minix/libexec/ld.elf_so/arch/m68k/rtld_start.S

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/* $NetBSD: rtld_start.S,v 1.9 2008/04/28 20:23:03 martin Exp $ */
/*-
* Copyright (c) 1999, 2002, 2003 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Klaus Klein and by Charles M. Hannum.
*
* 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 <machine/asm.h>
.text
.align 4
.globl .rtld_start
.type .rtld_start,@function
.rtld_start:
subql #8,%sp | storage for obj and cleanup
lea (%pc,_GLOBAL_OFFSET_TABLE_@GOTPC),%a0
lea (%pc,_DYNAMIC),%a1
movel %a1,%a5
subl (%a0),%a5
movel %a5,-(%sp) | relocbase
movel %a1,-(%sp) | &_DYNAMIC
jbsr _rtld_relocate_nonplt_self@PLTPC
addql #8,%sp | pop arguments
movel %a5,-(%sp) | relocbase
pea 4(%sp) | sp
jbsr _rtld@PLTPC | entry = _rtld(sp, relocbase)
addql #8,%sp | pop arguments
moveal (%sp)+,%a1 | cleanup
moveal (%sp)+,%a0 | obj
moveal %d0,%a3
jmp (%a3) | Go for it!
.size .rtld_start,.-.rtld_start
.align 4
.globl _rtld_bind_start
.type _rtld_bind_start,@function
_rtld_bind_start:
moveml %d0-%d1/%a0-%a1,-(%sp) | preserve caller-saved registers
movel 20(%sp),-(%sp) | push reloff
movel (16+4)(%sp),-(%sp) | push obj
jbsr _rtld_bind@PLTPC | %a0 = _rtld_bind(obj, reloff)
addql #8,%sp | pop args
#ifdef __SVR4_ABI__
movel %a0,(16+4)(%sp) | write fake `return' address over obj
#else
movel %d0,(16+4)(%sp) | write fake `return' address over obj
#endif
moveml (%sp)+,%d0-%d1/%a0-%a1 | restore caller-saved registers
addql #4,%sp | skip reloff
rts | `return' right into function
.size _rtld_bind_start,.-_rtld_bind_start