NetBSD/libexec/ld.elf_so/mips/rtld_start.S

90 lines
2.7 KiB
ArmAsm

/* $NetBSD: rtld_start.S,v 1.2 1998/04/09 04:45:08 mhitch Exp $ */
/*
* Copyright 1997 Michael L. Hitch <mhitch@montana.edu>
* 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. 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.
*/
#include <machine/regdef.h>
#include <mips/asm.h>
LEAF(rtld_start)
.set noreorder
.cpload t9
addu sp, sp, -12 # adjust stack pointer
.cprestore 0 # 0(sp) for gp
# 4(sp) for atexit
# 8(sp) for obj_main
move s0,a0 # save stack pointer from a0
addu a0, sp, 4 # _rtld argument
move s1,a3 # save ps_strings pointer
jal _C_LABEL(_rtld) # v0 = _rtld(sp)
nop # [BD if jal not expanded]
lw a1, 4(sp) # our atexit function
lw a2, 8(sp) # obj_main entry
addu sp, sp,12 # readjust stack
move a0,s0 # stack pointer
move t9,v0
jr t9 # _start(sp, cleanup, obj);
move a3,s1 # restore ps_strings
END(rtld_start)
.globl _rtld_bind_start
.ent _rtld_bind_start
_rtld_bind_start:
move v1,gp # save old GP
add t9,8 # modify T9 to point at .cpload
.cpload t9
subu sp,40 # save arguments and sp value in stack
.cprestore 32
sw t7,36(sp)
sw a0,12(sp)
sw a1,16(sp)
sw a2,20(sp)
sw a3,24(sp)
sw s0,28(sp)
move s0,sp
move a0,t8 # symbol index
move a1,t7 # old RA
move a2,v1 # old GP
move a3,ra # current RA
jal _C_LABEL(_rtld_bind_mips)
nop
move sp,s0
lw ra,36(sp)
lw a0,12(sp)
lw a1,16(sp)
lw a2,20(sp)
lw a3,24(sp)
lw s0,28(sp)
addu sp,40
move t9,v0
jr t9
nop
.end _rtld_bind_start