namazso · January 13, 2022 20:41 · Jan 13, 2022
diff --git a/coff.ksy b/coff.ksy
@@ -0,0 +1,202 @@
+meta:
+  id: coff
+  title: Common Object Format File
+  file-extension:
+    - obj
+  license: CC0-1.0
+  ks-version: 0.9
+  endian: le
+doc-ref: https://wiki.osdev.org/COFF
+seq:
+  - id: coff_hdr
+    type: coff_header
+  - id: optional_hdr
+    type: optional_header
+    if: coff_hdr.size_of_optional_header != 0
+    size: coff_hdr.size_of_optional_header
+  - id: sections
+    repeat: expr
+    repeat-expr: coff_hdr.number_of_sections
+    type: section
+types:
+  coff_header:
+    seq:
+      - id: machine
+        type: u2
+        enum: machine_type
+      - id: number_of_sections
+        type: u2
+      - id: time_date_stamp
+        type: u4
+      - id: pointer_to_symbol_table
+        type: u4
+      - id: number_of_symbols
+        type: u4
+      - id: size_of_optional_header
+        type: u2
+      - id: characteristics
+        type: u2
+    instances:
+      symbol_table_size:
+        value: number_of_symbols * 18
+      symbol_name_table_offset:
+        value: pointer_to_symbol_table + symbol_table_size
+      symbol_name_table_size:
+        pos: symbol_name_table_offset
+        type: u4
+      symbol_table:
+        pos: pointer_to_symbol_table
+        type: coff_symbol
+        repeat: expr
+        repeat-expr: number_of_symbols
+    enums:
+      machine_type:
+        # 3.3.1. Machine Types
+        0x0: unknown
+        0x1d3: am33
+        0x8664: amd64
+        0x1c0: arm
+        0xaa64: arm64
+        0x1c4: armnt
+        0xebc: ebc
+        0x14c: i386
+        0x200: ia64
+        0x9041: m32r
+        0x266: mips16
+        0x366: mipsfpu
+        0x466: mipsfpu16
+        0x1f0: powerpc
+        0x1f1: powerpcfp
+        0x166: r4000
+        0x5032: riscv32
+        0x5064: riscv64
+        0x5128: riscv128
+        0x1a2: sh3
+        0x1a3: sh3dsp
+        0x1a6: sh4
+        0x1a8: sh5
+        0x1c2: thumb
+        0x169: wcemipsv2
+        # Not mentioned in Microsoft documentation, but widely regarded
+        0x184: alpha
+  optional_header:
+    seq:
+      - id: magic
+        type: u2
+      - id: vstamp
+        type: u2
+      - id: text_size
+        type: u4
+      - id: data_size
+        type: u4
+      - id: bss_size
+        type: u4
+      - id: entry_point
+        type: u4
+      - id: text_start
+        type: u4
+      - id: data_start
+        type: u4
+  coff_symbol:
+    -webide-representation: '{name_annoying.name}'
+    seq:
+      - id: name_annoying
+        type: annoyingstring
+        size: 8
+      #- id: name_zeroes
+      #  type: u4
+      #- id: name_offset
+      #  type: u4
+      - id: value
+        type: u4
+      - id: section_number
+        type: u2
+      - id: type
+        type: u2
+      - id: storage_class
+        type: u1
+      - id: number_of_aux_symbols
+        type: u1
+    instances:
+      #effective_name: 
+      #  value: name_zeroes == 0 ? name_from_offset : '"fixme"'
+      #name_from_offset:
+      #  io: _root._io
+      #  pos: name_zeroes == 0 ? _parent.symbol_name_table_offset + name_offset : 0
+      #  type: str
+      #  terminator: 0
+      #  encoding: ascii
+      section:
+        value: _root.sections[section_number - 1]
+      data:
+        pos: section.pointer_to_raw_data + value
+        size: 1
+  coff_reloc:
+    seq:
+      - id: vaddr
+        type: u4
+      - id: symndx
+        type: u4
+      - id: type
+        type: u2
+  annoyingstring:
+    -webide-representation: '{name}'
+    instances:
+      name_zeroes:
+        pos: 0
+        type: u4
+      name_offset:
+        pos: 4
+        type: u4
+      name_from_offset:
+        io: _root._io
+        pos: 'name_zeroes == 0 ? _parent._parent.symbol_name_table_offset + name_offset : 0'
+        type: str
+        terminator: 0
+        encoding: ascii
+        eos-error: false
+        if: name_zeroes == 0
+      name_from_short:
+        pos: 0
+        type: str
+        terminator: 0
+        encoding: ascii
+        eos-error: false
+        if: name_zeroes != 0
+      name:
+        value: 'name_zeroes == 0 ? name_from_offset : name_from_short'
+  section:
+    -webide-representation: "{name}"
+    seq:
+      - id: name
+        type: str
+        encoding: UTF-8
+        size: 8
+        pad-right: 0
+      - id: virtual_size
+        type: u4
+      - id: virtual_address
+        type: u4
+      - id: size_of_raw_data
+        type: u4
+      - id: pointer_to_raw_data
+        type: u4
+      - id: pointer_to_relocations
+        type: u4
+      - id: pointer_to_linenumbers
+        type: u4
+      - id: number_of_relocations
+        type: u2
+      - id: number_of_linenumbers
+        type: u2
+      - id: characteristics
+        type: u4
+    instances:
+      body:
+        pos: pointer_to_raw_data
+        size: size_of_raw_data
+      relocs:
+        pos: pointer_to_relocations
+        repeat: expr
+        repeat-expr: number_of_relocations
+        type: coff_reloc