Update.

* elf/Makefile: Add rules to build and run initfirst test.
	* elf/initfirst.c: New file.
	* elf/firstobj.c: New file.

ChangeLog

@@ -1,5 +1,9 @@
 2001-02-01  Ulrich Drepper  <drepper@redhat.com>
 
+	* elf/Makefile: Add rules to build and run initfirst test.
+	* elf/initfirst.c: New file.
+	* elf/firstobj.c: New file.
+
 	* Makerules (build-shlib): Add $(extra-B-$(@F:lib%.so=%).so).
 	* configure.in: Test for -z initfirst linker option.
 	* config.make.in: Add have-z-initfirst.

elf/Makefile

@@ -1,4 +1,4 @@
-# Copyright (C) 1995-1999, 2000 Free Software Foundation, Inc.
+# Copyright (C) 1995-1999, 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
@@ -101,7 +101,7 @@ tests = loadtest restest1 preloadtest loadfail multiload origtest resolvfail \
 	constload1 order $(tests-vis-$(have-protected)) noload filter unload \
 	reldep reldep2 reldep3 next $(tests-nodelete-$(have-z-nodelete)) \
 	$(tests-nodlopen-$(have-z-nodlopen)) neededtest neededtest2 \
-	neededtest3 neededtest4 unload2 lateglobal
+	neededtest3 neededtest4 unload2 lateglobal initfirst
 test-srcs = tst-pathopt
 tests-vis-yes = vismain
 tests-nodelete-yes = nodelete
@@ -114,7 +114,7 @@ modules-names = testobj1 testobj2 testobj3 testobj4 testobj5 testobj6 \
 		$(modules-nodlopen-$(have-z-nodlopen)) filtmod1 filtmod2 \
 		reldepmod1 reldepmod2 reldepmod3 reldepmod4 nextmod1 nextmod2 \
 		neededobj1 neededobj2 neededobj3 neededobj4 \
-		neededobj5 neededobj6 \
+		neededobj5 neededobj6 firstobj \
 		unload2mod unload2dep ltglobmod1 ltglobmod2 pathoptobj
 modules-vis-yes = vismod1 vismod2 vismod3
 modules-nodelete-yes = nodelmod1 nodelmod2 nodelmod3 nodelmod4
@@ -268,6 +268,7 @@ $(objpfx)neededobj4.so: $(objpfx)neededobj1.so $(objpfx)neededobj2.so \
 $(objpfx)neededobj6.so: $(objpfx)neededobj5.so
 $(objpfx)unload2mod.so: $(objpfx)unload2dep.so
 $(objpfx)ltglobmod2.so: $(libdl)
+$(objpfx)firstobj.so: $(shared-thread-library)
 
 # filtmod1.so has a special rule
 $(filter-out $(objpfx)filtmod1.so, $(test-modules)): $(objpfx)%.so: $(objpfx)%.os
@@ -388,3 +389,6 @@ $(objpfx)tst-pathopt: $(libdl)
 $(objpfx)tst-pathopt.out: tst-pathopt.sh $(objpfx)tst-pathopt \
 			  $(objpfx)pathoptobj.so
 	$(SHELL) -e $< $(common-objpfx)
+
+$(objpfx)initfirst: $(libdl)
+$(objpfx)initfirst.out: $(objpfx)firstobj.so

elf/firstobj.c

@@ -0,0 +1,8 @@
+#include <errno.h>
+
+int
+foo (void)
+{
+  errno = 0;
+  return 0;
+}

elf/initfirst.c

@@ -0,0 +1,22 @@
+#include <dlfcn.h>
+#include <stdio.h>
+
+int
+main (void)
+{
+  void *h = dlopen ("firstobj.so", RTLD_LAZY);
+  void *f;
+  if (! h)
+    {
+      printf ("cannot find firstobj.so: %s\n", dlerror ());
+      return 1;
+    }
+  f = dlsym (h, "foo");
+  if (! f)
+    {
+      printf ("cannot find symbol foo: %s\n", dlerror ());
+      return 2;
+    }
+  ((void (*) (void)) f) ();
+  return 0;
+}

linuxthreads/ChangeLog

@@ -1,3 +1,12 @@
+2001-02-01  Ulrich Drepper  <drepper@redhat.com>
+
+	* Makefile: Add rules to build crti.o and make it being used in
+	building libpthread.so.
+	* sysdeps/i386/Makefile: New file.
+	* sysdeps/pthread/pt-initfini.c: New file.
+
+	* pthread.c: Cleanups.
+
 2001-01-28  Andreas Jaeger  <aj@suse.de>
 
 	* oldsemaphore.c (__old_sem_init): Adjust for last change.

linuxthreads/Makefile

@@ -38,12 +38,20 @@ libpthread-routines := attr cancel condvar join manager mutex ptfork \
 		       oldsemaphore events getcpuclockid pspinlock barrier
 
 nodelete-yes = -Wl,--enable-new-dtags,-z,nodelete
-LDFLAGS-pthread.so = $(nodelete-$(have-z-nodelete))
+initfirst-yes = -Wl,--enable-new-dtags,-z,initfirst
+LDFLAGS-pthread.so = $(nodelete-$(have-z-nodelete)) \
+		     $(initfirst-$(have-z-initfirst))
 
 vpath %.c Examples
 
 include ../Makeconfig
 
+ifeq ($(build-shared),yes)
+before-compile := $(objpfx)crti.o
+
+CFLAGS-pt-initfini.s = -g0 -fPIC -fno-inline-functions
+endif
+
 librt-tests = ex10 ex11
 tests = ex1 ex2 ex3 ex4 ex5 ex6 ex7 ex8 ex9 $(librt-tests) ex12 ex13 joinrace \
 	tststack $(tests-nodelete-$(have-z-nodelete)) ecmutex ex14 ex15 ex16
@@ -54,6 +62,8 @@ endif
 
 include ../Rules
 
+extra-B-pthread.so = -B$(common-objpfx)linuxthreads/
+
 znodelete-yes = -DHAVE_Z_NODELETE
 CFLAGS-mutex.c += -D__NO_WEAK_PTHREAD_ALIASES
 CFLAGS-specific.c += -D__NO_WEAK_PTHREAD_ALIASES
@@ -80,3 +90,27 @@ ifeq ($(build-bounded),yes)
 $(tests:%=$(objpfx)%-bp): $(objpfx)libpthread_b.a
 $(librt-tests:%=$(objpfx)%-bp): $(common-objpfx)rt/librt_b.a
 endif
+
+ifeq ($(build-shared),yes)
+vpath pt-initfini.c $(full_config_sysdirs)
+
+$(objpfx)pt-initfini.s: pt-initfini.c
+	$(compile.c) -S $(CFLAGS-pt-initfini.s) -finhibit-size-directive \
+		$(patsubst -f%,-fno-%,$(exceptions)) -o $@
+
+# We only have one kind of startup code files.  Static binaries and
+# shared libraries are build using the PIC version.
+$(objpfx)crti.S: $(objpfx)pt-initfini.s
+	sed -n -e '1,/@HEADER_ENDS/p' \
+	       -e '/@_.*_PROLOG_BEGINS/,/@_.*_PROLOG_ENDS/p' \
+	       -e '/@TRAILER_BEGINS/,$$p' $< > $@
+
+$(objpfx)defs.h: $(objpfx)pt-initfini.s
+	sed -n -e '/@TESTS_BEGIN/,/@TESTS_END/p' $< | \
+		$(AWK) -f ../csu/defs.awk > $@
+
+$(objpfx)crti.o: $(objpfx)crti.S $(objpfx)defs.h
+	$(compile.S) -g0 $(ASFLAGS-.os) -o $@
+
+generated += crti.S defs.h pt-initfini.s
+endif

linuxthreads/pthread.c

@@ -375,7 +375,9 @@ is_smp_system (void)
 
 static void pthread_initialize(void) __attribute__((constructor));
 
+#ifndef HAVE_Z_NODELETE
 extern void *__dso_handle __attribute__ ((weak));
+#endif
 
 
 /* Do some minimal initialization which has to be done during the

linuxthreads/sysdeps/i386/Makefile

@@ -0,0 +1,5 @@
+ifeq ($(subdir),linuxthreads)
+# On i686 we must avoid generating the trampoline functions generated
+# to get the GOT pointer.
+CFLAGS-pt-initfini.s += -march=i386 -mcpu=i386
+endif

linuxthreads/sysdeps/pthread/pt-initfini.c

@@ -0,0 +1,140 @@
+/* Special .init and .fini section support.  Linuxthread version.
+   Copyright (C) 1995, 1996, 1997, 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 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 munged by a sed
+   script into two files: crti.s and crtn.s.
+
+   * crti.s 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.
+
+   * crtn.s puts the corresponding function epilogues
+   in the .init and .fini sections. */
+
+#include <stdlib.h>
+
+/* We use embedded asm for .section unconditionally, as this makes it
+   easier to insert the necessary directives into crtn.S. */
+#define SECTION(x) asm (".section " x )
+
+/* Embed an #include to pull in the alignment and .end directives. */
+asm ("\n#include \"defs.h\"");
+
+/* The initial common code ends here. */
+asm ("\n/*@HEADER_ENDS*/");
+
+/* To determine whether we need .end and .align: */
+asm ("\n/*@TESTS_BEGIN*/");
+extern void dummy (void (*foo) (void));
+void
+dummy (void (*foo) (void))
+{
+  if (foo)
+    (*foo) ();
+}
+asm ("\n/*@TESTS_END*/");
+
+/* The beginning of _init:  */
+asm ("\n/*@_init_PROLOG_BEGINS*/");
+
+static void
+call_initialize_minimal (void)
+{
+  __pthread_initialize_minimal ();
+}
+
+static void
+call_gmon_start(void)
+{
+  extern void __gmon_start__ (void) __attribute__ ((weak)); /*weak_extern (__gmon_start__);*/
+  void (*gmon_start) (void) = __gmon_start__;
+
+  if (gmon_start)
+    gmon_start ();
+}
+
+SECTION (".init");
+extern void _init (void);
+void
+_init (void)
+{
+  /* The very first thing we must do is to set up the registers.  */
+  call_initialize_minimal ();
+
+  /* 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.  */
+  call_gmon_start ();
+
+  asm ("ALIGN");
+  asm("END_INIT");
+  /* Now the epilog. */
+  asm ("\n/*@_init_PROLOG_ENDS*/");
+  asm ("\n/*@_init_EPILOG_BEGINS*/");
+  SECTION(".init");
+}
+asm ("END_INIT");
+
+/* End of the _init epilog, beginning of the _fini prolog. */
+asm ("\n/*@_init_EPILOG_ENDS*/");
+asm ("\n/*@_fini_PROLOG_BEGINS*/");
+
+SECTION (".fini");
+extern void _fini (void);
+void
+_fini (void)
+{
+
+  /* End of the _fini prolog. */
+  asm ("ALIGN");
+  asm ("END_FINI");
+  asm ("\n/*@_fini_PROLOG_ENDS*/");
+
+  {
+    /* 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 ();
+  }
+
+  /* Beginning of the _fini epilog. */
+  asm ("\n/*@_fini_EPILOG_BEGINS*/");
+  SECTION (".fini");
+}
+asm ("END_FINI");
+
+/* End of the _fini epilog.  Any further generated assembly (e.g. .ident)
+   is shared between both crt files. */
+asm ("\n/*@_fini_EPILOG_ENDS*/");
+asm ("\n/*@TRAILER_BEGINS*/");
+
+/* End of file. */