e83f7ba2c9
. file- and functionality-compatible with previous situation
(FreeBSD csu) (with a crt1.o -> crt0.o symlink in /usr/lib)
. harmonizes source with netbsd
. harmonizes linker invocation (e.g. clang) with netbsd
. helpful to get some arm code in there for the arm port project
80 lines
2.8 KiB
ArmAsm
80 lines
2.8 KiB
ArmAsm
/* $NetBSD: rtld_start.S,v 1.9 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 Klaus Klein 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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.text
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.align 4
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.globl .rtld_start
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.type .rtld_start,@function
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.rtld_start:
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subql #8,%sp | storage for obj and cleanup
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lea (%pc,_GLOBAL_OFFSET_TABLE_@GOTPC),%a0
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lea (%pc,_DYNAMIC),%a1
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movel %a1,%a5
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subl (%a0),%a5
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movel %a5,-(%sp) | relocbase
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movel %a1,-(%sp) | &_DYNAMIC
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jbsr _rtld_relocate_nonplt_self@PLTPC
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addql #8,%sp | pop arguments
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movel %a5,-(%sp) | relocbase
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pea 4(%sp) | sp
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jbsr _rtld@PLTPC | entry = _rtld(sp, relocbase)
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addql #8,%sp | pop arguments
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moveal (%sp)+,%a1 | cleanup
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moveal (%sp)+,%a0 | obj
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moveal %d0,%a3
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jmp (%a3) | Go for it!
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.size .rtld_start,.-.rtld_start
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.align 4
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.globl _rtld_bind_start
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.type _rtld_bind_start,@function
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_rtld_bind_start:
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moveml %d0-%d1/%a0-%a1,-(%sp) | preserve caller-saved registers
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movel 20(%sp),-(%sp) | push reloff
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movel (16+4)(%sp),-(%sp) | push obj
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jbsr _rtld_bind@PLTPC | %a0 = _rtld_bind(obj, reloff)
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addql #8,%sp | pop args
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#ifdef __SVR4_ABI__
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movel %a0,(16+4)(%sp) | write fake `return' address over obj
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#else
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movel %d0,(16+4)(%sp) | write fake `return' address over obj
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#endif
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moveml (%sp)+,%d0-%d1/%a0-%a1 | restore caller-saved registers
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addql #4,%sp | skip reloff
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rts | `return' right into function
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.size _rtld_bind_start,.-_rtld_bind_start
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