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/* $NetBSD: crtbegin.S,v 1.7 2014/03/16 11:41:30 joerg Exp $ */
/*-
* Copyright (c) 2013 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Matt Thomas of 3am Software Foundry.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <vax/asm.h>
RCSID("$NetBSD: crtbegin.S,v 1.7 2014/03/16 11:41:30 joerg Exp $")
.section .ctors, "aw", @progbits
.p2align 2
__CTOR_LIST__: /* symbol is not used */
.long -1
.section .dtors, "aw", @progbits
.p2align 2
__DTOR_LIST__:
.long -1
.section .eh_frame, "a", @progbits
.p2align 2
__EH_FRAME_LIST__:
.section .jcr, "aw", @progbits
.p2align 2
__JCR_LIST__:
.section .data.rel, "aw", @progbits
.p2align 2
.type __dso_handle, @object
.size __dso_handle, 4
.globl __dso_handle
.hidden __dso_handle
__dso_handle:
#ifdef SHARED
.long __dso_handle
#else
.long 0
#endif
.local __dwarf_eh_object
.comm __dwarf_eh_object,32
.local __initialized
.comm __initialized,1
.local __finished
.comm __finished,1
.text
/*
* All variables are local to this DSO so we can skip using GOT references
* and instead use PCREL references to access them. We do this regardless
* of being PIC since it isn't any additional overhead to do so.
*
* We don't setup a TOC since all of ours calls are indirect so it isn't
* needed.
*/
.hidden __do_global_dtors_aux
_ENTRY(__do_global_dtors_aux, 0x0100) /* save r8 */
tstb __finished /* done this already? */
bneq 4f
movb $1, __finished /* mark it as done */
#ifdef SHARED
/*
* if (__cxa_finalize)
* __cxa_finalize(&__dso_handle);
*/
movab __cxa_finalize, %r0
beql 1f
pushal __dso_handle
calls $0, (%r0)
1:
#endif /* SHARED */
/*
* We use load with postincrement to advance the pointer along.
* We know the list ends with 0. If we load one, we must be done.
*/
moval __DTOR_LIST__+4, %r8 /* skip first entry */
2: movl (%r8)+, %r0 /* r0 = *r8++; */
beql 3f
calls $0, (%r0)
brb 2b
3:
#ifdef SHARED
/*
* if (__deregister_frame_info)
* __deregister_frame_info(&__EH_FRAME_LIST__[0]);
*/
moval __deregister_frame_info, %r0
beql 4f
pushal __EH_FRAME_LIST__
calls $0, (%r0)
#endif /* SHARED */
4: ret
END(__do_global_dtors_aux)
.weak __deregister_frame_info
.weak __cxa_finalize
.weak __register_frame_info
.weak _Jv_RegisterClasses
.hidden __do_global_ctors_aux
_ENTRY(__do_global_ctors_aux, 0x0800)
tstb __initialized
bneq 4f
movb $1, __initialized
/*
* if (__register_frame_info)
* __register_frame_info(&__EH_FRAME_LIST__[0], &__dwarf_eh_object)
*/
movab __register_frame_info, %r0
beql 1f
pushal __dwarf_eh_object
pushal __EH_FRAME_LIST__
calls $0, (%r0)
1:
/*
* if (_Jv_RegisterClasses && __JCR_LIST__[0])
* _Jv_RegisterClasses(&__JCR_LIST__[0]);
*/
movab _Jv_RegisterClasses, %r0
beql 2f
pushal __JCR_LIST__
calls $0, (%r0)
2:
/*
* Get the end of the CTOR list. The first entry is -1 so if we
* load a negative address, we know we are done.
*/
moval __CTOR_LIST_END__, %r8 /* get end of list */
3: movl -(%r8), %r0 /* get function pointer with predec */
blss 4f /* negative? done. */
calls $0, (%r0) /* call it */
brb 3b /* get next one */
4: ret
END(__do_global_ctors_aux)
.hidden _C_LABEL(__CTOR_LIST_END__)
.section .init, "ax", @progbits
calls $0, __do_global_ctors_aux
.section .fini, "ax", @progbits
calls $0, __do_global_dtors_aux
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