_Unwind_Context took its cursor table from LibcUnwind::CursorSlots, a C++
data symbol of libc. On Windows LibcUnwind::Frame holds an _Unwind_Context,
so libSceAgcDriver, which builds frames for its worker sampler, imported
_ZN10LibcUnwind11CursorSlotsE from libc.prx. The NID patcher renames that
export in the patched libc and leaves the import alone, so the patched
libSceAgcDriver, libSceAgc and libSceVideoOut failed to load with error 127
and patched_libraries failed. The table is now file-local and the context
reads it through UnwindCursorSlots_nid_no_patch, which keeps its name on
both sides.
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