| /* IQ2000-specific support for 32-bit ELF. |
| Copyright (C) 2003-2021 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" |
| #include "libiberty.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 */ |
| 3, /* size (0 = byte, 1 = short, 2 = long) */ |
| 0, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_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 bool |
| 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: |
| if (r_type >= ARRAY_SIZE (iq2000_elf_howto_table)) |
| { |
| /* xgettext:c-format */ |
| _bfd_error_handler (_("%pB: unsupported relocation type %#x"), |
| abfd, r_type); |
| bfd_set_error (bfd_error_bad_value); |
| return false; |
| } |
| cache_ptr->howto = & iq2000_elf_howto_table [r_type]; |
| break; |
| } |
| 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 bool |
| 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; |
| bool changed = false; |
| |
| if (bfd_link_relocatable (info)) |
| return true; |
| |
| symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| sym_hashes = elf_sym_hashes (abfd); |
| |
| rel_end = relocs + sec->reloc_count; |
| for (rel = relocs; rel < rel_end; rel++) |
| { |
| struct elf_link_hash_entry *h; |
| unsigned long r_symndx; |
| |
| r_symndx = ELF32_R_SYM (rel->r_info); |
| if (r_symndx < symtab_hdr->sh_info) |
| h = NULL; |
| else |
| { |
| h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| while (h->root.type == bfd_link_hash_indirect |
| || h->root.type == bfd_link_hash_warning) |
| h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| } |
| |
| 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: |
| if (!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 (startswith (sec->name, ".debug") |
| || startswith (sec->name, ".stab") |
| || startswith (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 int |
| 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 (osec) : name; |
| } |
| else |
| { |
| bool unresolved_reloc; |
| bool 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 (bfd_link_relocatable (info)) |
| 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: |
| (*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: |
| (*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) |
| (*info->callbacks->warning) (info, msg, name, input_bfd, |
| input_section, rel->r_offset); |
| } |
| } |
| |
| 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 bool |
| 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 bool |
| iq2000_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info) |
| { |
| bfd *obfd = info->output_bfd; |
| flagword old_flags, old_partial; |
| flagword new_flags, new_partial; |
| bool 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 |
| /* xgettext:c-format */ |
| (_("%pB: compiled with %s and linked with modules compiled with %s"), |
| 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 |
| /* xgettext:c-format */ |
| (_("%pB: uses different e_flags (%#x) fields than previous modules (%#x)"), |
| ibfd, new_flags, old_flags); |
| } |
| } |
| |
| if (error) |
| bfd_set_error (bfd_error_bad_value); |
| |
| return !error; |
| } |
| |
| |
| static bool |
| 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 |
| bool |
| 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" |