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/* * $OpenBSD: mdprologue.S,v 1.2 1998/03/26 19:47:17 niklas Exp $*/
/*
* Copyright (c) 1994 Matthias Pfaller.
* All rights reserved.
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Matthias Pfaller.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*
*/
/*
* Run-time link editor entry points for ns32k architecture.
*/
.text
.globl _rtld_entry, _binder_entry, _binder
/*
* _rtld_entry(int version, struct crt_ldso *crtp)
*/
_rtl_entry:
enter [],0
sprd sb,tos
addr __GLOBAL_OFFSET_TABLE_(pc),r0
lprd sb,r0 /* PIC function prologue */
movd 12(fp),r0 /* -> crt_ldso structure */
movd 0(r0),r1 /* base address */
/* 1st entry in GOT */
/* + ld.so base address */
addr 0(0(sb))[r1:b],tos /* gives address of __DYNAMIC */
movd r0,tos /* crt_ldso pointer */
movd 8(fp),tos /* version */
jsr 0(_rtld(sb))[r1:b] /* call _rtld function */
lprd sb,-4(fp)
exit []
ret 0
/*
* First call to a procedure generally comes through here for
* binding.
*/
_binder_entry:
movd tos,r1 /* grab return address (within PLT) */
movd r0,tos /* save r0 (for cerror) */
movzwd 0(r1),tos /* get function index */
addr -6(r1),tos /* point to PLT slot */
bsr _binder /* relocate function address */
movd r0,tos /* prepare for jump */
movd 12(sp),r0 /* restore r0 */
ret 12 /* jump into function */
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