aboutsummaryrefslogtreecommitdiff
path: root/sim/rx/trace.c
blob: a4ea680bff83fb8e6635c284797d62470e68d971 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
/* trace.c --- tracing output for the RX simulator.

Copyright (C) 2005-2019 Free Software Foundation, Inc.
Contributed by Red Hat, Inc.

This file is part of the GNU simulators.

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.  */


#include "config.h"
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <ctype.h>

#include "bfd.h"
#include "dis-asm.h"

#include "cpu.h"
#include "mem.h"
#include "load.h"

static int
sim_dis_read (bfd_vma memaddr, bfd_byte * ptr, unsigned int length,
	      struct disassemble_info *info)
{
  int i;

  if (rx_big_endian)
    {
      /* See load.c for an explanation of this.  */
      for (i=0; i<length; i++)
	ptr[i] = mem_get_qi ((memaddr + i) ^ 3);
    }
  else
    mem_get_blk (memaddr, ptr, length);
  return 0;
}

/* Filter out (in place) symbols that are useless for disassembly.
   COUNT is the number of elements in SYMBOLS.
   Return the number of useful symbols. */

static long
remove_useless_symbols (asymbol ** symbols, long count)
{
  register asymbol **in_ptr = symbols, **out_ptr = symbols;

  while (--count >= 0)
    {
      asymbol *sym = *in_ptr++;

      if (strstr (sym->name, "gcc2_compiled"))
	continue;
      if (sym->name == NULL || sym->name[0] == '\0')
	continue;
      if (sym->flags & (BSF_DEBUGGING))
	continue;
      if (bfd_is_und_section (sym->section)
	  || bfd_is_com_section (sym->section))
	continue;

      *out_ptr++ = sym;
    }
  return out_ptr - symbols;
}

static int
compare_symbols (const PTR ap, const PTR bp)
{
  const asymbol *a = *(const asymbol **) ap;
  const asymbol *b = *(const asymbol **) bp;

  if (bfd_asymbol_value (a) > bfd_asymbol_value (b))
    return 1;
  else if (bfd_asymbol_value (a) < bfd_asymbol_value (b))
    return -1;
  return 0;
}

static char opbuf[1000];

static int
op_printf (char *buf, char *fmt, ...)
{
  int ret;
  va_list ap;

  va_start (ap, fmt);
  ret = vsprintf (opbuf + strlen (opbuf), fmt, ap);
  va_end (ap);
  return ret;
}

static bfd *       current_bfd = NULL;
static asymbol **  symtab = NULL;
static int         symcount = 0;
static asection *  code_section = NULL;
static bfd_vma     code_base = 0;
static struct disassemble_info info;

void
sim_disasm_init (bfd *prog)
{
  current_bfd = prog;
}

typedef struct Files
{
  struct Files *next;
  char *filename;
  int nlines;
  char **lines;
  char *data;
} Files;
Files *files = 0;

static char *
load_file_and_line (const char *filename, int lineno)
{
  Files *f;
  for (f = files; f; f = f->next)
    if (strcmp (f->filename, filename) == 0)
      break;
  if (!f)
    {
      int i;
      struct stat s;
      const char *found_filename, *slash;

      found_filename = filename;
      while (1)
	{
	  if (stat (found_filename, &s) == 0)
	    break;
	  slash = strchr (found_filename, '/');
	  if (!slash)
	    return "";
	  found_filename = slash + 1;
	}

      f = (Files *) malloc (sizeof (Files));
      f->next = files;
      files = f;
      f->filename = strdup (filename);
      f->data = (char *) malloc (s.st_size + 2);
      FILE *file = fopen (found_filename, "rb");
      fread (f->data, 1, s.st_size, file);
      f->data[s.st_size] = 0;
      fclose (file);

      f->nlines = 1;
      for (i = 0; i < s.st_size; i++)
	if (f->data[i] == '\n')
	  f->nlines++;
      f->lines = (char **) malloc (f->nlines * sizeof (char *));
      f->lines[0] = f->data;
      f->nlines = 1;
      for (i = 0; i < s.st_size; i++)
	if (f->data[i] == '\n')
	  {
	    f->lines[f->nlines] = f->data + i + 1;
	    while (*f->lines[f->nlines] == ' '
		   || *f->lines[f->nlines] == '\t')
	      f->lines[f->nlines]++;
	    f->nlines++;
	    f->data[i] = 0;
	  }
    }
  if (lineno < 1 || lineno > f->nlines)
    return "";
  return f->lines[lineno - 1];
}

int
sim_get_current_source_location (const char **  pfilename,
				 const char **  pfunctionname,
				 unsigned int * plineno)
{
  static int   initted = 0;
  int          mypc = get_reg (pc);

  if (current_bfd == NULL)
    return 0;

  if (!initted)
    {
      int storage;
      asection * s;

      initted = 1;
      memset (& info, 0, sizeof (info));
      INIT_DISASSEMBLE_INFO (info, stdout, op_printf);
      info.read_memory_func = sim_dis_read;
      info.arch = bfd_get_arch (current_bfd);
      info.mach = bfd_get_mach (current_bfd);
      if (info.mach == 0)
	info.arch = bfd_arch_rx;

      disassemble_init_for_target (& info);

      storage = bfd_get_symtab_upper_bound (current_bfd);
      if (storage > 0)
	{
	  symtab = (asymbol **) malloc (storage);
	  symcount = bfd_canonicalize_symtab (current_bfd, symtab);
	  symcount = remove_useless_symbols (symtab, symcount);
	  qsort (symtab, symcount, sizeof (asymbol *), compare_symbols);
	}

      for (s = current_bfd->sections; s; s = s->next)
	{
	  if (s->flags & SEC_CODE || code_section == 0)
	    {
	      code_section = s;
	      code_base = bfd_section_lma (s);
	      break;
	    }
	}
    }

  *pfilename = *pfunctionname = NULL;
  *plineno = 0;

  bfd_find_nearest_line
    (current_bfd, code_section, symtab, mypc - code_base,
     pfilename, pfunctionname, plineno);

  return 1;
}

void
sim_disasm_one (void)
{
  static int           last_sym = -1;
  static const char *  prev_filename = "";
  static int           prev_lineno = 0;
  const char *  filename;
  const char *  functionname;
  unsigned int  lineno;
  int           sym, bestaddr;
  int           min, max, i;
  int           save_trace = trace;
  int           mypc = get_reg (pc);

  if (! sim_get_current_source_location (& filename, & functionname, & lineno))
    return;

  trace = 0;

  if (filename && functionname && lineno)
    {
      if (lineno != prev_lineno || strcmp (prev_filename, filename))
	{
	  char *       the_line = load_file_and_line (filename, lineno);
	  const char * slash = strrchr (filename, '/');

	  if (!slash)
	    slash = filename;
	  else
	    slash++;
	  printf
	    ("========================================"
	     "=====================================\n");
	  printf ("\033[37;41m %s:%d: \033[33;40m %s\033[K\033[0m\n",
		  slash, lineno, the_line);
	}
      prev_lineno = lineno;
      prev_filename = filename;
    }

  min = -1;
  max = symcount;
  while (min < max - 1)
    {
      bfd_vma sa;

      sym = (min + max) / 2;
      sa = bfd_asymbol_value (symtab[sym]);
      /*printf("checking %4d %08x %s\n",
	sym, sa, bfd_asymbol_name (symtab[sym])); */
      if (sa > mypc)
	max = sym;
      else if (sa < mypc)
	min = sym;
      else
	{
	  min = sym;
	  break;
	}
    }

  if (min != -1 && min != last_sym)
    {
      bestaddr = bfd_asymbol_value (symtab[min]);
      printf ("\033[43;30m%s", bfd_asymbol_name (symtab[min]));
      if (bestaddr != mypc)
	printf ("+%d", mypc - bestaddr);
      printf (":\t\t\t\033[0m\n");
      last_sym = min;
#if 0
      if (trace == 1)
	if (strcmp (bfd_asymbol_name (symtab[min]), "abort") == 0
	    || strcmp (bfd_asymbol_name (symtab[min]), "exit") == 0)
	  trace = 0;
#endif
    }

  opbuf[0] = 0;
#ifdef CYCLE_ACCURATE
  printf ("\033[33m %04u %06x: ", (int)(regs.cycle_count % 10000), mypc);
#else
  printf ("\033[33m %06x: ", mypc);

#endif

  max = print_insn_rx (mypc, & info);

  for (i = 0; i < max; i++)
    {
      if (rx_big_endian)
	printf ("%02x", mem_get_qi ((mypc + i) ^ 3));
      else
	printf ("%02x", mem_get_qi (mypc + i));
    }

  do
    {
      printf ("  ");
      i ++;
    }
  while (i < 6);

  printf ("%-16s  ", opbuf);

  printf ("\033[0m\n");
  trace = save_trace;
}