1 #include <errno.h> 2 #include "perf_regs.h" 3 #include "event.h" 4 5 const struct sample_reg __weak sample_reg_masks[] = { 6 SMPL_REG_END 7 }; 8 9 int perf_reg_value(u64 *valp, struct regs_dump *regs, int id) 10 { 11 int i, idx = 0; 12 u64 mask = regs->mask; 13 14 if (regs->cache_mask & (1 << id)) 15 goto out; 16 17 if (!(mask & (1 << id))) 18 return -EINVAL; 19 20 for (i = 0; i < id; i++) { 21 if (mask & (1 << i)) 22 idx++; 23 } 24 25 regs->cache_mask |= (1 << id); 26 regs->cache_regs[id] = regs->regs[idx]; 27 28 out: 29 *valp = regs->cache_regs[id]; 30 return 0; 31 } 32