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
;
39 /* The singleton target ops object. */
41 static tile_target the_tile_target
;
43 /* Defined in auto-generated file reg-tilegx.c. */
44 void init_registers_tilegx (void);
45 extern const struct target_desc
*tdesc_tilegx
;
47 /* Defined in auto-generated file reg-tilegx32.c. */
48 void init_registers_tilegx32 (void);
49 extern const struct target_desc
*tdesc_tilegx32
;
51 #define tile_num_regs 65
53 static int tile_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,
67 tile_cannot_fetch_register (int regno
)
69 if (regno
>= 0 && regno
< 56)
78 tile_cannot_store_register (int regno
)
80 if (regno
>= 0 && regno
< 56)
88 static uint64_t tile_breakpoint
= 0x400b3cae70166000ULL
;
89 #define tile_breakpoint_len 8
91 /* Implementation of linux_target_ops method "sw_breakpoint_from_kind". */
93 static const gdb_byte
*
94 tile_sw_breakpoint_from_kind (int kind
, int *size
)
96 *size
= tile_breakpoint_len
;
97 return (const gdb_byte
*) &tile_breakpoint
;
101 tile_breakpoint_at (CORE_ADDR where
)
105 the_target
->read_memory (where
, (unsigned char *) &insn
, 8);
106 if (insn
== tile_breakpoint
)
109 /* If necessary, recognize more trap instructions here. GDB only uses the
115 tile_fill_gregset (struct regcache
*regcache
, void *buf
)
119 for (i
= 0; i
< tile_num_regs
; i
++)
120 if (tile_regmap
[i
] != -1)
121 collect_register (regcache
, i
, ((uint_reg_t
*) buf
) + tile_regmap
[i
]);
125 tile_store_gregset (struct regcache
*regcache
, const void *buf
)
129 for (i
= 0; i
< tile_num_regs
; i
++)
130 if (tile_regmap
[i
] != -1)
131 supply_register (regcache
, i
, ((uint_reg_t
*) buf
) + tile_regmap
[i
]);
134 static struct regset_info tile_regsets
[] =
136 { PTRACE_GETREGS
, PTRACE_SETREGS
, 0, tile_num_regs
* 8,
137 GENERAL_REGS
, tile_fill_gregset
, tile_store_gregset
},
141 static struct regsets_info tile_regsets_info
=
143 tile_regsets
, /* regsets */
145 NULL
, /* disabled_regsets */
148 static struct usrregs_info tile_usrregs_info
=
154 static struct regs_info myregs_info
=
156 NULL
, /* regset_bitmap */
162 tile_target::get_regs_info ()
168 tile_target::low_arch_setup ()
170 int pid
= pid_of (current_thread
);
171 unsigned int machine
;
172 int is_elf64
= linux_pid_exe_is_elf_64_file (pid
, &machine
);
174 if (sizeof (void *) == 4)
176 error (_("Can't debug 64-bit process with 32-bit GDBserver"));
179 current_process ()->tdesc
= tdesc_tilegx32
;
181 current_process ()->tdesc
= tdesc_tilegx
;
184 /* Support for hardware single step. */
187 tile_supports_hardware_single_step (void)
193 struct linux_target_ops the_low_target
=
195 tile_cannot_fetch_register
,
196 tile_cannot_store_register
,
200 NULL
, /* breakpoint_kind_from_pc */
201 tile_sw_breakpoint_from_kind
,
205 NULL
, /* supports_z_point_type */
206 NULL
, /* insert_point */
207 NULL
, /* remove_point */
208 NULL
, /* stopped_by_watchpoint */
209 NULL
, /* stopped_data_address */
210 NULL
, /* collect_ptrace_register */
211 NULL
, /* supply_ptrace_register */
212 NULL
, /* siginfo_fixup */
213 NULL
, /* new_process */
214 NULL
, /* delete_process */
215 NULL
, /* new_thread */
216 NULL
, /* delete_thread */
218 NULL
, /* prepare_to_resume */
219 NULL
, /* process_qsupported */
220 NULL
, /* supports_tracepoints */
221 NULL
, /* get_thread_area */
222 NULL
, /* install_fast_tracepoint_jump_pad */
224 NULL
, /* get_min_fast_tracepoint_insn_len */
225 NULL
, /* supports_range_stepping */
226 NULL
, /* breakpoint_kind_from_current_state */
227 tile_supports_hardware_single_step
,
230 /* The linux target ops object. */
232 linux_process_target
*the_linux_target
= &the_tile_target
;
235 initialize_low_arch (void)
237 init_registers_tilegx32();
238 init_registers_tilegx();
240 initialize_regsets_info (&tile_regsets_info
);