82 lines
2.9 KiB
ArmAsm
82 lines
2.9 KiB
ArmAsm
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/* $NetBSD: rtld_start.S,v 1.16 2008/04/28 20:23:03 martin Exp $ */
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/*-
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* Copyright (c) 1999, 2002, 2003 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Christos Zoulas, Paul Kranenburg, and by Charles M. Hannum.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <machine/asm.h>
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.section ".text"
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.align 4
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.global _rtld_start
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.type _rtld_start,@function
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_rtld_start:
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mov 0, %fp /* Erect a fence post for ourselves */
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mov %g1, %l1 /* save ps_strings */
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sub %sp, 32+8, %sp /* room for return args and save area */
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sethi %hi(_GLOBAL_OFFSET_TABLE_-4), %l7
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call 0f
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add %l7, %lo(_GLOBAL_OFFSET_TABLE_+4), %l7
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call _DYNAMIC+8
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0: add %l7, %o7, %l7 /* real &_GLOBAL_OFFSET_TABLE_ */
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ld [%o7+8], %o0 /* load stub call instruction */
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ld [%l7], %l0 /* base-relative &_DYNAMIC */
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sll %o0, 2, %o0 /* extract PC offset */
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add %o0, %o7, %o0 /* real &_DYNAMIC */
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sub %o0, %l0, %l0 /* relocbase */
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call _rtld_relocate_nonplt_self
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mov %l0, %o1 /* relocbase */
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mov %l0, %o1 /* relocbase */
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call _rtld
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add %sp, 96, %o0 /* &argc - 8 */
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ld [%sp + 96], %g3 /* arg: cleanup */
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ld [%sp + 96 + 4], %g2 /* arg: obj */
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add %sp, 32+8, %sp /* restore stack pointer */
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jmp %o0
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mov %l1, %g1 /* restore ps_strings */
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.section ".text"
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.align 4
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.global _rtld_bind_start
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.type _rtld_bind_start,@function
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_rtld_bind_start: # (obj, reloff)
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ld [%o7 + 8], %o0 /* obj id is in second PLT slot */
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srl %g1, 10, %o1 /* offset is in high 22 bits */
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call _rtld_bind /* Call _rtld_bind(obj, offset) */
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sub %o1, 12*4, %o1 /* first 4 `pltrel' entries missing! */
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jmp %o0 /* return value == function address */
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restore
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