| /* BFD back-end for Zilog Z80 COFF binaries. |
| Copyright (C) 2005-2021 Free Software Foundation, Inc. |
| Contributed by Arnold Metselaar <arnold_m@operamail.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 "libbfd.h" |
| #include "bfdlink.h" |
| #include "coff/z80.h" |
| #include "coff/internal.h" |
| #include "libcoff.h" |
| #include "libiberty.h" |
| |
| #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER 0 |
| |
| typedef const struct { |
| bfd_reloc_code_real_type r_type; |
| reloc_howto_type howto; |
| } bfd_howto_type; |
| |
| #define BFD_EMPTY_HOWTO(rt,x) {rt, EMPTY_HOWTO(x)} |
| #define BFD_HOWTO(rt,a,b,c,d,e,f,g,h,i,j,k,l,m) {rt, HOWTO(a,b,c,d,e,f,g,h,i,j,k,l,m)} |
| |
| static bfd_howto_type howto_table[] = |
| { |
| BFD_EMPTY_HOWTO (BFD_RELOC_NONE, 0), |
| |
| BFD_HOWTO (BFD_RELOC_32, |
| R_IMM32, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 32, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| 0, /* special_function */ |
| "r_imm32", /* name */ |
| false, /* partial_inplace */ |
| 0xffffffff, /* src_mask */ |
| 0xffffffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| BFD_HOWTO (BFD_RELOC_24, |
| R_IMM24, /* type */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 24, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| 0, /* special_function */ |
| "r_imm24", /* name */ |
| false, /* partial_inplace */ |
| 0x00ffffff, /* src_mask */ |
| 0x00ffffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| BFD_HOWTO (BFD_RELOC_16, |
| R_IMM16, /* type */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| 0, /* special_function */ |
| "r_imm16", /* name */ |
| false, /* partial_inplace */ |
| 0x0000ffff, /* src_mask */ |
| 0x0000ffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| BFD_HOWTO (BFD_RELOC_8, |
| R_IMM8, /* type */ |
| 0, /* rightshift */ |
| 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 8, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| 0, /* special_function */ |
| "r_imm8", /* name */ |
| false, /* partial_inplace */ |
| 0x000000ff, /* src_mask */ |
| 0x000000ff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| BFD_HOWTO (BFD_RELOC_8_PCREL, |
| R_JR, /* type */ |
| 0, /* rightshift */ |
| 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 8, /* bitsize */ |
| true, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| 0, /* special_function */ |
| "r_jr", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xFF, /* dst_mask */ |
| true), /* pcrel_offset */ |
| |
| BFD_HOWTO (BFD_RELOC_Z80_DISP8, |
| R_OFF8, /* type */ |
| 0, /* rightshift */ |
| 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 8, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| 0, /* special_function */ |
| "r_off8", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| BFD_HOWTO (BFD_RELOC_Z80_BYTE0, |
| R_BYTE0, /* type */ |
| 0, /* rightshift */ |
| 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 8, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| 0, /* special_function */ |
| "r_byte0", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| BFD_HOWTO (BFD_RELOC_Z80_BYTE1, |
| R_BYTE1, /* type */ |
| 8, /* rightshift */ |
| 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 8, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| 0, /* special_function */ |
| "r_byte1", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| BFD_HOWTO (BFD_RELOC_Z80_BYTE2, |
| R_BYTE2, /* type */ |
| 16, /* rightshift */ |
| 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 8, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| 0, /* special_function */ |
| "r_byte2", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| BFD_HOWTO (BFD_RELOC_Z80_BYTE3, |
| R_BYTE3, /* type */ |
| 24, /* rightshift */ |
| 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 8, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| 0, /* special_function */ |
| "r_byte3", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| BFD_HOWTO (BFD_RELOC_Z80_WORD0, |
| R_WORD0, /* type */ |
| 0, /* rightshift */ |
| 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| 0, /* special_function */ |
| "r_word0", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| BFD_HOWTO (BFD_RELOC_Z80_WORD1, |
| R_WORD1, /* type */ |
| 16, /* rightshift */ |
| 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| 0, /* special_function */ |
| "r_word1", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| BFD_HOWTO (BFD_RELOC_Z80_16_BE, |
| R_IMM16BE, /* type */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| 0, /* special_function */ |
| "r_imm16be", /* name */ |
| false, /* partial_inplace */ |
| 0x0000ffff, /* src_mask */ |
| 0x0000ffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| }; |
| |
| #define NUM_HOWTOS ARRAY_SIZE (howto_table) |
| |
| #define BADMAG(x) Z80BADMAG(x) |
| #define Z80 1 /* Customize coffcode.h. */ |
| #define __A_MAGIC_SET__ |
| |
| /* Code to swap in the reloc. */ |
| |
| #define SWAP_IN_RELOC_OFFSET H_GET_32 |
| #define SWAP_OUT_RELOC_OFFSET H_PUT_32 |
| |
| #define SWAP_OUT_RELOC_EXTRA(abfd, src, dst) \ |
| dst->r_stuff[0] = 'S'; \ |
| dst->r_stuff[1] = 'C'; |
| |
| /* Code to turn a r_type into a howto ptr, uses the above howto table. */ |
| static void |
| rtype2howto (arelent *internal, struct internal_reloc *dst) |
| { |
| unsigned i; |
| for (i = 0; i < NUM_HOWTOS; i++) |
| { |
| if (howto_table[i].howto.type == dst->r_type) |
| { |
| internal->howto = &howto_table[i].howto; |
| return; |
| } |
| } |
| internal->howto = NULL; |
| } |
| |
| #define RTYPE2HOWTO(internal, relocentry) rtype2howto (internal, relocentry) |
| |
| static reloc_howto_type * |
| coff_z80_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| bfd_reloc_code_real_type code) |
| { |
| unsigned i; |
| for (i = 0; i < NUM_HOWTOS; i++) |
| if (howto_table[i].r_type == code) |
| return &howto_table[i].howto; |
| |
| BFD_FAIL (); |
| return NULL; |
| } |
| |
| static reloc_howto_type * |
| coff_z80_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| const char *r_name) |
| { |
| unsigned i; |
| for (i = 0; i < NUM_HOWTOS; i++) |
| if (strcasecmp(howto_table[i].howto.name, r_name) == 0) |
| return &howto_table[i].howto; |
| |
| return NULL; |
| } |
| |
| /* Perform any necessary magic to the addend in a reloc entry. */ |
| |
| #define CALC_ADDEND(abfd, symbol, ext_reloc, cache_ptr) \ |
| cache_ptr->addend = ext_reloc.r_offset; |
| |
| #define RELOC_PROCESSING(relent,reloc,symbols,abfd,section) \ |
| reloc_processing(relent, reloc, symbols, abfd, section) |
| |
| static void |
| reloc_processing (arelent *relent, |
| struct internal_reloc *reloc, |
| asymbol **symbols, |
| bfd *abfd, |
| asection *section) |
| { |
| relent->address = reloc->r_vaddr; |
| rtype2howto (relent, reloc); |
| |
| if (reloc->r_symndx == -1) |
| relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; |
| else if (reloc->r_symndx >= 0 && reloc->r_symndx < obj_conv_table_size (abfd)) |
| relent->sym_ptr_ptr = symbols + obj_convert (abfd)[reloc->r_symndx]; |
| else |
| { |
| _bfd_error_handler |
| /* xgettext:c-format */ |
| (_("%pB: warning: illegal symbol index %ld in relocs"), |
| abfd, reloc->r_symndx); |
| relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; |
| } |
| relent->addend = reloc->r_offset; |
| relent->address -= section->vma; |
| } |
| |
| static void |
| extra_case (bfd *in_abfd, |
| struct bfd_link_info *link_info, |
| struct bfd_link_order *link_order, |
| arelent *reloc, |
| bfd_byte *data, |
| unsigned int *src_ptr, |
| unsigned int *dst_ptr) |
| { |
| asection * input_section = link_order->u.indirect.section; |
| int val = bfd_coff_reloc16_get_value (reloc, link_info, input_section); |
| |
| switch (reloc->howto->type) |
| { |
| case R_OFF8: |
| if (reloc->howto->partial_inplace) |
| val += (signed char)(bfd_get_8 ( in_abfd, data+*src_ptr) |
| & reloc->howto->src_mask); |
| if (val>127 || val<-128) /* Test for overflow. */ |
| (*link_info->callbacks->reloc_overflow) |
| (link_info, NULL, bfd_asymbol_name (*reloc->sym_ptr_ptr), |
| reloc->howto->name, reloc->addend, input_section->owner, |
| input_section, reloc->address); |
| |
| bfd_put_8 (in_abfd, val, data + *dst_ptr); |
| (*dst_ptr) += 1; |
| (*src_ptr) += 1; |
| break; |
| |
| case R_BYTE3: |
| bfd_put_8 (in_abfd, val >> 24, data + *dst_ptr); |
| (*dst_ptr) += 1; |
| (*src_ptr) += 1; |
| break; |
| |
| case R_BYTE2: |
| bfd_put_8 (in_abfd, val >> 16, data + *dst_ptr); |
| (*dst_ptr) += 1; |
| (*src_ptr) += 1; |
| break; |
| |
| case R_BYTE1: |
| bfd_put_8 (in_abfd, val >> 8, data + *dst_ptr); |
| (*dst_ptr) += 1; |
| (*src_ptr) += 1; |
| break; |
| |
| case R_IMM8: |
| if (reloc->howto->partial_inplace) |
| val += bfd_get_8 ( in_abfd, data+*src_ptr) & reloc->howto->src_mask; |
| /* Fall through. */ |
| case R_BYTE0: |
| bfd_put_8 (in_abfd, val, data + *dst_ptr); |
| (*dst_ptr) += 1; |
| (*src_ptr) += 1; |
| break; |
| |
| case R_WORD1: |
| bfd_put_16 (in_abfd, val >> 16, data + *dst_ptr); |
| (*dst_ptr) += 2; |
| (*src_ptr) += 2; |
| break; |
| |
| case R_IMM16: |
| if (reloc->howto->partial_inplace) |
| val += bfd_get_16 ( in_abfd, data+*src_ptr) & reloc->howto->src_mask; |
| /* Fall through. */ |
| case R_WORD0: |
| bfd_put_16 (in_abfd, val, data + *dst_ptr); |
| (*dst_ptr) += 2; |
| (*src_ptr) += 2; |
| break; |
| |
| case R_IMM24: |
| if (reloc->howto->partial_inplace) |
| val += (bfd_get_16 ( in_abfd, data+*src_ptr) |
| + (bfd_get_8 ( in_abfd, data+*src_ptr+2) << 16)) |
| & reloc->howto->src_mask; |
| bfd_put_16 (in_abfd, val, data + *dst_ptr); |
| bfd_put_8 (in_abfd, val >> 16, data + *dst_ptr+2); |
| (*dst_ptr) += 3; |
| (*src_ptr) += 3; |
| break; |
| |
| case R_IMM32: |
| if (reloc->howto->partial_inplace) |
| val += bfd_get_32 ( in_abfd, data+*src_ptr) & reloc->howto->src_mask; |
| bfd_put_32 (in_abfd, val, data + *dst_ptr); |
| (*dst_ptr) += 4; |
| (*src_ptr) += 4; |
| break; |
| |
| case R_JR: |
| { |
| if (reloc->howto->partial_inplace) |
| val += (signed char)(bfd_get_8 ( in_abfd, data+*src_ptr) |
| & reloc->howto->src_mask); |
| bfd_vma dot = (*dst_ptr |
| + input_section->output_offset |
| + input_section->output_section->vma); |
| int gap = val - dot; |
| if (gap >= 128 || gap < -128) |
| (*link_info->callbacks->reloc_overflow) |
| (link_info, NULL, bfd_asymbol_name (*reloc->sym_ptr_ptr), |
| reloc->howto->name, reloc->addend, input_section->owner, |
| input_section, reloc->address); |
| |
| bfd_put_8 (in_abfd, gap, data + *dst_ptr); |
| (*dst_ptr)++; |
| (*src_ptr)++; |
| break; |
| } |
| |
| case R_IMM16BE: |
| if (reloc->howto->partial_inplace) |
| val += (bfd_get_8 ( in_abfd, data+*src_ptr+0) * 0x100 + |
| bfd_get_8 ( in_abfd, data+*src_ptr+1)) & reloc->howto->src_mask; |
| |
| bfd_put_8 (in_abfd, val >> 8, data + *dst_ptr+0); |
| bfd_put_8 (in_abfd, val, data + *dst_ptr+1); |
| (*dst_ptr) += 2; |
| (*src_ptr) += 2; |
| break; |
| |
| default: |
| abort (); |
| } |
| } |
| |
| static bool |
| z80_is_local_label_name (bfd * abfd ATTRIBUTE_UNUSED, |
| const char * name) |
| { |
| return (name[0] == '.' && name[1] == 'L') || |
| _bfd_coff_is_local_label_name (abfd, name); |
| } |
| |
| #define coff_bfd_is_local_label_name z80_is_local_label_name |
| |
| #define coff_reloc16_extra_cases extra_case |
| #define coff_bfd_reloc_type_lookup coff_z80_reloc_type_lookup |
| #define coff_bfd_reloc_name_lookup coff_z80_reloc_name_lookup |
| |
| #ifndef bfd_pe_print_pdata |
| #define bfd_pe_print_pdata NULL |
| #endif |
| |
| #include "coffcode.h" |
| |
| #undef coff_bfd_get_relocated_section_contents |
| #define coff_bfd_get_relocated_section_contents \ |
| bfd_coff_reloc16_get_relocated_section_contents |
| |
| #undef coff_bfd_relax_section |
| #define coff_bfd_relax_section bfd_coff_reloc16_relax_section |
| |
| CREATE_LITTLE_COFF_TARGET_VEC (z80_coff_vec, "coff-z80", 0, |
| SEC_CODE | SEC_DATA, '\0', NULL, |
| COFF_SWAP_TABLE) |
| |