kolibrios/programs/develop/oberon07/Source/KOS.ob07

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(*
BSD 2-Clause License
Copyright (c) 2018, 2019, Anton Krotov
All rights reserved.
*)
MODULE KOS;
IMPORT BIN, WR := WRITER, LISTS, CHL := CHUNKLISTS;
CONST
HEADER_SIZE = 36;
SIZE_OF_DWORD = 4;
TYPE
FILE = WR.FILE;
HEADER = RECORD
menuet01: ARRAY 9 OF CHAR;
ver, start, size, mem, sp, param, path: INTEGER
END;
PROCEDURE align (n, _align: INTEGER): INTEGER;
BEGIN
IF n MOD _align # 0 THEN
n := n + _align - (n MOD _align)
END
RETURN n
END align;
PROCEDURE Import* (program: BIN.PROGRAM; idata: INTEGER; VAR ImportTable: CHL.INTLIST; VAR len, libcount, size: INTEGER);
VAR
i: INTEGER;
import: BIN.IMPRT;
BEGIN
libcount := 0;
import := program.imp_list.first(BIN.IMPRT);
WHILE import # NIL DO
IF import.label = 0 THEN
INC(libcount)
END;
import := import.next(BIN.IMPRT)
END;
len := libcount * 2 + 2;
size := (LISTS.count(program.imp_list) + len + 1) * SIZE_OF_DWORD;
ImportTable := CHL.CreateIntList();
FOR i := 0 TO size DIV SIZE_OF_DWORD - 1 DO
CHL.PushInt(ImportTable, 0)
END;
i := 0;
import := program.imp_list.first(BIN.IMPRT);
WHILE import # NIL DO
IF import.label = 0 THEN
CHL.SetInt(ImportTable, len, 0);
INC(len);
CHL.SetInt(ImportTable, i, idata + len * SIZE_OF_DWORD);
INC(i);
CHL.SetInt(ImportTable, i, import.nameoffs + size + idata);
INC(i)
ELSE
CHL.SetInt(ImportTable, len, import.nameoffs + size + idata);
import.label := len * SIZE_OF_DWORD;
INC(len)
END;
import := import.next(BIN.IMPRT)
END;
CHL.SetInt(ImportTable, len, 0);
CHL.SetInt(ImportTable, i, 0);
CHL.SetInt(ImportTable, i + 1, 0);
INC(len);
size := size + CHL.Length(program.import)
END Import;
PROCEDURE write* (program: BIN.PROGRAM; FileName: ARRAY OF CHAR);
CONST
PARAM_SIZE = 2048;
FileAlignment = 16;
VAR
header: HEADER;
base, text, data, idata, bss: INTEGER;
reloc: BIN.RELOC;
iproc: BIN.IMPRT;
L: INTEGER;
delta: INTEGER;
i: INTEGER;
File: FILE;
ImportTable: CHL.INTLIST;
ILen, libcount, isize: INTEGER;
icount, dcount, ccount: INTEGER;
BEGIN
base := 0;
icount := CHL.Length(program.import);
dcount := CHL.Length(program.data);
ccount := CHL.Length(program.code);
text := base + HEADER_SIZE;
data := align(text + ccount, FileAlignment);
idata := align(data + dcount, FileAlignment);
Import(program, idata, ImportTable, ILen, libcount, isize);
bss := align(idata + isize, FileAlignment);
header.menuet01 := "MENUET01";
header.ver := 1;
header.start := text;
header.size := idata + isize - base;
header.mem := align(header.size + program.stack + program.bss + PARAM_SIZE * 2 + 4096, FileAlignment);
header.sp := base + header.mem - PARAM_SIZE * 2;
header.param := header.sp;
header.path := header.param + PARAM_SIZE;
reloc := program.rel_list.first(BIN.RELOC);
WHILE reloc # NIL DO
L := BIN.get32le(program.code, reloc.offset);
delta := 3 - reloc.offset - text;
CASE reloc.opcode OF
|BIN.RIMP:
iproc := BIN.GetIProc(program, L);
BIN.put32le(program.code, reloc.offset, idata + iproc.label)
|BIN.RBSS:
BIN.put32le(program.code, reloc.offset, L + bss)
|BIN.RDATA:
BIN.put32le(program.code, reloc.offset, L + data)
|BIN.RCODE:
BIN.put32le(program.code, reloc.offset, BIN.GetLabel(program, L) + text)
|BIN.PICDATA:
BIN.put32le(program.code, reloc.offset, L + data + delta)
|BIN.PICCODE:
BIN.put32le(program.code, reloc.offset, BIN.GetLabel(program, L) + text + delta)
|BIN.PICBSS:
BIN.put32le(program.code, reloc.offset, L + bss + delta)
|BIN.PICIMP:
iproc := BIN.GetIProc(program, L);
BIN.put32le(program.code, reloc.offset, idata + iproc.label + delta)
|BIN.IMPTAB:
BIN.put32le(program.code, reloc.offset, idata + delta)
END;
reloc := reloc.next(BIN.RELOC)
END;
File := WR.Create(FileName);
FOR i := 0 TO 7 DO
WR.WriteByte(File, ORD(header.menuet01[i]))
END;
WR.Write32LE(File, header.ver);
WR.Write32LE(File, header.start);
WR.Write32LE(File, header.size);
WR.Write32LE(File, header.mem);
WR.Write32LE(File, header.sp);
WR.Write32LE(File, header.param);
WR.Write32LE(File, header.path);
CHL.WriteToFile(File, program.code);
WR.Padding(File, FileAlignment);
CHL.WriteToFile(File, program.data);
WR.Padding(File, FileAlignment);
FOR i := 0 TO ILen - 1 DO
WR.Write32LE(File, CHL.GetInt(ImportTable, i))
END;
CHL.WriteToFile(File, program.import);
WR.Close(File)
END write;
END KOS.