Commit | Line | Data |
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c906108c | 1 | /* Remote debugging interface for MIPS remote debugging protocol. |
0a65a603 | 2 | |
ecd75fc8 | 3 | Copyright (C) 1993-2014 Free Software Foundation, Inc. |
0a65a603 | 4 | |
c906108c SS |
5 | Contributed by Cygnus Support. Written by Ian Lance Taylor |
6 | <ian@cygnus.com>. | |
7 | ||
c5aa993b | 8 | This file is part of GDB. |
c906108c | 9 | |
c5aa993b JM |
10 | This program is free software; you can redistribute it and/or modify |
11 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 12 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 13 | (at your option) any later version. |
c906108c | 14 | |
c5aa993b JM |
15 | This program is distributed in the hope that it will be useful, |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
c906108c | 19 | |
c5aa993b | 20 | You should have received a copy of the GNU General Public License |
a9762ec7 | 21 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
22 | |
23 | #include "defs.h" | |
24 | #include "inferior.h" | |
45741a9c | 25 | #include "infrun.h" |
c906108c SS |
26 | #include "bfd.h" |
27 | #include "symfile.h" | |
c906108c SS |
28 | #include "gdbcmd.h" |
29 | #include "gdbcore.h" | |
30 | #include "serial.h" | |
31 | #include "target.h" | |
60250e8b | 32 | #include "exceptions.h" |
53ce3c39 | 33 | #include <sys/stat.h> |
6023c606 | 34 | #include "gdb_usleep.h" |
4e052eda | 35 | #include "regcache.h" |
59d521c1 | 36 | #include <ctype.h> |
56cea623 | 37 | #include "mips-tdep.h" |
8eeafb51 | 38 | #include "gdbthread.h" |
cbb099e8 | 39 | #include "gdb_bfd.h" |
c906108c | 40 | \f |
c5aa993b | 41 | |
c906108c SS |
42 | /* Breakpoint types. Values 0, 1, and 2 must agree with the watch |
43 | types passed by breakpoint.c to target_insert_watchpoint. | |
44 | Value 3 is our own invention, and is used for ordinary instruction | |
45 | breakpoints. Value 4 is used to mark an unused watchpoint in tables. */ | |
c5aa993b JM |
46 | enum break_type |
47 | { | |
48 | BREAK_WRITE, /* 0 */ | |
49 | BREAK_READ, /* 1 */ | |
50 | BREAK_ACCESS, /* 2 */ | |
51 | BREAK_FETCH, /* 3 */ | |
52 | BREAK_UNUSED /* 4 */ | |
53 | }; | |
c906108c SS |
54 | |
55 | /* Prototypes for local functions. */ | |
56 | ||
a14ed312 | 57 | static int mips_readchar (int timeout); |
c906108c | 58 | |
a14ed312 KB |
59 | static int mips_receive_header (unsigned char *hdr, int *pgarbage, |
60 | int ch, int timeout); | |
c906108c | 61 | |
a14ed312 KB |
62 | static int mips_receive_trailer (unsigned char *trlr, int *pgarbage, |
63 | int *pch, int timeout); | |
c906108c | 64 | |
a14ed312 | 65 | static int mips_cksum (const unsigned char *hdr, |
ce6ec7d8 | 66 | const char *data, int len); |
c906108c | 67 | |
a14ed312 | 68 | static void mips_send_packet (const char *s, int get_ack); |
c906108c | 69 | |
a14ed312 | 70 | static void mips_send_command (const char *cmd, int prompt); |
c906108c | 71 | |
a14ed312 | 72 | static int mips_receive_packet (char *buff, int throw_error, int timeout); |
c906108c | 73 | |
4014092b AC |
74 | static ULONGEST mips_request (int cmd, ULONGEST addr, ULONGEST data, |
75 | int *perr, int timeout, char *buff); | |
c906108c | 76 | |
a14ed312 | 77 | static void mips_initialize (void); |
c906108c | 78 | |
de90e03d | 79 | static void mips_close (struct target_ops *self); |
c906108c | 80 | |
74ed0bb4 | 81 | static int mips_map_regno (struct gdbarch *, int); |
c906108c | 82 | |
bbd2783e KB |
83 | static void mips_set_register (int regno, ULONGEST value); |
84 | ||
f32dbf8c MM |
85 | static void mips_prepare_to_store (struct target_ops *self, |
86 | struct regcache *regcache); | |
c906108c | 87 | |
8cfa2c71 | 88 | static int mips_fetch_word (CORE_ADDR addr, unsigned int *valp); |
c906108c | 89 | |
a14ed312 | 90 | static int mips_store_word (CORE_ADDR addr, unsigned int value, |
e17a4113 | 91 | int *old_contents); |
c906108c | 92 | |
6df1b29f PA |
93 | static enum target_xfer_status mips_xfer_memory (gdb_byte *readbuf, |
94 | const gdb_byte *writebuf, | |
95 | ULONGEST memaddr, | |
96 | ULONGEST len, | |
97 | ULONGEST *xfered_len); | |
c906108c | 98 | |
a14ed312 | 99 | static void mips_files_info (struct target_ops *ignore); |
c906108c | 100 | |
383c0389 | 101 | static void mips_mourn_inferior (struct target_ops *ops); |
c906108c | 102 | |
ce6ec7d8 | 103 | static int pmon_makeb64 (unsigned long v, char *p, int n, unsigned int *chksum); |
c906108c | 104 | |
ce6ec7d8 | 105 | static int pmon_zeroset (int recsize, char **buff, unsigned int *amount, |
a14ed312 | 106 | unsigned int *chksum); |
c906108c | 107 | |
ce6ec7d8 | 108 | static int pmon_checkset (int recsize, char **buff, unsigned int *value); |
c906108c | 109 | |
a14ed312 KB |
110 | static void pmon_make_fastrec (char **outbuf, unsigned char *inbuf, |
111 | int *inptr, int inamount, int *recsize, | |
112 | unsigned int *csum, unsigned int *zerofill); | |
c906108c | 113 | |
a14ed312 | 114 | static int pmon_check_ack (char *mesg); |
c906108c | 115 | |
a14ed312 | 116 | static void pmon_start_download (void); |
c906108c | 117 | |
a14ed312 | 118 | static void pmon_end_download (int final, int bintotal); |
c906108c | 119 | |
a14ed312 | 120 | static void pmon_download (char *buffer, int length); |
c906108c | 121 | |
9cbe5fff | 122 | static void mips_load (struct target_ops *self, const char *file, int from_tty); |
c906108c | 123 | |
a14ed312 KB |
124 | static int mips_make_srec (char *buffer, int type, CORE_ADDR memaddr, |
125 | unsigned char *myaddr, int len); | |
c906108c | 126 | |
06b1d59c | 127 | static int mips_set_breakpoint (CORE_ADDR addr, int len, enum break_type type); |
c906108c | 128 | |
06b1d59c MR |
129 | static int mips_clear_breakpoint (CORE_ADDR addr, int len, |
130 | enum break_type type); | |
c906108c | 131 | |
06b1d59c MR |
132 | static int mips_common_breakpoint (int set, CORE_ADDR addr, int len, |
133 | enum break_type type); | |
c906108c SS |
134 | |
135 | /* Forward declarations. */ | |
136 | extern struct target_ops mips_ops; | |
137 | extern struct target_ops pmon_ops; | |
138 | extern struct target_ops ddb_ops; | |
bbd2783e | 139 | extern struct target_ops rockhopper_ops; |
c5aa993b | 140 | \f/* *INDENT-OFF* */ |
c906108c SS |
141 | /* The MIPS remote debugging interface is built on top of a simple |
142 | packet protocol. Each packet is organized as follows: | |
143 | ||
c5aa993b JM |
144 | SYN The first character is always a SYN (ASCII 026, or ^V). SYN |
145 | may not appear anywhere else in the packet. Any time a SYN is | |
146 | seen, a new packet should be assumed to have begun. | |
c906108c SS |
147 | |
148 | TYPE_LEN | |
c5aa993b JM |
149 | This byte contains the upper five bits of the logical length |
150 | of the data section, plus a single bit indicating whether this | |
151 | is a data packet or an acknowledgement. The documentation | |
152 | indicates that this bit is 1 for a data packet, but the actual | |
153 | board uses 1 for an acknowledgement. The value of the byte is | |
154 | 0x40 + (ack ? 0x20 : 0) + (len >> 6) | |
155 | (we always have 0 <= len < 1024). Acknowledgement packets do | |
156 | not carry data, and must have a data length of 0. | |
c906108c SS |
157 | |
158 | LEN1 This byte contains the lower six bits of the logical length of | |
c5aa993b JM |
159 | the data section. The value is |
160 | 0x40 + (len & 0x3f) | |
161 | ||
162 | SEQ This byte contains the six bit sequence number of the packet. | |
163 | The value is | |
164 | 0x40 + seq | |
165 | An acknowlegment packet contains the sequence number of the | |
166 | packet being acknowledged plus 1 modulo 64. Data packets are | |
167 | transmitted in sequence. There may only be one outstanding | |
168 | unacknowledged data packet at a time. The sequence numbers | |
169 | are independent in each direction. If an acknowledgement for | |
170 | the previous packet is received (i.e., an acknowledgement with | |
171 | the sequence number of the packet just sent) the packet just | |
172 | sent should be retransmitted. If no acknowledgement is | |
173 | received within a timeout period, the packet should be | |
174 | retransmitted. This has an unfortunate failure condition on a | |
175 | high-latency line, as a delayed acknowledgement may lead to an | |
176 | endless series of duplicate packets. | |
177 | ||
178 | DATA The actual data bytes follow. The following characters are | |
179 | escaped inline with DLE (ASCII 020, or ^P): | |
180 | SYN (026) DLE S | |
181 | DLE (020) DLE D | |
182 | ^C (003) DLE C | |
183 | ^S (023) DLE s | |
184 | ^Q (021) DLE q | |
185 | The additional DLE characters are not counted in the logical | |
186 | length stored in the TYPE_LEN and LEN1 bytes. | |
c906108c SS |
187 | |
188 | CSUM1 | |
189 | CSUM2 | |
190 | CSUM3 | |
c5aa993b JM |
191 | These bytes contain an 18 bit checksum of the complete |
192 | contents of the packet excluding the SEQ byte and the | |
193 | CSUM[123] bytes. The checksum is simply the twos complement | |
194 | addition of all the bytes treated as unsigned characters. The | |
195 | values of the checksum bytes are: | |
196 | CSUM1: 0x40 + ((cksum >> 12) & 0x3f) | |
197 | CSUM2: 0x40 + ((cksum >> 6) & 0x3f) | |
198 | CSUM3: 0x40 + (cksum & 0x3f) | |
c906108c SS |
199 | |
200 | It happens that the MIPS remote debugging protocol always | |
201 | communicates with ASCII strings. Because of this, this | |
202 | implementation doesn't bother to handle the DLE quoting mechanism, | |
203 | since it will never be required. */ | |
9846de1b | 204 | /* *INDENT-ON* */ |
c906108c | 205 | |
c5aa993b | 206 | |
c906108c SS |
207 | /* The SYN character which starts each packet. */ |
208 | #define SYN '\026' | |
209 | ||
210 | /* The 0x40 used to offset each packet (this value ensures that all of | |
211 | the header and trailer bytes, other than SYN, are printable ASCII | |
212 | characters). */ | |
213 | #define HDR_OFFSET 0x40 | |
214 | ||
215 | /* The indices of the bytes in the packet header. */ | |
216 | #define HDR_INDX_SYN 0 | |
217 | #define HDR_INDX_TYPE_LEN 1 | |
218 | #define HDR_INDX_LEN1 2 | |
219 | #define HDR_INDX_SEQ 3 | |
220 | #define HDR_LENGTH 4 | |
221 | ||
222 | /* The data/ack bit in the TYPE_LEN header byte. */ | |
223 | #define TYPE_LEN_DA_BIT 0x20 | |
224 | #define TYPE_LEN_DATA 0 | |
225 | #define TYPE_LEN_ACK TYPE_LEN_DA_BIT | |
226 | ||
227 | /* How to compute the header bytes. */ | |
228 | #define HDR_SET_SYN(data, len, seq) (SYN) | |
229 | #define HDR_SET_TYPE_LEN(data, len, seq) \ | |
230 | (HDR_OFFSET \ | |
231 | + ((data) ? TYPE_LEN_DATA : TYPE_LEN_ACK) \ | |
232 | + (((len) >> 6) & 0x1f)) | |
233 | #define HDR_SET_LEN1(data, len, seq) (HDR_OFFSET + ((len) & 0x3f)) | |
234 | #define HDR_SET_SEQ(data, len, seq) (HDR_OFFSET + (seq)) | |
235 | ||
236 | /* Check that a header byte is reasonable. */ | |
237 | #define HDR_CHECK(ch) (((ch) & HDR_OFFSET) == HDR_OFFSET) | |
238 | ||
239 | /* Get data from the header. These macros evaluate their argument | |
240 | multiple times. */ | |
241 | #define HDR_IS_DATA(hdr) \ | |
242 | (((hdr)[HDR_INDX_TYPE_LEN] & TYPE_LEN_DA_BIT) == TYPE_LEN_DATA) | |
243 | #define HDR_GET_LEN(hdr) \ | |
244 | ((((hdr)[HDR_INDX_TYPE_LEN] & 0x1f) << 6) + (((hdr)[HDR_INDX_LEN1] & 0x3f))) | |
245 | #define HDR_GET_SEQ(hdr) ((unsigned int)(hdr)[HDR_INDX_SEQ] & 0x3f) | |
246 | ||
247 | /* The maximum data length. */ | |
248 | #define DATA_MAXLEN 1023 | |
249 | ||
250 | /* The trailer offset. */ | |
251 | #define TRLR_OFFSET HDR_OFFSET | |
252 | ||
253 | /* The indices of the bytes in the packet trailer. */ | |
254 | #define TRLR_INDX_CSUM1 0 | |
255 | #define TRLR_INDX_CSUM2 1 | |
256 | #define TRLR_INDX_CSUM3 2 | |
257 | #define TRLR_LENGTH 3 | |
258 | ||
259 | /* How to compute the trailer bytes. */ | |
260 | #define TRLR_SET_CSUM1(cksum) (TRLR_OFFSET + (((cksum) >> 12) & 0x3f)) | |
261 | #define TRLR_SET_CSUM2(cksum) (TRLR_OFFSET + (((cksum) >> 6) & 0x3f)) | |
262 | #define TRLR_SET_CSUM3(cksum) (TRLR_OFFSET + (((cksum) ) & 0x3f)) | |
263 | ||
264 | /* Check that a trailer byte is reasonable. */ | |
265 | #define TRLR_CHECK(ch) (((ch) & TRLR_OFFSET) == TRLR_OFFSET) | |
266 | ||
267 | /* Get data from the trailer. This evaluates its argument multiple | |
268 | times. */ | |
269 | #define TRLR_GET_CKSUM(trlr) \ | |
270 | ((((trlr)[TRLR_INDX_CSUM1] & 0x3f) << 12) \ | |
271 | + (((trlr)[TRLR_INDX_CSUM2] & 0x3f) << 6) \ | |
272 | + ((trlr)[TRLR_INDX_CSUM3] & 0x3f)) | |
273 | ||
274 | /* The sequence number modulos. */ | |
275 | #define SEQ_MODULOS (64) | |
276 | ||
277 | /* PMON commands to load from the serial port or UDP socket. */ | |
278 | #define LOAD_CMD "load -b -s tty0\r" | |
279 | #define LOAD_CMD_UDP "load -b -s udp\r" | |
280 | ||
281 | /* The target vectors for the four different remote MIPS targets. | |
282 | These are initialized with code in _initialize_remote_mips instead | |
283 | of static initializers, to make it easier to extend the target_ops | |
284 | vector later. */ | |
bbd2783e | 285 | struct target_ops mips_ops, pmon_ops, ddb_ops, rockhopper_ops, lsi_ops; |
c906108c | 286 | |
c5aa993b JM |
287 | enum mips_monitor_type |
288 | { | |
289 | /* IDT/SIM monitor being used: */ | |
290 | MON_IDT, | |
291 | /* PMON monitor being used: */ | |
0df8b418 MS |
292 | MON_PMON, /* 3.0.83 [COGENT,EB,FP,NET] |
293 | Algorithmics Ltd. Nov 9 1995 17:19:50 */ | |
294 | MON_DDB, /* 2.7.473 [DDBVR4300,EL,FP,NET] | |
295 | Risq Modular Systems, | |
296 | Thu Jun 6 09:28:40 PDT 1996 */ | |
297 | MON_LSI, /* 4.3.12 [EB,FP], | |
298 | LSI LOGIC Corp. Tue Feb 25 13:22:14 1997 */ | |
bbd2783e | 299 | MON_ROCKHOPPER, |
0df8b418 | 300 | /* Last and unused value, for sizing vectors, etc. */ |
c5aa993b JM |
301 | MON_LAST |
302 | }; | |
c906108c SS |
303 | static enum mips_monitor_type mips_monitor = MON_LAST; |
304 | ||
305 | /* The monitor prompt text. If the user sets the PMON prompt | |
306 | to some new value, the GDB `set monitor-prompt' command must also | |
307 | be used to inform GDB about the expected prompt. Otherwise, GDB | |
308 | will not be able to connect to PMON in mips_initialize(). | |
309 | If the `set monitor-prompt' command is not used, the expected | |
310 | default prompt will be set according the target: | |
c5aa993b JM |
311 | target prompt |
312 | ----- ----- | |
313 | pmon PMON> | |
314 | ddb NEC010> | |
315 | lsi PMON> | |
316 | */ | |
c906108c SS |
317 | static char *mips_monitor_prompt; |
318 | ||
319 | /* Set to 1 if the target is open. */ | |
320 | static int mips_is_open; | |
321 | ||
0df8b418 | 322 | /* Currently active target description (if mips_is_open == 1). */ |
c906108c SS |
323 | static struct target_ops *current_ops; |
324 | ||
325 | /* Set to 1 while the connection is being initialized. */ | |
326 | static int mips_initializing; | |
327 | ||
328 | /* Set to 1 while the connection is being brought down. */ | |
329 | static int mips_exiting; | |
330 | ||
331 | /* The next sequence number to send. */ | |
332 | static unsigned int mips_send_seq; | |
333 | ||
334 | /* The next sequence number we expect to receive. */ | |
335 | static unsigned int mips_receive_seq; | |
336 | ||
337 | /* The time to wait before retransmitting a packet, in seconds. */ | |
338 | static int mips_retransmit_wait = 3; | |
339 | ||
340 | /* The number of times to try retransmitting a packet before giving up. */ | |
341 | static int mips_send_retries = 10; | |
342 | ||
343 | /* The number of garbage characters to accept when looking for an | |
344 | SYN for the next packet. */ | |
59d521c1 | 345 | static int mips_syn_garbage = 10; |
c906108c SS |
346 | |
347 | /* The time to wait for a packet, in seconds. */ | |
348 | static int mips_receive_wait = 5; | |
349 | ||
350 | /* Set if we have sent a packet to the board but have not yet received | |
351 | a reply. */ | |
352 | static int mips_need_reply = 0; | |
353 | ||
354 | /* Handle used to access serial I/O stream. */ | |
819cc324 | 355 | static struct serial *mips_desc; |
c906108c SS |
356 | |
357 | /* UDP handle used to download files to target. */ | |
819cc324 | 358 | static struct serial *udp_desc; |
c906108c SS |
359 | static int udp_in_use; |
360 | ||
361 | /* TFTP filename used to download files to DDB board, in the form | |
362 | host:filename. */ | |
363 | static char *tftp_name; /* host:filename */ | |
364 | static char *tftp_localname; /* filename portion of above */ | |
365 | static int tftp_in_use; | |
366 | static FILE *tftp_file; | |
367 | ||
368 | /* Counts the number of times the user tried to interrupt the target (usually | |
369 | via ^C. */ | |
370 | static int interrupt_count; | |
371 | ||
0df8b418 | 372 | /* If non-zero, means that the target is running. */ |
c906108c SS |
373 | static int mips_wait_flag = 0; |
374 | ||
0df8b418 | 375 | /* If non-zero, monitor supports breakpoint commands. */ |
d4f3574e | 376 | static int monitor_supports_breakpoints = 0; |
c906108c SS |
377 | |
378 | /* Data cache header. */ | |
379 | ||
0df8b418 | 380 | #if 0 /* not used (yet?) */ |
c906108c SS |
381 | static DCACHE *mips_dcache; |
382 | #endif | |
383 | ||
0df8b418 | 384 | /* Non-zero means that we've just hit a read or write watchpoint. */ |
c906108c SS |
385 | static int hit_watchpoint; |
386 | ||
387 | /* Table of breakpoints/watchpoints (used only on LSI PMON target). | |
388 | The table is indexed by a breakpoint number, which is an integer | |
0df8b418 MS |
389 | from 0 to 255 returned by the LSI PMON when a breakpoint is set. */ |
390 | ||
c906108c SS |
391 | #define MAX_LSI_BREAKPOINTS 256 |
392 | struct lsi_breakpoint_info | |
c5aa993b JM |
393 | { |
394 | enum break_type type; /* type of breakpoint */ | |
395 | CORE_ADDR addr; /* address of breakpoint */ | |
396 | int len; /* length of region being watched */ | |
397 | unsigned long value; /* value to watch */ | |
398 | } | |
399 | lsi_breakpoints[MAX_LSI_BREAKPOINTS]; | |
c906108c SS |
400 | |
401 | /* Error/warning codes returned by LSI PMON for breakpoint commands. | |
402 | Warning values may be ORed together; error values may not. */ | |
0df8b418 MS |
403 | #define W_WARN 0x100 /* This bit is set if the error code |
404 | is a warning */ | |
405 | #define W_MSK 0x101 /* warning: Range feature is supported | |
406 | via mask */ | |
407 | #define W_VAL 0x102 /* warning: Value check is not | |
408 | supported in hardware */ | |
409 | #define W_QAL 0x104 /* warning: Requested qualifiers are | |
410 | not supported in hardware */ | |
411 | ||
412 | #define E_ERR 0x200 /* This bit is set if the error code | |
413 | is an error */ | |
c5aa993b JM |
414 | #define E_BPT 0x200 /* error: No such breakpoint number */ |
415 | #define E_RGE 0x201 /* error: Range is not supported */ | |
0df8b418 MS |
416 | #define E_QAL 0x202 /* error: The requested qualifiers can |
417 | not be used */ | |
c5aa993b JM |
418 | #define E_OUT 0x203 /* error: Out of hardware resources */ |
419 | #define E_NON 0x204 /* error: Hardware breakpoint not supported */ | |
c906108c SS |
420 | |
421 | struct lsi_error | |
c5aa993b JM |
422 | { |
423 | int code; /* error code */ | |
424 | char *string; /* string associated with this code */ | |
425 | }; | |
c906108c SS |
426 | |
427 | struct lsi_error lsi_warning_table[] = | |
428 | { | |
c5aa993b JM |
429 | {W_MSK, "Range feature is supported via mask"}, |
430 | {W_VAL, "Value check is not supported in hardware"}, | |
431 | {W_QAL, "Requested qualifiers are not supported in hardware"}, | |
432 | {0, NULL} | |
c906108c SS |
433 | }; |
434 | ||
435 | struct lsi_error lsi_error_table[] = | |
c5aa993b JM |
436 | { |
437 | {E_BPT, "No such breakpoint number"}, | |
438 | {E_RGE, "Range is not supported"}, | |
439 | {E_QAL, "The requested qualifiers can not be used"}, | |
440 | {E_OUT, "Out of hardware resources"}, | |
441 | {E_NON, "Hardware breakpoint not supported"}, | |
442 | {0, NULL} | |
c906108c SS |
443 | }; |
444 | ||
445 | /* Set to 1 with the 'set monitor-warnings' command to enable printing | |
446 | of warnings returned by PMON when hardware breakpoints are used. */ | |
447 | static int monitor_warnings; | |
448 | ||
8eeafb51 KB |
449 | /* This is the ptid we use while we're connected to the remote. Its |
450 | value is arbitrary, as the remote-mips target doesn't have a notion of | |
451 | processes or threads, but we need something non-null to place in | |
452 | inferior_ptid. */ | |
453 | static ptid_t remote_mips_ptid; | |
c906108c | 454 | |
477c84a7 KB |
455 | /* Close any ports which might be open. Reset certain globals indicating |
456 | the state of those ports. */ | |
457 | ||
c906108c | 458 | static void |
fba45db2 | 459 | close_ports (void) |
c906108c SS |
460 | { |
461 | mips_is_open = 0; | |
2cd58942 | 462 | serial_close (mips_desc); |
c906108c SS |
463 | |
464 | if (udp_in_use) | |
465 | { | |
2cd58942 | 466 | serial_close (udp_desc); |
c906108c SS |
467 | udp_in_use = 0; |
468 | } | |
469 | tftp_in_use = 0; | |
470 | } | |
c5aa993b | 471 | |
c906108c SS |
472 | /* Handle low-level error that we can't recover from. Note that just |
473 | error()ing out from target_wait or some such low-level place will cause | |
474 | all hell to break loose--the rest of GDB will tend to get left in an | |
475 | inconsistent state. */ | |
476 | ||
c25c4a8b | 477 | static void ATTRIBUTE_NORETURN |
c5aa993b | 478 | mips_error (char *string,...) |
c906108c SS |
479 | { |
480 | va_list args; | |
13f78033 | 481 | char *fmt; |
c5aa993b | 482 | |
c906108c | 483 | target_terminal_ours (); |
0df8b418 | 484 | wrap_here (""); /* Force out any buffered output. */ |
c906108c | 485 | gdb_flush (gdb_stdout); |
c906108c SS |
486 | gdb_flush (gdb_stderr); |
487 | ||
488 | /* Clean up in such a way that mips_close won't try to talk to the | |
489 | board (it almost surely won't work since we weren't able to talk to | |
490 | it). */ | |
491 | close_ports (); | |
492 | ||
8eeafb51 KB |
493 | if (!ptid_equal (inferior_ptid, null_ptid)) |
494 | target_mourn_inferior (); | |
c906108c | 495 | |
13f78033 AB |
496 | fmt = concat (_("Ending remote MIPS debugging: "), |
497 | string, (char *) NULL); | |
498 | make_cleanup (xfree, fmt); | |
499 | ||
500 | va_start (args, string); | |
501 | throw_verror (TARGET_CLOSE_ERROR, fmt, args); | |
502 | va_end (args); | |
c906108c SS |
503 | } |
504 | ||
505 | /* putc_readable - print a character, displaying non-printable chars in | |
506 | ^x notation or in hex. */ | |
507 | ||
508 | static void | |
fba45db2 | 509 | fputc_readable (int ch, struct ui_file *file) |
c906108c SS |
510 | { |
511 | if (ch == '\n') | |
9846de1b | 512 | fputc_unfiltered ('\n', file); |
c906108c | 513 | else if (ch == '\r') |
9846de1b | 514 | fprintf_unfiltered (file, "\\r"); |
c5aa993b | 515 | else if (ch < 0x20) /* ASCII control character */ |
9846de1b | 516 | fprintf_unfiltered (file, "^%c", ch + '@'); |
c5aa993b | 517 | else if (ch >= 0x7f) /* non-ASCII characters (rubout or greater) */ |
9846de1b | 518 | fprintf_unfiltered (file, "[%02x]", ch & 0xff); |
c906108c | 519 | else |
9846de1b | 520 | fputc_unfiltered (ch, file); |
c906108c SS |
521 | } |
522 | ||
523 | ||
524 | /* puts_readable - print a string, displaying non-printable chars in | |
525 | ^x notation or in hex. */ | |
526 | ||
527 | static void | |
98691afe | 528 | fputs_readable (const char *string, struct ui_file *file) |
c906108c SS |
529 | { |
530 | int c; | |
531 | ||
532 | while ((c = *string++) != '\0') | |
9846de1b | 533 | fputc_readable (c, file); |
c906108c SS |
534 | } |
535 | ||
536 | ||
bbd2783e KB |
537 | /* Read P as a hex value. Return true if every character made sense, |
538 | storing the result in *RESULT. Leave *RESULT unchanged otherwise. */ | |
539 | ||
540 | static int | |
541 | read_hex_value (const char *p, ULONGEST *result) | |
542 | { | |
543 | ULONGEST retval; | |
544 | ||
545 | retval = 0; | |
546 | while (*p != 0) | |
547 | { | |
548 | retval <<= 4; | |
549 | if (*p >= '0' && *p <= '9') | |
550 | retval |= *p - '0'; | |
551 | else if (*p >= 'A' && *p <= 'F') | |
552 | retval |= *p - 'A' + 10; | |
553 | else if (*p >= 'a' && *p <= 'f') | |
554 | retval |= *p - 'a' + 10; | |
555 | else | |
556 | return 0; | |
557 | p++; | |
558 | } | |
559 | *result = retval; | |
560 | return 1; | |
561 | } | |
562 | ||
563 | ||
c906108c | 564 | /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if |
0df8b418 | 565 | timed out. TIMEOUT specifies timeout value in seconds. */ |
c906108c | 566 | |
a78f21af | 567 | static int |
98691afe | 568 | mips_expect_timeout (const char *string, int timeout) |
c906108c | 569 | { |
98691afe | 570 | const char *p = string; |
c906108c SS |
571 | |
572 | if (remote_debug) | |
573 | { | |
9846de1b JM |
574 | fprintf_unfiltered (gdb_stdlog, "Expected \""); |
575 | fputs_readable (string, gdb_stdlog); | |
576 | fprintf_unfiltered (gdb_stdlog, "\", got \""); | |
c906108c SS |
577 | } |
578 | ||
8edbea78 | 579 | immediate_quit++; |
522002f9 | 580 | QUIT; |
c906108c SS |
581 | while (1) |
582 | { | |
583 | int c; | |
584 | ||
2cd58942 | 585 | /* Must use serial_readchar() here cuz mips_readchar would get |
0df8b418 | 586 | confused if we were waiting for the mips_monitor_prompt... */ |
c906108c | 587 | |
2cd58942 | 588 | c = serial_readchar (mips_desc, timeout); |
c906108c SS |
589 | |
590 | if (c == SERIAL_TIMEOUT) | |
591 | { | |
592 | if (remote_debug) | |
9846de1b | 593 | fprintf_unfiltered (gdb_stdlog, "\": FAIL\n"); |
c906108c SS |
594 | return 0; |
595 | } | |
596 | ||
597 | if (remote_debug) | |
9846de1b | 598 | fputc_readable (c, gdb_stdlog); |
c906108c SS |
599 | |
600 | if (c == *p++) | |
c5aa993b | 601 | { |
c906108c SS |
602 | if (*p == '\0') |
603 | { | |
8edbea78 | 604 | immediate_quit--; |
c906108c | 605 | if (remote_debug) |
9846de1b | 606 | fprintf_unfiltered (gdb_stdlog, "\": OK\n"); |
c906108c SS |
607 | return 1; |
608 | } | |
609 | } | |
610 | else | |
611 | { | |
612 | p = string; | |
613 | if (c == *p) | |
614 | p++; | |
615 | } | |
616 | } | |
617 | } | |
618 | ||
619 | /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if | |
620 | timed out. The timeout value is hard-coded to 2 seconds. Use | |
0df8b418 | 621 | mips_expect_timeout if a different timeout value is needed. */ |
c906108c | 622 | |
a78f21af | 623 | static int |
98691afe | 624 | mips_expect (const char *string) |
c906108c | 625 | { |
688991e6 | 626 | return mips_expect_timeout (string, remote_timeout); |
c906108c SS |
627 | } |
628 | ||
c906108c | 629 | /* Read a character from the remote, aborting on error. Returns |
2cd58942 AC |
630 | SERIAL_TIMEOUT on timeout (since that's what serial_readchar() |
631 | returns). FIXME: If we see the string mips_monitor_prompt from the | |
632 | board, then we are debugging on the main console port, and we have | |
633 | somehow dropped out of remote debugging mode. In this case, we | |
634 | automatically go back in to remote debugging mode. This is a hack, | |
635 | put in because I can't find any way for a program running on the | |
636 | remote board to terminate without also ending remote debugging | |
c906108c SS |
637 | mode. I assume users won't have any trouble with this; for one |
638 | thing, the IDT documentation generally assumes that the remote | |
639 | debugging port is not the console port. This is, however, very | |
640 | convenient for DejaGnu when you only have one connected serial | |
641 | port. */ | |
642 | ||
643 | static int | |
fba45db2 | 644 | mips_readchar (int timeout) |
c906108c SS |
645 | { |
646 | int ch; | |
647 | static int state = 0; | |
648 | int mips_monitor_prompt_len = strlen (mips_monitor_prompt); | |
649 | ||
0df8b418 | 650 | { /* FIXME this whole block is dead code! */ |
c906108c SS |
651 | int i; |
652 | ||
653 | i = timeout; | |
654 | if (i == -1 && watchdog > 0) | |
c5aa993b | 655 | i = watchdog; |
c906108c | 656 | } |
c906108c SS |
657 | |
658 | if (state == mips_monitor_prompt_len) | |
659 | timeout = 1; | |
2cd58942 | 660 | ch = serial_readchar (mips_desc, timeout); |
7a292a7a | 661 | |
0df8b418 | 662 | if (ch == SERIAL_TIMEOUT && timeout == -1) /* Watchdog went off. */ |
c906108c SS |
663 | { |
664 | target_mourn_inferior (); | |
b37520b6 | 665 | error (_("Watchdog has expired. Target detached.")); |
c906108c | 666 | } |
7a292a7a | 667 | |
c906108c | 668 | if (ch == SERIAL_EOF) |
cdefc55d | 669 | mips_error (_("End of file from remote")); |
c906108c | 670 | if (ch == SERIAL_ERROR) |
cdefc55d | 671 | mips_error (_("Error reading from remote: %s"), safe_strerror (errno)); |
c906108c SS |
672 | if (remote_debug > 1) |
673 | { | |
674 | /* Don't use _filtered; we can't deal with a QUIT out of | |
c5aa993b | 675 | target_wait, and I think this might be called from there. */ |
c906108c | 676 | if (ch != SERIAL_TIMEOUT) |
9846de1b | 677 | fprintf_unfiltered (gdb_stdlog, "Read '%c' %d 0x%x\n", ch, ch, ch); |
c906108c | 678 | else |
9846de1b | 679 | fprintf_unfiltered (gdb_stdlog, "Timed out in read\n"); |
c906108c SS |
680 | } |
681 | ||
682 | /* If we have seen mips_monitor_prompt and we either time out, or | |
683 | we see a @ (which was echoed from a packet we sent), reset the | |
684 | board as described above. The first character in a packet after | |
685 | the SYN (which is not echoed) is always an @ unless the packet is | |
686 | more than 64 characters long, which ours never are. */ | |
687 | if ((ch == SERIAL_TIMEOUT || ch == '@') | |
688 | && state == mips_monitor_prompt_len | |
c5aa993b JM |
689 | && !mips_initializing |
690 | && !mips_exiting) | |
c906108c SS |
691 | { |
692 | if (remote_debug > 0) | |
693 | /* Don't use _filtered; we can't deal with a QUIT out of | |
694 | target_wait, and I think this might be called from there. */ | |
0df8b418 MS |
695 | fprintf_unfiltered (gdb_stdlog, |
696 | "Reinitializing MIPS debugging mode\n"); | |
c906108c SS |
697 | |
698 | mips_need_reply = 0; | |
699 | mips_initialize (); | |
700 | ||
701 | state = 0; | |
702 | ||
703 | /* At this point, about the only thing we can do is abort the command | |
0df8b418 | 704 | in progress and get back to command level as quickly as possible. */ |
c906108c | 705 | |
9b20d036 | 706 | error (_("Remote board reset, debug protocol re-initialized.")); |
c906108c SS |
707 | } |
708 | ||
709 | if (ch == mips_monitor_prompt[state]) | |
710 | ++state; | |
711 | else | |
712 | state = 0; | |
713 | ||
714 | return ch; | |
715 | } | |
716 | ||
717 | /* Get a packet header, putting the data in the supplied buffer. | |
718 | PGARBAGE is a pointer to the number of garbage characters received | |
719 | so far. CH is the last character received. Returns 0 for success, | |
720 | or -1 for timeout. */ | |
721 | ||
722 | static int | |
fba45db2 | 723 | mips_receive_header (unsigned char *hdr, int *pgarbage, int ch, int timeout) |
c906108c SS |
724 | { |
725 | int i; | |
726 | ||
727 | while (1) | |
728 | { | |
729 | /* Wait for a SYN. mips_syn_garbage is intended to prevent | |
c5aa993b JM |
730 | sitting here indefinitely if the board sends us one garbage |
731 | character per second. ch may already have a value from the | |
732 | last time through the loop. */ | |
c906108c SS |
733 | while (ch != SYN) |
734 | { | |
735 | ch = mips_readchar (timeout); | |
736 | if (ch == SERIAL_TIMEOUT) | |
c5aa993b | 737 | return -1; |
c906108c SS |
738 | if (ch != SYN) |
739 | { | |
740 | /* Printing the character here lets the user of gdb see | |
c5aa993b | 741 | what the program is outputting, if the debugging is |
59d521c1 AC |
742 | being done on the console port. Don't use _filtered: |
743 | we can't deal with a QUIT out of target_wait and | |
0df8b418 | 744 | buffered target output confuses the user. */ |
59d521c1 AC |
745 | if (!mips_initializing || remote_debug > 0) |
746 | { | |
747 | if (isprint (ch) || isspace (ch)) | |
748 | { | |
749 | fputc_unfiltered (ch, gdb_stdtarg); | |
750 | } | |
751 | else | |
752 | { | |
753 | fputc_readable (ch, gdb_stdtarg); | |
754 | } | |
755 | gdb_flush (gdb_stdtarg); | |
756 | } | |
757 | ||
0df8b418 | 758 | /* Only count unprintable characters. */ |
59d521c1 AC |
759 | if (! (isprint (ch) || isspace (ch))) |
760 | (*pgarbage) += 1; | |
761 | ||
c906108c SS |
762 | if (mips_syn_garbage > 0 |
763 | && *pgarbage > mips_syn_garbage) | |
cdefc55d KB |
764 | mips_error (_("Debug protocol failure: more " |
765 | "than %d characters before a sync."), | |
c906108c SS |
766 | mips_syn_garbage); |
767 | } | |
768 | } | |
769 | ||
770 | /* Get the packet header following the SYN. */ | |
771 | for (i = 1; i < HDR_LENGTH; i++) | |
772 | { | |
773 | ch = mips_readchar (timeout); | |
774 | if (ch == SERIAL_TIMEOUT) | |
c5aa993b | 775 | return -1; |
c906108c | 776 | /* Make sure this is a header byte. */ |
c5aa993b | 777 | if (ch == SYN || !HDR_CHECK (ch)) |
c906108c SS |
778 | break; |
779 | ||
780 | hdr[i] = ch; | |
781 | } | |
782 | ||
783 | /* If we got the complete header, we can return. Otherwise we | |
c5aa993b | 784 | loop around and keep looking for SYN. */ |
c906108c | 785 | if (i >= HDR_LENGTH) |
c5aa993b | 786 | return 0; |
c906108c SS |
787 | } |
788 | } | |
789 | ||
790 | /* Get a packet header, putting the data in the supplied buffer. | |
791 | PGARBAGE is a pointer to the number of garbage characters received | |
792 | so far. The last character read is returned in *PCH. Returns 0 | |
793 | for success, -1 for timeout, -2 for error. */ | |
794 | ||
795 | static int | |
0df8b418 MS |
796 | mips_receive_trailer (unsigned char *trlr, int *pgarbage, |
797 | int *pch, int timeout) | |
c906108c SS |
798 | { |
799 | int i; | |
800 | int ch; | |
801 | ||
802 | for (i = 0; i < TRLR_LENGTH; i++) | |
803 | { | |
804 | ch = mips_readchar (timeout); | |
805 | *pch = ch; | |
806 | if (ch == SERIAL_TIMEOUT) | |
807 | return -1; | |
c5aa993b | 808 | if (!TRLR_CHECK (ch)) |
c906108c SS |
809 | return -2; |
810 | trlr[i] = ch; | |
811 | } | |
812 | return 0; | |
813 | } | |
814 | ||
815 | /* Get the checksum of a packet. HDR points to the packet header. | |
ce6ec7d8 | 816 | DATASTR points to the packet data. LEN is the length of DATASTR. */ |
c906108c SS |
817 | |
818 | static int | |
ce6ec7d8 | 819 | mips_cksum (const unsigned char *hdr, const char *datastr, int len) |
c906108c | 820 | { |
52f0bd74 | 821 | const unsigned char *p; |
ce6ec7d8 | 822 | const unsigned char *data = (const unsigned char *) datastr; |
52f0bd74 AC |
823 | int c; |
824 | int cksum; | |
c906108c SS |
825 | |
826 | cksum = 0; | |
827 | ||
828 | /* The initial SYN is not included in the checksum. */ | |
829 | c = HDR_LENGTH - 1; | |
830 | p = hdr + 1; | |
831 | while (c-- != 0) | |
832 | cksum += *p++; | |
c5aa993b | 833 | |
c906108c SS |
834 | c = len; |
835 | p = data; | |
836 | while (c-- != 0) | |
837 | cksum += *p++; | |
838 | ||
839 | return cksum; | |
840 | } | |
841 | ||
842 | /* Send a packet containing the given ASCII string. */ | |
843 | ||
844 | static void | |
fba45db2 | 845 | mips_send_packet (const char *s, int get_ack) |
c906108c SS |
846 | { |
847 | /* unsigned */ int len; | |
848 | unsigned char *packet; | |
52f0bd74 | 849 | int cksum; |
c906108c SS |
850 | int try; |
851 | ||
852 | len = strlen (s); | |
853 | if (len > DATA_MAXLEN) | |
cdefc55d | 854 | mips_error (_("MIPS protocol data packet too long: %s"), s); |
c906108c SS |
855 | |
856 | packet = (unsigned char *) alloca (HDR_LENGTH + len + TRLR_LENGTH + 1); | |
857 | ||
858 | packet[HDR_INDX_SYN] = HDR_SET_SYN (1, len, mips_send_seq); | |
859 | packet[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (1, len, mips_send_seq); | |
860 | packet[HDR_INDX_LEN1] = HDR_SET_LEN1 (1, len, mips_send_seq); | |
861 | packet[HDR_INDX_SEQ] = HDR_SET_SEQ (1, len, mips_send_seq); | |
862 | ||
863 | memcpy (packet + HDR_LENGTH, s, len); | |
864 | ||
ce6ec7d8 | 865 | cksum = mips_cksum (packet, (char *) packet + HDR_LENGTH, len); |
c906108c SS |
866 | packet[HDR_LENGTH + len + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum); |
867 | packet[HDR_LENGTH + len + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum); | |
868 | packet[HDR_LENGTH + len + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum); | |
869 | ||
870 | /* Increment the sequence number. This will set mips_send_seq to | |
871 | the sequence number we expect in the acknowledgement. */ | |
872 | mips_send_seq = (mips_send_seq + 1) % SEQ_MODULOS; | |
873 | ||
874 | /* We can only have one outstanding data packet, so we just wait for | |
875 | the acknowledgement here. Keep retransmitting the packet until | |
876 | we get one, or until we've tried too many times. */ | |
877 | for (try = 0; try < mips_send_retries; try++) | |
878 | { | |
879 | int garbage; | |
880 | int ch; | |
881 | ||
882 | if (remote_debug > 0) | |
883 | { | |
884 | /* Don't use _filtered; we can't deal with a QUIT out of | |
885 | target_wait, and I think this might be called from there. */ | |
886 | packet[HDR_LENGTH + len + TRLR_LENGTH] = '\0'; | |
9846de1b | 887 | fprintf_unfiltered (gdb_stdlog, "Writing \"%s\"\n", packet + 1); |
c906108c SS |
888 | } |
889 | ||
2cd58942 | 890 | if (serial_write (mips_desc, packet, |
c906108c | 891 | HDR_LENGTH + len + TRLR_LENGTH) != 0) |
cdefc55d | 892 | mips_error (_("write to target failed: %s"), safe_strerror (errno)); |
c906108c | 893 | |
c5aa993b | 894 | if (!get_ack) |
c906108c SS |
895 | return; |
896 | ||
897 | garbage = 0; | |
898 | ch = 0; | |
899 | while (1) | |
900 | { | |
901 | unsigned char hdr[HDR_LENGTH + 1]; | |
902 | unsigned char trlr[TRLR_LENGTH + 1]; | |
903 | int err; | |
904 | unsigned int seq; | |
905 | ||
906 | /* Get the packet header. If we time out, resend the data | |
907 | packet. */ | |
908 | err = mips_receive_header (hdr, &garbage, ch, mips_retransmit_wait); | |
909 | if (err != 0) | |
910 | break; | |
911 | ||
912 | ch = 0; | |
913 | ||
914 | /* If we get a data packet, assume it is a duplicate and | |
915 | ignore it. FIXME: If the acknowledgement is lost, this | |
916 | data packet may be the packet the remote sends after the | |
917 | acknowledgement. */ | |
c5aa993b JM |
918 | if (HDR_IS_DATA (hdr)) |
919 | { | |
920 | int i; | |
921 | ||
922 | /* Ignore any errors raised whilst attempting to ignore | |
0df8b418 | 923 | packet. */ |
c5aa993b JM |
924 | |
925 | len = HDR_GET_LEN (hdr); | |
926 | ||
927 | for (i = 0; i < len; i++) | |
928 | { | |
929 | int rch; | |
930 | ||
688991e6 | 931 | rch = mips_readchar (remote_timeout); |
c5aa993b JM |
932 | if (rch == SYN) |
933 | { | |
934 | ch = SYN; | |
935 | break; | |
936 | } | |
937 | if (rch == SERIAL_TIMEOUT) | |
938 | break; | |
0df8b418 | 939 | /* Ignore the character. */ |
c5aa993b JM |
940 | } |
941 | ||
942 | if (i == len) | |
688991e6 AC |
943 | (void) mips_receive_trailer (trlr, &garbage, &ch, |
944 | remote_timeout); | |
c5aa993b JM |
945 | |
946 | /* We don't bother checking the checksum, or providing an | |
0df8b418 | 947 | ACK to the packet. */ |
c5aa993b JM |
948 | continue; |
949 | } | |
c906108c SS |
950 | |
951 | /* If the length is not 0, this is a garbled packet. */ | |
952 | if (HDR_GET_LEN (hdr) != 0) | |
953 | continue; | |
954 | ||
955 | /* Get the packet trailer. */ | |
956 | err = mips_receive_trailer (trlr, &garbage, &ch, | |
957 | mips_retransmit_wait); | |
958 | ||
959 | /* If we timed out, resend the data packet. */ | |
960 | if (err == -1) | |
961 | break; | |
962 | ||
963 | /* If we got a bad character, reread the header. */ | |
964 | if (err != 0) | |
965 | continue; | |
966 | ||
967 | /* If the checksum does not match the trailer checksum, this | |
968 | is a bad packet; ignore it. */ | |
ce6ec7d8 | 969 | if (mips_cksum (hdr, NULL, 0) != TRLR_GET_CKSUM (trlr)) |
c906108c SS |
970 | continue; |
971 | ||
972 | if (remote_debug > 0) | |
973 | { | |
974 | hdr[HDR_LENGTH] = '\0'; | |
975 | trlr[TRLR_LENGTH] = '\0'; | |
976 | /* Don't use _filtered; we can't deal with a QUIT out of | |
c5aa993b | 977 | target_wait, and I think this might be called from there. */ |
9846de1b JM |
978 | fprintf_unfiltered (gdb_stdlog, "Got ack %d \"%s%s\"\n", |
979 | HDR_GET_SEQ (hdr), hdr + 1, trlr); | |
c906108c SS |
980 | } |
981 | ||
982 | /* If this ack is for the current packet, we're done. */ | |
983 | seq = HDR_GET_SEQ (hdr); | |
984 | if (seq == mips_send_seq) | |
985 | return; | |
986 | ||
987 | /* If this ack is for the last packet, resend the current | |
988 | packet. */ | |
989 | if ((seq + 1) % SEQ_MODULOS == mips_send_seq) | |
990 | break; | |
991 | ||
992 | /* Otherwise this is a bad ack; ignore it. Increment the | |
993 | garbage count to ensure that we do not stay in this loop | |
994 | forever. */ | |
995 | ++garbage; | |
996 | } | |
997 | } | |
998 | ||
cdefc55d | 999 | mips_error (_("Remote did not acknowledge packet")); |
c906108c SS |
1000 | } |
1001 | ||
1002 | /* Receive and acknowledge a packet, returning the data in BUFF (which | |
1003 | should be DATA_MAXLEN + 1 bytes). The protocol documentation | |
1004 | implies that only the sender retransmits packets, so this code just | |
1005 | waits silently for a packet. It returns the length of the received | |
1006 | packet. If THROW_ERROR is nonzero, call error() on errors. If not, | |
1007 | don't print an error message and return -1. */ | |
1008 | ||
1009 | static int | |
fba45db2 | 1010 | mips_receive_packet (char *buff, int throw_error, int timeout) |
c906108c SS |
1011 | { |
1012 | int ch; | |
1013 | int garbage; | |
1014 | int len; | |
1015 | unsigned char ack[HDR_LENGTH + TRLR_LENGTH + 1]; | |
1016 | int cksum; | |
1017 | ||
1018 | ch = 0; | |
1019 | garbage = 0; | |
1020 | while (1) | |
1021 | { | |
1022 | unsigned char hdr[HDR_LENGTH]; | |
1023 | unsigned char trlr[TRLR_LENGTH]; | |
1024 | int i; | |
1025 | int err; | |
1026 | ||
1027 | if (mips_receive_header (hdr, &garbage, ch, timeout) != 0) | |
1028 | { | |
1029 | if (throw_error) | |
cdefc55d | 1030 | mips_error (_("Timed out waiting for remote packet")); |
c906108c SS |
1031 | else |
1032 | return -1; | |
1033 | } | |
1034 | ||
1035 | ch = 0; | |
1036 | ||
1037 | /* An acknowledgement is probably a duplicate; ignore it. */ | |
c5aa993b | 1038 | if (!HDR_IS_DATA (hdr)) |
c906108c | 1039 | { |
c5aa993b JM |
1040 | len = HDR_GET_LEN (hdr); |
1041 | /* Check if the length is valid for an ACK, we may aswell | |
1042 | try and read the remainder of the packet: */ | |
1043 | if (len == 0) | |
1044 | { | |
1045 | /* Ignore the error condition, since we are going to | |
0df8b418 | 1046 | ignore the packet anyway. */ |
c5aa993b JM |
1047 | (void) mips_receive_trailer (trlr, &garbage, &ch, timeout); |
1048 | } | |
c906108c SS |
1049 | /* Don't use _filtered; we can't deal with a QUIT out of |
1050 | target_wait, and I think this might be called from there. */ | |
1051 | if (remote_debug > 0) | |
9846de1b | 1052 | fprintf_unfiltered (gdb_stdlog, "Ignoring unexpected ACK\n"); |
c906108c SS |
1053 | continue; |
1054 | } | |
1055 | ||
1056 | len = HDR_GET_LEN (hdr); | |
1057 | for (i = 0; i < len; i++) | |
1058 | { | |
1059 | int rch; | |
1060 | ||
1061 | rch = mips_readchar (timeout); | |
1062 | if (rch == SYN) | |
1063 | { | |
1064 | ch = SYN; | |
1065 | break; | |
1066 | } | |
1067 | if (rch == SERIAL_TIMEOUT) | |
1068 | { | |
1069 | if (throw_error) | |
cdefc55d | 1070 | mips_error (_("Timed out waiting for remote packet")); |
c906108c SS |
1071 | else |
1072 | return -1; | |
1073 | } | |
1074 | buff[i] = rch; | |
1075 | } | |
1076 | ||
1077 | if (i < len) | |
1078 | { | |
1079 | /* Don't use _filtered; we can't deal with a QUIT out of | |
1080 | target_wait, and I think this might be called from there. */ | |
1081 | if (remote_debug > 0) | |
9846de1b JM |
1082 | fprintf_unfiltered (gdb_stdlog, |
1083 | "Got new SYN after %d chars (wanted %d)\n", | |
1084 | i, len); | |
c906108c SS |
1085 | continue; |
1086 | } | |
1087 | ||
1088 | err = mips_receive_trailer (trlr, &garbage, &ch, timeout); | |
1089 | if (err == -1) | |
1090 | { | |
1091 | if (throw_error) | |
cdefc55d | 1092 | mips_error (_("Timed out waiting for packet")); |
c906108c SS |
1093 | else |
1094 | return -1; | |
1095 | } | |
1096 | if (err == -2) | |
1097 | { | |
1098 | /* Don't use _filtered; we can't deal with a QUIT out of | |
1099 | target_wait, and I think this might be called from there. */ | |
1100 | if (remote_debug > 0) | |
9846de1b | 1101 | fprintf_unfiltered (gdb_stdlog, "Got SYN when wanted trailer\n"); |
c906108c SS |
1102 | continue; |
1103 | } | |
1104 | ||
1105 | /* If this is the wrong sequence number, ignore it. */ | |
1106 | if (HDR_GET_SEQ (hdr) != mips_receive_seq) | |
1107 | { | |
1108 | /* Don't use _filtered; we can't deal with a QUIT out of | |
1109 | target_wait, and I think this might be called from there. */ | |
1110 | if (remote_debug > 0) | |
9846de1b | 1111 | fprintf_unfiltered (gdb_stdlog, |
c5aa993b JM |
1112 | "Ignoring sequence number %d (want %d)\n", |
1113 | HDR_GET_SEQ (hdr), mips_receive_seq); | |
c906108c SS |
1114 | continue; |
1115 | } | |
1116 | ||
1117 | if (mips_cksum (hdr, buff, len) == TRLR_GET_CKSUM (trlr)) | |
c5aa993b | 1118 | break; |
c906108c SS |
1119 | |
1120 | if (remote_debug > 0) | |
1121 | /* Don't use _filtered; we can't deal with a QUIT out of | |
1122 | target_wait, and I think this might be called from there. */ | |
1123 | printf_unfiltered ("Bad checksum; data %d, trailer %d\n", | |
c5aa993b JM |
1124 | mips_cksum (hdr, buff, len), |
1125 | TRLR_GET_CKSUM (trlr)); | |
c906108c SS |
1126 | |
1127 | /* The checksum failed. Send an acknowledgement for the | |
c5aa993b | 1128 | previous packet to tell the remote to resend the packet. */ |
c906108c SS |
1129 | ack[HDR_INDX_SYN] = HDR_SET_SYN (0, 0, mips_receive_seq); |
1130 | ack[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq); | |
1131 | ack[HDR_INDX_LEN1] = HDR_SET_LEN1 (0, 0, mips_receive_seq); | |
1132 | ack[HDR_INDX_SEQ] = HDR_SET_SEQ (0, 0, mips_receive_seq); | |
1133 | ||
ce6ec7d8 | 1134 | cksum = mips_cksum (ack, NULL, 0); |
c906108c SS |
1135 | |
1136 | ack[HDR_LENGTH + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum); | |
1137 | ack[HDR_LENGTH + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum); | |
1138 | ack[HDR_LENGTH + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum); | |
1139 | ||
1140 | if (remote_debug > 0) | |
1141 | { | |
1142 | ack[HDR_LENGTH + TRLR_LENGTH] = '\0'; | |
1143 | /* Don't use _filtered; we can't deal with a QUIT out of | |
1144 | target_wait, and I think this might be called from there. */ | |
1145 | printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq, | |
c5aa993b | 1146 | ack + 1); |
c906108c SS |
1147 | } |
1148 | ||
2cd58942 | 1149 | if (serial_write (mips_desc, ack, HDR_LENGTH + TRLR_LENGTH) != 0) |
c906108c SS |
1150 | { |
1151 | if (throw_error) | |
cdefc55d KB |
1152 | mips_error (_("write to target failed: %s"), |
1153 | safe_strerror (errno)); | |
c906108c SS |
1154 | else |
1155 | return -1; | |
1156 | } | |
1157 | } | |
1158 | ||
1159 | if (remote_debug > 0) | |
1160 | { | |
1161 | buff[len] = '\0'; | |
1162 | /* Don't use _filtered; we can't deal with a QUIT out of | |
c5aa993b | 1163 | target_wait, and I think this might be called from there. */ |
c906108c SS |
1164 | printf_unfiltered ("Got packet \"%s\"\n", buff); |
1165 | } | |
1166 | ||
1167 | /* We got the packet. Send an acknowledgement. */ | |
1168 | mips_receive_seq = (mips_receive_seq + 1) % SEQ_MODULOS; | |
1169 | ||
1170 | ack[HDR_INDX_SYN] = HDR_SET_SYN (0, 0, mips_receive_seq); | |
1171 | ack[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq); | |
1172 | ack[HDR_INDX_LEN1] = HDR_SET_LEN1 (0, 0, mips_receive_seq); | |
1173 | ack[HDR_INDX_SEQ] = HDR_SET_SEQ (0, 0, mips_receive_seq); | |
1174 | ||
ce6ec7d8 | 1175 | cksum = mips_cksum (ack, NULL, 0); |
c906108c SS |
1176 | |
1177 | ack[HDR_LENGTH + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum); | |
1178 | ack[HDR_LENGTH + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum); | |
1179 | ack[HDR_LENGTH + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum); | |
1180 | ||
1181 | if (remote_debug > 0) | |
1182 | { | |
1183 | ack[HDR_LENGTH + TRLR_LENGTH] = '\0'; | |
1184 | /* Don't use _filtered; we can't deal with a QUIT out of | |
c5aa993b | 1185 | target_wait, and I think this might be called from there. */ |
c906108c | 1186 | printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq, |
c5aa993b | 1187 | ack + 1); |
c906108c SS |
1188 | } |
1189 | ||
2cd58942 | 1190 | if (serial_write (mips_desc, ack, HDR_LENGTH + TRLR_LENGTH) != 0) |
c906108c SS |
1191 | { |
1192 | if (throw_error) | |
cdefc55d | 1193 | mips_error (_("write to target failed: %s"), safe_strerror (errno)); |
c906108c SS |
1194 | else |
1195 | return -1; | |
1196 | } | |
1197 | ||
1198 | return len; | |
1199 | } | |
1200 | \f | |
1201 | /* Optionally send a request to the remote system and optionally wait | |
1202 | for the reply. This implements the remote debugging protocol, | |
1203 | which is built on top of the packet protocol defined above. Each | |
1204 | request has an ADDR argument and a DATA argument. The following | |
1205 | requests are defined: | |
1206 | ||
c5aa993b JM |
1207 | \0 don't send a request; just wait for a reply |
1208 | i read word from instruction space at ADDR | |
1209 | d read word from data space at ADDR | |
1210 | I write DATA to instruction space at ADDR | |
1211 | D write DATA to data space at ADDR | |
1212 | r read register number ADDR | |
1213 | R set register number ADDR to value DATA | |
1214 | c continue execution (if ADDR != 1, set pc to ADDR) | |
1215 | s single step (if ADDR != 1, set pc to ADDR) | |
c906108c SS |
1216 | |
1217 | The read requests return the value requested. The write requests | |
1218 | return the previous value in the changed location. The execution | |
1219 | requests return a UNIX wait value (the approximate signal which | |
1220 | caused execution to stop is in the upper eight bits). | |
1221 | ||
1222 | If PERR is not NULL, this function waits for a reply. If an error | |
1223 | occurs, it sets *PERR to 1 and sets errno according to what the | |
1224 | target board reports. */ | |
1225 | ||
4014092b AC |
1226 | static ULONGEST |
1227 | mips_request (int cmd, | |
1228 | ULONGEST addr, | |
1229 | ULONGEST data, | |
1230 | int *perr, | |
1231 | int timeout, | |
1232 | char *buff) | |
c906108c | 1233 | { |
f5656ead | 1234 | int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8; |
c906108c | 1235 | char myBuff[DATA_MAXLEN + 1]; |
bbd2783e | 1236 | char response_string[17]; |
c906108c SS |
1237 | int len; |
1238 | int rpid; | |
1239 | char rcmd; | |
1240 | int rerrflg; | |
bbd2783e | 1241 | ULONGEST rresponse; |
c906108c SS |
1242 | |
1243 | if (buff == (char *) NULL) | |
1244 | buff = myBuff; | |
1245 | ||
1246 | if (cmd != '\0') | |
1247 | { | |
1248 | if (mips_need_reply) | |
8e65ff28 | 1249 | internal_error (__FILE__, __LINE__, |
0df8b418 MS |
1250 | _("mips_request: Trying to send " |
1251 | "command before reply")); | |
bbd2783e KB |
1252 | /* 'T' sets a register to a 64-bit value, so make sure we use |
1253 | the right conversion function. */ | |
1254 | if (cmd == 'T') | |
1255 | sprintf (buff, "0x0 %c 0x%s 0x%s", cmd, | |
1256 | phex_nz (addr, addr_size), phex_nz (data, 8)); | |
1257 | else | |
1258 | sprintf (buff, "0x0 %c 0x%s 0x%s", cmd, | |
1259 | phex_nz (addr, addr_size), phex_nz (data, addr_size)); | |
1260 | ||
c906108c SS |
1261 | mips_send_packet (buff, 1); |
1262 | mips_need_reply = 1; | |
1263 | } | |
1264 | ||
1265 | if (perr == (int *) NULL) | |
1266 | return 0; | |
1267 | ||
c5aa993b | 1268 | if (!mips_need_reply) |
8e65ff28 | 1269 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 1270 | _("mips_request: Trying to get reply before command")); |
c906108c SS |
1271 | |
1272 | mips_need_reply = 0; | |
1273 | ||
1274 | len = mips_receive_packet (buff, 1, timeout); | |
1275 | buff[len] = '\0'; | |
1276 | ||
bbd2783e KB |
1277 | if (sscanf (buff, "0x%x %c 0x%x 0x%16s", |
1278 | &rpid, &rcmd, &rerrflg, response_string) != 4 | |
1279 | || !read_hex_value (response_string, &rresponse) | |
c906108c | 1280 | || (cmd != '\0' && rcmd != cmd)) |
cdefc55d | 1281 | mips_error (_("Bad response from remote board")); |
c906108c SS |
1282 | |
1283 | if (rerrflg != 0) | |
1284 | { | |
1285 | *perr = 1; | |
1286 | ||
1287 | /* FIXME: This will returns MIPS errno numbers, which may or may | |
c5aa993b JM |
1288 | not be the same as errno values used on other systems. If |
1289 | they stick to common errno values, they will be the same, but | |
1290 | if they don't, they must be translated. */ | |
c906108c SS |
1291 | errno = rresponse; |
1292 | ||
1293 | return 0; | |
1294 | } | |
1295 | ||
1296 | *perr = 0; | |
1297 | return rresponse; | |
1298 | } | |
1299 | ||
477c84a7 KB |
1300 | /* Cleanup associated with mips_initialize(). */ |
1301 | ||
c906108c | 1302 | static void |
4efb68b1 | 1303 | mips_initialize_cleanups (void *arg) |
c906108c SS |
1304 | { |
1305 | mips_initializing = 0; | |
1306 | } | |
1307 | ||
477c84a7 KB |
1308 | /* Cleanup associated with mips_exit_debug(). */ |
1309 | ||
c906108c | 1310 | static void |
4efb68b1 | 1311 | mips_exit_cleanups (void *arg) |
c906108c SS |
1312 | { |
1313 | mips_exiting = 0; | |
1314 | } | |
1315 | ||
477c84a7 KB |
1316 | /* Send a command and wait for that command to be echoed back. Wait, |
1317 | too, for the following prompt. */ | |
1318 | ||
c906108c | 1319 | static void |
fba45db2 | 1320 | mips_send_command (const char *cmd, int prompt) |
c906108c | 1321 | { |
2cd58942 | 1322 | serial_write (mips_desc, cmd, strlen (cmd)); |
c906108c SS |
1323 | mips_expect (cmd); |
1324 | mips_expect ("\n"); | |
1325 | if (prompt) | |
1326 | mips_expect (mips_monitor_prompt); | |
1327 | } | |
1328 | ||
1329 | /* Enter remote (dbx) debug mode: */ | |
477c84a7 | 1330 | |
c906108c | 1331 | static void |
fba45db2 | 1332 | mips_enter_debug (void) |
c906108c SS |
1333 | { |
1334 | /* Reset the sequence numbers, ready for the new debug sequence: */ | |
1335 | mips_send_seq = 0; | |
1336 | mips_receive_seq = 0; | |
1337 | ||
1338 | if (mips_monitor != MON_IDT) | |
1339 | mips_send_command ("debug\r", 0); | |
0df8b418 | 1340 | else /* Assume IDT monitor by default. */ |
c906108c SS |
1341 | mips_send_command ("db tty0\r", 0); |
1342 | ||
6023c606 | 1343 | gdb_usleep (1000000); |
2cd58942 | 1344 | serial_write (mips_desc, "\r", sizeof "\r" - 1); |
c906108c SS |
1345 | |
1346 | /* We don't need to absorb any spurious characters here, since the | |
1347 | mips_receive_header will eat up a reasonable number of characters | |
1348 | whilst looking for the SYN, however this avoids the "garbage" | |
0df8b418 | 1349 | being displayed to the user. */ |
c906108c SS |
1350 | if (mips_monitor != MON_IDT) |
1351 | mips_expect ("\r"); | |
c5aa993b | 1352 | |
c906108c SS |
1353 | { |
1354 | char buff[DATA_MAXLEN + 1]; | |
123f5f96 | 1355 | |
c906108c | 1356 | if (mips_receive_packet (buff, 1, 3) < 0) |
cdefc55d | 1357 | mips_error (_("Failed to initialize (didn't receive packet).")); |
c906108c SS |
1358 | } |
1359 | } | |
1360 | ||
1361 | /* Exit remote (dbx) debug mode, returning to the monitor prompt: */ | |
477c84a7 | 1362 | |
c906108c | 1363 | static int |
fba45db2 | 1364 | mips_exit_debug (void) |
c906108c SS |
1365 | { |
1366 | int err; | |
1367 | struct cleanup *old_cleanups = make_cleanup (mips_exit_cleanups, NULL); | |
1368 | ||
1369 | mips_exiting = 1; | |
1370 | ||
bbd2783e | 1371 | if (mips_monitor != MON_IDT && mips_monitor != MON_ROCKHOPPER) |
c906108c SS |
1372 | { |
1373 | /* The DDB (NEC) and MiniRISC (LSI) versions of PMON exit immediately, | |
1374 | so we do not get a reply to this command: */ | |
4014092b | 1375 | mips_request ('x', 0, 0, NULL, mips_receive_wait, NULL); |
c906108c SS |
1376 | mips_need_reply = 0; |
1377 | if (!mips_expect (" break!")) | |
d6a2e54a TT |
1378 | { |
1379 | do_cleanups (old_cleanups); | |
1380 | return -1; | |
1381 | } | |
c906108c SS |
1382 | } |
1383 | else | |
4014092b | 1384 | mips_request ('x', 0, 0, &err, mips_receive_wait, NULL); |
c906108c SS |
1385 | |
1386 | if (!mips_expect (mips_monitor_prompt)) | |
d6a2e54a TT |
1387 | { |
1388 | do_cleanups (old_cleanups); | |
1389 | return -1; | |
1390 | } | |
c906108c SS |
1391 | |
1392 | do_cleanups (old_cleanups); | |
1393 | ||
1394 | return 0; | |
1395 | } | |
1396 | ||
1397 | /* Initialize a new connection to the MIPS board, and make sure we are | |
1398 | really connected. */ | |
1399 | ||
1400 | static void | |
fba45db2 | 1401 | mips_initialize (void) |
c906108c SS |
1402 | { |
1403 | int err; | |
d6a2e54a | 1404 | struct cleanup *old_cleanups; |
c906108c SS |
1405 | int j; |
1406 | ||
1407 | /* What is this code doing here? I don't see any way it can happen, and | |
1408 | it might mean mips_initializing didn't get cleared properly. | |
1409 | So I'll make it a warning. */ | |
1410 | ||
1411 | if (mips_initializing) | |
1412 | { | |
cdefc55d | 1413 | warning (_("internal error: mips_initialize called twice")); |
c906108c SS |
1414 | return; |
1415 | } | |
1416 | ||
d6a2e54a TT |
1417 | old_cleanups = make_cleanup (mips_initialize_cleanups, NULL); |
1418 | ||
c906108c SS |
1419 | mips_wait_flag = 0; |
1420 | mips_initializing = 1; | |
1421 | ||
1422 | /* At this point, the packit protocol isn't responding. We'll try getting | |
1423 | into the monitor, and restarting the protocol. */ | |
1424 | ||
1425 | /* Force the system into the monitor. After this we *should* be at | |
1426 | the mips_monitor_prompt. */ | |
1427 | if (mips_monitor != MON_IDT) | |
0df8b418 MS |
1428 | j = 0; /* Start by checking if we are already |
1429 | at the prompt. */ | |
c906108c | 1430 | else |
0df8b418 | 1431 | j = 1; /* Start by sending a break. */ |
c906108c SS |
1432 | for (; j <= 4; j++) |
1433 | { | |
1434 | switch (j) | |
1435 | { | |
0df8b418 | 1436 | case 0: /* First, try sending a CR. */ |
2cd58942 AC |
1437 | serial_flush_input (mips_desc); |
1438 | serial_write (mips_desc, "\r", 1); | |
c5aa993b | 1439 | break; |
0df8b418 | 1440 | case 1: /* First, try sending a break. */ |
2cd58942 | 1441 | serial_send_break (mips_desc); |
c906108c | 1442 | break; |
0df8b418 | 1443 | case 2: /* Then, try a ^C. */ |
2cd58942 | 1444 | serial_write (mips_desc, "\003", 1); |
c906108c | 1445 | break; |
0df8b418 | 1446 | case 3: /* Then, try escaping from download. */ |
c906108c | 1447 | { |
c5aa993b JM |
1448 | if (mips_monitor != MON_IDT) |
1449 | { | |
1450 | char tbuff[7]; | |
1451 | ||
1452 | /* We shouldn't need to send multiple termination | |
1453 | sequences, since the target performs line (or | |
1454 | block) reads, and then processes those | |
0df8b418 | 1455 | packets. In-case we were downloading a large packet |
c5aa993b | 1456 | we flush the output buffer before inserting a |
0df8b418 | 1457 | termination sequence. */ |
2cd58942 | 1458 | serial_flush_output (mips_desc); |
c5aa993b | 1459 | sprintf (tbuff, "\r/E/E\r"); |
2cd58942 | 1460 | serial_write (mips_desc, tbuff, 6); |
c5aa993b JM |
1461 | } |
1462 | else | |
1463 | { | |
1464 | char srec[10]; | |
1465 | int i; | |
1466 | ||
1467 | /* We are possibly in binary download mode, having | |
1468 | aborted in the middle of an S-record. ^C won't | |
1469 | work because of binary mode. The only reliable way | |
1470 | out is to send enough termination packets (8 bytes) | |
1471 | to fill up and then overflow the largest size | |
1472 | S-record (255 bytes in this case). This amounts to | |
0df8b418 | 1473 | 256/8 + 1 packets. */ |
c5aa993b JM |
1474 | |
1475 | mips_make_srec (srec, '7', 0, NULL, 0); | |
1476 | ||
1477 | for (i = 1; i <= 33; i++) | |
1478 | { | |
2cd58942 | 1479 | serial_write (mips_desc, srec, 8); |
c5aa993b | 1480 | |
2cd58942 | 1481 | if (serial_readchar (mips_desc, 0) >= 0) |
c5aa993b | 1482 | break; /* Break immediatly if we get something from |
0df8b418 | 1483 | the board. */ |
c5aa993b JM |
1484 | } |
1485 | } | |
1486 | } | |
c906108c SS |
1487 | break; |
1488 | case 4: | |
cdefc55d | 1489 | mips_error (_("Failed to initialize.")); |
c906108c SS |
1490 | } |
1491 | ||
1492 | if (mips_expect (mips_monitor_prompt)) | |
1493 | break; | |
1494 | } | |
1495 | ||
1496 | if (mips_monitor != MON_IDT) | |
1497 | { | |
1498 | /* Sometimes PMON ignores the first few characters in the first | |
1499 | command sent after a load. Sending a blank command gets | |
c5aa993b | 1500 | around that. */ |
c906108c SS |
1501 | mips_send_command ("\r", -1); |
1502 | ||
1503 | /* Ensure the correct target state: */ | |
1504 | if (mips_monitor != MON_LSI) | |
1505 | mips_send_command ("set regsize 64\r", -1); | |
1506 | mips_send_command ("set hostport tty0\r", -1); | |
1507 | mips_send_command ("set brkcmd \"\"\r", -1); | |
1508 | /* Delete all the current breakpoints: */ | |
1509 | mips_send_command ("db *\r", -1); | |
1510 | /* NOTE: PMON does not have breakpoint support through the | |
0df8b418 | 1511 | "debug" mode, only at the monitor command-line. */ |
c906108c SS |
1512 | } |
1513 | ||
1514 | mips_enter_debug (); | |
1515 | ||
1516 | /* Clear all breakpoints: */ | |
1517 | if ((mips_monitor == MON_IDT | |
06b1d59c | 1518 | && mips_clear_breakpoint (-1, 0, BREAK_UNUSED) == 0) |
c906108c SS |
1519 | || mips_monitor == MON_LSI) |
1520 | monitor_supports_breakpoints = 1; | |
1521 | else | |
1522 | monitor_supports_breakpoints = 0; | |
1523 | ||
1524 | do_cleanups (old_cleanups); | |
1525 | ||
1526 | /* If this doesn't call error, we have connected; we don't care if | |
1527 | the request itself succeeds or fails. */ | |
1528 | ||
4014092b | 1529 | mips_request ('r', 0, 0, &err, mips_receive_wait, NULL); |
c906108c SS |
1530 | } |
1531 | ||
1532 | /* Open a connection to the remote board. */ | |
477c84a7 | 1533 | |
c906108c | 1534 | static void |
014f9477 | 1535 | common_open (struct target_ops *ops, const char *name, int from_tty, |
98691afe AC |
1536 | enum mips_monitor_type new_monitor, |
1537 | const char *new_monitor_prompt) | |
c906108c | 1538 | { |
c906108c SS |
1539 | char *serial_port_name; |
1540 | char *remote_name = 0; | |
1541 | char *local_name = 0; | |
1542 | char **argv; | |
d6a2e54a | 1543 | struct cleanup *cleanup; |
c906108c SS |
1544 | |
1545 | if (name == 0) | |
0df8b418 MS |
1546 | error (_("\ |
1547 | To open a MIPS remote debugging connection, you need to specify what\n\ | |
1548 | serial device is attached to the target board (e.g., /dev/ttya).\n\ | |
1549 | If you want to use TFTP to download to the board, specify the name of a\n\ | |
1550 | temporary file to be used by GDB for downloads as the second argument.\n\ | |
1551 | This filename must be in the form host:filename, where host is the name\n\ | |
1552 | of the host running the TFTP server, and the file must be readable by the\n\ | |
1553 | world. If the local name of the temporary file differs from the name as\n\ | |
1554 | seen from the board via TFTP, specify that name as the third parameter.\n")); | |
c906108c SS |
1555 | |
1556 | /* Parse the serial port name, the optional TFTP name, and the | |
1557 | optional local TFTP name. */ | |
d1a41061 | 1558 | argv = gdb_buildargv (name); |
d6a2e54a | 1559 | cleanup = make_cleanup_freeargv (argv); |
c906108c | 1560 | |
4fcf66da | 1561 | serial_port_name = xstrdup (argv[0]); |
0df8b418 | 1562 | if (argv[1]) /* Remote TFTP name specified? */ |
c906108c SS |
1563 | { |
1564 | remote_name = argv[1]; | |
0df8b418 | 1565 | if (argv[2]) /* Local TFTP filename specified? */ |
c906108c SS |
1566 | local_name = argv[2]; |
1567 | } | |
1568 | ||
1569 | target_preopen (from_tty); | |
1570 | ||
1571 | if (mips_is_open) | |
1572 | unpush_target (current_ops); | |
1573 | ||
1574 | /* Open and initialize the serial port. */ | |
2cd58942 | 1575 | mips_desc = serial_open (serial_port_name); |
819cc324 | 1576 | if (mips_desc == NULL) |
c906108c SS |
1577 | perror_with_name (serial_port_name); |
1578 | ||
1579 | if (baud_rate != -1) | |
1580 | { | |
2cd58942 | 1581 | if (serial_setbaudrate (mips_desc, baud_rate)) |
c5aa993b | 1582 | { |
2cd58942 | 1583 | serial_close (mips_desc); |
c5aa993b JM |
1584 | perror_with_name (serial_port_name); |
1585 | } | |
c906108c SS |
1586 | } |
1587 | ||
2cd58942 | 1588 | serial_raw (mips_desc); |
c906108c SS |
1589 | |
1590 | /* Open and initialize the optional download port. If it is in the form | |
1591 | hostname#portnumber, it's a UDP socket. If it is in the form | |
1592 | hostname:filename, assume it's the TFTP filename that must be | |
1593 | passed to the DDB board to tell it where to get the load file. */ | |
1594 | if (remote_name) | |
1595 | { | |
1596 | if (strchr (remote_name, '#')) | |
1597 | { | |
2cd58942 | 1598 | udp_desc = serial_open (remote_name); |
c906108c | 1599 | if (!udp_desc) |
9b20d036 | 1600 | perror_with_name (_("Unable to open UDP port")); |
c906108c SS |
1601 | udp_in_use = 1; |
1602 | } | |
1603 | else | |
1604 | { | |
1605 | /* Save the remote and local names of the TFTP temp file. If | |
1606 | the user didn't specify a local name, assume it's the same | |
1607 | as the part of the remote name after the "host:". */ | |
1608 | if (tftp_name) | |
b8c9b27d | 1609 | xfree (tftp_name); |
c906108c | 1610 | if (tftp_localname) |
b8c9b27d | 1611 | xfree (tftp_localname); |
c906108c | 1612 | if (local_name == NULL) |
c5aa993b | 1613 | if ((local_name = strchr (remote_name, ':')) != NULL) |
0df8b418 | 1614 | local_name++; /* Skip over the colon. */ |
c906108c | 1615 | if (local_name == NULL) |
0df8b418 | 1616 | local_name = remote_name; /* Local name same as remote name. */ |
4fcf66da AC |
1617 | tftp_name = xstrdup (remote_name); |
1618 | tftp_localname = xstrdup (local_name); | |
c906108c SS |
1619 | tftp_in_use = 1; |
1620 | } | |
1621 | } | |
1622 | ||
1623 | current_ops = ops; | |
1624 | mips_is_open = 1; | |
1625 | ||
1626 | /* Reset the expected monitor prompt if it's never been set before. */ | |
1627 | if (mips_monitor_prompt == NULL) | |
4fcf66da | 1628 | mips_monitor_prompt = xstrdup (new_monitor_prompt); |
c906108c SS |
1629 | mips_monitor = new_monitor; |
1630 | ||
1631 | mips_initialize (); | |
1632 | ||
1633 | if (from_tty) | |
1634 | printf_unfiltered ("Remote MIPS debugging using %s\n", serial_port_name); | |
1635 | ||
1636 | /* Switch to using remote target now. */ | |
1637 | push_target (ops); | |
1638 | ||
8eeafb51 KB |
1639 | inferior_ptid = remote_mips_ptid; |
1640 | inferior_appeared (current_inferior (), ptid_get_pid (inferior_ptid)); | |
1641 | add_thread_silent (inferior_ptid); | |
c906108c SS |
1642 | |
1643 | /* Try to figure out the processor model if possible. */ | |
691c0433 | 1644 | deprecated_mips_set_processor_regs_hack (); |
c906108c | 1645 | |
a193e397 AC |
1646 | /* This is really the job of start_remote however, that makes an |
1647 | assumption that the target is about to print out a status message | |
1648 | of some sort. That doesn't happen here (in fact, it may not be | |
1649 | possible to get the monitor to send the appropriate packet). */ | |
c906108c | 1650 | |
35f196d9 | 1651 | reinit_frame_cache (); |
c906108c | 1652 | registers_changed (); |
fb14de7b | 1653 | stop_pc = regcache_read_pc (get_current_regcache ()); |
08d72866 | 1654 | print_stack_frame (get_selected_frame (NULL), 0, SRC_AND_LOC, 1); |
b8c9b27d | 1655 | xfree (serial_port_name); |
d6a2e54a TT |
1656 | |
1657 | do_cleanups (cleanup); | |
c906108c SS |
1658 | } |
1659 | ||
477c84a7 KB |
1660 | /* Open a connection to an IDT board. */ |
1661 | ||
c906108c | 1662 | static void |
014f9477 | 1663 | mips_open (const char *name, int from_tty) |
c906108c | 1664 | { |
ef31c1ea | 1665 | const char *monitor_prompt = NULL; |
f5656ead TT |
1666 | if (gdbarch_bfd_arch_info (target_gdbarch ()) != NULL |
1667 | && gdbarch_bfd_arch_info (target_gdbarch ())->arch == bfd_arch_mips) | |
ef31c1ea | 1668 | { |
f5656ead | 1669 | switch (gdbarch_bfd_arch_info (target_gdbarch ())->mach) |
ef31c1ea AC |
1670 | { |
1671 | case bfd_mach_mips4100: | |
1672 | case bfd_mach_mips4300: | |
1673 | case bfd_mach_mips4600: | |
1674 | case bfd_mach_mips4650: | |
1675 | case bfd_mach_mips5000: | |
1676 | monitor_prompt = "<RISQ> "; | |
1677 | break; | |
1678 | } | |
1679 | } | |
1680 | if (monitor_prompt == NULL) | |
1681 | monitor_prompt = "<IDT>"; | |
1682 | common_open (&mips_ops, name, from_tty, MON_IDT, monitor_prompt); | |
c906108c SS |
1683 | } |
1684 | ||
477c84a7 KB |
1685 | /* Open a connection to a PMON board. */ |
1686 | ||
c906108c | 1687 | static void |
014f9477 | 1688 | pmon_open (const char *name, int from_tty) |
c906108c SS |
1689 | { |
1690 | common_open (&pmon_ops, name, from_tty, MON_PMON, "PMON> "); | |
1691 | } | |
1692 | ||
477c84a7 KB |
1693 | /* Open a connection to a DDB board. */ |
1694 | ||
c906108c | 1695 | static void |
014f9477 | 1696 | ddb_open (const char *name, int from_tty) |
c906108c SS |
1697 | { |
1698 | common_open (&ddb_ops, name, from_tty, MON_DDB, "NEC010>"); | |
1699 | } | |
1700 | ||
bbd2783e KB |
1701 | /* Open a connection to a rockhopper board. */ |
1702 | ||
1703 | static void | |
014f9477 | 1704 | rockhopper_open (const char *name, int from_tty) |
bbd2783e KB |
1705 | { |
1706 | common_open (&rockhopper_ops, name, from_tty, MON_ROCKHOPPER, "NEC01>"); | |
1707 | } | |
1708 | ||
477c84a7 KB |
1709 | /* Open a connection to an LSI board. */ |
1710 | ||
c906108c | 1711 | static void |
014f9477 | 1712 | lsi_open (const char *name, int from_tty) |
c906108c SS |
1713 | { |
1714 | int i; | |
1715 | ||
1716 | /* Clear the LSI breakpoint table. */ | |
1717 | for (i = 0; i < MAX_LSI_BREAKPOINTS; i++) | |
1718 | lsi_breakpoints[i].type = BREAK_UNUSED; | |
c5aa993b | 1719 | |
c906108c SS |
1720 | common_open (&lsi_ops, name, from_tty, MON_LSI, "PMON> "); |
1721 | } | |
1722 | ||
1723 | /* Close a connection to the remote board. */ | |
1724 | ||
1725 | static void | |
de90e03d | 1726 | mips_close (struct target_ops *self) |
c906108c SS |
1727 | { |
1728 | if (mips_is_open) | |
1729 | { | |
1730 | /* Get the board out of remote debugging mode. */ | |
1731 | (void) mips_exit_debug (); | |
1732 | ||
1733 | close_ports (); | |
1734 | } | |
8eeafb51 KB |
1735 | |
1736 | generic_mourn_inferior (); | |
c906108c SS |
1737 | } |
1738 | ||
1739 | /* Detach from the remote board. */ | |
1740 | ||
1741 | static void | |
52554a0e | 1742 | mips_detach (struct target_ops *ops, const char *args, int from_tty) |
c906108c SS |
1743 | { |
1744 | if (args) | |
9b20d036 | 1745 | error (_("Argument given to \"detach\" when remotely debugging.")); |
c906108c | 1746 | |
7fdc1521 | 1747 | unpush_target (ops); |
c906108c SS |
1748 | |
1749 | if (from_tty) | |
1750 | printf_unfiltered ("Ending remote MIPS debugging.\n"); | |
1751 | } | |
1752 | ||
1753 | /* Tell the target board to resume. This does not wait for a reply | |
1754 | from the board, except in the case of single-stepping on LSI boards, | |
1755 | where PMON does return a reply. */ | |
1756 | ||
1757 | static void | |
28439f5e | 1758 | mips_resume (struct target_ops *ops, |
2ea28649 | 1759 | ptid_t ptid, int step, enum gdb_signal siggnal) |
c906108c SS |
1760 | { |
1761 | int err; | |
1762 | ||
1763 | /* LSI PMON requires returns a reply packet "0x1 s 0x0 0x57f" after | |
1764 | a single step, so we wait for that. */ | |
4014092b | 1765 | mips_request (step ? 's' : 'c', 1, siggnal, |
c906108c SS |
1766 | mips_monitor == MON_LSI && step ? &err : (int *) NULL, |
1767 | mips_receive_wait, NULL); | |
1768 | } | |
1769 | ||
1770 | /* Return the signal corresponding to SIG, where SIG is the number which | |
1771 | the MIPS protocol uses for the signal. */ | |
477c84a7 | 1772 | |
2ea28649 | 1773 | static enum gdb_signal |
fba45db2 | 1774 | mips_signal_from_protocol (int sig) |
c906108c SS |
1775 | { |
1776 | /* We allow a few more signals than the IDT board actually returns, on | |
1777 | the theory that there is at least *some* hope that perhaps the numbering | |
1778 | for these signals is widely agreed upon. */ | |
1779 | if (sig <= 0 | |
1780 | || sig > 31) | |
a493e3e2 | 1781 | return GDB_SIGNAL_UNKNOWN; |
c906108c | 1782 | |
2ea28649 | 1783 | /* Don't want to use gdb_signal_from_host because we are converting |
c906108c SS |
1784 | from MIPS signal numbers, not host ones. Our internal numbers |
1785 | match the MIPS numbers for the signals the board can return, which | |
1786 | are: SIGINT, SIGSEGV, SIGBUS, SIGILL, SIGFPE, SIGTRAP. */ | |
2ea28649 | 1787 | return (enum gdb_signal) sig; |
c906108c SS |
1788 | } |
1789 | ||
bbd2783e KB |
1790 | /* Set the register designated by REGNO to the value designated by VALUE. */ |
1791 | ||
1792 | static void | |
1793 | mips_set_register (int regno, ULONGEST value) | |
1794 | { | |
e362b510 | 1795 | gdb_byte buf[MAX_REGISTER_SIZE]; |
bbd2783e KB |
1796 | struct regcache *regcache = get_current_regcache (); |
1797 | struct gdbarch *gdbarch = get_regcache_arch (regcache); | |
1798 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
1799 | ||
1800 | /* We got the number the register holds, but gdb expects to see a | |
1801 | value in the target byte ordering. */ | |
1802 | ||
1803 | if (mips_monitor != MON_ROCKHOPPER | |
1804 | && (regno == mips_regnum (gdbarch)->pc || regno < 32)) | |
1805 | /* Some 64-bit boards have monitors that only send the bottom 32 bits. | |
1806 | In such cases we can only really debug 32-bit code properly so, | |
1807 | when reading a GPR or the PC, assume that the full 64-bit | |
1808 | value is the sign extension of the lower 32 bits. */ | |
1809 | store_signed_integer (buf, register_size (gdbarch, regno), byte_order, | |
1810 | value); | |
1811 | else | |
1812 | store_unsigned_integer (buf, register_size (gdbarch, regno), byte_order, | |
1813 | value); | |
1814 | ||
1815 | regcache_raw_supply (regcache, regno, buf); | |
1816 | } | |
1817 | ||
c906108c SS |
1818 | /* Wait until the remote stops, and return a wait status. */ |
1819 | ||
39f77062 | 1820 | static ptid_t |
117de6a9 | 1821 | mips_wait (struct target_ops *ops, |
47608cb1 | 1822 | ptid_t ptid, struct target_waitstatus *status, int options) |
c906108c SS |
1823 | { |
1824 | int rstatus; | |
1825 | int err; | |
1826 | char buff[DATA_MAXLEN]; | |
bbd2783e KB |
1827 | ULONGEST rpc, rfp, rsp; |
1828 | char pc_string[17], fp_string[17], sp_string[17], flags[20]; | |
c906108c | 1829 | int nfields; |
c906108c SS |
1830 | |
1831 | interrupt_count = 0; | |
1832 | hit_watchpoint = 0; | |
1833 | ||
1834 | /* If we have not sent a single step or continue command, then the | |
1835 | board is waiting for us to do something. Return a status | |
1836 | indicating that it is stopped. */ | |
c5aa993b | 1837 | if (!mips_need_reply) |
c906108c SS |
1838 | { |
1839 | status->kind = TARGET_WAITKIND_STOPPED; | |
a493e3e2 | 1840 | status->value.sig = GDB_SIGNAL_TRAP; |
39f77062 | 1841 | return inferior_ptid; |
c906108c SS |
1842 | } |
1843 | ||
1844 | /* No timeout; we sit here as long as the program continues to execute. */ | |
1845 | mips_wait_flag = 1; | |
4014092b | 1846 | rstatus = mips_request ('\000', 0, 0, &err, -1, buff); |
c906108c SS |
1847 | mips_wait_flag = 0; |
1848 | if (err) | |
cdefc55d | 1849 | mips_error (_("Remote failure: %s"), safe_strerror (errno)); |
c906108c SS |
1850 | |
1851 | /* On returning from a continue, the PMON monitor seems to start | |
1852 | echoing back the messages we send prior to sending back the | |
0df8b418 | 1853 | ACK. The code can cope with this, but to try and avoid the |
c906108c | 1854 | unnecessary serial traffic, and "spurious" characters displayed |
0df8b418 | 1855 | to the user, we cheat and reset the debug protocol. The problems |
c906108c SS |
1856 | seems to be caused by a check on the number of arguments, and the |
1857 | command length, within the monitor causing it to echo the command | |
0df8b418 | 1858 | as a bad packet. */ |
c906108c SS |
1859 | if (mips_monitor == MON_PMON) |
1860 | { | |
1861 | mips_exit_debug (); | |
1862 | mips_enter_debug (); | |
1863 | } | |
1864 | ||
0df8b418 MS |
1865 | /* See if we got back extended status. If so, pick out the pc, fp, |
1866 | sp, etc... */ | |
c906108c | 1867 | |
0df8b418 MS |
1868 | nfields = sscanf (buff, |
1869 | "0x%*x %*c 0x%*x 0x%*x 0x%16s 0x%16s 0x%16s 0x%*x %s", | |
bbd2783e KB |
1870 | pc_string, fp_string, sp_string, flags); |
1871 | if (nfields >= 3 | |
1872 | && read_hex_value (pc_string, &rpc) | |
1873 | && read_hex_value (fp_string, &rfp) | |
1874 | && read_hex_value (sp_string, &rsp)) | |
c906108c | 1875 | { |
594f7785 | 1876 | struct regcache *regcache = get_current_regcache (); |
2eb4d78b | 1877 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
bbd2783e KB |
1878 | |
1879 | mips_set_register (gdbarch_pc_regnum (gdbarch), rpc); | |
1880 | mips_set_register (30, rfp); | |
1881 | mips_set_register (gdbarch_sp_regnum (gdbarch), rsp); | |
c906108c SS |
1882 | |
1883 | if (nfields == 9) | |
1884 | { | |
1885 | int i; | |
1886 | ||
1887 | for (i = 0; i <= 2; i++) | |
1888 | if (flags[i] == 'r' || flags[i] == 'w') | |
1889 | hit_watchpoint = 1; | |
1890 | else if (flags[i] == '\000') | |
1891 | break; | |
1892 | } | |
1893 | } | |
1894 | ||
1895 | if (strcmp (target_shortname, "lsi") == 0) | |
1896 | { | |
1897 | #if 0 | |
0df8b418 MS |
1898 | /* If this is an LSI PMON target, see if we just hit a |
1899 | hardrdware watchpoint. Right now, PMON doesn't give us | |
1900 | enough information to determine which breakpoint we hit. So | |
1901 | we have to look up the PC in our own table of breakpoints, | |
1902 | and if found, assume it's just a normal instruction fetch | |
1903 | breakpoint, not a data watchpoint. FIXME when PMON provides | |
1904 | some way to tell us what type of breakpoint it is. */ | |
c906108c | 1905 | int i; |
fb14de7b | 1906 | CORE_ADDR pc = regcache_read_pc (get_current_regcache ()); |
c906108c SS |
1907 | |
1908 | hit_watchpoint = 1; | |
1909 | for (i = 0; i < MAX_LSI_BREAKPOINTS; i++) | |
1910 | { | |
1911 | if (lsi_breakpoints[i].addr == pc | |
1912 | && lsi_breakpoints[i].type == BREAK_FETCH) | |
1913 | { | |
1914 | hit_watchpoint = 0; | |
1915 | break; | |
1916 | } | |
1917 | } | |
1918 | #else | |
1919 | /* If a data breakpoint was hit, PMON returns the following packet: | |
c5aa993b JM |
1920 | 0x1 c 0x0 0x57f 0x1 |
1921 | The return packet from an ordinary breakpoint doesn't have the | |
1922 | extra 0x01 field tacked onto the end. */ | |
c906108c SS |
1923 | if (nfields == 1 && rpc == 1) |
1924 | hit_watchpoint = 1; | |
1925 | #endif | |
1926 | } | |
1927 | ||
1928 | /* NOTE: The following (sig) numbers are defined by PMON: | |
c5aa993b JM |
1929 | SPP_SIGTRAP 5 breakpoint |
1930 | SPP_SIGINT 2 | |
1931 | SPP_SIGSEGV 11 | |
1932 | SPP_SIGBUS 10 | |
1933 | SPP_SIGILL 4 | |
1934 | SPP_SIGFPE 8 | |
1935 | SPP_SIGTERM 15 */ | |
c906108c SS |
1936 | |
1937 | /* Translate a MIPS waitstatus. We use constants here rather than WTERMSIG | |
1938 | and so on, because the constants we want here are determined by the | |
1939 | MIPS protocol and have nothing to do with what host we are running on. */ | |
1940 | if ((rstatus & 0xff) == 0) | |
1941 | { | |
1942 | status->kind = TARGET_WAITKIND_EXITED; | |
1943 | status->value.integer = (((rstatus) >> 8) & 0xff); | |
1944 | } | |
1945 | else if ((rstatus & 0xff) == 0x7f) | |
1946 | { | |
1947 | status->kind = TARGET_WAITKIND_STOPPED; | |
1948 | status->value.sig = mips_signal_from_protocol (((rstatus) >> 8) & 0xff); | |
1949 | ||
1950 | /* If the stop PC is in the _exit function, assume | |
1951 | we hit the 'break 0x3ff' instruction in _exit, so this | |
c5aa993b | 1952 | is not a normal breakpoint. */ |
c906108c SS |
1953 | if (strcmp (target_shortname, "lsi") == 0) |
1954 | { | |
2c02bd72 | 1955 | const char *func_name; |
c906108c | 1956 | CORE_ADDR func_start; |
fb14de7b | 1957 | CORE_ADDR pc = regcache_read_pc (get_current_regcache ()); |
c906108c SS |
1958 | |
1959 | find_pc_partial_function (pc, &func_name, &func_start, NULL); | |
1960 | if (func_name != NULL && strcmp (func_name, "_exit") == 0 | |
1961 | && func_start == pc) | |
1962 | status->kind = TARGET_WAITKIND_EXITED; | |
1963 | } | |
1964 | } | |
1965 | else | |
1966 | { | |
1967 | status->kind = TARGET_WAITKIND_SIGNALLED; | |
1968 | status->value.sig = mips_signal_from_protocol (rstatus & 0x7f); | |
1969 | } | |
1970 | ||
39f77062 | 1971 | return inferior_ptid; |
c906108c SS |
1972 | } |
1973 | ||
1974 | /* We have to map between the register numbers used by gdb and the | |
82e34d2f | 1975 | register numbers used by the debugging protocol. */ |
c906108c SS |
1976 | |
1977 | #define REGNO_OFFSET 96 | |
1978 | ||
1979 | static int | |
74ed0bb4 | 1980 | mips_map_regno (struct gdbarch *gdbarch, int regno) |
c906108c SS |
1981 | { |
1982 | if (regno < 32) | |
1983 | return regno; | |
74ed0bb4 MD |
1984 | if (regno >= mips_regnum (gdbarch)->fp0 |
1985 | && regno < mips_regnum (gdbarch)->fp0 + 32) | |
1986 | return regno - mips_regnum (gdbarch)->fp0 + 32; | |
1987 | else if (regno == mips_regnum (gdbarch)->pc) | |
56cea623 | 1988 | return REGNO_OFFSET + 0; |
74ed0bb4 | 1989 | else if (regno == mips_regnum (gdbarch)->cause) |
56cea623 | 1990 | return REGNO_OFFSET + 1; |
74ed0bb4 | 1991 | else if (regno == mips_regnum (gdbarch)->hi) |
56cea623 | 1992 | return REGNO_OFFSET + 2; |
74ed0bb4 | 1993 | else if (regno == mips_regnum (gdbarch)->lo) |
56cea623 | 1994 | return REGNO_OFFSET + 3; |
74ed0bb4 | 1995 | else if (regno == mips_regnum (gdbarch)->fp_control_status) |
56cea623 | 1996 | return REGNO_OFFSET + 4; |
74ed0bb4 | 1997 | else if (regno == mips_regnum (gdbarch)->fp_implementation_revision) |
56cea623 AC |
1998 | return REGNO_OFFSET + 5; |
1999 | else | |
2000 | /* FIXME: Is there a way to get the status register? */ | |
2001 | return 0; | |
c906108c SS |
2002 | } |
2003 | ||
2004 | /* Fetch the remote registers. */ | |
2005 | ||
2006 | static void | |
28439f5e PA |
2007 | mips_fetch_registers (struct target_ops *ops, |
2008 | struct regcache *regcache, int regno) | |
c906108c | 2009 | { |
2eb4d78b | 2010 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
e17a4113 | 2011 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
bbd2783e | 2012 | ULONGEST val; |
c906108c SS |
2013 | int err; |
2014 | ||
2015 | if (regno == -1) | |
2016 | { | |
2eb4d78b | 2017 | for (regno = 0; regno < gdbarch_num_regs (gdbarch); regno++) |
28439f5e | 2018 | mips_fetch_registers (ops, regcache, regno); |
c906108c SS |
2019 | return; |
2020 | } | |
2021 | ||
2eb4d78b | 2022 | if (regno == gdbarch_deprecated_fp_regnum (gdbarch) |
064f5156 UW |
2023 | || regno == MIPS_ZERO_REGNUM) |
2024 | /* gdbarch_deprecated_fp_regnum on the mips is a hack which is just | |
0ba6dca9 | 2025 | supposed to read zero (see also mips-nat.c). */ |
c906108c SS |
2026 | val = 0; |
2027 | else | |
2028 | { | |
2029 | /* If PMON doesn't support this register, don't waste serial | |
2030 | bandwidth trying to read it. */ | |
74ed0bb4 | 2031 | int pmon_reg = mips_map_regno (gdbarch, regno); |
123f5f96 | 2032 | |
c906108c SS |
2033 | if (regno != 0 && pmon_reg == 0) |
2034 | val = 0; | |
2035 | else | |
2036 | { | |
2037 | /* Unfortunately the PMON version in the Vr4300 board has been | |
0df8b418 MS |
2038 | compiled without the 64bit register access commands. This |
2039 | means we cannot get hold of the full register width. */ | |
bbd2783e KB |
2040 | if (mips_monitor == MON_DDB || mips_monitor == MON_ROCKHOPPER) |
2041 | val = mips_request ('t', pmon_reg, 0, | |
2042 | &err, mips_receive_wait, NULL); | |
c906108c | 2043 | else |
4014092b AC |
2044 | val = mips_request ('r', pmon_reg, 0, |
2045 | &err, mips_receive_wait, NULL); | |
c906108c | 2046 | if (err) |
cdefc55d | 2047 | mips_error (_("Can't read register %d: %s"), regno, |
c906108c SS |
2048 | safe_strerror (errno)); |
2049 | } | |
2050 | } | |
2051 | ||
bbd2783e | 2052 | mips_set_register (regno, val); |
c906108c SS |
2053 | } |
2054 | ||
2055 | /* Prepare to store registers. The MIPS protocol can store individual | |
2056 | registers, so this function doesn't have to do anything. */ | |
2057 | ||
2058 | static void | |
f32dbf8c | 2059 | mips_prepare_to_store (struct target_ops *self, struct regcache *regcache) |
c906108c SS |
2060 | { |
2061 | } | |
2062 | ||
2063 | /* Store remote register(s). */ | |
2064 | ||
2065 | static void | |
28439f5e PA |
2066 | mips_store_registers (struct target_ops *ops, |
2067 | struct regcache *regcache, int regno) | |
c906108c | 2068 | { |
2eb4d78b | 2069 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
56be3814 | 2070 | ULONGEST val; |
c906108c SS |
2071 | int err; |
2072 | ||
2073 | if (regno == -1) | |
2074 | { | |
2eb4d78b | 2075 | for (regno = 0; regno < gdbarch_num_regs (gdbarch); regno++) |
28439f5e | 2076 | mips_store_registers (ops, regcache, regno); |
c906108c SS |
2077 | return; |
2078 | } | |
2079 | ||
56be3814 | 2080 | regcache_cooked_read_unsigned (regcache, regno, &val); |
bbd2783e KB |
2081 | mips_request (mips_monitor == MON_ROCKHOPPER ? 'T' : 'R', |
2082 | mips_map_regno (gdbarch, regno), | |
2083 | val, | |
c906108c SS |
2084 | &err, mips_receive_wait, NULL); |
2085 | if (err) | |
cdefc55d KB |
2086 | mips_error (_("Can't write register %d: %s"), regno, |
2087 | safe_strerror (errno)); | |
c906108c SS |
2088 | } |
2089 | ||
8cfa2c71 KB |
2090 | /* Fetch a word from the target board. Return word fetched in location |
2091 | addressed by VALP. Return 0 when successful; return positive error | |
2092 | code when not. */ | |
c906108c | 2093 | |
8cfa2c71 KB |
2094 | static int |
2095 | mips_fetch_word (CORE_ADDR addr, unsigned int *valp) | |
c906108c | 2096 | { |
c906108c SS |
2097 | int err; |
2098 | ||
8cfa2c71 | 2099 | *valp = mips_request ('d', addr, 0, &err, mips_receive_wait, NULL); |
c906108c SS |
2100 | if (err) |
2101 | { | |
2102 | /* Data space failed; try instruction space. */ | |
8cfa2c71 KB |
2103 | *valp = mips_request ('i', addr, 0, &err, |
2104 | mips_receive_wait, NULL); | |
c906108c | 2105 | } |
8cfa2c71 | 2106 | return err; |
c906108c SS |
2107 | } |
2108 | ||
2109 | /* Store a word to the target board. Returns errno code or zero for | |
2110 | success. If OLD_CONTENTS is non-NULL, put the old contents of that | |
2111 | memory location there. */ | |
2112 | ||
0df8b418 | 2113 | /* FIXME! make sure only 32-bit quantities get stored! */ |
c906108c | 2114 | static int |
e17a4113 | 2115 | mips_store_word (CORE_ADDR addr, unsigned int val, int *old_contents) |
c906108c SS |
2116 | { |
2117 | int err; | |
2118 | unsigned int oldcontents; | |
2119 | ||
4014092b | 2120 | oldcontents = mips_request ('D', addr, val, &err, |
c906108c SS |
2121 | mips_receive_wait, NULL); |
2122 | if (err) | |
2123 | { | |
2124 | /* Data space failed; try instruction space. */ | |
4014092b | 2125 | oldcontents = mips_request ('I', addr, val, &err, |
c906108c SS |
2126 | mips_receive_wait, NULL); |
2127 | if (err) | |
2128 | return errno; | |
2129 | } | |
2130 | if (old_contents != NULL) | |
e17a4113 | 2131 | *old_contents = oldcontents; |
c906108c SS |
2132 | return 0; |
2133 | } | |
2134 | ||
6df1b29f PA |
2135 | /* Helper for mips_xfer_partial that handles memory transfers. |
2136 | Arguments are like target_xfer_partial. Note that the protocol | |
2137 | gives us the correct value for a longword, since it transfers | |
2138 | values in ASCII. We want the byte values, so we have to swap the | |
2139 | longword values. */ | |
c906108c | 2140 | |
4014092b AC |
2141 | static int mask_address_p = 1; |
2142 | ||
6df1b29f PA |
2143 | static enum target_xfer_status |
2144 | mips_xfer_memory (gdb_byte *readbuf, const gdb_byte *writebuf, | |
2145 | ULONGEST memaddr, ULONGEST len, ULONGEST *xfered_len) | |
c906108c | 2146 | { |
f5656ead | 2147 | enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ()); |
4014092b AC |
2148 | int i; |
2149 | CORE_ADDR addr; | |
2150 | int count; | |
948f8e3d | 2151 | gdb_byte *buffer; |
4014092b AC |
2152 | int status; |
2153 | ||
2154 | /* PMON targets do not cope well with 64 bit addresses. Mask the | |
0df8b418 | 2155 | value down to 32 bits. */ |
4014092b AC |
2156 | if (mask_address_p) |
2157 | memaddr &= (CORE_ADDR) 0xffffffff; | |
2158 | ||
c906108c | 2159 | /* Round starting address down to longword boundary. */ |
4014092b | 2160 | addr = memaddr & ~3; |
c906108c | 2161 | /* Round ending address up; get number of longwords that makes. */ |
4014092b | 2162 | count = (((memaddr + len) - addr) + 3) / 4; |
c906108c | 2163 | /* Allocate buffer of that many longwords. */ |
4014092b | 2164 | buffer = alloca (count * 4); |
c906108c | 2165 | |
6df1b29f | 2166 | if (writebuf != NULL) |
c906108c SS |
2167 | { |
2168 | /* Fill start and end extra bytes of buffer with existing data. */ | |
2169 | if (addr != memaddr || len < 4) | |
2170 | { | |
8cfa2c71 KB |
2171 | unsigned int val; |
2172 | ||
2173 | if (mips_fetch_word (addr, &val)) | |
6df1b29f | 2174 | return TARGET_XFER_E_IO; |
8cfa2c71 | 2175 | |
c906108c | 2176 | /* Need part of initial word -- fetch it. */ |
8cfa2c71 | 2177 | store_unsigned_integer (&buffer[0], 4, byte_order, val); |
c906108c SS |
2178 | } |
2179 | ||
2180 | if (count > 1) | |
2181 | { | |
8cfa2c71 KB |
2182 | unsigned int val; |
2183 | ||
c906108c SS |
2184 | /* Need part of last word -- fetch it. FIXME: we do this even |
2185 | if we don't need it. */ | |
8cfa2c71 | 2186 | if (mips_fetch_word (addr + (count - 1) * 4, &val)) |
6df1b29f | 2187 | return TARGET_XFER_E_IO; |
8cfa2c71 | 2188 | |
0df8b418 MS |
2189 | store_unsigned_integer (&buffer[(count - 1) * 4], |
2190 | 4, byte_order, val); | |
c906108c SS |
2191 | } |
2192 | ||
0df8b418 | 2193 | /* Copy data to be written over corresponding part of buffer. */ |
c906108c | 2194 | |
6df1b29f | 2195 | memcpy ((char *) buffer + (memaddr & 3), writebuf, len); |
c906108c SS |
2196 | |
2197 | /* Write the entire buffer. */ | |
2198 | ||
2199 | for (i = 0; i < count; i++, addr += 4) | |
2200 | { | |
e17a4113 | 2201 | int word; |
123f5f96 | 2202 | |
e17a4113 UW |
2203 | word = extract_unsigned_integer (&buffer[i * 4], 4, byte_order); |
2204 | status = mips_store_word (addr, word, NULL); | |
0df8b418 | 2205 | /* Report each kilobyte (we download 32-bit words at a time). */ |
c5aa993b | 2206 | if (i % 256 == 255) |
c906108c SS |
2207 | { |
2208 | printf_unfiltered ("*"); | |
2209 | gdb_flush (gdb_stdout); | |
2210 | } | |
2211 | if (status) | |
6df1b29f | 2212 | return TARGET_XFER_E_IO; |
c906108c SS |
2213 | /* FIXME: Do we want a QUIT here? */ |
2214 | } | |
2215 | if (count >= 256) | |
2216 | printf_unfiltered ("\n"); | |
2217 | } | |
2218 | else | |
2219 | { | |
0df8b418 | 2220 | /* Read all the longwords. */ |
c906108c SS |
2221 | for (i = 0; i < count; i++, addr += 4) |
2222 | { | |
8cfa2c71 KB |
2223 | unsigned int val; |
2224 | ||
2225 | if (mips_fetch_word (addr, &val)) | |
6df1b29f | 2226 | return TARGET_XFER_E_IO; |
8cfa2c71 KB |
2227 | |
2228 | store_unsigned_integer (&buffer[i * 4], 4, byte_order, val); | |
c906108c SS |
2229 | QUIT; |
2230 | } | |
2231 | ||
2232 | /* Copy appropriate bytes out of the buffer. */ | |
6df1b29f | 2233 | memcpy (readbuf, buffer + (memaddr & 3), len); |
c906108c | 2234 | } |
5ee8a82c YQ |
2235 | *xfered_len = len; |
2236 | return TARGET_XFER_OK; | |
c906108c SS |
2237 | } |
2238 | ||
6df1b29f PA |
2239 | /* Target to_xfer_partial implementation. */ |
2240 | ||
2241 | static enum target_xfer_status | |
2242 | mips_xfer_partial (struct target_ops *ops, enum target_object object, | |
2243 | const char *annex, gdb_byte *readbuf, | |
2244 | const gdb_byte *writebuf, ULONGEST offset, ULONGEST len, | |
2245 | ULONGEST *xfered_len) | |
2246 | { | |
2247 | switch (object) | |
2248 | { | |
2249 | case TARGET_OBJECT_MEMORY: | |
2250 | return mips_xfer_memory (readbuf, writebuf, offset, len, xfered_len); | |
2251 | ||
2252 | default: | |
2253 | return ops->beneath->to_xfer_partial (ops->beneath, object, annex, | |
2254 | readbuf, writebuf, offset, len, | |
2255 | xfered_len); | |
2256 | } | |
2257 | } | |
2258 | ||
c906108c SS |
2259 | /* Print info on this target. */ |
2260 | ||
2261 | static void | |
fba45db2 | 2262 | mips_files_info (struct target_ops *ignore) |
c906108c SS |
2263 | { |
2264 | printf_unfiltered ("Debugging a MIPS board over a serial line.\n"); | |
2265 | } | |
2266 | ||
2267 | /* Kill the process running on the board. This will actually only | |
2268 | work if we are doing remote debugging over the console input. I | |
2269 | think that if IDT/sim had the remote debug interrupt enabled on the | |
2270 | right port, we could interrupt the process with a break signal. */ | |
2271 | ||
2272 | static void | |
7d85a9c0 | 2273 | mips_kill (struct target_ops *ops) |
c906108c SS |
2274 | { |
2275 | if (!mips_wait_flag) | |
8eeafb51 KB |
2276 | { |
2277 | target_mourn_inferior (); | |
2278 | return; | |
2279 | } | |
c906108c SS |
2280 | |
2281 | interrupt_count++; | |
2282 | ||
2283 | if (interrupt_count >= 2) | |
2284 | { | |
2285 | interrupt_count = 0; | |
2286 | ||
2287 | target_terminal_ours (); | |
2288 | ||
9e2f0ad4 HZ |
2289 | if (query (_("Interrupted while waiting for the program.\n\ |
2290 | Give up (and stop debugging it)? "))) | |
c906108c | 2291 | { |
0df8b418 MS |
2292 | /* Clean up in such a way that mips_close won't try to talk |
2293 | to the board (it almost surely won't work since we | |
2294 | weren't able to talk to it). */ | |
c906108c | 2295 | mips_wait_flag = 0; |
c5aa993b | 2296 | close_ports (); |
c906108c SS |
2297 | |
2298 | printf_unfiltered ("Ending remote MIPS debugging.\n"); | |
2299 | target_mourn_inferior (); | |
039e3c22 | 2300 | quit (); |
c906108c SS |
2301 | } |
2302 | ||
2303 | target_terminal_inferior (); | |
2304 | } | |
2305 | ||
2306 | if (remote_debug > 0) | |
2307 | printf_unfiltered ("Sending break\n"); | |
2308 | ||
2cd58942 | 2309 | serial_send_break (mips_desc); |
c906108c | 2310 | |
8eeafb51 KB |
2311 | target_mourn_inferior (); |
2312 | ||
c906108c SS |
2313 | #if 0 |
2314 | if (mips_is_open) | |
2315 | { | |
2316 | char cc; | |
2317 | ||
2318 | /* Send a ^C. */ | |
2319 | cc = '\003'; | |
2cd58942 | 2320 | serial_write (mips_desc, &cc, 1); |
c906108c SS |
2321 | sleep (1); |
2322 | target_mourn_inferior (); | |
2323 | } | |
2324 | #endif | |
2325 | } | |
2326 | ||
2327 | /* Start running on the target board. */ | |
2328 | ||
2329 | static void | |
383c0389 JB |
2330 | mips_create_inferior (struct target_ops *ops, char *execfile, |
2331 | char *args, char **env, int from_tty) | |
c906108c SS |
2332 | { |
2333 | CORE_ADDR entry_pt; | |
2334 | ||
2335 | if (args && *args) | |
2336 | { | |
cdefc55d KB |
2337 | warning (_("\ |
2338 | Can't pass arguments to remote MIPS board; arguments ignored.")); | |
c906108c SS |
2339 | /* And don't try to use them on the next "run" command. */ |
2340 | execute_command ("set args", 0); | |
2341 | } | |
2342 | ||
2343 | if (execfile == 0 || exec_bfd == 0) | |
9b20d036 | 2344 | error (_("No executable file specified")); |
c906108c SS |
2345 | |
2346 | entry_pt = (CORE_ADDR) bfd_get_start_address (exec_bfd); | |
2347 | ||
2348 | init_wait_for_inferior (); | |
2349 | ||
fb14de7b | 2350 | regcache_write_pc (get_current_regcache (), entry_pt); |
c906108c SS |
2351 | } |
2352 | ||
8eeafb51 KB |
2353 | /* Clean up after a process. The bulk of the work is done in mips_close(), |
2354 | which is called when unpushing the target. */ | |
c906108c SS |
2355 | |
2356 | static void | |
383c0389 | 2357 | mips_mourn_inferior (struct target_ops *ops) |
c906108c SS |
2358 | { |
2359 | if (current_ops != NULL) | |
2360 | unpush_target (current_ops); | |
c906108c SS |
2361 | } |
2362 | \f | |
2363 | /* We can write a breakpoint and read the shadow contents in one | |
2364 | operation. */ | |
2365 | ||
aaab4dba AC |
2366 | /* Insert a breakpoint. On targets that don't have built-in |
2367 | breakpoint support, we read the contents of the target location and | |
2368 | stash it, then overwrite it with a breakpoint instruction. ADDR is | |
8181d85f DJ |
2369 | the target location in the target machine. BPT is the breakpoint |
2370 | being inserted or removed, which contains memory for saving the | |
2371 | target contents. */ | |
c906108c SS |
2372 | |
2373 | static int | |
3db08215 | 2374 | mips_insert_breakpoint (struct target_ops *ops, struct gdbarch *gdbarch, |
a6d9a66e | 2375 | struct bp_target_info *bp_tgt) |
c906108c SS |
2376 | { |
2377 | if (monitor_supports_breakpoints) | |
06b1d59c MR |
2378 | return mips_set_breakpoint (bp_tgt->placed_address, MIPS_INSN32_SIZE, |
2379 | BREAK_FETCH); | |
c906108c | 2380 | else |
3db08215 | 2381 | return memory_insert_breakpoint (ops, gdbarch, bp_tgt); |
c906108c SS |
2382 | } |
2383 | ||
477c84a7 KB |
2384 | /* Remove a breakpoint. */ |
2385 | ||
c906108c | 2386 | static int |
3db08215 | 2387 | mips_remove_breakpoint (struct target_ops *ops, struct gdbarch *gdbarch, |
a6d9a66e | 2388 | struct bp_target_info *bp_tgt) |
c906108c SS |
2389 | { |
2390 | if (monitor_supports_breakpoints) | |
06b1d59c MR |
2391 | return mips_clear_breakpoint (bp_tgt->placed_address, MIPS_INSN32_SIZE, |
2392 | BREAK_FETCH); | |
c906108c | 2393 | else |
3db08215 | 2394 | return memory_remove_breakpoint (ops, gdbarch, bp_tgt); |
c906108c SS |
2395 | } |
2396 | ||
c906108c SS |
2397 | /* Tell whether this target can support a hardware breakpoint. CNT |
2398 | is the number of hardware breakpoints already installed. This | |
d92524f1 | 2399 | implements the target_can_use_hardware_watchpoint macro. */ |
c906108c | 2400 | |
693be288 | 2401 | static int |
5461485a TT |
2402 | mips_can_use_watchpoint (struct target_ops *self, |
2403 | int type, int cnt, int othertype) | |
c906108c | 2404 | { |
c5aa993b | 2405 | return cnt < MAX_LSI_BREAKPOINTS && strcmp (target_shortname, "lsi") == 0; |
c906108c SS |
2406 | } |
2407 | ||
2408 | ||
2409 | /* Compute a don't care mask for the region bounding ADDR and ADDR + LEN - 1. | |
2410 | This is used for memory ref breakpoints. */ | |
2411 | ||
2412 | static unsigned long | |
fba45db2 | 2413 | calculate_mask (CORE_ADDR addr, int len) |
c906108c SS |
2414 | { |
2415 | unsigned long mask; | |
2416 | int i; | |
2417 | ||
2418 | mask = addr ^ (addr + len - 1); | |
2419 | ||
2420 | for (i = 32; i >= 0; i--) | |
2421 | if (mask == 0) | |
2422 | break; | |
2423 | else | |
2424 | mask >>= 1; | |
2425 | ||
2426 | mask = (unsigned long) 0xffffffff >> i; | |
2427 | ||
2428 | return mask; | |
2429 | } | |
2430 | ||
2431 | ||
c906108c SS |
2432 | /* Set a data watchpoint. ADDR and LEN should be obvious. TYPE is 0 |
2433 | for a write watchpoint, 1 for a read watchpoint, or 2 for a read/write | |
0df8b418 | 2434 | watchpoint. */ |
c906108c | 2435 | |
693be288 | 2436 | static int |
7bb99c53 TT |
2437 | mips_insert_watchpoint (struct target_ops *self, |
2438 | CORE_ADDR addr, int len, int type, | |
0cf6dd15 | 2439 | struct expression *cond) |
c906108c | 2440 | { |
06b1d59c | 2441 | if (mips_set_breakpoint (addr, len, type)) |
c906108c SS |
2442 | return -1; |
2443 | ||
2444 | return 0; | |
2445 | } | |
2446 | ||
477c84a7 KB |
2447 | /* Remove a watchpoint. */ |
2448 | ||
693be288 | 2449 | static int |
11b5219a TT |
2450 | mips_remove_watchpoint (struct target_ops *self, |
2451 | CORE_ADDR addr, int len, int type, | |
0cf6dd15 | 2452 | struct expression *cond) |
c906108c | 2453 | { |
06b1d59c | 2454 | if (mips_clear_breakpoint (addr, len, type)) |
c906108c SS |
2455 | return -1; |
2456 | ||
2457 | return 0; | |
2458 | } | |
2459 | ||
477c84a7 KB |
2460 | /* Test to see if a watchpoint has been hit. Return 1 if so; return 0, |
2461 | if not. */ | |
2462 | ||
693be288 | 2463 | static int |
6a109b6b | 2464 | mips_stopped_by_watchpoint (struct target_ops *ops) |
c906108c SS |
2465 | { |
2466 | return hit_watchpoint; | |
2467 | } | |
2468 | ||
2469 | ||
2470 | /* Insert a breakpoint. */ | |
2471 | ||
2472 | static int | |
06b1d59c | 2473 | mips_set_breakpoint (CORE_ADDR addr, int len, enum break_type type) |
c906108c | 2474 | { |
06b1d59c | 2475 | return mips_common_breakpoint (1, addr, len, type); |
c906108c SS |
2476 | } |
2477 | ||
2478 | ||
2479 | /* Clear a breakpoint. */ | |
2480 | ||
2481 | static int | |
06b1d59c | 2482 | mips_clear_breakpoint (CORE_ADDR addr, int len, enum break_type type) |
c906108c | 2483 | { |
06b1d59c | 2484 | return mips_common_breakpoint (0, addr, len, type); |
c906108c SS |
2485 | } |
2486 | ||
2487 | ||
2488 | /* Check the error code from the return packet for an LSI breakpoint | |
2489 | command. If there's no error, just return 0. If it's a warning, | |
2490 | print the warning text and return 0. If it's an error, print | |
2491 | the error text and return 1. <ADDR> is the address of the breakpoint | |
0df8b418 | 2492 | that was being set. <RERRFLG> is the error code returned by PMON. |
06b1d59c | 2493 | This is a helper function for mips_common_breakpoint. */ |
c906108c SS |
2494 | |
2495 | static int | |
06b1d59c | 2496 | mips_check_lsi_error (CORE_ADDR addr, int rerrflg) |
c906108c SS |
2497 | { |
2498 | struct lsi_error *err; | |
f5656ead | 2499 | const char *saddr = paddress (target_gdbarch (), addr); |
c906108c SS |
2500 | |
2501 | if (rerrflg == 0) /* no error */ | |
2502 | return 0; | |
2503 | ||
2504 | /* Warnings can be ORed together, so check them all. */ | |
2505 | if (rerrflg & W_WARN) | |
2506 | { | |
2507 | if (monitor_warnings) | |
2508 | { | |
2509 | int found = 0; | |
123f5f96 | 2510 | |
c906108c SS |
2511 | for (err = lsi_warning_table; err->code != 0; err++) |
2512 | { | |
2513 | if ((err->code & rerrflg) == err->code) | |
2514 | { | |
2515 | found = 1; | |
06b1d59c | 2516 | fprintf_unfiltered (gdb_stderr, "\ |
5af949e3 | 2517 | mips_common_breakpoint (%s): Warning: %s\n", |
c906108c SS |
2518 | saddr, |
2519 | err->string); | |
2520 | } | |
2521 | } | |
2522 | if (!found) | |
06b1d59c | 2523 | fprintf_unfiltered (gdb_stderr, "\ |
5af949e3 | 2524 | mips_common_breakpoint (%s): Unknown warning: 0x%x\n", |
c906108c SS |
2525 | saddr, |
2526 | rerrflg); | |
2527 | } | |
2528 | return 0; | |
2529 | } | |
2530 | ||
2531 | /* Errors are unique, i.e. can't be ORed together. */ | |
2532 | for (err = lsi_error_table; err->code != 0; err++) | |
2533 | { | |
2534 | if ((err->code & rerrflg) == err->code) | |
2535 | { | |
06b1d59c | 2536 | fprintf_unfiltered (gdb_stderr, "\ |
5af949e3 | 2537 | mips_common_breakpoint (%s): Error: %s\n", |
c906108c SS |
2538 | saddr, |
2539 | err->string); | |
2540 | return 1; | |
2541 | } | |
2542 | } | |
06b1d59c | 2543 | fprintf_unfiltered (gdb_stderr, "\ |
5af949e3 | 2544 | mips_common_breakpoint (%s): Unknown error: 0x%x\n", |
c906108c SS |
2545 | saddr, |
2546 | rerrflg); | |
2547 | return 1; | |
2548 | } | |
2549 | ||
2550 | ||
2551 | /* This routine sends a breakpoint command to the remote target. | |
2552 | ||
2553 | <SET> is 1 if setting a breakpoint, or 0 if clearing a breakpoint. | |
2554 | <ADDR> is the address of the breakpoint. | |
2555 | <LEN> the length of the region to break on. | |
2556 | <TYPE> is the type of breakpoint: | |
c5aa993b JM |
2557 | 0 = write (BREAK_WRITE) |
2558 | 1 = read (BREAK_READ) | |
2559 | 2 = read/write (BREAK_ACCESS) | |
2560 | 3 = instruction fetch (BREAK_FETCH) | |
c906108c SS |
2561 | |
2562 | Return 0 if successful; otherwise 1. */ | |
2563 | ||
2564 | static int | |
06b1d59c | 2565 | mips_common_breakpoint (int set, CORE_ADDR addr, int len, enum break_type type) |
c906108c | 2566 | { |
f5656ead | 2567 | int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8; |
c906108c SS |
2568 | char buf[DATA_MAXLEN + 1]; |
2569 | char cmd, rcmd; | |
2570 | int rpid, rerrflg, rresponse, rlen; | |
2571 | int nfields; | |
2572 | ||
f5656ead | 2573 | addr = gdbarch_addr_bits_remove (target_gdbarch (), addr); |
c906108c SS |
2574 | |
2575 | if (mips_monitor == MON_LSI) | |
2576 | { | |
c5aa993b | 2577 | if (set == 0) /* clear breakpoint */ |
c906108c SS |
2578 | { |
2579 | /* The LSI PMON "clear breakpoint" has this form: | |
c5aa993b JM |
2580 | <pid> 'b' <bptn> 0x0 |
2581 | reply: | |
2582 | <pid> 'b' 0x0 <code> | |
c906108c SS |
2583 | |
2584 | <bptn> is a breakpoint number returned by an earlier 'B' command. | |
2585 | Possible return codes: OK, E_BPT. */ | |
2586 | ||
2587 | int i; | |
2588 | ||
2589 | /* Search for the breakpoint in the table. */ | |
2590 | for (i = 0; i < MAX_LSI_BREAKPOINTS; i++) | |
2591 | if (lsi_breakpoints[i].type == type | |
2592 | && lsi_breakpoints[i].addr == addr | |
2593 | && lsi_breakpoints[i].len == len) | |
2594 | break; | |
2595 | ||
2596 | /* Clear the table entry and tell PMON to clear the breakpoint. */ | |
2597 | if (i == MAX_LSI_BREAKPOINTS) | |
2598 | { | |
cdefc55d KB |
2599 | warning (_("\ |
2600 | mips_common_breakpoint: Attempt to clear bogus breakpoint at %s"), | |
f5656ead | 2601 | paddress (target_gdbarch (), addr)); |
c906108c SS |
2602 | return 1; |
2603 | } | |
2604 | ||
2605 | lsi_breakpoints[i].type = BREAK_UNUSED; | |
2606 | sprintf (buf, "0x0 b 0x%x 0x0", i); | |
2607 | mips_send_packet (buf, 1); | |
2608 | ||
2609 | rlen = mips_receive_packet (buf, 1, mips_receive_wait); | |
2610 | buf[rlen] = '\0'; | |
2611 | ||
2612 | nfields = sscanf (buf, "0x%x b 0x0 0x%x", &rpid, &rerrflg); | |
2613 | if (nfields != 2) | |
cdefc55d KB |
2614 | mips_error (_("mips_common_breakpoint: " |
2615 | "Bad response from remote board: %s"), | |
06b1d59c | 2616 | buf); |
c906108c | 2617 | |
06b1d59c | 2618 | return (mips_check_lsi_error (addr, rerrflg)); |
c906108c | 2619 | } |
c5aa993b JM |
2620 | else |
2621 | /* set a breakpoint */ | |
c906108c SS |
2622 | { |
2623 | /* The LSI PMON "set breakpoint" command has this form: | |
c5aa993b JM |
2624 | <pid> 'B' <addr> 0x0 |
2625 | reply: | |
2626 | <pid> 'B' <bptn> <code> | |
c906108c SS |
2627 | |
2628 | The "set data breakpoint" command has this form: | |
2629 | ||
c5aa993b | 2630 | <pid> 'A' <addr1> <type> [<addr2> [<value>]] |
c906108c | 2631 | |
c5aa993b JM |
2632 | where: type= "0x1" = read |
2633 | "0x2" = write | |
2634 | "0x3" = access (read or write) | |
c906108c SS |
2635 | |
2636 | The reply returns two values: | |
c5aa993b JM |
2637 | bptn - a breakpoint number, which is a small integer with |
2638 | possible values of zero through 255. | |
2639 | code - an error return code, a value of zero indicates a | |
2640 | succesful completion, other values indicate various | |
2641 | errors and warnings. | |
2642 | ||
0df8b418 | 2643 | Possible return codes: OK, W_QAL, E_QAL, E_OUT, E_NON. */ |
c906108c SS |
2644 | |
2645 | if (type == BREAK_FETCH) /* instruction breakpoint */ | |
2646 | { | |
2647 | cmd = 'B'; | |
5af949e3 | 2648 | sprintf (buf, "0x0 B 0x%s 0x0", phex_nz (addr, addr_size)); |
c906108c | 2649 | } |
c5aa993b JM |
2650 | else |
2651 | /* watchpoint */ | |
c906108c SS |
2652 | { |
2653 | cmd = 'A'; | |
5af949e3 UW |
2654 | sprintf (buf, "0x0 A 0x%s 0x%x 0x%s", |
2655 | phex_nz (addr, addr_size), | |
2656 | type == BREAK_READ ? 1 : (type == BREAK_WRITE ? 2 : 3), | |
2657 | phex_nz (addr + len - 1, addr_size)); | |
c906108c SS |
2658 | } |
2659 | mips_send_packet (buf, 1); | |
2660 | ||
2661 | rlen = mips_receive_packet (buf, 1, mips_receive_wait); | |
2662 | buf[rlen] = '\0'; | |
2663 | ||
2664 | nfields = sscanf (buf, "0x%x %c 0x%x 0x%x", | |
2665 | &rpid, &rcmd, &rresponse, &rerrflg); | |
2666 | if (nfields != 4 || rcmd != cmd || rresponse > 255) | |
cdefc55d KB |
2667 | mips_error (_("mips_common_breakpoint: " |
2668 | "Bad response from remote board: %s"), | |
06b1d59c | 2669 | buf); |
c906108c SS |
2670 | |
2671 | if (rerrflg != 0) | |
06b1d59c | 2672 | if (mips_check_lsi_error (addr, rerrflg)) |
c906108c SS |
2673 | return 1; |
2674 | ||
2675 | /* rresponse contains PMON's breakpoint number. Record the | |
2676 | information for this breakpoint so we can clear it later. */ | |
2677 | lsi_breakpoints[rresponse].type = type; | |
2678 | lsi_breakpoints[rresponse].addr = addr; | |
c5aa993b | 2679 | lsi_breakpoints[rresponse].len = len; |
c906108c SS |
2680 | |
2681 | return 0; | |
2682 | } | |
2683 | } | |
2684 | else | |
2685 | { | |
2686 | /* On non-LSI targets, the breakpoint command has this form: | |
c5aa993b JM |
2687 | 0x0 <CMD> <ADDR> <MASK> <FLAGS> |
2688 | <MASK> is a don't care mask for addresses. | |
0df8b418 MS |
2689 | <FLAGS> is any combination of `r', `w', or `f' for |
2690 | read/write/fetch. */ | |
2691 | ||
c906108c SS |
2692 | unsigned long mask; |
2693 | ||
2694 | mask = calculate_mask (addr, len); | |
2695 | addr &= ~mask; | |
2696 | ||
c5aa993b JM |
2697 | if (set) /* set a breakpoint */ |
2698 | { | |
c906108c | 2699 | char *flags; |
123f5f96 | 2700 | |
c906108c SS |
2701 | switch (type) |
2702 | { | |
c5aa993b | 2703 | case BREAK_WRITE: /* write */ |
c906108c SS |
2704 | flags = "w"; |
2705 | break; | |
c5aa993b | 2706 | case BREAK_READ: /* read */ |
c906108c SS |
2707 | flags = "r"; |
2708 | break; | |
c5aa993b | 2709 | case BREAK_ACCESS: /* read/write */ |
c906108c SS |
2710 | flags = "rw"; |
2711 | break; | |
c5aa993b | 2712 | case BREAK_FETCH: /* fetch */ |
c906108c SS |
2713 | flags = "f"; |
2714 | break; | |
2715 | default: | |
0df8b418 MS |
2716 | internal_error (__FILE__, __LINE__, |
2717 | _("failed internal consistency check")); | |
c906108c SS |
2718 | } |
2719 | ||
2720 | cmd = 'B'; | |
5af949e3 UW |
2721 | sprintf (buf, "0x0 B 0x%s 0x%s %s", phex_nz (addr, addr_size), |
2722 | phex_nz (mask, addr_size), flags); | |
c906108c SS |
2723 | } |
2724 | else | |
2725 | { | |
2726 | cmd = 'b'; | |
5af949e3 | 2727 | sprintf (buf, "0x0 b 0x%s", phex_nz (addr, addr_size)); |
c906108c SS |
2728 | } |
2729 | ||
2730 | mips_send_packet (buf, 1); | |
2731 | ||
2732 | rlen = mips_receive_packet (buf, 1, mips_receive_wait); | |
2733 | buf[rlen] = '\0'; | |
2734 | ||
2735 | nfields = sscanf (buf, "0x%x %c 0x%x 0x%x", | |
2736 | &rpid, &rcmd, &rerrflg, &rresponse); | |
2737 | ||
2738 | if (nfields != 4 || rcmd != cmd) | |
cdefc55d KB |
2739 | mips_error (_("mips_common_breakpoint: " |
2740 | "Bad response from remote board: %s"), | |
c906108c SS |
2741 | buf); |
2742 | ||
2743 | if (rerrflg != 0) | |
2744 | { | |
2745 | /* Ddb returns "0x0 b 0x16 0x0\000", whereas | |
2746 | Cogent returns "0x0 b 0xffffffff 0x16\000": */ | |
2747 | if (mips_monitor == MON_DDB) | |
2748 | rresponse = rerrflg; | |
c5aa993b | 2749 | if (rresponse != 22) /* invalid argument */ |
06b1d59c | 2750 | fprintf_unfiltered (gdb_stderr, "\ |
5af949e3 | 2751 | mips_common_breakpoint (%s): Got error: 0x%x\n", |
f5656ead | 2752 | paddress (target_gdbarch (), addr), rresponse); |
c906108c SS |
2753 | return 1; |
2754 | } | |
2755 | } | |
2756 | return 0; | |
2757 | } | |
2758 | \f | |
477c84a7 KB |
2759 | /* Send one S record as specified by SREC of length LEN, starting |
2760 | at ADDR. Note, however, that ADDR is not used except to provide | |
2761 | a useful message to the user in the event that a NACK is received | |
2762 | from the board. */ | |
2763 | ||
c906108c | 2764 | static void |
fba45db2 | 2765 | send_srec (char *srec, int len, CORE_ADDR addr) |
c906108c SS |
2766 | { |
2767 | while (1) | |
2768 | { | |
2769 | int ch; | |
2770 | ||
2cd58942 | 2771 | serial_write (mips_desc, srec, len); |
c906108c | 2772 | |
688991e6 | 2773 | ch = mips_readchar (remote_timeout); |
c906108c SS |
2774 | |
2775 | switch (ch) | |
2776 | { | |
2777 | case SERIAL_TIMEOUT: | |
9b20d036 | 2778 | error (_("Timeout during download.")); |
c906108c SS |
2779 | break; |
2780 | case 0x6: /* ACK */ | |
2781 | return; | |
2782 | case 0x15: /* NACK */ | |
0df8b418 MS |
2783 | fprintf_unfiltered (gdb_stderr, |
2784 | "Download got a NACK at byte %s! Retrying.\n", | |
f5656ead | 2785 | paddress (target_gdbarch (), addr)); |
c906108c SS |
2786 | continue; |
2787 | default: | |
cdefc55d | 2788 | error (_("Download got unexpected ack char: 0x%x, retrying."), |
9b20d036 | 2789 | ch); |
c906108c SS |
2790 | } |
2791 | } | |
2792 | } | |
2793 | ||
0df8b418 | 2794 | /* Download a binary file by converting it to S records. */ |
c906108c SS |
2795 | |
2796 | static void | |
9cbe5fff | 2797 | mips_load_srec (const char *args) |
c906108c SS |
2798 | { |
2799 | bfd *abfd; | |
2800 | asection *s; | |
ce6ec7d8 PA |
2801 | char srec[1024]; |
2802 | bfd_byte *buffer; | |
c906108c SS |
2803 | unsigned int i; |
2804 | unsigned int srec_frame = 200; | |
2805 | int reclen; | |
d6ad71ba | 2806 | struct cleanup *cleanup; |
c906108c SS |
2807 | static int hashmark = 1; |
2808 | ||
2809 | buffer = alloca (srec_frame * 2 + 256); | |
2810 | ||
1c00ec6b | 2811 | abfd = gdb_bfd_open (args, NULL, -1); |
c906108c SS |
2812 | if (!abfd) |
2813 | { | |
2814 | printf_filtered ("Unable to open file %s\n", args); | |
2815 | return; | |
2816 | } | |
2817 | ||
f9a062ff | 2818 | cleanup = make_cleanup_bfd_unref (abfd); |
c906108c SS |
2819 | if (bfd_check_format (abfd, bfd_object) == 0) |
2820 | { | |
2821 | printf_filtered ("File is not an object file\n"); | |
d6ad71ba | 2822 | do_cleanups (cleanup); |
c906108c SS |
2823 | return; |
2824 | } | |
2825 | ||
2826 | /* This actually causes a download in the IDT binary format: */ | |
2827 | mips_send_command (LOAD_CMD, 0); | |
2828 | ||
2829 | for (s = abfd->sections; s; s = s->next) | |
2830 | { | |
2831 | if (s->flags & SEC_LOAD) | |
2832 | { | |
2833 | unsigned int numbytes; | |
2834 | ||
0df8b418 | 2835 | /* FIXME! vma too small????? */ |
d4f3574e SS |
2836 | printf_filtered ("%s\t: 0x%4lx .. 0x%4lx ", s->name, |
2837 | (long) s->vma, | |
2c500098 | 2838 | (long) (s->vma + bfd_get_section_size (s))); |
c906108c SS |
2839 | gdb_flush (gdb_stdout); |
2840 | ||
2c500098 | 2841 | for (i = 0; i < bfd_get_section_size (s); i += numbytes) |
c906108c | 2842 | { |
2c500098 | 2843 | numbytes = min (srec_frame, bfd_get_section_size (s) - i); |
c906108c SS |
2844 | |
2845 | bfd_get_section_contents (abfd, s, buffer, i, numbytes); | |
2846 | ||
1fa79fac MS |
2847 | reclen = mips_make_srec (srec, '3', s->vma + i, |
2848 | buffer, numbytes); | |
c906108c SS |
2849 | send_srec (srec, reclen, s->vma + i); |
2850 | ||
9a4105ab AC |
2851 | if (deprecated_ui_load_progress_hook) |
2852 | deprecated_ui_load_progress_hook (s->name, i); | |
7829b833 | 2853 | |
c906108c SS |
2854 | if (hashmark) |
2855 | { | |
2856 | putchar_unfiltered ('#'); | |
2857 | gdb_flush (gdb_stdout); | |
2858 | } | |
2859 | ||
c5aa993b JM |
2860 | } /* Per-packet (or S-record) loop */ |
2861 | ||
c906108c | 2862 | putchar_unfiltered ('\n'); |
c5aa993b | 2863 | } /* Loadable sections */ |
c906108c | 2864 | } |
c5aa993b | 2865 | if (hashmark) |
c906108c | 2866 | putchar_unfiltered ('\n'); |
c5aa993b | 2867 | |
c906108c SS |
2868 | /* Write a type 7 terminator record. no data for a type 7, and there |
2869 | is no data, so len is 0. */ | |
2870 | ||
2871 | reclen = mips_make_srec (srec, '7', abfd->start_address, NULL, 0); | |
2872 | ||
2873 | send_srec (srec, reclen, abfd->start_address); | |
2874 | ||
2cd58942 | 2875 | serial_flush_input (mips_desc); |
d6ad71ba | 2876 | do_cleanups (cleanup); |
c906108c SS |
2877 | } |
2878 | ||
2879 | /* | |
0df8b418 | 2880 | * mips_make_srec -- make an srecord. This writes each line, one at a |
c5aa993b JM |
2881 | * time, each with it's own header and trailer line. |
2882 | * An srecord looks like this: | |
c906108c SS |
2883 | * |
2884 | * byte count-+ address | |
2885 | * start ---+ | | data +- checksum | |
c5aa993b JM |
2886 | * | | | | |
2887 | * S01000006F6B692D746573742E73726563E4 | |
2888 | * S315000448600000000000000000FC00005900000000E9 | |
2889 | * S31A0004000023C1400037DE00F023604000377B009020825000348D | |
2890 | * S30B0004485A0000000000004E | |
2891 | * S70500040000F6 | |
c906108c | 2892 | * |
c5aa993b | 2893 | * S<type><length><address><data><checksum> |
c906108c SS |
2894 | * |
2895 | * Where | |
2896 | * - length | |
0df8b418 | 2897 | * is the number of bytes following upto the checksum. Note that |
c906108c SS |
2898 | * this is not the number of chars following, since it takes two |
2899 | * chars to represent a byte. | |
2900 | * - type | |
2901 | * is one of: | |
2902 | * 0) header record | |
2903 | * 1) two byte address data record | |
2904 | * 2) three byte address data record | |
2905 | * 3) four byte address data record | |
2906 | * 7) four byte address termination record | |
2907 | * 8) three byte address termination record | |
2908 | * 9) two byte address termination record | |
2909 | * | |
2910 | * - address | |
2911 | * is the start address of the data following, or in the case of | |
2912 | * a termination record, the start address of the image | |
2913 | * - data | |
2914 | * is the data. | |
2915 | * - checksum | |
c5aa993b | 2916 | * is the sum of all the raw byte data in the record, from the length |
c906108c SS |
2917 | * upwards, modulo 256 and subtracted from 255. |
2918 | * | |
2919 | * This routine returns the length of the S-record. | |
2920 | * | |
2921 | */ | |
2922 | ||
2923 | static int | |
fba45db2 KB |
2924 | mips_make_srec (char *buf, int type, CORE_ADDR memaddr, unsigned char *myaddr, |
2925 | int len) | |
c906108c SS |
2926 | { |
2927 | unsigned char checksum; | |
2928 | int i; | |
2929 | ||
0df8b418 MS |
2930 | /* Create the header for the srec. addr_size is the number of bytes |
2931 | in the address, and 1 is the number of bytes in the count. */ | |
c906108c | 2932 | |
0df8b418 | 2933 | /* FIXME!! bigger buf required for 64-bit! */ |
c906108c SS |
2934 | buf[0] = 'S'; |
2935 | buf[1] = type; | |
2936 | buf[2] = len + 4 + 1; /* len + 4 byte address + 1 byte checksum */ | |
0df8b418 | 2937 | /* This assumes S3 style downloads (4byte addresses). There should |
c906108c | 2938 | probably be a check, or the code changed to make it more |
0df8b418 | 2939 | explicit. */ |
c906108c SS |
2940 | buf[3] = memaddr >> 24; |
2941 | buf[4] = memaddr >> 16; | |
2942 | buf[5] = memaddr >> 8; | |
2943 | buf[6] = memaddr; | |
2944 | memcpy (&buf[7], myaddr, len); | |
2945 | ||
2946 | /* Note that the checksum is calculated on the raw data, not the | |
2947 | hexified data. It includes the length, address and the data | |
2948 | portions of the packet. */ | |
2949 | checksum = 0; | |
0df8b418 | 2950 | buf += 2; /* Point at length byte. */ |
c906108c SS |
2951 | for (i = 0; i < len + 4 + 1; i++) |
2952 | checksum += *buf++; | |
2953 | ||
2954 | *buf = ~checksum; | |
2955 | ||
2956 | return len + 8; | |
2957 | } | |
2958 | ||
2959 | /* The following manifest controls whether we enable the simple flow | |
0df8b418 MS |
2960 | control support provided by the monitor. If enabled the code will |
2961 | wait for an affirmative ACK between transmitting packets. */ | |
c906108c SS |
2962 | #define DOETXACK (1) |
2963 | ||
2964 | /* The PMON fast-download uses an encoded packet format constructed of | |
2965 | 3byte data packets (encoded as 4 printable ASCII characters), and | |
2966 | escape sequences (preceded by a '/'): | |
2967 | ||
c5aa993b JM |
2968 | 'K' clear checksum |
2969 | 'C' compare checksum (12bit value, not included in checksum calculation) | |
0df8b418 MS |
2970 | 'S' define symbol name (for addr) terminated with "," |
2971 | and padded to 4char boundary | |
c5aa993b JM |
2972 | 'Z' zero fill multiple of 3bytes |
2973 | 'B' byte (12bit encoded value, of 8bit data) | |
2974 | 'A' address (36bit encoded value) | |
2975 | 'E' define entry as original address, and exit load | |
c906108c SS |
2976 | |
2977 | The packets are processed in 4 character chunks, so the escape | |
2978 | sequences that do not have any data (or variable length data) | |
2979 | should be padded to a 4 character boundary. The decoder will give | |
2980 | an error if the complete message block size is not a multiple of | |
2981 | 4bytes (size of record). | |
2982 | ||
2983 | The encoding of numbers is done in 6bit fields. The 6bit value is | |
2984 | used to index into this string to get the specific character | |
2985 | encoding for the value: */ | |
0df8b418 MS |
2986 | static char encoding[] = |
2987 | "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789,."; | |
c906108c SS |
2988 | |
2989 | /* Convert the number of bits required into an encoded number, 6bits | |
2990 | at a time (range 0..63). Keep a checksum if required (passed | |
0df8b418 MS |
2991 | pointer non-NULL). The function returns the number of encoded |
2992 | characters written into the buffer. */ | |
477c84a7 | 2993 | |
c906108c | 2994 | static int |
ce6ec7d8 | 2995 | pmon_makeb64 (unsigned long v, char *p, int n, unsigned int *chksum) |
c906108c SS |
2996 | { |
2997 | int count = (n / 6); | |
2998 | ||
c5aa993b JM |
2999 | if ((n % 12) != 0) |
3000 | { | |
3001 | fprintf_unfiltered (gdb_stderr, | |
0df8b418 MS |
3002 | "Fast encoding bitcount must be a " |
3003 | "multiple of 12bits: %dbit%s\n", | |
3004 | n, (n == 1) ? "" : "s"); | |
c5aa993b JM |
3005 | return (0); |
3006 | } | |
3007 | if (n > 36) | |
3008 | { | |
3009 | fprintf_unfiltered (gdb_stderr, | |
0df8b418 MS |
3010 | "Fast encoding cannot process more " |
3011 | "than 36bits at the moment: %dbits\n", n); | |
c5aa993b JM |
3012 | return (0); |
3013 | } | |
c906108c SS |
3014 | |
3015 | /* Deal with the checksum: */ | |
c5aa993b JM |
3016 | if (chksum != NULL) |
3017 | { | |
3018 | switch (n) | |
3019 | { | |
3020 | case 36: | |
3021 | *chksum += ((v >> 24) & 0xFFF); | |
3022 | case 24: | |
3023 | *chksum += ((v >> 12) & 0xFFF); | |
3024 | case 12: | |
3025 | *chksum += ((v >> 0) & 0xFFF); | |
3026 | } | |
c906108c | 3027 | } |
c906108c | 3028 | |
c5aa993b JM |
3029 | do |
3030 | { | |
3031 | n -= 6; | |
3032 | *p++ = encoding[(v >> n) & 0x3F]; | |
3033 | } | |
3034 | while (n > 0); | |
c906108c | 3035 | |
c5aa993b | 3036 | return (count); |
c906108c SS |
3037 | } |
3038 | ||
3039 | /* Shorthand function (that could be in-lined) to output the zero-fill | |
0df8b418 | 3040 | escape sequence into the data stream. */ |
477c84a7 | 3041 | |
c906108c | 3042 | static int |
ce6ec7d8 PA |
3043 | pmon_zeroset (int recsize, char **buff, |
3044 | unsigned int *amount, unsigned int *chksum) | |
c906108c SS |
3045 | { |
3046 | int count; | |
3047 | ||
c5aa993b | 3048 | sprintf (*buff, "/Z"); |
c906108c SS |
3049 | count = pmon_makeb64 (*amount, (*buff + 2), 12, chksum); |
3050 | *buff += (count + 2); | |
3051 | *amount = 0; | |
c5aa993b | 3052 | return (recsize + count + 2); |
c906108c SS |
3053 | } |
3054 | ||
477c84a7 KB |
3055 | /* Add the checksum specified by *VALUE to end of the record under |
3056 | construction. *BUF specifies the location at which to begin | |
3057 | writing characters comprising the checksum information. RECSIZE | |
3058 | specifies the size of the record constructed thus far. (A trailing | |
3059 | NUL character may be present in the buffer holding the record, but | |
3060 | the record size does not include this character.) | |
3061 | ||
3062 | Return the total size of the record after adding the checksum escape, | |
3063 | the checksum itself, and the trailing newline. | |
3064 | ||
0df8b418 | 3065 | The checksum specified by *VALUE is zeroed out prior to returning. |
477c84a7 KB |
3066 | Additionally, *BUF is updated to refer to the location just beyond |
3067 | the record elements added by this call. */ | |
3068 | ||
c906108c | 3069 | static int |
ce6ec7d8 | 3070 | pmon_checkset (int recsize, char **buff, unsigned int *value) |
c906108c SS |
3071 | { |
3072 | int count; | |
3073 | ||
3074 | /* Add the checksum (without updating the value): */ | |
3075 | sprintf (*buff, "/C"); | |
3076 | count = pmon_makeb64 (*value, (*buff + 2), 12, NULL); | |
3077 | *buff += (count + 2); | |
3078 | sprintf (*buff, "\n"); | |
0df8b418 | 3079 | *buff += 2; /* Include zero terminator. */ |
c906108c SS |
3080 | /* Forcing a checksum validation clears the sum: */ |
3081 | *value = 0; | |
c5aa993b | 3082 | return (recsize + count + 3); |
c906108c SS |
3083 | } |
3084 | ||
3085 | /* Amount of padding we leave after at the end of the output buffer, | |
3086 | for the checksum and line termination characters: */ | |
3087 | #define CHECKSIZE (4 + 4 + 4 + 2) | |
0df8b418 | 3088 | /* zero-fill, checksum, transfer end and line termination space. */ |
c906108c SS |
3089 | |
3090 | /* The amount of binary data loaded from the object file in a single | |
3091 | operation: */ | |
3092 | #define BINCHUNK (1024) | |
3093 | ||
3094 | /* Maximum line of data accepted by the monitor: */ | |
3095 | #define MAXRECSIZE (550) | |
0df8b418 MS |
3096 | /* NOTE: This constant depends on the monitor being used. This value |
3097 | is for PMON 5.x on the Cogent Vr4300 board. */ | |
c906108c | 3098 | |
477c84a7 KB |
3099 | /* Create a FastLoad format record. |
3100 | ||
3101 | *OUTBUF is the buffer into which a FastLoad formatted record is | |
3102 | written. On return, the pointer position represented by *OUTBUF | |
3103 | is updated to point at the end of the data, i.e. the next position | |
3104 | in the buffer that may be written. No attempt is made to NUL- | |
3105 | terminate this portion of the record written to the buffer. | |
3106 | ||
3107 | INBUF contains the binary input data from which the FastLoad | |
3108 | formatted record will be built. *INPTR is an index into this | |
3109 | buffer. *INPTR is updated as the input is consumed. Thus, on | |
3110 | return, the caller has access to the position of the next input | |
3111 | byte yet to be processed. INAMOUNT is the size, in bytes, of the | |
3112 | input data. | |
3113 | ||
3114 | *RECSIZE will be written with the size of the record written to the | |
3115 | output buffer prior to returning. This size does not include a | |
3116 | NUL-termination byte as none is written to the output buffer. | |
3117 | ||
3118 | *CSUM is the output buffer checksum. It is updated as data is | |
3119 | written to the output buffer. | |
3120 | ||
3121 | *ZEROFILL is the current number of 3-byte zero sequences that have | |
3122 | been encountered. It is both an input and an output to this | |
3123 | function. */ | |
3124 | ||
c906108c | 3125 | static void |
fba45db2 KB |
3126 | pmon_make_fastrec (char **outbuf, unsigned char *inbuf, int *inptr, |
3127 | int inamount, int *recsize, unsigned int *csum, | |
3128 | unsigned int *zerofill) | |
c906108c SS |
3129 | { |
3130 | int count = 0; | |
3131 | char *p = *outbuf; | |
3132 | ||
3133 | /* This is a simple check to ensure that our data will fit within | |
0df8b418 MS |
3134 | the maximum allowable record size. Each record output is 4bytes |
3135 | in length. We must allow space for a pending zero fill command, | |
3136 | the record, and a checksum record. */ | |
c5aa993b JM |
3137 | while ((*recsize < (MAXRECSIZE - CHECKSIZE)) && ((inamount - *inptr) > 0)) |
3138 | { | |
3139 | /* Process the binary data: */ | |
3140 | if ((inamount - *inptr) < 3) | |
3141 | { | |
3142 | if (*zerofill != 0) | |
3143 | *recsize = pmon_zeroset (*recsize, &p, zerofill, csum); | |
3144 | sprintf (p, "/B"); | |
3145 | count = pmon_makeb64 (inbuf[*inptr], &p[2], 12, csum); | |
3146 | p += (2 + count); | |
3147 | *recsize += (2 + count); | |
3148 | (*inptr)++; | |
3149 | } | |
3150 | else | |
3151 | { | |
0df8b418 MS |
3152 | unsigned int value = ((inbuf[*inptr + 0] << 16) |
3153 | | (inbuf[*inptr + 1] << 8) | |
3154 | | (inbuf[*inptr + 2])); | |
123f5f96 | 3155 | |
0df8b418 | 3156 | /* Simple check for zero data. TODO: A better check would be |
c5aa993b | 3157 | to check the last, and then the middle byte for being zero |
0df8b418 | 3158 | (if the first byte is not). We could then check for |
c5aa993b JM |
3159 | following runs of zeros, and if above a certain size it is |
3160 | worth the 4 or 8 character hit of the byte insertions used | |
0df8b418 MS |
3161 | to pad to the start of the zeroes. NOTE: This also depends |
3162 | on the alignment at the end of the zero run. */ | |
c5aa993b JM |
3163 | if (value == 0x00000000) |
3164 | { | |
3165 | (*zerofill)++; | |
3166 | if (*zerofill == 0xFFF) /* 12bit counter */ | |
3167 | *recsize = pmon_zeroset (*recsize, &p, zerofill, csum); | |
3168 | } | |
3169 | else | |
3170 | { | |
3171 | if (*zerofill != 0) | |
3172 | *recsize = pmon_zeroset (*recsize, &p, zerofill, csum); | |
3173 | count = pmon_makeb64 (value, p, 24, csum); | |
3174 | p += count; | |
3175 | *recsize += count; | |
3176 | } | |
3177 | *inptr += 3; | |
3178 | } | |
c906108c | 3179 | } |
c906108c SS |
3180 | |
3181 | *outbuf = p; | |
3182 | return; | |
3183 | } | |
3184 | ||
477c84a7 KB |
3185 | /* Attempt to read an ACK. If an ACK is not read in a timely manner, |
3186 | output the message specified by MESG. Return -1 for failure, 0 | |
3187 | for success. */ | |
3188 | ||
c906108c | 3189 | static int |
fba45db2 | 3190 | pmon_check_ack (char *mesg) |
c906108c SS |
3191 | { |
3192 | #if defined(DOETXACK) | |
3193 | int c; | |
3194 | ||
3195 | if (!tftp_in_use) | |
3196 | { | |
2cd58942 | 3197 | c = serial_readchar (udp_in_use ? udp_desc : mips_desc, |
688991e6 | 3198 | remote_timeout); |
c906108c SS |
3199 | if ((c == SERIAL_TIMEOUT) || (c != 0x06)) |
3200 | { | |
3201 | fprintf_unfiltered (gdb_stderr, | |
3202 | "Failed to receive valid ACK for %s\n", mesg); | |
0df8b418 | 3203 | return (-1); /* Terminate the download. */ |
c906108c SS |
3204 | } |
3205 | } | |
3206 | #endif /* DOETXACK */ | |
c5aa993b | 3207 | return (0); |
c906108c SS |
3208 | } |
3209 | ||
3210 | /* pmon_download - Send a sequence of characters to the PMON download port, | |
3211 | which is either a serial port or a UDP socket. */ | |
3212 | ||
3213 | static void | |
fba45db2 | 3214 | pmon_start_download (void) |
c906108c SS |
3215 | { |
3216 | if (tftp_in_use) | |
3217 | { | |
3218 | /* Create the temporary download file. */ | |
3219 | if ((tftp_file = fopen (tftp_localname, "w")) == NULL) | |
3220 | perror_with_name (tftp_localname); | |
3221 | } | |
3222 | else | |
3223 | { | |
3224 | mips_send_command (udp_in_use ? LOAD_CMD_UDP : LOAD_CMD, 0); | |
3225 | mips_expect ("Downloading from "); | |
3226 | mips_expect (udp_in_use ? "udp" : "tty0"); | |
3227 | mips_expect (", ^C to abort\r\n"); | |
3228 | } | |
3229 | } | |
3230 | ||
477c84a7 KB |
3231 | /* Look for the string specified by STRING sent from the target board |
3232 | during a download operation. If the string in question is not | |
3233 | seen, output an error message, remove the temporary file, if | |
3234 | appropriate, and return 0. Otherwise, return 1 to indicate | |
3235 | success. */ | |
3236 | ||
c906108c SS |
3237 | static int |
3238 | mips_expect_download (char *string) | |
3239 | { | |
3240 | if (!mips_expect (string)) | |
3241 | { | |
3242 | fprintf_unfiltered (gdb_stderr, "Load did not complete successfully.\n"); | |
3243 | if (tftp_in_use) | |
0df8b418 | 3244 | remove (tftp_localname); /* Remove temporary file. */ |
c906108c SS |
3245 | return 0; |
3246 | } | |
3247 | else | |
3248 | return 1; | |
3249 | } | |
3250 | ||
477c84a7 KB |
3251 | /* Look for messages from the target board associated with the entry |
3252 | address. | |
3253 | ||
3254 | NOTE: This function doesn't indicate success or failure, so we | |
3255 | have no way to determine whether or not the output from the board | |
3256 | was correctly seen. However, given that other items are checked | |
3257 | after this, it seems unlikely that those checks will pass if this | |
3258 | check doesn't first (silently) pass. */ | |
3259 | ||
688991e6 AC |
3260 | static void |
3261 | pmon_check_entry_address (char *entry_address, int final) | |
3262 | { | |
0df8b418 | 3263 | char hexnumber[9]; /* Includes '\0' space. */ |
123f5f96 | 3264 | |
688991e6 AC |
3265 | mips_expect_timeout (entry_address, tftp_in_use ? 15 : remote_timeout); |
3266 | sprintf (hexnumber, "%x", final); | |
3267 | mips_expect (hexnumber); | |
3268 | mips_expect ("\r\n"); | |
3269 | } | |
3270 | ||
477c84a7 KB |
3271 | /* Look for messages from the target board showing the total number of |
3272 | bytes downloaded to the board. Output 1 for success if the tail | |
3273 | end of the message was read correctly, 0 otherwise. */ | |
3274 | ||
688991e6 AC |
3275 | static int |
3276 | pmon_check_total (int bintotal) | |
3277 | { | |
0df8b418 | 3278 | char hexnumber[9]; /* Includes '\0' space. */ |
123f5f96 | 3279 | |
688991e6 AC |
3280 | mips_expect ("\r\ntotal = 0x"); |
3281 | sprintf (hexnumber, "%x", bintotal); | |
3282 | mips_expect (hexnumber); | |
3283 | return mips_expect_download (" bytes\r\n"); | |
3284 | } | |
3285 | ||
477c84a7 KB |
3286 | /* Look for the termination messages associated with the end of |
3287 | a download to the board. | |
3288 | ||
3289 | Also, when `tftp_in_use' is set, issue the load command to the | |
3290 | board causing the file to be transferred. (This is done prior | |
3291 | to looking for the above mentioned termination messages.) */ | |
3292 | ||
c906108c | 3293 | static void |
fba45db2 | 3294 | pmon_end_download (int final, int bintotal) |
c906108c | 3295 | { |
0df8b418 | 3296 | char hexnumber[9]; /* Includes '\0' space. */ |
c906108c SS |
3297 | |
3298 | if (tftp_in_use) | |
3299 | { | |
3300 | static char *load_cmd_prefix = "load -b -s "; | |
3301 | char *cmd; | |
3302 | struct stat stbuf; | |
3303 | ||
3304 | /* Close off the temporary file containing the load data. */ | |
3305 | fclose (tftp_file); | |
3306 | tftp_file = NULL; | |
3307 | ||
3308 | /* Make the temporary file readable by the world. */ | |
3309 | if (stat (tftp_localname, &stbuf) == 0) | |
3310 | chmod (tftp_localname, stbuf.st_mode | S_IROTH); | |
3311 | ||
3312 | /* Must reinitialize the board to prevent PMON from crashing. */ | |
bbd2783e KB |
3313 | if (mips_monitor != MON_ROCKHOPPER) |
3314 | mips_send_command ("initEther\r", -1); | |
c906108c SS |
3315 | |
3316 | /* Send the load command. */ | |
3317 | cmd = xmalloc (strlen (load_cmd_prefix) + strlen (tftp_name) + 2); | |
3318 | strcpy (cmd, load_cmd_prefix); | |
3319 | strcat (cmd, tftp_name); | |
3320 | strcat (cmd, "\r"); | |
3321 | mips_send_command (cmd, 0); | |
b8c9b27d | 3322 | xfree (cmd); |
c906108c SS |
3323 | if (!mips_expect_download ("Downloading from ")) |
3324 | return; | |
3325 | if (!mips_expect_download (tftp_name)) | |
3326 | return; | |
3327 | if (!mips_expect_download (", ^C to abort\r\n")) | |
3328 | return; | |
3329 | } | |
3330 | ||
3331 | /* Wait for the stuff that PMON prints after the load has completed. | |
3332 | The timeout value for use in the tftp case (15 seconds) was picked | |
0df8b418 | 3333 | arbitrarily but might be too small for really large downloads. FIXME. */ |
688991e6 | 3334 | switch (mips_monitor) |
c906108c | 3335 | { |
688991e6 AC |
3336 | case MON_LSI: |
3337 | pmon_check_ack ("termination"); | |
3338 | pmon_check_entry_address ("Entry address is ", final); | |
3339 | if (!pmon_check_total (bintotal)) | |
3340 | return; | |
3341 | break; | |
bbd2783e KB |
3342 | case MON_ROCKHOPPER: |
3343 | if (!pmon_check_total (bintotal)) | |
3344 | return; | |
3345 | pmon_check_entry_address ("Entry Address = ", final); | |
3346 | break; | |
688991e6 AC |
3347 | default: |
3348 | pmon_check_entry_address ("Entry Address = ", final); | |
c906108c | 3349 | pmon_check_ack ("termination"); |
688991e6 AC |
3350 | if (!pmon_check_total (bintotal)) |
3351 | return; | |
3352 | break; | |
c906108c | 3353 | } |
c906108c SS |
3354 | |
3355 | if (tftp_in_use) | |
0df8b418 | 3356 | remove (tftp_localname); /* Remove temporary file. */ |
c906108c SS |
3357 | } |
3358 | ||
477c84a7 KB |
3359 | /* Write the buffer specified by BUFFER of length LENGTH to either |
3360 | the board or the temporary file that'll eventually be transferred | |
3361 | to the board. */ | |
3362 | ||
c906108c | 3363 | static void |
fba45db2 | 3364 | pmon_download (char *buffer, int length) |
c906108c SS |
3365 | { |
3366 | if (tftp_in_use) | |
2e424e08 JK |
3367 | { |
3368 | size_t written; | |
3369 | ||
3370 | written = fwrite (buffer, 1, length, tftp_file); | |
3371 | if (written < length) | |
3372 | perror_with_name (tftp_localname); | |
3373 | } | |
c906108c | 3374 | else |
2cd58942 | 3375 | serial_write (udp_in_use ? udp_desc : mips_desc, buffer, length); |
c906108c SS |
3376 | } |
3377 | ||
477c84a7 KB |
3378 | /* Open object or executable file, FILE, and send it to the board |
3379 | using the FastLoad format. */ | |
3380 | ||
c906108c | 3381 | static void |
9cbe5fff | 3382 | pmon_load_fast (const char *file) |
c906108c SS |
3383 | { |
3384 | bfd *abfd; | |
3385 | asection *s; | |
3386 | unsigned char *binbuf; | |
3387 | char *buffer; | |
3388 | int reclen; | |
3389 | unsigned int csum = 0; | |
3390 | int hashmark = !tftp_in_use; | |
3391 | int bintotal = 0; | |
3392 | int final = 0; | |
3393 | int finished = 0; | |
d6ad71ba | 3394 | struct cleanup *cleanup; |
c906108c | 3395 | |
c5aa993b JM |
3396 | buffer = (char *) xmalloc (MAXRECSIZE + 1); |
3397 | binbuf = (unsigned char *) xmalloc (BINCHUNK); | |
c906108c | 3398 | |
1c00ec6b | 3399 | abfd = gdb_bfd_open (file, NULL, -1); |
c906108c | 3400 | if (!abfd) |
c5aa993b JM |
3401 | { |
3402 | printf_filtered ("Unable to open file %s\n", file); | |
3403 | return; | |
3404 | } | |
f9a062ff | 3405 | cleanup = make_cleanup_bfd_unref (abfd); |
c906108c | 3406 | |
c5aa993b JM |
3407 | if (bfd_check_format (abfd, bfd_object) == 0) |
3408 | { | |
3409 | printf_filtered ("File is not an object file\n"); | |
d6ad71ba | 3410 | do_cleanups (cleanup); |
c5aa993b JM |
3411 | return; |
3412 | } | |
c906108c SS |
3413 | |
3414 | /* Setup the required download state: */ | |
3415 | mips_send_command ("set dlproto etxack\r", -1); | |
3416 | mips_send_command ("set dlecho off\r", -1); | |
3417 | /* NOTE: We get a "cannot set variable" message if the variable is | |
0df8b418 MS |
3418 | already defined to have the argument we give. The code doesn't |
3419 | care, since it just scans to the next prompt anyway. */ | |
c906108c | 3420 | /* Start the download: */ |
c5aa993b JM |
3421 | pmon_start_download (); |
3422 | ||
0df8b418 | 3423 | /* Zero the checksum. */ |
c5aa993b JM |
3424 | sprintf (buffer, "/Kxx\n"); |
3425 | reclen = strlen (buffer); | |
c906108c | 3426 | pmon_download (buffer, reclen); |
c5aa993b | 3427 | finished = pmon_check_ack ("/Kxx"); |
c906108c SS |
3428 | |
3429 | for (s = abfd->sections; s && !finished; s = s->next) | |
0df8b418 | 3430 | if (s->flags & SEC_LOAD) /* Only deal with loadable sections. */ |
c5aa993b | 3431 | { |
2c500098 AM |
3432 | bintotal += bfd_get_section_size (s); |
3433 | final = (s->vma + bfd_get_section_size (s)); | |
c5aa993b | 3434 | |
0df8b418 MS |
3435 | printf_filtered ("%s\t: 0x%4x .. 0x%4x ", s->name, |
3436 | (unsigned int) s->vma, | |
2c500098 | 3437 | (unsigned int) (s->vma + bfd_get_section_size (s))); |
c5aa993b JM |
3438 | gdb_flush (gdb_stdout); |
3439 | ||
0df8b418 | 3440 | /* Output the starting address. */ |
c5aa993b JM |
3441 | sprintf (buffer, "/A"); |
3442 | reclen = pmon_makeb64 (s->vma, &buffer[2], 36, &csum); | |
3443 | buffer[2 + reclen] = '\n'; | |
3444 | buffer[3 + reclen] = '\0'; | |
0df8b418 | 3445 | reclen += 3; /* For the initial escape code and carriage return. */ |
c5aa993b JM |
3446 | pmon_download (buffer, reclen); |
3447 | finished = pmon_check_ack ("/A"); | |
3448 | ||
3449 | if (!finished) | |
3450 | { | |
3451 | unsigned int binamount; | |
3452 | unsigned int zerofill = 0; | |
3453 | char *bp = buffer; | |
3454 | unsigned int i; | |
3455 | ||
3456 | reclen = 0; | |
3457 | ||
2c500098 AM |
3458 | for (i = 0; |
3459 | i < bfd_get_section_size (s) && !finished; | |
3460 | i += binamount) | |
c5aa993b JM |
3461 | { |
3462 | int binptr = 0; | |
3463 | ||
2c500098 | 3464 | binamount = min (BINCHUNK, bfd_get_section_size (s) - i); |
c5aa993b JM |
3465 | |
3466 | bfd_get_section_contents (abfd, s, binbuf, i, binamount); | |
3467 | ||
3468 | /* This keeps a rolling checksum, until we decide to output | |
3469 | the line: */ | |
3470 | for (; ((binamount - binptr) > 0);) | |
3471 | { | |
1fa79fac MS |
3472 | pmon_make_fastrec (&bp, binbuf, &binptr, binamount, |
3473 | &reclen, &csum, &zerofill); | |
c5aa993b JM |
3474 | if (reclen >= (MAXRECSIZE - CHECKSIZE)) |
3475 | { | |
3476 | reclen = pmon_checkset (reclen, &bp, &csum); | |
3477 | pmon_download (buffer, reclen); | |
3478 | finished = pmon_check_ack ("data record"); | |
3479 | if (finished) | |
3480 | { | |
0df8b418 MS |
3481 | zerofill = 0; /* Do not transmit pending |
3482 | zerofills. */ | |
c5aa993b JM |
3483 | break; |
3484 | } | |
3485 | ||
9a4105ab AC |
3486 | if (deprecated_ui_load_progress_hook) |
3487 | deprecated_ui_load_progress_hook (s->name, i); | |
7829b833 | 3488 | |
c5aa993b JM |
3489 | if (hashmark) |
3490 | { | |
3491 | putchar_unfiltered ('#'); | |
3492 | gdb_flush (gdb_stdout); | |
3493 | } | |
3494 | ||
3495 | bp = buffer; | |
3496 | reclen = 0; /* buffer processed */ | |
3497 | } | |
3498 | } | |
3499 | } | |
3500 | ||
3501 | /* Ensure no out-standing zerofill requests: */ | |
3502 | if (zerofill != 0) | |
3503 | reclen = pmon_zeroset (reclen, &bp, &zerofill, &csum); | |
3504 | ||
3505 | /* and then flush the line: */ | |
3506 | if (reclen > 0) | |
3507 | { | |
3508 | reclen = pmon_checkset (reclen, &bp, &csum); | |
3509 | /* Currently pmon_checkset outputs the line terminator by | |
3510 | default, so we write out the buffer so far: */ | |
3511 | pmon_download (buffer, reclen); | |
3512 | finished = pmon_check_ack ("record remnant"); | |
3513 | } | |
3514 | } | |
3515 | ||
3516 | putchar_unfiltered ('\n'); | |
3517 | } | |
c906108c | 3518 | |
0df8b418 MS |
3519 | /* Terminate the transfer. We know that we have an empty output |
3520 | buffer at this point. */ | |
3521 | sprintf (buffer, "/E/E\n"); /* Include dummy padding characters. */ | |
c906108c SS |
3522 | reclen = strlen (buffer); |
3523 | pmon_download (buffer, reclen); | |
3524 | ||
c5aa993b JM |
3525 | if (finished) |
3526 | { /* Ignore the termination message: */ | |
2cd58942 | 3527 | serial_flush_input (udp_in_use ? udp_desc : mips_desc); |
c5aa993b JM |
3528 | } |
3529 | else | |
3530 | { /* Deal with termination message: */ | |
3531 | pmon_end_download (final, bintotal); | |
3532 | } | |
c906108c | 3533 | |
d6ad71ba | 3534 | do_cleanups (cleanup); |
c906108c SS |
3535 | return; |
3536 | } | |
3537 | ||
0df8b418 | 3538 | /* mips_load -- download a file. */ |
c906108c SS |
3539 | |
3540 | static void | |
9cbe5fff | 3541 | mips_load (struct target_ops *self, const char *file, int from_tty) |
c906108c | 3542 | { |
fb14de7b UW |
3543 | struct regcache *regcache; |
3544 | ||
c906108c SS |
3545 | /* Get the board out of remote debugging mode. */ |
3546 | if (mips_exit_debug ()) | |
9b20d036 | 3547 | error (_("mips_load: Couldn't get into monitor mode.")); |
c906108c SS |
3548 | |
3549 | if (mips_monitor != MON_IDT) | |
c5aa993b | 3550 | pmon_load_fast (file); |
c906108c | 3551 | else |
c5aa993b | 3552 | mips_load_srec (file); |
c906108c SS |
3553 | |
3554 | mips_initialize (); | |
3555 | ||
0df8b418 | 3556 | /* Finally, make the PC point at the start address. */ |
fb14de7b | 3557 | regcache = get_current_regcache (); |
c906108c SS |
3558 | if (mips_monitor != MON_IDT) |
3559 | { | |
3560 | /* Work around problem where PMON monitor updates the PC after a load | |
0df8b418 | 3561 | to a different value than GDB thinks it has. The following ensures |
fb14de7b | 3562 | that the regcache_write_pc() WILL update the PC value: */ |
a624e111 | 3563 | regcache_invalidate (regcache, |
97b0f3e2 | 3564 | mips_regnum (get_regcache_arch (regcache))->pc); |
c906108c SS |
3565 | } |
3566 | if (exec_bfd) | |
fb14de7b | 3567 | regcache_write_pc (regcache, bfd_get_start_address (exec_bfd)); |
8eeafb51 | 3568 | } |
c906108c | 3569 | |
8eeafb51 KB |
3570 | /* Check to see if a thread is still alive. */ |
3571 | ||
3572 | static int | |
3573 | mips_thread_alive (struct target_ops *ops, ptid_t ptid) | |
3574 | { | |
3575 | if (ptid_equal (ptid, remote_mips_ptid)) | |
3576 | /* The monitor's task is always alive. */ | |
3577 | return 1; | |
c906108c | 3578 | |
8eeafb51 | 3579 | return 0; |
c906108c SS |
3580 | } |
3581 | ||
8eeafb51 KB |
3582 | /* Convert a thread ID to a string. Returns the string in a static |
3583 | buffer. */ | |
3584 | ||
3585 | static char * | |
3586 | mips_pid_to_str (struct target_ops *ops, ptid_t ptid) | |
3587 | { | |
3588 | static char buf[64]; | |
3589 | ||
3590 | if (ptid_equal (ptid, remote_mips_ptid)) | |
3591 | { | |
3592 | xsnprintf (buf, sizeof buf, "Thread <main>"); | |
3593 | return buf; | |
3594 | } | |
3595 | ||
3596 | return normal_pid_to_str (ptid); | |
3597 | } | |
c906108c SS |
3598 | |
3599 | /* Pass the command argument as a packet to PMON verbatim. */ | |
3600 | ||
3601 | static void | |
fba45db2 | 3602 | pmon_command (char *args, int from_tty) |
c906108c SS |
3603 | { |
3604 | char buf[DATA_MAXLEN + 1]; | |
3605 | int rlen; | |
3606 | ||
3607 | sprintf (buf, "0x0 %s", args); | |
3608 | mips_send_packet (buf, 1); | |
3609 | printf_filtered ("Send packet: %s\n", buf); | |
3610 | ||
3611 | rlen = mips_receive_packet (buf, 1, mips_receive_wait); | |
3612 | buf[rlen] = '\0'; | |
3613 | printf_filtered ("Received packet: %s\n", buf); | |
3614 | } | |
3615 | \f | |
0df8b418 MS |
3616 | /* -Wmissing-prototypes */ |
3617 | extern initialize_file_ftype _initialize_remote_mips; | |
a78f21af | 3618 | |
477c84a7 KB |
3619 | /* Initialize mips_ops, lsi_ops, ddb_ops, pmon_ops, and rockhopper_ops. |
3620 | Create target specific commands and perform other initializations | |
3621 | specific to this file. */ | |
3622 | ||
c906108c | 3623 | void |
fba45db2 | 3624 | _initialize_remote_mips (void) |
c906108c SS |
3625 | { |
3626 | /* Initialize the fields in mips_ops that are common to all four targets. */ | |
3627 | mips_ops.to_longname = "Remote MIPS debugging over serial line"; | |
3628 | mips_ops.to_close = mips_close; | |
3629 | mips_ops.to_detach = mips_detach; | |
3630 | mips_ops.to_resume = mips_resume; | |
3631 | mips_ops.to_fetch_registers = mips_fetch_registers; | |
3632 | mips_ops.to_store_registers = mips_store_registers; | |
3633 | mips_ops.to_prepare_to_store = mips_prepare_to_store; | |
6df1b29f | 3634 | mips_ops.to_xfer_partial = mips_xfer_partial; |
c906108c SS |
3635 | mips_ops.to_files_info = mips_files_info; |
3636 | mips_ops.to_insert_breakpoint = mips_insert_breakpoint; | |
3637 | mips_ops.to_remove_breakpoint = mips_remove_breakpoint; | |
546143b6 AC |
3638 | mips_ops.to_insert_watchpoint = mips_insert_watchpoint; |
3639 | mips_ops.to_remove_watchpoint = mips_remove_watchpoint; | |
3640 | mips_ops.to_stopped_by_watchpoint = mips_stopped_by_watchpoint; | |
3641 | mips_ops.to_can_use_hw_breakpoint = mips_can_use_watchpoint; | |
c906108c SS |
3642 | mips_ops.to_kill = mips_kill; |
3643 | mips_ops.to_load = mips_load; | |
3644 | mips_ops.to_create_inferior = mips_create_inferior; | |
3645 | mips_ops.to_mourn_inferior = mips_mourn_inferior; | |
8eeafb51 KB |
3646 | mips_ops.to_thread_alive = mips_thread_alive; |
3647 | mips_ops.to_pid_to_str = mips_pid_to_str; | |
49d03eab | 3648 | mips_ops.to_log_command = serial_log_command; |
c906108c | 3649 | mips_ops.to_stratum = process_stratum; |
c35b1492 PA |
3650 | mips_ops.to_has_all_memory = default_child_has_all_memory; |
3651 | mips_ops.to_has_memory = default_child_has_memory; | |
3652 | mips_ops.to_has_stack = default_child_has_stack; | |
3653 | mips_ops.to_has_registers = default_child_has_registers; | |
3654 | mips_ops.to_has_execution = default_child_has_execution; | |
c906108c SS |
3655 | mips_ops.to_magic = OPS_MAGIC; |
3656 | ||
3657 | /* Copy the common fields to all four target vectors. */ | |
bbd2783e | 3658 | rockhopper_ops = pmon_ops = ddb_ops = lsi_ops = mips_ops; |
c906108c SS |
3659 | |
3660 | /* Initialize target-specific fields in the target vectors. */ | |
3661 | mips_ops.to_shortname = "mips"; | |
3662 | mips_ops.to_doc = "\ | |
3663 | Debug a board using the MIPS remote debugging protocol over a serial line.\n\ | |
3664 | The argument is the device it is connected to or, if it contains a colon,\n\ | |
3665 | HOST:PORT to access a board over a network"; | |
3666 | mips_ops.to_open = mips_open; | |
3667 | mips_ops.to_wait = mips_wait; | |
3668 | ||
3669 | pmon_ops.to_shortname = "pmon"; | |
c5aa993b | 3670 | pmon_ops.to_doc = "\ |
c906108c SS |
3671 | Debug a board using the PMON MIPS remote debugging protocol over a serial\n\ |
3672 | line. The argument is the device it is connected to or, if it contains a\n\ | |
3673 | colon, HOST:PORT to access a board over a network"; | |
3674 | pmon_ops.to_open = pmon_open; | |
3675 | pmon_ops.to_wait = mips_wait; | |
3676 | ||
3677 | ddb_ops.to_shortname = "ddb"; | |
3678 | ddb_ops.to_doc = "\ | |
3679 | Debug a board using the PMON MIPS remote debugging protocol over a serial\n\ | |
3680 | line. The first argument is the device it is connected to or, if it contains\n\ | |
3681 | a colon, HOST:PORT to access a board over a network. The optional second\n\ | |
3682 | parameter is the temporary file in the form HOST:FILENAME to be used for\n\ | |
3683 | TFTP downloads to the board. The optional third parameter is the local name\n\ | |
3684 | of the TFTP temporary file, if it differs from the filename seen by the board."; | |
3685 | ddb_ops.to_open = ddb_open; | |
3686 | ddb_ops.to_wait = mips_wait; | |
3687 | ||
bbd2783e KB |
3688 | rockhopper_ops.to_shortname = "rockhopper"; |
3689 | rockhopper_ops.to_doc = ddb_ops.to_doc; | |
3690 | rockhopper_ops.to_open = rockhopper_open; | |
3691 | rockhopper_ops.to_wait = mips_wait; | |
3692 | ||
c906108c SS |
3693 | lsi_ops.to_shortname = "lsi"; |
3694 | lsi_ops.to_doc = pmon_ops.to_doc; | |
3695 | lsi_ops.to_open = lsi_open; | |
3696 | lsi_ops.to_wait = mips_wait; | |
3697 | ||
3698 | /* Add the targets. */ | |
3699 | add_target (&mips_ops); | |
3700 | add_target (&pmon_ops); | |
3701 | add_target (&ddb_ops); | |
3702 | add_target (&lsi_ops); | |
bbd2783e | 3703 | add_target (&rockhopper_ops); |
c906108c | 3704 | |
85c07804 AC |
3705 | add_setshow_zinteger_cmd ("timeout", no_class, &mips_receive_wait, _("\ |
3706 | Set timeout in seconds for remote MIPS serial I/O."), _("\ | |
3707 | Show timeout in seconds for remote MIPS serial I/O."), NULL, | |
3708 | NULL, | |
3709 | NULL, /* FIXME: i18n: */ | |
3710 | &setlist, &showlist); | |
3711 | ||
3712 | add_setshow_zinteger_cmd ("retransmit-timeout", no_class, | |
3713 | &mips_retransmit_wait, _("\ | |
3714 | Set retransmit timeout in seconds for remote MIPS serial I/O."), _("\ | |
3715 | Show retransmit timeout in seconds for remote MIPS serial I/O."), _("\ | |
c906108c | 3716 | This is the number of seconds to wait for an acknowledgement to a packet\n\ |
85c07804 AC |
3717 | before resending the packet."), |
3718 | NULL, | |
3719 | NULL, /* FIXME: i18n: */ | |
3720 | &setlist, &showlist); | |
3721 | ||
3722 | add_setshow_zinteger_cmd ("syn-garbage-limit", no_class, | |
3723 | &mips_syn_garbage, _("\ | |
3724 | Set the maximum number of characters to ignore when scanning for a SYN."), _("\ | |
3725 | Show the maximum number of characters to ignore when scanning for a SYN."), _("\ | |
c906108c | 3726 | This is the maximum number of characters GDB will ignore when trying to\n\ |
cb1a6d5f AC |
3727 | synchronize with the remote system. A value of -1 means that there is no\n\ |
3728 | limit. (Note that these characters are printed out even though they are\n\ | |
85c07804 AC |
3729 | ignored.)"), |
3730 | NULL, | |
3731 | NULL, /* FIXME: i18n: */ | |
3732 | &setlist, &showlist); | |
c906108c | 3733 | |
4d28ad1e AC |
3734 | add_setshow_string_cmd ("monitor-prompt", class_obscure, |
3735 | &mips_monitor_prompt, _("\ | |
3736 | Set the prompt that GDB expects from the monitor."), _("\ | |
3737 | Show the prompt that GDB expects from the monitor."), NULL, | |
3738 | NULL, | |
3739 | NULL, /* FIXME: i18n: */ | |
3740 | &setlist, &showlist); | |
c906108c | 3741 | |
85c07804 AC |
3742 | add_setshow_zinteger_cmd ("monitor-warnings", class_obscure, |
3743 | &monitor_warnings, _("\ | |
3744 | Set printing of monitor warnings."), _("\ | |
3745 | Show printing of monitor warnings."), _("\ | |
3746 | When enabled, monitor warnings about hardware breakpoints will be displayed."), | |
3747 | NULL, | |
3748 | NULL, /* FIXME: i18n: */ | |
3749 | &setlist, &showlist); | |
c906108c | 3750 | |
24ec834b | 3751 | add_com ("pmon", class_obscure, pmon_command, |
1bedd215 | 3752 | _("Send a packet to PMON (must be in debug mode).")); |
4014092b | 3753 | |
5bf193a2 AC |
3754 | add_setshow_boolean_cmd ("mask-address", no_class, &mask_address_p, _("\ |
3755 | Set zeroing of upper 32 bits of 64-bit addresses when talking to PMON targets."), _("\ | |
3756 | Show zeroing of upper 32 bits of 64-bit addresses when talking to PMON targets."), _("\ | |
3757 | Use \"on\" to enable the masking and \"off\" to disable it."), | |
3758 | NULL, | |
3759 | NULL, /* FIXME: i18n: */ | |
3760 | &setlist, &showlist); | |
8eeafb51 | 3761 | remote_mips_ptid = ptid_build (42000, 0, 42000); |
c906108c | 3762 | } |