/*
FUNCTION
bfd_decode_symclass
DESCRIPTION
Return a character corresponding to the symbol
class of @var{symbol}, or '?' for an unknown class.
SYNOPSIS
int bfd_decode_symclass (asymbol *symbol);
*/
int
bfd_decode_symclass (asymbol *symbol)
{
char c;
if (symbol->section && bfd_is_com_section (symbol->section))
return 'C';
if (bfd_is_und_section (symbol->section))
{
if (symbol->flags & BSF_WEAK)
{
/* If weak, determine if it's specifically an object
or non-object weak. */
if (symbol->flags & BSF_OBJECT)
return 'v';
else
return 'w';
}
else
return 'U';
}
if (bfd_is_ind_section (symbol->section))
return 'I';
if (symbol->flags & BSF_GNU_INDIRECT_FUNCTION)
return 'i';
if (symbol->flags & BSF_WEAK)
{
/* If weak, determine if it's specifically an object
or non-object weak. */
if (symbol->flags & BSF_OBJECT)
return 'V';
else
return 'W';
}
if (symbol->flags & BSF_GNU_UNIQUE)
return 'u';
if (!(symbol->flags & (BSF_GLOBAL | BSF_LOCAL)))
return '?';
if (bfd_is_abs_section (symbol->section))
c = 'a';
else if (symbol->section)
{
c = coff_section_type (symbol->section->name);
if (c == '?')
c = decode_section_type (symbol->section);
}
else
return '?';
if (symbol->flags & BSF_GLOBAL)
c = TOUPPER (c);
return c;
/* We don't have to handle these cases just yet, but we will soon:
N_SETV: 'v';
N_SETA: 'l';
N_SETT: 'x';
N_SETD: 'z';
N_SETB: 's';
N_INDR: 'i';
*/
}
/* To determine which symbols should be resolved LDPR_PREVAILING_DEF
and which LDPR_PREVAILING_DEF_IRONLY, we notice all the symbols as
the linker adds them to the linker hash table. Mark those
referenced from a non-IR file with non_ir_ref. We have to
notice_all symbols, because we won't necessarily know until later
which ones will be contributed by IR files. */
static bfd_boolean
plugin_notice (struct bfd_link_info *info,
struct bfd_link_hash_entry *h,
bfd *abfd,
asection *section,
bfd_vma value,
flagword flags,
const char *string)
{
if (h != NULL)
{
bfd *sym_bfd;
/* No further processing if this def/ref is from an IR dummy BFD. */
if (is_ir_dummy_bfd (abfd))
return TRUE;
/* Making an indirect symbol counts as a reference unless this
is a brand new symbol. */
if (bfd_is_ind_section (section)
|| (flags & BSF_INDIRECT) != 0)
{
if (h->type != bfd_link_hash_new)
{
struct bfd_link_hash_entry *inh;
h->non_ir_ref = TRUE;
inh = bfd_wrapped_link_hash_lookup (abfd, info, string, FALSE,
FALSE, FALSE);
if (inh != NULL)
inh->non_ir_ref = TRUE;
}
}
/* Nothing to do here for warning symbols. */
else if ((flags & BSF_WARNING) != 0)
;
/* Nothing to do here for constructor symbols. */
else if ((flags & BSF_CONSTRUCTOR) != 0)
;
/* If this is a ref, set non_ir_ref. */
else if (bfd_is_und_section (section))
h->non_ir_ref = TRUE;
/* Otherwise, it must be a new def. Ensure any symbol defined
in an IR dummy BFD takes on a new value from a real BFD.
Weak symbols are not normally overridden by a new weak
definition, and strong symbols will normally cause multiple
definition errors. Avoid this by making the symbol appear
to be undefined. */
else if (((h->type == bfd_link_hash_defweak
|| h->type == bfd_link_hash_defined)
&& is_ir_dummy_bfd (sym_bfd = h->u.def.section->owner))
|| (h->type == bfd_link_hash_common
&& is_ir_dummy_bfd (sym_bfd = h->u.c.p->section->owner)))
{
h->type = bfd_link_hash_undefweak;
h->u.undef.abfd = sym_bfd;
}
}
/* Continue with cref/nocrossref/trace-sym processing. */
if (h == NULL
|| orig_notice_all
|| (info->notice_hash != NULL
&& bfd_hash_lookup (info->notice_hash, h->root.string,
FALSE, FALSE) != NULL))
return (*orig_callbacks->notice) (info, h,
abfd, section, value, flags, string);
return TRUE;
}
/* To determine which symbols should be resolved LDPR_PREVAILING_DEF
and which LDPR_PREVAILING_DEF_IRONLY, we notice all the symbols as
the linker adds them to the linker hash table. Mark those
referenced from a non-IR file with non_ir_ref. We have to
notice_all symbols, because we won't necessarily know until later
which ones will be contributed by IR files. */
static bfd_boolean
plugin_notice (struct bfd_link_info *info,
struct bfd_link_hash_entry *h,
struct bfd_link_hash_entry *inh,
bfd *abfd,
asection *section,
bfd_vma value,
flagword flags)
{
struct bfd_link_hash_entry *orig_h = h;
if (h != NULL)
{
bfd *sym_bfd;
if (h->type == bfd_link_hash_warning)
h = h->u.i.link;
/* Nothing to do here if this def/ref is from an IR dummy BFD. */
if (is_ir_dummy_bfd (abfd))
;
/* Making an indirect symbol counts as a reference unless this
is a brand new symbol. */
else if (bfd_is_ind_section (section)
|| (flags & BSF_INDIRECT) != 0)
{
/* ??? Some of this is questionable. See comments in
_bfd_generic_link_add_one_symbol for case IND. */
if (h->type != bfd_link_hash_new)
{
h->non_ir_ref = TRUE;
inh->non_ir_ref = TRUE;
}
else if (inh->type == bfd_link_hash_new)
inh->non_ir_ref = TRUE;
}
/* Nothing to do here for warning symbols. */
else if ((flags & BSF_WARNING) != 0)
;
/* Nothing to do here for constructor symbols. */
else if ((flags & BSF_CONSTRUCTOR) != 0)
;
/* If this is a ref, set non_ir_ref. */
else if (bfd_is_und_section (section))
{
/* Replace the undefined dummy bfd with the real one. */
if ((h->type == bfd_link_hash_undefined
|| h->type == bfd_link_hash_undefweak)
&& (h->u.undef.abfd == NULL
|| (h->u.undef.abfd->flags & BFD_PLUGIN) != 0))
h->u.undef.abfd = abfd;
h->non_ir_ref = TRUE;
}
/* Otherwise, it must be a new def. */
else
{
/* A common symbol should be merged with other commons or
defs with the same name. In particular, a common ought
to be overridden by a def in a -flto object. In that
sense a common is also a ref. */
if (bfd_is_com_section (section))
h->non_ir_ref = TRUE;
/* Ensure any symbol defined in an IR dummy BFD takes on a
new value from a real BFD. Weak symbols are not normally
overridden by a new weak definition, and strong symbols
will normally cause multiple definition errors. Avoid
this by making the symbol appear to be undefined. */
if (((h->type == bfd_link_hash_defweak
|| h->type == bfd_link_hash_defined)
&& is_ir_dummy_bfd (sym_bfd = h->u.def.section->owner))
|| (h->type == bfd_link_hash_common
&& is_ir_dummy_bfd (sym_bfd = h->u.c.p->section->owner)))
{
h->type = bfd_link_hash_undefweak;
h->u.undef.abfd = sym_bfd;
}
}
}
/* Continue with cref/nocrossref/trace-sym processing. */
if (orig_h == NULL
|| orig_notice_all
|| (info->notice_hash != NULL
&& bfd_hash_lookup (info->notice_hash, orig_h->root.string,
FALSE, FALSE) != NULL))
return (*orig_callbacks->notice) (info, orig_h, inh,
abfd, section, value, flags);
return TRUE;
}