1/* Copyright (C) 2012-2022 Free Software Foundation, Inc. 2 Contributed by Jonah Graham (jgraham@altera.com). 3 Contributed by Mentor Graphics, Inc. 4 5This file is free software; you can redistribute it and/or modify it 6under the terms of the GNU General Public License as published by the 7Free Software Foundation; either version 3, or (at your option) any 8later version. 9 10This file is distributed in the hope that it will be useful, but 11WITHOUT ANY WARRANTY; without even the implied warranty of 12MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13General Public License for more details. 14 15Under Section 7 of GPL version 3, you are granted additional 16permissions described in the GCC Runtime Library Exception, version 173.1, as published by the Free Software Foundation. 18 19You should have received a copy of the GNU General Public License and 20a copy of the GCC Runtime Library Exception along with this program; 21see 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 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 571: movhi r2, %hiadj(_gp_got - 1b) 58 addi r2, r2, %lo(_gp_got - 1b) 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 811: movhi r2, %hiadj(_gp_got - 1b) 82 addi r2, r2, %lo(_gp_got - 1b) 83 add r22, r22, r2 84#endif 85 86