1 /* This module handles expression trees.
2 Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
3 2001, 2002, 2003, 2004, 2005
4 Free Software Foundation, Inc.
5 Written by Steve Chamberlain of Cygnus Support <sac@cygnus.com>.
7 This file is part of GLD, the Gnu Linker.
9 GLD is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2, or (at your option)
14 GLD is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with GLD; see the file COPYING. If not, write to the Free
21 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
24 /* This module is in charge of working out the contents of expressions.
26 It has to keep track of the relative/absness of a symbol etc. This
27 is done by keeping all values in a struct (an etree_value_type)
28 which contains a value, a section to which it is relative and a
41 #include "libiberty.h"
42 #include "safe-ctype.h"
44 static etree_value_type exp_fold_tree_no_dot
45 (etree_type *, lang_output_section_statement_type *, lang_phase_type);
46 static bfd_vma align_n
49 struct exp_data_seg exp_data_seg;
51 segment_type *segments;
53 /* Principally used for diagnostics. */
54 static bfd_boolean assigning_to_dot = FALSE;
56 /* Print the string representation of the given token. Surround it
57 with spaces if INFIX_P is TRUE. */
60 exp_print_token (token_code_type code, int infix_p)
94 { SECTIONS, "SECTIONS" },
95 { SIZEOF_HEADERS, "SIZEOF_HEADERS" },
97 { DEFINED, "DEFINED" },
98 { TARGET_K, "TARGET" },
99 { SEARCH_DIR, "SEARCH_DIR" },
103 { SIZEOF, "SIZEOF" },
105 { LOADADDR, "LOADADDR" },
107 { REL, "relocatable" },
108 { DATA_SEGMENT_ALIGN, "DATA_SEGMENT_ALIGN" },
109 { DATA_SEGMENT_RELRO_END, "DATA_SEGMENT_RELRO_END" },
110 { DATA_SEGMENT_END, "DATA_SEGMENT_END" },
111 { ORIGIN, "ORIGIN" },
112 { LENGTH, "LENGTH" },
113 { SEGMENT_START, "SEGMENT_START" }
117 for (idx = 0; idx < ARRAY_SIZE (table); idx++)
118 if (table[idx].code == code)
122 fputc (' ', config.map_file);
124 if (idx < ARRAY_SIZE (table))
125 fputs (table[idx].name, config.map_file);
127 fputc (code, config.map_file);
129 fprintf (config.map_file, "<code %d>", code);
132 fputc (' ', config.map_file);
136 make_abs (etree_value_type *ptr)
138 asection *s = ptr->section->bfd_section;
139 ptr->value += s->vma;
140 ptr->section = abs_output_section;
143 static etree_value_type
144 new_abs (bfd_vma value)
146 etree_value_type new;
148 new.section = abs_output_section;
155 exp_intop (bfd_vma value)
157 etree_type *new = stat_alloc (sizeof (new->value));
158 new->type.node_code = INT;
159 new->value.value = value;
160 new->value.str = NULL;
161 new->type.node_class = etree_value;
166 exp_bigintop (bfd_vma value, char *str)
168 etree_type *new = stat_alloc (sizeof (new->value));
169 new->type.node_code = INT;
170 new->value.value = value;
171 new->value.str = str;
172 new->type.node_class = etree_value;
176 /* Build an expression representing an unnamed relocatable value. */
179 exp_relop (asection *section, bfd_vma value)
181 etree_type *new = stat_alloc (sizeof (new->rel));
182 new->type.node_code = REL;
183 new->type.node_class = etree_rel;
184 new->rel.section = section;
185 new->rel.value = value;
189 static etree_value_type
190 new_rel (bfd_vma value,
192 lang_output_section_statement_type *section)
194 etree_value_type new;
198 new.section = section;
202 static etree_value_type
203 new_rel_from_section (bfd_vma value,
204 lang_output_section_statement_type *section)
206 etree_value_type new;
210 new.section = section;
212 new.value -= section->bfd_section->vma;
217 static etree_value_type
218 fold_unary (etree_type *tree,
219 lang_output_section_statement_type *current_section,
220 lang_phase_type allocation_done,
224 etree_value_type result;
226 result = exp_fold_tree (tree->unary.child,
228 allocation_done, dot, dotp);
231 switch (tree->type.node_code)
234 if (allocation_done != lang_first_phase_enum)
235 result = new_rel_from_section (align_n (dot, result.value),
238 result.valid_p = FALSE;
242 if (allocation_done != lang_first_phase_enum)
244 result.value += result.section->bfd_section->vma;
245 result.section = abs_output_section;
248 result.valid_p = FALSE;
253 result.value = ~result.value;
258 result.value = !result.value;
263 result.value = -result.value;
267 /* Return next place aligned to value. */
268 if (allocation_done == lang_allocating_phase_enum)
271 result.value = align_n (dot, result.value);
274 result.valid_p = FALSE;
277 case DATA_SEGMENT_END:
278 if (allocation_done != lang_first_phase_enum
279 && current_section == abs_output_section
280 && (exp_data_seg.phase == exp_dataseg_align_seen
281 || exp_data_seg.phase == exp_dataseg_relro_seen
282 || exp_data_seg.phase == exp_dataseg_adjust
283 || exp_data_seg.phase == exp_dataseg_relro_adjust
284 || allocation_done != lang_allocating_phase_enum))
286 if (exp_data_seg.phase == exp_dataseg_align_seen
287 || exp_data_seg.phase == exp_dataseg_relro_seen)
289 exp_data_seg.phase = exp_dataseg_end_seen;
290 exp_data_seg.end = result.value;
294 result.valid_p = FALSE;
306 static etree_value_type
307 fold_binary (etree_type *tree,
308 lang_output_section_statement_type *current_section,
309 lang_phase_type allocation_done,
313 etree_value_type result;
315 result = exp_fold_tree (tree->binary.lhs, current_section,
316 allocation_done, dot, dotp);
318 /* The SEGMENT_START operator is special because its first
319 operand is a string, not the name of a symbol. */
320 if (result.valid_p && tree->type.node_code == SEGMENT_START)
322 const char *segment_name;
324 /* Check to see if the user has overridden the default
326 segment_name = tree->binary.rhs->name.name;
327 for (seg = segments; seg; seg = seg->next)
328 if (strcmp (seg->name, segment_name) == 0)
331 result.value = seg->value;
333 result.section = NULL;
337 else if (result.valid_p)
339 etree_value_type other;
341 other = exp_fold_tree (tree->binary.rhs,
343 allocation_done, dot, dotp);
346 /* If the values are from different sections, or this is an
347 absolute expression, make both the source arguments
348 absolute. However, adding or subtracting an absolute
349 value from a relative value is meaningful, and is an
351 if (current_section != abs_output_section
352 && (other.section == abs_output_section
353 || (result.section == abs_output_section
354 && tree->type.node_code == '+'))
355 && (tree->type.node_code == '+'
356 || tree->type.node_code == '-'))
358 if (other.section != abs_output_section)
360 /* Keep the section of the other term. */
361 if (tree->type.node_code == '+')
362 other.value = result.value + other.value;
364 other.value = result.value - other.value;
368 else if (result.section != other.section
369 || current_section == abs_output_section)
375 switch (tree->type.node_code)
378 if (other.value == 0)
379 einfo (_("%F%S %% by zero\n"));
380 result.value = ((bfd_signed_vma) result.value
381 % (bfd_signed_vma) other.value);
385 if (other.value == 0)
386 einfo (_("%F%S / by zero\n"));
387 result.value = ((bfd_signed_vma) result.value
388 / (bfd_signed_vma) other.value);
391 #define BOP(x,y) case x : result.value = result.value y other.value; break;
410 if (result.value < other.value)
415 if (result.value > other.value)
420 result.value = align_n (result.value, other.value);
423 case DATA_SEGMENT_ALIGN:
424 if (allocation_done != lang_first_phase_enum
425 && current_section == abs_output_section
426 && (exp_data_seg.phase == exp_dataseg_none
427 || exp_data_seg.phase == exp_dataseg_adjust
428 || exp_data_seg.phase == exp_dataseg_relro_adjust
429 || allocation_done != lang_allocating_phase_enum))
431 bfd_vma maxpage = result.value;
433 result.value = align_n (dot, maxpage);
434 if (exp_data_seg.phase == exp_dataseg_relro_adjust)
435 result.value = exp_data_seg.base;
436 else if (exp_data_seg.phase != exp_dataseg_adjust)
438 result.value += dot & (maxpage - 1);
439 if (allocation_done == lang_allocating_phase_enum)
441 exp_data_seg.phase = exp_dataseg_align_seen;
442 exp_data_seg.min_base = align_n (dot, maxpage);
443 exp_data_seg.base = result.value;
444 exp_data_seg.pagesize = other.value;
445 exp_data_seg.maxpagesize = maxpage;
446 exp_data_seg.relro_end = 0;
449 else if (other.value < maxpage)
450 result.value += (dot + other.value - 1)
451 & (maxpage - other.value);
454 result.valid_p = FALSE;
457 case DATA_SEGMENT_RELRO_END:
458 if (allocation_done != lang_first_phase_enum
459 && (exp_data_seg.phase == exp_dataseg_align_seen
460 || exp_data_seg.phase == exp_dataseg_adjust
461 || exp_data_seg.phase == exp_dataseg_relro_adjust
462 || allocation_done != lang_allocating_phase_enum))
464 if (exp_data_seg.phase == exp_dataseg_align_seen
465 || exp_data_seg.phase == exp_dataseg_relro_adjust)
466 exp_data_seg.relro_end
467 = result.value + other.value;
468 if (exp_data_seg.phase == exp_dataseg_relro_adjust
469 && (exp_data_seg.relro_end
470 & (exp_data_seg.pagesize - 1)))
472 exp_data_seg.relro_end += exp_data_seg.pagesize - 1;
473 exp_data_seg.relro_end &= ~(exp_data_seg.pagesize - 1);
474 result.value = exp_data_seg.relro_end - other.value;
476 if (exp_data_seg.phase == exp_dataseg_align_seen)
477 exp_data_seg.phase = exp_dataseg_relro_seen;
480 result.valid_p = FALSE;
489 result.valid_p = FALSE;
496 static etree_value_type
497 fold_trinary (etree_type *tree,
498 lang_output_section_statement_type *current_section,
499 lang_phase_type allocation_done,
503 etree_value_type result;
505 result = exp_fold_tree (tree->trinary.cond, current_section,
506 allocation_done, dot, dotp);
508 result = exp_fold_tree ((result.value
510 : tree->trinary.rhs),
512 allocation_done, dot, dotp);
517 static etree_value_type
518 fold_name (etree_type *tree,
519 lang_output_section_statement_type *current_section,
520 lang_phase_type allocation_done,
523 etree_value_type result;
525 result.valid_p = FALSE;
527 switch (tree->type.node_code)
530 if (allocation_done != lang_first_phase_enum)
531 result = new_abs (bfd_sizeof_headers (output_bfd,
532 link_info.relocatable));
535 if (allocation_done == lang_first_phase_enum)
536 lang_track_definedness (tree->name.name);
539 struct bfd_link_hash_entry *h;
541 = lang_symbol_definition_iteration (tree->name.name);
543 h = bfd_wrapped_link_hash_lookup (output_bfd, &link_info,
546 result.value = (h != NULL
547 && (h->type == bfd_link_hash_defined
548 || h->type == bfd_link_hash_defweak
549 || h->type == bfd_link_hash_common)
550 && (def_iteration == lang_statement_iteration
551 || def_iteration == -1));
552 result.section = abs_output_section;
553 result.valid_p = TRUE;
557 if (tree->name.name[0] == '.' && tree->name.name[1] == 0)
559 if (allocation_done != lang_first_phase_enum)
560 result = new_rel_from_section (dot, current_section);
562 else if (allocation_done != lang_first_phase_enum)
564 struct bfd_link_hash_entry *h;
566 h = bfd_wrapped_link_hash_lookup (output_bfd, &link_info,
570 einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n"));
571 else if (h->type == bfd_link_hash_defined
572 || h->type == bfd_link_hash_defweak)
574 if (bfd_is_abs_section (h->u.def.section))
575 result = new_abs (h->u.def.value);
576 else if (allocation_done == lang_final_phase_enum
577 || allocation_done == lang_allocating_phase_enum)
579 asection *output_section;
581 output_section = h->u.def.section->output_section;
582 if (output_section == NULL)
583 einfo (_("%X%S: unresolvable symbol `%s' referenced in expression\n"),
587 lang_output_section_statement_type *os;
589 os = (lang_output_section_statement_lookup
590 (bfd_get_section_name (output_bfd,
593 /* FIXME: Is this correct if this section is
594 being linked with -R? */
595 result = new_rel ((h->u.def.value
596 + h->u.def.section->output_offset),
602 else if (allocation_done == lang_final_phase_enum
604 einfo (_("%F%S: undefined symbol `%s' referenced in expression\n"),
606 else if (h->type == bfd_link_hash_new)
608 h->type = bfd_link_hash_undefined;
609 h->u.undef.abfd = NULL;
610 if (h->u.undef.next == NULL && h != link_info.hash->undefs_tail)
611 bfd_link_add_undef (link_info.hash, h);
617 if (allocation_done != lang_first_phase_enum)
619 lang_output_section_statement_type *os;
621 os = lang_output_section_find (tree->name.name);
622 if (os && os->processed > 0)
623 result = new_rel (0, NULL, os);
628 if (allocation_done != lang_first_phase_enum)
630 lang_output_section_statement_type *os;
632 os = lang_output_section_find (tree->name.name);
633 if (os && os->processed != 0)
635 if (os->load_base == NULL)
636 result = new_rel (0, NULL, os);
638 result = exp_fold_tree_no_dot (os->load_base,
646 if (allocation_done != lang_first_phase_enum)
648 int opb = bfd_octets_per_byte (output_bfd);
649 lang_output_section_statement_type *os;
651 os = lang_output_section_find (tree->name.name);
652 if (os && os->processed > 0)
653 result = new_abs (os->bfd_section->size / opb);
659 lang_memory_region_type *mem;
661 mem = lang_memory_region_lookup (tree->name.name, FALSE);
663 result = new_abs (mem->length);
665 einfo (_("%F%S: undefined MEMORY region `%s' referenced in expression\n"),
672 lang_memory_region_type *mem;
674 mem = lang_memory_region_lookup (tree->name.name, FALSE);
676 result = new_abs (mem->origin);
678 einfo (_("%F%S: undefined MEMORY region `%s' referenced in expression\n"),
692 exp_fold_tree (etree_type *tree,
693 lang_output_section_statement_type *current_section,
694 lang_phase_type allocation_done,
698 etree_value_type result;
702 memset (&result, 0, sizeof (result));
706 switch (tree->type.node_class)
709 result = new_rel (tree->value.value, tree->value.str, current_section);
713 if (allocation_done != lang_final_phase_enum)
714 memset (&result, 0, sizeof (result));
716 result = new_rel ((tree->rel.value
717 + tree->rel.section->output_section->vma
718 + tree->rel.section->output_offset),
724 result = exp_fold_tree (tree->assert_s.child,
726 allocation_done, dot, dotp);
727 if (result.valid_p && !result.value)
728 einfo ("%X%P: %s\n", tree->assert_s.message);
732 result = fold_unary (tree, current_section, allocation_done,
737 result = fold_binary (tree, current_section, allocation_done,
742 result = fold_trinary (tree, current_section, allocation_done,
749 if (tree->assign.dst[0] == '.' && tree->assign.dst[1] == 0)
751 /* Assignment to dot can only be done during allocation. */
752 if (tree->type.node_class != etree_assign)
753 einfo (_("%F%S can not PROVIDE assignment to location counter\n"));
754 if (allocation_done == lang_allocating_phase_enum
755 || (allocation_done == lang_final_phase_enum
756 && current_section == abs_output_section))
758 /* Notify the folder that this is an assignment to dot. */
759 assigning_to_dot = TRUE;
760 result = exp_fold_tree (tree->assign.src,
762 allocation_done, dot, dotp);
763 assigning_to_dot = FALSE;
765 if (! result.valid_p)
766 einfo (_("%F%S invalid assignment to location counter\n"));
769 if (current_section == NULL)
770 einfo (_("%F%S assignment to location counter invalid outside of SECTION\n"));
775 nextdot = (result.value
776 + current_section->bfd_section->vma);
778 && current_section != abs_output_section)
779 einfo (_("%F%S cannot move location counter backwards (from %V to %V)\n"),
787 memset (&result, 0, sizeof (result));
791 result = exp_fold_tree (tree->assign.src,
792 current_section, allocation_done,
797 struct bfd_link_hash_entry *h;
799 if (tree->type.node_class == etree_assign)
803 h = bfd_link_hash_lookup (link_info.hash, tree->assign.dst,
804 create, FALSE, TRUE);
808 einfo (_("%P%F:%s: hash creation failed\n"),
811 else if (tree->type.node_class == etree_provide
812 && h->type != bfd_link_hash_new
813 && h->type != bfd_link_hash_undefined
814 && h->type != bfd_link_hash_common)
816 /* Do nothing. The symbol was defined by some
821 /* FIXME: Should we worry if the symbol is already
823 lang_update_definedness (tree->assign.dst, h);
824 h->type = bfd_link_hash_defined;
825 h->u.def.value = result.value;
826 h->u.def.section = result.section->bfd_section;
827 if (tree->type.node_class == etree_provide)
828 tree->type.node_class = etree_provided;
835 result = fold_name (tree, current_section, allocation_done, dot);
840 memset (&result, 0, sizeof (result));
847 static etree_value_type
848 exp_fold_tree_no_dot (etree_type *tree,
849 lang_output_section_statement_type *current_section,
850 lang_phase_type allocation_done)
852 return exp_fold_tree (tree, current_section, allocation_done, 0, NULL);
856 exp_binop (int code, etree_type *lhs, etree_type *rhs)
858 etree_type value, *new;
861 value.type.node_code = code;
862 value.binary.lhs = lhs;
863 value.binary.rhs = rhs;
864 value.type.node_class = etree_binary;
865 r = exp_fold_tree_no_dot (&value,
867 lang_first_phase_enum);
870 return exp_intop (r.value);
872 new = stat_alloc (sizeof (new->binary));
873 memcpy (new, &value, sizeof (new->binary));
878 exp_trinop (int code, etree_type *cond, etree_type *lhs, etree_type *rhs)
880 etree_type value, *new;
882 value.type.node_code = code;
883 value.trinary.lhs = lhs;
884 value.trinary.cond = cond;
885 value.trinary.rhs = rhs;
886 value.type.node_class = etree_trinary;
887 r = exp_fold_tree_no_dot (&value, NULL, lang_first_phase_enum);
889 return exp_intop (r.value);
891 new = stat_alloc (sizeof (new->trinary));
892 memcpy (new, &value, sizeof (new->trinary));
897 exp_unop (int code, etree_type *child)
899 etree_type value, *new;
902 value.unary.type.node_code = code;
903 value.unary.child = child;
904 value.unary.type.node_class = etree_unary;
905 r = exp_fold_tree_no_dot (&value, abs_output_section,
906 lang_first_phase_enum);
908 return exp_intop (r.value);
910 new = stat_alloc (sizeof (new->unary));
911 memcpy (new, &value, sizeof (new->unary));
916 exp_nameop (int code, const char *name)
918 etree_type value, *new;
920 value.name.type.node_code = code;
921 value.name.name = name;
922 value.name.type.node_class = etree_name;
924 r = exp_fold_tree_no_dot (&value, NULL, lang_first_phase_enum);
926 return exp_intop (r.value);
928 new = stat_alloc (sizeof (new->name));
929 memcpy (new, &value, sizeof (new->name));
935 exp_assop (int code, const char *dst, etree_type *src)
937 etree_type value, *new;
939 value.assign.type.node_code = code;
941 value.assign.src = src;
942 value.assign.dst = dst;
943 value.assign.type.node_class = etree_assign;
945 new = stat_alloc (sizeof (new->assign));
946 memcpy (new, &value, sizeof (new->assign));
950 /* Handle PROVIDE. */
953 exp_provide (const char *dst, etree_type *src)
957 n = stat_alloc (sizeof (n->assign));
958 n->assign.type.node_code = '=';
959 n->assign.type.node_class = etree_provide;
968 exp_assert (etree_type *exp, const char *message)
972 n = stat_alloc (sizeof (n->assert_s));
973 n->assert_s.type.node_code = '!';
974 n->assert_s.type.node_class = etree_assert;
975 n->assert_s.child = exp;
976 n->assert_s.message = message;
981 exp_print_tree (etree_type *tree)
983 if (config.map_file == NULL)
984 config.map_file = stderr;
988 minfo ("NULL TREE\n");
992 switch (tree->type.node_class)
995 minfo ("0x%v", tree->value.value);
998 if (tree->rel.section->owner != NULL)
999 minfo ("%B:", tree->rel.section->owner);
1000 minfo ("%s+0x%v", tree->rel.section->name, tree->rel.value);
1003 fprintf (config.map_file, "%s", tree->assign.dst);
1004 exp_print_token (tree->type.node_code, TRUE);
1005 exp_print_tree (tree->assign.src);
1008 case etree_provided:
1009 fprintf (config.map_file, "PROVIDE (%s, ", tree->assign.dst);
1010 exp_print_tree (tree->assign.src);
1011 fprintf (config.map_file, ")");
1014 fprintf (config.map_file, "(");
1015 exp_print_tree (tree->binary.lhs);
1016 exp_print_token (tree->type.node_code, TRUE);
1017 exp_print_tree (tree->binary.rhs);
1018 fprintf (config.map_file, ")");
1021 exp_print_tree (tree->trinary.cond);
1022 fprintf (config.map_file, "?");
1023 exp_print_tree (tree->trinary.lhs);
1024 fprintf (config.map_file, ":");
1025 exp_print_tree (tree->trinary.rhs);
1028 exp_print_token (tree->unary.type.node_code, FALSE);
1029 if (tree->unary.child)
1031 fprintf (config.map_file, " (");
1032 exp_print_tree (tree->unary.child);
1033 fprintf (config.map_file, ")");
1038 fprintf (config.map_file, "ASSERT (");
1039 exp_print_tree (tree->assert_s.child);
1040 fprintf (config.map_file, ", %s)", tree->assert_s.message);
1044 fprintf (config.map_file, "????????");
1047 if (tree->type.node_code == NAME)
1049 fprintf (config.map_file, "%s", tree->name.name);
1053 exp_print_token (tree->type.node_code, FALSE);
1054 if (tree->name.name)
1055 fprintf (config.map_file, " (%s)", tree->name.name);
1065 exp_get_vma (etree_type *tree,
1068 lang_phase_type allocation_done)
1074 r = exp_fold_tree_no_dot (tree, abs_output_section, allocation_done);
1075 if (! r.valid_p && name != NULL)
1076 einfo (_("%F%S nonconstant expression for %s\n"), name);
1084 exp_get_value_int (etree_type *tree,
1087 lang_phase_type allocation_done)
1089 return exp_get_vma (tree, def, name, allocation_done);
1093 exp_get_fill (etree_type *tree,
1096 lang_phase_type allocation_done)
1106 r = exp_fold_tree_no_dot (tree, abs_output_section, allocation_done);
1107 if (! r.valid_p && name != NULL)
1108 einfo (_("%F%S nonconstant expression for %s\n"), name);
1110 if (r.str != NULL && (len = strlen (r.str)) != 0)
1114 fill = xmalloc ((len + 1) / 2 + sizeof (*fill) - 1);
1115 fill->size = (len + 1) / 2;
1117 s = (unsigned char *) r.str;
1125 digit = (digit - 'A' + '0' + 10) & 0xf;
1139 fill = xmalloc (4 + sizeof (*fill) - 1);
1141 fill->data[0] = (val >> 24) & 0xff;
1142 fill->data[1] = (val >> 16) & 0xff;
1143 fill->data[2] = (val >> 8) & 0xff;
1144 fill->data[3] = (val >> 0) & 0xff;
1151 exp_get_abs_int (etree_type *tree,
1152 int def ATTRIBUTE_UNUSED,
1154 lang_phase_type allocation_done)
1156 etree_value_type res;
1157 res = exp_fold_tree_no_dot (tree, abs_output_section, allocation_done);
1160 res.value += res.section->bfd_section->vma;
1162 einfo (_("%F%S non constant expression for %s\n"), name);
1168 align_n (bfd_vma value, bfd_vma align)
1173 value = (value + align - 1) / align;
1174 return value * align;