darling-gdb/gdb/monitor.c
Pedro Alves 6c95b8df7f 2009-10-19 Pedro Alves <pedro@codesourcery.com>
Stan Shebs	<stan@codesourcery.com>

	Add base multi-executable/process support to GDB.

	gdb/
	* Makefile.in (SFILES): Add progspace.c.
	(COMMON_OBS): Add progspace.o.
	* progspace.h: New.
	* progspace.c: New.

	* breakpoint.h (struct bp_target_info) <placed_address_space>: New
	field.
	(struct bp_location) <pspace>: New field.
	(struct breakpoint) <pspace>: New field.
	(bpstat_stop_status, breakpoint_here_p)
	(moribund_breakpoint_here_p, breakpoint_inserted_here_p)
	(regular_breakpoint_inserted_here_p)
	(software_breakpoint_inserted_here_p, breakpoint_thread_match)
	(set_default_breakpoint): Adjust prototypes.
	(remove_breakpoints_pid, breakpoint_program_space_exit): Declare.
	(insert_single_step_breakpoint, deprecated_insert_raw_breakpoint):
	Adjust prototypes.
	* breakpoint.c (executing_startup): Delete.
	(default_breakpoint_sspace): New.
	(breakpoint_restore_shadows): Skip if the address space doesn't
	match.
	(update_watchpoint): Record the frame's program space in the
	breakpoint location.
	(insert_bp_location): Record the address space in target_info.
	Adjust to pass the symbol space to solib_name_from_address.
	(breakpoint_program_space_exit): New.
	(insert_breakpoint_locations): Switch the symbol space and thread
	when inserting breakpoints.  Don't insert breakpoints in a vfork
	parent waiting for vfork done if we're not attached to the vfork
	child.
	(remove_breakpoints_pid): New.
	(reattach_breakpoints): Switch to a thread of PID.  Ignore
	breakpoints of other symbol spaces.
	(create_internal_breakpoint): Store the symbol space in the sal.
	(create_longjmp_master_breakpoint): Iterate over all symbol
	spaces.
	(update_breakpoints_after_exec): Ignore breakpoints for other
	symbol spaces.
	(remove_breakpoint): Rename to ...
	(remove_breakpoint_1): ... this.  Pass the breakpoints symbol
	space to solib_name_from_address.
	(remove_breakpoint): New.
	(mark_breakpoints_out): Ignore breakpoints from other symbol
	spaces.
	(breakpoint_init_inferior): Ditto.
	(breakpoint_here_p): Add an address space argument and adjust to
	use breakpoint_address_match.
	(moribund_breakpoint_here_p): Ditto.
	(regular_breakpoint_inserted_here_p): Ditto.
	(breakpoint_inserted_here_p): Ditto.
	(software_breakpoint_inserted_here_p): Ditto.
	(breakpoint_thread_match): Ditto.
	(bpstat_check_location): Ditto.
	(bpstat_stop_status): Ditto.
	(print_breakpoint_location): If there's a location to print,
	switch the current symbol space.
	(print_one_breakpoint_location): Add `allflag' argument.
	(print_one_breakpoint): Ditto.	Adjust.
	(do_captured_breakpoint_query): Adjust.
	(breakpoint_1): Adjust.
	(breakpoint_has_pc): Also match the symbol space.
	(describe_other_breakpoints): Add a symbol space argument and
	adjust.
	(set_default_breakpoint): Add a symbol space argument.	Set
	default_breakpoint_sspace.
	(breakpoint_address_match): New.
	(check_duplicates_for): Add an address space argument, and adjust.
	(set_raw_breakpoint): Record the symbol space in the location and
	in the breakpoint.
	(set_longjmp_breakpoint): Skip longjmp master breakpoints from
	other symbol spaces.
	(remove_thread_event_breakpoints, remove_solib_event_breakpoints)
	(disable_breakpoints_in_shlibs): Skip breakpoints from other
	symbol spaces.
	(disable_breakpoints_in_unloaded_shlib): Match symbol spaces.
	(create_catchpoint): Set the symbol space in the sal.
	(disable_breakpoints_before_startup): Skip breakpoints from other
	symbol spaces.	Set executing_startup in the current symbol space.
	(enable_breakpoints_after_startup): Clear executing_startup in the
	current symbol space.  Skip breakpoints from other symbol spaces.
	(clone_momentary_breakpoint): Also copy the symbol space.
	(add_location_to_breakpoint): Set the location's symbol space.
	(bp_loc_is_permanent): Switch thread and symbol space.
	(create_breakpoint): Adjust.
	(expand_line_sal_maybe): Expand comment to mention symbol spaces.
	Switch thread and symbol space when reading memory.
	(parse_breakpoint_sals): Set the symbol space in the sal.
	(break_command_really): Ditto.
	(skip_prologue_sal): Switch and space.
	(resolve_sal_pc): Ditto.
	(watch_command_1): Record the symbol space in the sal.
	(create_ada_exception_breakpoint): Adjust.
	(clear_command): Adjust.  Match symbol spaces.
	(update_global_location_list): Use breakpoint_address_match.
	(breakpoint_re_set_one): Switch thread and space.
	(breakpoint_re_set): Save symbol space.
	(breakpoint_re_set_thread): Also reset the symbol space.
	(deprecated_insert_raw_breakpoint): Add an address space argument.
	Adjust.
	(insert_single_step_breakpoint): Ditto.
	(single_step_breakpoint_inserted_here_p): Ditto.
	(clear_syscall_counts): New.
	(_initialize_breakpoint): Install it as inferior_exit observer.

	* exec.h: Include "progspace.h".
	(exec_bfd, exec_bfd_mtime): New defines.
	(exec_close): Declare.
	* exec.c: Include "gdbthread.h" and "progspace.h".
	(exec_bfd, exec_bfd_mtime, current_target_sections_1): Delete.
	(using_exec_ops): New.
	(exec_close_1): Rename to exec_close, and make public.
	(exec_close): Rename to exec_close_1, and adjust all callers.  Add
	description.  Remove target sections and close executables from
	all program spaces.
	(exec_file_attach): Add comment.
	(add_target_sections): Check on `using_exec_ops' to check if the
	target should be pushed.
	(remove_target_sections): Only unpush the target if there are no
	more target sections in any symbol space.
	* gdbcore.h: Include "exec.h".
	(exec_bfd, exec_bfd_mtime): Remove declarations.

	* frame.h (get_frame_program_space, get_frame_address_space)
	(frame_unwind_program_space): Declare.
	* frame.c (struct frame_info) <pspace, aspace>: New fields.
	(create_sentinel_frame): Add program space argument.  Set the
	pspace and aspace fields of the frame object.
	(get_current_frame, create_new_frame): Adjust.
	(get_frame_program_space): New.
	(frame_unwind_program_space): New.
	(get_frame_address_space): New.
	* stack.c (print_frame_info): Adjust.
	(print_frame): Use the frame's program space.

	* gdbthread.h (any_live_thread_of_process): Declare.
	* thread.c (any_live_thread_of_process): New.
	(switch_to_thread): Switch the program space as well.
	(restore_selected_frame): Don't warn if trying to restore frame
	level 0.

	* inferior.h: Include "progspace.h".
	(detach_fork): Declare.
	(struct inferior) <removable, aspace, pspace>
	<vfork_parent, vfork_child, pending_detach>
	<waiting_for_vfork_done>: New fields.
	<terminal_info>: Remove field.
	<data, num_data>: New fields.
	(register_inferior_data, register_inferior_data_with_cleanup)
	(clear_inferior_data, set_inferior_data, inferior_data): Declare.
	(exit_inferior, exit_inferior_silent, exit_inferior_num_silent)
	(inferior_appeared): Declare.
	(find_inferior_pid): Typo.
	(find_inferior_id, find_inferior_for_program_space): Declare.
	(set_current_inferior, save_current_inferior, prune_inferiors)
	(number_of_inferiors): Declare.
	(inferior_list): Declare.
	* inferior.c: Include "gdbcore.h" and "symfile.h".
	(inferior_list): Make public.
	(delete_inferior_1): Always delete thread silently.
	(find_inferior_id): Make public.
	(current_inferior_): New.
	(current_inferior): Use it.
	(set_current_inferior): New.
	(restore_inferior): New.
	(save_current_inferior): New.
	(free_inferior): Free the per-inferior data.
	(add_inferior_silent): Allocate per-inferior data.
	Call inferior_appeared.
	(delete_threads_of_inferior): New.
	(delete_inferior_1): Adjust interface to take an inferior pointer.
	(delete_inferior): Adjust.
	(delete_inferior_silent): Adjust.
	(exit_inferior_1): New.
	(exit_inferior): New.
	(exit_inferior_silent): New.
	(exit_inferior_num_silent): New.
	(detach_inferior): Adjust.
	(inferior_appeared): New.
	(discard_all_inferiors): Adjust.
	(find_inferior_id): Make public.  Assert pid is not zero.
	(find_inferior_for_program_space): New.
	(have_inferiors): Check if we have any inferior with pid not zero.
	(have_live_inferiors): Go over all pushed targets looking for
	process_stratum.
	(prune_inferiors): New.
	(number_of_inferiors): New.
	(print_inferior): Add executable column.  Print vfork parent/child
	relationships.
	(inferior_command): Adjust to cope with not running inferiors.
	(remove_inferior_command): New.
	(add_inferior_command): New.
	(clone_inferior_command): New.
	(struct inferior_data): New.
	(struct inferior_data_registration): New.
	(struct inferior_data_registry): New.
	(inferior_data_registry): New.
	(register_inferior_data_with_cleanup): New.
	(register_inferior_data): New.
	(inferior_alloc_data): New.
	(inferior_free_data): New.
	(clear_inferior_data): New.
	(set_inferior_data): New.
	(inferior_data): New.
	(initialize_inferiors): New.
	(_initialize_inferiors): Register "add-inferior",
	"remove-inferior" and "clone-inferior" commands.

	* objfiles.h: Include "progspace.h".
	(struct objfile) <pspace>: New field.
	(symfile_objfile, object_files): Don't declare.
	(ALL_PSPACE_OBJFILES): New.
	(ALL_PSPACE_OBJFILES_SAFE): New.
	(ALL_OBJFILES, ALL_OBJFILES_SAFE): Adjust.
	(ALL_PSPACE_SYMTABS): New.
	(ALL_PRIMARY_SYMTABS): Adjust.
	(ALL_PSPACE_PRIMARY_SYMTABS): New.
	(ALL_PSYMTABS): Adjust.
	(ALL_PSPACE_PSYMTABS): New.
	* objfiles.c (object_files, symfile_objfile): Delete.
	(struct objfile_sspace_info): New.
	(objfiles_pspace_data): New.
	(objfiles_pspace_data_cleanup): New.
	(get_objfile_pspace_data): New.
	(objfiles_changed_p): Delete.
	(allocate_objfile): Set the objfile's program space.  Adjust to
	reference objfiles_changed_p in pspace data.
	(free_objfile): Adjust to reference objfiles_changed_p in pspace
	data.
	(objfile_relocate): Ditto.
	(update_section_map): Add pspace argument.  Adjust to iterate over
	objfiles in the passed in pspace.
	(find_pc_section): Delete sections and num_sections statics.
	Adjust to refer to program space's objfiles_changed_p.	Adjust to
	refer to sections and num_sections store in the objfile's pspace
	data.
	(objfiles_changed): Adjust to reference objfiles_changed_p in
	pspace data.
	(_initialize_objfiles): New.
	* linespec.c (decode_all_digits, decode_dollar): Set the sal's
	program space.
	* source.c (current_source_pspace): New.
	(get_current_source_symtab_and_line): Set the sal's program space.
	(set_current_source_symtab_and_line): Set current_source_pspace.
	(select_source_symtab): Ditto.	Use ALL_OBJFILES.
	(forget_cached_source_info): Iterate over all program spaces.
	* symfile.c (clear_symtab_users): Adjust.
	* symmisc.c (print_symbol_bcache_statistics): Iterate over all
	program spaces.
	(print_objfile_statistics): Ditto.
	(maintenance_print_msymbols): Ditto.
	(maintenance_print_objfiles): Ditto.
	(maintenance_info_symtabs): Ditto.
	(maintenance_info_psymtabs): Ditto.
	* symtab.h (SYMTAB_PSPACE): New.
	(struct symtab_and_line) <pspace>: New field.
	* symtab.c (init_sal): Clear the sal's program space.
	(find_pc_sect_symtab): Set the sal's program space.  Switch thread
	and space.
	(append_expanded_sal): Add program space argument.  Iterate over
	all program spaces.
	(expand_line_sal): Iterate over all program spaces.  Switch
	program space.

	* target.h (enum target_waitkind) <TARGET_WAITKIND_VFORK_DONE>: New.
	(struct target_ops) <to_thread_address_space>: New field.
	(target_thread_address_space): Define.
	* target.c (target_detach): Only remove breakpoints from the
	inferior we're detaching.
	(target_thread_address_space): New.

	* defs.h (initialize_progspace): Declare.
	* top.c (gdb_init): Call it.

	* solist.h (struct so_list) <sspace>: New field.
	* solib.h (struct program_space): Forward declare.
	(solib_name_from_address): Adjust prototype.
	* solib.c (so_list_head): Replace with a macro referencing the
	program space.
	(update_solib_list): Set the so's program space.
	(solib_name_from_address): Add a program space argument and adjust.

	* solib-svr4.c (struct svr4_info) <pid>: Delete field.
	<interp_text_sect_low, interp_text_sect_high, interp_plt_sect_low>
	<interp_plt_sect_high>: New fields.
	(svr4_info_p, svr4_info): Delete.
	(solib_svr4_sspace_data): New.
	(get_svr4_info): Rewrite.
	(svr4_sspace_data_cleanup): New.
	(open_symbol_file_object): Adjust.
	(svr4_default_sos): Adjust.
	(svr4_fetch_objfile_link_map): Adjust.
	(interp_text_sect_low, interp_text_sect_high, interp_plt_sect_low)
	(interp_plt_sect_high): Delete.
	(svr4_in_dynsym_resolve_code): Adjust.
	(enable_break): Adjust.
	(svr4_clear_solib): Revert bit that removed the svr4_info here,
	and reinstate clearing debug_base, debug_loader_offset_p,
	debug_loader_offset and debug_loader_name.
	(_initialize_svr4_solib): Register solib_svr4_pspace_data.  Don't
	install an inferior_exit observer anymore.

	* printcmd.c (struct display) <pspace>: New field.
	(display_command): Set the display's sspace.
	(do_one_display): Match the display's sspace.
	(display_uses_solib_p): Ditto.

	* linux-fork.c (detach_fork): Moved to infrun.c.
	(_initialize_linux_fork): Moved "detach-on-fork" command to
	infrun.c.
	* infrun.c (detach_fork): Moved from linux-fork.c.
	(proceed_after_vfork_done): New.
	(handle_vfork_child_exec_or_exit): New.
	(follow_exec_mode_replace, follow_exec_mode_keep)
	(follow_exec_mode_names, follow_exec_mode_string)
	(show_follow_exec_mode_string): New.
	(follow_exec): New.  Reinstate the mark_breakpoints_out call.
	Remove shared libraries before attaching new executable.  If user
	wants to keep the inferior, keep it.
	(displaced_step_fixup): Adjust to pass an address space to the
	breakpoints module.
	(resume): Ditto.
	(clear_proceed_status): In all-stop mode, always clear the proceed
	status of all threads.
	(prepare_to_proceed): Adjust to pass an address space to the
	breakpoints module.
	(proceed): Ditto.
	(adjust_pc_after_break): Ditto.
	(handle_inferior_event): When handling a process exit, switch the
	program space to the inferior's that had exited.  Call
	handle_vfork_child_exec_or_exit.  Adjust to pass an address space
	to the breakpoints module.  In non-stop mode, when following a
	fork and detach-fork is off, also resume the other branch.  Handle
	TARGET_WAITKIND_VFORK_DONE.  Set the program space in sals.
	(normal_stop): Prune inferiors.
	(_initialize_infrun): Install the new "follow-exec-mode" command.
	"detach-on-fork" moved here.

	* regcache.h (get_regcache_aspace): Declare.
	* regcache.c (struct regcache) <aspace>: New field.
	(regcache_xmalloc): Clear the aspace.
	(get_regcache_aspace): New.
	(regcache_cpy): Copy the aspace field.
	(regcache_cpy_no_passthrough): Ditto.
	(get_thread_regcache): Fetch the thread's address space from the
	target, and store it in the regcache.

	* infcall.c (call_function_by_hand): Set the sal's pspace.

	* arch-utils.c (default_has_shared_address_space): New.
	* arch-utils.h (default_has_shared_address_space): Declare.

	* gdbarch.sh (has_shared_address_space): New.
	* gdbarch.h, gdbarch.c: Regenerate.

	* linux-tdep.c: Include auxv.h, target.h, elf/common.h.
	(linux_has_shared_address_space): New.
	(_initialize_linux_tdep): Declare.

	* arm-tdep.c (arm_software_single_step): Pass the frame's address
	space to insert_single_step_breakpoint.
	* arm-linux-tdep.c (arm_linux_software_single_step): Pass the
	frame's pspace to breakpoint functions.
	* cris-tdep.c (crisv32_single_step_through_delay): Ditto.
	(cris_software_single_step): Ditto.
	* mips-tdep.c (deal_with_atomic_sequence): Add frame argument.
	Pass the frame's pspace to breakpoint functions.
	(mips_software_single_step): Adjust.
	(mips_single_step_through_delay): Adjust.
	* rs6000-aix-tdep.c (rs6000_software_single_step): Adjust.
	* rs6000-tdep.c (ppc_deal_with_atomic_sequence): Adjust.
	* solib-irix.c (enable_break): Adjust to pass the current frame's
	address space to breakpoint functions.
	* sparc-tdep.c (sparc_software_single_step): Ditto.
	* spu-tdep.c (spu_software_single_step): Ditto.
	* alpha-tdep.c (alpha_software_single_step): Ditto.
	* record.c (record_wait): Adjust to pass an address space to the
	breakpoints module.

	* fork-child.c (fork_inferior): Set the new inferior's program and
	address spaces.
	* inf-ptrace.c (inf_ptrace_follow_fork): Copy the parent's program
	and address spaces.
	(inf_ptrace_attach): Set the inferior's program and address spaces.
	* linux-nat.c: Include "solib.h".
	(linux_child_follow_fork): Manage parent and child's program and
	address spaces.	 Clone the parent's program space if necessary.
	Don't wait for the vfork to be done here.  Refuse to resume if
	following the vfork parent while leaving the child stopped.
	(resume_callback): Don't resume a vfork parent.
	(linux_nat_resume): Also check for pending events in the
	lp->waitstatus field.
	(linux_handle_extended_wait): Report TARGET_WAITKIND_VFORK_DONE
	events to the core.
	(stop_wait_callback): Don't wait for SIGSTOP on vfork parents.
	(cancel_breakpoint): Adjust.
	* linux-thread-db.c (thread_db_wait): Don't remove thread event
	breakpoints here.
	(thread_db_mourn_inferior): Don't mark breakpoints out here.
	Remove thread event breakpoints after mourning.
	* corelow.c: Include progspace.h.
	(core_open): Set the inferior's program and address spaces.
	* remote.c (remote_add_inferior): Set the new inferior's program
	and address spaces.
	(remote_start_remote): Update address spaces.
	(extended_remote_create_inferior_1): Don't init the thread list if
	we already debugging other inferiors.
	* darwin-nat.c (darwin_attach): Set the new inferior's program and
	address spaces.
	* gnu-nat.c (gnu_attach): Ditto.
	* go32-nat.c (go32_create_inferior): Ditto.
	* inf-ttrace.c (inf_ttrace_follow_fork, inf_ttrace_attach): Ditto.
	* monitor.c (monitor_open): Ditto.
	* nto-procfs.c (procfs_attach, procfs_create_inferior): Ditto.
	* procfs.c (do_attach): Ditto.
	* windows-nat.c (do_initial_windows_stuff): Ditto.

	* inflow.c (inferior_process_group)
	(terminal_init_inferior_with_pgrp, terminal_inferior,
	(terminal_ours_1, inflow_inferior_exit, copy_terminal_info)
	(child_terminal_info, new_tty_postfork, set_sigint_trap): Adjust
	to use per-inferior data instead of inferior->terminal_info.
	(inflow_inferior_data): New.
	(inflow_new_inferior): Delete.
	(inflow_inferior_data_cleanup): New.
	(get_inflow_inferior_data): New.

	* mi/mi-interp.c (mi_new_inferior): Rename to...
	(mi_inferior_appeared): ... this.
	(mi_interpreter_init): Adjust.

	* tui/tui-disasm.c: Include "progspace.h".
	(tui_set_disassem_content): Pass an address space to
	breakpoint_here_p.

	* NEWS: Mention multi-program debugging support.  Mention new
	commands "add-inferior", "clone-inferior", "remove-inferior",
	"maint info program-spaces", and new option "set
	follow-exec-mode".

2009-10-19  Pedro Alves	 <pedro@codesourcery.com>
	    Stan Shebs	<stan@codesourcery.com>

	gdb/doc/
	* observer.texi (new_inferior): Rename to...
	(inferior_appeared): ... this.

2009-10-19  Pedro Alves	 <pedro@codesourcery.com>
	    Stan Shebs	<stan@codesourcery.com>

	gdb/testsuite/
	* gdb.base/foll-vfork.exp: Adjust to spell out "follow-fork".
	* gdb.base/foll-exec.exp: Adjust to expect a process id before
	"Executing new program".
	* gdb.base/foll-fork.exp: Adjust to spell out "follow-fork".
	* gdb.base/multi-forks.exp: Ditto.  Adjust to the inferior being
	left listed after having been killed.
	* gdb.base/attach.exp: Adjust to spell out "symbol-file".
	* gdb.base/maint.exp: Adjust test.

	* Makefile.in (ALL_SUBDIRS): Add gdb.multi.
	* gdb.multi/Makefile.in: New.
	* gdb.multi/base.exp: New.
	* gdb.multi/goodbye.c: New.
	* gdb.multi/hangout.c: New.
	* gdb.multi/hello.c: New.
	* gdb.multi/bkpt-multi-exec.c: New.
	* gdb.multi/bkpt-multi-exec.exp: New.
	* gdb.multi/crashme.c: New.

2009-10-19  Pedro Alves	 <pedro@codesourcery.com>
	    Stan Shebs	<stan@codesourcery.com>

	gdb/doc/
	* gdb.texinfo (Inferiors): Rename node to ...
	(Inferiors and Programs): ... this.  Mention running multiple
	programs in the same debug session.
	<info inferiors>: Mention the new 'Executable' column if "info
	inferiors".  Update examples.  Document the "add-inferior",
	"clone-inferior", "remove-inferior" and "maint info
	program-spaces" commands.
	(Process): Rename node to...
	(Forks): ... this.  Document "set|show follow-exec-mode".
2009-10-19 09:51:43 +00:00

2351 lines
61 KiB
C

/* Remote debugging interface for boot monitors, for GDB.
Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
2000, 2001, 2002, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
Contributed by Cygnus Support. Written by Rob Savoye for Cygnus.
Resurrected from the ashes by Stu Grossman.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
/* This file was derived from various remote-* modules. It is a collection
of generic support functions so GDB can talk directly to a ROM based
monitor. This saves use from having to hack an exception based handler
into existence, and makes for quick porting.
This module talks to a debug monitor called 'MONITOR', which
We communicate with MONITOR via either a direct serial line, or a TCP
(or possibly TELNET) stream to a terminal multiplexor,
which in turn talks to the target board. */
/* FIXME 32x64: This code assumes that registers and addresses are at
most 32 bits long. If they can be larger, you will need to declare
values as LONGEST and use %llx or some such to print values when
building commands to send to the monitor. Since we don't know of
any actual 64-bit targets with ROM monitors that use this code,
it's not an issue right now. -sts 4/18/96 */
#include "defs.h"
#include "gdbcore.h"
#include "target.h"
#include "exceptions.h"
#include <signal.h>
#include <ctype.h>
#include "gdb_string.h"
#include <sys/types.h>
#include "command.h"
#include "serial.h"
#include "monitor.h"
#include "gdbcmd.h"
#include "inferior.h"
#include "gdb_regex.h"
#include "srec.h"
#include "regcache.h"
#include "gdbthread.h"
static char *dev_name;
static struct target_ops *targ_ops;
static void monitor_interrupt_query (void);
static void monitor_interrupt_twice (int);
static void monitor_stop (ptid_t);
static void monitor_dump_regs (struct regcache *regcache);
#if 0
static int from_hex (int a);
#endif
static struct monitor_ops *current_monitor;
static int hashmark; /* flag set by "set hash" */
static int timeout = 30;
static int in_monitor_wait = 0; /* Non-zero means we are in monitor_wait() */
static void (*ofunc) (); /* Old SIGINT signal handler */
static CORE_ADDR *breakaddr;
/* Descriptor for I/O to remote machine. Initialize it to NULL so
that monitor_open knows that we don't have a file open when the
program starts. */
static struct serial *monitor_desc = NULL;
/* Pointer to regexp pattern matching data */
static struct re_pattern_buffer register_pattern;
static char register_fastmap[256];
static struct re_pattern_buffer getmem_resp_delim_pattern;
static char getmem_resp_delim_fastmap[256];
static struct re_pattern_buffer setmem_resp_delim_pattern;
static char setmem_resp_delim_fastmap[256];
static struct re_pattern_buffer setreg_resp_delim_pattern;
static char setreg_resp_delim_fastmap[256];
static int dump_reg_flag; /* Non-zero means do a dump_registers cmd when
monitor_wait wakes up. */
static int first_time = 0; /* is this the first time we're executing after
gaving created the child proccess? */
/* This is the ptid we use while we're connected to a monitor. Its
value is arbitrary, as monitor targets don't have a notion of
processes or threads, but we need something non-null to place in
inferior_ptid. */
static ptid_t monitor_ptid;
#define TARGET_BUF_SIZE 2048
/* Monitor specific debugging information. Typically only useful to
the developer of a new monitor interface. */
static void monitor_debug (const char *fmt, ...) ATTR_FORMAT(printf, 1, 2);
static int monitor_debug_p = 0;
/* NOTE: This file alternates between monitor_debug_p and remote_debug
when determining if debug information is printed. Perhaps this
could be simplified. */
static void
monitor_debug (const char *fmt, ...)
{
if (monitor_debug_p)
{
va_list args;
va_start (args, fmt);
vfprintf_filtered (gdb_stdlog, fmt, args);
va_end (args);
}
}
/* Convert a string into a printable representation, Return # byte in
the new string. When LEN is >0 it specifies the size of the
string. Otherwize strlen(oldstr) is used. */
static void
monitor_printable_string (char *newstr, char *oldstr, int len)
{
int ch;
int i;
if (len <= 0)
len = strlen (oldstr);
for (i = 0; i < len; i++)
{
ch = oldstr[i];
switch (ch)
{
default:
if (isprint (ch))
*newstr++ = ch;
else
{
sprintf (newstr, "\\x%02x", ch & 0xff);
newstr += 4;
}
break;
case '\\':
*newstr++ = '\\';
*newstr++ = '\\';
break;
case '\b':
*newstr++ = '\\';
*newstr++ = 'b';
break;
case '\f':
*newstr++ = '\\';
*newstr++ = 't';
break;
case '\n':
*newstr++ = '\\';
*newstr++ = 'n';
break;
case '\r':
*newstr++ = '\\';
*newstr++ = 'r';
break;
case '\t':
*newstr++ = '\\';
*newstr++ = 't';
break;
case '\v':
*newstr++ = '\\';
*newstr++ = 'v';
break;
}
}
*newstr++ = '\0';
}
/* Print monitor errors with a string, converting the string to printable
representation. */
static void
monitor_error (char *function, char *message,
CORE_ADDR memaddr, int len, char *string, int final_char)
{
int real_len = (len == 0 && string != (char *) 0) ? strlen (string) : len;
char *safe_string = alloca ((real_len * 4) + 1);
monitor_printable_string (safe_string, string, real_len);
if (final_char)
error (_("%s (%s): %s: %s%c"),
function, paddress (target_gdbarch, memaddr),
message, safe_string, final_char);
else
error (_("%s (%s): %s: %s"),
function, paddress (target_gdbarch, memaddr),
message, safe_string);
}
/* Convert hex digit A to a number. */
static int
fromhex (int a)
{
if (a >= '0' && a <= '9')
return a - '0';
else if (a >= 'a' && a <= 'f')
return a - 'a' + 10;
else if (a >= 'A' && a <= 'F')
return a - 'A' + 10;
else
error (_("Invalid hex digit %d"), a);
}
/* monitor_vsprintf - similar to vsprintf but handles 64-bit addresses
This function exists to get around the problem that many host platforms
don't have a printf that can print 64-bit addresses. The %A format
specification is recognized as a special case, and causes the argument
to be printed as a 64-bit hexadecimal address.
Only format specifiers of the form "[0-9]*[a-z]" are recognized.
If it is a '%s' format, the argument is a string; otherwise the
argument is assumed to be a long integer.
%% is also turned into a single %.
*/
static void
monitor_vsprintf (char *sndbuf, char *pattern, va_list args)
{
int addr_bit = gdbarch_addr_bit (target_gdbarch);
char format[10];
char fmt;
char *p;
int i;
long arg_int;
CORE_ADDR arg_addr;
char *arg_string;
for (p = pattern; *p; p++)
{
if (*p == '%')
{
/* Copy the format specifier to a separate buffer. */
format[0] = *p++;
for (i = 1; *p >= '0' && *p <= '9' && i < (int) sizeof (format) - 2;
i++, p++)
format[i] = *p;
format[i] = fmt = *p;
format[i + 1] = '\0';
/* Fetch the next argument and print it. */
switch (fmt)
{
case '%':
strcpy (sndbuf, "%");
break;
case 'A':
arg_addr = va_arg (args, CORE_ADDR);
strcpy (sndbuf, phex_nz (arg_addr, addr_bit / 8));
break;
case 's':
arg_string = va_arg (args, char *);
sprintf (sndbuf, format, arg_string);
break;
default:
arg_int = va_arg (args, long);
sprintf (sndbuf, format, arg_int);
break;
}
sndbuf += strlen (sndbuf);
}
else
*sndbuf++ = *p;
}
*sndbuf = '\0';
}
/* monitor_printf_noecho -- Send data to monitor, but don't expect an echo.
Works just like printf. */
void
monitor_printf_noecho (char *pattern,...)
{
va_list args;
char sndbuf[2000];
int len;
va_start (args, pattern);
monitor_vsprintf (sndbuf, pattern, args);
len = strlen (sndbuf);
if (len + 1 > sizeof sndbuf)
internal_error (__FILE__, __LINE__, _("failed internal consistency check"));
if (monitor_debug_p)
{
char *safe_string = (char *) alloca ((strlen (sndbuf) * 4) + 1);
monitor_printable_string (safe_string, sndbuf, 0);
fprintf_unfiltered (gdb_stdlog, "sent[%s]\n", safe_string);
}
monitor_write (sndbuf, len);
}
/* monitor_printf -- Send data to monitor and check the echo. Works just like
printf. */
void
monitor_printf (char *pattern,...)
{
va_list args;
char sndbuf[2000];
int len;
va_start (args, pattern);
monitor_vsprintf (sndbuf, pattern, args);
len = strlen (sndbuf);
if (len + 1 > sizeof sndbuf)
internal_error (__FILE__, __LINE__, _("failed internal consistency check"));
if (monitor_debug_p)
{
char *safe_string = (char *) alloca ((len * 4) + 1);
monitor_printable_string (safe_string, sndbuf, 0);
fprintf_unfiltered (gdb_stdlog, "sent[%s]\n", safe_string);
}
monitor_write (sndbuf, len);
/* We used to expect that the next immediate output was the characters we
just output, but sometimes some extra junk appeared before the characters
we expected, like an extra prompt, or a portmaster sending telnet negotiations.
So, just start searching for what we sent, and skip anything unknown. */
monitor_debug ("ExpectEcho\n");
monitor_expect (sndbuf, (char *) 0, 0);
}
/* Write characters to the remote system. */
void
monitor_write (char *buf, int buflen)
{
if (serial_write (monitor_desc, buf, buflen))
fprintf_unfiltered (gdb_stderr, "serial_write failed: %s\n",
safe_strerror (errno));
}
/* Read a binary character from the remote system, doing all the fancy
timeout stuff, but without interpreting the character in any way,
and without printing remote debug information. */
int
monitor_readchar (void)
{
int c;
int looping;
do
{
looping = 0;
c = serial_readchar (monitor_desc, timeout);
if (c >= 0)
c &= 0xff; /* don't lose bit 7 */
}
while (looping);
if (c >= 0)
return c;
if (c == SERIAL_TIMEOUT)
error (_("Timeout reading from remote system."));
perror_with_name (_("remote-monitor"));
}
/* Read a character from the remote system, doing all the fancy
timeout stuff. */
static int
readchar (int timeout)
{
int c;
static enum
{
last_random, last_nl, last_cr, last_crnl
}
state = last_random;
int looping;
do
{
looping = 0;
c = serial_readchar (monitor_desc, timeout);
if (c >= 0)
{
c &= 0x7f;
/* This seems to interfere with proper function of the
input stream */
if (monitor_debug_p || remote_debug)
{
char buf[2];
buf[0] = c;
buf[1] = '\0';
puts_debug ("read -->", buf, "<--");
}
}
/* Canonicialize \n\r combinations into one \r */
if ((current_monitor->flags & MO_HANDLE_NL) != 0)
{
if ((c == '\r' && state == last_nl)
|| (c == '\n' && state == last_cr))
{
state = last_crnl;
looping = 1;
}
else if (c == '\r')
state = last_cr;
else if (c != '\n')
state = last_random;
else
{
state = last_nl;
c = '\r';
}
}
}
while (looping);
if (c >= 0)
return c;
if (c == SERIAL_TIMEOUT)
#if 0
/* I fail to see how detaching here can be useful */
if (in_monitor_wait) /* Watchdog went off */
{
target_mourn_inferior ();
error (_("GDB serial timeout has expired. Target detached."));
}
else
#endif
error (_("Timeout reading from remote system."));
perror_with_name (_("remote-monitor"));
}
/* Scan input from the remote system, until STRING is found. If BUF is non-
zero, then collect input until we have collected either STRING or BUFLEN-1
chars. In either case we terminate BUF with a 0. If input overflows BUF
because STRING can't be found, return -1, else return number of chars in BUF
(minus the terminating NUL). Note that in the non-overflow case, STRING
will be at the end of BUF. */
int
monitor_expect (char *string, char *buf, int buflen)
{
char *p = string;
int obuflen = buflen;
int c;
if (monitor_debug_p)
{
char *safe_string = (char *) alloca ((strlen (string) * 4) + 1);
monitor_printable_string (safe_string, string, 0);
fprintf_unfiltered (gdb_stdlog, "MON Expecting '%s'\n", safe_string);
}
immediate_quit++;
while (1)
{
if (buf)
{
if (buflen < 2)
{
*buf = '\000';
immediate_quit--;
return -1;
}
c = readchar (timeout);
if (c == '\000')
continue;
*buf++ = c;
buflen--;
}
else
c = readchar (timeout);
/* Don't expect any ^C sent to be echoed */
if (*p == '\003' || c == *p)
{
p++;
if (*p == '\0')
{
immediate_quit--;
if (buf)
{
*buf++ = '\000';
return obuflen - buflen;
}
else
return 0;
}
}
else
{
/* We got a character that doesn't match the string. We need to
back up p, but how far? If we're looking for "..howdy" and the
monitor sends "...howdy"? There's certainly a match in there,
but when we receive the third ".", we won't find it if we just
restart the matching at the beginning of the string.
This is a Boyer-Moore kind of situation. We want to reset P to
the end of the longest prefix of STRING that is a suffix of
what we've read so far. In the example above, that would be
".." --- the longest prefix of "..howdy" that is a suffix of
"...". This longest prefix could be the empty string, if C
is nowhere to be found in STRING.
If this longest prefix is not the empty string, it must contain
C, so let's search from the end of STRING for instances of C,
and see if the portion of STRING before that is a suffix of
what we read before C. Actually, we can search backwards from
p, since we know no prefix can be longer than that.
Note that we can use STRING itself, along with C, as a record
of what we've received so far. :) */
int i;
for (i = (p - string) - 1; i >= 0; i--)
if (string[i] == c)
{
/* Is this prefix a suffix of what we've read so far?
In other words, does
string[0 .. i-1] == string[p - i, p - 1]? */
if (! memcmp (string, p - i, i))
{
p = string + i + 1;
break;
}
}
if (i < 0)
p = string;
}
}
}
/* Search for a regexp. */
static int
monitor_expect_regexp (struct re_pattern_buffer *pat, char *buf, int buflen)
{
char *mybuf;
char *p;
monitor_debug ("MON Expecting regexp\n");
if (buf)
mybuf = buf;
else
{
mybuf = alloca (TARGET_BUF_SIZE);
buflen = TARGET_BUF_SIZE;
}
p = mybuf;
while (1)
{
int retval;
if (p - mybuf >= buflen)
{ /* Buffer about to overflow */
/* On overflow, we copy the upper half of the buffer to the lower half. Not
great, but it usually works... */
memcpy (mybuf, mybuf + buflen / 2, buflen / 2);
p = mybuf + buflen / 2;
}
*p++ = readchar (timeout);
retval = re_search (pat, mybuf, p - mybuf, 0, p - mybuf, NULL);
if (retval >= 0)
return 1;
}
}
/* Keep discarding input until we see the MONITOR prompt.
The convention for dealing with the prompt is that you
o give your command
o *then* wait for the prompt.
Thus the last thing that a procedure does with the serial line will
be an monitor_expect_prompt(). Exception: monitor_resume does not
wait for the prompt, because the terminal is being handed over to
the inferior. However, the next thing which happens after that is
a monitor_wait which does wait for the prompt. Note that this
includes abnormal exit, e.g. error(). This is necessary to prevent
getting into states from which we can't recover. */
int
monitor_expect_prompt (char *buf, int buflen)
{
monitor_debug ("MON Expecting prompt\n");
return monitor_expect (current_monitor->prompt, buf, buflen);
}
/* Get N 32-bit words from remote, each preceded by a space, and put
them in registers starting at REGNO. */
#if 0
static unsigned long
get_hex_word (void)
{
unsigned long val;
int i;
int ch;
do
ch = readchar (timeout);
while (isspace (ch));
val = from_hex (ch);
for (i = 7; i >= 1; i--)
{
ch = readchar (timeout);
if (!isxdigit (ch))
break;
val = (val << 4) | from_hex (ch);
}
return val;
}
#endif
static void
compile_pattern (char *pattern, struct re_pattern_buffer *compiled_pattern,
char *fastmap)
{
int tmp;
const char *val;
compiled_pattern->fastmap = fastmap;
tmp = re_set_syntax (RE_SYNTAX_EMACS);
val = re_compile_pattern (pattern,
strlen (pattern),
compiled_pattern);
re_set_syntax (tmp);
if (val)
error (_("compile_pattern: Can't compile pattern string `%s': %s!"), pattern, val);
if (fastmap)
re_compile_fastmap (compiled_pattern);
}
/* Open a connection to a remote debugger. NAME is the filename used
for communication. */
void
monitor_open (char *args, struct monitor_ops *mon_ops, int from_tty)
{
char *name;
char **p;
struct inferior *inf;
if (mon_ops->magic != MONITOR_OPS_MAGIC)
error (_("Magic number of monitor_ops struct wrong."));
targ_ops = mon_ops->target;
name = targ_ops->to_shortname;
if (!args)
error (_("Use `target %s DEVICE-NAME' to use a serial port, or \n\
`target %s HOST-NAME:PORT-NUMBER' to use a network connection."), name, name);
target_preopen (from_tty);
/* Setup pattern for register dump */
if (mon_ops->register_pattern)
compile_pattern (mon_ops->register_pattern, &register_pattern,
register_fastmap);
if (mon_ops->getmem.resp_delim)
compile_pattern (mon_ops->getmem.resp_delim, &getmem_resp_delim_pattern,
getmem_resp_delim_fastmap);
if (mon_ops->setmem.resp_delim)
compile_pattern (mon_ops->setmem.resp_delim, &setmem_resp_delim_pattern,
setmem_resp_delim_fastmap);
if (mon_ops->setreg.resp_delim)
compile_pattern (mon_ops->setreg.resp_delim, &setreg_resp_delim_pattern,
setreg_resp_delim_fastmap);
unpush_target (targ_ops);
if (dev_name)
xfree (dev_name);
dev_name = xstrdup (args);
monitor_desc = serial_open (dev_name);
if (!monitor_desc)
perror_with_name (dev_name);
if (baud_rate != -1)
{
if (serial_setbaudrate (monitor_desc, baud_rate))
{
serial_close (monitor_desc);
perror_with_name (dev_name);
}
}
serial_raw (monitor_desc);
serial_flush_input (monitor_desc);
/* some systems only work with 2 stop bits */
serial_setstopbits (monitor_desc, mon_ops->stopbits);
current_monitor = mon_ops;
/* See if we can wake up the monitor. First, try sending a stop sequence,
then send the init strings. Last, remove all breakpoints. */
if (current_monitor->stop)
{
monitor_stop (inferior_ptid);
if ((current_monitor->flags & MO_NO_ECHO_ON_OPEN) == 0)
{
monitor_debug ("EXP Open echo\n");
monitor_expect_prompt (NULL, 0);
}
}
/* wake up the monitor and see if it's alive */
for (p = mon_ops->init; *p != NULL; p++)
{
/* Some of the characters we send may not be echoed,
but we hope to get a prompt at the end of it all. */
if ((current_monitor->flags & MO_NO_ECHO_ON_OPEN) == 0)
monitor_printf (*p);
else
monitor_printf_noecho (*p);
monitor_expect_prompt (NULL, 0);
}
serial_flush_input (monitor_desc);
/* Alloc breakpoints */
if (mon_ops->set_break != NULL)
{
if (mon_ops->num_breakpoints == 0)
mon_ops->num_breakpoints = 8;
breakaddr = (CORE_ADDR *) xmalloc (mon_ops->num_breakpoints * sizeof (CORE_ADDR));
memset (breakaddr, 0, mon_ops->num_breakpoints * sizeof (CORE_ADDR));
}
/* Remove all breakpoints */
if (mon_ops->clr_all_break)
{
monitor_printf (mon_ops->clr_all_break);
monitor_expect_prompt (NULL, 0);
}
if (from_tty)
printf_unfiltered (_("Remote target %s connected to %s\n"), name, dev_name);
push_target (targ_ops);
/* Start afresh. */
init_thread_list ();
/* Make run command think we are busy... */
inferior_ptid = monitor_ptid;
inf = current_inferior ();
inferior_appeared (inf, ptid_get_pid (inferior_ptid));
add_thread_silent (inferior_ptid);
/* Give monitor_wait something to read */
monitor_printf (current_monitor->line_term);
start_remote (from_tty);
}
/* Close out all files and local state before this target loses
control. */
void
monitor_close (int quitting)
{
if (monitor_desc)
serial_close (monitor_desc);
/* Free breakpoint memory */
if (breakaddr != NULL)
{
xfree (breakaddr);
breakaddr = NULL;
}
monitor_desc = NULL;
delete_thread_silent (monitor_ptid);
delete_inferior_silent (ptid_get_pid (monitor_ptid));
}
/* Terminate the open connection to the remote debugger. Use this
when you want to detach and do something else with your gdb. */
static void
monitor_detach (struct target_ops *ops, char *args, int from_tty)
{
pop_target (); /* calls monitor_close to do the real work */
if (from_tty)
printf_unfiltered (_("Ending remote %s debugging\n"), target_shortname);
}
/* Convert VALSTR into the target byte-ordered value of REGNO and store it. */
char *
monitor_supply_register (struct regcache *regcache, int regno, char *valstr)
{
struct gdbarch *gdbarch = get_regcache_arch (regcache);
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
ULONGEST val;
unsigned char regbuf[MAX_REGISTER_SIZE];
char *p;
val = 0;
p = valstr;
while (p && *p != '\0')
{
if (*p == '\r' || *p == '\n')
{
while (*p != '\0')
p++;
break;
}
if (isspace (*p))
{
p++;
continue;
}
if (!isxdigit (*p) && *p != 'x')
{
break;
}
val <<= 4;
val += fromhex (*p++);
}
monitor_debug ("Supplying Register %d %s\n", regno, valstr);
if (val == 0 && valstr == p)
error (_("monitor_supply_register (%d): bad value from monitor: %s."),
regno, valstr);
/* supply register stores in target byte order, so swap here */
store_unsigned_integer (regbuf, register_size (gdbarch, regno), byte_order,
val);
regcache_raw_supply (regcache, regno, regbuf);
return p;
}
/* Tell the remote machine to resume. */
static void
monitor_resume (struct target_ops *ops,
ptid_t ptid, int step, enum target_signal sig)
{
/* Some monitors require a different command when starting a program */
monitor_debug ("MON resume\n");
if (current_monitor->flags & MO_RUN_FIRST_TIME && first_time == 1)
{
first_time = 0;
monitor_printf ("run\r");
if (current_monitor->flags & MO_NEED_REGDUMP_AFTER_CONT)
dump_reg_flag = 1;
return;
}
if (step)
monitor_printf (current_monitor->step);
else
{
if (current_monitor->continue_hook)
(*current_monitor->continue_hook) ();
else
monitor_printf (current_monitor->cont);
if (current_monitor->flags & MO_NEED_REGDUMP_AFTER_CONT)
dump_reg_flag = 1;
}
}
/* Parse the output of a register dump command. A monitor specific
regexp is used to extract individual register descriptions of the
form REG=VAL. Each description is split up into a name and a value
string which are passed down to monitor specific code. */
static void
parse_register_dump (struct regcache *regcache, char *buf, int len)
{
monitor_debug ("MON Parsing register dump\n");
while (1)
{
int regnamelen, vallen;
char *regname, *val;
/* Element 0 points to start of register name, and element 1
points to the start of the register value. */
struct re_registers register_strings;
memset (&register_strings, 0, sizeof (struct re_registers));
if (re_search (&register_pattern, buf, len, 0, len,
&register_strings) == -1)
break;
regnamelen = register_strings.end[1] - register_strings.start[1];
regname = buf + register_strings.start[1];
vallen = register_strings.end[2] - register_strings.start[2];
val = buf + register_strings.start[2];
current_monitor->supply_register (regcache, regname, regnamelen,
val, vallen);
buf += register_strings.end[0];
len -= register_strings.end[0];
}
}
/* Send ^C to target to halt it. Target will respond, and send us a
packet. */
static void
monitor_interrupt (int signo)
{
/* If this doesn't work, try more severe steps. */
signal (signo, monitor_interrupt_twice);
if (monitor_debug_p || remote_debug)
fprintf_unfiltered (gdb_stdlog, "monitor_interrupt called\n");
target_stop (inferior_ptid);
}
/* The user typed ^C twice. */
static void
monitor_interrupt_twice (int signo)
{
signal (signo, ofunc);
monitor_interrupt_query ();
signal (signo, monitor_interrupt);
}
/* Ask the user what to do when an interrupt is received. */
static void
monitor_interrupt_query (void)
{
target_terminal_ours ();
if (query (_("Interrupted while waiting for the program.\n\
Give up (and stop debugging it)? ")))
{
target_mourn_inferior ();
deprecated_throw_reason (RETURN_QUIT);
}
target_terminal_inferior ();
}
static void
monitor_wait_cleanup (void *old_timeout)
{
timeout = *(int *) old_timeout;
signal (SIGINT, ofunc);
in_monitor_wait = 0;
}
static void
monitor_wait_filter (char *buf,
int bufmax,
int *ext_resp_len,
struct target_waitstatus *status)
{
int resp_len;
do
{
resp_len = monitor_expect_prompt (buf, bufmax);
*ext_resp_len = resp_len;
if (resp_len <= 0)
fprintf_unfiltered (gdb_stderr, "monitor_wait: excessive response from monitor: %s.", buf);
}
while (resp_len < 0);
/* Print any output characters that were preceded by ^O. */
/* FIXME - This would be great as a user settabgle flag */
if (monitor_debug_p || remote_debug
|| current_monitor->flags & MO_PRINT_PROGRAM_OUTPUT)
{
int i;
for (i = 0; i < resp_len - 1; i++)
if (buf[i] == 0x0f)
putchar_unfiltered (buf[++i]);
}
}
/* Wait until the remote machine stops, then return, storing status in
status just as `wait' would. */
static ptid_t
monitor_wait (struct target_ops *ops,
ptid_t ptid, struct target_waitstatus *status, int options)
{
int old_timeout = timeout;
char buf[TARGET_BUF_SIZE];
int resp_len;
struct cleanup *old_chain;
status->kind = TARGET_WAITKIND_EXITED;
status->value.integer = 0;
old_chain = make_cleanup (monitor_wait_cleanup, &old_timeout);
monitor_debug ("MON wait\n");
#if 0
/* This is somthing other than a maintenance command */
in_monitor_wait = 1;
timeout = watchdog > 0 ? watchdog : -1;
#else
timeout = -1; /* Don't time out -- user program is running. */
#endif
ofunc = (void (*)()) signal (SIGINT, monitor_interrupt);
if (current_monitor->wait_filter)
(*current_monitor->wait_filter) (buf, sizeof (buf), &resp_len, status);
else
monitor_wait_filter (buf, sizeof (buf), &resp_len, status);
#if 0 /* Transferred to monitor wait filter */
do
{
resp_len = monitor_expect_prompt (buf, sizeof (buf));
if (resp_len <= 0)
fprintf_unfiltered (gdb_stderr, "monitor_wait: excessive response from monitor: %s.", buf);
}
while (resp_len < 0);
/* Print any output characters that were preceded by ^O. */
/* FIXME - This would be great as a user settabgle flag */
if (monitor_debug_p || remote_debug
|| current_monitor->flags & MO_PRINT_PROGRAM_OUTPUT)
{
int i;
for (i = 0; i < resp_len - 1; i++)
if (buf[i] == 0x0f)
putchar_unfiltered (buf[++i]);
}
#endif
signal (SIGINT, ofunc);
timeout = old_timeout;
#if 0
if (dump_reg_flag && current_monitor->dump_registers)
{
dump_reg_flag = 0;
monitor_printf (current_monitor->dump_registers);
resp_len = monitor_expect_prompt (buf, sizeof (buf));
}
if (current_monitor->register_pattern)
parse_register_dump (get_current_regcache (), buf, resp_len);
#else
monitor_debug ("Wait fetching registers after stop\n");
monitor_dump_regs (get_current_regcache ());
#endif
status->kind = TARGET_WAITKIND_STOPPED;
status->value.sig = TARGET_SIGNAL_TRAP;
discard_cleanups (old_chain);
in_monitor_wait = 0;
return inferior_ptid;
}
/* Fetch register REGNO, or all registers if REGNO is -1. Returns
errno value. */
static void
monitor_fetch_register (struct regcache *regcache, int regno)
{
const char *name;
char *zerobuf;
char *regbuf;
int i;
regbuf = alloca (MAX_REGISTER_SIZE * 2 + 1);
zerobuf = alloca (MAX_REGISTER_SIZE);
memset (zerobuf, 0, MAX_REGISTER_SIZE);
if (current_monitor->regname != NULL)
name = current_monitor->regname (regno);
else
name = current_monitor->regnames[regno];
monitor_debug ("MON fetchreg %d '%s'\n", regno, name ? name : "(null name)");
if (!name || (*name == '\0'))
{
monitor_debug ("No register known for %d\n", regno);
regcache_raw_supply (regcache, regno, zerobuf);
return;
}
/* send the register examine command */
monitor_printf (current_monitor->getreg.cmd, name);
/* If RESP_DELIM is specified, we search for that as a leading
delimiter for the register value. Otherwise, we just start
searching from the start of the buf. */
if (current_monitor->getreg.resp_delim)
{
monitor_debug ("EXP getreg.resp_delim\n");
monitor_expect (current_monitor->getreg.resp_delim, NULL, 0);
/* Handle case of first 32 registers listed in pairs. */
if (current_monitor->flags & MO_32_REGS_PAIRED
&& (regno & 1) != 0 && regno < 32)
{
monitor_debug ("EXP getreg.resp_delim\n");
monitor_expect (current_monitor->getreg.resp_delim, NULL, 0);
}
}
/* Skip leading spaces and "0x" if MO_HEX_PREFIX flag is set */
if (current_monitor->flags & MO_HEX_PREFIX)
{
int c;
c = readchar (timeout);
while (c == ' ')
c = readchar (timeout);
if ((c == '0') && ((c = readchar (timeout)) == 'x'))
;
else
error (_("Bad value returned from monitor while fetching register %x."),
regno);
}
/* Read upto the maximum number of hex digits for this register, skipping
spaces, but stop reading if something else is seen. Some monitors
like to drop leading zeros. */
for (i = 0; i < register_size (get_regcache_arch (regcache), regno) * 2; i++)
{
int c;
c = readchar (timeout);
while (c == ' ')
c = readchar (timeout);
if (!isxdigit (c))
break;
regbuf[i] = c;
}
regbuf[i] = '\000'; /* terminate the number */
monitor_debug ("REGVAL '%s'\n", regbuf);
/* If TERM is present, we wait for that to show up. Also, (if TERM
is present), we will send TERM_CMD if that is present. In any
case, we collect all of the output into buf, and then wait for
the normal prompt. */
if (current_monitor->getreg.term)
{
monitor_debug ("EXP getreg.term\n");
monitor_expect (current_monitor->getreg.term, NULL, 0); /* get response */
}
if (current_monitor->getreg.term_cmd)
{
monitor_debug ("EMIT getreg.term.cmd\n");
monitor_printf (current_monitor->getreg.term_cmd);
}
if (!current_monitor->getreg.term || /* Already expected or */
current_monitor->getreg.term_cmd) /* ack expected */
monitor_expect_prompt (NULL, 0); /* get response */
monitor_supply_register (regcache, regno, regbuf);
}
/* Sometimes, it takes several commands to dump the registers */
/* This is a primitive for use by variations of monitor interfaces in
case they need to compose the operation.
*/
int
monitor_dump_reg_block (struct regcache *regcache, char *block_cmd)
{
char buf[TARGET_BUF_SIZE];
int resp_len;
monitor_printf (block_cmd);
resp_len = monitor_expect_prompt (buf, sizeof (buf));
parse_register_dump (regcache, buf, resp_len);
return 1;
}
/* Read the remote registers into the block regs. */
/* Call the specific function if it has been provided */
static void
monitor_dump_regs (struct regcache *regcache)
{
char buf[TARGET_BUF_SIZE];
int resp_len;
if (current_monitor->dumpregs)
(*(current_monitor->dumpregs)) (regcache); /* call supplied function */
else if (current_monitor->dump_registers) /* default version */
{
monitor_printf (current_monitor->dump_registers);
resp_len = monitor_expect_prompt (buf, sizeof (buf));
parse_register_dump (regcache, buf, resp_len);
}
else
internal_error (__FILE__, __LINE__, _("failed internal consistency check")); /* Need some way to read registers */
}
static void
monitor_fetch_registers (struct target_ops *ops,
struct regcache *regcache, int regno)
{
monitor_debug ("MON fetchregs\n");
if (current_monitor->getreg.cmd)
{
if (regno >= 0)
{
monitor_fetch_register (regcache, regno);
return;
}
for (regno = 0; regno < gdbarch_num_regs (get_regcache_arch (regcache));
regno++)
monitor_fetch_register (regcache, regno);
}
else
{
monitor_dump_regs (regcache);
}
}
/* Store register REGNO, or all if REGNO == 0. Return errno value. */
static void
monitor_store_register (struct regcache *regcache, int regno)
{
int reg_size = register_size (get_regcache_arch (regcache), regno);
const char *name;
ULONGEST val;
if (current_monitor->regname != NULL)
name = current_monitor->regname (regno);
else
name = current_monitor->regnames[regno];
if (!name || (*name == '\0'))
{
monitor_debug ("MON Cannot store unknown register\n");
return;
}
regcache_cooked_read_unsigned (regcache, regno, &val);
monitor_debug ("MON storeg %d %s\n", regno, phex (val, reg_size));
/* send the register deposit command */
if (current_monitor->flags & MO_REGISTER_VALUE_FIRST)
monitor_printf (current_monitor->setreg.cmd, val, name);
else if (current_monitor->flags & MO_SETREG_INTERACTIVE)
monitor_printf (current_monitor->setreg.cmd, name);
else
monitor_printf (current_monitor->setreg.cmd, name, val);
if (current_monitor->setreg.resp_delim)
{
monitor_debug ("EXP setreg.resp_delim\n");
monitor_expect_regexp (&setreg_resp_delim_pattern, NULL, 0);
if (current_monitor->flags & MO_SETREG_INTERACTIVE)
monitor_printf ("%s\r", phex_nz (val, reg_size));
}
if (current_monitor->setreg.term)
{
monitor_debug ("EXP setreg.term\n");
monitor_expect (current_monitor->setreg.term, NULL, 0);
if (current_monitor->flags & MO_SETREG_INTERACTIVE)
monitor_printf ("%s\r", phex_nz (val, reg_size));
monitor_expect_prompt (NULL, 0);
}
else
monitor_expect_prompt (NULL, 0);
if (current_monitor->setreg.term_cmd) /* Mode exit required */
{
monitor_debug ("EXP setreg_termcmd\n");
monitor_printf ("%s", current_monitor->setreg.term_cmd);
monitor_expect_prompt (NULL, 0);
}
} /* monitor_store_register */
/* Store the remote registers. */
static void
monitor_store_registers (struct target_ops *ops,
struct regcache *regcache, int regno)
{
if (regno >= 0)
{
monitor_store_register (regcache, regno);
return;
}
for (regno = 0; regno < gdbarch_num_regs (get_regcache_arch (regcache));
regno++)
monitor_store_register (regcache, regno);
}
/* Get ready to modify the registers array. On machines which store
individual registers, this doesn't need to do anything. On machines
which store all the registers in one fell swoop, this makes sure
that registers contains all the registers from the program being
debugged. */
static void
monitor_prepare_to_store (struct regcache *regcache)
{
/* Do nothing, since we can store individual regs */
}
static void
monitor_files_info (struct target_ops *ops)
{
printf_unfiltered (_("\tAttached to %s at %d baud.\n"), dev_name, baud_rate);
}
static int
monitor_write_memory (CORE_ADDR memaddr, char *myaddr, int len)
{
enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch);
unsigned int val, hostval;
char *cmd;
int i;
monitor_debug ("MON write %d %s\n", len, paddress (target_gdbarch, memaddr));
if (current_monitor->flags & MO_ADDR_BITS_REMOVE)
memaddr = gdbarch_addr_bits_remove (target_gdbarch, memaddr);
/* Use memory fill command for leading 0 bytes. */
if (current_monitor->fill)
{
for (i = 0; i < len; i++)
if (myaddr[i] != 0)
break;
if (i > 4) /* More than 4 zeros is worth doing */
{
monitor_debug ("MON FILL %d\n", i);
if (current_monitor->flags & MO_FILL_USES_ADDR)
monitor_printf (current_monitor->fill, memaddr, (memaddr + i) - 1, 0);
else
monitor_printf (current_monitor->fill, memaddr, i, 0);
monitor_expect_prompt (NULL, 0);
return i;
}
}
#if 0
/* Can't actually use long longs if VAL is an int (nice idea, though). */
if ((memaddr & 0x7) == 0 && len >= 8 && current_monitor->setmem.cmdll)
{
len = 8;
cmd = current_monitor->setmem.cmdll;
}
else
#endif
if ((memaddr & 0x3) == 0 && len >= 4 && current_monitor->setmem.cmdl)
{
len = 4;
cmd = current_monitor->setmem.cmdl;
}
else if ((memaddr & 0x1) == 0 && len >= 2 && current_monitor->setmem.cmdw)
{
len = 2;
cmd = current_monitor->setmem.cmdw;
}
else
{
len = 1;
cmd = current_monitor->setmem.cmdb;
}
val = extract_unsigned_integer (myaddr, len, byte_order);
if (len == 4)
{
hostval = *(unsigned int *) myaddr;
monitor_debug ("Hostval(%08x) val(%08x)\n", hostval, val);
}
if (current_monitor->flags & MO_NO_ECHO_ON_SETMEM)
monitor_printf_noecho (cmd, memaddr, val);
else if (current_monitor->flags & MO_SETMEM_INTERACTIVE)
{
monitor_printf_noecho (cmd, memaddr);
if (current_monitor->setmem.resp_delim)
{
monitor_debug ("EXP setmem.resp_delim");
monitor_expect_regexp (&setmem_resp_delim_pattern, NULL, 0);
monitor_printf ("%x\r", val);
}
if (current_monitor->setmem.term)
{
monitor_debug ("EXP setmem.term");
monitor_expect (current_monitor->setmem.term, NULL, 0);
monitor_printf ("%x\r", val);
}
if (current_monitor->setmem.term_cmd)
{ /* Emit this to get out of the memory editing state */
monitor_printf ("%s", current_monitor->setmem.term_cmd);
/* Drop through to expecting a prompt */
}
}
else
monitor_printf (cmd, memaddr, val);
monitor_expect_prompt (NULL, 0);
return len;
}
static int
monitor_write_memory_bytes (CORE_ADDR memaddr, char *myaddr, int len)
{
unsigned char val;
int written = 0;
if (len == 0)
return 0;
/* Enter the sub mode */
monitor_printf (current_monitor->setmem.cmdb, memaddr);
monitor_expect_prompt (NULL, 0);
while (len)
{
val = *myaddr;
monitor_printf ("%x\r", val);
myaddr++;
memaddr++;
written++;
/* If we wanted to, here we could validate the address */
monitor_expect_prompt (NULL, 0);
len--;
}
/* Now exit the sub mode */
monitor_printf (current_monitor->getreg.term_cmd);
monitor_expect_prompt (NULL, 0);
return written;
}
static void
longlongendswap (unsigned char *a)
{
int i, j;
unsigned char x;
i = 0;
j = 7;
while (i < 4)
{
x = *(a + i);
*(a + i) = *(a + j);
*(a + j) = x;
i++, j--;
}
}
/* Format 32 chars of long long value, advance the pointer */
static char *hexlate = "0123456789abcdef";
static char *
longlong_hexchars (unsigned long long value,
char *outbuff)
{
if (value == 0)
{
*outbuff++ = '0';
return outbuff;
}
else
{
static unsigned char disbuf[8]; /* disassembly buffer */
unsigned char *scan, *limit; /* loop controls */
unsigned char c, nib;
int leadzero = 1;
scan = disbuf;
limit = scan + 8;
{
unsigned long long *dp;
dp = (unsigned long long *) scan;
*dp = value;
}
longlongendswap (disbuf); /* FIXME: ONly on big endian hosts */
while (scan < limit)
{
c = *scan++; /* a byte of our long long value */
if (leadzero)
{
if (c == 0)
continue;
else
leadzero = 0; /* henceforth we print even zeroes */
}
nib = c >> 4; /* high nibble bits */
*outbuff++ = hexlate[nib];
nib = c & 0x0f; /* low nibble bits */
*outbuff++ = hexlate[nib];
}
return outbuff;
}
} /* longlong_hexchars */
/* I am only going to call this when writing virtual byte streams.
Which possably entails endian conversions
*/
static int
monitor_write_memory_longlongs (CORE_ADDR memaddr, char *myaddr, int len)
{
static char hexstage[20]; /* At least 16 digits required, plus null */
char *endstring;
long long *llptr;
long long value;
int written = 0;
llptr = (unsigned long long *) myaddr;
if (len == 0)
return 0;
monitor_printf (current_monitor->setmem.cmdll, memaddr);
monitor_expect_prompt (NULL, 0);
while (len >= 8)
{
value = *llptr;
endstring = longlong_hexchars (*llptr, hexstage);
*endstring = '\0'; /* NUll terminate for printf */
monitor_printf ("%s\r", hexstage);
llptr++;
memaddr += 8;
written += 8;
/* If we wanted to, here we could validate the address */
monitor_expect_prompt (NULL, 0);
len -= 8;
}
/* Now exit the sub mode */
monitor_printf (current_monitor->getreg.term_cmd);
monitor_expect_prompt (NULL, 0);
return written;
} /* */
/* ----- MONITOR_WRITE_MEMORY_BLOCK ---------------------------- */
/* This is for the large blocks of memory which may occur in downloading.
And for monitors which use interactive entry,
And for monitors which do not have other downloading methods.
Without this, we will end up calling monitor_write_memory many times
and do the entry and exit of the sub mode many times
This currently assumes...
MO_SETMEM_INTERACTIVE
! MO_NO_ECHO_ON_SETMEM
To use this, the you have to patch the monitor_cmds block with
this function. Otherwise, its not tuned up for use by all
monitor variations.
*/
static int
monitor_write_memory_block (CORE_ADDR memaddr, char *myaddr, int len)
{
int written;
written = 0;
/* FIXME: This would be a good place to put the zero test */
#if 1
if ((len > 8) && (((len & 0x07)) == 0) && current_monitor->setmem.cmdll)
{
return monitor_write_memory_longlongs (memaddr, myaddr, len);
}
#endif
written = monitor_write_memory_bytes (memaddr, myaddr, len);
return written;
}
/* This is an alternate form of monitor_read_memory which is used for monitors
which can only read a single byte/word/etc. at a time. */
static int
monitor_read_memory_single (CORE_ADDR memaddr, char *myaddr, int len)
{
enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch);
unsigned int val;
char membuf[sizeof (int) * 2 + 1];
char *p;
char *cmd;
monitor_debug ("MON read single\n");
#if 0
/* Can't actually use long longs (nice idea, though). In fact, the
call to strtoul below will fail if it tries to convert a value
that's too big to fit in a long. */
if ((memaddr & 0x7) == 0 && len >= 8 && current_monitor->getmem.cmdll)
{
len = 8;
cmd = current_monitor->getmem.cmdll;
}
else
#endif
if ((memaddr & 0x3) == 0 && len >= 4 && current_monitor->getmem.cmdl)
{
len = 4;
cmd = current_monitor->getmem.cmdl;
}
else if ((memaddr & 0x1) == 0 && len >= 2 && current_monitor->getmem.cmdw)
{
len = 2;
cmd = current_monitor->getmem.cmdw;
}
else
{
len = 1;
cmd = current_monitor->getmem.cmdb;
}
/* Send the examine command. */
monitor_printf (cmd, memaddr);
/* If RESP_DELIM is specified, we search for that as a leading
delimiter for the memory value. Otherwise, we just start
searching from the start of the buf. */
if (current_monitor->getmem.resp_delim)
{
monitor_debug ("EXP getmem.resp_delim\n");
monitor_expect_regexp (&getmem_resp_delim_pattern, NULL, 0);
}
/* Now, read the appropriate number of hex digits for this loc,
skipping spaces. */
/* Skip leading spaces and "0x" if MO_HEX_PREFIX flag is set. */
if (current_monitor->flags & MO_HEX_PREFIX)
{
int c;
c = readchar (timeout);
while (c == ' ')
c = readchar (timeout);
if ((c == '0') && ((c = readchar (timeout)) == 'x'))
;
else
monitor_error ("monitor_read_memory_single",
"bad response from monitor",
memaddr, 0, NULL, 0);
}
{
int i;
for (i = 0; i < len * 2; i++)
{
int c;
while (1)
{
c = readchar (timeout);
if (isxdigit (c))
break;
if (c == ' ')
continue;
monitor_error ("monitor_read_memory_single",
"bad response from monitor",
memaddr, i, membuf, 0);
}
membuf[i] = c;
}
membuf[i] = '\000'; /* terminate the number */
}
/* If TERM is present, we wait for that to show up. Also, (if TERM is
present), we will send TERM_CMD if that is present. In any case, we collect
all of the output into buf, and then wait for the normal prompt. */
if (current_monitor->getmem.term)
{
monitor_expect (current_monitor->getmem.term, NULL, 0); /* get response */
if (current_monitor->getmem.term_cmd)
{
monitor_printf (current_monitor->getmem.term_cmd);
monitor_expect_prompt (NULL, 0);
}
}
else
monitor_expect_prompt (NULL, 0); /* get response */
p = membuf;
val = strtoul (membuf, &p, 16);
if (val == 0 && membuf == p)
monitor_error ("monitor_read_memory_single",
"bad value from monitor",
memaddr, 0, membuf, 0);
/* supply register stores in target byte order, so swap here */
store_unsigned_integer (myaddr, len, byte_order, val);
return len;
}
/* Copy LEN bytes of data from debugger memory at MYADDR to inferior's
memory at MEMADDR. Returns length moved. Currently, we do no more
than 16 bytes at a time. */
static int
monitor_read_memory (CORE_ADDR memaddr, char *myaddr, int len)
{
unsigned int val;
char buf[512];
char *p, *p1;
int resp_len;
int i;
CORE_ADDR dumpaddr;
if (len <= 0)
{
monitor_debug ("Zero length call to monitor_read_memory\n");
return 0;
}
monitor_debug ("MON read block ta(%s) ha(%lx) %d\n",
paddress (target_gdbarch, memaddr), (long) myaddr, len);
if (current_monitor->flags & MO_ADDR_BITS_REMOVE)
memaddr = gdbarch_addr_bits_remove (target_gdbarch, memaddr);
if (current_monitor->flags & MO_GETMEM_READ_SINGLE)
return monitor_read_memory_single (memaddr, myaddr, len);
len = min (len, 16);
/* Some dumpers align the first data with the preceeding 16
byte boundary. Some print blanks and start at the
requested boundary. EXACT_DUMPADDR
*/
dumpaddr = (current_monitor->flags & MO_EXACT_DUMPADDR)
? memaddr : memaddr & ~0x0f;
/* See if xfer would cross a 16 byte boundary. If so, clip it. */
if (((memaddr ^ (memaddr + len - 1)) & ~0xf) != 0)
len = ((memaddr + len) & ~0xf) - memaddr;
/* send the memory examine command */
if (current_monitor->flags & MO_GETMEM_NEEDS_RANGE)
monitor_printf (current_monitor->getmem.cmdb, memaddr, memaddr + len);
else if (current_monitor->flags & MO_GETMEM_16_BOUNDARY)
monitor_printf (current_monitor->getmem.cmdb, dumpaddr);
else
monitor_printf (current_monitor->getmem.cmdb, memaddr, len);
/* If TERM is present, we wait for that to show up. Also, (if TERM
is present), we will send TERM_CMD if that is present. In any
case, we collect all of the output into buf, and then wait for
the normal prompt. */
if (current_monitor->getmem.term)
{
resp_len = monitor_expect (current_monitor->getmem.term, buf, sizeof buf); /* get response */
if (resp_len <= 0)
monitor_error ("monitor_read_memory",
"excessive response from monitor",
memaddr, resp_len, buf, 0);
if (current_monitor->getmem.term_cmd)
{
serial_write (monitor_desc, current_monitor->getmem.term_cmd,
strlen (current_monitor->getmem.term_cmd));
monitor_expect_prompt (NULL, 0);
}
}
else
resp_len = monitor_expect_prompt (buf, sizeof buf); /* get response */
p = buf;
/* If RESP_DELIM is specified, we search for that as a leading
delimiter for the values. Otherwise, we just start searching
from the start of the buf. */
if (current_monitor->getmem.resp_delim)
{
int retval, tmp;
struct re_registers resp_strings;
monitor_debug ("MON getmem.resp_delim %s\n", current_monitor->getmem.resp_delim);
memset (&resp_strings, 0, sizeof (struct re_registers));
tmp = strlen (p);
retval = re_search (&getmem_resp_delim_pattern, p, tmp, 0, tmp,
&resp_strings);
if (retval < 0)
monitor_error ("monitor_read_memory",
"bad response from monitor",
memaddr, resp_len, buf, 0);
p += resp_strings.end[0];
#if 0
p = strstr (p, current_monitor->getmem.resp_delim);
if (!p)
monitor_error ("monitor_read_memory",
"bad response from monitor",
memaddr, resp_len, buf, 0);
p += strlen (current_monitor->getmem.resp_delim);
#endif
}
monitor_debug ("MON scanning %d ,%lx '%s'\n", len, (long) p, p);
if (current_monitor->flags & MO_GETMEM_16_BOUNDARY)
{
char c;
int fetched = 0;
i = len;
c = *p;
while (!(c == '\000' || c == '\n' || c == '\r') && i > 0)
{
if (isxdigit (c))
{
if ((dumpaddr >= memaddr) && (i > 0))
{
val = fromhex (c) * 16 + fromhex (*(p + 1));
*myaddr++ = val;
if (monitor_debug_p || remote_debug)
fprintf_unfiltered (gdb_stdlog, "[%02x]", val);
--i;
fetched++;
}
++dumpaddr;
++p;
}
++p; /* skip a blank or other non hex char */
c = *p;
}
if (fetched == 0)
error (_("Failed to read via monitor"));
if (monitor_debug_p || remote_debug)
fprintf_unfiltered (gdb_stdlog, "\n");
return fetched; /* Return the number of bytes actually read */
}
monitor_debug ("MON scanning bytes\n");
for (i = len; i > 0; i--)
{
/* Skip non-hex chars, but bomb on end of string and newlines */
while (1)
{
if (isxdigit (*p))
break;
if (*p == '\000' || *p == '\n' || *p == '\r')
monitor_error ("monitor_read_memory",
"badly terminated response from monitor",
memaddr, resp_len, buf, 0);
p++;
}
val = strtoul (p, &p1, 16);
if (val == 0 && p == p1)
monitor_error ("monitor_read_memory",
"bad value from monitor",
memaddr, resp_len, buf, 0);
*myaddr++ = val;
if (i == 1)
break;
p = p1;
}
return len;
}
/* Transfer LEN bytes between target address MEMADDR and GDB address
MYADDR. Returns 0 for success, errno code for failure. TARGET is
unused. */
static int
monitor_xfer_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len, int write,
struct mem_attrib *attrib, struct target_ops *target)
{
int res;
if (write)
{
if (current_monitor->flags & MO_HAS_BLOCKWRITES)
res = monitor_write_memory_block(memaddr, myaddr, len);
else
res = monitor_write_memory(memaddr, myaddr, len);
}
else
{
res = monitor_read_memory(memaddr, myaddr, len);
}
return res;
}
static void
monitor_kill (struct target_ops *ops)
{
return; /* ignore attempts to kill target system */
}
/* All we actually do is set the PC to the start address of exec_bfd. */
static void
monitor_create_inferior (struct target_ops *ops, char *exec_file,
char *args, char **env, int from_tty)
{
if (args && (*args != '\000'))
error (_("Args are not supported by the monitor."));
first_time = 1;
clear_proceed_status ();
regcache_write_pc (get_current_regcache (),
bfd_get_start_address (exec_bfd));
}
/* Clean up when a program exits.
The program actually lives on in the remote processor's RAM, and may be
run again without a download. Don't leave it full of breakpoint
instructions. */
static void
monitor_mourn_inferior (struct target_ops *ops)
{
unpush_target (targ_ops);
generic_mourn_inferior (); /* Do all the proper things now */
delete_thread_silent (monitor_ptid);
}
/* Tell the monitor to add a breakpoint. */
static int
monitor_insert_breakpoint (struct gdbarch *gdbarch,
struct bp_target_info *bp_tgt)
{
CORE_ADDR addr = bp_tgt->placed_address;
int i;
int bplen;
monitor_debug ("MON inst bkpt %s\n", paddress (gdbarch, addr));
if (current_monitor->set_break == NULL)
error (_("No set_break defined for this monitor"));
if (current_monitor->flags & MO_ADDR_BITS_REMOVE)
addr = gdbarch_addr_bits_remove (gdbarch, addr);
/* Determine appropriate breakpoint size for this address. */
gdbarch_breakpoint_from_pc (gdbarch, &addr, &bplen);
bp_tgt->placed_address = addr;
bp_tgt->placed_size = bplen;
for (i = 0; i < current_monitor->num_breakpoints; i++)
{
if (breakaddr[i] == 0)
{
breakaddr[i] = addr;
monitor_printf (current_monitor->set_break, addr);
monitor_expect_prompt (NULL, 0);
return 0;
}
}
error (_("Too many breakpoints (> %d) for monitor."), current_monitor->num_breakpoints);
}
/* Tell the monitor to remove a breakpoint. */
static int
monitor_remove_breakpoint (struct gdbarch *gdbarch,
struct bp_target_info *bp_tgt)
{
CORE_ADDR addr = bp_tgt->placed_address;
int i;
monitor_debug ("MON rmbkpt %s\n", paddress (gdbarch, addr));
if (current_monitor->clr_break == NULL)
error (_("No clr_break defined for this monitor"));
for (i = 0; i < current_monitor->num_breakpoints; i++)
{
if (breakaddr[i] == addr)
{
breakaddr[i] = 0;
/* some monitors remove breakpoints based on the address */
if (current_monitor->flags & MO_CLR_BREAK_USES_ADDR)
monitor_printf (current_monitor->clr_break, addr);
else if (current_monitor->flags & MO_CLR_BREAK_1_BASED)
monitor_printf (current_monitor->clr_break, i + 1);
else
monitor_printf (current_monitor->clr_break, i);
monitor_expect_prompt (NULL, 0);
return 0;
}
}
fprintf_unfiltered (gdb_stderr,
"Can't find breakpoint associated with %s\n",
paddress (gdbarch, addr));
return 1;
}
/* monitor_wait_srec_ack -- wait for the target to send an acknowledgement for
an S-record. Return non-zero if the ACK is received properly. */
static int
monitor_wait_srec_ack (void)
{
int ch;
if (current_monitor->flags & MO_SREC_ACK_PLUS)
{
return (readchar (timeout) == '+');
}
else if (current_monitor->flags & MO_SREC_ACK_ROTATE)
{
/* Eat two backspaces, a "rotating" char (|/-\), and a space. */
if ((ch = readchar (1)) < 0)
return 0;
if ((ch = readchar (1)) < 0)
return 0;
if ((ch = readchar (1)) < 0)
return 0;
if ((ch = readchar (1)) < 0)
return 0;
}
return 1;
}
/* monitor_load -- download a file. */
static void
monitor_load (char *file, int from_tty)
{
monitor_debug ("MON load\n");
if (current_monitor->load_routine)
current_monitor->load_routine (monitor_desc, file, hashmark);
else
{ /* The default is ascii S-records */
int n;
unsigned long load_offset;
char buf[128];
/* enable user to specify address for downloading as 2nd arg to load */
n = sscanf (file, "%s 0x%lx", buf, &load_offset);
if (n > 1)
file = buf;
else
load_offset = 0;
monitor_printf (current_monitor->load);
if (current_monitor->loadresp)
monitor_expect (current_monitor->loadresp, NULL, 0);
load_srec (monitor_desc, file, (bfd_vma) load_offset,
32, SREC_ALL, hashmark,
current_monitor->flags & MO_SREC_ACK ?
monitor_wait_srec_ack : NULL);
monitor_expect_prompt (NULL, 0);
}
/* Finally, make the PC point at the start address */
if (exec_bfd)
regcache_write_pc (get_current_regcache (),
bfd_get_start_address (exec_bfd));
/* There used to be code here which would clear inferior_ptid and
call clear_symtab_users. None of that should be necessary:
monitor targets should behave like remote protocol targets, and
since generic_load does none of those things, this function
shouldn't either.
Furthermore, clearing inferior_ptid is *incorrect*. After doing
a load, we still have a valid connection to the monitor, with a
live processor state to fiddle with. The user can type
`continue' or `jump *start' and make the program run. If they do
these things, however, GDB will be talking to a running program
while inferior_ptid is null_ptid; this makes things like
reinit_frame_cache very confused. */
}
static void
monitor_stop (ptid_t ptid)
{
monitor_debug ("MON stop\n");
if ((current_monitor->flags & MO_SEND_BREAK_ON_STOP) != 0)
serial_send_break (monitor_desc);
if (current_monitor->stop)
monitor_printf_noecho (current_monitor->stop);
}
/* Put a COMMAND string out to MONITOR. Output from MONITOR is placed
in OUTPUT until the prompt is seen. FIXME: We read the characters
ourseleves here cause of a nasty echo. */
static void
monitor_rcmd (char *command,
struct ui_file *outbuf)
{
char *p;
int resp_len;
char buf[1000];
if (monitor_desc == NULL)
error (_("monitor target not open."));
p = current_monitor->prompt;
/* Send the command. Note that if no args were supplied, then we're
just sending the monitor a newline, which is sometimes useful. */
monitor_printf ("%s\r", (command ? command : ""));
resp_len = monitor_expect_prompt (buf, sizeof buf);
fputs_unfiltered (buf, outbuf); /* Output the response */
}
/* Convert hex digit A to a number. */
#if 0
static int
from_hex (int a)
{
if (a >= '0' && a <= '9')
return a - '0';
if (a >= 'a' && a <= 'f')
return a - 'a' + 10;
if (a >= 'A' && a <= 'F')
return a - 'A' + 10;
error (_("Reply contains invalid hex digit 0x%x"), a);
}
#endif
char *
monitor_get_dev_name (void)
{
return dev_name;
}
/* Check to see if a thread is still alive. */
static int
monitor_thread_alive (struct target_ops *ops, ptid_t ptid)
{
if (ptid_equal (ptid, monitor_ptid))
/* The monitor's task is always alive. */
return 1;
return 0;
}
/* Convert a thread ID to a string. Returns the string in a static
buffer. */
static char *
monitor_pid_to_str (struct target_ops *ops, ptid_t ptid)
{
static char buf[64];
if (ptid_equal (monitor_ptid, ptid))
{
xsnprintf (buf, sizeof buf, "Thread <main>");
return buf;
}
return normal_pid_to_str (ptid);
}
static struct target_ops monitor_ops;
static void
init_base_monitor_ops (void)
{
monitor_ops.to_close = monitor_close;
monitor_ops.to_detach = monitor_detach;
monitor_ops.to_resume = monitor_resume;
monitor_ops.to_wait = monitor_wait;
monitor_ops.to_fetch_registers = monitor_fetch_registers;
monitor_ops.to_store_registers = monitor_store_registers;
monitor_ops.to_prepare_to_store = monitor_prepare_to_store;
monitor_ops.deprecated_xfer_memory = monitor_xfer_memory;
monitor_ops.to_files_info = monitor_files_info;
monitor_ops.to_insert_breakpoint = monitor_insert_breakpoint;
monitor_ops.to_remove_breakpoint = monitor_remove_breakpoint;
monitor_ops.to_kill = monitor_kill;
monitor_ops.to_load = monitor_load;
monitor_ops.to_create_inferior = monitor_create_inferior;
monitor_ops.to_mourn_inferior = monitor_mourn_inferior;
monitor_ops.to_stop = monitor_stop;
monitor_ops.to_rcmd = monitor_rcmd;
monitor_ops.to_log_command = serial_log_command;
monitor_ops.to_thread_alive = monitor_thread_alive;
monitor_ops.to_pid_to_str = monitor_pid_to_str;
monitor_ops.to_stratum = process_stratum;
monitor_ops.to_has_all_memory = default_child_has_all_memory;
monitor_ops.to_has_memory = default_child_has_memory;
monitor_ops.to_has_stack = default_child_has_stack;
monitor_ops.to_has_registers = default_child_has_registers;
monitor_ops.to_has_execution = default_child_has_execution;
monitor_ops.to_magic = OPS_MAGIC;
} /* init_base_monitor_ops */
/* Init the target_ops structure pointed at by OPS */
void
init_monitor_ops (struct target_ops *ops)
{
if (monitor_ops.to_magic != OPS_MAGIC)
init_base_monitor_ops ();
memcpy (ops, &monitor_ops, sizeof monitor_ops);
}
/* Define additional commands that are usually only used by monitors. */
extern initialize_file_ftype _initialize_remote_monitors; /* -Wmissing-prototypes */
void
_initialize_remote_monitors (void)
{
init_base_monitor_ops ();
add_setshow_boolean_cmd ("hash", no_class, &hashmark, _("\
Set display of activity while downloading a file."), _("\
Show display of activity while downloading a file."), _("\
When enabled, a hashmark \'#\' is displayed."),
NULL,
NULL, /* FIXME: i18n: */
&setlist, &showlist);
add_setshow_zinteger_cmd ("monitor", no_class, &monitor_debug_p, _("\
Set debugging of remote monitor communication."), _("\
Show debugging of remote monitor communication."), _("\
When enabled, communication between GDB and the remote monitor\n\
is displayed."),
NULL,
NULL, /* FIXME: i18n: */
&setdebuglist, &showdebuglist);
/* Yes, 42000 is arbitrary. The only sense out of it, is that it
isn't 0. */
monitor_ptid = ptid_build (42000, 0, 42000);
}