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       1                 :            : /* Fetch live process registers from TID.
       2                 :            :    Copyright (C) 2023 OpenAnolis community LoongArch SIG.
       3                 :            :    Copyright (C) 2023 Loongson Technology Corporation Limted.
       4                 :            :    This file is part of elfutils.
       5                 :            : 
       6                 :            :    This file is free software; you can redistribute it and/or modify
       7                 :            :    it under the terms of either
       8                 :            : 
       9                 :            :      * the GNU Lesser General Public License as published by the Free
      10                 :            :        Software Foundation; either version 3 of the License, or (at
      11                 :            :        your option) any later version
      12                 :            : 
      13                 :            :    or
      14                 :            : 
      15                 :            :      * the GNU General Public License as published by the Free
      16                 :            :        Software Foundation; either version 2 of the License, or (at
      17                 :            :        your option) any later version
      18                 :            : 
      19                 :            :    or both in parallel, as here.
      20                 :            : 
      21                 :            :    elfutils is distributed in the hope that it will be useful, but
      22                 :            :    WITHOUT ANY WARRANTY; without even the implied warranty of
      23                 :            :    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      24                 :            :    General Public License for more details.
      25                 :            : 
      26                 :            :    You should have received copies of the GNU General Public License and
      27                 :            :    the GNU Lesser General Public License along with this program.  If
      28                 :            :    not, see <http://www.gnu.org/licenses/>.  */
      29                 :            : 
      30                 :            : #ifdef HAVE_CONFIG_H
      31                 :            : # include <config.h>
      32                 :            : #endif
      33                 :            : 
      34                 :            : #include "system.h"
      35                 :            : #include <assert.h>
      36                 :            : #if defined __loongarch__ && defined __linux__
      37                 :            : # include <sys/uio.h>
      38                 :            : # include <sys/procfs.h>
      39                 :            : # include <sys/ptrace.h>
      40                 :            : #endif
      41                 :            : 
      42                 :            : #define BACKEND loongarch_
      43                 :            : #include "libebl_CPU.h"
      44                 :            : 
      45                 :            : bool
      46                 :          0 : loongarch_set_initial_registers_tid (pid_t tid __attribute__ ((unused)),
      47                 :            :                                  ebl_tid_registers_t *setfunc __attribute__ ((unused)),
      48                 :            :                                  void *arg __attribute__ ((unused)))
      49                 :            : {
      50                 :            : #if !defined __loongarch__ || !defined __linux__
      51                 :          0 :   return false;
      52                 :            : #else /* __loongarch__ */
      53                 :            : 
      54                 :            :   /* General registers.  */
      55                 :            :   struct user_regs_struct gregs;
      56                 :            :   struct iovec iovec;
      57                 :            :   iovec.iov_base = &gregs;
      58                 :            :   iovec.iov_len = sizeof (gregs);
      59                 :            :   if (ptrace (PTRACE_GETREGSET, tid, NT_PRSTATUS, &iovec) != 0)
      60                 :            :     return false;
      61                 :            : 
      62                 :            :   /* $r0 is constant 0.  */
      63                 :            :   Dwarf_Word zero = 0;
      64                 :            :   if (! setfunc (0, 1, &zero, arg))
      65                 :            :     return false;
      66                 :            : 
      67                 :            :   /* $r1-$r31.  */
      68                 :            :   if (! setfunc (1, 32, (Dwarf_Word *) &gregs.regs[1], arg))
      69                 :            :     return false;
      70                 :            : 
      71                 :            :   /* PC.  */
      72                 :            :   if (! setfunc (-1, 1, (Dwarf_Word *) &gregs.csr_era, arg))
      73                 :            :     return false;
      74                 :            : 
      75                 :            :   /* Floating-point registers (only 64bits are used).  */
      76                 :            :   struct user_fp_struct fregs;
      77                 :            :   iovec.iov_base = &fregs;
      78                 :            :   iovec.iov_len = sizeof (fregs);
      79                 :            :   if (ptrace (PTRACE_GETREGSET, tid, NT_FPREGSET, &iovec) != 0)
      80                 :            :     return false;
      81                 :            : 
      82                 :            :   /* $f0-$f31 */
      83                 :            :   if (! setfunc (32, 32, (Dwarf_Word *) &fregs.fpr[0], arg))
      84                 :            :     return false;
      85                 :            : 
      86                 :            :   return true;
      87                 :            : #endif /* __loongarch__ */
      88                 :            : }