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