diff options
Diffstat (limited to 'src/abi.h')
| -rw-r--r-- | src/abi.h | 50 |
1 files changed, 37 insertions, 13 deletions
@@ -74,7 +74,7 @@ struct msvc_rtti_locator { // I mean seriously look at this crap! #define DEF_MSVC_BASIC_RTTI(mod, name, vtab, typestr) \ -const mod struct msvc_rtti_locator name; \ +mod const struct msvc_rtti_locator name; \ static const struct { \ struct msvc_rtti_descriptor_head d; \ char classname[sizeof("" typestr)]; \ @@ -93,24 +93,48 @@ mod const struct msvc_rtti_locator name = { \ #else -#warning FIXME! More stuff needs to be implemented/fixed here! +struct itanium_type_info_vtable { + void *dtor1, *dtor2; +}; struct itanium_type_info { - struct itanium_type_info_vtable { - void *dtor1, *dtor2; // ??? - // there's some more functions here in libstdc++: is_pointer, - // is_function, do_catch, etc. however they're not specified in itanium - // abi doc. hoping to do without them, but we'll see I guess - } *vtable; + struct itanium_type_info_vtable *vtable; const char *name; }; +struct itanium_vmi_type_info { + struct itanium_type_info base; + uint flags; + uint nbases; + // then there's a flexible array of `__base_class_type_info`s, but for our + // purposes we can just have zero bases and avoid dealing with more nonsense +}; + +struct itanium_type_info_vtable_wrapper { + // Oh CHRIST, Unix RTTI is bonkers too. Each type_info is itself one of + // several subclasses with its own RTTI; the RTTI has RTTI! + ssize topoffset; + struct itanium_type_info *rtti; + struct itanium_type_info_vtable vtable; +}; + +// `typeinfo for __cxxabiv1::__vmi_class_type_info` in libcxxabi - type_info +// comparison is identity-based, so we need to import this from a shared object +// in order to implement the same ABI. I honestly don't know whether this or the +// MSVC design is more stupid. +extern struct itanium_type_info _ZTIN10__cxxabiv121__vmi_class_type_infoE; + +// XXX: just static for now, as only used for cvars and lto would dedupe anyway. +static void _itanium_type_info_dtor(void *this) {} + #define DEF_ITANIUM_BASIC_RTTI(mod, name, typestr) \ - mod struct itanium_type_info name = { \ - &(struct itanium_type_info_vtable){ \ - 0, 0 /* FIXME/TEMP: definitely need real functions here! */ \ - }, \ - typestr \ + mod const struct itanium_vmi_type_info name = { \ + &(struct itanium_type_info_vtable_wrapper){ \ + 0, &_ZTIN10__cxxabiv121__vmi_class_type_infoE, \ + (void *)&_itanium_type_info_dtor, (void *)&_itanium_type_info_dtor \ + }.vtable, \ + typestr, \ + 0, 0 \ }; #endif |