Line data    Source code

       1              : /* Populate process registers from a linux perf_events sample.
       2              :    Copyright (C) 2025 Red Hat, Inc.
       3              :    This file is part of elfutils.
       4              : 
       5              :    This file is free software; you can redistribute it and/or modify
       6              :    it under the terms of either
       7              : 
       8              :      * the GNU Lesser General Public License as published by the Free
       9              :        Software Foundation; either version 3 of the License, or (at
      10              :        your option) any later version
      11              : 
      12              :    or
      13              : 
      14              :      * the GNU General Public License as published by the Free
      15              :        Software Foundation; either version 2 of the License, or (at
      16              :        your option) any later version
      17              : 
      18              :    or both in parallel, as here.
      19              : 
      20              :    elfutils is distributed in the hope that it will be useful, but
      21              :    WITHOUT ANY WARRANTY; without even the implied warranty of
      22              :    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      23              :    General Public License for more details.
      24              : 
      25              :    You should have received copies of the GNU General Public License and
      26              :    the GNU Lesser General Public License along with this program.  If
      27              :    not, see <http://www.gnu.org/licenses/>.  */
      28              : 
      29              : #ifdef HAVE_CONFIG_H
      30              : # include <config.h>
      31              : #endif
      32              : 
      33              : #include <stdlib.h>
      34              : #include <assert.h>
      35              : #if defined(__x86_64__) && defined(__linux__)
      36              : # include <linux/perf_event.h>
      37              : # include <asm/perf_regs.h>
      38              : #endif
      39              : 
      40              : #define BACKEND x86_64_
      41              : #include "libebl_CPU.h"
      42              : #include "libebl_PERF_FLAGS.h"
      43              : #if defined(__x86_64__) && defined(__linux__)
      44              : # include "x86_initreg_sample.c"
      45              : # define HAVE_X86_INITREG_SAMPLE
      46              : #endif
      47              : 
      48              : bool
      49            0 : x86_64_sample_sp_pc (const Dwarf_Word *regs, uint32_t n_regs,
      50              :                      const int *regs_mapping, uint32_t n_regs_mapping,
      51              :                      Dwarf_Word *sp, Dwarf_Word *pc)
      52              : {
      53              : #ifdef HAVE_X86_INITREG_SAMPLE
      54              :   /* XXX for dwarf_regs indices, compare x86_64_initreg.c */
      55            0 :   return x86_sample_sp_pc (regs, n_regs, regs_mapping, n_regs_mapping,
      56              :                            sp, 7 /* index of sp in dwarf_regs */,
      57              :                            pc, 16 /* index of pc in dwarf_regs */);
      58              : #else
      59              :   (void) regs;
      60              :   (void) n_regs;
      61              :   (void) regs_mapping;
      62              :   (void) n_regs_mapping;
      63              :   (void) sp;
      64              :   (void) pc;
      65              :   return false;
      66              : #endif
      67              : }
      68              : 
      69              : bool
      70            0 : x86_64_sample_perf_regs_mapping (Ebl *ebl,
      71              :                                  uint64_t perf_regs_mask, uint32_t abi,
      72              :                                  const int **regs_mapping,
      73              :                                  size_t *n_regs_mapping)
      74              : {
      75              : #ifdef HAVE_X86_INITREG_SAMPLE
      76            0 :   return x86_sample_perf_regs_mapping (ebl, perf_regs_mask, abi,
      77              :                                        regs_mapping, n_regs_mapping);
      78              : #else
      79              :   (void) ebl;
      80              :   (void) perf_regs_mask;
      81              :   (void) abi;
      82              :   (void) regs_mapping;
      83              :   (void) n_regs_mapping;
      84              :   return false;
      85              : #endif
      86              : }