in kernel/disasm.c [459:490]
void __kprobes set_reg(int reg, long val, struct pt_regs *regs,
struct callee_regs *cregs)
{
long *p;
switch (reg) {
case 0 ... 12:
p = ®s->r0;
p[-reg] = val;
break;
case 13 ... 25:
if (cregs) {
p = &cregs->r13;
p[13-reg] = val;
}
break;
case 26:
regs->r26 = val;
break;
case 27:
regs->fp = val;
break;
case 28:
regs->sp = val;
break;
case 31:
regs->blink = val;
break;
default:
break;
}
}