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authorFangrui Song <maskray@google.com>2020-06-03 06:37:39 -0700
committerH.J. Lu <hjl.tools@gmail.com>2020-06-03 06:37:39 -0700
commit37a141bfed4dd3c33d77c15dfde00e4b4f5b24c7 (patch)
tree05fc3a047c219a7e59357a758472a566e926a570 /ld/NEWS
parent433953ffa1a59531a5537327a4e3ce24565e609c (diff)
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ld: Add --export-dynamic-symbol and --export-dynamic-symbol-list
--export-dynamic-symbol-list is like a dynamic list, but without the symbolic property for unspecified symbols. When creating an executable, --export-dynamic-symbol-list is treated like --dynamic-list. When creating a shared library, it is treated like --dynamic-list if -Bsymbolic or --dynamic-list are used, otherwise, it is ignored, so that references to matched symbols will not be bound to the definitions within the shared library. PR ld/25910 * NEWS: Mention --export-dynamic-symbol[-list]. * ld.texi: Document --export-dynamic-symbol[-list]. * ldgram.y: Pass current_dynamic_list_p to lang_append_dynamic_list. * ldlang.c (current_dynamic_list_p): New. (ang_append_dynamic_list): Updated to take a pointer to struct bfd_elf_dynamic_list * argument instead of using link_info.dynamic_list. (lang_append_dynamic_list_cpp_typeinfo): Pass &link_info.dynamic_list to ang_append_dynamic_list. (lang_append_dynamic_list_cpp_new): Likewise. * ldlang.h (current_dynamic_list_p): New. (lang_append_dynamic_list): Add a pointer to struct bfd_elf_dynamic_list * argument. * ldlex.h (option_values): Add OPTION_EXPORT_DYNAMIC_SYMBOL and OPTION_EXPORT_DYNAMIC_SYMBOL_LIST. * lexsup.c (ld_options): Add entries for OPTION_EXPORT_DYNAMIC_SYMBOL and OPTION_EXPORT_DYNAMIC_SYMBOL_LIST. (parse_args): Handle --export-dynamic-symbol and --export-dynamic-symbol-list. * testsuite/ld-dynamic/export-dynamic-symbol-1.d: New. * testsuite/ld-dynamic/export-dynamic-symbol-2.d: New. * testsuite/ld-dynamic/export-dynamic-symbol-glob.d: New. * testsuite/ld-dynamic/export-dynamic-symbol-list-1.d: New. * testsuite/ld-dynamic/export-dynamic-symbol-list-2.d: New. * testsuite/ld-dynamic/export-dynamic-symbol-list-glob.d: New. * testsuite/ld-dynamic/export-dynamic-symbol.exp: New. * testsuite/ld-dynamic/export-dynamic-symbol.s: New. * testsuite/ld-dynamic/foo-bar.list: New. * testsuite/ld-dynamic/foo.list: New. * testsuite/ld-dynamic/foo.s: New. * testsuite/ld-dynamic/fstar.list: New. * testsuite/ld-elf/dlempty.list: New. * testsuite/ld-elf/shared.exp: Add tests for --export-dynamic-symbol and --export-dynamic-symbol-list.
Diffstat (limited to 'ld/NEWS')
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diff --git a/ld/NEWS b/ld/NEWS
index 0dc5e9b..485e1cf 100644
--- a/ld/NEWS
+++ b/ld/NEWS
@@ -1,5 +1,8 @@
-*- text -*-
+* Add ELF linker command-line options, --export-dynamic-symbol and
+ --export-dynamic-symbol-list, to make symbols dynamic.
+
* Add a configure option, --enable-textrel-check=[no|yes|warning|error],
to decide what ELF linker should do by default with DT_TEXTREL in an
executable or shared library. Default to yes for Linux/x86 targets.