Question

.equ Statements with GNU Assembler

Asked by: apx_31088

    I'm using GAWK to automate the conversion of lots of assembly language source files written for the Phar386 assembler to they can be recompiled with the GNU assembler.  So far, things are generally going fine!
     I have three statements that have been encountered that I'm researching how to convert from Phar386 to GNU:

ml_variable_scrn  EQU      "000,000,192,240"       ;these are the Phar386 versions
ml_adv_msg_scrn   EQU      "000,240,192,016"
ml_fixed_scrn     EQU      "000,256,192,064"

.equ      ml_variable_scrn,"000,000,192,240"     ;these are the same lines after the automated tool conversion
.equ      ml_adv_msg_scrn,"000,240,192,016"           
.equ      ml_fixed_scrn,"000,256,192,064"       

When the second set of lines are compiled using the GNU Assembler, each of the three lines produces these two warnings:
     "Error: bad expression"
     "Error: junk at end of line, first unrecognized character is '0'

How to convert the first set of three lines so that will peform correctly when compiled with the GNU Assembler?

Quick and good answers are needed and will be highly appreciated!
How can the

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Asked On
2006-11-14 at 12:17:36ID22060521
Tags

gnu

,

assembler

,

equ

Topic

Assembly Programming Language

Participating Experts
1
Points
500
Comments
3

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Answers

 

by: dimitryPosted on 2006-11-15 at 07:13:37ID: 17947531

I think this is because of "string"...
I would suggest to use next trick:
1) Rename your file from myfile.s to myfile.S
2) Change lines to
#define ml_variable_scrn    "000,000,192,240"
#define ml_adv_msg_scrn  "000,240,192,016"          
#define ml_fixed_scrn        "000,256,192,064"
3) Compile myfile.S with gcc, so gcc will take care of #define stuff...

If it will not work then you'll need to show us how these defines are used in code so we will help you to convert it to gnu assembler.

 

by: apx_31088Posted on 2006-11-16 at 09:51:33ID: 17958109

dimitry,

     These three .equ statements are part of an assembly language file that contains nothing but about 300 .equ statements.  These three statements are the only .equ statements that contain data within quotations ("000,000,192,240", etc).  The rest of the .equ statements are in the form:

.equ      ml_sline_24,131
.equ      ml_sline_25,123
.equ      ml_sline_26,115

     A coworker had earlier mentioned mentioned using gcc to pre-process the literal string assignments in the manner that you'd written about.  What is an example of an assembly source file that contains both the #define statements and also contains assembly language statements?  What are the steps needed to process that assembly source file so that it is processed by both gcc and as?

 

by: dimitryPosted on 2006-11-16 at 10:38:52ID: 17958481

I've already written that you need to rename myfile.s to myfile.S
And just use gcc instead of as. as flags you can pass by -Wa,special_as_flags.
The only problem you can face is other .equ will not be accepted by gcc. Then use #define...

20120131-EE-VQP-002

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