1 | /******************************************************************************* |
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2 | * |
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3 | * Copyright (c) 1993 Intel Corporation |
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4 | * |
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5 | * Intel hereby grants you permission to copy, modify, and distribute this |
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6 | * software and its documentation. Intel grants this permission provided |
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7 | * that the above copyright notice appears in all copies and that both the |
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8 | * copyright notice and this permission notice appear in supporting |
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9 | * documentation. In addition, Intel grants this permission provided that |
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10 | * you prominently mark as "not part of the original" any modifications |
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11 | * made to this software or documentation, and that the name of Intel |
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12 | * Corporation not be used in advertising or publicity pertaining to |
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13 | * distribution of the software or the documentation without specific, |
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14 | * written prior permission. |
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15 | * |
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16 | * Intel Corporation provides this AS IS, WITHOUT ANY WARRANTY, EXPRESS OR |
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17 | * IMPLIED, INCLUDING, WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY |
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18 | * OR FITNESS FOR A PARTICULAR PURPOSE. Intel makes no guarantee or |
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19 | * representations regarding the use of, or the results of the use of, |
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20 | * the software and documentation in terms of correctness, accuracy, |
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21 | * reliability, currentness, or otherwise; and you rely on the software, |
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22 | * documentation and results solely at your own risk. |
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23 | * |
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24 | * IN NO EVENT SHALL INTEL BE LIABLE FOR ANY LOSS OF USE, LOSS OF BUSINESS, |
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25 | * LOSS OF PROFITS, INDIRECT, INCIDENTAL, SPECIAL OR CONSEQUENTIAL DAMAGES |
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26 | * OF ANY KIND. IN NO EVENT SHALL INTEL'S TOTAL LIABILITY EXCEED THE SUM |
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27 | * PAID TO INTEL FOR THE PRODUCT LICENSED HEREUNDER. |
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28 | * |
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29 | ******************************************************************************/ |
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30 | |
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31 | /******************************************************************************/ |
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32 | /* */ |
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33 | /* setjmp(), longjmp() */ |
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34 | /* */ |
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35 | /******************************************************************************/ |
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36 | .file "setjmp.as" |
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37 | .text |
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38 | /* .link_pix */ |
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39 | |
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40 | .align 4 |
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41 | .globl _setjmp |
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42 | _setjmp: |
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43 | flushreg |
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44 | andnot 0xf,pfp,g1 /* get pfp, mask out return status bits */ |
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45 | st g1, 0x58(g0) /* save fp of caller*/ |
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46 | /* save globals not killed by the calling convention */ |
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47 | stq g8, 0x40(g0) /* save g8-g11*/ |
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48 | st g12, 0x50(g0) /* save g12*/ |
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49 | st g14, 0x54(g0) /* save g14*/ |
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50 | /* save previous frame local registers */ |
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51 | ldq (g1), g4 /* get previous frame pfp, sp, rip, r3 */ |
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52 | stq g4, (g0) /* save pfp, sp, rip, r3 */ |
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53 | ldq 0x10(g1), g4 /* get previous frame r4-r7 */ |
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54 | stq g4, 0x10(g0) /* save r4-r7 */ |
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55 | ldq 0x20(g1), g4 /* get previous frame r8-r11 */ |
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56 | stq g4, 0x20(g0) /* save r8-r11 */ |
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57 | ldq 0x30(g1), g4 /* get previous frame r12-r15 */ |
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58 | stq g4, 0x30(g0) /* save r12-r15 */ |
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59 | |
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60 | mov 0, g0 /* return 0 */ |
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61 | ret |
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62 | |
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63 | /* |
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64 | * fake a return to the place that called the corresponding _setjmp |
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65 | */ |
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66 | .align 4 |
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67 | .globl _longjmp |
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68 | _longjmp: |
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69 | call 0f /* ensure there is at least one stack frame */ |
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70 | |
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71 | 0: |
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72 | flushreg /* do this before swapping stack */ |
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73 | ld 0x58(g0), pfp /* get fp of caller of setjmp */ |
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74 | /* restore local registers |
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75 | * the following code modifies the frame of the function which originally |
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76 | * called setjmp. |
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77 | */ |
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78 | ldq (g0), g4 /* get pfp, sp, rip, r3 */ |
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79 | stq g4, (pfp) /* restore pfp, sp, rip, r3 */ |
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80 | ldq 0x10(g0), g4 /* get r4-r7 */ |
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81 | stq g4, 0x10(pfp) /* restore r4-r7 */ |
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82 | ldq 0x20(g0), g4 /* get r8-r11 */ |
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83 | stq g4, 0x20(pfp) /* restore r8-r11 */ |
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84 | ldq 0x30(g0), g4 /* get r12-r15 */ |
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85 | stq g4, 0x30(pfp) /* restore r12-r15 */ |
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86 | /* restore global registers */ |
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87 | ldq 0x40(g0), g8 /* get old g8-g11 values */ |
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88 | ld 0x50(g0), g12 /* get old g12 value */ |
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89 | ld 0x54(g0), g14 /* get old g14 value */ |
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90 | |
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91 | mov g1, g0 /* get return value */ |
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92 | cmpo g0, 0 /* make sure it is not zero */ |
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93 | bne 0f |
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94 | mov 1, g0 /* return 1 by default */ |
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95 | 0: |
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96 | ret /* return to caller of _setjmp */ |
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