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, |
4c38e0a4 | 4 | 2003, 2004, 2006, 2007, 2008, 2009, 2010 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" |
8eeafb51 | 38 | #include "gdbthread.h" |
c906108c | 39 | \f |
c5aa993b | 40 | |
c906108c SS |
41 | /* Breakpoint types. Values 0, 1, and 2 must agree with the watch |
42 | types passed by breakpoint.c to target_insert_watchpoint. | |
43 | Value 3 is our own invention, and is used for ordinary instruction | |
44 | breakpoints. Value 4 is used to mark an unused watchpoint in tables. */ | |
c5aa993b JM |
45 | enum break_type |
46 | { | |
47 | BREAK_WRITE, /* 0 */ | |
48 | BREAK_READ, /* 1 */ | |
49 | BREAK_ACCESS, /* 2 */ | |
50 | BREAK_FETCH, /* 3 */ | |
51 | BREAK_UNUSED /* 4 */ | |
52 | }; | |
c906108c SS |
53 | |
54 | /* Prototypes for local functions. */ | |
55 | ||
a14ed312 | 56 | static int mips_readchar (int timeout); |
c906108c | 57 | |
a14ed312 KB |
58 | static int mips_receive_header (unsigned char *hdr, int *pgarbage, |
59 | int ch, int timeout); | |
c906108c | 60 | |
a14ed312 KB |
61 | static int mips_receive_trailer (unsigned char *trlr, int *pgarbage, |
62 | int *pch, int timeout); | |
c906108c | 63 | |
a14ed312 KB |
64 | static int mips_cksum (const unsigned char *hdr, |
65 | const unsigned char *data, int len); | |
c906108c | 66 | |
a14ed312 | 67 | static void mips_send_packet (const char *s, int get_ack); |
c906108c | 68 | |
a14ed312 | 69 | static void mips_send_command (const char *cmd, int prompt); |
c906108c | 70 | |
a14ed312 | 71 | static int mips_receive_packet (char *buff, int throw_error, int timeout); |
c906108c | 72 | |
4014092b AC |
73 | static ULONGEST mips_request (int cmd, ULONGEST addr, ULONGEST data, |
74 | int *perr, int timeout, char *buff); | |
c906108c | 75 | |
a14ed312 | 76 | static void mips_initialize (void); |
c906108c | 77 | |
a14ed312 | 78 | static void mips_open (char *name, int from_tty); |
c906108c | 79 | |
a14ed312 | 80 | static void pmon_open (char *name, int from_tty); |
c906108c | 81 | |
a14ed312 | 82 | static void ddb_open (char *name, int from_tty); |
c906108c | 83 | |
a14ed312 | 84 | static void lsi_open (char *name, int from_tty); |
c906108c | 85 | |
a14ed312 | 86 | static void mips_close (int quitting); |
c906108c | 87 | |
136d6dae | 88 | static void mips_detach (struct target_ops *ops, char *args, int from_tty); |
c906108c | 89 | |
74ed0bb4 | 90 | static int mips_map_regno (struct gdbarch *, int); |
c906108c | 91 | |
316f2060 | 92 | static void mips_prepare_to_store (struct regcache *regcache); |
c906108c | 93 | |
a14ed312 | 94 | static unsigned int mips_fetch_word (CORE_ADDR addr); |
c906108c | 95 | |
a14ed312 | 96 | static int mips_store_word (CORE_ADDR addr, unsigned int value, |
e17a4113 | 97 | int *old_contents); |
c906108c | 98 | |
7d12900b | 99 | static int mips_xfer_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len, |
29e57380 C |
100 | int write, |
101 | struct mem_attrib *attrib, | |
102 | struct target_ops *target); | |
c906108c | 103 | |
a14ed312 | 104 | static void mips_files_info (struct target_ops *ignore); |
c906108c | 105 | |
383c0389 | 106 | static void mips_mourn_inferior (struct target_ops *ops); |
c906108c | 107 | |
a14ed312 | 108 | static int pmon_makeb64 (unsigned long v, char *p, int n, int *chksum); |
c906108c | 109 | |
a14ed312 KB |
110 | static int pmon_zeroset (int recsize, char **buff, int *amount, |
111 | unsigned int *chksum); | |
c906108c | 112 | |
a14ed312 | 113 | static int pmon_checkset (int recsize, char **buff, int *value); |
c906108c | 114 | |
a14ed312 KB |
115 | static void pmon_make_fastrec (char **outbuf, unsigned char *inbuf, |
116 | int *inptr, int inamount, int *recsize, | |
117 | unsigned int *csum, unsigned int *zerofill); | |
c906108c | 118 | |
a14ed312 | 119 | static int pmon_check_ack (char *mesg); |
c906108c | 120 | |
a14ed312 | 121 | static void pmon_start_download (void); |
c906108c | 122 | |
a14ed312 | 123 | static void pmon_end_download (int final, int bintotal); |
c906108c | 124 | |
a14ed312 | 125 | static void pmon_download (char *buffer, int length); |
c906108c | 126 | |
a14ed312 | 127 | static void pmon_load_fast (char *file); |
c906108c | 128 | |
a14ed312 | 129 | static void mips_load (char *file, int from_tty); |
c906108c | 130 | |
a14ed312 KB |
131 | static int mips_make_srec (char *buffer, int type, CORE_ADDR memaddr, |
132 | unsigned char *myaddr, int len); | |
c906108c | 133 | |
06b1d59c | 134 | static int mips_set_breakpoint (CORE_ADDR addr, int len, enum break_type type); |
c906108c | 135 | |
06b1d59c MR |
136 | static int mips_clear_breakpoint (CORE_ADDR addr, int len, |
137 | enum break_type type); | |
c906108c | 138 | |
06b1d59c MR |
139 | static int mips_common_breakpoint (int set, CORE_ADDR addr, int len, |
140 | enum break_type type); | |
c906108c SS |
141 | |
142 | /* Forward declarations. */ | |
143 | extern struct target_ops mips_ops; | |
144 | extern struct target_ops pmon_ops; | |
145 | extern struct target_ops ddb_ops; | |
c5aa993b | 146 | \f/* *INDENT-OFF* */ |
c906108c SS |
147 | /* The MIPS remote debugging interface is built on top of a simple |
148 | packet protocol. Each packet is organized as follows: | |
149 | ||
c5aa993b JM |
150 | SYN The first character is always a SYN (ASCII 026, or ^V). SYN |
151 | may not appear anywhere else in the packet. Any time a SYN is | |
152 | seen, a new packet should be assumed to have begun. | |
c906108c SS |
153 | |
154 | TYPE_LEN | |
c5aa993b JM |
155 | This byte contains the upper five bits of the logical length |
156 | of the data section, plus a single bit indicating whether this | |
157 | is a data packet or an acknowledgement. The documentation | |
158 | indicates that this bit is 1 for a data packet, but the actual | |
159 | board uses 1 for an acknowledgement. The value of the byte is | |
160 | 0x40 + (ack ? 0x20 : 0) + (len >> 6) | |
161 | (we always have 0 <= len < 1024). Acknowledgement packets do | |
162 | not carry data, and must have a data length of 0. | |
c906108c SS |
163 | |
164 | LEN1 This byte contains the lower six bits of the logical length of | |
c5aa993b JM |
165 | the data section. The value is |
166 | 0x40 + (len & 0x3f) | |
167 | ||
168 | SEQ This byte contains the six bit sequence number of the packet. | |
169 | The value is | |
170 | 0x40 + seq | |
171 | An acknowlegment packet contains the sequence number of the | |
172 | packet being acknowledged plus 1 modulo 64. Data packets are | |
173 | transmitted in sequence. There may only be one outstanding | |
174 | unacknowledged data packet at a time. The sequence numbers | |
175 | are independent in each direction. If an acknowledgement for | |
176 | the previous packet is received (i.e., an acknowledgement with | |
177 | the sequence number of the packet just sent) the packet just | |
178 | sent should be retransmitted. If no acknowledgement is | |
179 | received within a timeout period, the packet should be | |
180 | retransmitted. This has an unfortunate failure condition on a | |
181 | high-latency line, as a delayed acknowledgement may lead to an | |
182 | endless series of duplicate packets. | |
183 | ||
184 | DATA The actual data bytes follow. The following characters are | |
185 | escaped inline with DLE (ASCII 020, or ^P): | |
186 | SYN (026) DLE S | |
187 | DLE (020) DLE D | |
188 | ^C (003) DLE C | |
189 | ^S (023) DLE s | |
190 | ^Q (021) DLE q | |
191 | The additional DLE characters are not counted in the logical | |
192 | length stored in the TYPE_LEN and LEN1 bytes. | |
c906108c SS |
193 | |
194 | CSUM1 | |
195 | CSUM2 | |
196 | CSUM3 | |
c5aa993b JM |
197 | These bytes contain an 18 bit checksum of the complete |
198 | contents of the packet excluding the SEQ byte and the | |
199 | CSUM[123] bytes. The checksum is simply the twos complement | |
200 | addition of all the bytes treated as unsigned characters. The | |
201 | values of the checksum bytes are: | |
202 | CSUM1: 0x40 + ((cksum >> 12) & 0x3f) | |
203 | CSUM2: 0x40 + ((cksum >> 6) & 0x3f) | |
204 | CSUM3: 0x40 + (cksum & 0x3f) | |
c906108c SS |
205 | |
206 | It happens that the MIPS remote debugging protocol always | |
207 | communicates with ASCII strings. Because of this, this | |
208 | implementation doesn't bother to handle the DLE quoting mechanism, | |
209 | since it will never be required. */ | |
9846de1b | 210 | /* *INDENT-ON* */ |
c906108c | 211 | |
c5aa993b | 212 | |
c906108c SS |
213 | /* The SYN character which starts each packet. */ |
214 | #define SYN '\026' | |
215 | ||
216 | /* The 0x40 used to offset each packet (this value ensures that all of | |
217 | the header and trailer bytes, other than SYN, are printable ASCII | |
218 | characters). */ | |
219 | #define HDR_OFFSET 0x40 | |
220 | ||
221 | /* The indices of the bytes in the packet header. */ | |
222 | #define HDR_INDX_SYN 0 | |
223 | #define HDR_INDX_TYPE_LEN 1 | |
224 | #define HDR_INDX_LEN1 2 | |
225 | #define HDR_INDX_SEQ 3 | |
226 | #define HDR_LENGTH 4 | |
227 | ||
228 | /* The data/ack bit in the TYPE_LEN header byte. */ | |
229 | #define TYPE_LEN_DA_BIT 0x20 | |
230 | #define TYPE_LEN_DATA 0 | |
231 | #define TYPE_LEN_ACK TYPE_LEN_DA_BIT | |
232 | ||
233 | /* How to compute the header bytes. */ | |
234 | #define HDR_SET_SYN(data, len, seq) (SYN) | |
235 | #define HDR_SET_TYPE_LEN(data, len, seq) \ | |
236 | (HDR_OFFSET \ | |
237 | + ((data) ? TYPE_LEN_DATA : TYPE_LEN_ACK) \ | |
238 | + (((len) >> 6) & 0x1f)) | |
239 | #define HDR_SET_LEN1(data, len, seq) (HDR_OFFSET + ((len) & 0x3f)) | |
240 | #define HDR_SET_SEQ(data, len, seq) (HDR_OFFSET + (seq)) | |
241 | ||
242 | /* Check that a header byte is reasonable. */ | |
243 | #define HDR_CHECK(ch) (((ch) & HDR_OFFSET) == HDR_OFFSET) | |
244 | ||
245 | /* Get data from the header. These macros evaluate their argument | |
246 | multiple times. */ | |
247 | #define HDR_IS_DATA(hdr) \ | |
248 | (((hdr)[HDR_INDX_TYPE_LEN] & TYPE_LEN_DA_BIT) == TYPE_LEN_DATA) | |
249 | #define HDR_GET_LEN(hdr) \ | |
250 | ((((hdr)[HDR_INDX_TYPE_LEN] & 0x1f) << 6) + (((hdr)[HDR_INDX_LEN1] & 0x3f))) | |
251 | #define HDR_GET_SEQ(hdr) ((unsigned int)(hdr)[HDR_INDX_SEQ] & 0x3f) | |
252 | ||
253 | /* The maximum data length. */ | |
254 | #define DATA_MAXLEN 1023 | |
255 | ||
256 | /* The trailer offset. */ | |
257 | #define TRLR_OFFSET HDR_OFFSET | |
258 | ||
259 | /* The indices of the bytes in the packet trailer. */ | |
260 | #define TRLR_INDX_CSUM1 0 | |
261 | #define TRLR_INDX_CSUM2 1 | |
262 | #define TRLR_INDX_CSUM3 2 | |
263 | #define TRLR_LENGTH 3 | |
264 | ||
265 | /* How to compute the trailer bytes. */ | |
266 | #define TRLR_SET_CSUM1(cksum) (TRLR_OFFSET + (((cksum) >> 12) & 0x3f)) | |
267 | #define TRLR_SET_CSUM2(cksum) (TRLR_OFFSET + (((cksum) >> 6) & 0x3f)) | |
268 | #define TRLR_SET_CSUM3(cksum) (TRLR_OFFSET + (((cksum) ) & 0x3f)) | |
269 | ||
270 | /* Check that a trailer byte is reasonable. */ | |
271 | #define TRLR_CHECK(ch) (((ch) & TRLR_OFFSET) == TRLR_OFFSET) | |
272 | ||
273 | /* Get data from the trailer. This evaluates its argument multiple | |
274 | times. */ | |
275 | #define TRLR_GET_CKSUM(trlr) \ | |
276 | ((((trlr)[TRLR_INDX_CSUM1] & 0x3f) << 12) \ | |
277 | + (((trlr)[TRLR_INDX_CSUM2] & 0x3f) << 6) \ | |
278 | + ((trlr)[TRLR_INDX_CSUM3] & 0x3f)) | |
279 | ||
280 | /* The sequence number modulos. */ | |
281 | #define SEQ_MODULOS (64) | |
282 | ||
283 | /* PMON commands to load from the serial port or UDP socket. */ | |
284 | #define LOAD_CMD "load -b -s tty0\r" | |
285 | #define LOAD_CMD_UDP "load -b -s udp\r" | |
286 | ||
287 | /* The target vectors for the four different remote MIPS targets. | |
288 | These are initialized with code in _initialize_remote_mips instead | |
289 | of static initializers, to make it easier to extend the target_ops | |
290 | vector later. */ | |
291 | struct target_ops mips_ops, pmon_ops, ddb_ops, lsi_ops; | |
292 | ||
c5aa993b JM |
293 | enum mips_monitor_type |
294 | { | |
295 | /* IDT/SIM monitor being used: */ | |
296 | MON_IDT, | |
297 | /* PMON monitor being used: */ | |
298 | MON_PMON, /* 3.0.83 [COGENT,EB,FP,NET] Algorithmics Ltd. Nov 9 1995 17:19:50 */ | |
299 | MON_DDB, /* 2.7.473 [DDBVR4300,EL,FP,NET] Risq Modular Systems, Thu Jun 6 09:28:40 PDT 1996 */ | |
300 | MON_LSI, /* 4.3.12 [EB,FP], LSI LOGIC Corp. Tue Feb 25 13:22:14 1997 */ | |
301 | /* Last and unused value, for sizing vectors, etc. */ | |
302 | MON_LAST | |
303 | }; | |
c906108c SS |
304 | static enum mips_monitor_type mips_monitor = MON_LAST; |
305 | ||
306 | /* The monitor prompt text. If the user sets the PMON prompt | |
307 | to some new value, the GDB `set monitor-prompt' command must also | |
308 | be used to inform GDB about the expected prompt. Otherwise, GDB | |
309 | will not be able to connect to PMON in mips_initialize(). | |
310 | If the `set monitor-prompt' command is not used, the expected | |
311 | default prompt will be set according the target: | |
c5aa993b JM |
312 | target prompt |
313 | ----- ----- | |
314 | pmon PMON> | |
315 | ddb NEC010> | |
316 | lsi PMON> | |
317 | */ | |
c906108c SS |
318 | static char *mips_monitor_prompt; |
319 | ||
320 | /* Set to 1 if the target is open. */ | |
321 | static int mips_is_open; | |
322 | ||
323 | /* Currently active target description (if mips_is_open == 1) */ | |
324 | static struct target_ops *current_ops; | |
325 | ||
326 | /* Set to 1 while the connection is being initialized. */ | |
327 | static int mips_initializing; | |
328 | ||
329 | /* Set to 1 while the connection is being brought down. */ | |
330 | static int mips_exiting; | |
331 | ||
332 | /* The next sequence number to send. */ | |
333 | static unsigned int mips_send_seq; | |
334 | ||
335 | /* The next sequence number we expect to receive. */ | |
336 | static unsigned int mips_receive_seq; | |
337 | ||
338 | /* The time to wait before retransmitting a packet, in seconds. */ | |
339 | static int mips_retransmit_wait = 3; | |
340 | ||
341 | /* The number of times to try retransmitting a packet before giving up. */ | |
342 | static int mips_send_retries = 10; | |
343 | ||
344 | /* The number of garbage characters to accept when looking for an | |
345 | SYN for the next packet. */ | |
59d521c1 | 346 | static int mips_syn_garbage = 10; |
c906108c SS |
347 | |
348 | /* The time to wait for a packet, in seconds. */ | |
349 | static int mips_receive_wait = 5; | |
350 | ||
351 | /* Set if we have sent a packet to the board but have not yet received | |
352 | a reply. */ | |
353 | static int mips_need_reply = 0; | |
354 | ||
355 | /* Handle used to access serial I/O stream. */ | |
819cc324 | 356 | static struct serial *mips_desc; |
c906108c SS |
357 | |
358 | /* UDP handle used to download files to target. */ | |
819cc324 | 359 | static struct serial *udp_desc; |
c906108c SS |
360 | static int udp_in_use; |
361 | ||
362 | /* TFTP filename used to download files to DDB board, in the form | |
363 | host:filename. */ | |
364 | static char *tftp_name; /* host:filename */ | |
365 | static char *tftp_localname; /* filename portion of above */ | |
366 | static int tftp_in_use; | |
367 | static FILE *tftp_file; | |
368 | ||
369 | /* Counts the number of times the user tried to interrupt the target (usually | |
370 | via ^C. */ | |
371 | static int interrupt_count; | |
372 | ||
373 | /* If non-zero, means that the target is running. */ | |
374 | static int mips_wait_flag = 0; | |
375 | ||
376 | /* If non-zero, monitor supports breakpoint commands. */ | |
d4f3574e | 377 | static int monitor_supports_breakpoints = 0; |
c906108c SS |
378 | |
379 | /* Data cache header. */ | |
380 | ||
c5aa993b | 381 | #if 0 /* not used (yet?) */ |
c906108c SS |
382 | static DCACHE *mips_dcache; |
383 | #endif | |
384 | ||
385 | /* Non-zero means that we've just hit a read or write watchpoint */ | |
386 | static int hit_watchpoint; | |
387 | ||
388 | /* Table of breakpoints/watchpoints (used only on LSI PMON target). | |
389 | The table is indexed by a breakpoint number, which is an integer | |
390 | from 0 to 255 returned by the LSI PMON when a breakpoint is set. | |
c5aa993b | 391 | */ |
c906108c SS |
392 | #define MAX_LSI_BREAKPOINTS 256 |
393 | struct lsi_breakpoint_info | |
c5aa993b JM |
394 | { |
395 | enum break_type type; /* type of breakpoint */ | |
396 | CORE_ADDR addr; /* address of breakpoint */ | |
397 | int len; /* length of region being watched */ | |
398 | unsigned long value; /* value to watch */ | |
399 | } | |
400 | lsi_breakpoints[MAX_LSI_BREAKPOINTS]; | |
c906108c SS |
401 | |
402 | /* Error/warning codes returned by LSI PMON for breakpoint commands. | |
403 | Warning values may be ORed together; error values may not. */ | |
c5aa993b JM |
404 | #define W_WARN 0x100 /* This bit is set if the error code is a warning */ |
405 | #define W_MSK 0x101 /* warning: Range feature is supported via mask */ | |
406 | #define W_VAL 0x102 /* warning: Value check is not supported in hardware */ | |
407 | #define W_QAL 0x104 /* warning: Requested qualifiers are not supported in hardware */ | |
408 | ||
409 | #define E_ERR 0x200 /* This bit is set if the error code is an error */ | |
410 | #define E_BPT 0x200 /* error: No such breakpoint number */ | |
411 | #define E_RGE 0x201 /* error: Range is not supported */ | |
412 | #define E_QAL 0x202 /* error: The requested qualifiers can not be used */ | |
413 | #define E_OUT 0x203 /* error: Out of hardware resources */ | |
414 | #define E_NON 0x204 /* error: Hardware breakpoint not supported */ | |
c906108c SS |
415 | |
416 | struct lsi_error | |
c5aa993b JM |
417 | { |
418 | int code; /* error code */ | |
419 | char *string; /* string associated with this code */ | |
420 | }; | |
c906108c SS |
421 | |
422 | struct lsi_error lsi_warning_table[] = | |
423 | { | |
c5aa993b JM |
424 | {W_MSK, "Range feature is supported via mask"}, |
425 | {W_VAL, "Value check is not supported in hardware"}, | |
426 | {W_QAL, "Requested qualifiers are not supported in hardware"}, | |
427 | {0, NULL} | |
c906108c SS |
428 | }; |
429 | ||
430 | struct lsi_error lsi_error_table[] = | |
c5aa993b JM |
431 | { |
432 | {E_BPT, "No such breakpoint number"}, | |
433 | {E_RGE, "Range is not supported"}, | |
434 | {E_QAL, "The requested qualifiers can not be used"}, | |
435 | {E_OUT, "Out of hardware resources"}, | |
436 | {E_NON, "Hardware breakpoint not supported"}, | |
437 | {0, NULL} | |
c906108c SS |
438 | }; |
439 | ||
440 | /* Set to 1 with the 'set monitor-warnings' command to enable printing | |
441 | of warnings returned by PMON when hardware breakpoints are used. */ | |
442 | static int monitor_warnings; | |
443 | ||
8eeafb51 KB |
444 | /* This is the ptid we use while we're connected to the remote. Its |
445 | value is arbitrary, as the remote-mips target doesn't have a notion of | |
446 | processes or threads, but we need something non-null to place in | |
447 | inferior_ptid. */ | |
448 | static ptid_t remote_mips_ptid; | |
c906108c SS |
449 | |
450 | static void | |
fba45db2 | 451 | close_ports (void) |
c906108c SS |
452 | { |
453 | mips_is_open = 0; | |
2cd58942 | 454 | serial_close (mips_desc); |
c906108c SS |
455 | |
456 | if (udp_in_use) | |
457 | { | |
2cd58942 | 458 | serial_close (udp_desc); |
c906108c SS |
459 | udp_in_use = 0; |
460 | } | |
461 | tftp_in_use = 0; | |
462 | } | |
c5aa993b | 463 | |
c906108c SS |
464 | /* Handle low-level error that we can't recover from. Note that just |
465 | error()ing out from target_wait or some such low-level place will cause | |
466 | all hell to break loose--the rest of GDB will tend to get left in an | |
467 | inconsistent state. */ | |
468 | ||
469 | static NORETURN void | |
c5aa993b | 470 | mips_error (char *string,...) |
c906108c SS |
471 | { |
472 | va_list args; | |
473 | ||
c906108c | 474 | va_start (args, string); |
c5aa993b | 475 | |
c906108c | 476 | target_terminal_ours (); |
c5aa993b | 477 | wrap_here (""); /* Force out any buffered output */ |
c906108c SS |
478 | gdb_flush (gdb_stdout); |
479 | if (error_pre_print) | |
ab4e3d93 | 480 | fputs_filtered (error_pre_print, gdb_stderr); |
c906108c SS |
481 | vfprintf_filtered (gdb_stderr, string, args); |
482 | fprintf_filtered (gdb_stderr, "\n"); | |
483 | va_end (args); | |
484 | gdb_flush (gdb_stderr); | |
485 | ||
486 | /* Clean up in such a way that mips_close won't try to talk to the | |
487 | board (it almost surely won't work since we weren't able to talk to | |
488 | it). */ | |
489 | close_ports (); | |
490 | ||
491 | printf_unfiltered ("Ending remote MIPS debugging.\n"); | |
8eeafb51 KB |
492 | if (!ptid_equal (inferior_ptid, null_ptid)) |
493 | target_mourn_inferior (); | |
c906108c | 494 | |
315a522e | 495 | deprecated_throw_reason (RETURN_ERROR); |
c906108c SS |
496 | } |
497 | ||
498 | /* putc_readable - print a character, displaying non-printable chars in | |
499 | ^x notation or in hex. */ | |
500 | ||
501 | static void | |
fba45db2 | 502 | fputc_readable (int ch, struct ui_file *file) |
c906108c SS |
503 | { |
504 | if (ch == '\n') | |
9846de1b | 505 | fputc_unfiltered ('\n', file); |
c906108c | 506 | else if (ch == '\r') |
9846de1b | 507 | fprintf_unfiltered (file, "\\r"); |
c5aa993b | 508 | else if (ch < 0x20) /* ASCII control character */ |
9846de1b | 509 | fprintf_unfiltered (file, "^%c", ch + '@'); |
c5aa993b | 510 | else if (ch >= 0x7f) /* non-ASCII characters (rubout or greater) */ |
9846de1b | 511 | fprintf_unfiltered (file, "[%02x]", ch & 0xff); |
c906108c | 512 | else |
9846de1b | 513 | fputc_unfiltered (ch, file); |
c906108c SS |
514 | } |
515 | ||
516 | ||
517 | /* puts_readable - print a string, displaying non-printable chars in | |
518 | ^x notation or in hex. */ | |
519 | ||
520 | static void | |
98691afe | 521 | fputs_readable (const char *string, struct ui_file *file) |
c906108c SS |
522 | { |
523 | int c; | |
524 | ||
525 | while ((c = *string++) != '\0') | |
9846de1b | 526 | fputc_readable (c, file); |
c906108c SS |
527 | } |
528 | ||
529 | ||
530 | /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if | |
531 | timed out. TIMEOUT specifies timeout value in seconds. | |
c5aa993b | 532 | */ |
c906108c | 533 | |
a78f21af | 534 | static int |
98691afe | 535 | mips_expect_timeout (const char *string, int timeout) |
c906108c | 536 | { |
98691afe | 537 | const char *p = string; |
c906108c SS |
538 | |
539 | if (remote_debug) | |
540 | { | |
9846de1b JM |
541 | fprintf_unfiltered (gdb_stdlog, "Expected \""); |
542 | fputs_readable (string, gdb_stdlog); | |
543 | fprintf_unfiltered (gdb_stdlog, "\", got \""); | |
c906108c SS |
544 | } |
545 | ||
8edbea78 | 546 | immediate_quit++; |
c906108c SS |
547 | while (1) |
548 | { | |
549 | int c; | |
550 | ||
2cd58942 AC |
551 | /* Must use serial_readchar() here cuz mips_readchar would get |
552 | confused if we were waiting for the mips_monitor_prompt... */ | |
c906108c | 553 | |
2cd58942 | 554 | c = serial_readchar (mips_desc, timeout); |
c906108c SS |
555 | |
556 | if (c == SERIAL_TIMEOUT) | |
557 | { | |
558 | if (remote_debug) | |
9846de1b | 559 | fprintf_unfiltered (gdb_stdlog, "\": FAIL\n"); |
c906108c SS |
560 | return 0; |
561 | } | |
562 | ||
563 | if (remote_debug) | |
9846de1b | 564 | fputc_readable (c, gdb_stdlog); |
c906108c SS |
565 | |
566 | if (c == *p++) | |
c5aa993b | 567 | { |
c906108c SS |
568 | if (*p == '\0') |
569 | { | |
8edbea78 | 570 | immediate_quit--; |
c906108c | 571 | if (remote_debug) |
9846de1b | 572 | fprintf_unfiltered (gdb_stdlog, "\": OK\n"); |
c906108c SS |
573 | return 1; |
574 | } | |
575 | } | |
576 | else | |
577 | { | |
578 | p = string; | |
579 | if (c == *p) | |
580 | p++; | |
581 | } | |
582 | } | |
583 | } | |
584 | ||
585 | /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if | |
586 | timed out. The timeout value is hard-coded to 2 seconds. Use | |
587 | mips_expect_timeout if a different timeout value is needed. | |
c5aa993b | 588 | */ |
c906108c | 589 | |
a78f21af | 590 | static int |
98691afe | 591 | mips_expect (const char *string) |
c906108c | 592 | { |
688991e6 | 593 | return mips_expect_timeout (string, remote_timeout); |
c906108c SS |
594 | } |
595 | ||
c906108c | 596 | /* Read a character from the remote, aborting on error. Returns |
2cd58942 AC |
597 | SERIAL_TIMEOUT on timeout (since that's what serial_readchar() |
598 | returns). FIXME: If we see the string mips_monitor_prompt from the | |
599 | board, then we are debugging on the main console port, and we have | |
600 | somehow dropped out of remote debugging mode. In this case, we | |
601 | automatically go back in to remote debugging mode. This is a hack, | |
602 | put in because I can't find any way for a program running on the | |
603 | remote board to terminate without also ending remote debugging | |
c906108c SS |
604 | mode. I assume users won't have any trouble with this; for one |
605 | thing, the IDT documentation generally assumes that the remote | |
606 | debugging port is not the console port. This is, however, very | |
607 | convenient for DejaGnu when you only have one connected serial | |
608 | port. */ | |
609 | ||
610 | static int | |
fba45db2 | 611 | mips_readchar (int timeout) |
c906108c SS |
612 | { |
613 | int ch; | |
614 | static int state = 0; | |
615 | int mips_monitor_prompt_len = strlen (mips_monitor_prompt); | |
616 | ||
c906108c SS |
617 | { |
618 | int i; | |
619 | ||
620 | i = timeout; | |
621 | if (i == -1 && watchdog > 0) | |
c5aa993b | 622 | i = watchdog; |
c906108c | 623 | } |
c906108c SS |
624 | |
625 | if (state == mips_monitor_prompt_len) | |
626 | timeout = 1; | |
2cd58942 | 627 | ch = serial_readchar (mips_desc, timeout); |
7a292a7a | 628 | |
c5aa993b | 629 | if (ch == SERIAL_TIMEOUT && timeout == -1) /* Watchdog went off */ |
c906108c SS |
630 | { |
631 | target_mourn_inferior (); | |
632 | error ("Watchdog has expired. Target detached.\n"); | |
633 | } | |
7a292a7a | 634 | |
c906108c SS |
635 | if (ch == SERIAL_EOF) |
636 | mips_error ("End of file from remote"); | |
637 | if (ch == SERIAL_ERROR) | |
638 | mips_error ("Error reading from remote: %s", safe_strerror (errno)); | |
639 | if (remote_debug > 1) | |
640 | { | |
641 | /* Don't use _filtered; we can't deal with a QUIT out of | |
c5aa993b | 642 | target_wait, and I think this might be called from there. */ |
c906108c | 643 | if (ch != SERIAL_TIMEOUT) |
9846de1b | 644 | fprintf_unfiltered (gdb_stdlog, "Read '%c' %d 0x%x\n", ch, ch, ch); |
c906108c | 645 | else |
9846de1b | 646 | fprintf_unfiltered (gdb_stdlog, "Timed out in read\n"); |
c906108c SS |
647 | } |
648 | ||
649 | /* If we have seen mips_monitor_prompt and we either time out, or | |
650 | we see a @ (which was echoed from a packet we sent), reset the | |
651 | board as described above. The first character in a packet after | |
652 | the SYN (which is not echoed) is always an @ unless the packet is | |
653 | more than 64 characters long, which ours never are. */ | |
654 | if ((ch == SERIAL_TIMEOUT || ch == '@') | |
655 | && state == mips_monitor_prompt_len | |
c5aa993b JM |
656 | && !mips_initializing |
657 | && !mips_exiting) | |
c906108c SS |
658 | { |
659 | if (remote_debug > 0) | |
660 | /* Don't use _filtered; we can't deal with a QUIT out of | |
661 | target_wait, and I think this might be called from there. */ | |
9846de1b | 662 | fprintf_unfiltered (gdb_stdlog, "Reinitializing MIPS debugging mode\n"); |
c906108c SS |
663 | |
664 | mips_need_reply = 0; | |
665 | mips_initialize (); | |
666 | ||
667 | state = 0; | |
668 | ||
669 | /* At this point, about the only thing we can do is abort the command | |
c5aa993b | 670 | in progress and get back to command level as quickly as possible. */ |
c906108c SS |
671 | |
672 | error ("Remote board reset, debug protocol re-initialized."); | |
673 | } | |
674 | ||
675 | if (ch == mips_monitor_prompt[state]) | |
676 | ++state; | |
677 | else | |
678 | state = 0; | |
679 | ||
680 | return ch; | |
681 | } | |
682 | ||
683 | /* Get a packet header, putting the data in the supplied buffer. | |
684 | PGARBAGE is a pointer to the number of garbage characters received | |
685 | so far. CH is the last character received. Returns 0 for success, | |
686 | or -1 for timeout. */ | |
687 | ||
688 | static int | |
fba45db2 | 689 | mips_receive_header (unsigned char *hdr, int *pgarbage, int ch, int timeout) |
c906108c SS |
690 | { |
691 | int i; | |
692 | ||
693 | while (1) | |
694 | { | |
695 | /* Wait for a SYN. mips_syn_garbage is intended to prevent | |
c5aa993b JM |
696 | sitting here indefinitely if the board sends us one garbage |
697 | character per second. ch may already have a value from the | |
698 | last time through the loop. */ | |
c906108c SS |
699 | while (ch != SYN) |
700 | { | |
701 | ch = mips_readchar (timeout); | |
702 | if (ch == SERIAL_TIMEOUT) | |
c5aa993b | 703 | return -1; |
c906108c SS |
704 | if (ch != SYN) |
705 | { | |
706 | /* Printing the character here lets the user of gdb see | |
c5aa993b | 707 | what the program is outputting, if the debugging is |
59d521c1 AC |
708 | being done on the console port. Don't use _filtered: |
709 | we can't deal with a QUIT out of target_wait and | |
710 | buffered target output confuses the user. */ | |
711 | if (!mips_initializing || remote_debug > 0) | |
712 | { | |
713 | if (isprint (ch) || isspace (ch)) | |
714 | { | |
715 | fputc_unfiltered (ch, gdb_stdtarg); | |
716 | } | |
717 | else | |
718 | { | |
719 | fputc_readable (ch, gdb_stdtarg); | |
720 | } | |
721 | gdb_flush (gdb_stdtarg); | |
722 | } | |
723 | ||
724 | /* Only count unprintable characters. */ | |
725 | if (! (isprint (ch) || isspace (ch))) | |
726 | (*pgarbage) += 1; | |
727 | ||
c906108c SS |
728 | if (mips_syn_garbage > 0 |
729 | && *pgarbage > mips_syn_garbage) | |
c5aa993b | 730 | mips_error ("Debug protocol failure: more than %d characters before a sync.", |
c906108c SS |
731 | mips_syn_garbage); |
732 | } | |
733 | } | |
734 | ||
735 | /* Get the packet header following the SYN. */ | |
736 | for (i = 1; i < HDR_LENGTH; i++) | |
737 | { | |
738 | ch = mips_readchar (timeout); | |
739 | if (ch == SERIAL_TIMEOUT) | |
c5aa993b | 740 | return -1; |
c906108c | 741 | /* Make sure this is a header byte. */ |
c5aa993b | 742 | if (ch == SYN || !HDR_CHECK (ch)) |
c906108c SS |
743 | break; |
744 | ||
745 | hdr[i] = ch; | |
746 | } | |
747 | ||
748 | /* If we got the complete header, we can return. Otherwise we | |
c5aa993b | 749 | loop around and keep looking for SYN. */ |
c906108c | 750 | if (i >= HDR_LENGTH) |
c5aa993b | 751 | return 0; |
c906108c SS |
752 | } |
753 | } | |
754 | ||
755 | /* Get a packet header, putting the data in the supplied buffer. | |
756 | PGARBAGE is a pointer to the number of garbage characters received | |
757 | so far. The last character read is returned in *PCH. Returns 0 | |
758 | for success, -1 for timeout, -2 for error. */ | |
759 | ||
760 | static int | |
fba45db2 | 761 | mips_receive_trailer (unsigned char *trlr, int *pgarbage, int *pch, int timeout) |
c906108c SS |
762 | { |
763 | int i; | |
764 | int ch; | |
765 | ||
766 | for (i = 0; i < TRLR_LENGTH; i++) | |
767 | { | |
768 | ch = mips_readchar (timeout); | |
769 | *pch = ch; | |
770 | if (ch == SERIAL_TIMEOUT) | |
771 | return -1; | |
c5aa993b | 772 | if (!TRLR_CHECK (ch)) |
c906108c SS |
773 | return -2; |
774 | trlr[i] = ch; | |
775 | } | |
776 | return 0; | |
777 | } | |
778 | ||
779 | /* Get the checksum of a packet. HDR points to the packet header. | |
780 | DATA points to the packet data. LEN is the length of DATA. */ | |
781 | ||
782 | static int | |
fba45db2 | 783 | mips_cksum (const unsigned char *hdr, const unsigned char *data, int len) |
c906108c | 784 | { |
52f0bd74 AC |
785 | const unsigned char *p; |
786 | int c; | |
787 | int cksum; | |
c906108c SS |
788 | |
789 | cksum = 0; | |
790 | ||
791 | /* The initial SYN is not included in the checksum. */ | |
792 | c = HDR_LENGTH - 1; | |
793 | p = hdr + 1; | |
794 | while (c-- != 0) | |
795 | cksum += *p++; | |
c5aa993b | 796 | |
c906108c SS |
797 | c = len; |
798 | p = data; | |
799 | while (c-- != 0) | |
800 | cksum += *p++; | |
801 | ||
802 | return cksum; | |
803 | } | |
804 | ||
805 | /* Send a packet containing the given ASCII string. */ | |
806 | ||
807 | static void | |
fba45db2 | 808 | mips_send_packet (const char *s, int get_ack) |
c906108c SS |
809 | { |
810 | /* unsigned */ int len; | |
811 | unsigned char *packet; | |
52f0bd74 | 812 | int cksum; |
c906108c SS |
813 | int try; |
814 | ||
815 | len = strlen (s); | |
816 | if (len > DATA_MAXLEN) | |
817 | mips_error ("MIPS protocol data packet too long: %s", s); | |
818 | ||
819 | packet = (unsigned char *) alloca (HDR_LENGTH + len + TRLR_LENGTH + 1); | |
820 | ||
821 | packet[HDR_INDX_SYN] = HDR_SET_SYN (1, len, mips_send_seq); | |
822 | packet[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (1, len, mips_send_seq); | |
823 | packet[HDR_INDX_LEN1] = HDR_SET_LEN1 (1, len, mips_send_seq); | |
824 | packet[HDR_INDX_SEQ] = HDR_SET_SEQ (1, len, mips_send_seq); | |
825 | ||
826 | memcpy (packet + HDR_LENGTH, s, len); | |
827 | ||
828 | cksum = mips_cksum (packet, packet + HDR_LENGTH, len); | |
829 | packet[HDR_LENGTH + len + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum); | |
830 | packet[HDR_LENGTH + len + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum); | |
831 | packet[HDR_LENGTH + len + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum); | |
832 | ||
833 | /* Increment the sequence number. This will set mips_send_seq to | |
834 | the sequence number we expect in the acknowledgement. */ | |
835 | mips_send_seq = (mips_send_seq + 1) % SEQ_MODULOS; | |
836 | ||
837 | /* We can only have one outstanding data packet, so we just wait for | |
838 | the acknowledgement here. Keep retransmitting the packet until | |
839 | we get one, or until we've tried too many times. */ | |
840 | for (try = 0; try < mips_send_retries; try++) | |
841 | { | |
842 | int garbage; | |
843 | int ch; | |
844 | ||
845 | if (remote_debug > 0) | |
846 | { | |
847 | /* Don't use _filtered; we can't deal with a QUIT out of | |
848 | target_wait, and I think this might be called from there. */ | |
849 | packet[HDR_LENGTH + len + TRLR_LENGTH] = '\0'; | |
9846de1b | 850 | fprintf_unfiltered (gdb_stdlog, "Writing \"%s\"\n", packet + 1); |
c906108c SS |
851 | } |
852 | ||
2cd58942 | 853 | if (serial_write (mips_desc, packet, |
c906108c SS |
854 | HDR_LENGTH + len + TRLR_LENGTH) != 0) |
855 | mips_error ("write to target failed: %s", safe_strerror (errno)); | |
856 | ||
c5aa993b | 857 | if (!get_ack) |
c906108c SS |
858 | return; |
859 | ||
860 | garbage = 0; | |
861 | ch = 0; | |
862 | while (1) | |
863 | { | |
864 | unsigned char hdr[HDR_LENGTH + 1]; | |
865 | unsigned char trlr[TRLR_LENGTH + 1]; | |
866 | int err; | |
867 | unsigned int seq; | |
868 | ||
869 | /* Get the packet header. If we time out, resend the data | |
870 | packet. */ | |
871 | err = mips_receive_header (hdr, &garbage, ch, mips_retransmit_wait); | |
872 | if (err != 0) | |
873 | break; | |
874 | ||
875 | ch = 0; | |
876 | ||
877 | /* If we get a data packet, assume it is a duplicate and | |
878 | ignore it. FIXME: If the acknowledgement is lost, this | |
879 | data packet may be the packet the remote sends after the | |
880 | acknowledgement. */ | |
c5aa993b JM |
881 | if (HDR_IS_DATA (hdr)) |
882 | { | |
883 | int i; | |
884 | ||
885 | /* Ignore any errors raised whilst attempting to ignore | |
886 | packet. */ | |
887 | ||
888 | len = HDR_GET_LEN (hdr); | |
889 | ||
890 | for (i = 0; i < len; i++) | |
891 | { | |
892 | int rch; | |
893 | ||
688991e6 | 894 | rch = mips_readchar (remote_timeout); |
c5aa993b JM |
895 | if (rch == SYN) |
896 | { | |
897 | ch = SYN; | |
898 | break; | |
899 | } | |
900 | if (rch == SERIAL_TIMEOUT) | |
901 | break; | |
902 | /* ignore the character */ | |
903 | } | |
904 | ||
905 | if (i == len) | |
688991e6 AC |
906 | (void) mips_receive_trailer (trlr, &garbage, &ch, |
907 | remote_timeout); | |
c5aa993b JM |
908 | |
909 | /* We don't bother checking the checksum, or providing an | |
910 | ACK to the packet. */ | |
911 | continue; | |
912 | } | |
c906108c SS |
913 | |
914 | /* If the length is not 0, this is a garbled packet. */ | |
915 | if (HDR_GET_LEN (hdr) != 0) | |
916 | continue; | |
917 | ||
918 | /* Get the packet trailer. */ | |
919 | err = mips_receive_trailer (trlr, &garbage, &ch, | |
920 | mips_retransmit_wait); | |
921 | ||
922 | /* If we timed out, resend the data packet. */ | |
923 | if (err == -1) | |
924 | break; | |
925 | ||
926 | /* If we got a bad character, reread the header. */ | |
927 | if (err != 0) | |
928 | continue; | |
929 | ||
930 | /* If the checksum does not match the trailer checksum, this | |
931 | is a bad packet; ignore it. */ | |
932 | if (mips_cksum (hdr, (unsigned char *) NULL, 0) | |
933 | != TRLR_GET_CKSUM (trlr)) | |
934 | continue; | |
935 | ||
936 | if (remote_debug > 0) | |
937 | { | |
938 | hdr[HDR_LENGTH] = '\0'; | |
939 | trlr[TRLR_LENGTH] = '\0'; | |
940 | /* Don't use _filtered; we can't deal with a QUIT out of | |
c5aa993b | 941 | target_wait, and I think this might be called from there. */ |
9846de1b JM |
942 | fprintf_unfiltered (gdb_stdlog, "Got ack %d \"%s%s\"\n", |
943 | HDR_GET_SEQ (hdr), hdr + 1, trlr); | |
c906108c SS |
944 | } |
945 | ||
946 | /* If this ack is for the current packet, we're done. */ | |
947 | seq = HDR_GET_SEQ (hdr); | |
948 | if (seq == mips_send_seq) | |
949 | return; | |
950 | ||
951 | /* If this ack is for the last packet, resend the current | |
952 | packet. */ | |
953 | if ((seq + 1) % SEQ_MODULOS == mips_send_seq) | |
954 | break; | |
955 | ||
956 | /* Otherwise this is a bad ack; ignore it. Increment the | |
957 | garbage count to ensure that we do not stay in this loop | |
958 | forever. */ | |
959 | ++garbage; | |
960 | } | |
961 | } | |
962 | ||
963 | mips_error ("Remote did not acknowledge packet"); | |
964 | } | |
965 | ||
966 | /* Receive and acknowledge a packet, returning the data in BUFF (which | |
967 | should be DATA_MAXLEN + 1 bytes). The protocol documentation | |
968 | implies that only the sender retransmits packets, so this code just | |
969 | waits silently for a packet. It returns the length of the received | |
970 | packet. If THROW_ERROR is nonzero, call error() on errors. If not, | |
971 | don't print an error message and return -1. */ | |
972 | ||
973 | static int | |
fba45db2 | 974 | mips_receive_packet (char *buff, int throw_error, int timeout) |
c906108c SS |
975 | { |
976 | int ch; | |
977 | int garbage; | |
978 | int len; | |
979 | unsigned char ack[HDR_LENGTH + TRLR_LENGTH + 1]; | |
980 | int cksum; | |
981 | ||
982 | ch = 0; | |
983 | garbage = 0; | |
984 | while (1) | |
985 | { | |
986 | unsigned char hdr[HDR_LENGTH]; | |
987 | unsigned char trlr[TRLR_LENGTH]; | |
988 | int i; | |
989 | int err; | |
990 | ||
991 | if (mips_receive_header (hdr, &garbage, ch, timeout) != 0) | |
992 | { | |
993 | if (throw_error) | |
994 | mips_error ("Timed out waiting for remote packet"); | |
995 | else | |
996 | return -1; | |
997 | } | |
998 | ||
999 | ch = 0; | |
1000 | ||
1001 | /* An acknowledgement is probably a duplicate; ignore it. */ | |
c5aa993b | 1002 | if (!HDR_IS_DATA (hdr)) |
c906108c | 1003 | { |
c5aa993b JM |
1004 | len = HDR_GET_LEN (hdr); |
1005 | /* Check if the length is valid for an ACK, we may aswell | |
1006 | try and read the remainder of the packet: */ | |
1007 | if (len == 0) | |
1008 | { | |
1009 | /* Ignore the error condition, since we are going to | |
1010 | ignore the packet anyway. */ | |
1011 | (void) mips_receive_trailer (trlr, &garbage, &ch, timeout); | |
1012 | } | |
c906108c SS |
1013 | /* Don't use _filtered; we can't deal with a QUIT out of |
1014 | target_wait, and I think this might be called from there. */ | |
1015 | if (remote_debug > 0) | |
9846de1b | 1016 | fprintf_unfiltered (gdb_stdlog, "Ignoring unexpected ACK\n"); |
c906108c SS |
1017 | continue; |
1018 | } | |
1019 | ||
1020 | len = HDR_GET_LEN (hdr); | |
1021 | for (i = 0; i < len; i++) | |
1022 | { | |
1023 | int rch; | |
1024 | ||
1025 | rch = mips_readchar (timeout); | |
1026 | if (rch == SYN) | |
1027 | { | |
1028 | ch = SYN; | |
1029 | break; | |
1030 | } | |
1031 | if (rch == SERIAL_TIMEOUT) | |
1032 | { | |
1033 | if (throw_error) | |
1034 | mips_error ("Timed out waiting for remote packet"); | |
1035 | else | |
1036 | return -1; | |
1037 | } | |
1038 | buff[i] = rch; | |
1039 | } | |
1040 | ||
1041 | if (i < len) | |
1042 | { | |
1043 | /* Don't use _filtered; we can't deal with a QUIT out of | |
1044 | target_wait, and I think this might be called from there. */ | |
1045 | if (remote_debug > 0) | |
9846de1b JM |
1046 | fprintf_unfiltered (gdb_stdlog, |
1047 | "Got new SYN after %d chars (wanted %d)\n", | |
1048 | i, len); | |
c906108c SS |
1049 | continue; |
1050 | } | |
1051 | ||
1052 | err = mips_receive_trailer (trlr, &garbage, &ch, timeout); | |
1053 | if (err == -1) | |
1054 | { | |
1055 | if (throw_error) | |
1056 | mips_error ("Timed out waiting for packet"); | |
1057 | else | |
1058 | return -1; | |
1059 | } | |
1060 | if (err == -2) | |
1061 | { | |
1062 | /* Don't use _filtered; we can't deal with a QUIT out of | |
1063 | target_wait, and I think this might be called from there. */ | |
1064 | if (remote_debug > 0) | |
9846de1b | 1065 | fprintf_unfiltered (gdb_stdlog, "Got SYN when wanted trailer\n"); |
c906108c SS |
1066 | continue; |
1067 | } | |
1068 | ||
1069 | /* If this is the wrong sequence number, ignore it. */ | |
1070 | if (HDR_GET_SEQ (hdr) != mips_receive_seq) | |
1071 | { | |
1072 | /* Don't use _filtered; we can't deal with a QUIT out of | |
1073 | target_wait, and I think this might be called from there. */ | |
1074 | if (remote_debug > 0) | |
9846de1b | 1075 | fprintf_unfiltered (gdb_stdlog, |
c5aa993b JM |
1076 | "Ignoring sequence number %d (want %d)\n", |
1077 | HDR_GET_SEQ (hdr), mips_receive_seq); | |
c906108c SS |
1078 | continue; |
1079 | } | |
1080 | ||
1081 | if (mips_cksum (hdr, buff, len) == TRLR_GET_CKSUM (trlr)) | |
c5aa993b | 1082 | break; |
c906108c SS |
1083 | |
1084 | if (remote_debug > 0) | |
1085 | /* Don't use _filtered; we can't deal with a QUIT out of | |
1086 | target_wait, and I think this might be called from there. */ | |
1087 | printf_unfiltered ("Bad checksum; data %d, trailer %d\n", | |
c5aa993b JM |
1088 | mips_cksum (hdr, buff, len), |
1089 | TRLR_GET_CKSUM (trlr)); | |
c906108c SS |
1090 | |
1091 | /* The checksum failed. Send an acknowledgement for the | |
c5aa993b | 1092 | previous packet to tell the remote to resend the packet. */ |
c906108c SS |
1093 | ack[HDR_INDX_SYN] = HDR_SET_SYN (0, 0, mips_receive_seq); |
1094 | ack[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq); | |
1095 | ack[HDR_INDX_LEN1] = HDR_SET_LEN1 (0, 0, mips_receive_seq); | |
1096 | ack[HDR_INDX_SEQ] = HDR_SET_SEQ (0, 0, mips_receive_seq); | |
1097 | ||
1098 | cksum = mips_cksum (ack, (unsigned char *) NULL, 0); | |
1099 | ||
1100 | ack[HDR_LENGTH + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum); | |
1101 | ack[HDR_LENGTH + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum); | |
1102 | ack[HDR_LENGTH + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum); | |
1103 | ||
1104 | if (remote_debug > 0) | |
1105 | { | |
1106 | ack[HDR_LENGTH + TRLR_LENGTH] = '\0'; | |
1107 | /* Don't use _filtered; we can't deal with a QUIT out of | |
1108 | target_wait, and I think this might be called from there. */ | |
1109 | printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq, | |
c5aa993b | 1110 | ack + 1); |
c906108c SS |
1111 | } |
1112 | ||
2cd58942 | 1113 | if (serial_write (mips_desc, ack, HDR_LENGTH + TRLR_LENGTH) != 0) |
c906108c SS |
1114 | { |
1115 | if (throw_error) | |
1116 | mips_error ("write to target failed: %s", safe_strerror (errno)); | |
1117 | else | |
1118 | return -1; | |
1119 | } | |
1120 | } | |
1121 | ||
1122 | if (remote_debug > 0) | |
1123 | { | |
1124 | buff[len] = '\0'; | |
1125 | /* Don't use _filtered; we can't deal with a QUIT out of | |
c5aa993b | 1126 | target_wait, and I think this might be called from there. */ |
c906108c SS |
1127 | printf_unfiltered ("Got packet \"%s\"\n", buff); |
1128 | } | |
1129 | ||
1130 | /* We got the packet. Send an acknowledgement. */ | |
1131 | mips_receive_seq = (mips_receive_seq + 1) % SEQ_MODULOS; | |
1132 | ||
1133 | ack[HDR_INDX_SYN] = HDR_SET_SYN (0, 0, mips_receive_seq); | |
1134 | ack[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq); | |
1135 | ack[HDR_INDX_LEN1] = HDR_SET_LEN1 (0, 0, mips_receive_seq); | |
1136 | ack[HDR_INDX_SEQ] = HDR_SET_SEQ (0, 0, mips_receive_seq); | |
1137 | ||
1138 | cksum = mips_cksum (ack, (unsigned char *) NULL, 0); | |
1139 | ||
1140 | ack[HDR_LENGTH + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum); | |
1141 | ack[HDR_LENGTH + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum); | |
1142 | ack[HDR_LENGTH + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum); | |
1143 | ||
1144 | if (remote_debug > 0) | |
1145 | { | |
1146 | ack[HDR_LENGTH + TRLR_LENGTH] = '\0'; | |
1147 | /* Don't use _filtered; we can't deal with a QUIT out of | |
c5aa993b | 1148 | target_wait, and I think this might be called from there. */ |
c906108c | 1149 | printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq, |
c5aa993b | 1150 | ack + 1); |
c906108c SS |
1151 | } |
1152 | ||
2cd58942 | 1153 | if (serial_write (mips_desc, ack, HDR_LENGTH + TRLR_LENGTH) != 0) |
c906108c SS |
1154 | { |
1155 | if (throw_error) | |
1156 | mips_error ("write to target failed: %s", safe_strerror (errno)); | |
1157 | else | |
1158 | return -1; | |
1159 | } | |
1160 | ||
1161 | return len; | |
1162 | } | |
1163 | \f | |
1164 | /* Optionally send a request to the remote system and optionally wait | |
1165 | for the reply. This implements the remote debugging protocol, | |
1166 | which is built on top of the packet protocol defined above. Each | |
1167 | request has an ADDR argument and a DATA argument. The following | |
1168 | requests are defined: | |
1169 | ||
c5aa993b JM |
1170 | \0 don't send a request; just wait for a reply |
1171 | i read word from instruction space at ADDR | |
1172 | d read word from data space at ADDR | |
1173 | I write DATA to instruction space at ADDR | |
1174 | D write DATA to data space at ADDR | |
1175 | r read register number ADDR | |
1176 | R set register number ADDR to value DATA | |
1177 | c continue execution (if ADDR != 1, set pc to ADDR) | |
1178 | s single step (if ADDR != 1, set pc to ADDR) | |
c906108c SS |
1179 | |
1180 | The read requests return the value requested. The write requests | |
1181 | return the previous value in the changed location. The execution | |
1182 | requests return a UNIX wait value (the approximate signal which | |
1183 | caused execution to stop is in the upper eight bits). | |
1184 | ||
1185 | If PERR is not NULL, this function waits for a reply. If an error | |
1186 | occurs, it sets *PERR to 1 and sets errno according to what the | |
1187 | target board reports. */ | |
1188 | ||
4014092b AC |
1189 | static ULONGEST |
1190 | mips_request (int cmd, | |
1191 | ULONGEST addr, | |
1192 | ULONGEST data, | |
1193 | int *perr, | |
1194 | int timeout, | |
1195 | char *buff) | |
c906108c | 1196 | { |
5af949e3 | 1197 | int addr_size = gdbarch_addr_bit (target_gdbarch) / 8; |
c906108c SS |
1198 | char myBuff[DATA_MAXLEN + 1]; |
1199 | int len; | |
1200 | int rpid; | |
1201 | char rcmd; | |
1202 | int rerrflg; | |
1203 | unsigned long rresponse; | |
1204 | ||
1205 | if (buff == (char *) NULL) | |
1206 | buff = myBuff; | |
1207 | ||
1208 | if (cmd != '\0') | |
1209 | { | |
1210 | if (mips_need_reply) | |
8e65ff28 | 1211 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 1212 | _("mips_request: Trying to send command before reply")); |
5af949e3 UW |
1213 | sprintf (buff, "0x0 %c 0x%s 0x%s", cmd, |
1214 | phex_nz (addr, addr_size), phex_nz (data, addr_size)); | |
c906108c SS |
1215 | mips_send_packet (buff, 1); |
1216 | mips_need_reply = 1; | |
1217 | } | |
1218 | ||
1219 | if (perr == (int *) NULL) | |
1220 | return 0; | |
1221 | ||
c5aa993b | 1222 | if (!mips_need_reply) |
8e65ff28 | 1223 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 1224 | _("mips_request: Trying to get reply before command")); |
c906108c SS |
1225 | |
1226 | mips_need_reply = 0; | |
1227 | ||
1228 | len = mips_receive_packet (buff, 1, timeout); | |
1229 | buff[len] = '\0'; | |
1230 | ||
1231 | if (sscanf (buff, "0x%x %c 0x%x 0x%lx", | |
1232 | &rpid, &rcmd, &rerrflg, &rresponse) != 4 | |
1233 | || (cmd != '\0' && rcmd != cmd)) | |
1234 | mips_error ("Bad response from remote board"); | |
1235 | ||
1236 | if (rerrflg != 0) | |
1237 | { | |
1238 | *perr = 1; | |
1239 | ||
1240 | /* FIXME: This will returns MIPS errno numbers, which may or may | |
c5aa993b JM |
1241 | not be the same as errno values used on other systems. If |
1242 | they stick to common errno values, they will be the same, but | |
1243 | if they don't, they must be translated. */ | |
c906108c SS |
1244 | errno = rresponse; |
1245 | ||
1246 | return 0; | |
1247 | } | |
1248 | ||
1249 | *perr = 0; | |
1250 | return rresponse; | |
1251 | } | |
1252 | ||
1253 | static void | |
4efb68b1 | 1254 | mips_initialize_cleanups (void *arg) |
c906108c SS |
1255 | { |
1256 | mips_initializing = 0; | |
1257 | } | |
1258 | ||
1259 | static void | |
4efb68b1 | 1260 | mips_exit_cleanups (void *arg) |
c906108c SS |
1261 | { |
1262 | mips_exiting = 0; | |
1263 | } | |
1264 | ||
1265 | static void | |
fba45db2 | 1266 | mips_send_command (const char *cmd, int prompt) |
c906108c | 1267 | { |
2cd58942 | 1268 | serial_write (mips_desc, cmd, strlen (cmd)); |
c906108c SS |
1269 | mips_expect (cmd); |
1270 | mips_expect ("\n"); | |
1271 | if (prompt) | |
1272 | mips_expect (mips_monitor_prompt); | |
1273 | } | |
1274 | ||
1275 | /* Enter remote (dbx) debug mode: */ | |
1276 | static void | |
fba45db2 | 1277 | mips_enter_debug (void) |
c906108c SS |
1278 | { |
1279 | /* Reset the sequence numbers, ready for the new debug sequence: */ | |
1280 | mips_send_seq = 0; | |
1281 | mips_receive_seq = 0; | |
1282 | ||
1283 | if (mips_monitor != MON_IDT) | |
1284 | mips_send_command ("debug\r", 0); | |
c5aa993b | 1285 | else /* assume IDT monitor by default */ |
c906108c SS |
1286 | mips_send_command ("db tty0\r", 0); |
1287 | ||
c5aa993b | 1288 | sleep (1); |
2cd58942 | 1289 | serial_write (mips_desc, "\r", sizeof "\r" - 1); |
c906108c SS |
1290 | |
1291 | /* We don't need to absorb any spurious characters here, since the | |
1292 | mips_receive_header will eat up a reasonable number of characters | |
1293 | whilst looking for the SYN, however this avoids the "garbage" | |
1294 | being displayed to the user. */ | |
1295 | if (mips_monitor != MON_IDT) | |
1296 | mips_expect ("\r"); | |
c5aa993b | 1297 | |
c906108c SS |
1298 | { |
1299 | char buff[DATA_MAXLEN + 1]; | |
1300 | if (mips_receive_packet (buff, 1, 3) < 0) | |
1301 | mips_error ("Failed to initialize (didn't receive packet)."); | |
1302 | } | |
1303 | } | |
1304 | ||
1305 | /* Exit remote (dbx) debug mode, returning to the monitor prompt: */ | |
1306 | static int | |
fba45db2 | 1307 | mips_exit_debug (void) |
c906108c SS |
1308 | { |
1309 | int err; | |
1310 | struct cleanup *old_cleanups = make_cleanup (mips_exit_cleanups, NULL); | |
1311 | ||
1312 | mips_exiting = 1; | |
1313 | ||
1314 | if (mips_monitor != MON_IDT) | |
1315 | { | |
1316 | /* The DDB (NEC) and MiniRISC (LSI) versions of PMON exit immediately, | |
1317 | so we do not get a reply to this command: */ | |
4014092b | 1318 | mips_request ('x', 0, 0, NULL, mips_receive_wait, NULL); |
c906108c SS |
1319 | mips_need_reply = 0; |
1320 | if (!mips_expect (" break!")) | |
c5aa993b | 1321 | return -1; |
c906108c SS |
1322 | } |
1323 | else | |
4014092b | 1324 | mips_request ('x', 0, 0, &err, mips_receive_wait, NULL); |
c906108c SS |
1325 | |
1326 | if (!mips_expect (mips_monitor_prompt)) | |
1327 | return -1; | |
1328 | ||
1329 | do_cleanups (old_cleanups); | |
1330 | ||
1331 | return 0; | |
1332 | } | |
1333 | ||
1334 | /* Initialize a new connection to the MIPS board, and make sure we are | |
1335 | really connected. */ | |
1336 | ||
1337 | static void | |
fba45db2 | 1338 | mips_initialize (void) |
c906108c SS |
1339 | { |
1340 | int err; | |
1341 | struct cleanup *old_cleanups = make_cleanup (mips_initialize_cleanups, NULL); | |
1342 | int j; | |
1343 | ||
1344 | /* What is this code doing here? I don't see any way it can happen, and | |
1345 | it might mean mips_initializing didn't get cleared properly. | |
1346 | So I'll make it a warning. */ | |
1347 | ||
1348 | if (mips_initializing) | |
1349 | { | |
1350 | warning ("internal error: mips_initialize called twice"); | |
1351 | return; | |
1352 | } | |
1353 | ||
1354 | mips_wait_flag = 0; | |
1355 | mips_initializing = 1; | |
1356 | ||
1357 | /* At this point, the packit protocol isn't responding. We'll try getting | |
1358 | into the monitor, and restarting the protocol. */ | |
1359 | ||
1360 | /* Force the system into the monitor. After this we *should* be at | |
1361 | the mips_monitor_prompt. */ | |
1362 | if (mips_monitor != MON_IDT) | |
c5aa993b | 1363 | j = 0; /* start by checking if we are already at the prompt */ |
c906108c | 1364 | else |
c5aa993b | 1365 | j = 1; /* start by sending a break */ |
c906108c SS |
1366 | for (; j <= 4; j++) |
1367 | { | |
1368 | switch (j) | |
1369 | { | |
c5aa993b | 1370 | case 0: /* First, try sending a CR */ |
2cd58942 AC |
1371 | serial_flush_input (mips_desc); |
1372 | serial_write (mips_desc, "\r", 1); | |
c5aa993b JM |
1373 | break; |
1374 | case 1: /* First, try sending a break */ | |
2cd58942 | 1375 | serial_send_break (mips_desc); |
c906108c | 1376 | break; |
c5aa993b | 1377 | case 2: /* Then, try a ^C */ |
2cd58942 | 1378 | serial_write (mips_desc, "\003", 1); |
c906108c | 1379 | break; |
c5aa993b | 1380 | case 3: /* Then, try escaping from download */ |
c906108c | 1381 | { |
c5aa993b JM |
1382 | if (mips_monitor != MON_IDT) |
1383 | { | |
1384 | char tbuff[7]; | |
1385 | ||
1386 | /* We shouldn't need to send multiple termination | |
1387 | sequences, since the target performs line (or | |
1388 | block) reads, and then processes those | |
1389 | packets. In-case we were downloading a large packet | |
1390 | we flush the output buffer before inserting a | |
1391 | termination sequence. */ | |
2cd58942 | 1392 | serial_flush_output (mips_desc); |
c5aa993b | 1393 | sprintf (tbuff, "\r/E/E\r"); |
2cd58942 | 1394 | serial_write (mips_desc, tbuff, 6); |
c5aa993b JM |
1395 | } |
1396 | else | |
1397 | { | |
1398 | char srec[10]; | |
1399 | int i; | |
1400 | ||
1401 | /* We are possibly in binary download mode, having | |
1402 | aborted in the middle of an S-record. ^C won't | |
1403 | work because of binary mode. The only reliable way | |
1404 | out is to send enough termination packets (8 bytes) | |
1405 | to fill up and then overflow the largest size | |
1406 | S-record (255 bytes in this case). This amounts to | |
1407 | 256/8 + 1 packets. | |
1408 | */ | |
1409 | ||
1410 | mips_make_srec (srec, '7', 0, NULL, 0); | |
1411 | ||
1412 | for (i = 1; i <= 33; i++) | |
1413 | { | |
2cd58942 | 1414 | serial_write (mips_desc, srec, 8); |
c5aa993b | 1415 | |
2cd58942 | 1416 | if (serial_readchar (mips_desc, 0) >= 0) |
c5aa993b | 1417 | break; /* Break immediatly if we get something from |
c906108c | 1418 | the board. */ |
c5aa993b JM |
1419 | } |
1420 | } | |
1421 | } | |
c906108c SS |
1422 | break; |
1423 | case 4: | |
1424 | mips_error ("Failed to initialize."); | |
1425 | } | |
1426 | ||
1427 | if (mips_expect (mips_monitor_prompt)) | |
1428 | break; | |
1429 | } | |
1430 | ||
1431 | if (mips_monitor != MON_IDT) | |
1432 | { | |
1433 | /* Sometimes PMON ignores the first few characters in the first | |
1434 | command sent after a load. Sending a blank command gets | |
c5aa993b | 1435 | around that. */ |
c906108c SS |
1436 | mips_send_command ("\r", -1); |
1437 | ||
1438 | /* Ensure the correct target state: */ | |
1439 | if (mips_monitor != MON_LSI) | |
1440 | mips_send_command ("set regsize 64\r", -1); | |
1441 | mips_send_command ("set hostport tty0\r", -1); | |
1442 | mips_send_command ("set brkcmd \"\"\r", -1); | |
1443 | /* Delete all the current breakpoints: */ | |
1444 | mips_send_command ("db *\r", -1); | |
1445 | /* NOTE: PMON does not have breakpoint support through the | |
1446 | "debug" mode, only at the monitor command-line. */ | |
1447 | } | |
1448 | ||
1449 | mips_enter_debug (); | |
1450 | ||
1451 | /* Clear all breakpoints: */ | |
1452 | if ((mips_monitor == MON_IDT | |
06b1d59c | 1453 | && mips_clear_breakpoint (-1, 0, BREAK_UNUSED) == 0) |
c906108c SS |
1454 | || mips_monitor == MON_LSI) |
1455 | monitor_supports_breakpoints = 1; | |
1456 | else | |
1457 | monitor_supports_breakpoints = 0; | |
1458 | ||
1459 | do_cleanups (old_cleanups); | |
1460 | ||
1461 | /* If this doesn't call error, we have connected; we don't care if | |
1462 | the request itself succeeds or fails. */ | |
1463 | ||
4014092b | 1464 | mips_request ('r', 0, 0, &err, mips_receive_wait, NULL); |
c906108c SS |
1465 | } |
1466 | ||
1467 | /* Open a connection to the remote board. */ | |
1468 | static void | |
fba45db2 | 1469 | common_open (struct target_ops *ops, char *name, int from_tty, |
98691afe AC |
1470 | enum mips_monitor_type new_monitor, |
1471 | const char *new_monitor_prompt) | |
c906108c SS |
1472 | { |
1473 | char *ptype; | |
1474 | char *serial_port_name; | |
1475 | char *remote_name = 0; | |
1476 | char *local_name = 0; | |
1477 | char **argv; | |
1478 | ||
1479 | if (name == 0) | |
1480 | error ( | |
c5aa993b | 1481 | "To open a MIPS remote debugging connection, you need to specify what serial\n\ |
c906108c | 1482 | device is attached to the target board (e.g., /dev/ttya).\n" |
c5aa993b JM |
1483 | "If you want to use TFTP to download to the board, specify the name of a\n" |
1484 | "temporary file to be used by GDB for downloads as the second argument.\n" | |
1485 | "This filename must be in the form host:filename, where host is the name\n" | |
1486 | "of the host running the TFTP server, and the file must be readable by the\n" | |
1487 | "world. If the local name of the temporary file differs from the name as\n" | |
1488 | "seen from the board via TFTP, specify that name as the third parameter.\n"); | |
c906108c SS |
1489 | |
1490 | /* Parse the serial port name, the optional TFTP name, and the | |
1491 | optional local TFTP name. */ | |
d1a41061 | 1492 | argv = gdb_buildargv (name); |
7a292a7a | 1493 | make_cleanup_freeargv (argv); |
c906108c | 1494 | |
4fcf66da | 1495 | serial_port_name = xstrdup (argv[0]); |
c5aa993b | 1496 | if (argv[1]) /* remote TFTP name specified? */ |
c906108c SS |
1497 | { |
1498 | remote_name = argv[1]; | |
c5aa993b | 1499 | if (argv[2]) /* local TFTP filename specified? */ |
c906108c SS |
1500 | local_name = argv[2]; |
1501 | } | |
1502 | ||
1503 | target_preopen (from_tty); | |
1504 | ||
1505 | if (mips_is_open) | |
1506 | unpush_target (current_ops); | |
1507 | ||
1508 | /* Open and initialize the serial port. */ | |
2cd58942 | 1509 | mips_desc = serial_open (serial_port_name); |
819cc324 | 1510 | if (mips_desc == NULL) |
c906108c SS |
1511 | perror_with_name (serial_port_name); |
1512 | ||
1513 | if (baud_rate != -1) | |
1514 | { | |
2cd58942 | 1515 | if (serial_setbaudrate (mips_desc, baud_rate)) |
c5aa993b | 1516 | { |
2cd58942 | 1517 | serial_close (mips_desc); |
c5aa993b JM |
1518 | perror_with_name (serial_port_name); |
1519 | } | |
c906108c SS |
1520 | } |
1521 | ||
2cd58942 | 1522 | serial_raw (mips_desc); |
c906108c SS |
1523 | |
1524 | /* Open and initialize the optional download port. If it is in the form | |
1525 | hostname#portnumber, it's a UDP socket. If it is in the form | |
1526 | hostname:filename, assume it's the TFTP filename that must be | |
1527 | passed to the DDB board to tell it where to get the load file. */ | |
1528 | if (remote_name) | |
1529 | { | |
1530 | if (strchr (remote_name, '#')) | |
1531 | { | |
2cd58942 | 1532 | udp_desc = serial_open (remote_name); |
c906108c SS |
1533 | if (!udp_desc) |
1534 | perror_with_name ("Unable to open UDP port"); | |
1535 | udp_in_use = 1; | |
1536 | } | |
1537 | else | |
1538 | { | |
1539 | /* Save the remote and local names of the TFTP temp file. If | |
1540 | the user didn't specify a local name, assume it's the same | |
1541 | as the part of the remote name after the "host:". */ | |
1542 | if (tftp_name) | |
b8c9b27d | 1543 | xfree (tftp_name); |
c906108c | 1544 | if (tftp_localname) |
b8c9b27d | 1545 | xfree (tftp_localname); |
c906108c | 1546 | if (local_name == NULL) |
c5aa993b JM |
1547 | if ((local_name = strchr (remote_name, ':')) != NULL) |
1548 | local_name++; /* skip over the colon */ | |
c906108c SS |
1549 | if (local_name == NULL) |
1550 | local_name = remote_name; /* local name same as remote name */ | |
4fcf66da AC |
1551 | tftp_name = xstrdup (remote_name); |
1552 | tftp_localname = xstrdup (local_name); | |
c906108c SS |
1553 | tftp_in_use = 1; |
1554 | } | |
1555 | } | |
1556 | ||
1557 | current_ops = ops; | |
1558 | mips_is_open = 1; | |
1559 | ||
1560 | /* Reset the expected monitor prompt if it's never been set before. */ | |
1561 | if (mips_monitor_prompt == NULL) | |
4fcf66da | 1562 | mips_monitor_prompt = xstrdup (new_monitor_prompt); |
c906108c SS |
1563 | mips_monitor = new_monitor; |
1564 | ||
1565 | mips_initialize (); | |
1566 | ||
1567 | if (from_tty) | |
1568 | printf_unfiltered ("Remote MIPS debugging using %s\n", serial_port_name); | |
1569 | ||
1570 | /* Switch to using remote target now. */ | |
1571 | push_target (ops); | |
1572 | ||
8eeafb51 KB |
1573 | inferior_ptid = remote_mips_ptid; |
1574 | inferior_appeared (current_inferior (), ptid_get_pid (inferior_ptid)); | |
1575 | add_thread_silent (inferior_ptid); | |
c906108c SS |
1576 | |
1577 | /* Try to figure out the processor model if possible. */ | |
691c0433 | 1578 | deprecated_mips_set_processor_regs_hack (); |
c906108c | 1579 | |
a193e397 AC |
1580 | /* This is really the job of start_remote however, that makes an |
1581 | assumption that the target is about to print out a status message | |
1582 | of some sort. That doesn't happen here (in fact, it may not be | |
1583 | possible to get the monitor to send the appropriate packet). */ | |
c906108c | 1584 | |
35f196d9 | 1585 | reinit_frame_cache (); |
c906108c | 1586 | registers_changed (); |
fb14de7b | 1587 | stop_pc = regcache_read_pc (get_current_regcache ()); |
b04f3ab4 | 1588 | print_stack_frame (get_selected_frame (NULL), 0, SRC_AND_LOC); |
b8c9b27d | 1589 | xfree (serial_port_name); |
c906108c SS |
1590 | } |
1591 | ||
1592 | static void | |
fba45db2 | 1593 | mips_open (char *name, int from_tty) |
c906108c | 1594 | { |
ef31c1ea | 1595 | const char *monitor_prompt = NULL; |
1cf3db46 UW |
1596 | if (gdbarch_bfd_arch_info (target_gdbarch) != NULL |
1597 | && gdbarch_bfd_arch_info (target_gdbarch)->arch == bfd_arch_mips) | |
ef31c1ea | 1598 | { |
1cf3db46 | 1599 | switch (gdbarch_bfd_arch_info (target_gdbarch)->mach) |
ef31c1ea AC |
1600 | { |
1601 | case bfd_mach_mips4100: | |
1602 | case bfd_mach_mips4300: | |
1603 | case bfd_mach_mips4600: | |
1604 | case bfd_mach_mips4650: | |
1605 | case bfd_mach_mips5000: | |
1606 | monitor_prompt = "<RISQ> "; | |
1607 | break; | |
1608 | } | |
1609 | } | |
1610 | if (monitor_prompt == NULL) | |
1611 | monitor_prompt = "<IDT>"; | |
1612 | common_open (&mips_ops, name, from_tty, MON_IDT, monitor_prompt); | |
c906108c SS |
1613 | } |
1614 | ||
1615 | static void | |
fba45db2 | 1616 | pmon_open (char *name, int from_tty) |
c906108c SS |
1617 | { |
1618 | common_open (&pmon_ops, name, from_tty, MON_PMON, "PMON> "); | |
1619 | } | |
1620 | ||
1621 | static void | |
fba45db2 | 1622 | ddb_open (char *name, int from_tty) |
c906108c SS |
1623 | { |
1624 | common_open (&ddb_ops, name, from_tty, MON_DDB, "NEC010>"); | |
1625 | } | |
1626 | ||
1627 | static void | |
fba45db2 | 1628 | lsi_open (char *name, int from_tty) |
c906108c SS |
1629 | { |
1630 | int i; | |
1631 | ||
1632 | /* Clear the LSI breakpoint table. */ | |
1633 | for (i = 0; i < MAX_LSI_BREAKPOINTS; i++) | |
1634 | lsi_breakpoints[i].type = BREAK_UNUSED; | |
c5aa993b | 1635 | |
c906108c SS |
1636 | common_open (&lsi_ops, name, from_tty, MON_LSI, "PMON> "); |
1637 | } | |
1638 | ||
1639 | /* Close a connection to the remote board. */ | |
1640 | ||
1641 | static void | |
fba45db2 | 1642 | mips_close (int quitting) |
c906108c SS |
1643 | { |
1644 | if (mips_is_open) | |
1645 | { | |
1646 | /* Get the board out of remote debugging mode. */ | |
1647 | (void) mips_exit_debug (); | |
1648 | ||
1649 | close_ports (); | |
1650 | } | |
8eeafb51 KB |
1651 | |
1652 | generic_mourn_inferior (); | |
c906108c SS |
1653 | } |
1654 | ||
1655 | /* Detach from the remote board. */ | |
1656 | ||
1657 | static void | |
136d6dae | 1658 | mips_detach (struct target_ops *ops, char *args, int from_tty) |
c906108c SS |
1659 | { |
1660 | if (args) | |
1661 | error ("Argument given to \"detach\" when remotely debugging."); | |
1662 | ||
1663 | pop_target (); | |
1664 | ||
1665 | mips_close (1); | |
1666 | ||
1667 | if (from_tty) | |
1668 | printf_unfiltered ("Ending remote MIPS debugging.\n"); | |
1669 | } | |
1670 | ||
1671 | /* Tell the target board to resume. This does not wait for a reply | |
1672 | from the board, except in the case of single-stepping on LSI boards, | |
1673 | where PMON does return a reply. */ | |
1674 | ||
1675 | static void | |
28439f5e PA |
1676 | mips_resume (struct target_ops *ops, |
1677 | ptid_t ptid, int step, enum target_signal siggnal) | |
c906108c SS |
1678 | { |
1679 | int err; | |
1680 | ||
1681 | /* LSI PMON requires returns a reply packet "0x1 s 0x0 0x57f" after | |
1682 | a single step, so we wait for that. */ | |
4014092b | 1683 | mips_request (step ? 's' : 'c', 1, siggnal, |
c906108c SS |
1684 | mips_monitor == MON_LSI && step ? &err : (int *) NULL, |
1685 | mips_receive_wait, NULL); | |
1686 | } | |
1687 | ||
1688 | /* Return the signal corresponding to SIG, where SIG is the number which | |
1689 | the MIPS protocol uses for the signal. */ | |
a78f21af | 1690 | static enum target_signal |
fba45db2 | 1691 | mips_signal_from_protocol (int sig) |
c906108c SS |
1692 | { |
1693 | /* We allow a few more signals than the IDT board actually returns, on | |
1694 | the theory that there is at least *some* hope that perhaps the numbering | |
1695 | for these signals is widely agreed upon. */ | |
1696 | if (sig <= 0 | |
1697 | || sig > 31) | |
1698 | return TARGET_SIGNAL_UNKNOWN; | |
1699 | ||
1700 | /* Don't want to use target_signal_from_host because we are converting | |
1701 | from MIPS signal numbers, not host ones. Our internal numbers | |
1702 | match the MIPS numbers for the signals the board can return, which | |
1703 | are: SIGINT, SIGSEGV, SIGBUS, SIGILL, SIGFPE, SIGTRAP. */ | |
1704 | return (enum target_signal) sig; | |
1705 | } | |
1706 | ||
1707 | /* Wait until the remote stops, and return a wait status. */ | |
1708 | ||
39f77062 | 1709 | static ptid_t |
117de6a9 | 1710 | mips_wait (struct target_ops *ops, |
47608cb1 | 1711 | ptid_t ptid, struct target_waitstatus *status, int options) |
c906108c SS |
1712 | { |
1713 | int rstatus; | |
1714 | int err; | |
1715 | char buff[DATA_MAXLEN]; | |
1716 | int rpc, rfp, rsp; | |
1717 | char flags[20]; | |
1718 | int nfields; | |
1719 | int i; | |
1720 | ||
1721 | interrupt_count = 0; | |
1722 | hit_watchpoint = 0; | |
1723 | ||
1724 | /* If we have not sent a single step or continue command, then the | |
1725 | board is waiting for us to do something. Return a status | |
1726 | indicating that it is stopped. */ | |
c5aa993b | 1727 | if (!mips_need_reply) |
c906108c SS |
1728 | { |
1729 | status->kind = TARGET_WAITKIND_STOPPED; | |
1730 | status->value.sig = TARGET_SIGNAL_TRAP; | |
39f77062 | 1731 | return inferior_ptid; |
c906108c SS |
1732 | } |
1733 | ||
1734 | /* No timeout; we sit here as long as the program continues to execute. */ | |
1735 | mips_wait_flag = 1; | |
4014092b | 1736 | rstatus = mips_request ('\000', 0, 0, &err, -1, buff); |
c906108c SS |
1737 | mips_wait_flag = 0; |
1738 | if (err) | |
1739 | mips_error ("Remote failure: %s", safe_strerror (errno)); | |
1740 | ||
1741 | /* On returning from a continue, the PMON monitor seems to start | |
1742 | echoing back the messages we send prior to sending back the | |
1743 | ACK. The code can cope with this, but to try and avoid the | |
1744 | unnecessary serial traffic, and "spurious" characters displayed | |
1745 | to the user, we cheat and reset the debug protocol. The problems | |
1746 | seems to be caused by a check on the number of arguments, and the | |
1747 | command length, within the monitor causing it to echo the command | |
1748 | as a bad packet. */ | |
1749 | if (mips_monitor == MON_PMON) | |
1750 | { | |
1751 | mips_exit_debug (); | |
1752 | mips_enter_debug (); | |
1753 | } | |
1754 | ||
1755 | /* See if we got back extended status. If so, pick out the pc, fp, sp, etc... */ | |
1756 | ||
1757 | nfields = sscanf (buff, "0x%*x %*c 0x%*x 0x%*x 0x%x 0x%x 0x%x 0x%*x %s", | |
1758 | &rpc, &rfp, &rsp, flags); | |
1759 | if (nfields >= 3) | |
1760 | { | |
594f7785 | 1761 | struct regcache *regcache = get_current_regcache (); |
2eb4d78b | 1762 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
e17a4113 | 1763 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
123a958e | 1764 | char buf[MAX_REGISTER_SIZE]; |
c906108c | 1765 | |
e17a4113 UW |
1766 | store_unsigned_integer |
1767 | (buf, register_size (gdbarch, gdbarch_pc_regnum (gdbarch)), | |
1768 | byte_order, rpc); | |
2eb4d78b | 1769 | regcache_raw_supply (regcache, gdbarch_pc_regnum (gdbarch), buf); |
3e8c568d UW |
1770 | |
1771 | store_unsigned_integer | |
e17a4113 UW |
1772 | (buf, register_size (gdbarch, gdbarch_pc_regnum (gdbarch)), |
1773 | byte_order, rfp); | |
594f7785 | 1774 | regcache_raw_supply (regcache, 30, buf); /* This register they are avoiding and so it is unnamed */ |
c906108c | 1775 | |
e17a4113 UW |
1776 | store_unsigned_integer |
1777 | (buf, register_size (gdbarch, gdbarch_sp_regnum (gdbarch)), | |
1778 | byte_order, rsp); | |
2eb4d78b | 1779 | regcache_raw_supply (regcache, gdbarch_sp_regnum (gdbarch), buf); |
c906108c | 1780 | |
e17a4113 UW |
1781 | store_unsigned_integer |
1782 | (buf, register_size (gdbarch, gdbarch_deprecated_fp_regnum (gdbarch)), | |
1783 | byte_order, 0); | |
064f5156 | 1784 | regcache_raw_supply (regcache, |
2eb4d78b | 1785 | gdbarch_deprecated_fp_regnum (gdbarch), buf); |
c906108c SS |
1786 | |
1787 | if (nfields == 9) | |
1788 | { | |
1789 | int i; | |
1790 | ||
1791 | for (i = 0; i <= 2; i++) | |
1792 | if (flags[i] == 'r' || flags[i] == 'w') | |
1793 | hit_watchpoint = 1; | |
1794 | else if (flags[i] == '\000') | |
1795 | break; | |
1796 | } | |
1797 | } | |
1798 | ||
1799 | if (strcmp (target_shortname, "lsi") == 0) | |
1800 | { | |
1801 | #if 0 | |
1802 | /* If this is an LSI PMON target, see if we just hit a hardrdware watchpoint. | |
c5aa993b JM |
1803 | Right now, PMON doesn't give us enough information to determine which |
1804 | breakpoint we hit. So we have to look up the PC in our own table | |
1805 | of breakpoints, and if found, assume it's just a normal instruction | |
1806 | fetch breakpoint, not a data watchpoint. FIXME when PMON | |
1807 | provides some way to tell us what type of breakpoint it is. */ | |
c906108c | 1808 | int i; |
fb14de7b | 1809 | CORE_ADDR pc = regcache_read_pc (get_current_regcache ()); |
c906108c SS |
1810 | |
1811 | hit_watchpoint = 1; | |
1812 | for (i = 0; i < MAX_LSI_BREAKPOINTS; i++) | |
1813 | { | |
1814 | if (lsi_breakpoints[i].addr == pc | |
1815 | && lsi_breakpoints[i].type == BREAK_FETCH) | |
1816 | { | |
1817 | hit_watchpoint = 0; | |
1818 | break; | |
1819 | } | |
1820 | } | |
1821 | #else | |
1822 | /* If a data breakpoint was hit, PMON returns the following packet: | |
c5aa993b JM |
1823 | 0x1 c 0x0 0x57f 0x1 |
1824 | The return packet from an ordinary breakpoint doesn't have the | |
1825 | extra 0x01 field tacked onto the end. */ | |
c906108c SS |
1826 | if (nfields == 1 && rpc == 1) |
1827 | hit_watchpoint = 1; | |
1828 | #endif | |
1829 | } | |
1830 | ||
1831 | /* NOTE: The following (sig) numbers are defined by PMON: | |
c5aa993b JM |
1832 | SPP_SIGTRAP 5 breakpoint |
1833 | SPP_SIGINT 2 | |
1834 | SPP_SIGSEGV 11 | |
1835 | SPP_SIGBUS 10 | |
1836 | SPP_SIGILL 4 | |
1837 | SPP_SIGFPE 8 | |
1838 | SPP_SIGTERM 15 */ | |
c906108c SS |
1839 | |
1840 | /* Translate a MIPS waitstatus. We use constants here rather than WTERMSIG | |
1841 | and so on, because the constants we want here are determined by the | |
1842 | MIPS protocol and have nothing to do with what host we are running on. */ | |
1843 | if ((rstatus & 0xff) == 0) | |
1844 | { | |
1845 | status->kind = TARGET_WAITKIND_EXITED; | |
1846 | status->value.integer = (((rstatus) >> 8) & 0xff); | |
1847 | } | |
1848 | else if ((rstatus & 0xff) == 0x7f) | |
1849 | { | |
1850 | status->kind = TARGET_WAITKIND_STOPPED; | |
1851 | status->value.sig = mips_signal_from_protocol (((rstatus) >> 8) & 0xff); | |
1852 | ||
1853 | /* If the stop PC is in the _exit function, assume | |
1854 | we hit the 'break 0x3ff' instruction in _exit, so this | |
c5aa993b | 1855 | is not a normal breakpoint. */ |
c906108c SS |
1856 | if (strcmp (target_shortname, "lsi") == 0) |
1857 | { | |
1858 | char *func_name; | |
1859 | CORE_ADDR func_start; | |
fb14de7b | 1860 | CORE_ADDR pc = regcache_read_pc (get_current_regcache ()); |
c906108c SS |
1861 | |
1862 | find_pc_partial_function (pc, &func_name, &func_start, NULL); | |
1863 | if (func_name != NULL && strcmp (func_name, "_exit") == 0 | |
1864 | && func_start == pc) | |
1865 | status->kind = TARGET_WAITKIND_EXITED; | |
1866 | } | |
1867 | } | |
1868 | else | |
1869 | { | |
1870 | status->kind = TARGET_WAITKIND_SIGNALLED; | |
1871 | status->value.sig = mips_signal_from_protocol (rstatus & 0x7f); | |
1872 | } | |
1873 | ||
39f77062 | 1874 | return inferior_ptid; |
c906108c SS |
1875 | } |
1876 | ||
1877 | /* We have to map between the register numbers used by gdb and the | |
82e34d2f | 1878 | register numbers used by the debugging protocol. */ |
c906108c SS |
1879 | |
1880 | #define REGNO_OFFSET 96 | |
1881 | ||
1882 | static int | |
74ed0bb4 | 1883 | mips_map_regno (struct gdbarch *gdbarch, int regno) |
c906108c SS |
1884 | { |
1885 | if (regno < 32) | |
1886 | return regno; | |
74ed0bb4 MD |
1887 | if (regno >= mips_regnum (gdbarch)->fp0 |
1888 | && regno < mips_regnum (gdbarch)->fp0 + 32) | |
1889 | return regno - mips_regnum (gdbarch)->fp0 + 32; | |
1890 | else if (regno == mips_regnum (gdbarch)->pc) | |
56cea623 | 1891 | return REGNO_OFFSET + 0; |
74ed0bb4 | 1892 | else if (regno == mips_regnum (gdbarch)->cause) |
56cea623 | 1893 | return REGNO_OFFSET + 1; |
74ed0bb4 | 1894 | else if (regno == mips_regnum (gdbarch)->hi) |
56cea623 | 1895 | return REGNO_OFFSET + 2; |
74ed0bb4 | 1896 | else if (regno == mips_regnum (gdbarch)->lo) |
56cea623 | 1897 | return REGNO_OFFSET + 3; |
74ed0bb4 | 1898 | else if (regno == mips_regnum (gdbarch)->fp_control_status) |
56cea623 | 1899 | return REGNO_OFFSET + 4; |
74ed0bb4 | 1900 | else if (regno == mips_regnum (gdbarch)->fp_implementation_revision) |
56cea623 AC |
1901 | return REGNO_OFFSET + 5; |
1902 | else | |
1903 | /* FIXME: Is there a way to get the status register? */ | |
1904 | return 0; | |
c906108c SS |
1905 | } |
1906 | ||
1907 | /* Fetch the remote registers. */ | |
1908 | ||
1909 | static void | |
28439f5e PA |
1910 | mips_fetch_registers (struct target_ops *ops, |
1911 | struct regcache *regcache, int regno) | |
c906108c | 1912 | { |
2eb4d78b | 1913 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
e17a4113 | 1914 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
c906108c SS |
1915 | unsigned LONGEST val; |
1916 | int err; | |
1917 | ||
1918 | if (regno == -1) | |
1919 | { | |
2eb4d78b | 1920 | for (regno = 0; regno < gdbarch_num_regs (gdbarch); regno++) |
28439f5e | 1921 | mips_fetch_registers (ops, regcache, regno); |
c906108c SS |
1922 | return; |
1923 | } | |
1924 | ||
2eb4d78b | 1925 | if (regno == gdbarch_deprecated_fp_regnum (gdbarch) |
064f5156 UW |
1926 | || regno == MIPS_ZERO_REGNUM) |
1927 | /* gdbarch_deprecated_fp_regnum on the mips is a hack which is just | |
0ba6dca9 | 1928 | supposed to read zero (see also mips-nat.c). */ |
c906108c SS |
1929 | val = 0; |
1930 | else | |
1931 | { | |
1932 | /* If PMON doesn't support this register, don't waste serial | |
1933 | bandwidth trying to read it. */ | |
74ed0bb4 | 1934 | int pmon_reg = mips_map_regno (gdbarch, regno); |
c906108c SS |
1935 | if (regno != 0 && pmon_reg == 0) |
1936 | val = 0; | |
1937 | else | |
1938 | { | |
1939 | /* Unfortunately the PMON version in the Vr4300 board has been | |
1940 | compiled without the 64bit register access commands. This | |
1941 | means we cannot get hold of the full register width. */ | |
1942 | if (mips_monitor == MON_DDB) | |
4014092b AC |
1943 | val = (unsigned) mips_request ('t', pmon_reg, 0, |
1944 | &err, mips_receive_wait, NULL); | |
c906108c | 1945 | else |
4014092b AC |
1946 | val = mips_request ('r', pmon_reg, 0, |
1947 | &err, mips_receive_wait, NULL); | |
c906108c SS |
1948 | if (err) |
1949 | mips_error ("Can't read register %d: %s", regno, | |
1950 | safe_strerror (errno)); | |
1951 | } | |
1952 | } | |
1953 | ||
1954 | { | |
123a958e | 1955 | char buf[MAX_REGISTER_SIZE]; |
c906108c SS |
1956 | |
1957 | /* We got the number the register holds, but gdb expects to see a | |
1958 | value in the target byte ordering. */ | |
e17a4113 UW |
1959 | store_unsigned_integer (buf, register_size (gdbarch, regno), |
1960 | byte_order, val); | |
56be3814 | 1961 | regcache_raw_supply (regcache, regno, buf); |
c906108c SS |
1962 | } |
1963 | } | |
1964 | ||
1965 | /* Prepare to store registers. The MIPS protocol can store individual | |
1966 | registers, so this function doesn't have to do anything. */ | |
1967 | ||
1968 | static void | |
316f2060 | 1969 | mips_prepare_to_store (struct regcache *regcache) |
c906108c SS |
1970 | { |
1971 | } | |
1972 | ||
1973 | /* Store remote register(s). */ | |
1974 | ||
1975 | static void | |
28439f5e PA |
1976 | mips_store_registers (struct target_ops *ops, |
1977 | struct regcache *regcache, int regno) | |
c906108c | 1978 | { |
2eb4d78b | 1979 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
56be3814 | 1980 | ULONGEST val; |
c906108c SS |
1981 | int err; |
1982 | ||
1983 | if (regno == -1) | |
1984 | { | |
2eb4d78b | 1985 | for (regno = 0; regno < gdbarch_num_regs (gdbarch); regno++) |
28439f5e | 1986 | mips_store_registers (ops, regcache, regno); |
c906108c SS |
1987 | return; |
1988 | } | |
1989 | ||
56be3814 | 1990 | regcache_cooked_read_unsigned (regcache, regno, &val); |
74ed0bb4 | 1991 | mips_request ('R', mips_map_regno (gdbarch, regno), val, |
c906108c SS |
1992 | &err, mips_receive_wait, NULL); |
1993 | if (err) | |
1994 | mips_error ("Can't write register %d: %s", regno, safe_strerror (errno)); | |
1995 | } | |
1996 | ||
1997 | /* Fetch a word from the target board. */ | |
1998 | ||
c5aa993b | 1999 | static unsigned int |
fba45db2 | 2000 | mips_fetch_word (CORE_ADDR addr) |
c906108c SS |
2001 | { |
2002 | unsigned int val; | |
2003 | int err; | |
2004 | ||
4014092b | 2005 | val = mips_request ('d', addr, 0, &err, mips_receive_wait, NULL); |
c906108c SS |
2006 | if (err) |
2007 | { | |
2008 | /* Data space failed; try instruction space. */ | |
4014092b | 2009 | val = mips_request ('i', addr, 0, &err, |
c906108c SS |
2010 | mips_receive_wait, NULL); |
2011 | if (err) | |
5af949e3 UW |
2012 | mips_error ("Can't read address %s: %s", |
2013 | paddress (target_gdbarch, addr), safe_strerror (errno)); | |
c906108c SS |
2014 | } |
2015 | return val; | |
2016 | } | |
2017 | ||
2018 | /* Store a word to the target board. Returns errno code or zero for | |
2019 | success. If OLD_CONTENTS is non-NULL, put the old contents of that | |
2020 | memory location there. */ | |
2021 | ||
2022 | /* FIXME! make sure only 32-bit quantities get stored! */ | |
2023 | static int | |
e17a4113 | 2024 | mips_store_word (CORE_ADDR addr, unsigned int val, int *old_contents) |
c906108c SS |
2025 | { |
2026 | int err; | |
2027 | unsigned int oldcontents; | |
2028 | ||
4014092b | 2029 | oldcontents = mips_request ('D', addr, val, &err, |
c906108c SS |
2030 | mips_receive_wait, NULL); |
2031 | if (err) | |
2032 | { | |
2033 | /* Data space failed; try instruction space. */ | |
4014092b | 2034 | oldcontents = mips_request ('I', addr, val, &err, |
c906108c SS |
2035 | mips_receive_wait, NULL); |
2036 | if (err) | |
2037 | return errno; | |
2038 | } | |
2039 | if (old_contents != NULL) | |
e17a4113 | 2040 | *old_contents = oldcontents; |
c906108c SS |
2041 | return 0; |
2042 | } | |
2043 | ||
2044 | /* Read or write LEN bytes from inferior memory at MEMADDR, | |
2045 | transferring to or from debugger address MYADDR. Write to inferior | |
2046 | if SHOULD_WRITE is nonzero. Returns length of data written or | |
2047 | read; 0 for error. Note that protocol gives us the correct value | |
2048 | for a longword, since it transfers values in ASCII. We want the | |
2049 | byte values, so we have to swap the longword values. */ | |
2050 | ||
4014092b AC |
2051 | static int mask_address_p = 1; |
2052 | ||
c906108c | 2053 | static int |
7d12900b | 2054 | mips_xfer_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len, int write, |
0a65a603 | 2055 | struct mem_attrib *attrib, struct target_ops *target) |
c906108c | 2056 | { |
e17a4113 | 2057 | enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch); |
4014092b AC |
2058 | int i; |
2059 | CORE_ADDR addr; | |
2060 | int count; | |
2061 | char *buffer; | |
2062 | int status; | |
2063 | ||
2064 | /* PMON targets do not cope well with 64 bit addresses. Mask the | |
2065 | value down to 32 bits. */ | |
2066 | if (mask_address_p) | |
2067 | memaddr &= (CORE_ADDR) 0xffffffff; | |
2068 | ||
c906108c | 2069 | /* Round starting address down to longword boundary. */ |
4014092b | 2070 | addr = memaddr & ~3; |
c906108c | 2071 | /* Round ending address up; get number of longwords that makes. */ |
4014092b | 2072 | count = (((memaddr + len) - addr) + 3) / 4; |
c906108c | 2073 | /* Allocate buffer of that many longwords. */ |
4014092b | 2074 | buffer = alloca (count * 4); |
c906108c SS |
2075 | |
2076 | if (write) | |
2077 | { | |
2078 | /* Fill start and end extra bytes of buffer with existing data. */ | |
2079 | if (addr != memaddr || len < 4) | |
2080 | { | |
2081 | /* Need part of initial word -- fetch it. */ | |
e17a4113 UW |
2082 | store_unsigned_integer (&buffer[0], 4, byte_order, |
2083 | mips_fetch_word (addr)); | |
c906108c SS |
2084 | } |
2085 | ||
2086 | if (count > 1) | |
2087 | { | |
2088 | /* Need part of last word -- fetch it. FIXME: we do this even | |
2089 | if we don't need it. */ | |
e17a4113 | 2090 | store_unsigned_integer (&buffer[(count - 1) * 4], 4, byte_order, |
c906108c SS |
2091 | mips_fetch_word (addr + (count - 1) * 4)); |
2092 | } | |
2093 | ||
2094 | /* Copy data to be written over corresponding part of buffer */ | |
2095 | ||
2096 | memcpy ((char *) buffer + (memaddr & 3), myaddr, len); | |
2097 | ||
2098 | /* Write the entire buffer. */ | |
2099 | ||
2100 | for (i = 0; i < count; i++, addr += 4) | |
2101 | { | |
e17a4113 UW |
2102 | int word; |
2103 | word = extract_unsigned_integer (&buffer[i * 4], 4, byte_order); | |
2104 | status = mips_store_word (addr, word, NULL); | |
c906108c | 2105 | /* Report each kilobyte (we download 32-bit words at a time) */ |
c5aa993b | 2106 | if (i % 256 == 255) |
c906108c SS |
2107 | { |
2108 | printf_unfiltered ("*"); | |
2109 | gdb_flush (gdb_stdout); | |
2110 | } | |
2111 | if (status) | |
2112 | { | |
2113 | errno = status; | |
2114 | return 0; | |
2115 | } | |
2116 | /* FIXME: Do we want a QUIT here? */ | |
2117 | } | |
2118 | if (count >= 256) | |
2119 | printf_unfiltered ("\n"); | |
2120 | } | |
2121 | else | |
2122 | { | |
2123 | /* Read all the longwords */ | |
2124 | for (i = 0; i < count; i++, addr += 4) | |
2125 | { | |
e17a4113 UW |
2126 | store_unsigned_integer (&buffer[i * 4], 4, byte_order, |
2127 | mips_fetch_word (addr)); | |
c906108c SS |
2128 | QUIT; |
2129 | } | |
2130 | ||
2131 | /* Copy appropriate bytes out of the buffer. */ | |
2132 | memcpy (myaddr, buffer + (memaddr & 3), len); | |
2133 | } | |
2134 | return len; | |
2135 | } | |
2136 | ||
2137 | /* Print info on this target. */ | |
2138 | ||
2139 | static void | |
fba45db2 | 2140 | mips_files_info (struct target_ops *ignore) |
c906108c SS |
2141 | { |
2142 | printf_unfiltered ("Debugging a MIPS board over a serial line.\n"); | |
2143 | } | |
2144 | ||
2145 | /* Kill the process running on the board. This will actually only | |
2146 | work if we are doing remote debugging over the console input. I | |
2147 | think that if IDT/sim had the remote debug interrupt enabled on the | |
2148 | right port, we could interrupt the process with a break signal. */ | |
2149 | ||
2150 | static void | |
7d85a9c0 | 2151 | mips_kill (struct target_ops *ops) |
c906108c SS |
2152 | { |
2153 | if (!mips_wait_flag) | |
8eeafb51 KB |
2154 | { |
2155 | target_mourn_inferior (); | |
2156 | return; | |
2157 | } | |
c906108c SS |
2158 | |
2159 | interrupt_count++; | |
2160 | ||
2161 | if (interrupt_count >= 2) | |
2162 | { | |
2163 | interrupt_count = 0; | |
2164 | ||
2165 | target_terminal_ours (); | |
2166 | ||
9e2f0ad4 HZ |
2167 | if (query (_("Interrupted while waiting for the program.\n\ |
2168 | Give up (and stop debugging it)? "))) | |
c906108c SS |
2169 | { |
2170 | /* Clean up in such a way that mips_close won't try to talk to the | |
2171 | board (it almost surely won't work since we weren't able to talk to | |
2172 | it). */ | |
2173 | mips_wait_flag = 0; | |
c5aa993b | 2174 | close_ports (); |
c906108c SS |
2175 | |
2176 | printf_unfiltered ("Ending remote MIPS debugging.\n"); | |
2177 | target_mourn_inferior (); | |
2178 | ||
315a522e | 2179 | deprecated_throw_reason (RETURN_QUIT); |
c906108c SS |
2180 | } |
2181 | ||
2182 | target_terminal_inferior (); | |
2183 | } | |
2184 | ||
2185 | if (remote_debug > 0) | |
2186 | printf_unfiltered ("Sending break\n"); | |
2187 | ||
2cd58942 | 2188 | serial_send_break (mips_desc); |
c906108c | 2189 | |
8eeafb51 KB |
2190 | target_mourn_inferior (); |
2191 | ||
c906108c SS |
2192 | #if 0 |
2193 | if (mips_is_open) | |
2194 | { | |
2195 | char cc; | |
2196 | ||
2197 | /* Send a ^C. */ | |
2198 | cc = '\003'; | |
2cd58942 | 2199 | serial_write (mips_desc, &cc, 1); |
c906108c SS |
2200 | sleep (1); |
2201 | target_mourn_inferior (); | |
2202 | } | |
2203 | #endif | |
2204 | } | |
2205 | ||
2206 | /* Start running on the target board. */ | |
2207 | ||
2208 | static void | |
383c0389 JB |
2209 | mips_create_inferior (struct target_ops *ops, char *execfile, |
2210 | char *args, char **env, int from_tty) | |
c906108c SS |
2211 | { |
2212 | CORE_ADDR entry_pt; | |
2213 | ||
2214 | if (args && *args) | |
2215 | { | |
2216 | warning ("\ | |
2217 | Can't pass arguments to remote MIPS board; arguments ignored."); | |
2218 | /* And don't try to use them on the next "run" command. */ | |
2219 | execute_command ("set args", 0); | |
2220 | } | |
2221 | ||
2222 | if (execfile == 0 || exec_bfd == 0) | |
2223 | error ("No executable file specified"); | |
2224 | ||
2225 | entry_pt = (CORE_ADDR) bfd_get_start_address (exec_bfd); | |
2226 | ||
2227 | init_wait_for_inferior (); | |
2228 | ||
fb14de7b | 2229 | regcache_write_pc (get_current_regcache (), entry_pt); |
c906108c SS |
2230 | } |
2231 | ||
8eeafb51 KB |
2232 | /* Clean up after a process. The bulk of the work is done in mips_close(), |
2233 | which is called when unpushing the target. */ | |
c906108c SS |
2234 | |
2235 | static void | |
383c0389 | 2236 | mips_mourn_inferior (struct target_ops *ops) |
c906108c SS |
2237 | { |
2238 | if (current_ops != NULL) | |
2239 | unpush_target (current_ops); | |
c906108c SS |
2240 | } |
2241 | \f | |
2242 | /* We can write a breakpoint and read the shadow contents in one | |
2243 | operation. */ | |
2244 | ||
aaab4dba AC |
2245 | /* Insert a breakpoint. On targets that don't have built-in |
2246 | breakpoint support, we read the contents of the target location and | |
2247 | stash it, then overwrite it with a breakpoint instruction. ADDR is | |
8181d85f DJ |
2248 | the target location in the target machine. BPT is the breakpoint |
2249 | being inserted or removed, which contains memory for saving the | |
2250 | target contents. */ | |
c906108c SS |
2251 | |
2252 | static int | |
a6d9a66e UW |
2253 | mips_insert_breakpoint (struct gdbarch *gdbarch, |
2254 | struct bp_target_info *bp_tgt) | |
c906108c SS |
2255 | { |
2256 | if (monitor_supports_breakpoints) | |
06b1d59c MR |
2257 | return mips_set_breakpoint (bp_tgt->placed_address, MIPS_INSN32_SIZE, |
2258 | BREAK_FETCH); | |
c906108c | 2259 | else |
a6d9a66e | 2260 | return memory_insert_breakpoint (gdbarch, bp_tgt); |
c906108c SS |
2261 | } |
2262 | ||
2263 | static int | |
a6d9a66e UW |
2264 | mips_remove_breakpoint (struct gdbarch *gdbarch, |
2265 | struct bp_target_info *bp_tgt) | |
c906108c SS |
2266 | { |
2267 | if (monitor_supports_breakpoints) | |
06b1d59c MR |
2268 | return mips_clear_breakpoint (bp_tgt->placed_address, MIPS_INSN32_SIZE, |
2269 | BREAK_FETCH); | |
c906108c | 2270 | else |
a6d9a66e | 2271 | return memory_remove_breakpoint (gdbarch, bp_tgt); |
c906108c SS |
2272 | } |
2273 | ||
c906108c SS |
2274 | /* Tell whether this target can support a hardware breakpoint. CNT |
2275 | is the number of hardware breakpoints already installed. This | |
d92524f1 | 2276 | implements the target_can_use_hardware_watchpoint macro. */ |
c906108c SS |
2277 | |
2278 | int | |
546143b6 | 2279 | mips_can_use_watchpoint (int type, int cnt, int othertype) |
c906108c | 2280 | { |
c5aa993b | 2281 | return cnt < MAX_LSI_BREAKPOINTS && strcmp (target_shortname, "lsi") == 0; |
c906108c SS |
2282 | } |
2283 | ||
2284 | ||
2285 | /* Compute a don't care mask for the region bounding ADDR and ADDR + LEN - 1. | |
2286 | This is used for memory ref breakpoints. */ | |
2287 | ||
2288 | static unsigned long | |
fba45db2 | 2289 | calculate_mask (CORE_ADDR addr, int len) |
c906108c SS |
2290 | { |
2291 | unsigned long mask; | |
2292 | int i; | |
2293 | ||
2294 | mask = addr ^ (addr + len - 1); | |
2295 | ||
2296 | for (i = 32; i >= 0; i--) | |
2297 | if (mask == 0) | |
2298 | break; | |
2299 | else | |
2300 | mask >>= 1; | |
2301 | ||
2302 | mask = (unsigned long) 0xffffffff >> i; | |
2303 | ||
2304 | return mask; | |
2305 | } | |
2306 | ||
2307 | ||
c906108c SS |
2308 | /* Set a data watchpoint. ADDR and LEN should be obvious. TYPE is 0 |
2309 | for a write watchpoint, 1 for a read watchpoint, or 2 for a read/write | |
2310 | watchpoint. */ | |
2311 | ||
2312 | int | |
546143b6 | 2313 | mips_insert_watchpoint (CORE_ADDR addr, int len, int type) |
c906108c | 2314 | { |
06b1d59c | 2315 | if (mips_set_breakpoint (addr, len, type)) |
c906108c SS |
2316 | return -1; |
2317 | ||
2318 | return 0; | |
2319 | } | |
2320 | ||
2321 | int | |
546143b6 | 2322 | mips_remove_watchpoint (CORE_ADDR addr, int len, int type) |
c906108c | 2323 | { |
06b1d59c | 2324 | if (mips_clear_breakpoint (addr, len, type)) |
c906108c SS |
2325 | return -1; |
2326 | ||
2327 | return 0; | |
2328 | } | |
2329 | ||
2330 | int | |
546143b6 | 2331 | mips_stopped_by_watchpoint (void) |
c906108c SS |
2332 | { |
2333 | return hit_watchpoint; | |
2334 | } | |
2335 | ||
2336 | ||
2337 | /* Insert a breakpoint. */ | |
2338 | ||
2339 | static int | |
06b1d59c | 2340 | mips_set_breakpoint (CORE_ADDR addr, int len, enum break_type type) |
c906108c | 2341 | { |
06b1d59c | 2342 | return mips_common_breakpoint (1, addr, len, type); |
c906108c SS |
2343 | } |
2344 | ||
2345 | ||
2346 | /* Clear a breakpoint. */ | |
2347 | ||
2348 | static int | |
06b1d59c | 2349 | mips_clear_breakpoint (CORE_ADDR addr, int len, enum break_type type) |
c906108c | 2350 | { |
06b1d59c | 2351 | return mips_common_breakpoint (0, addr, len, type); |
c906108c SS |
2352 | } |
2353 | ||
2354 | ||
2355 | /* Check the error code from the return packet for an LSI breakpoint | |
2356 | command. If there's no error, just return 0. If it's a warning, | |
2357 | print the warning text and return 0. If it's an error, print | |
2358 | the error text and return 1. <ADDR> is the address of the breakpoint | |
2359 | that was being set. <RERRFLG> is the error code returned by PMON. | |
06b1d59c | 2360 | This is a helper function for mips_common_breakpoint. */ |
c906108c SS |
2361 | |
2362 | static int | |
06b1d59c | 2363 | mips_check_lsi_error (CORE_ADDR addr, int rerrflg) |
c906108c SS |
2364 | { |
2365 | struct lsi_error *err; | |
5af949e3 | 2366 | char *saddr = paddress (target_gdbarch, addr); |
c906108c SS |
2367 | |
2368 | if (rerrflg == 0) /* no error */ | |
2369 | return 0; | |
2370 | ||
2371 | /* Warnings can be ORed together, so check them all. */ | |
2372 | if (rerrflg & W_WARN) | |
2373 | { | |
2374 | if (monitor_warnings) | |
2375 | { | |
2376 | int found = 0; | |
2377 | for (err = lsi_warning_table; err->code != 0; err++) | |
2378 | { | |
2379 | if ((err->code & rerrflg) == err->code) | |
2380 | { | |
2381 | found = 1; | |
06b1d59c | 2382 | fprintf_unfiltered (gdb_stderr, "\ |
5af949e3 | 2383 | mips_common_breakpoint (%s): Warning: %s\n", |
c906108c SS |
2384 | saddr, |
2385 | err->string); | |
2386 | } | |
2387 | } | |
2388 | if (!found) | |
06b1d59c | 2389 | fprintf_unfiltered (gdb_stderr, "\ |
5af949e3 | 2390 | mips_common_breakpoint (%s): Unknown warning: 0x%x\n", |
c906108c SS |
2391 | saddr, |
2392 | rerrflg); | |
2393 | } | |
2394 | return 0; | |
2395 | } | |
2396 | ||
2397 | /* Errors are unique, i.e. can't be ORed together. */ | |
2398 | for (err = lsi_error_table; err->code != 0; err++) | |
2399 | { | |
2400 | if ((err->code & rerrflg) == err->code) | |
2401 | { | |
06b1d59c | 2402 | fprintf_unfiltered (gdb_stderr, "\ |
5af949e3 | 2403 | mips_common_breakpoint (%s): Error: %s\n", |
c906108c SS |
2404 | saddr, |
2405 | err->string); | |
2406 | return 1; | |
2407 | } | |
2408 | } | |
06b1d59c | 2409 | fprintf_unfiltered (gdb_stderr, "\ |
5af949e3 | 2410 | mips_common_breakpoint (%s): Unknown error: 0x%x\n", |
c906108c SS |
2411 | saddr, |
2412 | rerrflg); | |
2413 | return 1; | |
2414 | } | |
2415 | ||
2416 | ||
2417 | /* This routine sends a breakpoint command to the remote target. | |
2418 | ||
2419 | <SET> is 1 if setting a breakpoint, or 0 if clearing a breakpoint. | |
2420 | <ADDR> is the address of the breakpoint. | |
2421 | <LEN> the length of the region to break on. | |
2422 | <TYPE> is the type of breakpoint: | |
c5aa993b JM |
2423 | 0 = write (BREAK_WRITE) |
2424 | 1 = read (BREAK_READ) | |
2425 | 2 = read/write (BREAK_ACCESS) | |
2426 | 3 = instruction fetch (BREAK_FETCH) | |
c906108c SS |
2427 | |
2428 | Return 0 if successful; otherwise 1. */ | |
2429 | ||
2430 | static int | |
06b1d59c | 2431 | mips_common_breakpoint (int set, CORE_ADDR addr, int len, enum break_type type) |
c906108c | 2432 | { |
5af949e3 | 2433 | int addr_size = gdbarch_addr_bit (target_gdbarch) / 8; |
c906108c SS |
2434 | char buf[DATA_MAXLEN + 1]; |
2435 | char cmd, rcmd; | |
2436 | int rpid, rerrflg, rresponse, rlen; | |
2437 | int nfields; | |
2438 | ||
1cf3db46 | 2439 | addr = gdbarch_addr_bits_remove (target_gdbarch, addr); |
c906108c SS |
2440 | |
2441 | if (mips_monitor == MON_LSI) | |
2442 | { | |
c5aa993b | 2443 | if (set == 0) /* clear breakpoint */ |
c906108c SS |
2444 | { |
2445 | /* The LSI PMON "clear breakpoint" has this form: | |
c5aa993b JM |
2446 | <pid> 'b' <bptn> 0x0 |
2447 | reply: | |
2448 | <pid> 'b' 0x0 <code> | |
c906108c SS |
2449 | |
2450 | <bptn> is a breakpoint number returned by an earlier 'B' command. | |
2451 | Possible return codes: OK, E_BPT. */ | |
2452 | ||
2453 | int i; | |
2454 | ||
2455 | /* Search for the breakpoint in the table. */ | |
2456 | for (i = 0; i < MAX_LSI_BREAKPOINTS; i++) | |
2457 | if (lsi_breakpoints[i].type == type | |
2458 | && lsi_breakpoints[i].addr == addr | |
2459 | && lsi_breakpoints[i].len == len) | |
2460 | break; | |
2461 | ||
2462 | /* Clear the table entry and tell PMON to clear the breakpoint. */ | |
2463 | if (i == MAX_LSI_BREAKPOINTS) | |
2464 | { | |
06b1d59c MR |
2465 | warning ("\ |
2466 | mips_common_breakpoint: Attempt to clear bogus breakpoint at %s\n", | |
5af949e3 | 2467 | paddress (target_gdbarch, addr)); |
c906108c SS |
2468 | return 1; |
2469 | } | |
2470 | ||
2471 | lsi_breakpoints[i].type = BREAK_UNUSED; | |
2472 | sprintf (buf, "0x0 b 0x%x 0x0", i); | |
2473 | mips_send_packet (buf, 1); | |
2474 | ||
2475 | rlen = mips_receive_packet (buf, 1, mips_receive_wait); | |
2476 | buf[rlen] = '\0'; | |
2477 | ||
2478 | nfields = sscanf (buf, "0x%x b 0x0 0x%x", &rpid, &rerrflg); | |
2479 | if (nfields != 2) | |
06b1d59c MR |
2480 | mips_error ("\ |
2481 | mips_common_breakpoint: Bad response from remote board: %s", | |
2482 | buf); | |
c906108c | 2483 | |
06b1d59c | 2484 | return (mips_check_lsi_error (addr, rerrflg)); |
c906108c | 2485 | } |
c5aa993b JM |
2486 | else |
2487 | /* set a breakpoint */ | |
c906108c SS |
2488 | { |
2489 | /* The LSI PMON "set breakpoint" command has this form: | |
c5aa993b JM |
2490 | <pid> 'B' <addr> 0x0 |
2491 | reply: | |
2492 | <pid> 'B' <bptn> <code> | |
c906108c SS |
2493 | |
2494 | The "set data breakpoint" command has this form: | |
2495 | ||
c5aa993b | 2496 | <pid> 'A' <addr1> <type> [<addr2> [<value>]] |
c906108c | 2497 | |
c5aa993b JM |
2498 | where: type= "0x1" = read |
2499 | "0x2" = write | |
2500 | "0x3" = access (read or write) | |
c906108c SS |
2501 | |
2502 | The reply returns two values: | |
c5aa993b JM |
2503 | bptn - a breakpoint number, which is a small integer with |
2504 | possible values of zero through 255. | |
2505 | code - an error return code, a value of zero indicates a | |
2506 | succesful completion, other values indicate various | |
2507 | errors and warnings. | |
2508 | ||
c906108c SS |
2509 | Possible return codes: OK, W_QAL, E_QAL, E_OUT, E_NON. |
2510 | ||
c5aa993b | 2511 | */ |
c906108c SS |
2512 | |
2513 | if (type == BREAK_FETCH) /* instruction breakpoint */ | |
2514 | { | |
2515 | cmd = 'B'; | |
5af949e3 | 2516 | sprintf (buf, "0x0 B 0x%s 0x0", phex_nz (addr, addr_size)); |
c906108c | 2517 | } |
c5aa993b JM |
2518 | else |
2519 | /* watchpoint */ | |
c906108c SS |
2520 | { |
2521 | cmd = 'A'; | |
5af949e3 UW |
2522 | sprintf (buf, "0x0 A 0x%s 0x%x 0x%s", |
2523 | phex_nz (addr, addr_size), | |
2524 | type == BREAK_READ ? 1 : (type == BREAK_WRITE ? 2 : 3), | |
2525 | phex_nz (addr + len - 1, addr_size)); | |
c906108c SS |
2526 | } |
2527 | mips_send_packet (buf, 1); | |
2528 | ||
2529 | rlen = mips_receive_packet (buf, 1, mips_receive_wait); | |
2530 | buf[rlen] = '\0'; | |
2531 | ||
2532 | nfields = sscanf (buf, "0x%x %c 0x%x 0x%x", | |
2533 | &rpid, &rcmd, &rresponse, &rerrflg); | |
2534 | if (nfields != 4 || rcmd != cmd || rresponse > 255) | |
06b1d59c MR |
2535 | mips_error ("\ |
2536 | mips_common_breakpoint: Bad response from remote board: %s", | |
2537 | buf); | |
c906108c SS |
2538 | |
2539 | if (rerrflg != 0) | |
06b1d59c | 2540 | if (mips_check_lsi_error (addr, rerrflg)) |
c906108c SS |
2541 | return 1; |
2542 | ||
2543 | /* rresponse contains PMON's breakpoint number. Record the | |
2544 | information for this breakpoint so we can clear it later. */ | |
2545 | lsi_breakpoints[rresponse].type = type; | |
2546 | lsi_breakpoints[rresponse].addr = addr; | |
c5aa993b | 2547 | lsi_breakpoints[rresponse].len = len; |
c906108c SS |
2548 | |
2549 | return 0; | |
2550 | } | |
2551 | } | |
2552 | else | |
2553 | { | |
2554 | /* On non-LSI targets, the breakpoint command has this form: | |
c5aa993b JM |
2555 | 0x0 <CMD> <ADDR> <MASK> <FLAGS> |
2556 | <MASK> is a don't care mask for addresses. | |
2557 | <FLAGS> is any combination of `r', `w', or `f' for read/write/fetch. | |
c906108c SS |
2558 | */ |
2559 | unsigned long mask; | |
2560 | ||
2561 | mask = calculate_mask (addr, len); | |
2562 | addr &= ~mask; | |
2563 | ||
c5aa993b JM |
2564 | if (set) /* set a breakpoint */ |
2565 | { | |
c906108c SS |
2566 | char *flags; |
2567 | switch (type) | |
2568 | { | |
c5aa993b | 2569 | case BREAK_WRITE: /* write */ |
c906108c SS |
2570 | flags = "w"; |
2571 | break; | |
c5aa993b | 2572 | case BREAK_READ: /* read */ |
c906108c SS |
2573 | flags = "r"; |
2574 | break; | |
c5aa993b | 2575 | case BREAK_ACCESS: /* read/write */ |
c906108c SS |
2576 | flags = "rw"; |
2577 | break; | |
c5aa993b | 2578 | case BREAK_FETCH: /* fetch */ |
c906108c SS |
2579 | flags = "f"; |
2580 | break; | |
2581 | default: | |
e2e0b3e5 | 2582 | internal_error (__FILE__, __LINE__, _("failed internal consistency check")); |
c906108c SS |
2583 | } |
2584 | ||
2585 | cmd = 'B'; | |
5af949e3 UW |
2586 | sprintf (buf, "0x0 B 0x%s 0x%s %s", phex_nz (addr, addr_size), |
2587 | phex_nz (mask, addr_size), flags); | |
c906108c SS |
2588 | } |
2589 | else | |
2590 | { | |
2591 | cmd = 'b'; | |
5af949e3 | 2592 | sprintf (buf, "0x0 b 0x%s", phex_nz (addr, addr_size)); |
c906108c SS |
2593 | } |
2594 | ||
2595 | mips_send_packet (buf, 1); | |
2596 | ||
2597 | rlen = mips_receive_packet (buf, 1, mips_receive_wait); | |
2598 | buf[rlen] = '\0'; | |
2599 | ||
2600 | nfields = sscanf (buf, "0x%x %c 0x%x 0x%x", | |
2601 | &rpid, &rcmd, &rerrflg, &rresponse); | |
2602 | ||
2603 | if (nfields != 4 || rcmd != cmd) | |
06b1d59c MR |
2604 | mips_error ("\ |
2605 | mips_common_breakpoint: Bad response from remote board: %s", | |
c906108c SS |
2606 | buf); |
2607 | ||
2608 | if (rerrflg != 0) | |
2609 | { | |
2610 | /* Ddb returns "0x0 b 0x16 0x0\000", whereas | |
2611 | Cogent returns "0x0 b 0xffffffff 0x16\000": */ | |
2612 | if (mips_monitor == MON_DDB) | |
2613 | rresponse = rerrflg; | |
c5aa993b | 2614 | if (rresponse != 22) /* invalid argument */ |
06b1d59c | 2615 | fprintf_unfiltered (gdb_stderr, "\ |
5af949e3 UW |
2616 | mips_common_breakpoint (%s): Got error: 0x%x\n", |
2617 | paddress (target_gdbarch, addr), rresponse); | |
c906108c SS |
2618 | return 1; |
2619 | } | |
2620 | } | |
2621 | return 0; | |
2622 | } | |
2623 | \f | |
2624 | static void | |
fba45db2 | 2625 | send_srec (char *srec, int len, CORE_ADDR addr) |
c906108c SS |
2626 | { |
2627 | while (1) | |
2628 | { | |
2629 | int ch; | |
2630 | ||
2cd58942 | 2631 | serial_write (mips_desc, srec, len); |
c906108c | 2632 | |
688991e6 | 2633 | ch = mips_readchar (remote_timeout); |
c906108c SS |
2634 | |
2635 | switch (ch) | |
2636 | { | |
2637 | case SERIAL_TIMEOUT: | |
2638 | error ("Timeout during download."); | |
2639 | break; | |
2640 | case 0x6: /* ACK */ | |
2641 | return; | |
2642 | case 0x15: /* NACK */ | |
5af949e3 UW |
2643 | fprintf_unfiltered (gdb_stderr, "Download got a NACK at byte %s! Retrying.\n", |
2644 | paddress (target_gdbarch, addr)); | |
c906108c SS |
2645 | continue; |
2646 | default: | |
2647 | error ("Download got unexpected ack char: 0x%x, retrying.\n", ch); | |
2648 | } | |
2649 | } | |
2650 | } | |
2651 | ||
2652 | /* Download a binary file by converting it to S records. */ | |
2653 | ||
2654 | static void | |
fba45db2 | 2655 | mips_load_srec (char *args) |
c906108c SS |
2656 | { |
2657 | bfd *abfd; | |
2658 | asection *s; | |
2659 | char *buffer, srec[1024]; | |
2660 | unsigned int i; | |
2661 | unsigned int srec_frame = 200; | |
2662 | int reclen; | |
2663 | static int hashmark = 1; | |
2664 | ||
2665 | buffer = alloca (srec_frame * 2 + 256); | |
2666 | ||
2667 | abfd = bfd_openr (args, 0); | |
2668 | if (!abfd) | |
2669 | { | |
2670 | printf_filtered ("Unable to open file %s\n", args); | |
2671 | return; | |
2672 | } | |
2673 | ||
2674 | if (bfd_check_format (abfd, bfd_object) == 0) | |
2675 | { | |
2676 | printf_filtered ("File is not an object file\n"); | |
2677 | return; | |
2678 | } | |
2679 | ||
2680 | /* This actually causes a download in the IDT binary format: */ | |
2681 | mips_send_command (LOAD_CMD, 0); | |
2682 | ||
2683 | for (s = abfd->sections; s; s = s->next) | |
2684 | { | |
2685 | if (s->flags & SEC_LOAD) | |
2686 | { | |
2687 | unsigned int numbytes; | |
2688 | ||
d4f3574e SS |
2689 | /* FIXME! vma too small????? */ |
2690 | printf_filtered ("%s\t: 0x%4lx .. 0x%4lx ", s->name, | |
2691 | (long) s->vma, | |
2c500098 | 2692 | (long) (s->vma + bfd_get_section_size (s))); |
c906108c SS |
2693 | gdb_flush (gdb_stdout); |
2694 | ||
2c500098 | 2695 | for (i = 0; i < bfd_get_section_size (s); i += numbytes) |
c906108c | 2696 | { |
2c500098 | 2697 | numbytes = min (srec_frame, bfd_get_section_size (s) - i); |
c906108c SS |
2698 | |
2699 | bfd_get_section_contents (abfd, s, buffer, i, numbytes); | |
2700 | ||
1fa79fac MS |
2701 | reclen = mips_make_srec (srec, '3', s->vma + i, |
2702 | buffer, numbytes); | |
c906108c SS |
2703 | send_srec (srec, reclen, s->vma + i); |
2704 | ||
9a4105ab AC |
2705 | if (deprecated_ui_load_progress_hook) |
2706 | deprecated_ui_load_progress_hook (s->name, i); | |
7829b833 | 2707 | |
c906108c SS |
2708 | if (hashmark) |
2709 | { | |
2710 | putchar_unfiltered ('#'); | |
2711 | gdb_flush (gdb_stdout); | |
2712 | } | |
2713 | ||
c5aa993b JM |
2714 | } /* Per-packet (or S-record) loop */ |
2715 | ||
c906108c | 2716 | putchar_unfiltered ('\n'); |
c5aa993b | 2717 | } /* Loadable sections */ |
c906108c | 2718 | } |
c5aa993b | 2719 | if (hashmark) |
c906108c | 2720 | putchar_unfiltered ('\n'); |
c5aa993b | 2721 | |
c906108c SS |
2722 | /* Write a type 7 terminator record. no data for a type 7, and there |
2723 | is no data, so len is 0. */ | |
2724 | ||
2725 | reclen = mips_make_srec (srec, '7', abfd->start_address, NULL, 0); | |
2726 | ||
2727 | send_srec (srec, reclen, abfd->start_address); | |
2728 | ||
2cd58942 | 2729 | serial_flush_input (mips_desc); |
c906108c SS |
2730 | } |
2731 | ||
2732 | /* | |
2733 | * mips_make_srec -- make an srecord. This writes each line, one at a | |
c5aa993b JM |
2734 | * time, each with it's own header and trailer line. |
2735 | * An srecord looks like this: | |
c906108c SS |
2736 | * |
2737 | * byte count-+ address | |
2738 | * start ---+ | | data +- checksum | |
c5aa993b JM |
2739 | * | | | | |
2740 | * S01000006F6B692D746573742E73726563E4 | |
2741 | * S315000448600000000000000000FC00005900000000E9 | |
2742 | * S31A0004000023C1400037DE00F023604000377B009020825000348D | |
2743 | * S30B0004485A0000000000004E | |
2744 | * S70500040000F6 | |
c906108c | 2745 | * |
c5aa993b | 2746 | * S<type><length><address><data><checksum> |
c906108c SS |
2747 | * |
2748 | * Where | |
2749 | * - length | |
2750 | * is the number of bytes following upto the checksum. Note that | |
2751 | * this is not the number of chars following, since it takes two | |
2752 | * chars to represent a byte. | |
2753 | * - type | |
2754 | * is one of: | |
2755 | * 0) header record | |
2756 | * 1) two byte address data record | |
2757 | * 2) three byte address data record | |
2758 | * 3) four byte address data record | |
2759 | * 7) four byte address termination record | |
2760 | * 8) three byte address termination record | |
2761 | * 9) two byte address termination record | |
2762 | * | |
2763 | * - address | |
2764 | * is the start address of the data following, or in the case of | |
2765 | * a termination record, the start address of the image | |
2766 | * - data | |
2767 | * is the data. | |
2768 | * - checksum | |
c5aa993b | 2769 | * is the sum of all the raw byte data in the record, from the length |
c906108c SS |
2770 | * upwards, modulo 256 and subtracted from 255. |
2771 | * | |
2772 | * This routine returns the length of the S-record. | |
2773 | * | |
2774 | */ | |
2775 | ||
2776 | static int | |
fba45db2 KB |
2777 | mips_make_srec (char *buf, int type, CORE_ADDR memaddr, unsigned char *myaddr, |
2778 | int len) | |
c906108c SS |
2779 | { |
2780 | unsigned char checksum; | |
2781 | int i; | |
2782 | ||
2783 | /* Create the header for the srec. addr_size is the number of bytes in the address, | |
2784 | and 1 is the number of bytes in the count. */ | |
2785 | ||
2786 | /* FIXME!! bigger buf required for 64-bit! */ | |
2787 | buf[0] = 'S'; | |
2788 | buf[1] = type; | |
2789 | buf[2] = len + 4 + 1; /* len + 4 byte address + 1 byte checksum */ | |
2790 | /* This assumes S3 style downloads (4byte addresses). There should | |
2791 | probably be a check, or the code changed to make it more | |
2792 | explicit. */ | |
2793 | buf[3] = memaddr >> 24; | |
2794 | buf[4] = memaddr >> 16; | |
2795 | buf[5] = memaddr >> 8; | |
2796 | buf[6] = memaddr; | |
2797 | memcpy (&buf[7], myaddr, len); | |
2798 | ||
2799 | /* Note that the checksum is calculated on the raw data, not the | |
2800 | hexified data. It includes the length, address and the data | |
2801 | portions of the packet. */ | |
2802 | checksum = 0; | |
2803 | buf += 2; /* Point at length byte */ | |
2804 | for (i = 0; i < len + 4 + 1; i++) | |
2805 | checksum += *buf++; | |
2806 | ||
2807 | *buf = ~checksum; | |
2808 | ||
2809 | return len + 8; | |
2810 | } | |
2811 | ||
2812 | /* The following manifest controls whether we enable the simple flow | |
2813 | control support provided by the monitor. If enabled the code will | |
2814 | wait for an affirmative ACK between transmitting packets. */ | |
2815 | #define DOETXACK (1) | |
2816 | ||
2817 | /* The PMON fast-download uses an encoded packet format constructed of | |
2818 | 3byte data packets (encoded as 4 printable ASCII characters), and | |
2819 | escape sequences (preceded by a '/'): | |
2820 | ||
c5aa993b JM |
2821 | 'K' clear checksum |
2822 | 'C' compare checksum (12bit value, not included in checksum calculation) | |
2823 | 'S' define symbol name (for addr) terminated with "," and padded to 4char boundary | |
2824 | 'Z' zero fill multiple of 3bytes | |
2825 | 'B' byte (12bit encoded value, of 8bit data) | |
2826 | 'A' address (36bit encoded value) | |
2827 | 'E' define entry as original address, and exit load | |
c906108c SS |
2828 | |
2829 | The packets are processed in 4 character chunks, so the escape | |
2830 | sequences that do not have any data (or variable length data) | |
2831 | should be padded to a 4 character boundary. The decoder will give | |
2832 | an error if the complete message block size is not a multiple of | |
2833 | 4bytes (size of record). | |
2834 | ||
2835 | The encoding of numbers is done in 6bit fields. The 6bit value is | |
2836 | used to index into this string to get the specific character | |
2837 | encoding for the value: */ | |
2838 | static char encoding[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789,."; | |
2839 | ||
2840 | /* Convert the number of bits required into an encoded number, 6bits | |
2841 | at a time (range 0..63). Keep a checksum if required (passed | |
2842 | pointer non-NULL). The function returns the number of encoded | |
2843 | characters written into the buffer. */ | |
2844 | static int | |
fba45db2 | 2845 | pmon_makeb64 (unsigned long v, char *p, int n, int *chksum) |
c906108c SS |
2846 | { |
2847 | int count = (n / 6); | |
2848 | ||
c5aa993b JM |
2849 | if ((n % 12) != 0) |
2850 | { | |
2851 | fprintf_unfiltered (gdb_stderr, | |
2852 | "Fast encoding bitcount must be a multiple of 12bits: %dbit%s\n", n, (n == 1) ? "" : "s"); | |
2853 | return (0); | |
2854 | } | |
2855 | if (n > 36) | |
2856 | { | |
2857 | fprintf_unfiltered (gdb_stderr, | |
2858 | "Fast encoding cannot process more than 36bits at the moment: %dbits\n", n); | |
2859 | return (0); | |
2860 | } | |
c906108c SS |
2861 | |
2862 | /* Deal with the checksum: */ | |
c5aa993b JM |
2863 | if (chksum != NULL) |
2864 | { | |
2865 | switch (n) | |
2866 | { | |
2867 | case 36: | |
2868 | *chksum += ((v >> 24) & 0xFFF); | |
2869 | case 24: | |
2870 | *chksum += ((v >> 12) & 0xFFF); | |
2871 | case 12: | |
2872 | *chksum += ((v >> 0) & 0xFFF); | |
2873 | } | |
c906108c | 2874 | } |
c906108c | 2875 | |
c5aa993b JM |
2876 | do |
2877 | { | |
2878 | n -= 6; | |
2879 | *p++ = encoding[(v >> n) & 0x3F]; | |
2880 | } | |
2881 | while (n > 0); | |
c906108c | 2882 | |
c5aa993b | 2883 | return (count); |
c906108c SS |
2884 | } |
2885 | ||
2886 | /* Shorthand function (that could be in-lined) to output the zero-fill | |
2887 | escape sequence into the data stream. */ | |
2888 | static int | |
fba45db2 | 2889 | pmon_zeroset (int recsize, char **buff, int *amount, unsigned int *chksum) |
c906108c SS |
2890 | { |
2891 | int count; | |
2892 | ||
c5aa993b | 2893 | sprintf (*buff, "/Z"); |
c906108c SS |
2894 | count = pmon_makeb64 (*amount, (*buff + 2), 12, chksum); |
2895 | *buff += (count + 2); | |
2896 | *amount = 0; | |
c5aa993b | 2897 | return (recsize + count + 2); |
c906108c SS |
2898 | } |
2899 | ||
2900 | static int | |
fba45db2 | 2901 | pmon_checkset (int recsize, char **buff, int *value) |
c906108c SS |
2902 | { |
2903 | int count; | |
2904 | ||
2905 | /* Add the checksum (without updating the value): */ | |
2906 | sprintf (*buff, "/C"); | |
2907 | count = pmon_makeb64 (*value, (*buff + 2), 12, NULL); | |
2908 | *buff += (count + 2); | |
2909 | sprintf (*buff, "\n"); | |
c5aa993b | 2910 | *buff += 2; /* include zero terminator */ |
c906108c SS |
2911 | /* Forcing a checksum validation clears the sum: */ |
2912 | *value = 0; | |
c5aa993b | 2913 | return (recsize + count + 3); |
c906108c SS |
2914 | } |
2915 | ||
2916 | /* Amount of padding we leave after at the end of the output buffer, | |
2917 | for the checksum and line termination characters: */ | |
2918 | #define CHECKSIZE (4 + 4 + 4 + 2) | |
2919 | /* zero-fill, checksum, transfer end and line termination space. */ | |
2920 | ||
2921 | /* The amount of binary data loaded from the object file in a single | |
2922 | operation: */ | |
2923 | #define BINCHUNK (1024) | |
2924 | ||
2925 | /* Maximum line of data accepted by the monitor: */ | |
2926 | #define MAXRECSIZE (550) | |
2927 | /* NOTE: This constant depends on the monitor being used. This value | |
2928 | is for PMON 5.x on the Cogent Vr4300 board. */ | |
2929 | ||
2930 | static void | |
fba45db2 KB |
2931 | pmon_make_fastrec (char **outbuf, unsigned char *inbuf, int *inptr, |
2932 | int inamount, int *recsize, unsigned int *csum, | |
2933 | unsigned int *zerofill) | |
c906108c SS |
2934 | { |
2935 | int count = 0; | |
2936 | char *p = *outbuf; | |
2937 | ||
2938 | /* This is a simple check to ensure that our data will fit within | |
2939 | the maximum allowable record size. Each record output is 4bytes | |
2940 | in length. We must allow space for a pending zero fill command, | |
2941 | the record, and a checksum record. */ | |
c5aa993b JM |
2942 | while ((*recsize < (MAXRECSIZE - CHECKSIZE)) && ((inamount - *inptr) > 0)) |
2943 | { | |
2944 | /* Process the binary data: */ | |
2945 | if ((inamount - *inptr) < 3) | |
2946 | { | |
2947 | if (*zerofill != 0) | |
2948 | *recsize = pmon_zeroset (*recsize, &p, zerofill, csum); | |
2949 | sprintf (p, "/B"); | |
2950 | count = pmon_makeb64 (inbuf[*inptr], &p[2], 12, csum); | |
2951 | p += (2 + count); | |
2952 | *recsize += (2 + count); | |
2953 | (*inptr)++; | |
2954 | } | |
2955 | else | |
2956 | { | |
2957 | unsigned int value = ((inbuf[*inptr + 0] << 16) | (inbuf[*inptr + 1] << 8) | inbuf[*inptr + 2]); | |
2958 | /* Simple check for zero data. TODO: A better check would be | |
2959 | to check the last, and then the middle byte for being zero | |
2960 | (if the first byte is not). We could then check for | |
2961 | following runs of zeros, and if above a certain size it is | |
2962 | worth the 4 or 8 character hit of the byte insertions used | |
2963 | to pad to the start of the zeroes. NOTE: This also depends | |
2964 | on the alignment at the end of the zero run. */ | |
2965 | if (value == 0x00000000) | |
2966 | { | |
2967 | (*zerofill)++; | |
2968 | if (*zerofill == 0xFFF) /* 12bit counter */ | |
2969 | *recsize = pmon_zeroset (*recsize, &p, zerofill, csum); | |
2970 | } | |
2971 | else | |
2972 | { | |
2973 | if (*zerofill != 0) | |
2974 | *recsize = pmon_zeroset (*recsize, &p, zerofill, csum); | |
2975 | count = pmon_makeb64 (value, p, 24, csum); | |
2976 | p += count; | |
2977 | *recsize += count; | |
2978 | } | |
2979 | *inptr += 3; | |
2980 | } | |
c906108c | 2981 | } |
c906108c SS |
2982 | |
2983 | *outbuf = p; | |
2984 | return; | |
2985 | } | |
2986 | ||
2987 | static int | |
fba45db2 | 2988 | pmon_check_ack (char *mesg) |
c906108c SS |
2989 | { |
2990 | #if defined(DOETXACK) | |
2991 | int c; | |
2992 | ||
2993 | if (!tftp_in_use) | |
2994 | { | |
2cd58942 | 2995 | c = serial_readchar (udp_in_use ? udp_desc : mips_desc, |
688991e6 | 2996 | remote_timeout); |
c906108c SS |
2997 | if ((c == SERIAL_TIMEOUT) || (c != 0x06)) |
2998 | { | |
2999 | fprintf_unfiltered (gdb_stderr, | |
3000 | "Failed to receive valid ACK for %s\n", mesg); | |
c5aa993b | 3001 | return (-1); /* terminate the download */ |
c906108c SS |
3002 | } |
3003 | } | |
3004 | #endif /* DOETXACK */ | |
c5aa993b | 3005 | return (0); |
c906108c SS |
3006 | } |
3007 | ||
3008 | /* pmon_download - Send a sequence of characters to the PMON download port, | |
3009 | which is either a serial port or a UDP socket. */ | |
3010 | ||
3011 | static void | |
fba45db2 | 3012 | pmon_start_download (void) |
c906108c SS |
3013 | { |
3014 | if (tftp_in_use) | |
3015 | { | |
3016 | /* Create the temporary download file. */ | |
3017 | if ((tftp_file = fopen (tftp_localname, "w")) == NULL) | |
3018 | perror_with_name (tftp_localname); | |
3019 | } | |
3020 | else | |
3021 | { | |
3022 | mips_send_command (udp_in_use ? LOAD_CMD_UDP : LOAD_CMD, 0); | |
3023 | mips_expect ("Downloading from "); | |
3024 | mips_expect (udp_in_use ? "udp" : "tty0"); | |
3025 | mips_expect (", ^C to abort\r\n"); | |
3026 | } | |
3027 | } | |
3028 | ||
3029 | static int | |
3030 | mips_expect_download (char *string) | |
3031 | { | |
3032 | if (!mips_expect (string)) | |
3033 | { | |
3034 | fprintf_unfiltered (gdb_stderr, "Load did not complete successfully.\n"); | |
3035 | if (tftp_in_use) | |
3036 | remove (tftp_localname); /* Remove temporary file */ | |
3037 | return 0; | |
3038 | } | |
3039 | else | |
3040 | return 1; | |
3041 | } | |
3042 | ||
688991e6 AC |
3043 | static void |
3044 | pmon_check_entry_address (char *entry_address, int final) | |
3045 | { | |
3046 | char hexnumber[9]; /* includes '\0' space */ | |
3047 | mips_expect_timeout (entry_address, tftp_in_use ? 15 : remote_timeout); | |
3048 | sprintf (hexnumber, "%x", final); | |
3049 | mips_expect (hexnumber); | |
3050 | mips_expect ("\r\n"); | |
3051 | } | |
3052 | ||
3053 | static int | |
3054 | pmon_check_total (int bintotal) | |
3055 | { | |
3056 | char hexnumber[9]; /* includes '\0' space */ | |
3057 | mips_expect ("\r\ntotal = 0x"); | |
3058 | sprintf (hexnumber, "%x", bintotal); | |
3059 | mips_expect (hexnumber); | |
3060 | return mips_expect_download (" bytes\r\n"); | |
3061 | } | |
3062 | ||
c906108c | 3063 | static void |
fba45db2 | 3064 | pmon_end_download (int final, int bintotal) |
c906108c | 3065 | { |
c5aa993b | 3066 | char hexnumber[9]; /* includes '\0' space */ |
c906108c SS |
3067 | |
3068 | if (tftp_in_use) | |
3069 | { | |
3070 | static char *load_cmd_prefix = "load -b -s "; | |
3071 | char *cmd; | |
3072 | struct stat stbuf; | |
3073 | ||
3074 | /* Close off the temporary file containing the load data. */ | |
3075 | fclose (tftp_file); | |
3076 | tftp_file = NULL; | |
3077 | ||
3078 | /* Make the temporary file readable by the world. */ | |
3079 | if (stat (tftp_localname, &stbuf) == 0) | |
3080 | chmod (tftp_localname, stbuf.st_mode | S_IROTH); | |
3081 | ||
3082 | /* Must reinitialize the board to prevent PMON from crashing. */ | |
3083 | mips_send_command ("initEther\r", -1); | |
3084 | ||
3085 | /* Send the load command. */ | |
3086 | cmd = xmalloc (strlen (load_cmd_prefix) + strlen (tftp_name) + 2); | |
3087 | strcpy (cmd, load_cmd_prefix); | |
3088 | strcat (cmd, tftp_name); | |
3089 | strcat (cmd, "\r"); | |
3090 | mips_send_command (cmd, 0); | |
b8c9b27d | 3091 | xfree (cmd); |
c906108c SS |
3092 | if (!mips_expect_download ("Downloading from ")) |
3093 | return; | |
3094 | if (!mips_expect_download (tftp_name)) | |
3095 | return; | |
3096 | if (!mips_expect_download (", ^C to abort\r\n")) | |
3097 | return; | |
3098 | } | |
3099 | ||
3100 | /* Wait for the stuff that PMON prints after the load has completed. | |
3101 | The timeout value for use in the tftp case (15 seconds) was picked | |
3102 | arbitrarily but might be too small for really large downloads. FIXME. */ | |
688991e6 | 3103 | switch (mips_monitor) |
c906108c | 3104 | { |
688991e6 AC |
3105 | case MON_LSI: |
3106 | pmon_check_ack ("termination"); | |
3107 | pmon_check_entry_address ("Entry address is ", final); | |
3108 | if (!pmon_check_total (bintotal)) | |
3109 | return; | |
3110 | break; | |
3111 | default: | |
3112 | pmon_check_entry_address ("Entry Address = ", final); | |
c906108c | 3113 | pmon_check_ack ("termination"); |
688991e6 AC |
3114 | if (!pmon_check_total (bintotal)) |
3115 | return; | |
3116 | break; | |
c906108c | 3117 | } |
c906108c SS |
3118 | |
3119 | if (tftp_in_use) | |
3120 | remove (tftp_localname); /* Remove temporary file */ | |
3121 | } | |
3122 | ||
3123 | static void | |
fba45db2 | 3124 | pmon_download (char *buffer, int length) |
c906108c SS |
3125 | { |
3126 | if (tftp_in_use) | |
3127 | fwrite (buffer, 1, length, tftp_file); | |
3128 | else | |
2cd58942 | 3129 | serial_write (udp_in_use ? udp_desc : mips_desc, buffer, length); |
c906108c SS |
3130 | } |
3131 | ||
3132 | static void | |
fba45db2 | 3133 | pmon_load_fast (char *file) |
c906108c SS |
3134 | { |
3135 | bfd *abfd; | |
3136 | asection *s; | |
3137 | unsigned char *binbuf; | |
3138 | char *buffer; | |
3139 | int reclen; | |
3140 | unsigned int csum = 0; | |
3141 | int hashmark = !tftp_in_use; | |
3142 | int bintotal = 0; | |
3143 | int final = 0; | |
3144 | int finished = 0; | |
3145 | ||
c5aa993b JM |
3146 | buffer = (char *) xmalloc (MAXRECSIZE + 1); |
3147 | binbuf = (unsigned char *) xmalloc (BINCHUNK); | |
c906108c | 3148 | |
c5aa993b | 3149 | abfd = bfd_openr (file, 0); |
c906108c | 3150 | if (!abfd) |
c5aa993b JM |
3151 | { |
3152 | printf_filtered ("Unable to open file %s\n", file); | |
3153 | return; | |
3154 | } | |
c906108c | 3155 | |
c5aa993b JM |
3156 | if (bfd_check_format (abfd, bfd_object) == 0) |
3157 | { | |
3158 | printf_filtered ("File is not an object file\n"); | |
3159 | return; | |
3160 | } | |
c906108c SS |
3161 | |
3162 | /* Setup the required download state: */ | |
3163 | mips_send_command ("set dlproto etxack\r", -1); | |
3164 | mips_send_command ("set dlecho off\r", -1); | |
3165 | /* NOTE: We get a "cannot set variable" message if the variable is | |
3166 | already defined to have the argument we give. The code doesn't | |
3167 | care, since it just scans to the next prompt anyway. */ | |
3168 | /* Start the download: */ | |
c5aa993b JM |
3169 | pmon_start_download (); |
3170 | ||
c906108c | 3171 | /* Zero the checksum */ |
c5aa993b JM |
3172 | sprintf (buffer, "/Kxx\n"); |
3173 | reclen = strlen (buffer); | |
c906108c | 3174 | pmon_download (buffer, reclen); |
c5aa993b | 3175 | finished = pmon_check_ack ("/Kxx"); |
c906108c SS |
3176 | |
3177 | for (s = abfd->sections; s && !finished; s = s->next) | |
c5aa993b JM |
3178 | if (s->flags & SEC_LOAD) /* only deal with loadable sections */ |
3179 | { | |
2c500098 AM |
3180 | bintotal += bfd_get_section_size (s); |
3181 | final = (s->vma + bfd_get_section_size (s)); | |
c5aa993b JM |
3182 | |
3183 | printf_filtered ("%s\t: 0x%4x .. 0x%4x ", s->name, (unsigned int) s->vma, | |
2c500098 | 3184 | (unsigned int) (s->vma + bfd_get_section_size (s))); |
c5aa993b JM |
3185 | gdb_flush (gdb_stdout); |
3186 | ||
3187 | /* Output the starting address */ | |
3188 | sprintf (buffer, "/A"); | |
3189 | reclen = pmon_makeb64 (s->vma, &buffer[2], 36, &csum); | |
3190 | buffer[2 + reclen] = '\n'; | |
3191 | buffer[3 + reclen] = '\0'; | |
3192 | reclen += 3; /* for the initial escape code and carriage return */ | |
3193 | pmon_download (buffer, reclen); | |
3194 | finished = pmon_check_ack ("/A"); | |
3195 | ||
3196 | if (!finished) | |
3197 | { | |
3198 | unsigned int binamount; | |
3199 | unsigned int zerofill = 0; | |
3200 | char *bp = buffer; | |
3201 | unsigned int i; | |
3202 | ||
3203 | reclen = 0; | |
3204 | ||
2c500098 AM |
3205 | for (i = 0; |
3206 | i < bfd_get_section_size (s) && !finished; | |
3207 | i += binamount) | |
c5aa993b JM |
3208 | { |
3209 | int binptr = 0; | |
3210 | ||
2c500098 | 3211 | binamount = min (BINCHUNK, bfd_get_section_size (s) - i); |
c5aa993b JM |
3212 | |
3213 | bfd_get_section_contents (abfd, s, binbuf, i, binamount); | |
3214 | ||
3215 | /* This keeps a rolling checksum, until we decide to output | |
3216 | the line: */ | |
3217 | for (; ((binamount - binptr) > 0);) | |
3218 | { | |
1fa79fac MS |
3219 | pmon_make_fastrec (&bp, binbuf, &binptr, binamount, |
3220 | &reclen, &csum, &zerofill); | |
c5aa993b JM |
3221 | if (reclen >= (MAXRECSIZE - CHECKSIZE)) |
3222 | { | |
3223 | reclen = pmon_checkset (reclen, &bp, &csum); | |
3224 | pmon_download (buffer, reclen); | |
3225 | finished = pmon_check_ack ("data record"); | |
3226 | if (finished) | |
3227 | { | |
3228 | zerofill = 0; /* do not transmit pending zerofills */ | |
3229 | break; | |
3230 | } | |
3231 | ||
9a4105ab AC |
3232 | if (deprecated_ui_load_progress_hook) |
3233 | deprecated_ui_load_progress_hook (s->name, i); | |
7829b833 | 3234 | |
c5aa993b JM |
3235 | if (hashmark) |
3236 | { | |
3237 | putchar_unfiltered ('#'); | |
3238 | gdb_flush (gdb_stdout); | |
3239 | } | |
3240 | ||
3241 | bp = buffer; | |
3242 | reclen = 0; /* buffer processed */ | |
3243 | } | |
3244 | } | |
3245 | } | |
3246 | ||
3247 | /* Ensure no out-standing zerofill requests: */ | |
3248 | if (zerofill != 0) | |
3249 | reclen = pmon_zeroset (reclen, &bp, &zerofill, &csum); | |
3250 | ||
3251 | /* and then flush the line: */ | |
3252 | if (reclen > 0) | |
3253 | { | |
3254 | reclen = pmon_checkset (reclen, &bp, &csum); | |
3255 | /* Currently pmon_checkset outputs the line terminator by | |
3256 | default, so we write out the buffer so far: */ | |
3257 | pmon_download (buffer, reclen); | |
3258 | finished = pmon_check_ack ("record remnant"); | |
3259 | } | |
3260 | } | |
3261 | ||
3262 | putchar_unfiltered ('\n'); | |
3263 | } | |
c906108c SS |
3264 | |
3265 | /* Terminate the transfer. We know that we have an empty output | |
3266 | buffer at this point. */ | |
c5aa993b | 3267 | sprintf (buffer, "/E/E\n"); /* include dummy padding characters */ |
c906108c SS |
3268 | reclen = strlen (buffer); |
3269 | pmon_download (buffer, reclen); | |
3270 | ||
c5aa993b JM |
3271 | if (finished) |
3272 | { /* Ignore the termination message: */ | |
2cd58942 | 3273 | serial_flush_input (udp_in_use ? udp_desc : mips_desc); |
c5aa993b JM |
3274 | } |
3275 | else | |
3276 | { /* Deal with termination message: */ | |
3277 | pmon_end_download (final, bintotal); | |
3278 | } | |
c906108c SS |
3279 | |
3280 | return; | |
3281 | } | |
3282 | ||
3283 | /* mips_load -- download a file. */ | |
3284 | ||
3285 | static void | |
fba45db2 | 3286 | mips_load (char *file, int from_tty) |
c906108c | 3287 | { |
fb14de7b UW |
3288 | struct regcache *regcache; |
3289 | ||
c906108c SS |
3290 | /* Get the board out of remote debugging mode. */ |
3291 | if (mips_exit_debug ()) | |
3292 | error ("mips_load: Couldn't get into monitor mode."); | |
3293 | ||
3294 | if (mips_monitor != MON_IDT) | |
c5aa993b | 3295 | pmon_load_fast (file); |
c906108c | 3296 | else |
c5aa993b | 3297 | mips_load_srec (file); |
c906108c SS |
3298 | |
3299 | mips_initialize (); | |
3300 | ||
3301 | /* Finally, make the PC point at the start address */ | |
fb14de7b | 3302 | regcache = get_current_regcache (); |
c906108c SS |
3303 | if (mips_monitor != MON_IDT) |
3304 | { | |
3305 | /* Work around problem where PMON monitor updates the PC after a load | |
c5aa993b | 3306 | to a different value than GDB thinks it has. The following ensures |
fb14de7b | 3307 | that the regcache_write_pc() WILL update the PC value: */ |
a624e111 | 3308 | regcache_invalidate (regcache, |
97b0f3e2 | 3309 | mips_regnum (get_regcache_arch (regcache))->pc); |
c906108c SS |
3310 | } |
3311 | if (exec_bfd) | |
fb14de7b | 3312 | regcache_write_pc (regcache, bfd_get_start_address (exec_bfd)); |
8eeafb51 | 3313 | } |
c906108c | 3314 | |
8eeafb51 KB |
3315 | /* Check to see if a thread is still alive. */ |
3316 | ||
3317 | static int | |
3318 | mips_thread_alive (struct target_ops *ops, ptid_t ptid) | |
3319 | { | |
3320 | if (ptid_equal (ptid, remote_mips_ptid)) | |
3321 | /* The monitor's task is always alive. */ | |
3322 | return 1; | |
c906108c | 3323 | |
8eeafb51 | 3324 | return 0; |
c906108c SS |
3325 | } |
3326 | ||
8eeafb51 KB |
3327 | /* Convert a thread ID to a string. Returns the string in a static |
3328 | buffer. */ | |
3329 | ||
3330 | static char * | |
3331 | mips_pid_to_str (struct target_ops *ops, ptid_t ptid) | |
3332 | { | |
3333 | static char buf[64]; | |
3334 | ||
3335 | if (ptid_equal (ptid, remote_mips_ptid)) | |
3336 | { | |
3337 | xsnprintf (buf, sizeof buf, "Thread <main>"); | |
3338 | return buf; | |
3339 | } | |
3340 | ||
3341 | return normal_pid_to_str (ptid); | |
3342 | } | |
c906108c SS |
3343 | |
3344 | /* Pass the command argument as a packet to PMON verbatim. */ | |
3345 | ||
3346 | static void | |
fba45db2 | 3347 | pmon_command (char *args, int from_tty) |
c906108c SS |
3348 | { |
3349 | char buf[DATA_MAXLEN + 1]; | |
3350 | int rlen; | |
3351 | ||
3352 | sprintf (buf, "0x0 %s", args); | |
3353 | mips_send_packet (buf, 1); | |
3354 | printf_filtered ("Send packet: %s\n", buf); | |
3355 | ||
3356 | rlen = mips_receive_packet (buf, 1, mips_receive_wait); | |
3357 | buf[rlen] = '\0'; | |
3358 | printf_filtered ("Received packet: %s\n", buf); | |
3359 | } | |
3360 | \f | |
a78f21af AC |
3361 | extern initialize_file_ftype _initialize_remote_mips; /* -Wmissing-prototypes */ |
3362 | ||
c906108c | 3363 | void |
fba45db2 | 3364 | _initialize_remote_mips (void) |
c906108c SS |
3365 | { |
3366 | /* Initialize the fields in mips_ops that are common to all four targets. */ | |
3367 | mips_ops.to_longname = "Remote MIPS debugging over serial line"; | |
3368 | mips_ops.to_close = mips_close; | |
3369 | mips_ops.to_detach = mips_detach; | |
3370 | mips_ops.to_resume = mips_resume; | |
3371 | mips_ops.to_fetch_registers = mips_fetch_registers; | |
3372 | mips_ops.to_store_registers = mips_store_registers; | |
3373 | mips_ops.to_prepare_to_store = mips_prepare_to_store; | |
c8e73a31 | 3374 | mips_ops.deprecated_xfer_memory = mips_xfer_memory; |
c906108c SS |
3375 | mips_ops.to_files_info = mips_files_info; |
3376 | mips_ops.to_insert_breakpoint = mips_insert_breakpoint; | |
3377 | mips_ops.to_remove_breakpoint = mips_remove_breakpoint; | |
546143b6 AC |
3378 | mips_ops.to_insert_watchpoint = mips_insert_watchpoint; |
3379 | mips_ops.to_remove_watchpoint = mips_remove_watchpoint; | |
3380 | mips_ops.to_stopped_by_watchpoint = mips_stopped_by_watchpoint; | |
3381 | mips_ops.to_can_use_hw_breakpoint = mips_can_use_watchpoint; | |
c906108c SS |
3382 | mips_ops.to_kill = mips_kill; |
3383 | mips_ops.to_load = mips_load; | |
3384 | mips_ops.to_create_inferior = mips_create_inferior; | |
3385 | mips_ops.to_mourn_inferior = mips_mourn_inferior; | |
8eeafb51 KB |
3386 | mips_ops.to_thread_alive = mips_thread_alive; |
3387 | mips_ops.to_pid_to_str = mips_pid_to_str; | |
49d03eab | 3388 | mips_ops.to_log_command = serial_log_command; |
c906108c | 3389 | mips_ops.to_stratum = process_stratum; |
c35b1492 PA |
3390 | mips_ops.to_has_all_memory = default_child_has_all_memory; |
3391 | mips_ops.to_has_memory = default_child_has_memory; | |
3392 | mips_ops.to_has_stack = default_child_has_stack; | |
3393 | mips_ops.to_has_registers = default_child_has_registers; | |
3394 | mips_ops.to_has_execution = default_child_has_execution; | |
c906108c SS |
3395 | mips_ops.to_magic = OPS_MAGIC; |
3396 | ||
3397 | /* Copy the common fields to all four target vectors. */ | |
3398 | pmon_ops = ddb_ops = lsi_ops = mips_ops; | |
3399 | ||
3400 | /* Initialize target-specific fields in the target vectors. */ | |
3401 | mips_ops.to_shortname = "mips"; | |
3402 | mips_ops.to_doc = "\ | |
3403 | Debug a board using the MIPS remote debugging protocol over a serial line.\n\ | |
3404 | The argument is the device it is connected to or, if it contains a colon,\n\ | |
3405 | HOST:PORT to access a board over a network"; | |
3406 | mips_ops.to_open = mips_open; | |
3407 | mips_ops.to_wait = mips_wait; | |
3408 | ||
3409 | pmon_ops.to_shortname = "pmon"; | |
c5aa993b | 3410 | pmon_ops.to_doc = "\ |
c906108c SS |
3411 | Debug a board using the PMON MIPS remote debugging protocol over a serial\n\ |
3412 | line. The argument is the device it is connected to or, if it contains a\n\ | |
3413 | colon, HOST:PORT to access a board over a network"; | |
3414 | pmon_ops.to_open = pmon_open; | |
3415 | pmon_ops.to_wait = mips_wait; | |
3416 | ||
3417 | ddb_ops.to_shortname = "ddb"; | |
3418 | ddb_ops.to_doc = "\ | |
3419 | Debug a board using the PMON MIPS remote debugging protocol over a serial\n\ | |
3420 | line. The first argument is the device it is connected to or, if it contains\n\ | |
3421 | a colon, HOST:PORT to access a board over a network. The optional second\n\ | |
3422 | parameter is the temporary file in the form HOST:FILENAME to be used for\n\ | |
3423 | TFTP downloads to the board. The optional third parameter is the local name\n\ | |
3424 | of the TFTP temporary file, if it differs from the filename seen by the board."; | |
3425 | ddb_ops.to_open = ddb_open; | |
3426 | ddb_ops.to_wait = mips_wait; | |
3427 | ||
3428 | lsi_ops.to_shortname = "lsi"; | |
3429 | lsi_ops.to_doc = pmon_ops.to_doc; | |
3430 | lsi_ops.to_open = lsi_open; | |
3431 | lsi_ops.to_wait = mips_wait; | |
3432 | ||
3433 | /* Add the targets. */ | |
3434 | add_target (&mips_ops); | |
3435 | add_target (&pmon_ops); | |
3436 | add_target (&ddb_ops); | |
3437 | add_target (&lsi_ops); | |
3438 | ||
85c07804 AC |
3439 | add_setshow_zinteger_cmd ("timeout", no_class, &mips_receive_wait, _("\ |
3440 | Set timeout in seconds for remote MIPS serial I/O."), _("\ | |
3441 | Show timeout in seconds for remote MIPS serial I/O."), NULL, | |
3442 | NULL, | |
3443 | NULL, /* FIXME: i18n: */ | |
3444 | &setlist, &showlist); | |
3445 | ||
3446 | add_setshow_zinteger_cmd ("retransmit-timeout", no_class, | |
3447 | &mips_retransmit_wait, _("\ | |
3448 | Set retransmit timeout in seconds for remote MIPS serial I/O."), _("\ | |
3449 | Show retransmit timeout in seconds for remote MIPS serial I/O."), _("\ | |
c906108c | 3450 | This is the number of seconds to wait for an acknowledgement to a packet\n\ |
85c07804 AC |
3451 | before resending the packet."), |
3452 | NULL, | |
3453 | NULL, /* FIXME: i18n: */ | |
3454 | &setlist, &showlist); | |
3455 | ||
3456 | add_setshow_zinteger_cmd ("syn-garbage-limit", no_class, | |
3457 | &mips_syn_garbage, _("\ | |
3458 | Set the maximum number of characters to ignore when scanning for a SYN."), _("\ | |
3459 | Show the maximum number of characters to ignore when scanning for a SYN."), _("\ | |
c906108c | 3460 | This is the maximum number of characters GDB will ignore when trying to\n\ |
cb1a6d5f AC |
3461 | synchronize with the remote system. A value of -1 means that there is no\n\ |
3462 | limit. (Note that these characters are printed out even though they are\n\ | |
85c07804 AC |
3463 | ignored.)"), |
3464 | NULL, | |
3465 | NULL, /* FIXME: i18n: */ | |
3466 | &setlist, &showlist); | |
c906108c | 3467 | |
4d28ad1e AC |
3468 | add_setshow_string_cmd ("monitor-prompt", class_obscure, |
3469 | &mips_monitor_prompt, _("\ | |
3470 | Set the prompt that GDB expects from the monitor."), _("\ | |
3471 | Show the prompt that GDB expects from the monitor."), NULL, | |
3472 | NULL, | |
3473 | NULL, /* FIXME: i18n: */ | |
3474 | &setlist, &showlist); | |
c906108c | 3475 | |
85c07804 AC |
3476 | add_setshow_zinteger_cmd ("monitor-warnings", class_obscure, |
3477 | &monitor_warnings, _("\ | |
3478 | Set printing of monitor warnings."), _("\ | |
3479 | Show printing of monitor warnings."), _("\ | |
3480 | When enabled, monitor warnings about hardware breakpoints will be displayed."), | |
3481 | NULL, | |
3482 | NULL, /* FIXME: i18n: */ | |
3483 | &setlist, &showlist); | |
c906108c | 3484 | |
24ec834b | 3485 | add_com ("pmon", class_obscure, pmon_command, |
1bedd215 | 3486 | _("Send a packet to PMON (must be in debug mode).")); |
4014092b | 3487 | |
5bf193a2 AC |
3488 | add_setshow_boolean_cmd ("mask-address", no_class, &mask_address_p, _("\ |
3489 | Set zeroing of upper 32 bits of 64-bit addresses when talking to PMON targets."), _("\ | |
3490 | Show zeroing of upper 32 bits of 64-bit addresses when talking to PMON targets."), _("\ | |
3491 | Use \"on\" to enable the masking and \"off\" to disable it."), | |
3492 | NULL, | |
3493 | NULL, /* FIXME: i18n: */ | |
3494 | &setlist, &showlist); | |
8eeafb51 | 3495 | remote_mips_ptid = ptid_build (42000, 0, 42000); |
c906108c | 3496 | } |