1/* $NetBSD: rtld_start.S,v 1.9 2008/04/28 20:23:03 martin Exp $ */ 2 3/*- 4 * Copyright (c) 1999, 2002, 2003 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32#include <machine/asm.h> 33 34 .text 35 .align 4 36 .globl .rtld_start 37 .type .rtld_start,@function 38.rtld_start: 39 subql #8,%sp | storage for obj and cleanup 40 41 lea (%pc,_GLOBAL_OFFSET_TABLE_@GOTPC),%a0 42 lea (%pc,_DYNAMIC),%a1 43 movel %a1,%a5 44 subl (%a0),%a5 45 46 movel %a5,-(%sp) | relocbase 47 movel %a1,-(%sp) | &_DYNAMIC 48 jbsr _rtld_relocate_nonplt_self@PLTPC 49 addql #8,%sp | pop arguments 50 51 movel %a5,-(%sp) | relocbase 52 pea 4(%sp) | sp 53 jbsr _rtld@PLTPC | entry = _rtld(sp, relocbase) 54 addql #8,%sp | pop arguments 55 56 moveal (%sp)+,%a1 | cleanup 57 moveal (%sp)+,%a0 | obj 58 moveal %d0,%a3 59 jmp (%a3) | Go for it! 60 .size .rtld_start,.-.rtld_start 61 62 .align 4 63 .globl _rtld_bind_start 64 .type _rtld_bind_start,@function 65_rtld_bind_start: 66 moveml %d0-%d1/%a0-%a1,-(%sp) | preserve caller-saved registers 67 movel 20(%sp),-(%sp) | push reloff 68 movel (16+4)(%sp),-(%sp) | push obj 69 jbsr _rtld_bind@PLTPC | %a0 = _rtld_bind(obj, reloff) 70 addql #8,%sp | pop args 71#ifdef __SVR4_ABI__ 72 movel %a0,(16+4)(%sp) | write fake `return' address over obj 73#else 74 movel %d0,(16+4)(%sp) | write fake `return' address over obj 75#endif 76 moveml (%sp)+,%d0-%d1/%a0-%a1 | restore caller-saved registers 77 addql #4,%sp | skip reloff 78 rts | `return' right into function 79 .size _rtld_bind_start,.-_rtld_bind_start 80