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