1 /* Execute AIXcoff files, for GDB.
2 Copyright 1988, 1989, 1991, 1992, 1994 Free Software Foundation, Inc.
3 Derived from exec.c. Modified by IBM Corporation.
4 Donated by IBM Corporation and Cygnus Support.
6 This file is part of GDB.
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 2 of the License, or
11 (at your option) any later version.
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.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
22 /* xcoff-exec - deal with executing XCOFF files. */
26 #include <sys/types.h>
27 #include <sys/param.h>
43 #include "xcoffsolib.h"
45 /* Prototypes for local functions */
48 file_command PARAMS ((char *, int));
51 exec_close PARAMS ((int));
54 map_vmap PARAMS ((bfd *, bfd *));
56 struct section_table *exec_sections, *exec_sections_end;
58 /* Whether to open exec and core files read-only or read-write. */
62 extern int info_verbose;
64 bfd *exec_bfd; /* needed by core.c */
66 extern char *getenv();
67 extern void add_syms_addr_command ();
68 extern void symbol_file_command ();
69 static void exec_files_info();
71 struct vmap *vmap; /* current vmap */
73 extern struct target_ops exec_ops;
75 /* exec_close - done with exec file, clean up all resources. */
81 register struct vmap *vp, *nxt;
82 int need_symtab_cleanup = 0;
84 for (nxt = vmap; nxt; )
89 /* if there is an objfile associated with this bfd,
90 free_objfile() will do proper cleanup of objfile *and* bfd. */
94 free_objfile (vp->objfile);
95 need_symtab_cleanup = 1;
100 /* FIXME: This routine is #if 0'd in symfile.c. What should we
101 be doing here? Should we just free everything in
102 vp->objfile->symtabs? Should free_objfile do that? */
103 free_named_symtabs (vp->name);
109 /* exec_bfd was already closed (the exec file has a vmap entry). */
112 if (exec_ops.to_sections)
114 /* Reflect to_sections freeing in current_target if it is
115 the exec target. Otherwise target_xfer_memory (eventually
116 called from clear_symtab_users) might access the freed
117 exec_ops.to_sections via the copy in current_target. */
118 if (current_target.to_sections == exec_ops.to_sections)
120 current_target.to_sections = NULL;
121 current_target.to_sections_end = NULL;
124 free (exec_ops.to_sections);
125 exec_ops.to_sections = NULL;
126 exec_ops.to_sections_end = NULL;
129 /* If we are quitting, we don't want to call breakpoint_re_set which may
130 output messages which would just be confusing in this context. */
131 if (!quitting && need_symtab_cleanup)
132 clear_symtab_users ();
135 /* Process the first arg in ARGS as the new exec file.
137 Note that we have to explicitly ignore additional args, since we can
138 be called from file_command(), which also calls symbol_file_command()
139 which can take multiple args. */
142 exec_file_command (filename, from_tty)
146 target_preopen (from_tty);
148 /* Remove any previous exec file. */
149 unpush_target (&exec_ops);
151 /* Now open and digest the file the user requested, if any. */
155 char *scratch_pathname;
158 filename = tilde_expand (filename);
159 make_cleanup (free, filename);
161 scratch_chan = openp (getenv ("PATH"), 1, filename,
162 write_files? O_RDWR: O_RDONLY, 0,
164 if (scratch_chan < 0)
165 perror_with_name (filename);
167 exec_bfd = bfd_fdopenr (scratch_pathname, gnutarget, scratch_chan);
169 error ("Could not open `%s' as an executable file: %s",
170 scratch_pathname, bfd_errmsg(bfd_get_error ()));
172 /* make sure we have an object file */
174 if (!bfd_check_format (exec_bfd, bfd_object))
175 error ("\"%s\": not in executable format: %s.", scratch_pathname,
176 bfd_errmsg (bfd_get_error ()));
178 /* setup initial vmap */
180 map_vmap (exec_bfd, 0);
182 error ("Can't find the file sections in `%s': %s", exec_bfd->filename,
183 bfd_errmsg(bfd_get_error ()));
185 if (build_section_table (exec_bfd, &exec_ops.to_sections,
186 &exec_ops.to_sections_end))
187 error ("Can't find the file sections in `%s': %s", exec_bfd->filename,
188 bfd_errmsg (bfd_get_error ()));
190 /* make sure core, if present, matches */
193 push_target(&exec_ops);
195 /* Tell display code (if any) about the changed file name. */
196 if (exec_file_display_hook)
197 (*exec_file_display_hook) (filename);
201 exec_close (0); /* just in case */
203 printf_unfiltered ("No exec file now.\n");
207 /* Set both the exec file and the symbol file, in one command. What a
208 novelty. Why did GDB go through four major releases before this
209 command was added? */
212 file_command (arg, from_tty)
216 /* FIXME, if we lose on reading the symbol file, we should revert
217 the exec file, but that's rough. */
218 exec_file_command (arg, from_tty);
219 symbol_file_command (arg, from_tty);
222 /* Locate all mappable sections of a BFD file.
223 table_pp_char is a char * to get it through bfd_map_over_sections;
224 we cast it back to its proper type. */
227 add_to_section_table (abfd, asect, table_pp_char)
232 struct section_table **table_pp = (struct section_table **)table_pp_char;
235 aflag = bfd_get_section_flags (abfd, asect);
236 /* FIXME, we need to handle BSS segment here...it alloc's but doesn't load */
237 if (!(aflag & SEC_LOAD))
239 if (0 == bfd_section_size (abfd, asect))
241 (*table_pp)->bfd = abfd;
242 (*table_pp)->the_bfd_section = asect;
243 (*table_pp)->addr = bfd_section_vma (abfd, asect);
244 (*table_pp)->endaddr = (*table_pp)->addr + bfd_section_size (abfd, asect);
249 build_section_table (some_bfd, start, end)
251 struct section_table **start, **end;
255 count = bfd_count_sections (some_bfd);
257 fatal ("aborting"); /* return 1? */
260 *start = (struct section_table *) xmalloc (count * sizeof (**start));
262 bfd_map_over_sections (some_bfd, add_to_section_table, (char *) end);
263 if (*end > *start + count)
265 /* We could realloc the table, but it probably loses for most files. */
270 bfdsec_to_vmap(bf, sect, arg3)
275 struct vmap_and_bfd *vmap_bfd = (struct vmap_and_bfd *) arg3;
276 register struct vmap *vp;
277 vp = vmap_bfd->pvmap;
279 if ((bfd_get_section_flags (bf, sect) & SEC_LOAD) == 0)
282 if (STREQ(bfd_section_name (bf, sect), ".text"))
285 vp->tend = vp->tstart + bfd_section_size (bf, sect);
287 /* When it comes to this adjustment value, in contrast to our previous
288 belief shared objects should behave the same as the main load segment.
289 This is the offset from the beginning of text section to the first
292 vp->tadj = sect->filepos - bfd_section_vma (bf, sect);
294 else if (STREQ(bfd_section_name (bf, sect), ".data"))
297 vp->dend = vp->dstart + bfd_section_size (bf, sect);
299 else if (STREQ(bfd_section_name(bf, sect), ".bss")) /* FIXMEmgo */
300 printf_unfiltered ("bss section in exec! Don't know what the heck to do!\n");
303 /* Make a vmap for the BFD "bf", which might be a member of the archive
304 BFD "arch". Return the new vmap. */
311 struct vmap_and_bfd vmap_bfd;
312 struct vmap *vp, **vpp;
314 vp = (PTR) xmalloc (sizeof (*vp));
315 memset (vp, '\0', sizeof (*vp));
318 vp->name = bfd_get_filename (arch ? arch : bf);
319 vp->member = arch ? bfd_get_filename (bf) : "";
321 vmap_bfd.pbfd = arch;
323 bfd_map_over_sections (bf, bfdsec_to_vmap, &vmap_bfd);
325 /* find the end of the list, and append. */
326 for (vpp = &vmap; *vpp; vpp = &(*vpp)->nxt)
333 /* Read or write the exec file.
335 Args are address within exec file, address within gdb address-space,
336 length, and a flag indicating whether to read or write.
340 0: We cannot handle this address and length.
341 > 0: We have handled N bytes starting at this address.
342 (If N == length, we did it all.) We might be able
343 to handle more bytes beyond this length, but no
345 < 0: We cannot handle this address, but if somebody
346 else handles (-N) bytes, we can start from there.
348 The same routine is used to handle both core and exec files;
349 we just tail-call it with more arguments to select between them. */
352 xfer_memory (memaddr, myaddr, len, write, target)
357 struct target_ops *target;
360 struct section_table *p;
361 CORE_ADDR nextsectaddr, memend;
362 boolean (*xfer_fn) PARAMS ((bfd *, sec_ptr, PTR, file_ptr, bfd_size_type));
367 memend = memaddr + len;
368 xfer_fn = write? bfd_set_section_contents: bfd_get_section_contents;
369 nextsectaddr = memend;
371 for (p = target->to_sections; p < target->to_sections_end; p++)
373 if (p->addr <= memaddr)
374 if (p->endaddr >= memend)
376 /* Entire transfer is within this section. */
377 res = xfer_fn (p->bfd, p->the_bfd_section, myaddr, memaddr - p->addr, len);
378 return (res != 0) ? len : 0;
380 else if (p->endaddr <= memaddr)
382 /* This section ends before the transfer starts. */
387 /* This section overlaps the transfer. Just do half. */
388 len = p->endaddr - memaddr;
389 res = xfer_fn (p->bfd, p->the_bfd_section, myaddr, memaddr - p->addr, len);
390 return (res != 0) ? len : 0;
392 else if (p->addr < nextsectaddr)
393 nextsectaddr = p->addr;
396 if (nextsectaddr >= memend)
397 return 0; /* We can't help */
399 return - (nextsectaddr - memaddr); /* Next boundary where we can help */
403 print_section_info (t, abfd)
404 struct target_ops *t;
407 struct section_table *p;
409 /* FIXME-32x64: Need a version of print_address_numeric with field width. */
410 printf_filtered ("\t`%s', ", bfd_get_filename(abfd));
412 printf_filtered ("file type %s.\n", bfd_get_target(abfd));
414 for (p = t->to_sections; p < t->to_sections_end; p++) {
415 printf_filtered ("\t%s",
416 local_hex_string_custom ((unsigned long) p->addr, "08l"));
417 printf_filtered (" - %s",
418 local_hex_string_custom ((unsigned long) p->endaddr, "08l"));
420 printf_filtered (" @ %s",
421 local_hex_string_custom ((unsigned long) p->the_bfd_section->filepos, "08l"));
422 printf_filtered (" is %s", bfd_section_name (p->bfd, p->the_bfd_section));
423 if (p->bfd != abfd) {
424 printf_filtered (" in %s", bfd_get_filename (p->bfd));
426 printf_filtered ("\n");
433 struct target_ops *t;
435 register struct vmap *vp = vmap;
437 print_section_info (t, exec_bfd);
442 printf_unfiltered ("\tMapping info for file `%s'.\n", vp->name);
444 printf_unfiltered ("\t %8.8s %8.8s %8.8s %8.8s %8.8s %s\n",
445 "tstart", "tend", "dstart", "dend", "section", "file(member)");
447 for (; vp; vp = vp->nxt)
448 printf_unfiltered ("\t0x%8.8x 0x%8.8x 0x%8.8x 0x%8.8x %s%s%s%s\n",
454 *vp->member ? "(" : "",
456 *vp->member ? ")" : "");
460 /* Damon's implementation of set_section_command! It is based on the sex member
461 (which is a section pointer from vmap) of vmap.
462 We will not have multiple vmap entries (one for each section), rather transmit
463 text and data base offsets and fix them at the same time. Elimination of sex
464 entry in vmap make this function obsolute, use the one from exec.c.
465 Need further testing!! FIXMEmgo. */
468 set_section_command(args, from_tty)
471 register struct vmap *vp = vmap;
474 unsigned long secaddr;
479 error("Must specify section name and its virtual address");
481 /* Parse out section name */
482 for (secname = args; !isspace(*args); args++)
484 seclen = args - secname;
486 /* Parse out new virtual address */
487 secaddr = parse_and_eval_address(args);
489 for (vp = vmap; vp; vp = vp->nxt) {
491 , bfd_section_name(vp->bfd, vp->sex), seclen)
492 && bfd_section_name(vp->bfd, vp->sex)[seclen] == '\0') {
493 offset = secaddr - vp->tstart;
494 vp->tstart += offset;
501 if (seclen >= sizeof(secprint))
502 seclen = sizeof(secprint) - 1;
503 strncpy(secprint, secname, seclen);
504 secprint[seclen] = '\0';
505 error("Section %s not found", secprint);
509 set_section_command (args, from_tty)
513 struct section_table *p;
516 unsigned long secaddr;
521 error ("Must specify section name and its virtual address");
523 /* Parse out section name */
524 for (secname = args; !isspace(*args); args++) ;
525 seclen = args - secname;
527 /* Parse out new virtual address */
528 secaddr = parse_and_eval_address (args);
530 for (p = exec_ops.to_sections; p < exec_ops.to_sections_end; p++)
531 if (!strncmp (secname, bfd_section_name (exec_bfd, p->the_bfd_section), seclen)
532 && bfd_section_name (exec_bfd, p->the_bfd_section)[seclen] == '\0')
534 offset = secaddr - p->addr;
536 p->endaddr += offset;
538 exec_files_info (&exec_ops);
542 if (seclen >= sizeof (secprint))
543 seclen = sizeof (secprint) - 1;
544 strncpy (secprint, secname, seclen);
545 secprint[seclen] = '\0';
546 error ("Section %s not found", secprint);
551 struct target_ops exec_ops = {
552 "exec", "Local exec file",
553 "Use an executable file as a target.\n\
554 Specify the filename of the executable file.",
555 exec_file_command, exec_close, /* open, close */
556 find_default_attach, 0, 0, 0, /* attach, detach, resume, wait, */
557 0, 0, /* fetch_registers, store_registers, */
558 0, /* prepare_to_store */
559 xfer_memory, exec_files_info,
560 0, 0, /* insert_breakpoint, remove_breakpoint, */
561 0, 0, 0, 0, 0, /* terminal stuff */
562 0, 0, /* kill, load */
564 find_default_create_inferior,
565 0, /* mourn_inferior */
567 0, /* notice_signals */
568 file_stratum, 0, /* next */
569 0, 1, 0, 0, 0, /* all mem, mem, stack, regs, exec */
570 0, 0, /* section pointers */
571 OPS_MAGIC, /* Always the last thing */
578 add_com("file", class_files, file_command,
579 "Use FILE as program to be debugged.\n\
580 It is read for its symbols, for getting the contents of pure memory,\n\
581 and it is the program executed when you use the `run' command.\n\
582 If FILE cannot be found as specified, your execution directory path\n\
583 ($PATH) is searched for a command of that name.\n\
584 No arg means to have no executable file and no symbols.");
586 add_com("exec-file", class_files, exec_file_command,
587 "Use FILE as program for getting contents of pure memory.\n\
588 If FILE cannot be found as specified, your execution directory path\n\
589 is searched for a command of that name.\n\
590 No arg means have no executable file.");
592 add_com("section", class_files, set_section_command,
593 "Change the base address of section SECTION of the exec file to ADDR.\n\
594 This can be used if the exec file does not contain section addresses,\n\
595 (such as in the a.out format), or when the addresses specified in the\n\
596 file itself are wrong. Each section must be changed separately. The\n\
597 ``info files'' command lists all the sections and their addresses.");
599 add_target(&exec_ops);