1 /* Disassembler code for CRIS.
2 Copyright 2000, 2001, 2002, 2004, 2005 Free Software Foundation, Inc.
3 Contributed by Axis Communications AB, Lund, Sweden.
4 Written by Hans-Peter Nilsson.
6 This file is part of the GNU binutils and GDB, the GNU debugger.
8 This program is free software; you can redistribute it and/or modify it
9 under the terms of the GNU General Public License as published by the
10 Free Software Foundation; either version 2, or (at your option) any later
13 This program is distributed in the hope that it will be useful, but WITHOUT
14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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., 51 Franklin Street - Fifth Floor, Boston,
21 MA 02110-1301, USA. */
25 #include "opcode/cris.h"
26 #include "libiberty.h"
28 /* No instruction will be disassembled longer than this. In theory, and
29 in silicon, address prefixes can be cascaded. In practice, cascading
30 is not used by GCC, and not supported by the assembler. */
31 #ifndef MAX_BYTES_PER_CRIS_INSN
32 #define MAX_BYTES_PER_CRIS_INSN 8
35 /* Whether or not to decode prefixes, folding it into the following
36 instruction. FIXME: Make this optional later. */
38 #define PARSE_PREFIX 1
41 /* Sometimes we prefix all registers with this character. */
42 #define REGISTER_PREFIX_CHAR '$'
44 /* Whether or not to trace the following sequence:
49 This is the assembly form of a switch-statement in C.
50 The "sub is optional. If there is none, then X will be zero.
51 X is the value of the first case,
52 Y is the number of cases (including default).
54 This results in case offsets printed on the form:
55 case N: -> case_address
56 where N is an estimation on the corresponding 'case' operand in C,
57 and case_address is where execution of that case continues after the
58 sequence presented above.
60 The old style of output was to print the offsets as instructions,
61 which made it hard to follow "case"-constructs in the disassembly,
62 and caused a lot of annoying warnings about undefined instructions.
64 FIXME: Make this optional later. */
66 #define TRACE_CASE (disdata->trace_case)
69 enum cris_disass_family
70 { cris_dis_v0_v10, cris_dis_common_v10_v32, cris_dis_v32 };
72 /* Stored in the disasm_info->private_data member. */
73 struct cris_disasm_data
75 /* Whether to print something less confusing if we find something
76 matching a switch-construct. */
77 bfd_boolean trace_case;
79 /* Whether this code is flagged as crisv32. FIXME: Should be an enum
80 that includes "compatible". */
81 enum cris_disass_family distype;
84 /* Value of first element in switch. */
85 static long case_offset = 0;
87 /* How many more case-offsets to print. */
88 static long case_offset_counter = 0;
90 /* Number of case offsets. */
91 static long no_of_case_offsets = 0;
93 /* Candidate for next case_offset. */
94 static long last_immediate = 0;
96 static int cris_constraint
97 (const char *, unsigned, unsigned, struct cris_disasm_data *);
99 /* Parse disassembler options and store state in info. FIXME: For the
100 time being, we abuse static variables. */
103 cris_parse_disassembler_options (disassemble_info *info,
104 enum cris_disass_family distype)
106 struct cris_disasm_data *disdata;
108 info->private_data = calloc (1, sizeof (struct cris_disasm_data));
109 disdata = (struct cris_disasm_data *) info->private_data;
115 = (info->disassembler_options == NULL
116 || (strcmp (info->disassembler_options, "nocase") != 0));
118 disdata->distype = distype;
122 static const struct cris_spec_reg *
123 spec_reg_info (unsigned int sreg, enum cris_disass_family distype)
127 for (i = 0; cris_spec_regs[i].name != NULL; i++)
129 if (cris_spec_regs[i].number == sreg)
131 if (distype == cris_dis_v32)
132 switch (cris_spec_regs[i].applicable_version)
134 case cris_ver_warning:
135 case cris_ver_version_all:
140 /* No ambiguous sizes or register names with CRISv32. */
141 if (cris_spec_regs[i].warning == NULL)
142 return &cris_spec_regs[i];
146 else if (cris_spec_regs[i].applicable_version != cris_ver_v32p)
147 return &cris_spec_regs[i];
154 /* Return the number of bits in the argument. */
157 number_of_bits (unsigned int val)
161 for (bits = 0; val != 0; val &= val - 1)
167 /* Get an entry in the opcode-table. */
169 static const struct cris_opcode *
170 get_opcode_entry (unsigned int insn,
171 unsigned int prefix_insn,
172 struct cris_disasm_data *disdata)
174 /* For non-prefixed insns, we keep a table of pointers, indexed by the
175 insn code. Each entry is initialized when found to be NULL. */
176 static const struct cris_opcode **opc_table = NULL;
178 const struct cris_opcode *max_matchedp = NULL;
179 const struct cris_opcode **prefix_opc_table = NULL;
181 /* We hold a table for each prefix that need to be handled differently. */
182 static const struct cris_opcode **dip_prefixes = NULL;
183 static const struct cris_opcode **bdapq_m1_prefixes = NULL;
184 static const struct cris_opcode **bdapq_m2_prefixes = NULL;
185 static const struct cris_opcode **bdapq_m4_prefixes = NULL;
186 static const struct cris_opcode **rest_prefixes = NULL;
188 /* Allocate and clear the opcode-table. */
189 if (opc_table == NULL)
191 opc_table = malloc (65536 * sizeof (opc_table[0]));
192 if (opc_table == NULL)
195 memset (opc_table, 0, 65536 * sizeof (const struct cris_opcode *));
198 = malloc (65536 * sizeof (const struct cris_opcode **));
199 if (dip_prefixes == NULL)
202 memset (dip_prefixes, 0, 65536 * sizeof (dip_prefixes[0]));
205 = malloc (65536 * sizeof (const struct cris_opcode **));
206 if (bdapq_m1_prefixes == NULL)
209 memset (bdapq_m1_prefixes, 0, 65536 * sizeof (bdapq_m1_prefixes[0]));
212 = malloc (65536 * sizeof (const struct cris_opcode **));
213 if (bdapq_m2_prefixes == NULL)
216 memset (bdapq_m2_prefixes, 0, 65536 * sizeof (bdapq_m2_prefixes[0]));
219 = malloc (65536 * sizeof (const struct cris_opcode **));
220 if (bdapq_m4_prefixes == NULL)
223 memset (bdapq_m4_prefixes, 0, 65536 * sizeof (bdapq_m4_prefixes[0]));
226 = malloc (65536 * sizeof (const struct cris_opcode **));
227 if (rest_prefixes == NULL)
230 memset (rest_prefixes, 0, 65536 * sizeof (rest_prefixes[0]));
233 /* Get the right table if this is a prefix.
234 This code is connected to cris_constraints in that it knows what
235 prefixes play a role in recognition of patterns; the necessary
236 state is reflected by which table is used. If constraints
237 involving match or non-match of prefix insns are changed, then this
238 probably needs changing too. */
239 if (prefix_insn != NO_CRIS_PREFIX)
241 const struct cris_opcode *popcodep
242 = (opc_table[prefix_insn] != NULL
243 ? opc_table[prefix_insn]
244 : get_opcode_entry (prefix_insn, NO_CRIS_PREFIX, disdata));
246 if (popcodep == NULL)
249 if (popcodep->match == BDAP_QUICK_OPCODE)
251 /* Since some offsets are recognized with "push" macros, we
252 have to have different tables for them. */
253 int offset = (prefix_insn & 255);
261 prefix_opc_table = bdapq_m4_prefixes;
265 prefix_opc_table = bdapq_m2_prefixes;
269 prefix_opc_table = bdapq_m1_prefixes;
273 prefix_opc_table = rest_prefixes;
277 else if (popcodep->match == DIP_OPCODE)
278 /* We don't allow postincrement when the prefix is DIP, so use a
279 different table for DIP. */
280 prefix_opc_table = dip_prefixes;
282 prefix_opc_table = rest_prefixes;
285 if (prefix_insn != NO_CRIS_PREFIX
286 && prefix_opc_table[insn] != NULL)
287 max_matchedp = prefix_opc_table[insn];
288 else if (prefix_insn == NO_CRIS_PREFIX && opc_table[insn] != NULL)
289 max_matchedp = opc_table[insn];
292 const struct cris_opcode *opcodep;
293 int max_level_of_match = -1;
295 for (opcodep = cris_opcodes;
296 opcodep->name != NULL;
301 if (disdata->distype == cris_dis_v32)
303 switch (opcodep->applicable_version)
305 case cris_ver_version_all:
311 case cris_ver_sim_v0_10:
314 case cris_ver_warning:
331 switch (opcodep->applicable_version)
333 case cris_ver_version_all:
340 case cris_ver_sim_v0_10:
342 case cris_ver_warning:
355 /* We give a double lead for bits matching the template in
356 cris_opcodes. Not even, because then "move p8,r10" would
357 be given 2 bits lead over "clear.d r10". When there's a
358 tie, the first entry in the table wins. This is
359 deliberate, to avoid a more complicated recognition
361 if ((opcodep->match & insn) == opcodep->match
362 && (opcodep->lose & insn) == 0
364 = cris_constraint (opcodep->args,
370 += 2 * number_of_bits (opcodep->match
372 > max_level_of_match))
374 max_matchedp = opcodep;
375 max_level_of_match = level_of_match;
377 /* If there was a full match, never mind looking
379 if (level_of_match >= 2 * 16)
383 /* Fill in the new entry.
385 If there are changes to the opcode-table involving prefixes, and
386 disassembly then does not work correctly, try removing the
387 else-clause below that fills in the prefix-table. If that
388 helps, you need to change the prefix_opc_table setting above, or
389 something related. */
390 if (prefix_insn == NO_CRIS_PREFIX)
391 opc_table[insn] = max_matchedp;
393 prefix_opc_table[insn] = max_matchedp;
399 /* Return -1 if the constraints of a bitwise-matched instruction say
400 that there is no match. Otherwise return a nonnegative number
401 indicating the confidence in the match (higher is better). */
404 cris_constraint (const char *cs,
406 unsigned int prefix_insn,
407 struct cris_disasm_data *disdata)
414 for (s = cs; *s; s++)
418 /* Do not recognize "pop" if there's a prefix and then only for
420 if (prefix_insn != NO_CRIS_PREFIX
421 || disdata->distype != cris_dis_v0_v10)
426 /* Not recognized at disassembly. */
430 /* Size modifier for "clear", i.e. special register 0, 4 or 8.
431 Check that it is one of them. Only special register 12 could
432 be mismatched, but checking for matches is more logical than
433 checking for mismatches when there are only a few cases. */
434 tmp = ((insn >> 12) & 0xf);
435 if (tmp != 0 && tmp != 4 && tmp != 8)
440 if ((insn & 0x30) == 0x30)
445 /* A prefix operand without side-effect. */
446 if (prefix_insn != NO_CRIS_PREFIX && (insn & 0x400) == 0)
457 /* If this is a prefixed insn with postincrement (side-effect),
458 the prefix must not be DIP. */
459 if (prefix_insn != NO_CRIS_PREFIX)
463 const struct cris_opcode *prefix_opcodep
464 = get_opcode_entry (prefix_insn, NO_CRIS_PREFIX, disdata);
466 if (prefix_opcodep->match == DIP_OPCODE)
475 /* If we don't fall through, then the prefix is ok. */
478 /* A "push" prefix. Check for valid "push" size.
479 In case of special register, it may be != 4. */
480 if (prefix_insn != NO_CRIS_PREFIX)
482 /* Match the prefix insn to BDAPQ. */
483 const struct cris_opcode *prefix_opcodep
484 = get_opcode_entry (prefix_insn, NO_CRIS_PREFIX, disdata);
486 if (prefix_opcodep->match == BDAP_QUICK_OPCODE)
488 int pushsize = (prefix_insn & 255);
495 unsigned int spec_reg = (insn >> 12) & 15;
496 const struct cris_spec_reg *sregp
497 = spec_reg_info (spec_reg, disdata->distype);
499 /* For a special-register, the "prefix size" must
500 match the size of the register. */
501 if (sregp && sregp->reg_size == (unsigned int) -pushsize)
504 else if (s[1] == 'R')
506 if ((insn & 0x30) == 0x20 && pushsize == -4)
509 /* FIXME: Should abort here; next constraint letter
510 *must* be 'P' or 'R'. */
516 retval = (((insn >> 12) & 15) == (insn & 15));
525 const struct cris_spec_reg *sregp
526 = spec_reg_info ((insn >> 12) & 15, disdata->distype);
528 /* Since we match four bits, we will give a value of 4-1 = 3
529 in a match. If there is a corresponding exact match of a
530 special register in another pattern, it will get a value of
531 4, which will be higher. This should be correct in that an
532 exact pattern would match better than a general pattern.
534 Note that there is a reason for not returning zero; the
535 pattern for "clear" is partly matched in the bit-pattern
536 (the two lower bits must be zero), while the bit-pattern
537 for a move from a special register is matched in the
538 register constraint. */
550 if (prefix_insn != NO_CRIS_PREFIX && ! prefix_ok)
556 /* Format number as hex with a leading "0x" into outbuffer. */
559 format_hex (unsigned long number,
561 struct cris_disasm_data *disdata)
563 /* Truncate negative numbers on >32-bit hosts. */
564 number &= 0xffffffff;
566 sprintf (outbuffer, "0x%lx", number);
568 /* Save this value for the "case" support. */
570 last_immediate = number;
572 return outbuffer + strlen (outbuffer);
575 /* Format number as decimal into outbuffer. Parameter signedp says
576 whether the number should be formatted as signed (!= 0) or
580 format_dec (long number, char *outbuffer, int signedp)
582 last_immediate = number;
583 sprintf (outbuffer, signedp ? "%ld" : "%lu", number);
585 return outbuffer + strlen (outbuffer);
588 /* Format the name of the general register regno into outbuffer. */
591 format_reg (struct cris_disasm_data *disdata,
593 char *outbuffer_start,
594 bfd_boolean with_reg_prefix)
596 char *outbuffer = outbuffer_start;
599 *outbuffer++ = REGISTER_PREFIX_CHAR;
604 /* For v32, there is no context in which we output PC. */
605 if (disdata->distype == cris_dis_v32)
606 strcpy (outbuffer, "acr");
608 strcpy (outbuffer, "pc");
612 strcpy (outbuffer, "sp");
616 sprintf (outbuffer, "r%d", regno);
620 return outbuffer_start + strlen (outbuffer_start);
623 /* Format the name of a support register into outbuffer. */
626 format_sup_reg (unsigned int regno,
627 char *outbuffer_start,
628 bfd_boolean with_reg_prefix)
630 char *outbuffer = outbuffer_start;
634 *outbuffer++ = REGISTER_PREFIX_CHAR;
636 for (i = 0; cris_support_regs[i].name != NULL; i++)
637 if (cris_support_regs[i].number == regno)
639 sprintf (outbuffer, "%s", cris_support_regs[i].name);
640 return outbuffer_start + strlen (outbuffer_start);
643 /* There's supposed to be register names covering all numbers, though
644 some may be generic names. */
645 sprintf (outbuffer, "format_sup_reg-BUG");
646 return outbuffer_start + strlen (outbuffer_start);
649 /* Return the length of an instruction. */
652 bytes_to_skip (unsigned int insn,
653 const struct cris_opcode *matchedp,
654 enum cris_disass_family distype)
656 /* Each insn is a word plus "immediate" operands. */
657 unsigned to_skip = 2;
658 const char *template = matchedp->args;
661 for (s = template; *s; s++)
662 if ((*s == 's' || *s == 'N' || *s == 'Y')
663 && (insn & 0x400) && (insn & 15) == 15)
665 /* Immediate via [pc+], so we have to check the size of the
667 int mode_size = 1 << ((insn >> 4) & (*template == 'z' ? 1 : 3));
669 if (matchedp->imm_oprnd_size == SIZE_FIX_32)
671 else if (matchedp->imm_oprnd_size == SIZE_SPEC_REG)
673 const struct cris_spec_reg *sregp
674 = spec_reg_info ((insn >> 12) & 15, distype);
676 /* FIXME: Improve error handling; should have been caught
681 /* PC is incremented by two, not one, for a byte. Except on
682 CRISv32, where constants are always DWORD-size for
683 special registers. */
685 distype == cris_dis_v32 ? 4 : (sregp->reg_size + 1) & ~1;
688 to_skip += (mode_size + 1) & ~1;
698 /* Print condition code flags. */
701 print_flags (struct cris_disasm_data *disdata, unsigned int insn, char *cp)
703 /* Use the v8 (Etrax 100) flag definitions for disassembly.
704 The differences with v0 (Etrax 1..4) vs. Svinto are:
707 FIXME: Emit v0..v3 flag names somehow. */
708 static const char v8_fnames[] = "cvznxibm";
709 static const char v32_fnames[] = "cvznxiup";
711 = disdata->distype == cris_dis_v32 ? v32_fnames : v8_fnames;
713 unsigned char flagbits = (((insn >> 8) & 0xf0) | (insn & 15));
716 for (i = 0; i < 8; i++)
717 if (flagbits & (1 << i))
723 /* Print out an insn with its operands, and update the info->insn_type
724 fields. The prefix_opcodep and the rest hold a prefix insn that is
725 supposed to be output as an address mode. */
728 print_with_operands (const struct cris_opcode *opcodep,
730 unsigned char *buffer,
732 disassemble_info *info,
733 /* If a prefix insn was before this insn (and is supposed
734 to be output as an address), here is a description of
736 const struct cris_opcode *prefix_opcodep,
737 unsigned int prefix_insn,
738 unsigned char *prefix_buffer,
739 bfd_boolean with_reg_prefix)
741 /* Get a buffer of somewhat reasonable size where we store
742 intermediate parts of the insn. */
743 char temp[sizeof (".d [$r13=$r12-2147483648],$r10") * 2];
745 static const char mode_char[] = "bwd?";
748 struct cris_disasm_data *disdata
749 = (struct cris_disasm_data *) info->private_data;
751 /* Print out the name first thing we do. */
752 (*info->fprintf_func) (info->stream, "%s", opcodep->name);
757 /* Ignore any prefix indicator. */
761 if (*s == 'm' || *s == 'M' || *s == 'z')
765 /* Get the size-letter. */
767 ? (insn & 0x8000 ? 'd'
768 : insn & 0x4000 ? 'w' : 'b')
769 : mode_char[(insn >> 4) & (*s == 'z' ? 1 : 3)];
771 /* Ignore the size and the space character that follows. */
775 /* Add a space if this isn't a long-branch, because for those will add
776 the condition part of the name later. */
777 if (opcodep->match != (BRANCH_PC_LOW + BRANCH_INCR_HIGH * 256))
780 /* Fill in the insn-type if deducible from the name (and there's no
782 if (opcodep->name[0] == 'j')
784 if (strncmp (opcodep->name, "jsr", 3) == 0)
785 /* It's "jsr" or "jsrc". */
786 info->insn_type = dis_jsr;
788 /* Any other jump-type insn is considered a branch. */
789 info->insn_type = dis_branch;
792 /* We might know some more fields right now. */
793 info->branch_delay_insns = opcodep->delayed;
795 /* Handle operands. */
801 tp = format_sup_reg ((insn >> 12) & 15, tp, with_reg_prefix);
806 *tp++ = REGISTER_PREFIX_CHAR;
819 /* Ignore at this point; used at earlier stages to avoid
820 recognition if there's a prefix at something that in other
821 ways looks like a "pop". */
825 /* Ignore. This is an optional ".d " on the large one of
830 /* This was the prefix that made this a "push". We've already
831 handled it by recognizing it, so signal that the prefix is
832 handled by setting it to NULL. */
833 prefix_opcodep = NULL;
838 tp = format_reg (disdata, insn & 15, tp, with_reg_prefix);
842 tp = format_reg (disdata, (insn >> 12) & 15, tp, with_reg_prefix);
847 /* Like N but pc-relative to the start of the insn. */
849 = (buffer[2] + buffer[3] * 256 + buffer[4] * 65536
850 + buffer[5] * 0x1000000 + addr);
852 /* Finish off and output previous formatted bytes. */
855 (*info->fprintf_func) (info->stream, "%s", temp);
858 (*info->print_address_func) ((bfd_vma) number, info);
864 /* Like n but the offset is bits <3:0> in the instruction. */
865 unsigned long number = (buffer[0] & 0xf) * 2 + addr;
867 /* Finish off and output previous formatted bytes. */
870 (*info->fprintf_func) (info->stream, "%s", temp);
873 (*info->print_address_func) ((bfd_vma) number, info);
882 /* Any "normal" memory operand. */
883 if ((insn & 0x400) && (insn & 15) == 15)
885 /* We're looking at [pc+], i.e. we need to output an immediate
886 number, where the size can depend on different things. */
889 = ((*cs == 'z' && (insn & 0x20))
890 || opcodep->match == BDAP_QUICK_OPCODE);
893 if (opcodep->imm_oprnd_size == SIZE_FIX_32)
895 else if (opcodep->imm_oprnd_size == SIZE_SPEC_REG)
897 const struct cris_spec_reg *sregp
898 = spec_reg_info ((insn >> 12) & 15, disdata->distype);
900 /* A NULL return should have been as a non-match earlier,
901 so catch it as an internal error in the error-case
904 /* Whatever non-valid size. */
907 /* PC is always incremented by a multiple of two.
908 For CRISv32, immediates are always 4 bytes for
909 special registers. */
910 nbytes = disdata->distype == cris_dis_v32
911 ? 4 : (sregp->reg_size + 1) & ~1;
915 int mode_size = 1 << ((insn >> 4) & (*cs == 'z' ? 1 : 3));
927 if (signedp && number > 127)
932 number = buffer[2] + buffer[3] * 256;
933 if (signedp && number > 32767)
939 = buffer[2] + buffer[3] * 256 + buffer[4] * 65536
940 + buffer[5] * 0x1000000;
949 if ((*cs == 'z' && (insn & 0x20))
950 || (opcodep->match == BDAP_QUICK_OPCODE
951 && (nbytes <= 2 || buffer[1 + nbytes] == 0)))
952 tp = format_dec (number, tp, signedp);
955 unsigned int highbyte = (number >> 24) & 0xff;
957 /* Either output this as an address or as a number. If it's
958 a dword with the same high-byte as the address of the
959 insn, assume it's an address, and also if it's a non-zero
960 non-0xff high-byte. If this is a jsr or a jump, then
961 it's definitely an address. */
963 && (highbyte == ((addr >> 24) & 0xff)
964 || (highbyte != 0 && highbyte != 0xff)
965 || info->insn_type == dis_branch
966 || info->insn_type == dis_jsr))
968 /* Finish off and output previous formatted bytes. */
972 (*info->fprintf_func) (info->stream, "%s", temp);
974 (*info->print_address_func) ((bfd_vma) number, info);
976 info->target = number;
979 tp = format_hex (number, tp, disdata);
984 /* Not an immediate number. Then this is a (possibly
985 prefixed) memory operand. */
986 if (info->insn_type != dis_nonbranch)
990 & (opcodep->args[0] == 'z' ? 1 : 3));
992 info->insn_type = dis_dref;
993 info->flags |= CRIS_DIS_FLAG_MEMREF;
995 if (opcodep->imm_oprnd_size == SIZE_FIX_32)
997 else if (opcodep->imm_oprnd_size == SIZE_SPEC_REG)
999 const struct cris_spec_reg *sregp
1000 = spec_reg_info ((insn >> 12) & 15, disdata->distype);
1002 /* FIXME: Improve error handling; should have been caught
1007 size = sregp->reg_size;
1012 info->data_size = size;
1018 /* We don't match dip with a postincremented field
1019 as a side-effect address mode. */
1020 && ((insn & 0x400) == 0
1021 || prefix_opcodep->match != DIP_OPCODE))
1025 tp = format_reg (disdata, insn & 15, tp, with_reg_prefix);
1030 /* We mainly ignore the prefix format string when the
1031 address-mode syntax is output. */
1032 switch (prefix_opcodep->match)
1035 /* It's [r], [r+] or [pc+]. */
1036 if ((prefix_insn & 0x400) && (prefix_insn & 15) == 15)
1038 /* It's [pc+]. This cannot possibly be anything
1040 unsigned long number
1041 = prefix_buffer[2] + prefix_buffer[3] * 256
1042 + prefix_buffer[4] * 65536
1043 + prefix_buffer[5] * 0x1000000;
1045 info->target = (bfd_vma) number;
1047 /* Finish off and output previous formatted
1052 (*info->fprintf_func) (info->stream, "%s", temp);
1054 (*info->print_address_func) ((bfd_vma) number, info);
1058 /* For a memref in an address, we use target2.
1059 In this case, target is zero. */
1061 |= (CRIS_DIS_FLAG_MEM_TARGET2_IS_REG
1062 | CRIS_DIS_FLAG_MEM_TARGET2_MEM);
1064 info->target2 = prefix_insn & 15;
1067 tp = format_reg (disdata, prefix_insn & 15, tp,
1069 if (prefix_insn & 0x400)
1075 case BDAP_QUICK_OPCODE:
1079 number = prefix_buffer[0];
1083 /* Output "reg+num" or, if num < 0, "reg-num". */
1084 tp = format_reg (disdata, (prefix_insn >> 12) & 15, tp,
1088 tp = format_dec (number, tp, 1);
1090 info->flags |= CRIS_DIS_FLAG_MEM_TARGET_IS_REG;
1091 info->target = (prefix_insn >> 12) & 15;
1092 info->target2 = (bfd_vma) number;
1097 /* Output "r+R.m". */
1098 tp = format_reg (disdata, prefix_insn & 15, tp,
1101 tp = format_reg (disdata, (prefix_insn >> 12) & 15, tp,
1104 *tp++ = mode_char[(prefix_insn >> 4) & 3];
1107 |= (CRIS_DIS_FLAG_MEM_TARGET2_IS_REG
1108 | CRIS_DIS_FLAG_MEM_TARGET_IS_REG
1110 | ((prefix_insn & 0x8000)
1111 ? CRIS_DIS_FLAG_MEM_TARGET2_MULT4
1112 : ((prefix_insn & 0x8000)
1113 ? CRIS_DIS_FLAG_MEM_TARGET2_MULT2 : 0)));
1115 /* Is it the casejump? It's a "adds.w [pc+r%d.w],pc". */
1116 if (insn == 0xf83f && (prefix_insn & ~0xf000) == 0x55f)
1117 /* Then start interpreting data as offsets. */
1118 case_offset_counter = no_of_case_offsets;
1121 case BDAP_INDIR_OPCODE:
1122 /* Output "r+s.m", or, if "s" is [pc+], "r+s" or
1124 tp = format_reg (disdata, (prefix_insn >> 12) & 15, tp,
1127 if ((prefix_insn & 0x400) && (prefix_insn & 15) == 15)
1130 unsigned int nbytes;
1132 /* It's a value. Get its size. */
1133 int mode_size = 1 << ((prefix_insn >> 4) & 3);
1143 number = prefix_buffer[2];
1149 number = prefix_buffer[2] + prefix_buffer[3] * 256;
1156 = prefix_buffer[2] + prefix_buffer[3] * 256
1157 + prefix_buffer[4] * 65536
1158 + prefix_buffer[5] * 0x1000000;
1167 info->flags |= CRIS_DIS_FLAG_MEM_TARGET_IS_REG;
1168 info->target2 = (bfd_vma) number;
1170 /* If the size is dword, then assume it's an
1174 /* Finish off and output previous formatted
1179 (*info->fprintf_func) (info->stream, "%s", temp);
1181 (*info->print_address_func) ((bfd_vma) number, info);
1187 tp = format_dec (number, tp, 1);
1192 /* Output "r+[R].m" or "r+[R+].m". */
1195 tp = format_reg (disdata, prefix_insn & 15, tp,
1197 if (prefix_insn & 0x400)
1201 *tp++ = mode_char[(prefix_insn >> 4) & 3];
1204 |= (CRIS_DIS_FLAG_MEM_TARGET2_IS_REG
1205 | CRIS_DIS_FLAG_MEM_TARGET2_MEM
1206 | CRIS_DIS_FLAG_MEM_TARGET_IS_REG
1208 | (((prefix_insn >> 4) == 2)
1210 : (((prefix_insn >> 4) & 3) == 1
1211 ? CRIS_DIS_FLAG_MEM_TARGET2_MEM_WORD
1212 : CRIS_DIS_FLAG_MEM_TARGET2_MEM_BYTE)));
1217 (*info->fprintf_func) (info->stream, "?prefix-bug");
1220 /* To mark that the prefix is used, reset it. */
1221 prefix_opcodep = NULL;
1225 tp = format_reg (disdata, insn & 15, tp, with_reg_prefix);
1227 info->flags |= CRIS_DIS_FLAG_MEM_TARGET_IS_REG;
1228 info->target = insn & 15;
1238 tp = format_reg (disdata, (insn >> 12) & 15, tp, with_reg_prefix);
1240 *tp++ = mode_char[(insn >> 4) & 3];
1244 tp = format_dec (insn & 63, tp, 0);
1249 int where = buffer[2] + buffer[3] * 256;
1254 where += addr + ((disdata->distype == cris_dis_v32) ? 0 : 4);
1256 if (insn == BA_PC_INCR_OPCODE)
1257 info->insn_type = dis_branch;
1259 info->insn_type = dis_condbranch;
1261 info->target = (bfd_vma) where;
1265 (*info->fprintf_func) (info->stream, "%s%s ",
1266 temp, cris_cc_strings[insn >> 12]);
1268 (*info->print_address_func) ((bfd_vma) where, info);
1273 tp = format_dec (insn & 31, tp, 0);
1277 tp = format_dec (insn & 15, tp, 0);
1282 long offset = insn & 0xfe;
1288 if (opcodep->match == BA_QUICK_OPCODE)
1289 info->insn_type = dis_branch;
1291 info->insn_type = dis_condbranch;
1293 target = addr + ((disdata->distype == cris_dis_v32) ? 0 : 2) + offset;
1294 info->target = target;
1297 (*info->fprintf_func) (info->stream, "%s", temp);
1298 (*info->print_address_func) (target, info);
1305 long number = buffer[0];
1308 number = number - 256;
1310 tp = format_dec (number, tp, 1);
1312 tp = format_reg (disdata, (insn >> 12) & 15, tp, with_reg_prefix);
1317 tp = print_flags (disdata, insn, tp);
1321 tp = format_dec ((insn & 32) ? (insn & 31) | ~31L : insn & 31, tp, 1);
1326 const struct cris_spec_reg *sregp
1327 = spec_reg_info ((insn >> 12) & 15, disdata->distype);
1329 if (sregp->name == NULL)
1330 /* Should have been caught as a non-match eariler. */
1334 if (with_reg_prefix)
1335 *tp++ = REGISTER_PREFIX_CHAR;
1336 strcpy (tp, sregp->name);
1351 (*info->fprintf_func) (info->stream, " (OOPS unused prefix \"%s: %s\")",
1352 prefix_opcodep->name, prefix_opcodep->args);
1354 (*info->fprintf_func) (info->stream, "%s", temp);
1356 /* Get info for matching case-tables, if we don't have any active.
1357 We assume that the last constant seen is used; either in the insn
1358 itself or in a "move.d const,rN, sub.d rN,rM"-like sequence. */
1359 if (TRACE_CASE && case_offset_counter == 0)
1361 if (strncmp (opcodep->name, "sub", 3) == 0)
1362 case_offset = last_immediate;
1364 /* It could also be an "add", if there are negative case-values. */
1365 else if (strncmp (opcodep->name, "add", 3) == 0)
1366 /* The first case is the negated operand to the add. */
1367 case_offset = -last_immediate;
1369 /* A bound insn will tell us the number of cases. */
1370 else if (strncmp (opcodep->name, "bound", 5) == 0)
1371 no_of_case_offsets = last_immediate + 1;
1373 /* A jump or jsr or branch breaks the chain of insns for a
1374 case-table, so assume default first-case again. */
1375 else if (info->insn_type == dis_jsr
1376 || info->insn_type == dis_branch
1377 || info->insn_type == dis_condbranch)
1383 /* Print the CRIS instruction at address memaddr on stream. Returns
1384 length of the instruction, in bytes. Prefix register names with `$' if
1388 print_insn_cris_generic (bfd_vma memaddr,
1389 disassemble_info *info,
1390 bfd_boolean with_reg_prefix)
1394 const struct cris_opcode *matchedp;
1396 struct cris_disasm_data *disdata
1397 = (struct cris_disasm_data *) info->private_data;
1399 /* No instruction will be disassembled as longer than this number of
1400 bytes; stacked prefixes will not be expanded. */
1401 unsigned char buffer[MAX_BYTES_PER_CRIS_INSN];
1402 unsigned char *bufp;
1406 /* There will be an "out of range" error after the last instruction.
1407 Reading pairs of bytes in decreasing number, we hope that we will get
1408 at least the amount that we will consume.
1410 If we can't get any data, or we do not get enough data, we print
1411 the error message. */
1413 for (nbytes = MAX_BYTES_PER_CRIS_INSN; nbytes > 0; nbytes -= 2)
1415 status = (*info->read_memory_func) (memaddr, buffer, nbytes, info);
1420 /* If we did not get all we asked for, then clear the rest.
1421 Hopefully this makes a reproducible result in case of errors. */
1422 if (nbytes != MAX_BYTES_PER_CRIS_INSN)
1423 memset (buffer + nbytes, 0, MAX_BYTES_PER_CRIS_INSN - nbytes);
1428 /* Set some defaults for the insn info. */
1429 info->insn_info_valid = 1;
1430 info->branch_delay_insns = 0;
1431 info->data_size = 0;
1432 info->insn_type = dis_nonbranch;
1437 /* If we got any data, disassemble it. */
1442 insn = bufp[0] + bufp[1] * 256;
1444 /* If we're in a case-table, don't disassemble the offsets. */
1445 if (TRACE_CASE && case_offset_counter != 0)
1447 info->insn_type = dis_noninsn;
1450 /* If to print data as offsets, then shortcut here. */
1451 (*info->fprintf_func) (info->stream, "case %ld%s: -> ",
1452 case_offset + no_of_case_offsets
1453 - case_offset_counter,
1454 case_offset_counter == 1 ? "/default" :
1457 (*info->print_address_func) ((bfd_vma)
1460 - (no_of_case_offsets
1461 - case_offset_counter)
1463 case_offset_counter--;
1465 /* The default case start (without a "sub" or "add") must be
1467 if (case_offset_counter == 0)
1472 /* We're often called to disassemble zeroes. While this is a
1473 valid "bcc .+2" insn, it is also useless enough and enough
1474 of a nuiscance that we will just output "bcc .+2" for it
1475 and signal it as a noninsn. */
1476 (*info->fprintf_func) (info->stream,
1477 disdata->distype == cris_dis_v32
1478 ? "bcc ." : "bcc .+2");
1479 info->insn_type = dis_noninsn;
1484 const struct cris_opcode *prefix_opcodep = NULL;
1485 unsigned char *prefix_buffer = bufp;
1486 unsigned int prefix_insn = insn;
1487 int prefix_size = 0;
1489 matchedp = get_opcode_entry (insn, NO_CRIS_PREFIX, disdata);
1491 /* Check if we're supposed to write out prefixes as address
1492 modes and if this was a prefix. */
1493 if (matchedp != NULL && PARSE_PREFIX && matchedp->args[0] == 'p')
1495 /* If it's a prefix, put it into the prefix vars and get the
1497 prefix_size = bytes_to_skip (prefix_insn, matchedp,
1499 prefix_opcodep = matchedp;
1501 insn = bufp[prefix_size] + bufp[prefix_size + 1] * 256;
1502 matchedp = get_opcode_entry (insn, prefix_insn, disdata);
1504 if (matchedp != NULL)
1506 addr += prefix_size;
1507 bufp += prefix_size;
1508 advance += prefix_size;
1512 /* The "main" insn wasn't valid, at least not when
1513 prefixed. Put back things enough to output the
1514 prefix insn only, as a normal insn. */
1515 matchedp = prefix_opcodep;
1517 prefix_opcodep = NULL;
1521 if (matchedp == NULL)
1523 (*info->fprintf_func) (info->stream, "??0x%x", insn);
1526 info->insn_type = dis_noninsn;
1530 advance += bytes_to_skip (insn, matchedp, disdata->distype);
1532 /* The info_type and assorted fields will be set according
1534 print_with_operands (matchedp, insn, bufp, addr, info,
1535 prefix_opcodep, prefix_insn,
1536 prefix_buffer, with_reg_prefix);
1541 info->insn_type = dis_noninsn;
1543 /* If we read less than MAX_BYTES_PER_CRIS_INSN, i.e. we got an error
1544 status when reading that much, and the insn decoding indicated a
1545 length exceeding what we read, there is an error. */
1546 if (status != 0 && (nbytes == 0 || advance > nbytes))
1548 (*info->memory_error_func) (status, memaddr, info);
1552 /* Max supported insn size with one folded prefix insn. */
1553 info->bytes_per_line = MAX_BYTES_PER_CRIS_INSN;
1555 /* I would like to set this to a fixed value larger than the actual
1556 number of bytes to print in order to avoid spaces between bytes,
1557 but objdump.c (2.9.1) does not like that, so we print 16-bit
1558 chunks, which is the next choice. */
1559 info->bytes_per_chunk = 2;
1561 /* Printing bytes in order of increasing addresses makes sense,
1562 especially on a little-endian target.
1563 This is completely the opposite of what you think; setting this to
1564 BFD_ENDIAN_LITTLE will print bytes in order N..0 rather than the 0..N
1566 info->display_endian = BFD_ENDIAN_BIG;
1571 /* Disassemble, prefixing register names with `$'. CRIS v0..v10. */
1574 print_insn_cris_with_register_prefix (bfd_vma vma,
1575 disassemble_info *info)
1577 if (info->private_data == NULL
1578 && !cris_parse_disassembler_options (info, cris_dis_v0_v10))
1580 return print_insn_cris_generic (vma, info, TRUE);
1583 /* Disassemble, prefixing register names with `$'. CRIS v32. */
1586 print_insn_crisv32_with_register_prefix (bfd_vma vma,
1587 disassemble_info *info)
1589 if (info->private_data == NULL
1590 && !cris_parse_disassembler_options (info, cris_dis_v32))
1592 return print_insn_cris_generic (vma, info, TRUE);
1595 /* Disassemble, prefixing register names with `$'.
1596 Common v10 and v32 subset. */
1599 print_insn_crisv10_v32_with_register_prefix (bfd_vma vma,
1600 disassemble_info *info)
1602 if (info->private_data == NULL
1603 && !cris_parse_disassembler_options (info, cris_dis_common_v10_v32))
1605 return print_insn_cris_generic (vma, info, TRUE);
1608 /* Disassemble, no prefixes on register names. CRIS v0..v10. */
1611 print_insn_cris_without_register_prefix (bfd_vma vma,
1612 disassemble_info *info)
1614 if (info->private_data == NULL
1615 && !cris_parse_disassembler_options (info, cris_dis_v0_v10))
1617 return print_insn_cris_generic (vma, info, FALSE);
1620 /* Disassemble, no prefixes on register names. CRIS v32. */
1623 print_insn_crisv32_without_register_prefix (bfd_vma vma,
1624 disassemble_info *info)
1626 if (info->private_data == NULL
1627 && !cris_parse_disassembler_options (info, cris_dis_v32))
1629 return print_insn_cris_generic (vma, info, FALSE);
1632 /* Disassemble, no prefixes on register names.
1633 Common v10 and v32 subset. */
1636 print_insn_crisv10_v32_without_register_prefix (bfd_vma vma,
1637 disassemble_info *info)
1639 if (info->private_data == NULL
1640 && !cris_parse_disassembler_options (info, cris_dis_common_v10_v32))
1642 return print_insn_cris_generic (vma, info, FALSE);
1645 /* Return a disassembler-function that prints registers with a `$' prefix,
1646 or one that prints registers without a prefix.
1647 FIXME: We should improve the solution to avoid the multitude of
1648 functions seen above. */
1651 cris_get_disassembler (bfd *abfd)
1653 /* If there's no bfd in sight, we return what is valid as input in all
1654 contexts if fed back to the assembler: disassembly *with* register
1655 prefix. Unfortunately this will be totally wrong for v32. */
1657 return print_insn_cris_with_register_prefix;
1659 if (bfd_get_symbol_leading_char (abfd) == 0)
1661 if (bfd_get_mach (abfd) == bfd_mach_cris_v32)
1662 return print_insn_crisv32_with_register_prefix;
1663 if (bfd_get_mach (abfd) == bfd_mach_cris_v10_v32)
1664 return print_insn_crisv10_v32_with_register_prefix;
1666 /* We default to v10. This may be specifically specified in the
1667 bfd mach, but is also the default setting. */
1668 return print_insn_cris_with_register_prefix;
1671 if (bfd_get_mach (abfd) == bfd_mach_cris_v32)
1672 return print_insn_crisv32_without_register_prefix;
1673 if (bfd_get_mach (abfd) == bfd_mach_cris_v10_v32)
1674 return print_insn_crisv10_v32_without_register_prefix;
1675 return print_insn_cris_without_register_prefix;
1679 eval: (c-set-style "gnu")