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* doc/as.texinfo (Comm): Added @node. Moved before CFI 

directives node.
This commit is contained in:
Tom Tromey 2003-06-12 14:32:19 +00:00
parent 084edea536
commit d88ef7a621
2 changed files with 37 additions and 29 deletions
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5
gas/ChangeLog
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@ -1,3 +1,8 @@
2003-06-12 Tom Tromey <tromey@redhat.com>
* doc/as.texinfo (Comm): Added @node. Moved before CFI
directives node.
2003-06-12 Richard Sandiford <rsandifo@redhat.com>
* config/tc-mips.c (append_insn): In a compound relocation, take the

61
gas/doc/as.texinfo
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@ -1,6 +1,6 @@
\input texinfo @c -*-Texinfo-*-
@c Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
@c 2001, 2002
@c 2001, 2002, 2003
@c Free Software Foundation, Inc.
@c UPDATE!! On future updates--
@c (1) check for new machine-dep cmdline options in
@ -3969,6 +3969,37 @@ undefined.
@code{.byte} expects zero or more expressions, separated by commas.
Each expression is assembled into the next byte.
@node Comm
@section @code{.comm @var{symbol} , @var{length} }
@cindex @code{comm} directive
@cindex symbol, common
@code{.comm} declares a common symbol named @var{symbol}. When linking, a
common symbol in one object file may be merged with a defined or common symbol
of the same name in another object file. If @code{@value{LD}} does not see a
definition for the symbol--just one or more common symbols--then it will
allocate @var{length} bytes of uninitialized memory. @var{length} must be an
absolute expression. If @code{@value{LD}} sees multiple common symbols with
the same name, and they do not all have the same size, it will allocate space
using the largest size.
@ifset ELF
When using ELF, the @code{.comm} directive takes an optional third argument.
This is the desired alignment of the symbol, specified as a byte boundary (for
example, an alignment of 16 means that the least significant 4 bits of the
address should be zero). The alignment must be an absolute expression, and it
must be a power of two. If @code{@value{LD}} allocates uninitialized memory
for the common symbol, it will use the alignment when placing the symbol. If
no alignment is specified, @command{@value{AS}} will set the alignment to the
largest power of two less than or equal to the size of the symbol, up to a
maximum of 16.
@end ifset
@ifset HPPA
The syntax for @code{.comm} differs slightly on the HPPA. The syntax is
@samp{@var{symbol} .comm, @var{length}}; @var{symbol} is optional.
@end ifset
@node CFI directives
@section @code{.cfi_startproc}
@cindex @code{cfi_startproc} directive
@ -4019,34 +4050,6 @@ Allows the user to add arbitrary bytes to the unwind info. One
might use this to add OS-specific CFI opcodes, or generic CFI
opcodes that GAS does not yet support.
@cindex @code{comm} directive
@cindex symbol, common
@code{.comm} declares a common symbol named @var{symbol}. When linking, a
common symbol in one object file may be merged with a defined or common symbol
of the same name in another object file. If @code{@value{LD}} does not see a
definition for the symbol--just one or more common symbols--then it will
allocate @var{length} bytes of uninitialized memory. @var{length} must be an
absolute expression. If @code{@value{LD}} sees multiple common symbols with
the same name, and they do not all have the same size, it will allocate space
using the largest size.
@ifset ELF
When using ELF, the @code{.comm} directive takes an optional third argument.
This is the desired alignment of the symbol, specified as a byte boundary (for
example, an alignment of 16 means that the least significant 4 bits of the
address should be zero). The alignment must be an absolute expression, and it
must be a power of two. If @code{@value{LD}} allocates uninitialized memory
for the common symbol, it will use the alignment when placing the symbol. If
no alignment is specified, @command{@value{AS}} will set the alignment to the
largest power of two less than or equal to the size of the symbol, up to a
maximum of 16.
@end ifset
@ifset HPPA
The syntax for @code{.comm} differs slightly on the HPPA. The syntax is
@samp{@var{symbol} .comm, @var{length}}; @var{symbol} is optional.
@end ifset
@node Data
@section @code{.data @var{subsection}}