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Diffstat (limited to 'ld/ldlang.c')
-rw-r--r--ld/ldlang.c188
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,