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1 | /* trace.c --- tracing output for the RX simulator. |
2 | ||
3 | Copyright (C) 2005, 2007, 2008, 2009 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 | #include <stdio.h> | |
23 | #include <stdarg.h> | |
24 | #include <string.h> | |
25 | #include <stdlib.h> | |
26 | #include <sys/types.h> | |
27 | #include <sys/stat.h> | |
28 | #include <ctype.h> | |
29 | ||
30 | #include "bfd.h" | |
31 | #include "dis-asm.h" | |
32 | ||
33 | #include "cpu.h" | |
34 | #include "mem.h" | |
35 | #include "load.h" | |
36 | ||
37 | static int | |
38 | sim_dis_read (bfd_vma memaddr, bfd_byte * ptr, unsigned int length, | |
39 | struct disassemble_info *info) | |
40 | { | |
41 | int i; | |
42 | ||
43 | if (rx_big_endian) | |
44 | { | |
45 | /* See load.c for an explanation of this. */ | |
46 | for (i=0; i<length; i++) | |
47 | ptr[i] = mem_get_qi ((memaddr + i) ^ 3); | |
48 | } | |
49 | else | |
50 | mem_get_blk (memaddr, ptr, length); | |
51 | return 0; | |
52 | } | |
53 | ||
54 | /* Filter out (in place) symbols that are useless for disassembly. | |
55 | COUNT is the number of elements in SYMBOLS. | |
56 | Return the number of useful symbols. */ | |
57 | ||
58 | static long | |
59 | remove_useless_symbols (asymbol ** symbols, long count) | |
60 | { | |
61 | register asymbol **in_ptr = symbols, **out_ptr = symbols; | |
62 | ||
63 | while (--count >= 0) | |
64 | { | |
65 | asymbol *sym = *in_ptr++; | |
66 | ||
67 | if (strstr (sym->name, "gcc2_compiled")) | |
68 | continue; | |
69 | if (sym->name == NULL || sym->name[0] == '\0') | |
70 | continue; | |
71 | if (sym->flags & (BSF_DEBUGGING)) | |
72 | continue; | |
73 | if (bfd_is_und_section (sym->section) | |
74 | || bfd_is_com_section (sym->section)) | |
75 | continue; | |
76 | ||
77 | *out_ptr++ = sym; | |
78 | } | |
79 | return out_ptr - symbols; | |
80 | } | |
81 | ||
82 | static int | |
83 | compare_symbols (const PTR ap, const PTR bp) | |
84 | { | |
85 | const asymbol *a = *(const asymbol **) ap; | |
86 | const asymbol *b = *(const asymbol **) bp; | |
87 | ||
88 | if (bfd_asymbol_value (a) > bfd_asymbol_value (b)) | |
89 | return 1; | |
90 | else if (bfd_asymbol_value (a) < bfd_asymbol_value (b)) | |
91 | return -1; | |
92 | return 0; | |
93 | } | |
94 | ||
95 | static char opbuf[1000]; | |
96 | ||
97 | static int | |
98 | op_printf (char *buf, char *fmt, ...) | |
99 | { | |
100 | int ret; | |
101 | va_list ap; | |
102 | ||
103 | va_start (ap, fmt); | |
104 | ret = vsprintf (opbuf + strlen (opbuf), fmt, ap); | |
105 | va_end (ap); | |
106 | return ret; | |
107 | } | |
108 | ||
109 | static bfd * current_bfd = NULL; | |
110 | static asymbol ** symtab = NULL; | |
111 | static int symcount = 0; | |
112 | static asection * code_section = NULL; | |
113 | static bfd_vma code_base = 0; | |
114 | static struct disassemble_info info; | |
115 | ||
116 | void | |
117 | sim_disasm_init (bfd *prog) | |
118 | { | |
119 | current_bfd = prog; | |
120 | } | |
121 | ||
122 | typedef struct Files | |
123 | { | |
124 | struct Files *next; | |
125 | char *filename; | |
126 | int nlines; | |
127 | char **lines; | |
128 | char *data; | |
129 | } Files; | |
130 | Files *files = 0; | |
131 | ||
132 | static char * | |
133 | load_file_and_line (const char *filename, int lineno) | |
134 | { | |
135 | Files *f; | |
136 | for (f = files; f; f = f->next) | |
137 | if (strcmp (f->filename, filename) == 0) | |
138 | break; | |
139 | if (!f) | |
140 | { | |
141 | int i; | |
142 | struct stat s; | |
143 | const char *found_filename, *slash; | |
144 | ||
145 | found_filename = filename; | |
146 | while (1) | |
147 | { | |
148 | if (stat (found_filename, &s) == 0) | |
149 | break; | |
150 | slash = strchr (found_filename, '/'); | |
151 | if (!slash) | |
152 | return ""; | |
153 | found_filename = slash + 1; | |
154 | } | |
155 | ||
156 | f = (Files *) malloc (sizeof (Files)); | |
157 | f->next = files; | |
158 | files = f; | |
159 | f->filename = strdup (filename); | |
160 | f->data = (char *) malloc (s.st_size + 2); | |
161 | FILE *file = fopen (found_filename, "rb"); | |
162 | fread (f->data, 1, s.st_size, file); | |
163 | f->data[s.st_size] = 0; | |
164 | fclose (file); | |
165 | ||
166 | f->nlines = 1; | |
167 | for (i = 0; i < s.st_size; i++) | |
168 | if (f->data[i] == '\n') | |
169 | f->nlines++; | |
170 | f->lines = (char **) malloc (f->nlines * sizeof (char *)); | |
171 | f->lines[0] = f->data; | |
172 | f->nlines = 1; | |
173 | for (i = 0; i < s.st_size; i++) | |
174 | if (f->data[i] == '\n') | |
175 | { | |
176 | f->lines[f->nlines] = f->data + i + 1; | |
177 | while (*f->lines[f->nlines] == ' ' | |
178 | || *f->lines[f->nlines] == '\t') | |
179 | f->lines[f->nlines]++; | |
180 | f->nlines++; | |
181 | f->data[i] = 0; | |
182 | } | |
183 | } | |
184 | if (lineno < 1 || lineno > f->nlines) | |
185 | return ""; | |
186 | return f->lines[lineno - 1]; | |
187 | } | |
188 | ||
189 | int | |
190 | sim_get_current_source_location (const char ** pfilename, | |
191 | const char ** pfunctionname, | |
192 | unsigned int * plineno) | |
193 | { | |
194 | static int initted = 0; | |
195 | int mypc = get_reg (pc); | |
196 | ||
197 | if (current_bfd == NULL) | |
198 | return 0; | |
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_rx; | |
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 **) malloc (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 | sim_disasm_one (void) | |
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 | int save_trace = trace; | |
258 | int mypc = get_reg (pc); | |
259 | ||
260 | if (! sim_get_current_source_location (& filename, & functionname, & lineno)) | |
261 | return; | |
262 | ||
263 | trace = 0; | |
264 | ||
265 | if (filename && functionname && lineno) | |
266 | { | |
267 | if (lineno != prev_lineno || strcmp (prev_filename, filename)) | |
268 | { | |
269 | char * the_line = load_file_and_line (filename, lineno); | |
270 | const char * slash = strrchr (filename, '/'); | |
271 | ||
272 | if (!slash) | |
273 | slash = filename; | |
274 | else | |
275 | slash++; | |
276 | printf | |
277 | ("========================================" | |
278 | "=====================================\n"); | |
279 | printf ("\033[37;41m %s:%d: \033[33;40m %s\033[K\033[0m\n", | |
280 | slash, lineno, the_line); | |
281 | } | |
282 | prev_lineno = lineno; | |
283 | prev_filename = filename; | |
284 | } | |
285 | ||
286 | min = -1; | |
287 | max = symcount; | |
288 | while (min < max - 1) | |
289 | { | |
290 | bfd_vma sa; | |
291 | ||
292 | sym = (min + max) / 2; | |
293 | sa = bfd_asymbol_value (symtab[sym]); | |
294 | /*printf("checking %4d %08x %s\n", | |
295 | sym, sa, bfd_asymbol_name (symtab[sym])); */ | |
296 | if (sa > mypc) | |
297 | max = sym; | |
298 | else if (sa < mypc) | |
299 | min = sym; | |
300 | else | |
301 | { | |
302 | min = sym; | |
303 | break; | |
304 | } | |
305 | } | |
306 | ||
307 | if (min != -1 && min != last_sym) | |
308 | { | |
309 | bestaddr = bfd_asymbol_value (symtab[min]); | |
310 | printf ("\033[43;30m%s", bfd_asymbol_name (symtab[min])); | |
311 | if (bestaddr != mypc) | |
312 | printf ("+%d", mypc - bestaddr); | |
313 | printf (":\t\t\t\033[0m\n"); | |
314 | last_sym = min; | |
315 | #if 0 | |
316 | if (trace == 1) | |
317 | if (strcmp (bfd_asymbol_name (symtab[min]), "abort") == 0 | |
318 | || strcmp (bfd_asymbol_name (symtab[min]), "exit") == 0) | |
319 | trace = 0; | |
320 | #endif | |
321 | } | |
322 | ||
323 | opbuf[0] = 0; | |
324 | printf ("\033[33m%06x: ", mypc); | |
325 | max = print_insn_rx (mypc, & info); | |
326 | ||
327 | for (i = 0; i < max; i++) | |
328 | { | |
329 | if (rx_big_endian) | |
330 | printf ("%02x", mem_get_qi ((mypc + i) ^ 3)); | |
331 | else | |
332 | printf ("%02x", mem_get_qi (mypc + i)); | |
333 | } | |
334 | ||
335 | do | |
336 | { | |
337 | printf (" "); | |
338 | i ++; | |
339 | } | |
340 | while (i < 6); | |
341 | ||
342 | printf ("%-16s ", opbuf); | |
343 | ||
344 | printf ("\033[0m\n"); | |
345 | trace = save_trace; | |
346 | } |