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-- COFF definitions.
-- Copyright (C) 2006 Tristan Gingold
--
-- This program is free software: you can redistribute it and/or modify
-- it under the terms of the GNU General Public License as published by
-- the Free Software Foundation, either version 2 of the License, or
-- (at your option) any later version.
--
-- This program is distributed in the hope that it will be useful,
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-- GNU General Public License for more details.
--
-- You should have received a copy of the GNU General Public License
-- along with this program. If not, see <gnu.org/licenses>.
with Interfaces; use Interfaces;
with System; use System;
package Coff is
type Filehdr is record
F_Magic : Unsigned_16; -- Magic number.
F_Nscns : Unsigned_16; -- Number of sections.
F_Timdat : Unsigned_32; -- Time and date stamp.
F_Symptr : Unsigned_32; -- File pointer to symtab.
F_Nsyms : Unsigned_32; -- Number of symtab entries.
F_Opthdr : Unsigned_16; -- Size of optionnal header.
F_Flags : Unsigned_16; -- Flags;
end record;
-- Size of Filehdr.
Filehdr_Size : constant Natural := Filehdr'Size / Storage_Unit;
-- Magic numbers.
I386magic : constant Unsigned_16 := 16#014c#;
-- Flags of file header.
-- Relocation info stripped from file.
F_Relflg : constant Unsigned_16 := 16#0001#;
-- File is executable (no unresolved symbols).
F_Exec : constant Unsigned_16 := 16#0002#;
-- Line numbers stripped from file.
F_Lnno : constant Unsigned_16 := 16#0004#;
-- Local symbols stripped from file.
F_Lsyms : constant Unsigned_16 := 16#0008#;
type Scnhdr is record
S_Name : String (1 .. 8); -- Section name.
S_Paddr : Unsigned_32; -- Physical address.
S_Vaddr : Unsigned_32; -- Virtual address.
S_Size : Unsigned_32; -- Section size.
S_Scnptr : Unsigned_32; -- File pointer to raw section data.
S_Relptr : Unsigned_32; -- File pointer to relocation data.
S_Lnnoptr : Unsigned_32; -- File pointer to line number data.
S_Nreloc : Unsigned_16; -- Number of relocation entries.
S_Nlnno : Unsigned_16; -- Number of line number entries.
S_Flags : Unsigned_32; -- Flags.
end record;
Scnhdr_Size : constant Natural := Scnhdr'Size / Storage_Unit;
-- section contains text only.
STYP_TEXT : constant Unsigned_32 := 16#0020#;
-- section contains data only.
STYP_DATA : constant Unsigned_32 := 16#0040#;
-- section contains bss only.
STYP_BSS : constant Unsigned_32 := 16#0080#;
type Strent_Type is record
E_Zeroes : Unsigned_32;
E_Offset : Unsigned_32;
end record;
type Sym_Name (Inline : Boolean := True) is record
case Inline is
when True =>
E_Name : String (1 .. 8);
when False =>
E : Strent_Type;
end case;
end record;
pragma Unchecked_Union (Sym_Name);
for Sym_Name'Size use 64;
type Syment is record
E : Sym_Name; -- Name of the symbol
E_Value : Unsigned_32; -- Value
E_Scnum : Unsigned_16; -- Section
E_Type : Unsigned_16;
E_Sclass : Unsigned_8;
E_Numaux : Unsigned_8;
end record;
Symesz : constant Natural := 18;
for Syment'Size use Symesz * Storage_Unit;
-- An undefined (extern) symbol.
N_UNDEF : constant Unsigned_16 := 16#00_00#;
-- An absolute symbol (e_value is a constant, not an address).
N_ABS : constant Unsigned_16 := 16#Ff_Ff#;
-- A debugging symbol.
N_DEBUG : constant Unsigned_16 := 16#Ff_Fe#;
C_NULL : constant Unsigned_8 := 0;
C_AUTO : constant Unsigned_8 := 1;
C_EXT : constant Unsigned_8 := 2;
C_STAT : constant Unsigned_8 := 3;
C_REG : constant Unsigned_8 := 4;
C_EXTDEF : constant Unsigned_8 := 5;
C_LABEL : constant Unsigned_8 := 6;
C_ULABEL : constant Unsigned_8 := 7;
C_MOS : constant Unsigned_8 := 8;
C_ARG : constant Unsigned_8 := 9;
C_STRTAG : constant Unsigned_8 := 10;
C_MOU : constant Unsigned_8 := 11;
C_UNTAG : constant Unsigned_8 := 12;
C_TPDEF : constant Unsigned_8 := 13;
C_USTATIC : constant Unsigned_8 := 14;
C_ENTAG : constant Unsigned_8 := 15;
C_MOE : constant Unsigned_8 := 16;
C_REGPARM : constant Unsigned_8 := 17;
C_FIELD : constant Unsigned_8 := 18;
C_AUTOARG : constant Unsigned_8 := 19;
C_LASTENT : constant Unsigned_8 := 20;
C_BLOCK : constant Unsigned_8 := 100;
C_FCN : constant Unsigned_8 := 101;
C_EOS : constant Unsigned_8 := 102;
C_FILE : constant Unsigned_8 := 103;
C_LINE : constant Unsigned_8 := 104;
C_ALIAS : constant Unsigned_8 := 105;
C_HIDDEN : constant Unsigned_8 := 106;
C_EFCN : constant Unsigned_8 := 255;
-- Textual description of sclass.
type Const_String_Acc is access constant String;
type Sclass_Desc_Type is record
Name : Const_String_Acc;
Meaning : Const_String_Acc;
end record;
type Sclass_Desc_Array_Type is array (Unsigned_8) of Sclass_Desc_Type;
Sclass_Desc : constant Sclass_Desc_Array_Type;
type Auxent_File (Inline : Boolean := True) is record
case Inline is
when True =>
X_Fname : String (1 .. 14);
when False =>
X_N : Strent_Type;
end case;
end record;
pragma Unchecked_Union (Auxent_File);
type Auxent_Scn is record
X_Scnlen : Unsigned_32;
X_Nreloc : Unsigned_16;
X_Nlinno : Unsigned_16;
end record;
-- Relocation.
type Reloc is record
R_Vaddr : Unsigned_32;
R_Symndx : Unsigned_32;
R_Type : Unsigned_16;
end record;
Relsz : constant Natural := Reloc'Size / Storage_Unit;
Reloc_Rel32 : constant Unsigned_16 := 20;
Reloc_Addr32 : constant Unsigned_16 := 6;
private
subtype S is String;
Sclass_Desc : constant Sclass_Desc_Array_Type :=
(C_NULL => (new S'("C_NULL"), new S'("No entry")),
C_AUTO => (new S'("C_AUTO"), new S'("Automatic variable")),
C_EXT => (new S'("C_EXT"), new S'("External/public symbol")),
C_STAT => (new S'("C_STAT"), new S'("static (private) symbol")),
C_REG => (new S'("C_REG"), new S'("register variable")),
C_EXTDEF => (new S'("C_EXTDEF"), new S'("External definition")),
C_LABEL => (new S'("C_LABEL"), new S'("label")),
C_ULABEL => (new S'("C_ULABEL"), new S'("undefined label")),
C_MOS => (new S'("C_MOS"), new S'("member of structure")),
C_ARG => (new S'("C_ARG"), new S'("function argument")),
C_STRTAG => (new S'("C_STRTAG"), new S'("structure tag")),
C_MOU => (new S'("C_MOU"), new S'("member of union")),
C_UNTAG => (new S'("C_UNTAG"), new S'("union tag")),
C_TPDEF => (new S'("C_TPDEF"), new S'("type definition")),
C_USTATIC => (new S'("C_USTATIC"), new S'("undefined static")),
C_ENTAG => (new S'("C_ENTAG"), new S'("enumaration tag")),
C_MOE => (new S'("C_MOE"), new S'("member of enumeration")),
C_REGPARM => (new S'("C_REGPARM"), new S'("register parameter")),
C_FIELD => (new S'("C_FIELD"), new S'("bit field")),
C_AUTOARG => (new S'("C_AUTOARG"), new S'("auto argument")),
C_LASTENT => (new S'("C_LASTENT"), new S'("dummy entry (end of block)")),
C_BLOCK => (new S'("C_BLOCK"), new S'("beginning or end of block")),
C_FCN => (new S'("C_FCN"), new S'("beginning or end of function")),
C_EOS => (new S'("C_EOS"), new S'("end of structure")),
C_FILE => (new S'("C_FILE"), new S'("file name")),
C_LINE => (new S'("C_LINE"),
new S'("line number, reformatted as symbol")),
C_ALIAS => (new S'("C_ALIAS"), new S'("duplicate tag")),
C_HIDDEN => (new S'("C_HIDDEN"),
new S'("ext symbol in dmert public lib")),
C_EFCN => (new S'("C_EFCN"), new S'("physical end of function")),
others => (null, null));
end Coff;
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