1 /* Internal interfaces for the GNU/Linux specific target code for gdbserver.
2 Copyright (C) 2002-2020 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>. */
19 #ifndef GDBSERVER_LINUX_LOW_H
20 #define GDBSERVER_LINUX_LOW_H
22 #include "nat/linux-nat.h"
23 #include "nat/gdb_thread_db.h"
26 #include "gdbthread.h"
27 #include "gdb_proc_service.h"
29 /* Included for ptrace type definitions. */
30 #include "nat/linux-ptrace.h"
31 #include "target/waitstatus.h" /* For enum target_stop_reason. */
32 #include "tracepoint.h"
34 #define PTRACE_XFER_TYPE long
36 #ifdef HAVE_LINUX_REGSETS
37 typedef void (*regset_fill_func
) (struct regcache
*, void *);
38 typedef void (*regset_store_func
) (struct regcache
*, const void *);
43 OPTIONAL_REGS
, /* Do not error if the regset cannot be accessed. */
46 /* The arch's regsets array initializer must be terminated with a NULL
49 { 0, 0, 0, -1, (enum regset_type) -1, NULL, NULL }
53 int get_request
, set_request
;
54 /* If NT_TYPE isn't 0, it will be passed to ptrace as the 3rd
55 argument and the 4th argument should be "const struct iovec *". */
58 enum regset_type type
;
59 regset_fill_func fill_function
;
60 regset_store_func store_function
;
63 /* Aggregation of all the supported regsets of a given
68 /* The regsets array. */
69 struct regset_info
*regsets
;
71 /* The number of regsets in the REGSETS array. */
74 /* If we get EIO on a regset, do not try it again. Note the set of
75 supported regsets may depend on processor mode on biarch
76 machines. This is a (lazily allocated) array holding one boolean
77 byte (0/1) per regset, with each element corresponding to the
78 regset in the REGSETS array above at the same offset. */
79 char *disabled_regsets
;
84 /* Mapping between the general-purpose registers in `struct user'
85 format and GDB's register array layout. */
89 /* The number of registers accessible. */
92 /* The registers map. */
96 /* All info needed to access an architecture/mode's registers. */
100 /* Regset support bitmap: 1 for registers that are transferred as a part
101 of a regset, 0 for ones that need to be handled individually. This
102 can be NULL if all registers are transferred with regsets or regsets
103 are not supported. */
104 unsigned char *regset_bitmap
;
106 /* Info used when accessing registers with PTRACE_PEEKUSER /
107 PTRACE_POKEUSER. This can be NULL if all registers are
108 transferred with regsets .*/
109 struct usrregs_info
*usrregs
;
111 #ifdef HAVE_LINUX_REGSETS
112 /* Info used when accessing registers with regsets. */
113 struct regsets_info
*regsets_info
;
117 struct process_info_private
119 /* Arch-specific additions. */
120 struct arch_process_info
*arch_private
;
122 /* libthread_db-specific additions. Not NULL if this process has loaded
123 thread_db, and it is active. */
124 struct thread_db
*thread_db
;
126 /* &_r_debug. 0 if not yet determined. -1 if no PT_DYNAMIC in Phdrs. */
132 struct linux_target_ops
134 /* Hook to fetch a register in some non-standard way. Used for
135 example by backends that have read-only registers with hardcoded
136 values (e.g., IA64's gr0/fr0/fr1). Returns true if register
137 REGNO was supplied, false if not, and we should fallback to the
138 standard ptrace methods. */
139 int (*fetch_register
) (struct regcache
*regcache
, int regno
);
141 CORE_ADDR (*get_pc
) (struct regcache
*regcache
);
142 void (*set_pc
) (struct regcache
*regcache
, CORE_ADDR newpc
);
144 /* See target.h for details. */
145 int (*breakpoint_kind_from_pc
) (CORE_ADDR
*pcptr
);
147 /* See target.h for details. */
148 const gdb_byte
*(*sw_breakpoint_from_kind
) (int kind
, int *size
);
150 /* Find the next possible PCs after the current instruction executes. */
151 std::vector
<CORE_ADDR
> (*get_next_pcs
) (struct regcache
*regcache
);
153 int decr_pc_after_break
;
154 int (*breakpoint_at
) (CORE_ADDR pc
);
156 /* Breakpoint and watchpoint related functions. See target.h for
158 int (*supports_z_point_type
) (char z_type
);
159 int (*insert_point
) (enum raw_bkpt_type type
, CORE_ADDR addr
,
160 int size
, struct raw_breakpoint
*bp
);
161 int (*remove_point
) (enum raw_bkpt_type type
, CORE_ADDR addr
,
162 int size
, struct raw_breakpoint
*bp
);
164 int (*stopped_by_watchpoint
) (void);
165 CORE_ADDR (*stopped_data_address
) (void);
167 /* Hooks to reformat register data for PEEKUSR/POKEUSR (in particular
168 for registers smaller than an xfer unit). */
169 void (*collect_ptrace_register
) (struct regcache
*regcache
,
170 int regno
, char *buf
);
171 void (*supply_ptrace_register
) (struct regcache
*regcache
,
172 int regno
, const char *buf
);
174 /* Hook to convert from target format to ptrace format and back.
175 Returns true if any conversion was done; false otherwise.
176 If DIRECTION is 1, then copy from INF to NATIVE.
177 If DIRECTION is 0, copy from NATIVE to INF. */
178 int (*siginfo_fixup
) (siginfo_t
*native
, gdb_byte
*inf
, int direction
);
180 /* Hook to call when a new process is created or attached to.
181 If extra per-process architecture-specific data is needed,
183 struct arch_process_info
* (*new_process
) (void);
185 /* Hook to call when a process is being deleted. If extra per-process
186 architecture-specific data is needed, delete it here. */
187 void (*delete_process
) (struct arch_process_info
*info
);
189 /* Hook to call when a new thread is detected.
190 If extra per-thread architecture-specific data is needed,
192 void (*new_thread
) (struct lwp_info
*);
194 /* Hook to call when a thread is being deleted. If extra per-thread
195 architecture-specific data is needed, delete it here. */
196 void (*delete_thread
) (struct arch_lwp_info
*);
198 /* Hook to call, if any, when a new fork is attached. */
199 void (*new_fork
) (struct process_info
*parent
, struct process_info
*child
);
201 /* Hook to call prior to resuming a thread. */
202 void (*prepare_to_resume
) (struct lwp_info
*);
204 /* Hook to support target specific qSupported. */
205 void (*process_qsupported
) (char **, int count
);
207 /* Returns true if the low target supports tracepoints. */
208 int (*supports_tracepoints
) (void);
210 /* Fill ADDRP with the thread area address of LWPID. Returns 0 on
211 success, -1 on failure. */
212 int (*get_thread_area
) (int lwpid
, CORE_ADDR
*addrp
);
214 /* Install a fast tracepoint jump pad. See target.h for
216 int (*install_fast_tracepoint_jump_pad
) (CORE_ADDR tpoint
, CORE_ADDR tpaddr
,
220 CORE_ADDR
*jump_entry
,
221 CORE_ADDR
*trampoline
,
222 ULONGEST
*trampoline_size
,
223 unsigned char *jjump_pad_insn
,
224 ULONGEST
*jjump_pad_insn_size
,
225 CORE_ADDR
*adjusted_insn_addr
,
226 CORE_ADDR
*adjusted_insn_addr_end
,
229 /* Return the bytecode operations vector for the current inferior.
230 Returns NULL if bytecode compilation is not supported. */
231 struct emit_ops
*(*emit_ops
) (void);
233 /* Return the minimum length of an instruction that can be safely overwritten
234 for use as a fast tracepoint. */
235 int (*get_min_fast_tracepoint_insn_len
) (void);
237 /* Returns true if the low target supports range stepping. */
238 int (*supports_range_stepping
) (void);
241 int (*breakpoint_kind_from_current_state
) (CORE_ADDR
*pcptr
);
244 int (*supports_hardware_single_step
) (void);
246 /* Fill *SYSNO with the syscall nr trapped. Only to be called when
247 inferior is stopped due to SYSCALL_SIGTRAP. */
248 void (*get_syscall_trapinfo
) (struct regcache
*regcache
, int *sysno
);
251 int (*get_ipa_tdesc_idx
) (void);
254 extern struct linux_target_ops the_low_target
;
256 /* Target ops definitions for a Linux target. */
258 class linux_process_target
: public process_stratum_target
262 int create_inferior (const char *program
,
263 const std::vector
<char *> &program_args
) override
;
265 void post_create_inferior () override
;
267 int attach (unsigned long pid
) override
;
269 int kill (process_info
*proc
) override
;
271 int detach (process_info
*proc
) override
;
273 void mourn (process_info
*proc
) override
;
275 void join (int pid
) override
;
277 bool thread_alive (ptid_t pid
) override
;
279 void resume (thread_resume
*resume_info
, size_t n
) override
;
281 ptid_t
wait (ptid_t ptid
, target_waitstatus
*status
,
282 int options
) override
;
284 void fetch_registers (regcache
*regcache
, int regno
) override
;
286 void store_registers (regcache
*regcache
, int regno
) override
;
288 int prepare_to_access_memory () override
;
290 void done_accessing_memory () override
;
292 int read_memory (CORE_ADDR memaddr
, unsigned char *myaddr
,
295 int write_memory (CORE_ADDR memaddr
, const unsigned char *myaddr
,
298 void look_up_symbols () override
;
300 void request_interrupt () override
;
302 bool supports_read_auxv () override
;
304 int read_auxv (CORE_ADDR offset
, unsigned char *myaddr
,
305 unsigned int len
) override
;
307 bool supports_z_point_type (char z_type
) override
;
309 int insert_point (enum raw_bkpt_type type
, CORE_ADDR addr
,
310 int size
, raw_breakpoint
*bp
) override
;
312 int remove_point (enum raw_bkpt_type type
, CORE_ADDR addr
,
313 int size
, raw_breakpoint
*bp
) override
;
315 bool stopped_by_sw_breakpoint () override
;
317 bool supports_stopped_by_sw_breakpoint () override
;
319 bool stopped_by_hw_breakpoint () override
;
321 bool supports_stopped_by_hw_breakpoint () override
;
323 bool supports_hardware_single_step () override
;
325 bool stopped_by_watchpoint () override
;
327 CORE_ADDR
stopped_data_address () override
;
329 bool supports_read_offsets () override
;
331 int read_offsets (CORE_ADDR
*text
, CORE_ADDR
*data
) override
;
333 bool supports_get_tls_address () override
;
335 int get_tls_address (thread_info
*thread
, CORE_ADDR offset
,
336 CORE_ADDR load_module
, CORE_ADDR
*address
) override
;
338 bool supports_qxfer_osdata () override
;
340 int qxfer_osdata (const char *annex
, unsigned char *readbuf
,
341 unsigned const char *writebuf
,
342 CORE_ADDR offset
, int len
) override
;
344 bool supports_qxfer_siginfo () override
;
346 int qxfer_siginfo (const char *annex
, unsigned char *readbuf
,
347 unsigned const char *writebuf
,
348 CORE_ADDR offset
, int len
) override
;
350 bool supports_non_stop () override
;
352 bool async (bool enable
) override
;
354 int start_non_stop (bool enable
) override
;
356 bool supports_multi_process () override
;
358 bool supports_fork_events () override
;
360 bool supports_vfork_events () override
;
362 bool supports_exec_events () override
;
364 void handle_new_gdb_connection () override
;
366 int handle_monitor_command (char *mon
) override
;
368 int core_of_thread (ptid_t ptid
) override
;
370 #if defined PT_GETDSBT || defined PTRACE_GETFDPIC
371 bool supports_read_loadmap () override
;
373 int read_loadmap (const char *annex
, CORE_ADDR offset
,
374 unsigned char *myaddr
, unsigned int len
) override
;
377 void process_qsupported (char **features
, int count
) override
;
379 bool supports_tracepoints () override
;
381 CORE_ADDR
read_pc (regcache
*regcache
) override
;
383 void write_pc (regcache
*regcache
, CORE_ADDR pc
) override
;
385 bool supports_thread_stopped () override
;
387 bool thread_stopped (thread_info
*thread
) override
;
389 void pause_all (bool freeze
) override
;
391 void unpause_all (bool unfreeze
) override
;
393 void stabilize_threads () override
;
395 bool supports_fast_tracepoints () override
;
397 int install_fast_tracepoint_jump_pad (CORE_ADDR tpoint
,
402 CORE_ADDR
*jump_entry
,
403 CORE_ADDR
*trampoline
,
404 ULONGEST
*trampoline_size
,
405 unsigned char *jjump_pad_insn
,
406 ULONGEST
*jjump_pad_insn_size
,
407 CORE_ADDR
*adjusted_insn_addr
,
408 CORE_ADDR
*adjusted_insn_addr_end
,
411 int get_min_fast_tracepoint_insn_len () override
;
413 struct emit_ops
*emit_ops () override
;
415 bool supports_disable_randomization () override
;
417 bool supports_qxfer_libraries_svr4 () override
;
419 int qxfer_libraries_svr4 (const char *annex
,
420 unsigned char *readbuf
,
421 unsigned const char *writebuf
,
422 CORE_ADDR offset
, int len
) override
;
424 bool supports_agent () override
;
426 #ifdef HAVE_LINUX_BTRACE
427 btrace_target_info
*enable_btrace (ptid_t ptid
,
428 const btrace_config
*conf
) override
;
430 int disable_btrace (btrace_target_info
*tinfo
) override
;
432 int read_btrace (btrace_target_info
*tinfo
, buffer
*buf
,
433 enum btrace_read_type type
) override
;
435 int read_btrace_conf (const btrace_target_info
*tinfo
,
436 buffer
*buf
) override
;
439 bool supports_range_stepping () override
;
441 bool supports_pid_to_exec_file () override
;
443 char *pid_to_exec_file (int pid
) override
;
445 bool supports_multifs () override
;
447 int multifs_open (int pid
, const char *filename
, int flags
,
448 mode_t mode
) override
;
450 int multifs_unlink (int pid
, const char *filename
) override
;
452 ssize_t
multifs_readlink (int pid
, const char *filename
, char *buf
,
453 size_t bufsiz
) override
;
455 int breakpoint_kind_from_pc (CORE_ADDR
*pcptr
) override
;
457 const gdb_byte
*sw_breakpoint_from_kind (int kind
, int *size
) override
;
459 int breakpoint_kind_from_current_state (CORE_ADDR
*pcptr
) override
;
461 const char *thread_name (ptid_t thread
) override
;
464 bool thread_handle (ptid_t ptid
, gdb_byte
**handle
,
465 int *handle_len
) override
;
468 bool supports_software_single_step () override
;
470 bool supports_catch_syscall () override
;
472 int get_ipa_tdesc_idx () override
;
474 /* Return the information to access registers. This has public
475 visibility because proc-service uses it. */
476 virtual const regs_info
*get_regs_info () = 0;
480 /* Handle a GNU/Linux extended wait response. If we see a clone,
481 fork, or vfork event, we need to add the new LWP to our list
482 (and return 0 so as not to report the trap to higher layers).
483 If we see an exec event, we will modify ORIG_EVENT_LWP to point
484 to a new LWP representing the new program. */
485 int handle_extended_wait (lwp_info
**orig_event_lwp
, int wstat
);
487 /* Do low-level handling of the event, and check if we should go on
488 and pass it to caller code. Return the affected lwp if we are, or
490 lwp_info
*filter_event (int lwpid
, int wstat
);
492 /* Wait for an event from child(ren) WAIT_PTID, and return any that
493 match FILTER_PTID (leaving others pending). The PTIDs can be:
494 minus_one_ptid, to specify any child; a pid PTID, specifying all
495 lwps of a thread group; or a PTID representing a single lwp. Store
496 the stop status through the status pointer WSTAT. OPTIONS is
497 passed to the waitpid call. Return 0 if no event was found and
498 OPTIONS contains WNOHANG. Return -1 if no unwaited-for children
499 was found. Return the PID of the stopped child otherwise. */
500 int wait_for_event_filtered (ptid_t wait_ptid
, ptid_t filter_ptid
,
501 int *wstatp
, int options
);
503 /* Wait for an event from child(ren) PTID. PTIDs can be:
504 minus_one_ptid, to specify any child; a pid PTID, specifying all
505 lwps of a thread group; or a PTID representing a single lwp. Store
506 the stop status through the status pointer WSTAT. OPTIONS is
507 passed to the waitpid call. Return 0 if no event was found and
508 OPTIONS contains WNOHANG. Return -1 if no unwaited-for children
509 was found. Return the PID of the stopped child otherwise. */
510 int wait_for_event (ptid_t ptid
, int *wstatp
, int options
);
512 /* Wait for all children to stop for the SIGSTOPs we just queued. */
513 void wait_for_sigstop ();
515 /* Wait for process, returns status. */
516 ptid_t
wait_1 (ptid_t ptid
, target_waitstatus
*ourstatus
,
519 /* Stop all lwps that aren't stopped yet, except EXCEPT, if not NULL.
520 If SUSPEND, then also increase the suspend count of every LWP,
522 void stop_all_lwps (int suspend
, lwp_info
*except
);
524 /* Stopped LWPs that the client wanted to be running, that don't have
525 pending statuses, are set to run again, except for EXCEPT, if not
526 NULL. This undoes a stop_all_lwps call. */
527 void unstop_all_lwps (int unsuspend
, lwp_info
*except
);
529 /* Start a step-over operation on LWP. When LWP stopped at a
530 breakpoint, to make progress, we need to remove the breakpoint out
531 of the way. If we let other threads run while we do that, they may
532 pass by the breakpoint location and miss hitting it. To avoid
533 that, a step-over momentarily stops all threads while LWP is
534 single-stepped by either hardware or software while the breakpoint
535 is temporarily uninserted from the inferior. When the single-step
536 finishes, we reinsert the breakpoint, and let all threads that are
537 supposed to be running, run again. */
538 void start_step_over (lwp_info
*lwp
);
540 /* If there's a step over in progress, wait until all threads stop
541 (that is, until the stepping thread finishes its step), and
542 unsuspend all lwps. The stepping thread ends with its status
543 pending, which is processed later when we get back to processing
545 void complete_ongoing_step_over ();
547 /* When we finish a step-over, set threads running again. If there's
548 another thread that may need a step-over, now's the time to start
549 it. Eventually, we'll move all threads past their breakpoints. */
550 void proceed_all_lwps ();
552 /* The reason we resume in the caller, is because we want to be able
553 to pass lwp->status_pending as WSTAT, and we need to clear
554 status_pending_p before resuming, otherwise, resume_one_lwp
555 refuses to resume. */
556 bool maybe_move_out_of_jump_pad (lwp_info
*lwp
, int *wstat
);
558 /* Move THREAD out of the jump pad. */
559 void move_out_of_jump_pad (thread_info
*thread
);
561 /* Call low_arch_setup on THREAD. */
562 void arch_setup_thread (thread_info
*thread
);
564 #ifdef HAVE_LINUX_USRREGS
565 /* Fetch one register. */
566 void fetch_register (const usrregs_info
*usrregs
, regcache
*regcache
,
569 /* Store one register. */
570 void store_register (const usrregs_info
*usrregs
, regcache
*regcache
,
574 /* Fetch all registers, or just one, from the child process.
575 If REGNO is -1, do this for all registers, skipping any that are
576 assumed to have been retrieved by regsets_fetch_inferior_registers,
577 unless ALL is non-zero.
578 Otherwise, REGNO specifies which register (so we can save time). */
579 void usr_fetch_inferior_registers (const regs_info
*regs_info
,
580 regcache
*regcache
, int regno
, int all
);
582 /* Store our register values back into the inferior.
583 If REGNO is -1, do this for all registers, skipping any that are
584 assumed to have been saved by regsets_store_inferior_registers,
585 unless ALL is non-zero.
586 Otherwise, REGNO specifies which register (so we can save time). */
587 void usr_store_inferior_registers (const regs_info
*regs_info
,
588 regcache
*regcache
, int regno
, int all
);
591 /* The architecture-specific "low" methods are listed below. */
593 /* Architecture-specific setup for the current thread. */
594 virtual void low_arch_setup () = 0;
596 /* Return false if we can fetch/store the register, true if we cannot
597 fetch/store the register. */
598 virtual bool low_cannot_fetch_register (int regno
) = 0;
600 virtual bool low_cannot_store_register (int regno
) = 0;
603 extern linux_process_target
*the_linux_target
;
605 #define get_thread_lwp(thr) ((struct lwp_info *) (thread_target_data (thr)))
606 #define get_lwp_thread(lwp) ((lwp)->thread)
608 /* This struct is recorded in the target_data field of struct thread_info.
610 On linux ``all_threads'' is keyed by the LWP ID, which we use as the
611 GDB protocol representation of the thread ID. Threads also have
612 a "process ID" (poorly named) which is (presently) the same as the
615 There is also ``all_processes'' is keyed by the "overall process ID",
616 which GNU/Linux calls tgid, "thread group ID". */
620 /* Backlink to the parent object. */
621 struct thread_info
*thread
;
623 /* If this flag is set, the next SIGSTOP will be ignored (the
624 process will be immediately resumed). This means that either we
625 sent the SIGSTOP to it ourselves and got some other pending event
626 (so the SIGSTOP is still pending), or that we stopped the
627 inferior implicitly via PTRACE_ATTACH and have not waited for it
631 /* When this is true, we shall not try to resume this thread, even
632 if last_resume_kind isn't resume_stop. */
635 /* If this flag is set, the lwp is known to be stopped right now (stop
636 event already received in a wait()). */
639 /* Signal whether we are in a SYSCALL_ENTRY or
640 in a SYSCALL_RETURN event.
642 - TARGET_WAITKIND_SYSCALL_ENTRY
643 - TARGET_WAITKIND_SYSCALL_RETURN */
644 enum target_waitkind syscall_state
;
646 /* When stopped is set, the last wait status recorded for this lwp. */
649 /* If WAITSTATUS->KIND != TARGET_WAITKIND_IGNORE, the waitstatus for
650 this LWP's last event, to pass to GDB without any further
651 processing. This is used to store extended ptrace event
652 information or exit status until it can be reported to GDB. */
653 struct target_waitstatus waitstatus
;
655 /* A pointer to the fork child/parent relative. Valid only while
656 the parent fork event is not reported to higher layers. Used to
657 avoid wildcard vCont actions resuming a fork child before GDB is
658 notified about the parent's fork event. */
659 struct lwp_info
*fork_relative
;
661 /* When stopped is set, this is where the lwp last stopped, with
662 decr_pc_after_break already accounted for. If the LWP is
663 running, this is the address at which the lwp was resumed. */
666 /* If this flag is set, STATUS_PENDING is a waitstatus that has not yet
668 int status_pending_p
;
671 /* The reason the LWP last stopped, if we need to track it
672 (breakpoint, watchpoint, etc.) */
673 enum target_stop_reason stop_reason
;
675 /* On architectures where it is possible to know the data address of
676 a triggered watchpoint, STOPPED_DATA_ADDRESS is non-zero, and
677 contains such data address. Only valid if STOPPED_BY_WATCHPOINT
679 CORE_ADDR stopped_data_address
;
681 /* If this is non-zero, it is a breakpoint to be reinserted at our next
682 stop (SIGTRAP stops only). */
683 CORE_ADDR bp_reinsert
;
685 /* If this flag is set, the last continue operation at the ptrace
686 level on this process was a single-step. */
689 /* Range to single step within. This is a copy of the step range
690 passed along the last resume request. See 'struct
692 CORE_ADDR step_range_start
; /* Inclusive */
693 CORE_ADDR step_range_end
; /* Exclusive */
695 /* If this flag is set, we need to set the event request flags the
696 next time we see this LWP stop. */
697 int must_set_ptrace_flags
;
699 /* If this is non-zero, it points to a chain of signals which need to
700 be delivered to this process. */
701 struct pending_signals
*pending_signals
;
703 /* A link used when resuming. It is initialized from the resume request,
704 and then processed and cleared in linux_resume_one_lwp. */
705 struct thread_resume
*resume
;
707 /* Information bout this lwp's fast tracepoint collection status (is it
708 currently stopped in the jump pad, and if so, before or at/after the
709 relocated instruction). Normally, we won't care about this, but we will
710 if a signal arrives to this lwp while it is collecting. */
711 fast_tpoint_collect_result collecting_fast_tracepoint
;
713 /* If this is non-zero, it points to a chain of signals which need
714 to be reported to GDB. These were deferred because the thread
715 was doing a fast tracepoint collect when they arrived. */
716 struct pending_signals
*pending_signals_to_report
;
718 /* When collecting_fast_tracepoint is first found to be 1, we insert
719 a exit-jump-pad-quickly breakpoint. This is it. */
720 struct breakpoint
*exit_jump_pad_bkpt
;
724 /* The thread handle, used for e.g. TLS access. Only valid if
725 THREAD_KNOWN is set. */
728 /* The pthread_t handle. */
729 thread_t thread_handle
;
732 /* Arch-specific additions. */
733 struct arch_lwp_info
*arch_private
;
736 int linux_pid_exe_is_elf_64_file (int pid
, unsigned int *machine
);
738 /* Attach to PTID. Returns 0 on success, non-zero otherwise (an
740 int linux_attach_lwp (ptid_t ptid
);
742 struct lwp_info
*find_lwp_pid (ptid_t ptid
);
743 /* For linux_stop_lwp see nat/linux-nat.h. */
745 #ifdef HAVE_LINUX_REGSETS
746 void initialize_regsets_info (struct regsets_info
*regsets_info
);
749 void initialize_low_arch (void);
751 void linux_set_pc_32bit (struct regcache
*regcache
, CORE_ADDR pc
);
752 CORE_ADDR
linux_get_pc_32bit (struct regcache
*regcache
);
754 void linux_set_pc_64bit (struct regcache
*regcache
, CORE_ADDR pc
);
755 CORE_ADDR
linux_get_pc_64bit (struct regcache
*regcache
);
757 /* From thread-db.c */
758 int thread_db_init (void);
759 void thread_db_detach (struct process_info
*);
760 void thread_db_mourn (struct process_info
*);
761 int thread_db_handle_monitor_command (char *);
762 int thread_db_get_tls_address (struct thread_info
*thread
, CORE_ADDR offset
,
763 CORE_ADDR load_module
, CORE_ADDR
*address
);
764 int thread_db_look_up_one_symbol (const char *name
, CORE_ADDR
*addrp
);
766 /* Called from linux-low.c when a clone event is detected. Upon entry,
767 both the clone and the parent should be stopped. This function does
768 whatever is required have the clone under thread_db's control. */
770 void thread_db_notice_clone (struct thread_info
*parent_thr
, ptid_t child_ptid
);
772 bool thread_db_thread_handle (ptid_t ptid
, gdb_byte
**handle
, int *handle_len
);
774 extern int have_ptrace_getregset
;
776 /* Search for the value with type MATCH in the auxv vector with
777 entries of length WORDSIZE bytes. If found, store the value in
778 *VALP and return 1. If not found or if there is an error, return
781 int linux_get_auxv (int wordsize
, CORE_ADDR match
,
784 /* Fetch the AT_HWCAP entry from the auxv vector, where entries are length
785 WORDSIZE. If no entry was found, return zero. */
787 CORE_ADDR
linux_get_hwcap (int wordsize
);
789 /* Fetch the AT_HWCAP2 entry from the auxv vector, where entries are length
790 WORDSIZE. If no entry was found, return zero. */
792 CORE_ADDR
linux_get_hwcap2 (int wordsize
);
794 #endif /* GDBSERVER_LINUX_LOW_H */