mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-25 04:01:10 +00:00
ab95290c78
2000-06-13 Ulrich Drepper <drepper@redhat.com> * misc/sys/cdefs.h: Define __bounded and __unbounded if __BOUNDED_POINTERS__ is not defined. 2000-06-07 Greg McGary <greg@mcgary.org> * sysdeps/generic/bp-sym.h: New file. * sysdeps/generic/bp-start.h: New file. * sysdeps/i386/elf/start.S: Designate BP symbols. * sysdeps/generic/libc-start.c: Wrap bounds around argv & envp and each of their string members. 2000-06-07 Greg McGary <greg@mcgary.org> * sysdeps/unix/make-syscalls.sh: Add comments to output that aid debugging & comprehension. Map simple syscall signatures to number of args. Generate BP syscall thunk definitions. * sysdeps/generic/bp-thunks.h: New file. * sysdeps/unix/syscalls.list: Replace arg-count with simple return+arg signature. * sysdeps/unix/common/syscalls.list: Likewise. * sysdeps/unix/inet/syscalls.list: Likewise. * sysdeps/unix/mman/syscalls.list: Likewise. * sysdeps/unix/sysv/syscalls.list: Likewise. * sysdeps/unix/sysv/linux/syscalls.list: Likewise. * sysdeps/unix/sysv/linux/i386/syscalls.list: Likewise. 2000-06-07 Greg McGary <greg@mcgary.org> * Makeconfig (CPPFLAGS-.ob): pass -fbounded-pointers for all files *.[cS]. (CFLAGS-.ob): Don't optimize sibling calls. (bppfx): New variable. * Makerules (elide-bp-thunks): New variable. (elide-routines.*): Elide BP-* files for all but *.ob. (sources): Include bp-thunks. * iconv/gconv_simple.c: Remove unnecessary prototype. * iconv/gconv_trans.c: Pretty print.
71 lines
2.5 KiB
C
71 lines
2.5 KiB
C
/* 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
|