1 /* Native-dependent code for Alpha BSD's.
3 Copyright (C) 2000-2020 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 3 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, see <http://www.gnu.org/licenses/>. */
20 /* We define this to get types like register_t. */
26 #include "alpha-tdep.h"
27 #include "alpha-bsd-tdep.h"
28 #include "inf-ptrace.h"
31 #include <sys/types.h>
32 #include <sys/ptrace.h>
33 #include <machine/reg.h>
35 struct alpha_bsd_nat_target final
: public nbsd_nat_target
37 void fetch_registers (struct regcache
*, int) override
;
38 void store_registers (struct regcache
*, int) override
;
41 static alpha_bsd_nat_target the_alpha_bsd_nat_target
;
43 /* Determine if PT_GETREGS fetches this register. */
46 getregs_supplies (int regno
)
48 return ((regno
>= ALPHA_V0_REGNUM
&& regno
<= ALPHA_ZERO_REGNUM
)
49 || regno
>= ALPHA_PC_REGNUM
);
52 /* Fetch register REGNO from the inferior. If REGNO is -1, do this
53 for all registers (including the floating point registers). */
56 alpha_bsd_nat_target::fetch_registers (struct regcache
*regcache
, int regno
)
58 if (regno
== -1 || getregs_supplies (regno
))
62 if (ptrace (PT_GETREGS
, regcache
->ptid ().pid (),
63 (PTRACE_TYPE_ARG3
) &gregs
, 0) == -1)
64 perror_with_name (_("Couldn't get registers"));
66 alphabsd_supply_reg (regcache
, (char *) &gregs
, regno
);
72 || regno
>= gdbarch_fp0_regnum (regcache
->arch ()))
76 if (ptrace (PT_GETFPREGS
, regcache
->ptid ().pid (),
77 (PTRACE_TYPE_ARG3
) &fpregs
, 0) == -1)
78 perror_with_name (_("Couldn't get floating point status"));
80 alphabsd_supply_fpreg (regcache
, (char *) &fpregs
, regno
);
84 /* Store register REGNO back into the inferior. If REGNO is -1, do
85 this for all registers (including the floating point registers). */
88 alpha_bsd_nat_target::store_registers (struct regcache
*regcache
, int regno
)
90 if (regno
== -1 || getregs_supplies (regno
))
93 if (ptrace (PT_GETREGS
, regcache
->ptid ().pid (),
94 (PTRACE_TYPE_ARG3
) &gregs
, 0) == -1)
95 perror_with_name (_("Couldn't get registers"));
97 alphabsd_fill_reg (regcache
, (char *) &gregs
, regno
);
99 if (ptrace (PT_SETREGS
, regcache
->ptid ().pid (),
100 (PTRACE_TYPE_ARG3
) &gregs
, 0) == -1)
101 perror_with_name (_("Couldn't write registers"));
108 || regno
>= gdbarch_fp0_regnum (regcache
->arch ()))
112 if (ptrace (PT_GETFPREGS
, regcache
->ptid ().pid (),
113 (PTRACE_TYPE_ARG3
) &fpregs
, 0) == -1)
114 perror_with_name (_("Couldn't get floating point status"));
116 alphabsd_fill_fpreg (regcache
, (char *) &fpregs
, regno
);
118 if (ptrace (PT_SETFPREGS
, regcache
->ptid ().pid (),
119 (PTRACE_TYPE_ARG3
) &fpregs
, 0) == -1)
120 perror_with_name (_("Couldn't write floating point status"));
125 /* Support for debugging kernel virtual memory images. */
127 #include <sys/signal.h>
128 #include <machine/pcb.h>
133 alphabsd_supply_pcb (struct regcache
*regcache
, struct pcb
*pcb
)
137 /* The following is true for OpenBSD 3.9:
139 The pcb contains the register state at the context switch inside
142 /* The stack pointer shouldn't be zero. */
143 if (pcb
->pcb_hw
.apcb_ksp
== 0)
146 regcache
->raw_supply (ALPHA_SP_REGNUM
, &pcb
->pcb_hw
.apcb_ksp
);
148 for (regnum
= ALPHA_S0_REGNUM
; regnum
< ALPHA_A0_REGNUM
; regnum
++)
149 regcache
->raw_supply (regnum
, &pcb
->pcb_context
[regnum
- ALPHA_S0_REGNUM
]);
150 regcache
->raw_supply (ALPHA_RA_REGNUM
, &pcb
->pcb_context
[7]);
156 void _initialize_alphabsd_nat ();
158 _initialize_alphabsd_nat ()
160 add_inf_child_target (&the_alpha_bsd_nat_target
);
162 /* Support debugging kernel virtual memory images. */
163 bsd_kvm_add_target (alphabsd_supply_pcb
);