diff options
Diffstat (limited to 'bfd/elf32-iq2000.c')
| -rw-r--r-- | bfd/elf32-iq2000.c | 974 |
1 files changed, 974 insertions, 0 deletions
diff --git a/bfd/elf32-iq2000.c b/bfd/elf32-iq2000.c new file mode 100644 index 0000000..c4261bf --- /dev/null +++ b/bfd/elf32-iq2000.c @@ -0,0 +1,974 @@ +/* IQ2000-specific support for 32-bit ELF. + Copyright (C) 2003 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/iq2000.h" + +/* Forward declarations. */ + +/* Private relocation functions. */ +static bfd_reloc_status_type iq2000_elf_relocate_hi16 PARAMS ((bfd *, Elf_Internal_Rela *, bfd_byte *, bfd_vma)); +static reloc_howto_type * iq2000_reloc_type_lookup PARAMS ((bfd *, bfd_reloc_code_real_type)); +static void iq2000_info_to_howto_rela PARAMS ((bfd *, arelent *, Elf_Internal_Rela *)); +static bfd_boolean iq2000_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 iq2000_final_link_relocate PARAMS ((reloc_howto_type *, bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, bfd_vma)); +static bfd_boolean iq2000_elf_gc_sweep_hook PARAMS ((bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *)); +static asection * iq2000_elf_gc_mark_hook PARAMS ((asection *sec, struct bfd_link_info *, Elf_Internal_Rela *, struct elf_link_hash_entry *, Elf_Internal_Sym *)); +static reloc_howto_type * iq2000_reloc_type_lookup PARAMS ((bfd *, bfd_reloc_code_real_type)); +static int elf32_iq2000_machine PARAMS ((bfd *)); +static bfd_boolean iq2000_elf_object_p PARAMS ((bfd *)); +static bfd_boolean iq2000_elf_set_private_flags PARAMS ((bfd *, flagword)); +static bfd_boolean iq2000_elf_copy_private_bfd_data PARAMS ((bfd *, bfd *)); +static bfd_boolean iq2000_elf_merge_private_bfd_data PARAMS ((bfd *, bfd *)); +static bfd_boolean iq2000_elf_print_private_bfd_data PARAMS ((bfd *, PTR)); +static bfd_boolean iq2000_elf_check_relocs PARAMS ((bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *)); +static bfd_reloc_status_type iq2000_elf_howto_hi16_reloc PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); + + +static reloc_howto_type iq2000_elf_howto_table [] = +{ + /* This reloc does nothing. */ + + HOWTO (R_IQ2000_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_IQ2000_NONE", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* A 16 bit absolute relocation. */ + HOWTO (R_IQ2000_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_IQ2000_16", /* name */ + FALSE, /* partial_inplace */ + 0x0000, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* A 32 bit absolute relocation. */ + HOWTO (R_IQ2000_32, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 31, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_IQ2000_32", /* name */ + FALSE, /* partial_inplace */ + 0x00000000, /* src_mask */ + 0x7fffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* 26 bit branch address. */ + HOWTO (R_IQ2000_26, /* type */ + 2, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 26, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + /* This needs complex overflow + detection, because the upper four + bits must match the PC. */ + bfd_elf_generic_reloc, /* special_function */ + "R_IQ2000_26", /* name */ + FALSE, /* partial_inplace */ + 0x00000000, /* src_mask */ + 0x03ffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* 16 bit PC relative reference. */ + HOWTO (R_IQ2000_PC16, /* type */ + 2, /* rightshift */ + 2, /* 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_IQ2000_PC16", /* name */ + FALSE, /* partial_inplace */ + 0x0000, /* src_mask */ + 0xffff, /* dst_mask */ + TRUE), /* pcrel_offset */ + + /* high 16 bits of symbol value. */ + HOWTO (R_IQ2000_HI16, /* type */ + 16, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 15, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + iq2000_elf_howto_hi16_reloc, /* special_function */ + "R_IQ2000_HI16", /* name */ + FALSE, /* partial_inplace */ + 0x0000, /* src_mask */ + 0x7fff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* Low 16 bits of symbol value. */ + HOWTO (R_IQ2000_LO16, /* type */ + 0, /* rightshift */ + 2, /* 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_IQ2000_LO16", /* name */ + FALSE, /* partial_inplace */ + 0x0000, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* 16-bit jump offset. */ + HOWTO (R_IQ2000_OFFSET_16, /* type */ + 2, /* rightshift */ + 2, /* 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_IQ2000_OFFSET_16", /* name */ + FALSE, /* partial_inplace */ + 0x0000, /* src_mask */ + 0xffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* 21-bit jump offset. */ + HOWTO (R_IQ2000_OFFSET_21, /* type */ + 2, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 21, /* bitsize */ + FALSE, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_dont, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_IQ2000_OFFSET_21", /* name */ + FALSE, /* partial_inplace */ + 0x000000, /* src_mask */ + 0x1fffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* unsigned high 16 bits of value. */ + HOWTO (R_IQ2000_OFFSET_21, /* type */ + 16, /* rightshift */ + 2, /* 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_IQ2000_UHI16", /* name */ + FALSE, /* partial_inplace */ + 0x0000, /* src_mask */ + 0x7fff, /* dst_mask */ + FALSE), /* pcrel_offset */ + + /* A 32 bit absolute debug relocation. */ + HOWTO (R_IQ2000_32_DEBUG, /* 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_IQ2000_32", /* name */ + FALSE, /* partial_inplace */ + 0x00000000, /* src_mask */ + 0xffffffff, /* dst_mask */ + FALSE), /* pcrel_offset */ + +}; + +/* GNU extension to record C++ vtable hierarchy. */ +static reloc_howto_type iq2000_elf_vtinherit_howto = + HOWTO (R_IQ2000_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_IQ2000_GNU_VTINHERIT", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + FALSE); /* pcrel_offset */ + +/* GNU extension to record C++ vtable member usage. */ +static reloc_howto_type iq2000_elf_vtentry_howto = + HOWTO (R_IQ2000_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 */ + NULL, /* special_function */ + "R_IQ2000_GNU_VTENTRY", /* name */ + FALSE, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + FALSE); /* pcrel_offset */ + + +/* Map BFD reloc types to IQ2000 ELF reloc types. */ + +struct iq2000_reloc_map +{ + bfd_reloc_code_real_type bfd_reloc_val; + unsigned int iq2000_reloc_val; +}; + +static const struct iq2000_reloc_map iq2000_reloc_map [] = +{ + { BFD_RELOC_NONE, R_IQ2000_NONE }, + { BFD_RELOC_16, R_IQ2000_16 }, + { BFD_RELOC_32, R_IQ2000_32 }, + { BFD_RELOC_MIPS_JMP, R_IQ2000_26 }, + { BFD_RELOC_16_PCREL_S2, R_IQ2000_PC16 }, + { BFD_RELOC_HI16, R_IQ2000_HI16 }, + { BFD_RELOC_LO16, R_IQ2000_LO16 }, + { BFD_RELOC_IQ2000_OFFSET_16,R_IQ2000_OFFSET_16 }, + { BFD_RELOC_IQ2000_OFFSET_21,R_IQ2000_OFFSET_21 }, + { BFD_RELOC_IQ2000_UHI16, R_IQ2000_UHI16 }, + { BFD_RELOC_VTABLE_INHERIT, R_IQ2000_GNU_VTINHERIT }, + { BFD_RELOC_VTABLE_ENTRY, R_IQ2000_GNU_VTENTRY }, +}; + +static bfd_reloc_status_type +iq2000_elf_howto_hi16_reloc (abfd, + reloc_entry, + symbol, + data, + input_section, + output_bfd, + error_message) + bfd *abfd ATTRIBUTE_UNUSED; + arelent *reloc_entry; + asymbol *symbol; + PTR data; + asection *input_section; + bfd *output_bfd; + char **error_message ATTRIBUTE_UNUSED; +{ + bfd_reloc_status_type ret; + bfd_vma relocation; + + /* If we're relocating, and this an external symbol, we don't want + to change anything. */ + if (output_bfd != (bfd *) NULL + && (symbol->flags & BSF_SECTION_SYM) == 0 + && reloc_entry->addend == 0) + { + reloc_entry->address += input_section->output_offset; + return bfd_reloc_ok; + } + + if (bfd_is_com_section (symbol->section)) + relocation = 0; + else + relocation = symbol->value; + + relocation += symbol->section->output_section->vma; + relocation += symbol->section->output_offset; + relocation += reloc_entry->addend; + + /* if %lo will have sign-extension, compensate by add 0x10000 to hi portion */ + if (relocation & 0x8000) + reloc_entry->addend += 0x10000; + + /* Now do the reloc in the usual way. */ + ret = bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, + input_section, output_bfd, error_message); + + /* put it back the way it was */ + if (relocation & 0x8000) + reloc_entry->addend -= 0x10000; + + return ret; +} + +static bfd_reloc_status_type +iq2000_elf_relocate_hi16 (input_bfd, relhi, contents, value) + bfd *input_bfd; + Elf_Internal_Rela *relhi; + bfd_byte *contents; + bfd_vma value; +{ + bfd_vma insn; + + insn = bfd_get_32 (input_bfd, contents + relhi->r_offset); + + value += relhi->r_addend; + value &= 0x7fffffff; /* mask off top-bit which is Harvard mask bit */ + + /* if top-bit of %lo value is on, this means that %lo will + sign-propagate and so we compensate by adding 1 to %hi value */ + if (value & 0x8000) + value += 0x10000; + + value >>= 16; + insn = ((insn & ~0xFFFF) | value); + + bfd_put_32 (input_bfd, insn, contents + relhi->r_offset); + return bfd_reloc_ok; +} + +static reloc_howto_type * +iq2000_reloc_type_lookup (abfd, code) + bfd * abfd ATTRIBUTE_UNUSED; + bfd_reloc_code_real_type code; +{ + /* Note that the iq2000_elf_howto_table is indxed by the R_ + constants. Thus, the order that the howto records appear in the + table *must* match the order of the relocation types defined in + include/elf/iq2000.h. */ + + switch (code) + { + case BFD_RELOC_NONE: + return &iq2000_elf_howto_table[ (int) R_IQ2000_NONE]; + case BFD_RELOC_16: + return &iq2000_elf_howto_table[ (int) R_IQ2000_16]; + case BFD_RELOC_32: + return &iq2000_elf_howto_table[ (int) R_IQ2000_32]; + case BFD_RELOC_MIPS_JMP: + return &iq2000_elf_howto_table[ (int) R_IQ2000_26]; + case BFD_RELOC_IQ2000_OFFSET_16: + return &iq2000_elf_howto_table[ (int) R_IQ2000_OFFSET_16]; + case BFD_RELOC_IQ2000_OFFSET_21: + return &iq2000_elf_howto_table[ (int) R_IQ2000_OFFSET_21]; + case BFD_RELOC_16_PCREL_S2: + return &iq2000_elf_howto_table[ (int) R_IQ2000_PC16]; + case BFD_RELOC_HI16: + return &iq2000_elf_howto_table[ (int) R_IQ2000_HI16]; + case BFD_RELOC_IQ2000_UHI16: + return &iq2000_elf_howto_table[ (int) R_IQ2000_UHI16]; + case BFD_RELOC_LO16: + return &iq2000_elf_howto_table[ (int) R_IQ2000_LO16]; + case BFD_RELOC_VTABLE_INHERIT: + return &iq2000_elf_vtinherit_howto; + case BFD_RELOC_VTABLE_ENTRY: + return &iq2000_elf_vtentry_howto; + default: + /* Pacify gcc -Wall. */ + return NULL; + } + return NULL; +} + + +/* Perform a single relocation. By default we use the standard BFD + routines. */ + +static bfd_reloc_status_type +iq2000_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; +{ + return _bfd_final_link_relocate (howto, input_bfd, input_section, + contents, rel->r_offset, + relocation, rel->r_addend); +} + +/* Set the howto pointer for a IQ2000 ELF reloc. */ + +static void +iq2000_info_to_howto_rela (abfd, cache_ptr, dst) + bfd * abfd ATTRIBUTE_UNUSED; + arelent * cache_ptr; + Elf_Internal_Rela * dst; +{ + unsigned int r_type; + + r_type = ELF32_R_TYPE (dst->r_info); + switch (r_type) + { + case R_IQ2000_GNU_VTINHERIT: + cache_ptr->howto = & iq2000_elf_vtinherit_howto; + break; + + case R_IQ2000_GNU_VTENTRY: + cache_ptr->howto = & iq2000_elf_vtentry_howto; + break; + + default: + cache_ptr->howto = & iq2000_elf_howto_table [r_type]; + break; + } +} + +/* 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 +iq2000_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; + Elf_Internal_Rela *rel; + 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_IQ2000_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_IQ2000_GNU_VTENTRY: + if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend)) + return FALSE; + break; + + case R_IQ2000_32: + /* For debug section, change to special harvard-aware relocations */ + if (memcmp (sec->name, ".debug", 6) == 0 + || memcmp (sec->name, ".stab", 5) == 0 + || memcmp (sec->name, ".eh_frame", 9) == 0) + rel->r_info = ELF32_R_INFO (ELF32_R_SYM (rel->r_info), R_IQ2000_32_DEBUG); + break; + } + } + return TRUE; +} + + +/* Relocate a IQ2000 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 bfd_boolean +iq2000_elf_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; +{ + 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_IQ2000_GNU_VTINHERIT + || r_type == R_IQ2000_GNU_VTENTRY) + continue; + + r_symndx = ELF32_R_SYM (rel->r_info); + + /* This is a final link. */ + howto = iq2000_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; +#ifdef DEBUG + 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]; + + 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); +#ifdef DEBUG + 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) + { +#ifdef DEBUG + 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, + (!info->shared || info->no_undefined)))) + return FALSE; +#ifdef DEBUG + fprintf (stderr, "unknown: name: %s\n", name); +#endif + relocation = 0; + } + } + + switch (r_type) + { + case R_IQ2000_HI16: + r = iq2000_elf_relocate_hi16 (input_bfd, rel, contents, relocation); + break; + + case R_IQ2000_PC16: + rel->r_addend -= 4; + /* Fall through. */ + + default: + r = iq2000_final_link_relocate (howto, input_bfd, input_section, + contents, rel, relocation); + break; + } + + 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, 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; +} + + +/* Update the got entry reference counts for the section being + removed. */ + +static bfd_boolean +iq2000_elf_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; +{ + return TRUE; +} + +/* Return the section that should be marked against GC for a given + relocation. */ + +static asection * +iq2000_elf_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)) + { + case R_IQ2000_GNU_VTINHERIT: + case R_IQ2000_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; + + default: + break; + } + } + } + else + return bfd_section_from_elf_index (sec->owner, sym->st_shndx); + + return NULL; +} + + +/* Return the MACH for an e_flags value. */ + +static int +elf32_iq2000_machine (abfd) + bfd *abfd; +{ + switch (elf_elfheader (abfd)->e_flags & EF_IQ2000_CPU_MASK) + { + case EF_IQ2000_CPU_IQ2000: return bfd_mach_iq2000; + case EF_IQ2000_CPU_IQ10: return bfd_mach_iq10; + } + + return bfd_mach_iq2000; +} + + +/* Function to set the ELF flag bits. */ + +static bfd_boolean +iq2000_elf_set_private_flags (abfd, flags) + bfd *abfd; + flagword flags; +{ + elf_elfheader (abfd)->e_flags = flags; + elf_flags_init (abfd) = TRUE; + return TRUE; +} + +/* Copy backend specific data from one object module to another. */ + +static bfd_boolean +iq2000_elf_copy_private_bfd_data (ibfd, obfd) + bfd *ibfd; + bfd *obfd; +{ + if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour + || bfd_get_flavour (obfd) != bfd_target_elf_flavour) + return TRUE; + + BFD_ASSERT (!elf_flags_init (obfd) + || elf_elfheader (obfd)->e_flags == elf_elfheader (ibfd)->e_flags); + + elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags; + elf_flags_init (obfd) = TRUE; + return TRUE; +} + +/* Merge backend specific data from an object file to the output + object file when linking. */ + +static bfd_boolean +iq2000_elf_merge_private_bfd_data (ibfd, obfd) + 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_IQ2000_CPU_MASK); + old_partial = (old_flags & EF_IQ2000_CPU_MASK); + if (new_partial == old_partial) + ; + + else + { + switch (new_partial) + { + default: strcat (new_opt, " -m2000"); break; + case EF_IQ2000_CPU_IQ2000: strcat (new_opt, " -m2000"); break; + case EF_IQ2000_CPU_IQ10: strcat (new_opt, " -m10"); break; + } + + switch (old_partial) + { + default: strcat (old_opt, " -m2000"); break; + case EF_IQ2000_CPU_IQ2000: strcat (old_opt, " -m2000"); break; + case EF_IQ2000_CPU_IQ10: strcat (old_opt, " -m10"); 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_IQ2000_ALL_FLAGS; + old_flags &= ~ EF_IQ2000_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 +iq2000_elf_print_private_bfd_data (abfd, ptr) + 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_IQ2000_CPU_MASK) + { + default: break; + case EF_IQ2000_CPU_IQ2000: fprintf (file, " -m2000"); break; + case EF_IQ2000_CPU_IQ10: fprintf (file, " -m10"); break; + } + + fputc ('\n', file); +} + +static +bfd_boolean +iq2000_elf_object_p (abfd) + bfd *abfd; +{ + /* Irix 5 and 6 is broken. Object file symbol tables are not always + sorted correctly such that local symbols precede global symbols, + and the sh_info field in the symbol table is not always right. */ + elf_bad_symtab (abfd) = TRUE; + + bfd_default_set_arch_mach (abfd, bfd_arch_iq2000, + elf32_iq2000_machine (abfd)); + return TRUE; +} + + +#define ELF_ARCH bfd_arch_iq2000 +#define ELF_MACHINE_CODE EM_IQ2000 +#define ELF_MAXPAGESIZE 0x1000 + +#define TARGET_BIG_SYM bfd_elf32_iq2000_vec +#define TARGET_BIG_NAME "elf32-iq2000" + +#define elf_info_to_howto_rel NULL +#define elf_info_to_howto iq2000_info_to_howto_rela +#define elf_backend_relocate_section iq2000_elf_relocate_section +#define elf_backend_gc_mark_hook iq2000_elf_gc_mark_hook +#define elf_backend_gc_sweep_hook iq2000_elf_gc_sweep_hook +#define elf_backend_check_relocs iq2000_elf_check_relocs +#define elf_backend_object_p iq2000_elf_object_p +#define elf_backend_rela_normal 1 + +#define elf_backend_can_gc_sections 1 + +#define bfd_elf32_bfd_reloc_type_lookup iq2000_reloc_type_lookup +#define bfd_elf32_bfd_set_private_flags iq2000_elf_set_private_flags +#define bfd_elf32_bfd_copy_private_bfd_data iq2000_elf_copy_private_bfd_data +#define bfd_elf32_bfd_merge_private_bfd_data iq2000_elf_merge_private_bfd_data +#define bfd_elf32_bfd_print_private_bfd_data iq2000_elf_print_private_bfd_data + +#include "elf32-target.h" |