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.file
When emitting dwarf2 line number information .file assigns filenames
to the .debug_line file name table. 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.
.loc
fileno
lineno
[
column
] [
options
]
The .loc directive will add row to the .debug_line line
number matrix corresponding to the immediately following assembly
instruction. The fileno, lineno, and optional column
arguments will be applied to the .debug_line state machine before
the row is added.
The options are a sequence of the following tokens in any order:
basic_block
This option will set the basic_block register in the
.debug_line state machine to true.
prologue_end
This option will set the prologue_end register in the
.debug_line state machine to true.
epilogue_begin
This option will set the epilogue_begin register in the
.debug_line state machine to true.
is_stmt
value
This option will set the is_stmt register in the
.debug_line state machine to value, which must be
either 0 or 1.
isa
value
This directive will set the isa register in the .debug_line
state machine to value, which must be an unsigned integer.
.loc_mark_labels
enable
The .loc_mark_labels directive makes the assembler emit an entry
to the .debug_line line number matrix with the basic_block
register in the state machine set whenever a code label is seen.
The enable argument should be either 1 or 0, to enable or disable
this function respectively.
The text of the Arduino reference is licensed under a Creative Commons Attribution-ShareAlike 3.0 License. Code samples in the reference are released into the public domain.