Commit | Line | Data |
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a85d7ed0 | 1 | /* tc-s390.c -- Assemble for the S390 |
302576af | 2 | Copyright 2000, 2001, 2002 Free Software Foundation, Inc. |
a85d7ed0 NC |
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 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 the Free | |
19 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA | |
20 | 02111-1307, USA. */ | |
21 | ||
22 | #include <stdio.h> | |
a85d7ed0 | 23 | #include "as.h" |
3882b010 | 24 | #include "safe-ctype.h" |
a85d7ed0 NC |
25 | #include "subsegs.h" |
26 | #include "struc-symbol.h" | |
27 | ||
28 | #include "opcode/s390.h" | |
29 | #include "elf/s390.h" | |
30 | ||
16a419ba | 31 | /* The default architecture. */ |
a85d7ed0 NC |
32 | #ifndef DEFAULT_ARCH |
33 | #define DEFAULT_ARCH "s390" | |
34 | #endif | |
35 | static char *default_arch = DEFAULT_ARCH; | |
36 | /* Either 32 or 64, selects file format. */ | |
37 | static int s390_arch_size; | |
16a419ba | 38 | /* Current architecture. Start with the smallest instruction set. */ |
a85d7ed0 NC |
39 | static enum s390_opcode_arch_val current_architecture = S390_OPCODE_ESA; |
40 | static int current_arch_mask = 1 << S390_OPCODE_ESA; | |
41 | static int current_arch_requested = 0; | |
42 | ||
16a419ba | 43 | /* Whether to use user friendly register names. Default is true. */ |
a85d7ed0 NC |
44 | #ifndef TARGET_REG_NAMES_P |
45 | #define TARGET_REG_NAMES_P true | |
46 | #endif | |
47 | ||
48 | static boolean reg_names_p = TARGET_REG_NAMES_P; | |
49 | ||
16a419ba NC |
50 | /* Set to TRUE if we want to warn about zero base/index registers. */ |
51 | static boolean warn_areg_zero = FALSE; | |
52 | ||
a85d7ed0 NC |
53 | /* Generic assembler global variables which must be defined by all |
54 | targets. */ | |
55 | ||
56 | const char comment_chars[] = "#"; | |
57 | ||
58 | /* Characters which start a comment at the beginning of a line. */ | |
59 | const char line_comment_chars[] = "#"; | |
60 | ||
61 | /* Characters which may be used to separate multiple commands on a | |
62 | single line. */ | |
63 | const char line_separator_chars[] = ";"; | |
64 | ||
65 | /* Characters which are used to indicate an exponent in a floating | |
66 | point number. */ | |
67 | const char EXP_CHARS[] = "eE"; | |
68 | ||
69 | /* Characters which mean that a number is a floating point constant, | |
70 | as in 0d1.0. */ | |
71 | const char FLT_CHARS[] = "dD"; | |
72 | ||
73 | /* The target specific pseudo-ops which we support. */ | |
74 | ||
75 | /* Define the prototypes for the pseudo-ops */ | |
76 | static void s390_byte PARAMS ((int)); | |
77 | static void s390_elf_cons PARAMS ((int)); | |
78 | static void s390_bss PARAMS ((int)); | |
79 | static void s390_insn PARAMS ((int)); | |
80 | static void s390_literals PARAMS ((int)); | |
81 | ||
82 | const pseudo_typeS md_pseudo_table[] = | |
83 | { | |
84 | { "align", s_align_bytes, 0 }, | |
85 | /* Pseudo-ops which must be defined. */ | |
198ce79b | 86 | { "bss", s390_bss, 0 }, |
a85d7ed0 NC |
87 | { "insn", s390_insn, 0 }, |
88 | /* Pseudo-ops which must be overridden. */ | |
89 | { "byte", s390_byte, 0 }, | |
90 | { "short", s390_elf_cons, 2 }, | |
91 | { "long", s390_elf_cons, 4 }, | |
92 | { "quad", s390_elf_cons, 8 }, | |
93 | { "ltorg", s390_literals, 0 }, | |
94 | { "string", stringer, 2 }, | |
95 | { NULL, NULL, 0 } | |
96 | }; | |
97 | ||
98 | ||
99 | /* Structure to hold information about predefined registers. */ | |
100 | struct pd_reg | |
101 | { | |
102 | char *name; | |
103 | int value; | |
104 | }; | |
105 | ||
106 | /* List of registers that are pre-defined: | |
107 | ||
108 | Each access register has a predefined name of the form: | |
109 | a<reg_num> which has the value <reg_num>. | |
110 | ||
111 | Each control register has a predefined name of the form: | |
112 | c<reg_num> which has the value <reg_num>. | |
113 | ||
114 | Each general register has a predefined name of the form: | |
115 | r<reg_num> which has the value <reg_num>. | |
116 | ||
117 | Each floating point register a has predefined name of the form: | |
118 | f<reg_num> which has the value <reg_num>. | |
119 | ||
120 | There are individual registers as well: | |
121 | sp has the value 15 | |
122 | lit has the value 12 | |
123 | ||
124 | The table is sorted. Suitable for searching by a binary search. */ | |
125 | ||
126 | static const struct pd_reg pre_defined_registers[] = | |
127 | { | |
128 | { "a0", 0 }, /* Access registers */ | |
129 | { "a1", 1 }, | |
130 | { "a10", 10 }, | |
131 | { "a11", 11 }, | |
132 | { "a12", 12 }, | |
133 | { "a13", 13 }, | |
134 | { "a14", 14 }, | |
135 | { "a15", 15 }, | |
136 | { "a2", 2 }, | |
137 | { "a3", 3 }, | |
138 | { "a4", 4 }, | |
139 | { "a5", 5 }, | |
140 | { "a6", 6 }, | |
141 | { "a7", 7 }, | |
142 | { "a8", 8 }, | |
143 | { "a9", 9 }, | |
144 | ||
145 | { "c0", 0 }, /* Control registers */ | |
146 | { "c1", 1 }, | |
147 | { "c10", 10 }, | |
148 | { "c11", 11 }, | |
149 | { "c12", 12 }, | |
150 | { "c13", 13 }, | |
151 | { "c14", 14 }, | |
152 | { "c15", 15 }, | |
153 | { "c2", 2 }, | |
154 | { "c3", 3 }, | |
155 | { "c4", 4 }, | |
156 | { "c5", 5 }, | |
157 | { "c6", 6 }, | |
158 | { "c7", 7 }, | |
159 | { "c8", 8 }, | |
160 | { "c9", 9 }, | |
161 | ||
162 | { "f0", 0 }, /* Floating point registers */ | |
198ce79b AJ |
163 | { "f1", 1 }, |
164 | { "f10", 10 }, | |
165 | { "f11", 11 }, | |
166 | { "f12", 12 }, | |
167 | { "f13", 13 }, | |
168 | { "f14", 14 }, | |
169 | { "f15", 15 }, | |
170 | { "f2", 2 }, | |
171 | { "f3", 3 }, | |
172 | { "f4", 4 }, | |
173 | { "f5", 5 }, | |
174 | { "f6", 6 }, | |
175 | { "f7", 7 }, | |
176 | { "f8", 8 }, | |
177 | { "f9", 9 }, | |
a85d7ed0 NC |
178 | |
179 | { "lit", 13 }, /* Pointer to literal pool */ | |
180 | ||
181 | { "r0", 0 }, /* General purpose registers */ | |
182 | { "r1", 1 }, | |
183 | { "r10", 10 }, | |
184 | { "r11", 11 }, | |
185 | { "r12", 12 }, | |
186 | { "r13", 13 }, | |
187 | { "r14", 14 }, | |
188 | { "r15", 15 }, | |
189 | { "r2", 2 }, | |
190 | { "r3", 3 }, | |
191 | { "r4", 4 }, | |
192 | { "r5", 5 }, | |
193 | { "r6", 6 }, | |
194 | { "r7", 7 }, | |
195 | { "r8", 8 }, | |
196 | { "r9", 9 }, | |
197 | ||
198 | { "sp", 15 }, /* Stack pointer */ | |
199 | ||
200 | }; | |
201 | ||
07726851 | 202 | #define REG_NAME_CNT (sizeof (pre_defined_registers) / sizeof (struct pd_reg)) |
a85d7ed0 | 203 | |
9d654c1c AJ |
204 | static int reg_name_search |
205 | PARAMS ((const struct pd_reg *, int, const char *)); | |
206 | static boolean register_name PARAMS ((expressionS *)); | |
207 | static void init_default_arch PARAMS ((void)); | |
208 | static void s390_insert_operand | |
209 | PARAMS ((unsigned char *, const struct s390_operand *, offsetT, char *, | |
210 | unsigned int)); | |
211 | static char *md_gather_operands | |
212 | PARAMS ((char *, unsigned char *, const struct s390_opcode *)); | |
213 | ||
a85d7ed0 NC |
214 | /* Given NAME, find the register number associated with that name, return |
215 | the integer value associated with the given name or -1 on failure. */ | |
216 | ||
217 | static int | |
218 | reg_name_search (regs, regcount, name) | |
219 | const struct pd_reg *regs; | |
220 | int regcount; | |
221 | const char *name; | |
222 | { | |
223 | int middle, low, high; | |
224 | int cmp; | |
225 | ||
226 | low = 0; | |
227 | high = regcount - 1; | |
228 | ||
229 | do | |
230 | { | |
231 | middle = (low + high) / 2; | |
232 | cmp = strcasecmp (name, regs[middle].name); | |
233 | if (cmp < 0) | |
234 | high = middle - 1; | |
235 | else if (cmp > 0) | |
236 | low = middle + 1; | |
237 | else | |
238 | return regs[middle].value; | |
239 | } | |
240 | while (low <= high); | |
241 | ||
242 | return -1; | |
243 | } | |
244 | ||
245 | ||
246 | /* | |
247 | * Summary of register_name(). | |
248 | * | |
249 | * in: Input_line_pointer points to 1st char of operand. | |
250 | * | |
251 | * out: A expressionS. | |
252 | * The operand may have been a register: in this case, X_op == O_register, | |
253 | * X_add_number is set to the register number, and truth is returned. | |
254 | * Input_line_pointer->(next non-blank) char after operand, or is in its | |
255 | * original state. | |
256 | */ | |
257 | ||
258 | static boolean | |
259 | register_name (expressionP) | |
260 | expressionS *expressionP; | |
261 | { | |
262 | int reg_number; | |
263 | char *name; | |
264 | char *start; | |
265 | char c; | |
266 | ||
468cced8 | 267 | /* Find the spelling of the operand. */ |
a85d7ed0 | 268 | start = name = input_line_pointer; |
3882b010 | 269 | if (name[0] == '%' && ISALPHA (name[1])) |
a85d7ed0 NC |
270 | name = ++input_line_pointer; |
271 | else | |
272 | return false; | |
273 | ||
274 | c = get_symbol_end (); | |
275 | reg_number = reg_name_search (pre_defined_registers, REG_NAME_CNT, name); | |
276 | ||
468cced8 AM |
277 | /* Put back the delimiting char. */ |
278 | *input_line_pointer = c; | |
279 | ||
280 | /* Look to see if it's in the register table. */ | |
198ce79b | 281 | if (reg_number >= 0) |
a85d7ed0 NC |
282 | { |
283 | expressionP->X_op = O_register; | |
284 | expressionP->X_add_number = reg_number; | |
198ce79b | 285 | |
468cced8 | 286 | /* Make the rest nice. */ |
a85d7ed0 NC |
287 | expressionP->X_add_symbol = NULL; |
288 | expressionP->X_op_symbol = NULL; | |
a85d7ed0 NC |
289 | return true; |
290 | } | |
468cced8 AM |
291 | |
292 | /* Reset the line as if we had not done anything. */ | |
293 | input_line_pointer = start; | |
294 | return false; | |
a85d7ed0 NC |
295 | } |
296 | ||
297 | /* Local variables. */ | |
298 | ||
299 | /* Opformat hash table. */ | |
300 | static struct hash_control *s390_opformat_hash; | |
301 | ||
302 | /* Opcode hash table. */ | |
303 | static struct hash_control *s390_opcode_hash; | |
304 | ||
305 | /* Flags to set in the elf header */ | |
306 | static flagword s390_flags = 0; | |
307 | ||
308 | symbolS *GOT_symbol; /* Pre-defined "_GLOBAL_OFFSET_TABLE_" */ | |
309 | ||
310 | #ifndef WORKING_DOT_WORD | |
311 | const int md_short_jump_size = 4; | |
312 | const int md_long_jump_size = 4; | |
313 | #endif | |
314 | ||
315 | CONST char *md_shortopts = "A:m:kVQ:"; | |
316 | struct option md_longopts[] = { | |
317 | {NULL, no_argument, NULL, 0} | |
318 | }; | |
07726851 | 319 | size_t md_longopts_size = sizeof (md_longopts); |
a85d7ed0 NC |
320 | |
321 | /* Initialize the default opcode arch and word size from the default | |
322 | architecture name. */ | |
323 | static void | |
324 | init_default_arch () | |
325 | { | |
326 | if (current_arch_requested) | |
327 | return; | |
07855bec | 328 | |
07726851 | 329 | if (strcmp (default_arch, "s390") == 0) |
07855bec NC |
330 | { |
331 | s390_arch_size = 32; | |
332 | current_architecture = S390_OPCODE_ESA; | |
333 | } | |
07726851 | 334 | else if (strcmp (default_arch, "s390x") == 0) |
07855bec NC |
335 | { |
336 | s390_arch_size = 64; | |
337 | current_architecture = S390_OPCODE_ESAME; | |
338 | } | |
339 | else | |
a85d7ed0 NC |
340 | as_fatal ("Invalid default architecture, broken assembler."); |
341 | current_arch_mask = 1 << current_architecture; | |
342 | } | |
343 | ||
344 | /* Called by TARGET_FORMAT. */ | |
345 | const char * | |
346 | s390_target_format () | |
347 | { | |
348 | /* We don't get a chance to initialize anything before we're called, | |
349 | so handle that now. */ | |
350 | if (! s390_arch_size) | |
351 | init_default_arch (); | |
352 | ||
353 | return s390_arch_size == 64 ? "elf64-s390" : "elf32-s390"; | |
354 | } | |
355 | ||
356 | int | |
357 | md_parse_option (c, arg) | |
358 | int c; | |
359 | char *arg; | |
360 | { | |
07855bec NC |
361 | switch (c) |
362 | { | |
363 | /* -k: Ignore for FreeBSD compatibility. */ | |
364 | case 'k': | |
365 | break; | |
366 | case 'm': | |
367 | if (arg != NULL && strcmp (arg, "regnames") == 0) | |
368 | reg_names_p = true; | |
198ce79b | 369 | |
07855bec NC |
370 | else if (arg != NULL && strcmp (arg, "no-regnames") == 0) |
371 | reg_names_p = false; | |
198ce79b | 372 | |
16a419ba NC |
373 | else if (arg != NULL && strcmp (arg, "warn-areg-zero") == 0) |
374 | warn_areg_zero = TRUE; | |
375 | ||
ff0fb565 MS |
376 | else if (arg != NULL && strcmp (arg, "31") == 0) |
377 | s390_arch_size = 31; | |
378 | ||
379 | else if (arg != NULL && strcmp (arg, "64") == 0) | |
380 | s390_arch_size = 64; | |
381 | ||
07855bec NC |
382 | else |
383 | { | |
384 | as_bad (_("invalid switch -m%s"), arg); | |
385 | return 0; | |
386 | } | |
387 | break; | |
198ce79b | 388 | |
07855bec NC |
389 | case 'A': |
390 | if (arg != NULL && strcmp (arg, "esa") == 0) | |
819e6420 | 391 | current_architecture = S390_OPCODE_ESA; |
07855bec | 392 | else if (arg != NULL && strcmp (arg, "esame") == 0) |
819e6420 | 393 | current_architecture = S390_OPCODE_ESAME; |
07855bec NC |
394 | else |
395 | as_bad ("invalid architecture -A%s", arg); | |
396 | current_arch_mask = 1 << current_architecture; | |
397 | current_arch_requested = 1; | |
398 | break; | |
399 | ||
400 | /* -V: SVR4 argument to print version ID. */ | |
401 | case 'V': | |
402 | print_version_id (); | |
403 | break; | |
198ce79b | 404 | |
07855bec NC |
405 | /* -Qy, -Qn: SVR4 arguments controlling whether a .comment section |
406 | should be emitted or not. FIXME: Not implemented. */ | |
407 | case 'Q': | |
408 | break; | |
198ce79b | 409 | |
07855bec NC |
410 | default: |
411 | return 0; | |
412 | } | |
198ce79b | 413 | |
a85d7ed0 NC |
414 | return 1; |
415 | } | |
416 | ||
417 | void | |
418 | md_show_usage (stream) | |
419 | FILE *stream; | |
420 | { | |
07855bec | 421 | fprintf (stream, _("\ |
16a419ba NC |
422 | S390 options:\n\ |
423 | -mregnames Allow symbolic names for registers\n\ | |
424 | -mwarn-areg-zero Warn about zero base/index registers\n\ | |
ff0fb565 MS |
425 | -mno-regnames Do not allow symbolic names for registers\n\ |
426 | -m31 Set file format to 31 bit format\n\ | |
427 | -m64 Set file format to 64 bit format\n")); | |
07855bec | 428 | fprintf (stream, _("\ |
16a419ba NC |
429 | -V print assembler version number\n\ |
430 | -Qy, -Qn ignored\n")); | |
a85d7ed0 NC |
431 | } |
432 | ||
433 | /* This function is called when the assembler starts up. It is called | |
434 | after the options have been parsed and the output file has been | |
16a419ba | 435 | opened. */ |
a85d7ed0 NC |
436 | |
437 | void | |
438 | md_begin () | |
439 | { | |
440 | register const struct s390_opcode *op; | |
441 | const struct s390_opcode *op_end; | |
442 | boolean dup_insn = false; | |
443 | const char *retval; | |
444 | ||
ff0fb565 MS |
445 | /* Give a warning if the combination -m64-bit and -Aesa is used. */ |
446 | if (s390_arch_size == 64 && current_arch_mask == (1 << S390_OPCODE_ESA)) | |
447 | as_warn ("The 64 bit file format is used without esame instructions."); | |
448 | ||
16a419ba | 449 | /* Set the ELF flags if desired. */ |
a85d7ed0 NC |
450 | if (s390_flags) |
451 | bfd_set_private_flags (stdoutput, s390_flags); | |
452 | ||
453 | /* Insert the opcode formats into a hash table. */ | |
454 | s390_opformat_hash = hash_new (); | |
455 | ||
456 | op_end = s390_opformats + s390_num_opformats; | |
07855bec NC |
457 | for (op = s390_opformats; op < op_end; op++) |
458 | { | |
459 | retval = hash_insert (s390_opformat_hash, op->name, (PTR) op); | |
460 | if (retval != (const char *) NULL) | |
461 | { | |
462 | as_bad (_("Internal assembler error for instruction format %s"), | |
463 | op->name); | |
464 | dup_insn = true; | |
465 | } | |
466 | } | |
a85d7ed0 NC |
467 | |
468 | /* Insert the opcodes into a hash table. */ | |
469 | s390_opcode_hash = hash_new (); | |
470 | ||
471 | op_end = s390_opcodes + s390_num_opcodes; | |
07855bec NC |
472 | for (op = s390_opcodes; op < op_end; op++) |
473 | { | |
474 | retval = hash_insert (s390_opcode_hash, op->name, (PTR) op); | |
475 | if (retval != (const char *) NULL) | |
476 | { | |
477 | as_bad (_("Internal assembler error for instruction %s"), op->name); | |
478 | dup_insn = true; | |
479 | } | |
480 | } | |
481 | ||
a85d7ed0 NC |
482 | if (dup_insn) |
483 | abort (); | |
484 | ||
485 | record_alignment (text_section, 2); | |
486 | record_alignment (data_section, 2); | |
487 | record_alignment (bss_section, 2); | |
488 | ||
489 | } | |
490 | ||
491 | /* Called after all assembly has been done. */ | |
492 | void | |
493 | s390_md_end () | |
494 | { | |
07855bec | 495 | if (s390_arch_size == 64) |
ff0fb565 | 496 | bfd_set_arch_mach (stdoutput, bfd_arch_s390, bfd_mach_s390_64); |
07855bec | 497 | else |
ff0fb565 | 498 | bfd_set_arch_mach (stdoutput, bfd_arch_s390, bfd_mach_s390_31); |
a85d7ed0 NC |
499 | } |
500 | ||
501 | void | |
502 | s390_align_code (fragP, count) | |
503 | fragS *fragP; | |
504 | int count; | |
505 | { | |
506 | /* We use nop pattern 0x0707. */ | |
07855bec NC |
507 | if (count > 0) |
508 | { | |
07726851 | 509 | memset (fragP->fr_literal + fragP->fr_fix, 0x07, count); |
07855bec NC |
510 | fragP->fr_var = count; |
511 | } | |
a85d7ed0 NC |
512 | } |
513 | ||
514 | /* Insert an operand value into an instruction. */ | |
515 | ||
516 | static void | |
517 | s390_insert_operand (insn, operand, val, file, line) | |
518 | unsigned char *insn; | |
519 | const struct s390_operand *operand; | |
520 | offsetT val; | |
521 | char *file; | |
522 | unsigned int line; | |
523 | { | |
524 | addressT uval; | |
525 | int offset; | |
526 | ||
07855bec NC |
527 | if (operand->flags & (S390_OPERAND_SIGNED|S390_OPERAND_PCREL)) |
528 | { | |
529 | offsetT min, max; | |
530 | ||
531 | max = ((offsetT) 1 << (operand->bits - 1)) - 1; | |
532 | min = - ((offsetT) 1 << (operand->bits - 1)); | |
533 | /* Halve PCREL operands. */ | |
534 | if (operand->flags & S390_OPERAND_PCREL) | |
535 | val >>= 1; | |
536 | /* Check for underflow / overflow. */ | |
537 | if (val < min || val > max) | |
538 | { | |
539 | const char *err = | |
540 | "operand out of range (%s not between %ld and %ld)"; | |
541 | char buf[100]; | |
542 | ||
543 | if (operand->flags & S390_OPERAND_PCREL) | |
544 | { | |
545 | val <<= 1; | |
546 | min <<= 1; | |
547 | max <<= 1; | |
548 | } | |
549 | sprint_value (buf, val); | |
550 | if (file == (char *) NULL) | |
551 | as_bad (err, buf, (int) min, (int) max); | |
552 | else | |
553 | as_bad_where (file, line, err, buf, (int) min, (int) max); | |
554 | return; | |
555 | } | |
556 | /* val is ok, now restrict it to operand->bits bits. */ | |
557 | uval = (addressT) val & ((((addressT) 1 << (operand->bits-1)) << 1) - 1); | |
a85d7ed0 | 558 | } |
07855bec NC |
559 | else |
560 | { | |
561 | addressT min, max; | |
198ce79b | 562 | |
07855bec NC |
563 | max = (((addressT) 1 << (operand->bits - 1))<<1) - 1; |
564 | min = (offsetT) 0; | |
565 | uval = (addressT) val; | |
566 | /* Length x in an instructions has real length x+1. */ | |
567 | if (operand->flags & S390_OPERAND_LENGTH) | |
568 | uval--; | |
569 | /* Check for underflow / overflow. */ | |
570 | if (uval < min || uval > max) | |
571 | { | |
572 | const char *err = | |
573 | "operand out of range (%s not between %ld and %ld)"; | |
574 | char buf[100]; | |
198ce79b | 575 | |
07855bec NC |
576 | if (operand->flags & S390_OPERAND_LENGTH) |
577 | { | |
578 | uval++; | |
579 | min++; | |
580 | max++; | |
581 | } | |
582 | sprint_value (buf, uval); | |
583 | if (file == (char *) NULL) | |
584 | as_bad (err, buf, (int) min, (int) max); | |
585 | else | |
586 | as_bad_where (file, line, err, buf, (int) min, (int) max); | |
587 | return; | |
588 | } | |
a85d7ed0 | 589 | } |
a85d7ed0 NC |
590 | |
591 | /* Insert fragments of the operand byte for byte. */ | |
592 | offset = operand->shift + operand->bits; | |
593 | uval <<= (-offset) & 7; | |
594 | insn += (offset - 1)/8; | |
07855bec NC |
595 | while (uval != 0) |
596 | { | |
597 | *insn-- |= uval; | |
598 | uval >>= 8; | |
599 | } | |
a85d7ed0 NC |
600 | } |
601 | ||
602 | /* Structure used to hold suffixes. */ | |
07855bec NC |
603 | typedef enum |
604 | { | |
605 | ELF_SUFFIX_NONE = 0, | |
606 | ELF_SUFFIX_GOT, | |
607 | ELF_SUFFIX_PLT, | |
608 | ELF_SUFFIX_GOTENT | |
609 | } | |
610 | elf_suffix_type; | |
611 | ||
612 | struct map_bfd | |
613 | { | |
614 | char *string; | |
615 | int length; | |
616 | elf_suffix_type suffix; | |
617 | }; | |
a85d7ed0 | 618 | |
9d654c1c AJ |
619 | static elf_suffix_type s390_elf_suffix PARAMS ((char **, expressionS *)); |
620 | static int s390_exp_compare PARAMS ((expressionS *exp1, expressionS *exp2)); | |
621 | static elf_suffix_type s390_lit_suffix | |
622 | PARAMS ((char **, expressionS *, elf_suffix_type)); | |
623 | ||
624 | ||
a85d7ed0 NC |
625 | /* Parse @got/@plt/@gotoff. and return the desired relocation. */ |
626 | static elf_suffix_type | |
627 | s390_elf_suffix (str_p, exp_p) | |
628 | char **str_p; | |
629 | expressionS *exp_p; | |
630 | { | |
07855bec NC |
631 | static struct map_bfd mapping[] = |
632 | { | |
a85d7ed0 NC |
633 | { "got", 3, ELF_SUFFIX_GOT }, |
634 | { "got12", 5, ELF_SUFFIX_GOT }, | |
635 | { "plt", 3, ELF_SUFFIX_PLT }, | |
636 | { "gotent", 6, ELF_SUFFIX_GOTENT }, | |
637 | { NULL, 0, ELF_SUFFIX_NONE } | |
638 | }; | |
639 | ||
640 | struct map_bfd *ptr; | |
641 | char *str = *str_p; | |
642 | char *ident; | |
643 | int len; | |
644 | ||
645 | if (*str++ != '@') | |
646 | return ELF_SUFFIX_NONE; | |
647 | ||
648 | ident = str; | |
3882b010 | 649 | while (ISALNUM (*str)) |
a85d7ed0 NC |
650 | str++; |
651 | len = str - ident; | |
652 | ||
653 | for (ptr = &mapping[0]; ptr->length > 0; ptr++) | |
16a419ba NC |
654 | if (len == ptr->length |
655 | && strncasecmp (ident, ptr->string, ptr->length) == 0) | |
07855bec NC |
656 | { |
657 | if (exp_p->X_add_number != 0) | |
658 | as_warn (_("identifier+constant@%s means identifier@%s+constant"), | |
659 | ptr->string, ptr->string); | |
660 | /* Now check for identifier@suffix+constant. */ | |
661 | if (*str == '-' || *str == '+') | |
662 | { | |
663 | char *orig_line = input_line_pointer; | |
664 | expressionS new_exp; | |
665 | ||
666 | input_line_pointer = str; | |
667 | expression (&new_exp); | |
668 | ||
669 | switch (new_exp.X_op) | |
670 | { | |
671 | case O_constant: /* X_add_number (a constant expression). */ | |
672 | exp_p->X_add_number += new_exp.X_add_number; | |
673 | str = input_line_pointer; | |
674 | break; | |
675 | case O_symbol: /* X_add_symbol + X_add_number. */ | |
676 | /* this case is used for e.g. xyz@PLT+.Label. */ | |
677 | exp_p->X_add_number += new_exp.X_add_number; | |
678 | exp_p->X_op_symbol = new_exp.X_add_symbol; | |
679 | exp_p->X_op = O_add; | |
680 | str = input_line_pointer; | |
681 | break; | |
682 | case O_uminus: /* (- X_add_symbol) + X_add_number. */ | |
683 | /* this case is used for e.g. xyz@PLT-.Label. */ | |
684 | exp_p->X_add_number += new_exp.X_add_number; | |
685 | exp_p->X_op_symbol = new_exp.X_add_symbol; | |
686 | exp_p->X_op = O_subtract; | |
687 | str = input_line_pointer; | |
688 | break; | |
689 | default: | |
690 | break; | |
691 | } | |
692 | ||
693 | /* If s390_elf_suffix has not been called with | |
694 | &input_line_pointer as first parameter, we have | |
695 | clobbered the input_line_pointer. We have to | |
696 | undo that. */ | |
697 | if (&input_line_pointer != str_p) | |
698 | input_line_pointer = orig_line; | |
a85d7ed0 | 699 | } |
07855bec NC |
700 | *str_p = str; |
701 | return ptr->suffix; | |
a85d7ed0 | 702 | } |
a85d7ed0 NC |
703 | |
704 | return BFD_RELOC_UNUSED; | |
705 | } | |
706 | ||
707 | /* Structure used to hold a literal pool entry. */ | |
07855bec NC |
708 | struct s390_lpe |
709 | { | |
710 | struct s390_lpe *next; | |
711 | expressionS ex; | |
712 | FLONUM_TYPE floatnum; /* used if X_op == O_big && X_add_number <= 0 */ | |
713 | LITTLENUM_TYPE bignum[4]; /* used if X_op == O_big && X_add_number > 0 */ | |
714 | int nbytes; | |
715 | bfd_reloc_code_real_type reloc; | |
716 | symbolS *sym; | |
717 | }; | |
a85d7ed0 NC |
718 | |
719 | static struct s390_lpe *lpe_free_list = NULL; | |
720 | static struct s390_lpe *lpe_list = NULL; | |
721 | static struct s390_lpe *lpe_list_tail = NULL; | |
722 | static symbolS *lp_sym = NULL; | |
723 | static int lp_count = 0; | |
724 | static int lpe_count = 0; | |
725 | ||
726 | static int | |
727 | s390_exp_compare(exp1, exp2) | |
728 | expressionS *exp1; | |
729 | expressionS *exp2; | |
730 | { | |
731 | if (exp1->X_op != exp2->X_op) | |
732 | return 0; | |
733 | ||
07855bec NC |
734 | switch (exp1->X_op) |
735 | { | |
736 | case O_constant: /* X_add_number must be equal. */ | |
737 | case O_register: | |
738 | return exp1->X_add_number == exp2->X_add_number; | |
739 | ||
740 | case O_big: | |
198ce79b | 741 | as_bad (_("Can't handle O_big in s390_exp_compare")); |
07855bec NC |
742 | |
743 | case O_symbol: /* X_add_symbol & X_add_number must be equal. */ | |
744 | case O_symbol_rva: | |
745 | case O_uminus: | |
746 | case O_bit_not: | |
747 | case O_logical_not: | |
16a419ba NC |
748 | return (exp1->X_add_symbol == exp2->X_add_symbol) |
749 | && (exp1->X_add_number == exp2->X_add_number); | |
07855bec NC |
750 | |
751 | case O_multiply: /* X_add_symbol,X_op_symbol&X_add_number must be equal. */ | |
752 | case O_divide: | |
753 | case O_modulus: | |
754 | case O_left_shift: | |
755 | case O_right_shift: | |
756 | case O_bit_inclusive_or: | |
757 | case O_bit_or_not: | |
758 | case O_bit_exclusive_or: | |
759 | case O_bit_and: | |
760 | case O_add: | |
761 | case O_subtract: | |
762 | case O_eq: | |
763 | case O_ne: | |
764 | case O_lt: | |
765 | case O_le: | |
766 | case O_ge: | |
767 | case O_gt: | |
768 | case O_logical_and: | |
769 | case O_logical_or: | |
16a419ba NC |
770 | return (exp1->X_add_symbol == exp2->X_add_symbol) |
771 | && (exp1->X_op_symbol == exp2->X_op_symbol) | |
772 | && (exp1->X_add_number == exp2->X_add_number); | |
07855bec | 773 | default: |
a85d7ed0 NC |
774 | return 0; |
775 | } | |
776 | } | |
777 | ||
778 | /* Test for @lit and if its present make an entry in the literal pool and | |
779 | modify the current expression to be an offset into the literal pool. */ | |
780 | static elf_suffix_type | |
781 | s390_lit_suffix (str_p, exp_p, suffix) | |
782 | char **str_p; | |
783 | expressionS *exp_p; | |
784 | elf_suffix_type suffix; | |
785 | { | |
786 | bfd_reloc_code_real_type reloc; | |
787 | char tmp_name[64]; | |
788 | char *str = *str_p; | |
789 | char *ident; | |
790 | struct s390_lpe *lpe; | |
791 | int nbytes, len; | |
792 | ||
793 | if (*str++ != ':') | |
794 | return suffix; /* No modification. */ | |
198ce79b | 795 | |
a85d7ed0 NC |
796 | /* We look for a suffix of the form "@lit1", "@lit2", "@lit4" or "@lit8". */ |
797 | ident = str; | |
3882b010 | 798 | while (ISALNUM (*str)) |
a85d7ed0 NC |
799 | str++; |
800 | len = str - ident; | |
16a419ba NC |
801 | if (len != 4 || strncasecmp (ident, "lit", 3) != 0 |
802 | || (ident[3]!='1' && ident[3]!='2' && ident[3]!='4' && ident[3]!='8')) | |
a85d7ed0 NC |
803 | return suffix; /* no modification */ |
804 | nbytes = ident[3] - '0'; | |
805 | ||
806 | reloc = BFD_RELOC_UNUSED; | |
07855bec NC |
807 | if (suffix == ELF_SUFFIX_GOT) |
808 | { | |
809 | if (nbytes == 2) | |
810 | reloc = BFD_RELOC_390_GOT16; | |
811 | else if (nbytes == 4) | |
812 | reloc = BFD_RELOC_32_GOT_PCREL; | |
813 | else if (nbytes == 8) | |
814 | reloc = BFD_RELOC_390_GOT64; | |
815 | } | |
816 | else if (suffix == ELF_SUFFIX_PLT) | |
817 | { | |
818 | if (nbytes == 4) | |
819 | reloc = BFD_RELOC_390_PLT32; | |
820 | else if (nbytes == 8) | |
821 | reloc = BFD_RELOC_390_PLT64; | |
822 | } | |
a85d7ed0 | 823 | |
07855bec | 824 | if (suffix != ELF_SUFFIX_NONE && reloc == BFD_RELOC_UNUSED) |
a85d7ed0 | 825 | as_bad (_("Invalid suffix for literal pool entry")); |
a85d7ed0 NC |
826 | |
827 | /* Search the pool if the new entry is a duplicate. */ | |
07855bec NC |
828 | if (exp_p->X_op == O_big) |
829 | { | |
830 | /* Special processing for big numbers. */ | |
831 | for (lpe = lpe_list; lpe != NULL; lpe = lpe->next) | |
832 | { | |
833 | if (lpe->ex.X_op == O_big) | |
834 | { | |
835 | if (exp_p->X_add_number <= 0 && lpe->ex.X_add_number <= 0) | |
836 | { | |
837 | if (memcmp (&generic_floating_point_number, &lpe->floatnum, | |
838 | sizeof (FLONUM_TYPE)) == 0) | |
839 | break; | |
840 | } | |
841 | else if (exp_p->X_add_number == lpe->ex.X_add_number) | |
842 | { | |
843 | if (memcmp (generic_bignum, lpe->bignum, | |
844 | sizeof (LITTLENUM_TYPE)*exp_p->X_add_number) == 0) | |
845 | break; | |
846 | } | |
847 | } | |
848 | } | |
a85d7ed0 | 849 | } |
07855bec NC |
850 | else |
851 | { | |
852 | /* Processing for 'normal' data types. */ | |
853 | for (lpe = lpe_list; lpe != NULL; lpe = lpe->next) | |
16a419ba NC |
854 | if (lpe->nbytes == nbytes && lpe->reloc == reloc |
855 | && s390_exp_compare(exp_p, &lpe->ex) != 0) | |
07855bec | 856 | break; |
a85d7ed0 | 857 | } |
07855bec NC |
858 | |
859 | if (lpe == NULL) | |
860 | { | |
861 | /* A new literal. */ | |
862 | if (lpe_free_list != NULL) | |
863 | { | |
864 | lpe = lpe_free_list; | |
865 | lpe_free_list = lpe_free_list->next; | |
866 | } | |
a85d7ed0 | 867 | else |
07855bec | 868 | { |
07726851 | 869 | lpe = (struct s390_lpe *) xmalloc(sizeof (struct s390_lpe)); |
07855bec NC |
870 | } |
871 | ||
872 | lpe->ex = *exp_p; | |
873 | ||
874 | if (exp_p->X_op == O_big) | |
875 | { | |
876 | if (exp_p->X_add_number <= 0) | |
877 | lpe->floatnum = generic_floating_point_number; | |
878 | else if (exp_p->X_add_number <= 4) | |
879 | memcpy (lpe->bignum, generic_bignum, | |
07726851 | 880 | exp_p->X_add_number*sizeof (LITTLENUM_TYPE)); |
07855bec NC |
881 | else |
882 | as_bad (_("Big number is too big")); | |
883 | } | |
884 | ||
885 | lpe->nbytes = nbytes; | |
886 | lpe->reloc = reloc; | |
887 | /* Literal pool name defined ? */ | |
888 | if (lp_sym == NULL) | |
889 | { | |
07726851 | 890 | sprintf (tmp_name, ".L\001%i", lp_count); |
07855bec NC |
891 | lp_sym = symbol_make(tmp_name); |
892 | } | |
a85d7ed0 | 893 | |
07855bec | 894 | /* Make name for literal pool entry. */ |
07726851 | 895 | sprintf (tmp_name, ".L\001%i\002%i", lp_count, lpe_count); |
07855bec NC |
896 | lpe_count++; |
897 | lpe->sym = symbol_make(tmp_name); | |
898 | ||
899 | /* Add to literal pool list. */ | |
900 | lpe->next = NULL; | |
901 | if (lpe_list_tail != NULL) | |
902 | { | |
903 | lpe_list_tail->next = lpe; | |
904 | lpe_list_tail = lpe; | |
905 | } | |
906 | else | |
907 | lpe_list = lpe_list_tail = lpe; | |
908 | } | |
198ce79b | 909 | |
a85d7ed0 NC |
910 | /* Now change exp_p to the offset into the literal pool. |
911 | Thats the expression: .L^Ax^By-.L^Ax */ | |
912 | exp_p->X_add_symbol = lpe->sym; | |
913 | exp_p->X_op_symbol = lp_sym; | |
914 | exp_p->X_op = O_subtract; | |
915 | exp_p->X_add_number = 0; | |
916 | ||
917 | *str_p = str; | |
918 | ||
919 | /* We change the suffix type to ELF_SUFFIX_NONE, because | |
920 | the difference of two local labels is just a number. */ | |
921 | return ELF_SUFFIX_NONE; | |
922 | } | |
923 | ||
924 | /* Like normal .long/.short/.word, except support @got, etc. | |
925 | clobbers input_line_pointer, checks end-of-line. */ | |
926 | static void | |
927 | s390_elf_cons (nbytes) | |
928 | register int nbytes; /* 1=.byte, 2=.word, 4=.long */ | |
929 | { | |
930 | expressionS exp; | |
931 | elf_suffix_type suffix; | |
932 | ||
07855bec NC |
933 | if (is_it_end_of_statement ()) |
934 | { | |
935 | demand_empty_rest_of_line (); | |
936 | return; | |
937 | } | |
a85d7ed0 | 938 | |
07855bec NC |
939 | do |
940 | { | |
941 | expression (&exp); | |
942 | ||
943 | if (exp.X_op == O_symbol | |
944 | && *input_line_pointer == '@' | |
945 | && (suffix = s390_elf_suffix (&input_line_pointer, &exp)) != ELF_SUFFIX_NONE) | |
946 | { | |
947 | bfd_reloc_code_real_type reloc; | |
948 | reloc_howto_type *reloc_howto; | |
949 | int size; | |
950 | char *where; | |
951 | ||
952 | if (nbytes == 2 && suffix == ELF_SUFFIX_GOT) | |
953 | reloc = BFD_RELOC_390_GOT16; | |
954 | else if (nbytes == 4 && suffix == ELF_SUFFIX_GOT) | |
955 | reloc = BFD_RELOC_32_GOT_PCREL; | |
956 | else if (nbytes == 8 && suffix == ELF_SUFFIX_GOT) | |
957 | reloc = BFD_RELOC_390_GOT64; | |
958 | else if (nbytes == 4 && suffix == ELF_SUFFIX_PLT) | |
959 | reloc = BFD_RELOC_390_PLT32; | |
960 | else if (nbytes == 8 && suffix == ELF_SUFFIX_PLT) | |
961 | reloc = BFD_RELOC_390_PLT64; | |
962 | else | |
963 | reloc = BFD_RELOC_UNUSED; | |
964 | ||
965 | if (reloc != BFD_RELOC_UNUSED) | |
966 | { | |
967 | reloc_howto = bfd_reloc_type_lookup (stdoutput, reloc); | |
968 | size = bfd_get_reloc_size (reloc_howto); | |
969 | if (size > nbytes) | |
970 | as_bad (_("%s relocations do not fit in %d bytes"), | |
971 | reloc_howto->name, nbytes); | |
07726851 | 972 | where = frag_more (nbytes); |
07855bec | 973 | md_number_to_chars (where, 0, size); |
198ce79b AJ |
974 | /* To make fixup_segment do the pc relative conversion the |
975 | pcrel parameter on the fix_new_exp call needs to be false. */ | |
976 | fix_new_exp (frag_now, where - frag_now->fr_literal, | |
977 | size, &exp, false, reloc); | |
07855bec NC |
978 | } |
979 | else | |
980 | as_bad (_("relocation not applicable")); | |
981 | } | |
a85d7ed0 | 982 | else |
07855bec NC |
983 | emit_expr (&exp, (unsigned int) nbytes); |
984 | } | |
985 | while (*input_line_pointer++ == ','); | |
a85d7ed0 NC |
986 | |
987 | input_line_pointer--; /* Put terminator back into stream. */ | |
988 | demand_empty_rest_of_line (); | |
989 | } | |
990 | ||
991 | /* We need to keep a list of fixups. We can't simply generate them as | |
992 | we go, because that would require us to first create the frag, and | |
993 | that would screw up references to ``.''. */ | |
994 | ||
995 | struct s390_fixup | |
07855bec NC |
996 | { |
997 | expressionS exp; | |
998 | int opindex; | |
999 | bfd_reloc_code_real_type reloc; | |
1000 | }; | |
a85d7ed0 NC |
1001 | |
1002 | #define MAX_INSN_FIXUPS (4) | |
1003 | ||
1004 | /* This routine is called for each instruction to be assembled. */ | |
1005 | ||
9d654c1c | 1006 | static char * |
a85d7ed0 NC |
1007 | md_gather_operands (str, insn, opcode) |
1008 | char *str; | |
1009 | unsigned char *insn; | |
1010 | const struct s390_opcode *opcode; | |
1011 | { | |
1012 | struct s390_fixup fixups[MAX_INSN_FIXUPS]; | |
1013 | const struct s390_operand *operand; | |
1014 | const unsigned char *opindex_ptr; | |
1015 | elf_suffix_type suffix; | |
1016 | bfd_reloc_code_real_type reloc; | |
1017 | int skip_optional; | |
1018 | int parentheses; | |
1019 | char *f; | |
1020 | int fc, i; | |
1021 | ||
3882b010 | 1022 | while (ISSPACE (*str)) str++; |
a85d7ed0 NC |
1023 | |
1024 | parentheses = 0; | |
1025 | skip_optional = 0; | |
1026 | ||
1027 | /* Gather the operands. */ | |
1028 | fc = 0; | |
07855bec NC |
1029 | for (opindex_ptr = opcode->operands; *opindex_ptr != 0; opindex_ptr++) |
1030 | { | |
1031 | expressionS ex; | |
1032 | char *hold; | |
1033 | ||
1034 | operand = s390_operands + *opindex_ptr; | |
198ce79b | 1035 | |
07855bec NC |
1036 | if (skip_optional && (operand->flags & S390_OPERAND_INDEX)) |
1037 | { | |
1038 | /* We do an early skip. For D(X,B) constructions the index | |
198ce79b | 1039 | register is skipped (X is optional). For D(L,B) the base |
07855bec NC |
1040 | register will be the skipped operand, because L is NOT |
1041 | optional. */ | |
1042 | skip_optional = 0; | |
1043 | continue; | |
1044 | } | |
198ce79b | 1045 | |
07855bec NC |
1046 | /* Gather the operand. */ |
1047 | hold = input_line_pointer; | |
1048 | input_line_pointer = str; | |
1049 | ||
1050 | if (! register_name (&ex)) /* parse the operand */ | |
1051 | expression (&ex); | |
198ce79b | 1052 | |
07855bec NC |
1053 | str = input_line_pointer; |
1054 | input_line_pointer = hold; | |
198ce79b | 1055 | |
07855bec NC |
1056 | /* Write the operand to the insn. */ |
1057 | if (ex.X_op == O_illegal) | |
1058 | as_bad (_("illegal operand")); | |
1059 | else if (ex.X_op == O_absent) | |
1060 | as_bad (_("missing operand")); | |
1061 | else if (ex.X_op == O_register || ex.X_op == O_constant) | |
1062 | { | |
1063 | s390_lit_suffix (&str, &ex, ELF_SUFFIX_NONE); | |
1064 | ||
1065 | if (ex.X_op != O_register && ex.X_op != O_constant) | |
1066 | { | |
1067 | /* We need to generate a fixup for the | |
1068 | expression returned by s390_lit_suffix. */ | |
1069 | if (fc >= MAX_INSN_FIXUPS) | |
1070 | as_fatal (_("too many fixups")); | |
1071 | fixups[fc].exp = ex; | |
1072 | fixups[fc].opindex = *opindex_ptr; | |
1073 | fixups[fc].reloc = BFD_RELOC_UNUSED; | |
1074 | ++fc; | |
1075 | } | |
1076 | else | |
1077 | { | |
16a419ba NC |
1078 | if ((operand->flags & S390_OPERAND_INDEX) |
1079 | && ex.X_add_number == 0 | |
1080 | && warn_areg_zero == TRUE) | |
07726851 | 1081 | as_warn ("index register specified but zero"); |
16a419ba NC |
1082 | if ((operand->flags & S390_OPERAND_BASE) |
1083 | && ex.X_add_number == 0 | |
1084 | && warn_areg_zero == TRUE) | |
07726851 | 1085 | as_warn ("base register specified but zero"); |
07855bec NC |
1086 | s390_insert_operand (insn, operand, ex.X_add_number, NULL, 0); |
1087 | } | |
1088 | } | |
1089 | else | |
1090 | { | |
1091 | suffix = s390_elf_suffix (&str, &ex); | |
1092 | suffix = s390_lit_suffix (&str, &ex, suffix); | |
1093 | reloc = BFD_RELOC_UNUSED; | |
1094 | ||
1095 | if (suffix == ELF_SUFFIX_GOT) | |
1096 | { | |
1097 | if (operand->flags & S390_OPERAND_DISP) | |
1098 | reloc = BFD_RELOC_390_GOT12; | |
16a419ba NC |
1099 | else if ((operand->flags & S390_OPERAND_SIGNED) |
1100 | && (operand->bits == 16)) | |
07855bec | 1101 | reloc = BFD_RELOC_390_GOT16; |
16a419ba NC |
1102 | else if ((operand->flags & S390_OPERAND_PCREL) |
1103 | && (operand->bits == 32)) | |
07855bec NC |
1104 | reloc = BFD_RELOC_390_GOTENT; |
1105 | } | |
1106 | else if (suffix == ELF_SUFFIX_PLT) | |
1107 | { | |
16a419ba NC |
1108 | if ((operand->flags & S390_OPERAND_PCREL) |
1109 | && (operand->bits == 16)) | |
07855bec | 1110 | reloc = BFD_RELOC_390_PLT16DBL; |
16a419ba NC |
1111 | else if ((operand->flags & S390_OPERAND_PCREL) |
1112 | && (operand->bits == 32)) | |
07855bec NC |
1113 | reloc = BFD_RELOC_390_PLT32DBL; |
1114 | } | |
1115 | else if (suffix == ELF_SUFFIX_GOTENT) | |
1116 | { | |
16a419ba NC |
1117 | if ((operand->flags & S390_OPERAND_PCREL) |
1118 | && (operand->bits == 32)) | |
07855bec NC |
1119 | reloc = BFD_RELOC_390_GOTENT; |
1120 | } | |
1121 | ||
1122 | if (suffix != ELF_SUFFIX_NONE && reloc == BFD_RELOC_UNUSED) | |
1123 | as_bad (_("invalid operand suffix")); | |
1124 | /* We need to generate a fixup of type 'reloc' for this | |
1125 | expression. */ | |
a85d7ed0 NC |
1126 | if (fc >= MAX_INSN_FIXUPS) |
1127 | as_fatal (_("too many fixups")); | |
1128 | fixups[fc].exp = ex; | |
1129 | fixups[fc].opindex = *opindex_ptr; | |
07855bec | 1130 | fixups[fc].reloc = reloc; |
a85d7ed0 | 1131 | ++fc; |
07855bec | 1132 | } |
198ce79b | 1133 | |
07855bec NC |
1134 | /* Check the next character. The call to expression has advanced |
1135 | str past any whitespace. */ | |
1136 | if (operand->flags & S390_OPERAND_DISP) | |
1137 | { | |
1138 | /* After a displacement a block in parentheses can start. */ | |
1139 | if (*str != '(') | |
1140 | { | |
1141 | /* Check if parethesed block can be skipped. If the next | |
1142 | operand is neiter an optional operand nor a base register | |
1143 | then we have a syntax error. */ | |
1144 | operand = s390_operands + *(++opindex_ptr); | |
1145 | if (!(operand->flags & (S390_OPERAND_INDEX|S390_OPERAND_BASE))) | |
1146 | as_bad (_("syntax error; missing '(' after displacement")); | |
1147 | ||
1148 | /* Ok, skip all operands until S390_OPERAND_BASE. */ | |
1149 | while (!(operand->flags & S390_OPERAND_BASE)) | |
1150 | operand = s390_operands + *(++opindex_ptr); | |
198ce79b | 1151 | |
07855bec NC |
1152 | /* If there is a next operand it must be seperated by a comma. */ |
1153 | if (opindex_ptr[1] != '\0') | |
1154 | { | |
1155 | if (*str++ != ',') | |
07726851 | 1156 | as_bad (_("syntax error; expected ,")); |
07855bec NC |
1157 | } |
1158 | } | |
1159 | else | |
1160 | { | |
1161 | /* We found an opening parentheses. */ | |
1162 | str++; | |
1163 | for (f = str; *f != '\0'; f++) | |
1164 | if (*f == ',' || *f == ')') | |
1165 | break; | |
1166 | /* If there is no comma until the closing parentheses OR | |
1167 | there is a comma right after the opening parentheses, | |
1168 | we have to skip optional operands. */ | |
1169 | if (*f == ',' && f == str) | |
1170 | { | |
1171 | /* comma directly after '(' ? */ | |
1172 | skip_optional = 1; | |
1173 | str++; | |
1174 | } | |
1175 | else | |
1176 | skip_optional = (*f != ','); | |
1177 | } | |
1178 | } | |
1179 | else if (operand->flags & S390_OPERAND_BASE) | |
1180 | { | |
1181 | /* After the base register the parenthesed block ends. */ | |
1182 | if (*str++ != ')') | |
1183 | as_bad (_("syntax error; missing ')' after base register")); | |
1184 | skip_optional = 0; | |
1185 | /* If there is a next operand it must be seperated by a comma. */ | |
1186 | if (opindex_ptr[1] != '\0') | |
1187 | { | |
1188 | if (*str++ != ',') | |
1189 | as_bad (_("syntax error; expected ,")); | |
1190 | } | |
1191 | } | |
1192 | else | |
1193 | { | |
1194 | /* We can find an 'early' closing parentheses in e.g. D(L) instead | |
1195 | of D(L,B). In this case the base register has to be skipped. */ | |
1196 | if (*str == ')') | |
1197 | { | |
1198 | operand = s390_operands + *(++opindex_ptr); | |
1199 | ||
1200 | if (!(operand->flags & S390_OPERAND_BASE)) | |
1201 | as_bad (_("syntax error; ')' not allowed here")); | |
1202 | str++; | |
1203 | } | |
1204 | /* If there is a next operand it must be seperated by a comma. */ | |
1205 | if (opindex_ptr[1] != '\0') | |
1206 | { | |
1207 | if (*str++ != ',') | |
07726851 | 1208 | as_bad (_("syntax error; expected ,")); |
07855bec | 1209 | } |
a85d7ed0 | 1210 | } |
a85d7ed0 | 1211 | } |
a85d7ed0 | 1212 | |
3882b010 | 1213 | while (ISSPACE (*str)) |
a85d7ed0 NC |
1214 | ++str; |
1215 | ||
07855bec NC |
1216 | if (*str != '\0') |
1217 | { | |
1218 | char *linefeed; | |
a85d7ed0 | 1219 | |
07726851 | 1220 | if ((linefeed = strchr (str, '\n')) != NULL) |
07855bec NC |
1221 | *linefeed = '\0'; |
1222 | as_bad (_("junk at end of line: `%s'"), str); | |
1223 | if (linefeed != NULL) | |
1224 | *linefeed = '\n'; | |
1225 | } | |
a85d7ed0 NC |
1226 | |
1227 | /* Write out the instruction. */ | |
1228 | f = frag_more (opcode->oplen); | |
07855bec | 1229 | memcpy (f, insn, opcode->oplen); |
8f5b2891 | 1230 | dwarf2_emit_insn (opcode->oplen); |
a85d7ed0 NC |
1231 | |
1232 | /* Create any fixups. At this point we do not use a | |
1233 | bfd_reloc_code_real_type, but instead just use the | |
1234 | BFD_RELOC_UNUSED plus the operand index. This lets us easily | |
1235 | handle fixups for any operand type, although that is admittedly | |
1236 | not a very exciting feature. We pick a BFD reloc type in | |
1237 | md_apply_fix3. */ | |
07855bec NC |
1238 | for (i = 0; i < fc; i++) |
1239 | { | |
1240 | operand = s390_operands + fixups[i].opindex; | |
a85d7ed0 | 1241 | |
07855bec NC |
1242 | if (fixups[i].reloc != BFD_RELOC_UNUSED) |
1243 | { | |
1244 | reloc_howto_type *reloc_howto; | |
1245 | fixS *fixP; | |
1246 | int size; | |
198ce79b | 1247 | |
07855bec NC |
1248 | reloc_howto = bfd_reloc_type_lookup (stdoutput, fixups[i].reloc); |
1249 | if (!reloc_howto) | |
1250 | abort (); | |
198ce79b | 1251 | |
07855bec NC |
1252 | size = bfd_get_reloc_size (reloc_howto); |
1253 | ||
1254 | if (size < 1 || size > 4) | |
1255 | abort (); | |
198ce79b AJ |
1256 | |
1257 | fixP = fix_new_exp (frag_now, | |
1258 | f - frag_now->fr_literal + (operand->shift/8), | |
07855bec NC |
1259 | size, &fixups[i].exp, reloc_howto->pc_relative, |
1260 | fixups[i].reloc); | |
1261 | /* Turn off overflow checking in fixup_segment. This is necessary | |
1262 | because fixup_segment will signal an overflow for large 4 byte | |
1263 | quantities for GOT12 relocations. */ | |
16a419ba NC |
1264 | if ( fixups[i].reloc == BFD_RELOC_390_GOT12 |
1265 | || fixups[i].reloc == BFD_RELOC_390_GOT16) | |
07855bec NC |
1266 | fixP->fx_no_overflow = 1; |
1267 | } | |
1268 | else | |
1269 | fix_new_exp (frag_now, f - frag_now->fr_literal, 4, &fixups[i].exp, | |
1270 | (operand->flags & S390_OPERAND_PCREL) != 0, | |
1271 | ((bfd_reloc_code_real_type) | |
1272 | (fixups[i].opindex + (int) BFD_RELOC_UNUSED))); | |
1273 | } | |
a85d7ed0 NC |
1274 | return str; |
1275 | } | |
1276 | ||
1277 | /* This routine is called for each instruction to be assembled. */ | |
1278 | ||
1279 | void | |
1280 | md_assemble (str) | |
1281 | char *str; | |
1282 | { | |
1283 | const struct s390_opcode *opcode; | |
1284 | unsigned char insn[6]; | |
1285 | char *s; | |
1286 | ||
1287 | /* Get the opcode. */ | |
3882b010 | 1288 | for (s = str; *s != '\0' && ! ISSPACE (*s); s++) |
a85d7ed0 NC |
1289 | ; |
1290 | if (*s != '\0') | |
1291 | *s++ = '\0'; | |
1292 | ||
1293 | /* Look up the opcode in the hash table. */ | |
1294 | opcode = (struct s390_opcode *) hash_find (s390_opcode_hash, str); | |
07855bec NC |
1295 | if (opcode == (const struct s390_opcode *) NULL) |
1296 | { | |
1297 | as_bad (_("Unrecognized opcode: `%s'"), str); | |
1298 | return; | |
1299 | } | |
1300 | else if (!(opcode->architecture & current_arch_mask)) | |
1301 | { | |
07726851 | 1302 | as_bad ("Opcode %s not available in this architecture", str); |
07855bec NC |
1303 | return; |
1304 | } | |
a85d7ed0 | 1305 | |
07726851 | 1306 | memcpy (insn, opcode->opcode, sizeof (insn)); |
07855bec | 1307 | md_gather_operands (s, insn, opcode); |
a85d7ed0 NC |
1308 | } |
1309 | ||
1310 | #ifndef WORKING_DOT_WORD | |
1311 | /* Handle long and short jumps. We don't support these */ | |
1312 | void | |
1313 | md_create_short_jump (ptr, from_addr, to_addr, frag, to_symbol) | |
1314 | char *ptr; | |
1315 | addressT from_addr, to_addr; | |
1316 | fragS *frag; | |
1317 | symbolS *to_symbol; | |
1318 | { | |
1319 | abort (); | |
1320 | } | |
1321 | ||
1322 | void | |
1323 | md_create_long_jump (ptr, from_addr, to_addr, frag, to_symbol) | |
1324 | char *ptr; | |
1325 | addressT from_addr, to_addr; | |
1326 | fragS *frag; | |
1327 | symbolS *to_symbol; | |
1328 | { | |
1329 | abort (); | |
1330 | } | |
1331 | #endif | |
1332 | ||
1333 | void | |
1334 | s390_bss (ignore) | |
1335 | int ignore ATTRIBUTE_UNUSED; | |
1336 | { | |
1337 | /* We don't support putting frags in the BSS segment, we fake it | |
1338 | by marking in_bss, then looking at s_skip for clues. */ | |
1339 | ||
1340 | subseg_set (bss_section, 0); | |
1341 | demand_empty_rest_of_line (); | |
1342 | } | |
1343 | ||
1344 | /* Pseudo-op handling. */ | |
1345 | ||
1346 | void | |
07726851 | 1347 | s390_insn (ignore) |
a85d7ed0 NC |
1348 | int ignore ATTRIBUTE_UNUSED; |
1349 | { | |
1350 | expressionS exp; | |
1351 | const struct s390_opcode *opformat; | |
1352 | unsigned char insn[6]; | |
1353 | char *s; | |
1354 | ||
1355 | /* Get the opcode format. */ | |
1356 | s = input_line_pointer; | |
3882b010 | 1357 | while (*s != '\0' && *s != ',' && ! ISSPACE (*s)) |
a85d7ed0 NC |
1358 | s++; |
1359 | if (*s != ',') | |
1360 | as_bad (_("Invalid .insn format\n")); | |
1361 | *s++ = '\0'; | |
1362 | ||
1363 | /* Look up the opcode in the hash table. */ | |
1364 | opformat = (struct s390_opcode *) | |
1365 | hash_find (s390_opformat_hash, input_line_pointer); | |
07855bec NC |
1366 | if (opformat == (const struct s390_opcode *) NULL) |
1367 | { | |
1368 | as_bad (_("Unrecognized opcode format: `%s'"), input_line_pointer); | |
1369 | return; | |
1370 | } | |
a85d7ed0 NC |
1371 | input_line_pointer = s; |
1372 | expression (&exp); | |
07855bec NC |
1373 | if (exp.X_op == O_constant) |
1374 | { | |
16a419ba NC |
1375 | if ( ((opformat->oplen == 6) && (exp.X_op > 0) && (exp.X_op < (1ULL << 48))) |
1376 | || ((opformat->oplen == 4) && (exp.X_op > 0) && (exp.X_op < (1ULL << 32))) | |
1377 | || ((opformat->oplen == 2) && (exp.X_op > 0) && (exp.X_op < (1ULL << 16)))) | |
07855bec NC |
1378 | md_number_to_chars (insn, exp.X_add_number, opformat->oplen); |
1379 | else | |
07726851 | 1380 | as_bad (_("Invalid .insn format\n")); |
07855bec NC |
1381 | } |
1382 | else if (exp.X_op == O_big) | |
1383 | { | |
16a419ba NC |
1384 | if (exp.X_add_number > 0 |
1385 | && opformat->oplen == 6 | |
1386 | && generic_bignum[3] == 0) | |
07855bec NC |
1387 | { |
1388 | md_number_to_chars (insn, generic_bignum[2], 2); | |
1389 | md_number_to_chars (&insn[2], generic_bignum[1], 2); | |
1390 | md_number_to_chars (&insn[4], generic_bignum[0], 2); | |
1391 | } | |
1392 | else | |
07726851 | 1393 | as_bad (_("Invalid .insn format\n")); |
07855bec NC |
1394 | } |
1395 | else | |
a85d7ed0 | 1396 | as_bad (_("second operand of .insn not a constant\n")); |
a85d7ed0 | 1397 | |
b6849f55 NC |
1398 | if (strcmp (opformat->name, "e") != 0 && *input_line_pointer++ != ',') |
1399 | as_bad (_("missing comma after insn constant\n")); | |
1400 | ||
07726851 | 1401 | if ((s = strchr (input_line_pointer, '\n')) != NULL) |
a85d7ed0 | 1402 | *s = '\0'; |
b6849f55 NC |
1403 | input_line_pointer = md_gather_operands (input_line_pointer, insn, |
1404 | opformat); | |
a85d7ed0 NC |
1405 | if (s != NULL) |
1406 | *s = '\n'; | |
1407 | demand_empty_rest_of_line (); | |
1408 | } | |
1409 | ||
1410 | /* The .byte pseudo-op. This is similar to the normal .byte | |
1411 | pseudo-op, but it can also take a single ASCII string. */ | |
1412 | ||
1413 | static void | |
1414 | s390_byte (ignore) | |
1415 | int ignore ATTRIBUTE_UNUSED; | |
1416 | { | |
1417 | if (*input_line_pointer != '\"') | |
1418 | { | |
1419 | cons (1); | |
1420 | return; | |
1421 | } | |
1422 | ||
1423 | /* Gather characters. A real double quote is doubled. Unusual | |
1424 | characters are not permitted. */ | |
1425 | ++input_line_pointer; | |
1426 | while (1) | |
1427 | { | |
1428 | char c; | |
1429 | ||
1430 | c = *input_line_pointer++; | |
1431 | ||
1432 | if (c == '\"') | |
1433 | { | |
1434 | if (*input_line_pointer != '\"') | |
1435 | break; | |
1436 | ++input_line_pointer; | |
1437 | } | |
1438 | ||
1439 | FRAG_APPEND_1_CHAR (c); | |
1440 | } | |
1441 | ||
1442 | demand_empty_rest_of_line (); | |
1443 | } | |
1444 | ||
1445 | /* The .ltorg pseudo-op.This emits all literals defined since the last | |
198ce79b | 1446 | .ltorg or the invocation of gas. Literals are defined with the |
a85d7ed0 NC |
1447 | @lit suffix. */ |
1448 | ||
1449 | static void | |
1450 | s390_literals (ignore) | |
1451 | int ignore ATTRIBUTE_UNUSED; | |
1452 | { | |
1453 | struct s390_lpe *lpe; | |
1454 | ||
1455 | if (lp_sym == NULL || lpe_count == 0) | |
1456 | return; /* nothing to be done */ | |
1457 | ||
1458 | /* Emit symbol for start of literal pool. */ | |
1459 | S_SET_SEGMENT (lp_sym, now_seg); | |
1460 | S_SET_VALUE (lp_sym, (valueT) frag_now_fix ()); | |
1461 | lp_sym->sy_frag = frag_now; | |
1462 | ||
07855bec NC |
1463 | while (lpe_list) |
1464 | { | |
1465 | lpe = lpe_list; | |
1466 | lpe_list = lpe_list->next; | |
1467 | S_SET_SEGMENT (lpe->sym, now_seg); | |
1468 | S_SET_VALUE (lpe->sym, (valueT) frag_now_fix ()); | |
1469 | lpe->sym->sy_frag = frag_now; | |
1470 | ||
1471 | /* Emit literal pool entry. */ | |
1472 | if (lpe->reloc != BFD_RELOC_UNUSED) | |
1473 | { | |
198ce79b | 1474 | reloc_howto_type *reloc_howto = |
07855bec NC |
1475 | bfd_reloc_type_lookup (stdoutput, lpe->reloc); |
1476 | int size = bfd_get_reloc_size (reloc_howto); | |
1477 | char *where; | |
1478 | ||
1479 | if (size > lpe->nbytes) | |
1480 | as_bad (_("%s relocations do not fit in %d bytes"), | |
1481 | reloc_howto->name, lpe->nbytes); | |
07726851 | 1482 | where = frag_more (lpe->nbytes); |
07855bec NC |
1483 | md_number_to_chars (where, 0, size); |
1484 | fix_new_exp (frag_now, where - frag_now->fr_literal, | |
1485 | size, &lpe->ex, reloc_howto->pc_relative, lpe->reloc); | |
1486 | } | |
1487 | else | |
1488 | { | |
1489 | if (lpe->ex.X_op == O_big) | |
1490 | { | |
1491 | if (lpe->ex.X_add_number <= 0) | |
1492 | generic_floating_point_number = lpe->floatnum; | |
1493 | else | |
1494 | memcpy (generic_bignum, lpe->bignum, | |
07726851 | 1495 | lpe->ex.X_add_number*sizeof (LITTLENUM_TYPE)); |
07855bec NC |
1496 | } |
1497 | emit_expr (&lpe->ex, lpe->nbytes); | |
1498 | } | |
a85d7ed0 | 1499 | |
07855bec NC |
1500 | lpe->next = lpe_free_list; |
1501 | lpe_free_list = lpe; | |
1502 | } | |
a85d7ed0 NC |
1503 | lpe_list_tail = NULL; |
1504 | lp_sym = NULL; | |
1505 | lp_count++; | |
1506 | lpe_count = 0; | |
1507 | } | |
1508 | ||
1509 | /* Turn a string in input_line_pointer into a floating point constant | |
1510 | of type type, and store the appropriate bytes in *litp. The number | |
1511 | of LITTLENUMS emitted is stored in *sizep . An error message is | |
1512 | returned, or NULL on OK. */ | |
1513 | ||
1514 | char * | |
1515 | md_atof (type, litp, sizep) | |
1516 | int type; | |
1517 | char *litp; | |
1518 | int *sizep; | |
1519 | { | |
1520 | int prec; | |
1521 | LITTLENUM_TYPE words[4]; | |
1522 | char *t; | |
1523 | int i; | |
1524 | ||
1525 | switch (type) | |
1526 | { | |
1527 | case 'f': | |
1528 | prec = 2; | |
1529 | break; | |
1530 | ||
1531 | case 'd': | |
1532 | prec = 4; | |
1533 | break; | |
1534 | ||
1535 | default: | |
1536 | *sizep = 0; | |
1537 | return "bad call to md_atof"; | |
1538 | } | |
1539 | ||
1540 | t = atof_ieee (input_line_pointer, type, words); | |
1541 | if (t) | |
1542 | input_line_pointer = t; | |
1543 | ||
1544 | *sizep = prec * 2; | |
1545 | ||
1546 | for (i = 0; i < prec; i++) | |
1547 | { | |
1548 | md_number_to_chars (litp, (valueT) words[i], 2); | |
1549 | litp += 2; | |
1550 | } | |
198ce79b | 1551 | |
a85d7ed0 NC |
1552 | return NULL; |
1553 | } | |
1554 | ||
1555 | /* Align a section (I don't know why this is machine dependent). */ | |
1556 | ||
1557 | valueT | |
1558 | md_section_align (seg, addr) | |
1559 | asection *seg; | |
1560 | valueT addr; | |
1561 | { | |
1562 | int align = bfd_get_section_alignment (stdoutput, seg); | |
1563 | ||
1564 | return ((addr + (1 << align) - 1) & (-1 << align)); | |
1565 | } | |
1566 | ||
1567 | /* We don't have any form of relaxing. */ | |
1568 | ||
1569 | int | |
1570 | md_estimate_size_before_relax (fragp, seg) | |
1571 | fragS *fragp ATTRIBUTE_UNUSED; | |
1572 | asection *seg ATTRIBUTE_UNUSED; | |
1573 | { | |
1574 | abort (); | |
1575 | return 0; | |
1576 | } | |
1577 | ||
1578 | /* Convert a machine dependent frag. We never generate these. */ | |
1579 | ||
1580 | void | |
1581 | md_convert_frag (abfd, sec, fragp) | |
1582 | bfd *abfd ATTRIBUTE_UNUSED; | |
1583 | asection *sec ATTRIBUTE_UNUSED; | |
1584 | fragS *fragp ATTRIBUTE_UNUSED; | |
1585 | { | |
1586 | abort (); | |
1587 | } | |
1588 | ||
1589 | symbolS * | |
1590 | md_undefined_symbol (name) | |
1591 | char *name; | |
1592 | { | |
1593 | if (*name == '_' && *(name+1) == 'G' | |
07726851 | 1594 | && strcmp (name, "_GLOBAL_OFFSET_TABLE_") == 0) |
a85d7ed0 | 1595 | { |
07726851 | 1596 | if (!GOT_symbol) |
a85d7ed0 | 1597 | { |
07726851 KH |
1598 | if (symbol_find (name)) |
1599 | as_bad (_("GOT already in symbol table")); | |
a85d7ed0 NC |
1600 | GOT_symbol = symbol_new (name, undefined_section, |
1601 | (valueT) 0, &zero_address_frag); | |
1602 | } | |
1603 | return GOT_symbol; | |
1604 | } | |
1605 | return 0; | |
1606 | } | |
1607 | ||
1608 | /* Functions concerning relocs. */ | |
1609 | ||
1610 | /* The location from which a PC relative jump should be calculated, | |
1611 | given a PC relative reloc. */ | |
1612 | ||
1613 | long | |
1614 | md_pcrel_from_section (fixp, sec) | |
1615 | fixS *fixp; | |
1616 | segT sec ATTRIBUTE_UNUSED; | |
1617 | { | |
1618 | return fixp->fx_frag->fr_address + fixp->fx_where; | |
1619 | } | |
1620 | ||
1621 | /* Here we decide which fixups can be adjusted to make them relative to | |
1622 | the beginning of the section instead of the symbol. Basically we need | |
1623 | to make sure that the dynamic relocations are done correctly, so in | |
1624 | some cases we force the original symbol to be used. */ | |
1625 | int | |
1626 | tc_s390_fix_adjustable(fixP) | |
1627 | fixS * fixP; | |
1628 | { | |
1629 | /* Prevent all adjustments to global symbols. */ | |
1630 | if (S_IS_EXTERN (fixP->fx_addsy)) | |
1631 | return 0; | |
1632 | if (S_IS_WEAK (fixP->fx_addsy)) | |
1633 | return 0; | |
302576af MS |
1634 | /* Don't adjust pc-relative references to merge sections. */ |
1635 | if ((S_GET_SEGMENT(fixP->fx_addsy)->flags & SEC_MERGE) != 0 | |
1636 | && fixP->fx_pcrel) | |
1637 | return 0; | |
a85d7ed0 | 1638 | /* adjust_reloc_syms doesn't know about the GOT. */ |
16a419ba | 1639 | if ( fixP->fx_r_type == BFD_RELOC_32_GOTOFF |
a85d7ed0 NC |
1640 | || fixP->fx_r_type == BFD_RELOC_390_PLT16DBL |
1641 | || fixP->fx_r_type == BFD_RELOC_390_PLT32 | |
1642 | || fixP->fx_r_type == BFD_RELOC_390_PLT32DBL | |
1643 | || fixP->fx_r_type == BFD_RELOC_390_PLT64 | |
1644 | || fixP->fx_r_type == BFD_RELOC_390_GOT12 | |
1645 | || fixP->fx_r_type == BFD_RELOC_390_GOT16 | |
1646 | || fixP->fx_r_type == BFD_RELOC_32_GOT_PCREL | |
1647 | || fixP->fx_r_type == BFD_RELOC_390_GOT64 | |
07855bec | 1648 | || fixP->fx_r_type == BFD_RELOC_390_GOTENT |
a85d7ed0 NC |
1649 | || fixP->fx_r_type == BFD_RELOC_VTABLE_INHERIT |
1650 | || fixP->fx_r_type == BFD_RELOC_VTABLE_ENTRY) | |
1651 | return 0; | |
1652 | return 1; | |
1653 | } | |
1654 | ||
b8edc45c MS |
1655 | /* Return true if we must always emit a reloc for a type and false if |
1656 | there is some hope of resolving it a assembly time. */ | |
1657 | int | |
1658 | tc_s390_force_relocation (fixp) | |
1659 | struct fix *fixp; | |
1660 | { | |
1661 | /* Ensure we emit a relocation for every reference to the global | |
1662 | offset table or to the procedure link table. */ | |
1663 | switch (fixp->fx_r_type) | |
1664 | { | |
1665 | case BFD_RELOC_390_GOT12: | |
1666 | case BFD_RELOC_32_GOT_PCREL: | |
1667 | case BFD_RELOC_32_GOTOFF: | |
1668 | case BFD_RELOC_390_GOTPC: | |
1669 | case BFD_RELOC_390_GOT16: | |
1670 | case BFD_RELOC_390_GOTPCDBL: | |
1671 | case BFD_RELOC_390_GOT64: | |
1672 | case BFD_RELOC_390_GOTENT: | |
1673 | case BFD_RELOC_390_PLT32: | |
1674 | case BFD_RELOC_390_PLT16DBL: | |
1675 | case BFD_RELOC_390_PLT32DBL: | |
1676 | case BFD_RELOC_390_PLT64: | |
1677 | case BFD_RELOC_VTABLE_INHERIT: | |
1678 | case BFD_RELOC_VTABLE_ENTRY: | |
1679 | return 1; | |
1680 | default: | |
1681 | return 0; | |
1682 | } | |
1683 | } | |
1684 | ||
a85d7ed0 NC |
1685 | /* Apply a fixup to the object code. This is called for all the |
1686 | fixups we generated by the call to fix_new_exp, above. In the call | |
1687 | above we used a reloc code which was the largest legal reloc code | |
1688 | plus the operand index. Here we undo that to recover the operand | |
1689 | index. At this point all symbol values should be fully resolved, | |
1690 | and we attempt to completely resolve the reloc. If we can not do | |
1691 | that, we determine the correct reloc code and put it back in the | |
1692 | fixup. */ | |
1693 | ||
94f592af NC |
1694 | void |
1695 | md_apply_fix3 (fixP, valP, seg) | |
1696 | fixS *fixP; | |
1697 | valueT *valP; | |
b8edc45c | 1698 | segT seg; |
a85d7ed0 NC |
1699 | { |
1700 | char *where; | |
94f592af | 1701 | valueT value = * valP; |
a85d7ed0 | 1702 | |
94f592af | 1703 | where = fixP->fx_frag->fr_literal + fixP->fx_where; |
a85d7ed0 | 1704 | |
94f592af | 1705 | if (fixP->fx_subsy != NULL) |
07855bec | 1706 | { |
94f592af NC |
1707 | if ((fixP->fx_addsy != NULL |
1708 | && S_GET_SEGMENT (fixP->fx_addsy) == S_GET_SEGMENT (fixP->fx_subsy) | |
1709 | && SEG_NORMAL (S_GET_SEGMENT (fixP->fx_addsy))) | |
1710 | || (S_GET_SEGMENT (fixP->fx_subsy) == absolute_section)) | |
1711 | value += S_GET_VALUE (fixP->fx_subsy); | |
1712 | if (!S_IS_DEFINED (fixP->fx_subsy)) | |
1713 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
07855bec | 1714 | _("unresolved fx_subsy symbol that must be resolved")); |
94f592af | 1715 | value -= S_GET_VALUE(fixP->fx_subsy); |
a85d7ed0 | 1716 | |
94f592af NC |
1717 | if (S_GET_SEGMENT (fixP->fx_subsy) == seg && ! fixP->fx_pcrel) |
1718 | value += MD_PCREL_FROM_SECTION (fixP, seg); | |
b8edc45c MS |
1719 | } |
1720 | ||
94f592af | 1721 | if (fixP->fx_addsy != NULL) |
07855bec | 1722 | { |
94f592af NC |
1723 | if ((fixP->fx_subsy != NULL |
1724 | && S_GET_SEGMENT (fixP->fx_addsy) == S_GET_SEGMENT (fixP->fx_subsy) | |
1725 | && SEG_NORMAL (S_GET_SEGMENT(fixP->fx_addsy))) | |
1726 | || (S_GET_SEGMENT (fixP->fx_addsy) == seg | |
1727 | && fixP->fx_pcrel && TC_RELOC_RTSYM_LOC_FIXUP (fixP)) | |
1728 | || (!fixP->fx_pcrel | |
1729 | && S_GET_SEGMENT (fixP->fx_addsy) == absolute_section) | |
1730 | || (S_GET_SEGMENT (fixP->fx_addsy) != undefined_section | |
1731 | && !bfd_is_com_section (S_GET_SEGMENT (fixP->fx_addsy)) | |
1732 | && TC_FIX_ADJUSTABLE(fixP))) | |
1733 | value -= S_GET_VALUE (fixP->fx_addsy); | |
1734 | ||
1735 | if (fixP->fx_pcrel) | |
1736 | value += fixP->fx_frag->fr_address + fixP->fx_where; | |
07855bec NC |
1737 | } |
1738 | else | |
94f592af | 1739 | fixP->fx_done = 1; |
a85d7ed0 | 1740 | |
94f592af | 1741 | if ((int) fixP->fx_r_type >= (int) BFD_RELOC_UNUSED) |
07855bec NC |
1742 | { |
1743 | const struct s390_operand *operand; | |
1744 | int opindex; | |
198ce79b | 1745 | |
94f592af | 1746 | opindex = (int) fixP->fx_r_type - (int) BFD_RELOC_UNUSED; |
07855bec | 1747 | operand = &s390_operands[opindex]; |
198ce79b | 1748 | |
94f592af | 1749 | if (fixP->fx_done) |
07855bec NC |
1750 | { |
1751 | /* Insert the fully resolved operand value. */ | |
1752 | s390_insert_operand (where, operand, (offsetT) value, | |
94f592af NC |
1753 | fixP->fx_file, fixP->fx_line); |
1754 | return; | |
07855bec | 1755 | } |
198ce79b | 1756 | |
07855bec NC |
1757 | /* Determine a BFD reloc value based on the operand information. |
1758 | We are only prepared to turn a few of the operands into | |
1759 | relocs. */ | |
94f592af | 1760 | fixP->fx_offset = value; |
07855bec NC |
1761 | if (operand->bits == 12 && operand->shift == 20) |
1762 | { | |
94f592af NC |
1763 | fixP->fx_size = 2; |
1764 | fixP->fx_where += 2; | |
1765 | fixP->fx_r_type = BFD_RELOC_390_12; | |
07855bec NC |
1766 | } |
1767 | else if (operand->bits == 12 && operand->shift == 36) | |
1768 | { | |
94f592af NC |
1769 | fixP->fx_size = 2; |
1770 | fixP->fx_where += 4; | |
1771 | fixP->fx_r_type = BFD_RELOC_390_12; | |
07855bec NC |
1772 | } |
1773 | else if (operand->bits == 8 && operand->shift == 8) | |
1774 | { | |
94f592af NC |
1775 | fixP->fx_size = 1; |
1776 | fixP->fx_where += 1; | |
1777 | fixP->fx_r_type = BFD_RELOC_8; | |
07855bec NC |
1778 | } |
1779 | else if (operand->bits == 16 && operand->shift == 16) | |
1780 | { | |
94f592af NC |
1781 | fixP->fx_size = 2; |
1782 | fixP->fx_where += 2; | |
07855bec NC |
1783 | if (operand->flags & S390_OPERAND_PCREL) |
1784 | { | |
94f592af NC |
1785 | fixP->fx_r_type = BFD_RELOC_390_PC16DBL; |
1786 | fixP->fx_offset += 2; | |
07855bec NC |
1787 | } |
1788 | else | |
94f592af | 1789 | fixP->fx_r_type = BFD_RELOC_16; |
07855bec | 1790 | } |
16a419ba NC |
1791 | else if (operand->bits == 32 && operand->shift == 16 |
1792 | && (operand->flags & S390_OPERAND_PCREL)) | |
07855bec | 1793 | { |
94f592af NC |
1794 | fixP->fx_size = 4; |
1795 | fixP->fx_where += 2; | |
1796 | fixP->fx_offset += 2; | |
1797 | fixP->fx_r_type = BFD_RELOC_390_PC32DBL; | |
07855bec | 1798 | } |
a85d7ed0 | 1799 | else |
07855bec NC |
1800 | { |
1801 | char *sfile; | |
1802 | unsigned int sline; | |
198ce79b | 1803 | |
07855bec NC |
1804 | /* Use expr_symbol_where to see if this is an expression |
1805 | symbol. */ | |
94f592af NC |
1806 | if (expr_symbol_where (fixP->fx_addsy, &sfile, &sline)) |
1807 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
07855bec NC |
1808 | _("unresolved expression that must be resolved")); |
1809 | else | |
94f592af | 1810 | as_bad_where (fixP->fx_file, fixP->fx_line, |
07855bec | 1811 | _("unsupported relocation type")); |
94f592af NC |
1812 | fixP->fx_done = 1; |
1813 | return; | |
07855bec | 1814 | } |
a85d7ed0 | 1815 | } |
07855bec NC |
1816 | else |
1817 | { | |
94f592af | 1818 | switch (fixP->fx_r_type) |
07855bec NC |
1819 | { |
1820 | case BFD_RELOC_8: | |
94f592af | 1821 | if (fixP->fx_pcrel) |
07855bec | 1822 | abort (); |
94f592af | 1823 | if (fixP->fx_done) |
07855bec NC |
1824 | md_number_to_chars (where, value, 1); |
1825 | break; | |
1826 | case BFD_RELOC_390_12: | |
1827 | case BFD_RELOC_390_GOT12: | |
94f592af | 1828 | if (fixP->fx_done) |
07855bec NC |
1829 | { |
1830 | unsigned short mop; | |
1831 | ||
1832 | mop = bfd_getb16 ((unsigned char *) where); | |
1833 | mop |= (unsigned short) (value & 0xfff); | |
1834 | bfd_putb16 ((bfd_vma) mop, (unsigned char *) where); | |
198ce79b | 1835 | } |
07855bec | 1836 | break; |
198ce79b | 1837 | |
07855bec NC |
1838 | case BFD_RELOC_16: |
1839 | case BFD_RELOC_GPREL16: | |
1840 | case BFD_RELOC_16_GOT_PCREL: | |
1841 | case BFD_RELOC_16_GOTOFF: | |
94f592af NC |
1842 | if (fixP->fx_pcrel) |
1843 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
07855bec | 1844 | "cannot emit PC relative %s relocation%s%s", |
94f592af NC |
1845 | bfd_get_reloc_code_name (fixP->fx_r_type), |
1846 | fixP->fx_addsy != NULL ? " against " : "", | |
1847 | (fixP->fx_addsy != NULL | |
1848 | ? S_GET_NAME (fixP->fx_addsy) | |
07855bec | 1849 | : "")); |
94f592af | 1850 | if (fixP->fx_done) |
07855bec NC |
1851 | md_number_to_chars (where, value, 2); |
1852 | break; | |
1853 | case BFD_RELOC_390_GOT16: | |
94f592af | 1854 | if (fixP->fx_done) |
07855bec NC |
1855 | md_number_to_chars (where, value, 2); |
1856 | break; | |
1857 | case BFD_RELOC_390_PC16DBL: | |
1858 | case BFD_RELOC_390_PLT16DBL: | |
1859 | value += 2; | |
94f592af | 1860 | if (fixP->fx_done) |
07855bec NC |
1861 | md_number_to_chars (where, (offsetT) value >> 1, 2); |
1862 | break; | |
1863 | ||
1864 | case BFD_RELOC_32: | |
94f592af NC |
1865 | if (fixP->fx_pcrel) |
1866 | fixP->fx_r_type = BFD_RELOC_32_PCREL; | |
07855bec | 1867 | else |
94f592af NC |
1868 | fixP->fx_r_type = BFD_RELOC_32; |
1869 | if (fixP->fx_done) | |
07855bec NC |
1870 | md_number_to_chars (where, value, 4); |
1871 | break; | |
1872 | case BFD_RELOC_32_PCREL: | |
1873 | case BFD_RELOC_32_BASEREL: | |
94f592af NC |
1874 | fixP->fx_r_type = BFD_RELOC_32_PCREL; |
1875 | if (fixP->fx_done) | |
07855bec NC |
1876 | md_number_to_chars (where, value, 4); |
1877 | break; | |
1878 | case BFD_RELOC_32_GOT_PCREL: | |
1879 | case BFD_RELOC_390_PLT32: | |
94f592af | 1880 | if (fixP->fx_done) |
07855bec NC |
1881 | md_number_to_chars (where, value, 4); |
1882 | break; | |
1883 | case BFD_RELOC_390_PC32DBL: | |
1884 | case BFD_RELOC_390_PLT32DBL: | |
1885 | case BFD_RELOC_390_GOTPCDBL: | |
1886 | case BFD_RELOC_390_GOTENT: | |
1887 | value += 2; | |
94f592af | 1888 | if (fixP->fx_done) |
07855bec NC |
1889 | md_number_to_chars (where, (offsetT) value >> 1, 4); |
1890 | break; | |
1891 | ||
1892 | case BFD_RELOC_32_GOTOFF: | |
94f592af | 1893 | if (fixP->fx_done) |
07726851 | 1894 | md_number_to_chars (where, value, sizeof (int)); |
07855bec NC |
1895 | break; |
1896 | ||
1897 | case BFD_RELOC_390_GOT64: | |
1898 | case BFD_RELOC_390_PLT64: | |
94f592af | 1899 | if (fixP->fx_done) |
07855bec NC |
1900 | md_number_to_chars (where, value, 8); |
1901 | break; | |
1902 | ||
1903 | case BFD_RELOC_64: | |
94f592af NC |
1904 | if (fixP->fx_pcrel) |
1905 | fixP->fx_r_type = BFD_RELOC_64_PCREL; | |
07855bec | 1906 | else |
94f592af NC |
1907 | fixP->fx_r_type = BFD_RELOC_64; |
1908 | if (fixP->fx_done) | |
07855bec NC |
1909 | md_number_to_chars (where, value, 8); |
1910 | break; | |
1911 | ||
1912 | case BFD_RELOC_64_PCREL: | |
94f592af NC |
1913 | fixP->fx_r_type = BFD_RELOC_64_PCREL; |
1914 | if (fixP->fx_done) | |
07855bec NC |
1915 | md_number_to_chars (where, value, 8); |
1916 | break; | |
1917 | ||
1918 | case BFD_RELOC_VTABLE_INHERIT: | |
1919 | case BFD_RELOC_VTABLE_ENTRY: | |
94f592af NC |
1920 | fixP->fx_done = 0; |
1921 | return; | |
07855bec NC |
1922 | |
1923 | default: | |
1924 | { | |
94f592af | 1925 | const char *reloc_name = bfd_get_reloc_code_name (fixP->fx_r_type); |
198ce79b | 1926 | |
07855bec NC |
1927 | if (reloc_name != NULL) |
1928 | fprintf (stderr, "Gas failure, reloc type %s\n", reloc_name); | |
1929 | else | |
94f592af | 1930 | fprintf (stderr, "Gas failure, reloc type #%i\n", fixP->fx_r_type); |
07855bec NC |
1931 | fflush (stderr); |
1932 | abort (); | |
1933 | } | |
1934 | } | |
a85d7ed0 | 1935 | |
94f592af | 1936 | fixP->fx_offset = value; |
07855bec | 1937 | } |
a85d7ed0 NC |
1938 | } |
1939 | ||
1940 | /* Generate a reloc for a fixup. */ | |
1941 | ||
1942 | arelent * | |
1943 | tc_gen_reloc (seg, fixp) | |
1944 | asection *seg ATTRIBUTE_UNUSED; | |
1945 | fixS *fixp; | |
1946 | { | |
1947 | bfd_reloc_code_real_type code; | |
1948 | arelent *reloc; | |
1949 | ||
1950 | code = fixp->fx_r_type; | |
07855bec NC |
1951 | if (GOT_symbol && fixp->fx_addsy == GOT_symbol) |
1952 | { | |
16a419ba NC |
1953 | if ( (s390_arch_size == 32 && code == BFD_RELOC_32_PCREL) |
1954 | || (s390_arch_size == 64 && code == BFD_RELOC_64_PCREL)) | |
07855bec NC |
1955 | code = BFD_RELOC_390_GOTPC; |
1956 | if (code == BFD_RELOC_390_PC32DBL) | |
1957 | code = BFD_RELOC_390_GOTPCDBL; | |
1958 | } | |
a85d7ed0 NC |
1959 | |
1960 | reloc = (arelent *) xmalloc (sizeof (arelent)); | |
1961 | reloc->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *)); | |
1962 | *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy); | |
1963 | reloc->address = fixp->fx_frag->fr_address + fixp->fx_where; | |
1964 | reloc->howto = bfd_reloc_type_lookup (stdoutput, code); | |
1965 | if (reloc->howto == NULL) | |
1966 | { | |
1967 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
1968 | _("cannot represent relocation type %s"), | |
1969 | bfd_get_reloc_code_name (code)); | |
1970 | /* Set howto to a garbage value so that we can keep going. */ | |
1971 | reloc->howto = bfd_reloc_type_lookup (stdoutput, BFD_RELOC_32); | |
1972 | assert (reloc->howto != NULL); | |
1973 | } | |
1974 | reloc->addend = fixp->fx_offset; | |
1975 | ||
1976 | return reloc; | |
1977 | } |