projects / thirdparty / gcc.git / blame
| Commit | Line | Data |
|---|---|---|
| 8d9254fc | 1 | # Copyright (C) 2001-2020 Free Software Foundation, Inc. |
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2 | # Written By Nick Clifton |
| 3 | # | |
| 4 | # This file is free software; you can redistribute it and/or modify it | |
| 5 | # under the terms of the GNU General Public License as published by the | |
| 748086b7 | 6 | # Free Software Foundation; either version 3, or (at your option) any |
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7 | # later version. |
| 8 | # | |
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9 | # This file is distributed in the hope that it will be useful, but |
| 10 | # WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 11 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 12 | # General Public License for more details. | |
| 13 | # | |
| 748086b7 JJ |
14 | # Under Section 7 of GPL version 3, you are granted additional |
| 15 | # permissions described in the GCC Runtime Library Exception, version | |
| 16 | # 3.1, as published by the Free Software Foundation. | |
| be393ecf | 17 | # |
| 748086b7 JJ |
18 | # You should have received a copy of the GNU General Public License and |
| 19 | # a copy of the GCC Runtime Library Exception along with this program; | |
| 20 | # see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
| 21 | # <http://www.gnu.org/licenses/>. | |
| be393ecf | 22 | |
| 978e411f CD |
23 | /* An executable stack is *not* required for these functions. */ |
| 24 | #if defined(__ELF__) && defined(__linux__) | |
| 25 | .section .note.GNU-stack,"",%progbits | |
| 26 | .previous | |
| 27 | #endif | |
| 28 | ||
| 6f0668cf RE |
29 | #ifdef __ARM_EABI__ |
| 30 | /* Some attributes that are common to all routines in this file. */ | |
| 31 | /* Tag_ABI_align_needed: This code does not require 8-byte | |
| 32 | alignment from the caller. */ | |
| 33 | /* .eabi_attribute 24, 0 -- default setting. */ | |
| 34 | /* Tag_ABI_align_preserved: This code preserves 8-byte | |
| 35 | alignment in any callee. */ | |
| 36 | .eabi_attribute 25, 1 | |
| 37 | #endif /* __ARM_EABI__ */ | |
| 38 | ||
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39 | # This file just makes sure that the .fini and .init sections do in |
| 40 | # fact return. Users may put any desired instructions in those sections. | |
| 41 | # This file is the last thing linked into any executable. | |
| 42 | ||
| 43aa4e05 | 43 | # Note - this macro is complemented by the FUNC_START macro |
| 5f73c6cc | 44 | # in crti.S. If you change this macro you must also change |
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45 | # that macro match. |
| 46 | # | |
| 72ac76be | 47 | # Note - we do not try any fancy optimizations of the return |
| be393ecf | 48 | # sequences here, it is just not worth it. Instead keep things |
| d47657bd | 49 | # simple. Restore all the save registers, including the link |
| be393ecf | 50 | # register and then perform the correct function return instruction. |
| 82c732f9 | 51 | # We also save/restore r3 to ensure stack alignment. |
| be393ecf NC |
52 | .macro FUNC_END |
| 53 | #ifdef __thumb__ | |
| 54 | .thumb | |
| 55 | ||
| 82c732f9 | 56 | pop {r3, r4, r5, r6, r7} |
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57 | pop {r3} |
| 58 | mov lr, r3 | |
| 59 | #else | |
| 60 | .arm | |
| 61 | ||
| 82c732f9 PB |
62 | sub sp, fp, #40 |
| 63 | ldmfd sp, {r4, r5, r6, r7, r8, r9, sl, fp, sp, lr} | |
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64 | #endif |
| 65 | ||
| 66 | #if defined __THUMB_INTERWORK__ || defined __thumb__ | |
| 67 | bx lr | |
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68 | #else |
| 69 | mov pc, lr | |
| 70 | #endif | |
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71 | .endm |
| 72 | ||
| 73 | ||
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74 | .section ".init" |
| 75 | ;; | |
| 76 | FUNC_END | |
| 77 | ||
| 78 | .section ".fini" | |
| 79 | ;; | |
| 80 | FUNC_END | |
| 81 | ||
| 5f73c6cc | 82 | # end of crtn.S |