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{ Copyright (C) 1995 DJ Delorie, see COPYING.DJ for details
( MvdV: GPL/LGPL, I can't exactly make out from that file what this is, and
it doesn't matter for me, since FPC is also GPL/LGPL)
FPC Pascal conversion by Marco van de Voort (C) 2001.
}
Unit coff;
interface
{$packrecords C}
type cushort =word;
culong =cardinal;
cshort =integer;
cuchar =byte;
{** coff information for Intel 386/486. }
{********************* FILE HEADER *********************}
TYPE External_FileHDR = Record
f_magic : cushort; { magic number }
f_nscns : cushort; { number of sections }
f_timdat : culong; { time & date stamp }
f_symptr : culong; { file pointer to symtab }
f_nsyms : culong; { number of symtab entries }
f_opthdr : cushort; { sizeof(optional hdr) }
f_flags : cushort; { flags }
end;
{ Bits for f_flags:
* F_RELFLG relocation info stripped from file
* F_EXEC file is executable (no unresolved external references)
* F_LNNO line numbers stripped from file
* F_LSYMS local symbols stripped from file
* F_AR32WR file has byte ordering of an AR32WR machine (e.g. vax)
}
FILHDR = external_filehdr;
Const
F_RELFLG =00001;
F_EXEC =00002;
F_LNNO =00004;
F_LSYMS =00008;
I386MAGIC =$14c;
I386AIXMAGIC =$175;
// I386BADMAG(x) (((x).f_magic!=I386MAGIC) && (x).f_magic!=I386AIXMAGIC)
FILHSZ = sizeof(FILHDR);
{********************* AOUT "OPTIONAL HEADER" *********************}
TYPE AOUTHDR = Record
magic : cushort; { type of file }
vstamp : cushort; { version stamp }
tsize : culong; { text size in bytes, padded to FW bdry}
dsize : culong; { initialized data " " }
bsize : culong; { uninitialized data " " }
entry : culong; { entry pt. }
text_start : culong; { base of text used for this file }
data_start : culong; { base of data used for this file }
end;
gnu_aout = Record
info,
tsize,
dsize,
bsize,
symsize,
entry,
txrel,
dtrel : culong;
end;
const
AOUTSZ =sizeof(AOUTHDR);
OMAGIC =0404; { object files, eg as output }
ZMAGIC =0413; { demand load format, eg normal ld output }
STMAGIC =0401; { target shlib }
SHMAGIC =0443; { host shlib }
{********************* SECTION HEADER *********************}
type external_scnhdr = Record
s_name : array[0..7] OF CHAR; { section name }
s_paddr, { physical address, aliased s_nlib }
s_vaddr, { virtual address }
s_size, { section size }
s_scnptr, { file ptr to raw data for section }
s_relptr, { file ptr to relocation }
s_lnnoptr : culong; { file ptr to line numbers }
s_nreloc, { number of relocation entries }
s_nlnno : cushort; { number of line number entries}
s_flags : culong; { flags }
end;
SCNHDR = external_scnhdr;
const SCNHSZ=sizeof(SCNHDR);
{
* names of "special" sections
}
CONST
special_TEXT ='.text';
special_DATA ='.data';
special_BSS ='.bss';
special_COMMENT ='.comment';
special_LIB ='.lib';
{
* s_flags "type"
}
STYP_TEXT =$20; { section contains text only }
STYP_DATA =$40; { section contains data only }
STYP_BSS =$80; { section contains bss only }
{********************* LINE NUMBERS *********************}
{ 1 line number entry for every "breakpointable" source line in a section.
* Line numbers are grouped on a per function basis; first entry in a function
* grouping will have l_lnno = 0 and in place of physical address will be the
* symbol table index of the function name.
}
type aux_lineno = Packed Record
case boolean of
false:( l_symndx:culong); { function name symbol index, iff l_lnno == 0 }
true:( l_paddr :culong); { (physical) address of line number }
end;
external_lineno = packed record {should be 6 bytes, check!}
l_addr : aux_lineno;
l_lnno : cushort; { line number }
end;
lineno=external_lineno;
const LINESZ =sizeof(LINENO);
{********************* SYMBOLS *********************}
E_SYMNMLEN =8; { # characters in a symbol name }
E_FILNMLEN =14; { # characters in a file name }
E_DIMNUM =4; { # array dimensions in auxiliary entry }
type aux_aux_external_syment = packed record
e_zeroes : culong;
e_offset : culong;
end;
aux_external_syment = packed record
case boolean of
false: (e_name : array[0..E_SYMNMLEN-1] OF Char);
true : (e:aux_aux_external_syment);
end;
external_syment = packed record {packed, check if necessary!}
e : aux_external_syment;
e_value : culong;
e_scnum : cshort;
e_type : cushort;
e_sclass : cuchar;
e_numaux : cuchar;
end;
CONST
N_BTMASK =$F;
N_TMASK =$30;
N_BTSHFT =$4;
N_TSHIFT =$2;
type tx_lnsz = packed record
x_lnno,
x_size : cushort;
end;
tx_misc = packed record
case boolean of
false : (x_lnsz : tx_lnsz);
true : (x_fsize : culong);
end;
tx_fcn = packed record
x_lnnoptr,
x_endndx : culong;
end;
tx_ary = packed record
x_dimen : array[0..E_DIMNUM-1] OF cushort;
end;
tx_fcnary = packed record
case boolean of
false : ( x_fcn : tx_fcn);
true : ( x_ary : tx_ary);
end;
tx_sym = packed record
x_tagndx : culong;
x_misc : tx_misc;
x_fcnary : tx_fcnary;
x_tvndx : cushort;
end;
tx_n = packed record
x_zeroes,
x_offset : culong;
end;
tx_file = packed record
case boolean of
false: ( x_fname : array [0..E_FILNMLEN-1] of char);
true : (x_n : tx_n);
end;
tx_scn = packed record
x_scnlen : culong;
x_nreloc,
x_nlinno : cushort;
end;
tx_tv = packed record
x_tvfill : culong;
x_tvlen : cushort;
x_tvran : array[0..1] of cushort;
end;
external_auxent = packed record
case byte of
0: (x_sym : tx_sym);
1: (x_file: tx_file);
2: (x_scn : tx_scn);
3: (x_tv : tx_tv);
end;
SYMENT= external_syment;
AUXENT= external_auxent;
const
SYMESZ = SIZEOF(SYMENT);
AUXESZ = SIZEOF(AUXENT);
{ define _ETEXT "etext"}
{ Relocatable symbols have number of the section in which they are defined,
or one of the following: }
N_UNDEF = 0; { undefined symbol }
N_ABS =-1; { value of symbol is absolute }
N_DEBUG =-2; { debugging symbol -- value is meaningless }
N_TV =-3; { indicates symbol needs preload transfer vector }
P_TV =-4; { indicates symbol needs postload transfer vector}
{
* Type of a symbol, in low N bits of the word
}
T_NULL =0;
T_VOID =1; { function argument (only used by compiler) }
T_CHAR =2; { character }
T_SHORT =3; { short integer }
T_INT =4; { integer }
T_LONG =5; { long integer }
T_FLOAT =6; { floating point }
T_DOUBLE =7; { double word }
T_STRUCT =8; { structure }
T_UNION =9; { union }
T_ENUM =10; { enumeration }
T_MOE =11; { member of enumeration}
T_UCHAR =12; { unsigned character }
T_USHORT =13; { unsigned short }
T_UINT =14; { unsigned integer }
T_ULONG =15; { unsigned long }
T_LNGDBL =16; { long double }
{
* derived types, in n_type
}
DT_NON =0; { no derived type }
DT_PTR =1; { pointer }
DT_FCN =2; { function }
DT_ARY =3; { array }
{
\\ BTYPE(x) ((x) & N_BTMASK)
\\ ISPTR(x) (((x) & N_TMASK) == (DT_PTR << N_BTSHFT))
\\ ISFCN(x) (((x) & N_TMASK) == (DT_FCN << N_BTSHFT))
\\ ISARY(x) (((x) & N_TMASK) == (DT_ARY << N_BTSHFT))
\\ ISTAG(x) ((x)==C_STRTAG||(x)==C_UNTAG||(x)==C_ENTAG)
\\ DECREF(x) ((((x)>>N_TSHIFT)&~N_BTMASK)|((x)&N_BTMASK))
}
{********************* STORAGE CLASSES *********************}
{ This used to be defined as -1, but now n_sclass is unsigned. }
C_EFCN =$ff; { physical end of function }
C_NULL =0;
C_AUTO =1; { automatic variable }
C_EXT =2; { external symbol }
C_STAT =3; { static }
C_REG =4; { register variable }
C_EXTDEF =5; { external definition }
C_LABEL =6; { label }
C_ULABEL =7; { undefined label }
C_MOS =8; { member of structure }
C_ARG =9; { function argument }
C_STRTAG =10; { structure tag }
C_MOU =11; { member of union }
C_UNTAG =12; { union tag }
C_TPDEF =13; { type definition }
C_USTATIC =14; { undefined static }
C_ENTAG =15; { enumeration tag }
C_MOE =16; { member of enumeration }
C_REGPARM =17; { register parameter }
C_FIELD =18; { bit field }
C_AUTOARG =19; { auto argument }
C_LASTENT =20; { dummy entry (end of block) }
C_BLOCK =100; { ".bb" or ".eb" }
C_FCN =101; { ".bf" or ".ef" }
C_EOS =102; { end of structure }
C_FILE =103; { file name }
C_LINE =104; { line # reformatted as symbol table entry }
C_ALIAS =105; { duplicate tag }
C_HIDDEN =106; { ext symbol in dmert public lib }
{********************* RELOCATION DIRECTIVES *********************}
type external_reloc = packed record
r_vaddr,
r_symndx : culong;
r_type : cushort;
end;
RELOC = external_reloc;
PRELOC= ^RELOC; {not in original header}
const
RELSZ =sizeof(RELOC);
RELOC_REL32 =20; { 32-bit PC-relative address }
RELOC_ADDR32 =6; { 32-bit absolute address }
DEFAULT_DATA_SECTION_ALIGNMENT =4;
DEFAULT_BSS_SECTION_ALIGNMENT =4;
DEFAULT_TEXT_SECTION_ALIGNMENT =4;
{ For new sections we havn't heard of before }
DEFAULT_SECTION_ALIGNMENT =4;
Implementation
end.
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