diff options
Diffstat (limited to 'bfd/elf32-iq2000.c')
| -rw-r--r-- | bfd/elf32-iq2000.c | 915 |
1 files changed, 915 insertions, 0 deletions
diff --git a/bfd/elf32-iq2000.c b/bfd/elf32-iq2000.c new file mode 100644 index 0000000..a6bf8d2 --- /dev/null +++ b/bfd/elf32-iq2000.c @@ -0,0 +1,915 @@ +/* IQ2000-specific support for 32-bit ELF. + Copyright (C) 2003-2014 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 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ + +#include "sysdep.h" +#include "bfd.h" +#include "libbfd.h" +#include "elf-bfd.h" +#include "elf/iq2000.h" + +/* Forward declarations. */ + +static bfd_reloc_status_type iq2000_elf_howto_hi16_reloc (bfd *, arelent *, asymbol *, void *, 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 */ + + +static bfd_reloc_status_type +iq2000_elf_howto_hi16_reloc (bfd *abfd ATTRIBUTE_UNUSED, + arelent *reloc_entry, + asymbol *symbol, + void * 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 (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 bfd_reloc_status_type +iq2000_elf_relocate_offset16 (bfd *input_bfd, + Elf_Internal_Rela *rel, + bfd_byte *contents, + bfd_vma value, + bfd_vma location) +{ + bfd_vma insn; + bfd_vma jtarget; + + insn = bfd_get_32 (input_bfd, contents + rel->r_offset); + + value += rel->r_addend; + + if (value & 3) + return bfd_reloc_dangerous; + + jtarget = (value & 0x3fffc) | (location & 0xf0000000L); + + if (jtarget != value) + return bfd_reloc_overflow; + + insn = (insn & ~0xFFFF) | ((value >> 2) & 0xFFFF); + + bfd_put_32 (input_bfd, insn, contents + rel->r_offset); + return bfd_reloc_ok; +} + +/* Map BFD reloc types to IQ2000 ELF reloc types. */ + +static reloc_howto_type * +iq2000_reloc_type_lookup (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; +} + +static reloc_howto_type * +iq2000_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name) +{ + unsigned int i; + + for (i = 0; + i < (sizeof (iq2000_elf_howto_table) + / sizeof (iq2000_elf_howto_table[0])); + i++) + if (iq2000_elf_howto_table[i].name != NULL + && strcasecmp (iq2000_elf_howto_table[i].name, r_name) == 0) + return &iq2000_elf_howto_table[i]; + + if (strcasecmp (iq2000_elf_vtinherit_howto.name, r_name) == 0) + return &iq2000_elf_vtinherit_howto; + if (strcasecmp (iq2000_elf_vtentry_howto.name, r_name) == 0) + return &iq2000_elf_vtentry_howto; + + return NULL; +} + +/* Perform a single relocation. By default we use the standard BFD + routines. */ + +static bfd_reloc_status_type +iq2000_final_link_relocate (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 (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 (bfd *abfd, + struct bfd_link_info *info, + asection *sec, + const Elf_Internal_Rela *relocs) +{ + Elf_Internal_Shdr *symtab_hdr; + struct elf_link_hash_entry **sym_hashes; + const Elf_Internal_Rela *rel; + const Elf_Internal_Rela *rel_end; + bfd_boolean changed = FALSE; + + if (info->relocatable) + return TRUE; + + symtab_hdr = &elf_tdata (abfd)->symtab_hdr; + sym_hashes = elf_sym_hashes (abfd); + + rel_end = relocs + sec->reloc_count; + for (rel = relocs; rel < rel_end; rel++) + { + struct elf_link_hash_entry *h; + unsigned long r_symndx; + + r_symndx = ELF32_R_SYM (rel->r_info); + if (r_symndx < symtab_hdr->sh_info) + h = NULL; + else + { + h = sym_hashes[r_symndx - symtab_hdr->sh_info]; + while (h->root.type == bfd_link_hash_indirect + || h->root.type == bfd_link_hash_warning) + h = (struct elf_link_hash_entry *) h->root.u.i.link; + + /* PR15323, ref flags aren't set for references in the same + object. */ + h->root.non_ir_ref = 1; + } + + 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_elf_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: + BFD_ASSERT (h != NULL); + if (h != NULL + && !bfd_elf_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 (CONST_STRNEQ (sec->name, ".debug") + || CONST_STRNEQ (sec->name, ".stab") + || CONST_STRNEQ (sec->name, ".eh_frame")) + { + ((Elf_Internal_Rela *) rel)->r_info + = ELF32_R_INFO (ELF32_R_SYM (rel->r_info), R_IQ2000_32_DEBUG); + changed = TRUE; + } + break; + } + } + + if (changed) + /* Note that we've changed relocs, otherwise if !info->keep_memory + we'll free the relocs and lose our changes. */ + elf_section_data (sec)->relocs = (Elf_Internal_Rela *) relocs; + + 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 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 +iq2000_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; + + 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); + + howto = iq2000_elf_howto_table + ELF32_R_TYPE (rel->r_info); + h = NULL; + sym = NULL; + sec = NULL; + + if (r_symndx < symtab_hdr->sh_info) + { + asection *osec; + + sym = local_syms + r_symndx; + osec = sec = local_sections [r_symndx]; + if ((sec->flags & SEC_MERGE) + && ELF_ST_TYPE (sym->st_info) == STT_SECTION) + /* This relocation is relative to a section symbol that is + going to be merged. Change it so that it is relative + to the merged section symbol. */ + rel->r_addend = _bfd_elf_rel_local_sym (output_bfd, sym, &sec, + rel->r_addend); + + 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, osec) : name; + } + else + { + bfd_boolean unresolved_reloc; + bfd_boolean warned, ignored; + + RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, + r_symndx, symtab_hdr, sym_hashes, + h, sec, relocation, + unresolved_reloc, warned, ignored); + + name = h->root.root.string; + } + + if (sec != NULL && discarded_section (sec)) + RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, + rel, 1, relend, howto, 0, contents); + + if (info->relocatable) + continue; + + switch (r_type) + { + case R_IQ2000_HI16: + r = iq2000_elf_relocate_hi16 (input_bfd, rel, contents, relocation); + break; + + case R_IQ2000_OFFSET_16: + r = iq2000_elf_relocate_offset16 (input_bfd, rel, contents, relocation, + input_section->output_section->vma + + input_section->output_offset + + rel->r_offset); + 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, (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 * +iq2000_elf_gc_mark_hook (asection *sec, + 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_IQ2000_GNU_VTINHERIT: + case R_IQ2000_GNU_VTENTRY: + return NULL; + } + + return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); +} + + +/* Return the MACH for an e_flags value. */ + +static int +elf32_iq2000_machine (bfd *abfd) +{ + switch (elf_elfheader (abfd)->e_flags & EF_IQ2000_CPU_MASK) + { + case EF_IQ2000_CPU_IQ10: + return bfd_mach_iq10; + + case EF_IQ2000_CPU_IQ2000: + default: + return bfd_mach_iq2000; + } +} + + +/* Function to set the ELF flag bits. */ + +static bfd_boolean +iq2000_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 +iq2000_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; + + 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) + { + /* Warn if different cpu is used, but 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) + { + switch (new_partial) + { + case EF_IQ2000_CPU_IQ10: + strcat (new_opt, " -m10"); + break; + + default: + case EF_IQ2000_CPU_IQ2000: + strcat (new_opt, " -m2000"); + break; + } + + switch (old_partial) + { + case EF_IQ2000_CPU_IQ10: + strcat (old_opt, " -m10"); + break; + + default: + case EF_IQ2000_CPU_IQ2000: + strcat (old_opt, " -m2000"); + 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 (bfd *abfd, void * 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:"), (unsigned long) flags); + + switch (flags & EF_IQ2000_CPU_MASK) + { + case EF_IQ2000_CPU_IQ10: + fprintf (file, " -m10"); + break; + case EF_IQ2000_CPU_IQ2000: + fprintf (file, " -m2000"); + break; + default: + break; + } + + fputc ('\n', file); + return TRUE; +} + +static +bfd_boolean +iq2000_elf_object_p (bfd *abfd) +{ + 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 iq2000_elf32_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_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_reloc_name_lookup iq2000_reloc_name_lookup +#define bfd_elf32_bfd_set_private_flags iq2000_elf_set_private_flags +#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" |