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authorJim Blandy <jimb@codesourcery.com>2005-07-14 22:52:28 +0000
committerJim Blandy <jimb@codesourcery.com>2005-07-14 22:52:28 +0000
commit005a587efe3382eb08cabe3d3f6ea82dfd3fb178 (patch)
tree853aab9eae7882251fa7a46dc88cede5122e9d87 /bfd/elf32-m32c.c
parent7fd2720ec698b3ca87297efb3094a7b795a08892 (diff)
downloadbinutils-redhat-005a587efe3382eb08cabe3d3f6ea82dfd3fb178.tar.gz
ChangeLog:
2005-07-14 Jim Blandy <jimb@redhat.com> * configure.in: Add cases for Renesas m32c. * configure: Regenerated. bfd/ChangeLog: 2005-07-14 Jim Blandy <jimb@redhat.com> Add support for m32c-*-elf (Renesas m32c and m16c). * Makefile.am (ALL_MACHINES): Add cpu-m32c.lo. (ALL_MACHINES_CFILES): Add cpu-m32c.c. (BFD32_BACKENDS): Add elf32-m32c.lo. (BFD32_BACKENDS_CFILES): Add elf32-m32c.c. (cpu-m32c.lo, elf32-m32c.lo): New rules, generated by 'make dep-am'. * Makefile.in: Regenerated. * archures.c (bfd_arch_m32c, bfd_mach_m16c, bfd_mach_m32c): New arch and mach codes. (bfd_m32c_arch): New arch info object. (bfd_archures_list): List bfd_m32c_arch. * bfd-in2.h: Regenerated. * config.bfd: Add case for the m32c. * configure.in: Add case for the m32c. * configure: Regenerated. * cpu-m32c.c, elf32-m32c.c: New files. * libbfd.h: Regenerated. * targets.c (bfd_elf32_m32c_vec): Declare. (_bfd_target_vector): List bfd_elf32_m32c_vec. binutils/ChangeLog: 2005-07-14 Jim Blandy <jimb@redhat.com> * readelf.c: #include "elf/m32c.h" (guess_is_rela, dump_relocations, get_machine_name): Add cases for EM_M32C. * Makefile.am (readelf.o): Update dependencies. * Makefile.in: Regenerated. cpu/ChangeLog: 2005-07-14 Jim Blandy <jimb@redhat.com> * m32c.cpu, m32c.opc: Machine description for the Renesas M32C. gas/ChangeLog: 2005-07-14 Jim Blandy <jimb@redhat.com> Add support for the Renesas M32C. * Makefile.am (CPU_TYPES): List m32c. (TARGET_CPU_CFILES): List config/tc-m32c.c. (TARGET_CPU_HFILES): List config/tc-m32c.h. * configure.in: Add case for m32c. * configure.tgt: Add cases for m32c and m32c-*-elf. * configure: Regenerated. * config/tc-m32c.c, config/tc-m32c.h: New files. * doc/Makefile.am (CPU_DOCS): Add c-m32c.texi. * doc/Makefile.in: Regenerated. * doc/all.texi: Set M32C. * doc/as.texinfo: Add text for the M32C-specific options and line comment characters, and refer to c-m32c.texi. * doc/c-m32c.texi: New file. include/ChangeLog: 2005-07-14 Jim Blandy <jimb@redhat.com> * dis-asm.h (print_insn_m32c): New declaration. include/elf/ChangeLog: 2005-07-14 Jim Blandy <jimb@redhat.com> Add support for Renesas M32C and M16C. * common.h (EM_M32C): New machine number. * m32c.h: New file. ld/ChangeLog: 2005-07-14 Jim Blandy <jimb@redhat.com> Add support for the Renesas M32C and M16C. * Makefile.am (ALL_EMULATIONS): Add eelf32m32c.o. (eelf32m32c.c): New target. * Makefile.in: Regenerated. * configure.tgt: Add case for m32c-*-elf. * emulparams/elf32m32c.sh: New file. opcodes/ChangeLog: 2005-07-14 Jim Blandy <jimb@redhat.com> Add support for the Renesas M32C and M16C. * m32c-asm.c, m32c-desc.c, m32c-dis.c, m32c-ibld.c, m32c-opc.c: New. * m32c-desc.h, m32c-opc.h: New. * Makefile.am (HFILES): List m32c-desc.h and m32c-opc.h. (CFILES): List m32c-asm.c, m32c-desc.c, m32c-dis.c, m32c-ibld.c, m32c-opc.c. (ALL_MACHINES): List m32c-asm.lo, m32c-desc.lo, m32c-dis.lo, m32c-ibld.lo, m32c-opc.lo. (CLEANFILES): List stamp-m32c. (M32C_DEPS): List stamp-m32c, if CGEN_MAINT. (CGEN_CPUS): Add m32c. (m32c-asm.c, m32c-desc.c, m32c-dis.c, m32c-ibld.c, m32c-opc.c) (m32c-desc.h, m32c-opc.h): Depend on M32C_DEPS. (m32c_opc_h): New variable. (stamp-m32c, m32c-asm.lo, m32c-desc.lo, m32c-dis.lo, m32c-ibld.lo) (m32c-opc.lo): New rules. * Makefile.in: Regenerated. * configure.in: Add case for bfd_m32c_arch. * configure: Regenerated. * disassemble.c (ARCH_m32c): New. [ARCH_m32c]: #include "m32c-desc.h". (disassembler) [ARCH_m32c]: Add case for bfd_arch_m32c. (disassemble_init_for_target) [ARCH_m32c]: Same. * cgen-ops.h, cgen-types.h: New files. * Makefile.am (HFILES): List them. * Makefile.in: Regenerated.
Diffstat (limited to 'bfd/elf32-m32c.c')
-rw-r--r--bfd/elf32-m32c.c1666
1 files changed, 1666 insertions, 0 deletions
diff --git a/bfd/elf32-m32c.c b/bfd/elf32-m32c.c
new file mode 100644
index 0000000000..3f9bb4e06c
--- /dev/null
+++ b/bfd/elf32-m32c.c
@@ -0,0 +1,1666 @@
+/* M16C/M32C specific support for 32-bit ELF.
+ Copyright (C) 2005
+ Free Software Foundation, Inc.
+
+ This file is part of BFD, the Binary File Descriptor library.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+
+#include "bfd.h"
+#include "sysdep.h"
+#include "libbfd.h"
+#include "elf-bfd.h"
+#include "elf/m32c.h"
+#include "libiberty.h"
+
+/* Forward declarations. */
+static reloc_howto_type * m32c_reloc_type_lookup
+ (bfd *, bfd_reloc_code_real_type);
+static void m32c_info_to_howto_rela
+ (bfd *, arelent *, Elf_Internal_Rela *);
+static bfd_boolean m32c_elf_relocate_section
+ (bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, Elf_Internal_Sym *, asection **);
+static bfd_boolean m32c_elf_gc_sweep_hook
+ (bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *);
+static asection * m32c_elf_gc_mark_hook
+ (asection *, struct bfd_link_info *, Elf_Internal_Rela *, struct elf_link_hash_entry *, Elf_Internal_Sym *);
+static bfd_boolean m32c_elf_check_relocs
+ (bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *);
+static bfd_boolean m32c_elf_relax_delete_bytes (bfd *, asection *, bfd_vma, int);
+#ifdef DEBUG
+static char * m32c_get_reloc (long reloc);
+#endif
+static bfd_boolean m32c_elf_relax_section
+(bfd *abfd, asection *sec, struct bfd_link_info *link_info, bfd_boolean *again);
+
+
+static reloc_howto_type m32c_elf_howto_table [] =
+{
+ /* This reloc does nothing. */
+ HOWTO (R_M32C_NONE, /* type */
+ 0, /* rightshift */
+ 0, /* 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_M32C_NONE", /* name */
+ FALSE, /* partial_inplace */
+ 0, /* src_mask */
+ 0, /* dst_mask */
+ FALSE), /* pcrel_offset */
+
+ HOWTO (R_M32C_16, /* type */
+ 0, /* rightshift */
+ 1, /* size (0 = byte, 1 = short, 2 = long) */
+ 16, /* bitsize */
+ FALSE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_bitfield, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_M32C_16", /* name */
+ FALSE, /* partial_inplace */
+ 0, /* src_mask */
+ 0x0000ffff, /* dst_mask */
+ FALSE), /* pcrel_offset */
+
+ HOWTO (R_M32C_24, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 24, /* bitsize */
+ FALSE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_bitfield, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_M32C_24", /* name */
+ FALSE, /* partial_inplace */
+ 0, /* src_mask */
+ 0x00ffffff, /* dst_mask */
+ FALSE), /* pcrel_offset */
+
+ HOWTO (R_M32C_32, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 32, /* bitsize */
+ FALSE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_bitfield, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_M32C_32", /* name */
+ FALSE, /* partial_inplace */
+ 0, /* src_mask */
+ 0xffffffff, /* dst_mask */
+ FALSE), /* pcrel_offset */
+
+ HOWTO (R_M32C_8_PCREL, /* type */
+ 0, /* rightshift */
+ 0, /* size (0 = byte, 1 = short, 2 = long) */
+ 8, /* bitsize */
+ TRUE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_signed, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_M32C_8_PCREL", /* name */
+ FALSE, /* partial_inplace */
+ 0, /* src_mask */
+ 0x000000ff, /* dst_mask */
+ TRUE), /* pcrel_offset */
+
+ HOWTO (R_M32C_16_PCREL, /* type */
+ 0, /* rightshift */
+ 1, /* size (0 = byte, 1 = short, 2 = long) */
+ 16, /* bitsize */
+ TRUE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_signed, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_M32C_16_PCREL", /* name */
+ FALSE, /* partial_inplace */
+ 0, /* src_mask */
+ 0, /* dst_mask */
+ TRUE), /* pcrel_offset */
+};
+
+/* Map BFD reloc types to M32C ELF reloc types. */
+
+struct m32c_reloc_map
+{
+ bfd_reloc_code_real_type bfd_reloc_val;
+ unsigned int m32c_reloc_val;
+};
+
+static const struct m32c_reloc_map m32c_reloc_map [] =
+{
+ { BFD_RELOC_NONE, R_M32C_NONE },
+ { BFD_RELOC_16, R_M32C_16 },
+ { BFD_RELOC_24, R_M32C_24 },
+ { BFD_RELOC_32, R_M32C_32 },
+ { BFD_RELOC_8_PCREL, R_M32C_8_PCREL },
+ { BFD_RELOC_16_PCREL, R_M32C_16_PCREL }
+};
+
+static reloc_howto_type *
+m32c_reloc_type_lookup
+ (bfd * abfd ATTRIBUTE_UNUSED,
+ bfd_reloc_code_real_type code)
+{
+ unsigned int i;
+
+ for (i = ARRAY_SIZE (m32c_reloc_map); --i;)
+ if (m32c_reloc_map [i].bfd_reloc_val == code)
+ return & m32c_elf_howto_table [m32c_reloc_map[i].m32c_reloc_val];
+
+ return NULL;
+}
+
+/* Set the howto pointer for an M32C ELF reloc. */
+
+static void
+m32c_info_to_howto_rela
+ (bfd * abfd ATTRIBUTE_UNUSED,
+ arelent * cache_ptr,
+ Elf_Internal_Rela * dst)
+{
+ unsigned int r_type;
+
+ r_type = ELF32_R_TYPE (dst->r_info);
+ BFD_ASSERT (r_type < (unsigned int) R_M32C_max);
+ cache_ptr->howto = & m32c_elf_howto_table [r_type];
+}
+
+
+
+/* Relocate an M32C ELF section.
+ There is some attempt to make this function usable for many architectures,
+ both USE_REL and USE_RELA ['twould be nice if such a critter existed],
+ if only to serve as a learning tool.
+
+ The RELOCATE_SECTION function is called by the new ELF backend linker
+ to handle the relocations for a section.
+
+ The relocs are always passed as Rela structures; if the section
+ actually uses Rel structures, the r_addend field will always be
+ zero.
+
+ This function is responsible for adjusting the section contents as
+ necessary, and (if using Rela relocs and generating a relocatable
+ output file) adjusting the reloc addend as necessary.
+
+ This function does not have to worry about setting the reloc
+ address or the reloc symbol index.
+
+ LOCAL_SYMS is a pointer to the swapped in local symbols.
+
+ LOCAL_SECTIONS is an array giving the section in the input file
+ corresponding to the st_shndx field of each local symbol.
+
+ The global hash table entry for the global symbols can be found
+ via elf_sym_hashes (input_bfd).
+
+ When generating relocatable output, this function must handle
+ STB_LOCAL/STT_SECTION symbols specially. The output symbol is
+ going to be the section symbol corresponding to the output
+ section, which means that the addend must be adjusted
+ accordingly. */
+
+static bfd_boolean
+m32c_elf_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;
+ Elf_Internal_Rela * rel;
+ Elf_Internal_Rela * relend;
+ bfd *dynobj;
+ asection *splt;
+
+ symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
+ sym_hashes = elf_sym_hashes (input_bfd);
+ relend = relocs + input_section->reloc_count;
+
+ dynobj = elf_hash_table (info)->dynobj;
+ splt = NULL;
+ if (dynobj != NULL)
+ splt = bfd_get_section_by_name (dynobj, ".plt");
+
+ for (rel = relocs; rel < relend; rel ++)
+ {
+ reloc_howto_type * howto;
+ unsigned long r_symndx;
+ Elf_Internal_Sym * sym;
+ asection * sec;
+ struct elf_link_hash_entry * h;
+ bfd_vma relocation;
+ bfd_reloc_status_type r;
+ const char * name = NULL;
+ int r_type;
+
+ r_type = ELF32_R_TYPE (rel->r_info);
+
+ r_symndx = ELF32_R_SYM (rel->r_info);
+
+ if (info->relocatable)
+ {
+ /* This is a relocatable link. We don't have to change
+ anything, unless the reloc is against a section symbol,
+ in which case we have to adjust according to where the
+ section symbol winds up in the output section. */
+ if (r_symndx < symtab_hdr->sh_info)
+ {
+ sym = local_syms + r_symndx;
+
+ if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
+ {
+ sec = local_sections [r_symndx];
+ rel->r_addend += sec->output_offset + sym->st_value;
+ }
+ }
+
+ continue;
+ }
+
+ /* This is a final link. */
+ howto = m32c_elf_howto_table + ELF32_R_TYPE (rel->r_info);
+ h = NULL;
+ sym = NULL;
+ sec = NULL;
+
+ if (r_symndx < symtab_hdr->sh_info)
+ {
+ sym = local_syms + r_symndx;
+ sec = local_sections [r_symndx];
+ relocation = (sec->output_section->vma
+ + sec->output_offset
+ + sym->st_value);
+
+ 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;
+ }
+ 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;
+
+ name = h->root.root.string;
+
+ if (h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak)
+ {
+ sec = h->root.u.def.section;
+ relocation = (h->root.u.def.value
+ + sec->output_section->vma
+ + sec->output_offset);
+ }
+ else if (h->root.type == bfd_link_hash_undefweak)
+ {
+ relocation = 0;
+ }
+ else
+ {
+ if (! ((*info->callbacks->undefined_symbol)
+ (info, h->root.root.string, input_bfd,
+ input_section, rel->r_offset, TRUE)))
+ return FALSE;
+ relocation = 0;
+ }
+ }
+
+ switch (ELF32_R_TYPE (rel->r_info))
+ {
+ case R_M32C_16:
+ {
+ bfd_vma *plt_offset;
+
+ if (h != NULL)
+ plt_offset = &h->plt.offset;
+ else
+ plt_offset = elf_local_got_offsets (input_bfd) + r_symndx;
+
+ /* printf("%s: rel %x plt %d\n", h ? h->root.root.string : "(none)",
+ relocation, *plt_offset);*/
+ if (relocation <= 0xffff)
+ {
+ /* If the symbol is in range for a 16-bit address, we should
+ have deallocated the plt entry in relax_section. */
+ BFD_ASSERT (*plt_offset == (bfd_vma) -1);
+ }
+ else
+ {
+ /* If the symbol is out of range for a 16-bit address,
+ we must have allocated a plt entry. */
+ BFD_ASSERT (*plt_offset != (bfd_vma) -1);
+
+ /* If this is the first time we've processed this symbol,
+ fill in the plt entry with the correct symbol address. */
+ if ((*plt_offset & 1) == 0)
+ {
+ unsigned int x;
+
+ x = 0x000000fc; /* jmpf */
+ x |= (relocation << 8) & 0xffffff00;
+ bfd_put_32 (input_bfd, x, splt->contents + *plt_offset);
+ *plt_offset |= 1;
+ }
+
+ relocation = (splt->output_section->vma
+ + splt->output_offset
+ + (*plt_offset & -2));
+ }
+ }
+ break;
+ }
+
+ r = _bfd_final_link_relocate (howto, input_bfd, input_section,
+ contents, rel->r_offset, relocation,
+ rel->r_addend);
+
+ if (r != bfd_reloc_ok)
+ {
+ const char * msg = (const char *) NULL;
+
+ switch (r)
+ {
+ case bfd_reloc_overflow:
+ r = 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);
+ break;
+
+ case bfd_reloc_outofrange:
+ msg = _("internal error: out of range error");
+ break;
+
+ case bfd_reloc_notsupported:
+ msg = _("internal error: unsupported relocation error");
+ break;
+
+ case bfd_reloc_dangerous:
+ msg = _("internal error: dangerous relocation");
+ break;
+
+ default:
+ msg = _("internal error: unknown error");
+ break;
+ }
+
+ if (msg)
+ r = info->callbacks->warning
+ (info, msg, name, input_bfd, input_section, rel->r_offset);
+
+ if (! r)
+ return FALSE;
+ }
+ }
+
+ return TRUE;
+}
+
+/* Return the section that should be marked against GC for a given
+ relocation. */
+
+static asection *
+m32c_elf_gc_mark_hook
+ (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;
+
+ case bfd_link_hash_common:
+ return h->root.u.c.p->section;
+
+ default:
+ break;
+ }
+ }
+ }
+ else
+ {
+ if (!(elf_bad_symtab (sec->owner)
+ && ELF_ST_BIND (sym->st_info) != STB_LOCAL)
+ && ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE)
+ && sym->st_shndx != SHN_COMMON))
+ {
+ return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
+ }
+ }
+
+ return NULL;
+}
+
+/* Update the got entry reference counts for the section being removed. */
+
+static bfd_boolean
+m32c_elf_gc_sweep_hook
+ (bfd * abfd ATTRIBUTE_UNUSED,
+ struct bfd_link_info * info ATTRIBUTE_UNUSED,
+ asection * sec ATTRIBUTE_UNUSED,
+ const Elf_Internal_Rela * relocs ATTRIBUTE_UNUSED)
+{
+ return TRUE;
+}
+
+/* We support 16-bit pointers to code above 64k by generating a thunk
+ below 64k containing a JMP instruction to the final address. */
+
+static bfd_boolean
+m32c_elf_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;
+ struct elf_link_hash_entry ** sym_hashes_end;
+ const Elf_Internal_Rela * rel;
+ const Elf_Internal_Rela * rel_end;
+ bfd_vma *local_plt_offsets;
+ asection *splt;
+ bfd *dynobj;
+
+ if (info->relocatable)
+ return TRUE;
+
+ symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
+ sym_hashes = elf_sym_hashes (abfd);
+ local_plt_offsets = elf_local_got_offsets (abfd);
+ splt = NULL;
+ dynobj = elf_hash_table(info)->dynobj;
+
+ 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;
+
+ rel_end = relocs + sec->reloc_count;
+ for (rel = relocs; rel < rel_end; rel++)
+ {
+ struct elf_link_hash_entry *h;
+ unsigned long r_symndx;
+ bfd_vma *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];
+ 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;
+ }
+
+ switch (ELF32_R_TYPE (rel->r_info))
+ {
+ /* This relocation describes a 16-bit pointer to a function.
+ We may need to allocate a thunk in low memory; reserve memory
+ for it now. */
+ case R_M32C_16:
+ if (dynobj == NULL)
+ elf_hash_table (info)->dynobj = dynobj = abfd;
+ if (splt == NULL)
+ {
+ splt = bfd_get_section_by_name (dynobj, ".plt");
+ if (splt == NULL)
+ {
+ splt = bfd_make_section (dynobj, ".plt");
+ if (splt == NULL
+ || ! bfd_set_section_flags (dynobj, splt,
+ (SEC_ALLOC
+ | SEC_LOAD
+ | SEC_HAS_CONTENTS
+ | SEC_IN_MEMORY
+ | SEC_LINKER_CREATED
+ | SEC_READONLY
+ | SEC_CODE))
+ || ! bfd_set_section_alignment (dynobj, splt, 1))
+ return FALSE;
+ }
+ }
+
+ if (h != NULL)
+ offset = &h->plt.offset;
+ else
+ {
+ if (local_plt_offsets == NULL)
+ {
+ size_t size;
+ unsigned int i;
+
+ size = symtab_hdr->sh_info * sizeof (bfd_vma);
+ local_plt_offsets = (bfd_vma *) bfd_alloc (abfd, size);
+ if (local_plt_offsets == NULL)
+ return FALSE;
+ elf_local_got_offsets (abfd) = local_plt_offsets;
+
+ for (i = 0; i < symtab_hdr->sh_info; i++)
+ local_plt_offsets[i] = (bfd_vma) -1;
+ }
+ offset = &local_plt_offsets[r_symndx];
+ }
+
+ if (*offset == (bfd_vma) -1)
+ {
+ *offset = splt->size;
+ splt->size += 4;
+ }
+ break;
+ }
+ }
+
+ return TRUE;
+}
+
+/* This must exist if dynobj is ever set. */
+
+static bfd_boolean
+m32c_elf_finish_dynamic_sections (bfd *abfd ATTRIBUTE_UNUSED,
+ struct bfd_link_info *info)
+{
+ bfd *dynobj;
+ asection *splt;
+
+ /* As an extra sanity check, verify that all plt entries have
+ been filled in. */
+
+ if ((dynobj = elf_hash_table (info)->dynobj) != NULL
+ && (splt = bfd_get_section_by_name (dynobj, ".plt")) != NULL)
+ {
+ bfd_byte *contents = splt->contents;
+ unsigned int i, size = splt->size;
+ for (i = 0; i < size; i += 4)
+ {
+ unsigned int x = bfd_get_32 (dynobj, contents + i);
+ BFD_ASSERT (x != 0);
+ }
+ }
+
+ return TRUE;
+}
+
+static bfd_boolean
+m32c_elf_always_size_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
+ struct bfd_link_info *info)
+{
+ bfd *dynobj;
+ asection *splt;
+
+ if (info->relocatable)
+ return TRUE;
+
+ dynobj = elf_hash_table (info)->dynobj;
+ if (dynobj == NULL)
+ return TRUE;
+
+ splt = bfd_get_section_by_name (dynobj, ".plt");
+ BFD_ASSERT (splt != NULL);
+
+ splt->contents = (bfd_byte *) bfd_zalloc (dynobj, splt->size);
+ if (splt->contents == NULL)
+ return FALSE;
+
+ return TRUE;
+}
+
+/* Function to set the ELF flag bits. */
+
+static bfd_boolean
+m32c_elf_set_private_flags (bfd *abfd, flagword flags)
+{
+ elf_elfheader (abfd)->e_flags = flags;
+ elf_flags_init (abfd) = TRUE;
+ return TRUE;
+}
+
+/* Merge backend specific data from an object file to the output
+ object file when linking. */
+
+static bfd_boolean
+m32c_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
+{
+ flagword old_flags, old_partial;
+ flagword new_flags, new_partial;
+ bfd_boolean error = FALSE;
+ char new_opt[80];
+ char old_opt[80];
+
+ new_opt[0] = old_opt[0] = '\0';
+ new_flags = elf_elfheader (ibfd)->e_flags;
+ old_flags = elf_elfheader (obfd)->e_flags;
+
+#ifdef DEBUG
+ (*_bfd_error_handler) ("old_flags = 0x%.8lx, new_flags = 0x%.8lx, init = %s, filename = %s",
+ old_flags, new_flags, elf_flags_init (obfd) ? "yes" : "no",
+ bfd_get_filename (ibfd));
+#endif
+
+ if (!elf_flags_init (obfd))
+ {
+ /* First call, no flags set. */
+ elf_flags_init (obfd) = TRUE;
+ elf_elfheader (obfd)->e_flags = new_flags;
+ }
+
+ else if (new_flags == old_flags)
+ /* Compatible flags are ok. */
+ ;
+
+ else /* Possibly incompatible flags. */
+ {
+ /* Warn if different cpu is used (allow a specific cpu to override
+ the generic cpu). */
+ new_partial = (new_flags & EF_M32C_CPU_MASK);
+ old_partial = (old_flags & EF_M32C_CPU_MASK);
+ if (new_partial == old_partial)
+ ;
+
+ else
+ {
+ switch (new_partial)
+ {
+ default: strcat (new_opt, " -m16c"); break;
+ case EF_M32C_CPU_M16C: strcat (new_opt, " -m16c"); break;
+ case EF_M32C_CPU_M32C: strcat (new_opt, " -m32c"); break;
+ }
+
+ switch (old_partial)
+ {
+ default: strcat (old_opt, " -m16c"); break;
+ case EF_M32C_CPU_M16C: strcat (old_opt, " -m16c"); break;
+ case EF_M32C_CPU_M32C: strcat (old_opt, " -m32c"); break;
+ }
+ }
+
+ /* Print out any mismatches from above. */
+ if (new_opt[0])
+ {
+ error = TRUE;
+ (*_bfd_error_handler)
+ (_("%s: compiled with %s and linked with modules compiled with %s"),
+ bfd_get_filename (ibfd), new_opt, old_opt);
+ }
+
+ new_flags &= ~ EF_M32C_ALL_FLAGS;
+ old_flags &= ~ EF_M32C_ALL_FLAGS;
+
+ /* Warn about any other mismatches. */
+ if (new_flags != old_flags)
+ {
+ error = TRUE;
+ (*_bfd_error_handler)
+ (_("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"),
+ bfd_get_filename (ibfd), (long)new_flags, (long)old_flags);
+ }
+ }
+
+ if (error)
+ bfd_set_error (bfd_error_bad_value);
+
+ return !error;
+}
+
+
+static bfd_boolean
+m32c_elf_print_private_bfd_data (bfd *abfd, PTR ptr)
+{
+ FILE *file = (FILE *) ptr;
+ flagword flags;
+
+ BFD_ASSERT (abfd != NULL && ptr != NULL);
+
+ /* Print normal ELF private data. */
+ _bfd_elf_print_private_bfd_data (abfd, ptr);
+
+ flags = elf_elfheader (abfd)->e_flags;
+ fprintf (file, _("private flags = 0x%lx:"), (long)flags);
+
+ switch (flags & EF_M32C_CPU_MASK)
+ {
+ default: break;
+ case EF_M32C_CPU_M16C: fprintf (file, " -m16c"); break;
+ case EF_M32C_CPU_M32C: fprintf (file, " -m32c"); break;
+ }
+
+ fputc ('\n', file);
+ return TRUE;
+}
+
+/* Return the MACH for an e_flags value. */
+
+static int
+elf32_m32c_machine (bfd *abfd)
+{
+ switch (elf_elfheader (abfd)->e_flags & EF_M32C_CPU_MASK)
+ {
+ case EF_M32C_CPU_M16C: return bfd_mach_m16c;
+ case EF_M32C_CPU_M32C: return bfd_mach_m32c;
+ }
+
+ return bfd_mach_m16c;
+}
+
+static bfd_boolean
+m32c_elf_object_p (bfd *abfd)
+{
+ bfd_default_set_arch_mach (abfd, bfd_arch_m32c,
+ elf32_m32c_machine (abfd));
+ return TRUE;
+}
+
+
+#ifdef DEBUG
+static void
+dump_symtab (bfd * abfd, void *internal_syms, void *external_syms)
+{
+ size_t locsymcount;
+ Elf_Internal_Sym *isymbuf;
+ Elf_Internal_Sym *isymend;
+ Elf_Internal_Sym *isym;
+ Elf_Internal_Shdr *symtab_hdr;
+ bfd_boolean free_internal = 0, free_external = 0;
+ char * st_info_str;
+ char * st_info_stb_str;
+ char * st_other_str;
+ char * st_shndx_str;
+
+ if (! internal_syms)
+ {
+ internal_syms = bfd_malloc (1000);
+ free_internal = 1;
+ }
+ if (! external_syms)
+ {
+ external_syms = bfd_malloc (1000);
+ free_external = 1;
+ }
+
+ symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
+ locsymcount = symtab_hdr->sh_size / get_elf_backend_data(abfd)->s->sizeof_sym;
+ if (free_internal)
+ isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
+ symtab_hdr->sh_info, 0,
+ internal_syms, external_syms, NULL);
+ else
+ isymbuf = internal_syms;
+ isymend = isymbuf + locsymcount;
+
+ for (isym = isymbuf ; isym < isymend ; isym++)
+ {
+ switch (ELF_ST_TYPE (isym->st_info))
+ {
+ case STT_FUNC: st_info_str = "STT_FUNC";
+ case STT_SECTION: st_info_str = "STT_SECTION";
+ case STT_SRELC: st_info_str = "STT_SRELC";
+ case STT_FILE: st_info_str = "STT_FILE";
+ case STT_OBJECT: st_info_str = "STT_OBJECT";
+ case STT_TLS: st_info_str = "STT_TLS";
+ default: st_info_str = "";
+ }
+ switch (ELF_ST_BIND (isym->st_info))
+ {
+ case STB_LOCAL: st_info_stb_str = "STB_LOCAL";
+ case STB_GLOBAL: st_info_stb_str = "STB_GLOBAL";
+ default: st_info_stb_str = "";
+ }
+ switch (ELF_ST_VISIBILITY (isym->st_other))
+ {
+ case STV_DEFAULT: st_other_str = "STV_DEFAULT";
+ case STV_INTERNAL: st_other_str = "STV_INTERNAL";
+ case STV_PROTECTED: st_other_str = "STV_PROTECTED";
+ default: st_other_str = "";
+ }
+ switch (isym->st_shndx)
+ {
+ case SHN_ABS: st_shndx_str = "SHN_ABS";
+ case SHN_COMMON: st_shndx_str = "SHN_COMMON";
+ case SHN_UNDEF: st_shndx_str = "SHN_UNDEF";
+ default: st_shndx_str = "";
+ }
+
+ printf ("isym = %p st_value = %lx st_size = %lx st_name = (%lu) %s "
+ "st_info = (%d) %s %s st_other = (%d) %s st_shndx = (%d) %s\n",
+ isym,
+ (unsigned long) isym->st_value,
+ (unsigned long) isym->st_size,
+ isym->st_name,
+ bfd_elf_string_from_elf_section (abfd, symtab_hdr->sh_link,
+ isym->st_name),
+ isym->st_info, st_info_str, st_info_stb_str,
+ isym->st_other, st_other_str,
+ isym->st_shndx, st_shndx_str);
+ }
+ if (free_internal)
+ free (internal_syms);
+ if (free_external)
+ free (external_syms);
+}
+
+static char *
+m32c_get_reloc (long reloc)
+{
+ if (0 <= reloc && reloc < R_M32C_max)
+ return m32c_elf_howto_table[reloc].name;
+ else
+ return "";
+}
+#endif /* DEBUG */
+
+/* Handle relaxing. */
+
+/* A subroutine of m32c_elf_relax_section. If the global symbol H
+ is within the low 64k, remove any entry for it in the plt. */
+
+struct relax_plt_data
+{
+ asection *splt;
+ bfd_boolean *again;
+};
+
+static bfd_boolean
+m32c_relax_plt_check (struct elf_link_hash_entry *h,
+ PTR xdata)
+{
+ struct relax_plt_data *data = (struct relax_plt_data *) xdata;
+
+ if (h->root.type == bfd_link_hash_warning)
+ h = (struct elf_link_hash_entry *) h->root.u.i.link;
+
+ if (h->plt.offset != (bfd_vma) -1)
+ {
+ bfd_vma address;
+
+ if (h->root.type == bfd_link_hash_undefined
+ || h->root.type == bfd_link_hash_undefweak)
+ address = 0;
+ else
+ address = (h->root.u.def.section->output_section->vma
+ + h->root.u.def.section->output_offset
+ + h->root.u.def.value);
+
+ if (address <= 0xffff)
+ {
+ h->plt.offset = -1;
+ data->splt->size -= 4;
+ *data->again = TRUE;
+ }
+ }
+
+ return TRUE;
+}
+
+/* A subroutine of m32c_elf_relax_section. If the global symbol H
+ previously had a plt entry, give it a new entry offset. */
+
+static bfd_boolean
+m32c_relax_plt_realloc (struct elf_link_hash_entry *h,
+ PTR xdata)
+{
+ bfd_vma *entry = (bfd_vma *) xdata;
+
+ if (h->root.type == bfd_link_hash_warning)
+ h = (struct elf_link_hash_entry *) h->root.u.i.link;
+
+ if (h->plt.offset != (bfd_vma) -1)
+ {
+ h->plt.offset = *entry;
+ *entry += 4;
+ }
+
+ return TRUE;
+}
+
+static bfd_boolean
+m32c_elf_relax_plt_section (bfd *dynobj,
+ asection *splt,
+ struct bfd_link_info *info,
+ bfd_boolean *again)
+{
+ struct relax_plt_data relax_plt_data;
+ bfd *ibfd;
+
+ /* Assume nothing changes. */
+ *again = FALSE;
+
+ if (info->relocatable)
+ return TRUE;
+
+ /* We only relax the .plt section at the moment. */
+ if (dynobj != elf_hash_table (info)->dynobj
+ || strcmp (splt->name, ".plt") != 0)
+ return TRUE;
+
+ /* Quick check for an empty plt. */
+ if (splt->size == 0)
+ return TRUE;
+
+ /* Map across all global symbols; see which ones happen to
+ fall in the low 64k. */
+ relax_plt_data.splt = splt;
+ relax_plt_data.again = again;
+ elf_link_hash_traverse (elf_hash_table (info), m32c_relax_plt_check,
+ &relax_plt_data);
+
+ /* Likewise for local symbols, though that's somewhat less convenient
+ as we have to walk the list of input bfds and swap in symbol data. */
+ for (ibfd = info->input_bfds; ibfd ; ibfd = ibfd->link_next)
+ {
+ bfd_vma *local_plt_offsets = elf_local_got_offsets (ibfd);
+ Elf_Internal_Shdr *symtab_hdr;
+ Elf_Internal_Sym *isymbuf = NULL;
+ unsigned int idx;
+
+ if (! local_plt_offsets)
+ continue;
+
+ symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
+ if (symtab_hdr->sh_info != 0)
+ {
+ isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
+ if (isymbuf == NULL)
+ isymbuf = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
+ symtab_hdr->sh_info, 0,
+ NULL, NULL, NULL);
+ if (isymbuf == NULL)
+ return FALSE;
+ }
+
+ for (idx = 0; idx < symtab_hdr->sh_info; ++idx)
+ {
+ Elf_Internal_Sym *isym;
+ asection *tsec;
+ bfd_vma address;
+
+ if (local_plt_offsets[idx] == (bfd_vma) -1)
+ continue;
+
+ isym = &isymbuf[idx];
+ if (isym->st_shndx == SHN_UNDEF)
+ continue;
+ else if (isym->st_shndx == SHN_ABS)
+ tsec = bfd_abs_section_ptr;
+ else if (isym->st_shndx == SHN_COMMON)
+ tsec = bfd_com_section_ptr;
+ else
+ tsec = bfd_section_from_elf_index (ibfd, isym->st_shndx);
+
+ address = (tsec->output_section->vma
+ + tsec->output_offset
+ + isym->st_value);
+ if (address <= 0xffff)
+ {
+ local_plt_offsets[idx] = -1;
+ splt->size -= 4;
+ *again = TRUE;
+ }
+ }
+
+ if (isymbuf != NULL
+ && symtab_hdr->contents != (unsigned char *) isymbuf)
+ {
+ if (! info->keep_memory)
+ free (isymbuf);
+ else
+ {
+ /* Cache the symbols for elf_link_input_bfd. */
+ symtab_hdr->contents = (unsigned char *) isymbuf;
+ }
+ }
+ }
+
+ /* If we changed anything, walk the symbols again to reallocate
+ .plt entry addresses. */
+ if (*again && splt->size > 0)
+ {
+ bfd_vma entry = 0;
+
+ elf_link_hash_traverse (elf_hash_table (info),
+ m32c_relax_plt_realloc, &entry);
+
+ for (ibfd = info->input_bfds; ibfd ; ibfd = ibfd->link_next)
+ {
+ bfd_vma *local_plt_offsets = elf_local_got_offsets (ibfd);
+ unsigned int nlocals = elf_tdata (ibfd)->symtab_hdr.sh_info;
+ unsigned int idx;
+
+ if (! local_plt_offsets)
+ continue;
+
+ for (idx = 0; idx < nlocals; ++idx)
+ if (local_plt_offsets[idx] != (bfd_vma) -1)
+ {
+ local_plt_offsets[idx] = entry;
+ entry += 4;
+ }
+ }
+ }
+
+ return TRUE;
+}
+
+struct relax_reloc_s
+{
+ int machine;
+ int opcode_mask;
+ bfd_vma opcode; /* original opcode or insn part */
+ int relax_backward; /* lbound */
+ int relax_forward; /* hbound */
+ int value_shift;
+ int mask;
+ int new_opcode; /* new opcode */
+ int old_reloc; /* old relocation */
+ int new_reloc; /* new relocation */
+ int use_pcrel;
+ int delete_n; /* # bytes differ between original and new */
+};
+static struct relax_reloc_s relax_reloc [] =
+ {
+#if 0
+ {
+ bfd_mach_m16c,
+ 0xff,
+ 0xfc, /* jmp.a */
+ -32768,
+ 32767,
+ 2,
+ 0xffffff00,
+ 0xf4, /* jmp.w */
+ R_M32C_8_ELABEL24,
+ R_M32C_8_PCREL16,
+ 1,
+ 1,
+ },
+ {
+ bfd_mach_m32c,
+ 0xff,
+ 0xcc, /* jmp.a */
+ -32768,
+ 32767,
+ 2,
+ 0xffffff00,
+ 0xce, /* jmp.w */
+ R_M32C_8_ELABEL24,
+ R_M32C_8_PCREL16,
+ 1,
+ 1,
+ },
+ {
+ bfd_mach_m32c,
+ 0xff,
+ 0xcd, /* jsr.a */
+ -32768,
+ 32767,
+ 2,
+ 0xffffff00,
+ 0xcf, /* jsr.w */
+ R_M32C_8_ELABEL24,
+ R_M32C_8_PCREL16,
+ 1,
+ 1,
+ },
+ {
+ bfd_mach_m16c,
+ 0xff,
+ 0xf4, /* jmp.w */
+ -128,
+ 127,
+ 2,
+ 0xffffff00,
+ 0xfe, /* jmp.b */
+ R_M32C_8_PCREL16,
+ R_M32C_8_PCREL8,
+ 1,
+ 1,
+ },
+ {
+ bfd_mach_m32c,
+ 0xff,
+ 0xce, /* jmp.w */
+ -128,
+ 127,
+ 2,
+ 0xffffff00,
+ 0xbb, /* jmp.b */
+ R_M32C_8_PCREL16,
+ R_M32C_8_PCREL8,
+ 1,
+ 1,
+ },
+ {
+ bfd_mach_m32c,
+ 0xc0f6,
+ 0x8096, /* dest */
+ 0,
+ 0xffff,
+ 3,
+ 0xffff3fff,
+ 0xc000, /* abs16 */
+ R_M32C_24_ABS24,
+ R_M32C_24_ABS16,
+ 0,
+ 1,
+ },
+ {
+ bfd_mach_m32c,
+ 0xc0f6,
+ 0x80a6, /* dest */
+ 0,
+ 0xffff,
+ 4,
+ 0xffff3fff,
+ 0xc000, /* abs16 */
+ R_M32C_32_ABS24,
+ R_M32C_32_ABS16,
+ 0,
+ 1,
+ },
+ {
+ bfd_mach_m32c,
+ 0xc0f6,
+ 0x80b6, /* dest */
+ 0,
+ 0xffff,
+ 5,
+ 0xffff3fff,
+ 0xc000, /* abs16 */
+ R_M32C_40_ABS24,
+ R_M32C_40_ABS16,
+ 0,
+ 1,
+ },
+ {
+ bfd_mach_m32c,
+ 0x30f0,
+ 0x20b0, /* src */
+ 0,
+ 0xffff,
+ 2,
+ 0xffffcfff,
+ 0x3000, /* abs16 */
+ R_M32C_16_ABS24,
+ R_M32C_16_ABS16,
+ 0,
+ 1,
+ },
+ {
+ bfd_mach_m32c,
+ 0xc086,
+ 0x8086, /* dest */
+ 0,
+ 0xffff,
+ 2,
+ 0xffff3fff,
+ 0xc000, /* abs16 */
+ R_M32C_16_ABS24,
+ R_M32C_16_ABS16,
+ 0,
+ 1,
+ },
+#endif
+ {
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ }
+ };
+static bfd_boolean
+m32c_elf_relax_section
+ (bfd * abfd,
+ asection * sec,
+ struct bfd_link_info * link_info,
+ bfd_boolean * again)
+{
+ Elf_Internal_Shdr *symtab_hdr;
+ Elf_Internal_Shdr *shndx_hdr;
+ Elf_Internal_Rela *internal_relocs;
+ Elf_Internal_Rela *free_relocs = NULL;
+ Elf_Internal_Rela *irel, *irelend;
+ bfd_byte * contents = NULL;
+ bfd_byte * free_contents = NULL;
+ Elf32_External_Sym *extsyms = NULL;
+ Elf32_External_Sym *free_extsyms = NULL;
+ Elf_External_Sym_Shndx *shndx_buf = NULL;
+ int machine;
+
+ if (abfd == elf_hash_table (link_info)->dynobj
+ && strcmp (sec->name, ".plt") == 0)
+ return m32c_elf_relax_plt_section (abfd, sec, link_info, again);
+
+ /* Assume nothing changes. */
+ *again = FALSE;
+
+ machine = elf32_m32c_machine (abfd);
+
+ /* 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 (link_info->relocatable
+ || (sec->flags & SEC_RELOC) == 0
+ || sec->reloc_count == 0
+ || (sec->flags & SEC_CODE) == 0)
+ return TRUE;
+
+ /* Relaxing doesn't quite work right yet. */
+ return TRUE;
+
+ symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
+ shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
+
+ /* Get a copy of the native relocations. */
+ internal_relocs = (_bfd_elf_link_read_relocs
+ (abfd, sec, (PTR) NULL, (Elf_Internal_Rela *) NULL,
+ link_info->keep_memory));
+ if (internal_relocs == NULL)
+ goto error_return;
+ if (! link_info->keep_memory)
+ free_relocs = internal_relocs;
+
+ /* Walk through them looking for relaxing opportunities. */
+ irelend = internal_relocs + sec->reloc_count;
+
+ for (irel = internal_relocs; irel < irelend; irel++)
+ {
+ bfd_vma symval;
+ bfd_vma insn;
+ bfd_vma pc;
+ bfd_signed_vma pcrel_value;
+ bfd_vma addend;
+ int to_delete;
+ int i;
+
+ /* Get the section contents. */
+ if (contents == NULL)
+ {
+ if (elf_section_data (sec)->this_hdr.contents != NULL)
+ contents = elf_section_data (sec)->this_hdr.contents;
+ /* Go get them off disk. */
+ else if (!bfd_malloc_and_get_section (abfd, sec, &contents))
+ goto error_return;
+ }
+
+ /* Read this BFD's symbols if we haven't done so already. */
+ if (extsyms == NULL)
+ {
+ /* Get cached copy if it exists. */
+ if (symtab_hdr->contents != NULL)
+ extsyms = (Elf32_External_Sym *) symtab_hdr->contents;
+ else
+ {
+ bfd_size_type amt = symtab_hdr->sh_size;
+
+ /* Go get them off disk. */
+ extsyms = (Elf32_External_Sym *) bfd_malloc (amt);
+ if (extsyms == NULL)
+ goto error_return;
+ free_extsyms = extsyms;
+ if (bfd_seek (abfd, symtab_hdr->sh_offset, SEEK_SET) != 0
+ || bfd_bread (extsyms, amt, abfd) != amt)
+ goto error_return;
+ symtab_hdr->contents = (bfd_byte *) extsyms;
+ }
+
+ if (shndx_hdr->sh_size != 0)
+ {
+ bfd_size_type amt;
+
+ amt = symtab_hdr->sh_info;
+ amt *= sizeof (Elf_External_Sym_Shndx);
+ shndx_buf = (Elf_External_Sym_Shndx *) bfd_malloc (amt);
+ if (shndx_buf == NULL)
+ goto error_return;
+ if (bfd_seek (abfd, shndx_hdr->sh_offset, SEEK_SET) != 0
+ || bfd_bread ((PTR) shndx_buf, amt, abfd) != amt)
+ goto error_return;
+ shndx_hdr->contents = (bfd_byte *) shndx_buf;
+ }
+ }
+
+ /* 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. */
+ Elf32_External_Sym *esym;
+ Elf_External_Sym_Shndx *shndx;
+ Elf_Internal_Sym isym;
+
+ esym = extsyms + ELF32_R_SYM (irel->r_info);
+ shndx = shndx_buf + (shndx_buf ? ELF32_R_SYM (irel->r_info) : 0);
+ bfd_elf32_swap_symbol_in (abfd, esym, shndx, &isym);
+
+ symval = (isym.st_value
+ + sec->output_section->vma
+ + sec->output_offset);
+ }
+ 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);
+ }
+
+ /* There will always be room for the relaxed insn, since it is smaller
+ than the one it would replace. */
+ BFD_ASSERT (irel->r_offset <= sec->size - 2);
+
+ insn = bfd_get_16 (abfd, contents + irel->r_offset + 0);
+
+ addend = irel->r_addend;
+ for (i = 0; relax_reloc[i].machine; i++)
+ {
+#ifdef DEBUG
+ _bfd_error_handler ("insn %x %d mask %x opcode %x =%x\n",
+ insn, i, relax_reloc[i].opcode_mask,
+ relax_reloc[i].opcode,
+ (insn & relax_reloc[i].opcode_mask) == relax_reloc[i].opcode);
+#endif
+ if (!(machine == relax_reloc[i].machine
+ && (insn & relax_reloc[i].opcode_mask) == relax_reloc[i].opcode
+ && (relax_reloc[i].old_reloc
+ == (int) ELF32_R_TYPE(irel->r_info))))
+ continue;
+
+ /* At this point we've confirmed we have a matching insn. Now
+ ensure the operand is in range. */
+ if (relax_reloc[i].use_pcrel)
+ {
+ pc = sec->output_section->vma + sec->output_offset
+ + irel->r_offset;
+ pcrel_value = symval - pc;
+#ifndef USE_REL /* put in for learning purposes */
+ pcrel_value += addend;
+#else
+ addend = bfd_get_signed_16 (abfd, contents + irel->r_offset + 2);
+ pcrel_value += addend;
+#endif
+ }
+ else
+ pcrel_value = symval;
+
+ if (pcrel_value >= relax_reloc[i].relax_backward
+ && pcrel_value < relax_reloc[i].relax_forward + 2)
+ {
+ /* We can relax to a shorter operand. */
+ insn = (insn & relax_reloc[i].mask) | relax_reloc[i].new_opcode;
+
+ to_delete = relax_reloc[i].delete_n;
+
+ /* Rewrite the insn. */
+ bfd_put_16 (abfd, insn, contents + irel->r_offset);
+
+ /* Set the new reloc type. */
+ irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
+ relax_reloc[i].new_reloc);
+ irel->r_addend = pcrel_value;
+ }
+ else
+ continue;
+
+#ifdef DEBUG
+ _bfd_error_handler ("insn %x pc %x index %d mask %x shift %d delete %d\n"
+ "old reloc %s new reloc %s",
+ insn, sec->output_section->vma
+ + sec->output_offset + irel->r_offset + 2,
+ i, relax_reloc[i].opcode_mask,
+ relax_reloc[i].value_shift, to_delete,
+ m32c_get_reloc (relax_reloc[i].old_reloc),
+ m32c_get_reloc (relax_reloc[i].new_reloc));
+#endif
+
+ /* Note that we've changed the relocs, section contents, etc. */
+ elf_section_data (sec)->relocs = internal_relocs;
+ free_relocs = NULL;
+
+ elf_section_data (sec)->this_hdr.contents = contents;
+ free_contents = NULL;
+
+ symtab_hdr->contents = (bfd_byte *) extsyms;
+ free_extsyms = NULL;
+
+ /* Delete TO_DELETE bytes of data. */
+ if (! m32c_elf_relax_delete_bytes
+ (abfd, sec, irel->r_offset + relax_reloc[i].value_shift,
+ to_delete))
+ goto error_return;
+ } /* next relax_reloc */
+ } /* next relocation */
+
+ if (free_relocs != NULL)
+ {
+ free (free_relocs);
+ free_relocs = NULL;
+ }
+
+ if (free_contents != NULL)
+ {
+ if (! link_info->keep_memory)
+ free (free_contents);
+ /* Cache the section contents for elf_link_input_bfd. */
+ else
+ elf_section_data (sec)->this_hdr.contents = contents;
+
+ free_contents = NULL;
+ }
+
+ if (shndx_buf != NULL)
+ {
+ shndx_hdr->contents = NULL;
+ free (shndx_buf);
+ }
+
+ if (free_extsyms != NULL)
+ {
+ if (! link_info->keep_memory)
+ free (free_extsyms);
+ /* Cache the symbols for elf_link_input_bfd. */
+ else
+ symtab_hdr->contents = NULL /* (unsigned char *) extsyms*/;
+
+ free_extsyms = NULL;
+ }
+ /* elf_link_input_bfd expects internal syms. */
+ symtab_hdr->contents = NULL;
+
+ return TRUE;
+
+ error_return:
+ if (free_relocs != NULL)
+ free (free_relocs);
+ if (free_contents != NULL)
+ free (free_contents);
+ if (shndx_buf != NULL)
+ {
+ shndx_hdr->contents = NULL;
+ free (shndx_buf);
+ }
+ if (free_extsyms != NULL)
+ free (free_extsyms);
+ return FALSE;
+}
+
+/* Delete some bytes from a section while relaxing. */
+
+static bfd_boolean
+m32c_elf_relax_delete_bytes
+ (bfd * abfd,
+ asection * sec,
+ bfd_vma addr,
+ int count)
+{
+ Elf_Internal_Shdr *symtab_hdr;
+ Elf_Internal_Shdr *shndx_hdr;
+ int sec_shndx;
+ bfd_byte *contents;
+ Elf_Internal_Rela *irel;
+ Elf_Internal_Rela *irelend;
+ Elf_Internal_Rela *irelalign;
+ bfd_vma toaddr;
+ Elf32_External_Sym *esym;
+ Elf32_External_Sym *esymend;
+ Elf32_External_Sym *extsyms;
+ Elf_External_Sym_Shndx *shndx_buf;
+ Elf_External_Sym_Shndx *shndx;
+ struct elf_link_hash_entry ** sym_hashes;
+ struct elf_link_hash_entry ** end_hashes;
+ unsigned int symcount;
+
+ symtab_hdr = & elf_tdata (abfd)->symtab_hdr;
+ extsyms = (Elf32_External_Sym *) symtab_hdr->contents;
+ shndx_hdr = & elf_tdata (abfd)->symtab_shndx_hdr;
+ shndx_buf = (Elf_External_Sym_Shndx *) shndx_hdr->contents;
+ sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
+ contents = elf_section_data (sec)->this_hdr.contents;
+
+ /* The deletion must stop at the next ALIGN reloc for an aligment
+ power larger than the number of bytes we are deleting. */
+ irelalign = NULL;
+ toaddr = sec->size;
+
+ 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. */
+ for (irel = elf_section_data (sec)->relocs; irel < irelend; irel ++)
+ {
+ /* Get the new reloc address. */
+ if (irel->r_offset > addr && irel->r_offset < toaddr)
+ irel->r_offset -= count;
+ if (irel->r_addend > addr && irel->r_addend < toaddr)
+ irel->r_addend -= count;
+ }
+
+ /* Adjust the local symbols defined in this section. */
+ shndx = shndx_buf;
+ esym = extsyms;
+ esymend = esym + symtab_hdr->sh_info;
+ for (; esym < esymend; esym++, shndx = (shndx ? shndx + 1 : NULL))
+ {
+ Elf_Internal_Sym isym;
+ Elf_External_Sym_Shndx dummy;
+
+ bfd_elf32_swap_symbol_in (abfd, esym, shndx, &isym);
+
+ if ((int) isym.st_shndx == sec_shndx
+ && isym.st_value > addr
+ && isym.st_value < toaddr)
+ {
+ isym.st_value -= count;
+ bfd_elf32_swap_symbol_out (abfd, &isym, (PTR) esym, (PTR) & dummy);
+ }
+ }
+
+ /* 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);
+ // sym_hashes += symtab_hdr->sh_info;
+ end_hashes = sym_hashes + symcount;
+
+ for (; sym_hashes < end_hashes; sym_hashes ++)
+ {
+ struct elf_link_hash_entry * sym_hash = * sym_hashes;
+
+ if (sym_hash &&
+ ( 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)
+ sym_hash->root.u.def.value -= count;
+ }
+
+ return TRUE;
+}
+
+
+#define ELF_ARCH bfd_arch_m32c
+#define ELF_MACHINE_CODE EM_M32C
+#define ELF_MAXPAGESIZE 0x1000
+
+#if 0
+#define TARGET_BIG_SYM bfd_elf32_m32c_vec
+#define TARGET_BIG_NAME "elf32-m32c"
+#else
+#define TARGET_LITTLE_SYM bfd_elf32_m32c_vec
+#define TARGET_LITTLE_NAME "elf32-m32c"
+#endif
+
+#define elf_info_to_howto_rel NULL
+#define elf_info_to_howto m32c_info_to_howto_rela
+#define elf_backend_object_p m32c_elf_object_p
+#define elf_backend_relocate_section m32c_elf_relocate_section
+#define elf_backend_gc_mark_hook m32c_elf_gc_mark_hook
+#define elf_backend_gc_sweep_hook m32c_elf_gc_sweep_hook
+#define elf_backend_check_relocs m32c_elf_check_relocs
+#define elf_backend_object_p m32c_elf_object_p
+#define elf_symbol_leading_char ('_')
+#define elf_backend_always_size_sections \
+ m32c_elf_always_size_sections
+#define elf_backend_finish_dynamic_sections \
+ m32c_elf_finish_dynamic_sections
+
+#define elf_backend_can_gc_sections 1
+
+#define bfd_elf32_bfd_reloc_type_lookup m32c_reloc_type_lookup
+#define bfd_elf32_bfd_relax_section m32c_elf_relax_section
+#define bfd_elf32_bfd_set_private_flags m32c_elf_set_private_flags
+#define bfd_elf32_bfd_merge_private_bfd_data m32c_elf_merge_private_bfd_data
+#define bfd_elf32_bfd_print_private_bfd_data m32c_elf_print_private_bfd_data
+
+#include "elf32-target.h"