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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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16
gold/options.cc
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@@ -997,7 +997,8 @@ General_options::General_options()
fix_v4bx_(FIX_V4BX_NONE),
endianness_(ENDIANNESS_NOT_SET),
discard_locals_(DISCARD_SEC_MERGE),
orphan_handling_enum_(ORPHAN_PLACE)
orphan_handling_enum_(ORPHAN_PLACE),
start_stop_visibility_enum_(elfcpp::STV_PROTECTED)
{
// Turn off option registration once construction is complete.
gold::options::ready_to_register = false;
@@ -1169,6 +1170,19 @@ General_options::finalize()
this->set_orphan_handling_enum(ORPHAN_ERROR);
}
// Parse the -z start-stop-visibility argument.
if (this->user_set_start_stop_visibility())
{
if (strcmp(this->start_stop_visibility(), "default") == 0)
this->set_start_stop_visibility_enum(elfcpp::STV_DEFAULT);
else if (strcmp(this->start_stop_visibility(), "internal") == 0)
this->set_start_stop_visibility_enum(elfcpp::STV_INTERNAL);
else if (strcmp(this->start_stop_visibility(), "hidden") == 0)
this->set_start_stop_visibility_enum(elfcpp::STV_HIDDEN);
else if (strcmp(this->start_stop_visibility(), "protected") == 0)
this->set_start_stop_visibility_enum(elfcpp::STV_PROTECTED);
}
// -M is equivalent to "-Map -".
if (this->print_map() && !this->user_set_Map())
{