Remove bp-start.h and INIT_ARGV_and_ENVIRON

["Joseph S. Myers" <joseph at codesourcery dot com>]

Continuing the removal of the bitrotten bounded-pointers code, this
patch removes the header bp-start.h and the single use of the
INIT_ARGV_and_ENVIRON macro it defines.  (The code that now uses a
direct assignment instead of that macro uses a variable ubp_ev whose
name is clearly based around bounded pointers concepts, but the right
time to rename that variable would be when uses of __unbounded
etc. (always defined to empty in the absence of bounded pointers) are
removed, rather than in this particular patch.)

Tested x86_64.

2013-01-31  Joseph Myers  <joseph@codesourcery.com>

	[BZ #13550]
	* sysdeps/generic/bp-start.h: Remove file.
	* csu/libc-start.c: Don't include <bp-start.h>.
	(LIBC_START_MAIN): Set up __environ directly instead of using
	INIT_ARGV_and_ENVIRON.
	* sysdeps/unix/sysv/linux/powerpc/libc-start.c: Don't include
	<bp-start.h>.

diff --git a/csu/libc-start.c b/csu/libc-start.c
index 3e62b8a..d4a135f 100644
--- a/csu/libc-start.c
+++ b/csu/libc-start.c
@@ -19,7 +19,6 @@
 #include <stdio.h>
 #include <unistd.h>
 #include <ldsodefs.h>
-#include <bp-start.h>
 #include <bp-sym.h>
 
 extern void __libc_init_first (int argc, char **argv, char **envp);
@@ -140,7 +139,7 @@ LIBC_START_MAIN (int (*main) (int, char **, char ** MAIN_AUXVEC_DECL),
 #ifndef SHARED
   char *__unbounded *__unbounded ubp_ev = &ubp_av[argc + 1];
 
-  INIT_ARGV_and_ENVIRON;
+  __environ = ubp_ev;
 
   /* Store the lowest stack address.  This is done in ld.so if this is
      the code for the DSO.  */
diff --git a/sysdeps/generic/bp-start.h b/sysdeps/generic/bp-start.h
deleted file mode 100644
index 069d616..0000000
--- a/sysdeps/generic/bp-start.h
+++ /dev/null
@@ -1,71 +0,0 @@
-/* Bounded-pointer checking macros for C.
-   Copyright (C) 2000-2013 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-   Contributed by Greg McGary <greg@mcgary.org>
-
-   The GNU C Library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Lesser General Public
-   License as published by the Free Software Foundation; either
-   version 2.1 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
-   Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public
-   License along with the GNU C Library; if not, see
-   <http://www.gnu.org/licenses/>.  */
-
-
-#if __BOUNDED_POINTERS__
-
-  /* The command-line arg vector and environment vector come to us from
-     the OS as an unbounded pointer to an array of unbounded strings.
-     The user's main expects argv and __environ to be bounded pointers
-     to arrays of bounded strings.  */
-# define INIT_ARGV_and_ENVIRON \
-  do {									      \
-    int envc;								      \
-    for (envc = 0; *ubp_ev; ubp_ev++, envc++)				      \
-      ;									      \
-    ubp_ev -= envc;							      \
-									      \
-    /* GKM FIXME: we could save some space by allocating only enough for      \
-       the additional low & high words, and destructively rewriting	      \
-       argv in place.  */						      \
-    __ptrvalue (argv) = __ptrlow (argv)					      \
-      = alloca ((argc + envc + 2) * sizeof (*argv));			      \
-    __ptrhigh (argv) = __ptrvalue (argv) + argc + 1;			      \
-    __ptrvalue (__environ) = __ptrlow (__environ) = __ptrhigh (argv);	      \
-    __ptrhigh (__environ) = __ptrvalue (__environ) + envc + 1;		      \
-    boundify_vector (__environ, ubp_ev);				      \
-    boundify_vector (argv, ubp_av);					      \
-  } while (0)
-
-
-/* Copy an unbounded vector of unbounded strings into a bounded
-   counterpart.  */
-
-static void
-boundify_vector (char **dest, char *__unbounded *__unbounded src)
-{
-  char *__unbounded s;
-  for (; *src; src++, dest++)
-    {
-      __ptrvalue (*dest) = __ptrlow (*dest) = *src;
-      __ptrhigh (*dest) = src[1];
-    }
-  *dest = 0;
-  /* The OS lays out strings contiguously in vector order,
-     so  */
-  for (s = __ptrvalue (dest[-1]); *s; s++)
-    ;
-  __ptrhigh (dest[-1]) = ++s;
-}
-
-#else
-
-# define INIT_ARGV_and_ENVIRON __environ = ubp_ev
-
-#endif
diff --git a/sysdeps/unix/sysv/linux/powerpc/libc-start.c b/sysdeps/unix/sysv/linux/powerpc/libc-start.c
index 5887db0..fb1f9a4 100644
--- a/sysdeps/unix/sysv/linux/powerpc/libc-start.c
+++ b/sysdeps/unix/sysv/linux/powerpc/libc-start.c
@@ -19,7 +19,6 @@
 #include <unistd.h>
 #include <ldsodefs.h>
 #include <sysdep.h>
-#include <bp-start.h>
 #include <bp-sym.h>
 
 

-- 
Joseph S. Myers
joseph@codesourcery.com