AS

Section: User Commands (1)
Updated: PDP11
Index Return to Main Contents
 

NAME

as - assembler  

SYNOPSIS

as [ - ] [ -o objfile ] file ...  

DESCRIPTION

As assembles the concatenation of the named files. If the optional first argument - is used, all undefined symbols in the assembly are treated as global.

The output of the assembly is left on the file objfile; if that is omitted, a.out is used. It is executable if no errors occurred during the assembly, and if there were no unresolved external references.  

FILES

/lib/as2     pass 2 of the assembler

/tmp/atm[1-3]? temporary

a.out          object
 

SEE ALSO

ld(1), nm(1), adb(1), a.out(5)
UNIX Assembler Manual by D. M. Ritchie  

DIAGNOSTICS

When an input file cannot be read, its name followed by a question mark is typed and assembly ceases. When syntactic or semantic errors occur, a single-character diagnostic is typed out together with the line number and the file name in which it occurred. Errors in pass 1 cause cancellation of pass 2. The possible errors are:

)  Parentheses error

] Parentheses error

< String not terminated properly

* Indirection used illegally

.Illegal assignment to `.'

a Error in address

b Branch instruction is odd or too remote

e Error in expression

f Error in local (`f' or `b') type symbol

g Garbage (unknown) character

i End of file inside an if

m Multiply defined symbol as label

o Word quantity assembled at odd address

p `.' different in pass 1 and 2

r Relocation error

u Undefined symbol

x Syntax error

 

BUGS

Syntax errors can cause incorrect line numbers in following diagnostics.


 

Index

NAME
SYNOPSIS
DESCRIPTION
FILES
SEE ALSO
DIAGNOSTICS
BUGS

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