forked from Imagelibrary/rtems
82 lines
2.4 KiB
ArmAsm
82 lines
2.4 KiB
ArmAsm
/* SPDX-License-Identifier: BSD-2-Clause */
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/*
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* Copyright (c) 2017 embedded brains GmbH & Co. KG
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/* rtems_crti.S */
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#include <rtems/asm.h>
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#include <rtems/score/cpu.h>
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#if defined(__powerpc64__)
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.section ".init","ax"
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.align 2
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.globl _init
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.type _init,@function
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_init:
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mflr r0
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std r0,16(1)
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stdu r1,-96(1)
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.section ".fini","ax"
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.align 2
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.globl _fini
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.type _fini,@function
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_fini:
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mflr r0
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std r0,16(r1)
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stdu r1,-96(r1)
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#else
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/* terminate the __init() function and create
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* a new head '_init' for use by RTEMS to
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* invoke C++ global constructors
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* NOTE: it is essential that this snippet
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* is hooked between ecrti and crtbegin
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*
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* ecrti has the following .init section:
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* __init:
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* stwu r1,-16(r1)
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* mflr r0
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* stw r0,20(r1)
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*
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* The reason for this is that we want to call
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* __eabi() at an early stage but prevent __eabi()
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* from branching to __init (C++ exception init
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* and global CTORs). Hence we make __init a no-op
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* and create a new entry point:
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*/
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.section ".init","ax"
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.align 2
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lwz r0,r20(r1)
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mtlr r0
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addi r1,r1,16
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blr
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.globl _init
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.type _init,@function
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_init:
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stwu r1,-16(r1)
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mflr r0
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stw r0,20(r1)
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#endif
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