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3346cfda NC |
1 | /* trace.c --- tracing output for the MSP430 simulator. |
2 | ||
32d0add0 | 3 | Copyright (C) 2005-2015 Free Software Foundation, Inc. |
3346cfda NC |
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 | ||
23 | #include "config.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> | |
31 | ||
32 | #include "libiberty.h" | |
33 | #include "bfd.h" | |
34 | #include "dis-asm.h" | |
35 | ||
36 | static int | |
37 | sim_dis_read (bfd_vma memaddr, bfd_byte * ptr, unsigned int length, | |
38 | struct disassemble_info *info) | |
39 | { | |
40 | return 0; | |
41 | } | |
42 | ||
43 | /* Filter out (in place) symbols that are useless for disassembly. | |
44 | COUNT is the number of elements in SYMBOLS. | |
45 | Return the number of useful symbols. */ | |
46 | ||
47 | static long | |
48 | remove_useless_symbols (asymbol ** symbols, long count) | |
49 | { | |
50 | asymbol **in_ptr = symbols, **out_ptr = symbols; | |
51 | ||
52 | while (-- count >= 0) | |
53 | { | |
54 | asymbol *sym = *in_ptr ++; | |
55 | ||
56 | if (strstr (sym->name, "gcc2_compiled")) | |
57 | continue; | |
58 | if (sym->name == NULL || sym->name[0] == '\0') | |
59 | continue; | |
60 | if (sym->flags & (BSF_DEBUGGING)) | |
61 | continue; | |
62 | if (bfd_is_und_section (sym->section) | |
63 | || bfd_is_com_section (sym->section)) | |
64 | continue; | |
65 | ||
66 | if (sym->name[0] == '.' && sym->name[1] == 'L') | |
67 | continue; | |
68 | ||
69 | /* If the symbol ends in ^A or ^B it is | |
70 | an assembler generated local label. */ | |
71 | if (sym->name[strlen (sym->name) - 1] < 32) | |
72 | continue; | |
73 | ||
74 | *out_ptr++ = sym; | |
75 | } | |
76 | return out_ptr - symbols; | |
77 | } | |
78 | ||
79 | static int | |
80 | compare_symbols (const PTR ap, const PTR bp) | |
81 | { | |
82 | const asymbol *a = *(const asymbol **) ap; | |
83 | const asymbol *b = *(const asymbol **) bp; | |
84 | ||
85 | if (bfd_asymbol_value (a) > bfd_asymbol_value (b)) | |
86 | return 1; | |
87 | else if (bfd_asymbol_value (a) < bfd_asymbol_value (b)) | |
88 | return -1; | |
89 | return 0; | |
90 | } | |
91 | ||
92 | static char opbuf[1000]; | |
93 | ||
94 | static int | |
95 | op_printf (char *buf, char *fmt, ...) | |
96 | { | |
97 | int ret; | |
98 | va_list ap; | |
99 | ||
100 | va_start (ap, fmt); | |
101 | ret = vsprintf (opbuf + strlen (opbuf), fmt, ap); | |
102 | va_end (ap); | |
103 | return ret; | |
104 | } | |
105 | ||
106 | static bfd * current_bfd = NULL; | |
107 | static asymbol ** symtab = NULL; | |
108 | static int symcount = 0; | |
109 | static asection * code_section = NULL; | |
110 | static bfd_vma code_base = 0; | |
111 | static struct disassemble_info info; | |
112 | ||
113 | void | |
114 | msp430_trace_init (bfd *prog) | |
115 | { | |
116 | current_bfd = prog; | |
117 | } | |
118 | ||
119 | typedef struct Files | |
120 | { | |
121 | struct Files *next; | |
122 | char *filename; | |
123 | int nlines; | |
124 | char **lines; | |
125 | char *data; | |
126 | } Files; | |
127 | Files *files = 0; | |
128 | ||
129 | static char * | |
130 | load_file_and_line (const char *filename, int lineno) | |
131 | { | |
132 | Files *f; | |
133 | for (f = files; f; f = f->next) | |
134 | if (strcmp (f->filename, filename) == 0) | |
135 | break; | |
136 | if (!f) | |
137 | { | |
138 | int i; | |
139 | struct stat s; | |
140 | const char *found_filename, *slash; | |
141 | ||
142 | found_filename = filename; | |
143 | while (1) | |
144 | { | |
145 | if (stat (found_filename, &s) == 0) | |
146 | break; | |
147 | slash = strchr (found_filename, '/'); | |
148 | if (!slash) | |
149 | return ""; | |
150 | found_filename = slash + 1; | |
151 | } | |
152 | ||
153 | f = (Files *) xmalloc (sizeof (Files)); | |
154 | f->next = files; | |
155 | files = f; | |
156 | f->filename = xstrdup (filename); | |
157 | f->data = (char *) xmalloc (s.st_size + 2); | |
158 | FILE *file = fopen (found_filename, "rb"); | |
159 | fread (f->data, 1, s.st_size, file); | |
160 | f->data[s.st_size] = 0; | |
161 | fclose (file); | |
162 | ||
163 | f->nlines = 1; | |
164 | for (i = 0; i < s.st_size; i ++) | |
165 | if (f->data[i] == '\n') | |
166 | f->nlines ++; | |
167 | f->lines = (char **) xmalloc (f->nlines * sizeof (char *)); | |
168 | f->lines[0] = f->data; | |
169 | f->nlines = 1; | |
170 | for (i = 0; i < s.st_size; i ++) | |
171 | if (f->data[i] == '\n') | |
172 | { | |
173 | f->lines[f->nlines] = f->data + i + 1; | |
174 | while (*f->lines[f->nlines] == ' ' | |
175 | || *f->lines[f->nlines] == '\t') | |
176 | f->lines[f->nlines] ++; | |
177 | f->nlines ++; | |
178 | f->data[i] = 0; | |
179 | } | |
180 | } | |
181 | if (lineno < 1 || lineno > f->nlines) | |
182 | return ""; | |
183 | return f->lines[lineno - 1]; | |
184 | } | |
185 | ||
186 | int | |
187 | msp430_get_current_source_location (int mypc, | |
188 | const char ** pfilename, | |
189 | const char ** pfunctionname, | |
190 | unsigned int * plineno) | |
191 | { | |
192 | static int initted = 0; | |
193 | ||
194 | if (current_bfd == NULL) | |
195 | { | |
196 | printf("no bfd\n"); | |
197 | return 0; | |
198 | } | |
199 | ||
200 | if (!initted) | |
201 | { | |
202 | int storage; | |
203 | asection * s; | |
204 | ||
205 | initted = 1; | |
206 | memset (& info, 0, sizeof (info)); | |
207 | INIT_DISASSEMBLE_INFO (info, stdout, op_printf); | |
208 | info.read_memory_func = sim_dis_read; | |
209 | info.arch = bfd_get_arch (current_bfd); | |
210 | info.mach = bfd_get_mach (current_bfd); | |
211 | if (info.mach == 0) | |
212 | info.arch = bfd_arch_msp430; | |
213 | ||
214 | disassemble_init_for_target (& info); | |
215 | ||
216 | storage = bfd_get_symtab_upper_bound (current_bfd); | |
217 | if (storage > 0) | |
218 | { | |
219 | symtab = (asymbol **) xmalloc (storage); | |
220 | symcount = bfd_canonicalize_symtab (current_bfd, symtab); | |
221 | symcount = remove_useless_symbols (symtab, symcount); | |
222 | qsort (symtab, symcount, sizeof (asymbol *), compare_symbols); | |
223 | } | |
224 | ||
225 | for (s = current_bfd->sections; s; s = s->next) | |
226 | { | |
227 | if (s->flags & SEC_CODE || code_section == 0) | |
228 | { | |
229 | code_section = s; | |
230 | code_base = bfd_section_lma (current_bfd, s); | |
231 | break; | |
232 | } | |
233 | } | |
234 | } | |
235 | ||
236 | *pfilename = *pfunctionname = NULL; | |
237 | *plineno = 0; | |
238 | ||
239 | bfd_find_nearest_line | |
240 | (current_bfd, code_section, symtab, mypc - code_base, | |
241 | pfilename, pfunctionname, plineno); | |
242 | ||
243 | return 1; | |
244 | } | |
245 | ||
246 | void | |
247 | msp430_trace_one (int mypc) | |
248 | { | |
249 | static int last_sym = -1; | |
250 | static const char * prev_filename = ""; | |
251 | static int prev_lineno = 0; | |
252 | const char * filename; | |
253 | const char * functionname; | |
254 | unsigned int lineno; | |
255 | int sym, bestaddr; | |
256 | int min, max, i; | |
257 | ||
258 | if (! msp430_get_current_source_location (mypc, & filename, & functionname, & lineno)) | |
259 | return; | |
260 | ||
261 | if (filename && functionname && lineno) | |
262 | { | |
263 | if (lineno != prev_lineno || strcmp (prev_filename, filename)) | |
264 | { | |
265 | char * the_line = load_file_and_line (filename, lineno); | |
266 | const char * slash = strrchr (filename, '/'); | |
267 | ||
268 | if (!slash) | |
269 | slash = filename; | |
270 | else | |
271 | slash ++; | |
272 | fprintf | |
273 | (stderr, "========================================" | |
274 | "=====================================\n"); | |
275 | fprintf (stderr, "\033[37;41m %s:%d: \033[33;40m %s\033[K\033[0m\n", | |
276 | slash, lineno, the_line); | |
277 | } | |
278 | prev_lineno = lineno; | |
279 | prev_filename = filename; | |
280 | } | |
281 | ||
282 | min = -1; | |
283 | max = symcount; | |
284 | while (min < max - 1) | |
285 | { | |
286 | bfd_vma sa; | |
287 | ||
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 | |
297 | { | |
298 | min = sym; | |
299 | break; | |
300 | } | |
301 | } | |
302 | ||
303 | if (min != -1 && min != last_sym) | |
304 | { | |
305 | bestaddr = bfd_asymbol_value (symtab[min]); | |
306 | fprintf (stderr, "\033[43;30m%s", bfd_asymbol_name (symtab[min])); | |
307 | if (bestaddr != mypc) | |
308 | fprintf (stderr, "+%d", mypc - bestaddr); | |
309 | fprintf (stderr, ":\t\t\t\033[0m\n"); | |
310 | last_sym = min; | |
311 | #if 0 | |
312 | if (trace == 1) | |
313 | if (strcmp (bfd_asymbol_name (symtab[min]), "abort") == 0 | |
314 | || strcmp (bfd_asymbol_name (symtab[min]), "exit") == 0) | |
315 | trace = 0; | |
316 | #endif | |
317 | } | |
318 | } |