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 arch_sdt_arg_parse_op(char * old_op __maybe_unused,char ** new_op __maybe_unused)10int __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 arch__intr_reg_mask(void)16uint64_t __weak arch__intr_reg_mask(void) 17 { 18 return PERF_REGS_MASK; 19 } 20 arch__user_reg_mask(void)21uint64_t __weak arch__user_reg_mask(void) 22 { 23 return PERF_REGS_MASK; 24 } 25 26 #ifdef HAVE_PERF_REGS_SUPPORT perf_reg_value(u64 * valp,struct regs_dump * regs,int id)27int perf_reg_value(u64 *valp, struct regs_dump *regs, int id) 28 { 29 int i, idx = 0; 30 u64 mask = regs->mask; 31 32 if (regs->cache_mask & (1ULL << id)) 33 goto out; 34 35 if (!(mask & (1ULL << id))) 36 return -EINVAL; 37 38 for (i = 0; i < id; i++) { 39 if (mask & (1ULL << i)) 40 idx++; 41 } 42 43 regs->cache_mask |= (1ULL << id); 44 regs->cache_regs[id] = regs->regs[idx]; 45 46 out: 47 *valp = regs->cache_regs[id]; 48 return 0; 49 } 50 #endif 51