Re: Byterun question

From: Xavier Leroy (
Date: Mon Jun 22 1998 - 10:29:39 MET DST

Date: Mon, 22 Jun 1998 10:29:39 +0200
From: Xavier Leroy <>
To: "Michael Sperber [Mr. Preprocessor]" <>,
Subject: Re: Byterun question
In-Reply-To: <>; from Michael Sperber [Mr. Preprocessor] on Tue, Jun 16, 1998 at 04:39:42PM +0200

> byterun/fix_code.c refers to STOP as the instructions with the highest
> opcode all over the place. Yet, byterun/instruct.h list EVENT and
> BREAK after STOP. Could someone illuminate?

My pleasure. The EVENT and BREAK opcodes never occur in a bytecode
executable file. They are inserted by the debugger by run-time
modification of the bytecode. Hence, the program loading code in
byterun/fix_code.c always sees opcodes that are <= STOP.

- Xavier Leroy

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