc_ops.to_insert_exec_catchpoint = NULL;
355 bdm_ppc_ops.to_remove_exec_catchpoint = NULL;
356 bdm_ppc_ops.to_has_execd = NULL;
357 bdm_ppc_ops.to_reported_exec_events_per_exec_call = NULL;
358 bdm_ppc_ops.to_has_exited = NULL;
359 bdm_ppc_ops.to_mourn_inferior = ocd_mourn;
360 bdm_ppc_ops.to_can_run = 0;
361 bdm_ppc_ops.to_notice_signals = 0;
362 bdm_ppc_ops.to_thread_alive = ocd_thread_alive;
363 bdm_ppc_ops.to_stop = ocd_stop;
364 bdm_ppc_ops.to_pid_to_exec_file = NULL;
365 bdm_ppc_ops.to_core_file_to_sym_file = NULL;
366 bdm_ppc_ops.to_stratum = process_stratum;
367 bdm_ppc_ops.DONT_USE = NULL;
368 bdm_ppc_ops.to_has_all_memory = 1;
369 bdm_ppc_ops.to_has_memory = 1;
370 bdm_ppc_ops.to_has_stack = 1;
371 bdm_ppc_ops.to_has_registers = 1;
372 bdm_ppc_ops.to_has_execution = 1;
373 bdm_ppc_ops.to_sections = NULL;
374 bdm_ppc_ops.to_sections_end = NULL;
375 bdm_ppc_ops.to_magic = OPS_MAGIC;
376 } /* init_bdm_ppc_ops */
377
378 void
379 _initialize_bdm_ppc (void)
380 {
381 init_bdm_ppc_ops ();
382 add_target (&bdm_ppc_ops);
383 }