1 /* Native-dependent code for GNU/Linux TILE-Gx.
3 Copyright (C) 2012-2018 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 class tilegx_linux_nat_target final : public linux_nat_target
40 /* Add our register access methods. */
41 void fetch_registers (struct regcache *, int) override;
42 void store_registers (struct regcache *, int) override;
45 static tilegx_linux_nat_target the_tilegx_linux_nat_target;
47 /* The register sets used in GNU/Linux ELF core-dumps are identical to
48 the register sets in `struct user' that is used for a.out
49 core-dumps, and is also used by `ptrace'. The corresponding types
50 are `elf_gregset_t' for the general-purpose registers (with
51 `elf_greg_t' the type of a single GP register) and `elf_fpregset_t'
52 for the floating-point registers.
54 Those types used to be available under the names `gregset_t' and
55 `fpregset_t' too, and this file used those names in the past. But
56 those names are now used for the register sets used in the
57 `mcontext_t' type, and have a different size and layout. */
59 /* Mapping between the general-purpose registers in `struct user'
60 format and GDB's register array layout. Note that we map the
61 first 56 registers (0 thru 55) one-to-one. GDB maps the pc to
62 slot 64, but ptrace returns it in slot 56. */
63 static const int regmap[] =
65 0, 1, 2, 3, 4, 5, 6, 7,
66 8, 9, 10, 11, 12, 13, 14, 15,
67 16, 17, 18, 19, 20, 21, 22, 23,
68 24, 25, 26, 27, 28, 29, 30, 31,
69 32, 33, 34, 35, 36, 37, 38, 39,
70 40, 41, 42, 43, 44, 45, 46, 47,
71 48, 49, 50, 51, 52, 53, 54, 55,
72 -1, -1, -1, -1, -1, -1, -1, -1,
76 /* Transfering the general-purpose registers between GDB, inferiors
79 /* Fill GDB's register array with the general-purpose register values
83 supply_gregset (struct regcache* regcache,
84 const elf_gregset_t *gregsetp)
86 elf_greg_t *regp = (elf_greg_t *) gregsetp;
89 for (i = 0; i < sizeof (regmap) / sizeof (regmap[0]); i++)
91 regcache_raw_supply (regcache, i, regp + regmap[i]);
94 /* Fill registers in *GREGSETPS with the values in GDB's
98 fill_gregset (const struct regcache* regcache,
99 elf_gregset_t *gregsetp, int regno)
101 elf_greg_t *regp = (elf_greg_t *) gregsetp;
104 for (i = 0; i < sizeof (regmap) / sizeof (regmap[0]); i++)
106 regcache_raw_collect (regcache, i, regp + regmap[i]);
109 /* Transfering floating-point registers between GDB, inferiors and cores. */
111 /* Fill GDB's register array with the floating-point register values in
115 supply_fpregset (struct regcache *regcache,
116 const elf_fpregset_t *fpregsetp)
118 /* NOTE: There are no floating-point registers for TILE-Gx. */
121 /* Fill register REGNO (if it is a floating-point register) in
122 *FPREGSETP with the value in GDB's register array. If REGNO is -1,
123 do this for all registers. */
126 fill_fpregset (const struct regcache *regcache,
127 elf_fpregset_t *fpregsetp, int regno)
129 /* NOTE: There are no floating-point registers for TILE-Gx. */
132 /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this
133 for all registers. */
136 tilegx_linux_nat_target::fetch_registers (struct regcache *regcache,
140 pid_t tid = get_ptrace_pid (regcache_get_ptid (regcache));
142 if (ptrace (PTRACE_GETREGS, tid, 0, (PTRACE_TYPE_ARG3) ®s) < 0)
143 perror_with_name (_("Couldn't get registers"));
145 supply_gregset (regcache, (const elf_gregset_t *)®s);
148 /* Store register REGNUM back into the inferior. If REGNUM is -1, do
149 this for all registers. */
152 tilegx_linux_nat_target::store_registers (struct regcache *regcache,
156 pid_t tid = get_ptrace_pid (regcache_get_ptid (regcache));
158 if (ptrace (PTRACE_GETREGS, tid, 0, (PTRACE_TYPE_ARG3) ®s) < 0)
159 perror_with_name (_("Couldn't get registers"));
161 fill_gregset (regcache, ®s, regnum);
163 if (ptrace (PTRACE_SETREGS, tid, 0, (PTRACE_TYPE_ARG3) ®s) < 0)
164 perror_with_name (_("Couldn't write registers"));
168 _initialize_tile_linux_nat (void)
170 linux_target = &the_tilegx_linux_nat_target;
171 add_inf_child_target (&the_tilegx_linux_nat_target);