1 /* Execute AIXcoff files, for GDB.
2 Copyright 1988, 1989, 1991, 1992 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>
42 #include "xcoffsolib.h"
44 /* Prototypes for local functions */
47 file_command
PARAMS ((char *, int));
50 exec_close
PARAMS ((int));
53 map_vmap
PARAMS ((bfd
*, bfd
*));
55 struct section_table
*exec_sections
, *exec_sections_end
;
57 /* Whether to open exec and core files read-only or read-write. */
61 extern int info_verbose
;
63 bfd
*exec_bfd
; /* needed by core.c */
65 extern char *getenv();
66 extern void add_syms_addr_command ();
67 extern void symbol_file_command ();
68 static void exec_files_info();
70 struct vmap
*vmap
; /* current vmap */
72 extern struct target_ops exec_ops
;
74 /* exec_close - done with exec file, clean up all resources. */
79 register struct vmap
*vp
, *nxt
;
81 int need_symtab_cleanup
= 0;
83 for (nxt
= vmap
; vp
= nxt
; )
87 /* if there is an objfile associated with this bfd,
88 free_objfile() will do proper cleanup of objfile *and* bfd. */
92 free_objfile (vp
->objfile
);
93 need_symtab_cleanup
= 1;
98 /* FIXME: This routine is #if 0'd in symfile.c. What should we
99 be doing here? Should we just free everything in
100 vp->objfile->symtabs? Should free_objfile do that? */
101 free_named_symtabs(vp
->name
);
107 /* exec_bfd was already closed (the exec file has a vmap entry). */
110 if (exec_ops
.to_sections
) {
111 free (exec_ops
.to_sections
);
112 exec_ops
.to_sections
= NULL
;
113 exec_ops
.to_sections_end
= NULL
;
116 if (need_symtab_cleanup
)
117 clear_symtab_users ();
121 * exec_file_command - handle the "exec" command, &c.
124 exec_file_command (filename
, from_tty
)
128 target_preopen(from_tty
);
130 /* Remove any previous exec file. */
131 unpush_target(&exec_ops
);
133 /* Now open and digest the file the user requested, if any. */
137 char *scratch_pathname
;
140 filename
= tilde_expand(filename
);
141 make_cleanup (free
, filename
);
143 scratch_chan
= openp(getenv("PATH"), 1, filename
,
144 write_files
? O_RDWR
: O_RDONLY
, 0,
146 if (scratch_chan
< 0)
147 perror_with_name(filename
);
149 exec_bfd
= bfd_fdopenr(scratch_pathname
, gnutarget
, scratch_chan
);
151 error("Could not open `%s' as an executable file: %s",
152 scratch_pathname
, bfd_errmsg(bfd_error
));
154 /* make sure we have an object file */
156 if (!bfd_check_format(exec_bfd
, bfd_object
))
157 error("\"%s\": not in executable format: %s.", scratch_pathname
,
158 bfd_errmsg(bfd_error
));
160 /* setup initial vmap */
162 map_vmap (exec_bfd
, 0);
164 error("Can't find the file sections in `%s': %s", exec_bfd
->filename
,
165 bfd_errmsg(bfd_error
));
167 if (build_section_table (exec_bfd
, &exec_ops
.to_sections
,
168 &exec_ops
.to_sections_end
))
169 error ("Can't find the file sections in `%s': %s", exec_bfd
->filename
,
170 bfd_errmsg (bfd_error
));
172 /* make sure core, if present, matches */
175 push_target(&exec_ops
);
177 /* Tell display code(if any) about the changed file name. */
179 if (exec_file_display_hook
)
180 (*exec_file_display_hook
)(filename
);
184 exec_close(0); /* just in case */
186 printf_unfiltered("No exec file now.\n");
190 /* Set both the exec file and the symbol file, in one command. What a
191 * novelty. Why did GDB go through four major releases before this
195 file_command(arg
, from_tty
)
198 exec_file_command(arg
, from_tty
);
199 symbol_file_command(arg
, from_tty
);
202 /* Locate all mappable sections of a BFD file.
203 table_pp_char is a char * to get it through bfd_map_over_sections;
204 we cast it back to its proper type. */
207 add_to_section_table (abfd
, asect
, table_pp_char
)
212 struct section_table
**table_pp
= (struct section_table
**)table_pp_char
;
215 aflag
= bfd_get_section_flags (abfd
, asect
);
216 /* FIXME, we need to handle BSS segment here...it alloc's but doesn't load */
217 if (!(aflag
& SEC_LOAD
))
219 if (0 == bfd_section_size (abfd
, asect
))
221 (*table_pp
)->bfd
= abfd
;
222 (*table_pp
)->sec_ptr
= asect
;
223 (*table_pp
)->addr
= bfd_section_vma (abfd
, asect
);
224 (*table_pp
)->endaddr
= (*table_pp
)->addr
+ bfd_section_size (abfd
, asect
);
229 build_section_table (some_bfd
, start
, end
)
231 struct section_table
**start
, **end
;
235 count
= bfd_count_sections (some_bfd
);
237 fatal ("aborting"); /* return 1? */
240 *start
= (struct section_table
*) xmalloc (count
* sizeof (**start
));
242 bfd_map_over_sections (some_bfd
, add_to_section_table
, (char *)end
);
243 if (*end
> *start
+ count
)
245 /* We could realloc the table, but it probably loses for most files. */
250 bfdsec_to_vmap(bf
, sect
, arg3
)
255 struct vmap_and_bfd
*vmap_bfd
= (struct vmap_and_bfd
*)arg3
;
256 register struct vmap
*vp
, **vpp
;
257 register struct symtab
*syms
;
258 bfd
*arch
= vmap_bfd
->pbfd
;
259 vp
= vmap_bfd
->pvmap
;
261 if ((bfd_get_section_flags(bf
, sect
) & SEC_LOAD
) == 0)
264 if (STREQ(bfd_section_name(bf
, sect
), ".text"))
267 vp
->tend
= vp
->tstart
+ bfd_section_size(bf
, sect
);
269 /* When it comes to this adjustment value, in contrast to our previous
270 belief shared objects should behave the same as the main load segment.
271 This is the offset from the beginning of text section to the first
274 vp
->tadj
= sect
->filepos
- bfd_section_vma(bf
, sect
);
276 else if (STREQ(bfd_section_name(bf
, sect
), ".data"))
279 vp
->dend
= vp
->dstart
+ bfd_section_size(bf
, sect
);
281 else if (STREQ(bfd_section_name(bf
, sect
), ".bss")) /* FIXMEmgo */
282 printf_unfiltered ("bss section in exec! Don't know what the heck to do!\n");
285 /* Make a vmap for the BFD "bf", which might be a member of the archive
286 BFD "arch". Return the new vmap. */
293 struct vmap_and_bfd vmap_bfd
;
294 struct vmap
*vp
, **vpp
;
297 vp
= (void*) xmalloc (sizeof (*vp
));
298 memset (vp
, '\0', sizeof (*vp
));
301 vp
->name
= bfd_get_filename(arch
? arch
: bf
);
302 vp
->member
= arch
? bfd_get_filename(bf
) : "";
304 vmap_bfd
.pbfd
= arch
;
306 bfd_map_over_sections (bf
, bfdsec_to_vmap
, &vmap_bfd
);
308 /* find the end of the list, and append. */
309 for (vpp
= &vmap
; *vpp
; vpp
= &(*vpp
)->nxt
)
316 /* Read or write the exec file.
318 Args are address within exec file, address within gdb address-space,
319 length, and a flag indicating whether to read or write.
323 0: We cannot handle this address and length.
324 > 0: We have handled N bytes starting at this address.
325 (If N == length, we did it all.) We might be able
326 to handle more bytes beyond this length, but no
328 < 0: We cannot handle this address, but if somebody
329 else handles (-N) bytes, we can start from there.
331 The same routine is used to handle both core and exec files;
332 we just tail-call it with more arguments to select between them. */
335 xfer_memory (memaddr
, myaddr
, len
, write
, target
)
340 struct target_ops
*target
;
343 struct section_table
*p
;
344 CORE_ADDR nextsectaddr
, memend
;
345 boolean (*xfer_fn
) PARAMS ((bfd
*, sec_ptr
, PTR
, file_ptr
, bfd_size_type
));
350 memend
= memaddr
+ len
;
351 xfer_fn
= write
? bfd_set_section_contents
: bfd_get_section_contents
;
352 nextsectaddr
= memend
;
354 for (p
= target
->to_sections
; p
< target
->to_sections_end
; p
++)
356 if (p
->addr
<= memaddr
)
357 if (p
->endaddr
>= memend
)
359 /* Entire transfer is within this section. */
360 res
= xfer_fn (p
->bfd
, p
->sec_ptr
, myaddr
, memaddr
- p
->addr
, len
);
361 return (res
!= false)? len
: 0;
363 else if (p
->endaddr
<= memaddr
)
365 /* This section ends before the transfer starts. */
370 /* This section overlaps the transfer. Just do half. */
371 len
= p
->endaddr
- memaddr
;
372 res
= xfer_fn (p
->bfd
, p
->sec_ptr
, myaddr
, memaddr
- p
->addr
, len
);
373 return (res
!= false)? len
: 0;
375 else if (p
->addr
< nextsectaddr
)
376 nextsectaddr
= p
->addr
;
379 if (nextsectaddr
>= memend
)
380 return 0; /* We can't help */
382 return - (nextsectaddr
- memaddr
); /* Next boundary where we can help */
386 print_section_info (t
, abfd
)
387 struct target_ops
*t
;
390 struct section_table
*p
;
392 /* FIXME-32x64: Need a version of print_address_numeric with field width. */
393 printf_filtered ("\t`%s', ", bfd_get_filename(abfd
));
395 printf_filtered ("file type %s.\n", bfd_get_target(abfd
));
397 for (p
= t
->to_sections
; p
< t
->to_sections_end
; p
++) {
398 printf_filtered ("\t%s",
399 local_hex_string_custom ((unsigned long) p
->addr
, "08l"));
400 printf_filtered (" - %s",
401 local_hex_string_custom ((unsigned long) p
->endaddr
, "08l"));
403 printf_filtered (" @ %s",
404 local_hex_string_custom ((unsigned long) p
->sec_ptr
->filepos
, "08l"));
405 printf_filtered (" is %s", bfd_section_name (p
->bfd
, p
->sec_ptr
));
406 if (p
->bfd
!= abfd
) {
407 printf_filtered (" in %s", bfd_get_filename (p
->bfd
));
409 printf_filtered ("\n");
416 struct target_ops
*t
;
418 register struct vmap
*vp
= vmap
;
420 print_section_info (t
, exec_bfd
);
425 printf_unfiltered("\tMapping info for file `%s'.\n", vp
->name
);
427 printf_unfiltered("\t %8.8s %8.8s %8.8s %8.8s %8.8s %s\n",
428 "tstart", "tend", "dstart", "dend", "section", "file(member)");
430 for (; vp
; vp
= vp
->nxt
)
431 printf_unfiltered("\t0x%8.8x 0x%8.8x 0x%8.8x 0x%8.8x %s%s%s%s\n",
437 *vp
->member
? "(" : "",
439 *vp
->member
? ")" : "");
443 /* Damon's implementation of set_section_command! It is based on the sex member
444 (which is a section pointer from vmap) of vmap.
445 We will not have multiple vmap entries (one for each section), rather transmit
446 text and data base offsets and fix them at the same time. Elimination of sex
447 entry in vmap make this function obsolute, use the one from exec.c.
448 Need further testing!! FIXMEmgo. */
451 set_section_command(args
, from_tty
)
454 register struct vmap
*vp
= vmap
;
457 unsigned long secaddr
;
462 error("Must specify section name and its virtual address");
464 /* Parse out section name */
465 for (secname
= args
; !isspace(*args
); args
++)
467 seclen
= args
- secname
;
469 /* Parse out new virtual address */
470 secaddr
= parse_and_eval_address(args
);
472 for (vp
= vmap
; vp
; vp
= vp
->nxt
) {
474 , bfd_section_name(vp
->bfd
, vp
->sex
), seclen
)
475 && bfd_section_name(vp
->bfd
, vp
->sex
)[seclen
] == '\0') {
476 offset
= secaddr
- vp
->tstart
;
477 vp
->tstart
+= offset
;
484 if (seclen
>= sizeof(secprint
))
485 seclen
= sizeof(secprint
) - 1;
486 strncpy(secprint
, secname
, seclen
);
487 secprint
[seclen
] = '\0';
488 error("Section %s not found", secprint
);
492 set_section_command (args
, from_tty
)
496 struct section_table
*p
;
499 unsigned long secaddr
;
504 error ("Must specify section name and its virtual address");
506 /* Parse out section name */
507 for (secname
= args
; !isspace(*args
); args
++) ;
508 seclen
= args
- secname
;
510 /* Parse out new virtual address */
511 secaddr
= parse_and_eval_address (args
);
513 for (p
= exec_ops
.to_sections
; p
< exec_ops
.to_sections_end
; p
++) {
514 if (!strncmp (secname
, bfd_section_name (exec_bfd
, p
->sec_ptr
), seclen
)
515 && bfd_section_name (exec_bfd
, p
->sec_ptr
)[seclen
] == '\0') {
516 offset
= secaddr
- p
->addr
;
518 p
->endaddr
+= offset
;
520 exec_files_info(&exec_ops
);
524 if (seclen
>= sizeof (secprint
))
525 seclen
= sizeof (secprint
) - 1;
526 strncpy (secprint
, secname
, seclen
);
527 secprint
[seclen
] = '\0';
528 error ("Section %s not found", secprint
);
533 struct target_ops exec_ops
= {
534 "exec", "Local exec file",
535 "Use an executable file as a target.\n\
536 Specify the filename of the executable file.",
537 exec_file_command
, exec_close
, /* open, close */
538 find_default_attach
, 0, 0, 0, /* attach, detach, resume, wait, */
539 0, 0, /* fetch_registers, store_registers, */
540 0, /* prepare_to_store */
541 xfer_memory
, exec_files_info
,
542 0, 0, /* insert_breakpoint, remove_breakpoint, */
543 0, 0, 0, 0, 0, /* terminal stuff */
544 0, 0, /* kill, load */
546 find_default_create_inferior
,
547 0, /* mourn_inferior */
549 0, /* notice_signals */
550 file_stratum
, 0, /* next */
551 0, 1, 0, 0, 0, /* all mem, mem, stack, regs, exec */
552 0, 0, /* section pointers */
553 OPS_MAGIC
, /* Always the last thing */
560 add_com("file", class_files
, file_command
,
561 "Use FILE as program to be debugged.\n\
562 It is read for its symbols, for getting the contents of pure memory,\n\
563 and it is the program executed when you use the `run' command.\n\
564 If FILE cannot be found as specified, your execution directory path\n\
565 ($PATH) is searched for a command of that name.\n\
566 No arg means to have no executable file and no symbols.");
568 add_com("exec-file", class_files
, exec_file_command
,
569 "Use FILE as program for getting contents of pure memory.\n\
570 If FILE cannot be found as specified, your execution directory path\n\
571 is searched for a command of that name.\n\
572 No arg means have no executable file.");
574 add_com("section", class_files
, set_section_command
,
575 "Change the base address of section SECTION of the exec file to ADDR.\n\
576 This can be used if the exec file does not contain section addresses,\n\
577 (such as in the a.out format), or when the addresses specified in the\n\
578 file itself are wrong. Each section must be changed separately. The\n\
579 ``info files'' command lists all the sections and their addresses.");
581 add_target(&exec_ops
);