1 /* BFD library support routines for architectures.
2 Copyright (C) 1990-1991 Free Software Foundation, Inc.
3 Hacked by John Gilmore and Steve Chamberlain of Cygnus Support.
6 This file is part of BFD, the Binary File Descriptor library.
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. */
27 BFD keeps one atom in a BFD describing the
28 architecture of the data attached to the BFD: a pointer to a
29 <<bfd_arch_info_type>>.
31 Pointers to structures can be requested independently of a BFD
32 so that an architecture's information can be interrogated
33 without access to an open BFD.
35 The architecture information is provided by each architecture package.
36 The set of default architectures is selected by the macro
37 <<SELECT_ARCHITECTURES>>. This is normally set up in the
38 <<config/target.mt>> file of your choice. If the name is not
39 defined, then all the architectures supported are included.
41 When BFD starts up, all the architectures are called with an
42 initialize method. It is up to the architecture back end to
43 insert as many items into the list of architectures as it wants to;
44 generally this would be one for each machine and one for the
45 default case (an item with a machine field of 0).
47 BFD's idea of an architecture is implemented in <<archures.c>>.
56 This enum gives the object file's CPU architecture, in a
57 global sense---i.e., what processor family does it belong to?
58 Another field indicates which processor within
59 the family is in use. The machine gives a number which
60 distinguishes different versions of the architecture,
61 containing, for example, 2 and 3 for Intel i960 KA and i960 KB,
62 and 68020 and 68030 for Motorola 68020 and 68030.
64 .enum bfd_architecture
66 . bfd_arch_unknown, {* File arch not known *}
67 . bfd_arch_obscure, {* Arch known, not one of these *}
68 . bfd_arch_m68k, {* Motorola 68xxx *}
69 . bfd_arch_vax, {* DEC Vax *}
70 . bfd_arch_i960, {* Intel 960 *}
71 . {* The order of the following is important.
72 . lower number indicates a machine type that
73 . only accepts a subset of the instructions
74 . available to machines with higher numbers.
75 . The exception is the "ca", which is
76 . incompatible with all other machines except
79 .#define bfd_mach_i960_core 1
80 .#define bfd_mach_i960_ka_sa 2
81 .#define bfd_mach_i960_kb_sb 3
82 .#define bfd_mach_i960_mc 4
83 .#define bfd_mach_i960_xa 5
84 .#define bfd_mach_i960_ca 6
86 . bfd_arch_a29k, {* AMD 29000 *}
87 . bfd_arch_sparc, {* SPARC *}
88 . bfd_arch_mips, {* MIPS Rxxxx *}
89 . bfd_arch_i386, {* Intel 386 *}
90 . bfd_arch_we32k, {* AT&T WE32xxx *}
91 . bfd_arch_tahoe, {* CCI/Harris Tahoe *}
92 . bfd_arch_i860, {* Intel 860 *}
93 . bfd_arch_romp, {* IBM ROMP PC/RT *}
94 . bfd_arch_alliant, {* Alliant *}
95 . bfd_arch_convex, {* Convex *}
96 . bfd_arch_m88k, {* Motorola 88xxx *}
97 . bfd_arch_pyramid, {* Pyramid Technology *}
98 . bfd_arch_h8300, {* Hitachi H8/300 *}
99 .#define bfd_mach_h8300 1
100 .#define bfd_mach_h8300h 2
101 . bfd_arch_rs6000, {* IBM RS/6000 *}
102 . bfd_arch_hppa, {* HP PA RISC *}
103 . bfd_arch_z8k, {* Zilog Z8000 *}
104 .#define bfd_mach_z8001 1
105 .#define bfd_mach_z8002 2
106 . bfd_arch_h8500, {* Hitachi H8/500 *}
107 . bfd_arch_sh, {* Hitachi SH *}
108 . bfd_arch_alpha, {* Dec Alpha *}
125 This structure contains information on architectures for use
129 .typedef struct bfd_arch_info
132 . int bits_per_address;
134 . enum bfd_architecture arch;
137 . CONST char *printable_name;
138 . unsigned int section_align_power;
139 . {* true if this is the default machine for the architecture *}
140 . boolean the_default;
141 . CONST struct bfd_arch_info * (*compatible)
142 . PARAMS ((CONST struct bfd_arch_info *a,
143 . CONST struct bfd_arch_info *b));
145 . boolean (*scan) PARAMS ((CONST struct bfd_arch_info *, CONST char *));
146 . {* How to disassemble an instruction, producing a printable
147 . representation on a specified stdio stream. This isn't
148 . defined for most processors at present, because of the size
149 . of the additional tables it would drag in, and because gdb
150 . wants to use a different interface. *}
151 . unsigned int (*disassemble) PARAMS ((bfd_vma addr, CONST char *data,
154 . struct bfd_arch_info *next;
155 .} bfd_arch_info_type;
158 bfd_arch_info_type *bfd_arch_info_list;
166 CONST char *bfd_printable_name(bfd *abfd);
169 Return a printable string representing the architecture and machine
170 from the pointer to the architecture info structure.
175 DEFUN(bfd_printable_name, (abfd),
178 return abfd->arch_info->printable_name;
188 bfd_arch_info_type *bfd_scan_arch(CONST char *string);
191 Figure out if BFD supports any cpu which could be described with
192 the name @var{string}. Return a pointer to an <<arch_info>>
193 structure if a machine is found, otherwise NULL.
198 DEFUN(bfd_scan_arch,(string),
201 struct bfd_arch_info *ap;
203 /* Look through all the installed architectures */
204 for (ap = bfd_arch_info_list;
205 ap != (bfd_arch_info_type *)NULL;
208 if (ap->scan(ap, string))
211 return (bfd_arch_info_type *)NULL;
218 bfd_arch_get_compatible
221 CONST bfd_arch_info_type *bfd_arch_get_compatible(
226 Determine whether two BFDs'
227 architectures and machine types are compatible. Calculates
228 the lowest common denominator between the two architectures
229 and machine types implied by the BFDs and returns a pointer to
230 an <<arch_info>> structure describing the compatible machine.
233 CONST bfd_arch_info_type *
234 DEFUN(bfd_arch_get_compatible,(abfd, bbfd),
239 return abfd->arch_info->compatible(abfd->arch_info,bbfd->arch_info);
245 bfd_default_arch_struct
248 The <<bfd_default_arch_struct>> is an item of
249 <<bfd_arch_info_type>> which has been initialized to a fairly
250 generic state. A BFD starts life by pointing to this
251 structure, until the correct back end has determined the real
252 architecture of the file.
254 .extern bfd_arch_info_type bfd_default_arch_struct;
258 bfd_arch_info_type bfd_default_arch_struct =
260 32,32,8,bfd_arch_unknown,0,"unknown","unknown",2,true,
261 bfd_default_compatible,
271 void bfd_set_arch_info(bfd *abfd, bfd_arch_info_type *arg);
274 Set the architecture info of @var{abfd} to @var{arg}.
277 void DEFUN(bfd_set_arch_info,(abfd, arg),
279 bfd_arch_info_type *arg)
281 abfd->arch_info = arg;
286 bfd_default_set_arch_mach
289 boolean bfd_default_set_arch_mach(bfd *abfd,
290 enum bfd_architecture arch,
294 Set the architecture and machine type in BFD @var{abfd}
295 to @var{arch} and @var{mach}. Find the correct
296 pointer to a structure and insert it into the <<arch_info>>
300 boolean DEFUN(bfd_default_set_arch_mach,(abfd, arch, mach),
302 enum bfd_architecture arch AND
305 static struct bfd_arch_info *old_ptr = &bfd_default_arch_struct;
306 boolean found = false;
307 /* run through the table to find the one we want, we keep a little
308 cache to speed things up */
309 if (old_ptr == 0 || arch != old_ptr->arch || mach != old_ptr->mach) {
310 bfd_arch_info_type *ptr;
311 old_ptr = (bfd_arch_info_type *)NULL;
312 for (ptr = bfd_arch_info_list;
313 ptr != (bfd_arch_info_type *)NULL;
315 if (ptr->arch == arch &&
316 ((ptr->mach == mach) || (ptr->the_default && mach == 0))) {
323 /*looked for it and it wasn't there, so put in the default */
324 old_ptr = &bfd_default_arch_struct;
325 bfd_error = bad_value;
329 /* it was in the cache */
333 abfd->arch_info = old_ptr;
344 enum bfd_architecture bfd_get_arch(bfd *abfd);
347 Return the enumerated type which describes the BFD @var{abfd}'s
352 enum bfd_architecture DEFUN(bfd_get_arch, (abfd), bfd *abfd)
354 return abfd->arch_info->arch;
362 unsigned long bfd_get_mach(bfd *abfd);
365 Return the long type which describes the BFD @var{abfd}'s
370 DEFUN(bfd_get_mach, (abfd), bfd *abfd)
372 return abfd->arch_info->mach;
377 bfd_arch_bits_per_byte
380 unsigned int bfd_arch_bits_per_byte(bfd *abfd);
383 Return the number of bits in one of the BFD @var{abfd}'s
384 architecture's bytes.
388 unsigned int DEFUN(bfd_arch_bits_per_byte, (abfd), bfd *abfd)
390 return abfd->arch_info->bits_per_byte;
395 bfd_arch_bits_per_address
398 unsigned int bfd_arch_bits_per_address(bfd *abfd);
401 Return the number of bits in one of the BFD @var{abfd}'s
402 architecture's addresses.
405 unsigned int DEFUN(bfd_arch_bits_per_address, (abfd), bfd *abfd)
407 return abfd->arch_info->bits_per_address;
411 extern void bfd_a29k_arch PARAMS ((void));
412 extern void bfd_alpha_arch PARAMS ((void));
413 extern void bfd_h8300_arch PARAMS ((void));
414 extern void bfd_h8500_arch PARAMS ((void));
415 extern void bfd_hppa_arch PARAMS ((void));
416 extern void bfd_i386_arch PARAMS ((void));
417 extern void bfd_i960_arch PARAMS ((void));
418 extern void bfd_m68k_arch PARAMS ((void));
419 extern void bfd_m88k_arch PARAMS ((void));
420 extern void bfd_mips_arch PARAMS ((void));
421 extern void bfd_rs6000_arch PARAMS ((void));
422 extern void bfd_sh_arch PARAMS ((void));
423 extern void bfd_sparc_arch PARAMS ((void));
424 extern void bfd_vax_arch PARAMS ((void));
425 extern void bfd_we32k_arch PARAMS ((void));
426 extern void bfd_z8k_arch PARAMS ((void));
428 static void (*archures_init_table[]) PARAMS ((void)) =
430 #ifdef SELECT_ARCHITECTURES
431 SELECT_ARCHITECTURES,
460 void bfd_arch_init(void);
463 Initialize the architecture dispatch table by
464 calling all installed architecture packages and getting them
469 DEFUN_VOID(bfd_arch_init)
471 void (**ptable) PARAMS ((void));
472 for (ptable = archures_init_table;
486 void bfd_arch_linkin(bfd_arch_info_type *ptr);
489 Link the architecture info structure @var{ptr} into the list.
492 void DEFUN(bfd_arch_linkin,(ptr),
493 bfd_arch_info_type *ptr)
495 ptr->next = bfd_arch_info_list;
496 bfd_arch_info_list = ptr;
502 bfd_default_compatible
505 CONST bfd_arch_info_type *bfd_default_compatible
506 (CONST bfd_arch_info_type *a,
507 CONST bfd_arch_info_type *b);
510 The default function for testing for compatibility.
513 CONST bfd_arch_info_type *
514 DEFUN(bfd_default_compatible,(a,b),
515 CONST bfd_arch_info_type *a AND
516 CONST bfd_arch_info_type *b)
518 if(a->arch != b->arch) return NULL;
520 if (a->mach > b->mach) {
523 if (b->mach > a->mach) {
535 boolean bfd_default_scan(CONST struct bfd_arch_info *info, CONST char *string);
538 The default function for working out whether this is an
539 architecture hit and a machine hit.
543 DEFUN(bfd_default_scan,(info, string),
544 CONST struct bfd_arch_info *info AND
549 unsigned long number;
550 enum bfd_architecture arch;
551 /* First test for an exact match */
552 if (strcmp(string, info->printable_name) == 0) return true;
554 /* See how much of the supplied string matches with the
555 architecture, eg the string m68k:68020 would match the 68k entry
556 up to the :, then we get left with the machine number */
558 for (ptr_src = string,
559 ptr_tst = info->arch_name;
560 *ptr_src && *ptr_tst;
564 if (*ptr_src != *ptr_tst) break;
567 /* Chewed up as much of the architecture as will match, skip any
569 if (*ptr_src == ':') ptr_src++;
572 /* nothing more, then only keep this one if it is the default
573 machine for this architecture */
574 return info->the_default;
577 while (isdigit(*ptr_src)) {
578 number = number * 10 + *ptr_src - '0';
585 arch = bfd_arch_h8300;
589 arch = bfd_arch_h8500;
599 arch = bfd_arch_m68k;
605 arch = bfd_arch_i386;
608 arch = bfd_arch_a29k;
616 arch = bfd_arch_we32k;
621 arch = bfd_arch_i860;
625 arch = bfd_arch_i960;
632 arch = bfd_arch_mips;
636 arch = bfd_arch_rs6000;
642 if (arch != info->arch)
645 if (number != info->mach)
657 bfd_arch_info_type * bfd_get_arch_info(bfd *abfd);
660 Return the architecture info struct in @var{abfd}.
664 DEFUN(bfd_get_arch_info,(abfd),
667 return abfd->arch_info;
676 bfd_arch_info_type *bfd_lookup_arch
677 (enum bfd_architecture
682 Look for the architecure info structure which matches the
683 arguments @var{arch} and @var{machine}. A machine of 0 matches the
684 machine/architecture structure which marks itself as the
689 DEFUN(bfd_lookup_arch,(arch, machine),
690 enum bfd_architecture arch AND
693 bfd_arch_info_type *ap;
695 for (ap = bfd_arch_info_list;
696 ap != (bfd_arch_info_type *)NULL;
698 if (ap->arch == arch &&
699 ((ap->mach == machine)
700 || (ap->the_default && machine == 0))) {
704 return (bfd_arch_info_type *)NULL;
710 bfd_printable_arch_mach
713 CONST char *bfd_printable_arch_mach
714 (enum bfd_architecture arch, unsigned long machine);
717 Return a printable string representing the architecture and
720 This routine is depreciated.
724 DEFUN(bfd_printable_arch_mach,(arch, machine),
725 enum bfd_architecture arch AND
726 unsigned long machine)
728 bfd_arch_info_type *ap = bfd_lookup_arch(arch, machine);
729 if(ap) return ap->printable_name;