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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.
1086 lines
32 KiB
C
1086 lines
32 KiB
C
/* S390 native-dependent code for GDB, the GNU debugger.
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Copyright (C) 2001-2018 Free Software Foundation, Inc.
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Contributed by D.J. Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com)
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for IBM Deutschland Entwicklung GmbH, IBM Corporation.
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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 "regcache.h"
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#include "inferior.h"
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#include "target.h"
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#include "linux-nat.h"
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#include "auxv.h"
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#include "gregset.h"
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#include "regset.h"
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#include "nat/linux-ptrace.h"
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#include "gdbcmd.h"
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#include "s390-tdep.h"
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#include "s390-linux-tdep.h"
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#include "elf/common.h"
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#include <asm/ptrace.h>
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#include "nat/gdb_ptrace.h"
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#include <asm/types.h>
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#include <sys/procfs.h>
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#include <sys/ucontext.h>
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#include <elf.h>
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#include <algorithm>
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#include "inf-ptrace.h"
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/* Per-thread arch-specific data. */
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struct arch_lwp_info
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{
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/* Non-zero if the thread's PER info must be re-written. */
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int per_info_changed;
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};
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static int have_regset_last_break = 0;
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static int have_regset_system_call = 0;
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static int have_regset_tdb = 0;
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static int have_regset_vxrs = 0;
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static int have_regset_gs = 0;
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/* Register map for 32-bit executables running under a 64-bit
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kernel. */
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#ifdef __s390x__
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static const struct regcache_map_entry s390_64_regmap_gregset[] =
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{
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/* Skip PSWM and PSWA, since they must be handled specially. */
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{ 2, REGCACHE_MAP_SKIP, 8 },
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{ 1, S390_R0_UPPER_REGNUM, 4 }, { 1, S390_R0_REGNUM, 4 },
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{ 1, S390_R1_UPPER_REGNUM, 4 }, { 1, S390_R1_REGNUM, 4 },
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{ 1, S390_R2_UPPER_REGNUM, 4 }, { 1, S390_R2_REGNUM, 4 },
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{ 1, S390_R3_UPPER_REGNUM, 4 }, { 1, S390_R3_REGNUM, 4 },
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{ 1, S390_R4_UPPER_REGNUM, 4 }, { 1, S390_R4_REGNUM, 4 },
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{ 1, S390_R5_UPPER_REGNUM, 4 }, { 1, S390_R5_REGNUM, 4 },
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{ 1, S390_R6_UPPER_REGNUM, 4 }, { 1, S390_R6_REGNUM, 4 },
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{ 1, S390_R7_UPPER_REGNUM, 4 }, { 1, S390_R7_REGNUM, 4 },
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{ 1, S390_R8_UPPER_REGNUM, 4 }, { 1, S390_R8_REGNUM, 4 },
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{ 1, S390_R9_UPPER_REGNUM, 4 }, { 1, S390_R9_REGNUM, 4 },
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{ 1, S390_R10_UPPER_REGNUM, 4 }, { 1, S390_R10_REGNUM, 4 },
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{ 1, S390_R11_UPPER_REGNUM, 4 }, { 1, S390_R11_REGNUM, 4 },
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{ 1, S390_R12_UPPER_REGNUM, 4 }, { 1, S390_R12_REGNUM, 4 },
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{ 1, S390_R13_UPPER_REGNUM, 4 }, { 1, S390_R13_REGNUM, 4 },
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{ 1, S390_R14_UPPER_REGNUM, 4 }, { 1, S390_R14_REGNUM, 4 },
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{ 1, S390_R15_UPPER_REGNUM, 4 }, { 1, S390_R15_REGNUM, 4 },
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{ 16, S390_A0_REGNUM, 4 },
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{ 1, REGCACHE_MAP_SKIP, 4 }, { 1, S390_ORIG_R2_REGNUM, 4 },
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{ 0 }
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};
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static const struct regset s390_64_gregset =
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{
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s390_64_regmap_gregset,
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regcache_supply_regset,
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regcache_collect_regset
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};
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#define S390_PSWM_OFFSET 0
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#define S390_PSWA_OFFSET 8
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#endif
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/* PER-event mask bits and PER control bits (CR9). */
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#define PER_BIT(n) (1UL << (63 - (n)))
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#define PER_EVENT_BRANCH PER_BIT (32)
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#define PER_EVENT_IFETCH PER_BIT (33)
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#define PER_EVENT_STORE PER_BIT (34)
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#define PER_EVENT_NULLIFICATION PER_BIT (39)
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#define PER_CONTROL_BRANCH_ADDRESS PER_BIT (40)
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#define PER_CONTROL_SUSPENSION PER_BIT (41)
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#define PER_CONTROL_ALTERATION PER_BIT (42)
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class s390_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 watchpoint methods. */
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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 *)
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override;
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int remove_hw_breakpoint (struct gdbarch *, struct bp_target_info *)
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override;
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int region_ok_for_hw_watchpoint (CORE_ADDR, int) override;
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int have_continuable_watchpoint () { return 1; }
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int stopped_by_watchpoint () override;
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int watchpoint_addr_within_range (CORE_ADDR, 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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/* Detect target architecture. */
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const struct target_desc *read_description () override;
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int auxv_parse (gdb_byte **readptr,
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gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp)
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override;
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};
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static s390_linux_nat_target the_s390_linux_nat_target;
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/* Fill GDB's register array with the general-purpose register values
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in *REGP.
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When debugging a 32-bit executable running under a 64-bit kernel,
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we have to fix up the 64-bit registers we get from the kernel to
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make them look like 32-bit registers. */
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void
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supply_gregset (struct regcache *regcache, const gregset_t *regp)
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{
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#ifdef __s390x__
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struct gdbarch *gdbarch = regcache->arch ();
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if (gdbarch_ptr_bit (gdbarch) == 32)
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{
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enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
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ULONGEST pswm, pswa;
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gdb_byte buf[4];
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regcache_supply_regset (&s390_64_gregset, regcache, -1,
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regp, sizeof (gregset_t));
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pswm = extract_unsigned_integer ((const gdb_byte *) regp
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+ S390_PSWM_OFFSET, 8, byte_order);
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pswa = extract_unsigned_integer ((const gdb_byte *) regp
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+ S390_PSWA_OFFSET, 8, byte_order);
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store_unsigned_integer (buf, 4, byte_order, (pswm >> 32) | 0x80000);
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regcache_raw_supply (regcache, S390_PSWM_REGNUM, buf);
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store_unsigned_integer (buf, 4, byte_order,
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(pswa & 0x7fffffff) | (pswm & 0x80000000));
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regcache_raw_supply (regcache, S390_PSWA_REGNUM, buf);
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return;
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}
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#endif
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regcache_supply_regset (&s390_gregset, regcache, -1, regp,
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sizeof (gregset_t));
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}
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/* Fill register REGNO (if it is a general-purpose register) in
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*REGP with the value in GDB's register array. If REGNO is -1,
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do this for all registers. */
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void
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fill_gregset (const struct regcache *regcache, gregset_t *regp, int regno)
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{
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#ifdef __s390x__
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struct gdbarch *gdbarch = regcache->arch ();
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if (gdbarch_ptr_bit (gdbarch) == 32)
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{
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regcache_collect_regset (&s390_64_gregset, regcache, regno,
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regp, sizeof (gregset_t));
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if (regno == -1
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|| regno == S390_PSWM_REGNUM || regno == S390_PSWA_REGNUM)
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{
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enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
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ULONGEST pswa, pswm;
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gdb_byte buf[4];
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gdb_byte *pswm_p = (gdb_byte *) regp + S390_PSWM_OFFSET;
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gdb_byte *pswa_p = (gdb_byte *) regp + S390_PSWA_OFFSET;
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pswm = extract_unsigned_integer (pswm_p, 8, byte_order);
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if (regno == -1 || regno == S390_PSWM_REGNUM)
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{
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pswm &= 0x80000000;
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regcache_raw_collect (regcache, S390_PSWM_REGNUM, buf);
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pswm |= (extract_unsigned_integer (buf, 4, byte_order)
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& 0xfff7ffff) << 32;
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}
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if (regno == -1 || regno == S390_PSWA_REGNUM)
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{
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regcache_raw_collect (regcache, S390_PSWA_REGNUM, buf);
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pswa = extract_unsigned_integer (buf, 4, byte_order);
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pswm ^= (pswm ^ pswa) & 0x80000000;
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pswa &= 0x7fffffff;
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store_unsigned_integer (pswa_p, 8, byte_order, pswa);
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}
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store_unsigned_integer (pswm_p, 8, byte_order, pswm);
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}
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return;
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}
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#endif
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regcache_collect_regset (&s390_gregset, regcache, regno, regp,
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sizeof (gregset_t));
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}
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/* Fill GDB's register array with the floating-point register values
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in *REGP. */
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void
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supply_fpregset (struct regcache *regcache, const fpregset_t *regp)
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{
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regcache_supply_regset (&s390_fpregset, regcache, -1, regp,
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sizeof (fpregset_t));
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}
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/* Fill register REGNO (if it is a general-purpose register) in
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*REGP with the value in GDB's register array. If REGNO is -1,
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do this for all registers. */
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void
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fill_fpregset (const struct regcache *regcache, fpregset_t *regp, int regno)
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{
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regcache_collect_regset (&s390_fpregset, regcache, regno, regp,
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sizeof (fpregset_t));
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}
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/* Find the TID for the current inferior thread to use with ptrace. */
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static int
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s390_inferior_tid (void)
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{
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/* GNU/Linux LWP ID's are process ID's. */
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int tid = ptid_get_lwp (inferior_ptid);
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if (tid == 0)
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tid = ptid_get_pid (inferior_ptid); /* Not a threaded program. */
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return tid;
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}
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/* Fetch all general-purpose registers from process/thread TID and
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store their values in GDB's register cache. */
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static void
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fetch_regs (struct regcache *regcache, int tid)
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|
{
|
|
gregset_t regs;
|
|
ptrace_area parea;
|
|
|
|
parea.len = sizeof (regs);
|
|
parea.process_addr = (addr_t) ®s;
|
|
parea.kernel_addr = offsetof (struct user_regs_struct, psw);
|
|
if (ptrace (PTRACE_PEEKUSR_AREA, tid, (long) &parea, 0) < 0)
|
|
perror_with_name (_("Couldn't get registers"));
|
|
|
|
supply_gregset (regcache, (const gregset_t *) ®s);
|
|
}
|
|
|
|
/* Store all valid general-purpose registers in GDB's register cache
|
|
into the process/thread specified by TID. */
|
|
static void
|
|
store_regs (const struct regcache *regcache, int tid, int regnum)
|
|
{
|
|
gregset_t regs;
|
|
ptrace_area parea;
|
|
|
|
parea.len = sizeof (regs);
|
|
parea.process_addr = (addr_t) ®s;
|
|
parea.kernel_addr = offsetof (struct user_regs_struct, psw);
|
|
if (ptrace (PTRACE_PEEKUSR_AREA, tid, (long) &parea, 0) < 0)
|
|
perror_with_name (_("Couldn't get registers"));
|
|
|
|
fill_gregset (regcache, ®s, regnum);
|
|
|
|
if (ptrace (PTRACE_POKEUSR_AREA, tid, (long) &parea, 0) < 0)
|
|
perror_with_name (_("Couldn't write registers"));
|
|
}
|
|
|
|
/* Fetch all floating-point registers from process/thread TID and store
|
|
their values in GDB's register cache. */
|
|
static void
|
|
fetch_fpregs (struct regcache *regcache, int tid)
|
|
{
|
|
fpregset_t fpregs;
|
|
ptrace_area parea;
|
|
|
|
parea.len = sizeof (fpregs);
|
|
parea.process_addr = (addr_t) &fpregs;
|
|
parea.kernel_addr = offsetof (struct user_regs_struct, fp_regs);
|
|
if (ptrace (PTRACE_PEEKUSR_AREA, tid, (long) &parea, 0) < 0)
|
|
perror_with_name (_("Couldn't get floating point status"));
|
|
|
|
supply_fpregset (regcache, (const fpregset_t *) &fpregs);
|
|
}
|
|
|
|
/* Store all valid floating-point registers in GDB's register cache
|
|
into the process/thread specified by TID. */
|
|
static void
|
|
store_fpregs (const struct regcache *regcache, int tid, int regnum)
|
|
{
|
|
fpregset_t fpregs;
|
|
ptrace_area parea;
|
|
|
|
parea.len = sizeof (fpregs);
|
|
parea.process_addr = (addr_t) &fpregs;
|
|
parea.kernel_addr = offsetof (struct user_regs_struct, fp_regs);
|
|
if (ptrace (PTRACE_PEEKUSR_AREA, tid, (long) &parea, 0) < 0)
|
|
perror_with_name (_("Couldn't get floating point status"));
|
|
|
|
fill_fpregset (regcache, &fpregs, regnum);
|
|
|
|
if (ptrace (PTRACE_POKEUSR_AREA, tid, (long) &parea, 0) < 0)
|
|
perror_with_name (_("Couldn't write floating point status"));
|
|
}
|
|
|
|
/* Fetch all registers in the kernel's register set whose number is
|
|
REGSET_ID, whose size is REGSIZE, and whose layout is described by
|
|
REGSET, from process/thread TID and store their values in GDB's
|
|
register cache. */
|
|
static void
|
|
fetch_regset (struct regcache *regcache, int tid,
|
|
int regset_id, int regsize, const struct regset *regset)
|
|
{
|
|
void *buf = alloca (regsize);
|
|
struct iovec iov;
|
|
|
|
iov.iov_base = buf;
|
|
iov.iov_len = regsize;
|
|
|
|
if (ptrace (PTRACE_GETREGSET, tid, (long) regset_id, (long) &iov) < 0)
|
|
{
|
|
if (errno == ENODATA)
|
|
regcache_supply_regset (regset, regcache, -1, NULL, regsize);
|
|
else
|
|
perror_with_name (_("Couldn't get register set"));
|
|
}
|
|
else
|
|
regcache_supply_regset (regset, regcache, -1, buf, regsize);
|
|
}
|
|
|
|
/* Store all registers in the kernel's register set whose number is
|
|
REGSET_ID, whose size is REGSIZE, and whose layout is described by
|
|
REGSET, from GDB's register cache back to process/thread TID. */
|
|
static void
|
|
store_regset (struct regcache *regcache, int tid,
|
|
int regset_id, int regsize, const struct regset *regset)
|
|
{
|
|
void *buf = alloca (regsize);
|
|
struct iovec iov;
|
|
|
|
iov.iov_base = buf;
|
|
iov.iov_len = regsize;
|
|
|
|
if (ptrace (PTRACE_GETREGSET, tid, (long) regset_id, (long) &iov) < 0)
|
|
perror_with_name (_("Couldn't get register set"));
|
|
|
|
regcache_collect_regset (regset, regcache, -1, buf, regsize);
|
|
|
|
if (ptrace (PTRACE_SETREGSET, tid, (long) regset_id, (long) &iov) < 0)
|
|
perror_with_name (_("Couldn't set register set"));
|
|
}
|
|
|
|
/* Check whether the kernel provides a register set with number REGSET
|
|
of size REGSIZE for process/thread TID. */
|
|
static int
|
|
check_regset (int tid, int regset, int regsize)
|
|
{
|
|
void *buf = alloca (regsize);
|
|
struct iovec iov;
|
|
|
|
iov.iov_base = buf;
|
|
iov.iov_len = regsize;
|
|
|
|
if (ptrace (PTRACE_GETREGSET, tid, (long) regset, (long) &iov) >= 0
|
|
|| errno == ENODATA)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
/* Fetch register REGNUM from the child process. If REGNUM is -1, do
|
|
this for all registers. */
|
|
void
|
|
s390_linux_nat_target::fetch_registers (struct regcache *regcache, int regnum)
|
|
{
|
|
pid_t tid = get_ptrace_pid (regcache_get_ptid (regcache));
|
|
|
|
if (regnum == -1 || S390_IS_GREGSET_REGNUM (regnum))
|
|
fetch_regs (regcache, tid);
|
|
|
|
if (regnum == -1 || S390_IS_FPREGSET_REGNUM (regnum))
|
|
fetch_fpregs (regcache, tid);
|
|
|
|
if (have_regset_last_break)
|
|
if (regnum == -1 || regnum == S390_LAST_BREAK_REGNUM)
|
|
fetch_regset (regcache, tid, NT_S390_LAST_BREAK, 8,
|
|
(gdbarch_ptr_bit (regcache->arch ()) == 32
|
|
? &s390_last_break_regset : &s390x_last_break_regset));
|
|
|
|
if (have_regset_system_call)
|
|
if (regnum == -1 || regnum == S390_SYSTEM_CALL_REGNUM)
|
|
fetch_regset (regcache, tid, NT_S390_SYSTEM_CALL, 4,
|
|
&s390_system_call_regset);
|
|
|
|
if (have_regset_tdb)
|
|
if (regnum == -1 || S390_IS_TDBREGSET_REGNUM (regnum))
|
|
fetch_regset (regcache, tid, NT_S390_TDB, s390_sizeof_tdbregset,
|
|
&s390_tdb_regset);
|
|
|
|
if (have_regset_vxrs)
|
|
{
|
|
if (regnum == -1 || (regnum >= S390_V0_LOWER_REGNUM
|
|
&& regnum <= S390_V15_LOWER_REGNUM))
|
|
fetch_regset (regcache, tid, NT_S390_VXRS_LOW, 16 * 8,
|
|
&s390_vxrs_low_regset);
|
|
if (regnum == -1 || (regnum >= S390_V16_REGNUM
|
|
&& regnum <= S390_V31_REGNUM))
|
|
fetch_regset (regcache, tid, NT_S390_VXRS_HIGH, 16 * 16,
|
|
&s390_vxrs_high_regset);
|
|
}
|
|
|
|
if (have_regset_gs)
|
|
{
|
|
if (regnum == -1 || (regnum >= S390_GSD_REGNUM
|
|
&& regnum <= S390_GSEPLA_REGNUM))
|
|
fetch_regset (regcache, tid, NT_S390_GS_CB, 4 * 8,
|
|
&s390_gs_regset);
|
|
if (regnum == -1 || (regnum >= S390_BC_GSD_REGNUM
|
|
&& regnum <= S390_BC_GSEPLA_REGNUM))
|
|
fetch_regset (regcache, tid, NT_S390_GS_BC, 4 * 8,
|
|
&s390_gsbc_regset);
|
|
}
|
|
}
|
|
|
|
/* Store register REGNUM back into the child process. If REGNUM is
|
|
-1, do this for all registers. */
|
|
void
|
|
s390_linux_nat_target::store_registers (struct regcache *regcache, int regnum)
|
|
{
|
|
pid_t tid = get_ptrace_pid (regcache_get_ptid (regcache));
|
|
|
|
if (regnum == -1 || S390_IS_GREGSET_REGNUM (regnum))
|
|
store_regs (regcache, tid, regnum);
|
|
|
|
if (regnum == -1 || S390_IS_FPREGSET_REGNUM (regnum))
|
|
store_fpregs (regcache, tid, regnum);
|
|
|
|
/* S390_LAST_BREAK_REGNUM is read-only. */
|
|
|
|
if (have_regset_system_call)
|
|
if (regnum == -1 || regnum == S390_SYSTEM_CALL_REGNUM)
|
|
store_regset (regcache, tid, NT_S390_SYSTEM_CALL, 4,
|
|
&s390_system_call_regset);
|
|
|
|
if (have_regset_vxrs)
|
|
{
|
|
if (regnum == -1 || (regnum >= S390_V0_LOWER_REGNUM
|
|
&& regnum <= S390_V15_LOWER_REGNUM))
|
|
store_regset (regcache, tid, NT_S390_VXRS_LOW, 16 * 8,
|
|
&s390_vxrs_low_regset);
|
|
if (regnum == -1 || (regnum >= S390_V16_REGNUM
|
|
&& regnum <= S390_V31_REGNUM))
|
|
store_regset (regcache, tid, NT_S390_VXRS_HIGH, 16 * 16,
|
|
&s390_vxrs_high_regset);
|
|
}
|
|
}
|
|
|
|
|
|
/* Hardware-assisted watchpoint handling. */
|
|
|
|
/* For each process we maintain a list of all currently active
|
|
watchpoints, in order to properly handle watchpoint removal.
|
|
|
|
The only thing we actually need is the total address space area
|
|
spanned by the watchpoints. */
|
|
|
|
typedef struct watch_area
|
|
{
|
|
CORE_ADDR lo_addr;
|
|
CORE_ADDR hi_addr;
|
|
} s390_watch_area;
|
|
|
|
DEF_VEC_O (s390_watch_area);
|
|
|
|
/* Hardware debug state. */
|
|
|
|
struct s390_debug_reg_state
|
|
{
|
|
VEC_s390_watch_area *watch_areas;
|
|
VEC_s390_watch_area *break_areas;
|
|
};
|
|
|
|
/* Per-process data. */
|
|
|
|
struct s390_process_info
|
|
{
|
|
struct s390_process_info *next;
|
|
pid_t pid;
|
|
struct s390_debug_reg_state state;
|
|
};
|
|
|
|
static struct s390_process_info *s390_process_list = NULL;
|
|
|
|
/* Find process data for process PID. */
|
|
|
|
static struct s390_process_info *
|
|
s390_find_process_pid (pid_t pid)
|
|
{
|
|
struct s390_process_info *proc;
|
|
|
|
for (proc = s390_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 s390_process_info *
|
|
s390_add_process (pid_t pid)
|
|
{
|
|
struct s390_process_info *proc = XCNEW (struct s390_process_info);
|
|
|
|
proc->pid = pid;
|
|
proc->next = s390_process_list;
|
|
s390_process_list = proc;
|
|
|
|
return proc;
|
|
}
|
|
|
|
/* Get data specific info for process PID, creating it if necessary.
|
|
Never returns NULL. */
|
|
|
|
static struct s390_process_info *
|
|
s390_process_info_get (pid_t pid)
|
|
{
|
|
struct s390_process_info *proc;
|
|
|
|
proc = s390_find_process_pid (pid);
|
|
if (proc == NULL)
|
|
proc = s390_add_process (pid);
|
|
|
|
return proc;
|
|
}
|
|
|
|
/* Get hardware debug state for process PID. */
|
|
|
|
static struct s390_debug_reg_state *
|
|
s390_get_debug_reg_state (pid_t pid)
|
|
{
|
|
return &s390_process_info_get (pid)->state;
|
|
}
|
|
|
|
/* Called whenever GDB is no longer debugging process PID. It deletes
|
|
data structures that keep track of hardware debug state. */
|
|
|
|
static void
|
|
s390_forget_process (pid_t pid)
|
|
{
|
|
struct s390_process_info *proc, **proc_link;
|
|
|
|
proc = s390_process_list;
|
|
proc_link = &s390_process_list;
|
|
|
|
while (proc != NULL)
|
|
{
|
|
if (proc->pid == pid)
|
|
{
|
|
VEC_free (s390_watch_area, proc->state.watch_areas);
|
|
VEC_free (s390_watch_area, proc->state.break_areas);
|
|
*proc_link = proc->next;
|
|
xfree (proc);
|
|
return;
|
|
}
|
|
|
|
proc_link = &proc->next;
|
|
proc = *proc_link;
|
|
}
|
|
}
|
|
|
|
/* linux_nat_new_fork hook. */
|
|
|
|
static void
|
|
s390_linux_new_fork (struct lwp_info *parent, pid_t child_pid)
|
|
{
|
|
pid_t parent_pid;
|
|
struct s390_debug_reg_state *parent_state;
|
|
struct s390_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 (lwp_arch_private_info (parent) == NULL)
|
|
return;
|
|
|
|
/* GDB core assumes the child inherits the watchpoints/hw breakpoints of
|
|
the parent. So copy the debug state from parent to child. */
|
|
|
|
parent_pid = ptid_get_pid (parent->ptid);
|
|
parent_state = s390_get_debug_reg_state (parent_pid);
|
|
child_state = s390_get_debug_reg_state (child_pid);
|
|
|
|
child_state->watch_areas = VEC_copy (s390_watch_area,
|
|
parent_state->watch_areas);
|
|
child_state->break_areas = VEC_copy (s390_watch_area,
|
|
parent_state->break_areas);
|
|
}
|
|
|
|
/* Dump PER state. */
|
|
|
|
static void
|
|
s390_show_debug_regs (int tid, const char *where)
|
|
{
|
|
per_struct per_info;
|
|
ptrace_area parea;
|
|
|
|
parea.len = sizeof (per_info);
|
|
parea.process_addr = (addr_t) &per_info;
|
|
parea.kernel_addr = offsetof (struct user_regs_struct, per_info);
|
|
|
|
if (ptrace (PTRACE_PEEKUSR_AREA, tid, &parea, 0) < 0)
|
|
perror_with_name (_("Couldn't retrieve debug regs"));
|
|
|
|
debug_printf ("PER (debug) state for %d -- %s\n"
|
|
" cr9-11: %lx %lx %lx\n"
|
|
" start, end: %lx %lx\n"
|
|
" code/ATMID: %x address: %lx PAID: %x\n",
|
|
tid,
|
|
where,
|
|
per_info.control_regs.words.cr[0],
|
|
per_info.control_regs.words.cr[1],
|
|
per_info.control_regs.words.cr[2],
|
|
per_info.starting_addr,
|
|
per_info.ending_addr,
|
|
per_info.lowcore.words.perc_atmid,
|
|
per_info.lowcore.words.address,
|
|
per_info.lowcore.words.access_id);
|
|
}
|
|
|
|
int
|
|
s390_linux_nat_target::stopped_by_watchpoint ()
|
|
{
|
|
struct s390_debug_reg_state *state
|
|
= s390_get_debug_reg_state (ptid_get_pid (inferior_ptid));
|
|
per_lowcore_bits per_lowcore;
|
|
ptrace_area parea;
|
|
int result;
|
|
|
|
if (show_debug_regs)
|
|
s390_show_debug_regs (s390_inferior_tid (), "stop");
|
|
|
|
/* Speed up common case. */
|
|
if (VEC_empty (s390_watch_area, state->watch_areas))
|
|
return 0;
|
|
|
|
parea.len = sizeof (per_lowcore);
|
|
parea.process_addr = (addr_t) & per_lowcore;
|
|
parea.kernel_addr = offsetof (struct user_regs_struct, per_info.lowcore);
|
|
if (ptrace (PTRACE_PEEKUSR_AREA, s390_inferior_tid (), &parea, 0) < 0)
|
|
perror_with_name (_("Couldn't retrieve watchpoint status"));
|
|
|
|
result = (per_lowcore.perc_storage_alteration == 1
|
|
&& per_lowcore.perc_store_real_address == 0);
|
|
|
|
if (result)
|
|
{
|
|
/* Do not report this watchpoint again. */
|
|
memset (&per_lowcore, 0, sizeof (per_lowcore));
|
|
if (ptrace (PTRACE_POKEUSR_AREA, s390_inferior_tid (), &parea, 0) < 0)
|
|
perror_with_name (_("Couldn't clear watchpoint status"));
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/* Each time before resuming a thread, update its PER info. */
|
|
|
|
static void
|
|
s390_prepare_to_resume (struct lwp_info *lp)
|
|
{
|
|
int tid;
|
|
pid_t pid = ptid_get_pid (ptid_of_lwp (lp));
|
|
|
|
per_struct per_info;
|
|
ptrace_area parea;
|
|
|
|
CORE_ADDR watch_lo_addr = (CORE_ADDR)-1, watch_hi_addr = 0;
|
|
unsigned ix;
|
|
s390_watch_area *area;
|
|
struct arch_lwp_info *lp_priv = lwp_arch_private_info (lp);
|
|
struct s390_debug_reg_state *state = s390_get_debug_reg_state (pid);
|
|
int step = lwp_is_stepping (lp);
|
|
|
|
/* Nothing to do if there was never any PER info for this thread. */
|
|
if (lp_priv == NULL)
|
|
return;
|
|
|
|
/* If PER info has changed, update it. When single-stepping, disable
|
|
hardware breakpoints (if any). Otherwise we're done. */
|
|
if (!lp_priv->per_info_changed)
|
|
{
|
|
if (!step || VEC_empty (s390_watch_area, state->break_areas))
|
|
return;
|
|
}
|
|
|
|
lp_priv->per_info_changed = 0;
|
|
|
|
tid = ptid_get_lwp (ptid_of_lwp (lp));
|
|
if (tid == 0)
|
|
tid = pid;
|
|
|
|
parea.len = sizeof (per_info);
|
|
parea.process_addr = (addr_t) & per_info;
|
|
parea.kernel_addr = offsetof (struct user_regs_struct, per_info);
|
|
|
|
/* Clear PER info, but adjust the single_step field (used by older
|
|
kernels only). */
|
|
memset (&per_info, 0, sizeof (per_info));
|
|
per_info.single_step = (step != 0);
|
|
|
|
if (!VEC_empty (s390_watch_area, state->watch_areas))
|
|
{
|
|
for (ix = 0;
|
|
VEC_iterate (s390_watch_area, state->watch_areas, ix, area);
|
|
ix++)
|
|
{
|
|
watch_lo_addr = std::min (watch_lo_addr, area->lo_addr);
|
|
watch_hi_addr = std::max (watch_hi_addr, area->hi_addr);
|
|
}
|
|
|
|
/* Enable storage-alteration events. */
|
|
per_info.control_regs.words.cr[0] |= (PER_EVENT_STORE
|
|
| PER_CONTROL_ALTERATION);
|
|
}
|
|
|
|
if (!VEC_empty (s390_watch_area, state->break_areas))
|
|
{
|
|
/* Don't install hardware breakpoints while single-stepping, since
|
|
our PER settings (e.g. the nullification bit) might then conflict
|
|
with the kernel's. But re-install them afterwards. */
|
|
if (step)
|
|
lp_priv->per_info_changed = 1;
|
|
else
|
|
{
|
|
for (ix = 0;
|
|
VEC_iterate (s390_watch_area, state->break_areas, ix, area);
|
|
ix++)
|
|
{
|
|
watch_lo_addr = std::min (watch_lo_addr, area->lo_addr);
|
|
watch_hi_addr = std::max (watch_hi_addr, area->hi_addr);
|
|
}
|
|
|
|
/* If there's just one breakpoint, enable instruction-fetching
|
|
nullification events for the breakpoint address (fast).
|
|
Otherwise stop after any instruction within the PER area and
|
|
after any branch into it (slow). */
|
|
if (watch_hi_addr == watch_lo_addr)
|
|
per_info.control_regs.words.cr[0] |= (PER_EVENT_NULLIFICATION
|
|
| PER_EVENT_IFETCH);
|
|
else
|
|
{
|
|
/* The PER area must include the instruction before the
|
|
first breakpoint address. */
|
|
watch_lo_addr = watch_lo_addr > 6 ? watch_lo_addr - 6 : 0;
|
|
per_info.control_regs.words.cr[0]
|
|
|= (PER_EVENT_BRANCH
|
|
| PER_EVENT_IFETCH
|
|
| PER_CONTROL_BRANCH_ADDRESS);
|
|
}
|
|
}
|
|
}
|
|
per_info.starting_addr = watch_lo_addr;
|
|
per_info.ending_addr = watch_hi_addr;
|
|
|
|
if (ptrace (PTRACE_POKEUSR_AREA, tid, &parea, 0) < 0)
|
|
perror_with_name (_("Couldn't modify watchpoint status"));
|
|
|
|
if (show_debug_regs)
|
|
s390_show_debug_regs (tid, "resume");
|
|
}
|
|
|
|
/* Mark the PER info as changed, so the next resume will update it. */
|
|
|
|
static void
|
|
s390_mark_per_info_changed (struct lwp_info *lp)
|
|
{
|
|
if (lwp_arch_private_info (lp) == NULL)
|
|
lwp_set_arch_private_info (lp, XCNEW (struct arch_lwp_info));
|
|
|
|
lwp_arch_private_info (lp)->per_info_changed = 1;
|
|
}
|
|
|
|
/* When attaching to a new thread, mark its PER info as changed. */
|
|
|
|
static void
|
|
s390_new_thread (struct lwp_info *lp)
|
|
{
|
|
s390_mark_per_info_changed (lp);
|
|
}
|
|
|
|
/* Function to call when a thread is being deleted. */
|
|
|
|
static void
|
|
s390_delete_thread (struct arch_lwp_info *arch_lwp)
|
|
{
|
|
xfree (arch_lwp);
|
|
}
|
|
|
|
/* Iterator callback for s390_refresh_per_info. */
|
|
|
|
static int
|
|
s390_refresh_per_info_cb (struct lwp_info *lp, void *arg)
|
|
{
|
|
s390_mark_per_info_changed (lp);
|
|
|
|
if (!lwp_is_stopped (lp))
|
|
linux_stop_lwp (lp);
|
|
return 0;
|
|
}
|
|
|
|
/* Make sure that threads are stopped and mark PER info as changed. */
|
|
|
|
static int
|
|
s390_refresh_per_info (void)
|
|
{
|
|
ptid_t pid_ptid = pid_to_ptid (ptid_get_pid (current_lwp_ptid ()));
|
|
|
|
iterate_over_lwps (pid_ptid, s390_refresh_per_info_cb, NULL);
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
s390_linux_nat_target::insert_watchpoint (CORE_ADDR addr, int len,
|
|
enum target_hw_bp_type type,
|
|
struct expression *cond)
|
|
{
|
|
s390_watch_area area;
|
|
struct s390_debug_reg_state *state
|
|
= s390_get_debug_reg_state (ptid_get_pid (inferior_ptid));
|
|
|
|
area.lo_addr = addr;
|
|
area.hi_addr = addr + len - 1;
|
|
VEC_safe_push (s390_watch_area, state->watch_areas, &area);
|
|
|
|
return s390_refresh_per_info ();
|
|
}
|
|
|
|
int
|
|
s390_linux_nat_target::remove_watchpoint (CORE_ADDR addr, int len,
|
|
enum target_hw_bp_type type,
|
|
struct expression *cond)
|
|
{
|
|
unsigned ix;
|
|
s390_watch_area *area;
|
|
struct s390_debug_reg_state *state
|
|
= s390_get_debug_reg_state (ptid_get_pid (inferior_ptid));
|
|
|
|
for (ix = 0;
|
|
VEC_iterate (s390_watch_area, state->watch_areas, ix, area);
|
|
ix++)
|
|
{
|
|
if (area->lo_addr == addr && area->hi_addr == addr + len - 1)
|
|
{
|
|
VEC_unordered_remove (s390_watch_area, state->watch_areas, ix);
|
|
return s390_refresh_per_info ();
|
|
}
|
|
}
|
|
|
|
fprintf_unfiltered (gdb_stderr,
|
|
"Attempt to remove nonexistent watchpoint.\n");
|
|
return -1;
|
|
}
|
|
|
|
/* Implement the "can_use_hw_breakpoint" target_ops method. */
|
|
|
|
int
|
|
s390_linux_nat_target::can_use_hw_breakpoint (enum bptype type,
|
|
int cnt, int othertype)
|
|
{
|
|
if (type == bp_hardware_watchpoint || type == bp_hardware_breakpoint)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
/* Implement the "insert_hw_breakpoint" target_ops method. */
|
|
|
|
int
|
|
s390_linux_nat_target::insert_hw_breakpoint (struct gdbarch *gdbarch,
|
|
struct bp_target_info *bp_tgt)
|
|
{
|
|
s390_watch_area area;
|
|
struct s390_debug_reg_state *state;
|
|
|
|
area.lo_addr = bp_tgt->placed_address = bp_tgt->reqstd_address;
|
|
area.hi_addr = area.lo_addr;
|
|
state = s390_get_debug_reg_state (ptid_get_pid (inferior_ptid));
|
|
VEC_safe_push (s390_watch_area, state->break_areas, &area);
|
|
|
|
return s390_refresh_per_info ();
|
|
}
|
|
|
|
/* Implement the "remove_hw_breakpoint" target_ops method. */
|
|
|
|
int
|
|
s390_linux_nat_target::remove_hw_breakpoint (struct gdbarch *gdbarch,
|
|
struct bp_target_info *bp_tgt)
|
|
{
|
|
unsigned ix;
|
|
struct watch_area *area;
|
|
struct s390_debug_reg_state *state;
|
|
|
|
state = s390_get_debug_reg_state (ptid_get_pid (inferior_ptid));
|
|
for (ix = 0;
|
|
VEC_iterate (s390_watch_area, state->break_areas, ix, area);
|
|
ix++)
|
|
{
|
|
if (area->lo_addr == bp_tgt->placed_address)
|
|
{
|
|
VEC_unordered_remove (s390_watch_area, state->break_areas, ix);
|
|
return s390_refresh_per_info ();
|
|
}
|
|
}
|
|
|
|
fprintf_unfiltered (gdb_stderr,
|
|
"Attempt to remove nonexistent breakpoint.\n");
|
|
return -1;
|
|
}
|
|
|
|
int
|
|
s390_linux_nat_target::region_ok_for_hw_watchpoint (CORE_ADDR addr, int cnt)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
static int
|
|
s390_target_wordsize (void)
|
|
{
|
|
int wordsize = 4;
|
|
|
|
/* Check for 64-bit inferior process. This is the case when the host is
|
|
64-bit, and in addition bit 32 of the PSW mask is set. */
|
|
#ifdef __s390x__
|
|
long pswm;
|
|
|
|
errno = 0;
|
|
pswm = (long) ptrace (PTRACE_PEEKUSER, s390_inferior_tid (), PT_PSWMASK, 0);
|
|
if (errno == 0 && (pswm & 0x100000000ul) != 0)
|
|
wordsize = 8;
|
|
#endif
|
|
|
|
return wordsize;
|
|
}
|
|
|
|
int
|
|
s390_linux_nat_target::auxv_parse (gdb_byte **readptr,
|
|
gdb_byte *endptr, CORE_ADDR *typep,
|
|
CORE_ADDR *valp)
|
|
{
|
|
int sizeof_auxv_field = s390_target_wordsize ();
|
|
enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ());
|
|
gdb_byte *ptr = *readptr;
|
|
|
|
if (endptr == ptr)
|
|
return 0;
|
|
|
|
if (endptr - ptr < sizeof_auxv_field * 2)
|
|
return -1;
|
|
|
|
*typep = extract_unsigned_integer (ptr, sizeof_auxv_field, byte_order);
|
|
ptr += sizeof_auxv_field;
|
|
*valp = extract_unsigned_integer (ptr, sizeof_auxv_field, byte_order);
|
|
ptr += sizeof_auxv_field;
|
|
|
|
*readptr = ptr;
|
|
return 1;
|
|
}
|
|
|
|
const struct target_desc *
|
|
s390_linux_nat_target::read_description ()
|
|
{
|
|
int tid = s390_inferior_tid ();
|
|
|
|
have_regset_last_break
|
|
= check_regset (tid, NT_S390_LAST_BREAK, 8);
|
|
have_regset_system_call
|
|
= check_regset (tid, NT_S390_SYSTEM_CALL, 4);
|
|
|
|
/* If GDB itself is compiled as 64-bit, we are running on a machine in
|
|
z/Architecture mode. If the target is running in 64-bit addressing
|
|
mode, report s390x architecture. If the target is running in 31-bit
|
|
addressing mode, but the kernel supports using 64-bit registers in
|
|
that mode, report s390 architecture with 64-bit GPRs. */
|
|
#ifdef __s390x__
|
|
{
|
|
CORE_ADDR hwcap = 0;
|
|
|
|
target_auxv_search (target_stack, AT_HWCAP, &hwcap);
|
|
have_regset_tdb = (hwcap & HWCAP_S390_TE)
|
|
&& check_regset (tid, NT_S390_TDB, s390_sizeof_tdbregset);
|
|
|
|
have_regset_vxrs = (hwcap & HWCAP_S390_VX)
|
|
&& check_regset (tid, NT_S390_VXRS_LOW, 16 * 8)
|
|
&& check_regset (tid, NT_S390_VXRS_HIGH, 16 * 16);
|
|
|
|
have_regset_gs = (hwcap & HWCAP_S390_GS)
|
|
&& check_regset (tid, NT_S390_GS_CB, 4 * 8)
|
|
&& check_regset (tid, NT_S390_GS_BC, 4 * 8);
|
|
|
|
if (s390_target_wordsize () == 8)
|
|
return (have_regset_gs ? tdesc_s390x_gs_linux64 :
|
|
have_regset_vxrs ?
|
|
(have_regset_tdb ? tdesc_s390x_tevx_linux64 :
|
|
tdesc_s390x_vx_linux64) :
|
|
have_regset_tdb ? tdesc_s390x_te_linux64 :
|
|
have_regset_system_call ? tdesc_s390x_linux64v2 :
|
|
have_regset_last_break ? tdesc_s390x_linux64v1 :
|
|
tdesc_s390x_linux64);
|
|
|
|
if (hwcap & HWCAP_S390_HIGH_GPRS)
|
|
return (have_regset_gs ? tdesc_s390_gs_linux64 :
|
|
have_regset_vxrs ?
|
|
(have_regset_tdb ? tdesc_s390_tevx_linux64 :
|
|
tdesc_s390_vx_linux64) :
|
|
have_regset_tdb ? tdesc_s390_te_linux64 :
|
|
have_regset_system_call ? tdesc_s390_linux64v2 :
|
|
have_regset_last_break ? tdesc_s390_linux64v1 :
|
|
tdesc_s390_linux64);
|
|
}
|
|
#endif
|
|
|
|
/* If GDB itself is compiled as 31-bit, or if we're running a 31-bit inferior
|
|
on a 64-bit kernel that does not support using 64-bit registers in 31-bit
|
|
mode, report s390 architecture with 32-bit GPRs. */
|
|
return (have_regset_system_call? tdesc_s390_linux32v2 :
|
|
have_regset_last_break? tdesc_s390_linux32v1 :
|
|
tdesc_s390_linux32);
|
|
}
|
|
|
|
void
|
|
_initialize_s390_nat (void)
|
|
{
|
|
struct target_ops *t = &the_s390_linux_nat_target;
|
|
|
|
/* Register the target. */
|
|
linux_target = &the_s390_linux_nat_target;
|
|
add_target (t);
|
|
linux_nat_set_new_thread (t, s390_new_thread);
|
|
linux_nat_set_delete_thread (t, s390_delete_thread);
|
|
linux_nat_set_prepare_to_resume (t, s390_prepare_to_resume);
|
|
linux_nat_set_forget_process (t, s390_forget_process);
|
|
linux_nat_set_new_fork (t, s390_linux_new_fork);
|
|
|
|
/* A maintenance command to enable showing the PER state. */
|
|
add_setshow_boolean_cmd ("show-debug-regs", class_maintenance,
|
|
&show_debug_regs, _("\
|
|
Set whether to show the PER (debug) hardware state."), _("\
|
|
Show whether to show the PER (debug) hardware state."), _("\
|
|
Use \"on\" to enable, \"off\" to disable.\n\
|
|
If enabled, the PER state is shown after it is changed by GDB,\n\
|
|
and when the inferior triggers a breakpoint or watchpoint."),
|
|
NULL,
|
|
NULL,
|
|
&maintenance_set_cmdlist,
|
|
&maintenance_show_cmdlist);
|
|
}
|