| 1 | /* Remote debugging interface for MIPS remote debugging protocol. |
| 2 | |
| 3 | Copyright (C) 1993-2016 Free Software Foundation, Inc. |
| 4 | |
| 5 | Contributed by Cygnus Support. Written by Ian Lance Taylor |
| 6 | <ian@cygnus.com>. |
| 7 | |
| 8 | This file is part of GDB. |
| 9 | |
| 10 | This program is free software; you can redistribute it and/or modify |
| 11 | it under the terms of the GNU General Public License as published by |
| 12 | the Free Software Foundation; either version 3 of the License, or |
| 13 | (at your option) any later version. |
| 14 | |
| 15 | This program is distributed in the hope that it will be useful, |
| 16 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | GNU General Public License for more details. |
| 19 | |
| 20 | You should have received a copy of the GNU General Public License |
| 21 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 22 | |
| 23 | #include "defs.h" |
| 24 | #include "inferior.h" |
| 25 | #include "infrun.h" |
| 26 | #include "bfd.h" |
| 27 | #include "symfile.h" |
| 28 | #include "gdbcmd.h" |
| 29 | #include "gdbcore.h" |
| 30 | #include "serial.h" |
| 31 | #include "target.h" |
| 32 | #include <sys/stat.h> |
| 33 | #include "gdb_usleep.h" |
| 34 | #include "regcache.h" |
| 35 | #include <ctype.h> |
| 36 | #include "mips-tdep.h" |
| 37 | #include "gdbthread.h" |
| 38 | #include "gdb_bfd.h" |
| 39 | \f |
| 40 | |
| 41 | /* Breakpoint types. Values 0, 1, and 2 must agree with the watch |
| 42 | types passed by breakpoint.c to target_insert_watchpoint. |
| 43 | Value 3 is our own invention, and is used for ordinary instruction |
| 44 | breakpoints. Value 4 is used to mark an unused watchpoint in tables. */ |
| 45 | enum break_type |
| 46 | { |
| 47 | BREAK_WRITE, /* 0 */ |
| 48 | BREAK_READ, /* 1 */ |
| 49 | BREAK_ACCESS, /* 2 */ |
| 50 | BREAK_FETCH, /* 3 */ |
| 51 | BREAK_UNUSED /* 4 */ |
| 52 | }; |
| 53 | |
| 54 | /* Prototypes for local functions. */ |
| 55 | |
| 56 | static int mips_readchar (int timeout); |
| 57 | |
| 58 | static int mips_receive_header (unsigned char *hdr, int *pgarbage, |
| 59 | int ch, int timeout); |
| 60 | |
| 61 | static int mips_receive_trailer (unsigned char *trlr, int *pgarbage, |
| 62 | int *pch, int timeout); |
| 63 | |
| 64 | static int mips_cksum (const unsigned char *hdr, |
| 65 | const char *data, int len); |
| 66 | |
| 67 | static void mips_send_packet (const char *s, int get_ack); |
| 68 | |
| 69 | static void mips_send_command (const char *cmd, int prompt); |
| 70 | |
| 71 | static int mips_receive_packet (char *buff, int throw_error, int timeout); |
| 72 | |
| 73 | static ULONGEST mips_request (int cmd, ULONGEST addr, ULONGEST data, |
| 74 | int *perr, int timeout, char *buff); |
| 75 | |
| 76 | static void mips_initialize (void); |
| 77 | |
| 78 | static void mips_close (struct target_ops *self); |
| 79 | |
| 80 | static int mips_map_regno (struct gdbarch *, int); |
| 81 | |
| 82 | static void mips_set_register (int regno, ULONGEST value); |
| 83 | |
| 84 | static void mips_prepare_to_store (struct target_ops *self, |
| 85 | struct regcache *regcache); |
| 86 | |
| 87 | static int mips_fetch_word (CORE_ADDR addr, unsigned int *valp); |
| 88 | |
| 89 | static int mips_store_word (CORE_ADDR addr, unsigned int value, |
| 90 | int *old_contents); |
| 91 | |
| 92 | static enum target_xfer_status mips_xfer_memory (gdb_byte *readbuf, |
| 93 | const gdb_byte *writebuf, |
| 94 | ULONGEST memaddr, |
| 95 | ULONGEST len, |
| 96 | ULONGEST *xfered_len); |
| 97 | |
| 98 | static void mips_files_info (struct target_ops *ignore); |
| 99 | |
| 100 | static void mips_mourn_inferior (struct target_ops *ops); |
| 101 | |
| 102 | static int pmon_makeb64 (unsigned long v, char *p, int n, unsigned int *chksum); |
| 103 | |
| 104 | static int pmon_zeroset (int recsize, char **buff, unsigned int *amount, |
| 105 | unsigned int *chksum); |
| 106 | |
| 107 | static int pmon_checkset (int recsize, char **buff, unsigned int *value); |
| 108 | |
| 109 | static void pmon_make_fastrec (char **outbuf, unsigned char *inbuf, |
| 110 | int *inptr, int inamount, int *recsize, |
| 111 | unsigned int *csum, unsigned int *zerofill); |
| 112 | |
| 113 | static int pmon_check_ack (char *mesg); |
| 114 | |
| 115 | static void pmon_start_download (void); |
| 116 | |
| 117 | static void pmon_end_download (int final, int bintotal); |
| 118 | |
| 119 | static void pmon_download (char *buffer, int length); |
| 120 | |
| 121 | static void mips_load (struct target_ops *self, const char *file, int from_tty); |
| 122 | |
| 123 | static int mips_make_srec (char *buffer, int type, CORE_ADDR memaddr, |
| 124 | unsigned char *myaddr, int len); |
| 125 | |
| 126 | static int mips_set_breakpoint (CORE_ADDR addr, int len, enum break_type type); |
| 127 | |
| 128 | static int mips_clear_breakpoint (CORE_ADDR addr, int len, |
| 129 | enum break_type type); |
| 130 | |
| 131 | static int mips_common_breakpoint (int set, CORE_ADDR addr, int len, |
| 132 | enum break_type type); |
| 133 | |
| 134 | /* Forward declarations. */ |
| 135 | extern struct target_ops mips_ops; |
| 136 | extern struct target_ops pmon_ops; |
| 137 | extern struct target_ops ddb_ops; |
| 138 | extern struct target_ops rockhopper_ops; |
| 139 | \f/* *INDENT-OFF* */ |
| 140 | /* The MIPS remote debugging interface is built on top of a simple |
| 141 | packet protocol. Each packet is organized as follows: |
| 142 | |
| 143 | SYN The first character is always a SYN (ASCII 026, or ^V). SYN |
| 144 | may not appear anywhere else in the packet. Any time a SYN is |
| 145 | seen, a new packet should be assumed to have begun. |
| 146 | |
| 147 | TYPE_LEN |
| 148 | This byte contains the upper five bits of the logical length |
| 149 | of the data section, plus a single bit indicating whether this |
| 150 | is a data packet or an acknowledgement. The documentation |
| 151 | indicates that this bit is 1 for a data packet, but the actual |
| 152 | board uses 1 for an acknowledgement. The value of the byte is |
| 153 | 0x40 + (ack ? 0x20 : 0) + (len >> 6) |
| 154 | (we always have 0 <= len < 1024). Acknowledgement packets do |
| 155 | not carry data, and must have a data length of 0. |
| 156 | |
| 157 | LEN1 This byte contains the lower six bits of the logical length of |
| 158 | the data section. The value is |
| 159 | 0x40 + (len & 0x3f) |
| 160 | |
| 161 | SEQ This byte contains the six bit sequence number of the packet. |
| 162 | The value is |
| 163 | 0x40 + seq |
| 164 | An acknowlegment packet contains the sequence number of the |
| 165 | packet being acknowledged plus 1 modulo 64. Data packets are |
| 166 | transmitted in sequence. There may only be one outstanding |
| 167 | unacknowledged data packet at a time. The sequence numbers |
| 168 | are independent in each direction. If an acknowledgement for |
| 169 | the previous packet is received (i.e., an acknowledgement with |
| 170 | the sequence number of the packet just sent) the packet just |
| 171 | sent should be retransmitted. If no acknowledgement is |
| 172 | received within a timeout period, the packet should be |
| 173 | retransmitted. This has an unfortunate failure condition on a |
| 174 | high-latency line, as a delayed acknowledgement may lead to an |
| 175 | endless series of duplicate packets. |
| 176 | |
| 177 | DATA The actual data bytes follow. The following characters are |
| 178 | escaped inline with DLE (ASCII 020, or ^P): |
| 179 | SYN (026) DLE S |
| 180 | DLE (020) DLE D |
| 181 | ^C (003) DLE C |
| 182 | ^S (023) DLE s |
| 183 | ^Q (021) DLE q |
| 184 | The additional DLE characters are not counted in the logical |
| 185 | length stored in the TYPE_LEN and LEN1 bytes. |
| 186 | |
| 187 | CSUM1 |
| 188 | CSUM2 |
| 189 | CSUM3 |
| 190 | These bytes contain an 18 bit checksum of the complete |
| 191 | contents of the packet excluding the SEQ byte and the |
| 192 | CSUM[123] bytes. The checksum is simply the twos complement |
| 193 | addition of all the bytes treated as unsigned characters. The |
| 194 | values of the checksum bytes are: |
| 195 | CSUM1: 0x40 + ((cksum >> 12) & 0x3f) |
| 196 | CSUM2: 0x40 + ((cksum >> 6) & 0x3f) |
| 197 | CSUM3: 0x40 + (cksum & 0x3f) |
| 198 | |
| 199 | It happens that the MIPS remote debugging protocol always |
| 200 | communicates with ASCII strings. Because of this, this |
| 201 | implementation doesn't bother to handle the DLE quoting mechanism, |
| 202 | since it will never be required. */ |
| 203 | /* *INDENT-ON* */ |
| 204 | |
| 205 | |
| 206 | /* The SYN character which starts each packet. */ |
| 207 | #define SYN '\026' |
| 208 | |
| 209 | /* The 0x40 used to offset each packet (this value ensures that all of |
| 210 | the header and trailer bytes, other than SYN, are printable ASCII |
| 211 | characters). */ |
| 212 | #define HDR_OFFSET 0x40 |
| 213 | |
| 214 | /* The indices of the bytes in the packet header. */ |
| 215 | #define HDR_INDX_SYN 0 |
| 216 | #define HDR_INDX_TYPE_LEN 1 |
| 217 | #define HDR_INDX_LEN1 2 |
| 218 | #define HDR_INDX_SEQ 3 |
| 219 | #define HDR_LENGTH 4 |
| 220 | |
| 221 | /* The data/ack bit in the TYPE_LEN header byte. */ |
| 222 | #define TYPE_LEN_DA_BIT 0x20 |
| 223 | #define TYPE_LEN_DATA 0 |
| 224 | #define TYPE_LEN_ACK TYPE_LEN_DA_BIT |
| 225 | |
| 226 | /* How to compute the header bytes. */ |
| 227 | #define HDR_SET_SYN(data, len, seq) (SYN) |
| 228 | #define HDR_SET_TYPE_LEN(data, len, seq) \ |
| 229 | (HDR_OFFSET \ |
| 230 | + ((data) ? TYPE_LEN_DATA : TYPE_LEN_ACK) \ |
| 231 | + (((len) >> 6) & 0x1f)) |
| 232 | #define HDR_SET_LEN1(data, len, seq) (HDR_OFFSET + ((len) & 0x3f)) |
| 233 | #define HDR_SET_SEQ(data, len, seq) (HDR_OFFSET + (seq)) |
| 234 | |
| 235 | /* Check that a header byte is reasonable. */ |
| 236 | #define HDR_CHECK(ch) (((ch) & HDR_OFFSET) == HDR_OFFSET) |
| 237 | |
| 238 | /* Get data from the header. These macros evaluate their argument |
| 239 | multiple times. */ |
| 240 | #define HDR_IS_DATA(hdr) \ |
| 241 | (((hdr)[HDR_INDX_TYPE_LEN] & TYPE_LEN_DA_BIT) == TYPE_LEN_DATA) |
| 242 | #define HDR_GET_LEN(hdr) \ |
| 243 | ((((hdr)[HDR_INDX_TYPE_LEN] & 0x1f) << 6) + (((hdr)[HDR_INDX_LEN1] & 0x3f))) |
| 244 | #define HDR_GET_SEQ(hdr) ((unsigned int)(hdr)[HDR_INDX_SEQ] & 0x3f) |
| 245 | |
| 246 | /* The maximum data length. */ |
| 247 | #define DATA_MAXLEN 1023 |
| 248 | |
| 249 | /* The trailer offset. */ |
| 250 | #define TRLR_OFFSET HDR_OFFSET |
| 251 | |
| 252 | /* The indices of the bytes in the packet trailer. */ |
| 253 | #define TRLR_INDX_CSUM1 0 |
| 254 | #define TRLR_INDX_CSUM2 1 |
| 255 | #define TRLR_INDX_CSUM3 2 |
| 256 | #define TRLR_LENGTH 3 |
| 257 | |
| 258 | /* How to compute the trailer bytes. */ |
| 259 | #define TRLR_SET_CSUM1(cksum) (TRLR_OFFSET + (((cksum) >> 12) & 0x3f)) |
| 260 | #define TRLR_SET_CSUM2(cksum) (TRLR_OFFSET + (((cksum) >> 6) & 0x3f)) |
| 261 | #define TRLR_SET_CSUM3(cksum) (TRLR_OFFSET + (((cksum) ) & 0x3f)) |
| 262 | |
| 263 | /* Check that a trailer byte is reasonable. */ |
| 264 | #define TRLR_CHECK(ch) (((ch) & TRLR_OFFSET) == TRLR_OFFSET) |
| 265 | |
| 266 | /* Get data from the trailer. This evaluates its argument multiple |
| 267 | times. */ |
| 268 | #define TRLR_GET_CKSUM(trlr) \ |
| 269 | ((((trlr)[TRLR_INDX_CSUM1] & 0x3f) << 12) \ |
| 270 | + (((trlr)[TRLR_INDX_CSUM2] & 0x3f) << 6) \ |
| 271 | + ((trlr)[TRLR_INDX_CSUM3] & 0x3f)) |
| 272 | |
| 273 | /* The sequence number modulos. */ |
| 274 | #define SEQ_MODULOS (64) |
| 275 | |
| 276 | /* PMON commands to load from the serial port or UDP socket. */ |
| 277 | #define LOAD_CMD "load -b -s tty0\r" |
| 278 | #define LOAD_CMD_UDP "load -b -s udp\r" |
| 279 | |
| 280 | /* The target vectors for the four different remote MIPS targets. |
| 281 | These are initialized with code in _initialize_remote_mips instead |
| 282 | of static initializers, to make it easier to extend the target_ops |
| 283 | vector later. */ |
| 284 | struct target_ops mips_ops, pmon_ops, ddb_ops, rockhopper_ops, lsi_ops; |
| 285 | |
| 286 | enum mips_monitor_type |
| 287 | { |
| 288 | /* IDT/SIM monitor being used: */ |
| 289 | MON_IDT, |
| 290 | /* PMON monitor being used: */ |
| 291 | MON_PMON, /* 3.0.83 [COGENT,EB,FP,NET] |
| 292 | Algorithmics Ltd. Nov 9 1995 17:19:50 */ |
| 293 | MON_DDB, /* 2.7.473 [DDBVR4300,EL,FP,NET] |
| 294 | Risq Modular Systems, |
| 295 | Thu Jun 6 09:28:40 PDT 1996 */ |
| 296 | MON_LSI, /* 4.3.12 [EB,FP], |
| 297 | LSI LOGIC Corp. Tue Feb 25 13:22:14 1997 */ |
| 298 | MON_ROCKHOPPER, |
| 299 | /* Last and unused value, for sizing vectors, etc. */ |
| 300 | MON_LAST |
| 301 | }; |
| 302 | static enum mips_monitor_type mips_monitor = MON_LAST; |
| 303 | |
| 304 | /* The monitor prompt text. If the user sets the PMON prompt |
| 305 | to some new value, the GDB `set monitor-prompt' command must also |
| 306 | be used to inform GDB about the expected prompt. Otherwise, GDB |
| 307 | will not be able to connect to PMON in mips_initialize(). |
| 308 | If the `set monitor-prompt' command is not used, the expected |
| 309 | default prompt will be set according the target: |
| 310 | target prompt |
| 311 | ----- ----- |
| 312 | pmon PMON> |
| 313 | ddb NEC010> |
| 314 | lsi PMON> |
| 315 | */ |
| 316 | static char *mips_monitor_prompt; |
| 317 | |
| 318 | /* Set to 1 if the target is open. */ |
| 319 | static int mips_is_open; |
| 320 | |
| 321 | /* Currently active target description (if mips_is_open == 1). */ |
| 322 | static struct target_ops *current_ops; |
| 323 | |
| 324 | /* Set to 1 while the connection is being initialized. */ |
| 325 | static int mips_initializing; |
| 326 | |
| 327 | /* Set to 1 while the connection is being brought down. */ |
| 328 | static int mips_exiting; |
| 329 | |
| 330 | /* The next sequence number to send. */ |
| 331 | static unsigned int mips_send_seq; |
| 332 | |
| 333 | /* The next sequence number we expect to receive. */ |
| 334 | static unsigned int mips_receive_seq; |
| 335 | |
| 336 | /* The time to wait before retransmitting a packet, in seconds. */ |
| 337 | static int mips_retransmit_wait = 3; |
| 338 | |
| 339 | /* The number of times to try retransmitting a packet before giving up. */ |
| 340 | static int mips_send_retries = 10; |
| 341 | |
| 342 | /* The number of garbage characters to accept when looking for an |
| 343 | SYN for the next packet. */ |
| 344 | static int mips_syn_garbage = 10; |
| 345 | |
| 346 | /* The time to wait for a packet, in seconds. */ |
| 347 | static int mips_receive_wait = 5; |
| 348 | |
| 349 | /* Set if we have sent a packet to the board but have not yet received |
| 350 | a reply. */ |
| 351 | static int mips_need_reply = 0; |
| 352 | |
| 353 | /* Handle used to access serial I/O stream. */ |
| 354 | static struct serial *mips_desc; |
| 355 | |
| 356 | /* UDP handle used to download files to target. */ |
| 357 | static struct serial *udp_desc; |
| 358 | static int udp_in_use; |
| 359 | |
| 360 | /* TFTP filename used to download files to DDB board, in the form |
| 361 | host:filename. */ |
| 362 | static char *tftp_name; /* host:filename */ |
| 363 | static char *tftp_localname; /* filename portion of above */ |
| 364 | static int tftp_in_use; |
| 365 | static FILE *tftp_file; |
| 366 | |
| 367 | /* Counts the number of times the user tried to interrupt the target (usually |
| 368 | via ^C. */ |
| 369 | static int interrupt_count; |
| 370 | |
| 371 | /* If non-zero, means that the target is running. */ |
| 372 | static int mips_wait_flag = 0; |
| 373 | |
| 374 | /* If non-zero, monitor supports breakpoint commands. */ |
| 375 | static int monitor_supports_breakpoints = 0; |
| 376 | |
| 377 | /* Data cache header. */ |
| 378 | |
| 379 | #if 0 /* not used (yet?) */ |
| 380 | static DCACHE *mips_dcache; |
| 381 | #endif |
| 382 | |
| 383 | /* Non-zero means that we've just hit a read or write watchpoint. */ |
| 384 | static int hit_watchpoint; |
| 385 | |
| 386 | /* Table of breakpoints/watchpoints (used only on LSI PMON target). |
| 387 | The table is indexed by a breakpoint number, which is an integer |
| 388 | from 0 to 255 returned by the LSI PMON when a breakpoint is set. */ |
| 389 | |
| 390 | #define MAX_LSI_BREAKPOINTS 256 |
| 391 | struct lsi_breakpoint_info |
| 392 | { |
| 393 | enum break_type type; /* type of breakpoint */ |
| 394 | CORE_ADDR addr; /* address of breakpoint */ |
| 395 | int len; /* length of region being watched */ |
| 396 | unsigned long value; /* value to watch */ |
| 397 | } |
| 398 | lsi_breakpoints[MAX_LSI_BREAKPOINTS]; |
| 399 | |
| 400 | /* Error/warning codes returned by LSI PMON for breakpoint commands. |
| 401 | Warning values may be ORed together; error values may not. */ |
| 402 | #define W_WARN 0x100 /* This bit is set if the error code |
| 403 | is a warning */ |
| 404 | #define W_MSK 0x101 /* warning: Range feature is supported |
| 405 | via mask */ |
| 406 | #define W_VAL 0x102 /* warning: Value check is not |
| 407 | supported in hardware */ |
| 408 | #define W_QAL 0x104 /* warning: Requested qualifiers are |
| 409 | not supported in hardware */ |
| 410 | |
| 411 | #define E_ERR 0x200 /* This bit is set if the error code |
| 412 | is an error */ |
| 413 | #define E_BPT 0x200 /* error: No such breakpoint number */ |
| 414 | #define E_RGE 0x201 /* error: Range is not supported */ |
| 415 | #define E_QAL 0x202 /* error: The requested qualifiers can |
| 416 | not be used */ |
| 417 | #define E_OUT 0x203 /* error: Out of hardware resources */ |
| 418 | #define E_NON 0x204 /* error: Hardware breakpoint not supported */ |
| 419 | |
| 420 | struct lsi_error |
| 421 | { |
| 422 | int code; /* error code */ |
| 423 | char *string; /* string associated with this code */ |
| 424 | }; |
| 425 | |
| 426 | struct lsi_error lsi_warning_table[] = |
| 427 | { |
| 428 | {W_MSK, "Range feature is supported via mask"}, |
| 429 | {W_VAL, "Value check is not supported in hardware"}, |
| 430 | {W_QAL, "Requested qualifiers are not supported in hardware"}, |
| 431 | {0, NULL} |
| 432 | }; |
| 433 | |
| 434 | struct lsi_error lsi_error_table[] = |
| 435 | { |
| 436 | {E_BPT, "No such breakpoint number"}, |
| 437 | {E_RGE, "Range is not supported"}, |
| 438 | {E_QAL, "The requested qualifiers can not be used"}, |
| 439 | {E_OUT, "Out of hardware resources"}, |
| 440 | {E_NON, "Hardware breakpoint not supported"}, |
| 441 | {0, NULL} |
| 442 | }; |
| 443 | |
| 444 | /* Set to 1 with the 'set monitor-warnings' command to enable printing |
| 445 | of warnings returned by PMON when hardware breakpoints are used. */ |
| 446 | static int monitor_warnings; |
| 447 | |
| 448 | /* This is the ptid we use while we're connected to the remote. Its |
| 449 | value is arbitrary, as the remote-mips target doesn't have a notion of |
| 450 | processes or threads, but we need something non-null to place in |
| 451 | inferior_ptid. */ |
| 452 | static ptid_t remote_mips_ptid; |
| 453 | |
| 454 | /* Close any ports which might be open. Reset certain globals indicating |
| 455 | the state of those ports. */ |
| 456 | |
| 457 | static void |
| 458 | close_ports (void) |
| 459 | { |
| 460 | mips_is_open = 0; |
| 461 | serial_close (mips_desc); |
| 462 | |
| 463 | if (udp_in_use) |
| 464 | { |
| 465 | serial_close (udp_desc); |
| 466 | udp_in_use = 0; |
| 467 | } |
| 468 | tftp_in_use = 0; |
| 469 | } |
| 470 | |
| 471 | /* Handle low-level error that we can't recover from. Note that just |
| 472 | error()ing out from target_wait or some such low-level place will cause |
| 473 | all hell to break loose--the rest of GDB will tend to get left in an |
| 474 | inconsistent state. */ |
| 475 | |
| 476 | static void ATTRIBUTE_NORETURN |
| 477 | mips_error (char *string,...) |
| 478 | { |
| 479 | va_list args; |
| 480 | char *fmt; |
| 481 | |
| 482 | target_terminal_ours (); |
| 483 | wrap_here (""); /* Force out any buffered output. */ |
| 484 | gdb_flush (gdb_stdout); |
| 485 | gdb_flush (gdb_stderr); |
| 486 | |
| 487 | /* Clean up in such a way that mips_close won't try to talk to the |
| 488 | board (it almost surely won't work since we weren't able to talk to |
| 489 | it). */ |
| 490 | close_ports (); |
| 491 | |
| 492 | if (!ptid_equal (inferior_ptid, null_ptid)) |
| 493 | target_mourn_inferior (); |
| 494 | |
| 495 | fmt = concat (_("Ending remote MIPS debugging: "), |
| 496 | string, (char *) NULL); |
| 497 | make_cleanup (xfree, fmt); |
| 498 | |
| 499 | va_start (args, string); |
| 500 | throw_verror (TARGET_CLOSE_ERROR, fmt, args); |
| 501 | va_end (args); |
| 502 | } |
| 503 | |
| 504 | /* putc_readable - print a character, displaying non-printable chars in |
| 505 | ^x notation or in hex. */ |
| 506 | |
| 507 | static void |
| 508 | fputc_readable (int ch, struct ui_file *file) |
| 509 | { |
| 510 | if (ch == '\n') |
| 511 | fputc_unfiltered ('\n', file); |
| 512 | else if (ch == '\r') |
| 513 | fprintf_unfiltered (file, "\\r"); |
| 514 | else if (ch < 0x20) /* ASCII control character */ |
| 515 | fprintf_unfiltered (file, "^%c", ch + '@'); |
| 516 | else if (ch >= 0x7f) /* non-ASCII characters (rubout or greater) */ |
| 517 | fprintf_unfiltered (file, "[%02x]", ch & 0xff); |
| 518 | else |
| 519 | fputc_unfiltered (ch, file); |
| 520 | } |
| 521 | |
| 522 | |
| 523 | /* puts_readable - print a string, displaying non-printable chars in |
| 524 | ^x notation or in hex. */ |
| 525 | |
| 526 | static void |
| 527 | fputs_readable (const char *string, struct ui_file *file) |
| 528 | { |
| 529 | int c; |
| 530 | |
| 531 | while ((c = *string++) != '\0') |
| 532 | fputc_readable (c, file); |
| 533 | } |
| 534 | |
| 535 | |
| 536 | /* Read P as a hex value. Return true if every character made sense, |
| 537 | storing the result in *RESULT. Leave *RESULT unchanged otherwise. */ |
| 538 | |
| 539 | static int |
| 540 | read_hex_value (const char *p, ULONGEST *result) |
| 541 | { |
| 542 | ULONGEST retval; |
| 543 | |
| 544 | retval = 0; |
| 545 | while (*p != 0) |
| 546 | { |
| 547 | retval <<= 4; |
| 548 | if (*p >= '0' && *p <= '9') |
| 549 | retval |= *p - '0'; |
| 550 | else if (*p >= 'A' && *p <= 'F') |
| 551 | retval |= *p - 'A' + 10; |
| 552 | else if (*p >= 'a' && *p <= 'f') |
| 553 | retval |= *p - 'a' + 10; |
| 554 | else |
| 555 | return 0; |
| 556 | p++; |
| 557 | } |
| 558 | *result = retval; |
| 559 | return 1; |
| 560 | } |
| 561 | |
| 562 | |
| 563 | /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if |
| 564 | timed out. TIMEOUT specifies timeout value in seconds. */ |
| 565 | |
| 566 | static int |
| 567 | mips_expect_timeout (const char *string, int timeout) |
| 568 | { |
| 569 | const char *p = string; |
| 570 | |
| 571 | if (remote_debug) |
| 572 | { |
| 573 | fprintf_unfiltered (gdb_stdlog, "Expected \""); |
| 574 | fputs_readable (string, gdb_stdlog); |
| 575 | fprintf_unfiltered (gdb_stdlog, "\", got \""); |
| 576 | } |
| 577 | |
| 578 | immediate_quit++; |
| 579 | QUIT; |
| 580 | while (1) |
| 581 | { |
| 582 | int c; |
| 583 | |
| 584 | /* Must use serial_readchar() here cuz mips_readchar would get |
| 585 | confused if we were waiting for the mips_monitor_prompt... */ |
| 586 | |
| 587 | c = serial_readchar (mips_desc, timeout); |
| 588 | |
| 589 | if (c == SERIAL_TIMEOUT) |
| 590 | { |
| 591 | if (remote_debug) |
| 592 | fprintf_unfiltered (gdb_stdlog, "\": FAIL\n"); |
| 593 | return 0; |
| 594 | } |
| 595 | |
| 596 | if (remote_debug) |
| 597 | fputc_readable (c, gdb_stdlog); |
| 598 | |
| 599 | if (c == *p++) |
| 600 | { |
| 601 | if (*p == '\0') |
| 602 | { |
| 603 | immediate_quit--; |
| 604 | if (remote_debug) |
| 605 | fprintf_unfiltered (gdb_stdlog, "\": OK\n"); |
| 606 | return 1; |
| 607 | } |
| 608 | } |
| 609 | else |
| 610 | { |
| 611 | p = string; |
| 612 | if (c == *p) |
| 613 | p++; |
| 614 | } |
| 615 | } |
| 616 | } |
| 617 | |
| 618 | /* Wait until STRING shows up in mips_desc. Returns 1 if successful, else 0 if |
| 619 | timed out. The timeout value is hard-coded to 2 seconds. Use |
| 620 | mips_expect_timeout if a different timeout value is needed. */ |
| 621 | |
| 622 | static int |
| 623 | mips_expect (const char *string) |
| 624 | { |
| 625 | return mips_expect_timeout (string, remote_timeout); |
| 626 | } |
| 627 | |
| 628 | /* Read a character from the remote, aborting on error. Returns |
| 629 | SERIAL_TIMEOUT on timeout (since that's what serial_readchar() |
| 630 | returns). FIXME: If we see the string mips_monitor_prompt from the |
| 631 | board, then we are debugging on the main console port, and we have |
| 632 | somehow dropped out of remote debugging mode. In this case, we |
| 633 | automatically go back in to remote debugging mode. This is a hack, |
| 634 | put in because I can't find any way for a program running on the |
| 635 | remote board to terminate without also ending remote debugging |
| 636 | mode. I assume users won't have any trouble with this; for one |
| 637 | thing, the IDT documentation generally assumes that the remote |
| 638 | debugging port is not the console port. This is, however, very |
| 639 | convenient for DejaGnu when you only have one connected serial |
| 640 | port. */ |
| 641 | |
| 642 | static int |
| 643 | mips_readchar (int timeout) |
| 644 | { |
| 645 | int ch; |
| 646 | static int state = 0; |
| 647 | int mips_monitor_prompt_len = strlen (mips_monitor_prompt); |
| 648 | |
| 649 | { /* FIXME this whole block is dead code! */ |
| 650 | int i; |
| 651 | |
| 652 | i = timeout; |
| 653 | if (i == -1 && watchdog > 0) |
| 654 | i = watchdog; |
| 655 | } |
| 656 | |
| 657 | if (state == mips_monitor_prompt_len) |
| 658 | timeout = 1; |
| 659 | ch = serial_readchar (mips_desc, timeout); |
| 660 | |
| 661 | if (ch == SERIAL_TIMEOUT && timeout == -1) /* Watchdog went off. */ |
| 662 | { |
| 663 | target_mourn_inferior (); |
| 664 | error (_("Watchdog has expired. Target detached.")); |
| 665 | } |
| 666 | |
| 667 | if (ch == SERIAL_EOF) |
| 668 | mips_error (_("End of file from remote")); |
| 669 | if (ch == SERIAL_ERROR) |
| 670 | mips_error (_("Error reading from remote: %s"), safe_strerror (errno)); |
| 671 | if (remote_debug > 1) |
| 672 | { |
| 673 | /* Don't use _filtered; we can't deal with a QUIT out of |
| 674 | target_wait, and I think this might be called from there. */ |
| 675 | if (ch != SERIAL_TIMEOUT) |
| 676 | fprintf_unfiltered (gdb_stdlog, "Read '%c' %d 0x%x\n", ch, ch, ch); |
| 677 | else |
| 678 | fprintf_unfiltered (gdb_stdlog, "Timed out in read\n"); |
| 679 | } |
| 680 | |
| 681 | /* If we have seen mips_monitor_prompt and we either time out, or |
| 682 | we see a @ (which was echoed from a packet we sent), reset the |
| 683 | board as described above. The first character in a packet after |
| 684 | the SYN (which is not echoed) is always an @ unless the packet is |
| 685 | more than 64 characters long, which ours never are. */ |
| 686 | if ((ch == SERIAL_TIMEOUT || ch == '@') |
| 687 | && state == mips_monitor_prompt_len |
| 688 | && !mips_initializing |
| 689 | && !mips_exiting) |
| 690 | { |
| 691 | if (remote_debug > 0) |
| 692 | /* Don't use _filtered; we can't deal with a QUIT out of |
| 693 | target_wait, and I think this might be called from there. */ |
| 694 | fprintf_unfiltered (gdb_stdlog, |
| 695 | "Reinitializing MIPS debugging mode\n"); |
| 696 | |
| 697 | mips_need_reply = 0; |
| 698 | mips_initialize (); |
| 699 | |
| 700 | state = 0; |
| 701 | |
| 702 | /* At this point, about the only thing we can do is abort the command |
| 703 | in progress and get back to command level as quickly as possible. */ |
| 704 | |
| 705 | error (_("Remote board reset, debug protocol re-initialized.")); |
| 706 | } |
| 707 | |
| 708 | if (ch == mips_monitor_prompt[state]) |
| 709 | ++state; |
| 710 | else |
| 711 | state = 0; |
| 712 | |
| 713 | return ch; |
| 714 | } |
| 715 | |
| 716 | /* Get a packet header, putting the data in the supplied buffer. |
| 717 | PGARBAGE is a pointer to the number of garbage characters received |
| 718 | so far. CH is the last character received. Returns 0 for success, |
| 719 | or -1 for timeout. */ |
| 720 | |
| 721 | static int |
| 722 | mips_receive_header (unsigned char *hdr, int *pgarbage, int ch, int timeout) |
| 723 | { |
| 724 | int i; |
| 725 | |
| 726 | while (1) |
| 727 | { |
| 728 | /* Wait for a SYN. mips_syn_garbage is intended to prevent |
| 729 | sitting here indefinitely if the board sends us one garbage |
| 730 | character per second. ch may already have a value from the |
| 731 | last time through the loop. */ |
| 732 | while (ch != SYN) |
| 733 | { |
| 734 | ch = mips_readchar (timeout); |
| 735 | if (ch == SERIAL_TIMEOUT) |
| 736 | return -1; |
| 737 | if (ch != SYN) |
| 738 | { |
| 739 | /* Printing the character here lets the user of gdb see |
| 740 | what the program is outputting, if the debugging is |
| 741 | being done on the console port. Don't use _filtered: |
| 742 | we can't deal with a QUIT out of target_wait and |
| 743 | buffered target output confuses the user. */ |
| 744 | if (!mips_initializing || remote_debug > 0) |
| 745 | { |
| 746 | if (isprint (ch) || isspace (ch)) |
| 747 | { |
| 748 | fputc_unfiltered (ch, gdb_stdtarg); |
| 749 | } |
| 750 | else |
| 751 | { |
| 752 | fputc_readable (ch, gdb_stdtarg); |
| 753 | } |
| 754 | gdb_flush (gdb_stdtarg); |
| 755 | } |
| 756 | |
| 757 | /* Only count unprintable characters. */ |
| 758 | if (! (isprint (ch) || isspace (ch))) |
| 759 | (*pgarbage) += 1; |
| 760 | |
| 761 | if (mips_syn_garbage > 0 |
| 762 | && *pgarbage > mips_syn_garbage) |
| 763 | mips_error (_("Debug protocol failure: more " |
| 764 | "than %d characters before a sync."), |
| 765 | mips_syn_garbage); |
| 766 | } |
| 767 | } |
| 768 | |
| 769 | /* Get the packet header following the SYN. */ |
| 770 | for (i = 1; i < HDR_LENGTH; i++) |
| 771 | { |
| 772 | ch = mips_readchar (timeout); |
| 773 | if (ch == SERIAL_TIMEOUT) |
| 774 | return -1; |
| 775 | /* Make sure this is a header byte. */ |
| 776 | if (ch == SYN || !HDR_CHECK (ch)) |
| 777 | break; |
| 778 | |
| 779 | hdr[i] = ch; |
| 780 | } |
| 781 | |
| 782 | /* If we got the complete header, we can return. Otherwise we |
| 783 | loop around and keep looking for SYN. */ |
| 784 | if (i >= HDR_LENGTH) |
| 785 | return 0; |
| 786 | } |
| 787 | } |
| 788 | |
| 789 | /* Get a packet header, putting the data in the supplied buffer. |
| 790 | PGARBAGE is a pointer to the number of garbage characters received |
| 791 | so far. The last character read is returned in *PCH. Returns 0 |
| 792 | for success, -1 for timeout, -2 for error. */ |
| 793 | |
| 794 | static int |
| 795 | mips_receive_trailer (unsigned char *trlr, int *pgarbage, |
| 796 | int *pch, int timeout) |
| 797 | { |
| 798 | int i; |
| 799 | int ch; |
| 800 | |
| 801 | for (i = 0; i < TRLR_LENGTH; i++) |
| 802 | { |
| 803 | ch = mips_readchar (timeout); |
| 804 | *pch = ch; |
| 805 | if (ch == SERIAL_TIMEOUT) |
| 806 | return -1; |
| 807 | if (!TRLR_CHECK (ch)) |
| 808 | return -2; |
| 809 | trlr[i] = ch; |
| 810 | } |
| 811 | return 0; |
| 812 | } |
| 813 | |
| 814 | /* Get the checksum of a packet. HDR points to the packet header. |
| 815 | DATASTR points to the packet data. LEN is the length of DATASTR. */ |
| 816 | |
| 817 | static int |
| 818 | mips_cksum (const unsigned char *hdr, const char *datastr, int len) |
| 819 | { |
| 820 | const unsigned char *p; |
| 821 | const unsigned char *data = (const unsigned char *) datastr; |
| 822 | int c; |
| 823 | int cksum; |
| 824 | |
| 825 | cksum = 0; |
| 826 | |
| 827 | /* The initial SYN is not included in the checksum. */ |
| 828 | c = HDR_LENGTH - 1; |
| 829 | p = hdr + 1; |
| 830 | while (c-- != 0) |
| 831 | cksum += *p++; |
| 832 | |
| 833 | c = len; |
| 834 | p = data; |
| 835 | while (c-- != 0) |
| 836 | cksum += *p++; |
| 837 | |
| 838 | return cksum; |
| 839 | } |
| 840 | |
| 841 | /* Send a packet containing the given ASCII string. */ |
| 842 | |
| 843 | static void |
| 844 | mips_send_packet (const char *s, int get_ack) |
| 845 | { |
| 846 | /* unsigned */ int len; |
| 847 | unsigned char *packet; |
| 848 | int cksum; |
| 849 | int attempt; |
| 850 | |
| 851 | len = strlen (s); |
| 852 | if (len > DATA_MAXLEN) |
| 853 | mips_error (_("MIPS protocol data packet too long: %s"), s); |
| 854 | |
| 855 | packet = (unsigned char *) alloca (HDR_LENGTH + len + TRLR_LENGTH + 1); |
| 856 | |
| 857 | packet[HDR_INDX_SYN] = HDR_SET_SYN (1, len, mips_send_seq); |
| 858 | packet[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (1, len, mips_send_seq); |
| 859 | packet[HDR_INDX_LEN1] = HDR_SET_LEN1 (1, len, mips_send_seq); |
| 860 | packet[HDR_INDX_SEQ] = HDR_SET_SEQ (1, len, mips_send_seq); |
| 861 | |
| 862 | memcpy (packet + HDR_LENGTH, s, len); |
| 863 | |
| 864 | cksum = mips_cksum (packet, (char *) packet + HDR_LENGTH, len); |
| 865 | packet[HDR_LENGTH + len + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum); |
| 866 | packet[HDR_LENGTH + len + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum); |
| 867 | packet[HDR_LENGTH + len + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum); |
| 868 | |
| 869 | /* Increment the sequence number. This will set mips_send_seq to |
| 870 | the sequence number we expect in the acknowledgement. */ |
| 871 | mips_send_seq = (mips_send_seq + 1) % SEQ_MODULOS; |
| 872 | |
| 873 | /* We can only have one outstanding data packet, so we just wait for |
| 874 | the acknowledgement here. Keep retransmitting the packet until |
| 875 | we get one, or until we've tried too many times. */ |
| 876 | for (attempt = 0; attempt < mips_send_retries; attempt++) |
| 877 | { |
| 878 | int garbage; |
| 879 | int ch; |
| 880 | |
| 881 | if (remote_debug > 0) |
| 882 | { |
| 883 | /* Don't use _filtered; we can't deal with a QUIT out of |
| 884 | target_wait, and I think this might be called from there. */ |
| 885 | packet[HDR_LENGTH + len + TRLR_LENGTH] = '\0'; |
| 886 | fprintf_unfiltered (gdb_stdlog, "Writing \"%s\"\n", packet + 1); |
| 887 | } |
| 888 | |
| 889 | if (serial_write (mips_desc, packet, |
| 890 | HDR_LENGTH + len + TRLR_LENGTH) != 0) |
| 891 | mips_error (_("write to target failed: %s"), safe_strerror (errno)); |
| 892 | |
| 893 | if (!get_ack) |
| 894 | return; |
| 895 | |
| 896 | garbage = 0; |
| 897 | ch = 0; |
| 898 | while (1) |
| 899 | { |
| 900 | unsigned char hdr[HDR_LENGTH + 1]; |
| 901 | unsigned char trlr[TRLR_LENGTH + 1]; |
| 902 | int err; |
| 903 | unsigned int seq; |
| 904 | |
| 905 | /* Get the packet header. If we time out, resend the data |
| 906 | packet. */ |
| 907 | err = mips_receive_header (hdr, &garbage, ch, mips_retransmit_wait); |
| 908 | if (err != 0) |
| 909 | break; |
| 910 | |
| 911 | ch = 0; |
| 912 | |
| 913 | /* If we get a data packet, assume it is a duplicate and |
| 914 | ignore it. FIXME: If the acknowledgement is lost, this |
| 915 | data packet may be the packet the remote sends after the |
| 916 | acknowledgement. */ |
| 917 | if (HDR_IS_DATA (hdr)) |
| 918 | { |
| 919 | int i; |
| 920 | |
| 921 | /* Ignore any errors raised whilst attempting to ignore |
| 922 | packet. */ |
| 923 | |
| 924 | len = HDR_GET_LEN (hdr); |
| 925 | |
| 926 | for (i = 0; i < len; i++) |
| 927 | { |
| 928 | int rch; |
| 929 | |
| 930 | rch = mips_readchar (remote_timeout); |
| 931 | if (rch == SYN) |
| 932 | { |
| 933 | ch = SYN; |
| 934 | break; |
| 935 | } |
| 936 | if (rch == SERIAL_TIMEOUT) |
| 937 | break; |
| 938 | /* Ignore the character. */ |
| 939 | } |
| 940 | |
| 941 | if (i == len) |
| 942 | (void) mips_receive_trailer (trlr, &garbage, &ch, |
| 943 | remote_timeout); |
| 944 | |
| 945 | /* We don't bother checking the checksum, or providing an |
| 946 | ACK to the packet. */ |
| 947 | continue; |
| 948 | } |
| 949 | |
| 950 | /* If the length is not 0, this is a garbled packet. */ |
| 951 | if (HDR_GET_LEN (hdr) != 0) |
| 952 | continue; |
| 953 | |
| 954 | /* Get the packet trailer. */ |
| 955 | err = mips_receive_trailer (trlr, &garbage, &ch, |
| 956 | mips_retransmit_wait); |
| 957 | |
| 958 | /* If we timed out, resend the data packet. */ |
| 959 | if (err == -1) |
| 960 | break; |
| 961 | |
| 962 | /* If we got a bad character, reread the header. */ |
| 963 | if (err != 0) |
| 964 | continue; |
| 965 | |
| 966 | /* If the checksum does not match the trailer checksum, this |
| 967 | is a bad packet; ignore it. */ |
| 968 | if (mips_cksum (hdr, NULL, 0) != TRLR_GET_CKSUM (trlr)) |
| 969 | continue; |
| 970 | |
| 971 | if (remote_debug > 0) |
| 972 | { |
| 973 | hdr[HDR_LENGTH] = '\0'; |
| 974 | trlr[TRLR_LENGTH] = '\0'; |
| 975 | /* Don't use _filtered; we can't deal with a QUIT out of |
| 976 | target_wait, and I think this might be called from there. */ |
| 977 | fprintf_unfiltered (gdb_stdlog, "Got ack %d \"%s%s\"\n", |
| 978 | HDR_GET_SEQ (hdr), hdr + 1, trlr); |
| 979 | } |
| 980 | |
| 981 | /* If this ack is for the current packet, we're done. */ |
| 982 | seq = HDR_GET_SEQ (hdr); |
| 983 | if (seq == mips_send_seq) |
| 984 | return; |
| 985 | |
| 986 | /* If this ack is for the last packet, resend the current |
| 987 | packet. */ |
| 988 | if ((seq + 1) % SEQ_MODULOS == mips_send_seq) |
| 989 | break; |
| 990 | |
| 991 | /* Otherwise this is a bad ack; ignore it. Increment the |
| 992 | garbage count to ensure that we do not stay in this loop |
| 993 | forever. */ |
| 994 | ++garbage; |
| 995 | } |
| 996 | } |
| 997 | |
| 998 | mips_error (_("Remote did not acknowledge packet")); |
| 999 | } |
| 1000 | |
| 1001 | /* Receive and acknowledge a packet, returning the data in BUFF (which |
| 1002 | should be DATA_MAXLEN + 1 bytes). The protocol documentation |
| 1003 | implies that only the sender retransmits packets, so this code just |
| 1004 | waits silently for a packet. It returns the length of the received |
| 1005 | packet. If THROW_ERROR is nonzero, call error() on errors. If not, |
| 1006 | don't print an error message and return -1. */ |
| 1007 | |
| 1008 | static int |
| 1009 | mips_receive_packet (char *buff, int throw_error, int timeout) |
| 1010 | { |
| 1011 | int ch; |
| 1012 | int garbage; |
| 1013 | int len; |
| 1014 | unsigned char ack[HDR_LENGTH + TRLR_LENGTH + 1]; |
| 1015 | int cksum; |
| 1016 | |
| 1017 | ch = 0; |
| 1018 | garbage = 0; |
| 1019 | while (1) |
| 1020 | { |
| 1021 | unsigned char hdr[HDR_LENGTH]; |
| 1022 | unsigned char trlr[TRLR_LENGTH]; |
| 1023 | int i; |
| 1024 | int err; |
| 1025 | |
| 1026 | if (mips_receive_header (hdr, &garbage, ch, timeout) != 0) |
| 1027 | { |
| 1028 | if (throw_error) |
| 1029 | mips_error (_("Timed out waiting for remote packet")); |
| 1030 | else |
| 1031 | return -1; |
| 1032 | } |
| 1033 | |
| 1034 | ch = 0; |
| 1035 | |
| 1036 | /* An acknowledgement is probably a duplicate; ignore it. */ |
| 1037 | if (!HDR_IS_DATA (hdr)) |
| 1038 | { |
| 1039 | len = HDR_GET_LEN (hdr); |
| 1040 | /* Check if the length is valid for an ACK, we may aswell |
| 1041 | try and read the remainder of the packet: */ |
| 1042 | if (len == 0) |
| 1043 | { |
| 1044 | /* Ignore the error condition, since we are going to |
| 1045 | ignore the packet anyway. */ |
| 1046 | (void) mips_receive_trailer (trlr, &garbage, &ch, timeout); |
| 1047 | } |
| 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) |
| 1051 | fprintf_unfiltered (gdb_stdlog, "Ignoring unexpected ACK\n"); |
| 1052 | continue; |
| 1053 | } |
| 1054 | |
| 1055 | len = HDR_GET_LEN (hdr); |
| 1056 | for (i = 0; i < len; i++) |
| 1057 | { |
| 1058 | int rch; |
| 1059 | |
| 1060 | rch = mips_readchar (timeout); |
| 1061 | if (rch == SYN) |
| 1062 | { |
| 1063 | ch = SYN; |
| 1064 | break; |
| 1065 | } |
| 1066 | if (rch == SERIAL_TIMEOUT) |
| 1067 | { |
| 1068 | if (throw_error) |
| 1069 | mips_error (_("Timed out waiting for remote packet")); |
| 1070 | else |
| 1071 | return -1; |
| 1072 | } |
| 1073 | buff[i] = rch; |
| 1074 | } |
| 1075 | |
| 1076 | if (i < len) |
| 1077 | { |
| 1078 | /* Don't use _filtered; we can't deal with a QUIT out of |
| 1079 | target_wait, and I think this might be called from there. */ |
| 1080 | if (remote_debug > 0) |
| 1081 | fprintf_unfiltered (gdb_stdlog, |
| 1082 | "Got new SYN after %d chars (wanted %d)\n", |
| 1083 | i, len); |
| 1084 | continue; |
| 1085 | } |
| 1086 | |
| 1087 | err = mips_receive_trailer (trlr, &garbage, &ch, timeout); |
| 1088 | if (err == -1) |
| 1089 | { |
| 1090 | if (throw_error) |
| 1091 | mips_error (_("Timed out waiting for packet")); |
| 1092 | else |
| 1093 | return -1; |
| 1094 | } |
| 1095 | if (err == -2) |
| 1096 | { |
| 1097 | /* Don't use _filtered; we can't deal with a QUIT out of |
| 1098 | target_wait, and I think this might be called from there. */ |
| 1099 | if (remote_debug > 0) |
| 1100 | fprintf_unfiltered (gdb_stdlog, "Got SYN when wanted trailer\n"); |
| 1101 | continue; |
| 1102 | } |
| 1103 | |
| 1104 | /* If this is the wrong sequence number, ignore it. */ |
| 1105 | if (HDR_GET_SEQ (hdr) != mips_receive_seq) |
| 1106 | { |
| 1107 | /* Don't use _filtered; we can't deal with a QUIT out of |
| 1108 | target_wait, and I think this might be called from there. */ |
| 1109 | if (remote_debug > 0) |
| 1110 | fprintf_unfiltered (gdb_stdlog, |
| 1111 | "Ignoring sequence number %d (want %d)\n", |
| 1112 | HDR_GET_SEQ (hdr), mips_receive_seq); |
| 1113 | continue; |
| 1114 | } |
| 1115 | |
| 1116 | if (mips_cksum (hdr, buff, len) == TRLR_GET_CKSUM (trlr)) |
| 1117 | break; |
| 1118 | |
| 1119 | if (remote_debug > 0) |
| 1120 | /* Don't use _filtered; we can't deal with a QUIT out of |
| 1121 | target_wait, and I think this might be called from there. */ |
| 1122 | printf_unfiltered ("Bad checksum; data %d, trailer %d\n", |
| 1123 | mips_cksum (hdr, buff, len), |
| 1124 | TRLR_GET_CKSUM (trlr)); |
| 1125 | |
| 1126 | /* The checksum failed. Send an acknowledgement for the |
| 1127 | previous packet to tell the remote to resend the packet. */ |
| 1128 | ack[HDR_INDX_SYN] = HDR_SET_SYN (0, 0, mips_receive_seq); |
| 1129 | ack[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq); |
| 1130 | ack[HDR_INDX_LEN1] = HDR_SET_LEN1 (0, 0, mips_receive_seq); |
| 1131 | ack[HDR_INDX_SEQ] = HDR_SET_SEQ (0, 0, mips_receive_seq); |
| 1132 | |
| 1133 | cksum = mips_cksum (ack, NULL, 0); |
| 1134 | |
| 1135 | ack[HDR_LENGTH + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum); |
| 1136 | ack[HDR_LENGTH + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum); |
| 1137 | ack[HDR_LENGTH + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum); |
| 1138 | |
| 1139 | if (remote_debug > 0) |
| 1140 | { |
| 1141 | ack[HDR_LENGTH + TRLR_LENGTH] = '\0'; |
| 1142 | /* Don't use _filtered; we can't deal with a QUIT out of |
| 1143 | target_wait, and I think this might be called from there. */ |
| 1144 | printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq, |
| 1145 | ack + 1); |
| 1146 | } |
| 1147 | |
| 1148 | if (serial_write (mips_desc, ack, HDR_LENGTH + TRLR_LENGTH) != 0) |
| 1149 | { |
| 1150 | if (throw_error) |
| 1151 | mips_error (_("write to target failed: %s"), |
| 1152 | safe_strerror (errno)); |
| 1153 | else |
| 1154 | return -1; |
| 1155 | } |
| 1156 | } |
| 1157 | |
| 1158 | if (remote_debug > 0) |
| 1159 | { |
| 1160 | buff[len] = '\0'; |
| 1161 | /* Don't use _filtered; we can't deal with a QUIT out of |
| 1162 | target_wait, and I think this might be called from there. */ |
| 1163 | printf_unfiltered ("Got packet \"%s\"\n", buff); |
| 1164 | } |
| 1165 | |
| 1166 | /* We got the packet. Send an acknowledgement. */ |
| 1167 | mips_receive_seq = (mips_receive_seq + 1) % SEQ_MODULOS; |
| 1168 | |
| 1169 | ack[HDR_INDX_SYN] = HDR_SET_SYN (0, 0, mips_receive_seq); |
| 1170 | ack[HDR_INDX_TYPE_LEN] = HDR_SET_TYPE_LEN (0, 0, mips_receive_seq); |
| 1171 | ack[HDR_INDX_LEN1] = HDR_SET_LEN1 (0, 0, mips_receive_seq); |
| 1172 | ack[HDR_INDX_SEQ] = HDR_SET_SEQ (0, 0, mips_receive_seq); |
| 1173 | |
| 1174 | cksum = mips_cksum (ack, NULL, 0); |
| 1175 | |
| 1176 | ack[HDR_LENGTH + TRLR_INDX_CSUM1] = TRLR_SET_CSUM1 (cksum); |
| 1177 | ack[HDR_LENGTH + TRLR_INDX_CSUM2] = TRLR_SET_CSUM2 (cksum); |
| 1178 | ack[HDR_LENGTH + TRLR_INDX_CSUM3] = TRLR_SET_CSUM3 (cksum); |
| 1179 | |
| 1180 | if (remote_debug > 0) |
| 1181 | { |
| 1182 | ack[HDR_LENGTH + TRLR_LENGTH] = '\0'; |
| 1183 | /* Don't use _filtered; we can't deal with a QUIT out of |
| 1184 | target_wait, and I think this might be called from there. */ |
| 1185 | printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq, |
| 1186 | ack + 1); |
| 1187 | } |
| 1188 | |
| 1189 | if (serial_write (mips_desc, ack, HDR_LENGTH + TRLR_LENGTH) != 0) |
| 1190 | { |
| 1191 | if (throw_error) |
| 1192 | mips_error (_("write to target failed: %s"), safe_strerror (errno)); |
| 1193 | else |
| 1194 | return -1; |
| 1195 | } |
| 1196 | |
| 1197 | return len; |
| 1198 | } |
| 1199 | \f |
| 1200 | /* Optionally send a request to the remote system and optionally wait |
| 1201 | for the reply. This implements the remote debugging protocol, |
| 1202 | which is built on top of the packet protocol defined above. Each |
| 1203 | request has an ADDR argument and a DATA argument. The following |
| 1204 | requests are defined: |
| 1205 | |
| 1206 | \0 don't send a request; just wait for a reply |
| 1207 | i read word from instruction space at ADDR |
| 1208 | d read word from data space at ADDR |
| 1209 | I write DATA to instruction space at ADDR |
| 1210 | D write DATA to data space at ADDR |
| 1211 | r read register number ADDR |
| 1212 | R set register number ADDR to value DATA |
| 1213 | c continue execution (if ADDR != 1, set pc to ADDR) |
| 1214 | s single step (if ADDR != 1, set pc to ADDR) |
| 1215 | |
| 1216 | The read requests return the value requested. The write requests |
| 1217 | return the previous value in the changed location. The execution |
| 1218 | requests return a UNIX wait value (the approximate signal which |
| 1219 | caused execution to stop is in the upper eight bits). |
| 1220 | |
| 1221 | If PERR is not NULL, this function waits for a reply. If an error |
| 1222 | occurs, it sets *PERR to 1 and sets errno according to what the |
| 1223 | target board reports. */ |
| 1224 | |
| 1225 | static ULONGEST |
| 1226 | mips_request (int cmd, |
| 1227 | ULONGEST addr, |
| 1228 | ULONGEST data, |
| 1229 | int *perr, |
| 1230 | int timeout, |
| 1231 | char *buff) |
| 1232 | { |
| 1233 | int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8; |
| 1234 | char myBuff[DATA_MAXLEN + 1]; |
| 1235 | char response_string[17]; |
| 1236 | int len; |
| 1237 | int rpid; |
| 1238 | char rcmd; |
| 1239 | int rerrflg; |
| 1240 | ULONGEST rresponse; |
| 1241 | |
| 1242 | if (buff == (char *) NULL) |
| 1243 | buff = myBuff; |
| 1244 | |
| 1245 | if (cmd != '\0') |
| 1246 | { |
| 1247 | if (mips_need_reply) |
| 1248 | internal_error (__FILE__, __LINE__, |
| 1249 | _("mips_request: Trying to send " |
| 1250 | "command before reply")); |
| 1251 | /* 'T' sets a register to a 64-bit value, so make sure we use |
| 1252 | the right conversion function. */ |
| 1253 | if (cmd == 'T') |
| 1254 | sprintf (buff, "0x0 %c 0x%s 0x%s", cmd, |
| 1255 | phex_nz (addr, addr_size), phex_nz (data, 8)); |
| 1256 | else |
| 1257 | sprintf (buff, "0x0 %c 0x%s 0x%s", cmd, |
| 1258 | phex_nz (addr, addr_size), phex_nz (data, addr_size)); |
| 1259 | |
| 1260 | mips_send_packet (buff, 1); |
| 1261 | mips_need_reply = 1; |
| 1262 | } |
| 1263 | |
| 1264 | if (perr == (int *) NULL) |
| 1265 | return 0; |
| 1266 | |
| 1267 | if (!mips_need_reply) |
| 1268 | internal_error (__FILE__, __LINE__, |
| 1269 | _("mips_request: Trying to get reply before command")); |
| 1270 | |
| 1271 | mips_need_reply = 0; |
| 1272 | |
| 1273 | len = mips_receive_packet (buff, 1, timeout); |
| 1274 | buff[len] = '\0'; |
| 1275 | |
| 1276 | if (sscanf (buff, "0x%x %c 0x%x 0x%16s", |
| 1277 | &rpid, &rcmd, &rerrflg, response_string) != 4 |
| 1278 | || !read_hex_value (response_string, &rresponse) |
| 1279 | || (cmd != '\0' && rcmd != cmd)) |
| 1280 | mips_error (_("Bad response from remote board")); |
| 1281 | |
| 1282 | if (rerrflg != 0) |
| 1283 | { |
| 1284 | *perr = 1; |
| 1285 | |
| 1286 | /* FIXME: This will returns MIPS errno numbers, which may or may |
| 1287 | not be the same as errno values used on other systems. If |
| 1288 | they stick to common errno values, they will be the same, but |
| 1289 | if they don't, they must be translated. */ |
| 1290 | errno = rresponse; |
| 1291 | |
| 1292 | return 0; |
| 1293 | } |
| 1294 | |
| 1295 | *perr = 0; |
| 1296 | return rresponse; |
| 1297 | } |
| 1298 | |
| 1299 | /* Cleanup associated with mips_initialize(). */ |
| 1300 | |
| 1301 | static void |
| 1302 | mips_initialize_cleanups (void *arg) |
| 1303 | { |
| 1304 | mips_initializing = 0; |
| 1305 | } |
| 1306 | |
| 1307 | /* Cleanup associated with mips_exit_debug(). */ |
| 1308 | |
| 1309 | static void |
| 1310 | mips_exit_cleanups (void *arg) |
| 1311 | { |
| 1312 | mips_exiting = 0; |
| 1313 | } |
| 1314 | |
| 1315 | /* Send a command and wait for that command to be echoed back. Wait, |
| 1316 | too, for the following prompt. */ |
| 1317 | |
| 1318 | static void |
| 1319 | mips_send_command (const char *cmd, int prompt) |
| 1320 | { |
| 1321 | serial_write (mips_desc, cmd, strlen (cmd)); |
| 1322 | mips_expect (cmd); |
| 1323 | mips_expect ("\n"); |
| 1324 | if (prompt) |
| 1325 | mips_expect (mips_monitor_prompt); |
| 1326 | } |
| 1327 | |
| 1328 | /* Enter remote (dbx) debug mode: */ |
| 1329 | |
| 1330 | static void |
| 1331 | mips_enter_debug (void) |
| 1332 | { |
| 1333 | /* Reset the sequence numbers, ready for the new debug sequence: */ |
| 1334 | mips_send_seq = 0; |
| 1335 | mips_receive_seq = 0; |
| 1336 | |
| 1337 | if (mips_monitor != MON_IDT) |
| 1338 | mips_send_command ("debug\r", 0); |
| 1339 | else /* Assume IDT monitor by default. */ |
| 1340 | mips_send_command ("db tty0\r", 0); |
| 1341 | |
| 1342 | gdb_usleep (1000000); |
| 1343 | serial_write (mips_desc, "\r", sizeof "\r" - 1); |
| 1344 | |
| 1345 | /* We don't need to absorb any spurious characters here, since the |
| 1346 | mips_receive_header will eat up a reasonable number of characters |
| 1347 | whilst looking for the SYN, however this avoids the "garbage" |
| 1348 | being displayed to the user. */ |
| 1349 | if (mips_monitor != MON_IDT) |
| 1350 | mips_expect ("\r"); |
| 1351 | |
| 1352 | { |
| 1353 | char buff[DATA_MAXLEN + 1]; |
| 1354 | |
| 1355 | if (mips_receive_packet (buff, 1, 3) < 0) |
| 1356 | mips_error (_("Failed to initialize (didn't receive packet).")); |
| 1357 | } |
| 1358 | } |
| 1359 | |
| 1360 | /* Exit remote (dbx) debug mode, returning to the monitor prompt: */ |
| 1361 | |
| 1362 | static int |
| 1363 | mips_exit_debug (void) |
| 1364 | { |
| 1365 | int err; |
| 1366 | struct cleanup *old_cleanups = make_cleanup (mips_exit_cleanups, NULL); |
| 1367 | |
| 1368 | mips_exiting = 1; |
| 1369 | |
| 1370 | if (mips_monitor != MON_IDT && mips_monitor != MON_ROCKHOPPER) |
| 1371 | { |
| 1372 | /* The DDB (NEC) and MiniRISC (LSI) versions of PMON exit immediately, |
| 1373 | so we do not get a reply to this command: */ |
| 1374 | mips_request ('x', 0, 0, NULL, mips_receive_wait, NULL); |
| 1375 | mips_need_reply = 0; |
| 1376 | if (!mips_expect (" break!")) |
| 1377 | { |
| 1378 | do_cleanups (old_cleanups); |
| 1379 | return -1; |
| 1380 | } |
| 1381 | } |
| 1382 | else |
| 1383 | mips_request ('x', 0, 0, &err, mips_receive_wait, NULL); |
| 1384 | |
| 1385 | if (!mips_expect (mips_monitor_prompt)) |
| 1386 | { |
| 1387 | do_cleanups (old_cleanups); |
| 1388 | return -1; |
| 1389 | } |
| 1390 | |
| 1391 | do_cleanups (old_cleanups); |
| 1392 | |
| 1393 | return 0; |
| 1394 | } |
| 1395 | |
| 1396 | /* Initialize a new connection to the MIPS board, and make sure we are |
| 1397 | really connected. */ |
| 1398 | |
| 1399 | static void |
| 1400 | mips_initialize (void) |
| 1401 | { |
| 1402 | int err; |
| 1403 | struct cleanup *old_cleanups; |
| 1404 | int j; |
| 1405 | |
| 1406 | /* What is this code doing here? I don't see any way it can happen, and |
| 1407 | it might mean mips_initializing didn't get cleared properly. |
| 1408 | So I'll make it a warning. */ |
| 1409 | |
| 1410 | if (mips_initializing) |
| 1411 | { |
| 1412 | warning (_("internal error: mips_initialize called twice")); |
| 1413 | return; |
| 1414 | } |
| 1415 | |
| 1416 | old_cleanups = make_cleanup (mips_initialize_cleanups, NULL); |
| 1417 | |
| 1418 | mips_wait_flag = 0; |
| 1419 | mips_initializing = 1; |
| 1420 | |
| 1421 | /* At this point, the packit protocol isn't responding. We'll try getting |
| 1422 | into the monitor, and restarting the protocol. */ |
| 1423 | |
| 1424 | /* Force the system into the monitor. After this we *should* be at |
| 1425 | the mips_monitor_prompt. */ |
| 1426 | if (mips_monitor != MON_IDT) |
| 1427 | j = 0; /* Start by checking if we are already |
| 1428 | at the prompt. */ |
| 1429 | else |
| 1430 | j = 1; /* Start by sending a break. */ |
| 1431 | for (; j <= 4; j++) |
| 1432 | { |
| 1433 | switch (j) |
| 1434 | { |
| 1435 | case 0: /* First, try sending a CR. */ |
| 1436 | serial_flush_input (mips_desc); |
| 1437 | serial_write (mips_desc, "\r", 1); |
| 1438 | break; |
| 1439 | case 1: /* First, try sending a break. */ |
| 1440 | serial_send_break (mips_desc); |
| 1441 | break; |
| 1442 | case 2: /* Then, try a ^C. */ |
| 1443 | serial_write (mips_desc, "\003", 1); |
| 1444 | break; |
| 1445 | case 3: /* Then, try escaping from download. */ |
| 1446 | { |
| 1447 | if (mips_monitor != MON_IDT) |
| 1448 | { |
| 1449 | char tbuff[7]; |
| 1450 | |
| 1451 | /* We shouldn't need to send multiple termination |
| 1452 | sequences, since the target performs line (or |
| 1453 | block) reads, and then processes those |
| 1454 | packets. In-case we were downloading a large packet |
| 1455 | we flush the output buffer before inserting a |
| 1456 | termination sequence. */ |
| 1457 | serial_flush_output (mips_desc); |
| 1458 | sprintf (tbuff, "\r/E/E\r"); |
| 1459 | serial_write (mips_desc, tbuff, 6); |
| 1460 | } |
| 1461 | else |
| 1462 | { |
| 1463 | char srec[10]; |
| 1464 | int i; |
| 1465 | |
| 1466 | /* We are possibly in binary download mode, having |
| 1467 | aborted in the middle of an S-record. ^C won't |
| 1468 | work because of binary mode. The only reliable way |
| 1469 | out is to send enough termination packets (8 bytes) |
| 1470 | to fill up and then overflow the largest size |
| 1471 | S-record (255 bytes in this case). This amounts to |
| 1472 | 256/8 + 1 packets. */ |
| 1473 | |
| 1474 | mips_make_srec (srec, '7', 0, NULL, 0); |
| 1475 | |
| 1476 | for (i = 1; i <= 33; i++) |
| 1477 | { |
| 1478 | serial_write (mips_desc, srec, 8); |
| 1479 | |
| 1480 | if (serial_readchar (mips_desc, 0) >= 0) |
| 1481 | break; /* Break immediatly if we get something from |
| 1482 | the board. */ |
| 1483 | } |
| 1484 | } |
| 1485 | } |
| 1486 | break; |
| 1487 | case 4: |
| 1488 | mips_error (_("Failed to initialize.")); |
| 1489 | } |
| 1490 | |
| 1491 | if (mips_expect (mips_monitor_prompt)) |
| 1492 | break; |
| 1493 | } |
| 1494 | |
| 1495 | if (mips_monitor != MON_IDT) |
| 1496 | { |
| 1497 | /* Sometimes PMON ignores the first few characters in the first |
| 1498 | command sent after a load. Sending a blank command gets |
| 1499 | around that. */ |
| 1500 | mips_send_command ("\r", -1); |
| 1501 | |
| 1502 | /* Ensure the correct target state: */ |
| 1503 | if (mips_monitor != MON_LSI) |
| 1504 | mips_send_command ("set regsize 64\r", -1); |
| 1505 | mips_send_command ("set hostport tty0\r", -1); |
| 1506 | mips_send_command ("set brkcmd \"\"\r", -1); |
| 1507 | /* Delete all the current breakpoints: */ |
| 1508 | mips_send_command ("db *\r", -1); |
| 1509 | /* NOTE: PMON does not have breakpoint support through the |
| 1510 | "debug" mode, only at the monitor command-line. */ |
| 1511 | } |
| 1512 | |
| 1513 | mips_enter_debug (); |
| 1514 | |
| 1515 | /* Clear all breakpoints: */ |
| 1516 | if ((mips_monitor == MON_IDT |
| 1517 | && mips_clear_breakpoint (-1, 0, BREAK_UNUSED) == 0) |
| 1518 | || mips_monitor == MON_LSI) |
| 1519 | monitor_supports_breakpoints = 1; |
| 1520 | else |
| 1521 | monitor_supports_breakpoints = 0; |
| 1522 | |
| 1523 | do_cleanups (old_cleanups); |
| 1524 | |
| 1525 | /* If this doesn't call error, we have connected; we don't care if |
| 1526 | the request itself succeeds or fails. */ |
| 1527 | |
| 1528 | mips_request ('r', 0, 0, &err, mips_receive_wait, NULL); |
| 1529 | } |
| 1530 | |
| 1531 | /* Open a connection to the remote board. */ |
| 1532 | |
| 1533 | static void |
| 1534 | common_open (struct target_ops *ops, const char *name, int from_tty, |
| 1535 | enum mips_monitor_type new_monitor, |
| 1536 | const char *new_monitor_prompt) |
| 1537 | { |
| 1538 | char *serial_port_name; |
| 1539 | char *remote_name = 0; |
| 1540 | char *local_name = 0; |
| 1541 | char **argv; |
| 1542 | struct cleanup *cleanup; |
| 1543 | |
| 1544 | if (name == 0) |
| 1545 | error (_("\ |
| 1546 | To open a MIPS remote debugging connection, you need to specify what\n\ |
| 1547 | serial device is attached to the target board (e.g., /dev/ttya).\n\ |
| 1548 | If you want to use TFTP to download to the board, specify the name of a\n\ |
| 1549 | temporary file to be used by GDB for downloads as the second argument.\n\ |
| 1550 | This filename must be in the form host:filename, where host is the name\n\ |
| 1551 | of the host running the TFTP server, and the file must be readable by the\n\ |
| 1552 | world. If the local name of the temporary file differs from the name as\n\ |
| 1553 | seen from the board via TFTP, specify that name as the third parameter.\n")); |
| 1554 | |
| 1555 | /* Parse the serial port name, the optional TFTP name, and the |
| 1556 | optional local TFTP name. */ |
| 1557 | argv = gdb_buildargv (name); |
| 1558 | cleanup = make_cleanup_freeargv (argv); |
| 1559 | |
| 1560 | serial_port_name = xstrdup (argv[0]); |
| 1561 | if (argv[1]) /* Remote TFTP name specified? */ |
| 1562 | { |
| 1563 | remote_name = argv[1]; |
| 1564 | if (argv[2]) /* Local TFTP filename specified? */ |
| 1565 | local_name = argv[2]; |
| 1566 | } |
| 1567 | |
| 1568 | target_preopen (from_tty); |
| 1569 | |
| 1570 | if (mips_is_open) |
| 1571 | unpush_target (current_ops); |
| 1572 | |
| 1573 | /* Open and initialize the serial port. */ |
| 1574 | mips_desc = serial_open (serial_port_name); |
| 1575 | if (mips_desc == NULL) |
| 1576 | perror_with_name (serial_port_name); |
| 1577 | |
| 1578 | if (baud_rate != -1) |
| 1579 | { |
| 1580 | if (serial_setbaudrate (mips_desc, baud_rate)) |
| 1581 | { |
| 1582 | serial_close (mips_desc); |
| 1583 | perror_with_name (serial_port_name); |
| 1584 | } |
| 1585 | } |
| 1586 | |
| 1587 | serial_raw (mips_desc); |
| 1588 | |
| 1589 | /* Open and initialize the optional download port. If it is in the form |
| 1590 | hostname#portnumber, it's a UDP socket. If it is in the form |
| 1591 | hostname:filename, assume it's the TFTP filename that must be |
| 1592 | passed to the DDB board to tell it where to get the load file. */ |
| 1593 | if (remote_name) |
| 1594 | { |
| 1595 | if (strchr (remote_name, '#')) |
| 1596 | { |
| 1597 | udp_desc = serial_open (remote_name); |
| 1598 | if (!udp_desc) |
| 1599 | perror_with_name (_("Unable to open UDP port")); |
| 1600 | udp_in_use = 1; |
| 1601 | } |
| 1602 | else |
| 1603 | { |
| 1604 | /* Save the remote and local names of the TFTP temp file. If |
| 1605 | the user didn't specify a local name, assume it's the same |
| 1606 | as the part of the remote name after the "host:". */ |
| 1607 | if (tftp_name) |
| 1608 | xfree (tftp_name); |
| 1609 | if (tftp_localname) |
| 1610 | xfree (tftp_localname); |
| 1611 | if (local_name == NULL) |
| 1612 | if ((local_name = strchr (remote_name, ':')) != NULL) |
| 1613 | local_name++; /* Skip over the colon. */ |
| 1614 | if (local_name == NULL) |
| 1615 | local_name = remote_name; /* Local name same as remote name. */ |
| 1616 | tftp_name = xstrdup (remote_name); |
| 1617 | tftp_localname = xstrdup (local_name); |
| 1618 | tftp_in_use = 1; |
| 1619 | } |
| 1620 | } |
| 1621 | |
| 1622 | current_ops = ops; |
| 1623 | mips_is_open = 1; |
| 1624 | |
| 1625 | /* Reset the expected monitor prompt if it's never been set before. */ |
| 1626 | if (mips_monitor_prompt == NULL) |
| 1627 | mips_monitor_prompt = xstrdup (new_monitor_prompt); |
| 1628 | mips_monitor = new_monitor; |
| 1629 | |
| 1630 | mips_initialize (); |
| 1631 | |
| 1632 | if (from_tty) |
| 1633 | printf_unfiltered ("Remote MIPS debugging using %s\n", serial_port_name); |
| 1634 | |
| 1635 | /* Switch to using remote target now. */ |
| 1636 | push_target (ops); |
| 1637 | |
| 1638 | inferior_ptid = remote_mips_ptid; |
| 1639 | inferior_appeared (current_inferior (), ptid_get_pid (inferior_ptid)); |
| 1640 | add_thread_silent (inferior_ptid); |
| 1641 | |
| 1642 | /* Try to figure out the processor model if possible. */ |
| 1643 | deprecated_mips_set_processor_regs_hack (); |
| 1644 | |
| 1645 | /* This is really the job of start_remote however, that makes an |
| 1646 | assumption that the target is about to print out a status message |
| 1647 | of some sort. That doesn't happen here (in fact, it may not be |
| 1648 | possible to get the monitor to send the appropriate packet). */ |
| 1649 | |
| 1650 | reinit_frame_cache (); |
| 1651 | registers_changed (); |
| 1652 | stop_pc = regcache_read_pc (get_current_regcache ()); |
| 1653 | print_stack_frame (get_selected_frame (NULL), 0, SRC_AND_LOC, 1); |
| 1654 | xfree (serial_port_name); |
| 1655 | |
| 1656 | do_cleanups (cleanup); |
| 1657 | } |
| 1658 | |
| 1659 | /* Open a connection to an IDT board. */ |
| 1660 | |
| 1661 | static void |
| 1662 | mips_open (const char *name, int from_tty) |
| 1663 | { |
| 1664 | const char *monitor_prompt = NULL; |
| 1665 | if (gdbarch_bfd_arch_info (target_gdbarch ()) != NULL |
| 1666 | && gdbarch_bfd_arch_info (target_gdbarch ())->arch == bfd_arch_mips) |
| 1667 | { |
| 1668 | switch (gdbarch_bfd_arch_info (target_gdbarch ())->mach) |
| 1669 | { |
| 1670 | case bfd_mach_mips4100: |
| 1671 | case bfd_mach_mips4300: |
| 1672 | case bfd_mach_mips4600: |
| 1673 | case bfd_mach_mips4650: |
| 1674 | case bfd_mach_mips5000: |
| 1675 | monitor_prompt = "<RISQ> "; |
| 1676 | break; |
| 1677 | } |
| 1678 | } |
| 1679 | if (monitor_prompt == NULL) |
| 1680 | monitor_prompt = "<IDT>"; |
| 1681 | common_open (&mips_ops, name, from_tty, MON_IDT, monitor_prompt); |
| 1682 | } |
| 1683 | |
| 1684 | /* Open a connection to a PMON board. */ |
| 1685 | |
| 1686 | static void |
| 1687 | pmon_open (const char *name, int from_tty) |
| 1688 | { |
| 1689 | common_open (&pmon_ops, name, from_tty, MON_PMON, "PMON> "); |
| 1690 | } |
| 1691 | |
| 1692 | /* Open a connection to a DDB board. */ |
| 1693 | |
| 1694 | static void |
| 1695 | ddb_open (const char *name, int from_tty) |
| 1696 | { |
| 1697 | common_open (&ddb_ops, name, from_tty, MON_DDB, "NEC010>"); |
| 1698 | } |
| 1699 | |
| 1700 | /* Open a connection to a rockhopper board. */ |
| 1701 | |
| 1702 | static void |
| 1703 | rockhopper_open (const char *name, int from_tty) |
| 1704 | { |
| 1705 | common_open (&rockhopper_ops, name, from_tty, MON_ROCKHOPPER, "NEC01>"); |
| 1706 | } |
| 1707 | |
| 1708 | /* Open a connection to an LSI board. */ |
| 1709 | |
| 1710 | static void |
| 1711 | lsi_open (const char *name, int from_tty) |
| 1712 | { |
| 1713 | int i; |
| 1714 | |
| 1715 | /* Clear the LSI breakpoint table. */ |
| 1716 | for (i = 0; i < MAX_LSI_BREAKPOINTS; i++) |
| 1717 | lsi_breakpoints[i].type = BREAK_UNUSED; |
| 1718 | |
| 1719 | common_open (&lsi_ops, name, from_tty, MON_LSI, "PMON> "); |
| 1720 | } |
| 1721 | |
| 1722 | /* Close a connection to the remote board. */ |
| 1723 | |
| 1724 | static void |
| 1725 | mips_close (struct target_ops *self) |
| 1726 | { |
| 1727 | if (mips_is_open) |
| 1728 | { |
| 1729 | /* Get the board out of remote debugging mode. */ |
| 1730 | (void) mips_exit_debug (); |
| 1731 | |
| 1732 | close_ports (); |
| 1733 | } |
| 1734 | |
| 1735 | generic_mourn_inferior (); |
| 1736 | } |
| 1737 | |
| 1738 | /* Detach from the remote board. */ |
| 1739 | |
| 1740 | static void |
| 1741 | mips_detach (struct target_ops *ops, const char *args, int from_tty) |
| 1742 | { |
| 1743 | if (args) |
| 1744 | error (_("Argument given to \"detach\" when remotely debugging.")); |
| 1745 | |
| 1746 | unpush_target (ops); |
| 1747 | |
| 1748 | if (from_tty) |
| 1749 | printf_unfiltered ("Ending remote MIPS debugging.\n"); |
| 1750 | } |
| 1751 | |
| 1752 | /* Tell the target board to resume. This does not wait for a reply |
| 1753 | from the board, except in the case of single-stepping on LSI boards, |
| 1754 | where PMON does return a reply. */ |
| 1755 | |
| 1756 | static void |
| 1757 | mips_resume (struct target_ops *ops, |
| 1758 | ptid_t ptid, int step, enum gdb_signal siggnal) |
| 1759 | { |
| 1760 | int err; |
| 1761 | |
| 1762 | /* LSI PMON requires returns a reply packet "0x1 s 0x0 0x57f" after |
| 1763 | a single step, so we wait for that. */ |
| 1764 | mips_request (step ? 's' : 'c', 1, siggnal, |
| 1765 | mips_monitor == MON_LSI && step ? &err : (int *) NULL, |
| 1766 | mips_receive_wait, NULL); |
| 1767 | } |
| 1768 | |
| 1769 | /* Return the signal corresponding to SIG, where SIG is the number which |
| 1770 | the MIPS protocol uses for the signal. */ |
| 1771 | |
| 1772 | static enum gdb_signal |
| 1773 | mips_signal_from_protocol (int sig) |
| 1774 | { |
| 1775 | /* We allow a few more signals than the IDT board actually returns, on |
| 1776 | the theory that there is at least *some* hope that perhaps the numbering |
| 1777 | for these signals is widely agreed upon. */ |
| 1778 | if (sig <= 0 |
| 1779 | || sig > 31) |
| 1780 | return GDB_SIGNAL_UNKNOWN; |
| 1781 | |
| 1782 | /* Don't want to use gdb_signal_from_host because we are converting |
| 1783 | from MIPS signal numbers, not host ones. Our internal numbers |
| 1784 | match the MIPS numbers for the signals the board can return, which |
| 1785 | are: SIGINT, SIGSEGV, SIGBUS, SIGILL, SIGFPE, SIGTRAP. */ |
| 1786 | return (enum gdb_signal) sig; |
| 1787 | } |
| 1788 | |
| 1789 | /* Set the register designated by REGNO to the value designated by VALUE. */ |
| 1790 | |
| 1791 | static void |
| 1792 | mips_set_register (int regno, ULONGEST value) |
| 1793 | { |
| 1794 | gdb_byte buf[MAX_REGISTER_SIZE]; |
| 1795 | struct regcache *regcache = get_current_regcache (); |
| 1796 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| 1797 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
| 1798 | |
| 1799 | /* We got the number the register holds, but gdb expects to see a |
| 1800 | value in the target byte ordering. */ |
| 1801 | |
| 1802 | if (mips_monitor != MON_ROCKHOPPER |
| 1803 | && (regno == mips_regnum (gdbarch)->pc || regno < 32)) |
| 1804 | /* Some 64-bit boards have monitors that only send the bottom 32 bits. |
| 1805 | In such cases we can only really debug 32-bit code properly so, |
| 1806 | when reading a GPR or the PC, assume that the full 64-bit |
| 1807 | value is the sign extension of the lower 32 bits. */ |
| 1808 | store_signed_integer (buf, register_size (gdbarch, regno), byte_order, |
| 1809 | value); |
| 1810 | else |
| 1811 | store_unsigned_integer (buf, register_size (gdbarch, regno), byte_order, |
| 1812 | value); |
| 1813 | |
| 1814 | regcache_raw_supply (regcache, regno, buf); |
| 1815 | } |
| 1816 | |
| 1817 | /* Wait until the remote stops, and return a wait status. */ |
| 1818 | |
| 1819 | static ptid_t |
| 1820 | mips_wait (struct target_ops *ops, |
| 1821 | ptid_t ptid, struct target_waitstatus *status, int options) |
| 1822 | { |
| 1823 | int rstatus; |
| 1824 | int err; |
| 1825 | char buff[DATA_MAXLEN]; |
| 1826 | ULONGEST rpc, rfp, rsp; |
| 1827 | char pc_string[17], fp_string[17], sp_string[17], flags[20]; |
| 1828 | int nfields; |
| 1829 | |
| 1830 | interrupt_count = 0; |
| 1831 | hit_watchpoint = 0; |
| 1832 | |
| 1833 | /* If we have not sent a single step or continue command, then the |
| 1834 | board is waiting for us to do something. Return a status |
| 1835 | indicating that it is stopped. */ |
| 1836 | if (!mips_need_reply) |
| 1837 | { |
| 1838 | status->kind = TARGET_WAITKIND_STOPPED; |
| 1839 | status->value.sig = GDB_SIGNAL_TRAP; |
| 1840 | return inferior_ptid; |
| 1841 | } |
| 1842 | |
| 1843 | /* No timeout; we sit here as long as the program continues to execute. */ |
| 1844 | mips_wait_flag = 1; |
| 1845 | rstatus = mips_request ('\000', 0, 0, &err, -1, buff); |
| 1846 | mips_wait_flag = 0; |
| 1847 | if (err) |
| 1848 | mips_error (_("Remote failure: %s"), safe_strerror (errno)); |
| 1849 | |
| 1850 | /* On returning from a continue, the PMON monitor seems to start |
| 1851 | echoing back the messages we send prior to sending back the |
| 1852 | ACK. The code can cope with this, but to try and avoid the |
| 1853 | unnecessary serial traffic, and "spurious" characters displayed |
| 1854 | to the user, we cheat and reset the debug protocol. The problems |
| 1855 | seems to be caused by a check on the number of arguments, and the |
| 1856 | command length, within the monitor causing it to echo the command |
| 1857 | as a bad packet. */ |
| 1858 | if (mips_monitor == MON_PMON) |
| 1859 | { |
| 1860 | mips_exit_debug (); |
| 1861 | mips_enter_debug (); |
| 1862 | } |
| 1863 | |
| 1864 | /* See if we got back extended status. If so, pick out the pc, fp, |
| 1865 | sp, etc... */ |
| 1866 | |
| 1867 | nfields = sscanf (buff, |
| 1868 | "0x%*x %*c 0x%*x 0x%*x 0x%16s 0x%16s 0x%16s 0x%*x %s", |
| 1869 | pc_string, fp_string, sp_string, flags); |
| 1870 | if (nfields >= 3 |
| 1871 | && read_hex_value (pc_string, &rpc) |
| 1872 | && read_hex_value (fp_string, &rfp) |
| 1873 | && read_hex_value (sp_string, &rsp)) |
| 1874 | { |
| 1875 | struct regcache *regcache = get_current_regcache (); |
| 1876 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| 1877 | |
| 1878 | mips_set_register (gdbarch_pc_regnum (gdbarch), rpc); |
| 1879 | mips_set_register (30, rfp); |
| 1880 | mips_set_register (gdbarch_sp_regnum (gdbarch), rsp); |
| 1881 | |
| 1882 | if (nfields == 9) |
| 1883 | { |
| 1884 | int i; |
| 1885 | |
| 1886 | for (i = 0; i <= 2; i++) |
| 1887 | if (flags[i] == 'r' || flags[i] == 'w') |
| 1888 | hit_watchpoint = 1; |
| 1889 | else if (flags[i] == '\000') |
| 1890 | break; |
| 1891 | } |
| 1892 | } |
| 1893 | |
| 1894 | if (strcmp (target_shortname, "lsi") == 0) |
| 1895 | { |
| 1896 | #if 0 |
| 1897 | /* If this is an LSI PMON target, see if we just hit a |
| 1898 | hardrdware watchpoint. Right now, PMON doesn't give us |
| 1899 | enough information to determine which breakpoint we hit. So |
| 1900 | we have to look up the PC in our own table of breakpoints, |
| 1901 | and if found, assume it's just a normal instruction fetch |
| 1902 | breakpoint, not a data watchpoint. FIXME when PMON provides |
| 1903 | some way to tell us what type of breakpoint it is. */ |
| 1904 | int i; |
| 1905 | CORE_ADDR pc = regcache_read_pc (get_current_regcache ()); |
| 1906 | |
| 1907 | hit_watchpoint = 1; |
| 1908 | for (i = 0; i < MAX_LSI_BREAKPOINTS; i++) |
| 1909 | { |
| 1910 | if (lsi_breakpoints[i].addr == pc |
| 1911 | && lsi_breakpoints[i].type == BREAK_FETCH) |
| 1912 | { |
| 1913 | hit_watchpoint = 0; |
| 1914 | break; |
| 1915 | } |
| 1916 | } |
| 1917 | #else |
| 1918 | /* If a data breakpoint was hit, PMON returns the following packet: |
| 1919 | 0x1 c 0x0 0x57f 0x1 |
| 1920 | The return packet from an ordinary breakpoint doesn't have the |
| 1921 | extra 0x01 field tacked onto the end. */ |
| 1922 | if (nfields == 1 && rpc == 1) |
| 1923 | hit_watchpoint = 1; |
| 1924 | #endif |
| 1925 | } |
| 1926 | |
| 1927 | /* NOTE: The following (sig) numbers are defined by PMON: |
| 1928 | SPP_SIGTRAP 5 breakpoint |
| 1929 | SPP_SIGINT 2 |
| 1930 | SPP_SIGSEGV 11 |
| 1931 | SPP_SIGBUS 10 |
| 1932 | SPP_SIGILL 4 |
| 1933 | SPP_SIGFPE 8 |
| 1934 | SPP_SIGTERM 15 */ |
| 1935 | |
| 1936 | /* Translate a MIPS waitstatus. We use constants here rather than WTERMSIG |
| 1937 | and so on, because the constants we want here are determined by the |
| 1938 | MIPS protocol and have nothing to do with what host we are running on. */ |
| 1939 | if ((rstatus & 0xff) == 0) |
| 1940 | { |
| 1941 | status->kind = TARGET_WAITKIND_EXITED; |
| 1942 | status->value.integer = (((rstatus) >> 8) & 0xff); |
| 1943 | } |
| 1944 | else if ((rstatus & 0xff) == 0x7f) |
| 1945 | { |
| 1946 | status->kind = TARGET_WAITKIND_STOPPED; |
| 1947 | status->value.sig = mips_signal_from_protocol (((rstatus) >> 8) & 0xff); |
| 1948 | |
| 1949 | /* If the stop PC is in the _exit function, assume |
| 1950 | we hit the 'break 0x3ff' instruction in _exit, so this |
| 1951 | is not a normal breakpoint. */ |
| 1952 | if (strcmp (target_shortname, "lsi") == 0) |
| 1953 | { |
| 1954 | const char *func_name; |
| 1955 | CORE_ADDR func_start; |
| 1956 | CORE_ADDR pc = regcache_read_pc (get_current_regcache ()); |
| 1957 | |
| 1958 | find_pc_partial_function (pc, &func_name, &func_start, NULL); |
| 1959 | if (func_name != NULL && strcmp (func_name, "_exit") == 0 |
| 1960 | && func_start == pc) |
| 1961 | status->kind = TARGET_WAITKIND_EXITED; |
| 1962 | } |
| 1963 | } |
| 1964 | else |
| 1965 | { |
| 1966 | status->kind = TARGET_WAITKIND_SIGNALLED; |
| 1967 | status->value.sig = mips_signal_from_protocol (rstatus & 0x7f); |
| 1968 | } |
| 1969 | |
| 1970 | return inferior_ptid; |
| 1971 | } |
| 1972 | |
| 1973 | /* We have to map between the register numbers used by gdb and the |
| 1974 | register numbers used by the debugging protocol. */ |
| 1975 | |
| 1976 | #define REGNO_OFFSET 96 |
| 1977 | |
| 1978 | static int |
| 1979 | mips_map_regno (struct gdbarch *gdbarch, int regno) |
| 1980 | { |
| 1981 | if (regno < 32) |
| 1982 | return regno; |
| 1983 | if (regno >= mips_regnum (gdbarch)->fp0 |
| 1984 | && regno < mips_regnum (gdbarch)->fp0 + 32) |
| 1985 | return regno - mips_regnum (gdbarch)->fp0 + 32; |
| 1986 | else if (regno == mips_regnum (gdbarch)->pc) |
| 1987 | return REGNO_OFFSET + 0; |
| 1988 | else if (regno == mips_regnum (gdbarch)->cause) |
| 1989 | return REGNO_OFFSET + 1; |
| 1990 | else if (regno == mips_regnum (gdbarch)->hi) |
| 1991 | return REGNO_OFFSET + 2; |
| 1992 | else if (regno == mips_regnum (gdbarch)->lo) |
| 1993 | return REGNO_OFFSET + 3; |
| 1994 | else if (regno == mips_regnum (gdbarch)->fp_control_status) |
| 1995 | return REGNO_OFFSET + 4; |
| 1996 | else if (regno == mips_regnum (gdbarch)->fp_implementation_revision) |
| 1997 | return REGNO_OFFSET + 5; |
| 1998 | else |
| 1999 | /* FIXME: Is there a way to get the status register? */ |
| 2000 | return 0; |
| 2001 | } |
| 2002 | |
| 2003 | /* Fetch the remote registers. */ |
| 2004 | |
| 2005 | static void |
| 2006 | mips_fetch_registers (struct target_ops *ops, |
| 2007 | struct regcache *regcache, int regno) |
| 2008 | { |
| 2009 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| 2010 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
| 2011 | ULONGEST val; |
| 2012 | int err; |
| 2013 | |
| 2014 | if (regno == -1) |
| 2015 | { |
| 2016 | for (regno = 0; regno < gdbarch_num_regs (gdbarch); regno++) |
| 2017 | mips_fetch_registers (ops, regcache, regno); |
| 2018 | return; |
| 2019 | } |
| 2020 | |
| 2021 | if (regno == gdbarch_deprecated_fp_regnum (gdbarch) |
| 2022 | || regno == MIPS_ZERO_REGNUM) |
| 2023 | /* gdbarch_deprecated_fp_regnum on the mips is a hack which is just |
| 2024 | supposed to read zero (see also mips-nat.c). */ |
| 2025 | val = 0; |
| 2026 | else |
| 2027 | { |
| 2028 | /* If PMON doesn't support this register, don't waste serial |
| 2029 | bandwidth trying to read it. */ |
| 2030 | int pmon_reg = mips_map_regno (gdbarch, regno); |
| 2031 | |
| 2032 | if (regno != 0 && pmon_reg == 0) |
| 2033 | val = 0; |
| 2034 | else |
| 2035 | { |
| 2036 | /* Unfortunately the PMON version in the Vr4300 board has been |
| 2037 | compiled without the 64bit register access commands. This |
| 2038 | means we cannot get hold of the full register width. */ |
| 2039 | if (mips_monitor == MON_DDB || mips_monitor == MON_ROCKHOPPER) |
| 2040 | val = mips_request ('t', pmon_reg, 0, |
| 2041 | &err, mips_receive_wait, NULL); |
| 2042 | else |
| 2043 | val = mips_request ('r', pmon_reg, 0, |
| 2044 | &err, mips_receive_wait, NULL); |
| 2045 | if (err) |
| 2046 | mips_error (_("Can't read register %d: %s"), regno, |
| 2047 | safe_strerror (errno)); |
| 2048 | } |
| 2049 | } |
| 2050 | |
| 2051 | mips_set_register (regno, val); |
| 2052 | } |
| 2053 | |
| 2054 | /* Prepare to store registers. The MIPS protocol can store individual |
| 2055 | registers, so this function doesn't have to do anything. */ |
| 2056 | |
| 2057 | static void |
| 2058 | mips_prepare_to_store (struct target_ops *self, struct regcache *regcache) |
| 2059 | { |
| 2060 | } |
| 2061 | |
| 2062 | /* Store remote register(s). */ |
| 2063 | |
| 2064 | static void |
| 2065 | mips_store_registers (struct target_ops *ops, |
| 2066 | struct regcache *regcache, int regno) |
| 2067 | { |
| 2068 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| 2069 | ULONGEST val; |
| 2070 | int err; |
| 2071 | |
| 2072 | if (regno == -1) |
| 2073 | { |
| 2074 | for (regno = 0; regno < gdbarch_num_regs (gdbarch); regno++) |
| 2075 | mips_store_registers (ops, regcache, regno); |
| 2076 | return; |
| 2077 | } |
| 2078 | |
| 2079 | regcache_cooked_read_unsigned (regcache, regno, &val); |
| 2080 | mips_request (mips_monitor == MON_ROCKHOPPER ? 'T' : 'R', |
| 2081 | mips_map_regno (gdbarch, regno), |
| 2082 | val, |
| 2083 | &err, mips_receive_wait, NULL); |
| 2084 | if (err) |
| 2085 | mips_error (_("Can't write register %d: %s"), regno, |
| 2086 | safe_strerror (errno)); |
| 2087 | } |
| 2088 | |
| 2089 | /* Fetch a word from the target board. Return word fetched in location |
| 2090 | addressed by VALP. Return 0 when successful; return positive error |
| 2091 | code when not. */ |
| 2092 | |
| 2093 | static int |
| 2094 | mips_fetch_word (CORE_ADDR addr, unsigned int *valp) |
| 2095 | { |
| 2096 | int err; |
| 2097 | |
| 2098 | *valp = mips_request ('d', addr, 0, &err, mips_receive_wait, NULL); |
| 2099 | if (err) |
| 2100 | { |
| 2101 | /* Data space failed; try instruction space. */ |
| 2102 | *valp = mips_request ('i', addr, 0, &err, |
| 2103 | mips_receive_wait, NULL); |
| 2104 | } |
| 2105 | return err; |
| 2106 | } |
| 2107 | |
| 2108 | /* Store a word to the target board. Returns errno code or zero for |
| 2109 | success. If OLD_CONTENTS is non-NULL, put the old contents of that |
| 2110 | memory location there. */ |
| 2111 | |
| 2112 | /* FIXME! make sure only 32-bit quantities get stored! */ |
| 2113 | static int |
| 2114 | mips_store_word (CORE_ADDR addr, unsigned int val, int *old_contents) |
| 2115 | { |
| 2116 | int err; |
| 2117 | unsigned int oldcontents; |
| 2118 | |
| 2119 | oldcontents = mips_request ('D', addr, val, &err, |
| 2120 | mips_receive_wait, NULL); |
| 2121 | if (err) |
| 2122 | { |
| 2123 | /* Data space failed; try instruction space. */ |
| 2124 | oldcontents = mips_request ('I', addr, val, &err, |
| 2125 | mips_receive_wait, NULL); |
| 2126 | if (err) |
| 2127 | return errno; |
| 2128 | } |
| 2129 | if (old_contents != NULL) |
| 2130 | *old_contents = oldcontents; |
| 2131 | return 0; |
| 2132 | } |
| 2133 | |
| 2134 | /* Helper for mips_xfer_partial that handles memory transfers. |
| 2135 | Arguments are like target_xfer_partial. Note that the protocol |
| 2136 | gives us the correct value for a longword, since it transfers |
| 2137 | values in ASCII. We want the byte values, so we have to swap the |
| 2138 | longword values. */ |
| 2139 | |
| 2140 | static int mask_address_p = 1; |
| 2141 | |
| 2142 | static enum target_xfer_status |
| 2143 | mips_xfer_memory (gdb_byte *readbuf, const gdb_byte *writebuf, |
| 2144 | ULONGEST memaddr, ULONGEST len, ULONGEST *xfered_len) |
| 2145 | { |
| 2146 | enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ()); |
| 2147 | int i; |
| 2148 | CORE_ADDR addr; |
| 2149 | int count; |
| 2150 | gdb_byte *buffer; |
| 2151 | int status; |
| 2152 | |
| 2153 | /* PMON targets do not cope well with 64 bit addresses. Mask the |
| 2154 | value down to 32 bits. */ |
| 2155 | if (mask_address_p) |
| 2156 | memaddr &= (CORE_ADDR) 0xffffffff; |
| 2157 | |
| 2158 | /* Round starting address down to longword boundary. */ |
| 2159 | addr = memaddr & ~3; |
| 2160 | /* Round ending address up; get number of longwords that makes. */ |
| 2161 | count = (((memaddr + len) - addr) + 3) / 4; |
| 2162 | /* Allocate buffer of that many longwords. */ |
| 2163 | buffer = (gdb_byte *) alloca (count * 4); |
| 2164 | |
| 2165 | if (writebuf != NULL) |
| 2166 | { |
| 2167 | /* Fill start and end extra bytes of buffer with existing data. */ |
| 2168 | if (addr != memaddr || len < 4) |
| 2169 | { |
| 2170 | unsigned int val; |
| 2171 | |
| 2172 | if (mips_fetch_word (addr, &val)) |
| 2173 | return TARGET_XFER_E_IO; |
| 2174 | |
| 2175 | /* Need part of initial word -- fetch it. */ |
| 2176 | store_unsigned_integer (&buffer[0], 4, byte_order, val); |
| 2177 | } |
| 2178 | |
| 2179 | if (count > 1) |
| 2180 | { |
| 2181 | unsigned int val; |
| 2182 | |
| 2183 | /* Need part of last word -- fetch it. FIXME: we do this even |
| 2184 | if we don't need it. */ |
| 2185 | if (mips_fetch_word (addr + (count - 1) * 4, &val)) |
| 2186 | return TARGET_XFER_E_IO; |
| 2187 | |
| 2188 | store_unsigned_integer (&buffer[(count - 1) * 4], |
| 2189 | 4, byte_order, val); |
| 2190 | } |
| 2191 | |
| 2192 | /* Copy data to be written over corresponding part of buffer. */ |
| 2193 | |
| 2194 | memcpy ((char *) buffer + (memaddr & 3), writebuf, len); |
| 2195 | |
| 2196 | /* Write the entire buffer. */ |
| 2197 | |
| 2198 | for (i = 0; i < count; i++, addr += 4) |
| 2199 | { |
| 2200 | int word; |
| 2201 | |
| 2202 | word = extract_unsigned_integer (&buffer[i * 4], 4, byte_order); |
| 2203 | status = mips_store_word (addr, word, NULL); |
| 2204 | /* Report each kilobyte (we download 32-bit words at a time). */ |
| 2205 | if (i % 256 == 255) |
| 2206 | { |
| 2207 | printf_unfiltered ("*"); |
| 2208 | gdb_flush (gdb_stdout); |
| 2209 | } |
| 2210 | if (status) |
| 2211 | return TARGET_XFER_E_IO; |
| 2212 | /* FIXME: Do we want a QUIT here? */ |
| 2213 | } |
| 2214 | if (count >= 256) |
| 2215 | printf_unfiltered ("\n"); |
| 2216 | } |
| 2217 | else |
| 2218 | { |
| 2219 | /* Read all the longwords. */ |
| 2220 | for (i = 0; i < count; i++, addr += 4) |
| 2221 | { |
| 2222 | unsigned int val; |
| 2223 | |
| 2224 | if (mips_fetch_word (addr, &val)) |
| 2225 | return TARGET_XFER_E_IO; |
| 2226 | |
| 2227 | store_unsigned_integer (&buffer[i * 4], 4, byte_order, val); |
| 2228 | QUIT; |
| 2229 | } |
| 2230 | |
| 2231 | /* Copy appropriate bytes out of the buffer. */ |
| 2232 | memcpy (readbuf, buffer + (memaddr & 3), len); |
| 2233 | } |
| 2234 | *xfered_len = len; |
| 2235 | return TARGET_XFER_OK; |
| 2236 | } |
| 2237 | |
| 2238 | /* Target to_xfer_partial implementation. */ |
| 2239 | |
| 2240 | static enum target_xfer_status |
| 2241 | mips_xfer_partial (struct target_ops *ops, enum target_object object, |
| 2242 | const char *annex, gdb_byte *readbuf, |
| 2243 | const gdb_byte *writebuf, ULONGEST offset, ULONGEST len, |
| 2244 | ULONGEST *xfered_len) |
| 2245 | { |
| 2246 | switch (object) |
| 2247 | { |
| 2248 | case TARGET_OBJECT_MEMORY: |
| 2249 | return mips_xfer_memory (readbuf, writebuf, offset, len, xfered_len); |
| 2250 | |
| 2251 | default: |
| 2252 | return ops->beneath->to_xfer_partial (ops->beneath, object, annex, |
| 2253 | readbuf, writebuf, offset, len, |
| 2254 | xfered_len); |
| 2255 | } |
| 2256 | } |
| 2257 | |
| 2258 | /* Print info on this target. */ |
| 2259 | |
| 2260 | static void |
| 2261 | mips_files_info (struct target_ops *ignore) |
| 2262 | { |
| 2263 | printf_unfiltered ("Debugging a MIPS board over a serial line.\n"); |
| 2264 | } |
| 2265 | |
| 2266 | /* Kill the process running on the board. This will actually only |
| 2267 | work if we are doing remote debugging over the console input. I |
| 2268 | think that if IDT/sim had the remote debug interrupt enabled on the |
| 2269 | right port, we could interrupt the process with a break signal. */ |
| 2270 | |
| 2271 | static void |
| 2272 | mips_kill (struct target_ops *ops) |
| 2273 | { |
| 2274 | if (!mips_wait_flag) |
| 2275 | { |
| 2276 | target_mourn_inferior (); |
| 2277 | return; |
| 2278 | } |
| 2279 | |
| 2280 | interrupt_count++; |
| 2281 | |
| 2282 | if (interrupt_count >= 2) |
| 2283 | { |
| 2284 | interrupt_count = 0; |
| 2285 | |
| 2286 | target_terminal_ours (); |
| 2287 | |
| 2288 | if (query (_("Interrupted while waiting for the program.\n\ |
| 2289 | Give up (and stop debugging it)? "))) |
| 2290 | { |
| 2291 | /* Clean up in such a way that mips_close won't try to talk |
| 2292 | to the board (it almost surely won't work since we |
| 2293 | weren't able to talk to it). */ |
| 2294 | mips_wait_flag = 0; |
| 2295 | close_ports (); |
| 2296 | |
| 2297 | printf_unfiltered ("Ending remote MIPS debugging.\n"); |
| 2298 | target_mourn_inferior (); |
| 2299 | quit (); |
| 2300 | } |
| 2301 | |
| 2302 | target_terminal_inferior (); |
| 2303 | } |
| 2304 | |
| 2305 | if (remote_debug > 0) |
| 2306 | printf_unfiltered ("Sending break\n"); |
| 2307 | |
| 2308 | serial_send_break (mips_desc); |
| 2309 | |
| 2310 | target_mourn_inferior (); |
| 2311 | |
| 2312 | #if 0 |
| 2313 | if (mips_is_open) |
| 2314 | { |
| 2315 | char cc; |
| 2316 | |
| 2317 | /* Send a ^C. */ |
| 2318 | cc = '\003'; |
| 2319 | serial_write (mips_desc, &cc, 1); |
| 2320 | sleep (1); |
| 2321 | target_mourn_inferior (); |
| 2322 | } |
| 2323 | #endif |
| 2324 | } |
| 2325 | |
| 2326 | /* Start running on the target board. */ |
| 2327 | |
| 2328 | static void |
| 2329 | mips_create_inferior (struct target_ops *ops, char *execfile, |
| 2330 | char *args, char **env, int from_tty) |
| 2331 | { |
| 2332 | CORE_ADDR entry_pt; |
| 2333 | |
| 2334 | if (args && *args) |
| 2335 | { |
| 2336 | warning (_("\ |
| 2337 | Can't pass arguments to remote MIPS board; arguments ignored.")); |
| 2338 | /* And don't try to use them on the next "run" command. */ |
| 2339 | execute_command ("set args", 0); |
| 2340 | } |
| 2341 | |
| 2342 | if (execfile == 0 || exec_bfd == 0) |
| 2343 | error (_("No executable file specified")); |
| 2344 | |
| 2345 | entry_pt = (CORE_ADDR) bfd_get_start_address (exec_bfd); |
| 2346 | |
| 2347 | init_wait_for_inferior (); |
| 2348 | |
| 2349 | regcache_write_pc (get_current_regcache (), entry_pt); |
| 2350 | } |
| 2351 | |
| 2352 | /* Clean up after a process. The bulk of the work is done in mips_close(), |
| 2353 | which is called when unpushing the target. */ |
| 2354 | |
| 2355 | static void |
| 2356 | mips_mourn_inferior (struct target_ops *ops) |
| 2357 | { |
| 2358 | if (current_ops != NULL) |
| 2359 | unpush_target (current_ops); |
| 2360 | } |
| 2361 | \f |
| 2362 | /* We can write a breakpoint and read the shadow contents in one |
| 2363 | operation. */ |
| 2364 | |
| 2365 | /* Insert a breakpoint. On targets that don't have built-in |
| 2366 | breakpoint support, we read the contents of the target location and |
| 2367 | stash it, then overwrite it with a breakpoint instruction. ADDR is |
| 2368 | the target location in the target machine. BPT is the breakpoint |
| 2369 | being inserted or removed, which contains memory for saving the |
| 2370 | target contents. */ |
| 2371 | |
| 2372 | static int |
| 2373 | mips_insert_breakpoint (struct target_ops *ops, struct gdbarch *gdbarch, |
| 2374 | struct bp_target_info *bp_tgt) |
| 2375 | { |
| 2376 | if (monitor_supports_breakpoints) |
| 2377 | { |
| 2378 | bp_tgt->placed_address = bp_tgt->reqstd_address; |
| 2379 | return mips_set_breakpoint (bp_tgt->placed_address, MIPS_INSN32_SIZE, |
| 2380 | BREAK_FETCH); |
| 2381 | } |
| 2382 | else |
| 2383 | return memory_insert_breakpoint (ops, gdbarch, bp_tgt); |
| 2384 | } |
| 2385 | |
| 2386 | /* Remove a breakpoint. */ |
| 2387 | |
| 2388 | static int |
| 2389 | mips_remove_breakpoint (struct target_ops *ops, struct gdbarch *gdbarch, |
| 2390 | struct bp_target_info *bp_tgt) |
| 2391 | { |
| 2392 | if (monitor_supports_breakpoints) |
| 2393 | return mips_clear_breakpoint (bp_tgt->placed_address, MIPS_INSN32_SIZE, |
| 2394 | BREAK_FETCH); |
| 2395 | else |
| 2396 | return memory_remove_breakpoint (ops, gdbarch, bp_tgt); |
| 2397 | } |
| 2398 | |
| 2399 | /* Tell whether this target can support a hardware breakpoint. CNT |
| 2400 | is the number of hardware breakpoints already installed. This |
| 2401 | implements the target_can_use_hardware_watchpoint macro. */ |
| 2402 | |
| 2403 | static int |
| 2404 | mips_can_use_watchpoint (struct target_ops *self, |
| 2405 | enum bptype type, int cnt, int othertype) |
| 2406 | { |
| 2407 | return cnt < MAX_LSI_BREAKPOINTS && strcmp (target_shortname, "lsi") == 0; |
| 2408 | } |
| 2409 | |
| 2410 | |
| 2411 | /* Compute a don't care mask for the region bounding ADDR and ADDR + LEN - 1. |
| 2412 | This is used for memory ref breakpoints. */ |
| 2413 | |
| 2414 | static unsigned long |
| 2415 | calculate_mask (CORE_ADDR addr, int len) |
| 2416 | { |
| 2417 | unsigned long mask; |
| 2418 | int i; |
| 2419 | |
| 2420 | mask = addr ^ (addr + len - 1); |
| 2421 | |
| 2422 | for (i = 32; i >= 0; i--) |
| 2423 | if (mask == 0) |
| 2424 | break; |
| 2425 | else |
| 2426 | mask >>= 1; |
| 2427 | |
| 2428 | mask = (unsigned long) 0xffffffff >> i; |
| 2429 | |
| 2430 | return mask; |
| 2431 | } |
| 2432 | |
| 2433 | |
| 2434 | /* Set a data watchpoint. ADDR and LEN should be obvious. TYPE is 0 |
| 2435 | for a write watchpoint, 1 for a read watchpoint, or 2 for a read/write |
| 2436 | watchpoint. */ |
| 2437 | |
| 2438 | static int |
| 2439 | mips_insert_watchpoint (struct target_ops *self, |
| 2440 | CORE_ADDR addr, int len, enum target_hw_bp_type type, |
| 2441 | struct expression *cond) |
| 2442 | { |
| 2443 | /* These enum types are compatible by design. */ |
| 2444 | enum break_type btype = (enum break_type) type; |
| 2445 | |
| 2446 | if (mips_set_breakpoint (addr, len, btype)) |
| 2447 | return -1; |
| 2448 | |
| 2449 | return 0; |
| 2450 | } |
| 2451 | |
| 2452 | /* Remove a watchpoint. */ |
| 2453 | |
| 2454 | static int |
| 2455 | mips_remove_watchpoint (struct target_ops *self, |
| 2456 | CORE_ADDR addr, int len, enum target_hw_bp_type type, |
| 2457 | struct expression *cond) |
| 2458 | { |
| 2459 | /* These enum types are compatible by design. */ |
| 2460 | enum break_type btype = (enum break_type) type; |
| 2461 | |
| 2462 | if (mips_clear_breakpoint (addr, len, btype)) |
| 2463 | return -1; |
| 2464 | |
| 2465 | return 0; |
| 2466 | } |
| 2467 | |
| 2468 | /* Test to see if a watchpoint has been hit. Return 1 if so; return 0, |
| 2469 | if not. */ |
| 2470 | |
| 2471 | static int |
| 2472 | mips_stopped_by_watchpoint (struct target_ops *ops) |
| 2473 | { |
| 2474 | return hit_watchpoint; |
| 2475 | } |
| 2476 | |
| 2477 | |
| 2478 | /* Insert a breakpoint. */ |
| 2479 | |
| 2480 | static int |
| 2481 | mips_set_breakpoint (CORE_ADDR addr, int len, enum break_type type) |
| 2482 | { |
| 2483 | return mips_common_breakpoint (1, addr, len, type); |
| 2484 | } |
| 2485 | |
| 2486 | |
| 2487 | /* Clear a breakpoint. */ |
| 2488 | |
| 2489 | static int |
| 2490 | mips_clear_breakpoint (CORE_ADDR addr, int len, enum break_type type) |
| 2491 | { |
| 2492 | return mips_common_breakpoint (0, addr, len, type); |
| 2493 | } |
| 2494 | |
| 2495 | |
| 2496 | /* Check the error code from the return packet for an LSI breakpoint |
| 2497 | command. If there's no error, just return 0. If it's a warning, |
| 2498 | print the warning text and return 0. If it's an error, print |
| 2499 | the error text and return 1. <ADDR> is the address of the breakpoint |
| 2500 | that was being set. <RERRFLG> is the error code returned by PMON. |
| 2501 | This is a helper function for mips_common_breakpoint. */ |
| 2502 | |
| 2503 | static int |
| 2504 | mips_check_lsi_error (CORE_ADDR addr, int rerrflg) |
| 2505 | { |
| 2506 | struct lsi_error *err; |
| 2507 | const char *saddr = paddress (target_gdbarch (), addr); |
| 2508 | |
| 2509 | if (rerrflg == 0) /* no error */ |
| 2510 | return 0; |
| 2511 | |
| 2512 | /* Warnings can be ORed together, so check them all. */ |
| 2513 | if (rerrflg & W_WARN) |
| 2514 | { |
| 2515 | if (monitor_warnings) |
| 2516 | { |
| 2517 | int found = 0; |
| 2518 | |
| 2519 | for (err = lsi_warning_table; err->code != 0; err++) |
| 2520 | { |
| 2521 | if ((err->code & rerrflg) == err->code) |
| 2522 | { |
| 2523 | found = 1; |
| 2524 | fprintf_unfiltered (gdb_stderr, "\ |
| 2525 | mips_common_breakpoint (%s): Warning: %s\n", |
| 2526 | saddr, |
| 2527 | err->string); |
| 2528 | } |
| 2529 | } |
| 2530 | if (!found) |
| 2531 | fprintf_unfiltered (gdb_stderr, "\ |
| 2532 | mips_common_breakpoint (%s): Unknown warning: 0x%x\n", |
| 2533 | saddr, |
| 2534 | rerrflg); |
| 2535 | } |
| 2536 | return 0; |
| 2537 | } |
| 2538 | |
| 2539 | /* Errors are unique, i.e. can't be ORed together. */ |
| 2540 | for (err = lsi_error_table; err->code != 0; err++) |
| 2541 | { |
| 2542 | if ((err->code & rerrflg) == err->code) |
| 2543 | { |
| 2544 | fprintf_unfiltered (gdb_stderr, "\ |
| 2545 | mips_common_breakpoint (%s): Error: %s\n", |
| 2546 | saddr, |
| 2547 | err->string); |
| 2548 | return 1; |
| 2549 | } |
| 2550 | } |
| 2551 | fprintf_unfiltered (gdb_stderr, "\ |
| 2552 | mips_common_breakpoint (%s): Unknown error: 0x%x\n", |
| 2553 | saddr, |
| 2554 | rerrflg); |
| 2555 | return 1; |
| 2556 | } |
| 2557 | |
| 2558 | |
| 2559 | /* This routine sends a breakpoint command to the remote target. |
| 2560 | |
| 2561 | <SET> is 1 if setting a breakpoint, or 0 if clearing a breakpoint. |
| 2562 | <ADDR> is the address of the breakpoint. |
| 2563 | <LEN> the length of the region to break on. |
| 2564 | <TYPE> is the type of breakpoint: |
| 2565 | 0 = write (BREAK_WRITE) |
| 2566 | 1 = read (BREAK_READ) |
| 2567 | 2 = read/write (BREAK_ACCESS) |
| 2568 | 3 = instruction fetch (BREAK_FETCH) |
| 2569 | |
| 2570 | Return 0 if successful; otherwise 1. */ |
| 2571 | |
| 2572 | static int |
| 2573 | mips_common_breakpoint (int set, CORE_ADDR addr, int len, enum break_type type) |
| 2574 | { |
| 2575 | int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8; |
| 2576 | char buf[DATA_MAXLEN + 1]; |
| 2577 | char cmd, rcmd; |
| 2578 | int rpid, rerrflg, rresponse, rlen; |
| 2579 | int nfields; |
| 2580 | |
| 2581 | addr = gdbarch_addr_bits_remove (target_gdbarch (), addr); |
| 2582 | |
| 2583 | if (mips_monitor == MON_LSI) |
| 2584 | { |
| 2585 | if (set == 0) /* clear breakpoint */ |
| 2586 | { |
| 2587 | /* The LSI PMON "clear breakpoint" has this form: |
| 2588 | <pid> 'b' <bptn> 0x0 |
| 2589 | reply: |
| 2590 | <pid> 'b' 0x0 <code> |
| 2591 | |
| 2592 | <bptn> is a breakpoint number returned by an earlier 'B' command. |
| 2593 | Possible return codes: OK, E_BPT. */ |
| 2594 | |
| 2595 | int i; |
| 2596 | |
| 2597 | /* Search for the breakpoint in the table. */ |
| 2598 | for (i = 0; i < MAX_LSI_BREAKPOINTS; i++) |
| 2599 | if (lsi_breakpoints[i].type == type |
| 2600 | && lsi_breakpoints[i].addr == addr |
| 2601 | && lsi_breakpoints[i].len == len) |
| 2602 | break; |
| 2603 | |
| 2604 | /* Clear the table entry and tell PMON to clear the breakpoint. */ |
| 2605 | if (i == MAX_LSI_BREAKPOINTS) |
| 2606 | { |
| 2607 | warning (_("\ |
| 2608 | mips_common_breakpoint: Attempt to clear bogus breakpoint at %s"), |
| 2609 | paddress (target_gdbarch (), addr)); |
| 2610 | return 1; |
| 2611 | } |
| 2612 | |
| 2613 | lsi_breakpoints[i].type = BREAK_UNUSED; |
| 2614 | sprintf (buf, "0x0 b 0x%x 0x0", i); |
| 2615 | mips_send_packet (buf, 1); |
| 2616 | |
| 2617 | rlen = mips_receive_packet (buf, 1, mips_receive_wait); |
| 2618 | buf[rlen] = '\0'; |
| 2619 | |
| 2620 | nfields = sscanf (buf, "0x%x b 0x0 0x%x", &rpid, &rerrflg); |
| 2621 | if (nfields != 2) |
| 2622 | mips_error (_("mips_common_breakpoint: " |
| 2623 | "Bad response from remote board: %s"), |
| 2624 | buf); |
| 2625 | |
| 2626 | return (mips_check_lsi_error (addr, rerrflg)); |
| 2627 | } |
| 2628 | else |
| 2629 | /* set a breakpoint */ |
| 2630 | { |
| 2631 | /* The LSI PMON "set breakpoint" command has this form: |
| 2632 | <pid> 'B' <addr> 0x0 |
| 2633 | reply: |
| 2634 | <pid> 'B' <bptn> <code> |
| 2635 | |
| 2636 | The "set data breakpoint" command has this form: |
| 2637 | |
| 2638 | <pid> 'A' <addr1> <type> [<addr2> [<value>]] |
| 2639 | |
| 2640 | where: type= "0x1" = read |
| 2641 | "0x2" = write |
| 2642 | "0x3" = access (read or write) |
| 2643 | |
| 2644 | The reply returns two values: |
| 2645 | bptn - a breakpoint number, which is a small integer with |
| 2646 | possible values of zero through 255. |
| 2647 | code - an error return code, a value of zero indicates a |
| 2648 | succesful completion, other values indicate various |
| 2649 | errors and warnings. |
| 2650 | |
| 2651 | Possible return codes: OK, W_QAL, E_QAL, E_OUT, E_NON. */ |
| 2652 | |
| 2653 | if (type == BREAK_FETCH) /* instruction breakpoint */ |
| 2654 | { |
| 2655 | cmd = 'B'; |
| 2656 | sprintf (buf, "0x0 B 0x%s 0x0", phex_nz (addr, addr_size)); |
| 2657 | } |
| 2658 | else |
| 2659 | /* watchpoint */ |
| 2660 | { |
| 2661 | cmd = 'A'; |
| 2662 | sprintf (buf, "0x0 A 0x%s 0x%x 0x%s", |
| 2663 | phex_nz (addr, addr_size), |
| 2664 | type == BREAK_READ ? 1 : (type == BREAK_WRITE ? 2 : 3), |
| 2665 | phex_nz (addr + len - 1, addr_size)); |
| 2666 | } |
| 2667 | mips_send_packet (buf, 1); |
| 2668 | |
| 2669 | rlen = mips_receive_packet (buf, 1, mips_receive_wait); |
| 2670 | buf[rlen] = '\0'; |
| 2671 | |
| 2672 | nfields = sscanf (buf, "0x%x %c 0x%x 0x%x", |
| 2673 | &rpid, &rcmd, &rresponse, &rerrflg); |
| 2674 | if (nfields != 4 || rcmd != cmd || rresponse > 255) |
| 2675 | mips_error (_("mips_common_breakpoint: " |
| 2676 | "Bad response from remote board: %s"), |
| 2677 | buf); |
| 2678 | |
| 2679 | if (rerrflg != 0) |
| 2680 | if (mips_check_lsi_error (addr, rerrflg)) |
| 2681 | return 1; |
| 2682 | |
| 2683 | /* rresponse contains PMON's breakpoint number. Record the |
| 2684 | information for this breakpoint so we can clear it later. */ |
| 2685 | lsi_breakpoints[rresponse].type = type; |
| 2686 | lsi_breakpoints[rresponse].addr = addr; |
| 2687 | lsi_breakpoints[rresponse].len = len; |
| 2688 | |
| 2689 | return 0; |
| 2690 | } |
| 2691 | } |
| 2692 | else |
| 2693 | { |
| 2694 | /* On non-LSI targets, the breakpoint command has this form: |
| 2695 | 0x0 <CMD> <ADDR> <MASK> <FLAGS> |
| 2696 | <MASK> is a don't care mask for addresses. |
| 2697 | <FLAGS> is any combination of `r', `w', or `f' for |
| 2698 | read/write/fetch. */ |
| 2699 | |
| 2700 | unsigned long mask; |
| 2701 | |
| 2702 | mask = calculate_mask (addr, len); |
| 2703 | addr &= ~mask; |
| 2704 | |
| 2705 | if (set) /* set a breakpoint */ |
| 2706 | { |
| 2707 | char *flags; |
| 2708 | |
| 2709 | switch (type) |
| 2710 | { |
| 2711 | case BREAK_WRITE: /* write */ |
| 2712 | flags = "w"; |
| 2713 | break; |
| 2714 | case BREAK_READ: /* read */ |
| 2715 | flags = "r"; |
| 2716 | break; |
| 2717 | case BREAK_ACCESS: /* read/write */ |
| 2718 | flags = "rw"; |
| 2719 | break; |
| 2720 | case BREAK_FETCH: /* fetch */ |
| 2721 | flags = "f"; |
| 2722 | break; |
| 2723 | default: |
| 2724 | internal_error (__FILE__, __LINE__, |
| 2725 | _("failed internal consistency check")); |
| 2726 | } |
| 2727 | |
| 2728 | cmd = 'B'; |
| 2729 | sprintf (buf, "0x0 B 0x%s 0x%s %s", phex_nz (addr, addr_size), |
| 2730 | phex_nz (mask, addr_size), flags); |
| 2731 | } |
| 2732 | else |
| 2733 | { |
| 2734 | cmd = 'b'; |
| 2735 | sprintf (buf, "0x0 b 0x%s", phex_nz (addr, addr_size)); |
| 2736 | } |
| 2737 | |
| 2738 | mips_send_packet (buf, 1); |
| 2739 | |
| 2740 | rlen = mips_receive_packet (buf, 1, mips_receive_wait); |
| 2741 | buf[rlen] = '\0'; |
| 2742 | |
| 2743 | nfields = sscanf (buf, "0x%x %c 0x%x 0x%x", |
| 2744 | &rpid, &rcmd, &rerrflg, &rresponse); |
| 2745 | |
| 2746 | if (nfields != 4 || rcmd != cmd) |
| 2747 | mips_error (_("mips_common_breakpoint: " |
| 2748 | "Bad response from remote board: %s"), |
| 2749 | buf); |
| 2750 | |
| 2751 | if (rerrflg != 0) |
| 2752 | { |
| 2753 | /* Ddb returns "0x0 b 0x16 0x0\000", whereas |
| 2754 | Cogent returns "0x0 b 0xffffffff 0x16\000": */ |
| 2755 | if (mips_monitor == MON_DDB) |
| 2756 | rresponse = rerrflg; |
| 2757 | if (rresponse != 22) /* invalid argument */ |
| 2758 | fprintf_unfiltered (gdb_stderr, "\ |
| 2759 | mips_common_breakpoint (%s): Got error: 0x%x\n", |
| 2760 | paddress (target_gdbarch (), addr), rresponse); |
| 2761 | return 1; |
| 2762 | } |
| 2763 | } |
| 2764 | return 0; |
| 2765 | } |
| 2766 | \f |
| 2767 | /* Send one S record as specified by SREC of length LEN, starting |
| 2768 | at ADDR. Note, however, that ADDR is not used except to provide |
| 2769 | a useful message to the user in the event that a NACK is received |
| 2770 | from the board. */ |
| 2771 | |
| 2772 | static void |
| 2773 | send_srec (char *srec, int len, CORE_ADDR addr) |
| 2774 | { |
| 2775 | while (1) |
| 2776 | { |
| 2777 | int ch; |
| 2778 | |
| 2779 | serial_write (mips_desc, srec, len); |
| 2780 | |
| 2781 | ch = mips_readchar (remote_timeout); |
| 2782 | |
| 2783 | switch (ch) |
| 2784 | { |
| 2785 | case SERIAL_TIMEOUT: |
| 2786 | error (_("Timeout during download.")); |
| 2787 | break; |
| 2788 | case 0x6: /* ACK */ |
| 2789 | return; |
| 2790 | case 0x15: /* NACK */ |
| 2791 | fprintf_unfiltered (gdb_stderr, |
| 2792 | "Download got a NACK at byte %s! Retrying.\n", |
| 2793 | paddress (target_gdbarch (), addr)); |
| 2794 | continue; |
| 2795 | default: |
| 2796 | error (_("Download got unexpected ack char: 0x%x, retrying."), |
| 2797 | ch); |
| 2798 | } |
| 2799 | } |
| 2800 | } |
| 2801 | |
| 2802 | /* Download a binary file by converting it to S records. */ |
| 2803 | |
| 2804 | static void |
| 2805 | mips_load_srec (const char *args) |
| 2806 | { |
| 2807 | bfd *abfd; |
| 2808 | asection *s; |
| 2809 | char srec[1024]; |
| 2810 | bfd_byte *buffer; |
| 2811 | unsigned int i; |
| 2812 | unsigned int srec_frame = 200; |
| 2813 | int reclen; |
| 2814 | struct cleanup *cleanup; |
| 2815 | static int hashmark = 1; |
| 2816 | |
| 2817 | buffer = (bfd_byte *) alloca (srec_frame * 2 + 256); |
| 2818 | |
| 2819 | abfd = gdb_bfd_open (args, NULL, -1); |
| 2820 | if (!abfd) |
| 2821 | { |
| 2822 | printf_filtered ("Unable to open file %s\n", args); |
| 2823 | return; |
| 2824 | } |
| 2825 | |
| 2826 | cleanup = make_cleanup_bfd_unref (abfd); |
| 2827 | if (bfd_check_format (abfd, bfd_object) == 0) |
| 2828 | { |
| 2829 | printf_filtered ("File is not an object file\n"); |
| 2830 | do_cleanups (cleanup); |
| 2831 | return; |
| 2832 | } |
| 2833 | |
| 2834 | /* This actually causes a download in the IDT binary format: */ |
| 2835 | mips_send_command (LOAD_CMD, 0); |
| 2836 | |
| 2837 | for (s = abfd->sections; s; s = s->next) |
| 2838 | { |
| 2839 | if (s->flags & SEC_LOAD) |
| 2840 | { |
| 2841 | unsigned int numbytes; |
| 2842 | |
| 2843 | /* FIXME! vma too small????? */ |
| 2844 | printf_filtered ("%s\t: 0x%4lx .. 0x%4lx ", s->name, |
| 2845 | (long) s->vma, |
| 2846 | (long) (s->vma + bfd_get_section_size (s))); |
| 2847 | gdb_flush (gdb_stdout); |
| 2848 | |
| 2849 | for (i = 0; i < bfd_get_section_size (s); i += numbytes) |
| 2850 | { |
| 2851 | numbytes = min (srec_frame, bfd_get_section_size (s) - i); |
| 2852 | |
| 2853 | bfd_get_section_contents (abfd, s, buffer, i, numbytes); |
| 2854 | |
| 2855 | reclen = mips_make_srec (srec, '3', s->vma + i, |
| 2856 | buffer, numbytes); |
| 2857 | send_srec (srec, reclen, s->vma + i); |
| 2858 | |
| 2859 | if (deprecated_ui_load_progress_hook) |
| 2860 | deprecated_ui_load_progress_hook (s->name, i); |
| 2861 | |
| 2862 | if (hashmark) |
| 2863 | { |
| 2864 | putchar_unfiltered ('#'); |
| 2865 | gdb_flush (gdb_stdout); |
| 2866 | } |
| 2867 | |
| 2868 | } /* Per-packet (or S-record) loop */ |
| 2869 | |
| 2870 | putchar_unfiltered ('\n'); |
| 2871 | } /* Loadable sections */ |
| 2872 | } |
| 2873 | if (hashmark) |
| 2874 | putchar_unfiltered ('\n'); |
| 2875 | |
| 2876 | /* Write a type 7 terminator record. no data for a type 7, and there |
| 2877 | is no data, so len is 0. */ |
| 2878 | |
| 2879 | reclen = mips_make_srec (srec, '7', abfd->start_address, NULL, 0); |
| 2880 | |
| 2881 | send_srec (srec, reclen, abfd->start_address); |
| 2882 | |
| 2883 | serial_flush_input (mips_desc); |
| 2884 | do_cleanups (cleanup); |
| 2885 | } |
| 2886 | |
| 2887 | /* |
| 2888 | * mips_make_srec -- make an srecord. This writes each line, one at a |
| 2889 | * time, each with it's own header and trailer line. |
| 2890 | * An srecord looks like this: |
| 2891 | * |
| 2892 | * byte count-+ address |
| 2893 | * start ---+ | | data +- checksum |
| 2894 | * | | | | |
| 2895 | * S01000006F6B692D746573742E73726563E4 |
| 2896 | * S315000448600000000000000000FC00005900000000E9 |
| 2897 | * S31A0004000023C1400037DE00F023604000377B009020825000348D |
| 2898 | * S30B0004485A0000000000004E |
| 2899 | * S70500040000F6 |
| 2900 | * |
| 2901 | * S<type><length><address><data><checksum> |
| 2902 | * |
| 2903 | * Where |
| 2904 | * - length |
| 2905 | * is the number of bytes following upto the checksum. Note that |
| 2906 | * this is not the number of chars following, since it takes two |
| 2907 | * chars to represent a byte. |
| 2908 | * - type |
| 2909 | * is one of: |
| 2910 | * 0) header record |
| 2911 | * 1) two byte address data record |
| 2912 | * 2) three byte address data record |
| 2913 | * 3) four byte address data record |
| 2914 | * 7) four byte address termination record |
| 2915 | * 8) three byte address termination record |
| 2916 | * 9) two byte address termination record |
| 2917 | * |
| 2918 | * - address |
| 2919 | * is the start address of the data following, or in the case of |
| 2920 | * a termination record, the start address of the image |
| 2921 | * - data |
| 2922 | * is the data. |
| 2923 | * - checksum |
| 2924 | * is the sum of all the raw byte data in the record, from the length |
| 2925 | * upwards, modulo 256 and subtracted from 255. |
| 2926 | * |
| 2927 | * This routine returns the length of the S-record. |
| 2928 | * |
| 2929 | */ |
| 2930 | |
| 2931 | static int |
| 2932 | mips_make_srec (char *buf, int type, CORE_ADDR memaddr, unsigned char *myaddr, |
| 2933 | int len) |
| 2934 | { |
| 2935 | unsigned char checksum; |
| 2936 | int i; |
| 2937 | |
| 2938 | /* Create the header for the srec. addr_size is the number of bytes |
| 2939 | in the address, and 1 is the number of bytes in the count. */ |
| 2940 | |
| 2941 | /* FIXME!! bigger buf required for 64-bit! */ |
| 2942 | buf[0] = 'S'; |
| 2943 | buf[1] = type; |
| 2944 | buf[2] = len + 4 + 1; /* len + 4 byte address + 1 byte checksum */ |
| 2945 | /* This assumes S3 style downloads (4byte addresses). There should |
| 2946 | probably be a check, or the code changed to make it more |
| 2947 | explicit. */ |
| 2948 | buf[3] = memaddr >> 24; |
| 2949 | buf[4] = memaddr >> 16; |
| 2950 | buf[5] = memaddr >> 8; |
| 2951 | buf[6] = memaddr; |
| 2952 | memcpy (&buf[7], myaddr, len); |
| 2953 | |
| 2954 | /* Note that the checksum is calculated on the raw data, not the |
| 2955 | hexified data. It includes the length, address and the data |
| 2956 | portions of the packet. */ |
| 2957 | checksum = 0; |
| 2958 | buf += 2; /* Point at length byte. */ |
| 2959 | for (i = 0; i < len + 4 + 1; i++) |
| 2960 | checksum += *buf++; |
| 2961 | |
| 2962 | *buf = ~checksum; |
| 2963 | |
| 2964 | return len + 8; |
| 2965 | } |
| 2966 | |
| 2967 | /* The following manifest controls whether we enable the simple flow |
| 2968 | control support provided by the monitor. If enabled the code will |
| 2969 | wait for an affirmative ACK between transmitting packets. */ |
| 2970 | #define DOETXACK (1) |
| 2971 | |
| 2972 | /* The PMON fast-download uses an encoded packet format constructed of |
| 2973 | 3byte data packets (encoded as 4 printable ASCII characters), and |
| 2974 | escape sequences (preceded by a '/'): |
| 2975 | |
| 2976 | 'K' clear checksum |
| 2977 | 'C' compare checksum (12bit value, not included in checksum calculation) |
| 2978 | 'S' define symbol name (for addr) terminated with "," |
| 2979 | and padded to 4char boundary |
| 2980 | 'Z' zero fill multiple of 3bytes |
| 2981 | 'B' byte (12bit encoded value, of 8bit data) |
| 2982 | 'A' address (36bit encoded value) |
| 2983 | 'E' define entry as original address, and exit load |
| 2984 | |
| 2985 | The packets are processed in 4 character chunks, so the escape |
| 2986 | sequences that do not have any data (or variable length data) |
| 2987 | should be padded to a 4 character boundary. The decoder will give |
| 2988 | an error if the complete message block size is not a multiple of |
| 2989 | 4bytes (size of record). |
| 2990 | |
| 2991 | The encoding of numbers is done in 6bit fields. The 6bit value is |
| 2992 | used to index into this string to get the specific character |
| 2993 | encoding for the value: */ |
| 2994 | static char encoding[] = |
| 2995 | "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789,."; |
| 2996 | |
| 2997 | /* Convert the number of bits required into an encoded number, 6bits |
| 2998 | at a time (range 0..63). Keep a checksum if required (passed |
| 2999 | pointer non-NULL). The function returns the number of encoded |
| 3000 | characters written into the buffer. */ |
| 3001 | |
| 3002 | static int |
| 3003 | pmon_makeb64 (unsigned long v, char *p, int n, unsigned int *chksum) |
| 3004 | { |
| 3005 | int count = (n / 6); |
| 3006 | |
| 3007 | if ((n % 12) != 0) |
| 3008 | { |
| 3009 | fprintf_unfiltered (gdb_stderr, |
| 3010 | "Fast encoding bitcount must be a " |
| 3011 | "multiple of 12bits: %dbit%s\n", |
| 3012 | n, (n == 1) ? "" : "s"); |
| 3013 | return (0); |
| 3014 | } |
| 3015 | if (n > 36) |
| 3016 | { |
| 3017 | fprintf_unfiltered (gdb_stderr, |
| 3018 | "Fast encoding cannot process more " |
| 3019 | "than 36bits at the moment: %dbits\n", n); |
| 3020 | return (0); |
| 3021 | } |
| 3022 | |
| 3023 | /* Deal with the checksum: */ |
| 3024 | if (chksum != NULL) |
| 3025 | { |
| 3026 | switch (n) |
| 3027 | { |
| 3028 | case 36: |
| 3029 | *chksum += ((v >> 24) & 0xFFF); |
| 3030 | case 24: |
| 3031 | *chksum += ((v >> 12) & 0xFFF); |
| 3032 | case 12: |
| 3033 | *chksum += ((v >> 0) & 0xFFF); |
| 3034 | } |
| 3035 | } |
| 3036 | |
| 3037 | do |
| 3038 | { |
| 3039 | n -= 6; |
| 3040 | *p++ = encoding[(v >> n) & 0x3F]; |
| 3041 | } |
| 3042 | while (n > 0); |
| 3043 | |
| 3044 | return (count); |
| 3045 | } |
| 3046 | |
| 3047 | /* Shorthand function (that could be in-lined) to output the zero-fill |
| 3048 | escape sequence into the data stream. */ |
| 3049 | |
| 3050 | static int |
| 3051 | pmon_zeroset (int recsize, char **buff, |
| 3052 | unsigned int *amount, unsigned int *chksum) |
| 3053 | { |
| 3054 | int count; |
| 3055 | |
| 3056 | sprintf (*buff, "/Z"); |
| 3057 | count = pmon_makeb64 (*amount, (*buff + 2), 12, chksum); |
| 3058 | *buff += (count + 2); |
| 3059 | *amount = 0; |
| 3060 | return (recsize + count + 2); |
| 3061 | } |
| 3062 | |
| 3063 | /* Add the checksum specified by *VALUE to end of the record under |
| 3064 | construction. *BUF specifies the location at which to begin |
| 3065 | writing characters comprising the checksum information. RECSIZE |
| 3066 | specifies the size of the record constructed thus far. (A trailing |
| 3067 | NUL character may be present in the buffer holding the record, but |
| 3068 | the record size does not include this character.) |
| 3069 | |
| 3070 | Return the total size of the record after adding the checksum escape, |
| 3071 | the checksum itself, and the trailing newline. |
| 3072 | |
| 3073 | The checksum specified by *VALUE is zeroed out prior to returning. |
| 3074 | Additionally, *BUF is updated to refer to the location just beyond |
| 3075 | the record elements added by this call. */ |
| 3076 | |
| 3077 | static int |
| 3078 | pmon_checkset (int recsize, char **buff, unsigned int *value) |
| 3079 | { |
| 3080 | int count; |
| 3081 | |
| 3082 | /* Add the checksum (without updating the value): */ |
| 3083 | sprintf (*buff, "/C"); |
| 3084 | count = pmon_makeb64 (*value, (*buff + 2), 12, NULL); |
| 3085 | *buff += (count + 2); |
| 3086 | sprintf (*buff, "\n"); |
| 3087 | *buff += 2; /* Include zero terminator. */ |
| 3088 | /* Forcing a checksum validation clears the sum: */ |
| 3089 | *value = 0; |
| 3090 | return (recsize + count + 3); |
| 3091 | } |
| 3092 | |
| 3093 | /* Amount of padding we leave after at the end of the output buffer, |
| 3094 | for the checksum and line termination characters: */ |
| 3095 | #define CHECKSIZE (4 + 4 + 4 + 2) |
| 3096 | /* zero-fill, checksum, transfer end and line termination space. */ |
| 3097 | |
| 3098 | /* The amount of binary data loaded from the object file in a single |
| 3099 | operation: */ |
| 3100 | #define BINCHUNK (1024) |
| 3101 | |
| 3102 | /* Maximum line of data accepted by the monitor: */ |
| 3103 | #define MAXRECSIZE (550) |
| 3104 | /* NOTE: This constant depends on the monitor being used. This value |
| 3105 | is for PMON 5.x on the Cogent Vr4300 board. */ |
| 3106 | |
| 3107 | /* Create a FastLoad format record. |
| 3108 | |
| 3109 | *OUTBUF is the buffer into which a FastLoad formatted record is |
| 3110 | written. On return, the pointer position represented by *OUTBUF |
| 3111 | is updated to point at the end of the data, i.e. the next position |
| 3112 | in the buffer that may be written. No attempt is made to NUL- |
| 3113 | terminate this portion of the record written to the buffer. |
| 3114 | |
| 3115 | INBUF contains the binary input data from which the FastLoad |
| 3116 | formatted record will be built. *INPTR is an index into this |
| 3117 | buffer. *INPTR is updated as the input is consumed. Thus, on |
| 3118 | return, the caller has access to the position of the next input |
| 3119 | byte yet to be processed. INAMOUNT is the size, in bytes, of the |
| 3120 | input data. |
| 3121 | |
| 3122 | *RECSIZE will be written with the size of the record written to the |
| 3123 | output buffer prior to returning. This size does not include a |
| 3124 | NUL-termination byte as none is written to the output buffer. |
| 3125 | |
| 3126 | *CSUM is the output buffer checksum. It is updated as data is |
| 3127 | written to the output buffer. |
| 3128 | |
| 3129 | *ZEROFILL is the current number of 3-byte zero sequences that have |
| 3130 | been encountered. It is both an input and an output to this |
| 3131 | function. */ |
| 3132 | |
| 3133 | static void |
| 3134 | pmon_make_fastrec (char **outbuf, unsigned char *inbuf, int *inptr, |
| 3135 | int inamount, int *recsize, unsigned int *csum, |
| 3136 | unsigned int *zerofill) |
| 3137 | { |
| 3138 | int count = 0; |
| 3139 | char *p = *outbuf; |
| 3140 | |
| 3141 | /* This is a simple check to ensure that our data will fit within |
| 3142 | the maximum allowable record size. Each record output is 4bytes |
| 3143 | in length. We must allow space for a pending zero fill command, |
| 3144 | the record, and a checksum record. */ |
| 3145 | while ((*recsize < (MAXRECSIZE - CHECKSIZE)) && ((inamount - *inptr) > 0)) |
| 3146 | { |
| 3147 | /* Process the binary data: */ |
| 3148 | if ((inamount - *inptr) < 3) |
| 3149 | { |
| 3150 | if (*zerofill != 0) |
| 3151 | *recsize = pmon_zeroset (*recsize, &p, zerofill, csum); |
| 3152 | sprintf (p, "/B"); |
| 3153 | count = pmon_makeb64 (inbuf[*inptr], &p[2], 12, csum); |
| 3154 | p += (2 + count); |
| 3155 | *recsize += (2 + count); |
| 3156 | (*inptr)++; |
| 3157 | } |
| 3158 | else |
| 3159 | { |
| 3160 | unsigned int value = ((inbuf[*inptr + 0] << 16) |
| 3161 | | (inbuf[*inptr + 1] << 8) |
| 3162 | | (inbuf[*inptr + 2])); |
| 3163 | |
| 3164 | /* Simple check for zero data. TODO: A better check would be |
| 3165 | to check the last, and then the middle byte for being zero |
| 3166 | (if the first byte is not). We could then check for |
| 3167 | following runs of zeros, and if above a certain size it is |
| 3168 | worth the 4 or 8 character hit of the byte insertions used |
| 3169 | to pad to the start of the zeroes. NOTE: This also depends |
| 3170 | on the alignment at the end of the zero run. */ |
| 3171 | if (value == 0x00000000) |
| 3172 | { |
| 3173 | (*zerofill)++; |
| 3174 | if (*zerofill == 0xFFF) /* 12bit counter */ |
| 3175 | *recsize = pmon_zeroset (*recsize, &p, zerofill, csum); |
| 3176 | } |
| 3177 | else |
| 3178 | { |
| 3179 | if (*zerofill != 0) |
| 3180 | *recsize = pmon_zeroset (*recsize, &p, zerofill, csum); |
| 3181 | count = pmon_makeb64 (value, p, 24, csum); |
| 3182 | p += count; |
| 3183 | *recsize += count; |
| 3184 | } |
| 3185 | *inptr += 3; |
| 3186 | } |
| 3187 | } |
| 3188 | |
| 3189 | *outbuf = p; |
| 3190 | return; |
| 3191 | } |
| 3192 | |
| 3193 | /* Attempt to read an ACK. If an ACK is not read in a timely manner, |
| 3194 | output the message specified by MESG. Return -1 for failure, 0 |
| 3195 | for success. */ |
| 3196 | |
| 3197 | static int |
| 3198 | pmon_check_ack (char *mesg) |
| 3199 | { |
| 3200 | #if defined(DOETXACK) |
| 3201 | int c; |
| 3202 | |
| 3203 | if (!tftp_in_use) |
| 3204 | { |
| 3205 | c = serial_readchar (udp_in_use ? udp_desc : mips_desc, |
| 3206 | remote_timeout); |
| 3207 | if ((c == SERIAL_TIMEOUT) || (c != 0x06)) |
| 3208 | { |
| 3209 | fprintf_unfiltered (gdb_stderr, |
| 3210 | "Failed to receive valid ACK for %s\n", mesg); |
| 3211 | return (-1); /* Terminate the download. */ |
| 3212 | } |
| 3213 | } |
| 3214 | #endif /* DOETXACK */ |
| 3215 | return (0); |
| 3216 | } |
| 3217 | |
| 3218 | /* pmon_download - Send a sequence of characters to the PMON download port, |
| 3219 | which is either a serial port or a UDP socket. */ |
| 3220 | |
| 3221 | static void |
| 3222 | pmon_start_download (void) |
| 3223 | { |
| 3224 | if (tftp_in_use) |
| 3225 | { |
| 3226 | /* Create the temporary download file. */ |
| 3227 | if ((tftp_file = fopen (tftp_localname, "w")) == NULL) |
| 3228 | perror_with_name (tftp_localname); |
| 3229 | } |
| 3230 | else |
| 3231 | { |
| 3232 | mips_send_command (udp_in_use ? LOAD_CMD_UDP : LOAD_CMD, 0); |
| 3233 | mips_expect ("Downloading from "); |
| 3234 | mips_expect (udp_in_use ? "udp" : "tty0"); |
| 3235 | mips_expect (", ^C to abort\r\n"); |
| 3236 | } |
| 3237 | } |
| 3238 | |
| 3239 | /* Look for the string specified by STRING sent from the target board |
| 3240 | during a download operation. If the string in question is not |
| 3241 | seen, output an error message, remove the temporary file, if |
| 3242 | appropriate, and return 0. Otherwise, return 1 to indicate |
| 3243 | success. */ |
| 3244 | |
| 3245 | static int |
| 3246 | mips_expect_download (char *string) |
| 3247 | { |
| 3248 | if (!mips_expect (string)) |
| 3249 | { |
| 3250 | fprintf_unfiltered (gdb_stderr, "Load did not complete successfully.\n"); |
| 3251 | if (tftp_in_use) |
| 3252 | remove (tftp_localname); /* Remove temporary file. */ |
| 3253 | return 0; |
| 3254 | } |
| 3255 | else |
| 3256 | return 1; |
| 3257 | } |
| 3258 | |
| 3259 | /* Look for messages from the target board associated with the entry |
| 3260 | address. |
| 3261 | |
| 3262 | NOTE: This function doesn't indicate success or failure, so we |
| 3263 | have no way to determine whether or not the output from the board |
| 3264 | was correctly seen. However, given that other items are checked |
| 3265 | after this, it seems unlikely that those checks will pass if this |
| 3266 | check doesn't first (silently) pass. */ |
| 3267 | |
| 3268 | static void |
| 3269 | pmon_check_entry_address (char *entry_address, int final) |
| 3270 | { |
| 3271 | char hexnumber[9]; /* Includes '\0' space. */ |
| 3272 | |
| 3273 | mips_expect_timeout (entry_address, tftp_in_use ? 15 : remote_timeout); |
| 3274 | sprintf (hexnumber, "%x", final); |
| 3275 | mips_expect (hexnumber); |
| 3276 | mips_expect ("\r\n"); |
| 3277 | } |
| 3278 | |
| 3279 | /* Look for messages from the target board showing the total number of |
| 3280 | bytes downloaded to the board. Output 1 for success if the tail |
| 3281 | end of the message was read correctly, 0 otherwise. */ |
| 3282 | |
| 3283 | static int |
| 3284 | pmon_check_total (int bintotal) |
| 3285 | { |
| 3286 | char hexnumber[9]; /* Includes '\0' space. */ |
| 3287 | |
| 3288 | mips_expect ("\r\ntotal = 0x"); |
| 3289 | sprintf (hexnumber, "%x", bintotal); |
| 3290 | mips_expect (hexnumber); |
| 3291 | return mips_expect_download (" bytes\r\n"); |
| 3292 | } |
| 3293 | |
| 3294 | /* Look for the termination messages associated with the end of |
| 3295 | a download to the board. |
| 3296 | |
| 3297 | Also, when `tftp_in_use' is set, issue the load command to the |
| 3298 | board causing the file to be transferred. (This is done prior |
| 3299 | to looking for the above mentioned termination messages.) */ |
| 3300 | |
| 3301 | static void |
| 3302 | pmon_end_download (int final, int bintotal) |
| 3303 | { |
| 3304 | char hexnumber[9]; /* Includes '\0' space. */ |
| 3305 | |
| 3306 | if (tftp_in_use) |
| 3307 | { |
| 3308 | static char *load_cmd_prefix = "load -b -s "; |
| 3309 | char *cmd; |
| 3310 | struct stat stbuf; |
| 3311 | |
| 3312 | /* Close off the temporary file containing the load data. */ |
| 3313 | fclose (tftp_file); |
| 3314 | tftp_file = NULL; |
| 3315 | |
| 3316 | /* Make the temporary file readable by the world. */ |
| 3317 | if (stat (tftp_localname, &stbuf) == 0) |
| 3318 | chmod (tftp_localname, stbuf.st_mode | S_IROTH); |
| 3319 | |
| 3320 | /* Must reinitialize the board to prevent PMON from crashing. */ |
| 3321 | if (mips_monitor != MON_ROCKHOPPER) |
| 3322 | mips_send_command ("initEther\r", -1); |
| 3323 | |
| 3324 | /* Send the load command. */ |
| 3325 | cmd = (char *) xmalloc (strlen (load_cmd_prefix) |
| 3326 | + strlen (tftp_name) + 2); |
| 3327 | strcpy (cmd, load_cmd_prefix); |
| 3328 | strcat (cmd, tftp_name); |
| 3329 | strcat (cmd, "\r"); |
| 3330 | mips_send_command (cmd, 0); |
| 3331 | xfree (cmd); |
| 3332 | if (!mips_expect_download ("Downloading from ")) |
| 3333 | return; |
| 3334 | if (!mips_expect_download (tftp_name)) |
| 3335 | return; |
| 3336 | if (!mips_expect_download (", ^C to abort\r\n")) |
| 3337 | return; |
| 3338 | } |
| 3339 | |
| 3340 | /* Wait for the stuff that PMON prints after the load has completed. |
| 3341 | The timeout value for use in the tftp case (15 seconds) was picked |
| 3342 | arbitrarily but might be too small for really large downloads. FIXME. */ |
| 3343 | switch (mips_monitor) |
| 3344 | { |
| 3345 | case MON_LSI: |
| 3346 | pmon_check_ack ("termination"); |
| 3347 | pmon_check_entry_address ("Entry address is ", final); |
| 3348 | if (!pmon_check_total (bintotal)) |
| 3349 | return; |
| 3350 | break; |
| 3351 | case MON_ROCKHOPPER: |
| 3352 | if (!pmon_check_total (bintotal)) |
| 3353 | return; |
| 3354 | pmon_check_entry_address ("Entry Address = ", final); |
| 3355 | break; |
| 3356 | default: |
| 3357 | pmon_check_entry_address ("Entry Address = ", final); |
| 3358 | pmon_check_ack ("termination"); |
| 3359 | if (!pmon_check_total (bintotal)) |
| 3360 | return; |
| 3361 | break; |
| 3362 | } |
| 3363 | |
| 3364 | if (tftp_in_use) |
| 3365 | remove (tftp_localname); /* Remove temporary file. */ |
| 3366 | } |
| 3367 | |
| 3368 | /* Write the buffer specified by BUFFER of length LENGTH to either |
| 3369 | the board or the temporary file that'll eventually be transferred |
| 3370 | to the board. */ |
| 3371 | |
| 3372 | static void |
| 3373 | pmon_download (char *buffer, int length) |
| 3374 | { |
| 3375 | if (tftp_in_use) |
| 3376 | { |
| 3377 | size_t written; |
| 3378 | |
| 3379 | written = fwrite (buffer, 1, length, tftp_file); |
| 3380 | if (written < length) |
| 3381 | perror_with_name (tftp_localname); |
| 3382 | } |
| 3383 | else |
| 3384 | serial_write (udp_in_use ? udp_desc : mips_desc, buffer, length); |
| 3385 | } |
| 3386 | |
| 3387 | /* Open object or executable file, FILE, and send it to the board |
| 3388 | using the FastLoad format. */ |
| 3389 | |
| 3390 | static void |
| 3391 | pmon_load_fast (const char *file) |
| 3392 | { |
| 3393 | bfd *abfd; |
| 3394 | asection *s; |
| 3395 | unsigned char *binbuf; |
| 3396 | char *buffer; |
| 3397 | int reclen; |
| 3398 | unsigned int csum = 0; |
| 3399 | int hashmark = !tftp_in_use; |
| 3400 | int bintotal = 0; |
| 3401 | int final = 0; |
| 3402 | int finished = 0; |
| 3403 | struct cleanup *cleanup; |
| 3404 | |
| 3405 | buffer = (char *) xmalloc (MAXRECSIZE + 1); |
| 3406 | binbuf = (unsigned char *) xmalloc (BINCHUNK); |
| 3407 | |
| 3408 | abfd = gdb_bfd_open (file, NULL, -1); |
| 3409 | if (!abfd) |
| 3410 | { |
| 3411 | printf_filtered ("Unable to open file %s\n", file); |
| 3412 | return; |
| 3413 | } |
| 3414 | cleanup = make_cleanup_bfd_unref (abfd); |
| 3415 | |
| 3416 | if (bfd_check_format (abfd, bfd_object) == 0) |
| 3417 | { |
| 3418 | printf_filtered ("File is not an object file\n"); |
| 3419 | do_cleanups (cleanup); |
| 3420 | return; |
| 3421 | } |
| 3422 | |
| 3423 | /* Setup the required download state: */ |
| 3424 | mips_send_command ("set dlproto etxack\r", -1); |
| 3425 | mips_send_command ("set dlecho off\r", -1); |
| 3426 | /* NOTE: We get a "cannot set variable" message if the variable is |
| 3427 | already defined to have the argument we give. The code doesn't |
| 3428 | care, since it just scans to the next prompt anyway. */ |
| 3429 | /* Start the download: */ |
| 3430 | pmon_start_download (); |
| 3431 | |
| 3432 | /* Zero the checksum. */ |
| 3433 | sprintf (buffer, "/Kxx\n"); |
| 3434 | reclen = strlen (buffer); |
| 3435 | pmon_download (buffer, reclen); |
| 3436 | finished = pmon_check_ack ("/Kxx"); |
| 3437 | |
| 3438 | for (s = abfd->sections; s && !finished; s = s->next) |
| 3439 | if (s->flags & SEC_LOAD) /* Only deal with loadable sections. */ |
| 3440 | { |
| 3441 | bintotal += bfd_get_section_size (s); |
| 3442 | final = (s->vma + bfd_get_section_size (s)); |
| 3443 | |
| 3444 | printf_filtered ("%s\t: 0x%4x .. 0x%4x ", s->name, |
| 3445 | (unsigned int) s->vma, |
| 3446 | (unsigned int) (s->vma + bfd_get_section_size (s))); |
| 3447 | gdb_flush (gdb_stdout); |
| 3448 | |
| 3449 | /* Output the starting address. */ |
| 3450 | sprintf (buffer, "/A"); |
| 3451 | reclen = pmon_makeb64 (s->vma, &buffer[2], 36, &csum); |
| 3452 | buffer[2 + reclen] = '\n'; |
| 3453 | buffer[3 + reclen] = '\0'; |
| 3454 | reclen += 3; /* For the initial escape code and carriage return. */ |
| 3455 | pmon_download (buffer, reclen); |
| 3456 | finished = pmon_check_ack ("/A"); |
| 3457 | |
| 3458 | if (!finished) |
| 3459 | { |
| 3460 | unsigned int binamount; |
| 3461 | unsigned int zerofill = 0; |
| 3462 | char *bp = buffer; |
| 3463 | unsigned int i; |
| 3464 | |
| 3465 | reclen = 0; |
| 3466 | |
| 3467 | for (i = 0; |
| 3468 | i < bfd_get_section_size (s) && !finished; |
| 3469 | i += binamount) |
| 3470 | { |
| 3471 | int binptr = 0; |
| 3472 | |
| 3473 | binamount = min (BINCHUNK, bfd_get_section_size (s) - i); |
| 3474 | |
| 3475 | bfd_get_section_contents (abfd, s, binbuf, i, binamount); |
| 3476 | |
| 3477 | /* This keeps a rolling checksum, until we decide to output |
| 3478 | the line: */ |
| 3479 | for (; ((binamount - binptr) > 0);) |
| 3480 | { |
| 3481 | pmon_make_fastrec (&bp, binbuf, &binptr, binamount, |
| 3482 | &reclen, &csum, &zerofill); |
| 3483 | if (reclen >= (MAXRECSIZE - CHECKSIZE)) |
| 3484 | { |
| 3485 | reclen = pmon_checkset (reclen, &bp, &csum); |
| 3486 | pmon_download (buffer, reclen); |
| 3487 | finished = pmon_check_ack ("data record"); |
| 3488 | if (finished) |
| 3489 | { |
| 3490 | zerofill = 0; /* Do not transmit pending |
| 3491 | zerofills. */ |
| 3492 | break; |
| 3493 | } |
| 3494 | |
| 3495 | if (deprecated_ui_load_progress_hook) |
| 3496 | deprecated_ui_load_progress_hook (s->name, i); |
| 3497 | |
| 3498 | if (hashmark) |
| 3499 | { |
| 3500 | putchar_unfiltered ('#'); |
| 3501 | gdb_flush (gdb_stdout); |
| 3502 | } |
| 3503 | |
| 3504 | bp = buffer; |
| 3505 | reclen = 0; /* buffer processed */ |
| 3506 | } |
| 3507 | } |
| 3508 | } |
| 3509 | |
| 3510 | /* Ensure no out-standing zerofill requests: */ |
| 3511 | if (zerofill != 0) |
| 3512 | reclen = pmon_zeroset (reclen, &bp, &zerofill, &csum); |
| 3513 | |
| 3514 | /* and then flush the line: */ |
| 3515 | if (reclen > 0) |
| 3516 | { |
| 3517 | reclen = pmon_checkset (reclen, &bp, &csum); |
| 3518 | /* Currently pmon_checkset outputs the line terminator by |
| 3519 | default, so we write out the buffer so far: */ |
| 3520 | pmon_download (buffer, reclen); |
| 3521 | finished = pmon_check_ack ("record remnant"); |
| 3522 | } |
| 3523 | } |
| 3524 | |
| 3525 | putchar_unfiltered ('\n'); |
| 3526 | } |
| 3527 | |
| 3528 | /* Terminate the transfer. We know that we have an empty output |
| 3529 | buffer at this point. */ |
| 3530 | sprintf (buffer, "/E/E\n"); /* Include dummy padding characters. */ |
| 3531 | reclen = strlen (buffer); |
| 3532 | pmon_download (buffer, reclen); |
| 3533 | |
| 3534 | if (finished) |
| 3535 | { /* Ignore the termination message: */ |
| 3536 | serial_flush_input (udp_in_use ? udp_desc : mips_desc); |
| 3537 | } |
| 3538 | else |
| 3539 | { /* Deal with termination message: */ |
| 3540 | pmon_end_download (final, bintotal); |
| 3541 | } |
| 3542 | |
| 3543 | do_cleanups (cleanup); |
| 3544 | return; |
| 3545 | } |
| 3546 | |
| 3547 | /* mips_load -- download a file. */ |
| 3548 | |
| 3549 | static void |
| 3550 | mips_load (struct target_ops *self, const char *file, int from_tty) |
| 3551 | { |
| 3552 | struct regcache *regcache; |
| 3553 | |
| 3554 | /* Get the board out of remote debugging mode. */ |
| 3555 | if (mips_exit_debug ()) |
| 3556 | error (_("mips_load: Couldn't get into monitor mode.")); |
| 3557 | |
| 3558 | if (mips_monitor != MON_IDT) |
| 3559 | pmon_load_fast (file); |
| 3560 | else |
| 3561 | mips_load_srec (file); |
| 3562 | |
| 3563 | mips_initialize (); |
| 3564 | |
| 3565 | /* Finally, make the PC point at the start address. */ |
| 3566 | regcache = get_current_regcache (); |
| 3567 | if (mips_monitor != MON_IDT) |
| 3568 | { |
| 3569 | /* Work around problem where PMON monitor updates the PC after a load |
| 3570 | to a different value than GDB thinks it has. The following ensures |
| 3571 | that the regcache_write_pc() WILL update the PC value: */ |
| 3572 | regcache_invalidate (regcache, |
| 3573 | mips_regnum (get_regcache_arch (regcache))->pc); |
| 3574 | } |
| 3575 | if (exec_bfd) |
| 3576 | regcache_write_pc (regcache, bfd_get_start_address (exec_bfd)); |
| 3577 | } |
| 3578 | |
| 3579 | /* Check to see if a thread is still alive. */ |
| 3580 | |
| 3581 | static int |
| 3582 | mips_thread_alive (struct target_ops *ops, ptid_t ptid) |
| 3583 | { |
| 3584 | if (ptid_equal (ptid, remote_mips_ptid)) |
| 3585 | /* The monitor's task is always alive. */ |
| 3586 | return 1; |
| 3587 | |
| 3588 | return 0; |
| 3589 | } |
| 3590 | |
| 3591 | /* Convert a thread ID to a string. Returns the string in a static |
| 3592 | buffer. */ |
| 3593 | |
| 3594 | static char * |
| 3595 | mips_pid_to_str (struct target_ops *ops, ptid_t ptid) |
| 3596 | { |
| 3597 | static char buf[64]; |
| 3598 | |
| 3599 | if (ptid_equal (ptid, remote_mips_ptid)) |
| 3600 | { |
| 3601 | xsnprintf (buf, sizeof buf, "Thread <main>"); |
| 3602 | return buf; |
| 3603 | } |
| 3604 | |
| 3605 | return normal_pid_to_str (ptid); |
| 3606 | } |
| 3607 | |
| 3608 | /* Pass the command argument as a packet to PMON verbatim. */ |
| 3609 | |
| 3610 | static void |
| 3611 | pmon_command (char *args, int from_tty) |
| 3612 | { |
| 3613 | char buf[DATA_MAXLEN + 1]; |
| 3614 | int rlen; |
| 3615 | |
| 3616 | sprintf (buf, "0x0 %s", args); |
| 3617 | mips_send_packet (buf, 1); |
| 3618 | printf_filtered ("Send packet: %s\n", buf); |
| 3619 | |
| 3620 | rlen = mips_receive_packet (buf, 1, mips_receive_wait); |
| 3621 | buf[rlen] = '\0'; |
| 3622 | printf_filtered ("Received packet: %s\n", buf); |
| 3623 | } |
| 3624 | \f |
| 3625 | /* -Wmissing-prototypes */ |
| 3626 | extern initialize_file_ftype _initialize_remote_mips; |
| 3627 | |
| 3628 | /* Initialize mips_ops, lsi_ops, ddb_ops, pmon_ops, and rockhopper_ops. |
| 3629 | Create target specific commands and perform other initializations |
| 3630 | specific to this file. */ |
| 3631 | |
| 3632 | void |
| 3633 | _initialize_remote_mips (void) |
| 3634 | { |
| 3635 | /* Initialize the fields in mips_ops that are common to all four targets. */ |
| 3636 | mips_ops.to_longname = "Remote MIPS debugging over serial line"; |
| 3637 | mips_ops.to_close = mips_close; |
| 3638 | mips_ops.to_detach = mips_detach; |
| 3639 | mips_ops.to_resume = mips_resume; |
| 3640 | mips_ops.to_fetch_registers = mips_fetch_registers; |
| 3641 | mips_ops.to_store_registers = mips_store_registers; |
| 3642 | mips_ops.to_prepare_to_store = mips_prepare_to_store; |
| 3643 | mips_ops.to_xfer_partial = mips_xfer_partial; |
| 3644 | mips_ops.to_files_info = mips_files_info; |
| 3645 | mips_ops.to_insert_breakpoint = mips_insert_breakpoint; |
| 3646 | mips_ops.to_remove_breakpoint = mips_remove_breakpoint; |
| 3647 | mips_ops.to_insert_watchpoint = mips_insert_watchpoint; |
| 3648 | mips_ops.to_remove_watchpoint = mips_remove_watchpoint; |
| 3649 | mips_ops.to_stopped_by_watchpoint = mips_stopped_by_watchpoint; |
| 3650 | mips_ops.to_can_use_hw_breakpoint = mips_can_use_watchpoint; |
| 3651 | mips_ops.to_kill = mips_kill; |
| 3652 | mips_ops.to_load = mips_load; |
| 3653 | mips_ops.to_create_inferior = mips_create_inferior; |
| 3654 | mips_ops.to_mourn_inferior = mips_mourn_inferior; |
| 3655 | mips_ops.to_thread_alive = mips_thread_alive; |
| 3656 | mips_ops.to_pid_to_str = mips_pid_to_str; |
| 3657 | mips_ops.to_log_command = serial_log_command; |
| 3658 | mips_ops.to_stratum = process_stratum; |
| 3659 | mips_ops.to_has_all_memory = default_child_has_all_memory; |
| 3660 | mips_ops.to_has_memory = default_child_has_memory; |
| 3661 | mips_ops.to_has_stack = default_child_has_stack; |
| 3662 | mips_ops.to_has_registers = default_child_has_registers; |
| 3663 | mips_ops.to_has_execution = default_child_has_execution; |
| 3664 | mips_ops.to_magic = OPS_MAGIC; |
| 3665 | |
| 3666 | /* Copy the common fields to all four target vectors. */ |
| 3667 | rockhopper_ops = pmon_ops = ddb_ops = lsi_ops = mips_ops; |
| 3668 | |
| 3669 | /* Initialize target-specific fields in the target vectors. */ |
| 3670 | mips_ops.to_shortname = "mips"; |
| 3671 | mips_ops.to_doc = "\ |
| 3672 | Debug a board using the MIPS remote debugging protocol over a serial line.\n\ |
| 3673 | The argument is the device it is connected to or, if it contains a colon,\n\ |
| 3674 | HOST:PORT to access a board over a network"; |
| 3675 | mips_ops.to_open = mips_open; |
| 3676 | mips_ops.to_wait = mips_wait; |
| 3677 | |
| 3678 | pmon_ops.to_shortname = "pmon"; |
| 3679 | pmon_ops.to_doc = "\ |
| 3680 | Debug a board using the PMON MIPS remote debugging protocol over a serial\n\ |
| 3681 | line. The argument is the device it is connected to or, if it contains a\n\ |
| 3682 | colon, HOST:PORT to access a board over a network"; |
| 3683 | pmon_ops.to_open = pmon_open; |
| 3684 | pmon_ops.to_wait = mips_wait; |
| 3685 | |
| 3686 | ddb_ops.to_shortname = "ddb"; |
| 3687 | ddb_ops.to_doc = "\ |
| 3688 | Debug a board using the PMON MIPS remote debugging protocol over a serial\n\ |
| 3689 | line. The first argument is the device it is connected to or, if it contains\n\ |
| 3690 | a colon, HOST:PORT to access a board over a network. The optional second\n\ |
| 3691 | parameter is the temporary file in the form HOST:FILENAME to be used for\n\ |
| 3692 | TFTP downloads to the board. The optional third parameter is the local name\n\ |
| 3693 | of the TFTP temporary file, if it differs from the filename seen by the board."; |
| 3694 | ddb_ops.to_open = ddb_open; |
| 3695 | ddb_ops.to_wait = mips_wait; |
| 3696 | |
| 3697 | rockhopper_ops.to_shortname = "rockhopper"; |
| 3698 | rockhopper_ops.to_doc = ddb_ops.to_doc; |
| 3699 | rockhopper_ops.to_open = rockhopper_open; |
| 3700 | rockhopper_ops.to_wait = mips_wait; |
| 3701 | |
| 3702 | lsi_ops.to_shortname = "lsi"; |
| 3703 | lsi_ops.to_doc = pmon_ops.to_doc; |
| 3704 | lsi_ops.to_open = lsi_open; |
| 3705 | lsi_ops.to_wait = mips_wait; |
| 3706 | |
| 3707 | /* Add the targets. */ |
| 3708 | add_target (&mips_ops); |
| 3709 | add_target (&pmon_ops); |
| 3710 | add_target (&ddb_ops); |
| 3711 | add_target (&lsi_ops); |
| 3712 | add_target (&rockhopper_ops); |
| 3713 | |
| 3714 | add_setshow_zinteger_cmd ("timeout", no_class, &mips_receive_wait, _("\ |
| 3715 | Set timeout in seconds for remote MIPS serial I/O."), _("\ |
| 3716 | Show timeout in seconds for remote MIPS serial I/O."), NULL, |
| 3717 | NULL, |
| 3718 | NULL, /* FIXME: i18n: */ |
| 3719 | &setlist, &showlist); |
| 3720 | |
| 3721 | add_setshow_zinteger_cmd ("retransmit-timeout", no_class, |
| 3722 | &mips_retransmit_wait, _("\ |
| 3723 | Set retransmit timeout in seconds for remote MIPS serial I/O."), _("\ |
| 3724 | Show retransmit timeout in seconds for remote MIPS serial I/O."), _("\ |
| 3725 | This is the number of seconds to wait for an acknowledgement to a packet\n\ |
| 3726 | before resending the packet."), |
| 3727 | NULL, |
| 3728 | NULL, /* FIXME: i18n: */ |
| 3729 | &setlist, &showlist); |
| 3730 | |
| 3731 | add_setshow_zinteger_cmd ("syn-garbage-limit", no_class, |
| 3732 | &mips_syn_garbage, _("\ |
| 3733 | Set the maximum number of characters to ignore when scanning for a SYN."), _("\ |
| 3734 | Show the maximum number of characters to ignore when scanning for a SYN."), _("\ |
| 3735 | This is the maximum number of characters GDB will ignore when trying to\n\ |
| 3736 | synchronize with the remote system. A value of -1 means that there is no\n\ |
| 3737 | limit. (Note that these characters are printed out even though they are\n\ |
| 3738 | ignored.)"), |
| 3739 | NULL, |
| 3740 | NULL, /* FIXME: i18n: */ |
| 3741 | &setlist, &showlist); |
| 3742 | |
| 3743 | add_setshow_string_cmd ("monitor-prompt", class_obscure, |
| 3744 | &mips_monitor_prompt, _("\ |
| 3745 | Set the prompt that GDB expects from the monitor."), _("\ |
| 3746 | Show the prompt that GDB expects from the monitor."), NULL, |
| 3747 | NULL, |
| 3748 | NULL, /* FIXME: i18n: */ |
| 3749 | &setlist, &showlist); |
| 3750 | |
| 3751 | add_setshow_zinteger_cmd ("monitor-warnings", class_obscure, |
| 3752 | &monitor_warnings, _("\ |
| 3753 | Set printing of monitor warnings."), _("\ |
| 3754 | Show printing of monitor warnings."), _("\ |
| 3755 | When enabled, monitor warnings about hardware breakpoints will be displayed."), |
| 3756 | NULL, |
| 3757 | NULL, /* FIXME: i18n: */ |
| 3758 | &setlist, &showlist); |
| 3759 | |
| 3760 | add_com ("pmon", class_obscure, pmon_command, |
| 3761 | _("Send a packet to PMON (must be in debug mode).")); |
| 3762 | |
| 3763 | add_setshow_boolean_cmd ("mask-address", no_class, &mask_address_p, _("\ |
| 3764 | Set zeroing of upper 32 bits of 64-bit addresses when talking to PMON targets."), _("\ |
| 3765 | Show zeroing of upper 32 bits of 64-bit addresses when talking to PMON targets."), _("\ |
| 3766 | Use \"on\" to enable the masking and \"off\" to disable it."), |
| 3767 | NULL, |
| 3768 | NULL, /* FIXME: i18n: */ |
| 3769 | &setlist, &showlist); |
| 3770 | remote_mips_ptid = ptid_build (42000, 0, 42000); |
| 3771 | } |