glibc/include/libc-symbols.h
Ulrich Drepper da2d1bc5ad Update.
1998-02-10 23:57  Ulrich Drepper  <drepper@happy.cygnus.com>

	* misc/tst-efgcvt.c: Add more tests.
	* misc/efgcvt_r.c: Correct result for above new tests.

1998-02-06 17:22  H.J. Lu  <hjl@gnu.org>

	* misc/efgcvt_r.c (fcvt_r, ecvt_r): Correctly handle
	NDIGIT <= 0.

1998-02-10 16:48  Philip Blundell  <pb@nexus.co.uk>

	* Makerules (install-no-libc.a-nosubdir): Don't install-bin (etc)
	if the programs weren't built.

1998-02-09 10:12  Philip Blundell  <pb@nexus.co.uk>

	* sysdeps/libm-ieee754/s_exp2.c (__ieee754_exp2): If we don't have
	FE_TONEAREST, soldier on regardless and do the best we can.
	* sysdeps/libm-ieee754/s_exp2f.c (__ieee754_exp2f): likewise.

1998-02-5 17:20  Philip Blundell  <pb@nexus.co.uk>

	* sysdeps/standalone/filedesc.h: Define __need_FOPEN_MAX, not
	_STDIO_H, before including <bits/stdio_lim.h>.

	* sysdeps/standalone/arm/bits/errno.h (EOVERFLOW): Added.

	* io/fts.c (fts_build): Don't try to use d_type if it doesn't
	exist.
	
	* sysdeps/arm/sys/ucontext.h: New file.

1998-02-04 10:11  Philip Blundell  <pb@nexus.co.uk>

	* manual/stdio.texi (Formatted Output Functions): Explicitly say
	that the return value from snprintf() does not count the
	terminating NUL as a character.
	
1998-02-10 16:57  Ulrich Drepper  <drepper@happy.cygnus.com>

	* manual/users.texi: Rewrite to describe correct POSIX behaviour,
	add description for sete[ug]id and general cleanup.
	Patch by Zack Weinberg <zack@rabi.phys.columbia.edu>.

1998-01-04  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* Makefile (parent-clean): Don't remove makefile fragments here.
	(postclean): New variable.
	(clean): Remove makefile fragments here.
	(realclean distclean): Likewise.  Pass sysdep-subdirs to sub-make.
	(generated): Add isomac and isomanc.out.
	* Makeconfig ($(common-objpfx)soversions.mk): Don't generate if
	avoid-generated is set.
	(postclean-generated): Add soversion.mk.
	($(common-objpfx)version.mk): Don't include if avoid-generated is
	set.
	* Makerules: Still need to include $(+sysdir_pfx)sysd-Makefile if
	avoid-generated is set.
	(common-generated): Add libc.so and libc.so$(libc.so-version).
	(generated): Add versioned libraries.
	(common-mostlyclean): Also remove %.so and %_pic.a.
	* csu/Makefile (generated): Add abi-tag.h.
	* db2/Makefile (extra-objs): Add getlong.o.
	* elf/Makefile (generated): Add ld.so, ldd and
	$(rtld-installed-name).
	(others): Add ldconfig here instead of ldconfig.o to extra-objs.
	* malloc/Makefile (generated): Add mtrace.
	* po/Makefile: Don't include version.mk, not needed any more.
	* sunrpc/Makefile (generated): Add rpc-proto.d and rpcgen.
	* sysdeps/unix/Makefile: Fix local_lim.h -> bits/local_lim.h,
	syscall.h -> sys/syscall.h.
	(common-generated): Add s-proto.d.
	(postclean-generated): Add sysd-syscalls.
	* localedata/Makefile (test-output): Add all output files.
	(generated): Add test-input and test-output.
	(generated-dirs): Add all the dirs.

1998-01-04  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* Makefile (test-output, generated, generated-dirs): New
	variables.

1998-02-10 16:57  Ulrich Drepper  <drepper@happy.cygnus.com>

	* resolv/nss_dns/dns-host.c: Various code cleanups.
	
1998-02-09 08:10  H.J. Lu  <hjl@gnu.org>

	* resolv/gethnamaddr.c (getanswer): Fix the PTR/CNAME bug.
	From Philip Blundell <pb@nexus.co.uk>.
	* resolv/nss_dns/dns-host.c (getanswer_r): Ditto.

1998-02-08  Andreas Jaeger  <aj@arthur.rhein-neckar.de>

	* libc.map: Add .rem, .div, .mul, .udiv, .umul, .urem for Sparc.
	Suggested by debian/sparc porters.

1998-02-07  Andreas Jaeger  <aj@arthur.rhein-neckar.de>

	* misc/tst-efgcvt.c: Totally rewritten, added a lot of new tests
	for ecvt and fcvt.

1998-02-10 16:32  Ulrich Drepper  <drepper@happy.cygnus.com>

	* sysdeps/unix/sysv/linux/ptsname.c (__ptsname_r): Use __xstat and
	__fxstat instead of stat and fstat.  Use namespace clean __stpcpy.

	* signal/signal.h: Always define sigset_t if __need_sigset_t is
	defined even if __USE_POSIX is not defined.

1998-02-02 20:51  Zack Weinberg  <zack@rabi.phys.columbia.edu>

	* sysdeps/unix/sysv/linux/ptsname.c (__ptsname_r): Correct last patch
	to support obsolete tty major numbers correctly.
	
1998-02-02 08:47  H.J. Lu  <hjl@gnu.org>

	* login/Makefile ($(inst_libexecdir)/pt_chown): Make the target
	directory first and ignore install error.

	* sysdeps/unix/sysv/linux/ptsname.c (__ptsname_r): Substract
	128 from ptyno and fix a typo for the BSD style pty.

1998-02-01  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* sysdeps/unix/Makefile ($(common-objpfx)s-proto.d): Depend on all
	syscalls.list's.

1998-02-01  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* sysdeps/unix/sysv/linux/Makefile (sysdep_routines): Add
	getresuid and getresgid.

	* sysdeps/unix/sysv/linux/getresuid.c: New file.
	* sysdeps/unix/sysv/linux/getresgid.c: New file.

	* sysdeps/unix/sysv/linux/syscalls.list: Remove getres[ug]id, add
	s_getres[ug]id.

	* sysdeps/unix/sysv/linux/alpha/syscalls.list: Add getres[ug]id.
	* sysdeps/unix/sysv/linux/sparc/sparc64/syscalls.list: Likewise.
	* sysdeps/unix/sysv/linux/mips/syscalls.list: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/syscalls.list: Likewise.

1998-02-02 08:11  H.J. Lu  <hjl@gnu.org>

	* nscd/grpcache.c: Include <stdlib.h>.

1998-02-01 16:01  H.J. Lu  <hjl@gnu.org>

	* stdlib/atoll.c: Fix comments.

	* sysdeps/posix/ttyname.c: Ignore stdin/stdout/stderr.
	* sysdeps/posix/ttyname_r.c: Ditto.

1998-02-03  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* io/sys/stat.h: Define S_IFLNK and S_IFSOCK if __USE_BSD or
	__USE_MISC, independent of __USE_UNIX98.

1998-02-10 19:18  Ulrich Drepper  <drepper@happy.cygnus.com>

	* sysdeps/unix/sysv/linux/i386/sigaction.c (__libc_missing_rt_sigs):
	Rename from __libc_have_rt_sigs and leave as COMMON data.
	
1998-02-04 11:58  Richard Henderson  <rth@twiddle.rth.home>

	* Makeconfig (CFLAGS-.os): Kill -fno-common.
	* Makerules (libc.so): Prelink libc_pic.a, allocating commons.

	* libc.map (GLIBC_2.1): Add Linux/Alpha tv64 symbols.
	* elf/rtld.map: New file.  Needed to define the GLIBC_2.* 
	version symbols.
	* include/libc-symbols.h (symbol_version, default_symbol_version):
	Provide asm versions and correct !DO_VERSIONING versions.
	* sysdeps/unix/make-syscalls.sh: Recognize version symbols in
	the weak symbol list.
	
	* sysdeps/unix/sysv/linux/sigaction.c (__libc_missing_rt_sigs):
	Rename from __libc_have_rt_sigs and leave as COMMON data.
	* sysdeps/unix/sysv/linux/sigpending.c: Likewise.
	* sysdeps/unix/sysv/linux/sigprocmask.c: Likewise.
	* sysdeps/unix/sysv/linux/sigsuspend.c: Likewise.

1998-02-04 16:41  Zack Weinberg  <zack@rabi.phys.columbia.edu>

	* sunrpc/Makefile: Correct dependencies of rpcgen.

1998-02-10 03:00  Ulrich Drepper  <drepper@happy.cygnus.com>

	* nscd/Makefile: Fix test for available linuxthreads add-on.
	Patch by Zack Weinberg <zack@rabi.phys.columbia.edu>.

1998-02-05  Andreas Jaeger  <aj@arthur.rhein-neckar.de>

	* sysdeps/unix/sysv/linux/syscalls.list: Fix typo in lchown.

1998-02-03  Andreas Jaeger  <aj@arthur.rhein-neckar.de>

	* sysdeps/gnu/Makefile: Respect with-cvs variable.

	* manual/errno.texi (Error Messages): Correct description of
	strerror_r.  Pointed out by jonas@bagge.se.

1998-01-29  Andreas Jaeger  <aj@arthur.rhein-neckar.de>

	* manual/socket.texi (Host Address Functions): Clarify description 
	of inet_network.

1998-02-07  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* sysdeps/unix/grantpt.c (argv): Move const to toplevel.
	(grantpt): Delete superfluous cast.

1998-02-06  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* Makefile ($(inst_slibdir)/libc-$(version).so): Depend on
	elf/ldso_install instead of elf/subdir_install.
	(elf/ldso_install): New target.

	* elf/Makefile (ldso_install): New target.

1998-02-07  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* sysdeps/unix/sysv/linux/powerpc/socket.S: Really do the change
	of 1998-01-06.

1998-02-07  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* string/bits/string2.h (strcmp): Use __string2_1bptr_p only for
	constant expressions.

1998-02-07  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* nss/test-netdb.c: Include <unistd.h> for gethostname and "nss.h"
	for __nss_configure_lookup.
	(output_hostent): Remove unused variable.

1998-02-07  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* string/tst-inlcall.c: Fix format string.

1998-02-09  Andreas Jaeger  <aj@arthur.rhein-neckar.de>

	* inet/netinet/in.h: Rename second parameter of bindresvport to
	avoid buggy gcc warning. [PR libc/412]
1998-02-10 20:06:30 +00:00

347 lines
12 KiB
C
Raw Blame History

This file contains invisible Unicode characters

This file contains invisible Unicode characters that are indistinguishable to humans but may be processed differently by a computer. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

/* 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 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 Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. 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>
/*
*/
#ifndef ASSEMBLER
/* Define the macros `_' and `N_' for conveniently marking translatable
strings in the libc source code. */
# define N_(msgid) msgid
# include <libintl.h>
extern const char _libc_intl_domainname[];
# ifdef dgettext
/* This is defined as an optimizing macro, so use it. */
# define _(msgid) dgettext (_libc_intl_domainname, (msgid))
# else
/* Be sure to use only the __ name when `dgettext' is a plain function
instead of an optimizing macro. */
# define _(msgid) __dgettext (_libc_intl_domainname, (msgid))
# endif
#endif
/*
*/
/* 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
/* Define ALIAS as a strong alias for ORIGINAL. */
#ifdef HAVE_ASM_SET_DIRECTIVE
# define strong_alias_asm(original, alias) \
ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME (alias); \
.set C_SYMBOL_NAME (alias),C_SYMBOL_NAME (original)
# ifdef ASSEMBLER
# define strong_alias(original, alias) strong_alias_asm (original, alias)
# else
# define strong_alias(original, alias) \
asm (__string_1 (ASM_GLOBAL_DIRECTIVE) " " __SYMBOL_PREFIX #alias "\n" \
".set " __SYMBOL_PREFIX #alias "," __SYMBOL_PREFIX #original);
# endif
#else
# define strong_alias_asm(original, alias) \
ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME (alias); \
C_SYMBOL_NAME (alias) = C_SYMBOL_NAME (original)
# ifdef ASSEMBLER
# define strong_alias(original, alias) strong_alias_asm (original, alias)
# else
# define strong_alias(original, alias) \
asm (__string_1 (ASM_GLOBAL_DIRECTIVE) " " __SYMBOL_PREFIX #alias "\n" \
__SYMBOL_PREFIX #alias " = " __SYMBOL_PREFIX #original);
# endif
#endif
/* Helper macros used above. */
#define __string_1(x) __string_0(x)
#define __string_0(x) #x
#ifdef HAVE_WEAK_SYMBOLS
# ifdef ASSEMBLER
# ifdef HAVE_ASM_WEAKEXT_DIRECTIVE
/* Define ALIAS as a weak alias for ORIGINAL.
If weak aliases are not available, this defines a strong alias. */
# define weak_alias(original, alias) \
.weakext C_SYMBOL_NAME (alias), C_SYMBOL_NAME (original)
/* Declare SYMBOL as weak undefined symbol (resolved to 0 if not defined). */
# define weak_extern(symbol) \
.weakext C_SYMBOL_NAME (symbol)
# else /* ! HAVE_ASM_WEAKEXT_DIRECTIVE */
/* Define ALIAS as a weak alias for ORIGINAL.
If weak aliases are not available, this defines a strong alias. */
# define weak_alias(original, alias) \
.weak C_SYMBOL_NAME (alias); \
C_SYMBOL_NAME (alias) = C_SYMBOL_NAME (original)
/* Declare SYMBOL as weak undefined symbol (resolved to 0 if not defined). */
# define weak_extern(symbol) \
.weak C_SYMBOL_NAME (symbol)
# endif /* ! HAVE_ASM_WEAKEXT_DIRECTIVE */
# else /* ! ASSEMBLER */
# ifdef HAVE_ASM_WEAKEXT_DIRECTIVE
# define weak_extern_asm(symbol) asm (".weakext " __SYMBOL_PREFIX #symbol);
# define weak_alias_asm(original, alias) \
asm (".weakext " __SYMBOL_PREFIX #alias ", " __SYMBOL_PREFIX #original);
# else /* ! HAVE_ASM_WEAKEXT_DIRECTIVE */
# define weak_extern_asm(symbol) asm (".weak " __SYMBOL_PREFIX #symbol);
# define weak_alias_asm(original, alias) \
asm (".weak " __SYMBOL_PREFIX #alias "\n" \
__SYMBOL_PREFIX #alias " = " __SYMBOL_PREFIX #original);
# endif /* ! HAVE_ASM_WEAKEXT_DIRECTIVE */
# define weak_alias(o, a) weak_alias_asm (o, a)
# define weak_extern(symbol) weak_extern_asm (symbol)
# endif /* ! ASSEMBLER */
#else
# define weak_alias(original, alias) strong_alias(original, alias)
# define weak_extern(symbol) /* Do nothing; the ref will be strong. */
#endif
#if (!defined ASSEMBLER && \
(__GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 7)))
/* GCC 2.7 and later has special syntax for weak symbols and aliases.
Using that is better when possible, because the compiler and assembler
are better clued in to what we are doing. */
# undef strong_alias
# define strong_alias(name, aliasname) \
extern __typeof (name) aliasname __attribute__ ((alias (#name)));
# ifdef HAVE_WEAK_SYMBOLS
# undef weak_alias
# define weak_alias(name, aliasname) \
extern __typeof (name) aliasname __attribute__ ((weak, 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__))
# endif /* HAVE_WEAK_SYMBOLS. */
#endif /* Not ASSEMBLER, and GCC 2.7 or later. */
#ifndef weak_function
/* If we do not have the __attribute__ ((weak)) syntax, there is no way we
can define functions as weak symbols. The compiler will emit a `.globl'
directive for the function symbol, and a `.weak' directive in addition
will produce an error from the assembler. */
# define weak_function /* empty */
# define weak_const_function /* empty */
#endif
/* 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
/* 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 "; .previous");
# elif defined (HAVE_ASM_POPSECTION_DIRECTIVE)
# define __make_section_unallocated(section_string) \
asm(".pushsection " section_string "; .popsection");
# else
# define __make_section_unallocated(section_string)
# endif
# define link_warning(symbol, msg) \
__make_section_unallocated (".gnu.warning." #symbol) \
static const char __evoke_link_warning_##symbol[] \
__attribute__ ((section (".gnu.warning." #symbol))) = msg;
# else
# define link_warning(symbol, msg) \
asm(".stabs \"" msg "\",30,0,0,0\n" \
".stabs \"" __SYMBOL_PREFIX #symbol "\",1,0,0,0\n");
# 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 PIC
/* 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. */
# 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.
# 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. */
#endif /* Have GNU ld. */
#if DO_VERSIONING
# 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
#endif /* libc-symbols.h */