}
}
+static bool get_program_headers (Filedata *);
+static bool get_dynamic_section (Filedata *);
+
+static void
+locate_dynamic_section (Filedata *filedata)
+{
+ unsigned long dynamic_addr = 0;
+ bfd_size_type dynamic_size = 0;
+
+ if (filedata->file_header.e_phnum != 0
+ && get_program_headers (filedata))
+ {
+ Elf_Internal_Phdr *segment;
+ unsigned int i;
+
+ for (i = 0, segment = filedata->program_headers;
+ i < filedata->file_header.e_phnum;
+ i++, segment++)
+ {
+ if (segment->p_type == PT_DYNAMIC)
+ {
+ dynamic_addr = segment->p_offset;
+ dynamic_size = segment->p_filesz;
+
+ if (filedata->section_headers != NULL)
+ {
+ Elf_Internal_Shdr *sec;
+
+ sec = find_section (filedata, ".dynamic");
+ if (sec != NULL)
+ {
+ if (sec->sh_size == 0
+ || sec->sh_type == SHT_NOBITS)
+ {
+ dynamic_addr = 0;
+ dynamic_size = 0;
+ }
+ else
+ {
+ dynamic_addr = sec->sh_offset;
+ dynamic_size = sec->sh_size;
+ }
+ }
+ }
+
+ if (dynamic_addr > filedata->file_size
+ || (dynamic_size > filedata->file_size - dynamic_addr))
+ {
+ dynamic_addr = 0;
+ dynamic_size = 0;
+ }
+ break;
+ }
+ }
+ }
+ filedata->dynamic_addr = dynamic_addr;
+ filedata->dynamic_size = dynamic_size ? dynamic_size : 1;
+}
+
+static bool
+is_pie (Filedata *filedata)
+{
+ Elf_Internal_Dyn *entry;
+
+ if (filedata->dynamic_size == 0)
+ locate_dynamic_section (filedata);
+ if (filedata->dynamic_size <= 1)
+ return false;
+
+ if (!get_dynamic_section (filedata))
+ return false;
+
+ for (entry = filedata->dynamic_section;
+ entry < filedata->dynamic_section + filedata->dynamic_nent;
+ entry++)
+ {
+ if (entry->d_tag == DT_FLAGS_1)
+ {
+ if ((entry->d_un.d_val & DF_1_PIE) != 0)
+ return true;
+ break;
+ }
+ }
+ return false;
+}
+
static char *
-get_file_type (unsigned e_type)
+get_file_type (Filedata *filedata)
{
+ unsigned e_type = filedata->file_header.e_type;
static char buff[64];
switch (e_type)
case ET_NONE: return _("NONE (None)");
case ET_REL: return _("REL (Relocatable file)");
case ET_EXEC: return _("EXEC (Executable file)");
- case ET_DYN: return _("DYN (Shared object file)");
+ case ET_DYN:
+ if (is_pie (filedata))
+ return _("DYN (Position-Independent Executable file)");
+ else
+ return _("DYN (Shared object file)");
case ET_CORE: return _("CORE (Core file)");
default:
printf (_(" ABI Version: %d\n"),
header->e_ident[EI_ABIVERSION]);
printf (_(" Type: %s\n"),
- get_file_type (header->e_type));
+ get_file_type (filedata));
printf (_(" Machine: %s\n"),
get_machine_name (header->e_machine));
printf (_(" Version: 0x%lx\n"),
return false;
}
-/* Returns TRUE if the program headers were loaded. */
+/* Print program header info and locate dynamic section. */
-static bool
+static void
process_program_headers (Filedata * filedata)
{
Elf_Internal_Phdr * segment;
unsigned int i;
Elf_Internal_Phdr * previous_load = NULL;
- filedata->dynamic_addr = 0;
- filedata->dynamic_size = 0;
-
if (filedata->file_header.e_phnum == 0)
{
/* PR binutils/12467. */
if (filedata->file_header.e_phoff != 0)
- {
- warn (_("possibly corrupt ELF header - it has a non-zero program"
- " header offset, but no program headers\n"));
- return false;
- }
+ warn (_("possibly corrupt ELF header - it has a non-zero program"
+ " header offset, but no program headers\n"));
else if (do_segments)
{
if (filedata->is_separate)
else
printf (_("\nThere are no program headers in this file.\n"));
}
- return true;
+ goto no_headers;
}
if (do_segments && !do_header)
{
if (filedata->is_separate)
printf ("\nIn linked file '%s' the ELF file type is %s\n",
- filedata->file_name,
- get_file_type (filedata->file_header.e_type));
+ filedata->file_name, get_file_type (filedata));
else
- printf (_("\nElf file type is %s\n"), get_file_type (filedata->file_header.e_type));
+ printf (_("\nElf file type is %s\n"), get_file_type (filedata));
printf (_("Entry point 0x%s\n"), bfd_vmatoa ("x", filedata->file_header.e_entry));
printf (ngettext ("There is %d program header, starting at offset %s\n",
"There are %d program headers, starting at offset %s\n",
}
if (! get_program_headers (filedata))
- return true;
+ goto no_headers;
if (do_segments)
{
}
}
+ unsigned long dynamic_addr = 0;
+ bfd_size_type dynamic_size = 0;
for (i = 0, segment = filedata->program_headers;
i < filedata->file_header.e_phnum;
i++, segment++)
break;
case PT_DYNAMIC:
- if (filedata->dynamic_addr)
+ if (dynamic_addr)
error (_("more than one dynamic segment\n"));
/* By default, assume that the .dynamic section is the first
section in the DYNAMIC segment. */
- filedata->dynamic_addr = segment->p_offset;
- filedata->dynamic_size = segment->p_filesz;
+ dynamic_addr = segment->p_offset;
+ dynamic_size = segment->p_filesz;
/* Try to locate the .dynamic section. If there is
a section header table, we can easily locate it. */
sec = find_section (filedata, ".dynamic");
if (sec == NULL || sec->sh_size == 0)
{
- /* A corresponding .dynamic section is expected, but on
- IA-64/OpenVMS it is OK for it to be missing. */
- if (!is_ia64_vms (filedata))
- error (_("no .dynamic section in the dynamic segment\n"));
+ /* A corresponding .dynamic section is expected, but on
+ IA-64/OpenVMS it is OK for it to be missing. */
+ if (!is_ia64_vms (filedata))
+ error (_("no .dynamic section in the dynamic segment\n"));
break;
}
if (sec->sh_type == SHT_NOBITS)
{
- filedata->dynamic_size = 0;
+ dynamic_addr = 0;
+ dynamic_size = 0;
break;
}
- filedata->dynamic_addr = sec->sh_offset;
- filedata->dynamic_size = sec->sh_size;
+ dynamic_addr = sec->sh_offset;
+ dynamic_size = sec->sh_size;
/* The PT_DYNAMIC segment, which is used by the run-time
loader, should exactly match the .dynamic section. */
if (do_checks
- && (filedata->dynamic_addr != segment->p_offset
- || filedata->dynamic_size != segment->p_filesz))
+ && (dynamic_addr != segment->p_offset
+ || dynamic_size != segment->p_filesz))
warn (_("\
the .dynamic section is not the same as the dynamic segment\n"));
}
segment. Check this after matching against the section headers
so we don't warn on debuginfo file (which have NOBITS .dynamic
sections). */
- if (filedata->dynamic_addr > filedata->file_size
- || (filedata->dynamic_size
- > filedata->file_size - filedata->dynamic_addr))
+ if (dynamic_addr > filedata->file_size
+ || (dynamic_size > filedata->file_size - dynamic_addr))
{
error (_("the dynamic segment offset + size exceeds the size of the file\n"));
- filedata->dynamic_addr = filedata->dynamic_size = 0;
+ dynamic_addr = 0;
+ dynamic_size = 0;
}
break;
}
}
- return true;
+ filedata->dynamic_addr = dynamic_addr;
+ filedata->dynamic_size = dynamic_size ? dynamic_size : 1;
+ return;
+
+ no_headers:
+ filedata->dynamic_addr = 0;
+ filedata->dynamic_size = 1;
}
{
Elf_Internal_Dyn * entry;
- if (filedata->dynamic_size == 0)
+ if (filedata->dynamic_size <= 1)
{
if (do_dynamic)
{
/* Without loaded section groups we cannot process unwind. */
do_unwind = false;
- res = process_program_headers (filedata);
- if (res)
- res = process_dynamic_section (filedata);
+ process_program_headers (filedata);
+
+ res = process_dynamic_section (filedata);
if (! process_relocs (filedata))
res = false;
{
if (! process_section_groups (d->handle))
res = false;
- if (! process_program_headers (d->handle))
- res = false;
+ process_program_headers (d->handle);
if (! process_dynamic_section (d->handle))
res = false;
if (! process_relocs (d->handle))
projects / deliverable / binutils-gdb.git / commitdiff
