1 /* Native-dependent code for GNU/Linux TILE-Gx.
3 Copyright (C) 2012-2017 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/>. */
24 #include "linux-nat.h"
25 #include "inf-ptrace.h"
27 #include "nat/gdb_ptrace.h"
29 #include <sys/procfs.h>
31 /* Defines ps_err_e, struct ps_prochandle. */
32 #include "gdb_proc_service.h"
34 /* Prototypes for supply_gregset etc. */
37 /* The register sets used in GNU/Linux ELF core-dumps are identical to
38 the register sets in `struct user' that is used for a.out
39 core-dumps, and is also used by `ptrace'. The corresponding types
40 are `elf_gregset_t' for the general-purpose registers (with
41 `elf_greg_t' the type of a single GP register) and `elf_fpregset_t'
42 for the floating-point registers.
44 Those types used to be available under the names `gregset_t' and
45 `fpregset_t' too, and this file used those names in the past. But
46 those names are now used for the register sets used in the
47 `mcontext_t' type, and have a different size and layout. */
49 /* Mapping between the general-purpose registers in `struct user'
50 format and GDB's register array layout. Note that we map the
51 first 56 registers (0 thru 55) one-to-one. GDB maps the pc to
52 slot 64, but ptrace returns it in slot 56. */
53 static const int regmap
[] =
55 0, 1, 2, 3, 4, 5, 6, 7,
56 8, 9, 10, 11, 12, 13, 14, 15,
57 16, 17, 18, 19, 20, 21, 22, 23,
58 24, 25, 26, 27, 28, 29, 30, 31,
59 32, 33, 34, 35, 36, 37, 38, 39,
60 40, 41, 42, 43, 44, 45, 46, 47,
61 48, 49, 50, 51, 52, 53, 54, 55,
62 -1, -1, -1, -1, -1, -1, -1, -1,
66 /* Transfering the general-purpose registers between GDB, inferiors
69 /* Fill GDB's register array with the general-purpose register values
73 supply_gregset (struct regcache
* regcache
,
74 const elf_gregset_t
*gregsetp
)
76 elf_greg_t
*regp
= (elf_greg_t
*) gregsetp
;
79 for (i
= 0; i
< sizeof (regmap
) / sizeof (regmap
[0]); i
++)
81 regcache_raw_supply (regcache
, i
, regp
+ regmap
[i
]);
84 /* Fill registers in *GREGSETPS with the values in GDB's
88 fill_gregset (const struct regcache
* regcache
,
89 elf_gregset_t
*gregsetp
, int regno
)
91 elf_greg_t
*regp
= (elf_greg_t
*) gregsetp
;
94 for (i
= 0; i
< sizeof (regmap
) / sizeof (regmap
[0]); i
++)
96 regcache_raw_collect (regcache
, i
, regp
+ regmap
[i
]);
99 /* Transfering floating-point registers between GDB, inferiors and cores. */
101 /* Fill GDB's register array with the floating-point register values in
105 supply_fpregset (struct regcache
*regcache
,
106 const elf_fpregset_t
*fpregsetp
)
108 /* NOTE: There are no floating-point registers for TILE-Gx. */
111 /* Fill register REGNO (if it is a floating-point register) in
112 *FPREGSETP with the value in GDB's register array. If REGNO is -1,
113 do this for all registers. */
116 fill_fpregset (const struct regcache
*regcache
,
117 elf_fpregset_t
*fpregsetp
, int regno
)
119 /* NOTE: There are no floating-point registers for TILE-Gx. */
122 /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this
123 for all registers. */
126 fetch_inferior_registers (struct target_ops
*ops
,
127 struct regcache
*regcache
, int regnum
)
130 pid_t tid
= get_ptrace_pid (regcache_get_ptid (regcache
));
132 if (ptrace (PTRACE_GETREGS
, tid
, 0, (PTRACE_TYPE_ARG3
) ®s
) < 0)
133 perror_with_name (_("Couldn't get registers"));
135 supply_gregset (regcache
, (const elf_gregset_t
*)®s
);
138 /* Store register REGNUM back into the inferior. If REGNUM is -1, do
139 this for all registers. */
142 store_inferior_registers (struct target_ops
*ops
,
143 struct regcache
*regcache
, int regnum
)
146 pid_t tid
= get_ptrace_pid (regcache_get_ptid (regcache
));
148 if (ptrace (PTRACE_GETREGS
, tid
, 0, (PTRACE_TYPE_ARG3
) ®s
) < 0)
149 perror_with_name (_("Couldn't get registers"));
151 fill_gregset (regcache
, ®s
, regnum
);
153 if (ptrace (PTRACE_SETREGS
, tid
, 0, (PTRACE_TYPE_ARG3
) ®s
) < 0)
154 perror_with_name (_("Couldn't write registers"));
158 _initialize_tile_linux_nat (void)
160 struct target_ops
*t
;
162 /* Fill in the generic GNU/Linux methods. */
165 /* Add our register access methods. */
166 t
->to_fetch_registers
= fetch_inferior_registers
;
167 t
->to_store_registers
= store_inferior_registers
;
169 /* Register the target. */
170 linux_nat_add_target (t
);
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