mirror of
https://github.com/AsahiLinux/m1n1
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115 lines
3.2 KiB
Python
115 lines
3.2 KiB
Python
# SPDX-License-Identifier: MIT
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from construct import *
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BootArgs = Struct(
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"revision" / Hex(Int16ul),
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"version" / Hex(Int16ul),
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Padding(4),
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"virt_base" / Hex(Int64ul),
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"phys_base" / Hex(Int64ul),
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"mem_size" / Hex(Int64ul),
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"top_of_kernel_data" / Hex(Int64ul),
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"video" / Struct(
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"base" / Hex(Int64ul),
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"display" / Hex(Int64ul),
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"stride" / Hex(Int64ul),
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"width" / Hex(Int64ul),
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"height" / Hex(Int64ul),
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"depth" / Hex(Int64ul),
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),
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"machine_type" / Hex(Int32ul),
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Padding(4),
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"devtree" / Hex(Int64ul),
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"devtree_size" / Hex(Int32ul),
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"cmdline" / PaddedString(608, "ascii"),
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Padding(4),
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"boot_flags" / Hex(Int64ul),
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"mem_size_actual" / Hex(Int64ul),
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)
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MachOLoadCmdType = "LoadCmdType" / Enum(Int32ul,
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UNIXTHREAD = 0x05,
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SEGMENT_64 = 0x19,
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UUID = 0x1b,
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BUILD_VERSION = 0x32,
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DYLD_CHAINED_FIXUPS = 0x80000034,
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FILESET_ENTRY = 0x80000035,
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)
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MachOArmThreadStateFlavor = "ThreadStateFlavor" / Enum(Int32ul,
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THREAD64 = 6,
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)
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MachOHeader = Struct(
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"magic" / Hex(Int32ul),
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"cputype" / Hex(Int32ul),
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"cpusubtype" / Hex(Int32ul),
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"filetype" / Hex(Int32ul),
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"ncmds" / Hex(Int32ul),
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"sizeofcmds" / Hex(Int32ul),
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"flags" / Hex(Int32ul),
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"reserved" / Hex(Int32ul),
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)
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MachOVmProt = FlagsEnum(Int32sl,
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PROT_READ = 0x01,
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PROT_WRITE = 0x02,
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PROT_EXECUTE = 0x04,
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)
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MachOCmdUnixThread = GreedyRange(Struct(
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"flavor" / MachOArmThreadStateFlavor,
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"data" / Prefixed(ExprAdapter(Int32ul, obj_ * 4, obj_ / 4), Switch(this.flavor, {
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MachOArmThreadStateFlavor.THREAD64: Struct(
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"x" / Array(29, Hex(Int64ul)),
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"fp" / Hex(Int64ul),
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"lr" / Hex(Int64ul),
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"sp" / Hex(Int64ul),
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"pc" / Hex(Int64ul),
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"cpsr" / Hex(Int32ul),
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"flags" / Hex(Int32ul),
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)
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})),
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))
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MachOCmdSegment64 = Struct(
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"segname" / PaddedString(16, "ascii"),
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"vmaddr" / Hex(Int64ul),
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"vmsize" / Hex(Int64ul),
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"fileoff" / Hex(Int64ul),
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"filesize" / Hex(Int64ul),
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"maxprot" / MachOVmProt,
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"initprot" / MachOVmProt,
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"nsects" / Int32ul,
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"flags" / Hex(Int32ul),
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"sections" / GreedyRange(Struct(
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"sectname" / PaddedString(16, "ascii"),
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"segname" / PaddedString(16, "ascii"),
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"addr" / Hex(Int64ul),
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"size" / Hex(Int64ul),
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"offset" / Hex(Int32ul),
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"align" / Hex(Int32ul),
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"reloff" / Hex(Int32ul),
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"nreloc" / Hex(Int32ul),
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"flags" / Hex(Int32ul),
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"reserved1" / Hex(Int32ul),
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"reserved2" / Hex(Int32ul),
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"reserved3" / Hex(Int32ul),
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)),
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)
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MachOCmd = Struct(
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"cmd" / Hex(MachOLoadCmdType),
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"args" / Prefixed(ExprAdapter(Int32ul, obj_ - 8, obj_ + 8), Switch(this.cmd, {
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MachOLoadCmdType.UNIXTHREAD: MachOCmdUnixThread,
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MachOLoadCmdType.SEGMENT_64: MachOCmdSegment64,
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MachOLoadCmdType.UUID: Hex(Bytes(16)),
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}, default=GreedyBytes)),
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)
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MachOFile = Struct(
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"header" / MachOHeader,
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"cmds" / Array(this.header.ncmds, MachOCmd),
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"extradata" / GreedyBytes,
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)
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