PT_R20
DEFINE(PT_R20, offsetof(struct pt_regs, exregs[4]));
cfi_st t8, PT_R20, \docfi
cfi_ld t8, PT_R20, \docfi
OFFSET(PT_R20, pt_regs, regs[20]);
DEFINE(PT_R20, offsetof(struct pt_regs, r20));
LONG_S $20, PT_R20(sp)
LONG_L $20, PT_R20(sp)
"sw\t$20,"__str(PT_R20)"($29)\n\t" \
"sd\t$20,"__str(PT_R20)"($29)\n\t" \
cfi_st $20, PT_R20, \docfi
cfi_ld $20, PT_R20, \docfi
OFFSET(PT_R20, pt_regs, regs[20]);
CHECK_REG(PT_R20, gpr[20]);