// gold.h -- general definitions for gold -*- C++ -*-
-// Copyright 2006, 2007 Free Software Foundation, Inc.
+// Copyright (C) 2006-2020 Free Software Foundation, Inc.
// Written by Ian Lance Taylor <iant@google.com>.
// This file is part of gold.
#include "config.h"
#include "ansidecl.h"
-#ifdef ENABLE_NLS
-# include <libintl.h>
-# define _(String) gettext (String)
-# ifdef gettext_noop
-# define N_(String) gettext_noop (String)
-# else
-# define N_(String) (String)
-# endif
-#else
-# define gettext(Msgid) (Msgid)
-# define dgettext(Domainname, Msgid) (Msgid)
-# define dcgettext(Domainname, Msgid, Category) (Msgid)
-# define textdomain(Domainname) while (0) /* nothing */
-# define bindtextdomain(Domainname, Dirname) while (0) /* nothing */
-# define _(String) (String)
-# define N_(String) (String)
-#endif
-
-// Figure out how to get a hash set and a hash map.
-
-#if defined(HAVE_TR1_UNORDERED_SET) && defined(HAVE_TR1_UNORDERED_MAP)
-
-#include <tr1/unordered_set>
-#include <tr1/unordered_map>
-
-// We need a template typedef here.
-
-#define Unordered_set std::tr1::unordered_set
-#define Unordered_map std::tr1::unordered_map
-
-#elif defined(HAVE_EXT_HASH_MAP) && defined(HAVE_EXT_HASH_SET)
-
-#include <ext/hash_map>
-#include <ext/hash_set>
-#include <string>
-
-#define Unordered_set __gnu_cxx::hash_set
-#define Unordered_map __gnu_cxx::hash_map
+#include <cstddef>
+#include <cstdlib>
+#include <cstring>
+#include <stdint.h>
+#include <sys/types.h>
-namespace __gnu_cxx
-{
-
-template<>
-struct hash<std::string>
-{
- size_t
- operator()(std::string s) const
- { return __stl_hash_string(s.c_str()); }
-};
-
-template<typename T>
-struct hash<T*>
-{
- size_t
- operator()(T* p) const
- { return reinterpret_cast<size_t>(p); }
-};
-
-}
-
-#else
-
-// The fallback is to just use set and map.
-
-#include <set>
-#include <map>
-
-#define Unordered_set std::set
-#define Unordered_map std::map
-
-#endif
-
-#ifndef HAVE_PREAD
-extern "C" ssize_t pread(int, void*, size_t, off_t);
-#endif
+#include "system.h"
namespace gold
{
-// This is a hack to work around a problem with older versions of g++.
-// The problem is that they don't support calling a member template by
-// specifying the template parameters. It works to pass in an
-// argument for argument dependent lookup.
-
-// To use this, the member template method declaration should put
-// ACCEPT_SIZE or ACCEPT_SIZE_ENDIAN after the last parameter. If the
-// method takes no parameters, use ACCEPT_SIZE_ONLY or
-// ACCEPT_SIZE_ENDIAN_ONLY.
-
-// When calling the method, instead of using fn<size>, use fn
-// SELECT_SIZE_NAME or SELECT_SIZE_ENDIAN_NAME. And after the last
-// argument, put SELECT_SIZE(size) or SELECT_SIZE_ENDIAN(size,
-// big_endian). If there is only one argment, use the _ONLY variants.
-
-#ifdef HAVE_MEMBER_TEMPLATE_SPECIFICATIONS
-
-#define SELECT_SIZE_NAME(size) <size>
-#define SELECT_SIZE(size)
-#define SELECT_SIZE_ONLY(size)
-#define ACCEPT_SIZE
-#define ACCEPT_SIZE_ONLY
-#define ACCEPT_SIZE_EXPLICIT(size)
-
-#define SELECT_SIZE_ENDIAN_NAME(size, big_endian) <size, big_endian>
-#define SELECT_SIZE_ENDIAN(size, big_endian)
-#define SELECT_SIZE_ENDIAN_ONLY(size, big_endian)
-#define ACCEPT_SIZE_ENDIAN
-#define ACCEPT_SIZE_ENDIAN_ONLY
-#define ACCEPT_SIZE_ENDIAN_EXPLICIT(size, big_endian)
-
-#else // !defined(HAVE_MEMBER_TEMPLATE_SPECIFICATIONS)
-
-template<int size>
-class Select_size { };
-template<int size, bool big_endian>
-class Select_size_endian { };
-
-#define SELECT_SIZE_NAME(size)
-#define SELECT_SIZE(size) , Select_size<size>()
-#define SELECT_SIZE_ONLY(size) Select_size<size>()
-#define ACCEPT_SIZE , Select_size<size>
-#define ACCEPT_SIZE_ONLY Select_size<size>
-#define ACCEPT_SIZE_EXPLICIT(size) , Select_size<size>
-
-#define SELECT_SIZE_ENDIAN_NAME(size, big_endian)
-#define SELECT_SIZE_ENDIAN(size, big_endian) \
- , Select_size_endian<size, big_endian>()
-#define SELECT_SIZE_ENDIAN_ONLY(size, big_endian) \
- Select_size_endian<size, big_endian>()
-#define ACCEPT_SIZE_ENDIAN , Select_size_endian<size, big_endian>
-#define ACCEPT_SIZE_ENDIAN_ONLY Select_size_endian<size, big_endian>
-#define ACCEPT_SIZE_ENDIAN_EXPLICIT(size, big_endian) \
- , Select_size_endian<size, big_endian>
-
-#endif // !defined(HAVE_MEMBER_TEMPLATE_SPECIFICATIONS)
-} // End namespace gold.
-
-namespace gold
-{
+// General declarations.
class General_options;
class Command_line;
-class Input_argument_list;
class Dirsearch;
class Input_objects;
+class Mapfile;
class Symbol;
class Symbol_table;
class Layout;
template<int size, bool big_endian>
struct Relocate_info;
+// Exit status codes.
+
+enum Exit_status
+{
+ GOLD_OK = EXIT_SUCCESS,
+ GOLD_ERR = EXIT_FAILURE,
+ GOLD_FALLBACK = EXIT_FAILURE + 1
+};
+
+// Some basic types. For these we use lower case initial letters.
+
+// For an offset in an input or output file, use off_t. Note that
+// this will often be a 64-bit type even for a 32-bit build.
+
+// The size of a section if we are going to look at the contents.
+typedef size_t section_size_type;
+
+// An offset within a section when we are looking at the contents.
+typedef ptrdiff_t section_offset_type;
+
// The name of the program as used in error messages.
extern const char* program_name;
// This function is called to exit the program. Status is true to
// exit success (0) and false to exit failure (1).
extern void
-gold_exit(bool status) ATTRIBUTE_NORETURN;
+gold_exit(Exit_status status) ATTRIBUTE_NORETURN;
// This function is called to emit an error message and then
// immediately exit with failure.
extern void
gold_warning(const char* msg, ...) ATTRIBUTE_PRINTF_1;
+// This function is called to print an informational message.
+extern void
+gold_info(const char* msg, ...) ATTRIBUTE_PRINTF_1;
+
+// This function is called to emit an error message and then
+// immediately exit with fallback status (e.g., when
+// --incremental-update fails and the link needs to be restarted
+// with --incremental-full).
+extern void
+gold_fallback(const char* format, ...) ATTRIBUTE_NORETURN ATTRIBUTE_PRINTF_1;
+
+// Work around a bug in gcc 4.3.0. http://gcc.gnu.org/PR35546 . This
+// can probably be removed after the bug has been fixed for a while.
+#ifdef HAVE_TEMPLATE_ATTRIBUTES
+#define TEMPLATE_ATTRIBUTE_PRINTF_4 ATTRIBUTE_PRINTF_4
+#else
+#define TEMPLATE_ATTRIBUTE_PRINTF_4
+#endif
+
// This function is called to issue an error at the location of a
// reloc.
template<int size, bool big_endian>
extern void
gold_error_at_location(const Relocate_info<size, big_endian>*,
size_t, off_t, const char* format, ...)
- ATTRIBUTE_PRINTF_4;
+ TEMPLATE_ATTRIBUTE_PRINTF_4;
// This function is called to issue a warning at the location of a
// reloc.
extern void
gold_warning_at_location(const Relocate_info<size, big_endian>*,
size_t, off_t, const char* format, ...)
- ATTRIBUTE_PRINTF_4;
+ TEMPLATE_ATTRIBUTE_PRINTF_4;
-// This function is called to report an undefined symbol.
+// This function is called to report an undefined symbol without
+// a relocation (e.g., referenced by a dynamic object). SYM is
+// the undefined symbol. The file name associated with the SYM
+// is used to print a location for the undefined symbol.
+extern void
+gold_undefined_symbol(const Symbol*);
+
+// This function is called to report an undefined symbol resulting
+// from a relocation. SYM is the undefined symbol. RELINFO is the
+// general relocation info. RELNUM is the number of the reloc,
+// and RELOFFSET is the reloc's offset.
template<int size, bool big_endian>
extern void
-gold_undefined_symbol(const Symbol*,
- const Relocate_info<size, big_endian>*,
- size_t, off_t);
+gold_undefined_symbol_at_location(const Symbol*,
+ const Relocate_info<size, big_endian>*,
+ size_t, off_t);
// This is function is called in some cases if we run out of memory.
extern void
gold_nomem() ATTRIBUTE_NORETURN;
+// In versions of gcc before 4.3, using __FUNCTION__ in a template
+// function can cause gcc to get confused about whether or not the
+// function can return. See http://gcc.gnu.org/PR30988. Use a macro
+// to avoid the problem. This can be removed when we no longer need
+// to care about gcc versions before 4.3.
+#if defined(__GNUC__) && GCC_VERSION < 4003
+#define FUNCTION_NAME static_cast<const char*>(__FUNCTION__)
+#else
+#define FUNCTION_NAME __FUNCTION__
+#endif
+
// This macro and function are used in cases which can not arise if
// the code is written correctly.
#define gold_unreachable() \
- (gold::do_gold_unreachable(__FILE__, __LINE__, __FUNCTION__))
+ (gold::do_gold_unreachable(__FILE__, __LINE__, FUNCTION_NAME))
extern void do_gold_unreachable(const char*, int, const char*)
ATTRIBUTE_NORETURN;
extern const char*
get_version_string();
+// Convert numeric types without unnoticed loss of precision.
+template<typename To, typename From>
+inline To
+convert_types(const From from)
+{
+ To to = from;
+ gold_assert(static_cast<From>(to) == from);
+ return to;
+}
+
+// A common case of convert_types<>: convert to section_size_type.
+template<typename From>
+inline section_size_type
+convert_to_section_size_type(const From from)
+{ return convert_types<section_size_type, From>(from); }
+
// Queue up the first set of tasks.
extern void
queue_initial_tasks(const General_options&,
Workqueue*,
Input_objects*,
Symbol_table*,
- Layout*);
+ Layout*,
+ Mapfile*);
+
+// Queue up the set of tasks to be done before
+// the middle set of tasks. Only used when garbage
+// collection is to be done.
+extern void
+queue_middle_gc_tasks(const General_options&,
+ const Task*,
+ const Input_objects*,
+ Symbol_table*,
+ Layout*,
+ Workqueue*,
+ Mapfile*);
// Queue up the middle set of tasks.
extern void
const Input_objects*,
Symbol_table*,
Layout*,
- Workqueue*);
+ Workqueue*,
+ Mapfile*);
// Queue up the final set of tasks.
extern void
Workqueue*,
Output_file* of);
+inline bool
+is_prefix_of(const char* prefix, const char* str)
+{
+ return strncmp(prefix, str, strlen(prefix)) == 0;
+}
+
+const char* const cident_section_start_prefix = "__start_";
+const char* const cident_section_stop_prefix = "__stop_";
+
+// Returns true if the name is a valid C identifier
+inline bool
+is_cident(const char* name)
+{
+ return (name[strspn(name,
+ ("0123456789"
+ "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+ "abcdefghijklmnopqrstuvwxyz"
+ "_"))]
+ == '\0');
+}
+
+// We sometimes need to hash strings. Ideally we should use std::tr1::hash or
+// __gnu_cxx::hash on some systems but there is no guarantee that either
+// one is available. For portability, we define simple string hash functions.
+
+template<typename Char_type>
+inline size_t
+string_hash(const Char_type* s, size_t length)
+{
+ // This is the hash function used by the dynamic linker for
+ // DT_GNU_HASH entries. I compared this to a Fowler/Noll/Vo hash
+ // for a C++ program with 385,775 global symbols. This hash
+ // function was very slightly worse. However, it is much faster to
+ // compute. Overall wall clock time was a win.
+ const unsigned char* p = reinterpret_cast<const unsigned char*>(s);
+ size_t h = 5381;
+ for (size_t i = 0; i < length * sizeof(Char_type); ++i)
+ h = h * 33 + *p++;
+ return h;
+}
+
+// Same as above except we expect the string to be zero terminated.
+
+template<typename Char_type>
+inline size_t
+string_hash(const Char_type* s)
+{
+ const unsigned char* p = reinterpret_cast<const unsigned char*>(s);
+ size_t h = 5381;
+ for (size_t i = 0; s[i] != 0; ++i)
+ {
+ for (size_t j = 0; j < sizeof(Char_type); j++)
+ h = h * 33 + *p++;
+ }
+
+ return h;
+}
+
+// Return whether STRING contains a wildcard character. This is used
+// to speed up matching.
+
+inline bool
+is_wildcard_string(const char* s)
+{
+ return strpbrk(s, "?*[") != NULL;
+}
+
} // End namespace gold.
#endif // !defined(GOLD_GOLD_H)
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