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JB
1/* trace.c --- tracing output for the M32C simulator.
2
6aba47ca 3Copyright (C) 2005, 2007 Free Software Foundation, Inc.
d45a4bef
JB
4Contributed by Red Hat, Inc.
5
6This file is part of the GNU simulators.
7
8The GNU simulators are free software; you can redistribute them and/or
9modify them under the terms of the GNU General Public License as
10published by the Free Software Foundation; either version 2 of the
11License, or (at your option) any later version.
12
13The GNU simulators are distributed in the hope that they will be
14useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
15MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16General Public License for more details.
17
18You should have received a copy of the GNU General Public License
19along with the GNU simulators; if not, write to the Free Software
20Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
2102110-1301, USA */
22
23
24#include <stdio.h>
25#include <stdarg.h>
26#include <string.h>
27#include <stdlib.h>
28#include <sys/types.h>
29#include <sys/stat.h>
30#include <ctype.h>
31
32#include "bfd.h"
33#include "dis-asm.h"
34#include "m32c-desc.h"
35
36#include "cpu.h"
37#include "mem.h"
38#include "load.h"
39
40static int
41sim_dis_read (bfd_vma memaddr, bfd_byte * ptr, unsigned int length,
42 struct disassemble_info *info)
43{
44 mem_get_blk (memaddr, ptr, length);
45 return 0;
46}
47
48/* Filter out (in place) symbols that are useless for disassembly.
49 COUNT is the number of elements in SYMBOLS.
50 Return the number of useful symbols. */
51
52static long
53remove_useless_symbols (asymbol ** symbols, long count)
54{
55 register asymbol **in_ptr = symbols, **out_ptr = symbols;
56
57 while (--count >= 0)
58 {
59 asymbol *sym = *in_ptr++;
60
61 if (strstr (sym->name, "gcc2_compiled"))
62 continue;
63 if (sym->name == NULL || sym->name[0] == '\0')
64 continue;
65 if (sym->flags & (BSF_DEBUGGING))
66 continue;
67 if (bfd_is_und_section (sym->section)
68 || bfd_is_com_section (sym->section))
69 continue;
70
71 *out_ptr++ = sym;
72 }
73 return out_ptr - symbols;
74}
75
76static int
77compare_symbols (const PTR ap, const PTR bp)
78{
79 const asymbol *a = *(const asymbol **) ap;
80 const asymbol *b = *(const asymbol **) bp;
81
82 if (bfd_asymbol_value (a) > bfd_asymbol_value (b))
83 return 1;
84 else if (bfd_asymbol_value (a) < bfd_asymbol_value (b))
85 return -1;
86 return 0;
87}
88
89static char opbuf[1000];
90
91static int
92op_printf (char *buf, char *fmt, ...)
93{
94 int ret;
95 va_list ap;
96
97 va_start (ap, fmt);
98 ret = vsprintf (opbuf + strlen (opbuf), fmt, ap);
99 va_end (ap);
100 return ret;
101}
102
103static bfd *current_bfd;
104
105void
106sim_disasm_init (bfd *prog)
107{
108 current_bfd = prog;
109}
110
111typedef struct Files
112{
113 struct Files *next;
114 char *filename;
115 int nlines;
116 char **lines;
117 char *data;
118} Files;
119Files *files = 0;
120
121static char *
122load_file_and_line (const char *filename, int lineno)
123{
124 Files *f;
125 for (f = files; f; f = f->next)
126 if (strcmp (f->filename, filename) == 0)
127 break;
128 if (!f)
129 {
130 int i;
131 struct stat s;
132 const char *found_filename, *slash;
133
134 found_filename = filename;
135 while (1)
136 {
137 if (stat (found_filename, &s) == 0)
138 break;
139 slash = strchr (found_filename, '/');
140 if (!slash)
141 return "";
142 found_filename = slash + 1;
143 }
144
145 f = (Files *) malloc (sizeof (Files));
146 f->next = files;
147 files = f;
148 f->filename = strdup (filename);
149 f->data = (char *) malloc (s.st_size + 2);
150 FILE *file = fopen (found_filename, "rb");
151 fread (f->data, 1, s.st_size, file);
152 f->data[s.st_size] = 0;
153 fclose (file);
154
155 f->nlines = 1;
156 for (i = 0; i < s.st_size; i++)
157 if (f->data[i] == '\n')
158 f->nlines++;
159 f->lines = (char **) malloc (f->nlines * sizeof (char *));
160 f->lines[0] = f->data;
161 f->nlines = 1;
162 for (i = 0; i < s.st_size; i++)
163 if (f->data[i] == '\n')
164 {
165 f->lines[f->nlines] = f->data + i + 1;
166 while (*f->lines[f->nlines] == ' '
167 || *f->lines[f->nlines] == '\t')
168 f->lines[f->nlines]++;
169 f->nlines++;
170 f->data[i] = 0;
171 }
172 }
173 if (lineno < 1 || lineno > f->nlines)
174 return "";
175 return f->lines[lineno - 1];
176}
177
178void
179sim_disasm_one ()
180{
181 static int initted = 0;
182 static asymbol **symtab = 0;
183 static int symcount = 0;
184 static int last_sym = -1;
185 static struct disassemble_info info;
186 int storage, sym, bestaddr;
187 int min, max, i;
188 static asection *code_section = 0;
189 static bfd_vma code_base = 0;
190 asection *s;
191 int save_trace = trace;
192
193 static const char *prev_filename = "";
194 static int prev_lineno = 0;
195 const char *filename;
196 const char *functionname;
197 unsigned int lineno;
198
199 int mypc = get_reg (pc);
200
201 if (current_bfd == 0)
202 return;
203
204 trace = 0;
205
206 if (!initted)
207 {
208 initted = 1;
209 memset (&info, 0, sizeof (info));
210 INIT_DISASSEMBLE_INFO (info, stdout, op_printf);
211 info.read_memory_func = sim_dis_read;
212 info.arch = bfd_get_arch (current_bfd);
213 info.mach = bfd_get_mach (current_bfd);
214 if (info.mach == 0)
215 {
216 info.arch = bfd_arch_m32c;
217 info.mach = default_machine;
218 }
219 disassemble_init_for_target (&info);
220
221 storage = bfd_get_symtab_upper_bound (current_bfd);
222 if (storage > 0)
223 {
224 symtab = (asymbol **) malloc (storage);
225 symcount = bfd_canonicalize_symtab (current_bfd, symtab);
226 symcount = remove_useless_symbols (symtab, symcount);
227 qsort (symtab, symcount, sizeof (asymbol *), compare_symbols);
228 }
229 for (s = current_bfd->sections; s; s = s->next)
230 {
231 if (s->flags & SEC_CODE || code_section == 0)
232 {
233 code_section = s;
234 code_base = bfd_section_lma (current_bfd, s);
235 break;
236 }
237 }
238 }
239
240 filename = functionname = 0;
241 lineno = 0;
242 if (bfd_find_nearest_line
243 (current_bfd, code_section, symtab, mypc - code_base, &filename,
244 &functionname, &lineno))
245 {
246 if (filename && functionname && lineno)
247 {
248 if (lineno != prev_lineno || strcmp (prev_filename, filename))
249 {
250 char *the_line = load_file_and_line (filename, lineno);
251 const char *slash = strrchr (filename, '/');
252 if (!slash)
253 slash = filename;
254 else
255 slash++;
256 printf
257 ("========================================"
258 "=====================================\n");
259 printf ("\033[37;41m %s:%d: \033[33;40m %s\033[K\033[0m\n",
260 slash, lineno, the_line);
261 }
262 prev_lineno = lineno;
263 prev_filename = filename;
264 }
265 }
266
267 {
268 min = -1;
269 max = symcount;
270 while (min < max - 1)
271 {
272 bfd_vma sa;
273 sym = (min + max) / 2;
274 sa = bfd_asymbol_value (symtab[sym]);
275 /*printf("checking %4d %08x %s\n",
276 sym, sa, bfd_asymbol_name (symtab[sym])); */
277 if (sa > mypc)
278 max = sym;
279 else if (sa < mypc)
280 min = sym;
281 else
282 {
283 min = sym;
284 break;
285 }
286 }
287 if (min != -1 && min != last_sym)
288 {
289 bestaddr = bfd_asymbol_value (symtab[min]);
290 printf ("\033[43;30m%s", bfd_asymbol_name (symtab[min]));
291 if (bestaddr != mypc)
292 printf ("+%d", mypc - bestaddr);
293 printf (":\t\t\t\033[0m\n");
294 last_sym = min;
295#if 0
296 if (trace == 1)
297 if (strcmp (bfd_asymbol_name (symtab[min]), "abort") == 0
298 || strcmp (bfd_asymbol_name (symtab[min]), "exit") == 0)
299 trace = 0;
300#endif
301 }
302 }
303
304 opbuf[0] = 0;
305 printf ("\033[33m%06x: ", mypc);
306 max = print_insn_m32c (mypc, &info);
307 for (i = 0; i < max; i++)
308 printf ("%02x", mem_get_qi (mypc + i));
309 for (; i < 6; i++)
310 printf (" ");
311 printf ("%-16s ", opbuf);
312
313 printf ("\033[0m\n");
314 trace = save_trace;
315}