sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 1 | /* Main code for remote server for GDB. |
| 2 | Copyright (C) 1989, 1993, 1994, 1995, 1997, 1998, 1999, 2000, 2002, 2003, |
| 3 | 2004, 2005, 2006, 2011 |
| 4 | Free Software Foundation, Inc. |
| 5 | |
| 6 | This file is part of GDB. |
| 7 | It has been modified to integrate it in valgrind |
| 8 | |
| 9 | This program is free software; you can redistribute it and/or modify |
| 10 | it under the terms of the GNU General Public License as published by |
| 11 | the Free Software Foundation; either version 2 of the License, or |
| 12 | (at your option) any later version. |
| 13 | |
| 14 | This program is distributed in the hope that it will be useful, |
| 15 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | GNU General Public License for more details. |
| 18 | |
| 19 | You should have received a copy of the GNU General Public License |
| 20 | along with this program; if not, write to the Free Software |
| 21 | Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| 22 | Boston, MA 02110-1301, USA. */ |
| 23 | |
| 24 | #include "server.h" |
| 25 | #include "regdef.h" |
| 26 | #include "pub_core_options.h" |
| 27 | #include "pub_core_translate.h" |
| 28 | #include "pub_core_mallocfree.h" |
sewardj | 2a31239 | 2011-06-26 09:26:48 +0000 | [diff] [blame] | 29 | #include "pub_core_initimg.h" |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 30 | |
| 31 | unsigned long cont_thread; |
| 32 | unsigned long general_thread; |
| 33 | unsigned long step_thread; |
| 34 | unsigned long thread_from_wait; |
| 35 | unsigned long old_thread_from_wait; |
| 36 | |
philippe | 886fde3 | 2012-03-29 21:56:47 +0000 | [diff] [blame] | 37 | int pass_signals[TARGET_SIGNAL_LAST]; /* indexed by gdb signal nr */ |
bart | 2dafc54 | 2011-05-18 16:08:28 +0000 | [diff] [blame] | 38 | |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 39 | /* for a gdbserver integrated in valgrind, resuming the process consists |
| 40 | in returning the control to valgrind. |
philippe | 349a391 | 2012-05-23 21:50:36 +0000 | [diff] [blame] | 41 | The guess process resumes its execution. |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 42 | Then at the next error or break or ..., valgrind calls gdbserver again. |
philippe | 349a391 | 2012-05-23 21:50:36 +0000 | [diff] [blame] | 43 | A resume reply packet must then be built to inform GDB that the |
| 44 | resume request is finished. |
| 45 | resume_reply_packet_needed records the fact that the next call to gdbserver |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 46 | must send a resume packet to gdb. */ |
philippe | 349a391 | 2012-05-23 21:50:36 +0000 | [diff] [blame] | 47 | static Bool resume_reply_packet_needed = False; |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 48 | |
| 49 | VG_MINIMAL_JMP_BUF(toplevel); |
| 50 | |
| 51 | /* Decode a qXfer read request. Return 0 if everything looks OK, |
| 52 | or -1 otherwise. */ |
| 53 | |
| 54 | static |
| 55 | int decode_xfer_read (char *buf, char **annex, CORE_ADDR *ofs, unsigned int *len) |
| 56 | { |
| 57 | /* Extract and NUL-terminate the annex. */ |
| 58 | *annex = buf; |
| 59 | while (*buf && *buf != ':') |
| 60 | buf++; |
| 61 | if (*buf == '\0') |
| 62 | return -1; |
| 63 | *buf++ = 0; |
| 64 | |
| 65 | /* After the read/write marker and annex, qXfer looks like a |
| 66 | traditional 'm' packet. */ |
| 67 | decode_m_packet (buf, ofs, len); |
| 68 | |
| 69 | return 0; |
| 70 | } |
| 71 | |
| 72 | /* Write the response to a successful qXfer read. Returns the |
| 73 | length of the (binary) data stored in BUF, corresponding |
| 74 | to as much of DATA/LEN as we could fit. IS_MORE controls |
| 75 | the first character of the response. */ |
| 76 | static |
| 77 | int write_qxfer_response (char *buf, unsigned char *data, int len, int is_more) |
| 78 | { |
| 79 | int out_len; |
| 80 | |
| 81 | if (is_more) |
| 82 | buf[0] = 'm'; |
| 83 | else |
| 84 | buf[0] = 'l'; |
| 85 | |
| 86 | return remote_escape_output (data, len, (unsigned char *) buf + 1, &out_len, |
| 87 | PBUFSIZ - POVERHSIZ - 1) + 1; |
| 88 | } |
| 89 | |
| 90 | static Bool initial_valgrind_sink_saved = False; |
| 91 | /* True <=> valgrind log sink saved in initial_valgrind_sink */ |
| 92 | static OutputSink initial_valgrind_sink; |
| 93 | |
| 94 | static Bool command_output_to_log = False; |
| 95 | /* True <=> command output goes to log instead of gdb */ |
| 96 | |
| 97 | void reset_valgrind_sink(char *info) |
| 98 | { |
| 99 | if (VG_(log_output_sink).fd != initial_valgrind_sink.fd |
| 100 | && initial_valgrind_sink_saved) { |
| 101 | VG_(log_output_sink).fd = initial_valgrind_sink.fd; |
| 102 | VG_(umsg) ("Reset valgrind output to log (%s)\n", |
| 103 | (info = NULL ? "" : info)); |
| 104 | } |
| 105 | } |
| 106 | |
| 107 | static |
| 108 | void kill_request (char *msg) |
| 109 | { |
| 110 | VG_(umsg) ("%s", msg); |
| 111 | remote_close(); |
| 112 | VG_(exit) (0); |
| 113 | } |
| 114 | |
| 115 | /* handle_gdb_valgrind_command handles the provided mon string command. |
| 116 | If command is recognised, return 1 else return 0. |
| 117 | Note that in case of ambiguous command, 1 is returned. |
| 118 | |
| 119 | *sink_wanted_at_return is modified if one of the commands |
sewardj | 30b3eca | 2011-06-28 08:20:39 +0000 | [diff] [blame] | 120 | 'v.set *_output' is handled. |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 121 | */ |
| 122 | static |
| 123 | int handle_gdb_valgrind_command (char* mon, OutputSink* sink_wanted_at_return) |
| 124 | { |
| 125 | UWord ret = 0; |
| 126 | char s[strlen(mon)+1]; /* copy for strtok_r */ |
| 127 | char* wcmd; |
| 128 | Char* ssaveptr; |
| 129 | char* endptr; |
| 130 | int kwdid; |
| 131 | int int_value; |
| 132 | |
| 133 | vg_assert (initial_valgrind_sink_saved); |
| 134 | |
| 135 | strcpy (s, mon); |
| 136 | wcmd = strtok_r (s, " ", &ssaveptr); |
| 137 | /* NB: if possible, avoid introducing a new command below which |
sewardj | 30b3eca | 2011-06-28 08:20:39 +0000 | [diff] [blame] | 138 | starts with the same 3 first letters as an already existing |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 139 | command. This ensures a shorter abbreviation for the user. */ |
sewardj | 30b3eca | 2011-06-28 08:20:39 +0000 | [diff] [blame] | 140 | switch (VG_(keyword_id) ("help v.set v.info v.wait v.kill v.translate", |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 141 | wcmd, kwd_report_duplicated_matches)) { |
| 142 | case -2: |
| 143 | ret = 1; |
| 144 | break; |
| 145 | case -1: |
| 146 | break; |
| 147 | case 0: /* help */ |
| 148 | ret = 1; |
| 149 | wcmd = strtok_r (NULL, " ", &ssaveptr); |
| 150 | if (wcmd == NULL) { |
| 151 | int_value = 0; |
| 152 | } else { |
| 153 | switch (VG_(keyword_id) ("debug", wcmd, kwd_report_all)) { |
| 154 | case -2: int_value = 0; break; |
| 155 | case -1: int_value = 0; break; |
| 156 | case 0: int_value = 1; break; |
| 157 | default: tl_assert (0); |
| 158 | } |
| 159 | } |
| 160 | |
| 161 | VG_(gdb_printf) ( |
| 162 | "general valgrind monitor commands:\n" |
| 163 | " help [debug] : monitor command help. With debug: + debugging commands\n" |
sewardj | 30b3eca | 2011-06-28 08:20:39 +0000 | [diff] [blame] | 164 | " v.wait [<ms>] : sleep <ms> (default 0) then continue\n" |
| 165 | " v.info all_errors : show all errors found so far\n" |
| 166 | " v.info last_error : show last error found\n" |
| 167 | " v.info n_errs_found : show the nr of errors found so far\n" |
| 168 | " v.kill : kill the Valgrind process\n" |
| 169 | " v.set gdb_output : set valgrind output to gdb\n" |
| 170 | " v.set log_output : set valgrind output to log\n" |
| 171 | " v.set mixed_output : set valgrind output to log, interactive output to gdb\n" |
| 172 | " v.set vgdb-error <errornr> : debug me at error >= <errornr> \n"); |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 173 | if (int_value) { VG_(gdb_printf) ( |
| 174 | "debugging valgrind internals monitor commands:\n" |
sewardj | 30b3eca | 2011-06-28 08:20:39 +0000 | [diff] [blame] | 175 | " v.info gdbserver_status : show gdbserver status\n" |
philippe | 93a6a8d | 2012-04-27 22:59:43 +0000 | [diff] [blame] | 176 | " v.info memory [aspacemgr] : show valgrind heap memory stats\n" |
| 177 | " (with aspacemgr arg, also shows valgrind segments on log ouput)\n" |
sewardj | d6e13d8 | 2011-10-22 20:23:30 +0000 | [diff] [blame] | 178 | " v.info scheduler : show valgrind thread state and stacktrace\n" |
sewardj | 30b3eca | 2011-06-28 08:20:39 +0000 | [diff] [blame] | 179 | " v.set debuglog <level> : set valgrind debug log level to <level>\n" |
| 180 | " v.translate <addr> [<traceflags>] : debug translation of <addr> with <traceflags>\n" |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 181 | " (default traceflags 0b00100000 : show after instrumentation)\n" |
| 182 | " An additional flag 0b100000000 allows to show gdbserver instrumentation\n"); |
| 183 | } |
| 184 | break; |
sewardj | 30b3eca | 2011-06-28 08:20:39 +0000 | [diff] [blame] | 185 | case 1: /* v.set */ |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 186 | ret = 1; |
| 187 | wcmd = strtok_r (NULL, " ", &ssaveptr); |
| 188 | switch (kwdid = VG_(keyword_id) |
| 189 | ("vgdb-error debuglog gdb_output log_output mixed_output", |
| 190 | wcmd, kwd_report_all)) { |
| 191 | case -2: |
| 192 | case -1: |
| 193 | break; |
| 194 | case 0: /* vgdb-error */ |
| 195 | case 1: /* debuglog */ |
| 196 | wcmd = strtok_r (NULL, " ", &ssaveptr); |
| 197 | if (wcmd == NULL) { |
| 198 | int_value = 0; |
| 199 | endptr = "empty"; /* to report an error below */ |
| 200 | } else { |
| 201 | int_value = strtol (wcmd, &endptr, 10); |
| 202 | } |
| 203 | if (*endptr != '\0') { |
| 204 | VG_(gdb_printf) ("missing or malformed integer value\n"); |
| 205 | } else if (kwdid == 0) { |
| 206 | VG_(gdb_printf) ("vgdb-error value changed from %d to %d\n", |
| 207 | VG_(dyn_vgdb_error), int_value); |
| 208 | VG_(dyn_vgdb_error) = int_value; |
| 209 | } else if (kwdid == 1) { |
| 210 | VG_(gdb_printf) ("debuglog value changed from %d to %d\n", |
| 211 | VG_(debugLog_getLevel)(), int_value); |
| 212 | VG_(debugLog_startup) (int_value, "gdbsrv"); |
| 213 | } else { |
| 214 | vg_assert (0); |
| 215 | } |
| 216 | break; |
| 217 | case 2: /* gdb_output */ |
| 218 | (*sink_wanted_at_return).fd = -2; |
| 219 | command_output_to_log = False; |
| 220 | VG_(gdb_printf) ("valgrind output will go to gdb\n"); |
| 221 | break; |
| 222 | case 3: /* log_output */ |
| 223 | (*sink_wanted_at_return).fd = initial_valgrind_sink.fd; |
| 224 | command_output_to_log = True; |
| 225 | VG_(gdb_printf) ("valgrind output will go to log\n"); |
| 226 | break; |
| 227 | case 4: /* mixed output */ |
| 228 | (*sink_wanted_at_return).fd = initial_valgrind_sink.fd; |
| 229 | command_output_to_log = False; |
| 230 | VG_(gdb_printf) |
| 231 | ("valgrind output will go to log, interactive output will go to gdb\n"); |
| 232 | break; |
| 233 | default: |
| 234 | vg_assert (0); |
| 235 | } |
| 236 | break; |
sewardj | 30b3eca | 2011-06-28 08:20:39 +0000 | [diff] [blame] | 237 | case 2: /* v.info */ { |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 238 | ret = 1; |
| 239 | wcmd = strtok_r (NULL, " ", &ssaveptr); |
| 240 | switch (kwdid = VG_(keyword_id) |
sewardj | d6e13d8 | 2011-10-22 20:23:30 +0000 | [diff] [blame] | 241 | ("all_errors n_errs_found last_error gdbserver_status memory" |
| 242 | " scheduler", |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 243 | wcmd, kwd_report_all)) { |
| 244 | case -2: |
| 245 | case -1: |
| 246 | break; |
| 247 | case 0: // all_errors |
| 248 | // A verbosity of minimum 2 is needed to show the errors. |
| 249 | VG_(show_all_errors)(/* verbosity */ 2, /* xml */ False); |
| 250 | break; |
| 251 | case 1: // n_errs_found |
philippe | baf6964 | 2012-02-15 22:29:30 +0000 | [diff] [blame] | 252 | VG_(gdb_printf) ("n_errs_found %d n_errs_shown %d (vgdb-error %d)\n", |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 253 | VG_(get_n_errs_found) (), |
philippe | baf6964 | 2012-02-15 22:29:30 +0000 | [diff] [blame] | 254 | VG_(get_n_errs_shown) (), |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 255 | VG_(dyn_vgdb_error)); |
| 256 | break; |
| 257 | case 2: // last_error |
| 258 | VG_(show_last_error)(); |
| 259 | break; |
| 260 | case 3: // gdbserver_status |
| 261 | VG_(gdbserver_status_output)(); |
| 262 | break; |
| 263 | case 4: /* memory */ |
| 264 | VG_(print_all_arena_stats) (); |
| 265 | if (VG_(clo_profile_heap)) |
| 266 | VG_(print_arena_cc_analysis) (); |
philippe | 93a6a8d | 2012-04-27 22:59:43 +0000 | [diff] [blame] | 267 | wcmd = strtok_r (NULL, " ", &ssaveptr); |
| 268 | if (wcmd != NULL) { |
| 269 | switch (VG_(keyword_id) ("aspacemgr", wcmd, kwd_report_all)) { |
| 270 | case -2: |
| 271 | case -1: break; |
| 272 | case 0: |
| 273 | VG_(am_show_nsegments) (0, "gdbserver v.info memory aspacemgr"); |
| 274 | break; |
| 275 | default: tl_assert (0); |
| 276 | } |
| 277 | } |
| 278 | |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 279 | ret = 1; |
| 280 | break; |
sewardj | d6e13d8 | 2011-10-22 20:23:30 +0000 | [diff] [blame] | 281 | case 5: /* scheduler */ |
| 282 | VG_(show_sched_status) (); |
| 283 | ret = 1; |
| 284 | break; |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 285 | default: |
| 286 | vg_assert(0); |
| 287 | } |
| 288 | break; |
| 289 | } |
sewardj | 30b3eca | 2011-06-28 08:20:39 +0000 | [diff] [blame] | 290 | case 3: /* v.wait */ |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 291 | wcmd = strtok_r (NULL, " ", &ssaveptr); |
| 292 | if (wcmd != NULL) { |
| 293 | int_value = strtol (wcmd, &endptr, 10); |
| 294 | VG_(gdb_printf) ("gdbserver: continuing in %d ms ...\n", int_value); |
| 295 | VG_(poll)(NULL, 0, int_value); |
| 296 | } |
| 297 | VG_(gdb_printf) ("gdbserver: continuing after wait ...\n"); |
| 298 | ret = 1; |
| 299 | break; |
sewardj | 30b3eca | 2011-06-28 08:20:39 +0000 | [diff] [blame] | 300 | case 4: /* v.kill */ |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 301 | kill_request ("monitor command request to kill this process\n"); |
| 302 | break; |
sewardj | 30b3eca | 2011-06-28 08:20:39 +0000 | [diff] [blame] | 303 | case 5: { /* v.translate */ |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 304 | Addr address; |
| 305 | SizeT verbosity = 0x20; |
| 306 | |
| 307 | ret = 1; |
| 308 | |
| 309 | VG_(strtok_get_address_and_size) (&address, &verbosity, &ssaveptr); |
| 310 | if (address != (Addr) 0 || verbosity != 0) { |
| 311 | /* we need to force the output to log for the translation trace, |
| 312 | as low level VEX tracing cannot be redirected to gdb. */ |
| 313 | int saved_command_output_to_log = command_output_to_log; |
| 314 | int saved_fd = VG_(log_output_sink).fd; |
| 315 | Bool single_stepping_on_entry = valgrind_single_stepping(); |
| 316 | int vex_verbosity = verbosity & 0xff; |
| 317 | VG_(log_output_sink).fd = initial_valgrind_sink.fd; |
| 318 | if ((verbosity & 0x100) && !single_stepping_on_entry) { |
| 319 | valgrind_set_single_stepping(True); |
| 320 | // to force gdbserver instrumentation. |
| 321 | } |
sewardj | 99d6134 | 2011-05-17 16:35:11 +0000 | [diff] [blame] | 322 | # if defined(VGA_arm) |
| 323 | // on arm, we need to (potentially) convert this address |
| 324 | // to the thumb form. |
| 325 | address = thumb_pc (address); |
| 326 | # endif |
| 327 | |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 328 | VG_(translate) ( 0 /* dummy ThreadId; irrelevant due to debugging*/, |
| 329 | address, |
| 330 | /*debugging*/True, |
| 331 | (Int) vex_verbosity, |
| 332 | /*bbs_done*/0, |
| 333 | /*allow redir?*/True); |
| 334 | if ((verbosity & 0x100) && !single_stepping_on_entry) { |
| 335 | valgrind_set_single_stepping(False); |
| 336 | // reset single stepping. |
| 337 | } |
| 338 | command_output_to_log = saved_command_output_to_log; |
| 339 | VG_(log_output_sink).fd = saved_fd; |
| 340 | } |
| 341 | break; |
| 342 | } |
| 343 | |
| 344 | default: |
| 345 | vg_assert (0); |
| 346 | } |
| 347 | return ret; |
| 348 | } |
| 349 | |
| 350 | /* handle_gdb_monitor_command handles the provided mon string command, |
| 351 | which can be either a "standard" valgrind monitor command |
| 352 | or a tool specific monitor command. |
| 353 | If command recognised, return 1 else return 0. |
| 354 | Note that in case of ambiguous command, 1 is returned. |
| 355 | */ |
| 356 | static |
| 357 | int handle_gdb_monitor_command (char* mon) |
| 358 | { |
| 359 | UWord ret = 0; |
| 360 | UWord tool_ret = 0; |
| 361 | // initially, we assume that when returning, the desired sink is the |
| 362 | // one we have when entering. It can however be changed by the standard |
| 363 | // valgrind command handling. |
| 364 | OutputSink sink_wanted_at_return = VG_(log_output_sink); |
| 365 | |
| 366 | if (!initial_valgrind_sink_saved) { |
| 367 | /* first time we enter here, we save the valgrind default log sink */ |
| 368 | initial_valgrind_sink = sink_wanted_at_return; |
| 369 | initial_valgrind_sink_saved = True; |
| 370 | } |
| 371 | |
| 372 | if (!command_output_to_log) |
| 373 | VG_(log_output_sink).fd = -2; /* redirect to monitor_output */ |
| 374 | |
| 375 | ret = handle_gdb_valgrind_command (mon, &sink_wanted_at_return); |
| 376 | |
| 377 | /* Even if command was recognised by valgrind core, we call the |
| 378 | tool command handler : this is needed to handle help command |
| 379 | and/or to let the tool do some additional processing of a |
| 380 | valgrind standard command. Note however that if valgrind |
| 381 | recognised the command, we will always return success. */ |
| 382 | if (VG_(needs).client_requests) { |
| 383 | /* If the tool reports an error when handling a monitor command, |
| 384 | we need to avoid calling gdbserver during this command |
| 385 | handling. So, we temporarily set VG_(dyn_vgdb_error) to |
| 386 | a huge value to ensure m_errormgr.c does not call gdbserver. */ |
| 387 | Int save_dyn_vgdb_error = VG_(dyn_vgdb_error); |
| 388 | UWord arg[2]; |
| 389 | VG_(dyn_vgdb_error) = 999999999; |
| 390 | arg[0] = (UWord) VG_USERREQ__GDB_MONITOR_COMMAND; |
| 391 | arg[1] = (UWord) mon; |
| 392 | VG_TDICT_CALL(tool_handle_client_request, VG_(running_tid), arg, |
| 393 | &tool_ret); |
| 394 | VG_(dyn_vgdb_error) = save_dyn_vgdb_error; |
| 395 | } |
| 396 | |
| 397 | /* restore or set the desired output */ |
| 398 | VG_(log_output_sink).fd = sink_wanted_at_return.fd; |
| 399 | if (ret | tool_ret) |
| 400 | return 1; |
| 401 | else |
| 402 | return 0; |
| 403 | } |
| 404 | |
| 405 | |
| 406 | /* Handle all of the extended 'Q' packets. */ |
| 407 | static |
| 408 | void handle_set (char *arg_own_buf, int *new_packet_len_p) |
| 409 | { |
| 410 | if (strcmp ("QStartNoAckMode", arg_own_buf) == 0) { |
| 411 | noack_mode = True; |
| 412 | write_ok (arg_own_buf); |
| 413 | return; |
| 414 | } |
| 415 | |
| 416 | if (strncmp ("QPassSignals:", arg_own_buf, 13) == 0) { |
| 417 | int i; |
| 418 | char *from, *to; |
| 419 | char *end = arg_own_buf + strlen(arg_own_buf); |
| 420 | CORE_ADDR sig; |
| 421 | for (i = 0; i < TARGET_SIGNAL_LAST; i++) |
| 422 | pass_signals[i] = 0; |
| 423 | |
| 424 | from = arg_own_buf + 13; |
| 425 | while (from < end) { |
| 426 | to = strchr(from, ';'); |
| 427 | if (to == NULL) to = end; |
| 428 | decode_address (&sig, from, to - from); |
| 429 | pass_signals[(int)sig] = 1; |
philippe | 886fde3 | 2012-03-29 21:56:47 +0000 | [diff] [blame] | 430 | dlog(1, "pass_signal gdb_nr %d %s\n", |
| 431 | (int)sig, target_signal_to_name(sig)); |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 432 | from = to; |
| 433 | if (*from == ';') from++; |
| 434 | } |
| 435 | write_ok (arg_own_buf); |
| 436 | return; |
| 437 | } |
| 438 | /* Otherwise we didn't know what packet it was. Say we didn't |
| 439 | understand it. */ |
| 440 | arg_own_buf[0] = 0; |
| 441 | } |
| 442 | |
| 443 | /* Handle all of the extended 'q' packets. */ |
| 444 | static |
| 445 | void handle_query (char *arg_own_buf, int *new_packet_len_p) |
| 446 | { |
| 447 | static struct inferior_list_entry *thread_ptr; |
| 448 | |
| 449 | /* qRcmd, monitor command handling. */ |
| 450 | if (strncmp ("qRcmd,", arg_own_buf, 6) == 0) { |
| 451 | char *p = arg_own_buf + 6; |
| 452 | int cmdlen = strlen(p)/2; |
| 453 | char cmd[cmdlen+1]; |
| 454 | |
| 455 | if (unhexify (cmd, p, cmdlen) != cmdlen) { |
| 456 | write_enn (arg_own_buf); |
| 457 | return; |
| 458 | } |
| 459 | cmd[cmdlen] = '\0'; |
| 460 | |
| 461 | if (handle_gdb_monitor_command (cmd)) { |
| 462 | /* In case the command is from a standalone vgdb, |
| 463 | connection will be closed soon => flush the output. */ |
| 464 | VG_(message_flush) (); |
| 465 | write_ok (arg_own_buf); |
| 466 | return; |
| 467 | } else { |
| 468 | /* cmd not recognised */ |
| 469 | VG_(gdb_printf) |
| 470 | ("command '%s' not recognised\n" |
| 471 | "In gdb, try 'monitor help'\n" |
| 472 | "In a shell, try 'vgdb help'\n", |
| 473 | cmd); |
| 474 | write_ok (arg_own_buf); |
| 475 | return; |
| 476 | } |
| 477 | } |
| 478 | |
| 479 | /* provide some valgrind specific info in return to qThreadExtraInfo. */ |
| 480 | if (strncmp ("qThreadExtraInfo,", arg_own_buf, 17) == 0) { |
| 481 | unsigned long gdb_id; |
| 482 | struct thread_info *ti; |
| 483 | ThreadState *tst; |
| 484 | char status[100]; |
| 485 | |
| 486 | gdb_id = strtoul (&arg_own_buf[17], NULL, 16); |
| 487 | ti = gdb_id_to_thread (gdb_id); |
| 488 | if (ti != NULL) { |
| 489 | tst = (ThreadState *) inferior_target_data (ti); |
| 490 | /* Additional info is the tid and the thread status. */ |
| 491 | VG_(snprintf) (status, sizeof(status), "tid %d %s", |
| 492 | tst->tid, |
| 493 | VG_(name_of_ThreadStatus)(tst->status)); |
| 494 | hexify (arg_own_buf, status, strlen(status)); |
| 495 | return; |
| 496 | } else { |
| 497 | write_enn (arg_own_buf); |
| 498 | return; |
| 499 | } |
| 500 | } |
| 501 | |
| 502 | if (strcmp ("qAttached", arg_own_buf) == 0) { |
| 503 | /* tell gdb to always detach, never kill the process */ |
| 504 | arg_own_buf[0] = '1'; |
| 505 | arg_own_buf[1] = 0; |
| 506 | return; |
| 507 | } |
| 508 | |
| 509 | if (strcmp ("qSymbol::", arg_own_buf) == 0) { |
| 510 | /* We have no symbol to read. */ |
| 511 | write_ok (arg_own_buf); |
| 512 | return; |
| 513 | } |
| 514 | |
| 515 | if (strcmp ("qfThreadInfo", arg_own_buf) == 0) { |
| 516 | thread_ptr = all_threads.head; |
| 517 | VG_(sprintf) (arg_own_buf, "m%x", |
| 518 | thread_to_gdb_id ((struct thread_info *)thread_ptr)); |
| 519 | thread_ptr = thread_ptr->next; |
| 520 | return; |
| 521 | } |
| 522 | |
| 523 | if (strcmp ("qsThreadInfo", arg_own_buf) == 0) { |
| 524 | if (thread_ptr != NULL) { |
| 525 | VG_(sprintf) (arg_own_buf, "m%x", |
| 526 | thread_to_gdb_id ((struct thread_info *)thread_ptr)); |
| 527 | thread_ptr = thread_ptr->next; |
| 528 | return; |
| 529 | } else { |
| 530 | VG_(sprintf) (arg_own_buf, "l"); |
| 531 | return; |
| 532 | } |
| 533 | } |
| 534 | |
philippe | 419d5f2 | 2012-05-24 21:33:17 +0000 | [diff] [blame] | 535 | if (valgrind_target_xml(VG_(clo_vgdb_shadow_registers)) != NULL |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 536 | && strncmp ("qXfer:features:read:", arg_own_buf, 20) == 0) { |
| 537 | CORE_ADDR ofs; |
| 538 | unsigned int len, doc_len; |
| 539 | char *annex = NULL; |
| 540 | // First, the annex is extracted from the packet received. |
| 541 | // Then, it is replaced by the corresponding file name. |
| 542 | int fd; |
| 543 | |
| 544 | /* Grab the annex, offset, and length. */ |
| 545 | if (decode_xfer_read (arg_own_buf + 20, &annex, &ofs, &len) < 0) { |
| 546 | strcpy (arg_own_buf, "E00"); |
| 547 | return; |
| 548 | } |
| 549 | |
| 550 | if (strcmp (annex, "target.xml") == 0) { |
philippe | 419d5f2 | 2012-05-24 21:33:17 +0000 | [diff] [blame] | 551 | annex = valgrind_target_xml(VG_(clo_vgdb_shadow_registers)); |
| 552 | if (annex != NULL && VG_(clo_vgdb_shadow_registers)) { |
| 553 | /* Ensure the shadow registers are initialized. */ |
| 554 | initialize_shadow_low(True); |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 555 | } |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 556 | if (annex == NULL) { |
| 557 | strcpy (arg_own_buf, "E00"); |
| 558 | return; |
| 559 | } |
| 560 | } |
| 561 | |
| 562 | { |
philippe | 75a5f78 | 2012-02-24 11:25:58 +0000 | [diff] [blame] | 563 | char doc[VG_(strlen)(VG_(libdir)) + 1 + VG_(strlen)(annex) + 1]; |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 564 | struct vg_stat stat_doc; |
| 565 | char toread[len]; |
| 566 | int len_read; |
| 567 | |
| 568 | VG_(sprintf)(doc, "%s/%s", VG_(libdir), annex); |
| 569 | fd = VG_(fd_open) (doc, VKI_O_RDONLY, 0); |
| 570 | if (fd == -1) { |
| 571 | strcpy (arg_own_buf, "E00"); |
| 572 | return; |
| 573 | } |
| 574 | if (VG_(fstat) (fd, &stat_doc) != 0) { |
| 575 | VG_(close) (fd); |
| 576 | strcpy (arg_own_buf, "E00"); |
| 577 | return; |
| 578 | } |
| 579 | doc_len = stat_doc.size; |
| 580 | |
| 581 | if (len > PBUFSIZ - POVERHSIZ) |
| 582 | len = PBUFSIZ - POVERHSIZ; |
| 583 | |
| 584 | if (ofs > doc_len) { |
| 585 | write_enn (arg_own_buf); |
| 586 | VG_(close) (fd); |
| 587 | return; |
| 588 | } |
| 589 | VG_(lseek) (fd, ofs, VKI_SEEK_SET); |
| 590 | len_read = VG_(read) (fd, toread, len); |
| 591 | *new_packet_len_p = write_qxfer_response (arg_own_buf, toread, |
| 592 | len_read, ofs + len_read < doc_len); |
| 593 | VG_(close) (fd); |
| 594 | return; |
| 595 | } |
| 596 | } |
| 597 | |
sewardj | 2a31239 | 2011-06-26 09:26:48 +0000 | [diff] [blame] | 598 | if (strncmp ("qXfer:auxv:read:", arg_own_buf, 16) == 0) { |
| 599 | unsigned char *data; |
| 600 | int n; |
| 601 | CORE_ADDR ofs; |
| 602 | unsigned int len; |
| 603 | char *annex; |
| 604 | |
| 605 | /* Reject any annex; grab the offset and length. */ |
| 606 | if (decode_xfer_read (arg_own_buf + 16, &annex, &ofs, &len) < 0 |
| 607 | || annex[0] != '\0') { |
| 608 | strcpy (arg_own_buf, "E00"); |
| 609 | return; |
| 610 | } |
| 611 | |
| 612 | if (len > PBUFSIZ - 2) |
| 613 | len = PBUFSIZ - 2; |
| 614 | data = malloc (len); |
| 615 | |
| 616 | { |
| 617 | UWord *client_auxv = VG_(client_auxv); |
| 618 | unsigned int client_auxv_len = 0; |
| 619 | while (*client_auxv != 0) { |
| 620 | dlog(4, "auxv %lld %llx\n", |
| 621 | (ULong)*client_auxv, |
| 622 | (ULong)*(client_auxv+1)); |
| 623 | client_auxv++; |
| 624 | client_auxv++; |
| 625 | client_auxv_len += 2 * sizeof(UWord); |
| 626 | } |
| 627 | client_auxv_len += 2 * sizeof(UWord); |
| 628 | dlog(4, "auxv len %d\n", client_auxv_len); |
| 629 | |
| 630 | if (ofs >= client_auxv_len) |
| 631 | n = -1; |
| 632 | else { |
| 633 | n = client_auxv_len - ofs; |
| 634 | VG_(memcpy) (data, (unsigned char *) VG_(client_auxv), n); |
| 635 | } |
| 636 | } |
| 637 | |
| 638 | if (n < 0) |
| 639 | write_enn (arg_own_buf); |
| 640 | else if (n > len) |
| 641 | *new_packet_len_p = write_qxfer_response (arg_own_buf, data, len, 1); |
| 642 | else |
| 643 | *new_packet_len_p = write_qxfer_response (arg_own_buf, data, n, 0); |
| 644 | |
| 645 | free (data); |
| 646 | |
| 647 | return; |
| 648 | } |
| 649 | |
| 650 | |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 651 | /* Protocol features query. */ |
| 652 | if (strncmp ("qSupported", arg_own_buf, 10) == 0 |
| 653 | && (arg_own_buf[10] == ':' || arg_own_buf[10] == '\0')) { |
| 654 | VG_(sprintf) (arg_own_buf, "PacketSize=%x", PBUFSIZ - 1); |
| 655 | /* Note: max packet size including frame and checksum, but without |
| 656 | trailing null byte, which is not sent/received. */ |
| 657 | |
| 658 | strcat (arg_own_buf, ";QStartNoAckMode+"); |
| 659 | strcat (arg_own_buf, ";QPassSignals+"); |
sewardj | 2a31239 | 2011-06-26 09:26:48 +0000 | [diff] [blame] | 660 | if (VG_(client_auxv)) |
| 661 | strcat (arg_own_buf, ";qXfer:auxv:read+"); |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 662 | |
philippe | 419d5f2 | 2012-05-24 21:33:17 +0000 | [diff] [blame] | 663 | if (valgrind_target_xml(VG_(clo_vgdb_shadow_registers)) != NULL) { |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 664 | strcat (arg_own_buf, ";qXfer:features:read+"); |
| 665 | /* if a new gdb connects to us, we have to reset the register |
| 666 | set to the normal register sets to allow this new gdb to |
| 667 | decide to use or not the shadow registers. |
| 668 | |
| 669 | Note that the reset is only done for gdb that are sending |
| 670 | qSupported packets. If a user first connected with a recent |
| 671 | gdb using shadow registers and then with a very old gdb |
| 672 | that does not use qSupported packet, then the old gdb will |
| 673 | not properly connect. */ |
| 674 | initialize_shadow_low(False); |
| 675 | } |
| 676 | return; |
| 677 | } |
| 678 | |
| 679 | /* Otherwise we didn't know what packet it was. Say we didn't |
| 680 | understand it. */ |
| 681 | arg_own_buf[0] = 0; |
| 682 | } |
| 683 | |
| 684 | /* Handle all of the extended 'v' packets. */ |
| 685 | static |
sewardj | 0bb3c67 | 2011-07-26 23:29:25 +0000 | [diff] [blame] | 686 | void handle_v_requests (char *arg_own_buf, char *status, int *zignal) |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 687 | { |
| 688 | /* vcont packet code from gdb 6.6 removed */ |
| 689 | |
| 690 | /* Otherwise we didn't know what packet it was. Say we didn't |
| 691 | understand it. */ |
| 692 | arg_own_buf[0] = 0; |
| 693 | return; |
| 694 | } |
| 695 | |
| 696 | static |
| 697 | void myresume (int step, int sig) |
| 698 | { |
| 699 | struct thread_resume resume_info[2]; |
| 700 | int n = 0; |
| 701 | |
philippe | 349a391 | 2012-05-23 21:50:36 +0000 | [diff] [blame] | 702 | if (step || sig) { |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 703 | resume_info[0].step = step; |
| 704 | resume_info[0].sig = sig; |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 705 | n++; |
| 706 | } |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 707 | resume_info[n].step = 0; |
| 708 | resume_info[n].sig = 0; |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 709 | |
philippe | 349a391 | 2012-05-23 21:50:36 +0000 | [diff] [blame] | 710 | resume_reply_packet_needed = True; |
| 711 | valgrind_resume (resume_info); |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 712 | } |
| 713 | |
| 714 | /* server_main global variables */ |
| 715 | static char *own_buf; |
| 716 | static unsigned char *mem_buf; |
| 717 | |
| 718 | void gdbserver_init (void) |
| 719 | { |
| 720 | dlog(1, "gdbserver_init gdbserver embedded in valgrind: %s\n", version); |
| 721 | noack_mode = False; |
philippe | 349a391 | 2012-05-23 21:50:36 +0000 | [diff] [blame] | 722 | valgrind_initialize_target (); |
philippe | 0e1cac9 | 2012-02-28 22:37:44 +0000 | [diff] [blame] | 723 | // After a fork, gdbserver_init can be called again. |
| 724 | // We do not have to re-malloc the buffers in such a case. |
| 725 | if (own_buf == NULL) |
| 726 | own_buf = malloc (PBUFSIZ); |
| 727 | if (mem_buf == NULL) |
| 728 | mem_buf = malloc (PBUFSIZ); |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 729 | } |
| 730 | |
| 731 | void gdbserver_terminate (void) |
| 732 | { |
| 733 | /* last call to gdbserver is cleanup call */ |
| 734 | if (VG_MINIMAL_SETJMP(toplevel)) { |
| 735 | dlog(0, "error caused VG_MINIMAL_LONGJMP to gdbserver_terminate\n"); |
| 736 | return; |
| 737 | } |
| 738 | remote_close(); |
| 739 | } |
| 740 | |
| 741 | void server_main (void) |
| 742 | { |
| 743 | static char status; |
sewardj | 0bb3c67 | 2011-07-26 23:29:25 +0000 | [diff] [blame] | 744 | static int zignal; |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 745 | |
| 746 | char ch; |
| 747 | int i = 0; |
| 748 | unsigned int len; |
| 749 | CORE_ADDR mem_addr; |
| 750 | |
philippe | 349a391 | 2012-05-23 21:50:36 +0000 | [diff] [blame] | 751 | zignal = valgrind_wait (&status); |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 752 | if (VG_MINIMAL_SETJMP(toplevel)) { |
| 753 | dlog(0, "error caused VG_MINIMAL_LONGJMP to server_main\n"); |
| 754 | } |
| 755 | while (1) { |
| 756 | unsigned char sig; |
| 757 | int packet_len; |
| 758 | int new_packet_len = -1; |
| 759 | |
philippe | 349a391 | 2012-05-23 21:50:36 +0000 | [diff] [blame] | 760 | if (resume_reply_packet_needed) { |
| 761 | /* Send the resume reply to reply to last GDB resume |
| 762 | request. */ |
| 763 | resume_reply_packet_needed = False; |
sewardj | 0bb3c67 | 2011-07-26 23:29:25 +0000 | [diff] [blame] | 764 | prepare_resume_reply (own_buf, status, zignal); |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 765 | putpkt (own_buf); |
| 766 | } |
| 767 | |
philippe | 0447bbd | 2012-10-17 21:32:03 +0000 | [diff] [blame^] | 768 | /* If we our status is terminal (exit or fatal signal) get out |
| 769 | as quickly as we can. We won't be able to handle any request |
| 770 | anymore. */ |
| 771 | if (status == 'W' || status == 'X') { |
| 772 | return; |
| 773 | } |
| 774 | |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 775 | packet_len = getpkt (own_buf); |
| 776 | if (packet_len <= 0) |
| 777 | break; |
| 778 | |
| 779 | i = 0; |
| 780 | ch = own_buf[i++]; |
| 781 | switch (ch) { |
| 782 | case 'Q': |
| 783 | handle_set (own_buf, &new_packet_len); |
| 784 | break; |
| 785 | case 'q': |
| 786 | handle_query (own_buf, &new_packet_len); |
| 787 | break; |
| 788 | case 'd': |
| 789 | /* set/unset debugging is done through valgrind debug level. */ |
| 790 | own_buf[0] = '\0'; |
| 791 | break; |
| 792 | case 'D': |
| 793 | reset_valgrind_sink("gdb detaching from process"); |
| 794 | |
| 795 | /* When detaching or kill the process, gdb expects to get |
| 796 | an packet OK back. Any other output will make gdb |
| 797 | believes detach did not work. */ |
| 798 | write_ok (own_buf); |
| 799 | putpkt (own_buf); |
| 800 | remote_finish (reset_after_error); |
| 801 | remote_open (VG_(clo_vgdb_prefix)); |
| 802 | myresume (0, 0); |
philippe | 349a391 | 2012-05-23 21:50:36 +0000 | [diff] [blame] | 803 | resume_reply_packet_needed = False; |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 804 | return; |
| 805 | case '!': |
| 806 | /* We can not use the extended protocol with valgrind, |
| 807 | because we can not restart the running |
| 808 | program. So return unrecognized. */ |
| 809 | own_buf[0] = '\0'; |
| 810 | break; |
| 811 | case '?': |
sewardj | 0bb3c67 | 2011-07-26 23:29:25 +0000 | [diff] [blame] | 812 | prepare_resume_reply (own_buf, status, zignal); |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 813 | break; |
| 814 | case 'H': |
| 815 | if (own_buf[1] == 'c' || own_buf[1] == 'g' || own_buf[1] == 's') { |
| 816 | unsigned long gdb_id, thread_id; |
| 817 | |
| 818 | gdb_id = strtoul (&own_buf[2], NULL, 16); |
| 819 | thread_id = gdb_id_to_thread_id (gdb_id); |
| 820 | if (thread_id == 0) { |
| 821 | write_enn (own_buf); |
| 822 | break; |
| 823 | } |
| 824 | |
| 825 | if (own_buf[1] == 'g') { |
| 826 | general_thread = thread_id; |
| 827 | set_desired_inferior (1); |
| 828 | } else if (own_buf[1] == 'c') { |
| 829 | cont_thread = thread_id; |
| 830 | } else if (own_buf[1] == 's') { |
| 831 | step_thread = thread_id; |
| 832 | } |
| 833 | |
| 834 | write_ok (own_buf); |
| 835 | } else { |
| 836 | /* Silently ignore it so that gdb can extend the protocol |
| 837 | without compatibility headaches. */ |
| 838 | own_buf[0] = '\0'; |
| 839 | } |
| 840 | break; |
| 841 | case 'g': |
| 842 | set_desired_inferior (1); |
| 843 | registers_to_string (own_buf); |
| 844 | break; |
| 845 | case 'G': |
| 846 | set_desired_inferior (1); |
| 847 | registers_from_string (&own_buf[1]); |
| 848 | write_ok (own_buf); |
| 849 | break; |
| 850 | case 'P': { |
| 851 | int regno; |
| 852 | char *regbytes; |
| 853 | Bool mod; |
| 854 | ThreadState *tst; |
| 855 | regno = strtol(&own_buf[1], NULL, 16); |
| 856 | regbytes = strchr(&own_buf[0], '=') + 1; |
| 857 | set_desired_inferior (1); |
| 858 | tst = (ThreadState *) inferior_target_data (current_inferior); |
| 859 | /* Only accept changing registers in "runnable state3. |
| 860 | In fact, it would be ok to change most of the registers |
| 861 | except a few "sensitive" registers such as the PC, SP, BP. |
| 862 | We assume we do not need to very specific here, and that we |
| 863 | can just refuse all of these. */ |
| 864 | if (tst->status == VgTs_Runnable || tst->status == VgTs_Yielding) { |
| 865 | supply_register_from_string (regno, regbytes, &mod); |
| 866 | write_ok (own_buf); |
| 867 | } else { |
| 868 | /* at least from gdb 6.6 onwards, an E. error |
| 869 | reply is shown to the user. So, we do an error |
| 870 | msg which both is accepted by gdb as an error msg |
| 871 | and is readable by the user. */ |
| 872 | VG_(sprintf) |
| 873 | (own_buf, |
| 874 | "E.\n" |
| 875 | "ERROR changing register %s regno %d\n" |
| 876 | "gdb commands changing registers (pc, sp, ...) (e.g. 'jump',\n" |
| 877 | "set pc, calling from gdb a function in the debugged process, ...)\n" |
| 878 | "can only be accepted if the thread is VgTs_Runnable or VgTs_Yielding state\n" |
| 879 | "Thread status is %s\n", |
| 880 | find_register_by_number (regno)->name, regno, |
| 881 | VG_(name_of_ThreadStatus)(tst->status)); |
| 882 | if (VG_(clo_verbosity) > 1) |
| 883 | VG_(umsg) ("%s\n", own_buf); |
| 884 | } |
| 885 | break; |
| 886 | } |
| 887 | case 'm': |
| 888 | decode_m_packet (&own_buf[1], &mem_addr, &len); |
philippe | 349a391 | 2012-05-23 21:50:36 +0000 | [diff] [blame] | 889 | if (valgrind_read_memory (mem_addr, mem_buf, len) == 0) |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 890 | convert_int_to_ascii (mem_buf, own_buf, len); |
| 891 | else |
| 892 | write_enn (own_buf); |
| 893 | break; |
| 894 | case 'M': |
| 895 | decode_M_packet (&own_buf[1], &mem_addr, &len, mem_buf); |
philippe | 349a391 | 2012-05-23 21:50:36 +0000 | [diff] [blame] | 896 | if (valgrind_write_memory (mem_addr, mem_buf, len) == 0) |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 897 | write_ok (own_buf); |
| 898 | else |
| 899 | write_enn (own_buf); |
| 900 | break; |
| 901 | case 'X': |
| 902 | if (decode_X_packet (&own_buf[1], packet_len - 1, |
| 903 | &mem_addr, &len, mem_buf) < 0 |
philippe | 349a391 | 2012-05-23 21:50:36 +0000 | [diff] [blame] | 904 | || valgrind_write_memory (mem_addr, mem_buf, len) != 0) |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 905 | write_enn (own_buf); |
| 906 | else |
| 907 | write_ok (own_buf); |
| 908 | break; |
| 909 | case 'C': |
| 910 | convert_ascii_to_int (own_buf + 1, &sig, 1); |
| 911 | if (target_signal_to_host_p (sig)) |
sewardj | 0bb3c67 | 2011-07-26 23:29:25 +0000 | [diff] [blame] | 912 | zignal = target_signal_to_host (sig); |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 913 | else |
sewardj | 0bb3c67 | 2011-07-26 23:29:25 +0000 | [diff] [blame] | 914 | zignal = 0; |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 915 | set_desired_inferior (0); |
sewardj | 0bb3c67 | 2011-07-26 23:29:25 +0000 | [diff] [blame] | 916 | myresume (0, zignal); |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 917 | return; // return control to valgrind |
| 918 | case 'S': |
| 919 | convert_ascii_to_int (own_buf + 1, &sig, 1); |
| 920 | if (target_signal_to_host_p (sig)) |
sewardj | 0bb3c67 | 2011-07-26 23:29:25 +0000 | [diff] [blame] | 921 | zignal = target_signal_to_host (sig); |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 922 | else |
sewardj | 0bb3c67 | 2011-07-26 23:29:25 +0000 | [diff] [blame] | 923 | zignal = 0; |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 924 | set_desired_inferior (0); |
sewardj | 0bb3c67 | 2011-07-26 23:29:25 +0000 | [diff] [blame] | 925 | myresume (1, zignal); |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 926 | return; // return control to valgrind |
| 927 | case 'c': |
| 928 | set_desired_inferior (0); |
| 929 | myresume (0, 0); |
| 930 | return; // return control to valgrind |
| 931 | case 's': |
| 932 | set_desired_inferior (0); |
| 933 | myresume (1, 0); |
| 934 | return; // return control to valgrind |
| 935 | case 'Z': { |
| 936 | char *lenptr; |
| 937 | char *dataptr; |
| 938 | CORE_ADDR addr = strtoul (&own_buf[3], &lenptr, 16); |
| 939 | int zlen = strtol (lenptr + 1, &dataptr, 16); |
| 940 | char type = own_buf[1]; |
| 941 | |
philippe | 349a391 | 2012-05-23 21:50:36 +0000 | [diff] [blame] | 942 | if (type < '0' || type > '4') { |
| 943 | /* Watchpoint command type unrecognized. */ |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 944 | own_buf[0] = '\0'; |
| 945 | } else { |
| 946 | int res; |
| 947 | |
philippe | 349a391 | 2012-05-23 21:50:36 +0000 | [diff] [blame] | 948 | res = valgrind_insert_watchpoint (type, addr, zlen); |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 949 | if (res == 0) |
| 950 | write_ok (own_buf); |
| 951 | else if (res == 1) |
| 952 | /* Unsupported. */ |
| 953 | own_buf[0] = '\0'; |
| 954 | else |
| 955 | write_enn (own_buf); |
| 956 | } |
| 957 | break; |
| 958 | } |
| 959 | case 'z': { |
| 960 | char *lenptr; |
| 961 | char *dataptr; |
| 962 | CORE_ADDR addr = strtoul (&own_buf[3], &lenptr, 16); |
| 963 | int zlen = strtol (lenptr + 1, &dataptr, 16); |
| 964 | char type = own_buf[1]; |
| 965 | |
philippe | 349a391 | 2012-05-23 21:50:36 +0000 | [diff] [blame] | 966 | if (type < '0' || type > '4') { |
| 967 | /* Watchpoint command type unrecognized. */ |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 968 | own_buf[0] = '\0'; |
| 969 | } else { |
| 970 | int res; |
| 971 | |
philippe | 349a391 | 2012-05-23 21:50:36 +0000 | [diff] [blame] | 972 | res = valgrind_remove_watchpoint (type, addr, zlen); |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 973 | if (res == 0) |
| 974 | write_ok (own_buf); |
| 975 | else if (res == 1) |
| 976 | /* Unsupported. */ |
| 977 | own_buf[0] = '\0'; |
| 978 | else |
| 979 | write_enn (own_buf); |
| 980 | } |
| 981 | break; |
| 982 | } |
| 983 | case 'k': |
| 984 | kill_request("Gdb request to kill this process\n"); |
| 985 | break; |
| 986 | case 'T': { |
| 987 | unsigned long gdb_id, thread_id; |
| 988 | |
| 989 | gdb_id = strtoul (&own_buf[1], NULL, 16); |
| 990 | thread_id = gdb_id_to_thread_id (gdb_id); |
| 991 | if (thread_id == 0) { |
| 992 | write_enn (own_buf); |
| 993 | break; |
| 994 | } |
| 995 | |
philippe | 349a391 | 2012-05-23 21:50:36 +0000 | [diff] [blame] | 996 | if (valgrind_thread_alive (thread_id)) |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 997 | write_ok (own_buf); |
| 998 | else |
| 999 | write_enn (own_buf); |
| 1000 | break; |
| 1001 | } |
| 1002 | case 'R': |
| 1003 | /* Restarting the inferior is only supported in the |
| 1004 | extended protocol. |
| 1005 | => It is a request we don't understand. Respond with an |
| 1006 | empty packet so that gdb knows that we don't support this |
| 1007 | request. */ |
| 1008 | own_buf[0] = '\0'; |
| 1009 | break; |
| 1010 | case 'v': |
| 1011 | /* Extended (long) request. */ |
sewardj | 0bb3c67 | 2011-07-26 23:29:25 +0000 | [diff] [blame] | 1012 | handle_v_requests (own_buf, &status, &zignal); |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 1013 | break; |
| 1014 | default: |
| 1015 | /* It is a request we don't understand. Respond with an |
| 1016 | empty packet so that gdb knows that we don't support this |
| 1017 | request. */ |
| 1018 | own_buf[0] = '\0'; |
| 1019 | break; |
| 1020 | } |
| 1021 | |
| 1022 | if (new_packet_len != -1) |
| 1023 | putpkt_binary (own_buf, new_packet_len); |
| 1024 | else |
| 1025 | putpkt (own_buf); |
| 1026 | |
| 1027 | if (status == 'W') |
sewardj | 0bb3c67 | 2011-07-26 23:29:25 +0000 | [diff] [blame] | 1028 | VG_(umsg) ("\nChild exited with status %d\n", zignal); |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 1029 | if (status == 'X') |
sewardj | 47ffedb | 2011-10-24 07:36:57 +0000 | [diff] [blame] | 1030 | VG_(umsg) ("\nChild terminated with signal = 0x%x (%s)\n", |
sewardj | 0bb3c67 | 2011-07-26 23:29:25 +0000 | [diff] [blame] | 1031 | target_signal_to_host (zignal), |
| 1032 | target_signal_to_name (zignal)); |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 1033 | if (status == 'W' || status == 'X') { |
| 1034 | VG_(umsg) ("Process exiting\n"); |
| 1035 | VG_(exit) (0); |
| 1036 | } |
| 1037 | } |
| 1038 | |
| 1039 | /* We come here when getpkt fails => close the connection, |
| 1040 | and re-open. Then return control to valgrind. |
| 1041 | We return the control to valgrind as we assume that |
| 1042 | the connection was closed due to vgdb having finished |
| 1043 | to execute a command. */ |
| 1044 | if (VG_(clo_verbosity) > 1) |
| 1045 | VG_(umsg) ("Remote side has terminated connection. " |
| 1046 | "GDBserver will reopen the connection.\n"); |
| 1047 | remote_finish (reset_after_error); |
| 1048 | remote_open (VG_(clo_vgdb_prefix)); |
| 1049 | myresume (0, 0); |
philippe | 349a391 | 2012-05-23 21:50:36 +0000 | [diff] [blame] | 1050 | resume_reply_packet_needed = False; |
sewardj | 3b29048 | 2011-05-06 21:02:55 +0000 | [diff] [blame] | 1051 | return; |
| 1052 | } |