MTC0 zero, CP0_CONTEXT # clear context register
PTR_LA $28, init_thread_union
- PTR_LI sp, _THREAD_SIZE - 32
+ /* Set the SP after an empty pt_regs. */
+ PTR_LI sp, _THREAD_SIZE - 32 - PT_SIZE
PTR_ADDU sp, $28
set_saved_sp sp, t0, t1
PTR_SUBU sp, 4 * SZREG # init stack pointer