174
Section 3: Assembler
TI
-
89 / TI
-
92 Plus Sierra C Assembler Reference Manual
Not for Distribution
Beta Version February 2, 2001
.def — Begin Symbol Attribute Block
Syntax
.def
symbol
Description
symbol
Specifies a symbol that is defined in the current assembler source
file or corresponding C source file.
The
.def
directive begins an attribute block for the symbol
symbol
. The
.dim
,
.line
,
.scl
,
.size
,
.tag
,
.type
, and
.val
directives are used to set the various
attributes of a symbol (see section
1.4 Object File Format
). The
.endef
directive
must be used to end an attribute block. For convenience, the directives that
comprise a symbol attribute block can be specified as a backslash-separated list.
The information contained in an attribute block is stored in the object file’s symbol
table for purposes of symbolic debugging. The Sierra C compiler automatically
generates these attribute blocks for all symbols when the
-q
command line flag
is specified. They can be written manually when performing assembler
source-level debugging, but this is not recommended. Adequate debugging
information can be generated with the
-L
assembler command line flag, which
directs the assembler to generate line number information, and with the
.type
directive, which can be used to specify symbol types directly (i.e., without a
symbol attribute block).
Examples
.def init
.val init
.scl 2
.type 0x24
.endef
.def tbl \ .val 12 \ .scl 3 \ .type 0x4 \ .endef
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