1 /* tc-m32c.c -- Assembler for the Renesas M32C.
2 Copyright (C) 2005, 2006, 2007 Free Software Foundation.
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 GAS; see the file COPYING. If not, write to
19 the Free Software Foundation, 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
25 #include "opcodes/m32c-desc.h"
26 #include "opcodes/m32c-opc.h"
28 #include "elf/common.h"
31 #include "safe-ctype.h"
33 /* Structure to hold all of the different components
34 describing an individual instruction. */
37 const CGEN_INSN * insn;
38 const CGEN_INSN * orig_insn;
41 CGEN_INSN_INT buffer [1];
42 #define INSN_VALUE(buf) (*(buf))
44 unsigned char buffer [CGEN_MAX_INSN_SIZE];
45 #define INSN_VALUE(buf) (buf)
50 fixS * fixups [GAS_CGEN_MAX_FIXUPS];
51 int indices [MAX_OPERAND_INSTANCES];
55 #define rl_for(_insn) (CGEN_ATTR_CGEN_INSN_RL_TYPE_VALUE (&((_insn).insn->base->attrs)))
56 #define relaxable(_insn) (CGEN_ATTR_CGEN_INSN_RELAXABLE_VALUE (&((_insn).insn->base->attrs)))
58 const char comment_chars[] = ";";
59 const char line_comment_chars[] = "#";
60 const char line_separator_chars[] = "|";
61 const char EXP_CHARS[] = "eE";
62 const char FLT_CHARS[] = "dD";
64 #define M32C_SHORTOPTS ""
65 const char * md_shortopts = M32C_SHORTOPTS;
67 /* assembler options */
68 #define OPTION_CPU_M16C (OPTION_MD_BASE)
69 #define OPTION_CPU_M32C (OPTION_MD_BASE + 1)
70 #define OPTION_LINKRELAX (OPTION_MD_BASE + 2)
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 {NULL, no_argument, NULL, 0}
79 size_t md_longopts_size = sizeof (md_longopts);
83 #define DEFAULT_MACHINE bfd_mach_m16c
84 #define DEFAULT_FLAGS EF_M32C_CPU_M16C
86 static unsigned long m32c_mach = bfd_mach_m16c;
87 static int cpu_mach = (1 << MACH_M16C);
89 static int m32c_relax = 0;
91 /* Flags to set in the elf header */
92 static flagword m32c_flags = DEFAULT_FLAGS;
94 static char default_isa = 1 << (7 - ISA_M16C);
95 static CGEN_BITSET m32c_isa = {1, & default_isa};
98 set_isa (enum isa_attr isa_num)
100 cgen_bitset_set (& m32c_isa, isa_num);
103 static void s_bss (int);
106 md_parse_option (int c, char * arg ATTRIBUTE_UNUSED)
110 case OPTION_CPU_M16C:
111 m32c_flags = (m32c_flags & ~EF_M32C_CPU_MASK) | EF_M32C_CPU_M16C;
112 m32c_mach = bfd_mach_m16c;
113 cpu_mach = (1 << MACH_M16C);
117 case OPTION_CPU_M32C:
118 m32c_flags = (m32c_flags & ~EF_M32C_CPU_MASK) | EF_M32C_CPU_M32C;
119 m32c_mach = bfd_mach_m32c;
120 cpu_mach = (1 << MACH_M32C);
124 case OPTION_LINKRELAX:
135 md_show_usage (FILE * stream)
137 fprintf (stream, _(" M32C specific command line options:\n"));
141 s_bss (int ignore ATTRIBUTE_UNUSED)
145 temp = get_absolute_expression ();
146 subseg_set (bss_section, (subsegT) temp);
147 demand_empty_rest_of_line ();
150 /* The target specific pseudo-ops which we support. */
151 const pseudo_typeS md_pseudo_table[] =
154 { "3byte", cons, 3 },
163 /* Initialize the `cgen' interface. */
165 /* Set the machine number and endian. */
166 gas_cgen_cpu_desc = m32c_cgen_cpu_open (CGEN_CPU_OPEN_MACHS, cpu_mach,
167 CGEN_CPU_OPEN_ENDIAN,
169 CGEN_CPU_OPEN_ISAS, & m32c_isa,
172 m32c_cgen_init_asm (gas_cgen_cpu_desc);
174 /* This is a callback from cgen to gas to parse operands. */
175 cgen_set_parse_operand_fn (gas_cgen_cpu_desc, gas_cgen_parse_operand);
177 /* Set the ELF flags if desired. */
179 bfd_set_private_flags (stdoutput, m32c_flags);
181 /* Set the machine type */
182 bfd_default_set_arch_mach (stdoutput, bfd_arch_m32c, m32c_mach);
192 if (bfd_get_section_flags (stdoutput, now_seg) & SEC_CODE)
194 /* Pad with nops for objdump. */
195 n_nops = (32 - ((insn_size) % 32)) / 8;
196 for (i = 1; i <= n_nops; i++)
202 m32c_start_line_hook (void)
204 #if 0 /* not necessary....handled in the .cpu file */
205 char *s = input_line_pointer;
208 for (s = input_line_pointer ; s && s[0] != '\n'; s++)
212 /* Remove :g suffix. Squeeze out blanks. */
215 for (sg = s - 1; sg && sg >= input_line_pointer; sg--)
221 input_line_pointer += 2;
228 /* Process [[indirect-operands]] in instruction str. */
231 m32c_indirect_operand (char *str)
238 enum indirect_type {none, relative, absolute} ;
239 enum indirect_type indirection [3] = { none, none, none };
240 int brace_n [3] = { 0, 0, 0 };
245 for (s = str; *s; s++)
249 /* [abs] where abs is not a0 or a1 */
250 if (s[1] == '[' && ! (s[2] == 'a' && (s[3] == '0' || s[3] == '1'))
251 && (ISBLANK (s[0]) || s[0] == ','))
252 indirection[operand] = absolute;
253 if (s[0] == ']' && s[1] == ']')
254 indirection[operand] = relative;
255 if (s[0] == '[' && s[1] == '[')
256 indirection[operand] = relative;
259 if (indirection[1] == none && indirection[2] == none)
263 ns_len = strlen (str);
264 new_str = (char*) xmalloc (ns_len);
266 ns_end = ns + ns_len;
268 for (s = str; *s; s++)
273 if (s[0] == '[' && ! brace_n[operand])
275 brace_n[operand] += 1;
276 /* Squeeze [[ to [ if this is an indirect operand. */
277 if (indirection[operand] != none)
281 else if (s[0] == '[' && brace_n[operand])
283 brace_n[operand] += 1;
285 else if (s[0] == ']' && s[1] == ']' && indirection[operand] == relative)
287 s += 1; /* skip one ]. */
288 brace_n[operand] -= 2; /* allow for 2 [. */
290 else if (s[0] == ']' && indirection[operand] == absolute)
292 brace_n[operand] -= 1;
293 continue; /* skip closing ]. */
295 else if (s[0] == ']')
297 brace_n[operand] -= 1;
307 for (operand = 1; operand <= 2; operand++)
308 if (brace_n[operand])
310 fprintf (stderr, "Unmatched [[operand-%d]] %d\n", operand, brace_n[operand]);
313 if (indirection[1] != none && indirection[2] != none)
314 md_assemble ("src-dest-indirect");
315 else if (indirection[1] != none)
316 md_assemble ("src-indirect");
317 else if (indirection[2] != none)
318 md_assemble ("dest-indirect");
320 md_assemble (new_str);
326 md_assemble (char * str)
328 static int last_insn_had_delay_slot = 0;
331 finished_insnS results;
334 if (m32c_mach == bfd_mach_m32c && m32c_indirect_operand (str))
337 /* Initialize GAS's cgen interface for a new instruction. */
338 gas_cgen_init_parse ();
340 insn.insn = m32c_cgen_assemble_insn
341 (gas_cgen_cpu_desc, str, & insn.fields, insn.buffer, & errmsg);
345 as_bad ("%s", errmsg);
349 results.num_fixups = 0;
350 /* Doesn't really matter what we pass for RELAX_P here. */
351 gas_cgen_finish_insn (insn.insn, insn.buffer,
352 CGEN_FIELDS_BITSIZE (& insn.fields), 1, &results);
354 last_insn_had_delay_slot
355 = CGEN_INSN_ATTR_VALUE (insn.insn, CGEN_INSN_DELAY_SLOT);
356 insn_size = CGEN_INSN_BITSIZE(insn.insn);
358 rl_type = rl_for (insn);
360 /* We have to mark all the jumps, because we need to adjust them
361 when we delete bytes, but we only need to mark the displacements
362 if they're symbolic - if they're not, we've already picked the
363 shortest opcode by now. The linker, however, will still have to
364 check any operands to see if they're the displacement type, since
365 we don't know (nor record) *which* operands are relaxable. */
367 && rl_type != RL_TYPE_NONE
368 && (rl_type == RL_TYPE_JUMP || results.num_fixups)
369 && !relaxable (insn))
372 int addend = results.num_fixups + 16 * insn_size/8;
374 switch (rl_for (insn))
376 case RL_TYPE_JUMP: reloc = BFD_RELOC_M32C_RL_JUMP; break;
377 case RL_TYPE_1ADDR: reloc = BFD_RELOC_M32C_RL_1ADDR; break;
378 case RL_TYPE_2ADDR: reloc = BFD_RELOC_M32C_RL_2ADDR; break;
380 if (insn.insn->base->num == M32C_INSN_JMP16_S
381 || insn.insn->base->num == M32C_INSN_JMP32_S)
384 fix_new (results.frag,
385 results.addr - results.frag->fr_literal,
386 0, abs_section_sym, addend, 0,
391 /* The syntax in the manual says constants begin with '#'.
392 We just ignore it. */
395 md_operand (expressionS * exp)
397 /* In case of a syntax error, escape back to try next syntax combo. */
398 if (exp->X_op == O_absent)
399 gas_cgen_md_operand (exp);
403 md_section_align (segT segment, valueT size)
405 int align = bfd_get_section_alignment (stdoutput, segment);
406 return ((size + (1 << align) - 1) & (-1 << align));
410 md_undefined_symbol (char * name ATTRIBUTE_UNUSED)
415 const relax_typeS md_relax_table[] =
418 1) most positive reach of this state,
419 2) most negative reach of this state,
420 3) how many bytes this mode will have in the variable part of the frag
421 4) which index into the table to try if we can't fit into this one. */
423 /* 0 */ { 0, 0, 0, 0 }, /* unused */
424 /* 1 */ { 0, 0, 0, 0 }, /* marker for "don't know yet" */
426 /* 2 */ { 127, -128, 2, 3 }, /* jcnd16_5.b */
427 /* 3 */ { 32767, -32768, 5, 4 }, /* jcnd16_5.w */
428 /* 4 */ { 0, 0, 6, 0 }, /* jcnd16_5.a */
430 /* 5 */ { 127, -128, 2, 6 }, /* jcnd16.b */
431 /* 6 */ { 32767, -32768, 5, 7 }, /* jcnd16.w */
432 /* 7 */ { 0, 0, 6, 0 }, /* jcnd16.a */
434 /* 8 */ { 8, 1, 1, 9 }, /* jmp16.s */
435 /* 9 */ { 127, -128, 2, 10 }, /* jmp16.b */
436 /* 10 */ { 32767, -32768, 3, 11 }, /* jmp16.w */
437 /* 11 */ { 0, 0, 4, 0 }, /* jmp16.a */
439 /* 12 */ { 127, -128, 2, 13 }, /* jcnd32.b */
440 /* 13 */ { 32767, -32768, 5, 14 }, /* jcnd32.w */
441 /* 14 */ { 0, 0, 6, 0 }, /* jcnd32.a */
443 /* 15 */ { 8, 1, 1, 16 }, /* jmp32.s */
444 /* 16 */ { 127, -128, 2, 17 }, /* jmp32.b */
445 /* 17 */ { 32767, -32768, 3, 18 }, /* jmp32.w */
446 /* 18 */ { 0, 0, 4, 0 }, /* jmp32.a */
448 /* 19 */ { 32767, -32768, 3, 20 }, /* jsr16.w */
449 /* 20 */ { 0, 0, 4, 0 }, /* jsr16.a */
450 /* 21 */ { 32767, -32768, 3, 11 }, /* jsr32.w */
451 /* 22 */ { 0, 0, 4, 0 }, /* jsr32.a */
453 /* 23 */ { 0, 0, 3, 0 }, /* adjnz pc8 */
454 /* 24 */ { 0, 0, 4, 0 }, /* adjnz disp8 pc8 */
455 /* 25 */ { 0, 0, 5, 0 }, /* adjnz disp16 pc8 */
456 /* 26 */ { 0, 0, 6, 0 } /* adjnz disp24 pc8 */
460 M32C_MACRO_JCND16_5_W,
461 M32C_MACRO_JCND16_5_A,
466 /* the digit is the array index of the pcrel byte */
477 int pcrel_aim_offset;
478 } subtype_mappings[] = {
479 /* 0 */ { 0, 0, 0, 0 },
480 /* 1 */ { 0, 0, 0, 0 },
482 /* 2 */ { M32C_INSN_JCND16_5, 2, -M32C_MACRO_JCND16_5_A, 1 },
483 /* 3 */ { -M32C_MACRO_JCND16_5_W, 5, -M32C_MACRO_JCND16_5_A, 4 },
484 /* 4 */ { -M32C_MACRO_JCND16_5_A, 6, -M32C_MACRO_JCND16_5_A, 0 },
486 /* 5 */ { M32C_INSN_JCND16, 3, -M32C_MACRO_JCND16_A, 1 },
487 /* 6 */ { -M32C_MACRO_JCND16_W, 6, -M32C_MACRO_JCND16_A, 4 },
488 /* 7 */ { -M32C_MACRO_JCND16_A, 7, -M32C_MACRO_JCND16_A, 0 },
490 /* 8 */ { M32C_INSN_JMP16_S, 1, M32C_INSN_JMP16_A, 0 },
491 /* 9 */ { M32C_INSN_JMP16_B, 2, M32C_INSN_JMP16_A, 1 },
492 /* 10 */ { M32C_INSN_JMP16_W, 3, M32C_INSN_JMP16_A, 2 },
493 /* 11 */ { M32C_INSN_JMP16_A, 4, M32C_INSN_JMP16_A, 0 },
495 /* 12 */ { M32C_INSN_JCND32, 2, -M32C_MACRO_JCND32_A, 1 },
496 /* 13 */ { -M32C_MACRO_JCND32_W, 5, -M32C_MACRO_JCND32_A, 4 },
497 /* 14 */ { -M32C_MACRO_JCND32_A, 6, -M32C_MACRO_JCND32_A, 0 },
499 /* 15 */ { M32C_INSN_JMP32_S, 1, M32C_INSN_JMP32_A, 0 },
500 /* 16 */ { M32C_INSN_JMP32_B, 2, M32C_INSN_JMP32_A, 1 },
501 /* 17 */ { M32C_INSN_JMP32_W, 3, M32C_INSN_JMP32_A, 2 },
502 /* 18 */ { M32C_INSN_JMP32_A, 4, M32C_INSN_JMP32_A, 0 },
504 /* 19 */ { M32C_INSN_JSR16_W, 3, M32C_INSN_JSR16_A, 2 },
505 /* 20 */ { M32C_INSN_JSR16_A, 4, M32C_INSN_JSR16_A, 0 },
506 /* 21 */ { M32C_INSN_JSR32_W, 3, M32C_INSN_JSR32_A, 2 },
507 /* 22 */ { M32C_INSN_JSR32_A, 4, M32C_INSN_JSR32_A, 0 },
509 /* 23 */ { -M32C_MACRO_ADJNZ_2, 3, -M32C_MACRO_ADJNZ_2, 0 },
510 /* 24 */ { -M32C_MACRO_ADJNZ_3, 4, -M32C_MACRO_ADJNZ_3, 0 },
511 /* 25 */ { -M32C_MACRO_ADJNZ_4, 5, -M32C_MACRO_ADJNZ_4, 0 },
512 /* 26 */ { -M32C_MACRO_ADJNZ_5, 6, -M32C_MACRO_ADJNZ_5, 0 }
514 #define NUM_MAPPINGS (sizeof (subtype_mappings) / sizeof (subtype_mappings[0]))
517 m32c_prepare_relax_scan (fragS *fragP, offsetT *aim, relax_substateT this_state)
519 symbolS *symbolP = fragP->fr_symbol;
520 if (symbolP && !S_IS_DEFINED (symbolP))
522 /* Adjust for m32c pcrel not being relative to the next opcode. */
523 *aim += subtype_mappings[this_state].pcrel_aim_offset;
527 insn_to_subtype (int inum, const CGEN_INSN *insn)
532 && (strncmp (insn->base->mnemonic, "adjnz", 5) == 0
533 || strncmp (insn->base->mnemonic, "sbjnz", 5) == 0))
535 i = 23 + insn->base->bitsize/8 - 3;
536 /*printf("mapping %d used for %s\n", i, insn->base->mnemonic);*/
540 for (i=0; i<NUM_MAPPINGS; i++)
541 if (inum == subtype_mappings[i].insn)
543 /*printf("mapping %d used\n", i);*/
549 /* Return an initial guess of the length by which a fragment must grow to
550 hold a branch to reach its destination.
551 Also updates fr_type/fr_subtype as necessary.
553 Called just before doing relaxation.
554 Any symbol that is now undefined will not become defined.
555 The guess for fr_var is ACTUALLY the growth beyond fr_fix.
556 Whatever we do to grow fr_fix or fr_var contributes to our returned value.
557 Although it may not be explicit in the frag, pretend fr_var starts with a
561 md_estimate_size_before_relax (fragS * fragP, segT segment ATTRIBUTE_UNUSED)
563 int where = fragP->fr_opcode - fragP->fr_literal;
565 if (fragP->fr_subtype == 1)
566 fragP->fr_subtype = insn_to_subtype (fragP->fr_cgen.insn->base->num, fragP->fr_cgen.insn);
568 if (S_GET_SEGMENT (fragP->fr_symbol) != segment)
572 new_insn = subtype_mappings[fragP->fr_subtype].insn_for_extern;
573 fragP->fr_subtype = insn_to_subtype (new_insn, 0);
576 if (fragP->fr_cgen.insn->base
577 && fragP->fr_cgen.insn->base->num
578 != subtype_mappings[fragP->fr_subtype].insn
579 && subtype_mappings[fragP->fr_subtype].insn > 0)
581 int new_insn= subtype_mappings[fragP->fr_subtype].insn;
584 fragP->fr_cgen.insn = (fragP->fr_cgen.insn
585 - fragP->fr_cgen.insn->base->num
590 return subtype_mappings[fragP->fr_subtype].bytes - (fragP->fr_fix - where);
593 /* *fragP has been relaxed to its final size, and now needs to have
594 the bytes inside it modified to conform to the new size.
596 Called after relaxation is finished.
597 fragP->fr_type == rs_machine_dependent.
598 fragP->fr_subtype is the subtype of what the address relaxed to. */
601 target_address_for (fragS *frag)
603 int rv = frag->fr_offset;
604 symbolS *sym = frag->fr_symbol;
607 rv += S_GET_VALUE (sym);
609 /*printf("target_address_for returns %d\n", rv);*/
614 md_convert_frag (bfd * abfd ATTRIBUTE_UNUSED,
615 segT sec ATTRIBUTE_UNUSED,
616 fragS * fragP ATTRIBUTE_UNUSED)
621 int where = fragP->fr_opcode - fragP->fr_literal;
622 int rl_where = fragP->fr_opcode - fragP->fr_literal;
623 unsigned char *op = (unsigned char *)fragP->fr_opcode;
628 addend = target_address_for (fragP) - (fragP->fr_address + where);
629 new_insn = subtype_mappings[fragP->fr_subtype].insn;
631 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;
644 case -M32C_MACRO_JCND16_5_W:
649 op[4] = (addend - 3) >> 8;
650 operand = M32C_OPERAND_LAB_8_16;
652 new_insn = M32C_INSN_JMP16_W;
658 case -M32C_MACRO_JCND16_5_A:
662 operand = M32C_OPERAND_LAB_8_24;
664 new_insn = M32C_INSN_JMP16_A;
671 case M32C_INSN_JCND16:
673 operand = M32C_OPERAND_LAB_16_8;
679 case -M32C_MACRO_JCND16_W:
684 op[5] = (addend - 4) >> 8;
685 operand = M32C_OPERAND_LAB_8_16;
687 new_insn = M32C_INSN_JMP16_W;
693 case -M32C_MACRO_JCND16_A:
697 operand = M32C_OPERAND_LAB_8_24;
699 new_insn = M32C_INSN_JMP16_A;
705 case M32C_INSN_JMP16_S:
706 op[0] = 0x60 | ((addend-2) & 0x07);
707 operand = M32C_OPERAND_LAB_5_3;
713 case M32C_INSN_JMP16_B:
716 operand = M32C_OPERAND_LAB_8_8;
722 case M32C_INSN_JMP16_W:
725 op[2] = (addend - 1) >> 8;
726 operand = M32C_OPERAND_LAB_8_16;
732 case M32C_INSN_JMP16_A:
737 operand = M32C_OPERAND_LAB_8_24;
743 case M32C_INSN_JCND32:
745 operand = M32C_OPERAND_LAB_8_8;
751 case -M32C_MACRO_JCND32_W:
756 op[4] = (addend - 3) >> 8;
757 operand = M32C_OPERAND_LAB_8_16;
759 new_insn = M32C_INSN_JMP32_W;
765 case -M32C_MACRO_JCND32_A:
769 operand = M32C_OPERAND_LAB_8_24;
771 new_insn = M32C_INSN_JMP32_A;
779 case M32C_INSN_JMP32_S:
780 addend = ((addend-2) & 0x07);
781 op[0] = 0x4a | (addend & 0x01) | ((addend << 3) & 0x30);
782 operand = M32C_OPERAND_LAB32_JMP_S;
788 case M32C_INSN_JMP32_B:
791 operand = M32C_OPERAND_LAB_8_8;
797 case M32C_INSN_JMP32_W:
800 op[2] = (addend - 1) >> 8;
801 operand = M32C_OPERAND_LAB_8_16;
807 case M32C_INSN_JMP32_A:
812 operand = M32C_OPERAND_LAB_8_24;
819 case M32C_INSN_JSR16_W:
822 op[2] = (addend - 1) >> 8;
823 operand = M32C_OPERAND_LAB_8_16;
829 case M32C_INSN_JSR16_A:
834 operand = M32C_OPERAND_LAB_8_24;
840 case M32C_INSN_JSR32_W:
843 op[2] = (addend - 1) >> 8;
844 operand = M32C_OPERAND_LAB_8_16;
850 case M32C_INSN_JSR32_A:
855 operand = M32C_OPERAND_LAB_8_24;
861 case -M32C_MACRO_ADJNZ_2:
864 operand = M32C_OPERAND_LAB_16_8;
866 case -M32C_MACRO_ADJNZ_3:
869 operand = M32C_OPERAND_LAB_24_8;
871 case -M32C_MACRO_ADJNZ_4:
874 operand = M32C_OPERAND_LAB_32_8;
876 case -M32C_MACRO_ADJNZ_5:
879 operand = M32C_OPERAND_LAB_40_8;
884 printf("\nHey! Need more opcode converters! missing: %d %s\n\n",
886 fragP->fr_cgen.insn->base->name);
892 if (operand != M32C_OPERAND_LAB_8_24)
893 fragP->fr_offset = (fragP->fr_address + where);
897 0, abs_section_sym, rl_addend, 0,
898 BFD_RELOC_M32C_RL_JUMP);
901 if (S_GET_SEGMENT (fragP->fr_symbol) != sec
902 || operand == M32C_OPERAND_LAB_8_24
903 || (m32c_relax && (operand != M32C_OPERAND_LAB_5_3
904 && operand != M32C_OPERAND_LAB32_JMP_S)))
907 assert (fragP->fr_cgen.insn != 0);
908 fixP = gas_cgen_record_fixup (fragP,
911 (fragP->fr_fix - where) * 8,
912 cgen_operand_lookup_by_num (gas_cgen_cpu_desc,
914 fragP->fr_cgen.opinfo,
915 fragP->fr_symbol, fragP->fr_offset);
919 /* Functions concerning relocs. */
921 /* The location from which a PC relative jump should be calculated,
922 given a PC relative reloc. */
925 md_pcrel_from_section (fixS * fixP, segT sec)
927 if (fixP->fx_addsy != (symbolS *) NULL
928 && (! S_IS_DEFINED (fixP->fx_addsy)
929 || S_GET_SEGMENT (fixP->fx_addsy) != sec))
930 /* The symbol is undefined (or is defined but not in this section).
931 Let the linker figure it out. */
934 return (fixP->fx_frag->fr_address + fixP->fx_where);
937 /* Return the bfd reloc type for OPERAND of INSN at fixup FIXP.
938 Returns BFD_RELOC_NONE if no reloc type can be found.
939 *FIXP may be modified if desired. */
941 bfd_reloc_code_real_type
942 md_cgen_lookup_reloc (const CGEN_INSN * insn ATTRIBUTE_UNUSED,
943 const CGEN_OPERAND * operand,
944 fixS * fixP ATTRIBUTE_UNUSED)
946 static const struct op_reloc {
947 /* A CGEN operand type that can be a relocatable expression. */
948 CGEN_OPERAND_TYPE operand;
950 /* The appropriate BFD reloc type to use for that. */
951 bfd_reloc_code_real_type reloc;
953 /* The offset from the start of the instruction to the field to be
954 relocated, in bytes. */
956 } op_reloc_table[] = {
958 /* PC-REL relocs for 8-bit fields. */
959 { M32C_OPERAND_LAB_8_8, BFD_RELOC_8_PCREL, 1 },
960 { M32C_OPERAND_LAB_16_8, BFD_RELOC_8_PCREL, 2 },
961 { M32C_OPERAND_LAB_24_8, BFD_RELOC_8_PCREL, 3 },
962 { M32C_OPERAND_LAB_32_8, BFD_RELOC_8_PCREL, 4 },
963 { M32C_OPERAND_LAB_40_8, BFD_RELOC_8_PCREL, 5 },
965 /* PC-REL relocs for 16-bit fields. */
966 { M32C_OPERAND_LAB_8_16, BFD_RELOC_16_PCREL, 1 },
968 /* Absolute relocs for 8-bit fields. */
969 { M32C_OPERAND_IMM_8_QI, BFD_RELOC_8, 1 },
970 { M32C_OPERAND_IMM_16_QI, BFD_RELOC_8, 2 },
971 { M32C_OPERAND_IMM_24_QI, BFD_RELOC_8, 3 },
972 { M32C_OPERAND_IMM_32_QI, BFD_RELOC_8, 4 },
973 { M32C_OPERAND_IMM_40_QI, BFD_RELOC_8, 5 },
974 { M32C_OPERAND_IMM_48_QI, BFD_RELOC_8, 6 },
975 { M32C_OPERAND_IMM_56_QI, BFD_RELOC_8, 7 },
976 { M32C_OPERAND_DSP_8_S8, BFD_RELOC_8, 1 },
977 { M32C_OPERAND_DSP_16_S8, BFD_RELOC_8, 2 },
978 { M32C_OPERAND_DSP_24_S8, BFD_RELOC_8, 3 },
979 { M32C_OPERAND_DSP_32_S8, BFD_RELOC_8, 4 },
980 { M32C_OPERAND_DSP_40_S8, BFD_RELOC_8, 5 },
981 { M32C_OPERAND_DSP_48_S8, BFD_RELOC_8, 6 },
982 { M32C_OPERAND_DSP_8_U8, BFD_RELOC_8, 1 },
983 { M32C_OPERAND_DSP_16_U8, BFD_RELOC_8, 2 },
984 { M32C_OPERAND_DSP_24_U8, BFD_RELOC_8, 3 },
985 { M32C_OPERAND_DSP_32_U8, BFD_RELOC_8, 4 },
986 { M32C_OPERAND_DSP_40_U8, BFD_RELOC_8, 5 },
987 { M32C_OPERAND_DSP_48_U8, BFD_RELOC_8, 6 },
988 { M32C_OPERAND_BITBASE32_16_S11_UNPREFIXED, BFD_RELOC_8, 2 },
989 { M32C_OPERAND_BITBASE32_16_U11_UNPREFIXED, BFD_RELOC_8, 2 },
990 { M32C_OPERAND_BITBASE32_24_S11_PREFIXED, BFD_RELOC_8, 3 },
991 { M32C_OPERAND_BITBASE32_24_U11_PREFIXED, BFD_RELOC_8, 3 },
993 /* Absolute relocs for 16-bit fields. */
994 { M32C_OPERAND_IMM_8_HI, BFD_RELOC_16, 1 },
995 { M32C_OPERAND_IMM_16_HI, BFD_RELOC_16, 2 },
996 { M32C_OPERAND_IMM_24_HI, BFD_RELOC_16, 3 },
997 { M32C_OPERAND_IMM_32_HI, BFD_RELOC_16, 4 },
998 { M32C_OPERAND_IMM_40_HI, BFD_RELOC_16, 5 },
999 { M32C_OPERAND_IMM_48_HI, BFD_RELOC_16, 6 },
1000 { M32C_OPERAND_IMM_56_HI, BFD_RELOC_16, 7 },
1001 { M32C_OPERAND_IMM_64_HI, BFD_RELOC_16, 8 },
1002 { M32C_OPERAND_DSP_16_S16, BFD_RELOC_16, 2 },
1003 { M32C_OPERAND_DSP_24_S16, BFD_RELOC_16, 3 },
1004 { M32C_OPERAND_DSP_32_S16, BFD_RELOC_16, 4 },
1005 { M32C_OPERAND_DSP_40_S16, BFD_RELOC_16, 5 },
1006 { M32C_OPERAND_DSP_8_U16, BFD_RELOC_16, 1 },
1007 { M32C_OPERAND_DSP_16_U16, BFD_RELOC_16, 2 },
1008 { M32C_OPERAND_DSP_24_U16, BFD_RELOC_16, 3 },
1009 { M32C_OPERAND_DSP_32_U16, BFD_RELOC_16, 4 },
1010 { M32C_OPERAND_DSP_40_U16, BFD_RELOC_16, 5 },
1011 { M32C_OPERAND_DSP_48_U16, BFD_RELOC_16, 6 },
1012 { M32C_OPERAND_BITBASE32_16_S19_UNPREFIXED, BFD_RELOC_16, 2 },
1013 { M32C_OPERAND_BITBASE32_16_U19_UNPREFIXED, BFD_RELOC_16, 2 },
1014 { M32C_OPERAND_BITBASE32_24_S19_PREFIXED, BFD_RELOC_16, 3 },
1015 { M32C_OPERAND_BITBASE32_24_U19_PREFIXED, BFD_RELOC_16, 3 },
1017 /* Absolute relocs for 24-bit fields. */
1018 { M32C_OPERAND_LAB_8_24, BFD_RELOC_24, 1 },
1019 { M32C_OPERAND_DSP_8_S24, BFD_RELOC_24, 1 },
1020 { M32C_OPERAND_DSP_8_U24, BFD_RELOC_24, 1 },
1021 { M32C_OPERAND_DSP_16_U24, BFD_RELOC_24, 2 },
1022 { M32C_OPERAND_DSP_24_U24, BFD_RELOC_24, 3 },
1023 { M32C_OPERAND_DSP_32_U24, BFD_RELOC_24, 4 },
1024 { M32C_OPERAND_DSP_40_U24, BFD_RELOC_24, 5 },
1025 { M32C_OPERAND_DSP_48_U24, BFD_RELOC_24, 6 },
1026 { M32C_OPERAND_DSP_16_U20, BFD_RELOC_24, 2 },
1027 { M32C_OPERAND_DSP_24_U20, BFD_RELOC_24, 3 },
1028 { M32C_OPERAND_DSP_32_U20, BFD_RELOC_24, 4 },
1029 { M32C_OPERAND_BITBASE32_16_U27_UNPREFIXED, BFD_RELOC_24, 2 },
1030 { M32C_OPERAND_BITBASE32_24_U27_PREFIXED, BFD_RELOC_24, 3 },
1032 /* Absolute relocs for 32-bit fields. */
1033 { M32C_OPERAND_IMM_16_SI, BFD_RELOC_32, 2 },
1034 { M32C_OPERAND_IMM_24_SI, BFD_RELOC_32, 3 },
1035 { M32C_OPERAND_IMM_32_SI, BFD_RELOC_32, 4 },
1036 { M32C_OPERAND_IMM_40_SI, BFD_RELOC_32, 5 },
1042 for (i = ARRAY_SIZE (op_reloc_table); --i >= 0; )
1044 const struct op_reloc *or = &op_reloc_table[i];
1046 if (or->operand == operand->type)
1048 fixP->fx_where += or->offset;
1049 fixP->fx_size -= or->offset;
1051 if (fixP->fx_cgen.opinfo
1052 && fixP->fx_cgen.opinfo != BFD_RELOC_NONE)
1053 return fixP->fx_cgen.opinfo;
1061 "Error: tc-m32c.c:md_cgen_lookup_reloc Unimplemented relocation for operand %s\n",
1064 return BFD_RELOC_NONE;
1068 m32c_cons_fix_new (fragS * frag,
1073 bfd_reloc_code_real_type type;
1081 type = BFD_RELOC_16;
1084 type = BFD_RELOC_24;
1088 type = BFD_RELOC_32;
1091 type = BFD_RELOC_64;
1095 fix_new_exp (frag, where, (int) size, exp, 0, type);
1099 m32c_apply_fix (struct fix *f, valueT *t, segT s)
1101 if (f->fx_r_type == BFD_RELOC_M32C_RL_JUMP
1102 || f->fx_r_type == BFD_RELOC_M32C_RL_1ADDR
1103 || f->fx_r_type == BFD_RELOC_M32C_RL_2ADDR)
1105 gas_cgen_md_apply_fix (f, t, s);
1109 tc_gen_reloc (asection *sec, fixS *fx)
1111 if (fx->fx_r_type == BFD_RELOC_M32C_RL_JUMP
1112 || fx->fx_r_type == BFD_RELOC_M32C_RL_1ADDR
1113 || fx->fx_r_type == BFD_RELOC_M32C_RL_2ADDR)
1117 reloc = xmalloc (sizeof (* reloc));
1119 reloc->sym_ptr_ptr = xmalloc (sizeof (asymbol *));
1120 *reloc->sym_ptr_ptr = symbol_get_bfdsym (fx->fx_addsy);
1121 reloc->address = fx->fx_frag->fr_address + fx->fx_where;
1122 reloc->howto = bfd_reloc_type_lookup (stdoutput, fx->fx_r_type);
1123 reloc->addend = fx->fx_offset;
1127 return gas_cgen_tc_gen_reloc (sec, fx);
1130 /* See whether we need to force a relocation into the output file.
1131 This is used to force out switch and PC relative relocations when
1135 m32c_force_relocation (fixS * fixp)
1137 int reloc = fixp->fx_r_type;
1139 if (reloc > (int)BFD_RELOC_UNUSED)
1141 reloc -= (int)BFD_RELOC_UNUSED;
1144 case M32C_OPERAND_DSP_32_S16:
1145 case M32C_OPERAND_DSP_32_U16:
1146 case M32C_OPERAND_IMM_32_HI:
1147 case M32C_OPERAND_DSP_16_S16:
1148 case M32C_OPERAND_DSP_16_U16:
1149 case M32C_OPERAND_IMM_16_HI:
1150 case M32C_OPERAND_DSP_24_S16:
1151 case M32C_OPERAND_DSP_24_U16:
1152 case M32C_OPERAND_IMM_24_HI:
1155 /* If we're doing linker relaxing, we need to keep all the
1156 pc-relative jumps in case we need to fix them due to
1157 deleted bytes between the jump and its destination. */
1158 case M32C_OPERAND_LAB_8_8:
1159 case M32C_OPERAND_LAB_8_16:
1160 case M32C_OPERAND_LAB_8_24:
1161 case M32C_OPERAND_LAB_16_8:
1162 case M32C_OPERAND_LAB_24_8:
1163 case M32C_OPERAND_LAB_32_8:
1164 case M32C_OPERAND_LAB_40_8:
1173 switch (fixp->fx_r_type)
1178 case BFD_RELOC_M32C_RL_JUMP:
1179 case BFD_RELOC_M32C_RL_1ADDR:
1180 case BFD_RELOC_M32C_RL_2ADDR:
1181 case BFD_RELOC_8_PCREL:
1182 case BFD_RELOC_16_PCREL:
1190 return generic_force_reloc (fixp);
1193 /* Write a value out to the object file, using the appropriate endianness. */
1196 md_number_to_chars (char * buf, valueT val, int n)
1198 number_to_chars_littleendian (buf, val, n);
1201 /* Turn a string in input_line_pointer into a floating point constant of type
1202 type, and store the appropriate bytes in *litP. The number of LITTLENUMS
1203 emitted is stored in *sizeP . An error message is returned, or NULL on OK. */
1205 /* Equal to MAX_PRECISION in atof-ieee.c. */
1206 #define MAX_LITTLENUMS 6
1209 md_atof (int type, char * litP, int * sizeP)
1213 LITTLENUM_TYPE words [MAX_LITTLENUMS];
1232 /* FIXME: Some targets allow other format chars for bigger sizes here. */
1236 return _("Bad call to md_atof()");
1239 t = atof_ieee (input_line_pointer, type, words);
1241 input_line_pointer = t;
1242 * sizeP = prec * sizeof (LITTLENUM_TYPE);
1244 for (i = 0; i < prec; i++)
1246 md_number_to_chars (litP, (valueT) words[i],
1247 sizeof (LITTLENUM_TYPE));
1248 litP += sizeof (LITTLENUM_TYPE);
1255 m32c_fix_adjustable (fixS * fixP)
1258 if (fixP->fx_addsy == NULL)
1261 /* We need the symbol name for the VTABLE entries. */
1262 reloc = fixP->fx_r_type;
1263 if (reloc > (int)BFD_RELOC_UNUSED)
1265 reloc -= (int)BFD_RELOC_UNUSED;
1268 case M32C_OPERAND_DSP_32_S16:
1269 case M32C_OPERAND_DSP_32_U16:
1270 case M32C_OPERAND_IMM_32_HI:
1271 case M32C_OPERAND_DSP_16_S16:
1272 case M32C_OPERAND_DSP_16_U16:
1273 case M32C_OPERAND_IMM_16_HI:
1274 case M32C_OPERAND_DSP_24_S16:
1275 case M32C_OPERAND_DSP_24_U16:
1276 case M32C_OPERAND_IMM_24_HI:
1282 if (fixP->fx_r_type == BFD_RELOC_16)
1286 /* Do not adjust relocations involving symbols in merged sections.
1288 A reloc patching in the value of some symbol S plus some addend A
1289 can be produced in different ways:
1291 1) It might simply be a reference to the data at S + A. Clearly,
1292 if linker merging shift that data around, the value patched in
1293 by the reloc needs to be adjusted accordingly.
1295 2) Or, it might be a reference to S, with A added in as a constant
1296 bias. For example, given code like this:
1302 it would be reasonable for the compiler to rearrange the array
1303 reference to something like:
1307 and emit assembly code that refers to S - (8 * sizeof (int)),
1308 so the subtraction is done entirely at compile-time. In this
1309 case, the reloc's addend A would be -(8 * sizeof (int)), and
1310 shifting around code or data at S + A should not affect the
1311 reloc: the reloc isn't referring to that code or data at all.
1313 The linker has no way of knowing which case it has in hand. So,
1314 to disambiguate, we have the linker always treat reloc addends as
1315 in case 2): they're constants that should be simply added to the
1316 symbol value, just like the reloc says. And we express case 1)
1317 in different way: we have the compiler place a label at the real
1318 target, and reference that label with an addend of zero. (The
1319 compiler is unlikely to reference code using a label plus an
1320 offset anyway, since it doesn't know the sizes of the
1323 The simplification being done by gas/write.c:adjust_reloc_syms,
1324 however, turns the explicit-label usage into the label-plus-
1325 offset usage, re-introducing the ambiguity the compiler avoided.
1326 So we need to disable that simplification for symbols referring
1329 This only affects object size a little bit. */
1330 if (S_GET_SEGMENT (fixP->fx_addsy)->flags & SEC_MERGE)
1339 /* Worker function for m32c_is_colon_insn(). */
1340 static char restore_colon PARAMS ((int));
1343 restore_colon (int advance_i_l_p_by)
1347 /* Restore the colon, and advance input_line_pointer to
1348 the end of the new symbol. */
1349 * input_line_pointer = ':';
1350 input_line_pointer += advance_i_l_p_by;
1351 c = * input_line_pointer;
1352 * input_line_pointer = 0;
1357 /* Determines if the symbol starting at START and ending in
1358 a colon that was at the location pointed to by INPUT_LINE_POINTER
1359 (but which has now been replaced bu a NUL) is in fact an
1360 :Z, :S, :Q, or :G suffix.
1361 If it is, then it restores the colon, advances INPUT_LINE_POINTER
1362 to the real end of the instruction/symbol, and returns the character
1363 that really terminated the symbol. Otherwise it returns 0. */
1365 m32c_is_colon_insn (char *start ATTRIBUTE_UNUSED)
1367 char * i_l_p = input_line_pointer;
1369 /* Check to see if the text following the colon is 'G' */
1370 if (TOLOWER (i_l_p[1]) == 'g' && (i_l_p[2] == ' ' || i_l_p[2] == '\t'))
1371 return restore_colon (2);
1373 /* Check to see if the text following the colon is 'Q' */
1374 if (TOLOWER (i_l_p[1]) == 'q' && (i_l_p[2] == ' ' || i_l_p[2] == '\t'))
1375 return restore_colon (2);
1377 /* Check to see if the text following the colon is 'S' */
1378 if (TOLOWER (i_l_p[1]) == 's' && (i_l_p[2] == ' ' || i_l_p[2] == '\t'))
1379 return restore_colon (2);
1381 /* Check to see if the text following the colon is 'Z' */
1382 if (TOLOWER (i_l_p[1]) == 'z' && (i_l_p[2] == ' ' || i_l_p[2] == '\t'))
1383 return restore_colon (2);