385 lines
7.6 KiB
Plaintext
385 lines
7.6 KiB
Plaintext
(*
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BSD 2-Clause License
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Copyright (c) 2018-2019, Anton Krotov
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All rights reserved.
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*)
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MODULE BIN;
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IMPORT LISTS, CHL := CHUNKLISTS, ARITH, UTILS;
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CONST
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RCODE* = 0; PICCODE* = RCODE + 1;
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RDATA* = 2; PICDATA* = RDATA + 1;
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RBSS* = 4; PICBSS* = RBSS + 1;
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RIMP* = 6; PICIMP* = RIMP + 1;
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IMPTAB* = 8;
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TYPE
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RELOC* = POINTER TO RECORD (LISTS.ITEM)
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opcode*: INTEGER;
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offset*: INTEGER
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END;
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IMPRT* = POINTER TO RECORD (LISTS.ITEM)
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nameoffs*: INTEGER;
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label*: INTEGER;
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OriginalFirstThunk*,
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FirstThunk*: INTEGER
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END;
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EXPRT* = POINTER TO RECORD (LISTS.ITEM)
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nameoffs*: INTEGER;
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label*: INTEGER
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END;
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PROGRAM* = POINTER TO RECORD
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code*: CHL.BYTELIST;
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data*: CHL.BYTELIST;
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labels: CHL.INTLIST;
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bss*: INTEGER;
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stack*: INTEGER;
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vmajor*,
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vminor*: WCHAR;
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modname*: INTEGER;
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import*: CHL.BYTELIST;
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export*: CHL.BYTELIST;
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rel_list*: LISTS.LIST;
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imp_list*: LISTS.LIST;
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exp_list*: LISTS.LIST
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END;
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PROCEDURE create* (NumberOfLabels: INTEGER): PROGRAM;
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VAR
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program: PROGRAM;
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i: INTEGER;
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BEGIN
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NEW(program);
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program.bss := 0;
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program.labels := CHL.CreateIntList();
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FOR i := 0 TO NumberOfLabels - 1 DO
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CHL.PushInt(program.labels, 0)
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END;
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program.rel_list := LISTS.create(NIL);
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program.imp_list := LISTS.create(NIL);
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program.exp_list := LISTS.create(NIL);
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program.data := CHL.CreateByteList();
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program.code := CHL.CreateByteList();
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program.import := CHL.CreateByteList();
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program.export := CHL.CreateByteList()
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RETURN program
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END create;
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PROCEDURE SetParams* (program: PROGRAM; bss, stack: INTEGER; vmajor, vminor: WCHAR);
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BEGIN
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program.bss := bss;
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program.stack := stack;
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program.vmajor := vmajor;
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program.vminor := vminor
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END SetParams;
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PROCEDURE PutReloc* (program: PROGRAM; opcode: INTEGER);
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VAR
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cmd: RELOC;
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BEGIN
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NEW(cmd);
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cmd.opcode := opcode;
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cmd.offset := CHL.Length(program.code);
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LISTS.push(program.rel_list, cmd)
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END PutReloc;
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PROCEDURE PutData* (program: PROGRAM; b: BYTE);
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BEGIN
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CHL.PushByte(program.data, b)
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END PutData;
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PROCEDURE get32le* (array: CHL.BYTELIST; idx: INTEGER): INTEGER;
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VAR
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i: INTEGER;
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x: INTEGER;
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BEGIN
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x := 0;
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FOR i := 3 TO 0 BY -1 DO
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x := LSL(x, 8) + CHL.GetByte(array, idx + i)
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END;
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IF UTILS.bit_depth = 64 THEN
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x := LSL(x, 16);
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x := LSL(x, 16);
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x := ASR(x, 16);
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x := ASR(x, 16)
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END
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RETURN x
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END get32le;
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PROCEDURE put32le* (array: CHL.BYTELIST; idx: INTEGER; x: INTEGER);
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VAR
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i: INTEGER;
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BEGIN
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FOR i := 0 TO 3 DO
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CHL.SetByte(array, idx + i, UTILS.Byte(x, i))
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END
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END put32le;
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PROCEDURE PutData32LE* (program: PROGRAM; x: INTEGER);
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VAR
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i: INTEGER;
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BEGIN
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FOR i := 0 TO 3 DO
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CHL.PushByte(program.data, UTILS.Byte(x, i))
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END
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END PutData32LE;
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PROCEDURE PutData64LE* (program: PROGRAM; x: INTEGER);
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VAR
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i: INTEGER;
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BEGIN
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FOR i := 0 TO 7 DO
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CHL.PushByte(program.data, UTILS.Byte(x, i))
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END
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END PutData64LE;
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PROCEDURE PutDataStr* (program: PROGRAM; s: ARRAY OF CHAR);
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VAR
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i: INTEGER;
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BEGIN
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i := 0;
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WHILE s[i] # 0X DO
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PutData(program, ORD(s[i]));
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INC(i)
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END
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END PutDataStr;
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PROCEDURE PutCode* (program: PROGRAM; b: BYTE);
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BEGIN
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CHL.PushByte(program.code, b)
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END PutCode;
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PROCEDURE PutCode32LE* (program: PROGRAM; x: INTEGER);
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VAR
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i: INTEGER;
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BEGIN
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FOR i := 0 TO 3 DO
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CHL.PushByte(program.code, UTILS.Byte(x, i))
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END
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END PutCode32LE;
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PROCEDURE PutCode16LE* (program: PROGRAM; x: INTEGER);
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BEGIN
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CHL.PushByte(program.code, UTILS.Byte(x, 0));
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CHL.PushByte(program.code, UTILS.Byte(x, 1))
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END PutCode16LE;
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PROCEDURE SetLabel* (program: PROGRAM; label, offset: INTEGER);
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BEGIN
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CHL.SetInt(program.labels, label, offset)
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END SetLabel;
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PROCEDURE Import* (program: PROGRAM; name: ARRAY OF CHAR; label: INTEGER);
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VAR
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imp: IMPRT;
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BEGIN
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CHL.PushByte(program.import, 0);
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CHL.PushByte(program.import, 0);
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IF ODD(CHL.Length(program.import)) THEN
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CHL.PushByte(program.import, 0)
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END;
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NEW(imp);
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imp.nameoffs := CHL.PushStr(program.import, name);
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imp.label := label;
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LISTS.push(program.imp_list, imp)
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END Import;
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PROCEDURE less (bytes: CHL.BYTELIST; a, b: EXPRT): BOOLEAN;
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VAR
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i, j: INTEGER;
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BEGIN
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i := a.nameoffs;
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j := b.nameoffs;
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WHILE (CHL.GetByte(bytes, i) # 0) & (CHL.GetByte(bytes, j) # 0) &
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(CHL.GetByte(bytes, i) = CHL.GetByte(bytes, j)) DO
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INC(i);
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INC(j)
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END
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RETURN CHL.GetByte(bytes, i) < CHL.GetByte(bytes, j)
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END less;
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PROCEDURE Export* (program: PROGRAM; name: ARRAY OF CHAR; label: INTEGER);
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VAR
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exp, cur: EXPRT;
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BEGIN
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NEW(exp);
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exp.label := CHL.GetInt(program.labels, label);
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exp.nameoffs := CHL.PushStr(program.export, name);
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cur := program.exp_list.first(EXPRT);
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WHILE (cur # NIL) & less(program.export, cur, exp) DO
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cur := cur.next(EXPRT)
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END;
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IF cur # NIL THEN
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IF cur.prev # NIL THEN
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LISTS.insert(program.exp_list, cur.prev, exp)
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ELSE
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LISTS.insertL(program.exp_list, cur, exp)
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END
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ELSE
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LISTS.push(program.exp_list, exp)
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END
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END Export;
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PROCEDURE GetIProc* (program: PROGRAM; n: INTEGER): IMPRT;
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VAR
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import: IMPRT;
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res: IMPRT;
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BEGIN
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import := program.imp_list.first(IMPRT);
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res := NIL;
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WHILE (import # NIL) & (n >= 0) DO
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IF import.label # 0 THEN
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res := import;
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DEC(n)
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END;
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import := import.next(IMPRT)
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END;
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ASSERT(n = -1)
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RETURN res
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END GetIProc;
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PROCEDURE GetLabel* (program: PROGRAM; label: INTEGER): INTEGER;
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RETURN CHL.GetInt(program.labels, label)
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END GetLabel;
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PROCEDURE NewLabel* (program: PROGRAM);
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BEGIN
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CHL.PushInt(program.labels, 0)
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END NewLabel;
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PROCEDURE fixup* (program: PROGRAM);
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VAR
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rel: RELOC;
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imp: IMPRT;
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nproc: INTEGER;
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L: INTEGER;
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BEGIN
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nproc := 0;
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imp := program.imp_list.first(IMPRT);
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WHILE imp # NIL DO
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IF imp.label # 0 THEN
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CHL.SetInt(program.labels, imp.label, nproc);
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INC(nproc)
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END;
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imp := imp.next(IMPRT)
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END;
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rel := program.rel_list.first(RELOC);
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WHILE rel # NIL DO
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IF rel.opcode IN {RIMP, PICIMP} THEN
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L := get32le(program.code, rel.offset);
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put32le(program.code, rel.offset, GetLabel(program, L))
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END;
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rel := rel.next(RELOC)
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END
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END fixup;
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PROCEDURE InitArray* (VAR array: ARRAY OF BYTE; VAR idx: INTEGER; hex: ARRAY OF CHAR);
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VAR
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i, k: INTEGER;
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PROCEDURE hexdgt (dgt: CHAR): INTEGER;
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VAR
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res: INTEGER;
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BEGIN
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IF dgt < "A" THEN
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res := ORD(dgt) - ORD("0")
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ELSE
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res := ORD(dgt) - ORD("A") + 10
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END
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RETURN res
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END hexdgt;
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BEGIN
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k := LENGTH(hex);
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ASSERT(~ODD(k));
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k := k DIV 2;
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FOR i := 0 TO k - 1 DO
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array[i + idx] := hexdgt(hex[2 * i]) * 16 + hexdgt(hex[2 * i + 1])
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END;
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INC(idx, k)
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END InitArray;
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END BIN. |