1 /* GNU/Linux/TILE-Gx specific low level interface, GDBserver.
3 Copyright (C) 2012-2020 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/>. */
21 #include "linux-low.h"
24 #include "nat/gdb_ptrace.h"
26 /* Linux target op definitions for the TILE-Gx architecture. */
28 class tile_target
: public linux_process_target
32 const regs_info
*get_regs_info () override
;
36 void low_arch_setup () override
;
38 bool low_cannot_fetch_register (int regno
) override
;
40 bool low_cannot_store_register (int regno
) override
;
43 /* The singleton target ops object. */
45 static tile_target the_tile_target
;
47 /* Defined in auto-generated file reg-tilegx.c. */
48 void init_registers_tilegx (void);
49 extern const struct target_desc
*tdesc_tilegx
;
51 /* Defined in auto-generated file reg-tilegx32.c. */
52 void init_registers_tilegx32 (void);
53 extern const struct target_desc
*tdesc_tilegx32
;
55 #define tile_num_regs 65
57 static int tile_regmap
[] =
59 0, 1, 2, 3, 4, 5, 6, 7,
60 8, 9, 10, 11, 12, 13, 14, 15,
61 16, 17, 18, 19, 20, 21, 22, 23,
62 24, 25, 26, 27, 28, 29, 30, 31,
63 32, 33, 34, 35, 36, 37, 38, 39,
64 40, 41, 42, 43, 44, 45, 46, 47,
65 48, 49, 50, 51, 52, 53, 54, 55,
66 -1, -1, -1, -1, -1, -1, -1, -1,
71 tile_target::low_cannot_fetch_register (int regno
)
73 if (regno
>= 0 && regno
< 56)
82 tile_target::low_cannot_store_register (int regno
)
84 if (regno
>= 0 && regno
< 56)
92 static uint64_t tile_breakpoint
= 0x400b3cae70166000ULL
;
93 #define tile_breakpoint_len 8
95 /* Implementation of linux_target_ops method "sw_breakpoint_from_kind". */
97 static const gdb_byte
*
98 tile_sw_breakpoint_from_kind (int kind
, int *size
)
100 *size
= tile_breakpoint_len
;
101 return (const gdb_byte
*) &tile_breakpoint
;
105 tile_breakpoint_at (CORE_ADDR where
)
109 the_target
->read_memory (where
, (unsigned char *) &insn
, 8);
110 if (insn
== tile_breakpoint
)
113 /* If necessary, recognize more trap instructions here. GDB only uses the
119 tile_fill_gregset (struct regcache
*regcache
, void *buf
)
123 for (i
= 0; i
< tile_num_regs
; i
++)
124 if (tile_regmap
[i
] != -1)
125 collect_register (regcache
, i
, ((uint_reg_t
*) buf
) + tile_regmap
[i
]);
129 tile_store_gregset (struct regcache
*regcache
, const void *buf
)
133 for (i
= 0; i
< tile_num_regs
; i
++)
134 if (tile_regmap
[i
] != -1)
135 supply_register (regcache
, i
, ((uint_reg_t
*) buf
) + tile_regmap
[i
]);
138 static struct regset_info tile_regsets
[] =
140 { PTRACE_GETREGS
, PTRACE_SETREGS
, 0, tile_num_regs
* 8,
141 GENERAL_REGS
, tile_fill_gregset
, tile_store_gregset
},
145 static struct regsets_info tile_regsets_info
=
147 tile_regsets
, /* regsets */
149 NULL
, /* disabled_regsets */
152 static struct usrregs_info tile_usrregs_info
=
158 static struct regs_info myregs_info
=
160 NULL
, /* regset_bitmap */
166 tile_target::get_regs_info ()
172 tile_target::low_arch_setup ()
174 int pid
= pid_of (current_thread
);
175 unsigned int machine
;
176 int is_elf64
= linux_pid_exe_is_elf_64_file (pid
, &machine
);
178 if (sizeof (void *) == 4)
180 error (_("Can't debug 64-bit process with 32-bit GDBserver"));
183 current_process ()->tdesc
= tdesc_tilegx32
;
185 current_process ()->tdesc
= tdesc_tilegx
;
188 /* Support for hardware single step. */
191 tile_supports_hardware_single_step (void)
197 struct linux_target_ops the_low_target
=
201 NULL
, /* breakpoint_kind_from_pc */
202 tile_sw_breakpoint_from_kind
,
206 NULL
, /* supports_z_point_type */
207 NULL
, /* insert_point */
208 NULL
, /* remove_point */
209 NULL
, /* stopped_by_watchpoint */
210 NULL
, /* stopped_data_address */
211 NULL
, /* collect_ptrace_register */
212 NULL
, /* supply_ptrace_register */
213 NULL
, /* siginfo_fixup */
214 NULL
, /* new_process */
215 NULL
, /* delete_process */
216 NULL
, /* new_thread */
217 NULL
, /* delete_thread */
219 NULL
, /* prepare_to_resume */
220 NULL
, /* process_qsupported */
221 NULL
, /* supports_tracepoints */
222 NULL
, /* get_thread_area */
223 NULL
, /* install_fast_tracepoint_jump_pad */
225 NULL
, /* get_min_fast_tracepoint_insn_len */
226 NULL
, /* supports_range_stepping */
227 NULL
, /* breakpoint_kind_from_current_state */
228 tile_supports_hardware_single_step
,
231 /* The linux target ops object. */
233 linux_process_target
*the_linux_target
= &the_tile_target
;
236 initialize_low_arch (void)
238 init_registers_tilegx32();
239 init_registers_tilegx();
241 initialize_regsets_info (&tile_regsets_info
);