Branch data     Line data    Source code

       1                 :             : /* Fetch live process registers from TID.
       2                 :             :    This file is part of elfutils.
       3                 :             : 
       4                 :             :    This file is free software; you can redistribute it and/or modify
       5                 :             :    it under the terms of either
       6                 :             : 
       7                 :             :      * the GNU Lesser General Public License as published by the Free
       8                 :             :        Software Foundation; either version 3 of the License, or (at
       9                 :             :        your option) any later version
      10                 :             : 
      11                 :             :    or
      12                 :             : 
      13                 :             :      * the GNU General Public License as published by the Free
      14                 :             :        Software Foundation; either version 2 of the License, or (at
      15                 :             :        your option) any later version
      16                 :             : 
      17                 :             :    or both in parallel, as here.
      18                 :             : 
      19                 :             :    elfutils is distributed in the hope that it will be useful, but
      20                 :             :    WITHOUT ANY WARRANTY; without even the implied warranty of
      21                 :             :    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      22                 :             :    General Public License for more details.
      23                 :             : 
      24                 :             :    You should have received copies of the GNU General Public License and
      25                 :             :    the GNU Lesser General Public License along with this program.  If
      26                 :             :    not, see <http://www.gnu.org/licenses/>.  */
      27                 :             : 
      28                 :             : #ifdef HAVE_CONFIG_H
      29                 :             : # include <config.h>
      30                 :             : #endif
      31                 :             : 
      32                 :             : #include "system.h"
      33                 :             : #include <assert.h>
      34                 :             : #if defined __riscv && defined __linux__
      35                 :             : # include <sys/uio.h>
      36                 :             : # include <sys/procfs.h>
      37                 :             : # include <sys/ptrace.h>
      38                 :             : #endif
      39                 :             : 
      40                 :             : #define BACKEND riscv_
      41                 :             : #include "libebl_CPU.h"
      42                 :             : 
      43                 :             : bool
      44                 :           0 : riscv_set_initial_registers_tid (pid_t tid __attribute__ ((unused)),
      45                 :             :                                  ebl_tid_registers_t *setfunc __attribute__ ((unused)),
      46                 :             :                                  void *arg __attribute__ ((unused)))
      47                 :             : {
      48                 :             : #if !defined __riscv || !defined __linux__
      49                 :           0 :   return false;
      50                 :             : #else /* __riscv */
      51                 :             : 
      52                 :             :   /* General registers.  */
      53                 :             :   elf_gregset_t gregs;
      54                 :             :   struct iovec iovec;
      55                 :             :   iovec.iov_base = &gregs;
      56                 :             :   iovec.iov_len = sizeof (gregs);
      57                 :             :   if (ptrace (PTRACE_GETREGSET, tid, NT_PRSTATUS, &iovec) != 0)
      58                 :             :     return false;
      59                 :             : 
      60                 :             :   /* X0 is constant 0.  */
      61                 :             :   Dwarf_Word zero = 0;
      62                 :             :   if (! setfunc (0, 1, &zero, arg))
      63                 :             :     return false;
      64                 :             : 
      65                 :             :   /* X1..X31.  */
      66                 :             :   if (! setfunc (1, 32, (Dwarf_Word *) &gregs[1], arg))
      67                 :             :     return false;
      68                 :             : 
      69                 :             :   /* PC.  */
      70                 :             :   if (! setfunc (-1, 1, (Dwarf_Word *) &gregs[0], arg))
      71                 :             :     return false;
      72                 :             : 
      73                 :             :   /* FP registers not yet supported.  */
      74                 :             : 
      75                 :             :   return true;
      76                 :             : #endif /* __riscv */
      77                 :             : }