Branch data     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                 :            : }