Line data    Source code

       1              : /* Fetch live process registers from TID.
       2              :    Copyright (C) 2014 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              : #ifdef __linux__
      34              : #if defined __arm__
      35              : # include <sys/types.h>
      36              : # include <sys/user.h>
      37              : # include <sys/ptrace.h>
      38              : #endif
      39              : 
      40              : #ifdef __aarch64__
      41              : # include <linux/uio.h>
      42              : # include <sys/user.h>
      43              : # include <sys/ptrace.h>
      44              : /* Deal with old glibc defining user_pt_regs instead of user_regs_struct.  */
      45              : # ifndef HAVE_SYS_USER_REGS
      46              : #  define user_regs_struct user_pt_regs
      47              : # endif
      48              : #endif
      49              : #endif
      50              : 
      51              : #define BACKEND arm_
      52              : #include "libebl_CPU.h"
      53              : 
      54              : bool
      55            0 : arm_set_initial_registers_tid (pid_t tid __attribute__ ((unused)),
      56              :                           ebl_tid_registers_t *setfunc __attribute__ ((unused)),
      57              :                                void *arg __attribute__ ((unused)))
      58              : {
      59              : #if !defined(__linux__) || (!defined __arm__ && !defined __aarch64__)
      60            0 :   return false;
      61              : #else   /* __arm__ || __aarch64__ */
      62              : #if defined __arm__
      63              :   struct user_regs user_regs;
      64              :   if (ptrace (PTRACE_GETREGS, tid, NULL, &user_regs) != 0)
      65              :     return false;
      66              : 
      67              :   Dwarf_Word dwarf_regs[16];
      68              :   /* R0..R12 SP LR PC */
      69              :   for (int i = 0; i < 16; i++)
      70              :     dwarf_regs[i] = user_regs.uregs[i];
      71              : 
      72              :   return setfunc (0, 16, dwarf_regs, arg);
      73              : #elif defined __aarch64__
      74              :   /* Compat mode: arm compatible code running on aarch64 */
      75              :   int i;
      76              :   struct user_regs_struct gregs;
      77              :   struct iovec iovec;
      78              :   iovec.iov_base = &gregs;
      79              :   iovec.iov_len = sizeof (gregs);
      80              :   if (ptrace (PTRACE_GETREGSET, tid, NT_PRSTATUS, &iovec) != 0)
      81              :     return false;
      82              : 
      83              :   Dwarf_Word dwarf_regs[16];
      84              :   /* R0..R12 SP LR PC, encoded as 32 bit quantities */
      85              :   uint32_t *u32_ptr = (uint32_t *) &gregs.regs[0];
      86              :   for (i = 0; i < 16; i++)
      87              :     dwarf_regs[i] = u32_ptr[i];
      88              : 
      89              :   return setfunc (0, 16, dwarf_regs, arg);
      90              : #else
      91              : # error "source file error, it cannot happen"
      92              : #endif
      93              : #endif
      94              : }