summaryrefslogtreecommitdiff
path: root/libc/string/generic/bp-checks.h
diff options
context:
space:
mode:
Diffstat (limited to 'libc/string/generic/bp-checks.h')
-rw-r--r--libc/string/generic/bp-checks.h129
1 files changed, 0 insertions, 129 deletions
diff --git a/libc/string/generic/bp-checks.h b/libc/string/generic/bp-checks.h
deleted file mode 100644
index 08c70aa5d..000000000
--- a/libc/string/generic/bp-checks.h
+++ /dev/null
@@ -1,129 +0,0 @@
-/* Bounded-pointer checking macros for C.
- Copyright (C) 2000 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, write to the Free
- Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- 02111-1307 USA. */
-
-#ifndef _bp_checks_h_
-#define _bp_checks_h_ 1
-
-#if __BOUNDED_POINTERS__
-
-# define BOUNDS_VIOLATED (__builtin_trap (), 0)
-
-/* Verify that pointer's value >= low. Return pointer value. */
-# define CHECK_BOUNDS_LOW(ARG) \
- (((__ptrvalue (ARG) < __ptrlow (ARG)) && BOUNDS_VIOLATED), \
- __ptrvalue (ARG))
-
-/* Verify that pointer's value < high. Return pointer value. */
-# define CHECK_BOUNDS_HIGH(ARG) \
- (((__ptrvalue (ARG) > __ptrhigh (ARG)) && BOUNDS_VIOLATED), \
- __ptrvalue (ARG))
-
-# define _CHECK_N(ARG, N, COND) \
- (((COND) \
- && (__ptrvalue (ARG) < __ptrlow (ARG) \
- || __ptrvalue (ARG) + (N) > __ptrhigh (ARG)) \
- && BOUNDS_VIOLATED), \
- __ptrvalue (ARG))
-
-extern void *__unbounded __ubp_memchr (const void *__unbounded, int, unsigned);
-
-# define _CHECK_STRING(ARG, COND) \
- (((COND) \
- && (__ptrvalue (ARG) < __ptrlow (ARG) \
- || !__ubp_memchr (__ptrvalue (ARG), '\0', \
- (__ptrhigh (ARG) - __ptrvalue (ARG)))) \
- && BOUNDS_VIOLATED), \
- __ptrvalue (ARG))
-
-/* Check bounds of a pointer seated to an array of N objects. */
-# define CHECK_N(ARG, N) _CHECK_N ((ARG), (N), 1)
-/* Same as CHECK_N, but tolerate ARG == NULL. */
-# define CHECK_N_NULL_OK(ARG, N) _CHECK_N ((ARG), (N), __ptrvalue (ARG))
-
-/* Check bounds of a pointer seated to a single object. */
-# define CHECK_1(ARG) CHECK_N ((ARG), 1)
-/* Same as CHECK_1, but tolerate ARG == NULL. */
-# define CHECK_1_NULL_OK(ARG) CHECK_N_NULL_OK ((ARG), 1)
-
-/* Check for NUL-terminator within string's bounds. */
-# define CHECK_STRING(ARG) _CHECK_STRING ((ARG), 1)
-/* Same as CHECK_STRING, but tolerate ARG == NULL. */
-# define CHECK_STRING_NULL_OK(ARG) _CHECK_STRING ((ARG), __ptrvalue (ARG))
-
-/* Check bounds of signal syscall args with type sigset_t. */
-# define CHECK_SIGSET(SET) CHECK_N ((SET), _NSIG / (8 * sizeof *(SET)))
-/* Same as CHECK_SIGSET, but tolerate SET == NULL. */
-# define CHECK_SIGSET_NULL_OK(SET) CHECK_N_NULL_OK ((SET), _NSIG / (8 * sizeof *(SET)))
-
-# if defined (_IOC_SIZESHIFT) && defined (_IOC_SIZEBITS)
-/* Extract the size of the ioctl data and check its bounds. */
-# define CHECK_IOCTL(ARG, CMD) \
- CHECK_N ((const char *) (ARG), \
- (((CMD) >> _IOC_SIZESHIFT) & ((1 << _IOC_SIZEBITS) - 1)))
-# else
-/* We don't know the size of the ioctl data, so the best we can do
- is check that the first byte is within bounds. */
-# define CHECK_IOCTL(ARG, CMD) CHECK_1 ((const char *) ARG)
-# endif
-
-/* Check bounds of `struct flock *' for the locking fcntl commands. */
-# define CHECK_FCNTL(ARG, CMD) \
- (((CMD) == F_GETLK || (CMD) == F_SETLK || (CMD) == F_SETLKW) \
- ? CHECK_1 ((struct flock *) ARG) : (unsigned long) (ARG))
-
-/* Check bounds of an array of mincore residency-status flags that
- cover a region of NBYTES. Such a vector occupies one byte per page
- of memory. */
-# define CHECK_N_PAGES(ARG, NBYTES) \
- ({ int _page_size_ = __sysconf (_SC_PAGE_SIZE); \
- CHECK_N ((const char *) (ARG), \
- ((NBYTES) + _page_size_ - 1) / _page_size_); })
-
-/* Return a bounded pointer with value PTR that satisfies CHECK_N (PTR, N). */
-# define BOUNDED_N(PTR, N) \
- ({ __typeof (PTR) __bounded _p_; \
- __ptrvalue _p_ = __ptrlow _p_ = __ptrvalue (PTR); \
- __ptrhigh _p_ = __ptrvalue _p_ + (N); \
- _p_; })
-
-#else /* !__BOUNDED_POINTERS__ */
-
-/* Do nothing if not compiling with -fbounded-pointers. */
-
-# define BOUNDS_VIOLATED
-# define CHECK_BOUNDS_LOW(ARG) (ARG)
-# define CHECK_BOUNDS_HIGH(ARG) (ARG)
-# define CHECK_1(ARG) (ARG)
-# define CHECK_1_NULL_OK(ARG) (ARG)
-# define CHECK_N(ARG, N) (ARG)
-# define CHECK_N_NULL_OK(ARG, N) (ARG)
-# define CHECK_STRING(ARG) (ARG)
-# define CHECK_SIGSET(SET) (SET)
-# define CHECK_SIGSET_NULL_OK(SET) (SET)
-# define CHECK_IOCTL(ARG, CMD) (ARG)
-# define CHECK_FCNTL(ARG, CMD) (ARG)
-# define CHECK_N_PAGES(ARG, NBYTES) (ARG)
-# define BOUNDED_N(PTR, N) (PTR)
-
-#endif /* !__BOUNDED_POINTERS__ */
-
-#define BOUNDED_1(PTR) BOUNDED_N (PTR, 1)
-
-#endif /* _bp_checks_h_ */