[picodrive.git] / cpu / debug.c

/*
 * vim:shiftwidth=2:expandtab
 * PDB, the PicoDrive debugger
 */
#define _GNU_SOURCE
#include <stdio.h>

#include "../pico/pico_int.h"
#include "debug.h"

static char pdb_pending_cmds[128];
static char pdb_event_cmds[128];

static struct pdb_cpu {
  void *context;
  int type;
  int id;
  const char *name;
  unsigned int bpts[16];
  int bpt_count;
  int icount;
} pdb_cpus[5];
static int pdb_cpu_count;

static int pdb_global_icount;

#ifdef PDB_NET
#include <stddef.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>

#include "debug_net.h"

static int pdb_net_sock = -1;

int pdb_net_connect(const char *host, const char *port)
{
  struct sockaddr_in sockadr;
  int sock = -1;
  int ret;

  sock = socket(PF_INET, SOCK_STREAM, 0);
  if (sock == -1) {
    perror("socket");
    return -1;
  }

  sockadr.sin_addr.s_addr = inet_addr(host);
  sockadr.sin_family = AF_INET;
  sockadr.sin_port = htons(atoi(port));

  ret = connect(sock, (struct sockaddr *)&sockadr, sizeof(sockadr));
  if (ret != 0) {
    perror("pdb_net: connect");
    close(sock);
    return -1;
  }

  printf("pdb_net: connected to %s:%s\n", host, port);

  pdb_net_sock = sock;
  return 0;
}

static int pdb_net_send(struct pdb_cpu *cpu, unsigned int pc)
{
  packet_t packet;
  int ret;

  if (pdb_net_sock < 0)
    return 0; // not connected

  if (cpu->type == PDBCT_SH2) {
    SH2 *sh2 = cpu->context;
    int rl = offsetof(SH2, macl) + sizeof(sh2->macl);
    packet.header.type = PDBCT_SH2;
    packet.header.cpuid = cpu->id;
    packet.regs[0] = pc;
    memcpy(&packet.regs[1], sh2->r, rl);
    packet.regs[1+24+0] = sh2->pdb_io_csum[0];
    packet.regs[1+24+1] = sh2->pdb_io_csum[1];
    packet.header.len = 4 + rl + 4*2;
    sh2->pdb_io_csum[0] = sh2->pdb_io_csum[1] = 0;
  }

  ret = send(pdb_net_sock, &packet, sizeof(packet.header) + packet.header.len, MSG_NOSIGNAL);
  if (ret != sizeof(packet.header) + packet.header.len) {
    if (ret < 0)
      perror("send");
    else
      printf("send: %d/%d\n", ret, sizeof(packet.header) + packet.header.len);
    close(pdb_net_sock);
    pdb_net_sock = -1;
    ret = -1;
  }
  return ret;
}
#else
#define pdb_net_send(a,b) 0
#endif // PDB_NET

#ifdef HAVE_READLINE
#include <readline/readline.h>
#include <readline/history.h>
#endif

static char *my_readline(const char *prompt)
{
  char *line = NULL;

#ifdef HAVE_READLINE
  line = readline("(pdb) ");
  if (line == NULL)
    return NULL;
  if (line[0] != 0)
    add_history(line);
#else
  size_t size = 0;
  ssize_t ret;

  printf("(pdb) ");
  fflush(stdout);
  ret = getline(&line, &size, stdin);
  if (ret < 0)
    return NULL;
  if (ret > 0 && line[ret - 1] == '\n')
    line[ret - 1] = 0;
#endif

  return line;
}

static struct pdb_cpu *context2cpu(const void *context)
{
  int i;
  for (i = 0; i < pdb_cpu_count; i++)
    if (pdb_cpus[i].context == context)
      return &pdb_cpus[i];
  return NULL;
}

static const char *get_token(char *buf, int blen, const char *str)
{
  const char *p, *s, *e;
  int len;

  p = str;
  while (isspace_(*p))
    p++;
  if (*p == 0)
    return NULL;
  if (*p == ';') {
    strcpy(buf, ";");
    return p + 1;
  }

  s = p;
  while (*p != 0 && *p != ';' && !isspace_(*p))
    p++;
  e = p;
  while (isspace_(*e))
    e++;

  len = p - s;
  if (len > blen - 1)
    len = blen - 1;
  memcpy(buf, s, len);
  buf[len] = 0;
  return e;
}

static const char *get_arg(char *buf, int blen, const char *str)
{
  if (*str == ';')
    return NULL;
  return get_token(buf, blen, str);
}

enum cmd_ret_e {
  CMDRET_DONE,          // ..and back to prompt
//  CMDRET_PROMPT,        // go to prompt
  CMDRET_CONT_DO_NEXT,  // continue and do remaining cmds on next event
  CMDRET_CONT_REDO,     // continue and redo all cmds on next event
};

static int do_print(struct pdb_cpu *cpu, const char *args)
{
  int i;
  elprintf(EL_STATUS, "cpu %d (%s)", cpu->id, cpu->name);
  if (cpu->type == PDBCT_SH2) {
    SH2 *sh2 = cpu->context;
    printf("PC,SR %08x,     %03x\n", sh2->pc, sh2->sr & 0x3ff);
    for (i = 0; i < 16/2; i++)
      printf("R%d,%2d %08x,%08x\n", i, i + 8, sh2->r[i], sh2->r[i + 8]);
    printf("gb,vb %08x,%08x\n", sh2->gbr, sh2->vbr);
    printf("IRQs/mask:        %02x/%02x\n", Pico32x.sh2irqi[sh2->is_slave],
      Pico32x.sh2irq_mask[sh2->is_slave]);
    printf("cycles %d/%d (%d)\n", sh2->cycles_done, sh2->cycles_aim, (signed int)sh2->sr >> 12);
  }
  return CMDRET_DONE;
}

static int do_step_all(struct pdb_cpu *cpu, const char *args)
{
  char tmp[32];
  if (!get_arg(tmp, sizeof(tmp), args)) {
    printf("step_all: missing arg\n");
    return CMDRET_DONE;
  }

  pdb_global_icount = atoi(tmp);
  return CMDRET_CONT_DO_NEXT;
}

static int do_continue(struct pdb_cpu *cpu, const char *args)
{
  char tmp[32];
  if (get_arg(tmp, sizeof(tmp), args))
    cpu->icount = atoi(tmp);
  return CMDRET_CONT_DO_NEXT;
}

static int do_step(struct pdb_cpu *cpu, const char *args)
{
  cpu->icount = 1;
  return do_continue(cpu, args);
}

static int do_waitcpu(struct pdb_cpu *cpu, const char *args)
{
  char tmp[32];
  if (!get_arg(tmp, sizeof(tmp), args)) {
    printf("waitcpu: missing arg\n");
    return CMDRET_DONE;
  }
  if (strcmp(tmp, cpu->name) == 0)
    return CMDRET_DONE;

  return CMDRET_CONT_REDO;
}

static int do_help(struct pdb_cpu *cpu, const char *args);

static struct {
  const char *cmd;
  const char *help;
  int (*handler)(struct pdb_cpu *cpu, const char *args);
} pdb_cmds[] = {
  { "help",     "",          do_help },
  { "continue", "[insns]",   do_continue },
  { "step",     "[insns]",   do_step },
  { "step_all", "<insns>",   do_step_all },
  { "waitcpu",  "<cpuname>", do_waitcpu },
  { "print",    "",          do_print },
};

static int do_help(struct pdb_cpu *cpu, const char *args)
{
  int i;
  for (i = 0; i < ARRAY_SIZE(pdb_cmds); i++)
    printf("%s %s\n", pdb_cmds[i].cmd, pdb_cmds[i].help);
  return CMDRET_DONE;
}

static int do_comands(struct pdb_cpu *cpu, const char *cmds)
{
  const char *p = cmds;
  while (p != NULL)
  {
    const char *pcmd;
    char cmd[32];
    int i, len;
    int ret = 0;

    pcmd = p;
    p = get_token(cmd, sizeof(cmd), p);
    if (p == NULL)
      break;
    if (cmd[0] == ';')
      continue;

    len = strlen(cmd);
    for (i = 0; i < ARRAY_SIZE(pdb_cmds); i++)
      if (strncmp(pdb_cmds[i].cmd, cmd, len) == 0) {
        ret = pdb_cmds[i].handler(cpu, p);
        break;
      }

    if (i == ARRAY_SIZE(pdb_cmds)) {
      printf("bad cmd: %s\n", cmd);
      break;
    }

    // skip until next command
    while (1) {
      p = get_token(cmd, sizeof(cmd), p);
      if (p == NULL || cmd[0] == ';')
        break;
    }

    pdb_event_cmds[0] = 0;
    if (ret == CMDRET_CONT_DO_NEXT) {
      pdb_pending_cmds[0] = 0;
      if (p != NULL)
        strcpy(pdb_event_cmds, p);
      return 0;
    }
    if (ret == CMDRET_CONT_REDO) {
      if (pcmd != pdb_pending_cmds)
        strncpy(pdb_pending_cmds, pcmd, sizeof(pdb_pending_cmds));
      return 0;
    }
    pdb_pending_cmds[0] = 0;
  }

  return 1;
}

static void do_prompt(struct pdb_cpu *cpu)
{
  static char prev[128];
  int ret;

  while (1) {
    char *line, *cline;

    line = my_readline("(pdb) ");
    if (line == NULL)
      break;
    if (line[0] == 0)
      cline = prev;
    else {
      cline = line;
      strncpy(prev, line, sizeof(prev));
    }
      
    ret = do_comands(cpu, cline);
    free(line);

    if (ret == 0)
      break;
  }
}

void pdb_register_cpu(void *context, int type, const char *name)
{
  int i = pdb_cpu_count;
  memset(&pdb_cpus[i], 0, sizeof(pdb_cpus[i]));
  pdb_cpus[i].context = context;
  pdb_cpus[i].type = type;
  pdb_cpus[i].id = pdb_cpu_count;
  pdb_cpus[i].name = name;
  pdb_cpus[i].icount = -1;
  pdb_cpu_count++;
}

void pdb_step(void *context, unsigned int pc)
{
  struct pdb_cpu *cpu = context2cpu(context);
  int i;

  if (pdb_net_send(cpu, pc) < 0)
    goto prompt;

  if (pdb_pending_cmds[0] != 0)
    if (do_comands(cpu, pdb_pending_cmds))
      goto prompt;

  // breakpoint?
  for (i = 0; i < cpu->bpt_count; i++)
    if (cpu->bpts[i] == pc)
      goto prompt;

  // hit num of insns?
  if (pdb_global_icount > 0)
    if (--pdb_global_icount == 0)
      goto prompt;

  if (cpu->icount > 0)
    if (--(cpu->icount) == 0)
      goto prompt;

  return;

prompt:
  if (pdb_event_cmds[0] != 0)
    if (!do_comands(cpu, pdb_event_cmds))
      return;

  printf("%s @%08x\n", cpu->name, pc);
  do_prompt(cpu);
}

void pdb_command(const char *cmd)
{
  strncpy(pdb_pending_cmds, cmd, sizeof(pdb_pending_cmds));
  pdb_pending_cmds[sizeof(pdb_pending_cmds) - 1] = 0;
}

void pdb_cleanup(void)
{
  pdb_cpu_count = 0;
}
Commit	Line	Data
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