1/* 2 Copyright (c) 2011, 2012 ARM Ltd 3 All rights reserved. 4 5 Redistribution and use in source and binary forms, with or without 6 modification, are permitted provided that the following conditions 7 are met: 8 1. Redistributions of source code must retain the above copyright 9 notice, this list of conditions and the following disclaimer. 10 2. Redistributions in binary form must reproduce the above copyright 11 notice, this list of conditions and the following disclaimer in the 12 documentation and/or other materials provided with the distribution. 13 3. The name of the company may not be used to endorse or promote 14 products derived from this software without specific prior written 15 permission. 16 17 THIS SOFTWARE IS PROVIDED BY ARM LTD ``AS IS'' AND ANY EXPRESS OR IMPLIED 18 WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 19 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 IN NO EVENT SHALL ARM LTD BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED 22 TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 23 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 24 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 25 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 26 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29#define GPR_LAYOUT \ 30 REG_PAIR (x19, x20, 0); \ 31 REG_PAIR (x21, x22, 16); \ 32 REG_PAIR (x23, x24, 32); \ 33 REG_PAIR (x25, x26, 48); \ 34 REG_PAIR (x27, x28, 64); \ 35 REG_PAIR (x29, x30, 80); \ 36 REG_ONE (x16, 96) 37 38#define FPR_LAYOUT \ 39 REG_PAIR ( d8, d9, 112); \ 40 REG_PAIR (d10, d11, 128); \ 41 REG_PAIR (d12, d13, 144); \ 42 REG_PAIR (d14, d15, 160); 43 44// int setjmp (jmp_buf) 45 .global setjmp 46 .type setjmp, %function 47setjmp: 48 mov x16, sp 49#define REG_PAIR(REG1, REG2, OFFS) stp REG1, REG2, [x0, OFFS] 50#define REG_ONE(REG1, OFFS) str REG1, [x0, OFFS] 51 GPR_LAYOUT 52 FPR_LAYOUT 53#undef REG_PAIR 54#undef REG_ONE 55 mov w0, #0 56 ret 57 .size setjmp, .-setjmp 58 59// void longjmp (jmp_buf, int) __attribute__ ((noreturn)) 60 .global longjmp 61 .type longjmp, %function 62longjmp: 63#define REG_PAIR(REG1, REG2, OFFS) ldp REG1, REG2, [x0, OFFS] 64#define REG_ONE(REG1, OFFS) ldr REG1, [x0, OFFS] 65 GPR_LAYOUT 66 FPR_LAYOUT 67#undef REG_PAIR 68#undef REG_ONE 69 mov sp, x16 70 cmp w1, #0 71 cinc w0, w1, eq 72 // use br not ret, as ret is guaranteed to mispredict 73 br x30 74 .size longjmp, .-longjmp 75