Commit | Line | Data |
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c906108c | 1 | /* Remote debugging interface for MIPS remote debugging protocol. |
0a65a603 AC |
2 | |
3 | Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, | |
4 | 2002 Free Software Foundation, Inc. | |
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 | |
13 | the Free Software Foundation; either version 2 of the License, or | |
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 JM |
21 | You should have received a copy of the GNU General Public License |
22 | along with this program; if not, write to the Free Software | |
23 | Foundation, Inc., 59 Temple Place - Suite 330, | |
24 | Boston, MA 02111-1307, USA. */ | |
c906108c SS |
25 | |
26 | #include "defs.h" | |
27 | #include "inferior.h" | |
28 | #include "bfd.h" | |
29 | #include "symfile.h" | |
c906108c SS |
30 | #include "gdbcmd.h" |
31 | #include "gdbcore.h" | |
32 | #include "serial.h" | |
33 | #include "target.h" | |
34 | #include "remote-utils.h" | |
35 | #include "gdb_string.h" | |
ba79cc81 | 36 | #include "gdb_stat.h" |
4e052eda | 37 | #include "regcache.h" |
59d521c1 | 38 | #include <ctype.h> |
56cea623 | 39 | #include "mips-tdep.h" |
c906108c | 40 | \f |
c5aa993b | 41 | |
c906108c SS |
42 | /* Breakpoint types. Values 0, 1, and 2 must agree with the watch |
43 | types passed by breakpoint.c to target_insert_watchpoint. | |
44 | Value 3 is our own invention, and is used for ordinary instruction | |
45 | breakpoints. Value 4 is used to mark an unused watchpoint in tables. */ | |
c5aa993b JM |
46 | enum break_type |
47 | { | |
48 | BREAK_WRITE, /* 0 */ | |
49 | BREAK_READ, /* 1 */ | |
50 | BREAK_ACCESS, /* 2 */ | |
51 | BREAK_FETCH, /* 3 */ | |
52 | BREAK_UNUSED /* 4 */ | |
53 | }; | |
c906108c SS |
54 | |
55 | /* Prototypes for local functions. */ | |
56 | ||
a14ed312 | 57 | static int mips_readchar (int timeout); |
c906108c | 58 | |
a14ed312 KB |
59 | static int mips_receive_header (unsigned char *hdr, int *pgarbage, |
60 | int ch, int timeout); | |
c906108c | 61 | |
a14ed312 KB |
62 | static int mips_receive_trailer (unsigned char *trlr, int *pgarbage, |
63 | int *pch, int timeout); | |
c906108c | 64 | |
a14ed312 KB |
65 | static int mips_cksum (const unsigned char *hdr, |
66 | const unsigned char *data, int len); | |
c906108c | 67 | |
a14ed312 | 68 | static void mips_send_packet (const char *s, int get_ack); |
c906108c | 69 | |
a14ed312 | 70 | static void mips_send_command (const char *cmd, int prompt); |
c906108c | 71 | |
a14ed312 | 72 | static int mips_receive_packet (char *buff, int throw_error, int timeout); |
c906108c | 73 | |
4014092b AC |
74 | static ULONGEST mips_request (int cmd, ULONGEST addr, ULONGEST data, |
75 | int *perr, int timeout, char *buff); | |
c906108c | 76 | |
a14ed312 | 77 | static void mips_initialize (void); |
c906108c | 78 | |
a14ed312 | 79 | static void mips_open (char *name, int from_tty); |
c906108c | 80 | |
a14ed312 | 81 | static void pmon_open (char *name, int from_tty); |
c906108c | 82 | |
a14ed312 | 83 | static void ddb_open (char *name, int from_tty); |
c906108c | 84 | |
a14ed312 | 85 | static void lsi_open (char *name, int from_tty); |
c906108c | 86 | |
a14ed312 | 87 | static void mips_close (int quitting); |
c906108c | 88 | |
a14ed312 | 89 | static void mips_detach (char *args, int from_tty); |
c906108c | 90 | |
39f77062 KB |
91 | static void mips_resume (ptid_t ptid, int step, |
92 | enum target_signal siggnal); | |
c906108c | 93 | |
39f77062 KB |
94 | static ptid_t mips_wait (ptid_t ptid, |
95 | struct target_waitstatus *status); | |
c906108c | 96 | |
a14ed312 | 97 | static int mips_map_regno (int regno); |
c906108c | 98 | |
a14ed312 | 99 | static void mips_fetch_registers (int regno); |
c906108c | 100 | |
a14ed312 | 101 | static void mips_prepare_to_store (void); |
c906108c | 102 | |
a14ed312 | 103 | static void mips_store_registers (int regno); |
c906108c | 104 | |
a14ed312 | 105 | static unsigned int mips_fetch_word (CORE_ADDR addr); |
c906108c | 106 | |
a14ed312 KB |
107 | static int mips_store_word (CORE_ADDR addr, unsigned int value, |
108 | char *old_contents); | |
c906108c | 109 | |
a14ed312 | 110 | static int mips_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, |
29e57380 C |
111 | int write, |
112 | struct mem_attrib *attrib, | |
113 | struct target_ops *target); | |
c906108c | 114 | |
a14ed312 | 115 | static void mips_files_info (struct target_ops *ignore); |
c906108c | 116 | |
a14ed312 | 117 | static void mips_create_inferior (char *execfile, char *args, char **env); |
c906108c | 118 | |
a14ed312 | 119 | static void mips_mourn_inferior (void); |
c906108c | 120 | |
a14ed312 | 121 | static int pmon_makeb64 (unsigned long v, char *p, int n, int *chksum); |
c906108c | 122 | |
a14ed312 KB |
123 | static int pmon_zeroset (int recsize, char **buff, int *amount, |
124 | unsigned int *chksum); | |
c906108c | 125 | |
a14ed312 | 126 | static int pmon_checkset (int recsize, char **buff, int *value); |
c906108c | 127 | |
a14ed312 KB |
128 | static void pmon_make_fastrec (char **outbuf, unsigned char *inbuf, |
129 | int *inptr, int inamount, int *recsize, | |
130 | unsigned int *csum, unsigned int *zerofill); | |
c906108c | 131 | |
a14ed312 | 132 | static int pmon_check_ack (char *mesg); |
c906108c | 133 | |
a14ed312 | 134 | static void pmon_start_download (void); |
c906108c | 135 | |
a14ed312 | 136 | static void pmon_end_download (int final, int bintotal); |
c906108c | 137 | |
a14ed312 | 138 | static void pmon_download (char *buffer, int length); |
c906108c | 139 | |
a14ed312 | 140 | static void pmon_load_fast (char *file); |
c906108c | 141 | |
a14ed312 | 142 | static void mips_load (char *file, int from_tty); |
c906108c | 143 | |
a14ed312 KB |
144 | static int mips_make_srec (char *buffer, int type, CORE_ADDR memaddr, |
145 | unsigned char *myaddr, int len); | |
c906108c | 146 | |
a14ed312 | 147 | static int set_breakpoint (CORE_ADDR addr, int len, enum break_type type); |
c906108c | 148 | |
a14ed312 | 149 | static int clear_breakpoint (CORE_ADDR addr, int len, enum break_type type); |
c906108c | 150 | |
a14ed312 KB |
151 | static int common_breakpoint (int set, CORE_ADDR addr, int len, |
152 | enum break_type type); | |
c906108c SS |
153 | |
154 | /* Forward declarations. */ | |
155 | extern struct target_ops mips_ops; | |
156 | extern struct target_ops pmon_ops; | |
157 | extern struct target_ops ddb_ops; | |
c5aa993b | 158 | \f/* *INDENT-OFF* */ |
c906108c SS |
159 | /* The MIPS remote debugging interface is built on top of a simple |
160 | packet protocol. Each packet is organized as follows: | |
161 | ||
c5aa993b JM |
162 | SYN The first character is always a SYN (ASCII 026, or ^V). SYN |
163 | may not appear anywhere else in the packet. Any time a SYN is | |
164 | seen, a new packet should be assumed to have begun. | |
c906108c SS |
165 | |
166 | TYPE_LEN | |
c5aa993b JM |
167 | This byte contains the upper five bits of the logical length |
168 | of the data section, plus a single bit indicating whether this | |
169 | is a data packet or an acknowledgement. The documentation | |
170 | indicates that this bit is 1 for a data packet, but the actual | |
171 | board uses 1 for an acknowledgement. The value of the byte is | |
172 | 0x40 + (ack ? 0x20 : 0) + (len >> 6) | |
173 | (we always have 0 <= len < 1024). Acknowledgement packets do | |
174 | not carry data, and must have a data length of 0. | |
c906108c SS |
175 | |
176 | LEN1 This byte contains the lower six bits of the logical length of | |
c5aa993b JM |
177 | the data section. The value is |
178 | 0x40 + (len & 0x3f) | |
179 | ||
180 | SEQ This byte contains the six bit sequence number of the packet. | |
181 | The value is | |
182 | 0x40 + seq | |
183 | An acknowlegment packet contains the sequence number of the | |
184 | packet being acknowledged plus 1 modulo 64. Data packets are | |
185 | transmitted in sequence. There may only be one outstanding | |
186 | unacknowledged data packet at a time. The sequence numbers | |
187 | are independent in each direction. If an acknowledgement for | |
188 | the previous packet is received (i.e., an acknowledgement with | |
189 | the sequence number of the packet just sent) the packet just | |
190 | sent should be retransmitted. If no acknowledgement is | |
191 | received within a timeout period, the packet should be | |
192 | retransmitted. This has an unfortunate failure condition on a | |
193 | high-latency line, as a delayed acknowledgement may lead to an | |
194 | endless series of duplicate packets. | |
195 | ||
196 | DATA The actual data bytes follow. The following characters are | |
197 | escaped inline with DLE (ASCII 020, or ^P): | |
198 | SYN (026) DLE S | |
199 | DLE (020) DLE D | |
200 | ^C (003) DLE C | |
201 | ^S (023) DLE s | |
202 | ^Q (021) DLE q | |
203 | The additional DLE characters are not counted in the logical | |
204 | length stored in the TYPE_LEN and LEN1 bytes. | |
c906108c SS |
205 | |
206 | CSUM1 | |
207 | CSUM2 | |
208 | CSUM3 | |
c5aa993b JM |
209 | These bytes contain an 18 bit checksum of the complete |
210 | contents of the packet excluding the SEQ byte and the | |
211 | CSUM[123] bytes. The checksum is simply the twos complement | |
212 | addition of all the bytes treated as unsigned characters. The | |
213 | values of the checksum bytes are: | |
214 | CSUM1: 0x40 + ((cksum >> 12) & 0x3f) | |
215 | CSUM2: 0x40 + ((cksum >> 6) & 0x3f) | |
216 | CSUM3: 0x40 + (cksum & 0x3f) | |
c906108c SS |
217 | |
218 | It happens that the MIPS remote debugging protocol always | |
219 | communicates with ASCII strings. Because of this, this | |
220 | implementation doesn't bother to handle the DLE quoting mechanism, | |
221 | since it will never be required. */ | |
9846de1b | 222 | /* *INDENT-ON* */ |
c906108c | 223 | |
c5aa993b | 224 | |
c906108c SS |
225 | /* The SYN character which starts each packet. */ |
226 | #define SYN '\026' | |
227 | ||
228 | /* The 0x40 used to offset each packet (this value ensures that all of | |
229 | the header and trailer bytes, other than SYN, are printable ASCII | |
230 | characters). */ | |
231 | #define HDR_OFFSET 0x40 | |
232 | ||
233 | /* The indices of the bytes in the packet header. */ | |
234 | #define HDR_INDX_SYN 0 | |
235 | #define HDR_INDX_TYPE_LEN 1 | |
236 | #define HDR_INDX_LEN1 2 | |
237 | #define HDR_INDX_SEQ 3 | |
238 | #define HDR_LENGTH 4 | |
239 | ||
240 | /* The data/ack bit in the TYPE_LEN header byte. */ | |
241 | #define TYPE_LEN_DA_BIT 0x20 | |
242 | #define TYPE_LEN_DATA 0 | |
243 | #define TYPE_LEN_ACK TYPE_LEN_DA_BIT | |
244 | ||
245 | /* How to compute the header bytes. */ | |
246 | #define HDR_SET_SYN(data, len, seq) (SYN) | |
247 | #define HDR_SET_TYPE_LEN(data, len, seq) \ | |
248 | (HDR_OFFSET \ | |
249 | + ((data) ? TYPE_LEN_DATA : TYPE_LEN_ACK) \ | |
250 | + (((len) >> 6) & 0x1f)) | |
251 | #define HDR_SET_LEN1(data, len, seq) (HDR_OFFSET + ((len) & 0x3f)) | |
252 | #define HDR_SET_SEQ(data, len, seq) (HDR_OFFSET + (seq)) | |
253 | ||
254 | /* Check that a header byte is reasonable. */ | |
255 | #define HDR_CHECK(ch) (((ch) & HDR_OFFSET) == HDR_OFFSET) | |
256 | ||
257 | /* Get data from the header. These macros evaluate their argument | |
258 | multiple times. */ | |
259 | #define HDR_IS_DATA(hdr) \ | |
260 | (((hdr)[HDR_INDX_TYPE_LEN] & TYPE_LEN_DA_BIT) == TYPE_LEN_DATA) | |
261 | #define HDR_GET_LEN(hdr) \ | |
262 | ((((hdr)[HDR_INDX_TYPE_LEN] & 0x1f) << 6) + (((hdr)[HDR_INDX_LEN1] & 0x3f))) | |
263 | #define HDR_GET_SEQ(hdr) ((unsigned int)(hdr)[HDR_INDX_SEQ] & 0x3f) | |
264 | ||
265 | /* The maximum data length. */ | |
266 | #define DATA_MAXLEN 1023 | |
267 | ||
268 | /* The trailer offset. */ | |
269 | #define TRLR_OFFSET HDR_OFFSET | |
270 | ||
271 | /* The indices of the bytes in the packet trailer. */ | |
272 | #define TRLR_INDX_CSUM1 0 | |
273 | #define TRLR_INDX_CSUM2 1 | |
274 | #define TRLR_INDX_CSUM3 2 | |
275 | #define TRLR_LENGTH 3 | |
276 | ||
277 | /* How to compute the trailer bytes. */ | |
278 | #define TRLR_SET_CSUM1(cksum) (TRLR_OFFSET + (((cksum) >> 12) & 0x3f)) | |
279 | #define TRLR_SET_CSUM2(cksum) (TRLR_OFFSET + (((cksum) >> 6) & 0x3f)) | |
280 | #define TRLR_SET_CSUM3(cksum) (TRLR_OFFSET + (((cksum) ) & 0x3f)) | |
281 | ||
282 | /* Check that a trailer byte is reasonable. */ | |
283 | #define TRLR_CHECK(ch) (((ch) & TRLR_OFFSET) == TRLR_OFFSET) | |
284 | ||
285 | /* Get data from the trailer. This evaluates its argument multiple | |
286 | times. */ | |
287 | #define TRLR_GET_CKSUM(trlr) \ | |
288 | ((((trlr)[TRLR_INDX_CSUM1] & 0x3f) << 12) \ | |
289 | + (((trlr)[TRLR_INDX_CSUM2] & 0x3f) << 6) \ | |
290 | + ((trlr)[TRLR_INDX_CSUM3] & 0x3f)) | |
291 | ||
292 | /* The sequence number modulos. */ | |
293 | #define SEQ_MODULOS (64) | |
294 | ||
295 | /* PMON commands to load from the serial port or UDP socket. */ | |
296 | #define LOAD_CMD "load -b -s tty0\r" | |
297 | #define LOAD_CMD_UDP "load -b -s udp\r" | |
298 | ||
299 | /* The target vectors for the four different remote MIPS targets. | |
300 | These are initialized with code in _initialize_remote_mips instead | |
301 | of static initializers, to make it easier to extend the target_ops | |
302 | vector later. */ | |
303 | struct target_ops mips_ops, pmon_ops, ddb_ops, lsi_ops; | |
304 | ||
c5aa993b JM |
305 | enum mips_monitor_type |
306 | { | |
307 | /* IDT/SIM monitor being used: */ | |
308 | MON_IDT, | |
309 | /* PMON monitor being used: */ | |
310 | MON_PMON, /* 3.0.83 [COGENT,EB,FP,NET] Algorithmics Ltd. Nov 9 1995 17:19:50 */ | |
311 | MON_DDB, /* 2.7.473 [DDBVR4300,EL,FP,NET] Risq Modular Systems, Thu Jun 6 09:28:40 PDT 1996 */ | |
312 | MON_LSI, /* 4.3.12 [EB,FP], LSI LOGIC Corp. Tue Feb 25 13:22:14 1997 */ | |
313 | /* Last and unused value, for sizing vectors, etc. */ | |
314 | MON_LAST | |
315 | }; | |
c906108c SS |
316 | static enum mips_monitor_type mips_monitor = MON_LAST; |
317 | ||
318 | /* The monitor prompt text. If the user sets the PMON prompt | |
319 | to some new value, the GDB `set monitor-prompt' command must also | |
320 | be used to inform GDB about the expected prompt. Otherwise, GDB | |
321 | will not be able to connect to PMON in mips_initialize(). | |
322 | If the `set monitor-prompt' command is not used, the expected | |
323 | default prompt will be set according the target: | |
c5aa993b JM |
324 | target prompt |
325 | ----- ----- | |
326 | pmon PMON> | |
327 | ddb NEC010> | |
328 | lsi PMON> | |
329 | */ | |
c906108c SS |
330 | static char *mips_monitor_prompt; |
331 | ||
332 | /* Set to 1 if the target is open. */ | |
333 | static int mips_is_open; | |
334 | ||
335 | /* Currently active target description (if mips_is_open == 1) */ | |
336 | static struct target_ops *current_ops; | |
337 | ||
338 | /* Set to 1 while the connection is being initialized. */ | |
339 | static int mips_initializing; | |
340 | ||
341 | /* Set to 1 while the connection is being brought down. */ | |
342 | static int mips_exiting; | |
343 | ||
344 | /* The next sequence number to send. */ | |
345 | static unsigned int mips_send_seq; | |
346 | ||
347 | /* The next sequence number we expect to receive. */ | |
348 | static unsigned int mips_receive_seq; | |
349 | ||
350 | /* The time to wait before retransmitting a packet, in seconds. */ | |
351 | static int mips_retransmit_wait = 3; | |
352 | ||
353 | /* The number of times to try retransmitting a packet before giving up. */ | |
354 | static int mips_send_retries = 10; | |
355 | ||
356 | /* The number of garbage characters to accept when looking for an | |
357 | SYN for the next packet. */ | |
59d521c1 | 358 | static int mips_syn_garbage = 10; |
c906108c SS |
359 | |
360 | /* The time to wait for a packet, in seconds. */ | |
361 | static int mips_receive_wait = 5; | |
362 | ||
363 | /* Set if we have sent a packet to the board but have not yet received | |
364 | a reply. */ | |
365 | static int mips_need_reply = 0; | |
366 | ||
367 | /* Handle used to access serial I/O stream. */ | |
819cc324 | 368 | static struct serial *mips_desc; |
c906108c SS |
369 | |
370 | /* UDP handle used to download files to target. */ | |
819cc324 | 371 | static struct serial *udp_desc; |
c906108c SS |
372 | static int udp_in_use; |
373 | ||
374 | /* TFTP filename used to download files to DDB board, in the form | |
375 | host:filename. */ | |
376 | static char *tftp_name; /* host:filename */ | |
377 | static char *tftp_localname; /* filename portion of above */ | |
378 | static int tftp_in_use; | |
379 | static FILE *tftp_file; | |
380 | ||
381 | /* Counts the number of times the user tried to interrupt the target (usually | |
382 | via ^C. */ | |
383 | static int interrupt_count; | |
384 | ||
385 | /* If non-zero, means that the target is running. */ | |
386 | static int mips_wait_flag = 0; | |
387 | ||
388 | /* If non-zero, monitor supports breakpoint commands. */ | |
d4f3574e | 389 | static int monitor_supports_breakpoints = 0; |
c906108c SS |
390 | |
391 | /* Data cache header. */ | |
392 | ||
c5aa993b | 393 | #if 0 /* not used (yet?) */ |
c906108c SS |
394 | static DCACHE *mips_dcache; |
395 | #endif | |
396 | ||
397 | /* Non-zero means that we've just hit a read or write watchpoint */ | |
398 | static int hit_watchpoint; | |
399 | ||
400 | /* Table of breakpoints/watchpoints (used only on LSI PMON target). | |
401 | The table is indexed by a breakpoint number, which is an integer | |
402 | from 0 to 255 returned by the LSI PMON when a breakpoint is set. | |
c5aa993b | 403 | */ |
c906108c SS |
404 | #define MAX_LSI_BREAKPOINTS 256 |
405 | struct lsi_breakpoint_info | |
c5aa993b JM |
406 | { |
407 | enum break_type type; /* type of breakpoint */ | |
408 | CORE_ADDR addr; /* address of breakpoint */ | |
409 | int len; /* length of region being watched */ | |
410 | unsigned long value; /* value to watch */ | |
411 | } | |
412 | lsi_breakpoints[MAX_LSI_BREAKPOINTS]; | |
c906108c SS |
413 | |
414 | /* Error/warning codes returned by LSI PMON for breakpoint commands. | |
415 | Warning values may be ORed together; error values may not. */ | |
c5aa993b JM |
416 | #define W_WARN 0x100 /* This bit is set if the error code is a warning */ |
417 | #define W_MSK 0x101 /* warning: Range feature is supported via mask */ | |
418 | #define W_VAL 0x102 /* warning: Value check is not supported in hardware */ | |
419 | #define W_QAL 0x104 /* warning: Requested qualifiers are not supported in hardware */ | |
420 | ||
421 | #define E_ERR 0x200 /* This bit is set if the error code is an error */ | |
422 | #define E_BPT 0x200 /* error: No such breakpoint number */ | |
423 | #define E_RGE 0x201 /* error: Range is not supported */ | |
424 | #define E_QAL 0x202 /* error: The requested qualifiers can not be used */ | |
425 | #define E_OUT 0x203 /* error: Out of hardware resources */ | |
426 | #define E_NON 0x204 /* error: Hardware breakpoint not supported */ | |
c906108c SS |
427 | |
428 | struct lsi_error | |
c5aa993b JM |
429 | { |
430 | int code; /* error code */ | |
431 | char *string; /* string associated with this code */ | |
432 | }; | |
c906108c SS |
433 | |
434 | struct lsi_error lsi_warning_table[] = | |
435 | { | |
c5aa993b JM |
436 | {W_MSK, "Range feature is supported via mask"}, |
437 | {W_VAL, "Value check is not supported in hardware"}, | |
438 | {W_QAL, "Requested qualifiers are not supported in hardware"}, | |
439 | {0, NULL} | |
c906108c SS |
440 | }; |
441 | ||
442 | struct lsi_error lsi_error_table[] = | |
c5aa993b JM |
443 | { |
444 | {E_BPT, "No such breakpoint number"}, | |
445 | {E_RGE, "Range is not supported"}, | |
446 | {E_QAL, "The requested qualifiers can not be used"}, | |
447 | {E_OUT, "Out of hardware resources"}, | |
448 | {E_NON, "Hardware breakpoint not supported"}, | |
449 | {0, NULL} | |
c906108c SS |
450 | }; |
451 | ||
452 | /* Set to 1 with the 'set monitor-warnings' command to enable printing | |
453 | of warnings returned by PMON when hardware breakpoints are used. */ | |
454 | static int monitor_warnings; | |
455 | ||
456 | ||
457 | static void | |
fba45db2 | 458 | close_ports (void) |
c906108c SS |
459 | { |
460 | mips_is_open = 0; | |
2cd58942 | 461 | serial_close (mips_desc); |
c906108c SS |
462 | |
463 | if (udp_in_use) | |
464 | { | |
2cd58942 | 465 | serial_close (udp_desc); |
c906108c SS |
466 | udp_in_use = 0; |
467 | } | |
468 | tftp_in_use = 0; | |
469 | } | |
c5aa993b | 470 | |
c906108c SS |
471 | /* Handle low-level error that we can't recover from. Note that just |
472 | error()ing out from target_wait or some such low-level place will cause | |
473 | all hell to break loose--the rest of GDB will tend to get left in an | |
474 | inconsistent state. */ | |
475 | ||
476 | static NORETURN void | |
c5aa993b | 477 | mips_error (char *string,...) |
c906108c SS |
478 | { |
479 | va_list args; | |
480 | ||
c906108c | 481 | va_start (args, string); |
c5aa993b | 482 | |
c906108c | 483 | target_terminal_ours (); |
c5aa993b | 484 | wrap_here (""); /* Force out any buffered output */ |
c906108c SS |
485 | gdb_flush (gdb_stdout); |
486 | if (error_pre_print) | |
ab4e3d93 | 487 | fputs_filtered (error_pre_print, gdb_stderr); |
c906108c SS |
488 | vfprintf_filtered (gdb_stderr, string, args); |
489 | fprintf_filtered (gdb_stderr, "\n"); | |
490 | va_end (args); | |
491 | gdb_flush (gdb_stderr); | |
492 | ||
493 | /* Clean up in such a way that mips_close won't try to talk to the | |
494 | board (it almost surely won't work since we weren't able to talk to | |
495 | it). */ | |
496 | close_ports (); | |
497 | ||
498 | printf_unfiltered ("Ending remote MIPS debugging.\n"); | |
499 | target_mourn_inferior (); | |
500 | ||
b5a2688f | 501 | throw_exception (RETURN_ERROR); |
c906108c SS |
502 | } |
503 | ||
504 | /* putc_readable - print a character, displaying non-printable chars in | |
505 | ^x notation or in hex. */ | |
506 | ||
507 | static void | |
fba45db2 | 508 | fputc_readable (int ch, struct ui_file *file) |
c906108c SS |
509 | { |
510 | if (ch == '\n') | |
9846de1b | 511 | fputc_unfiltered ('\n', file); |
c906108c | 512 | else if (ch == '\r') |
9846de1b | 513 | fprintf_unfiltered (file, "\\r"); |
c5aa993b | 514 | else if (ch < 0x20) /* ASCII control character */ |
9846de1b | 515 | fprintf_unfiltered (file, "^%c", ch + '@'); |
c5aa993b | 516 | else if (ch >= 0x7f) /* non-ASCII characters (rubout or greater) */ |
9846de1b | 517 | fprintf_unfiltered (file, "[%02x]", ch & 0xff); |
c906108c | 518 | else |
9846de1b | 519 | fputc_unfiltered (ch, file); |
c906108c SS |
520 | } |
521 | ||
522 | ||
523 | /* puts_readable - print a string, displaying non-printable chars in | |
524 | ^x notation or in hex. */ | |
525 | ||
526 | static void | |
98691afe | 527 | fputs_readable (const char *string, struct ui_file *file) |
c906108c SS |
528 | { |
529 | int c; | |
530 | ||
531 | while ((c = *string++) != '\0') | |
9846de1b | 532 | fputc_readable (c, file); |
c906108c SS |
533 | } |
534 | ||
535 | ||
536 | /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if | |
537 | timed out. TIMEOUT specifies timeout value in seconds. | |
c5aa993b | 538 | */ |
c906108c | 539 | |
a78f21af | 540 | static int |
98691afe | 541 | mips_expect_timeout (const char *string, int timeout) |
c906108c | 542 | { |
98691afe | 543 | const char *p = string; |
c906108c SS |
544 | |
545 | if (remote_debug) | |
546 | { | |
9846de1b JM |
547 | fprintf_unfiltered (gdb_stdlog, "Expected \""); |
548 | fputs_readable (string, gdb_stdlog); | |
549 | fprintf_unfiltered (gdb_stdlog, "\", got \""); | |
c906108c SS |
550 | } |
551 | ||
8edbea78 | 552 | immediate_quit++; |
c906108c SS |
553 | while (1) |
554 | { | |
555 | int c; | |
556 | ||
2cd58942 AC |
557 | /* Must use serial_readchar() here cuz mips_readchar would get |
558 | confused if we were waiting for the mips_monitor_prompt... */ | |
c906108c | 559 | |
2cd58942 | 560 | c = serial_readchar (mips_desc, timeout); |
c906108c SS |
561 | |
562 | if (c == SERIAL_TIMEOUT) | |
563 | { | |
564 | if (remote_debug) | |
9846de1b | 565 | fprintf_unfiltered (gdb_stdlog, "\": FAIL\n"); |
c906108c SS |
566 | return 0; |
567 | } | |
568 | ||
569 | if (remote_debug) | |
9846de1b | 570 | fputc_readable (c, gdb_stdlog); |
c906108c SS |
571 | |
572 | if (c == *p++) | |
c5aa993b | 573 | { |
c906108c SS |
574 | if (*p == '\0') |
575 | { | |
8edbea78 | 576 | immediate_quit--; |
c906108c | 577 | if (remote_debug) |
9846de1b | 578 | fprintf_unfiltered (gdb_stdlog, "\": OK\n"); |
c906108c SS |
579 | return 1; |
580 | } | |
581 | } | |
582 | else | |
583 | { | |
584 | p = string; | |
585 | if (c == *p) | |
586 | p++; | |
587 | } | |
588 | } | |
589 | } | |
590 | ||
591 | /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if | |
592 | timed out. The timeout value is hard-coded to 2 seconds. Use | |
593 | mips_expect_timeout if a different timeout value is needed. | |
c5aa993b | 594 | */ |
c906108c | 595 | |
a78f21af | 596 | static int |
98691afe | 597 | mips_expect (const char *string) |
c906108c | 598 | { |
688991e6 | 599 | return mips_expect_timeout (string, remote_timeout); |
c906108c SS |
600 | } |
601 | ||
602 | /* Read the required number of characters into the given buffer (which | |
603 | is assumed to be large enough). The only failure is a timeout. */ | |
a78f21af | 604 | static int |
fba45db2 | 605 | mips_getstring (char *string, int n) |
c906108c SS |
606 | { |
607 | char *p = string; | |
608 | int c; | |
609 | ||
8edbea78 | 610 | immediate_quit++; |
c906108c SS |
611 | while (n > 0) |
612 | { | |
2cd58942 | 613 | c = serial_readchar (mips_desc, remote_timeout); |
c906108c | 614 | |
c5aa993b JM |
615 | if (c == SERIAL_TIMEOUT) |
616 | { | |
617 | fprintf_unfiltered (gdb_stderr, | |
618 | "Failed to read %d characters from target (TIMEOUT)\n", n); | |
8edbea78 | 619 | immediate_quit--; |
c5aa993b JM |
620 | return 0; |
621 | } | |
c906108c SS |
622 | |
623 | *p++ = c; | |
624 | n--; | |
625 | } | |
626 | ||
8edbea78 | 627 | immediate_quit--; |
c906108c SS |
628 | return 1; |
629 | } | |
630 | ||
631 | /* Read a character from the remote, aborting on error. Returns | |
2cd58942 AC |
632 | SERIAL_TIMEOUT on timeout (since that's what serial_readchar() |
633 | returns). FIXME: If we see the string mips_monitor_prompt from the | |
634 | board, then we are debugging on the main console port, and we have | |
635 | somehow dropped out of remote debugging mode. In this case, we | |
636 | automatically go back in to remote debugging mode. This is a hack, | |
637 | put in because I can't find any way for a program running on the | |
638 | remote board to terminate without also ending remote debugging | |
c906108c SS |
639 | mode. I assume users won't have any trouble with this; for one |
640 | thing, the IDT documentation generally assumes that the remote | |
641 | debugging port is not the console port. This is, however, very | |
642 | convenient for DejaGnu when you only have one connected serial | |
643 | port. */ | |
644 | ||
645 | static int | |
fba45db2 | 646 | mips_readchar (int timeout) |
c906108c SS |
647 | { |
648 | int ch; | |
649 | static int state = 0; | |
650 | int mips_monitor_prompt_len = strlen (mips_monitor_prompt); | |
651 | ||
c906108c SS |
652 | { |
653 | int i; | |
654 | ||
655 | i = timeout; | |
656 | if (i == -1 && watchdog > 0) | |
c5aa993b | 657 | i = watchdog; |
c906108c | 658 | } |
c906108c SS |
659 | |
660 | if (state == mips_monitor_prompt_len) | |
661 | timeout = 1; | |
2cd58942 | 662 | ch = serial_readchar (mips_desc, timeout); |
7a292a7a | 663 | |
c5aa993b | 664 | if (ch == SERIAL_TIMEOUT && timeout == -1) /* Watchdog went off */ |
c906108c SS |
665 | { |
666 | target_mourn_inferior (); | |
667 | error ("Watchdog has expired. Target detached.\n"); | |
668 | } | |
7a292a7a | 669 | |
c906108c SS |
670 | if (ch == SERIAL_EOF) |
671 | mips_error ("End of file from remote"); | |
672 | if (ch == SERIAL_ERROR) | |
673 | mips_error ("Error reading from remote: %s", safe_strerror (errno)); | |
674 | if (remote_debug > 1) | |
675 | { | |
676 | /* Don't use _filtered; we can't deal with a QUIT out of | |
c5aa993b | 677 | target_wait, and I think this might be called from there. */ |
c906108c | 678 | if (ch != SERIAL_TIMEOUT) |
9846de1b | 679 | fprintf_unfiltered (gdb_stdlog, "Read '%c' %d 0x%x\n", ch, ch, ch); |
c906108c | 680 | else |
9846de1b | 681 | fprintf_unfiltered (gdb_stdlog, "Timed out in read\n"); |
c906108c SS |
682 | } |
683 | ||
684 | /* If we have seen mips_monitor_prompt and we either time out, or | |
685 | we see a @ (which was echoed from a packet we sent), reset the | |
686 | board as described above. The first character in a packet after | |
687 | the SYN (which is not echoed) is always an @ unless the packet is | |
688 | more than 64 characters long, which ours never are. */ | |
689 | if ((ch == SERIAL_TIMEOUT || ch == '@') | |
690 | && state == mips_monitor_prompt_len | |
c5aa993b JM |
691 | && !mips_initializing |
692 | && !mips_exiting) | |
c906108c SS |
693 | { |
694 | if (remote_debug > 0) | |
695 | /* Don't use _filtered; we can't deal with a QUIT out of | |
696 | target_wait, and I think this might be called from there. */ | |
9846de1b | 697 | fprintf_unfiltered (gdb_stdlog, "Reinitializing MIPS debugging mode\n"); |
c906108c SS |
698 | |
699 | mips_need_reply = 0; | |
700 | mips_initialize (); | |
701 | ||
702 | state = 0; | |
703 | ||
704 | /* At this point, about the only thing we can do is abort the command | |
c5aa993b | 705 | in progress and get back to command level as quickly as possible. */ |
c906108c SS |
706 | |
707 | error ("Remote board reset, debug protocol re-initialized."); | |
708 | } | |
709 | ||
710 | if (ch == mips_monitor_prompt[state]) | |
711 | ++state; | |
712 | else | |
713 | state = 0; | |
714 | ||
715 | return ch; | |
716 | } | |
717 | ||
718 | /* Get a packet header, putting the data in the supplied buffer. | |
719 | PGARBAGE is a pointer to the number of garbage characters received | |
720 | so far. CH is the last character received. Returns 0 for success, | |
721 | or -1 for timeout. */ | |
722 | ||
723 | static int | |
fba45db2 | 724 | mips_receive_header (unsigned char *hdr, int *pgarbage, int ch, int timeout) |
c906108c SS |
725 | { |
726 | int i; | |
727 | ||
728 | while (1) | |
729 | { | |
730 | /* Wait for a SYN. mips_syn_garbage is intended to prevent | |
c5aa993b JM |
731 | sitting here indefinitely if the board sends us one garbage |
732 | character per second. ch may already have a value from the | |
733 | last time through the loop. */ | |
c906108c SS |
734 | while (ch != SYN) |
735 | { | |
736 | ch = mips_readchar (timeout); | |
737 | if (ch == SERIAL_TIMEOUT) | |
c5aa993b | 738 | return -1; |
c906108c SS |
739 | if (ch != SYN) |
740 | { | |
741 | /* Printing the character here lets the user of gdb see | |
c5aa993b | 742 | what the program is outputting, if the debugging is |
59d521c1 AC |
743 | being done on the console port. Don't use _filtered: |
744 | we can't deal with a QUIT out of target_wait and | |
745 | buffered target output confuses the user. */ | |
746 | if (!mips_initializing || remote_debug > 0) | |
747 | { | |
748 | if (isprint (ch) || isspace (ch)) | |
749 | { | |
750 | fputc_unfiltered (ch, gdb_stdtarg); | |
751 | } | |
752 | else | |
753 | { | |
754 | fputc_readable (ch, gdb_stdtarg); | |
755 | } | |
756 | gdb_flush (gdb_stdtarg); | |
757 | } | |
758 | ||
759 | /* Only count unprintable characters. */ | |
760 | if (! (isprint (ch) || isspace (ch))) | |
761 | (*pgarbage) += 1; | |
762 | ||
c906108c SS |
763 | if (mips_syn_garbage > 0 |
764 | && *pgarbage > mips_syn_garbage) | |
c5aa993b | 765 | mips_error ("Debug protocol failure: more than %d characters before a sync.", |
c906108c SS |
766 | mips_syn_garbage); |
767 | } | |
768 | } | |
769 | ||
770 | /* Get the packet header following the SYN. */ | |
771 | for (i = 1; i < HDR_LENGTH; i++) | |
772 | { | |
773 | ch = mips_readchar (timeout); | |
774 | if (ch == SERIAL_TIMEOUT) | |
c5aa993b | 775 | return -1; |
c906108c | 776 | /* Make sure this is a header byte. */ |
c5aa993b | 777 | if (ch == SYN || !HDR_CHECK (ch)) |
c906108c SS |
778 | break; |
779 | ||
780 | hdr[i] = ch; | |
781 | } | |
782 | ||
783 | /* If we got the complete header, we can return. Otherwise we | |
c5aa993b | 784 | loop around and keep looking for SYN. */ |
c906108c | 785 | if (i >= HDR_LENGTH) |
c5aa993b | 786 | return 0; |
c906108c SS |
787 | } |
788 | } | |
789 | ||
790 | /* Get a packet header, putting the data in the supplied buffer. | |
791 | PGARBAGE is a pointer to the number of garbage characters received | |
792 | so far. The last character read is returned in *PCH. Returns 0 | |
793 | for success, -1 for timeout, -2 for error. */ | |
794 | ||
795 | static int | |
fba45db2 | 796 | mips_receive_trailer (unsigned char *trlr, int *pgarbage, int *pch, int timeout) |
c906108c SS |
797 | { |
798 | int i; | |
799 | int ch; | |
800 | ||
801 | for (i = 0; i < TRLR_LENGTH; i++) | |
802 | { | |
803 | ch = mips_readchar (timeout); | |
804 | *pch = ch; | |
805 | if (ch == SERIAL_TIMEOUT) | |
806 | return -1; | |
c5aa993b | 807 | if (!TRLR_CHECK (ch)) |
c906108c SS |
808 | return -2; |
809 | trlr[i] = ch; | |
810 | } | |
811 | return 0; | |
812 | } | |
813 | ||
814 | /* Get the checksum of a packet. HDR points to the packet header. | |
815 | DATA points to the packet data. LEN is the length of DATA. */ | |
816 | ||
817 | static int | |
fba45db2 | 818 | mips_cksum (const unsigned char *hdr, const unsigned char *data, int len) |
c906108c | 819 | { |
52f0bd74 AC |
820 | const unsigned char *p; |
821 | int c; | |
822 | int cksum; | |
c906108c SS |
823 | |
824 | cksum = 0; | |
825 | ||
826 | /* The initial SYN is not included in the checksum. */ | |
827 | c = HDR_LENGTH - 1; | |
828 | p = hdr + 1; | |
829 | while (c-- != 0) | |
830 | cksum += *p++; | |
c5aa993b | 831 | |
c906108c SS |
832 | c = len; |
833 | p = data; | |
834 | while (c-- != 0) | |
835 | cksum += *p++; | |
836 | ||
837 | return cksum; | |
838 | } | |
839 | ||
840 | /* Send a packet containing the given ASCII string. */ | |
841 | ||
842 | static void | |
fba45db2 | 843 | mips_send_packet (const char *s, int get_ack) |
c906108c SS |
844 | { |
845 | /* unsigned */ int len; | |
846 | unsigned char *packet; | |
52f0bd74 | 847 | int cksum; |
c906108c SS |
848 | int try; |
849 | ||
850 | len = strlen (s); | |
851 | if (len > DATA_MAXLEN) | |
852 | mips_error ("MIPS protocol data packet too long: %s", s); | |
853 | ||
854 | packet = (unsigned char *) alloca (HDR_LENGTH + len + TRLR_LENGTH + 1); | |
855 | ||
856 | packet[HDR_INDX_SYN] = HDR_SET_SYN (1, len, mips_send_seq); | |
857 | packet[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (1, len, mips_send_seq); | |
858 | packet[HDR_INDX_LEN1] = HDR_SET_LEN1 (1, len, mips_send_seq); | |
859 | packet[HDR_INDX_SEQ] = HDR_SET_SEQ (1, len, mips_send_seq); | |
860 | ||
861 | memcpy (packet + HDR_LENGTH, s, len); | |
862 | ||
863 | cksum = mips_cksum (packet, packet + HDR_LENGTH, len); | |
864 | packet[HDR_LENGTH + len + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum); | |
865 | packet[HDR_LENGTH + len + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum); | |
866 | packet[HDR_LENGTH + len + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum); | |
867 | ||
868 | /* Increment the sequence number. This will set mips_send_seq to | |
869 | the sequence number we expect in the acknowledgement. */ | |
870 | mips_send_seq = (mips_send_seq + 1) % SEQ_MODULOS; | |
871 | ||
872 | /* We can only have one outstanding data packet, so we just wait for | |
873 | the acknowledgement here. Keep retransmitting the packet until | |
874 | we get one, or until we've tried too many times. */ | |
875 | for (try = 0; try < mips_send_retries; try++) | |
876 | { | |
877 | int garbage; | |
878 | int ch; | |
879 | ||
880 | if (remote_debug > 0) | |
881 | { | |
882 | /* Don't use _filtered; we can't deal with a QUIT out of | |
883 | target_wait, and I think this might be called from there. */ | |
884 | packet[HDR_LENGTH + len + TRLR_LENGTH] = '\0'; | |
9846de1b | 885 | fprintf_unfiltered (gdb_stdlog, "Writing \"%s\"\n", packet + 1); |
c906108c SS |
886 | } |
887 | ||
2cd58942 | 888 | if (serial_write (mips_desc, packet, |
c906108c SS |
889 | HDR_LENGTH + len + TRLR_LENGTH) != 0) |
890 | mips_error ("write to target failed: %s", safe_strerror (errno)); | |
891 | ||
c5aa993b | 892 | if (!get_ack) |
c906108c SS |
893 | return; |
894 | ||
895 | garbage = 0; | |
896 | ch = 0; | |
897 | while (1) | |
898 | { | |
899 | unsigned char hdr[HDR_LENGTH + 1]; | |
900 | unsigned char trlr[TRLR_LENGTH + 1]; | |
901 | int err; | |
902 | unsigned int seq; | |
903 | ||
904 | /* Get the packet header. If we time out, resend the data | |
905 | packet. */ | |
906 | err = mips_receive_header (hdr, &garbage, ch, mips_retransmit_wait); | |
907 | if (err != 0) | |
908 | break; | |
909 | ||
910 | ch = 0; | |
911 | ||
912 | /* If we get a data packet, assume it is a duplicate and | |
913 | ignore it. FIXME: If the acknowledgement is lost, this | |
914 | data packet may be the packet the remote sends after the | |
915 | acknowledgement. */ | |
c5aa993b JM |
916 | if (HDR_IS_DATA (hdr)) |
917 | { | |
918 | int i; | |
919 | ||
920 | /* Ignore any errors raised whilst attempting to ignore | |
921 | packet. */ | |
922 | ||
923 | len = HDR_GET_LEN (hdr); | |
924 | ||
925 | for (i = 0; i < len; i++) | |
926 | { | |
927 | int rch; | |
928 | ||
688991e6 | 929 | rch = mips_readchar (remote_timeout); |
c5aa993b JM |
930 | if (rch == SYN) |
931 | { | |
932 | ch = SYN; | |
933 | break; | |
934 | } | |
935 | if (rch == SERIAL_TIMEOUT) | |
936 | break; | |
937 | /* ignore the character */ | |
938 | } | |
939 | ||
940 | if (i == len) | |
688991e6 AC |
941 | (void) mips_receive_trailer (trlr, &garbage, &ch, |
942 | remote_timeout); | |
c5aa993b JM |
943 | |
944 | /* We don't bother checking the checksum, or providing an | |
945 | ACK to the packet. */ | |
946 | continue; | |
947 | } | |
c906108c SS |
948 | |
949 | /* If the length is not 0, this is a garbled packet. */ | |
950 | if (HDR_GET_LEN (hdr) != 0) | |
951 | continue; | |
952 | ||
953 | /* Get the packet trailer. */ | |
954 | err = mips_receive_trailer (trlr, &garbage, &ch, | |
955 | mips_retransmit_wait); | |
956 | ||
957 | /* If we timed out, resend the data packet. */ | |
958 | if (err == -1) | |
959 | break; | |
960 | ||
961 | /* If we got a bad character, reread the header. */ | |
962 | if (err != 0) | |
963 | continue; | |
964 | ||
965 | /* If the checksum does not match the trailer checksum, this | |
966 | is a bad packet; ignore it. */ | |
967 | if (mips_cksum (hdr, (unsigned char *) NULL, 0) | |
968 | != TRLR_GET_CKSUM (trlr)) | |
969 | continue; | |
970 | ||
971 | if (remote_debug > 0) | |
972 | { | |
973 | hdr[HDR_LENGTH] = '\0'; | |
974 | trlr[TRLR_LENGTH] = '\0'; | |
975 | /* Don't use _filtered; we can't deal with a QUIT out of | |
c5aa993b | 976 | target_wait, and I think this might be called from there. */ |
9846de1b JM |
977 | fprintf_unfiltered (gdb_stdlog, "Got ack %d \"%s%s\"\n", |
978 | HDR_GET_SEQ (hdr), hdr + 1, trlr); | |
c906108c SS |
979 | } |
980 | ||
981 | /* If this ack is for the current packet, we're done. */ | |
982 | seq = HDR_GET_SEQ (hdr); | |
983 | if (seq == mips_send_seq) | |
984 | return; | |
985 | ||
986 | /* If this ack is for the last packet, resend the current | |
987 | packet. */ | |
988 | if ((seq + 1) % SEQ_MODULOS == mips_send_seq) | |
989 | break; | |
990 | ||
991 | /* Otherwise this is a bad ack; ignore it. Increment the | |
992 | garbage count to ensure that we do not stay in this loop | |
993 | forever. */ | |
994 | ++garbage; | |
995 | } | |
996 | } | |
997 | ||
998 | mips_error ("Remote did not acknowledge packet"); | |
999 | } | |
1000 | ||
1001 | /* Receive and acknowledge a packet, returning the data in BUFF (which | |
1002 | should be DATA_MAXLEN + 1 bytes). The protocol documentation | |
1003 | implies that only the sender retransmits packets, so this code just | |
1004 | waits silently for a packet. It returns the length of the received | |
1005 | packet. If THROW_ERROR is nonzero, call error() on errors. If not, | |
1006 | don't print an error message and return -1. */ | |
1007 | ||
1008 | static int | |
fba45db2 | 1009 | mips_receive_packet (char *buff, int throw_error, int timeout) |
c906108c SS |
1010 | { |
1011 | int ch; | |
1012 | int garbage; | |
1013 | int len; | |
1014 | unsigned char ack[HDR_LENGTH + TRLR_LENGTH + 1]; | |
1015 | int cksum; | |
1016 | ||
1017 | ch = 0; | |
1018 | garbage = 0; | |
1019 | while (1) | |
1020 | { | |
1021 | unsigned char hdr[HDR_LENGTH]; | |
1022 | unsigned char trlr[TRLR_LENGTH]; | |
1023 | int i; | |
1024 | int err; | |
1025 | ||
1026 | if (mips_receive_header (hdr, &garbage, ch, timeout) != 0) | |
1027 | { | |
1028 | if (throw_error) | |
1029 | mips_error ("Timed out waiting for remote packet"); | |
1030 | else | |
1031 | return -1; | |
1032 | } | |
1033 | ||
1034 | ch = 0; | |
1035 | ||
1036 | /* An acknowledgement is probably a duplicate; ignore it. */ | |
c5aa993b | 1037 | if (!HDR_IS_DATA (hdr)) |
c906108c | 1038 | { |
c5aa993b JM |
1039 | len = HDR_GET_LEN (hdr); |
1040 | /* Check if the length is valid for an ACK, we may aswell | |
1041 | try and read the remainder of the packet: */ | |
1042 | if (len == 0) | |
1043 | { | |
1044 | /* Ignore the error condition, since we are going to | |
1045 | ignore the packet anyway. */ | |
1046 | (void) mips_receive_trailer (trlr, &garbage, &ch, timeout); | |
1047 | } | |
c906108c SS |
1048 | /* Don't use _filtered; we can't deal with a QUIT out of |
1049 | target_wait, and I think this might be called from there. */ | |
1050 | if (remote_debug > 0) | |
9846de1b | 1051 | fprintf_unfiltered (gdb_stdlog, "Ignoring unexpected ACK\n"); |
c906108c SS |
1052 | continue; |
1053 | } | |
1054 | ||
1055 | len = HDR_GET_LEN (hdr); | |
1056 | for (i = 0; i < len; i++) | |
1057 | { | |
1058 | int rch; | |
1059 | ||
1060 | rch = mips_readchar (timeout); | |
1061 | if (rch == SYN) | |
1062 | { | |
1063 | ch = SYN; | |
1064 | break; | |
1065 | } | |
1066 | if (rch == SERIAL_TIMEOUT) | |
1067 | { | |
1068 | if (throw_error) | |
1069 | mips_error ("Timed out waiting for remote packet"); | |
1070 | else | |
1071 | return -1; | |
1072 | } | |
1073 | buff[i] = rch; | |
1074 | } | |
1075 | ||
1076 | if (i < len) | |
1077 | { | |
1078 | /* Don't use _filtered; we can't deal with a QUIT out of | |
1079 | target_wait, and I think this might be called from there. */ | |
1080 | if (remote_debug > 0) | |
9846de1b JM |
1081 | fprintf_unfiltered (gdb_stdlog, |
1082 | "Got new SYN after %d chars (wanted %d)\n", | |
1083 | i, len); | |
c906108c SS |
1084 | continue; |
1085 | } | |
1086 | ||
1087 | err = mips_receive_trailer (trlr, &garbage, &ch, timeout); | |
1088 | if (err == -1) | |
1089 | { | |
1090 | if (throw_error) | |
1091 | mips_error ("Timed out waiting for packet"); | |
1092 | else | |
1093 | return -1; | |
1094 | } | |
1095 | if (err == -2) | |
1096 | { | |
1097 | /* Don't use _filtered; we can't deal with a QUIT out of | |
1098 | target_wait, and I think this might be called from there. */ | |
1099 | if (remote_debug > 0) | |
9846de1b | 1100 | fprintf_unfiltered (gdb_stdlog, "Got SYN when wanted trailer\n"); |
c906108c SS |
1101 | continue; |
1102 | } | |
1103 | ||
1104 | /* If this is the wrong sequence number, ignore it. */ | |
1105 | if (HDR_GET_SEQ (hdr) != mips_receive_seq) | |
1106 | { | |
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 | if (remote_debug > 0) | |
9846de1b | 1110 | fprintf_unfiltered (gdb_stdlog, |
c5aa993b JM |
1111 | "Ignoring sequence number %d (want %d)\n", |
1112 | HDR_GET_SEQ (hdr), mips_receive_seq); | |
c906108c SS |
1113 | continue; |
1114 | } | |
1115 | ||
1116 | if (mips_cksum (hdr, buff, len) == TRLR_GET_CKSUM (trlr)) | |
c5aa993b | 1117 | break; |
c906108c SS |
1118 | |
1119 | if (remote_debug > 0) | |
1120 | /* Don't use _filtered; we can't deal with a QUIT out of | |
1121 | target_wait, and I think this might be called from there. */ | |
1122 | printf_unfiltered ("Bad checksum; data %d, trailer %d\n", | |
c5aa993b JM |
1123 | mips_cksum (hdr, buff, len), |
1124 | TRLR_GET_CKSUM (trlr)); | |
c906108c SS |
1125 | |
1126 | /* The checksum failed. Send an acknowledgement for the | |
c5aa993b | 1127 | previous packet to tell the remote to resend the packet. */ |
c906108c SS |
1128 | ack[HDR_INDX_SYN] = HDR_SET_SYN (0, 0, mips_receive_seq); |
1129 | ack[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq); | |
1130 | ack[HDR_INDX_LEN1] = HDR_SET_LEN1 (0, 0, mips_receive_seq); | |
1131 | ack[HDR_INDX_SEQ] = HDR_SET_SEQ (0, 0, mips_receive_seq); | |
1132 | ||
1133 | cksum = mips_cksum (ack, (unsigned char *) NULL, 0); | |
1134 | ||
1135 | ack[HDR_LENGTH + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum); | |
1136 | ack[HDR_LENGTH + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum); | |
1137 | ack[HDR_LENGTH + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum); | |
1138 | ||
1139 | if (remote_debug > 0) | |
1140 | { | |
1141 | ack[HDR_LENGTH + TRLR_LENGTH] = '\0'; | |
1142 | /* Don't use _filtered; we can't deal with a QUIT out of | |
1143 | target_wait, and I think this might be called from there. */ | |
1144 | printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq, | |
c5aa993b | 1145 | ack + 1); |
c906108c SS |
1146 | } |
1147 | ||
2cd58942 | 1148 | if (serial_write (mips_desc, ack, HDR_LENGTH + TRLR_LENGTH) != 0) |
c906108c SS |
1149 | { |
1150 | if (throw_error) | |
1151 | mips_error ("write to target failed: %s", safe_strerror (errno)); | |
1152 | else | |
1153 | return -1; | |
1154 | } | |
1155 | } | |
1156 | ||
1157 | if (remote_debug > 0) | |
1158 | { | |
1159 | buff[len] = '\0'; | |
1160 | /* Don't use _filtered; we can't deal with a QUIT out of | |
c5aa993b | 1161 | target_wait, and I think this might be called from there. */ |
c906108c SS |
1162 | printf_unfiltered ("Got packet \"%s\"\n", buff); |
1163 | } | |
1164 | ||
1165 | /* We got the packet. Send an acknowledgement. */ | |
1166 | mips_receive_seq = (mips_receive_seq + 1) % SEQ_MODULOS; | |
1167 | ||
1168 | ack[HDR_INDX_SYN] = HDR_SET_SYN (0, 0, mips_receive_seq); | |
1169 | ack[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq); | |
1170 | ack[HDR_INDX_LEN1] = HDR_SET_LEN1 (0, 0, mips_receive_seq); | |
1171 | ack[HDR_INDX_SEQ] = HDR_SET_SEQ (0, 0, mips_receive_seq); | |
1172 | ||
1173 | cksum = mips_cksum (ack, (unsigned char *) NULL, 0); | |
1174 | ||
1175 | ack[HDR_LENGTH + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum); | |
1176 | ack[HDR_LENGTH + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum); | |
1177 | ack[HDR_LENGTH + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum); | |
1178 | ||
1179 | if (remote_debug > 0) | |
1180 | { | |
1181 | ack[HDR_LENGTH + TRLR_LENGTH] = '\0'; | |
1182 | /* Don't use _filtered; we can't deal with a QUIT out of | |
c5aa993b | 1183 | target_wait, and I think this might be called from there. */ |
c906108c | 1184 | printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq, |
c5aa993b | 1185 | ack + 1); |
c906108c SS |
1186 | } |
1187 | ||
2cd58942 | 1188 | if (serial_write (mips_desc, ack, HDR_LENGTH + TRLR_LENGTH) != 0) |
c906108c SS |
1189 | { |
1190 | if (throw_error) | |
1191 | mips_error ("write to target failed: %s", safe_strerror (errno)); | |
1192 | else | |
1193 | return -1; | |
1194 | } | |
1195 | ||
1196 | return len; | |
1197 | } | |
1198 | \f | |
1199 | /* Optionally send a request to the remote system and optionally wait | |
1200 | for the reply. This implements the remote debugging protocol, | |
1201 | which is built on top of the packet protocol defined above. Each | |
1202 | request has an ADDR argument and a DATA argument. The following | |
1203 | requests are defined: | |
1204 | ||
c5aa993b JM |
1205 | \0 don't send a request; just wait for a reply |
1206 | i read word from instruction space at ADDR | |
1207 | d read word from data space at ADDR | |
1208 | I write DATA to instruction space at ADDR | |
1209 | D write DATA to data space at ADDR | |
1210 | r read register number ADDR | |
1211 | R set register number ADDR to value DATA | |
1212 | c continue execution (if ADDR != 1, set pc to ADDR) | |
1213 | s single step (if ADDR != 1, set pc to ADDR) | |
c906108c SS |
1214 | |
1215 | The read requests return the value requested. The write requests | |
1216 | return the previous value in the changed location. The execution | |
1217 | requests return a UNIX wait value (the approximate signal which | |
1218 | caused execution to stop is in the upper eight bits). | |
1219 | ||
1220 | If PERR is not NULL, this function waits for a reply. If an error | |
1221 | occurs, it sets *PERR to 1 and sets errno according to what the | |
1222 | target board reports. */ | |
1223 | ||
4014092b AC |
1224 | static ULONGEST |
1225 | mips_request (int cmd, | |
1226 | ULONGEST addr, | |
1227 | ULONGEST data, | |
1228 | int *perr, | |
1229 | int timeout, | |
1230 | char *buff) | |
c906108c SS |
1231 | { |
1232 | char myBuff[DATA_MAXLEN + 1]; | |
1233 | int len; | |
1234 | int rpid; | |
1235 | char rcmd; | |
1236 | int rerrflg; | |
1237 | unsigned long rresponse; | |
1238 | ||
1239 | if (buff == (char *) NULL) | |
1240 | buff = myBuff; | |
1241 | ||
1242 | if (cmd != '\0') | |
1243 | { | |
1244 | if (mips_need_reply) | |
8e65ff28 AC |
1245 | internal_error (__FILE__, __LINE__, |
1246 | "mips_request: Trying to send command before reply"); | |
c906108c SS |
1247 | sprintf (buff, "0x0 %c 0x%s 0x%s", cmd, paddr_nz (addr), paddr_nz (data)); |
1248 | mips_send_packet (buff, 1); | |
1249 | mips_need_reply = 1; | |
1250 | } | |
1251 | ||
1252 | if (perr == (int *) NULL) | |
1253 | return 0; | |
1254 | ||
c5aa993b | 1255 | if (!mips_need_reply) |
8e65ff28 AC |
1256 | internal_error (__FILE__, __LINE__, |
1257 | "mips_request: Trying to get reply before command"); | |
c906108c SS |
1258 | |
1259 | mips_need_reply = 0; | |
1260 | ||
1261 | len = mips_receive_packet (buff, 1, timeout); | |
1262 | buff[len] = '\0'; | |
1263 | ||
1264 | if (sscanf (buff, "0x%x %c 0x%x 0x%lx", | |
1265 | &rpid, &rcmd, &rerrflg, &rresponse) != 4 | |
1266 | || (cmd != '\0' && rcmd != cmd)) | |
1267 | mips_error ("Bad response from remote board"); | |
1268 | ||
1269 | if (rerrflg != 0) | |
1270 | { | |
1271 | *perr = 1; | |
1272 | ||
1273 | /* FIXME: This will returns MIPS errno numbers, which may or may | |
c5aa993b JM |
1274 | not be the same as errno values used on other systems. If |
1275 | they stick to common errno values, they will be the same, but | |
1276 | if they don't, they must be translated. */ | |
c906108c SS |
1277 | errno = rresponse; |
1278 | ||
1279 | return 0; | |
1280 | } | |
1281 | ||
1282 | *perr = 0; | |
1283 | return rresponse; | |
1284 | } | |
1285 | ||
1286 | static void | |
4efb68b1 | 1287 | mips_initialize_cleanups (void *arg) |
c906108c SS |
1288 | { |
1289 | mips_initializing = 0; | |
1290 | } | |
1291 | ||
1292 | static void | |
4efb68b1 | 1293 | mips_exit_cleanups (void *arg) |
c906108c SS |
1294 | { |
1295 | mips_exiting = 0; | |
1296 | } | |
1297 | ||
1298 | static void | |
fba45db2 | 1299 | mips_send_command (const char *cmd, int prompt) |
c906108c | 1300 | { |
2cd58942 | 1301 | serial_write (mips_desc, cmd, strlen (cmd)); |
c906108c SS |
1302 | mips_expect (cmd); |
1303 | mips_expect ("\n"); | |
1304 | if (prompt) | |
1305 | mips_expect (mips_monitor_prompt); | |
1306 | } | |
1307 | ||
1308 | /* Enter remote (dbx) debug mode: */ | |
1309 | static void | |
fba45db2 | 1310 | mips_enter_debug (void) |
c906108c SS |
1311 | { |
1312 | /* Reset the sequence numbers, ready for the new debug sequence: */ | |
1313 | mips_send_seq = 0; | |
1314 | mips_receive_seq = 0; | |
1315 | ||
1316 | if (mips_monitor != MON_IDT) | |
1317 | mips_send_command ("debug\r", 0); | |
c5aa993b | 1318 | else /* assume IDT monitor by default */ |
c906108c SS |
1319 | mips_send_command ("db tty0\r", 0); |
1320 | ||
c5aa993b | 1321 | sleep (1); |
2cd58942 | 1322 | serial_write (mips_desc, "\r", sizeof "\r" - 1); |
c906108c SS |
1323 | |
1324 | /* We don't need to absorb any spurious characters here, since the | |
1325 | mips_receive_header will eat up a reasonable number of characters | |
1326 | whilst looking for the SYN, however this avoids the "garbage" | |
1327 | being displayed to the user. */ | |
1328 | if (mips_monitor != MON_IDT) | |
1329 | mips_expect ("\r"); | |
c5aa993b | 1330 | |
c906108c SS |
1331 | { |
1332 | char buff[DATA_MAXLEN + 1]; | |
1333 | if (mips_receive_packet (buff, 1, 3) < 0) | |
1334 | mips_error ("Failed to initialize (didn't receive packet)."); | |
1335 | } | |
1336 | } | |
1337 | ||
1338 | /* Exit remote (dbx) debug mode, returning to the monitor prompt: */ | |
1339 | static int | |
fba45db2 | 1340 | mips_exit_debug (void) |
c906108c SS |
1341 | { |
1342 | int err; | |
1343 | struct cleanup *old_cleanups = make_cleanup (mips_exit_cleanups, NULL); | |
1344 | ||
1345 | mips_exiting = 1; | |
1346 | ||
1347 | if (mips_monitor != MON_IDT) | |
1348 | { | |
1349 | /* The DDB (NEC) and MiniRISC (LSI) versions of PMON exit immediately, | |
1350 | so we do not get a reply to this command: */ | |
4014092b | 1351 | mips_request ('x', 0, 0, NULL, mips_receive_wait, NULL); |
c906108c SS |
1352 | mips_need_reply = 0; |
1353 | if (!mips_expect (" break!")) | |
c5aa993b | 1354 | return -1; |
c906108c SS |
1355 | } |
1356 | else | |
4014092b | 1357 | mips_request ('x', 0, 0, &err, mips_receive_wait, NULL); |
c906108c SS |
1358 | |
1359 | if (!mips_expect (mips_monitor_prompt)) | |
1360 | return -1; | |
1361 | ||
1362 | do_cleanups (old_cleanups); | |
1363 | ||
1364 | return 0; | |
1365 | } | |
1366 | ||
1367 | /* Initialize a new connection to the MIPS board, and make sure we are | |
1368 | really connected. */ | |
1369 | ||
1370 | static void | |
fba45db2 | 1371 | mips_initialize (void) |
c906108c SS |
1372 | { |
1373 | int err; | |
1374 | struct cleanup *old_cleanups = make_cleanup (mips_initialize_cleanups, NULL); | |
1375 | int j; | |
1376 | ||
1377 | /* What is this code doing here? I don't see any way it can happen, and | |
1378 | it might mean mips_initializing didn't get cleared properly. | |
1379 | So I'll make it a warning. */ | |
1380 | ||
1381 | if (mips_initializing) | |
1382 | { | |
1383 | warning ("internal error: mips_initialize called twice"); | |
1384 | return; | |
1385 | } | |
1386 | ||
1387 | mips_wait_flag = 0; | |
1388 | mips_initializing = 1; | |
1389 | ||
1390 | /* At this point, the packit protocol isn't responding. We'll try getting | |
1391 | into the monitor, and restarting the protocol. */ | |
1392 | ||
1393 | /* Force the system into the monitor. After this we *should* be at | |
1394 | the mips_monitor_prompt. */ | |
1395 | if (mips_monitor != MON_IDT) | |
c5aa993b | 1396 | j = 0; /* start by checking if we are already at the prompt */ |
c906108c | 1397 | else |
c5aa993b | 1398 | j = 1; /* start by sending a break */ |
c906108c SS |
1399 | for (; j <= 4; j++) |
1400 | { | |
1401 | switch (j) | |
1402 | { | |
c5aa993b | 1403 | case 0: /* First, try sending a CR */ |
2cd58942 AC |
1404 | serial_flush_input (mips_desc); |
1405 | serial_write (mips_desc, "\r", 1); | |
c5aa993b JM |
1406 | break; |
1407 | case 1: /* First, try sending a break */ | |
2cd58942 | 1408 | serial_send_break (mips_desc); |
c906108c | 1409 | break; |
c5aa993b | 1410 | case 2: /* Then, try a ^C */ |
2cd58942 | 1411 | serial_write (mips_desc, "\003", 1); |
c906108c | 1412 | break; |
c5aa993b | 1413 | case 3: /* Then, try escaping from download */ |
c906108c | 1414 | { |
c5aa993b JM |
1415 | if (mips_monitor != MON_IDT) |
1416 | { | |
1417 | char tbuff[7]; | |
1418 | ||
1419 | /* We shouldn't need to send multiple termination | |
1420 | sequences, since the target performs line (or | |
1421 | block) reads, and then processes those | |
1422 | packets. In-case we were downloading a large packet | |
1423 | we flush the output buffer before inserting a | |
1424 | termination sequence. */ | |
2cd58942 | 1425 | serial_flush_output (mips_desc); |
c5aa993b | 1426 | sprintf (tbuff, "\r/E/E\r"); |
2cd58942 | 1427 | serial_write (mips_desc, tbuff, 6); |
c5aa993b JM |
1428 | } |
1429 | else | |
1430 | { | |
1431 | char srec[10]; | |
1432 | int i; | |
1433 | ||
1434 | /* We are possibly in binary download mode, having | |
1435 | aborted in the middle of an S-record. ^C won't | |
1436 | work because of binary mode. The only reliable way | |
1437 | out is to send enough termination packets (8 bytes) | |
1438 | to fill up and then overflow the largest size | |
1439 | S-record (255 bytes in this case). This amounts to | |
1440 | 256/8 + 1 packets. | |
1441 | */ | |
1442 | ||
1443 | mips_make_srec (srec, '7', 0, NULL, 0); | |
1444 | ||
1445 | for (i = 1; i <= 33; i++) | |
1446 | { | |
2cd58942 | 1447 | serial_write (mips_desc, srec, 8); |
c5aa993b | 1448 | |
2cd58942 | 1449 | if (serial_readchar (mips_desc, 0) >= 0) |
c5aa993b | 1450 | break; /* Break immediatly if we get something from |
c906108c | 1451 | the board. */ |
c5aa993b JM |
1452 | } |
1453 | } | |
1454 | } | |
c906108c SS |
1455 | break; |
1456 | case 4: | |
1457 | mips_error ("Failed to initialize."); | |
1458 | } | |
1459 | ||
1460 | if (mips_expect (mips_monitor_prompt)) | |
1461 | break; | |
1462 | } | |
1463 | ||
1464 | if (mips_monitor != MON_IDT) | |
1465 | { | |
1466 | /* Sometimes PMON ignores the first few characters in the first | |
1467 | command sent after a load. Sending a blank command gets | |
c5aa993b | 1468 | around that. */ |
c906108c SS |
1469 | mips_send_command ("\r", -1); |
1470 | ||
1471 | /* Ensure the correct target state: */ | |
1472 | if (mips_monitor != MON_LSI) | |
1473 | mips_send_command ("set regsize 64\r", -1); | |
1474 | mips_send_command ("set hostport tty0\r", -1); | |
1475 | mips_send_command ("set brkcmd \"\"\r", -1); | |
1476 | /* Delete all the current breakpoints: */ | |
1477 | mips_send_command ("db *\r", -1); | |
1478 | /* NOTE: PMON does not have breakpoint support through the | |
1479 | "debug" mode, only at the monitor command-line. */ | |
1480 | } | |
1481 | ||
1482 | mips_enter_debug (); | |
1483 | ||
1484 | /* Clear all breakpoints: */ | |
1485 | if ((mips_monitor == MON_IDT | |
1486 | && clear_breakpoint (-1, 0, BREAK_UNUSED) == 0) | |
1487 | || mips_monitor == MON_LSI) | |
1488 | monitor_supports_breakpoints = 1; | |
1489 | else | |
1490 | monitor_supports_breakpoints = 0; | |
1491 | ||
1492 | do_cleanups (old_cleanups); | |
1493 | ||
1494 | /* If this doesn't call error, we have connected; we don't care if | |
1495 | the request itself succeeds or fails. */ | |
1496 | ||
4014092b | 1497 | mips_request ('r', 0, 0, &err, mips_receive_wait, NULL); |
c906108c SS |
1498 | } |
1499 | ||
1500 | /* Open a connection to the remote board. */ | |
1501 | static void | |
fba45db2 | 1502 | common_open (struct target_ops *ops, char *name, int from_tty, |
98691afe AC |
1503 | enum mips_monitor_type new_monitor, |
1504 | const char *new_monitor_prompt) | |
c906108c SS |
1505 | { |
1506 | char *ptype; | |
1507 | char *serial_port_name; | |
1508 | char *remote_name = 0; | |
1509 | char *local_name = 0; | |
1510 | char **argv; | |
1511 | ||
1512 | if (name == 0) | |
1513 | error ( | |
c5aa993b | 1514 | "To open a MIPS remote debugging connection, you need to specify what serial\n\ |
c906108c | 1515 | device is attached to the target board (e.g., /dev/ttya).\n" |
c5aa993b JM |
1516 | "If you want to use TFTP to download to the board, specify the name of a\n" |
1517 | "temporary file to be used by GDB for downloads as the second argument.\n" | |
1518 | "This filename must be in the form host:filename, where host is the name\n" | |
1519 | "of the host running the TFTP server, and the file must be readable by the\n" | |
1520 | "world. If the local name of the temporary file differs from the name as\n" | |
1521 | "seen from the board via TFTP, specify that name as the third parameter.\n"); | |
c906108c SS |
1522 | |
1523 | /* Parse the serial port name, the optional TFTP name, and the | |
1524 | optional local TFTP name. */ | |
1525 | if ((argv = buildargv (name)) == NULL) | |
c5aa993b | 1526 | nomem (0); |
7a292a7a | 1527 | make_cleanup_freeargv (argv); |
c906108c | 1528 | |
4fcf66da | 1529 | serial_port_name = xstrdup (argv[0]); |
c5aa993b | 1530 | if (argv[1]) /* remote TFTP name specified? */ |
c906108c SS |
1531 | { |
1532 | remote_name = argv[1]; | |
c5aa993b | 1533 | if (argv[2]) /* local TFTP filename specified? */ |
c906108c SS |
1534 | local_name = argv[2]; |
1535 | } | |
1536 | ||
1537 | target_preopen (from_tty); | |
1538 | ||
1539 | if (mips_is_open) | |
1540 | unpush_target (current_ops); | |
1541 | ||
1542 | /* Open and initialize the serial port. */ | |
2cd58942 | 1543 | mips_desc = serial_open (serial_port_name); |
819cc324 | 1544 | if (mips_desc == NULL) |
c906108c SS |
1545 | perror_with_name (serial_port_name); |
1546 | ||
1547 | if (baud_rate != -1) | |
1548 | { | |
2cd58942 | 1549 | if (serial_setbaudrate (mips_desc, baud_rate)) |
c5aa993b | 1550 | { |
2cd58942 | 1551 | serial_close (mips_desc); |
c5aa993b JM |
1552 | perror_with_name (serial_port_name); |
1553 | } | |
c906108c SS |
1554 | } |
1555 | ||
2cd58942 | 1556 | serial_raw (mips_desc); |
c906108c SS |
1557 | |
1558 | /* Open and initialize the optional download port. If it is in the form | |
1559 | hostname#portnumber, it's a UDP socket. If it is in the form | |
1560 | hostname:filename, assume it's the TFTP filename that must be | |
1561 | passed to the DDB board to tell it where to get the load file. */ | |
1562 | if (remote_name) | |
1563 | { | |
1564 | if (strchr (remote_name, '#')) | |
1565 | { | |
2cd58942 | 1566 | udp_desc = serial_open (remote_name); |
c906108c SS |
1567 | if (!udp_desc) |
1568 | perror_with_name ("Unable to open UDP port"); | |
1569 | udp_in_use = 1; | |
1570 | } | |
1571 | else | |
1572 | { | |
1573 | /* Save the remote and local names of the TFTP temp file. If | |
1574 | the user didn't specify a local name, assume it's the same | |
1575 | as the part of the remote name after the "host:". */ | |
1576 | if (tftp_name) | |
b8c9b27d | 1577 | xfree (tftp_name); |
c906108c | 1578 | if (tftp_localname) |
b8c9b27d | 1579 | xfree (tftp_localname); |
c906108c | 1580 | if (local_name == NULL) |
c5aa993b JM |
1581 | if ((local_name = strchr (remote_name, ':')) != NULL) |
1582 | local_name++; /* skip over the colon */ | |
c906108c SS |
1583 | if (local_name == NULL) |
1584 | local_name = remote_name; /* local name same as remote name */ | |
4fcf66da AC |
1585 | tftp_name = xstrdup (remote_name); |
1586 | tftp_localname = xstrdup (local_name); | |
c906108c SS |
1587 | tftp_in_use = 1; |
1588 | } | |
1589 | } | |
1590 | ||
1591 | current_ops = ops; | |
1592 | mips_is_open = 1; | |
1593 | ||
1594 | /* Reset the expected monitor prompt if it's never been set before. */ | |
1595 | if (mips_monitor_prompt == NULL) | |
4fcf66da | 1596 | mips_monitor_prompt = xstrdup (new_monitor_prompt); |
c906108c SS |
1597 | mips_monitor = new_monitor; |
1598 | ||
1599 | mips_initialize (); | |
1600 | ||
1601 | if (from_tty) | |
1602 | printf_unfiltered ("Remote MIPS debugging using %s\n", serial_port_name); | |
1603 | ||
1604 | /* Switch to using remote target now. */ | |
1605 | push_target (ops); | |
1606 | ||
1607 | /* FIXME: Should we call start_remote here? */ | |
1608 | ||
1609 | /* Try to figure out the processor model if possible. */ | |
691c0433 | 1610 | deprecated_mips_set_processor_regs_hack (); |
c906108c | 1611 | |
a193e397 AC |
1612 | /* This is really the job of start_remote however, that makes an |
1613 | assumption that the target is about to print out a status message | |
1614 | of some sort. That doesn't happen here (in fact, it may not be | |
1615 | possible to get the monitor to send the appropriate packet). */ | |
c906108c SS |
1616 | |
1617 | flush_cached_frames (); | |
1618 | registers_changed (); | |
1619 | stop_pc = read_pc (); | |
a193e397 | 1620 | print_stack_frame (get_selected_frame (), -1, 1); |
b8c9b27d | 1621 | xfree (serial_port_name); |
c906108c SS |
1622 | } |
1623 | ||
1624 | static void | |
fba45db2 | 1625 | mips_open (char *name, int from_tty) |
c906108c | 1626 | { |
ef31c1ea AC |
1627 | const char *monitor_prompt = NULL; |
1628 | if (TARGET_ARCHITECTURE != NULL | |
1629 | && TARGET_ARCHITECTURE->arch == bfd_arch_mips) | |
1630 | { | |
1631 | switch (TARGET_ARCHITECTURE->mach) | |
1632 | { | |
1633 | case bfd_mach_mips4100: | |
1634 | case bfd_mach_mips4300: | |
1635 | case bfd_mach_mips4600: | |
1636 | case bfd_mach_mips4650: | |
1637 | case bfd_mach_mips5000: | |
1638 | monitor_prompt = "<RISQ> "; | |
1639 | break; | |
1640 | } | |
1641 | } | |
1642 | if (monitor_prompt == NULL) | |
1643 | monitor_prompt = "<IDT>"; | |
1644 | common_open (&mips_ops, name, from_tty, MON_IDT, monitor_prompt); | |
c906108c SS |
1645 | } |
1646 | ||
1647 | static void | |
fba45db2 | 1648 | pmon_open (char *name, int from_tty) |
c906108c SS |
1649 | { |
1650 | common_open (&pmon_ops, name, from_tty, MON_PMON, "PMON> "); | |
1651 | } | |
1652 | ||
1653 | static void | |
fba45db2 | 1654 | ddb_open (char *name, int from_tty) |
c906108c SS |
1655 | { |
1656 | common_open (&ddb_ops, name, from_tty, MON_DDB, "NEC010>"); | |
1657 | } | |
1658 | ||
1659 | static void | |
fba45db2 | 1660 | lsi_open (char *name, int from_tty) |
c906108c SS |
1661 | { |
1662 | int i; | |
1663 | ||
1664 | /* Clear the LSI breakpoint table. */ | |
1665 | for (i = 0; i < MAX_LSI_BREAKPOINTS; i++) | |
1666 | lsi_breakpoints[i].type = BREAK_UNUSED; | |
c5aa993b | 1667 | |
c906108c SS |
1668 | common_open (&lsi_ops, name, from_tty, MON_LSI, "PMON> "); |
1669 | } | |
1670 | ||
1671 | /* Close a connection to the remote board. */ | |
1672 | ||
1673 | static void | |
fba45db2 | 1674 | mips_close (int quitting) |
c906108c SS |
1675 | { |
1676 | if (mips_is_open) | |
1677 | { | |
1678 | /* Get the board out of remote debugging mode. */ | |
1679 | (void) mips_exit_debug (); | |
1680 | ||
1681 | close_ports (); | |
1682 | } | |
1683 | } | |
1684 | ||
1685 | /* Detach from the remote board. */ | |
1686 | ||
1687 | static void | |
fba45db2 | 1688 | mips_detach (char *args, int from_tty) |
c906108c SS |
1689 | { |
1690 | if (args) | |
1691 | error ("Argument given to \"detach\" when remotely debugging."); | |
1692 | ||
1693 | pop_target (); | |
1694 | ||
1695 | mips_close (1); | |
1696 | ||
1697 | if (from_tty) | |
1698 | printf_unfiltered ("Ending remote MIPS debugging.\n"); | |
1699 | } | |
1700 | ||
1701 | /* Tell the target board to resume. This does not wait for a reply | |
1702 | from the board, except in the case of single-stepping on LSI boards, | |
1703 | where PMON does return a reply. */ | |
1704 | ||
1705 | static void | |
39f77062 | 1706 | mips_resume (ptid_t ptid, int step, enum target_signal siggnal) |
c906108c SS |
1707 | { |
1708 | int err; | |
1709 | ||
1710 | /* LSI PMON requires returns a reply packet "0x1 s 0x0 0x57f" after | |
1711 | a single step, so we wait for that. */ | |
4014092b | 1712 | mips_request (step ? 's' : 'c', 1, siggnal, |
c906108c SS |
1713 | mips_monitor == MON_LSI && step ? &err : (int *) NULL, |
1714 | mips_receive_wait, NULL); | |
1715 | } | |
1716 | ||
1717 | /* Return the signal corresponding to SIG, where SIG is the number which | |
1718 | the MIPS protocol uses for the signal. */ | |
a78f21af | 1719 | static enum target_signal |
fba45db2 | 1720 | mips_signal_from_protocol (int sig) |
c906108c SS |
1721 | { |
1722 | /* We allow a few more signals than the IDT board actually returns, on | |
1723 | the theory that there is at least *some* hope that perhaps the numbering | |
1724 | for these signals is widely agreed upon. */ | |
1725 | if (sig <= 0 | |
1726 | || sig > 31) | |
1727 | return TARGET_SIGNAL_UNKNOWN; | |
1728 | ||
1729 | /* Don't want to use target_signal_from_host because we are converting | |
1730 | from MIPS signal numbers, not host ones. Our internal numbers | |
1731 | match the MIPS numbers for the signals the board can return, which | |
1732 | are: SIGINT, SIGSEGV, SIGBUS, SIGILL, SIGFPE, SIGTRAP. */ | |
1733 | return (enum target_signal) sig; | |
1734 | } | |
1735 | ||
1736 | /* Wait until the remote stops, and return a wait status. */ | |
1737 | ||
39f77062 KB |
1738 | static ptid_t |
1739 | mips_wait (ptid_t ptid, struct target_waitstatus *status) | |
c906108c SS |
1740 | { |
1741 | int rstatus; | |
1742 | int err; | |
1743 | char buff[DATA_MAXLEN]; | |
1744 | int rpc, rfp, rsp; | |
1745 | char flags[20]; | |
1746 | int nfields; | |
1747 | int i; | |
1748 | ||
1749 | interrupt_count = 0; | |
1750 | hit_watchpoint = 0; | |
1751 | ||
1752 | /* If we have not sent a single step or continue command, then the | |
1753 | board is waiting for us to do something. Return a status | |
1754 | indicating that it is stopped. */ | |
c5aa993b | 1755 | if (!mips_need_reply) |
c906108c SS |
1756 | { |
1757 | status->kind = TARGET_WAITKIND_STOPPED; | |
1758 | status->value.sig = TARGET_SIGNAL_TRAP; | |
39f77062 | 1759 | return inferior_ptid; |
c906108c SS |
1760 | } |
1761 | ||
1762 | /* No timeout; we sit here as long as the program continues to execute. */ | |
1763 | mips_wait_flag = 1; | |
4014092b | 1764 | rstatus = mips_request ('\000', 0, 0, &err, -1, buff); |
c906108c SS |
1765 | mips_wait_flag = 0; |
1766 | if (err) | |
1767 | mips_error ("Remote failure: %s", safe_strerror (errno)); | |
1768 | ||
1769 | /* On returning from a continue, the PMON monitor seems to start | |
1770 | echoing back the messages we send prior to sending back the | |
1771 | ACK. The code can cope with this, but to try and avoid the | |
1772 | unnecessary serial traffic, and "spurious" characters displayed | |
1773 | to the user, we cheat and reset the debug protocol. The problems | |
1774 | seems to be caused by a check on the number of arguments, and the | |
1775 | command length, within the monitor causing it to echo the command | |
1776 | as a bad packet. */ | |
1777 | if (mips_monitor == MON_PMON) | |
1778 | { | |
1779 | mips_exit_debug (); | |
1780 | mips_enter_debug (); | |
1781 | } | |
1782 | ||
1783 | /* See if we got back extended status. If so, pick out the pc, fp, sp, etc... */ | |
1784 | ||
1785 | nfields = sscanf (buff, "0x%*x %*c 0x%*x 0x%*x 0x%x 0x%x 0x%x 0x%*x %s", | |
1786 | &rpc, &rfp, &rsp, flags); | |
1787 | if (nfields >= 3) | |
1788 | { | |
123a958e | 1789 | char buf[MAX_REGISTER_SIZE]; |
c906108c | 1790 | |
12c266ea | 1791 | store_unsigned_integer (buf, DEPRECATED_REGISTER_RAW_SIZE (PC_REGNUM), rpc); |
c906108c SS |
1792 | supply_register (PC_REGNUM, buf); |
1793 | ||
12c266ea | 1794 | store_unsigned_integer (buf, DEPRECATED_REGISTER_RAW_SIZE (PC_REGNUM), rfp); |
c5aa993b | 1795 | supply_register (30, buf); /* This register they are avoiding and so it is unnamed */ |
c906108c | 1796 | |
12c266ea | 1797 | store_unsigned_integer (buf, DEPRECATED_REGISTER_RAW_SIZE (SP_REGNUM), rsp); |
c906108c SS |
1798 | supply_register (SP_REGNUM, buf); |
1799 | ||
12c266ea | 1800 | store_unsigned_integer (buf, DEPRECATED_REGISTER_RAW_SIZE (DEPRECATED_FP_REGNUM), 0); |
0ba6dca9 | 1801 | supply_register (DEPRECATED_FP_REGNUM, buf); |
c906108c SS |
1802 | |
1803 | if (nfields == 9) | |
1804 | { | |
1805 | int i; | |
1806 | ||
1807 | for (i = 0; i <= 2; i++) | |
1808 | if (flags[i] == 'r' || flags[i] == 'w') | |
1809 | hit_watchpoint = 1; | |
1810 | else if (flags[i] == '\000') | |
1811 | break; | |
1812 | } | |
1813 | } | |
1814 | ||
1815 | if (strcmp (target_shortname, "lsi") == 0) | |
1816 | { | |
1817 | #if 0 | |
1818 | /* If this is an LSI PMON target, see if we just hit a hardrdware watchpoint. | |
c5aa993b JM |
1819 | Right now, PMON doesn't give us enough information to determine which |
1820 | breakpoint we hit. So we have to look up the PC in our own table | |
1821 | of breakpoints, and if found, assume it's just a normal instruction | |
1822 | fetch breakpoint, not a data watchpoint. FIXME when PMON | |
1823 | provides some way to tell us what type of breakpoint it is. */ | |
c906108c | 1824 | int i; |
c5aa993b | 1825 | CORE_ADDR pc = read_pc (); |
c906108c SS |
1826 | |
1827 | hit_watchpoint = 1; | |
1828 | for (i = 0; i < MAX_LSI_BREAKPOINTS; i++) | |
1829 | { | |
1830 | if (lsi_breakpoints[i].addr == pc | |
1831 | && lsi_breakpoints[i].type == BREAK_FETCH) | |
1832 | { | |
1833 | hit_watchpoint = 0; | |
1834 | break; | |
1835 | } | |
1836 | } | |
1837 | #else | |
1838 | /* If a data breakpoint was hit, PMON returns the following packet: | |
c5aa993b JM |
1839 | 0x1 c 0x0 0x57f 0x1 |
1840 | The return packet from an ordinary breakpoint doesn't have the | |
1841 | extra 0x01 field tacked onto the end. */ | |
c906108c SS |
1842 | if (nfields == 1 && rpc == 1) |
1843 | hit_watchpoint = 1; | |
1844 | #endif | |
1845 | } | |
1846 | ||
1847 | /* NOTE: The following (sig) numbers are defined by PMON: | |
c5aa993b JM |
1848 | SPP_SIGTRAP 5 breakpoint |
1849 | SPP_SIGINT 2 | |
1850 | SPP_SIGSEGV 11 | |
1851 | SPP_SIGBUS 10 | |
1852 | SPP_SIGILL 4 | |
1853 | SPP_SIGFPE 8 | |
1854 | SPP_SIGTERM 15 */ | |
c906108c SS |
1855 | |
1856 | /* Translate a MIPS waitstatus. We use constants here rather than WTERMSIG | |
1857 | and so on, because the constants we want here are determined by the | |
1858 | MIPS protocol and have nothing to do with what host we are running on. */ | |
1859 | if ((rstatus & 0xff) == 0) | |
1860 | { | |
1861 | status->kind = TARGET_WAITKIND_EXITED; | |
1862 | status->value.integer = (((rstatus) >> 8) & 0xff); | |
1863 | } | |
1864 | else if ((rstatus & 0xff) == 0x7f) | |
1865 | { | |
1866 | status->kind = TARGET_WAITKIND_STOPPED; | |
1867 | status->value.sig = mips_signal_from_protocol (((rstatus) >> 8) & 0xff); | |
1868 | ||
1869 | /* If the stop PC is in the _exit function, assume | |
1870 | we hit the 'break 0x3ff' instruction in _exit, so this | |
c5aa993b | 1871 | is not a normal breakpoint. */ |
c906108c SS |
1872 | if (strcmp (target_shortname, "lsi") == 0) |
1873 | { | |
1874 | char *func_name; | |
1875 | CORE_ADDR func_start; | |
c5aa993b | 1876 | CORE_ADDR pc = read_pc (); |
c906108c SS |
1877 | |
1878 | find_pc_partial_function (pc, &func_name, &func_start, NULL); | |
1879 | if (func_name != NULL && strcmp (func_name, "_exit") == 0 | |
1880 | && func_start == pc) | |
1881 | status->kind = TARGET_WAITKIND_EXITED; | |
1882 | } | |
1883 | } | |
1884 | else | |
1885 | { | |
1886 | status->kind = TARGET_WAITKIND_SIGNALLED; | |
1887 | status->value.sig = mips_signal_from_protocol (rstatus & 0x7f); | |
1888 | } | |
1889 | ||
39f77062 | 1890 | return inferior_ptid; |
c906108c SS |
1891 | } |
1892 | ||
1893 | /* We have to map between the register numbers used by gdb and the | |
1894 | register numbers used by the debugging protocol. This function | |
1895 | assumes that we are using tm-mips.h. */ | |
1896 | ||
1897 | #define REGNO_OFFSET 96 | |
1898 | ||
1899 | static int | |
fba45db2 | 1900 | mips_map_regno (int regno) |
c906108c SS |
1901 | { |
1902 | if (regno < 32) | |
1903 | return regno; | |
56cea623 AC |
1904 | if (regno >= mips_regnum (current_gdbarch)->fp0 |
1905 | && regno < mips_regnum (current_gdbarch)->fp0 + 32) | |
1906 | return regno - mips_regnum (current_gdbarch)->fp0 + 32; | |
1907 | else if (regno == mips_regnum (current_gdbarch)->pc) | |
1908 | return REGNO_OFFSET + 0; | |
1909 | else if (regno == mips_regnum (current_gdbarch)->cause) | |
1910 | return REGNO_OFFSET + 1; | |
1911 | else if (regno == mips_regnum (current_gdbarch)->hi) | |
1912 | return REGNO_OFFSET + 2; | |
1913 | else if (regno == mips_regnum (current_gdbarch)->lo) | |
1914 | return REGNO_OFFSET + 3; | |
1915 | else if (regno == mips_regnum (current_gdbarch)->fp_control_status) | |
1916 | return REGNO_OFFSET + 4; | |
1917 | else if (regno == mips_regnum (current_gdbarch)->fp_implementation_revision) | |
1918 | return REGNO_OFFSET + 5; | |
1919 | else | |
1920 | /* FIXME: Is there a way to get the status register? */ | |
1921 | return 0; | |
c906108c SS |
1922 | } |
1923 | ||
1924 | /* Fetch the remote registers. */ | |
1925 | ||
1926 | static void | |
fba45db2 | 1927 | mips_fetch_registers (int regno) |
c906108c SS |
1928 | { |
1929 | unsigned LONGEST val; | |
1930 | int err; | |
1931 | ||
1932 | if (regno == -1) | |
1933 | { | |
1934 | for (regno = 0; regno < NUM_REGS; regno++) | |
1935 | mips_fetch_registers (regno); | |
1936 | return; | |
1937 | } | |
1938 | ||
0ba6dca9 AC |
1939 | if (regno == DEPRECATED_FP_REGNUM || regno == ZERO_REGNUM) |
1940 | /* DEPRECATED_FP_REGNUM on the mips is a hack which is just | |
1941 | supposed to read zero (see also mips-nat.c). */ | |
c906108c SS |
1942 | val = 0; |
1943 | else | |
1944 | { | |
1945 | /* If PMON doesn't support this register, don't waste serial | |
1946 | bandwidth trying to read it. */ | |
1947 | int pmon_reg = mips_map_regno (regno); | |
1948 | if (regno != 0 && pmon_reg == 0) | |
1949 | val = 0; | |
1950 | else | |
1951 | { | |
1952 | /* Unfortunately the PMON version in the Vr4300 board has been | |
1953 | compiled without the 64bit register access commands. This | |
1954 | means we cannot get hold of the full register width. */ | |
1955 | if (mips_monitor == MON_DDB) | |
4014092b AC |
1956 | val = (unsigned) mips_request ('t', pmon_reg, 0, |
1957 | &err, mips_receive_wait, NULL); | |
c906108c | 1958 | else |
4014092b AC |
1959 | val = mips_request ('r', pmon_reg, 0, |
1960 | &err, mips_receive_wait, NULL); | |
c906108c SS |
1961 | if (err) |
1962 | mips_error ("Can't read register %d: %s", regno, | |
1963 | safe_strerror (errno)); | |
1964 | } | |
1965 | } | |
1966 | ||
1967 | { | |
123a958e | 1968 | char buf[MAX_REGISTER_SIZE]; |
c906108c SS |
1969 | |
1970 | /* We got the number the register holds, but gdb expects to see a | |
1971 | value in the target byte ordering. */ | |
12c266ea | 1972 | store_unsigned_integer (buf, DEPRECATED_REGISTER_RAW_SIZE (regno), val); |
c906108c SS |
1973 | supply_register (regno, buf); |
1974 | } | |
1975 | } | |
1976 | ||
1977 | /* Prepare to store registers. The MIPS protocol can store individual | |
1978 | registers, so this function doesn't have to do anything. */ | |
1979 | ||
1980 | static void | |
fba45db2 | 1981 | mips_prepare_to_store (void) |
c906108c SS |
1982 | { |
1983 | } | |
1984 | ||
1985 | /* Store remote register(s). */ | |
1986 | ||
1987 | static void | |
fba45db2 | 1988 | mips_store_registers (int regno) |
c906108c SS |
1989 | { |
1990 | int err; | |
1991 | ||
1992 | if (regno == -1) | |
1993 | { | |
1994 | for (regno = 0; regno < NUM_REGS; regno++) | |
1995 | mips_store_registers (regno); | |
1996 | return; | |
1997 | } | |
1998 | ||
4014092b | 1999 | mips_request ('R', mips_map_regno (regno), |
c906108c SS |
2000 | read_register (regno), |
2001 | &err, mips_receive_wait, NULL); | |
2002 | if (err) | |
2003 | mips_error ("Can't write register %d: %s", regno, safe_strerror (errno)); | |
2004 | } | |
2005 | ||
2006 | /* Fetch a word from the target board. */ | |
2007 | ||
c5aa993b | 2008 | static unsigned int |
fba45db2 | 2009 | mips_fetch_word (CORE_ADDR addr) |
c906108c SS |
2010 | { |
2011 | unsigned int val; | |
2012 | int err; | |
2013 | ||
4014092b | 2014 | val = mips_request ('d', addr, 0, &err, mips_receive_wait, NULL); |
c906108c SS |
2015 | if (err) |
2016 | { | |
2017 | /* Data space failed; try instruction space. */ | |
4014092b | 2018 | val = mips_request ('i', addr, 0, &err, |
c906108c SS |
2019 | mips_receive_wait, NULL); |
2020 | if (err) | |
c5aa993b JM |
2021 | mips_error ("Can't read address 0x%s: %s", |
2022 | paddr_nz (addr), safe_strerror (errno)); | |
c906108c SS |
2023 | } |
2024 | return val; | |
2025 | } | |
2026 | ||
2027 | /* Store a word to the target board. Returns errno code or zero for | |
2028 | success. If OLD_CONTENTS is non-NULL, put the old contents of that | |
2029 | memory location there. */ | |
2030 | ||
2031 | /* FIXME! make sure only 32-bit quantities get stored! */ | |
2032 | static int | |
fba45db2 | 2033 | mips_store_word (CORE_ADDR addr, unsigned int val, char *old_contents) |
c906108c SS |
2034 | { |
2035 | int err; | |
2036 | unsigned int oldcontents; | |
2037 | ||
4014092b | 2038 | oldcontents = mips_request ('D', addr, val, &err, |
c906108c SS |
2039 | mips_receive_wait, NULL); |
2040 | if (err) | |
2041 | { | |
2042 | /* Data space failed; try instruction space. */ | |
4014092b | 2043 | oldcontents = mips_request ('I', addr, val, &err, |
c906108c SS |
2044 | mips_receive_wait, NULL); |
2045 | if (err) | |
2046 | return errno; | |
2047 | } | |
2048 | if (old_contents != NULL) | |
2049 | store_unsigned_integer (old_contents, 4, oldcontents); | |
2050 | return 0; | |
2051 | } | |
2052 | ||
2053 | /* Read or write LEN bytes from inferior memory at MEMADDR, | |
2054 | transferring to or from debugger address MYADDR. Write to inferior | |
2055 | if SHOULD_WRITE is nonzero. Returns length of data written or | |
2056 | read; 0 for error. Note that protocol gives us the correct value | |
2057 | for a longword, since it transfers values in ASCII. We want the | |
2058 | byte values, so we have to swap the longword values. */ | |
2059 | ||
4014092b AC |
2060 | static int mask_address_p = 1; |
2061 | ||
c906108c | 2062 | static int |
fba45db2 | 2063 | mips_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, int write, |
0a65a603 | 2064 | struct mem_attrib *attrib, struct target_ops *target) |
c906108c | 2065 | { |
4014092b AC |
2066 | int i; |
2067 | CORE_ADDR addr; | |
2068 | int count; | |
2069 | char *buffer; | |
2070 | int status; | |
2071 | ||
2072 | /* PMON targets do not cope well with 64 bit addresses. Mask the | |
2073 | value down to 32 bits. */ | |
2074 | if (mask_address_p) | |
2075 | memaddr &= (CORE_ADDR) 0xffffffff; | |
2076 | ||
c906108c | 2077 | /* Round starting address down to longword boundary. */ |
4014092b | 2078 | addr = memaddr & ~3; |
c906108c | 2079 | /* Round ending address up; get number of longwords that makes. */ |
4014092b | 2080 | count = (((memaddr + len) - addr) + 3) / 4; |
c906108c | 2081 | /* Allocate buffer of that many longwords. */ |
4014092b | 2082 | buffer = alloca (count * 4); |
c906108c SS |
2083 | |
2084 | if (write) | |
2085 | { | |
2086 | /* Fill start and end extra bytes of buffer with existing data. */ | |
2087 | if (addr != memaddr || len < 4) | |
2088 | { | |
2089 | /* Need part of initial word -- fetch it. */ | |
2090 | store_unsigned_integer (&buffer[0], 4, mips_fetch_word (addr)); | |
2091 | } | |
2092 | ||
2093 | if (count > 1) | |
2094 | { | |
2095 | /* Need part of last word -- fetch it. FIXME: we do this even | |
2096 | if we don't need it. */ | |
2097 | store_unsigned_integer (&buffer[(count - 1) * 4], 4, | |
2098 | mips_fetch_word (addr + (count - 1) * 4)); | |
2099 | } | |
2100 | ||
2101 | /* Copy data to be written over corresponding part of buffer */ | |
2102 | ||
2103 | memcpy ((char *) buffer + (memaddr & 3), myaddr, len); | |
2104 | ||
2105 | /* Write the entire buffer. */ | |
2106 | ||
2107 | for (i = 0; i < count; i++, addr += 4) | |
2108 | { | |
2109 | status = mips_store_word (addr, | |
c5aa993b | 2110 | extract_unsigned_integer (&buffer[i * 4], 4), |
c906108c SS |
2111 | NULL); |
2112 | /* Report each kilobyte (we download 32-bit words at a time) */ | |
c5aa993b | 2113 | if (i % 256 == 255) |
c906108c SS |
2114 | { |
2115 | printf_unfiltered ("*"); | |
2116 | gdb_flush (gdb_stdout); | |
2117 | } | |
2118 | if (status) | |
2119 | { | |
2120 | errno = status; | |
2121 | return 0; | |
2122 | } | |
2123 | /* FIXME: Do we want a QUIT here? */ | |
2124 | } | |
2125 | if (count >= 256) | |
2126 | printf_unfiltered ("\n"); | |
2127 | } | |
2128 | else | |
2129 | { | |
2130 | /* Read all the longwords */ | |
2131 | for (i = 0; i < count; i++, addr += 4) | |
2132 | { | |
c5aa993b | 2133 | store_unsigned_integer (&buffer[i * 4], 4, mips_fetch_word (addr)); |
c906108c SS |
2134 | QUIT; |
2135 | } | |
2136 | ||
2137 | /* Copy appropriate bytes out of the buffer. */ | |
2138 | memcpy (myaddr, buffer + (memaddr & 3), len); | |
2139 | } | |
2140 | return len; | |
2141 | } | |
2142 | ||
2143 | /* Print info on this target. */ | |
2144 | ||
2145 | static void | |
fba45db2 | 2146 | mips_files_info (struct target_ops *ignore) |
c906108c SS |
2147 | { |
2148 | printf_unfiltered ("Debugging a MIPS board over a serial line.\n"); | |
2149 | } | |
2150 | ||
2151 | /* Kill the process running on the board. This will actually only | |
2152 | work if we are doing remote debugging over the console input. I | |
2153 | think that if IDT/sim had the remote debug interrupt enabled on the | |
2154 | right port, we could interrupt the process with a break signal. */ | |
2155 | ||
2156 | static void | |
fba45db2 | 2157 | mips_kill (void) |
c906108c SS |
2158 | { |
2159 | if (!mips_wait_flag) | |
2160 | return; | |
2161 | ||
2162 | interrupt_count++; | |
2163 | ||
2164 | if (interrupt_count >= 2) | |
2165 | { | |
2166 | interrupt_count = 0; | |
2167 | ||
2168 | target_terminal_ours (); | |
2169 | ||
2170 | if (query ("Interrupted while waiting for the program.\n\ | |
2171 | Give up (and stop debugging it)? ")) | |
2172 | { | |
2173 | /* Clean up in such a way that mips_close won't try to talk to the | |
2174 | board (it almost surely won't work since we weren't able to talk to | |
2175 | it). */ | |
2176 | mips_wait_flag = 0; | |
c5aa993b | 2177 | close_ports (); |
c906108c SS |
2178 | |
2179 | printf_unfiltered ("Ending remote MIPS debugging.\n"); | |
2180 | target_mourn_inferior (); | |
2181 | ||
b5a2688f | 2182 | throw_exception (RETURN_QUIT); |
c906108c SS |
2183 | } |
2184 | ||
2185 | target_terminal_inferior (); | |
2186 | } | |
2187 | ||
2188 | if (remote_debug > 0) | |
2189 | printf_unfiltered ("Sending break\n"); | |
2190 | ||
2cd58942 | 2191 | serial_send_break (mips_desc); |
c906108c SS |
2192 | |
2193 | #if 0 | |
2194 | if (mips_is_open) | |
2195 | { | |
2196 | char cc; | |
2197 | ||
2198 | /* Send a ^C. */ | |
2199 | cc = '\003'; | |
2cd58942 | 2200 | serial_write (mips_desc, &cc, 1); |
c906108c SS |
2201 | sleep (1); |
2202 | target_mourn_inferior (); | |
2203 | } | |
2204 | #endif | |
2205 | } | |
2206 | ||
2207 | /* Start running on the target board. */ | |
2208 | ||
2209 | static void | |
fba45db2 | 2210 | mips_create_inferior (char *execfile, char *args, char **env) |
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 | ||
39f77062 | 2229 | /* FIXME: Should we set inferior_ptid here? */ |
c906108c SS |
2230 | |
2231 | proceed (entry_pt, TARGET_SIGNAL_DEFAULT, 0); | |
2232 | } | |
2233 | ||
2234 | /* Clean up after a process. Actually nothing to do. */ | |
2235 | ||
2236 | static void | |
fba45db2 | 2237 | mips_mourn_inferior (void) |
c906108c SS |
2238 | { |
2239 | if (current_ops != NULL) | |
2240 | unpush_target (current_ops); | |
2241 | generic_mourn_inferior (); | |
2242 | } | |
2243 | \f | |
2244 | /* We can write a breakpoint and read the shadow contents in one | |
2245 | operation. */ | |
2246 | ||
aaab4dba AC |
2247 | /* Insert a breakpoint. On targets that don't have built-in |
2248 | breakpoint support, we read the contents of the target location and | |
2249 | stash it, then overwrite it with a breakpoint instruction. ADDR is | |
2250 | the target location in the target machine. CONTENTS_CACHE is a | |
2251 | pointer to memory allocated for saving the target contents. It is | |
2252 | guaranteed by the caller to be long enough to save the breakpoint | |
2253 | length returned by BREAKPOINT_FROM_PC. */ | |
c906108c SS |
2254 | |
2255 | static int | |
fba45db2 | 2256 | mips_insert_breakpoint (CORE_ADDR addr, char *contents_cache) |
c906108c SS |
2257 | { |
2258 | if (monitor_supports_breakpoints) | |
2259 | return set_breakpoint (addr, MIPS_INSTLEN, BREAK_FETCH); | |
2260 | else | |
2261 | return memory_insert_breakpoint (addr, contents_cache); | |
2262 | } | |
2263 | ||
2264 | static int | |
fba45db2 | 2265 | mips_remove_breakpoint (CORE_ADDR addr, char *contents_cache) |
c906108c SS |
2266 | { |
2267 | if (monitor_supports_breakpoints) | |
2268 | return clear_breakpoint (addr, MIPS_INSTLEN, BREAK_FETCH); | |
2269 | else | |
2270 | return memory_remove_breakpoint (addr, contents_cache); | |
2271 | } | |
2272 | ||
c5aa993b | 2273 | #if 0 /* currently not used */ |
c906108c SS |
2274 | /* PMON does not currently provide support for the debug mode 'b' |
2275 | commands to manipulate breakpoints. However, if we wanted to use | |
2276 | the monitor breakpoints (rather than the GDB BREAK_INSN version) | |
2277 | then this code performs the work needed to leave debug mode, | |
2278 | set/clear the breakpoint, and then return to debug mode. */ | |
2279 | ||
c5aa993b | 2280 | #define PMON_MAX_BP (33) /* 32 SW, 1 HW */ |
c906108c SS |
2281 | static CORE_ADDR mips_pmon_bp_info[PMON_MAX_BP]; |
2282 | /* NOTE: The code relies on this vector being zero-initialised by the system */ | |
2283 | ||
2284 | static int | |
fba45db2 | 2285 | pmon_insert_breakpoint (CORE_ADDR addr, char *contents_cache) |
c906108c SS |
2286 | { |
2287 | int status; | |
2288 | ||
2289 | if (monitor_supports_breakpoints) | |
2290 | { | |
c5aa993b | 2291 | char tbuff[12]; /* space for breakpoint command */ |
c906108c SS |
2292 | int bpnum; |
2293 | CORE_ADDR bpaddr; | |
2294 | ||
2295 | /* PMON does not support debug level breakpoint set/remove: */ | |
2296 | if (mips_exit_debug ()) | |
c5aa993b | 2297 | mips_error ("Failed to exit debug mode"); |
c906108c SS |
2298 | |
2299 | sprintf (tbuff, "b %08x\r", addr); | |
2300 | mips_send_command (tbuff, 0); | |
2301 | ||
2302 | mips_expect ("Bpt "); | |
2303 | ||
688991e6 | 2304 | if (!mips_getstring (tbuff, remote_timeout)) |
c5aa993b JM |
2305 | return 1; |
2306 | tbuff[2] = '\0'; /* terminate the string */ | |
c906108c | 2307 | if (sscanf (tbuff, "%d", &bpnum) != 1) |
c5aa993b JM |
2308 | { |
2309 | fprintf_unfiltered (gdb_stderr, | |
2310 | "Invalid decimal breakpoint number from target: %s\n", tbuff); | |
2311 | return 1; | |
2312 | } | |
c906108c SS |
2313 | |
2314 | mips_expect (" = "); | |
2315 | ||
2316 | /* Lead in the hex number we are expecting: */ | |
2317 | tbuff[0] = '0'; | |
2318 | tbuff[1] = 'x'; | |
2319 | ||
2320 | /* FIXME!! only 8 bytes! need to expand for Bfd64; | |
2321 | which targets return 64-bit addresses? PMON returns only 32! */ | |
2322 | if (!mips_getstring (&tbuff[2], 8)) | |
c5aa993b JM |
2323 | return 1; |
2324 | tbuff[10] = '\0'; /* terminate the string */ | |
c906108c SS |
2325 | |
2326 | if (sscanf (tbuff, "0x%08x", &bpaddr) != 1) | |
c5aa993b JM |
2327 | { |
2328 | fprintf_unfiltered (gdb_stderr, | |
2329 | "Invalid hex address from target: %s\n", tbuff); | |
2330 | return 1; | |
2331 | } | |
c906108c SS |
2332 | |
2333 | if (bpnum >= PMON_MAX_BP) | |
c5aa993b JM |
2334 | { |
2335 | fprintf_unfiltered (gdb_stderr, | |
c906108c | 2336 | "Error: Returned breakpoint number %d outside acceptable range (0..%d)\n", |
c5aa993b JM |
2337 | bpnum, PMON_MAX_BP - 1); |
2338 | return 1; | |
2339 | } | |
c906108c SS |
2340 | |
2341 | if (bpaddr != addr) | |
c5aa993b | 2342 | fprintf_unfiltered (gdb_stderr, "Warning: Breakpoint addresses do not match: 0x%x != 0x%x\n", addr, bpaddr); |
c906108c SS |
2343 | |
2344 | mips_pmon_bp_info[bpnum] = bpaddr; | |
2345 | ||
2346 | mips_expect ("\r\n"); | |
2347 | mips_expect (mips_monitor_prompt); | |
2348 | ||
2349 | mips_enter_debug (); | |
2350 | ||
2351 | return 0; | |
2352 | } | |
2353 | ||
2354 | return mips_store_word (addr, BREAK_INSN, contents_cache); | |
2355 | } | |
2356 | ||
2357 | static int | |
fba45db2 | 2358 | pmon_remove_breakpoint (CORE_ADDR addr, char *contents_cache) |
c906108c SS |
2359 | { |
2360 | if (monitor_supports_breakpoints) | |
2361 | { | |
2362 | int bpnum; | |
c5aa993b | 2363 | char tbuff[7]; /* enough for delete breakpoint command */ |
c906108c SS |
2364 | |
2365 | for (bpnum = 0; bpnum < PMON_MAX_BP; bpnum++) | |
c5aa993b JM |
2366 | if (mips_pmon_bp_info[bpnum] == addr) |
2367 | break; | |
c906108c SS |
2368 | |
2369 | if (bpnum >= PMON_MAX_BP) | |
c5aa993b JM |
2370 | { |
2371 | fprintf_unfiltered (gdb_stderr, | |
2372 | "pmon_remove_breakpoint: Failed to find breakpoint at address 0x%s\n", | |
2373 | paddr_nz (addr)); | |
2374 | return 1; | |
2375 | } | |
c906108c SS |
2376 | |
2377 | if (mips_exit_debug ()) | |
c5aa993b | 2378 | mips_error ("Failed to exit debug mode"); |
c906108c SS |
2379 | |
2380 | sprintf (tbuff, "db %02d\r", bpnum); | |
2381 | ||
2382 | mips_send_command (tbuff, -1); | |
2383 | /* NOTE: If the breakpoint does not exist then a "Bpt <dd> not | |
2384 | set" message will be returned. */ | |
2385 | ||
2386 | mips_enter_debug (); | |
2387 | ||
2388 | return 0; | |
2389 | } | |
2390 | ||
2391 | return target_write_memory (addr, contents_cache, BREAK_INSN_SIZE); | |
2392 | } | |
2393 | #endif | |
2394 | ||
2395 | ||
2396 | /* Tell whether this target can support a hardware breakpoint. CNT | |
2397 | is the number of hardware breakpoints already installed. This | |
2398 | implements the TARGET_CAN_USE_HARDWARE_WATCHPOINT macro. */ | |
2399 | ||
2400 | int | |
546143b6 | 2401 | mips_can_use_watchpoint (int type, int cnt, int othertype) |
c906108c | 2402 | { |
c5aa993b | 2403 | return cnt < MAX_LSI_BREAKPOINTS && strcmp (target_shortname, "lsi") == 0; |
c906108c SS |
2404 | } |
2405 | ||
2406 | ||
2407 | /* Compute a don't care mask for the region bounding ADDR and ADDR + LEN - 1. | |
2408 | This is used for memory ref breakpoints. */ | |
2409 | ||
2410 | static unsigned long | |
fba45db2 | 2411 | calculate_mask (CORE_ADDR addr, int len) |
c906108c SS |
2412 | { |
2413 | unsigned long mask; | |
2414 | int i; | |
2415 | ||
2416 | mask = addr ^ (addr + len - 1); | |
2417 | ||
2418 | for (i = 32; i >= 0; i--) | |
2419 | if (mask == 0) | |
2420 | break; | |
2421 | else | |
2422 | mask >>= 1; | |
2423 | ||
2424 | mask = (unsigned long) 0xffffffff >> i; | |
2425 | ||
2426 | return mask; | |
2427 | } | |
2428 | ||
2429 | ||
2430 | /* Insert a hardware breakpoint. This works only on LSI targets, which | |
2431 | implement ordinary breakpoints using hardware facilities. */ | |
2432 | ||
a78f21af | 2433 | static int |
fba45db2 | 2434 | remote_mips_insert_hw_breakpoint (CORE_ADDR addr, char *contents_cache) |
c906108c SS |
2435 | { |
2436 | if (strcmp (target_shortname, "lsi") == 0) | |
2437 | return mips_insert_breakpoint (addr, contents_cache); | |
2438 | else | |
2439 | return -1; | |
2440 | } | |
2441 | ||
2442 | ||
2443 | /* Remove a hardware breakpoint. This works only on LSI targets, which | |
2444 | implement ordinary breakpoints using hardware facilities. */ | |
2445 | ||
a78f21af | 2446 | static int |
fba45db2 | 2447 | remote_mips_remove_hw_breakpoint (CORE_ADDR addr, char *contents_cache) |
c906108c SS |
2448 | { |
2449 | if (strcmp (target_shortname, "lsi") == 0) | |
2450 | return mips_remove_breakpoint (addr, contents_cache); | |
2451 | else | |
2452 | return -1; | |
2453 | } | |
2454 | ||
2455 | /* Set a data watchpoint. ADDR and LEN should be obvious. TYPE is 0 | |
2456 | for a write watchpoint, 1 for a read watchpoint, or 2 for a read/write | |
2457 | watchpoint. */ | |
2458 | ||
2459 | int | |
546143b6 | 2460 | mips_insert_watchpoint (CORE_ADDR addr, int len, int type) |
c906108c SS |
2461 | { |
2462 | if (set_breakpoint (addr, len, type)) | |
2463 | return -1; | |
2464 | ||
2465 | return 0; | |
2466 | } | |
2467 | ||
2468 | int | |
546143b6 | 2469 | mips_remove_watchpoint (CORE_ADDR addr, int len, int type) |
c906108c SS |
2470 | { |
2471 | if (clear_breakpoint (addr, len, type)) | |
2472 | return -1; | |
2473 | ||
2474 | return 0; | |
2475 | } | |
2476 | ||
2477 | int | |
546143b6 | 2478 | mips_stopped_by_watchpoint (void) |
c906108c SS |
2479 | { |
2480 | return hit_watchpoint; | |
2481 | } | |
2482 | ||
2483 | ||
2484 | /* Insert a breakpoint. */ | |
2485 | ||
2486 | static int | |
fba45db2 | 2487 | set_breakpoint (CORE_ADDR addr, int len, enum break_type type) |
c906108c SS |
2488 | { |
2489 | return common_breakpoint (1, addr, len, type); | |
2490 | } | |
2491 | ||
2492 | ||
2493 | /* Clear a breakpoint. */ | |
2494 | ||
2495 | static int | |
fba45db2 | 2496 | clear_breakpoint (CORE_ADDR addr, int len, enum break_type type) |
c906108c SS |
2497 | { |
2498 | return common_breakpoint (0, addr, len, type); | |
2499 | } | |
2500 | ||
2501 | ||
2502 | /* Check the error code from the return packet for an LSI breakpoint | |
2503 | command. If there's no error, just return 0. If it's a warning, | |
2504 | print the warning text and return 0. If it's an error, print | |
2505 | the error text and return 1. <ADDR> is the address of the breakpoint | |
2506 | that was being set. <RERRFLG> is the error code returned by PMON. | |
2507 | This is a helper function for common_breakpoint. */ | |
2508 | ||
2509 | static int | |
fba45db2 | 2510 | check_lsi_error (CORE_ADDR addr, int rerrflg) |
c906108c SS |
2511 | { |
2512 | struct lsi_error *err; | |
2513 | char *saddr = paddr_nz (addr); /* printable address string */ | |
2514 | ||
2515 | if (rerrflg == 0) /* no error */ | |
2516 | return 0; | |
2517 | ||
2518 | /* Warnings can be ORed together, so check them all. */ | |
2519 | if (rerrflg & W_WARN) | |
2520 | { | |
2521 | if (monitor_warnings) | |
2522 | { | |
2523 | int found = 0; | |
2524 | for (err = lsi_warning_table; err->code != 0; err++) | |
2525 | { | |
2526 | if ((err->code & rerrflg) == err->code) | |
2527 | { | |
2528 | found = 1; | |
2529 | fprintf_unfiltered (gdb_stderr, | |
c5aa993b | 2530 | "common_breakpoint (0x%s): Warning: %s\n", |
c906108c SS |
2531 | saddr, |
2532 | err->string); | |
2533 | } | |
2534 | } | |
2535 | if (!found) | |
2536 | fprintf_unfiltered (gdb_stderr, | |
c5aa993b | 2537 | "common_breakpoint (0x%s): Unknown warning: 0x%x\n", |
c906108c SS |
2538 | saddr, |
2539 | rerrflg); | |
2540 | } | |
2541 | return 0; | |
2542 | } | |
2543 | ||
2544 | /* Errors are unique, i.e. can't be ORed together. */ | |
2545 | for (err = lsi_error_table; err->code != 0; err++) | |
2546 | { | |
2547 | if ((err->code & rerrflg) == err->code) | |
2548 | { | |
2549 | fprintf_unfiltered (gdb_stderr, | |
2550 | "common_breakpoint (0x%s): Error: %s\n", | |
2551 | saddr, | |
2552 | err->string); | |
2553 | return 1; | |
2554 | } | |
2555 | } | |
2556 | fprintf_unfiltered (gdb_stderr, | |
2557 | "common_breakpoint (0x%s): Unknown error: 0x%x\n", | |
2558 | saddr, | |
2559 | rerrflg); | |
2560 | return 1; | |
2561 | } | |
2562 | ||
2563 | ||
2564 | /* This routine sends a breakpoint command to the remote target. | |
2565 | ||
2566 | <SET> is 1 if setting a breakpoint, or 0 if clearing a breakpoint. | |
2567 | <ADDR> is the address of the breakpoint. | |
2568 | <LEN> the length of the region to break on. | |
2569 | <TYPE> is the type of breakpoint: | |
c5aa993b JM |
2570 | 0 = write (BREAK_WRITE) |
2571 | 1 = read (BREAK_READ) | |
2572 | 2 = read/write (BREAK_ACCESS) | |
2573 | 3 = instruction fetch (BREAK_FETCH) | |
c906108c SS |
2574 | |
2575 | Return 0 if successful; otherwise 1. */ | |
2576 | ||
2577 | static int | |
fba45db2 | 2578 | common_breakpoint (int set, CORE_ADDR addr, int len, enum break_type type) |
c906108c SS |
2579 | { |
2580 | char buf[DATA_MAXLEN + 1]; | |
2581 | char cmd, rcmd; | |
2582 | int rpid, rerrflg, rresponse, rlen; | |
2583 | int nfields; | |
2584 | ||
2585 | addr = ADDR_BITS_REMOVE (addr); | |
2586 | ||
2587 | if (mips_monitor == MON_LSI) | |
2588 | { | |
c5aa993b | 2589 | if (set == 0) /* clear breakpoint */ |
c906108c SS |
2590 | { |
2591 | /* The LSI PMON "clear breakpoint" has this form: | |
c5aa993b JM |
2592 | <pid> 'b' <bptn> 0x0 |
2593 | reply: | |
2594 | <pid> 'b' 0x0 <code> | |
c906108c SS |
2595 | |
2596 | <bptn> is a breakpoint number returned by an earlier 'B' command. | |
2597 | Possible return codes: OK, E_BPT. */ | |
2598 | ||
2599 | int i; | |
2600 | ||
2601 | /* Search for the breakpoint in the table. */ | |
2602 | for (i = 0; i < MAX_LSI_BREAKPOINTS; i++) | |
2603 | if (lsi_breakpoints[i].type == type | |
2604 | && lsi_breakpoints[i].addr == addr | |
2605 | && lsi_breakpoints[i].len == len) | |
2606 | break; | |
2607 | ||
2608 | /* Clear the table entry and tell PMON to clear the breakpoint. */ | |
2609 | if (i == MAX_LSI_BREAKPOINTS) | |
2610 | { | |
2611 | warning ("common_breakpoint: Attempt to clear bogus breakpoint at %s\n", | |
2612 | paddr_nz (addr)); | |
2613 | return 1; | |
2614 | } | |
2615 | ||
2616 | lsi_breakpoints[i].type = BREAK_UNUSED; | |
2617 | sprintf (buf, "0x0 b 0x%x 0x0", i); | |
2618 | mips_send_packet (buf, 1); | |
2619 | ||
2620 | rlen = mips_receive_packet (buf, 1, mips_receive_wait); | |
2621 | buf[rlen] = '\0'; | |
2622 | ||
2623 | nfields = sscanf (buf, "0x%x b 0x0 0x%x", &rpid, &rerrflg); | |
2624 | if (nfields != 2) | |
2625 | mips_error ("common_breakpoint: Bad response from remote board: %s", buf); | |
2626 | ||
2627 | return (check_lsi_error (addr, rerrflg)); | |
2628 | } | |
c5aa993b JM |
2629 | else |
2630 | /* set a breakpoint */ | |
c906108c SS |
2631 | { |
2632 | /* The LSI PMON "set breakpoint" command has this form: | |
c5aa993b JM |
2633 | <pid> 'B' <addr> 0x0 |
2634 | reply: | |
2635 | <pid> 'B' <bptn> <code> | |
c906108c SS |
2636 | |
2637 | The "set data breakpoint" command has this form: | |
2638 | ||
c5aa993b | 2639 | <pid> 'A' <addr1> <type> [<addr2> [<value>]] |
c906108c | 2640 | |
c5aa993b JM |
2641 | where: type= "0x1" = read |
2642 | "0x2" = write | |
2643 | "0x3" = access (read or write) | |
c906108c SS |
2644 | |
2645 | The reply returns two values: | |
c5aa993b JM |
2646 | bptn - a breakpoint number, which is a small integer with |
2647 | possible values of zero through 255. | |
2648 | code - an error return code, a value of zero indicates a | |
2649 | succesful completion, other values indicate various | |
2650 | errors and warnings. | |
2651 | ||
c906108c SS |
2652 | Possible return codes: OK, W_QAL, E_QAL, E_OUT, E_NON. |
2653 | ||
c5aa993b | 2654 | */ |
c906108c SS |
2655 | |
2656 | if (type == BREAK_FETCH) /* instruction breakpoint */ | |
2657 | { | |
2658 | cmd = 'B'; | |
2659 | sprintf (buf, "0x0 B 0x%s 0x0", paddr_nz (addr)); | |
2660 | } | |
c5aa993b JM |
2661 | else |
2662 | /* watchpoint */ | |
c906108c SS |
2663 | { |
2664 | cmd = 'A'; | |
2665 | sprintf (buf, "0x0 A 0x%s 0x%x 0x%s", paddr_nz (addr), | |
c5aa993b | 2666 | type == BREAK_READ ? 1 : (type == BREAK_WRITE ? 2 : 3), |
c906108c SS |
2667 | paddr_nz (addr + len - 1)); |
2668 | } | |
2669 | mips_send_packet (buf, 1); | |
2670 | ||
2671 | rlen = mips_receive_packet (buf, 1, mips_receive_wait); | |
2672 | buf[rlen] = '\0'; | |
2673 | ||
2674 | nfields = sscanf (buf, "0x%x %c 0x%x 0x%x", | |
2675 | &rpid, &rcmd, &rresponse, &rerrflg); | |
2676 | if (nfields != 4 || rcmd != cmd || rresponse > 255) | |
2677 | mips_error ("common_breakpoint: Bad response from remote board: %s", buf); | |
2678 | ||
2679 | if (rerrflg != 0) | |
2680 | if (check_lsi_error (addr, rerrflg)) | |
2681 | return 1; | |
2682 | ||
2683 | /* rresponse contains PMON's breakpoint number. Record the | |
2684 | information for this breakpoint so we can clear it later. */ | |
2685 | lsi_breakpoints[rresponse].type = type; | |
2686 | lsi_breakpoints[rresponse].addr = addr; | |
c5aa993b | 2687 | lsi_breakpoints[rresponse].len = len; |
c906108c SS |
2688 | |
2689 | return 0; | |
2690 | } | |
2691 | } | |
2692 | else | |
2693 | { | |
2694 | /* On non-LSI targets, the breakpoint command has this form: | |
c5aa993b JM |
2695 | 0x0 <CMD> <ADDR> <MASK> <FLAGS> |
2696 | <MASK> is a don't care mask for addresses. | |
2697 | <FLAGS> is any combination of `r', `w', or `f' for read/write/fetch. | |
c906108c SS |
2698 | */ |
2699 | unsigned long mask; | |
2700 | ||
2701 | mask = calculate_mask (addr, len); | |
2702 | addr &= ~mask; | |
2703 | ||
c5aa993b JM |
2704 | if (set) /* set a breakpoint */ |
2705 | { | |
c906108c SS |
2706 | char *flags; |
2707 | switch (type) | |
2708 | { | |
c5aa993b | 2709 | case BREAK_WRITE: /* write */ |
c906108c SS |
2710 | flags = "w"; |
2711 | break; | |
c5aa993b | 2712 | case BREAK_READ: /* read */ |
c906108c SS |
2713 | flags = "r"; |
2714 | break; | |
c5aa993b | 2715 | case BREAK_ACCESS: /* read/write */ |
c906108c SS |
2716 | flags = "rw"; |
2717 | break; | |
c5aa993b | 2718 | case BREAK_FETCH: /* fetch */ |
c906108c SS |
2719 | flags = "f"; |
2720 | break; | |
2721 | default: | |
e1e9e218 | 2722 | internal_error (__FILE__, __LINE__, "failed internal consistency check"); |
c906108c SS |
2723 | } |
2724 | ||
2725 | cmd = 'B'; | |
2726 | sprintf (buf, "0x0 B 0x%s 0x%s %s", paddr_nz (addr), | |
2727 | paddr_nz (mask), flags); | |
2728 | } | |
2729 | else | |
2730 | { | |
2731 | cmd = 'b'; | |
2732 | sprintf (buf, "0x0 b 0x%s", paddr_nz (addr)); | |
2733 | } | |
2734 | ||
2735 | mips_send_packet (buf, 1); | |
2736 | ||
2737 | rlen = mips_receive_packet (buf, 1, mips_receive_wait); | |
2738 | buf[rlen] = '\0'; | |
2739 | ||
2740 | nfields = sscanf (buf, "0x%x %c 0x%x 0x%x", | |
2741 | &rpid, &rcmd, &rerrflg, &rresponse); | |
2742 | ||
2743 | if (nfields != 4 || rcmd != cmd) | |
2744 | mips_error ("common_breakpoint: Bad response from remote board: %s", | |
2745 | buf); | |
2746 | ||
2747 | if (rerrflg != 0) | |
2748 | { | |
2749 | /* Ddb returns "0x0 b 0x16 0x0\000", whereas | |
2750 | Cogent returns "0x0 b 0xffffffff 0x16\000": */ | |
2751 | if (mips_monitor == MON_DDB) | |
2752 | rresponse = rerrflg; | |
c5aa993b | 2753 | if (rresponse != 22) /* invalid argument */ |
c906108c | 2754 | fprintf_unfiltered (gdb_stderr, |
c5aa993b | 2755 | "common_breakpoint (0x%s): Got error: 0x%x\n", |
c906108c SS |
2756 | paddr_nz (addr), rresponse); |
2757 | return 1; | |
2758 | } | |
2759 | } | |
2760 | return 0; | |
2761 | } | |
2762 | \f | |
2763 | static void | |
fba45db2 | 2764 | send_srec (char *srec, int len, CORE_ADDR addr) |
c906108c SS |
2765 | { |
2766 | while (1) | |
2767 | { | |
2768 | int ch; | |
2769 | ||
2cd58942 | 2770 | serial_write (mips_desc, srec, len); |
c906108c | 2771 | |
688991e6 | 2772 | ch = mips_readchar (remote_timeout); |
c906108c SS |
2773 | |
2774 | switch (ch) | |
2775 | { | |
2776 | case SERIAL_TIMEOUT: | |
2777 | error ("Timeout during download."); | |
2778 | break; | |
2779 | case 0x6: /* ACK */ | |
2780 | return; | |
2781 | case 0x15: /* NACK */ | |
d4f3574e | 2782 | fprintf_unfiltered (gdb_stderr, "Download got a NACK at byte %s! Retrying.\n", paddr_u (addr)); |
c906108c SS |
2783 | continue; |
2784 | default: | |
2785 | error ("Download got unexpected ack char: 0x%x, retrying.\n", ch); | |
2786 | } | |
2787 | } | |
2788 | } | |
2789 | ||
2790 | /* Download a binary file by converting it to S records. */ | |
2791 | ||
2792 | static void | |
fba45db2 | 2793 | mips_load_srec (char *args) |
c906108c SS |
2794 | { |
2795 | bfd *abfd; | |
2796 | asection *s; | |
2797 | char *buffer, srec[1024]; | |
2798 | unsigned int i; | |
2799 | unsigned int srec_frame = 200; | |
2800 | int reclen; | |
2801 | static int hashmark = 1; | |
2802 | ||
2803 | buffer = alloca (srec_frame * 2 + 256); | |
2804 | ||
2805 | abfd = bfd_openr (args, 0); | |
2806 | if (!abfd) | |
2807 | { | |
2808 | printf_filtered ("Unable to open file %s\n", args); | |
2809 | return; | |
2810 | } | |
2811 | ||
2812 | if (bfd_check_format (abfd, bfd_object) == 0) | |
2813 | { | |
2814 | printf_filtered ("File is not an object file\n"); | |
2815 | return; | |
2816 | } | |
2817 | ||
2818 | /* This actually causes a download in the IDT binary format: */ | |
2819 | mips_send_command (LOAD_CMD, 0); | |
2820 | ||
2821 | for (s = abfd->sections; s; s = s->next) | |
2822 | { | |
2823 | if (s->flags & SEC_LOAD) | |
2824 | { | |
2825 | unsigned int numbytes; | |
2826 | ||
d4f3574e SS |
2827 | /* FIXME! vma too small????? */ |
2828 | printf_filtered ("%s\t: 0x%4lx .. 0x%4lx ", s->name, | |
2829 | (long) s->vma, | |
2830 | (long) (s->vma + s->_raw_size)); | |
c906108c SS |
2831 | gdb_flush (gdb_stdout); |
2832 | ||
2833 | for (i = 0; i < s->_raw_size; i += numbytes) | |
2834 | { | |
2835 | numbytes = min (srec_frame, s->_raw_size - i); | |
2836 | ||
2837 | bfd_get_section_contents (abfd, s, buffer, i, numbytes); | |
2838 | ||
2839 | reclen = mips_make_srec (srec, '3', s->vma + i, buffer, numbytes); | |
2840 | send_srec (srec, reclen, s->vma + i); | |
2841 | ||
7829b833 MH |
2842 | if (ui_load_progress_hook) |
2843 | ui_load_progress_hook (s->name, i); | |
2844 | ||
c906108c SS |
2845 | if (hashmark) |
2846 | { | |
2847 | putchar_unfiltered ('#'); | |
2848 | gdb_flush (gdb_stdout); | |
2849 | } | |
2850 | ||
c5aa993b JM |
2851 | } /* Per-packet (or S-record) loop */ |
2852 | ||
c906108c | 2853 | putchar_unfiltered ('\n'); |
c5aa993b | 2854 | } /* Loadable sections */ |
c906108c | 2855 | } |
c5aa993b | 2856 | if (hashmark) |
c906108c | 2857 | putchar_unfiltered ('\n'); |
c5aa993b | 2858 | |
c906108c SS |
2859 | /* Write a type 7 terminator record. no data for a type 7, and there |
2860 | is no data, so len is 0. */ | |
2861 | ||
2862 | reclen = mips_make_srec (srec, '7', abfd->start_address, NULL, 0); | |
2863 | ||
2864 | send_srec (srec, reclen, abfd->start_address); | |
2865 | ||
2cd58942 | 2866 | serial_flush_input (mips_desc); |
c906108c SS |
2867 | } |
2868 | ||
2869 | /* | |
2870 | * mips_make_srec -- make an srecord. This writes each line, one at a | |
c5aa993b JM |
2871 | * time, each with it's own header and trailer line. |
2872 | * An srecord looks like this: | |
c906108c SS |
2873 | * |
2874 | * byte count-+ address | |
2875 | * start ---+ | | data +- checksum | |
c5aa993b JM |
2876 | * | | | | |
2877 | * S01000006F6B692D746573742E73726563E4 | |
2878 | * S315000448600000000000000000FC00005900000000E9 | |
2879 | * S31A0004000023C1400037DE00F023604000377B009020825000348D | |
2880 | * S30B0004485A0000000000004E | |
2881 | * S70500040000F6 | |
c906108c | 2882 | * |
c5aa993b | 2883 | * S<type><length><address><data><checksum> |
c906108c SS |
2884 | * |
2885 | * Where | |
2886 | * - length | |
2887 | * is the number of bytes following upto the checksum. Note that | |
2888 | * this is not the number of chars following, since it takes two | |
2889 | * chars to represent a byte. | |
2890 | * - type | |
2891 | * is one of: | |
2892 | * 0) header record | |
2893 | * 1) two byte address data record | |
2894 | * 2) three byte address data record | |
2895 | * 3) four byte address data record | |
2896 | * 7) four byte address termination record | |
2897 | * 8) three byte address termination record | |
2898 | * 9) two byte address termination record | |
2899 | * | |
2900 | * - address | |
2901 | * is the start address of the data following, or in the case of | |
2902 | * a termination record, the start address of the image | |
2903 | * - data | |
2904 | * is the data. | |
2905 | * - checksum | |
c5aa993b | 2906 | * is the sum of all the raw byte data in the record, from the length |
c906108c SS |
2907 | * upwards, modulo 256 and subtracted from 255. |
2908 | * | |
2909 | * This routine returns the length of the S-record. | |
2910 | * | |
2911 | */ | |
2912 | ||
2913 | static int | |
fba45db2 KB |
2914 | mips_make_srec (char *buf, int type, CORE_ADDR memaddr, unsigned char *myaddr, |
2915 | int len) | |
c906108c SS |
2916 | { |
2917 | unsigned char checksum; | |
2918 | int i; | |
2919 | ||
2920 | /* Create the header for the srec. addr_size is the number of bytes in the address, | |
2921 | and 1 is the number of bytes in the count. */ | |
2922 | ||
2923 | /* FIXME!! bigger buf required for 64-bit! */ | |
2924 | buf[0] = 'S'; | |
2925 | buf[1] = type; | |
2926 | buf[2] = len + 4 + 1; /* len + 4 byte address + 1 byte checksum */ | |
2927 | /* This assumes S3 style downloads (4byte addresses). There should | |
2928 | probably be a check, or the code changed to make it more | |
2929 | explicit. */ | |
2930 | buf[3] = memaddr >> 24; | |
2931 | buf[4] = memaddr >> 16; | |
2932 | buf[5] = memaddr >> 8; | |
2933 | buf[6] = memaddr; | |
2934 | memcpy (&buf[7], myaddr, len); | |
2935 | ||
2936 | /* Note that the checksum is calculated on the raw data, not the | |
2937 | hexified data. It includes the length, address and the data | |
2938 | portions of the packet. */ | |
2939 | checksum = 0; | |
2940 | buf += 2; /* Point at length byte */ | |
2941 | for (i = 0; i < len + 4 + 1; i++) | |
2942 | checksum += *buf++; | |
2943 | ||
2944 | *buf = ~checksum; | |
2945 | ||
2946 | return len + 8; | |
2947 | } | |
2948 | ||
2949 | /* The following manifest controls whether we enable the simple flow | |
2950 | control support provided by the monitor. If enabled the code will | |
2951 | wait for an affirmative ACK between transmitting packets. */ | |
2952 | #define DOETXACK (1) | |
2953 | ||
2954 | /* The PMON fast-download uses an encoded packet format constructed of | |
2955 | 3byte data packets (encoded as 4 printable ASCII characters), and | |
2956 | escape sequences (preceded by a '/'): | |
2957 | ||
c5aa993b JM |
2958 | 'K' clear checksum |
2959 | 'C' compare checksum (12bit value, not included in checksum calculation) | |
2960 | 'S' define symbol name (for addr) terminated with "," and padded to 4char boundary | |
2961 | 'Z' zero fill multiple of 3bytes | |
2962 | 'B' byte (12bit encoded value, of 8bit data) | |
2963 | 'A' address (36bit encoded value) | |
2964 | 'E' define entry as original address, and exit load | |
c906108c SS |
2965 | |
2966 | The packets are processed in 4 character chunks, so the escape | |
2967 | sequences that do not have any data (or variable length data) | |
2968 | should be padded to a 4 character boundary. The decoder will give | |
2969 | an error if the complete message block size is not a multiple of | |
2970 | 4bytes (size of record). | |
2971 | ||
2972 | The encoding of numbers is done in 6bit fields. The 6bit value is | |
2973 | used to index into this string to get the specific character | |
2974 | encoding for the value: */ | |
2975 | static char encoding[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789,."; | |
2976 | ||
2977 | /* Convert the number of bits required into an encoded number, 6bits | |
2978 | at a time (range 0..63). Keep a checksum if required (passed | |
2979 | pointer non-NULL). The function returns the number of encoded | |
2980 | characters written into the buffer. */ | |
2981 | static int | |
fba45db2 | 2982 | pmon_makeb64 (unsigned long v, char *p, int n, int *chksum) |
c906108c SS |
2983 | { |
2984 | int count = (n / 6); | |
2985 | ||
c5aa993b JM |
2986 | if ((n % 12) != 0) |
2987 | { | |
2988 | fprintf_unfiltered (gdb_stderr, | |
2989 | "Fast encoding bitcount must be a multiple of 12bits: %dbit%s\n", n, (n == 1) ? "" : "s"); | |
2990 | return (0); | |
2991 | } | |
2992 | if (n > 36) | |
2993 | { | |
2994 | fprintf_unfiltered (gdb_stderr, | |
2995 | "Fast encoding cannot process more than 36bits at the moment: %dbits\n", n); | |
2996 | return (0); | |
2997 | } | |
c906108c SS |
2998 | |
2999 | /* Deal with the checksum: */ | |
c5aa993b JM |
3000 | if (chksum != NULL) |
3001 | { | |
3002 | switch (n) | |
3003 | { | |
3004 | case 36: | |
3005 | *chksum += ((v >> 24) & 0xFFF); | |
3006 | case 24: | |
3007 | *chksum += ((v >> 12) & 0xFFF); | |
3008 | case 12: | |
3009 | *chksum += ((v >> 0) & 0xFFF); | |
3010 | } | |
c906108c | 3011 | } |
c906108c | 3012 | |
c5aa993b JM |
3013 | do |
3014 | { | |
3015 | n -= 6; | |
3016 | *p++ = encoding[(v >> n) & 0x3F]; | |
3017 | } | |
3018 | while (n > 0); | |
c906108c | 3019 | |
c5aa993b | 3020 | return (count); |
c906108c SS |
3021 | } |
3022 | ||
3023 | /* Shorthand function (that could be in-lined) to output the zero-fill | |
3024 | escape sequence into the data stream. */ | |
3025 | static int | |
fba45db2 | 3026 | pmon_zeroset (int recsize, char **buff, int *amount, unsigned int *chksum) |
c906108c SS |
3027 | { |
3028 | int count; | |
3029 | ||
c5aa993b | 3030 | sprintf (*buff, "/Z"); |
c906108c SS |
3031 | count = pmon_makeb64 (*amount, (*buff + 2), 12, chksum); |
3032 | *buff += (count + 2); | |
3033 | *amount = 0; | |
c5aa993b | 3034 | return (recsize + count + 2); |
c906108c SS |
3035 | } |
3036 | ||
3037 | static int | |
fba45db2 | 3038 | pmon_checkset (int recsize, char **buff, int *value) |
c906108c SS |
3039 | { |
3040 | int count; | |
3041 | ||
3042 | /* Add the checksum (without updating the value): */ | |
3043 | sprintf (*buff, "/C"); | |
3044 | count = pmon_makeb64 (*value, (*buff + 2), 12, NULL); | |
3045 | *buff += (count + 2); | |
3046 | sprintf (*buff, "\n"); | |
c5aa993b | 3047 | *buff += 2; /* include zero terminator */ |
c906108c SS |
3048 | /* Forcing a checksum validation clears the sum: */ |
3049 | *value = 0; | |
c5aa993b | 3050 | return (recsize + count + 3); |
c906108c SS |
3051 | } |
3052 | ||
3053 | /* Amount of padding we leave after at the end of the output buffer, | |
3054 | for the checksum and line termination characters: */ | |
3055 | #define CHECKSIZE (4 + 4 + 4 + 2) | |
3056 | /* zero-fill, checksum, transfer end and line termination space. */ | |
3057 | ||
3058 | /* The amount of binary data loaded from the object file in a single | |
3059 | operation: */ | |
3060 | #define BINCHUNK (1024) | |
3061 | ||
3062 | /* Maximum line of data accepted by the monitor: */ | |
3063 | #define MAXRECSIZE (550) | |
3064 | /* NOTE: This constant depends on the monitor being used. This value | |
3065 | is for PMON 5.x on the Cogent Vr4300 board. */ | |
3066 | ||
3067 | static void | |
fba45db2 KB |
3068 | pmon_make_fastrec (char **outbuf, unsigned char *inbuf, int *inptr, |
3069 | int inamount, int *recsize, unsigned int *csum, | |
3070 | unsigned int *zerofill) | |
c906108c SS |
3071 | { |
3072 | int count = 0; | |
3073 | char *p = *outbuf; | |
3074 | ||
3075 | /* This is a simple check to ensure that our data will fit within | |
3076 | the maximum allowable record size. Each record output is 4bytes | |
3077 | in length. We must allow space for a pending zero fill command, | |
3078 | the record, and a checksum record. */ | |
c5aa993b JM |
3079 | while ((*recsize < (MAXRECSIZE - CHECKSIZE)) && ((inamount - *inptr) > 0)) |
3080 | { | |
3081 | /* Process the binary data: */ | |
3082 | if ((inamount - *inptr) < 3) | |
3083 | { | |
3084 | if (*zerofill != 0) | |
3085 | *recsize = pmon_zeroset (*recsize, &p, zerofill, csum); | |
3086 | sprintf (p, "/B"); | |
3087 | count = pmon_makeb64 (inbuf[*inptr], &p[2], 12, csum); | |
3088 | p += (2 + count); | |
3089 | *recsize += (2 + count); | |
3090 | (*inptr)++; | |
3091 | } | |
3092 | else | |
3093 | { | |
3094 | unsigned int value = ((inbuf[*inptr + 0] << 16) | (inbuf[*inptr + 1] << 8) | inbuf[*inptr + 2]); | |
3095 | /* Simple check for zero data. TODO: A better check would be | |
3096 | to check the last, and then the middle byte for being zero | |
3097 | (if the first byte is not). We could then check for | |
3098 | following runs of zeros, and if above a certain size it is | |
3099 | worth the 4 or 8 character hit of the byte insertions used | |
3100 | to pad to the start of the zeroes. NOTE: This also depends | |
3101 | on the alignment at the end of the zero run. */ | |
3102 | if (value == 0x00000000) | |
3103 | { | |
3104 | (*zerofill)++; | |
3105 | if (*zerofill == 0xFFF) /* 12bit counter */ | |
3106 | *recsize = pmon_zeroset (*recsize, &p, zerofill, csum); | |
3107 | } | |
3108 | else | |
3109 | { | |
3110 | if (*zerofill != 0) | |
3111 | *recsize = pmon_zeroset (*recsize, &p, zerofill, csum); | |
3112 | count = pmon_makeb64 (value, p, 24, csum); | |
3113 | p += count; | |
3114 | *recsize += count; | |
3115 | } | |
3116 | *inptr += 3; | |
3117 | } | |
c906108c | 3118 | } |
c906108c SS |
3119 | |
3120 | *outbuf = p; | |
3121 | return; | |
3122 | } | |
3123 | ||
3124 | static int | |
fba45db2 | 3125 | pmon_check_ack (char *mesg) |
c906108c SS |
3126 | { |
3127 | #if defined(DOETXACK) | |
3128 | int c; | |
3129 | ||
3130 | if (!tftp_in_use) | |
3131 | { | |
2cd58942 | 3132 | c = serial_readchar (udp_in_use ? udp_desc : mips_desc, |
688991e6 | 3133 | remote_timeout); |
c906108c SS |
3134 | if ((c == SERIAL_TIMEOUT) || (c != 0x06)) |
3135 | { | |
3136 | fprintf_unfiltered (gdb_stderr, | |
3137 | "Failed to receive valid ACK for %s\n", mesg); | |
c5aa993b | 3138 | return (-1); /* terminate the download */ |
c906108c SS |
3139 | } |
3140 | } | |
3141 | #endif /* DOETXACK */ | |
c5aa993b | 3142 | return (0); |
c906108c SS |
3143 | } |
3144 | ||
3145 | /* pmon_download - Send a sequence of characters to the PMON download port, | |
3146 | which is either a serial port or a UDP socket. */ | |
3147 | ||
3148 | static void | |
fba45db2 | 3149 | pmon_start_download (void) |
c906108c SS |
3150 | { |
3151 | if (tftp_in_use) | |
3152 | { | |
3153 | /* Create the temporary download file. */ | |
3154 | if ((tftp_file = fopen (tftp_localname, "w")) == NULL) | |
3155 | perror_with_name (tftp_localname); | |
3156 | } | |
3157 | else | |
3158 | { | |
3159 | mips_send_command (udp_in_use ? LOAD_CMD_UDP : LOAD_CMD, 0); | |
3160 | mips_expect ("Downloading from "); | |
3161 | mips_expect (udp_in_use ? "udp" : "tty0"); | |
3162 | mips_expect (", ^C to abort\r\n"); | |
3163 | } | |
3164 | } | |
3165 | ||
3166 | static int | |
3167 | mips_expect_download (char *string) | |
3168 | { | |
3169 | if (!mips_expect (string)) | |
3170 | { | |
3171 | fprintf_unfiltered (gdb_stderr, "Load did not complete successfully.\n"); | |
3172 | if (tftp_in_use) | |
3173 | remove (tftp_localname); /* Remove temporary file */ | |
3174 | return 0; | |
3175 | } | |
3176 | else | |
3177 | return 1; | |
3178 | } | |
3179 | ||
688991e6 AC |
3180 | static void |
3181 | pmon_check_entry_address (char *entry_address, int final) | |
3182 | { | |
3183 | char hexnumber[9]; /* includes '\0' space */ | |
3184 | mips_expect_timeout (entry_address, tftp_in_use ? 15 : remote_timeout); | |
3185 | sprintf (hexnumber, "%x", final); | |
3186 | mips_expect (hexnumber); | |
3187 | mips_expect ("\r\n"); | |
3188 | } | |
3189 | ||
3190 | static int | |
3191 | pmon_check_total (int bintotal) | |
3192 | { | |
3193 | char hexnumber[9]; /* includes '\0' space */ | |
3194 | mips_expect ("\r\ntotal = 0x"); | |
3195 | sprintf (hexnumber, "%x", bintotal); | |
3196 | mips_expect (hexnumber); | |
3197 | return mips_expect_download (" bytes\r\n"); | |
3198 | } | |
3199 | ||
c906108c | 3200 | static void |
fba45db2 | 3201 | pmon_end_download (int final, int bintotal) |
c906108c | 3202 | { |
c5aa993b | 3203 | char hexnumber[9]; /* includes '\0' space */ |
c906108c SS |
3204 | |
3205 | if (tftp_in_use) | |
3206 | { | |
3207 | static char *load_cmd_prefix = "load -b -s "; | |
3208 | char *cmd; | |
3209 | struct stat stbuf; | |
3210 | ||
3211 | /* Close off the temporary file containing the load data. */ | |
3212 | fclose (tftp_file); | |
3213 | tftp_file = NULL; | |
3214 | ||
3215 | /* Make the temporary file readable by the world. */ | |
3216 | if (stat (tftp_localname, &stbuf) == 0) | |
3217 | chmod (tftp_localname, stbuf.st_mode | S_IROTH); | |
3218 | ||
3219 | /* Must reinitialize the board to prevent PMON from crashing. */ | |
3220 | mips_send_command ("initEther\r", -1); | |
3221 | ||
3222 | /* Send the load command. */ | |
3223 | cmd = xmalloc (strlen (load_cmd_prefix) + strlen (tftp_name) + 2); | |
3224 | strcpy (cmd, load_cmd_prefix); | |
3225 | strcat (cmd, tftp_name); | |
3226 | strcat (cmd, "\r"); | |
3227 | mips_send_command (cmd, 0); | |
b8c9b27d | 3228 | xfree (cmd); |
c906108c SS |
3229 | if (!mips_expect_download ("Downloading from ")) |
3230 | return; | |
3231 | if (!mips_expect_download (tftp_name)) | |
3232 | return; | |
3233 | if (!mips_expect_download (", ^C to abort\r\n")) | |
3234 | return; | |
3235 | } | |
3236 | ||
3237 | /* Wait for the stuff that PMON prints after the load has completed. | |
3238 | The timeout value for use in the tftp case (15 seconds) was picked | |
3239 | arbitrarily but might be too small for really large downloads. FIXME. */ | |
688991e6 | 3240 | switch (mips_monitor) |
c906108c | 3241 | { |
688991e6 AC |
3242 | case MON_LSI: |
3243 | pmon_check_ack ("termination"); | |
3244 | pmon_check_entry_address ("Entry address is ", final); | |
3245 | if (!pmon_check_total (bintotal)) | |
3246 | return; | |
3247 | break; | |
3248 | default: | |
3249 | pmon_check_entry_address ("Entry Address = ", final); | |
c906108c | 3250 | pmon_check_ack ("termination"); |
688991e6 AC |
3251 | if (!pmon_check_total (bintotal)) |
3252 | return; | |
3253 | break; | |
c906108c | 3254 | } |
c906108c SS |
3255 | |
3256 | if (tftp_in_use) | |
3257 | remove (tftp_localname); /* Remove temporary file */ | |
3258 | } | |
3259 | ||
3260 | static void | |
fba45db2 | 3261 | pmon_download (char *buffer, int length) |
c906108c SS |
3262 | { |
3263 | if (tftp_in_use) | |
3264 | fwrite (buffer, 1, length, tftp_file); | |
3265 | else | |
2cd58942 | 3266 | serial_write (udp_in_use ? udp_desc : mips_desc, buffer, length); |
c906108c SS |
3267 | } |
3268 | ||
3269 | static void | |
fba45db2 | 3270 | pmon_load_fast (char *file) |
c906108c SS |
3271 | { |
3272 | bfd *abfd; | |
3273 | asection *s; | |
3274 | unsigned char *binbuf; | |
3275 | char *buffer; | |
3276 | int reclen; | |
3277 | unsigned int csum = 0; | |
3278 | int hashmark = !tftp_in_use; | |
3279 | int bintotal = 0; | |
3280 | int final = 0; | |
3281 | int finished = 0; | |
3282 | ||
c5aa993b JM |
3283 | buffer = (char *) xmalloc (MAXRECSIZE + 1); |
3284 | binbuf = (unsigned char *) xmalloc (BINCHUNK); | |
c906108c | 3285 | |
c5aa993b | 3286 | abfd = bfd_openr (file, 0); |
c906108c | 3287 | if (!abfd) |
c5aa993b JM |
3288 | { |
3289 | printf_filtered ("Unable to open file %s\n", file); | |
3290 | return; | |
3291 | } | |
c906108c | 3292 | |
c5aa993b JM |
3293 | if (bfd_check_format (abfd, bfd_object) == 0) |
3294 | { | |
3295 | printf_filtered ("File is not an object file\n"); | |
3296 | return; | |
3297 | } | |
c906108c SS |
3298 | |
3299 | /* Setup the required download state: */ | |
3300 | mips_send_command ("set dlproto etxack\r", -1); | |
3301 | mips_send_command ("set dlecho off\r", -1); | |
3302 | /* NOTE: We get a "cannot set variable" message if the variable is | |
3303 | already defined to have the argument we give. The code doesn't | |
3304 | care, since it just scans to the next prompt anyway. */ | |
3305 | /* Start the download: */ | |
c5aa993b JM |
3306 | pmon_start_download (); |
3307 | ||
c906108c | 3308 | /* Zero the checksum */ |
c5aa993b JM |
3309 | sprintf (buffer, "/Kxx\n"); |
3310 | reclen = strlen (buffer); | |
c906108c | 3311 | pmon_download (buffer, reclen); |
c5aa993b | 3312 | finished = pmon_check_ack ("/Kxx"); |
c906108c SS |
3313 | |
3314 | for (s = abfd->sections; s && !finished; s = s->next) | |
c5aa993b JM |
3315 | if (s->flags & SEC_LOAD) /* only deal with loadable sections */ |
3316 | { | |
3317 | bintotal += s->_raw_size; | |
3318 | final = (s->vma + s->_raw_size); | |
3319 | ||
3320 | printf_filtered ("%s\t: 0x%4x .. 0x%4x ", s->name, (unsigned int) s->vma, | |
3321 | (unsigned int) (s->vma + s->_raw_size)); | |
3322 | gdb_flush (gdb_stdout); | |
3323 | ||
3324 | /* Output the starting address */ | |
3325 | sprintf (buffer, "/A"); | |
3326 | reclen = pmon_makeb64 (s->vma, &buffer[2], 36, &csum); | |
3327 | buffer[2 + reclen] = '\n'; | |
3328 | buffer[3 + reclen] = '\0'; | |
3329 | reclen += 3; /* for the initial escape code and carriage return */ | |
3330 | pmon_download (buffer, reclen); | |
3331 | finished = pmon_check_ack ("/A"); | |
3332 | ||
3333 | if (!finished) | |
3334 | { | |
3335 | unsigned int binamount; | |
3336 | unsigned int zerofill = 0; | |
3337 | char *bp = buffer; | |
3338 | unsigned int i; | |
3339 | ||
3340 | reclen = 0; | |
3341 | ||
3342 | for (i = 0; ((i < s->_raw_size) && !finished); i += binamount) | |
3343 | { | |
3344 | int binptr = 0; | |
3345 | ||
3346 | binamount = min (BINCHUNK, s->_raw_size - i); | |
3347 | ||
3348 | bfd_get_section_contents (abfd, s, binbuf, i, binamount); | |
3349 | ||
3350 | /* This keeps a rolling checksum, until we decide to output | |
3351 | the line: */ | |
3352 | for (; ((binamount - binptr) > 0);) | |
3353 | { | |
3354 | pmon_make_fastrec (&bp, binbuf, &binptr, binamount, &reclen, &csum, &zerofill); | |
3355 | if (reclen >= (MAXRECSIZE - CHECKSIZE)) | |
3356 | { | |
3357 | reclen = pmon_checkset (reclen, &bp, &csum); | |
3358 | pmon_download (buffer, reclen); | |
3359 | finished = pmon_check_ack ("data record"); | |
3360 | if (finished) | |
3361 | { | |
3362 | zerofill = 0; /* do not transmit pending zerofills */ | |
3363 | break; | |
3364 | } | |
3365 | ||
7829b833 MH |
3366 | if (ui_load_progress_hook) |
3367 | ui_load_progress_hook (s->name, i); | |
3368 | ||
c5aa993b JM |
3369 | if (hashmark) |
3370 | { | |
3371 | putchar_unfiltered ('#'); | |
3372 | gdb_flush (gdb_stdout); | |
3373 | } | |
3374 | ||
3375 | bp = buffer; | |
3376 | reclen = 0; /* buffer processed */ | |
3377 | } | |
3378 | } | |
3379 | } | |
3380 | ||
3381 | /* Ensure no out-standing zerofill requests: */ | |
3382 | if (zerofill != 0) | |
3383 | reclen = pmon_zeroset (reclen, &bp, &zerofill, &csum); | |
3384 | ||
3385 | /* and then flush the line: */ | |
3386 | if (reclen > 0) | |
3387 | { | |
3388 | reclen = pmon_checkset (reclen, &bp, &csum); | |
3389 | /* Currently pmon_checkset outputs the line terminator by | |
3390 | default, so we write out the buffer so far: */ | |
3391 | pmon_download (buffer, reclen); | |
3392 | finished = pmon_check_ack ("record remnant"); | |
3393 | } | |
3394 | } | |
3395 | ||
3396 | putchar_unfiltered ('\n'); | |
3397 | } | |
c906108c SS |
3398 | |
3399 | /* Terminate the transfer. We know that we have an empty output | |
3400 | buffer at this point. */ | |
c5aa993b | 3401 | sprintf (buffer, "/E/E\n"); /* include dummy padding characters */ |
c906108c SS |
3402 | reclen = strlen (buffer); |
3403 | pmon_download (buffer, reclen); | |
3404 | ||
c5aa993b JM |
3405 | if (finished) |
3406 | { /* Ignore the termination message: */ | |
2cd58942 | 3407 | serial_flush_input (udp_in_use ? udp_desc : mips_desc); |
c5aa993b JM |
3408 | } |
3409 | else | |
3410 | { /* Deal with termination message: */ | |
3411 | pmon_end_download (final, bintotal); | |
3412 | } | |
c906108c SS |
3413 | |
3414 | return; | |
3415 | } | |
3416 | ||
3417 | /* mips_load -- download a file. */ | |
3418 | ||
3419 | static void | |
fba45db2 | 3420 | mips_load (char *file, int from_tty) |
c906108c SS |
3421 | { |
3422 | /* Get the board out of remote debugging mode. */ | |
3423 | if (mips_exit_debug ()) | |
3424 | error ("mips_load: Couldn't get into monitor mode."); | |
3425 | ||
3426 | if (mips_monitor != MON_IDT) | |
c5aa993b | 3427 | pmon_load_fast (file); |
c906108c | 3428 | else |
c5aa993b | 3429 | mips_load_srec (file); |
c906108c SS |
3430 | |
3431 | mips_initialize (); | |
3432 | ||
3433 | /* Finally, make the PC point at the start address */ | |
3434 | if (mips_monitor != MON_IDT) | |
3435 | { | |
3436 | /* Work around problem where PMON monitor updates the PC after a load | |
c5aa993b JM |
3437 | to a different value than GDB thinks it has. The following ensures |
3438 | that the write_pc() WILL update the PC value: */ | |
8262ee23 | 3439 | deprecated_register_valid[PC_REGNUM] = 0; |
c906108c SS |
3440 | } |
3441 | if (exec_bfd) | |
3442 | write_pc (bfd_get_start_address (exec_bfd)); | |
3443 | ||
39f77062 | 3444 | inferior_ptid = null_ptid; /* No process now */ |
c906108c SS |
3445 | |
3446 | /* This is necessary because many things were based on the PC at the time that | |
3447 | we attached to the monitor, which is no longer valid now that we have loaded | |
3448 | new code (and just changed the PC). Another way to do this might be to call | |
3449 | normal_stop, except that the stack may not be valid, and things would get | |
3450 | horribly confused... */ | |
3451 | ||
3452 | clear_symtab_users (); | |
3453 | } | |
3454 | ||
3455 | ||
3456 | /* Pass the command argument as a packet to PMON verbatim. */ | |
3457 | ||
3458 | static void | |
fba45db2 | 3459 | pmon_command (char *args, int from_tty) |
c906108c SS |
3460 | { |
3461 | char buf[DATA_MAXLEN + 1]; | |
3462 | int rlen; | |
3463 | ||
3464 | sprintf (buf, "0x0 %s", args); | |
3465 | mips_send_packet (buf, 1); | |
3466 | printf_filtered ("Send packet: %s\n", buf); | |
3467 | ||
3468 | rlen = mips_receive_packet (buf, 1, mips_receive_wait); | |
3469 | buf[rlen] = '\0'; | |
3470 | printf_filtered ("Received packet: %s\n", buf); | |
3471 | } | |
3472 | \f | |
a78f21af AC |
3473 | extern initialize_file_ftype _initialize_remote_mips; /* -Wmissing-prototypes */ |
3474 | ||
c906108c | 3475 | void |
fba45db2 | 3476 | _initialize_remote_mips (void) |
c906108c SS |
3477 | { |
3478 | /* Initialize the fields in mips_ops that are common to all four targets. */ | |
3479 | mips_ops.to_longname = "Remote MIPS debugging over serial line"; | |
3480 | mips_ops.to_close = mips_close; | |
3481 | mips_ops.to_detach = mips_detach; | |
3482 | mips_ops.to_resume = mips_resume; | |
3483 | mips_ops.to_fetch_registers = mips_fetch_registers; | |
3484 | mips_ops.to_store_registers = mips_store_registers; | |
3485 | mips_ops.to_prepare_to_store = mips_prepare_to_store; | |
3486 | mips_ops.to_xfer_memory = mips_xfer_memory; | |
3487 | mips_ops.to_files_info = mips_files_info; | |
3488 | mips_ops.to_insert_breakpoint = mips_insert_breakpoint; | |
3489 | mips_ops.to_remove_breakpoint = mips_remove_breakpoint; | |
546143b6 AC |
3490 | mips_ops.to_insert_watchpoint = mips_insert_watchpoint; |
3491 | mips_ops.to_remove_watchpoint = mips_remove_watchpoint; | |
3492 | mips_ops.to_stopped_by_watchpoint = mips_stopped_by_watchpoint; | |
3493 | mips_ops.to_can_use_hw_breakpoint = mips_can_use_watchpoint; | |
c906108c SS |
3494 | mips_ops.to_kill = mips_kill; |
3495 | mips_ops.to_load = mips_load; | |
3496 | mips_ops.to_create_inferior = mips_create_inferior; | |
3497 | mips_ops.to_mourn_inferior = mips_mourn_inferior; | |
3498 | mips_ops.to_stratum = process_stratum; | |
3499 | mips_ops.to_has_all_memory = 1; | |
3500 | mips_ops.to_has_memory = 1; | |
3501 | mips_ops.to_has_stack = 1; | |
3502 | mips_ops.to_has_registers = 1; | |
3503 | mips_ops.to_has_execution = 1; | |
3504 | mips_ops.to_magic = OPS_MAGIC; | |
3505 | ||
3506 | /* Copy the common fields to all four target vectors. */ | |
3507 | pmon_ops = ddb_ops = lsi_ops = mips_ops; | |
3508 | ||
3509 | /* Initialize target-specific fields in the target vectors. */ | |
3510 | mips_ops.to_shortname = "mips"; | |
3511 | mips_ops.to_doc = "\ | |
3512 | Debug a board using the MIPS remote debugging protocol over a serial line.\n\ | |
3513 | The argument is the device it is connected to or, if it contains a colon,\n\ | |
3514 | HOST:PORT to access a board over a network"; | |
3515 | mips_ops.to_open = mips_open; | |
3516 | mips_ops.to_wait = mips_wait; | |
3517 | ||
3518 | pmon_ops.to_shortname = "pmon"; | |
c5aa993b | 3519 | pmon_ops.to_doc = "\ |
c906108c SS |
3520 | Debug a board using the PMON MIPS remote debugging protocol over a serial\n\ |
3521 | line. The argument is the device it is connected to or, if it contains a\n\ | |
3522 | colon, HOST:PORT to access a board over a network"; | |
3523 | pmon_ops.to_open = pmon_open; | |
3524 | pmon_ops.to_wait = mips_wait; | |
3525 | ||
3526 | ddb_ops.to_shortname = "ddb"; | |
3527 | ddb_ops.to_doc = "\ | |
3528 | Debug a board using the PMON MIPS remote debugging protocol over a serial\n\ | |
3529 | line. The first argument is the device it is connected to or, if it contains\n\ | |
3530 | a colon, HOST:PORT to access a board over a network. The optional second\n\ | |
3531 | parameter is the temporary file in the form HOST:FILENAME to be used for\n\ | |
3532 | TFTP downloads to the board. The optional third parameter is the local name\n\ | |
3533 | of the TFTP temporary file, if it differs from the filename seen by the board."; | |
3534 | ddb_ops.to_open = ddb_open; | |
3535 | ddb_ops.to_wait = mips_wait; | |
3536 | ||
3537 | lsi_ops.to_shortname = "lsi"; | |
3538 | lsi_ops.to_doc = pmon_ops.to_doc; | |
3539 | lsi_ops.to_open = lsi_open; | |
3540 | lsi_ops.to_wait = mips_wait; | |
3541 | ||
3542 | /* Add the targets. */ | |
3543 | add_target (&mips_ops); | |
3544 | add_target (&pmon_ops); | |
3545 | add_target (&ddb_ops); | |
3546 | add_target (&lsi_ops); | |
3547 | ||
3548 | add_show_from_set ( | |
c5aa993b JM |
3549 | add_set_cmd ("timeout", no_class, var_zinteger, |
3550 | (char *) &mips_receive_wait, | |
3551 | "Set timeout in seconds for remote MIPS serial I/O.", | |
3552 | &setlist), | |
3553 | &showlist); | |
c906108c SS |
3554 | |
3555 | add_show_from_set ( | |
c5aa993b JM |
3556 | add_set_cmd ("retransmit-timeout", no_class, var_zinteger, |
3557 | (char *) &mips_retransmit_wait, | |
3558 | "Set retransmit timeout in seconds for remote MIPS serial I/O.\n\ | |
c906108c SS |
3559 | This is the number of seconds to wait for an acknowledgement to a packet\n\ |
3560 | before resending the packet.", &setlist), | |
c5aa993b | 3561 | &showlist); |
c906108c SS |
3562 | |
3563 | add_show_from_set ( | |
c5aa993b JM |
3564 | add_set_cmd ("syn-garbage-limit", no_class, var_zinteger, |
3565 | (char *) &mips_syn_garbage, | |
3566 | "Set the maximum number of characters to ignore when scanning for a SYN.\n\ | |
c906108c SS |
3567 | This is the maximum number of characters GDB will ignore when trying to\n\ |
3568 | synchronize with the remote system. A value of -1 means that there is no limit\n\ | |
3569 | (Note that these characters are printed out even though they are ignored.)", | |
c5aa993b JM |
3570 | &setlist), |
3571 | &showlist); | |
c906108c SS |
3572 | |
3573 | add_show_from_set | |
3574 | (add_set_cmd ("monitor-prompt", class_obscure, var_string, | |
3575 | (char *) &mips_monitor_prompt, | |
3576 | "Set the prompt that GDB expects from the monitor.", | |
3577 | &setlist), | |
3578 | &showlist); | |
3579 | ||
3580 | add_show_from_set ( | |
c5aa993b JM |
3581 | add_set_cmd ("monitor-warnings", class_obscure, var_zinteger, |
3582 | (char *) &monitor_warnings, | |
3583 | "Set printing of monitor warnings.\n" | |
3584 | "When enabled, monitor warnings about hardware breakpoints " | |
3585 | "will be displayed.", | |
3586 | &setlist), | |
3587 | &showlist); | |
c906108c SS |
3588 | |
3589 | add_com ("pmon <command>", class_obscure, pmon_command, | |
c5aa993b | 3590 | "Send a packet to PMON (must be in debug mode)."); |
4014092b AC |
3591 | |
3592 | add_show_from_set (add_set_cmd ("mask-address", no_class, | |
3593 | var_boolean, &mask_address_p, | |
3594 | "Set zeroing of upper 32 bits of 64-bit addresses when talking to PMON targets.\n\ | |
3595 | Use \"on\" to enable the masking and \"off\" to disable it.\n", | |
3596 | &setlist), | |
3597 | &showlist); | |
c906108c | 3598 | } |