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fc5e0925d4
A sufficiently mad compiler optimiser can take undefined behaviour according to the C standard as an opportunity to remove code. Since "data + size" might be seen to be past the end of an array, calculating such an expression is UB. _mul_overflow is infrastructure for later patches. * bucomm.h (_mul_overflow): Define. * dwarf.c (get_encoded_value): Avoid pointer UB.
92 lines
2.5 KiB
C
92 lines
2.5 KiB
C
/* bucomm.h -- binutils common include file.
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Copyright (C) 1991-2021 Free Software Foundation, Inc.
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This file is part of GNU Binutils.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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MA 02110-1301, USA. */
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#ifndef _BUCOMM_H
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#define _BUCOMM_H
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/* In bucomm.c. */
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/* Return the filename in a static buffer. */
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const char *bfd_get_archive_filename (const bfd *);
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void bfd_nonfatal (const char *);
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void bfd_nonfatal_message (const char *, const bfd *, const asection *,
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const char *, ...);
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void bfd_fatal (const char *) ATTRIBUTE_NORETURN;
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void report (const char *, va_list) ATTRIBUTE_PRINTF(1,0);
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void fatal (const char *, ...) ATTRIBUTE_PRINTF_1 ATTRIBUTE_NORETURN;
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void non_fatal (const char *, ...) ATTRIBUTE_PRINTF_1;
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void set_default_bfd_target (void);
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void list_matching_formats (char **);
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void list_supported_targets (const char *, FILE *);
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void list_supported_architectures (const char *, FILE *);
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int display_info (void);
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void print_arelt_descr (FILE *, bfd *, bool, bool);
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char *make_tempname (const char *, int *);
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char *make_tempdir (const char *);
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bfd_vma parse_vma (const char *, const char *);
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off_t get_file_size (const char *);
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bool is_valid_archive_path (char const *);
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extern char *program_name;
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/* In filemode.c. */
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void mode_string (unsigned long, char *);
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/* In version.c. */
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extern void print_version (const char *);
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/* In rename.c. */
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extern void set_times (const char *, const struct stat *);
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extern int smart_rename (const char *, const char *, int,
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struct stat *, bool);
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/* In libiberty. */
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void *xmalloc (size_t);
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void *xrealloc (void *, size_t);
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#if __GNUC__ >= 7
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#define _mul_overflow(a, b, res) __builtin_mul_overflow (a, b, res)
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#else
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/* Assumes unsigned values. Careful! Args evaluated multiple times. */
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#define _mul_overflow(a, b, res) \
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((*res) = (a), (*res) *= (b), (b) != 0 && (*res) / (b) != (a))
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#endif
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#endif /* _BUCOMM_H */
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