mirror of
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3666a04883
This commits the result of running gdb/copyright.py as per our Start
of New Year procedure...
gdb/ChangeLog
Update copyright year range in copyright header of all GDB files.
633 lines
20 KiB
C++
633 lines
20 KiB
C++
/* *INDENT-OFF* */ /* ATTRIBUTE_PRINTF confuses indent, avoid running it
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for now. */
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/* Basic, host-specific, and target-specific definitions for GDB.
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Copyright (C) 1986-2021 Free Software Foundation, Inc.
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This file is part of GDB.
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||
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This program is free software; you can redistribute it and/or modify
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||
it under the terms of the GNU General Public License as published by
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||
the Free Software Foundation; either version 3 of the License, or
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||
(at your option) any later version.
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||
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||
This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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||
GNU General Public License for more details.
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||
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||
You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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||
#ifndef DEFS_H
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#define DEFS_H
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||
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||
#ifdef GDBSERVER
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# error gdbserver should not include gdb/defs.h
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#endif
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#include "gdbsupport/common-defs.h"
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||
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#undef PACKAGE
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||
#undef PACKAGE_NAME
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#undef PACKAGE_VERSION
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#undef PACKAGE_STRING
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#undef PACKAGE_TARNAME
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||
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#include <config.h>
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#include "bfd.h"
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#include <sys/types.h>
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#include <limits.h>
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/* The libdecnumber library, on which GDB depends, includes a header file
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called gstdint.h instead of relying directly on stdint.h. GDB, on the
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other hand, includes stdint.h directly, relying on the fact that gnulib
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generates a copy if the system doesn't provide one or if it is missing
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some features. Unfortunately, gstdint.h and stdint.h cannot be included
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at the same time, which may happen when we include a file from
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libdecnumber.
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The following macro definition effectively prevents the inclusion of
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gstdint.h, as all the definitions it provides are guarded against
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the GCC_GENERATED_STDINT_H macro. We already have gnulib/stdint.h
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included, so it's ok to blank out gstdint.h. */
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#define GCC_GENERATED_STDINT_H 1
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#include <unistd.h>
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#include <fcntl.h>
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#include "gdb_wchar.h"
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#include "ui-file.h"
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#include "gdbsupport/host-defs.h"
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#include "gdbsupport/enum-flags.h"
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/* Scope types enumerator. List the types of scopes the compiler will
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accept. */
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enum compile_i_scope_types
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{
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COMPILE_I_INVALID_SCOPE,
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/* A simple scope. Wrap an expression into a simple scope that
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takes no arguments, returns no value, and uses the generic
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function name "_gdb_expr". */
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COMPILE_I_SIMPLE_SCOPE,
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/* Do not wrap the expression,
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it has to provide function "_gdb_expr" on its own. */
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COMPILE_I_RAW_SCOPE,
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/* A printable expression scope. Wrap an expression into a scope
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suitable for the "compile print" command. It uses the generic
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function name "_gdb_expr". COMPILE_I_PRINT_ADDRESS_SCOPE variant
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is the usual one, taking address of the object.
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COMPILE_I_PRINT_VALUE_SCOPE is needed for arrays where the array
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name already specifies its address. See get_out_value_type. */
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COMPILE_I_PRINT_ADDRESS_SCOPE,
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COMPILE_I_PRINT_VALUE_SCOPE,
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};
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template<typename T>
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using RequireLongest = gdb::Requires<gdb::Or<std::is_same<T, LONGEST>,
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std::is_same<T, ULONGEST>>>;
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/* Just in case they're not defined in stdio.h. */
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#ifndef SEEK_SET
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#define SEEK_SET 0
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#endif
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#ifndef SEEK_CUR
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#define SEEK_CUR 1
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#endif
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/* The O_BINARY flag is defined in fcntl.h on some non-Posix platforms.
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It is used as an access modifier in calls to open(), where it acts
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similarly to the "b" character in fopen()'s MODE argument. On Posix
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platforms it should be a no-op, so it is defined as 0 here. This
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ensures that the symbol may be used freely elsewhere in gdb. */
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#ifndef O_BINARY
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#define O_BINARY 0
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#endif
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#include "hashtab.h"
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/* * Enable dbx commands if set. */
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extern int dbx_commands;
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/* * System root path, used to find libraries etc. */
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extern char *gdb_sysroot;
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/* * GDB datadir, used to store data files. */
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extern std::string gdb_datadir;
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/* * If not empty, the possibly relocated path to python's "lib" directory
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specified with --with-python. */
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extern std::string python_libdir;
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/* * Search path for separate debug files. */
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extern char *debug_file_directory;
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/* GDB's SIGINT handler basically sets a flag; code that might take a
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long time before it gets back to the event loop, and which ought to
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be interruptible, checks this flag using the QUIT macro, which, if
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GDB has the terminal, throws a quit exception.
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In addition to setting a flag, the SIGINT handler also marks a
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select/poll-able file descriptor as read-ready. That is used by
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interruptible_select in order to support interrupting blocking I/O
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in a race-free manner.
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These functions use the extension_language_ops API to allow extension
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language(s) and GDB SIGINT handling to coexist seamlessly. */
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/* * Evaluate to non-zero if the quit flag is set, zero otherwise. This
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will clear the quit flag as a side effect. */
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extern int check_quit_flag (void);
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/* * Set the quit flag. */
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extern void set_quit_flag (void);
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/* The current quit handler (and its type). This is called from the
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QUIT macro. See default_quit_handler below for default behavior.
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Parts of GDB temporarily override this to e.g., completely suppress
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Ctrl-C because it would not be safe to throw. E.g., normally, you
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wouldn't want to quit between a RSP command and its response, as
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that would break the communication with the target, but you may
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still want to intercept the Ctrl-C and offer to disconnect if the
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user presses Ctrl-C multiple times while the target is stuck
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waiting for the wedged remote stub. */
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typedef void (quit_handler_ftype) (void);
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extern quit_handler_ftype *quit_handler;
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/* The default quit handler. Checks whether Ctrl-C was pressed, and
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if so:
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- If GDB owns the terminal, throws a quit exception.
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- If GDB does not own the terminal, forwards the Ctrl-C to the
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target.
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*/
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extern void default_quit_handler (void);
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/* Flag that function quit should call quit_force. */
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extern volatile int sync_quit_force_run;
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extern void quit (void);
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/* Helper for the QUIT macro. */
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extern void maybe_quit (void);
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/* Check whether a Ctrl-C was typed, and if so, call the current quit
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handler. */
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#define QUIT maybe_quit ()
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/* Set the serial event associated with the quit flag. */
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extern void quit_serial_event_set (void);
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/* Clear the serial event associated with the quit flag. */
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extern void quit_serial_event_clear (void);
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/* * Languages represented in the symbol table and elsewhere.
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This should probably be in language.h, but since enum's can't
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be forward declared to satisfy opaque references before their
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actual definition, needs to be here.
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The constants here are in priority order. In particular,
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demangling is attempted according to this order.
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Note that there's ambiguity between the mangling schemes of some of
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these languages, so some symbols could be successfully demangled by
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several languages. For that reason, the constants here are sorted
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in the order we'll attempt demangling them. For example: Rust uses
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C++ mangling, so must come after C++; Ada must come last (see
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ada_sniff_from_mangled_name). (Keep this order in sync with the
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'languages' array in language.c.) */
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enum language
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{
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language_unknown, /* Language not known */
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language_auto, /* Placeholder for automatic setting */
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language_c, /* C */
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language_objc, /* Objective-C */
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language_cplus, /* C++ */
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language_d, /* D */
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language_go, /* Go */
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language_fortran, /* Fortran */
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language_m2, /* Modula-2 */
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language_asm, /* Assembly language */
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language_pascal, /* Pascal */
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language_opencl, /* OpenCL */
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language_rust, /* Rust */
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language_minimal, /* All other languages, minimal support only */
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language_ada, /* Ada */
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nr_languages
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};
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/* The number of bits needed to represent all languages, with enough
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padding to allow for reasonable growth. */
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#define LANGUAGE_BITS 5
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gdb_static_assert (nr_languages <= (1 << LANGUAGE_BITS));
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enum precision_type
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{
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single_precision,
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double_precision,
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unspecified_precision
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};
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/* * A generic, not quite boolean, enumeration. This is used for
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set/show commands in which the options are on/off/automatic. */
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enum auto_boolean
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{
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AUTO_BOOLEAN_TRUE,
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AUTO_BOOLEAN_FALSE,
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AUTO_BOOLEAN_AUTO
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};
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/* * Potential ways that a function can return a value of a given
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type. */
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enum return_value_convention
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{
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/* * Where the return value has been squeezed into one or more
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registers. */
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RETURN_VALUE_REGISTER_CONVENTION,
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/* * Commonly known as the "struct return convention". The caller
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passes an additional hidden first parameter to the caller. That
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parameter contains the address at which the value being returned
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should be stored. While typically, and historically, used for
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large structs, this is convention is applied to values of many
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different types. */
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RETURN_VALUE_STRUCT_CONVENTION,
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/* * Like the "struct return convention" above, but where the ABI
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guarantees that the called function stores the address at which
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the value being returned is stored in a well-defined location,
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such as a register or memory slot in the stack frame. Don't use
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this if the ABI doesn't explicitly guarantees this. */
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RETURN_VALUE_ABI_RETURNS_ADDRESS,
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/* * Like the "struct return convention" above, but where the ABI
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guarantees that the address at which the value being returned is
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stored will be available in a well-defined location, such as a
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register or memory slot in the stack frame. Don't use this if
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the ABI doesn't explicitly guarantees this. */
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RETURN_VALUE_ABI_PRESERVES_ADDRESS,
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};
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/* Needed for various prototypes */
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struct symtab;
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struct breakpoint;
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struct frame_info;
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struct gdbarch;
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struct value;
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/* From main.c. */
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/* This really belong in utils.c (path-utils.c?), but it references some
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globals that are currently only available to main.c. */
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extern std::string relocate_gdb_directory (const char *initial, bool relocatable);
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/* Annotation stuff. */
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extern int annotation_level; /* in stack.c */
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/* From regex.c or libc. BSD 4.4 declares this with the argument type as
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"const char *" in unistd.h, so we can't declare the argument
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as "char *". */
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EXTERN_C char *re_comp (const char *);
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/* From symfile.c */
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extern void symbol_file_command (const char *, int);
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/* From top.c */
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typedef void initialize_file_ftype (void);
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extern char *gdb_readline_wrapper (const char *);
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extern const char *command_line_input (const char *, const char *);
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extern void print_prompt (void);
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struct ui;
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extern int input_interactive_p (struct ui *);
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extern bool info_verbose;
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/* From printcmd.c */
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extern void set_next_address (struct gdbarch *, CORE_ADDR);
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extern int print_address_symbolic (struct gdbarch *, CORE_ADDR,
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struct ui_file *, int,
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const char *);
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extern void print_address (struct gdbarch *, CORE_ADDR, struct ui_file *);
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extern const char *pc_prefix (CORE_ADDR);
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/* From exec.c */
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/* * Process memory area starting at ADDR with length SIZE. Area is
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readable iff READ is non-zero, writable if WRITE is non-zero,
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executable if EXEC is non-zero. Area is possibly changed against
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its original file based copy if MODIFIED is non-zero. DATA is
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passed without changes from a caller. */
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typedef int (*find_memory_region_ftype) (CORE_ADDR addr, unsigned long size,
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int read, int write, int exec,
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int modified, void *data);
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/* * Possible lvalue types. Like enum language, this should be in
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value.h, but needs to be here for the same reason. */
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enum lval_type
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{
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/* * Not an lval. */
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not_lval,
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/* * In memory. */
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lval_memory,
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/* * In a register. Registers are relative to a frame. */
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lval_register,
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/* * In a gdb internal variable. */
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lval_internalvar,
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/* * Value encapsulates a callable defined in an extension language. */
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lval_xcallable,
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/* * Part of a gdb internal variable (structure field). */
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lval_internalvar_component,
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/* * Value's bits are fetched and stored using functions provided
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by its creator. */
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lval_computed
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};
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/* * Parameters of the "info proc" command. */
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enum info_proc_what
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{
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/* * Display the default cmdline, cwd and exe outputs. */
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IP_MINIMAL,
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/* * Display `info proc mappings'. */
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IP_MAPPINGS,
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/* * Display `info proc status'. */
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IP_STATUS,
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/* * Display `info proc stat'. */
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IP_STAT,
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/* * Display `info proc cmdline'. */
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IP_CMDLINE,
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/* * Display `info proc exe'. */
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IP_EXE,
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/* * Display `info proc cwd'. */
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IP_CWD,
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/* * Display `info proc files'. */
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IP_FILES,
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/* * Display all of the above. */
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IP_ALL
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};
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/* * Default radixes for input and output. Only some values supported. */
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extern unsigned input_radix;
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extern unsigned output_radix;
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/* * Possibilities for prettyformat parameters to routines which print
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things. Like enum language, this should be in value.h, but needs
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to be here for the same reason. FIXME: If we can eliminate this
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as an arg to LA_VAL_PRINT, then we can probably move it back to
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value.h. */
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enum val_prettyformat
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{
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Val_no_prettyformat = 0,
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Val_prettyformat,
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/* * Use the default setting which the user has specified. */
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Val_prettyformat_default
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};
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/* * Optional native machine support. Non-native (and possibly pure
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multi-arch) targets do not need a "nm.h" file. This will be a
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symlink to one of the nm-*.h files, built by the `configure'
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script. */
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#ifdef GDB_NM_FILE
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#include "nm.h"
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#endif
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||
/* Assume that fopen accepts the letter "b" in the mode string.
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||
It is demanded by ISO C9X, and should be supported on all
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||
platforms that claim to have a standard-conforming C library. On
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||
true POSIX systems it will be ignored and have no effect. There
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||
may still be systems without a standard-conforming C library where
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an ISO C9X compiler (GCC) is available. Known examples are SunOS
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||
4.x and 4.3BSD. This assumption means these systems are no longer
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supported. */
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#ifndef FOPEN_RB
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||
# include "fopen-bin.h"
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#endif
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/* Defaults for system-wide constants (if not defined by xm.h, we fake it).
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||
FIXME: Assumes 2's complement arithmetic. */
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||
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||
#if !defined (UINT_MAX)
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||
#define UINT_MAX ((unsigned int)(~0)) /* 0xFFFFFFFF for 32-bits */
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||
#endif
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||
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||
#if !defined (INT_MAX)
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#define INT_MAX ((int)(UINT_MAX >> 1)) /* 0x7FFFFFFF for 32-bits */
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||
#endif
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#if !defined (INT_MIN)
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#define INT_MIN ((int)((int) ~0 ^ INT_MAX)) /* 0x80000000 for 32-bits */
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#endif
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#if !defined (ULONG_MAX)
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#define ULONG_MAX ((unsigned long)(~0L)) /* 0xFFFFFFFF for 32-bits */
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#endif
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||
#if !defined (LONG_MAX)
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||
#define LONG_MAX ((long)(ULONG_MAX >> 1)) /* 0x7FFFFFFF for 32-bits */
|
||
#endif
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||
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#if !defined (ULONGEST_MAX)
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#define ULONGEST_MAX (~(ULONGEST)0) /* 0xFFFFFFFFFFFFFFFF for 64-bits */
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#endif
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||
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||
#if !defined (LONGEST_MAX) /* 0x7FFFFFFFFFFFFFFF for 64-bits */
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||
#define LONGEST_MAX ((LONGEST)(ULONGEST_MAX >> 1))
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||
#endif
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||
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||
/* * Convert a LONGEST to an int. This is used in contexts (e.g. number of
|
||
arguments to a function, number in a value history, register number, etc.)
|
||
where the value must not be larger than can fit in an int. */
|
||
|
||
extern int longest_to_int (LONGEST);
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||
|
||
/* Enumerate the requirements a symbol has in order to be evaluated.
|
||
These are listed in order of "strength" -- a later entry subsumes
|
||
earlier ones. This fine-grained distinction is important because
|
||
it allows for the evaluation of a TLS symbol during unwinding --
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||
when unwinding one has access to registers, but not the frame
|
||
itself, because that is being constructed. */
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||
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||
enum symbol_needs_kind
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||
{
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||
/* No special requirements -- just memory. */
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||
SYMBOL_NEEDS_NONE,
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||
|
||
/* The symbol needs registers. */
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||
SYMBOL_NEEDS_REGISTERS,
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||
|
||
/* The symbol needs a frame. */
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||
SYMBOL_NEEDS_FRAME
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||
};
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||
|
||
/* In findvar.c. */
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||
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||
template<typename T, typename = RequireLongest<T>>
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||
T extract_integer (const gdb_byte *addr, int len, enum bfd_endian byte_order);
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||
|
||
static inline LONGEST
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||
extract_signed_integer (const gdb_byte *addr, int len,
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||
enum bfd_endian byte_order)
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||
{
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||
return extract_integer<LONGEST> (addr, len, byte_order);
|
||
}
|
||
|
||
static inline ULONGEST
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||
extract_unsigned_integer (const gdb_byte *addr, int len,
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||
enum bfd_endian byte_order)
|
||
{
|
||
return extract_integer<ULONGEST> (addr, len, byte_order);
|
||
}
|
||
|
||
extern int extract_long_unsigned_integer (const gdb_byte *, int,
|
||
enum bfd_endian, LONGEST *);
|
||
|
||
extern CORE_ADDR extract_typed_address (const gdb_byte *buf,
|
||
struct type *type);
|
||
|
||
/* All 'store' functions accept a host-format integer and store a
|
||
target-format integer at ADDR which is LEN bytes long. */
|
||
|
||
template<typename T, typename = RequireLongest<T>>
|
||
extern void store_integer (gdb_byte *addr, int len, enum bfd_endian byte_order,
|
||
T val);
|
||
|
||
static inline void
|
||
store_signed_integer (gdb_byte *addr, int len,
|
||
enum bfd_endian byte_order, LONGEST val)
|
||
{
|
||
return store_integer (addr, len, byte_order, val);
|
||
}
|
||
|
||
static inline void
|
||
store_unsigned_integer (gdb_byte *addr, int len,
|
||
enum bfd_endian byte_order, ULONGEST val)
|
||
{
|
||
return store_integer (addr, len, byte_order, val);
|
||
}
|
||
|
||
extern void store_typed_address (gdb_byte *buf, struct type *type,
|
||
CORE_ADDR addr);
|
||
|
||
extern void copy_integer_to_size (gdb_byte *dest, int dest_size,
|
||
const gdb_byte *source, int source_size,
|
||
bool is_signed, enum bfd_endian byte_order);
|
||
|
||
/* Hooks for alternate command interfaces. */
|
||
|
||
struct target_waitstatus;
|
||
struct cmd_list_element;
|
||
|
||
extern void (*deprecated_pre_add_symbol_hook) (const char *);
|
||
extern void (*deprecated_post_add_symbol_hook) (void);
|
||
extern void (*selected_frame_level_changed_hook) (int);
|
||
extern int (*deprecated_ui_loop_hook) (int signo);
|
||
extern void (*deprecated_show_load_progress) (const char *section,
|
||
unsigned long section_sent,
|
||
unsigned long section_size,
|
||
unsigned long total_sent,
|
||
unsigned long total_size);
|
||
extern void (*deprecated_print_frame_info_listing_hook) (struct symtab * s,
|
||
int line,
|
||
int stopline,
|
||
int noerror);
|
||
extern int (*deprecated_query_hook) (const char *, va_list)
|
||
ATTRIBUTE_FPTR_PRINTF(1,0);
|
||
extern void (*deprecated_warning_hook) (const char *, va_list)
|
||
ATTRIBUTE_FPTR_PRINTF(1,0);
|
||
extern void (*deprecated_readline_begin_hook) (const char *, ...)
|
||
ATTRIBUTE_FPTR_PRINTF_1;
|
||
extern char *(*deprecated_readline_hook) (const char *);
|
||
extern void (*deprecated_readline_end_hook) (void);
|
||
extern void (*deprecated_context_hook) (int);
|
||
extern ptid_t (*deprecated_target_wait_hook) (ptid_t ptid,
|
||
struct target_waitstatus *status,
|
||
int options);
|
||
|
||
extern void (*deprecated_attach_hook) (void);
|
||
extern void (*deprecated_detach_hook) (void);
|
||
extern void (*deprecated_call_command_hook) (struct cmd_list_element * c,
|
||
const char *cmd, int from_tty);
|
||
|
||
extern int (*deprecated_ui_load_progress_hook) (const char *section,
|
||
unsigned long num);
|
||
|
||
/* If this definition isn't overridden by the header files, assume
|
||
that isatty and fileno exist on this system. */
|
||
#ifndef ISATTY
|
||
#define ISATTY(FP) (isatty (fileno (FP)))
|
||
#endif
|
||
|
||
/* * A width that can achieve a better legibility for GDB MI mode. */
|
||
#define GDB_MI_MSG_WIDTH 80
|
||
|
||
/* From progspace.c */
|
||
|
||
extern void initialize_progspace (void);
|
||
extern void initialize_inferiors (void);
|
||
|
||
/* * Special block numbers */
|
||
|
||
enum block_enum
|
||
{
|
||
GLOBAL_BLOCK = 0,
|
||
STATIC_BLOCK = 1,
|
||
FIRST_LOCAL_BLOCK = 2
|
||
};
|
||
|
||
/* User selection used in observable.h and multiple print functions. */
|
||
|
||
enum user_selected_what_flag
|
||
{
|
||
/* Inferior selected. */
|
||
USER_SELECTED_INFERIOR = 1 << 1,
|
||
|
||
/* Thread selected. */
|
||
USER_SELECTED_THREAD = 1 << 2,
|
||
|
||
/* Frame selected. */
|
||
USER_SELECTED_FRAME = 1 << 3
|
||
};
|
||
DEF_ENUM_FLAGS_TYPE (enum user_selected_what_flag, user_selected_what);
|
||
|
||
#include "utils.h"
|
||
|
||
#endif /* #ifndef DEFS_H */
|