1 /* Select target systems and architectures at runtime for GDB.
3 Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
4 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006
5 Free Software Foundation, Inc.
7 Contributed by Cygnus Support.
9 This file is part of GDB.
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 2 of the License, or
14 (at your option) any later version.
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with this program; if not, write to the Free Software
23 Foundation, Inc., 51 Franklin Street, Fifth Floor,
24 Boston, MA 02110-1301, USA. */
28 #include "gdb_string.h"
40 #include "gdb_assert.h"
43 static void target_info (char *, int);
45 static void maybe_kill_then_attach (char *, int);
47 static void kill_or_be_killed (int);
49 static void default_terminal_info (char *, int);
51 static int default_region_ok_for_hw_watchpoint (CORE_ADDR, int);
53 static int nosymbol (char *, CORE_ADDR *);
55 static void tcomplain (void) ATTR_NORETURN;
57 static int nomemory (CORE_ADDR, char *, int, int, struct target_ops *);
59 static int return_zero (void);
61 static int return_one (void);
63 static int return_minus_one (void);
65 void target_ignore (void);
67 static void target_command (char *, int);
69 static struct target_ops *find_default_run_target (char *);
71 static void nosupport_runtime (void);
73 static LONGEST default_xfer_partial (struct target_ops *ops,
74 enum target_object object,
75 const char *annex, gdb_byte *readbuf,
76 const gdb_byte *writebuf,
77 ULONGEST offset, LONGEST len);
79 /* Transfer LEN bytes between target address MEMADDR and GDB address
80 MYADDR. Returns 0 for success, errno code for failure (which
81 includes partial transfers -- if you want a more useful response to
82 partial transfers, try either target_read_memory_partial or
83 target_write_memory_partial). */
85 static int target_xfer_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len,
88 static void init_dummy_target (void);
90 static struct target_ops debug_target;
92 static void debug_to_open (char *, int);
94 static void debug_to_close (int);
96 static void debug_to_attach (char *, int);
98 static void debug_to_detach (char *, int);
100 static void debug_to_resume (ptid_t, int, enum target_signal);
102 static ptid_t debug_to_wait (ptid_t, struct target_waitstatus *);
104 static void debug_to_fetch_registers (int);
106 static void debug_to_store_registers (int);
108 static void debug_to_prepare_to_store (void);
110 static void debug_to_files_info (struct target_ops *);
112 static int debug_to_insert_breakpoint (struct bp_target_info *);
114 static int debug_to_remove_breakpoint (struct bp_target_info *);
116 static int debug_to_can_use_hw_breakpoint (int, int, int);
118 static int debug_to_insert_hw_breakpoint (struct bp_target_info *);
120 static int debug_to_remove_hw_breakpoint (struct bp_target_info *);
122 static int debug_to_insert_watchpoint (CORE_ADDR, int, int);
124 static int debug_to_remove_watchpoint (CORE_ADDR, int, int);
126 static int debug_to_stopped_by_watchpoint (void);
128 static int debug_to_stopped_data_address (struct target_ops *, CORE_ADDR *);
130 static int debug_to_region_ok_for_hw_watchpoint (CORE_ADDR, int);
132 static void debug_to_terminal_init (void);
134 static void debug_to_terminal_inferior (void);
136 static void debug_to_terminal_ours_for_output (void);
138 static void debug_to_terminal_save_ours (void);
140 static void debug_to_terminal_ours (void);
142 static void debug_to_terminal_info (char *, int);
144 static void debug_to_kill (void);
146 static void debug_to_load (char *, int);
148 static int debug_to_lookup_symbol (char *, CORE_ADDR *);
150 static void debug_to_mourn_inferior (void);
152 static int debug_to_can_run (void);
154 static void debug_to_notice_signals (ptid_t);
156 static int debug_to_thread_alive (ptid_t);
158 static void debug_to_stop (void);
160 /* NOTE: cagney/2004-09-29: Many targets reference this variable in
161 wierd and mysterious ways. Putting the variable here lets those
162 wierd and mysterious ways keep building while they are being
163 converted to the inferior inheritance structure. */
164 struct target_ops deprecated_child_ops;
166 /* Pointer to array of target architecture structures; the size of the
167 array; the current index into the array; the allocated size of the
169 struct target_ops **target_structs;
170 unsigned target_struct_size;
171 unsigned target_struct_index;
172 unsigned target_struct_allocsize;
173 #define DEFAULT_ALLOCSIZE 10
175 /* The initial current target, so that there is always a semi-valid
178 static struct target_ops dummy_target;
180 /* Top of target stack. */
182 static struct target_ops *target_stack;
184 /* The target structure we are currently using to talk to a process
185 or file or whatever "inferior" we have. */
187 struct target_ops current_target;
189 /* Command list for target. */
191 static struct cmd_list_element *targetlist = NULL;
193 /* Nonzero if we are debugging an attached outside process
194 rather than an inferior. */
198 /* Non-zero if we want to see trace of target level stuff. */
200 static int targetdebug = 0;
202 show_targetdebug (struct ui_file *file, int from_tty,
203 struct cmd_list_element *c, const char *value)
205 fprintf_filtered (file, _("Target debugging is %s.\n"), value);
208 static void setup_target_debug (void);
210 DCACHE *target_dcache;
212 /* The user just typed 'target' without the name of a target. */
215 target_command (char *arg, int from_tty)
217 fputs_filtered ("Argument required (target name). Try `help target'\n",
221 /* Add a possible target architecture to the list. */
224 add_target (struct target_ops *t)
226 /* Provide default values for all "must have" methods. */
227 if (t->to_xfer_partial == NULL)
228 t->to_xfer_partial = default_xfer_partial;
232 target_struct_allocsize = DEFAULT_ALLOCSIZE;
233 target_structs = (struct target_ops **) xmalloc
234 (target_struct_allocsize * sizeof (*target_structs));
236 if (target_struct_size >= target_struct_allocsize)
238 target_struct_allocsize *= 2;
239 target_structs = (struct target_ops **)
240 xrealloc ((char *) target_structs,
241 target_struct_allocsize * sizeof (*target_structs));
243 target_structs[target_struct_size++] = t;
245 if (targetlist == NULL)
246 add_prefix_cmd ("target", class_run, target_command, _("\
247 Connect to a target machine or process.\n\
248 The first argument is the type or protocol of the target machine.\n\
249 Remaining arguments are interpreted by the target protocol. For more\n\
250 information on the arguments for a particular protocol, type\n\
251 `help target ' followed by the protocol name."),
252 &targetlist, "target ", 0, &cmdlist);
253 add_cmd (t->to_shortname, no_class, t->to_open, t->to_doc, &targetlist);
264 target_load (char *arg, int from_tty)
266 dcache_invalidate (target_dcache);
267 (*current_target.to_load) (arg, from_tty);
271 nomemory (CORE_ADDR memaddr, char *myaddr, int len, int write,
272 struct target_ops *t)
274 errno = EIO; /* Can't read/write this location */
275 return 0; /* No bytes handled */
281 error (_("You can't do that when your target is `%s'"),
282 current_target.to_shortname);
288 error (_("You can't do that without a process to debug."));
292 nosymbol (char *name, CORE_ADDR *addrp)
294 return 1; /* Symbol does not exist in target env */
298 nosupport_runtime (void)
300 if (ptid_equal (inferior_ptid, null_ptid))
303 error (_("No run-time support for this"));
308 default_terminal_info (char *args, int from_tty)
310 printf_unfiltered (_("No saved terminal information.\n"));
313 /* This is the default target_create_inferior and target_attach function.
314 If the current target is executing, it asks whether to kill it off.
315 If this function returns without calling error(), it has killed off
316 the target, and the operation should be attempted. */
319 kill_or_be_killed (int from_tty)
321 if (target_has_execution)
323 printf_unfiltered (_("You are already running a program:\n"));
324 target_files_info ();
325 if (query ("Kill it? "))
328 if (target_has_execution)
329 error (_("Killing the program did not help."));
334 error (_("Program not killed."));
341 maybe_kill_then_attach (char *args, int from_tty)
343 kill_or_be_killed (from_tty);
344 target_attach (args, from_tty);
348 maybe_kill_then_create_inferior (char *exec, char *args, char **env,
351 kill_or_be_killed (0);
352 target_create_inferior (exec, args, env, from_tty);
355 /* Go through the target stack from top to bottom, copying over zero
356 entries in current_target, then filling in still empty entries. In
357 effect, we are doing class inheritance through the pushed target
360 NOTE: cagney/2003-10-17: The problem with this inheritance, as it
361 is currently implemented, is that it discards any knowledge of
362 which target an inherited method originally belonged to.
363 Consequently, new new target methods should instead explicitly and
364 locally search the target stack for the target that can handle the
368 update_current_target (void)
370 struct target_ops *t;
372 /* First, reset curren'ts contents. */
373 memset (¤t_target, 0, sizeof (current_target));
375 #define INHERIT(FIELD, TARGET) \
376 if (!current_target.FIELD) \
377 current_target.FIELD = (TARGET)->FIELD
379 for (t = target_stack; t; t = t->beneath)
381 INHERIT (to_shortname, t);
382 INHERIT (to_longname, t);
384 INHERIT (to_open, t);
385 INHERIT (to_close, t);
386 INHERIT (to_attach, t);
387 INHERIT (to_post_attach, t);
388 INHERIT (to_detach, t);
389 /* Do not inherit to_disconnect. */
390 INHERIT (to_resume, t);
391 INHERIT (to_wait, t);
392 INHERIT (to_fetch_registers, t);
393 INHERIT (to_store_registers, t);
394 INHERIT (to_prepare_to_store, t);
395 INHERIT (deprecated_xfer_memory, t);
396 INHERIT (to_files_info, t);
397 INHERIT (to_insert_breakpoint, t);
398 INHERIT (to_remove_breakpoint, t);
399 INHERIT (to_can_use_hw_breakpoint, t);
400 INHERIT (to_insert_hw_breakpoint, t);
401 INHERIT (to_remove_hw_breakpoint, t);
402 INHERIT (to_insert_watchpoint, t);
403 INHERIT (to_remove_watchpoint, t);
404 INHERIT (to_stopped_data_address, t);
405 INHERIT (to_stopped_by_watchpoint, t);
406 INHERIT (to_have_continuable_watchpoint, t);
407 INHERIT (to_region_ok_for_hw_watchpoint, t);
408 INHERIT (to_terminal_init, t);
409 INHERIT (to_terminal_inferior, t);
410 INHERIT (to_terminal_ours_for_output, t);
411 INHERIT (to_terminal_ours, t);
412 INHERIT (to_terminal_save_ours, t);
413 INHERIT (to_terminal_info, t);
414 INHERIT (to_kill, t);
415 INHERIT (to_load, t);
416 INHERIT (to_lookup_symbol, t);
417 INHERIT (to_create_inferior, t);
418 INHERIT (to_post_startup_inferior, t);
419 INHERIT (to_acknowledge_created_inferior, t);
420 INHERIT (to_insert_fork_catchpoint, t);
421 INHERIT (to_remove_fork_catchpoint, t);
422 INHERIT (to_insert_vfork_catchpoint, t);
423 INHERIT (to_remove_vfork_catchpoint, t);
424 /* Do not inherit to_follow_fork. */
425 INHERIT (to_insert_exec_catchpoint, t);
426 INHERIT (to_remove_exec_catchpoint, t);
427 INHERIT (to_reported_exec_events_per_exec_call, t);
428 INHERIT (to_has_exited, t);
429 INHERIT (to_mourn_inferior, t);
430 INHERIT (to_can_run, t);
431 INHERIT (to_notice_signals, t);
432 INHERIT (to_thread_alive, t);
433 INHERIT (to_find_new_threads, t);
434 INHERIT (to_pid_to_str, t);
435 INHERIT (to_extra_thread_info, t);
436 INHERIT (to_stop, t);
437 /* Do not inherit to_xfer_partial. */
438 INHERIT (to_rcmd, t);
439 INHERIT (to_enable_exception_callback, t);
440 INHERIT (to_get_current_exception_event, t);
441 INHERIT (to_pid_to_exec_file, t);
442 INHERIT (to_stratum, t);
443 INHERIT (to_has_all_memory, t);
444 INHERIT (to_has_memory, t);
445 INHERIT (to_has_stack, t);
446 INHERIT (to_has_registers, t);
447 INHERIT (to_has_execution, t);
448 INHERIT (to_has_thread_control, t);
449 INHERIT (to_sections, t);
450 INHERIT (to_sections_end, t);
451 INHERIT (to_can_async_p, t);
452 INHERIT (to_is_async_p, t);
453 INHERIT (to_async, t);
454 INHERIT (to_async_mask_value, t);
455 INHERIT (to_find_memory_regions, t);
456 INHERIT (to_make_corefile_notes, t);
457 INHERIT (to_get_thread_local_address, t);
458 INHERIT (to_magic, t);
462 /* Clean up a target struct so it no longer has any zero pointers in
463 it. Some entries are defaulted to a method that print an error,
464 others are hard-wired to a standard recursive default. */
466 #define de_fault(field, value) \
467 if (!current_target.field) \
468 current_target.field = value
471 (void (*) (char *, int))
477 maybe_kill_then_attach);
478 de_fault (to_post_attach,
482 (void (*) (char *, int))
485 (void (*) (ptid_t, int, enum target_signal))
488 (ptid_t (*) (ptid_t, struct target_waitstatus *))
490 de_fault (to_fetch_registers,
493 de_fault (to_store_registers,
496 de_fault (to_prepare_to_store,
499 de_fault (deprecated_xfer_memory,
500 (int (*) (CORE_ADDR, gdb_byte *, int, int, struct mem_attrib *, struct target_ops *))
502 de_fault (to_files_info,
503 (void (*) (struct target_ops *))
505 de_fault (to_insert_breakpoint,
506 memory_insert_breakpoint);
507 de_fault (to_remove_breakpoint,
508 memory_remove_breakpoint);
509 de_fault (to_can_use_hw_breakpoint,
510 (int (*) (int, int, int))
512 de_fault (to_insert_hw_breakpoint,
513 (int (*) (struct bp_target_info *))
515 de_fault (to_remove_hw_breakpoint,
516 (int (*) (struct bp_target_info *))
518 de_fault (to_insert_watchpoint,
519 (int (*) (CORE_ADDR, int, int))
521 de_fault (to_remove_watchpoint,
522 (int (*) (CORE_ADDR, int, int))
524 de_fault (to_stopped_by_watchpoint,
527 de_fault (to_stopped_data_address,
528 (int (*) (struct target_ops *, CORE_ADDR *))
530 de_fault (to_region_ok_for_hw_watchpoint,
531 default_region_ok_for_hw_watchpoint);
532 de_fault (to_terminal_init,
535 de_fault (to_terminal_inferior,
538 de_fault (to_terminal_ours_for_output,
541 de_fault (to_terminal_ours,
544 de_fault (to_terminal_save_ours,
547 de_fault (to_terminal_info,
548 default_terminal_info);
553 (void (*) (char *, int))
555 de_fault (to_lookup_symbol,
556 (int (*) (char *, CORE_ADDR *))
558 de_fault (to_create_inferior,
559 maybe_kill_then_create_inferior);
560 de_fault (to_post_startup_inferior,
563 de_fault (to_acknowledge_created_inferior,
566 de_fault (to_insert_fork_catchpoint,
569 de_fault (to_remove_fork_catchpoint,
572 de_fault (to_insert_vfork_catchpoint,
575 de_fault (to_remove_vfork_catchpoint,
578 de_fault (to_insert_exec_catchpoint,
581 de_fault (to_remove_exec_catchpoint,
584 de_fault (to_reported_exec_events_per_exec_call,
587 de_fault (to_has_exited,
588 (int (*) (int, int, int *))
590 de_fault (to_mourn_inferior,
593 de_fault (to_can_run,
595 de_fault (to_notice_signals,
598 de_fault (to_thread_alive,
601 de_fault (to_find_new_threads,
604 de_fault (to_extra_thread_info,
605 (char *(*) (struct thread_info *))
610 current_target.to_xfer_partial = default_xfer_partial;
612 (void (*) (char *, struct ui_file *))
614 de_fault (to_enable_exception_callback,
615 (struct symtab_and_line * (*) (enum exception_event_kind, int))
617 de_fault (to_get_current_exception_event,
618 (struct exception_event_record * (*) (void))
620 de_fault (to_pid_to_exec_file,
623 de_fault (to_can_async_p,
626 de_fault (to_is_async_p,
630 (void (*) (void (*) (enum inferior_event_type, void*), void*))
634 /* Finally, position the target-stack beneath the squashed
635 "current_target". That way code looking for a non-inherited
636 target method can quickly and simply find it. */
637 current_target.beneath = target_stack;
640 /* Push a new target type into the stack of the existing target accessors,
641 possibly superseding some of the existing accessors.
643 Result is zero if the pushed target ended up on top of the stack,
644 nonzero if at least one target is on top of it.
646 Rather than allow an empty stack, we always have the dummy target at
647 the bottom stratum, so we can call the function vectors without
651 push_target (struct target_ops *t)
653 struct target_ops **cur;
655 /* Check magic number. If wrong, it probably means someone changed
656 the struct definition, but not all the places that initialize one. */
657 if (t->to_magic != OPS_MAGIC)
659 fprintf_unfiltered (gdb_stderr,
660 "Magic number of %s target struct wrong\n",
662 internal_error (__FILE__, __LINE__, _("failed internal consistency check"));
665 /* Find the proper stratum to install this target in. */
666 for (cur = &target_stack; (*cur) != NULL; cur = &(*cur)->beneath)
668 if ((int) (t->to_stratum) >= (int) (*cur)->to_stratum)
672 /* If there's already targets at this stratum, remove them. */
673 /* FIXME: cagney/2003-10-15: I think this should be popping all
674 targets to CUR, and not just those at this stratum level. */
675 while ((*cur) != NULL && t->to_stratum == (*cur)->to_stratum)
677 /* There's already something at this stratum level. Close it,
678 and un-hook it from the stack. */
679 struct target_ops *tmp = (*cur);
680 (*cur) = (*cur)->beneath;
682 target_close (tmp, 0);
685 /* We have removed all targets in our stratum, now add the new one. */
689 update_current_target ();
692 setup_target_debug ();
695 return (t != target_stack);
698 /* Remove a target_ops vector from the stack, wherever it may be.
699 Return how many times it was removed (0 or 1). */
702 unpush_target (struct target_ops *t)
704 struct target_ops **cur;
705 struct target_ops *tmp;
707 /* Look for the specified target. Note that we assume that a target
708 can only occur once in the target stack. */
710 for (cur = &target_stack; (*cur) != NULL; cur = &(*cur)->beneath)
717 return 0; /* Didn't find target_ops, quit now */
719 /* NOTE: cagney/2003-12-06: In '94 the close call was made
720 unconditional by moving it to before the above check that the
721 target was in the target stack (something about "Change the way
722 pushing and popping of targets work to support target overlays
723 and inheritance"). This doesn't make much sense - only open
724 targets should be closed. */
727 /* Unchain the target */
729 (*cur) = (*cur)->beneath;
732 update_current_target ();
740 target_close (¤t_target, 0); /* Let it clean up */
741 if (unpush_target (target_stack) == 1)
744 fprintf_unfiltered (gdb_stderr,
745 "pop_target couldn't find target %s\n",
746 current_target.to_shortname);
747 internal_error (__FILE__, __LINE__, _("failed internal consistency check"));
751 #define MIN(A, B) (((A) <= (B)) ? (A) : (B))
753 /* target_read_string -- read a null terminated string, up to LEN bytes,
754 from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful.
755 Set *STRING to a pointer to malloc'd memory containing the data; the caller
756 is responsible for freeing it. Return the number of bytes successfully
760 target_read_string (CORE_ADDR memaddr, char **string, int len, int *errnop)
762 int tlen, origlen, offset, i;
766 int buffer_allocated;
768 unsigned int nbytes_read = 0;
770 /* Small for testing. */
771 buffer_allocated = 4;
772 buffer = xmalloc (buffer_allocated);
779 tlen = MIN (len, 4 - (memaddr & 3));
780 offset = memaddr & 3;
782 errcode = target_read_memory (memaddr & ~3, buf, sizeof buf);
785 /* The transfer request might have crossed the boundary to an
786 unallocated region of memory. Retry the transfer, requesting
790 errcode = target_read_memory (memaddr, buf, 1);
795 if (bufptr - buffer + tlen > buffer_allocated)
798 bytes = bufptr - buffer;
799 buffer_allocated *= 2;
800 buffer = xrealloc (buffer, buffer_allocated);
801 bufptr = buffer + bytes;
804 for (i = 0; i < tlen; i++)
806 *bufptr++ = buf[i + offset];
807 if (buf[i + offset] == '\000')
809 nbytes_read += i + 1;
826 /* Find a section containing ADDR. */
827 struct section_table *
828 target_section_by_addr (struct target_ops *target, CORE_ADDR addr)
830 struct section_table *secp;
831 for (secp = target->to_sections;
832 secp < target->to_sections_end;
835 if (addr >= secp->addr && addr < secp->endaddr)
841 /* Return non-zero when the target vector has supplied an xfer_partial
842 method and it, rather than xfer_memory, should be used. */
844 target_xfer_partial_p (void)
846 return (target_stack != NULL
847 && target_stack->to_xfer_partial != default_xfer_partial);
851 target_xfer_partial (struct target_ops *ops,
852 enum target_object object, const char *annex,
853 void *readbuf, const void *writebuf,
854 ULONGEST offset, LONGEST len)
858 gdb_assert (ops->to_xfer_partial != NULL);
859 retval = ops->to_xfer_partial (ops, object, annex, readbuf, writebuf,
863 const unsigned char *myaddr = NULL;
865 fprintf_unfiltered (gdb_stdlog,
866 "%s:target_xfer_partial (%d, %s, 0x%lx, 0x%lx, 0x%s, %s) = %s",
869 (annex ? annex : "(null)"),
870 (long) readbuf, (long) writebuf,
871 paddr_nz (offset), paddr_d (len), paddr_d (retval));
877 if (retval > 0 && myaddr != NULL)
881 fputs_unfiltered (", bytes =", gdb_stdlog);
882 for (i = 0; i < retval; i++)
884 if ((((long) &(myaddr[i])) & 0xf) == 0)
886 if (targetdebug < 2 && i > 0)
888 fprintf_unfiltered (gdb_stdlog, " ...");
891 fprintf_unfiltered (gdb_stdlog, "\n");
894 fprintf_unfiltered (gdb_stdlog, " %02x", myaddr[i] & 0xff);
898 fputc_unfiltered ('\n', gdb_stdlog);
903 /* Attempt a transfer all LEN bytes starting at OFFSET between the
904 inferior's KIND:ANNEX space and GDB's READBUF/WRITEBUF buffer. If
905 the transfer succeeds, return zero, otherwize the host ERRNO is
908 The inferior is formed from several layers. In the case of
909 corefiles, inf-corefile is layered above inf-exec and a request for
910 text (corefiles do not include text pages) will be first sent to
911 the core-stratum, fail, and then sent to the object-file where it
914 NOTE: cagney/2004-09-30:
916 The old code tried to use four separate mechanisms for mapping an
917 object:offset:len tuple onto an inferior and its address space: the
918 target stack; the inferior's TO_SECTIONS; solib's SO_LIST;
923 The code below is instead using a single mechanism (currently
924 strata). If that mechanism proves insufficient then re-factor it
925 implementing another singluar mechanism (for instance, a generic
926 object:annex onto inferior:object:annex say). */
929 xfer_using_stratum (enum target_object object, const char *annex,
930 ULONGEST offset, LONGEST len, void *readbuf,
931 const void *writebuf)
934 struct target_ops *target;
936 /* Always successful. */
939 /* Never successful. */
940 if (target_stack == NULL)
943 target = target_stack;
946 xfered = target_xfer_partial (target, object, annex,
947 readbuf, writebuf, offset, len);
950 /* The partial xfer succeeded, update the counts, check that
951 the xfer hasn't finished and if it hasn't set things up
952 for the next round. */
958 readbuf = (gdb_byte *) readbuf + xfered;
959 if (writebuf != NULL)
960 writebuf = (gdb_byte *) writebuf + xfered;
961 target = target_stack;
965 /* Something totally screwed up, abandon the attempt to
974 /* This "stratum" didn't work, try the next one down. */
975 target = target->beneath;
982 /* Read LEN bytes of target memory at address MEMADDR, placing the results in
983 GDB's memory at MYADDR. Returns either 0 for success or an errno value
986 If an error occurs, no guarantee is made about the contents of the data at
987 MYADDR. In particular, the caller should not depend upon partial reads
988 filling the buffer with good data. There is no way for the caller to know
989 how much good data might have been transfered anyway. Callers that can
990 deal with partial reads should call target_read_memory_partial. */
993 target_read_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len)
995 if (target_xfer_partial_p ())
996 return xfer_using_stratum (TARGET_OBJECT_MEMORY, NULL,
997 memaddr, len, myaddr, NULL);
999 return target_xfer_memory (memaddr, myaddr, len, 0);
1003 target_write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, int len)
1005 gdb_byte *bytes = alloca (len);
1006 memcpy (bytes, myaddr, len);
1007 if (target_xfer_partial_p ())
1008 return xfer_using_stratum (TARGET_OBJECT_MEMORY, NULL,
1009 memaddr, len, NULL, bytes);
1011 return target_xfer_memory (memaddr, bytes, len, 1);
1014 #ifndef target_stopped_data_address_p
1016 target_stopped_data_address_p (struct target_ops *target)
1018 if (target->to_stopped_data_address
1019 == (int (*) (struct target_ops *, CORE_ADDR *)) return_zero)
1021 if (target->to_stopped_data_address == debug_to_stopped_data_address
1022 && (debug_target.to_stopped_data_address
1023 == (int (*) (struct target_ops *, CORE_ADDR *)) return_zero))
1029 static int trust_readonly = 0;
1031 show_trust_readonly (struct ui_file *file, int from_tty,
1032 struct cmd_list_element *c, const char *value)
1034 fprintf_filtered (file, _("\
1035 Mode for reading from readonly sections is %s.\n"),
1039 /* Move memory to or from the targets. The top target gets priority;
1040 if it cannot handle it, it is offered to the next one down, etc.
1042 Result is -1 on error, or the number of bytes transfered. */
1045 do_xfer_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len, int write,
1046 struct mem_attrib *attrib)
1050 struct target_ops *t;
1052 /* Zero length requests are ok and require no work. */
1056 /* deprecated_xfer_memory is not guaranteed to set errno, even when
1060 if (!write && trust_readonly)
1062 struct section_table *secp;
1063 /* User-settable option, "trust-readonly-sections". If true,
1064 then memory from any SEC_READONLY bfd section may be read
1065 directly from the bfd file. */
1066 secp = target_section_by_addr (¤t_target, memaddr);
1068 && (bfd_get_section_flags (secp->bfd, secp->the_bfd_section)
1070 return xfer_memory (memaddr, myaddr, len, 0, attrib, ¤t_target);
1073 /* The quick case is that the top target can handle the transfer. */
1074 res = current_target.deprecated_xfer_memory
1075 (memaddr, myaddr, len, write, attrib, ¤t_target);
1077 /* If res <= 0 then we call it again in the loop. Ah well. */
1080 for (t = target_stack; t != NULL; t = t->beneath)
1082 if (!t->to_has_memory)
1085 res = t->deprecated_xfer_memory (memaddr, myaddr, len, write, attrib, t);
1087 break; /* Handled all or part of xfer */
1088 if (t->to_has_all_memory)
1100 /* Perform a memory transfer. Iterate until the entire region has
1103 Result is 0 or errno value. */
1106 target_xfer_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len, int write)
1110 struct mem_region *region;
1112 /* Zero length requests are ok and require no work. */
1120 region = lookup_mem_region(memaddr);
1121 if (memaddr + len < region->hi)
1124 reg_len = region->hi - memaddr;
1126 switch (region->attrib.mode)
1141 if (region->attrib.cache)
1142 res = dcache_xfer_memory (target_dcache, memaddr, myaddr,
1145 res = do_xfer_memory (memaddr, myaddr, reg_len, write,
1150 /* If this address is for nonexistent memory, read zeros
1151 if reading, or do nothing if writing. Return
1154 memset (myaddr, 0, len);
1168 return 0; /* We managed to cover it all somehow. */
1172 /* Perform a partial memory transfer.
1174 If we succeed, set *ERR to zero and return the number of bytes transferred.
1175 If we fail, set *ERR to a non-zero errno value, and return -1. */
1178 target_xfer_memory_partial (CORE_ADDR memaddr, gdb_byte *myaddr, int len,
1179 int write_p, int *err)
1183 struct mem_region *region;
1185 /* Zero length requests are ok and require no work. */
1192 region = lookup_mem_region(memaddr);
1193 if (memaddr + len < region->hi)
1196 reg_len = region->hi - memaddr;
1198 switch (region->attrib.mode)
1217 if (region->attrib.cache)
1218 res = dcache_xfer_memory (target_dcache, memaddr, myaddr,
1221 res = do_xfer_memory (memaddr, myaddr, reg_len, write_p,
1239 target_read_memory_partial (CORE_ADDR memaddr, gdb_byte *buf,
1242 if (target_xfer_partial_p ())
1246 retval = target_xfer_partial (target_stack, TARGET_OBJECT_MEMORY,
1247 NULL, buf, NULL, memaddr, len);
1264 return target_xfer_memory_partial (memaddr, buf, len, 0, err);
1268 target_write_memory_partial (CORE_ADDR memaddr, gdb_byte *buf,
1271 if (target_xfer_partial_p ())
1275 retval = target_xfer_partial (target_stack, TARGET_OBJECT_MEMORY,
1276 NULL, NULL, buf, memaddr, len);
1293 return target_xfer_memory_partial (memaddr, buf, len, 1, err);
1296 /* More generic transfers. */
1299 default_xfer_partial (struct target_ops *ops, enum target_object object,
1300 const char *annex, gdb_byte *readbuf,
1301 const gdb_byte *writebuf, ULONGEST offset, LONGEST len)
1303 if (object == TARGET_OBJECT_MEMORY
1304 && ops->deprecated_xfer_memory != NULL)
1305 /* If available, fall back to the target's
1306 "deprecated_xfer_memory" method. */
1310 if (writebuf != NULL)
1312 void *buffer = xmalloc (len);
1313 struct cleanup *cleanup = make_cleanup (xfree, buffer);
1314 memcpy (buffer, writebuf, len);
1315 xfered = ops->deprecated_xfer_memory (offset, buffer, len,
1316 1/*write*/, NULL, ops);
1317 do_cleanups (cleanup);
1319 if (readbuf != NULL)
1320 xfered = ops->deprecated_xfer_memory (offset, readbuf, len, 0/*read*/,
1324 else if (xfered == 0 && errno == 0)
1325 /* "deprecated_xfer_memory" uses 0, cross checked against
1326 ERRNO as one indication of an error. */
1331 else if (ops->beneath != NULL)
1332 return target_xfer_partial (ops->beneath, object, annex,
1333 readbuf, writebuf, offset, len);
1338 /* Target vector read/write partial wrapper functions.
1340 NOTE: cagney/2003-10-21: I wonder if having "to_xfer_partial
1341 (inbuf, outbuf)", instead of separate read/write methods, make life
1345 target_read_partial (struct target_ops *ops,
1346 enum target_object object,
1347 const char *annex, gdb_byte *buf,
1348 ULONGEST offset, LONGEST len)
1350 return target_xfer_partial (ops, object, annex, buf, NULL, offset, len);
1354 target_write_partial (struct target_ops *ops,
1355 enum target_object object,
1356 const char *annex, const gdb_byte *buf,
1357 ULONGEST offset, LONGEST len)
1359 return target_xfer_partial (ops, object, annex, NULL, buf, offset, len);
1362 /* Wrappers to perform the full transfer. */
1364 target_read (struct target_ops *ops,
1365 enum target_object object,
1366 const char *annex, gdb_byte *buf,
1367 ULONGEST offset, LONGEST len)
1370 while (xfered < len)
1372 LONGEST xfer = target_read_partial (ops, object, annex,
1373 (gdb_byte *) buf + xfered,
1374 offset + xfered, len - xfered);
1375 /* Call an observer, notifying them of the xfer progress? */
1387 target_write (struct target_ops *ops,
1388 enum target_object object,
1389 const char *annex, const gdb_byte *buf,
1390 ULONGEST offset, LONGEST len)
1393 while (xfered < len)
1395 LONGEST xfer = target_write_partial (ops, object, annex,
1396 (gdb_byte *) buf + xfered,
1397 offset + xfered, len - xfered);
1398 /* Call an observer, notifying them of the xfer progress? */
1409 /* Wrapper to perform a full read of unknown size. OBJECT/ANNEX will
1410 be read using OPS. The return value will be -1 if the transfer
1411 fails or is not supported; 0 if the object is empty; or the length
1412 of the object otherwise. If a positive value is returned, a
1413 sufficiently large buffer will be allocated using xmalloc and
1414 returned in *BUF_P containing the contents of the object.
1416 This method should be used for objects sufficiently small to store
1417 in a single xmalloc'd buffer, when no fixed bound on the object's
1418 size is known in advance. Don't try to read TARGET_OBJECT_MEMORY
1419 through this function. */
1422 target_read_alloc (struct target_ops *ops,
1423 enum target_object object,
1424 const char *annex, gdb_byte **buf_p)
1426 size_t buf_alloc, buf_pos;
1430 /* This function does not have a length parameter; it reads the
1431 entire OBJECT). Also, it doesn't support objects fetched partly
1432 from one target and partly from another (in a different stratum,
1433 e.g. a core file and an executable). Both reasons make it
1434 unsuitable for reading memory. */
1435 gdb_assert (object != TARGET_OBJECT_MEMORY);
1437 /* Start by reading up to 4K at a time. The target will throttle
1438 this number down if necessary. */
1440 buf = xmalloc (buf_alloc);
1444 n = target_read_partial (ops, object, annex, &buf[buf_pos],
1445 buf_pos, buf_alloc - buf_pos);
1448 /* An error occurred. */
1454 /* Read all there was. */
1464 /* If the buffer is filling up, expand it. */
1465 if (buf_alloc < buf_pos * 2)
1468 buf = xrealloc (buf, buf_alloc);
1475 /* Memory transfer methods. */
1478 get_target_memory (struct target_ops *ops, CORE_ADDR addr, gdb_byte *buf,
1481 if (target_read (ops, TARGET_OBJECT_MEMORY, NULL, buf, addr, len)
1483 memory_error (EIO, addr);
1487 get_target_memory_unsigned (struct target_ops *ops,
1488 CORE_ADDR addr, int len)
1490 gdb_byte buf[sizeof (ULONGEST)];
1492 gdb_assert (len <= sizeof (buf));
1493 get_target_memory (ops, addr, buf, len);
1494 return extract_unsigned_integer (buf, len);
1498 target_info (char *args, int from_tty)
1500 struct target_ops *t;
1501 int has_all_mem = 0;
1503 if (symfile_objfile != NULL)
1504 printf_unfiltered (_("Symbols from \"%s\".\n"), symfile_objfile->name);
1506 for (t = target_stack; t != NULL; t = t->beneath)
1508 if (!t->to_has_memory)
1511 if ((int) (t->to_stratum) <= (int) dummy_stratum)
1514 printf_unfiltered (_("\tWhile running this, GDB does not access memory from...\n"));
1515 printf_unfiltered ("%s:\n", t->to_longname);
1516 (t->to_files_info) (t);
1517 has_all_mem = t->to_has_all_memory;
1521 /* This is to be called by the open routine before it does
1525 target_preopen (int from_tty)
1529 if (target_has_execution)
1532 || query (_("A program is being debugged already. Kill it? ")))
1535 error (_("Program not killed."));
1538 /* Calling target_kill may remove the target from the stack. But if
1539 it doesn't (which seems like a win for UDI), remove it now. */
1541 if (target_has_execution)
1545 /* Detach a target after doing deferred register stores. */
1548 target_detach (char *args, int from_tty)
1550 (current_target.to_detach) (args, from_tty);
1554 target_disconnect (char *args, int from_tty)
1556 struct target_ops *t;
1558 for (t = current_target.beneath; t != NULL; t = t->beneath)
1559 if (t->to_disconnect != NULL)
1562 fprintf_unfiltered (gdb_stdlog, "target_disconnect (%s, %d)\n",
1564 t->to_disconnect (t, args, from_tty);
1572 target_async_mask (int mask)
1574 int saved_async_masked_status = target_async_mask_value;
1575 target_async_mask_value = mask;
1576 return saved_async_masked_status;
1579 /* Look through the list of possible targets for a target that can
1583 target_follow_fork (int follow_child)
1585 struct target_ops *t;
1587 for (t = current_target.beneath; t != NULL; t = t->beneath)
1589 if (t->to_follow_fork != NULL)
1591 int retval = t->to_follow_fork (t, follow_child);
1593 fprintf_unfiltered (gdb_stdlog, "target_follow_fork (%d) = %d\n",
1594 follow_child, retval);
1599 /* Some target returned a fork event, but did not know how to follow it. */
1600 internal_error (__FILE__, __LINE__,
1601 "could not find a target to follow fork");
1604 /* Look through the list of possible targets for a target that can
1605 execute a run or attach command without any other data. This is
1606 used to locate the default process stratum.
1608 Result is always valid (error() is called for errors). */
1610 static struct target_ops *
1611 find_default_run_target (char *do_mesg)
1613 struct target_ops **t;
1614 struct target_ops *runable = NULL;
1619 for (t = target_structs; t < target_structs + target_struct_size;
1622 if ((*t)->to_can_run && target_can_run (*t))
1630 error (_("Don't know how to %s. Try \"help target\"."), do_mesg);
1636 find_default_attach (char *args, int from_tty)
1638 struct target_ops *t;
1640 t = find_default_run_target ("attach");
1641 (t->to_attach) (args, from_tty);
1646 find_default_create_inferior (char *exec_file, char *allargs, char **env,
1649 struct target_ops *t;
1651 t = find_default_run_target ("run");
1652 (t->to_create_inferior) (exec_file, allargs, env, from_tty);
1657 default_region_ok_for_hw_watchpoint (CORE_ADDR addr, int len)
1659 return (len <= TYPE_LENGTH (builtin_type_void_data_ptr));
1675 return_minus_one (void)
1681 * Resize the to_sections pointer. Also make sure that anyone that
1682 * was holding on to an old value of it gets updated.
1683 * Returns the old size.
1687 target_resize_to_sections (struct target_ops *target, int num_added)
1689 struct target_ops **t;
1690 struct section_table *old_value;
1693 old_value = target->to_sections;
1695 if (target->to_sections)
1697 old_count = target->to_sections_end - target->to_sections;
1698 target->to_sections = (struct section_table *)
1699 xrealloc ((char *) target->to_sections,
1700 (sizeof (struct section_table)) * (num_added + old_count));
1705 target->to_sections = (struct section_table *)
1706 xmalloc ((sizeof (struct section_table)) * num_added);
1708 target->to_sections_end = target->to_sections + (num_added + old_count);
1710 /* Check to see if anyone else was pointing to this structure.
1711 If old_value was null, then no one was. */
1715 for (t = target_structs; t < target_structs + target_struct_size;
1718 if ((*t)->to_sections == old_value)
1720 (*t)->to_sections = target->to_sections;
1721 (*t)->to_sections_end = target->to_sections_end;
1724 /* There is a flattened view of the target stack in current_target,
1725 so its to_sections pointer might also need updating. */
1726 if (current_target.to_sections == old_value)
1728 current_target.to_sections = target->to_sections;
1729 current_target.to_sections_end = target->to_sections_end;
1737 /* Remove all target sections taken from ABFD.
1739 Scan the current target stack for targets whose section tables
1740 refer to sections from BFD, and remove those sections. We use this
1741 when we notice that the inferior has unloaded a shared object, for
1744 remove_target_sections (bfd *abfd)
1746 struct target_ops **t;
1748 for (t = target_structs; t < target_structs + target_struct_size; t++)
1750 struct section_table *src, *dest;
1752 dest = (*t)->to_sections;
1753 for (src = (*t)->to_sections; src < (*t)->to_sections_end; src++)
1754 if (src->bfd != abfd)
1756 /* Keep this section. */
1757 if (dest < src) *dest = *src;
1761 /* If we've dropped any sections, resize the section table. */
1763 target_resize_to_sections (*t, dest - src);
1770 /* Find a single runnable target in the stack and return it. If for
1771 some reason there is more than one, return NULL. */
1774 find_run_target (void)
1776 struct target_ops **t;
1777 struct target_ops *runable = NULL;
1782 for (t = target_structs; t < target_structs + target_struct_size; ++t)
1784 if ((*t)->to_can_run && target_can_run (*t))
1791 return (count == 1 ? runable : NULL);
1794 /* Find a single core_stratum target in the list of targets and return it.
1795 If for some reason there is more than one, return NULL. */
1798 find_core_target (void)
1800 struct target_ops **t;
1801 struct target_ops *runable = NULL;
1806 for (t = target_structs; t < target_structs + target_struct_size;
1809 if ((*t)->to_stratum == core_stratum)
1816 return (count == 1 ? runable : NULL);
1820 * Find the next target down the stack from the specified target.
1824 find_target_beneath (struct target_ops *t)
1830 /* The inferior process has died. Long live the inferior! */
1833 generic_mourn_inferior (void)
1835 extern int show_breakpoint_hit_counts;
1837 inferior_ptid = null_ptid;
1839 breakpoint_init_inferior (inf_exited);
1840 registers_changed ();
1842 reopen_exec_file ();
1843 reinit_frame_cache ();
1845 /* It is confusing to the user for ignore counts to stick around
1846 from previous runs of the inferior. So clear them. */
1847 /* However, it is more confusing for the ignore counts to disappear when
1848 using hit counts. So don't clear them if we're counting hits. */
1849 if (!show_breakpoint_hit_counts)
1850 breakpoint_clear_ignore_counts ();
1852 if (deprecated_detach_hook)
1853 deprecated_detach_hook ();
1856 /* Helper function for child_wait and the Lynx derivatives of child_wait.
1857 HOSTSTATUS is the waitstatus from wait() or the equivalent; store our
1858 translation of that in OURSTATUS. */
1860 store_waitstatus (struct target_waitstatus *ourstatus, int hoststatus)
1862 #ifdef CHILD_SPECIAL_WAITSTATUS
1863 /* CHILD_SPECIAL_WAITSTATUS should return nonzero and set *OURSTATUS
1864 if it wants to deal with hoststatus. */
1865 if (CHILD_SPECIAL_WAITSTATUS (ourstatus, hoststatus))
1869 if (WIFEXITED (hoststatus))
1871 ourstatus->kind = TARGET_WAITKIND_EXITED;
1872 ourstatus->value.integer = WEXITSTATUS (hoststatus);
1874 else if (!WIFSTOPPED (hoststatus))
1876 ourstatus->kind = TARGET_WAITKIND_SIGNALLED;
1877 ourstatus->value.sig = target_signal_from_host (WTERMSIG (hoststatus));
1881 ourstatus->kind = TARGET_WAITKIND_STOPPED;
1882 ourstatus->value.sig = target_signal_from_host (WSTOPSIG (hoststatus));
1886 /* Returns zero to leave the inferior alone, one to interrupt it. */
1887 int (*target_activity_function) (void);
1888 int target_activity_fd;
1890 /* Convert a normal process ID to a string. Returns the string in a
1894 normal_pid_to_str (ptid_t ptid)
1896 static char buf[32];
1898 xsnprintf (buf, sizeof buf, "process %d", ptid_get_pid (ptid));
1902 /* Error-catcher for target_find_memory_regions */
1903 static int dummy_find_memory_regions (int (*ignore1) (), void *ignore2)
1905 error (_("No target."));
1909 /* Error-catcher for target_make_corefile_notes */
1910 static char * dummy_make_corefile_notes (bfd *ignore1, int *ignore2)
1912 error (_("No target."));
1916 /* Set up the handful of non-empty slots needed by the dummy target
1920 init_dummy_target (void)
1922 dummy_target.to_shortname = "None";
1923 dummy_target.to_longname = "None";
1924 dummy_target.to_doc = "";
1925 dummy_target.to_attach = find_default_attach;
1926 dummy_target.to_create_inferior = find_default_create_inferior;
1927 dummy_target.to_pid_to_str = normal_pid_to_str;
1928 dummy_target.to_stratum = dummy_stratum;
1929 dummy_target.to_find_memory_regions = dummy_find_memory_regions;
1930 dummy_target.to_make_corefile_notes = dummy_make_corefile_notes;
1931 dummy_target.to_xfer_partial = default_xfer_partial;
1932 dummy_target.to_magic = OPS_MAGIC;
1936 debug_to_open (char *args, int from_tty)
1938 debug_target.to_open (args, from_tty);
1940 fprintf_unfiltered (gdb_stdlog, "target_open (%s, %d)\n", args, from_tty);
1944 debug_to_close (int quitting)
1946 target_close (&debug_target, quitting);
1947 fprintf_unfiltered (gdb_stdlog, "target_close (%d)\n", quitting);
1951 target_close (struct target_ops *targ, int quitting)
1953 if (targ->to_xclose != NULL)
1954 targ->to_xclose (targ, quitting);
1955 else if (targ->to_close != NULL)
1956 targ->to_close (quitting);
1960 debug_to_attach (char *args, int from_tty)
1962 debug_target.to_attach (args, from_tty);
1964 fprintf_unfiltered (gdb_stdlog, "target_attach (%s, %d)\n", args, from_tty);
1969 debug_to_post_attach (int pid)
1971 debug_target.to_post_attach (pid);
1973 fprintf_unfiltered (gdb_stdlog, "target_post_attach (%d)\n", pid);
1977 debug_to_detach (char *args, int from_tty)
1979 debug_target.to_detach (args, from_tty);
1981 fprintf_unfiltered (gdb_stdlog, "target_detach (%s, %d)\n", args, from_tty);
1985 debug_to_resume (ptid_t ptid, int step, enum target_signal siggnal)
1987 debug_target.to_resume (ptid, step, siggnal);
1989 fprintf_unfiltered (gdb_stdlog, "target_resume (%d, %s, %s)\n", PIDGET (ptid),
1990 step ? "step" : "continue",
1991 target_signal_to_name (siggnal));
1995 debug_to_wait (ptid_t ptid, struct target_waitstatus *status)
1999 retval = debug_target.to_wait (ptid, status);
2001 fprintf_unfiltered (gdb_stdlog,
2002 "target_wait (%d, status) = %d, ", PIDGET (ptid),
2004 fprintf_unfiltered (gdb_stdlog, "status->kind = ");
2005 switch (status->kind)
2007 case TARGET_WAITKIND_EXITED:
2008 fprintf_unfiltered (gdb_stdlog, "exited, status = %d\n",
2009 status->value.integer);
2011 case TARGET_WAITKIND_STOPPED:
2012 fprintf_unfiltered (gdb_stdlog, "stopped, signal = %s\n",
2013 target_signal_to_name (status->value.sig));
2015 case TARGET_WAITKIND_SIGNALLED:
2016 fprintf_unfiltered (gdb_stdlog, "signalled, signal = %s\n",
2017 target_signal_to_name (status->value.sig));
2019 case TARGET_WAITKIND_LOADED:
2020 fprintf_unfiltered (gdb_stdlog, "loaded\n");
2022 case TARGET_WAITKIND_FORKED:
2023 fprintf_unfiltered (gdb_stdlog, "forked\n");
2025 case TARGET_WAITKIND_VFORKED:
2026 fprintf_unfiltered (gdb_stdlog, "vforked\n");
2028 case TARGET_WAITKIND_EXECD:
2029 fprintf_unfiltered (gdb_stdlog, "execd\n");
2031 case TARGET_WAITKIND_SPURIOUS:
2032 fprintf_unfiltered (gdb_stdlog, "spurious\n");
2035 fprintf_unfiltered (gdb_stdlog, "unknown???\n");
2043 debug_print_register (const char * func, int regno)
2045 fprintf_unfiltered (gdb_stdlog, "%s ", func);
2046 if (regno >= 0 && regno < NUM_REGS + NUM_PSEUDO_REGS
2047 && REGISTER_NAME (regno) != NULL && REGISTER_NAME (regno)[0] != '\0')
2048 fprintf_unfiltered (gdb_stdlog, "(%s)", REGISTER_NAME (regno));
2050 fprintf_unfiltered (gdb_stdlog, "(%d)", regno);
2054 unsigned char buf[MAX_REGISTER_SIZE];
2055 deprecated_read_register_gen (regno, buf);
2056 fprintf_unfiltered (gdb_stdlog, " = ");
2057 for (i = 0; i < register_size (current_gdbarch, regno); i++)
2059 fprintf_unfiltered (gdb_stdlog, "%02x", buf[i]);
2061 if (register_size (current_gdbarch, regno) <= sizeof (LONGEST))
2063 fprintf_unfiltered (gdb_stdlog, " 0x%s %s",
2064 paddr_nz (read_register (regno)),
2065 paddr_d (read_register (regno)));
2068 fprintf_unfiltered (gdb_stdlog, "\n");
2072 debug_to_fetch_registers (int regno)
2074 debug_target.to_fetch_registers (regno);
2075 debug_print_register ("target_fetch_registers", regno);
2079 debug_to_store_registers (int regno)
2081 debug_target.to_store_registers (regno);
2082 debug_print_register ("target_store_registers", regno);
2083 fprintf_unfiltered (gdb_stdlog, "\n");
2087 debug_to_prepare_to_store (void)
2089 debug_target.to_prepare_to_store ();
2091 fprintf_unfiltered (gdb_stdlog, "target_prepare_to_store ()\n");
2095 deprecated_debug_xfer_memory (CORE_ADDR memaddr, bfd_byte *myaddr, int len,
2096 int write, struct mem_attrib *attrib,
2097 struct target_ops *target)
2101 retval = debug_target.deprecated_xfer_memory (memaddr, myaddr, len, write,
2104 fprintf_unfiltered (gdb_stdlog,
2105 "target_xfer_memory (0x%x, xxx, %d, %s, xxx) = %d",
2106 (unsigned int) memaddr, /* possable truncate long long */
2107 len, write ? "write" : "read", retval);
2113 fputs_unfiltered (", bytes =", gdb_stdlog);
2114 for (i = 0; i < retval; i++)
2116 if ((((long) &(myaddr[i])) & 0xf) == 0)
2118 if (targetdebug < 2 && i > 0)
2120 fprintf_unfiltered (gdb_stdlog, " ...");
2123 fprintf_unfiltered (gdb_stdlog, "\n");
2126 fprintf_unfiltered (gdb_stdlog, " %02x", myaddr[i] & 0xff);
2130 fputc_unfiltered ('\n', gdb_stdlog);
2136 debug_to_files_info (struct target_ops *target)
2138 debug_target.to_files_info (target);
2140 fprintf_unfiltered (gdb_stdlog, "target_files_info (xxx)\n");
2144 debug_to_insert_breakpoint (struct bp_target_info *bp_tgt)
2148 retval = debug_target.to_insert_breakpoint (bp_tgt);
2150 fprintf_unfiltered (gdb_stdlog,
2151 "target_insert_breakpoint (0x%lx, xxx) = %ld\n",
2152 (unsigned long) bp_tgt->placed_address,
2153 (unsigned long) retval);
2158 debug_to_remove_breakpoint (struct bp_target_info *bp_tgt)
2162 retval = debug_target.to_remove_breakpoint (bp_tgt);
2164 fprintf_unfiltered (gdb_stdlog,
2165 "target_remove_breakpoint (0x%lx, xxx) = %ld\n",
2166 (unsigned long) bp_tgt->placed_address,
2167 (unsigned long) retval);
2172 debug_to_can_use_hw_breakpoint (int type, int cnt, int from_tty)
2176 retval = debug_target.to_can_use_hw_breakpoint (type, cnt, from_tty);
2178 fprintf_unfiltered (gdb_stdlog,
2179 "target_can_use_hw_breakpoint (%ld, %ld, %ld) = %ld\n",
2180 (unsigned long) type,
2181 (unsigned long) cnt,
2182 (unsigned long) from_tty,
2183 (unsigned long) retval);
2188 debug_to_region_ok_for_hw_watchpoint (CORE_ADDR addr, int len)
2192 retval = debug_target.to_region_ok_for_hw_watchpoint (addr, len);
2194 fprintf_unfiltered (gdb_stdlog,
2195 "TARGET_REGION_OK_FOR_HW_WATCHPOINT (%ld, %ld) = 0x%lx\n",
2196 (unsigned long) addr,
2197 (unsigned long) len,
2198 (unsigned long) retval);
2203 debug_to_stopped_by_watchpoint (void)
2207 retval = debug_target.to_stopped_by_watchpoint ();
2209 fprintf_unfiltered (gdb_stdlog,
2210 "STOPPED_BY_WATCHPOINT () = %ld\n",
2211 (unsigned long) retval);
2216 debug_to_stopped_data_address (struct target_ops *target, CORE_ADDR *addr)
2220 retval = debug_target.to_stopped_data_address (target, addr);
2222 fprintf_unfiltered (gdb_stdlog,
2223 "target_stopped_data_address ([0x%lx]) = %ld\n",
2224 (unsigned long)*addr,
2225 (unsigned long)retval);
2230 debug_to_insert_hw_breakpoint (struct bp_target_info *bp_tgt)
2234 retval = debug_target.to_insert_hw_breakpoint (bp_tgt);
2236 fprintf_unfiltered (gdb_stdlog,
2237 "target_insert_hw_breakpoint (0x%lx, xxx) = %ld\n",
2238 (unsigned long) bp_tgt->placed_address,
2239 (unsigned long) retval);
2244 debug_to_remove_hw_breakpoint (struct bp_target_info *bp_tgt)
2248 retval = debug_target.to_remove_hw_breakpoint (bp_tgt);
2250 fprintf_unfiltered (gdb_stdlog,
2251 "target_remove_hw_breakpoint (0x%lx, xxx) = %ld\n",
2252 (unsigned long) bp_tgt->placed_address,
2253 (unsigned long) retval);
2258 debug_to_insert_watchpoint (CORE_ADDR addr, int len, int type)
2262 retval = debug_target.to_insert_watchpoint (addr, len, type);
2264 fprintf_unfiltered (gdb_stdlog,
2265 "target_insert_watchpoint (0x%lx, %d, %d) = %ld\n",
2266 (unsigned long) addr, len, type, (unsigned long) retval);
2271 debug_to_remove_watchpoint (CORE_ADDR addr, int len, int type)
2275 retval = debug_target.to_insert_watchpoint (addr, len, type);
2277 fprintf_unfiltered (gdb_stdlog,
2278 "target_insert_watchpoint (0x%lx, %d, %d) = %ld\n",
2279 (unsigned long) addr, len, type, (unsigned long) retval);
2284 debug_to_terminal_init (void)
2286 debug_target.to_terminal_init ();
2288 fprintf_unfiltered (gdb_stdlog, "target_terminal_init ()\n");
2292 debug_to_terminal_inferior (void)
2294 debug_target.to_terminal_inferior ();
2296 fprintf_unfiltered (gdb_stdlog, "target_terminal_inferior ()\n");
2300 debug_to_terminal_ours_for_output (void)
2302 debug_target.to_terminal_ours_for_output ();
2304 fprintf_unfiltered (gdb_stdlog, "target_terminal_ours_for_output ()\n");
2308 debug_to_terminal_ours (void)
2310 debug_target.to_terminal_ours ();
2312 fprintf_unfiltered (gdb_stdlog, "target_terminal_ours ()\n");
2316 debug_to_terminal_save_ours (void)
2318 debug_target.to_terminal_save_ours ();
2320 fprintf_unfiltered (gdb_stdlog, "target_terminal_save_ours ()\n");
2324 debug_to_terminal_info (char *arg, int from_tty)
2326 debug_target.to_terminal_info (arg, from_tty);
2328 fprintf_unfiltered (gdb_stdlog, "target_terminal_info (%s, %d)\n", arg,
2333 debug_to_kill (void)
2335 debug_target.to_kill ();
2337 fprintf_unfiltered (gdb_stdlog, "target_kill ()\n");
2341 debug_to_load (char *args, int from_tty)
2343 debug_target.to_load (args, from_tty);
2345 fprintf_unfiltered (gdb_stdlog, "target_load (%s, %d)\n", args, from_tty);
2349 debug_to_lookup_symbol (char *name, CORE_ADDR *addrp)
2353 retval = debug_target.to_lookup_symbol (name, addrp);
2355 fprintf_unfiltered (gdb_stdlog, "target_lookup_symbol (%s, xxx)\n", name);
2361 debug_to_create_inferior (char *exec_file, char *args, char **env,
2364 debug_target.to_create_inferior (exec_file, args, env, from_tty);
2366 fprintf_unfiltered (gdb_stdlog, "target_create_inferior (%s, %s, xxx, %d)\n",
2367 exec_file, args, from_tty);
2371 debug_to_post_startup_inferior (ptid_t ptid)
2373 debug_target.to_post_startup_inferior (ptid);
2375 fprintf_unfiltered (gdb_stdlog, "target_post_startup_inferior (%d)\n",
2380 debug_to_acknowledge_created_inferior (int pid)
2382 debug_target.to_acknowledge_created_inferior (pid);
2384 fprintf_unfiltered (gdb_stdlog, "target_acknowledge_created_inferior (%d)\n",
2389 debug_to_insert_fork_catchpoint (int pid)
2391 debug_target.to_insert_fork_catchpoint (pid);
2393 fprintf_unfiltered (gdb_stdlog, "target_insert_fork_catchpoint (%d)\n",
2398 debug_to_remove_fork_catchpoint (int pid)
2402 retval = debug_target.to_remove_fork_catchpoint (pid);
2404 fprintf_unfiltered (gdb_stdlog, "target_remove_fork_catchpoint (%d) = %d\n",
2411 debug_to_insert_vfork_catchpoint (int pid)
2413 debug_target.to_insert_vfork_catchpoint (pid);
2415 fprintf_unfiltered (gdb_stdlog, "target_insert_vfork_catchpoint (%d)\n",
2420 debug_to_remove_vfork_catchpoint (int pid)
2424 retval = debug_target.to_remove_vfork_catchpoint (pid);
2426 fprintf_unfiltered (gdb_stdlog, "target_remove_vfork_catchpoint (%d) = %d\n",
2433 debug_to_insert_exec_catchpoint (int pid)
2435 debug_target.to_insert_exec_catchpoint (pid);
2437 fprintf_unfiltered (gdb_stdlog, "target_insert_exec_catchpoint (%d)\n",
2442 debug_to_remove_exec_catchpoint (int pid)
2446 retval = debug_target.to_remove_exec_catchpoint (pid);
2448 fprintf_unfiltered (gdb_stdlog, "target_remove_exec_catchpoint (%d) = %d\n",
2455 debug_to_reported_exec_events_per_exec_call (void)
2457 int reported_exec_events;
2459 reported_exec_events = debug_target.to_reported_exec_events_per_exec_call ();
2461 fprintf_unfiltered (gdb_stdlog,
2462 "target_reported_exec_events_per_exec_call () = %d\n",
2463 reported_exec_events);
2465 return reported_exec_events;
2469 debug_to_has_exited (int pid, int wait_status, int *exit_status)
2473 has_exited = debug_target.to_has_exited (pid, wait_status, exit_status);
2475 fprintf_unfiltered (gdb_stdlog, "target_has_exited (%d, %d, %d) = %d\n",
2476 pid, wait_status, *exit_status, has_exited);
2482 debug_to_mourn_inferior (void)
2484 debug_target.to_mourn_inferior ();
2486 fprintf_unfiltered (gdb_stdlog, "target_mourn_inferior ()\n");
2490 debug_to_can_run (void)
2494 retval = debug_target.to_can_run ();
2496 fprintf_unfiltered (gdb_stdlog, "target_can_run () = %d\n", retval);
2502 debug_to_notice_signals (ptid_t ptid)
2504 debug_target.to_notice_signals (ptid);
2506 fprintf_unfiltered (gdb_stdlog, "target_notice_signals (%d)\n",
2511 debug_to_thread_alive (ptid_t ptid)
2515 retval = debug_target.to_thread_alive (ptid);
2517 fprintf_unfiltered (gdb_stdlog, "target_thread_alive (%d) = %d\n",
2518 PIDGET (ptid), retval);
2524 debug_to_find_new_threads (void)
2526 debug_target.to_find_new_threads ();
2528 fputs_unfiltered ("target_find_new_threads ()\n", gdb_stdlog);
2532 debug_to_stop (void)
2534 debug_target.to_stop ();
2536 fprintf_unfiltered (gdb_stdlog, "target_stop ()\n");
2540 debug_to_rcmd (char *command,
2541 struct ui_file *outbuf)
2543 debug_target.to_rcmd (command, outbuf);
2544 fprintf_unfiltered (gdb_stdlog, "target_rcmd (%s, ...)\n", command);
2547 static struct symtab_and_line *
2548 debug_to_enable_exception_callback (enum exception_event_kind kind, int enable)
2550 struct symtab_and_line *result;
2551 result = debug_target.to_enable_exception_callback (kind, enable);
2552 fprintf_unfiltered (gdb_stdlog,
2553 "target get_exception_callback_sal (%d, %d)\n",
2558 static struct exception_event_record *
2559 debug_to_get_current_exception_event (void)
2561 struct exception_event_record *result;
2562 result = debug_target.to_get_current_exception_event ();
2563 fprintf_unfiltered (gdb_stdlog, "target get_current_exception_event ()\n");
2568 debug_to_pid_to_exec_file (int pid)
2572 exec_file = debug_target.to_pid_to_exec_file (pid);
2574 fprintf_unfiltered (gdb_stdlog, "target_pid_to_exec_file (%d) = %s\n",
2581 setup_target_debug (void)
2583 memcpy (&debug_target, ¤t_target, sizeof debug_target);
2585 current_target.to_open = debug_to_open;
2586 current_target.to_close = debug_to_close;
2587 current_target.to_attach = debug_to_attach;
2588 current_target.to_post_attach = debug_to_post_attach;
2589 current_target.to_detach = debug_to_detach;
2590 current_target.to_resume = debug_to_resume;
2591 current_target.to_wait = debug_to_wait;
2592 current_target.to_fetch_registers = debug_to_fetch_registers;
2593 current_target.to_store_registers = debug_to_store_registers;
2594 current_target.to_prepare_to_store = debug_to_prepare_to_store;
2595 current_target.deprecated_xfer_memory = deprecated_debug_xfer_memory;
2596 current_target.to_files_info = debug_to_files_info;
2597 current_target.to_insert_breakpoint = debug_to_insert_breakpoint;
2598 current_target.to_remove_breakpoint = debug_to_remove_breakpoint;
2599 current_target.to_can_use_hw_breakpoint = debug_to_can_use_hw_breakpoint;
2600 current_target.to_insert_hw_breakpoint = debug_to_insert_hw_breakpoint;
2601 current_target.to_remove_hw_breakpoint = debug_to_remove_hw_breakpoint;
2602 current_target.to_insert_watchpoint = debug_to_insert_watchpoint;
2603 current_target.to_remove_watchpoint = debug_to_remove_watchpoint;
2604 current_target.to_stopped_by_watchpoint = debug_to_stopped_by_watchpoint;
2605 current_target.to_stopped_data_address = debug_to_stopped_data_address;
2606 current_target.to_region_ok_for_hw_watchpoint = debug_to_region_ok_for_hw_watchpoint;
2607 current_target.to_terminal_init = debug_to_terminal_init;
2608 current_target.to_terminal_inferior = debug_to_terminal_inferior;
2609 current_target.to_terminal_ours_for_output = debug_to_terminal_ours_for_output;
2610 current_target.to_terminal_ours = debug_to_terminal_ours;
2611 current_target.to_terminal_save_ours = debug_to_terminal_save_ours;
2612 current_target.to_terminal_info = debug_to_terminal_info;
2613 current_target.to_kill = debug_to_kill;
2614 current_target.to_load = debug_to_load;
2615 current_target.to_lookup_symbol = debug_to_lookup_symbol;
2616 current_target.to_create_inferior = debug_to_create_inferior;
2617 current_target.to_post_startup_inferior = debug_to_post_startup_inferior;
2618 current_target.to_acknowledge_created_inferior = debug_to_acknowledge_created_inferior;
2619 current_target.to_insert_fork_catchpoint = debug_to_insert_fork_catchpoint;
2620 current_target.to_remove_fork_catchpoint = debug_to_remove_fork_catchpoint;
2621 current_target.to_insert_vfork_catchpoint = debug_to_insert_vfork_catchpoint;
2622 current_target.to_remove_vfork_catchpoint = debug_to_remove_vfork_catchpoint;
2623 current_target.to_insert_exec_catchpoint = debug_to_insert_exec_catchpoint;
2624 current_target.to_remove_exec_catchpoint = debug_to_remove_exec_catchpoint;
2625 current_target.to_reported_exec_events_per_exec_call = debug_to_reported_exec_events_per_exec_call;
2626 current_target.to_has_exited = debug_to_has_exited;
2627 current_target.to_mourn_inferior = debug_to_mourn_inferior;
2628 current_target.to_can_run = debug_to_can_run;
2629 current_target.to_notice_signals = debug_to_notice_signals;
2630 current_target.to_thread_alive = debug_to_thread_alive;
2631 current_target.to_find_new_threads = debug_to_find_new_threads;
2632 current_target.to_stop = debug_to_stop;
2633 current_target.to_rcmd = debug_to_rcmd;
2634 current_target.to_enable_exception_callback = debug_to_enable_exception_callback;
2635 current_target.to_get_current_exception_event = debug_to_get_current_exception_event;
2636 current_target.to_pid_to_exec_file = debug_to_pid_to_exec_file;
2640 static char targ_desc[] =
2641 "Names of targets and files being debugged.\n\
2642 Shows the entire stack of targets currently in use (including the exec-file,\n\
2643 core-file, and process, if any), as well as the symbol file name.";
2646 do_monitor_command (char *cmd,
2649 if ((current_target.to_rcmd
2650 == (void (*) (char *, struct ui_file *)) tcomplain)
2651 || (current_target.to_rcmd == debug_to_rcmd
2652 && (debug_target.to_rcmd
2653 == (void (*) (char *, struct ui_file *)) tcomplain)))
2654 error (_("\"monitor\" command not supported by this target."));
2655 target_rcmd (cmd, gdb_stdtarg);
2659 initialize_targets (void)
2661 init_dummy_target ();
2662 push_target (&dummy_target);
2664 add_info ("target", target_info, targ_desc);
2665 add_info ("files", target_info, targ_desc);
2667 add_setshow_zinteger_cmd ("target", class_maintenance, &targetdebug, _("\
2668 Set target debugging."), _("\
2669 Show target debugging."), _("\
2670 When non-zero, target debugging is enabled. Higher numbers are more\n\
2671 verbose. Changes do not take effect until the next \"run\" or \"target\"\n\
2675 &setdebuglist, &showdebuglist);
2677 add_setshow_boolean_cmd ("trust-readonly-sections", class_support,
2678 &trust_readonly, _("\
2679 Set mode for reading from readonly sections."), _("\
2680 Show mode for reading from readonly sections."), _("\
2681 When this mode is on, memory reads from readonly sections (such as .text)\n\
2682 will be read from the object file instead of from the target. This will\n\
2683 result in significant performance improvement for remote targets."),
2685 show_trust_readonly,
2686 &setlist, &showlist);
2688 add_com ("monitor", class_obscure, do_monitor_command,
2689 _("Send a command to the remote monitor (remote targets only)."));
2691 target_dcache = dcache_init ();