| /* BFD back-end for Zilog Z800n COFF binaries. |
| Copyright 1992, 1993, 1994, 1995, 1997, 1999, 2000, 2001, 2002 |
| 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 2 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 "bfd.h" |
| #include "sysdep.h" |
| #include "libbfd.h" |
| #include "bfdlink.h" |
| #include "coff/z8k.h" |
| #include "coff/internal.h" |
| #include "libcoff.h" |
| |
| static void extra_case PARAMS ((bfd *, struct bfd_link_info *, struct bfd_link_order *, arelent *, bfd_byte *, unsigned int *, unsigned int *)); |
| static void reloc_processing PARAMS ((arelent *, struct internal_reloc *, asymbol **, bfd *, asection *)); |
| static void rtype2howto PARAMS ((arelent *, struct internal_reloc *)); |
| static int coff_z8k_select_reloc PARAMS ((reloc_howto_type *)); |
| |
| #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (1) |
| |
| static reloc_howto_type r_imm32 = |
| HOWTO (R_IMM32, 0, 2, 32, FALSE, 0, |
| complain_overflow_bitfield, 0, "r_imm32", TRUE, 0xffffffff, |
| 0xffffffff, FALSE); |
| |
| static reloc_howto_type r_imm4l = |
| HOWTO (R_IMM4L, 0, 0, 4, FALSE, 0, |
| complain_overflow_bitfield, 0, "r_imm4l", TRUE, 0xf, 0xf, FALSE); |
| |
| static reloc_howto_type r_da = |
| HOWTO (R_IMM16, 0, 1, 16, FALSE, 0, |
| complain_overflow_bitfield, 0, "r_da", TRUE, 0x0000ffff, 0x0000ffff, |
| FALSE); |
| |
| static reloc_howto_type r_imm8 = |
| HOWTO (R_IMM8, 0, 0, 8, FALSE, 0, |
| complain_overflow_bitfield, 0, "r_imm8", TRUE, 0x000000ff, 0x000000ff, |
| FALSE); |
| |
| static reloc_howto_type r_rel16 = |
| HOWTO (R_REL16, 0, 1, 16, FALSE, 0, |
| complain_overflow_bitfield, 0, "r_rel16", TRUE, 0x0000ffff, 0x0000ffff, |
| TRUE); |
| |
| static reloc_howto_type r_jr = |
| HOWTO (R_JR, 0, 0, 8, TRUE, 0, complain_overflow_signed, 0, |
| "r_jr", TRUE, 0, 0, TRUE); |
| |
| static reloc_howto_type r_disp7 = |
| HOWTO (R_DISP7, 0, 0, 7, TRUE, 0, complain_overflow_bitfield, 0, |
| "r_disp7", TRUE, 0, 0, TRUE); |
| |
| static reloc_howto_type r_callr = |
| HOWTO (R_CALLR, 0, 1, 12, TRUE, 0, complain_overflow_signed, 0, |
| "r_callr", TRUE, 0xfff, 0xfff, TRUE); |
| |
| /* Turn a howto into a reloc number */ |
| |
| static int |
| coff_z8k_select_reloc (howto) |
| reloc_howto_type *howto; |
| { |
| return howto->type; |
| } |
| |
| #define SELECT_RELOC(x,howto) x.r_type = coff_z8k_select_reloc(howto) |
| |
| #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 (internal, dst) |
| arelent * internal; |
| struct internal_reloc *dst; |
| { |
| switch (dst->r_type) |
| { |
| default: |
| abort (); |
| 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) |
| |
| /* 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 (relent, reloc, symbols, abfd, section) |
| arelent * relent; |
| struct internal_reloc * reloc; |
| asymbol ** symbols; |
| bfd * abfd; |
| asection * section; |
| { |
| relent->address = reloc->r_vaddr; |
| rtype2howto (relent, reloc); |
| |
| if (reloc->r_symndx > 0) |
| relent->sym_ptr_ptr = symbols + obj_convert (abfd)[reloc->r_symndx]; |
| else |
| relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; |
| |
| relent->addend = reloc->r_offset; |
| relent->address -= section->vma; |
| } |
| |
| static void |
| extra_case (in_abfd, link_info, link_order, reloc, data, src_ptr, dst_ptr) |
| 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; |
| |
| 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); |
| /* Adresses 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 = (link_order->offset |
| + *dst_ptr |
| + input_section->output_section->vma); |
| int gap = dst - dot - 1; /* -1, since we're in the odd byte of the |
| word and the pc's been incremented. */ |
| |
| if (gap & 1) |
| abort (); |
| gap /= 2; |
| if (gap > 128 || gap < -128) |
| { |
| if (! ((*link_info->callbacks->reloc_overflow) |
| (link_info, bfd_asymbol_name (*reloc->sym_ptr_ptr), |
| reloc->howto->name, reloc->addend, input_section->owner, |
| input_section, reloc->address))) |
| abort (); |
| } |
| bfd_put_8 (in_abfd, gap, data + *dst_ptr); |
| (*dst_ptr)++; |
| (*src_ptr)++; |
| break; |
| } |
| |
| case R_DISP7: |
| { |
| bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info, |
| input_section); |
| bfd_vma dot = (link_order->offset |
| + *dst_ptr |
| + input_section->output_section->vma); |
| int gap = dst - dot - 1; /* -1, since we're in the odd byte of the |
| word and the pc's been incremented. */ |
| |
| if (gap & 1) |
| abort (); |
| gap /= 2; |
| |
| if (gap > 0 || gap < -128) |
| { |
| if (! ((*link_info->callbacks->reloc_overflow) |
| (link_info, bfd_asymbol_name (*reloc->sym_ptr_ptr), |
| reloc->howto->name, reloc->addend, input_section->owner, |
| input_section, reloc->address))) |
| abort (); |
| } |
| bfd_put_8 (in_abfd, |
| (bfd_get_8 ( in_abfd, data + *dst_ptr) & 0x80) + (-gap & 0x7f), |
| data + *dst_ptr); |
| (*dst_ptr)++; |
| (*src_ptr)++; |
| break; |
| } |
| |
| case R_CALLR: |
| { |
| bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info, |
| input_section); |
| bfd_vma dot = (link_order->offset |
| + *dst_ptr |
| + input_section->output_section->vma); |
| int gap = dst - dot - 2; |
| |
| if (gap & 1) |
| abort (); |
| gap /= 2; |
| if (gap > 8191 || gap < -8192) |
| { |
| if (! ((*link_info->callbacks->reloc_overflow) |
| (link_info, bfd_asymbol_name (*reloc->sym_ptr_ptr), |
| reloc->howto->name, reloc->addend, input_section->owner, |
| input_section, reloc->address))) |
| abort (); |
| } |
| bfd_put_16 (in_abfd, |
| (bfd_get_16 ( in_abfd, data + *dst_ptr) & 0xf000) | (-gap & 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 = (link_order->offset |
| + *dst_ptr |
| + input_section->output_section->vma); |
| int gap = dst - dot - 2; |
| |
| if (gap > 32767 || gap < -32768) |
| { |
| if (! ((*link_info->callbacks->reloc_overflow) |
| (link_info, bfd_asymbol_name (*reloc->sym_ptr_ptr), |
| reloc->howto->name, reloc->addend, input_section->owner, |
| input_section, reloc->address))) |
| abort (); |
| } |
| bfd_put_16 (in_abfd, (bfd_vma) gap, data + *dst_ptr); |
| (*dst_ptr) += 2; |
| (*src_ptr) += 2; |
| break; |
| } |
| |
| default: |
| abort (); |
| } |
| } |
| |
| #define coff_reloc16_extra_cases extra_case |
| |
| #include "coffcode.h" |
| |
| #undef coff_bfd_get_relocated_section_contents |
| #undef coff_bfd_relax_section |
| #define coff_bfd_get_relocated_section_contents \ |
| bfd_coff_reloc16_get_relocated_section_contents |
| #define coff_bfd_relax_section bfd_coff_reloc16_relax_section |
| |
| CREATE_BIG_COFF_TARGET_VEC (z8kcoff_vec, "coff-z8k", 0, 0, '_', NULL) |