1/* $NetBSD: rtld_start.S,v 1.10 2013/07/18 21:57:42 matt 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 GOT_SETUP(%a0) 42 LEA_LCL(_DYNAMIC,%a1) 43 44 movel %a1,%a5 45 subl (%a0),%a5 46 47 movel %a5,-(%sp) | relocbase 48 movel %a1,-(%sp) | &_DYNAMIC 49 jbsr _rtld_relocate_nonplt_self@PLTPC 50 addql #8,%sp | pop arguments 51 52 movel %a5,-(%sp) | relocbase 53 pea 4(%sp) | sp 54 jbsr _rtld@PLTPC | entry = _rtld(sp, relocbase) 55 addql #8,%sp | pop arguments 56 57 moveal (%sp)+,%a1 | cleanup 58 moveal (%sp)+,%a0 | obj 59 moveal %d0,%a3 60 jmp (%a3) | Go for it! 61 .size .rtld_start,.-.rtld_start 62 63 .align 4 64 .globl _rtld_bind_start 65 .type _rtld_bind_start,@function 66_rtld_bind_start: 67 INTERRUPT_SAVEREG 68 movel 20(%sp),-(%sp) | push reloff 69 movel (16+4)(%sp),-(%sp) | push obj 70 jbsr _rtld_bind@PLTPC | %a0 = _rtld_bind(obj, reloff) 71 addql #8,%sp | pop args 72#ifdef __SVR4_ABI__ 73 movel %a0,(16+4)(%sp) | write fake `return' address over obj 74#else 75 movel %d0,(16+4)(%sp) | write fake `return' address over obj 76#endif 77 INTERRUPT_RESTOREREG | restore caller-saved registers 78 addql #4,%sp | skip reloff 79 rts | `return' right into function 80 .size _rtld_bind_start,.-_rtld_bind_start 81