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, | |
2c500098 | 4 | 2002, 2003, 2004 Free Software Foundation, Inc. |
0a65a603 | 5 | |
c906108c SS |
6 | Contributed by Cygnus Support. Written by Ian Lance Taylor |
7 | <ian@cygnus.com>. | |
8 | ||
c5aa993b | 9 | This file is part of GDB. |
c906108c | 10 | |
c5aa993b JM |
11 | This program is free software; you can redistribute it and/or modify |
12 | it under the terms of the GNU General Public License as published by | |
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" | |
60250e8b | 34 | #include "exceptions.h" |
c906108c SS |
35 | #include "remote-utils.h" |
36 | #include "gdb_string.h" | |
ba79cc81 | 37 | #include "gdb_stat.h" |
4e052eda | 38 | #include "regcache.h" |
59d521c1 | 39 | #include <ctype.h> |
56cea623 | 40 | #include "mips-tdep.h" |
c906108c | 41 | \f |
c5aa993b | 42 | |
c906108c SS |
43 | /* Breakpoint types. Values 0, 1, and 2 must agree with the watch |
44 | types passed by breakpoint.c to target_insert_watchpoint. | |
45 | Value 3 is our own invention, and is used for ordinary instruction | |
46 | breakpoints. Value 4 is used to mark an unused watchpoint in tables. */ | |
c5aa993b JM |
47 | enum break_type |
48 | { | |
49 | BREAK_WRITE, /* 0 */ | |
50 | BREAK_READ, /* 1 */ | |
51 | BREAK_ACCESS, /* 2 */ | |
52 | BREAK_FETCH, /* 3 */ | |
53 | BREAK_UNUSED /* 4 */ | |
54 | }; | |
c906108c SS |
55 | |
56 | /* Prototypes for local functions. */ | |
57 | ||
a14ed312 | 58 | static int mips_readchar (int timeout); |
c906108c | 59 | |
a14ed312 KB |
60 | static int mips_receive_header (unsigned char *hdr, int *pgarbage, |
61 | int ch, int timeout); | |
c906108c | 62 | |
a14ed312 KB |
63 | static int mips_receive_trailer (unsigned char *trlr, int *pgarbage, |
64 | int *pch, int timeout); | |
c906108c | 65 | |
a14ed312 KB |
66 | static int mips_cksum (const unsigned char *hdr, |
67 | const unsigned char *data, int len); | |
c906108c | 68 | |
a14ed312 | 69 | static void mips_send_packet (const char *s, int get_ack); |
c906108c | 70 | |
a14ed312 | 71 | static void mips_send_command (const char *cmd, int prompt); |
c906108c | 72 | |
a14ed312 | 73 | static int mips_receive_packet (char *buff, int throw_error, int timeout); |
c906108c | 74 | |
4014092b AC |
75 | static ULONGEST mips_request (int cmd, ULONGEST addr, ULONGEST data, |
76 | int *perr, int timeout, char *buff); | |
c906108c | 77 | |
a14ed312 | 78 | static void mips_initialize (void); |
c906108c | 79 | |
a14ed312 | 80 | static void mips_open (char *name, int from_tty); |
c906108c | 81 | |
a14ed312 | 82 | static void pmon_open (char *name, int from_tty); |
c906108c | 83 | |
a14ed312 | 84 | static void ddb_open (char *name, int from_tty); |
c906108c | 85 | |
a14ed312 | 86 | static void lsi_open (char *name, int from_tty); |
c906108c | 87 | |
a14ed312 | 88 | static void mips_close (int quitting); |
c906108c | 89 | |
a14ed312 | 90 | static void mips_detach (char *args, int from_tty); |
c906108c | 91 | |
39f77062 KB |
92 | static void mips_resume (ptid_t ptid, int step, |
93 | enum target_signal siggnal); | |
c906108c | 94 | |
39f77062 KB |
95 | static ptid_t mips_wait (ptid_t ptid, |
96 | struct target_waitstatus *status); | |
c906108c | 97 | |
a14ed312 | 98 | static int mips_map_regno (int regno); |
c906108c | 99 | |
a14ed312 | 100 | static void mips_fetch_registers (int regno); |
c906108c | 101 | |
a14ed312 | 102 | static void mips_prepare_to_store (void); |
c906108c | 103 | |
a14ed312 | 104 | static void mips_store_registers (int regno); |
c906108c | 105 | |
a14ed312 | 106 | static unsigned int mips_fetch_word (CORE_ADDR addr); |
c906108c | 107 | |
a14ed312 KB |
108 | static int mips_store_word (CORE_ADDR addr, unsigned int value, |
109 | char *old_contents); | |
c906108c | 110 | |
a14ed312 | 111 | static int mips_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, |
29e57380 C |
112 | int write, |
113 | struct mem_attrib *attrib, | |
114 | struct target_ops *target); | |
c906108c | 115 | |
a14ed312 | 116 | static void mips_files_info (struct target_ops *ignore); |
c906108c | 117 | |
a14ed312 | 118 | static void mips_mourn_inferior (void); |
c906108c | 119 | |
a14ed312 | 120 | static int pmon_makeb64 (unsigned long v, char *p, int n, int *chksum); |
c906108c | 121 | |
a14ed312 KB |
122 | static int pmon_zeroset (int recsize, char **buff, int *amount, |
123 | unsigned int *chksum); | |
c906108c | 124 | |
a14ed312 | 125 | static int pmon_checkset (int recsize, char **buff, int *value); |
c906108c | 126 | |
a14ed312 KB |
127 | static void pmon_make_fastrec (char **outbuf, unsigned char *inbuf, |
128 | int *inptr, int inamount, int *recsize, | |
129 | unsigned int *csum, unsigned int *zerofill); | |
c906108c | 130 | |
a14ed312 | 131 | static int pmon_check_ack (char *mesg); |
c906108c | 132 | |
a14ed312 | 133 | static void pmon_start_download (void); |
c906108c | 134 | |
a14ed312 | 135 | static void pmon_end_download (int final, int bintotal); |
c906108c | 136 | |
a14ed312 | 137 | static void pmon_download (char *buffer, int length); |
c906108c | 138 | |
a14ed312 | 139 | static void pmon_load_fast (char *file); |
c906108c | 140 | |
a14ed312 | 141 | static void mips_load (char *file, int from_tty); |
c906108c | 142 | |
a14ed312 KB |
143 | static int mips_make_srec (char *buffer, int type, CORE_ADDR memaddr, |
144 | unsigned char *myaddr, int len); | |
c906108c | 145 | |
a14ed312 | 146 | static int set_breakpoint (CORE_ADDR addr, int len, enum break_type type); |
c906108c | 147 | |
a14ed312 | 148 | static int clear_breakpoint (CORE_ADDR addr, int len, enum break_type type); |
c906108c | 149 | |
a14ed312 KB |
150 | static int common_breakpoint (int set, CORE_ADDR addr, int len, |
151 | enum break_type type); | |
c906108c SS |
152 | |
153 | /* Forward declarations. */ | |
154 | extern struct target_ops mips_ops; | |
155 | extern struct target_ops pmon_ops; | |
156 | extern struct target_ops ddb_ops; | |
c5aa993b | 157 | \f/* *INDENT-OFF* */ |
c906108c SS |
158 | /* The MIPS remote debugging interface is built on top of a simple |
159 | packet protocol. Each packet is organized as follows: | |
160 | ||
c5aa993b JM |
161 | SYN The first character is always a SYN (ASCII 026, or ^V). SYN |
162 | may not appear anywhere else in the packet. Any time a SYN is | |
163 | seen, a new packet should be assumed to have begun. | |
c906108c SS |
164 | |
165 | TYPE_LEN | |
c5aa993b JM |
166 | This byte contains the upper five bits of the logical length |
167 | of the data section, plus a single bit indicating whether this | |
168 | is a data packet or an acknowledgement. The documentation | |
169 | indicates that this bit is 1 for a data packet, but the actual | |
170 | board uses 1 for an acknowledgement. The value of the byte is | |
171 | 0x40 + (ack ? 0x20 : 0) + (len >> 6) | |
172 | (we always have 0 <= len < 1024). Acknowledgement packets do | |
173 | not carry data, and must have a data length of 0. | |
c906108c SS |
174 | |
175 | LEN1 This byte contains the lower six bits of the logical length of | |
c5aa993b JM |
176 | the data section. The value is |
177 | 0x40 + (len & 0x3f) | |
178 | ||
179 | SEQ This byte contains the six bit sequence number of the packet. | |
180 | The value is | |
181 | 0x40 + seq | |
182 | An acknowlegment packet contains the sequence number of the | |
183 | packet being acknowledged plus 1 modulo 64. Data packets are | |
184 | transmitted in sequence. There may only be one outstanding | |
185 | unacknowledged data packet at a time. The sequence numbers | |
186 | are independent in each direction. If an acknowledgement for | |
187 | the previous packet is received (i.e., an acknowledgement with | |
188 | the sequence number of the packet just sent) the packet just | |
189 | sent should be retransmitted. If no acknowledgement is | |
190 | received within a timeout period, the packet should be | |
191 | retransmitted. This has an unfortunate failure condition on a | |
192 | high-latency line, as a delayed acknowledgement may lead to an | |
193 | endless series of duplicate packets. | |
194 | ||
195 | DATA The actual data bytes follow. The following characters are | |
196 | escaped inline with DLE (ASCII 020, or ^P): | |
197 | SYN (026) DLE S | |
198 | DLE (020) DLE D | |
199 | ^C (003) DLE C | |
200 | ^S (023) DLE s | |
201 | ^Q (021) DLE q | |
202 | The additional DLE characters are not counted in the logical | |
203 | length stored in the TYPE_LEN and LEN1 bytes. | |
c906108c SS |
204 | |
205 | CSUM1 | |
206 | CSUM2 | |
207 | CSUM3 | |
c5aa993b JM |
208 | These bytes contain an 18 bit checksum of the complete |
209 | contents of the packet excluding the SEQ byte and the | |
210 | CSUM[123] bytes. The checksum is simply the twos complement | |
211 | addition of all the bytes treated as unsigned characters. The | |
212 | values of the checksum bytes are: | |
213 | CSUM1: 0x40 + ((cksum >> 12) & 0x3f) | |
214 | CSUM2: 0x40 + ((cksum >> 6) & 0x3f) | |
215 | CSUM3: 0x40 + (cksum & 0x3f) | |
c906108c SS |
216 | |
217 | It happens that the MIPS remote debugging protocol always | |
218 | communicates with ASCII strings. Because of this, this | |
219 | implementation doesn't bother to handle the DLE quoting mechanism, | |
220 | since it will never be required. */ | |
9846de1b | 221 | /* *INDENT-ON* */ |
c906108c | 222 | |
c5aa993b | 223 | |
c906108c SS |
224 | /* The SYN character which starts each packet. */ |
225 | #define SYN '\026' | |
226 | ||
227 | /* The 0x40 used to offset each packet (this value ensures that all of | |
228 | the header and trailer bytes, other than SYN, are printable ASCII | |
229 | characters). */ | |
230 | #define HDR_OFFSET 0x40 | |
231 | ||
232 | /* The indices of the bytes in the packet header. */ | |
233 | #define HDR_INDX_SYN 0 | |
234 | #define HDR_INDX_TYPE_LEN 1 | |
235 | #define HDR_INDX_LEN1 2 | |
236 | #define HDR_INDX_SEQ 3 | |
237 | #define HDR_LENGTH 4 | |
238 | ||
239 | /* The data/ack bit in the TYPE_LEN header byte. */ | |
240 | #define TYPE_LEN_DA_BIT 0x20 | |
241 | #define TYPE_LEN_DATA 0 | |
242 | #define TYPE_LEN_ACK TYPE_LEN_DA_BIT | |
243 | ||
244 | /* How to compute the header bytes. */ | |
245 | #define HDR_SET_SYN(data, len, seq) (SYN) | |
246 | #define HDR_SET_TYPE_LEN(data, len, seq) \ | |
247 | (HDR_OFFSET \ | |
248 | + ((data) ? TYPE_LEN_DATA : TYPE_LEN_ACK) \ | |
249 | + (((len) >> 6) & 0x1f)) | |
250 | #define HDR_SET_LEN1(data, len, seq) (HDR_OFFSET + ((len) & 0x3f)) | |
251 | #define HDR_SET_SEQ(data, len, seq) (HDR_OFFSET + (seq)) | |
252 | ||
253 | /* Check that a header byte is reasonable. */ | |
254 | #define HDR_CHECK(ch) (((ch) & HDR_OFFSET) == HDR_OFFSET) | |
255 | ||
256 | /* Get data from the header. These macros evaluate their argument | |
257 | multiple times. */ | |
258 | #define HDR_IS_DATA(hdr) \ | |
259 | (((hdr)[HDR_INDX_TYPE_LEN] & TYPE_LEN_DA_BIT) == TYPE_LEN_DATA) | |
260 | #define HDR_GET_LEN(hdr) \ | |
261 | ((((hdr)[HDR_INDX_TYPE_LEN] & 0x1f) << 6) + (((hdr)[HDR_INDX_LEN1] & 0x3f))) | |
262 | #define HDR_GET_SEQ(hdr) ((unsigned int)(hdr)[HDR_INDX_SEQ] & 0x3f) | |
263 | ||
264 | /* The maximum data length. */ | |
265 | #define DATA_MAXLEN 1023 | |
266 | ||
267 | /* The trailer offset. */ | |
268 | #define TRLR_OFFSET HDR_OFFSET | |
269 | ||
270 | /* The indices of the bytes in the packet trailer. */ | |
271 | #define TRLR_INDX_CSUM1 0 | |
272 | #define TRLR_INDX_CSUM2 1 | |
273 | #define TRLR_INDX_CSUM3 2 | |
274 | #define TRLR_LENGTH 3 | |
275 | ||
276 | /* How to compute the trailer bytes. */ | |
277 | #define TRLR_SET_CSUM1(cksum) (TRLR_OFFSET + (((cksum) >> 12) & 0x3f)) | |
278 | #define TRLR_SET_CSUM2(cksum) (TRLR_OFFSET + (((cksum) >> 6) & 0x3f)) | |
279 | #define TRLR_SET_CSUM3(cksum) (TRLR_OFFSET + (((cksum) ) & 0x3f)) | |
280 | ||
281 | /* Check that a trailer byte is reasonable. */ | |
282 | #define TRLR_CHECK(ch) (((ch) & TRLR_OFFSET) == TRLR_OFFSET) | |
283 | ||
284 | /* Get data from the trailer. This evaluates its argument multiple | |
285 | times. */ | |
286 | #define TRLR_GET_CKSUM(trlr) \ | |
287 | ((((trlr)[TRLR_INDX_CSUM1] & 0x3f) << 12) \ | |
288 | + (((trlr)[TRLR_INDX_CSUM2] & 0x3f) << 6) \ | |
289 | + ((trlr)[TRLR_INDX_CSUM3] & 0x3f)) | |
290 | ||
291 | /* The sequence number modulos. */ | |
292 | #define SEQ_MODULOS (64) | |
293 | ||
294 | /* PMON commands to load from the serial port or UDP socket. */ | |
295 | #define LOAD_CMD "load -b -s tty0\r" | |
296 | #define LOAD_CMD_UDP "load -b -s udp\r" | |
297 | ||
298 | /* The target vectors for the four different remote MIPS targets. | |
299 | These are initialized with code in _initialize_remote_mips instead | |
300 | of static initializers, to make it easier to extend the target_ops | |
301 | vector later. */ | |
302 | struct target_ops mips_ops, pmon_ops, ddb_ops, lsi_ops; | |
303 | ||
c5aa993b JM |
304 | enum mips_monitor_type |
305 | { | |
306 | /* IDT/SIM monitor being used: */ | |
307 | MON_IDT, | |
308 | /* PMON monitor being used: */ | |
309 | MON_PMON, /* 3.0.83 [COGENT,EB,FP,NET] Algorithmics Ltd. Nov 9 1995 17:19:50 */ | |
310 | MON_DDB, /* 2.7.473 [DDBVR4300,EL,FP,NET] Risq Modular Systems, Thu Jun 6 09:28:40 PDT 1996 */ | |
311 | MON_LSI, /* 4.3.12 [EB,FP], LSI LOGIC Corp. Tue Feb 25 13:22:14 1997 */ | |
312 | /* Last and unused value, for sizing vectors, etc. */ | |
313 | MON_LAST | |
314 | }; | |
c906108c SS |
315 | static enum mips_monitor_type mips_monitor = MON_LAST; |
316 | ||
317 | /* The monitor prompt text. If the user sets the PMON prompt | |
318 | to some new value, the GDB `set monitor-prompt' command must also | |
319 | be used to inform GDB about the expected prompt. Otherwise, GDB | |
320 | will not be able to connect to PMON in mips_initialize(). | |
321 | If the `set monitor-prompt' command is not used, the expected | |
322 | default prompt will be set according the target: | |
c5aa993b JM |
323 | target prompt |
324 | ----- ----- | |
325 | pmon PMON> | |
326 | ddb NEC010> | |
327 | lsi PMON> | |
328 | */ | |
c906108c SS |
329 | static char *mips_monitor_prompt; |
330 | ||
331 | /* Set to 1 if the target is open. */ | |
332 | static int mips_is_open; | |
333 | ||
334 | /* Currently active target description (if mips_is_open == 1) */ | |
335 | static struct target_ops *current_ops; | |
336 | ||
337 | /* Set to 1 while the connection is being initialized. */ | |
338 | static int mips_initializing; | |
339 | ||
340 | /* Set to 1 while the connection is being brought down. */ | |
341 | static int mips_exiting; | |
342 | ||
343 | /* The next sequence number to send. */ | |
344 | static unsigned int mips_send_seq; | |
345 | ||
346 | /* The next sequence number we expect to receive. */ | |
347 | static unsigned int mips_receive_seq; | |
348 | ||
349 | /* The time to wait before retransmitting a packet, in seconds. */ | |
350 | static int mips_retransmit_wait = 3; | |
351 | ||
352 | /* The number of times to try retransmitting a packet before giving up. */ | |
353 | static int mips_send_retries = 10; | |
354 | ||
355 | /* The number of garbage characters to accept when looking for an | |
356 | SYN for the next packet. */ | |
59d521c1 | 357 | static int mips_syn_garbage = 10; |
c906108c SS |
358 | |
359 | /* The time to wait for a packet, in seconds. */ | |
360 | static int mips_receive_wait = 5; | |
361 | ||
362 | /* Set if we have sent a packet to the board but have not yet received | |
363 | a reply. */ | |
364 | static int mips_need_reply = 0; | |
365 | ||
366 | /* Handle used to access serial I/O stream. */ | |
819cc324 | 367 | static struct serial *mips_desc; |
c906108c SS |
368 | |
369 | /* UDP handle used to download files to target. */ | |
819cc324 | 370 | static struct serial *udp_desc; |
c906108c SS |
371 | static int udp_in_use; |
372 | ||
373 | /* TFTP filename used to download files to DDB board, in the form | |
374 | host:filename. */ | |
375 | static char *tftp_name; /* host:filename */ | |
376 | static char *tftp_localname; /* filename portion of above */ | |
377 | static int tftp_in_use; | |
378 | static FILE *tftp_file; | |
379 | ||
380 | /* Counts the number of times the user tried to interrupt the target (usually | |
381 | via ^C. */ | |
382 | static int interrupt_count; | |
383 | ||
384 | /* If non-zero, means that the target is running. */ | |
385 | static int mips_wait_flag = 0; | |
386 | ||
387 | /* If non-zero, monitor supports breakpoint commands. */ | |
d4f3574e | 388 | static int monitor_supports_breakpoints = 0; |
c906108c SS |
389 | |
390 | /* Data cache header. */ | |
391 | ||
c5aa993b | 392 | #if 0 /* not used (yet?) */ |
c906108c SS |
393 | static DCACHE *mips_dcache; |
394 | #endif | |
395 | ||
396 | /* Non-zero means that we've just hit a read or write watchpoint */ | |
397 | static int hit_watchpoint; | |
398 | ||
399 | /* Table of breakpoints/watchpoints (used only on LSI PMON target). | |
400 | The table is indexed by a breakpoint number, which is an integer | |
401 | from 0 to 255 returned by the LSI PMON when a breakpoint is set. | |
c5aa993b | 402 | */ |
c906108c SS |
403 | #define MAX_LSI_BREAKPOINTS 256 |
404 | struct lsi_breakpoint_info | |
c5aa993b JM |
405 | { |
406 | enum break_type type; /* type of breakpoint */ | |
407 | CORE_ADDR addr; /* address of breakpoint */ | |
408 | int len; /* length of region being watched */ | |
409 | unsigned long value; /* value to watch */ | |
410 | } | |
411 | lsi_breakpoints[MAX_LSI_BREAKPOINTS]; | |
c906108c SS |
412 | |
413 | /* Error/warning codes returned by LSI PMON for breakpoint commands. | |
414 | Warning values may be ORed together; error values may not. */ | |
c5aa993b JM |
415 | #define W_WARN 0x100 /* This bit is set if the error code is a warning */ |
416 | #define W_MSK 0x101 /* warning: Range feature is supported via mask */ | |
417 | #define W_VAL 0x102 /* warning: Value check is not supported in hardware */ | |
418 | #define W_QAL 0x104 /* warning: Requested qualifiers are not supported in hardware */ | |
419 | ||
420 | #define E_ERR 0x200 /* This bit is set if the error code is an error */ | |
421 | #define E_BPT 0x200 /* error: No such breakpoint number */ | |
422 | #define E_RGE 0x201 /* error: Range is not supported */ | |
423 | #define E_QAL 0x202 /* error: The requested qualifiers can not be used */ | |
424 | #define E_OUT 0x203 /* error: Out of hardware resources */ | |
425 | #define E_NON 0x204 /* error: Hardware breakpoint not supported */ | |
c906108c SS |
426 | |
427 | struct lsi_error | |
c5aa993b JM |
428 | { |
429 | int code; /* error code */ | |
430 | char *string; /* string associated with this code */ | |
431 | }; | |
c906108c SS |
432 | |
433 | struct lsi_error lsi_warning_table[] = | |
434 | { | |
c5aa993b JM |
435 | {W_MSK, "Range feature is supported via mask"}, |
436 | {W_VAL, "Value check is not supported in hardware"}, | |
437 | {W_QAL, "Requested qualifiers are not supported in hardware"}, | |
438 | {0, NULL} | |
c906108c SS |
439 | }; |
440 | ||
441 | struct lsi_error lsi_error_table[] = | |
c5aa993b JM |
442 | { |
443 | {E_BPT, "No such breakpoint number"}, | |
444 | {E_RGE, "Range is not supported"}, | |
445 | {E_QAL, "The requested qualifiers can not be used"}, | |
446 | {E_OUT, "Out of hardware resources"}, | |
447 | {E_NON, "Hardware breakpoint not supported"}, | |
448 | {0, NULL} | |
c906108c SS |
449 | }; |
450 | ||
451 | /* Set to 1 with the 'set monitor-warnings' command to enable printing | |
452 | of warnings returned by PMON when hardware breakpoints are used. */ | |
453 | static int monitor_warnings; | |
454 | ||
455 | ||
456 | static void | |
fba45db2 | 457 | close_ports (void) |
c906108c SS |
458 | { |
459 | mips_is_open = 0; | |
2cd58942 | 460 | serial_close (mips_desc); |
c906108c SS |
461 | |
462 | if (udp_in_use) | |
463 | { | |
2cd58942 | 464 | serial_close (udp_desc); |
c906108c SS |
465 | udp_in_use = 0; |
466 | } | |
467 | tftp_in_use = 0; | |
468 | } | |
c5aa993b | 469 | |
c906108c SS |
470 | /* Handle low-level error that we can't recover from. Note that just |
471 | error()ing out from target_wait or some such low-level place will cause | |
472 | all hell to break loose--the rest of GDB will tend to get left in an | |
473 | inconsistent state. */ | |
474 | ||
475 | static NORETURN void | |
c5aa993b | 476 | mips_error (char *string,...) |
c906108c SS |
477 | { |
478 | va_list args; | |
479 | ||
c906108c | 480 | va_start (args, string); |
c5aa993b | 481 | |
c906108c | 482 | target_terminal_ours (); |
c5aa993b | 483 | wrap_here (""); /* Force out any buffered output */ |
c906108c SS |
484 | gdb_flush (gdb_stdout); |
485 | if (error_pre_print) | |
ab4e3d93 | 486 | fputs_filtered (error_pre_print, gdb_stderr); |
c906108c SS |
487 | vfprintf_filtered (gdb_stderr, string, args); |
488 | fprintf_filtered (gdb_stderr, "\n"); | |
489 | va_end (args); | |
490 | gdb_flush (gdb_stderr); | |
491 | ||
492 | /* Clean up in such a way that mips_close won't try to talk to the | |
493 | board (it almost surely won't work since we weren't able to talk to | |
494 | it). */ | |
495 | close_ports (); | |
496 | ||
497 | printf_unfiltered ("Ending remote MIPS debugging.\n"); | |
498 | target_mourn_inferior (); | |
499 | ||
b5a2688f | 500 | throw_exception (RETURN_ERROR); |
c906108c SS |
501 | } |
502 | ||
503 | /* putc_readable - print a character, displaying non-printable chars in | |
504 | ^x notation or in hex. */ | |
505 | ||
506 | static void | |
fba45db2 | 507 | fputc_readable (int ch, struct ui_file *file) |
c906108c SS |
508 | { |
509 | if (ch == '\n') | |
9846de1b | 510 | fputc_unfiltered ('\n', file); |
c906108c | 511 | else if (ch == '\r') |
9846de1b | 512 | fprintf_unfiltered (file, "\\r"); |
c5aa993b | 513 | else if (ch < 0x20) /* ASCII control character */ |
9846de1b | 514 | fprintf_unfiltered (file, "^%c", ch + '@'); |
c5aa993b | 515 | else if (ch >= 0x7f) /* non-ASCII characters (rubout or greater) */ |
9846de1b | 516 | fprintf_unfiltered (file, "[%02x]", ch & 0xff); |
c906108c | 517 | else |
9846de1b | 518 | fputc_unfiltered (ch, file); |
c906108c SS |
519 | } |
520 | ||
521 | ||
522 | /* puts_readable - print a string, displaying non-printable chars in | |
523 | ^x notation or in hex. */ | |
524 | ||
525 | static void | |
98691afe | 526 | fputs_readable (const char *string, struct ui_file *file) |
c906108c SS |
527 | { |
528 | int c; | |
529 | ||
530 | while ((c = *string++) != '\0') | |
9846de1b | 531 | fputc_readable (c, file); |
c906108c SS |
532 | } |
533 | ||
534 | ||
535 | /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if | |
536 | timed out. TIMEOUT specifies timeout value in seconds. | |
c5aa993b | 537 | */ |
c906108c | 538 | |
a78f21af | 539 | static int |
98691afe | 540 | mips_expect_timeout (const char *string, int timeout) |
c906108c | 541 | { |
98691afe | 542 | const char *p = string; |
c906108c SS |
543 | |
544 | if (remote_debug) | |
545 | { | |
9846de1b JM |
546 | fprintf_unfiltered (gdb_stdlog, "Expected \""); |
547 | fputs_readable (string, gdb_stdlog); | |
548 | fprintf_unfiltered (gdb_stdlog, "\", got \""); | |
c906108c SS |
549 | } |
550 | ||
8edbea78 | 551 | immediate_quit++; |
c906108c SS |
552 | while (1) |
553 | { | |
554 | int c; | |
555 | ||
2cd58942 AC |
556 | /* Must use serial_readchar() here cuz mips_readchar would get |
557 | confused if we were waiting for the mips_monitor_prompt... */ | |
c906108c | 558 | |
2cd58942 | 559 | c = serial_readchar (mips_desc, timeout); |
c906108c SS |
560 | |
561 | if (c == SERIAL_TIMEOUT) | |
562 | { | |
563 | if (remote_debug) | |
9846de1b | 564 | fprintf_unfiltered (gdb_stdlog, "\": FAIL\n"); |
c906108c SS |
565 | return 0; |
566 | } | |
567 | ||
568 | if (remote_debug) | |
9846de1b | 569 | fputc_readable (c, gdb_stdlog); |
c906108c SS |
570 | |
571 | if (c == *p++) | |
c5aa993b | 572 | { |
c906108c SS |
573 | if (*p == '\0') |
574 | { | |
8edbea78 | 575 | immediate_quit--; |
c906108c | 576 | if (remote_debug) |
9846de1b | 577 | fprintf_unfiltered (gdb_stdlog, "\": OK\n"); |
c906108c SS |
578 | return 1; |
579 | } | |
580 | } | |
581 | else | |
582 | { | |
583 | p = string; | |
584 | if (c == *p) | |
585 | p++; | |
586 | } | |
587 | } | |
588 | } | |
589 | ||
590 | /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if | |
591 | timed out. The timeout value is hard-coded to 2 seconds. Use | |
592 | mips_expect_timeout if a different timeout value is needed. | |
c5aa993b | 593 | */ |
c906108c | 594 | |
a78f21af | 595 | static int |
98691afe | 596 | mips_expect (const char *string) |
c906108c | 597 | { |
688991e6 | 598 | return mips_expect_timeout (string, remote_timeout); |
c906108c SS |
599 | } |
600 | ||
c906108c | 601 | /* Read a character from the remote, aborting on error. Returns |
2cd58942 AC |
602 | SERIAL_TIMEOUT on timeout (since that's what serial_readchar() |
603 | returns). FIXME: If we see the string mips_monitor_prompt from the | |
604 | board, then we are debugging on the main console port, and we have | |
605 | somehow dropped out of remote debugging mode. In this case, we | |
606 | automatically go back in to remote debugging mode. This is a hack, | |
607 | put in because I can't find any way for a program running on the | |
608 | remote board to terminate without also ending remote debugging | |
c906108c SS |
609 | mode. I assume users won't have any trouble with this; for one |
610 | thing, the IDT documentation generally assumes that the remote | |
611 | debugging port is not the console port. This is, however, very | |
612 | convenient for DejaGnu when you only have one connected serial | |
613 | port. */ | |
614 | ||
615 | static int | |
fba45db2 | 616 | mips_readchar (int timeout) |
c906108c SS |
617 | { |
618 | int ch; | |
619 | static int state = 0; | |
620 | int mips_monitor_prompt_len = strlen (mips_monitor_prompt); | |
621 | ||
c906108c SS |
622 | { |
623 | int i; | |
624 | ||
625 | i = timeout; | |
626 | if (i == -1 && watchdog > 0) | |
c5aa993b | 627 | i = watchdog; |
c906108c | 628 | } |
c906108c SS |
629 | |
630 | if (state == mips_monitor_prompt_len) | |
631 | timeout = 1; | |
2cd58942 | 632 | ch = serial_readchar (mips_desc, timeout); |
7a292a7a | 633 | |
c5aa993b | 634 | if (ch == SERIAL_TIMEOUT && timeout == -1) /* Watchdog went off */ |
c906108c SS |
635 | { |
636 | target_mourn_inferior (); | |
637 | error ("Watchdog has expired. Target detached.\n"); | |
638 | } | |
7a292a7a | 639 | |
c906108c SS |
640 | if (ch == SERIAL_EOF) |
641 | mips_error ("End of file from remote"); | |
642 | if (ch == SERIAL_ERROR) | |
643 | mips_error ("Error reading from remote: %s", safe_strerror (errno)); | |
644 | if (remote_debug > 1) | |
645 | { | |
646 | /* Don't use _filtered; we can't deal with a QUIT out of | |
c5aa993b | 647 | target_wait, and I think this might be called from there. */ |
c906108c | 648 | if (ch != SERIAL_TIMEOUT) |
9846de1b | 649 | fprintf_unfiltered (gdb_stdlog, "Read '%c' %d 0x%x\n", ch, ch, ch); |
c906108c | 650 | else |
9846de1b | 651 | fprintf_unfiltered (gdb_stdlog, "Timed out in read\n"); |
c906108c SS |
652 | } |
653 | ||
654 | /* If we have seen mips_monitor_prompt and we either time out, or | |
655 | we see a @ (which was echoed from a packet we sent), reset the | |
656 | board as described above. The first character in a packet after | |
657 | the SYN (which is not echoed) is always an @ unless the packet is | |
658 | more than 64 characters long, which ours never are. */ | |
659 | if ((ch == SERIAL_TIMEOUT || ch == '@') | |
660 | && state == mips_monitor_prompt_len | |
c5aa993b JM |
661 | && !mips_initializing |
662 | && !mips_exiting) | |
c906108c SS |
663 | { |
664 | if (remote_debug > 0) | |
665 | /* Don't use _filtered; we can't deal with a QUIT out of | |
666 | target_wait, and I think this might be called from there. */ | |
9846de1b | 667 | fprintf_unfiltered (gdb_stdlog, "Reinitializing MIPS debugging mode\n"); |
c906108c SS |
668 | |
669 | mips_need_reply = 0; | |
670 | mips_initialize (); | |
671 | ||
672 | state = 0; | |
673 | ||
674 | /* At this point, about the only thing we can do is abort the command | |
c5aa993b | 675 | in progress and get back to command level as quickly as possible. */ |
c906108c SS |
676 | |
677 | error ("Remote board reset, debug protocol re-initialized."); | |
678 | } | |
679 | ||
680 | if (ch == mips_monitor_prompt[state]) | |
681 | ++state; | |
682 | else | |
683 | state = 0; | |
684 | ||
685 | return ch; | |
686 | } | |
687 | ||
688 | /* Get a packet header, putting the data in the supplied buffer. | |
689 | PGARBAGE is a pointer to the number of garbage characters received | |
690 | so far. CH is the last character received. Returns 0 for success, | |
691 | or -1 for timeout. */ | |
692 | ||
693 | static int | |
fba45db2 | 694 | mips_receive_header (unsigned char *hdr, int *pgarbage, int ch, int timeout) |
c906108c SS |
695 | { |
696 | int i; | |
697 | ||
698 | while (1) | |
699 | { | |
700 | /* Wait for a SYN. mips_syn_garbage is intended to prevent | |
c5aa993b JM |
701 | sitting here indefinitely if the board sends us one garbage |
702 | character per second. ch may already have a value from the | |
703 | last time through the loop. */ | |
c906108c SS |
704 | while (ch != SYN) |
705 | { | |
706 | ch = mips_readchar (timeout); | |
707 | if (ch == SERIAL_TIMEOUT) | |
c5aa993b | 708 | return -1; |
c906108c SS |
709 | if (ch != SYN) |
710 | { | |
711 | /* Printing the character here lets the user of gdb see | |
c5aa993b | 712 | what the program is outputting, if the debugging is |
59d521c1 AC |
713 | being done on the console port. Don't use _filtered: |
714 | we can't deal with a QUIT out of target_wait and | |
715 | buffered target output confuses the user. */ | |
716 | if (!mips_initializing || remote_debug > 0) | |
717 | { | |
718 | if (isprint (ch) || isspace (ch)) | |
719 | { | |
720 | fputc_unfiltered (ch, gdb_stdtarg); | |
721 | } | |
722 | else | |
723 | { | |
724 | fputc_readable (ch, gdb_stdtarg); | |
725 | } | |
726 | gdb_flush (gdb_stdtarg); | |
727 | } | |
728 | ||
729 | /* Only count unprintable characters. */ | |
730 | if (! (isprint (ch) || isspace (ch))) | |
731 | (*pgarbage) += 1; | |
732 | ||
c906108c SS |
733 | if (mips_syn_garbage > 0 |
734 | && *pgarbage > mips_syn_garbage) | |
c5aa993b | 735 | mips_error ("Debug protocol failure: more than %d characters before a sync.", |
c906108c SS |
736 | mips_syn_garbage); |
737 | } | |
738 | } | |
739 | ||
740 | /* Get the packet header following the SYN. */ | |
741 | for (i = 1; i < HDR_LENGTH; i++) | |
742 | { | |
743 | ch = mips_readchar (timeout); | |
744 | if (ch == SERIAL_TIMEOUT) | |
c5aa993b | 745 | return -1; |
c906108c | 746 | /* Make sure this is a header byte. */ |
c5aa993b | 747 | if (ch == SYN || !HDR_CHECK (ch)) |
c906108c SS |
748 | break; |
749 | ||
750 | hdr[i] = ch; | |
751 | } | |
752 | ||
753 | /* If we got the complete header, we can return. Otherwise we | |
c5aa993b | 754 | loop around and keep looking for SYN. */ |
c906108c | 755 | if (i >= HDR_LENGTH) |
c5aa993b | 756 | return 0; |
c906108c SS |
757 | } |
758 | } | |
759 | ||
760 | /* Get a packet header, putting the data in the supplied buffer. | |
761 | PGARBAGE is a pointer to the number of garbage characters received | |
762 | so far. The last character read is returned in *PCH. Returns 0 | |
763 | for success, -1 for timeout, -2 for error. */ | |
764 | ||
765 | static int | |
fba45db2 | 766 | mips_receive_trailer (unsigned char *trlr, int *pgarbage, int *pch, int timeout) |
c906108c SS |
767 | { |
768 | int i; | |
769 | int ch; | |
770 | ||
771 | for (i = 0; i < TRLR_LENGTH; i++) | |
772 | { | |
773 | ch = mips_readchar (timeout); | |
774 | *pch = ch; | |
775 | if (ch == SERIAL_TIMEOUT) | |
776 | return -1; | |
c5aa993b | 777 | if (!TRLR_CHECK (ch)) |
c906108c SS |
778 | return -2; |
779 | trlr[i] = ch; | |
780 | } | |
781 | return 0; | |
782 | } | |
783 | ||
784 | /* Get the checksum of a packet. HDR points to the packet header. | |
785 | DATA points to the packet data. LEN is the length of DATA. */ | |
786 | ||
787 | static int | |
fba45db2 | 788 | mips_cksum (const unsigned char *hdr, const unsigned char *data, int len) |
c906108c | 789 | { |
52f0bd74 AC |
790 | const unsigned char *p; |
791 | int c; | |
792 | int cksum; | |
c906108c SS |
793 | |
794 | cksum = 0; | |
795 | ||
796 | /* The initial SYN is not included in the checksum. */ | |
797 | c = HDR_LENGTH - 1; | |
798 | p = hdr + 1; | |
799 | while (c-- != 0) | |
800 | cksum += *p++; | |
c5aa993b | 801 | |
c906108c SS |
802 | c = len; |
803 | p = data; | |
804 | while (c-- != 0) | |
805 | cksum += *p++; | |
806 | ||
807 | return cksum; | |
808 | } | |
809 | ||
810 | /* Send a packet containing the given ASCII string. */ | |
811 | ||
812 | static void | |
fba45db2 | 813 | mips_send_packet (const char *s, int get_ack) |
c906108c SS |
814 | { |
815 | /* unsigned */ int len; | |
816 | unsigned char *packet; | |
52f0bd74 | 817 | int cksum; |
c906108c SS |
818 | int try; |
819 | ||
820 | len = strlen (s); | |
821 | if (len > DATA_MAXLEN) | |
822 | mips_error ("MIPS protocol data packet too long: %s", s); | |
823 | ||
824 | packet = (unsigned char *) alloca (HDR_LENGTH + len + TRLR_LENGTH + 1); | |
825 | ||
826 | packet[HDR_INDX_SYN] = HDR_SET_SYN (1, len, mips_send_seq); | |
827 | packet[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (1, len, mips_send_seq); | |
828 | packet[HDR_INDX_LEN1] = HDR_SET_LEN1 (1, len, mips_send_seq); | |
829 | packet[HDR_INDX_SEQ] = HDR_SET_SEQ (1, len, mips_send_seq); | |
830 | ||
831 | memcpy (packet + HDR_LENGTH, s, len); | |
832 | ||
833 | cksum = mips_cksum (packet, packet + HDR_LENGTH, len); | |
834 | packet[HDR_LENGTH + len + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum); | |
835 | packet[HDR_LENGTH + len + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum); | |
836 | packet[HDR_LENGTH + len + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum); | |
837 | ||
838 | /* Increment the sequence number. This will set mips_send_seq to | |
839 | the sequence number we expect in the acknowledgement. */ | |
840 | mips_send_seq = (mips_send_seq + 1) % SEQ_MODULOS; | |
841 | ||
842 | /* We can only have one outstanding data packet, so we just wait for | |
843 | the acknowledgement here. Keep retransmitting the packet until | |
844 | we get one, or until we've tried too many times. */ | |
845 | for (try = 0; try < mips_send_retries; try++) | |
846 | { | |
847 | int garbage; | |
848 | int ch; | |
849 | ||
850 | if (remote_debug > 0) | |
851 | { | |
852 | /* Don't use _filtered; we can't deal with a QUIT out of | |
853 | target_wait, and I think this might be called from there. */ | |
854 | packet[HDR_LENGTH + len + TRLR_LENGTH] = '\0'; | |
9846de1b | 855 | fprintf_unfiltered (gdb_stdlog, "Writing \"%s\"\n", packet + 1); |
c906108c SS |
856 | } |
857 | ||
2cd58942 | 858 | if (serial_write (mips_desc, packet, |
c906108c SS |
859 | HDR_LENGTH + len + TRLR_LENGTH) != 0) |
860 | mips_error ("write to target failed: %s", safe_strerror (errno)); | |
861 | ||
c5aa993b | 862 | if (!get_ack) |
c906108c SS |
863 | return; |
864 | ||
865 | garbage = 0; | |
866 | ch = 0; | |
867 | while (1) | |
868 | { | |
869 | unsigned char hdr[HDR_LENGTH + 1]; | |
870 | unsigned char trlr[TRLR_LENGTH + 1]; | |
871 | int err; | |
872 | unsigned int seq; | |
873 | ||
874 | /* Get the packet header. If we time out, resend the data | |
875 | packet. */ | |
876 | err = mips_receive_header (hdr, &garbage, ch, mips_retransmit_wait); | |
877 | if (err != 0) | |
878 | break; | |
879 | ||
880 | ch = 0; | |
881 | ||
882 | /* If we get a data packet, assume it is a duplicate and | |
883 | ignore it. FIXME: If the acknowledgement is lost, this | |
884 | data packet may be the packet the remote sends after the | |
885 | acknowledgement. */ | |
c5aa993b JM |
886 | if (HDR_IS_DATA (hdr)) |
887 | { | |
888 | int i; | |
889 | ||
890 | /* Ignore any errors raised whilst attempting to ignore | |
891 | packet. */ | |
892 | ||
893 | len = HDR_GET_LEN (hdr); | |
894 | ||
895 | for (i = 0; i < len; i++) | |
896 | { | |
897 | int rch; | |
898 | ||
688991e6 | 899 | rch = mips_readchar (remote_timeout); |
c5aa993b JM |
900 | if (rch == SYN) |
901 | { | |
902 | ch = SYN; | |
903 | break; | |
904 | } | |
905 | if (rch == SERIAL_TIMEOUT) | |
906 | break; | |
907 | /* ignore the character */ | |
908 | } | |
909 | ||
910 | if (i == len) | |
688991e6 AC |
911 | (void) mips_receive_trailer (trlr, &garbage, &ch, |
912 | remote_timeout); | |
c5aa993b JM |
913 | |
914 | /* We don't bother checking the checksum, or providing an | |
915 | ACK to the packet. */ | |
916 | continue; | |
917 | } | |
c906108c SS |
918 | |
919 | /* If the length is not 0, this is a garbled packet. */ | |
920 | if (HDR_GET_LEN (hdr) != 0) | |
921 | continue; | |
922 | ||
923 | /* Get the packet trailer. */ | |
924 | err = mips_receive_trailer (trlr, &garbage, &ch, | |
925 | mips_retransmit_wait); | |
926 | ||
927 | /* If we timed out, resend the data packet. */ | |
928 | if (err == -1) | |
929 | break; | |
930 | ||
931 | /* If we got a bad character, reread the header. */ | |
932 | if (err != 0) | |
933 | continue; | |
934 | ||
935 | /* If the checksum does not match the trailer checksum, this | |
936 | is a bad packet; ignore it. */ | |
937 | if (mips_cksum (hdr, (unsigned char *) NULL, 0) | |
938 | != TRLR_GET_CKSUM (trlr)) | |
939 | continue; | |
940 | ||
941 | if (remote_debug > 0) | |
942 | { | |
943 | hdr[HDR_LENGTH] = '\0'; | |
944 | trlr[TRLR_LENGTH] = '\0'; | |
945 | /* Don't use _filtered; we can't deal with a QUIT out of | |
c5aa993b | 946 | target_wait, and I think this might be called from there. */ |
9846de1b JM |
947 | fprintf_unfiltered (gdb_stdlog, "Got ack %d \"%s%s\"\n", |
948 | HDR_GET_SEQ (hdr), hdr + 1, trlr); | |
c906108c SS |
949 | } |
950 | ||
951 | /* If this ack is for the current packet, we're done. */ | |
952 | seq = HDR_GET_SEQ (hdr); | |
953 | if (seq == mips_send_seq) | |
954 | return; | |
955 | ||
956 | /* If this ack is for the last packet, resend the current | |
957 | packet. */ | |
958 | if ((seq + 1) % SEQ_MODULOS == mips_send_seq) | |
959 | break; | |
960 | ||
961 | /* Otherwise this is a bad ack; ignore it. Increment the | |
962 | garbage count to ensure that we do not stay in this loop | |
963 | forever. */ | |
964 | ++garbage; | |
965 | } | |
966 | } | |
967 | ||
968 | mips_error ("Remote did not acknowledge packet"); | |
969 | } | |
970 | ||
971 | /* Receive and acknowledge a packet, returning the data in BUFF (which | |
972 | should be DATA_MAXLEN + 1 bytes). The protocol documentation | |
973 | implies that only the sender retransmits packets, so this code just | |
974 | waits silently for a packet. It returns the length of the received | |
975 | packet. If THROW_ERROR is nonzero, call error() on errors. If not, | |
976 | don't print an error message and return -1. */ | |
977 | ||
978 | static int | |
fba45db2 | 979 | mips_receive_packet (char *buff, int throw_error, int timeout) |
c906108c SS |
980 | { |
981 | int ch; | |
982 | int garbage; | |
983 | int len; | |
984 | unsigned char ack[HDR_LENGTH + TRLR_LENGTH + 1]; | |
985 | int cksum; | |
986 | ||
987 | ch = 0; | |
988 | garbage = 0; | |
989 | while (1) | |
990 | { | |
991 | unsigned char hdr[HDR_LENGTH]; | |
992 | unsigned char trlr[TRLR_LENGTH]; | |
993 | int i; | |
994 | int err; | |
995 | ||
996 | if (mips_receive_header (hdr, &garbage, ch, timeout) != 0) | |
997 | { | |
998 | if (throw_error) | |
999 | mips_error ("Timed out waiting for remote packet"); | |
1000 | else | |
1001 | return -1; | |
1002 | } | |
1003 | ||
1004 | ch = 0; | |
1005 | ||
1006 | /* An acknowledgement is probably a duplicate; ignore it. */ | |
c5aa993b | 1007 | if (!HDR_IS_DATA (hdr)) |
c906108c | 1008 | { |
c5aa993b JM |
1009 | len = HDR_GET_LEN (hdr); |
1010 | /* Check if the length is valid for an ACK, we may aswell | |
1011 | try and read the remainder of the packet: */ | |
1012 | if (len == 0) | |
1013 | { | |
1014 | /* Ignore the error condition, since we are going to | |
1015 | ignore the packet anyway. */ | |
1016 | (void) mips_receive_trailer (trlr, &garbage, &ch, timeout); | |
1017 | } | |
c906108c SS |
1018 | /* Don't use _filtered; we can't deal with a QUIT out of |
1019 | target_wait, and I think this might be called from there. */ | |
1020 | if (remote_debug > 0) | |
9846de1b | 1021 | fprintf_unfiltered (gdb_stdlog, "Ignoring unexpected ACK\n"); |
c906108c SS |
1022 | continue; |
1023 | } | |
1024 | ||
1025 | len = HDR_GET_LEN (hdr); | |
1026 | for (i = 0; i < len; i++) | |
1027 | { | |
1028 | int rch; | |
1029 | ||
1030 | rch = mips_readchar (timeout); | |
1031 | if (rch == SYN) | |
1032 | { | |
1033 | ch = SYN; | |
1034 | break; | |
1035 | } | |
1036 | if (rch == SERIAL_TIMEOUT) | |
1037 | { | |
1038 | if (throw_error) | |
1039 | mips_error ("Timed out waiting for remote packet"); | |
1040 | else | |
1041 | return -1; | |
1042 | } | |
1043 | buff[i] = rch; | |
1044 | } | |
1045 | ||
1046 | if (i < len) | |
1047 | { | |
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 JM |
1051 | fprintf_unfiltered (gdb_stdlog, |
1052 | "Got new SYN after %d chars (wanted %d)\n", | |
1053 | i, len); | |
c906108c SS |
1054 | continue; |
1055 | } | |
1056 | ||
1057 | err = mips_receive_trailer (trlr, &garbage, &ch, timeout); | |
1058 | if (err == -1) | |
1059 | { | |
1060 | if (throw_error) | |
1061 | mips_error ("Timed out waiting for packet"); | |
1062 | else | |
1063 | return -1; | |
1064 | } | |
1065 | if (err == -2) | |
1066 | { | |
1067 | /* Don't use _filtered; we can't deal with a QUIT out of | |
1068 | target_wait, and I think this might be called from there. */ | |
1069 | if (remote_debug > 0) | |
9846de1b | 1070 | fprintf_unfiltered (gdb_stdlog, "Got SYN when wanted trailer\n"); |
c906108c SS |
1071 | continue; |
1072 | } | |
1073 | ||
1074 | /* If this is the wrong sequence number, ignore it. */ | |
1075 | if (HDR_GET_SEQ (hdr) != mips_receive_seq) | |
1076 | { | |
1077 | /* Don't use _filtered; we can't deal with a QUIT out of | |
1078 | target_wait, and I think this might be called from there. */ | |
1079 | if (remote_debug > 0) | |
9846de1b | 1080 | fprintf_unfiltered (gdb_stdlog, |
c5aa993b JM |
1081 | "Ignoring sequence number %d (want %d)\n", |
1082 | HDR_GET_SEQ (hdr), mips_receive_seq); | |
c906108c SS |
1083 | continue; |
1084 | } | |
1085 | ||
1086 | if (mips_cksum (hdr, buff, len) == TRLR_GET_CKSUM (trlr)) | |
c5aa993b | 1087 | break; |
c906108c SS |
1088 | |
1089 | if (remote_debug > 0) | |
1090 | /* Don't use _filtered; we can't deal with a QUIT out of | |
1091 | target_wait, and I think this might be called from there. */ | |
1092 | printf_unfiltered ("Bad checksum; data %d, trailer %d\n", | |
c5aa993b JM |
1093 | mips_cksum (hdr, buff, len), |
1094 | TRLR_GET_CKSUM (trlr)); | |
c906108c SS |
1095 | |
1096 | /* The checksum failed. Send an acknowledgement for the | |
c5aa993b | 1097 | previous packet to tell the remote to resend the packet. */ |
c906108c SS |
1098 | ack[HDR_INDX_SYN] = HDR_SET_SYN (0, 0, mips_receive_seq); |
1099 | ack[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq); | |
1100 | ack[HDR_INDX_LEN1] = HDR_SET_LEN1 (0, 0, mips_receive_seq); | |
1101 | ack[HDR_INDX_SEQ] = HDR_SET_SEQ (0, 0, mips_receive_seq); | |
1102 | ||
1103 | cksum = mips_cksum (ack, (unsigned char *) NULL, 0); | |
1104 | ||
1105 | ack[HDR_LENGTH + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum); | |
1106 | ack[HDR_LENGTH + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum); | |
1107 | ack[HDR_LENGTH + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum); | |
1108 | ||
1109 | if (remote_debug > 0) | |
1110 | { | |
1111 | ack[HDR_LENGTH + TRLR_LENGTH] = '\0'; | |
1112 | /* Don't use _filtered; we can't deal with a QUIT out of | |
1113 | target_wait, and I think this might be called from there. */ | |
1114 | printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq, | |
c5aa993b | 1115 | ack + 1); |
c906108c SS |
1116 | } |
1117 | ||
2cd58942 | 1118 | if (serial_write (mips_desc, ack, HDR_LENGTH + TRLR_LENGTH) != 0) |
c906108c SS |
1119 | { |
1120 | if (throw_error) | |
1121 | mips_error ("write to target failed: %s", safe_strerror (errno)); | |
1122 | else | |
1123 | return -1; | |
1124 | } | |
1125 | } | |
1126 | ||
1127 | if (remote_debug > 0) | |
1128 | { | |
1129 | buff[len] = '\0'; | |
1130 | /* Don't use _filtered; we can't deal with a QUIT out of | |
c5aa993b | 1131 | target_wait, and I think this might be called from there. */ |
c906108c SS |
1132 | printf_unfiltered ("Got packet \"%s\"\n", buff); |
1133 | } | |
1134 | ||
1135 | /* We got the packet. Send an acknowledgement. */ | |
1136 | mips_receive_seq = (mips_receive_seq + 1) % SEQ_MODULOS; | |
1137 | ||
1138 | ack[HDR_INDX_SYN] = HDR_SET_SYN (0, 0, mips_receive_seq); | |
1139 | ack[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq); | |
1140 | ack[HDR_INDX_LEN1] = HDR_SET_LEN1 (0, 0, mips_receive_seq); | |
1141 | ack[HDR_INDX_SEQ] = HDR_SET_SEQ (0, 0, mips_receive_seq); | |
1142 | ||
1143 | cksum = mips_cksum (ack, (unsigned char *) NULL, 0); | |
1144 | ||
1145 | ack[HDR_LENGTH + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum); | |
1146 | ack[HDR_LENGTH + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum); | |
1147 | ack[HDR_LENGTH + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum); | |
1148 | ||
1149 | if (remote_debug > 0) | |
1150 | { | |
1151 | ack[HDR_LENGTH + TRLR_LENGTH] = '\0'; | |
1152 | /* Don't use _filtered; we can't deal with a QUIT out of | |
c5aa993b | 1153 | target_wait, and I think this might be called from there. */ |
c906108c | 1154 | printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq, |
c5aa993b | 1155 | ack + 1); |
c906108c SS |
1156 | } |
1157 | ||
2cd58942 | 1158 | if (serial_write (mips_desc, ack, HDR_LENGTH + TRLR_LENGTH) != 0) |
c906108c SS |
1159 | { |
1160 | if (throw_error) | |
1161 | mips_error ("write to target failed: %s", safe_strerror (errno)); | |
1162 | else | |
1163 | return -1; | |
1164 | } | |
1165 | ||
1166 | return len; | |
1167 | } | |
1168 | \f | |
1169 | /* Optionally send a request to the remote system and optionally wait | |
1170 | for the reply. This implements the remote debugging protocol, | |
1171 | which is built on top of the packet protocol defined above. Each | |
1172 | request has an ADDR argument and a DATA argument. The following | |
1173 | requests are defined: | |
1174 | ||
c5aa993b JM |
1175 | \0 don't send a request; just wait for a reply |
1176 | i read word from instruction space at ADDR | |
1177 | d read word from data space at ADDR | |
1178 | I write DATA to instruction space at ADDR | |
1179 | D write DATA to data space at ADDR | |
1180 | r read register number ADDR | |
1181 | R set register number ADDR to value DATA | |
1182 | c continue execution (if ADDR != 1, set pc to ADDR) | |
1183 | s single step (if ADDR != 1, set pc to ADDR) | |
c906108c SS |
1184 | |
1185 | The read requests return the value requested. The write requests | |
1186 | return the previous value in the changed location. The execution | |
1187 | requests return a UNIX wait value (the approximate signal which | |
1188 | caused execution to stop is in the upper eight bits). | |
1189 | ||
1190 | If PERR is not NULL, this function waits for a reply. If an error | |
1191 | occurs, it sets *PERR to 1 and sets errno according to what the | |
1192 | target board reports. */ | |
1193 | ||
4014092b AC |
1194 | static ULONGEST |
1195 | mips_request (int cmd, | |
1196 | ULONGEST addr, | |
1197 | ULONGEST data, | |
1198 | int *perr, | |
1199 | int timeout, | |
1200 | char *buff) | |
c906108c SS |
1201 | { |
1202 | char myBuff[DATA_MAXLEN + 1]; | |
1203 | int len; | |
1204 | int rpid; | |
1205 | char rcmd; | |
1206 | int rerrflg; | |
1207 | unsigned long rresponse; | |
1208 | ||
1209 | if (buff == (char *) NULL) | |
1210 | buff = myBuff; | |
1211 | ||
1212 | if (cmd != '\0') | |
1213 | { | |
1214 | if (mips_need_reply) | |
8e65ff28 AC |
1215 | internal_error (__FILE__, __LINE__, |
1216 | "mips_request: Trying to send command before reply"); | |
c906108c SS |
1217 | sprintf (buff, "0x0 %c 0x%s 0x%s", cmd, paddr_nz (addr), paddr_nz (data)); |
1218 | mips_send_packet (buff, 1); | |
1219 | mips_need_reply = 1; | |
1220 | } | |
1221 | ||
1222 | if (perr == (int *) NULL) | |
1223 | return 0; | |
1224 | ||
c5aa993b | 1225 | if (!mips_need_reply) |
8e65ff28 AC |
1226 | internal_error (__FILE__, __LINE__, |
1227 | "mips_request: Trying to get reply before command"); | |
c906108c SS |
1228 | |
1229 | mips_need_reply = 0; | |
1230 | ||
1231 | len = mips_receive_packet (buff, 1, timeout); | |
1232 | buff[len] = '\0'; | |
1233 | ||
1234 | if (sscanf (buff, "0x%x %c 0x%x 0x%lx", | |
1235 | &rpid, &rcmd, &rerrflg, &rresponse) != 4 | |
1236 | || (cmd != '\0' && rcmd != cmd)) | |
1237 | mips_error ("Bad response from remote board"); | |
1238 | ||
1239 | if (rerrflg != 0) | |
1240 | { | |
1241 | *perr = 1; | |
1242 | ||
1243 | /* FIXME: This will returns MIPS errno numbers, which may or may | |
c5aa993b JM |
1244 | not be the same as errno values used on other systems. If |
1245 | they stick to common errno values, they will be the same, but | |
1246 | if they don't, they must be translated. */ | |
c906108c SS |
1247 | errno = rresponse; |
1248 | ||
1249 | return 0; | |
1250 | } | |
1251 | ||
1252 | *perr = 0; | |
1253 | return rresponse; | |
1254 | } | |
1255 | ||
1256 | static void | |
4efb68b1 | 1257 | mips_initialize_cleanups (void *arg) |
c906108c SS |
1258 | { |
1259 | mips_initializing = 0; | |
1260 | } | |
1261 | ||
1262 | static void | |
4efb68b1 | 1263 | mips_exit_cleanups (void *arg) |
c906108c SS |
1264 | { |
1265 | mips_exiting = 0; | |
1266 | } | |
1267 | ||
1268 | static void | |
fba45db2 | 1269 | mips_send_command (const char *cmd, int prompt) |
c906108c | 1270 | { |
2cd58942 | 1271 | serial_write (mips_desc, cmd, strlen (cmd)); |
c906108c SS |
1272 | mips_expect (cmd); |
1273 | mips_expect ("\n"); | |
1274 | if (prompt) | |
1275 | mips_expect (mips_monitor_prompt); | |
1276 | } | |
1277 | ||
1278 | /* Enter remote (dbx) debug mode: */ | |
1279 | static void | |
fba45db2 | 1280 | mips_enter_debug (void) |
c906108c SS |
1281 | { |
1282 | /* Reset the sequence numbers, ready for the new debug sequence: */ | |
1283 | mips_send_seq = 0; | |
1284 | mips_receive_seq = 0; | |
1285 | ||
1286 | if (mips_monitor != MON_IDT) | |
1287 | mips_send_command ("debug\r", 0); | |
c5aa993b | 1288 | else /* assume IDT monitor by default */ |
c906108c SS |
1289 | mips_send_command ("db tty0\r", 0); |
1290 | ||
c5aa993b | 1291 | sleep (1); |
2cd58942 | 1292 | serial_write (mips_desc, "\r", sizeof "\r" - 1); |
c906108c SS |
1293 | |
1294 | /* We don't need to absorb any spurious characters here, since the | |
1295 | mips_receive_header will eat up a reasonable number of characters | |
1296 | whilst looking for the SYN, however this avoids the "garbage" | |
1297 | being displayed to the user. */ | |
1298 | if (mips_monitor != MON_IDT) | |
1299 | mips_expect ("\r"); | |
c5aa993b | 1300 | |
c906108c SS |
1301 | { |
1302 | char buff[DATA_MAXLEN + 1]; | |
1303 | if (mips_receive_packet (buff, 1, 3) < 0) | |
1304 | mips_error ("Failed to initialize (didn't receive packet)."); | |
1305 | } | |
1306 | } | |
1307 | ||
1308 | /* Exit remote (dbx) debug mode, returning to the monitor prompt: */ | |
1309 | static int | |
fba45db2 | 1310 | mips_exit_debug (void) |
c906108c SS |
1311 | { |
1312 | int err; | |
1313 | struct cleanup *old_cleanups = make_cleanup (mips_exit_cleanups, NULL); | |
1314 | ||
1315 | mips_exiting = 1; | |
1316 | ||
1317 | if (mips_monitor != MON_IDT) | |
1318 | { | |
1319 | /* The DDB (NEC) and MiniRISC (LSI) versions of PMON exit immediately, | |
1320 | so we do not get a reply to this command: */ | |
4014092b | 1321 | mips_request ('x', 0, 0, NULL, mips_receive_wait, NULL); |
c906108c SS |
1322 | mips_need_reply = 0; |
1323 | if (!mips_expect (" break!")) | |
c5aa993b | 1324 | return -1; |
c906108c SS |
1325 | } |
1326 | else | |
4014092b | 1327 | mips_request ('x', 0, 0, &err, mips_receive_wait, NULL); |
c906108c SS |
1328 | |
1329 | if (!mips_expect (mips_monitor_prompt)) | |
1330 | return -1; | |
1331 | ||
1332 | do_cleanups (old_cleanups); | |
1333 | ||
1334 | return 0; | |
1335 | } | |
1336 | ||
1337 | /* Initialize a new connection to the MIPS board, and make sure we are | |
1338 | really connected. */ | |
1339 | ||
1340 | static void | |
fba45db2 | 1341 | mips_initialize (void) |
c906108c SS |
1342 | { |
1343 | int err; | |
1344 | struct cleanup *old_cleanups = make_cleanup (mips_initialize_cleanups, NULL); | |
1345 | int j; | |
1346 | ||
1347 | /* What is this code doing here? I don't see any way it can happen, and | |
1348 | it might mean mips_initializing didn't get cleared properly. | |
1349 | So I'll make it a warning. */ | |
1350 | ||
1351 | if (mips_initializing) | |
1352 | { | |
1353 | warning ("internal error: mips_initialize called twice"); | |
1354 | return; | |
1355 | } | |
1356 | ||
1357 | mips_wait_flag = 0; | |
1358 | mips_initializing = 1; | |
1359 | ||
1360 | /* At this point, the packit protocol isn't responding. We'll try getting | |
1361 | into the monitor, and restarting the protocol. */ | |
1362 | ||
1363 | /* Force the system into the monitor. After this we *should* be at | |
1364 | the mips_monitor_prompt. */ | |
1365 | if (mips_monitor != MON_IDT) | |
c5aa993b | 1366 | j = 0; /* start by checking if we are already at the prompt */ |
c906108c | 1367 | else |
c5aa993b | 1368 | j = 1; /* start by sending a break */ |
c906108c SS |
1369 | for (; j <= 4; j++) |
1370 | { | |
1371 | switch (j) | |
1372 | { | |
c5aa993b | 1373 | case 0: /* First, try sending a CR */ |
2cd58942 AC |
1374 | serial_flush_input (mips_desc); |
1375 | serial_write (mips_desc, "\r", 1); | |
c5aa993b JM |
1376 | break; |
1377 | case 1: /* First, try sending a break */ | |
2cd58942 | 1378 | serial_send_break (mips_desc); |
c906108c | 1379 | break; |
c5aa993b | 1380 | case 2: /* Then, try a ^C */ |
2cd58942 | 1381 | serial_write (mips_desc, "\003", 1); |
c906108c | 1382 | break; |
c5aa993b | 1383 | case 3: /* Then, try escaping from download */ |
c906108c | 1384 | { |
c5aa993b JM |
1385 | if (mips_monitor != MON_IDT) |
1386 | { | |
1387 | char tbuff[7]; | |
1388 | ||
1389 | /* We shouldn't need to send multiple termination | |
1390 | sequences, since the target performs line (or | |
1391 | block) reads, and then processes those | |
1392 | packets. In-case we were downloading a large packet | |
1393 | we flush the output buffer before inserting a | |
1394 | termination sequence. */ | |
2cd58942 | 1395 | serial_flush_output (mips_desc); |
c5aa993b | 1396 | sprintf (tbuff, "\r/E/E\r"); |
2cd58942 | 1397 | serial_write (mips_desc, tbuff, 6); |
c5aa993b JM |
1398 | } |
1399 | else | |
1400 | { | |
1401 | char srec[10]; | |
1402 | int i; | |
1403 | ||
1404 | /* We are possibly in binary download mode, having | |
1405 | aborted in the middle of an S-record. ^C won't | |
1406 | work because of binary mode. The only reliable way | |
1407 | out is to send enough termination packets (8 bytes) | |
1408 | to fill up and then overflow the largest size | |
1409 | S-record (255 bytes in this case). This amounts to | |
1410 | 256/8 + 1 packets. | |
1411 | */ | |
1412 | ||
1413 | mips_make_srec (srec, '7', 0, NULL, 0); | |
1414 | ||
1415 | for (i = 1; i <= 33; i++) | |
1416 | { | |
2cd58942 | 1417 | serial_write (mips_desc, srec, 8); |
c5aa993b | 1418 | |
2cd58942 | 1419 | if (serial_readchar (mips_desc, 0) >= 0) |
c5aa993b | 1420 | break; /* Break immediatly if we get something from |
c906108c | 1421 | the board. */ |
c5aa993b JM |
1422 | } |
1423 | } | |
1424 | } | |
c906108c SS |
1425 | break; |
1426 | case 4: | |
1427 | mips_error ("Failed to initialize."); | |
1428 | } | |
1429 | ||
1430 | if (mips_expect (mips_monitor_prompt)) | |
1431 | break; | |
1432 | } | |
1433 | ||
1434 | if (mips_monitor != MON_IDT) | |
1435 | { | |
1436 | /* Sometimes PMON ignores the first few characters in the first | |
1437 | command sent after a load. Sending a blank command gets | |
c5aa993b | 1438 | around that. */ |
c906108c SS |
1439 | mips_send_command ("\r", -1); |
1440 | ||
1441 | /* Ensure the correct target state: */ | |
1442 | if (mips_monitor != MON_LSI) | |
1443 | mips_send_command ("set regsize 64\r", -1); | |
1444 | mips_send_command ("set hostport tty0\r", -1); | |
1445 | mips_send_command ("set brkcmd \"\"\r", -1); | |
1446 | /* Delete all the current breakpoints: */ | |
1447 | mips_send_command ("db *\r", -1); | |
1448 | /* NOTE: PMON does not have breakpoint support through the | |
1449 | "debug" mode, only at the monitor command-line. */ | |
1450 | } | |
1451 | ||
1452 | mips_enter_debug (); | |
1453 | ||
1454 | /* Clear all breakpoints: */ | |
1455 | if ((mips_monitor == MON_IDT | |
1456 | && clear_breakpoint (-1, 0, BREAK_UNUSED) == 0) | |
1457 | || mips_monitor == MON_LSI) | |
1458 | monitor_supports_breakpoints = 1; | |
1459 | else | |
1460 | monitor_supports_breakpoints = 0; | |
1461 | ||
1462 | do_cleanups (old_cleanups); | |
1463 | ||
1464 | /* If this doesn't call error, we have connected; we don't care if | |
1465 | the request itself succeeds or fails. */ | |
1466 | ||
4014092b | 1467 | mips_request ('r', 0, 0, &err, mips_receive_wait, NULL); |
c906108c SS |
1468 | } |
1469 | ||
1470 | /* Open a connection to the remote board. */ | |
1471 | static void | |
fba45db2 | 1472 | common_open (struct target_ops *ops, char *name, int from_tty, |
98691afe AC |
1473 | enum mips_monitor_type new_monitor, |
1474 | const char *new_monitor_prompt) | |
c906108c SS |
1475 | { |
1476 | char *ptype; | |
1477 | char *serial_port_name; | |
1478 | char *remote_name = 0; | |
1479 | char *local_name = 0; | |
1480 | char **argv; | |
1481 | ||
1482 | if (name == 0) | |
1483 | error ( | |
c5aa993b | 1484 | "To open a MIPS remote debugging connection, you need to specify what serial\n\ |
c906108c | 1485 | device is attached to the target board (e.g., /dev/ttya).\n" |
c5aa993b JM |
1486 | "If you want to use TFTP to download to the board, specify the name of a\n" |
1487 | "temporary file to be used by GDB for downloads as the second argument.\n" | |
1488 | "This filename must be in the form host:filename, where host is the name\n" | |
1489 | "of the host running the TFTP server, and the file must be readable by the\n" | |
1490 | "world. If the local name of the temporary file differs from the name as\n" | |
1491 | "seen from the board via TFTP, specify that name as the third parameter.\n"); | |
c906108c SS |
1492 | |
1493 | /* Parse the serial port name, the optional TFTP name, and the | |
1494 | optional local TFTP name. */ | |
1495 | if ((argv = buildargv (name)) == NULL) | |
c5aa993b | 1496 | nomem (0); |
7a292a7a | 1497 | make_cleanup_freeargv (argv); |
c906108c | 1498 | |
4fcf66da | 1499 | serial_port_name = xstrdup (argv[0]); |
c5aa993b | 1500 | if (argv[1]) /* remote TFTP name specified? */ |
c906108c SS |
1501 | { |
1502 | remote_name = argv[1]; | |
c5aa993b | 1503 | if (argv[2]) /* local TFTP filename specified? */ |
c906108c SS |
1504 | local_name = argv[2]; |
1505 | } | |
1506 | ||
1507 | target_preopen (from_tty); | |
1508 | ||
1509 | if (mips_is_open) | |
1510 | unpush_target (current_ops); | |
1511 | ||
1512 | /* Open and initialize the serial port. */ | |
2cd58942 | 1513 | mips_desc = serial_open (serial_port_name); |
819cc324 | 1514 | if (mips_desc == NULL) |
c906108c SS |
1515 | perror_with_name (serial_port_name); |
1516 | ||
1517 | if (baud_rate != -1) | |
1518 | { | |
2cd58942 | 1519 | if (serial_setbaudrate (mips_desc, baud_rate)) |
c5aa993b | 1520 | { |
2cd58942 | 1521 | serial_close (mips_desc); |
c5aa993b JM |
1522 | perror_with_name (serial_port_name); |
1523 | } | |
c906108c SS |
1524 | } |
1525 | ||
2cd58942 | 1526 | serial_raw (mips_desc); |
c906108c SS |
1527 | |
1528 | /* Open and initialize the optional download port. If it is in the form | |
1529 | hostname#portnumber, it's a UDP socket. If it is in the form | |
1530 | hostname:filename, assume it's the TFTP filename that must be | |
1531 | passed to the DDB board to tell it where to get the load file. */ | |
1532 | if (remote_name) | |
1533 | { | |
1534 | if (strchr (remote_name, '#')) | |
1535 | { | |
2cd58942 | 1536 | udp_desc = serial_open (remote_name); |
c906108c SS |
1537 | if (!udp_desc) |
1538 | perror_with_name ("Unable to open UDP port"); | |
1539 | udp_in_use = 1; | |
1540 | } | |
1541 | else | |
1542 | { | |
1543 | /* Save the remote and local names of the TFTP temp file. If | |
1544 | the user didn't specify a local name, assume it's the same | |
1545 | as the part of the remote name after the "host:". */ | |
1546 | if (tftp_name) | |
b8c9b27d | 1547 | xfree (tftp_name); |
c906108c | 1548 | if (tftp_localname) |
b8c9b27d | 1549 | xfree (tftp_localname); |
c906108c | 1550 | if (local_name == NULL) |
c5aa993b JM |
1551 | if ((local_name = strchr (remote_name, ':')) != NULL) |
1552 | local_name++; /* skip over the colon */ | |
c906108c SS |
1553 | if (local_name == NULL) |
1554 | local_name = remote_name; /* local name same as remote name */ | |
4fcf66da AC |
1555 | tftp_name = xstrdup (remote_name); |
1556 | tftp_localname = xstrdup (local_name); | |
c906108c SS |
1557 | tftp_in_use = 1; |
1558 | } | |
1559 | } | |
1560 | ||
1561 | current_ops = ops; | |
1562 | mips_is_open = 1; | |
1563 | ||
1564 | /* Reset the expected monitor prompt if it's never been set before. */ | |
1565 | if (mips_monitor_prompt == NULL) | |
4fcf66da | 1566 | mips_monitor_prompt = xstrdup (new_monitor_prompt); |
c906108c SS |
1567 | mips_monitor = new_monitor; |
1568 | ||
1569 | mips_initialize (); | |
1570 | ||
1571 | if (from_tty) | |
1572 | printf_unfiltered ("Remote MIPS debugging using %s\n", serial_port_name); | |
1573 | ||
1574 | /* Switch to using remote target now. */ | |
1575 | push_target (ops); | |
1576 | ||
1577 | /* FIXME: Should we call start_remote here? */ | |
1578 | ||
1579 | /* Try to figure out the processor model if possible. */ | |
691c0433 | 1580 | deprecated_mips_set_processor_regs_hack (); |
c906108c | 1581 | |
a193e397 AC |
1582 | /* This is really the job of start_remote however, that makes an |
1583 | assumption that the target is about to print out a status message | |
1584 | of some sort. That doesn't happen here (in fact, it may not be | |
1585 | possible to get the monitor to send the appropriate packet). */ | |
c906108c SS |
1586 | |
1587 | flush_cached_frames (); | |
1588 | registers_changed (); | |
1589 | stop_pc = read_pc (); | |
b04f3ab4 | 1590 | print_stack_frame (get_selected_frame (NULL), 0, SRC_AND_LOC); |
b8c9b27d | 1591 | xfree (serial_port_name); |
c906108c SS |
1592 | } |
1593 | ||
1594 | static void | |
fba45db2 | 1595 | mips_open (char *name, int from_tty) |
c906108c | 1596 | { |
ef31c1ea AC |
1597 | const char *monitor_prompt = NULL; |
1598 | if (TARGET_ARCHITECTURE != NULL | |
1599 | && TARGET_ARCHITECTURE->arch == bfd_arch_mips) | |
1600 | { | |
1601 | switch (TARGET_ARCHITECTURE->mach) | |
1602 | { | |
1603 | case bfd_mach_mips4100: | |
1604 | case bfd_mach_mips4300: | |
1605 | case bfd_mach_mips4600: | |
1606 | case bfd_mach_mips4650: | |
1607 | case bfd_mach_mips5000: | |
1608 | monitor_prompt = "<RISQ> "; | |
1609 | break; | |
1610 | } | |
1611 | } | |
1612 | if (monitor_prompt == NULL) | |
1613 | monitor_prompt = "<IDT>"; | |
1614 | common_open (&mips_ops, name, from_tty, MON_IDT, monitor_prompt); | |
c906108c SS |
1615 | } |
1616 | ||
1617 | static void | |
fba45db2 | 1618 | pmon_open (char *name, int from_tty) |
c906108c SS |
1619 | { |
1620 | common_open (&pmon_ops, name, from_tty, MON_PMON, "PMON> "); | |
1621 | } | |
1622 | ||
1623 | static void | |
fba45db2 | 1624 | ddb_open (char *name, int from_tty) |
c906108c SS |
1625 | { |
1626 | common_open (&ddb_ops, name, from_tty, MON_DDB, "NEC010>"); | |
1627 | } | |
1628 | ||
1629 | static void | |
fba45db2 | 1630 | lsi_open (char *name, int from_tty) |
c906108c SS |
1631 | { |
1632 | int i; | |
1633 | ||
1634 | /* Clear the LSI breakpoint table. */ | |
1635 | for (i = 0; i < MAX_LSI_BREAKPOINTS; i++) | |
1636 | lsi_breakpoints[i].type = BREAK_UNUSED; | |
c5aa993b | 1637 | |
c906108c SS |
1638 | common_open (&lsi_ops, name, from_tty, MON_LSI, "PMON> "); |
1639 | } | |
1640 | ||
1641 | /* Close a connection to the remote board. */ | |
1642 | ||
1643 | static void | |
fba45db2 | 1644 | mips_close (int quitting) |
c906108c SS |
1645 | { |
1646 | if (mips_is_open) | |
1647 | { | |
1648 | /* Get the board out of remote debugging mode. */ | |
1649 | (void) mips_exit_debug (); | |
1650 | ||
1651 | close_ports (); | |
1652 | } | |
1653 | } | |
1654 | ||
1655 | /* Detach from the remote board. */ | |
1656 | ||
1657 | static void | |
fba45db2 | 1658 | mips_detach (char *args, int from_tty) |
c906108c SS |
1659 | { |
1660 | if (args) | |
1661 | error ("Argument given to \"detach\" when remotely debugging."); | |
1662 | ||
1663 | pop_target (); | |
1664 | ||
1665 | mips_close (1); | |
1666 | ||
1667 | if (from_tty) | |
1668 | printf_unfiltered ("Ending remote MIPS debugging.\n"); | |
1669 | } | |
1670 | ||
1671 | /* Tell the target board to resume. This does not wait for a reply | |
1672 | from the board, except in the case of single-stepping on LSI boards, | |
1673 | where PMON does return a reply. */ | |
1674 | ||
1675 | static void | |
39f77062 | 1676 | mips_resume (ptid_t ptid, int step, enum target_signal siggnal) |
c906108c SS |
1677 | { |
1678 | int err; | |
1679 | ||
1680 | /* LSI PMON requires returns a reply packet "0x1 s 0x0 0x57f" after | |
1681 | a single step, so we wait for that. */ | |
4014092b | 1682 | mips_request (step ? 's' : 'c', 1, siggnal, |
c906108c SS |
1683 | mips_monitor == MON_LSI && step ? &err : (int *) NULL, |
1684 | mips_receive_wait, NULL); | |
1685 | } | |
1686 | ||
1687 | /* Return the signal corresponding to SIG, where SIG is the number which | |
1688 | the MIPS protocol uses for the signal. */ | |
a78f21af | 1689 | static enum target_signal |
fba45db2 | 1690 | mips_signal_from_protocol (int sig) |
c906108c SS |
1691 | { |
1692 | /* We allow a few more signals than the IDT board actually returns, on | |
1693 | the theory that there is at least *some* hope that perhaps the numbering | |
1694 | for these signals is widely agreed upon. */ | |
1695 | if (sig <= 0 | |
1696 | || sig > 31) | |
1697 | return TARGET_SIGNAL_UNKNOWN; | |
1698 | ||
1699 | /* Don't want to use target_signal_from_host because we are converting | |
1700 | from MIPS signal numbers, not host ones. Our internal numbers | |
1701 | match the MIPS numbers for the signals the board can return, which | |
1702 | are: SIGINT, SIGSEGV, SIGBUS, SIGILL, SIGFPE, SIGTRAP. */ | |
1703 | return (enum target_signal) sig; | |
1704 | } | |
1705 | ||
1706 | /* Wait until the remote stops, and return a wait status. */ | |
1707 | ||
39f77062 KB |
1708 | static ptid_t |
1709 | mips_wait (ptid_t ptid, struct target_waitstatus *status) | |
c906108c SS |
1710 | { |
1711 | int rstatus; | |
1712 | int err; | |
1713 | char buff[DATA_MAXLEN]; | |
1714 | int rpc, rfp, rsp; | |
1715 | char flags[20]; | |
1716 | int nfields; | |
1717 | int i; | |
1718 | ||
1719 | interrupt_count = 0; | |
1720 | hit_watchpoint = 0; | |
1721 | ||
1722 | /* If we have not sent a single step or continue command, then the | |
1723 | board is waiting for us to do something. Return a status | |
1724 | indicating that it is stopped. */ | |
c5aa993b | 1725 | if (!mips_need_reply) |
c906108c SS |
1726 | { |
1727 | status->kind = TARGET_WAITKIND_STOPPED; | |
1728 | status->value.sig = TARGET_SIGNAL_TRAP; | |
39f77062 | 1729 | return inferior_ptid; |
c906108c SS |
1730 | } |
1731 | ||
1732 | /* No timeout; we sit here as long as the program continues to execute. */ | |
1733 | mips_wait_flag = 1; | |
4014092b | 1734 | rstatus = mips_request ('\000', 0, 0, &err, -1, buff); |
c906108c SS |
1735 | mips_wait_flag = 0; |
1736 | if (err) | |
1737 | mips_error ("Remote failure: %s", safe_strerror (errno)); | |
1738 | ||
1739 | /* On returning from a continue, the PMON monitor seems to start | |
1740 | echoing back the messages we send prior to sending back the | |
1741 | ACK. The code can cope with this, but to try and avoid the | |
1742 | unnecessary serial traffic, and "spurious" characters displayed | |
1743 | to the user, we cheat and reset the debug protocol. The problems | |
1744 | seems to be caused by a check on the number of arguments, and the | |
1745 | command length, within the monitor causing it to echo the command | |
1746 | as a bad packet. */ | |
1747 | if (mips_monitor == MON_PMON) | |
1748 | { | |
1749 | mips_exit_debug (); | |
1750 | mips_enter_debug (); | |
1751 | } | |
1752 | ||
1753 | /* See if we got back extended status. If so, pick out the pc, fp, sp, etc... */ | |
1754 | ||
1755 | nfields = sscanf (buff, "0x%*x %*c 0x%*x 0x%*x 0x%x 0x%x 0x%x 0x%*x %s", | |
1756 | &rpc, &rfp, &rsp, flags); | |
1757 | if (nfields >= 3) | |
1758 | { | |
123a958e | 1759 | char buf[MAX_REGISTER_SIZE]; |
c906108c | 1760 | |
3acba339 | 1761 | store_unsigned_integer (buf, register_size (current_gdbarch, PC_REGNUM), rpc); |
23a6d369 | 1762 | regcache_raw_supply (current_regcache, PC_REGNUM, buf); |
c906108c | 1763 | |
3acba339 | 1764 | store_unsigned_integer (buf, register_size (current_gdbarch, PC_REGNUM), rfp); |
23a6d369 | 1765 | regcache_raw_supply (current_regcache, 30, buf); /* This register they are avoiding and so it is unnamed */ |
c906108c | 1766 | |
3acba339 | 1767 | store_unsigned_integer (buf, register_size (current_gdbarch, SP_REGNUM), rsp); |
23a6d369 | 1768 | regcache_raw_supply (current_regcache, SP_REGNUM, buf); |
c906108c | 1769 | |
3acba339 | 1770 | store_unsigned_integer (buf, register_size (current_gdbarch, DEPRECATED_FP_REGNUM), 0); |
23a6d369 | 1771 | regcache_raw_supply (current_regcache, DEPRECATED_FP_REGNUM, buf); |
c906108c SS |
1772 | |
1773 | if (nfields == 9) | |
1774 | { | |
1775 | int i; | |
1776 | ||
1777 | for (i = 0; i <= 2; i++) | |
1778 | if (flags[i] == 'r' || flags[i] == 'w') | |
1779 | hit_watchpoint = 1; | |
1780 | else if (flags[i] == '\000') | |
1781 | break; | |
1782 | } | |
1783 | } | |
1784 | ||
1785 | if (strcmp (target_shortname, "lsi") == 0) | |
1786 | { | |
1787 | #if 0 | |
1788 | /* If this is an LSI PMON target, see if we just hit a hardrdware watchpoint. | |
c5aa993b JM |
1789 | Right now, PMON doesn't give us enough information to determine which |
1790 | breakpoint we hit. So we have to look up the PC in our own table | |
1791 | of breakpoints, and if found, assume it's just a normal instruction | |
1792 | fetch breakpoint, not a data watchpoint. FIXME when PMON | |
1793 | provides some way to tell us what type of breakpoint it is. */ | |
c906108c | 1794 | int i; |
c5aa993b | 1795 | CORE_ADDR pc = read_pc (); |
c906108c SS |
1796 | |
1797 | hit_watchpoint = 1; | |
1798 | for (i = 0; i < MAX_LSI_BREAKPOINTS; i++) | |
1799 | { | |
1800 | if (lsi_breakpoints[i].addr == pc | |
1801 | && lsi_breakpoints[i].type == BREAK_FETCH) | |
1802 | { | |
1803 | hit_watchpoint = 0; | |
1804 | break; | |
1805 | } | |
1806 | } | |
1807 | #else | |
1808 | /* If a data breakpoint was hit, PMON returns the following packet: | |
c5aa993b JM |
1809 | 0x1 c 0x0 0x57f 0x1 |
1810 | The return packet from an ordinary breakpoint doesn't have the | |
1811 | extra 0x01 field tacked onto the end. */ | |
c906108c SS |
1812 | if (nfields == 1 && rpc == 1) |
1813 | hit_watchpoint = 1; | |
1814 | #endif | |
1815 | } | |
1816 | ||
1817 | /* NOTE: The following (sig) numbers are defined by PMON: | |
c5aa993b JM |
1818 | SPP_SIGTRAP 5 breakpoint |
1819 | SPP_SIGINT 2 | |
1820 | SPP_SIGSEGV 11 | |
1821 | SPP_SIGBUS 10 | |
1822 | SPP_SIGILL 4 | |
1823 | SPP_SIGFPE 8 | |
1824 | SPP_SIGTERM 15 */ | |
c906108c SS |
1825 | |
1826 | /* Translate a MIPS waitstatus. We use constants here rather than WTERMSIG | |
1827 | and so on, because the constants we want here are determined by the | |
1828 | MIPS protocol and have nothing to do with what host we are running on. */ | |
1829 | if ((rstatus & 0xff) == 0) | |
1830 | { | |
1831 | status->kind = TARGET_WAITKIND_EXITED; | |
1832 | status->value.integer = (((rstatus) >> 8) & 0xff); | |
1833 | } | |
1834 | else if ((rstatus & 0xff) == 0x7f) | |
1835 | { | |
1836 | status->kind = TARGET_WAITKIND_STOPPED; | |
1837 | status->value.sig = mips_signal_from_protocol (((rstatus) >> 8) & 0xff); | |
1838 | ||
1839 | /* If the stop PC is in the _exit function, assume | |
1840 | we hit the 'break 0x3ff' instruction in _exit, so this | |
c5aa993b | 1841 | is not a normal breakpoint. */ |
c906108c SS |
1842 | if (strcmp (target_shortname, "lsi") == 0) |
1843 | { | |
1844 | char *func_name; | |
1845 | CORE_ADDR func_start; | |
c5aa993b | 1846 | CORE_ADDR pc = read_pc (); |
c906108c SS |
1847 | |
1848 | find_pc_partial_function (pc, &func_name, &func_start, NULL); | |
1849 | if (func_name != NULL && strcmp (func_name, "_exit") == 0 | |
1850 | && func_start == pc) | |
1851 | status->kind = TARGET_WAITKIND_EXITED; | |
1852 | } | |
1853 | } | |
1854 | else | |
1855 | { | |
1856 | status->kind = TARGET_WAITKIND_SIGNALLED; | |
1857 | status->value.sig = mips_signal_from_protocol (rstatus & 0x7f); | |
1858 | } | |
1859 | ||
39f77062 | 1860 | return inferior_ptid; |
c906108c SS |
1861 | } |
1862 | ||
1863 | /* We have to map between the register numbers used by gdb and the | |
82e34d2f | 1864 | register numbers used by the debugging protocol. */ |
c906108c SS |
1865 | |
1866 | #define REGNO_OFFSET 96 | |
1867 | ||
1868 | static int | |
fba45db2 | 1869 | mips_map_regno (int regno) |
c906108c SS |
1870 | { |
1871 | if (regno < 32) | |
1872 | return regno; | |
56cea623 AC |
1873 | if (regno >= mips_regnum (current_gdbarch)->fp0 |
1874 | && regno < mips_regnum (current_gdbarch)->fp0 + 32) | |
1875 | return regno - mips_regnum (current_gdbarch)->fp0 + 32; | |
1876 | else if (regno == mips_regnum (current_gdbarch)->pc) | |
1877 | return REGNO_OFFSET + 0; | |
1878 | else if (regno == mips_regnum (current_gdbarch)->cause) | |
1879 | return REGNO_OFFSET + 1; | |
1880 | else if (regno == mips_regnum (current_gdbarch)->hi) | |
1881 | return REGNO_OFFSET + 2; | |
1882 | else if (regno == mips_regnum (current_gdbarch)->lo) | |
1883 | return REGNO_OFFSET + 3; | |
1884 | else if (regno == mips_regnum (current_gdbarch)->fp_control_status) | |
1885 | return REGNO_OFFSET + 4; | |
1886 | else if (regno == mips_regnum (current_gdbarch)->fp_implementation_revision) | |
1887 | return REGNO_OFFSET + 5; | |
1888 | else | |
1889 | /* FIXME: Is there a way to get the status register? */ | |
1890 | return 0; | |
c906108c SS |
1891 | } |
1892 | ||
1893 | /* Fetch the remote registers. */ | |
1894 | ||
1895 | static void | |
fba45db2 | 1896 | mips_fetch_registers (int regno) |
c906108c SS |
1897 | { |
1898 | unsigned LONGEST val; | |
1899 | int err; | |
1900 | ||
1901 | if (regno == -1) | |
1902 | { | |
1903 | for (regno = 0; regno < NUM_REGS; regno++) | |
1904 | mips_fetch_registers (regno); | |
1905 | return; | |
1906 | } | |
1907 | ||
613e114f | 1908 | if (regno == DEPRECATED_FP_REGNUM || regno == MIPS_ZERO_REGNUM) |
0ba6dca9 AC |
1909 | /* DEPRECATED_FP_REGNUM on the mips is a hack which is just |
1910 | supposed to read zero (see also mips-nat.c). */ | |
c906108c SS |
1911 | val = 0; |
1912 | else | |
1913 | { | |
1914 | /* If PMON doesn't support this register, don't waste serial | |
1915 | bandwidth trying to read it. */ | |
1916 | int pmon_reg = mips_map_regno (regno); | |
1917 | if (regno != 0 && pmon_reg == 0) | |
1918 | val = 0; | |
1919 | else | |
1920 | { | |
1921 | /* Unfortunately the PMON version in the Vr4300 board has been | |
1922 | compiled without the 64bit register access commands. This | |
1923 | means we cannot get hold of the full register width. */ | |
1924 | if (mips_monitor == MON_DDB) | |
4014092b AC |
1925 | val = (unsigned) mips_request ('t', pmon_reg, 0, |
1926 | &err, mips_receive_wait, NULL); | |
c906108c | 1927 | else |
4014092b AC |
1928 | val = mips_request ('r', pmon_reg, 0, |
1929 | &err, mips_receive_wait, NULL); | |
c906108c SS |
1930 | if (err) |
1931 | mips_error ("Can't read register %d: %s", regno, | |
1932 | safe_strerror (errno)); | |
1933 | } | |
1934 | } | |
1935 | ||
1936 | { | |
123a958e | 1937 | char buf[MAX_REGISTER_SIZE]; |
c906108c SS |
1938 | |
1939 | /* We got the number the register holds, but gdb expects to see a | |
1940 | value in the target byte ordering. */ | |
3acba339 | 1941 | store_unsigned_integer (buf, register_size (current_gdbarch, regno), val); |
23a6d369 | 1942 | regcache_raw_supply (current_regcache, regno, buf); |
c906108c SS |
1943 | } |
1944 | } | |
1945 | ||
1946 | /* Prepare to store registers. The MIPS protocol can store individual | |
1947 | registers, so this function doesn't have to do anything. */ | |
1948 | ||
1949 | static void | |
fba45db2 | 1950 | mips_prepare_to_store (void) |
c906108c SS |
1951 | { |
1952 | } | |
1953 | ||
1954 | /* Store remote register(s). */ | |
1955 | ||
1956 | static void | |
fba45db2 | 1957 | mips_store_registers (int regno) |
c906108c SS |
1958 | { |
1959 | int err; | |
1960 | ||
1961 | if (regno == -1) | |
1962 | { | |
1963 | for (regno = 0; regno < NUM_REGS; regno++) | |
1964 | mips_store_registers (regno); | |
1965 | return; | |
1966 | } | |
1967 | ||
4014092b | 1968 | mips_request ('R', mips_map_regno (regno), |
c906108c SS |
1969 | read_register (regno), |
1970 | &err, mips_receive_wait, NULL); | |
1971 | if (err) | |
1972 | mips_error ("Can't write register %d: %s", regno, safe_strerror (errno)); | |
1973 | } | |
1974 | ||
1975 | /* Fetch a word from the target board. */ | |
1976 | ||
c5aa993b | 1977 | static unsigned int |
fba45db2 | 1978 | mips_fetch_word (CORE_ADDR addr) |
c906108c SS |
1979 | { |
1980 | unsigned int val; | |
1981 | int err; | |
1982 | ||
4014092b | 1983 | val = mips_request ('d', addr, 0, &err, mips_receive_wait, NULL); |
c906108c SS |
1984 | if (err) |
1985 | { | |
1986 | /* Data space failed; try instruction space. */ | |
4014092b | 1987 | val = mips_request ('i', addr, 0, &err, |
c906108c SS |
1988 | mips_receive_wait, NULL); |
1989 | if (err) | |
c5aa993b JM |
1990 | mips_error ("Can't read address 0x%s: %s", |
1991 | paddr_nz (addr), safe_strerror (errno)); | |
c906108c SS |
1992 | } |
1993 | return val; | |
1994 | } | |
1995 | ||
1996 | /* Store a word to the target board. Returns errno code or zero for | |
1997 | success. If OLD_CONTENTS is non-NULL, put the old contents of that | |
1998 | memory location there. */ | |
1999 | ||
2000 | /* FIXME! make sure only 32-bit quantities get stored! */ | |
2001 | static int | |
fba45db2 | 2002 | mips_store_word (CORE_ADDR addr, unsigned int val, char *old_contents) |
c906108c SS |
2003 | { |
2004 | int err; | |
2005 | unsigned int oldcontents; | |
2006 | ||
4014092b | 2007 | oldcontents = mips_request ('D', addr, val, &err, |
c906108c SS |
2008 | mips_receive_wait, NULL); |
2009 | if (err) | |
2010 | { | |
2011 | /* Data space failed; try instruction space. */ | |
4014092b | 2012 | oldcontents = mips_request ('I', addr, val, &err, |
c906108c SS |
2013 | mips_receive_wait, NULL); |
2014 | if (err) | |
2015 | return errno; | |
2016 | } | |
2017 | if (old_contents != NULL) | |
2018 | store_unsigned_integer (old_contents, 4, oldcontents); | |
2019 | return 0; | |
2020 | } | |
2021 | ||
2022 | /* Read or write LEN bytes from inferior memory at MEMADDR, | |
2023 | transferring to or from debugger address MYADDR. Write to inferior | |
2024 | if SHOULD_WRITE is nonzero. Returns length of data written or | |
2025 | read; 0 for error. Note that protocol gives us the correct value | |
2026 | for a longword, since it transfers values in ASCII. We want the | |
2027 | byte values, so we have to swap the longword values. */ | |
2028 | ||
4014092b AC |
2029 | static int mask_address_p = 1; |
2030 | ||
c906108c | 2031 | static int |
fba45db2 | 2032 | mips_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, int write, |
0a65a603 | 2033 | struct mem_attrib *attrib, struct target_ops *target) |
c906108c | 2034 | { |
4014092b AC |
2035 | int i; |
2036 | CORE_ADDR addr; | |
2037 | int count; | |
2038 | char *buffer; | |
2039 | int status; | |
2040 | ||
2041 | /* PMON targets do not cope well with 64 bit addresses. Mask the | |
2042 | value down to 32 bits. */ | |
2043 | if (mask_address_p) | |
2044 | memaddr &= (CORE_ADDR) 0xffffffff; | |
2045 | ||
c906108c | 2046 | /* Round starting address down to longword boundary. */ |
4014092b | 2047 | addr = memaddr & ~3; |
c906108c | 2048 | /* Round ending address up; get number of longwords that makes. */ |
4014092b | 2049 | count = (((memaddr + len) - addr) + 3) / 4; |
c906108c | 2050 | /* Allocate buffer of that many longwords. */ |
4014092b | 2051 | buffer = alloca (count * 4); |
c906108c SS |
2052 | |
2053 | if (write) | |
2054 | { | |
2055 | /* Fill start and end extra bytes of buffer with existing data. */ | |
2056 | if (addr != memaddr || len < 4) | |
2057 | { | |
2058 | /* Need part of initial word -- fetch it. */ | |
2059 | store_unsigned_integer (&buffer[0], 4, mips_fetch_word (addr)); | |
2060 | } | |
2061 | ||
2062 | if (count > 1) | |
2063 | { | |
2064 | /* Need part of last word -- fetch it. FIXME: we do this even | |
2065 | if we don't need it. */ | |
2066 | store_unsigned_integer (&buffer[(count - 1) * 4], 4, | |
2067 | mips_fetch_word (addr + (count - 1) * 4)); | |
2068 | } | |
2069 | ||
2070 | /* Copy data to be written over corresponding part of buffer */ | |
2071 | ||
2072 | memcpy ((char *) buffer + (memaddr & 3), myaddr, len); | |
2073 | ||
2074 | /* Write the entire buffer. */ | |
2075 | ||
2076 | for (i = 0; i < count; i++, addr += 4) | |
2077 | { | |
2078 | status = mips_store_word (addr, | |
c5aa993b | 2079 | extract_unsigned_integer (&buffer[i * 4], 4), |
c906108c SS |
2080 | NULL); |
2081 | /* Report each kilobyte (we download 32-bit words at a time) */ | |
c5aa993b | 2082 | if (i % 256 == 255) |
c906108c SS |
2083 | { |
2084 | printf_unfiltered ("*"); | |
2085 | gdb_flush (gdb_stdout); | |
2086 | } | |
2087 | if (status) | |
2088 | { | |
2089 | errno = status; | |
2090 | return 0; | |
2091 | } | |
2092 | /* FIXME: Do we want a QUIT here? */ | |
2093 | } | |
2094 | if (count >= 256) | |
2095 | printf_unfiltered ("\n"); | |
2096 | } | |
2097 | else | |
2098 | { | |
2099 | /* Read all the longwords */ | |
2100 | for (i = 0; i < count; i++, addr += 4) | |
2101 | { | |
c5aa993b | 2102 | store_unsigned_integer (&buffer[i * 4], 4, mips_fetch_word (addr)); |
c906108c SS |
2103 | QUIT; |
2104 | } | |
2105 | ||
2106 | /* Copy appropriate bytes out of the buffer. */ | |
2107 | memcpy (myaddr, buffer + (memaddr & 3), len); | |
2108 | } | |
2109 | return len; | |
2110 | } | |
2111 | ||
2112 | /* Print info on this target. */ | |
2113 | ||
2114 | static void | |
fba45db2 | 2115 | mips_files_info (struct target_ops *ignore) |
c906108c SS |
2116 | { |
2117 | printf_unfiltered ("Debugging a MIPS board over a serial line.\n"); | |
2118 | } | |
2119 | ||
2120 | /* Kill the process running on the board. This will actually only | |
2121 | work if we are doing remote debugging over the console input. I | |
2122 | think that if IDT/sim had the remote debug interrupt enabled on the | |
2123 | right port, we could interrupt the process with a break signal. */ | |
2124 | ||
2125 | static void | |
fba45db2 | 2126 | mips_kill (void) |
c906108c SS |
2127 | { |
2128 | if (!mips_wait_flag) | |
2129 | return; | |
2130 | ||
2131 | interrupt_count++; | |
2132 | ||
2133 | if (interrupt_count >= 2) | |
2134 | { | |
2135 | interrupt_count = 0; | |
2136 | ||
2137 | target_terminal_ours (); | |
2138 | ||
2139 | if (query ("Interrupted while waiting for the program.\n\ | |
2140 | Give up (and stop debugging it)? ")) | |
2141 | { | |
2142 | /* Clean up in such a way that mips_close won't try to talk to the | |
2143 | board (it almost surely won't work since we weren't able to talk to | |
2144 | it). */ | |
2145 | mips_wait_flag = 0; | |
c5aa993b | 2146 | close_ports (); |
c906108c SS |
2147 | |
2148 | printf_unfiltered ("Ending remote MIPS debugging.\n"); | |
2149 | target_mourn_inferior (); | |
2150 | ||
b5a2688f | 2151 | throw_exception (RETURN_QUIT); |
c906108c SS |
2152 | } |
2153 | ||
2154 | target_terminal_inferior (); | |
2155 | } | |
2156 | ||
2157 | if (remote_debug > 0) | |
2158 | printf_unfiltered ("Sending break\n"); | |
2159 | ||
2cd58942 | 2160 | serial_send_break (mips_desc); |
c906108c SS |
2161 | |
2162 | #if 0 | |
2163 | if (mips_is_open) | |
2164 | { | |
2165 | char cc; | |
2166 | ||
2167 | /* Send a ^C. */ | |
2168 | cc = '\003'; | |
2cd58942 | 2169 | serial_write (mips_desc, &cc, 1); |
c906108c SS |
2170 | sleep (1); |
2171 | target_mourn_inferior (); | |
2172 | } | |
2173 | #endif | |
2174 | } | |
2175 | ||
2176 | /* Start running on the target board. */ | |
2177 | ||
2178 | static void | |
c27cda74 | 2179 | mips_create_inferior (char *execfile, char *args, char **env, int from_tty) |
c906108c SS |
2180 | { |
2181 | CORE_ADDR entry_pt; | |
2182 | ||
2183 | if (args && *args) | |
2184 | { | |
2185 | warning ("\ | |
2186 | Can't pass arguments to remote MIPS board; arguments ignored."); | |
2187 | /* And don't try to use them on the next "run" command. */ | |
2188 | execute_command ("set args", 0); | |
2189 | } | |
2190 | ||
2191 | if (execfile == 0 || exec_bfd == 0) | |
2192 | error ("No executable file specified"); | |
2193 | ||
2194 | entry_pt = (CORE_ADDR) bfd_get_start_address (exec_bfd); | |
2195 | ||
2196 | init_wait_for_inferior (); | |
2197 | ||
39f77062 | 2198 | /* FIXME: Should we set inferior_ptid here? */ |
c906108c SS |
2199 | |
2200 | proceed (entry_pt, TARGET_SIGNAL_DEFAULT, 0); | |
2201 | } | |
2202 | ||
2203 | /* Clean up after a process. Actually nothing to do. */ | |
2204 | ||
2205 | static void | |
fba45db2 | 2206 | mips_mourn_inferior (void) |
c906108c SS |
2207 | { |
2208 | if (current_ops != NULL) | |
2209 | unpush_target (current_ops); | |
2210 | generic_mourn_inferior (); | |
2211 | } | |
2212 | \f | |
2213 | /* We can write a breakpoint and read the shadow contents in one | |
2214 | operation. */ | |
2215 | ||
aaab4dba AC |
2216 | /* Insert a breakpoint. On targets that don't have built-in |
2217 | breakpoint support, we read the contents of the target location and | |
2218 | stash it, then overwrite it with a breakpoint instruction. ADDR is | |
2219 | the target location in the target machine. CONTENTS_CACHE is a | |
2220 | pointer to memory allocated for saving the target contents. It is | |
2221 | guaranteed by the caller to be long enough to save the breakpoint | |
2222 | length returned by BREAKPOINT_FROM_PC. */ | |
c906108c SS |
2223 | |
2224 | static int | |
fba45db2 | 2225 | mips_insert_breakpoint (CORE_ADDR addr, char *contents_cache) |
c906108c SS |
2226 | { |
2227 | if (monitor_supports_breakpoints) | |
95ac2dcf | 2228 | return set_breakpoint (addr, MIPS_INSN32_SIZE, BREAK_FETCH); |
c906108c SS |
2229 | else |
2230 | return memory_insert_breakpoint (addr, contents_cache); | |
2231 | } | |
2232 | ||
2233 | static int | |
fba45db2 | 2234 | mips_remove_breakpoint (CORE_ADDR addr, char *contents_cache) |
c906108c SS |
2235 | { |
2236 | if (monitor_supports_breakpoints) | |
95ac2dcf | 2237 | return clear_breakpoint (addr, MIPS_INSN32_SIZE, BREAK_FETCH); |
c906108c SS |
2238 | else |
2239 | return memory_remove_breakpoint (addr, contents_cache); | |
2240 | } | |
2241 | ||
c906108c SS |
2242 | /* Tell whether this target can support a hardware breakpoint. CNT |
2243 | is the number of hardware breakpoints already installed. This | |
2244 | implements the TARGET_CAN_USE_HARDWARE_WATCHPOINT macro. */ | |
2245 | ||
2246 | int | |
546143b6 | 2247 | mips_can_use_watchpoint (int type, int cnt, int othertype) |
c906108c | 2248 | { |
c5aa993b | 2249 | return cnt < MAX_LSI_BREAKPOINTS && strcmp (target_shortname, "lsi") == 0; |
c906108c SS |
2250 | } |
2251 | ||
2252 | ||
2253 | /* Compute a don't care mask for the region bounding ADDR and ADDR + LEN - 1. | |
2254 | This is used for memory ref breakpoints. */ | |
2255 | ||
2256 | static unsigned long | |
fba45db2 | 2257 | calculate_mask (CORE_ADDR addr, int len) |
c906108c SS |
2258 | { |
2259 | unsigned long mask; | |
2260 | int i; | |
2261 | ||
2262 | mask = addr ^ (addr + len - 1); | |
2263 | ||
2264 | for (i = 32; i >= 0; i--) | |
2265 | if (mask == 0) | |
2266 | break; | |
2267 | else | |
2268 | mask >>= 1; | |
2269 | ||
2270 | mask = (unsigned long) 0xffffffff >> i; | |
2271 | ||
2272 | return mask; | |
2273 | } | |
2274 | ||
2275 | ||
c906108c SS |
2276 | /* Set a data watchpoint. ADDR and LEN should be obvious. TYPE is 0 |
2277 | for a write watchpoint, 1 for a read watchpoint, or 2 for a read/write | |
2278 | watchpoint. */ | |
2279 | ||
2280 | int | |
546143b6 | 2281 | mips_insert_watchpoint (CORE_ADDR addr, int len, int type) |
c906108c SS |
2282 | { |
2283 | if (set_breakpoint (addr, len, type)) | |
2284 | return -1; | |
2285 | ||
2286 | return 0; | |
2287 | } | |
2288 | ||
2289 | int | |
546143b6 | 2290 | mips_remove_watchpoint (CORE_ADDR addr, int len, int type) |
c906108c SS |
2291 | { |
2292 | if (clear_breakpoint (addr, len, type)) | |
2293 | return -1; | |
2294 | ||
2295 | return 0; | |
2296 | } | |
2297 | ||
2298 | int | |
546143b6 | 2299 | mips_stopped_by_watchpoint (void) |
c906108c SS |
2300 | { |
2301 | return hit_watchpoint; | |
2302 | } | |
2303 | ||
2304 | ||
2305 | /* Insert a breakpoint. */ | |
2306 | ||
2307 | static int | |
fba45db2 | 2308 | set_breakpoint (CORE_ADDR addr, int len, enum break_type type) |
c906108c SS |
2309 | { |
2310 | return common_breakpoint (1, addr, len, type); | |
2311 | } | |
2312 | ||
2313 | ||
2314 | /* Clear a breakpoint. */ | |
2315 | ||
2316 | static int | |
fba45db2 | 2317 | clear_breakpoint (CORE_ADDR addr, int len, enum break_type type) |
c906108c SS |
2318 | { |
2319 | return common_breakpoint (0, addr, len, type); | |
2320 | } | |
2321 | ||
2322 | ||
2323 | /* Check the error code from the return packet for an LSI breakpoint | |
2324 | command. If there's no error, just return 0. If it's a warning, | |
2325 | print the warning text and return 0. If it's an error, print | |
2326 | the error text and return 1. <ADDR> is the address of the breakpoint | |
2327 | that was being set. <RERRFLG> is the error code returned by PMON. | |
2328 | This is a helper function for common_breakpoint. */ | |
2329 | ||
2330 | static int | |
fba45db2 | 2331 | check_lsi_error (CORE_ADDR addr, int rerrflg) |
c906108c SS |
2332 | { |
2333 | struct lsi_error *err; | |
2334 | char *saddr = paddr_nz (addr); /* printable address string */ | |
2335 | ||
2336 | if (rerrflg == 0) /* no error */ | |
2337 | return 0; | |
2338 | ||
2339 | /* Warnings can be ORed together, so check them all. */ | |
2340 | if (rerrflg & W_WARN) | |
2341 | { | |
2342 | if (monitor_warnings) | |
2343 | { | |
2344 | int found = 0; | |
2345 | for (err = lsi_warning_table; err->code != 0; err++) | |
2346 | { | |
2347 | if ((err->code & rerrflg) == err->code) | |
2348 | { | |
2349 | found = 1; | |
2350 | fprintf_unfiltered (gdb_stderr, | |
c5aa993b | 2351 | "common_breakpoint (0x%s): Warning: %s\n", |
c906108c SS |
2352 | saddr, |
2353 | err->string); | |
2354 | } | |
2355 | } | |
2356 | if (!found) | |
2357 | fprintf_unfiltered (gdb_stderr, | |
c5aa993b | 2358 | "common_breakpoint (0x%s): Unknown warning: 0x%x\n", |
c906108c SS |
2359 | saddr, |
2360 | rerrflg); | |
2361 | } | |
2362 | return 0; | |
2363 | } | |
2364 | ||
2365 | /* Errors are unique, i.e. can't be ORed together. */ | |
2366 | for (err = lsi_error_table; err->code != 0; err++) | |
2367 | { | |
2368 | if ((err->code & rerrflg) == err->code) | |
2369 | { | |
2370 | fprintf_unfiltered (gdb_stderr, | |
2371 | "common_breakpoint (0x%s): Error: %s\n", | |
2372 | saddr, | |
2373 | err->string); | |
2374 | return 1; | |
2375 | } | |
2376 | } | |
2377 | fprintf_unfiltered (gdb_stderr, | |
2378 | "common_breakpoint (0x%s): Unknown error: 0x%x\n", | |
2379 | saddr, | |
2380 | rerrflg); | |
2381 | return 1; | |
2382 | } | |
2383 | ||
2384 | ||
2385 | /* This routine sends a breakpoint command to the remote target. | |
2386 | ||
2387 | <SET> is 1 if setting a breakpoint, or 0 if clearing a breakpoint. | |
2388 | <ADDR> is the address of the breakpoint. | |
2389 | <LEN> the length of the region to break on. | |
2390 | <TYPE> is the type of breakpoint: | |
c5aa993b JM |
2391 | 0 = write (BREAK_WRITE) |
2392 | 1 = read (BREAK_READ) | |
2393 | 2 = read/write (BREAK_ACCESS) | |
2394 | 3 = instruction fetch (BREAK_FETCH) | |
c906108c SS |
2395 | |
2396 | Return 0 if successful; otherwise 1. */ | |
2397 | ||
2398 | static int | |
fba45db2 | 2399 | common_breakpoint (int set, CORE_ADDR addr, int len, enum break_type type) |
c906108c SS |
2400 | { |
2401 | char buf[DATA_MAXLEN + 1]; | |
2402 | char cmd, rcmd; | |
2403 | int rpid, rerrflg, rresponse, rlen; | |
2404 | int nfields; | |
2405 | ||
2406 | addr = ADDR_BITS_REMOVE (addr); | |
2407 | ||
2408 | if (mips_monitor == MON_LSI) | |
2409 | { | |
c5aa993b | 2410 | if (set == 0) /* clear breakpoint */ |
c906108c SS |
2411 | { |
2412 | /* The LSI PMON "clear breakpoint" has this form: | |
c5aa993b JM |
2413 | <pid> 'b' <bptn> 0x0 |
2414 | reply: | |
2415 | <pid> 'b' 0x0 <code> | |
c906108c SS |
2416 | |
2417 | <bptn> is a breakpoint number returned by an earlier 'B' command. | |
2418 | Possible return codes: OK, E_BPT. */ | |
2419 | ||
2420 | int i; | |
2421 | ||
2422 | /* Search for the breakpoint in the table. */ | |
2423 | for (i = 0; i < MAX_LSI_BREAKPOINTS; i++) | |
2424 | if (lsi_breakpoints[i].type == type | |
2425 | && lsi_breakpoints[i].addr == addr | |
2426 | && lsi_breakpoints[i].len == len) | |
2427 | break; | |
2428 | ||
2429 | /* Clear the table entry and tell PMON to clear the breakpoint. */ | |
2430 | if (i == MAX_LSI_BREAKPOINTS) | |
2431 | { | |
2432 | warning ("common_breakpoint: Attempt to clear bogus breakpoint at %s\n", | |
2433 | paddr_nz (addr)); | |
2434 | return 1; | |
2435 | } | |
2436 | ||
2437 | lsi_breakpoints[i].type = BREAK_UNUSED; | |
2438 | sprintf (buf, "0x0 b 0x%x 0x0", i); | |
2439 | mips_send_packet (buf, 1); | |
2440 | ||
2441 | rlen = mips_receive_packet (buf, 1, mips_receive_wait); | |
2442 | buf[rlen] = '\0'; | |
2443 | ||
2444 | nfields = sscanf (buf, "0x%x b 0x0 0x%x", &rpid, &rerrflg); | |
2445 | if (nfields != 2) | |
2446 | mips_error ("common_breakpoint: Bad response from remote board: %s", buf); | |
2447 | ||
2448 | return (check_lsi_error (addr, rerrflg)); | |
2449 | } | |
c5aa993b JM |
2450 | else |
2451 | /* set a breakpoint */ | |
c906108c SS |
2452 | { |
2453 | /* The LSI PMON "set breakpoint" command has this form: | |
c5aa993b JM |
2454 | <pid> 'B' <addr> 0x0 |
2455 | reply: | |
2456 | <pid> 'B' <bptn> <code> | |
c906108c SS |
2457 | |
2458 | The "set data breakpoint" command has this form: | |
2459 | ||
c5aa993b | 2460 | <pid> 'A' <addr1> <type> [<addr2> [<value>]] |
c906108c | 2461 | |
c5aa993b JM |
2462 | where: type= "0x1" = read |
2463 | "0x2" = write | |
2464 | "0x3" = access (read or write) | |
c906108c SS |
2465 | |
2466 | The reply returns two values: | |
c5aa993b JM |
2467 | bptn - a breakpoint number, which is a small integer with |
2468 | possible values of zero through 255. | |
2469 | code - an error return code, a value of zero indicates a | |
2470 | succesful completion, other values indicate various | |
2471 | errors and warnings. | |
2472 | ||
c906108c SS |
2473 | Possible return codes: OK, W_QAL, E_QAL, E_OUT, E_NON. |
2474 | ||
c5aa993b | 2475 | */ |
c906108c SS |
2476 | |
2477 | if (type == BREAK_FETCH) /* instruction breakpoint */ | |
2478 | { | |
2479 | cmd = 'B'; | |
2480 | sprintf (buf, "0x0 B 0x%s 0x0", paddr_nz (addr)); | |
2481 | } | |
c5aa993b JM |
2482 | else |
2483 | /* watchpoint */ | |
c906108c SS |
2484 | { |
2485 | cmd = 'A'; | |
2486 | sprintf (buf, "0x0 A 0x%s 0x%x 0x%s", paddr_nz (addr), | |
c5aa993b | 2487 | type == BREAK_READ ? 1 : (type == BREAK_WRITE ? 2 : 3), |
c906108c SS |
2488 | paddr_nz (addr + len - 1)); |
2489 | } | |
2490 | mips_send_packet (buf, 1); | |
2491 | ||
2492 | rlen = mips_receive_packet (buf, 1, mips_receive_wait); | |
2493 | buf[rlen] = '\0'; | |
2494 | ||
2495 | nfields = sscanf (buf, "0x%x %c 0x%x 0x%x", | |
2496 | &rpid, &rcmd, &rresponse, &rerrflg); | |
2497 | if (nfields != 4 || rcmd != cmd || rresponse > 255) | |
2498 | mips_error ("common_breakpoint: Bad response from remote board: %s", buf); | |
2499 | ||
2500 | if (rerrflg != 0) | |
2501 | if (check_lsi_error (addr, rerrflg)) | |
2502 | return 1; | |
2503 | ||
2504 | /* rresponse contains PMON's breakpoint number. Record the | |
2505 | information for this breakpoint so we can clear it later. */ | |
2506 | lsi_breakpoints[rresponse].type = type; | |
2507 | lsi_breakpoints[rresponse].addr = addr; | |
c5aa993b | 2508 | lsi_breakpoints[rresponse].len = len; |
c906108c SS |
2509 | |
2510 | return 0; | |
2511 | } | |
2512 | } | |
2513 | else | |
2514 | { | |
2515 | /* On non-LSI targets, the breakpoint command has this form: | |
c5aa993b JM |
2516 | 0x0 <CMD> <ADDR> <MASK> <FLAGS> |
2517 | <MASK> is a don't care mask for addresses. | |
2518 | <FLAGS> is any combination of `r', `w', or `f' for read/write/fetch. | |
c906108c SS |
2519 | */ |
2520 | unsigned long mask; | |
2521 | ||
2522 | mask = calculate_mask (addr, len); | |
2523 | addr &= ~mask; | |
2524 | ||
c5aa993b JM |
2525 | if (set) /* set a breakpoint */ |
2526 | { | |
c906108c SS |
2527 | char *flags; |
2528 | switch (type) | |
2529 | { | |
c5aa993b | 2530 | case BREAK_WRITE: /* write */ |
c906108c SS |
2531 | flags = "w"; |
2532 | break; | |
c5aa993b | 2533 | case BREAK_READ: /* read */ |
c906108c SS |
2534 | flags = "r"; |
2535 | break; | |
c5aa993b | 2536 | case BREAK_ACCESS: /* read/write */ |
c906108c SS |
2537 | flags = "rw"; |
2538 | break; | |
c5aa993b | 2539 | case BREAK_FETCH: /* fetch */ |
c906108c SS |
2540 | flags = "f"; |
2541 | break; | |
2542 | default: | |
e1e9e218 | 2543 | internal_error (__FILE__, __LINE__, "failed internal consistency check"); |
c906108c SS |
2544 | } |
2545 | ||
2546 | cmd = 'B'; | |
2547 | sprintf (buf, "0x0 B 0x%s 0x%s %s", paddr_nz (addr), | |
2548 | paddr_nz (mask), flags); | |
2549 | } | |
2550 | else | |
2551 | { | |
2552 | cmd = 'b'; | |
2553 | sprintf (buf, "0x0 b 0x%s", paddr_nz (addr)); | |
2554 | } | |
2555 | ||
2556 | mips_send_packet (buf, 1); | |
2557 | ||
2558 | rlen = mips_receive_packet (buf, 1, mips_receive_wait); | |
2559 | buf[rlen] = '\0'; | |
2560 | ||
2561 | nfields = sscanf (buf, "0x%x %c 0x%x 0x%x", | |
2562 | &rpid, &rcmd, &rerrflg, &rresponse); | |
2563 | ||
2564 | if (nfields != 4 || rcmd != cmd) | |
2565 | mips_error ("common_breakpoint: Bad response from remote board: %s", | |
2566 | buf); | |
2567 | ||
2568 | if (rerrflg != 0) | |
2569 | { | |
2570 | /* Ddb returns "0x0 b 0x16 0x0\000", whereas | |
2571 | Cogent returns "0x0 b 0xffffffff 0x16\000": */ | |
2572 | if (mips_monitor == MON_DDB) | |
2573 | rresponse = rerrflg; | |
c5aa993b | 2574 | if (rresponse != 22) /* invalid argument */ |
c906108c | 2575 | fprintf_unfiltered (gdb_stderr, |
c5aa993b | 2576 | "common_breakpoint (0x%s): Got error: 0x%x\n", |
c906108c SS |
2577 | paddr_nz (addr), rresponse); |
2578 | return 1; | |
2579 | } | |
2580 | } | |
2581 | return 0; | |
2582 | } | |
2583 | \f | |
2584 | static void | |
fba45db2 | 2585 | send_srec (char *srec, int len, CORE_ADDR addr) |
c906108c SS |
2586 | { |
2587 | while (1) | |
2588 | { | |
2589 | int ch; | |
2590 | ||
2cd58942 | 2591 | serial_write (mips_desc, srec, len); |
c906108c | 2592 | |
688991e6 | 2593 | ch = mips_readchar (remote_timeout); |
c906108c SS |
2594 | |
2595 | switch (ch) | |
2596 | { | |
2597 | case SERIAL_TIMEOUT: | |
2598 | error ("Timeout during download."); | |
2599 | break; | |
2600 | case 0x6: /* ACK */ | |
2601 | return; | |
2602 | case 0x15: /* NACK */ | |
d4f3574e | 2603 | fprintf_unfiltered (gdb_stderr, "Download got a NACK at byte %s! Retrying.\n", paddr_u (addr)); |
c906108c SS |
2604 | continue; |
2605 | default: | |
2606 | error ("Download got unexpected ack char: 0x%x, retrying.\n", ch); | |
2607 | } | |
2608 | } | |
2609 | } | |
2610 | ||
2611 | /* Download a binary file by converting it to S records. */ | |
2612 | ||
2613 | static void | |
fba45db2 | 2614 | mips_load_srec (char *args) |
c906108c SS |
2615 | { |
2616 | bfd *abfd; | |
2617 | asection *s; | |
2618 | char *buffer, srec[1024]; | |
2619 | unsigned int i; | |
2620 | unsigned int srec_frame = 200; | |
2621 | int reclen; | |
2622 | static int hashmark = 1; | |
2623 | ||
2624 | buffer = alloca (srec_frame * 2 + 256); | |
2625 | ||
2626 | abfd = bfd_openr (args, 0); | |
2627 | if (!abfd) | |
2628 | { | |
2629 | printf_filtered ("Unable to open file %s\n", args); | |
2630 | return; | |
2631 | } | |
2632 | ||
2633 | if (bfd_check_format (abfd, bfd_object) == 0) | |
2634 | { | |
2635 | printf_filtered ("File is not an object file\n"); | |
2636 | return; | |
2637 | } | |
2638 | ||
2639 | /* This actually causes a download in the IDT binary format: */ | |
2640 | mips_send_command (LOAD_CMD, 0); | |
2641 | ||
2642 | for (s = abfd->sections; s; s = s->next) | |
2643 | { | |
2644 | if (s->flags & SEC_LOAD) | |
2645 | { | |
2646 | unsigned int numbytes; | |
2647 | ||
d4f3574e SS |
2648 | /* FIXME! vma too small????? */ |
2649 | printf_filtered ("%s\t: 0x%4lx .. 0x%4lx ", s->name, | |
2650 | (long) s->vma, | |
2c500098 | 2651 | (long) (s->vma + bfd_get_section_size (s))); |
c906108c SS |
2652 | gdb_flush (gdb_stdout); |
2653 | ||
2c500098 | 2654 | for (i = 0; i < bfd_get_section_size (s); i += numbytes) |
c906108c | 2655 | { |
2c500098 | 2656 | numbytes = min (srec_frame, bfd_get_section_size (s) - i); |
c906108c SS |
2657 | |
2658 | bfd_get_section_contents (abfd, s, buffer, i, numbytes); | |
2659 | ||
1fa79fac MS |
2660 | reclen = mips_make_srec (srec, '3', s->vma + i, |
2661 | buffer, numbytes); | |
c906108c SS |
2662 | send_srec (srec, reclen, s->vma + i); |
2663 | ||
9a4105ab AC |
2664 | if (deprecated_ui_load_progress_hook) |
2665 | deprecated_ui_load_progress_hook (s->name, i); | |
7829b833 | 2666 | |
c906108c SS |
2667 | if (hashmark) |
2668 | { | |
2669 | putchar_unfiltered ('#'); | |
2670 | gdb_flush (gdb_stdout); | |
2671 | } | |
2672 | ||
c5aa993b JM |
2673 | } /* Per-packet (or S-record) loop */ |
2674 | ||
c906108c | 2675 | putchar_unfiltered ('\n'); |
c5aa993b | 2676 | } /* Loadable sections */ |
c906108c | 2677 | } |
c5aa993b | 2678 | if (hashmark) |
c906108c | 2679 | putchar_unfiltered ('\n'); |
c5aa993b | 2680 | |
c906108c SS |
2681 | /* Write a type 7 terminator record. no data for a type 7, and there |
2682 | is no data, so len is 0. */ | |
2683 | ||
2684 | reclen = mips_make_srec (srec, '7', abfd->start_address, NULL, 0); | |
2685 | ||
2686 | send_srec (srec, reclen, abfd->start_address); | |
2687 | ||
2cd58942 | 2688 | serial_flush_input (mips_desc); |
c906108c SS |
2689 | } |
2690 | ||
2691 | /* | |
2692 | * mips_make_srec -- make an srecord. This writes each line, one at a | |
c5aa993b JM |
2693 | * time, each with it's own header and trailer line. |
2694 | * An srecord looks like this: | |
c906108c SS |
2695 | * |
2696 | * byte count-+ address | |
2697 | * start ---+ | | data +- checksum | |
c5aa993b JM |
2698 | * | | | | |
2699 | * S01000006F6B692D746573742E73726563E4 | |
2700 | * S315000448600000000000000000FC00005900000000E9 | |
2701 | * S31A0004000023C1400037DE00F023604000377B009020825000348D | |
2702 | * S30B0004485A0000000000004E | |
2703 | * S70500040000F6 | |
c906108c | 2704 | * |
c5aa993b | 2705 | * S<type><length><address><data><checksum> |
c906108c SS |
2706 | * |
2707 | * Where | |
2708 | * - length | |
2709 | * is the number of bytes following upto the checksum. Note that | |
2710 | * this is not the number of chars following, since it takes two | |
2711 | * chars to represent a byte. | |
2712 | * - type | |
2713 | * is one of: | |
2714 | * 0) header record | |
2715 | * 1) two byte address data record | |
2716 | * 2) three byte address data record | |
2717 | * 3) four byte address data record | |
2718 | * 7) four byte address termination record | |
2719 | * 8) three byte address termination record | |
2720 | * 9) two byte address termination record | |
2721 | * | |
2722 | * - address | |
2723 | * is the start address of the data following, or in the case of | |
2724 | * a termination record, the start address of the image | |
2725 | * - data | |
2726 | * is the data. | |
2727 | * - checksum | |
c5aa993b | 2728 | * is the sum of all the raw byte data in the record, from the length |
c906108c SS |
2729 | * upwards, modulo 256 and subtracted from 255. |
2730 | * | |
2731 | * This routine returns the length of the S-record. | |
2732 | * | |
2733 | */ | |
2734 | ||
2735 | static int | |
fba45db2 KB |
2736 | mips_make_srec (char *buf, int type, CORE_ADDR memaddr, unsigned char *myaddr, |
2737 | int len) | |
c906108c SS |
2738 | { |
2739 | unsigned char checksum; | |
2740 | int i; | |
2741 | ||
2742 | /* Create the header for the srec. addr_size is the number of bytes in the address, | |
2743 | and 1 is the number of bytes in the count. */ | |
2744 | ||
2745 | /* FIXME!! bigger buf required for 64-bit! */ | |
2746 | buf[0] = 'S'; | |
2747 | buf[1] = type; | |
2748 | buf[2] = len + 4 + 1; /* len + 4 byte address + 1 byte checksum */ | |
2749 | /* This assumes S3 style downloads (4byte addresses). There should | |
2750 | probably be a check, or the code changed to make it more | |
2751 | explicit. */ | |
2752 | buf[3] = memaddr >> 24; | |
2753 | buf[4] = memaddr >> 16; | |
2754 | buf[5] = memaddr >> 8; | |
2755 | buf[6] = memaddr; | |
2756 | memcpy (&buf[7], myaddr, len); | |
2757 | ||
2758 | /* Note that the checksum is calculated on the raw data, not the | |
2759 | hexified data. It includes the length, address and the data | |
2760 | portions of the packet. */ | |
2761 | checksum = 0; | |
2762 | buf += 2; /* Point at length byte */ | |
2763 | for (i = 0; i < len + 4 + 1; i++) | |
2764 | checksum += *buf++; | |
2765 | ||
2766 | *buf = ~checksum; | |
2767 | ||
2768 | return len + 8; | |
2769 | } | |
2770 | ||
2771 | /* The following manifest controls whether we enable the simple flow | |
2772 | control support provided by the monitor. If enabled the code will | |
2773 | wait for an affirmative ACK between transmitting packets. */ | |
2774 | #define DOETXACK (1) | |
2775 | ||
2776 | /* The PMON fast-download uses an encoded packet format constructed of | |
2777 | 3byte data packets (encoded as 4 printable ASCII characters), and | |
2778 | escape sequences (preceded by a '/'): | |
2779 | ||
c5aa993b JM |
2780 | 'K' clear checksum |
2781 | 'C' compare checksum (12bit value, not included in checksum calculation) | |
2782 | 'S' define symbol name (for addr) terminated with "," and padded to 4char boundary | |
2783 | 'Z' zero fill multiple of 3bytes | |
2784 | 'B' byte (12bit encoded value, of 8bit data) | |
2785 | 'A' address (36bit encoded value) | |
2786 | 'E' define entry as original address, and exit load | |
c906108c SS |
2787 | |
2788 | The packets are processed in 4 character chunks, so the escape | |
2789 | sequences that do not have any data (or variable length data) | |
2790 | should be padded to a 4 character boundary. The decoder will give | |
2791 | an error if the complete message block size is not a multiple of | |
2792 | 4bytes (size of record). | |
2793 | ||
2794 | The encoding of numbers is done in 6bit fields. The 6bit value is | |
2795 | used to index into this string to get the specific character | |
2796 | encoding for the value: */ | |
2797 | static char encoding[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789,."; | |
2798 | ||
2799 | /* Convert the number of bits required into an encoded number, 6bits | |
2800 | at a time (range 0..63). Keep a checksum if required (passed | |
2801 | pointer non-NULL). The function returns the number of encoded | |
2802 | characters written into the buffer. */ | |
2803 | static int | |
fba45db2 | 2804 | pmon_makeb64 (unsigned long v, char *p, int n, int *chksum) |
c906108c SS |
2805 | { |
2806 | int count = (n / 6); | |
2807 | ||
c5aa993b JM |
2808 | if ((n % 12) != 0) |
2809 | { | |
2810 | fprintf_unfiltered (gdb_stderr, | |
2811 | "Fast encoding bitcount must be a multiple of 12bits: %dbit%s\n", n, (n == 1) ? "" : "s"); | |
2812 | return (0); | |
2813 | } | |
2814 | if (n > 36) | |
2815 | { | |
2816 | fprintf_unfiltered (gdb_stderr, | |
2817 | "Fast encoding cannot process more than 36bits at the moment: %dbits\n", n); | |
2818 | return (0); | |
2819 | } | |
c906108c SS |
2820 | |
2821 | /* Deal with the checksum: */ | |
c5aa993b JM |
2822 | if (chksum != NULL) |
2823 | { | |
2824 | switch (n) | |
2825 | { | |
2826 | case 36: | |
2827 | *chksum += ((v >> 24) & 0xFFF); | |
2828 | case 24: | |
2829 | *chksum += ((v >> 12) & 0xFFF); | |
2830 | case 12: | |
2831 | *chksum += ((v >> 0) & 0xFFF); | |
2832 | } | |
c906108c | 2833 | } |
c906108c | 2834 | |
c5aa993b JM |
2835 | do |
2836 | { | |
2837 | n -= 6; | |
2838 | *p++ = encoding[(v >> n) & 0x3F]; | |
2839 | } | |
2840 | while (n > 0); | |
c906108c | 2841 | |
c5aa993b | 2842 | return (count); |
c906108c SS |
2843 | } |
2844 | ||
2845 | /* Shorthand function (that could be in-lined) to output the zero-fill | |
2846 | escape sequence into the data stream. */ | |
2847 | static int | |
fba45db2 | 2848 | pmon_zeroset (int recsize, char **buff, int *amount, unsigned int *chksum) |
c906108c SS |
2849 | { |
2850 | int count; | |
2851 | ||
c5aa993b | 2852 | sprintf (*buff, "/Z"); |
c906108c SS |
2853 | count = pmon_makeb64 (*amount, (*buff + 2), 12, chksum); |
2854 | *buff += (count + 2); | |
2855 | *amount = 0; | |
c5aa993b | 2856 | return (recsize + count + 2); |
c906108c SS |
2857 | } |
2858 | ||
2859 | static int | |
fba45db2 | 2860 | pmon_checkset (int recsize, char **buff, int *value) |
c906108c SS |
2861 | { |
2862 | int count; | |
2863 | ||
2864 | /* Add the checksum (without updating the value): */ | |
2865 | sprintf (*buff, "/C"); | |
2866 | count = pmon_makeb64 (*value, (*buff + 2), 12, NULL); | |
2867 | *buff += (count + 2); | |
2868 | sprintf (*buff, "\n"); | |
c5aa993b | 2869 | *buff += 2; /* include zero terminator */ |
c906108c SS |
2870 | /* Forcing a checksum validation clears the sum: */ |
2871 | *value = 0; | |
c5aa993b | 2872 | return (recsize + count + 3); |
c906108c SS |
2873 | } |
2874 | ||
2875 | /* Amount of padding we leave after at the end of the output buffer, | |
2876 | for the checksum and line termination characters: */ | |
2877 | #define CHECKSIZE (4 + 4 + 4 + 2) | |
2878 | /* zero-fill, checksum, transfer end and line termination space. */ | |
2879 | ||
2880 | /* The amount of binary data loaded from the object file in a single | |
2881 | operation: */ | |
2882 | #define BINCHUNK (1024) | |
2883 | ||
2884 | /* Maximum line of data accepted by the monitor: */ | |
2885 | #define MAXRECSIZE (550) | |
2886 | /* NOTE: This constant depends on the monitor being used. This value | |
2887 | is for PMON 5.x on the Cogent Vr4300 board. */ | |
2888 | ||
2889 | static void | |
fba45db2 KB |
2890 | pmon_make_fastrec (char **outbuf, unsigned char *inbuf, int *inptr, |
2891 | int inamount, int *recsize, unsigned int *csum, | |
2892 | unsigned int *zerofill) | |
c906108c SS |
2893 | { |
2894 | int count = 0; | |
2895 | char *p = *outbuf; | |
2896 | ||
2897 | /* This is a simple check to ensure that our data will fit within | |
2898 | the maximum allowable record size. Each record output is 4bytes | |
2899 | in length. We must allow space for a pending zero fill command, | |
2900 | the record, and a checksum record. */ | |
c5aa993b JM |
2901 | while ((*recsize < (MAXRECSIZE - CHECKSIZE)) && ((inamount - *inptr) > 0)) |
2902 | { | |
2903 | /* Process the binary data: */ | |
2904 | if ((inamount - *inptr) < 3) | |
2905 | { | |
2906 | if (*zerofill != 0) | |
2907 | *recsize = pmon_zeroset (*recsize, &p, zerofill, csum); | |
2908 | sprintf (p, "/B"); | |
2909 | count = pmon_makeb64 (inbuf[*inptr], &p[2], 12, csum); | |
2910 | p += (2 + count); | |
2911 | *recsize += (2 + count); | |
2912 | (*inptr)++; | |
2913 | } | |
2914 | else | |
2915 | { | |
2916 | unsigned int value = ((inbuf[*inptr + 0] << 16) | (inbuf[*inptr + 1] << 8) | inbuf[*inptr + 2]); | |
2917 | /* Simple check for zero data. TODO: A better check would be | |
2918 | to check the last, and then the middle byte for being zero | |
2919 | (if the first byte is not). We could then check for | |
2920 | following runs of zeros, and if above a certain size it is | |
2921 | worth the 4 or 8 character hit of the byte insertions used | |
2922 | to pad to the start of the zeroes. NOTE: This also depends | |
2923 | on the alignment at the end of the zero run. */ | |
2924 | if (value == 0x00000000) | |
2925 | { | |
2926 | (*zerofill)++; | |
2927 | if (*zerofill == 0xFFF) /* 12bit counter */ | |
2928 | *recsize = pmon_zeroset (*recsize, &p, zerofill, csum); | |
2929 | } | |
2930 | else | |
2931 | { | |
2932 | if (*zerofill != 0) | |
2933 | *recsize = pmon_zeroset (*recsize, &p, zerofill, csum); | |
2934 | count = pmon_makeb64 (value, p, 24, csum); | |
2935 | p += count; | |
2936 | *recsize += count; | |
2937 | } | |
2938 | *inptr += 3; | |
2939 | } | |
c906108c | 2940 | } |
c906108c SS |
2941 | |
2942 | *outbuf = p; | |
2943 | return; | |
2944 | } | |
2945 | ||
2946 | static int | |
fba45db2 | 2947 | pmon_check_ack (char *mesg) |
c906108c SS |
2948 | { |
2949 | #if defined(DOETXACK) | |
2950 | int c; | |
2951 | ||
2952 | if (!tftp_in_use) | |
2953 | { | |
2cd58942 | 2954 | c = serial_readchar (udp_in_use ? udp_desc : mips_desc, |
688991e6 | 2955 | remote_timeout); |
c906108c SS |
2956 | if ((c == SERIAL_TIMEOUT) || (c != 0x06)) |
2957 | { | |
2958 | fprintf_unfiltered (gdb_stderr, | |
2959 | "Failed to receive valid ACK for %s\n", mesg); | |
c5aa993b | 2960 | return (-1); /* terminate the download */ |
c906108c SS |
2961 | } |
2962 | } | |
2963 | #endif /* DOETXACK */ | |
c5aa993b | 2964 | return (0); |
c906108c SS |
2965 | } |
2966 | ||
2967 | /* pmon_download - Send a sequence of characters to the PMON download port, | |
2968 | which is either a serial port or a UDP socket. */ | |
2969 | ||
2970 | static void | |
fba45db2 | 2971 | pmon_start_download (void) |
c906108c SS |
2972 | { |
2973 | if (tftp_in_use) | |
2974 | { | |
2975 | /* Create the temporary download file. */ | |
2976 | if ((tftp_file = fopen (tftp_localname, "w")) == NULL) | |
2977 | perror_with_name (tftp_localname); | |
2978 | } | |
2979 | else | |
2980 | { | |
2981 | mips_send_command (udp_in_use ? LOAD_CMD_UDP : LOAD_CMD, 0); | |
2982 | mips_expect ("Downloading from "); | |
2983 | mips_expect (udp_in_use ? "udp" : "tty0"); | |
2984 | mips_expect (", ^C to abort\r\n"); | |
2985 | } | |
2986 | } | |
2987 | ||
2988 | static int | |
2989 | mips_expect_download (char *string) | |
2990 | { | |
2991 | if (!mips_expect (string)) | |
2992 | { | |
2993 | fprintf_unfiltered (gdb_stderr, "Load did not complete successfully.\n"); | |
2994 | if (tftp_in_use) | |
2995 | remove (tftp_localname); /* Remove temporary file */ | |
2996 | return 0; | |
2997 | } | |
2998 | else | |
2999 | return 1; | |
3000 | } | |
3001 | ||
688991e6 AC |
3002 | static void |
3003 | pmon_check_entry_address (char *entry_address, int final) | |
3004 | { | |
3005 | char hexnumber[9]; /* includes '\0' space */ | |
3006 | mips_expect_timeout (entry_address, tftp_in_use ? 15 : remote_timeout); | |
3007 | sprintf (hexnumber, "%x", final); | |
3008 | mips_expect (hexnumber); | |
3009 | mips_expect ("\r\n"); | |
3010 | } | |
3011 | ||
3012 | static int | |
3013 | pmon_check_total (int bintotal) | |
3014 | { | |
3015 | char hexnumber[9]; /* includes '\0' space */ | |
3016 | mips_expect ("\r\ntotal = 0x"); | |
3017 | sprintf (hexnumber, "%x", bintotal); | |
3018 | mips_expect (hexnumber); | |
3019 | return mips_expect_download (" bytes\r\n"); | |
3020 | } | |
3021 | ||
c906108c | 3022 | static void |
fba45db2 | 3023 | pmon_end_download (int final, int bintotal) |
c906108c | 3024 | { |
c5aa993b | 3025 | char hexnumber[9]; /* includes '\0' space */ |
c906108c SS |
3026 | |
3027 | if (tftp_in_use) | |
3028 | { | |
3029 | static char *load_cmd_prefix = "load -b -s "; | |
3030 | char *cmd; | |
3031 | struct stat stbuf; | |
3032 | ||
3033 | /* Close off the temporary file containing the load data. */ | |
3034 | fclose (tftp_file); | |
3035 | tftp_file = NULL; | |
3036 | ||
3037 | /* Make the temporary file readable by the world. */ | |
3038 | if (stat (tftp_localname, &stbuf) == 0) | |
3039 | chmod (tftp_localname, stbuf.st_mode | S_IROTH); | |
3040 | ||
3041 | /* Must reinitialize the board to prevent PMON from crashing. */ | |
3042 | mips_send_command ("initEther\r", -1); | |
3043 | ||
3044 | /* Send the load command. */ | |
3045 | cmd = xmalloc (strlen (load_cmd_prefix) + strlen (tftp_name) + 2); | |
3046 | strcpy (cmd, load_cmd_prefix); | |
3047 | strcat (cmd, tftp_name); | |
3048 | strcat (cmd, "\r"); | |
3049 | mips_send_command (cmd, 0); | |
b8c9b27d | 3050 | xfree (cmd); |
c906108c SS |
3051 | if (!mips_expect_download ("Downloading from ")) |
3052 | return; | |
3053 | if (!mips_expect_download (tftp_name)) | |
3054 | return; | |
3055 | if (!mips_expect_download (", ^C to abort\r\n")) | |
3056 | return; | |
3057 | } | |
3058 | ||
3059 | /* Wait for the stuff that PMON prints after the load has completed. | |
3060 | The timeout value for use in the tftp case (15 seconds) was picked | |
3061 | arbitrarily but might be too small for really large downloads. FIXME. */ | |
688991e6 | 3062 | switch (mips_monitor) |
c906108c | 3063 | { |
688991e6 AC |
3064 | case MON_LSI: |
3065 | pmon_check_ack ("termination"); | |
3066 | pmon_check_entry_address ("Entry address is ", final); | |
3067 | if (!pmon_check_total (bintotal)) | |
3068 | return; | |
3069 | break; | |
3070 | default: | |
3071 | pmon_check_entry_address ("Entry Address = ", final); | |
c906108c | 3072 | pmon_check_ack ("termination"); |
688991e6 AC |
3073 | if (!pmon_check_total (bintotal)) |
3074 | return; | |
3075 | break; | |
c906108c | 3076 | } |
c906108c SS |
3077 | |
3078 | if (tftp_in_use) | |
3079 | remove (tftp_localname); /* Remove temporary file */ | |
3080 | } | |
3081 | ||
3082 | static void | |
fba45db2 | 3083 | pmon_download (char *buffer, int length) |
c906108c SS |
3084 | { |
3085 | if (tftp_in_use) | |
3086 | fwrite (buffer, 1, length, tftp_file); | |
3087 | else | |
2cd58942 | 3088 | serial_write (udp_in_use ? udp_desc : mips_desc, buffer, length); |
c906108c SS |
3089 | } |
3090 | ||
3091 | static void | |
fba45db2 | 3092 | pmon_load_fast (char *file) |
c906108c SS |
3093 | { |
3094 | bfd *abfd; | |
3095 | asection *s; | |
3096 | unsigned char *binbuf; | |
3097 | char *buffer; | |
3098 | int reclen; | |
3099 | unsigned int csum = 0; | |
3100 | int hashmark = !tftp_in_use; | |
3101 | int bintotal = 0; | |
3102 | int final = 0; | |
3103 | int finished = 0; | |
3104 | ||
c5aa993b JM |
3105 | buffer = (char *) xmalloc (MAXRECSIZE + 1); |
3106 | binbuf = (unsigned char *) xmalloc (BINCHUNK); | |
c906108c | 3107 | |
c5aa993b | 3108 | abfd = bfd_openr (file, 0); |
c906108c | 3109 | if (!abfd) |
c5aa993b JM |
3110 | { |
3111 | printf_filtered ("Unable to open file %s\n", file); | |
3112 | return; | |
3113 | } | |
c906108c | 3114 | |
c5aa993b JM |
3115 | if (bfd_check_format (abfd, bfd_object) == 0) |
3116 | { | |
3117 | printf_filtered ("File is not an object file\n"); | |
3118 | return; | |
3119 | } | |
c906108c SS |
3120 | |
3121 | /* Setup the required download state: */ | |
3122 | mips_send_command ("set dlproto etxack\r", -1); | |
3123 | mips_send_command ("set dlecho off\r", -1); | |
3124 | /* NOTE: We get a "cannot set variable" message if the variable is | |
3125 | already defined to have the argument we give. The code doesn't | |
3126 | care, since it just scans to the next prompt anyway. */ | |
3127 | /* Start the download: */ | |
c5aa993b JM |
3128 | pmon_start_download (); |
3129 | ||
c906108c | 3130 | /* Zero the checksum */ |
c5aa993b JM |
3131 | sprintf (buffer, "/Kxx\n"); |
3132 | reclen = strlen (buffer); | |
c906108c | 3133 | pmon_download (buffer, reclen); |
c5aa993b | 3134 | finished = pmon_check_ack ("/Kxx"); |
c906108c SS |
3135 | |
3136 | for (s = abfd->sections; s && !finished; s = s->next) | |
c5aa993b JM |
3137 | if (s->flags & SEC_LOAD) /* only deal with loadable sections */ |
3138 | { | |
2c500098 AM |
3139 | bintotal += bfd_get_section_size (s); |
3140 | final = (s->vma + bfd_get_section_size (s)); | |
c5aa993b JM |
3141 | |
3142 | printf_filtered ("%s\t: 0x%4x .. 0x%4x ", s->name, (unsigned int) s->vma, | |
2c500098 | 3143 | (unsigned int) (s->vma + bfd_get_section_size (s))); |
c5aa993b JM |
3144 | gdb_flush (gdb_stdout); |
3145 | ||
3146 | /* Output the starting address */ | |
3147 | sprintf (buffer, "/A"); | |
3148 | reclen = pmon_makeb64 (s->vma, &buffer[2], 36, &csum); | |
3149 | buffer[2 + reclen] = '\n'; | |
3150 | buffer[3 + reclen] = '\0'; | |
3151 | reclen += 3; /* for the initial escape code and carriage return */ | |
3152 | pmon_download (buffer, reclen); | |
3153 | finished = pmon_check_ack ("/A"); | |
3154 | ||
3155 | if (!finished) | |
3156 | { | |
3157 | unsigned int binamount; | |
3158 | unsigned int zerofill = 0; | |
3159 | char *bp = buffer; | |
3160 | unsigned int i; | |
3161 | ||
3162 | reclen = 0; | |
3163 | ||
2c500098 AM |
3164 | for (i = 0; |
3165 | i < bfd_get_section_size (s) && !finished; | |
3166 | i += binamount) | |
c5aa993b JM |
3167 | { |
3168 | int binptr = 0; | |
3169 | ||
2c500098 | 3170 | binamount = min (BINCHUNK, bfd_get_section_size (s) - i); |
c5aa993b JM |
3171 | |
3172 | bfd_get_section_contents (abfd, s, binbuf, i, binamount); | |
3173 | ||
3174 | /* This keeps a rolling checksum, until we decide to output | |
3175 | the line: */ | |
3176 | for (; ((binamount - binptr) > 0);) | |
3177 | { | |
1fa79fac MS |
3178 | pmon_make_fastrec (&bp, binbuf, &binptr, binamount, |
3179 | &reclen, &csum, &zerofill); | |
c5aa993b JM |
3180 | if (reclen >= (MAXRECSIZE - CHECKSIZE)) |
3181 | { | |
3182 | reclen = pmon_checkset (reclen, &bp, &csum); | |
3183 | pmon_download (buffer, reclen); | |
3184 | finished = pmon_check_ack ("data record"); | |
3185 | if (finished) | |
3186 | { | |
3187 | zerofill = 0; /* do not transmit pending zerofills */ | |
3188 | break; | |
3189 | } | |
3190 | ||
9a4105ab AC |
3191 | if (deprecated_ui_load_progress_hook) |
3192 | deprecated_ui_load_progress_hook (s->name, i); | |
7829b833 | 3193 | |
c5aa993b JM |
3194 | if (hashmark) |
3195 | { | |
3196 | putchar_unfiltered ('#'); | |
3197 | gdb_flush (gdb_stdout); | |
3198 | } | |
3199 | ||
3200 | bp = buffer; | |
3201 | reclen = 0; /* buffer processed */ | |
3202 | } | |
3203 | } | |
3204 | } | |
3205 | ||
3206 | /* Ensure no out-standing zerofill requests: */ | |
3207 | if (zerofill != 0) | |
3208 | reclen = pmon_zeroset (reclen, &bp, &zerofill, &csum); | |
3209 | ||
3210 | /* and then flush the line: */ | |
3211 | if (reclen > 0) | |
3212 | { | |
3213 | reclen = pmon_checkset (reclen, &bp, &csum); | |
3214 | /* Currently pmon_checkset outputs the line terminator by | |
3215 | default, so we write out the buffer so far: */ | |
3216 | pmon_download (buffer, reclen); | |
3217 | finished = pmon_check_ack ("record remnant"); | |
3218 | } | |
3219 | } | |
3220 | ||
3221 | putchar_unfiltered ('\n'); | |
3222 | } | |
c906108c SS |
3223 | |
3224 | /* Terminate the transfer. We know that we have an empty output | |
3225 | buffer at this point. */ | |
c5aa993b | 3226 | sprintf (buffer, "/E/E\n"); /* include dummy padding characters */ |
c906108c SS |
3227 | reclen = strlen (buffer); |
3228 | pmon_download (buffer, reclen); | |
3229 | ||
c5aa993b JM |
3230 | if (finished) |
3231 | { /* Ignore the termination message: */ | |
2cd58942 | 3232 | serial_flush_input (udp_in_use ? udp_desc : mips_desc); |
c5aa993b JM |
3233 | } |
3234 | else | |
3235 | { /* Deal with termination message: */ | |
3236 | pmon_end_download (final, bintotal); | |
3237 | } | |
c906108c SS |
3238 | |
3239 | return; | |
3240 | } | |
3241 | ||
3242 | /* mips_load -- download a file. */ | |
3243 | ||
3244 | static void | |
fba45db2 | 3245 | mips_load (char *file, int from_tty) |
c906108c SS |
3246 | { |
3247 | /* Get the board out of remote debugging mode. */ | |
3248 | if (mips_exit_debug ()) | |
3249 | error ("mips_load: Couldn't get into monitor mode."); | |
3250 | ||
3251 | if (mips_monitor != MON_IDT) | |
c5aa993b | 3252 | pmon_load_fast (file); |
c906108c | 3253 | else |
c5aa993b | 3254 | mips_load_srec (file); |
c906108c SS |
3255 | |
3256 | mips_initialize (); | |
3257 | ||
3258 | /* Finally, make the PC point at the start address */ | |
3259 | if (mips_monitor != MON_IDT) | |
3260 | { | |
3261 | /* Work around problem where PMON monitor updates the PC after a load | |
c5aa993b JM |
3262 | to a different value than GDB thinks it has. The following ensures |
3263 | that the write_pc() WILL update the PC value: */ | |
8262ee23 | 3264 | deprecated_register_valid[PC_REGNUM] = 0; |
c906108c SS |
3265 | } |
3266 | if (exec_bfd) | |
3267 | write_pc (bfd_get_start_address (exec_bfd)); | |
3268 | ||
39f77062 | 3269 | inferior_ptid = null_ptid; /* No process now */ |
c906108c SS |
3270 | |
3271 | /* This is necessary because many things were based on the PC at the time that | |
3272 | we attached to the monitor, which is no longer valid now that we have loaded | |
3273 | new code (and just changed the PC). Another way to do this might be to call | |
3274 | normal_stop, except that the stack may not be valid, and things would get | |
3275 | horribly confused... */ | |
3276 | ||
3277 | clear_symtab_users (); | |
3278 | } | |
3279 | ||
3280 | ||
3281 | /* Pass the command argument as a packet to PMON verbatim. */ | |
3282 | ||
3283 | static void | |
fba45db2 | 3284 | pmon_command (char *args, int from_tty) |
c906108c SS |
3285 | { |
3286 | char buf[DATA_MAXLEN + 1]; | |
3287 | int rlen; | |
3288 | ||
3289 | sprintf (buf, "0x0 %s", args); | |
3290 | mips_send_packet (buf, 1); | |
3291 | printf_filtered ("Send packet: %s\n", buf); | |
3292 | ||
3293 | rlen = mips_receive_packet (buf, 1, mips_receive_wait); | |
3294 | buf[rlen] = '\0'; | |
3295 | printf_filtered ("Received packet: %s\n", buf); | |
3296 | } | |
3297 | \f | |
a78f21af AC |
3298 | extern initialize_file_ftype _initialize_remote_mips; /* -Wmissing-prototypes */ |
3299 | ||
c906108c | 3300 | void |
fba45db2 | 3301 | _initialize_remote_mips (void) |
c906108c SS |
3302 | { |
3303 | /* Initialize the fields in mips_ops that are common to all four targets. */ | |
3304 | mips_ops.to_longname = "Remote MIPS debugging over serial line"; | |
3305 | mips_ops.to_close = mips_close; | |
3306 | mips_ops.to_detach = mips_detach; | |
3307 | mips_ops.to_resume = mips_resume; | |
3308 | mips_ops.to_fetch_registers = mips_fetch_registers; | |
3309 | mips_ops.to_store_registers = mips_store_registers; | |
3310 | mips_ops.to_prepare_to_store = mips_prepare_to_store; | |
c8e73a31 | 3311 | mips_ops.deprecated_xfer_memory = mips_xfer_memory; |
c906108c SS |
3312 | mips_ops.to_files_info = mips_files_info; |
3313 | mips_ops.to_insert_breakpoint = mips_insert_breakpoint; | |
3314 | mips_ops.to_remove_breakpoint = mips_remove_breakpoint; | |
546143b6 AC |
3315 | mips_ops.to_insert_watchpoint = mips_insert_watchpoint; |
3316 | mips_ops.to_remove_watchpoint = mips_remove_watchpoint; | |
3317 | mips_ops.to_stopped_by_watchpoint = mips_stopped_by_watchpoint; | |
3318 | mips_ops.to_can_use_hw_breakpoint = mips_can_use_watchpoint; | |
c906108c SS |
3319 | mips_ops.to_kill = mips_kill; |
3320 | mips_ops.to_load = mips_load; | |
3321 | mips_ops.to_create_inferior = mips_create_inferior; | |
3322 | mips_ops.to_mourn_inferior = mips_mourn_inferior; | |
3323 | mips_ops.to_stratum = process_stratum; | |
3324 | mips_ops.to_has_all_memory = 1; | |
3325 | mips_ops.to_has_memory = 1; | |
3326 | mips_ops.to_has_stack = 1; | |
3327 | mips_ops.to_has_registers = 1; | |
3328 | mips_ops.to_has_execution = 1; | |
3329 | mips_ops.to_magic = OPS_MAGIC; | |
3330 | ||
3331 | /* Copy the common fields to all four target vectors. */ | |
3332 | pmon_ops = ddb_ops = lsi_ops = mips_ops; | |
3333 | ||
3334 | /* Initialize target-specific fields in the target vectors. */ | |
3335 | mips_ops.to_shortname = "mips"; | |
3336 | mips_ops.to_doc = "\ | |
3337 | Debug a board using the MIPS remote debugging protocol over a serial line.\n\ | |
3338 | The argument is the device it is connected to or, if it contains a colon,\n\ | |
3339 | HOST:PORT to access a board over a network"; | |
3340 | mips_ops.to_open = mips_open; | |
3341 | mips_ops.to_wait = mips_wait; | |
3342 | ||
3343 | pmon_ops.to_shortname = "pmon"; | |
c5aa993b | 3344 | pmon_ops.to_doc = "\ |
c906108c SS |
3345 | Debug a board using the PMON MIPS remote debugging protocol over a serial\n\ |
3346 | line. The argument is the device it is connected to or, if it contains a\n\ | |
3347 | colon, HOST:PORT to access a board over a network"; | |
3348 | pmon_ops.to_open = pmon_open; | |
3349 | pmon_ops.to_wait = mips_wait; | |
3350 | ||
3351 | ddb_ops.to_shortname = "ddb"; | |
3352 | ddb_ops.to_doc = "\ | |
3353 | Debug a board using the PMON MIPS remote debugging protocol over a serial\n\ | |
3354 | line. The first argument is the device it is connected to or, if it contains\n\ | |
3355 | a colon, HOST:PORT to access a board over a network. The optional second\n\ | |
3356 | parameter is the temporary file in the form HOST:FILENAME to be used for\n\ | |
3357 | TFTP downloads to the board. The optional third parameter is the local name\n\ | |
3358 | of the TFTP temporary file, if it differs from the filename seen by the board."; | |
3359 | ddb_ops.to_open = ddb_open; | |
3360 | ddb_ops.to_wait = mips_wait; | |
3361 | ||
3362 | lsi_ops.to_shortname = "lsi"; | |
3363 | lsi_ops.to_doc = pmon_ops.to_doc; | |
3364 | lsi_ops.to_open = lsi_open; | |
3365 | lsi_ops.to_wait = mips_wait; | |
3366 | ||
3367 | /* Add the targets. */ | |
3368 | add_target (&mips_ops); | |
3369 | add_target (&pmon_ops); | |
3370 | add_target (&ddb_ops); | |
3371 | add_target (&lsi_ops); | |
3372 | ||
cb1a6d5f AC |
3373 | deprecated_add_show_from_set |
3374 | (add_set_cmd ("timeout", no_class, var_zinteger, | |
3375 | (char *) &mips_receive_wait, | |
3376 | "Set timeout in seconds for remote MIPS serial I/O.", | |
3377 | &setlist), | |
3378 | &showlist); | |
3379 | ||
3380 | deprecated_add_show_from_set | |
3381 | (add_set_cmd ("retransmit-timeout", no_class, var_zinteger, | |
3382 | (char *) &mips_retransmit_wait, "\ | |
3383 | Set retransmit timeout in seconds for remote MIPS serial I/O.\n\ | |
c906108c SS |
3384 | This is the number of seconds to wait for an acknowledgement to a packet\n\ |
3385 | before resending the packet.", &setlist), | |
cb1a6d5f | 3386 | &showlist); |
c906108c | 3387 | |
cb1a6d5f AC |
3388 | deprecated_add_show_from_set |
3389 | (add_set_cmd ("syn-garbage-limit", no_class, var_zinteger, | |
3390 | (char *) &mips_syn_garbage, "\ | |
3391 | Set the maximum number of characters to ignore when scanning for a SYN.\n\ | |
c906108c | 3392 | This is the maximum number of characters GDB will ignore when trying to\n\ |
cb1a6d5f AC |
3393 | synchronize with the remote system. A value of -1 means that there is no\n\ |
3394 | limit. (Note that these characters are printed out even though they are\n\ | |
3395 | ignored.)", | |
3396 | &setlist), | |
3397 | &showlist); | |
c906108c | 3398 | |
cb1a6d5f | 3399 | deprecated_add_show_from_set |
c906108c SS |
3400 | (add_set_cmd ("monitor-prompt", class_obscure, var_string, |
3401 | (char *) &mips_monitor_prompt, | |
3402 | "Set the prompt that GDB expects from the monitor.", | |
3403 | &setlist), | |
3404 | &showlist); | |
3405 | ||
cb1a6d5f AC |
3406 | deprecated_add_show_from_set |
3407 | (add_set_cmd ("monitor-warnings", class_obscure, var_zinteger, | |
3408 | (char *) &monitor_warnings, | |
3409 | "Set printing of monitor warnings.\n" | |
3410 | "When enabled, monitor warnings about hardware breakpoints " | |
3411 | "will be displayed.", | |
3412 | &setlist), | |
3413 | &showlist); | |
c906108c SS |
3414 | |
3415 | add_com ("pmon <command>", class_obscure, pmon_command, | |
c5aa993b | 3416 | "Send a packet to PMON (must be in debug mode)."); |
4014092b | 3417 | |
cb1a6d5f AC |
3418 | deprecated_add_show_from_set |
3419 | (add_set_cmd ("mask-address", no_class, | |
3420 | var_boolean, &mask_address_p, "\ | |
3421 | Set zeroing of upper 32 bits of 64-bit addresses when talking to PMON targets.\n\ | |
4014092b | 3422 | Use \"on\" to enable the masking and \"off\" to disable it.\n", |
cb1a6d5f AC |
3423 | &setlist), |
3424 | &showlist); | |
c906108c | 3425 | } |