1 /* GNU/Linux/SH specific low level interface, for the remote server for GDB.
2 Copyright (C) 1995-2020 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>. */
20 #include "linux-low.h"
22 /* Linux target op definitions for the SH architecture. */
24 class sh_target
: public linux_process_target
30 void low_arch_setup () override
;
33 /* The singleton target ops object. */
35 static sh_target the_sh_target
;
37 /* Defined in auto-generated file reg-sh.c. */
38 void init_registers_sh (void);
39 extern const struct target_desc
*tdesc_sh
;
45 #include <asm/ptrace.h>
47 #define sh_num_regs 41
49 /* Currently, don't check/send MQ. */
50 static int sh_regmap
[] = {
51 0, 4, 8, 12, 16, 20, 24, 28,
52 32, 36, 40, 44, 48, 52, 56, 60,
54 REG_PC
*4, REG_PR
*4, REG_GBR
*4, -1,
55 REG_MACH
*4, REG_MACL
*4, REG_SR
*4,
56 REG_FPUL
*4, REG_FPSCR
*4,
58 REG_FPREG0
*4+0, REG_FPREG0
*4+4, REG_FPREG0
*4+8, REG_FPREG0
*4+12,
59 REG_FPREG0
*4+16, REG_FPREG0
*4+20, REG_FPREG0
*4+24, REG_FPREG0
*4+28,
60 REG_FPREG0
*4+32, REG_FPREG0
*4+36, REG_FPREG0
*4+40, REG_FPREG0
*4+44,
61 REG_FPREG0
*4+48, REG_FPREG0
*4+52, REG_FPREG0
*4+56, REG_FPREG0
*4+60,
65 sh_cannot_store_register (int regno
)
71 sh_cannot_fetch_register (int regno
)
76 /* Correct in either endianness, obviously. */
77 static const unsigned short sh_breakpoint
= 0xc3c3;
78 #define sh_breakpoint_len 2
80 /* Implementation of linux_target_ops method "sw_breakpoint_from_kind". */
82 static const gdb_byte
*
83 sh_sw_breakpoint_from_kind (int kind
, int *size
)
85 *size
= sh_breakpoint_len
;
86 return (const gdb_byte
*) &sh_breakpoint
;
90 sh_breakpoint_at (CORE_ADDR where
)
94 the_target
->read_memory (where
, (unsigned char *) &insn
, 2);
95 if (insn
== sh_breakpoint
)
98 /* If necessary, recognize more trap instructions here. GDB only uses the
103 /* Support for hardware single step. */
106 sh_supports_hardware_single_step (void)
111 /* Provide only a fill function for the general register set. ps_lgetregs
112 will use this for NPTL support. */
114 static void sh_fill_gregset (struct regcache
*regcache
, void *buf
)
118 for (i
= 0; i
< 23; i
++)
119 if (sh_regmap
[i
] != -1)
120 collect_register (regcache
, i
, (char *) buf
+ sh_regmap
[i
]);
123 static struct regset_info sh_regsets
[] = {
124 { 0, 0, 0, 0, GENERAL_REGS
, sh_fill_gregset
, NULL
},
128 static struct regsets_info sh_regsets_info
=
130 sh_regsets
, /* regsets */
132 NULL
, /* disabled_regsets */
135 static struct usrregs_info sh_usrregs_info
=
141 static struct regs_info regs_info
=
143 NULL
, /* regset_bitmap */
148 static const struct regs_info
*
155 sh_target::low_arch_setup ()
157 current_process ()->tdesc
= tdesc_sh
;
160 struct linux_target_ops the_low_target
= {
162 sh_cannot_fetch_register
,
163 sh_cannot_store_register
,
164 NULL
, /* fetch_register */
167 NULL
, /* breakpoint_kind_from_pc */
168 sh_sw_breakpoint_from_kind
,
172 NULL
, /* supports_z_point_type */
173 NULL
, /* insert_point */
174 NULL
, /* remove_point */
175 NULL
, /* stopped_by_watchpoint */
176 NULL
, /* stopped_data_address */
177 NULL
, /* collect_ptrace_register */
178 NULL
, /* supply_ptrace_register */
179 NULL
, /* siginfo_fixup */
180 NULL
, /* new_process */
181 NULL
, /* delete_process */
182 NULL
, /* new_thread */
183 NULL
, /* delete_thread */
185 NULL
, /* prepare_to_resume */
186 NULL
, /* process_qsupported */
187 NULL
, /* supports_tracepoints */
188 NULL
, /* get_thread_area */
189 NULL
, /* install_fast_tracepoint_jump_pad */
191 NULL
, /* get_min_fast_tracepoint_insn_len */
192 NULL
, /* supports_range_stepping */
193 NULL
, /* breakpoint_kind_from_current_state */
194 sh_supports_hardware_single_step
,
197 /* The linux target ops object. */
199 linux_process_target
*the_linux_target
= &the_sh_target
;
202 initialize_low_arch (void)
204 init_registers_sh ();
206 initialize_regsets_info (&sh_regsets_info
);