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2005-09-27 H.J. Lu <hongjiu.lu@intel.com>

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* ld.texinfo (ALIGN): Document it as forcing output section
	alignment.

	* ldgram.y (ALIGN): Support it for forcing output section
	alignment.
This commit is contained in:
H.J. Lu 2005-09-28 00:34:21 +00:00
parent f4b7fbb680
commit bbf115d3cc
3 changed files with 29 additions and 5 deletions
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8
ld/ChangeLog
View File

@ -1,3 +1,11 @@
2005-09-27 H.J. Lu <hongjiu.lu@intel.com>
* ld.texinfo (ALIGN): Document it as forcing output section
alignment.
* ldgram.y (ALIGN): Support it for forcing output section
alignment.
2005-09-20 Alan Modra <amodra@bigpond.net.au>
* ldlang.h (lang_output_section_statement_struct): Change type of

14
ld/ld.texinfo
View File

@ -3065,7 +3065,7 @@ The full description of an output section looks like this:
@smallexample
@group
@var{section} [@var{address}] [(@var{type})] :
[AT(@var{lma})] [SUBALIGN(@var{subsection_align})]
[AT(@var{lma})] [ALIGN(@var{section_align})] [SUBALIGN(@var{subsection_align})]
@{
@var{output-section-command}
@var{output-section-command}
@ -3641,7 +3641,7 @@ like this:
@smallexample
@group
@var{section} [@var{address}] [(@var{type})] :
[AT(@var{lma})] [SUBALIGN(@var{subsection_align})]
[AT(@var{lma})] [ALIGN(@var{section_align})] [SUBALIGN(@var{subsection_align})]
@{
@var{output-section-command}
@var{output-section-command}
@ -3656,6 +3656,7 @@ remaining section attributes.
@menu
* Output Section Type:: Output section type
* Output Section LMA:: Output section LMA
* Forced Output Alignment:: Forced Output Alignment
* Forced Input Alignment:: Forced Input Alignment
* Output Section Region:: Output section region
* Output Section Phdr:: Output section phdr
@ -3769,6 +3770,15 @@ for (dst = &_bstart; dst< &_bend; dst++)
@end group
@end smallexample
@node Forced Output Alignment
@subsubsection Forced Output Alignment
@kindex ALIGN(@var{section_align})
@cindex forcing output section alignment
@cindex output section alignment
You can force an output section alignment by using ALIGN. The value
specified overrides any alignment given by input sections, whether
larger or smaller.
@node Forced Input Alignment
@subsubsection Forced Input Alignment
@kindex SUBALIGN(@var{subsection_align})

12
ld/ldgram.y
View File

@ -92,7 +92,7 @@ static int error_index;
}
%type <etree> exp opt_exp_with_type mustbe_exp opt_at phdr_type phdr_val
%type <etree> opt_exp_without_type opt_subalign
%type <etree> opt_exp_without_type opt_subalign opt_align
%type <fill> fill_opt fill_exp
%type <name_list> exclude_name_list
%type <wildcard_list> file_NAME_list
@ -889,6 +889,11 @@ opt_at:
| { $$ = 0; }
;
opt_align:
ALIGN_K '(' exp ')' { $$ = $3; }
| { $$ = 0; }
;
opt_subalign:
SUBALIGN '(' exp ')' { $$ = $3; }
| { $$ = 0; }
@ -904,20 +909,21 @@ sect_constraint:
section: NAME { ldlex_expression(); }
opt_exp_with_type
opt_at
opt_align
opt_subalign { ldlex_popstate (); ldlex_script (); }
sect_constraint
'{'
{
lang_enter_output_section_statement($1, $3,
sectype,
0, $5, $4, $7);
$5, $6, $4, $8);
}
statement_list_opt
'}' { ldlex_popstate (); ldlex_expression (); }
memspec_opt memspec_at_opt phdr_opt fill_opt
{
ldlex_popstate ();
lang_leave_output_section_statement ($16, $13, $15, $14);
lang_leave_output_section_statement ($17, $14, $16, $15);
}
opt_comma
{}