/usr/msp430/include/iomacros.h is in msp430mcu 20120406-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* Copyright (c) 2011, Peter A. Bigot (pabigot@users.sourceforge.net)
* All rights reserved.
*
* 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.
*
* * Neither the name of the copyright owner nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* 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.
* ============================================================================
*/
/* Glue to convert TI-provided headers to GCC-compatible declarations */
#if !defined(__MSP430_IOMACROS_H_)
#define __MSP430_IOMACROS_H_
#if defined(__ASSEMBLER__)
#define sfrb(x,x_) x=x_
#define sfrw(x,x_) x=x_
#define sfra(x,x_) x=x_
#define const_sfrb(x,x_) sfrb(x,x_)
#define const_sfrw(x,x_) sfrw(x,x_)
#define const_sfra(x,x_) sfra(x,x_)
#else /* __ASSEMBLER__ */
#define sfrb_(x,x_) volatile unsigned char x __asm__("__" #x)
#define sfrb(x,x_) extern sfrb_(x,x_)
#define sfrw_(x,x_) volatile unsigned int x __asm__("__" #x)
#define sfrw(x,x_) extern sfrw_(x,x_)
#define sfra_(x,x_) volatile unsigned long int x __asm__("__" #x)
#define sfra(x,x_) extern sfra_(x,x_)
#define const_sfrb(x,x_) extern const sfrb_(x,x_)
#define const_sfrw(x,x_) extern const sfrw_(x,x_)
#define const_sfra(x,x_) extern const sfra_(x,x_)
#ifdef __GNUC__
#define __interrupt __attribute__((__interrupt__))
#endif /* __GNUC__ */
#endif /* __ASSEMBLER__ */
#endif /* __MSP430_IOMACROS_H_ */
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