gdb/linux-tdep.c

   1 /* Target-dependent code for GNU/Linux, architecture independent.
   2
   3    Copyright (C) 2009-2012 Free Software Foundation, Inc.
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 #include "defs.h"
  21 #include "gdbtypes.h"
  22 #include "linux-tdep.h"
  23 #include "auxv.h"
  24 #include "target.h"
  25 #include "gdbthread.h"
  26 #include "gdbcore.h"
  27 #include "regcache.h"
  28 #include "regset.h"
  29 #include "elf/common.h"
  30 #include "elf-bfd.h"            /* for elfcore_write_* */
  31 #include "inferior.h"
  32 #include "cli/cli-utils.h"
  33
  34 #include <ctype.h>
  35
  36 static struct gdbarch_data *linux_gdbarch_data_handle;
  37
  38 struct linux_gdbarch_data
  39   {
  40     struct type *siginfo_type;
  41   };
  42
  43 static void *
  44 init_linux_gdbarch_data (struct gdbarch *gdbarch)
  45 {
  46   return GDBARCH_OBSTACK_ZALLOC (gdbarch, struct linux_gdbarch_data);
  47 }
  48
  49 static struct linux_gdbarch_data *
  50 get_linux_gdbarch_data (struct gdbarch *gdbarch)
  51 {
  52   return gdbarch_data (gdbarch, linux_gdbarch_data_handle);
  53 }
  54
  55 /* This function is suitable for architectures that don't
  56    extend/override the standard siginfo structure.  */
  57
  58 struct type *
  59 linux_get_siginfo_type (struct gdbarch *gdbarch)
  60 {
  61   struct linux_gdbarch_data *linux_gdbarch_data;
  62   struct type *int_type, *uint_type, *long_type, *void_ptr_type;
  63   struct type *uid_type, *pid_type;
  64   struct type *sigval_type, *clock_type;
  65   struct type *siginfo_type, *sifields_type;
  66   struct type *type;
  67
  68   linux_gdbarch_data = get_linux_gdbarch_data (gdbarch);
  69   if (linux_gdbarch_data->siginfo_type != NULL)
  70     return linux_gdbarch_data->siginfo_type;
  71
  72   int_type = arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch),
  73                                 0, "int");
  74   uint_type = arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch),
  75                                  1, "unsigned int");
  76   long_type = arch_integer_type (gdbarch, gdbarch_long_bit (gdbarch),
  77                                  0, "long");
  78   void_ptr_type = lookup_pointer_type (builtin_type (gdbarch)->builtin_void);
  79
  80   /* sival_t */
  81   sigval_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_UNION);
  82   TYPE_NAME (sigval_type) = xstrdup ("sigval_t");
  83   append_composite_type_field (sigval_type, "sival_int", int_type);
  84   append_composite_type_field (sigval_type, "sival_ptr", void_ptr_type);
  85
  86   /* __pid_t */
  87   pid_type = arch_type (gdbarch, TYPE_CODE_TYPEDEF,
  88                         TYPE_LENGTH (int_type), "__pid_t");
  89   TYPE_TARGET_TYPE (pid_type) = int_type;
  90   TYPE_TARGET_STUB (pid_type) = 1;
  91
  92   /* __uid_t */
  93   uid_type = arch_type (gdbarch, TYPE_CODE_TYPEDEF,
  94                         TYPE_LENGTH (uint_type), "__uid_t");
  95   TYPE_TARGET_TYPE (uid_type) = uint_type;
  96   TYPE_TARGET_STUB (uid_type) = 1;
  97
  98   /* __clock_t */
  99   clock_type = arch_type (gdbarch, TYPE_CODE_TYPEDEF,
 100                           TYPE_LENGTH (long_type), "__clock_t");
 101   TYPE_TARGET_TYPE (clock_type) = long_type;
 102   TYPE_TARGET_STUB (clock_type) = 1;
 103
 104   /* _sifields */
 105   sifields_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_UNION);
 106
 107   {
 108     const int si_max_size = 128;
 109     int si_pad_size;
 110     int size_of_int = gdbarch_int_bit (gdbarch) / HOST_CHAR_BIT;
 111
 112     /* _pad */
 113     if (gdbarch_ptr_bit (gdbarch) == 64)
 114       si_pad_size = (si_max_size / size_of_int) - 4;
 115     else
 116       si_pad_size = (si_max_size / size_of_int) - 3;
 117     append_composite_type_field (sifields_type, "_pad",
 118                                  init_vector_type (int_type, si_pad_size));
 119   }
 120
 121   /* _kill */
 122   type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
 123   append_composite_type_field (type, "si_pid", pid_type);
 124   append_composite_type_field (type, "si_uid", uid_type);
 125   append_composite_type_field (sifields_type, "_kill", type);
 126
 127   /* _timer */
 128   type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
 129   append_composite_type_field (type, "si_tid", int_type);
 130   append_composite_type_field (type, "si_overrun", int_type);
 131   append_composite_type_field (type, "si_sigval", sigval_type);
 132   append_composite_type_field (sifields_type, "_timer", type);
 133
 134   /* _rt */
 135   type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
 136   append_composite_type_field (type, "si_pid", pid_type);
 137   append_composite_type_field (type, "si_uid", uid_type);
 138   append_composite_type_field (type, "si_sigval", sigval_type);
 139   append_composite_type_field (sifields_type, "_rt", type);
 140
 141   /* _sigchld */
 142   type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
 143   append_composite_type_field (type, "si_pid", pid_type);
 144   append_composite_type_field (type, "si_uid", uid_type);
 145   append_composite_type_field (type, "si_status", int_type);
 146   append_composite_type_field (type, "si_utime", clock_type);
 147   append_composite_type_field (type, "si_stime", clock_type);
 148   append_composite_type_field (sifields_type, "_sigchld", type);
 149
 150   /* _sigfault */
 151   type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
 152   append_composite_type_field (type, "si_addr", void_ptr_type);
 153   append_composite_type_field (sifields_type, "_sigfault", type);
 154
 155   /* _sigpoll */
 156   type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
 157   append_composite_type_field (type, "si_band", long_type);
 158   append_composite_type_field (type, "si_fd", int_type);
 159   append_composite_type_field (sifields_type, "_sigpoll", type);
 160
 161   /* struct siginfo */
 162   siginfo_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
 163   TYPE_NAME (siginfo_type) = xstrdup ("siginfo");
 164   append_composite_type_field (siginfo_type, "si_signo", int_type);
 165   append_composite_type_field (siginfo_type, "si_errno", int_type);
 166   append_composite_type_field (siginfo_type, "si_code", int_type);
 167   append_composite_type_field_aligned (siginfo_type,
 168                                        "_sifields", sifields_type,
 169                                        TYPE_LENGTH (long_type));
 170
 171   linux_gdbarch_data->siginfo_type = siginfo_type;
 172
 173   return siginfo_type;
 174 }
 175
 176 int
 177 linux_has_shared_address_space (void)
 178 {
 179   /* Determine whether we are running on uClinux or normal Linux
 180      kernel.  */
 181   CORE_ADDR dummy;
 182   int target_is_uclinux;
 183
 184   target_is_uclinux
 185     = (target_auxv_search (&current_target, AT_NULL, &dummy) > 0
 186        && target_auxv_search (&current_target, AT_PAGESZ, &dummy) == 0);
 187
 188   return target_is_uclinux;
 189 }
 190
 191 /* This is how we want PTIDs from core files to be printed.  */
 192
 193 static char *
 194 linux_core_pid_to_str (struct gdbarch *gdbarch, ptid_t ptid)
 195 {
 196   static char buf[80];
 197
 198   if (ptid_get_lwp (ptid) != 0)
 199     {
 200       snprintf (buf, sizeof (buf), "LWP %ld", ptid_get_lwp (ptid));
 201       return buf;
 202     }
 203
 204   return normal_pid_to_str (ptid);
 205 }
 206
 207 /* Service function for corefiles and info proc.  */
 208
 209 static void
 210 read_mapping (const char *line,
 211               ULONGEST *addr, ULONGEST *endaddr,
 212               const char **permissions, size_t *permissions_len,
 213               ULONGEST *offset,
 214               const char **device, size_t *device_len,
 215               ULONGEST *inode,
 216               const char **filename)
 217 {
 218   const char *p = line;
 219
 220   *addr = strtoulst (p, &p, 16);
 221   if (*p == '-')
 222     p++;
 223   *endaddr = strtoulst (p, &p, 16);
 224
 225   while (*p && isspace (*p))
 226     p++;
 227   *permissions = p;
 228   while (*p && !isspace (*p))
 229     p++;
 230   *permissions_len = p - *permissions;
 231
 232   *offset = strtoulst (p, &p, 16);
 233
 234   while (*p && isspace (*p))
 235     p++;
 236   *device = p;
 237   while (*p && !isspace (*p))
 238     p++;
 239   *device_len = p - *device;
 240
 241   *inode = strtoulst (p, &p, 10);
 242
 243   while (*p && isspace (*p))
 244     p++;
 245   *filename = p;
 246 }
 247
 248 /* Implement the "info proc" command.  */
 249
 250 static void
 251 linux_info_proc (struct gdbarch *gdbarch, char *args,
 252                  enum info_proc_what what)
 253 {
 254   /* A long is used for pid instead of an int to avoid a loss of precision
 255      compiler warning from the output of strtoul.  */
 256   long pid;
 257   int cmdline_f = (what == IP_MINIMAL || what == IP_CMDLINE || what == IP_ALL);
 258   int cwd_f = (what == IP_MINIMAL || what == IP_CWD || what == IP_ALL);
 259   int exe_f = (what == IP_MINIMAL || what == IP_EXE || what == IP_ALL);
 260   int mappings_f = (what == IP_MAPPINGS || what == IP_ALL);
 261   int status_f = (what == IP_STATUS || what == IP_ALL);
 262   int stat_f = (what == IP_STAT || what == IP_ALL);
 263   char filename[100];
 264   gdb_byte *data;
 265   int target_errno;
 266
 267   if (args && isdigit (args[0]))
 268     pid = strtoul (args, &args, 10);
 269   else
 270     {
 271       if (!target_has_execution)
 272         error (_("No current process: you must name one."));
 273       if (current_inferior ()->fake_pid_p)
 274         error (_("Can't determine the current process's PID: you must name one."));
 275
 276       pid = current_inferior ()->pid;
 277     }
 278
 279   args = skip_spaces (args);
 280   if (args && args[0])
 281     error (_("Too many parameters: %s"), args);
 282
 283   printf_filtered (_("process %ld\n"), pid);
 284   if (cmdline_f)
 285     {
 286       xsnprintf (filename, sizeof filename, "/proc/%ld/cmdline", pid);
 287       data = target_fileio_read_stralloc (filename);
 288       if (data)
 289         {
 290           struct cleanup *cleanup = make_cleanup (xfree, data);
 291           printf_filtered ("cmdline = '%s'\n", data);
 292           do_cleanups (cleanup);
 293         }
 294       else
 295         warning (_("unable to open /proc file '%s'"), filename);
 296     }
 297   if (cwd_f)
 298     {
 299       xsnprintf (filename, sizeof filename, "/proc/%ld/cwd", pid);
 300       data = target_fileio_readlink (filename, &target_errno);
 301       if (data)
 302         {
 303           struct cleanup *cleanup = make_cleanup (xfree, data);
 304           printf_filtered ("cwd = '%s'\n", data);
 305           do_cleanups (cleanup);
 306         }
 307       else
 308         warning (_("unable to read link '%s'"), filename);
 309     }
 310   if (exe_f)
 311     {
 312       xsnprintf (filename, sizeof filename, "/proc/%ld/exe", pid);
 313       data = target_fileio_readlink (filename, &target_errno);
 314       if (data)
 315         {
 316           struct cleanup *cleanup = make_cleanup (xfree, data);
 317           printf_filtered ("exe = '%s'\n", data);
 318           do_cleanups (cleanup);
 319         }
 320       else
 321         warning (_("unable to read link '%s'"), filename);
 322     }
 323   if (mappings_f)
 324     {
 325       xsnprintf (filename, sizeof filename, "/proc/%ld/maps", pid);
 326       data = target_fileio_read_stralloc (filename);
 327       if (data)
 328         {
 329           struct cleanup *cleanup = make_cleanup (xfree, data);
 330           char *line;
 331
 332           printf_filtered (_("Mapped address spaces:\n\n"));
 333           if (gdbarch_addr_bit (gdbarch) == 32)
 334             {
 335               printf_filtered ("\t%10s %10s %10s %10s %s\n",
 336                            "Start Addr",
 337                            "  End Addr",
 338                            "      Size", "    Offset", "objfile");
 339             }
 340           else
 341             {
 342               printf_filtered ("  %18s %18s %10s %10s %s\n",
 343                            "Start Addr",
 344                            "  End Addr",
 345                            "      Size", "    Offset", "objfile");
 346             }
 347
 348           for (line = strtok (data, "\n"); line; line = strtok (NULL, "\n"))
 349             {
 350               ULONGEST addr, endaddr, offset, inode;
 351               const char *permissions, *device, *filename;
 352               size_t permissions_len, device_len;
 353
 354               read_mapping (line, &addr, &endaddr,
 355                             &permissions, &permissions_len,
 356                             &offset, &device, &device_len,
 357                             &inode, &filename);
 358
 359               if (gdbarch_addr_bit (gdbarch) == 32)
 360                 {
 361                   printf_filtered ("\t%10s %10s %10s %10s %s\n",
 362                                    paddress (gdbarch, addr),
 363                                    paddress (gdbarch, endaddr),
 364                                    hex_string (endaddr - addr),
 365                                    hex_string (offset),
 366                                    *filename? filename : "");
 367                 }
 368               else
 369                 {
 370                   printf_filtered ("  %18s %18s %10s %10s %s\n",
 371                                    paddress (gdbarch, addr),
 372                                    paddress (gdbarch, endaddr),
 373                                    hex_string (endaddr - addr),
 374                                    hex_string (offset),
 375                                    *filename? filename : "");
 376                 }
 377             }
 378
 379           do_cleanups (cleanup);
 380         }
 381       else
 382         warning (_("unable to open /proc file '%s'"), filename);
 383     }
 384   if (status_f)
 385     {
 386       xsnprintf (filename, sizeof filename, "/proc/%ld/status", pid);
 387       data = target_fileio_read_stralloc (filename);
 388       if (data)
 389         {
 390           struct cleanup *cleanup = make_cleanup (xfree, data);
 391           puts_filtered (data);
 392           do_cleanups (cleanup);
 393         }
 394       else
 395         warning (_("unable to open /proc file '%s'"), filename);
 396     }
 397   if (stat_f)
 398     {
 399       xsnprintf (filename, sizeof filename, "/proc/%ld/stat", pid);
 400       data = target_fileio_read_stralloc (filename);
 401       if (data)
 402         {
 403           struct cleanup *cleanup = make_cleanup (xfree, data);
 404           const char *p = data;
 405           const char *ep;
 406           ULONGEST val;
 407
 408           printf_filtered (_("Process: %s\n"),
 409                            pulongest (strtoulst (p, &p, 10)));
 410
 411           while (*p && isspace (*p))
 412             p++;
 413           if (*p == '(' && (ep = strchr (p, ')')) != NULL)
 414             {
 415               printf_filtered ("Exec file: %.*s\n", (int) (ep - p - 1), p + 1);
 416               p = ep + 1;
 417             }
 418
 419           while (*p && isspace (*p))
 420             p++;
 421           if (*p)
 422             printf_filtered (_("State: %c\n"), *p++);
 423
 424           if (*p)
 425             printf_filtered (_("Parent process: %s\n"),
 426                              pulongest (strtoulst (p, &p, 10)));
 427           if (*p)
 428             printf_filtered (_("Process group: %s\n"),
 429                              pulongest (strtoulst (p, &p, 10)));
 430           if (*p)
 431             printf_filtered (_("Session id: %s\n"),
 432                              pulongest (strtoulst (p, &p, 10)));
 433           if (*p)
 434             printf_filtered (_("TTY: %s\n"),
 435                              pulongest (strtoulst (p, &p, 10)));
 436           if (*p)
 437             printf_filtered (_("TTY owner process group: %s\n"),
 438                              pulongest (strtoulst (p, &p, 10)));
 439
 440           if (*p)
 441             printf_filtered (_("Flags: %s\n"),
 442                              hex_string (strtoulst (p, &p, 10)));
 443           if (*p)
 444             printf_filtered (_("Minor faults (no memory page): %s\n"),
 445                              pulongest (strtoulst (p, &p, 10)));
 446           if (*p)
 447             printf_filtered (_("Minor faults, children: %s\n"),
 448                              pulongest (strtoulst (p, &p, 10)));
 449           if (*p)
 450             printf_filtered (_("Major faults (memory page faults): %s\n"),
 451                              pulongest (strtoulst (p, &p, 10)));
 452           if (*p)
 453             printf_filtered (_("Major faults, children: %s\n"),
 454                              pulongest (strtoulst (p, &p, 10)));
 455           if (*p)
 456             printf_filtered (_("utime: %s\n"),
 457                              pulongest (strtoulst (p, &p, 10)));
 458           if (*p)
 459             printf_filtered (_("stime: %s\n"),
 460                              pulongest (strtoulst (p, &p, 10)));
 461           if (*p)
 462             printf_filtered (_("utime, children: %s\n"),
 463                              pulongest (strtoulst (p, &p, 10)));
 464           if (*p)
 465             printf_filtered (_("stime, children: %s\n"),
 466                              pulongest (strtoulst (p, &p, 10)));
 467           if (*p)
 468             printf_filtered (_("jiffies remaining in current "
 469                                "time slice: %s\n"),
 470                              pulongest (strtoulst (p, &p, 10)));
 471           if (*p)
 472             printf_filtered (_("'nice' value: %s\n"),
 473                              pulongest (strtoulst (p, &p, 10)));
 474           if (*p)
 475             printf_filtered (_("jiffies until next timeout: %s\n"),
 476                              pulongest (strtoulst (p, &p, 10)));
 477           if (*p)
 478             printf_filtered (_("jiffies until next SIGALRM: %s\n"),
 479                              pulongest (strtoulst (p, &p, 10)));
 480           if (*p)
 481             printf_filtered (_("start time (jiffies since "
 482                                "system boot): %s\n"),
 483                              pulongest (strtoulst (p, &p, 10)));
 484           if (*p)
 485             printf_filtered (_("Virtual memory size: %s\n"),
 486                              pulongest (strtoulst (p, &p, 10)));
 487           if (*p)
 488             printf_filtered (_("Resident set size: %s\n"),
 489                              pulongest (strtoulst (p, &p, 10)));
 490           if (*p)
 491             printf_filtered (_("rlim: %s\n"),
 492                              pulongest (strtoulst (p, &p, 10)));
 493           if (*p)
 494             printf_filtered (_("Start of text: %s\n"),
 495                              hex_string (strtoulst (p, &p, 10)));
 496           if (*p)
 497             printf_filtered (_("End of text: %s\n"),
 498                              hex_string (strtoulst (p, &p, 10)));
 499           if (*p)
 500             printf_filtered (_("Start of stack: %s\n"),
 501                              hex_string (strtoulst (p, &p, 10)));
 502 #if 0   /* Don't know how architecture-dependent the rest is...
 503            Anyway the signal bitmap info is available from "status".  */
 504           if (*p)
 505             printf_filtered (_("Kernel stack pointer: %s\n"),
 506                              hex_string (strtoulst (p, &p, 10)));
 507           if (*p)
 508             printf_filtered (_("Kernel instr pointer: %s\n"),
 509                              hex_string (strtoulst (p, &p, 10)));
 510           if (*p)
 511             printf_filtered (_("Pending signals bitmap: %s\n"),
 512                              hex_string (strtoulst (p, &p, 10)));
 513           if (*p)
 514             printf_filtered (_("Blocked signals bitmap: %s\n"),
 515                              hex_string (strtoulst (p, &p, 10)));
 516           if (*p)
 517             printf_filtered (_("Ignored signals bitmap: %s\n"),
 518                              hex_string (strtoulst (p, &p, 10)));
 519           if (*p)
 520             printf_filtered (_("Catched signals bitmap: %s\n"),
 521                              hex_string (strtoulst (p, &p, 10)));
 522           if (*p)
 523             printf_filtered (_("wchan (system call): %s\n"),
 524                              hex_string (strtoulst (p, &p, 10)));
 525 #endif
 526           do_cleanups (cleanup);
 527         }
 528       else
 529         warning (_("unable to open /proc file '%s'"), filename);
 530     }
 531 }
 532
 533 /* Determine which signal stopped execution.  */
 534
 535 static int
 536 find_signalled_thread (struct thread_info *info, void *data)
 537 {
 538   if (info->suspend.stop_signal != TARGET_SIGNAL_0
 539       && ptid_get_pid (info->ptid) == ptid_get_pid (inferior_ptid))
 540     return 1;
 541
 542   return 0;
 543 }
 544
 545 static enum target_signal
 546 find_stop_signal (void)
 547 {
 548   struct thread_info *info =
 549     iterate_over_threads (find_signalled_thread, NULL);
 550
 551   if (info)
 552     return info->suspend.stop_signal;
 553   else
 554     return TARGET_SIGNAL_0;
 555 }
 556
 557 /* Generate corefile notes for SPU contexts.  */
 558
 559 static char *
 560 linux_spu_make_corefile_notes (bfd *obfd, char *note_data, int *note_size)
 561 {
 562   static const char *spu_files[] =
 563     {
 564       "object-id",
 565       "mem",
 566       "regs",
 567       "fpcr",
 568       "lslr",
 569       "decr",
 570       "decr_status",
 571       "signal1",
 572       "signal1_type",
 573       "signal2",
 574       "signal2_type",
 575       "event_mask",
 576       "event_status",
 577       "mbox_info",
 578       "ibox_info",
 579       "wbox_info",
 580       "dma_info",
 581       "proxydma_info",
 582    };
 583
 584   enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch);
 585   gdb_byte *spu_ids;
 586   LONGEST i, j, size;
 587
 588   /* Determine list of SPU ids.  */
 589   size = target_read_alloc (&current_target, TARGET_OBJECT_SPU,
 590                             NULL, &spu_ids);
 591
 592   /* Generate corefile notes for each SPU file.  */
 593   for (i = 0; i < size; i += 4)
 594     {
 595       int fd = extract_unsigned_integer (spu_ids + i, 4, byte_order);
 596
 597       for (j = 0; j < sizeof (spu_files) / sizeof (spu_files[0]); j++)
 598         {
 599           char annex[32], note_name[32];
 600           gdb_byte *spu_data;
 601           LONGEST spu_len;
 602
 603           xsnprintf (annex, sizeof annex, "%d/%s", fd, spu_files[j]);
 604           spu_len = target_read_alloc (&current_target, TARGET_OBJECT_SPU,
 605                                        annex, &spu_data);
 606           if (spu_len > 0)
 607             {
 608               xsnprintf (note_name, sizeof note_name, "SPU/%s", annex);
 609               note_data = elfcore_write_note (obfd, note_data, note_size,
 610                                               note_name, NT_SPU,
 611                                               spu_data, spu_len);
 612               xfree (spu_data);
 613
 614               if (!note_data)
 615                 {
 616                   xfree (spu_ids);
 617                   return NULL;
 618                 }
 619             }
 620         }
 621     }
 622
 623   if (size > 0)
 624     xfree (spu_ids);
 625
 626   return note_data;
 627 }
 628
 629 /* Records the thread's register state for the corefile note
 630    section.  */
 631
 632 static char *
 633 linux_collect_thread_registers (const struct regcache *regcache,
 634                                 ptid_t ptid, bfd *obfd,
 635                                 char *note_data, int *note_size,
 636                                 enum target_signal stop_signal)
 637 {
 638   struct gdbarch *gdbarch = get_regcache_arch (regcache);
 639   struct core_regset_section *sect_list;
 640   unsigned long lwp;
 641
 642   sect_list = gdbarch_core_regset_sections (gdbarch);
 643   gdb_assert (sect_list);
 644
 645   /* For remote targets the LWP may not be available, so use the TID.  */
 646   lwp = ptid_get_lwp (ptid);
 647   if (!lwp)
 648     lwp = ptid_get_tid (ptid);
 649
 650   while (sect_list->sect_name != NULL)
 651     {
 652       const struct regset *regset;
 653       char *buf;
 654
 655       regset = gdbarch_regset_from_core_section (gdbarch,
 656                                                  sect_list->sect_name,
 657                                                  sect_list->size);
 658       gdb_assert (regset && regset->collect_regset);
 659
 660       buf = xmalloc (sect_list->size);
 661       regset->collect_regset (regset, regcache, -1, buf, sect_list->size);
 662
 663       /* PRSTATUS still needs to be treated specially.  */
 664       if (strcmp (sect_list->sect_name, ".reg") == 0)
 665         note_data = (char *) elfcore_write_prstatus
 666                                (obfd, note_data, note_size, lwp,
 667                                 target_signal_to_host (stop_signal), buf);
 668       else
 669         note_data = (char *) elfcore_write_register_note
 670                                (obfd, note_data, note_size,
 671                                 sect_list->sect_name, buf, sect_list->size);
 672       xfree (buf);
 673       sect_list++;
 674
 675       if (!note_data)
 676         return NULL;
 677     }
 678
 679   return note_data;
 680 }
 681
 682 struct linux_corefile_thread_data
 683 {
 684   struct gdbarch *gdbarch;
 685   int pid;
 686   bfd *obfd;
 687   char *note_data;
 688   int *note_size;
 689   int num_notes;
 690   enum target_signal stop_signal;
 691   linux_collect_thread_registers_ftype collect;
 692 };
 693
 694 /* Called by gdbthread.c once per thread.  Records the thread's
 695    register state for the corefile note section.  */
 696
 697 static int
 698 linux_corefile_thread_callback (struct thread_info *info, void *data)
 699 {
 700   struct linux_corefile_thread_data *args = data;
 701
 702   if (ptid_get_pid (info->ptid) == args->pid)
 703     {
 704       struct cleanup *old_chain;
 705       struct regcache *regcache;
 706       regcache = get_thread_arch_regcache (info->ptid, args->gdbarch);
 707
 708       old_chain = save_inferior_ptid ();
 709       inferior_ptid = info->ptid;
 710       target_fetch_registers (regcache, -1);
 711       do_cleanups (old_chain);
 712
 713       args->note_data = args->collect (regcache, info->ptid, args->obfd,
 714                                        args->note_data, args->note_size,
 715                                        args->stop_signal);
 716       args->num_notes++;
 717     }
 718
 719   return !args->note_data;
 720 }
 721
 722 /* Fills the "to_make_corefile_note" target vector.  Builds the note
 723    section for a corefile, and returns it in a malloc buffer.  */
 724
 725 char *
 726 linux_make_corefile_notes (struct gdbarch *gdbarch, bfd *obfd, int *note_size,
 727                            linux_collect_thread_registers_ftype collect)
 728 {
 729   struct linux_corefile_thread_data thread_args;
 730   char *note_data = NULL;
 731   gdb_byte *auxv;
 732   int auxv_len;
 733
 734   /* Process information.  */
 735   if (get_exec_file (0))
 736     {
 737       const char *fname = lbasename (get_exec_file (0));
 738       char *psargs = xstrdup (fname);
 739
 740       if (get_inferior_args ())
 741         psargs = reconcat (psargs, psargs, " ", get_inferior_args (),
 742                            (char *) NULL);
 743
 744       note_data = elfcore_write_prpsinfo (obfd, note_data, note_size,
 745                                           fname, psargs);
 746       xfree (psargs);
 747
 748       if (!note_data)
 749         return NULL;
 750     }
 751
 752   /* Thread register information.  */
 753   thread_args.gdbarch = gdbarch;
 754   thread_args.pid = ptid_get_pid (inferior_ptid);
 755   thread_args.obfd = obfd;
 756   thread_args.note_data = note_data;
 757   thread_args.note_size = note_size;
 758   thread_args.num_notes = 0;
 759   thread_args.stop_signal = find_stop_signal ();
 760   thread_args.collect = collect;
 761   iterate_over_threads (linux_corefile_thread_callback, &thread_args);
 762   note_data = thread_args.note_data;
 763   if (!note_data)
 764     return NULL;
 765
 766   /* Auxillary vector.  */
 767   auxv_len = target_read_alloc (&current_target, TARGET_OBJECT_AUXV,
 768                                 NULL, &auxv);
 769   if (auxv_len > 0)
 770     {
 771       note_data = elfcore_write_note (obfd, note_data, note_size,
 772                                       "CORE", NT_AUXV, auxv, auxv_len);
 773       xfree (auxv);
 774
 775       if (!note_data)
 776         return NULL;
 777     }
 778
 779   /* SPU information.  */
 780   note_data = linux_spu_make_corefile_notes (obfd, note_data, note_size);
 781   if (!note_data)
 782     return NULL;
 783
 784   make_cleanup (xfree, note_data);
 785   return note_data;
 786 }
 787
 788 static char *
 789 linux_make_corefile_notes_1 (struct gdbarch *gdbarch, bfd *obfd, int *note_size)
 790 {
 791   /* FIXME: uweigand/2011-10-06: Once all GNU/Linux architectures have been
 792      converted to gdbarch_core_regset_sections, we no longer need to fall back
 793      to the target method at this point.  */
 794
 795   if (!gdbarch_core_regset_sections (gdbarch))
 796     return target_make_corefile_notes (obfd, note_size);
 797   else
 798     return linux_make_corefile_notes (gdbarch, obfd, note_size,
 799                                       linux_collect_thread_registers);
 800 }
 801
 802 /* To be called from the various GDB_OSABI_LINUX handlers for the
 803    various GNU/Linux architectures and machine types.  */
 804
 805 void
 806 linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
 807 {
 808   set_gdbarch_core_pid_to_str (gdbarch, linux_core_pid_to_str);
 809   set_gdbarch_info_proc (gdbarch, linux_info_proc);
 810   set_gdbarch_make_corefile_notes (gdbarch, linux_make_corefile_notes_1);
 811 }
 812
 813 void
 814 _initialize_linux_tdep (void)
 815 {
 816   linux_gdbarch_data_handle =
 817     gdbarch_data_register_post_init (init_linux_gdbarch_data);
 818 }