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/*
* Copyright (c) 1993 Paul Mackerras
* 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 Paul Mackerras.
* 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.
*
* $Id: mdprologue.S,v 1.1 1995/10/18 08:40:57 deraadt Exp $
*/
/*
* Run-time link editor entry points for m68k architecture.
*/
.globl _rtl
_rtl:
link a6,#0
movel a5,sp@-
movel a6@(12),a0 | -> crt_ldso structure
movel a0@,a1 | base address
movel #__GLOBAL_OFFSET_TABLE_,a5 | PIC function prologue
lea pc@(0,a5:l),a5
movel a5@,d0 | 1st entry in GOT
addl a1,d0 | add ld.so base address
movel d0,sp@- | gives address of __DYNAMIC
movel a0,sp@- | crt_ldso pointer
movel a6@(8),sp@- | version
addl a5@(_rtld:w),a1 | relocate _rtld function
jsr a1@ | call it
| movel #0x80000004,d0 | CC_EXTPURGE | CC_IPURGE
| trap #12 | cachectl
movel a6@(-4),a5
unlk a6
rts
.globl _binder_entry
_binder_entry:
movml a0-a1/d0-d1,sp@- | preserve scratch registers
movl sp@(16),a0 | grab return address (within PLT)
moveq #0,d0
movw a0@,d0 | get function index
movel d0,sp@-
subql #6,a0 | point to PLT slot
movel a0,sp@-
jbsr _binder | relocate function address
addql #8,sp
movel d0,sp@(16) | put function address on stack
| movel #0x80000004,d0 | CC_EXTPURGE | CC_IPURGE
| trap #12 | cachectl
movml sp@+,a0-a1/d0-d1 | restore scratch registers
rts | jump into function (via address on stack)
.globl __cachectl
__cachectl:
movel sp@(4),a1 | address
movel sp@(8),d1 | length
movel #0x80000004,d0 | function = CC_EXTPURGE | CC_IPURGE
trap #12 | cachectl "syscall"
rts
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