Commit | Line | Data |
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c906108c | 1 | /* Remote debugging interface for MIPS remote debugging protocol. |
0a65a603 | 2 | |
6aba47ca | 3 | Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, |
9b254dd1 | 4 | 2003, 2004, 2006, 2007, 2008 Free Software Foundation, Inc. |
0a65a603 | 5 | |
c906108c SS |
6 | Contributed by Cygnus Support. Written by Ian Lance Taylor |
7 | <ian@cygnus.com>. | |
8 | ||
c5aa993b | 9 | This file is part of GDB. |
c906108c | 10 | |
c5aa993b JM |
11 | This program is free software; you can redistribute it and/or modify |
12 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 13 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 14 | (at your option) any later version. |
c906108c | 15 | |
c5aa993b JM |
16 | This program is distributed in the hope that it will be useful, |
17 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | GNU General Public License for more details. | |
c906108c | 20 | |
c5aa993b | 21 | You should have received a copy of the GNU General Public License |
a9762ec7 | 22 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
23 | |
24 | #include "defs.h" | |
25 | #include "inferior.h" | |
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" |
c906108c | 33 | #include "gdb_string.h" |
ba79cc81 | 34 | #include "gdb_stat.h" |
4e052eda | 35 | #include "regcache.h" |
59d521c1 | 36 | #include <ctype.h> |
56cea623 | 37 | #include "mips-tdep.h" |
c906108c | 38 | \f |
c5aa993b | 39 | |
c906108c SS |
40 | /* Breakpoint types. Values 0, 1, and 2 must agree with the watch |
41 | types passed by breakpoint.c to target_insert_watchpoint. | |
42 | Value 3 is our own invention, and is used for ordinary instruction | |
43 | breakpoints. Value 4 is used to mark an unused watchpoint in tables. */ | |
c5aa993b JM |
44 | enum break_type |
45 | { | |
46 | BREAK_WRITE, /* 0 */ | |
47 | BREAK_READ, /* 1 */ | |
48 | BREAK_ACCESS, /* 2 */ | |
49 | BREAK_FETCH, /* 3 */ | |
50 | BREAK_UNUSED /* 4 */ | |
51 | }; | |
c906108c SS |
52 | |
53 | /* Prototypes for local functions. */ | |
54 | ||
a14ed312 | 55 | static int mips_readchar (int timeout); |
c906108c | 56 | |
a14ed312 KB |
57 | static int mips_receive_header (unsigned char *hdr, int *pgarbage, |
58 | int ch, int timeout); | |
c906108c | 59 | |
a14ed312 KB |
60 | static int mips_receive_trailer (unsigned char *trlr, int *pgarbage, |
61 | int *pch, int timeout); | |
c906108c | 62 | |
a14ed312 KB |
63 | static int mips_cksum (const unsigned char *hdr, |
64 | const unsigned char *data, int len); | |
c906108c | 65 | |
a14ed312 | 66 | static void mips_send_packet (const char *s, int get_ack); |
c906108c | 67 | |
a14ed312 | 68 | static void mips_send_command (const char *cmd, int prompt); |
c906108c | 69 | |
a14ed312 | 70 | static int mips_receive_packet (char *buff, int throw_error, int timeout); |
c906108c | 71 | |
4014092b AC |
72 | static ULONGEST mips_request (int cmd, ULONGEST addr, ULONGEST data, |
73 | int *perr, int timeout, char *buff); | |
c906108c | 74 | |
a14ed312 | 75 | static void mips_initialize (void); |
c906108c | 76 | |
a14ed312 | 77 | static void mips_open (char *name, int from_tty); |
c906108c | 78 | |
a14ed312 | 79 | static void pmon_open (char *name, int from_tty); |
c906108c | 80 | |
a14ed312 | 81 | static void ddb_open (char *name, int from_tty); |
c906108c | 82 | |
a14ed312 | 83 | static void lsi_open (char *name, int from_tty); |
c906108c | 84 | |
a14ed312 | 85 | static void mips_close (int quitting); |
c906108c | 86 | |
136d6dae | 87 | static void mips_detach (struct target_ops *ops, char *args, int from_tty); |
c906108c | 88 | |
39f77062 KB |
89 | static void mips_resume (ptid_t ptid, int step, |
90 | enum target_signal siggnal); | |
c906108c | 91 | |
39f77062 KB |
92 | static ptid_t mips_wait (ptid_t ptid, |
93 | struct target_waitstatus *status); | |
c906108c | 94 | |
74ed0bb4 | 95 | static int mips_map_regno (struct gdbarch *, int); |
c906108c | 96 | |
56be3814 | 97 | static void mips_fetch_registers (struct regcache *regcache, int regno); |
c906108c | 98 | |
316f2060 | 99 | static void mips_prepare_to_store (struct regcache *regcache); |
c906108c | 100 | |
56be3814 | 101 | static void mips_store_registers (struct regcache *regcache, int regno); |
c906108c | 102 | |
a14ed312 | 103 | static unsigned int mips_fetch_word (CORE_ADDR addr); |
c906108c | 104 | |
a14ed312 KB |
105 | static int mips_store_word (CORE_ADDR addr, unsigned int value, |
106 | char *old_contents); | |
c906108c | 107 | |
7d12900b | 108 | static int mips_xfer_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len, |
29e57380 C |
109 | int write, |
110 | struct mem_attrib *attrib, | |
111 | struct target_ops *target); | |
c906108c | 112 | |
a14ed312 | 113 | static void mips_files_info (struct target_ops *ignore); |
c906108c | 114 | |
a14ed312 | 115 | static void mips_mourn_inferior (void); |
c906108c | 116 | |
a14ed312 | 117 | static int pmon_makeb64 (unsigned long v, char *p, int n, int *chksum); |
c906108c | 118 | |
a14ed312 KB |
119 | static int pmon_zeroset (int recsize, char **buff, int *amount, |
120 | unsigned int *chksum); | |
c906108c | 121 | |
a14ed312 | 122 | static int pmon_checkset (int recsize, char **buff, int *value); |
c906108c | 123 | |
a14ed312 KB |
124 | static void pmon_make_fastrec (char **outbuf, unsigned char *inbuf, |
125 | int *inptr, int inamount, int *recsize, | |
126 | unsigned int *csum, unsigned int *zerofill); | |
c906108c | 127 | |
a14ed312 | 128 | static int pmon_check_ack (char *mesg); |
c906108c | 129 | |
a14ed312 | 130 | static void pmon_start_download (void); |
c906108c | 131 | |
a14ed312 | 132 | static void pmon_end_download (int final, int bintotal); |
c906108c | 133 | |
a14ed312 | 134 | static void pmon_download (char *buffer, int length); |
c906108c | 135 | |
a14ed312 | 136 | static void pmon_load_fast (char *file); |
c906108c | 137 | |
a14ed312 | 138 | static void mips_load (char *file, int from_tty); |
c906108c | 139 | |
a14ed312 KB |
140 | static int mips_make_srec (char *buffer, int type, CORE_ADDR memaddr, |
141 | unsigned char *myaddr, int len); | |
c906108c | 142 | |
06b1d59c | 143 | static int mips_set_breakpoint (CORE_ADDR addr, int len, enum break_type type); |
c906108c | 144 | |
06b1d59c MR |
145 | static int mips_clear_breakpoint (CORE_ADDR addr, int len, |
146 | enum break_type type); | |
c906108c | 147 | |
06b1d59c MR |
148 | static int mips_common_breakpoint (int set, CORE_ADDR addr, int len, |
149 | enum break_type type); | |
c906108c SS |
150 | |
151 | /* Forward declarations. */ | |
152 | extern struct target_ops mips_ops; | |
153 | extern struct target_ops pmon_ops; | |
154 | extern struct target_ops ddb_ops; | |
c5aa993b | 155 | \f/* *INDENT-OFF* */ |
c906108c SS |
156 | /* The MIPS remote debugging interface is built on top of a simple |
157 | packet protocol. Each packet is organized as follows: | |
158 | ||
c5aa993b JM |
159 | SYN The first character is always a SYN (ASCII 026, or ^V). SYN |
160 | may not appear anywhere else in the packet. Any time a SYN is | |
161 | seen, a new packet should be assumed to have begun. | |
c906108c SS |
162 | |
163 | TYPE_LEN | |
c5aa993b JM |
164 | This byte contains the upper five bits of the logical length |
165 | of the data section, plus a single bit indicating whether this | |
166 | is a data packet or an acknowledgement. The documentation | |
167 | indicates that this bit is 1 for a data packet, but the actual | |
168 | board uses 1 for an acknowledgement. The value of the byte is | |
169 | 0x40 + (ack ? 0x20 : 0) + (len >> 6) | |
170 | (we always have 0 <= len < 1024). Acknowledgement packets do | |
171 | not carry data, and must have a data length of 0. | |
c906108c SS |
172 | |
173 | LEN1 This byte contains the lower six bits of the logical length of | |
c5aa993b JM |
174 | the data section. The value is |
175 | 0x40 + (len & 0x3f) | |
176 | ||
177 | SEQ This byte contains the six bit sequence number of the packet. | |
178 | The value is | |
179 | 0x40 + seq | |
180 | An acknowlegment packet contains the sequence number of the | |
181 | packet being acknowledged plus 1 modulo 64. Data packets are | |
182 | transmitted in sequence. There may only be one outstanding | |
183 | unacknowledged data packet at a time. The sequence numbers | |
184 | are independent in each direction. If an acknowledgement for | |
185 | the previous packet is received (i.e., an acknowledgement with | |
186 | the sequence number of the packet just sent) the packet just | |
187 | sent should be retransmitted. If no acknowledgement is | |
188 | received within a timeout period, the packet should be | |
189 | retransmitted. This has an unfortunate failure condition on a | |
190 | high-latency line, as a delayed acknowledgement may lead to an | |
191 | endless series of duplicate packets. | |
192 | ||
193 | DATA The actual data bytes follow. The following characters are | |
194 | escaped inline with DLE (ASCII 020, or ^P): | |
195 | SYN (026) DLE S | |
196 | DLE (020) DLE D | |
197 | ^C (003) DLE C | |
198 | ^S (023) DLE s | |
199 | ^Q (021) DLE q | |
200 | The additional DLE characters are not counted in the logical | |
201 | length stored in the TYPE_LEN and LEN1 bytes. | |
c906108c SS |
202 | |
203 | CSUM1 | |
204 | CSUM2 | |
205 | CSUM3 | |
c5aa993b JM |
206 | These bytes contain an 18 bit checksum of the complete |
207 | contents of the packet excluding the SEQ byte and the | |
208 | CSUM[123] bytes. The checksum is simply the twos complement | |
209 | addition of all the bytes treated as unsigned characters. The | |
210 | values of the checksum bytes are: | |
211 | CSUM1: 0x40 + ((cksum >> 12) & 0x3f) | |
212 | CSUM2: 0x40 + ((cksum >> 6) & 0x3f) | |
213 | CSUM3: 0x40 + (cksum & 0x3f) | |
c906108c SS |
214 | |
215 | It happens that the MIPS remote debugging protocol always | |
216 | communicates with ASCII strings. Because of this, this | |
217 | implementation doesn't bother to handle the DLE quoting mechanism, | |
218 | since it will never be required. */ | |
9846de1b | 219 | /* *INDENT-ON* */ |
c906108c | 220 | |
c5aa993b | 221 | |
c906108c SS |
222 | /* The SYN character which starts each packet. */ |
223 | #define SYN '\026' | |
224 | ||
225 | /* The 0x40 used to offset each packet (this value ensures that all of | |
226 | the header and trailer bytes, other than SYN, are printable ASCII | |
227 | characters). */ | |
228 | #define HDR_OFFSET 0x40 | |
229 | ||
230 | /* The indices of the bytes in the packet header. */ | |
231 | #define HDR_INDX_SYN 0 | |
232 | #define HDR_INDX_TYPE_LEN 1 | |
233 | #define HDR_INDX_LEN1 2 | |
234 | #define HDR_INDX_SEQ 3 | |
235 | #define HDR_LENGTH 4 | |
236 | ||
237 | /* The data/ack bit in the TYPE_LEN header byte. */ | |
238 | #define TYPE_LEN_DA_BIT 0x20 | |
239 | #define TYPE_LEN_DATA 0 | |
240 | #define TYPE_LEN_ACK TYPE_LEN_DA_BIT | |
241 | ||
242 | /* How to compute the header bytes. */ | |
243 | #define HDR_SET_SYN(data, len, seq) (SYN) | |
244 | #define HDR_SET_TYPE_LEN(data, len, seq) \ | |
245 | (HDR_OFFSET \ | |
246 | + ((data) ? TYPE_LEN_DATA : TYPE_LEN_ACK) \ | |
247 | + (((len) >> 6) & 0x1f)) | |
248 | #define HDR_SET_LEN1(data, len, seq) (HDR_OFFSET + ((len) & 0x3f)) | |
249 | #define HDR_SET_SEQ(data, len, seq) (HDR_OFFSET + (seq)) | |
250 | ||
251 | /* Check that a header byte is reasonable. */ | |
252 | #define HDR_CHECK(ch) (((ch) & HDR_OFFSET) == HDR_OFFSET) | |
253 | ||
254 | /* Get data from the header. These macros evaluate their argument | |
255 | multiple times. */ | |
256 | #define HDR_IS_DATA(hdr) \ | |
257 | (((hdr)[HDR_INDX_TYPE_LEN] & TYPE_LEN_DA_BIT) == TYPE_LEN_DATA) | |
258 | #define HDR_GET_LEN(hdr) \ | |
259 | ((((hdr)[HDR_INDX_TYPE_LEN] & 0x1f) << 6) + (((hdr)[HDR_INDX_LEN1] & 0x3f))) | |
260 | #define HDR_GET_SEQ(hdr) ((unsigned int)(hdr)[HDR_INDX_SEQ] & 0x3f) | |
261 | ||
262 | /* The maximum data length. */ | |
263 | #define DATA_MAXLEN 1023 | |
264 | ||
265 | /* The trailer offset. */ | |
266 | #define TRLR_OFFSET HDR_OFFSET | |
267 | ||
268 | /* The indices of the bytes in the packet trailer. */ | |
269 | #define TRLR_INDX_CSUM1 0 | |
270 | #define TRLR_INDX_CSUM2 1 | |
271 | #define TRLR_INDX_CSUM3 2 | |
272 | #define TRLR_LENGTH 3 | |
273 | ||
274 | /* How to compute the trailer bytes. */ | |
275 | #define TRLR_SET_CSUM1(cksum) (TRLR_OFFSET + (((cksum) >> 12) & 0x3f)) | |
276 | #define TRLR_SET_CSUM2(cksum) (TRLR_OFFSET + (((cksum) >> 6) & 0x3f)) | |
277 | #define TRLR_SET_CSUM3(cksum) (TRLR_OFFSET + (((cksum) ) & 0x3f)) | |
278 | ||
279 | /* Check that a trailer byte is reasonable. */ | |
280 | #define TRLR_CHECK(ch) (((ch) & TRLR_OFFSET) == TRLR_OFFSET) | |
281 | ||
282 | /* Get data from the trailer. This evaluates its argument multiple | |
283 | times. */ | |
284 | #define TRLR_GET_CKSUM(trlr) \ | |
285 | ((((trlr)[TRLR_INDX_CSUM1] & 0x3f) << 12) \ | |
286 | + (((trlr)[TRLR_INDX_CSUM2] & 0x3f) << 6) \ | |
287 | + ((trlr)[TRLR_INDX_CSUM3] & 0x3f)) | |
288 | ||
289 | /* The sequence number modulos. */ | |
290 | #define SEQ_MODULOS (64) | |
291 | ||
292 | /* PMON commands to load from the serial port or UDP socket. */ | |
293 | #define LOAD_CMD "load -b -s tty0\r" | |
294 | #define LOAD_CMD_UDP "load -b -s udp\r" | |
295 | ||
296 | /* The target vectors for the four different remote MIPS targets. | |
297 | These are initialized with code in _initialize_remote_mips instead | |
298 | of static initializers, to make it easier to extend the target_ops | |
299 | vector later. */ | |
300 | struct target_ops mips_ops, pmon_ops, ddb_ops, lsi_ops; | |
301 | ||
c5aa993b JM |
302 | enum mips_monitor_type |
303 | { | |
304 | /* IDT/SIM monitor being used: */ | |
305 | MON_IDT, | |
306 | /* PMON monitor being used: */ | |
307 | MON_PMON, /* 3.0.83 [COGENT,EB,FP,NET] Algorithmics Ltd. Nov 9 1995 17:19:50 */ | |
308 | MON_DDB, /* 2.7.473 [DDBVR4300,EL,FP,NET] Risq Modular Systems, Thu Jun 6 09:28:40 PDT 1996 */ | |
309 | MON_LSI, /* 4.3.12 [EB,FP], LSI LOGIC Corp. Tue Feb 25 13:22:14 1997 */ | |
310 | /* Last and unused value, for sizing vectors, etc. */ | |
311 | MON_LAST | |
312 | }; | |
c906108c SS |
313 | static enum mips_monitor_type mips_monitor = MON_LAST; |
314 | ||
315 | /* The monitor prompt text. If the user sets the PMON prompt | |
316 | to some new value, the GDB `set monitor-prompt' command must also | |
317 | be used to inform GDB about the expected prompt. Otherwise, GDB | |
318 | will not be able to connect to PMON in mips_initialize(). | |
319 | If the `set monitor-prompt' command is not used, the expected | |
320 | default prompt will be set according the target: | |
c5aa993b JM |
321 | target prompt |
322 | ----- ----- | |
323 | pmon PMON> | |
324 | ddb NEC010> | |
325 | lsi PMON> | |
326 | */ | |
c906108c SS |
327 | static char *mips_monitor_prompt; |
328 | ||
329 | /* Set to 1 if the target is open. */ | |
330 | static int mips_is_open; | |
331 | ||
332 | /* Currently active target description (if mips_is_open == 1) */ | |
333 | static struct target_ops *current_ops; | |
334 | ||
335 | /* Set to 1 while the connection is being initialized. */ | |
336 | static int mips_initializing; | |
337 | ||
338 | /* Set to 1 while the connection is being brought down. */ | |
339 | static int mips_exiting; | |
340 | ||
341 | /* The next sequence number to send. */ | |
342 | static unsigned int mips_send_seq; | |
343 | ||
344 | /* The next sequence number we expect to receive. */ | |
345 | static unsigned int mips_receive_seq; | |
346 | ||
347 | /* The time to wait before retransmitting a packet, in seconds. */ | |
348 | static int mips_retransmit_wait = 3; | |
349 | ||
350 | /* The number of times to try retransmitting a packet before giving up. */ | |
351 | static int mips_send_retries = 10; | |
352 | ||
353 | /* The number of garbage characters to accept when looking for an | |
354 | SYN for the next packet. */ | |
59d521c1 | 355 | static int mips_syn_garbage = 10; |
c906108c SS |
356 | |
357 | /* The time to wait for a packet, in seconds. */ | |
358 | static int mips_receive_wait = 5; | |
359 | ||
360 | /* Set if we have sent a packet to the board but have not yet received | |
361 | a reply. */ | |
362 | static int mips_need_reply = 0; | |
363 | ||
364 | /* Handle used to access serial I/O stream. */ | |
819cc324 | 365 | static struct serial *mips_desc; |
c906108c SS |
366 | |
367 | /* UDP handle used to download files to target. */ | |
819cc324 | 368 | static struct serial *udp_desc; |
c906108c SS |
369 | static int udp_in_use; |
370 | ||
371 | /* TFTP filename used to download files to DDB board, in the form | |
372 | host:filename. */ | |
373 | static char *tftp_name; /* host:filename */ | |
374 | static char *tftp_localname; /* filename portion of above */ | |
375 | static int tftp_in_use; | |
376 | static FILE *tftp_file; | |
377 | ||
378 | /* Counts the number of times the user tried to interrupt the target (usually | |
379 | via ^C. */ | |
380 | static int interrupt_count; | |
381 | ||
382 | /* If non-zero, means that the target is running. */ | |
383 | static int mips_wait_flag = 0; | |
384 | ||
385 | /* If non-zero, monitor supports breakpoint commands. */ | |
d4f3574e | 386 | static int monitor_supports_breakpoints = 0; |
c906108c SS |
387 | |
388 | /* Data cache header. */ | |
389 | ||
c5aa993b | 390 | #if 0 /* not used (yet?) */ |
c906108c SS |
391 | static DCACHE *mips_dcache; |
392 | #endif | |
393 | ||
394 | /* Non-zero means that we've just hit a read or write watchpoint */ | |
395 | static int hit_watchpoint; | |
396 | ||
397 | /* Table of breakpoints/watchpoints (used only on LSI PMON target). | |
398 | The table is indexed by a breakpoint number, which is an integer | |
399 | from 0 to 255 returned by the LSI PMON when a breakpoint is set. | |
c5aa993b | 400 | */ |
c906108c SS |
401 | #define MAX_LSI_BREAKPOINTS 256 |
402 | struct lsi_breakpoint_info | |
c5aa993b JM |
403 | { |
404 | enum break_type type; /* type of breakpoint */ | |
405 | CORE_ADDR addr; /* address of breakpoint */ | |
406 | int len; /* length of region being watched */ | |
407 | unsigned long value; /* value to watch */ | |
408 | } | |
409 | lsi_breakpoints[MAX_LSI_BREAKPOINTS]; | |
c906108c SS |
410 | |
411 | /* Error/warning codes returned by LSI PMON for breakpoint commands. | |
412 | Warning values may be ORed together; error values may not. */ | |
c5aa993b JM |
413 | #define W_WARN 0x100 /* This bit is set if the error code is a warning */ |
414 | #define W_MSK 0x101 /* warning: Range feature is supported via mask */ | |
415 | #define W_VAL 0x102 /* warning: Value check is not supported in hardware */ | |
416 | #define W_QAL 0x104 /* warning: Requested qualifiers are not supported in hardware */ | |
417 | ||
418 | #define E_ERR 0x200 /* This bit is set if the error code is an error */ | |
419 | #define E_BPT 0x200 /* error: No such breakpoint number */ | |
420 | #define E_RGE 0x201 /* error: Range is not supported */ | |
421 | #define E_QAL 0x202 /* error: The requested qualifiers can not be used */ | |
422 | #define E_OUT 0x203 /* error: Out of hardware resources */ | |
423 | #define E_NON 0x204 /* error: Hardware breakpoint not supported */ | |
c906108c SS |
424 | |
425 | struct lsi_error | |
c5aa993b JM |
426 | { |
427 | int code; /* error code */ | |
428 | char *string; /* string associated with this code */ | |
429 | }; | |
c906108c SS |
430 | |
431 | struct lsi_error lsi_warning_table[] = | |
432 | { | |
c5aa993b JM |
433 | {W_MSK, "Range feature is supported via mask"}, |
434 | {W_VAL, "Value check is not supported in hardware"}, | |
435 | {W_QAL, "Requested qualifiers are not supported in hardware"}, | |
436 | {0, NULL} | |
c906108c SS |
437 | }; |
438 | ||
439 | struct lsi_error lsi_error_table[] = | |
c5aa993b JM |
440 | { |
441 | {E_BPT, "No such breakpoint number"}, | |
442 | {E_RGE, "Range is not supported"}, | |
443 | {E_QAL, "The requested qualifiers can not be used"}, | |
444 | {E_OUT, "Out of hardware resources"}, | |
445 | {E_NON, "Hardware breakpoint not supported"}, | |
446 | {0, NULL} | |
c906108c SS |
447 | }; |
448 | ||
449 | /* Set to 1 with the 'set monitor-warnings' command to enable printing | |
450 | of warnings returned by PMON when hardware breakpoints are used. */ | |
451 | static int monitor_warnings; | |
452 | ||
453 | ||
454 | static void | |
fba45db2 | 455 | close_ports (void) |
c906108c SS |
456 | { |
457 | mips_is_open = 0; | |
2cd58942 | 458 | serial_close (mips_desc); |
c906108c SS |
459 | |
460 | if (udp_in_use) | |
461 | { | |
2cd58942 | 462 | serial_close (udp_desc); |
c906108c SS |
463 | udp_in_use = 0; |
464 | } | |
465 | tftp_in_use = 0; | |
466 | } | |
c5aa993b | 467 | |
c906108c SS |
468 | /* Handle low-level error that we can't recover from. Note that just |
469 | error()ing out from target_wait or some such low-level place will cause | |
470 | all hell to break loose--the rest of GDB will tend to get left in an | |
471 | inconsistent state. */ | |
472 | ||
473 | static NORETURN void | |
c5aa993b | 474 | mips_error (char *string,...) |
c906108c SS |
475 | { |
476 | va_list args; | |
477 | ||
c906108c | 478 | va_start (args, string); |
c5aa993b | 479 | |
c906108c | 480 | target_terminal_ours (); |
c5aa993b | 481 | wrap_here (""); /* Force out any buffered output */ |
c906108c SS |
482 | gdb_flush (gdb_stdout); |
483 | if (error_pre_print) | |
ab4e3d93 | 484 | fputs_filtered (error_pre_print, gdb_stderr); |
c906108c SS |
485 | vfprintf_filtered (gdb_stderr, string, args); |
486 | fprintf_filtered (gdb_stderr, "\n"); | |
487 | va_end (args); | |
488 | gdb_flush (gdb_stderr); | |
489 | ||
490 | /* Clean up in such a way that mips_close won't try to talk to the | |
491 | board (it almost surely won't work since we weren't able to talk to | |
492 | it). */ | |
493 | close_ports (); | |
494 | ||
495 | printf_unfiltered ("Ending remote MIPS debugging.\n"); | |
496 | target_mourn_inferior (); | |
497 | ||
315a522e | 498 | deprecated_throw_reason (RETURN_ERROR); |
c906108c SS |
499 | } |
500 | ||
501 | /* putc_readable - print a character, displaying non-printable chars in | |
502 | ^x notation or in hex. */ | |
503 | ||
504 | static void | |
fba45db2 | 505 | fputc_readable (int ch, struct ui_file *file) |
c906108c SS |
506 | { |
507 | if (ch == '\n') | |
9846de1b | 508 | fputc_unfiltered ('\n', file); |
c906108c | 509 | else if (ch == '\r') |
9846de1b | 510 | fprintf_unfiltered (file, "\\r"); |
c5aa993b | 511 | else if (ch < 0x20) /* ASCII control character */ |
9846de1b | 512 | fprintf_unfiltered (file, "^%c", ch + '@'); |
c5aa993b | 513 | else if (ch >= 0x7f) /* non-ASCII characters (rubout or greater) */ |
9846de1b | 514 | fprintf_unfiltered (file, "[%02x]", ch & 0xff); |
c906108c | 515 | else |
9846de1b | 516 | fputc_unfiltered (ch, file); |
c906108c SS |
517 | } |
518 | ||
519 | ||
520 | /* puts_readable - print a string, displaying non-printable chars in | |
521 | ^x notation or in hex. */ | |
522 | ||
523 | static void | |
98691afe | 524 | fputs_readable (const char *string, struct ui_file *file) |
c906108c SS |
525 | { |
526 | int c; | |
527 | ||
528 | while ((c = *string++) != '\0') | |
9846de1b | 529 | fputc_readable (c, file); |
c906108c SS |
530 | } |
531 | ||
532 | ||
533 | /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if | |
534 | timed out. TIMEOUT specifies timeout value in seconds. | |
c5aa993b | 535 | */ |
c906108c | 536 | |
a78f21af | 537 | static int |
98691afe | 538 | mips_expect_timeout (const char *string, int timeout) |
c906108c | 539 | { |
98691afe | 540 | const char *p = string; |
c906108c SS |
541 | |
542 | if (remote_debug) | |
543 | { | |
9846de1b JM |
544 | fprintf_unfiltered (gdb_stdlog, "Expected \""); |
545 | fputs_readable (string, gdb_stdlog); | |
546 | fprintf_unfiltered (gdb_stdlog, "\", got \""); | |
c906108c SS |
547 | } |
548 | ||
8edbea78 | 549 | immediate_quit++; |
c906108c SS |
550 | while (1) |
551 | { | |
552 | int c; | |
553 | ||
2cd58942 AC |
554 | /* Must use serial_readchar() here cuz mips_readchar would get |
555 | confused if we were waiting for the mips_monitor_prompt... */ | |
c906108c | 556 | |
2cd58942 | 557 | c = serial_readchar (mips_desc, timeout); |
c906108c SS |
558 | |
559 | if (c == SERIAL_TIMEOUT) | |
560 | { | |
561 | if (remote_debug) | |
9846de1b | 562 | fprintf_unfiltered (gdb_stdlog, "\": FAIL\n"); |
c906108c SS |
563 | return 0; |
564 | } | |
565 | ||
566 | if (remote_debug) | |
9846de1b | 567 | fputc_readable (c, gdb_stdlog); |
c906108c SS |
568 | |
569 | if (c == *p++) | |
c5aa993b | 570 | { |
c906108c SS |
571 | if (*p == '\0') |
572 | { | |
8edbea78 | 573 | immediate_quit--; |
c906108c | 574 | if (remote_debug) |
9846de1b | 575 | fprintf_unfiltered (gdb_stdlog, "\": OK\n"); |
c906108c SS |
576 | return 1; |
577 | } | |
578 | } | |
579 | else | |
580 | { | |
581 | p = string; | |
582 | if (c == *p) | |
583 | p++; | |
584 | } | |
585 | } | |
586 | } | |
587 | ||
588 | /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if | |
589 | timed out. The timeout value is hard-coded to 2 seconds. Use | |
590 | mips_expect_timeout if a different timeout value is needed. | |
c5aa993b | 591 | */ |
c906108c | 592 | |
a78f21af | 593 | static int |
98691afe | 594 | mips_expect (const char *string) |
c906108c | 595 | { |
688991e6 | 596 | return mips_expect_timeout (string, remote_timeout); |
c906108c SS |
597 | } |
598 | ||
c906108c | 599 | /* Read a character from the remote, aborting on error. Returns |
2cd58942 AC |
600 | SERIAL_TIMEOUT on timeout (since that's what serial_readchar() |
601 | returns). FIXME: If we see the string mips_monitor_prompt from the | |
602 | board, then we are debugging on the main console port, and we have | |
603 | somehow dropped out of remote debugging mode. In this case, we | |
604 | automatically go back in to remote debugging mode. This is a hack, | |
605 | put in because I can't find any way for a program running on the | |
606 | remote board to terminate without also ending remote debugging | |
c906108c SS |
607 | mode. I assume users won't have any trouble with this; for one |
608 | thing, the IDT documentation generally assumes that the remote | |
609 | debugging port is not the console port. This is, however, very | |
610 | convenient for DejaGnu when you only have one connected serial | |
611 | port. */ | |
612 | ||
613 | static int | |
fba45db2 | 614 | mips_readchar (int timeout) |
c906108c SS |
615 | { |
616 | int ch; | |
617 | static int state = 0; | |
618 | int mips_monitor_prompt_len = strlen (mips_monitor_prompt); | |
619 | ||
c906108c SS |
620 | { |
621 | int i; | |
622 | ||
623 | i = timeout; | |
624 | if (i == -1 && watchdog > 0) | |
c5aa993b | 625 | i = watchdog; |
c906108c | 626 | } |
c906108c SS |
627 | |
628 | if (state == mips_monitor_prompt_len) | |
629 | timeout = 1; | |
2cd58942 | 630 | ch = serial_readchar (mips_desc, timeout); |
7a292a7a | 631 | |
c5aa993b | 632 | if (ch == SERIAL_TIMEOUT && timeout == -1) /* Watchdog went off */ |
c906108c SS |
633 | { |
634 | target_mourn_inferior (); | |
635 | error ("Watchdog has expired. Target detached.\n"); | |
636 | } | |
7a292a7a | 637 | |
c906108c SS |
638 | if (ch == SERIAL_EOF) |
639 | mips_error ("End of file from remote"); | |
640 | if (ch == SERIAL_ERROR) | |
641 | mips_error ("Error reading from remote: %s", safe_strerror (errno)); | |
642 | if (remote_debug > 1) | |
643 | { | |
644 | /* Don't use _filtered; we can't deal with a QUIT out of | |
c5aa993b | 645 | target_wait, and I think this might be called from there. */ |
c906108c | 646 | if (ch != SERIAL_TIMEOUT) |
9846de1b | 647 | fprintf_unfiltered (gdb_stdlog, "Read '%c' %d 0x%x\n", ch, ch, ch); |
c906108c | 648 | else |
9846de1b | 649 | fprintf_unfiltered (gdb_stdlog, "Timed out in read\n"); |
c906108c SS |
650 | } |
651 | ||
652 | /* If we have seen mips_monitor_prompt and we either time out, or | |
653 | we see a @ (which was echoed from a packet we sent), reset the | |
654 | board as described above. The first character in a packet after | |
655 | the SYN (which is not echoed) is always an @ unless the packet is | |
656 | more than 64 characters long, which ours never are. */ | |
657 | if ((ch == SERIAL_TIMEOUT || ch == '@') | |
658 | && state == mips_monitor_prompt_len | |
c5aa993b JM |
659 | && !mips_initializing |
660 | && !mips_exiting) | |
c906108c SS |
661 | { |
662 | if (remote_debug > 0) | |
663 | /* Don't use _filtered; we can't deal with a QUIT out of | |
664 | target_wait, and I think this might be called from there. */ | |
9846de1b | 665 | fprintf_unfiltered (gdb_stdlog, "Reinitializing MIPS debugging mode\n"); |
c906108c SS |
666 | |
667 | mips_need_reply = 0; | |
668 | mips_initialize (); | |
669 | ||
670 | state = 0; | |
671 | ||
672 | /* At this point, about the only thing we can do is abort the command | |
c5aa993b | 673 | in progress and get back to command level as quickly as possible. */ |
c906108c SS |
674 | |
675 | error ("Remote board reset, debug protocol re-initialized."); | |
676 | } | |
677 | ||
678 | if (ch == mips_monitor_prompt[state]) | |
679 | ++state; | |
680 | else | |
681 | state = 0; | |
682 | ||
683 | return ch; | |
684 | } | |
685 | ||
686 | /* Get a packet header, putting the data in the supplied buffer. | |
687 | PGARBAGE is a pointer to the number of garbage characters received | |
688 | so far. CH is the last character received. Returns 0 for success, | |
689 | or -1 for timeout. */ | |
690 | ||
691 | static int | |
fba45db2 | 692 | mips_receive_header (unsigned char *hdr, int *pgarbage, int ch, int timeout) |
c906108c SS |
693 | { |
694 | int i; | |
695 | ||
696 | while (1) | |
697 | { | |
698 | /* Wait for a SYN. mips_syn_garbage is intended to prevent | |
c5aa993b JM |
699 | sitting here indefinitely if the board sends us one garbage |
700 | character per second. ch may already have a value from the | |
701 | last time through the loop. */ | |
c906108c SS |
702 | while (ch != SYN) |
703 | { | |
704 | ch = mips_readchar (timeout); | |
705 | if (ch == SERIAL_TIMEOUT) | |
c5aa993b | 706 | return -1; |
c906108c SS |
707 | if (ch != SYN) |
708 | { | |
709 | /* Printing the character here lets the user of gdb see | |
c5aa993b | 710 | what the program is outputting, if the debugging is |
59d521c1 AC |
711 | being done on the console port. Don't use _filtered: |
712 | we can't deal with a QUIT out of target_wait and | |
713 | buffered target output confuses the user. */ | |
714 | if (!mips_initializing || remote_debug > 0) | |
715 | { | |
716 | if (isprint (ch) || isspace (ch)) | |
717 | { | |
718 | fputc_unfiltered (ch, gdb_stdtarg); | |
719 | } | |
720 | else | |
721 | { | |
722 | fputc_readable (ch, gdb_stdtarg); | |
723 | } | |
724 | gdb_flush (gdb_stdtarg); | |
725 | } | |
726 | ||
727 | /* Only count unprintable characters. */ | |
728 | if (! (isprint (ch) || isspace (ch))) | |
729 | (*pgarbage) += 1; | |
730 | ||
c906108c SS |
731 | if (mips_syn_garbage > 0 |
732 | && *pgarbage > mips_syn_garbage) | |
c5aa993b | 733 | mips_error ("Debug protocol failure: more than %d characters before a sync.", |
c906108c SS |
734 | mips_syn_garbage); |
735 | } | |
736 | } | |
737 | ||
738 | /* Get the packet header following the SYN. */ | |
739 | for (i = 1; i < HDR_LENGTH; i++) | |
740 | { | |
741 | ch = mips_readchar (timeout); | |
742 | if (ch == SERIAL_TIMEOUT) | |
c5aa993b | 743 | return -1; |
c906108c | 744 | /* Make sure this is a header byte. */ |
c5aa993b | 745 | if (ch == SYN || !HDR_CHECK (ch)) |
c906108c SS |
746 | break; |
747 | ||
748 | hdr[i] = ch; | |
749 | } | |
750 | ||
751 | /* If we got the complete header, we can return. Otherwise we | |
c5aa993b | 752 | loop around and keep looking for SYN. */ |
c906108c | 753 | if (i >= HDR_LENGTH) |
c5aa993b | 754 | return 0; |
c906108c SS |
755 | } |
756 | } | |
757 | ||
758 | /* Get a packet header, putting the data in the supplied buffer. | |
759 | PGARBAGE is a pointer to the number of garbage characters received | |
760 | so far. The last character read is returned in *PCH. Returns 0 | |
761 | for success, -1 for timeout, -2 for error. */ | |
762 | ||
763 | static int | |
fba45db2 | 764 | mips_receive_trailer (unsigned char *trlr, int *pgarbage, int *pch, int timeout) |
c906108c SS |
765 | { |
766 | int i; | |
767 | int ch; | |
768 | ||
769 | for (i = 0; i < TRLR_LENGTH; i++) | |
770 | { | |
771 | ch = mips_readchar (timeout); | |
772 | *pch = ch; | |
773 | if (ch == SERIAL_TIMEOUT) | |
774 | return -1; | |
c5aa993b | 775 | if (!TRLR_CHECK (ch)) |
c906108c SS |
776 | return -2; |
777 | trlr[i] = ch; | |
778 | } | |
779 | return 0; | |
780 | } | |
781 | ||
782 | /* Get the checksum of a packet. HDR points to the packet header. | |
783 | DATA points to the packet data. LEN is the length of DATA. */ | |
784 | ||
785 | static int | |
fba45db2 | 786 | mips_cksum (const unsigned char *hdr, const unsigned char *data, int len) |
c906108c | 787 | { |
52f0bd74 AC |
788 | const unsigned char *p; |
789 | int c; | |
790 | int cksum; | |
c906108c SS |
791 | |
792 | cksum = 0; | |
793 | ||
794 | /* The initial SYN is not included in the checksum. */ | |
795 | c = HDR_LENGTH - 1; | |
796 | p = hdr + 1; | |
797 | while (c-- != 0) | |
798 | cksum += *p++; | |
c5aa993b | 799 | |
c906108c SS |
800 | c = len; |
801 | p = data; | |
802 | while (c-- != 0) | |
803 | cksum += *p++; | |
804 | ||
805 | return cksum; | |
806 | } | |
807 | ||
808 | /* Send a packet containing the given ASCII string. */ | |
809 | ||
810 | static void | |
fba45db2 | 811 | mips_send_packet (const char *s, int get_ack) |
c906108c SS |
812 | { |
813 | /* unsigned */ int len; | |
814 | unsigned char *packet; | |
52f0bd74 | 815 | int cksum; |
c906108c SS |
816 | int try; |
817 | ||
818 | len = strlen (s); | |
819 | if (len > DATA_MAXLEN) | |
820 | mips_error ("MIPS protocol data packet too long: %s", s); | |
821 | ||
822 | packet = (unsigned char *) alloca (HDR_LENGTH + len + TRLR_LENGTH + 1); | |
823 | ||
824 | packet[HDR_INDX_SYN] = HDR_SET_SYN (1, len, mips_send_seq); | |
825 | packet[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (1, len, mips_send_seq); | |
826 | packet[HDR_INDX_LEN1] = HDR_SET_LEN1 (1, len, mips_send_seq); | |
827 | packet[HDR_INDX_SEQ] = HDR_SET_SEQ (1, len, mips_send_seq); | |
828 | ||
829 | memcpy (packet + HDR_LENGTH, s, len); | |
830 | ||
831 | cksum = mips_cksum (packet, packet + HDR_LENGTH, len); | |
832 | packet[HDR_LENGTH + len + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum); | |
833 | packet[HDR_LENGTH + len + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum); | |
834 | packet[HDR_LENGTH + len + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum); | |
835 | ||
836 | /* Increment the sequence number. This will set mips_send_seq to | |
837 | the sequence number we expect in the acknowledgement. */ | |
838 | mips_send_seq = (mips_send_seq + 1) % SEQ_MODULOS; | |
839 | ||
840 | /* We can only have one outstanding data packet, so we just wait for | |
841 | the acknowledgement here. Keep retransmitting the packet until | |
842 | we get one, or until we've tried too many times. */ | |
843 | for (try = 0; try < mips_send_retries; try++) | |
844 | { | |
845 | int garbage; | |
846 | int ch; | |
847 | ||
848 | if (remote_debug > 0) | |
849 | { | |
850 | /* Don't use _filtered; we can't deal with a QUIT out of | |
851 | target_wait, and I think this might be called from there. */ | |
852 | packet[HDR_LENGTH + len + TRLR_LENGTH] = '\0'; | |
9846de1b | 853 | fprintf_unfiltered (gdb_stdlog, "Writing \"%s\"\n", packet + 1); |
c906108c SS |
854 | } |
855 | ||
2cd58942 | 856 | if (serial_write (mips_desc, packet, |
c906108c SS |
857 | HDR_LENGTH + len + TRLR_LENGTH) != 0) |
858 | mips_error ("write to target failed: %s", safe_strerror (errno)); | |
859 | ||
c5aa993b | 860 | if (!get_ack) |
c906108c SS |
861 | return; |
862 | ||
863 | garbage = 0; | |
864 | ch = 0; | |
865 | while (1) | |
866 | { | |
867 | unsigned char hdr[HDR_LENGTH + 1]; | |
868 | unsigned char trlr[TRLR_LENGTH + 1]; | |
869 | int err; | |
870 | unsigned int seq; | |
871 | ||
872 | /* Get the packet header. If we time out, resend the data | |
873 | packet. */ | |
874 | err = mips_receive_header (hdr, &garbage, ch, mips_retransmit_wait); | |
875 | if (err != 0) | |
876 | break; | |
877 | ||
878 | ch = 0; | |
879 | ||
880 | /* If we get a data packet, assume it is a duplicate and | |
881 | ignore it. FIXME: If the acknowledgement is lost, this | |
882 | data packet may be the packet the remote sends after the | |
883 | acknowledgement. */ | |
c5aa993b JM |
884 | if (HDR_IS_DATA (hdr)) |
885 | { | |
886 | int i; | |
887 | ||
888 | /* Ignore any errors raised whilst attempting to ignore | |
889 | packet. */ | |
890 | ||
891 | len = HDR_GET_LEN (hdr); | |
892 | ||
893 | for (i = 0; i < len; i++) | |
894 | { | |
895 | int rch; | |
896 | ||
688991e6 | 897 | rch = mips_readchar (remote_timeout); |
c5aa993b JM |
898 | if (rch == SYN) |
899 | { | |
900 | ch = SYN; | |
901 | break; | |
902 | } | |
903 | if (rch == SERIAL_TIMEOUT) | |
904 | break; | |
905 | /* ignore the character */ | |
906 | } | |
907 | ||
908 | if (i == len) | |
688991e6 AC |
909 | (void) mips_receive_trailer (trlr, &garbage, &ch, |
910 | remote_timeout); | |
c5aa993b JM |
911 | |
912 | /* We don't bother checking the checksum, or providing an | |
913 | ACK to the packet. */ | |
914 | continue; | |
915 | } | |
c906108c SS |
916 | |
917 | /* If the length is not 0, this is a garbled packet. */ | |
918 | if (HDR_GET_LEN (hdr) != 0) | |
919 | continue; | |
920 | ||
921 | /* Get the packet trailer. */ | |
922 | err = mips_receive_trailer (trlr, &garbage, &ch, | |
923 | mips_retransmit_wait); | |
924 | ||
925 | /* If we timed out, resend the data packet. */ | |
926 | if (err == -1) | |
927 | break; | |
928 | ||
929 | /* If we got a bad character, reread the header. */ | |
930 | if (err != 0) | |
931 | continue; | |
932 | ||
933 | /* If the checksum does not match the trailer checksum, this | |
934 | is a bad packet; ignore it. */ | |
935 | if (mips_cksum (hdr, (unsigned char *) NULL, 0) | |
936 | != TRLR_GET_CKSUM (trlr)) | |
937 | continue; | |
938 | ||
939 | if (remote_debug > 0) | |
940 | { | |
941 | hdr[HDR_LENGTH] = '\0'; | |
942 | trlr[TRLR_LENGTH] = '\0'; | |
943 | /* Don't use _filtered; we can't deal with a QUIT out of | |
c5aa993b | 944 | target_wait, and I think this might be called from there. */ |
9846de1b JM |
945 | fprintf_unfiltered (gdb_stdlog, "Got ack %d \"%s%s\"\n", |
946 | HDR_GET_SEQ (hdr), hdr + 1, trlr); | |
c906108c SS |
947 | } |
948 | ||
949 | /* If this ack is for the current packet, we're done. */ | |
950 | seq = HDR_GET_SEQ (hdr); | |
951 | if (seq == mips_send_seq) | |
952 | return; | |
953 | ||
954 | /* If this ack is for the last packet, resend the current | |
955 | packet. */ | |
956 | if ((seq + 1) % SEQ_MODULOS == mips_send_seq) | |
957 | break; | |
958 | ||
959 | /* Otherwise this is a bad ack; ignore it. Increment the | |
960 | garbage count to ensure that we do not stay in this loop | |
961 | forever. */ | |
962 | ++garbage; | |
963 | } | |
964 | } | |
965 | ||
966 | mips_error ("Remote did not acknowledge packet"); | |
967 | } | |
968 | ||
969 | /* Receive and acknowledge a packet, returning the data in BUFF (which | |
970 | should be DATA_MAXLEN + 1 bytes). The protocol documentation | |
971 | implies that only the sender retransmits packets, so this code just | |
972 | waits silently for a packet. It returns the length of the received | |
973 | packet. If THROW_ERROR is nonzero, call error() on errors. If not, | |
974 | don't print an error message and return -1. */ | |
975 | ||
976 | static int | |
fba45db2 | 977 | mips_receive_packet (char *buff, int throw_error, int timeout) |
c906108c SS |
978 | { |
979 | int ch; | |
980 | int garbage; | |
981 | int len; | |
982 | unsigned char ack[HDR_LENGTH + TRLR_LENGTH + 1]; | |
983 | int cksum; | |
984 | ||
985 | ch = 0; | |
986 | garbage = 0; | |
987 | while (1) | |
988 | { | |
989 | unsigned char hdr[HDR_LENGTH]; | |
990 | unsigned char trlr[TRLR_LENGTH]; | |
991 | int i; | |
992 | int err; | |
993 | ||
994 | if (mips_receive_header (hdr, &garbage, ch, timeout) != 0) | |
995 | { | |
996 | if (throw_error) | |
997 | mips_error ("Timed out waiting for remote packet"); | |
998 | else | |
999 | return -1; | |
1000 | } | |
1001 | ||
1002 | ch = 0; | |
1003 | ||
1004 | /* An acknowledgement is probably a duplicate; ignore it. */ | |
c5aa993b | 1005 | if (!HDR_IS_DATA (hdr)) |
c906108c | 1006 | { |
c5aa993b JM |
1007 | len = HDR_GET_LEN (hdr); |
1008 | /* Check if the length is valid for an ACK, we may aswell | |
1009 | try and read the remainder of the packet: */ | |
1010 | if (len == 0) | |
1011 | { | |
1012 | /* Ignore the error condition, since we are going to | |
1013 | ignore the packet anyway. */ | |
1014 | (void) mips_receive_trailer (trlr, &garbage, &ch, timeout); | |
1015 | } | |
c906108c SS |
1016 | /* Don't use _filtered; we can't deal with a QUIT out of |
1017 | target_wait, and I think this might be called from there. */ | |
1018 | if (remote_debug > 0) | |
9846de1b | 1019 | fprintf_unfiltered (gdb_stdlog, "Ignoring unexpected ACK\n"); |
c906108c SS |
1020 | continue; |
1021 | } | |
1022 | ||
1023 | len = HDR_GET_LEN (hdr); | |
1024 | for (i = 0; i < len; i++) | |
1025 | { | |
1026 | int rch; | |
1027 | ||
1028 | rch = mips_readchar (timeout); | |
1029 | if (rch == SYN) | |
1030 | { | |
1031 | ch = SYN; | |
1032 | break; | |
1033 | } | |
1034 | if (rch == SERIAL_TIMEOUT) | |
1035 | { | |
1036 | if (throw_error) | |
1037 | mips_error ("Timed out waiting for remote packet"); | |
1038 | else | |
1039 | return -1; | |
1040 | } | |
1041 | buff[i] = rch; | |
1042 | } | |
1043 | ||
1044 | if (i < len) | |
1045 | { | |
1046 | /* Don't use _filtered; we can't deal with a QUIT out of | |
1047 | target_wait, and I think this might be called from there. */ | |
1048 | if (remote_debug > 0) | |
9846de1b JM |
1049 | fprintf_unfiltered (gdb_stdlog, |
1050 | "Got new SYN after %d chars (wanted %d)\n", | |
1051 | i, len); | |
c906108c SS |
1052 | continue; |
1053 | } | |
1054 | ||
1055 | err = mips_receive_trailer (trlr, &garbage, &ch, timeout); | |
1056 | if (err == -1) | |
1057 | { | |
1058 | if (throw_error) | |
1059 | mips_error ("Timed out waiting for packet"); | |
1060 | else | |
1061 | return -1; | |
1062 | } | |
1063 | if (err == -2) | |
1064 | { | |
1065 | /* Don't use _filtered; we can't deal with a QUIT out of | |
1066 | target_wait, and I think this might be called from there. */ | |
1067 | if (remote_debug > 0) | |
9846de1b | 1068 | fprintf_unfiltered (gdb_stdlog, "Got SYN when wanted trailer\n"); |
c906108c SS |
1069 | continue; |
1070 | } | |
1071 | ||
1072 | /* If this is the wrong sequence number, ignore it. */ | |
1073 | if (HDR_GET_SEQ (hdr) != mips_receive_seq) | |
1074 | { | |
1075 | /* Don't use _filtered; we can't deal with a QUIT out of | |
1076 | target_wait, and I think this might be called from there. */ | |
1077 | if (remote_debug > 0) | |
9846de1b | 1078 | fprintf_unfiltered (gdb_stdlog, |
c5aa993b JM |
1079 | "Ignoring sequence number %d (want %d)\n", |
1080 | HDR_GET_SEQ (hdr), mips_receive_seq); | |
c906108c SS |
1081 | continue; |
1082 | } | |
1083 | ||
1084 | if (mips_cksum (hdr, buff, len) == TRLR_GET_CKSUM (trlr)) | |
c5aa993b | 1085 | break; |
c906108c SS |
1086 | |
1087 | if (remote_debug > 0) | |
1088 | /* Don't use _filtered; we can't deal with a QUIT out of | |
1089 | target_wait, and I think this might be called from there. */ | |
1090 | printf_unfiltered ("Bad checksum; data %d, trailer %d\n", | |
c5aa993b JM |
1091 | mips_cksum (hdr, buff, len), |
1092 | TRLR_GET_CKSUM (trlr)); | |
c906108c SS |
1093 | |
1094 | /* The checksum failed. Send an acknowledgement for the | |
c5aa993b | 1095 | previous packet to tell the remote to resend the packet. */ |
c906108c SS |
1096 | ack[HDR_INDX_SYN] = HDR_SET_SYN (0, 0, mips_receive_seq); |
1097 | ack[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq); | |
1098 | ack[HDR_INDX_LEN1] = HDR_SET_LEN1 (0, 0, mips_receive_seq); | |
1099 | ack[HDR_INDX_SEQ] = HDR_SET_SEQ (0, 0, mips_receive_seq); | |
1100 | ||
1101 | cksum = mips_cksum (ack, (unsigned char *) NULL, 0); | |
1102 | ||
1103 | ack[HDR_LENGTH + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum); | |
1104 | ack[HDR_LENGTH + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum); | |
1105 | ack[HDR_LENGTH + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum); | |
1106 | ||
1107 | if (remote_debug > 0) | |
1108 | { | |
1109 | ack[HDR_LENGTH + TRLR_LENGTH] = '\0'; | |
1110 | /* Don't use _filtered; we can't deal with a QUIT out of | |
1111 | target_wait, and I think this might be called from there. */ | |
1112 | printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq, | |
c5aa993b | 1113 | ack + 1); |
c906108c SS |
1114 | } |
1115 | ||
2cd58942 | 1116 | if (serial_write (mips_desc, ack, HDR_LENGTH + TRLR_LENGTH) != 0) |
c906108c SS |
1117 | { |
1118 | if (throw_error) | |
1119 | mips_error ("write to target failed: %s", safe_strerror (errno)); | |
1120 | else | |
1121 | return -1; | |
1122 | } | |
1123 | } | |
1124 | ||
1125 | if (remote_debug > 0) | |
1126 | { | |
1127 | buff[len] = '\0'; | |
1128 | /* Don't use _filtered; we can't deal with a QUIT out of | |
c5aa993b | 1129 | target_wait, and I think this might be called from there. */ |
c906108c SS |
1130 | printf_unfiltered ("Got packet \"%s\"\n", buff); |
1131 | } | |
1132 | ||
1133 | /* We got the packet. Send an acknowledgement. */ | |
1134 | mips_receive_seq = (mips_receive_seq + 1) % SEQ_MODULOS; | |
1135 | ||
1136 | ack[HDR_INDX_SYN] = HDR_SET_SYN (0, 0, mips_receive_seq); | |
1137 | ack[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq); | |
1138 | ack[HDR_INDX_LEN1] = HDR_SET_LEN1 (0, 0, mips_receive_seq); | |
1139 | ack[HDR_INDX_SEQ] = HDR_SET_SEQ (0, 0, mips_receive_seq); | |
1140 | ||
1141 | cksum = mips_cksum (ack, (unsigned char *) NULL, 0); | |
1142 | ||
1143 | ack[HDR_LENGTH + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum); | |
1144 | ack[HDR_LENGTH + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum); | |
1145 | ack[HDR_LENGTH + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum); | |
1146 | ||
1147 | if (remote_debug > 0) | |
1148 | { | |
1149 | ack[HDR_LENGTH + TRLR_LENGTH] = '\0'; | |
1150 | /* Don't use _filtered; we can't deal with a QUIT out of | |
c5aa993b | 1151 | target_wait, and I think this might be called from there. */ |
c906108c | 1152 | printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq, |
c5aa993b | 1153 | ack + 1); |
c906108c SS |
1154 | } |
1155 | ||
2cd58942 | 1156 | if (serial_write (mips_desc, ack, HDR_LENGTH + TRLR_LENGTH) != 0) |
c906108c SS |
1157 | { |
1158 | if (throw_error) | |
1159 | mips_error ("write to target failed: %s", safe_strerror (errno)); | |
1160 | else | |
1161 | return -1; | |
1162 | } | |
1163 | ||
1164 | return len; | |
1165 | } | |
1166 | \f | |
1167 | /* Optionally send a request to the remote system and optionally wait | |
1168 | for the reply. This implements the remote debugging protocol, | |
1169 | which is built on top of the packet protocol defined above. Each | |
1170 | request has an ADDR argument and a DATA argument. The following | |
1171 | requests are defined: | |
1172 | ||
c5aa993b JM |
1173 | \0 don't send a request; just wait for a reply |
1174 | i read word from instruction space at ADDR | |
1175 | d read word from data space at ADDR | |
1176 | I write DATA to instruction space at ADDR | |
1177 | D write DATA to data space at ADDR | |
1178 | r read register number ADDR | |
1179 | R set register number ADDR to value DATA | |
1180 | c continue execution (if ADDR != 1, set pc to ADDR) | |
1181 | s single step (if ADDR != 1, set pc to ADDR) | |
c906108c SS |
1182 | |
1183 | The read requests return the value requested. The write requests | |
1184 | return the previous value in the changed location. The execution | |
1185 | requests return a UNIX wait value (the approximate signal which | |
1186 | caused execution to stop is in the upper eight bits). | |
1187 | ||
1188 | If PERR is not NULL, this function waits for a reply. If an error | |
1189 | occurs, it sets *PERR to 1 and sets errno according to what the | |
1190 | target board reports. */ | |
1191 | ||
4014092b AC |
1192 | static ULONGEST |
1193 | mips_request (int cmd, | |
1194 | ULONGEST addr, | |
1195 | ULONGEST data, | |
1196 | int *perr, | |
1197 | int timeout, | |
1198 | char *buff) | |
c906108c SS |
1199 | { |
1200 | char myBuff[DATA_MAXLEN + 1]; | |
1201 | int len; | |
1202 | int rpid; | |
1203 | char rcmd; | |
1204 | int rerrflg; | |
1205 | unsigned long rresponse; | |
1206 | ||
1207 | if (buff == (char *) NULL) | |
1208 | buff = myBuff; | |
1209 | ||
1210 | if (cmd != '\0') | |
1211 | { | |
1212 | if (mips_need_reply) | |
8e65ff28 | 1213 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 1214 | _("mips_request: Trying to send command before reply")); |
c906108c SS |
1215 | sprintf (buff, "0x0 %c 0x%s 0x%s", cmd, paddr_nz (addr), paddr_nz (data)); |
1216 | mips_send_packet (buff, 1); | |
1217 | mips_need_reply = 1; | |
1218 | } | |
1219 | ||
1220 | if (perr == (int *) NULL) | |
1221 | return 0; | |
1222 | ||
c5aa993b | 1223 | if (!mips_need_reply) |
8e65ff28 | 1224 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 1225 | _("mips_request: Trying to get reply before command")); |
c906108c SS |
1226 | |
1227 | mips_need_reply = 0; | |
1228 | ||
1229 | len = mips_receive_packet (buff, 1, timeout); | |
1230 | buff[len] = '\0'; | |
1231 | ||
1232 | if (sscanf (buff, "0x%x %c 0x%x 0x%lx", | |
1233 | &rpid, &rcmd, &rerrflg, &rresponse) != 4 | |
1234 | || (cmd != '\0' && rcmd != cmd)) | |
1235 | mips_error ("Bad response from remote board"); | |
1236 | ||
1237 | if (rerrflg != 0) | |
1238 | { | |
1239 | *perr = 1; | |
1240 | ||
1241 | /* FIXME: This will returns MIPS errno numbers, which may or may | |
c5aa993b JM |
1242 | not be the same as errno values used on other systems. If |
1243 | they stick to common errno values, they will be the same, but | |
1244 | if they don't, they must be translated. */ | |
c906108c SS |
1245 | errno = rresponse; |
1246 | ||
1247 | return 0; | |
1248 | } | |
1249 | ||
1250 | *perr = 0; | |
1251 | return rresponse; | |
1252 | } | |
1253 | ||
1254 | static void | |
4efb68b1 | 1255 | mips_initialize_cleanups (void *arg) |
c906108c SS |
1256 | { |
1257 | mips_initializing = 0; | |
1258 | } | |
1259 | ||
1260 | static void | |
4efb68b1 | 1261 | mips_exit_cleanups (void *arg) |
c906108c SS |
1262 | { |
1263 | mips_exiting = 0; | |
1264 | } | |
1265 | ||
1266 | static void | |
fba45db2 | 1267 | mips_send_command (const char *cmd, int prompt) |
c906108c | 1268 | { |
2cd58942 | 1269 | serial_write (mips_desc, cmd, strlen (cmd)); |
c906108c SS |
1270 | mips_expect (cmd); |
1271 | mips_expect ("\n"); | |
1272 | if (prompt) | |
1273 | mips_expect (mips_monitor_prompt); | |
1274 | } | |
1275 | ||
1276 | /* Enter remote (dbx) debug mode: */ | |
1277 | static void | |
fba45db2 | 1278 | mips_enter_debug (void) |
c906108c SS |
1279 | { |
1280 | /* Reset the sequence numbers, ready for the new debug sequence: */ | |
1281 | mips_send_seq = 0; | |
1282 | mips_receive_seq = 0; | |
1283 | ||
1284 | if (mips_monitor != MON_IDT) | |
1285 | mips_send_command ("debug\r", 0); | |
c5aa993b | 1286 | else /* assume IDT monitor by default */ |
c906108c SS |
1287 | mips_send_command ("db tty0\r", 0); |
1288 | ||
c5aa993b | 1289 | sleep (1); |
2cd58942 | 1290 | serial_write (mips_desc, "\r", sizeof "\r" - 1); |
c906108c SS |
1291 | |
1292 | /* We don't need to absorb any spurious characters here, since the | |
1293 | mips_receive_header will eat up a reasonable number of characters | |
1294 | whilst looking for the SYN, however this avoids the "garbage" | |
1295 | being displayed to the user. */ | |
1296 | if (mips_monitor != MON_IDT) | |
1297 | mips_expect ("\r"); | |
c5aa993b | 1298 | |
c906108c SS |
1299 | { |
1300 | char buff[DATA_MAXLEN + 1]; | |
1301 | if (mips_receive_packet (buff, 1, 3) < 0) | |
1302 | mips_error ("Failed to initialize (didn't receive packet)."); | |
1303 | } | |
1304 | } | |
1305 | ||
1306 | /* Exit remote (dbx) debug mode, returning to the monitor prompt: */ | |
1307 | static int | |
fba45db2 | 1308 | mips_exit_debug (void) |
c906108c SS |
1309 | { |
1310 | int err; | |
1311 | struct cleanup *old_cleanups = make_cleanup (mips_exit_cleanups, NULL); | |
1312 | ||
1313 | mips_exiting = 1; | |
1314 | ||
1315 | if (mips_monitor != MON_IDT) | |
1316 | { | |
1317 | /* The DDB (NEC) and MiniRISC (LSI) versions of PMON exit immediately, | |
1318 | so we do not get a reply to this command: */ | |
4014092b | 1319 | mips_request ('x', 0, 0, NULL, mips_receive_wait, NULL); |
c906108c SS |
1320 | mips_need_reply = 0; |
1321 | if (!mips_expect (" break!")) | |
c5aa993b | 1322 | return -1; |
c906108c SS |
1323 | } |
1324 | else | |
4014092b | 1325 | mips_request ('x', 0, 0, &err, mips_receive_wait, NULL); |
c906108c SS |
1326 | |
1327 | if (!mips_expect (mips_monitor_prompt)) | |
1328 | return -1; | |
1329 | ||
1330 | do_cleanups (old_cleanups); | |
1331 | ||
1332 | return 0; | |
1333 | } | |
1334 | ||
1335 | /* Initialize a new connection to the MIPS board, and make sure we are | |
1336 | really connected. */ | |
1337 | ||
1338 | static void | |
fba45db2 | 1339 | mips_initialize (void) |
c906108c SS |
1340 | { |
1341 | int err; | |
1342 | struct cleanup *old_cleanups = make_cleanup (mips_initialize_cleanups, NULL); | |
1343 | int j; | |
1344 | ||
1345 | /* What is this code doing here? I don't see any way it can happen, and | |
1346 | it might mean mips_initializing didn't get cleared properly. | |
1347 | So I'll make it a warning. */ | |
1348 | ||
1349 | if (mips_initializing) | |
1350 | { | |
1351 | warning ("internal error: mips_initialize called twice"); | |
1352 | return; | |
1353 | } | |
1354 | ||
1355 | mips_wait_flag = 0; | |
1356 | mips_initializing = 1; | |
1357 | ||
1358 | /* At this point, the packit protocol isn't responding. We'll try getting | |
1359 | into the monitor, and restarting the protocol. */ | |
1360 | ||
1361 | /* Force the system into the monitor. After this we *should* be at | |
1362 | the mips_monitor_prompt. */ | |
1363 | if (mips_monitor != MON_IDT) | |
c5aa993b | 1364 | j = 0; /* start by checking if we are already at the prompt */ |
c906108c | 1365 | else |
c5aa993b | 1366 | j = 1; /* start by sending a break */ |
c906108c SS |
1367 | for (; j <= 4; j++) |
1368 | { | |
1369 | switch (j) | |
1370 | { | |
c5aa993b | 1371 | case 0: /* First, try sending a CR */ |
2cd58942 AC |
1372 | serial_flush_input (mips_desc); |
1373 | serial_write (mips_desc, "\r", 1); | |
c5aa993b JM |
1374 | break; |
1375 | case 1: /* First, try sending a break */ | |
2cd58942 | 1376 | serial_send_break (mips_desc); |
c906108c | 1377 | break; |
c5aa993b | 1378 | case 2: /* Then, try a ^C */ |
2cd58942 | 1379 | serial_write (mips_desc, "\003", 1); |
c906108c | 1380 | break; |
c5aa993b | 1381 | case 3: /* Then, try escaping from download */ |
c906108c | 1382 | { |
c5aa993b JM |
1383 | if (mips_monitor != MON_IDT) |
1384 | { | |
1385 | char tbuff[7]; | |
1386 | ||
1387 | /* We shouldn't need to send multiple termination | |
1388 | sequences, since the target performs line (or | |
1389 | block) reads, and then processes those | |
1390 | packets. In-case we were downloading a large packet | |
1391 | we flush the output buffer before inserting a | |
1392 | termination sequence. */ | |
2cd58942 | 1393 | serial_flush_output (mips_desc); |
c5aa993b | 1394 | sprintf (tbuff, "\r/E/E\r"); |
2cd58942 | 1395 | serial_write (mips_desc, tbuff, 6); |
c5aa993b JM |
1396 | } |
1397 | else | |
1398 | { | |
1399 | char srec[10]; | |
1400 | int i; | |
1401 | ||
1402 | /* We are possibly in binary download mode, having | |
1403 | aborted in the middle of an S-record. ^C won't | |
1404 | work because of binary mode. The only reliable way | |
1405 | out is to send enough termination packets (8 bytes) | |
1406 | to fill up and then overflow the largest size | |
1407 | S-record (255 bytes in this case). This amounts to | |
1408 | 256/8 + 1 packets. | |
1409 | */ | |
1410 | ||
1411 | mips_make_srec (srec, '7', 0, NULL, 0); | |
1412 | ||
1413 | for (i = 1; i <= 33; i++) | |
1414 | { | |
2cd58942 | 1415 | serial_write (mips_desc, srec, 8); |
c5aa993b | 1416 | |
2cd58942 | 1417 | if (serial_readchar (mips_desc, 0) >= 0) |
c5aa993b | 1418 | break; /* Break immediatly if we get something from |
c906108c | 1419 | the board. */ |
c5aa993b JM |
1420 | } |
1421 | } | |
1422 | } | |
c906108c SS |
1423 | break; |
1424 | case 4: | |
1425 | mips_error ("Failed to initialize."); | |
1426 | } | |
1427 | ||
1428 | if (mips_expect (mips_monitor_prompt)) | |
1429 | break; | |
1430 | } | |
1431 | ||
1432 | if (mips_monitor != MON_IDT) | |
1433 | { | |
1434 | /* Sometimes PMON ignores the first few characters in the first | |
1435 | command sent after a load. Sending a blank command gets | |
c5aa993b | 1436 | around that. */ |
c906108c SS |
1437 | mips_send_command ("\r", -1); |
1438 | ||
1439 | /* Ensure the correct target state: */ | |
1440 | if (mips_monitor != MON_LSI) | |
1441 | mips_send_command ("set regsize 64\r", -1); | |
1442 | mips_send_command ("set hostport tty0\r", -1); | |
1443 | mips_send_command ("set brkcmd \"\"\r", -1); | |
1444 | /* Delete all the current breakpoints: */ | |
1445 | mips_send_command ("db *\r", -1); | |
1446 | /* NOTE: PMON does not have breakpoint support through the | |
1447 | "debug" mode, only at the monitor command-line. */ | |
1448 | } | |
1449 | ||
1450 | mips_enter_debug (); | |
1451 | ||
1452 | /* Clear all breakpoints: */ | |
1453 | if ((mips_monitor == MON_IDT | |
06b1d59c | 1454 | && mips_clear_breakpoint (-1, 0, BREAK_UNUSED) == 0) |
c906108c SS |
1455 | || mips_monitor == MON_LSI) |
1456 | monitor_supports_breakpoints = 1; | |
1457 | else | |
1458 | monitor_supports_breakpoints = 0; | |
1459 | ||
1460 | do_cleanups (old_cleanups); | |
1461 | ||
1462 | /* If this doesn't call error, we have connected; we don't care if | |
1463 | the request itself succeeds or fails. */ | |
1464 | ||
4014092b | 1465 | mips_request ('r', 0, 0, &err, mips_receive_wait, NULL); |
c906108c SS |
1466 | } |
1467 | ||
1468 | /* Open a connection to the remote board. */ | |
1469 | static void | |
fba45db2 | 1470 | common_open (struct target_ops *ops, char *name, int from_tty, |
98691afe AC |
1471 | enum mips_monitor_type new_monitor, |
1472 | const char *new_monitor_prompt) | |
c906108c SS |
1473 | { |
1474 | char *ptype; | |
1475 | char *serial_port_name; | |
1476 | char *remote_name = 0; | |
1477 | char *local_name = 0; | |
1478 | char **argv; | |
1479 | ||
1480 | if (name == 0) | |
1481 | error ( | |
c5aa993b | 1482 | "To open a MIPS remote debugging connection, you need to specify what serial\n\ |
c906108c | 1483 | device is attached to the target board (e.g., /dev/ttya).\n" |
c5aa993b JM |
1484 | "If you want to use TFTP to download to the board, specify the name of a\n" |
1485 | "temporary file to be used by GDB for downloads as the second argument.\n" | |
1486 | "This filename must be in the form host:filename, where host is the name\n" | |
1487 | "of the host running the TFTP server, and the file must be readable by the\n" | |
1488 | "world. If the local name of the temporary file differs from the name as\n" | |
1489 | "seen from the board via TFTP, specify that name as the third parameter.\n"); | |
c906108c SS |
1490 | |
1491 | /* Parse the serial port name, the optional TFTP name, and the | |
1492 | optional local TFTP name. */ | |
d1a41061 | 1493 | argv = gdb_buildargv (name); |
7a292a7a | 1494 | make_cleanup_freeargv (argv); |
c906108c | 1495 | |
4fcf66da | 1496 | serial_port_name = xstrdup (argv[0]); |
c5aa993b | 1497 | if (argv[1]) /* remote TFTP name specified? */ |
c906108c SS |
1498 | { |
1499 | remote_name = argv[1]; | |
c5aa993b | 1500 | if (argv[2]) /* local TFTP filename specified? */ |
c906108c SS |
1501 | local_name = argv[2]; |
1502 | } | |
1503 | ||
1504 | target_preopen (from_tty); | |
1505 | ||
1506 | if (mips_is_open) | |
1507 | unpush_target (current_ops); | |
1508 | ||
1509 | /* Open and initialize the serial port. */ | |
2cd58942 | 1510 | mips_desc = serial_open (serial_port_name); |
819cc324 | 1511 | if (mips_desc == NULL) |
c906108c SS |
1512 | perror_with_name (serial_port_name); |
1513 | ||
1514 | if (baud_rate != -1) | |
1515 | { | |
2cd58942 | 1516 | if (serial_setbaudrate (mips_desc, baud_rate)) |
c5aa993b | 1517 | { |
2cd58942 | 1518 | serial_close (mips_desc); |
c5aa993b JM |
1519 | perror_with_name (serial_port_name); |
1520 | } | |
c906108c SS |
1521 | } |
1522 | ||
2cd58942 | 1523 | serial_raw (mips_desc); |
c906108c SS |
1524 | |
1525 | /* Open and initialize the optional download port. If it is in the form | |
1526 | hostname#portnumber, it's a UDP socket. If it is in the form | |
1527 | hostname:filename, assume it's the TFTP filename that must be | |
1528 | passed to the DDB board to tell it where to get the load file. */ | |
1529 | if (remote_name) | |
1530 | { | |
1531 | if (strchr (remote_name, '#')) | |
1532 | { | |
2cd58942 | 1533 | udp_desc = serial_open (remote_name); |
c906108c SS |
1534 | if (!udp_desc) |
1535 | perror_with_name ("Unable to open UDP port"); | |
1536 | udp_in_use = 1; | |
1537 | } | |
1538 | else | |
1539 | { | |
1540 | /* Save the remote and local names of the TFTP temp file. If | |
1541 | the user didn't specify a local name, assume it's the same | |
1542 | as the part of the remote name after the "host:". */ | |
1543 | if (tftp_name) | |
b8c9b27d | 1544 | xfree (tftp_name); |
c906108c | 1545 | if (tftp_localname) |
b8c9b27d | 1546 | xfree (tftp_localname); |
c906108c | 1547 | if (local_name == NULL) |
c5aa993b JM |
1548 | if ((local_name = strchr (remote_name, ':')) != NULL) |
1549 | local_name++; /* skip over the colon */ | |
c906108c SS |
1550 | if (local_name == NULL) |
1551 | local_name = remote_name; /* local name same as remote name */ | |
4fcf66da AC |
1552 | tftp_name = xstrdup (remote_name); |
1553 | tftp_localname = xstrdup (local_name); | |
c906108c SS |
1554 | tftp_in_use = 1; |
1555 | } | |
1556 | } | |
1557 | ||
1558 | current_ops = ops; | |
1559 | mips_is_open = 1; | |
1560 | ||
1561 | /* Reset the expected monitor prompt if it's never been set before. */ | |
1562 | if (mips_monitor_prompt == NULL) | |
4fcf66da | 1563 | mips_monitor_prompt = xstrdup (new_monitor_prompt); |
c906108c SS |
1564 | mips_monitor = new_monitor; |
1565 | ||
1566 | mips_initialize (); | |
1567 | ||
1568 | if (from_tty) | |
1569 | printf_unfiltered ("Remote MIPS debugging using %s\n", serial_port_name); | |
1570 | ||
1571 | /* Switch to using remote target now. */ | |
1572 | push_target (ops); | |
1573 | ||
1574 | /* FIXME: Should we call start_remote here? */ | |
1575 | ||
1576 | /* Try to figure out the processor model if possible. */ | |
691c0433 | 1577 | deprecated_mips_set_processor_regs_hack (); |
c906108c | 1578 | |
a193e397 AC |
1579 | /* This is really the job of start_remote however, that makes an |
1580 | assumption that the target is about to print out a status message | |
1581 | of some sort. That doesn't happen here (in fact, it may not be | |
1582 | possible to get the monitor to send the appropriate packet). */ | |
c906108c | 1583 | |
35f196d9 | 1584 | reinit_frame_cache (); |
c906108c SS |
1585 | registers_changed (); |
1586 | stop_pc = read_pc (); | |
b04f3ab4 | 1587 | print_stack_frame (get_selected_frame (NULL), 0, SRC_AND_LOC); |
b8c9b27d | 1588 | xfree (serial_port_name); |
c906108c SS |
1589 | } |
1590 | ||
1591 | static void | |
fba45db2 | 1592 | mips_open (char *name, int from_tty) |
c906108c | 1593 | { |
ef31c1ea | 1594 | const char *monitor_prompt = NULL; |
1cf3db46 UW |
1595 | if (gdbarch_bfd_arch_info (target_gdbarch) != NULL |
1596 | && gdbarch_bfd_arch_info (target_gdbarch)->arch == bfd_arch_mips) | |
ef31c1ea | 1597 | { |
1cf3db46 | 1598 | switch (gdbarch_bfd_arch_info (target_gdbarch)->mach) |
ef31c1ea AC |
1599 | { |
1600 | case bfd_mach_mips4100: | |
1601 | case bfd_mach_mips4300: | |
1602 | case bfd_mach_mips4600: | |
1603 | case bfd_mach_mips4650: | |
1604 | case bfd_mach_mips5000: | |
1605 | monitor_prompt = "<RISQ> "; | |
1606 | break; | |
1607 | } | |
1608 | } | |
1609 | if (monitor_prompt == NULL) | |
1610 | monitor_prompt = "<IDT>"; | |
1611 | common_open (&mips_ops, name, from_tty, MON_IDT, monitor_prompt); | |
c906108c SS |
1612 | } |
1613 | ||
1614 | static void | |
fba45db2 | 1615 | pmon_open (char *name, int from_tty) |
c906108c SS |
1616 | { |
1617 | common_open (&pmon_ops, name, from_tty, MON_PMON, "PMON> "); | |
1618 | } | |
1619 | ||
1620 | static void | |
fba45db2 | 1621 | ddb_open (char *name, int from_tty) |
c906108c SS |
1622 | { |
1623 | common_open (&ddb_ops, name, from_tty, MON_DDB, "NEC010>"); | |
1624 | } | |
1625 | ||
1626 | static void | |
fba45db2 | 1627 | lsi_open (char *name, int from_tty) |
c906108c SS |
1628 | { |
1629 | int i; | |
1630 | ||
1631 | /* Clear the LSI breakpoint table. */ | |
1632 | for (i = 0; i < MAX_LSI_BREAKPOINTS; i++) | |
1633 | lsi_breakpoints[i].type = BREAK_UNUSED; | |
c5aa993b | 1634 | |
c906108c SS |
1635 | common_open (&lsi_ops, name, from_tty, MON_LSI, "PMON> "); |
1636 | } | |
1637 | ||
1638 | /* Close a connection to the remote board. */ | |
1639 | ||
1640 | static void | |
fba45db2 | 1641 | mips_close (int quitting) |
c906108c SS |
1642 | { |
1643 | if (mips_is_open) | |
1644 | { | |
1645 | /* Get the board out of remote debugging mode. */ | |
1646 | (void) mips_exit_debug (); | |
1647 | ||
1648 | close_ports (); | |
1649 | } | |
1650 | } | |
1651 | ||
1652 | /* Detach from the remote board. */ | |
1653 | ||
1654 | static void | |
136d6dae | 1655 | mips_detach (struct target_ops *ops, char *args, int from_tty) |
c906108c SS |
1656 | { |
1657 | if (args) | |
1658 | error ("Argument given to \"detach\" when remotely debugging."); | |
1659 | ||
1660 | pop_target (); | |
1661 | ||
1662 | mips_close (1); | |
1663 | ||
1664 | if (from_tty) | |
1665 | printf_unfiltered ("Ending remote MIPS debugging.\n"); | |
1666 | } | |
1667 | ||
1668 | /* Tell the target board to resume. This does not wait for a reply | |
1669 | from the board, except in the case of single-stepping on LSI boards, | |
1670 | where PMON does return a reply. */ | |
1671 | ||
1672 | static void | |
39f77062 | 1673 | mips_resume (ptid_t ptid, int step, enum target_signal siggnal) |
c906108c SS |
1674 | { |
1675 | int err; | |
1676 | ||
1677 | /* LSI PMON requires returns a reply packet "0x1 s 0x0 0x57f" after | |
1678 | a single step, so we wait for that. */ | |
4014092b | 1679 | mips_request (step ? 's' : 'c', 1, siggnal, |
c906108c SS |
1680 | mips_monitor == MON_LSI && step ? &err : (int *) NULL, |
1681 | mips_receive_wait, NULL); | |
1682 | } | |
1683 | ||
1684 | /* Return the signal corresponding to SIG, where SIG is the number which | |
1685 | the MIPS protocol uses for the signal. */ | |
a78f21af | 1686 | static enum target_signal |
fba45db2 | 1687 | mips_signal_from_protocol (int sig) |
c906108c SS |
1688 | { |
1689 | /* We allow a few more signals than the IDT board actually returns, on | |
1690 | the theory that there is at least *some* hope that perhaps the numbering | |
1691 | for these signals is widely agreed upon. */ | |
1692 | if (sig <= 0 | |
1693 | || sig > 31) | |
1694 | return TARGET_SIGNAL_UNKNOWN; | |
1695 | ||
1696 | /* Don't want to use target_signal_from_host because we are converting | |
1697 | from MIPS signal numbers, not host ones. Our internal numbers | |
1698 | match the MIPS numbers for the signals the board can return, which | |
1699 | are: SIGINT, SIGSEGV, SIGBUS, SIGILL, SIGFPE, SIGTRAP. */ | |
1700 | return (enum target_signal) sig; | |
1701 | } | |
1702 | ||
1703 | /* Wait until the remote stops, and return a wait status. */ | |
1704 | ||
39f77062 KB |
1705 | static ptid_t |
1706 | mips_wait (ptid_t ptid, struct target_waitstatus *status) | |
c906108c SS |
1707 | { |
1708 | int rstatus; | |
1709 | int err; | |
1710 | char buff[DATA_MAXLEN]; | |
1711 | int rpc, rfp, rsp; | |
1712 | char flags[20]; | |
1713 | int nfields; | |
1714 | int i; | |
1715 | ||
1716 | interrupt_count = 0; | |
1717 | hit_watchpoint = 0; | |
1718 | ||
1719 | /* If we have not sent a single step or continue command, then the | |
1720 | board is waiting for us to do something. Return a status | |
1721 | indicating that it is stopped. */ | |
c5aa993b | 1722 | if (!mips_need_reply) |
c906108c SS |
1723 | { |
1724 | status->kind = TARGET_WAITKIND_STOPPED; | |
1725 | status->value.sig = TARGET_SIGNAL_TRAP; | |
39f77062 | 1726 | return inferior_ptid; |
c906108c SS |
1727 | } |
1728 | ||
1729 | /* No timeout; we sit here as long as the program continues to execute. */ | |
1730 | mips_wait_flag = 1; | |
4014092b | 1731 | rstatus = mips_request ('\000', 0, 0, &err, -1, buff); |
c906108c SS |
1732 | mips_wait_flag = 0; |
1733 | if (err) | |
1734 | mips_error ("Remote failure: %s", safe_strerror (errno)); | |
1735 | ||
1736 | /* On returning from a continue, the PMON monitor seems to start | |
1737 | echoing back the messages we send prior to sending back the | |
1738 | ACK. The code can cope with this, but to try and avoid the | |
1739 | unnecessary serial traffic, and "spurious" characters displayed | |
1740 | to the user, we cheat and reset the debug protocol. The problems | |
1741 | seems to be caused by a check on the number of arguments, and the | |
1742 | command length, within the monitor causing it to echo the command | |
1743 | as a bad packet. */ | |
1744 | if (mips_monitor == MON_PMON) | |
1745 | { | |
1746 | mips_exit_debug (); | |
1747 | mips_enter_debug (); | |
1748 | } | |
1749 | ||
1750 | /* See if we got back extended status. If so, pick out the pc, fp, sp, etc... */ | |
1751 | ||
1752 | nfields = sscanf (buff, "0x%*x %*c 0x%*x 0x%*x 0x%x 0x%x 0x%x 0x%*x %s", | |
1753 | &rpc, &rfp, &rsp, flags); | |
1754 | if (nfields >= 3) | |
1755 | { | |
594f7785 | 1756 | struct regcache *regcache = get_current_regcache (); |
2eb4d78b | 1757 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
123a958e | 1758 | char buf[MAX_REGISTER_SIZE]; |
c906108c | 1759 | |
3e8c568d UW |
1760 | store_unsigned_integer (buf, |
1761 | register_size | |
2eb4d78b UW |
1762 | (gdbarch, gdbarch_pc_regnum (gdbarch)), rpc); |
1763 | regcache_raw_supply (regcache, gdbarch_pc_regnum (gdbarch), buf); | |
3e8c568d UW |
1764 | |
1765 | store_unsigned_integer | |
2eb4d78b | 1766 | (buf, register_size (gdbarch, gdbarch_pc_regnum (gdbarch)), rfp); |
594f7785 | 1767 | regcache_raw_supply (regcache, 30, buf); /* This register they are avoiding and so it is unnamed */ |
c906108c | 1768 | |
2eb4d78b UW |
1769 | store_unsigned_integer (buf, register_size (gdbarch, |
1770 | gdbarch_sp_regnum (gdbarch)), rsp); | |
1771 | regcache_raw_supply (regcache, gdbarch_sp_regnum (gdbarch), buf); | |
c906108c | 1772 | |
064f5156 | 1773 | store_unsigned_integer (buf, |
2eb4d78b | 1774 | register_size (gdbarch, |
064f5156 | 1775 | gdbarch_deprecated_fp_regnum |
2eb4d78b | 1776 | (gdbarch)), |
064f5156 UW |
1777 | 0); |
1778 | regcache_raw_supply (regcache, | |
2eb4d78b | 1779 | gdbarch_deprecated_fp_regnum (gdbarch), buf); |
c906108c SS |
1780 | |
1781 | if (nfields == 9) | |
1782 | { | |
1783 | int i; | |
1784 | ||
1785 | for (i = 0; i <= 2; i++) | |
1786 | if (flags[i] == 'r' || flags[i] == 'w') | |
1787 | hit_watchpoint = 1; | |
1788 | else if (flags[i] == '\000') | |
1789 | break; | |
1790 | } | |
1791 | } | |
1792 | ||
1793 | if (strcmp (target_shortname, "lsi") == 0) | |
1794 | { | |
1795 | #if 0 | |
1796 | /* If this is an LSI PMON target, see if we just hit a hardrdware watchpoint. | |
c5aa993b JM |
1797 | Right now, PMON doesn't give us enough information to determine which |
1798 | breakpoint we hit. So we have to look up the PC in our own table | |
1799 | of breakpoints, and if found, assume it's just a normal instruction | |
1800 | fetch breakpoint, not a data watchpoint. FIXME when PMON | |
1801 | provides some way to tell us what type of breakpoint it is. */ | |
c906108c | 1802 | int i; |
c5aa993b | 1803 | CORE_ADDR pc = read_pc (); |
c906108c SS |
1804 | |
1805 | hit_watchpoint = 1; | |
1806 | for (i = 0; i < MAX_LSI_BREAKPOINTS; i++) | |
1807 | { | |
1808 | if (lsi_breakpoints[i].addr == pc | |
1809 | && lsi_breakpoints[i].type == BREAK_FETCH) | |
1810 | { | |
1811 | hit_watchpoint = 0; | |
1812 | break; | |
1813 | } | |
1814 | } | |
1815 | #else | |
1816 | /* If a data breakpoint was hit, PMON returns the following packet: | |
c5aa993b JM |
1817 | 0x1 c 0x0 0x57f 0x1 |
1818 | The return packet from an ordinary breakpoint doesn't have the | |
1819 | extra 0x01 field tacked onto the end. */ | |
c906108c SS |
1820 | if (nfields == 1 && rpc == 1) |
1821 | hit_watchpoint = 1; | |
1822 | #endif | |
1823 | } | |
1824 | ||
1825 | /* NOTE: The following (sig) numbers are defined by PMON: | |
c5aa993b JM |
1826 | SPP_SIGTRAP 5 breakpoint |
1827 | SPP_SIGINT 2 | |
1828 | SPP_SIGSEGV 11 | |
1829 | SPP_SIGBUS 10 | |
1830 | SPP_SIGILL 4 | |
1831 | SPP_SIGFPE 8 | |
1832 | SPP_SIGTERM 15 */ | |
c906108c SS |
1833 | |
1834 | /* Translate a MIPS waitstatus. We use constants here rather than WTERMSIG | |
1835 | and so on, because the constants we want here are determined by the | |
1836 | MIPS protocol and have nothing to do with what host we are running on. */ | |
1837 | if ((rstatus & 0xff) == 0) | |
1838 | { | |
1839 | status->kind = TARGET_WAITKIND_EXITED; | |
1840 | status->value.integer = (((rstatus) >> 8) & 0xff); | |
1841 | } | |
1842 | else if ((rstatus & 0xff) == 0x7f) | |
1843 | { | |
1844 | status->kind = TARGET_WAITKIND_STOPPED; | |
1845 | status->value.sig = mips_signal_from_protocol (((rstatus) >> 8) & 0xff); | |
1846 | ||
1847 | /* If the stop PC is in the _exit function, assume | |
1848 | we hit the 'break 0x3ff' instruction in _exit, so this | |
c5aa993b | 1849 | is not a normal breakpoint. */ |
c906108c SS |
1850 | if (strcmp (target_shortname, "lsi") == 0) |
1851 | { | |
1852 | char *func_name; | |
1853 | CORE_ADDR func_start; | |
c5aa993b | 1854 | CORE_ADDR pc = read_pc (); |
c906108c SS |
1855 | |
1856 | find_pc_partial_function (pc, &func_name, &func_start, NULL); | |
1857 | if (func_name != NULL && strcmp (func_name, "_exit") == 0 | |
1858 | && func_start == pc) | |
1859 | status->kind = TARGET_WAITKIND_EXITED; | |
1860 | } | |
1861 | } | |
1862 | else | |
1863 | { | |
1864 | status->kind = TARGET_WAITKIND_SIGNALLED; | |
1865 | status->value.sig = mips_signal_from_protocol (rstatus & 0x7f); | |
1866 | } | |
1867 | ||
39f77062 | 1868 | return inferior_ptid; |
c906108c SS |
1869 | } |
1870 | ||
1871 | /* We have to map between the register numbers used by gdb and the | |
82e34d2f | 1872 | register numbers used by the debugging protocol. */ |
c906108c SS |
1873 | |
1874 | #define REGNO_OFFSET 96 | |
1875 | ||
1876 | static int | |
74ed0bb4 | 1877 | mips_map_regno (struct gdbarch *gdbarch, int regno) |
c906108c SS |
1878 | { |
1879 | if (regno < 32) | |
1880 | return regno; | |
74ed0bb4 MD |
1881 | if (regno >= mips_regnum (gdbarch)->fp0 |
1882 | && regno < mips_regnum (gdbarch)->fp0 + 32) | |
1883 | return regno - mips_regnum (gdbarch)->fp0 + 32; | |
1884 | else if (regno == mips_regnum (gdbarch)->pc) | |
56cea623 | 1885 | return REGNO_OFFSET + 0; |
74ed0bb4 | 1886 | else if (regno == mips_regnum (gdbarch)->cause) |
56cea623 | 1887 | return REGNO_OFFSET + 1; |
74ed0bb4 | 1888 | else if (regno == mips_regnum (gdbarch)->hi) |
56cea623 | 1889 | return REGNO_OFFSET + 2; |
74ed0bb4 | 1890 | else if (regno == mips_regnum (gdbarch)->lo) |
56cea623 | 1891 | return REGNO_OFFSET + 3; |
74ed0bb4 | 1892 | else if (regno == mips_regnum (gdbarch)->fp_control_status) |
56cea623 | 1893 | return REGNO_OFFSET + 4; |
74ed0bb4 | 1894 | else if (regno == mips_regnum (gdbarch)->fp_implementation_revision) |
56cea623 AC |
1895 | return REGNO_OFFSET + 5; |
1896 | else | |
1897 | /* FIXME: Is there a way to get the status register? */ | |
1898 | return 0; | |
c906108c SS |
1899 | } |
1900 | ||
1901 | /* Fetch the remote registers. */ | |
1902 | ||
1903 | static void | |
56be3814 | 1904 | mips_fetch_registers (struct regcache *regcache, int regno) |
c906108c | 1905 | { |
2eb4d78b | 1906 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
c906108c SS |
1907 | unsigned LONGEST val; |
1908 | int err; | |
1909 | ||
1910 | if (regno == -1) | |
1911 | { | |
2eb4d78b | 1912 | for (regno = 0; regno < gdbarch_num_regs (gdbarch); regno++) |
56be3814 | 1913 | mips_fetch_registers (regcache, regno); |
c906108c SS |
1914 | return; |
1915 | } | |
1916 | ||
2eb4d78b | 1917 | if (regno == gdbarch_deprecated_fp_regnum (gdbarch) |
064f5156 UW |
1918 | || regno == MIPS_ZERO_REGNUM) |
1919 | /* gdbarch_deprecated_fp_regnum on the mips is a hack which is just | |
0ba6dca9 | 1920 | supposed to read zero (see also mips-nat.c). */ |
c906108c SS |
1921 | val = 0; |
1922 | else | |
1923 | { | |
1924 | /* If PMON doesn't support this register, don't waste serial | |
1925 | bandwidth trying to read it. */ | |
74ed0bb4 | 1926 | int pmon_reg = mips_map_regno (gdbarch, regno); |
c906108c SS |
1927 | if (regno != 0 && pmon_reg == 0) |
1928 | val = 0; | |
1929 | else | |
1930 | { | |
1931 | /* Unfortunately the PMON version in the Vr4300 board has been | |
1932 | compiled without the 64bit register access commands. This | |
1933 | means we cannot get hold of the full register width. */ | |
1934 | if (mips_monitor == MON_DDB) | |
4014092b AC |
1935 | val = (unsigned) mips_request ('t', pmon_reg, 0, |
1936 | &err, mips_receive_wait, NULL); | |
c906108c | 1937 | else |
4014092b AC |
1938 | val = mips_request ('r', pmon_reg, 0, |
1939 | &err, mips_receive_wait, NULL); | |
c906108c SS |
1940 | if (err) |
1941 | mips_error ("Can't read register %d: %s", regno, | |
1942 | safe_strerror (errno)); | |
1943 | } | |
1944 | } | |
1945 | ||
1946 | { | |
123a958e | 1947 | char buf[MAX_REGISTER_SIZE]; |
c906108c SS |
1948 | |
1949 | /* We got the number the register holds, but gdb expects to see a | |
1950 | value in the target byte ordering. */ | |
2eb4d78b | 1951 | store_unsigned_integer (buf, register_size (gdbarch, regno), val); |
56be3814 | 1952 | regcache_raw_supply (regcache, regno, buf); |
c906108c SS |
1953 | } |
1954 | } | |
1955 | ||
1956 | /* Prepare to store registers. The MIPS protocol can store individual | |
1957 | registers, so this function doesn't have to do anything. */ | |
1958 | ||
1959 | static void | |
316f2060 | 1960 | mips_prepare_to_store (struct regcache *regcache) |
c906108c SS |
1961 | { |
1962 | } | |
1963 | ||
1964 | /* Store remote register(s). */ | |
1965 | ||
1966 | static void | |
56be3814 | 1967 | mips_store_registers (struct regcache *regcache, int regno) |
c906108c | 1968 | { |
2eb4d78b | 1969 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
56be3814 | 1970 | ULONGEST val; |
c906108c SS |
1971 | int err; |
1972 | ||
1973 | if (regno == -1) | |
1974 | { | |
2eb4d78b | 1975 | for (regno = 0; regno < gdbarch_num_regs (gdbarch); regno++) |
56be3814 | 1976 | mips_store_registers (regcache, regno); |
c906108c SS |
1977 | return; |
1978 | } | |
1979 | ||
56be3814 | 1980 | regcache_cooked_read_unsigned (regcache, regno, &val); |
74ed0bb4 | 1981 | mips_request ('R', mips_map_regno (gdbarch, regno), val, |
c906108c SS |
1982 | &err, mips_receive_wait, NULL); |
1983 | if (err) | |
1984 | mips_error ("Can't write register %d: %s", regno, safe_strerror (errno)); | |
1985 | } | |
1986 | ||
1987 | /* Fetch a word from the target board. */ | |
1988 | ||
c5aa993b | 1989 | static unsigned int |
fba45db2 | 1990 | mips_fetch_word (CORE_ADDR addr) |
c906108c SS |
1991 | { |
1992 | unsigned int val; | |
1993 | int err; | |
1994 | ||
4014092b | 1995 | val = mips_request ('d', addr, 0, &err, mips_receive_wait, NULL); |
c906108c SS |
1996 | if (err) |
1997 | { | |
1998 | /* Data space failed; try instruction space. */ | |
4014092b | 1999 | val = mips_request ('i', addr, 0, &err, |
c906108c SS |
2000 | mips_receive_wait, NULL); |
2001 | if (err) | |
c5aa993b JM |
2002 | mips_error ("Can't read address 0x%s: %s", |
2003 | paddr_nz (addr), safe_strerror (errno)); | |
c906108c SS |
2004 | } |
2005 | return val; | |
2006 | } | |
2007 | ||
2008 | /* Store a word to the target board. Returns errno code or zero for | |
2009 | success. If OLD_CONTENTS is non-NULL, put the old contents of that | |
2010 | memory location there. */ | |
2011 | ||
2012 | /* FIXME! make sure only 32-bit quantities get stored! */ | |
2013 | static int | |
fba45db2 | 2014 | mips_store_word (CORE_ADDR addr, unsigned int val, char *old_contents) |
c906108c SS |
2015 | { |
2016 | int err; | |
2017 | unsigned int oldcontents; | |
2018 | ||
4014092b | 2019 | oldcontents = mips_request ('D', addr, val, &err, |
c906108c SS |
2020 | mips_receive_wait, NULL); |
2021 | if (err) | |
2022 | { | |
2023 | /* Data space failed; try instruction space. */ | |
4014092b | 2024 | oldcontents = mips_request ('I', addr, val, &err, |
c906108c SS |
2025 | mips_receive_wait, NULL); |
2026 | if (err) | |
2027 | return errno; | |
2028 | } | |
2029 | if (old_contents != NULL) | |
2030 | store_unsigned_integer (old_contents, 4, oldcontents); | |
2031 | return 0; | |
2032 | } | |
2033 | ||
2034 | /* Read or write LEN bytes from inferior memory at MEMADDR, | |
2035 | transferring to or from debugger address MYADDR. Write to inferior | |
2036 | if SHOULD_WRITE is nonzero. Returns length of data written or | |
2037 | read; 0 for error. Note that protocol gives us the correct value | |
2038 | for a longword, since it transfers values in ASCII. We want the | |
2039 | byte values, so we have to swap the longword values. */ | |
2040 | ||
4014092b AC |
2041 | static int mask_address_p = 1; |
2042 | ||
c906108c | 2043 | static int |
7d12900b | 2044 | mips_xfer_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len, int write, |
0a65a603 | 2045 | struct mem_attrib *attrib, struct target_ops *target) |
c906108c | 2046 | { |
4014092b AC |
2047 | int i; |
2048 | CORE_ADDR addr; | |
2049 | int count; | |
2050 | char *buffer; | |
2051 | int status; | |
2052 | ||
2053 | /* PMON targets do not cope well with 64 bit addresses. Mask the | |
2054 | value down to 32 bits. */ | |
2055 | if (mask_address_p) | |
2056 | memaddr &= (CORE_ADDR) 0xffffffff; | |
2057 | ||
c906108c | 2058 | /* Round starting address down to longword boundary. */ |
4014092b | 2059 | addr = memaddr & ~3; |
c906108c | 2060 | /* Round ending address up; get number of longwords that makes. */ |
4014092b | 2061 | count = (((memaddr + len) - addr) + 3) / 4; |
c906108c | 2062 | /* Allocate buffer of that many longwords. */ |
4014092b | 2063 | buffer = alloca (count * 4); |
c906108c SS |
2064 | |
2065 | if (write) | |
2066 | { | |
2067 | /* Fill start and end extra bytes of buffer with existing data. */ | |
2068 | if (addr != memaddr || len < 4) | |
2069 | { | |
2070 | /* Need part of initial word -- fetch it. */ | |
2071 | store_unsigned_integer (&buffer[0], 4, mips_fetch_word (addr)); | |
2072 | } | |
2073 | ||
2074 | if (count > 1) | |
2075 | { | |
2076 | /* Need part of last word -- fetch it. FIXME: we do this even | |
2077 | if we don't need it. */ | |
2078 | store_unsigned_integer (&buffer[(count - 1) * 4], 4, | |
2079 | mips_fetch_word (addr + (count - 1) * 4)); | |
2080 | } | |
2081 | ||
2082 | /* Copy data to be written over corresponding part of buffer */ | |
2083 | ||
2084 | memcpy ((char *) buffer + (memaddr & 3), myaddr, len); | |
2085 | ||
2086 | /* Write the entire buffer. */ | |
2087 | ||
2088 | for (i = 0; i < count; i++, addr += 4) | |
2089 | { | |
2090 | status = mips_store_word (addr, | |
c5aa993b | 2091 | extract_unsigned_integer (&buffer[i * 4], 4), |
c906108c SS |
2092 | NULL); |
2093 | /* Report each kilobyte (we download 32-bit words at a time) */ | |
c5aa993b | 2094 | if (i % 256 == 255) |
c906108c SS |
2095 | { |
2096 | printf_unfiltered ("*"); | |
2097 | gdb_flush (gdb_stdout); | |
2098 | } | |
2099 | if (status) | |
2100 | { | |
2101 | errno = status; | |
2102 | return 0; | |
2103 | } | |
2104 | /* FIXME: Do we want a QUIT here? */ | |
2105 | } | |
2106 | if (count >= 256) | |
2107 | printf_unfiltered ("\n"); | |
2108 | } | |
2109 | else | |
2110 | { | |
2111 | /* Read all the longwords */ | |
2112 | for (i = 0; i < count; i++, addr += 4) | |
2113 | { | |
c5aa993b | 2114 | store_unsigned_integer (&buffer[i * 4], 4, mips_fetch_word (addr)); |
c906108c SS |
2115 | QUIT; |
2116 | } | |
2117 | ||
2118 | /* Copy appropriate bytes out of the buffer. */ | |
2119 | memcpy (myaddr, buffer + (memaddr & 3), len); | |
2120 | } | |
2121 | return len; | |
2122 | } | |
2123 | ||
2124 | /* Print info on this target. */ | |
2125 | ||
2126 | static void | |
fba45db2 | 2127 | mips_files_info (struct target_ops *ignore) |
c906108c SS |
2128 | { |
2129 | printf_unfiltered ("Debugging a MIPS board over a serial line.\n"); | |
2130 | } | |
2131 | ||
2132 | /* Kill the process running on the board. This will actually only | |
2133 | work if we are doing remote debugging over the console input. I | |
2134 | think that if IDT/sim had the remote debug interrupt enabled on the | |
2135 | right port, we could interrupt the process with a break signal. */ | |
2136 | ||
2137 | static void | |
fba45db2 | 2138 | mips_kill (void) |
c906108c SS |
2139 | { |
2140 | if (!mips_wait_flag) | |
2141 | return; | |
2142 | ||
2143 | interrupt_count++; | |
2144 | ||
2145 | if (interrupt_count >= 2) | |
2146 | { | |
2147 | interrupt_count = 0; | |
2148 | ||
2149 | target_terminal_ours (); | |
2150 | ||
2151 | if (query ("Interrupted while waiting for the program.\n\ | |
2152 | Give up (and stop debugging it)? ")) | |
2153 | { | |
2154 | /* Clean up in such a way that mips_close won't try to talk to the | |
2155 | board (it almost surely won't work since we weren't able to talk to | |
2156 | it). */ | |
2157 | mips_wait_flag = 0; | |
c5aa993b | 2158 | close_ports (); |
c906108c SS |
2159 | |
2160 | printf_unfiltered ("Ending remote MIPS debugging.\n"); | |
2161 | target_mourn_inferior (); | |
2162 | ||
315a522e | 2163 | deprecated_throw_reason (RETURN_QUIT); |
c906108c SS |
2164 | } |
2165 | ||
2166 | target_terminal_inferior (); | |
2167 | } | |
2168 | ||
2169 | if (remote_debug > 0) | |
2170 | printf_unfiltered ("Sending break\n"); | |
2171 | ||
2cd58942 | 2172 | serial_send_break (mips_desc); |
c906108c SS |
2173 | |
2174 | #if 0 | |
2175 | if (mips_is_open) | |
2176 | { | |
2177 | char cc; | |
2178 | ||
2179 | /* Send a ^C. */ | |
2180 | cc = '\003'; | |
2cd58942 | 2181 | serial_write (mips_desc, &cc, 1); |
c906108c SS |
2182 | sleep (1); |
2183 | target_mourn_inferior (); | |
2184 | } | |
2185 | #endif | |
2186 | } | |
2187 | ||
2188 | /* Start running on the target board. */ | |
2189 | ||
2190 | static void | |
c27cda74 | 2191 | mips_create_inferior (char *execfile, char *args, char **env, int from_tty) |
c906108c SS |
2192 | { |
2193 | CORE_ADDR entry_pt; | |
2194 | ||
2195 | if (args && *args) | |
2196 | { | |
2197 | warning ("\ | |
2198 | Can't pass arguments to remote MIPS board; arguments ignored."); | |
2199 | /* And don't try to use them on the next "run" command. */ | |
2200 | execute_command ("set args", 0); | |
2201 | } | |
2202 | ||
2203 | if (execfile == 0 || exec_bfd == 0) | |
2204 | error ("No executable file specified"); | |
2205 | ||
2206 | entry_pt = (CORE_ADDR) bfd_get_start_address (exec_bfd); | |
2207 | ||
2208 | init_wait_for_inferior (); | |
2209 | ||
39f77062 | 2210 | /* FIXME: Should we set inferior_ptid here? */ |
c906108c | 2211 | |
281b533b | 2212 | write_pc (entry_pt); |
c906108c SS |
2213 | } |
2214 | ||
2215 | /* Clean up after a process. Actually nothing to do. */ | |
2216 | ||
2217 | static void | |
fba45db2 | 2218 | mips_mourn_inferior (void) |
c906108c SS |
2219 | { |
2220 | if (current_ops != NULL) | |
2221 | unpush_target (current_ops); | |
2222 | generic_mourn_inferior (); | |
2223 | } | |
2224 | \f | |
2225 | /* We can write a breakpoint and read the shadow contents in one | |
2226 | operation. */ | |
2227 | ||
aaab4dba AC |
2228 | /* Insert a breakpoint. On targets that don't have built-in |
2229 | breakpoint support, we read the contents of the target location and | |
2230 | stash it, then overwrite it with a breakpoint instruction. ADDR is | |
8181d85f DJ |
2231 | the target location in the target machine. BPT is the breakpoint |
2232 | being inserted or removed, which contains memory for saving the | |
2233 | target contents. */ | |
c906108c SS |
2234 | |
2235 | static int | |
8181d85f | 2236 | mips_insert_breakpoint (struct bp_target_info *bp_tgt) |
c906108c SS |
2237 | { |
2238 | if (monitor_supports_breakpoints) | |
06b1d59c MR |
2239 | return mips_set_breakpoint (bp_tgt->placed_address, MIPS_INSN32_SIZE, |
2240 | BREAK_FETCH); | |
c906108c | 2241 | else |
8181d85f | 2242 | return memory_insert_breakpoint (bp_tgt); |
c906108c SS |
2243 | } |
2244 | ||
2245 | static int | |
8181d85f | 2246 | mips_remove_breakpoint (struct bp_target_info *bp_tgt) |
c906108c SS |
2247 | { |
2248 | if (monitor_supports_breakpoints) | |
06b1d59c MR |
2249 | return mips_clear_breakpoint (bp_tgt->placed_address, MIPS_INSN32_SIZE, |
2250 | BREAK_FETCH); | |
c906108c | 2251 | else |
8181d85f | 2252 | return memory_remove_breakpoint (bp_tgt); |
c906108c SS |
2253 | } |
2254 | ||
c906108c SS |
2255 | /* Tell whether this target can support a hardware breakpoint. CNT |
2256 | is the number of hardware breakpoints already installed. This | |
2257 | implements the TARGET_CAN_USE_HARDWARE_WATCHPOINT macro. */ | |
2258 | ||
2259 | int | |
546143b6 | 2260 | mips_can_use_watchpoint (int type, int cnt, int othertype) |
c906108c | 2261 | { |
c5aa993b | 2262 | return cnt < MAX_LSI_BREAKPOINTS && strcmp (target_shortname, "lsi") == 0; |
c906108c SS |
2263 | } |
2264 | ||
2265 | ||
2266 | /* Compute a don't care mask for the region bounding ADDR and ADDR + LEN - 1. | |
2267 | This is used for memory ref breakpoints. */ | |
2268 | ||
2269 | static unsigned long | |
fba45db2 | 2270 | calculate_mask (CORE_ADDR addr, int len) |
c906108c SS |
2271 | { |
2272 | unsigned long mask; | |
2273 | int i; | |
2274 | ||
2275 | mask = addr ^ (addr + len - 1); | |
2276 | ||
2277 | for (i = 32; i >= 0; i--) | |
2278 | if (mask == 0) | |
2279 | break; | |
2280 | else | |
2281 | mask >>= 1; | |
2282 | ||
2283 | mask = (unsigned long) 0xffffffff >> i; | |
2284 | ||
2285 | return mask; | |
2286 | } | |
2287 | ||
2288 | ||
c906108c SS |
2289 | /* Set a data watchpoint. ADDR and LEN should be obvious. TYPE is 0 |
2290 | for a write watchpoint, 1 for a read watchpoint, or 2 for a read/write | |
2291 | watchpoint. */ | |
2292 | ||
2293 | int | |
546143b6 | 2294 | mips_insert_watchpoint (CORE_ADDR addr, int len, int type) |
c906108c | 2295 | { |
06b1d59c | 2296 | if (mips_set_breakpoint (addr, len, type)) |
c906108c SS |
2297 | return -1; |
2298 | ||
2299 | return 0; | |
2300 | } | |
2301 | ||
2302 | int | |
546143b6 | 2303 | mips_remove_watchpoint (CORE_ADDR addr, int len, int type) |
c906108c | 2304 | { |
06b1d59c | 2305 | if (mips_clear_breakpoint (addr, len, type)) |
c906108c SS |
2306 | return -1; |
2307 | ||
2308 | return 0; | |
2309 | } | |
2310 | ||
2311 | int | |
546143b6 | 2312 | mips_stopped_by_watchpoint (void) |
c906108c SS |
2313 | { |
2314 | return hit_watchpoint; | |
2315 | } | |
2316 | ||
2317 | ||
2318 | /* Insert a breakpoint. */ | |
2319 | ||
2320 | static int | |
06b1d59c | 2321 | mips_set_breakpoint (CORE_ADDR addr, int len, enum break_type type) |
c906108c | 2322 | { |
06b1d59c | 2323 | return mips_common_breakpoint (1, addr, len, type); |
c906108c SS |
2324 | } |
2325 | ||
2326 | ||
2327 | /* Clear a breakpoint. */ | |
2328 | ||
2329 | static int | |
06b1d59c | 2330 | mips_clear_breakpoint (CORE_ADDR addr, int len, enum break_type type) |
c906108c | 2331 | { |
06b1d59c | 2332 | return mips_common_breakpoint (0, addr, len, type); |
c906108c SS |
2333 | } |
2334 | ||
2335 | ||
2336 | /* Check the error code from the return packet for an LSI breakpoint | |
2337 | command. If there's no error, just return 0. If it's a warning, | |
2338 | print the warning text and return 0. If it's an error, print | |
2339 | the error text and return 1. <ADDR> is the address of the breakpoint | |
2340 | that was being set. <RERRFLG> is the error code returned by PMON. | |
06b1d59c | 2341 | This is a helper function for mips_common_breakpoint. */ |
c906108c SS |
2342 | |
2343 | static int | |
06b1d59c | 2344 | mips_check_lsi_error (CORE_ADDR addr, int rerrflg) |
c906108c SS |
2345 | { |
2346 | struct lsi_error *err; | |
2347 | char *saddr = paddr_nz (addr); /* printable address string */ | |
2348 | ||
2349 | if (rerrflg == 0) /* no error */ | |
2350 | return 0; | |
2351 | ||
2352 | /* Warnings can be ORed together, so check them all. */ | |
2353 | if (rerrflg & W_WARN) | |
2354 | { | |
2355 | if (monitor_warnings) | |
2356 | { | |
2357 | int found = 0; | |
2358 | for (err = lsi_warning_table; err->code != 0; err++) | |
2359 | { | |
2360 | if ((err->code & rerrflg) == err->code) | |
2361 | { | |
2362 | found = 1; | |
06b1d59c MR |
2363 | fprintf_unfiltered (gdb_stderr, "\ |
2364 | mips_common_breakpoint (0x%s): Warning: %s\n", | |
c906108c SS |
2365 | saddr, |
2366 | err->string); | |
2367 | } | |
2368 | } | |
2369 | if (!found) | |
06b1d59c MR |
2370 | fprintf_unfiltered (gdb_stderr, "\ |
2371 | mips_common_breakpoint (0x%s): Unknown warning: 0x%x\n", | |
c906108c SS |
2372 | saddr, |
2373 | rerrflg); | |
2374 | } | |
2375 | return 0; | |
2376 | } | |
2377 | ||
2378 | /* Errors are unique, i.e. can't be ORed together. */ | |
2379 | for (err = lsi_error_table; err->code != 0; err++) | |
2380 | { | |
2381 | if ((err->code & rerrflg) == err->code) | |
2382 | { | |
06b1d59c MR |
2383 | fprintf_unfiltered (gdb_stderr, "\ |
2384 | mips_common_breakpoint (0x%s): Error: %s\n", | |
c906108c SS |
2385 | saddr, |
2386 | err->string); | |
2387 | return 1; | |
2388 | } | |
2389 | } | |
06b1d59c MR |
2390 | fprintf_unfiltered (gdb_stderr, "\ |
2391 | mips_common_breakpoint (0x%s): Unknown error: 0x%x\n", | |
c906108c SS |
2392 | saddr, |
2393 | rerrflg); | |
2394 | return 1; | |
2395 | } | |
2396 | ||
2397 | ||
2398 | /* This routine sends a breakpoint command to the remote target. | |
2399 | ||
2400 | <SET> is 1 if setting a breakpoint, or 0 if clearing a breakpoint. | |
2401 | <ADDR> is the address of the breakpoint. | |
2402 | <LEN> the length of the region to break on. | |
2403 | <TYPE> is the type of breakpoint: | |
c5aa993b JM |
2404 | 0 = write (BREAK_WRITE) |
2405 | 1 = read (BREAK_READ) | |
2406 | 2 = read/write (BREAK_ACCESS) | |
2407 | 3 = instruction fetch (BREAK_FETCH) | |
c906108c SS |
2408 | |
2409 | Return 0 if successful; otherwise 1. */ | |
2410 | ||
2411 | static int | |
06b1d59c | 2412 | mips_common_breakpoint (int set, CORE_ADDR addr, int len, enum break_type type) |
c906108c SS |
2413 | { |
2414 | char buf[DATA_MAXLEN + 1]; | |
2415 | char cmd, rcmd; | |
2416 | int rpid, rerrflg, rresponse, rlen; | |
2417 | int nfields; | |
2418 | ||
1cf3db46 | 2419 | addr = gdbarch_addr_bits_remove (target_gdbarch, addr); |
c906108c SS |
2420 | |
2421 | if (mips_monitor == MON_LSI) | |
2422 | { | |
c5aa993b | 2423 | if (set == 0) /* clear breakpoint */ |
c906108c SS |
2424 | { |
2425 | /* The LSI PMON "clear breakpoint" has this form: | |
c5aa993b JM |
2426 | <pid> 'b' <bptn> 0x0 |
2427 | reply: | |
2428 | <pid> 'b' 0x0 <code> | |
c906108c SS |
2429 | |
2430 | <bptn> is a breakpoint number returned by an earlier 'B' command. | |
2431 | Possible return codes: OK, E_BPT. */ | |
2432 | ||
2433 | int i; | |
2434 | ||
2435 | /* Search for the breakpoint in the table. */ | |
2436 | for (i = 0; i < MAX_LSI_BREAKPOINTS; i++) | |
2437 | if (lsi_breakpoints[i].type == type | |
2438 | && lsi_breakpoints[i].addr == addr | |
2439 | && lsi_breakpoints[i].len == len) | |
2440 | break; | |
2441 | ||
2442 | /* Clear the table entry and tell PMON to clear the breakpoint. */ | |
2443 | if (i == MAX_LSI_BREAKPOINTS) | |
2444 | { | |
06b1d59c MR |
2445 | warning ("\ |
2446 | mips_common_breakpoint: Attempt to clear bogus breakpoint at %s\n", | |
c906108c SS |
2447 | paddr_nz (addr)); |
2448 | return 1; | |
2449 | } | |
2450 | ||
2451 | lsi_breakpoints[i].type = BREAK_UNUSED; | |
2452 | sprintf (buf, "0x0 b 0x%x 0x0", i); | |
2453 | mips_send_packet (buf, 1); | |
2454 | ||
2455 | rlen = mips_receive_packet (buf, 1, mips_receive_wait); | |
2456 | buf[rlen] = '\0'; | |
2457 | ||
2458 | nfields = sscanf (buf, "0x%x b 0x0 0x%x", &rpid, &rerrflg); | |
2459 | if (nfields != 2) | |
06b1d59c MR |
2460 | mips_error ("\ |
2461 | mips_common_breakpoint: Bad response from remote board: %s", | |
2462 | buf); | |
c906108c | 2463 | |
06b1d59c | 2464 | return (mips_check_lsi_error (addr, rerrflg)); |
c906108c | 2465 | } |
c5aa993b JM |
2466 | else |
2467 | /* set a breakpoint */ | |
c906108c SS |
2468 | { |
2469 | /* The LSI PMON "set breakpoint" command has this form: | |
c5aa993b JM |
2470 | <pid> 'B' <addr> 0x0 |
2471 | reply: | |
2472 | <pid> 'B' <bptn> <code> | |
c906108c SS |
2473 | |
2474 | The "set data breakpoint" command has this form: | |
2475 | ||
c5aa993b | 2476 | <pid> 'A' <addr1> <type> [<addr2> [<value>]] |
c906108c | 2477 | |
c5aa993b JM |
2478 | where: type= "0x1" = read |
2479 | "0x2" = write | |
2480 | "0x3" = access (read or write) | |
c906108c SS |
2481 | |
2482 | The reply returns two values: | |
c5aa993b JM |
2483 | bptn - a breakpoint number, which is a small integer with |
2484 | possible values of zero through 255. | |
2485 | code - an error return code, a value of zero indicates a | |
2486 | succesful completion, other values indicate various | |
2487 | errors and warnings. | |
2488 | ||
c906108c SS |
2489 | Possible return codes: OK, W_QAL, E_QAL, E_OUT, E_NON. |
2490 | ||
c5aa993b | 2491 | */ |
c906108c SS |
2492 | |
2493 | if (type == BREAK_FETCH) /* instruction breakpoint */ | |
2494 | { | |
2495 | cmd = 'B'; | |
2496 | sprintf (buf, "0x0 B 0x%s 0x0", paddr_nz (addr)); | |
2497 | } | |
c5aa993b JM |
2498 | else |
2499 | /* watchpoint */ | |
c906108c SS |
2500 | { |
2501 | cmd = 'A'; | |
2502 | sprintf (buf, "0x0 A 0x%s 0x%x 0x%s", paddr_nz (addr), | |
c5aa993b | 2503 | type == BREAK_READ ? 1 : (type == BREAK_WRITE ? 2 : 3), |
c906108c SS |
2504 | paddr_nz (addr + len - 1)); |
2505 | } | |
2506 | mips_send_packet (buf, 1); | |
2507 | ||
2508 | rlen = mips_receive_packet (buf, 1, mips_receive_wait); | |
2509 | buf[rlen] = '\0'; | |
2510 | ||
2511 | nfields = sscanf (buf, "0x%x %c 0x%x 0x%x", | |
2512 | &rpid, &rcmd, &rresponse, &rerrflg); | |
2513 | if (nfields != 4 || rcmd != cmd || rresponse > 255) | |
06b1d59c MR |
2514 | mips_error ("\ |
2515 | mips_common_breakpoint: Bad response from remote board: %s", | |
2516 | buf); | |
c906108c SS |
2517 | |
2518 | if (rerrflg != 0) | |
06b1d59c | 2519 | if (mips_check_lsi_error (addr, rerrflg)) |
c906108c SS |
2520 | return 1; |
2521 | ||
2522 | /* rresponse contains PMON's breakpoint number. Record the | |
2523 | information for this breakpoint so we can clear it later. */ | |
2524 | lsi_breakpoints[rresponse].type = type; | |
2525 | lsi_breakpoints[rresponse].addr = addr; | |
c5aa993b | 2526 | lsi_breakpoints[rresponse].len = len; |
c906108c SS |
2527 | |
2528 | return 0; | |
2529 | } | |
2530 | } | |
2531 | else | |
2532 | { | |
2533 | /* On non-LSI targets, the breakpoint command has this form: | |
c5aa993b JM |
2534 | 0x0 <CMD> <ADDR> <MASK> <FLAGS> |
2535 | <MASK> is a don't care mask for addresses. | |
2536 | <FLAGS> is any combination of `r', `w', or `f' for read/write/fetch. | |
c906108c SS |
2537 | */ |
2538 | unsigned long mask; | |
2539 | ||
2540 | mask = calculate_mask (addr, len); | |
2541 | addr &= ~mask; | |
2542 | ||
c5aa993b JM |
2543 | if (set) /* set a breakpoint */ |
2544 | { | |
c906108c SS |
2545 | char *flags; |
2546 | switch (type) | |
2547 | { | |
c5aa993b | 2548 | case BREAK_WRITE: /* write */ |
c906108c SS |
2549 | flags = "w"; |
2550 | break; | |
c5aa993b | 2551 | case BREAK_READ: /* read */ |
c906108c SS |
2552 | flags = "r"; |
2553 | break; | |
c5aa993b | 2554 | case BREAK_ACCESS: /* read/write */ |
c906108c SS |
2555 | flags = "rw"; |
2556 | break; | |
c5aa993b | 2557 | case BREAK_FETCH: /* fetch */ |
c906108c SS |
2558 | flags = "f"; |
2559 | break; | |
2560 | default: | |
e2e0b3e5 | 2561 | internal_error (__FILE__, __LINE__, _("failed internal consistency check")); |
c906108c SS |
2562 | } |
2563 | ||
2564 | cmd = 'B'; | |
2565 | sprintf (buf, "0x0 B 0x%s 0x%s %s", paddr_nz (addr), | |
2566 | paddr_nz (mask), flags); | |
2567 | } | |
2568 | else | |
2569 | { | |
2570 | cmd = 'b'; | |
2571 | sprintf (buf, "0x0 b 0x%s", paddr_nz (addr)); | |
2572 | } | |
2573 | ||
2574 | mips_send_packet (buf, 1); | |
2575 | ||
2576 | rlen = mips_receive_packet (buf, 1, mips_receive_wait); | |
2577 | buf[rlen] = '\0'; | |
2578 | ||
2579 | nfields = sscanf (buf, "0x%x %c 0x%x 0x%x", | |
2580 | &rpid, &rcmd, &rerrflg, &rresponse); | |
2581 | ||
2582 | if (nfields != 4 || rcmd != cmd) | |
06b1d59c MR |
2583 | mips_error ("\ |
2584 | mips_common_breakpoint: Bad response from remote board: %s", | |
c906108c SS |
2585 | buf); |
2586 | ||
2587 | if (rerrflg != 0) | |
2588 | { | |
2589 | /* Ddb returns "0x0 b 0x16 0x0\000", whereas | |
2590 | Cogent returns "0x0 b 0xffffffff 0x16\000": */ | |
2591 | if (mips_monitor == MON_DDB) | |
2592 | rresponse = rerrflg; | |
c5aa993b | 2593 | if (rresponse != 22) /* invalid argument */ |
06b1d59c MR |
2594 | fprintf_unfiltered (gdb_stderr, "\ |
2595 | mips_common_breakpoint (0x%s): Got error: 0x%x\n", | |
c906108c SS |
2596 | paddr_nz (addr), rresponse); |
2597 | return 1; | |
2598 | } | |
2599 | } | |
2600 | return 0; | |
2601 | } | |
2602 | \f | |
2603 | static void | |
fba45db2 | 2604 | send_srec (char *srec, int len, CORE_ADDR addr) |
c906108c SS |
2605 | { |
2606 | while (1) | |
2607 | { | |
2608 | int ch; | |
2609 | ||
2cd58942 | 2610 | serial_write (mips_desc, srec, len); |
c906108c | 2611 | |
688991e6 | 2612 | ch = mips_readchar (remote_timeout); |
c906108c SS |
2613 | |
2614 | switch (ch) | |
2615 | { | |
2616 | case SERIAL_TIMEOUT: | |
2617 | error ("Timeout during download."); | |
2618 | break; | |
2619 | case 0x6: /* ACK */ | |
2620 | return; | |
2621 | case 0x15: /* NACK */ | |
623d3eb1 | 2622 | fprintf_unfiltered (gdb_stderr, "Download got a NACK at byte 0x%s! Retrying.\n", paddr_nz (addr)); |
c906108c SS |
2623 | continue; |
2624 | default: | |
2625 | error ("Download got unexpected ack char: 0x%x, retrying.\n", ch); | |
2626 | } | |
2627 | } | |
2628 | } | |
2629 | ||
2630 | /* Download a binary file by converting it to S records. */ | |
2631 | ||
2632 | static void | |
fba45db2 | 2633 | mips_load_srec (char *args) |
c906108c SS |
2634 | { |
2635 | bfd *abfd; | |
2636 | asection *s; | |
2637 | char *buffer, srec[1024]; | |
2638 | unsigned int i; | |
2639 | unsigned int srec_frame = 200; | |
2640 | int reclen; | |
2641 | static int hashmark = 1; | |
2642 | ||
2643 | buffer = alloca (srec_frame * 2 + 256); | |
2644 | ||
2645 | abfd = bfd_openr (args, 0); | |
2646 | if (!abfd) | |
2647 | { | |
2648 | printf_filtered ("Unable to open file %s\n", args); | |
2649 | return; | |
2650 | } | |
2651 | ||
2652 | if (bfd_check_format (abfd, bfd_object) == 0) | |
2653 | { | |
2654 | printf_filtered ("File is not an object file\n"); | |
2655 | return; | |
2656 | } | |
2657 | ||
2658 | /* This actually causes a download in the IDT binary format: */ | |
2659 | mips_send_command (LOAD_CMD, 0); | |
2660 | ||
2661 | for (s = abfd->sections; s; s = s->next) | |
2662 | { | |
2663 | if (s->flags & SEC_LOAD) | |
2664 | { | |
2665 | unsigned int numbytes; | |
2666 | ||
d4f3574e SS |
2667 | /* FIXME! vma too small????? */ |
2668 | printf_filtered ("%s\t: 0x%4lx .. 0x%4lx ", s->name, | |
2669 | (long) s->vma, | |
2c500098 | 2670 | (long) (s->vma + bfd_get_section_size (s))); |
c906108c SS |
2671 | gdb_flush (gdb_stdout); |
2672 | ||
2c500098 | 2673 | for (i = 0; i < bfd_get_section_size (s); i += numbytes) |
c906108c | 2674 | { |
2c500098 | 2675 | numbytes = min (srec_frame, bfd_get_section_size (s) - i); |
c906108c SS |
2676 | |
2677 | bfd_get_section_contents (abfd, s, buffer, i, numbytes); | |
2678 | ||
1fa79fac MS |
2679 | reclen = mips_make_srec (srec, '3', s->vma + i, |
2680 | buffer, numbytes); | |
c906108c SS |
2681 | send_srec (srec, reclen, s->vma + i); |
2682 | ||
9a4105ab AC |
2683 | if (deprecated_ui_load_progress_hook) |
2684 | deprecated_ui_load_progress_hook (s->name, i); | |
7829b833 | 2685 | |
c906108c SS |
2686 | if (hashmark) |
2687 | { | |
2688 | putchar_unfiltered ('#'); | |
2689 | gdb_flush (gdb_stdout); | |
2690 | } | |
2691 | ||
c5aa993b JM |
2692 | } /* Per-packet (or S-record) loop */ |
2693 | ||
c906108c | 2694 | putchar_unfiltered ('\n'); |
c5aa993b | 2695 | } /* Loadable sections */ |
c906108c | 2696 | } |
c5aa993b | 2697 | if (hashmark) |
c906108c | 2698 | putchar_unfiltered ('\n'); |
c5aa993b | 2699 | |
c906108c SS |
2700 | /* Write a type 7 terminator record. no data for a type 7, and there |
2701 | is no data, so len is 0. */ | |
2702 | ||
2703 | reclen = mips_make_srec (srec, '7', abfd->start_address, NULL, 0); | |
2704 | ||
2705 | send_srec (srec, reclen, abfd->start_address); | |
2706 | ||
2cd58942 | 2707 | serial_flush_input (mips_desc); |
c906108c SS |
2708 | } |
2709 | ||
2710 | /* | |
2711 | * mips_make_srec -- make an srecord. This writes each line, one at a | |
c5aa993b JM |
2712 | * time, each with it's own header and trailer line. |
2713 | * An srecord looks like this: | |
c906108c SS |
2714 | * |
2715 | * byte count-+ address | |
2716 | * start ---+ | | data +- checksum | |
c5aa993b JM |
2717 | * | | | | |
2718 | * S01000006F6B692D746573742E73726563E4 | |
2719 | * S315000448600000000000000000FC00005900000000E9 | |
2720 | * S31A0004000023C1400037DE00F023604000377B009020825000348D | |
2721 | * S30B0004485A0000000000004E | |
2722 | * S70500040000F6 | |
c906108c | 2723 | * |
c5aa993b | 2724 | * S<type><length><address><data><checksum> |
c906108c SS |
2725 | * |
2726 | * Where | |
2727 | * - length | |
2728 | * is the number of bytes following upto the checksum. Note that | |
2729 | * this is not the number of chars following, since it takes two | |
2730 | * chars to represent a byte. | |
2731 | * - type | |
2732 | * is one of: | |
2733 | * 0) header record | |
2734 | * 1) two byte address data record | |
2735 | * 2) three byte address data record | |
2736 | * 3) four byte address data record | |
2737 | * 7) four byte address termination record | |
2738 | * 8) three byte address termination record | |
2739 | * 9) two byte address termination record | |
2740 | * | |
2741 | * - address | |
2742 | * is the start address of the data following, or in the case of | |
2743 | * a termination record, the start address of the image | |
2744 | * - data | |
2745 | * is the data. | |
2746 | * - checksum | |
c5aa993b | 2747 | * is the sum of all the raw byte data in the record, from the length |
c906108c SS |
2748 | * upwards, modulo 256 and subtracted from 255. |
2749 | * | |
2750 | * This routine returns the length of the S-record. | |
2751 | * | |
2752 | */ | |
2753 | ||
2754 | static int | |
fba45db2 KB |
2755 | mips_make_srec (char *buf, int type, CORE_ADDR memaddr, unsigned char *myaddr, |
2756 | int len) | |
c906108c SS |
2757 | { |
2758 | unsigned char checksum; | |
2759 | int i; | |
2760 | ||
2761 | /* Create the header for the srec. addr_size is the number of bytes in the address, | |
2762 | and 1 is the number of bytes in the count. */ | |
2763 | ||
2764 | /* FIXME!! bigger buf required for 64-bit! */ | |
2765 | buf[0] = 'S'; | |
2766 | buf[1] = type; | |
2767 | buf[2] = len + 4 + 1; /* len + 4 byte address + 1 byte checksum */ | |
2768 | /* This assumes S3 style downloads (4byte addresses). There should | |
2769 | probably be a check, or the code changed to make it more | |
2770 | explicit. */ | |
2771 | buf[3] = memaddr >> 24; | |
2772 | buf[4] = memaddr >> 16; | |
2773 | buf[5] = memaddr >> 8; | |
2774 | buf[6] = memaddr; | |
2775 | memcpy (&buf[7], myaddr, len); | |
2776 | ||
2777 | /* Note that the checksum is calculated on the raw data, not the | |
2778 | hexified data. It includes the length, address and the data | |
2779 | portions of the packet. */ | |
2780 | checksum = 0; | |
2781 | buf += 2; /* Point at length byte */ | |
2782 | for (i = 0; i < len + 4 + 1; i++) | |
2783 | checksum += *buf++; | |
2784 | ||
2785 | *buf = ~checksum; | |
2786 | ||
2787 | return len + 8; | |
2788 | } | |
2789 | ||
2790 | /* The following manifest controls whether we enable the simple flow | |
2791 | control support provided by the monitor. If enabled the code will | |
2792 | wait for an affirmative ACK between transmitting packets. */ | |
2793 | #define DOETXACK (1) | |
2794 | ||
2795 | /* The PMON fast-download uses an encoded packet format constructed of | |
2796 | 3byte data packets (encoded as 4 printable ASCII characters), and | |
2797 | escape sequences (preceded by a '/'): | |
2798 | ||
c5aa993b JM |
2799 | 'K' clear checksum |
2800 | 'C' compare checksum (12bit value, not included in checksum calculation) | |
2801 | 'S' define symbol name (for addr) terminated with "," and padded to 4char boundary | |
2802 | 'Z' zero fill multiple of 3bytes | |
2803 | 'B' byte (12bit encoded value, of 8bit data) | |
2804 | 'A' address (36bit encoded value) | |
2805 | 'E' define entry as original address, and exit load | |
c906108c SS |
2806 | |
2807 | The packets are processed in 4 character chunks, so the escape | |
2808 | sequences that do not have any data (or variable length data) | |
2809 | should be padded to a 4 character boundary. The decoder will give | |
2810 | an error if the complete message block size is not a multiple of | |
2811 | 4bytes (size of record). | |
2812 | ||
2813 | The encoding of numbers is done in 6bit fields. The 6bit value is | |
2814 | used to index into this string to get the specific character | |
2815 | encoding for the value: */ | |
2816 | static char encoding[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789,."; | |
2817 | ||
2818 | /* Convert the number of bits required into an encoded number, 6bits | |
2819 | at a time (range 0..63). Keep a checksum if required (passed | |
2820 | pointer non-NULL). The function returns the number of encoded | |
2821 | characters written into the buffer. */ | |
2822 | static int | |
fba45db2 | 2823 | pmon_makeb64 (unsigned long v, char *p, int n, int *chksum) |
c906108c SS |
2824 | { |
2825 | int count = (n / 6); | |
2826 | ||
c5aa993b JM |
2827 | if ((n % 12) != 0) |
2828 | { | |
2829 | fprintf_unfiltered (gdb_stderr, | |
2830 | "Fast encoding bitcount must be a multiple of 12bits: %dbit%s\n", n, (n == 1) ? "" : "s"); | |
2831 | return (0); | |
2832 | } | |
2833 | if (n > 36) | |
2834 | { | |
2835 | fprintf_unfiltered (gdb_stderr, | |
2836 | "Fast encoding cannot process more than 36bits at the moment: %dbits\n", n); | |
2837 | return (0); | |
2838 | } | |
c906108c SS |
2839 | |
2840 | /* Deal with the checksum: */ | |
c5aa993b JM |
2841 | if (chksum != NULL) |
2842 | { | |
2843 | switch (n) | |
2844 | { | |
2845 | case 36: | |
2846 | *chksum += ((v >> 24) & 0xFFF); | |
2847 | case 24: | |
2848 | *chksum += ((v >> 12) & 0xFFF); | |
2849 | case 12: | |
2850 | *chksum += ((v >> 0) & 0xFFF); | |
2851 | } | |
c906108c | 2852 | } |
c906108c | 2853 | |
c5aa993b JM |
2854 | do |
2855 | { | |
2856 | n -= 6; | |
2857 | *p++ = encoding[(v >> n) & 0x3F]; | |
2858 | } | |
2859 | while (n > 0); | |
c906108c | 2860 | |
c5aa993b | 2861 | return (count); |
c906108c SS |
2862 | } |
2863 | ||
2864 | /* Shorthand function (that could be in-lined) to output the zero-fill | |
2865 | escape sequence into the data stream. */ | |
2866 | static int | |
fba45db2 | 2867 | pmon_zeroset (int recsize, char **buff, int *amount, unsigned int *chksum) |
c906108c SS |
2868 | { |
2869 | int count; | |
2870 | ||
c5aa993b | 2871 | sprintf (*buff, "/Z"); |
c906108c SS |
2872 | count = pmon_makeb64 (*amount, (*buff + 2), 12, chksum); |
2873 | *buff += (count + 2); | |
2874 | *amount = 0; | |
c5aa993b | 2875 | return (recsize + count + 2); |
c906108c SS |
2876 | } |
2877 | ||
2878 | static int | |
fba45db2 | 2879 | pmon_checkset (int recsize, char **buff, int *value) |
c906108c SS |
2880 | { |
2881 | int count; | |
2882 | ||
2883 | /* Add the checksum (without updating the value): */ | |
2884 | sprintf (*buff, "/C"); | |
2885 | count = pmon_makeb64 (*value, (*buff + 2), 12, NULL); | |
2886 | *buff += (count + 2); | |
2887 | sprintf (*buff, "\n"); | |
c5aa993b | 2888 | *buff += 2; /* include zero terminator */ |
c906108c SS |
2889 | /* Forcing a checksum validation clears the sum: */ |
2890 | *value = 0; | |
c5aa993b | 2891 | return (recsize + count + 3); |
c906108c SS |
2892 | } |
2893 | ||
2894 | /* Amount of padding we leave after at the end of the output buffer, | |
2895 | for the checksum and line termination characters: */ | |
2896 | #define CHECKSIZE (4 + 4 + 4 + 2) | |
2897 | /* zero-fill, checksum, transfer end and line termination space. */ | |
2898 | ||
2899 | /* The amount of binary data loaded from the object file in a single | |
2900 | operation: */ | |
2901 | #define BINCHUNK (1024) | |
2902 | ||
2903 | /* Maximum line of data accepted by the monitor: */ | |
2904 | #define MAXRECSIZE (550) | |
2905 | /* NOTE: This constant depends on the monitor being used. This value | |
2906 | is for PMON 5.x on the Cogent Vr4300 board. */ | |
2907 | ||
2908 | static void | |
fba45db2 KB |
2909 | pmon_make_fastrec (char **outbuf, unsigned char *inbuf, int *inptr, |
2910 | int inamount, int *recsize, unsigned int *csum, | |
2911 | unsigned int *zerofill) | |
c906108c SS |
2912 | { |
2913 | int count = 0; | |
2914 | char *p = *outbuf; | |
2915 | ||
2916 | /* This is a simple check to ensure that our data will fit within | |
2917 | the maximum allowable record size. Each record output is 4bytes | |
2918 | in length. We must allow space for a pending zero fill command, | |
2919 | the record, and a checksum record. */ | |
c5aa993b JM |
2920 | while ((*recsize < (MAXRECSIZE - CHECKSIZE)) && ((inamount - *inptr) > 0)) |
2921 | { | |
2922 | /* Process the binary data: */ | |
2923 | if ((inamount - *inptr) < 3) | |
2924 | { | |
2925 | if (*zerofill != 0) | |
2926 | *recsize = pmon_zeroset (*recsize, &p, zerofill, csum); | |
2927 | sprintf (p, "/B"); | |
2928 | count = pmon_makeb64 (inbuf[*inptr], &p[2], 12, csum); | |
2929 | p += (2 + count); | |
2930 | *recsize += (2 + count); | |
2931 | (*inptr)++; | |
2932 | } | |
2933 | else | |
2934 | { | |
2935 | unsigned int value = ((inbuf[*inptr + 0] << 16) | (inbuf[*inptr + 1] << 8) | inbuf[*inptr + 2]); | |
2936 | /* Simple check for zero data. TODO: A better check would be | |
2937 | to check the last, and then the middle byte for being zero | |
2938 | (if the first byte is not). We could then check for | |
2939 | following runs of zeros, and if above a certain size it is | |
2940 | worth the 4 or 8 character hit of the byte insertions used | |
2941 | to pad to the start of the zeroes. NOTE: This also depends | |
2942 | on the alignment at the end of the zero run. */ | |
2943 | if (value == 0x00000000) | |
2944 | { | |
2945 | (*zerofill)++; | |
2946 | if (*zerofill == 0xFFF) /* 12bit counter */ | |
2947 | *recsize = pmon_zeroset (*recsize, &p, zerofill, csum); | |
2948 | } | |
2949 | else | |
2950 | { | |
2951 | if (*zerofill != 0) | |
2952 | *recsize = pmon_zeroset (*recsize, &p, zerofill, csum); | |
2953 | count = pmon_makeb64 (value, p, 24, csum); | |
2954 | p += count; | |
2955 | *recsize += count; | |
2956 | } | |
2957 | *inptr += 3; | |
2958 | } | |
c906108c | 2959 | } |
c906108c SS |
2960 | |
2961 | *outbuf = p; | |
2962 | return; | |
2963 | } | |
2964 | ||
2965 | static int | |
fba45db2 | 2966 | pmon_check_ack (char *mesg) |
c906108c SS |
2967 | { |
2968 | #if defined(DOETXACK) | |
2969 | int c; | |
2970 | ||
2971 | if (!tftp_in_use) | |
2972 | { | |
2cd58942 | 2973 | c = serial_readchar (udp_in_use ? udp_desc : mips_desc, |
688991e6 | 2974 | remote_timeout); |
c906108c SS |
2975 | if ((c == SERIAL_TIMEOUT) || (c != 0x06)) |
2976 | { | |
2977 | fprintf_unfiltered (gdb_stderr, | |
2978 | "Failed to receive valid ACK for %s\n", mesg); | |
c5aa993b | 2979 | return (-1); /* terminate the download */ |
c906108c SS |
2980 | } |
2981 | } | |
2982 | #endif /* DOETXACK */ | |
c5aa993b | 2983 | return (0); |
c906108c SS |
2984 | } |
2985 | ||
2986 | /* pmon_download - Send a sequence of characters to the PMON download port, | |
2987 | which is either a serial port or a UDP socket. */ | |
2988 | ||
2989 | static void | |
fba45db2 | 2990 | pmon_start_download (void) |
c906108c SS |
2991 | { |
2992 | if (tftp_in_use) | |
2993 | { | |
2994 | /* Create the temporary download file. */ | |
2995 | if ((tftp_file = fopen (tftp_localname, "w")) == NULL) | |
2996 | perror_with_name (tftp_localname); | |
2997 | } | |
2998 | else | |
2999 | { | |
3000 | mips_send_command (udp_in_use ? LOAD_CMD_UDP : LOAD_CMD, 0); | |
3001 | mips_expect ("Downloading from "); | |
3002 | mips_expect (udp_in_use ? "udp" : "tty0"); | |
3003 | mips_expect (", ^C to abort\r\n"); | |
3004 | } | |
3005 | } | |
3006 | ||
3007 | static int | |
3008 | mips_expect_download (char *string) | |
3009 | { | |
3010 | if (!mips_expect (string)) | |
3011 | { | |
3012 | fprintf_unfiltered (gdb_stderr, "Load did not complete successfully.\n"); | |
3013 | if (tftp_in_use) | |
3014 | remove (tftp_localname); /* Remove temporary file */ | |
3015 | return 0; | |
3016 | } | |
3017 | else | |
3018 | return 1; | |
3019 | } | |
3020 | ||
688991e6 AC |
3021 | static void |
3022 | pmon_check_entry_address (char *entry_address, int final) | |
3023 | { | |
3024 | char hexnumber[9]; /* includes '\0' space */ | |
3025 | mips_expect_timeout (entry_address, tftp_in_use ? 15 : remote_timeout); | |
3026 | sprintf (hexnumber, "%x", final); | |
3027 | mips_expect (hexnumber); | |
3028 | mips_expect ("\r\n"); | |
3029 | } | |
3030 | ||
3031 | static int | |
3032 | pmon_check_total (int bintotal) | |
3033 | { | |
3034 | char hexnumber[9]; /* includes '\0' space */ | |
3035 | mips_expect ("\r\ntotal = 0x"); | |
3036 | sprintf (hexnumber, "%x", bintotal); | |
3037 | mips_expect (hexnumber); | |
3038 | return mips_expect_download (" bytes\r\n"); | |
3039 | } | |
3040 | ||
c906108c | 3041 | static void |
fba45db2 | 3042 | pmon_end_download (int final, int bintotal) |
c906108c | 3043 | { |
c5aa993b | 3044 | char hexnumber[9]; /* includes '\0' space */ |
c906108c SS |
3045 | |
3046 | if (tftp_in_use) | |
3047 | { | |
3048 | static char *load_cmd_prefix = "load -b -s "; | |
3049 | char *cmd; | |
3050 | struct stat stbuf; | |
3051 | ||
3052 | /* Close off the temporary file containing the load data. */ | |
3053 | fclose (tftp_file); | |
3054 | tftp_file = NULL; | |
3055 | ||
3056 | /* Make the temporary file readable by the world. */ | |
3057 | if (stat (tftp_localname, &stbuf) == 0) | |
3058 | chmod (tftp_localname, stbuf.st_mode | S_IROTH); | |
3059 | ||
3060 | /* Must reinitialize the board to prevent PMON from crashing. */ | |
3061 | mips_send_command ("initEther\r", -1); | |
3062 | ||
3063 | /* Send the load command. */ | |
3064 | cmd = xmalloc (strlen (load_cmd_prefix) + strlen (tftp_name) + 2); | |
3065 | strcpy (cmd, load_cmd_prefix); | |
3066 | strcat (cmd, tftp_name); | |
3067 | strcat (cmd, "\r"); | |
3068 | mips_send_command (cmd, 0); | |
b8c9b27d | 3069 | xfree (cmd); |
c906108c SS |
3070 | if (!mips_expect_download ("Downloading from ")) |
3071 | return; | |
3072 | if (!mips_expect_download (tftp_name)) | |
3073 | return; | |
3074 | if (!mips_expect_download (", ^C to abort\r\n")) | |
3075 | return; | |
3076 | } | |
3077 | ||
3078 | /* Wait for the stuff that PMON prints after the load has completed. | |
3079 | The timeout value for use in the tftp case (15 seconds) was picked | |
3080 | arbitrarily but might be too small for really large downloads. FIXME. */ | |
688991e6 | 3081 | switch (mips_monitor) |
c906108c | 3082 | { |
688991e6 AC |
3083 | case MON_LSI: |
3084 | pmon_check_ack ("termination"); | |
3085 | pmon_check_entry_address ("Entry address is ", final); | |
3086 | if (!pmon_check_total (bintotal)) | |
3087 | return; | |
3088 | break; | |
3089 | default: | |
3090 | pmon_check_entry_address ("Entry Address = ", final); | |
c906108c | 3091 | pmon_check_ack ("termination"); |
688991e6 AC |
3092 | if (!pmon_check_total (bintotal)) |
3093 | return; | |
3094 | break; | |
c906108c | 3095 | } |
c906108c SS |
3096 | |
3097 | if (tftp_in_use) | |
3098 | remove (tftp_localname); /* Remove temporary file */ | |
3099 | } | |
3100 | ||
3101 | static void | |
fba45db2 | 3102 | pmon_download (char *buffer, int length) |
c906108c SS |
3103 | { |
3104 | if (tftp_in_use) | |
3105 | fwrite (buffer, 1, length, tftp_file); | |
3106 | else | |
2cd58942 | 3107 | serial_write (udp_in_use ? udp_desc : mips_desc, buffer, length); |
c906108c SS |
3108 | } |
3109 | ||
3110 | static void | |
fba45db2 | 3111 | pmon_load_fast (char *file) |
c906108c SS |
3112 | { |
3113 | bfd *abfd; | |
3114 | asection *s; | |
3115 | unsigned char *binbuf; | |
3116 | char *buffer; | |
3117 | int reclen; | |
3118 | unsigned int csum = 0; | |
3119 | int hashmark = !tftp_in_use; | |
3120 | int bintotal = 0; | |
3121 | int final = 0; | |
3122 | int finished = 0; | |
3123 | ||
c5aa993b JM |
3124 | buffer = (char *) xmalloc (MAXRECSIZE + 1); |
3125 | binbuf = (unsigned char *) xmalloc (BINCHUNK); | |
c906108c | 3126 | |
c5aa993b | 3127 | abfd = bfd_openr (file, 0); |
c906108c | 3128 | if (!abfd) |
c5aa993b JM |
3129 | { |
3130 | printf_filtered ("Unable to open file %s\n", file); | |
3131 | return; | |
3132 | } | |
c906108c | 3133 | |
c5aa993b JM |
3134 | if (bfd_check_format (abfd, bfd_object) == 0) |
3135 | { | |
3136 | printf_filtered ("File is not an object file\n"); | |
3137 | return; | |
3138 | } | |
c906108c SS |
3139 | |
3140 | /* Setup the required download state: */ | |
3141 | mips_send_command ("set dlproto etxack\r", -1); | |
3142 | mips_send_command ("set dlecho off\r", -1); | |
3143 | /* NOTE: We get a "cannot set variable" message if the variable is | |
3144 | already defined to have the argument we give. The code doesn't | |
3145 | care, since it just scans to the next prompt anyway. */ | |
3146 | /* Start the download: */ | |
c5aa993b JM |
3147 | pmon_start_download (); |
3148 | ||
c906108c | 3149 | /* Zero the checksum */ |
c5aa993b JM |
3150 | sprintf (buffer, "/Kxx\n"); |
3151 | reclen = strlen (buffer); | |
c906108c | 3152 | pmon_download (buffer, reclen); |
c5aa993b | 3153 | finished = pmon_check_ack ("/Kxx"); |
c906108c SS |
3154 | |
3155 | for (s = abfd->sections; s && !finished; s = s->next) | |
c5aa993b JM |
3156 | if (s->flags & SEC_LOAD) /* only deal with loadable sections */ |
3157 | { | |
2c500098 AM |
3158 | bintotal += bfd_get_section_size (s); |
3159 | final = (s->vma + bfd_get_section_size (s)); | |
c5aa993b JM |
3160 | |
3161 | printf_filtered ("%s\t: 0x%4x .. 0x%4x ", s->name, (unsigned int) s->vma, | |
2c500098 | 3162 | (unsigned int) (s->vma + bfd_get_section_size (s))); |
c5aa993b JM |
3163 | gdb_flush (gdb_stdout); |
3164 | ||
3165 | /* Output the starting address */ | |
3166 | sprintf (buffer, "/A"); | |
3167 | reclen = pmon_makeb64 (s->vma, &buffer[2], 36, &csum); | |
3168 | buffer[2 + reclen] = '\n'; | |
3169 | buffer[3 + reclen] = '\0'; | |
3170 | reclen += 3; /* for the initial escape code and carriage return */ | |
3171 | pmon_download (buffer, reclen); | |
3172 | finished = pmon_check_ack ("/A"); | |
3173 | ||
3174 | if (!finished) | |
3175 | { | |
3176 | unsigned int binamount; | |
3177 | unsigned int zerofill = 0; | |
3178 | char *bp = buffer; | |
3179 | unsigned int i; | |
3180 | ||
3181 | reclen = 0; | |
3182 | ||
2c500098 AM |
3183 | for (i = 0; |
3184 | i < bfd_get_section_size (s) && !finished; | |
3185 | i += binamount) | |
c5aa993b JM |
3186 | { |
3187 | int binptr = 0; | |
3188 | ||
2c500098 | 3189 | binamount = min (BINCHUNK, bfd_get_section_size (s) - i); |
c5aa993b JM |
3190 | |
3191 | bfd_get_section_contents (abfd, s, binbuf, i, binamount); | |
3192 | ||
3193 | /* This keeps a rolling checksum, until we decide to output | |
3194 | the line: */ | |
3195 | for (; ((binamount - binptr) > 0);) | |
3196 | { | |
1fa79fac MS |
3197 | pmon_make_fastrec (&bp, binbuf, &binptr, binamount, |
3198 | &reclen, &csum, &zerofill); | |
c5aa993b JM |
3199 | if (reclen >= (MAXRECSIZE - CHECKSIZE)) |
3200 | { | |
3201 | reclen = pmon_checkset (reclen, &bp, &csum); | |
3202 | pmon_download (buffer, reclen); | |
3203 | finished = pmon_check_ack ("data record"); | |
3204 | if (finished) | |
3205 | { | |
3206 | zerofill = 0; /* do not transmit pending zerofills */ | |
3207 | break; | |
3208 | } | |
3209 | ||
9a4105ab AC |
3210 | if (deprecated_ui_load_progress_hook) |
3211 | deprecated_ui_load_progress_hook (s->name, i); | |
7829b833 | 3212 | |
c5aa993b JM |
3213 | if (hashmark) |
3214 | { | |
3215 | putchar_unfiltered ('#'); | |
3216 | gdb_flush (gdb_stdout); | |
3217 | } | |
3218 | ||
3219 | bp = buffer; | |
3220 | reclen = 0; /* buffer processed */ | |
3221 | } | |
3222 | } | |
3223 | } | |
3224 | ||
3225 | /* Ensure no out-standing zerofill requests: */ | |
3226 | if (zerofill != 0) | |
3227 | reclen = pmon_zeroset (reclen, &bp, &zerofill, &csum); | |
3228 | ||
3229 | /* and then flush the line: */ | |
3230 | if (reclen > 0) | |
3231 | { | |
3232 | reclen = pmon_checkset (reclen, &bp, &csum); | |
3233 | /* Currently pmon_checkset outputs the line terminator by | |
3234 | default, so we write out the buffer so far: */ | |
3235 | pmon_download (buffer, reclen); | |
3236 | finished = pmon_check_ack ("record remnant"); | |
3237 | } | |
3238 | } | |
3239 | ||
3240 | putchar_unfiltered ('\n'); | |
3241 | } | |
c906108c SS |
3242 | |
3243 | /* Terminate the transfer. We know that we have an empty output | |
3244 | buffer at this point. */ | |
c5aa993b | 3245 | sprintf (buffer, "/E/E\n"); /* include dummy padding characters */ |
c906108c SS |
3246 | reclen = strlen (buffer); |
3247 | pmon_download (buffer, reclen); | |
3248 | ||
c5aa993b JM |
3249 | if (finished) |
3250 | { /* Ignore the termination message: */ | |
2cd58942 | 3251 | serial_flush_input (udp_in_use ? udp_desc : mips_desc); |
c5aa993b JM |
3252 | } |
3253 | else | |
3254 | { /* Deal with termination message: */ | |
3255 | pmon_end_download (final, bintotal); | |
3256 | } | |
c906108c SS |
3257 | |
3258 | return; | |
3259 | } | |
3260 | ||
3261 | /* mips_load -- download a file. */ | |
3262 | ||
3263 | static void | |
fba45db2 | 3264 | mips_load (char *file, int from_tty) |
c906108c SS |
3265 | { |
3266 | /* Get the board out of remote debugging mode. */ | |
3267 | if (mips_exit_debug ()) | |
3268 | error ("mips_load: Couldn't get into monitor mode."); | |
3269 | ||
3270 | if (mips_monitor != MON_IDT) | |
c5aa993b | 3271 | pmon_load_fast (file); |
c906108c | 3272 | else |
c5aa993b | 3273 | mips_load_srec (file); |
c906108c SS |
3274 | |
3275 | mips_initialize (); | |
3276 | ||
3277 | /* Finally, make the PC point at the start address */ | |
3278 | if (mips_monitor != MON_IDT) | |
3279 | { | |
3280 | /* Work around problem where PMON monitor updates the PC after a load | |
c5aa993b JM |
3281 | to a different value than GDB thinks it has. The following ensures |
3282 | that the write_pc() WILL update the PC value: */ | |
74ed0bb4 MD |
3283 | struct regcache *regcache = get_current_regcache (); |
3284 | regcache_set_valid_p (regcache, | |
3285 | gdbarch_pc_regnum (get_regcache_arch (regcache)), | |
3286 | 0); | |
c906108c SS |
3287 | } |
3288 | if (exec_bfd) | |
3289 | write_pc (bfd_get_start_address (exec_bfd)); | |
3290 | ||
39f77062 | 3291 | inferior_ptid = null_ptid; /* No process now */ |
c906108c SS |
3292 | |
3293 | /* This is necessary because many things were based on the PC at the time that | |
3294 | we attached to the monitor, which is no longer valid now that we have loaded | |
3295 | new code (and just changed the PC). Another way to do this might be to call | |
3296 | normal_stop, except that the stack may not be valid, and things would get | |
3297 | horribly confused... */ | |
3298 | ||
3299 | clear_symtab_users (); | |
3300 | } | |
3301 | ||
3302 | ||
3303 | /* Pass the command argument as a packet to PMON verbatim. */ | |
3304 | ||
3305 | static void | |
fba45db2 | 3306 | pmon_command (char *args, int from_tty) |
c906108c SS |
3307 | { |
3308 | char buf[DATA_MAXLEN + 1]; | |
3309 | int rlen; | |
3310 | ||
3311 | sprintf (buf, "0x0 %s", args); | |
3312 | mips_send_packet (buf, 1); | |
3313 | printf_filtered ("Send packet: %s\n", buf); | |
3314 | ||
3315 | rlen = mips_receive_packet (buf, 1, mips_receive_wait); | |
3316 | buf[rlen] = '\0'; | |
3317 | printf_filtered ("Received packet: %s\n", buf); | |
3318 | } | |
3319 | \f | |
a78f21af AC |
3320 | extern initialize_file_ftype _initialize_remote_mips; /* -Wmissing-prototypes */ |
3321 | ||
c906108c | 3322 | void |
fba45db2 | 3323 | _initialize_remote_mips (void) |
c906108c SS |
3324 | { |
3325 | /* Initialize the fields in mips_ops that are common to all four targets. */ | |
3326 | mips_ops.to_longname = "Remote MIPS debugging over serial line"; | |
3327 | mips_ops.to_close = mips_close; | |
3328 | mips_ops.to_detach = mips_detach; | |
3329 | mips_ops.to_resume = mips_resume; | |
3330 | mips_ops.to_fetch_registers = mips_fetch_registers; | |
3331 | mips_ops.to_store_registers = mips_store_registers; | |
3332 | mips_ops.to_prepare_to_store = mips_prepare_to_store; | |
c8e73a31 | 3333 | mips_ops.deprecated_xfer_memory = mips_xfer_memory; |
c906108c SS |
3334 | mips_ops.to_files_info = mips_files_info; |
3335 | mips_ops.to_insert_breakpoint = mips_insert_breakpoint; | |
3336 | mips_ops.to_remove_breakpoint = mips_remove_breakpoint; | |
546143b6 AC |
3337 | mips_ops.to_insert_watchpoint = mips_insert_watchpoint; |
3338 | mips_ops.to_remove_watchpoint = mips_remove_watchpoint; | |
3339 | mips_ops.to_stopped_by_watchpoint = mips_stopped_by_watchpoint; | |
3340 | mips_ops.to_can_use_hw_breakpoint = mips_can_use_watchpoint; | |
c906108c SS |
3341 | mips_ops.to_kill = mips_kill; |
3342 | mips_ops.to_load = mips_load; | |
3343 | mips_ops.to_create_inferior = mips_create_inferior; | |
3344 | mips_ops.to_mourn_inferior = mips_mourn_inferior; | |
49d03eab | 3345 | mips_ops.to_log_command = serial_log_command; |
c906108c SS |
3346 | mips_ops.to_stratum = process_stratum; |
3347 | mips_ops.to_has_all_memory = 1; | |
3348 | mips_ops.to_has_memory = 1; | |
3349 | mips_ops.to_has_stack = 1; | |
3350 | mips_ops.to_has_registers = 1; | |
3351 | mips_ops.to_has_execution = 1; | |
3352 | mips_ops.to_magic = OPS_MAGIC; | |
3353 | ||
3354 | /* Copy the common fields to all four target vectors. */ | |
3355 | pmon_ops = ddb_ops = lsi_ops = mips_ops; | |
3356 | ||
3357 | /* Initialize target-specific fields in the target vectors. */ | |
3358 | mips_ops.to_shortname = "mips"; | |
3359 | mips_ops.to_doc = "\ | |
3360 | Debug a board using the MIPS remote debugging protocol over a serial line.\n\ | |
3361 | The argument is the device it is connected to or, if it contains a colon,\n\ | |
3362 | HOST:PORT to access a board over a network"; | |
3363 | mips_ops.to_open = mips_open; | |
3364 | mips_ops.to_wait = mips_wait; | |
3365 | ||
3366 | pmon_ops.to_shortname = "pmon"; | |
c5aa993b | 3367 | pmon_ops.to_doc = "\ |
c906108c SS |
3368 | Debug a board using the PMON MIPS remote debugging protocol over a serial\n\ |
3369 | line. The argument is the device it is connected to or, if it contains a\n\ | |
3370 | colon, HOST:PORT to access a board over a network"; | |
3371 | pmon_ops.to_open = pmon_open; | |
3372 | pmon_ops.to_wait = mips_wait; | |
3373 | ||
3374 | ddb_ops.to_shortname = "ddb"; | |
3375 | ddb_ops.to_doc = "\ | |
3376 | Debug a board using the PMON MIPS remote debugging protocol over a serial\n\ | |
3377 | line. The first argument is the device it is connected to or, if it contains\n\ | |
3378 | a colon, HOST:PORT to access a board over a network. The optional second\n\ | |
3379 | parameter is the temporary file in the form HOST:FILENAME to be used for\n\ | |
3380 | TFTP downloads to the board. The optional third parameter is the local name\n\ | |
3381 | of the TFTP temporary file, if it differs from the filename seen by the board."; | |
3382 | ddb_ops.to_open = ddb_open; | |
3383 | ddb_ops.to_wait = mips_wait; | |
3384 | ||
3385 | lsi_ops.to_shortname = "lsi"; | |
3386 | lsi_ops.to_doc = pmon_ops.to_doc; | |
3387 | lsi_ops.to_open = lsi_open; | |
3388 | lsi_ops.to_wait = mips_wait; | |
3389 | ||
3390 | /* Add the targets. */ | |
3391 | add_target (&mips_ops); | |
3392 | add_target (&pmon_ops); | |
3393 | add_target (&ddb_ops); | |
3394 | add_target (&lsi_ops); | |
3395 | ||
85c07804 AC |
3396 | add_setshow_zinteger_cmd ("timeout", no_class, &mips_receive_wait, _("\ |
3397 | Set timeout in seconds for remote MIPS serial I/O."), _("\ | |
3398 | Show timeout in seconds for remote MIPS serial I/O."), NULL, | |
3399 | NULL, | |
3400 | NULL, /* FIXME: i18n: */ | |
3401 | &setlist, &showlist); | |
3402 | ||
3403 | add_setshow_zinteger_cmd ("retransmit-timeout", no_class, | |
3404 | &mips_retransmit_wait, _("\ | |
3405 | Set retransmit timeout in seconds for remote MIPS serial I/O."), _("\ | |
3406 | Show retransmit timeout in seconds for remote MIPS serial I/O."), _("\ | |
c906108c | 3407 | This is the number of seconds to wait for an acknowledgement to a packet\n\ |
85c07804 AC |
3408 | before resending the packet."), |
3409 | NULL, | |
3410 | NULL, /* FIXME: i18n: */ | |
3411 | &setlist, &showlist); | |
3412 | ||
3413 | add_setshow_zinteger_cmd ("syn-garbage-limit", no_class, | |
3414 | &mips_syn_garbage, _("\ | |
3415 | Set the maximum number of characters to ignore when scanning for a SYN."), _("\ | |
3416 | Show the maximum number of characters to ignore when scanning for a SYN."), _("\ | |
c906108c | 3417 | This is the maximum number of characters GDB will ignore when trying to\n\ |
cb1a6d5f AC |
3418 | synchronize with the remote system. A value of -1 means that there is no\n\ |
3419 | limit. (Note that these characters are printed out even though they are\n\ | |
85c07804 AC |
3420 | ignored.)"), |
3421 | NULL, | |
3422 | NULL, /* FIXME: i18n: */ | |
3423 | &setlist, &showlist); | |
c906108c | 3424 | |
4d28ad1e AC |
3425 | add_setshow_string_cmd ("monitor-prompt", class_obscure, |
3426 | &mips_monitor_prompt, _("\ | |
3427 | Set the prompt that GDB expects from the monitor."), _("\ | |
3428 | Show the prompt that GDB expects from the monitor."), NULL, | |
3429 | NULL, | |
3430 | NULL, /* FIXME: i18n: */ | |
3431 | &setlist, &showlist); | |
c906108c | 3432 | |
85c07804 AC |
3433 | add_setshow_zinteger_cmd ("monitor-warnings", class_obscure, |
3434 | &monitor_warnings, _("\ | |
3435 | Set printing of monitor warnings."), _("\ | |
3436 | Show printing of monitor warnings."), _("\ | |
3437 | When enabled, monitor warnings about hardware breakpoints will be displayed."), | |
3438 | NULL, | |
3439 | NULL, /* FIXME: i18n: */ | |
3440 | &setlist, &showlist); | |
c906108c | 3441 | |
24ec834b | 3442 | add_com ("pmon", class_obscure, pmon_command, |
1bedd215 | 3443 | _("Send a packet to PMON (must be in debug mode).")); |
4014092b | 3444 | |
5bf193a2 AC |
3445 | add_setshow_boolean_cmd ("mask-address", no_class, &mask_address_p, _("\ |
3446 | Set zeroing of upper 32 bits of 64-bit addresses when talking to PMON targets."), _("\ | |
3447 | Show zeroing of upper 32 bits of 64-bit addresses when talking to PMON targets."), _("\ | |
3448 | Use \"on\" to enable the masking and \"off\" to disable it."), | |
3449 | NULL, | |
3450 | NULL, /* FIXME: i18n: */ | |
3451 | &setlist, &showlist); | |
c906108c | 3452 | } |