Sun Jun 4 22:14:11 1995 Roland McGrath <roland@churchy.gnu.ai.mit.edu>

* hurd/Makefile (sig): Added thread-self.
	* hurd/hurd.h: Declare hurd_thread_self.
	* hurd/thread-self.c: New file.

Thu Jun  1 12:17:52 1995  Roland McGrath  <roland@churchy.gnu.ai.mit.edu>

	* elf/rtld.c: Initialize RTLD_MAP.l_type.
	* elf/dl-reloc.c (_dl_relocate_object): Clear LAZY if relocating
 	the dynamic linker itself.

ChangeLog

@@ -1,3 +1,15 @@
+Sun Jun  4 22:14:11 1995  Roland McGrath  <roland@churchy.gnu.ai.mit.edu>
+
+	* hurd/Makefile (sig): Added thread-self.
+	* hurd/hurd.h: Declare hurd_thread_self.
+	* hurd/thread-self.c: New file.
+
+Thu Jun  1 12:17:52 1995  Roland McGrath  <roland@churchy.gnu.ai.mit.edu>
+
+	* elf/rtld.c: Initialize RTLD_MAP.l_type.
+	* elf/dl-reloc.c (_dl_relocate_object): Clear LAZY if relocating
+ 	the dynamic linker itself.
+
 Tue May 30 15:52:32 1995  Roland McGrath  <roland@churchy.gnu.ai.mit.edu>
 
 	* mach/Makefile (server-interfaces): Removed notify and

elf/dl-reloc.c

@@ -76,6 +76,14 @@ _dl_relocate_object (struct link_map *l, int lazy)
     else
       scope = _dl_loaded;
 
+    if (l->l_type == lt_interpreter)
+      /* We cannot be lazy when relocating the dynamic linker itself.  It
+	 was previously relocated eagerly (allowing us to be running now),
+	 and needs always to be fully relocated so it can run without the
+	 aid of run-time fixups (because it's the one to do them), so we
+	 must always re-relocate its PLT eagerly.  */
+      lazy = 0;
+
     ELF_DYNAMIC_RELOCATE (l, lazy, resolve);
 
     /* Restore list frobnication done above for DT_SYMBOLIC.  */

elf/rtld.c

@@ -70,6 +70,13 @@ _dl_start (void *arg)
   /* Relocate ourselves so we can do normal function calls and
      data access using the global offset table.  */
 
+  /* We must initialize `l_type' to make sure it is not `lt_interpreter'.
+     That is the type to describe us, but not during bootstrapping--it
+     indicates to elf_machine_rel{,a} that we were already relocated during
+     bootstrapping, so it must anti-perform each bootstrapping relocation
+     before applying the final relocation when ld.so is linked in as
+     normal a shared library.  */
+  rtld_map.l_type = lt_library;
   ELF_DYNAMIC_RELOCATE (&rtld_map, 0, NULL);
 
 

hurd/Makefile

@@ -52,7 +52,8 @@ routines = hurdstartup hurdinit \
 	   ports-get ports-set hurdports hurdmsg \
 	   $(sig) $(dtable) hurdinline port-cleanup
 sig	= hurdsig hurdfault faultexc siginfo hurd-raise preempt-sig \
-	  trampoline longjmp-ts catch-exc exc2signal hurdkill sigunwind
+	  trampoline longjmp-ts catch-exc exc2signal hurdkill sigunwind \
+	  thread-self
 dtable	= dtable port2fd new-fd alloc-fd intern-fd \
 	  getdport openport \
 	  fd-close fd-read fd-write hurdioctl ctty-input ctty-output

hurd/hurd.h

@@ -281,6 +281,10 @@ extern pid_t __task2pid (task_t task), task2pid (task_t task);
 
 extern task_t __pid2task (pid_t pid), pid2task (pid_t pid);
 
+/* Return the current thread's thread port.  This is a cheap operation (no
+   system call), but it relies on Hurd signal state being set up.  */
+extern thread_t hurd_thread_self (void);
+
 
 /* Return the io server port for file descriptor FD.
    This adds a Mach user reference to the returned port.

hurd/thread-self.c

@@ -0,0 +1,26 @@
+/* Cheap function to get current thread from sigstate without a syscall.
+Copyright (C) 1995 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., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <hurd/signal.h>
+
+thread_t
+hurd_thread_self (void)
+{
+  return _hurd_self_sigstate ()->thread;
+}