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Update descriptions of the .2byte, .4byte and .8byte directives. 

* doc/as.texinfo (2byte): Note that if no expressions are present
	the directive does nothing.  Emphasize that the output is
	unaligned, and that this can have an effect on the relocations
	generated.
	(4byte): Simplify description.  Refer back to the 2byte
	description.
	(8byte): Likewise.
This commit is contained in:
Nick Clifton 2017-03-20 16:57:07 +00:00
parent dcb84eda0c
commit e406e428df
2 changed files with 28 additions and 14 deletions
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gas/ChangeLog
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@ -1,3 +1,13 @@
2017-03-20 Nick Clifton <nickc@redhat.com>
* doc/as.texinfo (2byte): Note that if no expressions are present
the directive does nothing. Emphasize that the output is
unaligned, and that this can have an effect on the relocations
generated.
(4byte): Simplify description. Refer back to the 2byte
description.
(8byte): Likewise.
2017-03-20 Richard Earnshaw <rearnsha@arm.com>
* config/tc-arm.c (arm_fpus): Note entires that should not be

32
gas/doc/as.texinfo
View File

@ -7345,10 +7345,19 @@ instead of zero. Using @samp{.zero} in this way would be confusing however.
@cindex two-byte integer
@cindex integer, 2-byte
This directive expects zero or more expressions, separated by commas. Each
expression is evaluated and placed in the next two bytes of the current
section. If an expression will not fit in two bytes, a warning message
is displayed and the lowest two bytes of the expression's value are used.
This directive expects zero or more expressions, separated by commas. If there
are no expressions then the directive does nothing. Otherwise each expression
is evaluated in turn and placed in the next two bytes of the current output
section, using the endian model of the target. If an expression will not fit
in two bytes, a warning message is displayed and the least significant two
bytes of the expression's value are used. If an expression cannot be evaluated
at assembly time then relocations will be generated in order to compute the
value at link time.
This directive does not apply any alignment before or after inserting the
values. As a result of this, if relocations are generated, they may be
different from those used for inserting values with a guaranteed alignment.
This directive is only available for ELF targets,
@node 4byte
@ -7357,11 +7366,8 @@ This directive is only available for ELF targets,
@cindex four-byte integer
@cindex integer, 4-byte
This directive expects zero or more expressions, separated by commas. Each
expression is evaluated and placed in the next four bytes of the current
section. If an expression will not fit in four bytes, a warning message
is displayed and the lowest four bytes of the expression's value are used.
This directive is only available for ELF targets,
Like the @option{.2byte} directive, except that it inserts unaligned, four byte
long values into the output.
@node 8byte
@section @code{.8byte @var{expression} [, @var{expression}]*}
@ -7369,11 +7375,9 @@ This directive is only available for ELF targets,
@cindex eight-byte integer
@cindex integer, 8-byte
This directive expects zero or more expressions, separated by commas. Each
expression is evaluated and the resulting bignum is placed in the next eight
bytes of the current section. If an expression will not fit in eight bytes, a
warning message is displayed and the lowest eight bytes of the expression's
value are used. This directive is only available for ELF targets,
Like the @option{.8byte} directive, except that it inserts unaligned, eight
byte long bignum values into the output.
@end ifset
@node Deprecated