| /* Select target systems and architectures at runtime for GDB. |
| |
| Copyright (C) 1990-2020 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 "gdbsupport/agent.h" |
| #include "auxv.h" |
| #include "target-debug.h" |
| #include "top.h" |
| #include "event-top.h" |
| #include <algorithm> |
| #include "gdbsupport/byte-vector.h" |
| #include "terminal.h" |
| #include <unordered_map> |
| |
| 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 void tcomplain (void) ATTRIBUTE_NORETURN; |
| |
| static struct target_ops *find_default_run_target (const char *); |
| |
| 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 std::string default_pid_to_str (struct target_ops *ops, ptid_t ptid); |
| |
| static enum exec_direction_kind default_execution_direction |
| (struct target_ops *self); |
| |
| /* Mapping between target_info objects (which have address identity) |
| and corresponding open/factory function/callback. Each add_target |
| call adds one entry to this map, and registers a "target |
| TARGET_NAME" command that when invoked calls the factory registered |
| here. The target_info object is associated with the command via |
| the command's context. */ |
| static std::unordered_map<const target_info *, target_open_ftype *> |
| target_factories; |
| |
| /* The singleton debug target. */ |
| |
| static struct target_ops *the_debug_target; |
| |
| /* The target stack. */ |
| |
| static target_stack g_target_stack; |
| |
| /* Top of target stack. */ |
| /* The target structure we are currently using to talk to a process |
| or file or whatever "inferior" we have. */ |
| |
| target_ops * |
| current_top_target () |
| { |
| return g_target_stack.top (); |
| } |
| |
| /* Command list for target. */ |
| |
| static struct cmd_list_element *targetlist = NULL; |
| |
| /* True if we should trust readonly sections from the |
| executable when reading memory. */ |
| |
| static bool trust_readonly = false; |
| |
| /* 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 |
| inadvertent disruption, such as in non-stop mode. */ |
| |
| bool may_write_registers = true; |
| |
| bool may_write_memory = true; |
| |
| bool may_insert_breakpoints = true; |
| |
| bool may_insert_tracepoints = true; |
| |
| bool may_insert_fast_tracepoints = true; |
| |
| bool may_stop = true; |
| |
| /* Non-zero if we want to see trace of target level stuff. */ |
| |
| static unsigned int targetdebug = 0; |
| |
| static void |
| set_targetdebug (const char *args, int from_tty, struct cmd_list_element *c) |
| { |
| if (targetdebug) |
| push_target (the_debug_target); |
| else |
| unpush_target (the_debug_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); |
| } |
| |
| /* The user just typed 'target' without the name of a target. */ |
| |
| static void |
| target_command (const char *arg, int from_tty) |
| { |
| fputs_filtered ("Argument required (target name). Try `help target'\n", |
| gdb_stdout); |
| } |
| |
| int |
| target_has_all_memory_1 (void) |
| { |
| for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
| if (t->has_all_memory ()) |
| return 1; |
| |
| return 0; |
| } |
| |
| int |
| target_has_memory_1 (void) |
| { |
| for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
| if (t->has_memory ()) |
| return 1; |
| |
| return 0; |
| } |
| |
| int |
| target_has_stack_1 (void) |
| { |
| for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
| if (t->has_stack ()) |
| return 1; |
| |
| return 0; |
| } |
| |
| int |
| target_has_registers_1 (void) |
| { |
| for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
| if (t->has_registers ()) |
| return 1; |
| |
| return 0; |
| } |
| |
| int |
| target_has_execution_1 (ptid_t the_ptid) |
| { |
| for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
| if (t->has_execution (the_ptid)) |
| return 1; |
| |
| return 0; |
| } |
| |
| int |
| target_has_execution_current (void) |
| { |
| return target_has_execution_1 (inferior_ptid); |
| } |
| |
| /* This is used to implement the various target commands. */ |
| |
| static void |
| open_target (const char *args, int from_tty, struct cmd_list_element *command) |
| { |
| auto *ti = static_cast<target_info *> (get_cmd_context (command)); |
| target_open_ftype *func = target_factories[ti]; |
| |
| if (targetdebug) |
| fprintf_unfiltered (gdb_stdlog, "-> %s->open (...)\n", |
| ti->shortname); |
| |
| func (args, from_tty); |
| |
| if (targetdebug) |
| fprintf_unfiltered (gdb_stdlog, "<- %s->open (%s, %d)\n", |
| ti->shortname, args, from_tty); |
| } |
| |
| /* See target.h. */ |
| |
| void |
| add_target (const target_info &t, target_open_ftype *func, |
| completer_ftype *completer) |
| { |
| struct cmd_list_element *c; |
| |
| auto &func_slot = target_factories[&t]; |
| if (func_slot != nullptr) |
| internal_error (__FILE__, __LINE__, |
| _("target already added (\"%s\")."), t.shortname); |
| func_slot = func; |
| |
| 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.shortname, no_class, t.doc, &targetlist); |
| set_cmd_context (c, (void *) &t); |
| set_cmd_sfunc (c, open_target); |
| if (completer != NULL) |
| set_cmd_completer (c, completer); |
| } |
| |
| /* See target.h. */ |
| |
| void |
| add_deprecated_target_alias (const target_info &tinfo, const 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, tinfo.doc, &targetlist); |
| set_cmd_sfunc (c, open_target); |
| set_cmd_context (c, (void *) &tinfo); |
| alt = xstrprintf ("target %s", tinfo.shortname); |
| deprecate_cmd (c, alt); |
| } |
| |
| /* Stub functions */ |
| |
| void |
| target_kill (void) |
| { |
| current_top_target ()->kill (); |
| } |
| |
| void |
| target_load (const char *arg, int from_tty) |
| { |
| target_dcache_invalidate (); |
| current_top_target ()->load (arg, from_tty); |
| } |
| |
| /* Define it. */ |
| |
| target_terminal_state target_terminal::m_terminal_state |
| = target_terminal_state::is_ours; |
| |
| /* See target/target.h. */ |
| |
| void |
| target_terminal::init (void) |
| { |
| current_top_target ()->terminal_init (); |
| |
| m_terminal_state = target_terminal_state::is_ours; |
| } |
| |
| /* See target/target.h. */ |
| |
| void |
| target_terminal::inferior (void) |
| { |
| struct ui *ui = current_ui; |
| |
| /* A background resume (``run&'') should leave GDB in control of the |
| terminal. */ |
| if (ui->prompt_state != PROMPT_BLOCKED) |
| return; |
| |
| /* Since we always run the inferior in the main console (unless "set |
| inferior-tty" is in effect), when some UI other than the main one |
| calls target_terminal::inferior, then we leave the main UI's |
| terminal settings as is. */ |
| if (ui != main_ui) |
| return; |
| |
| /* If GDB is resuming the inferior in the foreground, install |
| inferior's terminal modes. */ |
| |
| struct inferior *inf = current_inferior (); |
| |
| if (inf->terminal_state != target_terminal_state::is_inferior) |
| { |
| current_top_target ()->terminal_inferior (); |
| inf->terminal_state = target_terminal_state::is_inferior; |
| } |
| |
| m_terminal_state = target_terminal_state::is_inferior; |
| |
| /* If the user hit C-c before, pretend that it was hit right |
| here. */ |
| if (check_quit_flag ()) |
| target_pass_ctrlc (); |
| } |
| |
| /* See target/target.h. */ |
| |
| void |
| target_terminal::restore_inferior (void) |
| { |
| struct ui *ui = current_ui; |
| |
| /* See target_terminal::inferior(). */ |
| if (ui->prompt_state != PROMPT_BLOCKED || ui != main_ui) |
| return; |
| |
| /* Restore the terminal settings of inferiors that were in the |
| foreground but are now ours_for_output due to a temporary |
| target_target::ours_for_output() call. */ |
| |
| { |
| scoped_restore_current_inferior restore_inferior; |
| |
| for (::inferior *inf : all_inferiors ()) |
| { |
| if (inf->terminal_state == target_terminal_state::is_ours_for_output) |
| { |
| set_current_inferior (inf); |
| current_top_target ()->terminal_inferior (); |
| inf->terminal_state = target_terminal_state::is_inferior; |
| } |
| } |
| } |
| |
| m_terminal_state = target_terminal_state::is_inferior; |
| |
| /* If the user hit C-c before, pretend that it was hit right |
| here. */ |
| if (check_quit_flag ()) |
| target_pass_ctrlc (); |
| } |
| |
| /* Switch terminal state to DESIRED_STATE, either is_ours, or |
| is_ours_for_output. */ |
| |
| static void |
| target_terminal_is_ours_kind (target_terminal_state desired_state) |
| { |
| scoped_restore_current_inferior restore_inferior; |
| |
| /* Must do this in two passes. First, have all inferiors save the |
| current terminal settings. Then, after all inferiors have add a |
| chance to safely save the terminal settings, restore GDB's |
| terminal settings. */ |
| |
| for (inferior *inf : all_inferiors ()) |
| { |
| if (inf->terminal_state == target_terminal_state::is_inferior) |
| { |
| set_current_inferior (inf); |
| current_top_target ()->terminal_save_inferior (); |
| } |
| } |
| |
| for (inferior *inf : all_inferiors ()) |
| { |
| /* Note we don't check is_inferior here like above because we |
| need to handle 'is_ours_for_output -> is_ours' too. Careful |
| to never transition from 'is_ours' to 'is_ours_for_output', |
| though. */ |
| if (inf->terminal_state != target_terminal_state::is_ours |
| && inf->terminal_state != desired_state) |
| { |
| set_current_inferior (inf); |
| if (desired_state == target_terminal_state::is_ours) |
| current_top_target ()->terminal_ours (); |
| else if (desired_state == target_terminal_state::is_ours_for_output) |
| current_top_target ()->terminal_ours_for_output (); |
| else |
| gdb_assert_not_reached ("unhandled desired state"); |
| inf->terminal_state = desired_state; |
| } |
| } |
| } |
| |
| /* See target/target.h. */ |
| |
| void |
| target_terminal::ours () |
| { |
| struct ui *ui = current_ui; |
| |
| /* See target_terminal::inferior. */ |
| if (ui != main_ui) |
| return; |
| |
| if (m_terminal_state == target_terminal_state::is_ours) |
| return; |
| |
| target_terminal_is_ours_kind (target_terminal_state::is_ours); |
| m_terminal_state = target_terminal_state::is_ours; |
| } |
| |
| /* See target/target.h. */ |
| |
| void |
| target_terminal::ours_for_output () |
| { |
| struct ui *ui = current_ui; |
| |
| /* See target_terminal::inferior. */ |
| if (ui != main_ui) |
| return; |
| |
| if (!target_terminal::is_inferior ()) |
| return; |
| |
| target_terminal_is_ours_kind (target_terminal_state::is_ours_for_output); |
| target_terminal::m_terminal_state = target_terminal_state::is_ours_for_output; |
| } |
| |
| /* See target/target.h. */ |
| |
| void |
| target_terminal::info (const char *arg, int from_tty) |
| { |
| current_top_target ()->terminal_info (arg, from_tty); |
| } |
| |
| /* See target.h. */ |
| |
| bool |
| target_supports_terminal_ours (void) |
| { |
| /* This can be called before there is any target, so we must check |
| for nullptr here. */ |
| target_ops *top = current_top_target (); |
| |
| if (top == nullptr) |
| return false; |
| return top->supports_terminal_ours (); |
| } |
| |
| static void |
| tcomplain (void) |
| { |
| error (_("You can't do that when your target is `%s'"), |
| current_top_target ()->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_t (inferior_ptid.pid (), 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"); |
| } |
| |
| /* See target.h. */ |
| |
| void |
| target_stack::push (target_ops *t) |
| { |
| /* If there's already a target at this stratum, remove it. */ |
| strata stratum = t->stratum (); |
| |
| if (m_stack[stratum] != NULL) |
| unpush (m_stack[stratum]); |
| |
| /* Now add the new one. */ |
| m_stack[stratum] = t; |
| |
| if (m_top < stratum) |
| m_top = stratum; |
| } |
| |
| /* See target.h. */ |
| |
| void |
| push_target (struct target_ops *t) |
| { |
| g_target_stack.push (t); |
| } |
| |
| /* See target.h */ |
| |
| void |
| push_target (target_ops_up &&t) |
| { |
| g_target_stack.push (t.get ()); |
| t.release (); |
| } |
| |
| /* See target.h. */ |
| |
| int |
| unpush_target (struct target_ops *t) |
| { |
| return g_target_stack.unpush (t); |
| } |
| |
| /* See target.h. */ |
| |
| bool |
| target_stack::unpush (target_ops *t) |
| { |
| gdb_assert (t != NULL); |
| |
| strata stratum = t->stratum (); |
| |
| if (stratum == dummy_stratum) |
| internal_error (__FILE__, __LINE__, |
| _("Attempt to unpush the dummy target")); |
| |
| /* Look for the specified target. Note that a target can only occur |
| once in the target stack. */ |
| |
| if (m_stack[stratum] != t) |
| { |
| /* If T wasn't pushed, quit. Only open targets should be |
| closed. */ |
| return false; |
| } |
| |
| /* Unchain the target. */ |
| m_stack[stratum] = NULL; |
| |
| if (m_top == stratum) |
| m_top = t->beneath ()->stratum (); |
| |
| /* 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 true; |
| } |
| |
| /* 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->shortname ()); |
| internal_error (__FILE__, __LINE__, |
| _("failed internal consistency check")); |
| } |
| } |
| |
| void |
| pop_all_targets_above (enum strata above_stratum) |
| { |
| while ((int) (current_top_target ()->stratum ()) > (int) above_stratum) |
| unpush_target_and_assert (current_top_target ()); |
| } |
| |
| /* See target.h. */ |
| |
| void |
| pop_all_targets_at_and_above (enum strata stratum) |
| { |
| while ((int) (current_top_target ()->stratum ()) >= (int) stratum) |
| unpush_target_and_assert (current_top_target ()); |
| } |
| |
| 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) |
| { |
| return g_target_stack.is_pushed (t); |
| } |
| |
| /* 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 = current_top_target (); |
| struct gdbarch *gdbarch = target_gdbarch (); |
| |
| if (gdbarch_fetch_tls_load_module_address_p (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 (gdbarch, |
| objfile); |
| |
| if (gdbarch_get_thread_local_address_p (gdbarch)) |
| addr = gdbarch_get_thread_local_address (gdbarch, ptid, lm_addr, |
| offset); |
| else |
| addr = target->get_thread_local_address (ptid, lm_addr, offset); |
| } |
| /* If an error occurred, print TLS related messages here. Otherwise, |
| throw the error to some higher catcher. */ |
| catch (const gdb_exception &ex) |
| { |
| 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).c_str ()); |
| 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).c_str ()); |
| 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).c_str (), |
| objfile_name (objfile), ex.what ()); |
| else |
| error (_("Cannot find thread-local storage for %s, " |
| "executable file %s:\n%s"), |
| target_pid_to_str (ptid).c_str (), |
| objfile_name (objfile), ex.what ()); |
| break; |
| default: |
| throw; |
| break; |
| } |
| } |
| } |
| 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, gdb::unique_xmalloc_ptr<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->reset (buffer); |
| if (errnop != NULL) |
| *errnop = errcode; |
| return nbytes_read; |
| } |
| |
| struct target_section_table * |
| target_get_section_table (struct target_ops *target) |
| { |
| return target->get_section_table (); |
| } |
| |
| /* 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->xfer_partial (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->has_all_memory ()) |
| 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 |
| && 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_section_flags (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 (inferior_ptid != null_ptid) |
| inf = current_inferior (); |
| 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; |
| |
| memaddr = address_significant (target_gdbarch (), memaddr); |
| |
| /* 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 |
| { |
| /* 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 a limit specified by the target |
| to mitigate this. */ |
| len = std::min (ops->get_memory_xfer_limit (), len); |
| |
| gdb::byte_vector buf (writebuf, writebuf + len); |
| breakpoint_xfer_memory (NULL, buf.data (), writebuf, memaddr, len); |
| res = memory_xfer_partial_1 (ops, object, NULL, buf.data (), memaddr, len, |
| xfered_len); |
| } |
| |
| return res; |
| } |
| |
| scoped_restore_tmpl<int> |
| make_scoped_restore_show_memory_breakpoints (int show) |
| { |
| return make_scoped_restore (&show_memory_breakpoints, show); |
| } |
| |
| /* 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; |
| |
| /* 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->xfer_partial (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->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) |
| { |
| if (target_read (current_top_target (), 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) |
| { |
| if (target_read (current_top_target (), 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) |
| { |
| if (target_read (current_top_target (), 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) |
| { |
| if (target_read (current_top_target (), 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) |
| { |
| if (target_write (current_top_target (), 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) |
| { |
| if (target_write (current_top_target (), TARGET_OBJECT_RAW_MEMORY, NULL, |
| myaddr, memaddr, len) == len) |
| return 0; |
| else |
| return -1; |
| } |
| |
| /* Fetch the target's memory map. */ |
| |
| std::vector<mem_region> |
| target_memory_map (void) |
| { |
| std::vector<mem_region> result = current_top_target ()->memory_map (); |
| if (result.empty ()) |
| return result; |
| |
| std::sort (result.begin (), result.end ()); |
| |
| /* Check that regions do not overlap. Simultaneously assign |
| a numbering for the "mem" commands to use to refer to |
| each region. */ |
| mem_region *last_one = NULL; |
| for (size_t ix = 0; ix < result.size (); ix++) |
| { |
| mem_region *this_one = &result[ix]; |
| this_one->number = ix; |
| |
| if (last_one != NULL && last_one->hi > this_one->lo) |
| { |
| warning (_("Overlapping regions in memory map: ignoring")); |
| return std::vector<mem_region> (); |
| } |
| |
| last_one = this_one; |
| } |
| |
| return result; |
| } |
| |
| void |
| target_flash_erase (ULONGEST address, LONGEST length) |
| { |
| current_top_target ()->flash_erase (address, length); |
| } |
| |
| void |
| target_flash_done (void) |
| { |
| current_top_target ()->flash_done (); |
| } |
| |
| 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, |
| std::vector<memory_read_result> *result) |
| { |
| ULONGEST current_begin = begin; |
| ULONGEST current_end = end; |
| int forward; |
| ULONGEST xfered_len; |
| |
| /* If we previously failed to read 1 byte, nothing can be done here. */ |
| if (end - begin <= 1) |
| return; |
| |
| gdb::unique_xmalloc_ptr<gdb_byte> buf ((gdb_byte *) xmalloc (end - begin)); |
| |
| /* 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.get (), begin, 1, &xfered_len) == TARGET_XFER_OK) |
| { |
| forward = 1; |
| ++current_begin; |
| } |
| else if (target_read_partial (ops, TARGET_OBJECT_MEMORY, NULL, |
| buf.get () + (end - begin) - 1, end - 1, 1, |
| &xfered_len) == TARGET_XFER_OK) |
| { |
| forward = 0; |
| --current_end; |
| } |
| else |
| 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.get () + (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. */ |
| result->emplace_back (begin, current_end, std::move (buf)); |
| } |
| else |
| { |
| /* The [current_end, end) range has been read. */ |
| LONGEST region_len = end - current_end; |
| |
| gdb::unique_xmalloc_ptr<gdb_byte> data |
| ((gdb_byte *) xmalloc (region_len * unit_size)); |
| memcpy (data.get (), buf.get () + (current_end - begin) * unit_size, |
| region_len * unit_size); |
| result->emplace_back (current_end, end, std::move (data)); |
| } |
| } |
| |
| std::vector<memory_read_result> |
| read_memory_robust (struct target_ops *ops, |
| const ULONGEST offset, const LONGEST len) |
| { |
| std::vector<memory_read_result> result; |
| 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 = std::min (len - xfered_total, region_len); |
| gdb::unique_xmalloc_ptr<gdb_byte> buffer |
| ((gdb_byte *) xmalloc (to_read * unit_size)); |
| |
| LONGEST xfered_partial = |
| target_read (ops, TARGET_OBJECT_MEMORY, NULL, buffer.get (), |
| 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. */ |
| read_whatever_is_readable (ops, offset + xfered_total, |
| offset + xfered_total + to_read, |
| unit_size, &result); |
| xfered_total += to_read; |
| } |
| else |
| { |
| result.emplace_back (offset + xfered_total, |
| offset + xfered_total + xfered_partial, |
| std::move (buffer)); |
| 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); |
| } |
| |
| /* Help for target_read_alloc and target_read_stralloc. See their comments |
| for details. */ |
| |
| template <typename T> |
| gdb::optional<gdb::def_vector<T>> |
| target_read_alloc_1 (struct target_ops *ops, enum target_object object, |
| const char *annex) |
| { |
| gdb::def_vector<T> buf; |
| size_t buf_pos = 0; |
| const int chunk = 4096; |
| |
| /* 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. */ |
| while (1) |
| { |
| ULONGEST xfered_len; |
| enum target_xfer_status status; |
| |
| buf.resize (buf_pos + chunk); |
| |
| status = target_read_partial (ops, object, annex, |
| (gdb_byte *) &buf[buf_pos], |
| buf_pos, chunk, |
| &xfered_len); |
| |
| if (status == TARGET_XFER_EOF) |
| { |
| /* Read all there was. */ |
| buf.resize (buf_pos); |
| return buf; |
| } |
| else if (status != TARGET_XFER_OK) |
| { |
| /* An error occurred. */ |
| return {}; |
| } |
| |
| buf_pos += xfered_len; |
| |
| QUIT; |
| } |
| } |
| |
| /* See target.h */ |
| |
| gdb::optional<gdb::byte_vector> |
| target_read_alloc (struct target_ops *ops, enum target_object object, |
| const char *annex) |
| { |
| return target_read_alloc_1<gdb_byte> (ops, object, annex); |
| } |
| |
| /* See target.h. */ |
| |
| gdb::optional<gdb::char_vector> |
| target_read_stralloc (struct target_ops *ops, enum target_object object, |
| const char *annex) |
| { |
| gdb::optional<gdb::char_vector> buf |
| = target_read_alloc_1<char> (ops, object, annex); |
| |
| if (!buf) |
| return {}; |
| |
| if (buf->empty () || buf->back () != '\0') |
| buf->push_back ('\0'); |
| |
| /* Check for embedded NUL bytes; but allow trailing NULs. */ |
| for (auto it = std::find (buf->begin (), buf->end (), '\0'); |
| it != buf->end (); it++) |
| if (*it != '\0') |
| { |
| warning (_("target object %d, annex %s, " |
| "contained unexpected null characters"), |
| (int) object, annex ? annex : "(none)"); |
| break; |
| } |
| |
| return buf; |
| } |
| |
| /* 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_top_target ()->insert_breakpoint (gdbarch, bp_tgt); |
| } |
| |
| /* See target.h. */ |
| |
| int |
| target_remove_breakpoint (struct gdbarch *gdbarch, |
| struct bp_target_info *bp_tgt, |
| enum remove_bp_reason reason) |
| { |
| /* 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_top_target ()->remove_breakpoint (gdbarch, bp_tgt, reason); |
| } |
| |
| static void |
| info_target_command (const char *args, int from_tty) |
| { |
| int has_all_mem = 0; |
| |
| if (symfile_objfile != NULL) |
| printf_unfiltered (_("Symbols from \"%s\".\n"), |
| objfile_name (symfile_objfile)); |
| |
| for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
| { |
| if (!t->has_memory ()) |
| continue; |
| |
| if ((int) (t->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->longname ()); |
| t->files_info (); |
| has_all_mem = t->has_all_memory (); |
| } |
| } |
| |
| /* 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) |
| { |
| /* Not all killed inferiors can, or will ever be, removed from the |
| inferior list. Killed inferiors clearly don't need to be killed |
| again, so, we're done. */ |
| if (inf->pid == 0) |
| return 0; |
| |
| thread_info *thread = any_thread_of_inferior (inf); |
| if (thread != NULL) |
| { |
| switch_to_thread (thread); |
| |
| /* Core inferiors actually should be detached, not killed. */ |
| if (target_has_execution) |
| target_kill (); |
| else |
| target_detach (inf, 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); |
| } |
| |
| /* See target.h. */ |
| |
| void |
| target_detach (inferior *inf, int from_tty) |
| { |
| /* After we have detached, we will clear the register cache for this inferior |
| by calling registers_changed_ptid. We must save the pid_ptid before |
| detaching, as the target detach method will clear inf->pid. */ |
| ptid_t save_pid_ptid = ptid_t (inf->pid); |
| |
| /* As long as some to_detach implementations rely on the current_inferior |
| (either directly, or indirectly, like through target_gdbarch or by |
| reading memory), INF needs to be the current inferior. When that |
| requirement will become no longer true, then we can remove this |
| assertion. */ |
| gdb_assert (inf == current_inferior ()); |
| |
| 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 |
| breakpoints before detaching. */ |
| remove_breakpoints_inf (current_inferior ()); |
| |
| prepare_for_detach (); |
| |
| current_top_target ()->detach (inf, from_tty); |
| |
| registers_changed_ptid (save_pid_ptid); |
| |
| /* We have to ensure we have no frame cache left. Normally, |
| registers_changed_ptid (save_pid_ptid) calls reinit_frame_cache when |
| inferior_ptid matches save_pid_ptid, but in our case, it does not |
| call it, as inferior_ptid has been reset. */ |
| reinit_frame_cache (); |
| } |
| |
| 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_top_target ()->disconnect (args, from_tty); |
| } |
| |
| /* See target/target.h. */ |
| |
| ptid_t |
| target_wait (ptid_t ptid, struct target_waitstatus *status, int options) |
| { |
| return current_top_target ()->wait (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; |
| } |
| |
| std::string |
| target_pid_to_str (ptid_t ptid) |
| { |
| return current_top_target ()->pid_to_str (ptid); |
| } |
| |
| const char * |
| target_thread_name (struct thread_info *info) |
| { |
| return current_top_target ()->thread_name (info); |
| } |
| |
| struct thread_info * |
| target_thread_handle_to_thread_info (const gdb_byte *thread_handle, |
| int handle_len, |
| struct inferior *inf) |
| { |
| return current_top_target ()->thread_handle_to_thread_info (thread_handle, |
| handle_len, inf); |
| } |
| |
| /* See target.h. */ |
| |
| gdb::byte_vector |
| target_thread_info_to_thread_handle (struct thread_info *tip) |
| { |
| return current_top_target ()->thread_info_to_thread_handle (tip); |
| } |
| |
| void |
| target_resume (ptid_t ptid, int step, enum gdb_signal signal) |
| { |
| target_dcache_invalidate (); |
| |
| current_top_target ()->resume (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. This also clears the |
| thread's stop_pc as side effect. */ |
| set_executing (ptid, 1); |
| clear_inline_frame_state (ptid); |
| } |
| |
| /* If true, target_commit_resume is a nop. */ |
| static int defer_target_commit_resume; |
| |
| /* See target.h. */ |
| |
| void |
| target_commit_resume (void) |
| { |
| if (defer_target_commit_resume) |
| return; |
| |
| current_top_target ()->commit_resume (); |
| } |
| |
| /* See target.h. */ |
| |
| scoped_restore_tmpl<int> |
| make_scoped_defer_target_commit_resume () |
| { |
| return make_scoped_restore (&defer_target_commit_resume, 1); |
| } |
| |
| void |
| target_pass_signals (gdb::array_view<const unsigned char> pass_signals) |
| { |
| current_top_target ()->pass_signals (pass_signals); |
| } |
| |
| void |
| target_program_signals (gdb::array_view<const unsigned char> program_signals) |
| { |
| current_top_target ()->program_signals (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_top_target ()->follow_fork (follow_child, detach_fork); |
| } |
| |
| /* Target wrapper for follow exec hook. */ |
| |
| void |
| target_follow_exec (struct inferior *inf, const char *execd_pathname) |
| { |
| current_top_target ()->follow_exec (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 (ptid_t ptid) |
| { |
| gdb_assert (ptid == inferior_ptid); |
| current_top_target ()->mourn_inferior (); |
| |
| /* 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->read_description (); |
| } |
| |
| /* 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. */ |
| unsigned search_buf_size; |
| |
| 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; |
| |
| gdb::byte_vector search_buf (search_buf_size); |
| |
| /* Prime the search buffer. */ |
| |
| if (target_read (ops, TARGET_OBJECT_MEMORY, NULL, |
| search_buf.data (), 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)); |
| 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 |
| = std::min (search_space_len, (ULONGEST) search_buf_size); |
| |
| found_ptr = (gdb_byte *) memmem (search_buf.data (), nr_search_bytes, |
| pattern, pattern_len); |
| |
| if (found_ptr != NULL) |
| { |
| CORE_ADDR found_addr = start_addr + (found_ptr - search_buf.data ()); |
| |
| *found_addrp = found_addr; |
| 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[0], &search_buf[chunk_size], keep_len); |
| |
| nr_to_read = std::min (search_space_len - keep_len, |
| (ULONGEST) 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)); |
| return -1; |
| } |
| |
| start_addr += chunk_size; |
| } |
| } |
| |
| /* Not found. */ |
| |
| 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_top_target (), |
| 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_top_target ()->search_memory (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) |
| { |
| for (target_ops *t = current_top_target (); 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->can_create_inferior ()) |
| 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->stratum () > process_stratum) |
| continue; |
| |
| error (_("The \"%s\" target does not support \"run\". " |
| "Try \"help target\" or \"continue\"."), |
| t->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 bool auto_connect_native_target = true; |
| |
| 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); |
| } |
| |
| /* A pointer to the target that can respond to "run" or "attach". |
| Native targets are always singletons and instantiated early at GDB |
| startup. */ |
| static target_ops *the_native_target; |
| |
| /* See target.h. */ |
| |
| void |
| set_native_target (target_ops *target) |
| { |
| if (the_native_target != NULL) |
| internal_error (__FILE__, __LINE__, |
| _("native target already set (\"%s\")."), |
| the_native_target->longname ()); |
| |
| the_native_target = target; |
| } |
| |
| /* See target.h. */ |
| |
| target_ops * |
| get_native_target () |
| { |
| return the_native_target; |
| } |
| |
| /* 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 (const char *do_mesg) |
| { |
| if (auto_connect_native_target && the_native_target != NULL) |
| return the_native_target; |
| |
| if (do_mesg != NULL) |
| error (_("Don't know how to %s. Try \"help target\"."), do_mesg); |
| return NULL; |
| } |
| |
| /* See target.h. */ |
| |
| struct target_ops * |
| find_attach_target (void) |
| { |
| /* If a target on the current stack can attach, use it. */ |
| for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
| { |
| if (t->can_attach ()) |
| return t; |
| } |
| |
| /* Otherwise, use the default run target for attaching. */ |
| return find_default_run_target ("attach"); |
| } |
| |
| /* See target.h. */ |
| |
| struct target_ops * |
| find_run_target (void) |
| { |
| /* If a target on the current stack can run, use it. */ |
| for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
| { |
| if (t->can_create_inferior ()) |
| return t; |
| } |
| |
| /* Otherwise, use the default run target. */ |
| return find_default_run_target ("run"); |
| } |
| |
| bool |
| target_ops::info_proc (const char *args, enum info_proc_what what) |
| { |
| return false; |
| } |
| |
| /* 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. */ |
| t = find_target_at (process_stratum); |
| if (t == NULL) |
| t = find_default_run_target (NULL); |
| |
| for (; t != NULL; t = t->beneath ()) |
| { |
| if (t->info_proc (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 != NULL) |
| return t->supports_disable_randomization (); |
| return 0; |
| } |
| |
| int |
| target_supports_disable_randomization (void) |
| { |
| return current_top_target ()->supports_disable_randomization (); |
| } |
| |
| /* See target/target.h. */ |
| |
| int |
| target_supports_multi_process (void) |
| { |
| return current_top_target ()->supports_multi_process (); |
| } |
| |
| /* See target.h. */ |
| |
| gdb::optional<gdb::char_vector> |
| 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. */ |
| t = find_target_at (process_stratum); |
| if (t == NULL) |
| t = find_default_run_target ("get OS data"); |
| |
| if (!t) |
| return {}; |
| |
| return target_read_stralloc (t, TARGET_OBJECT_OSDATA, type); |
| } |
| |
| |
| /* Determine the current address space of thread PTID. */ |
| |
| struct address_space * |
| target_thread_address_space (ptid_t ptid) |
| { |
| struct address_space *aspace; |
| |
| aspace = current_top_target ()->thread_address_space (ptid); |
| gdb_assert (aspace != NULL); |
| |
| return aspace; |
| } |
| |
| /* See target.h. */ |
| |
| target_ops * |
| target_ops::beneath () const |
| { |
| return g_target_stack.find_beneath (this); |
| } |
| |
| void |
| target_ops::close () |
| { |
| } |
| |
| bool |
| target_ops::can_attach () |
| { |
| return 0; |
| } |
| |
| void |
| target_ops::attach (const char *, int) |
| { |
| gdb_assert_not_reached ("target_ops::attach called"); |
| } |
| |
| bool |
| target_ops::can_create_inferior () |
| { |
| return 0; |
| } |
| |
| void |
| target_ops::create_inferior (const char *, const std::string &, |
| char **, int) |
| { |
| gdb_assert_not_reached ("target_ops::create_inferior called"); |
| } |
| |
| bool |
| target_ops::can_run () |
| { |
| return false; |
| } |
| |
| int |
| target_can_run () |
| { |
| for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
| { |
| if (t->can_run ()) |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| /* Target file operations. */ |
| |
| static struct target_ops * |
| default_fileio_target (void) |
| { |
| struct target_ops *t; |
| |
| /* If we're already connected to something that can perform |
| file I/O, use it. Otherwise, try using the native target. */ |
| t = find_target_at (process_stratum); |
| if (t != NULL) |
| return t; |
| return find_default_run_target ("file I/O"); |
| } |
| |
| /* File handle for target file operations. */ |
| |
| struct fileio_fh_t |
| { |
| /* The target on which this file is open. NULL if the target is |
| meanwhile closed while the handle is open. */ |
| target_ops *target; |
| |
| /* The file descriptor on the target. */ |
| int target_fd; |
| |
| /* Check whether this fileio_fh_t represents a closed file. */ |
| bool is_closed () |
| { |
| return target_fd < 0; |
| } |
| }; |
| |
| /* 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 std::vector<fileio_fh_t> fileio_fhandles; |
| |
| /* 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; |
| |
| /* Invalidate the target associated with open handles that were open |
| on target TARG, since we're about to close (and maybe destroy) the |
| target. The handles remain open from the client's perspective, but |
| trying to do anything with them other than closing them will fail |
| with EIO. */ |
| |
| static void |
| fileio_handles_invalidate_target (target_ops *targ) |
| { |
| for (fileio_fh_t &fh : fileio_fhandles) |
| if (fh.target == targ) |
| fh.target = NULL; |
| } |
| |
| /* Acquire a target fileio file descriptor. */ |
| |
| static int |
| acquire_fileio_fd (target_ops *target, int target_fd) |
| { |
| /* Search for closed handles to reuse. */ |
| for (; lowest_closed_fd < fileio_fhandles.size (); lowest_closed_fd++) |
| { |
| fileio_fh_t &fh = fileio_fhandles[lowest_closed_fd]; |
| |
| if (fh.is_closed ()) |
| break; |
| } |
| |
| /* Push a new handle if no closed handles were found. */ |
| if (lowest_closed_fd == fileio_fhandles.size ()) |
| fileio_fhandles.push_back (fileio_fh_t {target, target_fd}); |
| else |
| fileio_fhandles[lowest_closed_fd] = {target, target_fd}; |
| |
| /* Should no longer be marked closed. */ |
| gdb_assert (!fileio_fhandles[lowest_closed_fd].is_closed ()); |
| |
| /* 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->target_fd = -1; |
| lowest_closed_fd = std::min (lowest_closed_fd, fd); |
| } |
| |
| /* Return a pointer to the fileio_fhandle_t corresponding to FD. */ |
| |
| static fileio_fh_t * |
| fileio_fd_to_fh (int fd) |
| { |
| return &fileio_fhandles[fd]; |
| } |
| |
| |
| /* Default implementations of file i/o methods. We don't want these |
| to delegate automatically, because we need to know which target |
| supported the method, in order to call it directly from within |
| pread/pwrite, etc. */ |
| |
| int |
| target_ops::fileio_open (struct inferior *inf, const char *filename, |
| int flags, int mode, int warn_if_slow, |
| int *target_errno) |
| { |
| *target_errno = FILEIO_ENOSYS; |
| return -1; |
| } |
| |
| int |
| target_ops::fileio_pwrite (int fd, const gdb_byte *write_buf, int len, |
| ULONGEST offset, int *target_errno) |
| { |
| *target_errno = FILEIO_ENOSYS; |
| return -1; |
| } |
| |
| int |
| target_ops::fileio_pread (int fd, gdb_byte *read_buf, int len, |
| ULONGEST offset, int *target_errno) |
| { |
| *target_errno = FILEIO_ENOSYS; |
| return -1; |
| } |
| |
| int |
| target_ops::fileio_fstat (int fd, struct stat *sb, int *target_errno) |
| { |
| *target_errno = FILEIO_ENOSYS; |
| return -1; |
| } |
| |
| int |
| target_ops::fileio_close (int fd, int *target_errno) |
| { |
| *target_errno = FILEIO_ENOSYS; |
| return -1; |
| } |
| |
| int |
| target_ops::fileio_unlink (struct inferior *inf, const char *filename, |
| int *target_errno) |
| { |
| *target_errno = FILEIO_ENOSYS; |
| return -1; |
| } |
| |
| gdb::optional<std::string> |
| target_ops::fileio_readlink (struct inferior *inf, const char *filename, |
| int *target_errno) |
| { |
| *target_errno = FILEIO_ENOSYS; |
| return {}; |
| } |
| |
| /* 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) |
| { |
| for (target_ops *t = default_fileio_target (); t != NULL; t = t->beneath ()) |
| { |
| int fd = t->fileio_open (inf, filename, flags, mode, |
| warn_if_slow, target_errno); |
| |
| if (fd == -1 && *target_errno == FILEIO_ENOSYS) |
| continue; |
| |
| 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 (fh->is_closed ()) |
| *target_errno = EBADF; |
| else if (fh->target == NULL) |
| *target_errno = EIO; |
| else |
| ret = fh->target->fileio_pwrite (fh->target_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 (fh->is_closed ()) |
| *target_errno = EBADF; |
| else if (fh->target == NULL) |
| *target_errno = EIO; |
| else |
| ret = fh->target->fileio_pread (fh->target_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 (fh->is_closed ()) |
| *target_errno = EBADF; |
| else if (fh->target == NULL) |
| *target_errno = EIO; |
| else |
| ret = fh->target->fileio_fstat (fh->target_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 (fh->is_closed ()) |
| *target_errno = EBADF; |
| else |
| { |
| if (fh->target != NULL) |
| ret = fh->target->fileio_close (fh->target_fd, |
| target_errno); |
| else |
| ret = 0; |
| 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) |
| { |
| for (target_ops *t = default_fileio_target (); t != NULL; t = t->beneath ()) |
| { |
| int ret = t->fileio_unlink (inf, filename, target_errno); |
| |
| if (ret == -1 && *target_errno == FILEIO_ENOSYS) |
| continue; |
| |
| 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. */ |
| |
| gdb::optional<std::string> |
| target_fileio_readlink (struct inferior *inf, const char *filename, |
| int *target_errno) |
| { |
| for (target_ops *t = default_fileio_target (); t != NULL; t = t->beneath ()) |
| { |
| gdb::optional<std::string> ret |
| = t->fileio_readlink (inf, filename, target_errno); |
| |
| if (!ret.has_value () && *target_errno == FILEIO_ENOSYS) |
| continue; |
| |
| if (targetdebug) |
| fprintf_unfiltered (gdb_stdlog, |
| "target_fileio_readlink (%d,%s)" |
| " = %s (%d)\n", |
| inf == NULL ? 0 : inf->num, |
| filename, ret ? ret->c_str () : "(nil)", |
| ret ? 0 : *target_errno); |
| return ret; |
| } |
| |
| *target_errno = FILEIO_ENOSYS; |
| return {}; |
| } |
| |
| /* Like scoped_fd, but specific to target fileio. */ |
| |
| class scoped_target_fd |
| { |
| public: |
| explicit scoped_target_fd (int fd) noexcept |
| : m_fd (fd) |
| { |
| } |
| |
| ~scoped_target_fd () |
| { |
| if (m_fd >= 0) |
| { |
| int target_errno; |
| |
| target_fileio_close (m_fd, &target_errno); |
| } |
| } |
| |
| DISABLE_COPY_AND_ASSIGN (scoped_target_fd); |
| |
| int get () const noexcept |
| { |
| return m_fd; |
| } |
| |
| private: |
| int m_fd; |
| }; |
| |
| /* 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) |
| { |
| size_t buf_alloc, buf_pos; |
| gdb_byte *buf; |
| LONGEST n; |
| int target_errno; |
| |
| scoped_target_fd fd (target_fileio_open (inf, filename, FILEIO_O_RDONLY, |
| 0700, &target_errno)); |
| if (fd.get () == -1) |
| return -1; |
| |
| /* 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.get (), &buf[buf_pos], |
| buf_alloc - buf_pos - padding, buf_pos, |
| &target_errno); |
| if (n < 0) |
| { |
| /* An error occurred. */ |
| xfree (buf); |
| return -1; |
| } |
| else if (n == 0) |
| { |
| /* Read all there was. */ |
| 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. */ |
| |
| gdb::unique_xmalloc_ptr<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 gdb::unique_xmalloc_ptr<char> (nullptr); |
| |
| if (transferred == 0) |
| return make_unique_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 gdb::unique_xmalloc_ptr<char> (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; |
| } |
| |
| /* See target.h. */ |
| |
| target_ops * |
| target_stack::find_beneath (const target_ops *t) const |
| { |
| /* Look for a non-empty slot at stratum levels beneath T's. */ |
| for (int stratum = t->stratum () - 1; stratum >= 0; --stratum) |
| if (m_stack[stratum] != NULL) |
| return m_stack[stratum]; |
| |
| return NULL; |
| } |
| |
| /* See target.h. */ |
| |
| struct target_ops * |
| find_target_at (enum strata stratum) |
| { |
| return g_target_stack.at (stratum); |
| } |
| |
| |
| |
| /* See target.h */ |
| |
| void |
| target_announce_detach (int from_tty) |
| { |
| pid_t pid; |
| const char *exec_file; |
| |
| if (!from_tty) |
| return; |
| |
| exec_file = get_exec_file (0); |
| if (exec_file == NULL) |
| exec_file = ""; |
| |
| pid = inferior_ptid.pid (); |
| printf_unfiltered (_("Detaching from program: %s, %s\n"), exec_file, |
| target_pid_to_str (ptid_t (pid)).c_str ()); |
| } |
| |
| /* The inferior process has died. Long live the inferior! */ |
| |
| void |
| generic_mourn_inferior (void) |
| { |
| inferior *inf = current_inferior (); |
| |
| 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 (inf->pid != 0) |
| exit_inferior (inf); |
| |
| /* 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. */ |
| |
| std::string |
| normal_pid_to_str (ptid_t ptid) |
| { |
| return string_printf ("process %d", ptid.pid ()); |
| } |
| |
| static std::string |
| 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; |
| } |
| |
| #include "target-delegates.c" |
| |
| /* The initial current target, so that there is always a semi-valid |
| current target. */ |
| |
| static dummy_target the_dummy_target; |
| |
| static const target_info dummy_target_info = { |
| "None", |
| N_("None"), |
| "" |
| }; |
| |
| strata |
| dummy_target::stratum () const |
| { |
| return dummy_stratum; |
| } |
| |
| strata |
| debug_target::stratum () const |
| { |
| return debug_stratum; |
| } |
| |
| const target_info & |
| dummy_target::info () const |
| { |
| return dummy_target_info; |
| } |
| |
| const target_info & |
| debug_target::info () const |
| { |
| return beneath ()->info (); |
| } |
| |
| |
| |
| void |
| target_close (struct target_ops *targ) |
| { |
| gdb_assert (!target_is_pushed (targ)); |
| |
| fileio_handles_invalidate_target (targ); |
| |
| targ->close (); |
| |
| if (targetdebug) |
| fprintf_unfiltered (gdb_stdlog, "target_close ()\n"); |
| } |
| |
| int |
| target_thread_alive (ptid_t ptid) |
| { |
| return current_top_target ()->thread_alive (ptid); |
| } |
| |
| void |
| target_update_thread_list (void) |
| { |
| current_top_target ()->update_thread_list (); |
| } |
| |
| void |
| target_stop (ptid_t ptid) |
| { |
| if (!may_stop) |
| { |
| warning (_("May not interrupt or stop the target, ignoring attempt")); |
| return; |
| } |
| |
| current_top_target ()->stop (ptid); |
| } |
| |
| void |
| target_interrupt () |
| { |
| if (!may_stop) |
| { |
| warning (_("May not interrupt or stop the target, ignoring attempt")); |
| return; |
| } |
| |
| current_top_target ()->interrupt (); |
| } |
| |
| /* See target.h. */ |
| |
| void |
| target_pass_ctrlc (void) |
| { |
| current_top_target ()->pass_ctrlc (); |
| } |
| |
| /* See target.h. */ |
| |
| void |
| default_target_pass_ctrlc (struct target_ops *ops) |
| { |
| target_interrupt (); |
| } |
| |
| /* See target/target.h. */ |
| |
| void |
| target_stop_and_wait (ptid_t ptid) |
| { |
| struct target_waitstatus status; |
| bool was_non_stop = non_stop; |
| |
| non_stop = true; |
| 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); |
| } |
| |
| /* See target/target.h. */ |
| |
| void |
| target_continue (ptid_t ptid, enum gdb_signal signal) |
| { |
| target_resume (ptid, 0, signal); |
| } |
| |
| /* Concatenate ELEM to LIST, a comma-separated list. */ |
| |
| static void |
| str_comma_list_concat_elem (std::string *list, const char *elem) |
| { |
| if (!list->empty ()) |
| list->append (", "); |
| |
| list->append (elem); |
| } |
| |
| /* Helper for target_options_to_string. If OPT is present in |
| TARGET_OPTIONS, append the OPT_STR (string version of OPT) in RET. |
| OPT is removed from TARGET_OPTIONS. */ |
| |
| static void |
| do_option (int *target_options, std::string *ret, |
| int opt, const char *opt_str) |
| { |
| if ((*target_options & opt) != 0) |
| { |
| str_comma_list_concat_elem (ret, opt_str); |
| *target_options &= ~opt; |
| } |
| } |
| |
| /* See target.h. */ |
| |
| std::string |
| target_options_to_string (int target_options) |
| { |
| std::string ret; |
| |
| #define DO_TARG_OPTION(OPT) \ |
| do_option (&target_options, &ret, OPT, #OPT) |
| |
| DO_TARG_OPTION (TARGET_WNOHANG); |
| |
| if (target_options != 0) |
| str_comma_list_concat_elem (&ret, "unknown???"); |
| |
| return ret; |
| } |
| |
| void |
| target_fetch_registers (struct regcache *regcache, int regno) |
| { |
| current_top_target ()->fetch_registers (regcache, regno); |
| if (targetdebug) |
| regcache->debug_print_register ("target_fetch_registers", regno); |
| } |
| |
| void |
| target_store_registers (struct regcache *regcache, int regno) |
| { |
| if (!may_write_registers) |
| error (_("Writing to registers is not allowed (regno %d)"), regno); |
| |
| current_top_target ()->store_registers (regcache, regno); |
| if (targetdebug) |
| { |
| regcache->debug_print_register ("target_store_registers", regno); |
| } |
| } |
| |
| int |
| target_core_of_thread (ptid_t ptid) |
| { |
| return current_top_target ()->core_of_thread (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 = std::min<ULONGEST> (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_top_target (), |
| data, memaddr, size); |
| } |
| |
| int |
| target_verify_memory (const gdb_byte *data, CORE_ADDR memaddr, ULONGEST size) |
| { |
| return current_top_target ()->verify_memory (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_top_target ()->insert_mask_watchpoint (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_top_target ()->remove_mask_watchpoint (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_top_target ()->masked_watch_num_registers (addr, mask); |
| } |
| |
| /* The documentation for this function is in its prototype declaration |
| in target.h. */ |
| |
| int |
| target_ranged_break_num_registers (void) |
| { |
| return current_top_target ()->ranged_break_num_registers (); |
| } |
| |
| /* See target.h. */ |
| |
| struct btrace_target_info * |
| target_enable_btrace (ptid_t ptid, const struct btrace_config *conf) |
| { |
| return current_top_target ()->enable_btrace (ptid, conf); |
| } |
| |
| /* See target.h. */ |
| |
| void |
| target_disable_btrace (struct btrace_target_info *btinfo) |
| { |
| current_top_target ()->disable_btrace (btinfo); |
| } |
| |
| /* See target.h. */ |
| |
| void |
| target_teardown_btrace (struct btrace_target_info *btinfo) |
| { |
| current_top_target ()->teardown_btrace (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_top_target ()->read_btrace (btrace, btinfo, type); |
| } |
| |
| /* See target.h. */ |
| |
| const struct btrace_config * |
| target_btrace_conf (const struct btrace_target_info *btinfo) |
| { |
| return current_top_target ()->btrace_conf (btinfo); |
| } |
| |
| /* See target.h. */ |
| |
| void |
| target_stop_recording (void) |
| { |
| current_top_target ()->stop_recording (); |
| } |
| |
| /* See target.h. */ |
| |
| void |
| target_save_record (const char *filename) |
| { |
| current_top_target ()->save_record (filename); |
| } |
| |
| /* See target.h. */ |
| |
| int |
| target_supports_delete_record () |
| { |
| return current_top_target ()->supports_delete_record (); |
| } |
| |
| /* See target.h. */ |
| |
| void |
| target_delete_record (void) |
| { |
| current_top_target ()->delete_record (); |
| } |
| |
| /* See target.h. */ |
| |
| enum record_method |
| target_record_method (ptid_t ptid) |
| { |
| return current_top_target ()->record_method (ptid); |
| } |
| |
| /* See target.h. */ |
| |
| int |
| target_record_is_replaying (ptid_t ptid) |
| { |
| return current_top_target ()->record_is_replaying (ptid); |
| } |
| |
| /* See target.h. */ |
| |
| int |
| target_record_will_replay (ptid_t ptid, int dir) |
| { |
| return current_top_target ()->record_will_replay (ptid, dir); |
| } |
| |
| /* See target.h. */ |
| |
| void |
| target_record_stop_replaying (void) |
| { |
| current_top_target ()->record_stop_replaying (); |
| } |
| |
| /* See target.h. */ |
| |
| void |
| target_goto_record_begin (void) |
| { |
| current_top_target ()->goto_record_begin (); |
| } |
| |
| /* See target.h. */ |
| |
| void |
| target_goto_record_end (void) |
| { |
| current_top_target ()->goto_record_end (); |
| } |
| |
| /* See target.h. */ |
| |
| void |
| target_goto_record (ULONGEST insn) |
| { |
| current_top_target ()->goto_record (insn); |
| } |
| |
| /* See target.h. */ |
| |
| void |
| target_insn_history (int size, gdb_disassembly_flags flags) |
| { |
| current_top_target ()->insn_history (size, flags); |
| } |
| |
| /* See target.h. */ |
| |
| void |
| target_insn_history_from (ULONGEST from, int size, |
| gdb_disassembly_flags flags) |
| { |
| current_top_target ()->insn_history_from (from, size, flags); |
| } |
| |
| /* See target.h. */ |
| |
| void |
| target_insn_history_range (ULONGEST begin, ULONGEST end, |
| gdb_disassembly_flags flags) |
| { |
| current_top_target ()->insn_history_range (begin, end, flags); |
| } |
| |
| /* See target.h. */ |
| |
| void |
| target_call_history (int size, record_print_flags flags) |
| { |
| current_top_target ()->call_history (size, flags); |
| } |
| |
| /* See target.h. */ |
| |
| void |
| target_call_history_from (ULONGEST begin, int size, record_print_flags flags) |
| { |
| current_top_target ()->call_history_from (begin, size, flags); |
| } |
| |
| /* See target.h. */ |
| |
| void |
| target_call_history_range (ULONGEST begin, ULONGEST end, record_print_flags flags) |
| { |
| current_top_target ()->call_history_range (begin, end, flags); |
| } |
| |
| /* See target.h. */ |
| |
| const struct frame_unwind * |
| target_get_unwinder (void) |
| { |
| return current_top_target ()->get_unwinder (); |
| } |
| |
| /* See target.h. */ |
| |
| const struct frame_unwind * |
| target_get_tailcall_unwinder (void) |
| { |
| return current_top_target ()->get_tailcall_unwinder (); |
| } |
| |
| /* See target.h. */ |
| |
| void |
| target_prepare_to_generate_core (void) |
| { |
| current_top_target ()->prepare_to_generate_core (); |
| } |
| |
| /* See target.h. */ |
| |
| void |
| target_done_generating_core (void) |
| { |
| current_top_target ()->done_generating_core (); |
| } |
| |
| |
| |
| 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 (const char *cmd, int from_tty) |
| { |
| target_rcmd (cmd, gdb_stdtarg); |
| } |
| |
| /* Erases all the memory regions marked as flash. CMD and FROM_TTY are |
| ignored. */ |
| |
| void |
| flash_erase_command (const char *cmd, int from_tty) |
| { |
| /* Used to communicate termination of flash operations to the target. */ |
| bool found_flash_region = false; |
| struct gdbarch *gdbarch = target_gdbarch (); |
| |
| std::vector<mem_region> mem_regions = target_memory_map (); |
| |
| /* Iterate over all memory regions. */ |
| for (const mem_region &m : mem_regions) |
| { |
| /* Is this a flash memory region? */ |
| if (m.attrib.mode == MEM_FLASH) |
| { |
| found_flash_region = true; |
| target_flash_erase (m.lo, m.hi - m.lo); |
| |
| ui_out_emit_tuple tuple_emitter (current_uiout, "erased-regions"); |
| |
| current_uiout->message (_("Erasing flash memory region at address ")); |
| current_uiout->field_core_addr ("address", gdbarch, m.lo); |
| current_uiout->message (", size = "); |
| current_uiout->field_string ("size", hex_string (m.hi - m.lo)); |
| current_uiout->message ("\n"); |
| } |
| } |
| |
| /* Did we do any flash operations? If so, we need to finalize them. */ |
| if (found_flash_region) |
| target_flash_done (); |
| else |
| current_uiout->message (_("No flash memory regions found.\n")); |
| } |
| |
| /* Print the name of each layers of our target stack. */ |
| |
| static void |
| maintenance_print_target_stack (const char *cmd, int from_tty) |
| { |
| printf_filtered (_("The current target stack is:\n")); |
| |
| for (target_ops *t = current_top_target (); t != NULL; t = t->beneath ()) |
| { |
| if (t->stratum () == debug_stratum) |
| continue; |
| printf_filtered (" - %s (%s)\n", t->shortname (), t->longname ()); |
| } |
| } |
| |
| /* See target.h. */ |
| |
| void |
| target_async (int enable) |
| { |
| infrun_async (enable); |
| current_top_target ()->async (enable); |
| } |
| |
| /* See target.h. */ |
| |
| void |
| target_thread_events (int enable) |
| { |
| current_top_target ()->thread_events (enable); |
| } |
| |
| /* Controls if targets can report that they can/are async. This is |
| just for maintainers to use when debugging gdb. */ |
| bool target_async_permitted = true; |
| |
| /* The set command writes to this variable. If the inferior is |
| executing, target_async_permitted is *not* updated. */ |
| static bool target_async_permitted_1 = true; |
| |
| static void |
| maint_set_target_async_command (const 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_top_target ()->always_non_stop_p (); |
| } |
| |
| /* 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 (const 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 bool may_write_registers_1 = true; |
| static bool may_write_memory_1 = true; |
| static bool may_insert_breakpoints_1 = true; |
| static bool may_insert_tracepoints_1 = true; |
| static bool may_insert_fast_tracepoints_1 = true; |
| static bool may_stop_1 = true; |
| |
| /* 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 (const 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 (const 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) |
| { |
| push_target (&the_dummy_target); |
| |
| the_debug_target = new debug_target (); |
| |
| add_info ("target", info_target_command, targ_desc); |
| add_info ("files", info_target_command, 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_com ("flash-erase", no_class, flash_erase_command, |
| _("Erase all flash memory regions.")); |
| |
| 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); |
| } |