Commit | Line | Data |
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0a30fbc4 | 1 | /* GNU/Linux/SH specific low level interface, for the remote server for GDB. |
b811d2c2 | 2 | Copyright (C) 1995-2020 Free Software Foundation, Inc. |
0a30fbc4 DJ |
3 | |
4 | This file is part of GDB. | |
5 | ||
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 | |
a9762ec7 | 8 | the Free Software Foundation; either version 3 of the License, or |
0a30fbc4 DJ |
9 | (at your option) any later version. |
10 | ||
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. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 17 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
0a30fbc4 DJ |
18 | |
19 | #include "server.h" | |
58caa3dc | 20 | #include "linux-low.h" |
0a30fbc4 | 21 | |
ef0478f6 TBA |
22 | /* Linux target op definitions for the SH architecture. */ |
23 | ||
24 | class sh_target : public linux_process_target | |
25 | { | |
26 | public: | |
27 | ||
aa8d21c9 TBA |
28 | const regs_info *get_regs_info () override; |
29 | ||
3ca4edb6 TBA |
30 | const gdb_byte *sw_breakpoint_from_kind (int kind, int *size) override; |
31 | ||
797bcff5 TBA |
32 | protected: |
33 | ||
34 | void low_arch_setup () override; | |
daca57a7 TBA |
35 | |
36 | bool low_cannot_fetch_register (int regno) override; | |
37 | ||
38 | bool low_cannot_store_register (int regno) override; | |
bf9ae9d8 TBA |
39 | |
40 | bool low_supports_breakpoints () override; | |
41 | ||
42 | CORE_ADDR low_get_pc (regcache *regcache) override; | |
43 | ||
44 | void low_set_pc (regcache *regcache, CORE_ADDR newpc) override; | |
ef0478f6 TBA |
45 | }; |
46 | ||
47 | /* The singleton target ops object. */ | |
48 | ||
49 | static sh_target the_sh_target; | |
50 | ||
bf9ae9d8 TBA |
51 | bool |
52 | sh_target::low_supports_breakpoints () | |
53 | { | |
54 | return true; | |
55 | } | |
56 | ||
57 | CORE_ADDR | |
58 | sh_target::low_get_pc (regcache *regcache) | |
59 | { | |
60 | return linux_get_pc_32bit (regcache); | |
61 | } | |
62 | ||
63 | void | |
64 | sh_target::low_set_pc (regcache *regcache, CORE_ADDR pc) | |
65 | { | |
66 | linux_set_pc_32bit (regcache, pc); | |
67 | } | |
68 | ||
d05b4ac3 UW |
69 | /* Defined in auto-generated file reg-sh.c. */ |
70 | void init_registers_sh (void); | |
3aee8918 | 71 | extern const struct target_desc *tdesc_sh; |
d05b4ac3 | 72 | |
0a30fbc4 DJ |
73 | #ifdef HAVE_SYS_REG_H |
74 | #include <sys/reg.h> | |
75 | #endif | |
76 | ||
77 | #include <asm/ptrace.h> | |
78 | ||
2ec06d2e | 79 | #define sh_num_regs 41 |
0a30fbc4 DJ |
80 | |
81 | /* Currently, don't check/send MQ. */ | |
2ec06d2e | 82 | static int sh_regmap[] = { |
0a30fbc4 DJ |
83 | 0, 4, 8, 12, 16, 20, 24, 28, |
84 | 32, 36, 40, 44, 48, 52, 56, 60, | |
85 | ||
86 | REG_PC*4, REG_PR*4, REG_GBR*4, -1, | |
87 | REG_MACH*4, REG_MACL*4, REG_SR*4, | |
88 | REG_FPUL*4, REG_FPSCR*4, | |
89 | ||
c8a86edf DJ |
90 | REG_FPREG0*4+0, REG_FPREG0*4+4, REG_FPREG0*4+8, REG_FPREG0*4+12, |
91 | REG_FPREG0*4+16, REG_FPREG0*4+20, REG_FPREG0*4+24, REG_FPREG0*4+28, | |
92 | REG_FPREG0*4+32, REG_FPREG0*4+36, REG_FPREG0*4+40, REG_FPREG0*4+44, | |
93 | REG_FPREG0*4+48, REG_FPREG0*4+52, REG_FPREG0*4+56, REG_FPREG0*4+60, | |
0a30fbc4 DJ |
94 | }; |
95 | ||
daca57a7 TBA |
96 | bool |
97 | sh_target::low_cannot_store_register (int regno) | |
0a30fbc4 | 98 | { |
daca57a7 | 99 | return false; |
0a30fbc4 DJ |
100 | } |
101 | ||
daca57a7 TBA |
102 | bool |
103 | sh_target::low_cannot_fetch_register (int regno) | |
0a30fbc4 | 104 | { |
daca57a7 | 105 | return false; |
0a30fbc4 DJ |
106 | } |
107 | ||
0d62e5e8 DJ |
108 | /* Correct in either endianness, obviously. */ |
109 | static const unsigned short sh_breakpoint = 0xc3c3; | |
110 | #define sh_breakpoint_len 2 | |
111 | ||
3ca4edb6 | 112 | /* Implementation of target ops method "sw_breakpoint_from_kind". */ |
dd373349 | 113 | |
3ca4edb6 TBA |
114 | const gdb_byte * |
115 | sh_target::sw_breakpoint_from_kind (int kind, int *size) | |
dd373349 AT |
116 | { |
117 | *size = sh_breakpoint_len; | |
118 | return (const gdb_byte *) &sh_breakpoint; | |
119 | } | |
120 | ||
0d62e5e8 DJ |
121 | static int |
122 | sh_breakpoint_at (CORE_ADDR where) | |
123 | { | |
124 | unsigned short insn; | |
125 | ||
52405d85 | 126 | the_target->read_memory (where, (unsigned char *) &insn, 2); |
0d62e5e8 DJ |
127 | if (insn == sh_breakpoint) |
128 | return 1; | |
129 | ||
130 | /* If necessary, recognize more trap instructions here. GDB only uses the | |
131 | one. */ | |
132 | return 0; | |
133 | } | |
134 | ||
7d00775e AT |
135 | /* Support for hardware single step. */ |
136 | ||
137 | static int | |
138 | sh_supports_hardware_single_step (void) | |
139 | { | |
140 | return 1; | |
141 | } | |
142 | ||
0d37add9 DJ |
143 | /* Provide only a fill function for the general register set. ps_lgetregs |
144 | will use this for NPTL support. */ | |
145 | ||
442ea881 | 146 | static void sh_fill_gregset (struct regcache *regcache, void *buf) |
0d37add9 DJ |
147 | { |
148 | int i; | |
149 | ||
150 | for (i = 0; i < 23; i++) | |
151 | if (sh_regmap[i] != -1) | |
442ea881 | 152 | collect_register (regcache, i, (char *) buf + sh_regmap[i]); |
0d37add9 DJ |
153 | } |
154 | ||
3aee8918 | 155 | static struct regset_info sh_regsets[] = { |
1570b33e | 156 | { 0, 0, 0, 0, GENERAL_REGS, sh_fill_gregset, NULL }, |
50bc912a | 157 | NULL_REGSET |
0d37add9 DJ |
158 | }; |
159 | ||
3aee8918 PA |
160 | static struct regsets_info sh_regsets_info = |
161 | { | |
162 | sh_regsets, /* regsets */ | |
163 | 0, /* num_regsets */ | |
164 | NULL, /* disabled_regsets */ | |
165 | }; | |
166 | ||
167 | static struct usrregs_info sh_usrregs_info = | |
168 | { | |
169 | sh_num_regs, | |
170 | sh_regmap, | |
171 | }; | |
172 | ||
aa8d21c9 | 173 | static struct regs_info myregs_info = |
3aee8918 PA |
174 | { |
175 | NULL, /* regset_bitmap */ | |
176 | &sh_usrregs_info, | |
177 | &sh_regsets_info | |
178 | }; | |
179 | ||
aa8d21c9 TBA |
180 | const regs_info * |
181 | sh_target::get_regs_info () | |
3aee8918 | 182 | { |
aa8d21c9 | 183 | return &myregs_info; |
3aee8918 PA |
184 | } |
185 | ||
797bcff5 TBA |
186 | void |
187 | sh_target::low_arch_setup () | |
3aee8918 PA |
188 | { |
189 | current_process ()->tdesc = tdesc_sh; | |
190 | } | |
191 | ||
2ec06d2e | 192 | struct linux_target_ops the_low_target = { |
0d62e5e8 | 193 | sh_breakpoint_at, |
7d00775e AT |
194 | NULL, /* supports_z_point_type */ |
195 | NULL, /* insert_point */ | |
196 | NULL, /* remove_point */ | |
197 | NULL, /* stopped_by_watchpoint */ | |
198 | NULL, /* stopped_data_address */ | |
199 | NULL, /* collect_ptrace_register */ | |
200 | NULL, /* supply_ptrace_register */ | |
201 | NULL, /* siginfo_fixup */ | |
202 | NULL, /* new_process */ | |
04ec7890 | 203 | NULL, /* delete_process */ |
7d00775e | 204 | NULL, /* new_thread */ |
466eecee | 205 | NULL, /* delete_thread */ |
7d00775e AT |
206 | NULL, /* new_fork */ |
207 | NULL, /* prepare_to_resume */ | |
208 | NULL, /* process_qsupported */ | |
209 | NULL, /* supports_tracepoints */ | |
210 | NULL, /* get_thread_area */ | |
211 | NULL, /* install_fast_tracepoint_jump_pad */ | |
212 | NULL, /* emit_ops */ | |
213 | NULL, /* get_min_fast_tracepoint_insn_len */ | |
214 | NULL, /* supports_range_stepping */ | |
7d00775e | 215 | sh_supports_hardware_single_step, |
2ec06d2e | 216 | }; |
3aee8918 | 217 | |
ef0478f6 TBA |
218 | /* The linux target ops object. */ |
219 | ||
220 | linux_process_target *the_linux_target = &the_sh_target; | |
221 | ||
3aee8918 PA |
222 | void |
223 | initialize_low_arch (void) | |
224 | { | |
225 | init_registers_sh (); | |
226 | ||
227 | initialize_regsets_info (&sh_regsets_info); | |
228 | } |