75 lines
2.8 KiB
ArmAsm
75 lines
2.8 KiB
ArmAsm
/*
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* Copyright (c) 1994 Matthias Pfaller
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* All rights reserved.
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Paul Mackerras.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $Id: mdprologue.S,v 1.1 1994/04/07 19:44:50 pk Exp $
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*/
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/*
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* Run-time link editor entry points for ns32k architecture.
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*/
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.text
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.globl _rtld_entry, _binder_entry, _binder
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/*
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* _rtld_entry(int version, struct crt_ldso *crtp)
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*/
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_rtl_entry:
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enter [],0
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sprd sb,tos
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addr __GLOBAL_OFFSET_TABLE_(pc),r0
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lprd sb,r0 /* PIC function prologue */
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movd 12(fp),r0 /* -> crt_ldso structure */
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movd 0(r0),r1 /* base address */
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/* 1st entry in GOT */
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/* + ld.so base address */
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addr 0(0(sb))[r1:b],tos /* gives address of __DYNAMIC */
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movd r0,tos /* crt_ldso pointer */
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movd 8(fp),tos /* version */
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jsr 0(_rtld(sb))[r1:b] /* call _rtld function */
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lprd sb,-4(fp)
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exit []
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ret 0
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/*
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* First call to a procedure generally comes through here for
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* binding.
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*/
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_binder_entry:
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movd tos,r1 /* grab return address (within PLT) */
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movd r0,tos /* save r0 (that's for cerror) */
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movzwd 0(r1),tos /* get function index */
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addr -6(r1),tos /* point to PLT slot */
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bsr _binder /* relocate function address */
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movd r0,tos /* prepare for jump */
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movd 12(sp),r0 /* restore r0 */
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ret 12 /* jump into function */
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