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       1                 :            : /* Fetch live process registers from TID. C-SKY version.
       2                 :            :    Copyright (C) 2019 Hangzhou C-SKY Microsystems co.,ltd.
       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 "system.h"
      34                 :            : #include <assert.h>
      35                 :            : #if defined __CSKY__ && defined __linux__
      36                 :            : # include <sys/uio.h>
      37                 :            : # include <sys/procfs.h>
      38                 :            : # include <sys/ptrace.h>
      39                 :            : #endif
      40                 :            : 
      41                 :            : #define BACKEND csky_
      42                 :            : #include "libebl_CPU.h"
      43                 :            : 
      44                 :            : bool
      45                 :          0 : csky_set_initial_registers_tid (pid_t tid __attribute__ ((unused)),
      46                 :            :                         ebl_tid_registers_t *setfunc __attribute__ ((unused)),
      47                 :            :                                 void *arg __attribute__ ((unused)))
      48                 :            : {
      49                 :            : #if !defined __CSKY__ || !defined __linux__
      50                 :          0 :   return false;
      51                 :            : #else /* __CSKY__ */
      52                 :            :   struct pt_regs user_regs;
      53                 :            :   struct iovec iovec;
      54                 :            :   iovec.iov_base = &user_regs;
      55                 :            :   iovec.iov_len = sizeof (user_regs);
      56                 :            :   if (ptrace (PTRACE_GETREGSET, tid, NT_PRSTATUS, &iovec) != 0)
      57                 :            :     return false;
      58                 :            : 
      59                 :            :   Dwarf_Word dwarf_regs[38];
      60                 :            : 
      61                 :            :   /* lr.  */
      62                 :            :   dwarf_regs[15] = user_regs.lr;
      63                 :            :   /* sp.  */
      64                 :            :   dwarf_regs[14] = user_regs.usp;
      65                 :            :   /* r0 ~ r13.  */
      66                 :            :   dwarf_regs[0] = user_regs.a0;
      67                 :            :   dwarf_regs[1] = user_regs.a1;
      68                 :            :   dwarf_regs[2] = user_regs.a2;
      69                 :            :   dwarf_regs[3] = user_regs.a3;
      70                 :            :   for (int i = 4; i < 14; i++)
      71                 :            :     dwarf_regs[i] = user_regs.regs[i - 4];
      72                 :            :   /* r ~ r13.  */
      73                 :            :   for (int i = 16; i < 31; i++)
      74                 :            :     dwarf_regs[i] = user_regs.exregs[i - 16];
      75                 :            :   /* tls.  */
      76                 :            :   dwarf_regs[31] = user_regs.tls;
      77                 :            :   /* hi.  */
      78                 :            :   dwarf_regs[36] = user_regs.rhi;
      79                 :            :   /* lo.  */
      80                 :            :   dwarf_regs[37] = user_regs.rlo;
      81                 :            :   /* pc.  */
      82                 :            :   dwarf_regs[32] = user_regs.pc;
      83                 :            :   setfunc (-1, 1, &dwarf_regs[32], arg);
      84                 :            : 
      85                 :            :   return setfunc (0, 38, dwarf_regs, arg);
      86                 :            : #endif
      87                 :            : }