Chapter 8. Assembler Directives

59

8.76.

.sbttl "subheading"

Use

subheading

as the title (third line, immediately after the title line) when generating assembly

listings.

This directive affects subsequent pages, as well as the current page if it appears within ten lines of the

top of a page.

8.77.

.scl class

Set the storage class value for a symbol. This directive may only be used inside a

.def

/

.endef

pair. Storage class may flag whether a symbol is static or external, or it may record further symbolic

debugging information.

The

.scl

directive is primarily associated with COFF output; when configured to generate

b.out

output format,

as

accepts this directive but ignores it.

8.78.

.section name

Use the

.section

directive to assemble the following code into a section named

name

.

This directive is only supported for targets that actually support arbitrarily named sections; on

a.out

targets, for example, it is not accepted, even with a standard

a.out

section name.

8.78.1. COFF Version

For COFF targets, the

.section

directive is used in one of the following ways:

.section name[, "flags"]

.section name[, subsegment]

If the optional argument is quoted, it is taken as flags to use for the section. Each flag is a single

character. The following flags are recognized:

b

bss section (uninitialized data)

n

section is not loaded

w

writable section

d

data section

r

read only section

x

executable section