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d96bf49b AB |
1 | /* |
2 | * Target specific user-mode handling | |
3 | * | |
4 | * Copyright (c) 2003-2005 Fabrice Bellard | |
5 | * Copyright (c) 2022 Linaro Ltd | |
6 | * | |
7 | * SPDX-License-Identifier: LGPL-2.0+ | |
8 | */ | |
9 | ||
10 | #include "qemu/osdep.h" | |
11 | #include "exec/gdbstub.h" | |
12 | #include "qemu.h" | |
13 | #include "internals.h" | |
14 | ||
15 | /* | |
16 | * Map target signal numbers to GDB protocol signal numbers and vice | |
17 | * versa. For user emulation's currently supported systems, we can | |
18 | * assume most signals are defined. | |
19 | */ | |
20 | ||
21 | static int gdb_signal_table[] = { | |
22 | 0, | |
23 | TARGET_SIGHUP, | |
24 | TARGET_SIGINT, | |
25 | TARGET_SIGQUIT, | |
26 | TARGET_SIGILL, | |
27 | TARGET_SIGTRAP, | |
28 | TARGET_SIGABRT, | |
29 | -1, /* SIGEMT */ | |
30 | TARGET_SIGFPE, | |
31 | TARGET_SIGKILL, | |
32 | TARGET_SIGBUS, | |
33 | TARGET_SIGSEGV, | |
34 | TARGET_SIGSYS, | |
35 | TARGET_SIGPIPE, | |
36 | TARGET_SIGALRM, | |
37 | TARGET_SIGTERM, | |
38 | TARGET_SIGURG, | |
39 | TARGET_SIGSTOP, | |
40 | TARGET_SIGTSTP, | |
41 | TARGET_SIGCONT, | |
42 | TARGET_SIGCHLD, | |
43 | TARGET_SIGTTIN, | |
44 | TARGET_SIGTTOU, | |
45 | TARGET_SIGIO, | |
46 | TARGET_SIGXCPU, | |
47 | TARGET_SIGXFSZ, | |
48 | TARGET_SIGVTALRM, | |
49 | TARGET_SIGPROF, | |
50 | TARGET_SIGWINCH, | |
51 | -1, /* SIGLOST */ | |
52 | TARGET_SIGUSR1, | |
53 | TARGET_SIGUSR2, | |
54 | #ifdef TARGET_SIGPWR | |
55 | TARGET_SIGPWR, | |
56 | #else | |
57 | -1, | |
58 | #endif | |
59 | -1, /* SIGPOLL */ | |
60 | -1, | |
61 | -1, | |
62 | -1, | |
63 | -1, | |
64 | -1, | |
65 | -1, | |
66 | -1, | |
67 | -1, | |
68 | -1, | |
69 | -1, | |
70 | -1, | |
71 | #ifdef __SIGRTMIN | |
72 | __SIGRTMIN + 1, | |
73 | __SIGRTMIN + 2, | |
74 | __SIGRTMIN + 3, | |
75 | __SIGRTMIN + 4, | |
76 | __SIGRTMIN + 5, | |
77 | __SIGRTMIN + 6, | |
78 | __SIGRTMIN + 7, | |
79 | __SIGRTMIN + 8, | |
80 | __SIGRTMIN + 9, | |
81 | __SIGRTMIN + 10, | |
82 | __SIGRTMIN + 11, | |
83 | __SIGRTMIN + 12, | |
84 | __SIGRTMIN + 13, | |
85 | __SIGRTMIN + 14, | |
86 | __SIGRTMIN + 15, | |
87 | __SIGRTMIN + 16, | |
88 | __SIGRTMIN + 17, | |
89 | __SIGRTMIN + 18, | |
90 | __SIGRTMIN + 19, | |
91 | __SIGRTMIN + 20, | |
92 | __SIGRTMIN + 21, | |
93 | __SIGRTMIN + 22, | |
94 | __SIGRTMIN + 23, | |
95 | __SIGRTMIN + 24, | |
96 | __SIGRTMIN + 25, | |
97 | __SIGRTMIN + 26, | |
98 | __SIGRTMIN + 27, | |
99 | __SIGRTMIN + 28, | |
100 | __SIGRTMIN + 29, | |
101 | __SIGRTMIN + 30, | |
102 | __SIGRTMIN + 31, | |
103 | -1, /* SIGCANCEL */ | |
104 | __SIGRTMIN, | |
105 | __SIGRTMIN + 32, | |
106 | __SIGRTMIN + 33, | |
107 | __SIGRTMIN + 34, | |
108 | __SIGRTMIN + 35, | |
109 | __SIGRTMIN + 36, | |
110 | __SIGRTMIN + 37, | |
111 | __SIGRTMIN + 38, | |
112 | __SIGRTMIN + 39, | |
113 | __SIGRTMIN + 40, | |
114 | __SIGRTMIN + 41, | |
115 | __SIGRTMIN + 42, | |
116 | __SIGRTMIN + 43, | |
117 | __SIGRTMIN + 44, | |
118 | __SIGRTMIN + 45, | |
119 | __SIGRTMIN + 46, | |
120 | __SIGRTMIN + 47, | |
121 | __SIGRTMIN + 48, | |
122 | __SIGRTMIN + 49, | |
123 | __SIGRTMIN + 50, | |
124 | __SIGRTMIN + 51, | |
125 | __SIGRTMIN + 52, | |
126 | __SIGRTMIN + 53, | |
127 | __SIGRTMIN + 54, | |
128 | __SIGRTMIN + 55, | |
129 | __SIGRTMIN + 56, | |
130 | __SIGRTMIN + 57, | |
131 | __SIGRTMIN + 58, | |
132 | __SIGRTMIN + 59, | |
133 | __SIGRTMIN + 60, | |
134 | __SIGRTMIN + 61, | |
135 | __SIGRTMIN + 62, | |
136 | __SIGRTMIN + 63, | |
137 | __SIGRTMIN + 64, | |
138 | __SIGRTMIN + 65, | |
139 | __SIGRTMIN + 66, | |
140 | __SIGRTMIN + 67, | |
141 | __SIGRTMIN + 68, | |
142 | __SIGRTMIN + 69, | |
143 | __SIGRTMIN + 70, | |
144 | __SIGRTMIN + 71, | |
145 | __SIGRTMIN + 72, | |
146 | __SIGRTMIN + 73, | |
147 | __SIGRTMIN + 74, | |
148 | __SIGRTMIN + 75, | |
149 | __SIGRTMIN + 76, | |
150 | __SIGRTMIN + 77, | |
151 | __SIGRTMIN + 78, | |
152 | __SIGRTMIN + 79, | |
153 | __SIGRTMIN + 80, | |
154 | __SIGRTMIN + 81, | |
155 | __SIGRTMIN + 82, | |
156 | __SIGRTMIN + 83, | |
157 | __SIGRTMIN + 84, | |
158 | __SIGRTMIN + 85, | |
159 | __SIGRTMIN + 86, | |
160 | __SIGRTMIN + 87, | |
161 | __SIGRTMIN + 88, | |
162 | __SIGRTMIN + 89, | |
163 | __SIGRTMIN + 90, | |
164 | __SIGRTMIN + 91, | |
165 | __SIGRTMIN + 92, | |
166 | __SIGRTMIN + 93, | |
167 | __SIGRTMIN + 94, | |
168 | __SIGRTMIN + 95, | |
169 | -1, /* SIGINFO */ | |
170 | -1, /* UNKNOWN */ | |
171 | -1, /* DEFAULT */ | |
172 | -1, | |
173 | -1, | |
174 | -1, | |
175 | -1, | |
176 | -1, | |
177 | -1 | |
178 | #endif | |
179 | }; | |
180 | ||
181 | int gdb_signal_to_target(int sig) | |
182 | { | |
183 | if (sig < ARRAY_SIZE(gdb_signal_table)) { | |
184 | return gdb_signal_table[sig]; | |
185 | } else { | |
186 | return -1; | |
187 | } | |
188 | } | |
189 | ||
190 | int gdb_target_signal_to_gdb(int sig) | |
191 | { | |
192 | int i; | |
193 | for (i = 0; i < ARRAY_SIZE(gdb_signal_table); i++) { | |
194 | if (gdb_signal_table[i] == sig) { | |
195 | return i; | |
196 | } | |
197 | } | |
198 | return GDB_SIGNAL_UNKNOWN; | |
199 | } | |
200 | ||
201 | int gdb_get_cpu_index(CPUState *cpu) | |
202 | { | |
203 | TaskState *ts = (TaskState *) cpu->opaque; | |
204 | return ts ? ts->ts_tid : -1; | |
205 | } | |
206 | ||
207 | /* | |
208 | * User-mode specific command helpers | |
209 | */ | |
210 | ||
211 | void gdb_handle_query_offsets(GArray *params, void *user_ctx) | |
212 | { | |
213 | TaskState *ts; | |
214 | ||
215 | ts = gdbserver_state.c_cpu->opaque; | |
216 | g_string_printf(gdbserver_state.str_buf, | |
217 | "Text=" TARGET_ABI_FMT_lx | |
218 | ";Data=" TARGET_ABI_FMT_lx | |
219 | ";Bss=" TARGET_ABI_FMT_lx, | |
220 | ts->info->code_offset, | |
221 | ts->info->data_offset, | |
222 | ts->info->data_offset); | |
223 | gdb_put_strbuf(); | |
224 | } | |
225 | ||
226 | #if defined(CONFIG_LINUX) | |
227 | /* Partial user only duplicate of helper in gdbstub.c */ | |
228 | static inline int target_memory_rw_debug(CPUState *cpu, target_ulong addr, | |
229 | uint8_t *buf, int len, bool is_write) | |
230 | { | |
231 | CPUClass *cc; | |
232 | cc = CPU_GET_CLASS(cpu); | |
233 | if (cc->memory_rw_debug) { | |
234 | return cc->memory_rw_debug(cpu, addr, buf, len, is_write); | |
235 | } | |
236 | return cpu_memory_rw_debug(cpu, addr, buf, len, is_write); | |
237 | } | |
238 | ||
239 | void gdb_handle_query_xfer_auxv(GArray *params, void *user_ctx) | |
240 | { | |
241 | TaskState *ts; | |
242 | unsigned long offset, len, saved_auxv, auxv_len; | |
243 | ||
244 | if (params->len < 2) { | |
245 | gdb_put_packet("E22"); | |
246 | return; | |
247 | } | |
248 | ||
249 | offset = get_param(params, 0)->val_ul; | |
250 | len = get_param(params, 1)->val_ul; | |
251 | ts = gdbserver_state.c_cpu->opaque; | |
252 | saved_auxv = ts->info->saved_auxv; | |
253 | auxv_len = ts->info->auxv_len; | |
254 | ||
255 | if (offset >= auxv_len) { | |
256 | gdb_put_packet("E00"); | |
257 | return; | |
258 | } | |
259 | ||
260 | if (len > (MAX_PACKET_LENGTH - 5) / 2) { | |
261 | len = (MAX_PACKET_LENGTH - 5) / 2; | |
262 | } | |
263 | ||
264 | if (len < auxv_len - offset) { | |
265 | g_string_assign(gdbserver_state.str_buf, "m"); | |
266 | } else { | |
267 | g_string_assign(gdbserver_state.str_buf, "l"); | |
268 | len = auxv_len - offset; | |
269 | } | |
270 | ||
271 | g_byte_array_set_size(gdbserver_state.mem_buf, len); | |
272 | if (target_memory_rw_debug(gdbserver_state.g_cpu, saved_auxv + offset, | |
273 | gdbserver_state.mem_buf->data, len, false)) { | |
274 | gdb_put_packet("E14"); | |
275 | return; | |
276 | } | |
277 | ||
278 | gdb_memtox(gdbserver_state.str_buf, | |
279 | (const char *)gdbserver_state.mem_buf->data, len); | |
280 | gdb_put_packet_binary(gdbserver_state.str_buf->str, | |
281 | gdbserver_state.str_buf->len, true); | |
282 | } | |
283 | #endif |