106 lines
3.0 KiB
ArmAsm
106 lines
3.0 KiB
ArmAsm
/* $NetBSD: rtld_start.S,v 1.9 2002/10/05 11:59:05 mycroft Exp $ */
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/*
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* Copyright 1997 Michael L. Hitch <mhitch@montana.edu>
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* Portions copyright 2002 Charles M. Hannum <root@ihack.net>
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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. 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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#include <mips/asm.h>
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.globl _C_LABEL(_rtld_relocate_nonplt_self)
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.globl _C_LABEL(_rtld)
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LEAF(rtld_start)
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.set noreorder
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.cpload t9
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addu sp, sp, -12 # adjust stack pointer
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.cprestore 0 # -> 0(sp) for gp
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# -> 4(sp) for atexit
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# -> 8(sp) for obj_main
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move s0,a0 # save stack pointer from a0
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move s1,a3 # save ps_strings pointer
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la a1, 1f
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bal 1f
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la t9,_C_LABEL(_rtld_relocate_nonplt_self)
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1: subu a1, ra, a1 # relocbase
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move s2,a1
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la a0,_DYNAMIC
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addu t9, a1, t9
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jalr t9
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addu a0, a1, a0 # &_DYNAMIC
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move a1,s2 # relocbase
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addu a0, sp, 4 # sp
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jal _C_LABEL(_rtld) # v0 = _rtld(sp, relocbase)
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nop
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lw a1, 4(sp) # our atexit function
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lw a2, 8(sp) # obj_main entry
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addu sp, sp,12 # readjust stack
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move a0,s0 # stack pointer
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move t9,v0
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jr t9 # _start(sp, cleanup, obj);
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move a3,s1 # restore ps_strings
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END(rtld_start)
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.globl _rtld_bind_start
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.ent _rtld_bind_start
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_rtld_bind_start:
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move v1,gp # save old GP
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add t9,8 # modify T9 to point at .cpload
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.cpload t9
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subu sp,44 # save arguments and sp value in stack
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.cprestore 36
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sw t7,40(sp)
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sw a0,16(sp)
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sw a1,20(sp)
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sw a2,24(sp)
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sw a3,28(sp)
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sw s0,32(sp)
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move s0,sp
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move a0,t8 # symbol index
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move a1,t7 # old RA
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move a2,v1 # old GP
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move a3,ra # current RA
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jal _C_LABEL(_rtld_bind)
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nop
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move sp,s0
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lw ra,40(sp)
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lw a0,16(sp)
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lw a1,20(sp)
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lw a2,24(sp)
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lw a3,28(sp)
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lw s0,32(sp)
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addu sp,44
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move t9,v0
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jr t9
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nop
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.end _rtld_bind_start
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