1 /* Native-dependent code for PowerPC's running NetBSD, for GDB.
2 Copyright 2002 Free Software Foundation, Inc.
3 Contributed by Wasabi Systems, 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 2 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, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
22 #include <sys/types.h>
23 #include <sys/ptrace.h>
24 #include <machine/reg.h>
28 #include "gdb_assert.h"
31 #include "ppcnbsd-tdep.h"
33 /* Returns true if PT_GETREGS fetches this register. */
35 getregs_supplies (int regno
)
37 struct gdbarch_tdep
*tdep
= gdbarch_tdep (current_gdbarch
);
39 return ((regno
>= tdep
->ppc_gp0_regnum
40 && regno
< tdep
->ppc_gp0_regnum
+ ppc_num_gprs
)
41 || regno
== tdep
->ppc_lr_regnum
42 || regno
== tdep
->ppc_cr_regnum
43 || regno
== tdep
->ppc_xer_regnum
44 || regno
== tdep
->ppc_ctr_regnum
45 || regno
== PC_REGNUM
);
48 /* Like above, but for PT_GETFPREGS. */
50 getfpregs_supplies (int regno
)
52 struct gdbarch_tdep
*tdep
= gdbarch_tdep (current_gdbarch
);
54 /* FIXME: jimb/2004-05-05: Some PPC variants don't have floating
55 point registers. Traditionally, GDB's register set has still
56 listed the floating point registers for such machines, so this
57 code is harmless. However, the new E500 port actually omits the
58 floating point registers entirely from the register set --- they
59 don't even have register numbers assigned to them.
61 It's not clear to me how best to update this code, so this assert
62 will alert the first person to encounter the NetBSD/E500
63 combination to the problem. */
64 gdb_assert (ppc_floating_point_unit_p (current_gdbarch
));
66 return ((regno
>= tdep
->ppc_fp0_regnum
67 && regno
< tdep
->ppc_fp0_regnum
+ ppc_num_fprs
)
68 || regno
== tdep
->ppc_fpscr_regnum
);
72 fetch_inferior_registers (int regno
)
74 if (regno
== -1 || getregs_supplies (regno
))
78 if (ptrace (PT_GETREGS
, PIDGET (inferior_ptid
),
79 (PTRACE_ARG3_TYPE
) ®s
, 0) == -1)
80 perror_with_name ("Couldn't get registers");
82 ppcnbsd_supply_reg ((char *) ®s
, regno
);
87 if (regno
== -1 || getfpregs_supplies (regno
))
91 if (ptrace (PT_GETFPREGS
, PIDGET (inferior_ptid
),
92 (PTRACE_ARG3_TYPE
) &fpregs
, 0) == -1)
93 perror_with_name ("Couldn't get FP registers");
95 ppcnbsd_supply_fpreg ((char *) &fpregs
, regno
);
102 store_inferior_registers (int regno
)
104 if (regno
== -1 || getregs_supplies (regno
))
108 if (ptrace (PT_GETREGS
, PIDGET (inferior_ptid
),
109 (PTRACE_ARG3_TYPE
) ®s
, 0) == -1)
110 perror_with_name ("Couldn't get registers");
112 ppcnbsd_fill_reg ((char *) ®s
, regno
);
114 if (ptrace (PT_SETREGS
, PIDGET (inferior_ptid
),
115 (PTRACE_ARG3_TYPE
) ®s
, 0) == -1)
116 perror_with_name ("Couldn't write registers");
122 if (regno
== -1 || getfpregs_supplies (regno
))
126 if (ptrace (PT_GETFPREGS
, PIDGET (inferior_ptid
),
127 (PTRACE_ARG3_TYPE
) &fpregs
, 0) == -1)
128 perror_with_name ("Couldn't get FP registers");
130 ppcnbsd_fill_fpreg ((char *) &fpregs
, regno
);
132 if (ptrace (PT_SETFPREGS
, PIDGET (inferior_ptid
),
133 (PTRACE_ARG3_TYPE
) &fpregs
, 0) == -1)
134 perror_with_name ("Couldn't set FP registers");
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