/* BFD back-end for Zilog Z800n COFF binaries. Copyright (C) 1992-2024 Free Software Foundation, Inc. Contributed by Cygnus Support. Written by Steve Chamberlain, . 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; 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; } 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)