2005-04-28 Andrew Cagney <cagney@gnu.org>
[deliverable/binutils-gdb.git] / gdb / ppcobsd-nat.c
1 /* Native-dependent code for OpenBSD/powerpc.
2
3 Copyright 2004, 2005 Free Software Foundation, Inc.
4
5 This file is part of GDB.
6
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 2 of the License, or
10 (at your option) any later version.
11
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.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
21
22 #include "defs.h"
23 #include "inferior.h"
24 #include "regcache.h"
25
26 #include <stddef.h>
27 #include <sys/types.h>
28 #include <sys/ptrace.h>
29 #include <machine/reg.h>
30
31 #include "ppc-tdep.h"
32 #include "ppcobsd-tdep.h"
33 #include "inf-ptrace.h"
34
35 /* OpenBSD/powerpc doesn't have PT_GETFPREGS/PT_SETFPREGS like
36 NetBSD/powerpc and FreeBSD/powerpc. */
37
38 /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this
39 for all registers. */
40
41 static void
42 ppcobsd_fetch_registers (int regnum)
43 {
44 struct reg regs;
45
46 if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
47 (PTRACE_TYPE_ARG3) &regs, 0) == -1)
48 perror_with_name (_("Couldn't get registers"));
49
50 ppcobsd_supply_gregset (&ppcobsd_gregset, current_regcache, -1,
51 &regs, sizeof regs);
52 }
53
54 /* Store register REGNUM back into the inferior. If REGNUM is -1, do
55 this for all registers. */
56
57 static void
58 ppcobsd_store_registers (int regnum)
59 {
60 struct reg regs;
61
62 if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
63 (PTRACE_TYPE_ARG3) &regs, 0) == -1)
64 perror_with_name (_("Couldn't get registers"));
65
66 ppcobsd_collect_gregset (&ppcobsd_gregset, current_regcache,
67 regnum, &regs, sizeof regs);
68
69 if (ptrace (PT_SETREGS, PIDGET (inferior_ptid),
70 (PTRACE_TYPE_ARG3) &regs, 0) == -1)
71 perror_with_name (_("Couldn't write registers"));
72 }
73 \f
74
75 /* Provide a prototype to silence -Wmissing-prototypes. */
76 void _initialize_ppcobsd_nat (void);
77
78 void
79 _initialize_ppcobsd_nat (void)
80 {
81 struct target_ops *t;
82
83 /* Add in local overrides. */
84 t = inf_ptrace_target ();
85 t->to_fetch_registers = ppcobsd_fetch_registers;
86 t->to_store_registers = ppcobsd_store_registers;
87 add_target (t);
88
89 /* General-purpose registers. */
90 ppcobsd_reg_offsets.r0_offset = offsetof (struct reg, gpr);
91 ppcobsd_reg_offsets.pc_offset = offsetof (struct reg, pc);
92 ppcobsd_reg_offsets.ps_offset = offsetof (struct reg, ps);
93 ppcobsd_reg_offsets.cr_offset = offsetof (struct reg, cnd);
94 ppcobsd_reg_offsets.lr_offset = offsetof (struct reg, lr);
95 ppcobsd_reg_offsets.ctr_offset = offsetof (struct reg, cnt);
96 ppcobsd_reg_offsets.xer_offset = offsetof (struct reg, xer);
97 ppcobsd_reg_offsets.mq_offset = offsetof (struct reg, mq);
98
99 /* Floating-point registers. */
100 ppcobsd_reg_offsets.f0_offset = offsetof (struct reg, fpr);
101 ppcobsd_reg_offsets.fpscr_offset = -1;
102
103 /* AltiVec registers. */
104 ppcobsd_reg_offsets.vr0_offset = offsetof (struct vreg, vreg);
105 ppcobsd_reg_offsets.vscr_offset = offsetof (struct vreg, vscr);
106 ppcobsd_reg_offsets.vrsave_offset = offsetof (struct vreg, vrsave);
107 }
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