#include "elf/x86-64.h"
-/* We use only the RELA entries. */
-#define USE_RELA 1
-
/* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */
#define MINUS_ONE (~ (bfd_vma) 0)
PARAMS ((bfd *, bfd_reloc_code_real_type));
static void elf64_x86_64_info_to_howto
PARAMS ((bfd *, arelent *, Elf64_Internal_Rela *));
+static boolean elf64_x86_64_grok_prstatus
+ PARAMS ((bfd *, Elf_Internal_Note *));
+static boolean elf64_x86_64_grok_psinfo
+ PARAMS ((bfd *, Elf_Internal_Note *));
static struct bfd_link_hash_table *elf64_x86_64_link_hash_table_create
PARAMS ((bfd *));
static boolean elf64_x86_64_elf_object_p PARAMS ((bfd *abfd));
static boolean elf64_x86_64_create_dynamic_sections
PARAMS((bfd *, struct bfd_link_info *));
static void elf64_x86_64_copy_indirect_symbol
- PARAMS ((struct elf_link_hash_entry *, struct elf_link_hash_entry *));
+ PARAMS ((struct elf_backend_data *, struct elf_link_hash_entry *,
+ struct elf_link_hash_entry *));
static boolean elf64_x86_64_check_relocs
PARAMS ((bfd *, struct bfd_link_info *, asection *sec,
const Elf_Internal_Rela *));
static asection *elf64_x86_64_gc_mark_hook
- PARAMS ((bfd *, struct bfd_link_info *, Elf_Internal_Rela *,
+ PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *,
struct elf_link_hash_entry *, Elf_Internal_Sym *));
static boolean elf64_x86_64_gc_sweep_hook
BFD_ASSERT (r_type == cache_ptr->howto->type);
}
\f
+/* Support for core dump NOTE sections. */
+static boolean
+elf64_x86_64_grok_prstatus (abfd, note)
+ bfd *abfd;
+ Elf_Internal_Note *note;
+{
+ int offset;
+ size_t raw_size;
+
+ switch (note->descsz)
+ {
+ default:
+ return false;
+
+ case 336: /* sizeof(istruct elf_prstatus) on Linux/x86_64 */
+ /* pr_cursig */
+ elf_tdata (abfd)->core_signal
+ = bfd_get_16 (abfd, note->descdata + 12);
+
+ /* pr_pid */
+ elf_tdata (abfd)->core_pid
+ = bfd_get_32 (abfd, note->descdata + 32);
+
+ /* pr_reg */
+ offset = 112;
+ raw_size = 216;
+
+ break;
+ }
+
+ /* Make a ".reg/999" section. */
+ return _bfd_elfcore_make_pseudosection (abfd, ".reg",
+ raw_size, note->descpos + offset);
+}
+
+static boolean
+elf64_x86_64_grok_psinfo (abfd, note)
+ bfd *abfd;
+ Elf_Internal_Note *note;
+{
+ switch (note->descsz)
+ {
+ default:
+ return false;
+
+ case 136: /* sizeof(struct elf_prpsinfo) on Linux/x86_64 */
+ elf_tdata (abfd)->core_program
+ = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
+ elf_tdata (abfd)->core_command
+ = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
+ }
+
+ /* Note that for some reason, a spurious space is tacked
+ onto the end of the args in some (at least one anyway)
+ implementations, so strip it off if it exists. */
+
+ {
+ char *command = elf_tdata (abfd)->core_command;
+ int n = strlen (command);
+
+ if (0 < n && command[n - 1] == ' ')
+ command[n - 1] = '\0';
+ }
+
+ return true;
+}
+\f
/* Functions for the x86-64 ELF linker. */
/* The name of the dynamic interpreter. This is put in the .interp
};
/* The x86-64 linker needs to keep track of the number of relocs that
- decides to copy as dynamic relocs in check_relocs for each symbol.
+ it decides to copy as dynamic relocs in check_relocs for each symbol.
This is so that it can later discard them if they are found to be
unnecessary. We store the information in a field extending the
regular ELF linker hash table. */
/* Copy the extra info we tack onto an elf_link_hash_entry. */
static void
-elf64_x86_64_copy_indirect_symbol (dir, ind)
+elf64_x86_64_copy_indirect_symbol (bed, dir, ind)
+ struct elf_backend_data *bed;
struct elf_link_hash_entry *dir, *ind;
{
struct elf64_x86_64_link_hash_entry *edir, *eind;
eind->dyn_relocs = NULL;
}
- _bfd_elf_link_hash_copy_indirect (dir, ind);
+ _bfd_elf_link_hash_copy_indirect (bed, dir, ind);
}
static boolean
case R_X86_64_8:
case R_X86_64_16:
case R_X86_64_32:
- case R_X86_64_64:
case R_X86_64_32S:
+ /* Let's help debug shared library creation. These relocs
+ cannot be used in shared libs. Don't error out for
+ sections we don't care about, such as debug sections or
+ non-constant sections. */
+ if (info->shared
+ && (sec->flags & SEC_ALLOC) != 0
+ && (sec->flags & SEC_READONLY) != 0)
+ {
+ (*_bfd_error_handler)
+ (_("%s: relocation %s can not be used when making a shared object; recompile with -fPIC"),
+ bfd_archive_filename (abfd),
+ x86_64_elf_howto_table[ELF64_R_TYPE (rel->r_info)].name);
+ bfd_set_error (bfd_error_bad_value);
+ return false;
+ }
+ /* Fall through. */
+
case R_X86_64_PC8:
case R_X86_64_PC16:
case R_X86_64_PC32:
+ case R_X86_64_64:
if (h != NULL && !info->shared)
{
/* If this reloc is in a read-only section, we might
relocation. */
static asection *
-elf64_x86_64_gc_mark_hook (abfd, info, rel, h, sym)
- bfd *abfd;
+elf64_x86_64_gc_mark_hook (sec, info, rel, h, sym)
+ asection *sec;
struct bfd_link_info *info ATTRIBUTE_UNUSED;
Elf_Internal_Rela *rel;
struct elf_link_hash_entry *h;
}
}
else
- {
- return bfd_section_from_elf_index (abfd, sym->st_shndx);
- }
+ return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
return NULL;
}
/* We must generate a R_X86_64_COPY reloc to tell the dynamic linker
to copy the initial value out of the dynamic object and into the
- runtime process image. */
+ runtime process image. */
if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
{
htab->srelbss->_raw_size += sizeof (Elf64_External_Rela);
Elf_Internal_Rela *rel;
Elf_Internal_Rela *relend;
+ if (info->relocateable)
+ return true;
+
htab = elf64_x86_64_hash_table (info);
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
sym_hashes = elf_sym_hashes (input_bfd);
bfd_set_error (bfd_error_bad_value);
return false;
}
- howto = x86_64_elf_howto_table + r_type;
+ howto = x86_64_elf_howto_table + r_type;
r_symndx = ELF64_R_SYM (rel->r_info);
-
- if (info->relocateable)
- {
- /* This is a relocateable link. We don't have to change
- anything, unless the reloc is against a section symbol,
- in which case we have to adjust according to where the
- section symbol winds up in the output section. */
- if (r_symndx < symtab_hdr->sh_info)
- {
- sym = local_syms + r_symndx;
- if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
- {
- sec = local_sections[r_symndx];
- rel->r_addend += sec->output_offset + sym->st_value;
- }
- }
-
- continue;
- }
-
- /* This is a final link. */
h = NULL;
sym = NULL;
sec = NULL;
else
{
/* This symbol is local, or marked to become local. */
- relocate = true;
- outrel.r_info = ELF64_R_INFO (0, R_X86_64_RELATIVE);
- outrel.r_addend = relocation + rel->r_addend;
+ if (r_type == R_X86_64_64)
+ {
+ relocate = true;
+ outrel.r_info = ELF64_R_INFO (0, R_X86_64_RELATIVE);
+ outrel.r_addend = relocation + rel->r_addend;
+ }
+ else
+ {
+ long sindx;
+
+ if (h == NULL)
+ sec = local_sections[r_symndx];
+ else
+ {
+ BFD_ASSERT (h->root.type == bfd_link_hash_defined
+ || (h->root.type
+ == bfd_link_hash_defweak));
+ sec = h->root.u.def.section;
+ }
+ if (sec != NULL && bfd_is_abs_section (sec))
+ sindx = 0;
+ else if (sec == NULL || sec->owner == NULL)
+ {
+ bfd_set_error (bfd_error_bad_value);
+ return false;
+ }
+ else
+ {
+ asection *osec;
+
+ osec = sec->output_section;
+ sindx = elf_section_data (osec)->dynindx;
+ BFD_ASSERT (sindx > 0);
+ }
+
+ outrel.r_info = ELF64_R_INFO (sindx, r_type);
+ outrel.r_addend = relocation + rel->r_addend;
+ }
}
sreloc = elf_section_data (input_section)->sreloc;
break;
}
- /* FIXME: Why do we allow debugging sections to escape this error?
- More importantly, why do we not emit dynamic relocs for
- R_386_32 above in debugging sections (which are ! SEC_ALLOC)?
- If we had emitted the dynamic reloc, we could remove the
- fudge here. */
+ /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
+ because such sections are not SEC_ALLOC and thus ld.so will
+ not process them. */
if (unresolved_reloc
- && !(info->shared
- && (input_section->flags & SEC_DEBUGGING) != 0
+ && !((input_section->flags & SEC_DEBUGGING) != 0
&& (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
(*_bfd_error_handler)
(_("%s(%s+0x%lx): unresolvable relocation against symbol `%s'"),
#define elf_backend_want_plt_sym 0
#define elf_backend_got_header_size (GOT_ENTRY_SIZE*3)
#define elf_backend_plt_header_size PLT_ENTRY_SIZE
+#define elf_backend_rela_normal 1
#define elf_info_to_howto elf64_x86_64_info_to_howto
#define elf_backend_finish_dynamic_symbol elf64_x86_64_finish_dynamic_symbol
#define elf_backend_gc_mark_hook elf64_x86_64_gc_mark_hook
#define elf_backend_gc_sweep_hook elf64_x86_64_gc_sweep_hook
+#define elf_backend_grok_prstatus elf64_x86_64_grok_prstatus
+#define elf_backend_grok_psinfo elf64_x86_64_grok_psinfo
#define elf_backend_reloc_type_class elf64_x86_64_reloc_type_class
#define elf_backend_relocate_section elf64_x86_64_relocate_section
#define elf_backend_size_dynamic_sections elf64_x86_64_size_dynamic_sections
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