| 1 | /* Machine independent support for QNX Neutrino /proc (process file system) |
| 2 | for GDB. Written by Colin Burgess at QNX Software Systems Limited. |
| 3 | |
| 4 | Copyright 2003 Free Software Foundation, Inc. |
| 5 | |
| 6 | Contributed by QNX Software Systems Ltd. |
| 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 2 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, write to the Free Software |
| 22 | Foundation, Inc., 59 Temple Place - Suite 330, |
| 23 | Boston, MA 02111-1307, USA. */ |
| 24 | |
| 25 | #include "defs.h" |
| 26 | |
| 27 | #include <fcntl.h> |
| 28 | #include <spawn.h> |
| 29 | #include <sys/debug.h> |
| 30 | #include <sys/procfs.h> |
| 31 | #include <sys/neutrino.h> |
| 32 | #include <sys/syspage.h> |
| 33 | #include "gdb_dirent.h" |
| 34 | #include <sys/netmgr.h> |
| 35 | |
| 36 | #include "exceptions.h" |
| 37 | #include "gdb_string.h" |
| 38 | #include "gdbcore.h" |
| 39 | #include "inferior.h" |
| 40 | #include "target.h" |
| 41 | #include "objfiles.h" |
| 42 | #include "gdbthread.h" |
| 43 | #include "nto-tdep.h" |
| 44 | #include "command.h" |
| 45 | #include "regcache.h" |
| 46 | |
| 47 | #define NULL_PID 0 |
| 48 | #define _DEBUG_FLAG_TRACE (_DEBUG_FLAG_TRACE_EXEC|_DEBUG_FLAG_TRACE_RD|\ |
| 49 | _DEBUG_FLAG_TRACE_WR|_DEBUG_FLAG_TRACE_MODIFY) |
| 50 | |
| 51 | static struct target_ops procfs_ops; |
| 52 | |
| 53 | int ctl_fd; |
| 54 | |
| 55 | static void (*ofunc) (); |
| 56 | |
| 57 | static procfs_run run; |
| 58 | |
| 59 | static void procfs_open (char *, int); |
| 60 | |
| 61 | static int procfs_can_run (void); |
| 62 | |
| 63 | static ptid_t procfs_wait (ptid_t, struct target_waitstatus *); |
| 64 | |
| 65 | static int procfs_xfer_memory (CORE_ADDR, char *, int, int, |
| 66 | struct mem_attrib *attrib, |
| 67 | struct target_ops *); |
| 68 | |
| 69 | static void procfs_fetch_registers (int); |
| 70 | |
| 71 | static void notice_signals (void); |
| 72 | |
| 73 | static void init_procfs_ops (void); |
| 74 | |
| 75 | static ptid_t do_attach (ptid_t ptid); |
| 76 | |
| 77 | static int procfs_can_use_hw_breakpoint (int, int, int); |
| 78 | |
| 79 | static int procfs_insert_hw_breakpoint (CORE_ADDR, char *); |
| 80 | |
| 81 | static int procfs_remove_hw_breakpoint (CORE_ADDR addr, char *); |
| 82 | |
| 83 | static int procfs_insert_hw_watchpoint (CORE_ADDR addr, int len, int type); |
| 84 | |
| 85 | static int procfs_remove_hw_watchpoint (CORE_ADDR addr, int len, int type); |
| 86 | |
| 87 | static int procfs_stopped_by_watchpoint (void); |
| 88 | |
| 89 | /* These two globals are only ever set in procfs_open(), but are |
| 90 | referenced elsewhere. 'nto_procfs_node' is a flag used to say |
| 91 | whether we are local, or we should get the current node descriptor |
| 92 | for the remote QNX node. */ |
| 93 | static char nto_procfs_path[PATH_MAX] = { "/proc" }; |
| 94 | static unsigned nto_procfs_node = ND_LOCAL_NODE; |
| 95 | |
| 96 | /* Return the current QNX Node, or error out. This is a simple |
| 97 | wrapper for the netmgr_strtond() function. The reason this |
| 98 | is required is because QNX node descriptors are transient so |
| 99 | we have to re-acquire them every time. */ |
| 100 | static unsigned |
| 101 | nto_node (void) |
| 102 | { |
| 103 | unsigned node; |
| 104 | |
| 105 | if (ND_NODE_CMP (nto_procfs_node, ND_LOCAL_NODE) == 0) |
| 106 | return ND_LOCAL_NODE; |
| 107 | |
| 108 | node = netmgr_strtond (nto_procfs_path, 0); |
| 109 | if (node == -1) |
| 110 | error (_("Lost the QNX node. Debug session probably over.")); |
| 111 | |
| 112 | return (node); |
| 113 | } |
| 114 | |
| 115 | static enum gdb_osabi |
| 116 | procfs_is_nto_target (bfd *abfd) |
| 117 | { |
| 118 | return GDB_OSABI_QNXNTO; |
| 119 | } |
| 120 | |
| 121 | /* This is called when we call 'target procfs <arg>' from the (gdb) prompt. |
| 122 | For QNX6 (nto), the only valid arg will be a QNX node string, |
| 123 | eg: "/net/some_node". If arg is not a valid QNX node, we will |
| 124 | default to local. */ |
| 125 | static void |
| 126 | procfs_open (char *arg, int from_tty) |
| 127 | { |
| 128 | char *nodestr; |
| 129 | char *endstr; |
| 130 | char buffer[50]; |
| 131 | int fd, total_size; |
| 132 | procfs_sysinfo *sysinfo; |
| 133 | |
| 134 | nto_is_nto_target = procfs_is_nto_target; |
| 135 | |
| 136 | /* Set the default node used for spawning to this one, |
| 137 | and only override it if there is a valid arg. */ |
| 138 | |
| 139 | nto_procfs_node = ND_LOCAL_NODE; |
| 140 | nodestr = arg ? xstrdup (arg) : arg; |
| 141 | |
| 142 | init_thread_list (); |
| 143 | |
| 144 | if (nodestr) |
| 145 | { |
| 146 | nto_procfs_node = netmgr_strtond (nodestr, &endstr); |
| 147 | if (nto_procfs_node == -1) |
| 148 | { |
| 149 | if (errno == ENOTSUP) |
| 150 | printf_filtered ("QNX Net Manager not found.\n"); |
| 151 | printf_filtered ("Invalid QNX node %s: error %d (%s).\n", nodestr, |
| 152 | errno, safe_strerror (errno)); |
| 153 | xfree (nodestr); |
| 154 | nodestr = NULL; |
| 155 | nto_procfs_node = ND_LOCAL_NODE; |
| 156 | } |
| 157 | else if (*endstr) |
| 158 | { |
| 159 | if (*(endstr - 1) == '/') |
| 160 | *(endstr - 1) = 0; |
| 161 | else |
| 162 | *endstr = 0; |
| 163 | } |
| 164 | } |
| 165 | snprintf (nto_procfs_path, PATH_MAX - 1, "%s%s", nodestr ? nodestr : "", |
| 166 | "/proc"); |
| 167 | if (nodestr) |
| 168 | xfree (nodestr); |
| 169 | |
| 170 | fd = open (nto_procfs_path, O_RDONLY); |
| 171 | if (fd == -1) |
| 172 | { |
| 173 | printf_filtered ("Error opening %s : %d (%s)\n", nto_procfs_path, errno, |
| 174 | safe_strerror (errno)); |
| 175 | error (_("Invalid procfs arg")); |
| 176 | } |
| 177 | |
| 178 | sysinfo = (void *) buffer; |
| 179 | if (devctl (fd, DCMD_PROC_SYSINFO, sysinfo, sizeof buffer, 0) != EOK) |
| 180 | { |
| 181 | printf_filtered ("Error getting size: %d (%s)\n", errno, |
| 182 | safe_strerror (errno)); |
| 183 | close (fd); |
| 184 | error (_("Devctl failed.")); |
| 185 | } |
| 186 | else |
| 187 | { |
| 188 | total_size = sysinfo->total_size; |
| 189 | sysinfo = alloca (total_size); |
| 190 | if (!sysinfo) |
| 191 | { |
| 192 | printf_filtered ("Memory error: %d (%s)\n", errno, |
| 193 | safe_strerror (errno)); |
| 194 | close (fd); |
| 195 | error (_("alloca failed.")); |
| 196 | } |
| 197 | else |
| 198 | { |
| 199 | if (devctl (fd, DCMD_PROC_SYSINFO, sysinfo, total_size, 0) != EOK) |
| 200 | { |
| 201 | printf_filtered ("Error getting sysinfo: %d (%s)\n", errno, |
| 202 | safe_strerror (errno)); |
| 203 | close (fd); |
| 204 | error (_("Devctl failed.")); |
| 205 | } |
| 206 | else |
| 207 | { |
| 208 | if (sysinfo->type != |
| 209 | nto_map_arch_to_cputype (TARGET_ARCHITECTURE->arch_name)) |
| 210 | { |
| 211 | close (fd); |
| 212 | error (_("Invalid target CPU.")); |
| 213 | } |
| 214 | } |
| 215 | } |
| 216 | } |
| 217 | close (fd); |
| 218 | printf_filtered ("Debugging using %s\n", nto_procfs_path); |
| 219 | } |
| 220 | |
| 221 | static void |
| 222 | procfs_set_thread (ptid_t ptid) |
| 223 | { |
| 224 | pid_t tid; |
| 225 | |
| 226 | tid = ptid_get_tid (ptid); |
| 227 | devctl (ctl_fd, DCMD_PROC_CURTHREAD, &tid, sizeof (tid), 0); |
| 228 | } |
| 229 | |
| 230 | /* Return nonzero if the thread TH is still alive. */ |
| 231 | static int |
| 232 | procfs_thread_alive (ptid_t ptid) |
| 233 | { |
| 234 | pid_t tid; |
| 235 | |
| 236 | tid = ptid_get_tid (ptid); |
| 237 | if (devctl (ctl_fd, DCMD_PROC_CURTHREAD, &tid, sizeof (tid), 0) == EOK) |
| 238 | return 1; |
| 239 | return 0; |
| 240 | } |
| 241 | |
| 242 | void |
| 243 | procfs_find_new_threads (void) |
| 244 | { |
| 245 | procfs_status status; |
| 246 | pid_t pid; |
| 247 | ptid_t ptid; |
| 248 | |
| 249 | if (ctl_fd == -1) |
| 250 | return; |
| 251 | |
| 252 | pid = ptid_get_pid (inferior_ptid); |
| 253 | |
| 254 | for (status.tid = 1;; ++status.tid) |
| 255 | { |
| 256 | if (devctl (ctl_fd, DCMD_PROC_TIDSTATUS, &status, sizeof (status), 0) |
| 257 | != EOK && status.tid != 0) |
| 258 | break; |
| 259 | ptid = ptid_build (pid, 0, status.tid); |
| 260 | if (!in_thread_list (ptid)) |
| 261 | add_thread (ptid); |
| 262 | } |
| 263 | return; |
| 264 | } |
| 265 | |
| 266 | void |
| 267 | procfs_pidlist (char *args, int from_tty) |
| 268 | { |
| 269 | DIR *dp = NULL; |
| 270 | struct dirent *dirp = NULL; |
| 271 | int fd = -1; |
| 272 | char buf[512]; |
| 273 | procfs_info *pidinfo = NULL; |
| 274 | procfs_debuginfo *info = NULL; |
| 275 | procfs_status *status = NULL; |
| 276 | pid_t num_threads = 0; |
| 277 | pid_t pid; |
| 278 | char name[512]; |
| 279 | |
| 280 | dp = opendir (nto_procfs_path); |
| 281 | if (dp == NULL) |
| 282 | { |
| 283 | fprintf_unfiltered (gdb_stderr, "failed to opendir \"%s\" - %d (%s)", |
| 284 | nto_procfs_path, errno, safe_strerror (errno)); |
| 285 | return; |
| 286 | } |
| 287 | |
| 288 | /* Start scan at first pid. */ |
| 289 | rewinddir (dp); |
| 290 | |
| 291 | do |
| 292 | { |
| 293 | /* Get the right pid and procfs path for the pid. */ |
| 294 | do |
| 295 | { |
| 296 | dirp = readdir (dp); |
| 297 | if (dirp == NULL) |
| 298 | { |
| 299 | closedir (dp); |
| 300 | return; |
| 301 | } |
| 302 | snprintf (buf, 511, "%s/%s/as", nto_procfs_path, dirp->d_name); |
| 303 | pid = atoi (dirp->d_name); |
| 304 | } |
| 305 | while (pid == 0); |
| 306 | |
| 307 | /* Open the procfs path. */ |
| 308 | fd = open (buf, O_RDONLY); |
| 309 | if (fd == -1) |
| 310 | { |
| 311 | fprintf_unfiltered (gdb_stderr, "failed to open %s - %d (%s)\n", |
| 312 | buf, errno, safe_strerror (errno)); |
| 313 | closedir (dp); |
| 314 | return; |
| 315 | } |
| 316 | |
| 317 | pidinfo = (procfs_info *) buf; |
| 318 | if (devctl (fd, DCMD_PROC_INFO, pidinfo, sizeof (buf), 0) != EOK) |
| 319 | { |
| 320 | fprintf_unfiltered (gdb_stderr, |
| 321 | "devctl DCMD_PROC_INFO failed - %d (%s)\n", |
| 322 | errno, safe_strerror (errno)); |
| 323 | break; |
| 324 | } |
| 325 | num_threads = pidinfo->num_threads; |
| 326 | |
| 327 | info = (procfs_debuginfo *) buf; |
| 328 | if (devctl (fd, DCMD_PROC_MAPDEBUG_BASE, info, sizeof (buf), 0) != EOK) |
| 329 | strcpy (name, "unavailable"); |
| 330 | else |
| 331 | strcpy (name, info->path); |
| 332 | |
| 333 | /* Collect state info on all the threads. */ |
| 334 | status = (procfs_status *) buf; |
| 335 | for (status->tid = 1; status->tid <= num_threads; status->tid++) |
| 336 | { |
| 337 | if (devctl (fd, DCMD_PROC_TIDSTATUS, status, sizeof (buf), 0) != EOK |
| 338 | && status->tid != 0) |
| 339 | break; |
| 340 | if (status->tid != 0) |
| 341 | printf_filtered ("%s - %d/%d\n", name, pid, status->tid); |
| 342 | } |
| 343 | close (fd); |
| 344 | } |
| 345 | while (dirp != NULL); |
| 346 | |
| 347 | close (fd); |
| 348 | closedir (dp); |
| 349 | return; |
| 350 | } |
| 351 | |
| 352 | void |
| 353 | procfs_meminfo (char *args, int from_tty) |
| 354 | { |
| 355 | procfs_mapinfo *mapinfos = NULL; |
| 356 | static int num_mapinfos = 0; |
| 357 | procfs_mapinfo *mapinfo_p, *mapinfo_p2; |
| 358 | int flags = ~0, err, num, i, j; |
| 359 | |
| 360 | struct |
| 361 | { |
| 362 | procfs_debuginfo info; |
| 363 | char buff[_POSIX_PATH_MAX]; |
| 364 | } map; |
| 365 | |
| 366 | struct info |
| 367 | { |
| 368 | unsigned addr; |
| 369 | unsigned size; |
| 370 | unsigned flags; |
| 371 | unsigned debug_vaddr; |
| 372 | unsigned long long offset; |
| 373 | }; |
| 374 | |
| 375 | struct printinfo |
| 376 | { |
| 377 | unsigned long long ino; |
| 378 | unsigned dev; |
| 379 | struct info text; |
| 380 | struct info data; |
| 381 | char name[256]; |
| 382 | } printme; |
| 383 | |
| 384 | /* Get the number of map entrys. */ |
| 385 | err = devctl (ctl_fd, DCMD_PROC_MAPINFO, NULL, 0, &num); |
| 386 | if (err != EOK) |
| 387 | { |
| 388 | printf ("failed devctl num mapinfos - %d (%s)\n", err, |
| 389 | safe_strerror (err)); |
| 390 | return; |
| 391 | } |
| 392 | |
| 393 | mapinfos = xmalloc (num * sizeof (procfs_mapinfo)); |
| 394 | |
| 395 | num_mapinfos = num; |
| 396 | mapinfo_p = mapinfos; |
| 397 | |
| 398 | /* Fill the map entrys. */ |
| 399 | err = devctl (ctl_fd, DCMD_PROC_MAPINFO, mapinfo_p, num |
| 400 | * sizeof (procfs_mapinfo), &num); |
| 401 | if (err != EOK) |
| 402 | { |
| 403 | printf ("failed devctl mapinfos - %d (%s)\n", err, safe_strerror (err)); |
| 404 | xfree (mapinfos); |
| 405 | return; |
| 406 | } |
| 407 | |
| 408 | num = min (num, num_mapinfos); |
| 409 | |
| 410 | /* Run through the list of mapinfos, and store the data and text info |
| 411 | so we can print it at the bottom of the loop. */ |
| 412 | for (mapinfo_p = mapinfos, i = 0; i < num; i++, mapinfo_p++) |
| 413 | { |
| 414 | if (!(mapinfo_p->flags & flags)) |
| 415 | mapinfo_p->ino = 0; |
| 416 | |
| 417 | if (mapinfo_p->ino == 0) /* Already visited. */ |
| 418 | continue; |
| 419 | |
| 420 | map.info.vaddr = mapinfo_p->vaddr; |
| 421 | |
| 422 | err = devctl (ctl_fd, DCMD_PROC_MAPDEBUG, &map, sizeof (map), 0); |
| 423 | if (err != EOK) |
| 424 | continue; |
| 425 | |
| 426 | memset (&printme, 0, sizeof printme); |
| 427 | printme.dev = mapinfo_p->dev; |
| 428 | printme.ino = mapinfo_p->ino; |
| 429 | printme.text.addr = mapinfo_p->vaddr; |
| 430 | printme.text.size = mapinfo_p->size; |
| 431 | printme.text.flags = mapinfo_p->flags; |
| 432 | printme.text.offset = mapinfo_p->offset; |
| 433 | printme.text.debug_vaddr = map.info.vaddr; |
| 434 | strcpy (printme.name, map.info.path); |
| 435 | |
| 436 | /* Check for matching data. */ |
| 437 | for (mapinfo_p2 = mapinfos, j = 0; j < num; j++, mapinfo_p2++) |
| 438 | { |
| 439 | if (mapinfo_p2->vaddr != mapinfo_p->vaddr |
| 440 | && mapinfo_p2->ino == mapinfo_p->ino |
| 441 | && mapinfo_p2->dev == mapinfo_p->dev) |
| 442 | { |
| 443 | map.info.vaddr = mapinfo_p2->vaddr; |
| 444 | err = |
| 445 | devctl (ctl_fd, DCMD_PROC_MAPDEBUG, &map, sizeof (map), 0); |
| 446 | if (err != EOK) |
| 447 | continue; |
| 448 | |
| 449 | if (strcmp (map.info.path, printme.name)) |
| 450 | continue; |
| 451 | |
| 452 | /* Lower debug_vaddr is always text, if nessessary, swap. */ |
| 453 | if ((int) map.info.vaddr < (int) printme.text.debug_vaddr) |
| 454 | { |
| 455 | memcpy (&(printme.data), &(printme.text), |
| 456 | sizeof (printme.data)); |
| 457 | printme.text.addr = mapinfo_p2->vaddr; |
| 458 | printme.text.size = mapinfo_p2->size; |
| 459 | printme.text.flags = mapinfo_p2->flags; |
| 460 | printme.text.offset = mapinfo_p2->offset; |
| 461 | printme.text.debug_vaddr = map.info.vaddr; |
| 462 | } |
| 463 | else |
| 464 | { |
| 465 | printme.data.addr = mapinfo_p2->vaddr; |
| 466 | printme.data.size = mapinfo_p2->size; |
| 467 | printme.data.flags = mapinfo_p2->flags; |
| 468 | printme.data.offset = mapinfo_p2->offset; |
| 469 | printme.data.debug_vaddr = map.info.vaddr; |
| 470 | } |
| 471 | mapinfo_p2->ino = 0; |
| 472 | } |
| 473 | } |
| 474 | mapinfo_p->ino = 0; |
| 475 | |
| 476 | printf_filtered ("%s\n", printme.name); |
| 477 | printf_filtered ("\ttext=%08x bytes @ 0x%08x\n", printme.text.size, |
| 478 | printme.text.addr); |
| 479 | printf_filtered ("\t\tflags=%08x\n", printme.text.flags); |
| 480 | printf_filtered ("\t\tdebug=%08x\n", printme.text.debug_vaddr); |
| 481 | printf_filtered ("\t\toffset=%016llx\n", printme.text.offset); |
| 482 | if (printme.data.size) |
| 483 | { |
| 484 | printf_filtered ("\tdata=%08x bytes @ 0x%08x\n", printme.data.size, |
| 485 | printme.data.addr); |
| 486 | printf_filtered ("\t\tflags=%08x\n", printme.data.flags); |
| 487 | printf_filtered ("\t\tdebug=%08x\n", printme.data.debug_vaddr); |
| 488 | printf_filtered ("\t\toffset=%016llx\n", printme.data.offset); |
| 489 | } |
| 490 | printf_filtered ("\tdev=0x%x\n", printme.dev); |
| 491 | printf_filtered ("\tino=0x%x\n", (unsigned int) printme.ino); |
| 492 | } |
| 493 | xfree (mapinfos); |
| 494 | return; |
| 495 | } |
| 496 | |
| 497 | /* Print status information about what we're accessing. */ |
| 498 | static void |
| 499 | procfs_files_info (struct target_ops *ignore) |
| 500 | { |
| 501 | printf_unfiltered ("\tUsing the running image of %s %s via %s.\n", |
| 502 | attach_flag ? "attached" : "child", |
| 503 | target_pid_to_str (inferior_ptid), nto_procfs_path); |
| 504 | } |
| 505 | |
| 506 | /* Mark our target-struct as eligible for stray "run" and "attach" commands. */ |
| 507 | static int |
| 508 | procfs_can_run (void) |
| 509 | { |
| 510 | return 1; |
| 511 | } |
| 512 | |
| 513 | /* Attach to process PID, then initialize for debugging it. */ |
| 514 | static void |
| 515 | procfs_attach (char *args, int from_tty) |
| 516 | { |
| 517 | char *exec_file; |
| 518 | int pid; |
| 519 | |
| 520 | if (!args) |
| 521 | error_no_arg (_("process-id to attach")); |
| 522 | |
| 523 | pid = atoi (args); |
| 524 | |
| 525 | if (pid == getpid ()) |
| 526 | error (_("Attaching GDB to itself is not a good idea...")); |
| 527 | |
| 528 | if (from_tty) |
| 529 | { |
| 530 | exec_file = (char *) get_exec_file (0); |
| 531 | |
| 532 | if (exec_file) |
| 533 | printf_unfiltered ("Attaching to program `%s', %s\n", exec_file, |
| 534 | target_pid_to_str (pid_to_ptid (pid))); |
| 535 | else |
| 536 | printf_unfiltered ("Attaching to %s\n", |
| 537 | target_pid_to_str (pid_to_ptid (pid))); |
| 538 | |
| 539 | gdb_flush (gdb_stdout); |
| 540 | } |
| 541 | inferior_ptid = do_attach (pid_to_ptid (pid)); |
| 542 | push_target (&procfs_ops); |
| 543 | } |
| 544 | |
| 545 | static void |
| 546 | procfs_post_attach (pid_t pid) |
| 547 | { |
| 548 | #ifdef SOLIB_CREATE_INFERIOR_HOOK |
| 549 | if (exec_bfd) |
| 550 | SOLIB_CREATE_INFERIOR_HOOK (pid); |
| 551 | #endif |
| 552 | } |
| 553 | |
| 554 | static ptid_t |
| 555 | do_attach (ptid_t ptid) |
| 556 | { |
| 557 | procfs_status status; |
| 558 | struct sigevent event; |
| 559 | char path[PATH_MAX]; |
| 560 | |
| 561 | snprintf (path, PATH_MAX - 1, "%s/%d/as", nto_procfs_path, PIDGET (ptid)); |
| 562 | ctl_fd = open (path, O_RDWR); |
| 563 | if (ctl_fd == -1) |
| 564 | error (_("Couldn't open proc file %s, error %d (%s)"), path, errno, |
| 565 | safe_strerror (errno)); |
| 566 | if (devctl (ctl_fd, DCMD_PROC_STOP, &status, sizeof (status), 0) != EOK) |
| 567 | error (_("Couldn't stop process")); |
| 568 | |
| 569 | /* Define a sigevent for process stopped notification. */ |
| 570 | event.sigev_notify = SIGEV_SIGNAL_THREAD; |
| 571 | event.sigev_signo = SIGUSR1; |
| 572 | event.sigev_code = 0; |
| 573 | event.sigev_value.sival_ptr = NULL; |
| 574 | event.sigev_priority = -1; |
| 575 | devctl (ctl_fd, DCMD_PROC_EVENT, &event, sizeof (event), 0); |
| 576 | |
| 577 | if (devctl (ctl_fd, DCMD_PROC_STATUS, &status, sizeof (status), 0) == EOK |
| 578 | && status.flags & _DEBUG_FLAG_STOPPED) |
| 579 | SignalKill (nto_node (), PIDGET (ptid), 0, SIGCONT, 0, 0); |
| 580 | attach_flag = 1; |
| 581 | nto_init_solib_absolute_prefix (); |
| 582 | return ptid; |
| 583 | } |
| 584 | |
| 585 | /* Ask the user what to do when an interrupt is received. */ |
| 586 | static void |
| 587 | interrupt_query (void) |
| 588 | { |
| 589 | target_terminal_ours (); |
| 590 | |
| 591 | if (query ("Interrupted while waiting for the program.\n\ |
| 592 | Give up (and stop debugging it)? ")) |
| 593 | { |
| 594 | target_mourn_inferior (); |
| 595 | deprecated_throw_reason (RETURN_QUIT); |
| 596 | } |
| 597 | |
| 598 | target_terminal_inferior (); |
| 599 | } |
| 600 | |
| 601 | /* The user typed ^C twice. */ |
| 602 | static void |
| 603 | nto_interrupt_twice (int signo) |
| 604 | { |
| 605 | signal (signo, ofunc); |
| 606 | interrupt_query (); |
| 607 | signal (signo, nto_interrupt_twice); |
| 608 | } |
| 609 | |
| 610 | static void |
| 611 | nto_interrupt (int signo) |
| 612 | { |
| 613 | /* If this doesn't work, try more severe steps. */ |
| 614 | signal (signo, nto_interrupt_twice); |
| 615 | |
| 616 | target_stop (); |
| 617 | } |
| 618 | |
| 619 | static ptid_t |
| 620 | procfs_wait (ptid_t ptid, struct target_waitstatus *ourstatus) |
| 621 | { |
| 622 | sigset_t set; |
| 623 | siginfo_t info; |
| 624 | procfs_status status; |
| 625 | static int exit_signo = 0; /* To track signals that cause termination. */ |
| 626 | |
| 627 | ourstatus->kind = TARGET_WAITKIND_SPURIOUS; |
| 628 | |
| 629 | if (ptid_equal (inferior_ptid, null_ptid)) |
| 630 | { |
| 631 | ourstatus->kind = TARGET_WAITKIND_STOPPED; |
| 632 | ourstatus->value.sig = TARGET_SIGNAL_0; |
| 633 | exit_signo = 0; |
| 634 | return null_ptid; |
| 635 | } |
| 636 | |
| 637 | sigemptyset (&set); |
| 638 | sigaddset (&set, SIGUSR1); |
| 639 | |
| 640 | devctl (ctl_fd, DCMD_PROC_STATUS, &status, sizeof (status), 0); |
| 641 | while (!(status.flags & _DEBUG_FLAG_ISTOP)) |
| 642 | { |
| 643 | ofunc = (void (*)()) signal (SIGINT, nto_interrupt); |
| 644 | sigwaitinfo (&set, &info); |
| 645 | signal (SIGINT, ofunc); |
| 646 | devctl (ctl_fd, DCMD_PROC_STATUS, &status, sizeof (status), 0); |
| 647 | } |
| 648 | |
| 649 | if (status.flags & _DEBUG_FLAG_SSTEP) |
| 650 | { |
| 651 | ourstatus->kind = TARGET_WAITKIND_STOPPED; |
| 652 | ourstatus->value.sig = TARGET_SIGNAL_TRAP; |
| 653 | } |
| 654 | /* Was it a breakpoint? */ |
| 655 | else if (status.flags & _DEBUG_FLAG_TRACE) |
| 656 | { |
| 657 | ourstatus->kind = TARGET_WAITKIND_STOPPED; |
| 658 | ourstatus->value.sig = TARGET_SIGNAL_TRAP; |
| 659 | } |
| 660 | else if (status.flags & _DEBUG_FLAG_ISTOP) |
| 661 | { |
| 662 | switch (status.why) |
| 663 | { |
| 664 | case _DEBUG_WHY_SIGNALLED: |
| 665 | ourstatus->kind = TARGET_WAITKIND_STOPPED; |
| 666 | ourstatus->value.sig = |
| 667 | target_signal_from_host (status.info.si_signo); |
| 668 | exit_signo = 0; |
| 669 | break; |
| 670 | case _DEBUG_WHY_FAULTED: |
| 671 | ourstatus->kind = TARGET_WAITKIND_STOPPED; |
| 672 | if (status.info.si_signo == SIGTRAP) |
| 673 | { |
| 674 | ourstatus->value.sig = 0; |
| 675 | exit_signo = 0; |
| 676 | } |
| 677 | else |
| 678 | { |
| 679 | ourstatus->value.sig = |
| 680 | target_signal_from_host (status.info.si_signo); |
| 681 | exit_signo = ourstatus->value.sig; |
| 682 | } |
| 683 | break; |
| 684 | |
| 685 | case _DEBUG_WHY_TERMINATED: |
| 686 | { |
| 687 | int waitval = 0; |
| 688 | |
| 689 | waitpid (PIDGET (inferior_ptid), &waitval, WNOHANG); |
| 690 | if (exit_signo) |
| 691 | { |
| 692 | /* Abnormal death. */ |
| 693 | ourstatus->kind = TARGET_WAITKIND_SIGNALLED; |
| 694 | ourstatus->value.sig = exit_signo; |
| 695 | } |
| 696 | else |
| 697 | { |
| 698 | /* Normal death. */ |
| 699 | ourstatus->kind = TARGET_WAITKIND_EXITED; |
| 700 | ourstatus->value.integer = WEXITSTATUS (waitval); |
| 701 | } |
| 702 | exit_signo = 0; |
| 703 | break; |
| 704 | } |
| 705 | |
| 706 | case _DEBUG_WHY_REQUESTED: |
| 707 | /* We are assuming a requested stop is due to a SIGINT. */ |
| 708 | ourstatus->kind = TARGET_WAITKIND_STOPPED; |
| 709 | ourstatus->value.sig = TARGET_SIGNAL_INT; |
| 710 | exit_signo = 0; |
| 711 | break; |
| 712 | } |
| 713 | } |
| 714 | |
| 715 | return inferior_ptid; |
| 716 | } |
| 717 | |
| 718 | /* Read the current values of the inferior's registers, both the |
| 719 | general register set and floating point registers (if supported) |
| 720 | and update gdb's idea of their current values. */ |
| 721 | static void |
| 722 | procfs_fetch_registers (int regno) |
| 723 | { |
| 724 | union |
| 725 | { |
| 726 | procfs_greg greg; |
| 727 | procfs_fpreg fpreg; |
| 728 | procfs_altreg altreg; |
| 729 | } |
| 730 | reg; |
| 731 | int regsize; |
| 732 | |
| 733 | procfs_set_thread (inferior_ptid); |
| 734 | if (devctl (ctl_fd, DCMD_PROC_GETGREG, ®, sizeof (reg), ®size) == EOK) |
| 735 | nto_supply_gregset ((char *) ®.greg); |
| 736 | if (devctl (ctl_fd, DCMD_PROC_GETFPREG, ®, sizeof (reg), ®size) |
| 737 | == EOK) |
| 738 | nto_supply_fpregset ((char *) ®.fpreg); |
| 739 | if (devctl (ctl_fd, DCMD_PROC_GETALTREG, ®, sizeof (reg), ®size) |
| 740 | == EOK) |
| 741 | nto_supply_altregset ((char *) ®.altreg); |
| 742 | } |
| 743 | |
| 744 | /* Copy LEN bytes to/from inferior's memory starting at MEMADDR |
| 745 | from/to debugger memory starting at MYADDR. Copy from inferior |
| 746 | if DOWRITE is zero or to inferior if DOWRITE is nonzero. |
| 747 | |
| 748 | Returns the length copied, which is either the LEN argument or |
| 749 | zero. This xfer function does not do partial moves, since procfs_ops |
| 750 | doesn't allow memory operations to cross below us in the target stack |
| 751 | anyway. */ |
| 752 | static int |
| 753 | procfs_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, int dowrite, |
| 754 | struct mem_attrib *attrib, struct target_ops *target) |
| 755 | { |
| 756 | int nbytes = 0; |
| 757 | |
| 758 | if (lseek (ctl_fd, (off_t) memaddr, SEEK_SET) == (off_t) memaddr) |
| 759 | { |
| 760 | if (dowrite) |
| 761 | nbytes = write (ctl_fd, myaddr, len); |
| 762 | else |
| 763 | nbytes = read (ctl_fd, myaddr, len); |
| 764 | if (nbytes < 0) |
| 765 | nbytes = 0; |
| 766 | } |
| 767 | return (nbytes); |
| 768 | } |
| 769 | |
| 770 | /* Take a program previously attached to and detaches it. |
| 771 | The program resumes execution and will no longer stop |
| 772 | on signals, etc. We'd better not have left any breakpoints |
| 773 | in the program or it'll die when it hits one. */ |
| 774 | static void |
| 775 | procfs_detach (char *args, int from_tty) |
| 776 | { |
| 777 | int siggnal = 0; |
| 778 | |
| 779 | if (from_tty) |
| 780 | { |
| 781 | char *exec_file = get_exec_file (0); |
| 782 | if (exec_file == 0) |
| 783 | exec_file = ""; |
| 784 | printf_unfiltered ("Detaching from program: %s %s\n", |
| 785 | exec_file, target_pid_to_str (inferior_ptid)); |
| 786 | gdb_flush (gdb_stdout); |
| 787 | } |
| 788 | if (args) |
| 789 | siggnal = atoi (args); |
| 790 | |
| 791 | if (siggnal) |
| 792 | SignalKill (nto_node (), PIDGET (inferior_ptid), 0, siggnal, 0, 0); |
| 793 | |
| 794 | close (ctl_fd); |
| 795 | ctl_fd = -1; |
| 796 | init_thread_list (); |
| 797 | inferior_ptid = null_ptid; |
| 798 | attach_flag = 0; |
| 799 | unpush_target (&procfs_ops); /* Pop out of handling an inferior. */ |
| 800 | } |
| 801 | |
| 802 | static int |
| 803 | procfs_breakpoint (CORE_ADDR addr, int type, int size) |
| 804 | { |
| 805 | procfs_break brk; |
| 806 | |
| 807 | brk.type = type; |
| 808 | brk.addr = addr; |
| 809 | brk.size = size; |
| 810 | errno = devctl (ctl_fd, DCMD_PROC_BREAK, &brk, sizeof (brk), 0); |
| 811 | if (errno != EOK) |
| 812 | return 1; |
| 813 | return 0; |
| 814 | } |
| 815 | |
| 816 | static int |
| 817 | procfs_insert_breakpoint (CORE_ADDR addr, char *contents_cache) |
| 818 | { |
| 819 | return procfs_breakpoint (addr, _DEBUG_BREAK_EXEC, 0); |
| 820 | } |
| 821 | |
| 822 | static int |
| 823 | procfs_remove_breakpoint (CORE_ADDR addr, char *contents_cache) |
| 824 | { |
| 825 | return procfs_breakpoint (addr, _DEBUG_BREAK_EXEC, -1); |
| 826 | } |
| 827 | |
| 828 | static int |
| 829 | procfs_insert_hw_breakpoint (CORE_ADDR addr, char *contents_cache) |
| 830 | { |
| 831 | return procfs_breakpoint (addr, _DEBUG_BREAK_EXEC | _DEBUG_BREAK_HW, 0); |
| 832 | } |
| 833 | |
| 834 | static int |
| 835 | procfs_remove_hw_breakpoint (CORE_ADDR addr, char *contents_cache) |
| 836 | { |
| 837 | return procfs_breakpoint (addr, _DEBUG_BREAK_EXEC | _DEBUG_BREAK_HW, -1); |
| 838 | } |
| 839 | |
| 840 | static void |
| 841 | procfs_resume (ptid_t ptid, int step, enum target_signal signo) |
| 842 | { |
| 843 | int signal_to_pass; |
| 844 | procfs_status status; |
| 845 | |
| 846 | if (ptid_equal (inferior_ptid, null_ptid)) |
| 847 | return; |
| 848 | |
| 849 | procfs_set_thread (ptid_equal (ptid, minus_one_ptid) ? inferior_ptid : |
| 850 | ptid); |
| 851 | |
| 852 | run.flags = _DEBUG_RUN_FAULT | _DEBUG_RUN_TRACE; |
| 853 | if (step) |
| 854 | run.flags |= _DEBUG_RUN_STEP; |
| 855 | |
| 856 | sigemptyset ((sigset_t *) &run.fault); |
| 857 | sigaddset ((sigset_t *) &run.fault, FLTBPT); |
| 858 | sigaddset ((sigset_t *) &run.fault, FLTTRACE); |
| 859 | sigaddset ((sigset_t *) &run.fault, FLTILL); |
| 860 | sigaddset ((sigset_t *) &run.fault, FLTPRIV); |
| 861 | sigaddset ((sigset_t *) &run.fault, FLTBOUNDS); |
| 862 | sigaddset ((sigset_t *) &run.fault, FLTIOVF); |
| 863 | sigaddset ((sigset_t *) &run.fault, FLTIZDIV); |
| 864 | sigaddset ((sigset_t *) &run.fault, FLTFPE); |
| 865 | /* Peter V will be changing this at some point. */ |
| 866 | sigaddset ((sigset_t *) &run.fault, FLTPAGE); |
| 867 | |
| 868 | run.flags |= _DEBUG_RUN_ARM; |
| 869 | |
| 870 | sigemptyset (&run.trace); |
| 871 | notice_signals (); |
| 872 | signal_to_pass = target_signal_to_host (signo); |
| 873 | |
| 874 | if (signal_to_pass) |
| 875 | { |
| 876 | devctl (ctl_fd, DCMD_PROC_STATUS, &status, sizeof (status), 0); |
| 877 | signal_to_pass = target_signal_to_host (signo); |
| 878 | if (status.why & (_DEBUG_WHY_SIGNALLED | _DEBUG_WHY_FAULTED)) |
| 879 | { |
| 880 | if (signal_to_pass != status.info.si_signo) |
| 881 | { |
| 882 | SignalKill (nto_node (), PIDGET (inferior_ptid), 0, |
| 883 | signal_to_pass, 0, 0); |
| 884 | run.flags |= _DEBUG_RUN_CLRFLT | _DEBUG_RUN_CLRSIG; |
| 885 | } |
| 886 | else /* Let it kill the program without telling us. */ |
| 887 | sigdelset (&run.trace, signal_to_pass); |
| 888 | } |
| 889 | } |
| 890 | else |
| 891 | run.flags |= _DEBUG_RUN_CLRSIG | _DEBUG_RUN_CLRFLT; |
| 892 | |
| 893 | errno = devctl (ctl_fd, DCMD_PROC_RUN, &run, sizeof (run), 0); |
| 894 | if (errno != EOK) |
| 895 | { |
| 896 | perror ("run error!\n"); |
| 897 | return; |
| 898 | } |
| 899 | } |
| 900 | |
| 901 | static void |
| 902 | procfs_mourn_inferior (void) |
| 903 | { |
| 904 | if (!ptid_equal (inferior_ptid, null_ptid)) |
| 905 | { |
| 906 | SignalKill (nto_node (), PIDGET (inferior_ptid), 0, SIGKILL, 0, 0); |
| 907 | close (ctl_fd); |
| 908 | } |
| 909 | inferior_ptid = null_ptid; |
| 910 | init_thread_list (); |
| 911 | unpush_target (&procfs_ops); |
| 912 | generic_mourn_inferior (); |
| 913 | attach_flag = 0; |
| 914 | } |
| 915 | |
| 916 | /* This function breaks up an argument string into an argument |
| 917 | vector suitable for passing to execvp(). |
| 918 | E.g., on "run a b c d" this routine would get as input |
| 919 | the string "a b c d", and as output it would fill in argv with |
| 920 | the four arguments "a", "b", "c", "d". The only additional |
| 921 | functionality is simple quoting. The gdb command: |
| 922 | run a "b c d" f |
| 923 | will fill in argv with the three args "a", "b c d", "e". */ |
| 924 | static void |
| 925 | breakup_args (char *scratch, char **argv) |
| 926 | { |
| 927 | char *pp, *cp = scratch; |
| 928 | char quoting = 0; |
| 929 | |
| 930 | for (;;) |
| 931 | { |
| 932 | /* Scan past leading separators. */ |
| 933 | quoting = 0; |
| 934 | while (*cp == ' ' || *cp == '\t' || *cp == '\n') |
| 935 | cp++; |
| 936 | |
| 937 | /* Break if at end of string. */ |
| 938 | if (*cp == '\0') |
| 939 | break; |
| 940 | |
| 941 | /* Take an arg. */ |
| 942 | if (*cp == '"') |
| 943 | { |
| 944 | cp++; |
| 945 | quoting = strchr (cp, '"') ? 1 : 0; |
| 946 | } |
| 947 | |
| 948 | *argv++ = cp; |
| 949 | |
| 950 | /* Scan for next arg separator. */ |
| 951 | pp = cp; |
| 952 | if (quoting) |
| 953 | cp = strchr (pp, '"'); |
| 954 | if ((cp == NULL) || (!quoting)) |
| 955 | cp = strchr (pp, ' '); |
| 956 | if (cp == NULL) |
| 957 | cp = strchr (pp, '\t'); |
| 958 | if (cp == NULL) |
| 959 | cp = strchr (pp, '\n'); |
| 960 | |
| 961 | /* No separators => end of string => break. */ |
| 962 | if (cp == NULL) |
| 963 | { |
| 964 | pp = cp; |
| 965 | break; |
| 966 | } |
| 967 | |
| 968 | /* Replace the separator with a terminator. */ |
| 969 | *cp++ = '\0'; |
| 970 | } |
| 971 | |
| 972 | /* Execv requires a null-terminated arg vector. */ |
| 973 | *argv = NULL; |
| 974 | } |
| 975 | |
| 976 | static void |
| 977 | procfs_create_inferior (char *exec_file, char *allargs, char **env, |
| 978 | int from_tty) |
| 979 | { |
| 980 | struct inheritance inherit; |
| 981 | pid_t pid; |
| 982 | int flags, errn; |
| 983 | char **argv, *args; |
| 984 | char *in = "", *out = "", *err = ""; |
| 985 | int fd, fds[3]; |
| 986 | sigset_t set; |
| 987 | |
| 988 | argv = xmalloc (((strlen (allargs) + 1) / (unsigned) 2 + 2) * |
| 989 | sizeof (*argv)); |
| 990 | argv[0] = get_exec_file (1); |
| 991 | if (!argv[0]) |
| 992 | { |
| 993 | if (exec_file) |
| 994 | argv[0] = exec_file; |
| 995 | else |
| 996 | return; |
| 997 | } |
| 998 | |
| 999 | args = xstrdup (allargs); |
| 1000 | breakup_args (args, exec_file ? &argv[1] : &argv[0]); |
| 1001 | |
| 1002 | argv = nto_parse_redirection (argv, &in, &out, &err); |
| 1003 | |
| 1004 | fds[0] = STDIN_FILENO; |
| 1005 | fds[1] = STDOUT_FILENO; |
| 1006 | fds[2] = STDERR_FILENO; |
| 1007 | |
| 1008 | /* If the user specified I/O via gdb's --tty= arg, use it, but only |
| 1009 | if the i/o is not also being specified via redirection. */ |
| 1010 | if (inferior_io_terminal) |
| 1011 | { |
| 1012 | if (!in[0]) |
| 1013 | in = inferior_io_terminal; |
| 1014 | if (!out[0]) |
| 1015 | out = inferior_io_terminal; |
| 1016 | if (!err[0]) |
| 1017 | err = inferior_io_terminal; |
| 1018 | } |
| 1019 | |
| 1020 | if (in[0]) |
| 1021 | { |
| 1022 | fd = open (in, O_RDONLY); |
| 1023 | if (fd == -1) |
| 1024 | perror (in); |
| 1025 | else |
| 1026 | fds[0] = fd; |
| 1027 | } |
| 1028 | if (out[0]) |
| 1029 | { |
| 1030 | fd = open (out, O_WRONLY); |
| 1031 | if (fd == -1) |
| 1032 | perror (out); |
| 1033 | else |
| 1034 | fds[1] = fd; |
| 1035 | } |
| 1036 | if (err[0]) |
| 1037 | { |
| 1038 | fd = open (err, O_WRONLY); |
| 1039 | if (fd == -1) |
| 1040 | perror (err); |
| 1041 | else |
| 1042 | fds[2] = fd; |
| 1043 | } |
| 1044 | |
| 1045 | /* Clear any pending SIGUSR1's but keep the behavior the same. */ |
| 1046 | signal (SIGUSR1, signal (SIGUSR1, SIG_IGN)); |
| 1047 | |
| 1048 | sigemptyset (&set); |
| 1049 | sigaddset (&set, SIGUSR1); |
| 1050 | sigprocmask (SIG_UNBLOCK, &set, NULL); |
| 1051 | |
| 1052 | memset (&inherit, 0, sizeof (inherit)); |
| 1053 | |
| 1054 | if (ND_NODE_CMP (nto_procfs_node, ND_LOCAL_NODE) != 0) |
| 1055 | { |
| 1056 | inherit.nd = nto_node (); |
| 1057 | inherit.flags |= SPAWN_SETND; |
| 1058 | inherit.flags &= ~SPAWN_EXEC; |
| 1059 | } |
| 1060 | inherit.flags |= SPAWN_SETGROUP | SPAWN_HOLD; |
| 1061 | inherit.pgroup = SPAWN_NEWPGROUP; |
| 1062 | pid = spawnp (argv[0], 3, fds, &inherit, argv, |
| 1063 | ND_NODE_CMP (nto_procfs_node, ND_LOCAL_NODE) == 0 ? env : 0); |
| 1064 | xfree (args); |
| 1065 | |
| 1066 | sigprocmask (SIG_BLOCK, &set, NULL); |
| 1067 | |
| 1068 | if (pid == -1) |
| 1069 | error (_("Error spawning %s: %d (%s)"), argv[0], errno, |
| 1070 | safe_strerror (errno)); |
| 1071 | |
| 1072 | if (fds[0] != STDIN_FILENO) |
| 1073 | close (fds[0]); |
| 1074 | if (fds[1] != STDOUT_FILENO) |
| 1075 | close (fds[1]); |
| 1076 | if (fds[2] != STDERR_FILENO) |
| 1077 | close (fds[2]); |
| 1078 | |
| 1079 | inferior_ptid = do_attach (pid_to_ptid (pid)); |
| 1080 | |
| 1081 | attach_flag = 0; |
| 1082 | flags = _DEBUG_FLAG_KLC; /* Kill-on-Last-Close flag. */ |
| 1083 | errn = devctl (ctl_fd, DCMD_PROC_SET_FLAG, &flags, sizeof (flags), 0); |
| 1084 | if (errn != EOK) |
| 1085 | { |
| 1086 | /* FIXME: expected warning? */ |
| 1087 | /* warning( "Failed to set Kill-on-Last-Close flag: errno = %d(%s)\n", |
| 1088 | errn, strerror(errn) ); */ |
| 1089 | } |
| 1090 | push_target (&procfs_ops); |
| 1091 | target_terminal_init (); |
| 1092 | |
| 1093 | #ifdef SOLIB_CREATE_INFERIOR_HOOK |
| 1094 | if (exec_bfd != NULL |
| 1095 | || (symfile_objfile != NULL && symfile_objfile->obfd != NULL)) |
| 1096 | SOLIB_CREATE_INFERIOR_HOOK (pid); |
| 1097 | #endif |
| 1098 | stop_soon = 0; |
| 1099 | proceed (-1, TARGET_SIGNAL_DEFAULT, 0); |
| 1100 | } |
| 1101 | |
| 1102 | static void |
| 1103 | procfs_stop (void) |
| 1104 | { |
| 1105 | devctl (ctl_fd, DCMD_PROC_STOP, NULL, 0, 0); |
| 1106 | } |
| 1107 | |
| 1108 | static void |
| 1109 | procfs_kill_inferior (void) |
| 1110 | { |
| 1111 | target_mourn_inferior (); |
| 1112 | } |
| 1113 | |
| 1114 | /* Store register REGNO, or all registers if REGNO == -1, from the contents |
| 1115 | of REGISTERS. */ |
| 1116 | static void |
| 1117 | procfs_prepare_to_store (void) |
| 1118 | { |
| 1119 | } |
| 1120 | |
| 1121 | /* Fill buf with regset and return devctl cmd to do the setting. Return |
| 1122 | -1 if we fail to get the regset. Store size of regset in regsize. */ |
| 1123 | static int |
| 1124 | get_regset (int regset, char *buf, int bufsize, int *regsize) |
| 1125 | { |
| 1126 | int dev_get, dev_set; |
| 1127 | switch (regset) |
| 1128 | { |
| 1129 | case NTO_REG_GENERAL: |
| 1130 | dev_get = DCMD_PROC_GETGREG; |
| 1131 | dev_set = DCMD_PROC_SETGREG; |
| 1132 | break; |
| 1133 | |
| 1134 | case NTO_REG_FLOAT: |
| 1135 | dev_get = DCMD_PROC_GETFPREG; |
| 1136 | dev_set = DCMD_PROC_SETFPREG; |
| 1137 | break; |
| 1138 | |
| 1139 | case NTO_REG_ALT: |
| 1140 | dev_get = DCMD_PROC_GETALTREG; |
| 1141 | dev_set = DCMD_PROC_SETALTREG; |
| 1142 | break; |
| 1143 | |
| 1144 | case NTO_REG_SYSTEM: |
| 1145 | default: |
| 1146 | return -1; |
| 1147 | } |
| 1148 | if (devctl (ctl_fd, dev_get, &buf, bufsize, regsize) != EOK) |
| 1149 | return -1; |
| 1150 | |
| 1151 | return dev_set; |
| 1152 | } |
| 1153 | |
| 1154 | void |
| 1155 | procfs_store_registers (int regno) |
| 1156 | { |
| 1157 | union |
| 1158 | { |
| 1159 | procfs_greg greg; |
| 1160 | procfs_fpreg fpreg; |
| 1161 | procfs_altreg altreg; |
| 1162 | } |
| 1163 | reg; |
| 1164 | unsigned off; |
| 1165 | int len, regset, regsize, dev_set, err; |
| 1166 | char *data; |
| 1167 | |
| 1168 | if (ptid_equal (inferior_ptid, null_ptid)) |
| 1169 | return; |
| 1170 | procfs_set_thread (inferior_ptid); |
| 1171 | |
| 1172 | if (regno == -1) |
| 1173 | { |
| 1174 | for (regset = NTO_REG_GENERAL; regset < NTO_REG_END; regset++) |
| 1175 | { |
| 1176 | dev_set = get_regset (regset, (char *) ®, |
| 1177 | sizeof (reg), ®size); |
| 1178 | if (dev_set == -1) |
| 1179 | continue; |
| 1180 | |
| 1181 | if (nto_regset_fill (regset, (char *) ®) == -1) |
| 1182 | continue; |
| 1183 | |
| 1184 | err = devctl (ctl_fd, dev_set, ®, regsize, 0); |
| 1185 | if (err != EOK) |
| 1186 | fprintf_unfiltered (gdb_stderr, |
| 1187 | "Warning unable to write regset %d: %s\n", |
| 1188 | regno, safe_strerror (err)); |
| 1189 | } |
| 1190 | } |
| 1191 | else |
| 1192 | { |
| 1193 | regset = nto_regset_id (regno); |
| 1194 | if (regset == -1) |
| 1195 | return; |
| 1196 | |
| 1197 | dev_set = get_regset (regset, (char *) ®, sizeof (reg), ®size); |
| 1198 | if (dev_set == -1) |
| 1199 | return; |
| 1200 | |
| 1201 | len = nto_register_area (regno, regset, &off); |
| 1202 | |
| 1203 | if (len < 1) |
| 1204 | return; |
| 1205 | |
| 1206 | regcache_raw_collect (current_regcache, regno, (char *) ® + off); |
| 1207 | |
| 1208 | err = devctl (ctl_fd, dev_set, ®, regsize, 0); |
| 1209 | if (err != EOK) |
| 1210 | fprintf_unfiltered (gdb_stderr, |
| 1211 | "Warning unable to write regset %d: %s\n", regno, |
| 1212 | safe_strerror (err)); |
| 1213 | } |
| 1214 | } |
| 1215 | |
| 1216 | static void |
| 1217 | notice_signals (void) |
| 1218 | { |
| 1219 | int signo; |
| 1220 | |
| 1221 | for (signo = 1; signo < NSIG; signo++) |
| 1222 | { |
| 1223 | if (signal_stop_state (target_signal_from_host (signo)) == 0 |
| 1224 | && signal_print_state (target_signal_from_host (signo)) == 0 |
| 1225 | && signal_pass_state (target_signal_from_host (signo)) == 1) |
| 1226 | sigdelset (&run.trace, signo); |
| 1227 | else |
| 1228 | sigaddset (&run.trace, signo); |
| 1229 | } |
| 1230 | } |
| 1231 | |
| 1232 | /* When the user changes the state of gdb's signal handling via the |
| 1233 | "handle" command, this function gets called to see if any change |
| 1234 | in the /proc interface is required. It is also called internally |
| 1235 | by other /proc interface functions to initialize the state of |
| 1236 | the traced signal set. */ |
| 1237 | static void |
| 1238 | procfs_notice_signals (ptid_t ptid) |
| 1239 | { |
| 1240 | sigemptyset (&run.trace); |
| 1241 | notice_signals (); |
| 1242 | } |
| 1243 | |
| 1244 | static struct tidinfo * |
| 1245 | procfs_thread_info (pid_t pid, short tid) |
| 1246 | { |
| 1247 | /* NYI */ |
| 1248 | return NULL; |
| 1249 | } |
| 1250 | |
| 1251 | char * |
| 1252 | procfs_pid_to_str (ptid_t ptid) |
| 1253 | { |
| 1254 | static char buf[1024]; |
| 1255 | int pid, tid, n; |
| 1256 | struct tidinfo *tip; |
| 1257 | |
| 1258 | pid = ptid_get_pid (ptid); |
| 1259 | tid = ptid_get_tid (ptid); |
| 1260 | |
| 1261 | n = snprintf (buf, 1023, "process %d", pid); |
| 1262 | |
| 1263 | #if 0 /* NYI */ |
| 1264 | tip = procfs_thread_info (pid, tid); |
| 1265 | if (tip != NULL) |
| 1266 | snprintf (&buf[n], 1023, " (state = 0x%02x)", tip->state); |
| 1267 | #endif |
| 1268 | |
| 1269 | return buf; |
| 1270 | } |
| 1271 | |
| 1272 | static void |
| 1273 | init_procfs_ops (void) |
| 1274 | { |
| 1275 | procfs_ops.to_shortname = "procfs"; |
| 1276 | procfs_ops.to_longname = "QNX Neutrino procfs child process"; |
| 1277 | procfs_ops.to_doc = |
| 1278 | "QNX Neutrino procfs child process (started by the \"run\" command).\n\ |
| 1279 | target procfs <node>"; |
| 1280 | procfs_ops.to_open = procfs_open; |
| 1281 | procfs_ops.to_attach = procfs_attach; |
| 1282 | procfs_ops.to_post_attach = procfs_post_attach; |
| 1283 | procfs_ops.to_detach = procfs_detach; |
| 1284 | procfs_ops.to_resume = procfs_resume; |
| 1285 | procfs_ops.to_wait = procfs_wait; |
| 1286 | procfs_ops.to_fetch_registers = procfs_fetch_registers; |
| 1287 | procfs_ops.to_store_registers = procfs_store_registers; |
| 1288 | procfs_ops.to_prepare_to_store = procfs_prepare_to_store; |
| 1289 | procfs_ops.deprecated_xfer_memory = procfs_xfer_memory; |
| 1290 | procfs_ops.to_files_info = procfs_files_info; |
| 1291 | procfs_ops.to_insert_breakpoint = procfs_insert_breakpoint; |
| 1292 | procfs_ops.to_remove_breakpoint = procfs_remove_breakpoint; |
| 1293 | procfs_ops.to_can_use_hw_breakpoint = procfs_can_use_hw_breakpoint; |
| 1294 | procfs_ops.to_insert_hw_breakpoint = procfs_insert_hw_breakpoint; |
| 1295 | procfs_ops.to_remove_hw_breakpoint = procfs_remove_breakpoint; |
| 1296 | procfs_ops.to_insert_watchpoint = procfs_insert_hw_watchpoint; |
| 1297 | procfs_ops.to_remove_watchpoint = procfs_remove_hw_watchpoint; |
| 1298 | procfs_ops.to_stopped_by_watchpoint = procfs_stopped_by_watchpoint; |
| 1299 | procfs_ops.to_terminal_init = terminal_init_inferior; |
| 1300 | procfs_ops.to_terminal_inferior = terminal_inferior; |
| 1301 | procfs_ops.to_terminal_ours_for_output = terminal_ours_for_output; |
| 1302 | procfs_ops.to_terminal_ours = terminal_ours; |
| 1303 | procfs_ops.to_terminal_info = child_terminal_info; |
| 1304 | procfs_ops.to_kill = procfs_kill_inferior; |
| 1305 | procfs_ops.to_create_inferior = procfs_create_inferior; |
| 1306 | procfs_ops.to_mourn_inferior = procfs_mourn_inferior; |
| 1307 | procfs_ops.to_can_run = procfs_can_run; |
| 1308 | procfs_ops.to_notice_signals = procfs_notice_signals; |
| 1309 | procfs_ops.to_thread_alive = procfs_thread_alive; |
| 1310 | procfs_ops.to_find_new_threads = procfs_find_new_threads; |
| 1311 | procfs_ops.to_pid_to_str = procfs_pid_to_str; |
| 1312 | procfs_ops.to_stop = procfs_stop; |
| 1313 | procfs_ops.to_stratum = process_stratum; |
| 1314 | procfs_ops.to_has_all_memory = 1; |
| 1315 | procfs_ops.to_has_memory = 1; |
| 1316 | procfs_ops.to_has_stack = 1; |
| 1317 | procfs_ops.to_has_registers = 1; |
| 1318 | procfs_ops.to_has_execution = 1; |
| 1319 | procfs_ops.to_magic = OPS_MAGIC; |
| 1320 | procfs_ops.to_have_continuable_watchpoint = 1; |
| 1321 | } |
| 1322 | |
| 1323 | #define OSTYPE_NTO 1 |
| 1324 | |
| 1325 | void |
| 1326 | _initialize_procfs (void) |
| 1327 | { |
| 1328 | sigset_t set; |
| 1329 | |
| 1330 | init_procfs_ops (); |
| 1331 | add_target (&procfs_ops); |
| 1332 | |
| 1333 | /* We use SIGUSR1 to gain control after we block waiting for a process. |
| 1334 | We use sigwaitevent to wait. */ |
| 1335 | sigemptyset (&set); |
| 1336 | sigaddset (&set, SIGUSR1); |
| 1337 | sigprocmask (SIG_BLOCK, &set, NULL); |
| 1338 | |
| 1339 | /* Set up trace and fault sets, as gdb expects them. */ |
| 1340 | sigemptyset (&run.trace); |
| 1341 | |
| 1342 | /* Stuff some information. */ |
| 1343 | nto_cpuinfo_flags = SYSPAGE_ENTRY (cpuinfo)->flags; |
| 1344 | nto_cpuinfo_valid = 1; |
| 1345 | |
| 1346 | add_info ("pidlist", procfs_pidlist, _("pidlist")); |
| 1347 | add_info ("meminfo", procfs_meminfo, _("memory information")); |
| 1348 | |
| 1349 | nto_is_nto_target = procfs_is_nto_target; |
| 1350 | } |
| 1351 | |
| 1352 | |
| 1353 | static int |
| 1354 | procfs_hw_watchpoint (int addr, int len, int type) |
| 1355 | { |
| 1356 | procfs_break brk; |
| 1357 | |
| 1358 | switch (type) |
| 1359 | { |
| 1360 | case 1: /* Read. */ |
| 1361 | brk.type = _DEBUG_BREAK_RD; |
| 1362 | break; |
| 1363 | case 2: /* Read/Write. */ |
| 1364 | brk.type = _DEBUG_BREAK_RW; |
| 1365 | break; |
| 1366 | default: /* Modify. */ |
| 1367 | /* FIXME: brk.type = _DEBUG_BREAK_RWM gives EINVAL for some reason. */ |
| 1368 | brk.type = _DEBUG_BREAK_RW; |
| 1369 | } |
| 1370 | brk.type |= _DEBUG_BREAK_HW; /* Always ask for HW. */ |
| 1371 | brk.addr = addr; |
| 1372 | brk.size = len; |
| 1373 | |
| 1374 | errno = devctl (ctl_fd, DCMD_PROC_BREAK, &brk, sizeof (brk), 0); |
| 1375 | if (errno != EOK) |
| 1376 | { |
| 1377 | perror ("Failed to set hardware watchpoint"); |
| 1378 | return -1; |
| 1379 | } |
| 1380 | return 0; |
| 1381 | } |
| 1382 | |
| 1383 | static int |
| 1384 | procfs_can_use_hw_breakpoint (int type, int cnt, int othertype) |
| 1385 | { |
| 1386 | return 1; |
| 1387 | } |
| 1388 | |
| 1389 | static int |
| 1390 | procfs_remove_hw_watchpoint (CORE_ADDR addr, int len, int type) |
| 1391 | { |
| 1392 | return procfs_hw_watchpoint (addr, -1, type); |
| 1393 | } |
| 1394 | |
| 1395 | static int |
| 1396 | procfs_insert_hw_watchpoint (CORE_ADDR addr, int len, int type) |
| 1397 | { |
| 1398 | return procfs_hw_watchpoint (addr, len, type); |
| 1399 | } |
| 1400 | |
| 1401 | static int |
| 1402 | procfs_stopped_by_watchpoint (void) |
| 1403 | { |
| 1404 | return 0; |
| 1405 | } |