86 lines
2.5 KiB
ArmAsm
86 lines
2.5 KiB
ArmAsm
; crt0-efi-x86_64.S - x86_64 EFI startup code.
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; Copyright (C) 1999 Hewlett-Packard Co.
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; Contributed by David Mosberger <davidm@hpl.hp.com>.
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; Copyright (C) 2005 Intel Co.
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; Contributed by Fenghua Yu <fenghua.yu@intel.com>.
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;
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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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;
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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
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; copyright notice, this list of conditions and the following
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; disclaimer in the documentation and/or other materials
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; provided with the distribution.
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; * Neither the name of Hewlett-Packard Co. nor the names of its
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; contributors may be used to endorse or promote products derived
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; from this software without specific prior written permission.
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;
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; THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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; CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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; INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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; MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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; DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
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; BE LIABLE FOR ANYDIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
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; OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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; PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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; PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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; THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
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; TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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; 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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; 2018-05-05 Converted to NASM syntax by Justin C. Miller
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extern ImageBase
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extern _DYNAMIC
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extern _relocate
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extern efi_main
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section .text
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align 4
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global _start
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_start:
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sub rsp, 8
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push rcx
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push rdx
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; These are already in RDI/RSI from EFI calling us, right? -justin
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;lea rdi, [ImageBase]
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;lea rsi, [_DYNAMIC]
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pop rcx
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pop rdx
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push rcx
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push rdx
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call _relocate
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pop rdi
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pop rsi
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call efi_main
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add rsp, 8
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.exit:
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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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section .data
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dummy:
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dd 0
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%define IMAGE_REL_ABSOLUTE 0
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section .reloc
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label1:
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dd 0 ; Page RVA
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dd 10 ; Block Size (2*4+2)
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dw (IMAGE_REL_ABSOLUTE<<12) + 0 ; reloc for dummy
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