1 /* Native-dependent code for GNU/Linux TILE-Gx.
3 Copyright (C) 2012-2013 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"
26 #include <sys/ptrace.h>
28 #include "gdb_assert.h"
29 #include "gdb_string.h"
31 #include <sys/procfs.h>
33 #include "gdb_proc_service.h"
34 #include <sys/ptrace.h>
36 /* Prototypes for supply_gregset etc. */
39 /* Defines ps_err_e, struct ps_prochandle. */
40 #include "gdb_proc_service.h"
42 /* The register sets used in GNU/Linux ELF core-dumps are identical to
43 the register sets in `struct user' that is used for a.out
44 core-dumps, and is also used by `ptrace'. The corresponding types
45 are `elf_gregset_t' for the general-purpose registers (with
46 `elf_greg_t' the type of a single GP register) and `elf_fpregset_t'
47 for the floating-point registers.
49 Those types used to be available under the names `gregset_t' and
50 `fpregset_t' too, and this file used those names in the past. But
51 those names are now used for the register sets used in the
52 `mcontext_t' type, and have a different size and layout. */
54 /* Mapping between the general-purpose registers in `struct user'
55 format and GDB's register array layout. Note that we map the
56 first 56 registers (0 thru 55) one-to-one. GDB maps the pc to
57 slot 64, but ptrace returns it in slot 56. */
58 static const int regmap[] =
60 0, 1, 2, 3, 4, 5, 6, 7,
61 8, 9, 10, 11, 12, 13, 14, 15,
62 16, 17, 18, 19, 20, 21, 22, 23,
63 24, 25, 26, 27, 28, 29, 30, 31,
64 32, 33, 34, 35, 36, 37, 38, 39,
65 40, 41, 42, 43, 44, 45, 46, 47,
66 48, 49, 50, 51, 52, 53, 54, 55,
67 -1, -1, -1, -1, -1, -1, -1, -1,
71 /* Transfering the general-purpose registers between GDB, inferiors
74 /* Fill GDB's register array with the general-purpose register values
78 supply_gregset (struct regcache* regcache,
79 const elf_gregset_t *gregsetp)
81 elf_greg_t *regp = (elf_greg_t *) gregsetp;
84 for (i = 0; i < sizeof (regmap) / sizeof (regmap[0]); i++)
86 regcache_raw_supply (regcache, i, regp + regmap[i]);
89 /* Fill registers in *GREGSETPS with the values in GDB's
93 fill_gregset (const struct regcache* regcache,
94 elf_gregset_t *gregsetp, int regno)
96 elf_greg_t *regp = (elf_greg_t *) gregsetp;
99 for (i = 0; i < sizeof (regmap) / sizeof (regmap[0]); i++)
101 regcache_raw_collect (regcache, i, regp + regmap[i]);
104 /* Transfering floating-point registers between GDB, inferiors and cores. */
106 /* Fill GDB's register array with the floating-point register values in
110 supply_fpregset (struct regcache *regcache,
111 const elf_fpregset_t *fpregsetp)
113 /* NOTE: There are no floating-point registers for TILE-Gx. */
116 /* Fill register REGNO (if it is a floating-point register) in
117 *FPREGSETP with the value in GDB's register array. If REGNO is -1,
118 do this for all registers. */
121 fill_fpregset (const struct regcache *regcache,
122 elf_fpregset_t *fpregsetp, int regno)
124 /* NOTE: There are no floating-point registers for TILE-Gx. */
127 /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this
128 for all registers. */
131 fetch_inferior_registers (struct target_ops *ops,
132 struct regcache *regcache, int regnum)
137 tid = ptid_get_lwp (inferior_ptid);
139 tid = ptid_get_pid (inferior_ptid);
141 if (ptrace (PTRACE_GETREGS, tid, 0, (PTRACE_TYPE_ARG3) ®s) < 0)
142 perror_with_name (_("Couldn't get registers"));
144 supply_gregset (regcache, (const elf_gregset_t *)®s);
147 /* Store register REGNUM back into the inferior. If REGNUM is -1, do
148 this for all registers. */
151 store_inferior_registers (struct target_ops *ops,
152 struct regcache *regcache, int regnum)
157 tid = ptid_get_lwp (inferior_ptid);
159 tid = ptid_get_pid (inferior_ptid);
161 if (ptrace (PTRACE_GETREGS, tid, 0, (PTRACE_TYPE_ARG3) ®s) < 0)
162 perror_with_name (_("Couldn't get registers"));
164 fill_gregset (regcache, ®s, regnum);
166 if (ptrace (PTRACE_SETREGS, tid, 0, (PTRACE_TYPE_ARG3) ®s) < 0)
167 perror_with_name (_("Couldn't write registers"));
171 extern initialize_file_ftype _initialize_tile_linux_nat;
174 _initialize_tile_linux_nat (void)
176 struct target_ops *t;
178 /* Fill in the generic GNU/Linux methods. */
181 /* Add our register access methods. */
182 t->to_fetch_registers = fetch_inferior_registers;
183 t->to_store_registers = store_inferior_registers;
185 /* Register the target. */
186 linux_nat_add_target (t);