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d45a4bef JB |
1 | /* trace.c --- tracing output for the M32C simulator. |
2 | ||
7b6bb8da JB |
3 | Copyright (C) 2005, 2007, 2008, 2009, 2010, 2011 |
4 | Free Software Foundation, Inc. | |
d45a4bef JB |
5 | Contributed by Red Hat, Inc. |
6 | ||
7 | This file is part of the GNU simulators. | |
8 | ||
4744ac1b JB |
9 | This program is free software; you can redistribute it and/or modify |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 3 of the License, or | |
12 | (at your option) any later version. | |
d45a4bef | 13 | |
4744ac1b JB |
14 | This program is distributed in the hope that it will be useful, |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
d45a4bef JB |
18 | |
19 | You should have received a copy of the GNU General Public License | |
4744ac1b | 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
d45a4bef JB |
21 | |
22 | ||
23 | #include <stdio.h> | |
24 | #include <stdarg.h> | |
25 | #include <string.h> | |
26 | #include <stdlib.h> | |
27 | #include <sys/types.h> | |
28 | #include <sys/stat.h> | |
29 | #include <ctype.h> | |
30 | ||
31 | #include "bfd.h" | |
32 | #include "dis-asm.h" | |
33 | #include "m32c-desc.h" | |
34 | ||
35 | #include "cpu.h" | |
36 | #include "mem.h" | |
37 | #include "load.h" | |
38 | ||
39 | static int | |
40 | sim_dis_read (bfd_vma memaddr, bfd_byte * ptr, unsigned int length, | |
41 | struct disassemble_info *info) | |
42 | { | |
43 | mem_get_blk (memaddr, ptr, length); | |
44 | return 0; | |
45 | } | |
46 | ||
47 | /* Filter out (in place) symbols that are useless for disassembly. | |
48 | COUNT is the number of elements in SYMBOLS. | |
49 | Return the number of useful symbols. */ | |
50 | ||
51 | static long | |
52 | remove_useless_symbols (asymbol ** symbols, long count) | |
53 | { | |
54 | register asymbol **in_ptr = symbols, **out_ptr = symbols; | |
55 | ||
56 | while (--count >= 0) | |
57 | { | |
58 | asymbol *sym = *in_ptr++; | |
59 | ||
60 | if (strstr (sym->name, "gcc2_compiled")) | |
61 | continue; | |
62 | if (sym->name == NULL || sym->name[0] == '\0') | |
63 | continue; | |
64 | if (sym->flags & (BSF_DEBUGGING)) | |
65 | continue; | |
66 | if (bfd_is_und_section (sym->section) | |
67 | || bfd_is_com_section (sym->section)) | |
68 | continue; | |
69 | ||
70 | *out_ptr++ = sym; | |
71 | } | |
72 | return out_ptr - symbols; | |
73 | } | |
74 | ||
75 | static int | |
76 | compare_symbols (const PTR ap, const PTR bp) | |
77 | { | |
78 | const asymbol *a = *(const asymbol **) ap; | |
79 | const asymbol *b = *(const asymbol **) bp; | |
80 | ||
81 | if (bfd_asymbol_value (a) > bfd_asymbol_value (b)) | |
82 | return 1; | |
83 | else if (bfd_asymbol_value (a) < bfd_asymbol_value (b)) | |
84 | return -1; | |
85 | return 0; | |
86 | } | |
87 | ||
88 | static char opbuf[1000]; | |
89 | ||
90 | static int | |
91 | op_printf (char *buf, char *fmt, ...) | |
92 | { | |
93 | int ret; | |
94 | va_list ap; | |
95 | ||
96 | va_start (ap, fmt); | |
97 | ret = vsprintf (opbuf + strlen (opbuf), fmt, ap); | |
98 | va_end (ap); | |
99 | return ret; | |
100 | } | |
101 | ||
102 | static bfd *current_bfd; | |
103 | ||
104 | void | |
3877a145 | 105 | sim_disasm_init (bfd * prog) |
d45a4bef JB |
106 | { |
107 | current_bfd = prog; | |
108 | } | |
109 | ||
110 | typedef struct Files | |
111 | { | |
112 | struct Files *next; | |
113 | char *filename; | |
114 | int nlines; | |
115 | char **lines; | |
116 | char *data; | |
117 | } Files; | |
118 | Files *files = 0; | |
119 | ||
120 | static char * | |
121 | load_file_and_line (const char *filename, int lineno) | |
122 | { | |
123 | Files *f; | |
124 | for (f = files; f; f = f->next) | |
125 | if (strcmp (f->filename, filename) == 0) | |
126 | break; | |
127 | if (!f) | |
128 | { | |
129 | int i; | |
130 | struct stat s; | |
131 | const char *found_filename, *slash; | |
132 | ||
133 | found_filename = filename; | |
134 | while (1) | |
135 | { | |
136 | if (stat (found_filename, &s) == 0) | |
137 | break; | |
138 | slash = strchr (found_filename, '/'); | |
139 | if (!slash) | |
140 | return ""; | |
141 | found_filename = slash + 1; | |
142 | } | |
143 | ||
144 | f = (Files *) malloc (sizeof (Files)); | |
145 | f->next = files; | |
146 | files = f; | |
147 | f->filename = strdup (filename); | |
148 | f->data = (char *) malloc (s.st_size + 2); | |
149 | FILE *file = fopen (found_filename, "rb"); | |
150 | fread (f->data, 1, s.st_size, file); | |
151 | f->data[s.st_size] = 0; | |
152 | fclose (file); | |
153 | ||
154 | f->nlines = 1; | |
155 | for (i = 0; i < s.st_size; i++) | |
156 | if (f->data[i] == '\n') | |
157 | f->nlines++; | |
158 | f->lines = (char **) malloc (f->nlines * sizeof (char *)); | |
159 | f->lines[0] = f->data; | |
160 | f->nlines = 1; | |
161 | for (i = 0; i < s.st_size; i++) | |
162 | if (f->data[i] == '\n') | |
163 | { | |
164 | f->lines[f->nlines] = f->data + i + 1; | |
165 | while (*f->lines[f->nlines] == ' ' | |
166 | || *f->lines[f->nlines] == '\t') | |
167 | f->lines[f->nlines]++; | |
168 | f->nlines++; | |
169 | f->data[i] = 0; | |
170 | } | |
171 | } | |
172 | if (lineno < 1 || lineno > f->nlines) | |
173 | return ""; | |
174 | return f->lines[lineno - 1]; | |
175 | } | |
176 | ||
177 | void | |
178 | sim_disasm_one () | |
179 | { | |
180 | static int initted = 0; | |
181 | static asymbol **symtab = 0; | |
182 | static int symcount = 0; | |
183 | static int last_sym = -1; | |
184 | static struct disassemble_info info; | |
185 | int storage, sym, bestaddr; | |
186 | int min, max, i; | |
187 | static asection *code_section = 0; | |
188 | static bfd_vma code_base = 0; | |
189 | asection *s; | |
190 | int save_trace = trace; | |
191 | ||
192 | static const char *prev_filename = ""; | |
193 | static int prev_lineno = 0; | |
194 | const char *filename; | |
195 | const char *functionname; | |
196 | unsigned int lineno; | |
197 | ||
198 | int mypc = get_reg (pc); | |
199 | ||
200 | if (current_bfd == 0) | |
201 | return; | |
202 | ||
203 | trace = 0; | |
204 | ||
205 | if (!initted) | |
206 | { | |
207 | initted = 1; | |
208 | memset (&info, 0, sizeof (info)); | |
209 | INIT_DISASSEMBLE_INFO (info, stdout, op_printf); | |
210 | info.read_memory_func = sim_dis_read; | |
211 | info.arch = bfd_get_arch (current_bfd); | |
212 | info.mach = bfd_get_mach (current_bfd); | |
213 | if (info.mach == 0) | |
214 | { | |
215 | info.arch = bfd_arch_m32c; | |
216 | info.mach = default_machine; | |
217 | } | |
218 | disassemble_init_for_target (&info); | |
219 | ||
220 | storage = bfd_get_symtab_upper_bound (current_bfd); | |
221 | if (storage > 0) | |
222 | { | |
223 | symtab = (asymbol **) malloc (storage); | |
224 | symcount = bfd_canonicalize_symtab (current_bfd, symtab); | |
225 | symcount = remove_useless_symbols (symtab, symcount); | |
226 | qsort (symtab, symcount, sizeof (asymbol *), compare_symbols); | |
227 | } | |
228 | for (s = current_bfd->sections; s; s = s->next) | |
229 | { | |
230 | if (s->flags & SEC_CODE || code_section == 0) | |
231 | { | |
232 | code_section = s; | |
233 | code_base = bfd_section_lma (current_bfd, s); | |
234 | break; | |
235 | } | |
236 | } | |
237 | } | |
238 | ||
239 | filename = functionname = 0; | |
240 | lineno = 0; | |
241 | if (bfd_find_nearest_line | |
242 | (current_bfd, code_section, symtab, mypc - code_base, &filename, | |
243 | &functionname, &lineno)) | |
244 | { | |
245 | if (filename && functionname && lineno) | |
246 | { | |
247 | if (lineno != prev_lineno || strcmp (prev_filename, filename)) | |
248 | { | |
249 | char *the_line = load_file_and_line (filename, lineno); | |
250 | const char *slash = strrchr (filename, '/'); | |
251 | if (!slash) | |
252 | slash = filename; | |
253 | else | |
254 | slash++; | |
255 | printf | |
256 | ("========================================" | |
3877a145 | 257 | "=====================================\n"); |
d45a4bef JB |
258 | printf ("\033[37;41m %s:%d: \033[33;40m %s\033[K\033[0m\n", |
259 | slash, lineno, the_line); | |
260 | } | |
261 | prev_lineno = lineno; | |
262 | prev_filename = filename; | |
263 | } | |
264 | } | |
265 | ||
266 | { | |
267 | min = -1; | |
268 | max = symcount; | |
269 | while (min < max - 1) | |
270 | { | |
271 | bfd_vma sa; | |
272 | sym = (min + max) / 2; | |
273 | sa = bfd_asymbol_value (symtab[sym]); | |
274 | /*printf("checking %4d %08x %s\n", | |
3877a145 | 275 | sym, sa, bfd_asymbol_name (symtab[sym])); */ |
d45a4bef JB |
276 | if (sa > mypc) |
277 | max = sym; | |
278 | else if (sa < mypc) | |
279 | min = sym; | |
280 | else | |
281 | { | |
282 | min = sym; | |
283 | break; | |
284 | } | |
285 | } | |
286 | if (min != -1 && min != last_sym) | |
287 | { | |
288 | bestaddr = bfd_asymbol_value (symtab[min]); | |
289 | printf ("\033[43;30m%s", bfd_asymbol_name (symtab[min])); | |
290 | if (bestaddr != mypc) | |
291 | printf ("+%d", mypc - bestaddr); | |
292 | printf (":\t\t\t\033[0m\n"); | |
293 | last_sym = min; | |
294 | #if 0 | |
295 | if (trace == 1) | |
296 | if (strcmp (bfd_asymbol_name (symtab[min]), "abort") == 0 | |
297 | || strcmp (bfd_asymbol_name (symtab[min]), "exit") == 0) | |
298 | trace = 0; | |
299 | #endif | |
300 | } | |
301 | } | |
302 | ||
303 | opbuf[0] = 0; | |
304 | printf ("\033[33m%06x: ", mypc); | |
305 | max = print_insn_m32c (mypc, &info); | |
306 | for (i = 0; i < max; i++) | |
307 | printf ("%02x", mem_get_qi (mypc + i)); | |
308 | for (; i < 6; i++) | |
309 | printf (" "); | |
310 | printf ("%-16s ", opbuf); | |
311 | ||
312 | printf ("\033[0m\n"); | |
313 | trace = save_trace; | |
314 | } |