GDB (API): /home/stan/gdb/src/gdb/shnbsd-nat.c Source File

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00001 /* Native-dependent code for NetBSD/sh.
00002 
00003    Copyright (C) 2002-2013 Free Software Foundation, Inc.
00004 
00005    Contributed by Wasabi Systems, Inc.
00006 
00007    This file is part of GDB.
00008 
00009    This program is free software; you can redistribute it and/or modify
00010    it under the terms of the GNU General Public License as published by
00011    the Free Software Foundation; either version 3 of the License, or
00012    (at your option) any later version.
00013 
00014    This program is distributed in the hope that it will be useful,
00015    but WITHOUT ANY WARRANTY; without even the implied warranty of
00016    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00017    GNU General Public License for more details.
00018 
00019    You should have received a copy of the GNU General Public License
00020    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
00021 
00022 #include "defs.h"
00023 #include "inferior.h"
00024 
00025 #include <sys/types.h>
00026 #include <sys/ptrace.h>
00027 #include <machine/reg.h>
00028 
00029 #include "sh-tdep.h"
00030 #include "inf-ptrace.h"
00031 #include "regcache.h"
00032 
00033 
00034 /* Determine if PT_GETREGS fetches this register.  */
00035 #define GETREGS_SUPPLIES(gdbarch, regno) \
00036   (((regno) >= R0_REGNUM && (regno) <= (R0_REGNUM + 15)) \
00037 || (regno) == gdbarch_pc_regnum (gdbarch) || (regno) == PR_REGNUM \
00038 || (regno) == MACH_REGNUM || (regno) == MACL_REGNUM \
00039 || (regno) == SR_REGNUM)
00040 
00041 /* Sizeof `struct reg' in <machine/reg.h>.  */
00042 #define SHNBSD_SIZEOF_GREGS     (21 * 4)
00043 
00044 static void
00045 shnbsd_fetch_inferior_registers (struct target_ops *ops,
00046                                  struct regcache *regcache, int regno)
00047 {
00048   if (regno == -1 || GETREGS_SUPPLIES (get_regcache_arch (regcache), regno))
00049     {
00050       struct reg inferior_registers;
00051 
00052       if (ptrace (PT_GETREGS, ptid_get_pid (inferior_ptid),
00053                   (PTRACE_TYPE_ARG3) &inferior_registers, 0) == -1)
00054         perror_with_name (_("Couldn't get registers"));
00055 
00056       sh_corefile_supply_regset (&sh_corefile_gregset, regcache, regno,
00057                                  (char *) &inferior_registers,
00058                                  SHNBSD_SIZEOF_GREGS);
00059 
00060       if (regno != -1)
00061         return;
00062     }
00063 }
00064 
00065 static void
00066 shnbsd_store_inferior_registers (struct target_ops *ops,
00067                                  struct regcache *regcache, int regno)
00068 {
00069   if (regno == -1 || GETREGS_SUPPLIES (get_regcache_arch (regcache), regno))
00070     {
00071       struct reg inferior_registers;
00072 
00073       if (ptrace (PT_GETREGS, ptid_get_pid (inferior_ptid),
00074                   (PTRACE_TYPE_ARG3) &inferior_registers, 0) == -1)
00075         perror_with_name (_("Couldn't get registers"));
00076 
00077       sh_corefile_collect_regset (&sh_corefile_gregset, regcache, regno,
00078                                   (char *) &inferior_registers,
00079                                   SHNBSD_SIZEOF_GREGS);
00080 
00081       if (ptrace (PT_SETREGS, ptid_get_pid (inferior_ptid),
00082                   (PTRACE_TYPE_ARG3) &inferior_registers, 0) == -1)
00083         perror_with_name (_("Couldn't set registers"));
00084 
00085       if (regno != -1)
00086         return;
00087     }
00088 }
00089 
00090 /* Provide a prototype to silence -Wmissing-prototypes.  */
00091 void _initialize_shnbsd_nat (void);
00092 
00093 void
00094 _initialize_shnbsd_nat (void)
00095 {
00096   struct target_ops *t;
00097 
00098   t = inf_ptrace_target ();
00099   t->to_fetch_registers = shnbsd_fetch_inferior_registers;
00100   t->to_store_registers = shnbsd_store_inferior_registers;
00101   add_target (t);
00102 }