1 /* Native-dependent code for Alpha BSD's.
3 Copyright (C) 2000-2019 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/>. */
22 /* Standard C includes. */
23 #include <machine/reg.h>
24 #ifdef HAVE_SYS_PROCFS_H
25 #include <sys/procfs.h>
27 #include <sys/ptrace.h>
28 #include <sys/types.h>
30 /* Local non-gdb includes. */
31 #include "alpha-bsd-tdep.h"
32 #include "alpha-tdep.h"
33 #include "inf-ptrace.h"
37 #ifndef HAVE_GREGSET_T
38 typedef struct reg gregset_t
;
41 #ifndef HAVE_FPREGSET_T
42 typedef struct fpreg fpregset_t
;
47 struct alpha_bsd_nat_target final
: public inf_ptrace_target
49 void fetch_registers (struct regcache
*, int) override
;
50 void store_registers (struct regcache
*, int) override
;
53 static alpha_bsd_nat_target the_alpha_bsd_nat_target
;
55 /* Provide *regset() wrappers around the generic Alpha BSD register
56 supply/fill routines. */
59 supply_gregset (struct regcache
*regcache
, const gregset_t
*gregsetp
)
61 alphabsd_supply_reg (regcache
, (const char *) gregsetp
, -1);
65 fill_gregset (const struct regcache
*regcache
, gregset_t
*gregsetp
, int regno
)
67 alphabsd_fill_reg (regcache
, (char *) gregsetp
, regno
);
71 supply_fpregset (struct regcache
*regcache
, const fpregset_t
*fpregsetp
)
73 alphabsd_supply_fpreg (regcache
, (const char *) fpregsetp
, -1);
77 fill_fpregset (const struct regcache
*regcache
,
78 fpregset_t
*fpregsetp
, int regno
)
80 alphabsd_fill_fpreg (regcache
, (char *) fpregsetp
, regno
);
83 /* Determine if PT_GETREGS fetches this register. */
86 getregs_supplies (int regno
)
88 return ((regno
>= ALPHA_V0_REGNUM
&& regno
<= ALPHA_ZERO_REGNUM
)
89 || regno
>= ALPHA_PC_REGNUM
);
92 /* Fetch register REGNO from the inferior. If REGNO is -1, do this
93 for all registers (including the floating point registers). */
96 alpha_bsd_nat_target::fetch_registers (struct regcache
*regcache
, int regno
)
98 if (regno
== -1 || getregs_supplies (regno
))
102 if (ptrace (PT_GETREGS
, regcache
->ptid ().pid (),
103 (PTRACE_TYPE_ARG3
) &gregs
, 0) == -1)
104 perror_with_name (_("Couldn't get registers"));
106 alphabsd_supply_reg (regcache
, (char *) &gregs
, regno
);
112 || regno
>= gdbarch_fp0_regnum (regcache
->arch ()))
116 if (ptrace (PT_GETFPREGS
, regcache
->ptid ().pid (),
117 (PTRACE_TYPE_ARG3
) &fpregs
, 0) == -1)
118 perror_with_name (_("Couldn't get floating point status"));
120 alphabsd_supply_fpreg (regcache
, (char *) &fpregs
, regno
);
124 /* Store register REGNO back into the inferior. If REGNO is -1, do
125 this for all registers (including the floating point registers). */
128 alpha_bsd_nat_target::store_registers (struct regcache
*regcache
, int regno
)
130 if (regno
== -1 || getregs_supplies (regno
))
133 if (ptrace (PT_GETREGS
, regcache
->ptid ().pid (),
134 (PTRACE_TYPE_ARG3
) &gregs
, 0) == -1)
135 perror_with_name (_("Couldn't get registers"));
137 alphabsd_fill_reg (regcache
, (char *) &gregs
, regno
);
139 if (ptrace (PT_SETREGS
, regcache
->ptid ().pid (),
140 (PTRACE_TYPE_ARG3
) &gregs
, 0) == -1)
141 perror_with_name (_("Couldn't write registers"));
148 || regno
>= gdbarch_fp0_regnum (regcache
->arch ()))
152 if (ptrace (PT_GETFPREGS
, regcache
->ptid ().pid (),
153 (PTRACE_TYPE_ARG3
) &fpregs
, 0) == -1)
154 perror_with_name (_("Couldn't get floating point status"));
156 alphabsd_fill_fpreg (regcache
, (char *) &fpregs
, regno
);
158 if (ptrace (PT_SETFPREGS
, regcache
->ptid ().pid (),
159 (PTRACE_TYPE_ARG3
) &fpregs
, 0) == -1)
160 perror_with_name (_("Couldn't write floating point status"));
165 /* Support for debugging kernel virtual memory images. */
167 #include <sys/signal.h>
168 #include <machine/pcb.h>
173 alphabsd_supply_pcb (struct regcache
*regcache
, struct pcb
*pcb
)
177 /* The following is true for OpenBSD 3.9:
179 The pcb contains the register state at the context switch inside
182 /* The stack pointer shouldn't be zero. */
183 if (pcb
->pcb_hw
.apcb_ksp
== 0)
186 regcache
->raw_supply (ALPHA_SP_REGNUM
, &pcb
->pcb_hw
.apcb_ksp
);
188 for (regnum
= ALPHA_S0_REGNUM
; regnum
< ALPHA_A0_REGNUM
; regnum
++)
189 regcache
->raw_supply (regnum
, &pcb
->pcb_context
[regnum
- ALPHA_S0_REGNUM
]);
190 regcache
->raw_supply (ALPHA_RA_REGNUM
, &pcb
->pcb_context
[7]);
197 _initialize_alphabsd_nat (void)
199 add_inf_child_target (&the_alpha_bsd_nat_target
);
201 /* Support debugging kernel virtual memory images. */
202 bsd_kvm_add_target (alphabsd_supply_pcb
);