diff options
Diffstat (limited to 'bfd/elf32-fr30.c')
| -rw-r--r-- | bfd/elf32-fr30.c | 811 |
1 files changed, 811 insertions, 0 deletions
diff --git a/bfd/elf32-fr30.c b/bfd/elf32-fr30.c new file mode 100644 index 0000000..7c8725f --- /dev/null +++ b/bfd/elf32-fr30.c @@ -0,0 +1,811 @@ +/* FR30-specific support for 32-bit ELF. + Copyright (C) 1998 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/fr30.h" + +/* Forward declarations. */ +static bfd_reloc_status_type fr30_elf_i20_reloc + PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); +static bfd_reloc_status_type fr30_elf_i32_reloc + PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); +static reloc_howto_type * fr30_reloc_type_lookup + PARAMS ((bfd *abfd, bfd_reloc_code_real_type code)); +static void fr30_info_to_howto_rela + PARAMS ((bfd *, arelent *, Elf32_Internal_Rela *)); +static boolean fr30_elf_relocate_section + PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); +static bfd_reloc_status_type fr30_final_link_relocate + PARAMS ((reloc_howto_type *, bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, bfd_vma)); +static boolean fr30_elf_gc_sweep_hook + PARAMS ((bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *)); +static asection * fr30_elf_gc_mark_hook + PARAMS ((bfd *, struct bfd_link_info *, Elf_Internal_Rela *, struct elf_link_hash_entry *, Elf_Internal_Sym *)); + +static reloc_howto_type fr30_elf_howto_table [] = +{ + /* This reloc does nothing. */ + HOWTO (R_FR30_NONE, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_FR30_NONE", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + false), /* pcrel_offset */ + + /* An 8 bit absolute relocation. */ + HOWTO (R_FR30_8, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 8, /* bitsize */ + false, /* pc_relative */ + 4, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_FR30_8", /* name */ + true, /* partial_inplace */ + 0x0000, /* src_mask */ + 0x0ff0, /* dst_mask */ + false), /* pcrel_offset */ + + /* A 20 bit absolute relocation. */ + HOWTO (R_FR30_20, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 20, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + fr30_elf_i20_reloc, /* special_function */ + "R_FR30_20", /* name */ + true, /* partial_inplace */ + 0x00000000, /* src_mask */ + 0x00f0ffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* A 32 bit absolute relocation. */ + HOWTO (R_FR30_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_FR30_32", /* name */ + true, /* partial_inplace */ + 0x00000000, /* src_mask */ + 0xffffffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* A 32 bit into 48 bits absolute relocation. */ + HOWTO (R_FR30_48, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + fr30_elf_i32_reloc, /* special_function */ + "R_FR30_48", /* name */ + true, /* partial_inplace */ + 0x00000000, /* src_mask */ + 0xffffffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* A 6 bit absolute relocation. */ + HOWTO (R_FR30_6_IN_4, /* type */ + 2, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 6, /* bitsize */ + false, /* pc_relative */ + 4, /* bitpos */ + complain_overflow_unsigned, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_FR30_6_IN_4", /* name */ + true, /* partial_inplace */ + 0x0000, /* src_mask */ + 0x00f0, /* dst_mask */ + false), /* pcrel_offset */ + + /* An 8 bit absolute relocation. */ + HOWTO (R_FR30_8_IN_8, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 8, /* bitsize */ + false, /* pc_relative */ + 4, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + bfd_elf_generic_reloc,/* special_function */ + "R_FR30_8_IN_8", /* name */ + true, /* partial_inplace */ + 0x0000, /* src_mask */ + 0x0ff0, /* dst_mask */ + false), /* pcrel_offset */ + + /* A 9 bit absolute relocation. */ + HOWTO (R_FR30_9_IN_8, /* type */ + 1, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 9, /* bitsize */ + false, /* pc_relative */ + 4, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + bfd_elf_generic_reloc,/* special_function */ + "R_FR30_9_IN_8", /* name */ + true, /* partial_inplace */ + 0x0000, /* src_mask */ + 0x0ff0, /* dst_mask */ + false), /* pcrel_offset */ + + /* A 10 bit absolute relocation. */ + HOWTO (R_FR30_10_IN_8, /* type */ + 2, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 10, /* bitsize */ + false, /* pc_relative */ + 4, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + bfd_elf_generic_reloc,/* special_function */ + "R_FR30_10_IN_8", /* name */ + true, /* partial_inplace */ + 0x0000, /* src_mask */ + 0x0ff0, /* dst_mask */ + false), /* pcrel_offset */ + + /* A PC relative 9 bit relocation, right shifted by 1. */ + HOWTO (R_FR30_9_PCREL, /* type */ + 1, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 9, /* bitsize */ + true, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_FR30_9_PCREL", /* name */ + false, /* partial_inplace */ + 0x0000, /* src_mask */ + 0x00ff, /* dst_mask */ + false), /* pcrel_offset */ + + /* A PC relative 12 bit relocation, right shifted by 1. */ + HOWTO (R_FR30_12_PCREL, /* type */ + 1, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 12, /* bitsize */ + true, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_FR30_12_PCREL", /* name */ + false, /* partial_inplace */ + 0x0000, /* src_mask */ + 0x07ff, /* dst_mask */ + false), /* pcrel_offset */ + /* GNU extension to record C++ vtable hierarchy */ + HOWTO (R_FR30_GNU_VTINHERIT, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 0, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + NULL, /* special_function */ + "R_FR30_GNU_VTINHERIT", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + false), /* pcrel_offset */ + + /* GNU extension to record C++ vtable member usage */ + HOWTO (R_FR30_GNU_VTENTRY, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 0, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + _bfd_elf_rel_vtable_reloc_fn, /* special_function */ + "R_FR30_GNU_VTENTRY", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + false), /* pcrel_offset */ + +}; + +/* Utility to actually perform an R_FR30_20 reloc. */ + +static bfd_reloc_status_type +fr30_elf_i20_reloc (abfd, reloc_entry, symbol, data, + input_section, output_bfd, error_message) + bfd * abfd; + arelent * reloc_entry; + asymbol * symbol; + PTR data; + asection * input_section; + bfd * output_bfd; + char ** error_message; +{ + bfd_vma relocation; + unsigned long x; + + /* This part is from bfd_elf_generic_reloc. */ + if (output_bfd != (bfd *) NULL + && (symbol->flags & BSF_SECTION_SYM) == 0 + && (! reloc_entry->howto->partial_inplace + || reloc_entry->addend == 0)) + { + reloc_entry->address += input_section->output_offset; + return bfd_reloc_ok; + } + + if (output_bfd != NULL) + /* FIXME: See bfd_perform_relocation. Is this right? */ + return bfd_reloc_ok; + + relocation = + symbol->value + + symbol->section->output_section->vma + + symbol->section->output_offset + + reloc_entry->addend; + + if (relocation > ((1U << 20) - 1)) + return bfd_reloc_overflow; + + x = bfd_get_32 (abfd, data + reloc_entry->address); + x = (x & 0xff0f0000) | (relocation & 0x0000ffff) | ((relocation & 0x000f0000) << 4); + bfd_put_32 (abfd, x, data + reloc_entry->address); + + return bfd_reloc_ok; +} + + +/* Utility to actually perform a R_FR30_48 reloc. */ + +static bfd_reloc_status_type +fr30_elf_i32_reloc (abfd, reloc_entry, symbol, data, + input_section, output_bfd, error_message) + bfd * abfd; + arelent * reloc_entry; + asymbol * symbol; + PTR data; + asection * input_section; + bfd * output_bfd; + char ** error_message; +{ + bfd_vma relocation; + + /* This part is from bfd_elf_generic_reloc. */ + if (output_bfd != (bfd *) NULL + && (symbol->flags & BSF_SECTION_SYM) == 0 + && (! reloc_entry->howto->partial_inplace + || reloc_entry->addend == 0)) + { + reloc_entry->address += input_section->output_offset; + return bfd_reloc_ok; + } + + if (output_bfd != NULL) + /* FIXME: See bfd_perform_relocation. Is this right? */ + return bfd_reloc_ok; + + relocation = + symbol->value + + symbol->section->output_section->vma + + symbol->section->output_offset + + reloc_entry->addend; + + bfd_put_32 (abfd, relocation, data + reloc_entry->address + 2); + + return bfd_reloc_ok; +} + +/* Map BFD reloc types to FR30 ELF reloc types. */ + +struct fr30_reloc_map +{ + bfd_reloc_code_real_type bfd_reloc_val; + unsigned int fr30_reloc_val; +}; + +static const struct fr30_reloc_map fr30_reloc_map [] = +{ + { BFD_RELOC_NONE, R_FR30_NONE }, + { BFD_RELOC_8, R_FR30_8 }, + { BFD_RELOC_FR30_20, R_FR30_20 }, + { BFD_RELOC_32, R_FR30_32 }, + { BFD_RELOC_FR30_48, R_FR30_48 }, + { BFD_RELOC_FR30_6_IN_4, R_FR30_6_IN_4 }, + { BFD_RELOC_FR30_8_IN_8, R_FR30_8_IN_8 }, + { BFD_RELOC_FR30_9_IN_8, R_FR30_9_IN_8 }, + { BFD_RELOC_FR30_10_IN_8, R_FR30_10_IN_8 }, + { BFD_RELOC_FR30_9_PCREL, R_FR30_9_PCREL }, + { BFD_RELOC_FR30_12_PCREL, R_FR30_12_PCREL }, + { BFD_RELOC_VTABLE_INHERIT, R_FR30_GNU_VTINHERIT }, + { BFD_RELOC_VTABLE_ENTRY, R_FR30_GNU_VTENTRY }, +}; + +static reloc_howto_type * +fr30_reloc_type_lookup (abfd, code) + bfd * abfd; + bfd_reloc_code_real_type code; +{ + unsigned int i; + + for (i = sizeof (fr30_reloc_map) / sizeof (fr30_reloc_map[0]); + --i;) + if (fr30_reloc_map [i].bfd_reloc_val == code) + return & fr30_elf_howto_table [fr30_reloc_map[i].fr30_reloc_val]; + + return NULL; +} + +/* Set the howto pointer for an FR30 ELF reloc. */ + +static void +fr30_info_to_howto_rela (abfd, cache_ptr, dst) + bfd * abfd; + arelent * cache_ptr; + Elf32_Internal_Rela * dst; +{ + unsigned int r_type; + + r_type = ELF32_R_TYPE (dst->r_info); + BFD_ASSERT (r_type < (unsigned int) R_FR30_max); + cache_ptr->howto = & fr30_elf_howto_table [r_type]; +} + +/* Perform a single relocation. By default we use the standard BFD + routines, but a few relocs, we have to do them ourselves. */ + +static bfd_reloc_status_type +fr30_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; +{ + bfd_reloc_status_type r = bfd_reloc_ok; + bfd_vma x; + bfd_signed_vma srel; + + switch (howto->type) + { + case R_FR30_20: + contents += rel->r_offset; + relocation += rel->r_addend; + + if (relocation > ((1 << 20) - 1)) + return bfd_reloc_overflow; + + x = bfd_get_32 (input_bfd, contents); + x = (x & 0xff0f0000) | (relocation & 0x0000ffff) | ((relocation & 0x000f0000) << 4); + bfd_put_32 (input_bfd, x, contents); + break; + + case R_FR30_48: + contents += rel->r_offset + 2; + relocation += rel->r_addend; + bfd_put_32 (input_bfd, relocation, contents); + break; + + case R_FR30_9_PCREL: + contents += rel->r_offset + 1; + 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; + if (srel > ((1 << 8) - 1) || (srel < - (1 << 8))) + return bfd_reloc_overflow; + + bfd_put_8 (input_bfd, srel >> 1, contents); + break; + + case R_FR30_12_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; + if (srel > ((1 << 11) - 1) || (srel < - (1 << 11))) + return bfd_reloc_overflow; + + x = bfd_get_16 (input_bfd, contents); + x = (x & 0xf800) | ((srel >> 1) & 0x7ff); + bfd_put_16 (input_bfd, x, contents); + break; + + default: + r = _bfd_final_link_relocate (howto, input_bfd, input_section, + contents, rel->r_offset, + relocation, rel->r_addend); + } + + return r; +} + + +/* Relocate an FR30 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 relocateable + 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 relocateable 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 boolean +fr30_elf_relocate_section (output_bfd, info, input_bfd, input_section, + contents, relocs, local_syms, local_sections) + bfd * output_bfd; + 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; + + symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; + sym_hashes = elf_sym_hashes (input_bfd); + relend = relocs + input_section->reloc_count; + + 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); + + if ( r_type == R_FR30_GNU_VTINHERIT + || r_type == R_FR30_GNU_VTENTRY) + continue; + + r_symndx = ELF32_R_SYM (rel->r_info); + + if (info->relocateable) + { + /* This is a relocateable link. We don't have to change + anything, unless the reloc is against a section symbol, + in which case we have to adjust according to where the + section symbol winds up in the output section. */ + if (r_symndx < symtab_hdr->sh_info) + { + sym = local_syms + r_symndx; + + if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) + { + sec = local_sections [r_symndx]; + rel->r_addend += sec->output_offset + sym->st_value; + } + } + + continue; + } + + /* This is a final link. */ + howto = fr30_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; +#if 0 + fprintf (stderr, "local: sec: %s, sym: %s (%d), value: %x + %x + %x addend %x\n", + sec->name, name, sym->st_name, + sec->output_section->vma, sec->output_offset, + sym->st_value, rel->r_addend); +#endif + } + 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); +#if 0 + fprintf (stderr, + "defined: sec: %s, name: %s, value: %x + %x + %x gives: %x\n", + sec->name, name, h->root.u.def.value, + sec->output_section->vma, sec->output_offset, relocation); +#endif + } + else if (h->root.type == bfd_link_hash_undefweak) + { +#if 0 + fprintf (stderr, "undefined: sec: %s, name: %s\n", + sec->name, name); +#endif + relocation = 0; + } + else + { + if (! ((*info->callbacks->undefined_symbol) + (info, h->root.root.string, input_bfd, + input_section, rel->r_offset))) + return false; +#if 0 + fprintf (stderr, "unknown: name: %s\n", name); +#endif + relocation = 0; + } + } + + r = fr30_final_link_relocate (howto, input_bfd, input_section, + contents, rel, relocation); + + if (r != bfd_reloc_ok) + { + const char * msg = (const char *) NULL; + + 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); + break; + + case bfd_reloc_undefined: + r = info->callbacks->undefined_symbol + (info, name, input_bfd, input_section, rel->r_offset); + 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 * +fr30_elf_gc_mark_hook (abfd, info, rel, h, sym) + bfd * abfd; + struct bfd_link_info * info; + Elf_Internal_Rela * rel; + struct elf_link_hash_entry * h; + Elf_Internal_Sym * sym; +{ + if (h != NULL) + { + switch (ELF32_R_TYPE (rel->r_info)) + { + case R_FR30_GNU_VTINHERIT: + case R_FR30_GNU_VTENTRY: + break; + + 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; + } + } + } + else + { + if (!(elf_bad_symtab (abfd) + && 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 (abfd, sym->st_shndx); + } + } + + return NULL; +} + +/* Update the got entry reference counts for the section being removed. */ + +static boolean +fr30_elf_gc_sweep_hook (abfd, info, sec, relocs) + bfd * abfd; + struct bfd_link_info * info; + asection * sec; + const Elf_Internal_Rela * relocs; +{ + 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 boolean +fr30_elf_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; + + if (info->relocateable) + return true; + + 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; + + 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]; + + switch (ELF32_R_TYPE (rel->r_info)) + { + /* This relocation describes the C++ object vtable hierarchy. + Reconstruct it for later use during GC. */ + case R_FR30_GNU_VTINHERIT: + if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) + return false; + break; + + /* This relocation describes which C++ vtable entries are actually + used. Record for later use during GC. */ + case R_FR30_GNU_VTENTRY: + if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend)) + return false; + break; + } + } + + return true; +} + +#define ELF_ARCH bfd_arch_fr30 +#define ELF_MACHINE_CODE EM_CYGNUS_FR30 +#define ELF_MAXPAGESIZE 0x1000 + +#define TARGET_BIG_SYM bfd_elf32_fr30_vec +#define TARGET_BIG_NAME "elf32-fr30" + +#define elf_info_to_howto_rel NULL +#define elf_info_to_howto fr30_info_to_howto_rela +#define elf_backend_relocate_section fr30_elf_relocate_section +#define elf_backend_gc_mark_hook fr30_elf_gc_mark_hook +#define elf_backend_gc_sweep_hook fr30_elf_gc_sweep_hook +#define elf_backend_check_relocs fr30_elf_check_relocs + +#define elf_backend_can_gc_sections 1 + +#define bfd_elf32_bfd_reloc_type_lookup fr30_reloc_type_lookup + +#include "elf32-target.h" |