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Diffstat (limited to 'gas/doc/c-i386.texi')
| -rw-r--r-- | gas/doc/c-i386.texi | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/gas/doc/c-i386.texi b/gas/doc/c-i386.texi index 55cab7e..731bda2 100644 --- a/gas/doc/c-i386.texi +++ b/gas/doc/c-i386.texi @@ -23,6 +23,7 @@ extending the Intel architecture to 64-bits. @menu * i386-Options:: Options +* i386-Directives:: X86 specific directives * i386-Syntax:: AT&T Syntax versus Intel Syntax * i386-Mnemonics:: Instruction Naming * i386-Regs:: Register Naming @@ -193,6 +194,31 @@ The @code{.att_syntax} and @code{.intel_syntax} directives will take precedent. @end table +@node i386-Directives +@section x86 specific Directives + +@cindex machine directives, x86 +@cindex x86 machine directives +@table @code + +@cindex @code{lcomm} directive, COFF +@item .lcomm @var{symbol} , @var{length}[, @var{alignment}] +Reserve @var{length} (an absolute expression) bytes for a local common +denoted by @var{symbol}. The section and value of @var{symbol} are +those of the new local common. The addresses are allocated in the bss +section, so that at run-time the bytes start off zeroed. @var{Symbol} +is not declared global (@pxref{Global,,@code{.global}}), so is normally +not visible to @code{@value{LD}}. The optional third parameter, +@var{alignment}, specifies the desired alignment of the symbol in the +bss section. + +This directive is only available for COFF based x86 targets. + +@c FIXME: Document other x86 specific directives ? Eg: .code16gcc, +@c .largecomm + +@end table + @node i386-Syntax @section AT&T Syntax versus Intel Syntax |