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Diffstat (limited to 'newlib/libc/sys/linux/libc-symbols.h')
| -rw-r--r-- | newlib/libc/sys/linux/libc-symbols.h | 379 |
1 files changed, 0 insertions, 379 deletions
diff --git a/newlib/libc/sys/linux/libc-symbols.h b/newlib/libc/sys/linux/libc-symbols.h deleted file mode 100644 index f32260c95..000000000 --- a/newlib/libc/sys/linux/libc-symbols.h +++ /dev/null @@ -1,379 +0,0 @@ -/* Support macros for making weak and strong aliases for symbols, - and for using symbol sets and linker warnings with GNU ld. - Copyright (C) 1995,1996,1997,1998,2000,2001 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#ifndef _LIBC_SYMBOLS_H -#define _LIBC_SYMBOLS_H 1 - -/* This file's macros are included implicitly in the compilation of every - file in the C library by -imacros. - - We include config.h which is generated by configure. - It should define for us the following symbols: - - * HAVE_ASM_SET_DIRECTIVE if we have `.set B, A' instead of `A = B'. - * ASM_GLOBAL_DIRECTIVE with `.globl' or `.global'. - * HAVE_GNU_LD if using GNU ld, with support for weak symbols in a.out, - and for symbol set and warning messages extensions in a.out and ELF. - * HAVE_ELF if using ELF, which supports weak symbols using `.weak'. - * HAVE_ASM_WEAK_DIRECTIVE if we have weak symbols using `.weak'. - * HAVE_ASM_WEAKEXT_DIRECTIVE if we have weak symbols using `.weakext'. - - */ - -/* This is defined for the compilation of all C library code. features.h - tests this to avoid inclusion of stubs.h while compiling the library, - before stubs.h has been generated. Some library code that is shared - with other packages also tests this symbol to see if it is being - compiled as part of the C library. We must define this before including - config.h, because it makes some definitions conditional on whether libc - itself is being compiled, or just some generator program. */ -#define _LIBC 1 - -/* Enable declarations of GNU extensions, since we are compiling them. */ -#define _GNU_SOURCE 1 -/* And we also need the data for the reentrant functions. */ -#define _REENTRANT 1 - -#include <config.h> - -/* The symbols in all the user (non-_) macros are C symbols. - HAVE_GNU_LD without HAVE_ELF implies a.out. */ - -#if defined HAVE_ASM_WEAK_DIRECTIVE || defined HAVE_ASM_WEAKEXT_DIRECTIVE -# define HAVE_WEAK_SYMBOLS -#endif - -#ifndef __SYMBOL_PREFIX -# ifdef NO_UNDERSCORES -# define __SYMBOL_PREFIX -# else -# define __SYMBOL_PREFIX "_" -# endif -#endif - -#ifndef C_SYMBOL_NAME -# ifdef NO_UNDERSCORES -# define C_SYMBOL_NAME(name) name -# else -# define C_SYMBOL_NAME(name) _##name -# endif -#endif - -#ifndef ASM_LINE_SEP -# define ASM_LINE_SEP ; -#endif - -#ifndef C_SYMBOL_DOT_NAME -# define C_SYMBOL_DOT_NAME(name) .##name -#endif - -#ifndef __ASSEMBLER__ -/* GCC understands weak symbols and aliases; use its interface where - possible, instead of embedded assembly language. */ - -/* Define ALIASNAME as a strong alias for NAME. */ -# define strong_alias(name, aliasname) _strong_alias(name, aliasname) -# define _strong_alias(name, aliasname) \ - extern __typeof (name) aliasname __attribute__ ((alias (#name))); - -/* This comes between the return type and function name in - a function definition to make that definition weak. */ -# define weak_function __attribute__ ((weak)) -# define weak_const_function __attribute__ ((weak, __const__)) - -# ifdef HAVE_WEAK_SYMBOLS - -/* Define ALIASNAME as a weak alias for NAME. - If weak aliases are not available, this defines a strong alias. */ -# define weak_alias(name, aliasname) _weak_alias (name, aliasname) -# define _weak_alias(name, aliasname) \ - extern __typeof (name) aliasname __attribute__ ((weak, alias (#name))); - -/* Declare SYMBOL as weak undefined symbol (resolved to 0 if not defined). */ -# define weak_extern(symbol) _weak_extern (symbol) -# ifdef HAVE_ASM_WEAKEXT_DIRECTIVE -# define _weak_extern(symbol) asm (".weakext " __SYMBOL_PREFIX #symbol); -# else -# define _weak_extern(symbol) asm (".weak " __SYMBOL_PREFIX #symbol); -# endif - -# else - -# define weak_alias(name, aliasname) strong_alias(name, aliasname) -# define weak_extern(symbol) /* Nothing. */ - -# endif - -#else /* __ASSEMBLER__ */ - -# ifdef HAVE_ASM_SET_DIRECTIVE -# define strong_alias(original, alias) \ - ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME (alias) ASM_LINE_SEP \ - .set C_SYMBOL_NAME (alias),C_SYMBOL_NAME (original) -# else -# ifdef HAVE_ASM_GLOBAL_DOT_NAME -# define strong_alias(original, alias) \ - ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME (alias) ASM_LINE_SEP \ - C_SYMBOL_NAME (alias) = C_SYMBOL_NAME (original) ASM_LINE_SEP \ - ASM_GLOBAL_DIRECTIVE C_SYMBOL_DOT_NAME (alias) ASM_LINE_SEP \ - C_SYMBOL_DOT_NAME (alias) = C_SYMBOL_DOT_NAME (original) -# else -# define strong_alias(original, alias) \ - ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME (alias) ASM_LINE_SEP \ - C_SYMBOL_NAME (alias) = C_SYMBOL_NAME (original) -# endif -# endif - -# ifdef HAVE_WEAK_SYMBOLS -# ifdef HAVE_ASM_WEAKEXT_DIRECTIVE -# define weak_alias(original, alias) \ - .weakext C_SYMBOL_NAME (alias), C_SYMBOL_NAME (original) -# define weak_extern(symbol) \ - .weakext C_SYMBOL_NAME (symbol) - -# else /* ! HAVE_ASM_WEAKEXT_DIRECTIVE */ - -# ifdef HAVE_ASM_GLOBAL_DOT_NAME -# define weak_alias(original, alias) \ - .weak C_SYMBOL_NAME (alias) ASM_LINE_SEP \ - C_SYMBOL_NAME (alias) = C_SYMBOL_NAME (original) ASM_LINE_SEP \ - ASM_GLOBAL_DIRECTIVE C_SYMBOL_DOT_NAME (alias) ASM_LINE_SEP \ - C_SYMBOL_DOT_NAME (alias) = C_SYMBOL_DOT_NAME (original) -# else -# define weak_alias(original, alias) \ - .weak C_SYMBOL_NAME (alias) ASM_LINE_SEP \ - C_SYMBOL_NAME (alias) = C_SYMBOL_NAME (original) -# endif - -# define weak_extern(symbol) \ - .weak C_SYMBOL_NAME (symbol) - -# endif /* ! HAVE_ASM_WEAKEXT_DIRECTIVE */ - -# else /* ! HAVE_WEAK_SYMBOLS */ - -# define weak_alias(original, alias) strong_alias(original, alias) -# define weak_extern(symbol) /* Nothing */ -# endif /* ! HAVE_WEAK_SYMBOLS */ - -#endif /* __ASSEMBLER__ */ - -/* On some platforms we can make internal function calls (i.e., calls of - functions not exported) a bit faster by using a different calling - convention. */ -#ifndef internal_function -# define internal_function /* empty */ -#endif - -/* Prepare for the case that `__builtin_expect' is not available. */ -#ifndef HAVE_BUILTIN_EXPECT -# define __builtin_expect(expr, val) (expr) -#endif - -/* Determine the return address. */ -#define RETURN_ADDRESS(nr) \ - __builtin_extract_return_addr (__builtin_return_address (nr)) - -/* When a reference to SYMBOL is encountered, the linker will emit a - warning message MSG. */ -#ifdef HAVE_GNU_LD -# ifdef HAVE_ELF - -/* We want the .gnu.warning.SYMBOL section to be unallocated. */ -# ifdef HAVE_ASM_PREVIOUS_DIRECTIVE -# define __make_section_unallocated(section_string) \ - asm (".section " section_string "\n\t.previous"); -# elif defined HAVE_ASM_POPSECTION_DIRECTIVE -# define __make_section_unallocated(section_string) \ - asm (".pushsection " section_string "\n\t.popsection"); -# else -# define __make_section_unallocated(section_string) -# endif - -/* Tacking on "\n\t#" to the section name makes gcc put it's bogus - section attributes on what looks like a comment to the assembler. */ -# ifdef HAVE_SECTION_QUOTES -# define link_warning(symbol, msg) \ - __make_section_unallocated (".gnu.warning." #symbol) \ - static const char __evoke_link_warning_##symbol[] \ - __attribute__ ((section (".gnu.warning." #symbol "\"\n\t#\""))) = msg; -# else -# define link_warning(symbol, msg) \ - __make_section_unallocated (".gnu.warning." #symbol) \ - static const char __evoke_link_warning_##symbol[] \ - __attribute__ ((section (".gnu.warning." #symbol "\n\t#"))) = msg; -# endif -# else /* Not ELF: a.out */ -# ifdef HAVE_XCOFF -/* XCOFF does not support .stabs. - The native aix linker will remove the .stab and .stabstr sections - The gnu linker will have a fatal error if there is a relocation for - symbol in the .stab section. Silently disable this macro. */ -# define link_warning(symbol, msg) -# else -# define link_warning(symbol, msg) \ - asm (".stabs \"" msg "\",30,0,0,0\n\t" \ - ".stabs \"" __SYMBOL_PREFIX #symbol "\",1,0,0,0\n"); -# endif /* XCOFF */ -# endif -#else -/* We will never be heard; they will all die horribly. */ -# define link_warning(symbol, msg) -#endif - -/* A canned warning for sysdeps/stub functions. */ -#define stub_warning(name) \ - link_warning (name, \ - "warning: " #name " is not implemented and will always fail") - -/* - -*/ - -#ifdef HAVE_GNU_LD - -/* Symbol set support macros. */ - -# ifdef HAVE_ELF - -/* Make SYMBOL, which is in the text segment, an element of SET. */ -# define text_set_element(set, symbol) _elf_set_element(set, symbol) -/* Make SYMBOL, which is in the data segment, an element of SET. */ -# define data_set_element(set, symbol) _elf_set_element(set, symbol) -/* Make SYMBOL, which is in the bss segment, an element of SET. */ -# define bss_set_element(set, symbol) _elf_set_element(set, symbol) - -/* These are all done the same way in ELF. - There is a new section created for each set. */ -# ifdef SHARED -/* When building a shared library, make the set section writable, - because it will need to be relocated at run time anyway. */ -# define _elf_set_element(set, symbol) \ - static const void *__elf_set_##set##_element_##symbol##__ \ - __attribute__ ((unused, section (#set))) = &(symbol) -# else -# define _elf_set_element(set, symbol) \ - static const void *const __elf_set_##set##_element_##symbol##__ \ - __attribute__ ((unused, section (#set))) = &(symbol) -# endif - -/* Define SET as a symbol set. This may be required (it is in a.out) to - be able to use the set's contents. */ -# define symbol_set_define(set) symbol_set_declare(set) - -/* Declare SET for use in this module, if defined in another module. */ -# define symbol_set_declare(set) \ - extern void *const __start_##set __attribute__ ((__weak__)); \ - extern void *const __stop_##set __attribute__ ((__weak__)); \ - weak_extern (__start_##set) weak_extern (__stop_##set) - -/* Return a pointer (void *const *) to the first element of SET. */ -# define symbol_set_first_element(set) (&__start_##set) - -/* Return true iff PTR (a void *const *) has been incremented - past the last element in SET. */ -# define symbol_set_end_p(set, ptr) ((ptr) >= &__stop_##set) - -# else /* Not ELF: a.out. */ - -# ifdef HAVE_XCOFF -/* XCOFF does not support .stabs. - The native aix linker will remove the .stab and .stabstr sections - The gnu linker will have a fatal error if there is a relocation for - symbol in the .stab section. Silently disable these macros. */ -# define text_set_element(set, symbol) -# define data_set_element(set, symbol) -# define bss_set_element(set, symbol) -# else -# define text_set_element(set, symbol) \ - asm (".stabs \"" __SYMBOL_PREFIX #set "\",23,0,0," __SYMBOL_PREFIX #symbol) -# define data_set_element(set, symbol) \ - asm (".stabs \"" __SYMBOL_PREFIX #set "\",25,0,0," __SYMBOL_PREFIX #symbol) -# define bss_set_element(set, symbol) ?error Must use initialized data. -# endif /* XCOFF */ -# define symbol_set_define(set) void *const (set)[1]; -# define symbol_set_declare(set) extern void *const (set)[1]; - -# define symbol_set_first_element(set) &(set)[1] -# define symbol_set_end_p(set, ptr) (*(ptr) == 0) - -# endif /* ELF. */ -#else -/* We cannot do anything in generial. */ -# define text_set_element(set, symbol) asm ("") -# define data_set_element(set, symbol) asm ("") -# define bss_set_element(set, symbol) asm ("") -# define symbol_set_define(set) void *const (set)[1]; -# define symbol_set_declare(set) extern void *const (set)[1]; - -# define symbol_set_first_element(set) &(set)[1] -# define symbol_set_end_p(set, ptr) (*(ptr) == 0) -#endif /* Have GNU ld. */ - -#if DO_VERSIONING -# define symbol_version(real, name, version) \ - _symbol_version(real, name, version) -# define default_symbol_version(real, name, version) \ - _default_symbol_version(real, name, version) -# ifdef __ASSEMBLER__ -# define _symbol_version(real, name, version) \ - .symver real, name##@##version -# define _default_symbol_version(real, name, version) \ - .symver real, name##@##@##version -# else -# define _symbol_version(real, name, version) \ - __asm__ (".symver " #real "," #name "@" #version) -# define _default_symbol_version(real, name, version) \ - __asm__ (".symver " #real "," #name "@@" #version) -# endif -#else -# define symbol_version(real, name, version) -# define default_symbol_version(real, name, version) \ - strong_alias(real, name) -#endif - -#define libc_hidden_def(x) -#define libc_hidden_weak(x) -#define libc_hidden_proto(x) -#define libc_hidden_data_def(x) -#define libresolv_hidden_def(x) -#define libresolv_hidden_weak(x) -#define libresolv_hidden_data_def(x) -#define libresolv_hidden_proto(x) -#define static_link_warning(x) -#define libc_freeres_ptr(x) x -#define DL_CALL_FCT(x,y) x y -#define attribute_hidden -#define internal_function - -/* Move compatibility symbols out of the way by placing them all in a - special section. */ -#ifndef __ASSEMBLER__ -# define attribute_compat_text_section \ - __attribute__ ((section (".text.compat"))) -# define attribute_compat_data_section \ - __attribute__ ((section (".data.compat"))) -#else -# define compat_text_section .section ".text.compat", "ax"; -# define compat_data_section .section ".data.compat", "aw"; -#endif - - -#endif /* libc-symbols.h */ |