| /* BFD back-end for Zilog Z800n COFF binaries. |
| Copyright (C) 1992-2024 Free Software Foundation, Inc. |
| Contributed by Cygnus Support. |
| Written by Steve Chamberlain, <sac@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 "libbfd.h" |
| #include "bfdlink.h" |
| #include "coff/z8k.h" |
| #include "coff/internal.h" |
| #include "libcoff.h" |
| |
| #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (1) |
| |
| static reloc_howto_type r_imm32 = |
| HOWTO (R_IMM32, 0, 4, 32, false, 0, |
| complain_overflow_bitfield, 0, "r_imm32", true, 0xffffffff, |
| 0xffffffff, false); |
| |
| static reloc_howto_type r_imm4l = |
| HOWTO (R_IMM4L, 0, 1, 4, false, 0, |
| complain_overflow_bitfield, 0, "r_imm4l", true, 0xf, 0xf, false); |
| |
| static reloc_howto_type r_da = |
| HOWTO (R_IMM16, 0, 2, 16, false, 0, |
| complain_overflow_bitfield, 0, "r_da", true, 0x0000ffff, 0x0000ffff, |
| false); |
| |
| static reloc_howto_type r_imm8 = |
| HOWTO (R_IMM8, 0, 1, 8, false, 0, |
| complain_overflow_bitfield, 0, "r_imm8", true, 0x000000ff, 0x000000ff, |
| false); |
| |
| static reloc_howto_type r_rel16 = |
| HOWTO (R_REL16, 0, 2, 16, false, 0, |
| complain_overflow_bitfield, 0, "r_rel16", true, 0x0000ffff, 0x0000ffff, |
| true); |
| |
| static reloc_howto_type r_jr = |
| HOWTO (R_JR, 1, 1, 8, true, 0, complain_overflow_signed, 0, |
| "r_jr", true, 0xff, 0xff, true); |
| |
| static reloc_howto_type r_disp7 = |
| HOWTO (R_DISP7, 0, 1, 7, true, 0, complain_overflow_bitfield, 0, |
| "r_disp7", true, 0x7f, 0x7f, true); |
| |
| static reloc_howto_type r_callr = |
| HOWTO (R_CALLR, 1, 2, 12, true, 0, complain_overflow_signed, 0, |
| "r_callr", true, 0xfff, 0xfff, true); |
| |
| #define BADMAG(x) Z8KBADMAG(x) |
| #define Z8K 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) |
| { |
| switch (dst->r_type) |
| { |
| default: |
| internal->howto = NULL; |
| break; |
| case R_IMM8: |
| internal->howto = &r_imm8; |
| break; |
| case R_IMM16: |
| internal->howto = &r_da; |
| break; |
| case R_JR: |
| internal->howto = &r_jr; |
| break; |
| case R_DISP7: |
| internal->howto = &r_disp7; |
| break; |
| case R_CALLR: |
| internal->howto = &r_callr; |
| break; |
| case R_REL16: |
| internal->howto = &r_rel16; |
| break; |
| case R_IMM32: |
| internal->howto = &r_imm32; |
| break; |
| case R_IMM4L: |
| internal->howto = &r_imm4l; |
| break; |
| } |
| } |
| |
| #define RTYPE2HOWTO(internal, relocentry) rtype2howto (internal, relocentry) |
| |
| static reloc_howto_type * |
| coff_z8k_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| bfd_reloc_code_real_type code) |
| { |
| switch (code) |
| { |
| case BFD_RELOC_8: return & r_imm8; |
| case BFD_RELOC_16: return & r_da; |
| case BFD_RELOC_32: return & r_imm32; |
| case BFD_RELOC_8_PCREL: return & r_jr; |
| case BFD_RELOC_16_PCREL: return & r_rel16; |
| case BFD_RELOC_Z8K_DISP7: return & r_disp7; |
| case BFD_RELOC_Z8K_CALLR: return & r_callr; |
| case BFD_RELOC_Z8K_IMM4L: return & r_imm4l; |
| default: BFD_FAIL (); |
| return 0; |
| } |
| } |
| |
| static reloc_howto_type * |
| coff_z8k_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| const char *r_name) |
| { |
| if (strcasecmp (r_imm8.name, r_name) == 0) |
| return &r_imm8; |
| if (strcasecmp (r_da.name, r_name) == 0) |
| return &r_da; |
| if (strcasecmp (r_imm32.name, r_name) == 0) |
| return &r_imm32; |
| if (strcasecmp (r_jr.name, r_name) == 0) |
| return &r_jr; |
| if (strcasecmp (r_rel16.name, r_name) == 0) |
| return &r_rel16; |
| if (strcasecmp (r_disp7.name, r_name) == 0) |
| return &r_disp7; |
| if (strcasecmp (r_callr.name, r_name) == 0) |
| return &r_callr; |
| if (strcasecmp (r_imm4l.name, r_name) == 0) |
| return &r_imm4l; |
| |
| 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 || symbols == NULL) |
| 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 bool |
| extra_case (bfd *in_abfd, |
| struct bfd_link_info *link_info, |
| struct bfd_link_order *link_order, |
| arelent *reloc, |
| bfd_byte *data, |
| size_t *src_ptr, |
| size_t *dst_ptr) |
| { |
| asection * input_section = link_order->u.indirect.section; |
| bfd_size_type end = bfd_get_section_limit_octets (in_abfd, input_section); |
| bfd_size_type reloc_size = bfd_get_reloc_size (reloc->howto); |
| |
| if (*src_ptr > end |
| || reloc_size > end - *src_ptr) |
| { |
| link_info->callbacks->einfo |
| /* xgettext:c-format */ |
| (_("%X%P: %pB(%pA): relocation \"%pR\" goes out of range\n"), |
| in_abfd, input_section, reloc); |
| return false; |
| } |
| |
| switch (reloc->howto->type) |
| { |
| case R_IMM8: |
| bfd_put_8 (in_abfd, |
| bfd_coff_reloc16_get_value (reloc, link_info, input_section), |
| data + *dst_ptr); |
| *dst_ptr += 1; |
| *src_ptr += 1; |
| break; |
| |
| case R_IMM32: |
| /* If no flags are set, assume immediate value. */ |
| if (! (*reloc->sym_ptr_ptr)->section->flags) |
| { |
| bfd_put_32 (in_abfd, |
| bfd_coff_reloc16_get_value (reloc, link_info, |
| input_section), |
| data + *dst_ptr); |
| } |
| else |
| { |
| bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info, |
| input_section); |
| /* Addresses are 23 bit, and the layout of those in a 32-bit |
| value is as follows: |
| 1AAAAAAA xxxxxxxx AAAAAAAA AAAAAAAA |
| (A - address bits, x - ignore). */ |
| dst = (dst & 0xffff) | ((dst & 0xff0000) << 8) | 0x80000000; |
| bfd_put_32 (in_abfd, dst, data + *dst_ptr); |
| } |
| *dst_ptr += 4; |
| *src_ptr += 4; |
| break; |
| |
| case R_IMM4L: |
| bfd_put_8 (in_abfd, |
| ((bfd_get_8 (in_abfd, data + *dst_ptr) & 0xf0) |
| | (0x0f & bfd_coff_reloc16_get_value (reloc, link_info, |
| input_section))), |
| data + *dst_ptr); |
| *dst_ptr += 1; |
| *src_ptr += 1; |
| break; |
| |
| case R_IMM16: |
| bfd_put_16 (in_abfd, |
| bfd_coff_reloc16_get_value (reloc, link_info, input_section), |
| data + *dst_ptr); |
| *dst_ptr += 2; |
| *src_ptr += 2; |
| break; |
| |
| case R_JR: |
| { |
| bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info, |
| input_section); |
| bfd_vma dot = (*dst_ptr |
| + input_section->output_offset |
| + input_section->output_section->vma); |
| /* -1, since we're in the odd byte of the word and the pc has |
| been incremented. */ |
| bfd_signed_vma gap = dst - dot - 1; |
| |
| if ((gap & 1) != 0 || gap > 254 || gap < -256) |
| { |
| 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); |
| return false; |
| } |
| |
| bfd_put_8 (in_abfd, gap / 2, data + *dst_ptr); |
| *dst_ptr += 1; |
| *src_ptr += 1; |
| break; |
| } |
| |
| case R_DISP7: |
| { |
| bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info, |
| input_section); |
| bfd_vma dot = (*dst_ptr |
| + input_section->output_offset |
| + input_section->output_section->vma); |
| bfd_signed_vma gap = dst - dot - 1; |
| |
| if ((gap & 1) != 0 || gap > 0 || gap < -254) |
| { |
| 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); |
| return false; |
| } |
| |
| bfd_put_8 (in_abfd, |
| ((bfd_get_8 (in_abfd, data + *dst_ptr) & 0x80) |
| + (-gap / 2 & 0x7f)), |
| data + *dst_ptr); |
| *dst_ptr += 1; |
| *src_ptr += 1; |
| break; |
| } |
| |
| case R_CALLR: |
| { |
| bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info, |
| input_section); |
| bfd_vma dot = (*dst_ptr |
| + input_section->output_offset |
| + input_section->output_section->vma); |
| bfd_signed_vma gap = dst - dot - 2; |
| |
| if ((gap & 1) != 0 || gap > 4096 || gap < -4095) |
| { |
| 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); |
| return false; |
| } |
| |
| bfd_put_16 (in_abfd, |
| ((bfd_get_16 (in_abfd, data + *dst_ptr) & 0xf000) |
| | (-gap / 2 & 0x0fff)), |
| data + *dst_ptr); |
| *dst_ptr += 2; |
| *src_ptr += 2; |
| break; |
| } |
| |
| case R_REL16: |
| { |
| bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info, |
| input_section); |
| bfd_vma dot = (*dst_ptr |
| + input_section->output_offset |
| + input_section->output_section->vma); |
| bfd_signed_vma gap = dst - dot - 2; |
| |
| if (gap > 32767 || gap < -32768) |
| { |
| 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); |
| return false; |
| } |
| |
| bfd_put_16 (in_abfd, gap, data + *dst_ptr); |
| *dst_ptr += 2; |
| *src_ptr += 2; |
| break; |
| } |
| |
| default: |
| link_info->callbacks->einfo |
| /* xgettext:c-format */ |
| (_("%X%P: %pB(%pA): relocation \"%pR\" is not supported\n"), |
| in_abfd, input_section, reloc); |
| return false; |
| } |
| return true; |
| } |
| |
| #define coff_reloc16_extra_cases extra_case |
| #define coff_bfd_reloc_type_lookup coff_z8k_reloc_type_lookup |
| #define coff_bfd_reloc_name_lookup coff_z8k_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_BIG_COFF_TARGET_VEC (z8k_coff_vec, "coff-z8k", 0, 0, '_', NULL, COFF_SWAP_TABLE) |