https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67834
John David Anglin changed:
What|Removed |Added
Status|RESOLVED|REOPENED
Last reconfirmed||2019-12-27
Version|5.2.1 |9.2.1
Resolution|FIXED |---
Target Milestone|5.5 |---
Ever confirmed|0 |1
--- Comment #9 from John David Anglin ---
This problem has reappeared since pa_reloc_rw_mask() was changed to allow
relocs in readonly data.
See this binutils bugzilla:
https://sourceware.org/bugzilla/show_bug.cgi?id=25315
We have a plabel relocation to the local symbol __tcf_0 in a comdat section.
It is setup here:
start_cleanup_fn (void)
{
char name[32];
tree fntype;
tree fndecl;
bool use_cxa_atexit = flag_use_cxa_atexit
&& !targetm.cxx.use_atexit_for_cxa_atexit ();
push_to_top_level ();
/* No need to mangle this. */
push_lang_context (lang_name_c);
/* Build the name of the function. */
sprintf (name, "__tcf_%d", start_cleanup_cnt++);
/* Build the function declaration. */
fntype = TREE_TYPE (get_atexit_fn_ptr_type ());
fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
/* It's a function with internal linkage, generated by the
compiler. */
TREE_PUBLIC (fndecl) = 0;
DECL_ARTIFICIAL (fndecl) = 1;
/* Make the function `inline' so that it is only emitted if it is
actually needed. It is unlikely that it will be inlined, since
it is only called via a function pointer, but we avoid unnecessary
emissions this way. */
DECL_DECLARED_INLINE_P (fndecl) = 1;
DECL_INTERFACE_KNOWN (fndecl) = 1;
The original problem was worked around with this binutils change:
static unsigned int
elf_hppa_action_discarded (asection *sec)
{
/* Ignore relocations in .data.rel.ro.local. This section can contain
PLABEL32 relocations to functions in discarded COMDAT groups. */
if (strcmp (".data.rel.ro.local", sec->name) == 0)
return 0;
