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The special linker variable dot `.' always contains the
current output location counter. Since the . always refers to
a location in an output section, it must always appear in an
expression within a SECTIONS command. The . symbol
may appear anywhere that an ordinary symbol is allowed in an
expression, but its assignments have a side effect. Assigning a value
to the . symbol will cause the location counter to be moved.
This may be used to create holes in the output section. The location
counter may never be moved backwards.
SECTIONS
{
output :
{
file1(.text)
. = . + 1000;
file2(.text)
. += 1000;
file3(.text)
} = 0x1234;
}
In the previous example, file1 is located at the beginning of the
output section, then there is a 1000 byte gap. Then file2
appears, also with a 1000 byte gap following before file3 is
loaded. The notation `= 0x1234' specifies what data to write in
the gaps (see section Optional Section Attributes).
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