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Fix crash on listing when nested noexpand macros are used Macros flagged noexpand were causing a segfault during listing. The problem was incorrect accounting for nesting levels for noexpand macros causing the listing handler to fall off the end of the program in certain circumstances and in other circumstances it would fail to suppress expansion. Both the segfault in the case of misbehaviour and the misbhaviour itself are corrected with this update. If you do not use nested noexpand macros, this bug has no effect.
author William Astle <lost@l-w.ca>
date Sat, 25 May 2013 13:35:46 -0600
parents 0bc1c88fe776
children
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><DIV
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><H1
><A
NAME="AEN45"
></A
>Chapter 3. LWASM</H1
><P
>The LWTOOLS assembler is called LWASM. This chapter documents the various
features of the assembler. It is not, however, a tutorial on 6x09 assembly
language programming.</P
><DIV
CLASS="SECTION"
><H1
CLASS="SECTION"
><A
NAME="AEN48"
>3.1. Command Line Options</A
></H1
><P
>The binary for LWASM is called "lwasm". Note that the binary is in lower
case. lwasm takes the following command line arguments.</P
><P
></P
><DIV
CLASS="VARIABLELIST"
><DL
><DT
><CODE
CLASS="OPTION"
>--6309</CODE
>, <CODE
CLASS="OPTION"
>-3</CODE
></DT
><DD
><P
>This will cause the assembler to accept the additional instructions available
on the 6309 processor. This is the default mode; this option is provided for
completeness and to override preset command arguments.</P
></DD
><DT
><CODE
CLASS="OPTION"
>--6809</CODE
>, <CODE
CLASS="OPTION"
>-9</CODE
></DT
><DD
><P
>This will cause the assembler to reject instructions that are only available
on the 6309 processor.</P
></DD
><DT
><CODE
CLASS="OPTION"
>--decb</CODE
>, <CODE
CLASS="OPTION"
>-b</CODE
></DT
><DD
><P
>Select the DECB output format target. Equivalent to <CODE
CLASS="OPTION"
>--format=decb</CODE
>.</P
><P
>While this is the default output format currently, it is not safe to rely
on that fact. Future versions may have different defaults. It is also trivial
to modify the source code to change the default. Thus, it is recommended to specify
this option if you need DECB output.</P
></DD
><DT
><CODE
CLASS="OPTION"
>--format=type</CODE
>, <CODE
CLASS="OPTION"
>-f type</CODE
></DT
><DD
><P
>Select the output format. Valid values are <CODE
CLASS="OPTION"
>obj</CODE
> for the
object file target, <CODE
CLASS="OPTION"
>decb</CODE
> for the DECB LOADM format,
<CODE
CLASS="OPTION"
>os9</CODE
> for creating OS9 modules, and <CODE
CLASS="OPTION"
>raw</CODE
> for
a raw binary.</P
></DD
><DT
><CODE
CLASS="OPTION"
>--list[=file]</CODE
>, <CODE
CLASS="OPTION"
>-l[file]</CODE
></DT
><DD
><P
>Cause LWASM to generate a listing. If <CODE
CLASS="OPTION"
>file</CODE
> is specified,
the listing will go to that file. Otherwise it will go to the standard output
stream. By default, no listing is generated. Unless <CODE
CLASS="OPTION"
>--symbols</CODE
>
is specified, the list will not include the symbol table.</P
></DD
><DT
><CODE
CLASS="OPTION"
>--symbols</CODE
>, <CODE
CLASS="OPTION"
>-s</CODE
></DT
><DD
><P
>Causes LWASM to generate a list of symbols when generating a listing.
It has no effect unless a listing is being generated.</P
></DD
><DT
><CODE
CLASS="OPTION"
>--obj</CODE
></DT
><DD
><P
>Select the proprietary object file format as the output target.</P
></DD
><DT
><CODE
CLASS="OPTION"
>--output=FILE</CODE
>, <CODE
CLASS="OPTION"
>-o FILE</CODE
></DT
><DD
><P
>This option specifies the name of the output file. If not specified, the
default is <CODE
CLASS="OPTION"
>a.out</CODE
>.</P
></DD
><DT
><CODE
CLASS="OPTION"
>--pragma=pragma</CODE
>, <CODE
CLASS="OPTION"
>-p pragma</CODE
></DT
><DD
><P
>Specify assembler pragmas. Multiple pragmas are separated by commas. The
pragmas accepted are the same as for the PRAGMA assembler directive described
below.</P
></DD
><DT
><CODE
CLASS="OPTION"
>--raw</CODE
>, <CODE
CLASS="OPTION"
>-r</CODE
></DT
><DD
><P
>Select raw binary as the output target.</P
></DD
><DT
><CODE
CLASS="OPTION"
>--includedir=path</CODE
>, <CODE
CLASS="OPTION"
>-I path</CODE
></DT
><DD
><P
>Add <CODE
CLASS="OPTION"
>path</CODE
> to the end of the include path.</P
></DD
><DT
><CODE
CLASS="OPTION"
>--define=SYM[=VAL]</CODE
>, <CODE
CLASS="OPTION"
>-D SYM[=VAL]</CODE
></DT
><DD
><P
>Pre-defines the symbol SYM as either the specified VAL. If VAL is omitted,
the symbol is defined as 1.  The symbol will be defined as though it were
defined using the SET directive in the assembly source.  That means it can
be overridden by a SET directive within the source code.  Attempting to
redefine SYM using EQU will result in a multiply defined symbol error.</P
></DD
><DT
><CODE
CLASS="OPTION"
>--help</CODE
>, <CODE
CLASS="OPTION"
>-?</CODE
></DT
><DD
><P
>Present a help screen describing the command line options.</P
></DD
><DT
><CODE
CLASS="OPTION"
>--usage</CODE
></DT
><DD
><P
>Provide a summary of the command line options.</P
></DD
><DT
><CODE
CLASS="OPTION"
>--version</CODE
>, <CODE
CLASS="OPTION"
>-V</CODE
></DT
><DD
><P
>Display the software version.</P
></DD
><DT
><CODE
CLASS="OPTION"
>--debug</CODE
>, <CODE
CLASS="OPTION"
>-d</CODE
></DT
><DD
><P
>Increase the debugging level. Only really useful to people hacking on the
LWASM source code itself.</P
></DD
></DL
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