glibc/csu/initfini.c
Ulrich Drepper 6d52618b15 Update from main archive 961219
Thu Dec 19 23:28:33 1996  Ulrich Drepper  <drepper@cygnus.com>

	* resolv/resolv.h: Update from BIND 4.9.5-P1.
	* resolv/res_comp.c: Likewise.
	* resolv/res_debug.c: Likewise.
	* resolv/Banner: Update version number.

Thu Dec 19 20:58:53 1996  Ulrich Drepper  <drepper@cygnus.com>

	* elf/dlfcn.h: Add extern "C" wrapper.

	* io/utime.h: Don't define NULL since this isn't allowed in POSIX.
	* io/sys/stat.h: Declare `lstat' only if __USE_BSD ||
	__USE_XOPEN_EXTENDED.
	* locale/locale.h: Define NULL.
	* math/math.c: Don't include <errno.h> to define math errors.
	* stdlib/stdlib.h: Likewise.
	* posix/unistd.h: Don't declare environ.
	* posix/sys/utsname.h (struct utsname): Declare member domainname
	as __domainname is !__USE_GNU.
	* signal/signal.h: Declare size_t only if __USE_BSD ||
	__USE_XOPEN_EXTENDED.
	* stdio/stdio.h: Don't declare cuserid when __USE_POSIX, but
	instead when __USE_XOPEN.
	* string/string.h: Define strndup only if __USE_GNU.
	* sysdeps/unix/sysv/linux/clock.c: New file.
	* sysdeps/unix/sysv/linux/timebits.h: Define CLOCKS_PER_SEC as
	1000000 per X/Open standard.
	* features.h: Add code to recognize _POSIX_C_SOURCE value 199309.
	Define __USE_POSIX199309.
	* posix/unistd.h: Declare fdatasync only if __USE_POSIX199309.
	* time/time.c: Declare nanosleep only if __USE_POSIX199309.
	Patches by Rüdiger Helsch <rh@unifix.de>.

	* locale/locale.h: Add declaration of newlocale and freelocale.

	* new-malloc/Makefile (distibute): Add mtrace.awk.
	(dist-routines): Add mcheck and mtrace.
	(install-lib, non-lib.a): Define as libmcheck.a.
	* new-malloc/malloc.h: Add declaration of __malloc_initialized.
	* new-malloc/mcheck.c: New file.
	* new-malloc/mcheck.h: New file.
	* new-malloc/mtrace.c: New file.
	* new-malloc/mtrace.awk: New file.

	* posix/unistd.h: Correct prototype for usleep.
	* sysdeps/unix/bsd/usleep.c: De-ANSI-declfy.  Correct return type.
	* sysdeps/unix/sysv/linux/usleep.c: Real implementation based on
	nanosleep.

	* signal/signal.h: Change protoype of __sigpause to take two
	arguments.  Remove prototype for sigpause.  Add two different
	macros named sigpause selected when __USE_BSD or __USE_XOPEN
	are defined.  This is necessary since the old BSD definition
	of theis function collides with the X/Open definition.
	* sysdeps/posix/sigpause.c: Change function definition to also
	fit X/Open definition.

	* sysdeps/libm-i387/e_exp.S: Make sure stack is empty when the
	function is left.
	* sysdeps/libm-i387/e_expl.S: Likewise.
	Patch by HJ Lu.

1996-12-17  Paul Eggert  <eggert@twinsun.com>

	* many, many files: Spelling corrections.
	* catgets/catgetsinfo.h (mmapped):
	Renamed from mmaped (in struct catalog_info.status).
	* mach/err_kern.sub (err_codes_unix), string/stratcliff.c (main):
	Fix spelling in message.
	* po/libc.pot: Fix spelling in message for `zic'; this anticipates
	a fix in the tzcode distribution.

Wed Dec 18 15:48:02 1996  Ulrich Drepper  <drepper@cygnus.com>

	* time/strftime.c: Implement ^ flag to cause output be converted
	to use upper case characters.

	* time/zic.c: Update from ADO tzcode1996n.

Wed Dec 18 14:29:24 1996  Erik Naggum  <erik@naggum.no>

	* time/strftime.c (add): Don't change global `i' until all is over.
	Define NULL is not already defined.

Tue Dec 17 09:49:03 1996  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* libio/iovsprintf.c (_IO_vsprintf): Change `&sf' to `&sf._sbf._f'
	to avoid the need for a cast.
	* libio/iovsscanf.c (_IO_vsscanf): Likewise.

	* sunrpc/rpc/xdr.h: Add prototype for xdr_free.
1996-12-20 01:39:50 +00:00

154 lines
5.5 KiB
C

/* Special .init and .fini section support.
Copyright (C) 1995, 1996 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.
In addition to the permissions in the GNU Library General Public
License, the Free Software Foundation gives you unlimited
permission to link the compiled version of this file with other
programs, and to distribute those programs without any restriction
coming from the use of this file. (The Library General Public
License restrictions do apply in other respects; for example, they
cover modification of the file, and distribution when not linked
into another program.)
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, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
/* This file is compiled into assembly code which is then surrounded by the
lines `cat > crtcommon.tmp <<\EOF_common' and `EOF_common' and thus
becomes a shell script which creates three files of assembly code.
* The first file is crti.s-new; this puts a function prologue at the
beginning of the .init and .fini sections and defines global symbols for
those addresses, so they can be called as functions.
* The second file is crtn.s-new; this puts the corresponding function
epilogues in the .init and .fini sections.
* The third file is crtcommon.tmp, which is whatever miscellaneous cruft
the compiler generated at the end; it should be appended to both crti.s-new
and crtn.s-new. */
#include <stdlib.h>
#ifdef HAVE_ELF
/* These declarations make the functions go in the right sections when
we define them below. GCC syntax does not allow the attribute
specifications to be in the function definitions themselves. */
void _init (void) __attribute__ ((section (".init")));
void _fini (void) __attribute__ ((section (".fini")));
#define SECTION(x) /* Put nothing extra before the defn. */
#else
/* Some non-ELF systems support .init and .fini sections,
but the __attribute__ syntax only works for ELF. */
#define SECTION(x) asm (".section " x);
#endif
/* End the here document containing the initial common code.
Then move the output file crtcommon.tmp to crti.s-new and crtn.s-new. */
asm ("\nEOF_common\n\
rm -f crti.s-new crtn.s-new\n\
mv crtcommon.tmp crti.s-new\n\
cp crti.s-new crtn.s-new");
/* Extract a `.end' if one is produced by the compiler. */
asm ("fgrep .end >/dev/null 2>&1 <<\\EOF.end && need_end=yes");
void
useless_function (void)
{
return;
}
asm ("\nEOF.end\n");
/* Find out how much alignment is produced by the compiler. */
asm ("align=`awk '$1==\".align\" { if ($2>max) max=$2; } END { print max; }' \
<<\\EOF.align");
void
useless_function2 (void (*foo) (void))
{
if (foo)
(*foo) ();
}
asm ("\nEOF.align\n`\n");
/* Append the .init prologue to crti.s-new. */
asm ("cat >> crti.s-new <<\\EOF.crti.init");
SECTION (".init")
void
_init (void)
{
/* We cannot use the normal constructor mechanism in gcrt1.o because it
appears before crtbegin.o in the link, so the header elt of .ctors
would come after the elt for __gmon_start__. One approach is for
gcrt1.o to reference a symbol which would be defined by some library
module which has a constructor; but then user code's constructors
would come first, and not be profiled. */
extern void __gmon_start__ (void); weak_extern (__gmon_start__)
if (__gmon_start__)
__gmon_start__ ();
/* End the here document containing the .init prologue code.
Then fetch the .section directive just written and append that
to crtn.s-new, followed by the function epilogue. */
asm ("\n\
EOF.crti.init\n\
test -n \"$align\" && echo .align $align >> crti.s-new\n\
test -n \"$need_end\" && echo .end _init >> crti.s-new\n\
fgrep .init crti.s-new >>crtn.s-new\n\
fgrep -v .end >> crtn.s-new <<\\EOF.crtn.init");
}
/* End the here document containing the .init epilogue code.
Then append the .fini prologue to crti.s-new. */
asm ("\nEOF.crtn.init\
\n\
cat >> crti.s-new <<\\EOF.crti.fini");
SECTION (".fini")
void
_fini (void)
{
/* End the here document containing the .fini prologue code.
Then fetch the .section directive just written and append that
to crtn.s-new, followed by the function epilogue. */
asm ("\nEOF.crti.fini\n\
test -n \"$align\" && echo .align $align >> crti.s-new\n\
test -n \"$need_end\" && echo .end _fini >> crti.s-new\n\
cat > /dev/null <<\\EOF.fini.skip");
{
/* Let GCC know that _fini is not a leaf function by having a dummy
function call here. We arrange for this call to be omitted from
either crt file. */
extern void i_am_not_a_leaf (void);
i_am_not_a_leaf ();
}
asm ("\nEOF.fini.skip\
\n\
fgrep .fini crti.s-new >>crtn.s-new\n\
fgrep -v .end >> crtn.s-new <<\\EOF.crtn.fini");
}
/* End the here document containing the .fini epilogue code.
Finally, put the remainder of the generated assembly into crtcommon.tmp. */
asm ("\nEOF.crtn.fini\
\n\
cat > crtcommon.tmp <<\\EOF_common");