Decompile __init_cpp_exceptions.cpp

[vagnertxr]

Matches and links Runtime.PPCEABI.H/__init_cpp_exceptions.cpp, taking the DOL to 508 linked files.

Three things the unit needs beyond the plain translation:

• cflags_runtime carries no OpenRVL include paths, so ExtabIndexInfo and the __register_fragment/__unregister_fragment prototypes are declared locally rather than pulled from <revolution/OS/__ppc_eabi_init.h>.

• __register_fragment takes the TOC in r2. An asm helper function is never inlined by mwcc and would emit its own symbol, so the value is read with an inline asm block into a register local, which lowers to the single mr r4, r2 the target has.

• The unit owns 8 bytes of .sdata, and a lone int leaves the section 4 bytes short, shifting everything after it. Pairing the id with its trailing word reproduces the section byte-for-byte.

The .ctors$10 and .dtors$15 entries are referenced only as data, so the linker discards them unless kept alive; both are added to force_active for the DOL. Without that the build links but main.dol mismatches, with 0x804064E0 holding the wrong pointer.

Verified: ninja reports 127 files OK.