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| author | Maciej W. Rozycki <macro@linux-mips.org> | 2012-08-06 22:27:49 +0000 |
|---|---|---|
| committer | Maciej W. Rozycki <macro@linux-mips.org> | 2012-08-06 22:27:49 +0000 |
| commit | c5ddaa3c6b455edb6dfded81a16c534423bd100e (patch) | |
| tree | 95468e820fafc27024c6043f8eeca9ad263ddb4c /ld/ld.texinfo | |
| parent | 6993545d5650fa77e75e9ae4b52c5703a53c53cc (diff) | |
| download | binutils-redhat-c5ddaa3c6b455edb6dfded81a16c534423bd100e.tar.gz | |
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.
Diffstat (limited to 'ld/ld.texinfo')
| -rw-r--r-- | ld/ld.texinfo | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/ld/ld.texinfo b/ld/ld.texinfo index d0a5d907bf..dd3149c8df 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 |