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 #ifdef HAVE_PERF_REGS_SUPPORT 10 int perf_reg_value(u64 *valp, struct regs_dump *regs, int id) 11 { 12 int i, idx = 0; 13 u64 mask = regs->mask; 14 15 if (regs->cache_mask & (1 << id)) 16 goto out; 17 18 if (!(mask & (1 << id))) 19 return -EINVAL; 20 21 for (i = 0; i < id; i++) { 22 if (mask & (1 << i)) 23 idx++; 24 } 25 26 regs->cache_mask |= (1 << id); 27 regs->cache_regs[id] = regs->regs[idx]; 28 29 out: 30 *valp = regs->cache_regs[id]; 31 return 0; 32 } 33 #endif 34