PT_R28
DEFINE(PT_R28, offsetof(struct pt_regs, exregs[12]));
cfi_st s5, PT_R28, \docfi
cfi_ld s5, PT_R28, \docfi
OFFSET(PT_R28, pt_regs, regs[28]);
DEFINE(PT_R28, offsetof(struct pt_regs, r28));
LONG_S $28, PT_R28(sp)
LONG_L $28, PT_R28(sp)
cfi_st $28, PT_R28, \docfi
cfi_ld $28, PT_R28, \docfi
cfi_ld $28, PT_R28, \docfi
OFFSET(PT_R28, pt_regs, regs[28]);
CHECK_REG(PT_R28, gpr[28]);