PT_R29
DEFINE(PT_R29, offsetof(struct pt_regs, exregs[13]));
cfi_st s6, PT_R29, \docfi
cfi_ld s6, PT_R29, \docfi
OFFSET(PT_R29, pt_regs, regs[29]);
DEFINE(PT_R29, offsetof(struct pt_regs, r29));
cfi_st k0, PT_R29, \docfi
cfi_rel_offset sp, PT_R29, \docfi
cfi_ld sp, PT_R29, \docfi
OFFSET(PT_R29, pt_regs, regs[29]);
CHECK_REG(PT_R29, gpr[29]);