+/* Check to see if any allocated sections overlap with other allocated
+ sections. This can happen when the linker script specifically specifies
+ the output section addresses of the two sections. */
+static void
+lang_check_section_addresses ()
+{
+ asection * s;
+
+ /* Scan all sections in the output list. */
+ for (s = output_bfd->sections; s != NULL; s = s->next)
+ /* Ignore sections which are not loaded or which have no contents. */
+ if ((bfd_get_section_flags (output_bfd, s) & (SEC_ALLOC | SEC_LOAD))
+ && bfd_section_size (output_bfd, s) != 0)
+ {
+ asection * os;
+
+ /* Once we reach section 's' stop our seach. This prevents two
+ warning messages from being produced, one for 'section A overlaps
+ section B' and one for 'section B overlaps section A'. */
+ for (os = output_bfd->sections; os != s; os = os->next)
+ {
+ bfd_vma s_start;
+ bfd_vma s_end;
+ bfd_vma os_start;
+ bfd_vma os_end;
+
+ /* Only consider loadable sections with real contents. */
+ if (((bfd_get_section_flags (output_bfd, os)
+ & (SEC_ALLOC | SEC_LOAD)) == 0)
+ || bfd_section_size (output_bfd, os) == 0)
+ continue;
+
+ /* We must check the sections' LMA addresses not their
+ VMA addresses because overlay sections can have
+ overlapping VMAs but they must have distinct LMAs. */
+ s_start = bfd_section_lma (output_bfd, s);
+ os_start = bfd_section_lma (output_bfd, os);
+ s_end = s_start + bfd_section_size (output_bfd, s) - 1;
+ os_end = os_start + bfd_section_size (output_bfd, os) - 1;
+
+ /* Look for an overlap. */
+ if ((s_end < os_start) || (s_start > os_end))
+ continue;
+
+ einfo (
+_("%X%P: section %s [%V -> %V] overlaps section %s [%V -> %V]\n"),
+ s->name, s_start, s_end, os->name, os_start, os_end);
+
+ /* Once we have found one overlap for this section,
+ stop looking for others. */
+ break;
+ }
+ }
+}
+
+/* This variable indicates whether bfd_relax_section should be called
+ again. */
+
+static boolean relax_again;
+
+/* Set the sizes for all the output sections. */
+
+bfd_vma
+lang_size_sections (s, output_section_statement, prev, fill, dot, relax)
+ lang_statement_union_type * s;
+ lang_output_section_statement_type * output_section_statement;
+ lang_statement_union_type ** prev;
+ fill_type fill;
+ bfd_vma dot;
+ boolean relax;
+{
+ /* Size up the sections from their constituent parts. */
+ for (; s != (lang_statement_union_type *) NULL; s = s->next)
+ {
+ switch (s->header.type)
+ {
+ case lang_output_section_statement_enum:
+ {
+ bfd_vma after;
+ lang_output_section_statement_type *os = &s->output_section_statement;
+
+ if (os->bfd_section == NULL)
+ /* This section was never actually created. */
+ break;
+
+ /* If this is a COFF shared library section, use the size and
+ address from the input section. FIXME: This is COFF
+ specific; it would be cleaner if there were some other way
+ to do this, but nothing simple comes to mind. */
+ if ((os->bfd_section->flags & SEC_COFF_SHARED_LIBRARY) != 0)
+ {
+ asection * input;
+
+ if (os->children.head == NULL
+ || os->children.head->next != NULL
+ || os->children.head->header.type != lang_input_section_enum)
+ einfo (_("%P%X: Internal error on COFF shared library section %s\n"),
+ os->name);
+
+ input = os->children.head->input_section.section;
+ bfd_set_section_vma (os->bfd_section->owner,
+ os->bfd_section,
+ bfd_section_vma (input->owner, input));
+ os->bfd_section->_raw_size = input->_raw_size;
+ break;
+ }
+
+ if (bfd_is_abs_section (os->bfd_section))
+ {
+ /* No matter what happens, an abs section starts at zero. */
+ ASSERT (os->bfd_section->vma == 0);
+ }
+ else
+ {
+ if (os->addr_tree == (etree_type *) NULL)
+ {
+ /* No address specified for this section, get one
+ from the region specification. */
+ if (os->region == (lang_memory_region_type *) NULL
+ || (((bfd_get_section_flags (output_bfd, os->bfd_section)
+ & (SEC_ALLOC | SEC_LOAD)) != 0)
+ && os->region->name[0] == '*'
+ && strcmp (os->region->name, "*default*") == 0))
+ {
+ os->region = lang_memory_default (os->bfd_section);
+ }
+
+ /* If a loadable section is using the default memory
+ region, and some non default memory regions were
+ defined, issue a warning. */
+ if ((bfd_get_section_flags (output_bfd, os->bfd_section)
+ & (SEC_ALLOC | SEC_LOAD)) != 0
+ && ! link_info.relocateable
+ && strcmp (os->region->name, "*default*") == 0
+ && lang_memory_region_list != NULL
+ && (strcmp (lang_memory_region_list->name, "*default*") != 0
+ || lang_memory_region_list->next != NULL))
+ einfo (_("%P: warning: no memory region specified for section `%s'\n"),
+ bfd_get_section_name (output_bfd, os->bfd_section));
+
+ dot = os->region->current;
+
+ if (os->section_alignment == -1)
+ {
+ bfd_vma olddot;
+
+ olddot = dot;
+ dot = align_power (dot, os->bfd_section->alignment_power);
+
+ if (dot != olddot && config.warn_section_align)
+ einfo (_("%P: warning: changing start of section %s by %u bytes\n"),
+ os->name, (unsigned int) (dot - olddot));
+ }
+ }
+ else
+ {
+ etree_value_type r;
+
+ r = exp_fold_tree (os->addr_tree,
+ abs_output_section,
+ lang_allocating_phase_enum,
+ dot, &dot);
+ if (r.valid_p == false)
+ {
+ einfo (_("%F%S: non constant address expression for section %s\n"),
+ os->name);
+ }
+ dot = r.value + r.section->bfd_section->vma;
+ }
+
+ /* The section starts here.
+ First, align to what the section needs. */
+
+ if (os->section_alignment != -1)
+ dot = align_power (dot, os->section_alignment);
+
+ bfd_set_section_vma (0, os->bfd_section, dot);
+
+ os->bfd_section->output_offset = 0;
+ }
+
+ (void) lang_size_sections (os->children.head, os, &os->children.head,
+ os->fill, dot, relax);
+
+ /* Ignore the size of the input sections, use the vma and size to
+ align against. */
+
+ after = ALIGN_N (os->bfd_section->vma +
+ os->bfd_section->_raw_size,
+ /* The coercion here is important, see ld.h. */
+ (bfd_vma) os->block_value);
projects / deliverable / binutils-gdb.git / blobdiff