lang_statement_list_type *add_child)
{
lang_statement_list_type add;
- const char *ps;
- lang_assignment_statement_type *start_assign;
lang_output_section_statement_type *os;
lang_output_section_statement_type **os_tail;
os = lang_enter_output_section_statement (secname, address, normal_section,
NULL, NULL, NULL, constraint, 0);
- ps = NULL;
- start_assign = NULL;
- if (config.build_constructors && *os_tail == os)
- {
- /* If the name of the section is representable in C, then create
- symbols to mark the start and the end of the section. */
- for (ps = secname; *ps != '\0'; ps++)
- if (!ISALNUM ((unsigned char) *ps) && *ps != '_')
- break;
- if (*ps == '\0')
- {
- char *symname;
-
- symname = (char *) xmalloc (ps - secname + sizeof "__start_" + 1);
- symname[0] = bfd_get_symbol_leading_char (link_info.output_bfd);
- sprintf (symname + (symname[0] != 0), "__start_%s", secname);
- start_assign
- = lang_add_assignment (exp_provide (symname,
- exp_nameop (NAME, "."),
- FALSE));
- }
- }
-
if (add_child == NULL)
add_child = &os->children;
lang_add_section (add_child, s, NULL, os);
lang_leave_output_section_statement (NULL, DEFAULT_MEMORY_REGION, NULL,
NULL);
- if (start_assign != NULL)
- {
- char *symname;
- lang_assignment_statement_type *stop_assign;
- bfd_vma dot;
-
- symname = (char *) xmalloc (ps - secname + sizeof "__stop_" + 1);
- symname[0] = bfd_get_symbol_leading_char (link_info.output_bfd);
- sprintf (symname + (symname[0] != 0), "__stop_%s", secname);
- stop_assign
- = lang_add_assignment (exp_provide (symname,
- exp_nameop (NAME, "."),
- FALSE));
- /* Evaluate the expression to define the symbol if referenced,
- before sizing dynamic sections. */
- dot = os->bfd_section->vma;
- exp_fold_tree (start_assign->exp, os->bfd_section, &dot);
- dot += TO_ADDR (s->size);
- exp_fold_tree (stop_assign->exp, os->bfd_section, &dot);
- }
-
/* Restore the global list pointer. */
if (after != NULL)
pop_stat_ptr ();
return bfd_abs_section_ptr;
}
-/* Fix any .startof. or .sizeof. symbols. When the assemblers see the
- operator .startof. (section_name), it produces an undefined symbol
- .startof.section_name. Similarly, when it sees
+/* Fix any .startof., .sizeof., __start or __stop symbols. When the
+ assemblers see the operator .startof. (section_name), it produces
+ an undefined symbol .startof.section_name. Similarly, when it sees
.sizeof. (section_name), it produces an undefined symbol
- .sizeof.section_name. For all the output sections, we look for
- such symbols, and set them to the correct value. */
+ .sizeof.section_name. Also for ELF linker, __start_XXX or __stop_XXX
+ symbols should be resolved to the start and end of section XXX. For
+ all the output sections, we look for such symbols, and set them to
+ the correct value. */
static void
lang_set_startof (void)
{
asection *s;
+ char leading_char;
+ bfd_boolean is_elf = (bfd_get_flavour (link_info.output_bfd)
+ == bfd_target_elf_flavour);
+ bfd_boolean is_elocatable = bfd_link_relocatable (&link_info);
- if (bfd_link_relocatable (&link_info))
- return;
+ leading_char = bfd_get_symbol_leading_char (link_info.output_bfd);
for (s = link_info.output_bfd->sections; s != NULL; s = s->next)
{
secname = bfd_get_section_name (link_info.output_bfd, s);
buf = (char *) xmalloc (10 + strlen (secname));
- sprintf (buf, ".startof.%s", secname);
- h = bfd_link_hash_lookup (link_info.hash, buf, FALSE, FALSE, TRUE);
- if (h != NULL && h->type == bfd_link_hash_undefined)
+ if (!is_elocatable)
+ {
+ sprintf (buf, ".startof.%s", secname);
+ h = bfd_link_hash_lookup (link_info.hash, buf, FALSE, FALSE,
+ TRUE);
+ if (h != NULL && h->type == bfd_link_hash_undefined)
+ {
+ h->type = bfd_link_hash_defined;
+ h->u.def.value = 0;
+ h->u.def.section = s;
+ }
+
+ sprintf (buf, ".sizeof.%s", secname);
+ h = bfd_link_hash_lookup (link_info.hash, buf, FALSE, FALSE,
+ TRUE);
+ if (h != NULL && h->type == bfd_link_hash_undefined)
+ {
+ h->type = bfd_link_hash_defined;
+ h->u.def.value = TO_ADDR (s->size);
+ h->u.def.section = bfd_abs_section_ptr;
+ }
+ }
+
+ buf[0] = leading_char;
+ sprintf (buf + (buf[0] != 0), "__start_%s", secname);
+ h = bfd_link_hash_lookup (link_info.hash, buf, FALSE, FALSE,
+ TRUE);
+ if (h != NULL
+ && (h->type == bfd_link_hash_undefined
+ || h->type == bfd_link_hash_undefweak))
{
h->type = bfd_link_hash_defined;
h->u.def.value = 0;
h->u.def.section = s;
+ if (is_elf)
+ ((struct elf_link_hash_entry *) h)->def_regular = 1;
}
- sprintf (buf, ".sizeof.%s", secname);
- h = bfd_link_hash_lookup (link_info.hash, buf, FALSE, FALSE, TRUE);
- if (h != NULL && h->type == bfd_link_hash_undefined)
+ buf[0] = leading_char;
+ sprintf (buf + (buf[0] != 0), "__stop_%s", secname);
+ h = bfd_link_hash_lookup (link_info.hash, buf, FALSE, FALSE,
+ TRUE);
+ if (h != NULL
+ && (h->type == bfd_link_hash_undefined
+ || h->type == bfd_link_hash_undefweak))
{
h->type = bfd_link_hash_defined;
h->u.def.value = TO_ADDR (s->size);
- h->u.def.section = bfd_abs_section_ptr;
+ h->u.def.section = s;
+ if (is_elf)
+ ((struct elf_link_hash_entry *) h)->def_regular = 1;
}
-
free (buf);
}
}
projects / deliverable / binutils-gdb.git / blobdiff