1 /* Native-dependent code for AMD64 BSD's.
3 Copyright (C) 2003-2014 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
25 /* We include <signal.h> to make sure `struct fxsave64' is defined on
26 NetBSD, since NetBSD's <machine/reg.h> needs it. */
28 #include <sys/types.h>
29 #include <sys/ptrace.h>
30 #include <machine/reg.h>
32 #include "amd64-tdep.h"
33 #include "amd64-nat.h"
34 #include "amd64bsd-nat.h"
35 #include "inf-ptrace.h"
38 /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this
39 for all registers (including the floating-point registers). */
42 amd64bsd_fetch_inferior_registers (struct target_ops
*ops
,
43 struct regcache
*regcache
, int regnum
)
45 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
47 if (regnum
== -1 || amd64_native_gregset_supplies_p (gdbarch
, regnum
))
51 if (ptrace (PT_GETREGS
, ptid_get_pid (inferior_ptid
),
52 (PTRACE_TYPE_ARG3
) ®s
, 0) == -1)
53 perror_with_name (_("Couldn't get registers"));
55 amd64_supply_native_gregset (regcache
, ®s
, -1);
60 if (regnum
== -1 || !amd64_native_gregset_supplies_p (gdbarch
, regnum
))
64 if (ptrace (PT_GETFPREGS
, ptid_get_pid (inferior_ptid
),
65 (PTRACE_TYPE_ARG3
) &fpregs
, 0) == -1)
66 perror_with_name (_("Couldn't get floating point status"));
68 amd64_supply_fxsave (regcache
, -1, &fpregs
);
72 /* Store register REGNUM back into the inferior. If REGNUM is -1, do
73 this for all registers (including the floating-point registers). */
76 amd64bsd_store_inferior_registers (struct target_ops
*ops
,
77 struct regcache
*regcache
, int regnum
)
79 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
81 if (regnum
== -1 || amd64_native_gregset_supplies_p (gdbarch
, regnum
))
85 if (ptrace (PT_GETREGS
, ptid_get_pid (inferior_ptid
),
86 (PTRACE_TYPE_ARG3
) ®s
, 0) == -1)
87 perror_with_name (_("Couldn't get registers"));
89 amd64_collect_native_gregset (regcache
, ®s
, regnum
);
91 if (ptrace (PT_SETREGS
, ptid_get_pid (inferior_ptid
),
92 (PTRACE_TYPE_ARG3
) ®s
, 0) == -1)
93 perror_with_name (_("Couldn't write registers"));
99 if (regnum
== -1 || !amd64_native_gregset_supplies_p (gdbarch
, regnum
))
103 if (ptrace (PT_GETFPREGS
, ptid_get_pid (inferior_ptid
),
104 (PTRACE_TYPE_ARG3
) &fpregs
, 0) == -1)
105 perror_with_name (_("Couldn't get floating point status"));
107 amd64_collect_fxsave (regcache
, regnum
, &fpregs
);
109 if (ptrace (PT_SETFPREGS
, ptid_get_pid (inferior_ptid
),
110 (PTRACE_TYPE_ARG3
) &fpregs
, 0) == -1)
111 perror_with_name (_("Couldn't write floating point status"));
115 /* Create a prototype *BSD/amd64 target. The client can override it
116 with local methods. */
119 amd64bsd_target (void)
121 struct target_ops
*t
;
123 t
= inf_ptrace_target ();
124 t
->to_fetch_registers
= amd64bsd_fetch_inferior_registers
;
125 t
->to_store_registers
= amd64bsd_store_inferior_registers
;
130 /* Support for debug registers. */
132 #ifdef HAVE_PT_GETDBREGS
135 amd64bsd_dr_get (ptid_t ptid
, int regnum
)
139 if (ptrace (PT_GETDBREGS
, ptid_get_pid (inferior_ptid
),
140 (PTRACE_TYPE_ARG3
) &dbregs
, 0) == -1)
141 perror_with_name (_("Couldn't read debug registers"));
143 return DBREG_DRX ((&dbregs
), regnum
);
147 amd64bsd_dr_set (int regnum
, unsigned long value
)
151 if (ptrace (PT_GETDBREGS
, ptid_get_pid (inferior_ptid
),
152 (PTRACE_TYPE_ARG3
) &dbregs
, 0) == -1)
153 perror_with_name (_("Couldn't get debug registers"));
155 /* For some mysterious reason, some of the reserved bits in the
156 debug control register get set. Mask these off, otherwise the
157 ptrace call below will fail. */
158 DBREG_DRX ((&dbregs
), 7) &= ~(0xffffffff0000fc00);
160 DBREG_DRX ((&dbregs
), regnum
) = value
;
162 if (ptrace (PT_SETDBREGS
, ptid_get_pid (inferior_ptid
),
163 (PTRACE_TYPE_ARG3
) &dbregs
, 0) == -1)
164 perror_with_name (_("Couldn't write debug registers"));
168 amd64bsd_dr_set_control (unsigned long control
)
170 amd64bsd_dr_set (7, control
);
174 amd64bsd_dr_set_addr (int regnum
, CORE_ADDR addr
)
176 gdb_assert (regnum
>= 0 && regnum
<= 4);
178 amd64bsd_dr_set (regnum
, addr
);
182 amd64bsd_dr_get_addr (int regnum
)
184 return amd64bsd_dr_get (inferior_ptid
, regnum
);
188 amd64bsd_dr_get_status (void)
190 return amd64bsd_dr_get (inferior_ptid
, 6);
194 amd64bsd_dr_get_control (void)
196 return amd64bsd_dr_get (inferior_ptid
, 7);
199 #endif /* PT_GETDBREGS */