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git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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6e99d3213b
Fix a missing prototype warning by adding a forward declaration for the PE/COFF entrypoint, and while at it, align the function name between the x86 and ARM versions of the stub. Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
131 lines
4.0 KiB
ArmAsm
131 lines
4.0 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2013-2017 Linaro Ltd
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* Authors: Roy Franz <roy.franz@linaro.org>
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* Ard Biesheuvel <ard.biesheuvel@linaro.org>
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*/
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#include <linux/pe.h>
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#include <linux/sizes.h>
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.macro __nop
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#ifdef CONFIG_EFI_STUB
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@ This is almost but not quite a NOP, since it does clobber the
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@ condition flags. But it is the best we can do for EFI, since
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@ PE/COFF expects the magic string "MZ" at offset 0, while the
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@ ARM/Linux boot protocol expects an executable instruction
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@ there.
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.inst MZ_MAGIC | (0x1310 << 16) @ tstne r0, #0x4d000
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#else
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AR_CLASS( mov r0, r0 )
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M_CLASS( nop.w )
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#endif
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.endm
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.macro __EFI_HEADER
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#ifdef CONFIG_EFI_STUB
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.set start_offset, __efi_start - start
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.org start + 0x3c
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@
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@ The PE header can be anywhere in the file, but for
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@ simplicity we keep it together with the MSDOS header
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@ The offset to the PE/COFF header needs to be at offset
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@ 0x3C in the MSDOS header.
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@ The only 2 fields of the MSDOS header that are used are this
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@ PE/COFF offset, and the "MZ" bytes at offset 0x0.
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@
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.long pe_header - start @ Offset to the PE header.
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pe_header:
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.long PE_MAGIC
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coff_header:
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.short IMAGE_FILE_MACHINE_THUMB @ Machine
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.short section_count @ NumberOfSections
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.long 0 @ TimeDateStamp
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.long 0 @ PointerToSymbolTable
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.long 0 @ NumberOfSymbols
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.short section_table - optional_header @ SizeOfOptionalHeader
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.short IMAGE_FILE_32BIT_MACHINE | \
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IMAGE_FILE_DEBUG_STRIPPED | \
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IMAGE_FILE_EXECUTABLE_IMAGE | \
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IMAGE_FILE_LINE_NUMS_STRIPPED @ Characteristics
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#define __pecoff_code_size (__pecoff_data_start - __efi_start)
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optional_header:
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.short PE_OPT_MAGIC_PE32 @ PE32 format
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.byte 0x02 @ MajorLinkerVersion
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.byte 0x14 @ MinorLinkerVersion
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.long __pecoff_code_size @ SizeOfCode
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.long __pecoff_data_size @ SizeOfInitializedData
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.long 0 @ SizeOfUninitializedData
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.long efi_pe_entry - start @ AddressOfEntryPoint
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.long start_offset @ BaseOfCode
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.long __pecoff_data_start - start @ BaseOfData
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extra_header_fields:
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.long 0 @ ImageBase
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.long SZ_4K @ SectionAlignment
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.long SZ_512 @ FileAlignment
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.short 0 @ MajorOsVersion
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.short 0 @ MinorOsVersion
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.short LINUX_EFISTUB_MAJOR_VERSION @ MajorImageVersion
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.short LINUX_EFISTUB_MINOR_VERSION @ MinorImageVersion
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.short 0 @ MajorSubsystemVersion
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.short 0 @ MinorSubsystemVersion
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.long 0 @ Win32VersionValue
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.long __pecoff_end - start @ SizeOfImage
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.long start_offset @ SizeOfHeaders
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.long 0 @ CheckSum
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.short IMAGE_SUBSYSTEM_EFI_APPLICATION @ Subsystem
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.short 0 @ DllCharacteristics
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.long 0 @ SizeOfStackReserve
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.long 0 @ SizeOfStackCommit
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.long 0 @ SizeOfHeapReserve
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.long 0 @ SizeOfHeapCommit
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.long 0 @ LoaderFlags
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.long (section_table - .) / 8 @ NumberOfRvaAndSizes
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.quad 0 @ ExportTable
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.quad 0 @ ImportTable
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.quad 0 @ ResourceTable
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.quad 0 @ ExceptionTable
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.quad 0 @ CertificationTable
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.quad 0 @ BaseRelocationTable
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section_table:
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.ascii ".text\0\0\0"
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.long __pecoff_code_size @ VirtualSize
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.long __efi_start @ VirtualAddress
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.long __pecoff_code_size @ SizeOfRawData
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.long __efi_start @ PointerToRawData
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.long 0 @ PointerToRelocations
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.long 0 @ PointerToLineNumbers
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.short 0 @ NumberOfRelocations
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.short 0 @ NumberOfLineNumbers
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.long IMAGE_SCN_CNT_CODE | \
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IMAGE_SCN_MEM_READ | \
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IMAGE_SCN_MEM_EXECUTE @ Characteristics
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.ascii ".data\0\0\0"
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.long __pecoff_data_size @ VirtualSize
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.long __pecoff_data_start - start @ VirtualAddress
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.long __pecoff_data_rawsize @ SizeOfRawData
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.long __pecoff_data_start - start @ PointerToRawData
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.long 0 @ PointerToRelocations
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.long 0 @ PointerToLineNumbers
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.short 0 @ NumberOfRelocations
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.short 0 @ NumberOfLineNumbers
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.long IMAGE_SCN_CNT_INITIALIZED_DATA | \
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IMAGE_SCN_MEM_READ | \
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IMAGE_SCN_MEM_WRITE @ Characteristics
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.set section_count, (. - section_table) / 40
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.align 12
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__efi_start:
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#endif
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.endm
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