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linux/arch/arm64/kernel/efi-header.S

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arm64: efi: move EFI header and related data to a separate .S file In preparation of yet another round of modifications to the PE/COFF header, macroize it and move the definition into a separate source file. Acked-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2017-03-23 19:00:46 +00:00
/*
* Copyright (C) 2013 - 2017 Linaro, Ltd.
* Copyright (C) 2013, 2014 Red Hat, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
arm64: efi: replace open coded constants with symbolic ones Replace open coded constants with symbolic ones throughout the Image and the EFI headers. No binary level changes are intended. Acked-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2017-03-23 19:00:50 +00:00
#include <linux/pe.h>
#include <linux/sizes.h>
arm64: efi: move EFI header and related data to a separate .S file In preparation of yet another round of modifications to the PE/COFF header, macroize it and move the definition into a separate source file. Acked-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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.macro __EFI_PE_HEADER
arm64: efi: replace open coded constants with symbolic ones Replace open coded constants with symbolic ones throughout the Image and the EFI headers. No binary level changes are intended. Acked-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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.long PE_MAGIC
arm64: efi: move EFI header and related data to a separate .S file In preparation of yet another round of modifications to the PE/COFF header, macroize it and move the definition into a separate source file. Acked-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2017-03-23 19:00:46 +00:00
coff_header:
arm64: efi: replace open coded constants with symbolic ones Replace open coded constants with symbolic ones throughout the Image and the EFI headers. No binary level changes are intended. Acked-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2017-03-23 19:00:50 +00:00
.short IMAGE_FILE_MACHINE_ARM64 // Machine
.short section_count // NumberOfSections
arm64: efi: move EFI header and related data to a separate .S file In preparation of yet another round of modifications to the PE/COFF header, macroize it and move the definition into a separate source file. Acked-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2017-03-23 19:00:46 +00:00
.long 0 // TimeDateStamp
.long 0 // PointerToSymbolTable
arm64: efi: remove forbidden values from the PE/COFF header Bring the PE/COFF header in line with the PE/COFF spec, by setting NumberOfSymbols to 0, and removing the section alignment flags. Acked-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2017-03-23 19:00:48 +00:00
.long 0 // NumberOfSymbols
arm64: efi: move EFI header and related data to a separate .S file In preparation of yet another round of modifications to the PE/COFF header, macroize it and move the definition into a separate source file. Acked-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2017-03-23 19:00:46 +00:00
.short section_table - optional_header // SizeOfOptionalHeader
arm64: efi: replace open coded constants with symbolic ones Replace open coded constants with symbolic ones throughout the Image and the EFI headers. No binary level changes are intended. Acked-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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.short IMAGE_FILE_DEBUG_STRIPPED | \
IMAGE_FILE_EXECUTABLE_IMAGE | \
IMAGE_FILE_LINE_NUMS_STRIPPED // Characteristics
arm64: efi: move EFI header and related data to a separate .S file In preparation of yet another round of modifications to the PE/COFF header, macroize it and move the definition into a separate source file. Acked-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2017-03-23 19:00:46 +00:00
optional_header:
arm64: efi: replace open coded constants with symbolic ones Replace open coded constants with symbolic ones throughout the Image and the EFI headers. No binary level changes are intended. Acked-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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.short PE_OPT_MAGIC_PE32PLUS // PE32+ format
arm64: efi: move EFI header and related data to a separate .S file In preparation of yet another round of modifications to the PE/COFF header, macroize it and move the definition into a separate source file. Acked-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2017-03-23 19:00:46 +00:00
.byte 0x02 // MajorLinkerVersion
.byte 0x14 // MinorLinkerVersion
arm64: efi: split Image code and data into separate PE/COFF sections To prevent unintended modifications to the kernel text (malicious or otherwise) while running the EFI stub, describe the kernel image as two separate sections: a .text section with read-execute permissions, covering .text, .rodata and .init.text, and a .data section with read-write permissions, covering .init.data, .data and .bss. This relies on the firmware to actually take the section permission flags into account, but this is something that is currently being implemented in EDK2, which means we will likely start seeing it in the wild between one and two years from now. Acked-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2017-03-23 19:00:51 +00:00
.long __initdata_begin - efi_header_end // SizeOfCode
.long __pecoff_data_size // SizeOfInitializedData
arm64: efi: move EFI header and related data to a separate .S file In preparation of yet another round of modifications to the PE/COFF header, macroize it and move the definition into a separate source file. Acked-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2017-03-23 19:00:46 +00:00
.long 0 // SizeOfUninitializedData
.long __efistub_entry - _head // AddressOfEntryPoint
.long efi_header_end - _head // BaseOfCode
extra_header_fields:
.quad 0 // ImageBase
arm64: efi: replace open coded constants with symbolic ones Replace open coded constants with symbolic ones throughout the Image and the EFI headers. No binary level changes are intended. Acked-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2017-03-23 19:00:50 +00:00
.long SZ_4K // SectionAlignment
arm64: efi: move EFI header and related data to a separate .S file In preparation of yet another round of modifications to the PE/COFF header, macroize it and move the definition into a separate source file. Acked-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2017-03-23 19:00:46 +00:00
.long PECOFF_FILE_ALIGNMENT // FileAlignment
.short 0 // MajorOperatingSystemVersion
.short 0 // MinorOperatingSystemVersion
.short 0 // MajorImageVersion
.short 0 // MinorImageVersion
.short 0 // MajorSubsystemVersion
.short 0 // MinorSubsystemVersion
.long 0 // Win32VersionValue
.long _end - _head // SizeOfImage
// Everything before the kernel image is considered part of the header
.long efi_header_end - _head // SizeOfHeaders
.long 0 // CheckSum
arm64: efi: replace open coded constants with symbolic ones Replace open coded constants with symbolic ones throughout the Image and the EFI headers. No binary level changes are intended. Acked-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2017-03-23 19:00:50 +00:00
.short IMAGE_SUBSYSTEM_EFI_APPLICATION // Subsystem
arm64: efi: move EFI header and related data to a separate .S file In preparation of yet another round of modifications to the PE/COFF header, macroize it and move the definition into a separate source file. Acked-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2017-03-23 19:00:46 +00:00
.short 0 // DllCharacteristics
.quad 0 // SizeOfStackReserve
.quad 0 // SizeOfStackCommit
.quad 0 // SizeOfHeapReserve
.quad 0 // SizeOfHeapCommit
.long 0 // LoaderFlags
.long (section_table - .) / 8 // NumberOfRvaAndSizes
.quad 0 // ExportTable
.quad 0 // ImportTable
.quad 0 // ResourceTable
.quad 0 // ExceptionTable
.quad 0 // CertificationTable
.quad 0 // BaseRelocationTable
#ifdef CONFIG_DEBUG_EFI
.long efi_debug_table - _head // DebugTable
.long efi_debug_table_size
#endif
// Section table
section_table:
arm64: efi: replace open coded constants with symbolic ones Replace open coded constants with symbolic ones throughout the Image and the EFI headers. No binary level changes are intended. Acked-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2017-03-23 19:00:50 +00:00
.ascii ".text\0\0\0"
arm64: efi: split Image code and data into separate PE/COFF sections To prevent unintended modifications to the kernel text (malicious or otherwise) while running the EFI stub, describe the kernel image as two separate sections: a .text section with read-execute permissions, covering .text, .rodata and .init.text, and a .data section with read-write permissions, covering .init.data, .data and .bss. This relies on the firmware to actually take the section permission flags into account, but this is something that is currently being implemented in EDK2, which means we will likely start seeing it in the wild between one and two years from now. Acked-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2017-03-23 19:00:51 +00:00
.long __initdata_begin - efi_header_end // VirtualSize
arm64: efi: move EFI header and related data to a separate .S file In preparation of yet another round of modifications to the PE/COFF header, macroize it and move the definition into a separate source file. Acked-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2017-03-23 19:00:46 +00:00
.long efi_header_end - _head // VirtualAddress
arm64: efi: split Image code and data into separate PE/COFF sections To prevent unintended modifications to the kernel text (malicious or otherwise) while running the EFI stub, describe the kernel image as two separate sections: a .text section with read-execute permissions, covering .text, .rodata and .init.text, and a .data section with read-write permissions, covering .init.data, .data and .bss. This relies on the firmware to actually take the section permission flags into account, but this is something that is currently being implemented in EDK2, which means we will likely start seeing it in the wild between one and two years from now. Acked-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2017-03-23 19:00:51 +00:00
.long __initdata_begin - efi_header_end // SizeOfRawData
arm64: efi: move EFI header and related data to a separate .S file In preparation of yet another round of modifications to the PE/COFF header, macroize it and move the definition into a separate source file. Acked-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2017-03-23 19:00:46 +00:00
.long efi_header_end - _head // PointerToRawData
.long 0 // PointerToRelocations
.long 0 // PointerToLineNumbers
.short 0 // NumberOfRelocations
.short 0 // NumberOfLineNumbers
arm64: efi: replace open coded constants with symbolic ones Replace open coded constants with symbolic ones throughout the Image and the EFI headers. No binary level changes are intended. Acked-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2017-03-23 19:00:50 +00:00
.long IMAGE_SCN_CNT_CODE | \
arm64: efi: split Image code and data into separate PE/COFF sections To prevent unintended modifications to the kernel text (malicious or otherwise) while running the EFI stub, describe the kernel image as two separate sections: a .text section with read-execute permissions, covering .text, .rodata and .init.text, and a .data section with read-write permissions, covering .init.data, .data and .bss. This relies on the firmware to actually take the section permission flags into account, but this is something that is currently being implemented in EDK2, which means we will likely start seeing it in the wild between one and two years from now. Acked-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2017-03-23 19:00:51 +00:00
IMAGE_SCN_MEM_READ | \
IMAGE_SCN_MEM_EXECUTE // Characteristics
.ascii ".data\0\0\0"
.long __pecoff_data_size // VirtualSize
.long __initdata_begin - _head // VirtualAddress
.long __pecoff_data_rawsize // SizeOfRawData
.long __initdata_begin - _head // PointerToRawData
.long 0 // PointerToRelocations
.long 0 // PointerToLineNumbers
.short 0 // NumberOfRelocations
.short 0 // NumberOfLineNumbers
.long IMAGE_SCN_CNT_INITIALIZED_DATA | \
arm64: efi: replace open coded constants with symbolic ones Replace open coded constants with symbolic ones throughout the Image and the EFI headers. No binary level changes are intended. Acked-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2017-03-23 19:00:50 +00:00
IMAGE_SCN_MEM_READ | \
IMAGE_SCN_MEM_WRITE // Characteristics
.set section_count, (. - section_table) / 40
arm64: efi: move EFI header and related data to a separate .S file In preparation of yet another round of modifications to the PE/COFF header, macroize it and move the definition into a separate source file. Acked-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2017-03-23 19:00:46 +00:00
#ifdef CONFIG_DEBUG_EFI
/*
* The debug table is referenced via its Relative Virtual Address (RVA),
* which is only defined for those parts of the image that are covered
* by a section declaration. Since this header is not covered by any
* section, the debug table must be emitted elsewhere. So stick it in
* the .init.rodata section instead.
*
* Note that the EFI debug entry itself may legally have a zero RVA,
* which means we can simply put it right after the section headers.
*/
__INITRODATA
.align 2
efi_debug_table:
// EFI_IMAGE_DEBUG_DIRECTORY_ENTRY
.long 0 // Characteristics
.long 0 // TimeDateStamp
.short 0 // MajorVersion
.short 0 // MinorVersion
arm64: efi: replace open coded constants with symbolic ones Replace open coded constants with symbolic ones throughout the Image and the EFI headers. No binary level changes are intended. Acked-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2017-03-23 19:00:50 +00:00
.long IMAGE_DEBUG_TYPE_CODEVIEW // Type
arm64: efi: move EFI header and related data to a separate .S file In preparation of yet another round of modifications to the PE/COFF header, macroize it and move the definition into a separate source file. Acked-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2017-03-23 19:00:46 +00:00
.long efi_debug_entry_size // SizeOfData
.long 0 // RVA
.long efi_debug_entry - _head // FileOffset
.set efi_debug_table_size, . - efi_debug_table
.previous
efi_debug_entry:
// EFI_IMAGE_DEBUG_CODEVIEW_NB10_ENTRY
.ascii "NB10" // Signature
.long 0 // Unknown
.long 0 // Unknown2
.long 0 // Unknown3
.asciz VMLINUX_PATH
.set efi_debug_entry_size, . - efi_debug_entry
#endif
/*
* EFI will load .text onwards at the 4k section alignment
* described in the PE/COFF header. To ensure that instruction
* sequences using an adrp and a :lo12: immediate will function
* correctly at this alignment, we must ensure that .text is
* placed at a 4k boundary in the Image to begin with.
*/
.align 12
efi_header_end:
.endm
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