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1f1ba325a2
In order to be able to switch from LoadImage() [which treats the supplied PE/COFF image as file input only, and reconstructs the memory image based on the section descriptors] to a mode where we allocate the memory directly, and invoke the image in place, we need to now how much memory to allocate beyond the end of the image. So copy this information from the payload's PE/COFF header to the end of the compressed version of the payload, so that the decompressor app can access it before performing the decompression itself. We'll also need to size of the code region once we switch arm64 to jumping to the kernel proper with MMU and caches enabled, so let's capture that information as well. Note that SizeOfCode does not account for the header, so we need SizeOfHeaders as well. Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
144 lines
3.2 KiB
ArmAsm
144 lines
3.2 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0 */
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#include <linux/pe.h>
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#ifdef CONFIG_64BIT
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.set .Lextra_characteristics, 0x0
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.set .Lpe_opt_magic, PE_OPT_MAGIC_PE32PLUS
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#else
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.set .Lextra_characteristics, IMAGE_FILE_32BIT_MACHINE
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.set .Lpe_opt_magic, PE_OPT_MAGIC_PE32
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#endif
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.section ".head", "a"
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.globl __efistub_efi_zboot_header
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__efistub_efi_zboot_header:
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.Ldoshdr:
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.long MZ_MAGIC
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.ascii "zimg" // image type
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.long __efistub__gzdata_start - .Ldoshdr // payload offset
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.long __efistub__gzdata_size - 12 // payload size
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.long 0, 0 // reserved
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.asciz COMP_TYPE // compression type
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.org .Ldoshdr + 0x3c
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.long .Lpehdr - .Ldoshdr // PE header offset
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.Lpehdr:
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.long PE_MAGIC
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.short MACHINE_TYPE
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.short .Lsection_count
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.long 0
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.long 0
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.long 0
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.short .Lsection_table - .Loptional_header
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.short IMAGE_FILE_DEBUG_STRIPPED | \
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IMAGE_FILE_EXECUTABLE_IMAGE | \
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IMAGE_FILE_LINE_NUMS_STRIPPED |\
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.Lextra_characteristics
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.Loptional_header:
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.short .Lpe_opt_magic
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.byte 0, 0
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.long _etext - .Lefi_header_end
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.long __data_size
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.long 0
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.long __efistub_efi_zboot_entry - .Ldoshdr
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.long .Lefi_header_end - .Ldoshdr
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#ifdef CONFIG_64BIT
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.quad 0
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#else
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.long _etext - .Ldoshdr, 0x0
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#endif
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.long 4096
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.long 512
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.short 0, 0
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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, 0
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.long 0
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.long _end - .Ldoshdr
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.long .Lefi_header_end - .Ldoshdr
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.long 0
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.short IMAGE_SUBSYSTEM_EFI_APPLICATION
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.short 0
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#ifdef CONFIG_64BIT
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.quad 0, 0, 0, 0
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#else
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.long 0, 0, 0, 0
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#endif
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.long 0
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.long (.Lsection_table - .) / 8
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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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#ifdef CONFIG_DEBUG_EFI
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.long .Lefi_debug_table - .Ldoshdr // DebugTable
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.long .Lefi_debug_table_size
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#endif
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.Lsection_table:
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.ascii ".text\0\0\0"
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.long _etext - .Lefi_header_end
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.long .Lefi_header_end - .Ldoshdr
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.long _etext - .Lefi_header_end
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.long .Lefi_header_end - .Ldoshdr
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.long 0, 0
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.short 0, 0
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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
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.ascii ".data\0\0\0"
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.long __data_size
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.long _etext - .Ldoshdr
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.long __data_rawsize
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.long _etext - .Ldoshdr
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.long 0, 0
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.short 0, 0
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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
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.set .Lsection_count, (. - .Lsection_table) / 40
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#ifdef CONFIG_DEBUG_EFI
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.section ".rodata", "a"
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.align 2
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.Lefi_debug_table:
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// EFI_IMAGE_DEBUG_DIRECTORY_ENTRY
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.long 0 // Characteristics
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.long 0 // TimeDateStamp
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.short 0 // MajorVersion
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.short 0 // MinorVersion
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.long IMAGE_DEBUG_TYPE_CODEVIEW // Type
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.long .Lefi_debug_entry_size // SizeOfData
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.long 0 // RVA
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.long .Lefi_debug_entry - .Ldoshdr // FileOffset
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.set .Lefi_debug_table_size, . - .Lefi_debug_table
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.previous
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.Lefi_debug_entry:
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// EFI_IMAGE_DEBUG_CODEVIEW_NB10_ENTRY
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.ascii "NB10" // Signature
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.long 0 // Unknown
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.long 0 // Unknown2
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.long 0 // Unknown3
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.asciz ZBOOT_EFI_PATH
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.set .Lefi_debug_entry_size, . - .Lefi_debug_entry
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#endif
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.p2align 12
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.Lefi_header_end:
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