1 /* ARC target-dependent stuff. Extension structure access functions
2 Copyright (C) 1995-2019 Free Software Foundation, Inc.
4 This file is part of libopcodes.
6 This library is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3, or (at your option)
11 It is distributed in the hope that it will be useful, but WITHOUT
12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
13 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
14 License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19 MA 02110-1301, USA. */
28 #include "libiberty.h"
30 /* This module provides support for extensions to the ARC processor
34 /* Local constants. */
36 #define FIRST_EXTENSION_CORE_REGISTER 32
37 #define LAST_EXTENSION_CORE_REGISTER 59
38 #define FIRST_EXTENSION_CONDITION_CODE 0x10
39 #define LAST_EXTENSION_CONDITION_CODE 0x1f
41 #define NUM_EXT_CORE \
42 (LAST_EXTENSION_CORE_REGISTER - FIRST_EXTENSION_CORE_REGISTER + 1)
43 #define NUM_EXT_COND \
44 (LAST_EXTENSION_CONDITION_CODE - FIRST_EXTENSION_CONDITION_CODE + 1)
45 #define INST_HASH_BITS 6
46 #define INST_HASH_SIZE (1 << INST_HASH_BITS)
47 #define INST_HASH_MASK (INST_HASH_SIZE - 1)
52 /* These types define the information stored in the table. */
58 struct ExtAuxRegister * next;
61 struct ExtCoreRegister
70 struct ExtAuxRegister* auxRegisters;
71 struct ExtInstruction* instructions[INST_HASH_SIZE];
72 struct ExtCoreRegister coreRegisters[NUM_EXT_CORE];
73 char * condCodes[NUM_EXT_COND];
79 /* Extension table. */
80 static struct arcExtMap arc_extension_map;
85 /* A hash function used to map instructions into the table. */
86 #define INST_HASH(MAJOR, MINOR) ((((MAJOR) << 3) ^ (MINOR)) & INST_HASH_MASK)
89 /* Local functions. */
92 create_map (unsigned char *block,
95 unsigned char *p = block;
97 while (p && p < (block + length))
99 /* p[0] == length of record
100 p[1] == type of record
103 p[3] = minor opcode (if opcode == 3)
106 For core regs and condition codes:
112 (value is p[2]<<24|p[3]<<16|p[4]<<8|p[5]). */
114 /* The sequence of records is temrinated by an "empty"
121 case EXT_INSTRUCTION:
123 struct ExtInstruction *insn = XNEW (struct ExtInstruction);
126 struct ExtInstruction **bucket =
127 &arc_extension_map.instructions[INST_HASH (major, minor)];
129 insn->name = xstrdup ((char *) (p + 5));
133 insn->next = *bucket;
141 case EXT_CORE_REGISTER:
143 unsigned char number = p[2];
144 char* name = (char *) (p + 3);
147 coreRegisters[number - FIRST_EXTENSION_CORE_REGISTER].number
150 coreRegisters[number - FIRST_EXTENSION_CORE_REGISTER].rw
153 coreRegisters[number - FIRST_EXTENSION_CORE_REGISTER].name
158 case EXT_LONG_CORE_REGISTER:
160 unsigned char number = p[2];
161 char* name = (char *) (p + 7);
162 enum ExtReadWrite rw = p[6];
165 coreRegisters[number - FIRST_EXTENSION_CORE_REGISTER].number
168 coreRegisters[number - FIRST_EXTENSION_CORE_REGISTER].rw
171 coreRegisters[number - FIRST_EXTENSION_CORE_REGISTER].name
178 char *cc_name = xstrdup ((char *) (p + 3));
181 condCodes[p[2] - FIRST_EXTENSION_CONDITION_CODE]
186 case EXT_AUX_REGISTER:
188 /* Trickier -- need to store linked list of these. */
189 struct ExtAuxRegister *newAuxRegister
190 = XNEW (struct ExtAuxRegister);
191 char *aux_name = xstrdup ((char *) (p + 6));
193 newAuxRegister->name = aux_name;
194 newAuxRegister->address = (p[2] << 24) | (p[3] << 16)
195 | (p[4] << 8) | p[5];
196 newAuxRegister->next = arc_extension_map.auxRegisters;
197 arc_extension_map.auxRegisters = newAuxRegister;
205 p += p[0]; /* Move on to next record. */
210 /* Free memory that has been allocated for the extensions. */
215 struct ExtAuxRegister *r;
218 /* Free auxiliary registers. */
219 r = arc_extension_map.auxRegisters;
222 /* N.B. after r has been freed, r->next is invalid! */
223 struct ExtAuxRegister* next = r->next;
230 /* Free instructions. */
231 for (i = 0; i < INST_HASH_SIZE; i++)
233 struct ExtInstruction *insn = arc_extension_map.instructions[i];
237 /* N.B. after insn has been freed, insn->next is invalid! */
238 struct ExtInstruction *next = insn->next;
246 /* Free core registers. */
247 for (i = 0; i < NUM_EXT_CORE; i++)
249 if (arc_extension_map.coreRegisters[i].name)
250 free (arc_extension_map.coreRegisters[i].name);
253 /* Free condition codes. */
254 for (i = 0; i < NUM_EXT_COND; i++)
256 if (arc_extension_map.condCodes[i])
257 free (arc_extension_map.condCodes[i]);
260 memset (&arc_extension_map, 0, sizeof (arc_extension_map));
265 ExtReadWrite_image (enum ExtReadWrite val)
269 case REG_INVALID : return "INVALID";
270 case REG_READ : return "RO";
271 case REG_WRITE : return "WO";
272 case REG_READWRITE: return "R/W";
273 default : return "???";
278 /* Externally visible functions. */
280 /* Get the name of an extension instruction. */
282 const extInstruction_t *
283 arcExtMap_insn (int opcode, unsigned long long insn)
285 /* Here the following tasks need to be done. First of all, the
286 opcode stored in the Extension Map is the real opcode. However,
287 the subopcode stored in the instruction to be disassembled is
288 mangled. We pass (in minor opcode), the instruction word. Here
289 we will un-mangle it and get the real subopcode which we can look
290 for in the Extension Map. This function is used both for the
291 ARCTangent and the ARCompact, so we would also need some sort of
292 a way to distinguish between the two architectures. This is
293 because the ARCTangent does not do any of this mangling so we
294 have no issues there. */
296 /* If P[22:23] is 0 or 2 then un-mangle using iiiiiI. If it is 1
297 then use iiiiIi. Now, if P is 3 then check M[5:5] and if it is 0
298 then un-mangle using iiiiiI else iiiiii. */
301 extInstruction_t *temp;
303 /* 16-bit instructions. */
304 if (0x08 <= opcode && opcode <= 0x0b)
306 unsigned char b, c, i;
308 b = (insn & 0x0700) >> 8;
309 c = (insn & 0x00e0) >> 5;
315 minor = (c == 0x07) ? b : c;
317 /* 32-bit instructions. */
320 unsigned char I, A, B;
322 I = (insn & 0x003f0000) >> 16;
323 A = (insn & 0x0000003f);
324 B = ((insn & 0x07000000) >> 24) | ((insn & 0x00007000) >> 9);
339 minor = (I >> 1) | ((I & 0x1) << 5);
342 minor = (I >> 1) | (I & 0x1) | ((I & 0x2) << 4);
357 temp = arc_extension_map.instructions[INST_HASH (opcode, minor)];
360 if ((temp->major == opcode) && (temp->minor == minor))
370 /* Get the name of an extension core register. */
373 arcExtMap_coreRegName (int regnum)
375 if (regnum < FIRST_EXTENSION_CORE_REGISTER
376 || regnum > LAST_EXTENSION_CORE_REGISTER)
378 return arc_extension_map.
379 coreRegisters[regnum - FIRST_EXTENSION_CORE_REGISTER].name;
382 /* Get the access mode of an extension core register. */
385 arcExtMap_coreReadWrite (int regnum)
387 if (regnum < FIRST_EXTENSION_CORE_REGISTER
388 || regnum > LAST_EXTENSION_CORE_REGISTER)
390 return arc_extension_map.
391 coreRegisters[regnum - FIRST_EXTENSION_CORE_REGISTER].rw;
394 /* Get the name of an extension condition code. */
397 arcExtMap_condCodeName (int code)
399 if (code < FIRST_EXTENSION_CONDITION_CODE
400 || code > LAST_EXTENSION_CONDITION_CODE)
402 return arc_extension_map.
403 condCodes[code - FIRST_EXTENSION_CONDITION_CODE];
406 /* Get the name of an extension auxiliary register. */
409 arcExtMap_auxRegName (long address)
411 /* Walk the list of auxiliary register names and find the name. */
412 struct ExtAuxRegister *r;
414 for (r = arc_extension_map.auxRegisters; r; r = r->next)
416 if (r->address == address)
417 return (const char *)r->name;
422 /* Load extensions described in .arcextmap and
423 .gnu.linkonce.arcextmap.* ELF section. */
426 build_ARC_extmap (bfd *text_bfd)
430 /* The map is built each time gdb loads an executable file - so free
431 any existing map, as the map defined by the new file may differ
435 for (sect = text_bfd->sections; sect != NULL; sect = sect->next)
436 if (!strncmp (sect->name,
437 ".gnu.linkonce.arcextmap.",
438 sizeof (".gnu.linkonce.arcextmap.") - 1)
439 || !strcmp (sect->name,".arcextmap"))
441 bfd_size_type count = bfd_get_section_size (sect);
442 unsigned char* buffer = xmalloc (count);
446 if (bfd_get_section_contents (text_bfd, sect, buffer, 0, count))
447 create_map (buffer, count);
453 /* Debug function used to dump the ARC information fount in arcextmap
457 dump_ARC_extmap (void)
459 struct ExtAuxRegister *r;
462 r = arc_extension_map.auxRegisters;
466 printf ("AUX : %s %ld\n", r->name, r->address);
470 for (i = 0; i < INST_HASH_SIZE; i++)
472 struct ExtInstruction *insn;
474 for (insn = arc_extension_map.instructions[i];
475 insn != NULL; insn = insn->next)
477 printf ("INST: 0x%02x 0x%02x ", insn->major, insn->minor);
478 switch (insn->flags & ARC_SYNTAX_MASK)
481 printf ("SYNTAX_2OP");
484 printf ("SYNTAX_3OP");
487 printf ("SYNTAX_1OP");
490 printf ("SYNTAX_NOP");
493 printf ("SYNTAX_UNK");
497 if (insn->flags & 0x10)
498 printf ("|MODIFIER");
500 printf (" %s\n", insn->name);
504 for (i = 0; i < NUM_EXT_CORE; i++)
506 struct ExtCoreRegister reg = arc_extension_map.coreRegisters[i];
509 printf ("CORE: 0x%04x %s %s\n", reg.number,
510 ExtReadWrite_image (reg.rw),
514 for (i = 0; i < NUM_EXT_COND; i++)
515 if (arc_extension_map.condCodes[i])
516 printf ("COND: %s\n", arc_extension_map.condCodes[i]);
519 /* For a given extension instruction generate the equivalent arc
523 arcExtMap_genOpcode (const extInstruction_t *einsn,
527 struct arc_opcode *q, *arc_ext_opcodes = NULL;
528 const unsigned char *lflags_f;
529 const unsigned char *lflags_ccf;
532 /* Check for the class to see how many instructions we generate. */
533 switch (einsn->flags & ARC_SYNTAX_MASK)
536 count = (einsn->modsyn & ARC_OP1_MUST_BE_IMM) ? 10 : 20;
539 count = (einsn->flags & 0x10) ? 7 : 6;
552 /* Allocate memory. */
553 arc_ext_opcodes = (struct arc_opcode *)
554 xmalloc ((count + 1) * sizeof (*arc_ext_opcodes));
556 if (arc_ext_opcodes == NULL)
558 *errmsg = "Virtual memory exhausted";
562 /* Generate the patterns. */
567 lflags_f = flags_none;
568 lflags_ccf = flags_none;
573 lflags_ccf = flags_ccf;
576 if (einsn->suffix & ARC_SUFFIX_COND)
577 lflags_ccf = flags_cc;
578 if (einsn->suffix & ARC_SUFFIX_FLAG)
581 lflags_ccf = flags_f;
583 if (einsn->suffix & (ARC_SUFFIX_FLAG | ARC_SUFFIX_COND))
584 lflags_ccf = flags_ccf;
586 if (einsn->flags & ARC_SYNTAX_2OP
587 && !(einsn->flags & 0x10))
589 /* Regular 2OP instruction. */
590 if (einsn->suffix & ARC_SUFFIX_COND)
591 *errmsg = "Suffix SUFFIX_COND ignored";
593 INSERT_XOP (q, einsn->name,
594 INSN2OP_BC (einsn->major, einsn->minor), MINSN2OP_BC,
595 arc_target, arg_32bit_rbrc, lflags_f);
597 INSERT_XOP (q, einsn->name,
598 INSN2OP_0C (einsn->major, einsn->minor), MINSN2OP_0C,
599 arc_target, arg_32bit_zarc, lflags_f);
601 INSERT_XOP (q, einsn->name,
602 INSN2OP_BU (einsn->major, einsn->minor), MINSN2OP_BU,
603 arc_target, arg_32bit_rbu6, lflags_f);
605 INSERT_XOP (q, einsn->name,
606 INSN2OP_0U (einsn->major, einsn->minor), MINSN2OP_0U,
607 arc_target, arg_32bit_zau6, lflags_f);
609 INSERT_XOP (q, einsn->name,
610 INSN2OP_BL (einsn->major, einsn->minor), MINSN2OP_BL,
611 arc_target, arg_32bit_rblimm, lflags_f);
613 INSERT_XOP (q, einsn->name,
614 INSN2OP_0L (einsn->major, einsn->minor), MINSN2OP_0L,
615 arc_target, arg_32bit_zalimm, lflags_f);
617 else if (einsn->flags & (0x10 | ARC_SYNTAX_2OP))
619 /* This is actually a 3OP pattern. The first operand is
620 immplied and is set to zero. */
621 INSERT_XOP (q, einsn->name,
622 INSN3OP_0BC (einsn->major, einsn->minor), MINSN3OP_0BC,
623 arc_target, arg_32bit_rbrc, lflags_f);
625 INSERT_XOP (q, einsn->name,
626 INSN3OP_0BU (einsn->major, einsn->minor), MINSN3OP_0BU,
627 arc_target, arg_32bit_rbu6, lflags_f);
629 INSERT_XOP (q, einsn->name,
630 INSN3OP_0BL (einsn->major, einsn->minor), MINSN3OP_0BL,
631 arc_target, arg_32bit_rblimm, lflags_f);
633 INSERT_XOP (q, einsn->name,
634 INSN3OP_C0LC (einsn->major, einsn->minor), MINSN3OP_C0LC,
635 arc_target, arg_32bit_limmrc, lflags_ccf);
637 INSERT_XOP (q, einsn->name,
638 INSN3OP_C0LU (einsn->major, einsn->minor), MINSN3OP_C0LU,
639 arc_target, arg_32bit_limmu6, lflags_ccf);
641 INSERT_XOP (q, einsn->name,
642 INSN3OP_0LS (einsn->major, einsn->minor), MINSN3OP_0LS,
643 arc_target, arg_32bit_limms12, lflags_f);
645 INSERT_XOP (q, einsn->name,
646 INSN3OP_C0LL (einsn->major, einsn->minor), MINSN3OP_C0LL,
647 arc_target, arg_32bit_limmlimm, lflags_ccf);
649 else if (einsn->flags & ARC_SYNTAX_3OP
650 && !(einsn->modsyn & ARC_OP1_MUST_BE_IMM))
652 /* Regular 3OP instruction. */
653 INSERT_XOP (q, einsn->name,
654 INSN3OP_ABC (einsn->major, einsn->minor), MINSN3OP_ABC,
655 arc_target, arg_32bit_rarbrc, lflags_f);
657 INSERT_XOP (q, einsn->name,
658 INSN3OP_0BC (einsn->major, einsn->minor), MINSN3OP_0BC,
659 arc_target, arg_32bit_zarbrc, lflags_f);
661 INSERT_XOP (q, einsn->name,
662 INSN3OP_CBBC (einsn->major, einsn->minor), MINSN3OP_CBBC,
663 arc_target, arg_32bit_rbrbrc, lflags_ccf);
665 INSERT_XOP (q, einsn->name,
666 INSN3OP_ABU (einsn->major, einsn->minor), MINSN3OP_ABU,
667 arc_target, arg_32bit_rarbu6, lflags_f);
669 INSERT_XOP (q, einsn->name,
670 INSN3OP_0BU (einsn->major, einsn->minor), MINSN3OP_0BU,
671 arc_target, arg_32bit_zarbu6, lflags_f);
673 INSERT_XOP (q, einsn->name,
674 INSN3OP_CBBU (einsn->major, einsn->minor), MINSN3OP_CBBU,
675 arc_target, arg_32bit_rbrbu6, lflags_ccf);
677 INSERT_XOP (q, einsn->name,
678 INSN3OP_BBS (einsn->major, einsn->minor), MINSN3OP_BBS,
679 arc_target, arg_32bit_rbrbs12, lflags_f);
681 INSERT_XOP (q, einsn->name,
682 INSN3OP_ALC (einsn->major, einsn->minor), MINSN3OP_ALC,
683 arc_target, arg_32bit_ralimmrc, lflags_f);
685 INSERT_XOP (q, einsn->name,
686 INSN3OP_ABL (einsn->major, einsn->minor), MINSN3OP_ABL,
687 arc_target, arg_32bit_rarblimm, lflags_f);
689 INSERT_XOP (q, einsn->name,
690 INSN3OP_0LC (einsn->major, einsn->minor), MINSN3OP_0LC,
691 arc_target, arg_32bit_zalimmrc, lflags_f);
693 INSERT_XOP (q, einsn->name,
694 INSN3OP_0BL (einsn->major, einsn->minor), MINSN3OP_0BL,
695 arc_target, arg_32bit_zarblimm, lflags_f);
697 INSERT_XOP (q, einsn->name,
698 INSN3OP_C0LC (einsn->major, einsn->minor), MINSN3OP_C0LC,
699 arc_target, arg_32bit_zalimmrc, lflags_ccf);
701 INSERT_XOP (q, einsn->name,
702 INSN3OP_CBBL (einsn->major, einsn->minor), MINSN3OP_CBBL,
703 arc_target, arg_32bit_rbrblimm, lflags_ccf);
705 INSERT_XOP (q, einsn->name,
706 INSN3OP_ALU (einsn->major, einsn->minor), MINSN3OP_ALU,
707 arc_target, arg_32bit_ralimmu6, lflags_f);
709 INSERT_XOP (q, einsn->name,
710 INSN3OP_0LU (einsn->major, einsn->minor), MINSN3OP_0LU,
711 arc_target, arg_32bit_zalimmu6, lflags_f);
713 INSERT_XOP (q, einsn->name,
714 INSN3OP_C0LU (einsn->major, einsn->minor), MINSN3OP_C0LU,
715 arc_target, arg_32bit_zalimmu6, lflags_ccf);
717 INSERT_XOP (q, einsn->name,
718 INSN3OP_0LS (einsn->major, einsn->minor), MINSN3OP_0LS,
719 arc_target, arg_32bit_zalimms12, lflags_f);
721 INSERT_XOP (q, einsn->name,
722 INSN3OP_ALL (einsn->major, einsn->minor), MINSN3OP_ALL,
723 arc_target, arg_32bit_ralimmlimm, lflags_f);
725 INSERT_XOP (q, einsn->name,
726 INSN3OP_0LL (einsn->major, einsn->minor), MINSN3OP_0LL,
727 arc_target, arg_32bit_zalimmlimm, lflags_f);
729 INSERT_XOP (q, einsn->name,
730 INSN3OP_C0LL (einsn->major, einsn->minor), MINSN3OP_C0LL,
731 arc_target, arg_32bit_zalimmlimm, lflags_ccf);
733 else if (einsn->flags & ARC_SYNTAX_3OP)
735 /* 3OP instruction which accepts only zero as first
737 INSERT_XOP (q, einsn->name,
738 INSN3OP_0BC (einsn->major, einsn->minor), MINSN3OP_0BC,
739 arc_target, arg_32bit_zarbrc, lflags_f);
741 INSERT_XOP (q, einsn->name,
742 INSN3OP_0BU (einsn->major, einsn->minor), MINSN3OP_0BU,
743 arc_target, arg_32bit_zarbu6, lflags_f);
745 INSERT_XOP (q, einsn->name,
746 INSN3OP_0LC (einsn->major, einsn->minor), MINSN3OP_0LC,
747 arc_target, arg_32bit_zalimmrc, lflags_f);
749 INSERT_XOP (q, einsn->name,
750 INSN3OP_0BL (einsn->major, einsn->minor), MINSN3OP_0BL,
751 arc_target, arg_32bit_zarblimm, lflags_f);
753 INSERT_XOP (q, einsn->name,
754 INSN3OP_C0LC (einsn->major, einsn->minor), MINSN3OP_C0LC,
755 arc_target, arg_32bit_zalimmrc, lflags_ccf);
757 INSERT_XOP (q, einsn->name,
758 INSN3OP_0LU (einsn->major, einsn->minor), MINSN3OP_0LU,
759 arc_target, arg_32bit_zalimmu6, lflags_f);
761 INSERT_XOP (q, einsn->name,
762 INSN3OP_C0LU (einsn->major, einsn->minor), MINSN3OP_C0LU,
763 arc_target, arg_32bit_zalimmu6, lflags_ccf);
765 INSERT_XOP (q, einsn->name,
766 INSN3OP_0LS (einsn->major, einsn->minor), MINSN3OP_0LS,
767 arc_target, arg_32bit_zalimms12, lflags_f);
769 INSERT_XOP (q, einsn->name,
770 INSN3OP_0LL (einsn->major, einsn->minor), MINSN3OP_0LL,
771 arc_target, arg_32bit_zalimmlimm, lflags_f);
773 INSERT_XOP (q, einsn->name,
774 INSN3OP_C0LL (einsn->major, einsn->minor), MINSN3OP_C0LL,
775 arc_target, arg_32bit_zalimmlimm, lflags_ccf);
777 else if (einsn->flags & ARC_SYNTAX_1OP)
779 if (einsn->suffix & ARC_SUFFIX_COND)
780 *errmsg = "Suffix SUFFIX_COND ignored";
782 INSERT_XOP (q, einsn->name,
783 INSN2OP (einsn->major, 0x3F) | FIELDB (einsn->minor),
784 MINSN2OP_0C, arc_target, arg_32bit_rc, lflags_f);
786 INSERT_XOP (q, einsn->name,
787 INSN2OP (einsn->major, 0x3F) | FIELDB (einsn->minor)
788 | (0x01 << 22), MINSN2OP_0U, arc_target, arg_32bit_u6,
791 INSERT_XOP (q, einsn->name,
792 INSN2OP (einsn->major, 0x3F) | FIELDB (einsn->minor)
793 | FIELDC (62), MINSN2OP_0L, arc_target, arg_32bit_limm,
797 else if (einsn->flags & ARC_SYNTAX_NOP)
799 if (einsn->suffix & ARC_SUFFIX_COND)
800 *errmsg = "Suffix SUFFIX_COND ignored";
802 INSERT_XOP (q, einsn->name,
803 INSN2OP (einsn->major, 0x3F) | FIELDB (einsn->minor)
804 | (0x01 << 22), MINSN2OP_0L, arc_target, arg_none, lflags_f);
808 *errmsg = "Unknown syntax";
813 memset (q, 0, sizeof (*arc_ext_opcodes));
815 return arc_ext_opcodes;