574 lines
16 KiB
C++
574 lines
16 KiB
C++
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macro struct? name
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macro end?.struct?!
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end namespace
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esc end struc
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virtual at 0
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name name
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sizeof.name = $
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end virtual
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purge end?.struct?
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end macro
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esc struc name
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label . : sizeof.name
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namespace .
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end macro
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struct Elf32_Shdr
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sh_name dd ?
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sh_type dd ?
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sh_flags dd ?
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sh_addr dd ?
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sh_offset dd ?
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sh_size dd ?
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sh_link dd ?
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sh_info dd ?
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sh_addralign dd ?
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sh_entsize dd ?
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end struct
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struct Elf32_Sym
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st_name dd ?
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st_value dd ?
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st_size dd ?
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st_info db ?
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st_other db ?
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st_shndx dw ?
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end struct
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struct Elf32_Rel
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r_offset dd ?
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r_info dd ?
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end struct
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struct Elf32_Rela
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r_offset dd ?
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r_info dd ?
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r_addend dd ?
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end struct
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struct Elf32_Phdr
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p_type dd ?
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p_offset dd ?
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p_vaddr dd ?
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p_paddr dd ?
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p_filesz dd ?
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p_memsz dd ?
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p_flags dd ?
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p_align dd ?
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end struct
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purge struct?
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ELFCLASSNONE = 0
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ELFCLASS32 = 1
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ELFCLASS64 = 2
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ELFDATANONE = 0
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ELFDATA2LSB = 1
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ELFDATA2MSB = 2
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ELFOSABI_NONE = 0
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ELFOSABI_HPUX = 1
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ELFOSABI_NETBSD = 2
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ELFOSABI_GNU = 3
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ELFOSABI_LINUX = 3
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ELFOSABI_SOLARIS = 6
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ELFOSABI_AIX = 7
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ELFOSABI_IRIX = 8
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ELFOSABI_FREEBSD = 9
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ELFOSABI_TRU64 = 10
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ELFOSABI_MODESTO = 11
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ELFOSABI_OPENBSD = 12
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ELFOSABI_OPENVMS = 13
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ELFOSABI_NSK = 14
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ELFOSABI_AROS = 15
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ELFOSABI_FENIXOS = 16
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ELFOSABI_CLOUDABI = 17
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ELFOSABI_OPENVOS = 18
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ET_NONE = 0
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ET_REL = 1
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ET_EXEC = 2
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ET_DYN = 3
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ET_CORE = 4
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ET_LOPROC = 0xff00
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ET_HIPROC = 0xffff
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EM_NONE = 0
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EM_M32 = 1
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EM_SPARC = 2
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EM_386 = 3
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EM_68K = 4
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EM_88K = 5
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EM_860 = 7
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EM_MIPS = 8
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EM_X86_64 = 62
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EV_NONE = 0
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EV_CURRENT = 1
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SHN_UNDEF = 0
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SHN_LORESERVE = 0xff00
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SHN_LOPROC = 0xff00
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SHN_HIPROC = 0xff1f
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SHN_ABS = 0xfff1
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SHN_COMMON = 0xfff2
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SHN_HIRESERVE = 0xffff
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SHT_NULL = 0
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SHT_PROGBITS = 1
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SHT_SYMTAB = 2
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SHT_STRTAB = 3
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SHT_RELA = 4
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SHT_HASH = 5
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SHT_DYNAMIC = 6
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SHT_NOTE = 7
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SHT_NOBITS = 8
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SHT_REL = 9
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SHT_SHLIB = 10
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SHT_DYNSYM = 11
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SHT_LOPROC = 0x70000000
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SHT_HIPROC = 0x7fffffff
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SHT_LOUSER = 0x80000000
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SHT_HIUSER = 0xffffffff
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SHF_WRITE = 0x1
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SHF_ALLOC = 0x2
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SHF_EXECINSTR = 0x4
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SHF_MASKPROC = 0xf0000000
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STT_NOTYPE = 0
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STT_OBJECT = 1
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STT_FUNC = 2
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STT_SECTION = 3
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STT_FILE = 4
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STT_LOPROC = 13
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STT_HIPROC = 15
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STB_LOCAL = 0
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STB_GLOBAL = 1
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STB_WEAK = 2
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STB_LOPROC = 13
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STB_HIPROC = 15
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R_386_NONE = 0
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R_386_32 = 1
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R_386_PC32 = 2
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R_386_GOT32 = 3
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R_386_PLT32 = 4
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R_386_COPY = 5
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R_386_GLOB_DAT = 6
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R_386_JMP_SLOT = 7
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R_386_RELATIVE = 8
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R_386_GOTOFF = 9
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R_386_GOTPC = 10
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R_X86_64_NONE = 0
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R_X86_64_64 = 1
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R_X86_64_PC32 = 2
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R_X86_64_GOT32 = 3
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R_X86_64_PLT32 = 4
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R_X86_64_COPY = 5
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R_X86_64_GLOB_DAT = 6
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R_X86_64_JUMP_SLOT = 7
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R_X86_64_RELATIVE = 8
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R_X86_64_GOTPCREL = 9
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R_X86_64_32 = 10
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R_X86_64_32S = 11
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R_X86_64_16 = 12
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R_X86_64_PC16 = 13
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R_X86_64_8 = 14
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R_X86_64_PC8 = 15
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R_X86_64_DPTMOD64 = 16
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R_X86_64_DTPOFF64 = 17
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R_X86_64_TPOFF64 = 18
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R_X86_64_TLSGD = 19
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R_X86_64_TLSLD = 20
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R_X86_64_DTPOFF32 = 21
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R_X86_64_GOTTPOFF = 22
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R_X86_64_TPOFF32 = 23
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R_X86_64_PC64 = 24
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R_X86_64_GOTOFF64 = 25
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R_X86_64_GOTPC32 = 26
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ELF::
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namespace ELF
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if defined Settings.Machine
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MACHINE := Settings.Machine
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else
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MACHINE := EM_386
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end if
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if defined Settings.ABI
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ABI := Settings.ABI
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else
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ABI := ELFOSABI_NONE
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end if
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if MACHINE = EM_386
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R_32 = R_386_32
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R_PC32 = R_386_PC32
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R_GOTOFF = R_386_GOTOFF
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R_PLT32 = R_386_PLT32
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else if MACHINE = EM_X86_64
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R_32 = R_X86_64_32
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R_PC32 = R_X86_64_PC32
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R_PLT32 = R_X86_64_PLT32
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end if
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Header:
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e_ident db 0x7F,'ELF',ELFCLASS32,ELFDATA2LSB,EV_CURRENT,ABI,(16-$) dup 0
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e_type dw ET_REL
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e_machine dw MACHINE
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e_version dd EV_CURRENT
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e_entry dd 0
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e_phoff dd 0
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e_shoff dd SECTION_TABLE_OFFSET
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e_flags dd 0
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e_ehsize dw Content
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e_phentsize dw 0
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e_phnum dw 0
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e_shentsize dw sizeof Elf32_Shdr
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e_shnum dw NUMBER_OF_SECTIONS
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e_shstrndx dw STRING_TABLE_SECTION_INDEX
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Content:
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virtual at 0
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section_table:: rb NUMBER_OF_SECTIONS * sizeof Elf32_Shdr
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end virtual
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virtual at 0
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symbol_table:: rb NUMBER_OF_SYMBOLS * sizeof Elf32_Sym
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end virtual
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virtual at 0
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string_table::
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_null db 0
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_symtab db '.symtab',0
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_strtab db '.strtab',0
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SECTION_NAME_POSITION = $
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rb SECTION_NAME_TABLE_SIZE - $
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STRING_POSITION = $
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rb STRING_TABLE_SIZE - $
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end virtual
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virtual at 0
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relocations:: rb NUMBER_OF_RELOCATIONS * sizeof Elf32_Rel
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end virtual
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element relocatable?
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macro section_org
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local sym
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element sym : relocatable * SECTION_INDEX + SECTION_SYMBOL_INDEX
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SECTION_BASE = sym
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org sym
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align.assume sym, SECTION_ALIGN
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end macro
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RELOCATION_INDEX = 0
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SECTION_INDEX = 1
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SECTION_SYMBOL_INDEX = SECTION_INDEX
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SECTION_RELOCATION_INDEX = RELOCATION_INDEX
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SYMBOL_INDEX = NUMBER_OF_SECTION_SYMBOLS
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SECTION_OFFSET = $%
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SECTION_ALIGN = 4
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SECTION_NAME = '.flat'
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SECTION_FLAGS = SHF_ALLOC + SHF_WRITE + SHF_EXECINSTR
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DEFINED_SECTION = 0
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section_org
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end namespace
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macro section?
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namespace ELF
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SECTION_SIZE = $% - SECTION_OFFSET
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if DEFINED_SECTION | SECTION_SIZE > 0
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store SECTION_OFFSET at section_table : Elf32_Shdr.sh_offset + SECTION_INDEX * sizeof Elf32_Shdr
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store SECTION_SIZE at section_table : Elf32_Shdr.sh_size + SECTION_INDEX * sizeof Elf32_Shdr
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store SECTION_ALIGN at section_table : Elf32_Shdr.sh_addralign + SECTION_INDEX * sizeof Elf32_Shdr
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store SECTION_FLAGS at section_table : Elf32_Shdr.sh_flags + SECTION_INDEX * sizeof Elf32_Shdr
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if $%% = SECTION_OFFSET
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store SHT_NOBITS at section_table : Elf32_Shdr.sh_type + SECTION_INDEX * sizeof Elf32_Shdr
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section $
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else
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store SHT_PROGBITS at section_table : Elf32_Shdr.sh_type + SECTION_INDEX * sizeof Elf32_Shdr
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UNINITIALIZED_LENGTH = $% - $%%
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section $
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db UNINITIALIZED_LENGTH dup 0
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end if
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store SECTION_INDEX at symbol_table : Elf32_Sym.st_shndx + SECTION_SYMBOL_INDEX * sizeof Elf32_Sym
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store STT_SECTION + STB_LOCAL shl 4 at symbol_table : Elf32_Sym.st_info + SECTION_SYMBOL_INDEX * sizeof Elf32_Sym
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if RELOCATION_INDEX > SECTION_RELOCATION_INDEX
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store RELOCATIONS_OFFSET + SECTION_RELOCATION_INDEX * sizeof Elf32_Rel at section_table : Elf32_Shdr.sh_offset + (SECTION_INDEX+1) * sizeof Elf32_Shdr
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store (RELOCATION_INDEX - SECTION_RELOCATION_INDEX) * sizeof Elf32_Rel at section_table : Elf32_Shdr.sh_size + (SECTION_INDEX+1) * sizeof Elf32_Shdr
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store SHT_REL at section_table : Elf32_Shdr.sh_type + (SECTION_INDEX+1) * sizeof Elf32_Shdr
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store SYMBOL_TABLE_SECTION_INDEX at section_table : Elf32_Shdr.sh_link + (SECTION_INDEX+1) * sizeof Elf32_Shdr
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store SECTION_INDEX at section_table : Elf32_Shdr.sh_info + (SECTION_INDEX+1) * sizeof Elf32_Shdr
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store sizeof Elf32_Rel at section_table : Elf32_Shdr.sh_entsize + (SECTION_INDEX+1) * sizeof Elf32_Shdr
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store 4 at section_table : Elf32_Shdr.sh_addralign + (SECTION_INDEX+1) * sizeof Elf32_Shdr
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store SECTION_NAME_POSITION at section_table : Elf32_Shdr.sh_name + (SECTION_INDEX+1) * sizeof Elf32_Shdr
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store SECTION_NAME_POSITION + 4 at section_table : Elf32_Shdr.sh_name + SECTION_INDEX * sizeof Elf32_Shdr
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store SECTION_NAME_POSITION + 4 at symbol_table : Elf32_Sym.st_name + SECTION_SYMBOL_INDEX * sizeof Elf32_Sym
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store '.rel' + SECTION_NAME shl (4*8) : 4 + lengthof (string SECTION_NAME) at string_table:SECTION_NAME_POSITION
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SECTION_NAME_POSITION = SECTION_NAME_POSITION + 4 + lengthof (string SECTION_NAME) + 1
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SECTION_INDEX = SECTION_INDEX + 2
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SECTION_SYMBOL_INDEX = SECTION_SYMBOL_INDEX + 1
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else
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store SECTION_NAME_POSITION at section_table : Elf32_Shdr.sh_name + SECTION_INDEX * sizeof Elf32_Shdr
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store SECTION_NAME_POSITION at symbol_table : Elf32_Sym.st_name + SECTION_SYMBOL_INDEX * sizeof Elf32_Sym
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store SECTION_NAME : lengthof (string SECTION_NAME) at string_table:SECTION_NAME_POSITION
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SECTION_NAME_POSITION = SECTION_NAME_POSITION + lengthof (string SECTION_NAME) + 1
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SECTION_INDEX = SECTION_INDEX + 1
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SECTION_SYMBOL_INDEX = SECTION_SYMBOL_INDEX + 1
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end if
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end if
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end namespace
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end macro
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macro section? declaration*
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namespace ELF
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section
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DEFINED_SECTION = 1
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SECTION_FLAGS = SHF_ALLOC
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SECTION_OFFSET = $%
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SECTION_ALIGN = 4
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match name attributes, declaration
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SECTION_NAME = name
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local seq,list
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match flags =align? boundary, attributes
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SECTION_ALIGN = boundary
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define seq flags
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else match =align? boundary, attributes
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SECTION_ALIGN = boundary
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define seq
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else
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define seq attributes
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end match
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while 1
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match car cdr, seq
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define list car
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define seq cdr
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else
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match any, seq
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define list any
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end match
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break
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end match
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end while
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irpv attribute, list
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match =writeable?, attribute
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SECTION_FLAGS = SECTION_FLAGS or SHF_WRITE
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else match =executable?, attribute
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SECTION_FLAGS = SECTION_FLAGS or SHF_EXECINSTR
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else
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err 'unknown attribute "',`attribute,'"'
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end match
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end irpv
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else
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SECTION_NAME = declaration
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end match
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section_org
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SECTION_RELOCATION_INDEX = RELOCATION_INDEX
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end namespace
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end macro
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macro public? declaration*
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namespace ELF
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match value =as? str, declaration
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SYMBOL_VALUE = value
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SYMBOL_SIZE = sizeof value
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SYMBOL_NAME = string str
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else
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SYMBOL_VALUE = declaration
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SYMBOL_SIZE = sizeof declaration
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SYMBOL_NAME = `declaration
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end match
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if SYMBOL_VALUE relativeto 1 elementof SYMBOL_VALUE & 1 elementof (1 metadataof SYMBOL_VALUE) relativeto relocatable & 1 scaleof (1 metadataof SYMBOL_VALUE) > 0
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SYMBOL_SECTION_INDEX = 1 scaleof (1 metadataof SYMBOL_VALUE)
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SYMBOL_VALUE = SYMBOL_VALUE - 1 elementof SYMBOL_VALUE
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else
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SYMBOL_SECTION_INDEX = SHN_ABS
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end if
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store STRING_POSITION at symbol_table : Elf32_Sym.st_name + SYMBOL_INDEX * sizeof Elf32_Sym
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store SYMBOL_NAME : lengthof SYMBOL_NAME at string_table:STRING_POSITION
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STRING_POSITION = STRING_POSITION + lengthof SYMBOL_NAME + 1
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store SYMBOL_VALUE at symbol_table : Elf32_Sym.st_value + SYMBOL_INDEX * sizeof Elf32_Sym
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store SYMBOL_SIZE at symbol_table : Elf32_Sym.st_size + SYMBOL_INDEX * sizeof Elf32_Sym
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store SYMBOL_SECTION_INDEX at symbol_table : Elf32_Sym.st_shndx + SYMBOL_INDEX * sizeof Elf32_Sym
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if SYMBOL_SIZE
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store STT_OBJECT + STB_GLOBAL shl 4 at symbol_table : Elf32_Sym.st_info + SYMBOL_INDEX * sizeof Elf32_Sym
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else
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store STT_FUNC + STB_GLOBAL shl 4 at symbol_table : Elf32_Sym.st_info + SYMBOL_INDEX * sizeof Elf32_Sym
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end if
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SYMBOL_INDEX = SYMBOL_INDEX + 1
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end namespace
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end macro
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macro extrn? declaration*
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namespace ELF
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local sym,psym
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element sym : relocatable * (-1) + SYMBOL_INDEX
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element psym : PLT + SYMBOL_INDEX
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match str =as? name:size, declaration
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label name:size at sym
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label PLT.name at psym
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SYMBOL_NAME = string str
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SYMBOL_SIZE = size
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else match name:size, declaration
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label name:size at sym
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label PLT.name at psym
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SYMBOL_NAME = `name
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SYMBOL_SIZE = size
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else match str =as? name, declaration
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label name at sym
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label PLT.name at psym
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SYMBOL_NAME = string str
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SYMBOL_SIZE = 0
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else
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label declaration at sym
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label PLT.declaration at psym
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SYMBOL_NAME = `declaration
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SYMBOL_SIZE = 0
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end match
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store STRING_POSITION at symbol_table : Elf32_Sym.st_name + SYMBOL_INDEX * sizeof Elf32_Sym
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store SYMBOL_NAME : lengthof SYMBOL_NAME at string_table:STRING_POSITION
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STRING_POSITION = STRING_POSITION + lengthof SYMBOL_NAME + 1
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store SYMBOL_SIZE at symbol_table : Elf32_Sym.st_size + SYMBOL_INDEX * sizeof Elf32_Sym
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store STT_NOTYPE + STB_GLOBAL shl 4 at symbol_table : Elf32_Sym.st_info + SYMBOL_INDEX * sizeof Elf32_Sym
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SYMBOL_INDEX = SYMBOL_INDEX + 1
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end namespace
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end macro
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element _GLOBAL_OFFSET_TABLE_
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RVA? equ -_GLOBAL_OFFSET_TABLE_+
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element PLT?
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calminstruction dword? value
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compute value, value
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check ~ value relativeto 0 & value relativeto 1 elementof value & 1 elementof (1 metadataof value) relativeto ELF.relocatable
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jyes r_32
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check ~ value relativeto 0 & (value + _GLOBAL_OFFSET_TABLE_) relativeto 1 elementof (value + _GLOBAL_OFFSET_TABLE_) & 1 elementof (1 metadataof (value + _GLOBAL_OFFSET_TABLE_)) relativeto ELF.relocatable
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jyes r_gotoff
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check ~ value relativeto 0 & (value + ELF.SECTION_BASE) relativeto 1 elementof (value + ELF.SECTION_BASE)
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jno plain
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check 1 elementof (1 metadataof (value + ELF.SECTION_BASE)) relativeto ELF.relocatable
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jyes r_pc32
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check 1 elementof (1 metadataof (value + ELF.SECTION_BASE)) relativeto PLT
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jyes r_plt32
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plain:
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emit 4, value
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exit
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local offset, info
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r_32:
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compute info, ELF.R_32 + (0 scaleof (1 metadataof value)) shl 8
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jump add_relocation
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r_gotoff:
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compute value, value + _GLOBAL_OFFSET_TABLE_
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compute info, ELF.R_GOTOFF + (0 scaleof (1 metadataof value)) shl 8
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jump add_relocation
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r_pc32:
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compute value, value + (ELF.SECTION_BASE + $% - ELF.SECTION_OFFSET)
|
|
compute info, ELF.R_PC32 + (0 scaleof (1 metadataof value)) shl 8
|
|
jump add_relocation
|
|
r_plt32:
|
|
compute value, value + (ELF.SECTION_BASE + $% - ELF.SECTION_OFFSET)
|
|
compute info, ELF.R_PLT32 + (0 scaleof (1 metadataof value)) shl 8
|
|
jump add_relocation
|
|
add_relocation:
|
|
compute offset, $%
|
|
emit 4, 0 scaleof value
|
|
check $% > offset
|
|
jno done
|
|
compute offset, offset - ELF.SECTION_OFFSET
|
|
local Rel
|
|
compute Rel, ELF.RELOCATION_INDEX * sizeof Elf32_Rel
|
|
asm store offset at ELF.relocations : Rel + Elf32_Rel.r_offset
|
|
asm store info at ELF.relocations : Rel + Elf32_Rel.r_info
|
|
compute ELF.RELOCATION_INDEX, ELF.RELOCATION_INDEX + 1
|
|
done:
|
|
end calminstruction
|
|
|
|
postpone
|
|
purge section?
|
|
section
|
|
namespace ELF
|
|
|
|
SECTION_NAME_TABLE_SIZE := SECTION_NAME_POSITION
|
|
STRING_TABLE_SIZE := STRING_POSITION
|
|
|
|
NUMBER_OF_SECTION_SYMBOLS := SECTION_SYMBOL_INDEX
|
|
NUMBER_OF_SYMBOLS := SYMBOL_INDEX
|
|
SYMBOL_TABLE_SIZE := NUMBER_OF_SYMBOLS * sizeof Elf32_Sym
|
|
|
|
NUMBER_OF_RELOCATIONS := RELOCATION_INDEX
|
|
rb (-$%) and 11b
|
|
RELOCATIONS_OFFSET = $%
|
|
load byte_sequence : NUMBER_OF_RELOCATIONS * sizeof Elf32_Rel from relocations:0
|
|
db byte_sequence
|
|
|
|
store _symtab at section_table : Elf32_Shdr.sh_name + SECTION_INDEX * sizeof Elf32_Shdr
|
|
store $% at section_table : Elf32_Shdr.sh_offset + SECTION_INDEX * sizeof Elf32_Shdr
|
|
store SYMBOL_TABLE_SIZE at section_table : Elf32_Shdr.sh_size + SECTION_INDEX * sizeof Elf32_Shdr
|
|
store sizeof Elf32_Sym at section_table : Elf32_Shdr.sh_entsize + SECTION_INDEX * sizeof Elf32_Shdr
|
|
store 4 at section_table : Elf32_Shdr.sh_addralign + SECTION_INDEX * sizeof Elf32_Shdr
|
|
store SHT_SYMTAB at section_table : Elf32_Shdr.sh_type + SECTION_INDEX * sizeof Elf32_Shdr
|
|
store STRING_TABLE_SECTION_INDEX at section_table : Elf32_Shdr.sh_link + SECTION_INDEX * sizeof Elf32_Shdr
|
|
store NUMBER_OF_SECTION_SYMBOLS at section_table : Elf32_Shdr.sh_info + SECTION_INDEX * sizeof Elf32_Shdr
|
|
SYMBOL_TABLE_SECTION_INDEX := SECTION_INDEX
|
|
load byte_sequence : SYMBOL_TABLE_SIZE from symbol_table:0
|
|
db byte_sequence
|
|
SECTION_INDEX = SECTION_INDEX + 1
|
|
|
|
store _strtab at section_table : Elf32_Shdr.sh_name + SECTION_INDEX * sizeof Elf32_Shdr
|
|
store $% at section_table : Elf32_Shdr.sh_offset + SECTION_INDEX * sizeof Elf32_Shdr
|
|
store STRING_TABLE_SIZE at section_table : Elf32_Shdr.sh_size + SECTION_INDEX * sizeof Elf32_Shdr
|
|
store 1 at section_table : Elf32_Shdr.sh_addralign + SECTION_INDEX * sizeof Elf32_Shdr
|
|
store SHT_STRTAB at section_table : Elf32_Shdr.sh_type + SECTION_INDEX * sizeof Elf32_Shdr
|
|
STRING_TABLE_SECTION_INDEX := SECTION_INDEX
|
|
load byte_sequence : STRING_TABLE_SIZE from string_table:0
|
|
db byte_sequence
|
|
SECTION_INDEX = SECTION_INDEX + 1
|
|
|
|
assert SECTION_INDEX <= SHN_LORESERVE
|
|
|
|
NUMBER_OF_SECTIONS := SECTION_INDEX
|
|
rb (-$%) and 11b
|
|
SECTION_TABLE_OFFSET := $%
|
|
load byte_sequence : NUMBER_OF_SECTIONS * sizeof Elf32_Shdr from section_table:0
|
|
db byte_sequence
|
|
|
|
end namespace
|
|
end postpone
|