/* ARC-specific support for 32-bit ELF
- Copyright (C) 1994 Free Software Foundation, Inc.
+ Copyright (C) 1994, 1995, 1997, 1999 Free Software Foundation, Inc.
Contributed by Doug Evans (dje@cygnus.com).
This file is part of BFD, the Binary File Descriptor library.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
-Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#include "bfd.h"
#include "sysdep.h"
#include "libbfd.h"
-#include "libelf.h"
+#include "elf-bfd.h"
+#include "elf/arc.h"
-static bfd_reloc_status_type arc_elf_unsupported_reloc
- PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
-static const struct reloc_howto_struct *bfd_elf32_bfd_reloc_type_lookup
- PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
-static void arc_info_to_howto
- PARAMS ((bfd *abfd, arelent *cache_ptr, Elf32_Internal_Rela *dst));
+static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup
+ PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
+static void arc_info_to_howto_rel
+ PARAMS ((bfd *, arelent *, Elf32_Internal_Rel *));
+static boolean arc_elf_object_p PARAMS ((bfd *));
+static void arc_elf_final_write_processing PARAMS ((bfd *, boolean));
-enum reloc_type
-{
- R_ARC_NONE = 0,
- R_ARC_ADDR32,
- R_ARC_B22_PCREL,
- R_ARC_max
-};
+/* Try to minimize the amount of space occupied by relocation tables
+ on the ROM (not that the ROM won't be swamped by other ELF overhead). */
+#define USE_REL
static reloc_howto_type elf_arc_howto_table[] =
{
/* This reloc does nothing. */
- HOWTO (R_ARC_NONE, /* type */
- 0, /* rightshift */
- 2, /* size (0 = byte, 1 = short, 2 = long) */
- 32, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
+ HOWTO (R_ARC_NONE, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 32, /* bitsize */
+ false, /* pc_relative */
+ 0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "R_ARC_NONE", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0, /* dst_mask */
- false), /* pcrel_offset */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_ARC_NONE", /* name */
+ false, /* partial_inplace */
+ 0, /* src_mask */
+ 0, /* dst_mask */
+ false), /* pcrel_offset */
/* A standard 32 bit relocation. */
- HOWTO (R_ARC_ADDR32, /* type */
- 0, /* rightshift */
- 2, /* size (0 = byte, 1 = short, 2 = long) */
- 32, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
+ HOWTO (R_ARC_32, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 32, /* bitsize */
+ false, /* pc_relative */
+ 0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "R_ARC_ADDR32", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0xffffffff, /* dst_mask */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_ARC_32", /* name */
+ false, /* partial_inplace */
+ 0xffffffff, /* src_mask */
+ 0xffffffff, /* dst_mask */
false), /* pcrel_offset */
- /* A relative 22 bit branch; the lower two bits must be zero. */
- HOWTO (R_ARC_B22_PCREL, /* type */
- 2, /* rightshift */
- 2, /* size (0 = byte, 1 = short, 2 = long) */
- 22, /* bitsize */
- true, /* pc_relative */
- 7, /* bitpos */
+ /* A 26 bit absolute branch, right shifted by 2. */
+ HOWTO (R_ARC_B26, /* type */
+ 2, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 26, /* bitsize */
+ false, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_bitfield, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_ARC_B26", /* name */
+ false, /* partial_inplace */
+ 0x00ffffff, /* src_mask */
+ 0x00ffffff, /* dst_mask */
+ false), /* pcrel_offset */
+
+ /* A relative 22 bit branch; bits 21-2 are stored in bits 26-7. */
+ HOWTO (R_ARC_B22_PCREL, /* type */
+ 2, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 22, /* bitsize */
+ true, /* pc_relative */
+ 7, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
+ bfd_elf_generic_reloc, /* special_function */
"R_ARC_B22_PCREL", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0x07ffff80, /* dst_mask */
- true), /* pcrel_offset */
+ false, /* partial_inplace */
+ 0x07ffff80, /* src_mask */
+ 0x07ffff80, /* dst_mask */
+ true), /* pcrel_offset */
};
-/* Don't pretend we can deal with unsupported relocs. */
-
-static bfd_reloc_status_type
-arc_elf_unsupported_reloc (abfd, reloc_entry, symbol, data, input_section,
- output_bfd, error_message)
- bfd *abfd;
- arelent *reloc_entry;
- asymbol *symbol;
- PTR data;
- asection *input_section;
- bfd *output_bfd;
- char **error_message;
-{
- abort ();
-}
-
-/* Map BFD reloc types to PowerPC ELF reloc types. */
+/* Map BFD reloc types to ARC ELF reloc types. */
struct arc_reloc_map
{
- unsigned char bfd_reloc_val;
+ bfd_reloc_code_real_type bfd_reloc_val;
unsigned char elf_reloc_val;
};
static const struct arc_reloc_map arc_reloc_map[] =
{
{ BFD_RELOC_NONE, R_ARC_NONE, },
- { BFD_RELOC_32, R_ARC_ADDR32 },
- { BFD_RELOC_CTOR, R_ARC_ADDR32 },
+ { BFD_RELOC_32, R_ARC_32 },
+ { BFD_RELOC_CTOR, R_ARC_32 },
+ { BFD_RELOC_ARC_B26, R_ARC_B26 },
{ BFD_RELOC_ARC_B22_PCREL, R_ARC_B22_PCREL },
};
-static const struct reloc_howto_struct *
+static reloc_howto_type *
bfd_elf32_bfd_reloc_type_lookup (abfd, code)
- bfd *abfd;
+ bfd *abfd ATTRIBUTE_UNUSED;
bfd_reloc_code_real_type code;
{
- int i;
+ unsigned int i;
for (i = 0;
i < sizeof (arc_reloc_map) / sizeof (struct arc_reloc_map);
/* Set the howto pointer for an ARC ELF reloc. */
static void
-arc_info_to_howto (abfd, cache_ptr, dst)
- bfd *abfd;
+arc_info_to_howto_rel (abfd, cache_ptr, dst)
+ bfd *abfd ATTRIBUTE_UNUSED;
arelent *cache_ptr;
- Elf32_Internal_Rela *dst;
+ Elf32_Internal_Rel *dst;
+{
+ unsigned int r_type;
+
+ r_type = ELF32_R_TYPE (dst->r_info);
+ BFD_ASSERT (r_type < (unsigned int) R_ARC_max);
+ cache_ptr->howto = &elf_arc_howto_table[r_type];
+}
+
+/* Set the right machine number for an ARC ELF file. */
+
+static boolean
+arc_elf_object_p (abfd)
+ bfd *abfd;
+{
+ int mach;
+ unsigned long arch = elf_elfheader (abfd)->e_flags & EF_ARC_MACH;
+
+ switch (arch)
+ {
+ case E_ARC_MACH_BASE:
+ mach = bfd_mach_arc_base;
+ break;
+ default:
+ /* Unknown cpu type. ??? What to do? */
+ return false;
+ }
+
+ (void) bfd_default_set_arch_mach (abfd, bfd_arch_arc, mach);
+ return true;
+}
+
+/* The final processing done just before writing out an ARC ELF object file.
+ This gets the ARC architecture right based on the machine number. */
+
+static void
+arc_elf_final_write_processing (abfd, linker)
+ bfd *abfd;
+ boolean linker ATTRIBUTE_UNUSED;
{
- BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_ARC_max);
- cache_ptr->howto = &elf_arc_howto_table[ELF32_R_TYPE (dst->r_info)];
+ int mach;
+ unsigned long val;
+
+ switch (mach = bfd_get_mach (abfd))
+ {
+ case bfd_mach_arc_base:
+ val = E_ARC_MACH_BASE;
+ break;
+ default:
+ return;
+ }
+
+ elf_elfheader (abfd)->e_flags &=~ EF_ARC_MACH;
+ elf_elfheader (abfd)->e_flags |= val;
}
-#define TARGET_BIG_SYM bfd_elf32_arc_vec
-#define TARGET_BIG_NAME "elf32-arc"
+#define TARGET_LITTLE_SYM bfd_elf32_littlearc_vec
+#define TARGET_LITTLE_NAME "elf32-littlearc"
+#define TARGET_BIG_SYM bfd_elf32_bigarc_vec
+#define TARGET_BIG_NAME "elf32-bigarc"
#define ELF_ARCH bfd_arch_arc
#define ELF_MACHINE_CODE EM_CYGNUS_ARC
-#define ELF_MAXPAGESIZE 0x10000
-#define elf_info_to_howto arc_info_to_howto
+#define ELF_MAXPAGESIZE 0x1000
+
+#define elf_info_to_howto 0
+#define elf_info_to_howto_rel arc_info_to_howto_rel
+#define elf_backend_object_p arc_elf_object_p
+#define elf_backend_final_write_processing \
+ arc_elf_final_write_processing
#include "elf32-target.h"
projects / deliverable / binutils-gdb.git / blobdiff