ref: babf901b4a508c3ec5d1f89655f10377bbdf9637
dir: /Inferno/thumb/include/ureg.h/
typedef struct Ureg { uint r0; uint r1; uint r2; uint r3; uint r4; uint r5; uint r6; uint r7; uint r8; uint r9; uint r10; uint r11; uint r12; union { uint r13; uint sp; }; uint r14; uint link; uint type; uint psr; uint pc; } Ureg;