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Diffstat (limited to 'libc/string/generic/bp-checks.h')
| -rw-r--r-- | libc/string/generic/bp-checks.h | 129 |
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_ */ |