1 /* BFD back-end for Zilog Z80 COFF binaries.
2 Copyright (C) 2005-2014 Free Software Foundation, Inc.
3 Contributed by Arnold Metselaar <arnold_m@operamail.com>
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
27 #include "coff/internal.h"
30 #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER 0
32 static reloc_howto_type r_imm32 =
33 HOWTO (R_IMM32, 0, 2, 32, FALSE, 0,
34 complain_overflow_dont, 0, "r_imm32", TRUE, 0xffffffff, 0xffffffff,
37 static reloc_howto_type r_imm24 =
38 HOWTO (R_IMM24, 0, 1, 24, FALSE, 0,
39 complain_overflow_dont, 0, "r_imm24", TRUE, 0x00ffffff, 0x00ffffff,
42 static reloc_howto_type r_imm16 =
43 HOWTO (R_IMM16, 0, 1, 16, FALSE, 0,
44 complain_overflow_dont, 0, "r_imm16", TRUE, 0x0000ffff, 0x0000ffff,
47 static reloc_howto_type r_imm8 =
48 HOWTO (R_IMM8, 0, 0, 8, FALSE, 0,
49 complain_overflow_bitfield, 0, "r_imm8", TRUE, 0x000000ff, 0x000000ff,
52 static reloc_howto_type r_jr =
53 HOWTO (R_JR, 0, 0, 8, TRUE, 0,
54 complain_overflow_signed, 0, "r_jr", FALSE, 0, 0xFF,
57 static reloc_howto_type r_off8 =
58 HOWTO (R_OFF8, 0, 0, 8, FALSE, 0,
59 complain_overflow_signed, 0,"r_off8", FALSE, 0, 0xff,
63 #define BADMAG(x) Z80BADMAG(x)
64 #define Z80 1 /* Customize coffcode.h. */
65 #define __A_MAGIC_SET__
67 /* Code to swap in the reloc. */
69 #define SWAP_IN_RELOC_OFFSET H_GET_32
70 #define SWAP_OUT_RELOC_OFFSET H_PUT_32
72 #define SWAP_OUT_RELOC_EXTRA(abfd, src, dst) \
73 dst->r_stuff[0] = 'S'; \
74 dst->r_stuff[1] = 'C';
76 /* Code to turn a r_type into a howto ptr, uses the above howto table. */
79 rtype2howto (arelent *internal, struct internal_reloc *dst)
84 internal->howto = NULL;
87 internal->howto = &r_imm8;
90 internal->howto = &r_imm16;
93 internal->howto = &r_imm24;
96 internal->howto = &r_imm32;
99 internal->howto = &r_jr;
102 internal->howto = &r_off8;
107 #define RTYPE2HOWTO(internal, relocentry) rtype2howto (internal, relocentry)
109 static reloc_howto_type *
110 coff_z80_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
111 bfd_reloc_code_real_type code)
115 case BFD_RELOC_8: return & r_imm8;
116 case BFD_RELOC_16: return & r_imm16;
117 case BFD_RELOC_24: return & r_imm24;
118 case BFD_RELOC_32: return & r_imm32;
119 case BFD_RELOC_8_PCREL: return & r_jr;
120 case BFD_RELOC_Z80_DISP8: return & r_off8;
121 default: BFD_FAIL ();
126 static reloc_howto_type *
127 coff_z80_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
130 if (strcasecmp (r_imm8.name, r_name) == 0)
132 if (strcasecmp (r_imm16.name, r_name) == 0)
134 if (strcasecmp (r_imm24.name, r_name) == 0)
136 if (strcasecmp (r_imm32.name, r_name) == 0)
138 if (strcasecmp (r_jr.name, r_name) == 0)
140 if (strcasecmp (r_off8.name, r_name) == 0)
146 /* Perform any necessary magic to the addend in a reloc entry. */
148 #define CALC_ADDEND(abfd, symbol, ext_reloc, cache_ptr) \
149 cache_ptr->addend = ext_reloc.r_offset;
151 #define RELOC_PROCESSING(relent,reloc,symbols,abfd,section) \
152 reloc_processing(relent, reloc, symbols, abfd, section)
155 reloc_processing (arelent *relent,
156 struct internal_reloc *reloc,
161 relent->address = reloc->r_vaddr;
162 rtype2howto (relent, reloc);
164 if (reloc->r_symndx > 0)
165 relent->sym_ptr_ptr = symbols + obj_convert (abfd)[reloc->r_symndx];
167 relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
169 relent->addend = reloc->r_offset;
170 relent->address -= section->vma;
174 extra_case (bfd *in_abfd,
175 struct bfd_link_info *link_info,
176 struct bfd_link_order *link_order,
179 unsigned int *src_ptr,
180 unsigned int *dst_ptr)
182 asection * input_section = link_order->u.indirect.section;
185 switch (reloc->howto->type)
188 val = bfd_coff_reloc16_get_value (reloc, link_info,
190 if (val>127 || val<-128) /* Test for overflow. */
192 if (! ((*link_info->callbacks->reloc_overflow)
194 bfd_asymbol_name (*reloc->sym_ptr_ptr),
195 reloc->howto->name, reloc->addend, input_section->owner,
196 input_section, reloc->address)))
199 bfd_put_8 (in_abfd, val, data + *dst_ptr);
205 val = bfd_get_8 ( in_abfd, data+*src_ptr)
206 + bfd_coff_reloc16_get_value (reloc, link_info, input_section);
207 bfd_put_8 (in_abfd, val, data + *dst_ptr);
213 val = bfd_get_16 ( in_abfd, data+*src_ptr)
214 + bfd_coff_reloc16_get_value (reloc, link_info, input_section);
215 bfd_put_16 (in_abfd, val, data + *dst_ptr);
221 val = bfd_get_16 ( in_abfd, data+*src_ptr)
222 + (bfd_get_8 ( in_abfd, data+*src_ptr+2) << 16)
223 + bfd_coff_reloc16_get_value (reloc, link_info, input_section);
224 bfd_put_16 (in_abfd, val, data + *dst_ptr);
225 bfd_put_8 (in_abfd, val >> 16, data + *dst_ptr+2);
231 val = bfd_get_32 ( in_abfd, data+*src_ptr)
232 + bfd_coff_reloc16_get_value (reloc, link_info, input_section);
233 bfd_put_32 (in_abfd, val, data + *dst_ptr);
240 bfd_vma dst = bfd_coff_reloc16_get_value (reloc, link_info,
242 bfd_vma dot = (*dst_ptr
243 + input_section->output_offset
244 + input_section->output_section->vma);
245 int gap = dst - dot - 1; /* -1, Since the offset is relative
246 to the value of PC after reading
249 if (gap >= 128 || gap < -128)
251 if (! ((*link_info->callbacks->reloc_overflow)
253 bfd_asymbol_name (*reloc->sym_ptr_ptr),
254 reloc->howto->name, reloc->addend, input_section->owner,
255 input_section, reloc->address)))
258 bfd_put_8 (in_abfd, gap, data + *dst_ptr);
269 #define coff_reloc16_extra_cases extra_case
270 #define coff_bfd_reloc_type_lookup coff_z80_reloc_type_lookup
271 #define coff_bfd_reloc_name_lookup coff_z80_reloc_name_lookup
273 #ifndef bfd_pe_print_pdata
274 #define bfd_pe_print_pdata NULL
277 #include "coffcode.h"
279 #undef coff_bfd_get_relocated_section_contents
280 #define coff_bfd_get_relocated_section_contents \
281 bfd_coff_reloc16_get_relocated_section_contents
283 #undef coff_bfd_relax_section
284 #define coff_bfd_relax_section bfd_coff_reloc16_relax_section
286 CREATE_LITTLE_COFF_TARGET_VEC (z80_coff_vec, "coff-z80", 0,
287 SEC_CODE | SEC_DATA, '\0', NULL,