/* Variables that describe the inferior process running under GDB:
Where it is, why it stopped, and how to step it.
- Copyright 1986, 1989, 1992 Free Software Foundation, Inc.
-This file is part of GDB.
+ Copyright 1986, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
+ 1996, 1998, 1999, 2000, 2001, 2003 Free Software Foundation, Inc.
-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 file is part of GDB.
-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.
+ 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.
-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., 675 Mass Ave, Cambridge, MA 02139, USA. */
+ 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
-/* For symtab_and_line */
-#include "symtab.h"
+struct target_waitstatus;
+struct frame_info;
+struct ui_file;
+struct type;
+struct gdbarch;
+struct regcache;
/* For bpstat. */
#include "breakpoint.h"
-/* For FRAME_ADDR. */
+/* For enum target_signal. */
+#include "target.h"
+
+/* For struct frame_id. */
#include "frame.h"
-/*
- * Structure in which to save the status of the inferior. 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 {
- int pc_changed;
- int stop_signal;
- int stop_pc;
- FRAME_ADDR stop_frame_address;
- bpstat stop_bpstat;
- int stop_step;
- int stop_stack_dummy;
- int stopped_by_random_signal;
- int trap_expected;
- CORE_ADDR step_range_start;
- CORE_ADDR step_range_end;
- FRAME_ADDR step_frame_address;
- int step_over_calls;
- CORE_ADDR step_resume_break_address;
- int stop_after_trap;
- int stop_soon_quietly;
- FRAME_ADDR selected_frame_address;
- int selected_level;
- char stop_registers[REGISTER_BYTES];
- int breakpoint_proceeded;
- int restore_stack_info;
- int proceed_to_finish;
-};
-
-extern void
-save_inferior_status PARAMS ((struct inferior_status *, int));
-
-extern void
-restore_inferior_status PARAMS ((struct inferior_status *));
+/* 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 inferior_pid;
+extern CORE_ADDR read_pc (void);
-/* Character array containing an image of the inferior programs' registers. */
+extern CORE_ADDR read_pc_pid (ptid_t);
-extern char registers[];
+extern CORE_ADDR generic_target_read_pc (ptid_t);
-extern void
-clear_proceed_status PARAMS ((void));
+extern void write_pc (CORE_ADDR);
-extern void
-proceed PARAMS ((CORE_ADDR, int, int));
+extern void write_pc_pid (CORE_ADDR, ptid_t);
-extern void
-kill_inferior PARAMS ((void));
+extern void generic_target_write_pc (CORE_ADDR, ptid_t);
-extern void
-kill_inferior_fast PARAMS ((void));
+extern CORE_ADDR read_sp (void);
-extern void
-generic_mourn_inferior PARAMS ((void));
+extern CORE_ADDR generic_target_read_sp (void);
-extern void
-terminal_ours PARAMS ((void));
+extern void generic_target_write_sp (CORE_ADDR);
-extern void
-run_stack_dummy PARAMS ((CORE_ADDR, char [REGISTER_BYTES]));
+extern CORE_ADDR deprecated_read_fp (void);
-extern CORE_ADDR
-read_pc PARAMS ((void));
+extern CORE_ADDR unsigned_pointer_to_address (struct type *type, const void *buf);
-extern void
-write_pc PARAMS ((CORE_ADDR));
+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 PARAMS ((void));
+extern void wait_for_inferior (void);
-extern void
-init_wait_for_inferior PARAMS ((void));
+extern void fetch_inferior_event (void *);
-extern void
-close_exec_file PARAMS ((void));
+extern void init_wait_for_inferior (void);
-extern void
-reopen_exec_file PARAMS ((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
-store_inferior_registers PARAMS ((int));
+extern void default_print_registers_info (struct gdbarch *gdbarch,
+ struct ui_file *file,
+ struct frame_info *frame,
+ int regnum, int all);
-extern void
-fetch_inferior_registers PARAMS ((int));
+extern void store_inferior_registers (int);
-extern void
-solib_create_inferior_hook PARAMS ((void));
+extern void fetch_inferior_registers (int);
-extern void
-child_mourn_inferior PARAMS ((void));
+extern void solib_create_inferior_hook (void);
-extern void
-child_terminal_info PARAMS ((char *, int));
+extern void child_terminal_info (char *, int);
-extern void
-term_info PARAMS ((char *, int));
+extern void term_info (char *, int);
-extern void
-terminal_ours_for_output PARAMS ((void));
+extern void terminal_ours_for_output (void);
-extern void
-terminal_inferior PARAMS ((void));
+extern void terminal_inferior (void);
-extern void
-terminal_init_inferior PARAMS ((void));
+extern void terminal_init_inferior (void);
-/* From infptrace.c or procfs.c */
+extern void terminal_init_inferior_with_pgrp (int pgrp);
-extern int
-attach PARAMS ((int));
+/* From infptrace.c or infttrace.c */
-void
-detach PARAMS ((int));
+extern int attach (int);
-extern void
-child_resume PARAMS ((int, 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 */
-#ifdef USE_PROC_FS
+extern int proc_iterate_over_mappings (int (*)(int, CORE_ADDR));
-extern int
-proc_iterate_over_mappings PARAMS ((int (*) (int, CORE_ADDR)));
+extern ptid_t procfs_first_available (void);
-extern int
-proc_wait PARAMS ((int *));
+/* From fork-child.c */
-extern void
-inferior_proc_init PARAMS ((int));
+extern void fork_inferior (char *, char *, char **,
+ void (*)(void),
+ void (*)(int), void (*)(void), char *);
-extern void
-proc_signal_handling_change PARAMS ((void));
-extern void
-proc_set_exec_trap PARAMS ((void));
+extern void startup_inferior (int);
-#endif
+extern char *construct_inferior_arguments (struct gdbarch *, int, char **);
/* From inflow.c */
-extern void
-new_tty_prefork PARAMS ((char *));
+extern void new_tty_prefork (char *);
+
+extern int gdb_has_a_terminal (void);
/* From infrun.c */
-extern void
-start_remote PARAMS ((void));
+extern void start_remote (void);
-extern void
-child_create_inferior PARAMS ((char *, char *, char **));
+extern void normal_stop (void);
-extern void
-child_attach PARAMS ((char *, int));
+extern int signal_stop_state (int);
-extern void
-normal_stop PARAMS ((void));
+extern int signal_print_state (int);
-extern int
-signal_stop_state PARAMS ((int));
+extern int signal_pass_state (int);
-extern int
-signal_print_state PARAMS ((int));
+extern int signal_stop_update (int, int);
-extern int
-signal_pass_state PARAMS ((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 PARAMS ((char *, int));
+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
-attach_command PARAMS ((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. */
-
-extern FRAME_ADDR stop_frame_address;
-
/* Chain containing status of breakpoint(s) that we have stopped at. */
extern bpstat stop_bpstat;
/* 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 FRAME_ADDR step_frame_address;
+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;
-/* Nonzero means expecting a trap and caller will handle it themselves.
- It is used after attach, due to attaching to a process;
- when running in the shell before the child program has been exec'd;
- and when running some kinds of remote stuff (FIXME?). */
-
-extern int stop_soon_quietly;
+/* 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. */
Thus this contains the return value from the called function (assuming
values are returned in a register). */
-extern char stop_registers[REGISTER_BYTES];
-
-/* Nonzero if pc has been changed by the debugger
- since the inferior stopped. */
-
-extern int pc_changed;
+extern struct regcache *stop_registers;
-/* Nonzero if the child process in inferior_pid was attached rather
+/* 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 BEFORE_TEXT_END 2
-#define AFTER_TEXT_END 3
-
-#if !defined (CALL_DUMMY_LOCATION)
-#define CALL_DUMMY_LOCATION ON_STACK
-#endif /* No CALL_DUMMY_LOCATION. */
-
-/* Are we in a call dummy? The code below which allows DECR_PC_AFTER_BREAK
- below is for infrun.c, which may give the macro a pc without that
- subtracted out. */
-#if !defined (PC_IN_CALL_DUMMY)
-#if CALL_DUMMY_LOCATION == BEFORE_TEXT_END
-extern CORE_ADDR text_end;
-#define PC_IN_CALL_DUMMY(pc, sp, frame_address) \
- ((pc) >= text_end - CALL_DUMMY_LENGTH \
- && (pc) < text_end + DECR_PC_AFTER_BREAK)
-#else /* Not before text_end. */
-#if CALL_DUMMY_LOCATION == AFTER_TEXT_END
-extern CORE_ADDR text_end;
-#define PC_IN_CALL_DUMMY(pc, sp, frame_address) \
- ((pc) >= text_end \
- && (pc) < text_end + CALL_DUMMY_LENGTH + DECR_PC_AFTER_BREAK)
-#else /* On stack. */
-#define PC_IN_CALL_DUMMY(pc, sp, frame_address) \
- ((sp) INNER_THAN (pc) && (pc) INNER_THAN (frame_address))
-#endif /* On stack. */
-#endif /* Not before text_end. */
-#endif /* No PC_IN_CALL_DUMMY. */
-
-#endif /* !defined (INFERIOR_H) */
+#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.)
+
+ 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 DEPRECATED_CALL_DUMMY_BREAKPOINT_OFFSET
+ mechanism.
+
+ If a target does define DEPRECATED_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
+
+/* 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) */