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* config/tc-i386.c (pe_lcomm_internal): New function. Allows the 

alignment field of the .lcomm directive to be optional.
  (pe_lcomm): New function.  Pass pe_lcomm_internal to
  s_comm_internal.
  (md_pseudo_table): Implement .lcomm directive for COFF based
  targets.
  * doc/c-i386.texi (i386-Directives): New node.  Used to document
  the .lcomm directive.
This commit is contained in:
Nick Clifton 2008-09-03 14:02:30 +00:00
parent 514f746bdc
commit a6c24e68b9
3 changed files with 81 additions and 0 deletions
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11
gas/ChangeLog
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@ -1,3 +1,14 @@
2008-09-03 Nick Clifton <nickc@redhat.com>
* config/tc-i386.c (pe_lcomm_internal): New function. Allows the
alignment field of the .lcomm directive to be optional.
(pe_lcomm): New function. Pass pe_lcomm_internal to
s_comm_internal.
(md_pseudo_table): Implement .lcomm directive for COFF based
targets.
* doc/c-i386.texi (i386-Directives): New node. Used to document
the .lcomm directive.
2008-08-30 John David Anglin <dave.anglin@nrc-cnrc.gc.ca>
* config/tc-hppa.h: Don't define DWARF2_EH_FRAME_READ_ONLY on Linux

44
gas/config/tc-i386.c
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@ -684,6 +684,48 @@ static const arch_entry cpu_arch[] =
CPU_SSE5_FLAGS },
};
/* Like s_lcomm_internal in gas/read.c but the alignment string
is allowed to be optional. */
static symbolS *
pe_lcomm_internal (int needs_align, symbolS *symbolP, addressT size)
{
addressT align = 0;
SKIP_WHITESPACE ();
if (needs_align
&& *input_line_pointer == ',')
{
align = parse_align (needs_align - 1);
if (align == (addressT) -1)
return NULL;
}
else
{
if (size >= 8)
align = 3;
else if (size >= 4)
align = 2;
else if (size >= 2)
align = 1;
else
align = 0;
}
bss_alloc (symbolP, size, align);
return symbolP;
}
void pe_lcomm (int);
void
pe_lcomm (int needs_align)
{
s_comm_internal (needs_align * 2, pe_lcomm_internal);
}
const pseudo_typeS md_pseudo_table[] =
{
#if !defined(OBJ_AOUT) && !defined(USE_ALIGN_PTWO)
@ -694,6 +736,8 @@ const pseudo_typeS md_pseudo_table[] =
{"arch", set_cpu_arch, 0},
#ifndef I386COFF
{"bss", s_bss, 0},
#else
{"lcomm", pe_lcomm, 1},
#endif
{"ffloat", float_cons, 'f'},
{"dfloat", float_cons, 'd'},

26
gas/doc/c-i386.texi
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@ -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