PT_R12
cfi_ld t0, PT_R12, \docfi
cfi_st t0, PT_R12, \docfi
OFFSET(PT_R12, pt_regs, regs[12]);
DEFINE(PT_R12, offsetof(struct pt_regs, r12));
cfi_ld $12, PT_R12, \docfi
cfi_st $12, PT_R12, \docfi
OFFSET(PT_R12, pt_regs, regs[12]);
stw r12, PT_R12(sp)
ldw r12, PT_R12(sp)
OFFSET(PT_R12, pt_regs, r12);
CHECK_REG(PT_R12, gpr[12]);