129 lines
3.4 KiB
ArmAsm
129 lines
3.4 KiB
ArmAsm
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/*
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* Copyright (C) 2012 The Android Open Source Project
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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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* * 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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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <machine/asm.h>
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#if (_MIPS_SIM == _ABIO32) || (_MIPS_SIM == _ABI32)
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#define ELF_DYNSZ 8
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#define ELF_DYN_TAG 0
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#define ELF_DYN_VAL 4
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#define GOTENT_SZ 4
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#else
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#define ELF_DYNSZ 16
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#define ELF_DYN_TAG 0
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#define ELF_DYN_VAL 8
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#define GOTENT_SZ 8
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#endif
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.text
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.align 4
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.type __start,@function
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.ent __start
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.globl __start
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__start:
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.set noreorder
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bal 1f
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nop
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1:
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#if (_MIPS_SIM == _ABIO32) || (_MIPS_SIM == _ABI32)
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.cpload ra
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#else
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.cpsetup ra, $0, 1b
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#endif
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.set reorder
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/* Discover the load address */
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LA t0, 1b
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PTR_SUBU t0, ra, t0
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#define DT_PLTGOT 3
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#define DT_MIPS_LOCAL_GOTNO 0x7000000a
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/* Search dynamic table for DT_MIPS_LOCAL_GOTNO and DT_PLTGOT values */
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LA t1, _DYNAMIC
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PTR_ADDU t1, t0
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LI t3, DT_PLTGOT
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LI ta0, DT_MIPS_LOCAL_GOTNO
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0:
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REG_L t2, ELF_DYN_TAG(t1)
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beqz t2, .Lrelocate_local_got
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bne t2, t3, 1f /* DT_PLTGOT? */
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REG_L s0, ELF_DYN_VAL(t1)
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PTR_ADDU s0, t0
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b 2f
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1:
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bne t2, ta0, 2f /* DT_MIPS_LOCAL_GOTNO? */
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REG_L s1, ELF_DYN_VAL(t1)
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2: PTR_ADDU t1, ELF_DYNSZ
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b 0b
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.Lrelocate_local_got:
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/*
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* Relocate the local GOT entries
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* got[0] is address of lazy resolver function
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* got[1] may be used for a GNU extension
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*/
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PTR_ADDU s0, GOTENT_SZ
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SUBU s1, 1
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PTR_L t1, (s0)
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bgez t1, 9f
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PTR_ADDU s0, GOTENT_SZ
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SUBU s1, 1
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b 9f
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1: PTR_L t1, (s0)
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PTR_ADDU t1, t0
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PTR_S t1, (s0)
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PTR_ADDU s0, GOTENT_SZ
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9: SUBU s1, 1
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bgez s1, 1b
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/* call linker_init */
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move a0, sp
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#if (_MIPS_SIM == _ABIO32) || (_MIPS_SIM == _ABI32)
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PTR_SUBU sp, 4*REGSZ /* space for arg saves in linker_init */
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#endif
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jal __linker_init
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#if (_MIPS_SIM == _ABIO32) || (_MIPS_SIM == _ABI32)
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PTR_ADDU sp, 4*REGSZ /* restore sp */
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#endif
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move t9, v0
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j t9
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.end __start
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/* FIXME:Is this still needed? */
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.section .ctors, "wa"
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.globl __CTOR_LIST__
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__CTOR_LIST__:
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.long -1
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