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49f58d10 JB |
1 | /* tc-m32c.c -- Assembler for the Renesas M32C. |
2 | Copyright (C) 2005 Free Software Foundation. | |
3 | Contributed by RedHat. | |
4 | ||
5 | This file is part of GAS, the GNU Assembler. | |
6 | ||
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 2, or (at your option) | |
10 | any later version. | |
11 | ||
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. | |
16 | ||
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. */ | |
21 | ||
22 | #include <stdio.h> | |
23 | #include "as.h" | |
24 | #include "subsegs.h" | |
25 | #include "symcat.h" | |
26 | #include "opcodes/m32c-desc.h" | |
27 | #include "opcodes/m32c-opc.h" | |
28 | #include "cgen.h" | |
29 | #include "elf/common.h" | |
30 | #include "elf/m32c.h" | |
31 | #include "libbfd.h" | |
32 | #include "libiberty.h" | |
33 | #include "safe-ctype.h" | |
bbc434cb | 34 | #include "bfd.h" |
49f58d10 JB |
35 | |
36 | /* Structure to hold all of the different components | |
37 | describing an individual instruction. */ | |
38 | typedef struct | |
39 | { | |
40 | const CGEN_INSN * insn; | |
41 | const CGEN_INSN * orig_insn; | |
42 | CGEN_FIELDS fields; | |
43 | #if CGEN_INT_INSN_P | |
44 | CGEN_INSN_INT buffer [1]; | |
45 | #define INSN_VALUE(buf) (*(buf)) | |
46 | #else | |
47 | unsigned char buffer [CGEN_MAX_INSN_SIZE]; | |
48 | #define INSN_VALUE(buf) (buf) | |
49 | #endif | |
50 | char * addr; | |
51 | fragS * frag; | |
52 | int num_fixups; | |
53 | fixS * fixups [GAS_CGEN_MAX_FIXUPS]; | |
54 | int indices [MAX_OPERAND_INSTANCES]; | |
55 | } | |
56 | m32c_insn; | |
57 | ||
6772dd07 DD |
58 | #define rl_for(insn) (CGEN_ATTR_CGEN_INSN_RL_TYPE_VALUE (&(insn.insn->base->attrs))) |
59 | #define relaxable(insn) (CGEN_ATTR_CGEN_INSN_RELAXABLE_VALUE (&(insn.insn->base->attrs))) | |
60 | ||
49f58d10 JB |
61 | const char comment_chars[] = ";"; |
62 | const char line_comment_chars[] = "#"; | |
63 | const char line_separator_chars[] = "|"; | |
64 | const char EXP_CHARS[] = "eE"; | |
65 | const char FLT_CHARS[] = "dD"; | |
66 | \f | |
67 | #define M32C_SHORTOPTS "" | |
68 | const char * md_shortopts = M32C_SHORTOPTS; | |
69 | ||
70 | /* assembler options */ | |
71 | #define OPTION_CPU_M16C (OPTION_MD_BASE) | |
72 | #define OPTION_CPU_M32C (OPTION_MD_BASE + 1) | |
6772dd07 | 73 | #define OPTION_LINKRELAX (OPTION_MD_BASE + 2) |
49f58d10 JB |
74 | |
75 | struct option md_longopts[] = | |
76 | { | |
77 | { "m16c", no_argument, NULL, OPTION_CPU_M16C }, | |
78 | { "m32c", no_argument, NULL, OPTION_CPU_M32C }, | |
6772dd07 | 79 | { "relax", no_argument, NULL, OPTION_LINKRELAX }, |
49f58d10 JB |
80 | {NULL, no_argument, NULL, 0} |
81 | }; | |
82 | size_t md_longopts_size = sizeof (md_longopts); | |
83 | ||
84 | /* Default machine */ | |
85 | ||
86 | #define DEFAULT_MACHINE bfd_mach_m16c | |
87 | #define DEFAULT_FLAGS EF_M32C_CPU_M16C | |
88 | ||
89 | static unsigned long m32c_mach = bfd_mach_m16c; | |
90 | static int cpu_mach = (1 << MACH_M16C); | |
91 | static int insn_size; | |
6772dd07 | 92 | static int m32c_relax = 0; |
49f58d10 JB |
93 | |
94 | /* Flags to set in the elf header */ | |
95 | static flagword m32c_flags = DEFAULT_FLAGS; | |
96 | ||
4fb1e3d3 DB |
97 | static char default_isa = 1 << (7 - ISA_M16C); |
98 | static CGEN_BITSET m32c_isa = {1, & default_isa}; | |
49f58d10 JB |
99 | |
100 | static void | |
101 | set_isa (enum isa_attr isa_num) | |
102 | { | |
4fb1e3d3 | 103 | cgen_bitset_set (& m32c_isa, isa_num); |
49f58d10 JB |
104 | } |
105 | ||
106 | static void s_bss (int); | |
107 | ||
108 | int | |
109 | md_parse_option (int c, char * arg ATTRIBUTE_UNUSED) | |
110 | { | |
111 | switch (c) | |
112 | { | |
113 | case OPTION_CPU_M16C: | |
114 | m32c_flags = (m32c_flags & ~EF_M32C_CPU_MASK) | EF_M32C_CPU_M16C; | |
115 | m32c_mach = bfd_mach_m16c; | |
116 | cpu_mach = (1 << MACH_M16C); | |
117 | set_isa (ISA_M16C); | |
118 | break; | |
119 | ||
120 | case OPTION_CPU_M32C: | |
121 | m32c_flags = (m32c_flags & ~EF_M32C_CPU_MASK) | EF_M32C_CPU_M32C; | |
122 | m32c_mach = bfd_mach_m32c; | |
123 | cpu_mach = (1 << MACH_M32C); | |
124 | set_isa (ISA_M32C); | |
125 | break; | |
126 | ||
6772dd07 DD |
127 | case OPTION_LINKRELAX: |
128 | m32c_relax = 1; | |
129 | break; | |
130 | ||
49f58d10 JB |
131 | default: |
132 | return 0; | |
133 | } | |
134 | return 1; | |
135 | } | |
136 | ||
137 | void | |
138 | md_show_usage (FILE * stream) | |
139 | { | |
140 | fprintf (stream, _(" M32C specific command line options:\n")); | |
141 | } | |
142 | ||
143 | static void | |
144 | s_bss (int ignore ATTRIBUTE_UNUSED) | |
145 | { | |
146 | int temp; | |
147 | ||
148 | temp = get_absolute_expression (); | |
149 | subseg_set (bss_section, (subsegT) temp); | |
150 | demand_empty_rest_of_line (); | |
151 | } | |
152 | ||
153 | /* The target specific pseudo-ops which we support. */ | |
154 | const pseudo_typeS md_pseudo_table[] = | |
155 | { | |
156 | { "bss", s_bss, 0}, | |
157 | { "word", cons, 4 }, | |
158 | { NULL, NULL, 0 } | |
159 | }; | |
160 | ||
161 | \f | |
162 | void | |
163 | md_begin (void) | |
164 | { | |
165 | /* Initialize the `cgen' interface. */ | |
6772dd07 | 166 | |
49f58d10 JB |
167 | /* Set the machine number and endian. */ |
168 | gas_cgen_cpu_desc = m32c_cgen_cpu_open (CGEN_CPU_OPEN_MACHS, cpu_mach, | |
169 | CGEN_CPU_OPEN_ENDIAN, | |
170 | CGEN_ENDIAN_BIG, | |
4fb1e3d3 | 171 | CGEN_CPU_OPEN_ISAS, & m32c_isa, |
49f58d10 JB |
172 | CGEN_CPU_OPEN_END); |
173 | ||
174 | m32c_cgen_init_asm (gas_cgen_cpu_desc); | |
175 | ||
176 | /* This is a callback from cgen to gas to parse operands. */ | |
177 | cgen_set_parse_operand_fn (gas_cgen_cpu_desc, gas_cgen_parse_operand); | |
178 | ||
179 | /* Set the ELF flags if desired. */ | |
180 | if (m32c_flags) | |
181 | bfd_set_private_flags (stdoutput, m32c_flags); | |
182 | ||
183 | /* Set the machine type */ | |
184 | bfd_default_set_arch_mach (stdoutput, bfd_arch_m32c, m32c_mach); | |
185 | ||
186 | insn_size = 0; | |
187 | } | |
188 | ||
189 | void | |
190 | m32c_md_end (void) | |
191 | { | |
192 | int i, n_nops; | |
193 | ||
bbc434cb DD |
194 | if (bfd_get_section_flags (stdoutput, now_seg) & SEC_CODE) |
195 | { | |
196 | /* Pad with nops for objdump. */ | |
197 | n_nops = (32 - ((insn_size) % 32)) / 8; | |
198 | for (i = 1; i <= n_nops; i++) | |
199 | md_assemble ("nop"); | |
200 | } | |
49f58d10 JB |
201 | } |
202 | ||
203 | void | |
204 | m32c_start_line_hook (void) | |
205 | { | |
206 | #if 0 /* not necessary....handled in the .cpu file */ | |
207 | char *s = input_line_pointer; | |
208 | char *sg; | |
209 | ||
210 | for (s = input_line_pointer ; s && s[0] != '\n'; s++) | |
211 | { | |
212 | if (s[0] == ':') | |
213 | { | |
214 | /* Remove :g suffix. Squeeze out blanks. */ | |
215 | if (s[1] == 'g') | |
216 | { | |
217 | for (sg = s - 1; sg && sg >= input_line_pointer; sg--) | |
218 | { | |
219 | sg[2] = sg[0]; | |
220 | } | |
221 | sg[1] = ' '; | |
222 | sg[2] = ' '; | |
223 | input_line_pointer += 2; | |
224 | } | |
225 | } | |
226 | } | |
227 | #endif | |
228 | } | |
229 | ||
230 | /* Process [[indirect-operands]] in instruction str. */ | |
231 | ||
232 | static bfd_boolean | |
233 | m32c_indirect_operand (char *str) | |
234 | { | |
235 | char *new_str; | |
236 | char *s; | |
237 | char *ns; | |
238 | int ns_len; | |
239 | char *ns_end; | |
240 | enum indirect_type {none, relative, absolute} ; | |
241 | enum indirect_type indirection [3] = { none, none, none }; | |
242 | int brace_n [3] = { 0, 0, 0 }; | |
243 | int operand; | |
244 | ||
245 | s = str; | |
246 | operand = 1; | |
247 | for (s = str; *s; s++) | |
248 | { | |
249 | if (s[0] == ',') | |
250 | operand = 2; | |
251 | /* [abs] where abs is not a0 or a1 */ | |
252 | if (s[1] == '[' && ! (s[2] == 'a' && (s[3] == '0' || s[3] == '1')) | |
253 | && (ISBLANK (s[0]) || s[0] == ',')) | |
254 | indirection[operand] = absolute; | |
255 | if (s[0] == ']' && s[1] == ']') | |
256 | indirection[operand] = relative; | |
257 | if (s[0] == '[' && s[1] == '[') | |
258 | indirection[operand] = relative; | |
259 | } | |
260 | ||
261 | if (indirection[1] == none && indirection[2] == none) | |
262 | return FALSE; | |
263 | ||
264 | operand = 1; | |
265 | ns_len = strlen (str); | |
266 | new_str = (char*) xmalloc (ns_len); | |
267 | ns = new_str; | |
268 | ns_end = ns + ns_len; | |
269 | ||
270 | for (s = str; *s; s++) | |
271 | { | |
272 | if (s[0] == ',') | |
273 | operand = 2; | |
274 | ||
275 | if (s[0] == '[' && ! brace_n[operand]) | |
276 | { | |
277 | brace_n[operand] += 1; | |
278 | /* Squeeze [[ to [ if this is an indirect operand. */ | |
279 | if (indirection[operand] != none) | |
280 | continue; | |
281 | } | |
282 | ||
283 | else if (s[0] == '[' && brace_n[operand]) | |
284 | { | |
285 | brace_n[operand] += 1; | |
286 | } | |
287 | else if (s[0] == ']' && s[1] == ']' && indirection[operand] == relative) | |
288 | { | |
289 | s += 1; /* skip one ]. */ | |
290 | brace_n[operand] -= 2; /* allow for 2 [. */ | |
291 | } | |
292 | else if (s[0] == ']' && indirection[operand] == absolute) | |
293 | { | |
294 | brace_n[operand] -= 1; | |
295 | continue; /* skip closing ]. */ | |
296 | } | |
297 | else if (s[0] == ']') | |
298 | { | |
299 | brace_n[operand] -= 1; | |
300 | } | |
301 | *ns = s[0]; | |
302 | ns += 1; | |
303 | if (ns >= ns_end) | |
304 | return FALSE; | |
305 | if (s[0] == 0) | |
306 | break; | |
307 | } | |
308 | *ns = '\0'; | |
309 | for (operand = 1; operand <= 2; operand++) | |
310 | if (brace_n[operand]) | |
311 | { | |
312 | fprintf (stderr, "Unmatched [[operand-%d]] %d\n", operand, brace_n[operand]); | |
313 | } | |
314 | ||
315 | if (indirection[1] != none && indirection[2] != none) | |
316 | md_assemble ("src-dest-indirect"); | |
317 | else if (indirection[1] != none) | |
318 | md_assemble ("src-indirect"); | |
319 | else if (indirection[2] != none) | |
320 | md_assemble ("dest-indirect"); | |
321 | ||
322 | md_assemble (new_str); | |
323 | free (new_str); | |
324 | return TRUE; | |
325 | } | |
326 | ||
327 | void | |
328 | md_assemble (char * str) | |
329 | { | |
330 | static int last_insn_had_delay_slot = 0; | |
331 | m32c_insn insn; | |
332 | char * errmsg; | |
6772dd07 DD |
333 | finished_insnS results; |
334 | int rl_type; | |
49f58d10 JB |
335 | |
336 | if (m32c_mach == bfd_mach_m32c && m32c_indirect_operand (str)) | |
337 | return; | |
338 | ||
339 | /* Initialize GAS's cgen interface for a new instruction. */ | |
340 | gas_cgen_init_parse (); | |
341 | ||
342 | insn.insn = m32c_cgen_assemble_insn | |
343 | (gas_cgen_cpu_desc, str, & insn.fields, insn.buffer, & errmsg); | |
344 | ||
345 | if (!insn.insn) | |
346 | { | |
6b73c529 | 347 | as_bad ("%s", errmsg); |
49f58d10 JB |
348 | return; |
349 | } | |
350 | ||
6772dd07 | 351 | results.num_fixups = 0; |
49f58d10 JB |
352 | /* Doesn't really matter what we pass for RELAX_P here. */ |
353 | gas_cgen_finish_insn (insn.insn, insn.buffer, | |
6772dd07 | 354 | CGEN_FIELDS_BITSIZE (& insn.fields), 1, &results); |
49f58d10 JB |
355 | |
356 | last_insn_had_delay_slot | |
357 | = CGEN_INSN_ATTR_VALUE (insn.insn, CGEN_INSN_DELAY_SLOT); | |
358 | insn_size = CGEN_INSN_BITSIZE(insn.insn); | |
6772dd07 DD |
359 | |
360 | rl_type = rl_for (insn); | |
361 | ||
362 | /* We have to mark all the jumps, because we need to adjust them | |
363 | when we delete bytes, but we only need to mark the displacements | |
364 | if they're symbolic - if they're not, we've already picked the | |
365 | shortest opcode by now. The linker, however, will still have to | |
366 | check any operands to see if they're the displacement type, since | |
367 | we don't know (nor record) *which* operands are relaxable. */ | |
368 | if (m32c_relax | |
369 | && rl_type != RL_TYPE_NONE | |
370 | && (rl_type == RL_TYPE_JUMP || results.num_fixups) | |
371 | && !relaxable (insn)) | |
372 | { | |
373 | int reloc = 0; | |
374 | int addend = results.num_fixups + 16 * insn_size/8; | |
375 | ||
376 | switch (rl_for (insn)) | |
377 | { | |
378 | case RL_TYPE_JUMP: reloc = BFD_RELOC_M32C_RL_JUMP; break; | |
379 | case RL_TYPE_1ADDR: reloc = BFD_RELOC_M32C_RL_1ADDR; break; | |
380 | case RL_TYPE_2ADDR: reloc = BFD_RELOC_M32C_RL_2ADDR; break; | |
381 | } | |
382 | if (insn.insn->base->num == M32C_INSN_JMP16_S | |
383 | || insn.insn->base->num == M32C_INSN_JMP32_S) | |
384 | addend = 0x10; | |
385 | ||
386 | fix_new (results.frag, | |
387 | results.addr - results.frag->fr_literal, | |
388 | 0, abs_section_sym, addend, 0, | |
389 | reloc); | |
390 | } | |
49f58d10 JB |
391 | } |
392 | ||
393 | /* The syntax in the manual says constants begin with '#'. | |
394 | We just ignore it. */ | |
395 | ||
396 | void | |
397 | md_operand (expressionS * exp) | |
398 | { | |
399 | /* In case of a syntax error, escape back to try next syntax combo. */ | |
400 | if (exp->X_op == O_absent) | |
401 | gas_cgen_md_operand (exp); | |
402 | } | |
403 | ||
404 | valueT | |
405 | md_section_align (segT segment, valueT size) | |
406 | { | |
407 | int align = bfd_get_section_alignment (stdoutput, segment); | |
408 | return ((size + (1 << align) - 1) & (-1 << align)); | |
409 | } | |
410 | ||
411 | symbolS * | |
412 | md_undefined_symbol (char * name ATTRIBUTE_UNUSED) | |
413 | { | |
414 | return 0; | |
415 | } | |
416 | \f | |
417 | const relax_typeS md_relax_table[] = | |
418 | { | |
419 | /* The fields are: | |
420 | 1) most positive reach of this state, | |
421 | 2) most negative reach of this state, | |
422 | 3) how many bytes this mode will have in the variable part of the frag | |
423 | 4) which index into the table to try if we can't fit into this one. */ | |
424 | ||
425 | /* 0 */ { 0, 0, 0, 0 }, /* unused */ | |
426 | /* 1 */ { 0, 0, 0, 0 }, /* marker for "don't know yet" */ | |
427 | ||
428 | /* 2 */ { 127, -128, 2, 3 }, /* jcnd16_5.b */ | |
429 | /* 3 */ { 32767, -32768, 5, 4 }, /* jcnd16_5.w */ | |
430 | /* 4 */ { 0, 0, 6, 0 }, /* jcnd16_5.a */ | |
431 | ||
432 | /* 5 */ { 127, -128, 2, 6 }, /* jcnd16.b */ | |
433 | /* 6 */ { 32767, -32768, 5, 7 }, /* jcnd16.w */ | |
434 | /* 7 */ { 0, 0, 6, 0 }, /* jcnd16.a */ | |
435 | ||
436 | /* 8 */ { 8, 1, 1, 9 }, /* jmp16.s */ | |
437 | /* 9 */ { 127, -128, 2, 10 }, /* jmp16.b */ | |
438 | /* 10 */ { 32767, -32768, 3, 11 }, /* jmp16.w */ | |
439 | /* 11 */ { 0, 0, 4, 0 }, /* jmp16.a */ | |
440 | ||
441 | /* 12 */ { 127, -128, 2, 13 }, /* jcnd32.b */ | |
442 | /* 13 */ { 32767, -32768, 5, 14 }, /* jcnd32.w */ | |
443 | /* 14 */ { 0, 0, 6, 0 }, /* jcnd32.a */ | |
444 | ||
445 | /* 15 */ { 8, 1, 1, 16 }, /* jmp32.s */ | |
446 | /* 16 */ { 127, -128, 2, 17 }, /* jmp32.b */ | |
447 | /* 17 */ { 32767, -32768, 3, 18 }, /* jmp32.w */ | |
d14c4fad DD |
448 | /* 18 */ { 0, 0, 4, 0 }, /* jmp32.a */ |
449 | ||
450 | /* 19 */ { 32767, -32768, 3, 20 }, /* jsr16.w */ | |
451 | /* 20 */ { 0, 0, 4, 0 }, /* jsr16.a */ | |
452 | /* 21 */ { 32767, -32768, 3, 11 }, /* jsr32.w */ | |
453 | /* 22 */ { 0, 0, 4, 0 } /* jsr32.a */ | |
49f58d10 JB |
454 | }; |
455 | ||
456 | enum { | |
457 | M32C_MACRO_JCND16_5_W, | |
458 | M32C_MACRO_JCND16_5_A, | |
459 | M32C_MACRO_JCND16_W, | |
460 | M32C_MACRO_JCND16_A, | |
461 | M32C_MACRO_JCND32_W, | |
462 | M32C_MACRO_JCND32_A, | |
463 | } M32C_Macros; | |
464 | ||
465 | static struct { | |
466 | int insn; | |
467 | int bytes; | |
468 | int insn_for_extern; | |
469 | int pcrel_aim_offset; | |
470 | } subtype_mappings[] = { | |
471 | /* 0 */ { 0, 0, 0, 0 }, | |
472 | /* 1 */ { 0, 0, 0, 0 }, | |
473 | ||
474 | /* 2 */ { M32C_INSN_JCND16_5, 2, -M32C_MACRO_JCND16_5_A, 1 }, | |
475 | /* 3 */ { -M32C_MACRO_JCND16_5_W, 5, -M32C_MACRO_JCND16_5_A, 4 }, | |
476 | /* 4 */ { -M32C_MACRO_JCND16_5_A, 6, -M32C_MACRO_JCND16_5_A, 0 }, | |
477 | ||
478 | /* 5 */ { M32C_INSN_JCND16, 3, -M32C_MACRO_JCND16_A, 1 }, | |
479 | /* 6 */ { -M32C_MACRO_JCND16_W, 6, -M32C_MACRO_JCND16_A, 4 }, | |
480 | /* 7 */ { -M32C_MACRO_JCND16_A, 7, -M32C_MACRO_JCND16_A, 0 }, | |
481 | ||
482 | /* 8 */ { M32C_INSN_JMP16_S, 1, M32C_INSN_JMP16_A, 0 }, | |
483 | /* 9 */ { M32C_INSN_JMP16_B, 2, M32C_INSN_JMP16_A, 1 }, | |
484 | /* 10 */ { M32C_INSN_JMP16_W, 3, M32C_INSN_JMP16_A, 2 }, | |
485 | /* 11 */ { M32C_INSN_JMP16_A, 4, M32C_INSN_JMP16_A, 0 }, | |
486 | ||
487 | /* 12 */ { M32C_INSN_JCND32, 2, -M32C_MACRO_JCND32_A, 1 }, | |
488 | /* 13 */ { -M32C_MACRO_JCND32_W, 5, -M32C_MACRO_JCND32_A, 4 }, | |
489 | /* 14 */ { -M32C_MACRO_JCND32_A, 6, -M32C_MACRO_JCND32_A, 0 }, | |
490 | ||
491 | /* 15 */ { M32C_INSN_JMP32_S, 1, M32C_INSN_JMP32_A, 0 }, | |
492 | /* 16 */ { M32C_INSN_JMP32_B, 2, M32C_INSN_JMP32_A, 1 }, | |
493 | /* 17 */ { M32C_INSN_JMP32_W, 3, M32C_INSN_JMP32_A, 2 }, | |
d14c4fad DD |
494 | /* 18 */ { M32C_INSN_JMP32_A, 4, M32C_INSN_JMP32_A, 0 }, |
495 | ||
496 | /* 19 */ { M32C_INSN_JSR16_W, 3, M32C_INSN_JSR16_A, 2 }, | |
497 | /* 20 */ { M32C_INSN_JSR16_A, 4, M32C_INSN_JSR16_A, 0 }, | |
498 | /* 21 */ { M32C_INSN_JSR32_W, 3, M32C_INSN_JSR32_A, 2 }, | |
499 | /* 22 */ { M32C_INSN_JSR32_A, 4, M32C_INSN_JSR32_A, 0 } | |
49f58d10 JB |
500 | }; |
501 | #define NUM_MAPPINGS (sizeof (subtype_mappings) / sizeof (subtype_mappings[0])) | |
502 | ||
503 | void | |
504 | m32c_prepare_relax_scan (fragS *fragP, offsetT *aim, relax_substateT this_state) | |
505 | { | |
506 | symbolS *symbolP = fragP->fr_symbol; | |
507 | if (symbolP && !S_IS_DEFINED (symbolP)) | |
508 | *aim = 0; | |
509 | /* Adjust for m32c pcrel not being relative to the next opcode. */ | |
510 | *aim += subtype_mappings[this_state].pcrel_aim_offset; | |
511 | } | |
512 | ||
513 | static int | |
514 | insn_to_subtype (int insn) | |
515 | { | |
516 | unsigned int i; | |
517 | for (i=0; i<NUM_MAPPINGS; i++) | |
518 | if (insn == subtype_mappings[i].insn) | |
519 | { | |
520 | /*printf("mapping %d used\n", i);*/ | |
521 | return i; | |
522 | } | |
523 | abort (); | |
524 | } | |
525 | ||
526 | /* Return an initial guess of the length by which a fragment must grow to | |
527 | hold a branch to reach its destination. | |
528 | Also updates fr_type/fr_subtype as necessary. | |
529 | ||
530 | Called just before doing relaxation. | |
531 | Any symbol that is now undefined will not become defined. | |
532 | The guess for fr_var is ACTUALLY the growth beyond fr_fix. | |
533 | Whatever we do to grow fr_fix or fr_var contributes to our returned value. | |
534 | Although it may not be explicit in the frag, pretend fr_var starts with a | |
535 | 0 value. */ | |
536 | ||
537 | int | |
538 | md_estimate_size_before_relax (fragS * fragP, segT segment ATTRIBUTE_UNUSED) | |
539 | { | |
540 | int where = fragP->fr_opcode - fragP->fr_literal; | |
541 | ||
542 | if (fragP->fr_subtype == 1) | |
543 | fragP->fr_subtype = insn_to_subtype (fragP->fr_cgen.insn->base->num); | |
544 | ||
545 | if (S_GET_SEGMENT (fragP->fr_symbol) != segment) | |
546 | { | |
547 | int new_insn; | |
548 | ||
549 | new_insn = subtype_mappings[fragP->fr_subtype].insn_for_extern; | |
550 | fragP->fr_subtype = insn_to_subtype (new_insn); | |
551 | } | |
552 | ||
553 | if (fragP->fr_cgen.insn->base | |
554 | && fragP->fr_cgen.insn->base->num | |
555 | != subtype_mappings[fragP->fr_subtype].insn | |
556 | && subtype_mappings[fragP->fr_subtype].insn > 0) | |
557 | { | |
558 | int new_insn= subtype_mappings[fragP->fr_subtype].insn; | |
559 | if (new_insn >= 0) | |
560 | { | |
561 | fragP->fr_cgen.insn = (fragP->fr_cgen.insn | |
562 | - fragP->fr_cgen.insn->base->num | |
563 | + new_insn); | |
564 | } | |
565 | } | |
566 | ||
567 | return subtype_mappings[fragP->fr_subtype].bytes - (fragP->fr_fix - where); | |
568 | } | |
569 | ||
570 | /* *fragP has been relaxed to its final size, and now needs to have | |
571 | the bytes inside it modified to conform to the new size. | |
572 | ||
573 | Called after relaxation is finished. | |
574 | fragP->fr_type == rs_machine_dependent. | |
575 | fragP->fr_subtype is the subtype of what the address relaxed to. */ | |
576 | ||
577 | static int | |
578 | target_address_for (fragS *frag) | |
579 | { | |
580 | int rv = frag->fr_offset; | |
581 | symbolS *sym = frag->fr_symbol; | |
582 | ||
583 | if (sym) | |
584 | rv += S_GET_VALUE (sym); | |
585 | ||
586 | /*printf("target_address_for returns %d\n", rv);*/ | |
587 | return rv; | |
588 | } | |
589 | ||
590 | void | |
591 | md_convert_frag (bfd * abfd ATTRIBUTE_UNUSED, | |
592 | segT sec ATTRIBUTE_UNUSED, | |
593 | fragS * fragP ATTRIBUTE_UNUSED) | |
594 | { | |
595 | int addend; | |
596 | int operand; | |
597 | int new_insn; | |
598 | int where = fragP->fr_opcode - fragP->fr_literal; | |
6772dd07 | 599 | int rl_where = fragP->fr_opcode - fragP->fr_literal; |
49f58d10 | 600 | unsigned char *op = (unsigned char *)fragP->fr_opcode; |
6772dd07 DD |
601 | int op_base = 0; |
602 | int op_op = 0; | |
603 | int rl_addend = 0; | |
49f58d10 JB |
604 | |
605 | addend = target_address_for (fragP) - (fragP->fr_address + where); | |
606 | new_insn = subtype_mappings[fragP->fr_subtype].insn; | |
607 | ||
608 | fragP->fr_fix = where + subtype_mappings[fragP->fr_subtype].bytes; | |
609 | ||
6772dd07 DD |
610 | op_base = 0; |
611 | ||
49f58d10 JB |
612 | switch (subtype_mappings[fragP->fr_subtype].insn) |
613 | { | |
614 | case M32C_INSN_JCND16_5: | |
615 | op[1] = addend - 1; | |
616 | operand = M32C_OPERAND_LAB_8_8; | |
6772dd07 DD |
617 | op_op = 1; |
618 | rl_addend = 0x21; | |
49f58d10 JB |
619 | break; |
620 | ||
621 | case -M32C_MACRO_JCND16_5_W: | |
622 | op[0] ^= 0x04; | |
623 | op[1] = 4; | |
624 | op[2] = 0xf4; | |
625 | op[3] = addend - 3; | |
626 | op[4] = (addend - 3) >> 8; | |
627 | operand = M32C_OPERAND_LAB_8_16; | |
628 | where += 2; | |
629 | new_insn = M32C_INSN_JMP16_W; | |
6772dd07 DD |
630 | op_base = 2; |
631 | op_op = 3; | |
632 | rl_addend = 0x51; | |
49f58d10 JB |
633 | break; |
634 | ||
635 | case -M32C_MACRO_JCND16_5_A: | |
636 | op[0] ^= 0x04; | |
637 | op[1] = 5; | |
638 | op[2] = 0xfc; | |
639 | operand = M32C_OPERAND_LAB_8_24; | |
640 | where += 2; | |
641 | new_insn = M32C_INSN_JMP16_A; | |
6772dd07 DD |
642 | op_base = 2; |
643 | op_op = 3; | |
644 | rl_addend = 0x61; | |
49f58d10 JB |
645 | break; |
646 | ||
647 | ||
648 | case M32C_INSN_JCND16: | |
649 | op[2] = addend - 2; | |
650 | operand = M32C_OPERAND_LAB_16_8; | |
6772dd07 DD |
651 | op_base = 0; |
652 | op_op = 2; | |
653 | rl_addend = 0x31; | |
49f58d10 JB |
654 | break; |
655 | ||
656 | case -M32C_MACRO_JCND16_W: | |
657 | op[1] ^= 0x04; | |
658 | op[2] = 4; | |
659 | op[3] = 0xf4; | |
660 | op[4] = addend - 4; | |
661 | op[5] = (addend - 4) >> 8; | |
662 | operand = M32C_OPERAND_LAB_8_16; | |
663 | where += 3; | |
664 | new_insn = M32C_INSN_JMP16_W; | |
6772dd07 DD |
665 | op_base = 3; |
666 | op_op = 4; | |
667 | rl_addend = 0x61; | |
49f58d10 JB |
668 | break; |
669 | ||
670 | case -M32C_MACRO_JCND16_A: | |
671 | op[1] ^= 0x04; | |
672 | op[2] = 5; | |
673 | op[3] = 0xfc; | |
674 | operand = M32C_OPERAND_LAB_8_24; | |
675 | where += 3; | |
676 | new_insn = M32C_INSN_JMP16_A; | |
6772dd07 DD |
677 | op_base = 3; |
678 | op_op = 4; | |
679 | rl_addend = 0x71; | |
49f58d10 JB |
680 | break; |
681 | ||
682 | case M32C_INSN_JMP16_S: | |
683 | op[0] = 0x60 | ((addend-2) & 0x07); | |
684 | operand = M32C_OPERAND_LAB_5_3; | |
6772dd07 DD |
685 | op_base = 0; |
686 | op_op = 0; | |
687 | rl_addend = 0x10; | |
49f58d10 JB |
688 | break; |
689 | ||
690 | case M32C_INSN_JMP16_B: | |
691 | op[0] = 0xfe; | |
692 | op[1] = addend - 1; | |
693 | operand = M32C_OPERAND_LAB_8_8; | |
6772dd07 DD |
694 | op_base = 0; |
695 | op_op = 1; | |
696 | rl_addend = 0x21; | |
49f58d10 JB |
697 | break; |
698 | ||
699 | case M32C_INSN_JMP16_W: | |
700 | op[0] = 0xf4; | |
701 | op[1] = addend - 1; | |
702 | op[2] = (addend - 1) >> 8; | |
703 | operand = M32C_OPERAND_LAB_8_16; | |
6772dd07 DD |
704 | op_base = 0; |
705 | op_op = 1; | |
706 | rl_addend = 0x31; | |
49f58d10 JB |
707 | break; |
708 | ||
709 | case M32C_INSN_JMP16_A: | |
710 | op[0] = 0xfc; | |
711 | op[1] = 0; | |
712 | op[2] = 0; | |
713 | op[3] = 0; | |
714 | operand = M32C_OPERAND_LAB_8_24; | |
6772dd07 DD |
715 | op_base = 0; |
716 | op_op = 1; | |
717 | rl_addend = 0x41; | |
49f58d10 JB |
718 | break; |
719 | ||
720 | case M32C_INSN_JCND32: | |
721 | op[1] = addend - 1; | |
722 | operand = M32C_OPERAND_LAB_8_8; | |
6772dd07 DD |
723 | op_base = 0; |
724 | op_op = 1; | |
725 | rl_addend = 0x21; | |
49f58d10 JB |
726 | break; |
727 | ||
728 | case -M32C_MACRO_JCND32_W: | |
729 | op[0] ^= 0x40; | |
730 | op[1] = 4; | |
731 | op[2] = 0xce; | |
732 | op[3] = addend - 3; | |
733 | op[4] = (addend - 3) >> 8; | |
734 | operand = M32C_OPERAND_LAB_8_16; | |
735 | where += 2; | |
736 | new_insn = M32C_INSN_JMP32_W; | |
6772dd07 DD |
737 | op_base = 2; |
738 | op_op = 3; | |
739 | rl_addend = 0x51; | |
49f58d10 JB |
740 | break; |
741 | ||
742 | case -M32C_MACRO_JCND32_A: | |
743 | op[0] ^= 0x40; | |
744 | op[1] = 5; | |
745 | op[2] = 0xcc; | |
746 | operand = M32C_OPERAND_LAB_8_24; | |
747 | where += 2; | |
748 | new_insn = M32C_INSN_JMP32_A; | |
6772dd07 DD |
749 | op_base = 2; |
750 | op_op = 3; | |
751 | rl_addend = 0x61; | |
49f58d10 JB |
752 | break; |
753 | ||
754 | ||
755 | ||
756 | case M32C_INSN_JMP32_S: | |
757 | addend = ((addend-2) & 0x07); | |
758 | op[0] = 0x4a | (addend & 0x01) | ((addend << 3) & 0x30); | |
759 | operand = M32C_OPERAND_LAB32_JMP_S; | |
6772dd07 DD |
760 | op_base = 0; |
761 | op_op = 0; | |
762 | rl_addend = 0x10; | |
49f58d10 JB |
763 | break; |
764 | ||
765 | case M32C_INSN_JMP32_B: | |
766 | op[0] = 0xbb; | |
767 | op[1] = addend - 1; | |
768 | operand = M32C_OPERAND_LAB_8_8; | |
6772dd07 DD |
769 | op_base = 0; |
770 | op_op = 1; | |
771 | rl_addend = 0x21; | |
49f58d10 JB |
772 | break; |
773 | ||
774 | case M32C_INSN_JMP32_W: | |
775 | op[0] = 0xce; | |
776 | op[1] = addend - 1; | |
777 | op[2] = (addend - 1) >> 8; | |
778 | operand = M32C_OPERAND_LAB_8_16; | |
6772dd07 DD |
779 | op_base = 0; |
780 | op_op = 1; | |
781 | rl_addend = 0x31; | |
49f58d10 JB |
782 | break; |
783 | ||
784 | case M32C_INSN_JMP32_A: | |
785 | op[0] = 0xcc; | |
786 | op[1] = 0; | |
787 | op[2] = 0; | |
788 | op[3] = 0; | |
789 | operand = M32C_OPERAND_LAB_8_24; | |
6772dd07 DD |
790 | op_base = 0; |
791 | op_op = 1; | |
792 | rl_addend = 0x41; | |
49f58d10 JB |
793 | break; |
794 | ||
795 | ||
d14c4fad DD |
796 | case M32C_INSN_JSR16_W: |
797 | op[0] = 0xf5; | |
798 | op[1] = addend - 1; | |
799 | op[2] = (addend - 1) >> 8; | |
800 | operand = M32C_OPERAND_LAB_8_16; | |
6772dd07 DD |
801 | op_base = 0; |
802 | op_op = 1; | |
803 | rl_addend = 0x31; | |
d14c4fad DD |
804 | break; |
805 | ||
806 | case M32C_INSN_JSR16_A: | |
807 | op[0] = 0xfd; | |
808 | op[1] = 0; | |
809 | op[2] = 0; | |
810 | op[3] = 0; | |
811 | operand = M32C_OPERAND_LAB_8_24; | |
6772dd07 DD |
812 | op_base = 0; |
813 | op_op = 1; | |
814 | rl_addend = 0x41; | |
d14c4fad DD |
815 | break; |
816 | ||
817 | case M32C_INSN_JSR32_W: | |
818 | op[0] = 0xcf; | |
819 | op[1] = addend - 1; | |
820 | op[2] = (addend - 1) >> 8; | |
821 | operand = M32C_OPERAND_LAB_8_16; | |
6772dd07 DD |
822 | op_base = 0; |
823 | op_op = 1; | |
824 | rl_addend = 0x31; | |
d14c4fad DD |
825 | break; |
826 | ||
827 | case M32C_INSN_JSR32_A: | |
828 | op[0] = 0xcd; | |
829 | op[1] = 0; | |
830 | op[2] = 0; | |
831 | op[3] = 0; | |
832 | operand = M32C_OPERAND_LAB_8_24; | |
6772dd07 DD |
833 | op_base = 0; |
834 | op_op = 1; | |
835 | rl_addend = 0x41; | |
d14c4fad DD |
836 | break; |
837 | ||
838 | ||
839 | ||
49f58d10 JB |
840 | default: |
841 | printf("\nHey! Need more opcode converters! missing: %d %s\n\n", | |
842 | fragP->fr_subtype, | |
843 | fragP->fr_cgen.insn->base->name); | |
844 | abort(); | |
845 | } | |
846 | ||
6772dd07 DD |
847 | if (m32c_relax) |
848 | { | |
849 | if (operand != M32C_OPERAND_LAB_8_24) | |
850 | fragP->fr_offset = (fragP->fr_address + where); | |
851 | ||
852 | fix_new (fragP, | |
853 | rl_where, | |
854 | 0, abs_section_sym, rl_addend, 0, | |
855 | BFD_RELOC_M32C_RL_JUMP); | |
856 | } | |
857 | ||
49f58d10 | 858 | if (S_GET_SEGMENT (fragP->fr_symbol) != sec |
6772dd07 DD |
859 | || operand == M32C_OPERAND_LAB_8_24 |
860 | || (m32c_relax && (operand != M32C_OPERAND_LAB_5_3 | |
861 | && operand != M32C_OPERAND_LAB32_JMP_S))) | |
49f58d10 JB |
862 | { |
863 | assert (fragP->fr_cgen.insn != 0); | |
864 | gas_cgen_record_fixup (fragP, | |
865 | where, | |
866 | fragP->fr_cgen.insn, | |
867 | (fragP->fr_fix - where) * 8, | |
868 | cgen_operand_lookup_by_num (gas_cgen_cpu_desc, | |
869 | operand), | |
870 | fragP->fr_cgen.opinfo, | |
871 | fragP->fr_symbol, fragP->fr_offset); | |
872 | } | |
873 | } | |
874 | \f | |
875 | /* Functions concerning relocs. */ | |
876 | ||
877 | /* The location from which a PC relative jump should be calculated, | |
878 | given a PC relative reloc. */ | |
879 | ||
880 | long | |
881 | md_pcrel_from_section (fixS * fixP, segT sec) | |
882 | { | |
883 | if (fixP->fx_addsy != (symbolS *) NULL | |
884 | && (! S_IS_DEFINED (fixP->fx_addsy) | |
885 | || S_GET_SEGMENT (fixP->fx_addsy) != sec)) | |
886 | /* The symbol is undefined (or is defined but not in this section). | |
887 | Let the linker figure it out. */ | |
888 | return 0; | |
889 | ||
890 | return (fixP->fx_frag->fr_address + fixP->fx_where); | |
891 | } | |
892 | ||
893 | /* Return the bfd reloc type for OPERAND of INSN at fixup FIXP. | |
894 | Returns BFD_RELOC_NONE if no reloc type can be found. | |
895 | *FIXP may be modified if desired. */ | |
896 | ||
897 | bfd_reloc_code_real_type | |
898 | md_cgen_lookup_reloc (const CGEN_INSN * insn ATTRIBUTE_UNUSED, | |
899 | const CGEN_OPERAND * operand, | |
900 | fixS * fixP ATTRIBUTE_UNUSED) | |
901 | { | |
902 | static const struct op_reloc { | |
903 | /* A CGEN operand type that can be a relocatable expression. */ | |
904 | CGEN_OPERAND_TYPE operand; | |
905 | ||
906 | /* The appropriate BFD reloc type to use for that. */ | |
907 | bfd_reloc_code_real_type reloc; | |
908 | ||
909 | /* The offset from the start of the instruction to the field to be | |
910 | relocated, in bytes. */ | |
911 | int offset; | |
912 | } op_reloc_table[] = { | |
913 | ||
cab0a0db | 914 | /* PC-REL relocs for 8-bit fields. */ |
6772dd07 | 915 | { M32C_OPERAND_LAB_8_8, BFD_RELOC_8_PCREL, 1 }, |
cab0a0db DD |
916 | { M32C_OPERAND_LAB_16_8, BFD_RELOC_8_PCREL, 2 }, |
917 | { M32C_OPERAND_LAB_24_8, BFD_RELOC_8_PCREL, 3 }, | |
918 | { M32C_OPERAND_LAB_32_8, BFD_RELOC_8_PCREL, 4 }, | |
919 | { M32C_OPERAND_LAB_40_8, BFD_RELOC_8_PCREL, 5 }, | |
920 | ||
6772dd07 DD |
921 | /* PC-REL relocs for 16-bit fields. */ |
922 | { M32C_OPERAND_LAB_8_16, BFD_RELOC_16_PCREL, 1 }, | |
923 | ||
fd54057a DD |
924 | /* Absolute relocs for 8-bit fields. */ |
925 | { M32C_OPERAND_IMM_8_QI, BFD_RELOC_8, 1 }, | |
926 | { M32C_OPERAND_IMM_16_QI, BFD_RELOC_8, 2 }, | |
927 | { M32C_OPERAND_IMM_24_QI, BFD_RELOC_8, 3 }, | |
928 | { M32C_OPERAND_IMM_32_QI, BFD_RELOC_8, 4 }, | |
929 | { M32C_OPERAND_IMM_40_QI, BFD_RELOC_8, 5 }, | |
930 | { M32C_OPERAND_IMM_48_QI, BFD_RELOC_8, 6 }, | |
931 | { M32C_OPERAND_IMM_56_QI, BFD_RELOC_8, 7 }, | |
932 | { M32C_OPERAND_DSP_8_S8, BFD_RELOC_8, 1 }, | |
933 | { M32C_OPERAND_DSP_16_S8, BFD_RELOC_8, 2 }, | |
934 | { M32C_OPERAND_DSP_24_S8, BFD_RELOC_8, 3 }, | |
935 | { M32C_OPERAND_DSP_32_S8, BFD_RELOC_8, 4 }, | |
936 | { M32C_OPERAND_DSP_40_S8, BFD_RELOC_8, 5 }, | |
937 | { M32C_OPERAND_DSP_48_S8, BFD_RELOC_8, 6 }, | |
938 | { M32C_OPERAND_DSP_8_U8, BFD_RELOC_8, 1 }, | |
939 | { M32C_OPERAND_DSP_16_U8, BFD_RELOC_8, 2 }, | |
940 | { M32C_OPERAND_DSP_24_U8, BFD_RELOC_8, 3 }, | |
941 | { M32C_OPERAND_DSP_32_U8, BFD_RELOC_8, 4 }, | |
942 | { M32C_OPERAND_DSP_40_U8, BFD_RELOC_8, 5 }, | |
943 | { M32C_OPERAND_DSP_48_U8, BFD_RELOC_8, 6 }, | |
6b73c529 DD |
944 | { M32C_OPERAND_BITBASE32_16_S11_UNPREFIXED, BFD_RELOC_8, 2 }, |
945 | { M32C_OPERAND_BITBASE32_16_U11_UNPREFIXED, BFD_RELOC_8, 2 }, | |
946 | { M32C_OPERAND_BITBASE32_24_S11_PREFIXED, BFD_RELOC_8, 3 }, | |
947 | { M32C_OPERAND_BITBASE32_24_U11_PREFIXED, BFD_RELOC_8, 3 }, | |
fd54057a | 948 | |
49f58d10 | 949 | /* Absolute relocs for 16-bit fields. */ |
6b73c529 | 950 | { M32C_OPERAND_IMM_8_HI, BFD_RELOC_16, 1 }, |
49f58d10 JB |
951 | { M32C_OPERAND_IMM_16_HI, BFD_RELOC_16, 2 }, |
952 | { M32C_OPERAND_IMM_24_HI, BFD_RELOC_16, 3 }, | |
953 | { M32C_OPERAND_IMM_32_HI, BFD_RELOC_16, 4 }, | |
cab0a0db DD |
954 | { M32C_OPERAND_IMM_40_HI, BFD_RELOC_16, 5 }, |
955 | { M32C_OPERAND_IMM_48_HI, BFD_RELOC_16, 6 }, | |
956 | { M32C_OPERAND_IMM_56_HI, BFD_RELOC_16, 7 }, | |
957 | { M32C_OPERAND_IMM_64_HI, BFD_RELOC_16, 8 }, | |
49f58d10 JB |
958 | { M32C_OPERAND_DSP_16_S16, BFD_RELOC_16, 2 }, |
959 | { M32C_OPERAND_DSP_24_S16, BFD_RELOC_16, 3 }, | |
960 | { M32C_OPERAND_DSP_32_S16, BFD_RELOC_16, 4 }, | |
961 | { M32C_OPERAND_DSP_40_S16, BFD_RELOC_16, 5 }, | |
962 | { M32C_OPERAND_DSP_8_U16, BFD_RELOC_16, 1 }, | |
963 | { M32C_OPERAND_DSP_16_U16, BFD_RELOC_16, 2 }, | |
964 | { M32C_OPERAND_DSP_24_U16, BFD_RELOC_16, 3 }, | |
965 | { M32C_OPERAND_DSP_32_U16, BFD_RELOC_16, 4 }, | |
cab0a0db DD |
966 | { M32C_OPERAND_DSP_40_U16, BFD_RELOC_16, 5 }, |
967 | { M32C_OPERAND_DSP_48_U16, BFD_RELOC_16, 6 }, | |
6b73c529 DD |
968 | { M32C_OPERAND_BITBASE32_16_S19_UNPREFIXED, BFD_RELOC_16, 2 }, |
969 | { M32C_OPERAND_BITBASE32_16_U19_UNPREFIXED, BFD_RELOC_16, 2 }, | |
970 | { M32C_OPERAND_BITBASE32_24_S19_PREFIXED, BFD_RELOC_16, 3 }, | |
971 | { M32C_OPERAND_BITBASE32_24_U19_PREFIXED, BFD_RELOC_16, 3 }, | |
49f58d10 JB |
972 | |
973 | /* Absolute relocs for 24-bit fields. */ | |
974 | { M32C_OPERAND_LAB_8_24, BFD_RELOC_24, 1 }, | |
6b73c529 | 975 | { M32C_OPERAND_DSP_8_S24, BFD_RELOC_24, 1 }, |
cab0a0db | 976 | { M32C_OPERAND_DSP_8_U24, BFD_RELOC_24, 1 }, |
49f58d10 JB |
977 | { M32C_OPERAND_DSP_16_U24, BFD_RELOC_24, 2 }, |
978 | { M32C_OPERAND_DSP_24_U24, BFD_RELOC_24, 3 }, | |
979 | { M32C_OPERAND_DSP_32_U24, BFD_RELOC_24, 4 }, | |
980 | { M32C_OPERAND_DSP_40_U24, BFD_RELOC_24, 5 }, | |
cab0a0db DD |
981 | { M32C_OPERAND_DSP_48_U24, BFD_RELOC_24, 6 }, |
982 | { M32C_OPERAND_DSP_16_U20, BFD_RELOC_24, 2 }, | |
983 | { M32C_OPERAND_DSP_24_U20, BFD_RELOC_24, 3 }, | |
984 | { M32C_OPERAND_DSP_32_U20, BFD_RELOC_24, 4 }, | |
6b73c529 DD |
985 | { M32C_OPERAND_BITBASE32_16_U27_UNPREFIXED, BFD_RELOC_24, 2 }, |
986 | { M32C_OPERAND_BITBASE32_24_U27_PREFIXED, BFD_RELOC_24, 3 }, | |
49f58d10 JB |
987 | |
988 | /* Absolute relocs for 32-bit fields. */ | |
989 | { M32C_OPERAND_IMM_16_SI, BFD_RELOC_32, 2 }, | |
990 | { M32C_OPERAND_IMM_24_SI, BFD_RELOC_32, 3 }, | |
991 | { M32C_OPERAND_IMM_32_SI, BFD_RELOC_32, 4 }, | |
992 | { M32C_OPERAND_IMM_40_SI, BFD_RELOC_32, 5 }, | |
993 | ||
994 | }; | |
995 | ||
996 | int i; | |
997 | ||
998 | for (i = ARRAY_SIZE (op_reloc_table); --i >= 0; ) | |
999 | { | |
1000 | const struct op_reloc *or = &op_reloc_table[i]; | |
1001 | ||
1002 | if (or->operand == operand->type) | |
1003 | { | |
1004 | fixP->fx_where += or->offset; | |
1005 | fixP->fx_size -= or->offset; | |
fd54057a DD |
1006 | |
1007 | if (fixP->fx_cgen.opinfo | |
1008 | && fixP->fx_cgen.opinfo != BFD_RELOC_NONE) | |
1009 | return fixP->fx_cgen.opinfo; | |
1010 | ||
49f58d10 JB |
1011 | return or->reloc; |
1012 | } | |
1013 | } | |
1014 | ||
1015 | fprintf | |
1016 | (stderr, | |
cab0a0db DD |
1017 | "Error: tc-m32c.c:md_cgen_lookup_reloc Unimplemented relocation for operand %s\n", |
1018 | operand->name); | |
49f58d10 JB |
1019 | |
1020 | return BFD_RELOC_NONE; | |
1021 | } | |
1022 | ||
6772dd07 DD |
1023 | void |
1024 | m32c_apply_fix (struct fix *f, valueT *t, segT s) | |
1025 | { | |
1026 | if (f->fx_r_type == BFD_RELOC_M32C_RL_JUMP | |
1027 | || f->fx_r_type == BFD_RELOC_M32C_RL_1ADDR | |
1028 | || f->fx_r_type == BFD_RELOC_M32C_RL_2ADDR) | |
1029 | return; | |
1030 | gas_cgen_md_apply_fix (f, t, s); | |
1031 | } | |
1032 | ||
1033 | arelent * | |
1034 | tc_gen_reloc (asection *sec, fixS *fx) | |
1035 | { | |
1036 | if (fx->fx_r_type == BFD_RELOC_M32C_RL_JUMP | |
1037 | || fx->fx_r_type == BFD_RELOC_M32C_RL_1ADDR | |
1038 | || fx->fx_r_type == BFD_RELOC_M32C_RL_2ADDR) | |
1039 | { | |
1040 | arelent * reloc; | |
1041 | ||
1042 | reloc = xmalloc (sizeof (* reloc)); | |
1043 | ||
1044 | reloc->sym_ptr_ptr = xmalloc (sizeof (asymbol *)); | |
1045 | *reloc->sym_ptr_ptr = symbol_get_bfdsym (fx->fx_addsy); | |
1046 | reloc->address = fx->fx_frag->fr_address + fx->fx_where; | |
1047 | reloc->howto = bfd_reloc_type_lookup (stdoutput, fx->fx_r_type); | |
1048 | reloc->addend = fx->fx_offset; | |
1049 | return reloc; | |
1050 | ||
1051 | } | |
1052 | return gas_cgen_tc_gen_reloc (sec, fx); | |
1053 | } | |
1054 | ||
49f58d10 JB |
1055 | /* See whether we need to force a relocation into the output file. |
1056 | This is used to force out switch and PC relative relocations when | |
1057 | relaxing. */ | |
1058 | ||
1059 | int | |
1060 | m32c_force_relocation (fixS * fixp) | |
1061 | { | |
1062 | int reloc = fixp->fx_r_type; | |
1063 | ||
1064 | if (reloc > (int)BFD_RELOC_UNUSED) | |
1065 | { | |
1066 | reloc -= (int)BFD_RELOC_UNUSED; | |
1067 | switch (reloc) | |
1068 | { | |
1069 | case M32C_OPERAND_DSP_32_S16: | |
1070 | case M32C_OPERAND_DSP_32_U16: | |
1071 | case M32C_OPERAND_IMM_32_HI: | |
1072 | case M32C_OPERAND_DSP_16_S16: | |
1073 | case M32C_OPERAND_DSP_16_U16: | |
1074 | case M32C_OPERAND_IMM_16_HI: | |
1075 | case M32C_OPERAND_DSP_24_S16: | |
1076 | case M32C_OPERAND_DSP_24_U16: | |
1077 | case M32C_OPERAND_IMM_24_HI: | |
1078 | return 1; | |
6772dd07 DD |
1079 | |
1080 | /* If we're doing linker relaxing, we need to keep all the | |
1081 | pc-relative jumps in case we need to fix them due to | |
1082 | deleted bytes between the jump and its destination. */ | |
1083 | case M32C_OPERAND_LAB_8_8: | |
1084 | case M32C_OPERAND_LAB_8_16: | |
1085 | case M32C_OPERAND_LAB_8_24: | |
1086 | case M32C_OPERAND_LAB_16_8: | |
1087 | case M32C_OPERAND_LAB_24_8: | |
1088 | case M32C_OPERAND_LAB_32_8: | |
1089 | case M32C_OPERAND_LAB_40_8: | |
1090 | if (m32c_relax) | |
1091 | return 1; | |
1092 | default: | |
1093 | break; | |
49f58d10 JB |
1094 | } |
1095 | } | |
1096 | else | |
1097 | { | |
6772dd07 DD |
1098 | switch (fixp->fx_r_type) |
1099 | { | |
1100 | case BFD_RELOC_16: | |
1101 | return 1; | |
1102 | ||
1103 | case BFD_RELOC_M32C_RL_JUMP: | |
1104 | case BFD_RELOC_M32C_RL_1ADDR: | |
1105 | case BFD_RELOC_M32C_RL_2ADDR: | |
1106 | case BFD_RELOC_8_PCREL: | |
1107 | case BFD_RELOC_16_PCREL: | |
1108 | if (m32c_relax) | |
1109 | return 1; | |
1110 | default: | |
1111 | break; | |
1112 | } | |
49f58d10 JB |
1113 | } |
1114 | ||
1115 | return generic_force_reloc (fixp); | |
1116 | } | |
1117 | \f | |
1118 | /* Write a value out to the object file, using the appropriate endianness. */ | |
1119 | ||
1120 | void | |
1121 | md_number_to_chars (char * buf, valueT val, int n) | |
1122 | { | |
1123 | number_to_chars_littleendian (buf, val, n); | |
1124 | } | |
1125 | ||
1126 | /* Turn a string in input_line_pointer into a floating point constant of type | |
1127 | type, and store the appropriate bytes in *litP. The number of LITTLENUMS | |
1128 | emitted is stored in *sizeP . An error message is returned, or NULL on OK. */ | |
1129 | ||
1130 | /* Equal to MAX_PRECISION in atof-ieee.c. */ | |
1131 | #define MAX_LITTLENUMS 6 | |
1132 | ||
1133 | char * | |
1134 | md_atof (int type, char * litP, int * sizeP) | |
1135 | { | |
1136 | int i; | |
1137 | int prec; | |
1138 | LITTLENUM_TYPE words [MAX_LITTLENUMS]; | |
1139 | char * t; | |
1140 | ||
1141 | switch (type) | |
1142 | { | |
1143 | case 'f': | |
1144 | case 'F': | |
1145 | case 's': | |
1146 | case 'S': | |
1147 | prec = 2; | |
1148 | break; | |
1149 | ||
1150 | case 'd': | |
1151 | case 'D': | |
1152 | case 'r': | |
1153 | case 'R': | |
1154 | prec = 4; | |
1155 | break; | |
1156 | ||
1157 | /* FIXME: Some targets allow other format chars for bigger sizes here. */ | |
1158 | ||
1159 | default: | |
1160 | * sizeP = 0; | |
1161 | return _("Bad call to md_atof()"); | |
1162 | } | |
1163 | ||
1164 | t = atof_ieee (input_line_pointer, type, words); | |
1165 | if (t) | |
1166 | input_line_pointer = t; | |
1167 | * sizeP = prec * sizeof (LITTLENUM_TYPE); | |
1168 | ||
1169 | for (i = 0; i < prec; i++) | |
1170 | { | |
1171 | md_number_to_chars (litP, (valueT) words[i], | |
1172 | sizeof (LITTLENUM_TYPE)); | |
1173 | litP += sizeof (LITTLENUM_TYPE); | |
1174 | } | |
1175 | ||
1176 | return 0; | |
1177 | } | |
1178 | ||
1179 | bfd_boolean | |
1180 | m32c_fix_adjustable (fixS * fixP) | |
1181 | { | |
1182 | int reloc; | |
1183 | if (fixP->fx_addsy == NULL) | |
1184 | return 1; | |
1185 | ||
1186 | /* We need the symbol name for the VTABLE entries. */ | |
1187 | reloc = fixP->fx_r_type; | |
1188 | if (reloc > (int)BFD_RELOC_UNUSED) | |
1189 | { | |
1190 | reloc -= (int)BFD_RELOC_UNUSED; | |
1191 | switch (reloc) | |
1192 | { | |
1193 | case M32C_OPERAND_DSP_32_S16: | |
1194 | case M32C_OPERAND_DSP_32_U16: | |
1195 | case M32C_OPERAND_IMM_32_HI: | |
1196 | case M32C_OPERAND_DSP_16_S16: | |
1197 | case M32C_OPERAND_DSP_16_U16: | |
1198 | case M32C_OPERAND_IMM_16_HI: | |
1199 | case M32C_OPERAND_DSP_24_S16: | |
1200 | case M32C_OPERAND_DSP_24_U16: | |
1201 | case M32C_OPERAND_IMM_24_HI: | |
1202 | return 0; | |
1203 | } | |
1204 | } | |
1205 | else | |
1206 | { | |
1207 | if (fixP->fx_r_type == BFD_RELOC_16) | |
1208 | return 0; | |
1209 | } | |
1210 | ||
1211 | /* Do not adjust relocations involving symbols in merged sections. | |
1212 | ||
1213 | A reloc patching in the value of some symbol S plus some addend A | |
1214 | can be produced in different ways: | |
1215 | ||
1216 | 1) It might simply be a reference to the data at S + A. Clearly, | |
1217 | if linker merging shift that data around, the value patched in | |
1218 | by the reloc needs to be adjusted accordingly. | |
1219 | ||
1220 | 2) Or, it might be a reference to S, with A added in as a constant | |
1221 | bias. For example, given code like this: | |
1222 | ||
1223 | static int S[100]; | |
1224 | ||
1225 | ... S[i - 8] ... | |
1226 | ||
1227 | it would be reasonable for the compiler to rearrange the array | |
1228 | reference to something like: | |
1229 | ||
1230 | ... (S-8)[i] ... | |
1231 | ||
1232 | and emit assembly code that refers to S - (8 * sizeof (int)), | |
1233 | so the subtraction is done entirely at compile-time. In this | |
1234 | case, the reloc's addend A would be -(8 * sizeof (int)), and | |
1235 | shifting around code or data at S + A should not affect the | |
1236 | reloc: the reloc isn't referring to that code or data at all. | |
1237 | ||
1238 | The linker has no way of knowing which case it has in hand. So, | |
1239 | to disambiguate, we have the linker always treat reloc addends as | |
1240 | in case 2): they're constants that should be simply added to the | |
1241 | symbol value, just like the reloc says. And we express case 1) | |
1242 | in different way: we have the compiler place a label at the real | |
1243 | target, and reference that label with an addend of zero. (The | |
1244 | compiler is unlikely to reference code using a label plus an | |
1245 | offset anyway, since it doesn't know the sizes of the | |
1246 | instructions.) | |
1247 | ||
1248 | The simplification being done by gas/write.c:adjust_reloc_syms, | |
1249 | however, turns the explicit-label usage into the label-plus- | |
1250 | offset usage, re-introducing the ambiguity the compiler avoided. | |
1251 | So we need to disable that simplification for symbols referring | |
1252 | to merged data. | |
1253 | ||
1254 | This only affects object size a little bit. */ | |
1255 | if (S_GET_SEGMENT (fixP->fx_addsy)->flags & SEC_MERGE) | |
1256 | return 0; | |
1257 | ||
6772dd07 DD |
1258 | if (m32c_relax) |
1259 | return 0; | |
1260 | ||
49f58d10 JB |
1261 | return 1; |
1262 | } | |
1263 | ||
1264 | /* Worker function for m32c_is_colon_insn(). */ | |
1265 | static char restore_colon PARAMS ((int)); | |
1266 | ||
1267 | static char | |
1268 | restore_colon (int advance_i_l_p_by) | |
1269 | { | |
1270 | char c; | |
1271 | ||
1272 | /* Restore the colon, and advance input_line_pointer to | |
1273 | the end of the new symbol. */ | |
1274 | * input_line_pointer = ':'; | |
1275 | input_line_pointer += advance_i_l_p_by; | |
1276 | c = * input_line_pointer; | |
1277 | * input_line_pointer = 0; | |
1278 | ||
1279 | return c; | |
1280 | } | |
1281 | ||
1282 | /* Determines if the symbol starting at START and ending in | |
1283 | a colon that was at the location pointed to by INPUT_LINE_POINTER | |
1284 | (but which has now been replaced bu a NUL) is in fact an | |
1285 | :Z, :S, :Q, or :G suffix. | |
1286 | If it is, then it restores the colon, advances INPUT_LINE_POINTER | |
1287 | to the real end of the instruction/symbol, and returns the character | |
1288 | that really terminated the symbol. Otherwise it returns 0. */ | |
1289 | char | |
1290 | m32c_is_colon_insn (char *start ATTRIBUTE_UNUSED) | |
1291 | { | |
1292 | char * i_l_p = input_line_pointer; | |
1293 | ||
1294 | /* Check to see if the text following the colon is 'G' */ | |
1295 | if (TOLOWER (i_l_p[1]) == 'g' && (i_l_p[2] == ' ' || i_l_p[2] == '\t')) | |
1296 | return restore_colon (2); | |
1297 | ||
1298 | /* Check to see if the text following the colon is 'Q' */ | |
1299 | if (TOLOWER (i_l_p[1]) == 'q' && (i_l_p[2] == ' ' || i_l_p[2] == '\t')) | |
1300 | return restore_colon (2); | |
1301 | ||
1302 | /* Check to see if the text following the colon is 'S' */ | |
1303 | if (TOLOWER (i_l_p[1]) == 's' && (i_l_p[2] == ' ' || i_l_p[2] == '\t')) | |
1304 | return restore_colon (2); | |
1305 | ||
1306 | /* Check to see if the text following the colon is 'Z' */ | |
1307 | if (TOLOWER (i_l_p[1]) == 'z' && (i_l_p[2] == ' ' || i_l_p[2] == '\t')) | |
1308 | return restore_colon (2); | |
1309 | ||
1310 | return 0; | |
1311 | } |