Update.

1998-03-06 17:04  Ulrich Drepper  <drepper@cygnus.com>

	* libc.map: Add _dl_debug_impcalls, _dl_debug_fd, _dl_sysdep_output,
	__libc_start_main.
	* csu/Makefile (routines): Add libc-start.
	* elf/dl-error.c: Remove declaration of _dl_argv.  Include <unitsd.h>.
	* elf/dl-lookup.c: Likewise.
	* elf/dl-version.c: Likewise.
	* sysdeps/i386/dl-machine.h: Likewise.
	* elf/link.h: Declare _dl_argv, _dl_debug_fd.
	Declare _dl_sysdep_output.  Make _dl_sysdep_fatal, _dl_sysdep_error and
	_dl_sysdep_message macros which use _dl_sysdep_output.
	* elf/dl-fini.c: Write out which destructor is called while debugging.
	* elf/dl-init.c: Likewise for constructor.
	* elf/dl-load.c: Use _dl_debug_message instead of _dl_sysdep_message.
	* elf/dl-misc.c: Remove _dl_sysdep_fatal, _dl_sysdep_error and
	_dl_sysdep_message.  Add _dl_sysdep_output.
	* elf/rtld.c: Recognize LD_DEBUG_OUTPUT.  Set _dl_debug_fd if
	this file can be opened.
	For LD_DEBUG=libs also set _dl_debug_impcalls.
	* sysdeps/generic/dl-cache.c: Include unistd.h.
	* sysdeps/generic/libc-start.c: New file.
	* sysdeps/i386/elf/start.S: Don't call main directly, call
	* sysdeps/unix/sysv/linux/libc-start.c: New file.
	__libc_start_main instead.

	* elf/Makefile ($(objpfx)ld.so): Add $(load-map-file) as dependency.

5 files changed, 62 insertions, 7 deletions

diff --git a/sysdeps/generic/dl-cache.c b/sysdeps/generic/dl-cache.c
index 43a987a1fd..2a2be570e9 100644
--- a/sysdeps/generic/dl-cache.c
+++ b/sysdeps/generic/dl-cache.c
@@ -18,7 +18,7 @@
    Boston, MA 02111-1307, USA.  */
 
 #include <link.h>
-#include <stddef.h>
+#include <unistd.h>
 #include <sys/mman.h>
 
 /* System-dependent function to read a file's whole contents
diff --git a/sysdeps/generic/libc-start.c b/sysdeps/generic/libc-start.c
new file mode 100644
index 0000000000..12419887a1
--- /dev/null
+++ b/sysdeps/generic/libc-start.c
@@ -0,0 +1,24 @@
+/* Copyright (C) 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.  */
+
+int
+__libc_start_main (int (*main) (int, char **, char **), int argc,
+		   char **argv, char **envp)
+{
+  return (*main) (argc, argv, envp);
+}
diff --git a/sysdeps/i386/dl-machine.h b/sysdeps/i386/dl-machine.h
index 2aaa5b7617..394188d0e4 100644
--- a/sysdeps/i386/dl-machine.h
+++ b/sysdeps/i386/dl-machine.h
@@ -1,5 +1,5 @@
 /* Machine-dependent ELF dynamic relocation inline functions.  i386 version.
-   Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
+   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
@@ -302,8 +302,6 @@ elf_machine_plt_value (struct link_map *map, const Elf32_Rel *reloc,
 
 #ifdef RESOLVE
 
-extern char **_dl_argv;
-
 /* Perform the relocation specified by RELOC and SYM (which is fully resolved).
    MAP is the object containing the reloc.  */
 
diff --git a/sysdeps/i386/elf/start.S b/sysdeps/i386/elf/start.S
index 7416c0ace9..e8ed2043ff 100644
--- a/sysdeps/i386/elf/start.S
+++ b/sysdeps/i386/elf/start.S
@@ -1,5 +1,5 @@
 /* Startup code compliant to the ELF i386 ABI.
-   Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
+   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
@@ -88,9 +88,11 @@ _start:
 	call atexit
 	popl %eax
 
-	/* Call the user's main function, and exit with its value.  */
-	call main
+	/* Call the user's main function, and exit with its value.
+	   But let the libc call main.    */
+	movl $main, %eax
 	pushl %eax
+	call __libc_start_main
 	call exit
 	hlt			/* Crash if somehow `exit' does return.  */
 
diff --git a/sysdeps/unix/sysv/linux/libc-start.c b/sysdeps/unix/sysv/linux/libc-start.c
new file mode 100644
index 0000000000..f142195fbc
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/libc-start.c
@@ -0,0 +1,31 @@
+/* Copyright (C) 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.  */
+
+#include <link.h>
+
+int
+__libc_start_main (int (*main) (int, char **, char **), int argc,
+		   char **argv, char **envp)
+{
+#ifdef PIC
+  if (_dl_debug_impcalls)
+    _dl_debug_message ("\ttransferring control: ", argv[0], "\n\n", NULL);
+#endif
+
+  return (*main) (argc, argv, envp);
+}