* ld.texinfo: Typo fixes. Document SUBALIGN.
* ldgram.y (opt_subalign): Add. * ldlex.l (SUBALIGN): Recognize. * ldlang.c (overlay_subalign): New var. (lang_enter_overlay): Add subalign param. (lang_enter_overlay_section): Pass overlay_subalign to lang_enter_output_section_statement. * ldlang.h (lang_enter_overlay): Update.
This commit is contained in:
Alan Modra
parent
5d35169e36
commit
7e7d57681b
11
ld/ChangeLog
11
ld/ChangeLog
@ -1,3 +1,14 @@
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2003-07-27 Alan Modra <amodra@bigpond.net.au>
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* ld.texinfo: Typo fixes. Document SUBALIGN.
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* ldgram.y (opt_subalign): Add.
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* ldlex.l (SUBALIGN): Recognize.
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* ldlang.c (overlay_subalign): New var.
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(lang_enter_overlay): Add subalign param.
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(lang_enter_overlay_section): Pass overlay_subalign to
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lang_enter_output_section_statement.
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* ldlang.h (lang_enter_overlay): Update.
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2003-07-24 Nick Clifton <nickc@redhat.com>
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* po/fr.po: Updated French translation.
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@ -1217,7 +1217,7 @@ this option overrides it. @xref{BFD}.
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Create a position independent executable. This is currently only supported on
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ELF platforms. Position independent executables are similar to shared
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libraries in that they are relocated by the dynamic linker to the virtual
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address OS chooses for them (which can varry between invocations), like
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address the OS chooses for them (which can vary between invocations). Like
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normal dynamically linked executables they can be executed and symbols
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defined in the executable cannot be overridden by shared libraries.
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@ -2686,7 +2686,8 @@ in the first input file. The first section will be at address zero.
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The full description of an output section looks like this:
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@smallexample
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@group
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@var{section} [@var{address}] [(@var{type})] : [AT(@var{lma})]
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@var{section} [@var{address}] [(@var{type})] :
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[AT(@var{lma})] [SUBALIGN(@var{subsection_align})]
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@{
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@var{output-section-command}
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@var{output-section-command}
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@ -3207,7 +3208,8 @@ We showed above that the full description of an output section looked
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like this:
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@smallexample
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@group
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@var{section} [@var{address}] [(@var{type})] : [AT(@var{lma})]
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@var{section} [@var{address}] [(@var{type})] :
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[AT(@var{lma})] [SUBALIGN(@var{subsection_align})]
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@{
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@var{output-section-command}
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@var{output-section-command}
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@ -3222,6 +3224,7 @@ remaining section attributes.
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@menu
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* Output Section Type:: Output section type
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* Output Section LMA:: Output section LMA
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* Forced Input Alignment:: Forced Input Alignment
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* Output Section Region:: Output section region
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* Output Section Phdr:: Output section phdr
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* Output Section Fill:: Output section fill
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@ -3329,6 +3332,15 @@ for (dst = &_bstart; dst< &_bend; dst++)
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@end group
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@end smallexample
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@node Forced Input Alignment
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@subsubsection Forced Input Alignment
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@kindex SUBALIGN(@var{subsection_align})
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@cindex forcing input section alignment
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@cindex input section alignment
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You can force input section alignment within an output section by using
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SUBALIGN. The value specified overrides any alignment given by input
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sections, whether larger or smaller.
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@node Output Section Region
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@subsubsection Output Section Region
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@kindex >@var{region}
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24
ld/ldgram.y
24
ld/ldgram.y
@ -1,6 +1,6 @@
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/* A YACC grammar to parse a superset of the AT&T linker scripting language.
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Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
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2001, 2002 Free Software Foundation, Inc.
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2001, 2002, 2003 Free Software Foundation, Inc.
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Written by Steve Chamberlain of Cygnus Support (steve@cygnus.com).
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This file is part of GNU ld.
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@ -94,7 +94,7 @@ static int error_index;
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}
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%type <etree> exp opt_exp_with_type mustbe_exp opt_at phdr_type phdr_val
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%type <etree> opt_exp_without_type
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%type <etree> opt_exp_without_type opt_subalign
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%type <fill> fill_opt fill_exp
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%type <name_list> exclude_name_list
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%type <wildcard_list> file_NAME_list
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@ -142,7 +142,7 @@ static int error_index;
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%token STARTUP HLL SYSLIB FLOAT NOFLOAT NOCROSSREFS
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%token ORIGIN FILL
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%token LENGTH CREATE_OBJECT_SYMBOLS INPUT GROUP OUTPUT CONSTRUCTORS
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%token ALIGNMOD AT PROVIDE
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%token ALIGNMOD AT SUBALIGN PROVIDE
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%type <token> assign_op atype attributes_opt
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%type <name> filename
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%token CHIP LIST SECT ABSOLUTE LOAD NEWLINE ENDWORD ORDER NAMEWORD ASSERT_K
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@ -828,31 +828,37 @@ opt_at:
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| { $$ = 0; }
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;
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opt_subalign:
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SUBALIGN '(' exp ')' { $$ = $3; }
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| { $$ = 0; }
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;
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section: NAME { ldlex_expression(); }
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opt_exp_with_type
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opt_at { ldlex_popstate (); ldlex_script (); }
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opt_at
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opt_subalign { ldlex_popstate (); ldlex_script (); }
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'{'
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{
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lang_enter_output_section_statement($1, $3,
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sectype,
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0, 0, 0, $4);
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0, 0, $5, $4);
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}
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statement_list_opt
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'}' { ldlex_popstate (); ldlex_expression (); }
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memspec_opt memspec_at_opt phdr_opt fill_opt
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{
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ldlex_popstate ();
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lang_leave_output_section_statement ($14, $11, $13, $12);
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lang_leave_output_section_statement ($15, $12, $14, $13);
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}
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opt_comma
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{}
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| OVERLAY
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{ ldlex_expression (); }
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opt_exp_without_type opt_nocrossrefs opt_at
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opt_exp_without_type opt_nocrossrefs opt_at opt_subalign
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{ ldlex_popstate (); ldlex_script (); }
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'{'
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{
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lang_enter_overlay ($3);
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lang_enter_overlay ($3, $6);
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}
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overlay_section
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'}'
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@ -861,7 +867,7 @@ section: NAME { ldlex_expression(); }
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{
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ldlex_popstate ();
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lang_leave_overlay ($5, (int) $4,
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$15, $12, $14, $13);
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$16, $13, $15, $14);
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}
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opt_comma
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| /* The GROUP case is just enough to support the gcc
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11
ld/ldlang.c
11
ld/ldlang.c
@ -4649,6 +4649,8 @@ lang_add_nocrossref (struct lang_nocrossref *l)
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/* The overlay virtual address. */
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static etree_type *overlay_vma;
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/* And subsection alignment. */
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static etree_type *overlay_subalign;
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/* An expression for the maximum section size seen so far. */
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static etree_type *overlay_max;
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@ -4665,12 +4667,15 @@ static struct overlay_list *overlay_list;
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/* Start handling an overlay. */
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void
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lang_enter_overlay (etree_type *vma_expr)
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lang_enter_overlay (etree_type *vma_expr, etree_type *subalign)
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{
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/* The grammar should prevent nested overlays from occurring. */
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ASSERT (overlay_vma == NULL && overlay_max == NULL);
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ASSERT (overlay_vma == NULL
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&& overlay_subalign == NULL
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&& overlay_max == NULL);
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overlay_vma = vma_expr;
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overlay_subalign = subalign;
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}
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/* Start a section in an overlay. We handle this by calling
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@ -4684,7 +4689,7 @@ lang_enter_overlay_section (const char *name)
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etree_type *size;
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lang_enter_output_section_statement (name, overlay_vma, normal_section,
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0, 0, 0, 0);
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0, 0, overlay_subalign, 0);
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/* If this is the first section, then base the VMA of future
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sections on this one. This will work correctly even if `.' is
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@ -492,7 +492,7 @@ extern void lang_new_phdr
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extern void lang_add_nocrossref
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(struct lang_nocrossref *);
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extern void lang_enter_overlay
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(etree_type *);
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(etree_type *, etree_type *);
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extern void lang_enter_overlay_section
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(const char *);
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extern void lang_leave_overlay_section
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@ -306,6 +306,7 @@ V_IDENTIFIER [*?.$_a-zA-Z\[\]\-\!\^]([*?.$_a-zA-Z0-9\[\]\-\!\^]|::)*
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<BOTH,SCRIPT>"INCLUDE" { RTOKEN(INCLUDE);}
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<BOTH,SCRIPT>"PHDRS" { RTOKEN (PHDRS); }
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<EXPRESSION,BOTH,SCRIPT>"AT" { RTOKEN(AT);}
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<EXPRESSION,BOTH,SCRIPT>"SUBALIGN" { RTOKEN(SUBALIGN);}
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<EXPRESSION,BOTH,SCRIPT>"PROVIDE" { RTOKEN(PROVIDE); }
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<EXPRESSION,BOTH,SCRIPT>"KEEP" { RTOKEN(KEEP); }
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<EXPRESSION,BOTH,SCRIPT>"EXCLUDE_FILE" { RTOKEN(EXCLUDE_FILE); }
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