]>
Commit | Line | Data |
---|---|---|
1 | /* tc-s390.c -- Assemble for the S390 | |
2 | Copyright (C) 2000-2022 Free Software Foundation, Inc. | |
3 | Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com). | |
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 3, 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 the Free | |
19 | Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA | |
20 | 02110-1301, USA. */ | |
21 | ||
22 | #include "as.h" | |
23 | #include "safe-ctype.h" | |
24 | #include "subsegs.h" | |
25 | #include "dwarf2dbg.h" | |
26 | #include "dw2gencfi.h" | |
27 | ||
28 | #include "opcode/s390.h" | |
29 | #include "elf/s390.h" | |
30 | ||
31 | /* The default architecture. */ | |
32 | #ifndef DEFAULT_ARCH | |
33 | #define DEFAULT_ARCH "s390" | |
34 | #endif | |
35 | static const char *default_arch = DEFAULT_ARCH; | |
36 | /* Either 32 or 64, selects file format. */ | |
37 | static int s390_arch_size = 0; | |
38 | ||
39 | /* If no -march option was given default to the highest available CPU. | |
40 | Since with S/390 a newer CPU always supports everything from its | |
41 | predecessors this will accept every valid asm input. */ | |
42 | static unsigned int current_cpu = S390_OPCODE_MAXCPU - 1; | |
43 | /* All facilities are enabled by default. */ | |
44 | static unsigned int current_flags = S390_INSTR_FLAG_FACILITY_MASK; | |
45 | /* The mode mask default is picked in init_default_arch depending on | |
46 | the current cpu. */ | |
47 | static unsigned int current_mode_mask = 0; | |
48 | ||
49 | /* Set to TRUE if the highgprs flag in the ELF header needs to be set | |
50 | for the output file. */ | |
51 | static bool set_highgprs_p = false; | |
52 | ||
53 | /* Whether to use user friendly register names. Default is TRUE. */ | |
54 | #ifndef TARGET_REG_NAMES_P | |
55 | #define TARGET_REG_NAMES_P true | |
56 | #endif | |
57 | ||
58 | static bool reg_names_p = TARGET_REG_NAMES_P; | |
59 | ||
60 | /* Set to TRUE if we want to warn about zero base/index registers. */ | |
61 | static bool warn_areg_zero = false; | |
62 | ||
63 | /* Generic assembler global variables which must be defined by all | |
64 | targets. */ | |
65 | ||
66 | const char comment_chars[] = "#"; | |
67 | ||
68 | /* Characters which start a comment at the beginning of a line. */ | |
69 | const char line_comment_chars[] = "#"; | |
70 | ||
71 | /* Characters which may be used to separate multiple commands on a | |
72 | single line. */ | |
73 | const char line_separator_chars[] = ";"; | |
74 | ||
75 | /* Characters which are used to indicate an exponent in a floating | |
76 | point number. */ | |
77 | const char EXP_CHARS[] = "eE"; | |
78 | ||
79 | /* Characters which mean that a number is a floating point constant, | |
80 | as in 0d1.0. */ | |
81 | const char FLT_CHARS[] = "dD"; | |
82 | ||
83 | /* The dwarf2 data alignment, adjusted for 32 or 64 bit. */ | |
84 | int s390_cie_data_alignment; | |
85 | ||
86 | /* The target specific pseudo-ops which we support. */ | |
87 | ||
88 | /* Define the prototypes for the pseudo-ops */ | |
89 | static void s390_byte (int); | |
90 | static void s390_elf_cons (int); | |
91 | static void s390_bss (int); | |
92 | static void s390_insn (int); | |
93 | static void s390_literals (int); | |
94 | static void s390_machine (int); | |
95 | static void s390_machinemode (int); | |
96 | ||
97 | const pseudo_typeS md_pseudo_table[] = | |
98 | { | |
99 | { "align", s_align_bytes, 0 }, | |
100 | /* Pseudo-ops which must be defined. */ | |
101 | { "bss", s390_bss, 0 }, | |
102 | { "insn", s390_insn, 0 }, | |
103 | /* Pseudo-ops which must be overridden. */ | |
104 | { "byte", s390_byte, 0 }, | |
105 | { "short", s390_elf_cons, 2 }, | |
106 | { "long", s390_elf_cons, 4 }, | |
107 | { "quad", s390_elf_cons, 8 }, | |
108 | { "ltorg", s390_literals, 0 }, | |
109 | { "string", stringer, 8 + 1 }, | |
110 | { "machine", s390_machine, 0 }, | |
111 | { "machinemode", s390_machinemode, 0 }, | |
112 | { NULL, NULL, 0 } | |
113 | }; | |
114 | ||
115 | /* Given NAME, find the register number associated with that name, return | |
116 | the integer value associated with the given name or -1 on failure. */ | |
117 | ||
118 | static int | |
119 | reg_name_search (const char *name) | |
120 | { | |
121 | int val = -1; | |
122 | ||
123 | if (strcasecmp (name, "lit") == 0) | |
124 | return 13; | |
125 | ||
126 | if (strcasecmp (name, "sp") == 0) | |
127 | return 15; | |
128 | ||
129 | if (name[0] != 'a' && name[0] != 'c' && name[0] != 'f' | |
130 | && name[0] != 'r' && name[0] != 'v') | |
131 | return -1; | |
132 | ||
133 | if (ISDIGIT (name[1])) | |
134 | { | |
135 | val = name[1] - '0'; | |
136 | if (ISDIGIT (name[2])) | |
137 | val = val * 10 + name[2] - '0'; | |
138 | } | |
139 | ||
140 | if ((name[0] != 'v' && val > 15) || val > 31) | |
141 | val = -1; | |
142 | ||
143 | return val; | |
144 | } | |
145 | ||
146 | ||
147 | /* | |
148 | * Summary of register_name(). | |
149 | * | |
150 | * in: Input_line_pointer points to 1st char of operand. | |
151 | * | |
152 | * out: A expressionS. | |
153 | * The operand may have been a register: in this case, X_op == O_register, | |
154 | * X_add_number is set to the register number, and truth is returned. | |
155 | * Input_line_pointer->(next non-blank) char after operand, or is in its | |
156 | * original state. | |
157 | */ | |
158 | ||
159 | static bool | |
160 | register_name (expressionS *expressionP) | |
161 | { | |
162 | int reg_number; | |
163 | char *name; | |
164 | char *start; | |
165 | char c; | |
166 | ||
167 | /* Find the spelling of the operand. */ | |
168 | start = name = input_line_pointer; | |
169 | if (name[0] == '%' && ISALPHA (name[1])) | |
170 | name = ++input_line_pointer; | |
171 | else | |
172 | return false; | |
173 | ||
174 | c = get_symbol_name (&name); | |
175 | reg_number = reg_name_search (name); | |
176 | ||
177 | /* Put back the delimiting char. */ | |
178 | (void) restore_line_pointer (c); | |
179 | ||
180 | /* Look to see if it's in the register table. */ | |
181 | if (reg_number >= 0) | |
182 | { | |
183 | expressionP->X_op = O_register; | |
184 | expressionP->X_add_number = reg_number; | |
185 | ||
186 | /* Make the rest nice. */ | |
187 | expressionP->X_add_symbol = NULL; | |
188 | expressionP->X_op_symbol = NULL; | |
189 | return true; | |
190 | } | |
191 | ||
192 | /* Reset the line as if we had not done anything. */ | |
193 | input_line_pointer = start; | |
194 | return false; | |
195 | } | |
196 | ||
197 | /* Local variables. */ | |
198 | ||
199 | /* Opformat hash table. */ | |
200 | static htab_t s390_opformat_hash; | |
201 | ||
202 | /* Opcode hash table. */ | |
203 | static htab_t s390_opcode_hash = NULL; | |
204 | ||
205 | /* Flags to set in the elf header */ | |
206 | static flagword s390_flags = 0; | |
207 | ||
208 | symbolS *GOT_symbol; /* Pre-defined "_GLOBAL_OFFSET_TABLE_" */ | |
209 | ||
210 | #ifndef WORKING_DOT_WORD | |
211 | int md_short_jump_size = 4; | |
212 | int md_long_jump_size = 4; | |
213 | #endif | |
214 | ||
215 | const char *md_shortopts = "A:m:kVQ:"; | |
216 | struct option md_longopts[] = { | |
217 | {NULL, no_argument, NULL, 0} | |
218 | }; | |
219 | size_t md_longopts_size = sizeof (md_longopts); | |
220 | ||
221 | /* Initialize the default opcode arch and word size from the default | |
222 | architecture name if not specified by an option. */ | |
223 | static void | |
224 | init_default_arch (void) | |
225 | { | |
226 | if (strcmp (default_arch, "s390") == 0) | |
227 | { | |
228 | if (s390_arch_size == 0) | |
229 | s390_arch_size = 32; | |
230 | } | |
231 | else if (strcmp (default_arch, "s390x") == 0) | |
232 | { | |
233 | if (s390_arch_size == 0) | |
234 | s390_arch_size = 64; | |
235 | } | |
236 | else | |
237 | as_fatal (_("Invalid default architecture, broken assembler.")); | |
238 | ||
239 | if (current_mode_mask == 0) | |
240 | { | |
241 | /* Default to z/Architecture mode if the CPU supports it. */ | |
242 | if (current_cpu < S390_OPCODE_Z900) | |
243 | current_mode_mask = 1 << S390_OPCODE_ESA; | |
244 | else | |
245 | current_mode_mask = 1 << S390_OPCODE_ZARCH; | |
246 | } | |
247 | } | |
248 | ||
249 | /* Called by TARGET_FORMAT. */ | |
250 | const char * | |
251 | s390_target_format (void) | |
252 | { | |
253 | /* We don't get a chance to initialize anything before we're called, | |
254 | so handle that now. */ | |
255 | init_default_arch (); | |
256 | ||
257 | return s390_arch_size == 64 ? "elf64-s390" : "elf32-s390"; | |
258 | } | |
259 | ||
260 | /* Map a cpu string ARG as given with -march= or .machine to the respective | |
261 | enum s390_opcode_cpu_val value. If ALLOW_EXTENSIONS is TRUE, the cpu name | |
262 | can be followed by a list of cpu facility flags each beginning with the | |
263 | character '+'. The active cpu flags are returned through *RET_FLAGS. | |
264 | In case of an error, S390_OPCODE_MAXCPU is returned. */ | |
265 | ||
266 | static unsigned int | |
267 | s390_parse_cpu (const char *arg, | |
268 | unsigned int *ret_flags, | |
269 | bool allow_extensions) | |
270 | { | |
271 | static struct | |
272 | { | |
273 | const char * name; | |
274 | unsigned int name_len; | |
275 | const char * alt_name; | |
276 | unsigned int alt_name_len; | |
277 | unsigned int flags; | |
278 | } cpu_table[S390_OPCODE_MAXCPU] = | |
279 | { | |
280 | { STRING_COMMA_LEN ("g5"), STRING_COMMA_LEN ("arch3"), 0 }, | |
281 | { STRING_COMMA_LEN ("g6"), STRING_COMMA_LEN (""), 0 }, | |
282 | { STRING_COMMA_LEN ("z900"), STRING_COMMA_LEN ("arch5"), 0 }, | |
283 | { STRING_COMMA_LEN ("z990"), STRING_COMMA_LEN ("arch6"), 0 }, | |
284 | { STRING_COMMA_LEN ("z9-109"), STRING_COMMA_LEN (""), 0 }, | |
285 | { STRING_COMMA_LEN ("z9-ec"), STRING_COMMA_LEN ("arch7"), 0 }, | |
286 | { STRING_COMMA_LEN ("z10"), STRING_COMMA_LEN ("arch8"), 0 }, | |
287 | { STRING_COMMA_LEN ("z196"), STRING_COMMA_LEN ("arch9"), 0 }, | |
288 | { STRING_COMMA_LEN ("zEC12"), STRING_COMMA_LEN ("arch10"), | |
289 | S390_INSTR_FLAG_HTM }, | |
290 | { STRING_COMMA_LEN ("z13"), STRING_COMMA_LEN ("arch11"), | |
291 | S390_INSTR_FLAG_HTM | S390_INSTR_FLAG_VX }, | |
292 | { STRING_COMMA_LEN ("z14"), STRING_COMMA_LEN ("arch12"), | |
293 | S390_INSTR_FLAG_HTM | S390_INSTR_FLAG_VX }, | |
294 | { STRING_COMMA_LEN ("z15"), STRING_COMMA_LEN ("arch13"), | |
295 | S390_INSTR_FLAG_HTM | S390_INSTR_FLAG_VX }, | |
296 | { STRING_COMMA_LEN (""), STRING_COMMA_LEN ("arch14"), | |
297 | S390_INSTR_FLAG_HTM | S390_INSTR_FLAG_VX } | |
298 | }; | |
299 | static struct | |
300 | { | |
301 | const char *name; | |
302 | unsigned int mask; | |
303 | bool on; | |
304 | } cpu_flags[] = | |
305 | { | |
306 | { "htm", S390_INSTR_FLAG_HTM, true }, | |
307 | { "nohtm", S390_INSTR_FLAG_HTM, false }, | |
308 | { "vx", S390_INSTR_FLAG_VX, true }, | |
309 | { "novx", S390_INSTR_FLAG_VX, false } | |
310 | }; | |
311 | unsigned int icpu; | |
312 | char *ilp_bak; | |
313 | ||
314 | icpu = S390_OPCODE_MAXCPU; | |
315 | if (startswith (arg, "all") && (arg[3] == 0 || arg[3] == '+')) | |
316 | { | |
317 | icpu = S390_OPCODE_MAXCPU - 1; | |
318 | arg += 3; | |
319 | } | |
320 | else | |
321 | { | |
322 | for (icpu = 0; icpu < S390_OPCODE_MAXCPU; icpu++) | |
323 | { | |
324 | unsigned int l, l_alt; | |
325 | ||
326 | l = cpu_table[icpu].name_len; | |
327 | ||
328 | if (strncmp (arg, cpu_table[icpu].name, l) == 0 | |
329 | && (arg[l] == 0 || arg[l] == '+')) | |
330 | { | |
331 | arg += l; | |
332 | break; | |
333 | } | |
334 | ||
335 | l_alt = cpu_table[icpu].alt_name_len; | |
336 | ||
337 | if (l_alt > 0 | |
338 | && strncmp (arg, cpu_table[icpu].alt_name, l_alt) == 0 | |
339 | && (arg[l_alt] == 0 || arg[l_alt] == '+')) | |
340 | { | |
341 | arg += l_alt; | |
342 | break; | |
343 | } | |
344 | } | |
345 | } | |
346 | ||
347 | if (icpu == S390_OPCODE_MAXCPU) | |
348 | return S390_OPCODE_MAXCPU; | |
349 | ||
350 | ilp_bak = input_line_pointer; | |
351 | if (icpu != S390_OPCODE_MAXCPU) | |
352 | { | |
353 | input_line_pointer = (char *) arg; | |
354 | *ret_flags = (cpu_table[icpu].flags & S390_INSTR_FLAG_FACILITY_MASK); | |
355 | ||
356 | while (*input_line_pointer == '+' && allow_extensions) | |
357 | { | |
358 | unsigned int iflag; | |
359 | char *sym; | |
360 | char c; | |
361 | ||
362 | input_line_pointer++; | |
363 | c = get_symbol_name (&sym); | |
364 | for (iflag = 0; iflag < ARRAY_SIZE (cpu_flags); iflag++) | |
365 | { | |
366 | if (strcmp (sym, cpu_flags[iflag].name) == 0) | |
367 | { | |
368 | if (cpu_flags[iflag].on) | |
369 | *ret_flags |= cpu_flags[iflag].mask; | |
370 | else | |
371 | *ret_flags &= ~cpu_flags[iflag].mask; | |
372 | break; | |
373 | } | |
374 | } | |
375 | if (iflag == ARRAY_SIZE (cpu_flags)) | |
376 | as_bad (_("no such machine extension `%s'"), sym - 1); | |
377 | *input_line_pointer = c; | |
378 | if (iflag == ARRAY_SIZE (cpu_flags)) | |
379 | break; | |
380 | } | |
381 | } | |
382 | ||
383 | SKIP_WHITESPACE (); | |
384 | ||
385 | if (*input_line_pointer != 0 && *input_line_pointer != '\n') | |
386 | { | |
387 | as_bad (_("junk at end of machine string, first unrecognized character" | |
388 | " is `%c'"), *input_line_pointer); | |
389 | icpu = S390_OPCODE_MAXCPU; | |
390 | } | |
391 | input_line_pointer = ilp_bak; | |
392 | ||
393 | return icpu; | |
394 | } | |
395 | ||
396 | int | |
397 | md_parse_option (int c, const char *arg) | |
398 | { | |
399 | switch (c) | |
400 | { | |
401 | /* -k: Ignore for FreeBSD compatibility. */ | |
402 | case 'k': | |
403 | break; | |
404 | case 'm': | |
405 | if (arg != NULL && strcmp (arg, "regnames") == 0) | |
406 | reg_names_p = true; | |
407 | ||
408 | else if (arg != NULL && strcmp (arg, "no-regnames") == 0) | |
409 | reg_names_p = false; | |
410 | ||
411 | else if (arg != NULL && strcmp (arg, "warn-areg-zero") == 0) | |
412 | warn_areg_zero = true; | |
413 | ||
414 | else if (arg != NULL && strcmp (arg, "31") == 0) | |
415 | s390_arch_size = 32; | |
416 | ||
417 | else if (arg != NULL && strcmp (arg, "64") == 0) | |
418 | s390_arch_size = 64; | |
419 | ||
420 | else if (arg != NULL && strcmp (arg, "esa") == 0) | |
421 | current_mode_mask = 1 << S390_OPCODE_ESA; | |
422 | ||
423 | else if (arg != NULL && strcmp (arg, "zarch") == 0) | |
424 | { | |
425 | if (s390_arch_size == 32) | |
426 | set_highgprs_p = true; | |
427 | current_mode_mask = 1 << S390_OPCODE_ZARCH; | |
428 | } | |
429 | ||
430 | else if (arg != NULL && startswith (arg, "arch=")) | |
431 | { | |
432 | current_cpu = s390_parse_cpu (arg + 5, ¤t_flags, false); | |
433 | if (current_cpu == S390_OPCODE_MAXCPU) | |
434 | { | |
435 | as_bad (_("invalid switch -m%s"), arg); | |
436 | return 0; | |
437 | } | |
438 | } | |
439 | ||
440 | else | |
441 | { | |
442 | as_bad (_("invalid switch -m%s"), arg); | |
443 | return 0; | |
444 | } | |
445 | break; | |
446 | ||
447 | case 'A': | |
448 | /* Option -A is deprecated. Still available for compatibility. */ | |
449 | if (arg != NULL && strcmp (arg, "esa") == 0) | |
450 | current_cpu = S390_OPCODE_G5; | |
451 | else if (arg != NULL && strcmp (arg, "esame") == 0) | |
452 | current_cpu = S390_OPCODE_Z900; | |
453 | else | |
454 | as_bad (_("invalid architecture -A%s"), arg); | |
455 | break; | |
456 | ||
457 | /* -V: SVR4 argument to print version ID. */ | |
458 | case 'V': | |
459 | print_version_id (); | |
460 | break; | |
461 | ||
462 | /* -Qy, -Qn: SVR4 arguments controlling whether a .comment section | |
463 | should be emitted or not. FIXME: Not implemented. */ | |
464 | case 'Q': | |
465 | break; | |
466 | ||
467 | default: | |
468 | return 0; | |
469 | } | |
470 | ||
471 | return 1; | |
472 | } | |
473 | ||
474 | void | |
475 | md_show_usage (FILE *stream) | |
476 | { | |
477 | fprintf (stream, _("\ | |
478 | S390 options:\n\ | |
479 | -mregnames Allow symbolic names for registers\n\ | |
480 | -mwarn-areg-zero Warn about zero base/index registers\n\ | |
481 | -mno-regnames Do not allow symbolic names for registers\n\ | |
482 | -m31 Set file format to 31 bit format\n\ | |
483 | -m64 Set file format to 64 bit format\n")); | |
484 | fprintf (stream, _("\ | |
485 | -V print assembler version number\n\ | |
486 | -Qy, -Qn ignored\n")); | |
487 | } | |
488 | ||
489 | /* Generate the hash table mapping mnemonics to struct s390_opcode. | |
490 | This table is built at startup and whenever the CPU level is | |
491 | changed using .machine. */ | |
492 | ||
493 | static void | |
494 | s390_setup_opcodes (void) | |
495 | { | |
496 | const struct s390_opcode *op; | |
497 | const struct s390_opcode *op_end; | |
498 | bool dup_insn = false; | |
499 | ||
500 | if (s390_opcode_hash != NULL) | |
501 | htab_delete (s390_opcode_hash); | |
502 | ||
503 | /* Insert the opcodes into a hash table. */ | |
504 | s390_opcode_hash = str_htab_create (); | |
505 | ||
506 | op_end = s390_opcodes + s390_num_opcodes; | |
507 | for (op = s390_opcodes; op < op_end; op++) | |
508 | { | |
509 | int use_opcode; | |
510 | ||
511 | while (op < op_end - 1 && strcmp(op->name, op[1].name) == 0) | |
512 | { | |
513 | if (op->min_cpu <= current_cpu && (op->modes & current_mode_mask)) | |
514 | break; | |
515 | op++; | |
516 | } | |
517 | ||
518 | if ((op->modes & current_mode_mask) == 0) | |
519 | use_opcode = 0; | |
520 | else if ((op->flags & S390_INSTR_FLAG_FACILITY_MASK) == 0) | |
521 | { | |
522 | /* Opcodes that do not belong to a specific facility are enabled if | |
523 | present in the selected cpu. */ | |
524 | use_opcode = (op->min_cpu <= current_cpu); | |
525 | } | |
526 | else | |
527 | { | |
528 | unsigned int f; | |
529 | ||
530 | /* Opcodes of a specific facility are enabled if the facility is | |
531 | enabled. Note: only some facilities are represented as flags. */ | |
532 | f = (op->flags & S390_INSTR_FLAG_FACILITY_MASK); | |
533 | use_opcode = ((f & current_flags) == f); | |
534 | } | |
535 | if (use_opcode | |
536 | && str_hash_insert (s390_opcode_hash, op->name, op, 0) != NULL) | |
537 | { | |
538 | as_bad (_("duplicate %s"), op->name); | |
539 | dup_insn = true; | |
540 | } | |
541 | ||
542 | while (op < op_end - 1 && strcmp (op->name, op[1].name) == 0) | |
543 | op++; | |
544 | } | |
545 | ||
546 | if (dup_insn) | |
547 | abort (); | |
548 | } | |
549 | ||
550 | /* This function is called when the assembler starts up. It is called | |
551 | after the options have been parsed and the output file has been | |
552 | opened. */ | |
553 | ||
554 | void | |
555 | md_begin (void) | |
556 | { | |
557 | const struct s390_opcode *op; | |
558 | const struct s390_opcode *op_end; | |
559 | ||
560 | /* Give a warning if the combination -m64-bit and -Aesa is used. */ | |
561 | if (s390_arch_size == 64 && current_cpu < S390_OPCODE_Z900) | |
562 | as_warn (_("The 64 bit file format is used without esame instructions.")); | |
563 | ||
564 | s390_cie_data_alignment = -s390_arch_size / 8; | |
565 | ||
566 | /* Set the ELF flags if desired. */ | |
567 | if (s390_flags) | |
568 | bfd_set_private_flags (stdoutput, s390_flags); | |
569 | ||
570 | /* Insert the opcode formats into a hash table. */ | |
571 | s390_opformat_hash = str_htab_create (); | |
572 | ||
573 | op_end = s390_opformats + s390_num_opformats; | |
574 | for (op = s390_opformats; op < op_end; op++) | |
575 | if (str_hash_insert (s390_opformat_hash, op->name, op, 0) != NULL) | |
576 | as_fatal (_("duplicate %s"), op->name); | |
577 | ||
578 | s390_setup_opcodes (); | |
579 | ||
580 | record_alignment (text_section, 2); | |
581 | record_alignment (data_section, 2); | |
582 | record_alignment (bss_section, 2); | |
583 | } | |
584 | ||
585 | /* Called after all assembly has been done. */ | |
586 | void | |
587 | s390_md_end (void) | |
588 | { | |
589 | if (s390_arch_size == 64) | |
590 | bfd_set_arch_mach (stdoutput, bfd_arch_s390, bfd_mach_s390_64); | |
591 | else | |
592 | bfd_set_arch_mach (stdoutput, bfd_arch_s390, bfd_mach_s390_31); | |
593 | } | |
594 | ||
595 | /* Insert an operand value into an instruction. */ | |
596 | ||
597 | static void | |
598 | s390_insert_operand (unsigned char *insn, | |
599 | const struct s390_operand *operand, | |
600 | offsetT val, | |
601 | const char *file, | |
602 | unsigned int line) | |
603 | { | |
604 | addressT uval; | |
605 | int offset; | |
606 | ||
607 | if (operand->flags & (S390_OPERAND_SIGNED|S390_OPERAND_PCREL)) | |
608 | { | |
609 | offsetT min, max; | |
610 | ||
611 | max = ((offsetT) 1 << (operand->bits - 1)) - 1; | |
612 | min = - ((offsetT) 1 << (operand->bits - 1)); | |
613 | /* Halve PCREL operands. */ | |
614 | if (operand->flags & S390_OPERAND_PCREL) | |
615 | val >>= 1; | |
616 | /* Check for underflow / overflow. */ | |
617 | if (val < min || val > max) | |
618 | { | |
619 | const char *err = | |
620 | _("operand out of range (%s not between %ld and %ld)"); | |
621 | char buf[100]; | |
622 | ||
623 | if (operand->flags & S390_OPERAND_PCREL) | |
624 | { | |
625 | val <<= 1; | |
626 | min <<= 1; | |
627 | max <<= 1; | |
628 | } | |
629 | bfd_sprintf_vma (stdoutput, buf, val); | |
630 | if (file == (char *) NULL) | |
631 | as_bad (err, buf, (int) min, (int) max); | |
632 | else | |
633 | as_bad_where (file, line, err, buf, (int) min, (int) max); | |
634 | return; | |
635 | } | |
636 | /* val is ok, now restrict it to operand->bits bits. */ | |
637 | uval = (addressT) val & ((((addressT) 1 << (operand->bits-1)) << 1) - 1); | |
638 | /* val is restrict, now check for special case. */ | |
639 | if (operand->bits == 20 && operand->shift == 20) | |
640 | uval = (uval >> 12) | ((uval & 0xfff) << 8); | |
641 | } | |
642 | else | |
643 | { | |
644 | addressT min, max; | |
645 | ||
646 | max = (((addressT) 1 << (operand->bits - 1)) << 1) - 1; | |
647 | min = (offsetT) 0; | |
648 | uval = (addressT) val; | |
649 | ||
650 | /* Vector register operands have an additional bit in the RXB | |
651 | field. */ | |
652 | if (operand->flags & S390_OPERAND_VR) | |
653 | max = (max << 1) | 1; | |
654 | ||
655 | /* Length x in an instructions has real length x+1. */ | |
656 | if (operand->flags & S390_OPERAND_LENGTH) | |
657 | uval--; | |
658 | /* Check for underflow / overflow. */ | |
659 | if (uval < min || uval > max) | |
660 | { | |
661 | if (operand->flags & S390_OPERAND_LENGTH) | |
662 | { | |
663 | uval++; | |
664 | min++; | |
665 | max++; | |
666 | } | |
667 | ||
668 | as_bad_value_out_of_range (_("operand"), uval, (offsetT) min, (offsetT) max, file, line); | |
669 | ||
670 | return; | |
671 | } | |
672 | } | |
673 | ||
674 | if (operand->flags & S390_OPERAND_VR) | |
675 | { | |
676 | /* Insert the extra bit into the RXB field. */ | |
677 | switch (operand->shift) | |
678 | { | |
679 | case 8: | |
680 | insn[4] |= (uval & 0x10) >> 1; | |
681 | break; | |
682 | case 12: | |
683 | insn[4] |= (uval & 0x10) >> 2; | |
684 | break; | |
685 | case 16: | |
686 | insn[4] |= (uval & 0x10) >> 3; | |
687 | break; | |
688 | case 32: | |
689 | insn[4] |= (uval & 0x10) >> 4; | |
690 | break; | |
691 | } | |
692 | uval &= 0xf; | |
693 | } | |
694 | ||
695 | if (operand->flags & S390_OPERAND_OR1) | |
696 | uval |= 1; | |
697 | if (operand->flags & S390_OPERAND_OR2) | |
698 | uval |= 2; | |
699 | if (operand->flags & S390_OPERAND_OR8) | |
700 | uval |= 8; | |
701 | ||
702 | /* Duplicate the operand at bit pos 12 to 16. */ | |
703 | if (operand->flags & S390_OPERAND_CP16) | |
704 | { | |
705 | /* Copy VR operand at bit pos 12 to bit pos 16. */ | |
706 | insn[2] |= uval << 4; | |
707 | /* Copy the flag in the RXB field. */ | |
708 | insn[4] |= (insn[4] & 4) >> 1; | |
709 | } | |
710 | ||
711 | /* Insert fragments of the operand byte for byte. */ | |
712 | offset = operand->shift + operand->bits; | |
713 | uval <<= (-offset) & 7; | |
714 | insn += (offset - 1) / 8; | |
715 | while (uval != 0) | |
716 | { | |
717 | *insn-- |= uval; | |
718 | uval >>= 8; | |
719 | } | |
720 | } | |
721 | ||
722 | struct map_tls | |
723 | { | |
724 | const char *string; | |
725 | int length; | |
726 | bfd_reloc_code_real_type reloc; | |
727 | }; | |
728 | ||
729 | /* Parse tls marker and return the desired relocation. */ | |
730 | static bfd_reloc_code_real_type | |
731 | s390_tls_suffix (char **str_p, expressionS *exp_p) | |
732 | { | |
733 | static struct map_tls mapping[] = | |
734 | { | |
735 | { "tls_load", 8, BFD_RELOC_390_TLS_LOAD }, | |
736 | { "tls_gdcall", 10, BFD_RELOC_390_TLS_GDCALL }, | |
737 | { "tls_ldcall", 10, BFD_RELOC_390_TLS_LDCALL }, | |
738 | { NULL, 0, BFD_RELOC_UNUSED } | |
739 | }; | |
740 | struct map_tls *ptr; | |
741 | char *orig_line; | |
742 | char *str; | |
743 | char *ident; | |
744 | int len; | |
745 | ||
746 | str = *str_p; | |
747 | if (*str++ != ':') | |
748 | return BFD_RELOC_UNUSED; | |
749 | ||
750 | ident = str; | |
751 | while (ISIDNUM (*str)) | |
752 | str++; | |
753 | len = str - ident; | |
754 | if (*str++ != ':') | |
755 | return BFD_RELOC_UNUSED; | |
756 | ||
757 | orig_line = input_line_pointer; | |
758 | input_line_pointer = str; | |
759 | expression (exp_p); | |
760 | str = input_line_pointer; | |
761 | if (&input_line_pointer != str_p) | |
762 | input_line_pointer = orig_line; | |
763 | ||
764 | if (exp_p->X_op != O_symbol) | |
765 | return BFD_RELOC_UNUSED; | |
766 | ||
767 | for (ptr = &mapping[0]; ptr->length > 0; ptr++) | |
768 | if (len == ptr->length | |
769 | && strncasecmp (ident, ptr->string, ptr->length) == 0) | |
770 | { | |
771 | /* Found a matching tls suffix. */ | |
772 | *str_p = str; | |
773 | return ptr->reloc; | |
774 | } | |
775 | return BFD_RELOC_UNUSED; | |
776 | } | |
777 | ||
778 | /* Structure used to hold suffixes. */ | |
779 | typedef enum | |
780 | { | |
781 | ELF_SUFFIX_NONE = 0, | |
782 | ELF_SUFFIX_GOT, | |
783 | ELF_SUFFIX_PLT, | |
784 | ELF_SUFFIX_GOTENT, | |
785 | ELF_SUFFIX_GOTOFF, | |
786 | ELF_SUFFIX_GOTPLT, | |
787 | ELF_SUFFIX_PLTOFF, | |
788 | ELF_SUFFIX_TLS_GD, | |
789 | ELF_SUFFIX_TLS_GOTIE, | |
790 | ELF_SUFFIX_TLS_IE, | |
791 | ELF_SUFFIX_TLS_LDM, | |
792 | ELF_SUFFIX_TLS_LDO, | |
793 | ELF_SUFFIX_TLS_LE | |
794 | } | |
795 | elf_suffix_type; | |
796 | ||
797 | struct map_bfd | |
798 | { | |
799 | const char *string; | |
800 | int length; | |
801 | elf_suffix_type suffix; | |
802 | }; | |
803 | ||
804 | ||
805 | /* Parse @got/@plt/@gotoff. and return the desired relocation. */ | |
806 | static elf_suffix_type | |
807 | s390_elf_suffix (char **str_p, expressionS *exp_p) | |
808 | { | |
809 | static struct map_bfd mapping[] = | |
810 | { | |
811 | { "got", 3, ELF_SUFFIX_GOT }, | |
812 | { "got12", 5, ELF_SUFFIX_GOT }, | |
813 | { "plt", 3, ELF_SUFFIX_PLT }, | |
814 | { "gotent", 6, ELF_SUFFIX_GOTENT }, | |
815 | { "gotoff", 6, ELF_SUFFIX_GOTOFF }, | |
816 | { "gotplt", 6, ELF_SUFFIX_GOTPLT }, | |
817 | { "pltoff", 6, ELF_SUFFIX_PLTOFF }, | |
818 | { "tlsgd", 5, ELF_SUFFIX_TLS_GD }, | |
819 | { "gotntpoff", 9, ELF_SUFFIX_TLS_GOTIE }, | |
820 | { "indntpoff", 9, ELF_SUFFIX_TLS_IE }, | |
821 | { "tlsldm", 6, ELF_SUFFIX_TLS_LDM }, | |
822 | { "dtpoff", 6, ELF_SUFFIX_TLS_LDO }, | |
823 | { "ntpoff", 6, ELF_SUFFIX_TLS_LE }, | |
824 | { NULL, 0, ELF_SUFFIX_NONE } | |
825 | }; | |
826 | ||
827 | struct map_bfd *ptr; | |
828 | char *str = *str_p; | |
829 | char *ident; | |
830 | int len; | |
831 | ||
832 | if (*str++ != '@') | |
833 | return ELF_SUFFIX_NONE; | |
834 | ||
835 | ident = str; | |
836 | while (ISALNUM (*str)) | |
837 | str++; | |
838 | len = str - ident; | |
839 | ||
840 | for (ptr = &mapping[0]; ptr->length > 0; ptr++) | |
841 | if (len == ptr->length | |
842 | && strncasecmp (ident, ptr->string, ptr->length) == 0) | |
843 | { | |
844 | if (exp_p->X_add_number != 0) | |
845 | as_warn (_("identifier+constant@%s means identifier@%s+constant"), | |
846 | ptr->string, ptr->string); | |
847 | /* Now check for identifier@suffix+constant. */ | |
848 | if (*str == '-' || *str == '+') | |
849 | { | |
850 | char *orig_line = input_line_pointer; | |
851 | expressionS new_exp; | |
852 | ||
853 | input_line_pointer = str; | |
854 | expression (&new_exp); | |
855 | ||
856 | switch (new_exp.X_op) | |
857 | { | |
858 | case O_constant: /* X_add_number (a constant expression). */ | |
859 | exp_p->X_add_number += new_exp.X_add_number; | |
860 | str = input_line_pointer; | |
861 | break; | |
862 | case O_symbol: /* X_add_symbol + X_add_number. */ | |
863 | /* this case is used for e.g. xyz@PLT+.Label. */ | |
864 | exp_p->X_add_number += new_exp.X_add_number; | |
865 | exp_p->X_op_symbol = new_exp.X_add_symbol; | |
866 | exp_p->X_op = O_add; | |
867 | str = input_line_pointer; | |
868 | break; | |
869 | case O_uminus: /* (- X_add_symbol) + X_add_number. */ | |
870 | /* this case is used for e.g. xyz@PLT-.Label. */ | |
871 | exp_p->X_add_number += new_exp.X_add_number; | |
872 | exp_p->X_op_symbol = new_exp.X_add_symbol; | |
873 | exp_p->X_op = O_subtract; | |
874 | str = input_line_pointer; | |
875 | break; | |
876 | default: | |
877 | break; | |
878 | } | |
879 | ||
880 | /* If s390_elf_suffix has not been called with | |
881 | &input_line_pointer as first parameter, we have | |
882 | clobbered the input_line_pointer. We have to | |
883 | undo that. */ | |
884 | if (&input_line_pointer != str_p) | |
885 | input_line_pointer = orig_line; | |
886 | } | |
887 | *str_p = str; | |
888 | return ptr->suffix; | |
889 | } | |
890 | ||
891 | return ELF_SUFFIX_NONE; | |
892 | } | |
893 | ||
894 | /* Structure used to hold a literal pool entry. */ | |
895 | struct s390_lpe | |
896 | { | |
897 | struct s390_lpe *next; | |
898 | expressionS ex; | |
899 | FLONUM_TYPE floatnum; /* used if X_op == O_big && X_add_number <= 0 */ | |
900 | LITTLENUM_TYPE bignum[4]; /* used if X_op == O_big && X_add_number > 0 */ | |
901 | int nbytes; | |
902 | bfd_reloc_code_real_type reloc; | |
903 | symbolS *sym; | |
904 | }; | |
905 | ||
906 | static struct s390_lpe *lpe_free_list = NULL; | |
907 | static struct s390_lpe *lpe_list = NULL; | |
908 | static struct s390_lpe *lpe_list_tail = NULL; | |
909 | static symbolS *lp_sym = NULL; | |
910 | static int lp_count = 0; | |
911 | static int lpe_count = 0; | |
912 | ||
913 | static int | |
914 | s390_exp_compare (expressionS *exp1, expressionS *exp2) | |
915 | { | |
916 | if (exp1->X_op != exp2->X_op) | |
917 | return 0; | |
918 | ||
919 | switch (exp1->X_op) | |
920 | { | |
921 | case O_constant: /* X_add_number must be equal. */ | |
922 | case O_register: | |
923 | return exp1->X_add_number == exp2->X_add_number; | |
924 | ||
925 | case O_big: | |
926 | as_bad (_("Can't handle O_big in s390_exp_compare")); | |
927 | return 0; | |
928 | ||
929 | case O_symbol: /* X_add_symbol & X_add_number must be equal. */ | |
930 | case O_symbol_rva: | |
931 | case O_uminus: | |
932 | case O_bit_not: | |
933 | case O_logical_not: | |
934 | return (exp1->X_add_symbol == exp2->X_add_symbol) | |
935 | && (exp1->X_add_number == exp2->X_add_number); | |
936 | ||
937 | case O_multiply: /* X_add_symbol,X_op_symbol&X_add_number must be equal. */ | |
938 | case O_divide: | |
939 | case O_modulus: | |
940 | case O_left_shift: | |
941 | case O_right_shift: | |
942 | case O_bit_inclusive_or: | |
943 | case O_bit_or_not: | |
944 | case O_bit_exclusive_or: | |
945 | case O_bit_and: | |
946 | case O_add: | |
947 | case O_subtract: | |
948 | case O_eq: | |
949 | case O_ne: | |
950 | case O_lt: | |
951 | case O_le: | |
952 | case O_ge: | |
953 | case O_gt: | |
954 | case O_logical_and: | |
955 | case O_logical_or: | |
956 | return (exp1->X_add_symbol == exp2->X_add_symbol) | |
957 | && (exp1->X_op_symbol == exp2->X_op_symbol) | |
958 | && (exp1->X_add_number == exp2->X_add_number); | |
959 | default: | |
960 | return 0; | |
961 | } | |
962 | } | |
963 | ||
964 | /* Test for @lit and if it's present make an entry in the literal pool and | |
965 | modify the current expression to be an offset into the literal pool. */ | |
966 | static elf_suffix_type | |
967 | s390_lit_suffix (char **str_p, expressionS *exp_p, elf_suffix_type suffix) | |
968 | { | |
969 | bfd_reloc_code_real_type reloc; | |
970 | char tmp_name[64]; | |
971 | char *str = *str_p; | |
972 | char *ident; | |
973 | struct s390_lpe *lpe; | |
974 | int nbytes, len; | |
975 | ||
976 | if (*str++ != ':') | |
977 | return suffix; /* No modification. */ | |
978 | ||
979 | /* We look for a suffix of the form "@lit1", "@lit2", "@lit4" or "@lit8". */ | |
980 | ident = str; | |
981 | while (ISALNUM (*str)) | |
982 | str++; | |
983 | len = str - ident; | |
984 | if (len != 4 || strncasecmp (ident, "lit", 3) != 0 | |
985 | || (ident[3]!='1' && ident[3]!='2' && ident[3]!='4' && ident[3]!='8')) | |
986 | return suffix; /* no modification */ | |
987 | nbytes = ident[3] - '0'; | |
988 | ||
989 | reloc = BFD_RELOC_UNUSED; | |
990 | if (suffix == ELF_SUFFIX_GOT) | |
991 | { | |
992 | if (nbytes == 2) | |
993 | reloc = BFD_RELOC_390_GOT16; | |
994 | else if (nbytes == 4) | |
995 | reloc = BFD_RELOC_32_GOT_PCREL; | |
996 | else if (nbytes == 8) | |
997 | reloc = BFD_RELOC_390_GOT64; | |
998 | } | |
999 | else if (suffix == ELF_SUFFIX_PLT) | |
1000 | { | |
1001 | if (nbytes == 4) | |
1002 | reloc = BFD_RELOC_390_PLT32; | |
1003 | else if (nbytes == 8) | |
1004 | reloc = BFD_RELOC_390_PLT64; | |
1005 | } | |
1006 | ||
1007 | if (suffix != ELF_SUFFIX_NONE && reloc == BFD_RELOC_UNUSED) | |
1008 | as_bad (_("Invalid suffix for literal pool entry")); | |
1009 | ||
1010 | /* Search the pool if the new entry is a duplicate. */ | |
1011 | if (exp_p->X_op == O_big) | |
1012 | { | |
1013 | /* Special processing for big numbers. */ | |
1014 | for (lpe = lpe_list; lpe != NULL; lpe = lpe->next) | |
1015 | { | |
1016 | if (lpe->ex.X_op == O_big) | |
1017 | { | |
1018 | if (exp_p->X_add_number <= 0 && lpe->ex.X_add_number <= 0) | |
1019 | { | |
1020 | if (memcmp (&generic_floating_point_number, &lpe->floatnum, | |
1021 | sizeof (FLONUM_TYPE)) == 0) | |
1022 | break; | |
1023 | } | |
1024 | else if (exp_p->X_add_number == lpe->ex.X_add_number) | |
1025 | { | |
1026 | if (memcmp (generic_bignum, lpe->bignum, | |
1027 | sizeof (LITTLENUM_TYPE)*exp_p->X_add_number) == 0) | |
1028 | break; | |
1029 | } | |
1030 | } | |
1031 | } | |
1032 | } | |
1033 | else | |
1034 | { | |
1035 | /* Processing for 'normal' data types. */ | |
1036 | for (lpe = lpe_list; lpe != NULL; lpe = lpe->next) | |
1037 | if (lpe->nbytes == nbytes && lpe->reloc == reloc | |
1038 | && s390_exp_compare (exp_p, &lpe->ex) != 0) | |
1039 | break; | |
1040 | } | |
1041 | ||
1042 | if (lpe == NULL) | |
1043 | { | |
1044 | /* A new literal. */ | |
1045 | if (lpe_free_list != NULL) | |
1046 | { | |
1047 | lpe = lpe_free_list; | |
1048 | lpe_free_list = lpe_free_list->next; | |
1049 | } | |
1050 | else | |
1051 | { | |
1052 | lpe = XNEW (struct s390_lpe); | |
1053 | } | |
1054 | ||
1055 | lpe->ex = *exp_p; | |
1056 | ||
1057 | if (exp_p->X_op == O_big) | |
1058 | { | |
1059 | if (exp_p->X_add_number <= 0) | |
1060 | lpe->floatnum = generic_floating_point_number; | |
1061 | else if (exp_p->X_add_number <= 4) | |
1062 | memcpy (lpe->bignum, generic_bignum, | |
1063 | exp_p->X_add_number * sizeof (LITTLENUM_TYPE)); | |
1064 | else | |
1065 | as_bad (_("Big number is too big")); | |
1066 | } | |
1067 | ||
1068 | lpe->nbytes = nbytes; | |
1069 | lpe->reloc = reloc; | |
1070 | /* Literal pool name defined ? */ | |
1071 | if (lp_sym == NULL) | |
1072 | { | |
1073 | sprintf (tmp_name, ".L\001%i", lp_count); | |
1074 | lp_sym = symbol_make (tmp_name); | |
1075 | } | |
1076 | ||
1077 | /* Make name for literal pool entry. */ | |
1078 | sprintf (tmp_name, ".L\001%i\002%i", lp_count, lpe_count); | |
1079 | lpe_count++; | |
1080 | lpe->sym = symbol_make (tmp_name); | |
1081 | ||
1082 | /* Add to literal pool list. */ | |
1083 | lpe->next = NULL; | |
1084 | if (lpe_list_tail != NULL) | |
1085 | { | |
1086 | lpe_list_tail->next = lpe; | |
1087 | lpe_list_tail = lpe; | |
1088 | } | |
1089 | else | |
1090 | lpe_list = lpe_list_tail = lpe; | |
1091 | } | |
1092 | ||
1093 | /* Now change exp_p to the offset into the literal pool. | |
1094 | That's the expression: .L^Ax^By-.L^Ax */ | |
1095 | exp_p->X_add_symbol = lpe->sym; | |
1096 | exp_p->X_op_symbol = lp_sym; | |
1097 | exp_p->X_op = O_subtract; | |
1098 | exp_p->X_add_number = 0; | |
1099 | ||
1100 | *str_p = str; | |
1101 | ||
1102 | /* We change the suffix type to ELF_SUFFIX_NONE, because | |
1103 | the difference of two local labels is just a number. */ | |
1104 | return ELF_SUFFIX_NONE; | |
1105 | } | |
1106 | ||
1107 | /* Like normal .long/.short/.word, except support @got, etc. | |
1108 | clobbers input_line_pointer, checks end-of-line. */ | |
1109 | static void | |
1110 | s390_elf_cons (int nbytes /* 1=.byte, 2=.word, 4=.long */) | |
1111 | { | |
1112 | expressionS exp; | |
1113 | elf_suffix_type suffix; | |
1114 | ||
1115 | if (is_it_end_of_statement ()) | |
1116 | { | |
1117 | demand_empty_rest_of_line (); | |
1118 | return; | |
1119 | } | |
1120 | ||
1121 | do | |
1122 | { | |
1123 | expression (&exp); | |
1124 | ||
1125 | if (exp.X_op == O_symbol | |
1126 | && *input_line_pointer == '@' | |
1127 | && (suffix = s390_elf_suffix (&input_line_pointer, &exp)) != ELF_SUFFIX_NONE) | |
1128 | { | |
1129 | bfd_reloc_code_real_type reloc; | |
1130 | reloc_howto_type *reloc_howto; | |
1131 | int size; | |
1132 | char *where; | |
1133 | ||
1134 | if (nbytes == 2) | |
1135 | { | |
1136 | static bfd_reloc_code_real_type tab2[] = | |
1137 | { | |
1138 | BFD_RELOC_UNUSED, /* ELF_SUFFIX_NONE */ | |
1139 | BFD_RELOC_390_GOT16, /* ELF_SUFFIX_GOT */ | |
1140 | BFD_RELOC_UNUSED, /* ELF_SUFFIX_PLT */ | |
1141 | BFD_RELOC_UNUSED, /* ELF_SUFFIX_GOTENT */ | |
1142 | BFD_RELOC_16_GOTOFF, /* ELF_SUFFIX_GOTOFF */ | |
1143 | BFD_RELOC_UNUSED, /* ELF_SUFFIX_GOTPLT */ | |
1144 | BFD_RELOC_390_PLTOFF16, /* ELF_SUFFIX_PLTOFF */ | |
1145 | BFD_RELOC_UNUSED, /* ELF_SUFFIX_TLS_GD */ | |
1146 | BFD_RELOC_UNUSED, /* ELF_SUFFIX_TLS_GOTIE */ | |
1147 | BFD_RELOC_UNUSED, /* ELF_SUFFIX_TLS_IE */ | |
1148 | BFD_RELOC_UNUSED, /* ELF_SUFFIX_TLS_LDM */ | |
1149 | BFD_RELOC_UNUSED, /* ELF_SUFFIX_TLS_LDO */ | |
1150 | BFD_RELOC_UNUSED /* ELF_SUFFIX_TLS_LE */ | |
1151 | }; | |
1152 | reloc = tab2[suffix]; | |
1153 | } | |
1154 | else if (nbytes == 4) | |
1155 | { | |
1156 | static bfd_reloc_code_real_type tab4[] = | |
1157 | { | |
1158 | BFD_RELOC_UNUSED, /* ELF_SUFFIX_NONE */ | |
1159 | BFD_RELOC_32_GOT_PCREL, /* ELF_SUFFIX_GOT */ | |
1160 | BFD_RELOC_390_PLT32, /* ELF_SUFFIX_PLT */ | |
1161 | BFD_RELOC_UNUSED, /* ELF_SUFFIX_GOTENT */ | |
1162 | BFD_RELOC_32_GOTOFF, /* ELF_SUFFIX_GOTOFF */ | |
1163 | BFD_RELOC_390_GOTPLT32, /* ELF_SUFFIX_GOTPLT */ | |
1164 | BFD_RELOC_390_PLTOFF32, /* ELF_SUFFIX_PLTOFF */ | |
1165 | BFD_RELOC_390_TLS_GD32, /* ELF_SUFFIX_TLS_GD */ | |
1166 | BFD_RELOC_390_TLS_GOTIE32, /* ELF_SUFFIX_TLS_GOTIE */ | |
1167 | BFD_RELOC_390_TLS_IE32, /* ELF_SUFFIX_TLS_IE */ | |
1168 | BFD_RELOC_390_TLS_LDM32, /* ELF_SUFFIX_TLS_LDM */ | |
1169 | BFD_RELOC_390_TLS_LDO32, /* ELF_SUFFIX_TLS_LDO */ | |
1170 | BFD_RELOC_390_TLS_LE32 /* ELF_SUFFIX_TLS_LE */ | |
1171 | }; | |
1172 | reloc = tab4[suffix]; | |
1173 | } | |
1174 | else if (nbytes == 8) | |
1175 | { | |
1176 | static bfd_reloc_code_real_type tab8[] = | |
1177 | { | |
1178 | BFD_RELOC_UNUSED, /* ELF_SUFFIX_NONE */ | |
1179 | BFD_RELOC_390_GOT64, /* ELF_SUFFIX_GOT */ | |
1180 | BFD_RELOC_390_PLT64, /* ELF_SUFFIX_PLT */ | |
1181 | BFD_RELOC_UNUSED, /* ELF_SUFFIX_GOTENT */ | |
1182 | BFD_RELOC_390_GOTOFF64, /* ELF_SUFFIX_GOTOFF */ | |
1183 | BFD_RELOC_390_GOTPLT64, /* ELF_SUFFIX_GOTPLT */ | |
1184 | BFD_RELOC_390_PLTOFF64, /* ELF_SUFFIX_PLTOFF */ | |
1185 | BFD_RELOC_390_TLS_GD64, /* ELF_SUFFIX_TLS_GD */ | |
1186 | BFD_RELOC_390_TLS_GOTIE64, /* ELF_SUFFIX_TLS_GOTIE */ | |
1187 | BFD_RELOC_390_TLS_IE64, /* ELF_SUFFIX_TLS_IE */ | |
1188 | BFD_RELOC_390_TLS_LDM64, /* ELF_SUFFIX_TLS_LDM */ | |
1189 | BFD_RELOC_390_TLS_LDO64, /* ELF_SUFFIX_TLS_LDO */ | |
1190 | BFD_RELOC_390_TLS_LE64 /* ELF_SUFFIX_TLS_LE */ | |
1191 | }; | |
1192 | reloc = tab8[suffix]; | |
1193 | } | |
1194 | else | |
1195 | reloc = BFD_RELOC_UNUSED; | |
1196 | ||
1197 | if (reloc != BFD_RELOC_UNUSED | |
1198 | && (reloc_howto = bfd_reloc_type_lookup (stdoutput, reloc))) | |
1199 | { | |
1200 | size = bfd_get_reloc_size (reloc_howto); | |
1201 | if (size > nbytes) | |
1202 | as_bad (ngettext ("%s relocations do not fit in %d byte", | |
1203 | "%s relocations do not fit in %d bytes", | |
1204 | nbytes), | |
1205 | reloc_howto->name, nbytes); | |
1206 | where = frag_more (nbytes); | |
1207 | md_number_to_chars (where, 0, size); | |
1208 | /* To make fixup_segment do the pc relative conversion the | |
1209 | pcrel parameter on the fix_new_exp call needs to be FALSE. */ | |
1210 | fix_new_exp (frag_now, where - frag_now->fr_literal, | |
1211 | size, &exp, false, reloc); | |
1212 | } | |
1213 | else | |
1214 | as_bad (_("relocation not applicable")); | |
1215 | } | |
1216 | else | |
1217 | emit_expr (&exp, (unsigned int) nbytes); | |
1218 | } | |
1219 | while (*input_line_pointer++ == ','); | |
1220 | ||
1221 | input_line_pointer--; /* Put terminator back into stream. */ | |
1222 | demand_empty_rest_of_line (); | |
1223 | } | |
1224 | ||
1225 | /* Return true if all remaining operands in the opcode with | |
1226 | OPCODE_FLAGS can be skipped. */ | |
1227 | static bool | |
1228 | skip_optargs_p (unsigned int opcode_flags, const unsigned char *opindex_ptr) | |
1229 | { | |
1230 | if ((opcode_flags & (S390_INSTR_FLAG_OPTPARM | S390_INSTR_FLAG_OPTPARM2)) | |
1231 | && opindex_ptr[0] != '\0' | |
1232 | && opindex_ptr[1] == '\0') | |
1233 | return true; | |
1234 | ||
1235 | if ((opcode_flags & S390_INSTR_FLAG_OPTPARM2) | |
1236 | && opindex_ptr[0] != '\0' | |
1237 | && opindex_ptr[1] != '\0' | |
1238 | && opindex_ptr[2] == '\0') | |
1239 | return true; | |
1240 | return false; | |
1241 | } | |
1242 | ||
1243 | /* We need to keep a list of fixups. We can't simply generate them as | |
1244 | we go, because that would require us to first create the frag, and | |
1245 | that would screw up references to ``.''. */ | |
1246 | ||
1247 | struct s390_fixup | |
1248 | { | |
1249 | expressionS exp; | |
1250 | int opindex; | |
1251 | bfd_reloc_code_real_type reloc; | |
1252 | }; | |
1253 | ||
1254 | #define MAX_INSN_FIXUPS (4) | |
1255 | ||
1256 | /* This routine is called for each instruction to be assembled. */ | |
1257 | ||
1258 | static char * | |
1259 | md_gather_operands (char *str, | |
1260 | unsigned char *insn, | |
1261 | const struct s390_opcode *opcode) | |
1262 | { | |
1263 | struct s390_fixup fixups[MAX_INSN_FIXUPS]; | |
1264 | const struct s390_operand *operand; | |
1265 | const unsigned char *opindex_ptr; | |
1266 | expressionS ex; | |
1267 | elf_suffix_type suffix; | |
1268 | bfd_reloc_code_real_type reloc; | |
1269 | int skip_optional; | |
1270 | char *f; | |
1271 | int fc, i; | |
1272 | ||
1273 | while (ISSPACE (*str)) | |
1274 | str++; | |
1275 | ||
1276 | skip_optional = 0; | |
1277 | ||
1278 | /* Gather the operands. */ | |
1279 | fc = 0; | |
1280 | for (opindex_ptr = opcode->operands; *opindex_ptr != 0; opindex_ptr++) | |
1281 | { | |
1282 | char *hold; | |
1283 | ||
1284 | operand = s390_operands + *opindex_ptr; | |
1285 | ||
1286 | if ((opcode->flags & (S390_INSTR_FLAG_OPTPARM | S390_INSTR_FLAG_OPTPARM2)) | |
1287 | && *str == '\0') | |
1288 | { | |
1289 | /* Optional parameters might need to be ORed with a | |
1290 | value so calling s390_insert_operand is needed. */ | |
1291 | s390_insert_operand (insn, operand, 0, NULL, 0); | |
1292 | break; | |
1293 | } | |
1294 | ||
1295 | if (skip_optional && (operand->flags & S390_OPERAND_INDEX)) | |
1296 | { | |
1297 | /* We do an early skip. For D(X,B) constructions the index | |
1298 | register is skipped (X is optional). For D(L,B) the base | |
1299 | register will be the skipped operand, because L is NOT | |
1300 | optional. */ | |
1301 | skip_optional = 0; | |
1302 | continue; | |
1303 | } | |
1304 | ||
1305 | /* Gather the operand. */ | |
1306 | hold = input_line_pointer; | |
1307 | input_line_pointer = str; | |
1308 | ||
1309 | /* Parse the operand. */ | |
1310 | if (! register_name (&ex)) | |
1311 | expression (&ex); | |
1312 | ||
1313 | str = input_line_pointer; | |
1314 | input_line_pointer = hold; | |
1315 | ||
1316 | /* Write the operand to the insn. */ | |
1317 | if (ex.X_op == O_illegal) | |
1318 | as_bad (_("illegal operand")); | |
1319 | else if (ex.X_op == O_absent) | |
1320 | { | |
1321 | if (opindex_ptr[0] == '\0') | |
1322 | break; | |
1323 | as_bad (_("missing operand")); | |
1324 | } | |
1325 | else if (ex.X_op == O_register || ex.X_op == O_constant) | |
1326 | { | |
1327 | s390_lit_suffix (&str, &ex, ELF_SUFFIX_NONE); | |
1328 | ||
1329 | if (ex.X_op != O_register && ex.X_op != O_constant) | |
1330 | { | |
1331 | /* We need to generate a fixup for the | |
1332 | expression returned by s390_lit_suffix. */ | |
1333 | if (fc >= MAX_INSN_FIXUPS) | |
1334 | as_fatal (_("too many fixups")); | |
1335 | fixups[fc].exp = ex; | |
1336 | fixups[fc].opindex = *opindex_ptr; | |
1337 | fixups[fc].reloc = BFD_RELOC_UNUSED; | |
1338 | ++fc; | |
1339 | } | |
1340 | else | |
1341 | { | |
1342 | if ((operand->flags & S390_OPERAND_LENGTH) | |
1343 | && ex.X_op != O_constant) | |
1344 | as_fatal (_("invalid length field specified")); | |
1345 | if ((operand->flags & S390_OPERAND_INDEX) | |
1346 | && ex.X_add_number == 0 | |
1347 | && warn_areg_zero) | |
1348 | as_warn (_("index register specified but zero")); | |
1349 | if ((operand->flags & S390_OPERAND_BASE) | |
1350 | && ex.X_add_number == 0 | |
1351 | && warn_areg_zero) | |
1352 | as_warn (_("base register specified but zero")); | |
1353 | if ((operand->flags & S390_OPERAND_GPR) | |
1354 | && (operand->flags & S390_OPERAND_REG_PAIR) | |
1355 | && (ex.X_add_number & 1)) | |
1356 | as_fatal (_("odd numbered general purpose register specified as " | |
1357 | "register pair")); | |
1358 | if ((operand->flags & S390_OPERAND_FPR) | |
1359 | && (operand->flags & S390_OPERAND_REG_PAIR) | |
1360 | && ex.X_add_number != 0 && ex.X_add_number != 1 | |
1361 | && ex.X_add_number != 4 && ex.X_add_number != 5 | |
1362 | && ex.X_add_number != 8 && ex.X_add_number != 9 | |
1363 | && ex.X_add_number != 12 && ex.X_add_number != 13) | |
1364 | as_fatal (_("invalid floating point register pair. Valid fp " | |
1365 | "register pair operands are 0, 1, 4, 5, 8, 9, " | |
1366 | "12 or 13.")); | |
1367 | s390_insert_operand (insn, operand, ex.X_add_number, NULL, 0); | |
1368 | } | |
1369 | } | |
1370 | else | |
1371 | { | |
1372 | suffix = s390_elf_suffix (&str, &ex); | |
1373 | suffix = s390_lit_suffix (&str, &ex, suffix); | |
1374 | reloc = BFD_RELOC_UNUSED; | |
1375 | ||
1376 | if (suffix == ELF_SUFFIX_GOT) | |
1377 | { | |
1378 | if ((operand->flags & S390_OPERAND_DISP) && | |
1379 | (operand->bits == 12)) | |
1380 | reloc = BFD_RELOC_390_GOT12; | |
1381 | else if ((operand->flags & S390_OPERAND_DISP) && | |
1382 | (operand->bits == 20)) | |
1383 | reloc = BFD_RELOC_390_GOT20; | |
1384 | else if ((operand->flags & S390_OPERAND_SIGNED) | |
1385 | && (operand->bits == 16)) | |
1386 | reloc = BFD_RELOC_390_GOT16; | |
1387 | else if ((operand->flags & S390_OPERAND_PCREL) | |
1388 | && (operand->bits == 32)) | |
1389 | reloc = BFD_RELOC_390_GOTENT; | |
1390 | } | |
1391 | else if (suffix == ELF_SUFFIX_PLT) | |
1392 | { | |
1393 | if ((operand->flags & S390_OPERAND_PCREL) | |
1394 | && (operand->bits == 12)) | |
1395 | reloc = BFD_RELOC_390_PLT12DBL; | |
1396 | else if ((operand->flags & S390_OPERAND_PCREL) | |
1397 | && (operand->bits == 16)) | |
1398 | reloc = BFD_RELOC_390_PLT16DBL; | |
1399 | else if ((operand->flags & S390_OPERAND_PCREL) | |
1400 | && (operand->bits == 24)) | |
1401 | reloc = BFD_RELOC_390_PLT24DBL; | |
1402 | else if ((operand->flags & S390_OPERAND_PCREL) | |
1403 | && (operand->bits == 32)) | |
1404 | reloc = BFD_RELOC_390_PLT32DBL; | |
1405 | } | |
1406 | else if (suffix == ELF_SUFFIX_GOTENT) | |
1407 | { | |
1408 | if ((operand->flags & S390_OPERAND_PCREL) | |
1409 | && (operand->bits == 32)) | |
1410 | reloc = BFD_RELOC_390_GOTENT; | |
1411 | } | |
1412 | else if (suffix == ELF_SUFFIX_GOTOFF) | |
1413 | { | |
1414 | if ((operand->flags & S390_OPERAND_SIGNED) | |
1415 | && (operand->bits == 16)) | |
1416 | reloc = BFD_RELOC_16_GOTOFF; | |
1417 | } | |
1418 | else if (suffix == ELF_SUFFIX_PLTOFF) | |
1419 | { | |
1420 | if ((operand->flags & S390_OPERAND_SIGNED) | |
1421 | && (operand->bits == 16)) | |
1422 | reloc = BFD_RELOC_390_PLTOFF16; | |
1423 | } | |
1424 | else if (suffix == ELF_SUFFIX_GOTPLT) | |
1425 | { | |
1426 | if ((operand->flags & S390_OPERAND_DISP) | |
1427 | && (operand->bits == 12)) | |
1428 | reloc = BFD_RELOC_390_GOTPLT12; | |
1429 | else if ((operand->flags & S390_OPERAND_SIGNED) | |
1430 | && (operand->bits == 16)) | |
1431 | reloc = BFD_RELOC_390_GOTPLT16; | |
1432 | else if ((operand->flags & S390_OPERAND_PCREL) | |
1433 | && (operand->bits == 32)) | |
1434 | reloc = BFD_RELOC_390_GOTPLTENT; | |
1435 | } | |
1436 | else if (suffix == ELF_SUFFIX_TLS_GOTIE) | |
1437 | { | |
1438 | if ((operand->flags & S390_OPERAND_DISP) | |
1439 | && (operand->bits == 12)) | |
1440 | reloc = BFD_RELOC_390_TLS_GOTIE12; | |
1441 | else if ((operand->flags & S390_OPERAND_DISP) | |
1442 | && (operand->bits == 20)) | |
1443 | reloc = BFD_RELOC_390_TLS_GOTIE20; | |
1444 | } | |
1445 | else if (suffix == ELF_SUFFIX_TLS_IE) | |
1446 | { | |
1447 | if ((operand->flags & S390_OPERAND_PCREL) | |
1448 | && (operand->bits == 32)) | |
1449 | reloc = BFD_RELOC_390_TLS_IEENT; | |
1450 | } | |
1451 | ||
1452 | if (suffix != ELF_SUFFIX_NONE && reloc == BFD_RELOC_UNUSED) | |
1453 | as_bad (_("invalid operand suffix")); | |
1454 | /* We need to generate a fixup of type 'reloc' for this | |
1455 | expression. */ | |
1456 | if (fc >= MAX_INSN_FIXUPS) | |
1457 | as_fatal (_("too many fixups")); | |
1458 | fixups[fc].exp = ex; | |
1459 | fixups[fc].opindex = *opindex_ptr; | |
1460 | fixups[fc].reloc = reloc; | |
1461 | ++fc; | |
1462 | } | |
1463 | ||
1464 | /* Check the next character. The call to expression has advanced | |
1465 | str past any whitespace. */ | |
1466 | if (operand->flags & S390_OPERAND_DISP) | |
1467 | { | |
1468 | /* After a displacement a block in parentheses can start. */ | |
1469 | if (*str != '(') | |
1470 | { | |
1471 | /* Check if parenthesized block can be skipped. If the next | |
1472 | operand is neither an optional operand nor a base register | |
1473 | then we have a syntax error. */ | |
1474 | operand = s390_operands + *(++opindex_ptr); | |
1475 | if (!(operand->flags & (S390_OPERAND_INDEX|S390_OPERAND_BASE))) | |
1476 | as_bad (_("syntax error; missing '(' after displacement")); | |
1477 | ||
1478 | /* Ok, skip all operands until S390_OPERAND_BASE. */ | |
1479 | while (!(operand->flags & S390_OPERAND_BASE)) | |
1480 | operand = s390_operands + *(++opindex_ptr); | |
1481 | ||
1482 | if (*str == '\0' && skip_optargs_p (opcode->flags, &opindex_ptr[1])) | |
1483 | continue; | |
1484 | ||
1485 | /* If there is a next operand it must be separated by a comma. */ | |
1486 | if (opindex_ptr[1] != '\0') | |
1487 | { | |
1488 | if (*str != ',') | |
1489 | { | |
1490 | while (opindex_ptr[1] != '\0') | |
1491 | { | |
1492 | operand = s390_operands + *(++opindex_ptr); | |
1493 | as_bad (_("syntax error; expected ','")); | |
1494 | break; | |
1495 | } | |
1496 | } | |
1497 | else | |
1498 | str++; | |
1499 | } | |
1500 | } | |
1501 | else | |
1502 | { | |
1503 | /* We found an opening parentheses. */ | |
1504 | str++; | |
1505 | for (f = str; *f != '\0'; f++) | |
1506 | if (*f == ',' || *f == ')') | |
1507 | break; | |
1508 | /* If there is no comma until the closing parentheses OR | |
1509 | there is a comma right after the opening parentheses, | |
1510 | we have to skip optional operands. */ | |
1511 | if (*f == ',' && f == str) | |
1512 | { | |
1513 | /* comma directly after '(' ? */ | |
1514 | skip_optional = 1; | |
1515 | str++; | |
1516 | } | |
1517 | else | |
1518 | skip_optional = (*f != ','); | |
1519 | } | |
1520 | } | |
1521 | else if (operand->flags & S390_OPERAND_BASE) | |
1522 | { | |
1523 | /* After the base register the parenthesised block ends. */ | |
1524 | if (*str++ != ')') | |
1525 | as_bad (_("syntax error; missing ')' after base register")); | |
1526 | skip_optional = 0; | |
1527 | ||
1528 | if (*str == '\0' && skip_optargs_p (opcode->flags, &opindex_ptr[1])) | |
1529 | continue; | |
1530 | ||
1531 | /* If there is a next operand it must be separated by a comma. */ | |
1532 | if (opindex_ptr[1] != '\0') | |
1533 | { | |
1534 | if (*str != ',') | |
1535 | { | |
1536 | while (opindex_ptr[1] != '\0') | |
1537 | { | |
1538 | operand = s390_operands + *(++opindex_ptr); | |
1539 | as_bad (_("syntax error; expected ','")); | |
1540 | break; | |
1541 | } | |
1542 | } | |
1543 | else | |
1544 | str++; | |
1545 | } | |
1546 | } | |
1547 | else | |
1548 | { | |
1549 | /* We can find an 'early' closing parentheses in e.g. D(L) instead | |
1550 | of D(L,B). In this case the base register has to be skipped. */ | |
1551 | if (*str == ')') | |
1552 | { | |
1553 | operand = s390_operands + *(++opindex_ptr); | |
1554 | ||
1555 | if (!(operand->flags & S390_OPERAND_BASE)) | |
1556 | as_bad (_("syntax error; ')' not allowed here")); | |
1557 | str++; | |
1558 | } | |
1559 | ||
1560 | if (*str == '\0' && skip_optargs_p (opcode->flags, &opindex_ptr[1])) | |
1561 | continue; | |
1562 | ||
1563 | /* If there is a next operand it must be separated by a comma. */ | |
1564 | if (opindex_ptr[1] != '\0') | |
1565 | { | |
1566 | if (*str != ',') | |
1567 | { | |
1568 | while (opindex_ptr[1] != '\0') | |
1569 | { | |
1570 | operand = s390_operands + *(++opindex_ptr); | |
1571 | as_bad (_("syntax error; expected ','")); | |
1572 | break; | |
1573 | } | |
1574 | } | |
1575 | else | |
1576 | str++; | |
1577 | } | |
1578 | } | |
1579 | } | |
1580 | ||
1581 | while (ISSPACE (*str)) | |
1582 | ++str; | |
1583 | ||
1584 | /* Check for tls instruction marker. */ | |
1585 | reloc = s390_tls_suffix (&str, &ex); | |
1586 | if (reloc != BFD_RELOC_UNUSED) | |
1587 | { | |
1588 | /* We need to generate a fixup of type 'reloc' for this | |
1589 | instruction. */ | |
1590 | if (fc >= MAX_INSN_FIXUPS) | |
1591 | as_fatal (_("too many fixups")); | |
1592 | fixups[fc].exp = ex; | |
1593 | fixups[fc].opindex = -1; | |
1594 | fixups[fc].reloc = reloc; | |
1595 | ++fc; | |
1596 | } | |
1597 | ||
1598 | if (*str != '\0') | |
1599 | { | |
1600 | char *linefeed; | |
1601 | ||
1602 | if ((linefeed = strchr (str, '\n')) != NULL) | |
1603 | *linefeed = '\0'; | |
1604 | as_bad (_("junk at end of line: `%s'"), str); | |
1605 | if (linefeed != NULL) | |
1606 | *linefeed = '\n'; | |
1607 | } | |
1608 | ||
1609 | /* Write out the instruction. */ | |
1610 | f = frag_more (opcode->oplen); | |
1611 | memcpy (f, insn, opcode->oplen); | |
1612 | dwarf2_emit_insn (opcode->oplen); | |
1613 | ||
1614 | /* Create any fixups. At this point we do not use a | |
1615 | bfd_reloc_code_real_type, but instead just use the | |
1616 | BFD_RELOC_UNUSED plus the operand index. This lets us easily | |
1617 | handle fixups for any operand type, although that is admittedly | |
1618 | not a very exciting feature. We pick a BFD reloc type in | |
1619 | md_apply_fix. */ | |
1620 | for (i = 0; i < fc; i++) | |
1621 | { | |
1622 | ||
1623 | if (fixups[i].opindex < 0) | |
1624 | { | |
1625 | /* Create tls instruction marker relocation. */ | |
1626 | fix_new_exp (frag_now, f - frag_now->fr_literal, opcode->oplen, | |
1627 | &fixups[i].exp, 0, fixups[i].reloc); | |
1628 | continue; | |
1629 | } | |
1630 | ||
1631 | operand = s390_operands + fixups[i].opindex; | |
1632 | ||
1633 | if (fixups[i].reloc != BFD_RELOC_UNUSED) | |
1634 | { | |
1635 | reloc_howto_type *reloc_howto; | |
1636 | fixS *fixP; | |
1637 | int size; | |
1638 | ||
1639 | reloc_howto = bfd_reloc_type_lookup (stdoutput, fixups[i].reloc); | |
1640 | if (!reloc_howto) | |
1641 | abort (); | |
1642 | ||
1643 | size = ((reloc_howto->bitsize - 1) / 8) + 1; | |
1644 | ||
1645 | if (size < 1 || size > 4) | |
1646 | abort (); | |
1647 | ||
1648 | fixP = fix_new_exp (frag_now, | |
1649 | f - frag_now->fr_literal + (operand->shift/8), | |
1650 | size, &fixups[i].exp, reloc_howto->pc_relative, | |
1651 | fixups[i].reloc); | |
1652 | /* Turn off overflow checking in fixup_segment. This is necessary | |
1653 | because fixup_segment will signal an overflow for large 4 byte | |
1654 | quantities for GOT12 relocations. */ | |
1655 | if ( fixups[i].reloc == BFD_RELOC_390_GOT12 | |
1656 | || fixups[i].reloc == BFD_RELOC_390_GOT20 | |
1657 | || fixups[i].reloc == BFD_RELOC_390_GOT16) | |
1658 | fixP->fx_no_overflow = 1; | |
1659 | ||
1660 | if (operand->flags & S390_OPERAND_PCREL) | |
1661 | fixP->fx_pcrel_adjust = operand->shift / 8; | |
1662 | } | |
1663 | else | |
1664 | fix_new_exp (frag_now, f - frag_now->fr_literal, 4, &fixups[i].exp, | |
1665 | (operand->flags & S390_OPERAND_PCREL) != 0, | |
1666 | ((bfd_reloc_code_real_type) | |
1667 | (fixups[i].opindex + (int) BFD_RELOC_UNUSED))); | |
1668 | } | |
1669 | return str; | |
1670 | } | |
1671 | ||
1672 | /* This routine is called for each instruction to be assembled. */ | |
1673 | ||
1674 | void | |
1675 | md_assemble (char *str) | |
1676 | { | |
1677 | const struct s390_opcode *opcode; | |
1678 | unsigned char insn[6]; | |
1679 | char *s; | |
1680 | ||
1681 | /* Get the opcode. */ | |
1682 | for (s = str; *s != '\0' && ! ISSPACE (*s); s++) | |
1683 | ; | |
1684 | if (*s != '\0') | |
1685 | *s++ = '\0'; | |
1686 | ||
1687 | /* Look up the opcode in the hash table. */ | |
1688 | opcode = (struct s390_opcode *) str_hash_find (s390_opcode_hash, str); | |
1689 | if (opcode == (const struct s390_opcode *) NULL) | |
1690 | { | |
1691 | as_bad (_("Unrecognized opcode: `%s'"), str); | |
1692 | return; | |
1693 | } | |
1694 | else if (!(opcode->modes & current_mode_mask)) | |
1695 | { | |
1696 | as_bad (_("Opcode %s not available in this mode"), str); | |
1697 | return; | |
1698 | } | |
1699 | memcpy (insn, opcode->opcode, sizeof (insn)); | |
1700 | md_gather_operands (s, insn, opcode); | |
1701 | } | |
1702 | ||
1703 | #ifndef WORKING_DOT_WORD | |
1704 | /* Handle long and short jumps. We don't support these */ | |
1705 | void | |
1706 | md_create_short_jump (ptr, from_addr, to_addr, frag, to_symbol) | |
1707 | char *ptr; | |
1708 | addressT from_addr, to_addr; | |
1709 | fragS *frag; | |
1710 | symbolS *to_symbol; | |
1711 | { | |
1712 | abort (); | |
1713 | } | |
1714 | ||
1715 | void | |
1716 | md_create_long_jump (ptr, from_addr, to_addr, frag, to_symbol) | |
1717 | char *ptr; | |
1718 | addressT from_addr, to_addr; | |
1719 | fragS *frag; | |
1720 | symbolS *to_symbol; | |
1721 | { | |
1722 | abort (); | |
1723 | } | |
1724 | #endif | |
1725 | ||
1726 | void | |
1727 | s390_bss (int ignore ATTRIBUTE_UNUSED) | |
1728 | { | |
1729 | /* We don't support putting frags in the BSS segment, we fake it | |
1730 | by marking in_bss, then looking at s_skip for clues. */ | |
1731 | ||
1732 | subseg_set (bss_section, 0); | |
1733 | demand_empty_rest_of_line (); | |
1734 | } | |
1735 | ||
1736 | /* Pseudo-op handling. */ | |
1737 | ||
1738 | void | |
1739 | s390_insn (int ignore ATTRIBUTE_UNUSED) | |
1740 | { | |
1741 | expressionS exp; | |
1742 | const struct s390_opcode *opformat; | |
1743 | unsigned char insn[6]; | |
1744 | char *s; | |
1745 | ||
1746 | /* Get the opcode format. */ | |
1747 | s = input_line_pointer; | |
1748 | while (*s != '\0' && *s != ',' && ! ISSPACE (*s)) | |
1749 | s++; | |
1750 | if (*s != ',') | |
1751 | as_bad (_("Invalid .insn format\n")); | |
1752 | *s++ = '\0'; | |
1753 | ||
1754 | /* Look up the opcode in the hash table. */ | |
1755 | opformat = (struct s390_opcode *) | |
1756 | str_hash_find (s390_opformat_hash, input_line_pointer); | |
1757 | if (opformat == (const struct s390_opcode *) NULL) | |
1758 | { | |
1759 | as_bad (_("Unrecognized opcode format: `%s'"), input_line_pointer); | |
1760 | return; | |
1761 | } | |
1762 | input_line_pointer = s; | |
1763 | expression (&exp); | |
1764 | if (exp.X_op == O_constant) | |
1765 | { | |
1766 | if ( ( opformat->oplen == 6 | |
1767 | && (addressT) exp.X_add_number < (1ULL << 48)) | |
1768 | || ( opformat->oplen == 4 | |
1769 | && (addressT) exp.X_add_number < (1ULL << 32)) | |
1770 | || ( opformat->oplen == 2 | |
1771 | && (addressT) exp.X_add_number < (1ULL << 16))) | |
1772 | md_number_to_chars ((char *) insn, exp.X_add_number, opformat->oplen); | |
1773 | else | |
1774 | as_bad (_("Invalid .insn format\n")); | |
1775 | } | |
1776 | else if (exp.X_op == O_big) | |
1777 | { | |
1778 | if (exp.X_add_number > 0 | |
1779 | && opformat->oplen == 6 | |
1780 | && generic_bignum[3] == 0) | |
1781 | { | |
1782 | md_number_to_chars ((char *) insn, generic_bignum[2], 2); | |
1783 | md_number_to_chars ((char *) &insn[2], generic_bignum[1], 2); | |
1784 | md_number_to_chars ((char *) &insn[4], generic_bignum[0], 2); | |
1785 | } | |
1786 | else | |
1787 | as_bad (_("Invalid .insn format\n")); | |
1788 | } | |
1789 | else | |
1790 | as_bad (_("second operand of .insn not a constant\n")); | |
1791 | ||
1792 | if (strcmp (opformat->name, "e") != 0 && *input_line_pointer++ != ',') | |
1793 | as_bad (_("missing comma after insn constant\n")); | |
1794 | ||
1795 | if ((s = strchr (input_line_pointer, '\n')) != NULL) | |
1796 | *s = '\0'; | |
1797 | input_line_pointer = md_gather_operands (input_line_pointer, insn, | |
1798 | opformat); | |
1799 | if (s != NULL) | |
1800 | *s = '\n'; | |
1801 | demand_empty_rest_of_line (); | |
1802 | } | |
1803 | ||
1804 | /* The .byte pseudo-op. This is similar to the normal .byte | |
1805 | pseudo-op, but it can also take a single ASCII string. */ | |
1806 | ||
1807 | static void | |
1808 | s390_byte (int ignore ATTRIBUTE_UNUSED) | |
1809 | { | |
1810 | if (*input_line_pointer != '\"') | |
1811 | { | |
1812 | cons (1); | |
1813 | return; | |
1814 | } | |
1815 | ||
1816 | /* Gather characters. A real double quote is doubled. Unusual | |
1817 | characters are not permitted. */ | |
1818 | ++input_line_pointer; | |
1819 | while (1) | |
1820 | { | |
1821 | char c; | |
1822 | ||
1823 | c = *input_line_pointer++; | |
1824 | ||
1825 | if (c == '\"') | |
1826 | { | |
1827 | if (*input_line_pointer != '\"') | |
1828 | break; | |
1829 | ++input_line_pointer; | |
1830 | } | |
1831 | ||
1832 | FRAG_APPEND_1_CHAR (c); | |
1833 | } | |
1834 | ||
1835 | demand_empty_rest_of_line (); | |
1836 | } | |
1837 | ||
1838 | /* The .ltorg pseudo-op.This emits all literals defined since the last | |
1839 | .ltorg or the invocation of gas. Literals are defined with the | |
1840 | @lit suffix. */ | |
1841 | ||
1842 | static void | |
1843 | s390_literals (int ignore ATTRIBUTE_UNUSED) | |
1844 | { | |
1845 | struct s390_lpe *lpe; | |
1846 | ||
1847 | if (lp_sym == NULL || lpe_count == 0) | |
1848 | return; /* Nothing to be done. */ | |
1849 | ||
1850 | /* Emit symbol for start of literal pool. */ | |
1851 | S_SET_SEGMENT (lp_sym, now_seg); | |
1852 | S_SET_VALUE (lp_sym, (valueT) frag_now_fix ()); | |
1853 | symbol_set_frag (lp_sym, frag_now); | |
1854 | ||
1855 | while (lpe_list) | |
1856 | { | |
1857 | lpe = lpe_list; | |
1858 | lpe_list = lpe_list->next; | |
1859 | S_SET_SEGMENT (lpe->sym, now_seg); | |
1860 | S_SET_VALUE (lpe->sym, (valueT) frag_now_fix ()); | |
1861 | symbol_set_frag (lpe->sym, frag_now); | |
1862 | ||
1863 | /* Emit literal pool entry. */ | |
1864 | if (lpe->reloc != BFD_RELOC_UNUSED) | |
1865 | { | |
1866 | reloc_howto_type *reloc_howto = | |
1867 | bfd_reloc_type_lookup (stdoutput, lpe->reloc); | |
1868 | int size = bfd_get_reloc_size (reloc_howto); | |
1869 | char *where; | |
1870 | ||
1871 | if (size > lpe->nbytes) | |
1872 | as_bad (ngettext ("%s relocations do not fit in %d byte", | |
1873 | "%s relocations do not fit in %d bytes", | |
1874 | lpe->nbytes), | |
1875 | reloc_howto->name, lpe->nbytes); | |
1876 | where = frag_more (lpe->nbytes); | |
1877 | md_number_to_chars (where, 0, size); | |
1878 | fix_new_exp (frag_now, where - frag_now->fr_literal, | |
1879 | size, &lpe->ex, reloc_howto->pc_relative, lpe->reloc); | |
1880 | } | |
1881 | else | |
1882 | { | |
1883 | if (lpe->ex.X_op == O_big) | |
1884 | { | |
1885 | if (lpe->ex.X_add_number <= 0) | |
1886 | generic_floating_point_number = lpe->floatnum; | |
1887 | else | |
1888 | memcpy (generic_bignum, lpe->bignum, | |
1889 | lpe->ex.X_add_number * sizeof (LITTLENUM_TYPE)); | |
1890 | } | |
1891 | emit_expr (&lpe->ex, lpe->nbytes); | |
1892 | } | |
1893 | ||
1894 | lpe->next = lpe_free_list; | |
1895 | lpe_free_list = lpe; | |
1896 | } | |
1897 | lpe_list_tail = NULL; | |
1898 | lp_sym = NULL; | |
1899 | lp_count++; | |
1900 | lpe_count = 0; | |
1901 | } | |
1902 | ||
1903 | #define MAX_HISTORY 100 | |
1904 | ||
1905 | /* The .machine pseudo op allows one to switch to a different CPU level in | |
1906 | the asm listing. The current CPU setting can be stored on a stack | |
1907 | with .machine push and restored with .machine pop. */ | |
1908 | ||
1909 | static void | |
1910 | s390_machine (int ignore ATTRIBUTE_UNUSED) | |
1911 | { | |
1912 | char *cpu_string; | |
1913 | static struct cpu_history | |
1914 | { | |
1915 | unsigned int cpu; | |
1916 | unsigned int flags; | |
1917 | } *cpu_history; | |
1918 | static int curr_hist; | |
1919 | ||
1920 | SKIP_WHITESPACE (); | |
1921 | ||
1922 | if (*input_line_pointer == '"') | |
1923 | { | |
1924 | int len; | |
1925 | cpu_string = demand_copy_C_string (&len); | |
1926 | } | |
1927 | else | |
1928 | { | |
1929 | char c; | |
1930 | ||
1931 | cpu_string = input_line_pointer; | |
1932 | do | |
1933 | { | |
1934 | char * str; | |
1935 | ||
1936 | c = get_symbol_name (&str); | |
1937 | c = restore_line_pointer (c); | |
1938 | if (c == '+') | |
1939 | ++ input_line_pointer; | |
1940 | } | |
1941 | while (c == '+'); | |
1942 | ||
1943 | c = *input_line_pointer; | |
1944 | *input_line_pointer = 0; | |
1945 | cpu_string = xstrdup (cpu_string); | |
1946 | (void) restore_line_pointer (c); | |
1947 | } | |
1948 | ||
1949 | if (cpu_string != NULL) | |
1950 | { | |
1951 | unsigned int new_cpu = current_cpu; | |
1952 | unsigned int new_flags = current_flags; | |
1953 | ||
1954 | if (strcmp (cpu_string, "push") == 0) | |
1955 | { | |
1956 | if (cpu_history == NULL) | |
1957 | cpu_history = XNEWVEC (struct cpu_history, MAX_HISTORY); | |
1958 | ||
1959 | if (curr_hist >= MAX_HISTORY) | |
1960 | as_bad (_(".machine stack overflow")); | |
1961 | else | |
1962 | { | |
1963 | cpu_history[curr_hist].cpu = current_cpu; | |
1964 | cpu_history[curr_hist].flags = current_flags; | |
1965 | curr_hist++; | |
1966 | } | |
1967 | } | |
1968 | else if (strcmp (cpu_string, "pop") == 0) | |
1969 | { | |
1970 | if (curr_hist <= 0) | |
1971 | as_bad (_(".machine stack underflow")); | |
1972 | else | |
1973 | { | |
1974 | curr_hist--; | |
1975 | new_cpu = cpu_history[curr_hist].cpu; | |
1976 | new_flags = cpu_history[curr_hist].flags; | |
1977 | } | |
1978 | } | |
1979 | else | |
1980 | new_cpu = s390_parse_cpu (cpu_string, &new_flags, true); | |
1981 | ||
1982 | if (new_cpu == S390_OPCODE_MAXCPU) | |
1983 | as_bad (_("invalid machine `%s'"), cpu_string); | |
1984 | ||
1985 | if (new_cpu != current_cpu || new_flags != current_flags) | |
1986 | { | |
1987 | current_cpu = new_cpu; | |
1988 | current_flags = new_flags; | |
1989 | s390_setup_opcodes (); | |
1990 | } | |
1991 | } | |
1992 | ||
1993 | demand_empty_rest_of_line (); | |
1994 | } | |
1995 | ||
1996 | /* The .machinemode pseudo op allows one to switch to a different | |
1997 | architecture mode in the asm listing. The current architecture | |
1998 | mode setting can be stored on a stack with .machinemode push and | |
1999 | restored with .machinemode pop. */ | |
2000 | ||
2001 | static void | |
2002 | s390_machinemode (int ignore ATTRIBUTE_UNUSED) | |
2003 | { | |
2004 | char *mode_string; | |
2005 | static unsigned int *mode_history; | |
2006 | static int curr_hist; | |
2007 | ||
2008 | SKIP_WHITESPACE (); | |
2009 | ||
2010 | { | |
2011 | char c; | |
2012 | ||
2013 | c = get_symbol_name (&mode_string); | |
2014 | mode_string = xstrdup (mode_string); | |
2015 | (void) restore_line_pointer (c); | |
2016 | } | |
2017 | ||
2018 | if (mode_string != NULL) | |
2019 | { | |
2020 | unsigned int old_mode_mask = current_mode_mask; | |
2021 | char *p; | |
2022 | ||
2023 | for (p = mode_string; *p != 0; p++) | |
2024 | *p = TOLOWER (*p); | |
2025 | ||
2026 | if (strcmp (mode_string, "push") == 0) | |
2027 | { | |
2028 | if (mode_history == NULL) | |
2029 | mode_history = XNEWVEC (unsigned int, MAX_HISTORY); | |
2030 | ||
2031 | if (curr_hist >= MAX_HISTORY) | |
2032 | as_bad (_(".machinemode stack overflow")); | |
2033 | else | |
2034 | mode_history[curr_hist++] = current_mode_mask; | |
2035 | } | |
2036 | else if (strcmp (mode_string, "pop") == 0) | |
2037 | { | |
2038 | if (curr_hist <= 0) | |
2039 | as_bad (_(".machinemode stack underflow")); | |
2040 | else | |
2041 | current_mode_mask = mode_history[--curr_hist]; | |
2042 | } | |
2043 | else | |
2044 | { | |
2045 | if (strcmp (mode_string, "esa") == 0) | |
2046 | current_mode_mask = 1 << S390_OPCODE_ESA; | |
2047 | else if (strcmp (mode_string, "zarch") == 0) | |
2048 | { | |
2049 | if (s390_arch_size == 32) | |
2050 | set_highgprs_p = true; | |
2051 | current_mode_mask = 1 << S390_OPCODE_ZARCH; | |
2052 | } | |
2053 | else if (strcmp (mode_string, "zarch_nohighgprs") == 0) | |
2054 | current_mode_mask = 1 << S390_OPCODE_ZARCH; | |
2055 | else | |
2056 | as_bad (_("invalid machine mode `%s'"), mode_string); | |
2057 | } | |
2058 | ||
2059 | if (current_mode_mask != old_mode_mask) | |
2060 | s390_setup_opcodes (); | |
2061 | } | |
2062 | ||
2063 | demand_empty_rest_of_line (); | |
2064 | } | |
2065 | ||
2066 | #undef MAX_HISTORY | |
2067 | ||
2068 | const char * | |
2069 | md_atof (int type, char *litp, int *sizep) | |
2070 | { | |
2071 | return ieee_md_atof (type, litp, sizep, true); | |
2072 | } | |
2073 | ||
2074 | /* Align a section (I don't know why this is machine dependent). */ | |
2075 | ||
2076 | valueT | |
2077 | md_section_align (asection *seg, valueT addr) | |
2078 | { | |
2079 | int align = bfd_section_alignment (seg); | |
2080 | ||
2081 | return ((addr + (1 << align) - 1) & -(1 << align)); | |
2082 | } | |
2083 | ||
2084 | /* We don't have any form of relaxing. */ | |
2085 | ||
2086 | int | |
2087 | md_estimate_size_before_relax (fragS *fragp ATTRIBUTE_UNUSED, | |
2088 | asection *seg ATTRIBUTE_UNUSED) | |
2089 | { | |
2090 | abort (); | |
2091 | return 0; | |
2092 | } | |
2093 | ||
2094 | /* Convert a machine dependent frag. We never generate these. */ | |
2095 | ||
2096 | void | |
2097 | md_convert_frag (bfd *abfd ATTRIBUTE_UNUSED, | |
2098 | asection *sec ATTRIBUTE_UNUSED, | |
2099 | fragS *fragp ATTRIBUTE_UNUSED) | |
2100 | { | |
2101 | abort (); | |
2102 | } | |
2103 | ||
2104 | symbolS * | |
2105 | md_undefined_symbol (char *name) | |
2106 | { | |
2107 | if (*name == '_' && *(name + 1) == 'G' | |
2108 | && strcmp (name, "_GLOBAL_OFFSET_TABLE_") == 0) | |
2109 | { | |
2110 | if (!GOT_symbol) | |
2111 | { | |
2112 | if (symbol_find (name)) | |
2113 | as_bad (_("GOT already in symbol table")); | |
2114 | GOT_symbol = symbol_new (name, undefined_section, | |
2115 | &zero_address_frag, 0); | |
2116 | } | |
2117 | return GOT_symbol; | |
2118 | } | |
2119 | return 0; | |
2120 | } | |
2121 | ||
2122 | /* Functions concerning relocs. */ | |
2123 | ||
2124 | /* The location from which a PC relative jump should be calculated, | |
2125 | given a PC relative reloc. */ | |
2126 | ||
2127 | long | |
2128 | md_pcrel_from_section (fixS *fixp, segT sec ATTRIBUTE_UNUSED) | |
2129 | { | |
2130 | return fixp->fx_frag->fr_address + fixp->fx_where; | |
2131 | } | |
2132 | ||
2133 | /* Here we decide which fixups can be adjusted to make them relative to | |
2134 | the beginning of the section instead of the symbol. Basically we need | |
2135 | to make sure that the dynamic relocations are done correctly, so in | |
2136 | some cases we force the original symbol to be used. */ | |
2137 | int | |
2138 | tc_s390_fix_adjustable (fixS *fixP) | |
2139 | { | |
2140 | /* Don't adjust pc-relative references to merge sections. */ | |
2141 | if (fixP->fx_pcrel | |
2142 | && (S_GET_SEGMENT (fixP->fx_addsy)->flags & SEC_MERGE) != 0) | |
2143 | return 0; | |
2144 | ||
2145 | /* adjust_reloc_syms doesn't know about the GOT. */ | |
2146 | if ( fixP->fx_r_type == BFD_RELOC_16_GOTOFF | |
2147 | || fixP->fx_r_type == BFD_RELOC_32_GOTOFF | |
2148 | || fixP->fx_r_type == BFD_RELOC_390_GOTOFF64 | |
2149 | || fixP->fx_r_type == BFD_RELOC_390_PLTOFF16 | |
2150 | || fixP->fx_r_type == BFD_RELOC_390_PLTOFF32 | |
2151 | || fixP->fx_r_type == BFD_RELOC_390_PLTOFF64 | |
2152 | || fixP->fx_r_type == BFD_RELOC_390_PLT12DBL | |
2153 | || fixP->fx_r_type == BFD_RELOC_390_PLT16DBL | |
2154 | || fixP->fx_r_type == BFD_RELOC_390_PLT24DBL | |
2155 | || fixP->fx_r_type == BFD_RELOC_390_PLT32 | |
2156 | || fixP->fx_r_type == BFD_RELOC_390_PLT32DBL | |
2157 | || fixP->fx_r_type == BFD_RELOC_390_PLT64 | |
2158 | || fixP->fx_r_type == BFD_RELOC_390_GOT12 | |
2159 | || fixP->fx_r_type == BFD_RELOC_390_GOT20 | |
2160 | || fixP->fx_r_type == BFD_RELOC_390_GOT16 | |
2161 | || fixP->fx_r_type == BFD_RELOC_32_GOT_PCREL | |
2162 | || fixP->fx_r_type == BFD_RELOC_390_GOT64 | |
2163 | || fixP->fx_r_type == BFD_RELOC_390_GOTENT | |
2164 | || fixP->fx_r_type == BFD_RELOC_390_GOTPLT12 | |
2165 | || fixP->fx_r_type == BFD_RELOC_390_GOTPLT16 | |
2166 | || fixP->fx_r_type == BFD_RELOC_390_GOTPLT20 | |
2167 | || fixP->fx_r_type == BFD_RELOC_390_GOTPLT32 | |
2168 | || fixP->fx_r_type == BFD_RELOC_390_GOTPLT64 | |
2169 | || fixP->fx_r_type == BFD_RELOC_390_GOTPLTENT | |
2170 | || fixP->fx_r_type == BFD_RELOC_390_TLS_LOAD | |
2171 | || fixP->fx_r_type == BFD_RELOC_390_TLS_GDCALL | |
2172 | || fixP->fx_r_type == BFD_RELOC_390_TLS_LDCALL | |
2173 | || fixP->fx_r_type == BFD_RELOC_390_TLS_GD32 | |
2174 | || fixP->fx_r_type == BFD_RELOC_390_TLS_GD64 | |
2175 | || fixP->fx_r_type == BFD_RELOC_390_TLS_GOTIE12 | |
2176 | || fixP->fx_r_type == BFD_RELOC_390_TLS_GOTIE20 | |
2177 | || fixP->fx_r_type == BFD_RELOC_390_TLS_GOTIE32 | |
2178 | || fixP->fx_r_type == BFD_RELOC_390_TLS_GOTIE64 | |
2179 | || fixP->fx_r_type == BFD_RELOC_390_TLS_LDM32 | |
2180 | || fixP->fx_r_type == BFD_RELOC_390_TLS_LDM64 | |
2181 | || fixP->fx_r_type == BFD_RELOC_390_TLS_IE32 | |
2182 | || fixP->fx_r_type == BFD_RELOC_390_TLS_IE64 | |
2183 | || fixP->fx_r_type == BFD_RELOC_390_TLS_IEENT | |
2184 | || fixP->fx_r_type == BFD_RELOC_390_TLS_LE32 | |
2185 | || fixP->fx_r_type == BFD_RELOC_390_TLS_LE64 | |
2186 | || fixP->fx_r_type == BFD_RELOC_390_TLS_LDO32 | |
2187 | || fixP->fx_r_type == BFD_RELOC_390_TLS_LDO64 | |
2188 | || fixP->fx_r_type == BFD_RELOC_390_TLS_DTPMOD | |
2189 | || fixP->fx_r_type == BFD_RELOC_390_TLS_DTPOFF | |
2190 | || fixP->fx_r_type == BFD_RELOC_390_TLS_TPOFF | |
2191 | || fixP->fx_r_type == BFD_RELOC_VTABLE_INHERIT | |
2192 | || fixP->fx_r_type == BFD_RELOC_VTABLE_ENTRY) | |
2193 | return 0; | |
2194 | return 1; | |
2195 | } | |
2196 | ||
2197 | /* Return true if we must always emit a reloc for a type and false if | |
2198 | there is some hope of resolving it at assembly time. */ | |
2199 | int | |
2200 | tc_s390_force_relocation (struct fix *fixp) | |
2201 | { | |
2202 | /* Ensure we emit a relocation for every reference to the global | |
2203 | offset table or to the procedure link table. */ | |
2204 | switch (fixp->fx_r_type) | |
2205 | { | |
2206 | case BFD_RELOC_390_GOT12: | |
2207 | case BFD_RELOC_390_GOT20: | |
2208 | case BFD_RELOC_32_GOT_PCREL: | |
2209 | case BFD_RELOC_32_GOTOFF: | |
2210 | case BFD_RELOC_390_GOTOFF64: | |
2211 | case BFD_RELOC_390_PLTOFF16: | |
2212 | case BFD_RELOC_390_PLTOFF32: | |
2213 | case BFD_RELOC_390_PLTOFF64: | |
2214 | case BFD_RELOC_390_GOTPC: | |
2215 | case BFD_RELOC_390_GOT16: | |
2216 | case BFD_RELOC_390_GOTPCDBL: | |
2217 | case BFD_RELOC_390_GOT64: | |
2218 | case BFD_RELOC_390_GOTENT: | |
2219 | case BFD_RELOC_390_PLT32: | |
2220 | case BFD_RELOC_390_PLT12DBL: | |
2221 | case BFD_RELOC_390_PLT16DBL: | |
2222 | case BFD_RELOC_390_PLT24DBL: | |
2223 | case BFD_RELOC_390_PLT32DBL: | |
2224 | case BFD_RELOC_390_PLT64: | |
2225 | case BFD_RELOC_390_GOTPLT12: | |
2226 | case BFD_RELOC_390_GOTPLT16: | |
2227 | case BFD_RELOC_390_GOTPLT20: | |
2228 | case BFD_RELOC_390_GOTPLT32: | |
2229 | case BFD_RELOC_390_GOTPLT64: | |
2230 | case BFD_RELOC_390_GOTPLTENT: | |
2231 | return 1; | |
2232 | default: | |
2233 | break; | |
2234 | } | |
2235 | ||
2236 | return generic_force_reloc (fixp); | |
2237 | } | |
2238 | ||
2239 | /* Apply a fixup to the object code. This is called for all the | |
2240 | fixups we generated by the call to fix_new_exp, above. In the call | |
2241 | above we used a reloc code which was the largest legal reloc code | |
2242 | plus the operand index. Here we undo that to recover the operand | |
2243 | index. At this point all symbol values should be fully resolved, | |
2244 | and we attempt to completely resolve the reloc. If we can not do | |
2245 | that, we determine the correct reloc code and put it back in the | |
2246 | fixup. */ | |
2247 | ||
2248 | void | |
2249 | md_apply_fix (fixS *fixP, valueT *valP, segT seg ATTRIBUTE_UNUSED) | |
2250 | { | |
2251 | char *where; | |
2252 | valueT value = *valP; | |
2253 | ||
2254 | where = fixP->fx_frag->fr_literal + fixP->fx_where; | |
2255 | ||
2256 | if (fixP->fx_subsy != NULL) | |
2257 | as_bad_subtract (fixP); | |
2258 | ||
2259 | if (fixP->fx_addsy != NULL) | |
2260 | { | |
2261 | if (fixP->fx_pcrel) | |
2262 | value += fixP->fx_frag->fr_address + fixP->fx_where; | |
2263 | } | |
2264 | else | |
2265 | fixP->fx_done = 1; | |
2266 | ||
2267 | if ((int) fixP->fx_r_type >= (int) BFD_RELOC_UNUSED) | |
2268 | { | |
2269 | const struct s390_operand *operand; | |
2270 | int opindex; | |
2271 | ||
2272 | opindex = (int) fixP->fx_r_type - (int) BFD_RELOC_UNUSED; | |
2273 | operand = &s390_operands[opindex]; | |
2274 | ||
2275 | if (fixP->fx_done) | |
2276 | { | |
2277 | /* Insert the fully resolved operand value. */ | |
2278 | s390_insert_operand ((unsigned char *) where, operand, | |
2279 | (offsetT) value, fixP->fx_file, fixP->fx_line); | |
2280 | return; | |
2281 | } | |
2282 | ||
2283 | /* Determine a BFD reloc value based on the operand information. | |
2284 | We are only prepared to turn a few of the operands into | |
2285 | relocs. */ | |
2286 | fixP->fx_offset = value; | |
2287 | if (operand->bits == 12 && operand->shift == 20) | |
2288 | { | |
2289 | fixP->fx_size = 2; | |
2290 | fixP->fx_where += 2; | |
2291 | fixP->fx_r_type = BFD_RELOC_390_12; | |
2292 | } | |
2293 | else if (operand->bits == 12 && operand->shift == 36) | |
2294 | { | |
2295 | fixP->fx_size = 2; | |
2296 | fixP->fx_where += 4; | |
2297 | fixP->fx_r_type = BFD_RELOC_390_12; | |
2298 | } | |
2299 | else if (operand->bits == 20 && operand->shift == 20) | |
2300 | { | |
2301 | fixP->fx_size = 4; | |
2302 | fixP->fx_where += 2; | |
2303 | fixP->fx_r_type = BFD_RELOC_390_20; | |
2304 | } | |
2305 | else if (operand->bits == 8 && operand->shift == 8) | |
2306 | { | |
2307 | fixP->fx_size = 1; | |
2308 | fixP->fx_where += 1; | |
2309 | fixP->fx_r_type = BFD_RELOC_8; | |
2310 | } | |
2311 | else if (operand->bits == 12 && operand->shift == 12 | |
2312 | && (operand->flags & S390_OPERAND_PCREL)) | |
2313 | { | |
2314 | fixP->fx_size = 2; | |
2315 | fixP->fx_where += 1; | |
2316 | fixP->fx_offset += 1; | |
2317 | fixP->fx_pcrel_adjust = 1; | |
2318 | fixP->fx_r_type = BFD_RELOC_390_PC12DBL; | |
2319 | } | |
2320 | else if (operand->bits == 16 && operand->shift == 16) | |
2321 | { | |
2322 | fixP->fx_size = 2; | |
2323 | fixP->fx_where += 2; | |
2324 | if (operand->flags & S390_OPERAND_PCREL) | |
2325 | { | |
2326 | fixP->fx_r_type = BFD_RELOC_390_PC16DBL; | |
2327 | fixP->fx_offset += 2; | |
2328 | fixP->fx_pcrel_adjust = 2; | |
2329 | } | |
2330 | else | |
2331 | fixP->fx_r_type = BFD_RELOC_16; | |
2332 | } | |
2333 | else if (operand->bits == 16 && operand->shift == 32 | |
2334 | && (operand->flags & S390_OPERAND_PCREL)) | |
2335 | { | |
2336 | fixP->fx_size = 2; | |
2337 | fixP->fx_where += 4; | |
2338 | fixP->fx_offset += 4; | |
2339 | fixP->fx_pcrel_adjust = 4; | |
2340 | fixP->fx_r_type = BFD_RELOC_390_PC16DBL; | |
2341 | } | |
2342 | else if (operand->bits == 24 && operand->shift == 24 | |
2343 | && (operand->flags & S390_OPERAND_PCREL)) | |
2344 | { | |
2345 | fixP->fx_size = 3; | |
2346 | fixP->fx_where += 3; | |
2347 | fixP->fx_offset += 3; | |
2348 | fixP->fx_pcrel_adjust = 3; | |
2349 | fixP->fx_r_type = BFD_RELOC_390_PC24DBL; | |
2350 | } | |
2351 | else if (operand->bits == 32 && operand->shift == 16 | |
2352 | && (operand->flags & S390_OPERAND_PCREL)) | |
2353 | { | |
2354 | fixP->fx_size = 4; | |
2355 | fixP->fx_where += 2; | |
2356 | fixP->fx_offset += 2; | |
2357 | fixP->fx_pcrel_adjust = 2; | |
2358 | fixP->fx_r_type = BFD_RELOC_390_PC32DBL; | |
2359 | } | |
2360 | else | |
2361 | { | |
2362 | const char *sfile; | |
2363 | unsigned int sline; | |
2364 | ||
2365 | /* Use expr_symbol_where to see if this is an expression | |
2366 | symbol. */ | |
2367 | if (expr_symbol_where (fixP->fx_addsy, &sfile, &sline)) | |
2368 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
2369 | _("unresolved expression that must be resolved")); | |
2370 | else | |
2371 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
2372 | _("unsupported relocation type")); | |
2373 | fixP->fx_done = 1; | |
2374 | return; | |
2375 | } | |
2376 | } | |
2377 | else | |
2378 | { | |
2379 | switch (fixP->fx_r_type) | |
2380 | { | |
2381 | case BFD_RELOC_8: | |
2382 | if (fixP->fx_pcrel) | |
2383 | abort (); | |
2384 | if (fixP->fx_done) | |
2385 | md_number_to_chars (where, value, 1); | |
2386 | break; | |
2387 | case BFD_RELOC_390_12: | |
2388 | case BFD_RELOC_390_GOT12: | |
2389 | case BFD_RELOC_390_GOTPLT12: | |
2390 | case BFD_RELOC_390_PC12DBL: | |
2391 | case BFD_RELOC_390_PLT12DBL: | |
2392 | if (fixP->fx_pcrel) | |
2393 | value += fixP->fx_pcrel_adjust; | |
2394 | ||
2395 | if (fixP->fx_done) | |
2396 | { | |
2397 | unsigned short mop; | |
2398 | ||
2399 | if (fixP->fx_pcrel) | |
2400 | value >>= 1; | |
2401 | ||
2402 | mop = bfd_getb16 ((unsigned char *) where); | |
2403 | mop |= (unsigned short) (value & 0xfff); | |
2404 | bfd_putb16 ((bfd_vma) mop, (unsigned char *) where); | |
2405 | } | |
2406 | break; | |
2407 | ||
2408 | case BFD_RELOC_390_20: | |
2409 | case BFD_RELOC_390_GOT20: | |
2410 | case BFD_RELOC_390_GOTPLT20: | |
2411 | if (fixP->fx_done) | |
2412 | { | |
2413 | unsigned int mop; | |
2414 | mop = bfd_getb32 ((unsigned char *) where); | |
2415 | mop |= (unsigned int) ((value & 0xfff) << 8 | | |
2416 | (value & 0xff000) >> 12); | |
2417 | bfd_putb32 ((bfd_vma) mop, (unsigned char *) where); | |
2418 | } | |
2419 | break; | |
2420 | ||
2421 | case BFD_RELOC_16: | |
2422 | case BFD_RELOC_GPREL16: | |
2423 | case BFD_RELOC_16_GOT_PCREL: | |
2424 | case BFD_RELOC_16_GOTOFF: | |
2425 | if (fixP->fx_pcrel) | |
2426 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
2427 | _("cannot emit PC relative %s relocation%s%s"), | |
2428 | bfd_get_reloc_code_name (fixP->fx_r_type), | |
2429 | fixP->fx_addsy != NULL ? " against " : "", | |
2430 | (fixP->fx_addsy != NULL | |
2431 | ? S_GET_NAME (fixP->fx_addsy) | |
2432 | : "")); | |
2433 | if (fixP->fx_done) | |
2434 | md_number_to_chars (where, value, 2); | |
2435 | break; | |
2436 | case BFD_RELOC_390_GOT16: | |
2437 | case BFD_RELOC_390_PLTOFF16: | |
2438 | case BFD_RELOC_390_GOTPLT16: | |
2439 | if (fixP->fx_done) | |
2440 | md_number_to_chars (where, value, 2); | |
2441 | break; | |
2442 | case BFD_RELOC_390_PC16DBL: | |
2443 | case BFD_RELOC_390_PLT16DBL: | |
2444 | value += fixP->fx_pcrel_adjust; | |
2445 | if (fixP->fx_done) | |
2446 | md_number_to_chars (where, (offsetT) value >> 1, 2); | |
2447 | break; | |
2448 | ||
2449 | case BFD_RELOC_390_PC24DBL: | |
2450 | case BFD_RELOC_390_PLT24DBL: | |
2451 | value += fixP->fx_pcrel_adjust; | |
2452 | if (fixP->fx_done) | |
2453 | { | |
2454 | unsigned int mop; | |
2455 | value >>= 1; | |
2456 | ||
2457 | mop = bfd_getb32 ((unsigned char *) where - 1); | |
2458 | mop |= (unsigned int) (value & 0xffffff); | |
2459 | bfd_putb32 ((bfd_vma) mop, (unsigned char *) where - 1); | |
2460 | } | |
2461 | break; | |
2462 | ||
2463 | case BFD_RELOC_32: | |
2464 | if (fixP->fx_pcrel) | |
2465 | fixP->fx_r_type = BFD_RELOC_32_PCREL; | |
2466 | else | |
2467 | fixP->fx_r_type = BFD_RELOC_32; | |
2468 | if (fixP->fx_done) | |
2469 | md_number_to_chars (where, value, 4); | |
2470 | break; | |
2471 | case BFD_RELOC_32_PCREL: | |
2472 | case BFD_RELOC_32_BASEREL: | |
2473 | fixP->fx_r_type = BFD_RELOC_32_PCREL; | |
2474 | if (fixP->fx_done) | |
2475 | md_number_to_chars (where, value, 4); | |
2476 | break; | |
2477 | case BFD_RELOC_32_GOT_PCREL: | |
2478 | case BFD_RELOC_390_PLTOFF32: | |
2479 | case BFD_RELOC_390_PLT32: | |
2480 | case BFD_RELOC_390_GOTPLT32: | |
2481 | if (fixP->fx_done) | |
2482 | md_number_to_chars (where, value, 4); | |
2483 | break; | |
2484 | case BFD_RELOC_390_PC32DBL: | |
2485 | case BFD_RELOC_390_PLT32DBL: | |
2486 | case BFD_RELOC_390_GOTPCDBL: | |
2487 | case BFD_RELOC_390_GOTENT: | |
2488 | case BFD_RELOC_390_GOTPLTENT: | |
2489 | value += fixP->fx_pcrel_adjust; | |
2490 | if (fixP->fx_done) | |
2491 | md_number_to_chars (where, (offsetT) value >> 1, 4); | |
2492 | break; | |
2493 | ||
2494 | case BFD_RELOC_32_GOTOFF: | |
2495 | if (fixP->fx_done) | |
2496 | md_number_to_chars (where, value, sizeof (int)); | |
2497 | break; | |
2498 | ||
2499 | case BFD_RELOC_390_GOTOFF64: | |
2500 | if (fixP->fx_done) | |
2501 | md_number_to_chars (where, value, 8); | |
2502 | break; | |
2503 | ||
2504 | case BFD_RELOC_390_GOT64: | |
2505 | case BFD_RELOC_390_PLTOFF64: | |
2506 | case BFD_RELOC_390_PLT64: | |
2507 | case BFD_RELOC_390_GOTPLT64: | |
2508 | if (fixP->fx_done) | |
2509 | md_number_to_chars (where, value, 8); | |
2510 | break; | |
2511 | ||
2512 | case BFD_RELOC_64: | |
2513 | if (fixP->fx_pcrel) | |
2514 | fixP->fx_r_type = BFD_RELOC_64_PCREL; | |
2515 | else | |
2516 | fixP->fx_r_type = BFD_RELOC_64; | |
2517 | if (fixP->fx_done) | |
2518 | md_number_to_chars (where, value, 8); | |
2519 | break; | |
2520 | ||
2521 | case BFD_RELOC_64_PCREL: | |
2522 | fixP->fx_r_type = BFD_RELOC_64_PCREL; | |
2523 | if (fixP->fx_done) | |
2524 | md_number_to_chars (where, value, 8); | |
2525 | break; | |
2526 | ||
2527 | case BFD_RELOC_VTABLE_INHERIT: | |
2528 | case BFD_RELOC_VTABLE_ENTRY: | |
2529 | fixP->fx_done = 0; | |
2530 | return; | |
2531 | ||
2532 | case BFD_RELOC_390_TLS_LOAD: | |
2533 | case BFD_RELOC_390_TLS_GDCALL: | |
2534 | case BFD_RELOC_390_TLS_LDCALL: | |
2535 | case BFD_RELOC_390_TLS_GD32: | |
2536 | case BFD_RELOC_390_TLS_GD64: | |
2537 | case BFD_RELOC_390_TLS_GOTIE12: | |
2538 | case BFD_RELOC_390_TLS_GOTIE20: | |
2539 | case BFD_RELOC_390_TLS_GOTIE32: | |
2540 | case BFD_RELOC_390_TLS_GOTIE64: | |
2541 | case BFD_RELOC_390_TLS_LDM32: | |
2542 | case BFD_RELOC_390_TLS_LDM64: | |
2543 | case BFD_RELOC_390_TLS_IE32: | |
2544 | case BFD_RELOC_390_TLS_IE64: | |
2545 | case BFD_RELOC_390_TLS_LE32: | |
2546 | case BFD_RELOC_390_TLS_LE64: | |
2547 | case BFD_RELOC_390_TLS_LDO32: | |
2548 | case BFD_RELOC_390_TLS_LDO64: | |
2549 | case BFD_RELOC_390_TLS_DTPMOD: | |
2550 | case BFD_RELOC_390_TLS_DTPOFF: | |
2551 | case BFD_RELOC_390_TLS_TPOFF: | |
2552 | S_SET_THREAD_LOCAL (fixP->fx_addsy); | |
2553 | /* Fully resolved at link time. */ | |
2554 | break; | |
2555 | case BFD_RELOC_390_TLS_IEENT: | |
2556 | /* Fully resolved at link time. */ | |
2557 | S_SET_THREAD_LOCAL (fixP->fx_addsy); | |
2558 | value += 2; | |
2559 | break; | |
2560 | ||
2561 | default: | |
2562 | { | |
2563 | const char *reloc_name = bfd_get_reloc_code_name (fixP->fx_r_type); | |
2564 | ||
2565 | if (reloc_name != NULL) | |
2566 | as_fatal (_("Gas failure, reloc type %s\n"), reloc_name); | |
2567 | else | |
2568 | as_fatal (_("Gas failure, reloc type #%i\n"), fixP->fx_r_type); | |
2569 | } | |
2570 | } | |
2571 | ||
2572 | fixP->fx_offset = value; | |
2573 | } | |
2574 | } | |
2575 | ||
2576 | /* Generate a reloc for a fixup. */ | |
2577 | ||
2578 | arelent * | |
2579 | tc_gen_reloc (asection *seg ATTRIBUTE_UNUSED, fixS *fixp) | |
2580 | { | |
2581 | bfd_reloc_code_real_type code; | |
2582 | arelent *reloc; | |
2583 | ||
2584 | code = fixp->fx_r_type; | |
2585 | if (GOT_symbol && fixp->fx_addsy == GOT_symbol) | |
2586 | { | |
2587 | if ( (s390_arch_size == 32 && code == BFD_RELOC_32_PCREL) | |
2588 | || (s390_arch_size == 64 && code == BFD_RELOC_64_PCREL)) | |
2589 | code = BFD_RELOC_390_GOTPC; | |
2590 | if (code == BFD_RELOC_390_PC32DBL) | |
2591 | code = BFD_RELOC_390_GOTPCDBL; | |
2592 | } | |
2593 | ||
2594 | reloc = XNEW (arelent); | |
2595 | reloc->sym_ptr_ptr = XNEW (asymbol *); | |
2596 | *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy); | |
2597 | reloc->address = fixp->fx_frag->fr_address + fixp->fx_where; | |
2598 | reloc->howto = bfd_reloc_type_lookup (stdoutput, code); | |
2599 | if (reloc->howto == NULL) | |
2600 | { | |
2601 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
2602 | _("cannot represent relocation type %s"), | |
2603 | bfd_get_reloc_code_name (code)); | |
2604 | /* Set howto to a garbage value so that we can keep going. */ | |
2605 | reloc->howto = bfd_reloc_type_lookup (stdoutput, BFD_RELOC_32); | |
2606 | gas_assert (reloc->howto != NULL); | |
2607 | } | |
2608 | reloc->addend = fixp->fx_offset; | |
2609 | ||
2610 | return reloc; | |
2611 | } | |
2612 | ||
2613 | void | |
2614 | s390_cfi_frame_initial_instructions (void) | |
2615 | { | |
2616 | cfi_add_CFA_def_cfa (15, s390_arch_size == 64 ? 160 : 96); | |
2617 | } | |
2618 | ||
2619 | int | |
2620 | tc_s390_regname_to_dw2regnum (char *regname) | |
2621 | { | |
2622 | int regnum = -1; | |
2623 | ||
2624 | if (regname[0] != 'c' && regname[0] != 'a') | |
2625 | { | |
2626 | regnum = reg_name_search (regname); | |
2627 | if (regname[0] == 'f' && regnum != -1) | |
2628 | regnum += 16; | |
2629 | } | |
2630 | else if (strcmp (regname, "ap") == 0) | |
2631 | regnum = 32; | |
2632 | else if (strcmp (regname, "cc") == 0) | |
2633 | regnum = 33; | |
2634 | return regnum; | |
2635 | } | |
2636 | ||
2637 | void | |
2638 | s390_elf_final_processing (void) | |
2639 | { | |
2640 | if (set_highgprs_p) | |
2641 | elf_elfheader (stdoutput)->e_flags |= EF_S390_HIGH_GPRS; | |
2642 | } |