128 lines
2.0 KiB
Plaintext
128 lines
2.0 KiB
Plaintext
(*
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BSD 2-Clause License
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Copyright (c) 2020, Anton Krotov
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All rights reserved.
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*)
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MODULE Trap;
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IMPORT SYSTEM;
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PROCEDURE [code] sp* (): INTEGER
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22, 0, 4; (* MOV R0, SP *)
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PROCEDURE [code] syscall* (ptr: INTEGER)
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22, 0, 4, (* MOV R0, SP *)
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27, 0, 4, (* ADD R0, 4 *)
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9, 0, 0, (* LDR32 R0, R0 *)
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80, 0, 0; (* SYSCALL R0 *)
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PROCEDURE Char (c: CHAR);
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VAR
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a: ARRAY 2 OF INTEGER;
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BEGIN
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a[0] := 8;
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a[1] := ORD(c);
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syscall(SYSTEM.ADR(a[0]))
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END Char;
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PROCEDURE String (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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Char(s[i]);
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INC(i)
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END
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END String;
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PROCEDURE PString (ptr: INTEGER);
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VAR
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c: CHAR;
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BEGIN
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SYSTEM.GET(ptr, c);
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WHILE c # 0X DO
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Char(c);
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INC(ptr);
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SYSTEM.GET(ptr, c)
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END
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END PString;
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PROCEDURE Ln;
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BEGIN
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String(0DX + 0AX)
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END Ln;
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PROCEDURE IntToStr (x: INTEGER; VAR str: ARRAY OF CHAR);
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VAR
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i, a: INTEGER;
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BEGIN
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i := 0;
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a := x;
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REPEAT
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INC(i);
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a := a DIV 10
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UNTIL a = 0;
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str[i] := 0X;
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REPEAT
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DEC(i);
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str[i] := CHR(x MOD 10 + ORD("0"));
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x := x DIV 10
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UNTIL x = 0
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END IntToStr;
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PROCEDURE Int (x: INTEGER);
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VAR
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s: ARRAY 32 OF CHAR;
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BEGIN
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IntToStr(x, s);
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String(s)
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END Int;
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PROCEDURE trap* (modnum, _module, err, line: INTEGER);
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VAR
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s: ARRAY 32 OF CHAR;
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BEGIN
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CASE err OF
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| 1: s := "assertion failure"
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| 2: s := "NIL dereference"
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| 3: s := "bad divisor"
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| 4: s := "NIL procedure call"
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| 5: s := "type guard error"
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| 6: s := "index out of range"
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| 7: s := "invalid CASE"
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| 8: s := "array assignment error"
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| 9: s := "CHR out of range"
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|10: s := "WCHR out of range"
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|11: s := "BYTE out of range"
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END;
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Ln;
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String("error ("); Int(err); String("): "); String(s); Ln;
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String("module: "); PString(_module); Ln;
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String("line: "); Int(line); Ln;
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SYSTEM.CODE(0, 0, 0) (* STOP *)
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END trap;
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END Trap. |