Update.

2004-01-13  Ulrich Drepper  <drepper@redhat.com>

	* sysdeps/unix/sysv/linux/dl-execstack.c: Change interface.  Add
	challenge for caller.
	* sysdeps/generic/ldsodefs.h: Change declaration and type of hook
	member in rtld_global appropriately.
	* elf/dl-support.c: Likewise.
	* elf/dl-load.c (_dl_map_object_from_fd): Take additional paramter.
	Pass it on to the changed function.
	(_dl_map_object): Pass new parameter to _dl_map_object_from_fd.

7 files changed, 46 insertions, 19 deletions

diff --git a/ChangeLog b/ChangeLog
index a423abf..e6c4684 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,14 @@
+2004-01-13  Ulrich Drepper  <drepper@redhat.com>
+
+	* sysdeps/unix/sysv/linux/dl-execstack.c: Change interface.  Add
+	challenge for caller.
+	* sysdeps/generic/ldsodefs.h: Change declaration and type of hook
+	member in rtld_global appropriately.
+	* elf/dl-support.c: Likewise.
+	* elf/dl-load.c (_dl_map_object_from_fd): Take additional paramter.
+	Pass it on to the changed function.
+	(_dl_map_object): Pass new parameter to _dl_map_object_from_fd.
+
 2004-01-13  Richard Henderson  <rth@redhat.com>
 
 	* sysdeps/alpha/bits/atomic.h (__arch_compare_and_exchange_xxx_8_int):
diff --git a/elf/dl-load.c b/elf/dl-load.c
index dc993a5..99ca6a0 100644
--- a/elf/dl-load.c
+++ b/elf/dl-load.c
@@ -811,7 +811,7 @@ static
 struct link_map *
 _dl_map_object_from_fd (const char *name, int fd, struct filebuf *fbp,
 			char *realname, struct link_map *loader, int l_type,
-			int mode)
+			int mode, void **stack_endp)
 {
   struct link_map *l = NULL;
   const ElfW(Ehdr) *header;
@@ -1351,7 +1351,7 @@ cannot allocate TLS data structures for initial thread");
     {
       /* The stack is presently not executable, but this module
 	 requires that it be executable.  */
-      errval = (*GL(dl_make_stack_executable_hook)) ();
+      errval = (*GL(dl_make_stack_executable_hook)) (stack_endp);
       if (errval)
 	{
 	  errstring = N_("\
@@ -1949,7 +1949,10 @@ cannot create shared object descriptor"));
 				  N_("cannot open shared object file"));
     }
 
-  return _dl_map_object_from_fd (name, fd, &fb, realname, loader, type, mode);
+  extern void *__libc_stack_end;
+  void *stack_end = __libc_stack_end;
+  return _dl_map_object_from_fd (name, fd, &fb, realname, loader, type, mode,
+				 &stack_end);
 }
 INTDEF (_dl_map_object)
 
diff --git a/elf/dl-support.c b/elf/dl-support.c
index f13fd05..aa255b4 100644
--- a/elf/dl-support.c
+++ b/elf/dl-support.c
@@ -1,5 +1,5 @@
 /* Support for dynamic linking code in static libc.
-   Copyright (C) 1996-2002, 2003 Free Software Foundation, Inc.
+   Copyright (C) 1996-2002, 2003, 2004 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
@@ -136,7 +136,7 @@ ElfW(Word) _dl_stack_flags = PF_R|PF_W|PF_X;
 /* If loading a shared object requires that we make the stack executable
    when it was not, we do it by calling this function.
    It returns an errno code or zero on success.  */
-int (*_dl_make_stack_executable_hook) (void) internal_function
+int (*_dl_make_stack_executable_hook) (void **) internal_function
   = _dl_make_stack_executable;
 
 
diff --git a/nptl/ChangeLog b/nptl/ChangeLog
index d80d531..28588b8 100644
--- a/nptl/ChangeLog
+++ b/nptl/ChangeLog
@@ -1,12 +1,18 @@
+2004-01-13  Ulrich Drepper  <drepper@redhat.com>
+
+	* allocatestack.c (__make_stacks_executable): Change interface.
+	Check parameters.  Pass parameter on to libc counterpart.
+	* pthreadP.h: Change declaration.
+
 2004-01-13  Richard Henderson  <rth@redhat.com>
 
-        * sysdeps/alpha/Makefile: New file.
-        * sysdeps/alpha/tcb-offsets.sym: New file.
-        * sysdeps/unix/sysv/linux/alpha/sysdep-cancel.h (SINGLE_THREAD_P):
-        Use MULTIPLE_THREADS_OFFSET to implement !libpthread !libc version.
+	* sysdeps/alpha/Makefile: New file.
+	* sysdeps/alpha/tcb-offsets.sym: New file.
+	* sysdeps/unix/sysv/linux/alpha/sysdep-cancel.h (SINGLE_THREAD_P):
+	Use MULTIPLE_THREADS_OFFSET to implement !libpthread !libc version.
 
-        * sysdeps/unix/sysv/linux/alpha/lowlevellock.h: Rewrite based
-        on powerpc version.
+	* sysdeps/unix/sysv/linux/alpha/lowlevellock.h: Rewrite based
+	on powerpc version.
 
 2004-01-08  Jakub Jelinek  <jakub@redhat.com>
 
diff --git a/nptl/allocatestack.c b/nptl/allocatestack.c
index 343dd68..02de7f0 100644
--- a/nptl/allocatestack.c
+++ b/nptl/allocatestack.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2002, 2003 Free Software Foundation, Inc.
+/* Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
 
@@ -661,10 +661,16 @@ __deallocate_stack (struct pthread *pd)
 }
 
 
+extern void *__libc_stack_end;
+
 int
 internal_function
-__make_stacks_executable (void)
+__make_stacks_executable (void **stack_endp)
 {
+  /* Challenge the caller.  */
+  if (*stack_endp != __libc_stack_end)
+    return EPERM;
+
 #ifdef NEED_SEPARATE_REGISTER_STACK
   const size_t pagemask = ~(__getpagesize () - 1);
 #endif
@@ -702,7 +708,7 @@ __make_stacks_executable (void)
   lll_unlock (stack_cache_lock);
 
   if (err == 0)
-    err = _dl_make_stack_executable ();
+    err = _dl_make_stack_executable (stack_endp);
 
   return err;
 }
diff --git a/nptl/pthreadP.h b/nptl/pthreadP.h
index 1bfcf35..b051e3b 100644
--- a/nptl/pthreadP.h
+++ b/nptl/pthreadP.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2002, 2003 Free Software Foundation, Inc.
+/* Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
 
@@ -216,7 +216,8 @@ extern void __deallocate_stack (struct pthread *pd)
 extern void __reclaim_stacks (void) attribute_hidden;
 
 /* Make all threads's stacks executable.  */
-int __make_stacks_executable (void) internal_function attribute_hidden;
+extern int __make_stacks_executable (void **stack_endp)
+     internal_function attribute_hidden;
 
 /* longjmp handling.  */
 extern void __pthread_cleanup_upto (__jmp_buf target, char *targetframe);
diff --git a/sysdeps/generic/ldsodefs.h b/sysdeps/generic/ldsodefs.h
index 627ed18..852cf51 100644
--- a/sysdeps/generic/ldsodefs.h
+++ b/sysdeps/generic/ldsodefs.h
@@ -1,5 +1,5 @@
 /* Run-time dynamic linker data structures for loaded ELF shared objects.
-   Copyright (C) 1995-2002, 2003 Free Software Foundation, Inc.
+   Copyright (C) 1995-2002, 2003, 2004 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
@@ -366,7 +366,7 @@ struct rtld_global
   /* If loading a shared object requires that we make the stack executable
      when it was not, we do it by calling this function.
      It returns an errno code or zero on success.  */
-  EXTERN int (*_dl_make_stack_executable_hook) (void) internal_function;
+  EXTERN int (*_dl_make_stack_executable_hook) (void **) internal_function;
 
   /* Keep the conditional TLS members at the end so the layout of the
      structure used by !USE_TLS code matches the prefix of the layout in
@@ -453,7 +453,7 @@ extern void **_dl_initial_error_catch_tsd (void) __attribute__ ((const))
 
 /* This is the initial value of GL(dl_make_stack_executable_hook).
    A threads library can change it.  */
-extern int _dl_make_stack_executable (void) internal_function;
+extern int _dl_make_stack_executable (void **stack_endp) internal_function;
 rtld_hidden_proto (_dl_make_stack_executable)
 
 /* Parameters passed to the dynamic linker.  */