cb7d2dd561
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>
52 lines
1.5 KiB
C
52 lines
1.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2020 Western Digital Corporation or its affiliates.
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* Linker script variables to be set after section resolution, as
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* ld.lld does not like variables assigned before SECTIONS is processed.
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* Based on arch/arm64/kerne/image-vars.h
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*/
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#ifndef __RISCV_KERNEL_IMAGE_VARS_H
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#define __RISCV_KERNEL_IMAGE_VARS_H
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#ifndef LINKER_SCRIPT
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#error This file should only be included in vmlinux.lds.S
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#endif
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#ifdef CONFIG_EFI
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/*
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* The EFI stub has its own symbol namespace prefixed by __efistub_, to
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* isolate it from the kernel proper. The following symbols are legally
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* accessed by the stub, so provide some aliases to make them accessible.
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* Only include data symbols here, or text symbols of functions that are
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* guaranteed to be safe when executed at another offset than they were
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* linked at. The routines below are all implemented in assembler in a
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* position independent manner
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*/
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__efistub_memcmp = memcmp;
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__efistub_memchr = memchr;
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__efistub_memcpy = memcpy;
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__efistub_memmove = memmove;
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__efistub_memset = memset;
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__efistub_strlen = strlen;
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__efistub_strnlen = strnlen;
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__efistub_strcmp = strcmp;
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__efistub_strncmp = strncmp;
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__efistub_strrchr = strrchr;
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#ifdef CONFIG_KASAN
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__efistub___memcpy = memcpy;
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__efistub___memmove = memmove;
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__efistub___memset = memset;
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#endif
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__efistub__start = _start;
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__efistub__start_kernel = _start_kernel;
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__efistub__end = _end;
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__efistub__edata = _edata;
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__efistub_screen_info = screen_info;
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#endif
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#endif /* __RISCV_KERNEL_IMAGE_VARS_H */
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