projects / thirdparty / gcc.git / blame
| Commit | Line | Data |
|---|---|---|
| a945c346 | 1 | /* Copyright (C) 2012-2024 Free Software Foundation, Inc. |
| e430824f CLT |
2 | Contributed by Jonah Graham (jgraham@altera.com). |
| 3 | Contributed by Mentor Graphics, Inc. | |
| 4 | ||
| 5 | This file is free software; you can redistribute it and/or modify it | |
| 6 | under the terms of the GNU General Public License as published by the | |
| 7 | Free Software Foundation; either version 3, or (at your option) any | |
| 8 | later version. | |
| 9 | ||
| 10 | This file is distributed in the hope that it will be useful, but | |
| 11 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 13 | General Public License for more details. | |
| 14 | ||
| 15 | Under Section 7 of GPL version 3, you are granted additional | |
| 16 | permissions described in the GCC Runtime Library Exception, version | |
| 17 | 3.1, as published by the Free Software Foundation. | |
| 18 | ||
| 19 | You should have received a copy of the GNU General Public License and | |
| 20 | a copy of the GCC Runtime Library Exception along with this program; | |
| 21 | see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
| 22 | <http://www.gnu.org/licenses/>. */ | |
| 23 | ||
| 24 | ||
| 25 | /* This file just make a stack frame for the contents of the .fini and | |
| 26 | .init sections. Users may put any desired instructions in those | |
| 27 | sections. | |
| 28 | ||
| 29 | While technically any code can be put in the init and fini sections | |
| 30 | most stuff will not work other than stuff which obeys the call frame | |
| 31 | and ABI. All the call-preserved registers are saved, the call clobbered | |
| 32 | registers should have been saved by the code calling init and fini. | |
| 33 | ||
| 34 | See crtstuff.c for an example of code that inserts itself in the init | |
| 35 | and fini sections. | |
| 36 | ||
| 37 | See crt0.s for the code that calls init and fini. */ | |
| 38 | ||
| e430824f CLT |
39 | .section ".init" |
| 40 | .align 2 | |
| 41 | .global _init | |
| 42 | _init: | |
| 43 | addi sp, sp, -48 | |
| 44 | stw ra, 44(sp) | |
| 45 | stw r23, 40(sp) | |
| 46 | stw r22, 36(sp) | |
| 47 | stw r21, 32(sp) | |
| 48 | stw r20, 28(sp) | |
| 49 | stw r19, 24(sp) | |
| 50 | stw r18, 20(sp) | |
| 51 | stw r17, 16(sp) | |
| 52 | stw r16, 12(sp) | |
| 53 | stw fp, 8(sp) | |
| 54 | addi fp, sp, 8 | |
| 55 | #ifdef linux | |
| 56 | nextpc r22 | |
| 02b67731 SL |
57 | 1: movhi r2, %hiadj(_gp_got - 1b) |
| 58 | addi r2, r2, %lo(_gp_got - 1b) | |
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59 | add r22, r22, r2 |
| 60 | #endif | |
| 61 | ||
| 62 | ||
| 63 | .section ".fini" | |
| 64 | .align 2 | |
| 65 | .global _fini | |
| 66 | _fini: | |
| 67 | addi sp, sp, -48 | |
| 68 | stw ra, 44(sp) | |
| 69 | stw r23, 40(sp) | |
| 70 | stw r22, 36(sp) | |
| 71 | stw r21, 32(sp) | |
| 72 | stw r20, 28(sp) | |
| 73 | stw r19, 24(sp) | |
| 74 | stw r18, 20(sp) | |
| 75 | stw r17, 16(sp) | |
| 76 | stw r16, 12(sp) | |
| 77 | stw fp, 8(sp) | |
| 78 | addi fp, sp, 8 | |
| 79 | #ifdef linux | |
| 80 | nextpc r22 | |
| 02b67731 SL |
81 | 1: movhi r2, %hiadj(_gp_got - 1b) |
| 82 | addi r2, r2, %lo(_gp_got - 1b) | |
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83 | add r22, r22, r2 |
| 84 | #endif | |
| 85 |