1 /* Native-dependent code for Alpha BSD's.
3 Copyright (C) 2000, 2001, 2002, 2004, 2005, 2006, 2007, 2008, 2009, 2010,
4 2011 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/>. */
25 #include "alpha-tdep.h"
26 #include "alphabsd-tdep.h"
27 #include "inf-ptrace.h"
29 #include <sys/types.h>
30 #include <sys/ptrace.h>
31 #include <machine/reg.h>
33 #ifdef HAVE_SYS_PROCFS_H
34 #include <sys/procfs.h>
37 #ifndef HAVE_GREGSET_T
38 typedef struct reg gregset_t
;
41 #ifndef HAVE_FPREGSET_T
42 typedef struct fpreg fpregset_t
;
47 /* Provide *regset() wrappers around the generic Alpha BSD register
48 supply/fill routines. */
51 supply_gregset (struct regcache
*regcache
, const gregset_t
*gregsetp
)
53 alphabsd_supply_reg (regcache
, (const char *) gregsetp
, -1);
57 fill_gregset (const struct regcache
*regcache
, gregset_t
*gregsetp
, int regno
)
59 alphabsd_fill_reg (regcache
, (char *) gregsetp
, regno
);
63 supply_fpregset (struct regcache
*regcache
, const fpregset_t
*fpregsetp
)
65 alphabsd_supply_fpreg (regcache
, (const char *) fpregsetp
, -1);
69 fill_fpregset (const struct regcache
*regcache
,
70 fpregset_t
*fpregsetp
, int regno
)
72 alphabsd_fill_fpreg (regcache
, (char *) fpregsetp
, regno
);
75 /* Determine if PT_GETREGS fetches this register. */
78 getregs_supplies (int regno
)
80 return ((regno
>= ALPHA_V0_REGNUM
&& regno
<= ALPHA_ZERO_REGNUM
)
81 || regno
>= ALPHA_PC_REGNUM
);
84 /* Fetch register REGNO from the inferior. If REGNO is -1, do this
85 for all registers (including the floating point registers). */
88 alphabsd_fetch_inferior_registers (struct target_ops
*ops
,
89 struct regcache
*regcache
, int regno
)
91 if (regno
== -1 || getregs_supplies (regno
))
95 if (ptrace (PT_GETREGS
, PIDGET (inferior_ptid
),
96 (PTRACE_TYPE_ARG3
) &gregs
, 0) == -1)
97 perror_with_name (_("Couldn't get registers"));
99 alphabsd_supply_reg (regcache
, (char *) &gregs
, regno
);
105 || regno
>= gdbarch_fp0_regnum (get_regcache_arch (regcache
)))
109 if (ptrace (PT_GETFPREGS
, PIDGET (inferior_ptid
),
110 (PTRACE_TYPE_ARG3
) &fpregs
, 0) == -1)
111 perror_with_name (_("Couldn't get floating point status"));
113 alphabsd_supply_fpreg (regcache
, (char *) &fpregs
, regno
);
117 /* Store register REGNO back into the inferior. If REGNO is -1, do
118 this for all registers (including the floating point registers). */
121 alphabsd_store_inferior_registers (struct target_ops
*ops
,
122 struct regcache
*regcache
, int regno
)
124 if (regno
== -1 || getregs_supplies (regno
))
127 if (ptrace (PT_GETREGS
, PIDGET (inferior_ptid
),
128 (PTRACE_TYPE_ARG3
) &gregs
, 0) == -1)
129 perror_with_name (_("Couldn't get registers"));
131 alphabsd_fill_reg (regcache
, (char *) &gregs
, regno
);
133 if (ptrace (PT_SETREGS
, PIDGET (inferior_ptid
),
134 (PTRACE_TYPE_ARG3
) &gregs
, 0) == -1)
135 perror_with_name (_("Couldn't write registers"));
142 || regno
>= gdbarch_fp0_regnum (get_regcache_arch (regcache
)))
146 if (ptrace (PT_GETFPREGS
, PIDGET (inferior_ptid
),
147 (PTRACE_TYPE_ARG3
) &fpregs
, 0) == -1)
148 perror_with_name (_("Couldn't get floating point status"));
150 alphabsd_fill_fpreg (regcache
, (char *) &fpregs
, regno
);
152 if (ptrace (PT_SETFPREGS
, PIDGET (inferior_ptid
),
153 (PTRACE_TYPE_ARG3
) &fpregs
, 0) == -1)
154 perror_with_name (_("Couldn't write floating point status"));
159 /* Support for debugging kernel virtual memory images. */
161 #include <sys/types.h>
162 #include <sys/signal.h>
163 #include <machine/pcb.h>
168 alphabsd_supply_pcb (struct regcache
*regcache
, struct pcb
*pcb
)
172 /* The following is true for OpenBSD 3.9:
174 The pcb contains the register state at the context switch inside
177 /* The stack pointer shouldn't be zero. */
178 if (pcb
->pcb_hw
.apcb_ksp
== 0)
181 regcache_raw_supply (regcache
, ALPHA_SP_REGNUM
, &pcb
->pcb_hw
.apcb_ksp
);
183 for (regnum
= ALPHA_S0_REGNUM
; regnum
< ALPHA_A0_REGNUM
; regnum
++)
184 regcache_raw_supply (regcache
, regnum
,
185 &pcb
->pcb_context
[regnum
- ALPHA_S0_REGNUM
]);
186 regcache_raw_supply (regcache
, ALPHA_RA_REGNUM
, &pcb
->pcb_context
[7]);
192 /* Provide a prototype to silence -Wmissing-prototypes. */
193 void _initialize_alphabsd_nat (void);
196 _initialize_alphabsd_nat (void)
198 struct target_ops
*t
;
200 t
= inf_ptrace_target ();
201 t
->to_fetch_registers
= alphabsd_fetch_inferior_registers
;
202 t
->to_store_registers
= alphabsd_store_inferior_registers
;
205 /* Support debugging kernel virtual memory images. */
206 bsd_kvm_add_target (alphabsd_supply_pcb
);