1 files changed, 70 insertions, 0 deletions
diff --git a/sysdeps/generic/bp-start.h b/sysdeps/generic/bp-start.h
new file mode 100644
index 0000000000..3c440fdaba
--- /dev/null
+++ b/sysdeps/generic/bp-start.h
@@ -0,0 +1,70 @@
+/* Copyright (C) 2000 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.  */
+
+
+#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