mirror of
https://github.com/netwide-assembler/nasm.git
synced 2024-11-27 08:10:07 +08:00
816f50e5f5
The attributes macro is contained in a header file; this header file needs to be included. Signed-off-by: H. Peter Anvin <hpa@zytor.com>
418 lines
12 KiB
C
418 lines
12 KiB
C
/* ----------------------------------------------------------------------- *
|
|
*
|
|
* Copyright 2007-2023 The NASM Authors - All Rights Reserved
|
|
* See the file AUTHORS included with the NASM distribution for
|
|
* the specific copyright holders.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following
|
|
* conditions are met:
|
|
*
|
|
* * Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* * Redistributions in binary form must reproduce the above
|
|
* copyright notice, this list of conditions and the following
|
|
* disclaimer in the documentation and/or other materials provided
|
|
* with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
|
|
* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
|
|
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
|
|
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
|
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
|
|
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
|
|
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
* ----------------------------------------------------------------------- */
|
|
|
|
/*
|
|
* compiler.h
|
|
*
|
|
* Compiler-specific macros for NASM. Feel free to add support for
|
|
* other compilers in here.
|
|
*
|
|
* This header file should be included before any other header.
|
|
*/
|
|
|
|
#ifndef NASM_COMPILER_H
|
|
#define NASM_COMPILER_H 1
|
|
|
|
/*
|
|
* At least DJGPP and Cygwin have broken header files if __STRICT_ANSI__
|
|
* is defined.
|
|
*/
|
|
#ifdef __GNUC__
|
|
# undef __STRICT_ANSI__
|
|
#endif
|
|
|
|
/* On Microsoft platforms we support multibyte character sets in filenames */
|
|
#define _MBCS 1
|
|
|
|
#include "autoconf/attribute.h"
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
# include "config/config.h"
|
|
#else
|
|
# if defined(_MSC_VER) && (_MSC_VER >= 1310)
|
|
# include "config/msvc.h"
|
|
# elif defined(__WATCOMC__)
|
|
# include "config/watcom.h"
|
|
# else
|
|
# include "config/unknown.h"
|
|
# endif
|
|
/* This unconditionally defines some macros we really want */
|
|
# include "config/unconfig.h"
|
|
#endif /* Configuration file */
|
|
|
|
/* This is required to get the standard <inttypes.h> macros when compiling
|
|
with a C++ compiler. This must be defined *before* <inttypes.h> is
|
|
included, directly or indirectly. */
|
|
#define __STDC_CONSTANT_MACROS 1
|
|
#define __STDC_LIMIT_MACROS 1
|
|
#define __STDC_FORMAT_MACROS 1
|
|
|
|
#ifdef HAVE_INTTYPES_H
|
|
# include <inttypes.h>
|
|
#else
|
|
# include "nasmint.h"
|
|
#endif
|
|
|
|
#include <assert.h>
|
|
#include <stddef.h>
|
|
#include <stdarg.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <limits.h>
|
|
#include <errno.h>
|
|
|
|
#ifdef HAVE_STRINGS_H
|
|
# include <strings.h>
|
|
#endif
|
|
#ifdef HAVE_SYS_TYPES_H
|
|
# include <sys/types.h>
|
|
#endif
|
|
|
|
#ifdef HAVE_ENDIAN_H
|
|
# include <endian.h>
|
|
#elif defined(HAVE_SYS_ENDIAN_H)
|
|
# include <sys/endian.h>
|
|
#elif defined(HAVE_MACHINE_ENDIAN_H)
|
|
# include <machine/endian.h>
|
|
#endif
|
|
|
|
/*
|
|
* If we have BYTE_ORDER defined, or the compiler provides
|
|
* __BIG_ENDIAN__ or __LITTLE_ENDIAN__, trust it over what autoconf
|
|
* came up with, especially since autoconf obviously can't figure
|
|
* things out for a universal compiler.
|
|
*/
|
|
#if defined(__BIG_ENDIAN__) && !defined(__LITTLE_ENDIAN__)
|
|
# undef WORDS_LITTLEENDIAN
|
|
# undef WORDS_BIGENDIAN
|
|
# define WORDS_BIGENDIAN 1
|
|
#elif defined(__LITTLE_ENDIAN__) && !defined(__BIG_ENDIAN__)
|
|
# undef WORDS_LITTLEENDIAN
|
|
# undef WORDS_BIGENDIAN
|
|
# define WORDS_LITTLEENDIAN 1
|
|
#elif defined(BYTE_ORDER) && defined(LITTLE_ENDIAN) && defined(BIG_ENDIAN)
|
|
# undef WORDS_LITTLEENDIAN
|
|
# undef WORDS_BIGENDIAN
|
|
# if BYTE_ORDER == LITTLE_ENDIAN
|
|
# define WORDS_LITTLEENDIAN 1
|
|
# elif BYTE_ORDER == BIG_ENDIAN
|
|
# define WORDS_BIGENDIAN 1
|
|
# endif
|
|
#endif
|
|
|
|
/*
|
|
* Define this to 1 for faster performance if this is a littleendian
|
|
* platform *and* it can do arbitrary unaligned memory references. It
|
|
* is safe to leave it defined to 0 even if that is true.
|
|
*/
|
|
#if defined(__386__) || defined(__i386__) || defined(__x86_64__) \
|
|
|| defined(_M_IX86) || defined(_M_X64)
|
|
# define X86_MEMORY 1
|
|
# undef WORDS_BIGENDIAN
|
|
# undef WORDS_LITTLEENDIAN
|
|
# define WORDS_LITTLEENDIAN 1
|
|
#else
|
|
# define X86_MEMORY 0
|
|
#endif
|
|
|
|
/* Some versions of MSVC have these only with underscores in front */
|
|
#ifndef HAVE_SNPRINTF
|
|
# ifdef HAVE__SNPRINTF
|
|
# define snprintf _snprintf
|
|
# else
|
|
int snprintf(char *, size_t, const char *, ...);
|
|
# endif
|
|
#endif
|
|
|
|
#ifndef HAVE_VSNPRINTF
|
|
# ifdef HAVE__VSNPRINTF
|
|
# define vsnprintf _vsnprintf
|
|
# else
|
|
int vsnprintf(char *, size_t, const char *, va_list);
|
|
# endif
|
|
#endif
|
|
|
|
#if !defined(HAVE_STRLCPY) || !HAVE_DECL_STRLCPY
|
|
size_t strlcpy(char *, const char *, size_t);
|
|
#endif
|
|
|
|
#if !defined(HAVE_STRCHRNUL) || !HAVE_DECL_STRCHRNUL
|
|
char *strrchrnul(const char *, int);
|
|
#endif
|
|
|
|
#ifndef __cplusplus /* C++ has false, true, bool as keywords */
|
|
# ifdef HAVE_STDBOOL_H
|
|
# include <stdbool.h>
|
|
# elif defined(HAVE__BOOL)
|
|
typedef _Bool bool;
|
|
# define false 0
|
|
# define true 1
|
|
# else
|
|
/* This is sort of dangerous, since casts will behave different than
|
|
casting to the standard boolean type. Always use !!, not (bool). */
|
|
typedef enum bool { false, true } bool;
|
|
# endif
|
|
#endif
|
|
|
|
/* Create a NULL pointer of the same type as the address of
|
|
the argument, without actually evaluating said argument. */
|
|
#define nullas(p) (0 ? &(p) : NULL)
|
|
|
|
/* Convert an offsetted NULL pointer dereference to a size_t offset.
|
|
Technically non-portable as taking the offset from a NULL pointer
|
|
is undefined behavior, but... */
|
|
#define null_offset(p) ((size_t)((const char *)&(p) - (const char *)NULL))
|
|
|
|
/* Provide a substitute for offsetof() if we don't have one. This
|
|
variant works on most (but not *all*) systems... */
|
|
#ifndef offsetof
|
|
# define offsetof(t,m) null_offset(((t *)NULL)->m)
|
|
#endif
|
|
|
|
/* If typeof is defined as a macro, assume we have typeof even if
|
|
HAVE_TYPEOF is not declared (e.g. due to not using autoconf.) */
|
|
#ifdef typeof
|
|
# define HAVE_TYPEOF 1
|
|
#endif
|
|
|
|
/* This is like offsetof(), but takes an object rather than a type. */
|
|
#ifndef offsetin
|
|
# ifdef HAVE_TYPEOF
|
|
# define offsetin(p,m) offsetof(typeof(p),m)
|
|
# else
|
|
# define offsetin(p,m) null_offset(nullas(p)->m)
|
|
# endif
|
|
#endif
|
|
|
|
/* The container_of construct: if p is a pointer to member m of
|
|
container class c, then return a pointer to the container of which
|
|
*p is a member. */
|
|
#ifndef container_of
|
|
# define container_of(p, c, m) ((c *)((char *)(p) - offsetof(c,m)))
|
|
#endif
|
|
|
|
/* Some misguided platforms hide the defs for these */
|
|
#if defined(HAVE_STRCASECMP) && !HAVE_DECL_STRCASECMP
|
|
int strcasecmp(const char *, const char *);
|
|
#endif
|
|
|
|
#if defined(HAVE_STRICMP) && !HAVE_DECL_STRICMP
|
|
int stricmp(const char *, const char *);
|
|
#endif
|
|
|
|
#if defined(HAVE_STRNCASECMP) && !HAVE_DECL_STRNCASECMP
|
|
int strncasecmp(const char *, const char *, size_t);
|
|
#endif
|
|
|
|
#if defined(HAVE_STRNICMP) && !HAVE_DECL_STRNICMP
|
|
int strnicmp(const char *, const char *, size_t);
|
|
#endif
|
|
|
|
#if defined(HAVE_STRSEP) && !HAVE_DECL_STRSEP
|
|
char *strsep(char **, const char *);
|
|
#endif
|
|
|
|
#if !HAVE_DECL_STRNLEN
|
|
size_t strnlen(const char *s, size_t maxlen);
|
|
#endif
|
|
|
|
#ifndef HAVE_MEMPCPY
|
|
static inline void *mempcpy(void *dst, const void *src, size_t n)
|
|
{
|
|
return (char *)memcpy(dst, src, n) + n;
|
|
}
|
|
#endif
|
|
|
|
#ifndef HAVE_MEMPSET
|
|
static inline void *mempset(void *dst, int c, size_t n)
|
|
{
|
|
return (char *)memset(dst, c, n) + n;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Hack to support external-linkage inline functions
|
|
*/
|
|
#ifndef HAVE_STDC_INLINE
|
|
# ifdef __GNUC__
|
|
# ifdef __GNUC_STDC_INLINE__
|
|
# define HAVE_STDC_INLINE
|
|
# else
|
|
# define HAVE_GNU_INLINE
|
|
# endif
|
|
# elif defined(__GNUC_GNU_INLINE__)
|
|
/* Some other compiler implementing only GNU inline semantics? */
|
|
# define HAVE_GNU_INLINE
|
|
# elif defined(__STDC_VERSION__)
|
|
# if __STDC_VERSION__ >= 199901L
|
|
# define HAVE_STDC_INLINE
|
|
# endif
|
|
# endif
|
|
#endif
|
|
|
|
#ifdef HAVE_STDC_INLINE
|
|
# define extern_inline inline
|
|
#elif defined(HAVE_GNU_INLINE)
|
|
# define extern_inline extern inline
|
|
# define inline_prototypes
|
|
#else
|
|
# define inline_prototypes
|
|
#endif
|
|
|
|
/*
|
|
* Hints to the compiler that a particular branch of code is more or
|
|
* less likely to be taken.
|
|
*/
|
|
#if HAVE___BUILTIN_EXPECT
|
|
# define likely(x) __builtin_expect(!!(x), 1)
|
|
# define unlikely(x) __builtin_expect(!!(x), 0)
|
|
#else
|
|
# define likely(x) (!!(x))
|
|
# define unlikely(x) (!!(x))
|
|
#endif
|
|
|
|
#define safe_alloc never_null malloc_func
|
|
#define safe_alloc_ptr never_null_ptr malloc_func_ptr
|
|
|
|
#define safe_malloc(s) safe_alloc alloc_size_func1(s)
|
|
#define safe_malloc2(s1,s2) safe_alloc alloc_size_func2(s1,s2)
|
|
#define safe_realloc(s) never_null alloc_size_func1(s)
|
|
#define safe_malloc_ptr(s) safe_alloc_ptr alloc_size_func1_ptr(s)
|
|
#define safe_malloc2_ptr(s1,s2) safe_alloc_ptr alloc_size_func2_ptr(s1,s2)
|
|
#define safe_realloc_ptr(s) never_null_ptr alloc_size_func1_ptr(s)
|
|
|
|
/*
|
|
* How to tell the compiler that a function doesn't return
|
|
*/
|
|
#ifdef HAVE_STDNORETURN_H
|
|
# include <stdnoreturn.h>
|
|
# define no_return noreturn void
|
|
#elif defined(_MSC_VER)
|
|
# define no_return __declspec(noreturn) void
|
|
#else
|
|
# define no_return void noreturn_func
|
|
#endif
|
|
|
|
/*
|
|
* A fatal function is both unlikely and no_return
|
|
*/
|
|
#define fatal_func no_return unlikely_func
|
|
#define fatal_func_ptr no_return unlikely_func_ptr
|
|
|
|
/*
|
|
* How to tell the compiler that a function takes a printf-like string
|
|
*/
|
|
#define printf_func(fmt, list) format_func3(printf,fmt,list)
|
|
#define printf_func_ptr(fmt, list) format_func3_ptr(printf,fmt,list)
|
|
#define vprintf_func(fmt) format_func3(printf,fmt,0)
|
|
#define vprintf_func_ptr(fmt) format_func3_ptr(printf,fmt,0)
|
|
|
|
/* Determine probabilistically if something is a compile-time constant */
|
|
#ifdef HAVE___BUILTIN_CONSTANT_P
|
|
# if defined(__GNUC__) && (__GNUC__ >= 5)
|
|
# define is_constant(x) __builtin_constant_p((x))
|
|
# else
|
|
# define is_constant(x) false
|
|
# endif
|
|
#else
|
|
# define is_constant(x) false
|
|
#endif
|
|
|
|
/*
|
|
* If we can guarantee that a particular expression is constant, use it,
|
|
* otherwise use a different version.
|
|
*/
|
|
#if defined(__GNUC__) && (__GNUC__ >= 3)
|
|
# define not_pedantic_start \
|
|
_Pragma("GCC diagnostic push") \
|
|
_Pragma("GCC diagnostic ignored \"-Wpedantic\"")
|
|
# define not_pedantic_end \
|
|
_Pragma("GCC diagnostic pop")
|
|
#else
|
|
# define not_pedantic_start
|
|
# define not_pedantic_end
|
|
#endif
|
|
|
|
#ifdef HAVE___BUILTIN_CHOOSE_EXPR
|
|
# define if_constant(x,y) __builtin_choose_expr(is_constant(x),(x),(y))
|
|
#else
|
|
# define if_constant(x,y) (y)
|
|
#endif
|
|
|
|
/*
|
|
* The autoconf documentation states:
|
|
*
|
|
* `va_copy'
|
|
* The C99 standard provides `va_copy' for copying `va_list'
|
|
* variables. It may be available in older environments too, though
|
|
* possibly as `__va_copy' (e.g., `gcc' in strict pre-C99 mode).
|
|
* These can be tested with `#ifdef'. A fallback to `memcpy (&dst,
|
|
* &src, sizeof (va_list))' gives maximum portability.
|
|
*/
|
|
#ifndef va_copy
|
|
# ifdef __va_copy
|
|
# define va_copy(dst,src) __va_copy(dst,src)
|
|
# else
|
|
# define va_copy(dst,src) memcpy(&(dst),&(src),sizeof(va_list))
|
|
# endif
|
|
#endif
|
|
|
|
/*
|
|
* If SIZE_MAX is not defined, rely on size_t being unsigned
|
|
*/
|
|
#ifndef SIZE_MAX
|
|
# define SIZE_MAX (((size_t)0) - 1)
|
|
#endif
|
|
|
|
/* Watcom doesn't handle switch statements with 64-bit types, hack around it */
|
|
#ifdef __WATCOMC__
|
|
# define BOGUS_CASE 0x76543210
|
|
|
|
static inline unsigned int watcom_switch_hack(uint64_t x)
|
|
{
|
|
if (x > (uint64_t)UINT_MAX)
|
|
return BOGUS_CASE;
|
|
else
|
|
return (unsigned int)x;
|
|
}
|
|
|
|
# define switch(x) switch(sizeof(x) > sizeof(unsigned int) \
|
|
? watcom_switch_hack(x) : (unsigned int)(x))
|
|
|
|
/* This is to make sure BOGUS_CASE doesn't conflict with anything real... */
|
|
# define default case BOGUS_CASE: default
|
|
#endif
|
|
|
|
#endif /* NASM_COMPILER_H */
|