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1 | /* |
5686d931 |
2 | * PDB, the PicoDrive debugger |
cff531af |
3 | * (C) notaz, 2010 |
4 | * |
5 | * This work is licensed under the terms of MAME license. |
6 | * See COPYING file in the top-level directory. |
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7 | */ |
8 | #define _GNU_SOURCE |
9 | #include <stdio.h> |
10 | |
11 | #include "../pico/pico_int.h" |
12 | #include "debug.h" |
13 | |
14 | static char pdb_pending_cmds[128]; |
15 | static char pdb_event_cmds[128]; |
16 | |
17 | static struct pdb_cpu { |
18 | void *context; |
19 | int type; |
20 | int id; |
21 | const char *name; |
22 | unsigned int bpts[16]; |
23 | int bpt_count; |
24 | int icount; |
25 | } pdb_cpus[5]; |
26 | static int pdb_cpu_count; |
27 | |
28 | static int pdb_global_icount; |
29 | |
30 | #ifdef PDB_NET |
31 | #include <stddef.h> |
32 | #include <sys/types.h> |
33 | #include <sys/socket.h> |
34 | #include <netinet/in.h> |
35 | #include <arpa/inet.h> |
36 | #include <unistd.h> |
37 | |
38 | #include "debug_net.h" |
39 | |
40 | static int pdb_net_sock = -1; |
41 | |
42 | int pdb_net_connect(const char *host, const char *port) |
43 | { |
44 | struct sockaddr_in sockadr; |
45 | int sock = -1; |
46 | int ret; |
47 | |
48 | sock = socket(PF_INET, SOCK_STREAM, 0); |
49 | if (sock == -1) { |
50 | perror("socket"); |
51 | return -1; |
52 | } |
53 | |
54 | sockadr.sin_addr.s_addr = inet_addr(host); |
55 | sockadr.sin_family = AF_INET; |
56 | sockadr.sin_port = htons(atoi(port)); |
57 | |
58 | ret = connect(sock, (struct sockaddr *)&sockadr, sizeof(sockadr)); |
59 | if (ret != 0) { |
60 | perror("pdb_net: connect"); |
61 | close(sock); |
62 | return -1; |
63 | } |
64 | |
65 | printf("pdb_net: connected to %s:%s\n", host, port); |
66 | |
67 | pdb_net_sock = sock; |
68 | return 0; |
69 | } |
70 | |
71 | static int pdb_net_send(struct pdb_cpu *cpu, unsigned int pc) |
72 | { |
73 | packet_t packet; |
74 | int ret; |
75 | |
76 | if (pdb_net_sock < 0) |
77 | return 0; // not connected |
78 | |
79 | if (cpu->type == PDBCT_SH2) { |
80 | SH2 *sh2 = cpu->context; |
81 | int rl = offsetof(SH2, macl) + sizeof(sh2->macl); |
82 | packet.header.type = PDBCT_SH2; |
83 | packet.header.cpuid = cpu->id; |
84 | packet.regs[0] = pc; |
85 | memcpy(&packet.regs[1], sh2->r, rl); |
86 | packet.regs[1+24+0] = sh2->pdb_io_csum[0]; |
87 | packet.regs[1+24+1] = sh2->pdb_io_csum[1]; |
88 | packet.header.len = 4 + rl + 4*2; |
89 | sh2->pdb_io_csum[0] = sh2->pdb_io_csum[1] = 0; |
90 | } |
30f0fdd4 |
91 | else |
92 | memset(&packet, 0, sizeof(packet)); |
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93 | |
94 | ret = send(pdb_net_sock, &packet, sizeof(packet.header) + packet.header.len, MSG_NOSIGNAL); |
95 | if (ret != sizeof(packet.header) + packet.header.len) { |
96 | if (ret < 0) |
97 | perror("send"); |
98 | else |
99 | printf("send: %d/%d\n", ret, sizeof(packet.header) + packet.header.len); |
100 | close(pdb_net_sock); |
101 | pdb_net_sock = -1; |
102 | ret = -1; |
103 | } |
104 | return ret; |
105 | } |
106 | #else |
107 | #define pdb_net_send(a,b) 0 |
108 | #endif // PDB_NET |
109 | |
110 | #ifdef HAVE_READLINE |
111 | #include <readline/readline.h> |
112 | #include <readline/history.h> |
113 | #endif |
114 | |
115 | static char *my_readline(const char *prompt) |
116 | { |
117 | char *line = NULL; |
118 | |
119 | #ifdef HAVE_READLINE |
120 | line = readline("(pdb) "); |
121 | if (line == NULL) |
122 | return NULL; |
123 | if (line[0] != 0) |
124 | add_history(line); |
125 | #else |
126 | size_t size = 0; |
127 | ssize_t ret; |
128 | |
129 | printf("(pdb) "); |
130 | fflush(stdout); |
131 | ret = getline(&line, &size, stdin); |
132 | if (ret < 0) |
133 | return NULL; |
134 | if (ret > 0 && line[ret - 1] == '\n') |
135 | line[ret - 1] = 0; |
136 | #endif |
137 | |
138 | return line; |
139 | } |
140 | |
141 | static struct pdb_cpu *context2cpu(const void *context) |
142 | { |
143 | int i; |
144 | for (i = 0; i < pdb_cpu_count; i++) |
145 | if (pdb_cpus[i].context == context) |
146 | return &pdb_cpus[i]; |
147 | return NULL; |
148 | } |
149 | |
150 | static const char *get_token(char *buf, int blen, const char *str) |
151 | { |
152 | const char *p, *s, *e; |
153 | int len; |
154 | |
155 | p = str; |
156 | while (isspace_(*p)) |
157 | p++; |
158 | if (*p == 0) |
159 | return NULL; |
160 | if (*p == ';') { |
161 | strcpy(buf, ";"); |
162 | return p + 1; |
163 | } |
164 | |
165 | s = p; |
166 | while (*p != 0 && *p != ';' && !isspace_(*p)) |
167 | p++; |
168 | e = p; |
169 | while (isspace_(*e)) |
170 | e++; |
171 | |
172 | len = p - s; |
173 | if (len > blen - 1) |
174 | len = blen - 1; |
175 | memcpy(buf, s, len); |
176 | buf[len] = 0; |
177 | return e; |
178 | } |
179 | |
180 | static const char *get_arg(char *buf, int blen, const char *str) |
181 | { |
182 | if (*str == ';') |
183 | return NULL; |
184 | return get_token(buf, blen, str); |
185 | } |
186 | |
187 | enum cmd_ret_e { |
188 | CMDRET_DONE, // ..and back to prompt |
189 | // CMDRET_PROMPT, // go to prompt |
190 | CMDRET_CONT_DO_NEXT, // continue and do remaining cmds on next event |
191 | CMDRET_CONT_REDO, // continue and redo all cmds on next event |
192 | }; |
193 | |
194 | static int do_print(struct pdb_cpu *cpu, const char *args) |
195 | { |
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196 | elprintf(EL_STATUS, "cpu %d (%s)", cpu->id, cpu->name); |
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197 | #ifndef NO_32X |
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198 | if (cpu->type == PDBCT_SH2) { |
199 | SH2 *sh2 = cpu->context; |
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200 | int i; |
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201 | printf("PC,SR %08x, %03x\n", sh2->pc, sh2->sr & 0x3ff); |
202 | for (i = 0; i < 16/2; i++) |
203 | printf("R%d,%2d %08x,%08x\n", i, i + 8, sh2->r[i], sh2->r[i + 8]); |
204 | printf("gb,vb %08x,%08x\n", sh2->gbr, sh2->vbr); |
205 | printf("IRQs/mask: %02x/%02x\n", Pico32x.sh2irqi[sh2->is_slave], |
206 | Pico32x.sh2irq_mask[sh2->is_slave]); |
207 | printf("cycles %d/%d (%d)\n", sh2->cycles_done, sh2->cycles_aim, (signed int)sh2->sr >> 12); |
208 | } |
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209 | #endif |
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210 | return CMDRET_DONE; |
211 | } |
212 | |
213 | static int do_step_all(struct pdb_cpu *cpu, const char *args) |
214 | { |
215 | char tmp[32]; |
216 | if (!get_arg(tmp, sizeof(tmp), args)) { |
217 | printf("step_all: missing arg\n"); |
218 | return CMDRET_DONE; |
219 | } |
220 | |
221 | pdb_global_icount = atoi(tmp); |
222 | return CMDRET_CONT_DO_NEXT; |
223 | } |
224 | |
225 | static int do_continue(struct pdb_cpu *cpu, const char *args) |
226 | { |
227 | char tmp[32]; |
228 | if (get_arg(tmp, sizeof(tmp), args)) |
229 | cpu->icount = atoi(tmp); |
230 | return CMDRET_CONT_DO_NEXT; |
231 | } |
232 | |
233 | static int do_step(struct pdb_cpu *cpu, const char *args) |
234 | { |
235 | cpu->icount = 1; |
236 | return do_continue(cpu, args); |
237 | } |
238 | |
239 | static int do_waitcpu(struct pdb_cpu *cpu, const char *args) |
240 | { |
241 | char tmp[32]; |
242 | if (!get_arg(tmp, sizeof(tmp), args)) { |
243 | printf("waitcpu: missing arg\n"); |
244 | return CMDRET_DONE; |
245 | } |
246 | if (strcmp(tmp, cpu->name) == 0) |
247 | return CMDRET_DONE; |
248 | |
249 | return CMDRET_CONT_REDO; |
250 | } |
251 | |
252 | static int do_help(struct pdb_cpu *cpu, const char *args); |
253 | |
254 | static struct { |
255 | const char *cmd; |
256 | const char *help; |
257 | int (*handler)(struct pdb_cpu *cpu, const char *args); |
258 | } pdb_cmds[] = { |
259 | { "help", "", do_help }, |
260 | { "continue", "[insns]", do_continue }, |
261 | { "step", "[insns]", do_step }, |
262 | { "step_all", "<insns>", do_step_all }, |
263 | { "waitcpu", "<cpuname>", do_waitcpu }, |
264 | { "print", "", do_print }, |
265 | }; |
266 | |
267 | static int do_help(struct pdb_cpu *cpu, const char *args) |
268 | { |
269 | int i; |
270 | for (i = 0; i < ARRAY_SIZE(pdb_cmds); i++) |
271 | printf("%s %s\n", pdb_cmds[i].cmd, pdb_cmds[i].help); |
272 | return CMDRET_DONE; |
273 | } |
274 | |
275 | static int do_comands(struct pdb_cpu *cpu, const char *cmds) |
276 | { |
277 | const char *p = cmds; |
278 | while (p != NULL) |
279 | { |
280 | const char *pcmd; |
281 | char cmd[32]; |
282 | int i, len; |
283 | int ret = 0; |
284 | |
285 | pcmd = p; |
286 | p = get_token(cmd, sizeof(cmd), p); |
287 | if (p == NULL) |
288 | break; |
289 | if (cmd[0] == ';') |
290 | continue; |
291 | |
292 | len = strlen(cmd); |
293 | for (i = 0; i < ARRAY_SIZE(pdb_cmds); i++) |
294 | if (strncmp(pdb_cmds[i].cmd, cmd, len) == 0) { |
295 | ret = pdb_cmds[i].handler(cpu, p); |
296 | break; |
297 | } |
298 | |
299 | if (i == ARRAY_SIZE(pdb_cmds)) { |
300 | printf("bad cmd: %s\n", cmd); |
301 | break; |
302 | } |
303 | |
304 | // skip until next command |
305 | while (1) { |
306 | p = get_token(cmd, sizeof(cmd), p); |
307 | if (p == NULL || cmd[0] == ';') |
308 | break; |
309 | } |
310 | |
311 | pdb_event_cmds[0] = 0; |
312 | if (ret == CMDRET_CONT_DO_NEXT) { |
313 | pdb_pending_cmds[0] = 0; |
314 | if (p != NULL) |
315 | strcpy(pdb_event_cmds, p); |
316 | return 0; |
317 | } |
318 | if (ret == CMDRET_CONT_REDO) { |
319 | if (pcmd != pdb_pending_cmds) |
320 | strncpy(pdb_pending_cmds, pcmd, sizeof(pdb_pending_cmds)); |
321 | return 0; |
322 | } |
323 | pdb_pending_cmds[0] = 0; |
324 | } |
325 | |
326 | return 1; |
327 | } |
328 | |
329 | static void do_prompt(struct pdb_cpu *cpu) |
330 | { |
331 | static char prev[128]; |
332 | int ret; |
333 | |
334 | while (1) { |
335 | char *line, *cline; |
336 | |
337 | line = my_readline("(pdb) "); |
338 | if (line == NULL) |
339 | break; |
340 | if (line[0] == 0) |
341 | cline = prev; |
342 | else { |
343 | cline = line; |
344 | strncpy(prev, line, sizeof(prev)); |
345 | } |
346 | |
347 | ret = do_comands(cpu, cline); |
348 | free(line); |
349 | |
350 | if (ret == 0) |
351 | break; |
352 | } |
353 | } |
354 | |
355 | void pdb_register_cpu(void *context, int type, const char *name) |
356 | { |
357 | int i = pdb_cpu_count; |
358 | memset(&pdb_cpus[i], 0, sizeof(pdb_cpus[i])); |
359 | pdb_cpus[i].context = context; |
360 | pdb_cpus[i].type = type; |
361 | pdb_cpus[i].id = pdb_cpu_count; |
362 | pdb_cpus[i].name = name; |
363 | pdb_cpus[i].icount = -1; |
364 | pdb_cpu_count++; |
365 | } |
366 | |
367 | void pdb_step(void *context, unsigned int pc) |
368 | { |
369 | struct pdb_cpu *cpu = context2cpu(context); |
370 | int i; |
371 | |
372 | if (pdb_net_send(cpu, pc) < 0) |
373 | goto prompt; |
374 | |
375 | if (pdb_pending_cmds[0] != 0) |
376 | if (do_comands(cpu, pdb_pending_cmds)) |
377 | goto prompt; |
378 | |
379 | // breakpoint? |
380 | for (i = 0; i < cpu->bpt_count; i++) |
381 | if (cpu->bpts[i] == pc) |
382 | goto prompt; |
383 | |
384 | // hit num of insns? |
385 | if (pdb_global_icount > 0) |
386 | if (--pdb_global_icount == 0) |
387 | goto prompt; |
388 | |
389 | if (cpu->icount > 0) |
390 | if (--(cpu->icount) == 0) |
391 | goto prompt; |
392 | |
393 | return; |
394 | |
395 | prompt: |
396 | if (pdb_event_cmds[0] != 0) |
397 | if (!do_comands(cpu, pdb_event_cmds)) |
398 | return; |
399 | |
400 | printf("%s @%08x\n", cpu->name, pc); |
401 | do_prompt(cpu); |
402 | } |
403 | |
404 | void pdb_command(const char *cmd) |
405 | { |
406 | strncpy(pdb_pending_cmds, cmd, sizeof(pdb_pending_cmds)); |
407 | pdb_pending_cmds[sizeof(pdb_pending_cmds) - 1] = 0; |
408 | } |
409 | |
410 | void pdb_cleanup(void) |
411 | { |
412 | pdb_cpu_count = 0; |
413 | } |
414 | |
cff531af |
415 | // vim:shiftwidth=2:expandtab |