1 /* Native-dependent code for AMD64 BSD's.
3 Copyright (C) 2003-2016 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 #ifdef PT_GETXSTATE_INFO
39 size_t amd64bsd_xsave_len;
42 /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this
43 for all registers (including the floating-point registers). */
46 amd64bsd_fetch_inferior_registers (struct target_ops *ops,
47 struct regcache *regcache, int regnum)
49 struct gdbarch *gdbarch = get_regcache_arch (regcache);
51 if (regnum == -1 || amd64_native_gregset_supplies_p (gdbarch, regnum))
55 if (ptrace (PT_GETREGS, ptid_get_pid (inferior_ptid),
56 (PTRACE_TYPE_ARG3) ®s, 0) == -1)
57 perror_with_name (_("Couldn't get registers"));
59 amd64_supply_native_gregset (regcache, ®s, -1);
64 if (regnum == -1 || !amd64_native_gregset_supplies_p (gdbarch, regnum))
67 #ifdef PT_GETXSTATE_INFO
70 if (amd64bsd_xsave_len != 0)
72 xstateregs = alloca (amd64bsd_xsave_len);
73 if (ptrace (PT_GETXSTATE, ptid_get_pid (inferior_ptid),
74 (PTRACE_TYPE_ARG3) xstateregs, 0) == -1)
75 perror_with_name (_("Couldn't get extended state status"));
77 amd64_supply_xsave (regcache, -1, xstateregs);
82 if (ptrace (PT_GETFPREGS, ptid_get_pid (inferior_ptid),
83 (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
84 perror_with_name (_("Couldn't get floating point status"));
86 amd64_supply_fxsave (regcache, -1, &fpregs);
90 /* Store register REGNUM back into the inferior. If REGNUM is -1, do
91 this for all registers (including the floating-point registers). */
94 amd64bsd_store_inferior_registers (struct target_ops *ops,
95 struct regcache *regcache, int regnum)
97 struct gdbarch *gdbarch = get_regcache_arch (regcache);
99 if (regnum == -1 || amd64_native_gregset_supplies_p (gdbarch, regnum))
103 if (ptrace (PT_GETREGS, ptid_get_pid (inferior_ptid),
104 (PTRACE_TYPE_ARG3) ®s, 0) == -1)
105 perror_with_name (_("Couldn't get registers"));
107 amd64_collect_native_gregset (regcache, ®s, regnum);
109 if (ptrace (PT_SETREGS, ptid_get_pid (inferior_ptid),
110 (PTRACE_TYPE_ARG3) ®s, 0) == -1)
111 perror_with_name (_("Couldn't write registers"));
117 if (regnum == -1 || !amd64_native_gregset_supplies_p (gdbarch, regnum))
120 #ifdef PT_GETXSTATE_INFO
123 if (amd64bsd_xsave_len != 0)
125 xstateregs = alloca (amd64bsd_xsave_len);
126 if (ptrace (PT_GETXSTATE, ptid_get_pid (inferior_ptid),
127 (PTRACE_TYPE_ARG3) xstateregs, 0) == -1)
128 perror_with_name (_("Couldn't get extended state status"));
130 amd64_collect_xsave (regcache, regnum, xstateregs, 0);
132 if (ptrace (PT_SETXSTATE, ptid_get_pid (inferior_ptid),
133 (PTRACE_TYPE_ARG3) xstateregs, amd64bsd_xsave_len) == -1)
134 perror_with_name (_("Couldn't write extended state status"));
139 if (ptrace (PT_GETFPREGS, ptid_get_pid (inferior_ptid),
140 (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
141 perror_with_name (_("Couldn't get floating point status"));
143 amd64_collect_fxsave (regcache, regnum, &fpregs);
145 if (ptrace (PT_SETFPREGS, ptid_get_pid (inferior_ptid),
146 (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
147 perror_with_name (_("Couldn't write floating point status"));
151 /* Create a prototype *BSD/amd64 target. The client can override it
152 with local methods. */
155 amd64bsd_target (void)
157 struct target_ops *t;
159 t = inf_ptrace_target ();
160 t->to_fetch_registers = amd64bsd_fetch_inferior_registers;
161 t->to_store_registers = amd64bsd_store_inferior_registers;
166 /* Support for debug registers. */
168 #ifdef HAVE_PT_GETDBREGS
171 amd64bsd_dr_get (ptid_t ptid, int regnum)
175 if (ptrace (PT_GETDBREGS, ptid_get_pid (inferior_ptid),
176 (PTRACE_TYPE_ARG3) &dbregs, 0) == -1)
177 perror_with_name (_("Couldn't read debug registers"));
179 return DBREG_DRX ((&dbregs), regnum);
183 amd64bsd_dr_set (int regnum, unsigned long value)
187 if (ptrace (PT_GETDBREGS, ptid_get_pid (inferior_ptid),
188 (PTRACE_TYPE_ARG3) &dbregs, 0) == -1)
189 perror_with_name (_("Couldn't get debug registers"));
191 /* For some mysterious reason, some of the reserved bits in the
192 debug control register get set. Mask these off, otherwise the
193 ptrace call below will fail. */
194 DBREG_DRX ((&dbregs), 7) &= ~(0xffffffff0000fc00);
196 DBREG_DRX ((&dbregs), regnum) = value;
198 if (ptrace (PT_SETDBREGS, ptid_get_pid (inferior_ptid),
199 (PTRACE_TYPE_ARG3) &dbregs, 0) == -1)
200 perror_with_name (_("Couldn't write debug registers"));
204 amd64bsd_dr_set_control (unsigned long control)
206 amd64bsd_dr_set (7, control);
210 amd64bsd_dr_set_addr (int regnum, CORE_ADDR addr)
212 gdb_assert (regnum >= 0 && regnum <= 4);
214 amd64bsd_dr_set (regnum, addr);
218 amd64bsd_dr_get_addr (int regnum)
220 return amd64bsd_dr_get (inferior_ptid, regnum);
224 amd64bsd_dr_get_status (void)
226 return amd64bsd_dr_get (inferior_ptid, 6);
230 amd64bsd_dr_get_control (void)
232 return amd64bsd_dr_get (inferior_ptid, 7);
235 #endif /* PT_GETDBREGS */