1 /* tc-m32c.c -- Assembler for the Renesas M32C.
2 Copyright (C) 2005-2018 Free Software Foundation, Inc.
5 This file is part of GAS, the GNU Assembler.
7 GAS is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3, or (at your option)
12 GAS is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
25 #include "opcodes/m32c-desc.h"
26 #include "opcodes/m32c-opc.h"
28 #include "elf/common.h"
30 #include "safe-ctype.h"
32 /* Structure to hold all of the different components
33 describing an individual instruction. */
36 const CGEN_INSN * insn;
37 const CGEN_INSN * orig_insn;
40 CGEN_INSN_INT buffer [1];
41 #define INSN_VALUE(buf) (*(buf))
43 unsigned char buffer [CGEN_MAX_INSN_SIZE];
44 #define INSN_VALUE(buf) (buf)
49 fixS * fixups [GAS_CGEN_MAX_FIXUPS];
50 int indices [MAX_OPERAND_INSTANCES];
54 #define rl_for(_insn) (CGEN_ATTR_CGEN_INSN_RL_TYPE_VALUE (&((_insn).insn->base->attrs)))
55 #define relaxable(_insn) (CGEN_ATTR_CGEN_INSN_RELAXABLE_VALUE (&((_insn).insn->base->attrs)))
57 const char comment_chars[] = ";";
58 const char line_comment_chars[] = "#";
59 const char line_separator_chars[] = "|";
60 const char EXP_CHARS[] = "eE";
61 const char FLT_CHARS[] = "dD";
63 #define M32C_SHORTOPTS ""
64 const char * md_shortopts = M32C_SHORTOPTS;
66 /* assembler options */
67 #define OPTION_CPU_M16C (OPTION_MD_BASE)
68 #define OPTION_CPU_M32C (OPTION_MD_BASE + 1)
69 #define OPTION_LINKRELAX (OPTION_MD_BASE + 2)
70 #define OPTION_H_TICK_HEX (OPTION_MD_BASE + 3)
72 struct option md_longopts[] =
74 { "m16c", no_argument, NULL, OPTION_CPU_M16C },
75 { "m32c", no_argument, NULL, OPTION_CPU_M32C },
76 { "relax", no_argument, NULL, OPTION_LINKRELAX },
77 { "h-tick-hex", no_argument, NULL, OPTION_H_TICK_HEX },
78 {NULL, no_argument, NULL, 0}
80 size_t md_longopts_size = sizeof (md_longopts);
84 #define DEFAULT_MACHINE bfd_mach_m16c
85 #define DEFAULT_FLAGS EF_M32C_CPU_M16C
87 static unsigned long m32c_mach = bfd_mach_m16c;
88 static int cpu_mach = (1 << MACH_M16C);
90 static int m32c_relax = 0;
92 /* Flags to set in the elf header */
93 static flagword m32c_flags = DEFAULT_FLAGS;
95 static char default_isa = 1 << (7 - ISA_M16C);
96 static CGEN_BITSET m32c_isa = {1, & default_isa};
99 set_isa (enum isa_attr isa_num)
101 cgen_bitset_set (& m32c_isa, isa_num);
104 static void s_bss (int);
107 md_parse_option (int c, const char * arg ATTRIBUTE_UNUSED)
111 case OPTION_CPU_M16C:
112 m32c_flags = (m32c_flags & ~EF_M32C_CPU_MASK) | EF_M32C_CPU_M16C;
113 m32c_mach = bfd_mach_m16c;
114 cpu_mach = (1 << MACH_M16C);
118 case OPTION_CPU_M32C:
119 m32c_flags = (m32c_flags & ~EF_M32C_CPU_MASK) | EF_M32C_CPU_M32C;
120 m32c_mach = bfd_mach_m32c;
121 cpu_mach = (1 << MACH_M32C);
125 case OPTION_LINKRELAX:
129 case OPTION_H_TICK_HEX:
130 enable_h_tick_hex = 1;
140 md_show_usage (FILE * stream)
142 fprintf (stream, _(" M32C specific command line options:\n"));
146 s_bss (int ignore ATTRIBUTE_UNUSED)
150 temp = get_absolute_expression ();
151 subseg_set (bss_section, (subsegT) temp);
152 demand_empty_rest_of_line ();
155 /* The target specific pseudo-ops which we support. */
156 const pseudo_typeS md_pseudo_table[] =
159 { "3byte", cons, 3 },
168 /* Initialize the `cgen' interface. */
170 /* Set the machine number and endian. */
171 gas_cgen_cpu_desc = m32c_cgen_cpu_open (CGEN_CPU_OPEN_MACHS, cpu_mach,
172 CGEN_CPU_OPEN_ENDIAN,
174 CGEN_CPU_OPEN_ISAS, & m32c_isa,
177 m32c_cgen_init_asm (gas_cgen_cpu_desc);
179 /* This is a callback from cgen to gas to parse operands. */
180 cgen_set_parse_operand_fn (gas_cgen_cpu_desc, gas_cgen_parse_operand);
182 /* Set the ELF flags if desired. */
184 bfd_set_private_flags (stdoutput, m32c_flags);
186 /* Set the machine type */
187 bfd_default_set_arch_mach (stdoutput, bfd_arch_m32c, m32c_mach);
197 if (bfd_get_section_flags (stdoutput, now_seg) & SEC_CODE)
199 /* Pad with nops for objdump. */
200 n_nops = (32 - ((insn_size) % 32)) / 8;
201 for (i = 1; i <= n_nops; i++)
202 md_assemble ((char *) "nop");
207 m32c_start_line_hook (void)
209 #if 0 /* not necessary....handled in the .cpu file */
210 char *s = input_line_pointer;
213 for (s = input_line_pointer ; s && s[0] != '\n'; s++)
217 /* Remove :g suffix. Squeeze out blanks. */
220 for (sg = s - 1; sg && sg >= input_line_pointer; sg--)
226 input_line_pointer += 2;
233 /* Process [[indirect-operands]] in instruction str. */
236 m32c_indirect_operand (char *str)
243 enum indirect_type {none, relative, absolute} ;
244 enum indirect_type indirection [3] = { none, none, none };
245 int brace_n [3] = { 0, 0, 0 };
250 for (s = str; *s; s++)
254 /* [abs] where abs is not a0 or a1 */
255 if (s[1] == '[' && ! (s[2] == 'a' && (s[3] == '0' || s[3] == '1'))
256 && (ISBLANK (s[0]) || s[0] == ','))
257 indirection[operand] = absolute;
258 if (s[0] == ']' && s[1] == ']')
259 indirection[operand] = relative;
260 if (s[0] == '[' && s[1] == '[')
261 indirection[operand] = relative;
264 if (indirection[1] == none && indirection[2] == none)
268 ns_len = strlen (str);
269 new_str = XNEWVEC (char, ns_len);
271 ns_end = ns + ns_len;
273 for (s = str; *s; s++)
278 if (s[0] == '[' && ! brace_n[operand])
280 brace_n[operand] += 1;
281 /* Squeeze [[ to [ if this is an indirect operand. */
282 if (indirection[operand] != none)
286 else if (s[0] == '[' && brace_n[operand])
288 brace_n[operand] += 1;
290 else if (s[0] == ']' && s[1] == ']' && indirection[operand] == relative)
292 s += 1; /* skip one ]. */
293 brace_n[operand] -= 2; /* allow for 2 [. */
295 else if (s[0] == ']' && indirection[operand] == absolute)
297 brace_n[operand] -= 1;
298 continue; /* skip closing ]. */
300 else if (s[0] == ']')
302 brace_n[operand] -= 1;
312 for (operand = 1; operand <= 2; operand++)
313 if (brace_n[operand])
315 fprintf (stderr, "Unmatched [[operand-%d]] %d\n", operand, brace_n[operand]);
318 if (indirection[1] != none && indirection[2] != none)
319 md_assemble ((char *) "src-dest-indirect");
320 else if (indirection[1] != none)
321 md_assemble ((char *) "src-indirect");
322 else if (indirection[2] != none)
323 md_assemble ((char *) "dest-indirect");
325 md_assemble (new_str);
331 md_assemble (char * str)
333 static int last_insn_had_delay_slot = 0;
336 finished_insnS results;
339 if (m32c_mach == bfd_mach_m32c && m32c_indirect_operand (str))
342 /* Initialize GAS's cgen interface for a new instruction. */
343 gas_cgen_init_parse ();
345 insn.insn = m32c_cgen_assemble_insn
346 (gas_cgen_cpu_desc, str, & insn.fields, insn.buffer, & errmsg);
350 as_bad ("%s", errmsg);
354 results.num_fixups = 0;
355 /* Doesn't really matter what we pass for RELAX_P here. */
356 gas_cgen_finish_insn (insn.insn, insn.buffer,
357 CGEN_FIELDS_BITSIZE (& insn.fields), 1, &results);
359 last_insn_had_delay_slot
360 = CGEN_INSN_ATTR_VALUE (insn.insn, CGEN_INSN_DELAY_SLOT);
361 (void) last_insn_had_delay_slot;
362 insn_size = CGEN_INSN_BITSIZE(insn.insn);
364 rl_type = rl_for (insn);
366 /* We have to mark all the jumps, because we need to adjust them
367 when we delete bytes, but we only need to mark the displacements
368 if they're symbolic - if they're not, we've already picked the
369 shortest opcode by now. The linker, however, will still have to
370 check any operands to see if they're the displacement type, since
371 we don't know (nor record) *which* operands are relaxable. */
373 && rl_type != RL_TYPE_NONE
374 && (rl_type == RL_TYPE_JUMP || results.num_fixups)
375 && !relaxable (insn))
378 int addend = results.num_fixups + 16 * insn_size/8;
380 switch (rl_for (insn))
382 case RL_TYPE_JUMP: reloc = BFD_RELOC_M32C_RL_JUMP; break;
383 case RL_TYPE_1ADDR: reloc = BFD_RELOC_M32C_RL_1ADDR; break;
384 case RL_TYPE_2ADDR: reloc = BFD_RELOC_M32C_RL_2ADDR; break;
386 if (insn.insn->base->num == M32C_INSN_JMP16_S
387 || insn.insn->base->num == M32C_INSN_JMP32_S)
390 fix_new (results.frag,
391 results.addr - results.frag->fr_literal,
392 0, abs_section_sym, addend, 0,
397 /* The syntax in the manual says constants begin with '#'.
398 We just ignore it. */
401 md_operand (expressionS * exp)
403 /* In case of a syntax error, escape back to try next syntax combo. */
404 if (exp->X_op == O_absent)
405 gas_cgen_md_operand (exp);
409 md_section_align (segT segment, valueT size)
411 int align = bfd_get_section_alignment (stdoutput, segment);
412 return ((size + (1 << align) - 1) & -(1 << align));
416 md_undefined_symbol (char * name ATTRIBUTE_UNUSED)
421 const relax_typeS md_relax_table[] =
424 1) most positive reach of this state,
425 2) most negative reach of this state,
426 3) how many bytes this mode will have in the variable part of the frag
427 4) which index into the table to try if we can't fit into this one. */
429 /* 0 */ { 0, 0, 0, 0 }, /* unused */
430 /* 1 */ { 0, 0, 0, 0 }, /* marker for "don't know yet" */
432 /* 2 */ { 127, -128, 2, 3 }, /* jcnd16_5.b */
433 /* 3 */ { 32767, -32768, 5, 4 }, /* jcnd16_5.w */
434 /* 4 */ { 0, 0, 6, 0 }, /* jcnd16_5.a */
436 /* 5 */ { 127, -128, 2, 6 }, /* jcnd16.b */
437 /* 6 */ { 32767, -32768, 5, 7 }, /* jcnd16.w */
438 /* 7 */ { 0, 0, 6, 0 }, /* jcnd16.a */
440 /* 8 */ { 8, 1, 1, 9 }, /* jmp16.s */
441 /* 9 */ { 127, -128, 2, 10 }, /* jmp16.b */
442 /* 10 */ { 32767, -32768, 3, 11 }, /* jmp16.w */
443 /* 11 */ { 0, 0, 4, 0 }, /* jmp16.a */
445 /* 12 */ { 127, -128, 2, 13 }, /* jcnd32.b */
446 /* 13 */ { 32767, -32768, 5, 14 }, /* jcnd32.w */
447 /* 14 */ { 0, 0, 6, 0 }, /* jcnd32.a */
449 /* 15 */ { 8, 1, 1, 16 }, /* jmp32.s */
450 /* 16 */ { 127, -128, 2, 17 }, /* jmp32.b */
451 /* 17 */ { 32767, -32768, 3, 18 }, /* jmp32.w */
452 /* 18 */ { 0, 0, 4, 0 }, /* jmp32.a */
454 /* 19 */ { 32767, -32768, 3, 20 }, /* jsr16.w */
455 /* 20 */ { 0, 0, 4, 0 }, /* jsr16.a */
456 /* 21 */ { 32767, -32768, 3, 11 }, /* jsr32.w */
457 /* 22 */ { 0, 0, 4, 0 }, /* jsr32.a */
459 /* 23 */ { 0, 0, 3, 0 }, /* adjnz pc8 */
460 /* 24 */ { 0, 0, 4, 0 }, /* adjnz disp8 pc8 */
461 /* 25 */ { 0, 0, 5, 0 }, /* adjnz disp16 pc8 */
462 /* 26 */ { 0, 0, 6, 0 } /* adjnz disp24 pc8 */
466 M32C_MACRO_JCND16_5_W,
467 M32C_MACRO_JCND16_5_A,
472 /* the digit is the array index of the pcrel byte */
483 int pcrel_aim_offset;
484 } subtype_mappings[] = {
485 /* 0 */ { 0, 0, 0, 0 },
486 /* 1 */ { 0, 0, 0, 0 },
488 /* 2 */ { M32C_INSN_JCND16_5, 2, -M32C_MACRO_JCND16_5_A, 1 },
489 /* 3 */ { -M32C_MACRO_JCND16_5_W, 5, -M32C_MACRO_JCND16_5_A, 4 },
490 /* 4 */ { -M32C_MACRO_JCND16_5_A, 6, -M32C_MACRO_JCND16_5_A, 0 },
492 /* 5 */ { M32C_INSN_JCND16, 3, -M32C_MACRO_JCND16_A, 1 },
493 /* 6 */ { -M32C_MACRO_JCND16_W, 6, -M32C_MACRO_JCND16_A, 4 },
494 /* 7 */ { -M32C_MACRO_JCND16_A, 7, -M32C_MACRO_JCND16_A, 0 },
496 /* 8 */ { M32C_INSN_JMP16_S, 1, M32C_INSN_JMP16_A, 0 },
497 /* 9 */ { M32C_INSN_JMP16_B, 2, M32C_INSN_JMP16_A, 1 },
498 /* 10 */ { M32C_INSN_JMP16_W, 3, M32C_INSN_JMP16_A, 2 },
499 /* 11 */ { M32C_INSN_JMP16_A, 4, M32C_INSN_JMP16_A, 0 },
501 /* 12 */ { M32C_INSN_JCND32, 2, -M32C_MACRO_JCND32_A, 1 },
502 /* 13 */ { -M32C_MACRO_JCND32_W, 5, -M32C_MACRO_JCND32_A, 4 },
503 /* 14 */ { -M32C_MACRO_JCND32_A, 6, -M32C_MACRO_JCND32_A, 0 },
505 /* 15 */ { M32C_INSN_JMP32_S, 1, M32C_INSN_JMP32_A, 0 },
506 /* 16 */ { M32C_INSN_JMP32_B, 2, M32C_INSN_JMP32_A, 1 },
507 /* 17 */ { M32C_INSN_JMP32_W, 3, M32C_INSN_JMP32_A, 2 },
508 /* 18 */ { M32C_INSN_JMP32_A, 4, M32C_INSN_JMP32_A, 0 },
510 /* 19 */ { M32C_INSN_JSR16_W, 3, M32C_INSN_JSR16_A, 2 },
511 /* 20 */ { M32C_INSN_JSR16_A, 4, M32C_INSN_JSR16_A, 0 },
512 /* 21 */ { M32C_INSN_JSR32_W, 3, M32C_INSN_JSR32_A, 2 },
513 /* 22 */ { M32C_INSN_JSR32_A, 4, M32C_INSN_JSR32_A, 0 },
515 /* 23 */ { -M32C_MACRO_ADJNZ_2, 3, -M32C_MACRO_ADJNZ_2, 0 },
516 /* 24 */ { -M32C_MACRO_ADJNZ_3, 4, -M32C_MACRO_ADJNZ_3, 0 },
517 /* 25 */ { -M32C_MACRO_ADJNZ_4, 5, -M32C_MACRO_ADJNZ_4, 0 },
518 /* 26 */ { -M32C_MACRO_ADJNZ_5, 6, -M32C_MACRO_ADJNZ_5, 0 }
520 #define NUM_MAPPINGS (sizeof (subtype_mappings) / sizeof (subtype_mappings[0]))
523 m32c_prepare_relax_scan (fragS *fragP, offsetT *aim, relax_substateT this_state)
525 symbolS *symbolP = fragP->fr_symbol;
526 if (symbolP && !S_IS_DEFINED (symbolP))
528 /* Adjust for m32c pcrel not being relative to the next opcode. */
529 *aim += subtype_mappings[this_state].pcrel_aim_offset;
533 insn_to_subtype (int inum, const CGEN_INSN *insn)
538 && (strncmp (insn->base->mnemonic, "adjnz", 5) == 0
539 || strncmp (insn->base->mnemonic, "sbjnz", 5) == 0))
541 i = 23 + insn->base->bitsize/8 - 3;
542 /*printf("mapping %d used for %s\n", i, insn->base->mnemonic);*/
546 for (i=0; i<NUM_MAPPINGS; i++)
547 if (inum == subtype_mappings[i].insn)
549 /*printf("mapping %d used\n", i);*/
555 /* Return an initial guess of the length by which a fragment must grow to
556 hold a branch to reach its destination.
557 Also updates fr_type/fr_subtype as necessary.
559 Called just before doing relaxation.
560 Any symbol that is now undefined will not become defined.
561 The guess for fr_var is ACTUALLY the growth beyond fr_fix.
562 Whatever we do to grow fr_fix or fr_var contributes to our returned value.
563 Although it may not be explicit in the frag, pretend fr_var starts with a
567 md_estimate_size_before_relax (fragS * fragP, segT segment ATTRIBUTE_UNUSED)
569 int where = fragP->fr_opcode - fragP->fr_literal;
571 if (fragP->fr_subtype == 1)
572 fragP->fr_subtype = insn_to_subtype (fragP->fr_cgen.insn->base->num, fragP->fr_cgen.insn);
574 if (S_GET_SEGMENT (fragP->fr_symbol) != segment)
578 new_insn = subtype_mappings[fragP->fr_subtype].insn_for_extern;
579 fragP->fr_subtype = insn_to_subtype (new_insn, 0);
582 if (fragP->fr_cgen.insn->base
583 && fragP->fr_cgen.insn->base->num
584 != subtype_mappings[fragP->fr_subtype].insn
585 && subtype_mappings[fragP->fr_subtype].insn > 0)
587 int new_insn= subtype_mappings[fragP->fr_subtype].insn;
590 fragP->fr_cgen.insn = (fragP->fr_cgen.insn
591 - fragP->fr_cgen.insn->base->num
596 return subtype_mappings[fragP->fr_subtype].bytes - (fragP->fr_fix - where);
599 /* *fragP has been relaxed to its final size, and now needs to have
600 the bytes inside it modified to conform to the new size.
602 Called after relaxation is finished.
603 fragP->fr_type == rs_machine_dependent.
604 fragP->fr_subtype is the subtype of what the address relaxed to. */
607 target_address_for (fragS *frag)
609 int rv = frag->fr_offset;
610 symbolS *sym = frag->fr_symbol;
613 rv += S_GET_VALUE (sym);
615 /*printf("target_address_for returns %d\n", rv);*/
620 md_convert_frag (bfd * abfd ATTRIBUTE_UNUSED,
621 segT sec ATTRIBUTE_UNUSED,
622 fragS * fragP ATTRIBUTE_UNUSED)
626 int where = fragP->fr_opcode - fragP->fr_literal;
627 int rl_where = fragP->fr_opcode - fragP->fr_literal;
628 unsigned char *op = (unsigned char *)fragP->fr_opcode;
631 addend = target_address_for (fragP) - (fragP->fr_address + where);
633 fragP->fr_fix = where + subtype_mappings[fragP->fr_subtype].bytes;
635 switch (subtype_mappings[fragP->fr_subtype].insn)
637 case M32C_INSN_JCND16_5:
639 operand = M32C_OPERAND_LAB_8_8;
643 case -M32C_MACRO_JCND16_5_W:
648 op[4] = (addend - 3) >> 8;
649 operand = M32C_OPERAND_LAB_8_16;
654 case -M32C_MACRO_JCND16_5_A:
658 operand = M32C_OPERAND_LAB_8_24;
664 case M32C_INSN_JCND16:
666 operand = M32C_OPERAND_LAB_16_8;
670 case -M32C_MACRO_JCND16_W:
675 op[5] = (addend - 4) >> 8;
676 operand = M32C_OPERAND_LAB_8_16;
681 case -M32C_MACRO_JCND16_A:
685 operand = M32C_OPERAND_LAB_8_24;
690 case M32C_INSN_JMP16_S:
691 op[0] = 0x60 | ((addend-2) & 0x07);
692 operand = M32C_OPERAND_LAB_5_3;
696 case M32C_INSN_JMP16_B:
699 operand = M32C_OPERAND_LAB_8_8;
703 case M32C_INSN_JMP16_W:
706 op[2] = (addend - 1) >> 8;
707 operand = M32C_OPERAND_LAB_8_16;
711 case M32C_INSN_JMP16_A:
716 operand = M32C_OPERAND_LAB_8_24;
720 case M32C_INSN_JCND32:
722 operand = M32C_OPERAND_LAB_8_8;
726 case -M32C_MACRO_JCND32_W:
731 op[4] = (addend - 3) >> 8;
732 operand = M32C_OPERAND_LAB_8_16;
737 case -M32C_MACRO_JCND32_A:
741 operand = M32C_OPERAND_LAB_8_24;
746 case M32C_INSN_JMP32_S:
747 addend = ((addend-2) & 0x07);
748 op[0] = 0x4a | (addend & 0x01) | ((addend << 3) & 0x30);
749 operand = M32C_OPERAND_LAB32_JMP_S;
753 case M32C_INSN_JMP32_B:
756 operand = M32C_OPERAND_LAB_8_8;
760 case M32C_INSN_JMP32_W:
763 op[2] = (addend - 1) >> 8;
764 operand = M32C_OPERAND_LAB_8_16;
768 case M32C_INSN_JMP32_A:
773 operand = M32C_OPERAND_LAB_8_24;
778 case M32C_INSN_JSR16_W:
781 op[2] = (addend - 1) >> 8;
782 operand = M32C_OPERAND_LAB_8_16;
786 case M32C_INSN_JSR16_A:
791 operand = M32C_OPERAND_LAB_8_24;
795 case M32C_INSN_JSR32_W:
798 op[2] = (addend - 1) >> 8;
799 operand = M32C_OPERAND_LAB_8_16;
803 case M32C_INSN_JSR32_A:
808 operand = M32C_OPERAND_LAB_8_24;
812 case -M32C_MACRO_ADJNZ_2:
815 operand = M32C_OPERAND_LAB_16_8;
817 case -M32C_MACRO_ADJNZ_3:
820 operand = M32C_OPERAND_LAB_24_8;
822 case -M32C_MACRO_ADJNZ_4:
825 operand = M32C_OPERAND_LAB_32_8;
827 case -M32C_MACRO_ADJNZ_5:
830 operand = M32C_OPERAND_LAB_40_8;
834 printf("\nHey! Need more opcode converters! missing: %d %s\n\n",
836 fragP->fr_cgen.insn->base->name);
842 if (operand != M32C_OPERAND_LAB_8_24)
843 fragP->fr_offset = (fragP->fr_address + where);
847 0, abs_section_sym, rl_addend, 0,
848 BFD_RELOC_M32C_RL_JUMP);
851 if (S_GET_SEGMENT (fragP->fr_symbol) != sec
852 || operand == M32C_OPERAND_LAB_8_24
853 || (m32c_relax && (operand != M32C_OPERAND_LAB_5_3
854 && operand != M32C_OPERAND_LAB32_JMP_S)))
856 gas_assert (fragP->fr_cgen.insn != 0);
857 gas_cgen_record_fixup (fragP,
860 (fragP->fr_fix - where) * 8,
861 cgen_operand_lookup_by_num (gas_cgen_cpu_desc,
863 fragP->fr_cgen.opinfo,
869 /* Functions concerning relocs. */
871 /* The location from which a PC relative jump should be calculated,
872 given a PC relative reloc. */
875 md_pcrel_from_section (fixS * fixP, segT sec)
877 if (fixP->fx_addsy != (symbolS *) NULL
878 && (! S_IS_DEFINED (fixP->fx_addsy)
879 || S_GET_SEGMENT (fixP->fx_addsy) != sec))
880 /* The symbol is undefined (or is defined but not in this section).
881 Let the linker figure it out. */
884 return (fixP->fx_frag->fr_address + fixP->fx_where);
887 /* Return the bfd reloc type for OPERAND of INSN at fixup FIXP.
888 Returns BFD_RELOC_NONE if no reloc type can be found.
889 *FIXP may be modified if desired. */
891 bfd_reloc_code_real_type
892 md_cgen_lookup_reloc (const CGEN_INSN * insn ATTRIBUTE_UNUSED,
893 const CGEN_OPERAND * operand,
894 fixS * fixP ATTRIBUTE_UNUSED)
896 static const struct op_reloc {
897 /* A CGEN operand type that can be a relocatable expression. */
898 CGEN_OPERAND_TYPE operand;
900 /* The appropriate BFD reloc type to use for that. */
901 bfd_reloc_code_real_type reloc;
903 /* The offset from the start of the instruction to the field to be
904 relocated, in bytes. */
906 } op_reloc_table[] = {
908 /* PC-REL relocs for 8-bit fields. */
909 { M32C_OPERAND_LAB_8_8, BFD_RELOC_8_PCREL, 1 },
910 { M32C_OPERAND_LAB_16_8, BFD_RELOC_8_PCREL, 2 },
911 { M32C_OPERAND_LAB_24_8, BFD_RELOC_8_PCREL, 3 },
912 { M32C_OPERAND_LAB_32_8, BFD_RELOC_8_PCREL, 4 },
913 { M32C_OPERAND_LAB_40_8, BFD_RELOC_8_PCREL, 5 },
915 /* PC-REL relocs for 16-bit fields. */
916 { M32C_OPERAND_LAB_8_16, BFD_RELOC_16_PCREL, 1 },
918 /* Absolute relocs for 8-bit fields. */
919 { M32C_OPERAND_IMM_8_QI, BFD_RELOC_8, 1 },
920 { M32C_OPERAND_IMM_16_QI, BFD_RELOC_8, 2 },
921 { M32C_OPERAND_IMM_24_QI, BFD_RELOC_8, 3 },
922 { M32C_OPERAND_IMM_32_QI, BFD_RELOC_8, 4 },
923 { M32C_OPERAND_IMM_40_QI, BFD_RELOC_8, 5 },
924 { M32C_OPERAND_IMM_48_QI, BFD_RELOC_8, 6 },
925 { M32C_OPERAND_IMM_56_QI, BFD_RELOC_8, 7 },
926 { M32C_OPERAND_DSP_8_S8, BFD_RELOC_8, 1 },
927 { M32C_OPERAND_DSP_16_S8, BFD_RELOC_8, 2 },
928 { M32C_OPERAND_DSP_24_S8, BFD_RELOC_8, 3 },
929 { M32C_OPERAND_DSP_32_S8, BFD_RELOC_8, 4 },
930 { M32C_OPERAND_DSP_40_S8, BFD_RELOC_8, 5 },
931 { M32C_OPERAND_DSP_48_S8, BFD_RELOC_8, 6 },
932 { M32C_OPERAND_DSP_8_U8, BFD_RELOC_8, 1 },
933 { M32C_OPERAND_DSP_16_U8, BFD_RELOC_8, 2 },
934 { M32C_OPERAND_DSP_24_U8, BFD_RELOC_8, 3 },
935 { M32C_OPERAND_DSP_32_U8, BFD_RELOC_8, 4 },
936 { M32C_OPERAND_DSP_40_U8, BFD_RELOC_8, 5 },
937 { M32C_OPERAND_DSP_48_U8, BFD_RELOC_8, 6 },
938 { M32C_OPERAND_BITBASE32_16_S11_UNPREFIXED, BFD_RELOC_8, 2 },
939 { M32C_OPERAND_BITBASE32_16_U11_UNPREFIXED, BFD_RELOC_8, 2 },
940 { M32C_OPERAND_BITBASE32_24_S11_PREFIXED, BFD_RELOC_8, 3 },
941 { M32C_OPERAND_BITBASE32_24_U11_PREFIXED, BFD_RELOC_8, 3 },
943 /* Absolute relocs for 16-bit fields. */
944 { M32C_OPERAND_IMM_8_HI, BFD_RELOC_16, 1 },
945 { M32C_OPERAND_IMM_16_HI, BFD_RELOC_16, 2 },
946 { M32C_OPERAND_IMM_24_HI, BFD_RELOC_16, 3 },
947 { M32C_OPERAND_IMM_32_HI, BFD_RELOC_16, 4 },
948 { M32C_OPERAND_IMM_40_HI, BFD_RELOC_16, 5 },
949 { M32C_OPERAND_IMM_48_HI, BFD_RELOC_16, 6 },
950 { M32C_OPERAND_IMM_56_HI, BFD_RELOC_16, 7 },
951 { M32C_OPERAND_IMM_64_HI, BFD_RELOC_16, 8 },
952 { M32C_OPERAND_DSP_16_S16, BFD_RELOC_16, 2 },
953 { M32C_OPERAND_DSP_24_S16, BFD_RELOC_16, 3 },
954 { M32C_OPERAND_DSP_32_S16, BFD_RELOC_16, 4 },
955 { M32C_OPERAND_DSP_40_S16, BFD_RELOC_16, 5 },
956 { M32C_OPERAND_DSP_8_U16, BFD_RELOC_16, 1 },
957 { M32C_OPERAND_DSP_16_U16, BFD_RELOC_16, 2 },
958 { M32C_OPERAND_DSP_24_U16, BFD_RELOC_16, 3 },
959 { M32C_OPERAND_DSP_32_U16, BFD_RELOC_16, 4 },
960 { M32C_OPERAND_DSP_40_U16, BFD_RELOC_16, 5 },
961 { M32C_OPERAND_DSP_48_U16, BFD_RELOC_16, 6 },
962 { M32C_OPERAND_BITBASE32_16_S19_UNPREFIXED, BFD_RELOC_16, 2 },
963 { M32C_OPERAND_BITBASE32_16_U19_UNPREFIXED, BFD_RELOC_16, 2 },
964 { M32C_OPERAND_BITBASE32_24_S19_PREFIXED, BFD_RELOC_16, 3 },
965 { M32C_OPERAND_BITBASE32_24_U19_PREFIXED, BFD_RELOC_16, 3 },
967 /* Absolute relocs for 24-bit fields. */
968 { M32C_OPERAND_LAB_8_24, BFD_RELOC_24, 1 },
969 { M32C_OPERAND_DSP_8_S24, BFD_RELOC_24, 1 },
970 { M32C_OPERAND_DSP_8_U24, BFD_RELOC_24, 1 },
971 { M32C_OPERAND_DSP_16_U24, BFD_RELOC_24, 2 },
972 { M32C_OPERAND_DSP_24_U24, BFD_RELOC_24, 3 },
973 { M32C_OPERAND_DSP_32_U24, BFD_RELOC_24, 4 },
974 { M32C_OPERAND_DSP_40_U24, BFD_RELOC_24, 5 },
975 { M32C_OPERAND_DSP_48_U24, BFD_RELOC_24, 6 },
976 { M32C_OPERAND_DSP_16_U20, BFD_RELOC_24, 2 },
977 { M32C_OPERAND_DSP_24_U20, BFD_RELOC_24, 3 },
978 { M32C_OPERAND_DSP_32_U20, BFD_RELOC_24, 4 },
979 { M32C_OPERAND_BITBASE32_16_U27_UNPREFIXED, BFD_RELOC_24, 2 },
980 { M32C_OPERAND_BITBASE32_24_U27_PREFIXED, BFD_RELOC_24, 3 },
982 /* Absolute relocs for 32-bit fields. */
983 { M32C_OPERAND_IMM_16_SI, BFD_RELOC_32, 2 },
984 { M32C_OPERAND_IMM_24_SI, BFD_RELOC_32, 3 },
985 { M32C_OPERAND_IMM_32_SI, BFD_RELOC_32, 4 },
986 { M32C_OPERAND_IMM_40_SI, BFD_RELOC_32, 5 },
992 for (i = ARRAY_SIZE (op_reloc_table); --i >= 0; )
994 const struct op_reloc *or = &op_reloc_table[i];
996 if (or->operand == operand->type)
998 fixP->fx_where += or->offset;
999 fixP->fx_size -= or->offset;
1001 if (fixP->fx_cgen.opinfo
1002 && fixP->fx_cgen.opinfo != BFD_RELOC_NONE)
1003 return fixP->fx_cgen.opinfo;
1011 "Error: tc-m32c.c:md_cgen_lookup_reloc Unimplemented relocation for operand %s\n",
1014 return BFD_RELOC_NONE;
1018 m32c_cons_fix_new (fragS * frag,
1022 bfd_reloc_code_real_type type)
1030 type = BFD_RELOC_16;
1033 type = BFD_RELOC_24;
1037 type = BFD_RELOC_32;
1040 type = BFD_RELOC_64;
1044 fix_new_exp (frag, where, (int) size, exp, 0, type);
1048 m32c_apply_fix (struct fix *f, valueT *t, segT s)
1050 if (f->fx_r_type == BFD_RELOC_M32C_RL_JUMP
1051 || f->fx_r_type == BFD_RELOC_M32C_RL_1ADDR
1052 || f->fx_r_type == BFD_RELOC_M32C_RL_2ADDR)
1054 gas_cgen_md_apply_fix (f, t, s);
1058 tc_gen_reloc (asection *sec, fixS *fx)
1060 if (fx->fx_r_type == BFD_RELOC_M32C_RL_JUMP
1061 || fx->fx_r_type == BFD_RELOC_M32C_RL_1ADDR
1062 || fx->fx_r_type == BFD_RELOC_M32C_RL_2ADDR)
1066 reloc = XNEW (arelent);
1068 reloc->sym_ptr_ptr = XNEW (asymbol *);
1069 *reloc->sym_ptr_ptr = symbol_get_bfdsym (fx->fx_addsy);
1070 reloc->address = fx->fx_frag->fr_address + fx->fx_where;
1071 reloc->howto = bfd_reloc_type_lookup (stdoutput, fx->fx_r_type);
1072 reloc->addend = fx->fx_offset;
1076 return gas_cgen_tc_gen_reloc (sec, fx);
1079 /* See whether we need to force a relocation into the output file.
1080 This is used to force out switch and PC relative relocations when
1084 m32c_force_relocation (fixS * fixp)
1086 int reloc = fixp->fx_r_type;
1088 if (reloc > (int)BFD_RELOC_UNUSED)
1090 reloc -= (int)BFD_RELOC_UNUSED;
1093 case M32C_OPERAND_DSP_32_S16:
1094 case M32C_OPERAND_DSP_32_U16:
1095 case M32C_OPERAND_IMM_32_HI:
1096 case M32C_OPERAND_DSP_16_S16:
1097 case M32C_OPERAND_DSP_16_U16:
1098 case M32C_OPERAND_IMM_16_HI:
1099 case M32C_OPERAND_DSP_24_S16:
1100 case M32C_OPERAND_DSP_24_U16:
1101 case M32C_OPERAND_IMM_24_HI:
1104 /* If we're doing linker relaxing, we need to keep all the
1105 pc-relative jumps in case we need to fix them due to
1106 deleted bytes between the jump and its destination. */
1107 case M32C_OPERAND_LAB_8_8:
1108 case M32C_OPERAND_LAB_8_16:
1109 case M32C_OPERAND_LAB_8_24:
1110 case M32C_OPERAND_LAB_16_8:
1111 case M32C_OPERAND_LAB_24_8:
1112 case M32C_OPERAND_LAB_32_8:
1113 case M32C_OPERAND_LAB_40_8:
1122 switch (fixp->fx_r_type)
1127 case BFD_RELOC_M32C_RL_JUMP:
1128 case BFD_RELOC_M32C_RL_1ADDR:
1129 case BFD_RELOC_M32C_RL_2ADDR:
1130 case BFD_RELOC_8_PCREL:
1131 case BFD_RELOC_16_PCREL:
1139 return generic_force_reloc (fixp);
1142 /* Write a value out to the object file, using the appropriate endianness. */
1145 md_number_to_chars (char * buf, valueT val, int n)
1147 number_to_chars_littleendian (buf, val, n);
1150 /* Turn a string in input_line_pointer into a floating point constant of type
1151 type, and store the appropriate bytes in *litP. The number of LITTLENUMS
1152 emitted is stored in *sizeP . An error message is returned, or NULL on OK. */
1154 /* Equal to MAX_PRECISION in atof-ieee.c. */
1155 #define MAX_LITTLENUMS 6
1158 md_atof (int type, char * litP, int * sizeP)
1160 return ieee_md_atof (type, litP, sizeP, TRUE);
1164 m32c_fix_adjustable (fixS * fixP)
1167 if (fixP->fx_addsy == NULL)
1170 /* We need the symbol name for the VTABLE entries. */
1171 reloc = fixP->fx_r_type;
1172 if (reloc > (int)BFD_RELOC_UNUSED)
1174 reloc -= (int)BFD_RELOC_UNUSED;
1177 case M32C_OPERAND_DSP_32_S16:
1178 case M32C_OPERAND_DSP_32_U16:
1179 case M32C_OPERAND_IMM_32_HI:
1180 case M32C_OPERAND_DSP_16_S16:
1181 case M32C_OPERAND_DSP_16_U16:
1182 case M32C_OPERAND_IMM_16_HI:
1183 case M32C_OPERAND_DSP_24_S16:
1184 case M32C_OPERAND_DSP_24_U16:
1185 case M32C_OPERAND_IMM_24_HI:
1191 if (fixP->fx_r_type == BFD_RELOC_16)
1195 /* Do not adjust relocations involving symbols in merged sections.
1197 A reloc patching in the value of some symbol S plus some addend A
1198 can be produced in different ways:
1200 1) It might simply be a reference to the data at S + A. Clearly,
1201 if linker merging shift that data around, the value patched in
1202 by the reloc needs to be adjusted accordingly.
1204 2) Or, it might be a reference to S, with A added in as a constant
1205 bias. For example, given code like this:
1211 it would be reasonable for the compiler to rearrange the array
1212 reference to something like:
1216 and emit assembly code that refers to S - (8 * sizeof (int)),
1217 so the subtraction is done entirely at compile-time. In this
1218 case, the reloc's addend A would be -(8 * sizeof (int)), and
1219 shifting around code or data at S + A should not affect the
1220 reloc: the reloc isn't referring to that code or data at all.
1222 The linker has no way of knowing which case it has in hand. So,
1223 to disambiguate, we have the linker always treat reloc addends as
1224 in case 2): they're constants that should be simply added to the
1225 symbol value, just like the reloc says. And we express case 1)
1226 in different way: we have the compiler place a label at the real
1227 target, and reference that label with an addend of zero. (The
1228 compiler is unlikely to reference code using a label plus an
1229 offset anyway, since it doesn't know the sizes of the
1232 The simplification being done by gas/write.c:adjust_reloc_syms,
1233 however, turns the explicit-label usage into the label-plus-
1234 offset usage, re-introducing the ambiguity the compiler avoided.
1235 So we need to disable that simplification for symbols referring
1238 This only affects object size a little bit. */
1239 if (S_GET_SEGMENT (fixP->fx_addsy)->flags & SEC_MERGE)
1248 /* Worker function for m32c_is_colon_insn(). */
1250 restore_colon (char *next_i_l_p, char *nul_char)
1252 /* Restore the colon, and advance input_line_pointer to
1253 the end of the new symbol. */
1254 *input_line_pointer = *nul_char;
1255 input_line_pointer = next_i_l_p;
1256 *nul_char = *next_i_l_p;
1261 /* Determines if the symbol starting at START and ending in
1262 a colon that was at the location pointed to by INPUT_LINE_POINTER
1263 (but which has now been replaced bu a NUL) is in fact an
1264 :Z, :S, :Q, or :G suffix.
1265 If it is, then it restores the colon, advances INPUT_LINE_POINTER
1266 to the real end of the instruction/symbol, saves the char there to
1267 NUL_CHAR and pokes a NUL, and returns 1. Otherwise it returns 0. */
1269 m32c_is_colon_insn (char *start ATTRIBUTE_UNUSED, char *nul_char)
1271 char * i_l_p = input_line_pointer;
1273 if (*nul_char == '"')
1276 /* Check to see if the text following the colon is 'G' */
1277 if (TOLOWER (i_l_p[1]) == 'g' && (i_l_p[2] == ' ' || i_l_p[2] == '\t'))
1278 return restore_colon (i_l_p + 2, nul_char);
1280 /* Check to see if the text following the colon is 'Q' */
1281 if (TOLOWER (i_l_p[1]) == 'q' && (i_l_p[2] == ' ' || i_l_p[2] == '\t'))
1282 return restore_colon (i_l_p + 2, nul_char);
1284 /* Check to see if the text following the colon is 'S' */
1285 if (TOLOWER (i_l_p[1]) == 's' && (i_l_p[2] == ' ' || i_l_p[2] == '\t'))
1286 return restore_colon (i_l_p + 2, nul_char);
1288 /* Check to see if the text following the colon is 'Z' */
1289 if (TOLOWER (i_l_p[1]) == 'z' && (i_l_p[2] == ' ' || i_l_p[2] == '\t'))
1290 return restore_colon (i_l_p + 2, nul_char);