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 __weak arch_sdt_arg_parse_op(char *old_op __maybe_unused, 10 char **new_op __maybe_unused) 11 { 12 return SDT_ARG_SKIP; 13 } 14 15 #ifdef HAVE_PERF_REGS_SUPPORT 16 int perf_reg_value(u64 *valp, struct regs_dump *regs, int id) 17 { 18 int i, idx = 0; 19 u64 mask = regs->mask; 20 21 if (regs->cache_mask & (1ULL << id)) 22 goto out; 23 24 if (!(mask & (1ULL << id))) 25 return -EINVAL; 26 27 for (i = 0; i < id; i++) { 28 if (mask & (1ULL << i)) 29 idx++; 30 } 31 32 regs->cache_mask |= (1ULL << id); 33 regs->cache_regs[id] = regs->regs[idx]; 34 35 out: 36 *valp = regs->cache_regs[id]; 37 return 0; 38 } 39 #endif 40