1 /* Native-dependent code for Motorola 68000 BSD's.
3 Copyright (C) 2004, 2007, 2008, 2009, 2010, 2011
4 Free Software Foundation, Inc.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>. */
26 #include "gdb_assert.h"
27 #include <sys/types.h>
28 #include <sys/ptrace.h>
29 #include <machine/reg.h>
31 #include "m68k-tdep.h"
32 #include "inf-ptrace.h"
35 m68kbsd_gregset_supplies_p (int regnum
)
37 return (regnum
>= M68K_D0_REGNUM
&& regnum
<= M68K_PC_REGNUM
);
41 m68kbsd_fpregset_supplies_p (int regnum
)
43 return (regnum
>= M68K_FP0_REGNUM
&& regnum
<= M68K_FPI_REGNUM
);
46 /* Supply the general-purpose registers stored in GREGS to REGCACHE. */
49 m68kbsd_supply_gregset (struct regcache
*regcache
, const void *gregs
)
51 const char *regs
= gregs
;
54 for (regnum
= M68K_D0_REGNUM
; regnum
<= M68K_PC_REGNUM
; regnum
++)
55 regcache_raw_supply (regcache
, regnum
, regs
+ regnum
* 4);
58 /* Supply the floating-point registers stored in FPREGS to REGCACHE. */
61 m68kbsd_supply_fpregset (struct regcache
*regcache
, const void *fpregs
)
63 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
64 const char *regs
= fpregs
;
67 for (regnum
= M68K_FP0_REGNUM
; regnum
<= M68K_FPI_REGNUM
; regnum
++)
68 regcache_raw_supply (regcache
, regnum
,
69 regs
+ m68kbsd_fpreg_offset (gdbarch
, regnum
));
72 /* Collect the general-purpose registers from REGCACHE and store them
76 m68kbsd_collect_gregset (const struct regcache
*regcache
,
77 void *gregs
, int regnum
)
82 for (i
= M68K_D0_REGNUM
; i
<= M68K_PC_REGNUM
; i
++)
84 if (regnum
== -1 || regnum
== i
)
85 regcache_raw_collect (regcache
, i
, regs
+ i
* 4);
89 /* Collect the floating-point registers from REGCACHE and store them
93 m68kbsd_collect_fpregset (struct regcache
*regcache
,
94 void *fpregs
, int regnum
)
96 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
100 for (i
= M68K_FP0_REGNUM
; i
<= M68K_FPI_REGNUM
; i
++)
102 if (regnum
== -1 || regnum
== i
)
103 regcache_raw_collect (regcache
, i
,
104 regs
+ m68kbsd_fpreg_offset (gdbarch
, i
));
109 /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this
110 for all registers (including the floating-point registers). */
113 m68kbsd_fetch_inferior_registers (struct target_ops
*ops
,
114 struct regcache
*regcache
, int regnum
)
116 if (regnum
== -1 || m68kbsd_gregset_supplies_p (regnum
))
120 if (ptrace (PT_GETREGS
, PIDGET (inferior_ptid
),
121 (PTRACE_TYPE_ARG3
) ®s
, 0) == -1)
122 perror_with_name (_("Couldn't get registers"));
124 m68kbsd_supply_gregset (regcache
, ®s
);
127 if (regnum
== -1 || m68kbsd_fpregset_supplies_p (regnum
))
131 if (ptrace (PT_GETFPREGS
, PIDGET (inferior_ptid
),
132 (PTRACE_TYPE_ARG3
) &fpregs
, 0) == -1)
133 perror_with_name (_("Couldn't get floating point status"));
135 m68kbsd_supply_fpregset (regcache
, &fpregs
);
139 /* Store register REGNUM back into the inferior. If REGNUM is -1, do
140 this for all registers (including the floating-point registers). */
143 m68kbsd_store_inferior_registers (struct target_ops
*ops
,
144 struct regcache
*regcache
, int regnum
)
146 if (regnum
== -1 || m68kbsd_gregset_supplies_p (regnum
))
150 if (ptrace (PT_GETREGS
, PIDGET (inferior_ptid
),
151 (PTRACE_TYPE_ARG3
) ®s
, 0) == -1)
152 perror_with_name (_("Couldn't get registers"));
154 m68kbsd_collect_gregset (regcache
, ®s
, regnum
);
156 if (ptrace (PT_SETREGS
, PIDGET (inferior_ptid
),
157 (PTRACE_TYPE_ARG3
) ®s
, 0) == -1)
158 perror_with_name (_("Couldn't write registers"));
161 if (regnum
== -1 || m68kbsd_fpregset_supplies_p (regnum
))
165 if (ptrace (PT_GETFPREGS
, PIDGET (inferior_ptid
),
166 (PTRACE_TYPE_ARG3
) &fpregs
, 0) == -1)
167 perror_with_name (_("Couldn't get floating point status"));
169 m68kbsd_collect_fpregset (regcache
, &fpregs
, regnum
);
171 if (ptrace (PT_SETFPREGS
, PIDGET (inferior_ptid
),
172 (PTRACE_TYPE_ARG3
) &fpregs
, 0) == -1)
173 perror_with_name (_("Couldn't write floating point status"));
178 /* Support for debugging kernel virtual memory images. */
180 #include <sys/types.h>
181 #include <machine/pcb.h>
185 /* OpenBSD doesn't have these. */
187 #define PCB_REGS_FP 10
190 #define PCB_REGS_SP 11
194 m68kbsd_supply_pcb (struct regcache
*regcache
, struct pcb
*pcb
)
199 /* The following is true for NetBSD 1.6.2:
201 The pcb contains %d2...%d7, %a2...%a7 and %ps. This accounts for
202 all callee-saved registers. From this information we reconstruct
203 the register state as it would look when we just returned from
206 /* The stack pointer shouldn't be zero. */
207 if (pcb
->pcb_regs
[PCB_REGS_SP
] == 0)
210 for (regnum
= M68K_D2_REGNUM
; regnum
<= M68K_D7_REGNUM
; regnum
++)
211 regcache_raw_supply (regcache
, regnum
, &pcb
->pcb_regs
[i
++]);
212 for (regnum
= M68K_A2_REGNUM
; regnum
<= M68K_SP_REGNUM
; regnum
++)
213 regcache_raw_supply (regcache
, regnum
, &pcb
->pcb_regs
[i
++]);
215 tmp
= pcb
->pcb_ps
& 0xffff;
216 regcache_raw_supply (regcache
, M68K_PS_REGNUM
, &tmp
);
218 read_memory (pcb
->pcb_regs
[PCB_REGS_FP
] + 4, (char *) &tmp
, sizeof tmp
);
219 regcache_raw_supply (regcache
, M68K_PC_REGNUM
, &tmp
);
225 /* Provide a prototype to silence -Wmissing-prototypes. */
226 void _initialize_m68kbsd_nat (void);
229 _initialize_m68kbsd_nat (void)
231 struct target_ops
*t
;
233 t
= inf_ptrace_target ();
234 t
->to_fetch_registers
= m68kbsd_fetch_inferior_registers
;
235 t
->to_store_registers
= m68kbsd_store_inferior_registers
;
238 /* Support debugging kernel virtual memory images. */
239 bsd_kvm_add_target (m68kbsd_supply_pcb
);