diff options
Diffstat (limited to 'ld/ldlang.c')
| -rw-r--r-- | ld/ldlang.c | 188 |
1 files changed, 114 insertions, 74 deletions
diff --git a/ld/ldlang.c b/ld/ldlang.c index 4e75624..2ecf62f 100644 --- a/ld/ldlang.c +++ b/ld/ldlang.c @@ -5247,7 +5247,7 @@ lang_size_sections_1 } expld.dataseg.relro = exp_dataseg_relro_none; - /* This symbol is relative to this section. */ + /* This symbol may be relative to this section. */ if ((tree->type.node_class == etree_provided || tree->type.node_class == etree_assign) && (tree->assign.dst [0] != '.' @@ -5466,13 +5466,18 @@ lang_size_sections (bfd_boolean *relax, bfd_boolean check_regions) expld.dataseg.phase = exp_dataseg_done; } +static lang_output_section_statement_type *current_section; +static lang_assignment_statement_type *current_assign; +static bfd_boolean prefer_next_section; + /* Worker function for lang_do_assignments. Recursiveness goes here. */ static bfd_vma lang_do_assignments_1 (lang_statement_union_type *s, lang_output_section_statement_type *current_os, fill_type *fill, - bfd_vma dot) + bfd_vma dot, + bfd_boolean *found_end) { for (; s != NULL; s = s->header.next) { @@ -5480,7 +5485,7 @@ lang_do_assignments_1 (lang_statement_union_type *s, { case lang_constructors_statement_enum: dot = lang_do_assignments_1 (constructor_list.head, - current_os, fill, dot); + current_os, fill, dot, found_end); break; case lang_output_section_statement_enum: @@ -5488,11 +5493,18 @@ lang_do_assignments_1 (lang_statement_union_type *s, lang_output_section_statement_type *os; os = &(s->output_section_statement); + os->after_end = *found_end; if (os->bfd_section != NULL && !os->ignored) { + if ((os->bfd_section->flags & SEC_ALLOC) != 0) + { + current_section = os; + prefer_next_section = FALSE; + } dot = os->bfd_section->vma; - lang_do_assignments_1 (os->children.head, os, os->fill, dot); + lang_do_assignments_1 (os->children.head, + os, os->fill, dot, found_end); /* .tbss sections effectively have zero size. */ if ((os->bfd_section->flags & SEC_HAS_CONTENTS) != 0 @@ -5509,7 +5521,7 @@ lang_do_assignments_1 (lang_statement_union_type *s, case lang_wild_statement_enum: dot = lang_do_assignments_1 (s->wild_statement.children.head, - current_os, fill, dot); + current_os, fill, dot, found_end); break; case lang_object_symbols_statement_enum: @@ -5580,6 +5592,19 @@ lang_do_assignments_1 (lang_statement_union_type *s, break; case lang_assignment_statement_enum: + current_assign = &s->assignment_statement; + if (current_assign->exp->type.node_class != etree_assert) + { + const char *p = current_assign->exp->assign.dst; + + if (current_os == abs_output_section && p[0] == '.' && p[1] == 0) + prefer_next_section = TRUE; + + while (*p == '_') + ++p; + if (strcmp (p, "end") == 0) + *found_end = TRUE; + } exp_fold_tree (s->assignment_statement.exp, current_os->bfd_section, &dot); @@ -5591,7 +5616,7 @@ lang_do_assignments_1 (lang_statement_union_type *s, case lang_group_statement_enum: dot = lang_do_assignments_1 (s->group_statement.children.head, - current_os, fill, dot); + current_os, fill, dot, found_end); break; case lang_insert_statement_enum: @@ -5611,9 +5636,89 @@ lang_do_assignments_1 (lang_statement_union_type *s, void lang_do_assignments (lang_phase_type phase) { + bfd_boolean found_end = FALSE; + + current_section = NULL; + prefer_next_section = FALSE; expld.phase = phase; lang_statement_iteration++; - lang_do_assignments_1 (statement_list.head, abs_output_section, NULL, 0); + lang_do_assignments_1 (statement_list.head, + abs_output_section, NULL, 0, &found_end); +} + +/* For an assignment statement outside of an output section statement, + choose the best of neighbouring output sections to use for values + of "dot". */ + +asection * +section_for_dot (void) +{ + asection *s; + + /* Assignments belong to the previous output section, unless there + has been an assignment to "dot", in which case following + assignments belong to the next output section. (The assumption + is that an assignment to "dot" is setting up the address for the + next output section.) Except that past the assignment to "_end" + we always associate with the previous section. This exception is + for targets like SH that define an alloc .stack or other + weirdness after non-alloc sections. */ + if (current_section == NULL || prefer_next_section) + { + lang_statement_union_type *stmt; + lang_output_section_statement_type *os; + + for (stmt = (lang_statement_union_type *) current_assign; + stmt != NULL; + stmt = stmt->header.next) + if (stmt->header.type == lang_output_section_statement_enum) + break; + + os = &stmt->output_section_statement; + while (os != NULL + && !os->after_end + && (os->bfd_section == NULL + || (os->bfd_section->flags & SEC_EXCLUDE) != 0 + || bfd_section_removed_from_list (link_info.output_bfd, + os->bfd_section))) + os = os->next; + + if (current_section == NULL || os == NULL || !os->after_end) + { + if (os != NULL) + s = os->bfd_section; + else + s = link_info.output_bfd->section_last; + while (s != NULL + && ((s->flags & SEC_ALLOC) == 0 + || (s->flags & SEC_THREAD_LOCAL) != 0)) + s = s->prev; + if (s != NULL) + return s; + + return bfd_abs_section_ptr; + } + } + + s = current_section->bfd_section; + + /* The section may have been stripped. */ + while (s != NULL + && ((s->flags & SEC_EXCLUDE) != 0 + || (s->flags & SEC_ALLOC) == 0 + || (s->flags & SEC_THREAD_LOCAL) != 0 + || bfd_section_removed_from_list (link_info.output_bfd, s))) + s = s->prev; + if (s == NULL) + s = link_info.output_bfd->sections; + while (s != NULL + && ((s->flags & SEC_ALLOC) == 0 + || (s->flags & SEC_THREAD_LOCAL) != 0)) + s = s->next; + if (s != NULL) + return s; + + return bfd_abs_section_ptr; } /* Fix any .startof. or .sizeof. symbols. When the assemblers see the @@ -5645,8 +5750,8 @@ lang_set_startof (void) if (h != NULL && h->type == bfd_link_hash_undefined) { h->type = bfd_link_hash_defined; - h->u.def.value = bfd_get_section_vma (link_info.output_bfd, s); - h->u.def.section = bfd_abs_section_ptr; + h->u.def.value = 0; + h->u.def.section = s; } sprintf (buf, ".sizeof.%s", secname); @@ -6132,8 +6237,6 @@ lang_add_output (const char *name, int from_script) } } -static lang_output_section_statement_type *current_section; - static int topower (int x) { @@ -6941,69 +7044,6 @@ lang_leave_output_section_statement (fill_type *fill, const char *memspec, pop_stat_ptr (); } -/* Create an absolute symbol with the given name with the value of the - address of first byte of the section named. - - If the symbol already exists, then do nothing. */ - -void -lang_abs_symbol_at_beginning_of (const char *secname, const char *name) -{ - struct bfd_link_hash_entry *h; - - h = bfd_link_hash_lookup (link_info.hash, name, TRUE, TRUE, TRUE); - if (h == NULL) - einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n")); - - if (h->type == bfd_link_hash_new - || h->type == bfd_link_hash_undefined) - { - asection *sec; - - h->type = bfd_link_hash_defined; - - sec = bfd_get_section_by_name (link_info.output_bfd, secname); - if (sec == NULL) - h->u.def.value = 0; - else - h->u.def.value = bfd_get_section_vma (link_info.output_bfd, sec); - - h->u.def.section = bfd_abs_section_ptr; - } -} - -/* Create an absolute symbol with the given name with the value of the - address of the first byte after the end of the section named. - - If the symbol already exists, then do nothing. */ - -void -lang_abs_symbol_at_end_of (const char *secname, const char *name) -{ - struct bfd_link_hash_entry *h; - - h = bfd_link_hash_lookup (link_info.hash, name, TRUE, TRUE, TRUE); - if (h == NULL) - einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n")); - - if (h->type == bfd_link_hash_new - || h->type == bfd_link_hash_undefined) - { - asection *sec; - - h->type = bfd_link_hash_defined; - - sec = bfd_get_section_by_name (link_info.output_bfd, secname); - if (sec == NULL) - h->u.def.value = 0; - else - h->u.def.value = (bfd_get_section_vma (link_info.output_bfd, sec) - + TO_ADDR (sec->size)); - - h->u.def.section = bfd_abs_section_ptr; - } -} - void lang_statement_append (lang_statement_list_type *list, lang_statement_union_type *element, |