1 /* picoJava specific support for 32-bit ELF
2 Copyright (C) 1999-2018 Free Software Foundation, Inc.
3 Contributed by Steve Chamberlan of Transmeta (sac@pobox.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. */
29 /* This function is used for normal relocs. This is like the COFF
30 function, and is almost certainly incorrect for other ELF targets. */
32 static bfd_reloc_status_type
33 pj_elf_reloc (bfd *abfd,
37 asection *input_section,
39 char **error_message ATTRIBUTE_UNUSED)
43 enum elf_pj_reloc_type r_type;
44 bfd_vma addr = reloc_entry->address;
45 bfd_byte *hit_data = addr + (bfd_byte *) data;
47 r_type = (enum elf_pj_reloc_type) reloc_entry->howto->type;
49 if (output_bfd != NULL)
51 /* Partial linking--do nothing. */
52 reloc_entry->address += input_section->output_offset;
57 && bfd_is_und_section (symbol_in->section))
58 return bfd_reloc_undefined;
60 if (bfd_is_com_section (symbol_in->section))
63 sym_value = (symbol_in->value +
64 symbol_in->section->output_section->vma +
65 symbol_in->section->output_offset);
70 insn = bfd_get_32 (abfd, hit_data);
71 insn += sym_value + reloc_entry->addend;
72 bfd_put_32 (abfd, (bfd_vma) insn, hit_data);
75 /* Relocations in code are always bigendian, no matter what the
76 data endianness is. */
79 insn = bfd_getb32 (hit_data);
80 insn += sym_value + reloc_entry->addend;
81 bfd_putb32 ((bfd_vma) insn, hit_data);
85 insn = bfd_getb16 (hit_data);
86 insn += sym_value + reloc_entry->addend
87 - (input_section->output_section->vma
88 + input_section->output_offset);
89 bfd_putb16 ((bfd_vma) insn, hit_data);
92 insn = bfd_getb16 (hit_data);
93 insn += sym_value + reloc_entry->addend;
94 bfd_putb16 ((bfd_vma) insn, hit_data);
98 insn = bfd_getb16 (hit_data);
99 insn += (sym_value + reloc_entry->addend) >> 16;
100 bfd_putb16 ((bfd_vma) insn, hit_data);
111 static reloc_howto_type pj_elf_howto_table[] =
114 HOWTO (R_PJ_NONE, /* type */
116 3, /* size (0 = byte, 1 = short, 2 = long) */
118 FALSE, /* pc_relative */
120 complain_overflow_dont, /* complain_on_overflow */
121 pj_elf_reloc, /* special_function */
122 "R_PJ_NONE", /* name */
123 FALSE, /* partial_inplace */
126 FALSE), /* pcrel_offset */
128 /* 32 bit absolute relocation. Setting partial_inplace to TRUE and
129 src_mask to a non-zero value is similar to the COFF toolchain. */
130 HOWTO (R_PJ_DATA_DIR32, /* type */
132 2, /* size (0 = byte, 1 = short, 2 = long) */
134 FALSE, /* pc_relative */
136 complain_overflow_bitfield, /* complain_on_overflow */
137 pj_elf_reloc, /* special_function */
138 "R_PJ_DIR32", /* name */
139 TRUE, /* partial_inplace */
140 0xffffffff, /* src_mask */
141 0xffffffff, /* dst_mask */
142 FALSE), /* pcrel_offset */
144 /* 32 bit PC relative relocation. */
145 HOWTO (R_PJ_CODE_REL32, /* type */
147 2, /* size (0 = byte, 1 = short, 2 = long) */
149 TRUE, /* pc_relative */
151 complain_overflow_signed, /* complain_on_overflow */
152 pj_elf_reloc, /* special_function */
153 "R_PJ_REL32", /* name */
154 FALSE, /* partial_inplace */
156 0xffffffff, /* dst_mask */
157 TRUE), /* pcrel_offset */
159 /* 16 bit PC relative relocation. */
160 HOWTO (R_PJ_CODE_REL16, /* type */
162 1, /* size (0 = byte, 1 = short, 2 = long) */
164 TRUE, /* pc_relative */
166 complain_overflow_signed, /* complain_on_overf6w */
167 pj_elf_reloc, /* special_function */
168 "R_PJ_REL16", /* name */
169 FALSE, /* partial_inplace */
170 0xffff, /* src_mask */
171 0xffff, /* dst_mask */
172 TRUE), /* pcrel_offset */
175 HOWTO (R_PJ_CODE_DIR32, /* type */
177 2, /* size (0 = byte, 1 = short, 2 = long) */
179 FALSE, /* pc_relative */
181 complain_overflow_bitfield, /* complain_on_overflow */
182 pj_elf_reloc, /* special_function */
183 "R_PJ_CODE_DIR32", /* name */
184 TRUE, /* partial_inplace */
185 0xffffffff, /* src_mask */
186 0xffffffff, /* dst_mask */
187 FALSE), /* pcrel_offset */
196 HOWTO (R_PJ_CODE_LO16, /* type */
198 1, /* size (0 = byte, 1 = short, 2 = long) */
200 FALSE, /* pc_relative */
202 complain_overflow_unsigned, /* complain_on_overflow */
203 pj_elf_reloc, /* special_function */
204 "R_PJ_LO16", /* name */
205 FALSE, /* partial_inplace */
206 0xffff, /* src_mask */
207 0xffff, /* dst_mask */
208 TRUE), /* pcrel_offset */
210 HOWTO (R_PJ_CODE_HI16, /* type */
212 1, /* size (0 = byte, 1 = short, 2 = long) */
214 FALSE, /* pc_relative */
216 complain_overflow_unsigned, /* complain_on_overflow */
217 pj_elf_reloc, /* special_function */
218 "R_PJ_HI16", /* name */
219 FALSE, /* partial_inplace */
220 0xffff, /* src_mask */
221 0xffff, /* dst_mask */
222 TRUE), /* pcrel_offset */
224 /* GNU extension to record C++ vtable hierarchy. */
225 HOWTO (R_PJ_GNU_VTINHERIT, /* type */
227 2, /* size (0 = byte, 1 = short, 2 = long) */
229 FALSE, /* pc_relative */
231 complain_overflow_dont, /* complain_on_overflow */
232 NULL, /* special_function */
233 "R_PJ_GNU_VTINHERIT", /* name */
234 FALSE, /* partial_inplace */
237 FALSE), /* pcrel_offset */
239 /* GNU extension to record C++ vtable member usage. */
240 HOWTO (R_PJ_GNU_VTENTRY, /* type */
242 2, /* size (0 = byte, 1 = short, 2 = long) */
244 FALSE, /* pc_relative */
246 complain_overflow_dont, /* complain_on_overflow */
247 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
248 "R_PJ_GNU_VTENTRY", /* name */
249 FALSE, /* partial_inplace */
252 FALSE), /* pcrel_offset */
255 /* This structure is used to map BFD reloc codes to PJ ELF relocs. */
259 bfd_reloc_code_real_type bfd_reloc_val;
260 unsigned char elf_reloc_val;
263 /* An array mapping BFD reloc codes to PJ ELF relocs. */
265 static const struct elf_reloc_map pj_reloc_map[] =
267 { BFD_RELOC_NONE, R_PJ_NONE },
268 { BFD_RELOC_32, R_PJ_DATA_DIR32 },
269 { BFD_RELOC_PJ_CODE_DIR16, R_PJ_CODE_DIR16 },
270 { BFD_RELOC_PJ_CODE_DIR32, R_PJ_CODE_DIR32 },
271 { BFD_RELOC_PJ_CODE_LO16, R_PJ_CODE_LO16 },
272 { BFD_RELOC_PJ_CODE_HI16, R_PJ_CODE_HI16 },
273 { BFD_RELOC_PJ_CODE_REL32, R_PJ_CODE_REL32 },
274 { BFD_RELOC_PJ_CODE_REL16, R_PJ_CODE_REL16 },
275 { BFD_RELOC_VTABLE_INHERIT, R_PJ_GNU_VTINHERIT },
276 { BFD_RELOC_VTABLE_ENTRY, R_PJ_GNU_VTENTRY },
279 /* Given a BFD reloc code, return the howto structure for the
280 corresponding PJ ELf reloc. */
282 static reloc_howto_type *
283 pj_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
284 bfd_reloc_code_real_type code)
288 for (i = 0; i < sizeof (pj_reloc_map) / sizeof (struct elf_reloc_map); i++)
289 if (pj_reloc_map[i].bfd_reloc_val == code)
290 return & pj_elf_howto_table[(int) pj_reloc_map[i].elf_reloc_val];
295 static reloc_howto_type *
296 pj_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
302 i < sizeof (pj_elf_howto_table) / sizeof (pj_elf_howto_table[0]);
304 if (pj_elf_howto_table[i].name != NULL
305 && strcasecmp (pj_elf_howto_table[i].name, r_name) == 0)
306 return &pj_elf_howto_table[i];
311 /* Given an ELF reloc, fill in the howto field of a relent. */
314 pj_elf_info_to_howto (bfd *abfd,
316 Elf_Internal_Rela *dst)
320 r = ELF32_R_TYPE (dst->r_info);
324 /* xgettext:c-format */
325 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
327 bfd_set_error (bfd_error_bad_value);
331 cache_ptr->howto = &pj_elf_howto_table[r];
335 /* Take this moment to fill in the special picoJava bits in the
339 pj_elf_final_write_processing (bfd *abfd,
340 bfd_boolean linker ATTRIBUTE_UNUSED)
342 elf_elfheader (abfd)->e_flags |= EF_PICOJAVA_ARCH;
343 elf_elfheader (abfd)->e_flags |= EF_PICOJAVA_GNUCALLS;
346 #define TARGET_BIG_SYM pj_elf32_vec
347 #define TARGET_BIG_NAME "elf32-pj"
348 #define TARGET_LITTLE_SYM pj_elf32_le_vec
349 #define TARGET_LITTLE_NAME "elf32-pjl"
350 #define ELF_ARCH bfd_arch_pj
351 #define ELF_MACHINE_CODE EM_PJ
352 #define ELF_MACHINE_ALT1 EM_PJ_OLD
353 #define ELF_MAXPAGESIZE 0x1000
354 #define bfd_elf32_bfd_get_relocated_section_contents \
355 bfd_generic_get_relocated_section_contents
356 #define bfd_elf32_bfd_reloc_type_lookup pj_elf_reloc_type_lookup
357 #define bfd_elf32_bfd_reloc_name_lookup pj_elf_reloc_name_lookup
358 #define elf_backend_final_write_processing pj_elf_final_write_processing
359 #define elf_info_to_howto pj_elf_info_to_howto
360 #include "elf32-target.h"