diff options
Diffstat (limited to 'binutils-2.24/bfd/elf32-rl78.c')
| -rw-r--r-- | binutils-2.24/bfd/elf32-rl78.c | 2520 |
1 files changed, 0 insertions, 2520 deletions
diff --git a/binutils-2.24/bfd/elf32-rl78.c b/binutils-2.24/bfd/elf32-rl78.c deleted file mode 100644 index d18cc184..00000000 --- a/binutils-2.24/bfd/elf32-rl78.c +++ /dev/null @@ -1,2520 +0,0 @@ -/* Renesas RL78 specific support for 32-bit ELF. - Copyright (C) 2011-2013 Free Software Foundation, Inc. - - This file is part of BFD, the Binary File Descriptor library. - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 3 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ - -#include "sysdep.h" -#include "bfd.h" -#include "bfd_stdint.h" -#include "libbfd.h" -#include "elf-bfd.h" -#include "elf/rl78.h" -#include "libiberty.h" - -#define valid_16bit_address(v) ((v) <= 0x0ffff || (v) >= 0xf0000) - -#define RL78REL(n,sz,bit,shift,complain,pcrel) \ - HOWTO (R_RL78_##n, shift, sz, bit, pcrel, 0, complain_overflow_ ## complain, \ - bfd_elf_generic_reloc, "R_RL78_" #n, FALSE, 0, ~0, FALSE) - -/* Note that the relocations around 0x7f are internal to this file; - feel free to move them as needed to avoid conflicts with published - relocation numbers. */ - -static reloc_howto_type rl78_elf_howto_table [] = -{ - RL78REL (NONE, 0, 0, 0, dont, FALSE), - RL78REL (DIR32, 2, 32, 0, signed, FALSE), - RL78REL (DIR24S, 2, 24, 0, signed, FALSE), - RL78REL (DIR16, 1, 16, 0, dont, FALSE), - RL78REL (DIR16U, 1, 16, 0, unsigned, FALSE), - RL78REL (DIR16S, 1, 16, 0, signed, FALSE), - RL78REL (DIR8, 0, 8, 0, dont, FALSE), - RL78REL (DIR8U, 0, 8, 0, unsigned, FALSE), - RL78REL (DIR8S, 0, 8, 0, signed, FALSE), - RL78REL (DIR24S_PCREL, 2, 24, 0, signed, TRUE), - RL78REL (DIR16S_PCREL, 1, 16, 0, signed, TRUE), - RL78REL (DIR8S_PCREL, 0, 8, 0, signed, TRUE), - RL78REL (DIR16UL, 1, 16, 2, unsigned, FALSE), - RL78REL (DIR16UW, 1, 16, 1, unsigned, FALSE), - RL78REL (DIR8UL, 0, 8, 2, unsigned, FALSE), - RL78REL (DIR8UW, 0, 8, 1, unsigned, FALSE), - RL78REL (DIR32_REV, 1, 16, 0, dont, FALSE), - RL78REL (DIR16_REV, 1, 16, 0, dont, FALSE), - RL78REL (DIR3U_PCREL, 0, 3, 0, dont, TRUE), - - EMPTY_HOWTO (0x13), - EMPTY_HOWTO (0x14), - EMPTY_HOWTO (0x15), - EMPTY_HOWTO (0x16), - EMPTY_HOWTO (0x17), - EMPTY_HOWTO (0x18), - EMPTY_HOWTO (0x19), - EMPTY_HOWTO (0x1a), - EMPTY_HOWTO (0x1b), - EMPTY_HOWTO (0x1c), - EMPTY_HOWTO (0x1d), - EMPTY_HOWTO (0x1e), - EMPTY_HOWTO (0x1f), - - EMPTY_HOWTO (0x20), - EMPTY_HOWTO (0x21), - EMPTY_HOWTO (0x22), - EMPTY_HOWTO (0x23), - EMPTY_HOWTO (0x24), - EMPTY_HOWTO (0x25), - EMPTY_HOWTO (0x26), - EMPTY_HOWTO (0x27), - EMPTY_HOWTO (0x28), - EMPTY_HOWTO (0x29), - EMPTY_HOWTO (0x2a), - EMPTY_HOWTO (0x2b), - EMPTY_HOWTO (0x2c), - RL78REL (RH_RELAX, 0, 0, 0, dont, FALSE), - - EMPTY_HOWTO (0x2e), - EMPTY_HOWTO (0x2f), - EMPTY_HOWTO (0x30), - EMPTY_HOWTO (0x31), - EMPTY_HOWTO (0x32), - EMPTY_HOWTO (0x33), - EMPTY_HOWTO (0x34), - EMPTY_HOWTO (0x35), - EMPTY_HOWTO (0x36), - EMPTY_HOWTO (0x37), - EMPTY_HOWTO (0x38), - EMPTY_HOWTO (0x39), - EMPTY_HOWTO (0x3a), - EMPTY_HOWTO (0x3b), - EMPTY_HOWTO (0x3c), - EMPTY_HOWTO (0x3d), - EMPTY_HOWTO (0x3e), - EMPTY_HOWTO (0x3f), - EMPTY_HOWTO (0x40), - - RL78REL (ABS32, 2, 32, 0, dont, FALSE), - RL78REL (ABS24S, 2, 24, 0, signed, FALSE), - RL78REL (ABS16, 1, 16, 0, dont, FALSE), - RL78REL (ABS16U, 1, 16, 0, unsigned, FALSE), - RL78REL (ABS16S, 1, 16, 0, signed, FALSE), - RL78REL (ABS8, 0, 8, 0, dont, FALSE), - RL78REL (ABS8U, 0, 8, 0, unsigned, FALSE), - RL78REL (ABS8S, 0, 8, 0, signed, FALSE), - RL78REL (ABS24S_PCREL, 2, 24, 0, signed, TRUE), - RL78REL (ABS16S_PCREL, 1, 16, 0, signed, TRUE), - RL78REL (ABS8S_PCREL, 0, 8, 0, signed, TRUE), - RL78REL (ABS16UL, 1, 16, 0, unsigned, FALSE), - RL78REL (ABS16UW, 1, 16, 0, unsigned, FALSE), - RL78REL (ABS8UL, 0, 8, 0, unsigned, FALSE), - RL78REL (ABS8UW, 0, 8, 0, unsigned, FALSE), - RL78REL (ABS32_REV, 2, 32, 0, dont, FALSE), - RL78REL (ABS16_REV, 1, 16, 0, dont, FALSE), - -#define STACK_REL_P(x) ((x) <= R_RL78_ABS16_REV && (x) >= R_RL78_ABS32) - - EMPTY_HOWTO (0x52), - EMPTY_HOWTO (0x53), - EMPTY_HOWTO (0x54), - EMPTY_HOWTO (0x55), - EMPTY_HOWTO (0x56), - EMPTY_HOWTO (0x57), - EMPTY_HOWTO (0x58), - EMPTY_HOWTO (0x59), - EMPTY_HOWTO (0x5a), - EMPTY_HOWTO (0x5b), - EMPTY_HOWTO (0x5c), - EMPTY_HOWTO (0x5d), - EMPTY_HOWTO (0x5e), - EMPTY_HOWTO (0x5f), - EMPTY_HOWTO (0x60), - EMPTY_HOWTO (0x61), - EMPTY_HOWTO (0x62), - EMPTY_HOWTO (0x63), - EMPTY_HOWTO (0x64), - EMPTY_HOWTO (0x65), - EMPTY_HOWTO (0x66), - EMPTY_HOWTO (0x67), - EMPTY_HOWTO (0x68), - EMPTY_HOWTO (0x69), - EMPTY_HOWTO (0x6a), - EMPTY_HOWTO (0x6b), - EMPTY_HOWTO (0x6c), - EMPTY_HOWTO (0x6d), - EMPTY_HOWTO (0x6e), - EMPTY_HOWTO (0x6f), - EMPTY_HOWTO (0x70), - EMPTY_HOWTO (0x71), - EMPTY_HOWTO (0x72), - EMPTY_HOWTO (0x73), - EMPTY_HOWTO (0x74), - EMPTY_HOWTO (0x75), - EMPTY_HOWTO (0x76), - EMPTY_HOWTO (0x77), - - EMPTY_HOWTO (0x78), - EMPTY_HOWTO (0x79), - EMPTY_HOWTO (0x7a), - EMPTY_HOWTO (0x7b), - EMPTY_HOWTO (0x7c), - EMPTY_HOWTO (0x7d), - EMPTY_HOWTO (0x7e), - EMPTY_HOWTO (0x7f), - - RL78REL (SYM, 2, 32, 0, dont, FALSE), - RL78REL (OPneg, 2, 32, 0, dont, FALSE), - RL78REL (OPadd, 2, 32, 0, dont, FALSE), - RL78REL (OPsub, 2, 32, 0, dont, FALSE), - RL78REL (OPmul, 2, 32, 0, dont, FALSE), - RL78REL (OPdiv, 2, 32, 0, dont, FALSE), - RL78REL (OPshla, 2, 32, 0, dont, FALSE), - RL78REL (OPshra, 2, 32, 0, dont, FALSE), - RL78REL (OPsctsize, 2, 32, 0, dont, FALSE), - EMPTY_HOWTO (0x89), - EMPTY_HOWTO (0x8a), - EMPTY_HOWTO (0x8b), - EMPTY_HOWTO (0x8c), - RL78REL (OPscttop, 2, 32, 0, dont, FALSE), - EMPTY_HOWTO (0x8e), - EMPTY_HOWTO (0x8f), - RL78REL (OPand, 2, 32, 0, dont, FALSE), - RL78REL (OPor, 2, 32, 0, dont, FALSE), - RL78REL (OPxor, 2, 32, 0, dont, FALSE), - RL78REL (OPnot, 2, 32, 0, dont, FALSE), - RL78REL (OPmod, 2, 32, 0, dont, FALSE), - RL78REL (OPromtop, 2, 32, 0, dont, FALSE), - RL78REL (OPramtop, 2, 32, 0, dont, FALSE) -}; - -/* Map BFD reloc types to RL78 ELF reloc types. */ - -struct rl78_reloc_map -{ - bfd_reloc_code_real_type bfd_reloc_val; - unsigned int rl78_reloc_val; -}; - -static const struct rl78_reloc_map rl78_reloc_map [] = -{ - { BFD_RELOC_NONE, R_RL78_NONE }, - { BFD_RELOC_8, R_RL78_DIR8S }, - { BFD_RELOC_16, R_RL78_DIR16S }, - { BFD_RELOC_24, R_RL78_DIR24S }, - { BFD_RELOC_32, R_RL78_DIR32 }, - { BFD_RELOC_RL78_16_OP, R_RL78_DIR16 }, - { BFD_RELOC_RL78_DIR3U_PCREL, R_RL78_DIR3U_PCREL }, - { BFD_RELOC_8_PCREL, R_RL78_DIR8S_PCREL }, - { BFD_RELOC_16_PCREL, R_RL78_DIR16S_PCREL }, - { BFD_RELOC_24_PCREL, R_RL78_DIR24S_PCREL }, - { BFD_RELOC_RL78_8U, R_RL78_DIR8U }, - { BFD_RELOC_RL78_16U, R_RL78_DIR16U }, - { BFD_RELOC_RL78_SYM, R_RL78_SYM }, - { BFD_RELOC_RL78_OP_SUBTRACT, R_RL78_OPsub }, - { BFD_RELOC_RL78_OP_NEG, R_RL78_OPneg }, - { BFD_RELOC_RL78_OP_AND, R_RL78_OPand }, - { BFD_RELOC_RL78_OP_SHRA, R_RL78_OPshra }, - { BFD_RELOC_RL78_ABS8, R_RL78_ABS8 }, - { BFD_RELOC_RL78_ABS16, R_RL78_ABS16 }, - { BFD_RELOC_RL78_ABS16_REV, R_RL78_ABS16_REV }, - { BFD_RELOC_RL78_ABS32, R_RL78_ABS32 }, - { BFD_RELOC_RL78_ABS32_REV, R_RL78_ABS32_REV }, - { BFD_RELOC_RL78_ABS16UL, R_RL78_ABS16UL }, - { BFD_RELOC_RL78_ABS16UW, R_RL78_ABS16UW }, - { BFD_RELOC_RL78_ABS16U, R_RL78_ABS16U }, - { BFD_RELOC_RL78_RELAX, R_RL78_RH_RELAX } -}; - -static reloc_howto_type * -rl78_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED, - bfd_reloc_code_real_type code) -{ - unsigned int i; - - if (code == BFD_RELOC_RL78_32_OP) - return rl78_elf_howto_table + R_RL78_DIR32; - - for (i = ARRAY_SIZE (rl78_reloc_map); --i;) - if (rl78_reloc_map [i].bfd_reloc_val == code) - return rl78_elf_howto_table + rl78_reloc_map[i].rl78_reloc_val; - - return NULL; -} - -static reloc_howto_type * -rl78_reloc_name_lookup (bfd * abfd ATTRIBUTE_UNUSED, const char * r_name) -{ - unsigned int i; - - for (i = 0; i < ARRAY_SIZE (rl78_elf_howto_table); i++) - if (rl78_elf_howto_table[i].name != NULL - && strcasecmp (rl78_elf_howto_table[i].name, r_name) == 0) - return rl78_elf_howto_table + i; - - return NULL; -} - -/* Set the howto pointer for an RL78 ELF reloc. */ - -static void -rl78_info_to_howto_rela (bfd * abfd ATTRIBUTE_UNUSED, - arelent * cache_ptr, - Elf_Internal_Rela * dst) -{ - unsigned int r_type; - - r_type = ELF32_R_TYPE (dst->r_info); - BFD_ASSERT (r_type < (unsigned int) R_RL78_max); - cache_ptr->howto = rl78_elf_howto_table + r_type; -} - -static bfd_vma -get_symbol_value (const char * name, - bfd_reloc_status_type * status, - struct bfd_link_info * info, - bfd * input_bfd, - asection * input_section, - int offset) -{ - bfd_vma value = 0; - struct bfd_link_hash_entry * h; - - h = bfd_link_hash_lookup (info->hash, name, FALSE, FALSE, TRUE); - - if (h == NULL - || (h->type != bfd_link_hash_defined - && h->type != bfd_link_hash_defweak)) - * status = info->callbacks->undefined_symbol - (info, name, input_bfd, input_section, offset, TRUE); - else - value = (h->u.def.value - + h->u.def.section->output_section->vma - + h->u.def.section->output_offset); - - return value; -} - -static bfd_vma -get_romstart (bfd_reloc_status_type * status, - struct bfd_link_info * info, - bfd * abfd, - asection * sec, - int offset) -{ - static bfd_boolean cached = FALSE; - static bfd_vma cached_value = 0; - - if (!cached) - { - cached_value = get_symbol_value ("_start", status, info, abfd, sec, offset); - cached = TRUE; - } - return cached_value; -} - -static bfd_vma -get_ramstart (bfd_reloc_status_type * status, - struct bfd_link_info * info, - bfd * abfd, - asection * sec, - int offset) -{ - static bfd_boolean cached = FALSE; - static bfd_vma cached_value = 0; - - if (!cached) - { - cached_value = get_symbol_value ("__datastart", status, info, abfd, sec, offset); - cached = TRUE; - } - return cached_value; -} - -#define NUM_STACK_ENTRIES 16 -static int32_t rl78_stack [ NUM_STACK_ENTRIES ]; -static unsigned int rl78_stack_top; - -#define RL78_STACK_PUSH(val) \ - do \ - { \ - if (rl78_stack_top < NUM_STACK_ENTRIES) \ - rl78_stack [rl78_stack_top ++] = (val); \ - else \ - r = bfd_reloc_dangerous; \ - } \ - while (0) - -#define RL78_STACK_POP(dest) \ - do \ - { \ - if (rl78_stack_top > 0) \ - (dest) = rl78_stack [-- rl78_stack_top]; \ - else \ - (dest) = 0, r = bfd_reloc_dangerous; \ - } \ - while (0) - -/* Relocate an RL78 ELF section. - There is some attempt to make this function usable for many architectures, - both USE_REL and USE_RELA ['twould be nice if such a critter existed], - if only to serve as a learning tool. - - The RELOCATE_SECTION function is called by the new ELF backend linker - to handle the relocations for a section. - - The relocs are always passed as Rela structures; if the section - actually uses Rel structures, the r_addend field will always be - zero. - - This function is responsible for adjusting the section contents as - necessary, and (if using Rela relocs and generating a relocatable - output file) adjusting the reloc addend as necessary. - - This function does not have to worry about setting the reloc - address or the reloc symbol index. - - LOCAL_SYMS is a pointer to the swapped in local symbols. - - LOCAL_SECTIONS is an array giving the section in the input file - corresponding to the st_shndx field of each local symbol. - - The global hash table entry for the global symbols can be found - via elf_sym_hashes (input_bfd). - - When generating relocatable output, this function must handle - STB_LOCAL/STT_SECTION symbols specially. The output symbol is - going to be the section symbol corresponding to the output - section, which means that the addend must be adjusted - accordingly. */ - -static bfd_boolean -rl78_elf_relocate_section - (bfd * output_bfd, - struct bfd_link_info * info, - bfd * input_bfd, - asection * input_section, - bfd_byte * contents, - Elf_Internal_Rela * relocs, - Elf_Internal_Sym * local_syms, - asection ** local_sections) -{ - Elf_Internal_Shdr * symtab_hdr; - struct elf_link_hash_entry ** sym_hashes; - Elf_Internal_Rela * rel; - Elf_Internal_Rela * relend; - bfd *dynobj; - asection *splt; - - symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; - sym_hashes = elf_sym_hashes (input_bfd); - relend = relocs + input_section->reloc_count; - - dynobj = elf_hash_table (info)->dynobj; - splt = NULL; - if (dynobj != NULL) - splt = bfd_get_linker_section (dynobj, ".plt"); - - for (rel = relocs; rel < relend; rel ++) - { - reloc_howto_type * howto; - unsigned long r_symndx; - Elf_Internal_Sym * sym; - asection * sec; - struct elf_link_hash_entry * h; - bfd_vma relocation; - bfd_reloc_status_type r; - const char * name = NULL; - bfd_boolean unresolved_reloc = TRUE; - int r_type; - - r_type = ELF32_R_TYPE (rel->r_info); - r_symndx = ELF32_R_SYM (rel->r_info); - - howto = rl78_elf_howto_table + ELF32_R_TYPE (rel->r_info); - h = NULL; - sym = NULL; - sec = NULL; - relocation = 0; - - if (r_symndx < symtab_hdr->sh_info) - { - sym = local_syms + r_symndx; - sec = local_sections [r_symndx]; - relocation = _bfd_elf_rela_local_sym (output_bfd, sym, & sec, rel); - - name = bfd_elf_string_from_elf_section - (input_bfd, symtab_hdr->sh_link, sym->st_name); - name = (sym->st_name == 0) ? bfd_section_name (input_bfd, sec) : name; - } - else - { - bfd_boolean warned; - - RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, - r_symndx, symtab_hdr, sym_hashes, h, - sec, relocation, unresolved_reloc, - warned); - - name = h->root.root.string; - } - - if (sec != NULL && discarded_section (sec)) - RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, - rel, 1, relend, howto, 0, contents); - - if (info->relocatable) - { - /* This is a relocatable 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. */ - if (sym != NULL && ELF_ST_TYPE (sym->st_info) == STT_SECTION) - rel->r_addend += sec->output_offset; - continue; - } - - switch (ELF32_R_TYPE (rel->r_info)) - { - case R_RL78_DIR16S: - { - bfd_vma *plt_offset; - - if (h != NULL) - plt_offset = &h->plt.offset; - else - plt_offset = elf_local_got_offsets (input_bfd) + r_symndx; - - if (! valid_16bit_address (relocation)) - { - /* If this is the first time we've processed this symbol, - fill in the plt entry with the correct symbol address. */ - if ((*plt_offset & 1) == 0) - { - unsigned int x; - - x = 0x000000ec; /* br !!abs24 */ - x |= (relocation << 8) & 0xffffff00; - bfd_put_32 (input_bfd, x, splt->contents + *plt_offset); - *plt_offset |= 1; - } - - relocation = (splt->output_section->vma - + splt->output_offset - + (*plt_offset & -2)); - if (name) - { - char *newname = bfd_malloc (strlen(name)+5); - strcpy (newname, name); - strcat(newname, ".plt"); - _bfd_generic_link_add_one_symbol (info, - input_bfd, - newname, - BSF_FUNCTION | BSF_WEAK, - splt, - (*plt_offset & -2), - 0, - 1, - 0, - 0); - } - } - } - break; - } - - if (h != NULL && h->root.type == bfd_link_hash_undefweak) - /* If the symbol is undefined and weak - then the relocation resolves to zero. */ - relocation = 0; - else - { - if (howto->pc_relative) - { - relocation -= (input_section->output_section->vma - + input_section->output_offset - + rel->r_offset); - relocation -= bfd_get_reloc_size (howto); - } - - relocation += rel->r_addend; - } - - r = bfd_reloc_ok; - -#define RANGE(a,b) if (a > (long) relocation || (long) relocation > b) r = bfd_reloc_overflow -#define ALIGN(m) if (relocation & m) r = bfd_reloc_other; -#define OP(i) (contents[rel->r_offset + (i)]) - - /* Opcode relocs are always big endian. Data relocs are bi-endian. */ - switch (r_type) - { - case R_RL78_NONE: - break; - - case R_RL78_RH_RELAX: - break; - - case R_RL78_DIR8S_PCREL: - RANGE (-128, 127); - OP (0) = relocation; - break; - - case R_RL78_DIR8S: - RANGE (-128, 255); - OP (0) = relocation; - break; - - case R_RL78_DIR8U: - RANGE (0, 255); - OP (0) = relocation; - break; - - case R_RL78_DIR16S_PCREL: - RANGE (-32768, 32767); - OP (0) = relocation; - OP (1) = relocation >> 8; - break; - - case R_RL78_DIR16S: - if ((relocation & 0xf0000) == 0xf0000) - relocation &= 0xffff; - RANGE (-32768, 65535); - OP (0) = relocation; - OP (1) = relocation >> 8; - break; - - case R_RL78_DIR16U: - RANGE (0, 65536); - OP (0) = relocation; - OP (1) = relocation >> 8; - break; - - case R_RL78_DIR16: - RANGE (-32768, 65536); - OP (0) = relocation; - OP (1) = relocation >> 8; - break; - - case R_RL78_DIR16_REV: - RANGE (-32768, 65536); - OP (1) = relocation; - OP (0) = relocation >> 8; - break; - - case R_RL78_DIR3U_PCREL: - RANGE (3, 10); - OP (0) &= 0xf8; - OP (0) |= relocation & 0x07; - break; - - case R_RL78_DIR24S_PCREL: - RANGE (-0x800000, 0x7fffff); - OP (0) = relocation; - OP (1) = relocation >> 8; - OP (2) = relocation >> 16; - break; - - case R_RL78_DIR24S: - RANGE (-0x800000, 0x7fffff); - OP (0) = relocation; - OP (1) = relocation >> 8; - OP (2) = relocation >> 16; - break; - - case R_RL78_DIR32: - OP (0) = relocation; - OP (1) = relocation >> 8; - OP (2) = relocation >> 16; - OP (3) = relocation >> 24; - break; - - case R_RL78_DIR32_REV: - OP (3) = relocation; - OP (2) = relocation >> 8; - OP (1) = relocation >> 16; - OP (0) = relocation >> 24; - break; - - case R_RL78_RH_SFR: - RANGE (0xfff00, 0xfffff); - OP (0) = relocation & 0xff; - break; - - case R_RL78_RH_SADDR: - RANGE (0xffe20, 0xfff1f); - OP (0) = relocation & 0xff; - break; - - /* Complex reloc handling: */ - - case R_RL78_ABS32: - RL78_STACK_POP (relocation); - OP (0) = relocation; - OP (1) = relocation >> 8; - OP (2) = relocation >> 16; - OP (3) = relocation >> 24; - break; - - case R_RL78_ABS32_REV: - RL78_STACK_POP (relocation); - OP (3) = relocation; - OP (2) = relocation >> 8; - OP (1) = relocation >> 16; - OP (0) = relocation >> 24; - break; - - case R_RL78_ABS24S_PCREL: - case R_RL78_ABS24S: - RL78_STACK_POP (relocation); - RANGE (-0x800000, 0x7fffff); - OP (0) = relocation; - OP (1) = relocation >> 8; - OP (2) = relocation >> 16; - break; - - case R_RL78_ABS16: - RL78_STACK_POP (relocation); - RANGE (-32768, 65535); - OP (0) = relocation; - OP (1) = relocation >> 8; - break; - - case R_RL78_ABS16_REV: - RL78_STACK_POP (relocation); - RANGE (-32768, 65535); - OP (1) = relocation; - OP (0) = relocation >> 8; - break; - - case R_RL78_ABS16S_PCREL: - case R_RL78_ABS16S: - RL78_STACK_POP (relocation); - RANGE (-32768, 32767); - OP (0) = relocation; - OP (1) = relocation >> 8; - break; - - case R_RL78_ABS16U: - RL78_STACK_POP (relocation); - RANGE (0, 65536); - OP (0) = relocation; - OP (1) = relocation >> 8; - break; - - case R_RL78_ABS16UL: - RL78_STACK_POP (relocation); - relocation >>= 2; - RANGE (0, 65536); - OP (0) = relocation; - OP (1) = relocation >> 8; - break; - - case R_RL78_ABS16UW: - RL78_STACK_POP (relocation); - relocation >>= 1; - RANGE (0, 65536); - OP (0) = relocation; - OP (1) = relocation >> 8; - break; - - case R_RL78_ABS8: - RL78_STACK_POP (relocation); - RANGE (-128, 255); - OP (0) = relocation; - break; - - case R_RL78_ABS8U: - RL78_STACK_POP (relocation); - RANGE (0, 255); - OP (0) = relocation; - break; - - case R_RL78_ABS8UL: - RL78_STACK_POP (relocation); - relocation >>= 2; - RANGE (0, 255); - OP (0) = relocation; - break; - - case R_RL78_ABS8UW: - RL78_STACK_POP (relocation); - relocation >>= 1; - RANGE (0, 255); - OP (0) = relocation; - break; - - case R_RL78_ABS8S_PCREL: - case R_RL78_ABS8S: - RL78_STACK_POP (relocation); - RANGE (-128, 127); - OP (0) = relocation; - break; - - case R_RL78_SYM: - if (r_symndx < symtab_hdr->sh_info) - RL78_STACK_PUSH (sec->output_section->vma - + sec->output_offset - + sym->st_value - + rel->r_addend); - else - { - if (h != NULL - && (h->root.type == bfd_link_hash_defined - || h->root.type == bfd_link_hash_defweak)) - RL78_STACK_PUSH (h->root.u.def.value - + sec->output_section->vma - + sec->output_offset - + rel->r_addend); - else if (h->root.type == bfd_link_hash_undefweak) - RL78_STACK_PUSH (0); - else - _bfd_error_handler (_("Warning: RL78_SYM reloc with an unknown symbol")); - } - break; - - case R_RL78_OPneg: - { - int32_t tmp; - - RL78_STACK_POP (tmp); - tmp = - tmp; - RL78_STACK_PUSH (tmp); - } - break; - - case R_RL78_OPadd: - { - int32_t tmp1, tmp2; - - RL78_STACK_POP (tmp2); - RL78_STACK_POP (tmp1); - tmp1 += tmp2; - RL78_STACK_PUSH (tmp1); - } - break; - - case R_RL78_OPsub: - { - int32_t tmp1, tmp2; - - /* For the expression "A - B", the assembler pushes A, - then B, then OPSUB. So the first op we pop is B, not - A. */ - RL78_STACK_POP (tmp2); /* B */ - RL78_STACK_POP (tmp1); /* A */ - tmp1 -= tmp2; /* A - B */ - RL78_STACK_PUSH (tmp1); - } - break; - - case R_RL78_OPmul: - { - int32_t tmp1, tmp2; - - RL78_STACK_POP (tmp2); - RL78_STACK_POP (tmp1); - tmp1 *= tmp2; - RL78_STACK_PUSH (tmp1); - } - break; - - case R_RL78_OPdiv: - { - int32_t tmp1, tmp2; - - RL78_STACK_POP (tmp2); - RL78_STACK_POP (tmp1); - tmp1 /= tmp2; - RL78_STACK_PUSH (tmp1); - } - break; - - case R_RL78_OPshla: - { - int32_t tmp1, tmp2; - - RL78_STACK_POP (tmp2); - RL78_STACK_POP (tmp1); - tmp1 <<= tmp2; - RL78_STACK_PUSH (tmp1); - } - break; - - case R_RL78_OPshra: - { - int32_t tmp1, tmp2; - - RL78_STACK_POP (tmp2); - RL78_STACK_POP (tmp1); - tmp1 >>= tmp2; - RL78_STACK_PUSH (tmp1); - } - break; - - case R_RL78_OPsctsize: - RL78_STACK_PUSH (input_section->size); - break; - - case R_RL78_OPscttop: - RL78_STACK_PUSH (input_section->output_section->vma); - break; - - case R_RL78_OPand: - { - int32_t tmp1, tmp2; - - RL78_STACK_POP (tmp2); - RL78_STACK_POP (tmp1); - tmp1 &= tmp2; - RL78_STACK_PUSH (tmp1); - } - break; - - case R_RL78_OPor: - { - int32_t tmp1, tmp2; - - RL78_STACK_POP (tmp2); - RL78_STACK_POP (tmp1); - tmp1 |= tmp2; - RL78_STACK_PUSH (tmp1); - } - break; - - case R_RL78_OPxor: - { - int32_t tmp1, tmp2; - - RL78_STACK_POP (tmp2); - RL78_STACK_POP (tmp1); - tmp1 ^= tmp2; - RL78_STACK_PUSH (tmp1); - } - break; - - case R_RL78_OPnot: - { - int32_t tmp; - - RL78_STACK_POP (tmp); - tmp = ~ tmp; - RL78_STACK_PUSH (tmp); - } - break; - - case R_RL78_OPmod: - { - int32_t tmp1, tmp2; - - RL78_STACK_POP (tmp2); - RL78_STACK_POP (tmp1); - tmp1 %= tmp2; - RL78_STACK_PUSH (tmp1); - } - break; - - case R_RL78_OPromtop: - RL78_STACK_PUSH (get_romstart (&r, info, input_bfd, input_section, rel->r_offset)); - break; - - case R_RL78_OPramtop: - RL78_STACK_PUSH (get_ramstart (&r, info, input_bfd, input_section, rel->r_offset)); - break; - - default: - r = bfd_reloc_notsupported; - break; - } - - if (r != bfd_reloc_ok) - { - const char * msg = NULL; - - switch (r) - { - case bfd_reloc_overflow: - /* Catch the case of a missing function declaration - and emit a more helpful error message. */ - if (r_type == R_RL78_DIR24S_PCREL) - msg = _("%B(%A): error: call to undefined function '%s'"); - else - r = info->callbacks->reloc_overflow - (info, (h ? &h->root : NULL), name, howto->name, (bfd_vma) 0, - input_bfd, input_section, rel->r_offset); - break; - - case bfd_reloc_undefined: - r = info->callbacks->undefined_symbol - (info, name, input_bfd, input_section, rel->r_offset, - TRUE); - break; - - case bfd_reloc_other: - msg = _("%B(%A): warning: unaligned access to symbol '%s' in the small data area"); - break; - - case bfd_reloc_outofrange: - msg = _("%B(%A): internal error: out of range error"); - break; - - case bfd_reloc_notsupported: - msg = _("%B(%A): internal error: unsupported relocation error"); - break; - - case bfd_reloc_dangerous: - msg = _("%B(%A): internal error: dangerous relocation"); - break; - - default: - msg = _("%B(%A): internal error: unknown error"); - break; - } - - if (msg) - _bfd_error_handler (msg, input_bfd, input_section, name); - - if (! r) - return FALSE; - } - } - - return TRUE; -} - -/* Function to set the ELF flag bits. */ - -static bfd_boolean -rl78_elf_set_private_flags (bfd * abfd, flagword flags) -{ - elf_elfheader (abfd)->e_flags = flags; - elf_flags_init (abfd) = TRUE; - return TRUE; -} - -static bfd_boolean no_warn_mismatch = FALSE; - -void bfd_elf32_rl78_set_target_flags (bfd_boolean); - -void -bfd_elf32_rl78_set_target_flags (bfd_boolean user_no_warn_mismatch) -{ - no_warn_mismatch = user_no_warn_mismatch; -} - -/* Merge backend specific data from an object file to the output - object file when linking. */ - -static bfd_boolean -rl78_elf_merge_private_bfd_data (bfd * ibfd, bfd * obfd) -{ - flagword new_flags; - flagword old_flags; - bfd_boolean error = FALSE; - - new_flags = elf_elfheader (ibfd)->e_flags; - old_flags = elf_elfheader (obfd)->e_flags; - - if (!elf_flags_init (obfd)) - { - /* First call, no flags set. */ - elf_flags_init (obfd) = TRUE; - elf_elfheader (obfd)->e_flags = new_flags; - } - else if (old_flags != new_flags) - { - flagword changed_flags = old_flags ^ new_flags; - - if (changed_flags & E_FLAG_RL78_G10) - { - (*_bfd_error_handler) - (_("RL78/G10 ABI conflict: cannot link G10 and non-G10 objects together")); - - if (old_flags & E_FLAG_RL78_G10) - (*_bfd_error_handler) (_("- %s is G10, %s is not"), - bfd_get_filename (obfd), bfd_get_filename (ibfd)); - else - (*_bfd_error_handler) (_("- %s is G10, %s is not"), - bfd_get_filename (ibfd), bfd_get_filename (obfd)); - } - } - - return !error; -} - -static bfd_boolean -rl78_elf_print_private_bfd_data (bfd * abfd, void * ptr) -{ - FILE * file = (FILE *) ptr; - flagword flags; - - BFD_ASSERT (abfd != NULL && ptr != NULL); - - /* Print normal ELF private data. */ - _bfd_elf_print_private_bfd_data (abfd, ptr); - - flags = elf_elfheader (abfd)->e_flags; - fprintf (file, _("private flags = 0x%lx:"), (long) flags); - - if (flags & E_FLAG_RL78_G10) - fprintf (file, _(" [G10]")); - - fputc ('\n', file); - return TRUE; -} - -/* Return the MACH for an e_flags value. */ - -static int -elf32_rl78_machine (bfd * abfd) -{ - if ((elf_elfheader (abfd)->e_flags & EF_RL78_CPU_MASK) == EF_RL78_CPU_RL78) - return bfd_mach_rl78; - - return 0; -} - -static bfd_boolean -rl78_elf_object_p (bfd * abfd) -{ - bfd_default_set_arch_mach (abfd, bfd_arch_rl78, - elf32_rl78_machine (abfd)); - return TRUE; -} - -#ifdef DEBUG -void -rl78_dump_symtab (bfd * abfd, void * internal_syms, void * external_syms) -{ - size_t locsymcount; - Elf_Internal_Sym * isymbuf; - Elf_Internal_Sym * isymend; - Elf_Internal_Sym * isym; - Elf_Internal_Shdr * symtab_hdr; - bfd_boolean free_internal = FALSE, free_external = FALSE; - char * st_info_str; - char * st_info_stb_str; - char * st_other_str; - char * st_shndx_str; - - if (! internal_syms) - { - internal_syms = bfd_malloc (1000); - free_internal = 1; - } - if (! external_syms) - { - external_syms = bfd_malloc (1000); - free_external = 1; - } - - symtab_hdr = &elf_tdata (abfd)->symtab_hdr; - locsymcount = symtab_hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym; - if (free_internal) - isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, - symtab_hdr->sh_info, 0, - internal_syms, external_syms, NULL); - else - isymbuf = internal_syms; - isymend = isymbuf + locsymcount; - - for (isym = isymbuf ; isym < isymend ; isym++) - { - switch (ELF_ST_TYPE (isym->st_info)) - { - case STT_FUNC: st_info_str = "STT_FUNC"; - case STT_SECTION: st_info_str = "STT_SECTION"; - case STT_FILE: st_info_str = "STT_FILE"; - case STT_OBJECT: st_info_str = "STT_OBJECT"; - case STT_TLS: st_info_str = "STT_TLS"; - default: st_info_str = ""; - } - switch (ELF_ST_BIND (isym->st_info)) - { - case STB_LOCAL: st_info_stb_str = "STB_LOCAL"; - case STB_GLOBAL: st_info_stb_str = "STB_GLOBAL"; - default: st_info_stb_str = ""; - } - switch (ELF_ST_VISIBILITY (isym->st_other)) - { - case STV_DEFAULT: st_other_str = "STV_DEFAULT"; - case STV_INTERNAL: st_other_str = "STV_INTERNAL"; - case STV_PROTECTED: st_other_str = "STV_PROTECTED"; - default: st_other_str = ""; - } - switch (isym->st_shndx) - { - case SHN_ABS: st_shndx_str = "SHN_ABS"; - case SHN_COMMON: st_shndx_str = "SHN_COMMON"; - case SHN_UNDEF: st_shndx_str = "SHN_UNDEF"; - default: st_shndx_str = ""; - } - } - if (free_internal) - free (internal_syms); - if (free_external) - free (external_syms); -} - -char * -rl78_get_reloc (long reloc) -{ - if (0 <= reloc && reloc < R_RL78_max) - return rl78_elf_howto_table[reloc].name; - return ""; -} -#endif /* DEBUG */ - - -/* support PLT for 16-bit references to 24-bit functions. */ - -/* We support 16-bit pointers to code above 64k by generating a thunk - below 64k containing a JMP instruction to the final address. */ - -static bfd_boolean -rl78_elf_check_relocs - (bfd * abfd, - struct bfd_link_info * info, - asection * sec, - const Elf_Internal_Rela * relocs) -{ - Elf_Internal_Shdr * symtab_hdr; - struct elf_link_hash_entry ** sym_hashes; - const Elf_Internal_Rela * rel; - const Elf_Internal_Rela * rel_end; - bfd_vma *local_plt_offsets; - asection *splt; - bfd *dynobj; - - if (info->relocatable) - return TRUE; - - symtab_hdr = &elf_tdata (abfd)->symtab_hdr; - sym_hashes = elf_sym_hashes (abfd); - local_plt_offsets = elf_local_got_offsets (abfd); - splt = NULL; - dynobj = elf_hash_table(info)->dynobj; - - rel_end = relocs + sec->reloc_count; - for (rel = relocs; rel < rel_end; rel++) - { - struct elf_link_hash_entry *h; - unsigned long r_symndx; - bfd_vma *offset; - - r_symndx = ELF32_R_SYM (rel->r_info); - if (r_symndx < symtab_hdr->sh_info) - h = NULL; - else - { - h = sym_hashes[r_symndx - symtab_hdr->sh_info]; - while (h->root.type == bfd_link_hash_indirect - || h->root.type == bfd_link_hash_warning) - h = (struct elf_link_hash_entry *) h->root.u.i.link; - - /* PR15323, ref flags aren't set for references in the same - object. */ - h->root.non_ir_ref = 1; - } - - switch (ELF32_R_TYPE (rel->r_info)) - { - /* This relocation describes a 16-bit pointer to a function. - We may need to allocate a thunk in low memory; reserve memory - for it now. */ - case R_RL78_DIR16S: - if (dynobj == NULL) - elf_hash_table (info)->dynobj = dynobj = abfd; - if (splt == NULL) - { - splt = bfd_get_linker_section (dynobj, ".plt"); - if (splt == NULL) - { - flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS - | SEC_IN_MEMORY | SEC_LINKER_CREATED - | SEC_READONLY | SEC_CODE); - splt = bfd_make_section_anyway_with_flags (dynobj, ".plt", - flags); - if (splt == NULL - || ! bfd_set_section_alignment (dynobj, splt, 1)) - return FALSE; - } - } - - if (h != NULL) - offset = &h->plt.offset; - else - { - if (local_plt_offsets == NULL) - { - size_t size; - unsigned int i; - - size = symtab_hdr->sh_info * sizeof (bfd_vma); - local_plt_offsets = (bfd_vma *) bfd_alloc (abfd, size); - if (local_plt_offsets == NULL) - return FALSE; - elf_local_got_offsets (abfd) = local_plt_offsets; - - for (i = 0; i < symtab_hdr->sh_info; i++) - local_plt_offsets[i] = (bfd_vma) -1; - } - offset = &local_plt_offsets[r_symndx]; - } - - if (*offset == (bfd_vma) -1) - { - *offset = splt->size; - splt->size += 4; - } - break; - } - } - - return TRUE; -} - -/* This must exist if dynobj is ever set. */ - -static bfd_boolean -rl78_elf_finish_dynamic_sections (bfd *abfd ATTRIBUTE_UNUSED, - struct bfd_link_info *info) -{ - bfd *dynobj; - asection *splt; - - if (!elf_hash_table (info)->dynamic_sections_created) - return TRUE; - - /* As an extra sanity check, verify that all plt entries have been - filled in. However, relaxing might have changed the relocs so - that some plt entries don't get filled in, so we have to skip - this check if we're relaxing. Unfortunately, check_relocs is - called before relaxation. */ - - if (info->relax_trip > 0) - return TRUE; - - if ((dynobj = elf_hash_table (info)->dynobj) != NULL - && (splt = bfd_get_linker_section (dynobj, ".plt")) != NULL) - { - bfd_byte *contents = splt->contents; - unsigned int i, size = splt->size; - - for (i = 0; i < size; i += 4) - { - unsigned int x = bfd_get_32 (dynobj, contents + i); - BFD_ASSERT (x != 0); - } - } - - return TRUE; -} - -static bfd_boolean -rl78_elf_always_size_sections (bfd *output_bfd ATTRIBUTE_UNUSED, - struct bfd_link_info *info) -{ - bfd *dynobj; - asection *splt; - - if (info->relocatable) - return TRUE; - - dynobj = elf_hash_table (info)->dynobj; - if (dynobj == NULL) - return TRUE; - - splt = bfd_get_linker_section (dynobj, ".plt"); - BFD_ASSERT (splt != NULL); - - splt->contents = (bfd_byte *) bfd_zalloc (dynobj, splt->size); - if (splt->contents == NULL) - return FALSE; - - return TRUE; -} - - - -/* Handle relaxing. */ - -/* A subroutine of rl78_elf_relax_section. If the global symbol H - is within the low 64k, remove any entry for it in the plt. */ - -struct relax_plt_data -{ - asection *splt; - bfd_boolean *again; -}; - -static bfd_boolean -rl78_relax_plt_check (struct elf_link_hash_entry *h, void * xdata) -{ - struct relax_plt_data *data = (struct relax_plt_data *) xdata; - - if (h->plt.offset != (bfd_vma) -1) - { - bfd_vma address; - - if (h->root.type == bfd_link_hash_undefined - || h->root.type == bfd_link_hash_undefweak) - address = 0; - else - address = (h->root.u.def.section->output_section->vma - + h->root.u.def.section->output_offset - + h->root.u.def.value); - - if (valid_16bit_address (address)) - { - h->plt.offset = -1; - data->splt->size -= 4; - *data->again = TRUE; - } - } - - return TRUE; -} - -/* A subroutine of rl78_elf_relax_section. If the global symbol H - previously had a plt entry, give it a new entry offset. */ - -static bfd_boolean -rl78_relax_plt_realloc (struct elf_link_hash_entry *h, void * xdata) -{ - bfd_vma *entry = (bfd_vma *) xdata; - - if (h->plt.offset != (bfd_vma) -1) - { - h->plt.offset = *entry; - *entry += 4; - } - - return TRUE; -} - -static bfd_boolean -rl78_elf_relax_plt_section (bfd *dynobj, - asection *splt, - struct bfd_link_info *info, - bfd_boolean *again) -{ - struct relax_plt_data relax_plt_data; - bfd *ibfd; - - /* Assume nothing changes. */ - *again = FALSE; - - if (info->relocatable) - return TRUE; - - /* We only relax the .plt section at the moment. */ - if (dynobj != elf_hash_table (info)->dynobj - || strcmp (splt->name, ".plt") != 0) - return TRUE; - - /* Quick check for an empty plt. */ - if (splt->size == 0) - return TRUE; - - /* Map across all global symbols; see which ones happen to - fall in the low 64k. */ - relax_plt_data.splt = splt; - relax_plt_data.again = again; - elf_link_hash_traverse (elf_hash_table (info), rl78_relax_plt_check, - &relax_plt_data); - - /* Likewise for local symbols, though that's somewhat less convenient - as we have to walk the list of input bfds and swap in symbol data. */ - for (ibfd = info->input_bfds; ibfd ; ibfd = ibfd->link_next) - { - bfd_vma *local_plt_offsets = elf_local_got_offsets (ibfd); - Elf_Internal_Shdr *symtab_hdr; - Elf_Internal_Sym *isymbuf = NULL; - unsigned int idx; - - if (! local_plt_offsets) - continue; - - symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; - if (symtab_hdr->sh_info != 0) - { - isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; - if (isymbuf == NULL) - isymbuf = bfd_elf_get_elf_syms (ibfd, symtab_hdr, - symtab_hdr->sh_info, 0, - NULL, NULL, NULL); - if (isymbuf == NULL) - return FALSE; - } - - for (idx = 0; idx < symtab_hdr->sh_info; ++idx) - { - Elf_Internal_Sym *isym; - asection *tsec; - bfd_vma address; - - if (local_plt_offsets[idx] == (bfd_vma) -1) - continue; - - isym = &isymbuf[idx]; - if (isym->st_shndx == SHN_UNDEF) - continue; - else if (isym->st_shndx == SHN_ABS) - tsec = bfd_abs_section_ptr; - else if (isym->st_shndx == SHN_COMMON) - tsec = bfd_com_section_ptr; - else - tsec = bfd_section_from_elf_index (ibfd, isym->st_shndx); - - address = (tsec->output_section->vma - + tsec->output_offset - + isym->st_value); - if (valid_16bit_address (address)) - { - local_plt_offsets[idx] = -1; - splt->size -= 4; - *again = TRUE; - } - } - - if (isymbuf != NULL - && symtab_hdr->contents != (unsigned char *) isymbuf) - { - if (! info->keep_memory) - free (isymbuf); - else - { - /* Cache the symbols for elf_link_input_bfd. */ - symtab_hdr->contents = (unsigned char *) isymbuf; - } - } - } - - /* If we changed anything, walk the symbols again to reallocate - .plt entry addresses. */ - if (*again && splt->size > 0) - { - bfd_vma entry = 0; - - elf_link_hash_traverse (elf_hash_table (info), - rl78_relax_plt_realloc, &entry); - - for (ibfd = info->input_bfds; ibfd ; ibfd = ibfd->link_next) - { - bfd_vma *local_plt_offsets = elf_local_got_offsets (ibfd); - unsigned int nlocals = elf_tdata (ibfd)->symtab_hdr.sh_info; - unsigned int idx; - - if (! local_plt_offsets) - continue; - - for (idx = 0; idx < nlocals; ++idx) - if (local_plt_offsets[idx] != (bfd_vma) -1) - { - local_plt_offsets[idx] = entry; - entry += 4; - } - } - } - - return TRUE; -} - -/* Delete some bytes from a section while relaxing. */ - -static bfd_boolean -elf32_rl78_relax_delete_bytes (bfd *abfd, asection *sec, bfd_vma addr, int count, - Elf_Internal_Rela *alignment_rel, int force_snip) -{ - Elf_Internal_Shdr * symtab_hdr; - unsigned int sec_shndx; - bfd_byte * contents; - Elf_Internal_Rela * irel; - Elf_Internal_Rela * irelend; - Elf_Internal_Sym * isym; - Elf_Internal_Sym * isymend; - bfd_vma toaddr; - unsigned int symcount; - struct elf_link_hash_entry ** sym_hashes; - struct elf_link_hash_entry ** end_hashes; - - if (!alignment_rel) - force_snip = 1; - - sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec); - - contents = elf_section_data (sec)->this_hdr.contents; - - /* The deletion must stop at the next alignment boundary, if - ALIGNMENT_REL is non-NULL. */ - toaddr = sec->size; - if (alignment_rel) - toaddr = alignment_rel->r_offset; - - irel = elf_section_data (sec)->relocs; - irelend = irel + sec->reloc_count; - - /* Actually delete the bytes. */ - memmove (contents + addr, contents + addr + count, - (size_t) (toaddr - addr - count)); - - /* If we don't have an alignment marker to worry about, we can just - shrink the section. Otherwise, we have to fill in the newly - created gap with NOP insns (0x03). */ - if (force_snip) - sec->size -= count; - else - memset (contents + toaddr - count, 0x03, 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 - || (force_snip && irel->r_offset == toaddr))) - irel->r_offset -= count; - - /* If we see an ALIGN marker at the end of the gap, we move it - to the beginning of the gap, since marking these gaps is what - they're for. */ - if (irel->r_offset == toaddr - && ELF32_R_TYPE (irel->r_info) == R_RL78_RH_RELAX - && irel->r_addend & RL78_RELAXA_ALIGN) - irel->r_offset -= count; - } - - /* Adjust the local symbols defined in this section. */ - symtab_hdr = &elf_tdata (abfd)->symtab_hdr; - isym = (Elf_Internal_Sym *) symtab_hdr->contents; - isymend = isym + symtab_hdr->sh_info; - - for (; isym < isymend; isym++) - { - /* If the symbol is in the range of memory we just moved, we - have to adjust its value. */ - if (isym->st_shndx == sec_shndx - && isym->st_value > addr - && isym->st_value < toaddr) - isym->st_value -= count; - - /* If the symbol *spans* the bytes we just deleted (i.e. it's - *end* is in the moved bytes but it's *start* isn't), then we - must adjust its size. */ - if (isym->st_shndx == sec_shndx - && isym->st_value < addr - && isym->st_value + isym->st_size > addr - && isym->st_value + isym->st_size < toaddr) - isym->st_size -= count; - } - - /* Now adjust the global symbols defined in this section. */ - symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym) - - symtab_hdr->sh_info); - sym_hashes = elf_sym_hashes (abfd); - end_hashes = sym_hashes + symcount; - - for (; sym_hashes < end_hashes; sym_hashes++) - { - struct elf_link_hash_entry *sym_hash = *sym_hashes; - - if ((sym_hash->root.type == bfd_link_hash_defined - || sym_hash->root.type == bfd_link_hash_defweak) - && sym_hash->root.u.def.section == sec) - { - /* As above, adjust the value if needed. */ - if (sym_hash->root.u.def.value > addr - && sym_hash->root.u.def.value < toaddr) - sym_hash->root.u.def.value -= count; - - /* As above, adjust the size if needed. */ - if (sym_hash->root.u.def.value < addr - && sym_hash->root.u.def.value + sym_hash->size > addr - && sym_hash->root.u.def.value + sym_hash->size < toaddr) - sym_hash->size -= count; - } - } - - return TRUE; -} - -/* Used to sort relocs by address. If relocs have the same address, - we maintain their relative order, except that R_RL78_RH_RELAX - alignment relocs must be the first reloc for any given address. */ - -static void -reloc_bubblesort (Elf_Internal_Rela * r, int count) -{ - int i; - bfd_boolean again; - bfd_boolean swappit; - - /* This is almost a classic bubblesort. It's the slowest sort, but - we're taking advantage of the fact that the relocations are - mostly in order already (the assembler emits them that way) and - we need relocs with the same address to remain in the same - relative order. */ - again = TRUE; - while (again) - { - again = FALSE; - for (i = 0; i < count - 1; i ++) - { - if (r[i].r_offset > r[i + 1].r_offset) - swappit = TRUE; - else if (r[i].r_offset < r[i + 1].r_offset) - swappit = FALSE; - else if (ELF32_R_TYPE (r[i + 1].r_info) == R_RL78_RH_RELAX - && (r[i + 1].r_addend & RL78_RELAXA_ALIGN)) - swappit = TRUE; - else if (ELF32_R_TYPE (r[i + 1].r_info) == R_RL78_RH_RELAX - && (r[i + 1].r_addend & RL78_RELAXA_ELIGN) - && !(ELF32_R_TYPE (r[i].r_info) == R_RL78_RH_RELAX - && (r[i].r_addend & RL78_RELAXA_ALIGN))) - swappit = TRUE; - else - swappit = FALSE; - - if (swappit) - { - Elf_Internal_Rela tmp; - - tmp = r[i]; - r[i] = r[i + 1]; - r[i + 1] = tmp; - /* If we do move a reloc back, re-scan to see if it - needs to be moved even further back. This avoids - most of the O(n^2) behavior for our cases. */ - if (i > 0) - i -= 2; - again = TRUE; - } - } - } -} - - -#define OFFSET_FOR_RELOC(rel, lrel, scale) \ - rl78_offset_for_reloc (abfd, rel + 1, symtab_hdr, shndx_buf, intsyms, \ - lrel, abfd, sec, link_info, scale) - -static bfd_vma -rl78_offset_for_reloc (bfd * abfd, - Elf_Internal_Rela * rel, - Elf_Internal_Shdr * symtab_hdr, - Elf_External_Sym_Shndx * shndx_buf ATTRIBUTE_UNUSED, - Elf_Internal_Sym * intsyms, - Elf_Internal_Rela ** lrel, - bfd * input_bfd, - asection * input_section, - struct bfd_link_info * info, - int * scale) -{ - bfd_vma symval; - bfd_reloc_status_type r; - - *scale = 1; - - /* REL is the first of 1..N relocations. We compute the symbol - value for each relocation, then combine them if needed. LREL - gets a pointer to the last relocation used. */ - while (1) - { - int32_t tmp1, tmp2; - - /* Get the value of the symbol referred to by the reloc. */ - if (ELF32_R_SYM (rel->r_info) < symtab_hdr->sh_info) - { - /* A local symbol. */ - Elf_Internal_Sym *isym; - asection *ssec; - - isym = intsyms + ELF32_R_SYM (rel->r_info); - - if (isym->st_shndx == SHN_UNDEF) - ssec = bfd_und_section_ptr; - else if (isym->st_shndx == SHN_ABS) - ssec = bfd_abs_section_ptr; - else if (isym->st_shndx == SHN_COMMON) - ssec = bfd_com_section_ptr; - else - ssec = bfd_section_from_elf_index (abfd, - isym->st_shndx); - - /* Initial symbol value. */ - symval = isym->st_value; - - /* GAS may have made this symbol relative to a section, in - which case, we have to add the addend to find the - symbol. */ - if (ELF_ST_TYPE (isym->st_info) == STT_SECTION) - symval += rel->r_addend; - - if (ssec) - { - if ((ssec->flags & SEC_MERGE) - && ssec->sec_info_type == SEC_INFO_TYPE_MERGE) - symval = _bfd_merged_section_offset (abfd, & ssec, - elf_section_data (ssec)->sec_info, - symval); - } - - /* Now make the offset relative to where the linker is putting it. */ - if (ssec) - symval += - ssec->output_section->vma + ssec->output_offset; - - symval += rel->r_addend; - } - else - { - unsigned long indx; - struct elf_link_hash_entry * h; - - /* An external symbol. */ - indx = ELF32_R_SYM (rel->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. */ - if (lrel) - *lrel = rel; - return 0; - } - - symval = (h->root.u.def.value - + h->root.u.def.section->output_section->vma - + h->root.u.def.section->output_offset); - - symval += rel->r_addend; - } - - switch (ELF32_R_TYPE (rel->r_info)) - { - case R_RL78_SYM: - RL78_STACK_PUSH (symval); - break; - - case R_RL78_OPneg: - RL78_STACK_POP (tmp1); - tmp1 = - tmp1; - RL78_STACK_PUSH (tmp1); - break; - - case R_RL78_OPadd: - RL78_STACK_POP (tmp1); - RL78_STACK_POP (tmp2); - tmp1 += tmp2; - RL78_STACK_PUSH (tmp1); - break; - - case R_RL78_OPsub: - RL78_STACK_POP (tmp1); - RL78_STACK_POP (tmp2); - tmp2 -= tmp1; - RL78_STACK_PUSH (tmp2); - break; - - case R_RL78_OPmul: - RL78_STACK_POP (tmp1); - RL78_STACK_POP (tmp2); - tmp1 *= tmp2; - RL78_STACK_PUSH (tmp1); - break; - - case R_RL78_OPdiv: - RL78_STACK_POP (tmp1); - RL78_STACK_POP (tmp2); - tmp1 /= tmp2; - RL78_STACK_PUSH (tmp1); - break; - - case R_RL78_OPshla: - RL78_STACK_POP (tmp1); - RL78_STACK_POP (tmp2); - tmp1 <<= tmp2; - RL78_STACK_PUSH (tmp1); - break; - - case R_RL78_OPshra: - RL78_STACK_POP (tmp1); - RL78_STACK_POP (tmp2); - tmp1 >>= tmp2; - RL78_STACK_PUSH (tmp1); - break; - - case R_RL78_OPsctsize: - RL78_STACK_PUSH (input_section->size); - break; - - case R_RL78_OPscttop: - RL78_STACK_PUSH (input_section->output_section->vma); - break; - - case R_RL78_OPand: - RL78_STACK_POP (tmp1); - RL78_STACK_POP (tmp2); - tmp1 &= tmp2; - RL78_STACK_PUSH (tmp1); - break; - - case R_RL78_OPor: - RL78_STACK_POP (tmp1); - RL78_STACK_POP (tmp2); - tmp1 |= tmp2; - RL78_STACK_PUSH (tmp1); - break; - - case R_RL78_OPxor: - RL78_STACK_POP (tmp1); - RL78_STACK_POP (tmp2); - tmp1 ^= tmp2; - RL78_STACK_PUSH (tmp1); - break; - - case R_RL78_OPnot: - RL78_STACK_POP (tmp1); - tmp1 = ~ tmp1; - RL78_STACK_PUSH (tmp1); - break; - - case R_RL78_OPmod: - RL78_STACK_POP (tmp1); - RL78_STACK_POP (tmp2); - tmp1 %= tmp2; - RL78_STACK_PUSH (tmp1); - break; - - case R_RL78_OPromtop: - RL78_STACK_PUSH (get_romstart (&r, info, input_bfd, input_section, rel->r_offset)); - break; - - case R_RL78_OPramtop: - RL78_STACK_PUSH (get_ramstart (&r, info, input_bfd, input_section, rel->r_offset)); - break; - - case R_RL78_DIR16UL: - case R_RL78_DIR8UL: - case R_RL78_ABS16UL: - case R_RL78_ABS8UL: - if (rl78_stack_top) - RL78_STACK_POP (symval); - if (lrel) - *lrel = rel; - *scale = 4; - return symval; - - case R_RL78_DIR16UW: - case R_RL78_DIR8UW: - case R_RL78_ABS16UW: - case R_RL78_ABS8UW: - if (rl78_stack_top) - RL78_STACK_POP (symval); - if (lrel) - *lrel = rel; - *scale = 2; - return symval; - - default: - if (rl78_stack_top) - RL78_STACK_POP (symval); - if (lrel) - *lrel = rel; - return symval; - } - - rel ++; - } -} - -struct { - int prefix; /* or -1 for "no prefix" */ - int insn; /* or -1 for "end of list" */ - int insn_for_saddr; /* or -1 for "no alternative" */ - int insn_for_sfr; /* or -1 for "no alternative" */ -} relax_addr16[] = { - { -1, 0x02, 0x06, -1 }, /* ADDW AX, !addr16 */ - { -1, 0x22, 0x26, -1 }, /* SUBW AX, !addr16 */ - { -1, 0x42, 0x46, -1 }, /* CMPW AX, !addr16 */ - { -1, 0x40, 0x4a, -1 }, /* CMP !addr16, #byte */ - - { -1, 0x0f, 0x0b, -1 }, /* ADD A, !addr16 */ - { -1, 0x1f, 0x1b, -1 }, /* ADDC A, !addr16 */ - { -1, 0x2f, 0x2b, -1 }, /* SUB A, !addr16 */ - { -1, 0x3f, 0x3b, -1 }, /* SUBC A, !addr16 */ - { -1, 0x4f, 0x4b, -1 }, /* CMP A, !addr16 */ - { -1, 0x5f, 0x5b, -1 }, /* AND A, !addr16 */ - { -1, 0x6f, 0x6b, -1 }, /* OR A, !addr16 */ - { -1, 0x7f, 0x7b, -1 }, /* XOR A, !addr16 */ - - { -1, 0x8f, 0x8d, 0x8e }, /* MOV A, !addr16 */ - { -1, 0x9f, 0x9d, 0x9e }, /* MOV !addr16, A */ - { -1, 0xaf, 0xad, 0xae }, /* MOVW AX, !addr16 */ - { -1, 0xbf, 0xbd, 0xbe }, /* MOVW !addr16, AX */ - { -1, 0xcf, 0xcd, 0xce }, /* MOVW !addr16, #word */ - - { -1, 0xa0, 0xa4, -1 }, /* INC !addr16 */ - { -1, 0xa2, 0xa6, -1 }, /* INCW !addr16 */ - { -1, 0xb0, 0xb4, -1 }, /* DEC !addr16 */ - { -1, 0xb2, 0xb6, -1 }, /* DECW !addr16 */ - - { -1, 0xd5, 0xd4, -1 }, /* CMP0 !addr16 */ - { -1, 0xe5, 0xe4, -1 }, /* ONEB !addr16 */ - { -1, 0xf5, 0xf4, -1 }, /* CLRB !addr16 */ - - { -1, 0xd9, 0xd8, -1 }, /* MOV X, !addr16 */ - { -1, 0xe9, 0xe8, -1 }, /* MOV B, !addr16 */ - { -1, 0xf9, 0xf8, -1 }, /* MOV C, !addr16 */ - { -1, 0xdb, 0xda, -1 }, /* MOVW BC, !addr16 */ - { -1, 0xeb, 0xea, -1 }, /* MOVW DE, !addr16 */ - { -1, 0xfb, 0xfa, -1 }, /* MOVW HL, !addr16 */ - - { 0x61, 0xaa, 0xa8, -1 }, /* XCH A, !addr16 */ - - { 0x71, 0x00, 0x02, 0x0a }, /* SET1 !addr16.0 */ - { 0x71, 0x10, 0x12, 0x1a }, /* SET1 !addr16.0 */ - { 0x71, 0x20, 0x22, 0x2a }, /* SET1 !addr16.0 */ - { 0x71, 0x30, 0x32, 0x3a }, /* SET1 !addr16.0 */ - { 0x71, 0x40, 0x42, 0x4a }, /* SET1 !addr16.0 */ - { 0x71, 0x50, 0x52, 0x5a }, /* SET1 !addr16.0 */ - { 0x71, 0x60, 0x62, 0x6a }, /* SET1 !addr16.0 */ - { 0x71, 0x70, 0x72, 0x7a }, /* SET1 !addr16.0 */ - - { 0x71, 0x08, 0x03, 0x0b }, /* CLR1 !addr16.0 */ - { 0x71, 0x18, 0x13, 0x1b }, /* CLR1 !addr16.0 */ - { 0x71, 0x28, 0x23, 0x2b }, /* CLR1 !addr16.0 */ - { 0x71, 0x38, 0x33, 0x3b }, /* CLR1 !addr16.0 */ - { 0x71, 0x48, 0x43, 0x4b }, /* CLR1 !addr16.0 */ - { 0x71, 0x58, 0x53, 0x5b }, /* CLR1 !addr16.0 */ - { 0x71, 0x68, 0x63, 0x6b }, /* CLR1 !addr16.0 */ - { 0x71, 0x78, 0x73, 0x7b }, /* CLR1 !addr16.0 */ - - { -1, -1, -1, -1 } -}; - -/* Relax one section. */ - -static bfd_boolean -rl78_elf_relax_section - (bfd * abfd, - asection * sec, - struct bfd_link_info * link_info, - bfd_boolean * again) -{ - Elf_Internal_Shdr * symtab_hdr; - Elf_Internal_Shdr * shndx_hdr; - Elf_Internal_Rela * internal_relocs; - Elf_Internal_Rela * free_relocs = NULL; - Elf_Internal_Rela * irel; - Elf_Internal_Rela * srel; - Elf_Internal_Rela * irelend; - Elf_Internal_Rela * next_alignment; - bfd_byte * contents = NULL; - bfd_byte * free_contents = NULL; - Elf_Internal_Sym * intsyms = NULL; - Elf_Internal_Sym * free_intsyms = NULL; - Elf_External_Sym_Shndx * shndx_buf = NULL; - bfd_vma pc; - bfd_vma symval ATTRIBUTE_UNUSED = 0; - int pcrel ATTRIBUTE_UNUSED = 0; - int code ATTRIBUTE_UNUSED = 0; - int section_alignment_glue; - int scale; - - if (abfd == elf_hash_table (link_info)->dynobj - && strcmp (sec->name, ".plt") == 0) - return rl78_elf_relax_plt_section (abfd, sec, link_info, again); - - /* Assume nothing changes. */ - *again = FALSE; - - /* We don't have to do anything for a relocatable link, if - this section does not have relocs, or if this is not a - code section. */ - if (link_info->relocatable - || (sec->flags & SEC_RELOC) == 0 - || sec->reloc_count == 0 - || (sec->flags & SEC_CODE) == 0) - return TRUE; - - symtab_hdr = &elf_tdata (abfd)->symtab_hdr; - shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr; - - /* Get the section contents. */ - if (elf_section_data (sec)->this_hdr.contents != NULL) - contents = elf_section_data (sec)->this_hdr.contents; - /* Go get them off disk. */ - else - { - if (! bfd_malloc_and_get_section (abfd, sec, &contents)) - goto error_return; - elf_section_data (sec)->this_hdr.contents = contents; - } - - /* Read this BFD's symbols. */ - /* Get cached copy if it exists. */ - if (symtab_hdr->contents != NULL) - intsyms = (Elf_Internal_Sym *) symtab_hdr->contents; - else - { - intsyms = bfd_elf_get_elf_syms (abfd, symtab_hdr, symtab_hdr->sh_info, 0, NULL, NULL, NULL); - symtab_hdr->contents = (bfd_byte *) intsyms; - } - - if (shndx_hdr->sh_size != 0) - { - bfd_size_type amt; - - amt = symtab_hdr->sh_info; - amt *= sizeof (Elf_External_Sym_Shndx); - shndx_buf = (Elf_External_Sym_Shndx *) bfd_malloc (amt); - if (shndx_buf == NULL) - goto error_return; - if (bfd_seek (abfd, shndx_hdr->sh_offset, SEEK_SET) != 0 - || bfd_bread (shndx_buf, amt, abfd) != amt) - goto error_return; - shndx_hdr->contents = (bfd_byte *) shndx_buf; - } - - /* Get a copy of the native relocations. */ - internal_relocs = (_bfd_elf_link_read_relocs - (abfd, sec, 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; - - /* The RL_ relocs must be just before the operand relocs they go - with, so we must sort them to guarantee this. We use bubblesort - instead of qsort so we can guarantee that relocs with the same - address remain in the same relative order. */ - reloc_bubblesort (internal_relocs, sec->reloc_count); - - /* Walk through them looking for relaxing opportunities. */ - irelend = internal_relocs + sec->reloc_count; - - - /* This will either be NULL or a pointer to the next alignment - relocation. */ - next_alignment = internal_relocs; - - /* We calculate worst case shrinkage caused by alignment directives. - No fool-proof, but better than either ignoring the problem or - doing heavy duty analysis of all the alignment markers in all - input sections. */ - section_alignment_glue = 0; - for (irel = internal_relocs; irel < irelend; irel++) - if (ELF32_R_TYPE (irel->r_info) == R_RL78_RH_RELAX - && irel->r_addend & RL78_RELAXA_ALIGN) - { - int this_glue = 1 << (irel->r_addend & RL78_RELAXA_ANUM); - - if (section_alignment_glue < this_glue) - section_alignment_glue = this_glue; - } - /* Worst case is all 0..N alignments, in order, causing 2*N-1 byte - shrinkage. */ - section_alignment_glue *= 2; - - for (irel = internal_relocs; irel < irelend; irel++) - { - unsigned char *insn; - int nrelocs; - - /* The insns we care about are all marked with one of these. */ - if (ELF32_R_TYPE (irel->r_info) != R_RL78_RH_RELAX) - continue; - - if (irel->r_addend & RL78_RELAXA_ALIGN - || next_alignment == internal_relocs) - { - /* When we delete bytes, we need to maintain all the alignments - indicated. In addition, we need to be careful about relaxing - jumps across alignment boundaries - these displacements - *grow* when we delete bytes. For now, don't shrink - displacements across an alignment boundary, just in case. - Note that this only affects relocations to the same - section. */ - next_alignment += 2; - while (next_alignment < irelend - && (ELF32_R_TYPE (next_alignment->r_info) != R_RL78_RH_RELAX - || !(next_alignment->r_addend & RL78_RELAXA_ELIGN))) - next_alignment ++; - if (next_alignment >= irelend || next_alignment->r_offset == 0) - next_alignment = NULL; - } - - /* When we hit alignment markers, see if we've shrunk enough - before them to reduce the gap without violating the alignment - requirements. */ - if (irel->r_addend & RL78_RELAXA_ALIGN) - { - /* At this point, the next relocation *should* be the ELIGN - end marker. */ - Elf_Internal_Rela *erel = irel + 1; - unsigned int alignment, nbytes; - - if (ELF32_R_TYPE (erel->r_info) != R_RL78_RH_RELAX) - continue; - if (!(erel->r_addend & RL78_RELAXA_ELIGN)) - continue; - - alignment = 1 << (irel->r_addend & RL78_RELAXA_ANUM); - - if (erel->r_offset - irel->r_offset < alignment) - continue; - - nbytes = erel->r_offset - irel->r_offset; - nbytes /= alignment; - nbytes *= alignment; - - elf32_rl78_relax_delete_bytes (abfd, sec, erel->r_offset-nbytes, nbytes, next_alignment, - erel->r_offset == sec->size); - *again = TRUE; - - continue; - } - - if (irel->r_addend & RL78_RELAXA_ELIGN) - continue; - - insn = contents + irel->r_offset; - - nrelocs = irel->r_addend & RL78_RELAXA_RNUM; - - /* At this point, we have an insn that is a candidate for linker - relaxation. There are NRELOCS relocs following that may be - relaxed, although each reloc may be made of more than one - reloc entry (such as gp-rel symbols). */ - - /* Get the value of the symbol referred to by the reloc. Just - in case this is the last reloc in the list, use the RL's - addend to choose between this reloc (no addend) or the next - (yes addend, which means at least one following reloc). */ - - /* srel points to the "current" reloction for this insn - - actually the last reloc for a given operand, which is the one - we need to update. We check the relaxations in the same - order that the relocations happen, so we'll just push it - along as we go. */ - srel = irel; - - pc = sec->output_section->vma + sec->output_offset - + srel->r_offset; - -#define GET_RELOC \ - BFD_ASSERT (nrelocs > 0); \ - symval = OFFSET_FOR_RELOC (srel, &srel, &scale); \ - pcrel = symval - pc + srel->r_addend; \ - nrelocs --; - -#define SNIPNR(offset, nbytes) \ - elf32_rl78_relax_delete_bytes (abfd, sec, (insn - contents) + offset, nbytes, next_alignment, 0); -#define SNIP(offset, nbytes, newtype) \ - SNIPNR (offset, nbytes); \ - srel->r_info = ELF32_R_INFO (ELF32_R_SYM (srel->r_info), newtype) - - /* The order of these bit tests must match the order that the - relocs appear in. Since we sorted those by offset, we can - predict them. */ - - /*----------------------------------------------------------------------*/ - /* EF ad BR $rel8 pcrel - ED al ah BR !abs16 abs - EE al ah BR $!rel16 pcrel - EC al ah as BR !!abs20 abs - - FD al ah CALL !abs16 abs - FE al ah CALL $!rel16 pcrel - FC al ah as CALL !!abs20 abs - - DC ad BC $rel8 - DE ad BNC $rel8 - DD ad BZ $rel8 - DF ad BNZ $rel8 - 61 C3 ad BH $rel8 - 61 D3 ad BNH $rel8 - 61 C8 EF ad SKC ; BR $rel8 - 61 D8 EF ad SKNC ; BR $rel8 - 61 E8 EF ad SKZ ; BR $rel8 - 61 F8 EF ad SKNZ ; BR $rel8 - 61 E3 EF ad SKH ; BR $rel8 - 61 F3 EF ad SKNH ; BR $rel8 - */ - - if (irel->r_addend & RL78_RELAXA_BRA) - { - /* SKIP opcodes that skip non-branches will have a relax tag - but no corresponding symbol to relax against; we just - skip those. */ - if (irel->r_addend & RL78_RELAXA_RNUM) - { - GET_RELOC; - } - - switch (insn[0]) - { - case 0xec: /* BR !!abs20 */ - - if (pcrel < 127 - && pcrel > -127) - { - insn[0] = 0xef; - insn[1] = pcrel; - SNIP (2, 2, R_RL78_DIR8S_PCREL); - *again = TRUE; - } - else if (symval < 65536) - { - insn[0] = 0xed; - insn[1] = symval & 0xff; - insn[2] = symval >> 8; - SNIP (2, 1, R_RL78_DIR16S); - *again = TRUE; - } - else if (pcrel < 32767 - && pcrel > -32767) - { - insn[0] = 0xee; - insn[1] = pcrel & 0xff; - insn[2] = pcrel >> 8; - SNIP (2, 1, R_RL78_DIR16S_PCREL); - *again = TRUE; - } - break; - - case 0xee: /* BR $!pcrel16 */ - case 0xed: /* BR $!abs16 */ - if (pcrel < 127 - && pcrel > -127) - { - insn[0] = 0xef; - insn[1] = pcrel; - SNIP (2, 1, R_RL78_DIR8S_PCREL); - *again = TRUE; - } - break; - - case 0xfc: /* CALL !!abs20 */ - if (symval < 65536) - { - insn[0] = 0xfd; - insn[1] = symval & 0xff; - insn[2] = symval >> 8; - SNIP (2, 1, R_RL78_DIR16S); - *again = TRUE; - } - else if (pcrel < 32767 - && pcrel > -32767) - { - insn[0] = 0xfe; - insn[1] = pcrel & 0xff; - insn[2] = pcrel >> 8; - SNIP (2, 1, R_RL78_DIR16S_PCREL); - *again = TRUE; - } - break; - - case 0x61: /* PREFIX */ - /* For SKIP/BR, we change the BR opcode and delete the - SKIP. That way, we don't have to find and change the - relocation for the BR. */ - /* Note that, for the case where we're skipping some - other insn, we have no "other" reloc but that's safe - here anyway. */ - switch (insn[1]) - { - case 0xc8: /* SKC */ - if (insn[2] == 0xef) - { - insn[2] = 0xde; /* BNC */ - SNIPNR (0, 2); - } - break; - - case 0xd8: /* SKNC */ - if (insn[2] == 0xef) - { - insn[2] = 0xdc; /* BC */ - SNIPNR (0, 2); - } - break; - - case 0xe8: /* SKZ */ - if (insn[2] == 0xef) - { - insn[2] = 0xdf; /* BNZ */ - SNIPNR (0, 2); - } - break; - - case 0xf8: /* SKNZ */ - if (insn[2] == 0xef) - { - insn[2] = 0xdd; /* BZ */ - SNIPNR (0, 2); - } - break; - - case 0xe3: /* SKH */ - if (insn[2] == 0xef) - { - insn[2] = 0xd3; /* BNH */ - SNIPNR (1, 1); /* we reuse the 0x61 prefix from the SKH */ - } - break; - - case 0xf3: /* SKNH */ - if (insn[2] == 0xef) - { - insn[2] = 0xc3; /* BH */ - SNIPNR (1, 1); /* we reuse the 0x61 prefix from the SKH */ - } - break; - } - break; - } - - } - - if (irel->r_addend & RL78_RELAXA_ADDR16) - { - /*----------------------------------------------------------------------*/ - /* Some insns have both a 16-bit address operand and an 8-bit - variant if the address is within a special range: - - Address 16-bit operand SADDR range SFR range - FFF00-FFFFF 0xff00-0xffff 0x00-0xff - FFE20-FFF1F 0xfe20-0xff1f 0x00-0xff - - The RELAX_ADDR16[] array has the insn encodings for the - 16-bit operand version, as well as the SFR and SADDR - variants. We only need to replace the encodings and - adjust the operand. - - Note: we intentionally do not attempt to decode and skip - any ES: prefix, as adding ES: means the addr16 (likely) - no longer points to saddr/sfr space. - */ - - int is_sfr; - int is_saddr; - int idx; - int poff; - - GET_RELOC; - - if (0xffe20 <= symval && symval <= 0xfffff) - { - - is_saddr = (0xffe20 <= symval && symval <= 0xfff1f); - is_sfr = (0xfff00 <= symval && symval <= 0xfffff); - - for (idx = 0; relax_addr16[idx].insn != -1; idx ++) - { - if (relax_addr16[idx].prefix != -1 - && insn[0] == relax_addr16[idx].prefix - && insn[1] == relax_addr16[idx].insn) - { - poff = 1; - } - else if (relax_addr16[idx].prefix == -1 - && insn[0] == relax_addr16[idx].insn) - { - poff = 0; - } - else - continue; - - /* We have a matched insn, and poff is 0 or 1 depending - on the base pattern size. */ - - if (is_sfr && relax_addr16[idx].insn_for_sfr != -1) - { - insn[poff] = relax_addr16[idx].insn_for_sfr; - SNIP (poff+2, 1, R_RL78_RH_SFR); - } - - else if (is_saddr && relax_addr16[idx].insn_for_saddr != -1) - { - insn[poff] = relax_addr16[idx].insn_for_saddr; - SNIP (poff+2, 1, R_RL78_RH_SADDR); - } - - } - } - } - - /*----------------------------------------------------------------------*/ - - } - - return TRUE; - - error_return: - if (free_relocs != NULL) - free (free_relocs); - - if (free_contents != NULL) - free (free_contents); - - if (shndx_buf != NULL) - { - shndx_hdr->contents = NULL; - free (shndx_buf); - } - - if (free_intsyms != NULL) - free (free_intsyms); - - return TRUE; -} - - - -#define ELF_ARCH bfd_arch_rl78 -#define ELF_MACHINE_CODE EM_RL78 -#define ELF_MAXPAGESIZE 0x1000 - -#define TARGET_LITTLE_SYM bfd_elf32_rl78_vec -#define TARGET_LITTLE_NAME "elf32-rl78" - -#define elf_info_to_howto_rel NULL -#define elf_info_to_howto rl78_info_to_howto_rela -#define elf_backend_object_p rl78_elf_object_p -#define elf_backend_relocate_section rl78_elf_relocate_section -#define elf_symbol_leading_char ('_') -#define elf_backend_can_gc_sections 1 - -#define bfd_elf32_bfd_reloc_type_lookup rl78_reloc_type_lookup -#define bfd_elf32_bfd_reloc_name_lookup rl78_reloc_name_lookup -#define bfd_elf32_bfd_set_private_flags rl78_elf_set_private_flags -#define bfd_elf32_bfd_merge_private_bfd_data rl78_elf_merge_private_bfd_data -#define bfd_elf32_bfd_print_private_bfd_data rl78_elf_print_private_bfd_data - -#define bfd_elf32_bfd_relax_section rl78_elf_relax_section -#define elf_backend_check_relocs rl78_elf_check_relocs -#define elf_backend_always_size_sections \ - rl78_elf_always_size_sections -#define elf_backend_finish_dynamic_sections \ - rl78_elf_finish_dynamic_sections - -#include "elf32-target.h" |