PT_R21
DEFINE(PT_R21, offsetof(struct pt_regs, exregs[5]));
cfi_st u0, PT_R21, \docfi
cfi_ld u0, PT_R21, \docfi
OFFSET(PT_R21, pt_regs, regs[21]);
DEFINE(PT_R21, offsetof(struct pt_regs, r21));
LONG_S $21, PT_R21(sp)
LONG_L $21, PT_R21(sp)
"sw\t$21,"__str(PT_R21)"($29)\n\t" \
"sd\t$21,"__str(PT_R21)"($29)\n\t" \
cfi_st $21, PT_R21, \docfi
cfi_ld $21, PT_R21, \docfi
OFFSET(PT_R21, pt_regs, regs[21]);
CHECK_REG(PT_R21, gpr[21]);