1// SPDX-License-Identifier: BSD-2-Clause 2/*- 3 * Copyright (c) 2015-2016 Ruslan Bukin <br@bsdpad.com> 4 * All rights reserved. 5 * 6 * Portions of this software were developed by SRI International and the 7 * University of Cambridge Computer Laboratory under DARPA/AFRL contract 8 * FA8750-10-C-0237 ("CTSRD"), as part of the DARPA CRASH research programme. 9 * 10 * Portions of this software were developed by the University of Cambridge 11 * Computer Laboratory as part of the CTSRD Project, with support from the 12 * UK Higher Education Innovation Fund (HEIF). 13 * 14 * Redistribution and use in source and binary forms, with or without 15 * modification, are permitted provided that the following conditions 16 * are met: 17 * 1. Redistributions of source code must retain the above copyright 18 * notice, this list of conditions and the following disclaimer. 19 * 2. Redistributions in binary form must reproduce the above copyright 20 * notice, this list of conditions and the following disclaimer in the 21 * documentation and/or other materials provided with the distribution. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36#define ENTRY(sym) \ 37 .text; .globl sym; .type sym,@function; sym: 38#define END(sym) .size sym, . - sym 39 40 41ENTRY(setjmp) 42 /* Store the stack pointer */ 43 sd sp, (0 * 8)(a0) 44 addi a0, a0, (1 * 8) 45 46 /* Store the general purpose registers and ra */ 47 sd s0, (0 * 8)(a0) 48 sd s1, (1 * 8)(a0) 49 sd s2, (2 * 8)(a0) 50 sd s3, (3 * 8)(a0) 51 sd s4, (4 * 8)(a0) 52 sd s5, (5 * 8)(a0) 53 sd s6, (6 * 8)(a0) 54 sd s7, (7 * 8)(a0) 55 sd s8, (8 * 8)(a0) 56 sd s9, (9 * 8)(a0) 57 sd s10, (10 * 8)(a0) 58 sd s11, (11 * 8)(a0) 59 sd ra, (12 * 8)(a0) 60 addi a0, a0, (13 * 8) 61 62 /* Return value */ 63 li a0, 0 64 ret 65END(setjmp) 66 67ENTRY(longjmp) 68 /* Restore the stack pointer */ 69 ld t0, 0(a0) 70 mv sp, t0 71 addi a0, a0, (1 * 8) 72 73 /* Restore the general purpose registers and ra */ 74 ld s0, (0 * 8)(a0) 75 ld s1, (1 * 8)(a0) 76 ld s2, (2 * 8)(a0) 77 ld s3, (3 * 8)(a0) 78 ld s4, (4 * 8)(a0) 79 ld s5, (5 * 8)(a0) 80 ld s6, (6 * 8)(a0) 81 ld s7, (7 * 8)(a0) 82 ld s8, (8 * 8)(a0) 83 ld s9, (9 * 8)(a0) 84 ld s10, (10 * 8)(a0) 85 ld s11, (11 * 8)(a0) 86 ld ra, (12 * 8)(a0) 87 addi a0, a0, (13 * 8) 88 89 /* Load the return value */ 90 mv a0, a1 91 ret 92END(longjmp) 93