| 1 | /*- |
| 2 | * Copyright (c) 2014 Andrew Turner |
| 3 | * Copyright (c) 2014-2015 The FreeBSD Foundation |
| 4 | * All rights reserved. |
| 5 | * |
| 6 | * This software was developed by Andrew Turner under |
| 7 | * sponsorship from the FreeBSD Foundation. |
| 8 | * |
| 9 | * Redistribution and use in source and binary forms, with or without |
| 10 | * modification, are permitted provided that the following conditions |
| 11 | * are met: |
| 12 | * 1. Redistributions of source code must retain the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer. |
| 14 | * 2. Redistributions in binary form must reproduce the above copyright |
| 15 | * notice, this list of conditions and the following disclaimer in the |
| 16 | * documentation and/or other materials provided with the distribution. |
| 17 | * |
| 18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
| 19 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 20 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 21 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| 22 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 23 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 24 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 25 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 26 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 27 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 28 | * SUCH DAMAGE. |
| 29 | */ |
| 30 | |
| 31 | #ifdef __arm__ |
| 32 | #include <arm/setjmp.h> |
| 33 | #else /* !__arm__ */ |
| 34 | |
| 35 | #ifndef _MACHINE_SETJMP_H_ |
| 36 | #define _MACHINE_SETJMP_H_ |
| 37 | |
| 38 | #include <sys/cdefs.h> |
| 39 | |
| 40 | /* |
| 41 | * We need to store: |
| 42 | * - A magic value to differentiate the buffers |
| 43 | * - The stack pointer |
| 44 | * - The link register |
| 45 | * - 11 general purpose registers |
| 46 | * - 8 floating point registers |
| 47 | * - The signal mask (128 bits) |
| 48 | * i.e. 24 64-bit words, round this up to 31(+1) 128-bit words to allow for |
| 49 | * CPU extensions with larger registers and stronger alignment requirements. |
| 50 | * |
| 51 | * The registers to save are: r19 to r29, and d8 to d15. |
| 52 | */ |
| 53 | #define _JBLEN 31 |
| 54 | #define _JB_SIGMASK 22 |
| 55 | |
| 56 | /* This should only be needed in libc and may change */ |
| 57 | #ifdef __ASSEMBLER__ |
| 58 | #define _JB_MAGIC__SETJMP 0xfb5d25837d7ff700 |
| 59 | #define _JB_MAGIC_SETJMP 0xfb5d25837d7ff701 |
| 60 | #endif |
| 61 | |
| 62 | #ifndef __ASSEMBLER__ |
| 63 | /* |
| 64 | * jmp_buf and sigjmp_buf are encapsulated in different structs to force |
| 65 | * compile-time diagnostics for mismatches. The structs are the same |
| 66 | * internally to avoid some run-time errors for mismatches. |
| 67 | */ |
| 68 | #if __BSD_VISIBLE || __POSIX_VISIBLE || __XSI_VISIBLE |
| 69 | typedef struct _sigjmp_buf { __int128_t _sjb[_JBLEN + 1]; } sigjmp_buf[1]; |
| 70 | #endif |
| 71 | |
| 72 | typedef struct _jmp_buf { __int128_t _jb[_JBLEN + 1]; } jmp_buf[1]; |
| 73 | #endif /* __ASSEMBLER__ */ |
| 74 | |
| 75 | #endif /* !_MACHINE_SETJMP_H_ */ |
| 76 | |
| 77 | #endif /* !__arm__ */ |