1 /* Native-dependent code for Motorola 68000 BSD's.
3 Copyright 2004 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 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. */
27 #include "gdb_assert.h"
28 #include <sys/types.h>
29 #include <sys/ptrace.h>
30 #include <machine/reg.h>
32 #include "m68k-tdep.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 const char *regs
= fpregs
;
66 for (regnum
= M68K_FP0_REGNUM
; regnum
<= M68K_FPI_REGNUM
; regnum
++)
67 regcache_raw_supply (regcache
, regnum
,
68 regs
+ m68kbsd_fpreg_offset (regnum
));
71 /* Collect the general-purpose registers from REGCACHE and store them
75 m68kbsd_collect_gregset (const struct regcache
*regcache
,
76 void *gregs
, int regnum
)
81 for (i
= M68K_D0_REGNUM
; i
<= M68K_PC_REGNUM
; i
++)
83 if (regnum
== -1 || regnum
== i
)
84 regcache_raw_collect (regcache
, i
, regs
+ i
* 4);
88 /* Collect the floating-point registers from REGCACHE and store them
92 m68kbsd_collect_fpregset (struct regcache
*regcache
,
93 void *fpregs
, int regnum
)
98 for (i
= M68K_FP0_REGNUM
; i
<= M68K_FPI_REGNUM
; i
++)
100 if (regnum
== -1 || regnum
== i
)
101 regcache_raw_collect (regcache
, i
, regs
+ m68kbsd_fpreg_offset (i
));
106 /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this
107 for all registers (including the floating-point registers). */
110 fetch_inferior_registers (int regnum
)
112 if (regnum
== -1 || m68kbsd_gregset_supplies_p (regnum
))
116 if (ptrace (PT_GETREGS
, PIDGET (inferior_ptid
),
117 (PTRACE_TYPE_ARG3
) ®s
, 0) == -1)
118 perror_with_name ("Couldn't get registers");
120 m68kbsd_supply_gregset (current_regcache
, ®s
);
123 if (regnum
== -1 || m68kbsd_fpregset_supplies_p (regnum
))
127 if (ptrace (PT_GETFPREGS
, PIDGET (inferior_ptid
),
128 (PTRACE_TYPE_ARG3
) &fpregs
, 0) == -1)
129 perror_with_name ("Couldn't get floating point status");
131 m68kbsd_supply_fpregset (current_regcache
, &fpregs
);
135 /* Store register REGNUM back into the inferior. If REGNUM is -1, do
136 this for all registers (including the floating-point registers). */
139 store_inferior_registers (int regnum
)
141 if (regnum
== -1 || m68kbsd_gregset_supplies_p (regnum
))
145 if (ptrace (PT_GETREGS
, PIDGET (inferior_ptid
),
146 (PTRACE_TYPE_ARG3
) ®s
, 0) == -1)
147 perror_with_name ("Couldn't get registers");
149 m68kbsd_collect_gregset (current_regcache
, ®s
, regnum
);
151 if (ptrace (PT_SETREGS
, PIDGET (inferior_ptid
),
152 (PTRACE_TYPE_ARG3
) ®s
, 0) == -1)
153 perror_with_name ("Couldn't write registers");
156 if (regnum
== -1 || m68kbsd_fpregset_supplies_p (regnum
))
160 if (ptrace (PT_GETFPREGS
, PIDGET (inferior_ptid
),
161 (PTRACE_TYPE_ARG3
) &fpregs
, 0) == -1)
162 perror_with_name ("Couldn't get floating point status");
164 m68kbsd_collect_fpregset (current_regcache
, &fpregs
, regnum
);
166 if (ptrace (PT_SETFPREGS
, PIDGET (inferior_ptid
),
167 (PTRACE_TYPE_ARG3
) &fpregs
, 0) == -1)
168 perror_with_name ("Couldn't write floating point status");
173 /* Support for debugging kernel virtual memory images. */
175 #include <sys/types.h>
176 #include <machine/pcb.h>
180 /* OpenBSD doesn't have these. */
182 #define PCB_REGS_FP 10
185 #define PCB_REGS_SP 11
189 m68kbsd_supply_pcb (struct regcache
*regcache
, struct pcb
*pcb
)
194 /* The following is true for NetBSD 1.6.2:
196 The pcb contains %d2...%d7, %a2...%a7 and %ps. This accounts for
197 all callee-saved registers. From this information we reconstruct
198 the register state as it would look when we just returned from
201 /* The stack pointer shouldn't be zero. */
202 if (pcb
->pcb_regs
[PCB_REGS_SP
] == 0)
205 for (regnum
= M68K_D2_REGNUM
; regnum
<= M68K_D7_REGNUM
; regnum
++)
206 regcache_raw_supply (regcache
, regnum
, &pcb
->pcb_regs
[i
++]);
207 for (regnum
= M68K_A2_REGNUM
; regnum
<= M68K_SP_REGNUM
; regnum
++)
208 regcache_raw_supply (regcache
, regnum
, &pcb
->pcb_regs
[i
++]);
210 tmp
= pcb
->pcb_ps
& 0xffff;
211 regcache_raw_supply (regcache
, M68K_PS_REGNUM
, &tmp
);
213 read_memory (pcb
->pcb_regs
[PCB_REGS_FP
] + 4, (char *) &tmp
, sizeof tmp
);
214 regcache_raw_supply (regcache
, M68K_PC_REGNUM
, &tmp
);
220 /* Provide a prototype to silence -Wmissing-prototypes. */
221 void _initialize_m68kbsd_nat (void);
224 _initialize_m68kbsd_nat (void)
226 /* Support debugging kernel virtual memory images. */
227 bsd_kvm_add_target (m68kbsd_supply_pcb
);
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