PT_R13
cfi_ld t1, PT_R13, \docfi
cfi_st t1, PT_R13, \docfi
OFFSET(PT_R13, pt_regs, regs[13]);
DEFINE(PT_R13, offsetof(struct pt_regs, r13));
cfi_ld $13, PT_R13, \docfi
cfi_st $13, PT_R13, \docfi
OFFSET(PT_R13, pt_regs, regs[13]);
stw r13, PT_R13(sp)
ldw r13, PT_R13(sp)
OFFSET(PT_R13, pt_regs, r13);
CHECK_REG(PT_R13, gpr[13]);