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Linker part of PR16563 fix

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Presents .eh_frame input sections to the optimisation machinery in
elf-eh-frame.c in the order they are given by the linker script.

	PR 16563
bfd/
	* elflink.c (bfd_elf_discard_info): Process .eh_frame and .stab
	in the order they are mapped to output sections.
ld/
	* ldlang.c (map_head_is_link_order): Rename from
	stripped_excluded_sections.
	(lang_clear_os_map): New function, extracted from..
	(strip_excluded_output_sections): ..here.
	* ldlang.h (lang_clear_os_map): Declare.
	* ldwrite.c (ldwrite): Call lang_clear_os_map.
	* emultempl/sh64elf.em (sh64_elf_${EMULATION_NAME}_after_allocation):
	Likewise.
This commit is contained in:
Alan Modra
2014-08-14 13:49:31 +09:30
parent b879806f2f
commit 18cd5bce47
7 changed files with 128 additions and 61 deletions
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42
ld/ldlang.c
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@@ -57,7 +57,7 @@ static struct obstack map_obstack;
#define obstack_chunk_free free
static const char *entry_symbol_default = "start";
static bfd_boolean placed_commons = FALSE;
static bfd_boolean stripped_excluded_sections = FALSE;
static bfd_boolean map_head_is_link_order = FALSE;
static lang_output_section_statement_type *default_common_section;
static bfd_boolean map_option_f;
static bfd_vma print_dot;
@@ -2412,7 +2412,7 @@ lang_add_section (lang_statement_list_type *ptr,
section->output_section = output->bfd_section;
if (!link_info.relocatable
&& !stripped_excluded_sections)
&& !map_head_is_link_order)
{
asection *s = output->bfd_section->map_tail.s;
output->bfd_section->map_tail.s = section;
@@ -3912,10 +3912,6 @@ strip_excluded_output_sections (void)
}
}
/* TODO: Don't just junk map_head.s, turn them into link_orders. */
output_section->map_head.link_order = NULL;
output_section->map_tail.link_order = NULL;
if (exclude)
{
/* We don't set bfd_section to NULL since bfd_section of the
@@ -3927,10 +3923,42 @@ strip_excluded_output_sections (void)
link_info.output_bfd->section_count--;
}
}
}
/* Called from ldwrite to clear out asection.map_head and
asection.map_tail for use as link_orders in ldwrite.
FIXME: Except for sh64elf.em which starts creating link_orders in
its after_allocation routine so needs to call it early. */
void
lang_clear_os_map (void)
{
lang_output_section_statement_type *os;
if (map_head_is_link_order)
return;
for (os = &lang_output_section_statement.head->output_section_statement;
os != NULL;
os = os->next)
{
asection *output_section;
if (os->constraint < 0)
continue;
output_section = os->bfd_section;
if (output_section == NULL)
continue;
/* TODO: Don't just junk map_head.s, turn them into link_orders. */
output_section->map_head.link_order = NULL;
output_section->map_tail.link_order = NULL;
}
/* Stop future calls to lang_add_section from messing with map_head
and map_tail link_order fields. */
stripped_excluded_sections = TRUE;
map_head_is_link_order = TRUE;
}
static void