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* Initial versions

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marco 2001-07-24 09:20:06 +00:00
parent c1234a1526
commit 14fddc8bad
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28
utils/dxegen/Makefile.fpc Normal file
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#
# Makefile.fpc for Free Pascal Utils
#
[package]
name=dxegen
version=1.05
[target]
dirs=fpcm tply h2pas fprcp
programs_go32v2=dxegen
[clean]
units=coff
[install]
fpcpackage=y
[default]
fpcdir=../..
[rules]
dxegen$(EXEEXT): dxegen.pp coff$(PPUEXT)
coff$(PPUEXT) : coff.pp

375
utils/dxegen/coff.pp Normal file
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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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utils/dxegen/dxegen.pp Normal file
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{
$Id$
Copyright (C) 1995 Charles Sandmann (sandmann@clio.rice.edu)
This software may be freely distributed with above copyright, no warranty.
Based on code by DJ Delorie, it's really his, enhanced, bugs fixed.
DXEGEN converts COFF object files to .DXE files that can be loaded and
relocated runtime. See (1.0.6+) manual for more details.
Pascal translation, improvements, enhancements
(C) 2001 by Marco van de Voort (Free Pascal member).
}
Uses Strings,DxeLoad,Coff,Dos;
{$ifdef Linux} {Fix for 1.0.x}
{$Define Unix}
{$endif}
Const
{$ifdef Unix}
DirSep = '/';
{$else}
DirSep = '\';
{$endif}
Tempname= 'dxe__tmp.o';
{ This next function is needed for cross-compiling when the machine
isn't little-endian like the i386 }
Type csize_t = cardinal;
Procedure dosswap(vdata:pointer;Const pattern:String);
{ interpretive way of changing structures to bigendian.
Pattern contains the structures. l (32-bit) and s (16-bit) will be swapped,
a char between 1 and 9 skips that much bytes)
Excellent candidate to be converted to something generic that inlines and
isn't interpretive. Until generics, this is the only reusable way.
}
{$ifdef BigEndian}
Var data : pbyte;
c : byte;
i,j : longint;
{$endif}
Begin
{$ifdef BigEndian}
I := 1;
j := length(pattern);
data := pbyte(vdata);
while I< = j Do
Begin
Case Pattern[i] Of
'1'..'9' : inc(data,ord(pattern[i])-ord('0'));
's' :
Begin
c := data[1];
data[1] := data[0];
data[0] := c;
inc(data,2);
End;
'l' :
Begin
c := data[3];
data[3] := data[0];
data[0] := c;
c := data[1];
data[1] := data[2];
data[2] := c;
inc(data,4);
// bswap (Data) ?
End
Else
inc(data);
End;
inc(i);
End;
{$endif}
End;
Var blaat : pointer;
Procedure exit_cleanup;
Var f: file;
Begin
assign(f,tempname);
{$I-}
erase(f);
{$I+}
exitproc := blaat;
End;
Var
Errors : Longint;
Bss_start : Cardinal; {type "unsigned" ?}
fh : FILHDR;
Input_f,
Output_F : file;
Sc : SCNHDR;
Data,
Strngs : PChar; {strings is not reserved, but not wise to use in C translations}
Sym : ^SYMENT;
Relocs : pRELOC;
Strsz : Longint;
I : csize_t;
Dh : dxe_header;
Command,
Param,
Libdir : ansistring;
Name : pchar;
Tmp : array[0..8] Of char;
Written : Word;
Function fixrelocs(i:longint): preloc; inline;
Begin
fixrelocs := preloc(longint(relocs)+i*SIZEOF(reloc));
End;
Begin
Errors := 0;
Bss_start := 0;
If paramcount<3 Then
Begin
Writeln('Usage: dxegen output.dxe symbol input.o [input2.o ... -lgcc -lc]');
Halt(1);
End;
Assign (input_f,paramstr(3));
Filemode := 0;
{$I-}
Reset(input_f,1);
{$I+}
If IOResult<>0 Then
Begin
Writeln('File: ',ParamStr(3),' couldn''t be opened');
halt(1);
End;
{Read the COFF .O fileheader}
Blockread(input_f,fh,FILHSZ);
dosswap(@fh,'sslllss');
If (fh.f_nscns <>1) And (paramcount>3) Then
Begin
Close(input_f);
{$ifdef DXE_LD}
command := DXE_LD;
{$else}
command := 'ld';
{$endif}
param := '-X -S -r -o '+tempname+' -L';
libdir := getenv('DXE_LD_LIBRARY_PATH');
If libdir<>'' Then
param := param+libdir
Else
Begin
libdir := getenv('DJDIR'); {FPCDIR ?}
If libdir='' Then
Begin
Writeln('Error: neither DXE_LD_LIBRARY_PATH nor DJDIR are set in environment');
Halt(1);
End;
param := param+libdir+dirsep+'lib';
End;
For i:= 3 To ParamCount Do
param := param+' '+paramstr(i);
param := param+' -T dxe.ld ';
Writeln('Executing: "',Command,' ',param,'"');
Exec(Command,Param);
Errors := DosExitCode;
If Errors<>0 Then
Begin
Writeln('Dos returned errorcode: ',Errors);
Halt(Errors);
End;
Assign(input_f,tempname);
FileMode := 0;
{$I-}
Reset(Input_f,1);
{$I+}
If IOresult<>0 Then
Begin
Close(input_f);
Writeln('couldn''t open file: '+tempname);
halt(1);
End
Else
Begin
blaat := exitproc;
exitproc := @exit_cleanup;
End;
blockread(input_f,fh,FILHSZ);
dosswap(@fh, 'sslllss');
If (fh.f_nscns <>1) Then
Begin
Close(input_f);
Writeln('Error: input file has more than one section; use -M for map');
halt(1);
End;
End;
seek(input_f,FilePos(Input_f)+fh.f_opthdr);
BlockRead(input_f,sc,SCNHSZ);
dosswap(@sc, '8llllllssl');
dh.magic := DXE_MAGIC;
dh.symbol_offset := -1;
dh.element_size := sc.s_size;
dh.nrelocs := sc.s_nreloc;
Getmem(Data,sc.s_size);
Seek(input_f,sc.s_scnptr);
BlockRead(input_f,data^, sc.s_size);
Getmem(sym,sizeof(SYMENT)*fh.f_nsyms);
Seek(input_f,fh.f_symptr);
Blockread(input_f,sym^,fh.f_nsyms*SYMESZ);
Blockread(input_f,strsz,4);
Dosswap(@strsz,'l');
Getmem(Strngs,strsz);
Blockread(input_f,strngs[4],strsz-4);
plongint(strsz)[0] := 0; // {?}
For i:=0 To fh.f_nsyms-1 Do
Begin
If (sym[i].e.e.e_zeroes<>0) Then
Begin
dosswap(@sym[i], '8lscc');
move(sym[i].e.e_name,tmp,8);
tmp[8] := #0;
name := @tmp;
End
Else
Begin
dosswap(@sym[i], 'lllscc');
name := strngs + sym[i].e.e.e_offset;
End;
If (sym[i].e_scnum = 0) Then
Begin
Writeln('Error: object contains unresolved external symbols (', name,')');
inc(errors);
End;
If (strlcomp(name, argv[2], strlen(argv[2])) = 0) Then
Begin
If (dh.symbol_offset <> -1) Then
Begin
Writeln('Error: multiple symbols that start with ',paramstr(2),' (',name,
')!');
Inc(errors);
End;
dh.symbol_offset := sym[i].e_value;
End
Else If (strcomp(name, '.bss') = 0) And (bss_start=0) Then
Begin
bss_start := sym[i].e_value;
Fillchar(data[bss_start], sc.s_size - bss_start,#0);
End;
Inc(i,sym[i].e_numaux);
End;
If (dh.symbol_offset = -1) Then
Begin
Writeln('Error: symbol ',argv[2],' not found!');
Inc(Errors);
End;
Getmem(Relocs,sizeof(RELOC)*sc.s_nreloc);
seek(input_f, sc.s_relptr);
Blockread (input_f,relocs^,sc.s_nreloc*RELSZ);;
Close(input_f);
If errors>0 Then
Begin
Writeln(' Errors: ',Errors);
Halt(Errors);
End;
Assign(Output_F,argv[1]);
{$I-}
Rewrite(output_f,1);
{$I+}
If Ioresult<>0 Then
Begin
Writeln('can''t write file ',argv[1]);
Halt(1);
End;
If sc.s_nreloc<>0 Then
For I:=0 To sc.s_nreloc-1 Do
Begin
If (fixrelocs(i)^.r_type And 255)=$14 Then
Dec(dh.nrelocs); { Don't do these, they are relative }
End;
Dosswap(@dh,'llll');
Dosswap(@dh, 'llll');
BlockWrite(output_f,dh,sizeof(dh));
Blockwrite(output_f,data^,sc.s_size,I);
If sc.s_nreloc<>0 Then
For I:=0 To sc.s_nreloc-1 Do
Begin
If (fixrelocs(i)^.r_type And 255)<>$14 Then
blockwrite(output_f,fixrelocs(i)^.r_vaddr , 4,written);
End;
Close(output_f);
End.
{
$Log:
}