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binutils-gdb/gdb/fbsd-tdep.c
Pedro Alves 5b6d1e4fa4 Multi-target support 
This commit adds multi-target support to GDB.  What this means is that
with this commit, GDB can now be connected to different targets at the
same time.  E.g., you can debug a live native process and a core dump
at the same time, connect to multiple gdbservers, etc.

Actually, the word "target" is overloaded in gdb.  We already have a
target stack, with pushes several target_ops instances on top of one
another.  We also have "info target" already, which means something
completely different to what this patch does.

So from here on, I'll be using the "target connections" term, to mean
an open process_stratum target, pushed on a target stack.  This patch
makes gdb have multiple target stacks, and multiple process_stratum
targets open simultaneously.  The user-visible changes / commands will
also use this terminology, but of course it's all open to debate.

User-interface-wise, not that much changes.  The main difference is
that each inferior may have its own target connection.

A target connection (e.g., a target extended-remote connection) may
support debugging multiple processes, just as before.

Say you're debugging against gdbserver in extended-remote mode, and
you do "add-inferior" to prepare to spawn a new process, like:

 (gdb) target extended-remote :9999
 ...
 (gdb) start
 ...
 (gdb) add-inferior
 Added inferior 2
 (gdb) inferior 2
 [Switching to inferior 2 [<null>] (<noexec>)]
 (gdb) file a.out
 ...
 (gdb) start
 ...

At this point, you have two inferiors connected to the same gdbserver.

With this commit, GDB will maintain a target stack per inferior,
instead of a global target stack.

To preserve the behavior above, by default, "add-inferior" makes the
new inferior inherit a copy of the target stack of the current
inferior.  Same across a fork - the child inherits a copy of the
target stack of the parent.  While the target stacks are copied, the
targets themselves are not.  Instead, target_ops is made a
refcounted_object, which means that target_ops instances are
refcounted, which each inferior counting for a reference.

What if you want to create an inferior and connect it to some _other_
target?  For that, this commit introduces a new "add-inferior
-no-connection" option that makes the new inferior not share the
current inferior's target.  So you could do:

 (gdb) target extended-remote :9999
 Remote debugging using :9999
 ...
 (gdb) add-inferior -no-connection
 [New inferior 2]
 Added inferior 2
 (gdb) inferior 2
 [Switching to inferior 2 [<null>] (<noexec>)]
 (gdb) info inferiors
   Num  Description       Executable
   1    process 18401     target:/home/pedro/tmp/main
 * 2    <null>
 (gdb) tar extended-remote :10000
 Remote debugging using :10000
 ...
 (gdb) info inferiors
   Num  Description       Executable
   1    process 18401     target:/home/pedro/tmp/main
 * 2    process 18450     target:/home/pedro/tmp/main
 (gdb)

A following patch will extended "info inferiors" to include a column
indicating which connection an inferior is bound to, along with a
couple other UI tweaks.

Other than that, debugging is the same as before.  Users interact with
inferiors and threads as before.  The only difference is that
inferiors may be bound to processes running in different machines.

That's pretty much all there is to it in terms of noticeable UI
changes.

On to implementation.

Since we can be connected to different systems at the same time, a
ptid_t is no longer a unique identifier.  Instead a thread can be
identified by a pair of ptid_t and 'process_stratum_target *', the
later being the instance of the process_stratum target that owns the
process/thread.  Note that process_stratum_target inherits from
target_ops, and all process_stratum targets inherit from
process_stratum_target.  In earlier patches, many places in gdb were
converted to refer to threads by thread_info pointer instead of
ptid_t, but there are still places in gdb where we start with a
pid/tid and need to find the corresponding inferior or thread_info
objects.  So you'll see in the patch many places adding a
process_stratum_target parameter to functions that used to take only a
ptid_t.

Since each inferior has its own target stack now, we can always find
the process_stratum target for an inferior.  That is done via a
inf->process_target() convenience method.

Since each inferior has its own target stack, we need to handle the
"beneath" calls when servicing target calls.  The solution I settled
with is just to make sure to switch the current inferior to the
inferior you want before making a target call.  Not relying on global
context is just not feasible in current GDB.  Fortunately, there
aren't that many places that need to do that, because generally most
code that calls target methods already has the current context
pointing to the right inferior/thread.  Note, to emphasize -- there's
no method to "switch to this target stack".  Instead, you switch the
current inferior, and that implicitly switches the target stack.

In some spots, we need to iterate over all inferiors so that we reach
all target stacks.

Native targets are still singletons.  There's always only a single
instance of such targets.

Remote targets however, we'll have one instance per remote connection.

The exec target is still a singleton.  There's only one instance.  I
did not see the point of instanciating more than one exec_target
object.

After vfork, we need to make sure to push the exec target on the new
inferior.  See exec_on_vfork.

For type safety, functions that need a {target, ptid} pair to identify
a thread, take a process_stratum_target pointer for target parameter
instead of target_ops *.  Some shared code in gdb/nat/ also need to
gain a target pointer parameter.  This poses an issue, since gdbserver
doesn't have process_stratum_target, only target_ops.  To fix this,
this commit renames gdbserver's target_ops to process_stratum_target.
I think this makes sense.  There's no concept of target stack in
gdbserver, and gdbserver's target_ops really implements a
process_stratum-like target.

The thread and inferior iterator functions also gain
process_stratum_target parameters.  These are used to be able to
iterate over threads and inferiors of a given target.  Following usual
conventions, if the target pointer is null, then we iterate over
threads and inferiors of all targets.

I tried converting "add-inferior" to the gdb::option framework, as a
preparatory patch, but that stumbled on the fact that gdb::option does
not support file options yet, for "add-inferior -exec".  I have a WIP
patchset that adds that, but it's not a trivial patch, mainly due to
need to integrate readline's filename completion, so I deferred that
to some other time.

In infrun.c/infcmd.c, the main change is that we need to poll events
out of all targets.  See do_target_wait.  Right after collecting an
event, we switch the current inferior to an inferior bound to the
target that reported the event, so that target methods can be used
while handling the event.  This makes most of the code transparent to
multi-targets.  See fetch_inferior_event.

infrun.c:stop_all_threads is interesting -- in this function we need
to stop all threads of all targets.  What the function does is send an
asynchronous stop request to all threads, and then synchronously waits
for events, with target_wait, rinse repeat, until all it finds are
stopped threads.  Now that we have multiple targets, it's not
efficient to synchronously block in target_wait waiting for events out
of one target.  Instead, we implement a mini event loop, with
interruptible_select, select'ing on one file descriptor per target.
For this to work, we need to be able to ask the target for a waitable
file descriptor.  Such file descriptors already exist, they are the
descriptors registered in the main event loop with add_file_handler,
inside the target_async implementations.  This commit adds a new
target_async_wait_fd target method that just returns the file
descriptor in question.  See wait_one / stop_all_threads in infrun.c.

The 'threads_executing' global is made a per-target variable.  Since
it is only relevant to process_stratum_target targets, this is where
it is put, instead of in target_ops.

You'll notice that remote.c includes some FIXME notes.  These refer to
the fact that the global arrays that hold data for the remote packets
supported are still globals.  For example, if we connect to two
different servers/stubs, then each might support different remote
protocol features.  They might even be different architectures, like
e.g., one ARM baremetal stub, and a x86 gdbserver, to debug a
host/controller scenario as a single program.  That isn't going to
work correctly today, because of said globals.  I'm leaving fixing
that for another pass, since it does not appear to be trivial, and I'd
rather land the base work first.  It's already useful to be able to
debug multiple instances of the same server (e.g., a distributed
cluster, where you have full control over the servers installed), so I
think as is it's already reasonable incremental progress.

Current limitations:

 - You can only resume more that one target at the same time if all
   targets support asynchronous debugging, and support non-stop mode.
   It should be possible to support mixed all-stop + non-stop
   backends, but that is left for another time.  This means that
   currently in order to do multi-target with gdbserver you need to
   issue "maint set target-non-stop on".  I would like to make that
   mode be the default, but we're not there yet.  Note that I'm
   talking about how the target backend works, only.  User-visible
   all-stop mode works just fine.

 - As explained above, connecting to different remote servers at the
   same time is likely to produce bad results if they don't support the
   exact set of RSP features.

FreeBSD updates courtesy of John Baldwin.

gdb/ChangeLog:
2020-01-10  Pedro Alves  <palves@redhat.com>
	    John Baldwin  <jhb@FreeBSD.org>

	* aarch64-linux-nat.c
	(aarch64_linux_nat_target::thread_architecture): Adjust.
	* ada-tasks.c (print_ada_task_info): Adjust find_thread_ptid call.
	(task_command_1): Likewise.
	* aix-thread.c (sync_threadlists, aix_thread_target::resume)
	(aix_thread_target::wait, aix_thread_target::fetch_registers)
	(aix_thread_target::store_registers)
	(aix_thread_target::thread_alive): Adjust.
	* amd64-fbsd-tdep.c: Include "inferior.h".
	(amd64fbsd_get_thread_local_address): Pass down target.
	* amd64-linux-nat.c (ps_get_thread_area): Use ps_prochandle
	thread's gdbarch instead of target_gdbarch.
	* break-catch-sig.c (signal_catchpoint_print_it): Adjust call to
	get_last_target_status.
	* break-catch-syscall.c (print_it_catch_syscall): Likewise.
	* breakpoint.c (breakpoints_should_be_inserted_now): Consider all
	inferiors.
	(update_inserted_breakpoint_locations): Skip if inferiors with no
	execution.
	(update_global_location_list): When handling moribund locations,
	find representative inferior for location's pspace, and use thread
	count of its process_stratum target.
	* bsd-kvm.c (bsd_kvm_target_open): Pass target down.
	* bsd-uthread.c (bsd_uthread_target::wait): Use
	as_process_stratum_target and adjust thread_change_ptid and
	add_thread calls.
	(bsd_uthread_target::update_thread_list): Use
	as_process_stratum_target and adjust find_thread_ptid,
	thread_change_ptid and add_thread calls.
	* btrace.c (maint_btrace_packet_history_cmd): Adjust
	find_thread_ptid call.
	* corelow.c (add_to_thread_list): Adjust add_thread call.
	(core_target_open): Adjust add_thread_silent and thread_count
	calls.
	(core_target::pid_to_str): Adjust find_inferior_ptid call.
	* ctf.c (ctf_target_open): Adjust add_thread_silent call.
	* event-top.c (async_disconnect): Pop targets from all inferiors.
	* exec.c (add_target_sections): Push exec target on all inferiors
	sharing the program space.
	(remove_target_sections): Remove the exec target from all
	inferiors sharing the program space.
	(exec_on_vfork): New.
	* exec.h (exec_on_vfork): Declare.
	* fbsd-nat.c (fbsd_add_threads): Add fbsd_nat_target parameter.
	Pass it down.
	(fbsd_nat_target::update_thread_list): Adjust.
	(fbsd_nat_target::resume): Adjust.
	(fbsd_handle_debug_trap): Add fbsd_nat_target parameter.  Pass it
	down.
	(fbsd_nat_target::wait, fbsd_nat_target::post_attach): Adjust.
	* fbsd-tdep.c (fbsd_corefile_thread): Adjust
	get_thread_arch_regcache call.
	* fork-child.c (gdb_startup_inferior): Pass target down to
	startup_inferior and set_executing.
	* gdbthread.h (struct process_stratum_target): Forward declare.
	(add_thread, add_thread_silent, add_thread_with_info)
	(in_thread_list): Add process_stratum_target parameter.
	(find_thread_ptid(inferior*, ptid_t)): New overload.
	(find_thread_ptid, thread_change_ptid): Add process_stratum_target
	parameter.
	(all_threads()): Delete overload.
	(all_threads, all_non_exited_threads): Add process_stratum_target
	parameter.
	(all_threads_safe): Use brace initialization.
	(thread_count): Add process_stratum_target parameter.
	(set_resumed, set_running, set_stop_requested, set_executing)
	(threads_are_executing, finish_thread_state): Add
	process_stratum_target parameter.
	(switch_to_thread): Use is_current_thread.
	* i386-fbsd-tdep.c: Include "inferior.h".
	(i386fbsd_get_thread_local_address): Pass down target.
	* i386-linux-nat.c (i386_linux_nat_target::low_resume): Adjust.
	* inf-child.c (inf_child_target::maybe_unpush_target): Remove
	have_inferiors check.
	* inf-ptrace.c (inf_ptrace_target::create_inferior)
	(inf_ptrace_target::attach): Adjust.
	* infcall.c (run_inferior_call): Adjust.
	* infcmd.c (run_command_1): Pass target to
	scoped_finish_thread_state.
	(proceed_thread_callback): Skip inferiors with no execution.
	(continue_command): Rename 'all_threads' local to avoid hiding
	'all_threads' function.  Adjust get_last_target_status call.
	(prepare_one_step): Adjust set_running call.
	(signal_command): Use user_visible_resume_target.  Compare thread
	pointers instead of inferior_ptid.
	(info_program_command): Adjust to pass down target.
	(attach_command): Mark target's 'thread_executing' flag.
	(stop_current_target_threads_ns): New, factored out from ...
	(interrupt_target_1): ... this.  Switch inferior before making
	target calls.
	* inferior-iter.h
	(struct all_inferiors_iterator, struct all_inferiors_range)
	(struct all_inferiors_safe_range)
	(struct all_non_exited_inferiors_range): Filter on
	process_stratum_target too.  Remove explicit.
	* inferior.c (inferior::inferior): Push dummy target on target
	stack.
	(find_inferior_pid, find_inferior_ptid, number_of_live_inferiors):
	Add process_stratum_target parameter, and pass it down.
	(have_live_inferiors): Adjust.
	(switch_to_inferior_and_push_target): New.
	(add_inferior_command, clone_inferior_command): Handle
	"-no-connection" parameter.  Use
	switch_to_inferior_and_push_target.
	(_initialize_inferior): Mention "-no-connection" option in
	the help of "add-inferior" and "clone-inferior" commands.
	* inferior.h: Include "process-stratum-target.h".
	(interrupt_target_1): Use bool.
	(struct inferior) <push_target, unpush_target, target_is_pushed,
	find_target_beneath, top_target, process_target, target_at,
	m_stack>: New.
	(discard_all_inferiors): Delete.
	(find_inferior_pid, find_inferior_ptid, number_of_live_inferiors)
	(all_inferiors, all_non_exited_inferiors): Add
	process_stratum_target parameter.
	* infrun.c: Include "gdb_select.h" and <unordered_map>.
	(target_last_proc_target): New global.
	(follow_fork_inferior): Push target on new inferior.  Pass target
	to add_thread_silent.  Call exec_on_vfork.  Handle target's
	reference count.
	(follow_fork): Adjust get_last_target_status call.  Also consider
	target.
	(follow_exec): Push target on new inferior.
	(struct execution_control_state) <target>: New field.
	(user_visible_resume_target): New.
	(do_target_resume): Call target_async.
	(resume_1): Set target's threads_executing flag.  Consider resume
	target.
	(commit_resume_all_targets): New.
	(proceed): Also consider resume target.  Skip threads of inferiors
	with no execution.  Commit resumtion in all targets.
	(start_remote): Pass current inferior to wait_for_inferior.
	(infrun_thread_stop_requested): Consider target as well.  Pass
	thread_info pointer to clear_inline_frame_state instead of ptid.
	(infrun_thread_thread_exit): Consider target as well.
	(random_pending_event_thread): New inferior parameter.  Use it.
	(do_target_wait): Rename to ...
	(do_target_wait_1): ... this.  Add inferior parameter, and pass it
	down.
	(threads_are_resumed_pending_p, do_target_wait): New.
	(prepare_for_detach): Adjust calls.
	(wait_for_inferior): New inferior parameter.  Handle it.  Use
	do_target_wait_1 instead of do_target_wait.
	(fetch_inferior_event): Adjust.  Switch to representative
	inferior.  Pass target down.
	(set_last_target_status): Add process_stratum_target parameter.
	Save target in global.
	(get_last_target_status): Add process_stratum_target parameter and
	handle it.
	(nullify_last_target_wait_ptid): Clear 'target_last_proc_target'.
	(context_switch): Check inferior_ptid == null_ptid before calling
	inferior_thread().
	(get_inferior_stop_soon): Pass down target.
	(wait_one): Rename to ...
	(poll_one_curr_target): ... this.
	(struct wait_one_event): New.
	(wait_one): New.
	(stop_all_threads): Adjust.
	(handle_no_resumed, handle_inferior_event): Adjust to consider the
	event's target.
	(switch_back_to_stepped_thread): Also consider target.
	(print_stop_event): Update.
	(normal_stop): Update.  Also consider the resume target.
	* infrun.h (wait_for_inferior): Remove declaration.
	(user_visible_resume_target): New declaration.
	(get_last_target_status, set_last_target_status): New
	process_stratum_target parameter.
	* inline-frame.c (clear_inline_frame_state(ptid_t)): Add
	process_stratum_target parameter, and use it.
	(clear_inline_frame_state (thread_info*)): New.
	* inline-frame.c (clear_inline_frame_state(ptid_t)): Add
	process_stratum_target parameter.
	(clear_inline_frame_state (thread_info*)): Declare.
	* linux-fork.c (delete_checkpoint_command): Pass target down to
	find_thread_ptid.
	(checkpoint_command): Adjust.
	* linux-nat.c (linux_nat_target::follow_fork): Switch to thread
	instead of just tweaking inferior_ptid.
	(linux_nat_switch_fork): Pass target down to thread_change_ptid.
	(exit_lwp): Pass target down to find_thread_ptid.
	(attach_proc_task_lwp_callback): Pass target down to
	add_thread/set_running/set_executing.
	(linux_nat_target::attach): Pass target down to
	thread_change_ptid.
	(get_detach_signal): Pass target down to find_thread_ptid.
	Consider last target status's target.
	(linux_resume_one_lwp_throw, resume_lwp)
	(linux_handle_syscall_trap, linux_handle_extended_wait, wait_lwp)
	(stop_wait_callback, save_stop_reason, linux_nat_filter_event)
	(linux_nat_wait_1, resume_stopped_resumed_lwps): Pass target down.
	(linux_nat_target::async_wait_fd): New.
	(linux_nat_stop_lwp, linux_nat_target::thread_address_space): Pass
	target down.
	* linux-nat.h (linux_nat_target::async_wait_fd): Declare.
	* linux-tdep.c (get_thread_arch_regcache): Pass target down.
	* linux-thread-db.c (struct thread_db_info::process_target): New
	field.
	(add_thread_db_info): Save target.
	(get_thread_db_info): New process_stratum_target parameter.  Also
	match target.
	(delete_thread_db_info): New process_stratum_target parameter.
	Also match target.
	(thread_from_lwp): Adjust to pass down target.
	(thread_db_notice_clone): Pass down target.
	(check_thread_db_callback): Pass down target.
	(try_thread_db_load_1): Always push the thread_db target.
	(try_thread_db_load, record_thread): Pass target down.
	(thread_db_target::detach): Pass target down.  Always unpush the
	thread_db target.
	(thread_db_target::wait, thread_db_target::mourn_inferior): Pass
	target down.  Always unpush the thread_db target.
	(find_new_threads_callback, thread_db_find_new_threads_2)
	(thread_db_target::update_thread_list): Pass target down.
	(thread_db_target::pid_to_str): Pass current inferior down.
	(thread_db_target::get_thread_local_address): Pass target down.
	(thread_db_target::resume, maintenance_check_libthread_db): Pass
	target down.
	* nto-procfs.c (nto_procfs_target::update_thread_list): Adjust.
	* procfs.c (procfs_target::procfs_init_inferior): Declare.
	(proc_set_current_signal, do_attach, procfs_target::wait): Adjust.
	(procfs_init_inferior): Rename to ...
	(procfs_target::procfs_init_inferior): ... this and adjust.
	(procfs_target::create_inferior, procfs_notice_thread)
	(procfs_do_thread_registers): Adjust.
	* ppc-fbsd-tdep.c: Include "inferior.h".
	(ppcfbsd_get_thread_local_address): Pass down target.
	* proc-service.c (ps_xfer_memory): Switch current inferior and
	program space as well.
	(get_ps_regcache): Pass target down.
	* process-stratum-target.c
	(process_stratum_target::thread_address_space)
	(process_stratum_target::thread_architecture): Pass target down.
	* process-stratum-target.h
	(process_stratum_target::threads_executing): New field.
	(as_process_stratum_target): New.
	* ravenscar-thread.c
	(ravenscar_thread_target::update_inferior_ptid): Pass target down.
	(ravenscar_thread_target::wait, ravenscar_add_thread): Pass target
	down.
	* record-btrace.c (record_btrace_target::info_record): Adjust.
	(record_btrace_target::record_method)
	(record_btrace_target::record_is_replaying)
	(record_btrace_target::fetch_registers)
	(get_thread_current_frame_id, record_btrace_target::resume)
	(record_btrace_target::wait, record_btrace_target::stop): Pass
	target down.
	* record-full.c (record_full_wait_1): Switch to event thread.
	Pass target down.
	* regcache.c (regcache::regcache)
	(get_thread_arch_aspace_regcache, get_thread_arch_regcache): Add
	process_stratum_target parameter and handle it.
	(current_thread_target): New global.
	(get_thread_regcache): Add process_stratum_target parameter and
	handle it.  Switch inferior before calling target method.
	(get_thread_regcache): Pass target down.
	(get_thread_regcache_for_ptid): Pass target down.
	(registers_changed_ptid): Add process_stratum_target parameter and
	handle it.
	(registers_changed_thread, registers_changed): Pass target down.
	(test_get_thread_arch_aspace_regcache): New.
	(current_regcache_test): Define a couple local test_target_ops
	instances and use them for testing.
	(readwrite_regcache): Pass process_stratum_target parameter.
	(cooked_read_test, cooked_write_test): Pass mock_target down.
	* regcache.h (get_thread_regcache, get_thread_arch_regcache)
	(get_thread_arch_aspace_regcache): Add process_stratum_target
	parameter.
	(regcache::target): New method.
	(regcache::regcache, regcache::get_thread_arch_aspace_regcache)
	(regcache::registers_changed_ptid): Add process_stratum_target
	parameter.
	(regcache::m_target): New field.
	(registers_changed_ptid): Add process_stratum_target parameter.
	* remote.c (remote_state::supports_vCont_probed): New field.
	(remote_target::async_wait_fd): New method.
	(remote_unpush_and_throw): Add remote_target parameter.
	(get_current_remote_target): Adjust.
	(remote_target::remote_add_inferior): Push target.
	(remote_target::remote_add_thread)
	(remote_target::remote_notice_new_inferior)
	(get_remote_thread_info): Pass target down.
	(remote_target::update_thread_list): Skip threads of inferiors
	bound to other targets.  (remote_target::close): Don't discard
	inferiors.  (remote_target::add_current_inferior_and_thread)
	(remote_target::process_initial_stop_replies)
	(remote_target::start_remote)
	(remote_target::remote_serial_quit_handler): Pass down target.
	(remote_target::remote_unpush_target): New remote_target
	parameter.  Unpush the target from all inferiors.
	(remote_target::remote_unpush_and_throw): New remote_target
	parameter.  Pass it down.
	(remote_target::open_1): Check whether the current inferior has
	execution instead of checking whether any inferior is live.  Pass
	target down.
	(remote_target::remote_detach_1): Pass down target.  Use
	remote_unpush_target.
	(extended_remote_target::attach): Pass down target.
	(remote_target::remote_vcont_probe): Set supports_vCont_probed.
	(remote_target::append_resumption): Pass down target.
	(remote_target::append_pending_thread_resumptions)
	(remote_target::remote_resume_with_hc, remote_target::resume)
	(remote_target::commit_resume): Pass down target.
	(remote_target::remote_stop_ns): Check supports_vCont_probed.
	(remote_target::interrupt_query)
	(remote_target::remove_new_fork_children)
	(remote_target::check_pending_events_prevent_wildcard_vcont)
	(remote_target::remote_parse_stop_reply)
	(remote_target::process_stop_reply): Pass down target.
	(first_remote_resumed_thread): New remote_target parameter.  Pass
	it down.
	(remote_target::wait_as): Pass down target.
	(unpush_and_perror): New remote_target parameter.  Pass it down.
	(remote_target::readchar, remote_target::remote_serial_write)
	(remote_target::getpkt_or_notif_sane_1)
	(remote_target::kill_new_fork_children, remote_target::kill): Pass
	down target.
	(remote_target::mourn_inferior): Pass down target.  Use
	remote_unpush_target.
	(remote_target::core_of_thread)
	(remote_target::remote_btrace_maybe_reopen): Pass down target.
	(remote_target::pid_to_exec_file)
	(remote_target::thread_handle_to_thread_info): Pass down target.
	(remote_target::async_wait_fd): New.
	* riscv-fbsd-tdep.c: Include "inferior.h".
	(riscv_fbsd_get_thread_local_address): Pass down target.
	* sol2-tdep.c (sol2_core_pid_to_str): Pass down target.
	* sol-thread.c (sol_thread_target::wait, ps_lgetregs, ps_lsetregs)
	(ps_lgetfpregs, ps_lsetfpregs, sol_update_thread_list_callback):
	Adjust.
	* solib-spu.c (spu_skip_standalone_loader): Pass down target.
	* solib-svr4.c (enable_break): Pass down target.
	* spu-multiarch.c (parse_spufs_run): Pass down target.
	* spu-tdep.c (spu2ppu_sniffer): Pass down target.
	* target-delegates.c: Regenerate.
	* target.c (g_target_stack): Delete.
	(current_top_target): Return the current inferior's top target.
	(target_has_execution_1): Refer to the passed-in inferior's top
	target.
	(target_supports_terminal_ours): Check whether the initial
	inferior was already created.
	(decref_target): New.
	(target_stack::push): Incref/decref the target.
	(push_target, push_target, unpush_target): Adjust.
	(target_stack::unpush): Defref target.
	(target_is_pushed): Return bool.  Adjust to refer to the current
	inferior's target stack.
	(dispose_inferior): Delete, and inline parts ...
	(target_preopen): ... here.  Only dispose of the current inferior.
	(target_detach): Hold strong target reference while detaching.
	Pass target down.
	(target_thread_name): Add assertion.
	(target_resume): Pass down target.
	(target_ops::beneath, find_target_at): Adjust to refer to the
	current inferior's target stack.
	(get_dummy_target): New.
	(target_pass_ctrlc): Pass the Ctrl-C to the first inferior that
	has a thread running.
	(initialize_targets): Rename to ...
	(_initialize_target): ... this.
	* target.h: Include "gdbsupport/refcounted-object.h".
	(struct target_ops): Inherit refcounted_object.
	(target_ops::shortname, target_ops::longname): Make const.
	(target_ops::async_wait_fd): New method.
	(decref_target): Declare.
	(struct target_ops_ref_policy): New.
	(target_ops_ref): New typedef.
	(get_dummy_target): Declare function.
	(target_is_pushed): Return bool.
	* thread-iter.c (all_matching_threads_iterator::m_inf_matches)
	(all_matching_threads_iterator::all_matching_threads_iterator):
	Handle filter target.
	* thread-iter.h (struct all_matching_threads_iterator, struct
	all_matching_threads_range, class all_non_exited_threads_range):
	Filter by target too.  Remove explicit.
	* thread.c (threads_executing): Delete.
	(inferior_thread): Pass down current inferior.
	(clear_thread_inferior_resources): Pass down thread pointer
	instead of ptid_t.
	(add_thread_silent, add_thread_with_info, add_thread): Add
	process_stratum_target parameter.  Use it for thread and inferior
	searches.
	(is_current_thread): New.
	(thread_info::deletable): Use it.
	(find_thread_ptid, thread_count, in_thread_list)
	(thread_change_ptid, set_resumed, set_running): New
	process_stratum_target parameter.  Pass it down.
	(set_executing): New process_stratum_target parameter.  Pass it
	down.  Adjust reference to 'threads_executing'.
	(threads_are_executing): New process_stratum_target parameter.
	Adjust reference to 'threads_executing'.
	(set_stop_requested, finish_thread_state): New
	process_stratum_target parameter.  Pass it down.
	(switch_to_thread): Also match inferior.
	(switch_to_thread): New process_stratum_target parameter.  Pass it
	down.
	(update_threads_executing): Reimplement.
	* top.c (quit_force): Pop targets from all inferior.
	(gdb_init): Don't call initialize_targets.
	* windows-nat.c (windows_nat_target) <get_windows_debug_event>:
	Declare.
	(windows_add_thread, windows_delete_thread): Adjust.
	(get_windows_debug_event): Rename to ...
	(windows_nat_target::get_windows_debug_event): ... this.  Adjust.
	* tracefile-tfile.c (tfile_target_open): Pass down target.
	* gdbsupport/common-gdbthread.h (struct process_stratum_target):
	Forward declare.
	(switch_to_thread): Add process_stratum_target parameter.
	* mi/mi-interp.c (mi_on_resume_1): Add process_stratum_target
	parameter.  Use it.
	(mi_on_resume): Pass target down.
	* nat/fork-inferior.c (startup_inferior): Add
	process_stratum_target parameter.  Pass it down.
	* nat/fork-inferior.h (startup_inferior): Add
	process_stratum_target parameter.
	* python/py-threadevent.c (py_get_event_thread): Pass target down.

gdb/gdbserver/ChangeLog:
2020-01-10  Pedro Alves  <palves@redhat.com>

	* fork-child.c (post_fork_inferior): Pass target down to
	startup_inferior.
	* inferiors.c (switch_to_thread): Add process_stratum_target
	parameter.
	* lynx-low.c (lynx_target_ops): Now a process_stratum_target.
	* nto-low.c (nto_target_ops): Now a process_stratum_target.
	* linux-low.c (linux_target_ops): Now a process_stratum_target.
	* remote-utils.c (prepare_resume_reply): Pass the target to
	switch_to_thread.
	* target.c (the_target): Now a process_stratum_target.
	(done_accessing_memory): Pass the target to switch_to_thread.
	(set_target_ops): Ajust to use process_stratum_target.
	* target.h (struct target_ops): Rename to ...
	(struct process_stratum_target): ... this.
	(the_target, set_target_ops): Adjust.
	(prepare_to_access_memory): Adjust comment.
	* win32-low.c (child_xfer_memory): Adjust to use
	process_stratum_target.
	(win32_target_ops): Now a process_stratum_target.
2020-01-10 20:06:08 +00:00

2094 lines
59 KiB
C
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/* Target-dependent code for FreeBSD, architecture-independent.
Copyright (C) 2002-2020 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "auxv.h"
#include "gdbcore.h"
#include "inferior.h"
#include "regcache.h"
#include "regset.h"
#include "gdbthread.h"
#include "objfiles.h"
#include "xml-syscall.h"
#include <sys/socket.h>
#include <arpa/inet.h>
#include "elf-bfd.h"
#include "fbsd-tdep.h"
/* This enum is derived from FreeBSD's <sys/signal.h>. */
enum
{
FREEBSD_SIGHUP = 1,
FREEBSD_SIGINT = 2,
FREEBSD_SIGQUIT = 3,
FREEBSD_SIGILL = 4,
FREEBSD_SIGTRAP = 5,
FREEBSD_SIGABRT = 6,
FREEBSD_SIGEMT = 7,
FREEBSD_SIGFPE = 8,
FREEBSD_SIGKILL = 9,
FREEBSD_SIGBUS = 10,
FREEBSD_SIGSEGV = 11,
FREEBSD_SIGSYS = 12,
FREEBSD_SIGPIPE = 13,
FREEBSD_SIGALRM = 14,
FREEBSD_SIGTERM = 15,
FREEBSD_SIGURG = 16,
FREEBSD_SIGSTOP = 17,
FREEBSD_SIGTSTP = 18,
FREEBSD_SIGCONT = 19,
FREEBSD_SIGCHLD = 20,
FREEBSD_SIGTTIN = 21,
FREEBSD_SIGTTOU = 22,
FREEBSD_SIGIO = 23,
FREEBSD_SIGXCPU = 24,
FREEBSD_SIGXFSZ = 25,
FREEBSD_SIGVTALRM = 26,
FREEBSD_SIGPROF = 27,
FREEBSD_SIGWINCH = 28,
FREEBSD_SIGINFO = 29,
FREEBSD_SIGUSR1 = 30,
FREEBSD_SIGUSR2 = 31,
FREEBSD_SIGTHR = 32,
FREEBSD_SIGLIBRT = 33,
FREEBSD_SIGRTMIN = 65,
FREEBSD_SIGRTMAX = 126,
};
/* FreeBSD kernels 12.0 and later include a copy of the
'ptrace_lwpinfo' structure returned by the PT_LWPINFO ptrace
operation in an ELF core note (NT_FREEBSD_PTLWPINFO) for each LWP.
The constants below define the offset of field members and flags in
this structure used by methods in this file. Note that the
'ptrace_lwpinfo' struct in the note is preceded by a 4 byte integer
containing the size of the structure. */
#define LWPINFO_OFFSET 0x4
/* Offsets in ptrace_lwpinfo. */
#define LWPINFO_PL_FLAGS 0x8
#define LWPINFO64_PL_SIGINFO 0x30
#define LWPINFO32_PL_SIGINFO 0x2c
/* Flags in pl_flags. */
#define PL_FLAG_SI 0x20 /* siginfo is valid */
/* Sizes of siginfo_t. */
#define SIZE64_SIGINFO_T 80
#define SIZE32_SIGINFO_T 64
/* Offsets in data structure used in NT_FREEBSD_PROCSTAT_VMMAP core
dump notes. See <sys/user.h> for the definition of struct
kinfo_vmentry. This data structure should have the same layout on
all architectures.
Note that FreeBSD 7.0 used an older version of this structure
(struct kinfo_vmentry), but the NT_FREEBSD_PROCSTAT_VMMAP core
dump note wasn't introduced until FreeBSD 9.2. As a result, the
core dump note has always used the 7.1 and later structure
format. */
#define KVE_STRUCTSIZE 0x0
#define KVE_START 0x8
#define KVE_END 0x10
#define KVE_OFFSET 0x18
#define KVE_FLAGS 0x2c
#define KVE_PROTECTION 0x38
#define KVE_PATH 0x88
/* Flags in the 'kve_protection' field in struct kinfo_vmentry. These
match the KVME_PROT_* constants in <sys/user.h>. */
#define KINFO_VME_PROT_READ 0x00000001
#define KINFO_VME_PROT_WRITE 0x00000002
#define KINFO_VME_PROT_EXEC 0x00000004
/* Flags in the 'kve_flags' field in struct kinfo_vmentry. These
match the KVME_FLAG_* constants in <sys/user.h>. */
#define KINFO_VME_FLAG_COW 0x00000001
#define KINFO_VME_FLAG_NEEDS_COPY 0x00000002
#define KINFO_VME_FLAG_NOCOREDUMP 0x00000004
#define KINFO_VME_FLAG_SUPER 0x00000008
#define KINFO_VME_FLAG_GROWS_UP 0x00000010
#define KINFO_VME_FLAG_GROWS_DOWN 0x00000020
/* Offsets in data structure used in NT_FREEBSD_PROCSTAT_FILES core
dump notes. See <sys/user.h> for the definition of struct
kinfo_file. This data structure should have the same layout on all
architectures.
Note that FreeBSD 7.0 used an older version of this structure
(struct kinfo_ofile), but the NT_FREEBSD_PROCSTAT_FILES core dump
note wasn't introduced until FreeBSD 9.2. As a result, the core
dump note has always used the 7.1 and later structure format. */
#define KF_STRUCTSIZE 0x0
#define KF_TYPE 0x4
#define KF_FD 0x8
#define KF_FLAGS 0x10
#define KF_OFFSET 0x18
#define KF_VNODE_TYPE 0x20
#define KF_SOCK_DOMAIN 0x24
#define KF_SOCK_TYPE 0x28
#define KF_SOCK_PROTOCOL 0x2c
#define KF_SA_LOCAL 0x30
#define KF_SA_PEER 0xb0
#define KF_PATH 0x170
/* Constants for the 'kf_type' field in struct kinfo_file. These
match the KF_TYPE_* constants in <sys/user.h>. */
#define KINFO_FILE_TYPE_VNODE 1
#define KINFO_FILE_TYPE_SOCKET 2
#define KINFO_FILE_TYPE_PIPE 3
#define KINFO_FILE_TYPE_FIFO 4
#define KINFO_FILE_TYPE_KQUEUE 5
#define KINFO_FILE_TYPE_CRYPTO 6
#define KINFO_FILE_TYPE_MQUEUE 7
#define KINFO_FILE_TYPE_SHM 8
#define KINFO_FILE_TYPE_SEM 9
#define KINFO_FILE_TYPE_PTS 10
#define KINFO_FILE_TYPE_PROCDESC 11
/* Special values for the 'kf_fd' field in struct kinfo_file. These
match the KF_FD_TYPE_* constants in <sys/user.h>. */
#define KINFO_FILE_FD_TYPE_CWD -1
#define KINFO_FILE_FD_TYPE_ROOT -2
#define KINFO_FILE_FD_TYPE_JAIL -3
#define KINFO_FILE_FD_TYPE_TRACE -4
#define KINFO_FILE_FD_TYPE_TEXT -5
#define KINFO_FILE_FD_TYPE_CTTY -6
/* Flags in the 'kf_flags' field in struct kinfo_file. These match
the KF_FLAG_* constants in <sys/user.h>. */
#define KINFO_FILE_FLAG_READ 0x00000001
#define KINFO_FILE_FLAG_WRITE 0x00000002
#define KINFO_FILE_FLAG_APPEND 0x00000004
#define KINFO_FILE_FLAG_ASYNC 0x00000008
#define KINFO_FILE_FLAG_FSYNC 0x00000010
#define KINFO_FILE_FLAG_NONBLOCK 0x00000020
#define KINFO_FILE_FLAG_DIRECT 0x00000040
#define KINFO_FILE_FLAG_HASLOCK 0x00000080
#define KINFO_FILE_FLAG_EXEC 0x00004000
/* Constants for the 'kf_vnode_type' field in struct kinfo_file.
These match the KF_VTYPE_* constants in <sys/user.h>. */
#define KINFO_FILE_VTYPE_VREG 1
#define KINFO_FILE_VTYPE_VDIR 2
#define KINFO_FILE_VTYPE_VCHR 4
#define KINFO_FILE_VTYPE_VLNK 5
#define KINFO_FILE_VTYPE_VSOCK 6
#define KINFO_FILE_VTYPE_VFIFO 7
/* Constants for socket address families. These match AF_* constants
in <sys/socket.h>. */
#define FBSD_AF_UNIX 1
#define FBSD_AF_INET 2
#define FBSD_AF_INET6 28
/* Constants for socket types. These match SOCK_* constants in
<sys/socket.h>. */
#define FBSD_SOCK_STREAM 1
#define FBSD_SOCK_DGRAM 2
#define FBSD_SOCK_SEQPACKET 5
/* Constants for IP protocols. These match IPPROTO_* constants in
<netinet/in.h>. */
#define FBSD_IPPROTO_ICMP 1
#define FBSD_IPPROTO_TCP 6
#define FBSD_IPPROTO_UDP 17
#define FBSD_IPPROTO_SCTP 132
/* Socket address structures. These have the same layout on all
FreeBSD architectures. In addition, multibyte fields such as IP
addresses are always stored in network byte order. */
struct fbsd_sockaddr_in
{
uint8_t sin_len;
uint8_t sin_family;
uint8_t sin_port[2];
uint8_t sin_addr[4];
char sin_zero[8];
};
struct fbsd_sockaddr_in6
{
uint8_t sin6_len;
uint8_t sin6_family;
uint8_t sin6_port[2];
uint32_t sin6_flowinfo;
uint8_t sin6_addr[16];
uint32_t sin6_scope_id;
};
struct fbsd_sockaddr_un
{
uint8_t sun_len;
uint8_t sun_family;
char sun_path[104];
};
/* Number of 32-bit words in a signal set. This matches _SIG_WORDS in
<sys/_sigset.h> and is the same value on all architectures. */
#define SIG_WORDS 4
/* Offsets in data structure used in NT_FREEBSD_PROCSTAT_PROC core
dump notes. See <sys/user.h> for the definition of struct
kinfo_proc. This data structure has different layouts on different
architectures mostly due to ILP32 vs LP64. However, FreeBSD/i386
uses a 32-bit time_t while all other architectures use a 64-bit
time_t.
The core dump note actually contains one kinfo_proc structure for
each thread, but all of the process-wide data can be obtained from
the first structure. One result of this note's format is that some
of the process-wide status available in the native target method
from the kern.proc.pid.<pid> sysctl such as ki_stat and ki_siglist
is not available from a core dump. Instead, the per-thread data
structures contain the value of these fields for individual
threads. */
struct kinfo_proc_layout
{
/* Offsets of struct kinfo_proc members. */
int ki_layout;
int ki_pid;
int ki_ppid;
int ki_pgid;
int ki_tpgid;
int ki_sid;
int ki_tdev_freebsd11;
int ki_sigignore;
int ki_sigcatch;
int ki_uid;
int ki_ruid;
int ki_svuid;
int ki_rgid;
int ki_svgid;
int ki_ngroups;
int ki_groups;
int ki_size;
int ki_rssize;
int ki_tsize;
int ki_dsize;
int ki_ssize;
int ki_start;
int ki_nice;
int ki_comm;
int ki_tdev;
int ki_rusage;
int ki_rusage_ch;
/* Offsets of struct rusage members. */
int ru_utime;
int ru_stime;
int ru_maxrss;
int ru_minflt;
int ru_majflt;
};
const struct kinfo_proc_layout kinfo_proc_layout_32 =
{
.ki_layout = 0x4,
.ki_pid = 0x28,
.ki_ppid = 0x2c,
.ki_pgid = 0x30,
.ki_tpgid = 0x34,
.ki_sid = 0x38,
.ki_tdev_freebsd11 = 0x44,
.ki_sigignore = 0x68,
.ki_sigcatch = 0x78,
.ki_uid = 0x88,
.ki_ruid = 0x8c,
.ki_svuid = 0x90,
.ki_rgid = 0x94,
.ki_svgid = 0x98,
.ki_ngroups = 0x9c,
.ki_groups = 0xa0,
.ki_size = 0xe0,
.ki_rssize = 0xe4,
.ki_tsize = 0xec,
.ki_dsize = 0xf0,
.ki_ssize = 0xf4,
.ki_start = 0x118,
.ki_nice = 0x145,
.ki_comm = 0x17f,
.ki_tdev = 0x1f0,
.ki_rusage = 0x220,
.ki_rusage_ch = 0x278,
.ru_utime = 0x0,
.ru_stime = 0x10,
.ru_maxrss = 0x20,
.ru_minflt = 0x30,
.ru_majflt = 0x34,
};
const struct kinfo_proc_layout kinfo_proc_layout_i386 =
{
.ki_layout = 0x4,
.ki_pid = 0x28,
.ki_ppid = 0x2c,
.ki_pgid = 0x30,
.ki_tpgid = 0x34,
.ki_sid = 0x38,
.ki_tdev_freebsd11 = 0x44,
.ki_sigignore = 0x68,
.ki_sigcatch = 0x78,
.ki_uid = 0x88,
.ki_ruid = 0x8c,
.ki_svuid = 0x90,
.ki_rgid = 0x94,
.ki_svgid = 0x98,
.ki_ngroups = 0x9c,
.ki_groups = 0xa0,
.ki_size = 0xe0,
.ki_rssize = 0xe4,
.ki_tsize = 0xec,
.ki_dsize = 0xf0,
.ki_ssize = 0xf4,
.ki_start = 0x118,
.ki_nice = 0x135,
.ki_comm = 0x16f,
.ki_tdev = 0x1e0,
.ki_rusage = 0x210,
.ki_rusage_ch = 0x258,
.ru_utime = 0x0,
.ru_stime = 0x8,
.ru_maxrss = 0x10,
.ru_minflt = 0x20,
.ru_majflt = 0x24,
};
const struct kinfo_proc_layout kinfo_proc_layout_64 =
{
.ki_layout = 0x4,
.ki_pid = 0x48,
.ki_ppid = 0x4c,
.ki_pgid = 0x50,
.ki_tpgid = 0x54,
.ki_sid = 0x58,
.ki_tdev_freebsd11 = 0x64,
.ki_sigignore = 0x88,
.ki_sigcatch = 0x98,
.ki_uid = 0xa8,
.ki_ruid = 0xac,
.ki_svuid = 0xb0,
.ki_rgid = 0xb4,
.ki_svgid = 0xb8,
.ki_ngroups = 0xbc,
.ki_groups = 0xc0,
.ki_size = 0x100,
.ki_rssize = 0x108,
.ki_tsize = 0x118,
.ki_dsize = 0x120,
.ki_ssize = 0x128,
.ki_start = 0x150,
.ki_nice = 0x185,
.ki_comm = 0x1bf,
.ki_tdev = 0x230,
.ki_rusage = 0x260,
.ki_rusage_ch = 0x2f0,
.ru_utime = 0x0,
.ru_stime = 0x10,
.ru_maxrss = 0x20,
.ru_minflt = 0x40,
.ru_majflt = 0x48,
};
static struct gdbarch_data *fbsd_gdbarch_data_handle;
struct fbsd_gdbarch_data
{
struct type *siginfo_type;
};
static void *
init_fbsd_gdbarch_data (struct gdbarch *gdbarch)
{
return GDBARCH_OBSTACK_ZALLOC (gdbarch, struct fbsd_gdbarch_data);
}
static struct fbsd_gdbarch_data *
get_fbsd_gdbarch_data (struct gdbarch *gdbarch)
{
return ((struct fbsd_gdbarch_data *)
gdbarch_data (gdbarch, fbsd_gdbarch_data_handle));
}
struct fbsd_pspace_data
{
/* Offsets in the runtime linker's 'Obj_Entry' structure. */
LONGEST off_linkmap = 0;
LONGEST off_tlsindex = 0;
bool rtld_offsets_valid = false;
};
/* Per-program-space data for FreeBSD architectures. */
static const struct program_space_key<fbsd_pspace_data>
fbsd_pspace_data_handle;
static struct fbsd_pspace_data *
get_fbsd_pspace_data (struct program_space *pspace)
{
struct fbsd_pspace_data *data;
data = fbsd_pspace_data_handle.get (pspace);
if (data == NULL)
data = fbsd_pspace_data_handle.emplace (pspace);
return data;
}
/* This is how we want PTIDs from core files to be printed. */
static std::string
fbsd_core_pid_to_str (struct gdbarch *gdbarch, ptid_t ptid)
{
if (ptid.lwp () != 0)
return string_printf ("LWP %ld", ptid.lwp ());
return normal_pid_to_str (ptid);
}
/* Extract the name assigned to a thread from a core. Returns the
string in a static buffer. */
static const char *
fbsd_core_thread_name (struct gdbarch *gdbarch, struct thread_info *thr)
{
static char buf[80];
struct bfd_section *section;
bfd_size_type size;
if (thr->ptid.lwp () != 0)
{
/* FreeBSD includes a NT_FREEBSD_THRMISC note for each thread
whose contents are defined by a "struct thrmisc" declared in
<sys/procfs.h> on FreeBSD. The per-thread name is stored as
a null-terminated string as the first member of the
structure. Rather than define the full structure here, just
extract the null-terminated name from the start of the
note. */
thread_section_name section_name (".thrmisc", thr->ptid);
section = bfd_get_section_by_name (core_bfd, section_name.c_str ());
if (section != NULL && bfd_section_size (section) > 0)
{
/* Truncate the name if it is longer than "buf". */
size = bfd_section_size (section);
if (size > sizeof buf - 1)
size = sizeof buf - 1;
if (bfd_get_section_contents (core_bfd, section, buf, (file_ptr) 0,
size)
&& buf[0] != '\0')
{
buf[size] = '\0';
/* Note that each thread will report the process command
as its thread name instead of an empty name if a name
has not been set explicitly. Return a NULL name in
that case. */
if (strcmp (buf, elf_tdata (core_bfd)->core->program) != 0)
return buf;
}
}
}
return NULL;
}
/* Implement the "core_xfer_siginfo" gdbarch method. */
static LONGEST
fbsd_core_xfer_siginfo (struct gdbarch *gdbarch, gdb_byte *readbuf,
ULONGEST offset, ULONGEST len)
{
size_t siginfo_size;
if (gdbarch_long_bit (gdbarch) == 32)
siginfo_size = SIZE32_SIGINFO_T;
else
siginfo_size = SIZE64_SIGINFO_T;
if (offset > siginfo_size)
return -1;
thread_section_name section_name (".note.freebsdcore.lwpinfo", inferior_ptid);
asection *section = bfd_get_section_by_name (core_bfd, section_name.c_str ());
if (section == NULL)
return -1;
gdb_byte buf[4];
if (!bfd_get_section_contents (core_bfd, section, buf,
LWPINFO_OFFSET + LWPINFO_PL_FLAGS, 4))
return -1;
int pl_flags = extract_signed_integer (buf, 4, gdbarch_byte_order (gdbarch));
if (!(pl_flags & PL_FLAG_SI))
return -1;
if (offset + len > siginfo_size)
len = siginfo_size - offset;
ULONGEST siginfo_offset;
if (gdbarch_long_bit (gdbarch) == 32)
siginfo_offset = LWPINFO_OFFSET + LWPINFO32_PL_SIGINFO;
else
siginfo_offset = LWPINFO_OFFSET + LWPINFO64_PL_SIGINFO;
if (!bfd_get_section_contents (core_bfd, section, readbuf,
siginfo_offset + offset, len))
return -1;
return len;
}
static int
find_signalled_thread (struct thread_info *info, void *data)
{
if (info->suspend.stop_signal != GDB_SIGNAL_0
&& info->ptid.pid () == inferior_ptid.pid ())
return 1;
return 0;
}
/* Structure for passing information from
fbsd_collect_thread_registers via an iterator to
fbsd_collect_regset_section_cb. */
struct fbsd_collect_regset_section_cb_data
{
const struct regcache *regcache;
bfd *obfd;
char *note_data;
int *note_size;
unsigned long lwp;
enum gdb_signal stop_signal;
int abort_iteration;
};
static void
fbsd_collect_regset_section_cb (const char *sect_name, int supply_size,
int collect_size, const struct regset *regset,
const char *human_name, void *cb_data)
{
char *buf;
struct fbsd_collect_regset_section_cb_data *data
= (struct fbsd_collect_regset_section_cb_data *) cb_data;
if (data->abort_iteration)
return;
gdb_assert (regset->collect_regset);
buf = (char *) xmalloc (collect_size);
regset->collect_regset (regset, data->regcache, -1, buf, collect_size);
/* PRSTATUS still needs to be treated specially. */
if (strcmp (sect_name, ".reg") == 0)
data->note_data = (char *) elfcore_write_prstatus
(data->obfd, data->note_data, data->note_size, data->lwp,
gdb_signal_to_host (data->stop_signal), buf);
else
data->note_data = (char *) elfcore_write_register_note
(data->obfd, data->note_data, data->note_size,
sect_name, buf, collect_size);
xfree (buf);
if (data->note_data == NULL)
data->abort_iteration = 1;
}
/* Records the thread's register state for the corefile note
section. */
static char *
fbsd_collect_thread_registers (const struct regcache *regcache,
ptid_t ptid, bfd *obfd,
char *note_data, int *note_size,
enum gdb_signal stop_signal)
{
struct gdbarch *gdbarch = regcache->arch ();
struct fbsd_collect_regset_section_cb_data data;
data.regcache = regcache;
data.obfd = obfd;
data.note_data = note_data;
data.note_size = note_size;
data.stop_signal = stop_signal;
data.abort_iteration = 0;
data.lwp = ptid.lwp ();
gdbarch_iterate_over_regset_sections (gdbarch,
fbsd_collect_regset_section_cb,
&data, regcache);
return data.note_data;
}
struct fbsd_corefile_thread_data
{
struct gdbarch *gdbarch;
bfd *obfd;
char *note_data;
int *note_size;
enum gdb_signal stop_signal;
};
/* Records the thread's register state for the corefile note
section. */
static void
fbsd_corefile_thread (struct thread_info *info,
struct fbsd_corefile_thread_data *args)
{
struct regcache *regcache;
regcache = get_thread_arch_regcache (info->inf->process_target (),
info->ptid, args->gdbarch);
target_fetch_registers (regcache, -1);
args->note_data = fbsd_collect_thread_registers
(regcache, info->ptid, args->obfd, args->note_data,
args->note_size, args->stop_signal);
}
/* Return a byte_vector containing the contents of a core dump note
for the target object of type OBJECT. If STRUCTSIZE is non-zero,
the data is prefixed with a 32-bit integer size to match the format
used in FreeBSD NT_PROCSTAT_* notes. */
static gdb::optional<gdb::byte_vector>
fbsd_make_note_desc (enum target_object object, uint32_t structsize)
{
gdb::optional<gdb::byte_vector> buf =
target_read_alloc (current_top_target (), object, NULL);
if (!buf || buf->empty ())
return {};
if (structsize == 0)
return buf;
gdb::byte_vector desc (sizeof (structsize) + buf->size ());
memcpy (desc.data (), &structsize, sizeof (structsize));
memcpy (desc.data () + sizeof (structsize), buf->data (), buf->size ());
return desc;
}
/* Create appropriate note sections for a corefile, returning them in
allocated memory. */
static char *
fbsd_make_corefile_notes (struct gdbarch *gdbarch, bfd *obfd, int *note_size)
{
struct fbsd_corefile_thread_data thread_args;
char *note_data = NULL;
Elf_Internal_Ehdr *i_ehdrp;
struct thread_info *curr_thr, *signalled_thr;
/* Put a "FreeBSD" label in the ELF header. */
i_ehdrp = elf_elfheader (obfd);
i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_FREEBSD;
gdb_assert (gdbarch_iterate_over_regset_sections_p (gdbarch));
if (get_exec_file (0))
{
const char *fname = lbasename (get_exec_file (0));
char *psargs = xstrdup (fname);
if (get_inferior_args ())
psargs = reconcat (psargs, psargs, " ", get_inferior_args (),
(char *) NULL);
note_data = elfcore_write_prpsinfo (obfd, note_data, note_size,
fname, psargs);
}
/* Thread register information. */
try
{
update_thread_list ();
}
catch (const gdb_exception_error &e)
{
exception_print (gdb_stderr, e);
}
/* Like the kernel, prefer dumping the signalled thread first.
"First thread" is what tools use to infer the signalled thread.
In case there's more than one signalled thread, prefer the
current thread, if it is signalled. */
curr_thr = inferior_thread ();
if (curr_thr->suspend.stop_signal != GDB_SIGNAL_0)
signalled_thr = curr_thr;
else
{
signalled_thr = iterate_over_threads (find_signalled_thread, NULL);
if (signalled_thr == NULL)
signalled_thr = curr_thr;
}
thread_args.gdbarch = gdbarch;
thread_args.obfd = obfd;
thread_args.note_data = note_data;
thread_args.note_size = note_size;
thread_args.stop_signal = signalled_thr->suspend.stop_signal;
fbsd_corefile_thread (signalled_thr, &thread_args);
for (thread_info *thr : current_inferior ()->non_exited_threads ())
{
if (thr == signalled_thr)
continue;
fbsd_corefile_thread (thr, &thread_args);
}
note_data = thread_args.note_data;
/* Auxiliary vector. */
uint32_t structsize = gdbarch_ptr_bit (gdbarch) / 4; /* Elf_Auxinfo */
gdb::optional<gdb::byte_vector> note_desc =
fbsd_make_note_desc (TARGET_OBJECT_AUXV, structsize);
if (note_desc && !note_desc->empty ())
{
note_data = elfcore_write_note (obfd, note_data, note_size, "FreeBSD",
NT_FREEBSD_PROCSTAT_AUXV,
note_desc->data (), note_desc->size ());
if (!note_data)
return NULL;
}
/* Virtual memory mappings. */
note_desc = fbsd_make_note_desc (TARGET_OBJECT_FREEBSD_VMMAP, 0);
if (note_desc && !note_desc->empty ())
{
note_data = elfcore_write_note (obfd, note_data, note_size, "FreeBSD",
NT_FREEBSD_PROCSTAT_VMMAP,
note_desc->data (), note_desc->size ());
if (!note_data)
return NULL;
}
note_desc = fbsd_make_note_desc (TARGET_OBJECT_FREEBSD_PS_STRINGS, 0);
if (note_desc && !note_desc->empty ())
{
note_data = elfcore_write_note (obfd, note_data, note_size, "FreeBSD",
NT_FREEBSD_PROCSTAT_PSSTRINGS,
note_desc->data (), note_desc->size ());
if (!note_data)
return NULL;
}
return note_data;
}
/* Helper function to generate the file descriptor description for a
single open file in 'info proc files'. */
static const char *
fbsd_file_fd (int kf_fd)
{
switch (kf_fd)
{
case KINFO_FILE_FD_TYPE_CWD:
return "cwd";
case KINFO_FILE_FD_TYPE_ROOT:
return "root";
case KINFO_FILE_FD_TYPE_JAIL:
return "jail";
case KINFO_FILE_FD_TYPE_TRACE:
return "trace";
case KINFO_FILE_FD_TYPE_TEXT:
return "text";
case KINFO_FILE_FD_TYPE_CTTY:
return "ctty";
default:
return int_string (kf_fd, 10, 1, 0, 0);
}
}
/* Helper function to generate the file type for a single open file in
'info proc files'. */
static const char *
fbsd_file_type (int kf_type, int kf_vnode_type)
{
switch (kf_type)
{
case KINFO_FILE_TYPE_VNODE:
switch (kf_vnode_type)
{
case KINFO_FILE_VTYPE_VREG:
return "file";
case KINFO_FILE_VTYPE_VDIR:
return "dir";
case KINFO_FILE_VTYPE_VCHR:
return "chr";
case KINFO_FILE_VTYPE_VLNK:
return "link";
case KINFO_FILE_VTYPE_VSOCK:
return "socket";
case KINFO_FILE_VTYPE_VFIFO:
return "fifo";
default:
{
char *str = get_print_cell ();
xsnprintf (str, PRINT_CELL_SIZE, "vn:%d", kf_vnode_type);
return str;
}
}
case KINFO_FILE_TYPE_SOCKET:
return "socket";
case KINFO_FILE_TYPE_PIPE:
return "pipe";
case KINFO_FILE_TYPE_FIFO:
return "fifo";
case KINFO_FILE_TYPE_KQUEUE:
return "kqueue";
case KINFO_FILE_TYPE_CRYPTO:
return "crypto";
case KINFO_FILE_TYPE_MQUEUE:
return "mqueue";
case KINFO_FILE_TYPE_SHM:
return "shm";
case KINFO_FILE_TYPE_SEM:
return "sem";
case KINFO_FILE_TYPE_PTS:
return "pts";
case KINFO_FILE_TYPE_PROCDESC:
return "proc";
default:
return int_string (kf_type, 10, 1, 0, 0);
}
}
/* Helper function to generate the file flags for a single open file in
'info proc files'. */
static const char *
fbsd_file_flags (int kf_flags)
{
static char file_flags[10];
file_flags[0] = (kf_flags & KINFO_FILE_FLAG_READ) ? 'r' : '-';
file_flags[1] = (kf_flags & KINFO_FILE_FLAG_WRITE) ? 'w' : '-';
file_flags[2] = (kf_flags & KINFO_FILE_FLAG_EXEC) ? 'x' : '-';
file_flags[3] = (kf_flags & KINFO_FILE_FLAG_APPEND) ? 'a' : '-';
file_flags[4] = (kf_flags & KINFO_FILE_FLAG_ASYNC) ? 's' : '-';
file_flags[5] = (kf_flags & KINFO_FILE_FLAG_FSYNC) ? 'f' : '-';
file_flags[6] = (kf_flags & KINFO_FILE_FLAG_NONBLOCK) ? 'n' : '-';
file_flags[7] = (kf_flags & KINFO_FILE_FLAG_DIRECT) ? 'd' : '-';
file_flags[8] = (kf_flags & KINFO_FILE_FLAG_HASLOCK) ? 'l' : '-';
file_flags[9] = '\0';
return file_flags;
}
/* Helper function to generate the name of an IP protocol. */
static const char *
fbsd_ipproto (int protocol)
{
switch (protocol)
{
case FBSD_IPPROTO_ICMP:
return "icmp";
case FBSD_IPPROTO_TCP:
return "tcp";
case FBSD_IPPROTO_UDP:
return "udp";
case FBSD_IPPROTO_SCTP:
return "sctp";
default:
{
char *str = get_print_cell ();
xsnprintf (str, PRINT_CELL_SIZE, "ip<%d>", protocol);
return str;
}
}
}
/* Helper function to print out an IPv4 socket address. */
static void
fbsd_print_sockaddr_in (const void *sockaddr)
{
const struct fbsd_sockaddr_in *sin =
reinterpret_cast<const struct fbsd_sockaddr_in *> (sockaddr);
char buf[INET_ADDRSTRLEN];
if (inet_ntop (AF_INET, sin->sin_addr, buf, sizeof buf) == nullptr)
error (_("Failed to format IPv4 address"));
printf_filtered ("%s:%u", buf,
(sin->sin_port[0] << 8) | sin->sin_port[1]);
}
/* Helper function to print out an IPv6 socket address. */
static void
fbsd_print_sockaddr_in6 (const void *sockaddr)
{
const struct fbsd_sockaddr_in6 *sin6 =
reinterpret_cast<const struct fbsd_sockaddr_in6 *> (sockaddr);
char buf[INET6_ADDRSTRLEN];
if (inet_ntop (AF_INET6, sin6->sin6_addr, buf, sizeof buf) == nullptr)
error (_("Failed to format IPv6 address"));
printf_filtered ("%s.%u", buf,
(sin6->sin6_port[0] << 8) | sin6->sin6_port[1]);
}
/* See fbsd-tdep.h. */
void
fbsd_info_proc_files_header ()
{
printf_filtered (_("Open files:\n\n"));
printf_filtered (" %6s %6s %10s %9s %s\n",
"FD", "Type", "Offset", "Flags ", "Name");
}
/* See fbsd-tdep.h. */
void
fbsd_info_proc_files_entry (int kf_type, int kf_fd, int kf_flags,
LONGEST kf_offset, int kf_vnode_type,
int kf_sock_domain, int kf_sock_type,
int kf_sock_protocol, const void *kf_sa_local,
const void *kf_sa_peer, const void *kf_path)
{
printf_filtered (" %6s %6s %10s %8s ",
fbsd_file_fd (kf_fd),
fbsd_file_type (kf_type, kf_vnode_type),
kf_offset > -1 ? hex_string (kf_offset) : "-",
fbsd_file_flags (kf_flags));
if (kf_type == KINFO_FILE_TYPE_SOCKET)
{
switch (kf_sock_domain)
{
case FBSD_AF_UNIX:
{
switch (kf_sock_type)
{
case FBSD_SOCK_STREAM:
printf_filtered ("unix stream:");
break;
case FBSD_SOCK_DGRAM:
printf_filtered ("unix dgram:");
break;
case FBSD_SOCK_SEQPACKET:
printf_filtered ("unix seqpacket:");
break;
default:
printf_filtered ("unix <%d>:", kf_sock_type);
break;
}
/* For local sockets, print out the first non-nul path
rather than both paths. */
const struct fbsd_sockaddr_un *saddr_un
= reinterpret_cast<const struct fbsd_sockaddr_un *> (kf_sa_local);
if (saddr_un->sun_path[0] == 0)
saddr_un = reinterpret_cast<const struct fbsd_sockaddr_un *>
(kf_sa_peer);
printf_filtered ("%s", saddr_un->sun_path);
break;
}
case FBSD_AF_INET:
printf_filtered ("%s4 ", fbsd_ipproto (kf_sock_protocol));
fbsd_print_sockaddr_in (kf_sa_local);
printf_filtered (" -> ");
fbsd_print_sockaddr_in (kf_sa_peer);
break;
case FBSD_AF_INET6:
printf_filtered ("%s6 ", fbsd_ipproto (kf_sock_protocol));
fbsd_print_sockaddr_in6 (kf_sa_local);
printf_filtered (" -> ");
fbsd_print_sockaddr_in6 (kf_sa_peer);
break;
}
}
else
printf_filtered ("%s", reinterpret_cast<const char *> (kf_path));
printf_filtered ("\n");
}
/* Implement "info proc files" for a corefile. */
static void
fbsd_core_info_proc_files (struct gdbarch *gdbarch)
{
asection *section
= bfd_get_section_by_name (core_bfd, ".note.freebsdcore.files");
if (section == NULL)
{
warning (_("unable to find open files in core file"));
return;
}
size_t note_size = bfd_section_size (section);
if (note_size < 4)
error (_("malformed core note - too short for header"));
gdb::def_vector<unsigned char> contents (note_size);
if (!bfd_get_section_contents (core_bfd, section, contents.data (),
0, note_size))
error (_("could not get core note contents"));
unsigned char *descdata = contents.data ();
unsigned char *descend = descdata + note_size;
/* Skip over the structure size. */
descdata += 4;
fbsd_info_proc_files_header ();
while (descdata + KF_PATH < descend)
{
ULONGEST structsize = bfd_get_32 (core_bfd, descdata + KF_STRUCTSIZE);
if (structsize < KF_PATH)
error (_("malformed core note - file structure too small"));
LONGEST type = bfd_get_signed_32 (core_bfd, descdata + KF_TYPE);
LONGEST fd = bfd_get_signed_32 (core_bfd, descdata + KF_FD);
LONGEST flags = bfd_get_signed_32 (core_bfd, descdata + KF_FLAGS);
LONGEST offset = bfd_get_signed_64 (core_bfd, descdata + KF_OFFSET);
LONGEST vnode_type = bfd_get_signed_32 (core_bfd,
descdata + KF_VNODE_TYPE);
LONGEST sock_domain = bfd_get_signed_32 (core_bfd,
descdata + KF_SOCK_DOMAIN);
LONGEST sock_type = bfd_get_signed_32 (core_bfd, descdata + KF_SOCK_TYPE);
LONGEST sock_protocol = bfd_get_signed_32 (core_bfd,
descdata + KF_SOCK_PROTOCOL);
fbsd_info_proc_files_entry (type, fd, flags, offset, vnode_type,
sock_domain, sock_type, sock_protocol,
descdata + KF_SA_LOCAL, descdata + KF_SA_PEER,
descdata + KF_PATH);
descdata += structsize;
}
}
/* Helper function to generate mappings flags for a single VM map
entry in 'info proc mappings'. */
static const char *
fbsd_vm_map_entry_flags (int kve_flags, int kve_protection)
{
static char vm_flags[9];
vm_flags[0] = (kve_protection & KINFO_VME_PROT_READ) ? 'r' : '-';
vm_flags[1] = (kve_protection & KINFO_VME_PROT_WRITE) ? 'w' : '-';
vm_flags[2] = (kve_protection & KINFO_VME_PROT_EXEC) ? 'x' : '-';
vm_flags[3] = ' ';
vm_flags[4] = (kve_flags & KINFO_VME_FLAG_COW) ? 'C' : '-';
vm_flags[5] = (kve_flags & KINFO_VME_FLAG_NEEDS_COPY) ? 'N' : '-';
vm_flags[6] = (kve_flags & KINFO_VME_FLAG_SUPER) ? 'S' : '-';
vm_flags[7] = (kve_flags & KINFO_VME_FLAG_GROWS_UP) ? 'U'
: (kve_flags & KINFO_VME_FLAG_GROWS_DOWN) ? 'D' : '-';
vm_flags[8] = '\0';
return vm_flags;
}
/* See fbsd-tdep.h. */
void
fbsd_info_proc_mappings_header (int addr_bit)
{
printf_filtered (_("Mapped address spaces:\n\n"));
if (addr_bit == 64)
{
printf_filtered (" %18s %18s %10s %10s %9s %s\n",
"Start Addr",
" End Addr",
" Size", " Offset", "Flags ", "File");
}
else
{
printf_filtered ("\t%10s %10s %10s %10s %9s %s\n",
"Start Addr",
" End Addr",
" Size", " Offset", "Flags ", "File");
}
}
/* See fbsd-tdep.h. */
void
fbsd_info_proc_mappings_entry (int addr_bit, ULONGEST kve_start,
ULONGEST kve_end, ULONGEST kve_offset,
int kve_flags, int kve_protection,
const void *kve_path)
{
if (addr_bit == 64)
{
printf_filtered (" %18s %18s %10s %10s %9s %s\n",
hex_string (kve_start),
hex_string (kve_end),
hex_string (kve_end - kve_start),
hex_string (kve_offset),
fbsd_vm_map_entry_flags (kve_flags, kve_protection),
reinterpret_cast<const char *> (kve_path));
}
else
{
printf_filtered ("\t%10s %10s %10s %10s %9s %s\n",
hex_string (kve_start),
hex_string (kve_end),
hex_string (kve_end - kve_start),
hex_string (kve_offset),
fbsd_vm_map_entry_flags (kve_flags, kve_protection),
reinterpret_cast<const char *> (kve_path));
}
}
/* Implement "info proc mappings" for a corefile. */
static void
fbsd_core_info_proc_mappings (struct gdbarch *gdbarch)
{
asection *section;
unsigned char *descdata, *descend;
size_t note_size;
section = bfd_get_section_by_name (core_bfd, ".note.freebsdcore.vmmap");
if (section == NULL)
{
warning (_("unable to find mappings in core file"));
return;
}
note_size = bfd_section_size (section);
if (note_size < 4)
error (_("malformed core note - too short for header"));
gdb::def_vector<unsigned char> contents (note_size);
if (!bfd_get_section_contents (core_bfd, section, contents.data (),
0, note_size))
error (_("could not get core note contents"));
descdata = contents.data ();
descend = descdata + note_size;
/* Skip over the structure size. */
descdata += 4;
fbsd_info_proc_mappings_header (gdbarch_addr_bit (gdbarch));
while (descdata + KVE_PATH < descend)
{
ULONGEST structsize = bfd_get_32 (core_bfd, descdata + KVE_STRUCTSIZE);
if (structsize < KVE_PATH)
error (_("malformed core note - vmmap entry too small"));
ULONGEST start = bfd_get_64 (core_bfd, descdata + KVE_START);
ULONGEST end = bfd_get_64 (core_bfd, descdata + KVE_END);
ULONGEST offset = bfd_get_64 (core_bfd, descdata + KVE_OFFSET);
LONGEST flags = bfd_get_signed_32 (core_bfd, descdata + KVE_FLAGS);
LONGEST prot = bfd_get_signed_32 (core_bfd, descdata + KVE_PROTECTION);
fbsd_info_proc_mappings_entry (gdbarch_addr_bit (gdbarch), start, end,
offset, flags, prot, descdata + KVE_PATH);
descdata += structsize;
}
}
/* Fetch the pathname of a vnode for a single file descriptor from the
file table core note. */
static gdb::unique_xmalloc_ptr<char>
fbsd_core_vnode_path (struct gdbarch *gdbarch, int fd)
{
asection *section;
unsigned char *descdata, *descend;
size_t note_size;
section = bfd_get_section_by_name (core_bfd, ".note.freebsdcore.files");
if (section == NULL)
return nullptr;
note_size = bfd_section_size (section);
if (note_size < 4)
error (_("malformed core note - too short for header"));
gdb::def_vector<unsigned char> contents (note_size);
if (!bfd_get_section_contents (core_bfd, section, contents.data (),
0, note_size))
error (_("could not get core note contents"));
descdata = contents.data ();
descend = descdata + note_size;
/* Skip over the structure size. */
descdata += 4;
while (descdata + KF_PATH < descend)
{
ULONGEST structsize;
structsize = bfd_get_32 (core_bfd, descdata + KF_STRUCTSIZE);
if (structsize < KF_PATH)
error (_("malformed core note - file structure too small"));
if (bfd_get_32 (core_bfd, descdata + KF_TYPE) == KINFO_FILE_TYPE_VNODE
&& bfd_get_signed_32 (core_bfd, descdata + KF_FD) == fd)
{
char *path = (char *) descdata + KF_PATH;
return make_unique_xstrdup (path);
}
descdata += structsize;
}
return nullptr;
}
/* Helper function to read a struct timeval. */
static void
fbsd_core_fetch_timeval (struct gdbarch *gdbarch, unsigned char *data,
LONGEST &sec, ULONGEST &usec)
{
if (gdbarch_addr_bit (gdbarch) == 64)
{
sec = bfd_get_signed_64 (core_bfd, data);
usec = bfd_get_64 (core_bfd, data + 8);
}
else if (bfd_get_arch (core_bfd) == bfd_arch_i386)
{
sec = bfd_get_signed_32 (core_bfd, data);
usec = bfd_get_32 (core_bfd, data + 4);
}
else
{
sec = bfd_get_signed_64 (core_bfd, data);
usec = bfd_get_32 (core_bfd, data + 8);
}
}
/* Print out the contents of a signal set. */
static void
fbsd_print_sigset (const char *descr, unsigned char *sigset)
{
printf_filtered ("%s: ", descr);
for (int i = 0; i < SIG_WORDS; i++)
printf_filtered ("%08x ",
(unsigned int) bfd_get_32 (core_bfd, sigset + i * 4));
printf_filtered ("\n");
}
/* Implement "info proc status" for a corefile. */
static void
fbsd_core_info_proc_status (struct gdbarch *gdbarch)
{
const struct kinfo_proc_layout *kp;
asection *section;
unsigned char *descdata;
int addr_bit, long_bit;
size_t note_size;
ULONGEST value;
LONGEST sec;
section = bfd_get_section_by_name (core_bfd, ".note.freebsdcore.proc");
if (section == NULL)
{
warning (_("unable to find process info in core file"));
return;
}
addr_bit = gdbarch_addr_bit (gdbarch);
if (addr_bit == 64)
kp = &kinfo_proc_layout_64;
else if (bfd_get_arch (core_bfd) == bfd_arch_i386)
kp = &kinfo_proc_layout_i386;
else
kp = &kinfo_proc_layout_32;
long_bit = gdbarch_long_bit (gdbarch);
/*
* Ensure that the note is large enough for all of the fields fetched
* by this function. In particular, the note must contain the 32-bit
* structure size, then it must be long enough to access the last
* field used (ki_rusage_ch.ru_majflt) which is the size of a long.
*/
note_size = bfd_section_size (section);
if (note_size < (4 + kp->ki_rusage_ch + kp->ru_majflt
+ long_bit / TARGET_CHAR_BIT))
error (_("malformed core note - too short"));
gdb::def_vector<unsigned char> contents (note_size);
if (!bfd_get_section_contents (core_bfd, section, contents.data (),
0, note_size))
error (_("could not get core note contents"));
descdata = contents.data ();
/* Skip over the structure size. */
descdata += 4;
/* Verify 'ki_layout' is 0. */
if (bfd_get_32 (core_bfd, descdata + kp->ki_layout) != 0)
{
warning (_("unsupported process information in core file"));
return;
}
printf_filtered ("Name: %.19s\n", descdata + kp->ki_comm);
printf_filtered ("Process ID: %s\n",
pulongest (bfd_get_32 (core_bfd, descdata + kp->ki_pid)));
printf_filtered ("Parent process: %s\n",
pulongest (bfd_get_32 (core_bfd, descdata + kp->ki_ppid)));
printf_filtered ("Process group: %s\n",
pulongest (bfd_get_32 (core_bfd, descdata + kp->ki_pgid)));
printf_filtered ("Session id: %s\n",
pulongest (bfd_get_32 (core_bfd, descdata + kp->ki_sid)));
/* FreeBSD 12.0 and later store a 64-bit dev_t at 'ki_tdev'. Older
kernels store a 32-bit dev_t at 'ki_tdev_freebsd11'. In older
kernels the 64-bit 'ki_tdev' field is in a reserved section of
the structure that is cleared to zero. Assume that a zero value
in ki_tdev indicates a core dump from an older kernel and use the
value in 'ki_tdev_freebsd11' instead. */
value = bfd_get_64 (core_bfd, descdata + kp->ki_tdev);
if (value == 0)
value = bfd_get_32 (core_bfd, descdata + kp->ki_tdev_freebsd11);
printf_filtered ("TTY: %s\n", pulongest (value));
printf_filtered ("TTY owner process group: %s\n",
pulongest (bfd_get_32 (core_bfd, descdata + kp->ki_tpgid)));
printf_filtered ("User IDs (real, effective, saved): %s %s %s\n",
pulongest (bfd_get_32 (core_bfd, descdata + kp->ki_ruid)),
pulongest (bfd_get_32 (core_bfd, descdata + kp->ki_uid)),
pulongest (bfd_get_32 (core_bfd, descdata + kp->ki_svuid)));
printf_filtered ("Group IDs (real, effective, saved): %s %s %s\n",
pulongest (bfd_get_32 (core_bfd, descdata + kp->ki_rgid)),
pulongest (bfd_get_32 (core_bfd, descdata + kp->ki_groups)),
pulongest (bfd_get_32 (core_bfd, descdata + kp->ki_svgid)));
printf_filtered ("Groups: ");
uint16_t ngroups = bfd_get_16 (core_bfd, descdata + kp->ki_ngroups);
for (int i = 0; i < ngroups; i++)
printf_filtered ("%s ",
pulongest (bfd_get_32 (core_bfd,
descdata + kp->ki_groups + i * 4)));
printf_filtered ("\n");
value = bfd_get (long_bit, core_bfd,
descdata + kp->ki_rusage + kp->ru_minflt);
printf_filtered ("Minor faults (no memory page): %s\n", pulongest (value));
value = bfd_get (long_bit, core_bfd,
descdata + kp->ki_rusage_ch + kp->ru_minflt);
printf_filtered ("Minor faults, children: %s\n", pulongest (value));
value = bfd_get (long_bit, core_bfd,
descdata + kp->ki_rusage + kp->ru_majflt);
printf_filtered ("Major faults (memory page faults): %s\n",
pulongest (value));
value = bfd_get (long_bit, core_bfd,
descdata + kp->ki_rusage_ch + kp->ru_majflt);
printf_filtered ("Major faults, children: %s\n", pulongest (value));
fbsd_core_fetch_timeval (gdbarch,
descdata + kp->ki_rusage + kp->ru_utime,
sec, value);
printf_filtered ("utime: %s.%06d\n", plongest (sec), (int) value);
fbsd_core_fetch_timeval (gdbarch,
descdata + kp->ki_rusage + kp->ru_stime,
sec, value);
printf_filtered ("stime: %s.%06d\n", plongest (sec), (int) value);
fbsd_core_fetch_timeval (gdbarch,
descdata + kp->ki_rusage_ch + kp->ru_utime,
sec, value);
printf_filtered ("utime, children: %s.%06d\n", plongest (sec), (int) value);
fbsd_core_fetch_timeval (gdbarch,
descdata + kp->ki_rusage_ch + kp->ru_stime,
sec, value);
printf_filtered ("stime, children: %s.%06d\n", plongest (sec), (int) value);
printf_filtered ("'nice' value: %d\n",
(int) bfd_get_signed_8 (core_bfd, descdata + kp->ki_nice));
fbsd_core_fetch_timeval (gdbarch, descdata + kp->ki_start, sec, value);
printf_filtered ("Start time: %s.%06d\n", plongest (sec), (int) value);
printf_filtered ("Virtual memory size: %s kB\n",
pulongest (bfd_get (addr_bit, core_bfd,
descdata + kp->ki_size) / 1024));
printf_filtered ("Data size: %s pages\n",
pulongest (bfd_get (addr_bit, core_bfd,
descdata + kp->ki_dsize)));
printf_filtered ("Stack size: %s pages\n",
pulongest (bfd_get (addr_bit, core_bfd,
descdata + kp->ki_ssize)));
printf_filtered ("Text size: %s pages\n",
pulongest (bfd_get (addr_bit, core_bfd,
descdata + kp->ki_tsize)));
printf_filtered ("Resident set size: %s pages\n",
pulongest (bfd_get (addr_bit, core_bfd,
descdata + kp->ki_rssize)));
printf_filtered ("Maximum RSS: %s pages\n",
pulongest (bfd_get (long_bit, core_bfd,
descdata + kp->ki_rusage
+ kp->ru_maxrss)));
fbsd_print_sigset ("Ignored Signals", descdata + kp->ki_sigignore);
fbsd_print_sigset ("Caught Signals", descdata + kp->ki_sigcatch);
}
/* Implement the "core_info_proc" gdbarch method. */
static void
fbsd_core_info_proc (struct gdbarch *gdbarch, const char *args,
enum info_proc_what what)
{
bool do_cmdline = false;
bool do_cwd = false;
bool do_exe = false;
bool do_files = false;
bool do_mappings = false;
bool do_status = false;
int pid;
switch (what)
{
case IP_MINIMAL:
do_cmdline = true;
do_cwd = true;
do_exe = true;
break;
case IP_MAPPINGS:
do_mappings = true;
break;
case IP_STATUS:
case IP_STAT:
do_status = true;
break;
case IP_CMDLINE:
do_cmdline = true;
break;
case IP_EXE:
do_exe = true;
break;
case IP_CWD:
do_cwd = true;
break;
case IP_FILES:
do_files = true;
break;
case IP_ALL:
do_cmdline = true;
do_cwd = true;
do_exe = true;
do_files = true;
do_mappings = true;
do_status = true;
break;
default:
return;
}
pid = bfd_core_file_pid (core_bfd);
if (pid != 0)
printf_filtered (_("process %d\n"), pid);
if (do_cmdline)
{
const char *cmdline;
cmdline = bfd_core_file_failing_command (core_bfd);
if (cmdline)
printf_filtered ("cmdline = '%s'\n", cmdline);
else
warning (_("Command line unavailable"));
}
if (do_cwd)
{
gdb::unique_xmalloc_ptr<char> cwd =
fbsd_core_vnode_path (gdbarch, KINFO_FILE_FD_TYPE_CWD);
if (cwd)
printf_filtered ("cwd = '%s'\n", cwd.get ());
else
warning (_("unable to read current working directory"));
}
if (do_exe)
{
gdb::unique_xmalloc_ptr<char> exe =
fbsd_core_vnode_path (gdbarch, KINFO_FILE_FD_TYPE_TEXT);
if (exe)
printf_filtered ("exe = '%s'\n", exe.get ());
else
warning (_("unable to read executable path name"));
}
if (do_files)
fbsd_core_info_proc_files (gdbarch);
if (do_mappings)
fbsd_core_info_proc_mappings (gdbarch);
if (do_status)
fbsd_core_info_proc_status (gdbarch);
}
/* Print descriptions of FreeBSD-specific AUXV entries to FILE. */
static void
fbsd_print_auxv_entry (struct gdbarch *gdbarch, struct ui_file *file,
CORE_ADDR type, CORE_ADDR val)
{
const char *name = "???";
const char *description = "";
enum auxv_format format = AUXV_FORMAT_HEX;
switch (type)
{
case AT_NULL:
case AT_IGNORE:
case AT_EXECFD:
case AT_PHDR:
case AT_PHENT:
case AT_PHNUM:
case AT_PAGESZ:
case AT_BASE:
case AT_FLAGS:
case AT_ENTRY:
case AT_NOTELF:
case AT_UID:
case AT_EUID:
case AT_GID:
case AT_EGID:
default_print_auxv_entry (gdbarch, file, type, val);
return;
#define _TAGNAME(tag) #tag
#define TAGNAME(tag) _TAGNAME(AT_##tag)
#define TAG(tag, text, kind) \
case AT_FREEBSD_##tag: name = TAGNAME(tag); description = text; format = kind; break
TAG (EXECPATH, _("Executable path"), AUXV_FORMAT_STR);
TAG (CANARY, _("Canary for SSP"), AUXV_FORMAT_HEX);
TAG (CANARYLEN, ("Length of the SSP canary"), AUXV_FORMAT_DEC);
TAG (OSRELDATE, _("OSRELDATE"), AUXV_FORMAT_DEC);
TAG (NCPUS, _("Number of CPUs"), AUXV_FORMAT_DEC);
TAG (PAGESIZES, _("Pagesizes"), AUXV_FORMAT_HEX);
TAG (PAGESIZESLEN, _("Number of pagesizes"), AUXV_FORMAT_DEC);
TAG (TIMEKEEP, _("Pointer to timehands"), AUXV_FORMAT_HEX);
TAG (STACKPROT, _("Initial stack protection"), AUXV_FORMAT_HEX);
TAG (EHDRFLAGS, _("ELF header e_flags"), AUXV_FORMAT_HEX);
TAG (HWCAP, _("Machine-dependent CPU capability hints"), AUXV_FORMAT_HEX);
TAG (HWCAP2, _("Extension of AT_HWCAP"), AUXV_FORMAT_HEX);
}
fprint_auxv_entry (file, name, description, format, type, val);
}
/* Implement the "get_siginfo_type" gdbarch method. */
static struct type *
fbsd_get_siginfo_type (struct gdbarch *gdbarch)
{
struct fbsd_gdbarch_data *fbsd_gdbarch_data;
struct type *int_type, *int32_type, *uint32_type, *long_type, *void_ptr_type;
struct type *uid_type, *pid_type;
struct type *sigval_type, *reason_type;
struct type *siginfo_type;
struct type *type;
fbsd_gdbarch_data = get_fbsd_gdbarch_data (gdbarch);
if (fbsd_gdbarch_data->siginfo_type != NULL)
return fbsd_gdbarch_data->siginfo_type;
int_type = arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch),
0, "int");
int32_type = arch_integer_type (gdbarch, 32, 0, "int32_t");
uint32_type = arch_integer_type (gdbarch, 32, 1, "uint32_t");
long_type = arch_integer_type (gdbarch, gdbarch_long_bit (gdbarch),
0, "long");
void_ptr_type = lookup_pointer_type (builtin_type (gdbarch)->builtin_void);
/* union sigval */
sigval_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_UNION);
TYPE_NAME (sigval_type) = xstrdup ("sigval");
append_composite_type_field (sigval_type, "sival_int", int_type);
append_composite_type_field (sigval_type, "sival_ptr", void_ptr_type);
/* __pid_t */
pid_type = arch_type (gdbarch, TYPE_CODE_TYPEDEF,
TYPE_LENGTH (int32_type) * TARGET_CHAR_BIT, "__pid_t");
TYPE_TARGET_TYPE (pid_type) = int32_type;
TYPE_TARGET_STUB (pid_type) = 1;
/* __uid_t */
uid_type = arch_type (gdbarch, TYPE_CODE_TYPEDEF,
TYPE_LENGTH (uint32_type) * TARGET_CHAR_BIT,
"__uid_t");
TYPE_TARGET_TYPE (uid_type) = uint32_type;
TYPE_TARGET_STUB (uid_type) = 1;
/* _reason */
reason_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_UNION);
/* _fault */
type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
append_composite_type_field (type, "si_trapno", int_type);
append_composite_type_field (reason_type, "_fault", type);
/* _timer */
type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
append_composite_type_field (type, "si_timerid", int_type);
append_composite_type_field (type, "si_overrun", int_type);
append_composite_type_field (reason_type, "_timer", type);
/* _mesgq */
type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
append_composite_type_field (type, "si_mqd", int_type);
append_composite_type_field (reason_type, "_mesgq", type);
/* _poll */
type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
append_composite_type_field (type, "si_band", long_type);
append_composite_type_field (reason_type, "_poll", type);
/* __spare__ */
type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
append_composite_type_field (type, "__spare1__", long_type);
append_composite_type_field (type, "__spare2__",
init_vector_type (int_type, 7));
append_composite_type_field (reason_type, "__spare__", type);
/* struct siginfo */
siginfo_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
TYPE_NAME (siginfo_type) = xstrdup ("siginfo");
append_composite_type_field (siginfo_type, "si_signo", int_type);
append_composite_type_field (siginfo_type, "si_errno", int_type);
append_composite_type_field (siginfo_type, "si_code", int_type);
append_composite_type_field (siginfo_type, "si_pid", pid_type);
append_composite_type_field (siginfo_type, "si_uid", uid_type);
append_composite_type_field (siginfo_type, "si_status", int_type);
append_composite_type_field (siginfo_type, "si_addr", void_ptr_type);
append_composite_type_field (siginfo_type, "si_value", sigval_type);
append_composite_type_field (siginfo_type, "_reason", reason_type);
fbsd_gdbarch_data->siginfo_type = siginfo_type;
return siginfo_type;
}
/* Implement the "gdb_signal_from_target" gdbarch method. */
static enum gdb_signal
fbsd_gdb_signal_from_target (struct gdbarch *gdbarch, int signal)
{
switch (signal)
{
case 0:
return GDB_SIGNAL_0;
case FREEBSD_SIGHUP:
return GDB_SIGNAL_HUP;
case FREEBSD_SIGINT:
return GDB_SIGNAL_INT;
case FREEBSD_SIGQUIT:
return GDB_SIGNAL_QUIT;
case FREEBSD_SIGILL:
return GDB_SIGNAL_ILL;
case FREEBSD_SIGTRAP:
return GDB_SIGNAL_TRAP;
case FREEBSD_SIGABRT:
return GDB_SIGNAL_ABRT;
case FREEBSD_SIGEMT:
return GDB_SIGNAL_EMT;
case FREEBSD_SIGFPE:
return GDB_SIGNAL_FPE;
case FREEBSD_SIGKILL:
return GDB_SIGNAL_KILL;
case FREEBSD_SIGBUS:
return GDB_SIGNAL_BUS;
case FREEBSD_SIGSEGV:
return GDB_SIGNAL_SEGV;
case FREEBSD_SIGSYS:
return GDB_SIGNAL_SYS;
case FREEBSD_SIGPIPE:
return GDB_SIGNAL_PIPE;
case FREEBSD_SIGALRM:
return GDB_SIGNAL_ALRM;
case FREEBSD_SIGTERM:
return GDB_SIGNAL_TERM;
case FREEBSD_SIGURG:
return GDB_SIGNAL_URG;
case FREEBSD_SIGSTOP:
return GDB_SIGNAL_STOP;
case FREEBSD_SIGTSTP:
return GDB_SIGNAL_TSTP;
case FREEBSD_SIGCONT:
return GDB_SIGNAL_CONT;
case FREEBSD_SIGCHLD:
return GDB_SIGNAL_CHLD;
case FREEBSD_SIGTTIN:
return GDB_SIGNAL_TTIN;
case FREEBSD_SIGTTOU:
return GDB_SIGNAL_TTOU;
case FREEBSD_SIGIO:
return GDB_SIGNAL_IO;
case FREEBSD_SIGXCPU:
return GDB_SIGNAL_XCPU;
case FREEBSD_SIGXFSZ:
return GDB_SIGNAL_XFSZ;
case FREEBSD_SIGVTALRM:
return GDB_SIGNAL_VTALRM;
case FREEBSD_SIGPROF:
return GDB_SIGNAL_PROF;
case FREEBSD_SIGWINCH:
return GDB_SIGNAL_WINCH;
case FREEBSD_SIGINFO:
return GDB_SIGNAL_INFO;
case FREEBSD_SIGUSR1:
return GDB_SIGNAL_USR1;
case FREEBSD_SIGUSR2:
return GDB_SIGNAL_USR2;
/* SIGTHR is the same as SIGLWP on FreeBSD. */
case FREEBSD_SIGTHR:
return GDB_SIGNAL_LWP;
case FREEBSD_SIGLIBRT:
return GDB_SIGNAL_LIBRT;
}
if (signal >= FREEBSD_SIGRTMIN && signal <= FREEBSD_SIGRTMAX)
{
int offset = signal - FREEBSD_SIGRTMIN;
return (enum gdb_signal) ((int) GDB_SIGNAL_REALTIME_65 + offset);
}
return GDB_SIGNAL_UNKNOWN;
}
/* Implement the "gdb_signal_to_target" gdbarch method. */
static int
fbsd_gdb_signal_to_target (struct gdbarch *gdbarch,
enum gdb_signal signal)
{
switch (signal)
{
case GDB_SIGNAL_0:
return 0;
case GDB_SIGNAL_HUP:
return FREEBSD_SIGHUP;
case GDB_SIGNAL_INT:
return FREEBSD_SIGINT;
case GDB_SIGNAL_QUIT:
return FREEBSD_SIGQUIT;
case GDB_SIGNAL_ILL:
return FREEBSD_SIGILL;
case GDB_SIGNAL_TRAP:
return FREEBSD_SIGTRAP;
case GDB_SIGNAL_ABRT:
return FREEBSD_SIGABRT;
case GDB_SIGNAL_EMT:
return FREEBSD_SIGEMT;
case GDB_SIGNAL_FPE:
return FREEBSD_SIGFPE;
case GDB_SIGNAL_KILL:
return FREEBSD_SIGKILL;
case GDB_SIGNAL_BUS:
return FREEBSD_SIGBUS;
case GDB_SIGNAL_SEGV:
return FREEBSD_SIGSEGV;
case GDB_SIGNAL_SYS:
return FREEBSD_SIGSYS;
case GDB_SIGNAL_PIPE:
return FREEBSD_SIGPIPE;
case GDB_SIGNAL_ALRM:
return FREEBSD_SIGALRM;
case GDB_SIGNAL_TERM:
return FREEBSD_SIGTERM;
case GDB_SIGNAL_URG:
return FREEBSD_SIGURG;
case GDB_SIGNAL_STOP:
return FREEBSD_SIGSTOP;
case GDB_SIGNAL_TSTP:
return FREEBSD_SIGTSTP;
case GDB_SIGNAL_CONT:
return FREEBSD_SIGCONT;
case GDB_SIGNAL_CHLD:
return FREEBSD_SIGCHLD;
case GDB_SIGNAL_TTIN:
return FREEBSD_SIGTTIN;
case GDB_SIGNAL_TTOU:
return FREEBSD_SIGTTOU;
case GDB_SIGNAL_IO:
return FREEBSD_SIGIO;
case GDB_SIGNAL_XCPU:
return FREEBSD_SIGXCPU;
case GDB_SIGNAL_XFSZ:
return FREEBSD_SIGXFSZ;
case GDB_SIGNAL_VTALRM:
return FREEBSD_SIGVTALRM;
case GDB_SIGNAL_PROF:
return FREEBSD_SIGPROF;
case GDB_SIGNAL_WINCH:
return FREEBSD_SIGWINCH;
case GDB_SIGNAL_INFO:
return FREEBSD_SIGINFO;
case GDB_SIGNAL_USR1:
return FREEBSD_SIGUSR1;
case GDB_SIGNAL_USR2:
return FREEBSD_SIGUSR2;
case GDB_SIGNAL_LWP:
return FREEBSD_SIGTHR;
case GDB_SIGNAL_LIBRT:
return FREEBSD_SIGLIBRT;
}
if (signal >= GDB_SIGNAL_REALTIME_65
&& signal <= GDB_SIGNAL_REALTIME_126)
{
int offset = signal - GDB_SIGNAL_REALTIME_65;
return FREEBSD_SIGRTMIN + offset;
}
return -1;
}
/* Implement the "get_syscall_number" gdbarch method. */
static LONGEST
fbsd_get_syscall_number (struct gdbarch *gdbarch, thread_info *thread)
{
/* FreeBSD doesn't use gdbarch_get_syscall_number since FreeBSD
native targets fetch the system call number from the
'pl_syscall_code' member of struct ptrace_lwpinfo in fbsd_wait.
However, system call catching requires this function to be
set. */
internal_error (__FILE__, __LINE__, _("fbsd_get_sycall_number called"));
}
/* Read an integer symbol value from the current target. */
static LONGEST
fbsd_read_integer_by_name (struct gdbarch *gdbarch, const char *name)
{
bound_minimal_symbol ms = lookup_minimal_symbol (name, NULL, NULL);
if (ms.minsym == NULL)
error (_("Unable to resolve symbol '%s'"), name);
gdb_byte buf[4];
if (target_read_memory (BMSYMBOL_VALUE_ADDRESS (ms), buf, sizeof buf) != 0)
error (_("Unable to read value of '%s'"), name);
return extract_signed_integer (buf, sizeof buf, gdbarch_byte_order (gdbarch));
}
/* Lookup offsets of fields in the runtime linker's 'Obj_Entry'
structure needed to determine the TLS index of an object file. */
static void
fbsd_fetch_rtld_offsets (struct gdbarch *gdbarch, struct fbsd_pspace_data *data)
{
try
{
/* Fetch offsets from debug symbols in rtld. */
struct symbol *obj_entry_sym
= lookup_symbol_in_language ("Struct_Obj_Entry", NULL, STRUCT_DOMAIN,
language_c, NULL).symbol;
if (obj_entry_sym == NULL)
error (_("Unable to find Struct_Obj_Entry symbol"));
data->off_linkmap = lookup_struct_elt (SYMBOL_TYPE(obj_entry_sym),
"linkmap", 0).offset / 8;
data->off_tlsindex = lookup_struct_elt (SYMBOL_TYPE(obj_entry_sym),
"tlsindex", 0).offset / 8;
data->rtld_offsets_valid = true;
return;
}
catch (const gdb_exception_error &e)
{
data->off_linkmap = -1;
}
try
{
/* Fetch offsets from global variables in libthr. Note that
this does not work for single-threaded processes that are not
linked against libthr. */
data->off_linkmap = fbsd_read_integer_by_name (gdbarch,
"_thread_off_linkmap");
data->off_tlsindex = fbsd_read_integer_by_name (gdbarch,
"_thread_off_tlsindex");
data->rtld_offsets_valid = true;
return;
}
catch (const gdb_exception_error &e)
{
data->off_linkmap = -1;
}
}
/* Helper function to read the TLS index of an object file associated
with a link map entry at LM_ADDR. */
static LONGEST
fbsd_get_tls_index (struct gdbarch *gdbarch, CORE_ADDR lm_addr)
{
struct fbsd_pspace_data *data = get_fbsd_pspace_data (current_program_space);
if (!data->rtld_offsets_valid)
fbsd_fetch_rtld_offsets (gdbarch, data);
if (data->off_linkmap == -1)
throw_error (TLS_GENERIC_ERROR,
_("Cannot fetch runtime linker structure offsets"));
/* Simulate container_of to convert from LM_ADDR to the Obj_Entry
pointer and then compute the offset of the tlsindex member. */
CORE_ADDR tlsindex_addr = lm_addr - data->off_linkmap + data->off_tlsindex;
gdb_byte buf[4];
if (target_read_memory (tlsindex_addr, buf, sizeof buf) != 0)
throw_error (TLS_GENERIC_ERROR,
_("Cannot find thread-local variables on this target"));
return extract_signed_integer (buf, sizeof buf, gdbarch_byte_order (gdbarch));
}
/* See fbsd-tdep.h. */
CORE_ADDR
fbsd_get_thread_local_address (struct gdbarch *gdbarch, CORE_ADDR dtv_addr,
CORE_ADDR lm_addr, CORE_ADDR offset)
{
LONGEST tls_index = fbsd_get_tls_index (gdbarch, lm_addr);
gdb_byte buf[gdbarch_ptr_bit (gdbarch) / TARGET_CHAR_BIT];
if (target_read_memory (dtv_addr, buf, sizeof buf) != 0)
throw_error (TLS_GENERIC_ERROR,
_("Cannot find thread-local variables on this target"));
const struct builtin_type *builtin = builtin_type (gdbarch);
CORE_ADDR addr = gdbarch_pointer_to_address (gdbarch,
builtin->builtin_data_ptr, buf);
addr += (tls_index + 1) * TYPE_LENGTH (builtin->builtin_data_ptr);
if (target_read_memory (addr, buf, sizeof buf) != 0)
throw_error (TLS_GENERIC_ERROR,
_("Cannot find thread-local variables on this target"));
addr = gdbarch_pointer_to_address (gdbarch, builtin->builtin_data_ptr, buf);
return addr + offset;
}
/* To be called from GDB_OSABI_FREEBSD handlers. */
void
fbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
set_gdbarch_core_pid_to_str (gdbarch, fbsd_core_pid_to_str);
set_gdbarch_core_thread_name (gdbarch, fbsd_core_thread_name);
set_gdbarch_core_xfer_siginfo (gdbarch, fbsd_core_xfer_siginfo);
set_gdbarch_make_corefile_notes (gdbarch, fbsd_make_corefile_notes);
set_gdbarch_core_info_proc (gdbarch, fbsd_core_info_proc);
set_gdbarch_print_auxv_entry (gdbarch, fbsd_print_auxv_entry);
set_gdbarch_get_siginfo_type (gdbarch, fbsd_get_siginfo_type);
set_gdbarch_gdb_signal_from_target (gdbarch, fbsd_gdb_signal_from_target);
set_gdbarch_gdb_signal_to_target (gdbarch, fbsd_gdb_signal_to_target);
/* `catch syscall' */
set_xml_syscall_file_name (gdbarch, "syscalls/freebsd.xml");
set_gdbarch_get_syscall_number (gdbarch, fbsd_get_syscall_number);
}
void
_initialize_fbsd_tdep (void)
{
fbsd_gdbarch_data_handle =
gdbarch_data_register_post_init (init_fbsd_gdbarch_data);
}
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