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_ARG3_TYPE) ®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_ARG3_TYPE) &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_ARG3_TYPE) ®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_ARG3_TYPE) ®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_ARG3_TYPE) &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_ARG3_TYPE) &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);