1 /* Core dump and executable file functions below target vector, for GDB.
3 Copyright (C) 1986-2018 Free Software Foundation, Inc.
5 This file is part of GDB.
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.
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.
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/>. */
21 #include "arch-utils.h"
24 #ifdef HAVE_SYS_FILE_H
25 #include <sys/file.h> /* needed for F_OK and friends */
27 #include "frame.h" /* required by inferior.h */
35 #include "gdbthread.h"
40 #include "readline/readline.h"
42 #include "filenames.h"
43 #include "progspace.h"
46 #include "completer.h"
47 #include "filestuff.h"
53 static core_fns
*sniff_core_bfd (gdbarch
*core_gdbarch
,
56 /* The core file target. */
58 static const target_info core_target_info
= {
60 N_("Local core dump file"),
61 N_("Use a core file as a target. Specify the filename of the core file.")
64 class core_target final
: public target_ops
68 ~core_target () override
;
70 const target_info
&info () const override
71 { return core_target_info
; }
73 void close () override
;
74 void detach (inferior
*, int) override
;
75 void fetch_registers (struct regcache
*, int) override
;
77 enum target_xfer_status
xfer_partial (enum target_object object
,
80 const gdb_byte
*writebuf
,
81 ULONGEST offset
, ULONGEST len
,
82 ULONGEST
*xfered_len
) override
;
83 void files_info () override
;
85 bool thread_alive (ptid_t ptid
) override
;
86 const struct target_desc
*read_description () override
;
88 const char *pid_to_str (ptid_t
) override
;
90 const char *thread_name (struct thread_info
*) override
;
92 bool has_memory () override
;
93 bool has_stack () override
;
94 bool has_registers () override
;
95 bool info_proc (const char *, enum info_proc_what
) override
;
99 /* Getter, see variable definition. */
100 struct gdbarch
*core_gdbarch ()
102 return m_core_gdbarch
;
105 /* See definition. */
106 void get_core_register_section (struct regcache
*regcache
,
107 const struct regset
*regset
,
111 const char *human_name
,
114 private: /* per-core data */
116 /* The core's section table. Note that these target sections are
117 *not* mapped in the current address spaces' set of target
118 sections --- those should come only from pure executable or
119 shared library bfds. The core bfd sections are an implementation
120 detail of the core target, just like ptrace is for unix child
122 target_section_table m_core_section_table
{};
124 /* The core_fns for a core file handler that is prepared to read the
125 core file currently open on core_bfd. */
126 core_fns
*m_core_vec
= NULL
;
128 /* FIXME: kettenis/20031023: Eventually this field should
130 struct gdbarch
*m_core_gdbarch
= NULL
;
133 core_target::core_target ()
135 to_stratum
= process_stratum
;
137 m_core_gdbarch
= gdbarch_from_bfd (core_bfd
);
139 /* Find a suitable core file handler to munch on core_bfd */
140 m_core_vec
= sniff_core_bfd (m_core_gdbarch
, core_bfd
);
142 /* Find the data section */
143 if (build_section_table (core_bfd
,
144 &m_core_section_table
.sections
,
145 &m_core_section_table
.sections_end
))
146 error (_("\"%s\": Can't find sections: %s"),
147 bfd_get_filename (core_bfd
), bfd_errmsg (bfd_get_error ()));
150 core_target::~core_target ()
152 xfree (m_core_section_table
.sections
);
155 /* List of all available core_fns. On gdb startup, each core file
156 register reader calls deprecated_add_core_fns() to register
157 information on each core format it is prepared to read. */
159 static struct core_fns
*core_file_fns
= NULL
;
161 static int gdb_check_format (bfd
*);
163 static void add_to_thread_list (bfd
*, asection
*, void *);
165 /* An arbitrary identifier for the core inferior. */
166 #define CORELOW_PID 1
168 /* Link a new core_fns into the global core_file_fns list. Called on
169 gdb startup by the _initialize routine in each core file register
170 reader, to register information about each format the reader is
171 prepared to handle. */
174 deprecated_add_core_fns (struct core_fns
*cf
)
176 cf
->next
= core_file_fns
;
180 /* The default function that core file handlers can use to examine a
181 core file BFD and decide whether or not to accept the job of
182 reading the core file. */
185 default_core_sniffer (struct core_fns
*our_fns
, bfd
*abfd
)
189 result
= (bfd_get_flavour (abfd
) == our_fns
-> core_flavour
);
193 /* Walk through the list of core functions to find a set that can
194 handle the core file open on ABFD. Returns pointer to set that is
197 static struct core_fns
*
198 sniff_core_bfd (struct gdbarch
*core_gdbarch
, bfd
*abfd
)
201 struct core_fns
*yummy
= NULL
;
204 /* Don't sniff if we have support for register sets in
206 if (core_gdbarch
&& gdbarch_iterate_over_regset_sections_p (core_gdbarch
))
209 for (cf
= core_file_fns
; cf
!= NULL
; cf
= cf
->next
)
211 if (cf
->core_sniffer (cf
, abfd
))
219 warning (_("\"%s\": ambiguous core format, %d handlers match"),
220 bfd_get_filename (abfd
), matches
);
222 else if (matches
== 0)
223 error (_("\"%s\": no core file handler recognizes format"),
224 bfd_get_filename (abfd
));
229 /* The default is to reject every core file format we see. Either
230 BFD has to recognize it, or we have to provide a function in the
231 core file handler that recognizes it. */
234 default_check_format (bfd
*abfd
)
239 /* Attempt to recognize core file formats that BFD rejects. */
242 gdb_check_format (bfd
*abfd
)
246 for (cf
= core_file_fns
; cf
!= NULL
; cf
= cf
->next
)
248 if (cf
->check_format (abfd
))
256 /* Close the core target. */
259 core_target::close ()
263 inferior_ptid
= null_ptid
; /* Avoid confusion from thread
265 exit_inferior_silent (current_inferior ());
267 /* Clear out solib state while the bfd is still open. See
268 comments in clear_solib in solib.c. */
271 current_program_space
->cbfd
.reset (nullptr);
274 /* Core targets are heap-allocated (see core_target_open), so here
275 we delete ourselves. */
279 /* Look for sections whose names start with `.reg/' so that we can
280 extract the list of threads in a core file. */
283 add_to_thread_list (bfd
*abfd
, asection
*asect
, void *reg_sect_arg
)
288 asection
*reg_sect
= (asection
*) reg_sect_arg
;
290 struct inferior
*inf
;
292 if (!startswith (bfd_section_name (abfd
, asect
), ".reg/"))
295 core_tid
= atoi (bfd_section_name (abfd
, asect
) + 5);
297 pid
= bfd_core_file_pid (core_bfd
);
306 inf
= current_inferior ();
309 inferior_appeared (inf
, pid
);
310 inf
->fake_pid_p
= fake_pid_p
;
313 ptid
= ptid_t (pid
, lwpid
, 0);
317 /* Warning, Will Robinson, looking at BFD private data! */
320 && asect
->filepos
== reg_sect
->filepos
) /* Did we find .reg? */
321 inferior_ptid
= ptid
; /* Yes, make it current. */
324 /* Issue a message saying we have no core to debug, if FROM_TTY. */
327 maybe_say_no_core_file_now (int from_tty
)
330 printf_filtered (_("No core file now.\n"));
333 /* Backward compatability with old way of specifying core files. */
336 core_file_command (const char *filename
, int from_tty
)
338 dont_repeat (); /* Either way, seems bogus. */
340 if (filename
== NULL
)
342 if (core_bfd
!= NULL
)
344 target_detach (current_inferior (), from_tty
);
345 gdb_assert (core_bfd
== NULL
);
348 maybe_say_no_core_file_now (from_tty
);
351 core_target_open (filename
, from_tty
);
357 core_target_open (const char *arg
, int from_tty
)
364 target_preopen (from_tty
);
368 error (_("No core file specified. (Use `detach' "
369 "to stop debugging a core file.)"));
371 error (_("No core file specified."));
374 gdb::unique_xmalloc_ptr
<char> filename (tilde_expand (arg
));
375 if (!IS_ABSOLUTE_PATH (filename
.get ()))
376 filename
.reset (concat (current_directory
, "/",
377 filename
.get (), (char *) NULL
));
379 flags
= O_BINARY
| O_LARGEFILE
;
384 scratch_chan
= gdb_open_cloexec (filename
.get (), flags
, 0);
385 if (scratch_chan
< 0)
386 perror_with_name (filename
.get ());
388 gdb_bfd_ref_ptr
temp_bfd (gdb_bfd_fopen (filename
.get (), gnutarget
,
389 write_files
? FOPEN_RUB
: FOPEN_RB
,
391 if (temp_bfd
== NULL
)
392 perror_with_name (filename
.get ());
394 if (!bfd_check_format (temp_bfd
.get (), bfd_core
)
395 && !gdb_check_format (temp_bfd
.get ()))
397 /* Do it after the err msg */
398 /* FIXME: should be checking for errors from bfd_close (for one
399 thing, on error it does not free all the storage associated
401 error (_("\"%s\" is not a core dump: %s"),
402 filename
.get (), bfd_errmsg (bfd_get_error ()));
405 current_program_space
->cbfd
= std::move (temp_bfd
);
407 core_target
*target
= new core_target ();
409 /* Own the target until it is successfully pushed. */
410 target_ops_up
target_holder (target
);
414 /* If we have no exec file, try to set the architecture from the
415 core file. We don't do this unconditionally since an exec file
416 typically contains more information that helps us determine the
417 architecture than a core file. */
419 set_gdbarch_from_file (core_bfd
);
421 push_target (target
);
422 target_holder
.release ();
424 /* Do this before acknowledging the inferior, so if
425 post_create_inferior throws (can happen easilly if you're loading
426 a core file with the wrong exec), we aren't left with threads
427 from the previous inferior. */
430 inferior_ptid
= null_ptid
;
432 /* Need to flush the register cache (and the frame cache) from a
433 previous debug session. If inferior_ptid ends up the same as the
434 last debug session --- e.g., b foo; run; gcore core1; step; gcore
435 core2; core core1; core core2 --- then there's potential for
436 get_current_regcache to return the cached regcache of the
437 previous session, and the frame cache being stale. */
438 registers_changed ();
440 /* Build up thread list from BFD sections, and possibly set the
441 current thread to the .reg/NN section matching the .reg
443 bfd_map_over_sections (core_bfd
, add_to_thread_list
,
444 bfd_get_section_by_name (core_bfd
, ".reg"));
446 if (inferior_ptid
== null_ptid
)
448 /* Either we found no .reg/NN section, and hence we have a
449 non-threaded core (single-threaded, from gdb's perspective),
450 or for some reason add_to_thread_list couldn't determine
451 which was the "main" thread. The latter case shouldn't
452 usually happen, but we're dealing with input here, which can
453 always be broken in different ways. */
454 thread_info
*thread
= first_thread_of_inferior (current_inferior ());
458 inferior_appeared (current_inferior (), CORELOW_PID
);
459 inferior_ptid
= ptid_t (CORELOW_PID
);
460 add_thread_silent (inferior_ptid
);
463 switch_to_thread (thread
);
466 post_create_inferior (target
, from_tty
);
468 /* Now go through the target stack looking for threads since there
469 may be a thread_stratum target loaded on top of target core by
470 now. The layer above should claim threads found in the BFD
474 target_update_thread_list ();
477 CATCH (except
, RETURN_MASK_ERROR
)
479 exception_print (gdb_stderr
, except
);
483 p
= bfd_core_file_failing_command (core_bfd
);
485 printf_filtered (_("Core was generated by `%s'.\n"), p
);
487 /* Clearing any previous state of convenience variables. */
488 clear_exit_convenience_vars ();
490 siggy
= bfd_core_file_failing_signal (core_bfd
);
493 gdbarch
*core_gdbarch
= target
->core_gdbarch ();
495 /* If we don't have a CORE_GDBARCH to work with, assume a native
496 core (map gdb_signal from host signals). If we do have
497 CORE_GDBARCH to work with, but no gdb_signal_from_target
498 implementation for that gdbarch, as a fallback measure,
499 assume the host signal mapping. It'll be correct for native
500 cores, but most likely incorrect for cross-cores. */
501 enum gdb_signal sig
= (core_gdbarch
!= NULL
502 && gdbarch_gdb_signal_from_target_p (core_gdbarch
)
503 ? gdbarch_gdb_signal_from_target (core_gdbarch
,
505 : gdb_signal_from_host (siggy
));
507 printf_filtered (_("Program terminated with signal %s, %s.\n"),
508 gdb_signal_to_name (sig
), gdb_signal_to_string (sig
));
510 /* Set the value of the internal variable $_exitsignal,
511 which holds the signal uncaught by the inferior. */
512 set_internalvar_integer (lookup_internalvar ("_exitsignal"),
516 /* Fetch all registers from core file. */
517 target_fetch_registers (get_current_regcache (), -1);
519 /* Now, set up the frame cache, and print the top of stack. */
520 reinit_frame_cache ();
521 print_stack_frame (get_selected_frame (NULL
), 1, SRC_AND_LOC
, 1);
523 /* Current thread should be NUM 1 but the user does not know that.
524 If a program is single threaded gdb in general does not mention
525 anything about threads. That is why the test is >= 2. */
526 if (thread_count () >= 2)
530 thread_command (NULL
, from_tty
);
532 CATCH (except
, RETURN_MASK_ERROR
)
534 exception_print (gdb_stderr
, except
);
541 core_target::detach (inferior
*inf
, int from_tty
)
543 /* Note that 'this' is dangling after this call. unpush_target
544 closes the target, and our close implementation deletes
546 unpush_target (this);
548 reinit_frame_cache ();
549 maybe_say_no_core_file_now (from_tty
);
552 /* Try to retrieve registers from a section in core_bfd, and supply
553 them to m_core_vec->core_read_registers, as the register set
556 If ptid's lwp member is zero, do the single-threaded
557 thing: look for a section named NAME. If ptid's lwp
558 member is non-zero, do the multi-threaded thing: look for a section
559 named "NAME/LWP", where LWP is the shortest ASCII decimal
560 representation of ptid's lwp member.
562 HUMAN_NAME is a human-readable name for the kind of registers the
563 NAME section contains, for use in error messages.
565 If REQUIRED is true, print an error if the core file doesn't have a
566 section by the appropriate name. Otherwise, just do nothing. */
569 core_target::get_core_register_section (struct regcache
*regcache
,
570 const struct regset
*regset
,
574 const char *human_name
,
577 struct bfd_section
*section
;
580 bool variable_size_section
= (regset
!= NULL
581 && regset
->flags
& REGSET_VARIABLE_SIZE
);
583 thread_section_name
section_name (name
, regcache
->ptid ());
585 section
= bfd_get_section_by_name (core_bfd
, section_name
.c_str ());
589 warning (_("Couldn't find %s registers in core file."),
594 size
= bfd_section_size (core_bfd
, section
);
597 warning (_("Section `%s' in core file too small."),
598 section_name
.c_str ());
601 if (size
!= min_size
&& !variable_size_section
)
603 warning (_("Unexpected size of section `%s' in core file."),
604 section_name
.c_str ());
607 contents
= (char *) alloca (size
);
608 if (! bfd_get_section_contents (core_bfd
, section
, contents
,
611 warning (_("Couldn't read %s registers from `%s' section in core file."),
612 human_name
, section_name
.c_str ());
618 regset
->supply_regset (regset
, regcache
, -1, contents
, size
);
622 gdb_assert (m_core_vec
!= nullptr);
623 m_core_vec
->core_read_registers (regcache
, contents
, size
, which
,
625 bfd_section_vma (core_bfd
, section
)));
628 /* Data passed to gdbarch_iterate_over_regset_sections's callback. */
629 struct get_core_registers_cb_data
632 struct regcache
*regcache
;
635 /* Callback for get_core_registers that handles a single core file
636 register note section. */
639 get_core_registers_cb (const char *sect_name
, int size
,
640 const struct regset
*regset
,
641 const char *human_name
, void *cb_data
)
643 auto *data
= (get_core_registers_cb_data
*) cb_data
;
644 bool required
= false;
646 if (strcmp (sect_name
, ".reg") == 0)
649 if (human_name
== NULL
)
650 human_name
= "general-purpose";
652 else if (strcmp (sect_name
, ".reg2") == 0)
654 if (human_name
== NULL
)
655 human_name
= "floating-point";
658 /* The 'which' parameter is only used when no regset is provided.
659 Thus we just set it to -1. */
660 data
->target
->get_core_register_section (data
->regcache
, regset
, sect_name
,
661 size
, -1, human_name
, required
);
664 /* Get the registers out of a core file. This is the machine-
665 independent part. Fetch_core_registers is the machine-dependent
666 part, typically implemented in the xm-file for each
669 /* We just get all the registers, so we don't use regno. */
672 core_target::fetch_registers (struct regcache
*regcache
, int regno
)
675 struct gdbarch
*gdbarch
;
677 if (!(m_core_gdbarch
!= nullptr
678 && gdbarch_iterate_over_regset_sections_p (m_core_gdbarch
))
679 && (m_core_vec
== NULL
|| m_core_vec
->core_read_registers
== NULL
))
681 fprintf_filtered (gdb_stderr
,
682 "Can't fetch registers from this type of core file\n");
686 gdbarch
= regcache
->arch ();
687 if (gdbarch_iterate_over_regset_sections_p (gdbarch
))
689 get_core_registers_cb_data data
= { this, regcache
};
690 gdbarch_iterate_over_regset_sections (gdbarch
,
691 get_core_registers_cb
,
692 (void *) &data
, NULL
);
696 get_core_register_section (regcache
, NULL
,
697 ".reg", 0, 0, "general-purpose", 1);
698 get_core_register_section (regcache
, NULL
,
699 ".reg2", 0, 2, "floating-point", 0);
702 /* Mark all registers not found in the core as unavailable. */
703 for (i
= 0; i
< gdbarch_num_regs (regcache
->arch ()); i
++)
704 if (regcache
->get_register_status (i
) == REG_UNKNOWN
)
705 regcache
->raw_supply (i
, NULL
);
709 core_target::files_info ()
711 print_section_info (&m_core_section_table
, core_bfd
);
724 add_to_spuid_list (bfd
*abfd
, asection
*asect
, void *list_p
)
726 struct spuid_list
*list
= (struct spuid_list
*) list_p
;
727 enum bfd_endian byte_order
728 = bfd_big_endian (abfd
) ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
731 sscanf (bfd_section_name (abfd
, asect
), "SPU/%d/regs%n", &fd
, &pos
);
735 if (list
->pos
>= list
->offset
&& list
->pos
+ 4 <= list
->offset
+ list
->len
)
737 store_unsigned_integer (list
->buf
+ list
->pos
- list
->offset
,
744 enum target_xfer_status
745 core_target::xfer_partial (enum target_object object
, const char *annex
,
746 gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
747 ULONGEST offset
, ULONGEST len
, ULONGEST
*xfered_len
)
751 case TARGET_OBJECT_MEMORY
:
752 return (section_table_xfer_memory_partial
754 offset
, len
, xfered_len
,
755 m_core_section_table
.sections
,
756 m_core_section_table
.sections_end
,
759 case TARGET_OBJECT_AUXV
:
762 /* When the aux vector is stored in core file, BFD
763 represents this with a fake section called ".auxv". */
765 struct bfd_section
*section
;
768 section
= bfd_get_section_by_name (core_bfd
, ".auxv");
770 return TARGET_XFER_E_IO
;
772 size
= bfd_section_size (core_bfd
, section
);
774 return TARGET_XFER_EOF
;
780 return TARGET_XFER_EOF
;
781 if (!bfd_get_section_contents (core_bfd
, section
, readbuf
,
782 (file_ptr
) offset
, size
))
784 warning (_("Couldn't read NT_AUXV note in core file."));
785 return TARGET_XFER_E_IO
;
788 *xfered_len
= (ULONGEST
) size
;
789 return TARGET_XFER_OK
;
791 return TARGET_XFER_E_IO
;
793 case TARGET_OBJECT_WCOOKIE
:
796 /* When the StackGhost cookie is stored in core file, BFD
797 represents this with a fake section called
800 struct bfd_section
*section
;
803 section
= bfd_get_section_by_name (core_bfd
, ".wcookie");
805 return TARGET_XFER_E_IO
;
807 size
= bfd_section_size (core_bfd
, section
);
809 return TARGET_XFER_EOF
;
815 return TARGET_XFER_EOF
;
816 if (!bfd_get_section_contents (core_bfd
, section
, readbuf
,
817 (file_ptr
) offset
, size
))
819 warning (_("Couldn't read StackGhost cookie in core file."));
820 return TARGET_XFER_E_IO
;
823 *xfered_len
= (ULONGEST
) size
;
824 return TARGET_XFER_OK
;
827 return TARGET_XFER_E_IO
;
829 case TARGET_OBJECT_LIBRARIES
:
830 if (m_core_gdbarch
!= nullptr
831 && gdbarch_core_xfer_shared_libraries_p (m_core_gdbarch
))
834 return TARGET_XFER_E_IO
;
837 *xfered_len
= gdbarch_core_xfer_shared_libraries (m_core_gdbarch
,
841 if (*xfered_len
== 0)
842 return TARGET_XFER_EOF
;
844 return TARGET_XFER_OK
;
849 case TARGET_OBJECT_LIBRARIES_AIX
:
850 if (m_core_gdbarch
!= nullptr
851 && gdbarch_core_xfer_shared_libraries_aix_p (m_core_gdbarch
))
854 return TARGET_XFER_E_IO
;
858 = gdbarch_core_xfer_shared_libraries_aix (m_core_gdbarch
,
862 if (*xfered_len
== 0)
863 return TARGET_XFER_EOF
;
865 return TARGET_XFER_OK
;
870 case TARGET_OBJECT_SPU
:
871 if (readbuf
&& annex
)
873 /* When the SPU contexts are stored in a core file, BFD
874 represents this with a fake section called
877 struct bfd_section
*section
;
879 char sectionstr
[100];
881 xsnprintf (sectionstr
, sizeof sectionstr
, "SPU/%s", annex
);
883 section
= bfd_get_section_by_name (core_bfd
, sectionstr
);
885 return TARGET_XFER_E_IO
;
887 size
= bfd_section_size (core_bfd
, section
);
889 return TARGET_XFER_EOF
;
895 return TARGET_XFER_EOF
;
896 if (!bfd_get_section_contents (core_bfd
, section
, readbuf
,
897 (file_ptr
) offset
, size
))
899 warning (_("Couldn't read SPU section in core file."));
900 return TARGET_XFER_E_IO
;
903 *xfered_len
= (ULONGEST
) size
;
904 return TARGET_XFER_OK
;
908 /* NULL annex requests list of all present spuids. */
909 struct spuid_list list
;
912 list
.offset
= offset
;
916 bfd_map_over_sections (core_bfd
, add_to_spuid_list
, &list
);
918 if (list
.written
== 0)
919 return TARGET_XFER_EOF
;
922 *xfered_len
= (ULONGEST
) list
.written
;
923 return TARGET_XFER_OK
;
926 return TARGET_XFER_E_IO
;
928 case TARGET_OBJECT_SIGNAL_INFO
:
931 if (m_core_gdbarch
!= nullptr
932 && gdbarch_core_xfer_siginfo_p (m_core_gdbarch
))
934 LONGEST l
= gdbarch_core_xfer_siginfo (m_core_gdbarch
, readbuf
,
941 return TARGET_XFER_EOF
;
943 return TARGET_XFER_OK
;
947 return TARGET_XFER_E_IO
;
950 return this->beneath ()->xfer_partial (object
, annex
, readbuf
,
951 writebuf
, offset
, len
,
958 /* Okay, let's be honest: threads gleaned from a core file aren't
959 exactly lively, are they? On the other hand, if we don't claim
960 that each & every one is alive, then we don't get any of them
961 to appear in an "info thread" command, which is quite a useful
965 core_target::thread_alive (ptid_t ptid
)
970 /* Ask the current architecture what it knows about this core file.
971 That will be used, in turn, to pick a better architecture. This
972 wrapper could be avoided if targets got a chance to specialize
975 const struct target_desc
*
976 core_target::read_description ()
978 if (m_core_gdbarch
&& gdbarch_core_read_description_p (m_core_gdbarch
))
980 const struct target_desc
*result
;
982 result
= gdbarch_core_read_description (m_core_gdbarch
, this, core_bfd
);
987 return this->beneath ()->read_description ();
991 core_target::pid_to_str (ptid_t ptid
)
994 struct inferior
*inf
;
997 /* The preferred way is to have a gdbarch/OS specific
999 if (m_core_gdbarch
!= nullptr
1000 && gdbarch_core_pid_to_str_p (m_core_gdbarch
))
1001 return gdbarch_core_pid_to_str (m_core_gdbarch
, ptid
);
1003 /* Otherwise, if we don't have one, we'll just fallback to
1004 "process", with normal_pid_to_str. */
1006 /* Try the LWPID field first. */
1009 return normal_pid_to_str (ptid_t (pid
));
1011 /* Otherwise, this isn't a "threaded" core -- use the PID field, but
1012 only if it isn't a fake PID. */
1013 inf
= find_inferior_ptid (ptid
);
1014 if (inf
!= NULL
&& !inf
->fake_pid_p
)
1015 return normal_pid_to_str (ptid
);
1017 /* No luck. We simply don't have a valid PID to print. */
1018 xsnprintf (buf
, sizeof buf
, "<main task>");
1023 core_target::thread_name (struct thread_info
*thr
)
1025 if (m_core_gdbarch
!= nullptr
1026 && gdbarch_core_thread_name_p (m_core_gdbarch
))
1027 return gdbarch_core_thread_name (m_core_gdbarch
, thr
);
1032 core_target::has_memory ()
1034 return (core_bfd
!= NULL
);
1038 core_target::has_stack ()
1040 return (core_bfd
!= NULL
);
1044 core_target::has_registers ()
1046 return (core_bfd
!= NULL
);
1049 /* Implement the to_info_proc method. */
1052 core_target::info_proc (const char *args
, enum info_proc_what request
)
1054 struct gdbarch
*gdbarch
= get_current_arch ();
1056 /* Since this is the core file target, call the 'core_info_proc'
1057 method on gdbarch, not 'info_proc'. */
1058 if (gdbarch_core_info_proc_p (gdbarch
))
1059 gdbarch_core_info_proc (gdbarch
, args
, request
);
1065 _initialize_corelow (void)
1067 add_target (core_target_info
, core_target_open
, filename_completer
);