54 lines
1.6 KiB
ArmAsm
54 lines
1.6 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0+ OR BSD-2-Clause */
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/*
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* Copyright (C) 2014 Linaro Ltd. <ard.biesheuvel@linaro.org>
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* Copyright (C) 2018 Alexander Graf <agraf@suse.de>
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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 and this list of conditions, without modification.
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* 2. 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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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License as published by the Free Software Foundation;
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* either version 2 of the License, or (at your option) any later version.
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*/
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.text
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.globl _start
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.type _start,%function
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_start:
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addi sp, sp, -24
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sd a0, 0(sp)
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sd a1, 8(sp)
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sd ra, 16(sp)
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lla a0, ImageBase
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lla a1, _DYNAMIC
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call _relocate
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bne a0, zero, 0f
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ld a1, 8(sp)
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ld a0, 0(sp)
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call _entry
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ld ra, 16(sp)
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0: addi sp, sp, 24
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ret
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// hand-craft a dummy .reloc section so EFI knows it's a relocatable executable:
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.data
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dummy: .4byte 0
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#define IMAGE_REL_ABSOLUTE 0
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.section .reloc, "a"
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label1:
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.4byte dummy-label1 // Page RVA
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.4byte 12 // Block Size (2*4+2*2), must be aligned by 32 Bits
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.2byte (IMAGE_REL_ABSOLUTE<<12) + 0 // reloc for dummy
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.2byte (IMAGE_REL_ABSOLUTE<<12) + 0 // reloc for dummy
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#if defined(__ELF__) && defined(__linux__)
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.section .note.GNU-stack,"",%progbits
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#endif
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