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f6ac5f3d63
I.e., use C++ virtual methods and inheritance instead of tables of
function pointers.
Unfortunately, there's no way to do a smooth transition. ALL native
targets in the tree must be converted at the same time. I've tested
all I could with cross compilers and with help from GCC compile farm,
but naturally I haven't been able to test many of the ports. Still, I
made a best effort to port everything over, and while I expect some
build problems due to typos and such, which should be trivial to fix,
I don't expect any design problems.
* Implementation notes:
- The flattened current_target is gone. References to current_target
or current_target.beneath are replaced with references to
target_stack (the top of the stack) directly.
- To keep "set debug target" working, this adds a new debug_stratum
layer that sits on top of the stack, prints the debug, and delegates
to the target beneath.
In addition, this makes the shortname and longname properties of
target_ops be virtual methods instead of data fields, and makes the
debug target defer those to the target beneath. This is so that
debug code sprinkled around that does "if (debugtarget) ..." can
transparently print the name of the target beneath.
A patch later in the series actually splits out the
shortname/longname methods to a separate structure, but I preferred
to keep that chance separate as it is associated with changing a bit
the design of how targets are registered and open.
- Since you can't check whether a C++ virtual method is overridden,
the old method of checking whether a target_ops implements a method
by comparing the function pointer must be replaced with something
else.
Some cases are fixed by adding a parallel "can_do_foo" target_ops
methods. E.g.,:
+ for (t = target_stack; t != NULL; t = t->beneath)
{
- if (t->to_create_inferior != NULL)
+ if (t->can_create_inferior ())
break;
}
Others are fixed by changing void return type to bool or int return
type, and have the default implementation return false or -1, to
indicate lack of support.
- make-target-delegates was adjusted to generate C++ classes and
methods.
It needed tweaks to grok "virtual" in front of the target method
name, and for the fact that methods are no longer function pointers.
(In particular, the current code parsing the return type was simple
because it could simply parse up until the '(' in '(*to_foo)'.
It now generates a couple C++ classes that inherit target_ops:
dummy_target and debug_target.
Since we need to generate the class declarations as well, i.e., we
need to emit methods twice, we now generate the code in two passes.
- The core_target global is renamed to avoid conflict with the
"core_target" class.
- ctf/tfile targets
init_tracefile_ops is replaced by a base class that is inherited by
both ctf and tfile.
- bsd-uthread
The bsd_uthread_ops_hack hack is gone. It's not needed because
nothing was extending a target created by bsd_uthread_target.
- remote/extended-remote targets
This is a first pass, just enough to C++ify target_ops.
A later pass will convert more free functions to methods, and make
remote_state be truly per remote instance, allowing multiple
simultaneous instances of remote targets.
- inf-child/"native" is converted to an actual base class
(inf_child_target), that is inherited by all native targets.
- GNU/Linux
The old weird double-target linux_ops mechanism in linux-nat.c, is
gone, replaced by adding a few virtual methods to linux-nat.h's
target_ops, called low_XXX, that the concrete linux-nat
implementations override. Sort of like gdbserver's
linux_target_ops, but simpler, for requiring only one
target_ops-like hierarchy, which spares implementing the same method
twice when we need to forward the method to a low implementation.
The low target simply reimplements the target_ops method directly in
that case.
There are a few remaining linux-nat.c hooks that would be better
converted to low_ methods like above too. E.g.:
linux_nat_set_new_thread (t, x86_linux_new_thread);
linux_nat_set_new_fork (t, x86_linux_new_fork);
linux_nat_set_forget_process
That'll be done in a follow up patch.
- We can no longer use functions like x86_use_watchpoints to install
custom methods on an arbitrary base target.
The patch replaces instances of such a pattern with template mixins.
For example memory_breakpoint_target defined in target.h, or
x86_nat_target in x86-nat.h.
- linux_trad_target, MIPS and Alpha GNU/Linux
The code in the new linux-nat-trad.h/c files which was split off of
inf-ptrace.h/c recently, is converted to a C++ base class, and used
by the MIPS and Alpha GNU/Linux ports.
- BSD targets
The
$architecture x NetBSD/OpenBSD/FreeBSD
support matrix complicates things a bit. There's common BSD target
code, and there's common architecture-specific code shared between
the different BSDs. Currently, all that is stiched together to form
a final target, via the i386bsd_target, x86bsd_target,
fbsd_nat_add_target functions etc.
This introduces new fbsd_nat_target, obsd_nat_target and
nbsd_nat_target classes that serve as base/prototype target for the
corresponding BSD variant.
And introduces generic i386/AMD64 BSD targets, to be used as
template mixin to build a final target. Similarly, a generic SPARC
target is added, used by both BSD and Linux ports.
- bsd_kvm_add_target, BSD libkvm target
I considered making bsd_kvm_supply_pcb a virtual method, and then
have each port inherit bsd_kvm_target and override that method, but
that was resulting in lots of unjustified churn, so I left the
function pointer mechanism alone.
gdb/ChangeLog:
2018-05-02 Pedro Alves <palves@redhat.com>
John Baldwin <jhb@freebsd.org>
* target.h (enum strata) <debug_stratum>: New.
(struct target_ops) <all delegation methods>: Replace by C++
virtual methods, and drop "to_" prefix. All references updated
throughout.
<to_shortname, to_longname, to_doc, to_data,
to_have_steppable_watchpoint, to_have_continuable_watchpoint,
to_has_thread_control, to_attach_no_wait>: Delete, replaced by
virtual methods. All references updated throughout.
<can_attach, supports_terminal_ours, can_create_inferior,
get_thread_control_capabilities, attach_no_wait>: New
virtual methods.
<insert_breakpoint, remove_breakpoint>: Now
TARGET_DEFAULT_NORETURN methods.
<info_proc>: Now returns bool.
<to_magic>: Delete.
(OPS_MAGIC): Delete.
(current_target): Delete. All references replaced by references
to ...
(target_stack): ... this. New.
(target_shortname, target_longname): Adjust.
(target_can_run): Now a function declaration.
(default_child_has_all_memory, default_child_has_memory)
(default_child_has_stack, default_child_has_registers)
(default_child_has_execution): Remove target_ops parameter.
(complete_target_initialization): Delete.
(memory_breakpoint_target): New template class.
(test_target_ops): Refactor as a C++ class with virtual methods.
* make-target-delegates (NAME_PART): Tighten.
(POINTER_PART, CP_SYMBOL): New.
(SIMPLE_RETURN_PART): Reimplement.
(VEC_RETURN_PART): Expect less.
(RETURN_PART, VIRTUAL_PART): New.
(METHOD): Adjust to C++ virtual methods.
(scan_target_h): Remove reference to C99.
(dname): Output "target_ops::" prefix.
(write_function_header): Adjust to output a C++ class method.
(write_declaration): New.
(write_delegator): Adjust to output a C++ class method.
(tdname): Output "dummy_target::" prefix.
(write_tdefault, write_debugmethod): Adjust to output a C++ class
method.
(tdefault_names, debug_names): Delete.
(return_types, tdefaults, styles, argtypes_array): New.
(top level): All methods are delegators.
(print_class): New.
(top level): Print dummy_target and debug_target classes.
* target-delegates.c: Regenerate.
* target-debug.h (target_debug_print_enum_info_proc_what)
(target_debug_print_thread_control_capabilities)
(target_debug_print_thread_info_p): New.
* target.c (dummy_target): Delete.
(the_dummy_target, the_debug_target): New.
(target_stack): Now extern.
(set_targetdebug): Push/unpush debug target.
(default_child_has_all_memory, default_child_has_memory)
(default_child_has_stack, default_child_has_registers)
(default_child_has_execution): Remove target_ops parameter.
(complete_target_initialization): Delete.
(add_target_with_completer): No longer call
complete_target_initialization.
(target_supports_terminal_ours): Use regular delegation.
(update_current_target): Delete.
(push_target): No longer check magic number. Don't call
update_current_target.
(unpush_target): Don't call update_current_target.
(target_is_pushed): No longer check magic number.
(target_require_runnable): Skip for all stratums over
process_stratum.
(target_ops::info_proc): New.
(target_info_proc): Use find_target_at and
find_default_run_target.
(target_supports_disable_randomization): Use regular delegation.
(target_get_osdata): Use find_target_at.
(target_ops::open, target_ops::close, target_ops::can_attach)
(target_ops::attach, target_ops::can_create_inferior)
(target_ops::create_inferior, target_ops::can_run)
(target_can_run): New.
(default_fileio_target): Use regular delegation.
(target_ops::fileio_open, target_ops::fileio_pwrite)
(target_ops::fileio_pread, target_ops::fileio_fstat)
(target_ops::fileio_close, target_ops::fileio_unlink)
(target_ops::fileio_readlink): New.
(target_fileio_open_1, target_fileio_unlink)
(target_fileio_readlink): Always call the target method. Handle
FILEIO_ENOSYS.
(return_zero, return_zero_has_execution): Delete.
(init_dummy_target): Delete.
(dummy_target::dummy_target, dummy_target::shortname)
(dummy_target::longname, dummy_target::doc)
(debug_target::debug_target, debug_target::shortname)
(debug_target::longname, debug_target::doc): New.
(target_supports_delete_record): Use regular delegation.
(setup_target_debug): Delete.
(maintenance_print_target_stack): Skip debug_stratum.
(initialize_targets): Instantiate the_dummy_target and
the_debug_target.
* auxv.c (target_auxv_parse): Remove 'ops' parameter. Adjust to
use target_stack.
(target_auxv_search, fprint_target_auxv): Adjust.
(info_auxv_command): Adjust to use target_stack.
* auxv.h (target_auxv_parse): Remove 'ops' parameter.
* exceptions.c (print_flush): Handle a NULL target_stack.
* regcache.c (target_ops_no_register): Refactor as class with
virtual methods.
* exec.c (exec_target): New class.
(exec_ops): Now an exec_target.
(exec_open, exec_close_1, exec_get_section_table)
(exec_xfer_partial, exec_files_info, exec_has_memory)
(exec_make_note_section): Refactor as exec_target methods.
(exec_file_clear, ignore, exec_remove_breakpoint, init_exec_ops):
Delete.
(exec_target::find_memory_regions): New.
(_initialize_exec): Don't call init_exec_ops.
* gdbcore.h (exec_file_clear): Delete.
* corefile.c (core_target): Delete.
(core_file_command): Adjust.
* corelow.c (core_target): New class.
(the_core_target): New.
(core_close): Remove target_ops parameter.
(core_close_cleanup): Adjust.
(core_target::close): New.
(core_open, core_detach, get_core_registers, core_files_info)
(core_xfer_partial, core_thread_alive, core_read_description)
(core_pid_to_str, core_thread_name, core_has_memory)
(core_has_stack, core_has_registers, core_info_proc): Rework as
core_target methods.
(ignore, core_remove_breakpoint, init_core_ops): Delete.
(_initialize_corelow): Initialize the_core_target.
* gdbcore.h (core_target): Delete.
(the_core_target): New.
* ctf.c: (ctf_target): New class.
(ctf_ops): Now a ctf_target.
(ctf_open, ctf_close, ctf_files_info, ctf_fetch_registers)
(ctf_xfer_partial, ctf_get_trace_state_variable_value)
(ctf_trace_find, ctf_traceframe_info): Refactor as ctf_target
methods.
(init_ctf_ops): Delete.
(_initialize_ctf): Don't call it.
* tracefile-tfile.c (tfile_target): New class.
(tfile_ops): Now a tfile_target.
(tfile_open, tfile_close, tfile_files_info)
(tfile_get_tracepoint_status, tfile_trace_find)
(tfile_fetch_registers, tfile_xfer_partial)
(tfile_get_trace_state_variable_value, tfile_traceframe_info):
Refactor as tfile_target methods.
(tfile_xfer_partial_features): Remove target_ops parameter.
(init_tfile_ops): Delete.
(_initialize_tracefile_tfile): Don't call it.
* tracefile.c (tracefile_has_all_memory, tracefile_has_memory)
(tracefile_has_stack, tracefile_has_registers)
(tracefile_thread_alive, tracefile_get_trace_status): Refactor as
tracefile_target methods.
(init_tracefile_ops): Delete.
(tracefile_target::tracefile_target): New.
* tracefile.h: Include "target.h".
(tracefile_target): New class.
(init_tracefile_ops): Delete.
* spu-multiarch.c (spu_multiarch_target): New class.
(spu_ops): Now a spu_multiarch_target.
(spu_thread_architecture, spu_region_ok_for_hw_watchpoint)
(spu_fetch_registers, spu_store_registers, spu_xfer_partial)
(spu_search_memory, spu_mourn_inferior): Refactor as
spu_multiarch_target methods.
(init_spu_ops): Delete.
(_initialize_spu_multiarch): Remove references to init_spu_ops,
complete_target_initialization.
* ravenscar-thread.c (ravenscar_thread_target): New class.
(ravenscar_ops): Now a ravenscar_thread_target.
(ravenscar_resume, ravenscar_wait, ravenscar_update_thread_list)
(ravenscar_thread_alive, ravenscar_pid_to_str)
(ravenscar_fetch_registers, ravenscar_store_registers)
(ravenscar_prepare_to_store, ravenscar_stopped_by_sw_breakpoint)
(ravenscar_stopped_by_hw_breakpoint)
(ravenscar_stopped_by_watchpoint, ravenscar_stopped_data_address)
(ravenscar_mourn_inferior, ravenscar_core_of_thread)
(ravenscar_get_ada_task_ptid): Refactor as ravenscar_thread_target
methods.
(init_ravenscar_thread_ops): Delete.
(_initialize_ravenscar): Remove references to
init_ravenscar_thread_ops and complete_target_initialization.
* bsd-uthread.c (bsd_uthread_ops_hack): Delete.
(bsd_uthread_target): New class.
(bsd_uthread_ops): Now a bsd_uthread_target.
(bsd_uthread_activate): Adjust to refer to bsd_uthread_ops.
(bsd_uthread_close, bsd_uthread_mourn_inferior)
(bsd_uthread_fetch_registers, bsd_uthread_store_registers)
(bsd_uthread_wait, bsd_uthread_resume, bsd_uthread_thread_alive)
(bsd_uthread_update_thread_list, bsd_uthread_extra_thread_info)
(bsd_uthread_pid_to_str): Refactor as bsd_uthread_target methods.
(bsd_uthread_target): Delete function.
(_initialize_bsd_uthread): Remove reference to
complete_target_initialization.
* bfd-target.c (target_bfd_data): Delete. Fields folded into ...
(target_bfd): ... this new class.
(target_bfd_xfer_partial, target_bfd_get_section_table)
(target_bfd_close): Refactor as target_bfd methods.
(target_bfd::~target_bfd): New.
(target_bfd_reopen): Adjust.
(target_bfd::close): New.
* record-btrace.c (record_btrace_target): New class.
(record_btrace_ops): Now a record_btrace_target.
(record_btrace_open, record_btrace_stop_recording)
(record_btrace_disconnect, record_btrace_close)
(record_btrace_async, record_btrace_info)
(record_btrace_insn_history, record_btrace_insn_history_range)
(record_btrace_insn_history_from, record_btrace_call_history)
(record_btrace_call_history_range)
(record_btrace_call_history_from, record_btrace_record_method)
(record_btrace_is_replaying, record_btrace_will_replay)
(record_btrace_xfer_partial, record_btrace_insert_breakpoint)
(record_btrace_remove_breakpoint, record_btrace_fetch_registers)
(record_btrace_store_registers, record_btrace_prepare_to_store)
(record_btrace_to_get_unwinder)
(record_btrace_to_get_tailcall_unwinder, record_btrace_resume)
(record_btrace_commit_resume, record_btrace_wait)
(record_btrace_stop, record_btrace_can_execute_reverse)
(record_btrace_stopped_by_sw_breakpoint)
(record_btrace_supports_stopped_by_sw_breakpoint)
(record_btrace_stopped_by_hw_breakpoint)
(record_btrace_supports_stopped_by_hw_breakpoint)
(record_btrace_update_thread_list, record_btrace_thread_alive)
(record_btrace_goto_begin, record_btrace_goto_end)
(record_btrace_goto, record_btrace_stop_replaying_all)
(record_btrace_execution_direction)
(record_btrace_prepare_to_generate_core)
(record_btrace_done_generating_core): Refactor as
record_btrace_target methods.
(init_record_btrace_ops): Delete.
(_initialize_record_btrace): Remove reference to
init_record_btrace_ops.
* record-full.c (RECORD_FULL_IS_REPLAY): Adjust to always refer to
the execution_direction global.
(record_full_base_target, record_full_target)
(record_full_core_target): New classes.
(record_full_ops): Now a record_full_target.
(record_full_core_ops): Now a record_full_core_target.
(record_full_target::detach, record_full_target::disconnect)
(record_full_core_target::disconnect)
(record_full_target::mourn_inferior, record_full_target::kill):
New.
(record_full_open, record_full_close, record_full_async): Refactor
as methods of the record_full_base_target class.
(record_full_resume, record_full_commit_resume): Refactor
as methods of the record_full_target class.
(record_full_wait, record_full_stopped_by_watchpoint)
(record_full_stopped_data_address)
(record_full_stopped_by_sw_breakpoint)
(record_full_supports_stopped_by_sw_breakpoint)
(record_full_stopped_by_hw_breakpoint)
(record_full_supports_stopped_by_hw_breakpoint): Refactor as
methods of the record_full_base_target class.
(record_full_store_registers, record_full_xfer_partial)
(record_full_insert_breakpoint, record_full_remove_breakpoint):
Refactor as methods of the record_full_target class.
(record_full_can_execute_reverse, record_full_get_bookmark)
(record_full_goto_bookmark, record_full_execution_direction)
(record_full_record_method, record_full_info, record_full_delete)
(record_full_is_replaying, record_full_will_replay)
(record_full_goto_begin, record_full_goto_end, record_full_goto)
(record_full_stop_replaying): Refactor as methods of the
record_full_base_target class.
(record_full_core_resume, record_full_core_kill)
(record_full_core_fetch_registers)
(record_full_core_prepare_to_store)
(record_full_core_store_registers, record_full_core_xfer_partial)
(record_full_core_insert_breakpoint)
(record_full_core_remove_breakpoint)
(record_full_core_has_execution): Refactor
as methods of the record_full_core_target class.
(record_full_base_target::supports_delete_record): New.
(init_record_full_ops): Delete.
(init_record_full_core_ops): Delete.
(record_full_save): Refactor as method of the
record_full_base_target class.
(_initialize_record_full): Remove references to
init_record_full_ops and init_record_full_core_ops.
* remote.c (remote_target, extended_remote_target): New classes.
(remote_ops): Now a remote_target.
(extended_remote_ops): Now an extended_remote_target.
(remote_insert_fork_catchpoint, remote_remove_fork_catchpoint)
(remote_insert_vfork_catchpoint, remote_remove_vfork_catchpoint)
(remote_insert_exec_catchpoint, remote_remove_exec_catchpoint)
(remote_pass_signals, remote_set_syscall_catchpoint)
(remote_program_signals, )
(remote_thread_always_alive): Remove target_ops parameter.
(remote_thread_alive, remote_thread_name)
(remote_update_thread_list, remote_threads_extra_info)
(remote_static_tracepoint_marker_at)
(remote_static_tracepoint_markers_by_strid)
(remote_get_ada_task_ptid, remote_close, remote_start_remote)
(remote_open): Refactor as methods of remote_target.
(extended_remote_open, extended_remote_detach)
(extended_remote_attach, extended_remote_post_attach):
(extended_remote_supports_disable_randomization)
(extended_remote_create_inferior): : Refactor as method of
extended_remote_target.
(remote_set_permissions, remote_open_1, remote_detach)
(remote_follow_fork, remote_follow_exec, remote_disconnect)
(remote_resume, remote_commit_resume, remote_stop)
(remote_interrupt, remote_pass_ctrlc, remote_terminal_inferior)
(remote_terminal_ours, remote_wait, remote_fetch_registers)
(remote_prepare_to_store, remote_store_registers)
(remote_flash_erase, remote_flash_done, remote_files_info)
(remote_kill, remote_mourn, remote_insert_breakpoint)
(remote_remove_breakpoint, remote_insert_watchpoint)
(remote_watchpoint_addr_within_range)
(remote_remove_watchpoint, remote_region_ok_for_hw_watchpoint)
(remote_check_watch_resources, remote_stopped_by_sw_breakpoint)
(remote_supports_stopped_by_sw_breakpoint)
(remote_stopped_by_hw_breakpoint)
(remote_supports_stopped_by_hw_breakpoint)
(remote_stopped_by_watchpoint, remote_stopped_data_address)
(remote_insert_hw_breakpoint, remote_remove_hw_breakpoint)
(remote_verify_memory): Refactor as methods of remote_target.
(remote_write_qxfer, remote_read_qxfer): Remove target_ops
parameter.
(remote_xfer_partial, remote_get_memory_xfer_limit)
(remote_search_memory, remote_rcmd, remote_memory_map)
(remote_pid_to_str, remote_get_thread_local_address)
(remote_get_tib_address, remote_read_description): Refactor as
methods of remote_target.
(remote_target::fileio_open, remote_target::fileio_pwrite)
(remote_target::fileio_pread, remote_target::fileio_close): New.
(remote_hostio_readlink, remote_hostio_fstat)
(remote_filesystem_is_local, remote_can_execute_reverse)
(remote_supports_non_stop, remote_supports_disable_randomization)
(remote_supports_multi_process, remote_supports_cond_breakpoints)
(remote_supports_enable_disable_tracepoint)
(remote_supports_string_tracing)
(remote_can_run_breakpoint_commands, remote_trace_init)
(remote_download_tracepoint, remote_can_download_tracepoint)
(remote_download_trace_state_variable, remote_enable_tracepoint)
(remote_disable_tracepoint, remote_trace_set_readonly_regions)
(remote_trace_start, remote_get_trace_status)
(remote_get_tracepoint_status, remote_trace_stop)
(remote_trace_find, remote_get_trace_state_variable_value)
(remote_save_trace_data, remote_get_raw_trace_data)
(remote_set_disconnected_tracing, remote_core_of_thread)
(remote_set_circular_trace_buffer, remote_traceframe_info)
(remote_get_min_fast_tracepoint_insn_len)
(remote_set_trace_buffer_size, remote_set_trace_notes)
(remote_use_agent, remote_can_use_agent, remote_enable_btrace)
(remote_disable_btrace, remote_teardown_btrace)
(remote_read_btrace, remote_btrace_conf)
(remote_augmented_libraries_svr4_read, remote_load)
(remote_pid_to_exec_file, remote_can_do_single_step)
(remote_execution_direction, remote_thread_handle_to_thread_info):
Refactor as methods of remote_target.
(init_remote_ops, init_extended_remote_ops): Delete.
(remote_can_async_p, remote_is_async_p, remote_async)
(remote_thread_events, remote_upload_tracepoints)
(remote_upload_trace_state_variables): Refactor as methods of
remote_target.
(_initialize_remote): Remove references to init_remote_ops and
init_extended_remote_ops.
* remote-sim.c (gdbsim_target): New class.
(gdbsim_fetch_register, gdbsim_store_register, gdbsim_kill)
(gdbsim_load, gdbsim_create_inferior, gdbsim_open, gdbsim_close)
(gdbsim_detach, gdbsim_resume, gdbsim_interrupt)
(gdbsim_wait, gdbsim_prepare_to_store, gdbsim_xfer_partial)
(gdbsim_files_info, gdbsim_mourn_inferior, gdbsim_thread_alive)
(gdbsim_pid_to_str, gdbsim_has_all_memory, gdbsim_has_memory):
Refactor as methods of gdbsim_target.
(gdbsim_ops): Now a gdbsim_target.
(init_gdbsim_ops): Delete.
(gdbsim_cntrl_c): Adjust.
(_initialize_remote_sim): Remove reference to init_gdbsim_ops.
* amd64-linux-nat.c (amd64_linux_nat_target): New class.
(the_amd64_linux_nat_target): New.
(amd64_linux_fetch_inferior_registers)
(amd64_linux_store_inferior_registers): Refactor as methods of
amd64_linux_nat_target.
(_initialize_amd64_linux_nat): Adjust. Set linux_target.
* i386-linux-nat.c: Don't include "linux-nat.h".
(i386_linux_nat_target): New class.
(the_i386_linux_nat_target): New.
(i386_linux_fetch_inferior_registers)
(i386_linux_store_inferior_registers, i386_linux_resume): Refactor
as methods of i386_linux_nat_target.
(_initialize_i386_linux_nat): Adjust. Set linux_target.
* inf-child.c (inf_child_ops): Delete.
(inf_child_fetch_inferior_registers)
(inf_child_store_inferior_registers): Delete.
(inf_child_post_attach, inf_child_prepare_to_store): Refactor as
methods of inf_child_target.
(inf_child_target::supports_terminal_ours)
(inf_child_target::terminal_init)
(inf_child_target::terminal_inferior)
(inf_child_target::terminal_ours_for_output)
(inf_child_target::terminal_ours, inf_child_target::interrupt)
(inf_child_target::pass_ctrlc, inf_child_target::terminal_info):
New.
(inf_child_open, inf_child_disconnect, inf_child_close)
(inf_child_mourn_inferior, inf_child_maybe_unpush_target)
(inf_child_post_startup_inferior, inf_child_can_run)
(inf_child_pid_to_exec_file): Refactor as methods of
inf_child_target.
(inf_child_follow_fork): Delete.
(inf_child_target::can_create_inferior)
(inf_child_target::can_attach): New.
(inf_child_target::has_all_memory, inf_child_target::has_memory)
(inf_child_target::has_stack, inf_child_target::has_registers)
(inf_child_target::has_execution): New.
(inf_child_fileio_open, inf_child_fileio_pwrite)
(inf_child_fileio_pread, inf_child_fileio_fstat)
(inf_child_fileio_close, inf_child_fileio_unlink)
(inf_child_fileio_readlink, inf_child_use_agent)
(inf_child_can_use_agent): Refactor as methods of
inf_child_target.
(return_zero, inf_child_target): Delete.
(inf_child_target::inf_child_target): New.
* inf-child.h: Include "target.h".
(inf_child_target): Delete function prototype.
(inf_child_target): New class.
(inf_child_open_target, inf_child_mourn_inferior)
(inf_child_maybe_unpush_target): Delete.
* inf-ptrace.c (inf_ptrace_target::~inf_ptrace_target): New.
(inf_ptrace_follow_fork, inf_ptrace_insert_fork_catchpoint)
(inf_ptrace_remove_fork_catchpoint, inf_ptrace_create_inferior)
(inf_ptrace_post_startup_inferior, inf_ptrace_mourn_inferior)
(inf_ptrace_attach, inf_ptrace_post_attach, inf_ptrace_detach)
(inf_ptrace_detach_success, inf_ptrace_kill, inf_ptrace_resume)
(inf_ptrace_wait, inf_ptrace_xfer_partial)
(inf_ptrace_thread_alive, inf_ptrace_files_info)
(inf_ptrace_pid_to_str, inf_ptrace_auxv_parse): Refactor as
methods of inf_ptrace_target.
(inf_ptrace_target): Delete function.
* inf-ptrace.h: Include "inf-child.h".
(inf_ptrace_target): Delete function declaration.
(inf_ptrace_target): New class.
(inf_ptrace_trad_target, inf_ptrace_detach_success): Delete.
* linux-nat.c (linux_target): New.
(linux_ops, linux_ops_saved, super_xfer_partial): Delete.
(linux_nat_target::~linux_nat_target): New.
(linux_child_post_attach, linux_child_post_startup_inferior)
(linux_child_follow_fork, linux_child_insert_fork_catchpoint)
(linux_child_remove_fork_catchpoint)
(linux_child_insert_vfork_catchpoint)
(linux_child_remove_vfork_catchpoint)
(linux_child_insert_exec_catchpoint)
(linux_child_remove_exec_catchpoint)
(linux_child_set_syscall_catchpoint, linux_nat_pass_signals)
(linux_nat_create_inferior, linux_nat_attach, linux_nat_detach)
(linux_nat_resume, linux_nat_stopped_by_watchpoint)
(linux_nat_stopped_data_address)
(linux_nat_stopped_by_sw_breakpoint)
(linux_nat_supports_stopped_by_sw_breakpoint)
(linux_nat_stopped_by_hw_breakpoint)
(linux_nat_supports_stopped_by_hw_breakpoint, linux_nat_wait)
(linux_nat_kill, linux_nat_mourn_inferior)
(linux_nat_xfer_partial, linux_nat_thread_alive)
(linux_nat_update_thread_list, linux_nat_pid_to_str)
(linux_nat_thread_name, linux_child_pid_to_exec_file)
(linux_child_static_tracepoint_markers_by_strid)
(linux_nat_is_async_p, linux_nat_can_async_p)
(linux_nat_supports_non_stop, linux_nat_always_non_stop_p)
(linux_nat_supports_multi_process)
(linux_nat_supports_disable_randomization, linux_nat_async)
(linux_nat_stop, linux_nat_close, linux_nat_thread_address_space)
(linux_nat_core_of_thread, linux_nat_filesystem_is_local)
(linux_nat_fileio_open, linux_nat_fileio_readlink)
(linux_nat_fileio_unlink, linux_nat_thread_events): Refactor as
methods of linux_nat_target.
(linux_nat_wait_1, linux_xfer_siginfo, linux_proc_xfer_partial)
(linux_proc_xfer_spu, linux_nat_xfer_osdata): Remove target_ops
parameter.
(check_stopped_by_watchpoint): Adjust.
(linux_xfer_partial): Delete.
(linux_target_install_ops, linux_target, linux_nat_add_target):
Delete.
(linux_nat_target::linux_nat_target): New.
* linux-nat.h: Include "inf-ptrace.h".
(linux_nat_target): New.
(linux_target, linux_target_install_ops, linux_nat_add_target):
Delete function declarations.
(linux_target): Declare global.
* linux-thread-db.c (thread_db_target): New.
(thread_db_target::thread_db_target): New.
(thread_db_ops): Delete.
(the_thread_db_target): New.
(thread_db_detach, thread_db_wait, thread_db_mourn_inferior)
(thread_db_update_thread_list, thread_db_pid_to_str)
(thread_db_extra_thread_info)
(thread_db_thread_handle_to_thread_info)
(thread_db_get_thread_local_address, thread_db_get_ada_task_ptid)
(thread_db_resume): Refactor as methods of thread_db_target.
(init_thread_db_ops): Delete.
(_initialize_thread_db): Remove reference to init_thread_db_ops.
* x86-linux-nat.c: Don't include "linux-nat.h".
(super_post_startup_inferior): Delete.
(x86_linux_nat_target::~x86_linux_nat_target): New.
(x86_linux_child_post_startup_inferior)
(x86_linux_read_description, x86_linux_enable_btrace)
(x86_linux_disable_btrace, x86_linux_teardown_btrace)
(x86_linux_read_btrace, x86_linux_btrace_conf): Refactor as
methods of x86_linux_nat_target.
(x86_linux_create_target): Delete. Bits folded ...
(x86_linux_add_target): ... here. Now takes a linux_nat_target
pointer.
* x86-linux-nat.h: Include "linux-nat.h" and "x86-nat.h".
(x86_linux_nat_target): New class.
(x86_linux_create_target): Delete.
(x86_linux_add_target): Now takes a linux_nat_target pointer.
* x86-nat.c (x86_insert_watchpoint, x86_remove_watchpoint)
(x86_region_ok_for_watchpoint, x86_stopped_data_address)
(x86_stopped_by_watchpoint, x86_insert_hw_breakpoint)
(x86_remove_hw_breakpoint, x86_can_use_hw_breakpoint)
(x86_stopped_by_hw_breakpoint): Remove target_ops parameter and
make extern.
(x86_use_watchpoints): Delete.
* x86-nat.h: Include "breakpoint.h" and "target.h".
(x86_use_watchpoints): Delete.
(x86_can_use_hw_breakpoint, x86_region_ok_for_hw_watchpoint)
(x86_stopped_by_watchpoint, x86_stopped_data_address)
(x86_insert_watchpoint, x86_remove_watchpoint)
(x86_insert_hw_breakpoint, x86_remove_hw_breakpoint)
(x86_stopped_by_hw_breakpoint): New declarations.
(x86_nat_target): New template class.
* ppc-linux-nat.c (ppc_linux_nat_target): New class.
(the_ppc_linux_nat_target): New.
(ppc_linux_fetch_inferior_registers)
(ppc_linux_can_use_hw_breakpoint)
(ppc_linux_region_ok_for_hw_watchpoint)
(ppc_linux_ranged_break_num_registers)
(ppc_linux_insert_hw_breakpoint, ppc_linux_remove_hw_breakpoint)
(ppc_linux_insert_mask_watchpoint)
(ppc_linux_remove_mask_watchpoint)
(ppc_linux_can_accel_watchpoint_condition)
(ppc_linux_insert_watchpoint, ppc_linux_remove_watchpoint)
(ppc_linux_stopped_data_address, ppc_linux_stopped_by_watchpoint)
(ppc_linux_watchpoint_addr_within_range)
(ppc_linux_masked_watch_num_registers)
(ppc_linux_store_inferior_registers, ppc_linux_auxv_parse)
(ppc_linux_read_description): Refactor as methods of
ppc_linux_nat_target.
(_initialize_ppc_linux_nat): Adjust. Set linux_target.
* procfs.c (procfs_xfer_partial): Delete forward declaration.
(procfs_target): New class.
(the_procfs_target): New.
(procfs_target): Delete function.
(procfs_auxv_parse, procfs_attach, procfs_detach)
(procfs_fetch_registers, procfs_store_registers, procfs_wait)
(procfs_xfer_partial, procfs_resume, procfs_pass_signals)
(procfs_files_info, procfs_kill_inferior, procfs_mourn_inferior)
(procfs_create_inferior, procfs_update_thread_list)
(procfs_thread_alive, procfs_pid_to_str)
(procfs_can_use_hw_breakpoint, procfs_stopped_by_watchpoint)
(procfs_stopped_data_address, procfs_insert_watchpoint)
(procfs_remove_watchpoint, procfs_region_ok_for_hw_watchpoint)
(proc_find_memory_regions, procfs_info_proc)
(procfs_make_note_section): Refactor as methods of procfs_target.
(_initialize_procfs): Adjust.
* sol-thread.c (sol_thread_target): New class.
(sol_thread_ops): Now a sol_thread_target.
(sol_thread_detach, sol_thread_resume, sol_thread_wait)
(sol_thread_fetch_registers, sol_thread_store_registers)
(sol_thread_xfer_partial, sol_thread_mourn_inferior)
(sol_thread_alive, solaris_pid_to_str, sol_update_thread_list)
(sol_get_ada_task_ptid): Refactor as methods of sol_thread_target.
(init_sol_thread_ops): Delete.
(_initialize_sol_thread): Adjust. Remove references to
init_sol_thread_ops and complete_target_initialization.
* windows-nat.c (windows_nat_target): New class.
(windows_fetch_inferior_registers)
(windows_store_inferior_registers, windows_resume, windows_wait)
(windows_attach, windows_detach, windows_pid_to_exec_file)
(windows_files_info, windows_create_inferior)
(windows_mourn_inferior, windows_interrupt, windows_kill_inferior)
(windows_close, windows_pid_to_str, windows_xfer_partial)
(windows_get_tib_address, windows_get_ada_task_ptid)
(windows_thread_name, windows_thread_alive): Refactor as
windows_nat_target methods.
(do_initial_windows_stuff): Adjust.
(windows_target): Delete function.
(_initialize_windows_nat): Adjust.
* darwin-nat.c (darwin_resume, darwin_wait_to, darwin_interrupt)
(darwin_mourn_inferior, darwin_kill_inferior)
(darwin_create_inferior, darwin_attach, darwin_detach)
(darwin_pid_to_str, darwin_thread_alive, darwin_xfer_partial)
(darwin_pid_to_exec_file, darwin_get_ada_task_ptid)
(darwin_supports_multi_process): Refactor as darwin_nat_target
methods.
(darwin_resume_to, darwin_files_info): Delete.
(_initialize_darwin_inferior): Rename to ...
(_initialize_darwin_nat): ... this. Adjust to C++ification.
* darwin-nat.h: Include "inf-child.h".
(darwin_nat_target): New class.
(darwin_complete_target): Delete.
* i386-darwin-nat.c (i386_darwin_nat_target): New class.
(darwin_target): New.
(i386_darwin_fetch_inferior_registers)
(i386_darwin_store_inferior_registers): Refactor as methods of
darwin_nat_target.
(darwin_complete_target): Delete, with ...
(_initialize_i386_darwin_nat): ... bits factored out here.
* alpha-linux-nat.c (alpha_linux_nat_target): New class.
(the_alpha_linux_nat_target): New.
(alpha_linux_register_u_offset): Refactor as
alpha_linux_nat_target method.
(_initialize_alpha_linux_nat): Adjust.
* linux-nat-trad.c (inf_ptrace_register_u_offset): Delete.
(inf_ptrace_fetch_register, inf_ptrace_fetch_registers)
(inf_ptrace_store_register, inf_ptrace_store_registers): Refact as
methods of linux_nat_trad_target.
(linux_trad_target): Delete.
* linux-nat-trad.h (linux_trad_target): Delete function.
(linux_nat_trad_target): New class.
* mips-linux-nat.c (mips_linux_nat_target): New class.
(super_fetch_registers, super_store_registers, super_close):
Delete.
(the_mips_linux_nat_target): New.
(mips64_linux_regsets_fetch_registers)
(mips64_linux_regsets_store_registers)
(mips64_linux_fetch_registers, mips64_linux_store_registers)
(mips_linux_register_u_offset, mips_linux_read_description)
(mips_linux_can_use_hw_breakpoint)
(mips_linux_stopped_by_watchpoint)
(mips_linux_stopped_data_address)
(mips_linux_region_ok_for_hw_watchpoint)
(mips_linux_insert_watchpoint, mips_linux_remove_watchpoint)
(mips_linux_close): Refactor as methods of mips_linux_nat.
(_initialize_mips_linux_nat): Adjust to C++ification.
* aix-thread.c (aix_thread_target): New class.
(aix_thread_ops): Now an aix_thread_target.
(aix_thread_detach, aix_thread_resume, aix_thread_wait)
(aix_thread_fetch_registers, aix_thread_store_registers)
(aix_thread_xfer_partial, aix_thread_mourn_inferior)
(aix_thread_thread_alive, aix_thread_pid_to_str)
(aix_thread_extra_thread_info, aix_thread_get_ada_task_ptid):
Refactor as methods of aix_thread_target.
(init_aix_thread_ops): Delete.
(_initialize_aix_thread): Remove references to init_aix_thread_ops
and complete_target_initialization.
* rs6000-nat.c (rs6000_xfer_shared_libraries): Delete.
(rs6000_nat_target): New class.
(the_rs6000_nat_target): New.
(rs6000_fetch_inferior_registers, rs6000_store_inferior_registers)
(rs6000_xfer_partial, rs6000_wait, rs6000_create_inferior)
(rs6000_xfer_shared_libraries): Refactor as rs6000_nat_target methods.
(super_create_inferior): Delete.
(_initialize_rs6000_nat): Adjust to C++ification.
* arm-linux-nat.c (arm_linux_nat_target): New class.
(the_arm_linux_nat_target): New.
(arm_linux_fetch_inferior_registers)
(arm_linux_store_inferior_registers, arm_linux_read_description)
(arm_linux_can_use_hw_breakpoint, arm_linux_insert_hw_breakpoint)
(arm_linux_remove_hw_breakpoint)
(arm_linux_region_ok_for_hw_watchpoint)
(arm_linux_insert_watchpoint, arm_linux_remove_watchpoint)
(arm_linux_stopped_data_address, arm_linux_stopped_by_watchpoint)
(arm_linux_watchpoint_addr_within_range): Refactor as methods of
arm_linux_nat_target.
(_initialize_arm_linux_nat): Adjust to C++ification.
* aarch64-linux-nat.c (aarch64_linux_nat_target): New class.
(the_aarch64_linux_nat_target): New.
(aarch64_linux_fetch_inferior_registers)
(aarch64_linux_store_inferior_registers)
(aarch64_linux_child_post_startup_inferior)
(aarch64_linux_read_description)
(aarch64_linux_can_use_hw_breakpoint)
(aarch64_linux_insert_hw_breakpoint)
(aarch64_linux_remove_hw_breakpoint)
(aarch64_linux_insert_watchpoint, aarch64_linux_remove_watchpoint)
(aarch64_linux_region_ok_for_hw_watchpoint)
(aarch64_linux_stopped_data_address)
(aarch64_linux_stopped_by_watchpoint)
(aarch64_linux_watchpoint_addr_within_range)
(aarch64_linux_can_do_single_step): Refactor as methods of
aarch64_linux_nat_target.
(super_post_startup_inferior): Delete.
(_initialize_aarch64_linux_nat): Adjust to C++ification.
* hppa-linux-nat.c (hppa_linux_nat_target): New class.
(the_hppa_linux_nat_target): New.
(hppa_linux_fetch_inferior_registers)
(hppa_linux_store_inferior_registers): Refactor as methods of
hppa_linux_nat_target.
(_initialize_hppa_linux_nat): Adjust to C++ification.
* ia64-linux-nat.c (ia64_linux_nat_target): New class.
(the_ia64_linux_nat_target): New.
(ia64_linux_insert_watchpoint, ia64_linux_remove_watchpoint)
(ia64_linux_stopped_data_address)
(ia64_linux_stopped_by_watchpoint, ia64_linux_fetch_registers)
(ia64_linux_store_registers, ia64_linux_xfer_partial): Refactor as
ia64_linux_nat_target methods.
(super_xfer_partial): Delete.
(_initialize_ia64_linux_nat): Adjust to C++ification.
* m32r-linux-nat.c (m32r_linux_nat_target): New class.
(the_m32r_linux_nat_target): New.
(m32r_linux_fetch_inferior_registers)
(m32r_linux_store_inferior_registers): Refactor as
m32r_linux_nat_target methods.
(_initialize_m32r_linux_nat): Adjust to C++ification.
* m68k-linux-nat.c (m68k_linux_nat_target): New class.
(the_m68k_linux_nat_target): New.
(m68k_linux_fetch_inferior_registers)
(m68k_linux_store_inferior_registers): Refactor as
m68k_linux_nat_target methods.
(_initialize_m68k_linux_nat): Adjust to C++ification.
* s390-linux-nat.c (s390_linux_nat_target): New class.
(the_s390_linux_nat_target): New.
(s390_linux_fetch_inferior_registers)
(s390_linux_store_inferior_registers, s390_stopped_by_watchpoint)
(s390_insert_watchpoint, s390_remove_watchpoint)
(s390_can_use_hw_breakpoint, s390_insert_hw_breakpoint)
(s390_remove_hw_breakpoint, s390_region_ok_for_hw_watchpoint)
(s390_auxv_parse, s390_read_description): Refactor as methods of
s390_linux_nat_target.
(_initialize_s390_nat): Adjust to C++ification.
* sparc-linux-nat.c (sparc_linux_nat_target): New class.
(the_sparc_linux_nat_target): New.
(_initialize_sparc_linux_nat): Adjust to C++ification.
* sparc-nat.c (sparc_fetch_inferior_registers)
(sparc_store_inferior_registers): Remove target_ops parameter.
* sparc-nat.h (sparc_fetch_inferior_registers)
(sparc_store_inferior_registers): Remove target_ops parameter.
* sparc64-linux-nat.c (sparc64_linux_nat_target): New class.
(the_sparc64_linux_nat_target): New.
(_initialize_sparc64_linux_nat): Adjust to C++ification.
* spu-linux-nat.c (spu_linux_nat_target): New class.
(the_spu_linux_nat_target): New.
(spu_child_post_startup_inferior, spu_child_post_attach)
(spu_child_wait, spu_fetch_inferior_registers)
(spu_store_inferior_registers, spu_xfer_partial)
(spu_can_use_hw_breakpoint): Refactor as spu_linux_nat_target
methods.
(_initialize_spu_nat): Adjust to C++ification.
* tilegx-linux-nat.c (tilegx_linux_nat_target): New class.
(the_tilegx_linux_nat_target): New.
(fetch_inferior_registers, store_inferior_registers):
Refactor as methods.
(_initialize_tile_linux_nat): Adjust to C++ification.
* xtensa-linux-nat.c (xtensa_linux_nat_target): New class.
(the_xtensa_linux_nat_target): New.
(xtensa_linux_fetch_inferior_registers)
(xtensa_linux_store_inferior_registers): Refactor as
xtensa_linux_nat_target methods.
(_initialize_xtensa_linux_nat): Adjust to C++ification.
* fbsd-nat.c (USE_SIGTRAP_SIGINFO): Delete.
(fbsd_pid_to_exec_file, fbsd_find_memory_regions)
(fbsd_find_memory_regions, fbsd_info_proc, fbsd_xfer_partial)
(fbsd_thread_alive, fbsd_pid_to_str, fbsd_thread_name)
(fbsd_update_thread_list, fbsd_resume, fbsd_wait)
(fbsd_stopped_by_sw_breakpoint)
(fbsd_supports_stopped_by_sw_breakpoint, fbsd_follow_fork)
(fbsd_insert_fork_catchpoint, fbsd_remove_fork_catchpoint)
(fbsd_insert_vfork_catchpoint, fbsd_remove_vfork_catchpoint)
(fbsd_post_startup_inferior, fbsd_post_attach)
(fbsd_insert_exec_catchpoint, fbsd_remove_exec_catchpoint)
(fbsd_set_syscall_catchpoint)
(super_xfer_partial, super_resume, super_wait)
(fbsd_supports_stopped_by_hw_breakpoint): Delete.
(fbsd_handle_debug_trap): Remove target_ops parameter.
(fbsd_nat_add_target): Delete.
* fbsd-nat.h: Include "inf-ptrace.h".
(fbsd_nat_add_target): Delete.
(USE_SIGTRAP_SIGINFO): Define.
(fbsd_nat_target): New class.
* amd64-bsd-nat.c (amd64bsd_fetch_inferior_registers)
(amd64bsd_store_inferior_registers): Remove target_ops parameter.
(amd64bsd_target): Delete.
* amd64-bsd-nat.h: New file.
* amd64-fbsd-nat.c: Include "amd64-bsd-nat.h" instead of
"x86-bsd-nat.h".
(amd64_fbsd_nat_target): New class.
(the_amd64_fbsd_nat_target): New.
(amd64fbsd_read_description): Refactor as method of
amd64_fbsd_nat_target.
(amd64_fbsd_nat_target::supports_stopped_by_hw_breakpoint): New.
(_initialize_amd64fbsd_nat): Adjust to C++ification.
* amd64-nat.h (amd64bsd_target): Delete function declaration.
* i386-bsd-nat.c (i386bsd_fetch_inferior_registers)
(i386bsd_store_inferior_registers): Remove target_ops parameter.
(i386bsd_target): Delete.
* i386-bsd-nat.h (i386bsd_target): Delete function declaration.
(i386bsd_fetch_inferior_registers)
(i386bsd_store_inferior_registers): Declare.
(i386_bsd_nat_target): New class.
* i386-fbsd-nat.c (i386_fbsd_nat_target): New class.
(the_i386_fbsd_nat_target): New.
(i386fbsd_resume, i386fbsd_read_description): Refactor as
i386_fbsd_nat_target methods.
(i386_fbsd_nat_target::supports_stopped_by_hw_breakpoint): New.
(_initialize_i386fbsd_nat): Adjust to C++ification.
* x86-bsd-nat.c (super_mourn_inferior): Delete.
(x86bsd_mourn_inferior, x86bsd_target): Delete.
(_initialize_x86_bsd_nat): Adjust to C++ification.
* x86-bsd-nat.h: Include "x86-nat.h".
(x86bsd_target): Delete declaration.
(x86bsd_nat_target): New class.
* aarch64-fbsd-nat.c (aarch64_fbsd_nat_target): New class.
(the_aarch64_fbsd_nat_target): New.
(aarch64_fbsd_fetch_inferior_registers)
(aarch64_fbsd_store_inferior_registers): Refactor as methods of
aarch64_fbsd_nat_target.
(_initialize_aarch64_fbsd_nat): Adjust to C++ification.
* alpha-bsd-nat.c (alpha_bsd_nat_target): New class.
(the_alpha_bsd_nat_target): New.
(alphabsd_fetch_inferior_registers)
(alphabsd_store_inferior_registers): Refactor as
alpha_bsd_nat_target methods.
(_initialize_alphabsd_nat): Refactor as methods of
alpha_bsd_nat_target.
* amd64-nbsd-nat.c: Include "amd64-bsd-nat.h".
(the_amd64_nbsd_nat_target): New.
(_initialize_amd64nbsd_nat): Adjust to C++ification.
* amd64-obsd-nat.c: Include "amd64-bsd-nat.h".
(the_amd64_obsd_nat_target): New.
(_initialize_amd64obsd_nat): Adjust to C++ification.
* arm-fbsd-nat.c (arm_fbsd_nat_target): New.
(the_arm_fbsd_nat_target): New.
(arm_fbsd_fetch_inferior_registers)
(arm_fbsd_store_inferior_registers, arm_fbsd_read_description):
(_initialize_arm_fbsd_nat): Refactor as methods of
arm_fbsd_nat_target.
(_initialize_arm_fbsd_nat): Adjust to C++ification.
* arm-nbsd-nat.c (arm_netbsd_nat_target): New class.
(the_arm_netbsd_nat_target): New.
(armnbsd_fetch_registers, armnbsd_store_registers): Refactor as
arm_netbsd_nat_target.
(_initialize_arm_netbsd_nat): Adjust to C++ification.
* hppa-nbsd-nat.c (hppa_nbsd_nat_target): New class.
(the_hppa_nbsd_nat_target): New.
(hppanbsd_fetch_registers, hppanbsd_store_registers): Refactor as
hppa_nbsd_nat_target methods.
(_initialize_hppanbsd_nat): Adjust to C++ification.
* hppa-obsd-nat.c (hppa_obsd_nat_target): New class.
(the_hppa_obsd_nat_target): New.
(hppaobsd_fetch_registers, hppaobsd_store_registers): Refactor as
methods of hppa_obsd_nat_target.
(_initialize_hppaobsd_nat): Adjust to C++ification. Use
add_target.
* i386-nbsd-nat.c (the_i386_nbsd_nat_target): New.
(_initialize_i386nbsd_nat): Adjust to C++ification. Use
add_target.
* i386-obsd-nat.c (the_i386_obsd_nat_target): New.
(_initialize_i386obsd_nat): Use add_target.
* m68k-bsd-nat.c (m68k_bsd_nat_target): New class.
(the_m68k_bsd_nat_target): New.
(m68kbsd_fetch_inferior_registers)
(m68kbsd_store_inferior_registers): Refactor as methods of
m68k_bsd_nat_target.
(_initialize_m68kbsd_nat): Adjust to C++ification.
* mips-fbsd-nat.c (mips_fbsd_nat_target): New class.
(the_mips_fbsd_nat_target): New.
(mips_fbsd_fetch_inferior_registers)
(mips_fbsd_store_inferior_registers): Refactor as methods of
mips_fbsd_nat_target.
(_initialize_mips_fbsd_nat): Adjust to C++ification. Use
add_target.
* mips-nbsd-nat.c (mips_nbsd_nat_target): New class.
(the_mips_nbsd_nat_target): New.
(mipsnbsd_fetch_inferior_registers)
(mipsnbsd_store_inferior_registers): Refactor as methods of
mips_nbsd_nat_target.
(_initialize_mipsnbsd_nat): Adjust to C++ification.
* mips64-obsd-nat.c (mips64_obsd_nat_target): New class.
(the_mips64_obsd_nat_target): New.
(mips64obsd_fetch_inferior_registers)
(mips64obsd_store_inferior_registers): Refactor as methods of
mips64_obsd_nat_target.
(_initialize_mips64obsd_nat): Adjust to C++ification. Use
add_target.
* nbsd-nat.c (nbsd_pid_to_exec_file): Refactor as method of
nbsd_nat_target.
* nbsd-nat.h: Include "inf-ptrace.h".
(nbsd_nat_target): New class.
* obsd-nat.c (obsd_pid_to_str, obsd_update_thread_list)
(obsd_wait): Refactor as methods of obsd_nat_target.
(obsd_add_target): Delete.
* obsd-nat.h: Include "inf-ptrace.h".
(obsd_nat_target): New class.
* ppc-fbsd-nat.c (ppc_fbsd_nat_target): New class.
(the_ppc_fbsd_nat_target): New.
(ppcfbsd_fetch_inferior_registers)
(ppcfbsd_store_inferior_registers): Refactor as methods of
ppc_fbsd_nat_target.
(_initialize_ppcfbsd_nat): Adjust to C++ification. Use
add_target.
* ppc-nbsd-nat.c (ppc_nbsd_nat_target): New class.
(the_ppc_nbsd_nat_target): New.
(ppcnbsd_fetch_inferior_registers)
(ppcnbsd_store_inferior_registers): Refactor as methods of
ppc_nbsd_nat_target.
(_initialize_ppcnbsd_nat): Adjust to C++ification.
* ppc-obsd-nat.c (ppc_obsd_nat_target): New class.
(the_ppc_obsd_nat_target): New.
(ppcobsd_fetch_registers, ppcobsd_store_registers): Refactor as
methods of ppc_obsd_nat_target.
(_initialize_ppcobsd_nat): Adjust to C++ification. Use
add_target.
* sh-nbsd-nat.c (sh_nbsd_nat_target): New class.
(the_sh_nbsd_nat_target): New.
(shnbsd_fetch_inferior_registers)
(shnbsd_store_inferior_registers): Refactor as methods of
sh_nbsd_nat_target.
(_initialize_shnbsd_nat): Adjust to C++ification.
* sparc-nat.c (sparc_xfer_wcookie): Make extern.
(inf_ptrace_xfer_partial): Delete.
(sparc_xfer_partial, sparc_target): Delete.
* sparc-nat.h (sparc_fetch_inferior_registers)
(sparc_store_inferior_registers, sparc_xfer_wcookie): Declare.
(sparc_target): Delete function declaration.
(sparc_target): New template class.
* sparc-nbsd-nat.c (the_sparc_nbsd_nat_target): New.
(_initialize_sparcnbsd_nat): Adjust to C++ification.
* sparc64-fbsd-nat.c (the_sparc64_fbsd_nat_target): New.
(_initialize_sparc64fbsd_nat): Adjust to C++ification. Use
add_target.
* sparc64-nbsd-nat.c (the_sparc64_nbsd_nat_target): New.
(_initialize_sparc64nbsd_nat): Adjust to C++ification.
* sparc64-obsd-nat.c (the_sparc64_obsd_nat_target): New.
(_initialize_sparc64obsd_nat): Adjust to C++ification. Use
add_target.
* vax-bsd-nat.c (vax_bsd_nat_target): New class.
(the_vax_bsd_nat_target): New.
(vaxbsd_fetch_inferior_registers)
(vaxbsd_store_inferior_registers): Refactor as vax_bsd_nat_target
methods.
(_initialize_vaxbsd_nat): Adjust to C++ification.
* bsd-kvm.c (bsd_kvm_target): New class.
(bsd_kvm_ops): Now a bsd_kvm_target.
(bsd_kvm_open, bsd_kvm_close, bsd_kvm_xfer_partial)
(bsd_kvm_files_info, bsd_kvm_fetch_registers)
(bsd_kvm_thread_alive, bsd_kvm_pid_to_str): Refactor as methods of
bsd_kvm_target.
(bsd_kvm_return_one): Delete.
(bsd_kvm_add_target): Adjust to C++ification.
* nto-procfs.c (nto_procfs_target, nto_procfs_target_native)
(nto_procfs_target_procfs): New classes.
(procfs_open_1, procfs_thread_alive, procfs_update_thread_list)
(procfs_files_info, procfs_pid_to_exec_file, procfs_attach)
(procfs_post_attach, procfs_wait, procfs_fetch_registers)
(procfs_xfer_partial, procfs_detach, procfs_insert_breakpoint)
(procfs_remove_breakpoint, procfs_insert_hw_breakpoint)
(procfs_remove_hw_breakpoint, procfs_resume)
(procfs_mourn_inferior, procfs_create_inferior, procfs_interrupt)
(procfs_kill_inferior, procfs_store_registers)
(procfs_pass_signals, procfs_pid_to_str, procfs_can_run): Refactor
as methods of nto_procfs_target.
(nto_procfs_ops): Now an nto_procfs_target_procfs.
(nto_native_ops): Delete.
(procfs_open, procfs_native_open): Delete.
(nto_native_ops): Now an nto_procfs_target_native.
(init_procfs_targets): Adjust to C++ification.
(procfs_can_use_hw_breakpoint, procfs_remove_hw_watchpoint)
(procfs_insert_hw_watchpoint, procfs_stopped_by_watchpoint):
Refactor as methods of nto_procfs_target.
* go32-nat.c (go32_nat_target): New class.
(the_go32_nat_target): New.
(go32_attach, go32_resume, go32_wait, go32_fetch_registers)
(go32_store_registers, go32_xfer_partial, go32_files_info)
(go32_kill_inferior, go32_create_inferior, go32_mourn_inferior)
(go32_terminal_init, go32_terminal_info, go32_terminal_inferior)
(go32_terminal_ours, go32_pass_ctrlc, go32_thread_alive)
(go32_pid_to_str): Refactor as methods of go32_nat_target.
(go32_target): Delete.
(_initialize_go32_nat): Adjust to C++ification.
* gnu-nat.c (gnu_wait, gnu_resume, gnu_kill_inferior)
(gnu_mourn_inferior, gnu_create_inferior, gnu_attach, gnu_detach)
(gnu_stop, gnu_thread_alive, gnu_xfer_partial)
(gnu_find_memory_regions, gnu_pid_to_str): Refactor as methods of
gnu_nat_target.
(gnu_target): Delete.
* gnu-nat.h (gnu_target): Delete.
(gnu_nat_target): New class.
* i386-gnu-nat.c (gnu_base_target): New.
(i386_gnu_nat_target): New class.
(the_i386_gnu_nat_target): New.
(_initialize_i386gnu_nat): Adjust to C++ification.
gdb/testsuite/ChangeLog:
2018-05-02 Pedro Alves <palves@redhat.com>
* gdb.base/breakpoint-in-ro-region.exp: Adjust to to_resume and
to_log_command renames.
* gdb.base/sss-bp-on-user-bp-2.exp: Likewise.
1337 lines
36 KiB
C
1337 lines
36 KiB
C
/* GNU/Linux on ARM native support.
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Copyright (C) 1999-2018 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include "inferior.h"
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#include "gdbcore.h"
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#include "regcache.h"
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#include "target.h"
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#include "linux-nat.h"
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#include "target-descriptions.h"
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#include "auxv.h"
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#include "observable.h"
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#include "gdbthread.h"
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#include "arm-tdep.h"
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#include "arm-linux-tdep.h"
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#include "aarch32-linux-nat.h"
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#include <elf/common.h>
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#include <sys/user.h>
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#include "nat/gdb_ptrace.h"
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#include <sys/utsname.h>
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#include <sys/procfs.h>
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#include "nat/linux-ptrace.h"
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/* Prototypes for supply_gregset etc. */
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#include "gregset.h"
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/* Defines ps_err_e, struct ps_prochandle. */
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#include "gdb_proc_service.h"
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#ifndef PTRACE_GET_THREAD_AREA
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#define PTRACE_GET_THREAD_AREA 22
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#endif
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#ifndef PTRACE_GETWMMXREGS
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#define PTRACE_GETWMMXREGS 18
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#define PTRACE_SETWMMXREGS 19
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#endif
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#ifndef PTRACE_GETVFPREGS
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#define PTRACE_GETVFPREGS 27
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#define PTRACE_SETVFPREGS 28
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#endif
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#ifndef PTRACE_GETHBPREGS
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#define PTRACE_GETHBPREGS 29
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#define PTRACE_SETHBPREGS 30
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#endif
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extern int arm_apcs_32;
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class arm_linux_nat_target final : public linux_nat_target
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{
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public:
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/* Add our register access methods. */
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void fetch_registers (struct regcache *, int) override;
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void store_registers (struct regcache *, int) override;
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/* Add our hardware breakpoint and watchpoint implementation. */
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int can_use_hw_breakpoint (enum bptype, int, int) override;
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int insert_hw_breakpoint (struct gdbarch *, struct bp_target_info *) override;
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int remove_hw_breakpoint (struct gdbarch *, struct bp_target_info *) override;
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int region_ok_for_hw_watchpoint (CORE_ADDR, int) override;
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int insert_watchpoint (CORE_ADDR, int, enum target_hw_bp_type,
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struct expression *) override;
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int remove_watchpoint (CORE_ADDR, int, enum target_hw_bp_type,
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struct expression *) override;
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int stopped_by_watchpoint () override;
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int stopped_data_address (CORE_ADDR *) override;
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int watchpoint_addr_within_range (CORE_ADDR, CORE_ADDR, int) override;
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const struct target_desc *read_description () override;
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};
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static arm_linux_nat_target the_arm_linux_nat_target;
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/* Get the whole floating point state of the process and store it
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into regcache. */
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static void
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fetch_fpregs (struct regcache *regcache)
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{
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int ret, regno, tid;
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gdb_byte fp[ARM_LINUX_SIZEOF_NWFPE];
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/* Get the thread id for the ptrace call. */
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tid = ptid_get_lwp (regcache_get_ptid (regcache));
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/* Read the floating point state. */
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if (have_ptrace_getregset == TRIBOOL_TRUE)
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{
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struct iovec iov;
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iov.iov_base = &fp;
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iov.iov_len = ARM_LINUX_SIZEOF_NWFPE;
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ret = ptrace (PTRACE_GETREGSET, tid, NT_FPREGSET, &iov);
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}
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else
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ret = ptrace (PT_GETFPREGS, tid, 0, fp);
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if (ret < 0)
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perror_with_name (_("Unable to fetch the floating point registers."));
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/* Fetch fpsr. */
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regcache_raw_supply (regcache, ARM_FPS_REGNUM,
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fp + NWFPE_FPSR_OFFSET);
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/* Fetch the floating point registers. */
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for (regno = ARM_F0_REGNUM; regno <= ARM_F7_REGNUM; regno++)
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supply_nwfpe_register (regcache, regno, fp);
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}
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/* Save the whole floating point state of the process using
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the contents from regcache. */
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static void
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store_fpregs (const struct regcache *regcache)
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{
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int ret, regno, tid;
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gdb_byte fp[ARM_LINUX_SIZEOF_NWFPE];
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/* Get the thread id for the ptrace call. */
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tid = ptid_get_lwp (regcache_get_ptid (regcache));
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/* Read the floating point state. */
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if (have_ptrace_getregset == TRIBOOL_TRUE)
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{
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elf_fpregset_t fpregs;
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struct iovec iov;
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iov.iov_base = &fpregs;
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iov.iov_len = sizeof (fpregs);
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ret = ptrace (PTRACE_GETREGSET, tid, NT_FPREGSET, &iov);
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}
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else
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ret = ptrace (PT_GETFPREGS, tid, 0, fp);
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if (ret < 0)
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perror_with_name (_("Unable to fetch the floating point registers."));
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/* Store fpsr. */
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if (REG_VALID == regcache_register_status (regcache, ARM_FPS_REGNUM))
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regcache_raw_collect (regcache, ARM_FPS_REGNUM, fp + NWFPE_FPSR_OFFSET);
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/* Store the floating point registers. */
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for (regno = ARM_F0_REGNUM; regno <= ARM_F7_REGNUM; regno++)
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if (REG_VALID == regcache_register_status (regcache, regno))
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collect_nwfpe_register (regcache, regno, fp);
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if (have_ptrace_getregset == TRIBOOL_TRUE)
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{
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struct iovec iov;
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iov.iov_base = &fp;
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iov.iov_len = ARM_LINUX_SIZEOF_NWFPE;
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ret = ptrace (PTRACE_SETREGSET, tid, NT_FPREGSET, &iov);
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}
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else
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ret = ptrace (PTRACE_SETFPREGS, tid, 0, fp);
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if (ret < 0)
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perror_with_name (_("Unable to store floating point registers."));
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}
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/* Fetch all general registers of the process and store into
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regcache. */
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static void
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fetch_regs (struct regcache *regcache)
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{
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int ret, regno, tid;
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elf_gregset_t regs;
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/* Get the thread id for the ptrace call. */
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tid = ptid_get_lwp (regcache_get_ptid (regcache));
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if (have_ptrace_getregset == TRIBOOL_TRUE)
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{
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struct iovec iov;
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iov.iov_base = ®s;
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iov.iov_len = sizeof (regs);
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ret = ptrace (PTRACE_GETREGSET, tid, NT_PRSTATUS, &iov);
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}
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else
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ret = ptrace (PTRACE_GETREGS, tid, 0, ®s);
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if (ret < 0)
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perror_with_name (_("Unable to fetch general registers."));
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aarch32_gp_regcache_supply (regcache, (uint32_t *) regs, arm_apcs_32);
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}
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static void
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store_regs (const struct regcache *regcache)
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{
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int ret, regno, tid;
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elf_gregset_t regs;
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/* Get the thread id for the ptrace call. */
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tid = ptid_get_lwp (regcache_get_ptid (regcache));
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/* Fetch the general registers. */
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if (have_ptrace_getregset == TRIBOOL_TRUE)
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{
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struct iovec iov;
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iov.iov_base = ®s;
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iov.iov_len = sizeof (regs);
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ret = ptrace (PTRACE_GETREGSET, tid, NT_PRSTATUS, &iov);
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}
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else
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ret = ptrace (PTRACE_GETREGS, tid, 0, ®s);
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if (ret < 0)
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perror_with_name (_("Unable to fetch general registers."));
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aarch32_gp_regcache_collect (regcache, (uint32_t *) regs, arm_apcs_32);
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if (have_ptrace_getregset == TRIBOOL_TRUE)
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{
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struct iovec iov;
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iov.iov_base = ®s;
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iov.iov_len = sizeof (regs);
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ret = ptrace (PTRACE_SETREGSET, tid, NT_PRSTATUS, &iov);
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}
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else
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ret = ptrace (PTRACE_SETREGS, tid, 0, ®s);
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if (ret < 0)
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perror_with_name (_("Unable to store general registers."));
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}
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/* Fetch all WMMX registers of the process and store into
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regcache. */
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#define IWMMXT_REGS_SIZE (16 * 8 + 6 * 4)
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static void
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fetch_wmmx_regs (struct regcache *regcache)
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{
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char regbuf[IWMMXT_REGS_SIZE];
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int ret, regno, tid;
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/* Get the thread id for the ptrace call. */
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tid = ptid_get_lwp (regcache_get_ptid (regcache));
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ret = ptrace (PTRACE_GETWMMXREGS, tid, 0, regbuf);
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if (ret < 0)
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perror_with_name (_("Unable to fetch WMMX registers."));
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for (regno = 0; regno < 16; regno++)
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regcache_raw_supply (regcache, regno + ARM_WR0_REGNUM,
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®buf[regno * 8]);
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for (regno = 0; regno < 2; regno++)
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regcache_raw_supply (regcache, regno + ARM_WCSSF_REGNUM,
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®buf[16 * 8 + regno * 4]);
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for (regno = 0; regno < 4; regno++)
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regcache_raw_supply (regcache, regno + ARM_WCGR0_REGNUM,
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®buf[16 * 8 + 2 * 4 + regno * 4]);
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}
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static void
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store_wmmx_regs (const struct regcache *regcache)
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{
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char regbuf[IWMMXT_REGS_SIZE];
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int ret, regno, tid;
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/* Get the thread id for the ptrace call. */
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tid = ptid_get_lwp (regcache_get_ptid (regcache));
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ret = ptrace (PTRACE_GETWMMXREGS, tid, 0, regbuf);
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if (ret < 0)
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perror_with_name (_("Unable to fetch WMMX registers."));
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for (regno = 0; regno < 16; regno++)
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if (REG_VALID == regcache_register_status (regcache,
|
|
regno + ARM_WR0_REGNUM))
|
|
regcache_raw_collect (regcache, regno + ARM_WR0_REGNUM,
|
|
®buf[regno * 8]);
|
|
|
|
for (regno = 0; regno < 2; regno++)
|
|
if (REG_VALID == regcache_register_status (regcache,
|
|
regno + ARM_WCSSF_REGNUM))
|
|
regcache_raw_collect (regcache, regno + ARM_WCSSF_REGNUM,
|
|
®buf[16 * 8 + regno * 4]);
|
|
|
|
for (regno = 0; regno < 4; regno++)
|
|
if (REG_VALID == regcache_register_status (regcache,
|
|
regno + ARM_WCGR0_REGNUM))
|
|
regcache_raw_collect (regcache, regno + ARM_WCGR0_REGNUM,
|
|
®buf[16 * 8 + 2 * 4 + regno * 4]);
|
|
|
|
ret = ptrace (PTRACE_SETWMMXREGS, tid, 0, regbuf);
|
|
|
|
if (ret < 0)
|
|
perror_with_name (_("Unable to store WMMX registers."));
|
|
}
|
|
|
|
static void
|
|
fetch_vfp_regs (struct regcache *regcache)
|
|
{
|
|
gdb_byte regbuf[VFP_REGS_SIZE];
|
|
int ret, regno, tid;
|
|
struct gdbarch *gdbarch = regcache->arch ();
|
|
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
|
|
|
|
/* Get the thread id for the ptrace call. */
|
|
tid = ptid_get_lwp (regcache_get_ptid (regcache));
|
|
|
|
if (have_ptrace_getregset == TRIBOOL_TRUE)
|
|
{
|
|
struct iovec iov;
|
|
|
|
iov.iov_base = regbuf;
|
|
iov.iov_len = VFP_REGS_SIZE;
|
|
ret = ptrace (PTRACE_GETREGSET, tid, NT_ARM_VFP, &iov);
|
|
}
|
|
else
|
|
ret = ptrace (PTRACE_GETVFPREGS, tid, 0, regbuf);
|
|
|
|
if (ret < 0)
|
|
perror_with_name (_("Unable to fetch VFP registers."));
|
|
|
|
aarch32_vfp_regcache_supply (regcache, regbuf,
|
|
tdep->vfp_register_count);
|
|
}
|
|
|
|
static void
|
|
store_vfp_regs (const struct regcache *regcache)
|
|
{
|
|
gdb_byte regbuf[VFP_REGS_SIZE];
|
|
int ret, regno, tid;
|
|
struct gdbarch *gdbarch = regcache->arch ();
|
|
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
|
|
|
|
/* Get the thread id for the ptrace call. */
|
|
tid = ptid_get_lwp (regcache_get_ptid (regcache));
|
|
|
|
if (have_ptrace_getregset == TRIBOOL_TRUE)
|
|
{
|
|
struct iovec iov;
|
|
|
|
iov.iov_base = regbuf;
|
|
iov.iov_len = VFP_REGS_SIZE;
|
|
ret = ptrace (PTRACE_GETREGSET, tid, NT_ARM_VFP, &iov);
|
|
}
|
|
else
|
|
ret = ptrace (PTRACE_GETVFPREGS, tid, 0, regbuf);
|
|
|
|
if (ret < 0)
|
|
perror_with_name (_("Unable to fetch VFP registers (for update)."));
|
|
|
|
aarch32_vfp_regcache_collect (regcache, regbuf,
|
|
tdep->vfp_register_count);
|
|
|
|
if (have_ptrace_getregset == TRIBOOL_TRUE)
|
|
{
|
|
struct iovec iov;
|
|
|
|
iov.iov_base = regbuf;
|
|
iov.iov_len = VFP_REGS_SIZE;
|
|
ret = ptrace (PTRACE_SETREGSET, tid, NT_ARM_VFP, &iov);
|
|
}
|
|
else
|
|
ret = ptrace (PTRACE_SETVFPREGS, tid, 0, regbuf);
|
|
|
|
if (ret < 0)
|
|
perror_with_name (_("Unable to store VFP registers."));
|
|
}
|
|
|
|
/* Fetch registers from the child process. Fetch all registers if
|
|
regno == -1, otherwise fetch all general registers or all floating
|
|
point registers depending upon the value of regno. */
|
|
|
|
void
|
|
arm_linux_nat_target::fetch_registers (struct regcache *regcache, int regno)
|
|
{
|
|
struct gdbarch *gdbarch = regcache->arch ();
|
|
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
|
|
|
|
if (-1 == regno)
|
|
{
|
|
fetch_regs (regcache);
|
|
if (tdep->have_wmmx_registers)
|
|
fetch_wmmx_regs (regcache);
|
|
if (tdep->vfp_register_count > 0)
|
|
fetch_vfp_regs (regcache);
|
|
if (tdep->have_fpa_registers)
|
|
fetch_fpregs (regcache);
|
|
}
|
|
else
|
|
{
|
|
if (regno < ARM_F0_REGNUM || regno == ARM_PS_REGNUM)
|
|
fetch_regs (regcache);
|
|
else if (regno >= ARM_F0_REGNUM && regno <= ARM_FPS_REGNUM)
|
|
fetch_fpregs (regcache);
|
|
else if (tdep->have_wmmx_registers
|
|
&& regno >= ARM_WR0_REGNUM && regno <= ARM_WCGR7_REGNUM)
|
|
fetch_wmmx_regs (regcache);
|
|
else if (tdep->vfp_register_count > 0
|
|
&& regno >= ARM_D0_REGNUM
|
|
&& (regno < ARM_D0_REGNUM + tdep->vfp_register_count
|
|
|| regno == ARM_FPSCR_REGNUM))
|
|
fetch_vfp_regs (regcache);
|
|
}
|
|
}
|
|
|
|
/* Store registers back into the inferior. Store all registers if
|
|
regno == -1, otherwise store all general registers or all floating
|
|
point registers depending upon the value of regno. */
|
|
|
|
void
|
|
arm_linux_nat_target::store_registers (struct regcache *regcache, int regno)
|
|
{
|
|
struct gdbarch *gdbarch = regcache->arch ();
|
|
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
|
|
|
|
if (-1 == regno)
|
|
{
|
|
store_regs (regcache);
|
|
if (tdep->have_wmmx_registers)
|
|
store_wmmx_regs (regcache);
|
|
if (tdep->vfp_register_count > 0)
|
|
store_vfp_regs (regcache);
|
|
if (tdep->have_fpa_registers)
|
|
store_fpregs (regcache);
|
|
}
|
|
else
|
|
{
|
|
if (regno < ARM_F0_REGNUM || regno == ARM_PS_REGNUM)
|
|
store_regs (regcache);
|
|
else if ((regno >= ARM_F0_REGNUM) && (regno <= ARM_FPS_REGNUM))
|
|
store_fpregs (regcache);
|
|
else if (tdep->have_wmmx_registers
|
|
&& regno >= ARM_WR0_REGNUM && regno <= ARM_WCGR7_REGNUM)
|
|
store_wmmx_regs (regcache);
|
|
else if (tdep->vfp_register_count > 0
|
|
&& regno >= ARM_D0_REGNUM
|
|
&& (regno < ARM_D0_REGNUM + tdep->vfp_register_count
|
|
|| regno == ARM_FPSCR_REGNUM))
|
|
store_vfp_regs (regcache);
|
|
}
|
|
}
|
|
|
|
/* Wrapper functions for the standard regset handling, used by
|
|
thread debugging. */
|
|
|
|
void
|
|
fill_gregset (const struct regcache *regcache,
|
|
gdb_gregset_t *gregsetp, int regno)
|
|
{
|
|
arm_linux_collect_gregset (NULL, regcache, regno, gregsetp, 0);
|
|
}
|
|
|
|
void
|
|
supply_gregset (struct regcache *regcache, const gdb_gregset_t *gregsetp)
|
|
{
|
|
arm_linux_supply_gregset (NULL, regcache, -1, gregsetp, 0);
|
|
}
|
|
|
|
void
|
|
fill_fpregset (const struct regcache *regcache,
|
|
gdb_fpregset_t *fpregsetp, int regno)
|
|
{
|
|
arm_linux_collect_nwfpe (NULL, regcache, regno, fpregsetp, 0);
|
|
}
|
|
|
|
/* Fill GDB's register array with the floating-point register values
|
|
in *fpregsetp. */
|
|
|
|
void
|
|
supply_fpregset (struct regcache *regcache, const gdb_fpregset_t *fpregsetp)
|
|
{
|
|
arm_linux_supply_nwfpe (NULL, regcache, -1, fpregsetp, 0);
|
|
}
|
|
|
|
/* Fetch the thread-local storage pointer for libthread_db. */
|
|
|
|
ps_err_e
|
|
ps_get_thread_area (struct ps_prochandle *ph,
|
|
lwpid_t lwpid, int idx, void **base)
|
|
{
|
|
if (ptrace (PTRACE_GET_THREAD_AREA, lwpid, NULL, base) != 0)
|
|
return PS_ERR;
|
|
|
|
/* IDX is the bias from the thread pointer to the beginning of the
|
|
thread descriptor. It has to be subtracted due to implementation
|
|
quirks in libthread_db. */
|
|
*base = (void *) ((char *)*base - idx);
|
|
|
|
return PS_OK;
|
|
}
|
|
|
|
const struct target_desc *
|
|
arm_linux_nat_target::read_description ()
|
|
{
|
|
CORE_ADDR arm_hwcap = 0;
|
|
|
|
if (have_ptrace_getregset == TRIBOOL_UNKNOWN)
|
|
{
|
|
elf_gregset_t gpregs;
|
|
struct iovec iov;
|
|
int tid = ptid_get_lwp (inferior_ptid);
|
|
|
|
iov.iov_base = &gpregs;
|
|
iov.iov_len = sizeof (gpregs);
|
|
|
|
/* Check if PTRACE_GETREGSET works. */
|
|
if (ptrace (PTRACE_GETREGSET, tid, NT_PRSTATUS, &iov) < 0)
|
|
have_ptrace_getregset = TRIBOOL_FALSE;
|
|
else
|
|
have_ptrace_getregset = TRIBOOL_TRUE;
|
|
}
|
|
|
|
if (target_auxv_search (this, AT_HWCAP, &arm_hwcap) != 1)
|
|
{
|
|
return this->beneath->read_description ();
|
|
}
|
|
|
|
if (arm_hwcap & HWCAP_IWMMXT)
|
|
return tdesc_arm_with_iwmmxt;
|
|
|
|
if (arm_hwcap & HWCAP_VFP)
|
|
{
|
|
int pid;
|
|
char *buf;
|
|
const struct target_desc * result = NULL;
|
|
|
|
/* NEON implies VFPv3-D32 or no-VFP unit. Say that we only support
|
|
Neon with VFPv3-D32. */
|
|
if (arm_hwcap & HWCAP_NEON)
|
|
result = tdesc_arm_with_neon;
|
|
else if ((arm_hwcap & (HWCAP_VFPv3 | HWCAP_VFPv3D16)) == HWCAP_VFPv3)
|
|
result = tdesc_arm_with_vfpv3;
|
|
else
|
|
result = tdesc_arm_with_vfpv2;
|
|
|
|
/* Now make sure that the kernel supports reading these
|
|
registers. Support was added in 2.6.30. */
|
|
pid = ptid_get_lwp (inferior_ptid);
|
|
errno = 0;
|
|
buf = (char *) alloca (VFP_REGS_SIZE);
|
|
if (ptrace (PTRACE_GETVFPREGS, pid, 0, buf) < 0
|
|
&& errno == EIO)
|
|
result = NULL;
|
|
|
|
return result;
|
|
}
|
|
|
|
return this->beneath->read_description ();
|
|
}
|
|
|
|
/* Information describing the hardware breakpoint capabilities. */
|
|
struct arm_linux_hwbp_cap
|
|
{
|
|
gdb_byte arch;
|
|
gdb_byte max_wp_length;
|
|
gdb_byte wp_count;
|
|
gdb_byte bp_count;
|
|
};
|
|
|
|
/* Since we cannot dynamically allocate subfields of arm_linux_process_info,
|
|
assume a maximum number of supported break-/watchpoints. */
|
|
#define MAX_BPTS 16
|
|
#define MAX_WPTS 16
|
|
|
|
/* Get hold of the Hardware Breakpoint information for the target we are
|
|
attached to. Returns NULL if the kernel doesn't support Hardware
|
|
breakpoints at all, or a pointer to the information structure. */
|
|
static const struct arm_linux_hwbp_cap *
|
|
arm_linux_get_hwbp_cap (void)
|
|
{
|
|
/* The info structure we return. */
|
|
static struct arm_linux_hwbp_cap info;
|
|
|
|
/* Is INFO in a good state? -1 means that no attempt has been made to
|
|
initialize INFO; 0 means an attempt has been made, but it failed; 1
|
|
means INFO is in an initialized state. */
|
|
static int available = -1;
|
|
|
|
if (available == -1)
|
|
{
|
|
int tid;
|
|
unsigned int val;
|
|
|
|
tid = ptid_get_lwp (inferior_ptid);
|
|
if (ptrace (PTRACE_GETHBPREGS, tid, 0, &val) < 0)
|
|
available = 0;
|
|
else
|
|
{
|
|
info.arch = (gdb_byte)((val >> 24) & 0xff);
|
|
info.max_wp_length = (gdb_byte)((val >> 16) & 0xff);
|
|
info.wp_count = (gdb_byte)((val >> 8) & 0xff);
|
|
info.bp_count = (gdb_byte)(val & 0xff);
|
|
|
|
if (info.wp_count > MAX_WPTS)
|
|
{
|
|
warning (_("arm-linux-gdb supports %d hardware watchpoints but target \
|
|
supports %d"), MAX_WPTS, info.wp_count);
|
|
info.wp_count = MAX_WPTS;
|
|
}
|
|
|
|
if (info.bp_count > MAX_BPTS)
|
|
{
|
|
warning (_("arm-linux-gdb supports %d hardware breakpoints but target \
|
|
supports %d"), MAX_BPTS, info.bp_count);
|
|
info.bp_count = MAX_BPTS;
|
|
}
|
|
available = (info.arch != 0);
|
|
}
|
|
}
|
|
|
|
return available == 1 ? &info : NULL;
|
|
}
|
|
|
|
/* How many hardware breakpoints are available? */
|
|
static int
|
|
arm_linux_get_hw_breakpoint_count (void)
|
|
{
|
|
const struct arm_linux_hwbp_cap *cap = arm_linux_get_hwbp_cap ();
|
|
return cap != NULL ? cap->bp_count : 0;
|
|
}
|
|
|
|
/* How many hardware watchpoints are available? */
|
|
static int
|
|
arm_linux_get_hw_watchpoint_count (void)
|
|
{
|
|
const struct arm_linux_hwbp_cap *cap = arm_linux_get_hwbp_cap ();
|
|
return cap != NULL ? cap->wp_count : 0;
|
|
}
|
|
|
|
/* Have we got a free break-/watch-point available for use? Returns -1 if
|
|
there is not an appropriate resource available, otherwise returns 1. */
|
|
int
|
|
arm_linux_nat_target::can_use_hw_breakpoint (enum bptype type,
|
|
int cnt, int ot)
|
|
{
|
|
if (type == bp_hardware_watchpoint || type == bp_read_watchpoint
|
|
|| type == bp_access_watchpoint || type == bp_watchpoint)
|
|
{
|
|
int count = arm_linux_get_hw_watchpoint_count ();
|
|
|
|
if (count == 0)
|
|
return 0;
|
|
else if (cnt + ot > count)
|
|
return -1;
|
|
}
|
|
else if (type == bp_hardware_breakpoint)
|
|
{
|
|
int count = arm_linux_get_hw_breakpoint_count ();
|
|
|
|
if (count == 0)
|
|
return 0;
|
|
else if (cnt > count)
|
|
return -1;
|
|
}
|
|
else
|
|
gdb_assert (FALSE);
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* Enum describing the different types of ARM hardware break-/watch-points. */
|
|
typedef enum
|
|
{
|
|
arm_hwbp_break = 0,
|
|
arm_hwbp_load = 1,
|
|
arm_hwbp_store = 2,
|
|
arm_hwbp_access = 3
|
|
} arm_hwbp_type;
|
|
|
|
/* Type describing an ARM Hardware Breakpoint Control register value. */
|
|
typedef unsigned int arm_hwbp_control_t;
|
|
|
|
/* Structure used to keep track of hardware break-/watch-points. */
|
|
struct arm_linux_hw_breakpoint
|
|
{
|
|
/* Address to break on, or being watched. */
|
|
unsigned int address;
|
|
/* Control register for break-/watch- point. */
|
|
arm_hwbp_control_t control;
|
|
};
|
|
|
|
/* Structure containing arrays of per process hardware break-/watchpoints
|
|
for caching address and control information.
|
|
|
|
The Linux ptrace interface to hardware break-/watch-points presents the
|
|
values in a vector centred around 0 (which is used fo generic information).
|
|
Positive indicies refer to breakpoint addresses/control registers, negative
|
|
indices to watchpoint addresses/control registers.
|
|
|
|
The Linux vector is indexed as follows:
|
|
-((i << 1) + 2): Control register for watchpoint i.
|
|
-((i << 1) + 1): Address register for watchpoint i.
|
|
0: Information register.
|
|
((i << 1) + 1): Address register for breakpoint i.
|
|
((i << 1) + 2): Control register for breakpoint i.
|
|
|
|
This structure is used as a per-thread cache of the state stored by the
|
|
kernel, so that we don't need to keep calling into the kernel to find a
|
|
free breakpoint.
|
|
|
|
We treat break-/watch-points with their enable bit clear as being deleted.
|
|
*/
|
|
struct arm_linux_debug_reg_state
|
|
{
|
|
/* Hardware breakpoints for this process. */
|
|
struct arm_linux_hw_breakpoint bpts[MAX_BPTS];
|
|
/* Hardware watchpoints for this process. */
|
|
struct arm_linux_hw_breakpoint wpts[MAX_WPTS];
|
|
};
|
|
|
|
/* Per-process arch-specific data we want to keep. */
|
|
struct arm_linux_process_info
|
|
{
|
|
/* Linked list. */
|
|
struct arm_linux_process_info *next;
|
|
/* The process identifier. */
|
|
pid_t pid;
|
|
/* Hardware break-/watchpoints state information. */
|
|
struct arm_linux_debug_reg_state state;
|
|
|
|
};
|
|
|
|
/* Per-thread arch-specific data we want to keep. */
|
|
struct arch_lwp_info
|
|
{
|
|
/* Non-zero if our copy differs from what's recorded in the thread. */
|
|
char bpts_changed[MAX_BPTS];
|
|
char wpts_changed[MAX_WPTS];
|
|
};
|
|
|
|
static struct arm_linux_process_info *arm_linux_process_list = NULL;
|
|
|
|
/* Find process data for process PID. */
|
|
|
|
static struct arm_linux_process_info *
|
|
arm_linux_find_process_pid (pid_t pid)
|
|
{
|
|
struct arm_linux_process_info *proc;
|
|
|
|
for (proc = arm_linux_process_list; proc; proc = proc->next)
|
|
if (proc->pid == pid)
|
|
return proc;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/* Add process data for process PID. Returns newly allocated info
|
|
object. */
|
|
|
|
static struct arm_linux_process_info *
|
|
arm_linux_add_process (pid_t pid)
|
|
{
|
|
struct arm_linux_process_info *proc;
|
|
|
|
proc = XCNEW (struct arm_linux_process_info);
|
|
proc->pid = pid;
|
|
|
|
proc->next = arm_linux_process_list;
|
|
arm_linux_process_list = proc;
|
|
|
|
return proc;
|
|
}
|
|
|
|
/* Get data specific info for process PID, creating it if necessary.
|
|
Never returns NULL. */
|
|
|
|
static struct arm_linux_process_info *
|
|
arm_linux_process_info_get (pid_t pid)
|
|
{
|
|
struct arm_linux_process_info *proc;
|
|
|
|
proc = arm_linux_find_process_pid (pid);
|
|
if (proc == NULL)
|
|
proc = arm_linux_add_process (pid);
|
|
|
|
return proc;
|
|
}
|
|
|
|
/* Called whenever GDB is no longer debugging process PID. It deletes
|
|
data structures that keep track of debug register state. */
|
|
|
|
static void
|
|
arm_linux_forget_process (pid_t pid)
|
|
{
|
|
struct arm_linux_process_info *proc, **proc_link;
|
|
|
|
proc = arm_linux_process_list;
|
|
proc_link = &arm_linux_process_list;
|
|
|
|
while (proc != NULL)
|
|
{
|
|
if (proc->pid == pid)
|
|
{
|
|
*proc_link = proc->next;
|
|
|
|
xfree (proc);
|
|
return;
|
|
}
|
|
|
|
proc_link = &proc->next;
|
|
proc = *proc_link;
|
|
}
|
|
}
|
|
|
|
/* Get hardware break-/watchpoint state for process PID. */
|
|
|
|
static struct arm_linux_debug_reg_state *
|
|
arm_linux_get_debug_reg_state (pid_t pid)
|
|
{
|
|
return &arm_linux_process_info_get (pid)->state;
|
|
}
|
|
|
|
/* Initialize an ARM hardware break-/watch-point control register value.
|
|
BYTE_ADDRESS_SELECT is the mask of bytes to trigger on; HWBP_TYPE is the
|
|
type of break-/watch-point; ENABLE indicates whether the point is enabled.
|
|
*/
|
|
static arm_hwbp_control_t
|
|
arm_hwbp_control_initialize (unsigned byte_address_select,
|
|
arm_hwbp_type hwbp_type,
|
|
int enable)
|
|
{
|
|
gdb_assert ((byte_address_select & ~0xffU) == 0);
|
|
gdb_assert (hwbp_type != arm_hwbp_break
|
|
|| ((byte_address_select & 0xfU) != 0));
|
|
|
|
return (byte_address_select << 5) | (hwbp_type << 3) | (3 << 1) | enable;
|
|
}
|
|
|
|
/* Does the breakpoint control value CONTROL have the enable bit set? */
|
|
static int
|
|
arm_hwbp_control_is_enabled (arm_hwbp_control_t control)
|
|
{
|
|
return control & 0x1;
|
|
}
|
|
|
|
/* Change a breakpoint control word so that it is in the disabled state. */
|
|
static arm_hwbp_control_t
|
|
arm_hwbp_control_disable (arm_hwbp_control_t control)
|
|
{
|
|
return control & ~0x1;
|
|
}
|
|
|
|
/* Initialise the hardware breakpoint structure P. The breakpoint will be
|
|
enabled, and will point to the placed address of BP_TGT. */
|
|
static void
|
|
arm_linux_hw_breakpoint_initialize (struct gdbarch *gdbarch,
|
|
struct bp_target_info *bp_tgt,
|
|
struct arm_linux_hw_breakpoint *p)
|
|
{
|
|
unsigned mask;
|
|
CORE_ADDR address = bp_tgt->placed_address = bp_tgt->reqstd_address;
|
|
|
|
/* We have to create a mask for the control register which says which bits
|
|
of the word pointed to by address to break on. */
|
|
if (arm_pc_is_thumb (gdbarch, address))
|
|
{
|
|
mask = 0x3;
|
|
address &= ~1;
|
|
}
|
|
else
|
|
{
|
|
mask = 0xf;
|
|
address &= ~3;
|
|
}
|
|
|
|
p->address = (unsigned int) address;
|
|
p->control = arm_hwbp_control_initialize (mask, arm_hwbp_break, 1);
|
|
}
|
|
|
|
/* Get the ARM hardware breakpoint type from the TYPE value we're
|
|
given when asked to set a watchpoint. */
|
|
static arm_hwbp_type
|
|
arm_linux_get_hwbp_type (enum target_hw_bp_type type)
|
|
{
|
|
if (type == hw_read)
|
|
return arm_hwbp_load;
|
|
else if (type == hw_write)
|
|
return arm_hwbp_store;
|
|
else
|
|
return arm_hwbp_access;
|
|
}
|
|
|
|
/* Initialize the hardware breakpoint structure P for a watchpoint at ADDR
|
|
to LEN. The type of watchpoint is given in RW. */
|
|
static void
|
|
arm_linux_hw_watchpoint_initialize (CORE_ADDR addr, int len,
|
|
enum target_hw_bp_type type,
|
|
struct arm_linux_hw_breakpoint *p)
|
|
{
|
|
const struct arm_linux_hwbp_cap *cap = arm_linux_get_hwbp_cap ();
|
|
unsigned mask;
|
|
|
|
gdb_assert (cap != NULL);
|
|
gdb_assert (cap->max_wp_length != 0);
|
|
|
|
mask = (1 << len) - 1;
|
|
|
|
p->address = (unsigned int) addr;
|
|
p->control = arm_hwbp_control_initialize (mask,
|
|
arm_linux_get_hwbp_type (type), 1);
|
|
}
|
|
|
|
/* Are two break-/watch-points equal? */
|
|
static int
|
|
arm_linux_hw_breakpoint_equal (const struct arm_linux_hw_breakpoint *p1,
|
|
const struct arm_linux_hw_breakpoint *p2)
|
|
{
|
|
return p1->address == p2->address && p1->control == p2->control;
|
|
}
|
|
|
|
/* Callback to mark a watch-/breakpoint to be updated in all threads of
|
|
the current process. */
|
|
|
|
struct update_registers_data
|
|
{
|
|
int watch;
|
|
int index;
|
|
};
|
|
|
|
static int
|
|
update_registers_callback (struct lwp_info *lwp, void *arg)
|
|
{
|
|
struct update_registers_data *data = (struct update_registers_data *) arg;
|
|
|
|
if (lwp->arch_private == NULL)
|
|
lwp->arch_private = XCNEW (struct arch_lwp_info);
|
|
|
|
/* The actual update is done later just before resuming the lwp,
|
|
we just mark that the registers need updating. */
|
|
if (data->watch)
|
|
lwp->arch_private->wpts_changed[data->index] = 1;
|
|
else
|
|
lwp->arch_private->bpts_changed[data->index] = 1;
|
|
|
|
/* If the lwp isn't stopped, force it to momentarily pause, so
|
|
we can update its breakpoint registers. */
|
|
if (!lwp->stopped)
|
|
linux_stop_lwp (lwp);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Insert the hardware breakpoint (WATCHPOINT = 0) or watchpoint (WATCHPOINT
|
|
=1) BPT for thread TID. */
|
|
static void
|
|
arm_linux_insert_hw_breakpoint1 (const struct arm_linux_hw_breakpoint* bpt,
|
|
int watchpoint)
|
|
{
|
|
int pid;
|
|
ptid_t pid_ptid;
|
|
gdb_byte count, i;
|
|
struct arm_linux_hw_breakpoint* bpts;
|
|
struct update_registers_data data;
|
|
|
|
pid = ptid_get_pid (inferior_ptid);
|
|
pid_ptid = pid_to_ptid (pid);
|
|
|
|
if (watchpoint)
|
|
{
|
|
count = arm_linux_get_hw_watchpoint_count ();
|
|
bpts = arm_linux_get_debug_reg_state (pid)->wpts;
|
|
}
|
|
else
|
|
{
|
|
count = arm_linux_get_hw_breakpoint_count ();
|
|
bpts = arm_linux_get_debug_reg_state (pid)->bpts;
|
|
}
|
|
|
|
for (i = 0; i < count; ++i)
|
|
if (!arm_hwbp_control_is_enabled (bpts[i].control))
|
|
{
|
|
data.watch = watchpoint;
|
|
data.index = i;
|
|
bpts[i] = *bpt;
|
|
iterate_over_lwps (pid_ptid, update_registers_callback, &data);
|
|
break;
|
|
}
|
|
|
|
gdb_assert (i != count);
|
|
}
|
|
|
|
/* Remove the hardware breakpoint (WATCHPOINT = 0) or watchpoint
|
|
(WATCHPOINT = 1) BPT for thread TID. */
|
|
static void
|
|
arm_linux_remove_hw_breakpoint1 (const struct arm_linux_hw_breakpoint *bpt,
|
|
int watchpoint)
|
|
{
|
|
int pid;
|
|
gdb_byte count, i;
|
|
ptid_t pid_ptid;
|
|
struct arm_linux_hw_breakpoint* bpts;
|
|
struct update_registers_data data;
|
|
|
|
pid = ptid_get_pid (inferior_ptid);
|
|
pid_ptid = pid_to_ptid (pid);
|
|
|
|
if (watchpoint)
|
|
{
|
|
count = arm_linux_get_hw_watchpoint_count ();
|
|
bpts = arm_linux_get_debug_reg_state (pid)->wpts;
|
|
}
|
|
else
|
|
{
|
|
count = arm_linux_get_hw_breakpoint_count ();
|
|
bpts = arm_linux_get_debug_reg_state (pid)->bpts;
|
|
}
|
|
|
|
for (i = 0; i < count; ++i)
|
|
if (arm_linux_hw_breakpoint_equal (bpt, bpts + i))
|
|
{
|
|
data.watch = watchpoint;
|
|
data.index = i;
|
|
bpts[i].control = arm_hwbp_control_disable (bpts[i].control);
|
|
iterate_over_lwps (pid_ptid, update_registers_callback, &data);
|
|
break;
|
|
}
|
|
|
|
gdb_assert (i != count);
|
|
}
|
|
|
|
/* Insert a Hardware breakpoint. */
|
|
int
|
|
arm_linux_nat_target::insert_hw_breakpoint (struct gdbarch *gdbarch,
|
|
struct bp_target_info *bp_tgt)
|
|
{
|
|
struct lwp_info *lp;
|
|
struct arm_linux_hw_breakpoint p;
|
|
|
|
if (arm_linux_get_hw_breakpoint_count () == 0)
|
|
return -1;
|
|
|
|
arm_linux_hw_breakpoint_initialize (gdbarch, bp_tgt, &p);
|
|
|
|
arm_linux_insert_hw_breakpoint1 (&p, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Remove a hardware breakpoint. */
|
|
int
|
|
arm_linux_nat_target::remove_hw_breakpoint (struct gdbarch *gdbarch,
|
|
struct bp_target_info *bp_tgt)
|
|
{
|
|
struct lwp_info *lp;
|
|
struct arm_linux_hw_breakpoint p;
|
|
|
|
if (arm_linux_get_hw_breakpoint_count () == 0)
|
|
return -1;
|
|
|
|
arm_linux_hw_breakpoint_initialize (gdbarch, bp_tgt, &p);
|
|
|
|
arm_linux_remove_hw_breakpoint1 (&p, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Are we able to use a hardware watchpoint for the LEN bytes starting at
|
|
ADDR? */
|
|
int
|
|
arm_linux_nat_target::region_ok_for_hw_watchpoint (CORE_ADDR addr, int len)
|
|
{
|
|
const struct arm_linux_hwbp_cap *cap = arm_linux_get_hwbp_cap ();
|
|
CORE_ADDR max_wp_length, aligned_addr;
|
|
|
|
/* Can not set watchpoints for zero or negative lengths. */
|
|
if (len <= 0)
|
|
return 0;
|
|
|
|
/* Need to be able to use the ptrace interface. */
|
|
if (cap == NULL || cap->wp_count == 0)
|
|
return 0;
|
|
|
|
/* Test that the range [ADDR, ADDR + LEN) fits into the largest address
|
|
range covered by a watchpoint. */
|
|
max_wp_length = (CORE_ADDR)cap->max_wp_length;
|
|
aligned_addr = addr & ~(max_wp_length - 1);
|
|
|
|
if (aligned_addr + max_wp_length < addr + len)
|
|
return 0;
|
|
|
|
/* The current ptrace interface can only handle watchpoints that are a
|
|
power of 2. */
|
|
if ((len & (len - 1)) != 0)
|
|
return 0;
|
|
|
|
/* All tests passed so we must be able to set a watchpoint. */
|
|
return 1;
|
|
}
|
|
|
|
/* Insert a Hardware breakpoint. */
|
|
int
|
|
arm_linux_nat_target::insert_watchpoint (CORE_ADDR addr, int len,
|
|
enum target_hw_bp_type rw,
|
|
struct expression *cond)
|
|
{
|
|
struct lwp_info *lp;
|
|
struct arm_linux_hw_breakpoint p;
|
|
|
|
if (arm_linux_get_hw_watchpoint_count () == 0)
|
|
return -1;
|
|
|
|
arm_linux_hw_watchpoint_initialize (addr, len, rw, &p);
|
|
|
|
arm_linux_insert_hw_breakpoint1 (&p, 1);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Remove a hardware breakpoint. */
|
|
int
|
|
arm_linux_nat_target::remove_watchpoint (CORE_ADDR addr,
|
|
int len, enum target_hw_bp_type rw,
|
|
struct expression *cond)
|
|
{
|
|
struct lwp_info *lp;
|
|
struct arm_linux_hw_breakpoint p;
|
|
|
|
if (arm_linux_get_hw_watchpoint_count () == 0)
|
|
return -1;
|
|
|
|
arm_linux_hw_watchpoint_initialize (addr, len, rw, &p);
|
|
|
|
arm_linux_remove_hw_breakpoint1 (&p, 1);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* What was the data address the target was stopped on accessing. */
|
|
int
|
|
arm_linux_nat_target::stopped_data_address (CORE_ADDR *addr_p)
|
|
{
|
|
siginfo_t siginfo;
|
|
int slot;
|
|
|
|
if (!linux_nat_get_siginfo (inferior_ptid, &siginfo))
|
|
return 0;
|
|
|
|
/* This must be a hardware breakpoint. */
|
|
if (siginfo.si_signo != SIGTRAP
|
|
|| (siginfo.si_code & 0xffff) != 0x0004 /* TRAP_HWBKPT */)
|
|
return 0;
|
|
|
|
/* We must be able to set hardware watchpoints. */
|
|
if (arm_linux_get_hw_watchpoint_count () == 0)
|
|
return 0;
|
|
|
|
slot = siginfo.si_errno;
|
|
|
|
/* If we are in a positive slot then we're looking at a breakpoint and not
|
|
a watchpoint. */
|
|
if (slot >= 0)
|
|
return 0;
|
|
|
|
*addr_p = (CORE_ADDR) (uintptr_t) siginfo.si_addr;
|
|
return 1;
|
|
}
|
|
|
|
/* Has the target been stopped by hitting a watchpoint? */
|
|
int
|
|
arm_linux_nat_target::stopped_by_watchpoint ()
|
|
{
|
|
CORE_ADDR addr;
|
|
return stopped_data_address (&addr);
|
|
}
|
|
|
|
int
|
|
arm_linux_nat_target::watchpoint_addr_within_range (CORE_ADDR addr,
|
|
CORE_ADDR start,
|
|
int length)
|
|
{
|
|
return start <= addr && start + length - 1 >= addr;
|
|
}
|
|
|
|
/* Handle thread creation. We need to copy the breakpoints and watchpoints
|
|
in the parent thread to the child thread. */
|
|
static void
|
|
arm_linux_new_thread (struct lwp_info *lp)
|
|
{
|
|
int i;
|
|
struct arch_lwp_info *info = XCNEW (struct arch_lwp_info);
|
|
|
|
/* Mark that all the hardware breakpoint/watchpoint register pairs
|
|
for this thread need to be initialized. */
|
|
|
|
for (i = 0; i < MAX_BPTS; i++)
|
|
{
|
|
info->bpts_changed[i] = 1;
|
|
info->wpts_changed[i] = 1;
|
|
}
|
|
|
|
lp->arch_private = info;
|
|
}
|
|
|
|
/* Function to call when a thread is being deleted. */
|
|
|
|
static void
|
|
arm_linux_delete_thread (struct arch_lwp_info *arch_lwp)
|
|
{
|
|
xfree (arch_lwp);
|
|
}
|
|
|
|
/* Called when resuming a thread.
|
|
The hardware debug registers are updated when there is any change. */
|
|
|
|
static void
|
|
arm_linux_prepare_to_resume (struct lwp_info *lwp)
|
|
{
|
|
int pid, i;
|
|
struct arm_linux_hw_breakpoint *bpts, *wpts;
|
|
struct arch_lwp_info *arm_lwp_info = lwp->arch_private;
|
|
|
|
pid = ptid_get_lwp (lwp->ptid);
|
|
bpts = arm_linux_get_debug_reg_state (ptid_get_pid (lwp->ptid))->bpts;
|
|
wpts = arm_linux_get_debug_reg_state (ptid_get_pid (lwp->ptid))->wpts;
|
|
|
|
/* NULL means this is the main thread still going through the shell,
|
|
or, no watchpoint has been set yet. In that case, there's
|
|
nothing to do. */
|
|
if (arm_lwp_info == NULL)
|
|
return;
|
|
|
|
for (i = 0; i < arm_linux_get_hw_breakpoint_count (); i++)
|
|
if (arm_lwp_info->bpts_changed[i])
|
|
{
|
|
errno = 0;
|
|
if (arm_hwbp_control_is_enabled (bpts[i].control))
|
|
if (ptrace (PTRACE_SETHBPREGS, pid,
|
|
(PTRACE_TYPE_ARG3) ((i << 1) + 1), &bpts[i].address) < 0)
|
|
perror_with_name (_("Unexpected error setting breakpoint"));
|
|
|
|
if (bpts[i].control != 0)
|
|
if (ptrace (PTRACE_SETHBPREGS, pid,
|
|
(PTRACE_TYPE_ARG3) ((i << 1) + 2), &bpts[i].control) < 0)
|
|
perror_with_name (_("Unexpected error setting breakpoint"));
|
|
|
|
arm_lwp_info->bpts_changed[i] = 0;
|
|
}
|
|
|
|
for (i = 0; i < arm_linux_get_hw_watchpoint_count (); i++)
|
|
if (arm_lwp_info->wpts_changed[i])
|
|
{
|
|
errno = 0;
|
|
if (arm_hwbp_control_is_enabled (wpts[i].control))
|
|
if (ptrace (PTRACE_SETHBPREGS, pid,
|
|
(PTRACE_TYPE_ARG3) -((i << 1) + 1), &wpts[i].address) < 0)
|
|
perror_with_name (_("Unexpected error setting watchpoint"));
|
|
|
|
if (wpts[i].control != 0)
|
|
if (ptrace (PTRACE_SETHBPREGS, pid,
|
|
(PTRACE_TYPE_ARG3) -((i << 1) + 2), &wpts[i].control) < 0)
|
|
perror_with_name (_("Unexpected error setting watchpoint"));
|
|
|
|
arm_lwp_info->wpts_changed[i] = 0;
|
|
}
|
|
}
|
|
|
|
/* linux_nat_new_fork hook. */
|
|
|
|
static void
|
|
arm_linux_new_fork (struct lwp_info *parent, pid_t child_pid)
|
|
{
|
|
pid_t parent_pid;
|
|
struct arm_linux_debug_reg_state *parent_state;
|
|
struct arm_linux_debug_reg_state *child_state;
|
|
|
|
/* NULL means no watchpoint has ever been set in the parent. In
|
|
that case, there's nothing to do. */
|
|
if (parent->arch_private == NULL)
|
|
return;
|
|
|
|
/* GDB core assumes the child inherits the watchpoints/hw
|
|
breakpoints of the parent, and will remove them all from the
|
|
forked off process. Copy the debug registers mirrors into the
|
|
new process so that all breakpoints and watchpoints can be
|
|
removed together. */
|
|
|
|
parent_pid = ptid_get_pid (parent->ptid);
|
|
parent_state = arm_linux_get_debug_reg_state (parent_pid);
|
|
child_state = arm_linux_get_debug_reg_state (child_pid);
|
|
*child_state = *parent_state;
|
|
}
|
|
|
|
void
|
|
_initialize_arm_linux_nat (void)
|
|
{
|
|
target_ops *t = &the_arm_linux_nat_target;
|
|
|
|
/* Register the target. */
|
|
linux_target = &the_arm_linux_nat_target;
|
|
add_target (t);
|
|
|
|
/* Handle thread creation and exit. */
|
|
linux_nat_set_new_thread (t, arm_linux_new_thread);
|
|
linux_nat_set_delete_thread (t, arm_linux_delete_thread);
|
|
linux_nat_set_prepare_to_resume (t, arm_linux_prepare_to_resume);
|
|
|
|
/* Handle process creation and exit. */
|
|
linux_nat_set_new_fork (t, arm_linux_new_fork);
|
|
linux_nat_set_forget_process (t, arm_linux_forget_process);
|
|
}
|