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RISC-V: Add PE/COFF header for EFI stub

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Linux kernel Image can appear as an EFI application With appropriate
PE/COFF header fields in the beginning of the Image header. An EFI
application loader can directly load a Linux kernel Image and an EFI
stub residing in kernel can boot Linux kernel directly.

Add the necessary PE/COFF header.

Signed-off-by: Atish Patra <atish.patra@wdc.com>
Link: https://lore.kernel.org/r/20200421033336.9663-3-atish.patra@wdc.com
[ardb: - use C prefix for c.li to ensure the expected opcode is emitted
       - align all image sections according to PE/COFF section alignment ]
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Anup Patel <anup@brainfault.org>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
This commit is contained in:
Atish Patra 2020-09-17 15:37:13 -07:00 • committed by Palmer Dabbelt
parent e8dcb61f2a
commit cb7d2dd561
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5 changed files with 212 additions and 2 deletions
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13
arch/riscv/include/asm/sections.h Normal file
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@ -0,0 +1,13 @@
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (C) 2020 Western Digital Corporation or its affiliates.
*/
#ifndef __ASM_SECTIONS_H
#define __ASM_SECTIONS_H
#include <asm-generic/sections.h>
extern char _start[];
extern char _start_kernel[];
#endif /* __ASM_SECTIONS_H */