/* MSP430-specific support for 32-bit ELF
- Copyright (C) 2002, 2003 Free Software Foundation, Inc.
+ Copyright (C) 2002-2021 Free Software Foundation, Inc.
Contributed by Dmitry Diky <diwil@mail.ru>
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
+ 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,
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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+ Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+ MA 02110-1301, USA. */
-#include "bfd.h"
#include "sysdep.h"
+#include "bfd.h"
#include "libiberty.h"
#include "libbfd.h"
#include "elf-bfd.h"
#include "elf/msp430.h"
-static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup
- PARAMS ((bfd *, bfd_reloc_code_real_type));
-
-static void msp430_info_to_howto_rela
- PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
-
-static asection *elf32_msp430_gc_mark_hook
- PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *,
- struct elf_link_hash_entry *, Elf_Internal_Sym *));
-
-static bfd_boolean elf32_msp430_gc_sweep_hook
- PARAMS ((bfd *, struct bfd_link_info *, asection *,
- const Elf_Internal_Rela *));
-
-static bfd_boolean elf32_msp430_check_relocs
- PARAMS ((bfd *, struct bfd_link_info *, asection *,
- const Elf_Internal_Rela *));
-
-static bfd_reloc_status_type msp430_final_link_relocate
- PARAMS ((reloc_howto_type *, bfd *, asection *, bfd_byte *,
- Elf_Internal_Rela *, bfd_vma));
-
-static bfd_boolean elf32_msp430_relocate_section
- PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
- Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
+static bfd_boolean debug_relocs = 0;
-static void bfd_elf_msp430_final_write_processing
- PARAMS ((bfd *, bfd_boolean));
+/* All users of this file have bfd_octets_per_byte (abfd, sec) == 1. */
+#define OCTETS_PER_BYTE(ABFD, SEC) 1
-static bfd_boolean elf32_msp430_object_p
- PARAMS ((bfd *));
+static bfd_reloc_status_type
+rl78_sym_diff_handler (bfd * abfd,
+ arelent * reloc,
+ asymbol * sym ATTRIBUTE_UNUSED,
+ void * addr ATTRIBUTE_UNUSED,
+ asection * input_sec,
+ bfd * out_bfd ATTRIBUTE_UNUSED,
+ char ** error_message ATTRIBUTE_UNUSED)
+{
+ bfd_size_type octets;
+ octets = reloc->address * OCTETS_PER_BYTE (abfd, input_sec);
+
+ /* Catch the case where bfd_install_relocation would return
+ bfd_reloc_outofrange because the SYM_DIFF reloc is being used in a very
+ small section. It does not actually matter if this happens because all
+ that SYM_DIFF does is compute a (4-byte) value. A second reloc then uses
+ this value, and it is that reloc that must fit into the section.
+
+ This happens in eg, gcc/testsuite/gcc.c-torture/compile/labels-3.c. */
+ if ((octets + bfd_get_reloc_size (reloc->howto))
+ > bfd_get_section_limit_octets (abfd, input_sec))
+ return bfd_reloc_ok;
+ return bfd_reloc_continue;
+}
-static void elf32_msp430_post_process_headers
- PARAMS ((bfd *, struct bfd_link_info *));
+/* Special handler for relocations which don't have to be relocated.
+ This function just simply returns bfd_reloc_ok. */
+static bfd_reloc_status_type
+msp430_elf_ignore_reloc (bfd *abfd ATTRIBUTE_UNUSED, arelent *reloc_entry,
+ asymbol *symbol ATTRIBUTE_UNUSED,
+ void *data ATTRIBUTE_UNUSED, asection *input_section,
+ bfd *output_bfd, char **error_message ATTRIBUTE_UNUSED)
+{
+ if (output_bfd != NULL)
+ reloc_entry->address += input_section->output_offset;
-/* Use RELA instead of REL. */
-#undef USE_REL
+ return bfd_reloc_ok;
+}
static reloc_howto_type elf_msp430_howto_table[] =
{
HOWTO (R_MSP430_NONE, /* type */
0, /* rightshift */
- 2, /* size (0 = byte, 1 = short, 2 = long) */
- 32, /* bitsize */
+ 3, /* size (0 = byte, 1 = short, 2 = long) */
+ 0, /* bitsize */
FALSE, /* pc_relative */
0, /* bitpos */
- complain_overflow_bitfield, /* complain_on_overflow */
+ complain_overflow_dont,/* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_MSP430_NONE", /* name */
FALSE, /* partial_inplace */
32, /* bitsize */
FALSE, /* pc_relative */
0, /* bitpos */
- complain_overflow_bitfield, /* complain_on_overflow */
+ complain_overflow_bitfield,/* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_MSP430_32", /* name */
FALSE, /* partial_inplace */
0xffffffff, /* dst_mask */
FALSE), /* pcrel_offset */
- /* A 13 bit PC relative relocation. */
+ /* A 10 bit PC relative relocation. */
HOWTO (R_MSP430_10_PCREL, /* type */
1, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
10, /* bitsize */
TRUE, /* pc_relative */
0, /* bitpos */
- complain_overflow_bitfield, /* complain_on_overflow */
+ complain_overflow_bitfield,/* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
- "R_MSP430_13_PCREL", /* name */
+ "R_MSP430_10_PCREL", /* name */
FALSE, /* partial_inplace */
- 0xfff, /* src_mask */
- 0xfff, /* dst_mask */
+ 0x3ff, /* src_mask */
+ 0x3ff, /* dst_mask */
TRUE), /* pcrel_offset */
/* A 16 bit absolute relocation. */
bfd_elf_generic_reloc, /* special_function */
"R_MSP430_16", /* name */
FALSE, /* partial_inplace */
- 0xffff, /* src_mask */
+ 0, /* src_mask */
0xffff, /* dst_mask */
FALSE), /* pcrel_offset */
- /* A 16 bit absolute relocation for command address. */
+ /* A 16 bit PC relative relocation for command address. */
HOWTO (R_MSP430_16_PCREL, /* type */
1, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
bfd_elf_generic_reloc, /* special_function */
"R_MSP430_16_PCREL", /* name */
FALSE, /* partial_inplace */
- 0xffff, /* src_mask */
+ 0, /* src_mask */
0xffff, /* dst_mask */
TRUE), /* pcrel_offset */
0, /* bitpos */
complain_overflow_dont,/* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
- "R_MSP430_16_PCREL_BYTE", /* name */
+ "R_MSP430_16_PCREL_BYTE",/* name */
FALSE, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
- TRUE) /* pcrel_offset */
-};
-
-/* Map BFD reloc types to MSP430 ELF reloc types. */
+ TRUE), /* pcrel_offset */
-struct msp430_reloc_map
-{
- bfd_reloc_code_real_type bfd_reloc_val;
- unsigned int elf_reloc_val;
-};
+ /* A 10 bit PC relative relocation for complicated polymorphs. */
+ HOWTO (R_MSP430_2X_PCREL, /* type */
+ 1, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 10, /* bitsize */
+ TRUE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_bitfield,/* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_MSP430_2X_PCREL", /* name */
+ FALSE, /* partial_inplace */
+ 0x3ff, /* src_mask */
+ 0x3ff, /* dst_mask */
+ TRUE), /* pcrel_offset */
-static const struct msp430_reloc_map msp430_reloc_map[] =
- {
- {BFD_RELOC_NONE, R_MSP430_NONE},
- {BFD_RELOC_32, R_MSP430_32},
- {BFD_RELOC_MSP430_10_PCREL, R_MSP430_10_PCREL},
- {BFD_RELOC_16, R_MSP430_16_BYTE},
- {BFD_RELOC_MSP430_16_PCREL, R_MSP430_16_PCREL},
- {BFD_RELOC_MSP430_16, R_MSP430_16},
- {BFD_RELOC_MSP430_16_PCREL_BYTE, R_MSP430_16_PCREL_BYTE},
- {BFD_RELOC_MSP430_16_BYTE, R_MSP430_16_BYTE}
- };
+ /* A 16 bit relaxable relocation for command address. */
+ HOWTO (R_MSP430_RL_PCREL, /* type */
+ 1, /* rightshift */
+ 1, /* size (0 = byte, 1 = short, 2 = long) */
+ 16, /* bitsize */
+ TRUE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont,/* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_MSP430_RL_PCREL", /* name */
+ FALSE, /* partial_inplace */
+ 0, /* src_mask */
+ 0xffff, /* dst_mask */
+ TRUE) /* pcrel_offset */
-static reloc_howto_type *
-bfd_elf32_bfd_reloc_type_lookup (abfd, code)
- bfd *abfd ATTRIBUTE_UNUSED;
- bfd_reloc_code_real_type code;
-{
- unsigned int i;
+ /* A 8-bit absolute relocation. */
+ , HOWTO (R_MSP430_8, /* type */
+ 0, /* rightshift */
+ 0, /* size (0 = byte, 1 = short, 2 = long) */
+ 8, /* bitsize */
+ FALSE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont,/* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_MSP430_8", /* name */
+ FALSE, /* partial_inplace */
+ 0, /* src_mask */
+ 0xffff, /* dst_mask */
+ FALSE), /* pcrel_offset */
- for (i = 0; i < ARRAY_SIZE (msp430_reloc_map); i++)
- if (msp430_reloc_map[i].bfd_reloc_val == code)
- return &elf_msp430_howto_table[msp430_reloc_map[i].elf_reloc_val];
+ /* Together with a following reloc, allows for the difference
+ between two symbols to be the real addend of the second reloc. */
+ HOWTO (R_MSP430_SYM_DIFF, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 32, /* bitsize */
+ FALSE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont,/* complain_on_overflow */
+ rl78_sym_diff_handler, /* special handler. */
+ "R_MSP430_SYM_DIFF", /* name */
+ FALSE, /* partial_inplace */
+ 0xffffffff, /* src_mask */
+ 0xffffffff, /* dst_mask */
+ FALSE), /* pcrel_offset */
- return NULL;
-}
+ /* The length of unsigned-leb128 is variable, just assume the
+ size is one byte here. */
+ HOWTO (R_MSP430_GNU_SET_ULEB128, /* type */
+ 0, /* rightshift */
+ 0, /* size */
+ 0, /* bitsize */
+ FALSE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont, /* complain_on_overflow */
+ msp430_elf_ignore_reloc, /* special handler. */
+ "R_MSP430_GNU_SET_ULEB128", /* name */
+ FALSE, /* partial_inplace */
+ 0, /* src_mask */
+ 0, /* dst_mask */
+ FALSE), /* pcrel_offset */
+
+ /* The length of unsigned-leb128 is variable, just assume the
+ size is one byte here. */
+ HOWTO (R_MSP430_GNU_SUB_ULEB128, /* type */
+ 0, /* rightshift */
+ 0, /* size */
+ 0, /* bitsize */
+ FALSE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont, /* complain_on_overflow */
+ msp430_elf_ignore_reloc, /* special handler. */
+ "R_MSP430_GNU_SUB_ULEB128", /* name */
+ FALSE, /* partial_inplace */
+ 0, /* src_mask */
+ 0, /* dst_mask */
+ FALSE), /* pcrel_offset */
-/* Set the howto pointer for an MSP430 ELF reloc. */
+};
-static void
-msp430_info_to_howto_rela (abfd, cache_ptr, dst)
- bfd *abfd ATTRIBUTE_UNUSED;
- arelent *cache_ptr;
- Elf_Internal_Rela *dst;
+static reloc_howto_type elf_msp430x_howto_table[] =
{
- unsigned int r_type;
+ HOWTO (R_MSP430_NONE, /* type */
+ 0, /* rightshift */
+ 3, /* size (0 = byte, 1 = short, 2 = long) */
+ 0, /* bitsize */
+ FALSE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont,/* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_MSP430_NONE", /* name */
+ FALSE, /* partial_inplace */
+ 0, /* src_mask */
+ 0, /* dst_mask */
+ FALSE), /* pcrel_offset */
- r_type = ELF32_R_TYPE (dst->r_info);
- BFD_ASSERT (r_type < (unsigned int) R_MSP430_max);
- cache_ptr->howto = &elf_msp430_howto_table[r_type];
-}
+ HOWTO (R_MSP430_ABS32, /* 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_MSP430_ABS32", /* name */
+ FALSE, /* partial_inplace */
+ 0xffffffff, /* src_mask */
+ 0xffffffff, /* dst_mask */
+ FALSE), /* pcrel_offset */
-static asection *
-elf32_msp430_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;
- Elf_Internal_Sym *sym;
-{
- if (h != NULL)
- {
- switch (ELF32_R_TYPE (rel->r_info))
- {
- default:
- switch (h->root.type)
- {
- case bfd_link_hash_defined:
- case bfd_link_hash_defweak:
- return h->root.u.def.section;
+ HOWTO (R_MSP430_ABS16, /* type */
+ 0, /* rightshift */
+ 1, /* size (0 = byte, 1 = short, 2 = long) */
+ 16, /* bitsize */
+ FALSE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont,/* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_MSP430_ABS16", /* name */
+ FALSE, /* partial_inplace */
+ 0, /* src_mask */
+ 0xffff, /* dst_mask */
+ FALSE), /* pcrel_offset */
- case bfd_link_hash_common:
- return h->root.u.c.p->section;
+ HOWTO (R_MSP430_ABS8, /* type */
+ 0, /* rightshift */
+ 0, /* size (0 = byte, 1 = short, 2 = long) */
+ 8, /* bitsize */
+ FALSE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_bitfield,/* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_MSP430_ABS8", /* name */
+ FALSE, /* partial_inplace */
+ 0xff, /* src_mask */
+ 0xff, /* dst_mask */
+ FALSE), /* pcrel_offset */
- default:
- break;
- }
- }
- }
- else
- return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
+ HOWTO (R_MSP430_PCR16, /* type */
+ 1, /* rightshift */
+ 1, /* size (0 = byte, 1 = short, 2 = long) */
+ 16, /* bitsize */
+ TRUE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont,/* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_MSP430_PCR16", /* name */
+ FALSE, /* partial_inplace */
+ 0, /* src_mask */
+ 0xffff, /* dst_mask */
+ TRUE), /* pcrel_offset */
- return NULL;
-}
+ HOWTO (R_MSP430X_PCR20_EXT_SRC,/* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 32, /* bitsize */
+ TRUE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont,/* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_MSP430X_PCR20_EXT_SRC",/* name */
+ FALSE, /* partial_inplace */
+ 0, /* src_mask */
+ 0xffff, /* dst_mask */
+ TRUE), /* pcrel_offset */
-static bfd_boolean
-elf32_msp430_gc_sweep_hook (abfd, info, sec, relocs)
- bfd *abfd ATTRIBUTE_UNUSED;
- struct bfd_link_info *info ATTRIBUTE_UNUSED;
- asection *sec ATTRIBUTE_UNUSED;
- const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED;
-{
- /* We don't use got and plt entries for msp430. */
- return TRUE;
-}
+ HOWTO (R_MSP430X_PCR20_EXT_DST,/* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 32, /* bitsize */
+ TRUE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont,/* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_MSP430X_PCR20_EXT_DST",/* name */
+ FALSE, /* partial_inplace */
+ 0, /* src_mask */
+ 0xffff, /* dst_mask */
+ TRUE), /* pcrel_offset */
-/* Look through the relocs for a section during the first phase.
- Since we don't do .gots or .plts, we just need to consider the
- virtual table relocs for gc. */
+ HOWTO (R_MSP430X_PCR20_EXT_ODST,/* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 32, /* bitsize */
+ TRUE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont,/* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_MSP430X_PCR20_EXT_ODST",/* name */
+ FALSE, /* partial_inplace */
+ 0, /* src_mask */
+ 0xffff, /* dst_mask */
+ TRUE), /* pcrel_offset */
-static bfd_boolean
-elf32_msp430_check_relocs (abfd, info, sec, relocs)
- bfd *abfd;
- struct bfd_link_info *info;
- asection *sec;
- const Elf_Internal_Rela *relocs;
-{
- Elf_Internal_Shdr *symtab_hdr;
- struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
- const Elf_Internal_Rela *rel;
- const Elf_Internal_Rela *rel_end;
+ HOWTO (R_MSP430X_ABS20_EXT_SRC,/* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 32, /* bitsize */
+ TRUE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont,/* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_MSP430X_ABS20_EXT_SRC",/* name */
+ FALSE, /* partial_inplace */
+ 0, /* src_mask */
+ 0xffff, /* dst_mask */
+ TRUE), /* pcrel_offset */
- if (info->relocatable)
- return TRUE;
+ HOWTO (R_MSP430X_ABS20_EXT_DST,/* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 32, /* bitsize */
+ TRUE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont,/* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_MSP430X_ABS20_EXT_DST",/* name */
+ FALSE, /* partial_inplace */
+ 0, /* src_mask */
+ 0xffff, /* dst_mask */
+ TRUE), /* pcrel_offset */
- symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
- sym_hashes = elf_sym_hashes (abfd);
- sym_hashes_end =
- sym_hashes + symtab_hdr->sh_size / sizeof (Elf32_External_Sym);
- if (!elf_bad_symtab (abfd))
- sym_hashes_end -= symtab_hdr->sh_info;
+ HOWTO (R_MSP430X_ABS20_EXT_ODST,/* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 32, /* bitsize */
+ TRUE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont,/* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_MSP430X_ABS20_EXT_ODST",/* name */
+ FALSE, /* partial_inplace */
+ 0, /* src_mask */
+ 0xffff, /* dst_mask */
+ TRUE), /* pcrel_offset */
- rel_end = relocs + sec->reloc_count;
- for (rel = relocs; rel < rel_end; rel++)
- {
- struct elf_link_hash_entry *h;
- unsigned long r_symndx;
+ HOWTO (R_MSP430X_ABS20_ADR_SRC,/* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 32, /* bitsize */
+ TRUE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont,/* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_MSP430X_ABS20_ADR_SRC",/* name */
+ FALSE, /* partial_inplace */
+ 0, /* src_mask */
+ 0xffff, /* dst_mask */
+ TRUE), /* pcrel_offset */
- r_symndx = ELF32_R_SYM (rel->r_info);
- if (r_symndx < symtab_hdr->sh_info)
- h = NULL;
- else
- h = sym_hashes[r_symndx - symtab_hdr->sh_info];
- }
+ HOWTO (R_MSP430X_ABS20_ADR_DST,/* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 32, /* bitsize */
+ TRUE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont,/* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_MSP430X_ABS20_ADR_DST",/* name */
+ FALSE, /* partial_inplace */
+ 0, /* src_mask */
+ 0xffff, /* dst_mask */
+ TRUE), /* pcrel_offset */
+
+ HOWTO (R_MSP430X_PCR16, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 32, /* bitsize */
+ TRUE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont,/* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_MSP430X_PCR16", /* name */
+ FALSE, /* partial_inplace */
+ 0, /* src_mask */
+ 0xffff, /* dst_mask */
+ TRUE), /* pcrel_offset */
+
+ HOWTO (R_MSP430X_PCR20_CALL, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 32, /* bitsize */
+ TRUE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont,/* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_MSP430X_PCR20_CALL",/* name */
+ FALSE, /* partial_inplace */
+ 0, /* src_mask */
+ 0xffff, /* dst_mask */
+ TRUE), /* pcrel_offset */
+
+ HOWTO (R_MSP430X_ABS16, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 32, /* bitsize */
+ TRUE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont,/* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_MSP430X_ABS16", /* name */
+ FALSE, /* partial_inplace */
+ 0, /* src_mask */
+ 0xffff, /* dst_mask */
+ TRUE), /* pcrel_offset */
+
+ HOWTO (R_MSP430_ABS_HI16, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 32, /* bitsize */
+ TRUE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont,/* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_MSP430_ABS_HI16", /* name */
+ FALSE, /* partial_inplace */
+ 0, /* src_mask */
+ 0xffff, /* dst_mask */
+ TRUE), /* pcrel_offset */
+
+ HOWTO (R_MSP430_PREL31, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 32, /* bitsize */
+ TRUE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont,/* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_MSP430_PREL31", /* name */
+ FALSE, /* partial_inplace */
+ 0, /* src_mask */
+ 0xffff, /* dst_mask */
+ TRUE), /* pcrel_offset */
+
+ EMPTY_HOWTO (R_MSP430_EHTYPE),
+
+ /* A 10 bit PC relative relocation. */
+ HOWTO (R_MSP430X_10_PCREL, /* type */
+ 1, /* rightshift */
+ 1, /* size (0 = byte, 1 = short, 2 = long) */
+ 10, /* bitsize */
+ TRUE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_bitfield,/* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_MSP430X_10_PCREL", /* name */
+ FALSE, /* partial_inplace */
+ 0x3ff, /* src_mask */
+ 0x3ff, /* dst_mask */
+ TRUE), /* pcrel_offset */
+
+ /* A 10 bit PC relative relocation for complicated polymorphs. */
+ HOWTO (R_MSP430X_2X_PCREL, /* type */
+ 1, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 10, /* bitsize */
+ TRUE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_bitfield,/* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_MSP430X_2X_PCREL", /* name */
+ FALSE, /* partial_inplace */
+ 0x3ff, /* src_mask */
+ 0x3ff, /* dst_mask */
+ TRUE), /* pcrel_offset */
+
+ /* Together with a following reloc, allows for the difference
+ between two symbols to be the real addend of the second reloc. */
+ HOWTO (R_MSP430X_SYM_DIFF, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 32, /* bitsize */
+ FALSE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont,/* complain_on_overflow */
+ rl78_sym_diff_handler, /* special handler. */
+ "R_MSP430X_SYM_DIFF", /* name */
+ FALSE, /* partial_inplace */
+ 0xffffffff, /* src_mask */
+ 0xffffffff, /* dst_mask */
+ FALSE), /* pcrel_offset */
+
+ /* The length of unsigned-leb128 is variable, just assume the
+ size is one byte here. */
+ HOWTO (R_MSP430X_GNU_SET_ULEB128, /* type */
+ 0, /* rightshift */
+ 0, /* size */
+ 0, /* bitsize */
+ FALSE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont, /* complain_on_overflow */
+ msp430_elf_ignore_reloc, /* special handler. */
+ "R_MSP430X_GNU_SET_ULEB128", /* name */
+ FALSE, /* partial_inplace */
+ 0, /* src_mask */
+ 0, /* dst_mask */
+ FALSE), /* pcrel_offset */
+
+ /* The length of unsigned-leb128 is variable, just assume the
+ size is one byte here. */
+ HOWTO (R_MSP430X_GNU_SUB_ULEB128, /* type */
+ 0, /* rightshift */
+ 0, /* size */
+ 0, /* bitsize */
+ FALSE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont, /* complain_on_overflow */
+ msp430_elf_ignore_reloc, /* special handler. */
+ "R_MSP430X_GNU_SUB_ULEB128", /* name */
+ FALSE, /* partial_inplace */
+ 0, /* src_mask */
+ 0, /* dst_mask */
+ FALSE), /* pcrel_offset */
+
+};
+
+/* Map BFD reloc types to MSP430 ELF reloc types. */
+
+struct msp430_reloc_map
+{
+ bfd_reloc_code_real_type bfd_reloc_val;
+ unsigned int elf_reloc_val;
+};
+
+static const struct msp430_reloc_map msp430_reloc_map[] =
+{
+ {BFD_RELOC_NONE, R_MSP430_NONE},
+ {BFD_RELOC_32, R_MSP430_32},
+ {BFD_RELOC_MSP430_10_PCREL, R_MSP430_10_PCREL},
+ {BFD_RELOC_16, R_MSP430_16_BYTE},
+ {BFD_RELOC_MSP430_16_PCREL, R_MSP430_16_PCREL},
+ {BFD_RELOC_MSP430_16, R_MSP430_16},
+ {BFD_RELOC_MSP430_16_PCREL_BYTE, R_MSP430_16_PCREL_BYTE},
+ {BFD_RELOC_MSP430_16_BYTE, R_MSP430_16_BYTE},
+ {BFD_RELOC_MSP430_2X_PCREL, R_MSP430_2X_PCREL},
+ {BFD_RELOC_MSP430_RL_PCREL, R_MSP430_RL_PCREL},
+ {BFD_RELOC_8, R_MSP430_8},
+ {BFD_RELOC_MSP430_SYM_DIFF, R_MSP430_SYM_DIFF},
+ {BFD_RELOC_MSP430_SET_ULEB128, R_MSP430_GNU_SET_ULEB128 },
+ {BFD_RELOC_MSP430_SUB_ULEB128, R_MSP430_GNU_SUB_ULEB128 }
+};
+
+static const struct msp430_reloc_map msp430x_reloc_map[] =
+{
+ {BFD_RELOC_NONE, R_MSP430_NONE},
+ {BFD_RELOC_32, R_MSP430_ABS32},
+ {BFD_RELOC_16, R_MSP430_ABS16},
+ {BFD_RELOC_8, R_MSP430_ABS8},
+ {BFD_RELOC_MSP430_ABS8, R_MSP430_ABS8},
+ {BFD_RELOC_MSP430X_PCR20_EXT_SRC, R_MSP430X_PCR20_EXT_SRC},
+ {BFD_RELOC_MSP430X_PCR20_EXT_DST, R_MSP430X_PCR20_EXT_DST},
+ {BFD_RELOC_MSP430X_PCR20_EXT_ODST, R_MSP430X_PCR20_EXT_ODST},
+ {BFD_RELOC_MSP430X_ABS20_EXT_SRC, R_MSP430X_ABS20_EXT_SRC},
+ {BFD_RELOC_MSP430X_ABS20_EXT_DST, R_MSP430X_ABS20_EXT_DST},
+ {BFD_RELOC_MSP430X_ABS20_EXT_ODST, R_MSP430X_ABS20_EXT_ODST},
+ {BFD_RELOC_MSP430X_ABS20_ADR_SRC, R_MSP430X_ABS20_ADR_SRC},
+ {BFD_RELOC_MSP430X_ABS20_ADR_DST, R_MSP430X_ABS20_ADR_DST},
+ {BFD_RELOC_MSP430X_PCR16, R_MSP430X_PCR16},
+ {BFD_RELOC_MSP430X_PCR20_CALL, R_MSP430X_PCR20_CALL},
+ {BFD_RELOC_MSP430X_ABS16, R_MSP430X_ABS16},
+ {BFD_RELOC_MSP430_ABS_HI16, R_MSP430_ABS_HI16},
+ {BFD_RELOC_MSP430_PREL31, R_MSP430_PREL31},
+ {BFD_RELOC_MSP430_10_PCREL, R_MSP430X_10_PCREL},
+ {BFD_RELOC_MSP430_2X_PCREL, R_MSP430X_2X_PCREL},
+ {BFD_RELOC_MSP430_RL_PCREL, R_MSP430X_PCR16},
+ {BFD_RELOC_MSP430_SYM_DIFF, R_MSP430X_SYM_DIFF},
+ {BFD_RELOC_MSP430_SET_ULEB128, R_MSP430X_GNU_SET_ULEB128 },
+ {BFD_RELOC_MSP430_SUB_ULEB128, R_MSP430X_GNU_SUB_ULEB128 }
+};
+
+static inline bfd_boolean
+uses_msp430x_relocs (bfd * abfd)
+{
+ extern const bfd_target msp430_elf32_ti_vec;
+
+ return bfd_get_mach (abfd) == bfd_mach_msp430x
+ || abfd->xvec == & msp430_elf32_ti_vec;
+}
+
+static reloc_howto_type *
+bfd_elf32_bfd_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
+ bfd_reloc_code_real_type code)
+{
+ unsigned int i;
+
+ if (uses_msp430x_relocs (abfd))
+ {
+ for (i = ARRAY_SIZE (msp430x_reloc_map); i--;)
+ if (msp430x_reloc_map[i].bfd_reloc_val == code)
+ return elf_msp430x_howto_table + msp430x_reloc_map[i].elf_reloc_val;
+ }
+ else
+ {
+ for (i = 0; i < ARRAY_SIZE (msp430_reloc_map); i++)
+ if (msp430_reloc_map[i].bfd_reloc_val == code)
+ return &elf_msp430_howto_table[msp430_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)
+{
+ unsigned int i;
+
+ if (uses_msp430x_relocs (abfd))
+ {
+ for (i = ARRAY_SIZE (elf_msp430x_howto_table); i--;)
+ if (elf_msp430x_howto_table[i].name != NULL
+ && strcasecmp (elf_msp430x_howto_table[i].name, r_name) == 0)
+ return elf_msp430x_howto_table + i;
+ }
+ else
+ {
+ for (i = 0;
+ i < (sizeof (elf_msp430_howto_table)
+ / sizeof (elf_msp430_howto_table[0]));
+ i++)
+ if (elf_msp430_howto_table[i].name != NULL
+ && strcasecmp (elf_msp430_howto_table[i].name, r_name) == 0)
+ return &elf_msp430_howto_table[i];
+ }
+
+ return NULL;
+}
+
+/* Set the howto pointer for an MSP430 ELF reloc. */
+
+static bfd_boolean
+msp430_info_to_howto_rela (bfd * abfd,
+ arelent * cache_ptr,
+ Elf_Internal_Rela * dst)
+{
+ unsigned int r_type;
+
+ r_type = ELF32_R_TYPE (dst->r_info);
+
+ if (uses_msp430x_relocs (abfd))
+ {
+ if (r_type >= (unsigned int) R_MSP430x_max)
+ {
+ /* xgettext:c-format */
+ _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
+ abfd, r_type);
+ bfd_set_error (bfd_error_bad_value);
+ return FALSE;
+ }
+ cache_ptr->howto = elf_msp430x_howto_table + r_type;
+ }
+ else if (r_type >= (unsigned int) R_MSP430_max)
+ {
+ /* xgettext:c-format */
+ _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
+ abfd, r_type);
+ bfd_set_error (bfd_error_bad_value);
+ return FALSE;
+ }
+ else
+ cache_ptr->howto = &elf_msp430_howto_table[r_type];
+
+ return TRUE;
+}
+
+/* Look through the relocs for a section during the first phase.
+ Since we don't do .gots or .plts, we just need to consider the
+ virtual table relocs for gc. */
+
+static bfd_boolean
+elf32_msp430_check_relocs (bfd * abfd, struct bfd_link_info * info,
+ asection * sec, const Elf_Internal_Rela * relocs)
+{
+ Elf_Internal_Shdr *symtab_hdr;
+ struct elf_link_hash_entry **sym_hashes;
+ const Elf_Internal_Rela *rel;
+ const Elf_Internal_Rela *rel_end;
+
+ if (bfd_link_relocatable (info))
+ return TRUE;
+
+ symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
+ sym_hashes = elf_sym_hashes (abfd);
+
+ rel_end = relocs + sec->reloc_count;
+ for (rel = relocs; rel < rel_end; rel++)
+ {
+ struct elf_link_hash_entry *h;
+ unsigned long r_symndx;
+
+ r_symndx = ELF32_R_SYM (rel->r_info);
+ if (r_symndx < symtab_hdr->sh_info)
+ h = NULL;
+ else
+ {
+ h = sym_hashes[r_symndx - symtab_hdr->sh_info];
+ while (h->root.type == bfd_link_hash_indirect
+ || h->root.type == bfd_link_hash_warning)
+ h = (struct elf_link_hash_entry *) h->root.u.i.link;
+ }
+ }
return TRUE;
}
routines, but a few relocs, we have to do them ourselves. */
static bfd_reloc_status_type
-msp430_final_link_relocate (howto, input_bfd, input_section,
- contents, rel, relocation)
- reloc_howto_type *howto;
- bfd *input_bfd;
- asection *input_section;
- bfd_byte *contents;
- Elf_Internal_Rela *rel;
- bfd_vma relocation;
+msp430_final_link_relocate (reloc_howto_type * howto,
+ bfd * input_bfd,
+ asection * input_section,
+ bfd_byte * contents,
+ Elf_Internal_Rela * rel,
+ bfd_vma relocation,
+ struct bfd_link_info * info)
{
+ static asection * sym_diff_section;
+ static bfd_vma sym_diff_value;
+
+ struct bfd_elf_section_data * esd = elf_section_data (input_section);
bfd_reloc_status_type r = bfd_reloc_ok;
bfd_vma x;
bfd_signed_vma srel;
+ bfd_boolean is_rel_reloc = FALSE;
+
+ if (uses_msp430x_relocs (input_bfd))
+ {
+ /* See if we have a REL type relocation. */
+ is_rel_reloc = (esd->rel.hdr != NULL);
+ /* Sanity check - only one type of relocation per section.
+ FIXME: Theoretically it is possible to have both types,
+ but if that happens how can we distinguish between the two ? */
+ BFD_ASSERT (! is_rel_reloc || ! esd->rela.hdr);
+ /* If we are using a REL relocation then the addend should be empty. */
+ BFD_ASSERT (! is_rel_reloc || rel->r_addend == 0);
+ }
+
+ if (debug_relocs)
+ printf ("writing relocation (%p) at 0x%lx type: %d\n", rel,
+ (long) (input_section->output_section->vma + input_section->output_offset
+ + rel->r_offset), howto->type);
+ if (sym_diff_section != NULL)
+ {
+ BFD_ASSERT (sym_diff_section == input_section);
+
+ if (uses_msp430x_relocs (input_bfd))
+ switch (howto->type)
+ {
+ case R_MSP430X_GNU_SET_ULEB128:
+ relocation += (!is_rel_reloc ? rel->r_addend : 0);
+ /* Fall through. */
+ case R_MSP430_ABS32:
+ /* If we are computing a 32-bit value for the location lists
+ and the result is 0 then we add one to the value. A zero
+ value can result because of linker relaxation deleteing
+ prologue instructions and using a value of 1 (for the begin
+ and end offsets in the location list entry) results in a
+ nul entry which does not prevent the following entries from
+ being parsed. */
+ if (relocation == sym_diff_value
+ && strcmp (input_section->name, ".debug_loc") == 0)
+ ++ relocation;
+ /* Fall through. */
+ case R_MSP430_ABS16:
+ case R_MSP430X_ABS16:
+ case R_MSP430_ABS8:
+ BFD_ASSERT (! is_rel_reloc);
+ relocation -= sym_diff_value;
+ break;
+
+ default:
+ return bfd_reloc_dangerous;
+ }
+ else
+ switch (howto->type)
+ {
+ case R_MSP430_GNU_SET_ULEB128:
+ relocation += (!is_rel_reloc ? rel->r_addend : 0);
+ /* Fall through. */
+ case R_MSP430_32:
+ case R_MSP430_16:
+ case R_MSP430_16_BYTE:
+ case R_MSP430_8:
+ relocation -= sym_diff_value;
+ break;
- switch (howto->type)
+ default:
+ return bfd_reloc_dangerous;
+ }
+
+ sym_diff_section = NULL;
+ }
+
+ if ((uses_msp430x_relocs (input_bfd)
+ && howto->type == R_MSP430X_GNU_SET_ULEB128)
+ || (!uses_msp430x_relocs (input_bfd)
+ && howto->type == R_MSP430_GNU_SET_ULEB128))
{
+ unsigned int len, new_len = 0;
+ bfd_byte *endp, *p;
+ unsigned int val = relocation;
+
+ _bfd_read_unsigned_leb128 (input_bfd, contents + rel->r_offset, &len);
+
+ /* Clean the contents value to zero. Do not reduce the length. */
+ p = contents + rel->r_offset;
+ endp = (p + len) - 1;
+ memset (p, 0x80, len - 1);
+ *(endp) = 0;
+
+ /* Get the length of the new uleb128 value. */
+ do
+ {
+ new_len++;
+ val >>= 7;
+ } while (val);
+
+ if (new_len > len)
+ {
+ _bfd_error_handler
+ (_("error: final size of uleb128 value at offset 0x%lx in %pA "
+ "from %pB exceeds available space"),
+ (long) rel->r_offset, input_section, input_bfd);
+ }
+ else
+ {
+ /* If the number of bytes required to store the new value has
+ decreased, "right align" the new value within the available space,
+ so the MSB side is padded with uleb128 zeros (0x80). */
+ p = _bfd_write_unsigned_leb128 (p + (len - new_len), endp,
+ relocation);
+ /* We checked there is enough space for the new value above, so this
+ should never be NULL. */
+ BFD_ASSERT (p);
+ }
+
+ return bfd_reloc_ok;
+ }
+ else if (uses_msp430x_relocs (input_bfd))
+ switch (howto->type)
+ {
+ case R_MSP430X_SYM_DIFF:
+ case R_MSP430X_GNU_SUB_ULEB128:
+ /* Cache the input section and value.
+ The offset is unreliable, since relaxation may
+ have reduced the following reloc's offset. */
+ BFD_ASSERT (! is_rel_reloc);
+ sym_diff_section = input_section;
+ sym_diff_value = relocation + (howto->type == R_MSP430X_GNU_SUB_ULEB128
+ ? rel->r_addend : 0);
+ return bfd_reloc_ok;
+
+ case R_MSP430_ABS16:
+ contents += rel->r_offset;
+ srel = (bfd_signed_vma) relocation;
+ if (is_rel_reloc)
+ srel += bfd_get_16 (input_bfd, contents);
+ else
+ srel += rel->r_addend;
+ bfd_put_16 (input_bfd, srel & 0xffff, contents);
+ break;
+
+ case R_MSP430X_10_PCREL:
+ contents += rel->r_offset;
+ srel = (bfd_signed_vma) relocation;
+ if (is_rel_reloc)
+ srel += bfd_get_16 (input_bfd, contents) & 0x3ff;
+ else
+ srel += rel->r_addend;
+ srel -= rel->r_offset;
+ srel -= 2; /* Branch instructions add 2 to the PC... */
+ srel -= (input_section->output_section->vma +
+ input_section->output_offset);
+ if (srel & 1)
+ return bfd_reloc_outofrange;
+
+ /* MSP430 addresses commands as words. */
+ srel >>= 1;
+
+ /* Check for an overflow. */
+ if (srel < -512 || srel > 511)
+ {
+ if (info->disable_target_specific_optimizations < 0)
+ {
+ static bfd_boolean warned = FALSE;
+ if (! warned)
+ {
+ info->callbacks->warning
+ (info,
+ _("try enabling relaxation to avoid relocation truncations"),
+ NULL, input_bfd, input_section, relocation);
+ warned = TRUE;
+ }
+ }
+ return bfd_reloc_overflow;
+ }
+
+ x = bfd_get_16 (input_bfd, contents);
+ x = (x & 0xfc00) | (srel & 0x3ff);
+ bfd_put_16 (input_bfd, x, contents);
+ break;
+
+ case R_MSP430X_PCR20_EXT_ODST:
+ /* [0,4]+[48,16] = ---F ---- ---- FFFF */
+ contents += rel->r_offset;
+ srel = (bfd_signed_vma) relocation;
+ if (is_rel_reloc)
+ {
+ bfd_vma addend;
+ addend = (bfd_get_16 (input_bfd, contents) & 0xf) << 16;
+ addend |= bfd_get_16 (input_bfd, contents + 6);
+ srel += addend;
+
+ }
+ else
+ srel += rel->r_addend;
+ srel -= rel->r_offset;
+ srel -= (input_section->output_section->vma +
+ input_section->output_offset);
+ bfd_put_16 (input_bfd, (srel & 0xffff), contents + 6);
+ x = bfd_get_16 (input_bfd, contents);
+ x = (x & 0xfff0) | ((srel >> 16) & 0xf);
+ bfd_put_16 (input_bfd, x, contents);
+ break;
+
+ case R_MSP430X_ABS20_EXT_SRC:
+ /* [7,4]+[32,16] = -78- ---- FFFF */
+ contents += rel->r_offset;
+ srel = (bfd_signed_vma) relocation;
+ if (is_rel_reloc)
+ {
+ bfd_vma addend;
+ addend = (bfd_get_16 (input_bfd, contents) & 0x0780) << 9;
+ addend |= bfd_get_16 (input_bfd, contents + 4);
+ srel += addend;
+ }
+ else
+ srel += rel->r_addend;
+ bfd_put_16 (input_bfd, (srel & 0xffff), contents + 4);
+ srel >>= 16;
+ x = bfd_get_16 (input_bfd, contents);
+ x = (x & 0xf87f) | ((srel << 7) & 0x0780);
+ bfd_put_16 (input_bfd, x, contents);
+ break;
+
+ case R_MSP430_16_PCREL:
+ contents += rel->r_offset;
+ srel = (bfd_signed_vma) relocation;
+ if (is_rel_reloc)
+ srel += bfd_get_16 (input_bfd, contents);
+ else
+ srel += rel->r_addend;
+ srel -= rel->r_offset;
+ /* Only branch instructions add 2 to the PC... */
+ srel -= (input_section->output_section->vma +
+ input_section->output_offset);
+ if (srel & 1)
+ return bfd_reloc_outofrange;
+ bfd_put_16 (input_bfd, srel & 0xffff, contents);
+ break;
+
+ case R_MSP430X_PCR20_EXT_DST:
+ /* [0,4]+[32,16] = ---F ---- FFFF */
+ contents += rel->r_offset;
+ srel = (bfd_signed_vma) relocation;
+ if (is_rel_reloc)
+ {
+ bfd_vma addend;
+ addend = (bfd_get_16 (input_bfd, contents) & 0xf) << 16;
+ addend |= bfd_get_16 (input_bfd, contents + 4);
+ srel += addend;
+ }
+ else
+ srel += rel->r_addend;
+ srel -= rel->r_offset;
+ srel -= (input_section->output_section->vma +
+ input_section->output_offset);
+ bfd_put_16 (input_bfd, (srel & 0xffff), contents + 4);
+ srel >>= 16;
+ x = bfd_get_16 (input_bfd, contents);
+ x = (x & 0xfff0) | (srel & 0xf);
+ bfd_put_16 (input_bfd, x, contents);
+ break;
+
+ case R_MSP430X_PCR20_EXT_SRC:
+ /* [7,4]+[32,16] = -78- ---- FFFF */
+ contents += rel->r_offset;
+ srel = (bfd_signed_vma) relocation;
+ if (is_rel_reloc)
+ {
+ bfd_vma addend;
+ addend = ((bfd_get_16 (input_bfd, contents) & 0x0780) << 9);
+ addend |= bfd_get_16 (input_bfd, contents + 4);
+ srel += addend;;
+ }
+ else
+ srel += rel->r_addend;
+ srel -= rel->r_offset;
+ /* Only branch instructions add 2 to the PC... */
+ srel -= (input_section->output_section->vma +
+ input_section->output_offset);
+ bfd_put_16 (input_bfd, (srel & 0xffff), contents + 4);
+ srel >>= 16;
+ x = bfd_get_16 (input_bfd, contents);
+ x = (x & 0xf87f) | ((srel << 7) & 0x0780);
+ bfd_put_16 (input_bfd, x, contents);
+ break;
+
+ case R_MSP430_ABS8:
+ contents += rel->r_offset;
+ srel = (bfd_signed_vma) relocation;
+ if (is_rel_reloc)
+ srel += bfd_get_8 (input_bfd, contents);
+ else
+ srel += rel->r_addend;
+ bfd_put_8 (input_bfd, srel & 0xff, contents);
+ break;
+
+ case R_MSP430X_ABS20_EXT_DST:
+ /* [0,4]+[32,16] = ---F ---- FFFF */
+ contents += rel->r_offset;
+ srel = (bfd_signed_vma) relocation;
+ if (is_rel_reloc)
+ {
+ bfd_vma addend;
+ addend = (bfd_get_16 (input_bfd, contents) & 0xf) << 16;
+ addend |= bfd_get_16 (input_bfd, contents + 4);
+ srel += addend;
+ }
+ else
+ srel += rel->r_addend;
+ bfd_put_16 (input_bfd, (srel & 0xffff), contents + 4);
+ srel >>= 16;
+ x = bfd_get_16 (input_bfd, contents);
+ x = (x & 0xfff0) | (srel & 0xf);
+ bfd_put_16 (input_bfd, x, contents);
+ break;
+
+ case R_MSP430X_ABS20_EXT_ODST:
+ /* [0,4]+[48,16] = ---F ---- ---- FFFF */
+ contents += rel->r_offset;
+ srel = (bfd_signed_vma) relocation;
+ if (is_rel_reloc)
+ {
+ bfd_vma addend;
+ addend = (bfd_get_16 (input_bfd, contents) & 0xf) << 16;
+ addend |= bfd_get_16 (input_bfd, contents + 6);
+ srel += addend;
+ }
+ else
+ srel += rel->r_addend;
+ bfd_put_16 (input_bfd, (srel & 0xffff), contents + 6);
+ srel >>= 16;
+ x = bfd_get_16 (input_bfd, contents);
+ x = (x & 0xfff0) | (srel & 0xf);
+ bfd_put_16 (input_bfd, x, contents);
+ break;
+
+ case R_MSP430X_ABS20_ADR_SRC:
+ /* [8,4]+[16,16] = -F-- FFFF */
+ contents += rel->r_offset;
+ srel = (bfd_signed_vma) relocation;
+ if (is_rel_reloc)
+ {
+ bfd_vma addend;
+
+ addend = ((bfd_get_16 (input_bfd, contents) & 0xf00) << 8);
+ addend |= bfd_get_16 (input_bfd, contents + 2);
+ srel += addend;
+ }
+ else
+ srel += rel->r_addend;
+ bfd_put_16 (input_bfd, (srel & 0xffff), contents + 2);
+ srel >>= 16;
+ x = bfd_get_16 (input_bfd, contents);
+ x = (x & 0xf0ff) | ((srel << 8) & 0x0f00);
+ bfd_put_16 (input_bfd, x, contents);
+ break;
+
+ case R_MSP430X_ABS20_ADR_DST:
+ /* [0,4]+[16,16] = ---F FFFF */
+ contents += rel->r_offset;
+ srel = (bfd_signed_vma) relocation;
+ if (is_rel_reloc)
+ {
+ bfd_vma addend;
+ addend = ((bfd_get_16 (input_bfd, contents) & 0xf) << 16);
+ addend |= bfd_get_16 (input_bfd, contents + 2);
+ srel += addend;
+ }
+ else
+ srel += rel->r_addend;
+ bfd_put_16 (input_bfd, (srel & 0xffff), contents + 2);
+ srel >>= 16;
+ x = bfd_get_16 (input_bfd, contents);
+ x = (x & 0xfff0) | (srel & 0xf);
+ bfd_put_16 (input_bfd, x, contents);
+ break;
+
+ case R_MSP430X_ABS16:
+ contents += rel->r_offset;
+ srel = (bfd_signed_vma) relocation;
+ if (is_rel_reloc)
+ srel += bfd_get_16 (input_bfd, contents);
+ else
+ srel += rel->r_addend;
+ x = srel;
+ if (x > 0xffff)
+ return bfd_reloc_overflow;
+ bfd_put_16 (input_bfd, srel & 0xffff, contents);
+ break;
+
+ case R_MSP430_ABS_HI16:
+ /* The EABI specifies that this must be a RELA reloc. */
+ BFD_ASSERT (! is_rel_reloc);
+ contents += rel->r_offset;
+ srel = (bfd_signed_vma) relocation;
+ srel += rel->r_addend;
+ bfd_put_16 (input_bfd, (srel >> 16) & 0xffff, contents);
+ break;
+
+ case R_MSP430X_PCR20_CALL:
+ /* [0,4]+[16,16] = ---F FFFF*/
+ contents += rel->r_offset;
+ srel = (bfd_signed_vma) relocation;
+ if (is_rel_reloc)
+ {
+ bfd_vma addend;
+ addend = (bfd_get_16 (input_bfd, contents) & 0xf) << 16;
+ addend |= bfd_get_16 (input_bfd, contents + 2);
+ srel += addend;
+ }
+ else
+ srel += rel->r_addend;
+ srel -= rel->r_offset;
+ srel -= (input_section->output_section->vma +
+ input_section->output_offset);
+ bfd_put_16 (input_bfd, srel & 0xffff, contents + 2);
+ srel >>= 16;
+ x = bfd_get_16 (input_bfd, contents);
+ x = (x & 0xfff0) | (srel & 0xf);
+ bfd_put_16 (input_bfd, x, contents);
+ break;
+
+ case R_MSP430X_PCR16:
+ contents += rel->r_offset;
+ srel = (bfd_signed_vma) relocation;
+ if (is_rel_reloc)
+ srel += bfd_get_16 (input_bfd, contents);
+ else
+ srel += rel->r_addend;
+ srel -= rel->r_offset;
+ srel -= (input_section->output_section->vma +
+ input_section->output_offset);
+ bfd_put_16 (input_bfd, srel & 0xffff, contents);
+ break;
+
+ case R_MSP430_PREL31:
+ contents += rel->r_offset;
+ srel = (bfd_signed_vma) relocation;
+ if (is_rel_reloc)
+ srel += (bfd_get_32 (input_bfd, contents) & 0x7fffffff);
+ else
+ srel += rel->r_addend;
+ srel += rel->r_addend;
+ x = bfd_get_32 (input_bfd, contents);
+ x = (x & 0x80000000) | ((srel >> 31) & 0x7fffffff);
+ bfd_put_32 (input_bfd, x, contents);
+ break;
+
+ default:
+ r = _bfd_final_link_relocate (howto, input_bfd, input_section,
+ contents, rel->r_offset,
+ relocation, rel->r_addend);
+ }
+ else
+ switch (howto->type)
+ {
case R_MSP430_10_PCREL:
contents += rel->r_offset;
srel = (bfd_signed_vma) relocation;
/* MSP430 addresses commands as words. */
srel >>= 1;
+ /* Check for an overflow. */
+ if (srel < -512 || srel > 511)
+ {
+ if (info->disable_target_specific_optimizations < 0)
+ {
+ static bfd_boolean warned = FALSE;
+ if (! warned)
+ {
+ info->callbacks->warning
+ (info,
+ _("try enabling relaxation to avoid relocation truncations"),
+ NULL, input_bfd, input_section, relocation);
+ warned = TRUE;
+ }
+ }
+ return bfd_reloc_overflow;
+ }
+
+ x = bfd_get_16 (input_bfd, contents);
+ x = (x & 0xfc00) | (srel & 0x3ff);
+ bfd_put_16 (input_bfd, x, contents);
+ break;
+
+ case R_MSP430_2X_PCREL:
+ contents += rel->r_offset;
+ srel = (bfd_signed_vma) relocation;
+ srel += rel->r_addend;
+ srel -= rel->r_offset;
+ srel -= 2; /* Branch instructions add 2 to the PC... */
+ srel -= (input_section->output_section->vma +
+ input_section->output_offset);
+
+ if (srel & 1)
+ return bfd_reloc_outofrange;
+
+ /* MSP430 addresses commands as words. */
+ srel >>= 1;
+
/* Check for an overflow. */
if (srel < -512 || srel > 511)
return bfd_reloc_overflow;
x = bfd_get_16 (input_bfd, contents);
x = (x & 0xfc00) | (srel & 0x3ff);
bfd_put_16 (input_bfd, x, contents);
+ /* Handle second jump instruction. */
+ x = bfd_get_16 (input_bfd, contents - 2);
+ srel += 1;
+ x = (x & 0xfc00) | (srel & 0x3ff);
+ bfd_put_16 (input_bfd, x, contents - 2);
break;
+ case R_MSP430_RL_PCREL:
case R_MSP430_16_PCREL:
contents += rel->r_offset;
srel = (bfd_signed_vma) relocation;
bfd_put_16 (input_bfd, srel & 0xffff, contents);
break;
- default:
- r = _bfd_final_link_relocate (howto, input_bfd, input_section,
- contents, rel->r_offset,
- relocation, rel->r_addend);
- }
+ case R_MSP430_8:
+ contents += rel->r_offset;
+ srel = (bfd_signed_vma) relocation;
+ srel += rel->r_addend;
+
+ bfd_put_8 (input_bfd, srel & 0xff, contents);
+ break;
+
+ case R_MSP430_SYM_DIFF:
+ case R_MSP430_GNU_SUB_ULEB128:
+ /* Cache the input section and value.
+ The offset is unreliable, since relaxation may
+ have reduced the following reloc's offset. */
+ sym_diff_section = input_section;
+ sym_diff_value = relocation + (howto->type == R_MSP430_GNU_SUB_ULEB128
+ ? rel->r_addend : 0);
+ return bfd_reloc_ok;
+
+ default:
+ r = _bfd_final_link_relocate (howto, input_bfd, input_section,
+ contents, rel->r_offset,
+ relocation, rel->r_addend);
+ }
return r;
}
/* Relocate an MSP430 ELF section. */
static bfd_boolean
-elf32_msp430_relocate_section (output_bfd, info, input_bfd, input_section,
- contents, relocs, local_syms, local_sections)
- bfd *output_bfd ATTRIBUTE_UNUSED;
- struct bfd_link_info *info;
- bfd *input_bfd;
- asection *input_section;
- bfd_byte *contents;
- Elf_Internal_Rela *relocs;
- Elf_Internal_Sym *local_syms;
- asection **local_sections;
+elf32_msp430_relocate_section (bfd * output_bfd ATTRIBUTE_UNUSED,
+ struct bfd_link_info * info,
+ bfd * input_bfd,
+ asection * input_section,
+ bfd_byte * contents,
+ Elf_Internal_Rela * relocs,
+ Elf_Internal_Sym * local_syms,
+ asection ** local_sections)
{
Elf_Internal_Shdr *symtab_hdr;
struct elf_link_hash_entry **sym_hashes;
const char *name = NULL;
int r_type;
- /* This is a final link. */
-
r_type = ELF32_R_TYPE (rel->r_info);
r_symndx = ELF32_R_SYM (rel->r_info);
- howto = elf_msp430_howto_table + ELF32_R_TYPE (rel->r_info);
+
+ if (uses_msp430x_relocs (input_bfd))
+ howto = elf_msp430x_howto_table + r_type;
+ else
+ howto = elf_msp430_howto_table + r_type;
+
h = NULL;
sym = NULL;
sec = NULL;
name = bfd_elf_string_from_elf_section
(input_bfd, symtab_hdr->sh_link, sym->st_name);
- name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
+ name = name == NULL || *name == 0 ? bfd_section_name (sec) : name;
}
else
{
- bfd_boolean unresolved_reloc, warned;
+ bfd_boolean unresolved_reloc, warned, ignored;
- RELOC_FOR_GLOBAL_SYMBOL (h, sym_hashes, r_symndx, symtab_hdr,
- relocation, sec, unresolved_reloc,
- info, warned);
+ RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
+ r_symndx, symtab_hdr, sym_hashes,
+ h, sec, relocation,
+ unresolved_reloc, warned, ignored);
+ name = h->root.root.string;
}
+ if (sec != NULL && discarded_section (sec))
+ RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
+ rel, 1, relend, howto, 0, contents);
+
+ if (bfd_link_relocatable (info))
+ continue;
+
r = msp430_final_link_relocate (howto, input_bfd, input_section,
- contents, rel, relocation);
+ contents, rel, relocation, info);
if (r != bfd_reloc_ok)
{
switch (r)
{
case bfd_reloc_overflow:
- r = info->callbacks->reloc_overflow
- (info, name, howto->name, (bfd_vma) 0,
- input_bfd, input_section, rel->r_offset);
+ (*info->callbacks->reloc_overflow)
+ (info, (h ? &h->root : NULL), name, howto->name,
+ (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
break;
case bfd_reloc_undefined:
- r = info->callbacks->undefined_symbol
- (info, name, input_bfd, input_section, rel->r_offset, TRUE);
+ (*info->callbacks->undefined_symbol)
+ (info, name, input_bfd, input_section, rel->r_offset, TRUE);
break;
case bfd_reloc_outofrange:
- msg = _("internal error: out of range error");
+ msg = _("internal error: branch/jump to an odd address detected");
break;
case bfd_reloc_notsupported:
}
if (msg)
- r = info->callbacks->warning
- (info, msg, name, input_bfd, input_section, rel->r_offset);
-
- if (!r)
- return FALSE;
+ (*info->callbacks->warning) (info, msg, name, input_bfd,
+ input_section, rel->r_offset);
}
}
file. This gets the MSP430 architecture right based on the machine
number. */
-static void
-bfd_elf_msp430_final_write_processing (abfd, linker)
- bfd *abfd;
- bfd_boolean linker ATTRIBUTE_UNUSED;
+static bfd_boolean
+bfd_elf_msp430_final_write_processing (bfd *abfd)
{
unsigned long val;
switch (bfd_get_mach (abfd))
{
default:
- case bfd_mach_msp110:
- val = E_MSP430_MACH_MSP430x11x1;
- break;
+ case bfd_mach_msp110: val = E_MSP430_MACH_MSP430x11x1; break;
+ case bfd_mach_msp11: val = E_MSP430_MACH_MSP430x11; break;
+ case bfd_mach_msp12: val = E_MSP430_MACH_MSP430x12; break;
+ case bfd_mach_msp13: val = E_MSP430_MACH_MSP430x13; break;
+ case bfd_mach_msp14: val = E_MSP430_MACH_MSP430x14; break;
+ case bfd_mach_msp15: val = E_MSP430_MACH_MSP430x15; break;
+ case bfd_mach_msp16: val = E_MSP430_MACH_MSP430x16; break;
+ case bfd_mach_msp31: val = E_MSP430_MACH_MSP430x31; break;
+ case bfd_mach_msp32: val = E_MSP430_MACH_MSP430x32; break;
+ case bfd_mach_msp33: val = E_MSP430_MACH_MSP430x33; break;
+ case bfd_mach_msp41: val = E_MSP430_MACH_MSP430x41; break;
+ case bfd_mach_msp42: val = E_MSP430_MACH_MSP430x42; break;
+ case bfd_mach_msp43: val = E_MSP430_MACH_MSP430x43; break;
+ case bfd_mach_msp44: val = E_MSP430_MACH_MSP430x44; break;
+ case bfd_mach_msp20: val = E_MSP430_MACH_MSP430x20; break;
+ case bfd_mach_msp22: val = E_MSP430_MACH_MSP430x22; break;
+ case bfd_mach_msp23: val = E_MSP430_MACH_MSP430x23; break;
+ case bfd_mach_msp24: val = E_MSP430_MACH_MSP430x24; break;
+ case bfd_mach_msp26: val = E_MSP430_MACH_MSP430x26; break;
+ case bfd_mach_msp46: val = E_MSP430_MACH_MSP430x46; break;
+ case bfd_mach_msp47: val = E_MSP430_MACH_MSP430x47; break;
+ case bfd_mach_msp54: val = E_MSP430_MACH_MSP430x54; break;
+ case bfd_mach_msp430x: val = E_MSP430_MACH_MSP430X; break;
+ }
- case bfd_mach_msp11:
- val = E_MSP430_MACH_MSP430x11;
- break;
+ elf_elfheader (abfd)->e_machine = EM_MSP430;
+ elf_elfheader (abfd)->e_flags &= ~EF_MSP430_MACH;
+ elf_elfheader (abfd)->e_flags |= val;
+ return _bfd_elf_final_write_processing (abfd);
+}
- case bfd_mach_msp12:
- val = E_MSP430_MACH_MSP430x12;
- break;
+/* Set the right machine number. */
- case bfd_mach_msp13:
- val = E_MSP430_MACH_MSP430x13;
- break;
+static bfd_boolean
+elf32_msp430_object_p (bfd * abfd)
+{
+ int e_set = bfd_mach_msp14;
- case bfd_mach_msp14:
- val = E_MSP430_MACH_MSP430x14;
- break;
+ if (elf_elfheader (abfd)->e_machine == EM_MSP430
+ || elf_elfheader (abfd)->e_machine == EM_MSP430_OLD)
+ {
+ int e_mach = elf_elfheader (abfd)->e_flags & EF_MSP430_MACH;
- case bfd_mach_msp15:
- val = E_MSP430_MACH_MSP430x15;
- break;
+ switch (e_mach)
+ {
+ default:
+ case E_MSP430_MACH_MSP430x11: e_set = bfd_mach_msp11; break;
+ case E_MSP430_MACH_MSP430x11x1: e_set = bfd_mach_msp110; break;
+ case E_MSP430_MACH_MSP430x12: e_set = bfd_mach_msp12; break;
+ case E_MSP430_MACH_MSP430x13: e_set = bfd_mach_msp13; break;
+ case E_MSP430_MACH_MSP430x14: e_set = bfd_mach_msp14; break;
+ case E_MSP430_MACH_MSP430x15: e_set = bfd_mach_msp15; break;
+ case E_MSP430_MACH_MSP430x16: e_set = bfd_mach_msp16; break;
+ case E_MSP430_MACH_MSP430x31: e_set = bfd_mach_msp31; break;
+ case E_MSP430_MACH_MSP430x32: e_set = bfd_mach_msp32; break;
+ case E_MSP430_MACH_MSP430x33: e_set = bfd_mach_msp33; break;
+ case E_MSP430_MACH_MSP430x41: e_set = bfd_mach_msp41; break;
+ case E_MSP430_MACH_MSP430x42: e_set = bfd_mach_msp42; break;
+ case E_MSP430_MACH_MSP430x43: e_set = bfd_mach_msp43; break;
+ case E_MSP430_MACH_MSP430x44: e_set = bfd_mach_msp44; break;
+ case E_MSP430_MACH_MSP430x20: e_set = bfd_mach_msp20; break;
+ case E_MSP430_MACH_MSP430x22: e_set = bfd_mach_msp22; break;
+ case E_MSP430_MACH_MSP430x23: e_set = bfd_mach_msp23; break;
+ case E_MSP430_MACH_MSP430x24: e_set = bfd_mach_msp24; break;
+ case E_MSP430_MACH_MSP430x26: e_set = bfd_mach_msp26; break;
+ case E_MSP430_MACH_MSP430x46: e_set = bfd_mach_msp46; break;
+ case E_MSP430_MACH_MSP430x47: e_set = bfd_mach_msp47; break;
+ case E_MSP430_MACH_MSP430x54: e_set = bfd_mach_msp54; break;
+ case E_MSP430_MACH_MSP430X: e_set = bfd_mach_msp430x; break;
+ }
+ }
- case bfd_mach_msp16:
- val = E_MSP430_MACH_MSP430x16;
- break;
+ return bfd_default_set_arch_mach (abfd, bfd_arch_msp430, e_set);
+}
- case bfd_mach_msp31:
- val = E_MSP430_MACH_MSP430x31;
- break;
+/* These functions handle relaxing for the msp430.
+ Relaxation required only in two cases:
+ - Bad hand coding like jumps from one section to another or
+ from file to file.
+ - Sibling calls. This will affect only 'jump label' polymorph. Without
+ relaxing this enlarges code by 2 bytes. Sibcalls implemented but
+ do not work in gcc's port by the reason I do not know.
+ - To convert out of range conditional jump instructions (found inside
+ a function) into inverted jumps over an unconditional branch instruction.
+ Anyway, if a relaxation required, user should pass -relax option to the
+ linker.
- case bfd_mach_msp32:
- val = E_MSP430_MACH_MSP430x32;
- break;
+ There are quite a few relaxing opportunities available on the msp430:
- case bfd_mach_msp33:
- val = E_MSP430_MACH_MSP430x33;
- break;
+ ================================================================
- case bfd_mach_msp41:
- val = E_MSP430_MACH_MSP430x41;
- break;
+ 1. 3 words -> 1 word
- case bfd_mach_msp42:
- val = E_MSP430_MACH_MSP430x42;
- break;
+ eq == jeq label jne +4; br lab
+ ne != jne label jeq +4; br lab
+ lt < jl label jge +4; br lab
+ ltu < jlo label lhs +4; br lab
+ ge >= jge label jl +4; br lab
+ geu >= jhs label jlo +4; br lab
- case bfd_mach_msp43:
- val = E_MSP430_MACH_MSP430x43;
- break;
+ 2. 4 words -> 1 word
- case bfd_mach_msp44:
- val = E_MSP430_MACH_MSP430x44;
- break;
+ ltn < jn jn +2; jmp +4; br lab
+
+ 3. 4 words -> 2 words
+
+ gt > jeq +2; jge label jeq +6; jl +4; br label
+ gtu > jeq +2; jhs label jeq +6; jlo +4; br label
+
+ 4. 4 words -> 2 words and 2 labels
+
+ leu <= jeq label; jlo label jeq +2; jhs +4; br label
+ le <= jeq label; jl label jeq +2; jge +4; br label
+ =================================================================
+
+ codemap for first cases is (labels masked ):
+ eq: 0x2002,0x4010,0x0000 -> 0x2400
+ ne: 0x2402,0x4010,0x0000 -> 0x2000
+ lt: 0x3402,0x4010,0x0000 -> 0x3800
+ ltu: 0x2c02,0x4010,0x0000 -> 0x2800
+ ge: 0x3802,0x4010,0x0000 -> 0x3400
+ geu: 0x2802,0x4010,0x0000 -> 0x2c00
+
+ second case:
+ ltn: 0x3001,0x3c02,0x4010,0x0000 -> 0x3000
+
+ third case:
+ gt: 0x2403,0x3802,0x4010,0x0000 -> 0x2401,0x3400
+ gtu: 0x2403,0x2802,0x4010,0x0000 -> 0x2401,0x2c00
+
+ fourth case:
+ leu: 0x2401,0x2c02,0x4010,0x0000 -> 0x2400,0x2800
+ le: 0x2401,0x3402,0x4010,0x0000 -> 0x2400,0x3800
+
+ Unspecified case :)
+ jump: 0x4010,0x0000 -> 0x3c00. */
+
+#define NUMB_RELAX_CODES 12
+static struct rcodes_s
+{
+ int f0, f1; /* From code. */
+ int t0, t1; /* To code. */
+ int labels; /* Position of labels: 1 - one label at first
+ word, 2 - one at second word, 3 - two
+ labels at both. */
+ int cdx; /* Words to match. */
+ int bs; /* Shrink bytes. */
+ int off; /* Offset from old label for new code. */
+ int ncl; /* New code length. */
+} rcode[] =
+{/* lab,cdx,bs,off,ncl */
+ { 0x0000, 0x0000, 0x3c00, 0x0000, 1, 0, 2, 2, 2}, /* jump */
+ { 0x0000, 0x2002, 0x2400, 0x0000, 1, 1, 4, 4, 2}, /* eq */
+ { 0x0000, 0x2402, 0x2000, 0x0000, 1, 1, 4, 4, 2}, /* ne */
+ { 0x0000, 0x3402, 0x3800, 0x0000, 1, 1, 4, 4, 2}, /* lt */
+ { 0x0000, 0x2c02, 0x2800, 0x0000, 1, 1, 4, 4, 2}, /* ltu */
+ { 0x0000, 0x3802, 0x3400, 0x0000, 1, 1, 4, 4, 2}, /* ge */
+ { 0x0000, 0x2802, 0x2c00, 0x0000, 1, 1, 4, 4, 2}, /* geu */
+ { 0x3001, 0x3c02, 0x3000, 0x0000, 1, 2, 6, 6, 2}, /* ltn */
+ { 0x2403, 0x3802, 0x2401, 0x3400, 2, 2, 4, 6, 4}, /* gt */
+ { 0x2403, 0x2802, 0x2401, 0x2c00, 2, 2, 4, 6, 4}, /* gtu */
+ { 0x2401, 0x2c02, 0x2400, 0x2800, 3, 2, 4, 6, 4}, /* leu , 2 labels */
+ { 0x2401, 0x2c02, 0x2400, 0x2800, 3, 2, 4, 6, 4}, /* le , 2 labels */
+ { 0, 0, 0, 0, 0, 0, 0, 0, 0}
+};
+
+/* Return TRUE if a symbol exists at the given address. */
+
+static bfd_boolean
+msp430_elf_symbol_address_p (bfd * abfd,
+ asection * sec,
+ Elf_Internal_Sym * isym,
+ bfd_vma addr)
+{
+ Elf_Internal_Shdr *symtab_hdr;
+ unsigned int sec_shndx;
+ Elf_Internal_Sym *isymend;
+ struct elf_link_hash_entry **sym_hashes;
+ struct elf_link_hash_entry **end_hashes;
+ unsigned int symcount;
+
+ sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
+
+ /* Examine all the local symbols. */
+ symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
+ for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++)
+ if (isym->st_shndx == sec_shndx && isym->st_value == addr)
+ return TRUE;
+
+ symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
+ - symtab_hdr->sh_info);
+ sym_hashes = elf_sym_hashes (abfd);
+ end_hashes = sym_hashes + symcount;
+ for (; sym_hashes < end_hashes; sym_hashes++)
+ {
+ struct elf_link_hash_entry *sym_hash = *sym_hashes;
+
+ if ((sym_hash->root.type == bfd_link_hash_defined
+ || sym_hash->root.type == bfd_link_hash_defweak)
+ && sym_hash->root.u.def.section == sec
+ && sym_hash->root.u.def.value == addr)
+ return TRUE;
}
- elf_elfheader (abfd)->e_machine = EM_MSP430;
- elf_elfheader (abfd)->e_flags &= ~EF_MSP430_MACH;
- elf_elfheader (abfd)->e_flags |= val;
+ return FALSE;
}
-/* Set the right machine number. */
+/* Adjust all local symbols defined as '.section + 0xXXXX' (.section has
+ sec_shndx) referenced from current and other sections. */
static bfd_boolean
-elf32_msp430_object_p (abfd)
- bfd *abfd;
+msp430_elf_relax_adjust_locals (bfd * abfd, asection * sec, bfd_vma addr,
+ int count, unsigned int sec_shndx,
+ bfd_vma toaddr)
{
- int e_set = bfd_mach_msp14;
+ Elf_Internal_Shdr *symtab_hdr;
+ Elf_Internal_Rela *irel;
+ Elf_Internal_Rela *irelend;
+ Elf_Internal_Sym *isym;
- if (elf_elfheader (abfd)->e_machine == EM_MSP430
- || elf_elfheader (abfd)->e_machine == EM_MSP430_OLD)
+ irel = elf_section_data (sec)->relocs;
+ if (irel == NULL)
+ return TRUE;
+
+ irelend = irel + sec->reloc_count;
+ symtab_hdr = & elf_tdata (abfd)->symtab_hdr;
+ isym = (Elf_Internal_Sym *) symtab_hdr->contents;
+
+ for (;irel < irelend; irel++)
{
- int e_mach = elf_elfheader (abfd)->e_flags & EF_MSP430_MACH;
+ unsigned int sidx = ELF32_R_SYM(irel->r_info);
+ Elf_Internal_Sym *lsym = isym + sidx;
+
+ /* Adjust symbols referenced by .sec+0xXX. */
+ if (irel->r_addend > addr && irel->r_addend < toaddr
+ && sidx < symtab_hdr->sh_info
+ && lsym->st_shndx == sec_shndx)
+ irel->r_addend -= count;
+ }
- switch (e_mach)
+ return TRUE;
+}
+
+/* Delete some bytes from a section while relaxing. */
+
+static bfd_boolean
+msp430_elf_relax_delete_bytes (bfd * abfd, asection * sec, bfd_vma addr,
+ int count)
+{
+ Elf_Internal_Shdr *symtab_hdr;
+ unsigned int sec_shndx;
+ bfd_byte *contents;
+ Elf_Internal_Rela *irel;
+ Elf_Internal_Rela *irelend;
+ bfd_vma toaddr;
+ Elf_Internal_Sym *isym;
+ Elf_Internal_Sym *isymend;
+ struct elf_link_hash_entry **sym_hashes;
+ struct elf_link_hash_entry **end_hashes;
+ unsigned int symcount;
+ asection *p;
+
+ sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
+
+ contents = elf_section_data (sec)->this_hdr.contents;
+
+ toaddr = sec->size;
+ if (debug_relocs)
+ printf (" deleting %d bytes between 0x%lx to 0x%lx\n",
+ count, (long) addr, (long) toaddr);
+
+ irel = elf_section_data (sec)->relocs;
+ irelend = irel + sec->reloc_count;
+
+ /* Actually delete the bytes. */
+ memmove (contents + addr, contents + addr + count,
+ (size_t) (toaddr - addr - count));
+ sec->size -= count;
+
+ /* Adjust all the relocs. */
+ symtab_hdr = & elf_tdata (abfd)->symtab_hdr;
+ isym = (Elf_Internal_Sym *) symtab_hdr->contents;
+ for (; irel < irelend; irel++)
+ {
+ /* Get the new reloc address. */
+ if ((irel->r_offset > addr && irel->r_offset < toaddr))
+ irel->r_offset -= count;
+ }
+
+ for (p = abfd->sections; p != NULL; p = p->next)
+ msp430_elf_relax_adjust_locals (abfd,p,addr,count,sec_shndx,toaddr);
+
+ /* Adjust the local symbols defined in this section. */
+ symtab_hdr = & elf_tdata (abfd)->symtab_hdr;
+ isym = (Elf_Internal_Sym *) symtab_hdr->contents;
+ for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++)
+ {
+ const char * name;
+
+ name = bfd_elf_string_from_elf_section
+ (abfd, symtab_hdr->sh_link, isym->st_name);
+ name = name == NULL || *name == 0 ? bfd_section_name (sec) : name;
+
+ if (isym->st_shndx != sec_shndx)
+ continue;
+
+ if (isym->st_value > addr
+ && (isym->st_value < toaddr
+ /* We also adjust a symbol at the end of the section if its name is
+ on the list below. These symbols are used for debug info
+ generation and they refer to the end of the current section, not
+ the start of the next section. */
+ || (isym->st_value == toaddr
+ && name != NULL
+ && (CONST_STRNEQ (name, ".Letext")
+ || CONST_STRNEQ (name, ".LFE")))))
{
- default:
- case E_MSP430_MACH_MSP430x11:
- e_set = bfd_mach_msp11;
- break;
+ if (debug_relocs)
+ printf (" adjusting value of local symbol %s from 0x%lx ",
+ name, (long) isym->st_value);
+ if (isym->st_value < addr + count)
+ isym->st_value = addr;
+ else
+ isym->st_value -= count;
+ if (debug_relocs)
+ printf ("to 0x%lx\n", (long) isym->st_value);
+ }
+ /* Adjust the function symbol's size as well. */
+ else if (ELF_ST_TYPE (isym->st_info) == STT_FUNC
+ && isym->st_value + isym->st_size > addr
+ && isym->st_value + isym->st_size < toaddr)
+ isym->st_size -= count;
+ }
- case E_MSP430_MACH_MSP430x11x1:
- e_set = bfd_mach_msp110;
- break;
+ /* Now adjust the global symbols defined in this section. */
+ symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
+ - symtab_hdr->sh_info);
+ sym_hashes = elf_sym_hashes (abfd);
+ end_hashes = sym_hashes + symcount;
+ for (; sym_hashes < end_hashes; sym_hashes++)
+ {
+ struct elf_link_hash_entry *sym_hash = *sym_hashes;
- case E_MSP430_MACH_MSP430x12:
- e_set = bfd_mach_msp12;
- break;
+ if ((sym_hash->root.type == bfd_link_hash_defined
+ || sym_hash->root.type == bfd_link_hash_defweak)
+ && sym_hash->root.u.def.section == sec
+ && sym_hash->root.u.def.value > addr
+ && sym_hash->root.u.def.value < toaddr)
+ {
+ if (sym_hash->root.u.def.value < addr + count)
+ sym_hash->root.u.def.value = addr;
+ else
+ sym_hash->root.u.def.value -= count;
+ }
+ /* Adjust the function symbol's size as well. */
+ else if (sym_hash->root.type == bfd_link_hash_defined
+ && sym_hash->root.u.def.section == sec
+ && sym_hash->type == STT_FUNC
+ && sym_hash->root.u.def.value + sym_hash->size > addr
+ && sym_hash->root.u.def.value + sym_hash->size < toaddr)
+ sym_hash->size -= count;
+ }
- case E_MSP430_MACH_MSP430x13:
- e_set = bfd_mach_msp13;
- break;
+ return TRUE;
+}
- case E_MSP430_MACH_MSP430x14:
- e_set = bfd_mach_msp14;
- break;
+/* Insert one or two words into a section whilst relaxing. */
- case E_MSP430_MACH_MSP430x15:
- e_set = bfd_mach_msp15;
- break;
+static bfd_byte *
+msp430_elf_relax_add_words (bfd * abfd, asection * sec, bfd_vma addr,
+ int num_words, int word1, int word2)
+{
+ Elf_Internal_Shdr *symtab_hdr;
+ unsigned int sec_shndx;
+ bfd_byte *contents;
+ Elf_Internal_Rela *irel;
+ Elf_Internal_Rela *irelend;
+ Elf_Internal_Sym *isym;
+ Elf_Internal_Sym *isymend;
+ struct elf_link_hash_entry **sym_hashes;
+ struct elf_link_hash_entry **end_hashes;
+ unsigned int symcount;
+ bfd_vma sec_end;
+ asection *p;
+ if (debug_relocs)
+ printf (" adding %d words at 0x%lx\n", num_words,
+ (long) (sec->output_section->vma + sec->output_offset + addr));
+
+ contents = elf_section_data (sec)->this_hdr.contents;
+ sec_end = sec->size;
+ int num_bytes = num_words * 2;
+
+ /* Make space for the new words. */
+ contents = bfd_realloc (contents, sec_end + num_bytes);
+ memmove (contents + addr + num_bytes, contents + addr, sec_end - addr);
+
+ /* Insert the new words. */
+ bfd_put_16 (abfd, word1, contents + addr);
+ if (num_words == 2)
+ bfd_put_16 (abfd, word2, contents + addr + 2);
+
+ /* Update the section information. */
+ sec->size += num_bytes;
+ elf_section_data (sec)->this_hdr.contents = contents;
+
+ /* Adjust all the relocs. */
+ irel = elf_section_data (sec)->relocs;
+ irelend = irel + sec->reloc_count;
+
+ for (; irel < irelend; irel++)
+ if ((irel->r_offset >= addr && irel->r_offset < sec_end))
+ irel->r_offset += num_bytes;
+
+ /* Adjust the local symbols defined in this section. */
+ sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
+ for (p = abfd->sections; p != NULL; p = p->next)
+ msp430_elf_relax_adjust_locals (abfd, p, addr, -num_bytes,
+ sec_shndx, sec_end);
+
+ /* Adjust the global symbols affected by the move. */
+ symtab_hdr = & elf_tdata (abfd)->symtab_hdr;
+ isym = (Elf_Internal_Sym *) symtab_hdr->contents;
+ for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++)
+ if (isym->st_shndx == sec_shndx
+ && isym->st_value >= addr && isym->st_value < sec_end)
+ {
+ if (debug_relocs)
+ printf (" adjusting value of local symbol %s from 0x%lx to "
+ "0x%lx\n", bfd_elf_string_from_elf_section
+ (abfd, symtab_hdr->sh_link, isym->st_name),
+ (long) isym->st_value, (long)(isym->st_value + num_bytes));
+ isym->st_value += num_bytes;
+ }
+
+ /* Now adjust the global symbols defined in this section. */
+ symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
+ - symtab_hdr->sh_info);
+ sym_hashes = elf_sym_hashes (abfd);
+ end_hashes = sym_hashes + symcount;
+ for (; sym_hashes < end_hashes; sym_hashes++)
+ {
+ struct elf_link_hash_entry *sym_hash = *sym_hashes;
+
+ if ((sym_hash->root.type == bfd_link_hash_defined
+ || sym_hash->root.type == bfd_link_hash_defweak)
+ && sym_hash->root.u.def.section == sec
+ && sym_hash->root.u.def.value >= addr
+ && sym_hash->root.u.def.value < sec_end)
+ sym_hash->root.u.def.value += num_bytes;
+ }
- case E_MSP430_MACH_MSP430x16:
- e_set = bfd_mach_msp16;
- break;
+ return contents;
+}
- case E_MSP430_MACH_MSP430x31:
- e_set = bfd_mach_msp31;
- break;
+static bfd_boolean
+msp430_elf_relax_section (bfd * abfd, asection * sec,
+ struct bfd_link_info * link_info,
+ bfd_boolean * again)
+{
+ Elf_Internal_Shdr * symtab_hdr;
+ Elf_Internal_Rela * internal_relocs;
+ Elf_Internal_Rela * irel;
+ Elf_Internal_Rela * irelend;
+ bfd_byte * contents = NULL;
+ Elf_Internal_Sym * isymbuf = NULL;
+
+ /* Assume nothing changes. */
+ *again = FALSE;
+
+ /* We don't have to do anything for a relocatable link, if
+ this section does not have relocs, or if this is not a
+ code section. */
+ if (bfd_link_relocatable (link_info)
+ || (sec->flags & SEC_RELOC) == 0
+ || sec->reloc_count == 0 || (sec->flags & SEC_CODE) == 0)
+ return TRUE;
- case E_MSP430_MACH_MSP430x32:
- e_set = bfd_mach_msp32;
- break;
+ if (debug_relocs)
+ printf ("Relaxing %s (%p), output_offset: 0x%lx sec size: 0x%lx\n",
+ sec->name, sec, (long) sec->output_offset, (long) sec->size);
- case E_MSP430_MACH_MSP430x33:
- e_set = bfd_mach_msp33;
- break;
+ symtab_hdr = & elf_tdata (abfd)->symtab_hdr;
- case E_MSP430_MACH_MSP430x41:
- e_set = bfd_mach_msp41;
- break;
+ /* Get a copy of the native relocations. */
+ internal_relocs =
+ _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL, link_info->keep_memory);
+ if (internal_relocs == NULL)
+ goto error_return;
- case E_MSP430_MACH_MSP430x42:
- e_set = bfd_mach_msp42;
- break;
+ /* Walk through them looking for relaxing opportunities. */
+ irelend = internal_relocs + sec->reloc_count;
- case E_MSP430_MACH_MSP430x43:
- e_set = bfd_mach_msp43;
- break;
+ if (debug_relocs)
+ printf (" trying code size growing relocs\n");
+ /* Do code size growing relocs first. */
+ for (irel = internal_relocs; irel < irelend; irel++)
+ {
+ bfd_vma symval;
+
+ /* If this isn't something that can be relaxed, then ignore
+ this reloc. */
+ if (uses_msp430x_relocs (abfd)
+ && ELF32_R_TYPE (irel->r_info) == (int) R_MSP430X_10_PCREL)
+ ;
+ else if (! uses_msp430x_relocs (abfd)
+ && ELF32_R_TYPE (irel->r_info) == (int) R_MSP430_10_PCREL)
+ ;
+ else
+ continue;
- case E_MSP430_MACH_MSP430x44:
- e_set = bfd_mach_msp44;
+ /* Get the section contents if we haven't done so already. */
+ if (contents == NULL)
+ {
+ /* Get cached copy if it exists. */
+ if (elf_section_data (sec)->this_hdr.contents != NULL)
+ contents = elf_section_data (sec)->this_hdr.contents;
+ else if (! bfd_malloc_and_get_section (abfd, sec, &contents))
+ goto error_return;
+ }
+
+ /* Read this BFD's local symbols if we haven't done so already. */
+ if (isymbuf == NULL && symtab_hdr->sh_info != 0)
+ {
+ isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
+ if (isymbuf == NULL)
+ isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
+ symtab_hdr->sh_info, 0,
+ NULL, NULL, NULL);
+ if (isymbuf == NULL)
+ goto error_return;
+ }
+
+ /* Get the value of the symbol referred to by the reloc. */
+ if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
+ {
+ /* A local symbol. */
+ Elf_Internal_Sym *isym;
+ asection *sym_sec;
+
+ isym = isymbuf + ELF32_R_SYM (irel->r_info);
+ if (isym->st_shndx == SHN_UNDEF)
+ sym_sec = bfd_und_section_ptr;
+ else if (isym->st_shndx == SHN_ABS)
+ sym_sec = bfd_abs_section_ptr;
+ else if (isym->st_shndx == SHN_COMMON)
+ sym_sec = bfd_com_section_ptr;
+ else
+ sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
+ symval = (isym->st_value
+ + sym_sec->output_section->vma + sym_sec->output_offset);
+
+ if (debug_relocs)
+ printf (" processing reloc at 0x%lx for local sym: %s "
+ "st_value: 0x%lx adj value: 0x%lx\n",
+ (long) (sec->output_offset + sec->output_section->vma
+ + irel->r_offset),
+ bfd_elf_string_from_elf_section (abfd, symtab_hdr->sh_link,
+ isym->st_name),
+ (long) isym->st_value, (long) symval);
+ }
+ else
+ {
+ unsigned long indx;
+ struct elf_link_hash_entry *h;
+
+ /* An external symbol. */
+ indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
+ h = elf_sym_hashes (abfd)[indx];
+ BFD_ASSERT (h != NULL);
+
+ if (h->root.type != bfd_link_hash_defined
+ && h->root.type != bfd_link_hash_defweak)
+ /* This appears to be a reference to an undefined
+ symbol. Just ignore it--it will be caught by the
+ regular reloc processing. */
+ continue;
+
+ symval = (h->root.u.def.value
+ + h->root.u.def.section->output_section->vma
+ + h->root.u.def.section->output_offset);
+ if (debug_relocs)
+ printf (" processing reloc at 0x%lx for global sym: %s "
+ "st_value: 0x%lx adj value: 0x%lx\n",
+ (long) (sec->output_offset + sec->output_section->vma
+ + irel->r_offset),
+ h->root.root.string, (long) h->root.u.def.value,
+ (long) symval);
+ }
+
+ /* For simplicity of coding, we are going to modify the section
+ contents, the section relocs, and the BFD symbol table. We
+ must tell the rest of the code not to free up this
+ information. It would be possible to instead create a table
+ of changes which have to be made, as is done in coff-mips.c;
+ that would be more work, but would require less memory when
+ the linker is run. */
+
+ bfd_signed_vma value = symval;
+ int opcode;
+
+ /* Compute the value that will be relocated. */
+ value += irel->r_addend;
+ /* Convert to PC relative. */
+ value -= (sec->output_section->vma + sec->output_offset);
+ value -= irel->r_offset;
+ value -= 2;
+
+ /* Scale. */
+ value >>= 1;
+
+ /* If it is in range then no modifications are needed. */
+ if (value >= -512 && value <= 511)
+ continue;
+
+ /* Get the opcode. */
+ opcode = bfd_get_16 (abfd, contents + irel->r_offset);
+
+ /* Compute the new opcode. We are going to convert:
+ JMP label
+ into:
+ BR[A] label
+ or
+ J<cond> label
+ into:
+ J<inv-cond> 1f
+ BR[A] #label
+ 1: */
+ switch (opcode & 0xfc00)
+ {
+ case 0x3800: opcode = 0x3402; break; /* Jl -> Jge +2 */
+ case 0x3400: opcode = 0x3802; break; /* Jge -> Jl +2 */
+ case 0x2c00: opcode = 0x2802; break; /* Jhs -> Jlo +2 */
+ case 0x2800: opcode = 0x2c02; break; /* Jlo -> Jhs +2 */
+ case 0x2400: opcode = 0x2002; break; /* Jeq -> Jne +2 */
+ case 0x2000: opcode = 0x2402; break; /* jne -> Jeq +2 */
+ case 0x3000: /* jn */
+ /* There is no direct inverse of the Jn insn.
+ FIXME: we could do this as:
+ Jn 1f
+ br 2f
+ 1: br label
+ 2: */
+ continue;
+ case 0x3c00:
+ if (uses_msp430x_relocs (abfd))
+ opcode = 0x0080; /* JMP -> BRA */
+ else
+ opcode = 0x4030; /* JMP -> BR */
break;
+ default:
+ /* Unhandled branch instruction. */
+ /* fprintf (stderr, "unrecog: %x\n", opcode); */
+ continue;
+ }
+
+ /* Note that we've changed the relocs, section contents, etc. */
+ elf_section_data (sec)->relocs = internal_relocs;
+ elf_section_data (sec)->this_hdr.contents = contents;
+ symtab_hdr->contents = (unsigned char *) isymbuf;
+
+ /* Install the new opcode. */
+ bfd_put_16 (abfd, opcode, contents + irel->r_offset);
+
+ /* Insert the new branch instruction. */
+ if (uses_msp430x_relocs (abfd))
+ {
+ if (debug_relocs)
+ printf (" R_MSP430X_10_PCREL -> R_MSP430X_ABS20_ADR_SRC "
+ "(growing with new opcode 0x%x)\n", opcode);
+
+ /* Insert an absolute branch (aka MOVA) instruction.
+ Note that bits 19:16 of the address are stored in the first word
+ of the insn, so this is where r_offset will point to. */
+ if (opcode == 0x0080)
+ {
+ /* If we're inserting a BRA because we are converting from a JMP,
+ then only add one word for destination address; the BRA opcode
+ has already been written. */
+ contents = msp430_elf_relax_add_words
+ (abfd, sec, irel->r_offset + 2, 1, 0x0000, 0);
+ }
+ else
+ {
+ contents = msp430_elf_relax_add_words
+ (abfd, sec, irel->r_offset + 2, 2, 0x0080, 0x0000);
+ /* Update the relocation to point to the inserted branch
+ instruction. Note - we are changing a PC-relative reloc
+ into an absolute reloc, but this is OK because we have
+ arranged with the assembler to have the reloc's value be
+ a (local) symbol, not a section+offset value. */
+ irel->r_offset += 2;
+ }
+
+ irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
+ R_MSP430X_ABS20_ADR_SRC);
+ }
+ else
+ {
+ if (debug_relocs)
+ printf (" R_MSP430_10_PCREL -> R_MSP430_16 "
+ "(growing with new opcode 0x%x)\n", opcode);
+ if (opcode == 0x4030)
+ {
+ /* If we're inserting a BR because we are converting from a JMP,
+ then only add one word for destination address; the BR opcode
+ has already been written. */
+ contents = msp430_elf_relax_add_words
+ (abfd, sec, irel->r_offset + 2, 1, 0x0000, 0);
+ irel->r_offset += 2;
+ }
+ else
+ {
+ contents = msp430_elf_relax_add_words
+ (abfd, sec, irel->r_offset + 2, 2, 0x4030, 0x0000);
+ /* See comment above about converting a 10-bit PC-rel
+ relocation into a 16-bit absolute relocation. */
+ irel->r_offset += 4;
+ }
+ irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
+ R_MSP430_16);
}
+
+ /* Growing the section may mean that other
+ conditional branches need to be fixed. */
+ *again = TRUE;
}
- return bfd_default_set_arch_mach (abfd, bfd_arch_msp430, e_set);
+ if (debug_relocs)
+ printf (" trying code size shrinking relocs\n");
+
+ for (irel = internal_relocs; irel < irelend; irel++)
+ {
+ bfd_vma symval;
+
+ /* Get the section contents if we haven't done so already. */
+ if (contents == NULL)
+ {
+ /* Get cached copy if it exists. */
+ if (elf_section_data (sec)->this_hdr.contents != NULL)
+ contents = elf_section_data (sec)->this_hdr.contents;
+ else if (! bfd_malloc_and_get_section (abfd, sec, &contents))
+ goto error_return;
+ }
+
+ /* Read this BFD's local symbols if we haven't done so already. */
+ if (isymbuf == NULL && symtab_hdr->sh_info != 0)
+ {
+ isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
+ if (isymbuf == NULL)
+ isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
+ symtab_hdr->sh_info, 0,
+ NULL, NULL, NULL);
+ if (isymbuf == NULL)
+ goto error_return;
+ }
+
+ /* Get the value of the symbol referred to by the reloc. */
+ if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
+ {
+ /* A local symbol. */
+ Elf_Internal_Sym *isym;
+ asection *sym_sec;
+
+ isym = isymbuf + ELF32_R_SYM (irel->r_info);
+ if (isym->st_shndx == SHN_UNDEF)
+ sym_sec = bfd_und_section_ptr;
+ else if (isym->st_shndx == SHN_ABS)
+ sym_sec = bfd_abs_section_ptr;
+ else if (isym->st_shndx == SHN_COMMON)
+ sym_sec = bfd_com_section_ptr;
+ else
+ sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
+ symval = (isym->st_value
+ + sym_sec->output_section->vma + sym_sec->output_offset);
+
+ if (debug_relocs)
+ printf (" processing reloc at 0x%lx for local sym: %s "
+ "st_value: 0x%lx adj value: 0x%lx\n",
+ (long) (sec->output_offset + sec->output_section->vma
+ + irel->r_offset),
+ bfd_elf_string_from_elf_section
+ (abfd, symtab_hdr->sh_link, isym->st_name),
+ (long) isym->st_value, (long) symval);
+ }
+ else
+ {
+ unsigned long indx;
+ struct elf_link_hash_entry *h;
+
+ /* An external symbol. */
+ indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
+ h = elf_sym_hashes (abfd)[indx];
+ BFD_ASSERT (h != NULL);
+
+ if (h->root.type != bfd_link_hash_defined
+ && h->root.type != bfd_link_hash_defweak)
+ /* This appears to be a reference to an undefined
+ symbol. Just ignore it--it will be caught by the
+ regular reloc processing. */
+ continue;
+
+ symval = (h->root.u.def.value
+ + h->root.u.def.section->output_section->vma
+ + h->root.u.def.section->output_offset);
+ if (debug_relocs)
+ printf (" processing reloc at 0x%lx for global sym: %s "
+ "st_value: 0x%lx adj value: 0x%lx\n", (long)
+ (sec->output_offset + sec->output_section->vma
+ + irel->r_offset),
+ h->root.root.string, (long) h->root.u.def.value,
+ (long) symval);
+ }
+
+ /* For simplicity of coding, we are going to modify the section
+ contents, the section relocs, and the BFD symbol table. We
+ must tell the rest of the code not to free up this
+ information. It would be possible to instead create a table
+ of changes which have to be made, as is done in coff-mips.c;
+ that would be more work, but would require less memory when
+ the linker is run. */
+
+ /* Try to turn a 16bit pc-relative branch into a 10bit pc-relative
+ branch. */
+ /* Paranoia? paranoia... */
+ if (! uses_msp430x_relocs (abfd)
+ && ELF32_R_TYPE (irel->r_info) == (int) R_MSP430_RL_PCREL)
+ {
+ bfd_vma value = symval;
+
+ /* Deal with pc-relative gunk. */
+ value -= (sec->output_section->vma + sec->output_offset);
+ value -= irel->r_offset;
+ value += irel->r_addend;
+
+ /* See if the value will fit in 10 bits, note the high value is
+ 1016 as the target will be two bytes closer if we are
+ able to relax. */
+ if ((long) value < 1016 && (long) value > -1016)
+ {
+ int code0 = 0, code1 = 0, code2 = 0;
+ int i;
+ struct rcodes_s *rx;
+
+ /* Get the opcode. */
+ if (irel->r_offset >= 6)
+ code0 = bfd_get_16 (abfd, contents + irel->r_offset - 6);
+
+ if (irel->r_offset >= 4)
+ code1 = bfd_get_16 (abfd, contents + irel->r_offset - 4);
+
+ code2 = bfd_get_16 (abfd, contents + irel->r_offset - 2);
+
+ if (code2 != 0x4010)
+ continue;
+
+ /* Check r4 and r3. */
+ for (i = NUMB_RELAX_CODES - 1; i >= 0; i--)
+ {
+ rx = &rcode[i];
+ if (rx->cdx == 2 && rx->f0 == code0 && rx->f1 == code1)
+ break;
+ else if (rx->cdx == 1 && rx->f1 == code1)
+ break;
+ else if (rx->cdx == 0) /* This is an unconditional jump. */
+ break;
+ }
+
+ /* Check labels:
+ .Label0: ; we do not care about this label
+ jeq +6
+ .Label1: ; make sure there is no label here
+ jl +4
+ .Label2: ; make sure there is no label here
+ br .Label_dst
+
+ So, if there is .Label1 or .Label2 we cannot relax this code.
+ This actually should not happen, cause for relaxable
+ instructions we use RL_PCREL reloc instead of 16_PCREL.
+ Will change this in the future. */
+
+ if (rx->cdx > 0
+ && msp430_elf_symbol_address_p (abfd, sec, isymbuf,
+ irel->r_offset - 2))
+ continue;
+ if (rx->cdx > 1
+ && msp430_elf_symbol_address_p (abfd, sec, isymbuf,
+ irel->r_offset - 4))
+ continue;
+
+ /* Note that we've changed the relocs, section contents, etc. */
+ elf_section_data (sec)->relocs = internal_relocs;
+ elf_section_data (sec)->this_hdr.contents = contents;
+ symtab_hdr->contents = (unsigned char *) isymbuf;
+
+ if (debug_relocs)
+ printf (" R_MSP430_RL_PCREL -> ");
+ /* Fix the relocation's type. */
+ if (uses_msp430x_relocs (abfd))
+ {
+ if (rx->labels == 3) /* Handle special cases. */
+ irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
+ R_MSP430X_2X_PCREL);
+ else
+ irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
+ R_MSP430X_10_PCREL);
+ }
+ else
+ {
+ if (rx->labels == 3) /* Handle special cases. */
+ {
+ irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
+ R_MSP430_2X_PCREL);
+ if (debug_relocs)
+ printf ("R_MSP430_2X_PCREL (shrinking with new opcode"
+ " 0x%x)\n", rx->t0);
+ }
+ else
+ {
+ irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
+ R_MSP430_10_PCREL);
+ if (debug_relocs)
+ printf ("R_MSP430_10_PCREL (shrinking with new opcode"
+ " 0x%x)\n", rx->t0);
+ }
+ }
+
+ /* Fix the opcode right way. */
+ bfd_put_16 (abfd, rx->t0, contents + irel->r_offset - rx->off);
+ if (rx->t1)
+ bfd_put_16 (abfd, rx->t1,
+ contents + irel->r_offset - rx->off + 2);
+
+ /* Delete bytes. */
+ if (!msp430_elf_relax_delete_bytes (abfd, sec,
+ irel->r_offset - rx->off +
+ rx->ncl, rx->bs))
+ goto error_return;
+
+ /* Handle unconditional jumps. */
+ if (rx->cdx == 0)
+ irel->r_offset -= 2;
+
+ /* That will change things, so, we should relax again.
+ Note that this is not required, and it may be slow. */
+ *again = TRUE;
+ }
+ }
+
+ /* Try to turn a 16-bit absolute branch into a 10-bit pc-relative
+ branch. */
+ if ((uses_msp430x_relocs (abfd)
+ && ELF32_R_TYPE (irel->r_info) == R_MSP430X_ABS16)
+ || (! uses_msp430x_relocs (abfd)
+ && ELF32_R_TYPE (irel->r_info) == R_MSP430_16))
+ {
+ bfd_vma value = symval;
+
+ value -= (sec->output_section->vma + sec->output_offset);
+ value -= irel->r_offset;
+ value += irel->r_addend;
+
+ /* See if the value will fit in 10 bits, note the high value is
+ 1016 as the target will be two bytes closer if we are
+ able to relax. */
+ if ((long) value < 1016 && (long) value > -1016)
+ {
+ int code1, code2, opcode;
+
+ /* Get the opcode. */
+ code2 = bfd_get_16 (abfd, contents + irel->r_offset - 2);
+ if (code2 != 0x4030) /* BR -> JMP */
+ continue;
+ /* FIXME: check r4 and r3 ? */
+ /* FIXME: Handle 0x4010 as well ? */
+
+ /* Note that we've changed the relocs, section contents, etc. */
+ elf_section_data (sec)->relocs = internal_relocs;
+ elf_section_data (sec)->this_hdr.contents = contents;
+ symtab_hdr->contents = (unsigned char *) isymbuf;
+
+ /* Fix the relocation's type. */
+ if (uses_msp430x_relocs (abfd))
+ {
+ irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
+ R_MSP430X_10_PCREL);
+ if (debug_relocs)
+ printf (" R_MSP430X_16 -> R_MSP430X_10_PCREL ");
+ }
+ else
+ {
+ irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
+ R_MSP430_10_PCREL);
+ if (debug_relocs)
+ printf (" R_MSP430_16 -> R_MSP430_10_PCREL ");
+ }
+ /* If we're trying to shrink a BR[A] after previously having
+ grown a JMP for this reloc, then we have a sequence like
+ this:
+ J<cond> 1f
+ BR[A]
+ 1:
+ The opcode for J<cond> has the target hard-coded as 2 words
+ ahead of the insn, instead of using a reloc.
+ This means we cannot rely on any of the helper functions to
+ update this hard-coded jump destination if we remove the
+ BR[A] insn, so we must explicitly update it here.
+ This does mean that we can remove the entire branch
+ instruction, and invert the conditional jump, saving us 4
+ bytes rather than only 2 if we detected this in the normal
+ way. */
+ code1 = bfd_get_16 (abfd, contents + irel->r_offset - 4);
+ switch (code1)
+ {
+ case 0x3802: opcode = 0x3401; break; /* Jl +2 -> Jge +1 */
+ case 0x3402: opcode = 0x3801; break; /* Jge +2 -> Jl +1 */
+ case 0x2c02: opcode = 0x2801; break; /* Jhs +2 -> Jlo +1 */
+ case 0x2802: opcode = 0x2c01; break; /* Jlo +2 -> Jhs +1 */
+ case 0x2402: opcode = 0x2001; break; /* Jeq +2 -> Jne +1 */
+ case 0x2002: opcode = 0x2401; break; /* jne +2 -> Jeq +1 */
+ case 0x3002: /* jn +2 */
+ /* FIXME: There is no direct inverse of the Jn insn. */
+ continue;
+ default:
+ /* The previous opcode does not have a hard-coded jump
+ that we added when previously relaxing, so relax the
+ current branch as normal. */
+ opcode = 0x3c00;
+ break;
+ }
+ if (debug_relocs)
+ printf ("(shrinking with new opcode 0x%x)\n", opcode);
+
+ if (opcode != 0x3c00)
+ {
+ /* Invert the opcode of the conditional jump. */
+ bfd_put_16 (abfd, opcode, contents + irel->r_offset - 4);
+ irel->r_offset -= 4;
+
+ /* Delete 4 bytes - the full BR insn. */
+ if (!msp430_elf_relax_delete_bytes (abfd, sec,
+ irel->r_offset + 2, 4))
+ goto error_return;
+ }
+ else
+ {
+ /* Fix the opcode right way. */
+ bfd_put_16 (abfd, opcode, contents + irel->r_offset - 2);
+ irel->r_offset -= 2;
+
+ /* Delete bytes. */
+ if (!msp430_elf_relax_delete_bytes (abfd, sec,
+ irel->r_offset + 2, 2))
+ goto error_return;
+ }
+
+ /* That will change things, so, we should relax again.
+ Note that this is not required, and it may be slow. */
+ *again = TRUE;
+ }
+ }
+ }
+
+ if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
+ {
+ if (!link_info->keep_memory)
+ free (isymbuf);
+ else
+ {
+ /* Cache the symbols for elf_link_input_bfd. */
+ symtab_hdr->contents = (unsigned char *) isymbuf;
+ }
+ }
+
+ if (contents != NULL
+ && elf_section_data (sec)->this_hdr.contents != contents)
+ {
+ if (!link_info->keep_memory)
+ free (contents);
+ else
+ {
+ /* Cache the section contents for elf_link_input_bfd. */
+ elf_section_data (sec)->this_hdr.contents = contents;
+ }
+ }
+
+ if (elf_section_data (sec)->relocs != internal_relocs)
+ free (internal_relocs);
+
+ return TRUE;
+
+ error_return:
+ if (symtab_hdr->contents != (unsigned char *) isymbuf)
+ free (isymbuf);
+ if (elf_section_data (sec)->this_hdr.contents != contents)
+ free (contents);
+ if (elf_section_data (sec)->relocs != internal_relocs)
+ free (internal_relocs);
+
+ return FALSE;
+}
+
+/* Handle an MSP430 specific section when reading an object file.
+ This is called when bfd_section_from_shdr finds a section with
+ an unknown type. */
+
+static bfd_boolean
+elf32_msp430_section_from_shdr (bfd *abfd,
+ Elf_Internal_Shdr * hdr,
+ const char *name,
+ int shindex)
+{
+ switch (hdr->sh_type)
+ {
+ case SHT_MSP430_SEC_FLAGS:
+ case SHT_MSP430_SYM_ALIASES:
+ case SHT_MSP430_ATTRIBUTES:
+ return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex);
+ default:
+ return FALSE;
+ }
+}
+
+static bfd_boolean
+elf32_msp430_obj_attrs_handle_unknown (bfd *abfd, int tag)
+{
+ _bfd_error_handler
+ /* xgettext:c-format */
+ (_("warning: %pB: unknown MSPABI object attribute %d"),
+ abfd, tag);
+ return TRUE;
+}
+
+/* Determine whether an object attribute tag takes an integer, a
+ string or both. */
+
+static int
+elf32_msp430_obj_attrs_arg_type (int tag)
+{
+ if (tag == Tag_compatibility)
+ return ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_STR_VAL;
+
+ if (tag < 32)
+ return ATTR_TYPE_FLAG_INT_VAL;
+
+ return (tag & 1) != 0 ? ATTR_TYPE_FLAG_STR_VAL : ATTR_TYPE_FLAG_INT_VAL;
+}
+
+static inline const char *
+isa_type (int isa)
+{
+ switch (isa)
+ {
+ case 1: return "MSP430";
+ case 2: return "MSP430X";
+ default: return "unknown";
+ }
+}
+
+static inline const char *
+code_model (int model)
+{
+ switch (model)
+ {
+ case 1: return "small";
+ case 2: return "large";
+ default: return "unknown";
+ }
+}
+
+static inline const char *
+data_model (int model)
+{
+ switch (model)
+ {
+ case 1: return "small";
+ case 2: return "large";
+ case 3: return "restricted large";
+ default: return "unknown";
+ }
}
-static void
-elf32_msp430_post_process_headers (abfd, link_info)
- bfd *abfd;
- struct bfd_link_info *link_info ATTRIBUTE_UNUSED;
+/* Merge MSPABI and GNU object attributes from IBFD into OBFD.
+ Raise an error if there are conflicting attributes. */
+
+static bfd_boolean
+elf32_msp430_merge_msp430_attributes (bfd *ibfd, struct bfd_link_info *info)
{
- Elf_Internal_Ehdr *i_ehdrp; /* ELF file header, internal form. */
+ bfd *obfd = info->output_bfd;
+ obj_attribute *in_msp_attr, *in_gnu_attr;
+ obj_attribute *out_msp_attr, *out_gnu_attr;
+ bfd_boolean result = TRUE;
+ static bfd * first_input_bfd = NULL;
+
+ /* Skip linker created files. */
+ if (ibfd->flags & BFD_LINKER_CREATED)
+ return TRUE;
+
+ /* LTO can create temporary files for linking which may not have an attribute
+ section. */
+ if (ibfd->lto_output
+ && bfd_get_section_by_name (ibfd, ".MSP430.attributes") == NULL)
+ return TRUE;
+
+ /* If this is the first real object just copy the attributes. */
+ if (!elf_known_obj_attributes_proc (obfd)[0].i)
+ {
+ _bfd_elf_copy_obj_attributes (ibfd, obfd);
+
+ out_msp_attr = elf_known_obj_attributes_proc (obfd);
- i_ehdrp = elf_elfheader (abfd);
+ /* Use the Tag_null value to indicate that
+ the attributes have been initialized. */
+ out_msp_attr[0].i = 1;
-#ifndef ELFOSABI_STANDALONE
-#define ELFOSABI_STANDALONE 255
-#endif
+ first_input_bfd = ibfd;
+ return TRUE;
+ }
+
+ in_msp_attr = elf_known_obj_attributes_proc (ibfd);
+ out_msp_attr = elf_known_obj_attributes_proc (obfd);
+ in_gnu_attr = elf_known_obj_attributes (ibfd) [OBJ_ATTR_GNU];
+ out_gnu_attr = elf_known_obj_attributes (obfd) [OBJ_ATTR_GNU];
+
+ /* The ISAs must be the same. */
+ if (in_msp_attr[OFBA_MSPABI_Tag_ISA].i != out_msp_attr[OFBA_MSPABI_Tag_ISA].i)
+ {
+ _bfd_error_handler
+ /* xgettext:c-format */
+ (_("error: %pB uses %s instructions but %pB uses %s"),
+ ibfd, isa_type (in_msp_attr[OFBA_MSPABI_Tag_ISA].i),
+ first_input_bfd, isa_type (out_msp_attr[OFBA_MSPABI_Tag_ISA].i));
+ result = FALSE;
+ }
- i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_STANDALONE;
+ /* The code models must be the same. */
+ if (in_msp_attr[OFBA_MSPABI_Tag_Code_Model].i
+ != out_msp_attr[OFBA_MSPABI_Tag_Code_Model].i)
+ {
+ _bfd_error_handler
+ /* xgettext:c-format */
+ (_("error: %pB uses the %s code model whereas %pB uses the %s code model"),
+ ibfd, code_model (in_msp_attr[OFBA_MSPABI_Tag_Code_Model].i),
+ first_input_bfd,
+ code_model (out_msp_attr[OFBA_MSPABI_Tag_Code_Model].i));
+ result = FALSE;
+ }
+
+ /* The large code model is only supported by the MSP430X. */
+ if (in_msp_attr[OFBA_MSPABI_Tag_Code_Model].i == 2
+ && out_msp_attr[OFBA_MSPABI_Tag_ISA].i != 2)
+ {
+ _bfd_error_handler
+ /* xgettext:c-format */
+ (_("error: %pB uses the large code model but %pB uses MSP430 instructions"),
+ ibfd, first_input_bfd);
+ result = FALSE;
+ }
+
+ /* The data models must be the same. */
+ if (in_msp_attr[OFBA_MSPABI_Tag_Data_Model].i
+ != out_msp_attr[OFBA_MSPABI_Tag_Data_Model].i)
+ {
+ _bfd_error_handler
+ /* xgettext:c-format */
+ (_("error: %pB uses the %s data model whereas %pB uses the %s data model"),
+ ibfd, data_model (in_msp_attr[OFBA_MSPABI_Tag_Data_Model].i),
+ first_input_bfd,
+ data_model (out_msp_attr[OFBA_MSPABI_Tag_Data_Model].i));
+ result = FALSE;
+ }
+
+ /* The small code model requires the use of the small data model. */
+ if (in_msp_attr[OFBA_MSPABI_Tag_Code_Model].i == 1
+ && out_msp_attr[OFBA_MSPABI_Tag_Data_Model].i != 1)
+ {
+ _bfd_error_handler
+ /* xgettext:c-format */
+ (_("error: %pB uses the small code model but %pB uses the %s data model"),
+ ibfd, first_input_bfd,
+ data_model (out_msp_attr[OFBA_MSPABI_Tag_Data_Model].i));
+ result = FALSE;
+ }
+
+ /* The large data models are only supported by the MSP430X. */
+ if (in_msp_attr[OFBA_MSPABI_Tag_Data_Model].i > 1
+ && out_msp_attr[OFBA_MSPABI_Tag_ISA].i != 2)
+ {
+ _bfd_error_handler
+ /* xgettext:c-format */
+ (_("error: %pB uses the %s data model but %pB only uses MSP430 instructions"),
+ ibfd, data_model (in_msp_attr[OFBA_MSPABI_Tag_Data_Model].i),
+ first_input_bfd);
+ result = FALSE;
+ }
+
+ /* Just ignore the data region unless the large memory model is in use.
+ We have already checked that ibfd and obfd use the same memory model. */
+ if ((in_msp_attr[OFBA_MSPABI_Tag_Code_Model].i
+ == OFBA_MSPABI_Val_Code_Model_LARGE)
+ && (in_msp_attr[OFBA_MSPABI_Tag_Data_Model].i
+ == OFBA_MSPABI_Val_Data_Model_LARGE))
+ {
+ /* We cannot allow "lower region only" to be linked with any other
+ values (i.e. ANY or NONE).
+ Before this attribute existed, "ANY" region was the default. */
+ bfd_boolean ibfd_lower_region_used
+ = (in_gnu_attr[Tag_GNU_MSP430_Data_Region].i
+ == Val_GNU_MSP430_Data_Region_Lower);
+ bfd_boolean obfd_lower_region_used
+ = (out_gnu_attr[Tag_GNU_MSP430_Data_Region].i
+ == Val_GNU_MSP430_Data_Region_Lower);
+ if (ibfd_lower_region_used != obfd_lower_region_used)
+ {
+ _bfd_error_handler
+ (_("error: %pB can use the upper region for data, "
+ "but %pB assumes data is exclusively in lower memory"),
+ ibfd_lower_region_used ? obfd : ibfd,
+ ibfd_lower_region_used ? ibfd : obfd);
+ result = FALSE;
+ }
+ }
+
+ return result;
}
+/* Merge backend specific data from an object file to the output
+ object file when linking. */
+
+static bfd_boolean
+elf32_msp430_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
+{
+ bfd *obfd = info->output_bfd;
+ /* Make sure that the machine number reflects the most
+ advanced version of the MSP architecture required. */
+#define max(a,b) ((a) > (b) ? (a) : (b))
+ if (bfd_get_mach (ibfd) != bfd_get_mach (obfd))
+ bfd_default_set_arch_mach (obfd, bfd_get_arch (obfd),
+ max (bfd_get_mach (ibfd), bfd_get_mach (obfd)));
+#undef max
+
+ return elf32_msp430_merge_msp430_attributes (ibfd, info);
+}
+
+static bfd_boolean
+msp430_elf_is_target_special_symbol (bfd *abfd, asymbol *sym)
+{
+ return _bfd_elf_is_local_label_name (abfd, sym->name);
+}
+
+static bfd_boolean
+uses_large_model (bfd *abfd)
+{
+ obj_attribute * attr;
+
+ if (abfd->flags & BFD_LINKER_CREATED)
+ return FALSE;
+
+ attr = elf_known_obj_attributes_proc (abfd);
+ if (attr == NULL)
+ return FALSE;
+
+ return attr[OFBA_MSPABI_Tag_Code_Model].i == 2;
+}
+
+static unsigned int
+elf32_msp430_eh_frame_address_size (bfd *abfd,
+ const asection *sec ATTRIBUTE_UNUSED)
+{
+ return uses_large_model (abfd) ? 4 : 2;
+}
+
+/* This is gross. The MSP430 EABI says that (sec 11.5):
+
+ "An implementation may choose to use Rel or Rela
+ type relocations for other relocations."
+
+ But it also says that:
+
+ "Certain relocations are identified as Rela only. [snip]
+ Where Rela is specified, an implementation must honor
+ this requirement."
+
+ There is one relocation marked as requiring RELA - R_MSP430_ABS_HI16 - but
+ to keep things simple we choose to use RELA relocations throughout. The
+ problem is that the TI compiler generates REL relocations, so we have to
+ be able to accept those as well. */
+
+#define elf_backend_may_use_rel_p 1
+#define elf_backend_may_use_rela_p 1
+#define elf_backend_default_use_rela_p 1
+
+#undef elf_backend_obj_attrs_vendor
+#define elf_backend_obj_attrs_vendor "mspabi"
+#undef elf_backend_obj_attrs_section
+#define elf_backend_obj_attrs_section ".MSP430.attributes"
+#undef elf_backend_obj_attrs_section_type
+#define elf_backend_obj_attrs_section_type SHT_MSP430_ATTRIBUTES
+#define elf_backend_section_from_shdr elf32_msp430_section_from_shdr
+#define elf_backend_obj_attrs_handle_unknown elf32_msp430_obj_attrs_handle_unknown
+#undef elf_backend_obj_attrs_arg_type
+#define elf_backend_obj_attrs_arg_type elf32_msp430_obj_attrs_arg_type
+#define bfd_elf32_bfd_merge_private_bfd_data elf32_msp430_merge_private_bfd_data
+#define elf_backend_eh_frame_address_size elf32_msp430_eh_frame_address_size
#define ELF_ARCH bfd_arch_msp430
#define ELF_MACHINE_CODE EM_MSP430
#define ELF_MACHINE_ALT1 EM_MSP430_OLD
-#define ELF_MAXPAGESIZE 1
+#define ELF_MAXPAGESIZE 4
+#define ELF_OSABI ELFOSABI_STANDALONE
-#define TARGET_LITTLE_SYM bfd_elf32_msp430_vec
+#define TARGET_LITTLE_SYM msp430_elf32_vec
#define TARGET_LITTLE_NAME "elf32-msp430"
-#define elf_info_to_howto msp430_info_to_howto_rela
-#define elf_info_to_howto_rel NULL
-#define elf_backend_relocate_section elf32_msp430_relocate_section
-#define elf_backend_gc_mark_hook elf32_msp430_gc_mark_hook
-#define elf_backend_gc_sweep_hook elf32_msp430_gc_sweep_hook
-#define elf_backend_check_relocs elf32_msp430_check_relocs
-#define elf_backend_can_gc_sections 1
+#define elf_info_to_howto msp430_info_to_howto_rela
+#define elf_info_to_howto_rel NULL
+#define elf_backend_relocate_section elf32_msp430_relocate_section
+#define elf_backend_check_relocs elf32_msp430_check_relocs
+#define elf_backend_can_gc_sections 1
#define elf_backend_final_write_processing bfd_elf_msp430_final_write_processing
#define elf_backend_object_p elf32_msp430_object_p
-#define elf_backend_post_process_headers elf32_msp430_post_process_headers
+#define bfd_elf32_bfd_relax_section msp430_elf_relax_section
+#define bfd_elf32_bfd_is_target_special_symbol msp430_elf_is_target_special_symbol
+
+#undef elf32_bed
+#define elf32_bed elf32_msp430_bed
+
+#include "elf32-target.h"
+
+/* The TI compiler sets the OSABI field to ELFOSABI_NONE. */
+#undef TARGET_LITTLE_SYM
+#define TARGET_LITTLE_SYM msp430_elf32_ti_vec
+
+#undef elf32_bed
+#define elf32_bed elf32_msp430_ti_bed
+
+#undef ELF_OSABI
+#define ELF_OSABI ELFOSABI_NONE
+
+static const struct bfd_elf_special_section msp430_ti_elf_special_sections[] =
+{
+ /* prefix, prefix_length, suffix_len, type, attributes. */
+ { STRING_COMMA_LEN (".TI.symbol.alias"), 0, SHT_MSP430_SYM_ALIASES, 0 },
+ { STRING_COMMA_LEN (".TI.section.flags"), 0, SHT_MSP430_SEC_FLAGS, 0 },
+ { STRING_COMMA_LEN ("_TI_build_attrib"), 0, SHT_MSP430_ATTRIBUTES, 0 },
+ { NULL, 0, 0, 0, 0 }
+};
+
+#undef elf_backend_special_sections
+#define elf_backend_special_sections msp430_ti_elf_special_sections
#include "elf32-target.h"
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