/*- * Copyright (c) 2014 Andrew Turner * Copyright (c) 2014-2015 The FreeBSD Foundation * All rights reserved. * * This software was developed by Andrew Turner under * sponsorship from the FreeBSD Foundation. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. 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 AUTHOR 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 AUTHOR 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. * * $FreeBSD$ */ #ifndef _MACHINE_SETJMP_H_ #define _MACHINE_SETJMP_H_ #include <sys/cdefs.h> /* * We need to store: * - A magic value to differentiate the buffers * - The stack pointer * - The link register * - 11 general purpose registers * - 8 floating point registers * - The signal mask (128 bits) * i.e. 24 64-bit words, round this up to 31(+1) 128-bit words to allow for * CPU extensions with larger registers and stronger alignment requirements. * * The registers to save are: r19 to r29, and d8 to d15. */ #define _JBLEN 31 #define _JB_SIGMASK 22 /* This should only be needed in libc and may change */ #ifdef __ASSEMBLER__ #define _JB_MAGIC__SETJMP 0xfb5d25837d7ff700 #define _JB_MAGIC_SETJMP 0xfb5d25837d7ff701 #endif #ifndef __ASSEMBLER__ /* * jmp_buf and sigjmp_buf are encapsulated in different structs to force * compile-time diagnostics for mismatches. The structs are the same * internally to avoid some run-time errors for mismatches. */ #if __BSD_VISIBLE || __POSIX_VISIBLE || __XSI_VISIBLE typedef struct _sigjmp_buf { __int128_t _sjb[_JBLEN + 1]; } sigjmp_buf[1]; #endif typedef struct _jmp_buf { __int128_t _jb[_JBLEN + 1]; } jmp_buf[1]; #endif /* __ASSEMBLER__ */ #endif /* !_MACHINE_SETJMP_H_ */ |