1/* $NetBSD: rtld_start.S,v 1.6 2002/09/12 17:18:39 mycroft Exp $ */ 2 3/*- 4 * Copyright (c) 1999, 2002 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Klaus Klein and by Charles M. Hannum. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39#include <machine/asm.h> 40 41 .text 42 .align 4 43 .globl .rtld_start 44 .type .rtld_start,@function 45.rtld_start: 46 subql #8,%sp | storage for obj and cleanup 47 48 lea (%pc,_GLOBAL_OFFSET_TABLE_@GOTPC),%a5 49 movel _GLOBAL_OFFSET_TABLE_@GOT.w(%a5),%d0 50 movel _DYNAMIC@GOT.w(%a5),%d1 51 subl %d0,%a5 52 53 movel %a5,-(%sp) | relocbase 54 addl %a5,%d1 55 movel %d1,-(%sp) | &_DYNAMIC 56 jbsr _rtld_relocate_nonplt_self@PLTPC 57 addql #8,%sp | pop arguments 58 59 movel %a5,-(%sp) | relocbase 60 pea 4(%sp) | sp 61 jbsr _rtld@PLTPC | entry = _rtld(sp, relocbase) 62 addql #8,%sp | pop arguments 63 64 moveal (%sp)+,%a1 | cleanup 65 moveal (%sp)+,%a0 | obj 66 moveal %d0,%a3 67 jmp (%a3) | Go for it! 68 .size .rtld_start,.-.rtld_start 69 70 .align 4 71 .globl _rtld_bind_start 72 .type _rtld_bind_start,@function 73_rtld_bind_start: 74 moveml %d0-%d1/%a0-%a1,-(%sp) | preserve caller-saved registers 75 movel 20(%sp),-(%sp) | push reloff 76 movel (16+4)(%sp),-(%sp) | push obj 77 jbsr _rtld_bind@PLTPC | %a0 = _rtld_bind(obj, reloff) 78 addql #8,%sp | pop args 79#ifdef __SVR4_ABI__ 80 movel %a0,(16+4)(%sp) | write fake `return' address over obj 81#else 82 movel %d0,(16+4)(%sp) | write fake `return' address over obj 83#endif 84 moveml (%sp)+,%d0-%d1/%a0-%a1 | restore caller-saved registers 85 addql #4,%sp | skip reloff 86 rts | `return' right into function 87 .size _rtld_bind_start,.-_rtld_bind_start 88