/* ARC-specific support for 32-bit ELF
- Copyright (C) 1994 Free Software Foundation, Inc.
+ Copyright 1994, 1995, 1997, 1999, 2001, 2002, 2005, 2007
+ Free Software Foundation, Inc.
Contributed by Doug Evans (dje@cygnus.com).
-This file is part of BFD, the Binary File Descriptor library.
+ This file is part of BFD, the Binary File Descriptor library.
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
-(at your option) any later version.
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
-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. */
+ 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., 51 Franklin Street - Fifth Floor, Boston,
+ MA 02110-1301, USA. */
-#include "bfd.h"
#include "sysdep.h"
+#include "bfd.h"
#include "libbfd.h"
-#include "libelf.h"
+#include "elf-bfd.h"
+#include "elf/arc.h"
+#include "libiberty.h"
+
+/* 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). */
-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));
+#define USE_REL 1
-enum reloc_type
+static bfd_reloc_status_type
+arc_elf_b22_pcrel (bfd * abfd,
+ arelent * reloc_entry,
+ asymbol * symbol,
+ void * data,
+ asection * input_section,
+ bfd * output_bfd,
+ char ** error_message)
{
- R_ARC_NONE = 0,
- R_ARC_ADDR32,
- R_ARC_B22_PCREL,
- R_ARC_max
-};
+ /* If linking, back up the final symbol address by the address of the
+ reloc. This cannot be accomplished by setting the pcrel_offset
+ field to TRUE, as bfd_install_relocation will detect this and refuse
+ to install the offset in the first place, but bfd_perform_relocation
+ will still insist on removing it. */
+ if (output_bfd == NULL)
+ reloc_entry->addend -= reloc_entry->address;
+
+ /* Fall through to the default elf reloc handler. */
+ return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
+ input_section, output_bfd, error_message);
+}
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 */
- 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 */
+ 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. */
+ TRUE, /* 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 */
- 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 */
- 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 */
- complain_overflow_signed, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "R_ARC_B22_PCREL", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0x07ffff80, /* dst_mask */
- true), /* pcrel_offset */
-
+ 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_32", /* Name. */
+ TRUE, /* Partial_inplace. */
+ 0xffffffff, /* Src_mask. */
+ 0xffffffff, /* Dst_mask. */
+ FALSE), /* PCrel_offset. */
+
+ /* 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. */
+ TRUE, /* 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. */
+ arc_elf_b22_pcrel, /* Special_function. */
+ "R_ARC_B22_PCREL", /* Name. */
+ TRUE, /* Partial_inplace. */
+ 0x07ffff80, /* Src_mask. */
+ 0x07ffff80, /* Dst_mask. */
+ FALSE), /* 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 *
-bfd_elf32_bfd_reloc_type_lookup (abfd, code)
- bfd *abfd;
- bfd_reloc_code_real_type code;
+static reloc_howto_type *
+bfd_elf32_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
+ bfd_reloc_code_real_type code)
+{
+ unsigned int i;
+
+ for (i = ARRAY_SIZE (arc_reloc_map); i--;)
+ if (arc_reloc_map[i].bfd_reloc_val == code)
+ return elf_arc_howto_table + arc_reloc_map[i].elf_reloc_val;
+
+ return NULL;
+}
+
+static reloc_howto_type *
+bfd_elf32_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
+ const char *r_name)
{
- int i;
+ unsigned int i;
for (i = 0;
- i < sizeof (arc_reloc_map) / sizeof (struct arc_reloc_map);
+ i < sizeof (elf_arc_howto_table) / sizeof (elf_arc_howto_table[0]);
i++)
- {
- if (arc_reloc_map[i].bfd_reloc_val == code)
- return &elf_arc_howto_table[arc_reloc_map[i].elf_reloc_val];
- }
+ if (elf_arc_howto_table[i].name != NULL
+ && strcasecmp (elf_arc_howto_table[i].name, r_name) == 0)
+ return &elf_arc_howto_table[i];
return NULL;
}
/* Set the howto pointer for an ARC ELF reloc. */
static void
-arc_info_to_howto (abfd, cache_ptr, dst)
- bfd *abfd;
- arelent *cache_ptr;
- Elf32_Internal_Rela *dst;
+arc_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED,
+ arelent *cache_ptr,
+ Elf_Internal_Rela *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 bfd_boolean
+arc_elf_object_p (bfd *abfd)
+{
+ unsigned int mach = bfd_mach_arc_6;
+
+ if (elf_elfheader(abfd)->e_machine == EM_ARC)
+ {
+ unsigned long arch = elf_elfheader (abfd)->e_flags & EF_ARC_MACH;
+
+ switch (arch)
+ {
+ case E_ARC_MACH_ARC5:
+ mach = bfd_mach_arc_5;
+ break;
+ default:
+ case E_ARC_MACH_ARC6:
+ mach = bfd_mach_arc_6;
+ break;
+ case E_ARC_MACH_ARC7:
+ mach = bfd_mach_arc_7;
+ break;
+ case E_ARC_MACH_ARC8:
+ mach = bfd_mach_arc_8;
+ break;
+ }
+ }
+ return bfd_default_set_arch_mach (abfd, bfd_arch_arc, mach);
+}
+
+/* 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 (bfd *abfd,
+ bfd_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)];
+ unsigned long val;
+
+ switch (bfd_get_mach (abfd))
+ {
+ case bfd_mach_arc_5:
+ val = E_ARC_MACH_ARC5;
+ break;
+ default:
+ case bfd_mach_arc_6:
+ val = E_ARC_MACH_ARC6;
+ break;
+ case bfd_mach_arc_7:
+ val = E_ARC_MACH_ARC7;
+ break;
+ case bfd_mach_arc_8:
+ val = E_ARC_MACH_ARC8;
+ break;
+ }
+ 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 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 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_ARC
+#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"
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