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gold, ld: Implement -z start-stop-visibility=... option.

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gold/
	Implement -z start-stop-visibility=... option.
	* options.h (class General_options): Handle -z start-stop-visibility=.
	(General_options::start_stop_visibility_enum): New public method.
	(General_options::set_start_stop_visibility_enum): New private method.
	(General_options::start_stop_visibility_enum_): New private member.
	* options.cc (General_options::General_options): Add initializer.
	(General_options::finalize): Set this->start_stop_visibility_enum_
	from string value.
	* layout.cc (Layout::define_section_symbols): Use option setting.

bfd/
	* elflink.c (bfd_elf_define_start_stop): Use start_stop_visibility
	field of bfd_link_info.

include/
	* bfdlink.h (struct bfd_link_info): New field start_stop_visibility.

ld/
	* NEWS: Mention -z start-stop-visibility=... option for ELF.
	* ld.texi (Options): Document -z start-stop-visibility=... option.
	* ldmain.c (main): Initialize link_info.start_stop_visibility.
	* emultempl/elf.em (gld${EMULATION_NAME}_handle_option):
	Parse -z start-stop-visibility=... option.
This commit is contained in:
Roland McGrath 2020-06-15 11:45:02 -07:00
parent 6692031743
commit cae64165f4
13 changed files with 103 additions and 7 deletions
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5
gold/layout.cc
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@ -2474,6 +2474,7 @@ Layout::create_initial_dynamic_sections(Symbol_table* symtab)
void
Layout::define_section_symbols(Symbol_table* symtab)
{
const elfcpp::STV visibility = parameters->options().start_stop_visibility_enum();
for (Section_list::const_iterator p = this->section_list_.begin();
p != this->section_list_.end();
++p)
@ -2495,7 +2496,7 @@ Layout::define_section_symbols(Symbol_table* symtab)
0, // symsize
elfcpp::STT_NOTYPE,
elfcpp::STB_GLOBAL,
elfcpp::STV_PROTECTED,
visibility,
0, // nonvis
false, // offset_is_from_end
true); // only_if_ref
@ -2508,7 +2509,7 @@ Layout::define_section_symbols(Symbol_table* symtab)
0, // symsize
elfcpp::STT_NOTYPE,
elfcpp::STB_GLOBAL,
elfcpp::STV_PROTECTED,
visibility,
0, // nonvis
true, // offset_is_from_end
true); // only_if_ref