| /* Select target systems and architectures at runtime for GDB. |
| |
| Copyright (C) 1990-2016 Free Software Foundation, Inc. |
| |
| Contributed by Cygnus Support. |
| |
| This file is part of GDB. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| |
| #include "defs.h" |
| #include "target.h" |
| #include "target-dcache.h" |
| #include "gdbcmd.h" |
| #include "symtab.h" |
| #include "inferior.h" |
| #include "infrun.h" |
| #include "bfd.h" |
| #include "symfile.h" |
| #include "objfiles.h" |
| #include "dcache.h" |
| #include <signal.h> |
| #include "regcache.h" |
| #include "gdbcore.h" |
| #include "target-descriptions.h" |
| #include "gdbthread.h" |
| #include "solib.h" |
| #include "exec.h" |
| #include "inline-frame.h" |
| #include "tracepoint.h" |
| #include "gdb/fileio.h" |
| #include "agent.h" |
| #include "auxv.h" |
| #include "target-debug.h" |
| |
| static void target_info (char *, int); |
| |
| static void generic_tls_error (void) ATTRIBUTE_NORETURN; |
| |
| static void default_terminal_info (struct target_ops *, const char *, int); |
| |
| static int default_watchpoint_addr_within_range (struct target_ops *, |
| CORE_ADDR, CORE_ADDR, int); |
| |
| static int default_region_ok_for_hw_watchpoint (struct target_ops *, |
| CORE_ADDR, int); |
| |
| static void default_rcmd (struct target_ops *, const char *, struct ui_file *); |
| |
| static ptid_t default_get_ada_task_ptid (struct target_ops *self, |
| long lwp, long tid); |
| |
| static int default_follow_fork (struct target_ops *self, int follow_child, |
| int detach_fork); |
| |
| static void default_mourn_inferior (struct target_ops *self); |
| |
| static int default_search_memory (struct target_ops *ops, |
| CORE_ADDR start_addr, |
| ULONGEST search_space_len, |
| const gdb_byte *pattern, |
| ULONGEST pattern_len, |
| CORE_ADDR *found_addrp); |
| |
| static int default_verify_memory (struct target_ops *self, |
| const gdb_byte *data, |
| CORE_ADDR memaddr, ULONGEST size); |
| |
| static struct address_space *default_thread_address_space |
| (struct target_ops *self, ptid_t ptid); |
| |
| static void tcomplain (void) ATTRIBUTE_NORETURN; |
| |
| static int return_zero (struct target_ops *); |
| |
| static int return_zero_has_execution (struct target_ops *, ptid_t); |
| |
| static void target_command (char *, int); |
| |
| static struct target_ops *find_default_run_target (char *); |
| |
| static struct gdbarch *default_thread_architecture (struct target_ops *ops, |
| ptid_t ptid); |
| |
| static int dummy_find_memory_regions (struct target_ops *self, |
| find_memory_region_ftype ignore1, |
| void *ignore2); |
| |
| static char *dummy_make_corefile_notes (struct target_ops *self, |
| bfd *ignore1, int *ignore2); |
| |
| static char *default_pid_to_str (struct target_ops *ops, ptid_t ptid); |
| |
| static enum exec_direction_kind default_execution_direction |
| (struct target_ops *self); |
| |
| static struct target_ops debug_target; |
| |
| #include "target-delegates.c" |
| |
| static void init_dummy_target (void); |
| |
| static void update_current_target (void); |
| |
| /* Vector of existing target structures. */ |
| typedef struct target_ops *target_ops_p; |
| DEF_VEC_P (target_ops_p); |
| static VEC (target_ops_p) *target_structs; |
| |
| /* The initial current target, so that there is always a semi-valid |
| current target. */ |
| |
| static struct target_ops dummy_target; |
| |
| /* Top of target stack. */ |
| |
| static struct target_ops *target_stack; |
| |
| /* The target structure we are currently using to talk to a process |
| or file or whatever "inferior" we have. */ |
| |
| struct target_ops current_target; |
| |
| /* Command list for target. */ |
| |
| static struct cmd_list_element *targetlist = NULL; |
| |
| /* Nonzero if we should trust readonly sections from the |
| executable when reading memory. */ |
| |
| static int trust_readonly = 0; |
| |
| /* Nonzero if we should show true memory content including |
| memory breakpoint inserted by gdb. */ |
| |
| static int show_memory_breakpoints = 0; |
| |
| /* These globals control whether GDB attempts to perform these |
| operations; they are useful for targets that need to prevent |
| inadvertant disruption, such as in non-stop mode. */ |
| |
| int may_write_registers = 1; |
| |
| int may_write_memory = 1; |
| |
| int may_insert_breakpoints = 1; |
| |
| int may_insert_tracepoints = 1; |
| |
| int may_insert_fast_tracepoints = 1; |
| |
| int may_stop = 1; |
| |
| /* Non-zero if we want to see trace of target level stuff. */ |
| |
| static unsigned int targetdebug = 0; |
| |
| static void |
| set_targetdebug (char *args, int from_tty, struct cmd_list_element *c) |
| { |
| update_current_target (); |
| } |
| |
| static void |
| show_targetdebug (struct ui_file *file, int from_tty, |
| struct cmd_list_element *c, const char *value) |
| { |
| fprintf_filtered (file, _("Target debugging is %s.\n"), value); |
| } |
| |
| static void setup_target_debug (void); |
| |
| /* The user just typed 'target' without the name of a target. */ |
| |
| static void |
| target_command (char *arg, int from_tty) |
| { |
| fputs_filtered ("Argument required (target name). Try `help target'\n", |
| gdb_stdout); |
| } |
| |
| /* Default target_has_* methods for process_stratum targets. */ |
| |
| int |
| default_child_has_all_memory (struct target_ops *ops) |
| { |
| /* If no inferior selected, then we can't read memory here. */ |
| if (ptid_equal (inferior_ptid, null_ptid)) |
| return 0; |
| |
| return 1; |
| } |
| |
| int |
| default_child_has_memory (struct target_ops *ops) |
| { |
| /* If no inferior selected, then we can't read memory here. */ |
| if (ptid_equal (inferior_ptid, null_ptid)) |
| return 0; |
| |
| return 1; |
| } |
| |
| int |
| default_child_has_stack (struct target_ops *ops) |
| { |
| /* If no inferior selected, there's no stack. */ |
| if (ptid_equal (inferior_ptid, null_ptid)) |
| return 0; |
| |
| return 1; |
| } |
| |
| int |
| default_child_has_registers (struct target_ops *ops) |
| { |
| /* Can't read registers from no inferior. */ |
| if (ptid_equal (inferior_ptid, null_ptid)) |
| return 0; |
| |
| return 1; |
| } |
| |
| int |
| default_child_has_execution (struct target_ops *ops, ptid_t the_ptid) |
| { |
| /* If there's no thread selected, then we can't make it run through |
| hoops. */ |
| if (ptid_equal (the_ptid, null_ptid)) |
| return 0; |
| |
| return 1; |
| } |
| |
| |
| int |
| target_has_all_memory_1 (void) |
| { |
| struct target_ops *t; |
| |
| for (t = current_target.beneath; t != NULL; t = t->beneath) |
| if (t->to_has_all_memory (t)) |
| return 1; |
| |
| return 0; |
| } |
| |
| int |
| target_has_memory_1 (void) |
| { |
| struct target_ops *t; |
| |
| for (t = current_target.beneath; t != NULL; t = t->beneath) |
| if (t->to_has_memory (t)) |
| return 1; |
| |
| return 0; |
| } |
| |
| int |
| target_has_stack_1 (void) |
| { |
| struct target_ops *t; |
| |
| for (t = current_target.beneath; t != NULL; t = t->beneath) |
| if (t->to_has_stack (t)) |
| return 1; |
| |
| return 0; |
| } |
| |
| int |
| target_has_registers_1 (void) |
| { |
| struct target_ops *t; |
| |
| for (t = current_target.beneath; t != NULL; t = t->beneath) |
| if (t->to_has_registers (t)) |
| return 1; |
| |
| return 0; |
| } |
| |
| int |
| target_has_execution_1 (ptid_t the_ptid) |
| { |
| struct target_ops *t; |
| |
| for (t = current_target.beneath; t != NULL; t = t->beneath) |
| if (t->to_has_execution (t, the_ptid)) |
| return 1; |
| |
| return 0; |
| } |
| |
| int |
| target_has_execution_current (void) |
| { |
| return target_has_execution_1 (inferior_ptid); |
| } |
| |
| /* Complete initialization of T. This ensures that various fields in |
| T are set, if needed by the target implementation. */ |
| |
| void |
| complete_target_initialization (struct target_ops *t) |
| { |
| /* Provide default values for all "must have" methods. */ |
| |
| if (t->to_has_all_memory == NULL) |
| t->to_has_all_memory = return_zero; |
| |
| if (t->to_has_memory == NULL) |
| t->to_has_memory = return_zero; |
| |
| if (t->to_has_stack == NULL) |
| t->to_has_stack = return_zero; |
| |
| if (t->to_has_registers == NULL) |
| t->to_has_registers = return_zero; |
| |
| if (t->to_has_execution == NULL) |
| t->to_has_execution = return_zero_has_execution; |
| |
| /* These methods can be called on an unpushed target and so require |
| a default implementation if the target might plausibly be the |
| default run target. */ |
| gdb_assert (t->to_can_run == NULL || (t->to_can_async_p != NULL |
| && t->to_supports_non_stop != NULL)); |
| |
| install_delegators (t); |
| } |
| |
| /* This is used to implement the various target commands. */ |
| |
| static void |
| open_target (char *args, int from_tty, struct cmd_list_element *command) |
| { |
| struct target_ops *ops = (struct target_ops *) get_cmd_context (command); |
| |
| if (targetdebug) |
| fprintf_unfiltered (gdb_stdlog, "-> %s->to_open (...)\n", |
| ops->to_shortname); |
| |
| ops->to_open (args, from_tty); |
| |
| if (targetdebug) |
| fprintf_unfiltered (gdb_stdlog, "<- %s->to_open (%s, %d)\n", |
| ops->to_shortname, args, from_tty); |
| } |
| |
| /* Add possible target architecture T to the list and add a new |
| command 'target T->to_shortname'. Set COMPLETER as the command's |
| completer if not NULL. */ |
| |
| void |
| add_target_with_completer (struct target_ops *t, |
| completer_ftype *completer) |
| { |
| struct cmd_list_element *c; |
| |
| complete_target_initialization (t); |
| |
| VEC_safe_push (target_ops_p, target_structs, t); |
| |
| if (targetlist == NULL) |
| add_prefix_cmd ("target", class_run, target_command, _("\ |
| Connect to a target machine or process.\n\ |
| The first argument is the type or protocol of the target machine.\n\ |
| Remaining arguments are interpreted by the target protocol. For more\n\ |
| information on the arguments for a particular protocol, type\n\ |
| `help target ' followed by the protocol name."), |
| &targetlist, "target ", 0, &cmdlist); |
| c = add_cmd (t->to_shortname, no_class, NULL, t->to_doc, &targetlist); |
| set_cmd_sfunc (c, open_target); |
| set_cmd_context (c, t); |
| if (completer != NULL) |
| set_cmd_completer (c, completer); |
| } |
| |
| /* Add a possible target architecture to the list. */ |
| |
| void |
| add_target (struct target_ops *t) |
| { |
| add_target_with_completer (t, NULL); |
| } |
| |
| /* See target.h. */ |
| |
| void |
| add_deprecated_target_alias (struct target_ops *t, char *alias) |
| { |
| struct cmd_list_element *c; |
| char *alt; |
| |
| /* If we use add_alias_cmd, here, we do not get the deprecated warning, |
| see PR cli/15104. */ |
| c = add_cmd (alias, no_class, NULL, t->to_doc, &targetlist); |
| set_cmd_sfunc (c, open_target); |
| set_cmd_context (c, t); |
| alt = xstrprintf ("target %s", t->to_shortname); |
| deprecate_cmd (c, alt); |
| } |
| |
| /* Stub functions */ |
| |
| void |
| target_kill (void) |
| { |
| current_target.to_kill (¤t_target); |
| } |
| |
| void |
| target_load (const char *arg, int from_tty) |
| { |
| target_dcache_invalidate (); |
| (*current_target.to_load) (¤t_target, arg, from_tty); |
| } |
| |
| /* Possible terminal states. */ |
| |
| enum terminal_state |
| { |
| /* The inferior's terminal settings are in effect. */ |
| terminal_is_inferior = 0, |
| |
| /* Some of our terminal settings are in effect, enough to get |
| proper output. */ |
| terminal_is_ours_for_output = 1, |
| |
| /* Our terminal settings are in effect, for output and input. */ |
| terminal_is_ours = 2 |
| }; |
| |
| static enum terminal_state terminal_state = terminal_is_ours; |
| |
| /* See target.h. */ |
| |
| void |
| target_terminal_init (void) |
| { |
| (*current_target.to_terminal_init) (¤t_target); |
| |
| terminal_state = terminal_is_ours; |
| } |
| |
| /* See target.h. */ |
| |
| int |
| target_terminal_is_inferior (void) |
| { |
| return (terminal_state == terminal_is_inferior); |
| } |
| |
| /* See target.h. */ |
| |
| int |
| target_terminal_is_ours (void) |
| { |
| return (terminal_state == terminal_is_ours); |
| } |
| |
| /* See target.h. */ |
| |
| void |
| target_terminal_inferior (void) |
| { |
| /* A background resume (``run&'') should leave GDB in control of the |
| terminal. Use target_can_async_p, not target_is_async_p, since at |
| this point the target is not async yet. However, if sync_execution |
| is not set, we know it will become async prior to resume. */ |
| if (target_can_async_p () && !sync_execution) |
| return; |
| |
| if (terminal_state == terminal_is_inferior) |
| return; |
| |
| /* If GDB is resuming the inferior in the foreground, install |
| inferior's terminal modes. */ |
| (*current_target.to_terminal_inferior) (¤t_target); |
| terminal_state = terminal_is_inferior; |
| } |
| |
| /* See target.h. */ |
| |
| void |
| target_terminal_ours (void) |
| { |
| if (terminal_state == terminal_is_ours) |
| return; |
| |
| (*current_target.to_terminal_ours) (¤t_target); |
| terminal_state = terminal_is_ours; |
| } |
| |
| /* See target.h. */ |
| |
| void |
| target_terminal_ours_for_output (void) |
| { |
| if (terminal_state != terminal_is_inferior) |
| return; |
| (*current_target.to_terminal_ours_for_output) (¤t_target); |
| terminal_state = terminal_is_ours_for_output; |
| } |
| |
| /* See target.h. */ |
| |
| int |
| target_supports_terminal_ours (void) |
| { |
| struct target_ops *t; |
| |
| for (t = current_target.beneath; t != NULL; t = t->beneath) |
| { |
| if (t->to_terminal_ours != delegate_terminal_ours |
| && t->to_terminal_ours != tdefault_terminal_ours) |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| /* Restore the terminal to its previous state (helper for |
| make_cleanup_restore_target_terminal). */ |
| |
| static void |
| cleanup_restore_target_terminal (void *arg) |
| { |
| enum terminal_state *previous_state = (enum terminal_state *) arg; |
| |
| switch (*previous_state) |
| { |
| case terminal_is_ours: |
| target_terminal_ours (); |
| break; |
| case terminal_is_ours_for_output: |
| target_terminal_ours_for_output (); |
| break; |
| case terminal_is_inferior: |
| target_terminal_inferior (); |
| break; |
| } |
| } |
| |
| /* See target.h. */ |
| |
| struct cleanup * |
| make_cleanup_restore_target_terminal (void) |
| { |
| enum terminal_state *ts = XNEW (enum terminal_state); |
| |
| *ts = terminal_state; |
| |
| return make_cleanup_dtor (cleanup_restore_target_terminal, ts, xfree); |
| } |
| |
| static void |
| tcomplain (void) |
| { |
| error (_("You can't do that when your target is `%s'"), |
| current_target.to_shortname); |
| } |
| |
| void |
| noprocess (void) |
| { |
| error (_("You can't do that without a process to debug.")); |
| } |
| |
| static void |
| default_terminal_info (struct target_ops *self, const char *args, int from_tty) |
| { |
| printf_unfiltered (_("No saved terminal information.\n")); |
| } |
| |
| /* A default implementation for the to_get_ada_task_ptid target method. |
| |
| This function builds the PTID by using both LWP and TID as part of |
| the PTID lwp and tid elements. The pid used is the pid of the |
| inferior_ptid. */ |
| |
| static ptid_t |
| default_get_ada_task_ptid (struct target_ops *self, long lwp, long tid) |
| { |
| return ptid_build (ptid_get_pid (inferior_ptid), lwp, tid); |
| } |
| |
| static enum exec_direction_kind |
| default_execution_direction (struct target_ops *self) |
| { |
| if (!target_can_execute_reverse) |
| return EXEC_FORWARD; |
| else if (!target_can_async_p ()) |
| return EXEC_FORWARD; |
| else |
| gdb_assert_not_reached ("\ |
| to_execution_direction must be implemented for reverse async"); |
| } |
| |
| /* Go through the target stack from top to bottom, copying over zero |
| entries in current_target, then filling in still empty entries. In |
| effect, we are doing class inheritance through the pushed target |
| vectors. |
| |
| NOTE: cagney/2003-10-17: The problem with this inheritance, as it |
| is currently implemented, is that it discards any knowledge of |
| which target an inherited method originally belonged to. |
| Consequently, new new target methods should instead explicitly and |
| locally search the target stack for the target that can handle the |
| request. */ |
| |
| static void |
| update_current_target (void) |
| { |
| struct target_ops *t; |
| |
| /* First, reset current's contents. */ |
| memset (¤t_target, 0, sizeof (current_target)); |
| |
| /* Install the delegators. */ |
| install_delegators (¤t_target); |
| |
| current_target.to_stratum = target_stack->to_stratum; |
| |
| #define INHERIT(FIELD, TARGET) \ |
| if (!current_target.FIELD) \ |
| current_target.FIELD = (TARGET)->FIELD |
| |
| /* Do not add any new INHERITs here. Instead, use the delegation |
| mechanism provided by make-target-delegates. */ |
| for (t = target_stack; t; t = t->beneath) |
| { |
| INHERIT (to_shortname, t); |
| INHERIT (to_longname, t); |
| INHERIT (to_attach_no_wait, t); |
| INHERIT (to_have_steppable_watchpoint, t); |
| INHERIT (to_have_continuable_watchpoint, t); |
| INHERIT (to_has_thread_control, t); |
| } |
| #undef INHERIT |
| |
| /* Finally, position the target-stack beneath the squashed |
| "current_target". That way code looking for a non-inherited |
| target method can quickly and simply find it. */ |
| current_target.beneath = target_stack; |
| |
| if (targetdebug) |
| setup_target_debug (); |
| } |
| |
| /* Push a new target type into the stack of the existing target accessors, |
| possibly superseding some of the existing accessors. |
| |
| Rather than allow an empty stack, we always have the dummy target at |
| the bottom stratum, so we can call the function vectors without |
| checking them. */ |
| |
| void |
| push_target (struct target_ops *t) |
| { |
| struct target_ops **cur; |
| |
| /* Check magic number. If wrong, it probably means someone changed |
| the struct definition, but not all the places that initialize one. */ |
| if (t->to_magic != OPS_MAGIC) |
| { |
| fprintf_unfiltered (gdb_stderr, |
| "Magic number of %s target struct wrong\n", |
| t->to_shortname); |
| internal_error (__FILE__, __LINE__, |
| _("failed internal consistency check")); |
| } |
| |
| /* Find the proper stratum to install this target in. */ |
| for (cur = &target_stack; (*cur) != NULL; cur = &(*cur)->beneath) |
| { |
| if ((int) (t->to_stratum) >= (int) (*cur)->to_stratum) |
| break; |
| } |
| |
| /* If there's already targets at this stratum, remove them. */ |
| /* FIXME: cagney/2003-10-15: I think this should be popping all |
| targets to CUR, and not just those at this stratum level. */ |
| while ((*cur) != NULL && t->to_stratum == (*cur)->to_stratum) |
| { |
| /* There's already something at this stratum level. Close it, |
| and un-hook it from the stack. */ |
| struct target_ops *tmp = (*cur); |
| |
| (*cur) = (*cur)->beneath; |
| tmp->beneath = NULL; |
| target_close (tmp); |
| } |
| |
| /* We have removed all targets in our stratum, now add the new one. */ |
| t->beneath = (*cur); |
| (*cur) = t; |
| |
| update_current_target (); |
| } |
| |
| /* Remove a target_ops vector from the stack, wherever it may be. |
| Return how many times it was removed (0 or 1). */ |
| |
| int |
| unpush_target (struct target_ops *t) |
| { |
| struct target_ops **cur; |
| struct target_ops *tmp; |
| |
| if (t->to_stratum == dummy_stratum) |
| internal_error (__FILE__, __LINE__, |
| _("Attempt to unpush the dummy target")); |
| |
| /* Look for the specified target. Note that we assume that a target |
| can only occur once in the target stack. */ |
| |
| for (cur = &target_stack; (*cur) != NULL; cur = &(*cur)->beneath) |
| { |
| if ((*cur) == t) |
| break; |
| } |
| |
| /* If we don't find target_ops, quit. Only open targets should be |
| closed. */ |
| if ((*cur) == NULL) |
| return 0; |
| |
| /* Unchain the target. */ |
| tmp = (*cur); |
| (*cur) = (*cur)->beneath; |
| tmp->beneath = NULL; |
| |
| update_current_target (); |
| |
| /* Finally close the target. Note we do this after unchaining, so |
| any target method calls from within the target_close |
| implementation don't end up in T anymore. */ |
| target_close (t); |
| |
| return 1; |
| } |
| |
| /* Unpush TARGET and assert that it worked. */ |
| |
| static void |
| unpush_target_and_assert (struct target_ops *target) |
| { |
| if (!unpush_target (target)) |
| { |
| fprintf_unfiltered (gdb_stderr, |
| "pop_all_targets couldn't find target %s\n", |
| target->to_shortname); |
| internal_error (__FILE__, __LINE__, |
| _("failed internal consistency check")); |
| } |
| } |
| |
| void |
| pop_all_targets_above (enum strata above_stratum) |
| { |
| while ((int) (current_target.to_stratum) > (int) above_stratum) |
| unpush_target_and_assert (target_stack); |
| } |
| |
| /* See target.h. */ |
| |
| void |
| pop_all_targets_at_and_above (enum strata stratum) |
| { |
| while ((int) (current_target.to_stratum) >= (int) stratum) |
| unpush_target_and_assert (target_stack); |
| } |
| |
| void |
| pop_all_targets (void) |
| { |
| pop_all_targets_above (dummy_stratum); |
| } |
| |
| /* Return 1 if T is now pushed in the target stack. Return 0 otherwise. */ |
| |
| int |
| target_is_pushed (struct target_ops *t) |
| { |
| struct target_ops *cur; |
| |
| /* Check magic number. If wrong, it probably means someone changed |
| the struct definition, but not all the places that initialize one. */ |
| if (t->to_magic != OPS_MAGIC) |
| { |
| fprintf_unfiltered (gdb_stderr, |
| "Magic number of %s target struct wrong\n", |
| t->to_shortname); |
| internal_error (__FILE__, __LINE__, |
| _("failed internal consistency check")); |
| } |
| |
| for (cur = target_stack; cur != NULL; cur = cur->beneath) |
| if (cur == t) |
| return 1; |
| |
| return 0; |
| } |
| |
| /* Default implementation of to_get_thread_local_address. */ |
| |
| static void |
| generic_tls_error (void) |
| { |
| throw_error (TLS_GENERIC_ERROR, |
| _("Cannot find thread-local variables on this target")); |
| } |
| |
| /* Using the objfile specified in OBJFILE, find the address for the |
| current thread's thread-local storage with offset OFFSET. */ |
| CORE_ADDR |
| target_translate_tls_address (struct objfile *objfile, CORE_ADDR offset) |
| { |
| volatile CORE_ADDR addr = 0; |
| struct target_ops *target = ¤t_target; |
| |
| if (gdbarch_fetch_tls_load_module_address_p (target_gdbarch ())) |
| { |
| ptid_t ptid = inferior_ptid; |
| |
| TRY |
| { |
| CORE_ADDR lm_addr; |
| |
| /* Fetch the load module address for this objfile. */ |
| lm_addr = gdbarch_fetch_tls_load_module_address (target_gdbarch (), |
| objfile); |
| |
| addr = target->to_get_thread_local_address (target, ptid, |
| lm_addr, offset); |
| } |
| /* If an error occurred, print TLS related messages here. Otherwise, |
| throw the error to some higher catcher. */ |
| CATCH (ex, RETURN_MASK_ALL) |
| { |
| int objfile_is_library = (objfile->flags & OBJF_SHARED); |
| |
| switch (ex.error) |
| { |
| case TLS_NO_LIBRARY_SUPPORT_ERROR: |
| error (_("Cannot find thread-local variables " |
| "in this thread library.")); |
| break; |
| case TLS_LOAD_MODULE_NOT_FOUND_ERROR: |
| if (objfile_is_library) |
| error (_("Cannot find shared library `%s' in dynamic" |
| " linker's load module list"), objfile_name (objfile)); |
| else |
| error (_("Cannot find executable file `%s' in dynamic" |
| " linker's load module list"), objfile_name (objfile)); |
| break; |
| case TLS_NOT_ALLOCATED_YET_ERROR: |
| if (objfile_is_library) |
| error (_("The inferior has not yet allocated storage for" |
| " thread-local variables in\n" |
| "the shared library `%s'\n" |
| "for %s"), |
| objfile_name (objfile), target_pid_to_str (ptid)); |
| else |
| error (_("The inferior has not yet allocated storage for" |
| " thread-local variables in\n" |
| "the executable `%s'\n" |
| "for %s"), |
| objfile_name (objfile), target_pid_to_str (ptid)); |
| break; |
| case TLS_GENERIC_ERROR: |
| if (objfile_is_library) |
| error (_("Cannot find thread-local storage for %s, " |
| "shared library %s:\n%s"), |
| target_pid_to_str (ptid), |
| objfile_name (objfile), ex.message); |
| else |
| error (_("Cannot find thread-local storage for %s, " |
| "executable file %s:\n%s"), |
| target_pid_to_str (ptid), |
| objfile_name (objfile), ex.message); |
| break; |
| default: |
| throw_exception (ex); |
| break; |
| } |
| } |
| END_CATCH |
| } |
| /* It wouldn't be wrong here to try a gdbarch method, too; finding |
| TLS is an ABI-specific thing. But we don't do that yet. */ |
| else |
| error (_("Cannot find thread-local variables on this target")); |
| |
| return addr; |
| } |
| |
| const char * |
| target_xfer_status_to_string (enum target_xfer_status status) |
| { |
| #define CASE(X) case X: return #X |
| switch (status) |
| { |
| CASE(TARGET_XFER_E_IO); |
| CASE(TARGET_XFER_UNAVAILABLE); |
| default: |
| return "<unknown>"; |
| } |
| #undef CASE |
| }; |
| |
| |
| #undef MIN |
| #define MIN(A, B) (((A) <= (B)) ? (A) : (B)) |
| |
| /* target_read_string -- read a null terminated string, up to LEN bytes, |
| from MEMADDR in target. Set *ERRNOP to the errno code, or 0 if successful. |
| Set *STRING to a pointer to malloc'd memory containing the data; the caller |
| is responsible for freeing it. Return the number of bytes successfully |
| read. */ |
| |
| int |
| target_read_string (CORE_ADDR memaddr, char **string, int len, int *errnop) |
| { |
| int tlen, offset, i; |
| gdb_byte buf[4]; |
| int errcode = 0; |
| char *buffer; |
| int buffer_allocated; |
| char *bufptr; |
| unsigned int nbytes_read = 0; |
| |
| gdb_assert (string); |
| |
| /* Small for testing. */ |
| buffer_allocated = 4; |
| buffer = (char *) xmalloc (buffer_allocated); |
| bufptr = buffer; |
| |
| while (len > 0) |
| { |
| tlen = MIN (len, 4 - (memaddr & 3)); |
| offset = memaddr & 3; |
| |
| errcode = target_read_memory (memaddr & ~3, buf, sizeof buf); |
| if (errcode != 0) |
| { |
| /* The transfer request might have crossed the boundary to an |
| unallocated region of memory. Retry the transfer, requesting |
| a single byte. */ |
| tlen = 1; |
| offset = 0; |
| errcode = target_read_memory (memaddr, buf, 1); |
| if (errcode != 0) |
| goto done; |
| } |
| |
| if (bufptr - buffer + tlen > buffer_allocated) |
| { |
| unsigned int bytes; |
| |
| bytes = bufptr - buffer; |
| buffer_allocated *= 2; |
| buffer = (char *) xrealloc (buffer, buffer_allocated); |
| bufptr = buffer + bytes; |
| } |
| |
| for (i = 0; i < tlen; i++) |
| { |
| *bufptr++ = buf[i + offset]; |
| if (buf[i + offset] == '\000') |
| { |
| nbytes_read += i + 1; |
| goto done; |
| } |
| } |
| |
| memaddr += tlen; |
| len -= tlen; |
| nbytes_read += tlen; |
| } |
| done: |
| *string = buffer; |
| if (errnop != NULL) |
| *errnop = errcode; |
| return nbytes_read; |
| } |
| |
| struct target_section_table * |
| target_get_section_table (struct target_ops *target) |
| { |
| return (*target->to_get_section_table) (target); |
| } |
| |
| /* Find a section containing ADDR. */ |
| |
| struct target_section * |
| target_section_by_addr (struct target_ops *target, CORE_ADDR addr) |
| { |
| struct target_section_table *table = target_get_section_table (target); |
| struct target_section *secp; |
| |
| if (table == NULL) |
| return NULL; |
| |
| for (secp = table->sections; secp < table->sections_end; secp++) |
| { |
| if (addr >= secp->addr && addr < secp->endaddr) |
| return secp; |
| } |
| return NULL; |
| } |
| |
| |
| /* Helper for the memory xfer routines. Checks the attributes of the |
| memory region of MEMADDR against the read or write being attempted. |
| If the access is permitted returns true, otherwise returns false. |
| REGION_P is an optional output parameter. If not-NULL, it is |
| filled with a pointer to the memory region of MEMADDR. REG_LEN |
| returns LEN trimmed to the end of the region. This is how much the |
| caller can continue requesting, if the access is permitted. A |
| single xfer request must not straddle memory region boundaries. */ |
| |
| static int |
| memory_xfer_check_region (gdb_byte *readbuf, const gdb_byte *writebuf, |
| ULONGEST memaddr, ULONGEST len, ULONGEST *reg_len, |
| struct mem_region **region_p) |
| { |
| struct mem_region *region; |
| |
| region = lookup_mem_region (memaddr); |
| |
| if (region_p != NULL) |
| *region_p = region; |
| |
| switch (region->attrib.mode) |
| { |
| case MEM_RO: |
| if (writebuf != NULL) |
| return 0; |
| break; |
| |
| case MEM_WO: |
| if (readbuf != NULL) |
| return 0; |
| break; |
| |
| case MEM_FLASH: |
| /* We only support writing to flash during "load" for now. */ |
| if (writebuf != NULL) |
| error (_("Writing to flash memory forbidden in this context")); |
| break; |
| |
| case MEM_NONE: |
| return 0; |
| } |
| |
| /* region->hi == 0 means there's no upper bound. */ |
| if (memaddr + len < region->hi || region->hi == 0) |
| *reg_len = len; |
| else |
| *reg_len = region->hi - memaddr; |
| |
| return 1; |
| } |
| |
| /* Read memory from more than one valid target. A core file, for |
| instance, could have some of memory but delegate other bits to |
| the target below it. So, we must manually try all targets. */ |
| |
| enum target_xfer_status |
| raw_memory_xfer_partial (struct target_ops *ops, gdb_byte *readbuf, |
| const gdb_byte *writebuf, ULONGEST memaddr, LONGEST len, |
| ULONGEST *xfered_len) |
| { |
| enum target_xfer_status res; |
| |
| do |
| { |
| res = ops->to_xfer_partial (ops, TARGET_OBJECT_MEMORY, NULL, |
| readbuf, writebuf, memaddr, len, |
| xfered_len); |
| if (res == TARGET_XFER_OK) |
| break; |
| |
| /* Stop if the target reports that the memory is not available. */ |
| if (res == TARGET_XFER_UNAVAILABLE) |
| break; |
| |
| /* We want to continue past core files to executables, but not |
| past a running target's memory. */ |
| if (ops->to_has_all_memory (ops)) |
| break; |
| |
| ops = ops->beneath; |
| } |
| while (ops != NULL); |
| |
| /* The cache works at the raw memory level. Make sure the cache |
| gets updated with raw contents no matter what kind of memory |
| object was originally being written. Note we do write-through |
| first, so that if it fails, we don't write to the cache contents |
| that never made it to the target. */ |
| if (writebuf != NULL |
| && !ptid_equal (inferior_ptid, null_ptid) |
| && target_dcache_init_p () |
| && (stack_cache_enabled_p () || code_cache_enabled_p ())) |
| { |
| DCACHE *dcache = target_dcache_get (); |
| |
| /* Note that writing to an area of memory which wasn't present |
| in the cache doesn't cause it to be loaded in. */ |
| dcache_update (dcache, res, memaddr, writebuf, *xfered_len); |
| } |
| |
| return res; |
| } |
| |
| /* Perform a partial memory transfer. |
| For docs see target.h, to_xfer_partial. */ |
| |
| static enum target_xfer_status |
| memory_xfer_partial_1 (struct target_ops *ops, enum target_object object, |
| gdb_byte *readbuf, const gdb_byte *writebuf, ULONGEST memaddr, |
| ULONGEST len, ULONGEST *xfered_len) |
| { |
| enum target_xfer_status res; |
| ULONGEST reg_len; |
| struct mem_region *region; |
| struct inferior *inf; |
| |
| /* For accesses to unmapped overlay sections, read directly from |
| files. Must do this first, as MEMADDR may need adjustment. */ |
| if (readbuf != NULL && overlay_debugging) |
| { |
| struct obj_section *section = find_pc_overlay (memaddr); |
| |
| if (pc_in_unmapped_range (memaddr, section)) |
| { |
| struct target_section_table *table |
| = target_get_section_table (ops); |
| const char *section_name = section->the_bfd_section->name; |
| |
| memaddr = overlay_mapped_address (memaddr, section); |
| return section_table_xfer_memory_partial (readbuf, writebuf, |
| memaddr, len, xfered_len, |
| table->sections, |
| table->sections_end, |
| section_name); |
| } |
| } |
| |
| /* Try the executable files, if "trust-readonly-sections" is set. */ |
| if (readbuf != NULL && trust_readonly) |
| { |
| struct target_section *secp; |
| struct target_section_table *table; |
| |
| secp = target_section_by_addr (ops, memaddr); |
| if (secp != NULL |
| && (bfd_get_section_flags (secp->the_bfd_section->owner, |
| secp->the_bfd_section) |
| & SEC_READONLY)) |
| { |
| table = target_get_section_table (ops); |
| return section_table_xfer_memory_partial (readbuf, writebuf, |
| memaddr, len, xfered_len, |
| table->sections, |
| table->sections_end, |
| NULL); |
| } |
| } |
| |
| /* Try GDB's internal data cache. */ |
| |
| if (!memory_xfer_check_region (readbuf, writebuf, memaddr, len, ®_len, |
| ®ion)) |
| return TARGET_XFER_E_IO; |
| |
| if (!ptid_equal (inferior_ptid, null_ptid)) |
| inf = find_inferior_ptid (inferior_ptid); |
| else |
| inf = NULL; |
| |
| if (inf != NULL |
| && readbuf != NULL |
| /* The dcache reads whole cache lines; that doesn't play well |
| with reading from a trace buffer, because reading outside of |
| the collected memory range fails. */ |
| && get_traceframe_number () == -1 |
| && (region->attrib.cache |
| || (stack_cache_enabled_p () && object == TARGET_OBJECT_STACK_MEMORY) |
| || (code_cache_enabled_p () && object == TARGET_OBJECT_CODE_MEMORY))) |
| { |
| DCACHE *dcache = target_dcache_get_or_init (); |
| |
| return dcache_read_memory_partial (ops, dcache, memaddr, readbuf, |
| reg_len, xfered_len); |
| } |
| |
| /* If none of those methods found the memory we wanted, fall back |
| to a target partial transfer. Normally a single call to |
| to_xfer_partial is enough; if it doesn't recognize an object |
| it will call the to_xfer_partial of the next target down. |
| But for memory this won't do. Memory is the only target |
| object which can be read from more than one valid target. |
| A core file, for instance, could have some of memory but |
| delegate other bits to the target below it. So, we must |
| manually try all targets. */ |
| |
| res = raw_memory_xfer_partial (ops, readbuf, writebuf, memaddr, reg_len, |
| xfered_len); |
| |
| /* If we still haven't got anything, return the last error. We |
| give up. */ |
| return res; |
| } |
| |
| /* Perform a partial memory transfer. For docs see target.h, |
| to_xfer_partial. */ |
| |
| static enum target_xfer_status |
| memory_xfer_partial (struct target_ops *ops, enum target_object object, |
| gdb_byte *readbuf, const gdb_byte *writebuf, |
| ULONGEST memaddr, ULONGEST len, ULONGEST *xfered_len) |
| { |
| enum target_xfer_status res; |
| |
| /* Zero length requests are ok and require no work. */ |
| if (len == 0) |
| return TARGET_XFER_EOF; |
| |
| /* Fill in READBUF with breakpoint shadows, or WRITEBUF with |
| breakpoint insns, thus hiding out from higher layers whether |
| there are software breakpoints inserted in the code stream. */ |
| if (readbuf != NULL) |
| { |
| res = memory_xfer_partial_1 (ops, object, readbuf, NULL, memaddr, len, |
| xfered_len); |
| |
| if (res == TARGET_XFER_OK && !show_memory_breakpoints) |
| breakpoint_xfer_memory (readbuf, NULL, NULL, memaddr, *xfered_len); |
| } |
| else |
| { |
| gdb_byte *buf; |
| struct cleanup *old_chain; |
| |
| /* A large write request is likely to be partially satisfied |
| by memory_xfer_partial_1. We will continually malloc |
| and free a copy of the entire write request for breakpoint |
| shadow handling even though we only end up writing a small |
| subset of it. Cap writes to 4KB to mitigate this. */ |
| len = min (4096, len); |
| |
| buf = (gdb_byte *) xmalloc (len); |
| old_chain = make_cleanup (xfree, buf); |
| memcpy (buf, writebuf, len); |
| |
| breakpoint_xfer_memory (NULL, buf, writebuf, memaddr, len); |
| res = memory_xfer_partial_1 (ops, object, NULL, buf, memaddr, len, |
| xfered_len); |
| |
| do_cleanups (old_chain); |
| } |
| |
| return res; |
| } |
| |
| static void |
| restore_show_memory_breakpoints (void *arg) |
| { |
| show_memory_breakpoints = (uintptr_t) arg; |
| } |
| |
| struct cleanup * |
| make_show_memory_breakpoints_cleanup (int show) |
| { |
| int current = show_memory_breakpoints; |
| |
| show_memory_breakpoints = show; |
| return make_cleanup (restore_show_memory_breakpoints, |
| (void *) (uintptr_t) current); |
| } |
| |
| /* For docs see target.h, to_xfer_partial. */ |
| |
| enum target_xfer_status |
| target_xfer_partial (struct target_ops *ops, |
| enum target_object object, const char *annex, |
| gdb_byte *readbuf, const gdb_byte *writebuf, |
| ULONGEST offset, ULONGEST len, |
| ULONGEST *xfered_len) |
| { |
| enum target_xfer_status retval; |
| |
| gdb_assert (ops->to_xfer_partial != NULL); |
| |
| /* Transfer is done when LEN is zero. */ |
| if (len == 0) |
| return TARGET_XFER_EOF; |
| |
| if (writebuf && !may_write_memory) |
| error (_("Writing to memory is not allowed (addr %s, len %s)"), |
| core_addr_to_string_nz (offset), plongest (len)); |
| |
| *xfered_len = 0; |
| |
| /* If this is a memory transfer, let the memory-specific code |
| have a look at it instead. Memory transfers are more |
| complicated. */ |
| if (object == TARGET_OBJECT_MEMORY || object == TARGET_OBJECT_STACK_MEMORY |
| || object == TARGET_OBJECT_CODE_MEMORY) |
| retval = memory_xfer_partial (ops, object, readbuf, |
| writebuf, offset, len, xfered_len); |
| else if (object == TARGET_OBJECT_RAW_MEMORY) |
| { |
| /* Skip/avoid accessing the target if the memory region |
| attributes block the access. Check this here instead of in |
| raw_memory_xfer_partial as otherwise we'd end up checking |
| this twice in the case of the memory_xfer_partial path is |
| taken; once before checking the dcache, and another in the |
| tail call to raw_memory_xfer_partial. */ |
| if (!memory_xfer_check_region (readbuf, writebuf, offset, len, &len, |
| NULL)) |
| return TARGET_XFER_E_IO; |
| |
| /* Request the normal memory object from other layers. */ |
| retval = raw_memory_xfer_partial (ops, readbuf, writebuf, offset, len, |
| xfered_len); |
| } |
| else |
| retval = ops->to_xfer_partial (ops, object, annex, readbuf, |
| writebuf, offset, len, xfered_len); |
| |
| if (targetdebug) |
| { |
| const unsigned char *myaddr = NULL; |
| |
| fprintf_unfiltered (gdb_stdlog, |
| "%s:target_xfer_partial " |
| "(%d, %s, %s, %s, %s, %s) = %d, %s", |
| ops->to_shortname, |
| (int) object, |
| (annex ? annex : "(null)"), |
| host_address_to_string (readbuf), |
| host_address_to_string (writebuf), |
| core_addr_to_string_nz (offset), |
| pulongest (len), retval, |
| pulongest (*xfered_len)); |
| |
| if (readbuf) |
| myaddr = readbuf; |
| if (writebuf) |
| myaddr = writebuf; |
| if (retval == TARGET_XFER_OK && myaddr != NULL) |
| { |
| int i; |
| |
| fputs_unfiltered (", bytes =", gdb_stdlog); |
| for (i = 0; i < *xfered_len; i++) |
| { |
| if ((((intptr_t) &(myaddr[i])) & 0xf) == 0) |
| { |
| if (targetdebug < 2 && i > 0) |
| { |
| fprintf_unfiltered (gdb_stdlog, " ..."); |
| break; |
| } |
| fprintf_unfiltered (gdb_stdlog, "\n"); |
| } |
| |
| fprintf_unfiltered (gdb_stdlog, " %02x", myaddr[i] & 0xff); |
| } |
| } |
| |
| fputc_unfiltered ('\n', gdb_stdlog); |
| } |
| |
| /* Check implementations of to_xfer_partial update *XFERED_LEN |
| properly. Do assertion after printing debug messages, so that we |
| can find more clues on assertion failure from debugging messages. */ |
| if (retval == TARGET_XFER_OK || retval == TARGET_XFER_UNAVAILABLE) |
| gdb_assert (*xfered_len > 0); |
| |
| return retval; |
| } |
| |
| /* Read LEN bytes of target memory at address MEMADDR, placing the |
| results in GDB's memory at MYADDR. Returns either 0 for success or |
| -1 if any error occurs. |
| |
| If an error occurs, no guarantee is made about the contents of the data at |
| MYADDR. In particular, the caller should not depend upon partial reads |
| filling the buffer with good data. There is no way for the caller to know |
| how much good data might have been transfered anyway. Callers that can |
| deal with partial reads should call target_read (which will retry until |
| it makes no progress, and then return how much was transferred). */ |
| |
| int |
| target_read_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) |
| { |
| /* Dispatch to the topmost target, not the flattened current_target. |
| Memory accesses check target->to_has_(all_)memory, and the |
| flattened target doesn't inherit those. */ |
| if (target_read (current_target.beneath, TARGET_OBJECT_MEMORY, NULL, |
| myaddr, memaddr, len) == len) |
| return 0; |
| else |
| return -1; |
| } |
| |
| /* See target/target.h. */ |
| |
| int |
| target_read_uint32 (CORE_ADDR memaddr, uint32_t *result) |
| { |
| gdb_byte buf[4]; |
| int r; |
| |
| r = target_read_memory (memaddr, buf, sizeof buf); |
| if (r != 0) |
| return r; |
| *result = extract_unsigned_integer (buf, sizeof buf, |
| gdbarch_byte_order (target_gdbarch ())); |
| return 0; |
| } |
| |
| /* Like target_read_memory, but specify explicitly that this is a read |
| from the target's raw memory. That is, this read bypasses the |
| dcache, breakpoint shadowing, etc. */ |
| |
| int |
| target_read_raw_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) |
| { |
| /* See comment in target_read_memory about why the request starts at |
| current_target.beneath. */ |
| if (target_read (current_target.beneath, TARGET_OBJECT_RAW_MEMORY, NULL, |
| myaddr, memaddr, len) == len) |
| return 0; |
| else |
| return -1; |
| } |
| |
| /* Like target_read_memory, but specify explicitly that this is a read from |
| the target's stack. This may trigger different cache behavior. */ |
| |
| int |
| target_read_stack (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) |
| { |
| /* See comment in target_read_memory about why the request starts at |
| current_target.beneath. */ |
| if (target_read (current_target.beneath, TARGET_OBJECT_STACK_MEMORY, NULL, |
| myaddr, memaddr, len) == len) |
| return 0; |
| else |
| return -1; |
| } |
| |
| /* Like target_read_memory, but specify explicitly that this is a read from |
| the target's code. This may trigger different cache behavior. */ |
| |
| int |
| target_read_code (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len) |
| { |
| /* See comment in target_read_memory about why the request starts at |
| current_target.beneath. */ |
| if (target_read (current_target.beneath, TARGET_OBJECT_CODE_MEMORY, NULL, |
| myaddr, memaddr, len) == len) |
| return 0; |
| else |
| return -1; |
| } |
| |
| /* Write LEN bytes from MYADDR to target memory at address MEMADDR. |
| Returns either 0 for success or -1 if any error occurs. If an |
| error occurs, no guarantee is made about how much data got written. |
| Callers that can deal with partial writes should call |
| target_write. */ |
| |
| int |
| target_write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, ssize_t len) |
| { |
| /* See comment in target_read_memory about why the request starts at |
| current_target.beneath. */ |
| if (target_write (current_target.beneath, TARGET_OBJECT_MEMORY, NULL, |
| myaddr, memaddr, len) == len) |
| return 0; |
| else |
| return -1; |
| } |
| |
| /* Write LEN bytes from MYADDR to target raw memory at address |
| MEMADDR. Returns either 0 for success or -1 if any error occurs. |
| If an error occurs, no guarantee is made about how much data got |
| written. Callers that can deal with partial writes should call |
| target_write. */ |
| |
| int |
| target_write_raw_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, ssize_t len) |
| { |
| /* See comment in target_read_memory about why the request starts at |
| current_target.beneath. */ |
| if (target_write (current_target.beneath, TARGET_OBJECT_RAW_MEMORY, NULL, |
| myaddr, memaddr, len) == len) |
| return 0; |
| else |
| return -1; |
| } |
| |
| /* Fetch the target's memory map. */ |
| |
| VEC(mem_region_s) * |
| target_memory_map (void) |
| { |
| VEC(mem_region_s) *result; |
| struct mem_region *last_one, *this_one; |
| int ix; |
| struct target_ops *t; |
| |
| result = current_target.to_memory_map (¤t_target); |
| if (result == NULL) |
| return NULL; |
| |
| qsort (VEC_address (mem_region_s, result), |
| VEC_length (mem_region_s, result), |
| sizeof (struct mem_region), mem_region_cmp); |
| |
| /* Check that regions do not overlap. Simultaneously assign |
| a numbering for the "mem" commands to use to refer to |
| each region. */ |
| last_one = NULL; |
| for (ix = 0; VEC_iterate (mem_region_s, result, ix, this_one); ix++) |
| { |
| this_one->number = ix; |
| |
| if (last_one && last_one->hi > this_one->lo) |
| { |
| warning (_("Overlapping regions in memory map: ignoring")); |
| VEC_free (mem_region_s, result); |
| return NULL; |
| } |
| last_one = this_one; |
| } |
| |
| return result; |
| } |
| |
| void |
| target_flash_erase (ULONGEST address, LONGEST length) |
| { |
| current_target.to_flash_erase (¤t_target, address, length); |
| } |
| |
| void |
| target_flash_done (void) |
| { |
| current_target.to_flash_done (¤t_target); |
| } |
| |
| static void |
| show_trust_readonly (struct ui_file *file, int from_tty, |
| struct cmd_list_element *c, const char *value) |
| { |
| fprintf_filtered (file, |
| _("Mode for reading from readonly sections is %s.\n"), |
| value); |
| } |
| |
| /* Target vector read/write partial wrapper functions. */ |
| |
| static enum target_xfer_status |
| target_read_partial (struct target_ops *ops, |
| enum target_object object, |
| const char *annex, gdb_byte *buf, |
| ULONGEST offset, ULONGEST len, |
| ULONGEST *xfered_len) |
| { |
| return target_xfer_partial (ops, object, annex, buf, NULL, offset, len, |
| xfered_len); |
| } |
| |
| static enum target_xfer_status |
| target_write_partial (struct target_ops *ops, |
| enum target_object object, |
| const char *annex, const gdb_byte *buf, |
| ULONGEST offset, LONGEST len, ULONGEST *xfered_len) |
| { |
| return target_xfer_partial (ops, object, annex, NULL, buf, offset, len, |
| xfered_len); |
| } |
| |
| /* Wrappers to perform the full transfer. */ |
| |
| /* For docs on target_read see target.h. */ |
| |
| LONGEST |
| target_read (struct target_ops *ops, |
| enum target_object object, |
| const char *annex, gdb_byte *buf, |
| ULONGEST offset, LONGEST len) |
| { |
| LONGEST xfered_total = 0; |
| int unit_size = 1; |
| |
| /* If we are reading from a memory object, find the length of an addressable |
| unit for that architecture. */ |
| if (object == TARGET_OBJECT_MEMORY |
| || object == TARGET_OBJECT_STACK_MEMORY |
| || object == TARGET_OBJECT_CODE_MEMORY |
| || object == TARGET_OBJECT_RAW_MEMORY) |
| unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ()); |
| |
| while (xfered_total < len) |
| { |
| ULONGEST xfered_partial; |
| enum target_xfer_status status; |
| |
| status = target_read_partial (ops, object, annex, |
| buf + xfered_total * unit_size, |
| offset + xfered_total, len - xfered_total, |
| &xfered_partial); |
| |
| /* Call an observer, notifying them of the xfer progress? */ |
| if (status == TARGET_XFER_EOF) |
| return xfered_total; |
| else if (status == TARGET_XFER_OK) |
| { |
| xfered_total += xfered_partial; |
| QUIT; |
| } |
| else |
| return TARGET_XFER_E_IO; |
| |
| } |
| return len; |
| } |
| |
| /* Assuming that the entire [begin, end) range of memory cannot be |
| read, try to read whatever subrange is possible to read. |
| |
| The function returns, in RESULT, either zero or one memory block. |
| If there's a readable subrange at the beginning, it is completely |
| read and returned. Any further readable subrange will not be read. |
| Otherwise, if there's a readable subrange at the end, it will be |
| completely read and returned. Any readable subranges before it |
| (obviously, not starting at the beginning), will be ignored. In |
| other cases -- either no readable subrange, or readable subrange(s) |
| that is neither at the beginning, or end, nothing is returned. |
| |
| The purpose of this function is to handle a read across a boundary |
| of accessible memory in a case when memory map is not available. |
| The above restrictions are fine for this case, but will give |
| incorrect results if the memory is 'patchy'. However, supporting |
| 'patchy' memory would require trying to read every single byte, |
| and it seems unacceptable solution. Explicit memory map is |
| recommended for this case -- and target_read_memory_robust will |
| take care of reading multiple ranges then. */ |
| |
| static void |
| read_whatever_is_readable (struct target_ops *ops, |
| const ULONGEST begin, const ULONGEST end, |
| int unit_size, |
| VEC(memory_read_result_s) **result) |
| { |
| gdb_byte *buf = (gdb_byte *) xmalloc (end - begin); |
| ULONGEST current_begin = begin; |
| ULONGEST current_end = end; |
| int forward; |
| memory_read_result_s r; |
| ULONGEST xfered_len; |
| |
| /* If we previously failed to read 1 byte, nothing can be done here. */ |
| if (end - begin <= 1) |
| { |
| xfree (buf); |
| return; |
| } |
| |
| /* Check that either first or the last byte is readable, and give up |
| if not. This heuristic is meant to permit reading accessible memory |
| at the boundary of accessible region. */ |
| if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL, |
| buf, begin, 1, &xfered_len) == TARGET_XFER_OK) |
| { |
| forward = 1; |
| ++current_begin; |
| } |
| else if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL, |
| buf + (end - begin) - 1, end - 1, 1, |
| &xfered_len) == TARGET_XFER_OK) |
| { |
| forward = 0; |
| --current_end; |
| } |
| else |
| { |
| xfree (buf); |
| return; |
| } |
| |
| /* Loop invariant is that the [current_begin, current_end) was previously |
| found to be not readable as a whole. |
| |
| Note loop condition -- if the range has 1 byte, we can't divide the range |
| so there's no point trying further. */ |
| while (current_end - current_begin > 1) |
| { |
| ULONGEST first_half_begin, first_half_end; |
| ULONGEST second_half_begin, second_half_end; |
| LONGEST xfer; |
| ULONGEST middle = current_begin + (current_end - current_begin) / 2; |
| |
| if (forward) |
| { |
| first_half_begin = current_begin; |
| first_half_end = middle; |
| second_half_begin = middle; |
| second_half_end = current_end; |
| } |
| else |
| { |
| first_half_begin = middle; |
| first_half_end = current_end; |
| second_half_begin = current_begin; |
| second_half_end = middle; |
| } |
| |
| xfer = target_read (ops, TARGET_OBJECT_MEMORY, NULL, |
| buf + (first_half_begin - begin) * unit_size, |
| first_half_begin, |
| first_half_end - first_half_begin); |
| |
| if (xfer == first_half_end - first_half_begin) |
| { |
| /* This half reads up fine. So, the error must be in the |
| other half. */ |
| current_begin = second_half_begin; |
| current_end = second_half_end; |
| } |
| else |
| { |
| /* This half is not readable. Because we've tried one byte, we |
| know some part of this half if actually readable. Go to the next |
| iteration to divide again and try to read. |
| |
| We don't handle the other half, because this function only tries |
| to read a single readable subrange. */ |
| current_begin = first_half_begin; |
| current_end = first_half_end; |
| } |
| } |
| |
| if (forward) |
| { |
| /* The [begin, current_begin) range has been read. */ |
| r.begin = begin; |
| r.end = current_begin; |
| r.data = buf; |
| } |
| else |
| { |
| /* The [current_end, end) range has been read. */ |
| LONGEST region_len = end - current_end; |
| |
| r.data = (gdb_byte *) xmalloc (region_len * unit_size); |
| memcpy (r.data, buf + (current_end - begin) * unit_size, |
| region_len * unit_size); |
| r.begin = current_end; |
| r.end = end; |
| xfree (buf); |
| } |
| VEC_safe_push(memory_read_result_s, (*result), &r); |
| } |
| |
| void |
| free_memory_read_result_vector (void *x) |
| { |
| VEC(memory_read_result_s) *v = (VEC(memory_read_result_s) *) x; |
| memory_read_result_s *current; |
| int ix; |
| |
| for (ix = 0; VEC_iterate (memory_read_result_s, v, ix, current); ++ix) |
| { |
| xfree (current->data); |
| } |
| VEC_free (memory_read_result_s, v); |
| } |
| |
| VEC(memory_read_result_s) * |
| read_memory_robust (struct target_ops *ops, |
| const ULONGEST offset, const LONGEST len) |
| { |
| VEC(memory_read_result_s) *result = 0; |
| int unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ()); |
| |
| LONGEST xfered_total = 0; |
| while (xfered_total < len) |
| { |
| struct mem_region *region = lookup_mem_region (offset + xfered_total); |
| LONGEST region_len; |
| |
| /* If there is no explicit region, a fake one should be created. */ |
| gdb_assert (region); |
| |
| if (region->hi == 0) |
| region_len = len - xfered_total; |
| else |
| region_len = region->hi - offset; |
| |
| if (region->attrib.mode == MEM_NONE || region->attrib.mode == MEM_WO) |
| { |
| /* Cannot read this region. Note that we can end up here only |
| if the region is explicitly marked inaccessible, or |
| 'inaccessible-by-default' is in effect. */ |
| xfered_total += region_len; |
| } |
| else |
| { |
| LONGEST to_read = min (len - xfered_total, region_len); |
| gdb_byte *buffer = (gdb_byte *) xmalloc (to_read * unit_size); |
| |
| LONGEST xfered_partial = |
| target_read (ops, TARGET_OBJECT_MEMORY, NULL, |
| (gdb_byte *) buffer, |
| offset + xfered_total, to_read); |
| /* Call an observer, notifying them of the xfer progress? */ |
| if (xfered_partial <= 0) |
| { |
| /* Got an error reading full chunk. See if maybe we can read |
| some subrange. */ |
| xfree (buffer); |
| read_whatever_is_readable (ops, offset + xfered_total, |
| offset + xfered_total + to_read, |
| unit_size, &result); |
| xfered_total += to_read; |
| } |
| else |
| { |
| struct memory_read_result r; |
| r.data = buffer; |
| r.begin = offset + xfered_total; |
| r.end = r.begin + xfered_partial; |
| VEC_safe_push (memory_read_result_s, result, &r); |
| xfered_total += xfered_partial; |
| } |
| QUIT; |
| } |
| } |
| return result; |
| } |
| |
| |
| /* An alternative to target_write with progress callbacks. */ |
| |
| LONGEST |
| target_write_with_progress (struct target_ops *ops, |
| enum target_object object, |
| const char *annex, const gdb_byte *buf, |
| ULONGEST offset, LONGEST len, |
| void (*progress) (ULONGEST, void *), void *baton) |
| { |
| LONGEST xfered_total = 0; |
| int unit_size = 1; |
| |
| /* If we are writing to a memory object, find the length of an addressable |
| unit for that architecture. */ |
| if (object == TARGET_OBJECT_MEMORY |
| || object == TARGET_OBJECT_STACK_MEMORY |
| || object == TARGET_OBJECT_CODE_MEMORY |
| || object == TARGET_OBJECT_RAW_MEMORY) |
| unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ()); |
| |
| /* Give the progress callback a chance to set up. */ |
| if (progress) |
| (*progress) (0, baton); |
| |
| while (xfered_total < len) |
| { |
| ULONGEST xfered_partial; |
| enum target_xfer_status status; |
| |
| status = target_write_partial (ops, object, annex, |
| buf + xfered_total * unit_size, |
| offset + xfered_total, len - xfered_total, |
| &xfered_partial); |
| |
| if (status != TARGET_XFER_OK) |
| return status == TARGET_XFER_EOF ? xfered_total : TARGET_XFER_E_IO; |
| |
| if (progress) |
| (*progress) (xfered_partial, baton); |
| |
| xfered_total += xfered_partial; |
| QUIT; |
| } |
| return len; |
| } |
| |
| /* For docs on target_write see target.h. */ |
| |
| LONGEST |
| target_write (struct target_ops *ops, |
| enum target_object object, |
| const char *annex, const gdb_byte *buf, |
| ULONGEST offset, LONGEST len) |
| { |
| return target_write_with_progress (ops, object, annex, buf, offset, len, |
| NULL, NULL); |
| } |
| |
| /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return |
| the size of the transferred data. PADDING additional bytes are |
| available in *BUF_P. This is a helper function for |
| target_read_alloc; see the declaration of that function for more |
| information. */ |
| |
| static LONGEST |
| target_read_alloc_1 (struct target_ops *ops, enum target_object object, |
| const char *annex, gdb_byte **buf_p, int padding) |
| { |
| size_t buf_alloc, buf_pos; |
| gdb_byte *buf; |
| |
| /* This function does not have a length parameter; it reads the |
| entire OBJECT). Also, it doesn't support objects fetched partly |
| from one target and partly from another (in a different stratum, |
| e.g. a core file and an executable). Both reasons make it |
| unsuitable for reading memory. */ |
| gdb_assert (object != TARGET_OBJECT_MEMORY); |
| |
| /* Start by reading up to 4K at a time. The target will throttle |
| this number down if necessary. */ |
| buf_alloc = 4096; |
| buf = (gdb_byte *) xmalloc (buf_alloc); |
| buf_pos = 0; |
| while (1) |
| { |
| ULONGEST xfered_len; |
| enum target_xfer_status status; |
| |
| status = target_read_partial (ops, object, annex, &buf[buf_pos], |
| buf_pos, buf_alloc - buf_pos - padding, |
| &xfered_len); |
| |
| if (status == TARGET_XFER_EOF) |
| { |
| /* Read all there was. */ |
| if (buf_pos == 0) |
| xfree (buf); |
| else |
| *buf_p = buf; |
| return buf_pos; |
| } |
| else if (status != TARGET_XFER_OK) |
| { |
| /* An error occurred. */ |
| xfree (buf); |
| return TARGET_XFER_E_IO; |
| } |
| |
| buf_pos += xfered_len; |
| |
| /* If the buffer is filling up, expand it. */ |
| if (buf_alloc < buf_pos * 2) |
| { |
| buf_alloc *= 2; |
| buf = (gdb_byte *) xrealloc (buf, buf_alloc); |
| } |
| |
| QUIT; |
| } |
| } |
| |
| /* Read OBJECT/ANNEX using OPS. Store the result in *BUF_P and return |
| the size of the transferred data. See the declaration in "target.h" |
| function for more information about the return value. */ |
| |
| LONGEST |
| target_read_alloc (struct target_ops *ops, enum target_object object, |
| const char *annex, gdb_byte **buf_p) |
| { |
| return target_read_alloc_1 (ops, object, annex, buf_p, 0); |
| } |
| |
| /* Read OBJECT/ANNEX using OPS. The result is NUL-terminated and |
| returned as a string, allocated using xmalloc. If an error occurs |
| or the transfer is unsupported, NULL is returned. Empty objects |
| are returned as allocated but empty strings. A warning is issued |
| if the result contains any embedded NUL bytes. */ |
| |
| char * |
| target_read_stralloc (struct target_ops *ops, enum target_object object, |
| const char *annex) |
| { |
| gdb_byte *buffer; |
| char *bufstr; |
| LONGEST i, transferred; |
| |
| transferred = target_read_alloc_1 (ops, object, annex, &buffer, 1); |
| bufstr = (char *) buffer; |
| |
| if (transferred < 0) |
| return NULL; |
| |
| if (transferred == 0) |
| return xstrdup (""); |
| |
| bufstr[transferred] = 0; |
| |
| /* Check for embedded NUL bytes; but allow trailing NULs. */ |
| for (i = strlen (bufstr); i < transferred; i++) |
| if (bufstr[i] != 0) |
| { |
| warning (_("target object %d, annex %s, " |
| "contained unexpected null characters"), |
| (int) object, annex ? annex : "(none)"); |
| break; |
| } |
| |
| return bufstr; |
| } |
| |
| /* Memory transfer methods. */ |
| |
| void |
| get_target_memory (struct target_ops *ops, CORE_ADDR addr, gdb_byte *buf, |
| LONGEST len) |
| { |
| /* This method is used to read from an alternate, non-current |
| target. This read must bypass the overlay support (as symbols |
| don't match this target), and GDB's internal cache (wrong cache |
| for this target). */ |
| if (target_read (ops, TARGET_OBJECT_RAW_MEMORY, NULL, buf, addr, len) |
| != len) |
| memory_error (TARGET_XFER_E_IO, addr); |
| } |
| |
| ULONGEST |
| get_target_memory_unsigned (struct target_ops *ops, CORE_ADDR addr, |
| int len, enum bfd_endian byte_order) |
| { |
| gdb_byte buf[sizeof (ULONGEST)]; |
| |
| gdb_assert (len <= sizeof (buf)); |
| get_target_memory (ops, addr, buf, len); |
| return extract_unsigned_integer (buf, len, byte_order); |
| } |
| |
| /* See target.h. */ |
| |
| int |
| target_insert_breakpoint (struct gdbarch *gdbarch, |
| struct bp_target_info *bp_tgt) |
| { |
| if (!may_insert_breakpoints) |
| { |
| warning (_("May not insert breakpoints")); |
| return 1; |
| } |
| |
| return current_target.to_insert_breakpoint (¤t_target, |
| gdbarch, bp_tgt); |
| } |
| |
| /* See target.h. */ |
| |
| int |
| target_remove_breakpoint (struct gdbarch *gdbarch, |
| struct bp_target_info *bp_tgt) |
| { |
| /* This is kind of a weird case to handle, but the permission might |
| have been changed after breakpoints were inserted - in which case |
| we should just take the user literally and assume that any |
| breakpoints should be left in place. */ |
| if (!may_insert_breakpoints) |
| { |
| warning (_("May not remove breakpoints")); |
| return 1; |
| } |
| |
| return current_target.to_remove_breakpoint (¤t_target, |
| gdbarch, bp_tgt); |
| } |
| |
| static void |
| target_info (char *args, int from_tty) |
| { |
| struct target_ops *t; |
| int has_all_mem = 0; |
| |
| if (symfile_objfile != NULL) |
| printf_unfiltered (_("Symbols from \"%s\".\n"), |
| objfile_name (symfile_objfile)); |
| |
| for (t = target_stack; t != NULL; t = t->beneath) |
| { |
| if (!(*t->to_has_memory) (t)) |
| continue; |
| |
| if ((int) (t->to_stratum) <= (int) dummy_stratum) |
| continue; |
| if (has_all_mem) |
| printf_unfiltered (_("\tWhile running this, " |
| "GDB does not access memory from...\n")); |
| printf_unfiltered ("%s:\n", t->to_longname); |
| (t->to_files_info) (t); |
| has_all_mem = (*t->to_has_all_memory) (t); |
| } |
| } |
| |
| /* This function is called before any new inferior is created, e.g. |
| by running a program, attaching, or connecting to a target. |
| It cleans up any state from previous invocations which might |
| change between runs. This is a subset of what target_preopen |
| resets (things which might change between targets). */ |
| |
| void |
| target_pre_inferior (int from_tty) |
| { |
| /* Clear out solib state. Otherwise the solib state of the previous |
| inferior might have survived and is entirely wrong for the new |
| target. This has been observed on GNU/Linux using glibc 2.3. How |
| to reproduce: |
| |
| bash$ ./foo& |
| [1] 4711 |
| bash$ ./foo& |
| [1] 4712 |
| bash$ gdb ./foo |
| [...] |
| (gdb) attach 4711 |
| (gdb) detach |
| (gdb) attach 4712 |
| Cannot access memory at address 0xdeadbeef |
| */ |
| |
| /* In some OSs, the shared library list is the same/global/shared |
| across inferiors. If code is shared between processes, so are |
| memory regions and features. */ |
| if (!gdbarch_has_global_solist (target_gdbarch ())) |
| { |
| no_shared_libraries (NULL, from_tty); |
| |
| invalidate_target_mem_regions (); |
| |
| target_clear_description (); |
| } |
| |
| /* attach_flag may be set if the previous process associated with |
| the inferior was attached to. */ |
| current_inferior ()->attach_flag = 0; |
| |
| current_inferior ()->highest_thread_num = 0; |
| |
| agent_capability_invalidate (); |
| } |
| |
| /* Callback for iterate_over_inferiors. Gets rid of the given |
| inferior. */ |
| |
| static int |
| dispose_inferior (struct inferior *inf, void *args) |
| { |
| struct thread_info *thread; |
| |
| thread = any_thread_of_process (inf->pid); |
| if (thread) |
| { |
| switch_to_thread (thread->ptid); |
| |
| /* Core inferiors actually should be detached, not killed. */ |
| if (target_has_execution) |
| target_kill (); |
| else |
| target_detach (NULL, 0); |
| } |
| |
| return 0; |
| } |
| |
| /* This is to be called by the open routine before it does |
| anything. */ |
| |
| void |
| target_preopen (int from_tty) |
| { |
| dont_repeat (); |
| |
| if (have_inferiors ()) |
| { |
| if (!from_tty |
| || !have_live_inferiors () |
| || query (_("A program is being debugged already. Kill it? "))) |
| iterate_over_inferiors (dispose_inferior, NULL); |
| else |
| error (_("Program not killed.")); |
| } |
| |
| /* Calling target_kill may remove the target from the stack. But if |
| it doesn't (which seems like a win for UDI), remove it now. */ |
| /* Leave the exec target, though. The user may be switching from a |
| live process to a core of the same program. */ |
| pop_all_targets_above (file_stratum); |
| |
| target_pre_inferior (from_tty); |
| } |
| |
| /* Detach a target after doing deferred register stores. */ |
| |
| void |
| target_detach (const char *args, int from_tty) |
| { |
| struct target_ops* t; |
| |
| if (gdbarch_has_global_breakpoints (target_gdbarch ())) |
| /* Don't remove global breakpoints here. They're removed on |
| disconnection from the target. */ |
| ; |
| else |
| /* If we're in breakpoints-always-inserted mode, have to remove |
| them before detaching. */ |
| remove_breakpoints_pid (ptid_get_pid (inferior_ptid)); |
| |
| prepare_for_detach (); |
| |
| current_target.to_detach (¤t_target, args, from_tty); |
| } |
| |
| void |
| target_disconnect (const char *args, int from_tty) |
| { |
| /* If we're in breakpoints-always-inserted mode or if breakpoints |
| are global across processes, we have to remove them before |
| disconnecting. */ |
| remove_breakpoints (); |
| |
| current_target.to_disconnect (¤t_target, args, from_tty); |
| } |
| |
| ptid_t |
| target_wait (ptid_t ptid, struct target_waitstatus *status, int options) |
| { |
| return (current_target.to_wait) (¤t_target, ptid, status, options); |
| } |
| |
| /* See target.h. */ |
| |
| ptid_t |
| default_target_wait (struct target_ops *ops, |
| ptid_t ptid, struct target_waitstatus *status, |
| int options) |
| { |
| status->kind = TARGET_WAITKIND_IGNORE; |
| return minus_one_ptid; |
| } |
| |
| char * |
| target_pid_to_str (ptid_t ptid) |
| { |
| return (*current_target.to_pid_to_str) (¤t_target, ptid); |
| } |
| |
| const char * |
| target_thread_name (struct thread_info *info) |
| { |
| return current_target.to_thread_name (¤t_target, info); |
| } |
| |
| void |
| target_resume (ptid_t ptid, int step, enum gdb_signal signal) |
| { |
| struct target_ops *t; |
| |
| target_dcache_invalidate (); |
| |
| current_target.to_resume (¤t_target, ptid, step, signal); |
| |
| registers_changed_ptid (ptid); |
| /* We only set the internal executing state here. The user/frontend |
| running state is set at a higher level. */ |
| set_executing (ptid, 1); |
| clear_inline_frame_state (ptid); |
| } |
| |
| void |
| target_pass_signals (int numsigs, unsigned char *pass_signals) |
| { |
| (*current_target.to_pass_signals) (¤t_target, numsigs, pass_signals); |
| } |
| |
| void |
| target_program_signals (int numsigs, unsigned char *program_signals) |
| { |
| (*current_target.to_program_signals) (¤t_target, |
| numsigs, program_signals); |
| } |
| |
| static int |
| default_follow_fork (struct target_ops *self, int follow_child, |
| int detach_fork) |
| { |
| /* Some target returned a fork event, but did not know how to follow it. */ |
| internal_error (__FILE__, __LINE__, |
| _("could not find a target to follow fork")); |
| } |
| |
| /* Look through the list of possible targets for a target that can |
| follow forks. */ |
| |
| int |
| target_follow_fork (int follow_child, int detach_fork) |
| { |
| return current_target.to_follow_fork (¤t_target, |
| follow_child, detach_fork); |
| } |
| |
| /* Target wrapper for follow exec hook. */ |
| |
| void |
| target_follow_exec (struct inferior *inf, char *execd_pathname) |
| { |
| current_target.to_follow_exec (¤t_target, inf, execd_pathname); |
| } |
| |
| static void |
| default_mourn_inferior (struct target_ops *self) |
| { |
| internal_error (__FILE__, __LINE__, |
| _("could not find a target to follow mourn inferior")); |
| } |
| |
| void |
| target_mourn_inferior (void) |
| { |
| current_target.to_mourn_inferior (¤t_target); |
| |
| /* We no longer need to keep handles on any of the object files. |
| Make sure to release them to avoid unnecessarily locking any |
| of them while we're not actually debugging. */ |
| bfd_cache_close_all (); |
| } |
| |
| /* Look for a target which can describe architectural features, starting |
| from TARGET. If we find one, return its description. */ |
| |
| const struct target_desc * |
| target_read_description (struct target_ops *target) |
| { |
| return target->to_read_description (target); |
| } |
| |
| /* This implements a basic search of memory, reading target memory and |
| performing the search here (as opposed to performing the search in on the |
| target side with, for example, gdbserver). */ |
| |
| int |
| simple_search_memory (struct target_ops *ops, |
| CORE_ADDR start_addr, ULONGEST search_space_len, |
| const gdb_byte *pattern, ULONGEST pattern_len, |
| CORE_ADDR *found_addrp) |
| { |
| /* NOTE: also defined in find.c testcase. */ |
| #define SEARCH_CHUNK_SIZE 16000 |
| const unsigned chunk_size = SEARCH_CHUNK_SIZE; |
| /* Buffer to hold memory contents for searching. */ |
| gdb_byte *search_buf; |
| unsigned search_buf_size; |
| struct cleanup *old_cleanups; |
| |
| search_buf_size = chunk_size + pattern_len - 1; |
| |
| /* No point in trying to allocate a buffer larger than the search space. */ |
| if (search_space_len < search_buf_size) |
| search_buf_size = search_space_len; |
| |
| search_buf = (gdb_byte *) malloc (search_buf_size); |
| if (search_buf == NULL) |
| error (_("Unable to allocate memory to perform the search.")); |
| old_cleanups = make_cleanup (free_current_contents, &search_buf); |
| |
| /* Prime the search buffer. */ |
| |
| if (target_read (ops, TARGET_OBJECT_MEMORY, NULL, |
| search_buf, start_addr, search_buf_size) != search_buf_size) |
| { |
| warning (_("Unable to access %s bytes of target " |
| "memory at %s, halting search."), |
| pulongest (search_buf_size), hex_string (start_addr)); |
| do_cleanups (old_cleanups); |
| return -1; |
| } |
| |
| /* Perform the search. |
| |
| The loop is kept simple by allocating [N + pattern-length - 1] bytes. |
| When we've scanned N bytes we copy the trailing bytes to the start and |
| read in another N bytes. */ |
| |
| while (search_space_len >= pattern_len) |
| { |
| gdb_byte *found_ptr; |
| unsigned nr_search_bytes = min (search_space_len, search_buf_size); |
| |
| found_ptr = (gdb_byte *) memmem (search_buf, nr_search_bytes, |
| pattern, pattern_len); |
| |
| if (found_ptr != NULL) |
| { |
| CORE_ADDR found_addr = start_addr + (found_ptr - search_buf); |
| |
| *found_addrp = found_addr; |
| do_cleanups (old_cleanups); |
| return 1; |
| } |
| |
| /* Not found in this chunk, skip to next chunk. */ |
| |
| /* Don't let search_space_len wrap here, it's unsigned. */ |
| if (search_space_len >= chunk_size) |
| search_space_len -= chunk_size; |
| else |
| search_space_len = 0; |
| |
| if (search_space_len >= pattern_len) |
| { |
| unsigned keep_len = search_buf_size - chunk_size; |
| CORE_ADDR read_addr = start_addr + chunk_size + keep_len; |
| int nr_to_read; |
| |
| /* Copy the trailing part of the previous iteration to the front |
| of the buffer for the next iteration. */ |
| gdb_assert (keep_len == pattern_len - 1); |
| memcpy (search_buf, search_buf + chunk_size, keep_len); |
| |
| nr_to_read = min (search_space_len - keep_len, chunk_size); |
| |
| if (target_read (ops, TARGET_OBJECT_MEMORY, NULL, |
| search_buf + keep_len, read_addr, |
| nr_to_read) != nr_to_read) |
| { |
| warning (_("Unable to access %s bytes of target " |
| "memory at %s, halting search."), |
| plongest (nr_to_read), |
| hex_string (read_addr)); |
| do_cleanups (old_cleanups); |
| return -1; |
| } |
| |
| start_addr += chunk_size; |
| } |
| } |
| |
| /* Not found. */ |
| |
| do_cleanups (old_cleanups); |
| return 0; |
| } |
| |
| /* Default implementation of memory-searching. */ |
| |
| static int |
| default_search_memory (struct target_ops *self, |
| CORE_ADDR start_addr, ULONGEST search_space_len, |
| const gdb_byte *pattern, ULONGEST pattern_len, |
| CORE_ADDR *found_addrp) |
| { |
| /* Start over from the top of the target stack. */ |
| return simple_search_memory (current_target.beneath, |
| start_addr, search_space_len, |
| pattern, pattern_len, found_addrp); |
| } |
| |
| /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the |
| sequence of bytes in PATTERN with length PATTERN_LEN. |
| |
| The result is 1 if found, 0 if not found, and -1 if there was an error |
| requiring halting of the search (e.g. memory read error). |
| If the pattern is found the address is recorded in FOUND_ADDRP. */ |
| |
| int |
| target_search_memory (CORE_ADDR start_addr, ULONGEST search_space_len, |
| const gdb_byte *pattern, ULONGEST pattern_len, |
| CORE_ADDR *found_addrp) |
| { |
| return current_target.to_search_memory (¤t_target, start_addr, |
| search_space_len, |
| pattern, pattern_len, found_addrp); |
| } |
| |
| /* Look through the currently pushed targets. If none of them will |
| be able to restart the currently running process, issue an error |
| message. */ |
| |
| void |
| target_require_runnable (void) |
| { |
| struct target_ops *t; |
| |
| for (t = target_stack; t != NULL; t = t->beneath) |
| { |
| /* If this target knows how to create a new program, then |
| assume we will still be able to after killing the current |
| one. Either killing and mourning will not pop T, or else |
| find_default_run_target will find it again. */ |
| if (t->to_create_inferior != NULL) |
| return; |
| |
| /* Do not worry about targets at certain strata that can not |
| create inferiors. Assume they will be pushed again if |
| necessary, and continue to the process_stratum. */ |
| if (t->to_stratum == thread_stratum |
| || t->to_stratum == record_stratum |
| || t->to_stratum == arch_stratum) |
| continue; |
| |
| error (_("The \"%s\" target does not support \"run\". " |
| "Try \"help target\" or \"continue\"."), |
| t->to_shortname); |
| } |
| |
| /* This function is only called if the target is running. In that |
| case there should have been a process_stratum target and it |
| should either know how to create inferiors, or not... */ |
| internal_error (__FILE__, __LINE__, _("No targets found")); |
| } |
| |
| /* Whether GDB is allowed to fall back to the default run target for |
| "run", "attach", etc. when no target is connected yet. */ |
| static int auto_connect_native_target = 1; |
| |
| static void |
| show_auto_connect_native_target (struct ui_file *file, int from_tty, |
| struct cmd_list_element *c, const char *value) |
| { |
| fprintf_filtered (file, |
| _("Whether GDB may automatically connect to the " |
| "native target is %s.\n"), |
| value); |
| } |
| |
| /* Look through the list of possible targets for a target that can |
| execute a run or attach command without any other data. This is |
| used to locate the default process stratum. |
| |
| If DO_MESG is not NULL, the result is always valid (error() is |
| called for errors); else, return NULL on error. */ |
| |
| static struct target_ops * |
| find_default_run_target (char *do_mesg) |
| { |
| struct target_ops *runable = NULL; |
| |
| if (auto_connect_native_target) |
| { |
| struct target_ops *t; |
| int count = 0; |
| int i; |
| |
| for (i = 0; VEC_iterate (target_ops_p, target_structs, i, t); ++i) |
| { |
| if (t->to_can_run != delegate_can_run && target_can_run (t)) |
| { |
| runable = t; |
| ++count; |
| } |
| } |
| |
| if (count != 1) |
| runable = NULL; |
| } |
| |
| if (runable == NULL) |
| { |
| if (do_mesg) |
| error (_("Don't know how to %s. Try \"help target\"."), do_mesg); |
| else |
| return NULL; |
| } |
| |
| return runable; |
| } |
| |
| /* See target.h. */ |
| |
| struct target_ops * |
| find_attach_target (void) |
| { |
| struct target_ops *t; |
| |
| /* If a target on the current stack can attach, use it. */ |
| for (t = current_target.beneath; t != NULL; t = t->beneath) |
| { |
| if (t->to_attach != NULL) |
| break; |
| } |
| |
| /* Otherwise, use the default run target for attaching. */ |
| if (t == NULL) |
| t = find_default_run_target ("attach"); |
| |
| return t; |
| } |
| |
| /* See target.h. */ |
| |
| struct target_ops * |
| find_run_target (void) |
| { |
| struct target_ops *t; |
| |
| /* If a target on the current stack can attach, use it. */ |
| for (t = current_target.beneath; t != NULL; t = t->beneath) |
| { |
| if (t->to_create_inferior != NULL) |
| break; |
| } |
| |
| /* Otherwise, use the default run target. */ |
| if (t == NULL) |
| t = find_default_run_target ("run"); |
| |
| return t; |
| } |
| |
| /* Implement the "info proc" command. */ |
| |
| int |
| target_info_proc (const char *args, enum info_proc_what what) |
| { |
| struct target_ops *t; |
| |
| /* If we're already connected to something that can get us OS |
| related data, use it. Otherwise, try using the native |
| target. */ |
| if (current_target.to_stratum >= process_stratum) |
| t = current_target.beneath; |
| else |
| t = find_default_run_target (NULL); |
| |
| for (; t != NULL; t = t->beneath) |
| { |
| if (t->to_info_proc != NULL) |
| { |
| t->to_info_proc (t, args, what); |
| |
| if (targetdebug) |
| fprintf_unfiltered (gdb_stdlog, |
| "target_info_proc (\"%s\", %d)\n", args, what); |
| |
| return 1; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int |
| find_default_supports_disable_randomization (struct target_ops *self) |
| { |
| struct target_ops *t; |
| |
| t = find_default_run_target (NULL); |
| if (t && t->to_supports_disable_randomization) |
| return (t->to_supports_disable_randomization) (t); |
| return 0; |
| } |
| |
| int |
| target_supports_disable_randomization (void) |
| { |
| struct target_ops *t; |
| |
| for (t = ¤t_target; t != NULL; t = t->beneath) |
| if (t->to_supports_disable_randomization) |
| return t->to_supports_disable_randomization (t); |
| |
| return 0; |
| } |
| |
| char * |
| target_get_osdata (const char *type) |
| { |
| struct target_ops *t; |
| |
| /* If we're already connected to something that can get us OS |
| related data, use it. Otherwise, try using the native |
| target. */ |
| if (current_target.to_stratum >= process_stratum) |
| t = current_target.beneath; |
| else |
| t = find_default_run_target ("get OS data"); |
| |
| if (!t) |
| return NULL; |
| |
| return target_read_stralloc (t, TARGET_OBJECT_OSDATA, type); |
| } |
| |
| static struct address_space * |
| default_thread_address_space (struct target_ops *self, ptid_t ptid) |
| { |
| struct inferior *inf; |
| |
| /* Fall-back to the "main" address space of the inferior. */ |
| inf = find_inferior_ptid (ptid); |
| |
| if (inf == NULL || inf->aspace == NULL) |
| internal_error (__FILE__, __LINE__, |
| _("Can't determine the current " |
| "address space of thread %s\n"), |
| target_pid_to_str (ptid)); |
| |
| return inf->aspace; |
| } |
| |
| /* Determine the current address space of thread PTID. */ |
| |
| struct address_space * |
| target_thread_address_space (ptid_t ptid) |
| { |
| struct address_space *aspace; |
| |
| aspace = current_target.to_thread_address_space (¤t_target, ptid); |
| gdb_assert (aspace != NULL); |
| |
| return aspace; |
| } |
| |
| |
| /* Target file operations. */ |
| |
| static struct target_ops * |
| default_fileio_target (void) |
| { |
| /* If we're already connected to something that can perform |
| file I/O, use it. Otherwise, try using the native target. */ |
| if (current_target.to_stratum >= process_stratum) |
| return current_target.beneath; |
| else |
| return find_default_run_target ("file I/O"); |
| } |
| |
| /* File handle for target file operations. */ |
| |
| typedef struct |
| { |
| /* The target on which this file is open. */ |
| struct target_ops *t; |
| |
| /* The file descriptor on the target. */ |
| int fd; |
| } fileio_fh_t; |
| |
| DEF_VEC_O (fileio_fh_t); |
| |
| /* Vector of currently open file handles. The value returned by |
| target_fileio_open and passed as the FD argument to other |
| target_fileio_* functions is an index into this vector. This |
| vector's entries are never freed; instead, files are marked as |
| closed, and the handle becomes available for reuse. */ |
| static VEC (fileio_fh_t) *fileio_fhandles; |
| |
| /* Macro to check whether a fileio_fh_t represents a closed file. */ |
| #define is_closed_fileio_fh(fd) ((fd) < 0) |
| |
| /* Index into fileio_fhandles of the lowest handle that might be |
| closed. This permits handle reuse without searching the whole |
| list each time a new file is opened. */ |
| static int lowest_closed_fd; |
| |
| /* Acquire a target fileio file descriptor. */ |
| |
| static int |
| acquire_fileio_fd (struct target_ops *t, int fd) |
| { |
| fileio_fh_t *fh, buf; |
| |
| gdb_assert (!is_closed_fileio_fh (fd)); |
| |
| /* Search for closed handles to reuse. */ |
| for (; |
| VEC_iterate (fileio_fh_t, fileio_fhandles, |
| lowest_closed_fd, fh); |
| lowest_closed_fd++) |
| if (is_closed_fileio_fh (fh->fd)) |
| break; |
| |
| /* Push a new handle if no closed handles were found. */ |
| if (lowest_closed_fd == VEC_length (fileio_fh_t, fileio_fhandles)) |
| fh = VEC_safe_push (fileio_fh_t, fileio_fhandles, NULL); |
| |
| /* Fill in the handle. */ |
| fh->t = t; |
| fh->fd = fd; |
| |
| /* Return its index, and start the next lookup at |
| the next index. */ |
| return lowest_closed_fd++; |
| } |
| |
| /* Release a target fileio file descriptor. */ |
| |
| static void |
| release_fileio_fd (int fd, fileio_fh_t *fh) |
| { |
| fh->fd = -1; |
| lowest_closed_fd = min (lowest_closed_fd, fd); |
| } |
| |
| /* Return a pointer to the fileio_fhandle_t corresponding to FD. */ |
| |
| #define fileio_fd_to_fh(fd) \ |
| VEC_index (fileio_fh_t, fileio_fhandles, (fd)) |
| |
| /* Helper for target_fileio_open and |
| target_fileio_open_warn_if_slow. */ |
| |
| static int |
| target_fileio_open_1 (struct inferior *inf, const char *filename, |
| int flags, int mode, int warn_if_slow, |
| int *target_errno) |
| { |
| struct target_ops *t; |
| |
| for (t = default_fileio_target (); t != NULL; t = t->beneath) |
| { |
| if (t->to_fileio_open != NULL) |
| { |
| int fd = t->to_fileio_open (t, inf, filename, flags, mode, |
| warn_if_slow, target_errno); |
| |
| if (fd < 0) |
| fd = -1; |
| else |
| fd = acquire_fileio_fd (t, fd); |
| |
| if (targetdebug) |
| fprintf_unfiltered (gdb_stdlog, |
| "target_fileio_open (%d,%s,0x%x,0%o,%d)" |
| " = %d (%d)\n", |
| inf == NULL ? 0 : inf->num, |
| filename, flags, mode, |
| warn_if_slow, fd, |
| fd != -1 ? 0 : *target_errno); |
| return fd; |
| } |
| } |
| |
| *target_errno = FILEIO_ENOSYS; |
| return -1; |
| } |
| |
| /* See target.h. */ |
| |
| int |
| target_fileio_open (struct inferior *inf, const char *filename, |
| int flags, int mode, int *target_errno) |
| { |
| return target_fileio_open_1 (inf, filename, flags, mode, 0, |
| target_errno); |
| } |
| |
| /* See target.h. */ |
| |
| int |
| target_fileio_open_warn_if_slow (struct inferior *inf, |
| const char *filename, |
| int flags, int mode, int *target_errno) |
| { |
| return target_fileio_open_1 (inf, filename, flags, mode, 1, |
| target_errno); |
| } |
| |
| /* See target.h. */ |
| |
| int |
| target_fileio_pwrite (int fd, const gdb_byte *write_buf, int len, |
| ULONGEST offset, int *target_errno) |
| { |
| fileio_fh_t *fh = fileio_fd_to_fh (fd); |
| int ret = -1; |
| |
| if (is_closed_fileio_fh (fh->fd)) |
| *target_errno = EBADF; |
| else |
| ret = fh->t->to_fileio_pwrite (fh->t, fh->fd, write_buf, |
| len, offset, target_errno); |
| |
| if (targetdebug) |
| fprintf_unfiltered (gdb_stdlog, |
| "target_fileio_pwrite (%d,...,%d,%s) " |
| "= %d (%d)\n", |
| fd, len, pulongest (offset), |
| ret, ret != -1 ? 0 : *target_errno); |
| return ret; |
| } |
| |
| /* See target.h. */ |
| |
| int |
| target_fileio_pread (int fd, gdb_byte *read_buf, int len, |
| ULONGEST offset, int *target_errno) |
| { |
| fileio_fh_t *fh = fileio_fd_to_fh (fd); |
| int ret = -1; |
| |
| if (is_closed_fileio_fh (fh->fd)) |
| *target_errno = EBADF; |
| else |
| ret = fh->t->to_fileio_pread (fh->t, fh->fd, read_buf, |
| len, offset, target_errno); |
| |
| if (targetdebug) |
| fprintf_unfiltered (gdb_stdlog, |
| "target_fileio_pread (%d,...,%d,%s) " |
| "= %d (%d)\n", |
| fd, len, pulongest (offset), |
| ret, ret != -1 ? 0 : *target_errno); |
| return ret; |
| } |
| |
| /* See target.h. */ |
| |
| int |
| target_fileio_fstat (int fd, struct stat *sb, int *target_errno) |
| { |
| fileio_fh_t *fh = fileio_fd_to_fh (fd); |
| int ret = -1; |
| |
| if (is_closed_fileio_fh (fh->fd)) |
| *target_errno = EBADF; |
| else |
| ret = fh->t->to_fileio_fstat (fh->t, fh->fd, sb, target_errno); |
| |
| if (targetdebug) |
| fprintf_unfiltered (gdb_stdlog, |
| "target_fileio_fstat (%d) = %d (%d)\n", |
| fd, ret, ret != -1 ? 0 : *target_errno); |
| return ret; |
| } |
| |
| /* See target.h. */ |
| |
| int |
| target_fileio_close (int fd, int *target_errno) |
| { |
| fileio_fh_t *fh = fileio_fd_to_fh (fd); |
| int ret = -1; |
| |
| if (is_closed_fileio_fh (fh->fd)) |
| *target_errno = EBADF; |
| else |
| { |
| ret = fh->t->to_fileio_close (fh->t, fh->fd, target_errno); |
| release_fileio_fd (fd, fh); |
| } |
| |
| if (targetdebug) |
| fprintf_unfiltered (gdb_stdlog, |
| "target_fileio_close (%d) = %d (%d)\n", |
| fd, ret, ret != -1 ? 0 : *target_errno); |
| return ret; |
| } |
| |
| /* See target.h. */ |
| |
| int |
| target_fileio_unlink (struct inferior *inf, const char *filename, |
| int *target_errno) |
| { |
| struct target_ops *t; |
| |
| for (t = default_fileio_target (); t != NULL; t = t->beneath) |
| { |
| if (t->to_fileio_unlink != NULL) |
| { |
| int ret = t->to_fileio_unlink (t, inf, filename, |
| target_errno); |
| |
| if (targetdebug) |
| fprintf_unfiltered (gdb_stdlog, |
| "target_fileio_unlink (%d,%s)" |
| " = %d (%d)\n", |
| inf == NULL ? 0 : inf->num, filename, |
| ret, ret != -1 ? 0 : *target_errno); |
| return ret; |
| } |
| } |
| |
| *target_errno = FILEIO_ENOSYS; |
| return -1; |
| } |
| |
| /* See target.h. */ |
| |
| char * |
| target_fileio_readlink (struct inferior *inf, const char *filename, |
| int *target_errno) |
| { |
| struct target_ops *t; |
| |
| for (t = default_fileio_target (); t != NULL; t = t->beneath) |
| { |
| if (t->to_fileio_readlink != NULL) |
| { |
| char *ret = t->to_fileio_readlink (t, inf, filename, |
| target_errno); |
| |
| if (targetdebug) |
| fprintf_unfiltered (gdb_stdlog, |
| "target_fileio_readlink (%d,%s)" |
| " = %s (%d)\n", |
| inf == NULL ? 0 : inf->num, |
| filename, ret? ret : "(nil)", |
| ret? 0 : *target_errno); |
| return ret; |
| } |
| } |
| |
| *target_errno = FILEIO_ENOSYS; |
| return NULL; |
| } |
| |
| static void |
| target_fileio_close_cleanup (void *opaque) |
| { |
| int fd = *(int *) opaque; |
| int target_errno; |
| |
| target_fileio_close (fd, &target_errno); |
| } |
| |
| /* Read target file FILENAME, in the filesystem as seen by INF. If |
| INF is NULL, use the filesystem seen by the debugger (GDB or, for |
| remote targets, the remote stub). Store the result in *BUF_P and |
| return the size of the transferred data. PADDING additional bytes |
| are available in *BUF_P. This is a helper function for |
| target_fileio_read_alloc; see the declaration of that function for |
| more information. */ |
| |
| static LONGEST |
| target_fileio_read_alloc_1 (struct inferior *inf, const char *filename, |
| gdb_byte **buf_p, int padding) |
| { |
| struct cleanup *close_cleanup; |
| size_t buf_alloc, buf_pos; |
| gdb_byte *buf; |
| LONGEST n; |
| int fd; |
| int target_errno; |
| |
| fd = target_fileio_open (inf, filename, FILEIO_O_RDONLY, 0700, |
| &target_errno); |
| if (fd == -1) |
| return -1; |
| |
| close_cleanup = make_cleanup (target_fileio_close_cleanup, &fd); |
| |
| /* Start by reading up to 4K at a time. The target will throttle |
| this number down if necessary. */ |
| buf_alloc = 4096; |
| buf = (gdb_byte *) xmalloc (buf_alloc); |
| buf_pos = 0; |
| while (1) |
| { |
| n = target_fileio_pread (fd, &buf[buf_pos], |
| buf_alloc - buf_pos - padding, buf_pos, |
| &target_errno); |
| if (n < 0) |
| { |
| /* An error occurred. */ |
| do_cleanups (close_cleanup); |
| xfree (buf); |
| return -1; |
| } |
| else if (n == 0) |
| { |
| /* Read all there was. */ |
| do_cleanups (close_cleanup); |
| if (buf_pos == 0) |
| xfree (buf); |
| else |
| *buf_p = buf; |
| return buf_pos; |
| } |
| |
| buf_pos += n; |
| |
| /* If the buffer is filling up, expand it. */ |
| if (buf_alloc < buf_pos * 2) |
| { |
| buf_alloc *= 2; |
| buf = (gdb_byte *) xrealloc (buf, buf_alloc); |
| } |
| |
| QUIT; |
| } |
| } |
| |
| /* See target.h. */ |
| |
| LONGEST |
| target_fileio_read_alloc (struct inferior *inf, const char *filename, |
| gdb_byte **buf_p) |
| { |
| return target_fileio_read_alloc_1 (inf, filename, buf_p, 0); |
| } |
| |
| /* See target.h. */ |
| |
| char * |
| target_fileio_read_stralloc (struct inferior *inf, const char *filename) |
| { |
| gdb_byte *buffer; |
| char *bufstr; |
| LONGEST i, transferred; |
| |
| transferred = target_fileio_read_alloc_1 (inf, filename, &buffer, 1); |
| bufstr = (char *) buffer; |
| |
| if (transferred < 0) |
| return NULL; |
| |
| if (transferred == 0) |
| return xstrdup (""); |
| |
| bufstr[transferred] = 0; |
| |
| /* Check for embedded NUL bytes; but allow trailing NULs. */ |
| for (i = strlen (bufstr); i < transferred; i++) |
| if (bufstr[i] != 0) |
| { |
| warning (_("target file %s " |
| "contained unexpected null characters"), |
| filename); |
| break; |
| } |
| |
| return bufstr; |
| } |
| |
| |
| static int |
| default_region_ok_for_hw_watchpoint (struct target_ops *self, |
| CORE_ADDR addr, int len) |
| { |
| return (len <= gdbarch_ptr_bit (target_gdbarch ()) / TARGET_CHAR_BIT); |
| } |
| |
| static int |
| default_watchpoint_addr_within_range (struct target_ops *target, |
| CORE_ADDR addr, |
| CORE_ADDR start, int length) |
| { |
| return addr >= start && addr < start + length; |
| } |
| |
| static struct gdbarch * |
| default_thread_architecture (struct target_ops *ops, ptid_t ptid) |
| { |
| return target_gdbarch (); |
| } |
| |
| static int |
| return_zero (struct target_ops *ignore) |
| { |
| return 0; |
| } |
| |
| static int |
| return_zero_has_execution (struct target_ops *ignore, ptid_t ignore2) |
| { |
| return 0; |
| } |
| |
| /* |
| * Find the next target down the stack from the specified target. |
| */ |
| |
| struct target_ops * |
| find_target_beneath (struct target_ops *t) |
| { |
| return t->beneath; |
| } |
| |
| /* See target.h. */ |
| |
| struct target_ops * |
| find_target_at (enum strata stratum) |
| { |
| struct target_ops *t; |
| |
| for (t = current_target.beneath; t != NULL; t = t->beneath) |
| if (t->to_stratum == stratum) |
| return t; |
| |
| return NULL; |
| } |
| |
| |
| /* The inferior process has died. Long live the inferior! */ |
| |
| void |
| generic_mourn_inferior (void) |
| { |
| ptid_t ptid; |
| |
| ptid = inferior_ptid; |
| inferior_ptid = null_ptid; |
| |
| /* Mark breakpoints uninserted in case something tries to delete a |
| breakpoint while we delete the inferior's threads (which would |
| fail, since the inferior is long gone). */ |
| mark_breakpoints_out (); |
| |
| if (!ptid_equal (ptid, null_ptid)) |
| { |
| int pid = ptid_get_pid (ptid); |
| exit_inferior (pid); |
| } |
| |
| /* Note this wipes step-resume breakpoints, so needs to be done |
| after exit_inferior, which ends up referencing the step-resume |
| breakpoints through clear_thread_inferior_resources. */ |
| breakpoint_init_inferior (inf_exited); |
| |
| registers_changed (); |
| |
| reopen_exec_file (); |
| reinit_frame_cache (); |
| |
| if (deprecated_detach_hook) |
| deprecated_detach_hook (); |
| } |
| |
| /* Convert a normal process ID to a string. Returns the string in a |
| static buffer. */ |
| |
| char * |
| normal_pid_to_str (ptid_t ptid) |
| { |
| static char buf[32]; |
| |
| xsnprintf (buf, sizeof buf, "process %d", ptid_get_pid (ptid)); |
| return buf; |
| } |
| |
| static char * |
| default_pid_to_str (struct target_ops *ops, ptid_t ptid) |
| { |
| return normal_pid_to_str (ptid); |
| } |
| |
| /* Error-catcher for target_find_memory_regions. */ |
| static int |
| dummy_find_memory_regions (struct target_ops *self, |
| find_memory_region_ftype ignore1, void *ignore2) |
| { |
| error (_("Command not implemented for this target.")); |
| return 0; |
| } |
| |
| /* Error-catcher for target_make_corefile_notes. */ |
| static char * |
| dummy_make_corefile_notes (struct target_ops *self, |
| bfd *ignore1, int *ignore2) |
| { |
| error (_("Command not implemented for this target.")); |
| return NULL; |
| } |
| |
| /* Set up the handful of non-empty slots needed by the dummy target |
| vector. */ |
| |
| static void |
| init_dummy_target (void) |
| { |
| dummy_target.to_shortname = "None"; |
| dummy_target.to_longname = "None"; |
| dummy_target.to_doc = ""; |
| dummy_target.to_supports_disable_randomization |
| = find_default_supports_disable_randomization; |
| dummy_target.to_stratum = dummy_stratum; |
| dummy_target.to_has_all_memory = return_zero; |
| dummy_target.to_has_memory = return_zero; |
| dummy_target.to_has_stack = return_zero; |
| dummy_target.to_has_registers = return_zero; |
| dummy_target.to_has_execution = return_zero_has_execution; |
| dummy_target.to_magic = OPS_MAGIC; |
| |
| install_dummy_methods (&dummy_target); |
| } |
| |
| |
| void |
| target_close (struct target_ops *targ) |
| { |
| gdb_assert (!target_is_pushed (targ)); |
| |
| if (targ->to_xclose != NULL) |
| targ->to_xclose (targ); |
| else if (targ->to_close != NULL) |
| targ->to_close (targ); |
| |
| if (targetdebug) |
| fprintf_unfiltered (gdb_stdlog, "target_close ()\n"); |
| } |
| |
| int |
| target_thread_alive (ptid_t ptid) |
| { |
| return current_target.to_thread_alive (¤t_target, ptid); |
| } |
| |
| void |
| target_update_thread_list (void) |
| { |
| current_target.to_update_thread_list (¤t_target); |
| } |
| |
| void |
| target_stop (ptid_t ptid) |
| { |
| if (!may_stop) |
| { |
| warning (_("May not interrupt or stop the target, ignoring attempt")); |
| return; |
| } |
| |
| (*current_target.to_stop) (¤t_target, ptid); |
| } |
| |
| void |
| target_interrupt (ptid_t ptid) |
| { |
| if (!may_stop) |
| { |
| warning (_("May not interrupt or stop the target, ignoring attempt")); |
| return; |
| } |
| |
| (*current_target.to_interrupt) (¤t_target, ptid); |
| } |
| |
| /* See target.h. */ |
| |
| void |
| target_check_pending_interrupt (void) |
| { |
| (*current_target.to_check_pending_interrupt) (¤t_target); |
| } |
| |
| /* See target/target.h. */ |
| |
| void |
| target_stop_and_wait (ptid_t ptid) |
| { |
| struct target_waitstatus status; |
| int was_non_stop = non_stop; |
| |
| non_stop = 1; |
| target_stop (ptid); |
| |
| memset (&status, 0, sizeof (status)); |
| target_wait (ptid, &status, 0); |
| |
| non_stop = was_non_stop; |
| } |
| |
| /* See target/target.h. */ |
| |
| void |
| target_continue_no_signal (ptid_t ptid) |
| { |
| target_resume (ptid, 0, GDB_SIGNAL_0); |
| } |
| |
| /* Concatenate ELEM to LIST, a comma separate list, and return the |
| result. The LIST incoming argument is released. */ |
| |
| static char * |
| str_comma_list_concat_elem (char *list, const char *elem) |
| { |
| if (list == NULL) |
| return xstrdup (elem); |
| else |
| return reconcat (list, list, ", ", elem, (char *) NULL); |
| } |
| |
| /* Helper for target_options_to_string. If OPT is present in |
| TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET. |
| Returns the new resulting string. OPT is removed from |
| TARGET_OPTIONS. */ |
| |
| static char * |
| do_option (int *target_options, char *ret, |
| int opt, char *opt_str) |
| { |
| if ((*target_options & opt) != 0) |
| { |
| ret = str_comma_list_concat_elem (ret, opt_str); |
| *target_options &= ~opt; |
| } |
| |
| return ret; |
| } |
| |
| char * |
| target_options_to_string (int target_options) |
| { |
| char *ret = NULL; |
| |
| #define DO_TARG_OPTION(OPT) \ |
| ret = do_option (&target_options, ret, OPT, #OPT) |
| |
| DO_TARG_OPTION (TARGET_WNOHANG); |
| |
| if (target_options != 0) |
| ret = str_comma_list_concat_elem (ret, "unknown???"); |
| |
| if (ret == NULL) |
| ret = xstrdup (""); |
| return ret; |
| } |
| |
| static void |
| debug_print_register (const char * func, |
| struct regcache *regcache, int regno) |
| { |
| struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| |
| fprintf_unfiltered (gdb_stdlog, "%s ", func); |
| if (regno >= 0 && regno < gdbarch_num_regs (gdbarch) |
| && gdbarch_register_name (gdbarch, regno) != NULL |
| && gdbarch_register_name (gdbarch, regno)[0] != '\0') |
| fprintf_unfiltered (gdb_stdlog, "(%s)", |
| gdbarch_register_name (gdbarch, regno)); |
| else |
| fprintf_unfiltered (gdb_stdlog, "(%d)", regno); |
| if (regno >= 0 && regno < gdbarch_num_regs (gdbarch)) |
| { |
| enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
| int i, size = register_size (gdbarch, regno); |
| gdb_byte buf[MAX_REGISTER_SIZE]; |
| |
| regcache_raw_collect (regcache, regno, buf); |
| fprintf_unfiltered (gdb_stdlog, " = "); |
| for (i = 0; i < size; i++) |
| { |
| fprintf_unfiltered (gdb_stdlog, "%02x", buf[i]); |
| } |
| if (size <= sizeof (LONGEST)) |
| { |
| ULONGEST val = extract_unsigned_integer (buf, size, byte_order); |
| |
| fprintf_unfiltered (gdb_stdlog, " %s %s", |
| core_addr_to_string_nz (val), plongest (val)); |
| } |
| } |
| fprintf_unfiltered (gdb_stdlog, "\n"); |
| } |
| |
| void |
| target_fetch_registers (struct regcache *regcache, int regno) |
| { |
| current_target.to_fetch_registers (¤t_target, regcache, regno); |
| if (targetdebug) |
| debug_print_register ("target_fetch_registers", regcache, regno); |
| } |
| |
| void |
| target_store_registers (struct regcache *regcache, int regno) |
| { |
| struct target_ops *t; |
| |
| if (!may_write_registers) |
| error (_("Writing to registers is not allowed (regno %d)"), regno); |
| |
| current_target.to_store_registers (¤t_target, regcache, regno); |
| if (targetdebug) |
| { |
| debug_print_register ("target_store_registers", regcache, regno); |
| } |
| } |
| |
| int |
| target_core_of_thread (ptid_t ptid) |
| { |
| return current_target.to_core_of_thread (¤t_target, ptid); |
| } |
| |
| int |
| simple_verify_memory (struct target_ops *ops, |
| const gdb_byte *data, CORE_ADDR lma, ULONGEST size) |
| { |
| LONGEST total_xfered = 0; |
| |
| while (total_xfered < size) |
| { |
| ULONGEST xfered_len; |
| enum target_xfer_status status; |
| gdb_byte buf[1024]; |
| ULONGEST howmuch = min (sizeof (buf), size - total_xfered); |
| |
| status = target_xfer_partial (ops, TARGET_OBJECT_MEMORY, NULL, |
| buf, NULL, lma + total_xfered, howmuch, |
| &xfered_len); |
| if (status == TARGET_XFER_OK |
| && memcmp (data + total_xfered, buf, xfered_len) == 0) |
| { |
| total_xfered += xfered_len; |
| QUIT; |
| } |
| else |
| return 0; |
| } |
| return 1; |
| } |
| |
| /* Default implementation of memory verification. */ |
| |
| static int |
| default_verify_memory (struct target_ops *self, |
| const gdb_byte *data, CORE_ADDR memaddr, ULONGEST size) |
| { |
| /* Start over from the top of the target stack. */ |
| return simple_verify_memory (current_target.beneath, |
| data, memaddr, size); |
| } |
| |
| int |
| target_verify_memory (const gdb_byte *data, CORE_ADDR memaddr, ULONGEST size) |
| { |
| return current_target.to_verify_memory (¤t_target, |
| data, memaddr, size); |
| } |
| |
| /* The documentation for this function is in its prototype declaration in |
| target.h. */ |
| |
| int |
| target_insert_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask, |
| enum target_hw_bp_type rw) |
| { |
| return current_target.to_insert_mask_watchpoint (¤t_target, |
| addr, mask, rw); |
| } |
| |
| /* The documentation for this function is in its prototype declaration in |
| target.h. */ |
| |
| int |
| target_remove_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask, |
| enum target_hw_bp_type rw) |
| { |
| return current_target.to_remove_mask_watchpoint (¤t_target, |
| addr, mask, rw); |
| } |
| |
| /* The documentation for this function is in its prototype declaration |
| in target.h. */ |
| |
| int |
| target_masked_watch_num_registers (CORE_ADDR addr, CORE_ADDR mask) |
| { |
| return current_target.to_masked_watch_num_registers (¤t_target, |
| addr, mask); |
| } |
| |
| /* The documentation for this function is in its prototype declaration |
| in target.h. */ |
| |
| int |
| target_ranged_break_num_registers (void) |
| { |
| return current_target.to_ranged_break_num_registers (¤t_target); |
| } |
| |
| /* See target.h. */ |
| |
| int |
| target_supports_btrace (enum btrace_format format) |
| { |
| return current_target.to_supports_btrace (¤t_target, format); |
| } |
| |
| /* See target.h. */ |
| |
| struct btrace_target_info * |
| target_enable_btrace (ptid_t ptid, const struct btrace_config *conf) |
| { |
| return current_target.to_enable_btrace (¤t_target, ptid, conf); |
| } |
| |
| /* See target.h. */ |
| |
| void |
| target_disable_btrace (struct btrace_target_info *btinfo) |
| { |
| current_target.to_disable_btrace (¤t_target, btinfo); |
| } |
| |
| /* See target.h. */ |
| |
| void |
| target_teardown_btrace (struct btrace_target_info *btinfo) |
| { |
| current_target.to_teardown_btrace (¤t_target, btinfo); |
| } |
| |
| /* See target.h. */ |
| |
| enum btrace_error |
| target_read_btrace (struct btrace_data *btrace, |
| struct btrace_target_info *btinfo, |
| enum btrace_read_type type) |
| { |
| return current_target.to_read_btrace (¤t_target, btrace, btinfo, type); |
| } |
| |
| /* See target.h. */ |
| |
| const struct btrace_config * |
| target_btrace_conf (const struct btrace_target_info *btinfo) |
| { |
| return current_target.to_btrace_conf (¤t_target, btinfo); |
| } |
| |
| /* See target.h. */ |
| |
| void |
| target_stop_recording (void) |
| { |
| current_target.to_stop_recording (¤t_target); |
| } |
| |
| /* See target.h. */ |
| |
| void |
| target_save_record (const char *filename) |
| { |
| current_target.to_save_record (¤t_target, filename); |
| } |
| |
| /* See target.h. */ |
| |
| int |
| target_supports_delete_record (void) |
| { |
| struct target_ops *t; |
| |
| for (t = current_target.beneath; t != NULL; t = t->beneath) |
| if (t->to_delete_record != delegate_delete_record |
| && t->to_delete_record != tdefault_delete_record) |
| return 1; |
| |
| return 0; |
| } |
| |
| /* See target.h. */ |
| |
| void |
| target_delete_record (void) |
| { |
| current_target.to_delete_record (¤t_target); |
| } |
| |
| /* See target.h. */ |
| |
| int |
| target_record_is_replaying (ptid_t ptid) |
| { |
| return current_target.to_record_is_replaying (¤t_target, ptid); |
| } |
| |
| /* See target.h. */ |
| |
| int |
| target_record_will_replay (ptid_t ptid, int dir) |
| { |
| return current_target.to_record_will_replay (¤t_target, ptid, dir); |
| } |
| |
| /* See target.h. */ |
| |
| void |
| target_record_stop_replaying (void) |
| { |
| current_target.to_record_stop_replaying (¤t_target); |
| } |
| |
| /* See target.h. */ |
| |
| void |
| target_goto_record_begin (void) |
| { |
| current_target.to_goto_record_begin (¤t_target); |
| } |
| |
| /* See target.h. */ |
| |
| void |
| target_goto_record_end (void) |
| { |
| current_target.to_goto_record_end (¤t_target); |
| } |
| |
| /* See target.h. */ |
| |
| void |
| target_goto_record (ULONGEST insn) |
| { |
| current_target.to_goto_record (¤t_target, insn); |
| } |
| |
| /* See target.h. */ |
| |
| void |
| target_insn_history (int size, int flags) |
| { |
| current_target.to_insn_history (¤t_target, size, flags); |
| } |
| |
| /* See target.h. */ |
| |
| void |
| target_insn_history_from (ULONGEST from, int size, int flags) |
| { |
| current_target.to_insn_history_from (¤t_target, from, size, flags); |
| } |
| |
| /* See target.h. */ |
| |
| void |
| target_insn_history_range (ULONGEST begin, ULONGEST end, int flags) |
| { |
| current_target.to_insn_history_range (¤t_target, begin, end, flags); |
| } |
| |
| /* See target.h. */ |
| |
| void |
| target_call_history (int size, int flags) |
| { |
| current_target.to_call_history (¤t_target, size, flags); |
| } |
| |
| /* See target.h. */ |
| |
| void |
| target_call_history_from (ULONGEST begin, int size, int flags) |
| { |
| current_target.to_call_history_from (¤t_target, begin, size, flags); |
| } |
| |
| /* See target.h. */ |
| |
| void |
| target_call_history_range (ULONGEST begin, ULONGEST end, int flags) |
| { |
| current_target.to_call_history_range (¤t_target, begin, end, flags); |
| } |
| |
| /* See target.h. */ |
| |
| const struct frame_unwind * |
| target_get_unwinder (void) |
| { |
| return current_target.to_get_unwinder (¤t_target); |
| } |
| |
| /* See target.h. */ |
| |
| const struct frame_unwind * |
| target_get_tailcall_unwinder (void) |
| { |
| return current_target.to_get_tailcall_unwinder (¤t_target); |
| } |
| |
| /* See target.h. */ |
| |
| void |
| target_prepare_to_generate_core (void) |
| { |
| current_target.to_prepare_to_generate_core (¤t_target); |
| } |
| |
| /* See target.h. */ |
| |
| void |
| target_done_generating_core (void) |
| { |
| current_target.to_done_generating_core (¤t_target); |
| } |
| |
| static void |
| setup_target_debug (void) |
| { |
| memcpy (&debug_target, ¤t_target, sizeof debug_target); |
| |
| init_debug_target (¤t_target); |
| } |
| |
| |
| static char targ_desc[] = |
| "Names of targets and files being debugged.\nShows the entire \ |
| stack of targets currently in use (including the exec-file,\n\ |
| core-file, and process, if any), as well as the symbol file name."; |
| |
| static void |
| default_rcmd (struct target_ops *self, const char *command, |
| struct ui_file *output) |
| { |
| error (_("\"monitor\" command not supported by this target.")); |
| } |
| |
| static void |
| do_monitor_command (char *cmd, |
| int from_tty) |
| { |
| target_rcmd (cmd, gdb_stdtarg); |
| } |
| |
| /* Print the name of each layers of our target stack. */ |
| |
| static void |
| maintenance_print_target_stack (char *cmd, int from_tty) |
| { |
| struct target_ops *t; |
| |
| printf_filtered (_("The current target stack is:\n")); |
| |
| for (t = target_stack; t != NULL; t = t->beneath) |
| { |
| printf_filtered (" - %s (%s)\n", t->to_shortname, t->to_longname); |
| } |
| } |
| |
| /* See target.h. */ |
| |
| void |
| target_async (int enable) |
| { |
| infrun_async (enable); |
| current_target.to_async (¤t_target, enable); |
| } |
| |
| /* See target.h. */ |
| |
| void |
| target_thread_events (int enable) |
| { |
| current_target.to_thread_events (¤t_target, enable); |
| } |
| |
| /* Controls if targets can report that they can/are async. This is |
| just for maintainers to use when debugging gdb. */ |
| int target_async_permitted = 1; |
| |
| /* The set command writes to this variable. If the inferior is |
| executing, target_async_permitted is *not* updated. */ |
| static int target_async_permitted_1 = 1; |
| |
| static void |
| maint_set_target_async_command (char *args, int from_tty, |
| struct cmd_list_element *c) |
| { |
| if (have_live_inferiors ()) |
| { |
| target_async_permitted_1 = target_async_permitted; |
| error (_("Cannot change this setting while the inferior is running.")); |
| } |
| |
| target_async_permitted = target_async_permitted_1; |
| } |
| |
| static void |
| maint_show_target_async_command (struct ui_file *file, int from_tty, |
| struct cmd_list_element *c, |
| const char *value) |
| { |
| fprintf_filtered (file, |
| _("Controlling the inferior in " |
| "asynchronous mode is %s.\n"), value); |
| } |
| |
| /* Return true if the target operates in non-stop mode even with "set |
| non-stop off". */ |
| |
| static int |
| target_always_non_stop_p (void) |
| { |
| return current_target.to_always_non_stop_p (¤t_target); |
| } |
| |
| /* See target.h. */ |
| |
| int |
| target_is_non_stop_p (void) |
| { |
| return (non_stop |
| || target_non_stop_enabled == AUTO_BOOLEAN_TRUE |
| || (target_non_stop_enabled == AUTO_BOOLEAN_AUTO |
| && target_always_non_stop_p ())); |
| } |
| |
| /* Controls if targets can report that they always run in non-stop |
| mode. This is just for maintainers to use when debugging gdb. */ |
| enum auto_boolean target_non_stop_enabled = AUTO_BOOLEAN_AUTO; |
| |
| /* The set command writes to this variable. If the inferior is |
| executing, target_non_stop_enabled is *not* updated. */ |
| static enum auto_boolean target_non_stop_enabled_1 = AUTO_BOOLEAN_AUTO; |
| |
| /* Implementation of "maint set target-non-stop". */ |
| |
| static void |
| maint_set_target_non_stop_command (char *args, int from_tty, |
| struct cmd_list_element *c) |
| { |
| if (have_live_inferiors ()) |
| { |
| target_non_stop_enabled_1 = target_non_stop_enabled; |
| error (_("Cannot change this setting while the inferior is running.")); |
| } |
| |
| target_non_stop_enabled = target_non_stop_enabled_1; |
| } |
| |
| /* Implementation of "maint show target-non-stop". */ |
| |
| static void |
| maint_show_target_non_stop_command (struct ui_file *file, int from_tty, |
| struct cmd_list_element *c, |
| const char *value) |
| { |
| if (target_non_stop_enabled == AUTO_BOOLEAN_AUTO) |
| fprintf_filtered (file, |
| _("Whether the target is always in non-stop mode " |
| "is %s (currently %s).\n"), value, |
| target_always_non_stop_p () ? "on" : "off"); |
| else |
| fprintf_filtered (file, |
| _("Whether the target is always in non-stop mode " |
| "is %s.\n"), value); |
| } |
| |
| /* Temporary copies of permission settings. */ |
| |
| static int may_write_registers_1 = 1; |
| static int may_write_memory_1 = 1; |
| static int may_insert_breakpoints_1 = 1; |
| static int may_insert_tracepoints_1 = 1; |
| static int may_insert_fast_tracepoints_1 = 1; |
| static int may_stop_1 = 1; |
| |
| /* Make the user-set values match the real values again. */ |
| |
| void |
| update_target_permissions (void) |
| { |
| may_write_registers_1 = may_write_registers; |
| may_write_memory_1 = may_write_memory; |
| may_insert_breakpoints_1 = may_insert_breakpoints; |
| may_insert_tracepoints_1 = may_insert_tracepoints; |
| may_insert_fast_tracepoints_1 = may_insert_fast_tracepoints; |
| may_stop_1 = may_stop; |
| } |
| |
| /* The one function handles (most of) the permission flags in the same |
| way. */ |
| |
| static void |
| set_target_permissions (char *args, int from_tty, |
| struct cmd_list_element *c) |
| { |
| if (target_has_execution) |
| { |
| update_target_permissions (); |
| error (_("Cannot change this setting while the inferior is running.")); |
| } |
| |
| /* Make the real values match the user-changed values. */ |
| may_write_registers = may_write_registers_1; |
| may_insert_breakpoints = may_insert_breakpoints_1; |
| may_insert_tracepoints = may_insert_tracepoints_1; |
| may_insert_fast_tracepoints = may_insert_fast_tracepoints_1; |
| may_stop = may_stop_1; |
| update_observer_mode (); |
| } |
| |
| /* Set memory write permission independently of observer mode. */ |
| |
| static void |
| set_write_memory_permission (char *args, int from_tty, |
| struct cmd_list_element *c) |
| { |
| /* Make the real values match the user-changed values. */ |
| may_write_memory = may_write_memory_1; |
| update_observer_mode (); |
| } |
| |
| |
| void |
| initialize_targets (void) |
| { |
| init_dummy_target (); |
| push_target (&dummy_target); |
| |
| add_info ("target", target_info, targ_desc); |
| add_info ("files", target_info, targ_desc); |
| |
| add_setshow_zuinteger_cmd ("target", class_maintenance, &targetdebug, _("\ |
| Set target debugging."), _("\ |
| Show target debugging."), _("\ |
| When non-zero, target debugging is enabled. Higher numbers are more\n\ |
| verbose."), |
| set_targetdebug, |
| show_targetdebug, |
| &setdebuglist, &showdebuglist); |
| |
| add_setshow_boolean_cmd ("trust-readonly-sections", class_support, |
| &trust_readonly, _("\ |
| Set mode for reading from readonly sections."), _("\ |
| Show mode for reading from readonly sections."), _("\ |
| When this mode is on, memory reads from readonly sections (such as .text)\n\ |
| will be read from the object file instead of from the target. This will\n\ |
| result in significant performance improvement for remote targets."), |
| NULL, |
| show_trust_readonly, |
| &setlist, &showlist); |
| |
| add_com ("monitor", class_obscure, do_monitor_command, |
| _("Send a command to the remote monitor (remote targets only).")); |
| |
| add_cmd ("target-stack", class_maintenance, maintenance_print_target_stack, |
| _("Print the name of each layer of the internal target stack."), |
| &maintenanceprintlist); |
| |
| add_setshow_boolean_cmd ("target-async", no_class, |
| &target_async_permitted_1, _("\ |
| Set whether gdb controls the inferior in asynchronous mode."), _("\ |
| Show whether gdb controls the inferior in asynchronous mode."), _("\ |
| Tells gdb whether to control the inferior in asynchronous mode."), |
| maint_set_target_async_command, |
| maint_show_target_async_command, |
| &maintenance_set_cmdlist, |
| &maintenance_show_cmdlist); |
| |
| add_setshow_auto_boolean_cmd ("target-non-stop", no_class, |
| &target_non_stop_enabled_1, _("\ |
| Set whether gdb always controls the inferior in non-stop mode."), _("\ |
| Show whether gdb always controls the inferior in non-stop mode."), _("\ |
| Tells gdb whether to control the inferior in non-stop mode."), |
| maint_set_target_non_stop_command, |
| maint_show_target_non_stop_command, |
| &maintenance_set_cmdlist, |
| &maintenance_show_cmdlist); |
| |
| add_setshow_boolean_cmd ("may-write-registers", class_support, |
| &may_write_registers_1, _("\ |
| Set permission to write into registers."), _("\ |
| Show permission to write into registers."), _("\ |
| When this permission is on, GDB may write into the target's registers.\n\ |
| Otherwise, any sort of write attempt will result in an error."), |
| set_target_permissions, NULL, |
| &setlist, &showlist); |
| |
| add_setshow_boolean_cmd ("may-write-memory", class_support, |
| &may_write_memory_1, _("\ |
| Set permission to write into target memory."), _("\ |
| Show permission to write into target memory."), _("\ |
| When this permission is on, GDB may write into the target's memory.\n\ |
| Otherwise, any sort of write attempt will result in an error."), |
| set_write_memory_permission, NULL, |
| &setlist, &showlist); |
| |
| add_setshow_boolean_cmd ("may-insert-breakpoints", class_support, |
| &may_insert_breakpoints_1, _("\ |
| Set permission to insert breakpoints in the target."), _("\ |
| Show permission to insert breakpoints in the target."), _("\ |
| When this permission is on, GDB may insert breakpoints in the program.\n\ |
| Otherwise, any sort of insertion attempt will result in an error."), |
| set_target_permissions, NULL, |
| &setlist, &showlist); |
| |
| add_setshow_boolean_cmd ("may-insert-tracepoints", class_support, |
| &may_insert_tracepoints_1, _("\ |
| Set permission to insert tracepoints in the target."), _("\ |
| Show permission to insert tracepoints in the target."), _("\ |
| When this permission is on, GDB may insert tracepoints in the program.\n\ |
| Otherwise, any sort of insertion attempt will result in an error."), |
| set_target_permissions, NULL, |
| &setlist, &showlist); |
| |
| add_setshow_boolean_cmd ("may-insert-fast-tracepoints", class_support, |
| &may_insert_fast_tracepoints_1, _("\ |
| Set permission to insert fast tracepoints in the target."), _("\ |
| Show permission to insert fast tracepoints in the target."), _("\ |
| When this permission is on, GDB may insert fast tracepoints.\n\ |
| Otherwise, any sort of insertion attempt will result in an error."), |
| set_target_permissions, NULL, |
| &setlist, &showlist); |
| |
| add_setshow_boolean_cmd ("may-interrupt", class_support, |
| &may_stop_1, _("\ |
| Set permission to interrupt or signal the target."), _("\ |
| Show permission to interrupt or signal the target."), _("\ |
| When this permission is on, GDB may interrupt/stop the target's execution.\n\ |
| Otherwise, any attempt to interrupt or stop will be ignored."), |
| set_target_permissions, NULL, |
| &setlist, &showlist); |
| |
| add_setshow_boolean_cmd ("auto-connect-native-target", class_support, |
| &auto_connect_native_target, _("\ |
| Set whether GDB may automatically connect to the native target."), _("\ |
| Show whether GDB may automatically connect to the native target."), _("\ |
| When on, and GDB is not connected to a target yet, GDB\n\ |
| attempts \"run\" and other commands with the native target."), |
| NULL, show_auto_connect_native_target, |
| &setlist, &showlist); |
| } |