| /* BFD back-end for Renesas Super-H COFF binaries. |
| Copyright (C) 1993-2024 Free Software Foundation, Inc. |
| Contributed by Cygnus Support. |
| Written by Steve Chamberlain, <sac@cygnus.com>. |
| Relaxing code written by Ian Lance Taylor, <ian@cygnus.com>. |
| |
| 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 "libiberty.h" |
| #include "libbfd.h" |
| #include "bfdlink.h" |
| #include "coff/sh.h" |
| #include "coff/internal.h" |
| |
| #undef bfd_pe_print_pdata |
| |
| #ifdef COFF_WITH_PE |
| #include "coff/pe.h" |
| |
| #ifndef COFF_IMAGE_WITH_PE |
| static bool sh_align_load_span |
| (bfd *, asection *, bfd_byte *, |
| bool (*) (bfd *, asection *, void *, bfd_byte *, bfd_vma), |
| void *, bfd_vma **, bfd_vma *, bfd_vma, bfd_vma, bool *); |
| |
| #define _bfd_sh_align_load_span sh_align_load_span |
| #endif |
| |
| #define bfd_pe_print_pdata _bfd_pe_print_ce_compressed_pdata |
| |
| #else |
| |
| #define bfd_pe_print_pdata NULL |
| |
| #endif /* COFF_WITH_PE. */ |
| |
| #include "libcoff.h" |
| |
| /* Internal functions. */ |
| |
| #ifdef COFF_WITH_PE |
| /* Can't build import tables with 2**4 alignment. */ |
| #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER 2 |
| #else |
| /* Default section alignment to 2**4. */ |
| #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER 4 |
| #endif |
| |
| #ifdef COFF_IMAGE_WITH_PE |
| /* Align PE executables. */ |
| #define COFF_PAGE_SIZE 0x1000 |
| #endif |
| |
| /* Generate long file names. */ |
| #define COFF_LONG_FILENAMES |
| |
| #ifdef COFF_WITH_PE |
| /* Return TRUE if this relocation should |
| appear in the output .reloc section. */ |
| |
| static bool |
| in_reloc_p (bfd * abfd ATTRIBUTE_UNUSED, |
| reloc_howto_type * howto) |
| { |
| return ! howto->pc_relative && howto->type != R_SH_IMAGEBASE; |
| } |
| #endif |
| |
| static bfd_reloc_status_type |
| sh_reloc (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| static bool |
| sh_relocate_section (bfd *, struct bfd_link_info *, bfd *, asection *, |
| bfd_byte *, struct internal_reloc *, |
| struct internal_syment *, asection **); |
| static bool |
| sh_align_loads (bfd *, asection *, struct internal_reloc *, |
| bfd_byte *, bool *); |
| |
| /* The supported relocations. There are a lot of relocations defined |
| in coff/internal.h which we do not expect to ever see. */ |
| static reloc_howto_type sh_coff_howtos[] = |
| { |
| EMPTY_HOWTO (0), |
| EMPTY_HOWTO (1), |
| #ifdef COFF_WITH_PE |
| /* Windows CE */ |
| HOWTO (R_SH_IMM32CE, /* type */ |
| 0, /* rightshift */ |
| 4, /* size */ |
| 32, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| sh_reloc, /* special_function */ |
| "r_imm32ce", /* name */ |
| true, /* partial_inplace */ |
| 0xffffffff, /* src_mask */ |
| 0xffffffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| #else |
| EMPTY_HOWTO (2), |
| #endif |
| EMPTY_HOWTO (3), /* R_SH_PCREL8 */ |
| EMPTY_HOWTO (4), /* R_SH_PCREL16 */ |
| EMPTY_HOWTO (5), /* R_SH_HIGH8 */ |
| EMPTY_HOWTO (6), /* R_SH_IMM24 */ |
| EMPTY_HOWTO (7), /* R_SH_LOW16 */ |
| EMPTY_HOWTO (8), |
| EMPTY_HOWTO (9), /* R_SH_PCDISP8BY4 */ |
| |
| HOWTO (R_SH_PCDISP8BY2, /* type */ |
| 1, /* rightshift */ |
| 2, /* size */ |
| 8, /* bitsize */ |
| true, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| sh_reloc, /* special_function */ |
| "r_pcdisp8by2", /* name */ |
| true, /* partial_inplace */ |
| 0xff, /* src_mask */ |
| 0xff, /* dst_mask */ |
| true), /* pcrel_offset */ |
| |
| EMPTY_HOWTO (11), /* R_SH_PCDISP8 */ |
| |
| HOWTO (R_SH_PCDISP, /* type */ |
| 1, /* rightshift */ |
| 2, /* size */ |
| 12, /* bitsize */ |
| true, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| sh_reloc, /* special_function */ |
| "r_pcdisp12by2", /* name */ |
| true, /* partial_inplace */ |
| 0xfff, /* src_mask */ |
| 0xfff, /* dst_mask */ |
| true), /* pcrel_offset */ |
| |
| EMPTY_HOWTO (13), |
| |
| HOWTO (R_SH_IMM32, /* type */ |
| 0, /* rightshift */ |
| 4, /* size */ |
| 32, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| sh_reloc, /* special_function */ |
| "r_imm32", /* name */ |
| true, /* partial_inplace */ |
| 0xffffffff, /* src_mask */ |
| 0xffffffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| EMPTY_HOWTO (15), |
| #ifdef COFF_WITH_PE |
| HOWTO (R_SH_IMAGEBASE, /* type */ |
| 0, /* rightshift */ |
| 4, /* size */ |
| 32, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| sh_reloc, /* special_function */ |
| "rva32", /* name */ |
| true, /* partial_inplace */ |
| 0xffffffff, /* src_mask */ |
| 0xffffffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| #else |
| EMPTY_HOWTO (16), /* R_SH_IMM8 */ |
| #endif |
| EMPTY_HOWTO (17), /* R_SH_IMM8BY2 */ |
| EMPTY_HOWTO (18), /* R_SH_IMM8BY4 */ |
| EMPTY_HOWTO (19), /* R_SH_IMM4 */ |
| EMPTY_HOWTO (20), /* R_SH_IMM4BY2 */ |
| EMPTY_HOWTO (21), /* R_SH_IMM4BY4 */ |
| |
| HOWTO (R_SH_PCRELIMM8BY2, /* type */ |
| 1, /* rightshift */ |
| 2, /* size */ |
| 8, /* bitsize */ |
| true, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_unsigned, /* complain_on_overflow */ |
| sh_reloc, /* special_function */ |
| "r_pcrelimm8by2", /* name */ |
| true, /* partial_inplace */ |
| 0xff, /* src_mask */ |
| 0xff, /* dst_mask */ |
| true), /* pcrel_offset */ |
| |
| HOWTO (R_SH_PCRELIMM8BY4, /* type */ |
| 2, /* rightshift */ |
| 2, /* size */ |
| 8, /* bitsize */ |
| true, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_unsigned, /* complain_on_overflow */ |
| sh_reloc, /* special_function */ |
| "r_pcrelimm8by4", /* name */ |
| true, /* partial_inplace */ |
| 0xff, /* src_mask */ |
| 0xff, /* dst_mask */ |
| true), /* pcrel_offset */ |
| |
| HOWTO (R_SH_IMM16, /* type */ |
| 0, /* rightshift */ |
| 2, /* size */ |
| 16, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| sh_reloc, /* special_function */ |
| "r_imm16", /* name */ |
| true, /* partial_inplace */ |
| 0xffff, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| HOWTO (R_SH_SWITCH16, /* type */ |
| 0, /* rightshift */ |
| 2, /* size */ |
| 16, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| sh_reloc, /* special_function */ |
| "r_switch16", /* name */ |
| true, /* partial_inplace */ |
| 0xffff, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| HOWTO (R_SH_SWITCH32, /* type */ |
| 0, /* rightshift */ |
| 4, /* size */ |
| 32, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| sh_reloc, /* special_function */ |
| "r_switch32", /* name */ |
| true, /* partial_inplace */ |
| 0xffffffff, /* src_mask */ |
| 0xffffffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| HOWTO (R_SH_USES, /* type */ |
| 0, /* rightshift */ |
| 2, /* size */ |
| 16, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| sh_reloc, /* special_function */ |
| "r_uses", /* name */ |
| true, /* partial_inplace */ |
| 0xffff, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| HOWTO (R_SH_COUNT, /* type */ |
| 0, /* rightshift */ |
| 4, /* size */ |
| 32, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| sh_reloc, /* special_function */ |
| "r_count", /* name */ |
| true, /* partial_inplace */ |
| 0xffffffff, /* src_mask */ |
| 0xffffffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| HOWTO (R_SH_ALIGN, /* type */ |
| 0, /* rightshift */ |
| 4, /* size */ |
| 32, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| sh_reloc, /* special_function */ |
| "r_align", /* name */ |
| true, /* partial_inplace */ |
| 0xffffffff, /* src_mask */ |
| 0xffffffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| HOWTO (R_SH_CODE, /* type */ |
| 0, /* rightshift */ |
| 4, /* size */ |
| 32, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| sh_reloc, /* special_function */ |
| "r_code", /* name */ |
| true, /* partial_inplace */ |
| 0xffffffff, /* src_mask */ |
| 0xffffffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| HOWTO (R_SH_DATA, /* type */ |
| 0, /* rightshift */ |
| 4, /* size */ |
| 32, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| sh_reloc, /* special_function */ |
| "r_data", /* name */ |
| true, /* partial_inplace */ |
| 0xffffffff, /* src_mask */ |
| 0xffffffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| HOWTO (R_SH_LABEL, /* type */ |
| 0, /* rightshift */ |
| 4, /* size */ |
| 32, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| sh_reloc, /* special_function */ |
| "r_label", /* name */ |
| true, /* partial_inplace */ |
| 0xffffffff, /* src_mask */ |
| 0xffffffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| HOWTO (R_SH_SWITCH8, /* type */ |
| 0, /* rightshift */ |
| 1, /* size */ |
| 8, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| sh_reloc, /* special_function */ |
| "r_switch8", /* name */ |
| true, /* partial_inplace */ |
| 0xff, /* src_mask */ |
| 0xff, /* dst_mask */ |
| false) /* pcrel_offset */ |
| }; |
| |
| #define SH_COFF_HOWTO_COUNT (sizeof sh_coff_howtos / sizeof sh_coff_howtos[0]) |
| |
| /* Check for a bad magic number. */ |
| #define BADMAG(x) SHBADMAG(x) |
| |
| /* Customize coffcode.h (this is not currently used). */ |
| #define SH 1 |
| |
| /* FIXME: This should not be set here. */ |
| #define __A_MAGIC_SET__ |
| |
| #ifndef COFF_WITH_PE |
| /* Swap the r_offset field in and out. */ |
| #define SWAP_IN_RELOC_OFFSET H_GET_32 |
| #define SWAP_OUT_RELOC_OFFSET H_PUT_32 |
| |
| /* Swap out extra information in the reloc structure. */ |
| #define SWAP_OUT_RELOC_EXTRA(abfd, src, dst) \ |
| do \ |
| { \ |
| dst->r_stuff[0] = 'S'; \ |
| dst->r_stuff[1] = 'C'; \ |
| } \ |
| while (0) |
| #endif |
| |
| /* Get the value of a symbol, when performing a relocation. */ |
| |
| static long |
| get_symbol_value (asymbol *symbol) |
| { |
| bfd_vma relocation; |
| |
| if (bfd_is_com_section (symbol->section)) |
| relocation = 0; |
| else |
| relocation = (symbol->value + |
| symbol->section->output_section->vma + |
| symbol->section->output_offset); |
| |
| return relocation; |
| } |
| |
| #ifdef COFF_WITH_PE |
| /* Convert an rtype to howto for the COFF backend linker. |
| Copied from coff-i386. */ |
| #define coff_rtype_to_howto coff_sh_rtype_to_howto |
| |
| |
| static reloc_howto_type * |
| coff_sh_rtype_to_howto (bfd * abfd ATTRIBUTE_UNUSED, |
| asection * sec, |
| struct internal_reloc * rel, |
| struct coff_link_hash_entry * h, |
| struct internal_syment * sym, |
| bfd_vma * addendp) |
| { |
| reloc_howto_type * howto; |
| |
| howto = sh_coff_howtos + rel->r_type; |
| |
| *addendp = 0; |
| |
| if (howto->pc_relative) |
| *addendp += sec->vma; |
| |
| if (sym != NULL && sym->n_scnum == 0 && sym->n_value != 0) |
| { |
| /* This is a common symbol. The section contents include the |
| size (sym->n_value) as an addend. The relocate_section |
| function will be adding in the final value of the symbol. We |
| need to subtract out the current size in order to get the |
| correct result. */ |
| BFD_ASSERT (h != NULL); |
| } |
| |
| if (howto->pc_relative) |
| { |
| *addendp -= 4; |
| |
| /* If the symbol is defined, then the generic code is going to |
| add back the symbol value in order to cancel out an |
| adjustment it made to the addend. However, we set the addend |
| to 0 at the start of this function. We need to adjust here, |
| to avoid the adjustment the generic code will make. FIXME: |
| This is getting a bit hackish. */ |
| if (sym != NULL && sym->n_scnum != 0) |
| *addendp -= sym->n_value; |
| } |
| |
| if (rel->r_type == R_SH_IMAGEBASE) |
| *addendp -= pe_data (sec->output_section->owner)->pe_opthdr.ImageBase; |
| |
| return howto; |
| } |
| |
| #endif /* COFF_WITH_PE */ |
| |
| /* This structure is used to map BFD reloc codes to SH PE relocs. */ |
| struct shcoff_reloc_map |
| { |
| bfd_reloc_code_real_type bfd_reloc_val; |
| unsigned char shcoff_reloc_val; |
| }; |
| |
| #ifdef COFF_WITH_PE |
| /* An array mapping BFD reloc codes to SH PE relocs. */ |
| static const struct shcoff_reloc_map sh_reloc_map[] = |
| { |
| { BFD_RELOC_32, R_SH_IMM32CE }, |
| { BFD_RELOC_RVA, R_SH_IMAGEBASE }, |
| { BFD_RELOC_CTOR, R_SH_IMM32CE }, |
| }; |
| #else |
| /* An array mapping BFD reloc codes to SH PE relocs. */ |
| static const struct shcoff_reloc_map sh_reloc_map[] = |
| { |
| { BFD_RELOC_32, R_SH_IMM32 }, |
| { BFD_RELOC_CTOR, R_SH_IMM32 }, |
| }; |
| #endif |
| |
| /* Given a BFD reloc code, return the howto structure for the |
| corresponding SH PE reloc. */ |
| #define coff_bfd_reloc_type_lookup sh_coff_reloc_type_lookup |
| #define coff_bfd_reloc_name_lookup sh_coff_reloc_name_lookup |
| |
| static reloc_howto_type * |
| sh_coff_reloc_type_lookup (bfd *abfd, |
| bfd_reloc_code_real_type code) |
| { |
| unsigned int i; |
| |
| for (i = ARRAY_SIZE (sh_reloc_map); i--;) |
| if (sh_reloc_map[i].bfd_reloc_val == code) |
| return &sh_coff_howtos[(int) sh_reloc_map[i].shcoff_reloc_val]; |
| |
| _bfd_error_handler (_("%pB: unsupported relocation type %#x"), |
| abfd, (unsigned int) code); |
| return NULL; |
| } |
| |
| static reloc_howto_type * |
| sh_coff_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| const char *r_name) |
| { |
| unsigned int i; |
| |
| for (i = 0; i < sizeof (sh_coff_howtos) / sizeof (sh_coff_howtos[0]); i++) |
| if (sh_coff_howtos[i].name != NULL |
| && strcasecmp (sh_coff_howtos[i].name, r_name) == 0) |
| return &sh_coff_howtos[i]; |
| |
| return NULL; |
| } |
| |
| /* This macro is used in coffcode.h to get the howto corresponding to |
| an internal reloc. */ |
| |
| #define RTYPE2HOWTO(relent, internal) \ |
| ((relent)->howto = \ |
| ((internal)->r_type < SH_COFF_HOWTO_COUNT \ |
| ? &sh_coff_howtos[(internal)->r_type] \ |
| : (reloc_howto_type *) NULL)) |
| |
| /* This is the same as the macro in coffcode.h, except that it copies |
| r_offset into reloc_entry->addend for some relocs. */ |
| #define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \ |
| { \ |
| coff_symbol_type *coffsym = (coff_symbol_type *) NULL; \ |
| if (ptr && bfd_asymbol_bfd (ptr) != abfd) \ |
| coffsym = (obj_symbols (abfd) \ |
| + (cache_ptr->sym_ptr_ptr - symbols)); \ |
| else if (ptr) \ |
| coffsym = coff_symbol_from (ptr); \ |
| if (coffsym != (coff_symbol_type *) NULL \ |
| && coffsym->native->u.syment.n_scnum == 0) \ |
| cache_ptr->addend = 0; \ |
| else if (ptr && bfd_asymbol_bfd (ptr) == abfd \ |
| && ptr->section != (asection *) NULL) \ |
| cache_ptr->addend = - (ptr->section->vma \ |
| + COFF_PE_ADDEND_BIAS (ptr)); \ |
| else \ |
| cache_ptr->addend = 0; \ |
| if ((reloc).r_type == R_SH_SWITCH8 \ |
| || (reloc).r_type == R_SH_SWITCH16 \ |
| || (reloc).r_type == R_SH_SWITCH32 \ |
| || (reloc).r_type == R_SH_USES \ |
| || (reloc).r_type == R_SH_COUNT \ |
| || (reloc).r_type == R_SH_ALIGN) \ |
| cache_ptr->addend = (reloc).r_offset; \ |
| } |
| |
| /* This is the howto function for the SH relocations. */ |
| |
| static bfd_reloc_status_type |
| sh_reloc (bfd * abfd, |
| arelent * reloc_entry, |
| asymbol * symbol_in, |
| void * data, |
| asection * input_section, |
| bfd * output_bfd, |
| char ** error_message ATTRIBUTE_UNUSED) |
| { |
| bfd_vma insn; |
| bfd_vma sym_value; |
| unsigned short r_type; |
| bfd_vma addr = reloc_entry->address; |
| bfd_byte *hit_data = addr + (bfd_byte *) data; |
| |
| r_type = reloc_entry->howto->type; |
| |
| if (output_bfd != NULL) |
| { |
| /* Partial linking--do nothing. */ |
| reloc_entry->address += input_section->output_offset; |
| return bfd_reloc_ok; |
| } |
| |
| /* Almost all relocs have to do with relaxing. If any work must be |
| done for them, it has been done in sh_relax_section. */ |
| if (r_type != R_SH_IMM32 |
| #ifdef COFF_WITH_PE |
| && r_type != R_SH_IMM32CE |
| && r_type != R_SH_IMAGEBASE |
| #endif |
| && (r_type != R_SH_PCDISP |
| || (symbol_in->flags & BSF_LOCAL) != 0)) |
| return bfd_reloc_ok; |
| |
| if (symbol_in != NULL |
| && bfd_is_und_section (symbol_in->section)) |
| return bfd_reloc_undefined; |
| |
| if (!bfd_reloc_offset_in_range (reloc_entry->howto, abfd, input_section, |
| addr)) |
| return bfd_reloc_outofrange; |
| |
| sym_value = get_symbol_value (symbol_in); |
| |
| switch (r_type) |
| { |
| case R_SH_IMM32: |
| #ifdef COFF_WITH_PE |
| case R_SH_IMM32CE: |
| #endif |
| insn = bfd_get_32 (abfd, hit_data); |
| insn += sym_value + reloc_entry->addend; |
| bfd_put_32 (abfd, insn, hit_data); |
| break; |
| #ifdef COFF_WITH_PE |
| case R_SH_IMAGEBASE: |
| insn = bfd_get_32 (abfd, hit_data); |
| insn += sym_value + reloc_entry->addend; |
| insn -= pe_data (input_section->output_section->owner)->pe_opthdr.ImageBase; |
| bfd_put_32 (abfd, insn, hit_data); |
| break; |
| #endif |
| case R_SH_PCDISP: |
| insn = bfd_get_16 (abfd, hit_data); |
| sym_value += reloc_entry->addend; |
| sym_value -= (input_section->output_section->vma |
| + input_section->output_offset |
| + addr |
| + 4); |
| sym_value += (((insn & 0xfff) ^ 0x800) - 0x800) << 1; |
| insn = (insn & 0xf000) | ((sym_value >> 1) & 0xfff); |
| bfd_put_16 (abfd, insn, hit_data); |
| if (sym_value + 0x1000 >= 0x2000 || (sym_value & 1) != 0) |
| return bfd_reloc_overflow; |
| break; |
| default: |
| abort (); |
| break; |
| } |
| |
| return bfd_reloc_ok; |
| } |
| |
| #define coff_bfd_merge_private_bfd_data _bfd_generic_verify_endian_match |
| |
| /* We can do relaxing. */ |
| #define coff_bfd_relax_section sh_relax_section |
| |
| /* We use the special COFF backend linker. */ |
| #define coff_relocate_section sh_relocate_section |
| |
| /* When relaxing, we need to use special code to get the relocated |
| section contents. */ |
| #define coff_bfd_get_relocated_section_contents \ |
| sh_coff_get_relocated_section_contents |
| |
| #include "coffcode.h" |
| |
| static bool |
| sh_relax_delete_bytes (bfd *, asection *, bfd_vma, int); |
| |
| /* This function handles relaxing on the SH. |
| |
| Function calls on the SH look like this: |
| |
| movl L1,r0 |
| ... |
| jsr @r0 |
| ... |
| L1: |
| .long function |
| |
| The compiler and assembler will cooperate to create R_SH_USES |
| relocs on the jsr instructions. The r_offset field of the |
| R_SH_USES reloc is the PC relative offset to the instruction which |
| loads the register (the r_offset field is computed as though it |
| were a jump instruction, so the offset value is actually from four |
| bytes past the instruction). The linker can use this reloc to |
| determine just which function is being called, and thus decide |
| whether it is possible to replace the jsr with a bsr. |
| |
| If multiple function calls are all based on a single register load |
| (i.e., the same function is called multiple times), the compiler |
| guarantees that each function call will have an R_SH_USES reloc. |
| Therefore, if the linker is able to convert each R_SH_USES reloc |
| which refers to that address, it can safely eliminate the register |
| load. |
| |
| When the assembler creates an R_SH_USES reloc, it examines it to |
| determine which address is being loaded (L1 in the above example). |
| It then counts the number of references to that address, and |
| creates an R_SH_COUNT reloc at that address. The r_offset field of |
| the R_SH_COUNT reloc will be the number of references. If the |
| linker is able to eliminate a register load, it can use the |
| R_SH_COUNT reloc to see whether it can also eliminate the function |
| address. |
| |
| SH relaxing also handles another, unrelated, matter. On the SH, if |
| a load or store instruction is not aligned on a four byte boundary, |
| the memory cycle interferes with the 32 bit instruction fetch, |
| causing a one cycle bubble in the pipeline. Therefore, we try to |
| align load and store instructions on four byte boundaries if we |
| can, by swapping them with one of the adjacent instructions. */ |
| |
| static bool |
| sh_relax_section (bfd *abfd, |
| asection *sec, |
| struct bfd_link_info *link_info, |
| bool *again) |
| { |
| struct internal_reloc *internal_relocs; |
| bool have_code; |
| struct internal_reloc *irel, *irelend; |
| bfd_byte *contents = NULL; |
| |
| *again = false; |
| |
| if (bfd_link_relocatable (link_info) |
| || (sec->flags & SEC_HAS_CONTENTS) == 0 |
| || (sec->flags & SEC_RELOC) == 0 |
| || sec->reloc_count == 0) |
| return true; |
| |
| if (coff_section_data (abfd, sec) == NULL) |
| { |
| size_t amt = sizeof (struct coff_section_tdata); |
| sec->used_by_bfd = bfd_zalloc (abfd, amt); |
| if (sec->used_by_bfd == NULL) |
| return false; |
| } |
| |
| internal_relocs = (_bfd_coff_read_internal_relocs |
| (abfd, sec, link_info->keep_memory, |
| (bfd_byte *) NULL, false, |
| (struct internal_reloc *) NULL)); |
| if (internal_relocs == NULL) |
| goto error_return; |
| |
| have_code = false; |
| |
| irelend = internal_relocs + sec->reloc_count; |
| for (irel = internal_relocs; irel < irelend; irel++) |
| { |
| bfd_vma laddr, paddr, symval; |
| unsigned short insn; |
| struct internal_reloc *irelfn, *irelscan, *irelcount; |
| struct internal_syment sym; |
| bfd_signed_vma foff; |
| |
| if (irel->r_type == R_SH_CODE) |
| have_code = true; |
| |
| if (irel->r_type != R_SH_USES) |
| continue; |
| |
| /* Get the section contents. */ |
| if (contents == NULL) |
| { |
| if (coff_section_data (abfd, sec)->contents != NULL) |
| contents = coff_section_data (abfd, sec)->contents; |
| else |
| { |
| if (!bfd_malloc_and_get_section (abfd, sec, &contents)) |
| goto error_return; |
| } |
| } |
| |
| /* The r_offset field of the R_SH_USES reloc will point us to |
| the register load. The 4 is because the r_offset field is |
| computed as though it were a jump offset, which are based |
| from 4 bytes after the jump instruction. */ |
| laddr = irel->r_vaddr - sec->vma + 4; |
| /* Careful to sign extend the 32-bit offset. */ |
| laddr += ((irel->r_offset & 0xffffffff) ^ 0x80000000) - 0x80000000; |
| if (laddr >= sec->size) |
| { |
| /* xgettext: c-format */ |
| _bfd_error_handler |
| (_("%pB: %#" PRIx64 ": warning: bad R_SH_USES offset"), |
| abfd, (uint64_t) irel->r_vaddr); |
| continue; |
| } |
| insn = bfd_get_16 (abfd, contents + laddr); |
| |
| /* If the instruction is not mov.l NN,rN, we don't know what to do. */ |
| if ((insn & 0xf000) != 0xd000) |
| { |
| _bfd_error_handler |
| /* xgettext: c-format */ |
| (_("%pB: %#" PRIx64 ": warning: R_SH_USES points to unrecognized insn %#x"), |
| abfd, (uint64_t) irel->r_vaddr, insn); |
| continue; |
| } |
| |
| /* Get the address from which the register is being loaded. The |
| displacement in the mov.l instruction is quadrupled. It is a |
| displacement from four bytes after the movl instruction, but, |
| before adding in the PC address, two least significant bits |
| of the PC are cleared. We assume that the section is aligned |
| on a four byte boundary. */ |
| paddr = insn & 0xff; |
| paddr *= 4; |
| paddr += (laddr + 4) &~ (bfd_vma) 3; |
| if (paddr >= sec->size) |
| { |
| _bfd_error_handler |
| /* xgettext: c-format */ |
| (_("%pB: %#" PRIx64 ": warning: bad R_SH_USES load offset"), |
| abfd, (uint64_t) irel->r_vaddr); |
| continue; |
| } |
| |
| /* Get the reloc for the address from which the register is |
| being loaded. This reloc will tell us which function is |
| actually being called. */ |
| paddr += sec->vma; |
| for (irelfn = internal_relocs; irelfn < irelend; irelfn++) |
| if (irelfn->r_vaddr == paddr |
| #ifdef COFF_WITH_PE |
| && (irelfn->r_type == R_SH_IMM32 |
| || irelfn->r_type == R_SH_IMM32CE |
| || irelfn->r_type == R_SH_IMAGEBASE) |
| |
| #else |
| && irelfn->r_type == R_SH_IMM32 |
| #endif |
| ) |
| break; |
| if (irelfn >= irelend) |
| { |
| _bfd_error_handler |
| /* xgettext: c-format */ |
| (_("%pB: %#" PRIx64 ": warning: could not find expected reloc"), |
| abfd, (uint64_t) paddr); |
| continue; |
| } |
| |
| /* Get the value of the symbol referred to by the reloc. */ |
| if (! _bfd_coff_get_external_symbols (abfd)) |
| goto error_return; |
| bfd_coff_swap_sym_in (abfd, |
| ((bfd_byte *) obj_coff_external_syms (abfd) |
| + (irelfn->r_symndx |
| * bfd_coff_symesz (abfd))), |
| &sym); |
| if (sym.n_scnum != 0 && sym.n_scnum != sec->target_index) |
| { |
| _bfd_error_handler |
| /* xgettext: c-format */ |
| (_("%pB: %#" PRIx64 ": warning: symbol in unexpected section"), |
| abfd, (uint64_t) paddr); |
| continue; |
| } |
| |
| if (sym.n_sclass != C_EXT) |
| { |
| symval = (sym.n_value |
| - sec->vma |
| + sec->output_section->vma |
| + sec->output_offset); |
| } |
| else |
| { |
| struct coff_link_hash_entry *h; |
| |
| h = obj_coff_sym_hashes (abfd)[irelfn->r_symndx]; |
| 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); |
| } |
| |
| symval += bfd_get_32 (abfd, contents + paddr - sec->vma); |
| |
| /* See if this function call can be shortened. */ |
| foff = (symval |
| - (irel->r_vaddr |
| - sec->vma |
| + sec->output_section->vma |
| + sec->output_offset |
| + 4)); |
| if (foff < -0x1000 || foff >= 0x1000) |
| { |
| /* After all that work, we can't shorten this function call. */ |
| continue; |
| } |
| |
| /* Shorten the function call. */ |
| |
| /* 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. */ |
| |
| coff_section_data (abfd, sec)->relocs = internal_relocs; |
| coff_section_data (abfd, sec)->contents = contents; |
| |
| /* Replace the jsr with a bsr. */ |
| |
| /* Change the R_SH_USES reloc into an R_SH_PCDISP reloc, and |
| replace the jsr with a bsr. */ |
| irel->r_type = R_SH_PCDISP; |
| irel->r_symndx = irelfn->r_symndx; |
| if (sym.n_sclass != C_EXT) |
| { |
| /* If this needs to be changed because of future relaxing, |
| it will be handled here like other internal PCDISP |
| relocs. */ |
| bfd_put_16 (abfd, |
| (bfd_vma) 0xb000 | ((foff >> 1) & 0xfff), |
| contents + irel->r_vaddr - sec->vma); |
| } |
| else |
| { |
| /* We can't fully resolve this yet, because the external |
| symbol value may be changed by future relaxing. We let |
| the final link phase handle it. */ |
| bfd_put_16 (abfd, (bfd_vma) 0xb000, |
| contents + irel->r_vaddr - sec->vma); |
| } |
| |
| /* See if there is another R_SH_USES reloc referring to the same |
| register load. */ |
| for (irelscan = internal_relocs; irelscan < irelend; irelscan++) |
| if (irelscan->r_type == R_SH_USES |
| && laddr == irelscan->r_vaddr - sec->vma + 4 + irelscan->r_offset) |
| break; |
| if (irelscan < irelend) |
| { |
| /* Some other function call depends upon this register load, |
| and we have not yet converted that function call. |
| Indeed, we may never be able to convert it. There is |
| nothing else we can do at this point. */ |
| continue; |
| } |
| |
| /* Look for a R_SH_COUNT reloc on the location where the |
| function address is stored. Do this before deleting any |
| bytes, to avoid confusion about the address. */ |
| for (irelcount = internal_relocs; irelcount < irelend; irelcount++) |
| if (irelcount->r_vaddr == paddr |
| && irelcount->r_type == R_SH_COUNT) |
| break; |
| |
| /* Delete the register load. */ |
| if (! sh_relax_delete_bytes (abfd, sec, laddr, 2)) |
| goto error_return; |
| |
| /* That will change things, so, just in case it permits some |
| other function call to come within range, we should relax |
| again. Note that this is not required, and it may be slow. */ |
| *again = true; |
| |
| /* Now check whether we got a COUNT reloc. */ |
| if (irelcount >= irelend) |
| { |
| _bfd_error_handler |
| /* xgettext: c-format */ |
| (_("%pB: %#" PRIx64 ": warning: could not find expected COUNT reloc"), |
| abfd, (uint64_t) paddr); |
| continue; |
| } |
| |
| /* The number of uses is stored in the r_offset field. We've |
| just deleted one. */ |
| if (irelcount->r_offset == 0) |
| { |
| /* xgettext: c-format */ |
| _bfd_error_handler (_("%pB: %#" PRIx64 ": warning: bad count"), |
| abfd, (uint64_t) paddr); |
| continue; |
| } |
| |
| --irelcount->r_offset; |
| |
| /* If there are no more uses, we can delete the address. Reload |
| the address from irelfn, in case it was changed by the |
| previous call to sh_relax_delete_bytes. */ |
| if (irelcount->r_offset == 0) |
| { |
| if (! sh_relax_delete_bytes (abfd, sec, |
| irelfn->r_vaddr - sec->vma, 4)) |
| goto error_return; |
| } |
| |
| /* We've done all we can with that function call. */ |
| } |
| |
| /* Look for load and store instructions that we can align on four |
| byte boundaries. */ |
| if (have_code) |
| { |
| bool swapped; |
| |
| /* Get the section contents. */ |
| if (contents == NULL) |
| { |
| if (coff_section_data (abfd, sec)->contents != NULL) |
| contents = coff_section_data (abfd, sec)->contents; |
| else |
| { |
| if (!bfd_malloc_and_get_section (abfd, sec, &contents)) |
| goto error_return; |
| } |
| } |
| |
| if (! sh_align_loads (abfd, sec, internal_relocs, contents, &swapped)) |
| goto error_return; |
| |
| if (swapped) |
| { |
| coff_section_data (abfd, sec)->relocs = internal_relocs; |
| coff_section_data (abfd, sec)->contents = contents; |
| } |
| } |
| |
| if (internal_relocs != NULL |
| && internal_relocs != coff_section_data (abfd, sec)->relocs) |
| { |
| if (! link_info->keep_memory) |
| free (internal_relocs); |
| else |
| coff_section_data (abfd, sec)->relocs = internal_relocs; |
| } |
| |
| if (contents != NULL && contents != coff_section_data (abfd, sec)->contents) |
| { |
| if (! link_info->keep_memory) |
| free (contents); |
| else |
| /* Cache the section contents for coff_link_input_bfd. */ |
| coff_section_data (abfd, sec)->contents = contents; |
| } |
| |
| return true; |
| |
| error_return: |
| if (internal_relocs != coff_section_data (abfd, sec)->relocs) |
| free (internal_relocs); |
| if (contents != coff_section_data (abfd, sec)->contents) |
| free (contents); |
| return false; |
| } |
| |
| /* Delete some bytes from a section while relaxing. */ |
| |
| static bool |
| sh_relax_delete_bytes (bfd *abfd, |
| asection *sec, |
| bfd_vma addr, |
| int count) |
| { |
| bfd_byte *contents; |
| struct internal_reloc *irel, *irelend; |
| struct internal_reloc *irelalign; |
| bfd_vma toaddr; |
| bfd_byte *esym, *esymend; |
| bfd_size_type symesz; |
| struct coff_link_hash_entry **sym_hash; |
| asection *o; |
| |
| contents = coff_section_data (abfd, sec)->contents; |
| |
| /* The deletion must stop at the next ALIGN reloc for an alignment |
| power larger than the number of bytes we are deleting. */ |
| |
| irelalign = NULL; |
| toaddr = sec->size; |
| |
| irel = coff_section_data (abfd, sec)->relocs; |
| irelend = irel + sec->reloc_count; |
| for (; irel < irelend; irel++) |
| { |
| if (irel->r_type == R_SH_ALIGN |
| && irel->r_vaddr - sec->vma > addr |
| && count < (1 << irel->r_offset)) |
| { |
| irelalign = irel; |
| toaddr = irel->r_vaddr - sec->vma; |
| break; |
| } |
| } |
| |
| /* Actually delete the bytes. */ |
| memmove (contents + addr, contents + addr + count, |
| (size_t) (toaddr - addr - count)); |
| if (irelalign == NULL) |
| sec->size -= count; |
| else |
| { |
| int i; |
| |
| #define NOP_OPCODE (0x0009) |
| |
| BFD_ASSERT ((count & 1) == 0); |
| for (i = 0; i < count; i += 2) |
| bfd_put_16 (abfd, (bfd_vma) NOP_OPCODE, contents + toaddr - count + i); |
| } |
| |
| /* Adjust all the relocs. */ |
| for (irel = coff_section_data (abfd, sec)->relocs; irel < irelend; irel++) |
| { |
| bfd_vma nraddr, stop; |
| bfd_vma start = 0; |
| int insn = 0; |
| struct internal_syment sym; |
| int off, adjust, oinsn; |
| bfd_signed_vma voff = 0; |
| bool overflow; |
| |
| /* Get the new reloc address. */ |
| nraddr = irel->r_vaddr - sec->vma; |
| if ((irel->r_vaddr - sec->vma > addr |
| && irel->r_vaddr - sec->vma < toaddr) |
| || (irel->r_type == R_SH_ALIGN |
| && irel->r_vaddr - sec->vma == toaddr)) |
| nraddr -= count; |
| |
| /* See if this reloc was for the bytes we have deleted, in which |
| case we no longer care about it. Don't delete relocs which |
| represent addresses, though. */ |
| if (irel->r_vaddr - sec->vma >= addr |
| && irel->r_vaddr - sec->vma < addr + count |
| && irel->r_type != R_SH_ALIGN |
| && irel->r_type != R_SH_CODE |
| && irel->r_type != R_SH_DATA |
| && irel->r_type != R_SH_LABEL) |
| irel->r_type = R_SH_UNUSED; |
| |
| /* If this is a PC relative reloc, see if the range it covers |
| includes the bytes we have deleted. */ |
| switch (irel->r_type) |
| { |
| default: |
| break; |
| |
| case R_SH_PCDISP8BY2: |
| case R_SH_PCDISP: |
| case R_SH_PCRELIMM8BY2: |
| case R_SH_PCRELIMM8BY4: |
| start = irel->r_vaddr - sec->vma; |
| insn = bfd_get_16 (abfd, contents + nraddr); |
| break; |
| } |
| |
| switch (irel->r_type) |
| { |
| default: |
| start = stop = addr; |
| break; |
| |
| case R_SH_IMM32: |
| #ifdef COFF_WITH_PE |
| case R_SH_IMM32CE: |
| case R_SH_IMAGEBASE: |
| #endif |
| /* If this reloc is against a symbol defined in this |
| section, and the symbol will not be adjusted below, we |
| must check the addend to see it will put the value in |
| range to be adjusted, and hence must be changed. */ |
| bfd_coff_swap_sym_in (abfd, |
| ((bfd_byte *) obj_coff_external_syms (abfd) |
| + (irel->r_symndx |
| * bfd_coff_symesz (abfd))), |
| &sym); |
| if (sym.n_sclass != C_EXT |
| && sym.n_scnum == sec->target_index |
| && ((bfd_vma) sym.n_value <= addr |
| || (bfd_vma) sym.n_value >= toaddr)) |
| { |
| bfd_vma val; |
| |
| val = bfd_get_32 (abfd, contents + nraddr); |
| val += sym.n_value; |
| if (val > addr && val < toaddr) |
| bfd_put_32 (abfd, val - count, contents + nraddr); |
| } |
| start = stop = addr; |
| break; |
| |
| case R_SH_PCDISP8BY2: |
| off = insn & 0xff; |
| if (off & 0x80) |
| off -= 0x100; |
| stop = (bfd_vma) ((bfd_signed_vma) start + 4 + off * 2); |
| break; |
| |
| case R_SH_PCDISP: |
| bfd_coff_swap_sym_in (abfd, |
| ((bfd_byte *) obj_coff_external_syms (abfd) |
| + (irel->r_symndx |
| * bfd_coff_symesz (abfd))), |
| &sym); |
| if (sym.n_sclass == C_EXT) |
| start = stop = addr; |
| else |
| { |
| off = insn & 0xfff; |
| if (off & 0x800) |
| off -= 0x1000; |
| stop = (bfd_vma) ((bfd_signed_vma) start + 4 + off * 2); |
| } |
| break; |
| |
| case R_SH_PCRELIMM8BY2: |
| off = insn & 0xff; |
| stop = start + 4 + off * 2; |
| break; |
| |
| case R_SH_PCRELIMM8BY4: |
| off = insn & 0xff; |
| stop = (start &~ (bfd_vma) 3) + 4 + off * 4; |
| break; |
| |
| case R_SH_SWITCH8: |
| case R_SH_SWITCH16: |
| case R_SH_SWITCH32: |
| /* These relocs types represent |
| .word L2-L1 |
| The r_offset field holds the difference between the reloc |
| address and L1. That is the start of the reloc, and |
| adding in the contents gives us the top. We must adjust |
| both the r_offset field and the section contents. */ |
| |
| start = irel->r_vaddr - sec->vma; |
| stop = (bfd_vma) ((bfd_signed_vma) start - (long) irel->r_offset); |
| |
| if (start > addr |
| && start < toaddr |
| && (stop <= addr || stop >= toaddr)) |
| irel->r_offset += count; |
| else if (stop > addr |
| && stop < toaddr |
| && (start <= addr || start >= toaddr)) |
| irel->r_offset -= count; |
| |
| start = stop; |
| |
| if (irel->r_type == R_SH_SWITCH16) |
| voff = bfd_get_signed_16 (abfd, contents + nraddr); |
| else if (irel->r_type == R_SH_SWITCH8) |
| voff = bfd_get_8 (abfd, contents + nraddr); |
| else |
| voff = bfd_get_signed_32 (abfd, contents + nraddr); |
| stop = (bfd_vma) ((bfd_signed_vma) start + voff); |
| |
| break; |
| |
| case R_SH_USES: |
| start = irel->r_vaddr - sec->vma; |
| stop = (bfd_vma) ((bfd_signed_vma) start |
| + (long) irel->r_offset |
| + 4); |
| break; |
| } |
| |
| if (start > addr |
| && start < toaddr |
| && (stop <= addr || stop >= toaddr)) |
| adjust = count; |
| else if (stop > addr |
| && stop < toaddr |
| && (start <= addr || start >= toaddr)) |
| adjust = - count; |
| else |
| adjust = 0; |
| |
| if (adjust != 0) |
| { |
| oinsn = insn; |
| overflow = false; |
| switch (irel->r_type) |
| { |
| default: |
| abort (); |
| break; |
| |
| case R_SH_PCDISP8BY2: |
| case R_SH_PCRELIMM8BY2: |
| insn += adjust / 2; |
| if ((oinsn & 0xff00) != (insn & 0xff00)) |
| overflow = true; |
| bfd_put_16 (abfd, (bfd_vma) insn, contents + nraddr); |
| break; |
| |
| case R_SH_PCDISP: |
| insn += adjust / 2; |
| if ((oinsn & 0xf000) != (insn & 0xf000)) |
| overflow = true; |
| bfd_put_16 (abfd, (bfd_vma) insn, contents + nraddr); |
| break; |
| |
| case R_SH_PCRELIMM8BY4: |
| BFD_ASSERT (adjust == count || count >= 4); |
| if (count >= 4) |
| insn += adjust / 4; |
| else |
| { |
| if ((irel->r_vaddr & 3) == 0) |
| ++insn; |
| } |
| if ((oinsn & 0xff00) != (insn & 0xff00)) |
| overflow = true; |
| bfd_put_16 (abfd, (bfd_vma) insn, contents + nraddr); |
| break; |
| |
| case R_SH_SWITCH8: |
| voff += adjust; |
| if (voff < 0 || voff >= 0xff) |
| overflow = true; |
| bfd_put_8 (abfd, (bfd_vma) voff, contents + nraddr); |
| break; |
| |
| case R_SH_SWITCH16: |
| voff += adjust; |
| if (voff < - 0x8000 || voff >= 0x8000) |
| overflow = true; |
| bfd_put_signed_16 (abfd, (bfd_vma) voff, contents + nraddr); |
| break; |
| |
| case R_SH_SWITCH32: |
| voff += adjust; |
| bfd_put_signed_32 (abfd, (bfd_vma) voff, contents + nraddr); |
| break; |
| |
| case R_SH_USES: |
| irel->r_offset += adjust; |
| break; |
| } |
| |
| if (overflow) |
| { |
| _bfd_error_handler |
| /* xgettext: c-format */ |
| (_("%pB: %#" PRIx64 ": fatal: reloc overflow while relaxing"), |
| abfd, (uint64_t) irel->r_vaddr); |
| bfd_set_error (bfd_error_bad_value); |
| return false; |
| } |
| } |
| |
| irel->r_vaddr = nraddr + sec->vma; |
| } |
| |
| /* Look through all the other sections. If there contain any IMM32 |
| relocs against internal symbols which we are not going to adjust |
| below, we may need to adjust the addends. */ |
| for (o = abfd->sections; o != NULL; o = o->next) |
| { |
| struct internal_reloc *internal_relocs; |
| struct internal_reloc *irelscan, *irelscanend; |
| bfd_byte *ocontents; |
| |
| if (o == sec |
| || (o->flags & SEC_HAS_CONTENTS) == 0 |
| || (o->flags & SEC_RELOC) == 0 |
| || o->reloc_count == 0) |
| continue; |
| |
| /* We always cache the relocs. Perhaps, if info->keep_memory is |
| FALSE, we should free them, if we are permitted to, when we |
| leave sh_coff_relax_section. */ |
| internal_relocs = (_bfd_coff_read_internal_relocs |
| (abfd, o, true, (bfd_byte *) NULL, false, |
| (struct internal_reloc *) NULL)); |
| if (internal_relocs == NULL) |
| return false; |
| |
| ocontents = NULL; |
| irelscanend = internal_relocs + o->reloc_count; |
| for (irelscan = internal_relocs; irelscan < irelscanend; irelscan++) |
| { |
| struct internal_syment sym; |
| |
| #ifdef COFF_WITH_PE |
| if (irelscan->r_type != R_SH_IMM32 |
| && irelscan->r_type != R_SH_IMAGEBASE |
| && irelscan->r_type != R_SH_IMM32CE) |
| #else |
| if (irelscan->r_type != R_SH_IMM32) |
| #endif |
| continue; |
| |
| bfd_coff_swap_sym_in (abfd, |
| ((bfd_byte *) obj_coff_external_syms (abfd) |
| + (irelscan->r_symndx |
| * bfd_coff_symesz (abfd))), |
| &sym); |
| if (sym.n_sclass != C_EXT |
| && sym.n_scnum == sec->target_index |
| && ((bfd_vma) sym.n_value <= addr |
| || (bfd_vma) sym.n_value >= toaddr)) |
| { |
| bfd_vma val; |
| |
| if (ocontents == NULL) |
| { |
| if (coff_section_data (abfd, o)->contents != NULL) |
| ocontents = coff_section_data (abfd, o)->contents; |
| else |
| { |
| if (!bfd_malloc_and_get_section (abfd, o, &ocontents)) |
| return false; |
| /* We always cache the section contents. |
| Perhaps, if info->keep_memory is FALSE, we |
| should free them, if we are permitted to, |
| when we leave sh_coff_relax_section. */ |
| coff_section_data (abfd, o)->contents = ocontents; |
| } |
| } |
| |
| val = bfd_get_32 (abfd, ocontents + irelscan->r_vaddr - o->vma); |
| val += sym.n_value; |
| if (val > addr && val < toaddr) |
| bfd_put_32 (abfd, val - count, |
| ocontents + irelscan->r_vaddr - o->vma); |
| } |
| } |
| } |
| |
| /* Adjusting the internal symbols will not work if something has |
| already retrieved the generic symbols. It would be possible to |
| make this work by adjusting the generic symbols at the same time. |
| However, this case should not arise in normal usage. */ |
| if (obj_symbols (abfd) != NULL |
| || obj_raw_syments (abfd) != NULL) |
| { |
| _bfd_error_handler |
| (_("%pB: fatal: generic symbols retrieved before relaxing"), abfd); |
| bfd_set_error (bfd_error_invalid_operation); |
| return false; |
| } |
| |
| /* Adjust all the symbols. */ |
| sym_hash = obj_coff_sym_hashes (abfd); |
| symesz = bfd_coff_symesz (abfd); |
| esym = (bfd_byte *) obj_coff_external_syms (abfd); |
| esymend = esym + obj_raw_syment_count (abfd) * symesz; |
| while (esym < esymend) |
| { |
| struct internal_syment isym; |
| |
| bfd_coff_swap_sym_in (abfd, esym, &isym); |
| |
| if (isym.n_scnum == sec->target_index |
| && (bfd_vma) isym.n_value > addr |
| && (bfd_vma) isym.n_value < toaddr) |
| { |
| isym.n_value -= count; |
| |
| bfd_coff_swap_sym_out (abfd, &isym, esym); |
| |
| if (*sym_hash != NULL) |
| { |
| BFD_ASSERT ((*sym_hash)->root.type == bfd_link_hash_defined |
| || (*sym_hash)->root.type == bfd_link_hash_defweak); |
| BFD_ASSERT ((*sym_hash)->root.u.def.value >= addr |
| && (*sym_hash)->root.u.def.value < toaddr); |
| (*sym_hash)->root.u.def.value -= count; |
| } |
| } |
| |
| esym += (isym.n_numaux + 1) * symesz; |
| sym_hash += isym.n_numaux + 1; |
| } |
| |
| /* See if we can move the ALIGN reloc forward. We have adjusted |
| r_vaddr for it already. */ |
| if (irelalign != NULL) |
| { |
| bfd_vma alignto, alignaddr; |
| |
| alignto = BFD_ALIGN (toaddr, 1 << irelalign->r_offset); |
| alignaddr = BFD_ALIGN (irelalign->r_vaddr - sec->vma, |
| 1 << irelalign->r_offset); |
| if (alignto != alignaddr) |
| { |
| /* Tail recursion. */ |
| return sh_relax_delete_bytes (abfd, sec, alignaddr, |
| (int) (alignto - alignaddr)); |
| } |
| } |
| |
| return true; |
| } |
| |
| /* This is yet another version of the SH opcode table, used to rapidly |
| get information about a particular instruction. */ |
| |
| /* The opcode map is represented by an array of these structures. The |
| array is indexed by the high order four bits in the instruction. */ |
| |
| struct sh_major_opcode |
| { |
| /* A pointer to the instruction list. This is an array which |
| contains all the instructions with this major opcode. */ |
| const struct sh_minor_opcode *minor_opcodes; |
| /* The number of elements in minor_opcodes. */ |
| unsigned short count; |
| }; |
| |
| /* This structure holds information for a set of SH opcodes. The |
| instruction code is anded with the mask value, and the resulting |
| value is used to search the order opcode list. */ |
| |
| struct sh_minor_opcode |
| { |
| /* The sorted opcode list. */ |
| const struct sh_opcode *opcodes; |
| /* The number of elements in opcodes. */ |
| unsigned short count; |
| /* The mask value to use when searching the opcode list. */ |
| unsigned short mask; |
| }; |
| |
| /* This structure holds information for an SH instruction. An array |
| of these structures is sorted in order by opcode. */ |
| |
| struct sh_opcode |
| { |
| /* The code for this instruction, after it has been anded with the |
| mask value in the sh_major_opcode structure. */ |
| unsigned short opcode; |
| /* Flags for this instruction. */ |
| unsigned long flags; |
| }; |
| |
| /* Flag which appear in the sh_opcode structure. */ |
| |
| /* This instruction loads a value from memory. */ |
| #define LOAD (0x1) |
| |
| /* This instruction stores a value to memory. */ |
| #define STORE (0x2) |
| |
| /* This instruction is a branch. */ |
| #define BRANCH (0x4) |
| |
| /* This instruction has a delay slot. */ |
| #define DELAY (0x8) |
| |
| /* This instruction uses the value in the register in the field at |
| mask 0x0f00 of the instruction. */ |
| #define USES1 (0x10) |
| #define USES1_REG(x) ((x & 0x0f00) >> 8) |
| |
| /* This instruction uses the value in the register in the field at |
| mask 0x00f0 of the instruction. */ |
| #define USES2 (0x20) |
| #define USES2_REG(x) ((x & 0x00f0) >> 4) |
| |
| /* This instruction uses the value in register 0. */ |
| #define USESR0 (0x40) |
| |
| /* This instruction sets the value in the register in the field at |
| mask 0x0f00 of the instruction. */ |
| #define SETS1 (0x80) |
| #define SETS1_REG(x) ((x & 0x0f00) >> 8) |
| |
| /* This instruction sets the value in the register in the field at |
| mask 0x00f0 of the instruction. */ |
| #define SETS2 (0x100) |
| #define SETS2_REG(x) ((x & 0x00f0) >> 4) |
| |
| /* This instruction sets register 0. */ |
| #define SETSR0 (0x200) |
| |
| /* This instruction sets a special register. */ |
| #define SETSSP (0x400) |
| |
| /* This instruction uses a special register. */ |
| #define USESSP (0x800) |
| |
| /* This instruction uses the floating point register in the field at |
| mask 0x0f00 of the instruction. */ |
| #define USESF1 (0x1000) |
| #define USESF1_REG(x) ((x & 0x0f00) >> 8) |
| |
| /* This instruction uses the floating point register in the field at |
| mask 0x00f0 of the instruction. */ |
| #define USESF2 (0x2000) |
| #define USESF2_REG(x) ((x & 0x00f0) >> 4) |
| |
| /* This instruction uses floating point register 0. */ |
| #define USESF0 (0x4000) |
| |
| /* This instruction sets the floating point register in the field at |
| mask 0x0f00 of the instruction. */ |
| #define SETSF1 (0x8000) |
| #define SETSF1_REG(x) ((x & 0x0f00) >> 8) |
| |
| #define USESAS (0x10000) |
| #define USESAS_REG(x) (((((x) >> 8) - 2) & 3) + 2) |
| #define USESR8 (0x20000) |
| #define SETSAS (0x40000) |
| #define SETSAS_REG(x) USESAS_REG (x) |
| |
| #define MAP(a) a, sizeof a / sizeof a[0] |
| |
| #ifndef COFF_IMAGE_WITH_PE |
| |
| /* The opcode maps. */ |
| |
| static const struct sh_opcode sh_opcode00[] = |
| { |
| { 0x0008, SETSSP }, /* clrt */ |
| { 0x0009, 0 }, /* nop */ |
| { 0x000b, BRANCH | DELAY | USESSP }, /* rts */ |
| { 0x0018, SETSSP }, /* sett */ |
| { 0x0019, SETSSP }, /* div0u */ |
| { 0x001b, 0 }, /* sleep */ |
| { 0x0028, SETSSP }, /* clrmac */ |
| { 0x002b, BRANCH | DELAY | SETSSP }, /* rte */ |
| { 0x0038, USESSP | SETSSP }, /* ldtlb */ |
| { 0x0048, SETSSP }, /* clrs */ |
| { 0x0058, SETSSP } /* sets */ |
| }; |
| |
| static const struct sh_opcode sh_opcode01[] = |
| { |
| { 0x0003, BRANCH | DELAY | USES1 | SETSSP }, /* bsrf rn */ |
| { 0x000a, SETS1 | USESSP }, /* sts mach,rn */ |
| { 0x001a, SETS1 | USESSP }, /* sts macl,rn */ |
| { 0x0023, BRANCH | DELAY | USES1 }, /* braf rn */ |
| { 0x0029, SETS1 | USESSP }, /* movt rn */ |
| { 0x002a, SETS1 | USESSP }, /* sts pr,rn */ |
| { 0x005a, SETS1 | USESSP }, /* sts fpul,rn */ |
| { 0x006a, SETS1 | USESSP }, /* sts fpscr,rn / sts dsr,rn */ |
| { 0x0083, LOAD | USES1 }, /* pref @rn */ |
| { 0x007a, SETS1 | USESSP }, /* sts a0,rn */ |
| { 0x008a, SETS1 | USESSP }, /* sts x0,rn */ |
| { 0x009a, SETS1 | USESSP }, /* sts x1,rn */ |
| { 0x00aa, SETS1 | USESSP }, /* sts y0,rn */ |
| { 0x00ba, SETS1 | USESSP } /* sts y1,rn */ |
| }; |
| |
| static const struct sh_opcode sh_opcode02[] = |
| { |
| { 0x0002, SETS1 | USESSP }, /* stc <special_reg>,rn */ |
| { 0x0004, STORE | USES1 | USES2 | USESR0 }, /* mov.b rm,@(r0,rn) */ |
| { 0x0005, STORE | USES1 | USES2 | USESR0 }, /* mov.w rm,@(r0,rn) */ |
| { 0x0006, STORE | USES1 | USES2 | USESR0 }, /* mov.l rm,@(r0,rn) */ |
| { 0x0007, SETSSP | USES1 | USES2 }, /* mul.l rm,rn */ |
| { 0x000c, LOAD | SETS1 | USES2 | USESR0 }, /* mov.b @(r0,rm),rn */ |
| { 0x000d, LOAD | SETS1 | USES2 | USESR0 }, /* mov.w @(r0,rm),rn */ |
| { 0x000e, LOAD | SETS1 | USES2 | USESR0 }, /* mov.l @(r0,rm),rn */ |
| { 0x000f, LOAD|SETS1|SETS2|SETSSP|USES1|USES2|USESSP }, /* mac.l @rm+,@rn+ */ |
| }; |
| |
| static const struct sh_minor_opcode sh_opcode0[] = |
| { |
| { MAP (sh_opcode00), 0xffff }, |
| { MAP (sh_opcode01), 0xf0ff }, |
| { MAP (sh_opcode02), 0xf00f } |
| }; |
| |
| static const struct sh_opcode sh_opcode10[] = |
| { |
| { 0x1000, STORE | USES1 | USES2 } /* mov.l rm,@(disp,rn) */ |
| }; |
| |
| static const struct sh_minor_opcode sh_opcode1[] = |
| { |
| { MAP (sh_opcode10), 0xf000 } |
| }; |
| |
| static const struct sh_opcode sh_opcode20[] = |
| { |
| { 0x2000, STORE | USES1 | USES2 }, /* mov.b rm,@rn */ |
| { 0x2001, STORE | USES1 | USES2 }, /* mov.w rm,@rn */ |
| { 0x2002, STORE | USES1 | USES2 }, /* mov.l rm,@rn */ |
| { 0x2004, STORE | SETS1 | USES1 | USES2 }, /* mov.b rm,@-rn */ |
| { 0x2005, STORE | SETS1 | USES1 | USES2 }, /* mov.w rm,@-rn */ |
| { 0x2006, STORE | SETS1 | USES1 | USES2 }, /* mov.l rm,@-rn */ |
| { 0x2007, SETSSP | USES1 | USES2 | USESSP }, /* div0s */ |
| { 0x2008, SETSSP | USES1 | USES2 }, /* tst rm,rn */ |
| { 0x2009, SETS1 | USES1 | USES2 }, /* and rm,rn */ |
| { 0x200a, SETS1 | USES1 | USES2 }, /* xor rm,rn */ |
| { 0x200b, SETS1 | USES1 | USES2 }, /* or rm,rn */ |
| { 0x200c, SETSSP | USES1 | USES2 }, /* cmp/str rm,rn */ |
| { 0x200d, SETS1 | USES1 | USES2 }, /* xtrct rm,rn */ |
| { 0x200e, SETSSP | USES1 | USES2 }, /* mulu.w rm,rn */ |
| { 0x200f, SETSSP | USES1 | USES2 } /* muls.w rm,rn */ |
| }; |
| |
| static const struct sh_minor_opcode sh_opcode2[] = |
| { |
| { MAP (sh_opcode20), 0xf00f } |
| }; |
| |
| static const struct sh_opcode sh_opcode30[] = |
| { |
| { 0x3000, SETSSP | USES1 | USES2 }, /* cmp/eq rm,rn */ |
| { 0x3002, SETSSP | USES1 | USES2 }, /* cmp/hs rm,rn */ |
| { 0x3003, SETSSP | USES1 | USES2 }, /* cmp/ge rm,rn */ |
| { 0x3004, SETSSP | USESSP | USES1 | USES2 }, /* div1 rm,rn */ |
| { 0x3005, SETSSP | USES1 | USES2 }, /* dmulu.l rm,rn */ |
| { 0x3006, SETSSP | USES1 | USES2 }, /* cmp/hi rm,rn */ |
| { 0x3007, SETSSP | USES1 | USES2 }, /* cmp/gt rm,rn */ |
| { 0x3008, SETS1 | USES1 | USES2 }, /* sub rm,rn */ |
| { 0x300a, SETS1 | SETSSP | USES1 | USES2 | USESSP }, /* subc rm,rn */ |
| { 0x300b, SETS1 | SETSSP | USES1 | USES2 }, /* subv rm,rn */ |
| { 0x300c, SETS1 | USES1 | USES2 }, /* add rm,rn */ |
| { 0x300d, SETSSP | USES1 | USES2 }, /* dmuls.l rm,rn */ |
| { 0x300e, SETS1 | SETSSP | USES1 | USES2 | USESSP }, /* addc rm,rn */ |
| { 0x300f, SETS1 | SETSSP | USES1 | USES2 } /* addv rm,rn */ |
| }; |
| |
| static const struct sh_minor_opcode sh_opcode3[] = |
| { |
| { MAP (sh_opcode30), 0xf00f } |
| }; |
| |
| static const struct sh_opcode sh_opcode40[] = |
| { |
| { 0x4000, SETS1 | SETSSP | USES1 }, /* shll rn */ |
| { 0x4001, SETS1 | SETSSP | USES1 }, /* shlr rn */ |
| { 0x4002, STORE | SETS1 | USES1 | USESSP }, /* sts.l mach,@-rn */ |
| { 0x4004, SETS1 | SETSSP | USES1 }, /* rotl rn */ |
| { 0x4005, SETS1 | SETSSP | USES1 }, /* rotr rn */ |
| { 0x4006, LOAD | SETS1 | SETSSP | USES1 }, /* lds.l @rm+,mach */ |
| { 0x4008, SETS1 | USES1 }, /* shll2 rn */ |
| { 0x4009, SETS1 | USES1 }, /* shlr2 rn */ |
| { 0x400a, SETSSP | USES1 }, /* lds rm,mach */ |
| { 0x400b, BRANCH | DELAY | USES1 }, /* jsr @rn */ |
| { 0x4010, SETS1 | SETSSP | USES1 }, /* dt rn */ |
| { 0x4011, SETSSP | USES1 }, /* cmp/pz rn */ |
| { 0x4012, STORE | SETS1 | USES1 | USESSP }, /* sts.l macl,@-rn */ |
| { 0x4014, SETSSP | USES1 }, /* setrc rm */ |
| { 0x4015, SETSSP | USES1 }, /* cmp/pl rn */ |
| { 0x4016, LOAD | SETS1 | SETSSP | USES1 }, /* lds.l @rm+,macl */ |
| { 0x4018, SETS1 | USES1 }, /* shll8 rn */ |
| { 0x4019, SETS1 | USES1 }, /* shlr8 rn */ |
| { 0x401a, SETSSP | USES1 }, /* lds rm,macl */ |
| { 0x401b, LOAD | SETSSP | USES1 }, /* tas.b @rn */ |
| { 0x4020, SETS1 | SETSSP | USES1 }, /* shal rn */ |
| { 0x4021, SETS1 | SETSSP | USES1 }, /* shar rn */ |
| { 0x4022, STORE | SETS1 | USES1 | USESSP }, /* sts.l pr,@-rn */ |
| { 0x4024, SETS1 | SETSSP | USES1 | USESSP }, /* rotcl rn */ |
| { 0x4025, SETS1 | SETSSP | USES1 | USESSP }, /* rotcr rn */ |
| { 0x4026, LOAD | SETS1 | SETSSP | USES1 }, /* lds.l @rm+,pr */ |
| { 0x4028, SETS1 | USES1 }, /* shll16 rn */ |
| { 0x4029, SETS1 | USES1 }, /* shlr16 rn */ |
| { 0x402a, SETSSP | USES1 }, /* lds rm,pr */ |
| { 0x402b, BRANCH | DELAY | USES1 }, /* jmp @rn */ |
| { 0x4052, STORE | SETS1 | USES1 | USESSP }, /* sts.l fpul,@-rn */ |
| { 0x4056, LOAD | SETS1 | SETSSP | USES1 }, /* lds.l @rm+,fpul */ |
| { 0x405a, SETSSP | USES1 }, /* lds.l rm,fpul */ |
| { 0x4062, STORE | SETS1 | USES1 | USESSP }, /* sts.l fpscr / dsr,@-rn */ |
| { 0x4066, LOAD | SETS1 | SETSSP | USES1 }, /* lds.l @rm+,fpscr / dsr */ |
| { 0x406a, SETSSP | USES1 }, /* lds rm,fpscr / lds rm,dsr */ |
| { 0x4072, STORE | SETS1 | USES1 | USESSP }, /* sts.l a0,@-rn */ |
| { 0x4076, LOAD | SETS1 | SETSSP | USES1 }, /* lds.l @rm+,a0 */ |
| { 0x407a, SETSSP | USES1 }, /* lds.l rm,a0 */ |
| { 0x4082, STORE | SETS1 | USES1 | USESSP }, /* sts.l x0,@-rn */ |
| { 0x4086, LOAD | SETS1 | SETSSP | USES1 }, /* lds.l @rm+,x0 */ |
| { 0x408a, SETSSP | USES1 }, /* lds.l rm,x0 */ |
| { 0x4092, STORE | SETS1 | USES1 | USESSP }, /* sts.l x1,@-rn */ |
| { 0x4096, LOAD | SETS1 | SETSSP | USES1 }, /* lds.l @rm+,x1 */ |
| { 0x409a, SETSSP | USES1 }, /* lds.l rm,x1 */ |
| { 0x40a2, STORE | SETS1 | USES1 | USESSP }, /* sts.l y0,@-rn */ |
| { 0x40a6, LOAD | SETS1 | SETSSP | USES1 }, /* lds.l @rm+,y0 */ |
| { 0x40aa, SETSSP | USES1 }, /* lds.l rm,y0 */ |
| { 0x40b2, STORE | SETS1 | USES1 | USESSP }, /* sts.l y1,@-rn */ |
| { 0x40b6, LOAD | SETS1 | SETSSP | USES1 }, /* lds.l @rm+,y1 */ |
| { 0x40ba, SETSSP | USES1 } /* lds.l rm,y1 */ |
| }; |
| |
| static const struct sh_opcode sh_opcode41[] = |
| { |
| { 0x4003, STORE | SETS1 | USES1 | USESSP }, /* stc.l <special_reg>,@-rn */ |
| { 0x4007, LOAD | SETS1 | SETSSP | USES1 }, /* ldc.l @rm+,<special_reg> */ |
| { 0x400c, SETS1 | USES1 | USES2 }, /* shad rm,rn */ |
| { 0x400d, SETS1 | USES1 | USES2 }, /* shld rm,rn */ |
| { 0x400e, SETSSP | USES1 }, /* ldc rm,<special_reg> */ |
| { 0x400f, LOAD|SETS1|SETS2|SETSSP|USES1|USES2|USESSP }, /* mac.w @rm+,@rn+ */ |
| }; |
| |
| static const struct sh_minor_opcode sh_opcode4[] = |
| { |
| { MAP (sh_opcode40), 0xf0ff }, |
| { MAP (sh_opcode41), 0xf00f } |
| }; |
| |
| static const struct sh_opcode sh_opcode50[] = |
| { |
| { 0x5000, LOAD | SETS1 | USES2 } /* mov.l @(disp,rm),rn */ |
| }; |
| |
| static const struct sh_minor_opcode sh_opcode5[] = |
| { |
| { MAP (sh_opcode50), 0xf000 } |
| }; |
| |
| static const struct sh_opcode sh_opcode60[] = |
| { |
| { 0x6000, LOAD | SETS1 | USES2 }, /* mov.b @rm,rn */ |
| { 0x6001, LOAD | SETS1 | USES2 }, /* mov.w @rm,rn */ |
| { 0x6002, LOAD | SETS1 | USES2 }, /* mov.l @rm,rn */ |
| { 0x6003, SETS1 | USES2 }, /* mov rm,rn */ |
| { 0x6004, LOAD | SETS1 | SETS2 | USES2 }, /* mov.b @rm+,rn */ |
| { 0x6005, LOAD | SETS1 | SETS2 | USES2 }, /* mov.w @rm+,rn */ |
| { 0x6006, LOAD | SETS1 | SETS2 | USES2 }, /* mov.l @rm+,rn */ |
| { 0x6007, SETS1 | USES2 }, /* not rm,rn */ |
| { 0x6008, SETS1 | USES2 }, /* swap.b rm,rn */ |
| { 0x6009, SETS1 | USES2 }, /* swap.w rm,rn */ |
| { 0x600a, SETS1 | SETSSP | USES2 | USESSP }, /* negc rm,rn */ |
| { 0x600b, SETS1 | USES2 }, /* neg rm,rn */ |
| { 0x600c, SETS1 | USES2 }, /* extu.b rm,rn */ |
| { 0x600d, SETS1 | USES2 }, /* extu.w rm,rn */ |
| { 0x600e, SETS1 | USES2 }, /* exts.b rm,rn */ |
| { 0x600f, SETS1 | USES2 } /* exts.w rm,rn */ |
| }; |
| |
| static const struct sh_minor_opcode sh_opcode6[] = |
| { |
| { MAP (sh_opcode60), 0xf00f } |
| }; |
| |
| static const struct sh_opcode sh_opcode70[] = |
| { |
| { 0x7000, SETS1 | USES1 } /* add #imm,rn */ |
| }; |
| |
| static const struct sh_minor_opcode sh_opcode7[] = |
| { |
| { MAP (sh_opcode70), 0xf000 } |
| }; |
| |
| static const struct sh_opcode sh_opcode80[] = |
| { |
| { 0x8000, STORE | USES2 | USESR0 }, /* mov.b r0,@(disp,rn) */ |
| { 0x8100, STORE | USES2 | USESR0 }, /* mov.w r0,@(disp,rn) */ |
| { 0x8200, SETSSP }, /* setrc #imm */ |
| { 0x8400, LOAD | SETSR0 | USES2 }, /* mov.b @(disp,rm),r0 */ |
| { 0x8500, LOAD | SETSR0 | USES2 }, /* mov.w @(disp,rn),r0 */ |
| { 0x8800, SETSSP | USESR0 }, /* cmp/eq #imm,r0 */ |
| { 0x8900, BRANCH | USESSP }, /* bt label */ |
| { 0x8b00, BRANCH | USESSP }, /* bf label */ |
| { 0x8c00, SETSSP }, /* ldrs @(disp,pc) */ |
| { 0x8d00, BRANCH | DELAY | USESSP }, /* bt/s label */ |
| { 0x8e00, SETSSP }, /* ldre @(disp,pc) */ |
| { 0x8f00, BRANCH | DELAY | USESSP } /* bf/s label */ |
| }; |
| |
| static const struct sh_minor_opcode sh_opcode8[] = |
| { |
| { MAP (sh_opcode80), 0xff00 } |
| }; |
| |
| static const struct sh_opcode sh_opcode90[] = |
| { |
| { 0x9000, LOAD | SETS1 } /* mov.w @(disp,pc),rn */ |
| }; |
| |
| static const struct sh_minor_opcode sh_opcode9[] = |
| { |
| { MAP (sh_opcode90), 0xf000 } |
| }; |
| |
| static const struct sh_opcode sh_opcodea0[] = |
| { |
| { 0xa000, BRANCH | DELAY } /* bra label */ |
| }; |
| |
| static const struct sh_minor_opcode sh_opcodea[] = |
| { |
| { MAP (sh_opcodea0), 0xf000 } |
| }; |
| |
| static const struct sh_opcode sh_opcodeb0[] = |
| { |
| { 0xb000, BRANCH | DELAY } /* bsr label */ |
| }; |
| |
| static const struct sh_minor_opcode sh_opcodeb[] = |
| { |
| { MAP (sh_opcodeb0), 0xf000 } |
| }; |
| |
| static const struct sh_opcode sh_opcodec0[] = |
| { |
| { 0xc000, STORE | USESR0 | USESSP }, /* mov.b r0,@(disp,gbr) */ |
| { 0xc100, STORE | USESR0 | USESSP }, /* mov.w r0,@(disp,gbr) */ |
| { 0xc200, STORE | USESR0 | USESSP }, /* mov.l r0,@(disp,gbr) */ |
| { 0xc300, BRANCH | USESSP }, /* trapa #imm */ |
| { 0xc400, LOAD | SETSR0 | USESSP }, /* mov.b @(disp,gbr),r0 */ |
| { 0xc500, LOAD | SETSR0 | USESSP }, /* mov.w @(disp,gbr),r0 */ |
| { 0xc600, LOAD | SETSR0 | USESSP }, /* mov.l @(disp,gbr),r0 */ |
| { 0xc700, SETSR0 }, /* mova @(disp,pc),r0 */ |
| { 0xc800, SETSSP | USESR0 }, /* tst #imm,r0 */ |
| { 0xc900, SETSR0 | USESR0 }, /* and #imm,r0 */ |
| { 0xca00, SETSR0 | USESR0 }, /* xor #imm,r0 */ |
| { 0xcb00, SETSR0 | USESR0 }, /* or #imm,r0 */ |
| { 0xcc00, LOAD | SETSSP | USESR0 | USESSP }, /* tst.b #imm,@(r0,gbr) */ |
| { 0xcd00, LOAD | STORE | USESR0 | USESSP }, /* and.b #imm,@(r0,gbr) */ |
| { 0xce00, LOAD | STORE | USESR0 | USESSP }, /* xor.b #imm,@(r0,gbr) */ |
| { 0xcf00, LOAD | STORE | USESR0 | USESSP } /* or.b #imm,@(r0,gbr) */ |
| }; |
| |
| static const struct sh_minor_opcode sh_opcodec[] = |
| { |
| { MAP (sh_opcodec0), 0xff00 } |
| }; |
| |
| static const struct sh_opcode sh_opcoded0[] = |
| { |
| { 0xd000, LOAD | SETS1 } /* mov.l @(disp,pc),rn */ |
| }; |
| |
| static const struct sh_minor_opcode sh_opcoded[] = |
| { |
| { MAP (sh_opcoded0), 0xf000 } |
| }; |
| |
| static const struct sh_opcode sh_opcodee0[] = |
| { |
| { 0xe000, SETS1 } /* mov #imm,rn */ |
| }; |
| |
| static const struct sh_minor_opcode sh_opcodee[] = |
| { |
| { MAP (sh_opcodee0), 0xf000 } |
| }; |
| |
| static const struct sh_opcode sh_opcodef0[] = |
| { |
| { 0xf000, SETSF1 | USESF1 | USESF2 }, /* fadd fm,fn */ |
| { 0xf001, SETSF1 | USESF1 | USESF2 }, /* fsub fm,fn */ |
| { 0xf002, SETSF1 | USESF1 | USESF2 }, /* fmul fm,fn */ |
| { 0xf003, SETSF1 | USESF1 | USESF2 }, /* fdiv fm,fn */ |
| { 0xf004, SETSSP | USESF1 | USESF2 }, /* fcmp/eq fm,fn */ |
| { 0xf005, SETSSP | USESF1 | USESF2 }, /* fcmp/gt fm,fn */ |
| { 0xf006, LOAD | SETSF1 | USES2 | USESR0 }, /* fmov.s @(r0,rm),fn */ |
| { 0xf007, STORE | USES1 | USESF2 | USESR0 }, /* fmov.s fm,@(r0,rn) */ |
| { 0xf008, LOAD | SETSF1 | USES2 }, /* fmov.s @rm,fn */ |
| { 0xf009, LOAD | SETS2 | SETSF1 | USES2 }, /* fmov.s @rm+,fn */ |
| { 0xf00a, STORE | USES1 | USESF2 }, /* fmov.s fm,@rn */ |
| { 0xf00b, STORE | SETS1 | USES1 | USESF2 }, /* fmov.s fm,@-rn */ |
| { 0xf00c, SETSF1 | USESF2 }, /* fmov fm,fn */ |
| { 0xf00e, SETSF1 | USESF1 | USESF2 | USESF0 } /* fmac f0,fm,fn */ |
| }; |
| |
| static const struct sh_opcode sh_opcodef1[] = |
| { |
| { 0xf00d, SETSF1 | USESSP }, /* fsts fpul,fn */ |
| { 0xf01d, SETSSP | USESF1 }, /* flds fn,fpul */ |
| { 0xf02d, SETSF1 | USESSP }, /* float fpul,fn */ |
| { 0xf03d, SETSSP | USESF1 }, /* ftrc fn,fpul */ |
| { 0xf04d, SETSF1 | USESF1 }, /* fneg fn */ |
| { 0xf05d, SETSF1 | USESF1 }, /* fabs fn */ |
| { 0xf06d, SETSF1 | USESF1 }, /* fsqrt fn */ |
| { 0xf07d, SETSSP | USESF1 }, /* ftst/nan fn */ |
| { 0xf08d, SETSF1 }, /* fldi0 fn */ |
| { 0xf09d, SETSF1 } /* fldi1 fn */ |
| }; |
| |
| static const struct sh_minor_opcode sh_opcodef[] = |
| { |
| { MAP (sh_opcodef0), 0xf00f }, |
| { MAP (sh_opcodef1), 0xf0ff } |
| }; |
| |
| static struct sh_major_opcode sh_opcodes[] = |
| { |
| { MAP (sh_opcode0) }, |
| { MAP (sh_opcode1) }, |
| { MAP (sh_opcode2) }, |
| { MAP (sh_opcode3) }, |
| { MAP (sh_opcode4) }, |
| { MAP (sh_opcode5) }, |
| { MAP (sh_opcode6) }, |
| { MAP (sh_opcode7) }, |
| { MAP (sh_opcode8) }, |
| { MAP (sh_opcode9) }, |
| { MAP (sh_opcodea) }, |
| { MAP (sh_opcodeb) }, |
| { MAP (sh_opcodec) }, |
| { MAP (sh_opcoded) }, |
| { MAP (sh_opcodee) }, |
| { MAP (sh_opcodef) } |
| }; |
| |
| /* The double data transfer / parallel processing insns are not |
| described here. This will cause sh_align_load_span to leave them alone. */ |
| |
| static const struct sh_opcode sh_dsp_opcodef0[] = |
| { |
| { 0xf400, USESAS | SETSAS | LOAD | SETSSP }, /* movs.x @-as,ds */ |
| { 0xf401, USESAS | SETSAS | STORE | USESSP }, /* movs.x ds,@-as */ |
| { 0xf404, USESAS | LOAD | SETSSP }, /* movs.x @as,ds */ |
| { 0xf405, USESAS | STORE | USESSP }, /* movs.x ds,@as */ |
| { 0xf408, USESAS | SETSAS | LOAD | SETSSP }, /* movs.x @as+,ds */ |
| { 0xf409, USESAS | SETSAS | STORE | USESSP }, /* movs.x ds,@as+ */ |
| { 0xf40c, USESAS | SETSAS | LOAD | SETSSP | USESR8 }, /* movs.x @as+r8,ds */ |
| { 0xf40d, USESAS | SETSAS | STORE | USESSP | USESR8 } /* movs.x ds,@as+r8 */ |
| }; |
| |
| static const struct sh_minor_opcode sh_dsp_opcodef[] = |
| { |
| { MAP (sh_dsp_opcodef0), 0xfc0d } |
| }; |
| |
| /* Given an instruction, return a pointer to the corresponding |
| sh_opcode structure. Return NULL if the instruction is not |
| recognized. */ |
| |
| static const struct sh_opcode * |
| sh_insn_info (unsigned int insn) |
| { |
| const struct sh_major_opcode *maj; |
| const struct sh_minor_opcode *min, *minend; |
| |
| maj = &sh_opcodes[(insn & 0xf000) >> 12]; |
| min = maj->minor_opcodes; |
| minend = min + maj->count; |
| for (; min < minend; min++) |
| { |
| unsigned int l; |
| const struct sh_opcode *op, *opend; |
| |
| l = insn & min->mask; |
| op = min->opcodes; |
| opend = op + min->count; |
| |
| /* Since the opcodes tables are sorted, we could use a binary |
| search here if the count were above some cutoff value. */ |
| for (; op < opend; op++) |
| if (op->opcode == l) |
| return op; |
| } |
| |
| return NULL; |
| } |
| |
| /* See whether an instruction uses a general purpose register. */ |
| |
| static bool |
| sh_insn_uses_reg (unsigned int insn, |
| const struct sh_opcode *op, |
| unsigned int reg) |
| { |
| unsigned int f; |
| |
| f = op->flags; |
| |
| if ((f & USES1) != 0 |
| && USES1_REG (insn) == reg) |
| return true; |
| if ((f & USES2) != 0 |
| && USES2_REG (insn) == reg) |
| return true; |
| if ((f & USESR0) != 0 |
| && reg == 0) |
| return true; |
| if ((f & USESAS) && reg == USESAS_REG (insn)) |
| return true; |
| if ((f & USESR8) && reg == 8) |
| return true; |
| |
| return false; |
| } |
| |
| /* See whether an instruction sets a general purpose register. */ |
| |
| static bool |
| sh_insn_sets_reg (unsigned int insn, |
| const struct sh_opcode *op, |
| unsigned int reg) |
| { |
| unsigned int f; |
| |
| f = op->flags; |
| |
| if ((f & SETS1) != 0 |
| && SETS1_REG (insn) == reg) |
| return true; |
| if ((f & SETS2) != 0 |
| && SETS2_REG (insn) == reg) |
| return true; |
| if ((f & SETSR0) != 0 |
| && reg == 0) |
| return true; |
| if ((f & SETSAS) && reg == SETSAS_REG (insn)) |
| return true; |
| |
| return false; |
| } |
| |
| /* See whether an instruction uses or sets a general purpose register */ |
| |
| static bool |
| sh_insn_uses_or_sets_reg (unsigned int insn, |
| const struct sh_opcode *op, |
| unsigned int reg) |
| { |
| if (sh_insn_uses_reg (insn, op, reg)) |
| return true; |
| |
| return sh_insn_sets_reg (insn, op, reg); |
| } |
| |
| /* See whether an instruction uses a floating point register. */ |
| |
| static bool |
| sh_insn_uses_freg (unsigned int insn, |
| const struct sh_opcode *op, |
| unsigned int freg) |
| { |
| unsigned int f; |
| |
| f = op->flags; |
| |
| /* We can't tell if this is a double-precision insn, so just play safe |
| and assume that it might be. So not only have we test FREG against |
| itself, but also even FREG against FREG+1 - if the using insn uses |
| just the low part of a double precision value - but also an odd |
| FREG against FREG-1 - if the setting insn sets just the low part |
| of a double precision value. |
| So what this all boils down to is that we have to ignore the lowest |
| bit of the register number. */ |
| |
| if ((f & USESF1) != 0 |
| && (USESF1_REG (insn) & 0xe) == (freg & 0xe)) |
| return true; |
| if ((f & USESF2) != 0 |
| && (USESF2_REG (insn) & 0xe) == (freg & 0xe)) |
| return true; |
| if ((f & USESF0) != 0 |
| && freg == 0) |
| return true; |
| |
| return false; |
| } |
| |
| /* See whether an instruction sets a floating point register. */ |
| |
| static bool |
| sh_insn_sets_freg (unsigned int insn, |
| const struct sh_opcode *op, |
| unsigned int freg) |
| { |
| unsigned int f; |
| |
| f = op->flags; |
| |
| /* We can't tell if this is a double-precision insn, so just play safe |
| and assume that it might be. So not only have we test FREG against |
| itself, but also even FREG against FREG+1 - if the using insn uses |
| just the low part of a double precision value - but also an odd |
| FREG against FREG-1 - if the setting insn sets just the low part |
| of a double precision value. |
| So what this all boils down to is that we have to ignore the lowest |
| bit of the register number. */ |
| |
| if ((f & SETSF1) != 0 |
| && (SETSF1_REG (insn) & 0xe) == (freg & 0xe)) |
| return true; |
| |
| return false; |
| } |
| |
| /* See whether an instruction uses or sets a floating point register */ |
| |
| static bool |
| sh_insn_uses_or_sets_freg (unsigned int insn, |
| const struct sh_opcode *op, |
| unsigned int reg) |
| { |
| if (sh_insn_uses_freg (insn, op, reg)) |
| return true; |
| |
| return sh_insn_sets_freg (insn, op, reg); |
| } |
| |
| /* See whether instructions I1 and I2 conflict, assuming I1 comes |
| before I2. OP1 and OP2 are the corresponding sh_opcode structures. |
| This should return TRUE if there is a conflict, or FALSE if the |
| instructions can be swapped safely. */ |
| |
| static bool |
| sh_insns_conflict (unsigned int i1, |
| const struct sh_opcode *op1, |
| unsigned int i2, |
| const struct sh_opcode *op2) |
| { |
| unsigned int f1, f2; |
| |
| f1 = op1->flags; |
| f2 = op2->flags; |
| |
| /* Load of fpscr conflicts with floating point operations. |
| FIXME: shouldn't test raw opcodes here. */ |
| if (((i1 & 0xf0ff) == 0x4066 && (i2 & 0xf000) == 0xf000) |
| || ((i2 & 0xf0ff) == 0x4066 && (i1 & 0xf000) == 0xf000)) |
| return true; |
| |
| if ((f1 & (BRANCH | DELAY)) != 0 |
| || (f2 & (BRANCH | DELAY)) != 0) |
| return true; |
| |
| if (((f1 | f2) & SETSSP) |
| && (f1 & (SETSSP | USESSP)) |
| && (f2 & (SETSSP | USESSP))) |
| return true; |
| |
| if ((f1 & SETS1) != 0 |
| && sh_insn_uses_or_sets_reg (i2, op2, SETS1_REG (i1))) |
| return true; |
| if ((f1 & SETS2) != 0 |
| && sh_insn_uses_or_sets_reg (i2, op2, SETS2_REG (i1))) |
| return true; |
| if ((f1 & SETSR0) != 0 |
| && sh_insn_uses_or_sets_reg (i2, op2, 0)) |
| return true; |
| if ((f1 & SETSAS) |
| && sh_insn_uses_or_sets_reg (i2, op2, SETSAS_REG (i1))) |
| return true; |
| if ((f1 & SETSF1) != 0 |
| && sh_insn_uses_or_sets_freg (i2, op2, SETSF1_REG (i1))) |
| return true; |
| |
| if ((f2 & SETS1) != 0 |
| && sh_insn_uses_or_sets_reg (i1, op1, SETS1_REG (i2))) |
| return true; |
| if ((f2 & SETS2) != 0 |
| && sh_insn_uses_or_sets_reg (i1, op1, SETS2_REG (i2))) |
| return true; |
| if ((f2 & SETSR0) != 0 |
| && sh_insn_uses_or_sets_reg (i1, op1, 0)) |
| return true; |
| if ((f2 & SETSAS) |
| && sh_insn_uses_or_sets_reg (i1, op1, SETSAS_REG (i2))) |
| return true; |
| if ((f2 & SETSF1) != 0 |
| && sh_insn_uses_or_sets_freg (i1, op1, SETSF1_REG (i2))) |
| return true; |
| |
| /* The instructions do not conflict. */ |
| return false; |
| } |
| |
| /* I1 is a load instruction, and I2 is some other instruction. Return |
| TRUE if I1 loads a register which I2 uses. */ |
| |
| static bool |
| sh_load_use (unsigned int i1, |
| const struct sh_opcode *op1, |
| unsigned int i2, |
| const struct sh_opcode *op2) |
| { |
| unsigned int f1; |
| |
| f1 = op1->flags; |
| |
| if ((f1 & LOAD) == 0) |
| return false; |
| |
| /* If both SETS1 and SETSSP are set, that means a load to a special |
| register using postincrement addressing mode, which we don't care |
| about here. */ |
| if ((f1 & SETS1) != 0 |
| && (f1 & SETSSP) == 0 |
| && sh_insn_uses_reg (i2, op2, (i1 & 0x0f00) >> 8)) |
| return true; |
| |
| if ((f1 & SETSR0) != 0 |
| && sh_insn_uses_reg (i2, op2, 0)) |
| return true; |
| |
| if ((f1 & SETSF1) != 0 |
| && sh_insn_uses_freg (i2, op2, (i1 & 0x0f00) >> 8)) |
| return true; |
| |
| return false; |
| } |
| |
| /* Try to align loads and stores within a span of memory. This is |
| called by both the ELF and the COFF sh targets. ABFD and SEC are |
| the BFD and section we are examining. CONTENTS is the contents of |
| the section. SWAP is the routine to call to swap two instructions. |
| RELOCS is a pointer to the internal relocation information, to be |
| passed to SWAP. PLABEL is a pointer to the current label in a |
| sorted list of labels; LABEL_END is the end of the list. START and |
| STOP are the range of memory to examine. If a swap is made, |
| *PSWAPPED is set to TRUE. */ |
| |
| #ifdef COFF_WITH_PE |
| static |
| #endif |
| bool |
| _bfd_sh_align_load_span (bfd *abfd, |
| asection *sec, |
| bfd_byte *contents, |
| bool (*swap) (bfd *, asection *, void *, bfd_byte *, bfd_vma), |
| void * relocs, |
| bfd_vma **plabel, |
| bfd_vma *label_end, |
| bfd_vma start, |
| bfd_vma stop, |
| bool *pswapped) |
| { |
| int dsp = (abfd->arch_info->mach == bfd_mach_sh_dsp |
| || abfd->arch_info->mach == bfd_mach_sh3_dsp); |
| bfd_vma i; |
| |
| /* The SH4 has a Harvard architecture, hence aligning loads is not |
| desirable. In fact, it is counter-productive, since it interferes |
| with the schedules generated by the compiler. */ |
| if (abfd->arch_info->mach == bfd_mach_sh4) |
| return true; |
| |
| /* If we are linking sh[3]-dsp code, swap the FPU instructions for DSP |
| instructions. */ |
| if (dsp) |
| { |
| sh_opcodes[0xf].minor_opcodes = sh_dsp_opcodef; |
| sh_opcodes[0xf].count = sizeof sh_dsp_opcodef / sizeof sh_dsp_opcodef [0]; |
| } |
| |
| /* Instructions should be aligned on 2 byte boundaries. */ |
| if ((start & 1) == 1) |
| ++start; |
| |
| /* Now look through the unaligned addresses. */ |
| i = start; |
| if ((i & 2) == 0) |
| i += 2; |
| for (; i < stop; i += 4) |
| { |
| unsigned int insn; |
| const struct sh_opcode *op; |
| unsigned int prev_insn = 0; |
| const struct sh_opcode *prev_op = NULL; |
| |
| insn = bfd_get_16 (abfd, contents + i); |
| op = sh_insn_info (insn); |
| if (op == NULL |
| || (op->flags & (LOAD | STORE)) == 0) |
| continue; |
| |
| /* This is a load or store which is not on a four byte boundary. */ |
| |
| while (*plabel < label_end && **plabel < i) |
| ++*plabel; |
| |
| if (i > start) |
| { |
| prev_insn = bfd_get_16 (abfd, contents + i - 2); |
| /* If INSN is the field b of a parallel processing insn, it is not |
| a load / store after all. Note that the test here might mistake |
| the field_b of a pcopy insn for the starting code of a parallel |
| processing insn; this might miss a swapping opportunity, but at |
| least we're on the safe side. */ |
| if (dsp && (prev_insn & 0xfc00) == 0xf800) |
| continue; |
| |
| /* Check if prev_insn is actually the field b of a parallel |
| processing insn. Again, this can give a spurious match |
| after a pcopy. */ |
| if (dsp && i - 2 > start) |
| { |
| unsigned pprev_insn = bfd_get_16 (abfd, contents + i - 4); |
| |
| if ((pprev_insn & 0xfc00) == 0xf800) |
| prev_op = NULL; |
| else |
| prev_op = sh_insn_info (prev_insn); |
| } |
| else |
| prev_op = sh_insn_info (prev_insn); |
| |
| /* If the load/store instruction is in a delay slot, we |
| can't swap. */ |
| if (prev_op == NULL |
| || (prev_op->flags & DELAY) != 0) |
| continue; |
| } |
| if (i > start |
| && (*plabel >= label_end || **plabel != i) |
| && prev_op != NULL |
| && (prev_op->flags & (LOAD | STORE)) == 0 |
| && ! sh_insns_conflict (prev_insn, prev_op, insn, op)) |
| { |
| bool ok; |
| |
| /* The load/store instruction does not have a label, and |
| there is a previous instruction; PREV_INSN is not |
| itself a load/store instruction, and PREV_INSN and |
| INSN do not conflict. */ |
| |
| ok = true; |
| |
| if (i >= start + 4) |
| { |
| unsigned int prev2_insn; |
| const struct sh_opcode *prev2_op; |
| |
| prev2_insn = bfd_get_16 (abfd, contents + i - 4); |
| prev2_op = sh_insn_info (prev2_insn); |
| |
| /* If the instruction before PREV_INSN has a delay |
| slot--that is, PREV_INSN is in a delay slot--we |
| can not swap. */ |
| if (prev2_op == NULL |
| || (prev2_op->flags & DELAY) != 0) |
| ok = false; |
| |
| /* If the instruction before PREV_INSN is a load, |
| and it sets a register which INSN uses, then |
| putting INSN immediately after PREV_INSN will |
| cause a pipeline bubble, so there is no point to |
| making the swap. */ |
| if (ok |
| && (prev2_op->flags & LOAD) != 0 |
| && sh_load_use (prev2_insn, prev2_op, insn, op)) |
| ok = false; |
| } |
| |
| if (ok) |
| { |
| if (! (*swap) (abfd, sec, relocs, contents, i - 2)) |
| return false; |
| *pswapped = true; |
| continue; |
| } |
| } |
| |
| while (*plabel < label_end && **plabel < i + 2) |
| ++*plabel; |
| |
| if (i + 2 < stop |
| && (*plabel >= label_end || **plabel != i + 2)) |
| { |
| unsigned int next_insn; |
| const struct sh_opcode *next_op; |
| |
| /* There is an instruction after the load/store |
| instruction, and it does not have a label. */ |
| next_insn = bfd_get_16 (abfd, contents + i + 2); |
| next_op = sh_insn_info (next_insn); |
| if (next_op != NULL |
| && (next_op->flags & (LOAD | STORE)) == 0 |
| && ! sh_insns_conflict (insn, op, next_insn, next_op)) |
| { |
| bool ok; |
| |
| /* NEXT_INSN is not itself a load/store instruction, |
| and it does not conflict with INSN. */ |
| |
| ok = true; |
| |
| /* If PREV_INSN is a load, and it sets a register |
| which NEXT_INSN uses, then putting NEXT_INSN |
| immediately after PREV_INSN will cause a pipeline |
| bubble, so there is no reason to make this swap. */ |
| if (prev_op != NULL |
| && (prev_op->flags & LOAD) != 0 |
| && sh_load_use (prev_insn, prev_op, next_insn, next_op)) |
| ok = false; |
| |
| /* If INSN is a load, and it sets a register which |
| the insn after NEXT_INSN uses, then doing the |
| swap will cause a pipeline bubble, so there is no |
| reason to make the swap. However, if the insn |
| after NEXT_INSN is itself a load or store |
| instruction, then it is misaligned, so |
| optimistically hope that it will be swapped |
| itself, and just live with the pipeline bubble if |
| it isn't. */ |
| if (ok |
| && i + 4 < stop |
| && (op->flags & LOAD) != 0) |
| { |
| unsigned int next2_insn; |
| const struct sh_opcode *next2_op; |
| |
| next2_insn = bfd_get_16 (abfd, contents + i + 4); |
| next2_op = sh_insn_info (next2_insn); |
| if (next2_op == NULL |
| || ((next2_op->flags & (LOAD | STORE)) == 0 |
| && sh_load_use (insn, op, next2_insn, next2_op))) |
| ok = false; |
| } |
| |
| if (ok) |
| { |
| if (! (*swap) (abfd, sec, relocs, contents, i)) |
| return false; |
| *pswapped = true; |
| continue; |
| } |
| } |
| } |
| } |
| |
| return true; |
| } |
| #endif /* not COFF_IMAGE_WITH_PE */ |
| |
| /* Swap two SH instructions. */ |
| |
| static bool |
| sh_swap_insns (bfd * abfd, |
| asection * sec, |
| void * relocs, |
| bfd_byte * contents, |
| bfd_vma addr) |
| { |
| struct internal_reloc *internal_relocs = (struct internal_reloc *) relocs; |
| unsigned short i1, i2; |
| struct internal_reloc *irel, *irelend; |
| |
| /* Swap the instructions themselves. */ |
| i1 = bfd_get_16 (abfd, contents + addr); |
| i2 = bfd_get_16 (abfd, contents + addr + 2); |
| bfd_put_16 (abfd, (bfd_vma) i2, contents + addr); |
| bfd_put_16 (abfd, (bfd_vma) i1, contents + addr + 2); |
| |
| /* Adjust all reloc addresses. */ |
| irelend = internal_relocs + sec->reloc_count; |
| for (irel = internal_relocs; irel < irelend; irel++) |
| { |
| int type, add; |
| |
| /* There are a few special types of relocs that we don't want to |
| adjust. These relocs do not apply to the instruction itself, |
| but are only associated with the address. */ |
| type = irel->r_type; |
| if (type == R_SH_ALIGN |
| || type == R_SH_CODE |
| || type == R_SH_DATA |
| || type == R_SH_LABEL) |
| continue; |
| |
| /* If an R_SH_USES reloc points to one of the addresses being |
| swapped, we must adjust it. It would be incorrect to do this |
| for a jump, though, since we want to execute both |
| instructions after the jump. (We have avoided swapping |
| around a label, so the jump will not wind up executing an |
| instruction it shouldn't). */ |
| if (type == R_SH_USES) |
| { |
| bfd_vma off; |
| |
| off = irel->r_vaddr - sec->vma + 4 + irel->r_offset; |
| if (off == addr) |
| irel->r_offset += 2; |
| else if (off == addr + 2) |
| irel->r_offset -= 2; |
| } |
| |
| if (irel->r_vaddr - sec->vma == addr) |
| { |
| irel->r_vaddr += 2; |
| add = -2; |
| } |
| else if (irel->r_vaddr - sec->vma == addr + 2) |
| { |
| irel->r_vaddr -= 2; |
| add = 2; |
| } |
| else |
| add = 0; |
| |
| if (add != 0) |
| { |
| bfd_byte *loc; |
| unsigned short insn, oinsn; |
| bool overflow; |
| |
| loc = contents + irel->r_vaddr - sec->vma; |
| overflow = false; |
| switch (type) |
| { |
| default: |
| break; |
| |
| case R_SH_PCDISP8BY2: |
| case R_SH_PCRELIMM8BY2: |
| insn = bfd_get_16 (abfd, loc); |
| oinsn = insn; |
| insn += add / 2; |
| if ((oinsn & 0xff00) != (insn & 0xff00)) |
| overflow = true; |
| bfd_put_16 (abfd, (bfd_vma) insn, loc); |
| break; |
| |
| case R_SH_PCDISP: |
| insn = bfd_get_16 (abfd, loc); |
| oinsn = insn; |
| insn += add / 2; |
| if ((oinsn & 0xf000) != (insn & 0xf000)) |
| overflow = true; |
| bfd_put_16 (abfd, (bfd_vma) insn, loc); |
| break; |
| |
| case R_SH_PCRELIMM8BY4: |
| /* This reloc ignores the least significant 3 bits of |
| the program counter before adding in the offset. |
| This means that if ADDR is at an even address, the |
| swap will not affect the offset. If ADDR is an at an |
| odd address, then the instruction will be crossing a |
| four byte boundary, and must be adjusted. */ |
| if ((addr & 3) != 0) |
| { |
| insn = bfd_get_16 (abfd, loc); |
| oinsn = insn; |
| insn += add / 2; |
| if ((oinsn & 0xff00) != (insn & 0xff00)) |
| overflow = true; |
| bfd_put_16 (abfd, (bfd_vma) insn, loc); |
| } |
| |
| break; |
| } |
| |
| if (overflow) |
| { |
| _bfd_error_handler |
| /* xgettext: c-format */ |
| (_("%pB: %#" PRIx64 ": fatal: reloc overflow while relaxing"), |
| abfd, (uint64_t) irel->r_vaddr); |
| bfd_set_error (bfd_error_bad_value); |
| return false; |
| } |
| } |
| } |
| |
| return true; |
| } |
| |
| /* Look for loads and stores which we can align to four byte |
| boundaries. See the longer comment above sh_relax_section for why |
| this is desirable. This sets *PSWAPPED if some instruction was |
| swapped. */ |
| |
| static bool |
| sh_align_loads (bfd *abfd, |
| asection *sec, |
| struct internal_reloc *internal_relocs, |
| bfd_byte *contents, |
| bool *pswapped) |
| { |
| struct internal_reloc *irel, *irelend; |
| bfd_vma *labels = NULL; |
| bfd_vma *label, *label_end; |
| bfd_size_type amt; |
| |
| *pswapped = false; |
| |
| irelend = internal_relocs + sec->reloc_count; |
| |
| /* Get all the addresses with labels on them. */ |
| amt = (bfd_size_type) sec->reloc_count * sizeof (bfd_vma); |
| labels = (bfd_vma *) bfd_malloc (amt); |
| if (labels == NULL) |
| goto error_return; |
| label_end = labels; |
| for (irel = internal_relocs; irel < irelend; irel++) |
| { |
| if (irel->r_type == R_SH_LABEL) |
| { |
| *label_end = irel->r_vaddr - sec->vma; |
| ++label_end; |
| } |
| } |
| |
| /* Note that the assembler currently always outputs relocs in |
| address order. If that ever changes, this code will need to sort |
| the label values and the relocs. */ |
| |
| label = labels; |
| |
| for (irel = internal_relocs; irel < irelend; irel++) |
| { |
| bfd_vma start, stop; |
| |
| if (irel->r_type != R_SH_CODE) |
| continue; |
| |
| start = irel->r_vaddr - sec->vma; |
| |
| for (irel++; irel < irelend; irel++) |
| if (irel->r_type == R_SH_DATA) |
| break; |
| if (irel < irelend) |
| stop = irel->r_vaddr - sec->vma; |
| else |
| stop = sec->size; |
| |
| if (! _bfd_sh_align_load_span (abfd, sec, contents, sh_swap_insns, |
| internal_relocs, &label, |
| label_end, start, stop, pswapped)) |
| goto error_return; |
| } |
| |
| free (labels); |
| |
| return true; |
| |
| error_return: |
| free (labels); |
| return false; |
| } |
| |
| /* This is a modification of _bfd_coff_generic_relocate_section, which |
| will handle SH relaxing. */ |
| |
| static bool |
| sh_relocate_section (bfd *output_bfd ATTRIBUTE_UNUSED, |
| struct bfd_link_info *info, |
| bfd *input_bfd, |
| asection *input_section, |
| bfd_byte *contents, |
| struct internal_reloc *relocs, |
| struct internal_syment *syms, |
| asection **sections) |
| { |
| struct internal_reloc *rel; |
| struct internal_reloc *relend; |
| |
| rel = relocs; |
| relend = rel + input_section->reloc_count; |
| for (; rel < relend; rel++) |
| { |
| long symndx; |
| struct coff_link_hash_entry *h; |
| struct internal_syment *sym; |
| bfd_vma addend; |
| bfd_vma val; |
| reloc_howto_type *howto; |
| bfd_reloc_status_type rstat; |
| |
| /* Almost all relocs have to do with relaxing. If any work must |
| be done for them, it has been done in sh_relax_section. */ |
| if (rel->r_type != R_SH_IMM32 |
| #ifdef COFF_WITH_PE |
| && rel->r_type != R_SH_IMM32CE |
| && rel->r_type != R_SH_IMAGEBASE |
| #endif |
| && rel->r_type != R_SH_PCDISP) |
| continue; |
| |
| symndx = rel->r_symndx; |
| |
| if (symndx == -1) |
| { |
| h = NULL; |
| sym = NULL; |
| } |
| else |
| { |
| if (symndx < 0 |
| || (unsigned long) symndx >= obj_raw_syment_count (input_bfd)) |
| { |
| _bfd_error_handler |
| /* xgettext: c-format */ |
| (_("%pB: illegal symbol index %ld in relocs"), |
| input_bfd, symndx); |
| bfd_set_error (bfd_error_bad_value); |
| return false; |
| } |
| h = obj_coff_sym_hashes (input_bfd)[symndx]; |
| sym = syms + symndx; |
| } |
| |
| if (sym != NULL && sym->n_scnum != 0) |
| addend = - sym->n_value; |
| else |
| addend = 0; |
| |
| if (rel->r_type == R_SH_PCDISP) |
| addend -= 4; |
| |
| if (rel->r_type >= SH_COFF_HOWTO_COUNT) |
| howto = NULL; |
| else |
| howto = &sh_coff_howtos[rel->r_type]; |
| |
| if (howto == NULL) |
| { |
| bfd_set_error (bfd_error_bad_value); |
| return false; |
| } |
| |
| #ifdef COFF_WITH_PE |
| if (rel->r_type == R_SH_IMAGEBASE) |
| addend -= pe_data (input_section->output_section->owner)->pe_opthdr.ImageBase; |
| #endif |
| |
| val = 0; |
| |
| if (h == NULL) |
| { |
| asection *sec; |
| |
| /* There is nothing to do for an internal PCDISP reloc. */ |
| if (rel->r_type == R_SH_PCDISP) |
| continue; |
| |
| if (symndx == -1) |
| { |
| sec = bfd_abs_section_ptr; |
| val = 0; |
| } |
| else |
| { |
| sec = sections[symndx]; |
| val = (sec->output_section->vma |
| + sec->output_offset |
| + sym->n_value |
| - sec->vma); |
| } |
| } |
| else |
| { |
| if (h->root.type == bfd_link_hash_defined |
| || h->root.type == bfd_link_hash_defweak) |
| { |
| asection *sec; |
| |
| sec = h->root.u.def.section; |
| val = (h->root.u.def.value |
| + sec->output_section->vma |
| + sec->output_offset); |
| } |
| else if (! bfd_link_relocatable (info)) |
| (*info->callbacks->undefined_symbol) |
| (info, h->root.root.string, input_bfd, input_section, |
| rel->r_vaddr - input_section->vma, true); |
| } |
| |
| rstat = _bfd_final_link_relocate (howto, input_bfd, input_section, |
| contents, |
| rel->r_vaddr - input_section->vma, |
| val, addend); |
| |
| switch (rstat) |
| { |
| default: |
| abort (); |
| case bfd_reloc_ok: |
| break; |
| case bfd_reloc_overflow: |
| { |
| const char *name; |
| char buf[SYMNMLEN + 1]; |
| |
| if (symndx == -1) |
| name = "*ABS*"; |
| else if (h != NULL) |
| name = NULL; |
| else if (sym->_n._n_n._n_zeroes == 0 |
| && sym->_n._n_n._n_offset != 0) |
| { |
| if (sym->_n._n_n._n_offset < obj_coff_strings_len (input_bfd)) |
| name = obj_coff_strings (input_bfd) + sym->_n._n_n._n_offset; |
| else |
| name = "?"; |
| } |
| else |
| { |
| strncpy (buf, sym->_n._n_name, SYMNMLEN); |
| buf[SYMNMLEN] = '\0'; |
| name = buf; |
| } |
| |
| (*info->callbacks->reloc_overflow) |
| (info, (h ? &h->root : NULL), name, howto->name, |
| (bfd_vma) 0, input_bfd, input_section, |
| rel->r_vaddr - input_section->vma); |
| } |
| } |
| } |
| |
| return true; |
| } |
| |
| /* This is a version of bfd_generic_get_relocated_section_contents |
| which uses sh_relocate_section. */ |
| |
| static bfd_byte * |
| sh_coff_get_relocated_section_contents (bfd *output_bfd, |
| struct bfd_link_info *link_info, |
| struct bfd_link_order *link_order, |
| bfd_byte *data, |
| bool relocatable, |
| asymbol **symbols) |
| { |
| asection *input_section = link_order->u.indirect.section; |
| bfd *input_bfd = input_section->owner; |
| asection **sections = NULL; |
| struct internal_reloc *internal_relocs = NULL; |
| struct internal_syment *internal_syms = NULL; |
| |
| /* We only need to handle the case of relaxing, or of having a |
| particular set of section contents, specially. */ |
| if (relocatable |
| || coff_section_data (input_bfd, input_section) == NULL |
| || coff_section_data (input_bfd, input_section)->contents == NULL) |
| return bfd_generic_get_relocated_section_contents (output_bfd, link_info, |
| link_order, data, |
| relocatable, |
| symbols); |
| |
| bfd_byte *orig_data = data; |
| if (data == NULL) |
| { |
| data = bfd_malloc (input_section->size); |
| if (data == NULL) |
| return NULL; |
| } |
| memcpy (data, coff_section_data (input_bfd, input_section)->contents, |
| (size_t) input_section->size); |
| |
| if ((input_section->flags & SEC_RELOC) != 0 |
| && input_section->reloc_count > 0) |
| { |
| bfd_size_type symesz = bfd_coff_symesz (input_bfd); |
| bfd_byte *esym, *esymend; |
| struct internal_syment *isymp; |
| asection **secpp; |
| bfd_size_type amt; |
| |
| if (! _bfd_coff_get_external_symbols (input_bfd)) |
| goto error_return; |
| |
| internal_relocs = (_bfd_coff_read_internal_relocs |
| (input_bfd, input_section, false, (bfd_byte *) NULL, |
| false, (struct internal_reloc *) NULL)); |
| if (internal_relocs == NULL) |
| goto error_return; |
| |
| amt = obj_raw_syment_count (input_bfd); |
| amt *= sizeof (struct internal_syment); |
| internal_syms = (struct internal_syment *) bfd_malloc (amt); |
| if (internal_syms == NULL) |
| goto error_return; |
| |
| amt = obj_raw_syment_count (input_bfd); |
| amt *= sizeof (asection *); |
| sections = (asection **) bfd_malloc (amt); |
| if (sections == NULL) |
| goto error_return; |
| |
| isymp = internal_syms; |
| secpp = sections; |
| esym = (bfd_byte *) obj_coff_external_syms (input_bfd); |
| esymend = esym + obj_raw_syment_count (input_bfd) * symesz; |
| while (esym < esymend) |
| { |
| bfd_coff_swap_sym_in (input_bfd, esym, isymp); |
| |
| if (isymp->n_scnum != 0) |
| *secpp = coff_section_from_bfd_index (input_bfd, isymp->n_scnum); |
| else |
| { |
| if (isymp->n_value == 0) |
| *secpp = bfd_und_section_ptr; |
| else |
| *secpp = bfd_com_section_ptr; |
| } |
| |
| esym += (isymp->n_numaux + 1) * symesz; |
| secpp += isymp->n_numaux + 1; |
| isymp += isymp->n_numaux + 1; |
| } |
| |
| if (! sh_relocate_section (output_bfd, link_info, input_bfd, |
| input_section, data, internal_relocs, |
| internal_syms, sections)) |
| goto error_return; |
| |
| free (sections); |
| sections = NULL; |
| free (internal_syms); |
| internal_syms = NULL; |
| free (internal_relocs); |
| internal_relocs = NULL; |
| } |
| |
| return data; |
| |
| error_return: |
| free (internal_relocs); |
| free (internal_syms); |
| free (sections); |
| if (orig_data == NULL) |
| free (data); |
| return NULL; |
| } |
| |
| /* The target vectors. */ |
| |
| #ifndef TARGET_SHL_SYM |
| CREATE_BIG_COFF_TARGET_VEC (sh_coff_vec, "coff-sh", BFD_IS_RELAXABLE, 0, '_', NULL, COFF_SWAP_TABLE) |
| #endif |
| |
| #ifdef TARGET_SHL_SYM |
| #define TARGET_SYM TARGET_SHL_SYM |
| #else |
|