gdb/fbsd-tdep.c

   1 /* Target-dependent code for FreeBSD, architecture-independent.
   2
   3    Copyright (C) 2002-2019 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 "auxv.h"
  22 #include "gdbcore.h"
  23 #include "inferior.h"
  24 #include "regcache.h"
  25 #include "regset.h"
  26 #include "gdbthread.h"
  27 #include "objfiles.h"
  28 #include "xml-syscall.h"
  29 #include <sys/socket.h>
  30 #include <arpa/inet.h>
  31
  32 #include "elf-bfd.h"
  33 #include "fbsd-tdep.h"
  34
  35 /* This enum is derived from FreeBSD's <sys/signal.h>.  */
  36
  37 enum
  38   {
  39     FREEBSD_SIGHUP = 1,
  40     FREEBSD_SIGINT = 2,
  41     FREEBSD_SIGQUIT = 3,
  42     FREEBSD_SIGILL = 4,
  43     FREEBSD_SIGTRAP = 5,
  44     FREEBSD_SIGABRT = 6,
  45     FREEBSD_SIGEMT = 7,
  46     FREEBSD_SIGFPE = 8,
  47     FREEBSD_SIGKILL = 9,
  48     FREEBSD_SIGBUS = 10,
  49     FREEBSD_SIGSEGV = 11,
  50     FREEBSD_SIGSYS = 12,
  51     FREEBSD_SIGPIPE = 13,
  52     FREEBSD_SIGALRM = 14,
  53     FREEBSD_SIGTERM = 15,
  54     FREEBSD_SIGURG = 16,
  55     FREEBSD_SIGSTOP = 17,
  56     FREEBSD_SIGTSTP = 18,
  57     FREEBSD_SIGCONT = 19,
  58     FREEBSD_SIGCHLD = 20,
  59     FREEBSD_SIGTTIN = 21,
  60     FREEBSD_SIGTTOU = 22,
  61     FREEBSD_SIGIO = 23,
  62     FREEBSD_SIGXCPU = 24,
  63     FREEBSD_SIGXFSZ = 25,
  64     FREEBSD_SIGVTALRM = 26,
  65     FREEBSD_SIGPROF = 27,
  66     FREEBSD_SIGWINCH = 28,
  67     FREEBSD_SIGINFO = 29,
  68     FREEBSD_SIGUSR1 = 30,
  69     FREEBSD_SIGUSR2 = 31,
  70     FREEBSD_SIGTHR = 32,
  71     FREEBSD_SIGLIBRT = 33,
  72     FREEBSD_SIGRTMIN = 65,
  73     FREEBSD_SIGRTMAX = 126,
  74   };
  75
  76 /* FreeBSD kernels 12.0 and later include a copy of the
  77    'ptrace_lwpinfo' structure returned by the PT_LWPINFO ptrace
  78    operation in an ELF core note (NT_FREEBSD_PTLWPINFO) for each LWP.
  79    The constants below define the offset of field members and flags in
  80    this structure used by methods in this file.  Note that the
  81    'ptrace_lwpinfo' struct in the note is preceded by a 4 byte integer
  82    containing the size of the structure.  */
  83
  84 #define LWPINFO_OFFSET          0x4
  85
  86 /* Offsets in ptrace_lwpinfo.  */
  87 #define LWPINFO_PL_FLAGS        0x8
  88 #define LWPINFO64_PL_SIGINFO    0x30
  89 #define LWPINFO32_PL_SIGINFO    0x2c
  90
  91 /* Flags in pl_flags.  */
  92 #define PL_FLAG_SI      0x20    /* siginfo is valid */
  93
  94 /* Sizes of siginfo_t.  */
  95 #define SIZE64_SIGINFO_T        80
  96 #define SIZE32_SIGINFO_T        64
  97
  98 /* Offsets in data structure used in NT_FREEBSD_PROCSTAT_VMMAP core
  99    dump notes.  See <sys/user.h> for the definition of struct
 100    kinfo_vmentry.  This data structure should have the same layout on
 101    all architectures.
 102
 103    Note that FreeBSD 7.0 used an older version of this structure
 104    (struct kinfo_vmentry), but the NT_FREEBSD_PROCSTAT_VMMAP core
 105    dump note wasn't introduced until FreeBSD 9.2.  As a result, the
 106    core dump note has always used the 7.1 and later structure
 107    format.  */
 108
 109 #define KVE_STRUCTSIZE          0x0
 110 #define KVE_START               0x8
 111 #define KVE_END                 0x10
 112 #define KVE_OFFSET              0x18
 113 #define KVE_FLAGS               0x2c
 114 #define KVE_PROTECTION          0x38
 115 #define KVE_PATH                0x88
 116
 117 /* Flags in the 'kve_protection' field in struct kinfo_vmentry.  These
 118    match the KVME_PROT_* constants in <sys/user.h>.  */
 119
 120 #define KINFO_VME_PROT_READ     0x00000001
 121 #define KINFO_VME_PROT_WRITE    0x00000002
 122 #define KINFO_VME_PROT_EXEC     0x00000004
 123
 124 /* Flags in the 'kve_flags' field in struct kinfo_vmentry.  These
 125    match the KVME_FLAG_* constants in <sys/user.h>.  */
 126
 127 #define KINFO_VME_FLAG_COW              0x00000001
 128 #define KINFO_VME_FLAG_NEEDS_COPY       0x00000002
 129 #define KINFO_VME_FLAG_NOCOREDUMP       0x00000004
 130 #define KINFO_VME_FLAG_SUPER            0x00000008
 131 #define KINFO_VME_FLAG_GROWS_UP         0x00000010
 132 #define KINFO_VME_FLAG_GROWS_DOWN       0x00000020
 133
 134 /* Offsets in data structure used in NT_FREEBSD_PROCSTAT_FILES core
 135    dump notes.  See <sys/user.h> for the definition of struct
 136    kinfo_file.  This data structure should have the same layout on all
 137    architectures.
 138
 139    Note that FreeBSD 7.0 used an older version of this structure
 140    (struct kinfo_ofile), but the NT_FREEBSD_PROCSTAT_FILES core dump
 141    note wasn't introduced until FreeBSD 9.2.  As a result, the core
 142    dump note has always used the 7.1 and later structure format.  */
 143
 144 #define KF_STRUCTSIZE           0x0
 145 #define KF_TYPE                 0x4
 146 #define KF_FD                   0x8
 147 #define KF_FLAGS                0x10
 148 #define KF_OFFSET               0x18
 149 #define KF_VNODE_TYPE           0x20
 150 #define KF_SOCK_DOMAIN          0x24
 151 #define KF_SOCK_TYPE            0x28
 152 #define KF_SOCK_PROTOCOL        0x2c
 153 #define KF_SA_LOCAL             0x30
 154 #define KF_SA_PEER              0xb0
 155 #define KF_PATH                 0x170
 156
 157 /* Constants for the 'kf_type' field in struct kinfo_file.  These
 158    match the KF_TYPE_* constants in <sys/user.h>.  */
 159
 160 #define KINFO_FILE_TYPE_VNODE   1
 161 #define KINFO_FILE_TYPE_SOCKET  2
 162 #define KINFO_FILE_TYPE_PIPE    3
 163 #define KINFO_FILE_TYPE_FIFO    4
 164 #define KINFO_FILE_TYPE_KQUEUE  5
 165 #define KINFO_FILE_TYPE_CRYPTO  6
 166 #define KINFO_FILE_TYPE_MQUEUE  7
 167 #define KINFO_FILE_TYPE_SHM     8
 168 #define KINFO_FILE_TYPE_SEM     9
 169 #define KINFO_FILE_TYPE_PTS     10
 170 #define KINFO_FILE_TYPE_PROCDESC 11
 171
 172 /* Special values for the 'kf_fd' field in struct kinfo_file.  These
 173    match the KF_FD_TYPE_* constants in <sys/user.h>.  */
 174
 175 #define KINFO_FILE_FD_TYPE_CWD  -1
 176 #define KINFO_FILE_FD_TYPE_ROOT -2
 177 #define KINFO_FILE_FD_TYPE_JAIL -3
 178 #define KINFO_FILE_FD_TYPE_TRACE -4
 179 #define KINFO_FILE_FD_TYPE_TEXT -5
 180 #define KINFO_FILE_FD_TYPE_CTTY -6
 181
 182 /* Flags in the 'kf_flags' field in struct kinfo_file.  These match
 183    the KF_FLAG_* constants in <sys/user.h>.  */
 184
 185 #define KINFO_FILE_FLAG_READ            0x00000001
 186 #define KINFO_FILE_FLAG_WRITE           0x00000002
 187 #define KINFO_FILE_FLAG_APPEND          0x00000004
 188 #define KINFO_FILE_FLAG_ASYNC           0x00000008
 189 #define KINFO_FILE_FLAG_FSYNC           0x00000010
 190 #define KINFO_FILE_FLAG_NONBLOCK        0x00000020
 191 #define KINFO_FILE_FLAG_DIRECT          0x00000040
 192 #define KINFO_FILE_FLAG_HASLOCK         0x00000080
 193 #define KINFO_FILE_FLAG_EXEC            0x00004000
 194
 195 /* Constants for the 'kf_vnode_type' field in struct kinfo_file.
 196    These match the KF_VTYPE_* constants in <sys/user.h>.  */
 197
 198 #define KINFO_FILE_VTYPE_VREG   1
 199 #define KINFO_FILE_VTYPE_VDIR   2
 200 #define KINFO_FILE_VTYPE_VCHR   4
 201 #define KINFO_FILE_VTYPE_VLNK   5
 202 #define KINFO_FILE_VTYPE_VSOCK  6
 203 #define KINFO_FILE_VTYPE_VFIFO  7
 204
 205 /* Constants for socket address families.  These match AF_* constants
 206    in <sys/socket.h>.  */
 207
 208 #define FBSD_AF_UNIX            1
 209 #define FBSD_AF_INET            2
 210 #define FBSD_AF_INET6           28
 211
 212 /* Constants for socket types.  These match SOCK_* constants in
 213    <sys/socket.h>.  */
 214
 215 #define FBSD_SOCK_STREAM        1
 216 #define FBSD_SOCK_DGRAM         2
 217 #define FBSD_SOCK_SEQPACKET     5
 218
 219 /* Constants for IP protocols.  These match IPPROTO_* constants in
 220    <netinet/in.h>.  */
 221
 222 #define FBSD_IPPROTO_ICMP       1
 223 #define FBSD_IPPROTO_TCP        6
 224 #define FBSD_IPPROTO_UDP        17
 225 #define FBSD_IPPROTO_SCTP       132
 226
 227 /* Socket address structures.  These have the same layout on all
 228    FreeBSD architectures.  In addition, multibyte fields such as IP
 229    addresses are always stored in network byte order.  */
 230
 231 struct fbsd_sockaddr_in
 232 {
 233   uint8_t sin_len;
 234   uint8_t sin_family;
 235   uint8_t sin_port[2];
 236   uint8_t sin_addr[4];
 237   char sin_zero[8];
 238 };
 239
 240 struct fbsd_sockaddr_in6
 241 {
 242   uint8_t sin6_len;
 243   uint8_t sin6_family;
 244   uint8_t sin6_port[2];
 245   uint32_t sin6_flowinfo;
 246   uint8_t sin6_addr[16];
 247   uint32_t sin6_scope_id;
 248 };
 249
 250 struct fbsd_sockaddr_un
 251 {
 252   uint8_t sun_len;
 253   uint8_t sun_family;
 254   char sun_path[104];
 255 };
 256
 257 /* Number of 32-bit words in a signal set.  This matches _SIG_WORDS in
 258    <sys/_sigset.h> and is the same value on all architectures.  */
 259
 260 #define SIG_WORDS               4
 261
 262 /* Offsets in data structure used in NT_FREEBSD_PROCSTAT_PROC core
 263    dump notes.  See <sys/user.h> for the definition of struct
 264    kinfo_proc.  This data structure has different layouts on different
 265    architectures mostly due to ILP32 vs LP64.  However, FreeBSD/i386
 266    uses a 32-bit time_t while all other architectures use a 64-bit
 267    time_t.
 268
 269    The core dump note actually contains one kinfo_proc structure for
 270    each thread, but all of the process-wide data can be obtained from
 271    the first structure.  One result of this note's format is that some
 272    of the process-wide status available in the native target method
 273    from the kern.proc.pid.<pid> sysctl such as ki_stat and ki_siglist
 274    is not available from a core dump.  Instead, the per-thread data
 275    structures contain the value of these fields for individual
 276    threads.  */
 277
 278 struct kinfo_proc_layout
 279 {
 280   /* Offsets of struct kinfo_proc members.  */
 281   int ki_layout;
 282   int ki_pid;
 283   int ki_ppid;
 284   int ki_pgid;
 285   int ki_tpgid;
 286   int ki_sid;
 287   int ki_tdev_freebsd11;
 288   int ki_sigignore;
 289   int ki_sigcatch;
 290   int ki_uid;
 291   int ki_ruid;
 292   int ki_svuid;
 293   int ki_rgid;
 294   int ki_svgid;
 295   int ki_ngroups;
 296   int ki_groups;
 297   int ki_size;
 298   int ki_rssize;
 299   int ki_tsize;
 300   int ki_dsize;
 301   int ki_ssize;
 302   int ki_start;
 303   int ki_nice;
 304   int ki_comm;
 305   int ki_tdev;
 306   int ki_rusage;
 307   int ki_rusage_ch;
 308
 309   /* Offsets of struct rusage members.  */
 310   int ru_utime;
 311   int ru_stime;
 312   int ru_maxrss;
 313   int ru_minflt;
 314   int ru_majflt;
 315 };
 316
 317 const struct kinfo_proc_layout kinfo_proc_layout_32 =
 318   {
 319     .ki_layout = 0x4,
 320     .ki_pid = 0x28,
 321     .ki_ppid = 0x2c,
 322     .ki_pgid = 0x30,
 323     .ki_tpgid = 0x34,
 324     .ki_sid = 0x38,
 325     .ki_tdev_freebsd11 = 0x44,
 326     .ki_sigignore = 0x68,
 327     .ki_sigcatch = 0x78,
 328     .ki_uid = 0x88,
 329     .ki_ruid = 0x8c,
 330     .ki_svuid = 0x90,
 331     .ki_rgid = 0x94,
 332     .ki_svgid = 0x98,
 333     .ki_ngroups = 0x9c,
 334     .ki_groups = 0xa0,
 335     .ki_size = 0xe0,
 336     .ki_rssize = 0xe4,
 337     .ki_tsize = 0xec,
 338     .ki_dsize = 0xf0,
 339     .ki_ssize = 0xf4,
 340     .ki_start = 0x118,
 341     .ki_nice = 0x145,
 342     .ki_comm = 0x17f,
 343     .ki_tdev = 0x1f0,
 344     .ki_rusage = 0x220,
 345     .ki_rusage_ch = 0x278,
 346
 347     .ru_utime = 0x0,
 348     .ru_stime = 0x10,
 349     .ru_maxrss = 0x20,
 350     .ru_minflt = 0x30,
 351     .ru_majflt = 0x34,
 352   };
 353
 354 const struct kinfo_proc_layout kinfo_proc_layout_i386 =
 355   {
 356     .ki_layout = 0x4,
 357     .ki_pid = 0x28,
 358     .ki_ppid = 0x2c,
 359     .ki_pgid = 0x30,
 360     .ki_tpgid = 0x34,
 361     .ki_sid = 0x38,
 362     .ki_tdev_freebsd11 = 0x44,
 363     .ki_sigignore = 0x68,
 364     .ki_sigcatch = 0x78,
 365     .ki_uid = 0x88,
 366     .ki_ruid = 0x8c,
 367     .ki_svuid = 0x90,
 368     .ki_rgid = 0x94,
 369     .ki_svgid = 0x98,
 370     .ki_ngroups = 0x9c,
 371     .ki_groups = 0xa0,
 372     .ki_size = 0xe0,
 373     .ki_rssize = 0xe4,
 374     .ki_tsize = 0xec,
 375     .ki_dsize = 0xf0,
 376     .ki_ssize = 0xf4,
 377     .ki_start = 0x118,
 378     .ki_nice = 0x135,
 379     .ki_comm = 0x16f,
 380     .ki_tdev = 0x1e0,
 381     .ki_rusage = 0x210,
 382     .ki_rusage_ch = 0x258,
 383
 384     .ru_utime = 0x0,
 385     .ru_stime = 0x8,
 386     .ru_maxrss = 0x10,
 387     .ru_minflt = 0x20,
 388     .ru_majflt = 0x24,
 389   };
 390
 391 const struct kinfo_proc_layout kinfo_proc_layout_64 =
 392   {
 393     .ki_layout = 0x4,
 394     .ki_pid = 0x48,
 395     .ki_ppid = 0x4c,
 396     .ki_pgid = 0x50,
 397     .ki_tpgid = 0x54,
 398     .ki_sid = 0x58,
 399     .ki_tdev_freebsd11 = 0x64,
 400     .ki_sigignore = 0x88,
 401     .ki_sigcatch = 0x98,
 402     .ki_uid = 0xa8,
 403     .ki_ruid = 0xac,
 404     .ki_svuid = 0xb0,
 405     .ki_rgid = 0xb4,
 406     .ki_svgid = 0xb8,
 407     .ki_ngroups = 0xbc,
 408     .ki_groups = 0xc0,
 409     .ki_size = 0x100,
 410     .ki_rssize = 0x108,
 411     .ki_tsize = 0x118,
 412     .ki_dsize = 0x120,
 413     .ki_ssize = 0x128,
 414     .ki_start = 0x150,
 415     .ki_nice = 0x185,
 416     .ki_comm = 0x1bf,
 417     .ki_tdev = 0x230,
 418     .ki_rusage = 0x260,
 419     .ki_rusage_ch = 0x2f0,
 420
 421     .ru_utime = 0x0,
 422     .ru_stime = 0x10,
 423     .ru_maxrss = 0x20,
 424     .ru_minflt = 0x40,
 425     .ru_majflt = 0x48,
 426   };
 427
 428 static struct gdbarch_data *fbsd_gdbarch_data_handle;
 429
 430 struct fbsd_gdbarch_data
 431   {
 432     struct type *siginfo_type;
 433   };
 434
 435 static void *
 436 init_fbsd_gdbarch_data (struct gdbarch *gdbarch)
 437 {
 438   return GDBARCH_OBSTACK_ZALLOC (gdbarch, struct fbsd_gdbarch_data);
 439 }
 440
 441 static struct fbsd_gdbarch_data *
 442 get_fbsd_gdbarch_data (struct gdbarch *gdbarch)
 443 {
 444   return ((struct fbsd_gdbarch_data *)
 445           gdbarch_data (gdbarch, fbsd_gdbarch_data_handle));
 446 }
 447
 448 struct fbsd_pspace_data
 449 {
 450   /* Offsets in the runtime linker's 'Obj_Entry' structure.  */
 451   LONGEST off_linkmap = 0;
 452   LONGEST off_tlsindex = 0;
 453   bool rtld_offsets_valid = false;
 454 };
 455
 456 /* Per-program-space data for FreeBSD architectures.  */
 457 static const struct program_space_key<fbsd_pspace_data>
 458   fbsd_pspace_data_handle;
 459
 460 static struct fbsd_pspace_data *
 461 get_fbsd_pspace_data (struct program_space *pspace)
 462 {
 463   struct fbsd_pspace_data *data;
 464
 465   data = fbsd_pspace_data_handle.get (pspace);
 466   if (data == NULL)
 467     data = fbsd_pspace_data_handle.emplace (pspace);
 468
 469   return data;
 470 }
 471
 472 /* This is how we want PTIDs from core files to be printed.  */
 473
 474 static std::string
 475 fbsd_core_pid_to_str (struct gdbarch *gdbarch, ptid_t ptid)
 476 {
 477   if (ptid.lwp () != 0)
 478     return string_printf ("LWP %ld", ptid.lwp ());
 479
 480   return normal_pid_to_str (ptid);
 481 }
 482
 483 /* Extract the name assigned to a thread from a core.  Returns the
 484    string in a static buffer.  */
 485
 486 static const char *
 487 fbsd_core_thread_name (struct gdbarch *gdbarch, struct thread_info *thr)
 488 {
 489   static char buf[80];
 490   struct bfd_section *section;
 491   bfd_size_type size;
 492
 493   if (thr->ptid.lwp () != 0)
 494     {
 495       /* FreeBSD includes a NT_FREEBSD_THRMISC note for each thread
 496          whose contents are defined by a "struct thrmisc" declared in
 497          <sys/procfs.h> on FreeBSD.  The per-thread name is stored as
 498          a null-terminated string as the first member of the
 499          structure.  Rather than define the full structure here, just
 500          extract the null-terminated name from the start of the
 501          note.  */
 502       thread_section_name section_name (".thrmisc", thr->ptid);
 503
 504       section = bfd_get_section_by_name (core_bfd, section_name.c_str ());
 505       if (section != NULL && bfd_section_size (section) > 0)
 506         {
 507           /* Truncate the name if it is longer than "buf".  */
 508           size = bfd_section_size (section);
 509           if (size > sizeof buf - 1)
 510             size = sizeof buf - 1;
 511           if (bfd_get_section_contents (core_bfd, section, buf, (file_ptr) 0,
 512                                         size)
 513               && buf[0] != '\0')
 514             {
 515               buf[size] = '\0';
 516
 517               /* Note that each thread will report the process command
 518                  as its thread name instead of an empty name if a name
 519                  has not been set explicitly.  Return a NULL name in
 520                  that case.  */
 521               if (strcmp (buf, elf_tdata (core_bfd)->core->program) != 0)
 522                 return buf;
 523             }
 524         }
 525     }
 526
 527   return NULL;
 528 }
 529
 530 /* Implement the "core_xfer_siginfo" gdbarch method.  */
 531
 532 static LONGEST
 533 fbsd_core_xfer_siginfo (struct gdbarch *gdbarch, gdb_byte *readbuf,
 534                         ULONGEST offset, ULONGEST len)
 535 {
 536   size_t siginfo_size;
 537
 538   if (gdbarch_long_bit (gdbarch) == 32)
 539     siginfo_size = SIZE32_SIGINFO_T;
 540   else
 541     siginfo_size = SIZE64_SIGINFO_T;
 542   if (offset > siginfo_size)
 543     return -1;
 544
 545   thread_section_name section_name (".note.freebsdcore.lwpinfo", inferior_ptid);
 546   asection *section = bfd_get_section_by_name (core_bfd, section_name.c_str ());
 547   if (section == NULL)
 548     return -1;
 549
 550   gdb_byte buf[4];
 551   if (!bfd_get_section_contents (core_bfd, section, buf,
 552                                  LWPINFO_OFFSET + LWPINFO_PL_FLAGS, 4))
 553     return -1;
 554
 555   int pl_flags = extract_signed_integer (buf, 4, gdbarch_byte_order (gdbarch));
 556   if (!(pl_flags & PL_FLAG_SI))
 557     return -1;
 558
 559   if (offset + len > siginfo_size)
 560     len = siginfo_size - offset;
 561
 562   ULONGEST siginfo_offset;
 563   if (gdbarch_long_bit (gdbarch) == 32)
 564     siginfo_offset = LWPINFO_OFFSET + LWPINFO32_PL_SIGINFO;
 565   else
 566     siginfo_offset = LWPINFO_OFFSET + LWPINFO64_PL_SIGINFO;
 567
 568   if (!bfd_get_section_contents (core_bfd, section, readbuf,
 569                                  siginfo_offset + offset, len))
 570     return -1;
 571
 572   return len;
 573 }
 574
 575 static int
 576 find_signalled_thread (struct thread_info *info, void *data)
 577 {
 578   if (info->suspend.stop_signal != GDB_SIGNAL_0
 579       && info->ptid.pid () == inferior_ptid.pid ())
 580     return 1;
 581
 582   return 0;
 583 }
 584
 585 /* Structure for passing information from
 586    fbsd_collect_thread_registers via an iterator to
 587    fbsd_collect_regset_section_cb. */
 588
 589 struct fbsd_collect_regset_section_cb_data
 590 {
 591   const struct regcache *regcache;
 592   bfd *obfd;
 593   char *note_data;
 594   int *note_size;
 595   unsigned long lwp;
 596   enum gdb_signal stop_signal;
 597   int abort_iteration;
 598 };
 599
 600 static void
 601 fbsd_collect_regset_section_cb (const char *sect_name, int supply_size,
 602                                 int collect_size, const struct regset *regset,
 603                                 const char *human_name, void *cb_data)
 604 {
 605   char *buf;
 606   struct fbsd_collect_regset_section_cb_data *data
 607     = (struct fbsd_collect_regset_section_cb_data *) cb_data;
 608
 609   if (data->abort_iteration)
 610     return;
 611
 612   gdb_assert (regset->collect_regset);
 613
 614   buf = (char *) xmalloc (collect_size);
 615   regset->collect_regset (regset, data->regcache, -1, buf, collect_size);
 616
 617   /* PRSTATUS still needs to be treated specially.  */
 618   if (strcmp (sect_name, ".reg") == 0)
 619     data->note_data = (char *) elfcore_write_prstatus
 620       (data->obfd, data->note_data, data->note_size, data->lwp,
 621        gdb_signal_to_host (data->stop_signal), buf);
 622   else
 623     data->note_data = (char *) elfcore_write_register_note
 624       (data->obfd, data->note_data, data->note_size,
 625        sect_name, buf, collect_size);
 626   xfree (buf);
 627
 628   if (data->note_data == NULL)
 629     data->abort_iteration = 1;
 630 }
 631
 632 /* Records the thread's register state for the corefile note
 633    section.  */
 634
 635 static char *
 636 fbsd_collect_thread_registers (const struct regcache *regcache,
 637                                ptid_t ptid, bfd *obfd,
 638                                char *note_data, int *note_size,
 639                                enum gdb_signal stop_signal)
 640 {
 641   struct gdbarch *gdbarch = regcache->arch ();
 642   struct fbsd_collect_regset_section_cb_data data;
 643
 644   data.regcache = regcache;
 645   data.obfd = obfd;
 646   data.note_data = note_data;
 647   data.note_size = note_size;
 648   data.stop_signal = stop_signal;
 649   data.abort_iteration = 0;
 650   data.lwp = ptid.lwp ();
 651
 652   gdbarch_iterate_over_regset_sections (gdbarch,
 653                                         fbsd_collect_regset_section_cb,
 654                                         &data, regcache);
 655   return data.note_data;
 656 }
 657
 658 struct fbsd_corefile_thread_data
 659 {
 660   struct gdbarch *gdbarch;
 661   bfd *obfd;
 662   char *note_data;
 663   int *note_size;
 664   enum gdb_signal stop_signal;
 665 };
 666
 667 /* Records the thread's register state for the corefile note
 668    section.  */
 669
 670 static void
 671 fbsd_corefile_thread (struct thread_info *info,
 672                       struct fbsd_corefile_thread_data *args)
 673 {
 674   struct regcache *regcache;
 675
 676   regcache = get_thread_arch_regcache (info->ptid, args->gdbarch);
 677
 678   target_fetch_registers (regcache, -1);
 679
 680   args->note_data = fbsd_collect_thread_registers
 681     (regcache, info->ptid, args->obfd, args->note_data,
 682      args->note_size, args->stop_signal);
 683 }
 684
 685 /* Return a byte_vector containing the contents of a core dump note
 686    for the target object of type OBJECT.  If STRUCTSIZE is non-zero,
 687    the data is prefixed with a 32-bit integer size to match the format
 688    used in FreeBSD NT_PROCSTAT_* notes.  */
 689
 690 static gdb::optional<gdb::byte_vector>
 691 fbsd_make_note_desc (enum target_object object, uint32_t structsize)
 692 {
 693   gdb::optional<gdb::byte_vector> buf =
 694     target_read_alloc (current_top_target (), object, NULL);
 695   if (!buf || buf->empty ())
 696     return {};
 697
 698   if (structsize == 0)
 699     return buf;
 700
 701   gdb::byte_vector desc (sizeof (structsize) + buf->size ());
 702   memcpy (desc.data (), &structsize, sizeof (structsize));
 703   memcpy (desc.data () + sizeof (structsize), buf->data (), buf->size ());
 704   return desc;
 705 }
 706
 707 /* Create appropriate note sections for a corefile, returning them in
 708    allocated memory.  */
 709
 710 static char *
 711 fbsd_make_corefile_notes (struct gdbarch *gdbarch, bfd *obfd, int *note_size)
 712 {
 713   struct fbsd_corefile_thread_data thread_args;
 714   char *note_data = NULL;
 715   Elf_Internal_Ehdr *i_ehdrp;
 716   struct thread_info *curr_thr, *signalled_thr;
 717
 718   /* Put a "FreeBSD" label in the ELF header.  */
 719   i_ehdrp = elf_elfheader (obfd);
 720   i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_FREEBSD;
 721
 722   gdb_assert (gdbarch_iterate_over_regset_sections_p (gdbarch));
 723
 724   if (get_exec_file (0))
 725     {
 726       const char *fname = lbasename (get_exec_file (0));
 727       char *psargs = xstrdup (fname);
 728
 729       if (get_inferior_args ())
 730         psargs = reconcat (psargs, psargs, " ", get_inferior_args (),
 731                            (char *) NULL);
 732
 733       note_data = elfcore_write_prpsinfo (obfd, note_data, note_size,
 734                                           fname, psargs);
 735     }
 736
 737   /* Thread register information.  */
 738   try
 739     {
 740       update_thread_list ();
 741     }
 742   catch (const gdb_exception_error &e)
 743     {
 744       exception_print (gdb_stderr, e);
 745     }
 746
 747   /* Like the kernel, prefer dumping the signalled thread first.
 748      "First thread" is what tools use to infer the signalled thread.
 749      In case there's more than one signalled thread, prefer the
 750      current thread, if it is signalled.  */
 751   curr_thr = inferior_thread ();
 752   if (curr_thr->suspend.stop_signal != GDB_SIGNAL_0)
 753     signalled_thr = curr_thr;
 754   else
 755     {
 756       signalled_thr = iterate_over_threads (find_signalled_thread, NULL);
 757       if (signalled_thr == NULL)
 758         signalled_thr = curr_thr;
 759     }
 760
 761   thread_args.gdbarch = gdbarch;
 762   thread_args.obfd = obfd;
 763   thread_args.note_data = note_data;
 764   thread_args.note_size = note_size;
 765   thread_args.stop_signal = signalled_thr->suspend.stop_signal;
 766
 767   fbsd_corefile_thread (signalled_thr, &thread_args);
 768   for (thread_info *thr : current_inferior ()->non_exited_threads ())
 769     {
 770       if (thr == signalled_thr)
 771         continue;
 772
 773       fbsd_corefile_thread (thr, &thread_args);
 774     }
 775
 776   note_data = thread_args.note_data;
 777
 778   /* Auxiliary vector.  */
 779   uint32_t structsize = gdbarch_ptr_bit (gdbarch) / 4; /* Elf_Auxinfo  */
 780   gdb::optional<gdb::byte_vector> note_desc =
 781     fbsd_make_note_desc (TARGET_OBJECT_AUXV, structsize);
 782   if (note_desc && !note_desc->empty ())
 783     {
 784       note_data = elfcore_write_note (obfd, note_data, note_size, "FreeBSD",
 785                                       NT_FREEBSD_PROCSTAT_AUXV,
 786                                       note_desc->data (), note_desc->size ());
 787       if (!note_data)
 788         return NULL;
 789     }
 790
 791   /* Virtual memory mappings.  */
 792   note_desc = fbsd_make_note_desc (TARGET_OBJECT_FREEBSD_VMMAP, 0);
 793   if (note_desc && !note_desc->empty ())
 794     {
 795       note_data = elfcore_write_note (obfd, note_data, note_size, "FreeBSD",
 796                                       NT_FREEBSD_PROCSTAT_VMMAP,
 797                                       note_desc->data (), note_desc->size ());
 798       if (!note_data)
 799         return NULL;
 800     }
 801
 802   note_desc = fbsd_make_note_desc (TARGET_OBJECT_FREEBSD_PS_STRINGS, 0);
 803   if (note_desc && !note_desc->empty ())
 804     {
 805       note_data = elfcore_write_note (obfd, note_data, note_size, "FreeBSD",
 806                                       NT_FREEBSD_PROCSTAT_PSSTRINGS,
 807                                       note_desc->data (), note_desc->size ());
 808       if (!note_data)
 809         return NULL;
 810     }
 811
 812   return note_data;
 813 }
 814
 815 /* Helper function to generate the file descriptor description for a
 816    single open file in 'info proc files'.  */
 817
 818 static const char *
 819 fbsd_file_fd (int kf_fd)
 820 {
 821   switch (kf_fd)
 822     {
 823     case KINFO_FILE_FD_TYPE_CWD:
 824       return "cwd";
 825     case KINFO_FILE_FD_TYPE_ROOT:
 826       return "root";
 827     case KINFO_FILE_FD_TYPE_JAIL:
 828       return "jail";
 829     case KINFO_FILE_FD_TYPE_TRACE:
 830       return "trace";
 831     case KINFO_FILE_FD_TYPE_TEXT:
 832       return "text";
 833     case KINFO_FILE_FD_TYPE_CTTY:
 834       return "ctty";
 835     default:
 836       return int_string (kf_fd, 10, 1, 0, 0);
 837     }
 838 }
 839
 840 /* Helper function to generate the file type for a single open file in
 841    'info proc files'.  */
 842
 843 static const char *
 844 fbsd_file_type (int kf_type, int kf_vnode_type)
 845 {
 846   switch (kf_type)
 847     {
 848     case KINFO_FILE_TYPE_VNODE:
 849       switch (kf_vnode_type)
 850         {
 851         case KINFO_FILE_VTYPE_VREG:
 852           return "file";
 853         case KINFO_FILE_VTYPE_VDIR:
 854           return "dir";
 855         case KINFO_FILE_VTYPE_VCHR:
 856           return "chr";
 857         case KINFO_FILE_VTYPE_VLNK:
 858           return "link";
 859         case KINFO_FILE_VTYPE_VSOCK:
 860           return "socket";
 861         case KINFO_FILE_VTYPE_VFIFO:
 862           return "fifo";
 863         default:
 864           {
 865             char *str = get_print_cell ();
 866
 867             xsnprintf (str, PRINT_CELL_SIZE, "vn:%d", kf_vnode_type);
 868             return str;
 869           }
 870         }
 871     case KINFO_FILE_TYPE_SOCKET:
 872       return "socket";
 873     case KINFO_FILE_TYPE_PIPE:
 874       return "pipe";
 875     case KINFO_FILE_TYPE_FIFO:
 876       return "fifo";
 877     case KINFO_FILE_TYPE_KQUEUE:
 878       return "kqueue";
 879     case KINFO_FILE_TYPE_CRYPTO:
 880       return "crypto";
 881     case KINFO_FILE_TYPE_MQUEUE:
 882       return "mqueue";
 883     case KINFO_FILE_TYPE_SHM:
 884       return "shm";
 885     case KINFO_FILE_TYPE_SEM:
 886       return "sem";
 887     case KINFO_FILE_TYPE_PTS:
 888       return "pts";
 889     case KINFO_FILE_TYPE_PROCDESC:
 890       return "proc";
 891     default:
 892       return int_string (kf_type, 10, 1, 0, 0);
 893     }
 894 }
 895
 896 /* Helper function to generate the file flags for a single open file in
 897    'info proc files'.  */
 898
 899 static const char *
 900 fbsd_file_flags (int kf_flags)
 901 {
 902   static char file_flags[10];
 903
 904   file_flags[0] = (kf_flags & KINFO_FILE_FLAG_READ) ? 'r' : '-';
 905   file_flags[1] = (kf_flags & KINFO_FILE_FLAG_WRITE) ? 'w' : '-';
 906   file_flags[2] = (kf_flags & KINFO_FILE_FLAG_EXEC) ? 'x' : '-';
 907   file_flags[3] = (kf_flags & KINFO_FILE_FLAG_APPEND) ? 'a' : '-';
 908   file_flags[4] = (kf_flags & KINFO_FILE_FLAG_ASYNC) ? 's' : '-';
 909   file_flags[5] = (kf_flags & KINFO_FILE_FLAG_FSYNC) ? 'f' : '-';
 910   file_flags[6] = (kf_flags & KINFO_FILE_FLAG_NONBLOCK) ? 'n' : '-';
 911   file_flags[7] = (kf_flags & KINFO_FILE_FLAG_DIRECT) ? 'd' : '-';
 912   file_flags[8] = (kf_flags & KINFO_FILE_FLAG_HASLOCK) ? 'l' : '-';
 913   file_flags[9] = '\0';
 914
 915   return file_flags;
 916 }
 917
 918 /* Helper function to generate the name of an IP protocol.  */
 919
 920 static const char *
 921 fbsd_ipproto (int protocol)
 922 {
 923   switch (protocol)
 924     {
 925     case FBSD_IPPROTO_ICMP:
 926       return "icmp";
 927     case FBSD_IPPROTO_TCP:
 928       return "tcp";
 929     case FBSD_IPPROTO_UDP:
 930       return "udp";
 931     case FBSD_IPPROTO_SCTP:
 932       return "sctp";
 933     default:
 934       {
 935         char *str = get_print_cell ();
 936
 937         xsnprintf (str, PRINT_CELL_SIZE, "ip<%d>", protocol);
 938         return str;
 939       }
 940     }
 941 }
 942
 943 /* Helper function to print out an IPv4 socket address.  */
 944
 945 static void
 946 fbsd_print_sockaddr_in (const void *sockaddr)
 947 {
 948   const struct fbsd_sockaddr_in *sin =
 949     reinterpret_cast<const struct fbsd_sockaddr_in *> (sockaddr);
 950   char buf[INET_ADDRSTRLEN];
 951
 952   if (inet_ntop (AF_INET, sin->sin_addr, buf, sizeof buf) == nullptr)
 953     error (_("Failed to format IPv4 address"));
 954   printf_filtered ("%s:%u", buf,
 955                    (sin->sin_port[0] << 8) | sin->sin_port[1]);
 956 }
 957
 958 /* Helper function to print out an IPv6 socket address.  */
 959
 960 static void
 961 fbsd_print_sockaddr_in6 (const void *sockaddr)
 962 {
 963   const struct fbsd_sockaddr_in6 *sin6 =
 964     reinterpret_cast<const struct fbsd_sockaddr_in6 *> (sockaddr);
 965   char buf[INET6_ADDRSTRLEN];
 966
 967   if (inet_ntop (AF_INET6, sin6->sin6_addr, buf, sizeof buf) == nullptr)
 968     error (_("Failed to format IPv6 address"));
 969   printf_filtered ("%s.%u", buf,
 970                    (sin6->sin6_port[0] << 8) | sin6->sin6_port[1]);
 971 }
 972
 973 /* See fbsd-tdep.h.  */
 974
 975 void
 976 fbsd_info_proc_files_header ()
 977 {
 978   printf_filtered (_("Open files:\n\n"));
 979   printf_filtered ("  %6s %6s %10s %9s %s\n",
 980                    "FD", "Type", "Offset", "Flags  ", "Name");
 981 }
 982
 983 /* See fbsd-tdep.h.  */
 984
 985 void
 986 fbsd_info_proc_files_entry (int kf_type, int kf_fd, int kf_flags,
 987                             LONGEST kf_offset, int kf_vnode_type,
 988                             int kf_sock_domain, int kf_sock_type,
 989                             int kf_sock_protocol, const void *kf_sa_local,
 990                             const void *kf_sa_peer, const void *kf_path)
 991 {
 992   printf_filtered ("  %6s %6s %10s %8s ",
 993                    fbsd_file_fd (kf_fd),
 994                    fbsd_file_type (kf_type, kf_vnode_type),
 995                    kf_offset > -1 ? hex_string (kf_offset) : "-",
 996                    fbsd_file_flags (kf_flags));
 997   if (kf_type == KINFO_FILE_TYPE_SOCKET)
 998     {
 999       switch (kf_sock_domain)
1000         {
1001         case FBSD_AF_UNIX:
1002           {
1003             switch (kf_sock_type)
1004               {
1005               case FBSD_SOCK_STREAM:
1006                 printf_filtered ("unix stream:");
1007                 break;
1008               case FBSD_SOCK_DGRAM:
1009                 printf_filtered ("unix dgram:");
1010                 break;
1011               case FBSD_SOCK_SEQPACKET:
1012                 printf_filtered ("unix seqpacket:");
1013                 break;
1014               default:
1015                 printf_filtered ("unix <%d>:", kf_sock_type);
1016                 break;
1017               }
1018
1019             /* For local sockets, print out the first non-nul path
1020                rather than both paths.  */
1021             const struct fbsd_sockaddr_un *saddr_un
1022               = reinterpret_cast<const struct fbsd_sockaddr_un *> (kf_sa_local);
1023             if (saddr_un->sun_path[0] == 0)
1024               saddr_un = reinterpret_cast<const struct fbsd_sockaddr_un *>
1025                 (kf_sa_peer);
1026             printf_filtered ("%s", saddr_un->sun_path);
1027             break;
1028           }
1029         case FBSD_AF_INET:
1030           printf_filtered ("%s4 ", fbsd_ipproto (kf_sock_protocol));
1031           fbsd_print_sockaddr_in (kf_sa_local);
1032           printf_filtered (" -> ");
1033           fbsd_print_sockaddr_in (kf_sa_peer);
1034           break;
1035         case FBSD_AF_INET6:
1036           printf_filtered ("%s6 ", fbsd_ipproto (kf_sock_protocol));
1037           fbsd_print_sockaddr_in6 (kf_sa_local);
1038           printf_filtered (" -> ");
1039           fbsd_print_sockaddr_in6 (kf_sa_peer);
1040           break;
1041         }
1042     }
1043   else
1044     printf_filtered ("%s", reinterpret_cast<const char *> (kf_path));
1045   printf_filtered ("\n");
1046 }
1047
1048 /* Implement "info proc files" for a corefile.  */
1049
1050 static void
1051 fbsd_core_info_proc_files (struct gdbarch *gdbarch)
1052 {
1053   asection *section
1054     = bfd_get_section_by_name (core_bfd, ".note.freebsdcore.files");
1055   if (section == NULL)
1056     {
1057       warning (_("unable to find open files in core file"));
1058       return;
1059     }
1060
1061   size_t note_size = bfd_section_size (section);
1062   if (note_size < 4)
1063     error (_("malformed core note - too short for header"));
1064
1065   gdb::def_vector<unsigned char> contents (note_size);
1066   if (!bfd_get_section_contents (core_bfd, section, contents.data (),
1067                                  0, note_size))
1068     error (_("could not get core note contents"));
1069
1070   unsigned char *descdata = contents.data ();
1071   unsigned char *descend = descdata + note_size;
1072
1073   /* Skip over the structure size.  */
1074   descdata += 4;
1075
1076   fbsd_info_proc_files_header ();
1077
1078   while (descdata + KF_PATH < descend)
1079     {
1080       ULONGEST structsize = bfd_get_32 (core_bfd, descdata + KF_STRUCTSIZE);
1081       if (structsize < KF_PATH)
1082         error (_("malformed core note - file structure too small"));
1083
1084       LONGEST type = bfd_get_signed_32 (core_bfd, descdata + KF_TYPE);
1085       LONGEST fd = bfd_get_signed_32 (core_bfd, descdata + KF_FD);
1086       LONGEST flags = bfd_get_signed_32 (core_bfd, descdata + KF_FLAGS);
1087       LONGEST offset = bfd_get_signed_64 (core_bfd, descdata + KF_OFFSET);
1088       LONGEST vnode_type = bfd_get_signed_32 (core_bfd,
1089                                               descdata + KF_VNODE_TYPE);
1090       LONGEST sock_domain = bfd_get_signed_32 (core_bfd,
1091                                                descdata + KF_SOCK_DOMAIN);
1092       LONGEST sock_type = bfd_get_signed_32 (core_bfd, descdata + KF_SOCK_TYPE);
1093       LONGEST sock_protocol = bfd_get_signed_32 (core_bfd,
1094                                                  descdata + KF_SOCK_PROTOCOL);
1095       fbsd_info_proc_files_entry (type, fd, flags, offset, vnode_type,
1096                                   sock_domain, sock_type, sock_protocol,
1097                                   descdata + KF_SA_LOCAL, descdata + KF_SA_PEER,
1098                                   descdata + KF_PATH);
1099
1100       descdata += structsize;
1101     }
1102 }
1103
1104 /* Helper function to generate mappings flags for a single VM map
1105    entry in 'info proc mappings'.  */
1106
1107 static const char *
1108 fbsd_vm_map_entry_flags (int kve_flags, int kve_protection)
1109 {
1110   static char vm_flags[9];
1111
1112   vm_flags[0] = (kve_protection & KINFO_VME_PROT_READ) ? 'r' : '-';
1113   vm_flags[1] = (kve_protection & KINFO_VME_PROT_WRITE) ? 'w' : '-';
1114   vm_flags[2] = (kve_protection & KINFO_VME_PROT_EXEC) ? 'x' : '-';
1115   vm_flags[3] = ' ';
1116   vm_flags[4] = (kve_flags & KINFO_VME_FLAG_COW) ? 'C' : '-';
1117   vm_flags[5] = (kve_flags & KINFO_VME_FLAG_NEEDS_COPY) ? 'N' : '-';
1118   vm_flags[6] = (kve_flags & KINFO_VME_FLAG_SUPER) ? 'S' : '-';
1119   vm_flags[7] = (kve_flags & KINFO_VME_FLAG_GROWS_UP) ? 'U'
1120     : (kve_flags & KINFO_VME_FLAG_GROWS_DOWN) ? 'D' : '-';
1121   vm_flags[8] = '\0';
1122
1123   return vm_flags;
1124 }
1125
1126 /* See fbsd-tdep.h.  */
1127
1128 void
1129 fbsd_info_proc_mappings_header (int addr_bit)
1130 {
1131   printf_filtered (_("Mapped address spaces:\n\n"));
1132   if (addr_bit == 64)
1133     {
1134       printf_filtered ("  %18s %18s %10s %10s %9s %s\n",
1135                        "Start Addr",
1136                        "  End Addr",
1137                        "      Size", "    Offset", "Flags  ", "File");
1138     }
1139   else
1140     {
1141       printf_filtered ("\t%10s %10s %10s %10s %9s %s\n",
1142                        "Start Addr",
1143                        "  End Addr",
1144                        "      Size", "    Offset", "Flags  ", "File");
1145     }
1146 }
1147
1148 /* See fbsd-tdep.h.  */
1149
1150 void
1151 fbsd_info_proc_mappings_entry (int addr_bit, ULONGEST kve_start,
1152                                ULONGEST kve_end, ULONGEST kve_offset,
1153                                int kve_flags, int kve_protection,
1154                                const void *kve_path)
1155 {
1156   if (addr_bit == 64)
1157     {
1158       printf_filtered ("  %18s %18s %10s %10s %9s %s\n",
1159                        hex_string (kve_start),
1160                        hex_string (kve_end),
1161                        hex_string (kve_end - kve_start),
1162                        hex_string (kve_offset),
1163                        fbsd_vm_map_entry_flags (kve_flags, kve_protection),
1164                        reinterpret_cast<const char *> (kve_path));
1165     }
1166   else
1167     {
1168       printf_filtered ("\t%10s %10s %10s %10s %9s %s\n",
1169                        hex_string (kve_start),
1170                        hex_string (kve_end),
1171                        hex_string (kve_end - kve_start),
1172                        hex_string (kve_offset),
1173                        fbsd_vm_map_entry_flags (kve_flags, kve_protection),
1174                        reinterpret_cast<const char *> (kve_path));
1175     }
1176 }
1177
1178 /* Implement "info proc mappings" for a corefile.  */
1179
1180 static void
1181 fbsd_core_info_proc_mappings (struct gdbarch *gdbarch)
1182 {
1183   asection *section;
1184   unsigned char *descdata, *descend;
1185   size_t note_size;
1186
1187   section = bfd_get_section_by_name (core_bfd, ".note.freebsdcore.vmmap");
1188   if (section == NULL)
1189     {
1190       warning (_("unable to find mappings in core file"));
1191       return;
1192     }
1193
1194   note_size = bfd_section_size (section);
1195   if (note_size < 4)
1196     error (_("malformed core note - too short for header"));
1197
1198   gdb::def_vector<unsigned char> contents (note_size);
1199   if (!bfd_get_section_contents (core_bfd, section, contents.data (),
1200                                  0, note_size))
1201     error (_("could not get core note contents"));
1202
1203   descdata = contents.data ();
1204   descend = descdata + note_size;
1205
1206   /* Skip over the structure size.  */
1207   descdata += 4;
1208
1209   fbsd_info_proc_mappings_header (gdbarch_addr_bit (gdbarch));
1210   while (descdata + KVE_PATH < descend)
1211     {
1212       ULONGEST structsize = bfd_get_32 (core_bfd, descdata + KVE_STRUCTSIZE);
1213       if (structsize < KVE_PATH)
1214         error (_("malformed core note - vmmap entry too small"));
1215
1216       ULONGEST start = bfd_get_64 (core_bfd, descdata + KVE_START);
1217       ULONGEST end = bfd_get_64 (core_bfd, descdata + KVE_END);
1218       ULONGEST offset = bfd_get_64 (core_bfd, descdata + KVE_OFFSET);
1219       LONGEST flags = bfd_get_signed_32 (core_bfd, descdata + KVE_FLAGS);
1220       LONGEST prot = bfd_get_signed_32 (core_bfd, descdata + KVE_PROTECTION);
1221       fbsd_info_proc_mappings_entry (gdbarch_addr_bit (gdbarch), start, end,
1222                                      offset, flags, prot, descdata + KVE_PATH);
1223
1224       descdata += structsize;
1225     }
1226 }
1227
1228 /* Fetch the pathname of a vnode for a single file descriptor from the
1229    file table core note.  */
1230
1231 static gdb::unique_xmalloc_ptr<char>
1232 fbsd_core_vnode_path (struct gdbarch *gdbarch, int fd)
1233 {
1234   asection *section;
1235   unsigned char *descdata, *descend;
1236   size_t note_size;
1237
1238   section = bfd_get_section_by_name (core_bfd, ".note.freebsdcore.files");
1239   if (section == NULL)
1240     return nullptr;
1241
1242   note_size = bfd_section_size (section);
1243   if (note_size < 4)
1244     error (_("malformed core note - too short for header"));
1245
1246   gdb::def_vector<unsigned char> contents (note_size);
1247   if (!bfd_get_section_contents (core_bfd, section, contents.data (),
1248                                  0, note_size))
1249     error (_("could not get core note contents"));
1250
1251   descdata = contents.data ();
1252   descend = descdata + note_size;
1253
1254   /* Skip over the structure size.  */
1255   descdata += 4;
1256
1257   while (descdata + KF_PATH < descend)
1258     {
1259       ULONGEST structsize;
1260
1261       structsize = bfd_get_32 (core_bfd, descdata + KF_STRUCTSIZE);
1262       if (structsize < KF_PATH)
1263         error (_("malformed core note - file structure too small"));
1264
1265       if (bfd_get_32 (core_bfd, descdata + KF_TYPE) == KINFO_FILE_TYPE_VNODE
1266           && bfd_get_signed_32 (core_bfd, descdata + KF_FD) == fd)
1267         {
1268           char *path = (char *) descdata + KF_PATH;
1269           return make_unique_xstrdup (path);
1270         }
1271
1272       descdata += structsize;
1273     }
1274   return nullptr;
1275 }
1276
1277 /* Helper function to read a struct timeval.  */
1278
1279 static void
1280 fbsd_core_fetch_timeval (struct gdbarch *gdbarch, unsigned char *data,
1281                          LONGEST &sec, ULONGEST &usec)
1282 {
1283   if (gdbarch_addr_bit (gdbarch) == 64)
1284     {
1285       sec = bfd_get_signed_64 (core_bfd, data);
1286       usec = bfd_get_64 (core_bfd, data + 8);
1287     }
1288   else if (bfd_get_arch (core_bfd) == bfd_arch_i386)
1289     {
1290       sec = bfd_get_signed_32 (core_bfd, data);
1291       usec = bfd_get_32 (core_bfd, data + 4);
1292     }
1293   else
1294     {
1295       sec = bfd_get_signed_64 (core_bfd, data);
1296       usec = bfd_get_32 (core_bfd, data + 8);
1297     }
1298 }
1299
1300 /* Print out the contents of a signal set.  */
1301
1302 static void
1303 fbsd_print_sigset (const char *descr, unsigned char *sigset)
1304 {
1305   printf_filtered ("%s: ", descr);
1306   for (int i = 0; i < SIG_WORDS; i++)
1307     printf_filtered ("%08x ",
1308                      (unsigned int) bfd_get_32 (core_bfd, sigset + i * 4));
1309   printf_filtered ("\n");
1310 }
1311
1312 /* Implement "info proc status" for a corefile.  */
1313
1314 static void
1315 fbsd_core_info_proc_status (struct gdbarch *gdbarch)
1316 {
1317   const struct kinfo_proc_layout *kp;
1318   asection *section;
1319   unsigned char *descdata;
1320   int addr_bit, long_bit;
1321   size_t note_size;
1322   ULONGEST value;
1323   LONGEST sec;
1324
1325   section = bfd_get_section_by_name (core_bfd, ".note.freebsdcore.proc");
1326   if (section == NULL)
1327     {
1328       warning (_("unable to find process info in core file"));
1329       return;
1330     }
1331
1332   addr_bit = gdbarch_addr_bit (gdbarch);
1333   if (addr_bit == 64)
1334     kp = &kinfo_proc_layout_64;
1335   else if (bfd_get_arch (core_bfd) == bfd_arch_i386)
1336     kp = &kinfo_proc_layout_i386;
1337   else
1338     kp = &kinfo_proc_layout_32;
1339   long_bit = gdbarch_long_bit (gdbarch);
1340
1341   /*
1342    * Ensure that the note is large enough for all of the fields fetched
1343    * by this function.  In particular, the note must contain the 32-bit
1344    * structure size, then it must be long enough to access the last
1345    * field used (ki_rusage_ch.ru_majflt) which is the size of a long.
1346    */
1347   note_size = bfd_section_size (section);
1348   if (note_size < (4 + kp->ki_rusage_ch + kp->ru_majflt
1349                    + long_bit / TARGET_CHAR_BIT))
1350     error (_("malformed core note - too short"));
1351
1352   gdb::def_vector<unsigned char> contents (note_size);
1353   if (!bfd_get_section_contents (core_bfd, section, contents.data (),
1354                                  0, note_size))
1355     error (_("could not get core note contents"));
1356
1357   descdata = contents.data ();
1358
1359   /* Skip over the structure size.  */
1360   descdata += 4;
1361
1362   /* Verify 'ki_layout' is 0.  */
1363   if (bfd_get_32 (core_bfd, descdata + kp->ki_layout) != 0)
1364     {
1365       warning (_("unsupported process information in core file"));
1366       return;
1367     }
1368
1369   printf_filtered ("Name: %.19s\n", descdata + kp->ki_comm);
1370   printf_filtered ("Process ID: %s\n",
1371                    pulongest (bfd_get_32 (core_bfd, descdata + kp->ki_pid)));
1372   printf_filtered ("Parent process: %s\n",
1373                    pulongest (bfd_get_32 (core_bfd, descdata + kp->ki_ppid)));
1374   printf_filtered ("Process group: %s\n",
1375                    pulongest (bfd_get_32 (core_bfd, descdata + kp->ki_pgid)));
1376   printf_filtered ("Session id: %s\n",
1377                    pulongest (bfd_get_32 (core_bfd, descdata + kp->ki_sid)));
1378
1379   /* FreeBSD 12.0 and later store a 64-bit dev_t at 'ki_tdev'.  Older
1380      kernels store a 32-bit dev_t at 'ki_tdev_freebsd11'.  In older
1381      kernels the 64-bit 'ki_tdev' field is in a reserved section of
1382      the structure that is cleared to zero.  Assume that a zero value
1383      in ki_tdev indicates a core dump from an older kernel and use the
1384      value in 'ki_tdev_freebsd11' instead.  */
1385   value = bfd_get_64 (core_bfd, descdata + kp->ki_tdev);
1386   if (value == 0)
1387     value = bfd_get_32 (core_bfd, descdata + kp->ki_tdev_freebsd11);
1388   printf_filtered ("TTY: %s\n", pulongest (value));
1389   printf_filtered ("TTY owner process group: %s\n",
1390                    pulongest (bfd_get_32 (core_bfd, descdata + kp->ki_tpgid)));
1391   printf_filtered ("User IDs (real, effective, saved): %s %s %s\n",
1392                    pulongest (bfd_get_32 (core_bfd, descdata + kp->ki_ruid)),
1393                    pulongest (bfd_get_32 (core_bfd, descdata + kp->ki_uid)),
1394                    pulongest (bfd_get_32 (core_bfd, descdata + kp->ki_svuid)));
1395   printf_filtered ("Group IDs (real, effective, saved): %s %s %s\n",
1396                    pulongest (bfd_get_32 (core_bfd, descdata + kp->ki_rgid)),
1397                    pulongest (bfd_get_32 (core_bfd, descdata + kp->ki_groups)),
1398                    pulongest (bfd_get_32 (core_bfd, descdata + kp->ki_svgid)));
1399   printf_filtered ("Groups: ");
1400   uint16_t ngroups = bfd_get_16 (core_bfd, descdata + kp->ki_ngroups);
1401   for (int i = 0; i < ngroups; i++)
1402     printf_filtered ("%s ",
1403                      pulongest (bfd_get_32 (core_bfd,
1404                                             descdata + kp->ki_groups + i * 4)));
1405   printf_filtered ("\n");
1406   value = bfd_get (long_bit, core_bfd,
1407                    descdata + kp->ki_rusage + kp->ru_minflt);
1408   printf_filtered ("Minor faults (no memory page): %s\n", pulongest (value));
1409   value = bfd_get (long_bit, core_bfd,
1410                    descdata + kp->ki_rusage_ch + kp->ru_minflt);
1411   printf_filtered ("Minor faults, children: %s\n", pulongest (value));
1412   value = bfd_get (long_bit, core_bfd,
1413                    descdata + kp->ki_rusage + kp->ru_majflt);
1414   printf_filtered ("Major faults (memory page faults): %s\n",
1415                    pulongest (value));
1416   value = bfd_get (long_bit, core_bfd,
1417                    descdata + kp->ki_rusage_ch + kp->ru_majflt);
1418   printf_filtered ("Major faults, children: %s\n", pulongest (value));
1419   fbsd_core_fetch_timeval (gdbarch,
1420                            descdata + kp->ki_rusage + kp->ru_utime,
1421                            sec, value);
1422   printf_filtered ("utime: %s.%06d\n", plongest (sec), (int) value);
1423   fbsd_core_fetch_timeval (gdbarch,
1424                            descdata + kp->ki_rusage + kp->ru_stime,
1425                            sec, value);
1426   printf_filtered ("stime: %s.%06d\n", plongest (sec), (int) value);
1427   fbsd_core_fetch_timeval (gdbarch,
1428                            descdata + kp->ki_rusage_ch + kp->ru_utime,
1429                            sec, value);
1430   printf_filtered ("utime, children: %s.%06d\n", plongest (sec), (int) value);
1431   fbsd_core_fetch_timeval (gdbarch,
1432                            descdata + kp->ki_rusage_ch + kp->ru_stime,
1433                            sec, value);
1434   printf_filtered ("stime, children: %s.%06d\n", plongest (sec), (int) value);
1435   printf_filtered ("'nice' value: %d\n",
1436                    (int) bfd_get_signed_8 (core_bfd, descdata + kp->ki_nice));
1437   fbsd_core_fetch_timeval (gdbarch, descdata + kp->ki_start, sec, value);
1438   printf_filtered ("Start time: %s.%06d\n", plongest (sec), (int) value);
1439   printf_filtered ("Virtual memory size: %s kB\n",
1440                    pulongest (bfd_get (addr_bit, core_bfd,
1441                                        descdata + kp->ki_size) / 1024));
1442   printf_filtered ("Data size: %s pages\n",
1443                    pulongest (bfd_get (addr_bit, core_bfd,
1444                                        descdata + kp->ki_dsize)));
1445   printf_filtered ("Stack size: %s pages\n",
1446                    pulongest (bfd_get (addr_bit, core_bfd,
1447                                        descdata + kp->ki_ssize)));
1448   printf_filtered ("Text size: %s pages\n",
1449                    pulongest (bfd_get (addr_bit, core_bfd,
1450                                        descdata + kp->ki_tsize)));
1451   printf_filtered ("Resident set size: %s pages\n",
1452                    pulongest (bfd_get (addr_bit, core_bfd,
1453                                        descdata + kp->ki_rssize)));
1454   printf_filtered ("Maximum RSS: %s pages\n",
1455                    pulongest (bfd_get (long_bit, core_bfd,
1456                                        descdata + kp->ki_rusage
1457                                        + kp->ru_maxrss)));
1458   fbsd_print_sigset ("Ignored Signals", descdata + kp->ki_sigignore);
1459   fbsd_print_sigset ("Caught Signals", descdata + kp->ki_sigcatch);
1460 }
1461
1462 /* Implement the "core_info_proc" gdbarch method.  */
1463
1464 static void
1465 fbsd_core_info_proc (struct gdbarch *gdbarch, const char *args,
1466                      enum info_proc_what what)
1467 {
1468   bool do_cmdline = false;
1469   bool do_cwd = false;
1470   bool do_exe = false;
1471   bool do_files = false;
1472   bool do_mappings = false;
1473   bool do_status = false;
1474   int pid;
1475
1476   switch (what)
1477     {
1478     case IP_MINIMAL:
1479       do_cmdline = true;
1480       do_cwd = true;
1481       do_exe = true;
1482       break;
1483     case IP_MAPPINGS:
1484       do_mappings = true;
1485       break;
1486     case IP_STATUS:
1487     case IP_STAT:
1488       do_status = true;
1489       break;
1490     case IP_CMDLINE:
1491       do_cmdline = true;
1492       break;
1493     case IP_EXE:
1494       do_exe = true;
1495       break;
1496     case IP_CWD:
1497       do_cwd = true;
1498       break;
1499     case IP_FILES:
1500       do_files = true;
1501       break;
1502     case IP_ALL:
1503       do_cmdline = true;
1504       do_cwd = true;
1505       do_exe = true;
1506       do_files = true;
1507       do_mappings = true;
1508       do_status = true;
1509       break;
1510     default:
1511       return;
1512     }
1513
1514   pid = bfd_core_file_pid (core_bfd);
1515   if (pid != 0)
1516     printf_filtered (_("process %d\n"), pid);
1517
1518   if (do_cmdline)
1519     {
1520       const char *cmdline;
1521
1522       cmdline = bfd_core_file_failing_command (core_bfd);
1523       if (cmdline)
1524         printf_filtered ("cmdline = '%s'\n", cmdline);
1525       else
1526         warning (_("Command line unavailable"));
1527     }
1528   if (do_cwd)
1529     {
1530       gdb::unique_xmalloc_ptr<char> cwd =
1531         fbsd_core_vnode_path (gdbarch, KINFO_FILE_FD_TYPE_CWD);
1532       if (cwd)
1533         printf_filtered ("cwd = '%s'\n", cwd.get ());
1534       else
1535         warning (_("unable to read current working directory"));
1536     }
1537   if (do_exe)
1538     {
1539       gdb::unique_xmalloc_ptr<char> exe =
1540         fbsd_core_vnode_path (gdbarch, KINFO_FILE_FD_TYPE_TEXT);
1541       if (exe)
1542         printf_filtered ("exe = '%s'\n", exe.get ());
1543       else
1544         warning (_("unable to read executable path name"));
1545     }
1546   if (do_files)
1547     fbsd_core_info_proc_files (gdbarch);
1548   if (do_mappings)
1549     fbsd_core_info_proc_mappings (gdbarch);
1550   if (do_status)
1551     fbsd_core_info_proc_status (gdbarch);
1552 }
1553
1554 /* Print descriptions of FreeBSD-specific AUXV entries to FILE.  */
1555
1556 static void
1557 fbsd_print_auxv_entry (struct gdbarch *gdbarch, struct ui_file *file,
1558                        CORE_ADDR type, CORE_ADDR val)
1559 {
1560   const char *name = "???";
1561   const char *description = "";
1562   enum auxv_format format = AUXV_FORMAT_HEX;
1563
1564   switch (type)
1565     {
1566     case AT_NULL:
1567     case AT_IGNORE:
1568     case AT_EXECFD:
1569     case AT_PHDR:
1570     case AT_PHENT:
1571     case AT_PHNUM:
1572     case AT_PAGESZ:
1573     case AT_BASE:
1574     case AT_FLAGS:
1575     case AT_ENTRY:
1576     case AT_NOTELF:
1577     case AT_UID:
1578     case AT_EUID:
1579     case AT_GID:
1580     case AT_EGID:
1581       default_print_auxv_entry (gdbarch, file, type, val);
1582       return;
1583 #define _TAGNAME(tag) #tag
1584 #define TAGNAME(tag) _TAGNAME(AT_##tag)
1585 #define TAG(tag, text, kind) \
1586       case AT_FREEBSD_##tag: name = TAGNAME(tag); description = text; format = kind; break
1587       TAG (EXECPATH, _("Executable path"), AUXV_FORMAT_STR);
1588       TAG (CANARY, _("Canary for SSP"), AUXV_FORMAT_HEX);
1589       TAG (CANARYLEN, ("Length of the SSP canary"), AUXV_FORMAT_DEC);
1590       TAG (OSRELDATE, _("OSRELDATE"), AUXV_FORMAT_DEC);
1591       TAG (NCPUS, _("Number of CPUs"), AUXV_FORMAT_DEC);
1592       TAG (PAGESIZES, _("Pagesizes"), AUXV_FORMAT_HEX);
1593       TAG (PAGESIZESLEN, _("Number of pagesizes"), AUXV_FORMAT_DEC);
1594       TAG (TIMEKEEP, _("Pointer to timehands"), AUXV_FORMAT_HEX);
1595       TAG (STACKPROT, _("Initial stack protection"), AUXV_FORMAT_HEX);
1596       TAG (EHDRFLAGS, _("ELF header e_flags"), AUXV_FORMAT_HEX);
1597       TAG (HWCAP, _("Machine-dependent CPU capability hints"), AUXV_FORMAT_HEX);
1598       TAG (HWCAP2, _("Extension of AT_HWCAP"), AUXV_FORMAT_HEX);
1599     }
1600
1601   fprint_auxv_entry (file, name, description, format, type, val);
1602 }
1603
1604 /* Implement the "get_siginfo_type" gdbarch method.  */
1605
1606 static struct type *
1607 fbsd_get_siginfo_type (struct gdbarch *gdbarch)
1608 {
1609   struct fbsd_gdbarch_data *fbsd_gdbarch_data;
1610   struct type *int_type, *int32_type, *uint32_type, *long_type, *void_ptr_type;
1611   struct type *uid_type, *pid_type;
1612   struct type *sigval_type, *reason_type;
1613   struct type *siginfo_type;
1614   struct type *type;
1615
1616   fbsd_gdbarch_data = get_fbsd_gdbarch_data (gdbarch);
1617   if (fbsd_gdbarch_data->siginfo_type != NULL)
1618     return fbsd_gdbarch_data->siginfo_type;
1619
1620   int_type = arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch),
1621                                 0, "int");
1622   int32_type = arch_integer_type (gdbarch, 32, 0, "int32_t");
1623   uint32_type = arch_integer_type (gdbarch, 32, 1, "uint32_t");
1624   long_type = arch_integer_type (gdbarch, gdbarch_long_bit (gdbarch),
1625                                  0, "long");
1626   void_ptr_type = lookup_pointer_type (builtin_type (gdbarch)->builtin_void);
1627
1628   /* union sigval */
1629   sigval_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_UNION);
1630   TYPE_NAME (sigval_type) = xstrdup ("sigval");
1631   append_composite_type_field (sigval_type, "sival_int", int_type);
1632   append_composite_type_field (sigval_type, "sival_ptr", void_ptr_type);
1633
1634   /* __pid_t */
1635   pid_type = arch_type (gdbarch, TYPE_CODE_TYPEDEF,
1636                         TYPE_LENGTH (int32_type) * TARGET_CHAR_BIT, "__pid_t");
1637   TYPE_TARGET_TYPE (pid_type) = int32_type;
1638   TYPE_TARGET_STUB (pid_type) = 1;
1639
1640   /* __uid_t */
1641   uid_type = arch_type (gdbarch, TYPE_CODE_TYPEDEF,
1642                         TYPE_LENGTH (uint32_type) * TARGET_CHAR_BIT,
1643                         "__uid_t");
1644   TYPE_TARGET_TYPE (uid_type) = uint32_type;
1645   TYPE_TARGET_STUB (uid_type) = 1;
1646
1647   /* _reason */
1648   reason_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_UNION);
1649
1650   /* _fault */
1651   type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
1652   append_composite_type_field (type, "si_trapno", int_type);
1653   append_composite_type_field (reason_type, "_fault", type);
1654
1655   /* _timer */
1656   type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
1657   append_composite_type_field (type, "si_timerid", int_type);
1658   append_composite_type_field (type, "si_overrun", int_type);
1659   append_composite_type_field (reason_type, "_timer", type);
1660
1661   /* _mesgq */
1662   type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
1663   append_composite_type_field (type, "si_mqd", int_type);
1664   append_composite_type_field (reason_type, "_mesgq", type);
1665
1666   /* _poll */
1667   type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
1668   append_composite_type_field (type, "si_band", long_type);
1669   append_composite_type_field (reason_type, "_poll", type);
1670
1671   /* __spare__ */
1672   type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
1673   append_composite_type_field (type, "__spare1__", long_type);
1674   append_composite_type_field (type, "__spare2__",
1675                                init_vector_type (int_type, 7));
1676   append_composite_type_field (reason_type, "__spare__", type);
1677
1678   /* struct siginfo */
1679   siginfo_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
1680   TYPE_NAME (siginfo_type) = xstrdup ("siginfo");
1681   append_composite_type_field (siginfo_type, "si_signo", int_type);
1682   append_composite_type_field (siginfo_type, "si_errno", int_type);
1683   append_composite_type_field (siginfo_type, "si_code", int_type);
1684   append_composite_type_field (siginfo_type, "si_pid", pid_type);
1685   append_composite_type_field (siginfo_type, "si_uid", uid_type);
1686   append_composite_type_field (siginfo_type, "si_status", int_type);
1687   append_composite_type_field (siginfo_type, "si_addr", void_ptr_type);
1688   append_composite_type_field (siginfo_type, "si_value", sigval_type);
1689   append_composite_type_field (siginfo_type, "_reason", reason_type);
1690
1691   fbsd_gdbarch_data->siginfo_type = siginfo_type;
1692
1693   return siginfo_type;
1694 }
1695
1696 /* Implement the "gdb_signal_from_target" gdbarch method.  */
1697
1698 static enum gdb_signal
1699 fbsd_gdb_signal_from_target (struct gdbarch *gdbarch, int signal)
1700 {
1701   switch (signal)
1702     {
1703     case 0:
1704       return GDB_SIGNAL_0;
1705
1706     case FREEBSD_SIGHUP:
1707       return GDB_SIGNAL_HUP;
1708
1709     case FREEBSD_SIGINT:
1710       return GDB_SIGNAL_INT;
1711
1712     case FREEBSD_SIGQUIT:
1713       return GDB_SIGNAL_QUIT;
1714
1715     case FREEBSD_SIGILL:
1716       return GDB_SIGNAL_ILL;
1717
1718     case FREEBSD_SIGTRAP:
1719       return GDB_SIGNAL_TRAP;
1720
1721     case FREEBSD_SIGABRT:
1722       return GDB_SIGNAL_ABRT;
1723
1724     case FREEBSD_SIGEMT:
1725       return GDB_SIGNAL_EMT;
1726
1727     case FREEBSD_SIGFPE:
1728       return GDB_SIGNAL_FPE;
1729
1730     case FREEBSD_SIGKILL:
1731       return GDB_SIGNAL_KILL;
1732
1733     case FREEBSD_SIGBUS:
1734       return GDB_SIGNAL_BUS;
1735
1736     case FREEBSD_SIGSEGV:
1737       return GDB_SIGNAL_SEGV;
1738
1739     case FREEBSD_SIGSYS:
1740       return GDB_SIGNAL_SYS;
1741
1742     case FREEBSD_SIGPIPE:
1743       return GDB_SIGNAL_PIPE;
1744
1745     case FREEBSD_SIGALRM:
1746       return GDB_SIGNAL_ALRM;
1747
1748     case FREEBSD_SIGTERM:
1749       return GDB_SIGNAL_TERM;
1750
1751     case FREEBSD_SIGURG:
1752       return GDB_SIGNAL_URG;
1753
1754     case FREEBSD_SIGSTOP:
1755       return GDB_SIGNAL_STOP;
1756
1757     case FREEBSD_SIGTSTP:
1758       return GDB_SIGNAL_TSTP;
1759
1760     case FREEBSD_SIGCONT:
1761       return GDB_SIGNAL_CONT;
1762
1763     case FREEBSD_SIGCHLD:
1764       return GDB_SIGNAL_CHLD;
1765
1766     case FREEBSD_SIGTTIN:
1767       return GDB_SIGNAL_TTIN;
1768
1769     case FREEBSD_SIGTTOU:
1770       return GDB_SIGNAL_TTOU;
1771
1772     case FREEBSD_SIGIO:
1773       return GDB_SIGNAL_IO;
1774
1775     case FREEBSD_SIGXCPU:
1776       return GDB_SIGNAL_XCPU;
1777
1778     case FREEBSD_SIGXFSZ:
1779       return GDB_SIGNAL_XFSZ;
1780
1781     case FREEBSD_SIGVTALRM:
1782       return GDB_SIGNAL_VTALRM;
1783
1784     case FREEBSD_SIGPROF:
1785       return GDB_SIGNAL_PROF;
1786
1787     case FREEBSD_SIGWINCH:
1788       return GDB_SIGNAL_WINCH;
1789
1790     case FREEBSD_SIGINFO:
1791       return GDB_SIGNAL_INFO;
1792
1793     case FREEBSD_SIGUSR1:
1794       return GDB_SIGNAL_USR1;
1795
1796     case FREEBSD_SIGUSR2:
1797       return GDB_SIGNAL_USR2;
1798
1799     /* SIGTHR is the same as SIGLWP on FreeBSD. */
1800     case FREEBSD_SIGTHR:
1801       return GDB_SIGNAL_LWP;
1802
1803     case FREEBSD_SIGLIBRT:
1804       return GDB_SIGNAL_LIBRT;
1805     }
1806
1807   if (signal >= FREEBSD_SIGRTMIN && signal <= FREEBSD_SIGRTMAX)
1808     {
1809       int offset = signal - FREEBSD_SIGRTMIN;
1810
1811       return (enum gdb_signal) ((int) GDB_SIGNAL_REALTIME_65 + offset);
1812     }
1813
1814   return GDB_SIGNAL_UNKNOWN;
1815 }
1816
1817 /* Implement the "gdb_signal_to_target" gdbarch method.  */
1818
1819 static int
1820 fbsd_gdb_signal_to_target (struct gdbarch *gdbarch,
1821                 enum gdb_signal signal)
1822 {
1823   switch (signal)
1824     {
1825     case GDB_SIGNAL_0:
1826       return 0;
1827
1828     case GDB_SIGNAL_HUP:
1829       return FREEBSD_SIGHUP;
1830
1831     case GDB_SIGNAL_INT:
1832       return FREEBSD_SIGINT;
1833
1834     case GDB_SIGNAL_QUIT:
1835       return FREEBSD_SIGQUIT;
1836
1837     case GDB_SIGNAL_ILL:
1838       return FREEBSD_SIGILL;
1839
1840     case GDB_SIGNAL_TRAP:
1841       return FREEBSD_SIGTRAP;
1842
1843     case GDB_SIGNAL_ABRT:
1844       return FREEBSD_SIGABRT;
1845
1846     case GDB_SIGNAL_EMT:
1847       return FREEBSD_SIGEMT;
1848
1849     case GDB_SIGNAL_FPE:
1850       return FREEBSD_SIGFPE;
1851
1852     case GDB_SIGNAL_KILL:
1853       return FREEBSD_SIGKILL;
1854
1855     case GDB_SIGNAL_BUS:
1856       return FREEBSD_SIGBUS;
1857
1858     case GDB_SIGNAL_SEGV:
1859       return FREEBSD_SIGSEGV;
1860
1861     case GDB_SIGNAL_SYS:
1862       return FREEBSD_SIGSYS;
1863
1864     case GDB_SIGNAL_PIPE:
1865       return FREEBSD_SIGPIPE;
1866
1867     case GDB_SIGNAL_ALRM:
1868       return FREEBSD_SIGALRM;
1869
1870     case GDB_SIGNAL_TERM:
1871       return FREEBSD_SIGTERM;
1872
1873     case GDB_SIGNAL_URG:
1874       return FREEBSD_SIGURG;
1875
1876     case GDB_SIGNAL_STOP:
1877       return FREEBSD_SIGSTOP;
1878
1879     case GDB_SIGNAL_TSTP:
1880       return FREEBSD_SIGTSTP;
1881
1882     case GDB_SIGNAL_CONT:
1883       return FREEBSD_SIGCONT;
1884
1885     case GDB_SIGNAL_CHLD:
1886       return FREEBSD_SIGCHLD;
1887
1888     case GDB_SIGNAL_TTIN:
1889       return FREEBSD_SIGTTIN;
1890
1891     case GDB_SIGNAL_TTOU:
1892       return FREEBSD_SIGTTOU;
1893
1894     case GDB_SIGNAL_IO:
1895       return FREEBSD_SIGIO;
1896
1897     case GDB_SIGNAL_XCPU:
1898       return FREEBSD_SIGXCPU;
1899
1900     case GDB_SIGNAL_XFSZ:
1901       return FREEBSD_SIGXFSZ;
1902
1903     case GDB_SIGNAL_VTALRM:
1904       return FREEBSD_SIGVTALRM;
1905
1906     case GDB_SIGNAL_PROF:
1907       return FREEBSD_SIGPROF;
1908
1909     case GDB_SIGNAL_WINCH:
1910       return FREEBSD_SIGWINCH;
1911
1912     case GDB_SIGNAL_INFO:
1913       return FREEBSD_SIGINFO;
1914
1915     case GDB_SIGNAL_USR1:
1916       return FREEBSD_SIGUSR1;
1917
1918     case GDB_SIGNAL_USR2:
1919       return FREEBSD_SIGUSR2;
1920
1921     case GDB_SIGNAL_LWP:
1922       return FREEBSD_SIGTHR;
1923
1924     case GDB_SIGNAL_LIBRT:
1925       return FREEBSD_SIGLIBRT;
1926     }
1927
1928   if (signal >= GDB_SIGNAL_REALTIME_65
1929       && signal <= GDB_SIGNAL_REALTIME_126)
1930     {
1931       int offset = signal - GDB_SIGNAL_REALTIME_65;
1932
1933       return FREEBSD_SIGRTMIN + offset;
1934     }
1935
1936   return -1;
1937 }
1938
1939 /* Implement the "get_syscall_number" gdbarch method.  */
1940
1941 static LONGEST
1942 fbsd_get_syscall_number (struct gdbarch *gdbarch, thread_info *thread)
1943 {
1944
1945   /* FreeBSD doesn't use gdbarch_get_syscall_number since FreeBSD
1946      native targets fetch the system call number from the
1947      'pl_syscall_code' member of struct ptrace_lwpinfo in fbsd_wait.
1948      However, system call catching requires this function to be
1949      set.  */
1950
1951   internal_error (__FILE__, __LINE__, _("fbsd_get_sycall_number called"));
1952 }
1953
1954 /* Read an integer symbol value from the current target.  */
1955
1956 static LONGEST
1957 fbsd_read_integer_by_name (struct gdbarch *gdbarch, const char *name)
1958 {
1959   bound_minimal_symbol ms = lookup_minimal_symbol (name, NULL, NULL);
1960   if (ms.minsym == NULL)
1961     error (_("Unable to resolve symbol '%s'"), name);
1962
1963   gdb_byte buf[4];
1964   if (target_read_memory (BMSYMBOL_VALUE_ADDRESS (ms), buf, sizeof buf) != 0)
1965     error (_("Unable to read value of '%s'"), name);
1966
1967   return extract_signed_integer (buf, sizeof buf, gdbarch_byte_order (gdbarch));
1968 }
1969
1970 /* Lookup offsets of fields in the runtime linker's 'Obj_Entry'
1971    structure needed to determine the TLS index of an object file.  */
1972
1973 static void
1974 fbsd_fetch_rtld_offsets (struct gdbarch *gdbarch, struct fbsd_pspace_data *data)
1975 {
1976   try
1977     {
1978       /* Fetch offsets from debug symbols in rtld.  */
1979       struct symbol *obj_entry_sym
1980         = lookup_symbol_in_language ("Struct_Obj_Entry", NULL, STRUCT_DOMAIN,
1981                                      language_c, NULL).symbol;
1982       if (obj_entry_sym == NULL)
1983         error (_("Unable to find Struct_Obj_Entry symbol"));
1984       data->off_linkmap = lookup_struct_elt (SYMBOL_TYPE(obj_entry_sym),
1985                                              "linkmap", 0).offset / 8;
1986       data->off_tlsindex = lookup_struct_elt (SYMBOL_TYPE(obj_entry_sym),
1987                                               "tlsindex", 0).offset / 8;
1988       data->rtld_offsets_valid = true;
1989       return;
1990     }
1991   catch (const gdb_exception_error &e)
1992     {
1993       data->off_linkmap = -1;
1994     }
1995
1996   try
1997     {
1998       /* Fetch offsets from global variables in libthr.  Note that
1999          this does not work for single-threaded processes that are not
2000          linked against libthr.  */
2001       data->off_linkmap = fbsd_read_integer_by_name (gdbarch,
2002                                                      "_thread_off_linkmap");
2003       data->off_tlsindex = fbsd_read_integer_by_name (gdbarch,
2004                                                       "_thread_off_tlsindex");
2005       data->rtld_offsets_valid = true;
2006       return;
2007     }
2008   catch (const gdb_exception_error &e)
2009     {
2010       data->off_linkmap = -1;
2011     }
2012 }
2013
2014 /* Helper function to read the TLS index of an object file associated
2015    with a link map entry at LM_ADDR.  */
2016
2017 static LONGEST
2018 fbsd_get_tls_index (struct gdbarch *gdbarch, CORE_ADDR lm_addr)
2019 {
2020   struct fbsd_pspace_data *data = get_fbsd_pspace_data (current_program_space);
2021
2022   if (!data->rtld_offsets_valid)
2023     fbsd_fetch_rtld_offsets (gdbarch, data);
2024
2025   if (data->off_linkmap == -1)
2026     throw_error (TLS_GENERIC_ERROR,
2027                  _("Cannot fetch runtime linker structure offsets"));
2028
2029   /* Simulate container_of to convert from LM_ADDR to the Obj_Entry
2030      pointer and then compute the offset of the tlsindex member.  */
2031   CORE_ADDR tlsindex_addr = lm_addr - data->off_linkmap + data->off_tlsindex;
2032
2033   gdb_byte buf[4];
2034   if (target_read_memory (tlsindex_addr, buf, sizeof buf) != 0)
2035     throw_error (TLS_GENERIC_ERROR,
2036                  _("Cannot find thread-local variables on this target"));
2037
2038   return extract_signed_integer (buf, sizeof buf, gdbarch_byte_order (gdbarch));
2039 }
2040
2041 /* See fbsd-tdep.h.  */
2042
2043 CORE_ADDR
2044 fbsd_get_thread_local_address (struct gdbarch *gdbarch, CORE_ADDR dtv_addr,
2045                                CORE_ADDR lm_addr, CORE_ADDR offset)
2046 {
2047   LONGEST tls_index = fbsd_get_tls_index (gdbarch, lm_addr);
2048
2049   gdb_byte buf[gdbarch_ptr_bit (gdbarch) / TARGET_CHAR_BIT];
2050   if (target_read_memory (dtv_addr, buf, sizeof buf) != 0)
2051     throw_error (TLS_GENERIC_ERROR,
2052                  _("Cannot find thread-local variables on this target"));
2053
2054   const struct builtin_type *builtin = builtin_type (gdbarch);
2055   CORE_ADDR addr = gdbarch_pointer_to_address (gdbarch,
2056                                                builtin->builtin_data_ptr, buf);
2057
2058   addr += (tls_index + 1) * TYPE_LENGTH (builtin->builtin_data_ptr);
2059   if (target_read_memory (addr, buf, sizeof buf) != 0)
2060     throw_error (TLS_GENERIC_ERROR,
2061                  _("Cannot find thread-local variables on this target"));
2062
2063   addr = gdbarch_pointer_to_address (gdbarch, builtin->builtin_data_ptr, buf);
2064   return addr + offset;
2065 }
2066
2067 /* To be called from GDB_OSABI_FREEBSD handlers. */
2068
2069 void
2070 fbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
2071 {
2072   set_gdbarch_core_pid_to_str (gdbarch, fbsd_core_pid_to_str);
2073   set_gdbarch_core_thread_name (gdbarch, fbsd_core_thread_name);
2074   set_gdbarch_core_xfer_siginfo (gdbarch, fbsd_core_xfer_siginfo);
2075   set_gdbarch_make_corefile_notes (gdbarch, fbsd_make_corefile_notes);
2076   set_gdbarch_core_info_proc (gdbarch, fbsd_core_info_proc);
2077   set_gdbarch_print_auxv_entry (gdbarch, fbsd_print_auxv_entry);
2078   set_gdbarch_get_siginfo_type (gdbarch, fbsd_get_siginfo_type);
2079   set_gdbarch_gdb_signal_from_target (gdbarch, fbsd_gdb_signal_from_target);
2080   set_gdbarch_gdb_signal_to_target (gdbarch, fbsd_gdb_signal_to_target);
2081
2082   /* `catch syscall' */
2083   set_xml_syscall_file_name (gdbarch, "syscalls/freebsd.xml");
2084   set_gdbarch_get_syscall_number (gdbarch, fbsd_get_syscall_number);
2085 }
2086
2087 void
2088 _initialize_fbsd_tdep (void)
2089 {
2090   fbsd_gdbarch_data_handle =
2091     gdbarch_data_register_post_init (init_fbsd_gdbarch_data);
2092 }