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1 | /* trace.c --- tracing output for the RL78 simulator. |
2 | ||
3 | Copyright (C) 2005, 2007, 2008, 2009, 2010, 2011 | |
4 | Free Software Foundation, Inc. | |
5 | Contributed by Red Hat, Inc. | |
6 | ||
7 | This file is part of the GNU simulators. | |
8 | ||
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. | |
13 | ||
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. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | along with this program. If not, see <http://www.gnu.org/licenses/>. | |
21 | */ | |
22 | ||
23 | ||
24 | #include "config.h" | |
25 | #include <stdio.h> | |
26 | #include <stdarg.h> | |
27 | #include <string.h> | |
28 | #include <stdlib.h> | |
29 | #include <sys/types.h> | |
30 | #include <sys/stat.h> | |
31 | #include <ctype.h> | |
32 | ||
33 | #include "libiberty.h" | |
34 | #include "bfd.h" | |
35 | #include "dis-asm.h" | |
36 | ||
37 | #include "cpu.h" | |
38 | #include "mem.h" | |
39 | #include "load.h" | |
40 | ||
41 | static int | |
42 | sim_dis_read (bfd_vma memaddr, bfd_byte * ptr, unsigned int length, | |
43 | struct disassemble_info *info) | |
44 | { | |
45 | mem_get_blk (memaddr, ptr, length); | |
46 | return 0; | |
47 | } | |
48 | ||
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. */ | |
52 | ||
53 | static long | |
54 | remove_useless_symbols (asymbol ** symbols, long count) | |
55 | { | |
56 | register asymbol **in_ptr = symbols, **out_ptr = symbols; | |
57 | ||
58 | while (-- count >= 0) | |
59 | { | |
60 | asymbol *sym = *in_ptr ++; | |
61 | ||
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; | |
71 | ||
72 | *out_ptr++ = sym; | |
73 | } | |
74 | return out_ptr - symbols; | |
75 | } | |
76 | ||
77 | static int | |
78 | compare_symbols (const PTR ap, const PTR bp) | |
79 | { | |
80 | const asymbol *a = *(const asymbol **) ap; | |
81 | const asymbol *b = *(const asymbol **) bp; | |
82 | ||
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; | |
88 | } | |
89 | ||
90 | static char opbuf[1000]; | |
91 | ||
92 | static int | |
93 | op_printf (char *buf, char *fmt, ...) | |
94 | { | |
95 | int ret; | |
96 | va_list ap; | |
97 | ||
98 | va_start (ap, fmt); | |
99 | ret = vsprintf (opbuf + strlen (opbuf), fmt, ap); | |
100 | va_end (ap); | |
101 | return ret; | |
102 | } | |
103 | ||
104 | static bfd * current_bfd = NULL; | |
105 | static asymbol ** symtab = NULL; | |
106 | static int symcount = 0; | |
107 | static asection * code_section = NULL; | |
108 | static bfd_vma code_base = 0; | |
109 | static struct disassemble_info info; | |
110 | ||
111 | void | |
112 | sim_disasm_init (bfd *prog) | |
113 | { | |
114 | current_bfd = prog; | |
115 | } | |
116 | ||
117 | typedef struct Files | |
118 | { | |
119 | struct Files *next; | |
120 | char *filename; | |
121 | int nlines; | |
122 | char **lines; | |
123 | char *data; | |
124 | } Files; | |
125 | Files *files = 0; | |
126 | ||
127 | static char * | |
128 | load_file_and_line (const char *filename, int lineno) | |
129 | { | |
130 | Files *f; | |
131 | for (f = files; f; f = f->next) | |
132 | if (strcmp (f->filename, filename) == 0) | |
133 | break; | |
134 | if (!f) | |
135 | { | |
136 | int i; | |
137 | struct stat s; | |
138 | const char *found_filename, *slash; | |
139 | ||
140 | found_filename = filename; | |
141 | while (1) | |
142 | { | |
143 | if (stat (found_filename, &s) == 0) | |
144 | break; | |
145 | slash = strchr (found_filename, '/'); | |
146 | if (!slash) | |
147 | return ""; | |
148 | found_filename = slash + 1; | |
149 | } | |
150 | ||
151 | f = (Files *) xmalloc (sizeof (Files)); | |
152 | f->next = files; | |
153 | files = f; | |
154 | f->filename = xstrdup (filename); | |
155 | f->data = (char *) xmalloc (s.st_size + 2); | |
156 | FILE *file = fopen (found_filename, "rb"); | |
157 | fread (f->data, 1, s.st_size, file); | |
158 | f->data[s.st_size] = 0; | |
159 | fclose (file); | |
160 | ||
161 | f->nlines = 1; | |
162 | for (i = 0; i < s.st_size; i ++) | |
163 | if (f->data[i] == '\n') | |
164 | f->nlines ++; | |
165 | f->lines = (char **) xmalloc (f->nlines * sizeof (char *)); | |
166 | f->lines[0] = f->data; | |
167 | f->nlines = 1; | |
168 | for (i = 0; i < s.st_size; i ++) | |
169 | if (f->data[i] == '\n') | |
170 | { | |
171 | f->lines[f->nlines] = f->data + i + 1; | |
172 | while (*f->lines[f->nlines] == ' ' | |
173 | || *f->lines[f->nlines] == '\t') | |
174 | f->lines[f->nlines] ++; | |
175 | f->nlines ++; | |
176 | f->data[i] = 0; | |
177 | } | |
178 | } | |
179 | if (lineno < 1 || lineno > f->nlines) | |
180 | return ""; | |
181 | return f->lines[lineno - 1]; | |
182 | } | |
183 | ||
184 | int | |
185 | sim_get_current_source_location (const char ** pfilename, | |
186 | const char ** pfunctionname, | |
187 | unsigned int * plineno) | |
188 | { | |
189 | static int initted = 0; | |
190 | int mypc = pc; | |
191 | ||
192 | if (current_bfd == NULL) | |
193 | return 0; | |
194 | ||
195 | if (!initted) | |
196 | { | |
197 | int storage; | |
198 | asection * s; | |
199 | ||
200 | initted = 1; | |
201 | memset (& info, 0, sizeof (info)); | |
202 | INIT_DISASSEMBLE_INFO (info, stdout, op_printf); | |
203 | info.read_memory_func = sim_dis_read; | |
204 | info.arch = bfd_get_arch (current_bfd); | |
205 | info.mach = bfd_get_mach (current_bfd); | |
206 | if (info.mach == 0) | |
207 | info.arch = bfd_arch_rl78; | |
208 | ||
209 | disassemble_init_for_target (& info); | |
210 | ||
211 | storage = bfd_get_symtab_upper_bound (current_bfd); | |
212 | if (storage > 0) | |
213 | { | |
214 | symtab = (asymbol **) xmalloc (storage); | |
215 | symcount = bfd_canonicalize_symtab (current_bfd, symtab); | |
216 | symcount = remove_useless_symbols (symtab, symcount); | |
217 | qsort (symtab, symcount, sizeof (asymbol *), compare_symbols); | |
218 | } | |
219 | ||
220 | for (s = current_bfd->sections; s; s = s->next) | |
221 | { | |
222 | if (s->flags & SEC_CODE || code_section == 0) | |
223 | { | |
224 | code_section = s; | |
225 | code_base = bfd_section_lma (current_bfd, s); | |
226 | break; | |
227 | } | |
228 | } | |
229 | } | |
230 | ||
231 | *pfilename = *pfunctionname = NULL; | |
232 | *plineno = 0; | |
233 | ||
234 | bfd_find_nearest_line | |
235 | (current_bfd, code_section, symtab, mypc - code_base, | |
236 | pfilename, pfunctionname, plineno); | |
237 | ||
238 | return 1; | |
239 | } | |
240 | ||
241 | void | |
242 | sim_disasm_one (void) | |
243 | { | |
244 | static int last_sym = -1; | |
245 | static const char * prev_filename = ""; | |
246 | static int prev_lineno = 0; | |
247 | const char * filename; | |
248 | const char * functionname; | |
249 | unsigned int lineno; | |
250 | int sym, bestaddr; | |
251 | int min, max, i; | |
252 | int save_trace = trace; | |
253 | int mypc = pc; | |
254 | ||
255 | if (! sim_get_current_source_location (& filename, & functionname, & lineno)) | |
256 | return; | |
257 | ||
258 | trace = 0; | |
259 | ||
260 | if (filename && functionname && lineno) | |
261 | { | |
262 | if (lineno != prev_lineno || strcmp (prev_filename, filename)) | |
263 | { | |
264 | char * the_line = load_file_and_line (filename, lineno); | |
265 | const char * slash = strrchr (filename, '/'); | |
266 | ||
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); | |
276 | } | |
277 | prev_lineno = lineno; | |
278 | prev_filename = filename; | |
279 | } | |
280 | ||
281 | min = -1; | |
282 | max = symcount; | |
283 | while (min < max - 1) | |
284 | { | |
285 | bfd_vma sa; | |
286 | ||
287 | sym = (min + max) / 2; | |
288 | sa = bfd_asymbol_value (symtab[sym]); | |
289 | /*printf ("checking %4d %08x %s\n", | |
290 | sym, sa, bfd_asymbol_name (symtab[sym])); */ | |
291 | if (sa > mypc) | |
292 | max = sym; | |
293 | else if (sa < mypc) | |
294 | min = sym; | |
295 | else | |
296 | { | |
297 | min = sym; | |
298 | break; | |
299 | } | |
300 | } | |
301 | ||
302 | if (min != -1 && min != last_sym) | |
303 | { | |
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 | |
316 | } | |
317 | ||
318 | #define TCR0 0xf0180 | |
319 | ||
320 | opbuf[0] = 0; | |
321 | #ifdef CYCLE_ACCURATE | |
322 | printf ("\033[33m %04u %06x: ", (int)(regs.cycle_count % 10000), mypc); | |
323 | #else | |
324 | printf ("\033[33m %08llx %06x: ", total_clocks, mypc); | |
325 | #endif | |
326 | ||
327 | max = print_insn_rl78 (mypc, & info); | |
328 | ||
329 | for (i = 0; i < max; i ++) | |
330 | printf ("%02x", mem_get_qi (mypc + i)); | |
331 | ||
332 | do | |
333 | { | |
334 | printf (" "); | |
335 | i ++; | |
336 | } | |
337 | while (i < 6); | |
338 | ||
339 | printf ("%-16s ", opbuf); | |
340 | ||
341 | printf ("\033[0m\n"); | |
342 | trace = save_trace; | |
343 | } |