1 /* picoJava specific support for 32-bit ELF
2 Copyright 1999 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 2 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
28 static bfd_reloc_status_type pj_elf_reloc
29 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
30 static reloc_howto_type *pj_elf_reloc_type_lookup
31 PARAMS ((bfd *, bfd_reloc_code_real_type));
32 static void pj_elf_info_to_howto
33 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
35 static reloc_howto_type pj_elf_howto_table[] =
38 HOWTO (R_PJ_NONE, /* type */
40 0, /* size (0 = byte, 1 = short, 2 = long) */
42 false, /* pc_relative */
44 complain_overflow_dont, /* complain_on_overflow */
45 pj_elf_reloc, /* special_function */
46 "R_PJ_NONE", /* name */
47 false, /* partial_inplace */
50 false), /* pcrel_offset */
52 /* 32 bit absolute relocation. Setting partial_inplace to true and
53 src_mask to a non-zero value is similar to the COFF toolchain. */
54 HOWTO (R_PJ_DATA_DIR32, /* type */
56 2, /* size (0 = byte, 1 = short, 2 = long) */
58 false, /* pc_relative */
60 complain_overflow_bitfield, /* complain_on_overflow */
61 pj_elf_reloc, /* special_function */
62 "R_PJ_DIR32", /* name */
63 true, /* partial_inplace */
64 0xffffffff, /* src_mask */
65 0xffffffff, /* dst_mask */
66 false), /* pcrel_offset */
68 /* 32 bit PC relative relocation. */
69 HOWTO (R_PJ_CODE_REL32, /* type */
71 2, /* size (0 = byte, 1 = short, 2 = long) */
73 true, /* pc_relative */
75 complain_overflow_signed, /* complain_on_overflow */
76 pj_elf_reloc, /* special_function */
77 "R_PJ_REL32", /* name */
78 false, /* partial_inplace */
80 0xffffffff, /* dst_mask */
81 true), /* pcrel_offset */
83 /* 16 bit PC relative relocation. */
84 HOWTO (R_PJ_CODE_REL16, /* type */
86 1, /* size (0 = byte, 1 = short, 2 = long) */
88 true, /* pc_relative */
90 complain_overflow_signed, /* complain_on_overf6w */
91 pj_elf_reloc, /* special_function */
92 "R_PJ_REL16", /* name */
93 false, /* partial_inplace */
94 0xffff, /* src_mask */
95 0xffff, /* dst_mask */
96 true), /* pcrel_offset */
99 HOWTO (R_PJ_CODE_DIR32, /* type */
101 2, /* size (0 = byte, 1 = short, 2 = long) */
103 false, /* pc_relative */
105 complain_overflow_bitfield, /* complain_on_overflow */
106 pj_elf_reloc, /* special_function */
107 "R_PJ_CODE_DIR32", /* name */
108 true, /* partial_inplace */
109 0xffffffff, /* src_mask */
110 0xffffffff, /* dst_mask */
111 false), /* pcrel_offset */
120 HOWTO (R_PJ_CODE_LO16, /* type */
122 1, /* size (0 = byte, 1 = short, 2 = long) */
124 false, /* pc_relative */
126 complain_overflow_unsigned, /* complain_on_overflow */
127 pj_elf_reloc, /* special_function */
128 "R_PJ_LO16", /* name */
129 false, /* partial_inplace */
130 0xffff, /* src_mask */
131 0xffff, /* dst_mask */
132 true), /* pcrel_offset */
134 HOWTO (R_PJ_CODE_HI16, /* type */
136 1, /* size (0 = byte, 1 = short, 2 = long) */
138 false, /* pc_relative */
140 complain_overflow_unsigned, /* complain_on_overflow */
141 pj_elf_reloc, /* special_function */
142 "R_PJ_HI16", /* name */
143 false, /* partial_inplace */
144 0xffff, /* src_mask */
145 0xffff, /* dst_mask */
146 true), /* pcrel_offset */
148 /* GNU extension to record C++ vtable hierarchy */
149 HOWTO (R_PJ_GNU_VTINHERIT, /* type */
151 2, /* size (0 = byte, 1 = short, 2 = long) */
153 false, /* pc_relative */
155 complain_overflow_dont, /* complain_on_overflow */
156 NULL, /* special_function */
157 "R_PJ_GNU_VTINHERIT", /* name */
158 false, /* partial_inplace */
161 false), /* pcrel_offset */
163 /* GNU extension to record C++ vtable member usage */
164 HOWTO (R_PJ_GNU_VTENTRY, /* type */
166 2, /* size (0 = byte, 1 = short, 2 = long) */
168 false, /* pc_relative */
170 complain_overflow_dont, /* complain_on_overflow */
171 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
172 "R_PJ_GNU_VTENTRY", /* name */
173 false, /* partial_inplace */
176 false), /* pcrel_offset */
180 /* This function is used for normal relocs. This is like the COFF
181 function, and is almost certainly incorrect for other ELF targets. */
183 static bfd_reloc_status_type
184 pj_elf_reloc (abfd, reloc_entry, symbol_in, data, input_section, output_bfd,
187 arelent *reloc_entry;
190 asection *input_section;
192 char **error_message ATTRIBUTE_UNUSED;
196 enum elf_pj_reloc_type r_type;
197 bfd_vma addr = reloc_entry->address;
198 bfd_byte *hit_data = addr + (bfd_byte *) data;
200 r_type = (enum elf_pj_reloc_type) reloc_entry->howto->type;
202 if (output_bfd != NULL)
204 /* Partial linking--do nothing. */
205 reloc_entry->address += input_section->output_offset;
209 if (symbol_in != NULL
210 && bfd_is_und_section (symbol_in->section))
211 return bfd_reloc_undefined;
213 if (bfd_is_com_section (symbol_in->section))
216 sym_value = (symbol_in->value +
217 symbol_in->section->output_section->vma +
218 symbol_in->section->output_offset);
222 case R_PJ_DATA_DIR32:
223 insn = bfd_get_32 (abfd, hit_data);
224 insn += sym_value + reloc_entry->addend;
225 bfd_put_32 (abfd, insn, hit_data);
228 /* Relocations in code are always bigendian, no matter what the
229 data endianness is. */
231 case R_PJ_CODE_DIR32:
232 insn = bfd_getb32 (hit_data);
233 insn += sym_value + reloc_entry->addend;
234 bfd_putb32 (insn, hit_data);
237 case R_PJ_CODE_REL16:
238 insn = bfd_getb16 (hit_data);
239 insn += sym_value + reloc_entry->addend
240 - (input_section->output_section->vma
241 + input_section->output_offset);
242 bfd_putb16 (insn, hit_data);
245 insn = bfd_getb16 (hit_data);
246 insn += sym_value + reloc_entry->addend;
247 bfd_putb16 (insn, hit_data);
251 insn = bfd_getb16 (hit_data);
252 insn += (sym_value + reloc_entry->addend) >> 16;
253 bfd_putb16 (insn, hit_data);
264 /* This structure is used to map BFD reloc codes to PJ ELF relocs. */
268 bfd_reloc_code_real_type bfd_reloc_val;
269 unsigned char elf_reloc_val;
272 /* An array mapping BFD reloc codes to PJ ELF relocs. */
274 static const struct elf_reloc_map pj_reloc_map[] =
276 { BFD_RELOC_NONE, R_PJ_NONE },
277 { BFD_RELOC_32, R_PJ_DATA_DIR32 },
278 { BFD_RELOC_PJ_CODE_DIR16, R_PJ_CODE_DIR16 },
279 { BFD_RELOC_PJ_CODE_DIR32, R_PJ_CODE_DIR32 },
280 { BFD_RELOC_PJ_CODE_LO16, R_PJ_CODE_LO16 },
281 { BFD_RELOC_PJ_CODE_HI16, R_PJ_CODE_HI16 },
282 { BFD_RELOC_PJ_CODE_REL32, R_PJ_CODE_REL32 },
283 { BFD_RELOC_PJ_CODE_REL16, R_PJ_CODE_REL16 },
284 { BFD_RELOC_VTABLE_INHERIT, R_PJ_GNU_VTINHERIT },
285 { BFD_RELOC_VTABLE_ENTRY, R_PJ_GNU_VTENTRY },
288 /* Given a BFD reloc code, return the howto structure for the
289 corresponding PJ ELf reloc. */
291 static reloc_howto_type *
292 pj_elf_reloc_type_lookup (abfd, code)
293 bfd *abfd ATTRIBUTE_UNUSED;
294 bfd_reloc_code_real_type code;
298 for (i = 0; i < sizeof (pj_reloc_map) / sizeof (struct elf_reloc_map); i++)
300 if (pj_reloc_map[i].bfd_reloc_val == code)
301 return &pj_elf_howto_table[(int) pj_reloc_map[i].elf_reloc_val];
307 /* Given an ELF reloc, fill in the howto field of a relent. */
310 pj_elf_info_to_howto (abfd, cache_ptr, dst)
311 bfd *abfd ATTRIBUTE_UNUSED;
313 Elf_Internal_Rela *dst;
317 r = ELF32_R_TYPE (dst->r_info);
319 BFD_ASSERT (r < (unsigned int) R_PJ_max);
321 cache_ptr->howto = &pj_elf_howto_table[r];
324 /* Take this moment to fill in the special picoJava bits in the
328 pj_elf_final_write_processing (abfd, linker)
330 boolean linker ATTRIBUTE_UNUSED;
332 elf_elfheader (abfd)->e_flags |= EF_PICOJAVA_ARCH;
333 elf_elfheader (abfd)->e_flags |= EF_PICOJAVA_GNUCALLS;
336 #define TARGET_BIG_SYM bfd_elf32_pj_vec
337 #define TARGET_BIG_NAME "elf32-pj"
338 #define TARGET_LITTLE_SYM bfd_elf32_pjl_vec
339 #define TARGET_LITTLE_NAME "elf32-pjl"
340 #define ELF_ARCH bfd_arch_pj
341 #define ELF_MACHINE_CODE EM_PJ
342 #define ELF_MAXPAGESIZE 0x1000
343 #define bfd_elf32_bfd_get_relocated_section_contents bfd_generic_get_relocated_section_contents
344 #define bfd_elf32_bfd_reloc_type_lookup pj_elf_reloc_type_lookup
345 #define elf_backend_final_write_processing pj_elf_final_write_processing
346 #define elf_info_to_howto pj_elf_info_to_howto
347 #include "elf32-target.h"