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bd1055b8be
The binary mode has no difference from text mode in POSIX-compliant operating systems. The two modes are distinguishable from each other on Windows, and perhaps on other systems as well. The binary stream has scalability and other advantages. Windows treats the standard input stream as text mode by default. So the code changes it to binary mode. Also, add a helper function, nasm_set_binary_mode(), that is OS-agnostic, in the library. Reported-by: Didier Stevens <didier.stevens@gmail.com> Suggested-by: Didier Stevens <didier.stevens@gmail.com> Link: https://bugzilla.nasm.us/show_bug.cgi?id=3392649 Signed-off-by: Chang S. Bae <chang.seok.bae@intel.com>
235 lines
5.9 KiB
C
235 lines
5.9 KiB
C
/* ----------------------------------------------------------------------- *
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*
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* Copyright 1996-2017 The NASM Authors - All Rights Reserved
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* See the file AUTHORS included with the NASM distribution for
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* the specific copyright holders.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following
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* conditions are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* ----------------------------------------------------------------------- */
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#ifndef NASMLIB_FILE_H
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#define NASMLIB_FILE_H
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#include "compiler.h"
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#include "nasmlib.h"
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#include "error.h"
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#include <errno.h>
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#ifdef HAVE_FCNTL_H
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# include <fcntl.h>
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#endif
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#ifdef HAVE_SYS_TYPES_H
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#endif
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#ifdef HAVE_SYS_STAT_H
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# include <sys/stat.h>
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#endif
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#ifdef HAVE_IO_H
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# include <io.h>
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#endif
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#ifdef HAVE_UNISTD_H
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# include <unistd.h>
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#endif
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#ifdef HAVE_SYS_MMAN_H
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# include <sys/mman.h>
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#endif
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#ifndef R_OK
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# define R_OK 4 /* Classic Unix constant, same on Windows */
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#endif
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/* Can we adjust the file size without actually writing all the bytes? */
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#ifdef HAVE__CHSIZE_S
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# define os_ftruncate(fd,size) _chsize_s(fd,size)
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#elif defined(HAVE__CHSIZE)
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# define os_ftruncate(fd,size) _chsize(fd,size)
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#elif defined(HAVE_FTRUNCATE)
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# define os_ftruncate(fd,size) ftruncate(fd,size)
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#endif
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/*
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* On Windows, we want to use _wfopen(), as fopen() has a much smaller limit
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* on the path length that it supports. Furthermore, we want to prefix the
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* path name with \\?\ in order to let the Windows kernel know that
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* we are not limited to PATH_MAX characters. Thus, we wrap all the functions
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* which take filenames...
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*/
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#ifdef _WIN32
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# include <wchar.h>
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typedef wchar_t *os_filename;
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typedef wchar_t os_fopenflag;
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os_filename os_mangle_filename(const char *filename);
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static inline void os_free_filename(os_filename filename)
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{
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nasm_free(filename);
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}
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# define os_fopen _wfopen
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# define os_access _waccess
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/*
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* On Win32/64, we have to use the _wstati64() function. Note that
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* we can't use _wstat64() without depending on a needlessly new
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* version os MSVCRT.
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*/
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typedef struct _stati64 os_struct_stat;
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# define os_stat _wstati64
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# define os_fstat _fstati64
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/*
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* On Win32/64, freopen() and _wfreopen() fails when the mode string
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* is with the letter 'b' that represents to set binary mode. On
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* POSIX operating systems, the 'b' is ignored, without failure.
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*/
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#include <io.h>
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#include <fcntl.h>
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static inline void os_set_binary_mode(FILE *f) {
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int ret = _setmode(_fileno(f), _O_BINARY);
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if (ret == -1) {
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nasm_fatalf(ERR_NOFILE, "unable to open file: %s",
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strerror(errno));
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}
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}
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#else /* not _WIN32 */
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typedef const char *os_filename;
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typedef char os_fopenflag;
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static inline os_filename os_mangle_filename(const char *filename)
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{
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return filename;
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}
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static inline void os_free_filename(os_filename filename)
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{
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(void)filename; /* Nothing to do */
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}
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static inline void os_set_binary_mode(FILE *f) {
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(void)f;
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}
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# define os_fopen fopen
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#if defined(HAVE_FACCESSAT) && defined(AT_EACCESS)
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static inline int os_access(os_filename pathname, int mode)
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{
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return faccessat(AT_FDCWD, pathname, mode, AT_EACCESS);
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}
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# define os_access os_access
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#elif defined(HAVE_ACCESS)
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# define os_access access
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#endif
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#ifdef HAVE_STRUCT_STAT
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typedef struct stat os_struct_stat;
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# ifdef HAVE_STAT
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# define os_stat stat
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# endif
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# ifdef HAVE_FSTAT
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# define os_fstat fstat
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# endif
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#else
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struct dummy_struct_stat {
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int st_mode;
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int st_size;
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};
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typedef struct dummy_struct_stat os_struct_stat;
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#endif
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#endif /* Not _WIN32 */
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#ifdef S_ISREG
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/* all good */
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#elif defined(HAVE_S_ISREG)
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/* exists, but not a macro */
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# define S_ISREG S_ISREG
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#elif defined(S_IFMT) && defined(S_IFREG)
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# define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
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#elif defined(_S_IFMT) && defined(_S_IFREG)
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# define S_ISREG(m) (((m) & _S_IFMT) == _S_IFREG)
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#endif
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#ifdef fileno
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/* all good */
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#elif defined(HAVE_FILENO)
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/* exists, but not a macro */
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# define fileno fileno
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#elif defined(_fileno) || defined(HAVE__FILENO)
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# define fileno _fileno
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#endif
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#ifndef S_ISREG
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# undef os_stat
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# undef os_fstat
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#endif
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/* Disable these functions if they don't support something we need */
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#ifndef fileno
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# undef os_fstat
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# undef os_ftruncate
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# undef HAVE_MMAP
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#endif
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/*
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* If we don't have functional versions of these functions,
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* stub them out so we don't need so many #ifndefs
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*/
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#ifndef os_stat
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static inline int os_stat(os_filename osfname, os_struct_stat *st)
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{
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(void)osfname;
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(void)st;
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return -1;
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}
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#endif
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#ifndef os_fstat
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static inline int os_fstat(int fd, os_struct_stat *st)
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{
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(void)osfname;
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(void)st;
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return -1;
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}
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#endif
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#ifndef S_ISREG
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static inline bool S_ISREG(int m)
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{
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(void)m;
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return false;
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}
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#endif
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#endif /* NASMLIB_FILE_H */
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