From eb8476a6e2fc115c0a953392e61ab27c7568a2a8 Mon Sep 17 00:00:00 2001
From: "Maciej W. Rozycki" <macro@linux-mips.org>
Date: Mon, 6 Aug 2012 22:27:52 +0000
Subject: 	bfd/ 	* elflink.c (bfd_elf_record_link_assignment): Remove
 --defsym 	symbols special case.

	ld/
	* ldexp.h (etree_union): Add defsym member to the assign member
	structure.
	(exp_assign): Add hidden argument to prototype.
	* ldexp.c (exp_fold_tree_1): Use the defsym member to handle
	--defsym symbols.
	(exp_assop): Add defsym argument, initialize the defsym member
	of the assign structure.
	(exp_assign): Handle hidden symbols.
	(exp_defsym): Update to use the defsym argument to exp_assop.
	(exp_provide): Update to handle the defsym argument to exp_assop.
	* ldlex.l (HIDDEN): New token.
	* ldgram.y (HIDDEN): Likewise.
	(assignment, section): Update calls to exp_assign.
	* ldctor.c (ldctor_build_sets): Likewise.
	* mri.c (mri_format): Likewise.
	* ldlang.c (lang_insert_orphan, lang_leave_overlay): Likewise.
	(open_input_bfds): Remove --defsym symbols special case.
	* emultempl/beos.em (gld_${EMULATION_NAME}_set_symbols): Update
	call to exp_assign.
	* emultempl/pe.em (gld_${EMULATION_NAME}_set_symbols): Likewise.
	* emultempl/pep.em (gld_${EMULATION_NAME}_set_symbols): Likewise.
	* emultempl/spuelf.em (spu_place_special_section): Likewise.
	* emultempl/xtensaelf.em (ld_xtensa_insert_page_offsets):
	Likewise.
	* ld.texinfo (Assigning Values to Symbols): Add HIDDEN.
	(HIDDEN): New subsection.
---
 ld/ld.texinfo | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

(limited to 'ld/ld.texinfo')

diff --git a/ld/ld.texinfo b/ld/ld.texinfo
index d0a5d90..dd3149c 100644
--- a/ld/ld.texinfo
+++ b/ld/ld.texinfo
@@ -3410,6 +3410,7 @@ the symbol and place it into the symbol table with a global scope.
 
 @menu
 * Simple Assignments::		Simple Assignments
+* HIDDEN::			HIDDEN
 * PROVIDE::			PROVIDE
 * PROVIDE_HIDDEN::		PROVIDE_HIDDEN
 * Source Code Reference::	How to use a linker script defined symbol in source code
@@ -3473,6 +3474,31 @@ the last @samp{.text} input section.  The symbol @samp{_bdata} will be
 defined as the address following the @samp{.text} output section aligned
 upward to a 4 byte boundary.
 
+@node HIDDEN
+@subsection HIDDEN
+@cindex HIDDEN
+For ELF targeted ports, define a symbol that will be hidden and won't be
+exported.  The syntax is @code{HIDDEN(@var{symbol} = @var{expression})}.
+
+Here is the example from @ref{Simple Assignments}, rewritten to use
+@code{HIDDEN}:
+
+@smallexample
+HIDDEN(floating_point = 0);
+SECTIONS
+@{
+  .text :
+    @{
+      *(.text)
+      HIDDEN(_etext = .);
+    @}
+  HIDDEN(_bdata = (. + 3) & ~ 3);
+  .data : @{ *(.data) @}
+@}
+@end smallexample
+@noindent
+In this case none of the three symbols will be visible outside this module.
+
 @node PROVIDE
 @subsection PROVIDE
 @cindex PROVIDE
-- 
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