Commit | Line | Data |
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01b49cb3 C |
1 | /* V850-specific support for 32-bit ELF |
2 | Copyright (C) 1994, 1995 Free Software Foundation, Inc. | |
3 | ||
4 | This file is part of BFD, the Binary File Descriptor library. | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; if not, write to the Free Software | |
18 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
19 | ||
20 | #include "bfd.h" | |
21 | #include "sysdep.h" | |
22 | #include "libbfd.h" | |
23 | #include "elf-bfd.h" | |
24 | ||
25 | static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup | |
26 | PARAMS ((bfd *abfd, bfd_reloc_code_real_type code)); | |
27 | static void v850_info_to_howto_rel | |
28 | PARAMS ((bfd *, arelent *, Elf32_Internal_Rel *)); | |
29 | ||
30 | ||
31 | /* Try to minimize the amount of space occupied by relocation tables | |
32 | on the ROM (not that the ROM won't be swamped by other ELF overhead). */ | |
33 | #define USE_REL | |
34 | ||
35 | enum reloc_type | |
36 | { | |
37 | R_V850_NONE = 0, | |
38 | R_V850_9_PCREL, | |
39 | R_V850_22_PCREL, | |
40 | R_V850_HI16_S, | |
41 | R_V850_HI16, | |
42 | R_V850_LO16, | |
43 | R_V850_max | |
44 | }; | |
45 | ||
46 | static reloc_howto_type elf_v850_howto_table[] = | |
47 | { | |
48 | /* This reloc does nothing. */ | |
49 | HOWTO (R_V850_NONE, /* type */ | |
50 | 0, /* rightshift */ | |
51 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
52 | 32, /* bitsize */ | |
53 | false, /* pc_relative */ | |
54 | 0, /* bitpos */ | |
55 | complain_overflow_bitfield, /* complain_on_overflow */ | |
56 | bfd_elf_generic_reloc, /* special_function */ | |
57 | "R_V850_NONE", /* name */ | |
58 | false, /* partial_inplace */ | |
59 | 0, /* src_mask */ | |
60 | 0, /* dst_mask */ | |
61 | false), /* pcrel_offset */ | |
62 | ||
63 | /* A PC relative 9 bit branch. */ | |
64 | HOWTO (R_V850_9_PCREL, /* type */ | |
65 | 2, /* rightshift */ | |
66 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
67 | 26, /* bitsize */ | |
68 | true, /* pc_relative */ | |
69 | 0, /* bitpos */ | |
70 | complain_overflow_bitfield, /* complain_on_overflow */ | |
71 | bfd_elf_generic_reloc, /* special_function */ | |
72 | "R_V850_9_PCREL", /* name */ | |
73 | false, /* partial_inplace */ | |
74 | 0x00ffffff, /* src_mask */ | |
75 | 0x00ffffff, /* dst_mask */ | |
76 | true), /* pcrel_offset */ | |
77 | ||
78 | /* A PC relative 22 bit branch. */ | |
79 | HOWTO (R_V850_22_PCREL, /* type */ | |
80 | 2, /* rightshift */ | |
81 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
82 | 22, /* bitsize */ | |
83 | true, /* pc_relative */ | |
84 | 7, /* bitpos */ | |
85 | complain_overflow_signed, /* complain_on_overflow */ | |
86 | bfd_elf_generic_reloc, /* special_function */ | |
87 | "R_V850_22_PCREL", /* name */ | |
88 | false, /* partial_inplace */ | |
89 | 0x07ffff80, /* src_mask */ | |
90 | 0x07ffff80, /* dst_mask */ | |
91 | true), /* pcrel_offset */ | |
92 | ||
93 | /* High 16 bits of symbol value. */ | |
94 | HOWTO (R_V850_HI16_S, /* type */ | |
95 | 0, /* rightshift */ | |
96 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
97 | 16, /* bitsize */ | |
98 | false, /* pc_relative */ | |
99 | 16, /* bitpos */ | |
100 | complain_overflow_dont,/* complain_on_overflow */ | |
101 | bfd_elf_generic_reloc, /* special_function */ | |
102 | "R_V850_HI16_S", /* name */ | |
103 | true, /* partial_inplace */ | |
104 | 0xffff, /* src_mask */ | |
105 | 0xffff, /* dst_mask */ | |
106 | false), /* pcrel_offset */ | |
107 | ||
108 | /* High 16 bits of symbol value. */ | |
109 | HOWTO (R_V850_HI16, /* type */ | |
110 | 0, /* rightshift */ | |
111 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
112 | 16, /* bitsize */ | |
113 | false, /* pc_relative */ | |
114 | 16, /* bitpos */ | |
115 | complain_overflow_dont,/* complain_on_overflow */ | |
116 | bfd_elf_generic_reloc, /* special_function */ | |
117 | "R_V850_HI16", /* name */ | |
118 | true, /* partial_inplace */ | |
119 | 0xffff, /* src_mask */ | |
120 | 0xffff, /* dst_mask */ | |
121 | false), /* pcrel_offset */ | |
122 | ||
123 | /* Low 16 bits of symbol value. */ | |
124 | HOWTO (R_V850_LO16, /* type */ | |
125 | 0, /* rightshift */ | |
126 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
127 | 16, /* bitsize */ | |
128 | false, /* pc_relative */ | |
129 | 16, /* bitpos */ | |
130 | complain_overflow_dont,/* complain_on_overflow */ | |
131 | bfd_elf_generic_reloc, /* special_function */ | |
132 | "R_V850_LO16", /* name */ | |
133 | true, /* partial_inplace */ | |
134 | 0xffff, /* src_mask */ | |
135 | 0xffff, /* dst_mask */ | |
136 | false), /* pcrel_offset */ | |
137 | }; | |
138 | ||
139 | /* Map BFD reloc types to V850 ELF reloc types. */ | |
140 | ||
141 | struct v850_reloc_map | |
142 | { | |
143 | unsigned char bfd_reloc_val; | |
144 | unsigned char elf_reloc_val; | |
145 | }; | |
146 | ||
147 | static const struct v850_reloc_map v850_reloc_map[] = | |
148 | { | |
149 | { BFD_RELOC_NONE, R_V850_NONE, }, | |
150 | { BFD_RELOC_V850_9_PCREL, R_V850_9_PCREL, }, | |
151 | { BFD_RELOC_V850_22_PCREL, R_V850_22_PCREL, }, | |
152 | { BFD_RELOC_HI16_S, R_V850_HI16_S, }, | |
153 | { BFD_RELOC_HI16, R_V850_HI16, }, | |
154 | { BFD_RELOC_LO16, R_V850_LO16, }, | |
155 | }; | |
156 | ||
157 | static reloc_howto_type * | |
158 | bfd_elf32_bfd_reloc_type_lookup (abfd, code) | |
159 | bfd *abfd; | |
160 | bfd_reloc_code_real_type code; | |
161 | { | |
162 | unsigned int i; | |
163 | ||
164 | for (i = 0; | |
165 | i < sizeof (v850_reloc_map) / sizeof (struct v850_reloc_map); | |
166 | i++) | |
167 | { | |
168 | if (v850_reloc_map[i].bfd_reloc_val == code) | |
169 | return &elf_v850_howto_table[v850_reloc_map[i].elf_reloc_val]; | |
170 | } | |
171 | ||
172 | return NULL; | |
173 | } | |
174 | ||
175 | /* Set the howto pointer for an V850 ELF reloc. */ | |
176 | ||
177 | static void | |
178 | v850_info_to_howto_rel (abfd, cache_ptr, dst) | |
179 | bfd *abfd; | |
180 | arelent *cache_ptr; | |
181 | Elf32_Internal_Rel *dst; | |
182 | { | |
183 | unsigned int r_type; | |
184 | ||
185 | r_type = ELF32_R_TYPE (dst->r_info); | |
186 | BFD_ASSERT (r_type < (unsigned int) R_V850_max); | |
187 | cache_ptr->howto = &elf_v850_howto_table[r_type]; | |
188 | } | |
189 | ||
190 | #define TARGET_BIG_SYM bfd_elf32_v850_vec | |
191 | #define TARGET_BIG_NAME "elf32-v850" | |
192 | #define ELF_ARCH bfd_arch_v850 | |
193 | #define ELF_MACHINE_CODE EM_CYGNUS_V850 | |
194 | #define ELF_MAXPAGESIZE 0x1000 | |
195 | ||
196 | #define elf_info_to_howto 0 | |
197 | #define elf_info_to_howto_rel v850_info_to_howto_rel | |
198 | ||
199 | #include "elf32-target.h" |