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INFO-DIR-SECTION Software development
START-INFO-DIR-ENTRY
* Gdb-Internals: (gdbint).      The GNU debugger's internals.
END-INFO-DIR-ENTRY

   Copyright (C) 1990, 1991, 1992, 1993, 1994, 1996, 1998, 1999, 2000,
2001, 2002, 2003, 2004, 2005, 2006, 2008, 2009, 2010 Free Software
Foundation, Inc.  Contributed by Cygnus Solutions.  Written by John
Gilmore.  Second Edition by Stan Shebs.

   Permission is granted to copy, distribute and/or modify this document
under the terms of the GNU Free Documentation License, Version 1.3 or
any later version published by the Free Software Foundation; with no
Invariant Sections, with no Front-Cover Texts, and with no Back-Cover
Texts.  A copy of the license is included in the section entitled "GNU
Free Documentation License".

   This file documents the internals of the GNU debugger GDB.

   Copyright (C) 1990, 1991, 1992, 1993, 1994, 1996, 1998, 1999, 2000,
2001, 2002, 2003, 2004, 2005, 2006, 2008, 2009, 2010 Free Software
Foundation, Inc.  Contributed by Cygnus Solutions.  Written by John
Gilmore.  Second Edition by Stan Shebs.

   Permission is granted to copy, distribute and/or modify this document
under the terms of the GNU Free Documentation License, Version 1.3 or
any later version published by the Free Software Foundation; with no
Invariant Sections, with no Front-Cover Texts, and with no Back-Cover
Texts.  A copy of the license is included in the section entitled "GNU
Free Documentation License".


File: gdbint.info,  Node: GDB Observers,  Next: GNU Free Documentation License,  Prev: Hints,  Up: Top

Appendix A GDB Currently available observers
********************************************

A.1 Implementation rationale
============================

An "observer" is an entity which is interested in being notified when
GDB reaches certain states, or certain events occur in GDB.  The entity
being observed is called the "subject".  To receive notifications, the
observer attaches a callback to the subject.  One subject can have
several observers.

   `observer.c' implements an internal generic low-level event
notification mechanism.  This generic event notification mechanism is
then re-used to implement the exported high-level notification
management routines for all possible notifications.

   The current implementation of the generic observer provides support
for contextual data.  This contextual data is given to the subject when
attaching the callback.  In return, the subject will provide this
contextual data back to the observer as a parameter of the callback.

   Note that the current support for the contextual data is only
partial, as it lacks a mechanism that would deallocate this data when
the callback is detached.  This is not a problem so far, as this
contextual data is only used internally to hold a function pointer.
Later on, if a certain observer needs to provide support for user-level
contextual data, then the generic notification mechanism will need to be
enhanced to allow the observer to provide a routine to deallocate the
data when attaching the callback.

   The observer implementation is also currently not reentrant.  In
particular, it is therefore not possible to call the attach or detach
routines during a notification.

A.2 Debugging
=============

Observer notifications can be traced using the command `set debug
observer 1' (*note Optional messages about internal happenings:
(gdb)Debugging Output.).

A.3 `normal_stop' Notifications
===============================

GDB notifies all `normal_stop' observers when the inferior execution
has just stopped, the associated messages and annotations have been
printed, and the control is about to be returned to the user.

   Note that the `normal_stop' notification is not emitted when the
execution stops due to a breakpoint, and this breakpoint has a
condition that is not met.  If the breakpoint has any associated
commands list, the commands are executed after the notification is
emitted.

   The following interfaces are available to manage observers:

 -- Function: extern struct observer *observer_attach_EVENT
          (observer_EVENT_ftype *F)
     Using the function F, create an observer that is notified when
     ever EVENT occurs, return the observer.

 -- Function: extern void observer_detach_EVENT (struct observer
          *OBSERVER);
     Remove OBSERVER from the list of observers to be notified when
     EVENT occurs.

 -- Function: extern void observer_notify_EVENT (void);
     Send a notification to all EVENT observers.

   The following observable events are defined:

 -- Function: void normal_stop (struct bpstats *BS, int PRINT_FRAME)
     The inferior has stopped for real.  The  BS argument describes the
     breakpoints were are stopped at, if any.  Second argument
     PRINT_FRAME non-zero means display the location where the inferior
     has stopped.

 -- Function: void target_changed (struct target_ops *TARGET)
     The target's register contents have changed.

 -- Function: void executable_changed (void)
     The executable being debugged by GDB has changed: The user decided
     to debug a different program, or the program he was debugging has
     been modified since being loaded by the debugger (by being
     recompiled, for instance).

 -- Function: void inferior_created (struct target_ops *OBJFILE, int
          FROM_TTY)
     GDB has just connected to an inferior.  For `run', GDB calls this
     observer while the inferior is still stopped at the entry-point
     instruction.  For `attach' and `core', GDB calls this observer
     immediately after connecting to the inferior, and before any
     information on the inferior has been printed.

 -- Function: void solib_loaded (struct so_list *SOLIB)
     The shared library specified by SOLIB has been loaded.  Note that
     when GDB calls this observer, the library's symbols probably
     haven't been loaded yet.

 -- Function: void solib_unloaded (struct so_list *SOLIB)
     The shared library specified by SOLIB has been unloaded.  Note
     that when GDB calls this observer, the library's symbols have not
     been unloaded yet, and thus are still available.

 -- Function: void new_objfile (struct objfile *OBJFILE)
     The symbol file specified by OBJFILE has been loaded.  Called with
     OBJFILE equal to `NULL' to indicate previously loaded symbol table
     data has now been invalidated.

 -- Function: void new_thread (struct thread_info *T)
     The thread specified by T has been created.

 -- Function: void thread_exit (struct thread_info *T, int SILENT)
     The thread specified by T has exited.  The SILENT argument
     indicates that GDB is removing the thread from its tables without
     wanting to notify the user about it.

 -- Function: void thread_stop_requested (ptid_t PTID)
     An explicit stop request was issued to PTID.  If PTID equals
     MINUS_ONE_PTID, the request applied to all threads.  If
     `ptid_is_pid(ptid)' returns true, the request applied to all
     threads of the process pointed at by PTID.  Otherwise, the request
     applied to the single thread pointed at by PTID.

 -- Function: void target_resumed (ptid_t PTID)
     The target was resumed.  The PTID parameter specifies which thread
     was resume, and may be RESUME_ALL if all threads are resumed.

 -- Function: void about_to_proceed (void)
     The target is about to be proceeded.

 -- Function: void breakpoint_created (int BPNUM)
     A new breakpoint has been created.  The argument BPNUM is the
     number of the newly-created breakpoint.

 -- Function: void breakpoint_deleted (int BPNUM)
     A breakpoint has been destroyed.  The argument BPNUM is the number
     of the newly-destroyed breakpoint.

 -- Function: void breakpoint_modified (int BPNUM)
     A breakpoint has been modified in some way.  The argument BPNUM is
     the number of the modified breakpoint.

 -- Function: void tracepoint_created (int TPNUM)
     A new tracepoint has been created.  The argument TPNUM is the
     number of the newly-created tracepoint.

 -- Function: void tracepoint_deleted (int TPNUM)
     A tracepoint has been destroyed.  The argument TPNUM is the number
     of the newly-destroyed tracepoint.

 -- Function: void tracepoint_modified (int TPNUM)
     A tracepoint has been modified in some way.  The argument TPNUM is
     the number of the modified tracepoint.

 -- Function: void architecture_changed (struct gdbarch *NEWARCH)
     The current architecture has changed.  The argument NEWARCH is a
     pointer to the new architecture.

 -- Function: void thread_ptid_changed (ptid_t OLD_PTID, ptid_t
          NEW_PTID)
     The thread's ptid has changed.  The OLD_PTID parameter specifies
     the old value, and NEW_PTID specifies the new value.

 -- Function: void inferior_added (struct inferior *INF)
     The inferior INF has been added to the list of inferiors.  At this
     point, it might not be associated with any process.

 -- Function: void inferior_appeared (struct inferior *INF)
     The inferior identified by INF has been attached to a process.

 -- Function: void inferior_exit (struct inferior *INF)
     Either the inferior associated with INF has been detached from the
     process, or the process has exited.

 -- Function: void inferior_removed (struct inferior *INF)
     The inferior INF has been removed from the list of inferiors.
     This method is called immediately before freeing INF.

 -- Function: void memory_changed (CORE_ADDR ADDR, int LEN, const
          bfd_byte *DATA)
     Bytes from DATA to DATA + LEN have been written to the current
     inferior at ADDR.

 -- Function: void test_notification (int SOMEARG)
     This observer is used for internal testing.  Do not use.  See
     testsuite/gdb.gdb/observer.exp.


File: gdbint.info,  Node: GNU Free Documentation License,  Next: Index,  Prev: GDB Observers,  Up: Top

Appendix B GNU Free Documentation License
*****************************************

                     Version 1.3, 3 November 2008

     Copyright (C) 2000, 2001, 2002, 2007, 2008 Free Software Foundation, Inc.
     `http://fsf.org/'

     Everyone is permitted to copy and distribute verbatim copies
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  0. PREAMBLE

     The purpose of this License is to make a manual, textbook, or other
     functional and useful document "free" in the sense of freedom: to
     assure everyone the effective freedom to copy and redistribute it,
     with or without modifying it, either commercially or
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     being considered responsible for modifications made by others.

     This License is a kind of "copyleft", which means that derivative
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     It complements the GNU General Public License, which is a copyleft
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     We have designed this License in order to use it for manuals for
     free software, because free software needs free documentation: a
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  2. VERBATIM COPYING

     You may copy and distribute the Document in any medium, either
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     If you publish or distribute Opaque copies of the Document
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     It is requested, but not required, that you contact the authors of
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  4. MODIFICATIONS

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       A. Use in the Title Page (and on the covers, if any) a title
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       B. List on the Title Page, as authors, one or more persons or
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       C. State on the Title page the name of the publisher of the
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       E. Add an appropriate copyright notice for your modifications
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       G. Preserve in that license notice the full lists of Invariant
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       H. Include an unaltered copy of this License.

       I. Preserve the section Entitled "History", Preserve its Title,
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  7. AGGREGATION WITH INDEPENDENT WORKS

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  8. TRANSLATION

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  9. TERMINATION

     You may not copy, modify, sublicense, or distribute the Document
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 10. FUTURE REVISIONS OF THIS LICENSE

     The Free Software Foundation may publish new, revised versions of
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 11. RELICENSING

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File: gdbint.info,  Node: Index,  Prev: GNU Free Documentation License,  Up: Top

Index
*****

[index]
* Menu:

* $fp:                                   Register Information Functions.
                                                              (line 126)
* $pc:                                   Register Architecture Functions & Variables.
                                                              (line  58)
* $ps:                                   Register Architecture Functions & Variables.
                                                              (line  69)
* $sp:                                   Register Architecture Functions & Variables.
                                                              (line  49)
* _initialize_ARCH_tdep <1>:             Adding a New Target. (line  22)
* _initialize_ARCH_tdep:                 How an Architecture is Represented.
                                                              (line  13)
* _initialize_language:                  Language Support.    (line  79)
* a.out format:                          Symbol Handling.     (line 218)
* about_to_proceed:                      GDB Observers.       (line 133)
* abstract interpretation of function prologues: Algorithms.  (line  48)
* add_cmd:                               User Interface.      (line  21)
* add_com:                               User Interface.      (line  21)
* add_setshow_cmd:                       User Interface.      (line  26)
* add_setshow_cmd_full:                  User Interface.      (line  26)
* add_symtab_fns:                        Symbol Handling.     (line  37)
* adding a new host:                     Host Definition.     (line  13)
* adding a symbol-reading module:        Symbol Handling.     (line  37)
* adding a target:                       Adding a New Target. (line   6)
* adding debugging info reader:          Symbol Handling.     (line 365)
* adding source language:                Language Support.    (line  17)
* address classes:                       Address Classes.     (line   6)
* address representation:                Pointers and Addresses.
                                                              (line   6)
* address spaces, separate data and code: Pointers and Addresses.
                                                              (line   6)
* address_class_name_to_type_flags:      Defining Other Architecture Features.
                                                              (line  28)
* address_class_name_to_type_flags_p:    Defining Other Architecture Features.
                                                              (line  39)
* algorithms:                            Algorithms.          (line   6)
* align_down:                            Functions and Variable to Analyze Frames.
                                                              (line  46)
* align_up:                              Functions and Variable to Analyze Frames.
                                                              (line  46)
* allocate_symtab:                       Language Support.    (line  83)
* ARCH-tdep.c:                           How an Architecture is Represented.
                                                              (line  13)
* architecture representation:           How an Architecture is Represented.
                                                              (line   6)
* architecture_changed:                  GDB Observers.       (line 160)
* Array Containers:                      Support Libraries.   (line 131)
* assumptions about targets:             Coding.              (line 519)
* base of a frame:                       Frame Handling Terminology.
                                                              (line  28)
* BFD library:                           Support Libraries.   (line   9)
* bfd_arch_info:                         Looking Up an Existing Architecture.
                                                              (line  41)
* BIG_BREAKPOINT:                        Defining Other Architecture Features.
                                                              (line 100)
* BPT_VECTOR:                            Defining Other Architecture Features.
                                                              (line 536)
* BREAKPOINT:                            Defining Other Architecture Features.
                                                              (line  88)
* breakpoint address adjusted:           Defining Other Architecture Features.
                                                              (line 145)
* breakpoint_created:                    GDB Observers.       (line 136)
* breakpoint_deleted:                    GDB Observers.       (line 140)
* breakpoint_modified:                   GDB Observers.       (line 144)
* breakpoints:                           Algorithms.          (line 151)
* bug-gdb mailing list:                  Getting Started.     (line  72)
* build script:                          Debugging GDB.       (line  94)
* C data types:                          Coding.              (line 389)
* call frame information:                Algorithms.          (line  14)
* call stack frame:                      Stack Frames.        (line   6)
* calls to the inferior:                 Inferior Call Setup. (line   6)
* CC_HAS_LONG_LONG:                      Host Definition.     (line 105)
* CFI (call frame information):          Algorithms.          (line  14)
* checkpoints:                           Algorithms.          (line 600)
* cleanups:                              Coding.              (line  12)
* CLI:                                   User Interface.      (line  12)
* code pointers, word-addressed:         Pointers and Addresses.
                                                              (line   6)
* coding standards:                      Coding.              (line 215)
* COFF debugging info:                   Symbol Handling.     (line 315)
* COFF format:                           Symbol Handling.     (line 233)
* command implementation:                Getting Started.     (line  60)
* command interpreter:                   User Interface.      (line  12)
* comment formatting:                    Coding.              (line 363)
* compiler warnings:                     Coding.              (line 271)
* Compressed DWARF 2 debugging info:     Symbol Handling.     (line 335)
* computed values:                       Values.              (line  35)
* configure.tgt:                         How an Architecture is Represented.
                                                              (line  19)
* converting between pointers and addresses: Pointers and Addresses.
                                                              (line   6)
* converting integers to addresses:      Defining Other Architecture Features.
                                                              (line 274)
* cooked register representation:        Raw and Cooked Registers.
                                                              (line   6)
* core files:                            Adding support for debugging core files.
                                                              (line   6)
* core_addr_greaterthan:                 Functions and Variable to Analyze Frames.
                                                              (line  30)
* core_addr_lessthan:                    Functions and Variable to Analyze Frames.
                                                              (line  30)
* CRLF_SOURCE_FILES:                     Host Definition.     (line  86)
* current_language:                      Language Support.    (line  75)
* D10V addresses:                        Pointers and Addresses.
                                                              (line   6)
* data output:                           User Interface.      (line 254)
* data-pointer, per-architecture/per-module: Coding.          (line 100)
* debugging GDB:                         Debugging GDB.       (line   6)
* DEFAULT_PROMPT:                        Host Definition.     (line  93)
* deprecate_cmd:                         User Interface.      (line  32)
* DEPRECATED_IBM6000_TARGET:             Defining Other Architecture Features.
                                                              (line 242)
* deprecating commands:                  User Interface.      (line  32)
* design:                                Coding.              (line 514)
* DEV_TTY:                               Host Definition.     (line  96)
* DIRNAME_SEPARATOR:                     Coding.              (line 584)
* DISABLE_UNSETTABLE_BREAK:              Defining Other Architecture Features.
                                                              (line 211)
* discard_cleanups:                      Coding.              (line  39)
* do_cleanups:                           Coding.              (line  35)
* DOS text files:                        Host Definition.     (line  87)
* dummy frames:                          About Dummy Frames.  (line   6)
* DW_AT_address_class:                   Address Classes.     (line   6)
* DW_AT_byte_size:                       Address Classes.     (line   6)
* DWARF 2 debugging info:                Symbol Handling.     (line 328)
* DWARF 3 debugging info:                Symbol Handling.     (line 355)
* ECOFF debugging info:                  Symbol Handling.     (line 321)
* ECOFF format:                          Symbol Handling.     (line 248)
* ELF format:                            Symbol Handling.     (line 281)
* evaluate_subexp:                       Language Support.    (line  58)
* executable_changed:                    GDB Observers.       (line  85)
* execution state:                       Managing Execution State.
                                                              (line   6)
* experimental branches:                 Versions and Branches.
                                                              (line 116)
* expression evaluation routines:        Language Support.    (line  58)
* expression parser:                     Language Support.    (line  21)
* extract_typed_address:                 Pointers and Addresses.
                                                              (line  52)
* field output functions:                User Interface.      (line 254)
* file names, portability:               Coding.              (line 552)
* FILENAME_CMP:                          Coding.              (line 578)
* find_pc_function:                      Symbol Handling.     (line 136)
* find_pc_line:                          Symbol Handling.     (line 136)
* find_sym_fns:                          Symbol Handling.     (line  32)
* finding a symbol:                      Symbol Handling.     (line 133)
* fine-tuning gdbarch structure:         OS ABI Variant Handling.
                                                              (line  23)
* first floating point register:         Register Architecture Functions & Variables.
                                                              (line  78)
* FOPEN_RB:                              Host Definition.     (line 102)
* fp0_regnum:                            Register Architecture Functions & Variables.
                                                              (line  78)
* frame:                                 Stack Frames.        (line   6)
* frame ID:                              Stack Frames.        (line  41)
* frame pointer:                         Register Information Functions.
                                                              (line 126)
* frame, definition of base of a frame:  Frame Handling Terminology.
                                                              (line  28)
* frame, definition of innermost frame:  Frame Handling Terminology.
                                                              (line  24)
* frame, definition of NEXT frame:       Frame Handling Terminology.
                                                              (line  11)
* frame, definition of PREVIOUS frame:   Frame Handling Terminology.
                                                              (line  14)
* frame, definition of sentinel frame:   Frame Handling Terminology.
                                                              (line  52)
* frame, definition of sniffing:         Frame Handling Terminology.
                                                              (line  46)
* frame, definition of THIS frame:       Frame Handling Terminology.
                                                              (line   9)
* frame, definition of unwinding:        Frame Handling Terminology.
                                                              (line  41)
* frame_align:                           Functions and Variable to Analyze Frames.
                                                              (line  46)
* frame_base:                            Analyzing Stacks---Frame Sniffers.
                                                              (line  89)
* frame_base_append_sniffer:             Analyzing Stacks---Frame Sniffers.
                                                              (line  19)
* frame_base_set_default:                Analyzing Stacks---Frame Sniffers.
                                                              (line  22)
* frame_num_args:                        Functions to Access Frame Data.
                                                              (line  43)
* frame_red_zone_size:                   Functions and Variable to Analyze Frames.
                                                              (line  63)
* frame_register_unwind:                 Stack Frames.        (line  15)
* frame_unwind:                          Analyzing Stacks---Frame Sniffers.
                                                              (line  36)
* frame_unwind_append_sniffer:           Analyzing Stacks---Frame Sniffers.
                                                              (line  16)
* frame_unwind_append_unwinder:          Stack Frames.        (line  30)
* frame_unwind_got_address:              Stack Frames.        (line 105)
* frame_unwind_got_constant:             Stack Frames.        (line 101)
* frame_unwind_got_memory:               Stack Frames.        (line  98)
* frame_unwind_got_optimized:            Stack Frames.        (line  90)
* frame_unwind_got_register:             Stack Frames.        (line  93)
* frame_unwind_prepend_unwinder:         Stack Frames.        (line  30)
* full symbol table:                     Symbol Handling.     (line 104)
* function prologue:                     Prologue Caches.     (line   6)
* function prototypes:                   Coding.              (line 411)
* function usage:                        Coding.              (line 393)
* fundamental types:                     Symbol Handling.     (line 183)
* GCC2_COMPILED_FLAG_SYMBOL:             Defining Other Architecture Features.
                                                              (line 225)
* GCC_COMPILED_FLAG_SYMBOL:              Defining Other Architecture Features.
                                                              (line 225)
* GDB source tree structure:             Overall Structure.   (line  83)
* gdb_byte:                              Register Caching.    (line  23)
* GDB_OSABI_AIX:                         OS ABI Variant Handling.
                                                              (line  90)
* GDB_OSABI_CYGWIN:                      OS ABI Variant Handling.
                                                              (line  87)
* GDB_OSABI_FREEBSD_AOUT:                OS ABI Variant Handling.
                                                              (line  51)
* GDB_OSABI_FREEBSD_ELF:                 OS ABI Variant Handling.
                                                              (line  54)
* GDB_OSABI_GO32:                        OS ABI Variant Handling.
                                                              (line  69)
* GDB_OSABI_HPUX_ELF:                    OS ABI Variant Handling.
                                                              (line  78)
* GDB_OSABI_HPUX_SOM:                    OS ABI Variant Handling.
                                                              (line  81)
* GDB_OSABI_HURD:                        OS ABI Variant Handling.
                                                              (line  39)
* GDB_OSABI_INTERIX:                     OS ABI Variant Handling.
                                                              (line  75)
* GDB_OSABI_IRIX:                        OS ABI Variant Handling.
                                                              (line  72)
* GDB_OSABI_LINUX:                       OS ABI Variant Handling.
                                                              (line  48)
* GDB_OSABI_NETBSD_AOUT:                 OS ABI Variant Handling.
                                                              (line  57)
* GDB_OSABI_NETBSD_ELF:                  OS ABI Variant Handling.
                                                              (line  60)
* GDB_OSABI_OPENBSD_ELF:                 OS ABI Variant Handling.
                                                              (line  63)
* GDB_OSABI_OSF1:                        OS ABI Variant Handling.
                                                              (line  45)
* GDB_OSABI_QNXNTO:                      OS ABI Variant Handling.
                                                              (line  84)
* GDB_OSABI_SOLARIS:                     OS ABI Variant Handling.
                                                              (line  42)
* GDB_OSABI_SVR4:                        OS ABI Variant Handling.
                                                              (line  36)
* GDB_OSABI_UNINITIALIZED:               OS ABI Variant Handling.
                                                              (line  29)
* GDB_OSABI_UNKNOWN:                     OS ABI Variant Handling.
                                                              (line  32)
* GDB_OSABI_WINCE:                       OS ABI Variant Handling.
                                                              (line  66)
* gdbarch:                               How an Architecture is Represented.
                                                              (line  19)
* gdbarch accessor functions:            Creating a New Architecture.
                                                              (line  14)
* gdbarch lookup:                        Looking Up an Existing Architecture.
                                                              (line   6)
* gdbarch register architecture functions: Register Architecture Functions & Variables.
                                                              (line   6)
* gdbarch register information functions: Register Information Functions.
                                                              (line   6)
* gdbarch_addr_bits_remove:              Defining Other Architecture Features.
                                                              (line  11)
* gdbarch_address_class_name_to_type_flags: Address Classes.  (line  30)
* gdbarch_address_class_type_flags <1>:  Defining Other Architecture Features.
                                                              (line  43)
* gdbarch_address_class_type_flags:      Address Classes.     (line  18)
* gdbarch_address_class_type_flags_p:    Defining Other Architecture Features.
                                                              (line  52)
* gdbarch_address_class_type_flags_to_name <1>: Defining Other Architecture Features.
                                                              (line  56)
* gdbarch_address_class_type_flags_to_name: Address Classes.  (line  25)
* gdbarch_address_class_type_flags_to_name_p: Defining Other Architecture Features.
                                                              (line  60)
* gdbarch_address_to_pointer <1>:        Defining Other Architecture Features.
                                                              (line  65)
* gdbarch_address_to_pointer:            Pointers and Addresses.
                                                              (line 114)
* gdbarch_adjust_breakpoint_address:     Defining Other Architecture Features.
                                                              (line 145)
* gdbarch_alloc:                         Creating a New Architecture.
                                                              (line   6)
* gdbarch_believe_pcc_promotion:         Defining Other Architecture Features.
                                                              (line  72)
* gdbarch_bits_big_endian:               Defining Other Architecture Features.
                                                              (line  77)
* gdbarch_breakpoint_from_pc:            Defining Other Architecture Features.
                                                              (line 106)
* gdbarch_call_dummy_location:           Defining Other Architecture Features.
                                                              (line 178)
* gdbarch_cannot_fetch_register:         Defining Other Architecture Features.
                                                              (line 184)
* gdbarch_cannot_store_register:         Defining Other Architecture Features.
                                                              (line 188)
* gdbarch_char_signed:                   Defining Other Architecture Features.
                                                              (line 461)
* gdbarch_convert_register_p <1>:        Defining Other Architecture Features.
                                                              (line 195)
* gdbarch_convert_register_p:            Register and Memory Data.
                                                              (line  30)
* gdbarch_data:                          Coding.              (line 133)
* gdbarch_data_register_post_init:       Coding.              (line 118)
* gdbarch_data_register_pre_init:        Coding.              (line 108)
* gdbarch_decr_pc_after_break:           Defining Other Architecture Features.
                                                              (line 205)
* gdbarch_deprecated_fp_regnum:          Defining Other Architecture Features.
                                                              (line 446)
* gdbarch_double_bit:                    Defining Other Architecture Features.
                                                              (line 471)
* gdbarch_dummy_id:                      Defining Other Architecture Features.
                                                              (line 523)
* gdbarch_dwarf2_reg_to_regnum:          Defining Other Architecture Features.
                                                              (line 216)
* gdbarch_ecoff_reg_to_regnum:           Defining Other Architecture Features.
                                                              (line 220)
* gdbarch_float_bit:                     Defining Other Architecture Features.
                                                              (line 475)
* gdbarch_fp0_regnum:                    Defining Other Architecture Features.
                                                              (line 200)
* gdbarch_get_longjmp_target <1>:        Defining Other Architecture Features.
                                                              (line 231)
* gdbarch_get_longjmp_target:            Algorithms.          (line 263)
* gdbarch_have_nonsteppable_watchpoint:  Algorithms.          (line 396)
* gdbarch_in_function_epilogue_p:        Defining Other Architecture Features.
                                                              (line 253)
* gdbarch_in_solib_return_trampoline:    Defining Other Architecture Features.
                                                              (line 259)
* gdbarch_info:                          Looking Up an Existing Architecture.
                                                              (line  22)
* gdbarch_init_osabi:                    OS ABI Variant Handling.
                                                              (line 125)
* gdbarch_int_bit:                       Defining Other Architecture Features.
                                                              (line 478)
* gdbarch_integer_to_address:            Defining Other Architecture Features.
                                                              (line 274)
* gdbarch_list_lookup_by_info:           Looking Up an Existing Architecture.
                                                              (line  22)
* gdbarch_long_bit:                      Defining Other Architecture Features.
                                                              (line 481)
* gdbarch_long_double_bit:               Defining Other Architecture Features.
                                                              (line 485)
* gdbarch_long_long_bit:                 Defining Other Architecture Features.
                                                              (line 489)
* gdbarch_lookup_osabi:                  OS ABI Variant Handling.
                                                              (line 119)
* gdbarch_memory_insert_breakpoint:      Defining Other Architecture Features.
                                                              (line 130)
* gdbarch_memory_remove_breakpoint:      Defining Other Architecture Features.
                                                              (line 130)
* gdbarch_osabi_name:                    OS ABI Variant Handling.
                                                              (line  97)
* gdbarch_pointer_to_address <1>:        Defining Other Architecture Features.
                                                              (line 295)
* gdbarch_pointer_to_address:            Pointers and Addresses.
                                                              (line 105)
* gdbarch_print_insn:                    Defining Other Architecture Features.
                                                              (line 513)
* gdbarch_ptr_bit:                       Defining Other Architecture Features.
                                                              (line 493)
* gdbarch_push_dummy_call:               Defining Other Architecture Features.
                                                              (line 363)
* gdbarch_push_dummy_code:               Defining Other Architecture Features.
                                                              (line 375)
* gdbarch_register <1>:                  Adding a New Target. (line  40)
* gdbarch_register:                      How an Architecture is Represented.
                                                              (line  19)
* gdbarch_register_osabi:                OS ABI Variant Handling.
                                                              (line 103)
* gdbarch_register_osabi_sniffer:        OS ABI Variant Handling.
                                                              (line 112)
* gdbarch_register_to_value <1>:         Defining Other Architecture Features.
                                                              (line 301)
* gdbarch_register_to_value:             Register and Memory Data.
                                                              (line  46)
* gdbarch_return_value:                  Defining Other Architecture Features.
                                                              (line 394)
* gdbarch_sdb_reg_to_regnum:             Defining Other Architecture Features.
                                                              (line 390)
* gdbarch_short_bit:                     Defining Other Architecture Features.
                                                              (line 497)
* gdbarch_skip_permanent_breakpoint:     Defining Other Architecture Features.
                                                              (line 430)
* gdbarch_skip_trampoline_code:          Defining Other Architecture Features.
                                                              (line 441)
* gdbarch_stab_reg_to_regnum:            Defining Other Architecture Features.
                                                              (line 450)
* gdbarch_stabs_argument_has_addr:       Defining Other Architecture Features.
                                                              (line 359)
* gdbarch_tdep definition:               Creating a New Architecture.
                                                              (line  34)
* gdbarch_tdep when allocating new gdbarch: Creating a New Architecture.
                                                              (line   6)
* gdbarch_value_to_register <1>:         Defining Other Architecture Features.
                                                              (line 529)
* gdbarch_value_to_register:             Register and Memory Data.
                                                              (line  62)
* gdbarch_virtual_frame_pointer:         Defining Other Architecture Features.
                                                              (line 501)
* GDBINIT_FILENAME:                      Host Definition.     (line  74)
* generic host support:                  Host Definition.     (line  38)
* generic_elf_osabi_sniff_abi_tag_sections: OS ABI Variant Handling.
                                                              (line 133)
* get_frame_register:                    Stack Frames.        (line  15)
* get_frame_type:                        Stack Frames.        (line  22)
* hardware breakpoints:                  Algorithms.          (line 158)
* hardware watchpoints:                  Algorithms.          (line 280)
* HAVE_CONTINUABLE_WATCHPOINT:           Algorithms.          (line 402)
* HAVE_DOS_BASED_FILE_SYSTEM:            Coding.              (line 561)
* HAVE_STEPPABLE_WATCHPOINT:             Algorithms.          (line 386)
* host:                                  Overall Structure.   (line  50)
* host, adding:                          Host Definition.     (line  13)
* i386_cleanup_dregs:                    Algorithms.          (line 576)
* I386_DR_LOW_GET_STATUS:                Algorithms.          (line 489)
* I386_DR_LOW_RESET_ADDR:                Algorithms.          (line 485)
* I386_DR_LOW_SET_ADDR:                  Algorithms.          (line 482)
* I386_DR_LOW_SET_CONTROL:               Algorithms.          (line 479)
* i386_insert_hw_breakpoint:             Algorithms.          (line 564)
* i386_insert_watchpoint:                Algorithms.          (line 536)
* i386_region_ok_for_watchpoint:         Algorithms.          (line 514)
* i386_remove_hw_breakpoint:             Algorithms.          (line 564)
* i386_remove_watchpoint:                Algorithms.          (line 536)
* i386_stopped_by_watchpoint:            Algorithms.          (line 528)
* i386_stopped_data_address:             Algorithms.          (line 521)
* I386_USE_GENERIC_WATCHPOINTS:          Algorithms.          (line 461)
* in_dynsym_resolve_code:                Defining Other Architecture Features.
                                                              (line 263)
* inferior_added:                        GDB Observers.       (line 169)
* inferior_appeared:                     GDB Observers.       (line 173)
* inferior_created:                      GDB Observers.       (line  92)
* inferior_exit:                         GDB Observers.       (line 176)
* inferior_removed:                      GDB Observers.       (line 180)
* inner_than:                            Functions and Variable to Analyze Frames.
                                                              (line  30)
* innermost frame:                       Frame Handling Terminology.
                                                              (line  24)
* insert or remove hardware breakpoint:  Algorithms.          (line 234)
* insert or remove hardware watchpoint:  Algorithms.          (line 347)
* insert or remove software breakpoint:  Algorithms.          (line 211)
* IS_ABSOLUTE_PATH:                      Coding.              (line 572)
* IS_DIR_SEPARATOR:                      Coding.              (line 567)
* ISATTY:                                Host Definition.     (line  99)
* item output functions:                 User Interface.      (line 254)
* language parser:                       Language Support.    (line  25)
* language support:                      Language Support.    (line   6)
* legal papers for code contributions:   Debugging GDB.       (line  42)
* length_of_subexp:                      Language Support.    (line  58)
* libgdb:                                libgdb.              (line   9)
* libiberty library:                     Support Libraries.   (line  52)
* line wrap in output:                   Coding.              (line 191)
* lint:                                  Host Definition.     (line 119)
* list output functions:                 User Interface.      (line 131)
* LITTLE_BREAKPOINT:                     Defining Other Architecture Features.
                                                              (line 100)
* long long data type:                   Host Definition.     (line 106)
* longjmp debugging:                     Algorithms.          (line 258)
* lookup_symbol:                         Symbol Handling.     (line 142)
* LSEEK_NOT_LINEAR:                      Host Definition.     (line 114)
* lval_type enumeration, for values.:    Values.              (line  19)
* make_cleanup:                          Coding.              (line  28)
* make_cleanup_ui_out_list_begin_end:    User Interface.      (line 247)
* make_cleanup_ui_out_tuple_begin_end:   User Interface.      (line 223)
* making a new release of gdb:           Releasing GDB.       (line   6)
* memory representation:                 Register and Memory Data.
                                                              (line   6)
* memory_changed:                        GDB Observers.       (line 185)
* minimal symbol table:                  Symbol Handling.     (line 111)
* minsymtabs:                            Symbol Handling.     (line 111)
* multi-arch data:                       Coding.              (line 100)
* NATDEPFILES:                           Native Debugging.    (line   8)
* native conditionals:                   Native Debugging.    (line  75)
* native debugging:                      Native Debugging.    (line   6)
* nesting level in ui_out functions:     User Interface.      (line 143)
* new year procedure:                    Start of New Year Procedure.
                                                              (line   6)
* new_objfile:                           GDB Observers.       (line 109)
* new_thread:                            GDB Observers.       (line 114)
* NEXT frame:                            Frame Handling Terminology.
                                                              (line  11)
* normal_stop:                           GDB Observers.       (line  76)
* normal_stop observer:                  GDB Observers.       (line  48)
* notification about inferior execution stop: GDB Observers.  (line  48)
* notifications about changes in internals: Algorithms.       (line 630)
* object file formats:                   Symbol Handling.     (line 215)
* observer pattern interface:            Algorithms.          (line 630)
* observers implementation rationale:    GDB Observers.       (line   9)
* obstacks:                              Support Libraries.   (line  69)
* op_print_tab:                          Language Support.    (line  91)
* opcodes library:                       Support Libraries.   (line  39)
* OS ABI variants:                       OS ABI Variant Handling.
                                                              (line   6)
* parse_exp_1:                           Language Support.    (line  97)
* partial symbol table:                  Symbol Handling.     (line 114)
* pc_regnum:                             Register Architecture Functions & Variables.
                                                              (line  58)
* PE-COFF format:                        Symbol Handling.     (line 272)
* per-architecture module data:          Coding.              (line 100)
* pointer representation:                Pointers and Addresses.
                                                              (line   6)
* portability:                           Coding.              (line 535)
* portable file name handling:           Coding.              (line 552)
* porting to new machines:               Porting GDB.         (line   6)
* prefixify_subexp:                      Language Support.    (line  58)
* PREVIOUS frame:                        Frame Handling Terminology.
                                                              (line  14)
* print_float_info:                      Register Information Functions.
                                                              (line  80)
* print_registers_info:                  Register Information Functions.
                                                              (line  53)
* print_subexp:                          Language Support.    (line  91)
* print_vector_info:                     Register Information Functions.
                                                              (line  96)
* PRINTF_HAS_LONG_LONG:                  Host Definition.     (line 109)
* processor status register:             Register Architecture Functions & Variables.
                                                              (line  69)
* program counter <1>:                   Register Architecture Functions & Variables.
                                                              (line  58)
* program counter:                       Algorithms.          (line 158)
* prologue analysis:                     Algorithms.          (line  14)
* prologue cache:                        Prologue Caches.     (line  12)
* prologue of a function:                Prologue Caches.     (line   6)
* prologue-value.c:                      Algorithms.          (line  48)
* prompt:                                Host Definition.     (line  94)
* ps_regnum:                             Register Architecture Functions & Variables.
                                                              (line  69)
* pseudo-evaluation of function prologues: Algorithms.        (line  48)
* pseudo_register_read:                  Register Architecture Functions & Variables.
                                                              (line  29)
* pseudo_register_write:                 Register Architecture Functions & Variables.
                                                              (line  33)
* psymtabs:                              Symbol Handling.     (line 107)
* push_dummy_call:                       Functions Creating Dummy Frames.
                                                              (line  13)
* push_dummy_code:                       Functions Creating Dummy Frames.
                                                              (line  57)
* raw register representation:           Raw and Cooked Registers.
                                                              (line   6)
* read_pc:                               Register Architecture Functions & Variables.
                                                              (line  10)
* reading of symbols:                    Symbol Handling.     (line  25)
* readline library:                      Support Libraries.   (line  45)
* regcache_cooked_read:                  Register Caching.    (line  23)
* regcache_cooked_read_signed:           Register Caching.    (line  23)
* regcache_cooked_read_unsigned:         Register Caching.    (line  23)
* regcache_cooked_write:                 Register Caching.    (line  23)
* regcache_cooked_write_signed:          Register Caching.    (line  23)
* regcache_cooked_write_unsigned:        Register Caching.    (line  23)
* register caching:                      Register Caching.    (line   6)
* register data formats, converting:     Register and Memory Data.
                                                              (line   6)
* register representation:               Register and Memory Data.
                                                              (line   6)
* REGISTER_CONVERT_TO_RAW:               Defining Other Architecture Features.
                                                              (line 311)
* REGISTER_CONVERT_TO_VIRTUAL:           Defining Other Architecture Features.
                                                              (line 306)
* register_name:                         Register Information Functions.
                                                              (line  10)
* register_reggroup_p:                   Register Information Functions.
                                                              (line 110)
* register_type:                         Register Information Functions.
                                                              (line  33)
* regset_from_core_section:              Defining Other Architecture Features.
                                                              (line 316)
* regular expressions library:           Support Libraries.   (line 110)
* Release Branches:                      Versions and Branches.
                                                              (line  93)
* remote debugging support:              Host Definition.     (line  41)
* REMOTE_BPT_VECTOR:                     Defining Other Architecture Features.
                                                              (line 540)
* representation of architecture:        How an Architecture is Represented.
                                                              (line   6)
* representations, raw and cooked registers: Raw and Cooked Registers.
                                                              (line   6)
* representations, register and memory:  Register and Memory Data.
                                                              (line   6)
* requirements for GDB:                  Requirements.        (line   6)
* restart:                               Algorithms.          (line 600)
* running the test suite:                Testsuite.           (line  19)
* secondary symbol file:                 Symbol Handling.     (line  47)
* sentinel frame <1>:                    Frame Handling Terminology.
                                                              (line  52)
* sentinel frame:                        Stack Frames.        (line  22)
* SENTINEL_FRAME:                        Stack Frames.        (line  22)
* separate data and code address spaces: Pointers and Addresses.
                                                              (line   6)
* serial line support:                   Host Definition.     (line  41)
* set_gdbarch functions:                 Creating a New Architecture.
                                                              (line  14)
* set_gdbarch_bits_big_endian:           Defining Other Architecture Features.
                                                              (line  83)
* set_gdbarch_sofun_address_maybe_missing: Defining Other Architecture Features.
                                                              (line 330)
* SIGWINCH_HANDLER:                      Host Definition.     (line  78)
* SIGWINCH_HANDLER_BODY:                 Host Definition.     (line  82)
* skip_prologue:                         Functions and Variable to Analyze Frames.
                                                              (line  12)
* SKIP_SOLIB_RESOLVER:                   Defining Other Architecture Features.
                                                              (line 267)
* SLASH_STRING:                          Coding.              (line 589)
* sniffing:                              Frame Handling Terminology.
                                                              (line  46)
* software breakpoints:                  Algorithms.          (line 184)
* software watchpoints:                  Algorithms.          (line 280)
* SOFTWARE_SINGLE_STEP:                  Defining Other Architecture Features.
                                                              (line 324)
* SOFTWARE_SINGLE_STEP_P:                Defining Other Architecture Features.
                                                              (line 320)
* SOLIB_ADD:                             Native Debugging.    (line  86)
* SOLIB_CREATE_INFERIOR_HOOK:            Native Debugging.    (line  92)
* solib_loaded:                          GDB Observers.       (line  99)
* solib_unloaded:                        GDB Observers.       (line 104)
* SOM debugging info:                    Symbol Handling.     (line 360)
* SOM format:                            Symbol Handling.     (line 291)
* source code formatting:                Coding.              (line 323)
* sp_regnum:                             Register Architecture Functions & Variables.
                                                              (line  49)
* spaces, separate data and code address: Pointers and Addresses.
                                                              (line   6)
* stabs debugging info:                  Symbol Handling.     (line 305)
* stack frame, definition of base of a frame: Frame Handling Terminology.
                                                              (line  28)
* stack frame, definition of innermost frame: Frame Handling Terminology.
                                                              (line  24)
* stack frame, definition of NEXT frame: Frame Handling Terminology.
                                                              (line  11)
* stack frame, definition of PREVIOUS frame: Frame Handling Terminology.
                                                              (line  14)
* stack frame, definition of sentinel frame: Frame Handling Terminology.
                                                              (line  52)
* stack frame, definition of sniffing:   Frame Handling Terminology.
                                                              (line  46)
* stack frame, definition of THIS frame: Frame Handling Terminology.
                                                              (line   9)
* stack frame, definition of unwinding:  Frame Handling Terminology.
                                                              (line  41)
* stack pointer:                         Register Architecture Functions & Variables.
                                                              (line  49)
* START_INFERIOR_TRAPS_EXPECTED:         Native Debugging.    (line  96)
* status register:                       Register Architecture Functions & Variables.
                                                              (line  69)
* STOPPED_BY_WATCHPOINT:                 Algorithms.          (line 408)
* store_typed_address:                   Pointers and Addresses.
                                                              (line  70)
* struct:                                GDB Observers.       (line  62)
* struct gdbarch creation:               Creating a New Architecture.
                                                              (line   6)
* struct regcache:                       Register Caching.    (line  10)
* struct value, converting register contents to: Register and Memory Data.
                                                              (line   6)
* submitting patches:                    Debugging GDB.       (line  30)
* sym_fns structure:                     Symbol Handling.     (line  37)
* symbol files:                          Symbol Handling.     (line  25)
* symbol lookup:                         Symbol Handling.     (line 133)
* symbol reading:                        Symbol Handling.     (line  25)
* SYMBOL_RELOADING_DEFAULT:              Defining Other Architecture Features.
                                                              (line 454)
* symtabs:                               Symbol Handling.     (line 104)
* system dependencies:                   Coding.              (line 539)
* table output functions:                User Interface.      (line 131)
* target:                                Overall Structure.   (line  50)
* target architecture definition:        Target Architecture Definition.
                                                              (line   6)
* target dependent files:                Adding a New Target. (line   8)
* target descriptions:                   Target Descriptions. (line   6)
* target descriptions, adding register support: Adding Target Described Register Support.
                                                              (line   6)
* target descriptions, implementation:   Target Descriptions Implementation.
                                                              (line   6)
* target vector:                         Target Vector Definition.
                                                              (line   6)
* TARGET_CAN_USE_HARDWARE_WATCHPOINT:    Algorithms.          (line 333)
* target_changed:                        GDB Observers.       (line  82)
* TARGET_CHAR_BIT:                       Defining Other Architecture Features.
                                                              (line 458)
* target_insert_breakpoint:              Algorithms.          (line 211)
* target_insert_hw_breakpoint:           Algorithms.          (line 234)
* target_insert_watchpoint:              Algorithms.          (line 347)
* TARGET_REGION_OK_FOR_HW_WATCHPOINT:    Algorithms.          (line 343)
* target_remove_breakpoint:              Algorithms.          (line 211)
* target_remove_hw_breakpoint:           Algorithms.          (line 234)
* target_remove_watchpoint:              Algorithms.          (line 347)
* target_resumed:                        GDB Observers.       (line 129)
* target_stopped_data_address:           Algorithms.          (line 364)
* target_watchpoint_addr_within_range:   Algorithms.          (line 378)
* targets:                               Existing Targets.    (line   6)
* TCP remote support:                    Host Definition.     (line  57)
* terminal device:                       Host Definition.     (line  97)
* test suite:                            Testsuite.           (line   6)
* test suite organization:               Testsuite.           (line 195)
* test_notification:                     GDB Observers.       (line 189)
* Testsuite Configuration:               Testsuite.           (line 167)
* THIS frame:                            Frame Handling Terminology.
                                                              (line   9)
* thread_exit:                           GDB Observers.       (line 117)
* thread_ptid_changed:                   GDB Observers.       (line 165)
* thread_stop_requested:                 GDB Observers.       (line 122)
* tracepoint_created:                    GDB Observers.       (line 148)
* tracepoint_deleted:                    GDB Observers.       (line 152)
* tracepoint_modified:                   GDB Observers.       (line 156)
* tuple output functions:                User Interface.      (line 131)
* type codes:                            Symbol Handling.     (line 191)
* types:                                 Coding.              (line 405)
* ui_out functions:                      User Interface.      (line  47)
* ui_out functions, usage examples:      User Interface.      (line 398)
* ui_out_field_core_addr:                User Interface.      (line 287)
* ui_out_field_fmt:                      User Interface.      (line 261)
* ui_out_field_fmt_int:                  User Interface.      (line 280)
* ui_out_field_int:                      User Interface.      (line 273)
* ui_out_field_skip:                     User Interface.      (line 352)
* ui_out_field_stream:                   User Interface.      (line 320)
* ui_out_field_string:                   User Interface.      (line 291)
* ui_out_flush:                          User Interface.      (line 392)
* ui_out_list_begin:                     User Interface.      (line 234)
* ui_out_list_end:                       User Interface.      (line 240)
* ui_out_message:                        User Interface.      (line 376)
* ui_out_spaces:                         User Interface.      (line 371)
* ui_out_stream_delete:                  User Interface.      (line 315)
* ui_out_stream_new:                     User Interface.      (line 309)
* ui_out_table_begin:                    User Interface.      (line 165)
* ui_out_table_body:                     User Interface.      (line 191)
* ui_out_table_end:                      User Interface.      (line 194)
* ui_out_table_header:                   User Interface.      (line 178)
* ui_out_text:                           User Interface.      (line 358)
* ui_out_tuple_begin:                    User Interface.      (line 210)
* ui_out_tuple_end:                      User Interface.      (line 216)
* ui_out_wrap_hint:                      User Interface.      (line 382)
* unwind frame:                          Stack Frames.        (line   9)
* unwind_dummy_id:                       Functions Creating Dummy Frames.
                                                              (line  38)
* unwind_pc:                             Functions to Access Frame Data.
                                                              (line  11)
* unwind_sp:                             Functions to Access Frame Data.
                                                              (line  27)
* unwinding:                             Frame Handling Terminology.
                                                              (line  41)
* using ui_out functions:                User Interface.      (line 398)
* value structure:                       Values.              (line   9)
* value_as_address:                      Pointers and Addresses.
                                                              (line  84)
* value_from_pointer:                    Pointers and Addresses.
                                                              (line  93)
* values:                                Values.              (line   9)
* VEC:                                   Support Libraries.   (line 131)
* vendor branches:                       Versions and Branches.
                                                              (line 108)
* void:                                  GDB Observers.       (line  67)
* volatile:                              Host Definition.     (line 122)
* watchpoints:                           Algorithms.          (line 274)
* watchpoints, on x86:                   Algorithms.          (line 449)
* watchpoints, with threads:             Algorithms.          (line 425)
* word-addressed machines:               Pointers and Addresses.
                                                              (line   6)
* wrap_here:                             Coding.              (line 191)
* write_pc:                              Register Architecture Functions & Variables.
                                                              (line  13)
* writing tests:                         Testsuite.           (line 247)
* x86 debug registers:                   Algorithms.          (line 449)
* XCOFF format:                          Symbol Handling.     (line 256)


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