sim/rl78/trace.c

   1 /* trace.c --- tracing output for the RL78 simulator.
   2
   3    Copyright (C) 2005-2024 Free Software Foundation, Inc.
   4    Contributed by Red Hat, Inc.
   5
   6    This file is part of the GNU simulators.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 /* This must come before any other includes.  */
  23 #include "defs.h"
  24
  25 #include <stdio.h>
  26 #include <stdarg.h>
  27 #include <string.h>
  28 #include <stdlib.h>
  29 #include <sys/types.h>
  30 #include <sys/stat.h>
  31 #include <ctype.h>
  32
  33 #include "libiberty.h"
  34 #include "bfd.h"
  35 #include "dis-asm.h"
  36
  37 #include "cpu.h"
  38 #include "mem.h"
  39 #include "load.h"
  40 #include "trace.h"
  41
  42 static disassembler_ftype rl78_disasm_fn = NULL;
  43
  44 static int
  45 sim_dis_read (bfd_vma memaddr, bfd_byte * ptr, unsigned int length,
  46               struct disassemble_info *info)
  47 {
  48   mem_get_blk (memaddr, ptr, length);
  49   return 0;
  50 }
  51
  52 /* Filter out (in place) symbols that are useless for disassembly.
  53    COUNT is the number of elements in SYMBOLS.
  54    Return the number of useful symbols. */
  55
  56 static long
  57 remove_useless_symbols (asymbol ** symbols, long count)
  58 {
  59   register asymbol **in_ptr = symbols, **out_ptr = symbols;
  60
  61   while (-- count >= 0)
  62     {
  63       asymbol *sym = *in_ptr ++;
  64
  65       if (strstr (sym->name, "gcc2_compiled"))
  66         continue;
  67       if (sym->name == NULL || sym->name[0] == '\0')
  68         continue;
  69       if (sym->flags & (BSF_DEBUGGING))
  70         continue;
  71       if (bfd_is_und_section (sym->section)
  72           || bfd_is_com_section (sym->section))
  73         continue;
  74
  75       *out_ptr++ = sym;
  76     }
  77   return out_ptr - symbols;
  78 }
  79
  80 static int
  81 compare_symbols (const void *ap, const void *bp)
  82 {
  83   const asymbol *a = *(const asymbol **) ap;
  84   const asymbol *b = *(const asymbol **) bp;
  85
  86   if (bfd_asymbol_value (a) > bfd_asymbol_value (b))
  87     return 1;
  88   else if (bfd_asymbol_value (a) < bfd_asymbol_value (b))
  89     return -1;
  90   return 0;
  91 }
  92
  93 static char opbuf[1000];
  94
  95 static int ATTRIBUTE_PRINTF (2, 3)
  96 op_printf (char *buf, char *fmt, ...)
  97 {
  98   int ret;
  99   va_list ap;
 100
 101   va_start (ap, fmt);
 102   ret = vsprintf (opbuf + strlen (opbuf), fmt, ap);
 103   va_end (ap);
 104   return ret;
 105 }
 106
 107 static int ATTRIBUTE_PRINTF (3, 4)
 108 op_styled_printf (char *buf, enum disassembler_style style, char *fmt, ...)
 109 {
 110   int ret;
 111   va_list ap;
 112
 113   va_start (ap, fmt);
 114   ret = vsprintf (opbuf + strlen (opbuf), fmt, ap);
 115   va_end (ap);
 116   return ret;
 117 }
 118
 119 static bfd *       current_bfd = NULL;
 120 static asymbol **  symtab = NULL;
 121 static int         symcount = 0;
 122 static asection *  code_section = NULL;
 123 static bfd_vma     code_base = 0;
 124 static struct disassemble_info info;
 125
 126 void
 127 sim_disasm_init (bfd *prog)
 128 {
 129   current_bfd = prog;
 130   rl78_disasm_fn = NULL;
 131 }
 132
 133 typedef struct Files
 134 {
 135   struct Files *next;
 136   char *filename;
 137   int nlines;
 138   char **lines;
 139   char *data;
 140 } Files;
 141 Files *files = 0;
 142
 143 static char *
 144 load_file_and_line (const char *filename, int lineno)
 145 {
 146   Files *f;
 147   for (f = files; f; f = f->next)
 148     if (strcmp (f->filename, filename) == 0)
 149       break;
 150   if (!f)
 151     {
 152       int i;
 153       struct stat s;
 154       const char *found_filename, *slash;
 155       FILE *file;
 156       size_t ret;
 157
 158       found_filename = filename;
 159       while (1)
 160         {
 161           if (stat (found_filename, &s) == 0)
 162             break;
 163           slash = strchr (found_filename, '/');
 164           if (!slash)
 165             return "";
 166           found_filename = slash + 1;
 167         }
 168
 169       f = (Files *) xmalloc (sizeof (Files));
 170       f->next = files;
 171       files = f;
 172       f->filename = xstrdup (filename);
 173       f->data = (char *) xmalloc (s.st_size + 2);
 174       file = fopen (found_filename, "rb");
 175       ret = fread (f->data, 1, s.st_size, file);
 176       f->data[ret] = 0;
 177       fclose (file);
 178
 179       f->nlines = 1;
 180       for (i = 0; i < s.st_size; i ++)
 181         if (f->data[i] == '\n')
 182           f->nlines ++;
 183       f->lines = (char **) xmalloc (f->nlines * sizeof (char *));
 184       f->lines[0] = f->data;
 185       f->nlines = 1;
 186       for (i = 0; i < s.st_size; i ++)
 187         if (f->data[i] == '\n')
 188           {
 189             f->lines[f->nlines] = f->data + i + 1;
 190             while (*f->lines[f->nlines] == ' '
 191                    || *f->lines[f->nlines] == '\t')
 192               f->lines[f->nlines] ++;
 193             f->nlines ++;
 194             f->data[i] = 0;
 195           }
 196     }
 197   if (lineno < 1 || lineno > f->nlines)
 198     return "";
 199   return f->lines[lineno - 1];
 200 }
 201
 202 int
 203 sim_get_current_source_location (const char **  pfilename,
 204                                  const char **  pfunctionname,
 205                                  unsigned int * plineno)
 206 {
 207   static int   initted = 0;
 208   int          mypc = pc;
 209
 210   if (current_bfd == NULL)
 211     return 0;
 212
 213   if (!initted)
 214     {
 215       int storage;
 216       asection * s;
 217
 218       initted = 1;
 219       memset (& info, 0, sizeof (info));
 220       INIT_DISASSEMBLE_INFO (info, stdout, op_printf, op_styled_printf);
 221       info.read_memory_func = sim_dis_read;
 222       info.arch = bfd_get_arch (current_bfd);
 223       info.mach = bfd_get_mach (current_bfd);
 224       if (info.mach == 0)
 225         info.arch = bfd_arch_rl78;
 226
 227       disassemble_init_for_target (& info);
 228
 229       storage = bfd_get_symtab_upper_bound (current_bfd);
 230       if (storage > 0)
 231         {
 232           symtab = (asymbol **) xmalloc (storage);
 233           symcount = bfd_canonicalize_symtab (current_bfd, symtab);
 234           symcount = remove_useless_symbols (symtab, symcount);
 235           qsort (symtab, symcount, sizeof (asymbol *), compare_symbols);
 236         }
 237
 238       for (s = current_bfd->sections; s; s = s->next)
 239         {
 240           if (s->flags & SEC_CODE || code_section == 0)
 241             {
 242               code_section = s;
 243               code_base = bfd_section_lma (s);
 244               break;
 245             }
 246         }
 247     }
 248
 249   *pfilename = *pfunctionname = NULL;
 250   *plineno = 0;
 251
 252   bfd_find_nearest_line
 253     (current_bfd, code_section, symtab, mypc - code_base,
 254      pfilename, pfunctionname, plineno);
 255
 256   return 1;
 257 }
 258
 259 void
 260 sim_disasm_one (void)
 261 {
 262   static int           last_sym = -1;
 263   static const char *  prev_filename = "";
 264   static int           prev_lineno = 0;
 265   const char *  filename;
 266   const char *  functionname;
 267   unsigned int  lineno;
 268   int           sym, bestaddr;
 269   int           min, max, i;
 270   int           save_trace = trace;
 271   int           mypc = pc;
 272
 273   if (! sim_get_current_source_location (& filename, & functionname, & lineno))
 274     return;
 275
 276   trace = 0;
 277
 278   if (!rl78_disasm_fn)
 279     {
 280       if (rl78_g10_mode)
 281         rl78_disasm_fn = print_insn_rl78_g10;
 282       else if (g14_multiply)
 283         rl78_disasm_fn = print_insn_rl78_g14;
 284       else if (g13_multiply)
 285         rl78_disasm_fn = print_insn_rl78_g13;
 286       else
 287         rl78_disasm_fn = print_insn_rl78;
 288     }
 289
 290   if (filename && functionname && lineno)
 291     {
 292       if (lineno != prev_lineno || strcmp (prev_filename, filename))
 293         {
 294           char *       the_line = load_file_and_line (filename, lineno);
 295           const char * slash = strrchr (filename, '/');
 296
 297           if (!slash)
 298             slash = filename;
 299           else
 300             slash ++;
 301           printf
 302             ("========================================"
 303              "=====================================\n");
 304           printf ("\033[37;41m %s:%d: \033[33;40m %s\033[K\033[0m\n",
 305                   slash, lineno, the_line);
 306         }
 307       prev_lineno = lineno;
 308       prev_filename = filename;
 309     }
 310
 311   min = -1;
 312   max = symcount;
 313   while (min < max - 1)
 314     {
 315       bfd_vma sa;
 316
 317       sym = (min + max) / 2;
 318       sa = bfd_asymbol_value (symtab[sym]);
 319       /*printf ("checking %4d %08x %s\n",
 320         sym, sa, bfd_asymbol_name (symtab[sym])); */
 321       if (sa > mypc)
 322         max = sym;
 323       else if (sa < mypc)
 324         min = sym;
 325       else
 326         {
 327           min = sym;
 328           break;
 329         }
 330     }
 331
 332   if (min != -1 && min != last_sym)
 333     {
 334       bestaddr = bfd_asymbol_value (symtab[min]);
 335       printf ("\033[43;30m%s", bfd_asymbol_name (symtab[min]));
 336       if (bestaddr != mypc)
 337         printf ("+%d", mypc - bestaddr);
 338       printf (":\t\t\t\033[0m\n");
 339       last_sym = min;
 340 #if 0
 341       if (trace == 1)
 342         if (strcmp (bfd_asymbol_name (symtab[min]), "abort") == 0
 343             || strcmp (bfd_asymbol_name (symtab[min]), "exit") == 0)
 344           trace = 0;
 345 #endif
 346     }
 347
 348 #define TCR0    0xf0180
 349
 350   opbuf[0] = 0;
 351 #ifdef CYCLE_ACCURATE
 352   printf ("\033[33m %04u %06x: ", (int)(regs.cycle_count % 10000), mypc);
 353 #else
 354   printf ("\033[33m %08llx %06x: ", total_clocks, mypc);
 355 #endif
 356
 357   max = rl78_disasm_fn (mypc, & info);
 358
 359   for (i = 0; i < max; i ++)
 360     printf ("%02x", mem_get_qi (mypc + i));
 361
 362   do
 363     {
 364       printf ("  ");
 365       i ++;
 366     }
 367   while (i < 6);
 368
 369   printf ("%-16s  ", opbuf);
 370
 371   printf ("\033[0m\n");
 372   trace = save_trace;
 373 }