88 lines
2.4 KiB
ArmAsm
88 lines
2.4 KiB
ArmAsm
/* Copyright (C) 2012-2014 Free Software Foundation, Inc.
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Contributed by Jonah Graham (jgraham@altera.com).
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Contributed by Mentor Graphics, Inc.
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This file is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation; either version 3, or (at your option) any
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later version.
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This file is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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/* This file just make a stack frame for the contents of the .fini and
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.init sections. Users may put any desired instructions in those
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sections.
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While technically any code can be put in the init and fini sections
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most stuff will not work other than stuff which obeys the call frame
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and ABI. All the call-preserved registers are saved, the call clobbered
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registers should have been saved by the code calling init and fini.
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See crtstuff.c for an example of code that inserts itself in the init
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and fini sections.
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See crt0.s for the code that calls init and fini. */
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.file "crti.asm"
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.section ".init"
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.align 2
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.global _init
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_init:
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addi sp, sp, -48
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stw ra, 44(sp)
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stw r23, 40(sp)
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stw r22, 36(sp)
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stw r21, 32(sp)
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stw r20, 28(sp)
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stw r19, 24(sp)
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stw r18, 20(sp)
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stw r17, 16(sp)
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stw r16, 12(sp)
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stw fp, 8(sp)
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addi fp, sp, 8
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#ifdef linux
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nextpc r22
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1: movhi r2, %hiadj(_GLOBAL_OFFSET_TABLE_ - 1b)
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addi r2, r2, %lo(_GLOBAL_OFFSET_TABLE_ - 1b)
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add r22, r22, r2
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#endif
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.section ".fini"
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.align 2
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.global _fini
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_fini:
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addi sp, sp, -48
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stw ra, 44(sp)
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stw r23, 40(sp)
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stw r22, 36(sp)
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stw r21, 32(sp)
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stw r20, 28(sp)
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stw r19, 24(sp)
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stw r18, 20(sp)
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stw r17, 16(sp)
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stw r16, 12(sp)
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stw fp, 8(sp)
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addi fp, sp, 8
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#ifdef linux
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nextpc r22
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1: movhi r2, %hiadj(_GLOBAL_OFFSET_TABLE_ - 1b)
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addi r2, r2, %lo(_GLOBAL_OFFSET_TABLE_ - 1b)
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add r22, r22, r2
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#endif
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