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Improve COFF/PE linker garbage collection by preventing the removal of sections containing exported symbols.

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PR ld/19803
	* ldlang.c (lang_add_gc_name): New function.  Adds the provided
	symbol name to the list of gc symbols.
	(lang_process): Call lang_add_gc_name with entry_symbol_default if
	entry_symbol.name is NULL.  Use lang_add_gc_name to add the init
	and fini function names.
	* pe-dll.c (process_def_file_and_drectve): Add exported names to
	the gc symbol list.
	* testsuite/ld-pe/pr19803.s: Do not export _testval symbol.
	* testsuite/ld-pe/pr19803.d: Tweak expected output.
This commit is contained in:
Nick Clifton
2016-03-22 12:25:08 +00:00
parent a97fbc7e3c
commit 4153b6dbb0
6 changed files with 47 additions and 34 deletions
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3
ld/pe-dll.c
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@@ -897,6 +897,9 @@ process_def_file_and_drectve (bfd *abfd ATTRIBUTE_UNUSED, struct bfd_link_info *
char *int_name = pe_def_file->exports[i].internal_name;
char *name;
/* PR 19803: Make sure that any exported symbol does not get garbage collected. */
lang_add_gc_name (int_name);
name = xmalloc (strlen (int_name) + 2);
if (pe_details->underscored && int_name[0] != '@')
{