2022-08-09 20:04:52 +01:00
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# SPDX-FileCopyrightText: 2022 Andrius Štikonas <andrius@stikonas.eu>
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# SPDX-FileCopyrightText: 2017 Jeremiah Orians <jeremiah@pdp10.guru>
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#
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# SPDX-License-Identifier: GPL-3.0-or-later
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# DOS MZ header
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4D 5A # Signature
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00 00 # Number of bytes in the last page.
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00 00 # Number of whole/partial pages
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00 00 # Number of entries in the relocation table.
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00 00 # Header size
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00 00 # Minimum allocation
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00 00 # Maximum allocation
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00 00 # Relocatable segment address for SS
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00 00 # Initial value for SP
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00 00 # Checksum (I don't think is looked at)
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00 00 # Initial value for IP (Seems ignored)
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00 00 # Relocatable segment address for CS (Seems ignored)
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00 00 # The (absolute) offset to the relocation table.
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00 00 # Value used for overlay management. If zero, this is the main executable
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00 00 00 00 00 00 00 00 # Reserved in PE
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00 00 # OEM identifier
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00 00 # OEM info
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00 00 00 00 00 00 00 00 00 00 # The required reserved 20 bytes of NULLS
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00 00 00 00 00 00 00 00 00 00
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40 00 00 00 # Starting address of the PE header
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# [0x40]
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# PE header
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50 45 00 00 # Signature "PE"
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64 86 # Machine
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01 00 # number of sections
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00 00 00 00 # Timestamp supposedly
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00 00 00 00 # PointerToSymbolTable
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00 00 00 00 # number of symbols
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F0 00 # SizeOfOptionalHeader
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00 00 # 'Characteristics'
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# [0x58]
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# COFF header bits
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0B 02 # Magic PE32+ (64 bit)
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00 00 # Linker version
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00 00 00 00 # size of code
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00 00 00 00 # sizeOfInitializedData
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00 00 00 00 # SizeOfUninitializedData
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00 10 00 00 # AddressOfEntryPoint
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00 10 00 00 # BaseOfCode
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00 00 00 80 01 00 00 00 # ImageBase
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01 00 00 00 # SectionAlignment
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01 00 00 00 # FileAlignment
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00 00 00 00 # OperatingSystemVersion
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00 00 00 00 # ImageVersion
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00 00 00 00 # SubsystemVersion
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00 00 00 00 # Win32VersionValue
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00 20 00 00 # SizeOfImage
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70 01 00 00 # SizeOfHeaders
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00 00 00 00 # CheckSum (isn't used at all)
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0A 00 # Subsystem
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00 00 # DllCharacteristics
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00 00 00 00 # SizeOfStackReserve
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00 00 00 00 # SizeOfStackCommit
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00 00 00 00 # SizeOfHeapReserve
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00 00 00 00 # SizeOfHeapCommit
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00 00 00 00 # LoaderFlags
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00 00 00 00 # NumberOfRvaAndSizes
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# [0xB8]
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# Data directories (has to be 16 entries always 16bytes per entry)
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00 00 00 00 # Export Table
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00 00 00 00 # Size of Export Table
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00 00 00 00 # Import Table
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10 00 00 00 # Size of Import Table
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00 00 00 00 # Resource Table
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00 00 00 00 # Size of Resource Table
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00 00 00 00 # Exception Table
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00 00 00 00 # Size of Exception Table
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00 00 00 00 # Certificate Table
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00 00 00 00 # Size of Certificate Table
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00 00 00 00 # Base Relocation Table
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00 00 00 00 # Size of Base Relocation Table
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00 00 00 00 # Debug Table
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00 00 00 00 # Size of Debug Table
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00 00 00 00 # Architecture Data Table
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00 00 00 00 # Size of Architecture Data Table
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00 00 00 00 # Global Pointer
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00 00 00 00 # NULL
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00 00 00 00 # TLS Table
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00 00 00 00 # Size of TLS Table
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00 00 00 00 # Load Config Table
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00 00 00 00 # Size of Load Config Table
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00 00 00 00 # Bound Import Table
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00 00 00 00 # Size of Bound Import Table
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00 00 00 00 # Import Address Table
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00 00 00 00 # Size of Import Address Table
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00 00 00 00 # Delay Import Descriptor Table
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00 00 00 00 # Size of Delay Import Descriptor Table
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00 00 00 00 # CLR Runtime header table
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00 00 00 00 # Size of CLR Runtime Header table
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00 00 00 00 00 00 00 00 # MUST BE NULL
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# no idea what it is yet
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00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00
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# [0x148]
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# Start of section headers
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00 00 00 00 00 00 00 00 ; Name of the section (empty) but could set to ".text"
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D4 03 00 00 ; VirtualSize
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00 10 00 00 ; VirtualAddress
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D4 03 00 00 ; SizeOfRawData
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70 01 00 00 ; PointerToRawData
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00 00 00 00 ; PointerToRelocations
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00 00 00 00 ; PointerToLinenumbers
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00 00 ; NumberOfRelocations
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00 00 ; NumberOfLinenumbers
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00 00 00 00 ; 'Characteristics'
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# [0x170]
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# efi_main(void *image_handle, struct efi_system_table *system)
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# :_start
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4889E5 ; COPY_RSP_to_RBP # save stack pointer
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4989CF ; COPY_RCX_to_R15 # save image_handle
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4C8B72 60 ; LOAD64_into_R14_from_Address_RDX_Immediate8 !96 # system->boot
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4C8935 BB030000 ; STORE64_rel_R14 %SystemBoot # save system->boot
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# Allocate pool for single-character label table
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52 ; PUSH_RDX # allocate stack for table
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4989E0 ; COPY_RSP_to_R8 # arg3 = &table
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31D2 ; XOR_EDX_EDX # zero rdx
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B6 08 ; LOADI8_DH !0x8 # arg2 = 256 * 8 = 2048 = 0x800
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6A 02 ; PUSH !2
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59 ; POP_RCX # arg1 = EFI_LOADER_DATA
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4883EC 18 ; SUBI8_RSP !24 # allocate shadow stack space for UEFI
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41FF56 40 ; CALL_R14_Immediate8 !64 # system->boot->allocate_pool(EFI_LOADER_DATA, 2048, &table)
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4883C4 18 ; ADDI8_RSP !24 # deallocate stack
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58 ; POP_RAX # get table
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488905 94030000 ; STORE64_rel_RAX %table # save table
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# Open Loaded Image protocol
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50 ; PUSH_RAX # allocate stack for image
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4989E0 ; COPY_RSP_to_R8 # arg3 = &image
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488B15 71030000 ; LOAD64_rel_RDX !LOADED_IMAGE_PROTOCOL_8 # EFI_LOADED_IMAGE_PROTOCOL_GUID (last 64 bits)
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52 ; PUSH_RDX # push last 64 bits onto stack
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488B15 61030000 ; LOAD64_rel_RDX !LOADED_IMAGE_PROTOCOL # EFI_LOADED_IMAGE_PROTOCOL_GUID (first 64 bits)
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52 ; PUSH_RDX # push first 64 bits onto stack
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4889E2 ; COPY_RSP_to_RDX # arg2 = &guid
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6A 01 ; PUSH !1 # arg6 = EFI_OPEN_PROTOCOL_BY_HANDLE_PROTOCOL
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6A 00 ; PUSH !0 # arg5 = NULL
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4D89F9 ; COPY_R15_to_R9 # arg4 = image_handle
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4C89F9 ; COPY_R15_to_RCX # arg1 = image_handle
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4883EC 20 ; SUBI8_RSP !32 # allocate shadow stack space for UEFI function
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41FF96 18010000 ; CALL_R14_Immediate32 %280 # system->boot->open_protocol(image_handle, &guid, &image, image_handle, 0, EFI_OPEN_PROTOCOL_BY_HANDLE_PROTOCOL)
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488B4424 40 ; LOAD64_into_RAX_from_Address_RSP_Immediate8 !64 # get_image
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4889C1 ; COPY_RCX_to_RAX # save image
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# Command line args
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488B58 38 ; LOAD64_into_RBX_from_Address_RAX_Immediate8 !56 # options = image->load_options
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# :loop_options1 [_start+0x68] # Skip application name
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4883C3 02 ; ADDI8_RBX !2 # ++options
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8A03 ; LOAD8_AL_from_Address_RBX # *options
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3C 20 ; CMPI8_AL !0x20 # if *options != ' '
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75 F6 ; JNE8 !loop_options1 # then jump
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4883C3 02 ; ADDI8_RBX !2 # ++options
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4989DC ; COPY_RBX_to_R12 # save input file
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# :loop_options2 [_start+0x79] # Skip argv[1]
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4883C3 02 ; ADDI8_RBX !2 # ++options
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8A03 ; LOAD8_AL_from_Address_RBX # *options
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3C 20 ; CMPI8_AL !0x20 # if *options != ' '
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75 F6 ; JNE8 !loop_options2 # then jump
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C603 00 ; STOREI8_into_Address_RBX !0 # *options = 0;
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4883C3 02 ; ADDI8_RBX !2 # ++options
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4989DD ; COPY_RBX_to_R13 # save output file
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# Get root file system
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50 ; PUSH_RAX # allocate stack for rootfs
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4989E0 ; COPY_RSP_to_R8 # arg3 = &rootfs
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488B15 24030000 ; LOAD64_rel_RDX %SIMPLE_FS_PROTOCOL_8 # EFI_SIMPLE_FILE_SYSTEM_PROTOCOL_GUID (last 64 bits)
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52 ; PUSH_RDX # push last 64 bits onto stack
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488B15 14030000 ; LOAD64_rel_RDX %SIMPLE_FS_PROTOCOL # EFI_SIMPLE_FILE_SYSTEM_PROTOCOL_GUID (first 64 bits)
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52 ; PUSH_RDX # push first 64 bits onto stack
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4889E2 ; COPY_RSP_to_RDX # arg2 = &guid
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6A 01 ; PUSH !1 # arg6 = EFI_OPEN_PROTOCOL_BY_HANDLE_PROTOCOL
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6A 00 ; PUSH !0 # arg5 = NULL
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4D89F9 ; COPY_R15_to_R9 # arg4 = image_handle
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488B49 18 ; LOAD64_into_RCX_from_Address_RCX_Immediate8 !24 # arg1 = root_device = image->device
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4883EC 20 ; SUBI8_RSP !32 # allocate shadow stack space for UEFI function
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41FF96 18010000 ; CALL_R14_Immediate32 %280 # system->boot->open_protocol(root_device, &guid, &rootfs, image_handle, 0, EFI_OPEN_PROTOCOL_BY_HANDLE_PROTOCOL)
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488B4C24 40 ; LOAD64_into_RCX_from_Address_RSP_Immediate8 !64 # get rootfs
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# Get root directory
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52 ; PUSH_RDX # allocate stack for rootdir
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4889E2 ; COPY_RSP_to_RDX # arg2 = &rootdir
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50 ; PUSH_RAX # allocate shadow stack space for UEFI function
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50 ; PUSH_RAX # allocate shadow stack space for UEFI function
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FF51 08 ; CALL_RCX_Immediate8 !8 # rootfs->open_volume(rootfs, &rootdir)
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58 ; POP_RAX # deallocate stack
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58 ; POP_RAX # deallocate stack
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2022-08-14 17:25:28 +01:00
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415E ; POP_R14 # save rootdir
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2022-08-09 20:04:52 +01:00
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# Open file for reading
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52 ; PUSH_RDX # allocate stack for fin
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4889E2 ; COPY_RSP_to_RDX # arg2 = &fin
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6A 01 ; PUSH !1 # arg5 = EFI_FILE_READ_ONLY
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6A 01 ; PUSH !1 # prepare to set arg4 to EFI_FILE_MODE_READ
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4159 ; POP_R9 # arg4 = EFI_FILE_MODE_READ
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4D89E0 ; COPY_R12_to_R8 # arg3 = in
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4C89F1 ; COPY_R14_to_RCX # arg1 = rootdir
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4883EC 20 ; SUBI8_RSP !32 # allocate shadow stack space for UEFI function
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FF51 08 ; CALL_RCX_Immediate8 !8 # rootdir->open()
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488B7C24 28 ; LOAD64_into_RDI_from_Address_RSP_Immediate8 !40 # get fin
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# Open file for writing
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52 ; PUSH_RDX # allocate stack for fout
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4889E2 ; COPY_RSP_to_RDX # arg2 = &fout
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6A 00 ; PUSH !0 # arg5 = 0
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6A 07 ; PUSH !7 # to get 0x8000000000000003 we set the rightmost 3 bits
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4159 ; POP_R9 # and then do right rotation by 1
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49D1C9 ; ROR_R9 # arg4 = EFI_FILE_MODE_CREATE| EFI_FILE_MODE_WRITE | EFI_FILE_MODE_READ
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4D89E8 ; COPY_R13_to_R8 # arg3 = out
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4C89F1 ; COPY_R14_to_RCX # arg1 = rootdir
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4883EC 20 ; SUBI8_RSP !32 # allocate shadow stack space for UEFI function
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FF51 08 ; CALL_RCX_Immediate8 !8 # rootdir->open()
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488B5C24 28 ; LOAD64_into_RBX_from_Address_RSP_Immediate8 !40 # get fout
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# [_start+0x107]
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49C7C7 FFFFFFFF ; LOADI32_R15 %-1 # Our flag for byte processing
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49C7C6 00000000 ; LOADI32_R14 %0 # temp storage for the sum
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49C7C5 00000000 ; LOADI32_R13 %0 # Our starting IP
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E8 2B000000 ; CALLI32 %First_pass # Process it
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# rewind input file
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4889F9 ; COPY_RDI_to_RCX # Using our input file
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31D2 ; XOR_EDX_EDX # Offset Zero
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50 ; PUSH_RAX # allocate shadow stack space for UEFI function
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50 ; PUSH_RAX # allocate shadow stack space for UEFI function
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FF51 38 ; CALL_RCX_Immediate8 !56 # fin->set_position(fin, 0)
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58 ; POP_RAX # deallocate stack
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58 ; POP_RAX # deallocate stack
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49C7C7 FFFFFFFF ; LOADI32_R15 %-1 # Our flag for byte processing
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49C7C6 00000000 ; LOADI32_R14 %0 # temp storage for the sum
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49C7C5 00000000 ; LOADI32_R13 %0 # Our starting IP
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E8 EF000000 ; CALLI32 %Second_pass # Process it
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E9 35020000 ; JMP32 %Done
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# :First_pass [_start+0x14C]
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E8 BB010000 ; CALLI32 %Read_byte
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# Deal with EOF
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483D FCFFFFFF ; CMPI32_RAX %-4
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0F84 67000000 ; JE32 %First_pass_done
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# Check for :
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483D 3A000000 ; CMPI32_RAX %0x3a
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0F85 05000000 ; JNE32 %First_pass_0
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# Deal with label
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E8 EB010000 ; CALLI32 %StoreLabel
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# :First_pass_0 [_start+0x16E]
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# Check for %
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483D 25000000 ; CMPI32_RAX %0x25
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0F84 39000000 ; JE32 %First_pass_pointer
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# Deal with everything else
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E8 46000000 ; CALLI32 %hex # Process our char
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# Deal with EOF
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483D FCFFFFFF ; CMPI32_RAX %-4
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0F84 39000000 ; JE32 %First_pass_done
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# deal with -1 values
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483D 00000000 ; CMPI32_RAX %0
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0F8C B5FFFFFF ; JL32 %First_pass
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# deal with toggle
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4981FF 00000000 ; CMPI32_R15 %0
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0F84 07000000 ; JE32 %First_pass_1
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4981C5 01000000 ; ADDI32_to_R13 %1 # Increment IP
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# :First_pass_1 [_start+0xAB]
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49F7D7 ; NOT_R15
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E9 99FFFFFF ; JMP32 %First_pass
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# :First_pass_pointer [_start+0x1B3]
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# Deal with Pointer to label
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E8 54010000 ; CALLI32 %Read_byte # Drop the char
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4981C5 04000000 ; ADDI32_to_R13 %4 # Increment IP
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E9 88FFFFFF ; JMP32 %First_pass # Loop again
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# :First_pass_done [_start+0x1C4]
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C3 ; RET
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# :hex [_start+0x1C5]
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# deal with EOF
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483D FCFFFFFF ; CMPI32_RAX %-4
|
|
|
|
0F84 DC000000 ; JE32 %EOF
|
|
|
|
# deal with line comments starting with #
|
|
|
|
483D 23000000 ; CMPI32_RAX %0x23
|
|
|
|
0F84 E8000000 ; JE32 %ascii_comment
|
|
|
|
# deal with line comments starting with ;
|
|
|
|
483D 3B000000 ; CMPI32_RAX %0x3b
|
|
|
|
0F84 DC000000 ; JE32 %ascii_comment
|
|
|
|
# deal all ascii less than 0
|
|
|
|
483D 30000000 ; CMPI32_RAX %0x30
|
|
|
|
0F8C C8000000 ; JL32 %ascii_other
|
|
|
|
# deal with 0-9
|
|
|
|
483D 3A000000 ; CMPI32_RAX %0x3a
|
|
|
|
0F8C AD000000 ; JL32 %ascii_num
|
|
|
|
# deal with all ascii less than A
|
|
|
|
483D 41000000 ; CMPI32_RAX %0x41
|
|
|
|
0F8C B0000000 ; JL32 %ascii_other
|
|
|
|
# deal with A-F
|
|
|
|
483D 47000000 ; CMPI32_RAX %0x47
|
|
|
|
0F8C 9F000000 ; JL32 %ascii_high
|
|
|
|
# deal with all ascii less than a
|
|
|
|
483D 61000000 ; CMPI32_RAX %0x61
|
|
|
|
0F8C 98000000 ; JL32 %ascii_other
|
|
|
|
# deal with a-f
|
|
|
|
483D 67000000 ; CMPI32_RAX %0x67
|
|
|
|
0F8C 82000000 ; JL32 %ascii_low
|
|
|
|
# The rest that remains needs to be ignored
|
|
|
|
E9 87000000 ; JMP32 %ascii_other
|
|
|
|
|
|
|
|
# :Second_pass [_start+0x236]
|
|
|
|
E8 D1000000 ; CALLI32 %Read_byte
|
|
|
|
|
|
|
|
# Deal with EOF
|
|
|
|
483D FCFFFFFF ; CMPI32_RAX %-4
|
|
|
|
0F84 65000000 ; JE32 %Second_pass_done
|
|
|
|
|
|
|
|
# Simply drop the label
|
|
|
|
483D 3A000000 ; CMPI32_RAX %0x3a
|
|
|
|
0F85 0A000000 ; JNE32 %Second_pass_0
|
|
|
|
|
|
|
|
E8 B4000000 ; CALLI32 %Read_byte
|
|
|
|
E9 D9FFFFFF ; JMP32 %Second_pass
|
|
|
|
|
|
|
|
# :Second_pass_0 [_start+0x25D]
|
|
|
|
# Deal with % pointer
|
|
|
|
483D 25000000 ; CMPI32_RAX %0x25
|
|
|
|
0F85 0A000000 ; JNE32 %Second_pass_1
|
|
|
|
|
|
|
|
E8 F4000000 ; CALLI32 %StorePointer
|
|
|
|
E9 C3FFFFFF ; JMP32 %Second_pass
|
|
|
|
|
|
|
|
# :Second_pass_1 [_start+0x273]
|
|
|
|
# Deal with everything else
|
|
|
|
E8 4DFFFFFF ; CALLI32 %hex # Process our char
|
|
|
|
|
|
|
|
# Deal with EOF
|
|
|
|
483D FCFFFFFF ; CMPI32_RAX %-4
|
|
|
|
0F84 28000000 ; JE32 %Second_pass_done
|
|
|
|
|
|
|
|
# deal with -1 values
|
|
|
|
483D 00000000 ; CMPI32_RAX %0
|
|
|
|
0F8C A6FFFFFF ; JL32 %Second_pass
|
|
|
|
|
|
|
|
# deal with toggle
|
|
|
|
4981FF 00000000 ; CMPI32_R15 %0
|
|
|
|
0F84 4D000000 ; JE32 %print
|
|
|
|
|
|
|
|
# process first byte of pair
|
|
|
|
4989C6 ; COPY_RAX_to_R14
|
|
|
|
49C7C7 00000000 ; LOADI32_R15 %0
|
|
|
|
E9 8AFFFFFF ; JMP32 %Second_pass
|
|
|
|
|
|
|
|
# :Second_pass_done [_start+0x2AC]
|
|
|
|
C3 ; RET
|
|
|
|
|
|
|
|
# :EOF [_start+0x2AD]
|
|
|
|
C3 ; RET
|
|
|
|
# :ascii_num [_start+0x2AE]
|
|
|
|
4883E8 30 ; SUBI8_from_RAX !0x30
|
|
|
|
C3 ; RET
|
|
|
|
# :ascii_low [_start+0x2B3]
|
|
|
|
4883E8 57 ; SUBI8_from_RAX !0x57
|
|
|
|
C3 ; RET
|
|
|
|
# :ascii_high [_start+0x2B8]
|
|
|
|
4883E8 37 ; SUBI8_from_RAX !0x37
|
|
|
|
C3 ; RET
|
|
|
|
# :ascii_other [_start+0x2BD]
|
|
|
|
48C7C0 FFFFFFFF ; LOADI32_RAX %-1
|
|
|
|
C3 ; RET
|
|
|
|
# :ascii_comment [_start+0x2C5]
|
|
|
|
E8 42000000 ; CALLI32 %Read_byte
|
|
|
|
483D 0D000000 ; CMPI32_RAX %0xd
|
|
|
|
0F84 0C000000 ; JE32 %ascii_comment_cr
|
|
|
|
483D 0A000000 ; CMPI32_RAX %0xa
|
|
|
|
0F85 E3FFFFFF ; JNE32 %ascii_comment
|
|
|
|
# :ascii_comment_cr [_start+0x2E2]
|
|
|
|
48C7C0 FFFFFFFF ; LOADI32_RAX %-1
|
|
|
|
C3 ; RET
|
|
|
|
|
|
|
|
# process second byte of pair
|
|
|
|
# :print [_start+0x2EA]
|
|
|
|
# update the sum and store in output
|
|
|
|
49C1E6 04 ; SHL8_R14 !4
|
|
|
|
4C01F0 ; ADD_R14_to_RAX
|
|
|
|
|
|
|
|
# flip the toggle
|
|
|
|
49F7D7 ; NOT_R15 # R15 = -1
|
|
|
|
|
|
|
|
48C7C2 01000000 ; LOADI32_RDX %1 # set the size of chars we want
|
|
|
|
E8 2F000000 ; CALLI32 %print_chars
|
|
|
|
|
|
|
|
4981C5 01000000 ; ADDI32_to_R13 %1 # Increment IP
|
|
|
|
E9 2AFFFFFF ; JMP32 %Second_pass
|
|
|
|
|
|
|
|
|
|
|
|
# :Read_byte [_start+0x30C]
|
|
|
|
4889F9 ; COPY_RDI_to_RCX # arg1 = fin
|
|
|
|
6A 01 ; PUSH !1 # size = 1
|
|
|
|
4889E2 ; COPY_RSP_to_RDX # arg2 = &size
|
|
|
|
56 ; PUSH_RSI # allocate stack
|
|
|
|
4989E0 ; COPY_RSP_to_R8 # arg3 = &input
|
|
|
|
50 ; PUSH_RAX # allocate shadow stack space for UEFI function
|
|
|
|
50 ; PUSH_RAX # allocate shadow stack space for UEFI function
|
|
|
|
50 ; PUSH_RAX # allocate shadow stack space for UEFI function
|
|
|
|
FF51 20 ; CALL_RCX_Immediate8 !32 # fin->read()
|
|
|
|
58 ; POP_RAX # deallocate stack
|
|
|
|
58 ; POP_RAX # deallocate stack
|
|
|
|
58 ; POP_RAX # deallocate stack
|
|
|
|
58 ; POP_RAX # save input to rax
|
|
|
|
5E ; POP_RSI # save size to rsi
|
|
|
|
|
|
|
|
# If the file ended (0 bytes read) return EOF
|
|
|
|
85F6 ; TEST_ESI_ESI # if size = 0
|
|
|
|
75 07 ; JNE8 !Read_byte_1
|
|
|
|
48C7C0 FCFFFFFF ; LOADI32_RAX %-4 # Put EOF in rax
|
|
|
|
|
|
|
|
# :Read_byte_1 [_start+0x32E]
|
|
|
|
C3 ; RET # return
|
|
|
|
|
|
|
|
# Writes bytes stored in rax
|
|
|
|
# :print_chars [_start+0x32F]
|
|
|
|
4889D9 ; COPY_RBX_to_RCX # arg1 = fout
|
|
|
|
52 ; PUSH_RDX # set size
|
|
|
|
4889E2 ; COPY_RSP_to_RDX # arg2 = &size
|
|
|
|
50 ; PUSH_RAX # allocate stack
|
|
|
|
4989E0 ; COPY_RSP_to_R8 # arg3 = &output
|
|
|
|
50 ; PUSH_RAX # allocate shadow stack space for UEFI function
|
|
|
|
50 ; PUSH_RAX # allocate shadow stack space for UEFI function
|
|
|
|
50 ; PUSH_RAX # allocate shadow stack space for UEFI function
|
|
|
|
FF51 28 ; CALL_RCX_Immediate8 !40 # fout->write()
|
|
|
|
4883C4 28 ; ADDI8_RSP !40 # deallocate stack
|
|
|
|
|
|
|
|
C3 ; RET # return
|
|
|
|
|
|
|
|
# :Get_table_target [_start+0x345]
|
|
|
|
E8 C2FFFFFF ; CALLI32 %Read_byte # Get single char label
|
|
|
|
48C1E0 03 ; SHL8_RAX !3 # Each label in table takes 8 bytes to store
|
|
|
|
488B0D 6F000000 ; LOAD64_rel_RCX %table # Get table
|
|
|
|
4801C8 ; ADD_RCX_to_RAX # Calculate offset
|
|
|
|
C3 ; RET
|
|
|
|
|
|
|
|
# :StoreLabel [_start+0x359]
|
|
|
|
E8 E7FFFFFF ; CALLI32 %Get_table_target
|
|
|
|
4C8928 ; STORE32_R13_to_Address_in_RAX # Write out pointer to table
|
|
|
|
C3 ; RET
|
|
|
|
|
|
|
|
# :StorePointer [_start+0x362]
|
|
|
|
4981C5 04000000 ; ADDI32_to_R13 %4 # Increment IP
|
|
|
|
E8 D7FFFFFF ; CALLI32 %Get_table_target # Get address of pointer
|
|
|
|
678B00 ; LOAD32_Address_in_RAX_into_RAX # Get pointer
|
|
|
|
4C29E8 ; SUB_R13_from_RAX # target - ip
|
|
|
|
48C7C2 04000000 ; LOADI32_RDX %4 # set the size of chars we want
|
|
|
|
E8 AFFFFFFF ; CALLI32 %print_chars
|
|
|
|
C3 ; RET
|
|
|
|
|
|
|
|
# :Done [_start+0x381]
|
|
|
|
# Free pool
|
|
|
|
488B0D 3C000000 ; LOAD64_rel_RCX %table # arg1 = table
|
|
|
|
50 ; PUSH_RAX # allocate shadow stack space for UEFI function
|
|
|
|
4C8B35 3C000000 ; LOAD64_rel_R14 %SystemBoot # get system->boot
|
|
|
|
41FF56 48 ; CALL_R14_Immediate8 !72 # system->boot->free_pool(table)
|
|
|
|
|
|
|
|
4889F9 ; COPY_RDI_to_RCX # arg1 = fin
|
|
|
|
FF51 10 ; CALL_RCX_Immediate8 !16 # fin->close()
|
|
|
|
4889D9 ; COPY_RBX_to_RCX # arg1 = fout
|
|
|
|
FF51 10 ; CALL_RCX_Immediate8 !16 # fout->close()
|
|
|
|
|
|
|
|
4889EC ; COPY_RBP_to_RSP # restore stack
|
|
|
|
C3 ; RET # return to UEFI
|
|
|
|
|
|
|
|
|
|
|
|
# Protocol GUIDs
|
|
|
|
# :LOADED_IMAGE_PROTOCOL [_start+0x3A4]
|
|
|
|
A1 31 1B 5B ; %0x5b1b31a1
|
|
|
|
62 95 ; @0x9562
|
|
|
|
D2 11 ; @0x11d2
|
|
|
|
# :LOADED_IMAGE_PROTOCOL_8 [_start+0x3AC]
|
|
|
|
8E 3F 00 A0 C9 69 72 3B ; !0x8e !0x3f !0 !0xa0 !0xc9 !0x69 !0x72 !0x3b
|
|
|
|
|
|
|
|
# :SIMPLE_FS_PROTOCOL [_start+0x3B4]
|
|
|
|
22 5B 4E 96 ; %0x0964e5b22
|
|
|
|
59 64 ; @0x6459
|
|
|
|
D2 11 ; @0x11d2
|
|
|
|
# :SIMPLE_FS_PROTOCOL_8 [_start+0x3BC]
|
|
|
|
8E 39 00 A0 C9 69 72 3B ; !0x8e !0x39 !0 !0xa0 !0xc9 !0x69 !0x72 !0x3b
|
|
|
|
|
|
|
|
# :table [_start+0x3C4]
|
|
|
|
00000000 00000000
|
|
|
|
|
|
|
|
# :SystemBoot [_start+0x3CC]
|
|
|
|
00000000 00000000
|
|
|
|
|
|
|
|
# :PE32_end [_start+0x3D4]
|