/* Variables that describe the inferior process running under GDB:
Where it is, why it stopped, and how to step it.
- Copyright 1986, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
- 1996, 1998, 1999, 2000, 2001, 2003 Free Software Foundation, Inc.
+ Copyright (C) 1986, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996,
+ 1998, 1999, 2000, 2001, 2003, 2004, 2005, 2006, 2007, 2008
+ Free Software Foundation, Inc.
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 2 of the License, or
+ 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,
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. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#if !defined (INFERIOR_H)
#define INFERIOR_H 1
+struct target_waitstatus;
+struct frame_info;
+struct ui_file;
+struct type;
struct gdbarch;
struct regcache;
extern void clear_sigio_trap (void);
-/* File name for default use for standard in/out in the inferior. */
+/* Set/get file name for default use for standard in/out in the inferior. */
-extern char *inferior_io_terminal;
+extern void set_inferior_io_terminal (const char *terminal_name);
+extern const char *get_inferior_io_terminal (void);
/* Collected pid, tid, etc. of the debugged inferior. When there's
no inferior, PIDGET (inferior_ptid) will be 0. */
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
+/* 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"
/* Inferior environment. */
-extern struct environ *inferior_environ;
+extern struct gdb_environ *inferior_environ;
extern void clear_proceed_status (void);
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 write_sp (CORE_ADDR);
-
-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,
+extern CORE_ADDR unsigned_pointer_to_address (struct type *type,
+ const gdb_byte *buf);
+extern void unsigned_address_to_pointer (struct type *type, gdb_byte *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,
+ const gdb_byte *buf);
+extern void address_to_signed_pointer (struct type *type, gdb_byte *buf,
CORE_ADDR addr);
extern void wait_for_inferior (void);
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 void child_terminal_info (char *, int);
extern void term_info (char *, int);
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));
/* From inflow.c */
-extern void new_tty_prefork (char *);
+extern void new_tty_prefork (const char *);
extern int gdb_has_a_terminal (void);
/* From infrun.c */
-extern void start_remote (void);
+extern void start_remote (int from_tty);
extern void normal_stop (void);
extern void tty_command (char *, int);
+extern void post_create_inferior (struct target_ops *, int);
+
extern void attach_command (char *, int);
extern char *get_inferior_args (void);
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_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?). */
+/* Anything but NO_STOP_QUIETLY means we expect a trap and the caller
+ will handle it themselves. STOP_QUIETLY is used when running in
+ the shell before the child program has been exec'd and when running
+ through shared library loading. STOP_QUIETLY_REMOTE is used when
+ setting up a remote connection; it is like STOP_QUIETLY_NO_SIGSTOP
+ except that there is no need to hide a signal. */
+
+/* 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_REMOTE,
+ STOP_QUIETLY_NO_SIGSTOP
+ };
-extern int stop_soon_quietly;
+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 attach_flag;
\f
-/* Possible values for CALL_DUMMY_LOCATION. */
+/* Possible values for gdbarch_call_dummy_location. */
#define ON_STACK 1
-#define BEFORE_TEXT_END 2
-#define AFTER_TEXT_END 3
#define AT_ENTRY_POINT 4
-
-#if !defined (CALL_DUMMY_ADDRESS)
-#define CALL_DUMMY_ADDRESS() (internal_error (__FILE__, __LINE__, "CALL_DUMMY_ADDRESS"), 0)
-#endif
-#if !defined (CALL_DUMMY_START_OFFSET)
-#define CALL_DUMMY_START_OFFSET (internal_error (__FILE__, __LINE__, "CALL_DUMMY_START_OFFSET"), 0)
-#endif
-#if !defined (CALL_DUMMY_BREAKPOINT_OFFSET)
-#define CALL_DUMMY_BREAKPOINT_OFFSET_P (0)
-#define CALL_DUMMY_BREAKPOINT_OFFSET (internal_error (__FILE__, __LINE__, "CALL_DUMMY_BREAKPOINT_OFFSET"), 0)
-#endif
-#if !defined CALL_DUMMY_BREAKPOINT_OFFSET_P
-#define CALL_DUMMY_BREAKPOINT_OFFSET_P (1)
-#endif
-#if !defined (CALL_DUMMY_LENGTH)
-#define CALL_DUMMY_LENGTH (internal_error (__FILE__, __LINE__, "CALL_DUMMY_LENGTH"), 0)
-#endif
-
-#if defined (CALL_DUMMY_STACK_ADJUST)
-#if !defined (CALL_DUMMY_STACK_ADJUST_P)
-#define CALL_DUMMY_STACK_ADJUST_P (1)
-#endif
-#endif
-#if !defined (CALL_DUMMY_STACK_ADJUST)
-#define CALL_DUMMY_STACK_ADJUST (internal_error (__FILE__, __LINE__, "CALL_DUMMY_STACK_ADJUST"), 0)
-#endif
-#if !defined (CALL_DUMMY_STACK_ADJUST_P)
-#define CALL_DUMMY_STACK_ADJUST_P (0)
-#endif
-
-/* FIXME: cagney/2000-04-17: gdbarch should manage this. The default
- shouldn't be necessary. */
-
-#if !defined (CALL_DUMMY_P)
-#if defined (CALL_DUMMY)
-#define CALL_DUMMY_P 1
-#else
-#define CALL_DUMMY_P 0
-#endif
-#endif
-
-#if !defined PUSH_DUMMY_FRAME
-#define PUSH_DUMMY_FRAME (internal_error (__FILE__, __LINE__, "PUSH_DUMMY_FRAME"), 0)
-#endif
-
-#if !defined FIX_CALL_DUMMY
-#define FIX_CALL_DUMMY(a1,a2,a3,a4,a5,a6,a7) (internal_error (__FILE__, __LINE__, "FIX_CALL_DUMMY"), 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_before_text_end (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_after_text_end (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_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 CALL_DUMMY_BREAKPOINT_OFFSET mechanism.
-
- 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
+#define AT_SYMBOL 5
/* If STARTUP_WITH_SHELL is set, GDB's "run"
will attempts to start up the debugee under a shell.