| /* M32R-specific support for 32-bit ELF. |
| Copyright (C) 1996, 1997, 1998, 1999 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/m32r.h" |
| |
| static bfd_reloc_status_type m32r_elf_10_pcrel_reloc |
| PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| static bfd_reloc_status_type m32r_elf_do_10_pcrel_reloc |
| PARAMS ((bfd *, reloc_howto_type *, asection *, |
| bfd_byte *, bfd_vma, asection *, bfd_vma, bfd_vma)); |
| static bfd_reloc_status_type m32r_elf_hi16_reloc |
| PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| static void m32r_elf_relocate_hi16 |
| PARAMS ((bfd *, int, Elf_Internal_Rela *, Elf_Internal_Rela *, |
| bfd_byte *, bfd_vma)); |
| bfd_reloc_status_type m32r_elf_lo16_reloc |
| PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| static bfd_reloc_status_type m32r_elf_sda16_reloc |
| PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup |
| PARAMS ((bfd *abfd, bfd_reloc_code_real_type code)); |
| static void m32r_info_to_howto_rel |
| PARAMS ((bfd *, arelent *, Elf32_Internal_Rel *)); |
| boolean _bfd_m32r_elf_section_from_bfd_section |
| PARAMS ((bfd *, Elf32_Internal_Shdr *, asection *, int *)); |
| void _bfd_m32r_elf_symbol_processing |
| PARAMS ((bfd *, asymbol *)); |
| static boolean m32r_elf_add_symbol_hook |
| PARAMS ((bfd *, struct bfd_link_info *, const Elf_Internal_Sym *, |
| const char **, flagword *, asection **, bfd_vma *)); |
| static boolean m32r_elf_relocate_section |
| PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, |
| Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); |
| #if 0 /* not yet */ |
| static boolean m32r_elf_relax_delete_bytes |
| PARAMS ((bfd *, asection *, bfd_vma, int)); |
| #endif |
| |
| static bfd_reloc_status_type m32r_elf_final_sda_base |
| PARAMS ((bfd *, struct bfd_link_info *, const char **, bfd_vma *)); |
| static boolean m32r_elf_object_p |
| PARAMS ((bfd *)); |
| static void m32r_elf_final_write_processing |
| PARAMS ((bfd *, boolean)); |
| static boolean m32r_elf_set_private_flags |
| PARAMS ((bfd *, flagword)); |
| static boolean m32r_elf_copy_private_bfd_data |
| PARAMS ((bfd *, bfd *)); |
| static boolean m32r_elf_merge_private_bfd_data |
| PARAMS ((bfd *, bfd *)); |
| static boolean m32r_elf_print_private_bfd_data |
| PARAMS ((bfd *, PTR)); |
| |
| #define NOP_INSN 0x7000 |
| #define MAKE_PARALLEL(insn) ((insn) | 0x8000) |
| |
| /* Use REL instead of RELA to save space. |
| This only saves space in libraries and object files, but perhaps |
| relocs will be put in ROM? All in all though, REL relocs are a pain |
| to work with. */ |
| #define USE_REL |
| |
| static reloc_howto_type m32r_elf_howto_table[] = |
| { |
| /* This reloc does nothing. */ |
| HOWTO (R_M32R_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_M32R_NONE", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* A 16 bit absolute relocation. */ |
| HOWTO (R_M32R_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_M32R_16", /* name */ |
| true, /* partial_inplace */ |
| 0xffff, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* A 32 bit absolute relocation. */ |
| HOWTO (R_M32R_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_M32R_32", /* name */ |
| true, /* partial_inplace */ |
| 0xffffffff, /* src_mask */ |
| 0xffffffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* A 24 bit address. */ |
| HOWTO (R_M32R_24, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 24, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_unsigned, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_M32R_24", /* name */ |
| true, /* partial_inplace */ |
| 0xffffff, /* src_mask */ |
| 0xffffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* An PC Relative 10-bit relocation, shifted by 2. |
| This reloc is complicated because relocations are relative to pc & -4. |
| i.e. branches in the right insn slot use the address of the left insn |
| slot for pc. */ |
| /* ??? It's not clear whether this should have partial_inplace set or not. |
| Branch relaxing in the assembler can store the addend in the insn, |
| and if bfd_install_relocation gets called the addend may get added |
| again. */ |
| HOWTO (R_M32R_10_PCREL, /* type */ |
| 2, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 10, /* bitsize */ |
| true, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| m32r_elf_10_pcrel_reloc, /* special_function */ |
| "R_M32R_10_PCREL", /* name */ |
| false, /* partial_inplace */ |
| 0xff, /* src_mask */ |
| 0xff, /* dst_mask */ |
| true), /* pcrel_offset */ |
| |
| /* A relative 18 bit relocation, right shifted by 2. */ |
| HOWTO (R_M32R_18_PCREL, /* 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_M32R_18_PCREL", /* name */ |
| false, /* partial_inplace */ |
| 0xffff, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| true), /* pcrel_offset */ |
| |
| /* A relative 26 bit relocation, right shifted by 2. */ |
| /* ??? It's not clear whether this should have partial_inplace set or not. |
| Branch relaxing in the assembler can store the addend in the insn, |
| and if bfd_install_relocation gets called the addend may get added |
| again. */ |
| HOWTO (R_M32R_26_PCREL, /* type */ |
| 2, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 26, /* bitsize */ |
| true, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_M32R_26_PCREL", /* name */ |
| false, /* partial_inplace */ |
| 0xffffff, /* src_mask */ |
| 0xffffff, /* dst_mask */ |
| true), /* pcrel_offset */ |
| |
| /* High 16 bits of address when lower 16 is or'd in. */ |
| HOWTO (R_M32R_HI16_ULO, /* type */ |
| 16, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| m32r_elf_hi16_reloc, /* special_function */ |
| "R_M32R_HI16_ULO", /* name */ |
| true, /* partial_inplace */ |
| 0x0000ffff, /* src_mask */ |
| 0x0000ffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* High 16 bits of address when lower 16 is added in. */ |
| HOWTO (R_M32R_HI16_SLO, /* type */ |
| 16, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| m32r_elf_hi16_reloc, /* special_function */ |
| "R_M32R_HI16_SLO", /* name */ |
| true, /* partial_inplace */ |
| 0x0000ffff, /* src_mask */ |
| 0x0000ffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* Lower 16 bits of address. */ |
| HOWTO (R_M32R_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 */ |
| m32r_elf_lo16_reloc, /* special_function */ |
| "R_M32R_LO16", /* name */ |
| true, /* partial_inplace */ |
| 0x0000ffff, /* src_mask */ |
| 0x0000ffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* Small data area 16 bits offset. */ |
| HOWTO (R_M32R_SDA16, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| m32r_elf_sda16_reloc, /* special_function */ |
| "R_M32R_SDA16", /* name */ |
| true, /* partial_inplace */ /* FIXME: correct? */ |
| 0x0000ffff, /* src_mask */ |
| 0x0000ffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* GNU extension to record C++ vtable hierarchy */ |
| HOWTO (R_M32R_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_M32R_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_M32R_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_M32R_GNU_VTENTRY", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| }; |
| |
| /* Handle the R_M32R_10_PCREL reloc. */ |
| |
| static bfd_reloc_status_type |
| m32r_elf_10_pcrel_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 ATTRIBUTE_UNUSED; |
| { |
| /* 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_continue; |
| } |
| |
| return m32r_elf_do_10_pcrel_reloc (abfd, reloc_entry->howto, |
| input_section, |
| data, reloc_entry->address, |
| symbol->section, |
| (symbol->value |
| + symbol->section->output_section->vma |
| + symbol->section->output_offset), |
| reloc_entry->addend); |
| } |
| |
| /* Utility to actually perform an R_M32R_10_PCREL reloc. */ |
| |
| static bfd_reloc_status_type |
| m32r_elf_do_10_pcrel_reloc (abfd, howto, input_section, data, offset, |
| symbol_section, symbol_value, addend) |
| bfd *abfd; |
| reloc_howto_type *howto; |
| asection *input_section; |
| bfd_byte *data; |
| bfd_vma offset; |
| asection *symbol_section ATTRIBUTE_UNUSED; |
| bfd_vma symbol_value; |
| bfd_vma addend; |
| { |
| bfd_signed_vma relocation; |
| unsigned long x; |
| bfd_reloc_status_type status; |
| |
| /* Sanity check the address (offset in section). */ |
| if (offset > input_section->_cooked_size) |
| return bfd_reloc_outofrange; |
| |
| relocation = symbol_value + addend; |
| /* Make it pc relative. */ |
| relocation -= (input_section->output_section->vma |
| + input_section->output_offset); |
| /* These jumps mask off the lower two bits of the current address |
| before doing pcrel calculations. */ |
| relocation -= (offset & -4L); |
| |
| if (relocation < -0x200 || relocation > 0x1ff) |
| status = bfd_reloc_overflow; |
| else |
| status = bfd_reloc_ok; |
| |
| x = bfd_get_16 (abfd, data + offset); |
| relocation >>= howto->rightshift; |
| relocation <<= howto->bitpos; |
| x = (x & ~howto->dst_mask) | (((x & howto->src_mask) + relocation) & howto->dst_mask); |
| bfd_put_16 (abfd, x, data + offset); |
| |
| return status; |
| } |
| |
| /* Handle the R_M32R_HI16_[SU]LO relocs. |
| HI16_SLO is for the add3 and load/store with displacement instructions. |
| HI16_ULO is for the or3 instruction. |
| For R_M32R_HI16_SLO, the lower 16 bits are sign extended when added to |
| the high 16 bytes so if the lower 16 bits are negative (bit 15 == 1) then |
| we must add one to the high 16 bytes (which will get subtracted off when |
| the low 16 bits are added). |
| These relocs have to be done in combination with an R_M32R_LO16 reloc |
| because there is a carry from the LO16 to the HI16. Here we just save |
| the information we need; we do the actual relocation when we see the LO16. |
| This code is copied from the elf32-mips.c. We also support an arbitrary |
| number of HI16 relocs to be associated with a single LO16 reloc. The |
| assembler sorts the relocs to ensure each HI16 immediately precedes its |
| LO16. However if there are multiple copies, the assembler may not find |
| the real LO16 so it picks the first one it finds. */ |
| |
| struct m32r_hi16 |
| { |
| struct m32r_hi16 *next; |
| bfd_byte *addr; |
| bfd_vma addend; |
| }; |
| |
| /* FIXME: This should not be a static variable. */ |
| |
| static struct m32r_hi16 *m32r_hi16_list; |
| |
| static bfd_reloc_status_type |
| m32r_elf_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; |
| struct m32r_hi16 *n; |
| |
| /* This part is from bfd_elf_generic_reloc. |
| 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; |
| } |
| |
| /* Sanity check the address (offset in section). */ |
| if (reloc_entry->address > input_section->_cooked_size) |
| return bfd_reloc_outofrange; |
| |
| ret = bfd_reloc_ok; |
| if (bfd_is_und_section (symbol->section) |
| && output_bfd == (bfd *) NULL) |
| ret = bfd_reloc_undefined; |
| |
| 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; |
| |
| /* Save the information, and let LO16 do the actual relocation. */ |
| n = (struct m32r_hi16 *) bfd_malloc (sizeof *n); |
| if (n == NULL) |
| return bfd_reloc_outofrange; |
| n->addr = (bfd_byte *) data + reloc_entry->address; |
| n->addend = relocation; |
| n->next = m32r_hi16_list; |
| m32r_hi16_list = n; |
| |
| if (output_bfd != (bfd *) NULL) |
| reloc_entry->address += input_section->output_offset; |
| |
| return ret; |
| } |
| |
| /* Handle an M32R ELF HI16 reloc. */ |
| |
| static void |
| m32r_elf_relocate_hi16 (input_bfd, type, relhi, rello, contents, addend) |
| bfd *input_bfd; |
| int type; |
| Elf_Internal_Rela *relhi; |
| Elf_Internal_Rela *rello; |
| bfd_byte *contents; |
| bfd_vma addend; |
| { |
| unsigned long insn; |
| bfd_vma addlo; |
| |
| insn = bfd_get_32 (input_bfd, contents + relhi->r_offset); |
| |
| addlo = bfd_get_32 (input_bfd, contents + rello->r_offset); |
| if (type == R_M32R_HI16_SLO) |
| addlo = ((addlo & 0xffff) ^ 0x8000) - 0x8000; |
| else |
| addlo &= 0xffff; |
| |
| addend += ((insn & 0xffff) << 16) + addlo; |
| |
| /* Reaccount for sign extension of low part. */ |
| if (type == R_M32R_HI16_SLO |
| && (addend & 0x8000) != 0) |
| addend += 0x10000; |
| |
| bfd_put_32 (input_bfd, |
| (insn & 0xffff0000) | ((addend >> 16) & 0xffff), |
| contents + relhi->r_offset); |
| } |
| |
| /* Do an R_M32R_LO16 relocation. This is a straightforward 16 bit |
| inplace relocation; this function exists in order to do the |
| R_M32R_HI16_[SU]LO relocation described above. */ |
| |
| bfd_reloc_status_type |
| m32r_elf_lo16_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; |
| { |
| if (m32r_hi16_list != NULL) |
| { |
| struct m32r_hi16 *l; |
| |
| l = m32r_hi16_list; |
| while (l != NULL) |
| { |
| unsigned long insn; |
| unsigned long val; |
| unsigned long vallo; |
| struct m32r_hi16 *next; |
| |
| /* Do the HI16 relocation. Note that we actually don't need |
| to know anything about the LO16 itself, except where to |
| find the low 16 bits of the addend needed by the LO16. */ |
| insn = bfd_get_32 (abfd, l->addr); |
| vallo = ((bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address) |
| & 0xffff) ^ 0x8000) - 0x8000; |
| val = ((insn & 0xffff) << 16) + vallo; |
| val += l->addend; |
| |
| /* Reaccount for sign extension of low part. */ |
| if ((val & 0x8000) != 0) |
| val += 0x10000; |
| |
| insn = (insn &~ 0xffff) | ((val >> 16) & 0xffff); |
| bfd_put_32 (abfd, insn, l->addr); |
| |
| next = l->next; |
| free (l); |
| l = next; |
| } |
| |
| m32r_hi16_list = NULL; |
| } |
| |
| /* Now do the LO16 reloc in the usual way. */ |
| return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
| input_section, output_bfd, error_message); |
| } |
| |
| /* Handle the R_M32R_SDA16 reloc. |
| This reloc is used to compute the address of objects in the small data area |
| and to perform loads and stores from that area. |
| The lower 16 bits are sign extended and added to the register specified |
| in the instruction, which is assumed to point to _SDA_BASE_. */ |
| |
| static bfd_reloc_status_type |
| m32r_elf_sda16_reloc (abfd, reloc_entry, symbol, data, |
| input_section, output_bfd, error_message) |
| bfd *abfd ATTRIBUTE_UNUSED; |
| arelent *reloc_entry; |
| asymbol *symbol; |
| PTR data ATTRIBUTE_UNUSED; |
| asection *input_section; |
| bfd *output_bfd; |
| char **error_message ATTRIBUTE_UNUSED; |
| { |
| /* 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_continue; |
| } |
| |
| /* FIXME: not sure what to do here yet. But then again, the linker |
| may never call us. */ |
| abort (); |
| } |
| |
| /* Map BFD reloc types to M32R ELF reloc types. */ |
| |
| struct m32r_reloc_map |
| { |
| bfd_reloc_code_real_type bfd_reloc_val; |
| unsigned char elf_reloc_val; |
| }; |
| |
| static const struct m32r_reloc_map m32r_reloc_map[] = |
| { |
| { BFD_RELOC_NONE, R_M32R_NONE }, |
| { BFD_RELOC_16, R_M32R_16 }, |
| { BFD_RELOC_32, R_M32R_32 }, |
| { BFD_RELOC_M32R_24, R_M32R_24 }, |
| { BFD_RELOC_M32R_10_PCREL, R_M32R_10_PCREL }, |
| { BFD_RELOC_M32R_18_PCREL, R_M32R_18_PCREL }, |
| { BFD_RELOC_M32R_26_PCREL, R_M32R_26_PCREL }, |
| { BFD_RELOC_M32R_HI16_ULO, R_M32R_HI16_ULO }, |
| { BFD_RELOC_M32R_HI16_SLO, R_M32R_HI16_SLO }, |
| { BFD_RELOC_M32R_LO16, R_M32R_LO16 }, |
| { BFD_RELOC_M32R_SDA16, R_M32R_SDA16 }, |
| { BFD_RELOC_VTABLE_INHERIT, R_M32R_GNU_VTINHERIT }, |
| { BFD_RELOC_VTABLE_ENTRY, R_M32R_GNU_VTENTRY }, |
| }; |
| |
| static reloc_howto_type * |
| bfd_elf32_bfd_reloc_type_lookup (abfd, code) |
| bfd *abfd ATTRIBUTE_UNUSED; |
| bfd_reloc_code_real_type code; |
| { |
| unsigned int i; |
| |
| for (i = 0; |
| i < sizeof (m32r_reloc_map) / sizeof (struct m32r_reloc_map); |
| i++) |
| { |
| if (m32r_reloc_map[i].bfd_reloc_val == code) |
| return &m32r_elf_howto_table[m32r_reloc_map[i].elf_reloc_val]; |
| } |
| |
| return NULL; |
| } |
| |
| /* Set the howto pointer for an M32R ELF reloc. */ |
| |
| static void |
| m32r_info_to_howto_rel (abfd, cache_ptr, dst) |
| bfd *abfd ATTRIBUTE_UNUSED; |
| arelent *cache_ptr; |
| Elf32_Internal_Rel *dst; |
| { |
| unsigned int r_type; |
| |
| r_type = ELF32_R_TYPE (dst->r_info); |
| BFD_ASSERT (r_type < (unsigned int) R_M32R_max); |
| cache_ptr->howto = &m32r_elf_howto_table[r_type]; |
| } |
| |
| /* Given a BFD section, try to locate the corresponding ELF section |
| index. */ |
| |
| boolean |
| _bfd_m32r_elf_section_from_bfd_section (abfd, hdr, sec, retval) |
| bfd *abfd ATTRIBUTE_UNUSED; |
| Elf32_Internal_Shdr *hdr ATTRIBUTE_UNUSED; |
| asection *sec; |
| int *retval; |
| { |
| if (strcmp (bfd_get_section_name (abfd, sec), ".scommon") == 0) |
| { |
| *retval = SHN_M32R_SCOMMON; |
| return true; |
| } |
| return false; |
| } |
| |
| /* M32R ELF uses two common sections. One is the usual one, and the other |
| is for small objects. All the small objects are kept together, and then |
| referenced via one register, which yields faster assembler code. It is |
| up to the compiler to emit an instruction to load the register with |
| _SDA_BASE. This is what we use for the small common section. This |
| approach is copied from elf32-mips.c. */ |
| static asection m32r_elf_scom_section; |
| static asymbol m32r_elf_scom_symbol; |
| static asymbol *m32r_elf_scom_symbol_ptr; |
| |
| /* Handle the special M32R section numbers that a symbol may use. */ |
| |
| void |
| _bfd_m32r_elf_symbol_processing (abfd, asym) |
| bfd *abfd ATTRIBUTE_UNUSED; |
| asymbol *asym; |
| { |
| elf_symbol_type *elfsym; |
| |
| elfsym = (elf_symbol_type *) asym; |
| |
| switch (elfsym->internal_elf_sym.st_shndx) |
| { |
| case SHN_M32R_SCOMMON: |
| if (m32r_elf_scom_section.name == NULL) |
| { |
| /* Initialize the small common section. */ |
| m32r_elf_scom_section.name = ".scommon"; |
| m32r_elf_scom_section.flags = SEC_IS_COMMON; |
| m32r_elf_scom_section.output_section = &m32r_elf_scom_section; |
| m32r_elf_scom_section.symbol = &m32r_elf_scom_symbol; |
| m32r_elf_scom_section.symbol_ptr_ptr = &m32r_elf_scom_symbol_ptr; |
| m32r_elf_scom_symbol.name = ".scommon"; |
| m32r_elf_scom_symbol.flags = BSF_SECTION_SYM; |
| m32r_elf_scom_symbol.section = &m32r_elf_scom_section; |
| m32r_elf_scom_symbol_ptr = &m32r_elf_scom_symbol; |
| } |
| asym->section = &m32r_elf_scom_section; |
| asym->value = elfsym->internal_elf_sym.st_size; |
| break; |
| } |
| } |
| |
| /* Hook called by the linker routine which adds symbols from an object |
| file. We must handle the special M32R section numbers here. |
| We also keep watching for whether we need to create the sdata special |
| linker sections. */ |
| |
| static boolean |
| m32r_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp) |
| bfd *abfd; |
| struct bfd_link_info *info; |
| const Elf_Internal_Sym *sym; |
| const char **namep; |
| flagword *flagsp ATTRIBUTE_UNUSED; |
| asection **secp; |
| bfd_vma *valp; |
| { |
| if (! info->relocateable |
| && (*namep)[0] == '_' && (*namep)[1] == 'S' |
| && strcmp (*namep, "_SDA_BASE_") == 0) |
| { |
| /* This is simpler than using _bfd_elf_create_linker_section |
| (our needs are simpler than ppc's needs). Also |
| _bfd_elf_create_linker_section currently has a bug where if a .sdata |
| section already exists a new one is created that follows it which |
| screws of _SDA_BASE_ address calcs because output_offset != 0. */ |
| struct elf_link_hash_entry *h; |
| asection *s = bfd_get_section_by_name (abfd, ".sdata"); |
| |
| /* The following code was cobbled from elf32-ppc.c and elflink.c. */ |
| |
| if (s == NULL) |
| { |
| int flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS |
| | SEC_IN_MEMORY | SEC_LINKER_CREATED); |
| |
| s = bfd_make_section_anyway (abfd, ".sdata"); |
| if (s == NULL) |
| return false; |
| bfd_set_section_flags (abfd, s, flags); |
| bfd_set_section_alignment (abfd, s, 2); |
| } |
| |
| h = (struct elf_link_hash_entry *) |
| bfd_link_hash_lookup (info->hash, "_SDA_BASE_", false, false, false); |
| |
| if ((h == NULL || h->root.type == bfd_link_hash_undefined) |
| && !(_bfd_generic_link_add_one_symbol (info, |
| abfd, |
| "_SDA_BASE_", |
| BSF_GLOBAL, |
| s, |
| 32768, |
| (const char *) NULL, |
| false, |
| get_elf_backend_data (abfd)->collect, |
| (struct bfd_link_hash_entry **) &h))) |
| return false; |
| h->type = STT_OBJECT; |
| } |
| |
| switch (sym->st_shndx) |
| { |
| case SHN_M32R_SCOMMON: |
| *secp = bfd_make_section_old_way (abfd, ".scommon"); |
| (*secp)->flags |= SEC_IS_COMMON; |
| *valp = sym->st_size; |
| break; |
| } |
| |
| return true; |
| } |
| |
| /* We have to figure out the SDA_BASE value, so that we can adjust the |
| symbol value correctly. We look up the symbol _SDA_BASE_ in the output |
| BFD. If we can't find it, we're stuck. We cache it in the ELF |
| target data. We don't need to adjust the symbol value for an |
| external symbol if we are producing relocateable output. */ |
| |
| static bfd_reloc_status_type |
| m32r_elf_final_sda_base (output_bfd, info, error_message, psb) |
| bfd *output_bfd; |
| struct bfd_link_info *info; |
| const char **error_message; |
| bfd_vma *psb; |
| { |
| if (elf_gp (output_bfd) == 0) |
| { |
| struct bfd_link_hash_entry *h; |
| |
| h = bfd_link_hash_lookup (info->hash, "_SDA_BASE_", false, false, true); |
| if (h != (struct bfd_link_hash_entry *) NULL |
| && h->type == bfd_link_hash_defined) |
| elf_gp (output_bfd) = (h->u.def.value |
| + h->u.def.section->output_section->vma |
| + h->u.def.section->output_offset); |
| else |
| { |
| /* Only get the error once. */ |
| *psb = elf_gp (output_bfd) = 4; |
| *error_message = |
| (const char *) _("SDA relocation when _SDA_BASE_ not defined"); |
| return bfd_reloc_dangerous; |
| } |
| } |
| *psb = elf_gp (output_bfd); |
| return bfd_reloc_ok; |
| } |
| |
| /* Relocate an M32R/D 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 adjust 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 |
| m32r_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 = &elf_tdata (input_bfd)->symtab_hdr; |
| struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd); |
| Elf_Internal_Rela *rel, *relend; |
| /* Assume success. */ |
| boolean ret = true; |
| |
| rel = relocs; |
| relend = relocs + input_section->reloc_count; |
| for (; rel < relend; rel++) |
| { |
| int r_type; |
| reloc_howto_type *howto; |
| unsigned long r_symndx; |
| /* We can't modify r_addend here as elf_link_input_bfd has an assert to |
| ensure it's zero (we use REL relocs, not RELA). Therefore this |
| should be assigning zero to `addend', but for clarity we use |
| `r_addend'. */ |
| bfd_vma addend = rel->r_addend; |
| bfd_vma offset = rel->r_offset; |
| struct elf_link_hash_entry *h; |
| Elf_Internal_Sym *sym; |
| asection *sec; |
| const char *sym_name; |
| bfd_reloc_status_type r; |
| const char *errmsg = NULL; |
| |
| h = NULL; |
| r_type = ELF32_R_TYPE (rel->r_info); |
| if (r_type < 0 || r_type >= (int) R_M32R_max) |
| { |
| (*_bfd_error_handler) (_("%s: unknown relocation type %d"), |
| bfd_get_filename (input_bfd), |
| (int) r_type); |
| bfd_set_error (bfd_error_bad_value); |
| ret = false; |
| continue; |
| } |
| |
| if (r_type == R_M32R_GNU_VTENTRY |
| || r_type == R_M32R_GNU_VTINHERIT) |
| continue; |
| |
| howto = m32r_elf_howto_table + r_type; |
| 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. */ |
| sec = NULL; |
| if (r_symndx >= symtab_hdr->sh_info) |
| { |
| /* External symbol. */ |
| continue; |
| } |
| |
| /* Local symbol. */ |
| sym = local_syms + r_symndx; |
| sym_name = "<local symbol>"; |
| /* STT_SECTION: symbol is associated with a section. */ |
| if (ELF_ST_TYPE (sym->st_info) != STT_SECTION) |
| { |
| /* Symbol isn't associated with a section. Nothing to do. */ |
| continue; |
| } |
| |
| sec = local_sections[r_symndx]; |
| addend += sec->output_offset + sym->st_value; |
| #ifndef USE_REL |
| /* This can't be done for USE_REL because it doesn't mean anything |
| and elf_link_input_bfd asserts this stays zero. */ |
| rel->r_addend = addend; |
| #endif |
| |
| #ifndef USE_REL |
| /* Addends are stored with relocs. We're done. */ |
| continue; |
| #else /* USE_REL */ |
| /* If partial_inplace, we need to store any additional addend |
| back in the section. */ |
| if (! howto->partial_inplace) |
| continue; |
| /* ??? Here is a nice place to call a special_function |
| like handler. */ |
| if (r_type != R_M32R_HI16_SLO && r_type != R_M32R_HI16_ULO) |
| r = _bfd_relocate_contents (howto, input_bfd, |
| addend, contents + offset); |
| else |
| { |
| Elf_Internal_Rela *lorel; |
| |
| /* We allow an arbitrary number of HI16 relocs before the |
| LO16 reloc. This permits gcc to emit the HI and LO relocs |
| itself. */ |
| for (lorel = rel + 1; |
| (lorel < relend |
| && (ELF32_R_TYPE (lorel->r_info) == R_M32R_HI16_SLO |
| || ELF32_R_TYPE (lorel->r_info) == R_M32R_HI16_ULO)); |
| lorel++) |
| continue; |
| if (lorel < relend |
| && ELF32_R_TYPE (lorel->r_info) == R_M32R_LO16) |
| { |
| m32r_elf_relocate_hi16 (input_bfd, r_type, rel, lorel, |
| contents, addend); |
| r = bfd_reloc_ok; |
| } |
| else |
| r = _bfd_relocate_contents (howto, input_bfd, |
| addend, contents + offset); |
| } |
| #endif /* USE_REL */ |
| } |
| else |
| { |
| bfd_vma relocation; |
| |
| /* This is a final link. */ |
| sym = NULL; |
| sec = NULL; |
| |
| if (r_symndx < symtab_hdr->sh_info) |
| { |
| /* Local symbol. */ |
| sym = local_syms + r_symndx; |
| sec = local_sections[r_symndx]; |
| sym_name = "<local symbol>"; |
| relocation = (sec->output_section->vma |
| + sec->output_offset |
| + sym->st_value); |
| } |
| else |
| { |
| /* External symbol. */ |
| 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; |
| sym_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; |
| if (sec->output_section == NULL) |
| relocation = 0; |
| else |
| relocation = (h->root.u.def.value |
| + sec->output_section->vma |
| + sec->output_offset); |
| } |
| else if (h->root.type == bfd_link_hash_undefweak) |
| relocation = 0; |
| else |
| { |
| if (! ((*info->callbacks->undefined_symbol) |
| (info, h->root.root.string, input_bfd, |
| input_section, offset))) |
| return false; |
| relocation = 0; |
| } |
| } |
| |
| /* Sanity check the address. */ |
| if (offset > input_section->_raw_size) |
| { |
| r = bfd_reloc_outofrange; |
| goto check_reloc; |
| } |
| |
| switch ((int) r_type) |
| { |
| case (int) R_M32R_10_PCREL : |
| r = m32r_elf_do_10_pcrel_reloc (input_bfd, howto, input_section, |
| contents, offset, |
| sec, relocation, addend); |
| break; |
| |
| case (int) R_M32R_HI16_SLO : |
| case (int) R_M32R_HI16_ULO : |
| { |
| Elf_Internal_Rela *lorel; |
| |
| /* We allow an arbitrary number of HI16 relocs before the |
| LO16 reloc. This permits gcc to emit the HI and LO relocs |
| itself. */ |
| for (lorel = rel + 1; |
| (lorel < relend |
| && (ELF32_R_TYPE (lorel->r_info) == R_M32R_HI16_SLO |
| || ELF32_R_TYPE (lorel->r_info) == R_M32R_HI16_ULO)); |
| lorel++) |
| continue; |
| if (lorel < relend |
| && ELF32_R_TYPE (lorel->r_info) == R_M32R_LO16) |
| { |
| m32r_elf_relocate_hi16 (input_bfd, r_type, rel, lorel, |
| contents, relocation + addend); |
| r = bfd_reloc_ok; |
| } |
| else |
| r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
| contents, offset, |
| relocation, addend); |
| } |
| break; |
| |
| case (int) R_M32R_SDA16 : |
| { |
| const char *name; |
| |
| BFD_ASSERT (sec != NULL); |
| name = bfd_get_section_name (abfd, sec); |
| |
| if (strcmp (name, ".sdata") == 0 |
| || strcmp (name, ".sbss") == 0 |
| || strcmp (name, ".scommon") == 0) |
| { |
| bfd_vma sda_base; |
| bfd *out_bfd = sec->output_section->owner; |
| |
| r = m32r_elf_final_sda_base (out_bfd, info, |
| &errmsg, |
| &sda_base); |
| if (r != bfd_reloc_ok) |
| { |
| ret = false; |
| goto check_reloc; |
| } |
| |
| /* At this point `relocation' contains the object's |
| address. */ |
| relocation -= sda_base; |
| /* Now it contains the offset from _SDA_BASE_. */ |
| } |
| else |
| { |
| (*_bfd_error_handler) (_("%s: The target (%s) of an %s relocation is in the wrong section (%s)"), |
| bfd_get_filename (input_bfd), |
| sym_name, |
| m32r_elf_howto_table[(int) r_type].name, |
| bfd_get_section_name (abfd, sec)); |
| /*bfd_set_error (bfd_error_bad_value); ??? why? */ |
| ret = false; |
| continue; |
| } |
| } |
| /* fall through */ |
| |
| default : |
| r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
| contents, offset, |
| relocation, addend); |
| break; |
| } |
| } |
| |
| check_reloc: |
| |
| if (r != bfd_reloc_ok) |
| { |
| /* FIXME: This should be generic enough to go in a utility. */ |
| const char *name; |
| |
| if (h != NULL) |
| name = h->root.root.string; |
| else |
| { |
| name = (bfd_elf_string_from_elf_section |
| (input_bfd, symtab_hdr->sh_link, sym->st_name)); |
| if (name == NULL || *name == '\0') |
| name = bfd_section_name (input_bfd, sec); |
| } |
| |
| if (errmsg != NULL) |
| goto common_error; |
| |
| switch (r) |
| { |
| case bfd_reloc_overflow: |
| if (! ((*info->callbacks->reloc_overflow) |
| (info, name, howto->name, (bfd_vma) 0, |
| input_bfd, input_section, offset))) |
| return false; |
| break; |
| |
| case bfd_reloc_undefined: |
| if (! ((*info->callbacks->undefined_symbol) |
| (info, name, input_bfd, input_section, |
| offset))) |
| return false; |
| break; |
| |
| case bfd_reloc_outofrange: |
| errmsg = _("internal error: out of range error"); |
| goto common_error; |
| |
| case bfd_reloc_notsupported: |
| errmsg = _("internal error: unsupported relocation error"); |
| goto common_error; |
| |
| case bfd_reloc_dangerous: |
| errmsg = _("internal error: dangerous error"); |
| goto common_error; |
| |
| default: |
| errmsg = _("internal error: unknown error"); |
| /* fall through */ |
| |
| common_error: |
| if (!((*info->callbacks->warning) |
| (info, errmsg, name, input_bfd, input_section, |
| offset))) |
| return false; |
| break; |
| } |
| } |
| } |
| |
| return ret; |
| } |
| |
| #if 0 /* relaxing not supported yet */ |
| |
| /* This function handles relaxing for the m32r. |
| Relaxing on the m32r is tricky because of instruction alignment |
| requirements (4 byte instructions must be aligned on 4 byte boundaries). |
| |
| The following relaxing opportunities are handled: |
| |
| seth/add3/jl -> bl24 or bl8 |
| seth/add3 -> ld24 |
| |
| It would be nice to handle bl24 -> bl8 but given: |
| |
| - 4 byte insns must be on 4 byte boundaries |
| - branch instructions only branch to insns on 4 byte boundaries |
| |
| this isn't much of a win because the insn in the 2 "deleted" bytes |
| must become a nop. With some complexity some real relaxation could be |
| done but the frequency just wouldn't make it worth it; it's better to |
| try to do all the code compaction one can elsewhere. |
| When the chip supports parallel 16 bit insns, things may change. |
| */ |
| |
| static boolean |
| m32r_elf_relax_section (abfd, sec, link_info, again) |
| bfd *abfd; |
| asection *sec; |
| struct bfd_link_info *link_info; |
| boolean *again; |
| { |
| Elf_Internal_Shdr *symtab_hdr; |
| /* The Rela structures are used here because that's what |
| _bfd_elf32_link_read_relocs uses [for convenience - it sets the addend |
| field to 0]. */ |
| Elf_Internal_Rela *internal_relocs; |
| Elf_Internal_Rela *free_relocs = NULL; |
| Elf_Internal_Rela *irel, *irelend; |
| bfd_byte *contents = NULL; |
| bfd_byte *free_contents = NULL; |
| Elf32_External_Sym *extsyms = NULL; |
| Elf32_External_Sym *free_extsyms = NULL; |
| |
| /* Assume nothing changes. */ |
| *again = false; |
| |
| /* We don't have to do anything for a relocateable link, if |
| this section does not have relocs, or if this is not a |
| code section. */ |
| if (link_info->relocateable |
| || (sec->flags & SEC_RELOC) == 0 |
| || sec->reloc_count == 0 |
| || (sec->flags & SEC_CODE) == 0 |
| || 0 /* FIXME: check SHF_M32R_CAN_RELAX */) |
| return true; |
| |
| /* If this is the first time we have been called for this section, |
| initialize the cooked size. */ |
| if (sec->_cooked_size == 0) |
| sec->_cooked_size = sec->_raw_size; |
| |
| symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| |
| /* Get a copy of the native relocations. */ |
| internal_relocs = (_bfd_elf32_link_read_relocs |
| (abfd, sec, (PTR) NULL, (Elf_Internal_Rela *) NULL, |
| link_info->keep_memory)); |
| if (internal_relocs == NULL) |
| goto error_return; |
| if (! link_info->keep_memory) |
| free_relocs = internal_relocs; |
| |
| /* Walk through them looking for relaxing opportunities. */ |
| irelend = internal_relocs + sec->reloc_count; |
| for (irel = internal_relocs; irel < irelend; irel++) |
| { |
| bfd_vma symval; |
| |
| /* If this isn't something that can be relaxed, then ignore |
| this reloc. */ |
| if (ELF32_R_TYPE (irel->r_info) != (int) R_M32R_HI16_SLO) |
| continue; |
| |
| /* Get the section contents if we haven't done so already. */ |
| if (contents == NULL) |
| { |
| /* Get cached copy if it exists. */ |
| if (elf_section_data (sec)->this_hdr.contents != NULL) |
| contents = elf_section_data (sec)->this_hdr.contents; |
| else |
| { |
| /* Go get them off disk. */ |
| contents = (bfd_byte *) bfd_malloc (sec->_raw_size); |
| if (contents == NULL) |
| goto error_return; |
| free_contents = contents; |
| |
| if (! bfd_get_section_contents (abfd, sec, contents, |
| (file_ptr) 0, sec->_raw_size)) |
| goto error_return; |
| } |
| } |
| |
| /* Read this BFD's symbols if we haven't done so already. */ |
| if (extsyms == NULL) |
| { |
| /* Get cached copy if it exists. */ |
| if (symtab_hdr->contents != NULL) |
| extsyms = (Elf32_External_Sym *) symtab_hdr->contents; |
| else |
| { |
| /* Go get them off disk. */ |
| extsyms = ((Elf32_External_Sym *) |
| bfd_malloc (symtab_hdr->sh_size)); |
| if (extsyms == NULL) |
| goto error_return; |
| free_extsyms = extsyms; |
| if (bfd_seek (abfd, symtab_hdr->sh_offset, SEEK_SET) != 0 |
| || (bfd_read (extsyms, 1, symtab_hdr->sh_size, abfd) |
| != symtab_hdr->sh_size)) |
| goto error_return; |
| } |
| } |
| |
| /* Get the value of the symbol referred to by the reloc. */ |
| if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) |
| { |
| Elf_Internal_Sym isym; |
| asection *sym_sec; |
| |
| /* A local symbol. */ |
| bfd_elf32_swap_symbol_in (abfd, |
| extsyms + ELF32_R_SYM (irel->r_info), |
| &isym); |
| |
| sym_sec = bfd_section_from_elf_index (abfd, isym.st_shndx); |
| symval = (isym.st_value |
| + sym_sec->output_section->vma |
| + sym_sec->output_offset); |
| } |
| else |
| { |
| unsigned long indx; |
| struct elf_link_hash_entry *h; |
| |
| /* An external symbol. */ |
| indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; |
| h = elf_sym_hashes (abfd)[indx]; |
| BFD_ASSERT (h != NULL); |
| if (h->root.type != bfd_link_hash_defined |
| && h->root.type != bfd_link_hash_defweak) |
| { |
| /* This appears to be a reference to an undefined |
| symbol. Just ignore it--it will be caught by the |
| regular reloc processing. */ |
| continue; |
| } |
| |
| symval = (h->root.u.def.value |
| + h->root.u.def.section->output_section->vma |
| + h->root.u.def.section->output_offset); |
| } |
| |
| /* For simplicity of coding, we are going to modify the section |
| contents, the section relocs, and the BFD symbol table. We |
| must tell the rest of the code not to free up this |
| information. It would be possible to instead create a table |
| of changes which have to be made, as is done in coff-mips.c; |
| that would be more work, but would require less memory when |
| the linker is run. */ |
| |
| /* Try to change a seth/add3/jl subroutine call to bl24 or bl8. |
| This sequence is generated by the compiler when compiling in |
| 32 bit mode. Also look for seth/add3 -> ld24. */ |
| |
| if (ELF32_R_TYPE (irel->r_info) == (int) R_M32R_HI16_SLO) |
| { |
| Elf_Internal_Rela *nrel; |
| bfd_vma pc = (sec->output_section->vma + sec->output_offset |
| + irel->r_offset); |
| bfd_signed_vma pcrel_value = symval - pc; |
| unsigned int code,reg; |
| int addend,nop_p,bl8_p,to_delete; |
| |
| /* The tests are ordered so that we get out as quickly as possible |
| if this isn't something we can relax, taking into account that |
| we are looking for two separate possibilities (jl/ld24). */ |
| |
| /* Do nothing if no room in the section for this to be what we're |
| looking for. */ |
| if (irel->r_offset > sec->_cooked_size - 8) |
| continue; |
| |
| /* Make sure the next relocation applies to the next |
| instruction and that it's the add3's reloc. */ |
| nrel = irel + 1; |
| if (nrel == irelend |
| || irel->r_offset + 4 != nrel->r_offset |
| || ELF32_R_TYPE (nrel->r_info) != (int) R_M32R_LO16) |
| continue; |
| |
| /* See if the instructions are seth/add3. */ |
| /* FIXME: This is where macros from cgen can come in. */ |
| code = bfd_get_16 (abfd, contents + irel->r_offset + 0); |
| if ((code & 0xf0ff) != 0xd0c0) |
| continue; /* not seth rN,foo */ |
| reg = (code & 0x0f00) >> 8; |
| code = bfd_get_16 (abfd, contents + irel->r_offset + 4); |
| if (code != (0x80a0 | reg | (reg << 8))) |
| continue; /* not add3 rN,rN,foo */ |
| |
| /* At this point we've confirmed we have seth/add3. Now check |
| whether the next insn is a jl, in which case try to change this |
| to bl24 or bl8. */ |
| |
| /* Ensure the branch target is in range. |
| The bl24 instruction has a 24 bit operand which is the target |
| address right shifted by 2, giving a signed range of 26 bits. |
| Note that 4 bytes are added to the high value because the target |
| will be at least 4 bytes closer if we can relax. It'll actually |
| be 4 or 8 bytes closer, but we don't know which just yet and |
| the difference isn't significant enough to worry about. */ |
| #ifndef USE_REL /* put in for learning purposes */ |
| pcrel_value += irel->r_addend; |
| #else |
| addend = bfd_get_signed_16 (abfd, contents + irel->r_offset + 2); |
| pcrel_value += addend; |
| #endif |
| |
| if (pcrel_value >= -(1 << 25) && pcrel_value < (1 << 25) + 4 |
| /* Do nothing if no room in the section for this to be what we're |
| looking for. */ |
| && (irel->r_offset <= sec->_cooked_size - 12) |
| /* Ensure the next insn is "jl rN". */ |
| && ((code = bfd_get_16 (abfd, contents + irel->r_offset + 8)), |
| code != (0x1ec0 | reg))) |
| { |
| /* We can relax to bl24/bl8. */ |
| |
| /* See if there's a nop following the jl. |
| Also see if we can use a bl8 insn. */ |
| code = bfd_get_16 (abfd, contents + irel->r_offset + 10); |
| nop_p = (code & 0x7fff) == NOP_INSN; |
| bl8_p = pcrel_value >= -0x200 && pcrel_value < 0x200; |
| |
| if (bl8_p) |
| { |
| /* Change "seth rN,foo" to "bl8 foo || nop". |
| We OR in CODE just in case it's not a nop (technically, |
| CODE currently must be a nop, but for cleanness we |
| allow it to be anything). */ |
| #ifndef USE_REL /* put in for learning purposes */ |
| code = 0x7e000000 | MAKE_PARALLEL (code); |
| #else |
| code = (0x7e000000 + (((addend >> 2) & 0xff) << 16)) | MAKE_PARALLEL (code); |
| #endif |
| to_delete = 8; |
| } |
| else |
| { |
| /* Change the seth rN,foo to a bl24 foo. */ |
| #ifndef USE_REL /* put in for learning purposes */ |
| code = 0xfe000000; |
| #else |
| code = 0xfe000000 + ((addend >> 2) & 0xffffff); |
| #endif |
| to_delete = nop_p ? 8 : 4; |
| } |
| |
| bfd_put_32 (abfd, code, contents + irel->r_offset); |
| |
| /* Set the new reloc type. */ |
| irel->r_info = ELF32_R_INFO (ELF32_R_SYM (nrel->r_info), |
| bl8_p ? R_M32R_10_PCREL : R_M32R_26_PCREL); |
| |
| /* Delete the add3 reloc by making it a null reloc. */ |
| nrel->r_info = ELF32_R_INFO (ELF32_R_SYM (nrel->r_info), |
| R_M32R_NONE); |
| } |
| else if (addend >= 0 |
| && symval + addend <= 0xffffff) |
| { |
| /* We can relax to ld24. */ |
| |
| code = 0xe0000000 | (reg << 24) | (addend & 0xffffff); |
| bfd_put_32 (abfd, code, contents + irel->r_offset); |
| to_delete = 4; |
| /* Tell the following code a nop filler isn't needed. */ |
| nop_p = 1; |
| } |
| else |
| { |
| /* Can't do anything here. */ |
| continue; |
| } |
| |
| /* Note that we've changed the relocs, section contents, etc. */ |
| elf_section_data (sec)->relocs = internal_relocs; |
| free_relocs = NULL; |
| |
| elf_section_data (sec)->this_hdr.contents = contents; |
| free_contents = NULL; |
| |
| symtab_hdr->contents = (bfd_byte *) extsyms; |
| free_extsyms = NULL; |
| |
| /* Delete TO_DELETE bytes of data. */ |
| if (!m32r_elf_relax_delete_bytes (abfd, sec, |
| irel->r_offset + 4, to_delete)) |
| goto error_return; |
| |
| /* Now that the following bytes have been moved into place, see if |
| we need to replace the jl with a nop. This happens when we had |
| to use a bl24 insn and the insn following the jl isn't a nop. |
| Technically, this situation can't happen (since the insn can |
| never be executed) but to be clean we do this. When the chip |
| supports parallel 16 bit insns things may change. |
| We don't need to do this in the case of relaxing to ld24, |
| and the above code sets nop_p so this isn't done. */ |
| if (! nop_p && to_delete == 4) |
| bfd_put_16 (abfd, NOP_INSN, contents + irel->r_offset + 4); |
| |
| /* That will change things, so we should relax again. |
| Note that this is not required, and it may be slow. */ |
| *again = true; |
| |
| continue; |
| } |
| |
| /* loop to try the next reloc */ |
| } |
| |
| if (free_relocs != NULL) |
| { |
| free (free_relocs); |
| free_relocs = NULL; |
| } |
| |
| if (free_contents != NULL) |
| { |
| if (! link_info->keep_memory) |
| free (free_contents); |
| else |
| { |
| /* Cache the section contents for elf_link_input_bfd. */ |
| elf_section_data (sec)->this_hdr.contents = contents; |
| } |
| free_contents = NULL; |
| } |
| |
| if (free_extsyms != NULL) |
| { |
| if (! link_info->keep_memory) |
| free (free_extsyms); |
| else |
| { |
| /* Cache the symbols for elf_link_input_bfd. */ |
| symtab_hdr->contents = extsyms; |
| } |
| free_extsyms = NULL; |
| } |
| |
| return true; |
| |
| error_return: |
| if (free_relocs != NULL) |
| free (free_relocs); |
| if (free_contents != NULL) |
| free (free_contents); |
| if (free_extsyms != NULL) |
| free (free_extsyms); |
| return false; |
| } |
| |
| /* Delete some bytes from a section while relaxing. */ |
| |
| static boolean |
| m32r_elf_relax_delete_bytes (abfd, sec, addr, count) |
| bfd *abfd; |
| asection *sec; |
| bfd_vma addr; |
| int count; |
| { |
| Elf_Internal_Shdr *symtab_hdr; |
| Elf32_External_Sym *extsyms; |
| int shndx, index; |
| bfd_byte *contents; |
| Elf_Internal_Rela *irel, *irelend; |
| Elf_Internal_Rela *irelalign; |
| bfd_vma toaddr; |
| Elf32_External_Sym *esym, *esymend; |
| struct elf_link_hash_entry *sym_hash; |
| |
| symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| extsyms = (Elf32_External_Sym *) symtab_hdr->contents; |
| |
| shndx = _bfd_elf_section_from_bfd_section (abfd, sec); |
| |
| contents = elf_section_data (sec)->this_hdr.contents; |
| |
| /* The deletion must stop at the next ALIGN reloc for an aligment |
| power larger than the number of bytes we are deleting. */ |
| |
| irelalign = NULL; |
| toaddr = sec->_cooked_size; |
| |
| irel = elf_section_data (sec)->relocs; |
| irelend = irel + sec->reloc_count; |
| |
| /* Actually delete the bytes. */ |
| memmove (contents + addr, contents + addr + count, toaddr - addr - count); |
| sec->_cooked_size -= count; |
| |
| /* Adjust all the relocs. */ |
| for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++) |
| { |
| /* Get the new reloc address. */ |
| if ((irel->r_offset > addr |
| && irel->r_offset < toaddr)) |
| irel->r_offset -= count; |
| } |
| |
| /* Adjust the local symbols defined in this section. */ |
| esym = extsyms; |
| esymend = esym + symtab_hdr->sh_info; |
| for (; esym < esymend; esym++) |
| { |
| Elf_Internal_Sym isym; |
| |
| bfd_elf32_swap_symbol_in (abfd, esym, &isym); |
| |
| if (isym.st_shndx == shndx |
| && isym.st_value > addr |
| && isym.st_value < toaddr) |
| { |
| isym.st_value -= count; |
| bfd_elf32_swap_symbol_out (abfd, &isym, esym); |
| } |
| } |
| |
| /* Now adjust the global symbols defined in this section. */ |
| esym = extsyms + symtab_hdr->sh_info; |
| esymend = extsyms + (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)); |
| for (index = 0; esym < esymend; esym++, index++) |
| { |
| Elf_Internal_Sym isym; |
| |
| bfd_elf32_swap_symbol_in (abfd, esym, &isym); |
| sym_hash = elf_sym_hashes (abfd)[index]; |
| if (isym.st_shndx == shndx |
| && ((sym_hash)->root.type == bfd_link_hash_defined |
| || (sym_hash)->root.type == bfd_link_hash_defweak) |
| && (sym_hash)->root.u.def.section == sec |
| && (sym_hash)->root.u.def.value > addr |
| && (sym_hash)->root.u.def.value < toaddr) |
| { |
| (sym_hash)->root.u.def.value -= count; |
| } |
| } |
| |
| return true; |
| } |
| |
| /* This is a version of bfd_generic_get_relocated_section_contents |
| which uses m32r_elf_relocate_section. */ |
| |
| static bfd_byte * |
| m32r_elf_get_relocated_section_contents (output_bfd, link_info, link_order, |
| data, relocateable, symbols) |
| bfd *output_bfd; |
| struct bfd_link_info *link_info; |
| struct bfd_link_order *link_order; |
| bfd_byte *data; |
| boolean relocateable; |
| asymbol **symbols; |
| { |
| Elf_Internal_Shdr *symtab_hdr; |
| asection *input_section = link_order->u.indirect.section; |
| bfd *input_bfd = input_section->owner; |
| asection **sections = NULL; |
| Elf_Internal_Rela *internal_relocs = NULL; |
| Elf32_External_Sym *external_syms = NULL; |
| Elf_Internal_Sym *internal_syms = NULL; |
| |
| /* We only need to handle the case of relaxing, or of having a |
| particular set of section contents, specially. */ |
| if (relocateable |
| || elf_section_data (input_section)->this_hdr.contents == NULL) |
| return bfd_generic_get_relocated_section_contents (output_bfd, link_info, |
| link_order, data, |
| relocateable, |
| symbols); |
| |
| symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| |
| memcpy (data, elf_section_data (input_section)->this_hdr.contents, |
| input_section->_raw_size); |
| |
| if ((input_section->flags & SEC_RELOC) != 0 |
| && input_section->reloc_count > 0) |
| { |
| Elf_Internal_Sym *isymp; |
| asection **secpp; |
| Elf32_External_Sym *esym, *esymend; |
| |
| if (symtab_hdr->contents != NULL) |
| external_syms = (Elf32_External_Sym *) symtab_hdr->contents; |
| else |
| { |
| external_syms = ((Elf32_External_Sym *) |
| bfd_malloc (symtab_hdr->sh_info |
| * sizeof (Elf32_External_Sym))); |
| if (external_syms == NULL && symtab_hdr->sh_info > 0) |
| goto error_return; |
| if (bfd_seek (input_bfd, symtab_hdr->sh_offset, SEEK_SET) != 0 |
| || (bfd_read (external_syms, sizeof (Elf32_External_Sym), |
| symtab_hdr->sh_info, input_bfd) |
| != (symtab_hdr->sh_info * sizeof (Elf32_External_Sym)))) |
| goto error_return; |
| } |
| |
| internal_relocs = (_bfd_elf32_link_read_relocs |
| (input_bfd, input_section, (PTR) NULL, |
| (Elf_Internal_Rela *) NULL, false)); |
| if (internal_relocs == NULL) |
| goto error_return; |
| |
| internal_syms = ((Elf_Internal_Sym *) |
| bfd_malloc (symtab_hdr->sh_info |
| * sizeof (Elf_Internal_Sym))); |
| if (internal_syms == NULL && symtab_hdr->sh_info > 0) |
| goto error_return; |
| |
| sections = (asection **) bfd_malloc (symtab_hdr->sh_info |
| * sizeof (asection *)); |
| if (sections == NULL && symtab_hdr->sh_info > 0) |
| goto error_return; |
| |
| isymp = internal_syms; |
| secpp = sections; |
| esym = external_syms; |
| esymend = esym + symtab_hdr->sh_info; |
| for (; esym < esymend; ++esym, ++isymp, ++secpp) |
| { |
| asection *isec; |
| |
| bfd_elf32_swap_symbol_in (input_bfd, esym, isymp); |
| |
| if (isymp->st_shndx == SHN_UNDEF) |
| isec = bfd_und_section_ptr; |
| else if (isymp->st_shndx > 0 && isymp->st_shndx < SHN_LORESERVE) |
| isec = bfd_section_from_elf_index (input_bfd, isymp->st_shndx); |
| else if (isymp->st_shndx == SHN_ABS) |
| isec = bfd_abs_section_ptr; |
| else if (isymp->st_shndx == SHN_COMMON) |
| isec = bfd_com_section_ptr; |
| else if (isymp->st_shndx == SHN_M32R_SCOMMON) |
| isec = &m32r_elf_scom_section; |
| else |
| { |
| /* Who knows? */ |
| isec = NULL; |
| } |
| |
| *secpp = isec; |
| } |
| |
| if (! m32r_elf_relocate_section (output_bfd, link_info, input_bfd, |
| input_section, data, internal_relocs, |
| internal_syms, sections)) |
| goto error_return; |
| |
| if (sections != NULL) |
| free (sections); |
| sections = NULL; |
| if (internal_syms != NULL) |
| free (internal_syms); |
| internal_syms = NULL; |
| if (external_syms != NULL && symtab_hdr->contents == NULL) |
| free (external_syms); |
| external_syms = NULL; |
| if (internal_relocs != elf_section_data (input_section)->relocs) |
| free (internal_relocs); |
| internal_relocs = NULL; |
| } |
| |
| return data; |
| |
| error_return: |
| if (internal_relocs != NULL |
| && internal_relocs != elf_section_data (input_section)->relocs) |
| free (internal_relocs); |
| if (external_syms != NULL && symtab_hdr->contents == NULL) |
| free (external_syms); |
| if (internal_syms != NULL) |
| free (internal_syms); |
| if (sections != NULL) |
| free (sections); |
| return NULL; |
| } |
| |
| #endif /* #if 0 */ |
| |
| /* Set the right machine number. */ |
| static boolean |
| m32r_elf_object_p (abfd) |
| bfd *abfd; |
| { |
| switch (elf_elfheader (abfd)->e_flags & EF_M32R_ARCH) |
| { |
| default: |
| case E_M32R_ARCH: (void) bfd_default_set_arch_mach (abfd, bfd_arch_m32r, bfd_mach_m32r); break; |
| case E_M32RX_ARCH: (void) bfd_default_set_arch_mach (abfd, bfd_arch_m32r, bfd_mach_m32rx); break; |
| } |
| return true; |
| } |
| |
| /* Store the machine number in the flags field. */ |
| static void |
| m32r_elf_final_write_processing (abfd, linker) |
| bfd * abfd; |
| boolean linker ATTRIBUTE_UNUSED; |
| { |
| unsigned long val; |
| |
| switch (bfd_get_mach (abfd)) |
| { |
| default: |
| case bfd_mach_m32r: val = E_M32R_ARCH; break; |
| case bfd_mach_m32rx: val = E_M32RX_ARCH; break; |
| } |
| |
| elf_elfheader (abfd)->e_flags &=~ EF_M32R_ARCH; |
| elf_elfheader (abfd)->e_flags |= val; |
| } |
| |
| /* Function to keep M32R specific file flags. */ |
| static boolean |
| m32r_elf_set_private_flags (abfd, flags) |
| bfd * abfd; |
| flagword flags; |
| { |
| BFD_ASSERT (!elf_flags_init (abfd) |
| || elf_elfheader (abfd)->e_flags == 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 boolean |
| m32r_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_gp (obfd) = elf_gp (ibfd); |
| 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 boolean |
| m32r_elf_merge_private_bfd_data (ibfd, obfd) |
| bfd * ibfd; |
| bfd * obfd; |
| { |
| flagword out_flags; |
| flagword in_flags; |
| |
| if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour |
| || bfd_get_flavour (obfd) != bfd_target_elf_flavour) |
| return true; |
| |
| in_flags = elf_elfheader (ibfd)->e_flags; |
| out_flags = elf_elfheader (obfd)->e_flags; |
| |
| if (! elf_flags_init (obfd)) |
| { |
| /* If the input is the default architecture then do not |
| bother setting the flags for the output architecture, |
| instead allow future merges to do this. If no future |
| merges ever set these flags then they will retain their |
| unitialised values, which surprise surprise, correspond |
| to the default values. */ |
| if (bfd_get_arch_info (ibfd)->the_default) |
| return true; |
| |
| elf_flags_init (obfd) = true; |
| elf_elfheader (obfd)->e_flags = in_flags; |
| |
| if (bfd_get_arch (obfd) == bfd_get_arch (ibfd) |
| && bfd_get_arch_info (obfd)->the_default) |
| { |
| return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd)); |
| } |
| |
| return true; |
| } |
| |
| /* Check flag compatibility. */ |
| if (in_flags == out_flags) |
| return true; |
| |
| if ((in_flags & EF_M32R_ARCH) != (out_flags & EF_M32R_ARCH)) |
| { |
| if ((in_flags & EF_M32R_ARCH) != E_M32R_ARCH) |
| { |
| _bfd_error_handler (_("%s: Instruction set mismatch with previous modules"), |
| bfd_get_filename (ibfd)); |
| |
| bfd_set_error (bfd_error_bad_value); |
| return false; |
| } |
| } |
| |
| return true; |
| } |
| |
| /* Display the flags field */ |
| static boolean |
| m32r_elf_print_private_bfd_data (abfd, ptr) |
| bfd * abfd; |
| PTR ptr; |
| { |
| FILE * file = (FILE *) ptr; |
| |
| BFD_ASSERT (abfd != NULL && ptr != NULL) |
| |
| _bfd_elf_print_private_bfd_data (abfd, ptr); |
| |
| fprintf (file, _("private flags = %lx"), elf_elfheader (abfd)->e_flags); |
| |
| switch (elf_elfheader (abfd)->e_flags & EF_M32R_ARCH) |
| { |
| default: |
| case E_M32R_ARCH: fprintf (file, _(": m32r instructions")); break; |
| case E_M32RX_ARCH: fprintf (file, _(": m32rx instructions")); break; |
| } |
| |
| fputc ('\n', file); |
| |
| return true; |
| } |
| |
| asection * |
| m32r_elf_gc_mark_hook (abfd, info, rel, h, sym) |
| bfd *abfd; |
| 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_M32R_GNU_VTINHERIT: |
| case R_M32R_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 |
| { |
| 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; |
| } |
| |
| static boolean |
| m32r_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; |
| { |
| /* we don't use got and plt entries for m32r */ |
| 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 |
| m32r_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_M32R_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_M32R_GNU_VTENTRY: |
| if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_offset)) |
| return false; |
| break; |
| } |
| } |
| |
| return true; |
| } |
| |
| |
| |
| |
| #define ELF_ARCH bfd_arch_m32r |
| #define ELF_MACHINE_CODE EM_CYGNUS_M32R |
| #define ELF_MAXPAGESIZE 0x1 /* Explicitly requested by Mitsubishi. */ |
| |
| #define TARGET_BIG_SYM bfd_elf32_m32r_vec |
| #define TARGET_BIG_NAME "elf32-m32r" |
| |
| #define elf_info_to_howto 0 |
| #define elf_info_to_howto_rel m32r_info_to_howto_rel |
| #define elf_backend_section_from_bfd_section _bfd_m32r_elf_section_from_bfd_section |
| #define elf_backend_symbol_processing _bfd_m32r_elf_symbol_processing |
| #define elf_backend_add_symbol_hook m32r_elf_add_symbol_hook |
| #define elf_backend_relocate_section m32r_elf_relocate_section |
| #define elf_backend_gc_mark_hook m32r_elf_gc_mark_hook |
| #define elf_backend_gc_sweep_hook m32r_elf_gc_sweep_hook |
| #define elf_backend_check_relocs m32r_elf_check_relocs |
| |
| #define elf_backend_can_gc_sections 1 |
| #if 0 /* not yet */ |
| /* relax support */ |
| #define bfd_elf32_bfd_relax_section m32r_elf_relax_section |
| #define bfd_elf32_bfd_get_relocated_section_contents \ |
| m32r_elf_get_relocated_section_contents |
| #endif |
| |
| #define elf_backend_object_p m32r_elf_object_p |
| #define elf_backend_final_write_processing m32r_elf_final_write_processing |
| #define bfd_elf32_bfd_copy_private_bfd_data m32r_elf_copy_private_bfd_data |
| #define bfd_elf32_bfd_merge_private_bfd_data m32r_elf_merge_private_bfd_data |
| #define bfd_elf32_bfd_set_private_flags m32r_elf_set_private_flags |
| #define bfd_elf32_bfd_print_private_bfd_data m32r_elf_print_private_bfd_data |
| |
| #include "elf32-target.h" |