1 /* GNU/Linux/SH specific low level interface, for the remote server for GDB.
2 Copyright (C) 1995-2018 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 /* Defined in auto-generated file reg-sh.c. */
23 void init_registers_sh (void);
24 extern const struct target_desc *tdesc_sh;
30 #include <asm/ptrace.h>
32 #define sh_num_regs 41
34 /* Currently, don't check/send MQ. */
35 static int sh_regmap[] = {
36 0, 4, 8, 12, 16, 20, 24, 28,
37 32, 36, 40, 44, 48, 52, 56, 60,
39 REG_PC*4, REG_PR*4, REG_GBR*4, -1,
40 REG_MACH*4, REG_MACL*4, REG_SR*4,
41 REG_FPUL*4, REG_FPSCR*4,
43 REG_FPREG0*4+0, REG_FPREG0*4+4, REG_FPREG0*4+8, REG_FPREG0*4+12,
44 REG_FPREG0*4+16, REG_FPREG0*4+20, REG_FPREG0*4+24, REG_FPREG0*4+28,
45 REG_FPREG0*4+32, REG_FPREG0*4+36, REG_FPREG0*4+40, REG_FPREG0*4+44,
46 REG_FPREG0*4+48, REG_FPREG0*4+52, REG_FPREG0*4+56, REG_FPREG0*4+60,
50 sh_cannot_store_register (int regno)
56 sh_cannot_fetch_register (int regno)
61 /* Correct in either endianness, obviously. */
62 static const unsigned short sh_breakpoint = 0xc3c3;
63 #define sh_breakpoint_len 2
65 /* Implementation of linux_target_ops method "sw_breakpoint_from_kind". */
67 static const gdb_byte *
68 sh_sw_breakpoint_from_kind (int kind, int *size)
70 *size = sh_breakpoint_len;
71 return (const gdb_byte *) &sh_breakpoint;
75 sh_breakpoint_at (CORE_ADDR where)
79 (*the_target->read_memory) (where, (unsigned char *) &insn, 2);
80 if (insn == sh_breakpoint)
83 /* If necessary, recognize more trap instructions here. GDB only uses the
88 /* Support for hardware single step. */
91 sh_supports_hardware_single_step (void)
96 /* Provide only a fill function for the general register set. ps_lgetregs
97 will use this for NPTL support. */
99 static void sh_fill_gregset (struct regcache *regcache, void *buf)
103 for (i = 0; i < 23; i++)
104 if (sh_regmap[i] != -1)
105 collect_register (regcache, i, (char *) buf + sh_regmap[i]);
108 static struct regset_info sh_regsets[] = {
109 { 0, 0, 0, 0, GENERAL_REGS, sh_fill_gregset, NULL },
113 static struct regsets_info sh_regsets_info =
115 sh_regsets, /* regsets */
117 NULL, /* disabled_regsets */
120 static struct usrregs_info sh_usrregs_info =
126 static struct regs_info regs_info =
128 NULL, /* regset_bitmap */
133 static const struct regs_info *
142 current_process ()->tdesc = tdesc_sh;
145 struct linux_target_ops the_low_target = {
148 sh_cannot_fetch_register,
149 sh_cannot_store_register,
150 NULL, /* fetch_register */
153 NULL, /* breakpoint_kind_from_pc */
154 sh_sw_breakpoint_from_kind,
158 NULL, /* supports_z_point_type */
159 NULL, /* insert_point */
160 NULL, /* remove_point */
161 NULL, /* stopped_by_watchpoint */
162 NULL, /* stopped_data_address */
163 NULL, /* collect_ptrace_register */
164 NULL, /* supply_ptrace_register */
165 NULL, /* siginfo_fixup */
166 NULL, /* new_process */
167 NULL, /* delete_process */
168 NULL, /* new_thread */
169 NULL, /* delete_thread */
171 NULL, /* prepare_to_resume */
172 NULL, /* process_qsupported */
173 NULL, /* supports_tracepoints */
174 NULL, /* get_thread_area */
175 NULL, /* install_fast_tracepoint_jump_pad */
177 NULL, /* get_min_fast_tracepoint_insn_len */
178 NULL, /* supports_range_stepping */
179 NULL, /* breakpoint_kind_from_current_state */
180 sh_supports_hardware_single_step,
184 initialize_low_arch (void)
186 init_registers_sh ();
188 initialize_regsets_info (&sh_regsets_info);