Constant R_LARCH_TLS_DESC_PCADD_HI20 

pub const R_LARCH_TLS_DESC_PCADD_HI20: u32 = 138;

The signed 32-bit offset offs from PC to (GP + GD + 0x800) & 0xfffff000.

We define the PC relative anchor for the TLS DESC GOT entry at GP + GD as PC + offs (offs is sign-extended to VA bits).