1 // SPDX-License-Identifier: GPL-2.0 2 #include <errno.h> 3 #include "perf_regs.h" 4 #include "event.h" 5 6 const struct sample_reg __weak sample_reg_masks[] = { 7 SMPL_REG_END 8 }; 9 10 int __weak arch_sdt_arg_parse_op(char *old_op __maybe_unused, 11 char **new_op __maybe_unused) 12 { 13 return SDT_ARG_SKIP; 14 } 15 16 #ifdef HAVE_PERF_REGS_SUPPORT 17 int perf_reg_value(u64 *valp, struct regs_dump *regs, int id) 18 { 19 int i, idx = 0; 20 u64 mask = regs->mask; 21 22 if (regs->cache_mask & (1ULL << id)) 23 goto out; 24 25 if (!(mask & (1ULL << id))) 26 return -EINVAL; 27 28 for (i = 0; i < id; i++) { 29 if (mask & (1ULL << i)) 30 idx++; 31 } 32 33 regs->cache_mask |= (1ULL << id); 34 regs->cache_regs[id] = regs->regs[idx]; 35 36 out: 37 *valp = regs->cache_regs[id]; 38 return 0; 39 } 40 #endif 41