/* Data structures associated with breakpoints in GDB.
- Copyright 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
- 2002, 2003, 2004
- Free Software Foundation, Inc.
+ Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
+ 2002, 2003, 2004, 2007 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 (BREAKPOINT_H)
#define BREAKPOINT_H 1
stepping over signal handlers, and for skipping prologues. */
bp_step_resume,
- /* Used by wait_for_inferior for stepping over signal handlers. */
- bp_through_sigtramp,
-
/* Used to detect when a watchpoint expression has gone out of
scope. These breakpoints are usually not visible to the user.
hw_execute = 3 /* Execute HW breakpoint */
};
+
+/* Information used by targets to insert and remove breakpoints. */
+
+struct bp_target_info
+{
+ /* Address at which the breakpoint was placed. This is normally the
+ same as ADDRESS from the bp_location, except when adjustment
+ happens in gdbarch_breakpoint_from_pc. The most common form of
+ adjustment is stripping an alternate ISA marker from the PC which
+ is used to determine the type of breakpoint to insert. */
+ CORE_ADDR placed_address;
+
+ /* If the breakpoint lives in memory and reading that memory would
+ give back the breakpoint, instead of the original contents, then
+ the original contents are cached here. Only SHADOW_LEN bytes of
+ this buffer are valid, and only when the breakpoint is inserted. */
+ gdb_byte shadow_contents[BREAKPOINT_MAX];
+
+ /* The length of the data cached in SHADOW_CONTENTS. */
+ int shadow_len;
+
+ /* The size of the placed breakpoint, according to
+ gdbarch_breakpoint_from_pc, when the breakpoint was inserted. This is
+ generally the same as SHADOW_LEN, unless we did not need
+ to read from the target to implement the memory breakpoint
+ (e.g. if a remote stub handled the details). We may still
+ need the size to remove the breakpoint safely. */
+ int placed_size;
+};
+
/* GDB maintains two types of information about each breakpoint (or
watchpoint, or other related event). The first type corresponds
to struct breakpoint; this is a relatively high-level structure
associated with the address. Used primarily for overlay debugging. */
asection *section;
- /* "Real" contents of byte where breakpoint has been inserted.
- Valid only when breakpoints are in the program. Under the complete
- control of the target insert_breakpoint and remove_breakpoint routines.
- No other code should assume anything about the value(s) here.
- Valid only for bp_loc_software_breakpoint. */
- char shadow_contents[BREAKPOINT_MAX];
-
/* Address at which breakpoint was requested, either by the user or
by GDB for internal breakpoints. This will usually be the same
as ``address'' (above) except for cases in which
which to place the breakpoint in order to comply with a
processor's architectual constraints. */
CORE_ADDR requested_address;
+
+ /* Details of the placed breakpoint, when inserted. */
+ struct bp_target_info target_info;
+
+ /* Similarly, for the breakpoint at an overlay's LMA, if necessary. */
+ struct bp_target_info overlay_target_info;
};
/* This structure is a collection of function pointers that, if available,
/* Methods associated with this breakpoint. */
struct breakpoint_ops *ops;
+
+ /* Was breakpoint issued from a tty? Saved for the use of pending breakpoints. */
+ int from_tty;
+
+ /* Flag value for pending breakpoint.
+ first bit : 0 non-temporary, 1 temporary.
+ second bit : 0 normal breakpoint, 1 hardware breakpoint. */
+ int flag;
+
+ /* Is breakpoint pending on shlib loads? */
+ int pending;
};
\f
/* The following stuff is an abstract data type "bpstat" ("breakpoint
typedef struct bpstats *bpstat;
-/* Interface: */
-/* Clear a bpstat so that it says we are not at any breakpoint.
- Also free any storage that is part of a bpstat. */
+/* Frees any storage that is part of a bpstat.
+ Does not walk the 'next' chain. */
+extern void bpstat_free (bpstat);
+
+/* Clears a chain of bpstat, freeing storage
+ of each. */
extern void bpstat_clear (bpstat *);
/* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
is part of the bpstat is copied as well. */
extern bpstat bpstat_copy (bpstat);
-extern bpstat bpstat_stop_status (CORE_ADDR *pc, int not_a_sw_breakpoint);
+extern bpstat bpstat_stop_status (CORE_ADDR pc, ptid_t ptid,
+ int stopped_by_watchpoint);
\f
/* This bpstat_what stuff tells wait_for_inferior what to do with a
breakpoint (a challenging task). */
/* Clear step resume breakpoint, and keep checking. */
BPSTAT_WHAT_STEP_RESUME,
- /* Clear through_sigtramp breakpoint, muck with trap_expected, and keep
- checking. */
- BPSTAT_WHAT_THROUGH_SIGTRAMP,
-
/* Check the dynamic linker's data structures for new libraries, then
keep checking. */
BPSTAT_WHAT_CHECK_SHLIBS,
return means print the frame as well as the source line). */
extern enum print_stop_action bpstat_print (bpstat);
-/* Return the breakpoint number of the first breakpoint we are stopped
+/* Put in *NUM the breakpoint number of the first breakpoint we are stopped
at. *BSP upon return is a bpstat which points to the remaining
breakpoints stopped at (but which is not guaranteed to be good for
anything but further calls to bpstat_num).
- Return 0 if passed a bpstat which does not indicate any breakpoints. */
-extern int bpstat_num (bpstat *);
+ Return 0 if passed a bpstat which does not indicate any breakpoints.
+ Return -1 if stopped at a breakpoint that has been deleted since
+ we set it.
+ Return 1 otherwise. */
+extern int bpstat_num (bpstat *, int *);
/* Perform actions associated with having stopped at *BSP. Actually, we just
use this for breakpoint commands. Perhaps other actions will go here
extern int software_breakpoint_inserted_here_p (CORE_ADDR);
-/* FIXME: cagney/2002-11-10: The current [generic] dummy-frame code
- implements a functional superset of this function. The only reason
- it hasn't been removed is because some architectures still don't
- use the new framework. Once they have been fixed, this can go. */
-struct frame_info;
-extern int deprecated_frame_in_dummy (struct frame_info *);
-
extern int breakpoint_thread_match (CORE_ADDR, ptid_t);
extern void until_break_command (char *, int, int);
extern void enable_watchpoints_after_interactive_call_stop (void);
+/* For script interpreters that need to define breakpoint commands
+ after they've already read the commands into a struct command_line. */
+extern enum command_control_type commands_from_control_command
+ (char *arg, struct command_line *cmd);
extern void clear_breakpoint_hit_counts (void);
extern void remove_thread_event_breakpoints (void);
-extern void disable_breakpoints_in_shlibs (int silent);
+extern void disable_breakpoints_in_shlibs (void);
extern void re_enable_breakpoints_in_shlibs (void);
remove fails. */
extern int remove_hw_watchpoints (void);
+/* Manage a software single step breakpoint (or two). Insert may be called
+ twice before remove is called. */
+extern void insert_single_step_breakpoint (CORE_ADDR);
+extern void remove_single_step_breakpoints (void);
+
+/* Manage manual breakpoints, separate from the normal chain of
+ breakpoints. These functions are used in murky target-specific
+ ways. Please do not add more uses! */
+extern void *deprecated_insert_raw_breakpoint (CORE_ADDR);
+extern int deprecated_remove_raw_breakpoint (void *);
+
#endif /* !defined (BREAKPOINT_H) */
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