"invalid PT_DYNAMIC size" when building MIPS vDSO after -next commit 2db1ec80dfd5f9f1200acc90ec04a9c8ea47701a

[nathanchance]

After commit 2db1ec80dfd5 ("MIPS: VDSO: Fold MIPS_DISABLE_VDSO into MIPS_GENERIC_GETTIMEOFDAY") in -next, I see:

$ make -skj"$(nproc)" ARCH=mips LLVM=1 mrproper allnoconfig arch/mips/vdso/
llvm-readelf: warning: 'arch/mips/vdso/vdso.so.dbg.raw': invalid PT_DYNAMIC size (0xa4)
llvm-readelf: warning: 'arch/mips/vdso/vdso.so.dbg.raw': PT_DYNAMIC dynamic table is invalid: SHT_DYNAMIC will be used

This has come up before (#2093). I think I have a fix for this, just need to do some further digging and write a proper commit message.

[nickdesaulniers]

Yeah, perhaps another linker script fixup: https://lore.kernel.org/linux-riscv/20250602-riscv-vdso-v1-1-0620cf63cff0@maskray.me/T/#u