1 /* Native-dependent code for GNU/Linux TILE-Gx.
3 Copyright (C) 2012-2014 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>
30 #include <sys/procfs.h>
32 /* Defines ps_err_e, struct ps_prochandle. */
33 #include "gdb_proc_service.h"
35 /* Prototypes for supply_gregset etc. */
38 /* The register sets used in GNU/Linux ELF core-dumps are identical to
39 the register sets in `struct user' that is used for a.out
40 core-dumps, and is also used by `ptrace'. The corresponding types
41 are `elf_gregset_t' for the general-purpose registers (with
42 `elf_greg_t' the type of a single GP register) and `elf_fpregset_t'
43 for the floating-point registers.
45 Those types used to be available under the names `gregset_t' and
46 `fpregset_t' too, and this file used those names in the past. But
47 those names are now used for the register sets used in the
48 `mcontext_t' type, and have a different size and layout. */
50 /* Mapping between the general-purpose registers in `struct user'
51 format and GDB's register array layout. Note that we map the
52 first 56 registers (0 thru 55) one-to-one. GDB maps the pc to
53 slot 64, but ptrace returns it in slot 56. */
54 static const int regmap[] =
56 0, 1, 2, 3, 4, 5, 6, 7,
57 8, 9, 10, 11, 12, 13, 14, 15,
58 16, 17, 18, 19, 20, 21, 22, 23,
59 24, 25, 26, 27, 28, 29, 30, 31,
60 32, 33, 34, 35, 36, 37, 38, 39,
61 40, 41, 42, 43, 44, 45, 46, 47,
62 48, 49, 50, 51, 52, 53, 54, 55,
63 -1, -1, -1, -1, -1, -1, -1, -1,
67 /* Transfering the general-purpose registers between GDB, inferiors
70 /* Fill GDB's register array with the general-purpose register values
74 supply_gregset (struct regcache* regcache,
75 const elf_gregset_t *gregsetp)
77 elf_greg_t *regp = (elf_greg_t *) gregsetp;
80 for (i = 0; i < sizeof (regmap) / sizeof (regmap[0]); i++)
82 regcache_raw_supply (regcache, i, regp + regmap[i]);
85 /* Fill registers in *GREGSETPS with the values in GDB's
89 fill_gregset (const struct regcache* regcache,
90 elf_gregset_t *gregsetp, int regno)
92 elf_greg_t *regp = (elf_greg_t *) gregsetp;
95 for (i = 0; i < sizeof (regmap) / sizeof (regmap[0]); i++)
97 regcache_raw_collect (regcache, i, regp + regmap[i]);
100 /* Transfering floating-point registers between GDB, inferiors and cores. */
102 /* Fill GDB's register array with the floating-point register values in
106 supply_fpregset (struct regcache *regcache,
107 const elf_fpregset_t *fpregsetp)
109 /* NOTE: There are no floating-point registers for TILE-Gx. */
112 /* Fill register REGNO (if it is a floating-point register) in
113 *FPREGSETP with the value in GDB's register array. If REGNO is -1,
114 do this for all registers. */
117 fill_fpregset (const struct regcache *regcache,
118 elf_fpregset_t *fpregsetp, int regno)
120 /* NOTE: There are no floating-point registers for TILE-Gx. */
123 /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this
124 for all registers. */
127 fetch_inferior_registers (struct target_ops *ops,
128 struct regcache *regcache, int regnum)
133 tid = ptid_get_lwp (inferior_ptid);
135 tid = ptid_get_pid (inferior_ptid);
137 if (ptrace (PTRACE_GETREGS, tid, 0, (PTRACE_TYPE_ARG3) ®s) < 0)
138 perror_with_name (_("Couldn't get registers"));
140 supply_gregset (regcache, (const elf_gregset_t *)®s);
143 /* Store register REGNUM back into the inferior. If REGNUM is -1, do
144 this for all registers. */
147 store_inferior_registers (struct target_ops *ops,
148 struct regcache *regcache, int regnum)
153 tid = ptid_get_lwp (inferior_ptid);
155 tid = ptid_get_pid (inferior_ptid);
157 if (ptrace (PTRACE_GETREGS, tid, 0, (PTRACE_TYPE_ARG3) ®s) < 0)
158 perror_with_name (_("Couldn't get registers"));
160 fill_gregset (regcache, ®s, regnum);
162 if (ptrace (PTRACE_SETREGS, tid, 0, (PTRACE_TYPE_ARG3) ®s) < 0)
163 perror_with_name (_("Couldn't write registers"));
167 extern initialize_file_ftype _initialize_tile_linux_nat;
170 _initialize_tile_linux_nat (void)
172 struct target_ops *t;
174 /* Fill in the generic GNU/Linux methods. */
177 /* Add our register access methods. */
178 t->to_fetch_registers = fetch_inferior_registers;
179 t->to_store_registers = store_inferior_registers;
181 /* Register the target. */
182 linux_nat_add_target (t);