mirror of
https://github.com/autc04/Retro68.git
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141 lines
3.0 KiB
ArmAsm
141 lines
3.0 KiB
ArmAsm
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# Define _init and _fini entry points for C-SKY.
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# Copyright (C) 2018-2019 Free Software Foundation, Inc.
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# Contributed by C-SKY Microsystems and Mentor Graphics.
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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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# This file just makes 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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.file "crti.S"
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/* We use more complicated versions of this code with GLIBC. */
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#if defined(__gnu_linux__)
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#ifndef PREINIT_FUNCTION
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# define PREINIT_FUNCTION __gmon_start__
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#endif
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#ifndef PREINIT_FUNCTION_WEAK
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# define PREINIT_FUNCTION_WEAK 1
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#endif
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#if PREINIT_FUNCTION_WEAK
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.global PREINIT_FUNCTION
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.weak PREINIT_FUNCTION
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.align 4
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.type call_weak_fn, %function
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call_weak_fn:
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// push lr
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subi sp, 4
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stw lr, (sp)
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#ifdef __PIC__
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lrw a2, PREINIT_FUNCTION@GOT
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addu a2, gb
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ldw a2, (a2)
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#else
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lrw a2, PREINIT_FUNCTION
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#endif
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cmpnei a2, 0
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bf 1f
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jsr a2
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1:
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// pop lr
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ldw lr, (sp)
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addi sp, 4
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rts
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.align 4
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#else
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.hidden PREINIT_FUNCTION
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#endif /* PREINIT_FUNCTION_WEAK */
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.section .init,"ax",@progbits
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.align 4
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.globl _init
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.type _init, @function
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_init:
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subi sp, 8
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stw lr, (sp, 0)
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#ifdef __PIC__
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// stw gb, (sp, 4)
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bsr .Lgetpc
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.Lgetpc:
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lrw gb, .Lgetpc@GOTPC
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add gb, lr
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#endif
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#if PREINIT_FUNCTION_WEAK
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#ifdef __PIC__
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lrw a2, call_weak_fn@GOTOFF
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add a2, gb
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jsr a2
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#else
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jsri call_weak_fn
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#endif
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#else /* !PREINIT_FUNCTION_WEAK */
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#ifdef __PIC__
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lrw a2, PREINIT_FUNCTION@PLT
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addu a2, gb
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ldw a2, (a2)
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jsr a2
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#else
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jsri PREINIT_FUNCTION
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#endif
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#endif /* PREINIT_FUNCTION_WEAK */
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br 2f
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.literals
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.align 4
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2:
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.section .fini,"ax",@progbits
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.align 4
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.globl _fini
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.type _fini, @function
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_fini:
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subi sp,8
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stw lr, (sp, 0)
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br 2f
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.literals
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.align 4
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2:
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/* These are the non-GLIBC versions. */
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#else /* !defined(__gnu_linux__) */
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.section ".init"
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.global _init
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.type _init,@function
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.align 2
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_init:
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subi sp, 16
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st.w lr, (sp, 12)
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mov r0, r0
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.section ".fini"
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.global _fini
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.type _fini,@function
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.align 2
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_fini:
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subi sp, 16
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st.w lr, (sp, 12)
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mov r0, r0
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#endif /* defined(__gnu_linux__) */
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