gnu-efi/gnuefi/crt0-efi-riscv64.S

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/* SPDX-License-Identifier: GPL-2.0+ OR BSD-2-Clause */
/*
* Copyright (C) 2014 Linaro Ltd. <ard.biesheuvel@linaro.org>
* Copyright (C) 2018 Alexander Graf <agraf@suse.de>
*
* 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 and this list of conditions, without modification.
* 2. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License as published by the Free Software Foundation;
* either version 2 of the License, or (at your option) any later version.
*/
.text
.globl _start
.type _start,%function
_start:
addi sp, sp, -24
sd a0, 0(sp)
sd a1, 8(sp)
sd ra, 16(sp)
lla a0, ImageBase
lla a1, _DYNAMIC
call _relocate
bne a0, zero, 0f
ld a1, 8(sp)
ld a0, 0(sp)
call _entry
ld ra, 16(sp)
0: addi sp, sp, 24
ret
// hand-craft a dummy .reloc section so EFI knows it's a relocatable executable:
.data
dummy: .4byte 0
#define IMAGE_REL_ABSOLUTE 0
.section .reloc, "a"
label1:
.4byte dummy-label1 // Page RVA
.4byte 12 // Block Size (2*4+2*2), must be aligned by 32 Bits
.2byte (IMAGE_REL_ABSOLUTE<<12) + 0 // reloc for dummy
.2byte (IMAGE_REL_ABSOLUTE<<12) + 0 // reloc for dummy
#if defined(__ELF__) && defined(__linux__)
.section .note.GNU-stack,"",%progbits
#endif