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/* * $OpenBSD: mdprologue.S,v 1.2 1998/03/26 19:47:38 niklas Exp $*/
/*
* Copyright (c) 1993 Paul Kranenburg
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Paul Kranenburg.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
/*
* SPARC run-time link editor entry points.
*/
#define CRT_VERSION_SUN 1
.seg "text" ! [internal]
.proc 16
.global _rtld_entry
_rtld_entry:
!#PROLOGUE# 0
save %sp,-96,%sp
L.1B:
call L.2B
sethi %hi((__GLOBAL_OFFSET_TABLE_-(L.1B-.))),%l7
L.2B:
!#PROLOGUE# 1
or %l7,%lo((__GLOBAL_OFFSET_TABLE_-(L.1B-.))),%l7
add %l7,%o7,%l7
cmp %i0, CRT_VERSION_SUN ! is crtp passed in Sun style,
bne 1f ! ie. relative to stack frame ?
nop
add %i1, %fp, %i1 ! if so, adjust to absolute address
1:
ld [%i1], %o3 ! load base address (crtp->crt_ba)
ld [%l7], %o2 ! get __DYNAMIC address
! from 1st GOT entry
add %o2, %o3, %o2 ! relocate and make it 3rd arg.
ld [%l7 + _rtld], %g1 ! get address of rtld()
add %g1, %o3, %g1 ! relocate
mov %i1, %o1 ! set up args, #2: crtp
call %g1 ! rtld(version, crtp, dp)
mov %i0, %o0 ! arg #1: version
mov %o0, %i0 ! pass on rtld() return value
ret
restore
.seg "data" ! [internal]
.seg "text"
.global _binder_entry
_binder_entry:
!#PROLOGUE# 0
save %sp,-96,%sp
!L.1C:
! call L.2C
! sethi %hi((__GLOBAL_OFFSET_TABLE_-(L.1C-.))),%l7
!L.2C:
! or %l7,%lo((__GLOBAL_OFFSET_TABLE_-(L.1C-.))),%l7
!#PROLOGUE# 1
sub %i7, 4, %o0 ! get to jmpslot through pc
ld [%i7+4], %o1 ! get relocation index
sethi %hi(0x3fffff), %o2 ! -> reloc_index & 0x003fffff
or %o2, %lo(0x3fffff), %o2 ! [internal]
call _binder ! and call binder(jsp, reloc_index)
and %o1, %o2, %o1
mov %o0, %g1 ! return value == function address
restore ! get rid of our context
jmp %g1 ! and go.
restore ! and the jmpslot context
nop
.seg "data" ! [internal]
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