as: File
7.35 '.file'
============
There are two different versions of the '.file' directive. Targets that
support DWARF2 line number information use the DWARF2 version of
'.file'. Other targets use the default version.
Default Version
---------------
This version of the '.file' directive tells 'as' that we are about to
start a new logical file. The syntax is:
.file STRING
STRING is the new file name. In general, the filename is recognized
whether or not it is surrounded by quotes '"'; but if you wish to
specify an empty file name, you must give the quotes-'""'. This
statement may go away in future: it is only recognized to be compatible
with old 'as' programs.
DWARF2 Version
--------------
When emitting DWARF2 line number information, '.file' assigns filenames
to the '.debug_line' file name table. The syntax is:
.file FILENO FILENAME
The FILENO operand should be a unique positive integer to use as the
index of the entry in the table. The FILENAME operand is a C string
literal.
The detail of filename indices is exposed to the user because the
filename table is shared with the '.debug_info' section of the DWARF2
debugging information, and thus the user must know the exact indices
that table entries will have.
Info Catalog
as: Fail
as: Pseudo Ops
as: Fill