102 lines
3.2 KiB
ArmAsm
102 lines
3.2 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 withough 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 1.1 1993/10/16 21:54:36 pk Exp $
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*/
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/*
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* SPARC run-time link editor entry points.
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*/
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#define CRT_VERSION_SUN 1
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.seg "text" ! [internal]
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.proc 16
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.global _rtld_entry
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_rtld_entry:
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!#PROLOGUE# 0
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save %sp,-96,%sp
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L.1B:
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call L.2B
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sethi %hi((__GLOBAL_OFFSET_TABLE_-(L.1B-.))),%l7
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L.2B:
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!#PROLOGUE# 1
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or %l7,%lo((__GLOBAL_OFFSET_TABLE_-(L.1B-.))),%l7
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add %l7,%o7,%l7
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cmp %i0, CRT_VERSION_SUN ! is crtp passed in Sun style,
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bne 1f ! ie. relative to stack frame ?
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nop
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add %i1, %fp, %i1 ! if so, adjust to absolute address
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1:
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ld [%i1], %o3 ! load base address (crtp->crt_ba)
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ld [%l7], %o2 ! get rtld's __DYNAMIC address
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! from 1st GOT entry
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add %o2, %o3, %o2 ! relocate and make it 3rd arg.
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ld [%l7 + _rtld], %g1 ! get address of rtld()
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add %g1, %o3, %g1 ! relocate
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mov %i1, %o1 ! set up args, #2: crtp
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call %g1 ! rtld(version, crtp, dp)
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mov %i0, %o0 ! arg #1: version
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ret
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restore
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.seg "data" ! [internal]
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.seg "text"
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.global _binder_entry
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_binder_entry:
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!#PROLOGUE# 0
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save %sp,-96,%sp
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!L.1C:
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! call L.2C
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! sethi %hi((__GLOBAL_OFFSET_TABLE_-(L.1C-.))),%l7
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!L.2C:
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! or %l7,%lo((__GLOBAL_OFFSET_TABLE_-(L.1C-.))),%l7
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!#PROLOGUE# 1
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sub %i7, 4, %o0 ! get to jmpslot through pc
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ld [%i7+4], %o1 ! get relocation index
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sethi %hi(0x3fffff), %o2 ! -> reloc_index & 0x003fffff
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or %o2, %lo(0x3fffff), %o2 ! [internal]
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call _binder ! and call binder(jsp, reloc_index)
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and %o1, %o2, %o1
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mov %o0, %g1 ! return value == function address
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restore ! get rid of our context
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jmp %g1 ! and go.
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restore ! and the jmpslot's
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nop
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.seg "data" ! [internal]
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