2 * File source.c - source file handling for internal debugger.
4 * Copyright (C) 1997, Eric Youngdale.
12 #include <sys/types.h>
13 #ifdef HAVE_SYS_MMAN_H
22 #define PATH_MAX _MAX_PATH
30 struct searchlist * next;
38 struct open_filelist * next;
41 unsigned int * linelist;
44 static struct open_filelist * ofiles;
46 static struct searchlist * listhead;
47 static char DEBUG_current_sourcefile[PATH_MAX];
48 static int DEBUG_start_sourceline = -1;
49 static int DEBUG_end_sourceline = -1;
54 struct searchlist * sl;
56 fprintf(stderr,"Search list :\n");
57 for(sl = listhead; sl; sl = sl->next)
59 fprintf(stderr, "\t%s\n", sl->path);
61 fprintf(stderr, "\n");
65 DEBUG_AddPath(const char * path)
67 struct searchlist * sl;
69 sl = (struct searchlist *) DBG_alloc(sizeof(struct searchlist));
76 sl->path = DBG_strdup(path);
83 struct searchlist * sl;
84 struct searchlist * nxt;
86 for(sl = listhead; sl; sl = nxt)
98 DEBUG_DisplaySource(char * sourcefile, int start, int end)
104 struct open_filelist * ol;
109 struct searchlist * sl;
112 char tmppath[PATH_MAX];
115 * First see whether we have the file open already. If so, then
116 * use that, otherwise we have to try and open it.
118 for(ol = ofiles; ol; ol = ol->next)
120 if( strcmp(ol->path, sourcefile) == 0 )
129 * Try again, stripping the path from the opened file.
131 basename = strrchr(sourcefile, '\\' );
133 basename = strrchr(sourcefile, '/' );
135 basename = sourcefile;
139 for(ol = ofiles; ol; ol = ol->next)
141 if( strcmp(ol->path, basename) == 0 )
152 * Crapola. We need to try and open the file.
154 status = stat(sourcefile, &statbuf);
157 strcpy(tmppath, sourcefile);
159 else if( (status = stat(basename, &statbuf)) != -1 )
161 strcpy(tmppath, basename);
165 for(sl = listhead; sl; sl = sl->next)
167 strcpy(tmppath, sl->path);
168 if( tmppath[strlen(tmppath)-1] != '/' )
170 strcat(tmppath, "/");
173 * Now append the base file name.
175 strcat(tmppath, basename);
177 status = stat(tmppath, &statbuf);
187 * Still couldn't find it. Ask user for path to add.
189 fprintf(stderr,"Enter path to file %s: ", sourcefile);
190 fgets(tmppath, sizeof(tmppath), stdin);
192 if( tmppath[strlen(tmppath)-1] == '\n' )
194 tmppath[strlen(tmppath)-1] = '\0';
197 if( tmppath[strlen(tmppath)-1] != '/' )
199 strcat(tmppath, "/");
202 * Now append the base file name.
204 strcat(tmppath, basename);
206 status = stat(tmppath, &statbuf);
210 * OK, I guess the user doesn't really want to see it
213 ol = (struct open_filelist *) DBG_alloc(sizeof(*ol));
214 ol->path = DBG_strdup(sourcefile);
215 ol->real_path = NULL;
220 fprintf(stderr,"Unable to open file %s\n", tmppath);
226 * Create header for file.
228 ol = (struct open_filelist *) DBG_alloc(sizeof(*ol));
229 ol->path = DBG_strdup(sourcefile);
230 ol->real_path = DBG_strdup(tmppath);
234 ol->size = statbuf.st_size;
238 * Now open and map the file.
240 fd = open(tmppath, O_RDONLY);
246 addr = mmap(0, statbuf.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
247 if( addr == (char *) -1 )
253 * Now build up the line number mapping table.
257 while(pnt < addr + ol->size )
266 ol->linelist = (unsigned int*) DBG_alloc( ol->nlines * sizeof(unsigned int) );
270 ol->linelist[nlines++] = 0;
271 while(pnt < addr + ol->size )
275 ol->linelist[nlines++] = pnt - addr;
278 ol->linelist[nlines++] = pnt - addr;
284 * We know what the file is, we just need to reopen it and remap it.
286 fd = open(ol->real_path, O_RDONLY);
292 addr = mmap(0, ol->size, PROT_READ, MAP_PRIVATE, fd, 0);
293 if( addr == (char *) -1 )
300 * All we need to do is to display the source lines here.
303 for(i=start - 1; i <= end - 1; i++)
305 if( i < 0 || i >= ol->nlines - 1)
311 memset(&buffer, 0, sizeof(buffer));
312 if( ol->linelist[i+1] != ol->linelist[i] )
314 memcpy(&buffer, addr + ol->linelist[i],
315 (ol->linelist[i+1] - ol->linelist[i]) - 1);
317 fprintf(stderr,"%d\t%s\n", i + 1, buffer);
320 munmap(addr, ol->size);
328 DEBUG_List(struct list_id * source1, struct list_id * source2,
337 * We need to see what source file we need. Hopefully we only have
338 * one specified, otherwise we might as well punt.
342 && source1->sourcefile != NULL
343 && source2->sourcefile != NULL
344 && strcmp(source1->sourcefile, source2->sourcefile) != 0 )
346 fprintf(stderr, "Ambiguous source file specification.\n");
351 if( source1 != NULL && source1->sourcefile != NULL )
353 sourcefile = source1->sourcefile;
356 if( sourcefile == NULL
358 && source2->sourcefile != NULL )
360 sourcefile = source2->sourcefile;
363 if( sourcefile == NULL )
365 sourcefile = (char *) &DEBUG_current_sourcefile;
368 if( sourcefile == NULL )
370 fprintf(stderr, "No source file specified.\n");
375 * Now figure out the line number range to be listed.
380 if( source1 != NULL )
382 start = source1->line;
385 if( source2 != NULL )
390 if( start == -1 && end == -1 )
394 end = DEBUG_start_sourceline;
399 start = DEBUG_end_sourceline;
403 else if( start == -1 )
413 * Now call this function to do the dirty work.
415 rtn = DEBUG_DisplaySource(sourcefile, start, end);
417 if( sourcefile != (char *) &DEBUG_current_sourcefile )
419 strcpy(DEBUG_current_sourcefile, sourcefile);
421 DEBUG_start_sourceline = start;
422 DEBUG_end_sourceline = end;
425 DBG_ADDR DEBUG_LastDisassemble={NULL,0,0};
428 _disassemble(DBG_ADDR *addr)
432 DEBUG_PrintAddress( addr, DEBUG_CurrThread->dbg_mode, TRUE );
433 fprintf(stderr,": ");
434 if (!DEBUG_READ_MEM_VERBOSE((void*)DEBUG_ToLinear(addr), &ch, sizeof(ch))) return 0;
435 DEBUG_Disasm( addr, TRUE );
436 fprintf(stderr,"\n");
441 _disassemble_fixaddr(DBG_ADDR *addr) {
443 struct datatype *testtype;
445 DEBUG_FixAddress(addr, DEBUG_context.SegCs);
446 if( addr->type != NULL )
448 if( addr->type == DEBUG_TypeIntConst )
451 * We know that we have the actual offset stored somewhere
452 * else in 32-bit space. Grab it, and we
457 addr->off = DEBUG_GetExprValue(addr, NULL);
462 DEBUG_TypeDerefPointer(addr, &testtype);
463 if( testtype != NULL || addr->type == DEBUG_TypeIntConst )
464 addr->off = DEBUG_GetExprValue(addr, NULL);
467 else if (!addr->seg && !addr->off)
469 fprintf(stderr,"Invalid expression\n");
475 DEBUG_Disassemble(const DBG_ADDR *xstart,const DBG_ADDR *xend,int offset)
483 _disassemble_fixaddr(&start);
487 _disassemble_fixaddr(&end);
489 if (!xstart && !xend) {
490 last = DEBUG_LastDisassemble;
491 if (!last.seg && !last.off)
492 DEBUG_GetCurrentAddress( &last );
494 for (i=0;i<offset;i++)
495 if (!_disassemble(&last)) break;
496 memcpy(&DEBUG_LastDisassemble,&last,sizeof(last));
501 for (i=0;i<offset;i++)
502 if (!_disassemble(&last)) break;
503 memcpy(&DEBUG_LastDisassemble,&last,sizeof(last));
506 while (last.off <= end.off)
507 if (!_disassemble(&last)) break;
508 memcpy(&DEBUG_LastDisassemble,&last,sizeof(last));
518 DEBUG_AddPath("../../de");
521 fscanf(stdin,"%d %d", &i, &j);
522 DEBUG_DisplaySource("dumpexe.c", i, j);