rtld_start.S revision 1.11
11.11Sriastrad/* $NetBSD: rtld_start.S,v 1.11 2014/03/18 18:20:38 riastradh Exp $ */ 21.1Skleink 31.1Skleink/*- 41.8Smycroft * Copyright (c) 1999, 2002, 2003 The NetBSD Foundation, Inc. 51.1Skleink * All rights reserved. 61.1Skleink * 71.1Skleink * This code is derived from software contributed to The NetBSD Foundation 81.6Smycroft * by Klaus Klein and by Charles M. Hannum. 91.1Skleink * 101.1Skleink * Redistribution and use in source and binary forms, with or without 111.1Skleink * modification, are permitted provided that the following conditions 121.1Skleink * are met: 131.1Skleink * 1. Redistributions of source code must retain the above copyright 141.1Skleink * notice, this list of conditions and the following disclaimer. 151.1Skleink * 2. Redistributions in binary form must reproduce the above copyright 161.1Skleink * notice, this list of conditions and the following disclaimer in the 171.1Skleink * documentation and/or other materials provided with the distribution. 181.1Skleink * 191.1Skleink * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 201.1Skleink * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 211.1Skleink * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 221.1Skleink * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 231.1Skleink * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 241.1Skleink * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 251.1Skleink * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 261.1Skleink * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 271.1Skleink * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 281.1Skleink * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 291.1Skleink * POSSIBILITY OF SUCH DAMAGE. 301.1Skleink */ 311.1Skleink 321.1Skleink#include <machine/asm.h> 331.1Skleink 341.1Skleink .text 351.2Skleink .align 4 361.1Skleink .globl .rtld_start 371.1Skleink .type .rtld_start,@function 381.1Skleink.rtld_start: 391.1Skleink subql #8,%sp | storage for obj and cleanup 401.4Smycroft 411.10Smatt GOT_SETUP(%a0) 421.10Smatt LEA_LCL(_DYNAMIC,%a1) 431.10Smatt 441.7Smycroft movel %a1,%a5 451.7Smycroft subl (%a0),%a5 461.5Smycroft 471.5Smycroft movel %a5,-(%sp) | relocbase 481.7Smycroft movel %a1,-(%sp) | &_DYNAMIC 491.4Smycroft jbsr _rtld_relocate_nonplt_self@PLTPC 501.4Smycroft addql #8,%sp | pop arguments 511.4Smycroft 521.5Smycroft movel %a5,-(%sp) | relocbase 531.5Smycroft pea 4(%sp) | sp 541.5Smycroft jbsr _rtld@PLTPC | entry = _rtld(sp, relocbase) 551.5Smycroft addql #8,%sp | pop arguments 561.4Smycroft 571.1Skleink moveal (%sp)+,%a1 | cleanup 581.1Skleink moveal (%sp)+,%a0 | obj 591.1Skleink moveal %d0,%a3 601.1Skleink jmp (%a3) | Go for it! 611.1Skleink .size .rtld_start,.-.rtld_start 621.1Skleink 631.2Skleink .align 4 641.1Skleink .globl _rtld_bind_start 651.1Skleink .type _rtld_bind_start,@function 661.1Skleink_rtld_bind_start: 671.10Smatt INTERRUPT_SAVEREG 681.1Skleink movel 20(%sp),-(%sp) | push reloff 691.1Skleink movel (16+4)(%sp),-(%sp) | push obj 701.1Skleink jbsr _rtld_bind@PLTPC | %a0 = _rtld_bind(obj, reloff) 711.1Skleink addql #8,%sp | pop args 721.3Sitohy#ifdef __SVR4_ABI__ 731.1Skleink movel %a0,(16+4)(%sp) | write fake `return' address over obj 741.3Sitohy#else 751.3Sitohy movel %d0,(16+4)(%sp) | write fake `return' address over obj 761.3Sitohy#endif 771.10Smatt INTERRUPT_RESTOREREG | restore caller-saved registers 781.1Skleink addql #4,%sp | skip reloff 791.1Skleink rts | `return' right into function 801.1Skleink .size _rtld_bind_start,.-_rtld_bind_start 81