87 lines
2.4 KiB
ArmAsm
87 lines
2.4 KiB
ArmAsm
# Copyright (C) 2001-2019 Free Software Foundation, Inc.
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# Written By Nick Clifton
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#
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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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#
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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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#
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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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#
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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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/* An executable stack is *not* required for these functions. */
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#if defined(__ELF__) && defined(__linux__)
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.section .note.GNU-stack,"",%progbits
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.previous
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#endif
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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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#ifdef __ELF__
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#define TYPE(x) .type x,function
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#else
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#define TYPE(x)
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#endif
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#ifdef __ARM_EABI__
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/* Some attributes that are common to all routines in this file. */
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/* Tag_ABI_align_needed: This code does not require 8-byte
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alignment from the caller. */
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/* .eabi_attribute 24, 0 -- default setting. */
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/* Tag_ABI_align_preserved: This code preserves 8-byte
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alignment in any callee. */
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.eabi_attribute 25, 1
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#endif /* __ARM_EABI__ */
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# Note - this macro is complemented by the FUNC_END macro
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# in crtn.S. If you change this macro you must also change
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# that macro match.
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.macro FUNC_START
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#ifdef __thumb__
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.thumb
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push {r3, r4, r5, r6, r7, lr}
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#else
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.arm
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# Create a stack frame and save any call-preserved registers
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mov ip, sp
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stmdb sp!, {r3, r4, r5, r6, r7, r8, r9, sl, fp, ip, lr, pc}
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sub fp, ip, #4
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#endif
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.endm
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.section ".init"
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.align 2
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.global _init
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#ifdef __thumb__
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.thumb_func
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#endif
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TYPE(_init)
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_init:
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FUNC_START
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.section ".fini"
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.align 2
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.global _fini
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#ifdef __thumb__
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.thumb_func
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#endif
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TYPE(_fini)
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_fini:
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FUNC_START
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# end of crti.S
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