Line data    Source code

       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              : }