c79eac4c4c
NetBSD ld code except for local changes for dlopen() and friends and the hashing on the minor value of the shlibs. We should be binary compatible now with all their libraries. Obtained from: NetBSD
94 lines
3.1 KiB
ArmAsm
94 lines
3.1 KiB
ArmAsm
/*
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* Copyright (c) 1993 Paul Kranenburg
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* All rights reserved.
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Paul Kranenburg.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $Id: mdprologue.S,v 1.7 1994/12/04 07:42:44 mycroft Exp $
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*/
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/*
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* i386 run-time link editor entry points.
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*/
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#include <sys/syscall.h>
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.text
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.globl _binder, _binder_entry
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/*
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* _rtl(int version, struct crt_ldso *crtp)
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*/
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_rtl: # crt0 calls us here
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pushl %ebp # Allocate stack frame
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movl %esp,%ebp
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pushl %ebx
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call 1f # PIC function prologue
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1:
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popl %ebx
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addl $_GLOBAL_OFFSET_TABLE_+[.-1b],%ebx
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movl 12(%ebp),%eax # Extract data from interface structure
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movl (%eax),%eax # base address of ld.so (first field)
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# setup arguments for rtld()
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movl (%ebx),%ecx # 1st entry in GOT is our __DYNAMIC
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addl %eax,%ecx # add load address
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pushl %ecx # 3rd arg
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pushl 12(%ebp) # 2nd arg == &crt.
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pushl 8(%ebp) # 1st arg == version
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addl _rtld@GOT(%ebx),%eax # relocate address of function
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call %eax # _rtld(version, crtp, DYNAMIC)
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addl $12,%esp # pop arguments
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popl %ebx
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leave # remove stack frame
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ret
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# First call to a procedure generally comes through here for
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# binding.
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_binder_entry:
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pushl %ebp # setup a stack frame
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movl %esp,%ebp
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pusha # save all regs
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xorl %eax,%eax # clear
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movl 4(%ebp),%esi # return address in PLT
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movw (%esi),%ax # get hold of relocation number
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subl $6,%esi # make it point to the jmpslot
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pushl %eax # pushd arguments
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pushl %esi #
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call _binder@PLT # _binder(rpc, index)
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addl $8,%esp # pop arguments
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movl %eax,4(%ebp) # return value from _binder() == actual
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# address of function
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popa # restore regs
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leave # remove our stack frame
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ret
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