gdb, testsuite: Fix return value in gdb.base/foll-fork.exp
[binutils-gdb.git] / sim / m32c / trace.c
blobb7725e45712e6d15945de49c4b03bd3f95c8f969
1 /* trace.c --- tracing output for the M32C simulator.
3 Copyright (C) 2005-2024 Free Software Foundation, Inc.
4 Contributed by Red Hat, Inc.
6 This file is part of the GNU simulators.
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.
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.
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/>. */
21 /* This must come before any other includes. */
22 #include "defs.h"
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>
32 #include "bfd.h"
33 #include "dis-asm.h"
34 #include "opcodes/m32c-desc.h"
36 #include "cpu.h"
37 #include "mem.h"
38 #include "load.h"
39 #include "trace.h"
41 static int
42 sim_dis_read (bfd_vma memaddr, bfd_byte * ptr, unsigned int length,
43 struct disassemble_info *info)
45 mem_get_blk (memaddr, ptr, length);
46 return 0;
49 /* Filter out (in place) symbols that are useless for disassembly.
50 COUNT is the number of elements in SYMBOLS.
51 Return the number of useful symbols. */
53 static long
54 remove_useless_symbols (asymbol ** symbols, long count)
56 register asymbol **in_ptr = symbols, **out_ptr = symbols;
58 while (--count >= 0)
60 asymbol *sym = *in_ptr++;
62 if (strstr (sym->name, "gcc2_compiled"))
63 continue;
64 if (sym->name == NULL || sym->name[0] == '\0')
65 continue;
66 if (sym->flags & (BSF_DEBUGGING))
67 continue;
68 if (bfd_is_und_section (sym->section)
69 || bfd_is_com_section (sym->section))
70 continue;
72 *out_ptr++ = sym;
74 return out_ptr - symbols;
77 static int
78 compare_symbols (const void *ap, const void *bp)
80 const asymbol *a = *(const asymbol **) ap;
81 const asymbol *b = *(const asymbol **) bp;
83 if (bfd_asymbol_value (a) > bfd_asymbol_value (b))
84 return 1;
85 else if (bfd_asymbol_value (a) < bfd_asymbol_value (b))
86 return -1;
87 return 0;
90 static char opbuf[1000];
92 static int ATTRIBUTE_PRINTF (2, 3)
93 op_printf (char *buf, char *fmt, ...)
95 int ret;
96 va_list ap;
98 va_start (ap, fmt);
99 ret = vsprintf (opbuf + strlen (opbuf), fmt, ap);
100 va_end (ap);
101 return ret;
104 static int ATTRIBUTE_PRINTF (3, 4)
105 op_styled_printf (char *buf, enum disassembler_style style, char *fmt, ...)
107 int ret;
108 va_list ap;
110 va_start (ap, fmt);
111 ret = vsprintf (opbuf + strlen (opbuf), fmt, ap);
112 va_end (ap);
113 return ret;
116 static bfd *current_bfd;
118 void
119 sim_disasm_init (bfd * prog)
121 current_bfd = prog;
124 typedef struct Files
126 struct Files *next;
127 char *filename;
128 int nlines;
129 char **lines;
130 char *data;
131 } Files;
132 Files *files = 0;
134 static char *
135 load_file_and_line (const char *filename, int lineno)
137 Files *f;
138 for (f = files; f; f = f->next)
139 if (strcmp (f->filename, filename) == 0)
140 break;
141 if (!f)
143 int i;
144 struct stat s;
145 const char *found_filename, *slash;
146 FILE *file;
147 size_t ret;
149 found_filename = filename;
150 while (1)
152 if (stat (found_filename, &s) == 0)
153 break;
154 slash = strchr (found_filename, '/');
155 if (!slash)
156 return "";
157 found_filename = slash + 1;
160 f = (Files *) malloc (sizeof (Files));
161 f->next = files;
162 files = f;
163 f->filename = strdup (filename);
164 f->data = (char *) malloc (s.st_size + 2);
165 file = fopen (found_filename, "rb");
166 ret = fread (f->data, 1, s.st_size, file);
167 f->data[ret] = 0;
168 fclose (file);
170 f->nlines = 1;
171 for (i = 0; i < s.st_size; i++)
172 if (f->data[i] == '\n')
173 f->nlines++;
174 f->lines = (char **) malloc (f->nlines * sizeof (char *));
175 f->lines[0] = f->data;
176 f->nlines = 1;
177 for (i = 0; i < s.st_size; i++)
178 if (f->data[i] == '\n')
180 f->lines[f->nlines] = f->data + i + 1;
181 while (*f->lines[f->nlines] == ' '
182 || *f->lines[f->nlines] == '\t')
183 f->lines[f->nlines]++;
184 f->nlines++;
185 f->data[i] = 0;
188 if (lineno < 1 || lineno > f->nlines)
189 return "";
190 return f->lines[lineno - 1];
193 void
194 sim_disasm_one (void)
196 static int initted = 0;
197 static asymbol **symtab = 0;
198 static int symcount = 0;
199 static int last_sym = -1;
200 static struct disassemble_info info;
201 int storage, sym, bestaddr;
202 int min, max, i;
203 static asection *code_section = 0;
204 static bfd_vma code_base = 0;
205 asection *s;
206 int save_trace = trace;
208 static const char *prev_filename = "";
209 static int prev_lineno = 0;
210 const char *filename;
211 const char *functionname;
212 unsigned int lineno;
214 int mypc = get_reg (pc);
216 if (current_bfd == 0)
217 return;
219 trace = 0;
221 if (!initted)
223 initted = 1;
224 memset (&info, 0, sizeof (info));
225 INIT_DISASSEMBLE_INFO (info, stdout, op_printf, op_styled_printf);
226 info.read_memory_func = sim_dis_read;
227 info.arch = bfd_get_arch (current_bfd);
228 info.mach = bfd_get_mach (current_bfd);
229 if (info.mach == 0)
231 info.arch = bfd_arch_m32c;
232 info.mach = default_machine;
234 disassemble_init_for_target (&info);
236 storage = bfd_get_symtab_upper_bound (current_bfd);
237 if (storage > 0)
239 symtab = (asymbol **) malloc (storage);
240 symcount = bfd_canonicalize_symtab (current_bfd, symtab);
241 symcount = remove_useless_symbols (symtab, symcount);
242 qsort (symtab, symcount, sizeof (asymbol *), compare_symbols);
244 for (s = current_bfd->sections; s; s = s->next)
246 if (s->flags & SEC_CODE || code_section == 0)
248 code_section = s;
249 code_base = bfd_section_lma (s);
250 break;
255 filename = functionname = 0;
256 lineno = 0;
257 if (bfd_find_nearest_line
258 (current_bfd, code_section, symtab, mypc - code_base, &filename,
259 &functionname, &lineno))
261 if (filename && functionname && lineno)
263 if (lineno != prev_lineno || strcmp (prev_filename, filename))
265 char *the_line = load_file_and_line (filename, lineno);
266 const char *slash = strrchr (filename, '/');
267 if (!slash)
268 slash = filename;
269 else
270 slash++;
271 printf
272 ("========================================"
273 "=====================================\n");
274 printf ("\033[37;41m %s:%d: \033[33;40m %s\033[K\033[0m\n",
275 slash, lineno, the_line);
277 prev_lineno = lineno;
278 prev_filename = filename;
283 min = -1;
284 max = symcount;
285 while (min < max - 1)
287 bfd_vma sa;
288 sym = (min + max) / 2;
289 sa = bfd_asymbol_value (symtab[sym]);
290 /*printf("checking %4d %08x %s\n",
291 sym, sa, bfd_asymbol_name (symtab[sym])); */
292 if (sa > mypc)
293 max = sym;
294 else if (sa < mypc)
295 min = sym;
296 else
298 min = sym;
299 break;
302 if (min != -1 && min != last_sym)
304 bestaddr = bfd_asymbol_value (symtab[min]);
305 printf ("\033[43;30m%s", bfd_asymbol_name (symtab[min]));
306 if (bestaddr != mypc)
307 printf ("+%d", mypc - bestaddr);
308 printf (":\t\t\t\033[0m\n");
309 last_sym = min;
310 #if 0
311 if (trace == 1)
312 if (strcmp (bfd_asymbol_name (symtab[min]), "abort") == 0
313 || strcmp (bfd_asymbol_name (symtab[min]), "exit") == 0)
314 trace = 0;
315 #endif
319 opbuf[0] = 0;
320 printf ("\033[33m%06x: ", mypc);
321 max = print_insn_m32c (mypc, &info);
322 for (i = 0; i < max; i++)
323 printf ("%02x", mem_get_qi (mypc + i));
324 for (; i < 6; i++)
325 printf (" ");
326 printf ("%-16s ", opbuf);
328 printf ("\033[0m\n");
329 trace = save_trace;