Commit | Line | Data |
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33742334 | 1 | /* Remote debugging interface for MIPS remote debugging protocol. |
4887063b | 2 | Copyright 1993, 1994, 1995 Free Software Foundation, Inc. |
33742334 ILT |
3 | Contributed by Cygnus Support. Written by Ian Lance Taylor |
4 | <ian@cygnus.com>. | |
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 2 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, write to the Free Software | |
6c9638b4 | 20 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
33742334 ILT |
21 | |
22 | #include "defs.h" | |
23 | #include "inferior.h" | |
24 | #include "bfd.h" | |
77641260 | 25 | #include "symfile.h" |
33742334 ILT |
26 | #include "wait.h" |
27 | #include "gdbcmd.h" | |
28 | #include "gdbcore.h" | |
29 | #include "serial.h" | |
30 | #include "target.h" | |
66a48870 | 31 | #include "remote-utils.h" |
33742334 ILT |
32 | |
33 | #include <signal.h> | |
73d3dbd4 | 34 | #ifdef ANSI_PROTOTYPES |
85c613aa C |
35 | #include <stdarg.h> |
36 | #else | |
96e5f161 | 37 | #include <varargs.h> |
85c613aa | 38 | #endif |
ae55bdbc | 39 | |
ae55bdbc SS |
40 | extern void mips_set_processor_type_command PARAMS ((char *, int)); |
41 | ||
33742334 ILT |
42 | \f |
43 | /* Prototypes for local functions. */ | |
44 | ||
ae55bdbc | 45 | static int mips_readchar PARAMS ((int timeout)); |
33742334 | 46 | |
ae55bdbc SS |
47 | static int mips_receive_header PARAMS ((unsigned char *hdr, int *pgarbage, |
48 | int ch, int timeout)); | |
33742334 | 49 | |
ae55bdbc SS |
50 | static int mips_receive_trailer PARAMS ((unsigned char *trlr, int *pgarbage, |
51 | int *pch, int timeout)); | |
33742334 ILT |
52 | |
53 | static int mips_cksum PARAMS ((const unsigned char *hdr, | |
54 | const unsigned char *data, | |
55 | int len)); | |
56 | ||
ae55bdbc | 57 | static void mips_send_packet PARAMS ((const char *s, int get_ack)); |
33742334 | 58 | |
090d784a JSC |
59 | static void mips_send_command PARAMS ((const char *cmd, int prompt)); |
60 | ||
4c6071f7 JK |
61 | static int mips_receive_packet PARAMS ((char *buff, int throw_error, |
62 | int timeout)); | |
33742334 | 63 | |
cd10c7e3 SG |
64 | static int mips_request PARAMS ((int cmd, unsigned int addr, |
65 | unsigned int data, int *perr, int timeout, | |
66 | char *buff)); | |
33742334 | 67 | |
ae55bdbc | 68 | static void mips_initialize PARAMS ((void)); |
c2a0f1cb | 69 | |
ae55bdbc | 70 | static void mips_open PARAMS ((char *name, int from_tty)); |
33742334 | 71 | |
090d784a JSC |
72 | static void pmon_open PARAMS ((char *name, int from_tty)); |
73 | ||
ae55bdbc | 74 | static void mips_close PARAMS ((int quitting)); |
33742334 | 75 | |
ae55bdbc | 76 | static void mips_detach PARAMS ((char *args, int from_tty)); |
33742334 | 77 | |
67ac9759 JK |
78 | static void mips_resume PARAMS ((int pid, int step, |
79 | enum target_signal siggnal)); | |
33742334 | 80 | |
ae55bdbc | 81 | static int mips_wait PARAMS ((int pid, struct target_waitstatus *status)); |
33742334 | 82 | |
090d784a JSC |
83 | static int pmon_wait PARAMS ((int pid, struct target_waitstatus *status)); |
84 | ||
ae55bdbc | 85 | static int mips_map_regno PARAMS ((int regno)); |
33742334 | 86 | |
ae55bdbc | 87 | static void mips_fetch_registers PARAMS ((int regno)); |
33742334 | 88 | |
ae55bdbc | 89 | static void mips_prepare_to_store PARAMS ((void)); |
33742334 | 90 | |
ae55bdbc | 91 | static void mips_store_registers PARAMS ((int regno)); |
33742334 | 92 | |
ae55bdbc | 93 | static int mips_fetch_word PARAMS ((CORE_ADDR addr)); |
33742334 | 94 | |
ae55bdbc SS |
95 | static int mips_store_word PARAMS ((CORE_ADDR addr, int value, |
96 | char *old_contents)); | |
33742334 | 97 | |
ae55bdbc SS |
98 | static int mips_xfer_memory PARAMS ((CORE_ADDR memaddr, char *myaddr, int len, |
99 | int write, struct target_ops *ignore)); | |
33742334 | 100 | |
ae55bdbc | 101 | static void mips_files_info PARAMS ((struct target_ops *ignore)); |
33742334 | 102 | |
ae55bdbc SS |
103 | static void mips_create_inferior PARAMS ((char *execfile, char *args, |
104 | char **env)); | |
33742334 | 105 | |
ae55bdbc | 106 | static void mips_mourn_inferior PARAMS ((void)); |
33742334 | 107 | |
090d784a JSC |
108 | static int pmon_makeb64 PARAMS ((unsigned long v, char *p, int n, int *chksum)); |
109 | ||
110 | static int pmon_zeroset PARAMS ((int recsize, char **buff, int *amount, | |
111 | unsigned int *chksum)); | |
112 | ||
113 | static int pmon_checkset PARAMS ((int recsize, char **buff, int *value)); | |
114 | ||
115 | static void pmon_make_fastrec PARAMS ((char **outbuf, unsigned char *inbuf, | |
116 | int *inptr, int inamount, int *recsize, | |
117 | unsigned int *csum, unsigned int *zerofill)); | |
118 | ||
119 | static int pmon_check_ack PARAMS ((void)); | |
120 | ||
121 | static void pmon_load_fast PARAMS ((char *file)); | |
122 | ||
4704fd9c SG |
123 | static void mips_load PARAMS ((char *file, int from_tty)); |
124 | ||
cd10c7e3 | 125 | static int mips_make_srec PARAMS ((char *buffer, int type, CORE_ADDR memaddr, |
4704fd9c SG |
126 | unsigned char *myaddr, int len)); |
127 | ||
cd10c7e3 SG |
128 | static int common_breakpoint PARAMS ((int cmd, CORE_ADDR addr, CORE_ADDR mask, |
129 | char *flags)); | |
090d784a JSC |
130 | |
131 | static void common_open PARAMS ((struct target_ops *ops, char *name, | |
132 | int from_tty)); | |
133 | /* Forward declarations. */ | |
33742334 | 134 | extern struct target_ops mips_ops; |
090d784a | 135 | extern struct target_ops pmon_ops; |
33742334 ILT |
136 | \f |
137 | /* The MIPS remote debugging interface is built on top of a simple | |
138 | packet protocol. Each packet is organized as follows: | |
139 | ||
140 | SYN The first character is always a SYN (ASCII 026, or ^V). SYN | |
141 | may not appear anywhere else in the packet. Any time a SYN is | |
142 | seen, a new packet should be assumed to have begun. | |
143 | ||
144 | TYPE_LEN | |
145 | This byte contains the upper five bits of the logical length | |
146 | of the data section, plus a single bit indicating whether this | |
147 | is a data packet or an acknowledgement. The documentation | |
148 | indicates that this bit is 1 for a data packet, but the actual | |
149 | board uses 1 for an acknowledgement. The value of the byte is | |
150 | 0x40 + (ack ? 0x20 : 0) + (len >> 6) | |
151 | (we always have 0 <= len < 1024). Acknowledgement packets do | |
152 | not carry data, and must have a data length of 0. | |
153 | ||
154 | LEN1 This byte contains the lower six bits of the logical length of | |
155 | the data section. The value is | |
156 | 0x40 + (len & 0x3f) | |
157 | ||
158 | SEQ This byte contains the six bit sequence number of the packet. | |
159 | The value is | |
160 | 0x40 + seq | |
161 | An acknowlegment packet contains the sequence number of the | |
4887063b | 162 | packet being acknowledged plus 1 modulo 64. Data packets are |
33742334 ILT |
163 | transmitted in sequence. There may only be one outstanding |
164 | unacknowledged data packet at a time. The sequence numbers | |
165 | are independent in each direction. If an acknowledgement for | |
166 | the previous packet is received (i.e., an acknowledgement with | |
167 | the sequence number of the packet just sent) the packet just | |
168 | sent should be retransmitted. If no acknowledgement is | |
169 | received within a timeout period, the packet should be | |
170 | retransmitted. This has an unfortunate failure condition on a | |
171 | high-latency line, as a delayed acknowledgement may lead to an | |
172 | endless series of duplicate packets. | |
173 | ||
174 | DATA The actual data bytes follow. The following characters are | |
175 | escaped inline with DLE (ASCII 020, or ^P): | |
176 | SYN (026) DLE S | |
177 | DLE (020) DLE D | |
178 | ^C (003) DLE C | |
179 | ^S (023) DLE s | |
180 | ^Q (021) DLE q | |
181 | The additional DLE characters are not counted in the logical | |
182 | length stored in the TYPE_LEN and LEN1 bytes. | |
183 | ||
184 | CSUM1 | |
185 | CSUM2 | |
186 | CSUM3 | |
187 | These bytes contain an 18 bit checksum of the complete | |
188 | contents of the packet excluding the SEQ byte and the | |
189 | CSUM[123] bytes. The checksum is simply the twos complement | |
190 | addition of all the bytes treated as unsigned characters. The | |
191 | values of the checksum bytes are: | |
192 | CSUM1: 0x40 + ((cksum >> 12) & 0x3f) | |
193 | CSUM2: 0x40 + ((cksum >> 6) & 0x3f) | |
194 | CSUM3: 0x40 + (cksum & 0x3f) | |
195 | ||
196 | It happens that the MIPS remote debugging protocol always | |
197 | communicates with ASCII strings. Because of this, this | |
198 | implementation doesn't bother to handle the DLE quoting mechanism, | |
199 | since it will never be required. */ | |
200 | ||
201 | /* The SYN character which starts each packet. */ | |
202 | #define SYN '\026' | |
203 | ||
204 | /* The 0x40 used to offset each packet (this value ensures that all of | |
205 | the header and trailer bytes, other than SYN, are printable ASCII | |
206 | characters). */ | |
207 | #define HDR_OFFSET 0x40 | |
208 | ||
209 | /* The indices of the bytes in the packet header. */ | |
210 | #define HDR_INDX_SYN 0 | |
211 | #define HDR_INDX_TYPE_LEN 1 | |
212 | #define HDR_INDX_LEN1 2 | |
213 | #define HDR_INDX_SEQ 3 | |
214 | #define HDR_LENGTH 4 | |
215 | ||
216 | /* The data/ack bit in the TYPE_LEN header byte. */ | |
217 | #define TYPE_LEN_DA_BIT 0x20 | |
218 | #define TYPE_LEN_DATA 0 | |
219 | #define TYPE_LEN_ACK TYPE_LEN_DA_BIT | |
220 | ||
221 | /* How to compute the header bytes. */ | |
222 | #define HDR_SET_SYN(data, len, seq) (SYN) | |
223 | #define HDR_SET_TYPE_LEN(data, len, seq) \ | |
224 | (HDR_OFFSET \ | |
225 | + ((data) ? TYPE_LEN_DATA : TYPE_LEN_ACK) \ | |
226 | + (((len) >> 6) & 0x1f)) | |
227 | #define HDR_SET_LEN1(data, len, seq) (HDR_OFFSET + ((len) & 0x3f)) | |
228 | #define HDR_SET_SEQ(data, len, seq) (HDR_OFFSET + (seq)) | |
229 | ||
230 | /* Check that a header byte is reasonable. */ | |
231 | #define HDR_CHECK(ch) (((ch) & HDR_OFFSET) == HDR_OFFSET) | |
232 | ||
233 | /* Get data from the header. These macros evaluate their argument | |
234 | multiple times. */ | |
235 | #define HDR_IS_DATA(hdr) \ | |
236 | (((hdr)[HDR_INDX_TYPE_LEN] & TYPE_LEN_DA_BIT) == TYPE_LEN_DATA) | |
237 | #define HDR_GET_LEN(hdr) \ | |
238 | ((((hdr)[HDR_INDX_TYPE_LEN] & 0x1f) << 6) + (((hdr)[HDR_INDX_LEN1] & 0x3f))) | |
239 | #define HDR_GET_SEQ(hdr) ((hdr)[HDR_INDX_SEQ] & 0x3f) | |
240 | ||
241 | /* The maximum data length. */ | |
242 | #define DATA_MAXLEN 1023 | |
243 | ||
244 | /* The trailer offset. */ | |
245 | #define TRLR_OFFSET HDR_OFFSET | |
246 | ||
247 | /* The indices of the bytes in the packet trailer. */ | |
248 | #define TRLR_INDX_CSUM1 0 | |
249 | #define TRLR_INDX_CSUM2 1 | |
250 | #define TRLR_INDX_CSUM3 2 | |
251 | #define TRLR_LENGTH 3 | |
252 | ||
253 | /* How to compute the trailer bytes. */ | |
254 | #define TRLR_SET_CSUM1(cksum) (TRLR_OFFSET + (((cksum) >> 12) & 0x3f)) | |
255 | #define TRLR_SET_CSUM2(cksum) (TRLR_OFFSET + (((cksum) >> 6) & 0x3f)) | |
256 | #define TRLR_SET_CSUM3(cksum) (TRLR_OFFSET + (((cksum) ) & 0x3f)) | |
257 | ||
258 | /* Check that a trailer byte is reasonable. */ | |
259 | #define TRLR_CHECK(ch) (((ch) & TRLR_OFFSET) == TRLR_OFFSET) | |
260 | ||
261 | /* Get data from the trailer. This evaluates its argument multiple | |
262 | times. */ | |
263 | #define TRLR_GET_CKSUM(trlr) \ | |
264 | ((((trlr)[TRLR_INDX_CSUM1] & 0x3f) << 12) \ | |
265 | + (((trlr)[TRLR_INDX_CSUM2] & 0x3f) << 6) \ | |
266 | + ((trlr)[TRLR_INDX_CSUM3] & 0x3f)) | |
267 | ||
268 | /* The sequence number modulos. */ | |
269 | #define SEQ_MODULOS (64) | |
270 | ||
090d784a JSC |
271 | enum mips_monitor_type { |
272 | /* IDT/SIM monitor being used: */ | |
273 | MON_IDT, | |
274 | /* PMON monitor being used: */ | |
275 | MON_PMON, | |
276 | /* Last and unused value, for sizing vectors, etc. */ | |
277 | MON_LAST | |
278 | }; | |
279 | static enum mips_monitor_type mips_monitor = MON_LAST; | |
280 | ||
281 | /* The default monitor prompt text: */ | |
282 | static char *mips_monitor_prompt = TARGET_MONITOR_PROMPT; | |
283 | /* For the Cogent PMON world this is still not ideal. The default | |
284 | prompt is "PMON> ", unfortunately the user can change the prompt | |
285 | and the new prompt will survive over a power-cycle (EEPROM). This | |
286 | means that the code should really force the monitor prompt to a | |
287 | known value as the very first action, and that the | |
288 | "mips_monitor_prompt" support is not needed... since the prompt | |
289 | could be explicitly set to TARGET_MONITOR_PROMPT (even though it | |
290 | may be the prompt for a different monitor). However, this will | |
291 | require changing the mips_initialize reset sequence. (TODO) */ | |
292 | ||
33742334 ILT |
293 | /* Set to 1 if the target is open. */ |
294 | static int mips_is_open; | |
295 | ||
090d784a JSC |
296 | /* Currently active target description (if mips_is_open == 1) */ |
297 | static struct target_ops *current_ops; | |
298 | ||
c2a0f1cb ILT |
299 | /* Set to 1 while the connection is being initialized. */ |
300 | static int mips_initializing; | |
301 | ||
33742334 | 302 | /* The next sequence number to send. */ |
090d784a | 303 | static unsigned int mips_send_seq; |
33742334 ILT |
304 | |
305 | /* The next sequence number we expect to receive. */ | |
090d784a | 306 | static unsigned int mips_receive_seq; |
33742334 ILT |
307 | |
308 | /* The time to wait before retransmitting a packet, in seconds. */ | |
309 | static int mips_retransmit_wait = 3; | |
310 | ||
311 | /* The number of times to try retransmitting a packet before giving up. */ | |
312 | static int mips_send_retries = 10; | |
313 | ||
314 | /* The number of garbage characters to accept when looking for an | |
315 | SYN for the next packet. */ | |
316 | static int mips_syn_garbage = 1050; | |
317 | ||
318 | /* The time to wait for a packet, in seconds. */ | |
c2a0f1cb | 319 | static int mips_receive_wait = 5; |
33742334 ILT |
320 | |
321 | /* Set if we have sent a packet to the board but have not yet received | |
322 | a reply. */ | |
323 | static int mips_need_reply = 0; | |
324 | ||
1724c671 SG |
325 | /* Handle used to access serial I/O stream. */ |
326 | static serial_t mips_desc; | |
327 | ||
cd10c7e3 SG |
328 | /* Counts the number of times the user tried to interrupt the target (usually |
329 | via ^C. */ | |
330 | static int interrupt_count; | |
331 | ||
332 | /* If non-zero, means that the target is running. */ | |
333 | static int mips_wait_flag = 0; | |
334 | ||
335 | /* If non-zero, monitor supports breakpoint commands. */ | |
336 | static monitor_supports_breakpoints = 0; | |
337 | ||
338 | /* Data cache header. */ | |
339 | ||
340 | static DCACHE *mips_dcache; | |
341 | ||
342 | /* Non-zero means that we've just hit a read or write watchpoint */ | |
343 | static int hit_watchpoint; | |
344 | ||
4fb192be JK |
345 | /* Handle low-level error that we can't recover from. Note that just |
346 | error()ing out from target_wait or some such low-level place will cause | |
347 | all hell to break loose--the rest of GDB will tend to get left in an | |
348 | inconsistent state. */ | |
349 | ||
2b9fbee4 | 350 | static NORETURN void |
73d3dbd4 | 351 | #ifdef ANSI_PROTOTYPES |
85c613aa C |
352 | mips_error (char *string, ...) |
353 | #else | |
4fb192be JK |
354 | mips_error (va_alist) |
355 | va_dcl | |
85c613aa | 356 | #endif |
4fb192be JK |
357 | { |
358 | va_list args; | |
4fb192be | 359 | |
73d3dbd4 | 360 | #ifdef ANSI_PROTOTYPES |
85c613aa C |
361 | va_start (args, string); |
362 | #else | |
363 | char *string; | |
4fb192be | 364 | va_start (args); |
85c613aa C |
365 | string = va_arg (args, char *); |
366 | #endif | |
367 | ||
4fb192be JK |
368 | target_terminal_ours (); |
369 | wrap_here(""); /* Force out any buffered output */ | |
370 | gdb_flush (gdb_stdout); | |
371 | if (error_pre_print) | |
372 | fprintf_filtered (gdb_stderr, error_pre_print); | |
4fb192be JK |
373 | vfprintf_filtered (gdb_stderr, string, args); |
374 | fprintf_filtered (gdb_stderr, "\n"); | |
375 | va_end (args); | |
cd10c7e3 | 376 | gdb_flush (gdb_stderr); |
4fb192be | 377 | |
96e5f161 JK |
378 | /* Clean up in such a way that mips_close won't try to talk to the |
379 | board (it almost surely won't work since we weren't able to talk to | |
380 | it). */ | |
381 | mips_is_open = 0; | |
382 | SERIAL_CLOSE (mips_desc); | |
383 | ||
384 | printf_unfiltered ("Ending remote MIPS debugging.\n"); | |
4fb192be JK |
385 | target_mourn_inferior (); |
386 | ||
387 | return_to_top_level (RETURN_ERROR); | |
388 | } | |
389 | ||
cd10c7e3 SG |
390 | /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if |
391 | timed out. */ | |
392 | ||
4704fd9c SG |
393 | int |
394 | mips_expect (string) | |
395 | char *string; | |
396 | { | |
397 | char *p = string; | |
4704fd9c SG |
398 | |
399 | immediate_quit = 1; | |
400 | while (1) | |
401 | { | |
090d784a | 402 | int c; |
4704fd9c SG |
403 | |
404 | /* Must use SERIAL_READCHAR here cuz mips_readchar would get confused if we | |
090d784a | 405 | were waiting for the mips_monitor_prompt... */ |
4704fd9c SG |
406 | |
407 | c = SERIAL_READCHAR (mips_desc, 2); | |
408 | ||
409 | if (c == SERIAL_TIMEOUT) | |
410 | return 0; | |
411 | ||
412 | if (c == *p++) | |
413 | { | |
414 | if (*p == '\0') | |
415 | { | |
416 | immediate_quit = 0; | |
4704fd9c SG |
417 | return 1; |
418 | } | |
419 | } | |
420 | else | |
421 | { | |
422 | p = string; | |
423 | if (c == *p) | |
424 | p++; | |
425 | } | |
426 | } | |
427 | } | |
428 | ||
090d784a JSC |
429 | /* Read the required number of characters into the given buffer (which |
430 | is assumed to be large enough). The only failure is a timeout. */ | |
431 | int | |
432 | mips_getstring (string, n) | |
433 | char *string; | |
434 | int n; | |
435 | { | |
436 | char *p = string; | |
437 | int c; | |
438 | ||
439 | immediate_quit = 1; | |
440 | while (n > 0) | |
441 | { | |
442 | c = SERIAL_READCHAR (mips_desc, 2); | |
443 | ||
444 | if (c == SERIAL_TIMEOUT) { | |
445 | fprintf_unfiltered (stderr, "Failed to read %d characters from target (TIMEOUT)\n", n); | |
446 | return 0; | |
447 | } | |
448 | ||
449 | *p++ = c; | |
450 | n--; | |
451 | } | |
452 | ||
453 | return 1; | |
454 | } | |
455 | ||
9a9a88c1 ILT |
456 | /* Read a character from the remote, aborting on error. Returns |
457 | SERIAL_TIMEOUT on timeout (since that's what SERIAL_READCHAR | |
090d784a | 458 | returns). FIXME: If we see the string mips_monitor_prompt from |
0e3a4b1e JSC |
459 | the board, then we are debugging on the main console port, and we |
460 | have somehow dropped out of remote debugging mode. In this case, | |
461 | we automatically go back in to remote debugging mode. This is a | |
462 | hack, put in because I can't find any way for a program running on | |
463 | the remote board to terminate without also ending remote debugging | |
9a9a88c1 ILT |
464 | mode. I assume users won't have any trouble with this; for one |
465 | thing, the IDT documentation generally assumes that the remote | |
466 | debugging port is not the console port. This is, however, very | |
467 | convenient for DejaGnu when you only have one connected serial | |
468 | port. */ | |
33742334 ILT |
469 | |
470 | static int | |
471 | mips_readchar (timeout) | |
472 | int timeout; | |
473 | { | |
474 | int ch; | |
c2a0f1cb | 475 | static int state = 0; |
090d784a JSC |
476 | static int mips_monitor_prompt_len = -1; |
477 | ||
478 | /* NASTY, since we assume that the prompt does not change after the | |
479 | first mips_readchar call: */ | |
480 | if (mips_monitor_prompt_len = -1) | |
481 | mips_monitor_prompt_len = strlen(mips_monitor_prompt); | |
482 | ||
4887063b | 483 | #ifdef MAINTENANCE_CMDS |
090d784a JSC |
484 | { |
485 | int i; | |
4887063b | 486 | |
090d784a JSC |
487 | i = timeout; |
488 | if (i == -1 && watchdog > 0) | |
489 | i = watchdog; | |
490 | } | |
4887063b | 491 | #endif |
33742334 | 492 | |
090d784a | 493 | if (state == mips_monitor_prompt_len) |
b0a0ee52 | 494 | timeout = 1; |
1724c671 | 495 | ch = SERIAL_READCHAR (mips_desc, timeout); |
4887063b SG |
496 | #ifdef MAINTENANCE_CMDS |
497 | if (ch == SERIAL_TIMEOUT && timeout == -1) /* Watchdog went off */ | |
498 | { | |
499 | target_mourn_inferior (); | |
500 | error ("Watchdog has expired. Target detached.\n"); | |
501 | } | |
502 | #endif | |
1724c671 | 503 | if (ch == SERIAL_EOF) |
4fb192be | 504 | mips_error ("End of file from remote"); |
1724c671 | 505 | if (ch == SERIAL_ERROR) |
4fb192be | 506 | mips_error ("Error reading from remote: %s", safe_strerror (errno)); |
cd10c7e3 | 507 | if (remote_debug > 1) |
33742334 | 508 | { |
47d52968 JK |
509 | /* Don't use _filtered; we can't deal with a QUIT out of |
510 | target_wait, and I think this might be called from there. */ | |
1724c671 | 511 | if (ch != SERIAL_TIMEOUT) |
47d52968 | 512 | printf_unfiltered ("Read '%c' %d 0x%x\n", ch, ch, ch); |
33742334 | 513 | else |
47d52968 | 514 | printf_unfiltered ("Timed out in read\n"); |
33742334 | 515 | } |
c2a0f1cb | 516 | |
090d784a | 517 | /* If we have seen mips_monitor_prompt and we either time out, or |
0e3a4b1e JSC |
518 | we see a @ (which was echoed from a packet we sent), reset the |
519 | board as described above. The first character in a packet after | |
520 | the SYN (which is not echoed) is always an @ unless the packet is | |
521 | more than 64 characters long, which ours never are. */ | |
1724c671 | 522 | if ((ch == SERIAL_TIMEOUT || ch == '@') |
090d784a | 523 | && state == mips_monitor_prompt_len |
c2a0f1cb ILT |
524 | && ! mips_initializing) |
525 | { | |
cd10c7e3 | 526 | if (remote_debug > 0) |
47d52968 JK |
527 | /* Don't use _filtered; we can't deal with a QUIT out of |
528 | target_wait, and I think this might be called from there. */ | |
529 | printf_unfiltered ("Reinitializing MIPS debugging mode\n"); | |
c2a0f1cb ILT |
530 | |
531 | mips_need_reply = 0; | |
532 | mips_initialize (); | |
533 | ||
534 | state = 0; | |
535 | ||
4887063b SG |
536 | /* At this point, about the only thing we can do is abort the command |
537 | in progress and get back to command level as quickly as possible. */ | |
538 | ||
539 | error ("Remote board reset, debug protocol re-initialized."); | |
c2a0f1cb ILT |
540 | } |
541 | ||
090d784a | 542 | if (ch == mips_monitor_prompt[state]) |
c2a0f1cb ILT |
543 | ++state; |
544 | else | |
545 | state = 0; | |
546 | ||
33742334 ILT |
547 | return ch; |
548 | } | |
549 | ||
550 | /* Get a packet header, putting the data in the supplied buffer. | |
551 | PGARBAGE is a pointer to the number of garbage characters received | |
552 | so far. CH is the last character received. Returns 0 for success, | |
553 | or -1 for timeout. */ | |
554 | ||
555 | static int | |
556 | mips_receive_header (hdr, pgarbage, ch, timeout) | |
557 | unsigned char *hdr; | |
558 | int *pgarbage; | |
559 | int ch; | |
560 | int timeout; | |
561 | { | |
562 | int i; | |
563 | ||
564 | while (1) | |
565 | { | |
566 | /* Wait for a SYN. mips_syn_garbage is intended to prevent | |
567 | sitting here indefinitely if the board sends us one garbage | |
568 | character per second. ch may already have a value from the | |
569 | last time through the loop. */ | |
570 | while (ch != SYN) | |
571 | { | |
572 | ch = mips_readchar (timeout); | |
9a9a88c1 | 573 | if (ch == SERIAL_TIMEOUT) |
090d784a | 574 | return -1; |
33742334 ILT |
575 | if (ch != SYN) |
576 | { | |
577 | /* Printing the character here lets the user of gdb see | |
578 | what the program is outputting, if the debugging is | |
47d52968 JK |
579 | being done on the console port. Don't use _filtered; |
580 | we can't deal with a QUIT out of target_wait. */ | |
cd10c7e3 | 581 | if (! mips_initializing || remote_debug > 0) |
c2a0f1cb | 582 | { |
1f233758 SS |
583 | /* Note that the host's idea of newline may not |
584 | correspond to the target's idea, so recognize | |
585 | newline by its actual ASCII code, but write it | |
586 | out using the \n notation. */ | |
587 | if (ch < 0x20 && ch != '\012') | |
7d13174e SS |
588 | { |
589 | putchar_unfiltered ('^'); | |
590 | putchar_unfiltered (ch + 0x40); | |
591 | } | |
1f233758 SS |
592 | else if (ch == '\012') |
593 | putchar_unfiltered ('\n'); | |
7d13174e SS |
594 | else |
595 | putchar_unfiltered (ch); | |
199b2450 | 596 | gdb_flush (gdb_stdout); |
c2a0f1cb | 597 | } |
33742334 ILT |
598 | |
599 | ++*pgarbage; | |
4c5bc9f4 SG |
600 | if (mips_syn_garbage > 0 |
601 | && *pgarbage > mips_syn_garbage) | |
cd10c7e3 SG |
602 | mips_error ("Debug protocol failure: more than %d characters before a sync.", |
603 | mips_syn_garbage); | |
33742334 ILT |
604 | } |
605 | } | |
606 | ||
607 | /* Get the packet header following the SYN. */ | |
608 | for (i = 1; i < HDR_LENGTH; i++) | |
609 | { | |
610 | ch = mips_readchar (timeout); | |
9a9a88c1 | 611 | if (ch == SERIAL_TIMEOUT) |
090d784a | 612 | return -1; |
33742334 ILT |
613 | /* Make sure this is a header byte. */ |
614 | if (ch == SYN || ! HDR_CHECK (ch)) | |
615 | break; | |
616 | ||
617 | hdr[i] = ch; | |
618 | } | |
619 | ||
620 | /* If we got the complete header, we can return. Otherwise we | |
621 | loop around and keep looking for SYN. */ | |
622 | if (i >= HDR_LENGTH) | |
090d784a | 623 | return 0; |
33742334 ILT |
624 | } |
625 | } | |
626 | ||
627 | /* Get a packet header, putting the data in the supplied buffer. | |
628 | PGARBAGE is a pointer to the number of garbage characters received | |
629 | so far. The last character read is returned in *PCH. Returns 0 | |
630 | for success, -1 for timeout, -2 for error. */ | |
631 | ||
632 | static int | |
633 | mips_receive_trailer (trlr, pgarbage, pch, timeout) | |
634 | unsigned char *trlr; | |
635 | int *pgarbage; | |
636 | int *pch; | |
637 | int timeout; | |
638 | { | |
639 | int i; | |
640 | int ch; | |
641 | ||
642 | for (i = 0; i < TRLR_LENGTH; i++) | |
643 | { | |
644 | ch = mips_readchar (timeout); | |
645 | *pch = ch; | |
9a9a88c1 | 646 | if (ch == SERIAL_TIMEOUT) |
33742334 ILT |
647 | return -1; |
648 | if (! TRLR_CHECK (ch)) | |
649 | return -2; | |
650 | trlr[i] = ch; | |
651 | } | |
652 | return 0; | |
653 | } | |
654 | ||
655 | /* Get the checksum of a packet. HDR points to the packet header. | |
656 | DATA points to the packet data. LEN is the length of DATA. */ | |
657 | ||
658 | static int | |
659 | mips_cksum (hdr, data, len) | |
660 | const unsigned char *hdr; | |
661 | const unsigned char *data; | |
662 | int len; | |
663 | { | |
664 | register const unsigned char *p; | |
665 | register int c; | |
666 | register int cksum; | |
667 | ||
668 | cksum = 0; | |
669 | ||
670 | /* The initial SYN is not included in the checksum. */ | |
671 | c = HDR_LENGTH - 1; | |
672 | p = hdr + 1; | |
673 | while (c-- != 0) | |
674 | cksum += *p++; | |
675 | ||
676 | c = len; | |
677 | p = data; | |
678 | while (c-- != 0) | |
679 | cksum += *p++; | |
680 | ||
681 | return cksum; | |
682 | } | |
683 | ||
684 | /* Send a packet containing the given ASCII string. */ | |
685 | ||
686 | static void | |
c2a0f1cb | 687 | mips_send_packet (s, get_ack) |
33742334 | 688 | const char *s; |
c2a0f1cb | 689 | int get_ack; |
33742334 ILT |
690 | { |
691 | unsigned int len; | |
692 | unsigned char *packet; | |
693 | register int cksum; | |
694 | int try; | |
695 | ||
696 | len = strlen (s); | |
697 | if (len > DATA_MAXLEN) | |
4fb192be | 698 | mips_error ("MIPS protocol data packet too long: %s", s); |
33742334 ILT |
699 | |
700 | packet = (unsigned char *) alloca (HDR_LENGTH + len + TRLR_LENGTH + 1); | |
701 | ||
702 | packet[HDR_INDX_SYN] = HDR_SET_SYN (1, len, mips_send_seq); | |
703 | packet[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (1, len, mips_send_seq); | |
704 | packet[HDR_INDX_LEN1] = HDR_SET_LEN1 (1, len, mips_send_seq); | |
705 | packet[HDR_INDX_SEQ] = HDR_SET_SEQ (1, len, mips_send_seq); | |
706 | ||
707 | memcpy (packet + HDR_LENGTH, s, len); | |
708 | ||
709 | cksum = mips_cksum (packet, packet + HDR_LENGTH, len); | |
710 | packet[HDR_LENGTH + len + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum); | |
711 | packet[HDR_LENGTH + len + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum); | |
712 | packet[HDR_LENGTH + len + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum); | |
713 | ||
714 | /* Increment the sequence number. This will set mips_send_seq to | |
715 | the sequence number we expect in the acknowledgement. */ | |
716 | mips_send_seq = (mips_send_seq + 1) % SEQ_MODULOS; | |
717 | ||
718 | /* We can only have one outstanding data packet, so we just wait for | |
719 | the acknowledgement here. Keep retransmitting the packet until | |
720 | we get one, or until we've tried too many times. */ | |
721 | for (try = 0; try < mips_send_retries; try++) | |
722 | { | |
723 | int garbage; | |
724 | int ch; | |
725 | ||
cd10c7e3 | 726 | if (remote_debug > 0) |
33742334 | 727 | { |
47d52968 JK |
728 | /* Don't use _filtered; we can't deal with a QUIT out of |
729 | target_wait, and I think this might be called from there. */ | |
33742334 | 730 | packet[HDR_LENGTH + len + TRLR_LENGTH] = '\0'; |
47d52968 | 731 | printf_unfiltered ("Writing \"%s\"\n", packet + 1); |
33742334 ILT |
732 | } |
733 | ||
9a9a88c1 ILT |
734 | if (SERIAL_WRITE (mips_desc, packet, |
735 | HDR_LENGTH + len + TRLR_LENGTH) != 0) | |
4fb192be | 736 | mips_error ("write to target failed: %s", safe_strerror (errno)); |
33742334 | 737 | |
4704fd9c SG |
738 | if (! get_ack) |
739 | return; | |
740 | ||
33742334 ILT |
741 | garbage = 0; |
742 | ch = 0; | |
743 | while (1) | |
744 | { | |
745 | unsigned char hdr[HDR_LENGTH + 1]; | |
746 | unsigned char trlr[TRLR_LENGTH + 1]; | |
747 | int err; | |
748 | int seq; | |
749 | ||
750 | /* Get the packet header. If we time out, resend the data | |
751 | packet. */ | |
752 | err = mips_receive_header (hdr, &garbage, ch, mips_retransmit_wait); | |
753 | if (err != 0) | |
754 | break; | |
755 | ||
756 | ch = 0; | |
757 | ||
758 | /* If we get a data packet, assume it is a duplicate and | |
759 | ignore it. FIXME: If the acknowledgement is lost, this | |
760 | data packet may be the packet the remote sends after the | |
761 | acknowledgement. */ | |
090d784a JSC |
762 | if (HDR_IS_DATA (hdr)) { |
763 | int i; | |
764 | ||
765 | /* Ignore any errors raised whilst attempting to ignore | |
766 | packet. */ | |
767 | ||
768 | len = HDR_GET_LEN (hdr); | |
769 | ||
770 | for (i = 0; i < len; i++) | |
771 | { | |
772 | int rch; | |
773 | ||
774 | rch = mips_readchar (2); | |
775 | if (rch == SYN) | |
776 | { | |
777 | ch = SYN; | |
778 | break; | |
779 | } | |
780 | if (rch == SERIAL_TIMEOUT) | |
781 | break; | |
782 | /* ignore the character */ | |
783 | } | |
784 | ||
785 | if (i == len) | |
786 | (void) mips_receive_trailer (trlr, &garbage, &ch, 2); | |
787 | ||
788 | /* We don't bother checking the checksum, or providing an | |
789 | ACK to the packet. */ | |
33742334 | 790 | continue; |
090d784a | 791 | } |
33742334 ILT |
792 | |
793 | /* If the length is not 0, this is a garbled packet. */ | |
794 | if (HDR_GET_LEN (hdr) != 0) | |
795 | continue; | |
796 | ||
797 | /* Get the packet trailer. */ | |
798 | err = mips_receive_trailer (trlr, &garbage, &ch, | |
799 | mips_retransmit_wait); | |
800 | ||
801 | /* If we timed out, resend the data packet. */ | |
802 | if (err == -1) | |
803 | break; | |
804 | ||
805 | /* If we got a bad character, reread the header. */ | |
806 | if (err != 0) | |
807 | continue; | |
808 | ||
809 | /* If the checksum does not match the trailer checksum, this | |
810 | is a bad packet; ignore it. */ | |
811 | if (mips_cksum (hdr, (unsigned char *) NULL, 0) | |
812 | != TRLR_GET_CKSUM (trlr)) | |
813 | continue; | |
814 | ||
cd10c7e3 | 815 | if (remote_debug > 0) |
33742334 ILT |
816 | { |
817 | hdr[HDR_LENGTH] = '\0'; | |
818 | trlr[TRLR_LENGTH] = '\0'; | |
47d52968 JK |
819 | /* Don't use _filtered; we can't deal with a QUIT out of |
820 | target_wait, and I think this might be called from there. */ | |
821 | printf_unfiltered ("Got ack %d \"%s%s\"\n", | |
f63f30e2 | 822 | HDR_GET_SEQ (hdr), hdr + 1, trlr); |
33742334 ILT |
823 | } |
824 | ||
825 | /* If this ack is for the current packet, we're done. */ | |
826 | seq = HDR_GET_SEQ (hdr); | |
827 | if (seq == mips_send_seq) | |
828 | return; | |
829 | ||
830 | /* If this ack is for the last packet, resend the current | |
831 | packet. */ | |
832 | if ((seq + 1) % SEQ_MODULOS == mips_send_seq) | |
833 | break; | |
834 | ||
835 | /* Otherwise this is a bad ack; ignore it. Increment the | |
836 | garbage count to ensure that we do not stay in this loop | |
837 | forever. */ | |
838 | ++garbage; | |
839 | } | |
840 | } | |
841 | ||
4fb192be | 842 | mips_error ("Remote did not acknowledge packet"); |
33742334 ILT |
843 | } |
844 | ||
845 | /* Receive and acknowledge a packet, returning the data in BUFF (which | |
846 | should be DATA_MAXLEN + 1 bytes). The protocol documentation | |
847 | implies that only the sender retransmits packets, so this code just | |
848 | waits silently for a packet. It returns the length of the received | |
96e5f161 JK |
849 | packet. If THROW_ERROR is nonzero, call error() on errors. If not, |
850 | don't print an error message and return -1. */ | |
33742334 ILT |
851 | |
852 | static int | |
4c6071f7 | 853 | mips_receive_packet (buff, throw_error, timeout) |
33742334 | 854 | char *buff; |
96e5f161 | 855 | int throw_error; |
4c6071f7 | 856 | int timeout; |
33742334 ILT |
857 | { |
858 | int ch; | |
859 | int garbage; | |
860 | int len; | |
861 | unsigned char ack[HDR_LENGTH + TRLR_LENGTH + 1]; | |
862 | int cksum; | |
863 | ||
864 | ch = 0; | |
865 | garbage = 0; | |
866 | while (1) | |
867 | { | |
868 | unsigned char hdr[HDR_LENGTH]; | |
869 | unsigned char trlr[TRLR_LENGTH]; | |
870 | int i; | |
871 | int err; | |
872 | ||
4c6071f7 | 873 | if (mips_receive_header (hdr, &garbage, ch, timeout) != 0) |
96e5f161 JK |
874 | { |
875 | if (throw_error) | |
876 | mips_error ("Timed out waiting for remote packet"); | |
877 | else | |
878 | return -1; | |
879 | } | |
33742334 ILT |
880 | |
881 | ch = 0; | |
882 | ||
883 | /* An acknowledgement is probably a duplicate; ignore it. */ | |
884 | if (! HDR_IS_DATA (hdr)) | |
885 | { | |
090d784a JSC |
886 | len = HDR_GET_LEN (hdr); |
887 | /* Check if the length is valid for an ACK, we may aswell | |
888 | try and read the remainder of the packet: */ | |
889 | if (len == 0) | |
890 | { | |
891 | /* Ignore the error condition, since we are going to | |
892 | ignore the packet anyway. */ | |
893 | (void) mips_receive_trailer (trlr, &garbage, &ch, timeout); | |
894 | } | |
47d52968 JK |
895 | /* Don't use _filtered; we can't deal with a QUIT out of |
896 | target_wait, and I think this might be called from there. */ | |
cd10c7e3 | 897 | if (remote_debug > 0) |
47d52968 | 898 | printf_unfiltered ("Ignoring unexpected ACK\n"); |
33742334 ILT |
899 | continue; |
900 | } | |
901 | ||
33742334 | 902 | len = HDR_GET_LEN (hdr); |
33742334 ILT |
903 | for (i = 0; i < len; i++) |
904 | { | |
905 | int rch; | |
906 | ||
4c6071f7 | 907 | rch = mips_readchar (timeout); |
33742334 ILT |
908 | if (rch == SYN) |
909 | { | |
910 | ch = SYN; | |
911 | break; | |
912 | } | |
9a9a88c1 | 913 | if (rch == SERIAL_TIMEOUT) |
96e5f161 JK |
914 | { |
915 | if (throw_error) | |
916 | mips_error ("Timed out waiting for remote packet"); | |
917 | else | |
918 | return -1; | |
919 | } | |
33742334 ILT |
920 | buff[i] = rch; |
921 | } | |
922 | ||
923 | if (i < len) | |
924 | { | |
47d52968 JK |
925 | /* Don't use _filtered; we can't deal with a QUIT out of |
926 | target_wait, and I think this might be called from there. */ | |
cd10c7e3 | 927 | if (remote_debug > 0) |
47d52968 | 928 | printf_unfiltered ("Got new SYN after %d chars (wanted %d)\n", |
33742334 ILT |
929 | i, len); |
930 | continue; | |
931 | } | |
932 | ||
4c6071f7 | 933 | err = mips_receive_trailer (trlr, &garbage, &ch, timeout); |
33742334 | 934 | if (err == -1) |
96e5f161 JK |
935 | { |
936 | if (throw_error) | |
937 | mips_error ("Timed out waiting for packet"); | |
938 | else | |
939 | return -1; | |
940 | } | |
33742334 ILT |
941 | if (err == -2) |
942 | { | |
47d52968 JK |
943 | /* Don't use _filtered; we can't deal with a QUIT out of |
944 | target_wait, and I think this might be called from there. */ | |
cd10c7e3 | 945 | if (remote_debug > 0) |
47d52968 | 946 | printf_unfiltered ("Got SYN when wanted trailer\n"); |
33742334 ILT |
947 | continue; |
948 | } | |
949 | ||
090d784a JSC |
950 | /* If this is the wrong sequence number, ignore it. */ |
951 | if (HDR_GET_SEQ (hdr) != mips_receive_seq) | |
952 | { | |
953 | /* Don't use _filtered; we can't deal with a QUIT out of | |
954 | target_wait, and I think this might be called from there. */ | |
955 | if (remote_debug > 0) | |
956 | printf_unfiltered ("Ignoring sequence number %d (want %d)\n", | |
957 | HDR_GET_SEQ (hdr), mips_receive_seq); | |
958 | continue; | |
959 | } | |
960 | ||
33742334 | 961 | if (mips_cksum (hdr, buff, len) == TRLR_GET_CKSUM (trlr)) |
090d784a | 962 | break; |
33742334 | 963 | |
cd10c7e3 | 964 | if (remote_debug > 0) |
47d52968 JK |
965 | /* Don't use _filtered; we can't deal with a QUIT out of |
966 | target_wait, and I think this might be called from there. */ | |
967 | printf_unfiltered ("Bad checksum; data %d, trailer %d\n", | |
33742334 ILT |
968 | mips_cksum (hdr, buff, len), |
969 | TRLR_GET_CKSUM (trlr)); | |
970 | ||
971 | /* The checksum failed. Send an acknowledgement for the | |
972 | previous packet to tell the remote to resend the packet. */ | |
973 | ack[HDR_INDX_SYN] = HDR_SET_SYN (0, 0, mips_receive_seq); | |
974 | ack[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq); | |
975 | ack[HDR_INDX_LEN1] = HDR_SET_LEN1 (0, 0, mips_receive_seq); | |
976 | ack[HDR_INDX_SEQ] = HDR_SET_SEQ (0, 0, mips_receive_seq); | |
977 | ||
978 | cksum = mips_cksum (ack, (unsigned char *) NULL, 0); | |
979 | ||
980 | ack[HDR_LENGTH + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum); | |
981 | ack[HDR_LENGTH + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum); | |
982 | ack[HDR_LENGTH + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum); | |
983 | ||
cd10c7e3 | 984 | if (remote_debug > 0) |
33742334 ILT |
985 | { |
986 | ack[HDR_LENGTH + TRLR_LENGTH] = '\0'; | |
47d52968 JK |
987 | /* Don't use _filtered; we can't deal with a QUIT out of |
988 | target_wait, and I think this might be called from there. */ | |
989 | printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq, | |
33742334 ILT |
990 | ack + 1); |
991 | } | |
992 | ||
9a9a88c1 | 993 | if (SERIAL_WRITE (mips_desc, ack, HDR_LENGTH + TRLR_LENGTH) != 0) |
96e5f161 JK |
994 | { |
995 | if (throw_error) | |
996 | mips_error ("write to target failed: %s", safe_strerror (errno)); | |
997 | else | |
998 | return -1; | |
999 | } | |
33742334 ILT |
1000 | } |
1001 | ||
cd10c7e3 | 1002 | if (remote_debug > 0) |
33742334 ILT |
1003 | { |
1004 | buff[len] = '\0'; | |
47d52968 JK |
1005 | /* Don't use _filtered; we can't deal with a QUIT out of |
1006 | target_wait, and I think this might be called from there. */ | |
1007 | printf_unfiltered ("Got packet \"%s\"\n", buff); | |
33742334 ILT |
1008 | } |
1009 | ||
1010 | /* We got the packet. Send an acknowledgement. */ | |
1011 | mips_receive_seq = (mips_receive_seq + 1) % SEQ_MODULOS; | |
1012 | ||
1013 | ack[HDR_INDX_SYN] = HDR_SET_SYN (0, 0, mips_receive_seq); | |
1014 | ack[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq); | |
1015 | ack[HDR_INDX_LEN1] = HDR_SET_LEN1 (0, 0, mips_receive_seq); | |
1016 | ack[HDR_INDX_SEQ] = HDR_SET_SEQ (0, 0, mips_receive_seq); | |
1017 | ||
1018 | cksum = mips_cksum (ack, (unsigned char *) NULL, 0); | |
1019 | ||
1020 | ack[HDR_LENGTH + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum); | |
1021 | ack[HDR_LENGTH + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum); | |
1022 | ack[HDR_LENGTH + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum); | |
1023 | ||
cd10c7e3 | 1024 | if (remote_debug > 0) |
33742334 ILT |
1025 | { |
1026 | ack[HDR_LENGTH + TRLR_LENGTH] = '\0'; | |
47d52968 JK |
1027 | /* Don't use _filtered; we can't deal with a QUIT out of |
1028 | target_wait, and I think this might be called from there. */ | |
1029 | printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq, | |
33742334 ILT |
1030 | ack + 1); |
1031 | } | |
1032 | ||
9a9a88c1 | 1033 | if (SERIAL_WRITE (mips_desc, ack, HDR_LENGTH + TRLR_LENGTH) != 0) |
96e5f161 JK |
1034 | { |
1035 | if (throw_error) | |
1036 | mips_error ("write to target failed: %s", safe_strerror (errno)); | |
1037 | else | |
1038 | return -1; | |
1039 | } | |
33742334 ILT |
1040 | |
1041 | return len; | |
1042 | } | |
1043 | \f | |
1044 | /* Optionally send a request to the remote system and optionally wait | |
1045 | for the reply. This implements the remote debugging protocol, | |
1046 | which is built on top of the packet protocol defined above. Each | |
1047 | request has an ADDR argument and a DATA argument. The following | |
1048 | requests are defined: | |
1049 | ||
1050 | \0 don't send a request; just wait for a reply | |
1051 | i read word from instruction space at ADDR | |
1052 | d read word from data space at ADDR | |
1053 | I write DATA to instruction space at ADDR | |
1054 | D write DATA to data space at ADDR | |
1055 | r read register number ADDR | |
1056 | R set register number ADDR to value DATA | |
1057 | c continue execution (if ADDR != 1, set pc to ADDR) | |
1058 | s single step (if ADDR != 1, set pc to ADDR) | |
1059 | ||
1060 | The read requests return the value requested. The write requests | |
1061 | return the previous value in the changed location. The execution | |
1062 | requests return a UNIX wait value (the approximate signal which | |
1063 | caused execution to stop is in the upper eight bits). | |
1064 | ||
1065 | If PERR is not NULL, this function waits for a reply. If an error | |
1066 | occurs, it sets *PERR to 1 and sets errno according to what the | |
1067 | target board reports. */ | |
1068 | ||
1069 | static int | |
cd10c7e3 SG |
1070 | mips_request (cmd, addr, data, perr, timeout, buff) |
1071 | int cmd; | |
33742334 ILT |
1072 | unsigned int addr; |
1073 | unsigned int data; | |
1074 | int *perr; | |
4c6071f7 | 1075 | int timeout; |
cd10c7e3 | 1076 | char *buff; |
33742334 | 1077 | { |
cd10c7e3 | 1078 | char myBuff[DATA_MAXLEN + 1]; |
33742334 ILT |
1079 | int len; |
1080 | int rpid; | |
1081 | char rcmd; | |
1082 | int rerrflg; | |
1083 | int rresponse; | |
4887063b | 1084 | |
cd10c7e3 SG |
1085 | if (buff == (char *) NULL) |
1086 | buff = myBuff; | |
1087 | ||
33742334 ILT |
1088 | if (cmd != '\0') |
1089 | { | |
1090 | if (mips_need_reply) | |
1091 | fatal ("mips_request: Trying to send command before reply"); | |
1092 | sprintf (buff, "0x0 %c 0x%x 0x%x", cmd, addr, data); | |
c2a0f1cb | 1093 | mips_send_packet (buff, 1); |
33742334 ILT |
1094 | mips_need_reply = 1; |
1095 | } | |
1096 | ||
1097 | if (perr == (int *) NULL) | |
1098 | return 0; | |
1099 | ||
1100 | if (! mips_need_reply) | |
1101 | fatal ("mips_request: Trying to get reply before command"); | |
1102 | ||
1103 | mips_need_reply = 0; | |
1104 | ||
4c6071f7 | 1105 | len = mips_receive_packet (buff, 1, timeout); |
33742334 ILT |
1106 | buff[len] = '\0'; |
1107 | ||
1108 | if (sscanf (buff, "0x%x %c 0x%x 0x%x", | |
1109 | &rpid, &rcmd, &rerrflg, &rresponse) != 4 | |
33742334 | 1110 | || (cmd != '\0' && rcmd != cmd)) |
4fb192be | 1111 | mips_error ("Bad response from remote board"); |
33742334 ILT |
1112 | |
1113 | if (rerrflg != 0) | |
1114 | { | |
1115 | *perr = 1; | |
1116 | ||
1117 | /* FIXME: This will returns MIPS errno numbers, which may or may | |
1118 | not be the same as errno values used on other systems. If | |
1119 | they stick to common errno values, they will be the same, but | |
1120 | if they don't, they must be translated. */ | |
1121 | errno = rresponse; | |
1122 | ||
1123 | return 0; | |
1124 | } | |
1125 | ||
1126 | *perr = 0; | |
1127 | return rresponse; | |
1128 | } | |
1129 | ||
864df7e6 JK |
1130 | static void |
1131 | mips_initialize_cleanups (arg) | |
1132 | PTR arg; | |
1133 | { | |
1134 | mips_initializing = 0; | |
1135 | } | |
1136 | ||
090d784a JSC |
1137 | static void |
1138 | mips_send_command (cmd, prompt) | |
1139 | const char *cmd; | |
1140 | int prompt; | |
1141 | { | |
1142 | SERIAL_WRITE (mips_desc, cmd, strlen(cmd)); | |
1143 | mips_expect (cmd); | |
1144 | mips_expect ("\012"); | |
1145 | if (prompt) | |
1146 | mips_expect (mips_monitor_prompt); | |
1147 | } | |
1148 | ||
1149 | /* Enter remote (dbx) debug mode: */ | |
1150 | static void | |
1151 | mips_enter_debug () | |
1152 | { | |
1153 | /* Reset the sequence numbers, ready for the new debug sequence: */ | |
1154 | mips_send_seq = 0; | |
1155 | mips_receive_seq = 0; | |
1156 | ||
1157 | if (mips_monitor == MON_PMON) | |
1158 | mips_send_command ("debug\015", 0); | |
1159 | else /* assume IDT monitor by default */ | |
1160 | mips_send_command ("db tty0\015", 0); | |
1161 | ||
1162 | SERIAL_WRITE (mips_desc, "\015", sizeof "\015" - 1); | |
1163 | ||
1164 | /* We don't need to absorb any spurious characters here, since the | |
1165 | mips_receive_header will eat up a reasonable number of characters | |
1166 | whilst looking for the SYN, however this avoids the "garbage" | |
1167 | being displayed to the user. */ | |
1168 | if (mips_monitor == MON_PMON) | |
1169 | mips_expect ("\015"); | |
1170 | ||
1171 | { | |
1172 | char buff[DATA_MAXLEN + 1]; | |
1173 | if (mips_receive_packet (buff, 1, 3) < 0) | |
1174 | mips_error ("Failed to initialize (didn't receive packet)."); | |
1175 | } | |
1176 | } | |
1177 | ||
1178 | /* Exit remote (dbx) debug mode, returning to the monitor prompt: */ | |
1179 | static int | |
1180 | mips_exit_debug () | |
1181 | { | |
1182 | int err; | |
1183 | ||
1184 | mips_request ('x', (unsigned int) 0, (unsigned int) 0, &err, | |
1185 | mips_receive_wait, NULL); | |
1186 | ||
1187 | if (mips_monitor == MON_PMON && !mips_expect ("Exiting remote debug mode")) | |
1188 | return -1; | |
1189 | ||
1190 | if (!mips_expect ("\015\012")) | |
1191 | return -1; | |
1192 | ||
1193 | if (!mips_expect (mips_monitor_prompt)) | |
1194 | return -1; | |
1195 | ||
1196 | return 0; | |
1197 | } | |
1198 | ||
c2a0f1cb ILT |
1199 | /* Initialize a new connection to the MIPS board, and make sure we are |
1200 | really connected. */ | |
1201 | ||
1202 | static void | |
1203 | mips_initialize () | |
1204 | { | |
c2a0f1cb | 1205 | int err; |
864df7e6 | 1206 | struct cleanup *old_cleanups = make_cleanup (mips_initialize_cleanups, NULL); |
188c635f | 1207 | int j; |
c2a0f1cb | 1208 | |
864df7e6 JK |
1209 | /* What is this code doing here? I don't see any way it can happen, and |
1210 | it might mean mips_initializing didn't get cleared properly. | |
1211 | So I'll make it a warning. */ | |
188c635f | 1212 | |
c2a0f1cb | 1213 | if (mips_initializing) |
864df7e6 JK |
1214 | { |
1215 | warning ("internal error: mips_initialize called twice"); | |
1216 | return; | |
1217 | } | |
c2a0f1cb | 1218 | |
cd10c7e3 | 1219 | mips_wait_flag = 0; |
c2a0f1cb ILT |
1220 | mips_initializing = 1; |
1221 | ||
188c635f SG |
1222 | /* At this point, the packit protocol isn't responding. We'll try getting |
1223 | into the monitor, and restarting the protocol. */ | |
4704fd9c | 1224 | |
090d784a JSC |
1225 | /* Force the system into the monitor. After this we *should* be at |
1226 | the mips_monitor_prompt. */ | |
1227 | if (mips_monitor == MON_PMON) | |
1228 | j = 0; /* start by checking if we are already at the prompt */ | |
1229 | else | |
1230 | j = 1; /* start by sending a break */ | |
1231 | for (; j <= 4; j++) | |
188c635f SG |
1232 | { |
1233 | switch (j) | |
4704fd9c | 1234 | { |
090d784a JSC |
1235 | case 0: /* First, try sending a CR */ |
1236 | SERIAL_FLUSH_INPUT (mips_desc); | |
1237 | SERIAL_WRITE (mips_desc, "\015", 1); | |
1238 | break; | |
188c635f SG |
1239 | case 1: /* First, try sending a break */ |
1240 | SERIAL_SEND_BREAK (mips_desc); | |
1241 | break; | |
1242 | case 2: /* Then, try a ^C */ | |
1243 | SERIAL_WRITE (mips_desc, "\003", 1); | |
1244 | break; | |
1245 | case 3: /* Then, try escaping from download */ | |
1246 | { | |
090d784a JSC |
1247 | if (mips_monitor == MON_PMON) |
1248 | { | |
1249 | char tbuff[7]; | |
1250 | ||
1251 | /* We shouldn't need to send multiple termination | |
1252 | sequences, since the target performs line (or | |
1253 | block) reads, and then processes those | |
1254 | packets. In-case we were downloading a large packet | |
1255 | we flush the output buffer before inserting a | |
1256 | termination sequence. */ | |
1257 | SERIAL_FLUSH_OUTPUT (mips_desc); | |
1258 | sprintf (tbuff, "\015/E/E\015"); | |
1259 | SERIAL_WRITE (mips_desc, tbuff, 6); | |
1260 | } | |
1261 | else | |
1262 | { | |
1263 | char srec[10]; | |
1264 | int i; | |
1265 | ||
1266 | /* We are possibly in binary download mode, having | |
1267 | aborted in the middle of an S-record. ^C won't | |
1268 | work because of binary mode. The only reliable way | |
1269 | out is to send enough termination packets (8 bytes) | |
1270 | to fill up and then overflow the largest size | |
1271 | S-record (255 bytes in this case). This amounts to | |
1272 | 256/8 + 1 packets. | |
1273 | */ | |
1274 | ||
1275 | mips_make_srec (srec, '7', 0, NULL, 0); | |
1276 | ||
1277 | for (i = 1; i <= 33; i++) | |
1278 | { | |
1279 | SERIAL_WRITE (mips_desc, srec, 8); | |
1280 | ||
1281 | if (SERIAL_READCHAR (mips_desc, 0) >= 0) | |
1282 | break; /* Break immediatly if we get something from | |
4704fd9c | 1283 | the board. */ |
090d784a JSC |
1284 | } |
1285 | } | |
1286 | } | |
afb69487 | 1287 | break; |
8b07d12c | 1288 | case 4: |
afb69487 | 1289 | mips_error ("Failed to initialize."); |
4704fd9c SG |
1290 | } |
1291 | ||
090d784a | 1292 | if (mips_expect (mips_monitor_prompt)) |
afb69487 | 1293 | break; |
c2a0f1cb | 1294 | } |
afb69487 | 1295 | |
090d784a JSC |
1296 | if (mips_monitor == MON_PMON) |
1297 | { | |
1298 | /* Ensure the correct target state: */ | |
1299 | mips_send_command ("set regsize 64\015", -1); | |
1300 | mips_send_command ("set hostport tty0\015", -1); | |
1301 | mips_send_command ("set brkcmd \"\"\015", -1); | |
1302 | /* Delete all the current breakpoints: */ | |
1303 | mips_send_command ("db *\015", -1); | |
1304 | /* NOTE: PMON does not have breakpoint support through the | |
1305 | "debug" mode, only at the monitor command-line. */ | |
1306 | } | |
afb69487 | 1307 | |
090d784a | 1308 | mips_enter_debug (); |
c2a0f1cb | 1309 | |
090d784a JSC |
1310 | /* Clear all breakpoints: */ |
1311 | if (common_breakpoint ('b', -1, 0, NULL)) | |
1312 | monitor_supports_breakpoints = 0; | |
cd10c7e3 | 1313 | else |
090d784a | 1314 | monitor_supports_breakpoints = 1; |
cd10c7e3 | 1315 | |
864df7e6 | 1316 | do_cleanups (old_cleanups); |
c2a0f1cb ILT |
1317 | |
1318 | /* If this doesn't call error, we have connected; we don't care if | |
1319 | the request itself succeeds or fails. */ | |
188c635f | 1320 | |
4c6071f7 | 1321 | mips_request ('r', (unsigned int) 0, (unsigned int) 0, &err, |
cd10c7e3 SG |
1322 | mips_receive_wait, NULL); |
1323 | set_current_frame (create_new_frame (read_fp (), read_pc ())); | |
1324 | select_frame (get_current_frame (), 0); | |
c2a0f1cb ILT |
1325 | } |
1326 | ||
33742334 | 1327 | /* Open a connection to the remote board. */ |
33742334 | 1328 | static void |
090d784a JSC |
1329 | common_open (ops, name, from_tty) |
1330 | struct target_ops *ops; | |
33742334 ILT |
1331 | char *name; |
1332 | int from_tty; | |
1333 | { | |
ae55bdbc SS |
1334 | char *ptype; |
1335 | ||
33742334 ILT |
1336 | if (name == 0) |
1337 | error ( | |
1338 | "To open a MIPS remote debugging connection, you need to specify what serial\n\ | |
1339 | device is attached to the target board (e.g., /dev/ttya)."); | |
1340 | ||
1341 | target_preopen (from_tty); | |
1342 | ||
1343 | if (mips_is_open) | |
090d784a | 1344 | unpush_target (current_ops); |
33742334 | 1345 | |
1724c671 | 1346 | mips_desc = SERIAL_OPEN (name); |
9a9a88c1 | 1347 | if (mips_desc == (serial_t) NULL) |
33742334 ILT |
1348 | perror_with_name (name); |
1349 | ||
d48d9a28 KH |
1350 | if (baud_rate != -1) |
1351 | { | |
1352 | if (SERIAL_SETBAUDRATE (mips_desc, baud_rate)) | |
1353 | { | |
1354 | SERIAL_CLOSE (mips_desc); | |
1355 | perror_with_name (name); | |
1356 | } | |
1357 | } | |
1358 | ||
1724c671 SG |
1359 | SERIAL_RAW (mips_desc); |
1360 | ||
090d784a | 1361 | current_ops = ops; |
33742334 ILT |
1362 | mips_is_open = 1; |
1363 | ||
c2a0f1cb | 1364 | mips_initialize (); |
33742334 ILT |
1365 | |
1366 | if (from_tty) | |
199b2450 | 1367 | printf_unfiltered ("Remote MIPS debugging using %s\n", name); |
ae55bdbc SS |
1368 | |
1369 | /* Switch to using remote target now. */ | |
090d784a | 1370 | push_target (ops); |
33742334 | 1371 | |
c2a0f1cb | 1372 | /* FIXME: Should we call start_remote here? */ |
ae55bdbc SS |
1373 | |
1374 | /* Try to figure out the processor model if possible. */ | |
1375 | ptype = mips_read_processor_type (); | |
1376 | if (ptype) | |
1377 | mips_set_processor_type_command (strsave (ptype), 0); | |
4887063b SG |
1378 | |
1379 | /* This is really the job of start_remote however, that makes an assumption | |
1380 | that the target is about to print out a status message of some sort. That | |
1381 | doesn't happen here (in fact, it may not be possible to get the monitor to | |
1382 | send the appropriate packet). */ | |
1383 | ||
1384 | flush_cached_frames (); | |
1385 | registers_changed (); | |
1386 | stop_pc = read_pc (); | |
1387 | set_current_frame (create_new_frame (read_fp (), stop_pc)); | |
1388 | select_frame (get_current_frame (), 0); | |
1389 | print_stack_frame (selected_frame, -1, 1); | |
33742334 ILT |
1390 | } |
1391 | ||
090d784a JSC |
1392 | static void |
1393 | mips_open (name, from_tty) | |
1394 | char *name; | |
1395 | int from_tty; | |
1396 | { | |
1397 | mips_monitor = MON_IDT; | |
1398 | common_open (&mips_ops, name, from_tty); | |
1399 | } | |
1400 | ||
1401 | static void | |
1402 | pmon_open (name, from_tty) | |
1403 | char *name; | |
1404 | int from_tty; | |
1405 | { | |
1406 | /* The PMON monitor has a prompt different from the default | |
1407 | "TARGET_MONITOR_PROMPT": */ | |
1408 | mips_monitor_prompt = "PMON> "; | |
1409 | mips_monitor = MON_PMON; | |
1410 | common_open (&pmon_ops, name, from_tty); | |
1411 | } | |
1412 | ||
1413 | ||
33742334 ILT |
1414 | /* Close a connection to the remote board. */ |
1415 | ||
1416 | static void | |
1417 | mips_close (quitting) | |
1418 | int quitting; | |
1419 | { | |
1420 | if (mips_is_open) | |
1421 | { | |
c2a0f1cb ILT |
1422 | int err; |
1423 | ||
1424 | mips_is_open = 0; | |
1425 | ||
33742334 | 1426 | /* Get the board out of remote debugging mode. */ |
090d784a | 1427 | (void) mips_exit_debug (); |
c2a0f1cb | 1428 | |
1724c671 | 1429 | SERIAL_CLOSE (mips_desc); |
33742334 ILT |
1430 | } |
1431 | } | |
1432 | ||
1433 | /* Detach from the remote board. */ | |
1434 | ||
1435 | static void | |
1436 | mips_detach (args, from_tty) | |
1437 | char *args; | |
1438 | int from_tty; | |
1439 | { | |
1440 | if (args) | |
1441 | error ("Argument given to \"detach\" when remotely debugging."); | |
1442 | ||
1443 | pop_target (); | |
cd10c7e3 SG |
1444 | |
1445 | mips_close (1); | |
1446 | ||
33742334 | 1447 | if (from_tty) |
199b2450 | 1448 | printf_unfiltered ("Ending remote MIPS debugging.\n"); |
33742334 ILT |
1449 | } |
1450 | ||
1451 | /* Tell the target board to resume. This does not wait for a reply | |
1452 | from the board. */ | |
1453 | ||
1454 | static void | |
25286543 | 1455 | mips_resume (pid, step, siggnal) |
67ac9759 JK |
1456 | int pid, step; |
1457 | enum target_signal siggnal; | |
33742334 | 1458 | { |
cd10c7e3 SG |
1459 | |
1460 | /* start-sanitize-gm */ | |
188c635f | 1461 | #ifndef GENERAL_MAGIC |
67ac9759 JK |
1462 | if (siggnal != TARGET_SIGNAL_0) |
1463 | warning | |
1464 | ("Can't send signals to a remote system. Try `handle %s ignore'.", | |
1465 | target_signal_to_name (siggnal)); | |
188c635f | 1466 | #endif /* GENERAL_MAGIC */ |
cd10c7e3 | 1467 | /* end-sanitize-gm */ |
33742334 ILT |
1468 | |
1469 | mips_request (step ? 's' : 'c', | |
c2a0f1cb | 1470 | (unsigned int) 1, |
cd10c7e3 | 1471 | (unsigned int) siggnal, |
4c6071f7 | 1472 | (int *) NULL, |
cd10c7e3 | 1473 | mips_receive_wait, NULL); |
33742334 ILT |
1474 | } |
1475 | ||
f3fe8934 JK |
1476 | /* Return the signal corresponding to SIG, where SIG is the number which |
1477 | the MIPS protocol uses for the signal. */ | |
1478 | enum target_signal | |
1479 | mips_signal_from_protocol (sig) | |
1480 | int sig; | |
1481 | { | |
1482 | /* We allow a few more signals than the IDT board actually returns, on | |
1483 | the theory that there is at least *some* hope that perhaps the numbering | |
1484 | for these signals is widely agreed upon. */ | |
1485 | if (sig <= 0 | |
1486 | || sig > 31) | |
1487 | return TARGET_SIGNAL_UNKNOWN; | |
1488 | ||
1489 | /* Don't want to use target_signal_from_host because we are converting | |
1490 | from MIPS signal numbers, not host ones. Our internal numbers | |
1491 | match the MIPS numbers for the signals the board can return, which | |
1492 | are: SIGINT, SIGSEGV, SIGBUS, SIGILL, SIGFPE, SIGTRAP. */ | |
1493 | return (enum target_signal) sig; | |
1494 | } | |
1495 | ||
33742334 ILT |
1496 | /* Wait until the remote stops, and return a wait status. */ |
1497 | ||
1498 | static int | |
f7fa951f DZ |
1499 | mips_wait (pid, status) |
1500 | int pid; | |
67ac9759 | 1501 | struct target_waitstatus *status; |
33742334 ILT |
1502 | { |
1503 | int rstatus; | |
1504 | int err; | |
cd10c7e3 SG |
1505 | char buff[DATA_MAXLEN]; |
1506 | int rpc, rfp, rsp; | |
1507 | char flags[20]; | |
1508 | int nfields; | |
1509 | ||
1510 | interrupt_count = 0; | |
1511 | hit_watchpoint = 0; | |
33742334 ILT |
1512 | |
1513 | /* If we have not sent a single step or continue command, then the | |
1514 | board is waiting for us to do something. Return a status | |
1515 | indicating that it is stopped. */ | |
1516 | if (! mips_need_reply) | |
1517 | { | |
67ac9759 JK |
1518 | status->kind = TARGET_WAITKIND_STOPPED; |
1519 | status->value.sig = TARGET_SIGNAL_TRAP; | |
33742334 ILT |
1520 | return 0; |
1521 | } | |
1522 | ||
4c6071f7 | 1523 | /* No timeout; we sit here as long as the program continues to execute. */ |
cd10c7e3 SG |
1524 | mips_wait_flag = 1; |
1525 | rstatus = mips_request ('\000', (unsigned int) 0, (unsigned int) 0, &err, -1, | |
1526 | buff); | |
1527 | mips_wait_flag = 0; | |
33742334 | 1528 | if (err) |
4fb192be | 1529 | mips_error ("Remote failure: %s", safe_strerror (errno)); |
33742334 | 1530 | |
cd10c7e3 SG |
1531 | nfields = sscanf (buff, "0x%*x %*c 0x%*x 0x%*x 0x%x 0x%x 0x%x 0x%*x %s", |
1532 | &rpc, &rfp, &rsp, flags); | |
1533 | ||
1534 | /* See if we got back extended status. If so, pick out the pc, fp, sp, etc... */ | |
1535 | ||
1536 | if (nfields == 7 || nfields == 9) | |
1537 | { | |
1538 | char buf[MAX_REGISTER_RAW_SIZE]; | |
1539 | ||
1540 | store_unsigned_integer (buf, REGISTER_RAW_SIZE (PC_REGNUM), rpc); | |
1541 | supply_register (PC_REGNUM, buf); | |
1542 | ||
1543 | store_unsigned_integer (buf, REGISTER_RAW_SIZE (PC_REGNUM), rfp); | |
1544 | supply_register (30, buf); /* This register they are avoiding and so it is unnamed */ | |
1545 | ||
1546 | store_unsigned_integer (buf, REGISTER_RAW_SIZE (SP_REGNUM), rsp); | |
1547 | supply_register (SP_REGNUM, buf); | |
1548 | ||
1549 | store_unsigned_integer (buf, REGISTER_RAW_SIZE (FP_REGNUM), 0); | |
1550 | supply_register (FP_REGNUM, buf); | |
1551 | ||
1552 | if (nfields == 9) | |
1553 | { | |
1554 | int i; | |
1555 | ||
1556 | for (i = 0; i <= 2; i++) | |
1557 | if (flags[i] == 'r' || flags[i] == 'w') | |
1558 | hit_watchpoint = 1; | |
1559 | else if (flags[i] == '\000') | |
1560 | break; | |
1561 | } | |
1562 | } | |
1563 | ||
67ac9759 JK |
1564 | /* Translate a MIPS waitstatus. We use constants here rather than WTERMSIG |
1565 | and so on, because the constants we want here are determined by the | |
1566 | MIPS protocol and have nothing to do with what host we are running on. */ | |
6397809b | 1567 | if ((rstatus & 0377) == 0) |
67ac9759 JK |
1568 | { |
1569 | status->kind = TARGET_WAITKIND_EXITED; | |
1570 | status->value.integer = (((rstatus) >> 8) & 0377); | |
1571 | } | |
6397809b | 1572 | else if ((rstatus & 0377) == 0177) |
67ac9759 | 1573 | { |
5efb3899 | 1574 | status->kind = TARGET_WAITKIND_STOPPED; |
f3fe8934 | 1575 | status->value.sig = mips_signal_from_protocol (((rstatus) >> 8) & 0377); |
67ac9759 JK |
1576 | } |
1577 | else | |
1578 | { | |
1579 | status->kind = TARGET_WAITKIND_SIGNALLED; | |
f3fe8934 | 1580 | status->value.sig = mips_signal_from_protocol (rstatus & 0177); |
67ac9759 | 1581 | } |
33742334 ILT |
1582 | |
1583 | return 0; | |
1584 | } | |
1585 | ||
090d784a JSC |
1586 | static int |
1587 | pmon_wait (pid, status) | |
1588 | int pid; | |
1589 | struct target_waitstatus *status; | |
1590 | { | |
1591 | int rstatus; | |
1592 | int err; | |
1593 | char buff[DATA_MAXLEN]; | |
1594 | ||
1595 | interrupt_count = 0; | |
1596 | hit_watchpoint = 0; | |
1597 | ||
1598 | /* If we have not sent a single step or continue command, then the | |
1599 | board is waiting for us to do something. Return a status | |
1600 | indicating that it is stopped. */ | |
1601 | if (! mips_need_reply) | |
1602 | { | |
1603 | status->kind = TARGET_WAITKIND_STOPPED; | |
1604 | status->value.sig = TARGET_SIGNAL_TRAP; | |
1605 | return 0; | |
1606 | } | |
1607 | ||
1608 | /* Sit, polling the serial until the target decides to talk to | |
1609 | us. NOTE: the timeout value we use is used not just for the | |
1610 | first character, but for all the characters. */ | |
1611 | mips_wait_flag = 1; | |
1612 | rstatus = mips_request ('\000', (unsigned int) 0, (unsigned int) 0, &err, -1, | |
1613 | buff); | |
1614 | mips_wait_flag = 0; | |
1615 | if (err) | |
1616 | mips_error ("Remote failure: %s", safe_strerror (errno)); | |
1617 | ||
1618 | /* NOTE: The following (sig) numbers are defined by PMON: | |
1619 | SPP_SIGTRAP 5 breakpoint | |
1620 | SPP_SIGINT 2 | |
1621 | SPP_SIGSEGV 11 | |
1622 | SPP_SIGBUS 10 | |
1623 | SPP_SIGILL 4 | |
1624 | SPP_SIGFPE 8 | |
1625 | SPP_SIGTERM 15 */ | |
1626 | ||
1627 | /* On returning from a continue, the PMON monitor seems to start | |
1628 | echoing back the messages we send prior to sending back the | |
1629 | ACK. The code can cope with this, but to try and avoid the | |
1630 | unnecessary serial traffic, and "spurious" characters displayed | |
1631 | to the user, we cheat and reset the debug protocol. The problems | |
1632 | seems to be caused by a check on the number of arguments, and the | |
1633 | command length, within the monitor causing it to echo the command | |
1634 | as a bad packet. */ | |
1635 | mips_exit_debug (); | |
1636 | mips_enter_debug (); | |
1637 | ||
1638 | /* Translate a MIPS waitstatus. We use constants here rather than WTERMSIG | |
1639 | and so on, because the constants we want here are determined by the | |
1640 | MIPS protocol and have nothing to do with what host we are running on. */ | |
1641 | if ((rstatus & 0377) == 0) | |
1642 | { | |
1643 | status->kind = TARGET_WAITKIND_EXITED; | |
1644 | status->value.integer = (((rstatus) >> 8) & 0377); | |
1645 | } | |
1646 | else if ((rstatus & 0377) == 0177) | |
1647 | { | |
1648 | status->kind = TARGET_WAITKIND_STOPPED; | |
1649 | status->value.sig = mips_signal_from_protocol (((rstatus) >> 8) & 0377); | |
1650 | } | |
1651 | else | |
1652 | { | |
1653 | status->kind = TARGET_WAITKIND_SIGNALLED; | |
1654 | status->value.sig = mips_signal_from_protocol (rstatus & 0177); | |
1655 | } | |
1656 | ||
1657 | return 0; | |
1658 | } | |
1659 | ||
33742334 ILT |
1660 | /* We have to map between the register numbers used by gdb and the |
1661 | register numbers used by the debugging protocol. This function | |
1662 | assumes that we are using tm-mips.h. */ | |
1663 | ||
1664 | #define REGNO_OFFSET 96 | |
1665 | ||
1666 | static int | |
1667 | mips_map_regno (regno) | |
1668 | int regno; | |
1669 | { | |
1670 | if (regno < 32) | |
1671 | return regno; | |
1672 | if (regno >= FP0_REGNUM && regno < FP0_REGNUM + 32) | |
1673 | return regno - FP0_REGNUM + 32; | |
1674 | switch (regno) | |
1675 | { | |
1676 | case PC_REGNUM: | |
1677 | return REGNO_OFFSET + 0; | |
1678 | case CAUSE_REGNUM: | |
1679 | return REGNO_OFFSET + 1; | |
1680 | case HI_REGNUM: | |
1681 | return REGNO_OFFSET + 2; | |
1682 | case LO_REGNUM: | |
1683 | return REGNO_OFFSET + 3; | |
1684 | case FCRCS_REGNUM: | |
1685 | return REGNO_OFFSET + 4; | |
1686 | case FCRIR_REGNUM: | |
1687 | return REGNO_OFFSET + 5; | |
1688 | default: | |
1689 | /* FIXME: Is there a way to get the status register? */ | |
1690 | return 0; | |
1691 | } | |
1692 | } | |
1693 | ||
1694 | /* Fetch the remote registers. */ | |
1695 | ||
1696 | static void | |
1697 | mips_fetch_registers (regno) | |
1698 | int regno; | |
1699 | { | |
f4f0d174 | 1700 | unsigned LONGEST val; |
33742334 ILT |
1701 | int err; |
1702 | ||
1703 | if (regno == -1) | |
1704 | { | |
1705 | for (regno = 0; regno < NUM_REGS; regno++) | |
1706 | mips_fetch_registers (regno); | |
1707 | return; | |
1708 | } | |
1709 | ||
021b10e3 JK |
1710 | if (regno == FP_REGNUM || regno == ZERO_REGNUM) |
1711 | /* FP_REGNUM on the mips is a hack which is just supposed to read | |
1712 | zero (see also mips-nat.c). */ | |
1713 | val = 0; | |
1714 | else | |
1715 | { | |
090d784a JSC |
1716 | #if 0 /* Unfortunately the PMON version in the Vr4300 board has been |
1717 | compiled without the 64bit register access commands. This | |
1718 | means we cannot get hold of the full register width. */ | |
1719 | if (mips_monitor == MON_PMON) | |
1720 | val = mips_request ('t', (unsigned int) mips_map_regno (regno), | |
1721 | (unsigned int) 0, &err, mips_receive_wait, NULL); | |
1722 | else | |
1723 | #endif | |
1724 | val = mips_request ('r', (unsigned int) mips_map_regno (regno), | |
1725 | (unsigned int) 0, &err, mips_receive_wait, NULL); | |
021b10e3 JK |
1726 | if (err) |
1727 | mips_error ("Can't read register %d: %s", regno, | |
1728 | safe_strerror (errno)); | |
1729 | } | |
33742334 | 1730 | |
34df79fc JK |
1731 | { |
1732 | char buf[MAX_REGISTER_RAW_SIZE]; | |
1733 | ||
1734 | /* We got the number the register holds, but gdb expects to see a | |
1735 | value in the target byte ordering. */ | |
1736 | store_unsigned_integer (buf, REGISTER_RAW_SIZE (regno), val); | |
1737 | supply_register (regno, buf); | |
1738 | } | |
33742334 ILT |
1739 | } |
1740 | ||
1741 | /* Prepare to store registers. The MIPS protocol can store individual | |
1742 | registers, so this function doesn't have to do anything. */ | |
1743 | ||
1744 | static void | |
1745 | mips_prepare_to_store () | |
1746 | { | |
1747 | } | |
1748 | ||
1749 | /* Store remote register(s). */ | |
1750 | ||
1751 | static void | |
1752 | mips_store_registers (regno) | |
1753 | int regno; | |
1754 | { | |
1755 | int err; | |
1756 | ||
1757 | if (regno == -1) | |
1758 | { | |
1759 | for (regno = 0; regno < NUM_REGS; regno++) | |
1760 | mips_store_registers (regno); | |
1761 | return; | |
1762 | } | |
1763 | ||
1764 | mips_request ('R', (unsigned int) mips_map_regno (regno), | |
1765 | (unsigned int) read_register (regno), | |
cd10c7e3 | 1766 | &err, mips_receive_wait, NULL); |
33742334 | 1767 | if (err) |
4fb192be | 1768 | mips_error ("Can't write register %d: %s", regno, safe_strerror (errno)); |
33742334 ILT |
1769 | } |
1770 | ||
1771 | /* Fetch a word from the target board. */ | |
1772 | ||
1773 | static int | |
1774 | mips_fetch_word (addr) | |
1775 | CORE_ADDR addr; | |
1776 | { | |
1777 | int val; | |
1778 | int err; | |
1779 | ||
4c6071f7 | 1780 | val = mips_request ('d', (unsigned int) addr, (unsigned int) 0, &err, |
cd10c7e3 | 1781 | mips_receive_wait, NULL); |
33742334 ILT |
1782 | if (err) |
1783 | { | |
1784 | /* Data space failed; try instruction space. */ | |
4c6071f7 | 1785 | val = mips_request ('i', (unsigned int) addr, (unsigned int) 0, &err, |
cd10c7e3 | 1786 | mips_receive_wait, NULL); |
33742334 | 1787 | if (err) |
4fb192be | 1788 | mips_error ("Can't read address 0x%x: %s", addr, safe_strerror (errno)); |
33742334 ILT |
1789 | } |
1790 | return val; | |
1791 | } | |
1792 | ||
aa56c716 JK |
1793 | /* Store a word to the target board. Returns errno code or zero for |
1794 | success. If OLD_CONTENTS is non-NULL, put the old contents of that | |
1795 | memory location there. */ | |
33742334 | 1796 | |
aa56c716 JK |
1797 | static int |
1798 | mips_store_word (addr, val, old_contents) | |
33742334 ILT |
1799 | CORE_ADDR addr; |
1800 | int val; | |
aa56c716 | 1801 | char *old_contents; |
33742334 ILT |
1802 | { |
1803 | int err; | |
aa56c716 | 1804 | unsigned int oldcontents; |
33742334 | 1805 | |
aa56c716 JK |
1806 | oldcontents = mips_request ('D', (unsigned int) addr, (unsigned int) val, |
1807 | &err, | |
cd10c7e3 | 1808 | mips_receive_wait, NULL); |
33742334 ILT |
1809 | if (err) |
1810 | { | |
1811 | /* Data space failed; try instruction space. */ | |
aa56c716 JK |
1812 | oldcontents = mips_request ('I', (unsigned int) addr, |
1813 | (unsigned int) val, &err, | |
cd10c7e3 | 1814 | mips_receive_wait, NULL); |
33742334 | 1815 | if (err) |
aa56c716 | 1816 | return errno; |
33742334 | 1817 | } |
aa56c716 JK |
1818 | if (old_contents != NULL) |
1819 | store_unsigned_integer (old_contents, 4, oldcontents); | |
1820 | return 0; | |
33742334 ILT |
1821 | } |
1822 | ||
1823 | /* Read or write LEN bytes from inferior memory at MEMADDR, | |
1824 | transferring to or from debugger address MYADDR. Write to inferior | |
1825 | if SHOULD_WRITE is nonzero. Returns length of data written or | |
1826 | read; 0 for error. Note that protocol gives us the correct value | |
1827 | for a longword, since it transfers values in ASCII. We want the | |
1828 | byte values, so we have to swap the longword values. */ | |
1829 | ||
1830 | static int | |
1831 | mips_xfer_memory (memaddr, myaddr, len, write, ignore) | |
1832 | CORE_ADDR memaddr; | |
1833 | char *myaddr; | |
1834 | int len; | |
1835 | int write; | |
1836 | struct target_ops *ignore; | |
1837 | { | |
1838 | register int i; | |
1839 | /* Round starting address down to longword boundary. */ | |
1840 | register CORE_ADDR addr = memaddr &~ 3; | |
1841 | /* Round ending address up; get number of longwords that makes. */ | |
1842 | register int count = (((memaddr + len) - addr) + 3) / 4; | |
1843 | /* Allocate buffer of that many longwords. */ | |
34df79fc | 1844 | register char *buffer = alloca (count * 4); |
33742334 | 1845 | |
aa56c716 JK |
1846 | int status; |
1847 | ||
33742334 ILT |
1848 | if (write) |
1849 | { | |
1850 | /* Fill start and end extra bytes of buffer with existing data. */ | |
1851 | if (addr != memaddr || len < 4) | |
1852 | { | |
1853 | /* Need part of initial word -- fetch it. */ | |
34df79fc | 1854 | store_unsigned_integer (&buffer[0], 4, mips_fetch_word (addr)); |
33742334 ILT |
1855 | } |
1856 | ||
34df79fc | 1857 | if (count > 1) |
33742334 | 1858 | { |
34df79fc JK |
1859 | /* Need part of last word -- fetch it. FIXME: we do this even |
1860 | if we don't need it. */ | |
1861 | store_unsigned_integer (&buffer[(count - 1) * 4], 4, | |
1862 | mips_fetch_word (addr + (count - 1) * 4)); | |
33742334 ILT |
1863 | } |
1864 | ||
1865 | /* Copy data to be written over corresponding part of buffer */ | |
1866 | ||
1867 | memcpy ((char *) buffer + (memaddr & 3), myaddr, len); | |
1868 | ||
1869 | /* Write the entire buffer. */ | |
1870 | ||
1871 | for (i = 0; i < count; i++, addr += 4) | |
1872 | { | |
aa56c716 JK |
1873 | status = mips_store_word (addr, |
1874 | extract_unsigned_integer (&buffer[i*4], 4), | |
1875 | NULL); | |
7d13174e SS |
1876 | /* Report each kilobyte (we download 32-bit words at a time) */ |
1877 | if (i % 256 == 255) | |
1878 | { | |
1879 | printf_unfiltered ("*"); | |
1880 | fflush (stdout); | |
1881 | } | |
aa56c716 JK |
1882 | if (status) |
1883 | { | |
1884 | errno = status; | |
1885 | return 0; | |
1886 | } | |
34df79fc | 1887 | /* FIXME: Do we want a QUIT here? */ |
33742334 | 1888 | } |
7d13174e SS |
1889 | if (count >= 256) |
1890 | printf_unfiltered ("\n"); | |
33742334 ILT |
1891 | } |
1892 | else | |
1893 | { | |
1894 | /* Read all the longwords */ | |
1895 | for (i = 0; i < count; i++, addr += 4) | |
1896 | { | |
34df79fc | 1897 | store_unsigned_integer (&buffer[i*4], 4, mips_fetch_word (addr)); |
33742334 ILT |
1898 | QUIT; |
1899 | } | |
1900 | ||
1901 | /* Copy appropriate bytes out of the buffer. */ | |
34df79fc | 1902 | memcpy (myaddr, buffer + (memaddr & 3), len); |
33742334 ILT |
1903 | } |
1904 | return len; | |
1905 | } | |
1906 | ||
1907 | /* Print info on this target. */ | |
1908 | ||
1909 | static void | |
1910 | mips_files_info (ignore) | |
1911 | struct target_ops *ignore; | |
1912 | { | |
199b2450 | 1913 | printf_unfiltered ("Debugging a MIPS board over a serial line.\n"); |
33742334 ILT |
1914 | } |
1915 | ||
c2a0f1cb ILT |
1916 | /* Kill the process running on the board. This will actually only |
1917 | work if we are doing remote debugging over the console input. I | |
1918 | think that if IDT/sim had the remote debug interrupt enabled on the | |
1919 | right port, we could interrupt the process with a break signal. */ | |
1920 | ||
1921 | static void | |
1922 | mips_kill () | |
1923 | { | |
cd10c7e3 SG |
1924 | if (!mips_wait_flag) |
1925 | return; | |
1926 | ||
1927 | interrupt_count++; | |
1928 | ||
1929 | if (interrupt_count >= 2) | |
1930 | { | |
1931 | interrupt_count = 0; | |
1932 | ||
1933 | target_terminal_ours (); | |
1934 | ||
1935 | if (query ("Interrupted while waiting for the program.\n\ | |
1936 | Give up (and stop debugging it)? ")) | |
1937 | { | |
1938 | /* Clean up in such a way that mips_close won't try to talk to the | |
1939 | board (it almost surely won't work since we weren't able to talk to | |
1940 | it). */ | |
1941 | mips_wait_flag = 0; | |
1942 | mips_is_open = 0; | |
1943 | SERIAL_CLOSE (mips_desc); | |
1944 | ||
1945 | printf_unfiltered ("Ending remote MIPS debugging.\n"); | |
1946 | target_mourn_inferior (); | |
1947 | ||
1948 | return_to_top_level (RETURN_QUIT); | |
1949 | } | |
1950 | ||
1951 | target_terminal_inferior (); | |
1952 | } | |
1953 | ||
1954 | if (remote_debug > 0) | |
1955 | printf_unfiltered ("Sending break\n"); | |
1956 | ||
1957 | SERIAL_SEND_BREAK (mips_desc); | |
1958 | ||
c2a0f1cb ILT |
1959 | #if 0 |
1960 | if (mips_is_open) | |
1961 | { | |
1962 | char cc; | |
1963 | ||
1964 | /* Send a ^C. */ | |
1965 | cc = '\003'; | |
1724c671 | 1966 | SERIAL_WRITE (mips_desc, &cc, 1); |
c2a0f1cb ILT |
1967 | sleep (1); |
1968 | target_mourn_inferior (); | |
1969 | } | |
1970 | #endif | |
1971 | } | |
1972 | ||
33742334 ILT |
1973 | /* Start running on the target board. */ |
1974 | ||
1975 | static void | |
1976 | mips_create_inferior (execfile, args, env) | |
1977 | char *execfile; | |
1978 | char *args; | |
1979 | char **env; | |
1980 | { | |
1981 | CORE_ADDR entry_pt; | |
1982 | ||
33742334 | 1983 | if (args && *args) |
aa56c716 JK |
1984 | { |
1985 | warning ("\ | |
1986 | Can't pass arguments to remote MIPS board; arguments ignored."); | |
1987 | /* And don't try to use them on the next "run" command. */ | |
1988 | execute_command ("set args", 0); | |
1989 | } | |
33742334 ILT |
1990 | |
1991 | if (execfile == 0 || exec_bfd == 0) | |
aa56c716 | 1992 | error ("No executable file specified"); |
33742334 ILT |
1993 | |
1994 | entry_pt = (CORE_ADDR) bfd_get_start_address (exec_bfd); | |
1995 | ||
1996 | init_wait_for_inferior (); | |
1997 | ||
c2a0f1cb ILT |
1998 | /* FIXME: Should we set inferior_pid here? */ |
1999 | ||
cd10c7e3 | 2000 | /* start-sanitize-gm */ |
188c635f | 2001 | #ifdef GENERAL_MAGIC |
cd10c7e3 SG |
2002 | magic_create_inferior_hook (); |
2003 | proceed (entry_pt, TARGET_SIGNAL_PWR, 0); | |
2004 | #else | |
2005 | /* end-sanitize-gm */ | |
45dc9be3 | 2006 | proceed (entry_pt, TARGET_SIGNAL_DEFAULT, 0); |
cd10c7e3 | 2007 | /* start-sanitize-gm */ |
188c635f | 2008 | #endif /* GENERAL_MAGIC */ |
cd10c7e3 | 2009 | /* end-sanitize-gm */ |
33742334 ILT |
2010 | } |
2011 | ||
2012 | /* Clean up after a process. Actually nothing to do. */ | |
2013 | ||
2014 | static void | |
2015 | mips_mourn_inferior () | |
2016 | { | |
090d784a JSC |
2017 | if (current_ops != NULL) |
2018 | unpush_target (current_ops); | |
33742334 ILT |
2019 | generic_mourn_inferior (); |
2020 | } | |
2021 | \f | |
aa56c716 JK |
2022 | /* We can write a breakpoint and read the shadow contents in one |
2023 | operation. */ | |
2024 | ||
2025 | /* The IDT board uses an unusual breakpoint value, and sometimes gets | |
2026 | confused when it sees the usual MIPS breakpoint instruction. */ | |
2027 | ||
1a406ce8 ILT |
2028 | #define BREAK_INSN (0x00000a0d) |
2029 | #define BREAK_INSN_SIZE (4) | |
aa56c716 JK |
2030 | |
2031 | /* Insert a breakpoint on targets that don't have any better breakpoint | |
2032 | support. We read the contents of the target location and stash it, | |
2033 | then overwrite it with a breakpoint instruction. ADDR is the target | |
2034 | location in the target machine. CONTENTS_CACHE is a pointer to | |
2035 | memory allocated for saving the target contents. It is guaranteed | |
2036 | by the caller to be long enough to save sizeof BREAKPOINT bytes (this | |
2037 | is accomplished via BREAKPOINT_MAX). */ | |
2038 | ||
2039 | static int | |
2040 | mips_insert_breakpoint (addr, contents_cache) | |
2041 | CORE_ADDR addr; | |
2042 | char *contents_cache; | |
2043 | { | |
2044 | int status; | |
2045 | ||
cd10c7e3 SG |
2046 | if (monitor_supports_breakpoints) |
2047 | return common_breakpoint ('B', addr, 0x3, "f"); | |
2048 | ||
1a406ce8 | 2049 | return mips_store_word (addr, BREAK_INSN, contents_cache); |
aa56c716 JK |
2050 | } |
2051 | ||
2052 | static int | |
2053 | mips_remove_breakpoint (addr, contents_cache) | |
2054 | CORE_ADDR addr; | |
2055 | char *contents_cache; | |
2056 | { | |
cd10c7e3 SG |
2057 | if (monitor_supports_breakpoints) |
2058 | return common_breakpoint ('b', addr, 0, NULL); | |
2059 | ||
1a406ce8 | 2060 | return target_write_memory (addr, contents_cache, BREAK_INSN_SIZE); |
aa56c716 | 2061 | } |
4704fd9c | 2062 | |
090d784a JSC |
2063 | #if 0 /* currently not used */ |
2064 | /* PMON does not currently provide support for the debug mode 'b' | |
2065 | commands to manipulate breakpoints. However, if we wanted to use | |
2066 | the monitor breakpoints (rather than the GDB BREAK_INSN version) | |
2067 | then this code performs the work needed to leave debug mode, | |
2068 | set/clear the breakpoint, and then return to debug mode. */ | |
2069 | ||
2070 | #define PMON_MAX_BP (33) /* 32 SW, 1 HW */ | |
2071 | static CORE_ADDR mips_pmon_bp_info[PMON_MAX_BP]; | |
2072 | /* NOTE: The code relies on this vector being zero-initialised by the system */ | |
2073 | ||
2074 | static int | |
2075 | pmon_insert_breakpoint (addr, contents_cache) | |
2076 | CORE_ADDR addr; | |
2077 | char *contents_cache; | |
2078 | { | |
2079 | int status; | |
2080 | ||
2081 | if (monitor_supports_breakpoints) | |
2082 | { | |
2083 | char tbuff[12]; /* space for breakpoint command */ | |
2084 | int bpnum; | |
2085 | CORE_ADDR bpaddr; | |
2086 | ||
2087 | /* PMON does not support debug level breakpoint set/remove: */ | |
2088 | if (mips_exit_debug ()) | |
2089 | mips_error ("Failed to exit debug mode"); | |
2090 | ||
2091 | sprintf (tbuff, "b %08x\015", addr); | |
2092 | mips_send_command (tbuff, 0); | |
2093 | ||
2094 | mips_expect ("Bpt "); | |
2095 | ||
2096 | if (!mips_getstring (tbuff, 2)) | |
2097 | return 1; | |
2098 | tbuff[2] = '\0'; /* terminate the string */ | |
2099 | if (sscanf (tbuff, "%d", &bpnum) != 1) | |
2100 | { | |
2101 | fprintf_unfiltered (stderr, "Invalid decimal breakpoint number from target: %s\n", tbuff); | |
2102 | return 1; | |
2103 | } | |
2104 | ||
2105 | mips_expect (" = "); | |
2106 | ||
2107 | /* Lead in the hex number we are expecting: */ | |
2108 | tbuff[0] = '0'; | |
2109 | tbuff[1] = 'x'; | |
2110 | ||
2111 | if (!mips_getstring (&tbuff[2], 8)) | |
2112 | return 1; | |
2113 | tbuff[10] = '\0'; /* terminate the string */ | |
2114 | ||
2115 | if (sscanf (tbuff, "0x%08x", &bpaddr) != 1) | |
2116 | { | |
2117 | fprintf_unfiltered (stderr, "Invalid hex address from target: %s\n", tbuff); | |
2118 | return 1; | |
2119 | } | |
2120 | ||
2121 | if (bpnum >= PMON_MAX_BP) | |
2122 | { | |
2123 | fprintf_unfiltered (stderr, "Error: Returned breakpoint number %d outside acceptable range (0..%d)\n", | |
2124 | bpnum, PMON_MAX_BP - 1); | |
2125 | return 1; | |
2126 | } | |
2127 | ||
2128 | if (bpaddr != addr) | |
2129 | fprintf_unfiltered (stderr, "Warning: Breakpoint addresses do not match: 0x%x != 0x%x\n", addr, bpaddr); | |
2130 | ||
2131 | mips_pmon_bp_info[bpnum] = bpaddr; | |
2132 | ||
2133 | mips_expect ("\015\012"); | |
2134 | mips_expect (mips_monitor_prompt); | |
2135 | ||
2136 | mips_enter_debug (); | |
2137 | ||
2138 | return 0; | |
2139 | } | |
2140 | ||
2141 | return mips_store_word (addr, BREAK_INSN, contents_cache); | |
2142 | } | |
2143 | ||
2144 | static int | |
2145 | pmon_remove_breakpoint (addr, contents_cache) | |
2146 | CORE_ADDR addr; | |
2147 | char *contents_cache; | |
2148 | { | |
2149 | if (monitor_supports_breakpoints) | |
2150 | { | |
2151 | int bpnum; | |
2152 | char tbuff[7]; /* enough for delete breakpoint command */ | |
2153 | ||
2154 | for (bpnum = 0; bpnum < PMON_MAX_BP; bpnum++) | |
2155 | if (mips_pmon_bp_info[bpnum] == addr) | |
2156 | break; | |
2157 | ||
2158 | if (bpnum >= PMON_MAX_BP) | |
2159 | { | |
2160 | fprintf_unfiltered (stderr, "pmon_remove_breakpoint: Failed to find breakpoint at address 0x%x\n", addr); | |
2161 | return 1; | |
2162 | } | |
2163 | ||
2164 | if (mips_exit_debug ()) | |
2165 | mips_error ("Failed to exit debug mode"); | |
2166 | ||
2167 | sprintf (tbuff, "db %02d\015", bpnum); | |
2168 | ||
2169 | mips_send_command (tbuff, -1); | |
2170 | /* NOTE: If the breakpoint does not exist then a "Bpt <dd> not | |
2171 | set" message will be returned. */ | |
2172 | ||
2173 | mips_enter_debug (); | |
2174 | ||
2175 | return 0; | |
2176 | } | |
2177 | ||
2178 | return target_write_memory (addr, contents_cache, BREAK_INSN_SIZE); | |
2179 | } | |
2180 | #endif | |
2181 | ||
cd10c7e3 SG |
2182 | /* Compute a don't care mask for the region bounding ADDR and ADDR + LEN - 1. |
2183 | This is used for memory ref breakpoints. */ | |
2184 | ||
2185 | static unsigned long | |
2186 | calculate_mask (addr, len) | |
2187 | CORE_ADDR addr; | |
2188 | int len; | |
2189 | { | |
2190 | unsigned long mask; | |
2191 | int i; | |
2192 | ||
2193 | mask = addr ^ (addr + len - 1); | |
2194 | ||
2195 | for (i = 32; i >= 0; i--) | |
2196 | if (mask == 0) | |
2197 | break; | |
2198 | else | |
2199 | mask >>= 1; | |
2200 | ||
2201 | mask = (unsigned long) 0xffffffff >> i; | |
2202 | ||
2203 | return mask; | |
2204 | } | |
2205 | ||
2206 | /* Set a data watchpoint. ADDR and LEN should be obvious. TYPE is either 1 | |
2207 | for a read watchpoint, or 2 for a read/write watchpoint. */ | |
2208 | ||
2209 | int | |
2210 | remote_mips_set_watchpoint (addr, len, type) | |
2211 | CORE_ADDR addr; | |
2212 | int len; | |
2213 | int type; | |
2214 | { | |
2215 | CORE_ADDR first_addr; | |
2216 | unsigned long mask; | |
2217 | char *flags; | |
2218 | ||
2219 | mask = calculate_mask (addr, len); | |
2220 | ||
2221 | first_addr = addr & ~mask; | |
2222 | ||
2223 | switch (type) | |
2224 | { | |
2225 | case 0: /* write */ | |
2226 | flags = "w"; | |
2227 | break; | |
2228 | case 1: /* read */ | |
2229 | flags = "r"; | |
2230 | break; | |
2231 | case 2: /* read/write */ | |
2232 | flags = "rw"; | |
2233 | break; | |
2234 | default: | |
2235 | abort (); | |
2236 | } | |
2237 | ||
2238 | if (common_breakpoint ('B', first_addr, mask, flags)) | |
2239 | return -1; | |
2240 | ||
2241 | return 0; | |
2242 | } | |
2243 | ||
2244 | int | |
2245 | remote_mips_remove_watchpoint (addr, len, type) | |
2246 | CORE_ADDR addr; | |
2247 | int len; | |
2248 | int type; | |
2249 | { | |
2250 | CORE_ADDR first_addr; | |
2251 | unsigned long mask; | |
2252 | ||
2253 | mask = calculate_mask (addr, len); | |
2254 | ||
2255 | first_addr = addr & ~mask; | |
2256 | ||
2257 | if (common_breakpoint ('b', first_addr, 0, NULL)) | |
2258 | return -1; | |
2259 | ||
2260 | return 0; | |
2261 | } | |
2262 | ||
2263 | int | |
2264 | remote_mips_stopped_by_watchpoint () | |
2265 | { | |
2266 | return hit_watchpoint; | |
2267 | } | |
2268 | ||
2269 | /* This routine generates the a breakpoint command of the form: | |
2270 | ||
2271 | 0x0 <CMD> <ADDR> <MASK> <FLAGS> | |
2272 | ||
2273 | Where <CMD> is one of: `B' to set, or `b' to clear a breakpoint. <ADDR> is | |
2274 | the address of the breakpoint. <MASK> is a don't care mask for addresses. | |
2275 | <FLAGS> is any combination of `r', `w', or `f' for read/write/or fetch. */ | |
2276 | ||
2277 | static int | |
2278 | common_breakpoint (cmd, addr, mask, flags) | |
2279 | int cmd; | |
2280 | CORE_ADDR addr; | |
2281 | CORE_ADDR mask; | |
2282 | char *flags; | |
2283 | { | |
2284 | int len; | |
2285 | char buf[DATA_MAXLEN + 1]; | |
2286 | char rcmd; | |
2287 | int rpid, rerrflg, rresponse; | |
2288 | int nfields; | |
2289 | ||
2290 | if (flags) | |
2291 | sprintf (buf, "0x0 %c 0x%x 0x%x %s", cmd, addr, mask, flags); | |
2292 | else | |
2293 | sprintf (buf, "0x0 %c 0x%x", cmd, addr); | |
2294 | ||
2295 | mips_send_packet (buf, 1); | |
2296 | ||
2297 | len = mips_receive_packet (buf, 1, mips_receive_wait); | |
4f005fea | 2298 | buf[len] = '\0'; |
cd10c7e3 SG |
2299 | |
2300 | nfields = sscanf (buf, "0x%x %c 0x%x 0x%x", &rpid, &rcmd, &rerrflg, &rresponse); | |
2301 | ||
2302 | if (nfields != 4 | |
2303 | || rcmd != cmd) | |
2304 | mips_error ("common_breakpoint: Bad response from remote board: %s", buf); | |
2305 | ||
2306 | if (rerrflg != 0) | |
2307 | { | |
3308a107 | 2308 | if (rresponse != 22) /* invalid argument */ |
cd10c7e3 SG |
2309 | fprintf_unfiltered (stderr, "common_breakpoint (0x%x): Got error: 0x%x\n", |
2310 | addr, rresponse); | |
2311 | return 1; | |
2312 | } | |
2313 | ||
2314 | return 0; | |
2315 | } | |
2316 | \f | |
4704fd9c SG |
2317 | static void |
2318 | send_srec (srec, len, addr) | |
2319 | char *srec; | |
2320 | int len; | |
2321 | CORE_ADDR addr; | |
2322 | { | |
2323 | while (1) | |
2324 | { | |
2325 | int ch; | |
2326 | ||
2327 | SERIAL_WRITE (mips_desc, srec, len); | |
2328 | ||
2329 | ch = mips_readchar (2); | |
2330 | ||
2331 | switch (ch) | |
2332 | { | |
2333 | case SERIAL_TIMEOUT: | |
2334 | error ("Timeout during download."); | |
2335 | break; | |
2336 | case 0x6: /* ACK */ | |
2337 | return; | |
2338 | case 0x15: /* NACK */ | |
2339 | fprintf_unfiltered (gdb_stderr, "Download got a NACK at byte %d! Retrying.\n", addr); | |
2340 | continue; | |
2341 | default: | |
2342 | error ("Download got unexpected ack char: 0x%x, retrying.\n", ch); | |
2343 | } | |
2344 | } | |
2345 | } | |
2346 | ||
2347 | /* Download a binary file by converting it to S records. */ | |
2348 | ||
2349 | static void | |
2350 | mips_load_srec (args) | |
2351 | char *args; | |
2352 | { | |
2353 | bfd *abfd; | |
2354 | asection *s; | |
2355 | char *buffer, srec[1024]; | |
2356 | int i; | |
2357 | int srec_frame = 200; | |
2358 | int reclen; | |
2359 | static int hashmark = 1; | |
2360 | ||
2361 | buffer = alloca (srec_frame * 2 + 256); | |
2362 | ||
2363 | abfd = bfd_openr (args, 0); | |
2364 | if (!abfd) | |
2365 | { | |
2366 | printf_filtered ("Unable to open file %s\n", args); | |
2367 | return; | |
2368 | } | |
2369 | ||
2370 | if (bfd_check_format (abfd, bfd_object) == 0) | |
2371 | { | |
2372 | printf_filtered ("File is not an object file\n"); | |
2373 | return; | |
2374 | } | |
4704fd9c | 2375 | |
090d784a JSC |
2376 | /* This actually causes a download in the IDT binary format: */ |
2377 | #define LOAD_CMD "load -b -s tty0\015" | |
2378 | mips_send_command (LOAD_CMD, 0); | |
4704fd9c SG |
2379 | |
2380 | for (s = abfd->sections; s; s = s->next) | |
2381 | { | |
2382 | if (s->flags & SEC_LOAD) | |
2383 | { | |
2384 | int numbytes; | |
2385 | ||
2386 | printf_filtered ("%s\t: 0x%4x .. 0x%4x ", s->name, s->vma, | |
2387 | s->vma + s->_raw_size); | |
2388 | gdb_flush (gdb_stdout); | |
2389 | ||
2390 | for (i = 0; i < s->_raw_size; i += numbytes) | |
2391 | { | |
2392 | numbytes = min (srec_frame, s->_raw_size - i); | |
2393 | ||
2394 | bfd_get_section_contents (abfd, s, buffer, i, numbytes); | |
2395 | ||
2396 | reclen = mips_make_srec (srec, '3', s->vma + i, buffer, numbytes); | |
2397 | send_srec (srec, reclen, s->vma + i); | |
2398 | ||
2399 | if (hashmark) | |
2400 | { | |
2401 | putchar_unfiltered ('#'); | |
2402 | gdb_flush (gdb_stdout); | |
2403 | } | |
2404 | ||
2405 | } /* Per-packet (or S-record) loop */ | |
2406 | ||
2407 | putchar_unfiltered ('\n'); | |
2408 | } /* Loadable sections */ | |
2409 | } | |
2410 | if (hashmark) | |
2411 | putchar_unfiltered ('\n'); | |
2412 | ||
2413 | /* Write a type 7 terminator record. no data for a type 7, and there | |
2414 | is no data, so len is 0. */ | |
2415 | ||
2416 | reclen = mips_make_srec (srec, '7', abfd->start_address, NULL, 0); | |
2417 | ||
2418 | send_srec (srec, reclen, abfd->start_address); | |
2419 | ||
2420 | SERIAL_FLUSH_INPUT (mips_desc); | |
2421 | } | |
2422 | ||
2423 | /* | |
2424 | * mips_make_srec -- make an srecord. This writes each line, one at a | |
2425 | * time, each with it's own header and trailer line. | |
2426 | * An srecord looks like this: | |
2427 | * | |
2428 | * byte count-+ address | |
2429 | * start ---+ | | data +- checksum | |
2430 | * | | | | | |
2431 | * S01000006F6B692D746573742E73726563E4 | |
2432 | * S315000448600000000000000000FC00005900000000E9 | |
2433 | * S31A0004000023C1400037DE00F023604000377B009020825000348D | |
2434 | * S30B0004485A0000000000004E | |
2435 | * S70500040000F6 | |
2436 | * | |
2437 | * S<type><length><address><data><checksum> | |
2438 | * | |
2439 | * Where | |
2440 | * - length | |
2441 | * is the number of bytes following upto the checksum. Note that | |
2442 | * this is not the number of chars following, since it takes two | |
2443 | * chars to represent a byte. | |
2444 | * - type | |
2445 | * is one of: | |
2446 | * 0) header record | |
2447 | * 1) two byte address data record | |
2448 | * 2) three byte address data record | |
2449 | * 3) four byte address data record | |
2450 | * 7) four byte address termination record | |
2451 | * 8) three byte address termination record | |
2452 | * 9) two byte address termination record | |
2453 | * | |
2454 | * - address | |
2455 | * is the start address of the data following, or in the case of | |
2456 | * a termination record, the start address of the image | |
2457 | * - data | |
2458 | * is the data. | |
2459 | * - checksum | |
2460 | * is the sum of all the raw byte data in the record, from the length | |
2461 | * upwards, modulo 256 and subtracted from 255. | |
2462 | * | |
2463 | * This routine returns the length of the S-record. | |
2464 | * | |
2465 | */ | |
2466 | ||
2467 | static int | |
2468 | mips_make_srec (buf, type, memaddr, myaddr, len) | |
2469 | char *buf; | |
cd10c7e3 | 2470 | int type; |
4704fd9c SG |
2471 | CORE_ADDR memaddr; |
2472 | unsigned char *myaddr; | |
2473 | int len; | |
2474 | { | |
2475 | unsigned char checksum; | |
2476 | int i; | |
2477 | ||
2478 | /* Create the header for the srec. addr_size is the number of bytes in the address, | |
2479 | and 1 is the number of bytes in the count. */ | |
2480 | ||
2481 | buf[0] = 'S'; | |
2482 | buf[1] = type; | |
2483 | buf[2] = len + 4 + 1; /* len + 4 byte address + 1 byte checksum */ | |
090d784a JSC |
2484 | /* This assumes S3 style downloads (4byte addresses). There should |
2485 | probably be a check, or the code changed to make it more | |
2486 | explicit. */ | |
4704fd9c SG |
2487 | buf[3] = memaddr >> 24; |
2488 | buf[4] = memaddr >> 16; | |
2489 | buf[5] = memaddr >> 8; | |
2490 | buf[6] = memaddr; | |
2491 | memcpy (&buf[7], myaddr, len); | |
2492 | ||
090d784a JSC |
2493 | /* Note that the checksum is calculated on the raw data, not the |
2494 | hexified data. It includes the length, address and the data | |
2495 | portions of the packet. */ | |
4704fd9c SG |
2496 | checksum = 0; |
2497 | buf += 2; /* Point at length byte */ | |
2498 | for (i = 0; i < len + 4 + 1; i++) | |
2499 | checksum += *buf++; | |
2500 | ||
2501 | *buf = ~checksum; | |
2502 | ||
2503 | return len + 8; | |
2504 | } | |
2505 | ||
090d784a JSC |
2506 | /* The following manifest controls whether we enable the simple flow |
2507 | control support provided by the monitor. If enabled the code will | |
2508 | wait for an affirmative ACK between transmitting packets. */ | |
2509 | #define DOETXACK (1) | |
2510 | ||
2511 | /* The PMON fast-download uses an encoded packet format constructed of | |
2512 | 3byte data packets (encoded as 4 printable ASCII characters), and | |
2513 | escape sequences (preceded by a '/'): | |
2514 | ||
2515 | 'K' clear checksum | |
2516 | 'C' compare checksum (12bit value, not included in checksum calculation) | |
2517 | 'S' define symbol name (for addr) terminated with "," and padded to 4char boundary | |
2518 | 'Z' zero fill multiple of 3bytes | |
2519 | 'B' byte (12bit encoded value, of 8bit data) | |
2520 | 'A' address (36bit encoded value) | |
2521 | 'E' define entry as original address, and exit load | |
2522 | ||
2523 | The packets are processed in 4 character chunks, so the escape | |
2524 | sequences that do not have any data (or variable length data) | |
2525 | should be padded to a 4 character boundary. The decoder will give | |
2526 | an error if the complete message block size is not a multiple of | |
2527 | 4bytes (size of record). | |
2528 | ||
2529 | The encoding of numbers is done in 6bit fields. The 6bit value is | |
2530 | used to index into this string to get the specific character | |
2531 | encoding for the value: */ | |
102f473b | 2532 | static char encoding[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789,."; |
090d784a JSC |
2533 | |
2534 | /* Convert the number of bits required into an encoded number, 6bits | |
2535 | at a time (range 0..63). Keep a checksum if required (passed | |
2536 | pointer non-NULL). The function returns the number of encoded | |
2537 | characters written into the buffer. */ | |
2538 | static int | |
2539 | pmon_makeb64 (v, p, n, chksum) | |
2540 | unsigned long v; | |
2541 | char *p; | |
2542 | int n; | |
2543 | int *chksum; | |
2544 | { | |
2545 | int count = (n / 6); | |
2546 | ||
2547 | if ((n % 12) != 0) { | |
2548 | fprintf_unfiltered(stderr,"Fast encoding bitcount must be a multiple of 12bits: %dbit%s\n",n,(n == 1)?"":"s"); | |
2549 | return(0); | |
2550 | } | |
2551 | if (n > 36) { | |
2552 | fprintf_unfiltered(stderr,"Fast encoding cannot process more than 36bits at the moment: %dbits\n",n); | |
2553 | return(0); | |
2554 | } | |
2555 | ||
2556 | /* Deal with the checksum: */ | |
2557 | if (chksum != NULL) { | |
2558 | switch (n) { | |
2559 | case 36: *chksum += ((v >> 24) & 0xFFF); | |
2560 | case 24: *chksum += ((v >> 12) & 0xFFF); | |
2561 | case 12: *chksum += ((v >> 0) & 0xFFF); | |
2562 | } | |
2563 | } | |
2564 | ||
2565 | do { | |
2566 | n -= 6; | |
2567 | *p++ = encoding[(v >> n) & 0x3F]; | |
2568 | } while (n > 0); | |
2569 | ||
2570 | return(count); | |
2571 | } | |
2572 | ||
2573 | /* Shorthand function (that could be in-lined) to output the zero-fill | |
2574 | escape sequence into the data stream. */ | |
2575 | static int | |
2576 | pmon_zeroset (recsize, buff, amount, chksum) | |
2577 | int recsize; | |
2578 | char **buff; | |
2579 | int *amount; | |
2580 | unsigned int *chksum; | |
2581 | { | |
2582 | int count; | |
2583 | ||
2584 | sprintf(*buff,"/Z"); | |
2585 | count = pmon_makeb64 (*amount, (*buff + 2), 12, chksum); | |
2586 | *buff += (count + 2); | |
2587 | *amount = 0; | |
2588 | return(recsize + count + 2); | |
2589 | } | |
2590 | ||
2591 | static int | |
2592 | pmon_checkset (recsize, buff, value) | |
2593 | int recsize; | |
2594 | char **buff; | |
2595 | int *value; | |
2596 | { | |
2597 | int count; | |
2598 | ||
2599 | /* Add the checksum (without updating the value): */ | |
2600 | sprintf (*buff, "/C"); | |
2601 | count = pmon_makeb64 (*value, (*buff + 2), 12, NULL); | |
2602 | *buff += (count + 2); | |
2603 | sprintf (*buff, "\015"); | |
2604 | *buff += 2; /* include zero terminator */ | |
2605 | /* Forcing a checksum validation clears the sum: */ | |
2606 | *value = 0; | |
2607 | return(recsize + count + 3); | |
2608 | } | |
2609 | ||
2610 | /* Amount of padding we leave after at the end of the output buffer, | |
2611 | for the checksum and line termination characters: */ | |
2612 | #define CHECKSIZE (4 + 4 + 4 + 2) | |
2613 | /* zero-fill, checksum, transfer end and line termination space. */ | |
2614 | ||
2615 | /* The amount of binary data loaded from the object file in a single | |
2616 | operation: */ | |
2617 | #define BINCHUNK (1024) | |
2618 | ||
2619 | /* Maximum line of data accepted by the monitor: */ | |
2620 | #define MAXRECSIZE (550) | |
2621 | /* NOTE: This constant depends on the monitor being used. This value | |
2622 | is for PMON 5.x on the Cogent Vr4300 board. */ | |
2623 | ||
2624 | static void | |
2625 | pmon_make_fastrec (outbuf, inbuf, inptr, inamount, recsize, csum, zerofill) | |
2626 | char **outbuf; | |
2627 | unsigned char *inbuf; | |
2628 | int *inptr; | |
2629 | int inamount; | |
2630 | int *recsize; | |
2631 | unsigned int *csum; | |
2632 | unsigned int *zerofill; | |
2633 | { | |
2634 | int count = 0; | |
2635 | char *p = *outbuf; | |
2636 | ||
2637 | /* This is a simple check to ensure that our data will fit within | |
2638 | the maximum allowable record size. Each record output is 4bytes | |
2639 | in length. We must allow space for a pending zero fill command, | |
2640 | the record, and a checksum record. */ | |
2641 | while ((*recsize < (MAXRECSIZE - CHECKSIZE)) && ((inamount - *inptr) > 0)) { | |
2642 | /* Process the binary data: */ | |
2643 | if ((inamount - *inptr) < 3) { | |
2644 | if (*zerofill != 0) | |
2645 | *recsize = pmon_zeroset (*recsize, &p, zerofill, csum); | |
2646 | sprintf (p, "/B"); | |
2647 | count = pmon_makeb64 (inbuf[*inptr], &p[2], 12, csum); | |
2648 | p += (2 + count); | |
2649 | *recsize += (2 + count); | |
2650 | (*inptr)++; | |
2651 | } else { | |
2652 | unsigned int value = ((inbuf[*inptr + 0] << 16) | (inbuf[*inptr + 1] << 8) | inbuf[*inptr + 2]); | |
2653 | /* Simple check for zero data. TODO: A better check would be | |
2654 | to check the last, and then the middle byte for being zero | |
2655 | (if the first byte is not). We could then check for | |
2656 | following runs of zeros, and if above a certain size it is | |
2657 | worth the 4 or 8 character hit of the byte insertions used | |
2658 | to pad to the start of the zeroes. NOTE: This also depends | |
2659 | on the alignment at the end of the zero run. */ | |
2660 | if (value == 0x00000000) { | |
2661 | (*zerofill)++; | |
2662 | if (*zerofill == 0xFFF) /* 12bit counter */ | |
2663 | *recsize = pmon_zeroset (*recsize, &p, zerofill, csum); | |
2664 | }else { | |
2665 | if (*zerofill != 0) | |
2666 | *recsize = pmon_zeroset (*recsize, &p, zerofill, csum); | |
2667 | count = pmon_makeb64 (value, p, 24, csum); | |
2668 | p += count; | |
2669 | *recsize += count; | |
2670 | } | |
2671 | *inptr += 3; | |
2672 | } | |
2673 | } | |
2674 | ||
2675 | *outbuf = p; | |
2676 | return; | |
2677 | } | |
2678 | ||
2679 | #if defined(DOETXACK) | |
2680 | static int | |
2681 | pmon_check_ack() | |
2682 | { | |
2683 | int c = SERIAL_READCHAR (mips_desc, 2); | |
2684 | if ((c == SERIAL_TIMEOUT) || (c != 0x06)) { | |
4f005fea | 2685 | fprintf_unfiltered (gdb_stderr, "Failed to receive valid ACK\n"); |
090d784a JSC |
2686 | return(-1); /* terminate the download */ |
2687 | } | |
2688 | return(0); | |
2689 | } | |
2690 | #endif /* DOETXACK */ | |
2691 | ||
2692 | static void | |
2693 | pmon_load_fast (file) | |
2694 | char *file; | |
2695 | { | |
2696 | bfd *abfd; | |
2697 | asection *s; | |
2698 | unsigned char *binbuf; | |
2699 | char *buffer; | |
2700 | int reclen; | |
2701 | unsigned int csum = 0; | |
2702 | static int hashmark = 1; | |
2703 | int bintotal = 0; | |
2704 | int final; | |
2705 | int finished = 0; | |
2706 | ||
c37c7c6c FF |
2707 | buffer = (char *)xmalloc(MAXRECSIZE + 1); |
2708 | binbuf = (unsigned char *)xmalloc(BINCHUNK); | |
090d784a JSC |
2709 | |
2710 | abfd = bfd_openr(file,0); | |
2711 | if (!abfd) | |
2712 | { | |
2713 | printf_filtered ("Unable to open file %s\n",file); | |
2714 | return; | |
2715 | } | |
2716 | ||
2717 | if (bfd_check_format(abfd,bfd_object) == 0) | |
2718 | { | |
2719 | printf_filtered("File is not an object file\n"); | |
2720 | return; | |
2721 | } | |
2722 | ||
2723 | /* Setup the required download state: */ | |
2724 | mips_send_command ("set dlproto etxack\015", -1); | |
2725 | mips_send_command ("set dlecho off\015", -1); | |
2726 | /* NOTE: We get a "cannot set variable" message if the variable is | |
2727 | already defined to have the argument we give. The code doesn't | |
2728 | care, since it just scans to the next prompt anyway. */ | |
2729 | /* Start the download: */ | |
2730 | mips_send_command (LOAD_CMD, 0); | |
2731 | mips_expect ("Downloading from tty0, ^C to abort\015\012"); | |
2732 | ||
2733 | /* Zero the checksum */ | |
2734 | sprintf(buffer,"/Kxx\015"); | |
2735 | reclen = strlen(buffer); | |
2736 | SERIAL_WRITE (mips_desc, buffer, reclen); | |
2737 | ||
2738 | #if defined(DOETXACK) | |
2739 | finished = pmon_check_ack(); | |
2740 | #endif /* DOETXACK */ | |
2741 | ||
2742 | for (s = abfd->sections; s && !finished; s = s->next) | |
2743 | if (s->flags & SEC_LOAD) /* only deal with loadable sections */ | |
2744 | { | |
2745 | bintotal += s->_raw_size; | |
2746 | final = (s->vma + s->_raw_size); | |
2747 | ||
2748 | printf_filtered ("%s\t: 0x%4x .. 0x%4x ", s->name, s->vma, | |
2749 | s->vma + s->_raw_size); | |
2750 | gdb_flush (gdb_stdout); | |
2751 | ||
2752 | /* Output the starting address */ | |
2753 | sprintf(buffer,"/A"); | |
2754 | reclen = pmon_makeb64(s->vma,&buffer[2],36,&csum); | |
2755 | buffer[2 + reclen] = '\015'; | |
2756 | buffer[3 + reclen] = '\0'; | |
2757 | reclen += 3; /* for the initial escape code and carriage return */ | |
2758 | SERIAL_WRITE (mips_desc, buffer, reclen); | |
2759 | #if defined(DOETXACK) | |
2760 | finished = pmon_check_ack(); | |
2761 | #endif /* DOETXACK */ | |
2762 | ||
2763 | if (!finished) | |
2764 | { | |
2765 | int binamount; | |
2766 | unsigned int zerofill = 0; | |
2767 | char *bp = buffer; | |
2768 | int i; | |
2769 | ||
2770 | reclen = 0; | |
2771 | ||
2772 | for (i = 0; ((i < s->_raw_size) && !finished); i += binamount) { | |
2773 | int binptr = 0; | |
2774 | ||
2775 | binamount = min (BINCHUNK, s->_raw_size - i); | |
2776 | ||
2777 | bfd_get_section_contents (abfd, s, binbuf, i, binamount); | |
2778 | ||
2779 | /* This keeps a rolling checksum, until we decide to output | |
2780 | the line: */ | |
2781 | for (; ((binamount - binptr) > 0);) { | |
2782 | pmon_make_fastrec (&bp, binbuf, &binptr, binamount, &reclen, &csum, &zerofill); | |
2783 | if (reclen >= (MAXRECSIZE - CHECKSIZE)) { | |
2784 | reclen = pmon_checkset (reclen, &bp, &csum); | |
2785 | SERIAL_WRITE (mips_desc, buffer, reclen); | |
2786 | #if defined(DOETXACK) | |
2787 | finished = pmon_check_ack(); | |
2788 | if (finished) { | |
2789 | zerofill = 0; /* do not transmit pending zerofills */ | |
2790 | break; | |
2791 | } | |
2792 | #endif /* DOETXACK */ | |
2793 | ||
2794 | if (hashmark) { | |
2795 | putchar_unfiltered ('#'); | |
2796 | gdb_flush (gdb_stdout); | |
2797 | } | |
2798 | ||
2799 | bp = buffer; | |
2800 | reclen = 0; /* buffer processed */ | |
2801 | } | |
2802 | } | |
2803 | } | |
2804 | ||
2805 | /* Ensure no out-standing zerofill requests: */ | |
2806 | if (zerofill != 0) | |
2807 | reclen = pmon_zeroset (reclen, &bp, &zerofill, &csum); | |
2808 | ||
2809 | /* and then flush the line: */ | |
2810 | if (reclen > 0) { | |
2811 | reclen = pmon_checkset (reclen, &bp, &csum); | |
2812 | /* Currently pmon_checkset outputs the line terminator by | |
2813 | default, so we write out the buffer so far: */ | |
2814 | SERIAL_WRITE (mips_desc, buffer, reclen); | |
2815 | #if defined(DOETXACK) | |
2816 | finished = pmon_check_ack(); | |
2817 | #endif /* DOETXACK */ | |
2818 | } | |
2819 | } | |
2820 | ||
2821 | if (hashmark) | |
2822 | putchar_unfiltered ('\n'); | |
2823 | } | |
2824 | ||
2825 | /* Terminate the transfer. We know that we have an empty output | |
2826 | buffer at this point. */ | |
2827 | sprintf (buffer, "/E/E\015"); /* include dummy padding characters */ | |
2828 | reclen = strlen (buffer); | |
2829 | SERIAL_WRITE (mips_desc, buffer, reclen); | |
2830 | ||
2831 | if (finished) { /* Ignore the termination message: */ | |
2832 | SERIAL_FLUSH_INPUT (mips_desc); | |
2833 | } else { /* Deal with termination message: */ | |
2834 | char hexnumber[9]; /* includes '\0' space */ | |
2835 | mips_expect ("Entry Address = "); | |
2836 | sprintf(hexnumber,"%x",final); | |
2837 | mips_expect (hexnumber); | |
2838 | #if defined(DOETXACK) | |
2839 | mips_expect ("\015\012\006\015\012total = 0x"); | |
2840 | #else /* normal termination */ | |
2841 | mips_expect ("\015\012\015\012total = 0x"); | |
2842 | #endif /* !DOETXACK */ | |
2843 | sprintf(hexnumber,"%x",bintotal); | |
2844 | mips_expect (hexnumber); | |
2845 | mips_expect (" bytes\015\012"); | |
2846 | } | |
2847 | ||
2848 | return; | |
2849 | } | |
2850 | ||
4704fd9c SG |
2851 | /* mips_load -- download a file. */ |
2852 | ||
2853 | static void | |
2854 | mips_load (file, from_tty) | |
2855 | char *file; | |
2856 | int from_tty; | |
2857 | { | |
4704fd9c | 2858 | /* Get the board out of remote debugging mode. */ |
090d784a | 2859 | if (mips_exit_debug ()) |
4704fd9c SG |
2860 | error ("mips_load: Couldn't get into monitor mode."); |
2861 | ||
090d784a JSC |
2862 | if (mips_monitor == MON_PMON) |
2863 | pmon_load_fast (file); | |
2864 | else | |
2865 | mips_load_srec (file); | |
4704fd9c | 2866 | |
4704fd9c SG |
2867 | mips_initialize (); |
2868 | ||
2869 | /* Finally, make the PC point at the start address */ | |
2870 | ||
2871 | if (exec_bfd) | |
2872 | write_pc (bfd_get_start_address (exec_bfd)); | |
2873 | ||
2874 | inferior_pid = 0; /* No process now */ | |
2875 | ||
2876 | /* This is necessary because many things were based on the PC at the time that | |
2877 | we attached to the monitor, which is no longer valid now that we have loaded | |
2878 | new code (and just changed the PC). Another way to do this might be to call | |
2879 | normal_stop, except that the stack may not be valid, and things would get | |
2880 | horribly confused... */ | |
2881 | ||
2882 | clear_symtab_users (); | |
2883 | } | |
aa56c716 | 2884 | \f |
33742334 ILT |
2885 | /* The target vector. */ |
2886 | ||
2887 | struct target_ops mips_ops = | |
2888 | { | |
2889 | "mips", /* to_shortname */ | |
2890 | "Remote MIPS debugging over serial line", /* to_longname */ | |
796d1fd3 JK |
2891 | "\ |
2892 | Debug a board using the MIPS remote debugging protocol over a serial line.\n\ | |
2893 | The argument is the device it is connected to or, if it contains a colon,\n\ | |
2894 | HOST:PORT to access a board over a network", /* to_doc */ | |
33742334 ILT |
2895 | mips_open, /* to_open */ |
2896 | mips_close, /* to_close */ | |
2897 | NULL, /* to_attach */ | |
2898 | mips_detach, /* to_detach */ | |
2899 | mips_resume, /* to_resume */ | |
2900 | mips_wait, /* to_wait */ | |
2901 | mips_fetch_registers, /* to_fetch_registers */ | |
2902 | mips_store_registers, /* to_store_registers */ | |
2903 | mips_prepare_to_store, /* to_prepare_to_store */ | |
2904 | mips_xfer_memory, /* to_xfer_memory */ | |
2905 | mips_files_info, /* to_files_info */ | |
aa56c716 JK |
2906 | mips_insert_breakpoint, /* to_insert_breakpoint */ |
2907 | mips_remove_breakpoint, /* to_remove_breakpoint */ | |
33742334 ILT |
2908 | NULL, /* to_terminal_init */ |
2909 | NULL, /* to_terminal_inferior */ | |
2910 | NULL, /* to_terminal_ours_for_output */ | |
2911 | NULL, /* to_terminal_ours */ | |
2912 | NULL, /* to_terminal_info */ | |
c2a0f1cb | 2913 | mips_kill, /* to_kill */ |
4704fd9c | 2914 | mips_load, /* to_load */ |
33742334 ILT |
2915 | NULL, /* to_lookup_symbol */ |
2916 | mips_create_inferior, /* to_create_inferior */ | |
2917 | mips_mourn_inferior, /* to_mourn_inferior */ | |
2918 | NULL, /* to_can_run */ | |
2919 | NULL, /* to_notice_signals */ | |
43fc25c8 | 2920 | 0, /* to_thread_alive */ |
78b459a7 | 2921 | 0, /* to_stop */ |
33742334 ILT |
2922 | process_stratum, /* to_stratum */ |
2923 | NULL, /* to_next */ | |
2924 | 1, /* to_has_all_memory */ | |
2925 | 1, /* to_has_memory */ | |
2926 | 1, /* to_has_stack */ | |
2927 | 1, /* to_has_registers */ | |
2928 | 1, /* to_has_execution */ | |
2929 | NULL, /* sections */ | |
2930 | NULL, /* sections_end */ | |
2931 | OPS_MAGIC /* to_magic */ | |
2932 | }; | |
2933 | \f | |
090d784a JSC |
2934 | /* An alternative target vector: */ |
2935 | struct target_ops pmon_ops = | |
2936 | { | |
2937 | "pmon", /* to_shortname */ | |
2938 | "Remote MIPS debugging over serial line", /* to_longname */ | |
2939 | "\ | |
2940 | Debug a board using the PMON MIPS remote debugging protocol over a serial\n\ | |
2941 | line. The argument is the device it is connected to or, if it contains a\n\ | |
2942 | colon, HOST:PORT to access a board over a network", /* to_doc */ | |
2943 | pmon_open, /* to_open */ | |
2944 | mips_close, /* to_close */ | |
2945 | NULL, /* to_attach */ | |
2946 | mips_detach, /* to_detach */ | |
2947 | mips_resume, /* to_resume */ | |
2948 | pmon_wait, /* to_wait */ | |
2949 | mips_fetch_registers, /* to_fetch_registers */ | |
2950 | mips_store_registers, /* to_store_registers */ | |
2951 | mips_prepare_to_store, /* to_prepare_to_store */ | |
2952 | mips_xfer_memory, /* to_xfer_memory */ | |
2953 | mips_files_info, /* to_files_info */ | |
2954 | mips_insert_breakpoint, /* to_insert_breakpoint */ | |
2955 | mips_remove_breakpoint, /* to_remove_breakpoint */ | |
2956 | NULL, /* to_terminal_init */ | |
2957 | NULL, /* to_terminal_inferior */ | |
2958 | NULL, /* to_terminal_ours_for_output */ | |
2959 | NULL, /* to_terminal_ours */ | |
2960 | NULL, /* to_terminal_info */ | |
2961 | mips_kill, /* to_kill */ | |
2962 | mips_load, /* to_load */ | |
2963 | NULL, /* to_lookup_symbol */ | |
2964 | mips_create_inferior, /* to_create_inferior */ | |
2965 | mips_mourn_inferior, /* to_mourn_inferior */ | |
2966 | NULL, /* to_can_run */ | |
2967 | NULL, /* to_notice_signals */ | |
2968 | 0, /* to_thread_alive */ | |
2969 | 0, /* to_stop */ | |
2970 | process_stratum, /* to_stratum */ | |
2971 | NULL, /* to_next */ | |
2972 | 1, /* to_has_all_memory */ | |
2973 | 1, /* to_has_memory */ | |
2974 | 1, /* to_has_stack */ | |
2975 | 1, /* to_has_registers */ | |
2976 | 1, /* to_has_execution */ | |
2977 | NULL, /* sections */ | |
2978 | NULL, /* sections_end */ | |
2979 | OPS_MAGIC /* to_magic */ | |
2980 | }; | |
2981 | \f | |
33742334 ILT |
2982 | void |
2983 | _initialize_remote_mips () | |
2984 | { | |
2985 | add_target (&mips_ops); | |
090d784a | 2986 | add_target (&pmon_ops); |
33742334 | 2987 | |
0907dc09 ILT |
2988 | add_show_from_set ( |
2989 | add_set_cmd ("timeout", no_class, var_zinteger, | |
2990 | (char *) &mips_receive_wait, | |
2991 | "Set timeout in seconds for remote MIPS serial I/O.", | |
2992 | &setlist), | |
2993 | &showlist); | |
2994 | ||
2995 | add_show_from_set ( | |
2996 | add_set_cmd ("retransmit-timeout", no_class, var_zinteger, | |
2997 | (char *) &mips_retransmit_wait, | |
2998 | "Set retransmit timeout in seconds for remote MIPS serial I/O.\n\ | |
2999 | This is the number of seconds to wait for an acknowledgement to a packet\n\ | |
3000 | before resending the packet.", &setlist), | |
3001 | &showlist); | |
4c5bc9f4 SG |
3002 | |
3003 | add_show_from_set ( | |
3004 | add_set_cmd ("syn-garbage-limit", no_class, var_zinteger, | |
3005 | (char *) &mips_syn_garbage, | |
3006 | "Set the maximum number of characters to ignore when scanning for a SYN.\n\ | |
3007 | This is the maximum number of characters GDB will ignore when trying to\n\ | |
3008 | synchronize with the remote system. A value of -1 means that there is no limit\n\ | |
3009 | (Note that these characters are printed out even though they are ignored.)", | |
3010 | &setlist), | |
3011 | &showlist); | |
33742334 | 3012 | } |