PERL_CALLCONV void Perl_sv_setsv_mg(pTHX_ SV *dstr, SV *sstr);
PERL_CALLCONV void Perl_sv_usepvn_mg(pTHX_ SV *sv, char *ptr, STRLEN len);
PERL_CALLCONV MGVTBL* Perl_get_vtbl(pTHX_ int vtbl_id);
-PERL_CALLCONV char* Perl_pv_display(pTHX_ SV *sv, char *pv, STRLEN cur, STRLEN len, STRLEN pvlim);
+PERL_CALLCONV char* Perl_pv_display(pTHX_ SV *dsv, char *pv, STRLEN cur, STRLEN len, STRLEN pvlim);
+PERL_CALLCONV char* Perl_sv_uni_display(pTHX_ SV *dsv, SV *ssv, STRLEN pvlim);
PERL_CALLCONV void Perl_dump_indent(pTHX_ I32 level, PerlIO *file, const char* pat, ...)
#ifdef CHECK_FORMAT
__attribute__((format(printf,pTHX_3,pTHX_4)))