/* Variables that describe the inferior process running under GDB:
Where it is, why it stopped, and how to step it.
- Copyright (C) 1986 Free Software Foundation, Inc.
-GDB is distributed in the hope that it will be useful, but WITHOUT ANY
-WARRANTY. No author or distributor accepts responsibility to anyone
-for the consequences of using it or for whether it serves any
-particular purpose or works at all, unless he says so in writing.
-Refer to the GDB General Public License for full details.
+ Copyright 1986, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
+ 1996, 1998, 1999, 2000, 2001, 2003 Free Software Foundation, Inc.
-Everyone is granted permission to copy, modify and redistribute GDB,
-but only under the conditions described in the GDB General Public
-License. A copy of this license is supposed to have been given to you
-along with GDB so you can know your rights and responsibilities. It
-should be in a file named COPYING. Among other things, the copyright
-notice and this notice must be preserved on all copies.
+ This file is part of GDB.
-In other words, go ahead and share GDB, but don't try to stop
-anyone else from sharing it farther. Help stamp out software hoarding!
-*/
+ 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 2 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, write to the Free Software
+ Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#if !defined (INFERIOR_H)
+#define INFERIOR_H 1
+
+struct target_waitstatus;
+struct frame_info;
+struct ui_file;
+struct type;
+struct gdbarch;
+struct regcache;
+
+/* For bpstat. */
+#include "breakpoint.h"
+
+/* For enum target_signal. */
+#include "target.h"
+
+/* For struct frame_id. */
+#include "frame.h"
+
+/* Structure in which to save the status of the inferior. Create/Save
+ through "save_inferior_status", restore through
+ "restore_inferior_status".
+
+ This pair of routines should be called around any transfer of
+ control to the inferior which you don't want showing up in your
+ control variables. */
+
+struct inferior_status;
+
+extern struct inferior_status *save_inferior_status (int);
+
+extern void restore_inferior_status (struct inferior_status *);
+
+extern struct cleanup *make_cleanup_restore_inferior_status (struct inferior_status *);
+
+extern void discard_inferior_status (struct inferior_status *);
+
+extern void write_inferior_status_register (struct inferior_status
+ *inf_status, int regno,
+ LONGEST val);
+
+/* The -1 ptid, often used to indicate either an error condition
+ or a "don't care" condition, i.e, "run all threads." */
+extern ptid_t minus_one_ptid;
+
+/* The null or zero ptid, often used to indicate no process. */
+extern ptid_t null_ptid;
+
+/* Attempt to find and return an existing ptid with the given PID, LWP,
+ and TID components. If none exists, create a new one and return
+ that. */
+ptid_t ptid_build (int pid, long lwp, long tid);
+
+/* Find/Create a ptid from just a pid. */
+ptid_t pid_to_ptid (int pid);
+
+/* Fetch the pid (process id) component from a ptid. */
+int ptid_get_pid (ptid_t ptid);
+
+/* Fetch the lwp (lightweight process) component from a ptid. */
+long ptid_get_lwp (ptid_t ptid);
+
+/* Fetch the tid (thread id) component from a ptid. */
+long ptid_get_tid (ptid_t ptid);
+
+/* Compare two ptids to see if they are equal */
+extern int ptid_equal (ptid_t p1, ptid_t p2);
+
+/* Save value of inferior_ptid so that it may be restored by
+ a later call to do_cleanups(). Returns the struct cleanup
+ pointer needed for later doing the cleanup. */
+extern struct cleanup * save_inferior_ptid (void);
+
+extern void set_sigint_trap (void);
+
+extern void clear_sigint_trap (void);
+
+extern void set_sigio_trap (void);
+
+extern void clear_sigio_trap (void);
/* File name for default use for standard in/out in the inferior. */
extern char *inferior_io_terminal;
-/* Pid of our debugged inferior, or 0 if no inferior now. */
+/* Collected pid, tid, etc. of the debugged inferior. When there's
+ no inferior, PIDGET (inferior_ptid) will be 0. */
+
+extern ptid_t inferior_ptid;
+
+/* Is the inferior running right now, as a result of a 'run&',
+ 'continue&' etc command? This is used in asycn gdb to determine
+ whether a command that the user enters while the target is running
+ is allowed or not. */
+extern int target_executing;
+
+/* Are we simulating synchronous execution? This is used in async gdb
+ to implement the 'run', 'continue' etc commands, which will not
+ redisplay the prompt until the execution is actually over. */
+extern int sync_execution;
+
+/* This is only valid when inferior_ptid is non-zero.
+
+ If this is 0, then exec events should be noticed and responded to
+ by the debugger (i.e., be reported to the user).
+
+ If this is > 0, then that many subsequent exec events should be
+ ignored (i.e., not be reported to the user).
+ */
+extern int inferior_ignoring_startup_exec_events;
+
+/* This is only valid when inferior_ignoring_startup_exec_events is
+ zero.
+
+ Some targets (stupidly) report more than one exec event per actual
+ call to an event() system call. If only the last such exec event
+ need actually be noticed and responded to by the debugger (i.e.,
+ be reported to the user), then this is the number of "leading"
+ exec events which should be ignored.
+ */
+extern int inferior_ignoring_leading_exec_events;
+
+/* Inferior environment. */
+
+extern struct environ *inferior_environ;
+
+extern void clear_proceed_status (void);
+
+extern void proceed (CORE_ADDR, enum target_signal, int);
+
+/* When set, stop the 'step' command if we enter a function which has
+ no line number information. The normal behavior is that we step
+ over such function. */
+extern int step_stop_if_no_debug;
+
+extern void kill_inferior (void);
+
+extern void generic_mourn_inferior (void);
+
+extern void terminal_save_ours (void);
+
+extern void terminal_ours (void);
+
+extern int run_stack_dummy (CORE_ADDR , struct regcache *);
+
+extern CORE_ADDR read_pc (void);
+
+extern CORE_ADDR read_pc_pid (ptid_t);
+
+extern CORE_ADDR generic_target_read_pc (ptid_t);
+
+extern void write_pc (CORE_ADDR);
+
+extern void write_pc_pid (CORE_ADDR, ptid_t);
+
+extern void generic_target_write_pc (CORE_ADDR, ptid_t);
+
+extern CORE_ADDR read_sp (void);
+
+extern CORE_ADDR generic_target_read_sp (void);
+
+extern void generic_target_write_sp (CORE_ADDR);
+
+extern CORE_ADDR read_fp (void);
+
+extern CORE_ADDR generic_target_read_fp (void);
+
+extern CORE_ADDR unsigned_pointer_to_address (struct type *type, const void *buf);
+
+extern void unsigned_address_to_pointer (struct type *type, void *buf,
+ CORE_ADDR addr);
+extern CORE_ADDR signed_pointer_to_address (struct type *type,
+ const void *buf);
+extern void address_to_signed_pointer (struct type *type, void *buf,
+ CORE_ADDR addr);
+
+extern void wait_for_inferior (void);
+
+extern void fetch_inferior_event (void *);
+
+extern void init_wait_for_inferior (void);
+
+extern void close_exec_file (void);
+
+extern void reopen_exec_file (void);
+
+/* The `resume' routine should only be called in special circumstances.
+ Normally, use `proceed', which handles a lot of bookkeeping. */
+
+extern void resume (int, enum target_signal);
+
+/* From misc files */
+
+extern void default_print_registers_info (struct gdbarch *gdbarch,
+ struct ui_file *file,
+ struct frame_info *frame,
+ int regnum, int all);
+
+extern void store_inferior_registers (int);
+
+extern void fetch_inferior_registers (int);
+
+extern void solib_create_inferior_hook (void);
-extern int inferior_pid;
+extern void child_terminal_info (char *, int);
+
+extern void term_info (char *, int);
+
+extern void terminal_ours_for_output (void);
+
+extern void terminal_inferior (void);
+
+extern void terminal_init_inferior (void);
+
+extern void terminal_init_inferior_with_pgrp (int pgrp);
+
+/* From infptrace.c or infttrace.c */
+
+extern int attach (int);
+
+extern void detach (int);
+
+/* PTRACE method of waiting for inferior process. */
+int ptrace_wait (ptid_t, int *);
+
+extern void child_resume (ptid_t, int, enum target_signal);
+
+#ifndef PTRACE_ARG3_TYPE
+#define PTRACE_ARG3_TYPE int /* Correct definition for most systems. */
+#endif
+
+extern int call_ptrace (int, int, PTRACE_ARG3_TYPE, int);
+
+extern void pre_fork_inferior (void);
+
+/* From procfs.c */
+
+extern int proc_iterate_over_mappings (int (*)(int, CORE_ADDR));
+
+extern ptid_t procfs_first_available (void);
+
+/* From fork-child.c */
+
+extern void fork_inferior (char *, char *, char **,
+ void (*)(void),
+ void (*)(int), void (*)(void), char *);
+
+
+extern void startup_inferior (int);
+
+extern char *construct_inferior_arguments (struct gdbarch *, int, char **);
+
+/* From inflow.c */
+
+extern void new_tty_prefork (char *);
+
+extern int gdb_has_a_terminal (void);
+
+/* From infrun.c */
+
+extern void start_remote (void);
+
+extern void normal_stop (void);
+
+extern int signal_stop_state (int);
+
+extern int signal_print_state (int);
+
+extern int signal_pass_state (int);
+
+extern int signal_stop_update (int, int);
+
+extern int signal_print_update (int, int);
+
+extern int signal_pass_update (int, int);
+
+extern void get_last_target_status(ptid_t *ptid,
+ struct target_waitstatus *status);
+
+extern void follow_inferior_reset_breakpoints (void);
+
+/* From infcmd.c */
+
+extern void tty_command (char *, int);
+
+extern void attach_command (char *, int);
+
+extern char *get_inferior_args (void);
+
+extern char *set_inferior_args (char *);
+
+extern void set_inferior_args_vector (int, char **);
+
+extern void registers_info (char *, int);
+
+extern void nexti_command (char *, int);
+
+extern void stepi_command (char *, int);
+
+extern void continue_command (char *, int);
+
+extern void interrupt_target_command (char *args, int from_tty);
/* Last signal that the inferior received (why it stopped). */
-extern int stop_signal;
+extern enum target_signal stop_signal;
/* Address at which inferior stopped. */
extern CORE_ADDR stop_pc;
-/* Stack frame when program stopped. */
+/* Chain containing status of breakpoint(s) that we have stopped at. */
-extern FRAME stop_frame;
+extern bpstat stop_bpstat;
-/* Number of breakpoint it stopped at, or 0 if none. */
+/* Flag indicating that a command has proceeded the inferior past the
+ current breakpoint. */
-extern int stop_breakpoint;
+extern int breakpoint_proceeded;
/* Nonzero if stopped due to a step command. */
extern int stop_stack_dummy;
+/* Nonzero if program stopped due to a random (unexpected) signal in
+ inferior process. */
+
+extern int stopped_by_random_signal;
+
/* Range to single step within.
If this is nonzero, respond to a single-step signal
- by continuing to step if the pc is in this range. */
+ by continuing to step if the pc is in this range.
-extern CORE_ADDR step_range_start; /* Inclusive */
-extern CORE_ADDR step_range_end; /* Exclusive */
+ If step_range_start and step_range_end are both 1, it means to step for
+ a single instruction (FIXME: it might clean up wait_for_inferior in a
+ minor way if this were changed to the address of the instruction and
+ that address plus one. But maybe not.). */
+
+extern CORE_ADDR step_range_start; /* Inclusive */
+extern CORE_ADDR step_range_end; /* Exclusive */
/* Stack frame address as of when stepping command was issued.
This is how we know when we step into a subroutine call,
and how to set the frame for the breakpoint used to step out. */
-extern CORE_ADDR step_frame;
+extern struct frame_id step_frame_id;
+
+/* Our notion of the current stack pointer. */
+
+extern CORE_ADDR step_sp;
/* 1 means step over all subroutine calls.
-1 means step over calls to undebuggable functions. */
-extern int step_over_calls;
+enum step_over_calls_kind
+ {
+ STEP_OVER_NONE,
+ STEP_OVER_ALL,
+ STEP_OVER_UNDEBUGGABLE
+ };
+
+extern enum step_over_calls_kind step_over_calls;
/* If stepping, nonzero means step count is > 1
so don't print frame next time inferior stops
extern int step_multi;
-/* Save register contents here when about to pop a stack dummy frame. */
+/* Nonzero means expecting a trap and caller will handle it
+ themselves. It is used when running in the shell before the child
+ program has been exec'd; and when running some kinds of remote
+ stuff (FIXME?). */
+
+/* It is also used after attach, due to attaching to a process. This
+ is a bit trickier. When doing an attach, the kernel stops the
+ debuggee with a SIGSTOP. On newer GNU/Linux kernels (>= 2.5.61)
+ the handling of SIGSTOP for a ptraced process has changed. Earlier
+ versions of the kernel would ignore these SIGSTOPs, while now
+ SIGSTOP is treated like any other signal, i.e. it is not muffled.
+
+ If the gdb user does a 'continue' after the 'attach', gdb passes
+ the global variable stop_signal (which stores the signal from the
+ attach, SIGSTOP) to the ptrace(PTRACE_CONT,...) call. This is
+ problematic, because the kernel doesn't ignore such SIGSTOP
+ now. I.e. it is reported back to gdb, which in turn presents it
+ back to the user.
+
+ To avoid the problem, we use STOP_QUIETLY_NO_SIGSTOP, which allows
+ gdb to clear the value of stop_signal after the attach, so that it
+ is not passed back down to the kernel. */
+
+enum stop_kind
+ {
+ NO_STOP_QUIETLY = 0,
+ STOP_QUIETLY,
+ STOP_QUIETLY_NO_SIGSTOP
+ };
+
+extern enum stop_kind stop_soon;
+
+/* Nonzero if proceed is being used for a "finish" command or a similar
+ situation when stop_registers should be saved. */
+
+extern int proceed_to_finish;
+
+/* Save register contents here when about to pop a stack dummy frame,
+ if-and-only-if proceed_to_finish is set.
+ Thus this contains the return value from the called function (assuming
+ values are returned in a register). */
+
+extern struct regcache *stop_registers;
+
+/* Nonzero if the child process in inferior_ptid was attached rather
+ than forked. */
+
+extern int attach_flag;
+\f
+/* Possible values for CALL_DUMMY_LOCATION. */
+#define ON_STACK 1
+#define AT_ENTRY_POINT 4
+
+/* FIXME: cagney/2000-04-17: gdbarch should manage this. The default
+ shouldn't be necessary. */
+
+#if !defined PUSH_DUMMY_FRAME
+#define PUSH_DUMMY_FRAME (internal_error (__FILE__, __LINE__, "PUSH_DUMMY_FRAME"), 0)
+#endif
+
+#if !defined STORE_STRUCT_RETURN
+#define STORE_STRUCT_RETURN(a1,a2) (internal_error (__FILE__, __LINE__, "STORE_STRUCT_RETURN"), 0)
+#endif
+
+
+/* Are we in a call dummy? */
+
+/* NOTE: cagney/2002-11-24: Targets need to both switch to generic
+ dummy frames, and use generic_pc_in_call_dummy(). The generic
+ version should be able to handle all cases since that code works by
+ saving the address of the dummy's breakpoint (where ever it is). */
+
+extern int deprecated_pc_in_call_dummy_on_stack (CORE_ADDR pc,
+ CORE_ADDR sp,
+ CORE_ADDR frame_address);
+
+/* NOTE: cagney/2002-11-24: Targets need to both switch to generic
+ dummy frames, and use generic_pc_in_call_dummy(). The generic
+ version should be able to handle all cases since that code works by
+ saving the address of the dummy's breakpoint (where ever it is). */
+
+extern int deprecated_pc_in_call_dummy_at_entry_point (CORE_ADDR pc,
+ CORE_ADDR sp,
+ CORE_ADDR frame_address);
+
+/* It's often not enough for our clients to know whether the PC is merely
+ somewhere within the call dummy. They may need to know whether the
+ call dummy has actually completed. (For example, wait_for_inferior
+ wants to know when it should truly stop because the call dummy has
+ completed. If we're single-stepping because of slow watchpoints,
+ then we may find ourselves stopped at the entry of the call dummy,
+ and want to continue stepping until we reach the end.)
-extern char stop_registers[REGISTER_BYTES];
+ Note that this macro is intended for targets (like HP-UX) which
+ require more than a single breakpoint in their call dummies, and
+ therefore cannot use the CALL_DUMMY_BREAKPOINT_OFFSET mechanism.
-/* Nonzero if pc has been changed by the debugger
- since the inferior stopped. */
+ If a target does define CALL_DUMMY_BREAKPOINT_OFFSET, then this
+ default implementation of CALL_DUMMY_HAS_COMPLETED is sufficient.
+ Else, a target may wish to supply an implementation that works in
+ the presense of multiple breakpoints in its call dummy.
+ */
+#if !defined(CALL_DUMMY_HAS_COMPLETED)
+#define CALL_DUMMY_HAS_COMPLETED(pc, sp, frame_address) \
+ DEPRECATED_PC_IN_CALL_DUMMY((pc), (sp), (frame_address))
+#endif
-extern int pc_changed;
+/* If STARTUP_WITH_SHELL is set, GDB's "run"
+ will attempts to start up the debugee under a shell.
+ This is in order for argument-expansion to occur. E.g.,
+ (gdb) run *
+ The "*" gets expanded by the shell into a list of files.
+ While this is a nice feature, it turns out to interact badly
+ with some of the catch-fork/catch-exec features we have added.
+ In particular, if the shell does any fork/exec's before
+ the exec of the target program, that can confuse GDB.
+ To disable this feature, set STARTUP_WITH_SHELL to 0.
+ To enable this feature, set STARTUP_WITH_SHELL to 1.
+ The catch-exec traps expected during start-up will
+ be 1 if target is not started up with a shell, 2 if it is.
+ - RT
+ If you disable this, you need to decrement
+ START_INFERIOR_TRAPS_EXPECTED in tm.h. */
+#define STARTUP_WITH_SHELL 1
+#if !defined(START_INFERIOR_TRAPS_EXPECTED)
+#define START_INFERIOR_TRAPS_EXPECTED 2
+#endif
+#endif /* !defined (INFERIOR_H) */
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