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252b5132 | 1 | /* SPARC-specific support for 32-bit ELF |
37fb6db1 ILT |
2 | Copyright (C) 1993, 94, 95, 96, 97, 98, 99, 2000 |
3 | Free Software Foundation, Inc. | |
252b5132 RH |
4 | |
5 | This file is part of BFD, the Binary File Descriptor library. | |
6 | ||
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. | |
11 | ||
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. | |
16 | ||
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. */ | |
20 | ||
21 | #include "bfd.h" | |
22 | #include "sysdep.h" | |
23 | #include "bfdlink.h" | |
24 | #include "libbfd.h" | |
25 | #include "elf-bfd.h" | |
26 | #include "elf/sparc.h" | |
f7775d95 | 27 | #include "opcode/sparc.h" |
252b5132 RH |
28 | |
29 | static reloc_howto_type *elf32_sparc_reloc_type_lookup | |
30 | PARAMS ((bfd *, bfd_reloc_code_real_type)); | |
31 | static void elf32_sparc_info_to_howto | |
32 | PARAMS ((bfd *, arelent *, Elf_Internal_Rela *)); | |
33 | static boolean elf32_sparc_check_relocs | |
34 | PARAMS ((bfd *, struct bfd_link_info *, asection *, | |
35 | const Elf_Internal_Rela *)); | |
36 | static boolean elf32_sparc_adjust_dynamic_symbol | |
37 | PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); | |
252b5132 RH |
38 | static boolean elf32_sparc_size_dynamic_sections |
39 | PARAMS ((bfd *, struct bfd_link_info *)); | |
f7775d95 JJ |
40 | static boolean elf32_sparc_relax_section |
41 | PARAMS ((bfd *, asection *, struct bfd_link_info *, boolean *)); | |
252b5132 RH |
42 | static boolean elf32_sparc_relocate_section |
43 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, | |
44 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); | |
45 | static boolean elf32_sparc_finish_dynamic_symbol | |
46 | PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, | |
47 | Elf_Internal_Sym *)); | |
48 | static boolean elf32_sparc_finish_dynamic_sections | |
49 | PARAMS ((bfd *, struct bfd_link_info *)); | |
50 | static boolean elf32_sparc_merge_private_bfd_data PARAMS ((bfd *, bfd *)); | |
51 | static boolean elf32_sparc_object_p | |
52 | PARAMS ((bfd *)); | |
53 | static void elf32_sparc_final_write_processing | |
54 | PARAMS ((bfd *, boolean)); | |
55 | \f | |
56 | /* The relocation "howto" table. */ | |
57 | ||
58 | static bfd_reloc_status_type sparc_elf_notsupported_reloc | |
59 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
60 | static bfd_reloc_status_type sparc_elf_wdisp16_reloc | |
61 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
62 | ||
63 | reloc_howto_type _bfd_sparc_elf_howto_table[] = | |
64 | { | |
65 | HOWTO(R_SPARC_NONE, 0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_NONE", false,0,0x00000000,true), | |
66 | HOWTO(R_SPARC_8, 0,0, 8,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_8", false,0,0x000000ff,true), | |
67 | HOWTO(R_SPARC_16, 0,1,16,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_16", false,0,0x0000ffff,true), | |
68 | HOWTO(R_SPARC_32, 0,2,32,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_32", false,0,0xffffffff,true), | |
69 | HOWTO(R_SPARC_DISP8, 0,0, 8,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_DISP8", false,0,0x000000ff,true), | |
70 | HOWTO(R_SPARC_DISP16, 0,1,16,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_DISP16", false,0,0x0000ffff,true), | |
71 | HOWTO(R_SPARC_DISP32, 0,2,32,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_DISP32", false,0,0x00ffffff,true), | |
72 | HOWTO(R_SPARC_WDISP30, 2,2,30,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_WDISP30", false,0,0x3fffffff,true), | |
73 | HOWTO(R_SPARC_WDISP22, 2,2,22,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_WDISP22", false,0,0x003fffff,true), | |
74 | HOWTO(R_SPARC_HI22, 10,2,22,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_HI22", false,0,0x003fffff,true), | |
75 | HOWTO(R_SPARC_22, 0,2,22,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_22", false,0,0x003fffff,true), | |
76 | HOWTO(R_SPARC_13, 0,2,13,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_13", false,0,0x00001fff,true), | |
77 | HOWTO(R_SPARC_LO10, 0,2,10,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_LO10", false,0,0x000003ff,true), | |
78 | HOWTO(R_SPARC_GOT10, 0,2,10,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_GOT10", false,0,0x000003ff,true), | |
79 | HOWTO(R_SPARC_GOT13, 0,2,13,false,0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_GOT13", false,0,0x00001fff,true), | |
80 | HOWTO(R_SPARC_GOT22, 10,2,22,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_GOT22", false,0,0x003fffff,true), | |
81 | HOWTO(R_SPARC_PC10, 0,2,10,true, 0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_PC10", false,0,0x000003ff,true), | |
82 | HOWTO(R_SPARC_PC22, 10,2,22,true, 0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_PC22", false,0,0x003fffff,true), | |
83 | HOWTO(R_SPARC_WPLT30, 2,2,30,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_WPLT30", false,0,0x3fffffff,true), | |
84 | HOWTO(R_SPARC_COPY, 0,0,00,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_COPY", false,0,0x00000000,true), | |
85 | HOWTO(R_SPARC_GLOB_DAT, 0,0,00,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_GLOB_DAT",false,0,0x00000000,true), | |
86 | HOWTO(R_SPARC_JMP_SLOT, 0,0,00,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_JMP_SLOT",false,0,0x00000000,true), | |
87 | HOWTO(R_SPARC_RELATIVE, 0,0,00,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_RELATIVE",false,0,0x00000000,true), | |
88 | HOWTO(R_SPARC_UA32, 0,0,00,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_UA32", false,0,0x00000000,true), | |
89 | HOWTO(R_SPARC_PLT32, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_PLT32", false,0,0x00000000,true), | |
90 | HOWTO(R_SPARC_HIPLT22, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_HIPLT22", false,0,0x00000000,true), | |
91 | HOWTO(R_SPARC_LOPLT10, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_LOPLT10", false,0,0x00000000,true), | |
92 | HOWTO(R_SPARC_PCPLT32, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_PCPLT32", false,0,0x00000000,true), | |
93 | HOWTO(R_SPARC_PCPLT22, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_PCPLT22", false,0,0x00000000,true), | |
94 | HOWTO(R_SPARC_PCPLT10, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_PCPLT10", false,0,0x00000000,true), | |
95 | HOWTO(R_SPARC_10, 0,2,10,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_10", false,0,0x000003ff,true), | |
96 | HOWTO(R_SPARC_11, 0,2,11,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_11", false,0,0x000007ff,true), | |
97 | /* These are for sparc64 in a 64 bit environment. | |
98 | Values need to be here because the table is indexed by reloc number. */ | |
99 | HOWTO(R_SPARC_64, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_64", false,0,0x00000000,true), | |
100 | HOWTO(R_SPARC_OLO10, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_OLO10", false,0,0x00000000,true), | |
101 | HOWTO(R_SPARC_HH22, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_HH22", false,0,0x00000000,true), | |
102 | HOWTO(R_SPARC_HM10, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_HM10", false,0,0x00000000,true), | |
103 | HOWTO(R_SPARC_LM22, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_LM22", false,0,0x00000000,true), | |
104 | HOWTO(R_SPARC_PC_HH22, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_PC_HH22", false,0,0x00000000,true), | |
105 | HOWTO(R_SPARC_PC_HM10, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_PC_HM10", false,0,0x00000000,true), | |
106 | HOWTO(R_SPARC_PC_LM22, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_PC_LM22", false,0,0x00000000,true), | |
107 | /* End sparc64 in 64 bit environment values. | |
108 | The following are for sparc64 in a 32 bit environment. */ | |
109 | HOWTO(R_SPARC_WDISP16, 2,2,16,true, 0,complain_overflow_signed, sparc_elf_wdisp16_reloc,"R_SPARC_WDISP16", false,0,0x00000000,true), | |
110 | HOWTO(R_SPARC_WDISP19, 2,2,19,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_WDISP19", false,0,0x0007ffff,true), | |
111 | HOWTO(R_SPARC_UNUSED_42, 0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_UNUSED_42",false,0,0x00000000,true), | |
112 | HOWTO(R_SPARC_7, 0,2, 7,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_7", false,0,0x0000007f,true), | |
113 | HOWTO(R_SPARC_5, 0,2, 5,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_5", false,0,0x0000001f,true), | |
114 | HOWTO(R_SPARC_6, 0,2, 6,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_6", false,0,0x0000003f,true), | |
115 | HOWTO(R_SPARC_NONE, 0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_NONE", false,0,0x00000000,true), | |
116 | HOWTO(R_SPARC_NONE, 0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_NONE", false,0,0x00000000,true), | |
117 | HOWTO(R_SPARC_NONE, 0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_NONE", false,0,0x00000000,true), | |
118 | HOWTO(R_SPARC_NONE, 0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_NONE", false,0,0x00000000,true), | |
119 | HOWTO(R_SPARC_NONE, 0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_NONE", false,0,0x00000000,true), | |
120 | HOWTO(R_SPARC_NONE, 0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_NONE", false,0,0x00000000,true), | |
121 | HOWTO(R_SPARC_NONE, 0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_NONE", false,0,0x00000000,true), | |
122 | HOWTO(R_SPARC_NONE, 0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_NONE", false,0,0x00000000,true), | |
123 | HOWTO(R_SPARC_NONE, 0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_NONE", false,0,0x00000000,true), | |
124 | HOWTO(R_SPARC_NONE, 0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_NONE", false,0,0x00000000,true), | |
125 | HOWTO(R_SPARC_REV32, 0,2,32,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_REV32", false,0,0xffffffff,true), | |
126 | }; | |
127 | static reloc_howto_type elf32_sparc_vtinherit_howto = | |
128 | HOWTO (R_SPARC_GNU_VTINHERIT, 0,2,0,false,0,complain_overflow_dont, NULL, "R_SPARC_GNU_VTINHERIT", false,0, 0, false); | |
129 | static reloc_howto_type elf32_sparc_vtentry_howto = | |
130 | HOWTO (R_SPARC_GNU_VTENTRY, 0,2,0,false,0,complain_overflow_dont, _bfd_elf_rel_vtable_reloc_fn,"R_SPARC_GNU_VTENTRY", false,0,0, false); | |
131 | ||
132 | ||
133 | struct elf_reloc_map { | |
134 | bfd_reloc_code_real_type bfd_reloc_val; | |
135 | unsigned char elf_reloc_val; | |
136 | }; | |
137 | ||
138 | static CONST struct elf_reloc_map sparc_reloc_map[] = | |
139 | { | |
140 | { BFD_RELOC_NONE, R_SPARC_NONE, }, | |
141 | { BFD_RELOC_16, R_SPARC_16, }, | |
142 | { BFD_RELOC_8, R_SPARC_8 }, | |
143 | { BFD_RELOC_8_PCREL, R_SPARC_DISP8 }, | |
144 | { BFD_RELOC_CTOR, R_SPARC_32 }, | |
145 | { BFD_RELOC_32, R_SPARC_32 }, | |
146 | { BFD_RELOC_32_PCREL, R_SPARC_DISP32 }, | |
147 | { BFD_RELOC_HI22, R_SPARC_HI22 }, | |
148 | { BFD_RELOC_LO10, R_SPARC_LO10, }, | |
149 | { BFD_RELOC_32_PCREL_S2, R_SPARC_WDISP30 }, | |
150 | { BFD_RELOC_SPARC22, R_SPARC_22 }, | |
151 | { BFD_RELOC_SPARC13, R_SPARC_13 }, | |
152 | { BFD_RELOC_SPARC_GOT10, R_SPARC_GOT10 }, | |
153 | { BFD_RELOC_SPARC_GOT13, R_SPARC_GOT13 }, | |
154 | { BFD_RELOC_SPARC_GOT22, R_SPARC_GOT22 }, | |
155 | { BFD_RELOC_SPARC_PC10, R_SPARC_PC10 }, | |
156 | { BFD_RELOC_SPARC_PC22, R_SPARC_PC22 }, | |
157 | { BFD_RELOC_SPARC_WPLT30, R_SPARC_WPLT30 }, | |
158 | { BFD_RELOC_SPARC_COPY, R_SPARC_COPY }, | |
159 | { BFD_RELOC_SPARC_GLOB_DAT, R_SPARC_GLOB_DAT }, | |
160 | { BFD_RELOC_SPARC_JMP_SLOT, R_SPARC_JMP_SLOT }, | |
161 | { BFD_RELOC_SPARC_RELATIVE, R_SPARC_RELATIVE }, | |
162 | { BFD_RELOC_SPARC_WDISP22, R_SPARC_WDISP22 }, | |
163 | /* ??? Doesn't dwarf use this? */ | |
164 | /*{ BFD_RELOC_SPARC_UA32, R_SPARC_UA32 }, not used?? */ | |
165 | {BFD_RELOC_SPARC_10, R_SPARC_10}, | |
166 | {BFD_RELOC_SPARC_11, R_SPARC_11}, | |
167 | {BFD_RELOC_SPARC_64, R_SPARC_64}, | |
168 | {BFD_RELOC_SPARC_OLO10, R_SPARC_OLO10}, | |
169 | {BFD_RELOC_SPARC_HH22, R_SPARC_HH22}, | |
170 | {BFD_RELOC_SPARC_HM10, R_SPARC_HM10}, | |
171 | {BFD_RELOC_SPARC_LM22, R_SPARC_LM22}, | |
172 | {BFD_RELOC_SPARC_PC_HH22, R_SPARC_PC_HH22}, | |
173 | {BFD_RELOC_SPARC_PC_HM10, R_SPARC_PC_HM10}, | |
174 | {BFD_RELOC_SPARC_PC_LM22, R_SPARC_PC_LM22}, | |
175 | {BFD_RELOC_SPARC_WDISP16, R_SPARC_WDISP16}, | |
176 | {BFD_RELOC_SPARC_WDISP19, R_SPARC_WDISP19}, | |
177 | {BFD_RELOC_SPARC_7, R_SPARC_7}, | |
178 | {BFD_RELOC_SPARC_5, R_SPARC_5}, | |
179 | {BFD_RELOC_SPARC_6, R_SPARC_6}, | |
180 | {BFD_RELOC_SPARC_REV32, R_SPARC_REV32 }, | |
181 | {BFD_RELOC_VTABLE_INHERIT, R_SPARC_GNU_VTINHERIT}, | |
182 | {BFD_RELOC_VTABLE_ENTRY, R_SPARC_GNU_VTENTRY}, | |
183 | }; | |
184 | ||
185 | static reloc_howto_type * | |
186 | elf32_sparc_reloc_type_lookup (abfd, code) | |
5f771d47 | 187 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
188 | bfd_reloc_code_real_type code; |
189 | { | |
190 | unsigned int i; | |
191 | ||
192 | switch (code) | |
193 | { | |
194 | case BFD_RELOC_VTABLE_INHERIT: | |
195 | return &elf32_sparc_vtinherit_howto; | |
196 | ||
197 | case BFD_RELOC_VTABLE_ENTRY: | |
198 | return &elf32_sparc_vtentry_howto; | |
199 | ||
200 | default: | |
201 | for (i = 0; i < sizeof (sparc_reloc_map) / sizeof (struct elf_reloc_map); i++) | |
202 | { | |
203 | if (sparc_reloc_map[i].bfd_reloc_val == code) | |
204 | return &_bfd_sparc_elf_howto_table[(int) sparc_reloc_map[i].elf_reloc_val]; | |
205 | } | |
206 | } | |
207 | bfd_set_error (bfd_error_bad_value); | |
208 | return NULL; | |
209 | } | |
210 | ||
211 | /* We need to use ELF32_R_TYPE so we have our own copy of this function, | |
212 | and elf64-sparc.c has its own copy. */ | |
213 | ||
214 | static void | |
215 | elf32_sparc_info_to_howto (abfd, cache_ptr, dst) | |
5f771d47 | 216 | bfd *abfd ATTRIBUTE_UNUSED; |
252b5132 RH |
217 | arelent *cache_ptr; |
218 | Elf_Internal_Rela *dst; | |
219 | { | |
60dac299 RH |
220 | switch (ELF32_R_TYPE(dst->r_info)) |
221 | { | |
222 | case R_SPARC_GNU_VTINHERIT: | |
223 | cache_ptr->howto = &elf32_sparc_vtinherit_howto; | |
224 | break; | |
225 | ||
226 | case R_SPARC_GNU_VTENTRY: | |
227 | cache_ptr->howto = &elf32_sparc_vtentry_howto; | |
228 | break; | |
229 | ||
230 | default: | |
231 | BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_SPARC_max_std); | |
232 | cache_ptr->howto = &_bfd_sparc_elf_howto_table[ELF32_R_TYPE(dst->r_info)]; | |
233 | } | |
252b5132 RH |
234 | } |
235 | \f | |
236 | /* For unsupported relocs. */ | |
237 | ||
238 | static bfd_reloc_status_type | |
239 | sparc_elf_notsupported_reloc (abfd, | |
240 | reloc_entry, | |
241 | symbol, | |
242 | data, | |
243 | input_section, | |
244 | output_bfd, | |
245 | error_message) | |
5f771d47 ILT |
246 | bfd *abfd ATTRIBUTE_UNUSED; |
247 | arelent *reloc_entry ATTRIBUTE_UNUSED; | |
248 | asymbol *symbol ATTRIBUTE_UNUSED; | |
249 | PTR data ATTRIBUTE_UNUSED; | |
250 | asection *input_section ATTRIBUTE_UNUSED; | |
251 | bfd *output_bfd ATTRIBUTE_UNUSED; | |
252 | char **error_message ATTRIBUTE_UNUSED; | |
252b5132 RH |
253 | { |
254 | return bfd_reloc_notsupported; | |
255 | } | |
256 | ||
257 | /* Handle the WDISP16 reloc. */ | |
258 | ||
259 | static bfd_reloc_status_type | |
260 | sparc_elf_wdisp16_reloc (abfd, | |
261 | reloc_entry, | |
262 | symbol, | |
263 | data, | |
264 | input_section, | |
265 | output_bfd, | |
266 | error_message) | |
267 | bfd *abfd; | |
268 | arelent *reloc_entry; | |
269 | asymbol *symbol; | |
270 | PTR data; | |
271 | asection *input_section; | |
272 | bfd *output_bfd; | |
5f771d47 | 273 | char **error_message ATTRIBUTE_UNUSED; |
252b5132 RH |
274 | { |
275 | bfd_vma relocation; | |
276 | bfd_vma x; | |
277 | ||
278 | if (output_bfd != (bfd *) NULL | |
279 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
280 | && (! reloc_entry->howto->partial_inplace | |
281 | || reloc_entry->addend == 0)) | |
282 | { | |
283 | reloc_entry->address += input_section->output_offset; | |
284 | return bfd_reloc_ok; | |
285 | } | |
286 | ||
287 | if (output_bfd != NULL) | |
288 | return bfd_reloc_continue; | |
289 | ||
290 | if (reloc_entry->address > input_section->_cooked_size) | |
291 | return bfd_reloc_outofrange; | |
292 | ||
293 | relocation = (symbol->value | |
294 | + symbol->section->output_section->vma | |
295 | + symbol->section->output_offset); | |
296 | relocation += reloc_entry->addend; | |
297 | relocation -= (input_section->output_section->vma | |
298 | + input_section->output_offset); | |
299 | relocation -= reloc_entry->address; | |
300 | ||
301 | x = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address); | |
302 | x |= ((((relocation >> 2) & 0xc000) << 6) | |
303 | | ((relocation >> 2) & 0x3fff)); | |
304 | bfd_put_32 (abfd, x, (bfd_byte *) data + reloc_entry->address); | |
305 | ||
306 | if ((bfd_signed_vma) relocation < - 0x40000 | |
307 | || (bfd_signed_vma) relocation > 0x3ffff) | |
308 | return bfd_reloc_overflow; | |
309 | else | |
310 | return bfd_reloc_ok; | |
311 | } | |
312 | \f | |
313 | /* Functions for the SPARC ELF linker. */ | |
314 | ||
315 | /* The name of the dynamic interpreter. This is put in the .interp | |
316 | section. */ | |
317 | ||
318 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" | |
319 | ||
320 | /* The nop opcode we use. */ | |
321 | ||
322 | #define SPARC_NOP 0x01000000 | |
323 | ||
324 | /* The size in bytes of an entry in the procedure linkage table. */ | |
325 | ||
326 | #define PLT_ENTRY_SIZE 12 | |
327 | ||
328 | /* The first four entries in a procedure linkage table are reserved, | |
329 | and the initial contents are unimportant (we zero them out). | |
330 | Subsequent entries look like this. See the SVR4 ABI SPARC | |
331 | supplement to see how this works. */ | |
332 | ||
333 | /* sethi %hi(.-.plt0),%g1. We fill in the address later. */ | |
334 | #define PLT_ENTRY_WORD0 0x03000000 | |
335 | /* b,a .plt0. We fill in the offset later. */ | |
336 | #define PLT_ENTRY_WORD1 0x30800000 | |
337 | /* nop. */ | |
338 | #define PLT_ENTRY_WORD2 SPARC_NOP | |
339 | ||
340 | /* Look through the relocs for a section during the first phase, and | |
341 | allocate space in the global offset table or procedure linkage | |
342 | table. */ | |
343 | ||
344 | static boolean | |
345 | elf32_sparc_check_relocs (abfd, info, sec, relocs) | |
346 | bfd *abfd; | |
347 | struct bfd_link_info *info; | |
348 | asection *sec; | |
349 | const Elf_Internal_Rela *relocs; | |
350 | { | |
351 | bfd *dynobj; | |
352 | Elf_Internal_Shdr *symtab_hdr; | |
353 | struct elf_link_hash_entry **sym_hashes; | |
354 | bfd_vma *local_got_offsets; | |
355 | const Elf_Internal_Rela *rel; | |
356 | const Elf_Internal_Rela *rel_end; | |
357 | asection *sgot; | |
358 | asection *srelgot; | |
359 | asection *sreloc; | |
360 | ||
361 | if (info->relocateable) | |
362 | return true; | |
363 | ||
364 | dynobj = elf_hash_table (info)->dynobj; | |
365 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
366 | sym_hashes = elf_sym_hashes (abfd); | |
367 | local_got_offsets = elf_local_got_offsets (abfd); | |
368 | ||
369 | sgot = NULL; | |
370 | srelgot = NULL; | |
371 | sreloc = NULL; | |
372 | ||
373 | rel_end = relocs + sec->reloc_count; | |
374 | for (rel = relocs; rel < rel_end; rel++) | |
375 | { | |
376 | unsigned long r_symndx; | |
377 | struct elf_link_hash_entry *h; | |
378 | ||
379 | r_symndx = ELF32_R_SYM (rel->r_info); | |
380 | if (r_symndx < symtab_hdr->sh_info) | |
381 | h = NULL; | |
382 | else | |
383 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
384 | ||
385 | switch (ELF32_R_TYPE (rel->r_info)) | |
386 | { | |
387 | case R_SPARC_GOT10: | |
388 | case R_SPARC_GOT13: | |
389 | case R_SPARC_GOT22: | |
390 | /* This symbol requires a global offset table entry. */ | |
391 | ||
392 | if (dynobj == NULL) | |
393 | { | |
394 | /* Create the .got section. */ | |
395 | elf_hash_table (info)->dynobj = dynobj = abfd; | |
396 | if (! _bfd_elf_create_got_section (dynobj, info)) | |
397 | return false; | |
398 | } | |
399 | ||
400 | if (sgot == NULL) | |
401 | { | |
402 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
403 | BFD_ASSERT (sgot != NULL); | |
404 | } | |
405 | ||
406 | if (srelgot == NULL | |
407 | && (h != NULL || info->shared)) | |
408 | { | |
409 | srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); | |
410 | if (srelgot == NULL) | |
411 | { | |
412 | srelgot = bfd_make_section (dynobj, ".rela.got"); | |
413 | if (srelgot == NULL | |
414 | || ! bfd_set_section_flags (dynobj, srelgot, | |
415 | (SEC_ALLOC | |
416 | | SEC_LOAD | |
417 | | SEC_HAS_CONTENTS | |
418 | | SEC_IN_MEMORY | |
419 | | SEC_LINKER_CREATED | |
420 | | SEC_READONLY)) | |
421 | || ! bfd_set_section_alignment (dynobj, srelgot, 2)) | |
422 | return false; | |
423 | } | |
424 | } | |
425 | ||
426 | if (h != NULL) | |
427 | { | |
428 | if (h->got.offset != (bfd_vma) -1) | |
429 | { | |
430 | /* We have already allocated space in the .got. */ | |
431 | break; | |
432 | } | |
433 | h->got.offset = sgot->_raw_size; | |
434 | ||
435 | /* Make sure this symbol is output as a dynamic symbol. */ | |
436 | if (h->dynindx == -1) | |
437 | { | |
438 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) | |
439 | return false; | |
440 | } | |
441 | ||
442 | srelgot->_raw_size += sizeof (Elf32_External_Rela); | |
443 | } | |
444 | else | |
445 | { | |
446 | /* This is a global offset table entry for a local | |
447 | symbol. */ | |
448 | if (local_got_offsets == NULL) | |
449 | { | |
450 | size_t size; | |
451 | register unsigned int i; | |
452 | ||
453 | size = symtab_hdr->sh_info * sizeof (bfd_vma); | |
454 | local_got_offsets = (bfd_vma *) bfd_alloc (abfd, size); | |
455 | if (local_got_offsets == NULL) | |
456 | return false; | |
457 | elf_local_got_offsets (abfd) = local_got_offsets; | |
458 | for (i = 0; i < symtab_hdr->sh_info; i++) | |
459 | local_got_offsets[i] = (bfd_vma) -1; | |
460 | } | |
461 | if (local_got_offsets[r_symndx] != (bfd_vma) -1) | |
462 | { | |
463 | /* We have already allocated space in the .got. */ | |
464 | break; | |
465 | } | |
466 | local_got_offsets[r_symndx] = sgot->_raw_size; | |
467 | ||
468 | if (info->shared) | |
469 | { | |
470 | /* If we are generating a shared object, we need to | |
471 | output a R_SPARC_RELATIVE reloc so that the | |
472 | dynamic linker can adjust this GOT entry. */ | |
473 | srelgot->_raw_size += sizeof (Elf32_External_Rela); | |
474 | } | |
475 | } | |
476 | ||
477 | sgot->_raw_size += 4; | |
478 | ||
479 | /* If the .got section is more than 0x1000 bytes, we add | |
480 | 0x1000 to the value of _GLOBAL_OFFSET_TABLE_, so that 13 | |
481 | bit relocations have a greater chance of working. */ | |
482 | if (sgot->_raw_size >= 0x1000 | |
483 | && elf_hash_table (info)->hgot->root.u.def.value == 0) | |
484 | elf_hash_table (info)->hgot->root.u.def.value = 0x1000; | |
485 | ||
486 | break; | |
487 | ||
488 | case R_SPARC_WPLT30: | |
489 | /* This symbol requires a procedure linkage table entry. We | |
490 | actually build the entry in adjust_dynamic_symbol, | |
491 | because this might be a case of linking PIC code without | |
492 | linking in any dynamic objects, in which case we don't | |
493 | need to generate a procedure linkage table after all. */ | |
494 | ||
495 | if (h == NULL) | |
496 | { | |
497 | /* The Solaris native assembler will generate a WPLT30 | |
498 | reloc for a local symbol if you assemble a call from | |
499 | one section to another when using -K pic. We treat | |
500 | it as WDISP30. */ | |
501 | break; | |
502 | } | |
503 | ||
504 | /* Make sure this symbol is output as a dynamic symbol. */ | |
505 | if (h->dynindx == -1) | |
506 | { | |
507 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) | |
508 | return false; | |
509 | } | |
510 | ||
511 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; | |
512 | ||
513 | break; | |
514 | ||
515 | case R_SPARC_PC10: | |
516 | case R_SPARC_PC22: | |
7843f00e ILT |
517 | if (h != NULL) |
518 | h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF; | |
519 | ||
252b5132 RH |
520 | if (h != NULL |
521 | && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) | |
522 | break; | |
523 | /* Fall through. */ | |
524 | case R_SPARC_DISP8: | |
525 | case R_SPARC_DISP16: | |
526 | case R_SPARC_DISP32: | |
527 | case R_SPARC_WDISP30: | |
528 | case R_SPARC_WDISP22: | |
529 | case R_SPARC_WDISP19: | |
530 | case R_SPARC_WDISP16: | |
7843f00e ILT |
531 | if (h != NULL) |
532 | h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF; | |
533 | ||
252b5132 RH |
534 | /* If we are linking with -Bsymbolic, we do not need to copy |
535 | a PC relative reloc against a global symbol which is | |
536 | defined in an object we are including in the link (i.e., | |
537 | DEF_REGULAR is set). FIXME: At this point we have not | |
538 | seen all the input files, so it is possible that | |
539 | DEF_REGULAR is not set now but will be set later (it is | |
540 | never cleared). This needs to be handled as in | |
541 | elf32-i386.c. */ | |
542 | if (h == NULL | |
543 | || (info->symbolic | |
544 | && (h->elf_link_hash_flags | |
545 | & ELF_LINK_HASH_DEF_REGULAR) != 0)) | |
546 | break; | |
547 | /* Fall through. */ | |
548 | case R_SPARC_8: | |
549 | case R_SPARC_16: | |
550 | case R_SPARC_32: | |
551 | case R_SPARC_HI22: | |
552 | case R_SPARC_22: | |
553 | case R_SPARC_13: | |
554 | case R_SPARC_LO10: | |
555 | case R_SPARC_UA32: | |
7843f00e ILT |
556 | if (h != NULL) |
557 | h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF; | |
558 | ||
252b5132 RH |
559 | if (info->shared) |
560 | { | |
561 | /* When creating a shared object, we must copy these | |
562 | relocs into the output file. We create a reloc | |
563 | section in dynobj and make room for the reloc. */ | |
564 | if (sreloc == NULL) | |
565 | { | |
566 | const char *name; | |
567 | ||
568 | name = (bfd_elf_string_from_elf_section | |
569 | (abfd, | |
570 | elf_elfheader (abfd)->e_shstrndx, | |
571 | elf_section_data (sec)->rel_hdr.sh_name)); | |
572 | if (name == NULL) | |
573 | return false; | |
574 | ||
575 | BFD_ASSERT (strncmp (name, ".rela", 5) == 0 | |
576 | && strcmp (bfd_get_section_name (abfd, sec), | |
577 | name + 5) == 0); | |
578 | ||
579 | sreloc = bfd_get_section_by_name (dynobj, name); | |
580 | if (sreloc == NULL) | |
581 | { | |
582 | flagword flags; | |
583 | ||
584 | sreloc = bfd_make_section (dynobj, name); | |
585 | flags = (SEC_HAS_CONTENTS | SEC_READONLY | |
586 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); | |
587 | if ((sec->flags & SEC_ALLOC) != 0) | |
588 | flags |= SEC_ALLOC | SEC_LOAD; | |
589 | if (sreloc == NULL | |
590 | || ! bfd_set_section_flags (dynobj, sreloc, flags) | |
591 | || ! bfd_set_section_alignment (dynobj, sreloc, 2)) | |
592 | return false; | |
593 | } | |
594 | } | |
595 | ||
596 | sreloc->_raw_size += sizeof (Elf32_External_Rela); | |
597 | } | |
598 | ||
599 | break; | |
600 | ||
601 | case R_SPARC_GNU_VTINHERIT: | |
602 | if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) | |
603 | return false; | |
604 | break; | |
605 | ||
606 | case R_SPARC_GNU_VTENTRY: | |
607 | if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
608 | return false; | |
609 | break; | |
610 | ||
611 | default: | |
612 | break; | |
613 | } | |
614 | } | |
615 | ||
616 | return true; | |
617 | } | |
618 | ||
619 | static asection * | |
620 | elf32_sparc_gc_mark_hook (abfd, info, rel, h, sym) | |
621 | bfd *abfd; | |
5f771d47 | 622 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
252b5132 RH |
623 | Elf_Internal_Rela *rel; |
624 | struct elf_link_hash_entry *h; | |
625 | Elf_Internal_Sym *sym; | |
626 | { | |
627 | ||
628 | if (h != NULL) | |
629 | { | |
630 | switch (ELF32_R_TYPE (rel->r_info)) | |
631 | { | |
632 | case R_SPARC_GNU_VTINHERIT: | |
633 | case R_SPARC_GNU_VTENTRY: | |
634 | break; | |
635 | ||
636 | default: | |
637 | switch (h->root.type) | |
638 | { | |
639 | case bfd_link_hash_defined: | |
640 | case bfd_link_hash_defweak: | |
641 | return h->root.u.def.section; | |
642 | ||
643 | case bfd_link_hash_common: | |
644 | return h->root.u.c.p->section; | |
e049a0de ILT |
645 | |
646 | default: | |
647 | break; | |
252b5132 RH |
648 | } |
649 | } | |
650 | } | |
651 | else | |
652 | { | |
653 | if (!(elf_bad_symtab (abfd) | |
654 | && ELF_ST_BIND (sym->st_info) != STB_LOCAL) | |
655 | && ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE) | |
656 | && sym->st_shndx != SHN_COMMON)) | |
657 | { | |
658 | return bfd_section_from_elf_index (abfd, sym->st_shndx); | |
659 | } | |
660 | } | |
661 | ||
662 | return NULL; | |
663 | } | |
664 | ||
665 | /* Update the got entry reference counts for the section being removed. */ | |
666 | static boolean | |
667 | elf32_sparc_gc_sweep_hook (abfd, info, sec, relocs) | |
668 | bfd *abfd; | |
5f771d47 | 669 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
252b5132 RH |
670 | asection *sec; |
671 | const Elf_Internal_Rela *relocs; | |
672 | { | |
673 | ||
674 | Elf_Internal_Shdr *symtab_hdr; | |
675 | struct elf_link_hash_entry **sym_hashes; | |
676 | bfd_signed_vma *local_got_refcounts; | |
677 | const Elf_Internal_Rela *rel, *relend; | |
678 | unsigned long r_symndx; | |
679 | struct elf_link_hash_entry *h; | |
680 | ||
681 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
682 | sym_hashes = elf_sym_hashes (abfd); | |
683 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
684 | ||
685 | relend = relocs + sec->reloc_count; | |
686 | for (rel = relocs; rel < relend; rel++) | |
687 | switch (ELF32_R_TYPE (rel->r_info)) | |
688 | { | |
689 | case R_SPARC_GOT10: | |
690 | case R_SPARC_GOT13: | |
691 | case R_SPARC_GOT22: | |
692 | r_symndx = ELF32_R_SYM (rel->r_info); | |
693 | if (r_symndx >= symtab_hdr->sh_info) | |
694 | { | |
695 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
696 | if (h->got.refcount > 0) | |
697 | h->got.refcount--; | |
698 | } | |
699 | else | |
700 | { | |
701 | if (local_got_refcounts[r_symndx] > 0) | |
702 | local_got_refcounts[r_symndx]--; | |
703 | } | |
704 | break; | |
705 | ||
706 | case R_SPARC_PLT32: | |
707 | case R_SPARC_HIPLT22: | |
708 | case R_SPARC_LOPLT10: | |
709 | case R_SPARC_PCPLT32: | |
710 | case R_SPARC_PCPLT10: | |
711 | r_symndx = ELF32_R_SYM (rel->r_info); | |
712 | if (r_symndx >= symtab_hdr->sh_info) | |
713 | { | |
714 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
715 | if (h->plt.refcount > 0) | |
716 | h->plt.refcount--; | |
717 | } | |
718 | break; | |
719 | ||
720 | default: | |
721 | break; | |
722 | } | |
723 | ||
724 | return true; | |
725 | } | |
726 | ||
727 | /* Adjust a symbol defined by a dynamic object and referenced by a | |
728 | regular object. The current definition is in some section of the | |
729 | dynamic object, but we're not including those sections. We have to | |
730 | change the definition to something the rest of the link can | |
731 | understand. */ | |
732 | ||
733 | static boolean | |
734 | elf32_sparc_adjust_dynamic_symbol (info, h) | |
735 | struct bfd_link_info *info; | |
736 | struct elf_link_hash_entry *h; | |
737 | { | |
738 | bfd *dynobj; | |
739 | asection *s; | |
740 | unsigned int power_of_two; | |
741 | ||
742 | dynobj = elf_hash_table (info)->dynobj; | |
743 | ||
744 | /* Make sure we know what is going on here. */ | |
745 | BFD_ASSERT (dynobj != NULL | |
746 | && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) | |
747 | || h->weakdef != NULL | |
748 | || ((h->elf_link_hash_flags | |
749 | & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
750 | && (h->elf_link_hash_flags | |
751 | & ELF_LINK_HASH_REF_REGULAR) != 0 | |
752 | && (h->elf_link_hash_flags | |
753 | & ELF_LINK_HASH_DEF_REGULAR) == 0))); | |
754 | ||
755 | /* If this is a function, put it in the procedure linkage table. We | |
756 | will fill in the contents of the procedure linkage table later | |
757 | (although we could actually do it here). The STT_NOTYPE | |
758 | condition is a hack specifically for the Oracle libraries | |
759 | delivered for Solaris; for some inexplicable reason, they define | |
760 | some of their functions as STT_NOTYPE when they really should be | |
761 | STT_FUNC. */ | |
762 | if (h->type == STT_FUNC | |
763 | || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0 | |
764 | || (h->type == STT_NOTYPE | |
765 | && (h->root.type == bfd_link_hash_defined | |
766 | || h->root.type == bfd_link_hash_defweak) | |
767 | && (h->root.u.def.section->flags & SEC_CODE) != 0)) | |
768 | { | |
769 | if (! elf_hash_table (info)->dynamic_sections_created | |
770 | || ((!info->shared || info->symbolic || h->dynindx == -1) | |
771 | && (h->elf_link_hash_flags | |
772 | & ELF_LINK_HASH_DEF_REGULAR) != 0)) | |
773 | { | |
774 | /* This case can occur if we saw a WPLT30 reloc in an input | |
775 | file, but none of the input files were dynamic objects. | |
776 | Or, when linking the main application or a -Bsymbolic | |
777 | shared library against PIC code. Or when a global symbol | |
778 | has been made private, e.g. via versioning. | |
779 | ||
780 | In these cases we know what value the symbol will resolve | |
781 | to, so we don't actually need to build a procedure linkage | |
782 | table, and we can just do a WDISP30 reloc instead. */ | |
783 | ||
784 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; | |
785 | return true; | |
786 | } | |
787 | ||
788 | s = bfd_get_section_by_name (dynobj, ".plt"); | |
789 | BFD_ASSERT (s != NULL); | |
790 | ||
791 | /* The first four entries in .plt are reserved. */ | |
792 | if (s->_raw_size == 0) | |
793 | s->_raw_size = 4 * PLT_ENTRY_SIZE; | |
794 | ||
795 | /* The procedure linkage table has a maximum size. */ | |
796 | if (s->_raw_size >= 0x400000) | |
797 | { | |
798 | bfd_set_error (bfd_error_bad_value); | |
799 | return false; | |
800 | } | |
801 | ||
802 | /* If this symbol is not defined in a regular file, and we are | |
803 | not generating a shared library, then set the symbol to this | |
804 | location in the .plt. This is required to make function | |
805 | pointers compare as equal between the normal executable and | |
806 | the shared library. */ | |
807 | if (! info->shared | |
808 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
809 | { | |
810 | h->root.u.def.section = s; | |
811 | h->root.u.def.value = s->_raw_size; | |
812 | } | |
813 | ||
814 | h->plt.offset = s->_raw_size; | |
815 | ||
816 | /* Make room for this entry. */ | |
817 | s->_raw_size += PLT_ENTRY_SIZE; | |
818 | ||
819 | /* We also need to make an entry in the .rela.plt section. */ | |
820 | ||
821 | s = bfd_get_section_by_name (dynobj, ".rela.plt"); | |
822 | BFD_ASSERT (s != NULL); | |
823 | s->_raw_size += sizeof (Elf32_External_Rela); | |
824 | ||
825 | return true; | |
826 | } | |
827 | ||
828 | /* If this is a weak symbol, and there is a real definition, the | |
829 | processor independent code will have arranged for us to see the | |
830 | real definition first, and we can just use the same value. */ | |
831 | if (h->weakdef != NULL) | |
832 | { | |
833 | BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined | |
834 | || h->weakdef->root.type == bfd_link_hash_defweak); | |
835 | h->root.u.def.section = h->weakdef->root.u.def.section; | |
836 | h->root.u.def.value = h->weakdef->root.u.def.value; | |
837 | return true; | |
838 | } | |
839 | ||
840 | /* This is a reference to a symbol defined by a dynamic object which | |
841 | is not a function. */ | |
842 | ||
843 | /* If we are creating a shared library, we must presume that the | |
844 | only references to the symbol are via the global offset table. | |
845 | For such cases we need not do anything here; the relocations will | |
846 | be handled correctly by relocate_section. */ | |
847 | if (info->shared) | |
848 | return true; | |
849 | ||
7843f00e ILT |
850 | /* If there are no references to this symbol that do not use the |
851 | GOT, we don't need to generate a copy reloc. */ | |
852 | if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0) | |
853 | return true; | |
854 | ||
252b5132 RH |
855 | /* We must allocate the symbol in our .dynbss section, which will |
856 | become part of the .bss section of the executable. There will be | |
857 | an entry for this symbol in the .dynsym section. The dynamic | |
858 | object will contain position independent code, so all references | |
859 | from the dynamic object to this symbol will go through the global | |
860 | offset table. The dynamic linker will use the .dynsym entry to | |
861 | determine the address it must put in the global offset table, so | |
862 | both the dynamic object and the regular object will refer to the | |
863 | same memory location for the variable. */ | |
864 | ||
865 | s = bfd_get_section_by_name (dynobj, ".dynbss"); | |
866 | BFD_ASSERT (s != NULL); | |
867 | ||
868 | /* We must generate a R_SPARC_COPY reloc to tell the dynamic linker | |
869 | to copy the initial value out of the dynamic object and into the | |
870 | runtime process image. We need to remember the offset into the | |
871 | .rel.bss section we are going to use. */ | |
872 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) | |
873 | { | |
874 | asection *srel; | |
875 | ||
876 | srel = bfd_get_section_by_name (dynobj, ".rela.bss"); | |
877 | BFD_ASSERT (srel != NULL); | |
878 | srel->_raw_size += sizeof (Elf32_External_Rela); | |
879 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY; | |
880 | } | |
881 | ||
882 | /* We need to figure out the alignment required for this symbol. I | |
883 | have no idea how ELF linkers handle this. */ | |
884 | power_of_two = bfd_log2 (h->size); | |
885 | if (power_of_two > 3) | |
886 | power_of_two = 3; | |
887 | ||
888 | /* Apply the required alignment. */ | |
889 | s->_raw_size = BFD_ALIGN (s->_raw_size, | |
890 | (bfd_size_type) (1 << power_of_two)); | |
891 | if (power_of_two > bfd_get_section_alignment (dynobj, s)) | |
892 | { | |
893 | if (! bfd_set_section_alignment (dynobj, s, power_of_two)) | |
894 | return false; | |
895 | } | |
896 | ||
897 | /* Define the symbol as being at this point in the section. */ | |
898 | h->root.u.def.section = s; | |
899 | h->root.u.def.value = s->_raw_size; | |
900 | ||
901 | /* Increment the section size to make room for the symbol. */ | |
902 | s->_raw_size += h->size; | |
903 | ||
904 | return true; | |
905 | } | |
906 | ||
907 | /* Set the sizes of the dynamic sections. */ | |
908 | ||
909 | static boolean | |
910 | elf32_sparc_size_dynamic_sections (output_bfd, info) | |
911 | bfd *output_bfd; | |
912 | struct bfd_link_info *info; | |
913 | { | |
914 | bfd *dynobj; | |
915 | asection *s; | |
916 | boolean reltext; | |
917 | boolean relplt; | |
918 | ||
919 | dynobj = elf_hash_table (info)->dynobj; | |
920 | BFD_ASSERT (dynobj != NULL); | |
921 | ||
922 | if (elf_hash_table (info)->dynamic_sections_created) | |
923 | { | |
924 | /* Set the contents of the .interp section to the interpreter. */ | |
925 | if (! info->shared) | |
926 | { | |
927 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
928 | BFD_ASSERT (s != NULL); | |
929 | s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER; | |
930 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; | |
931 | } | |
932 | ||
933 | /* Make space for the trailing nop in .plt. */ | |
934 | s = bfd_get_section_by_name (dynobj, ".plt"); | |
935 | BFD_ASSERT (s != NULL); | |
936 | if (s->_raw_size > 0) | |
937 | s->_raw_size += 4; | |
938 | } | |
939 | else | |
940 | { | |
941 | /* We may have created entries in the .rela.got section. | |
942 | However, if we are not creating the dynamic sections, we will | |
943 | not actually use these entries. Reset the size of .rela.got, | |
944 | which will cause it to get stripped from the output file | |
945 | below. */ | |
946 | s = bfd_get_section_by_name (dynobj, ".rela.got"); | |
947 | if (s != NULL) | |
948 | s->_raw_size = 0; | |
949 | } | |
950 | ||
951 | /* The check_relocs and adjust_dynamic_symbol entry points have | |
952 | determined the sizes of the various dynamic sections. Allocate | |
953 | memory for them. */ | |
954 | reltext = false; | |
955 | relplt = false; | |
956 | for (s = dynobj->sections; s != NULL; s = s->next) | |
957 | { | |
958 | const char *name; | |
959 | boolean strip; | |
960 | ||
961 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
962 | continue; | |
963 | ||
964 | /* It's OK to base decisions on the section name, because none | |
965 | of the dynobj section names depend upon the input files. */ | |
966 | name = bfd_get_section_name (dynobj, s); | |
967 | ||
968 | strip = false; | |
969 | ||
970 | if (strncmp (name, ".rela", 5) == 0) | |
971 | { | |
972 | if (s->_raw_size == 0) | |
973 | { | |
974 | /* If we don't need this section, strip it from the | |
975 | output file. This is to handle .rela.bss and | |
976 | .rel.plt. We must create it in | |
977 | create_dynamic_sections, because it must be created | |
978 | before the linker maps input sections to output | |
979 | sections. The linker does that before | |
980 | adjust_dynamic_symbol is called, and it is that | |
981 | function which decides whether anything needs to go | |
982 | into these sections. */ | |
983 | strip = true; | |
984 | } | |
985 | else | |
986 | { | |
987 | const char *outname; | |
988 | asection *target; | |
989 | ||
990 | /* If this relocation section applies to a read only | |
991 | section, then we probably need a DT_TEXTREL entry. */ | |
992 | outname = bfd_get_section_name (output_bfd, | |
993 | s->output_section); | |
994 | target = bfd_get_section_by_name (output_bfd, outname + 5); | |
995 | if (target != NULL | |
996 | && (target->flags & SEC_READONLY) != 0 | |
997 | && (target->flags & SEC_ALLOC) != 0) | |
998 | reltext = true; | |
999 | ||
1000 | if (strcmp (name, ".rela.plt") == 0) | |
1001 | relplt = true; | |
1002 | ||
1003 | /* We use the reloc_count field as a counter if we need | |
1004 | to copy relocs into the output file. */ | |
1005 | s->reloc_count = 0; | |
1006 | } | |
1007 | } | |
1008 | else if (strcmp (name, ".plt") != 0 | |
1009 | && strcmp (name, ".got") != 0) | |
1010 | { | |
1011 | /* It's not one of our sections, so don't allocate space. */ | |
1012 | continue; | |
1013 | } | |
1014 | ||
1015 | if (strip) | |
1016 | { | |
7f8d5fc9 | 1017 | _bfd_strip_section_from_output (info, s); |
252b5132 RH |
1018 | continue; |
1019 | } | |
1020 | ||
1021 | /* Allocate memory for the section contents. */ | |
7a9af8c4 NC |
1022 | /* FIXME: This should be a call to bfd_alloc not bfd_zalloc. |
1023 | Unused entries should be reclaimed before the section's contents | |
1024 | are written out, but at the moment this does not happen. Thus in | |
1025 | order to prevent writing out garbage, we initialise the section's | |
1026 | contents to zero. */ | |
1027 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size); | |
252b5132 RH |
1028 | if (s->contents == NULL && s->_raw_size != 0) |
1029 | return false; | |
1030 | } | |
1031 | ||
1032 | if (elf_hash_table (info)->dynamic_sections_created) | |
1033 | { | |
1034 | /* Add some entries to the .dynamic section. We fill in the | |
1035 | values later, in elf32_sparc_finish_dynamic_sections, but we | |
1036 | must add the entries now so that we get the correct size for | |
1037 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
1038 | dynamic linker and used by the debugger. */ | |
1039 | if (! info->shared) | |
1040 | { | |
1041 | if (! bfd_elf32_add_dynamic_entry (info, DT_DEBUG, 0)) | |
1042 | return false; | |
1043 | } | |
1044 | ||
1045 | if (relplt) | |
1046 | { | |
1047 | if (! bfd_elf32_add_dynamic_entry (info, DT_PLTGOT, 0) | |
1048 | || ! bfd_elf32_add_dynamic_entry (info, DT_PLTRELSZ, 0) | |
1049 | || ! bfd_elf32_add_dynamic_entry (info, DT_PLTREL, DT_RELA) | |
1050 | || ! bfd_elf32_add_dynamic_entry (info, DT_JMPREL, 0)) | |
1051 | return false; | |
1052 | } | |
1053 | ||
1054 | if (! bfd_elf32_add_dynamic_entry (info, DT_RELA, 0) | |
1055 | || ! bfd_elf32_add_dynamic_entry (info, DT_RELASZ, 0) | |
1056 | || ! bfd_elf32_add_dynamic_entry (info, DT_RELAENT, | |
1057 | sizeof (Elf32_External_Rela))) | |
1058 | return false; | |
1059 | ||
1060 | if (reltext) | |
1061 | { | |
1062 | if (! bfd_elf32_add_dynamic_entry (info, DT_TEXTREL, 0)) | |
1063 | return false; | |
d6cf2879 | 1064 | info->flags |= DF_TEXTREL; |
252b5132 RH |
1065 | } |
1066 | } | |
1067 | ||
252b5132 RH |
1068 | return true; |
1069 | } | |
1070 | ||
f7775d95 JJ |
1071 | |
1072 | #define SET_SEC_DO_RELAX(section) do { elf_section_data(section)->tdata = (void *)1; } while (0) | |
1073 | #define SEC_DO_RELAX(section) (elf_section_data(section)->tdata == (void *)1) | |
1074 | ||
1075 | /*ARGSUSED*/ | |
1076 | static boolean | |
1077 | elf32_sparc_relax_section (abfd, section, link_info, again) | |
1078 | bfd *abfd ATTRIBUTE_UNUSED; | |
1079 | asection *section ATTRIBUTE_UNUSED; | |
1080 | struct bfd_link_info *link_info ATTRIBUTE_UNUSED; | |
1081 | boolean *again; | |
1082 | { | |
1083 | *again = false; | |
1084 | SET_SEC_DO_RELAX (section); | |
1085 | return true; | |
1086 | } | |
1087 | ||
252b5132 RH |
1088 | /* Relocate a SPARC ELF section. */ |
1089 | ||
1090 | static boolean | |
1091 | elf32_sparc_relocate_section (output_bfd, info, input_bfd, input_section, | |
1092 | contents, relocs, local_syms, local_sections) | |
1093 | bfd *output_bfd; | |
1094 | struct bfd_link_info *info; | |
1095 | bfd *input_bfd; | |
1096 | asection *input_section; | |
1097 | bfd_byte *contents; | |
1098 | Elf_Internal_Rela *relocs; | |
1099 | Elf_Internal_Sym *local_syms; | |
1100 | asection **local_sections; | |
1101 | { | |
1102 | bfd *dynobj; | |
1103 | Elf_Internal_Shdr *symtab_hdr; | |
1104 | struct elf_link_hash_entry **sym_hashes; | |
1105 | bfd_vma *local_got_offsets; | |
1106 | bfd_vma got_base; | |
1107 | asection *sgot; | |
1108 | asection *splt; | |
1109 | asection *sreloc; | |
1110 | Elf_Internal_Rela *rel; | |
1111 | Elf_Internal_Rela *relend; | |
1112 | ||
1113 | dynobj = elf_hash_table (info)->dynobj; | |
1114 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
1115 | sym_hashes = elf_sym_hashes (input_bfd); | |
1116 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
1117 | ||
1118 | if (elf_hash_table (info)->hgot == NULL) | |
1119 | got_base = 0; | |
1120 | else | |
1121 | got_base = elf_hash_table (info)->hgot->root.u.def.value; | |
1122 | ||
1123 | sgot = NULL; | |
1124 | splt = NULL; | |
1125 | sreloc = NULL; | |
1126 | ||
1127 | rel = relocs; | |
1128 | relend = relocs + input_section->reloc_count; | |
1129 | for (; rel < relend; rel++) | |
1130 | { | |
1131 | int r_type; | |
1132 | reloc_howto_type *howto; | |
1133 | unsigned long r_symndx; | |
1134 | struct elf_link_hash_entry *h; | |
1135 | Elf_Internal_Sym *sym; | |
1136 | asection *sec; | |
1137 | bfd_vma relocation; | |
1138 | bfd_reloc_status_type r; | |
1139 | ||
1140 | r_type = ELF32_R_TYPE (rel->r_info); | |
1141 | ||
1142 | if (r_type == R_SPARC_GNU_VTINHERIT | |
1143 | || r_type == R_SPARC_GNU_VTENTRY) | |
1144 | continue; | |
1145 | ||
60dac299 | 1146 | if (r_type < 0 || r_type >= (int) R_SPARC_max_std) |
252b5132 RH |
1147 | { |
1148 | bfd_set_error (bfd_error_bad_value); | |
1149 | return false; | |
1150 | } | |
1151 | howto = _bfd_sparc_elf_howto_table + r_type; | |
1152 | ||
1153 | r_symndx = ELF32_R_SYM (rel->r_info); | |
1154 | ||
1155 | if (info->relocateable) | |
1156 | { | |
1157 | /* This is a relocateable link. We don't have to change | |
1158 | anything, unless the reloc is against a section symbol, | |
1159 | in which case we have to adjust according to where the | |
1160 | section symbol winds up in the output section. */ | |
1161 | if (r_symndx < symtab_hdr->sh_info) | |
1162 | { | |
1163 | sym = local_syms + r_symndx; | |
1164 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) | |
1165 | { | |
1166 | sec = local_sections[r_symndx]; | |
1167 | rel->r_addend += sec->output_offset + sym->st_value; | |
1168 | } | |
1169 | } | |
1170 | ||
1171 | continue; | |
1172 | } | |
1173 | ||
1174 | /* This is a final link. */ | |
1175 | h = NULL; | |
1176 | sym = NULL; | |
1177 | sec = NULL; | |
1178 | if (r_symndx < symtab_hdr->sh_info) | |
1179 | { | |
1180 | sym = local_syms + r_symndx; | |
1181 | sec = local_sections[r_symndx]; | |
1182 | relocation = (sec->output_section->vma | |
1183 | + sec->output_offset | |
1184 | + sym->st_value); | |
1185 | } | |
1186 | else | |
1187 | { | |
1188 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1189 | while (h->root.type == bfd_link_hash_indirect | |
1190 | || h->root.type == bfd_link_hash_warning) | |
1191 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1192 | if (h->root.type == bfd_link_hash_defined | |
1193 | || h->root.type == bfd_link_hash_defweak) | |
1194 | { | |
1195 | sec = h->root.u.def.section; | |
1196 | if ((r_type == R_SPARC_WPLT30 | |
1197 | && h->plt.offset != (bfd_vma) -1) | |
1198 | || ((r_type == R_SPARC_GOT10 | |
1199 | || r_type == R_SPARC_GOT13 | |
1200 | || r_type == R_SPARC_GOT22) | |
1201 | && elf_hash_table (info)->dynamic_sections_created | |
1202 | && (! info->shared | |
1203 | || (! info->symbolic && h->dynindx != -1) | |
1204 | || (h->elf_link_hash_flags | |
1205 | & ELF_LINK_HASH_DEF_REGULAR) == 0)) | |
1206 | || (info->shared | |
1207 | && ((! info->symbolic && h->dynindx != -1) | |
1208 | || (h->elf_link_hash_flags | |
1209 | & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
1210 | && (r_type == R_SPARC_8 | |
1211 | || r_type == R_SPARC_16 | |
1212 | || r_type == R_SPARC_32 | |
1213 | || r_type == R_SPARC_DISP8 | |
1214 | || r_type == R_SPARC_DISP16 | |
1215 | || r_type == R_SPARC_DISP32 | |
1216 | || r_type == R_SPARC_WDISP30 | |
1217 | || r_type == R_SPARC_WDISP22 | |
1218 | || r_type == R_SPARC_WDISP19 | |
1219 | || r_type == R_SPARC_WDISP16 | |
1220 | || r_type == R_SPARC_HI22 | |
1221 | || r_type == R_SPARC_22 | |
1222 | || r_type == R_SPARC_13 | |
1223 | || r_type == R_SPARC_LO10 | |
1224 | || r_type == R_SPARC_UA32 | |
1225 | || ((r_type == R_SPARC_PC10 | |
1226 | || r_type == R_SPARC_PC22) | |
1227 | && strcmp (h->root.root.string, | |
1228 | "_GLOBAL_OFFSET_TABLE_") != 0)))) | |
1229 | { | |
1230 | /* In these cases, we don't need the relocation | |
1231 | value. We check specially because in some | |
1232 | obscure cases sec->output_section will be NULL. */ | |
1233 | relocation = 0; | |
1234 | } | |
1235 | else | |
1236 | relocation = (h->root.u.def.value | |
1237 | + sec->output_section->vma | |
1238 | + sec->output_offset); | |
1239 | } | |
1240 | else if (h->root.type == bfd_link_hash_undefweak) | |
1241 | relocation = 0; | |
3a27a730 L |
1242 | else if (info->shared && !info->symbolic |
1243 | && !info->no_undefined | |
1244 | && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) | |
252b5132 RH |
1245 | relocation = 0; |
1246 | else | |
1247 | { | |
1248 | if (! ((*info->callbacks->undefined_symbol) | |
1249 | (info, h->root.root.string, input_bfd, | |
5cc7c785 | 1250 | input_section, rel->r_offset, |
3a27a730 L |
1251 | (!info->shared || info->no_undefined |
1252 | || ELF_ST_VISIBILITY (h->other))))) | |
252b5132 RH |
1253 | return false; |
1254 | relocation = 0; | |
1255 | } | |
1256 | } | |
1257 | ||
1258 | switch (r_type) | |
1259 | { | |
1260 | case R_SPARC_GOT10: | |
1261 | case R_SPARC_GOT13: | |
1262 | case R_SPARC_GOT22: | |
1263 | /* Relocation is to the entry for this symbol in the global | |
1264 | offset table. */ | |
1265 | if (sgot == NULL) | |
1266 | { | |
1267 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
1268 | BFD_ASSERT (sgot != NULL); | |
1269 | } | |
1270 | ||
1271 | if (h != NULL) | |
1272 | { | |
1273 | bfd_vma off; | |
1274 | ||
1275 | off = h->got.offset; | |
1276 | BFD_ASSERT (off != (bfd_vma) -1); | |
1277 | ||
1278 | if (! elf_hash_table (info)->dynamic_sections_created | |
1279 | || (info->shared | |
1280 | && (info->symbolic || h->dynindx == -1) | |
1281 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))) | |
1282 | { | |
1283 | /* This is actually a static link, or it is a | |
1284 | -Bsymbolic link and the symbol is defined | |
1285 | locally, or the symbol was forced to be local | |
1286 | because of a version file. We must initialize | |
1287 | this entry in the global offset table. Since the | |
1288 | offset must always be a multiple of 4, we use the | |
1289 | least significant bit to record whether we have | |
1290 | initialized it already. | |
1291 | ||
1292 | When doing a dynamic link, we create a .rela.got | |
1293 | relocation entry to initialize the value. This | |
1294 | is done in the finish_dynamic_symbol routine. */ | |
1295 | if ((off & 1) != 0) | |
1296 | off &= ~1; | |
1297 | else | |
1298 | { | |
1299 | bfd_put_32 (output_bfd, relocation, | |
1300 | sgot->contents + off); | |
1301 | h->got.offset |= 1; | |
1302 | } | |
1303 | } | |
1304 | ||
1305 | relocation = sgot->output_offset + off - got_base; | |
1306 | } | |
1307 | else | |
1308 | { | |
1309 | bfd_vma off; | |
1310 | ||
1311 | BFD_ASSERT (local_got_offsets != NULL | |
1312 | && local_got_offsets[r_symndx] != (bfd_vma) -1); | |
1313 | ||
1314 | off = local_got_offsets[r_symndx]; | |
1315 | ||
1316 | /* The offset must always be a multiple of 4. We use | |
1317 | the least significant bit to record whether we have | |
1318 | already processed this entry. */ | |
1319 | if ((off & 1) != 0) | |
1320 | off &= ~1; | |
1321 | else | |
1322 | { | |
1323 | bfd_put_32 (output_bfd, relocation, sgot->contents + off); | |
1324 | ||
1325 | if (info->shared) | |
1326 | { | |
1327 | asection *srelgot; | |
1328 | Elf_Internal_Rela outrel; | |
1329 | ||
1330 | /* We need to generate a R_SPARC_RELATIVE reloc | |
1331 | for the dynamic linker. */ | |
1332 | srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); | |
1333 | BFD_ASSERT (srelgot != NULL); | |
1334 | ||
1335 | outrel.r_offset = (sgot->output_section->vma | |
1336 | + sgot->output_offset | |
1337 | + off); | |
1338 | outrel.r_info = ELF32_R_INFO (0, R_SPARC_RELATIVE); | |
1339 | outrel.r_addend = 0; | |
1340 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, | |
1341 | (((Elf32_External_Rela *) | |
1342 | srelgot->contents) | |
1343 | + srelgot->reloc_count)); | |
1344 | ++srelgot->reloc_count; | |
1345 | } | |
1346 | ||
1347 | local_got_offsets[r_symndx] |= 1; | |
1348 | } | |
1349 | ||
1350 | relocation = sgot->output_offset + off - got_base; | |
1351 | } | |
1352 | ||
1353 | break; | |
1354 | ||
1355 | case R_SPARC_WPLT30: | |
1356 | /* Relocation is to the entry for this symbol in the | |
1357 | procedure linkage table. */ | |
1358 | ||
1359 | /* The Solaris native assembler will generate a WPLT30 reloc | |
1360 | for a local symbol if you assemble a call from one | |
1361 | section to another when using -K pic. We treat it as | |
1362 | WDISP30. */ | |
1363 | if (h == NULL) | |
1364 | break; | |
1365 | ||
1366 | if (h->plt.offset == (bfd_vma) -1) | |
1367 | { | |
1368 | /* We didn't make a PLT entry for this symbol. This | |
1369 | happens when statically linking PIC code, or when | |
1370 | using -Bsymbolic. */ | |
1371 | break; | |
1372 | } | |
1373 | ||
1374 | if (splt == NULL) | |
1375 | { | |
1376 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
1377 | BFD_ASSERT (splt != NULL); | |
1378 | } | |
1379 | ||
1380 | relocation = (splt->output_section->vma | |
1381 | + splt->output_offset | |
1382 | + h->plt.offset); | |
1383 | break; | |
1384 | ||
1385 | case R_SPARC_PC10: | |
1386 | case R_SPARC_PC22: | |
1387 | if (h != NULL | |
1388 | && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) | |
1389 | break; | |
1390 | /* Fall through. */ | |
1391 | case R_SPARC_DISP8: | |
1392 | case R_SPARC_DISP16: | |
1393 | case R_SPARC_DISP32: | |
1394 | case R_SPARC_WDISP30: | |
1395 | case R_SPARC_WDISP22: | |
1396 | case R_SPARC_WDISP19: | |
1397 | case R_SPARC_WDISP16: | |
1398 | if (h == NULL | |
1399 | || (info->symbolic | |
1400 | && (h->elf_link_hash_flags | |
1401 | & ELF_LINK_HASH_DEF_REGULAR) != 0)) | |
1402 | break; | |
1403 | /* Fall through. */ | |
1404 | case R_SPARC_8: | |
1405 | case R_SPARC_16: | |
1406 | case R_SPARC_32: | |
1407 | case R_SPARC_HI22: | |
1408 | case R_SPARC_22: | |
1409 | case R_SPARC_13: | |
1410 | case R_SPARC_LO10: | |
1411 | case R_SPARC_UA32: | |
1412 | if (info->shared) | |
1413 | { | |
1414 | Elf_Internal_Rela outrel; | |
1415 | boolean skip; | |
1416 | ||
1417 | /* When generating a shared object, these relocations | |
1418 | are copied into the output file to be resolved at run | |
1419 | time. */ | |
1420 | ||
1421 | if (sreloc == NULL) | |
1422 | { | |
1423 | const char *name; | |
1424 | ||
1425 | name = (bfd_elf_string_from_elf_section | |
1426 | (input_bfd, | |
1427 | elf_elfheader (input_bfd)->e_shstrndx, | |
1428 | elf_section_data (input_section)->rel_hdr.sh_name)); | |
1429 | if (name == NULL) | |
1430 | return false; | |
1431 | ||
1432 | BFD_ASSERT (strncmp (name, ".rela", 5) == 0 | |
1433 | && strcmp (bfd_get_section_name (input_bfd, | |
1434 | input_section), | |
1435 | name + 5) == 0); | |
1436 | ||
1437 | sreloc = bfd_get_section_by_name (dynobj, name); | |
1438 | BFD_ASSERT (sreloc != NULL); | |
1439 | } | |
1440 | ||
1441 | skip = false; | |
1442 | ||
1443 | if (elf_section_data (input_section)->stab_info == NULL) | |
1444 | outrel.r_offset = rel->r_offset; | |
1445 | else | |
1446 | { | |
1447 | bfd_vma off; | |
1448 | ||
1449 | off = (_bfd_stab_section_offset | |
1450 | (output_bfd, &elf_hash_table (info)->stab_info, | |
1451 | input_section, | |
1452 | &elf_section_data (input_section)->stab_info, | |
1453 | rel->r_offset)); | |
1454 | if (off == (bfd_vma) -1) | |
1455 | skip = true; | |
1456 | outrel.r_offset = off; | |
1457 | } | |
1458 | ||
1459 | outrel.r_offset += (input_section->output_section->vma | |
1460 | + input_section->output_offset); | |
1461 | ||
1462 | if (skip) | |
1463 | memset (&outrel, 0, sizeof outrel); | |
1464 | /* h->dynindx may be -1 if the symbol was marked to | |
1465 | become local. */ | |
1466 | else if (h != NULL | |
1467 | && ((! info->symbolic && h->dynindx != -1) | |
1468 | || (h->elf_link_hash_flags | |
1469 | & ELF_LINK_HASH_DEF_REGULAR) == 0)) | |
1470 | { | |
1471 | BFD_ASSERT (h->dynindx != -1); | |
1472 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); | |
1473 | outrel.r_addend = rel->r_addend; | |
1474 | } | |
1475 | else | |
1476 | { | |
1477 | if (r_type == R_SPARC_32) | |
1478 | { | |
1479 | outrel.r_info = ELF32_R_INFO (0, R_SPARC_RELATIVE); | |
1480 | outrel.r_addend = relocation + rel->r_addend; | |
1481 | } | |
1482 | else | |
1483 | { | |
1484 | long indx; | |
1485 | ||
1486 | if (h == NULL) | |
1487 | sec = local_sections[r_symndx]; | |
1488 | else | |
1489 | { | |
1490 | BFD_ASSERT (h->root.type == bfd_link_hash_defined | |
1491 | || (h->root.type | |
1492 | == bfd_link_hash_defweak)); | |
1493 | sec = h->root.u.def.section; | |
1494 | } | |
1495 | if (sec != NULL && bfd_is_abs_section (sec)) | |
1496 | indx = 0; | |
1497 | else if (sec == NULL || sec->owner == NULL) | |
1498 | { | |
1499 | bfd_set_error (bfd_error_bad_value); | |
1500 | return false; | |
1501 | } | |
1502 | else | |
1503 | { | |
1504 | asection *osec; | |
1505 | ||
1506 | osec = sec->output_section; | |
1507 | indx = elf_section_data (osec)->dynindx; | |
1508 | ||
1509 | /* FIXME: we really should be able to link non-pic | |
1510 | shared libraries. */ | |
1511 | if (indx == 0) | |
1512 | { | |
1513 | BFD_FAIL (); | |
1514 | (*_bfd_error_handler) | |
1515 | (_("%s: probably compiled without -fPIC?"), | |
1516 | bfd_get_filename (input_bfd)); | |
1517 | bfd_set_error (bfd_error_bad_value); | |
1518 | return false; | |
1519 | } | |
1520 | } | |
1521 | ||
1522 | outrel.r_info = ELF32_R_INFO (indx, r_type); | |
840a9995 | 1523 | outrel.r_addend = relocation + rel->r_addend; |
252b5132 RH |
1524 | } |
1525 | } | |
1526 | ||
1527 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, | |
1528 | (((Elf32_External_Rela *) | |
1529 | sreloc->contents) | |
1530 | + sreloc->reloc_count)); | |
1531 | ++sreloc->reloc_count; | |
1532 | ||
1533 | /* This reloc will be computed at runtime, so there's no | |
1534 | need to do anything now, unless this is a RELATIVE | |
1535 | reloc in an unallocated section. */ | |
1536 | if (skip | |
1537 | || (input_section->flags & SEC_ALLOC) != 0 | |
1538 | || ELF32_R_TYPE (outrel.r_info) != R_SPARC_RELATIVE) | |
1539 | continue; | |
1540 | } | |
1541 | break; | |
1542 | ||
1543 | default: | |
1544 | break; | |
1545 | } | |
1546 | ||
f7775d95 | 1547 | r = bfd_reloc_continue; |
252b5132 RH |
1548 | if (r_type == R_SPARC_WDISP16) |
1549 | { | |
1550 | bfd_vma x; | |
1551 | ||
1552 | relocation += rel->r_addend; | |
1553 | relocation -= (input_section->output_section->vma | |
1554 | + input_section->output_offset); | |
1555 | relocation -= rel->r_offset; | |
1556 | ||
1557 | x = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
1558 | x |= ((((relocation >> 2) & 0xc000) << 6) | |
1559 | | ((relocation >> 2) & 0x3fff)); | |
1560 | bfd_put_32 (input_bfd, x, contents + rel->r_offset); | |
1561 | ||
1562 | if ((bfd_signed_vma) relocation < - 0x40000 | |
1563 | || (bfd_signed_vma) relocation > 0x3ffff) | |
1564 | r = bfd_reloc_overflow; | |
1565 | else | |
1566 | r = bfd_reloc_ok; | |
1567 | } | |
1568 | else if (r_type == R_SPARC_REV32) | |
1569 | { | |
1570 | bfd_vma x; | |
1571 | ||
1572 | relocation = relocation + rel->r_addend; | |
1573 | ||
1574 | x = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
1575 | x = x + relocation; | |
1576 | bfd_putl32 (/*input_bfd,*/ x, contents + rel->r_offset); | |
1577 | r = bfd_reloc_ok; | |
1578 | } | |
f7775d95 JJ |
1579 | else if ((r_type == R_SPARC_WDISP30 || r_type == R_SPARC_WPLT30) |
1580 | && SEC_DO_RELAX (input_section) | |
1581 | && rel->r_offset + 4 < input_section->_raw_size) | |
1582 | { | |
1583 | #define G0 0 | |
1584 | #define O7 15 | |
1585 | #define XCC (2 << 20) | |
1586 | #define COND(x) (((x)&0xf)<<25) | |
1587 | #define CONDA COND(0x8) | |
1588 | #define INSN_BPA (F2(0,1) | CONDA | BPRED | XCC) | |
1589 | #define INSN_BA (F2(0,2) | CONDA) | |
1590 | #define INSN_OR F3(2, 0x2, 0) | |
1591 | #define INSN_NOP F2(0,4) | |
1592 | ||
1593 | bfd_vma x, y; | |
1594 | ||
1595 | /* If the instruction is a call with either: | |
1596 | restore | |
1597 | arithmetic instruction with rd == %o7 | |
1598 | where rs1 != %o7 and rs2 if it is register != %o7 | |
1599 | then we can optimize if the call destination is near | |
1600 | by changing the call into a branch always. */ | |
1601 | x = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
1602 | y = bfd_get_32 (input_bfd, contents + rel->r_offset + 4); | |
1603 | if ((x & OP(~0)) == OP(1) && (y & OP(~0)) == OP(2)) | |
1604 | { | |
1605 | if (((y & OP3(~0)) == OP3(0x3d) /* restore */ | |
1606 | || ((y & OP3(0x28)) == 0 /* arithmetic */ | |
1607 | && (y & RD(~0)) == RD(O7))) | |
1608 | && (y & RS1(~0)) != RS1(O7) | |
1609 | && ((y & F3I(~0)) | |
1610 | || (y & RS2(~0)) != RS2(O7))) | |
1611 | { | |
1612 | bfd_vma reloc; | |
1613 | ||
1614 | reloc = relocation + rel->r_addend - rel->r_offset; | |
1615 | reloc -= (input_section->output_section->vma | |
1616 | + input_section->output_offset); | |
1617 | ||
1618 | /* Ensure the reloc fits into simm22. */ | |
1619 | if ((reloc & 3) == 0 | |
1620 | && ((reloc & ~(bfd_vma)0x7fffff) == 0 | |
1621 | || ((reloc | 0x7fffff) == ~(bfd_vma)0))) | |
1622 | { | |
1623 | reloc >>= 2; | |
1624 | ||
1625 | /* Check whether it fits into simm19 on v9. */ | |
1626 | if (((reloc & 0x3c0000) == 0 | |
1627 | || (reloc & 0x3c0000) == 0x3c0000) | |
1628 | && (elf_elfheader (output_bfd)->e_flags & EF_SPARC_32PLUS)) | |
1629 | x = INSN_BPA | (reloc & 0x7ffff); /* ba,pt %xcc */ | |
1630 | else | |
1631 | x = INSN_BA | (reloc & 0x3fffff); /* ba */ | |
1632 | bfd_put_32 (input_bfd, x, contents + rel->r_offset); | |
1633 | r = bfd_reloc_ok; | |
1634 | if (rel->r_offset >= 4 | |
1635 | && (y & (0xffffffff ^ RS1(~0))) | |
1636 | == (INSN_OR | RD(O7) | RS2(G0))) | |
1637 | { | |
1638 | bfd_vma z; | |
1639 | unsigned int reg; | |
1640 | ||
1641 | z = bfd_get_32 (input_bfd, | |
1642 | contents + rel->r_offset - 4); | |
1643 | if ((z & (0xffffffff ^ RD(~0))) | |
1644 | != (INSN_OR | RS1(O7) | RS2(G0))) | |
1645 | break; | |
1646 | ||
1647 | /* The sequence was | |
1648 | or %o7, %g0, %rN | |
1649 | call foo | |
1650 | or %rN, %g0, %o7 | |
1651 | ||
1652 | If call foo was replaced with ba, replace | |
1653 | or %rN, %g0, %o7 with nop. */ | |
1654 | ||
1655 | reg = (y & RS1(~0)) >> 14; | |
1656 | if (reg != ((z & RD(~0)) >> 25) | |
1657 | || reg == G0 || reg == O7) | |
1658 | break; | |
1659 | ||
1660 | bfd_put_32 (input_bfd, INSN_NOP, | |
1661 | contents + rel->r_offset + 4); | |
1662 | } | |
1663 | ||
1664 | } | |
1665 | } | |
1666 | } | |
1667 | } | |
1668 | ||
1669 | if (r == bfd_reloc_continue) | |
252b5132 RH |
1670 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
1671 | contents, rel->r_offset, | |
1672 | relocation, rel->r_addend); | |
1673 | ||
1674 | ||
1675 | if (r != bfd_reloc_ok) | |
1676 | { | |
1677 | switch (r) | |
1678 | { | |
1679 | default: | |
1680 | case bfd_reloc_outofrange: | |
1681 | abort (); | |
1682 | case bfd_reloc_overflow: | |
1683 | { | |
1684 | const char *name; | |
1685 | ||
1686 | if (h != NULL) | |
1687 | name = h->root.root.string; | |
1688 | else | |
1689 | { | |
1690 | name = bfd_elf_string_from_elf_section (input_bfd, | |
1691 | symtab_hdr->sh_link, | |
1692 | sym->st_name); | |
1693 | if (name == NULL) | |
1694 | return false; | |
1695 | if (*name == '\0') | |
1696 | name = bfd_section_name (input_bfd, sec); | |
1697 | } | |
1698 | if (! ((*info->callbacks->reloc_overflow) | |
1699 | (info, name, howto->name, (bfd_vma) 0, | |
1700 | input_bfd, input_section, rel->r_offset))) | |
1701 | return false; | |
1702 | } | |
1703 | break; | |
1704 | } | |
1705 | } | |
1706 | } | |
1707 | ||
1708 | return true; | |
1709 | } | |
1710 | ||
1711 | /* Finish up dynamic symbol handling. We set the contents of various | |
1712 | dynamic sections here. */ | |
1713 | ||
1714 | static boolean | |
1715 | elf32_sparc_finish_dynamic_symbol (output_bfd, info, h, sym) | |
1716 | bfd *output_bfd; | |
1717 | struct bfd_link_info *info; | |
1718 | struct elf_link_hash_entry *h; | |
1719 | Elf_Internal_Sym *sym; | |
1720 | { | |
1721 | bfd *dynobj; | |
1722 | ||
1723 | dynobj = elf_hash_table (info)->dynobj; | |
1724 | ||
1725 | if (h->plt.offset != (bfd_vma) -1) | |
1726 | { | |
1727 | asection *splt; | |
1728 | asection *srela; | |
1729 | Elf_Internal_Rela rela; | |
1730 | ||
1731 | /* This symbol has an entry in the procedure linkage table. Set | |
1732 | it up. */ | |
1733 | ||
1734 | BFD_ASSERT (h->dynindx != -1); | |
1735 | ||
1736 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
1737 | srela = bfd_get_section_by_name (dynobj, ".rela.plt"); | |
1738 | BFD_ASSERT (splt != NULL && srela != NULL); | |
1739 | ||
1740 | /* Fill in the entry in the procedure linkage table. */ | |
1741 | bfd_put_32 (output_bfd, | |
1742 | PLT_ENTRY_WORD0 + h->plt.offset, | |
1743 | splt->contents + h->plt.offset); | |
1744 | bfd_put_32 (output_bfd, | |
1745 | (PLT_ENTRY_WORD1 | |
1746 | + (((- (h->plt.offset + 4)) >> 2) & 0x3fffff)), | |
1747 | splt->contents + h->plt.offset + 4); | |
1748 | bfd_put_32 (output_bfd, PLT_ENTRY_WORD2, | |
1749 | splt->contents + h->plt.offset + 8); | |
1750 | ||
1751 | /* Fill in the entry in the .rela.plt section. */ | |
1752 | rela.r_offset = (splt->output_section->vma | |
1753 | + splt->output_offset | |
1754 | + h->plt.offset); | |
1755 | rela.r_info = ELF32_R_INFO (h->dynindx, R_SPARC_JMP_SLOT); | |
1756 | rela.r_addend = 0; | |
1757 | bfd_elf32_swap_reloca_out (output_bfd, &rela, | |
1758 | ((Elf32_External_Rela *) srela->contents | |
1759 | + h->plt.offset / PLT_ENTRY_SIZE - 4)); | |
1760 | ||
1761 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
1762 | { | |
1763 | /* Mark the symbol as undefined, rather than as defined in | |
1764 | the .plt section. Leave the value alone. */ | |
1765 | sym->st_shndx = SHN_UNDEF; | |
1766 | } | |
1767 | } | |
1768 | ||
1769 | if (h->got.offset != (bfd_vma) -1) | |
1770 | { | |
1771 | asection *sgot; | |
1772 | asection *srela; | |
1773 | Elf_Internal_Rela rela; | |
1774 | ||
1775 | /* This symbol has an entry in the global offset table. Set it | |
1776 | up. */ | |
1777 | ||
1778 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
1779 | srela = bfd_get_section_by_name (dynobj, ".rela.got"); | |
1780 | BFD_ASSERT (sgot != NULL && srela != NULL); | |
1781 | ||
1782 | rela.r_offset = (sgot->output_section->vma | |
1783 | + sgot->output_offset | |
1784 | + (h->got.offset &~ 1)); | |
1785 | ||
1786 | /* If this is a -Bsymbolic link, and the symbol is defined | |
1787 | locally, we just want to emit a RELATIVE reloc. Likewise if | |
1788 | the symbol was forced to be local because of a version file. | |
1789 | The entry in the global offset table will already have been | |
1790 | initialized in the relocate_section function. */ | |
1791 | if (info->shared | |
1792 | && (info->symbolic || h->dynindx == -1) | |
1793 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)) | |
1794 | rela.r_info = ELF32_R_INFO (0, R_SPARC_RELATIVE); | |
1795 | else | |
1796 | { | |
1797 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset); | |
1798 | rela.r_info = ELF32_R_INFO (h->dynindx, R_SPARC_GLOB_DAT); | |
1799 | } | |
1800 | ||
1801 | rela.r_addend = 0; | |
1802 | bfd_elf32_swap_reloca_out (output_bfd, &rela, | |
1803 | ((Elf32_External_Rela *) srela->contents | |
1804 | + srela->reloc_count)); | |
1805 | ++srela->reloc_count; | |
1806 | } | |
1807 | ||
1808 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0) | |
1809 | { | |
1810 | asection *s; | |
1811 | Elf_Internal_Rela rela; | |
1812 | ||
1813 | /* This symbols needs a copy reloc. Set it up. */ | |
1814 | ||
1815 | BFD_ASSERT (h->dynindx != -1); | |
1816 | ||
1817 | s = bfd_get_section_by_name (h->root.u.def.section->owner, | |
1818 | ".rela.bss"); | |
1819 | BFD_ASSERT (s != NULL); | |
1820 | ||
1821 | rela.r_offset = (h->root.u.def.value | |
1822 | + h->root.u.def.section->output_section->vma | |
1823 | + h->root.u.def.section->output_offset); | |
1824 | rela.r_info = ELF32_R_INFO (h->dynindx, R_SPARC_COPY); | |
1825 | rela.r_addend = 0; | |
1826 | bfd_elf32_swap_reloca_out (output_bfd, &rela, | |
1827 | ((Elf32_External_Rela *) s->contents | |
1828 | + s->reloc_count)); | |
1829 | ++s->reloc_count; | |
1830 | } | |
1831 | ||
1832 | /* Mark some specially defined symbols as absolute. */ | |
1833 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 | |
1834 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0 | |
1835 | || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0) | |
1836 | sym->st_shndx = SHN_ABS; | |
1837 | ||
1838 | return true; | |
1839 | } | |
1840 | ||
1841 | /* Finish up the dynamic sections. */ | |
1842 | ||
1843 | static boolean | |
1844 | elf32_sparc_finish_dynamic_sections (output_bfd, info) | |
1845 | bfd *output_bfd; | |
1846 | struct bfd_link_info *info; | |
1847 | { | |
1848 | bfd *dynobj; | |
1849 | asection *sdyn; | |
1850 | asection *sgot; | |
1851 | ||
1852 | dynobj = elf_hash_table (info)->dynobj; | |
1853 | ||
1854 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); | |
1855 | ||
1856 | if (elf_hash_table (info)->dynamic_sections_created) | |
1857 | { | |
1858 | asection *splt; | |
1859 | Elf32_External_Dyn *dyncon, *dynconend; | |
1860 | ||
1861 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
1862 | BFD_ASSERT (splt != NULL && sdyn != NULL); | |
1863 | ||
1864 | dyncon = (Elf32_External_Dyn *) sdyn->contents; | |
1865 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size); | |
1866 | for (; dyncon < dynconend; dyncon++) | |
1867 | { | |
1868 | Elf_Internal_Dyn dyn; | |
1869 | const char *name; | |
1870 | boolean size; | |
1871 | ||
1872 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); | |
1873 | ||
1874 | switch (dyn.d_tag) | |
1875 | { | |
1876 | case DT_PLTGOT: name = ".plt"; size = false; break; | |
1877 | case DT_PLTRELSZ: name = ".rela.plt"; size = true; break; | |
1878 | case DT_JMPREL: name = ".rela.plt"; size = false; break; | |
1879 | default: name = NULL; size = false; break; | |
1880 | } | |
1881 | ||
1882 | if (name != NULL) | |
1883 | { | |
1884 | asection *s; | |
1885 | ||
1886 | s = bfd_get_section_by_name (output_bfd, name); | |
1887 | if (s == NULL) | |
1888 | dyn.d_un.d_val = 0; | |
1889 | else | |
1890 | { | |
1891 | if (! size) | |
1892 | dyn.d_un.d_ptr = s->vma; | |
1893 | else | |
1894 | { | |
1895 | if (s->_cooked_size != 0) | |
1896 | dyn.d_un.d_val = s->_cooked_size; | |
1897 | else | |
1898 | dyn.d_un.d_val = s->_raw_size; | |
1899 | } | |
1900 | } | |
1901 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
1902 | } | |
1903 | } | |
1904 | ||
1905 | /* Clear the first four entries in the procedure linkage table, | |
1906 | and put a nop in the last four bytes. */ | |
1907 | if (splt->_raw_size > 0) | |
1908 | { | |
1909 | memset (splt->contents, 0, 4 * PLT_ENTRY_SIZE); | |
1910 | bfd_put_32 (output_bfd, SPARC_NOP, | |
1911 | splt->contents + splt->_raw_size - 4); | |
1912 | } | |
1913 | ||
1914 | elf_section_data (splt->output_section)->this_hdr.sh_entsize = | |
1915 | PLT_ENTRY_SIZE; | |
1916 | } | |
1917 | ||
1918 | /* Set the first entry in the global offset table to the address of | |
1919 | the dynamic section. */ | |
1920 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
1921 | BFD_ASSERT (sgot != NULL); | |
1922 | if (sgot->_raw_size > 0) | |
1923 | { | |
1924 | if (sdyn == NULL) | |
1925 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); | |
1926 | else | |
1927 | bfd_put_32 (output_bfd, | |
1928 | sdyn->output_section->vma + sdyn->output_offset, | |
1929 | sgot->contents); | |
1930 | } | |
1931 | ||
1932 | elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; | |
1933 | ||
252b5132 RH |
1934 | return true; |
1935 | } | |
1936 | \f | |
1937 | /* Functions for dealing with the e_flags field. | |
1938 | ||
1939 | We don't define set_private_flags or copy_private_bfd_data because | |
1940 | the only currently defined values are based on the bfd mach number, | |
1941 | so we use the latter instead and defer setting e_flags until the | |
1942 | file is written out. */ | |
1943 | ||
1944 | /* Merge backend specific data from an object file to the output | |
1945 | object file when linking. */ | |
1946 | ||
1947 | static boolean | |
1948 | elf32_sparc_merge_private_bfd_data (ibfd, obfd) | |
1949 | bfd *ibfd; | |
1950 | bfd *obfd; | |
1951 | { | |
1952 | boolean error; | |
5f771d47 ILT |
1953 | /* FIXME: This should not be static. */ |
1954 | static unsigned long previous_ibfd_e_flags = (unsigned long) -1; | |
252b5132 RH |
1955 | |
1956 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour | |
1957 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
1958 | return true; | |
1959 | ||
1960 | error = false; | |
1961 | ||
1962 | #if 0 | |
1963 | /* ??? The native linker doesn't do this so we can't (otherwise gcc would | |
1964 | have to know which linker is being used). Instead, the native linker | |
1965 | bumps up the architecture level when it has to. However, I still think | |
1966 | warnings like these are good, so it would be nice to have them turned on | |
1967 | by some option. */ | |
1968 | ||
1969 | /* If the output machine is normal sparc, we can't allow v9 input files. */ | |
1970 | if (bfd_get_mach (obfd) == bfd_mach_sparc | |
1971 | && (bfd_get_mach (ibfd) == bfd_mach_sparc_v8plus | |
1972 | || bfd_get_mach (ibfd) == bfd_mach_sparc_v8plusa)) | |
1973 | { | |
1974 | error = true; | |
1975 | (*_bfd_error_handler) | |
1976 | (_("%s: compiled for a v8plus system and target is v8"), | |
1977 | bfd_get_filename (ibfd)); | |
1978 | } | |
1979 | /* If the output machine is v9, we can't allow v9+vis input files. */ | |
1980 | if (bfd_get_mach (obfd) == bfd_mach_sparc_v8plus | |
1981 | && bfd_get_mach (ibfd) == bfd_mach_sparc_v8plusa) | |
1982 | { | |
1983 | error = true; | |
1984 | (*_bfd_error_handler) | |
1985 | (_("%s: compiled for a v8plusa system and target is v8plus"), | |
1986 | bfd_get_filename (ibfd)); | |
1987 | } | |
1988 | #else | |
1989 | if (bfd_get_mach (ibfd) >= bfd_mach_sparc_v9) | |
1990 | { | |
1991 | error = true; | |
1992 | (*_bfd_error_handler) | |
1993 | (_("%s: compiled for a 64 bit system and target is 32 bit"), | |
1994 | bfd_get_filename (ibfd)); | |
1995 | } | |
37fb6db1 ILT |
1996 | else if ((ibfd->flags & DYNAMIC) == 0) |
1997 | { | |
1998 | if (bfd_get_mach (obfd) < bfd_get_mach (ibfd)) | |
1999 | bfd_set_arch_mach (obfd, bfd_arch_sparc, bfd_get_mach (ibfd)); | |
2000 | } | |
252b5132 RH |
2001 | #endif |
2002 | ||
2003 | if (((elf_elfheader (ibfd)->e_flags & EF_SPARC_LEDATA) | |
2004 | != previous_ibfd_e_flags) | |
5f771d47 | 2005 | && previous_ibfd_e_flags != (unsigned long) -1) |
252b5132 RH |
2006 | { |
2007 | (*_bfd_error_handler) | |
2008 | (_("%s: linking little endian files with big endian files"), | |
2009 | bfd_get_filename (ibfd)); | |
2010 | error = true; | |
2011 | } | |
2012 | previous_ibfd_e_flags = elf_elfheader (ibfd)->e_flags & EF_SPARC_LEDATA; | |
2013 | ||
2014 | if (error) | |
2015 | { | |
2016 | bfd_set_error (bfd_error_bad_value); | |
2017 | return false; | |
2018 | } | |
2019 | ||
2020 | return true; | |
2021 | } | |
2022 | \f | |
2023 | /* Set the right machine number. */ | |
2024 | ||
2025 | static boolean | |
2026 | elf32_sparc_object_p (abfd) | |
2027 | bfd *abfd; | |
2028 | { | |
2029 | if (elf_elfheader (abfd)->e_machine == EM_SPARC32PLUS) | |
2030 | { | |
2031 | if (elf_elfheader (abfd)->e_flags & EF_SPARC_SUN_US1) | |
2032 | return bfd_default_set_arch_mach (abfd, bfd_arch_sparc, | |
2033 | bfd_mach_sparc_v8plusa); | |
2034 | else if (elf_elfheader (abfd)->e_flags & EF_SPARC_32PLUS) | |
2035 | return bfd_default_set_arch_mach (abfd, bfd_arch_sparc, | |
2036 | bfd_mach_sparc_v8plus); | |
2037 | else | |
2038 | return false; | |
2039 | } | |
2040 | else if (elf_elfheader (abfd)->e_flags & EF_SPARC_LEDATA) | |
2041 | return bfd_default_set_arch_mach (abfd, bfd_arch_sparc, | |
2042 | bfd_mach_sparc_sparclite_le); | |
2043 | else | |
2044 | return bfd_default_set_arch_mach (abfd, bfd_arch_sparc, bfd_mach_sparc); | |
2045 | } | |
2046 | ||
2047 | /* The final processing done just before writing out the object file. | |
2048 | We need to set the e_machine field appropriately. */ | |
2049 | ||
2050 | static void | |
2051 | elf32_sparc_final_write_processing (abfd, linker) | |
2052 | bfd *abfd; | |
5f771d47 | 2053 | boolean linker ATTRIBUTE_UNUSED; |
252b5132 RH |
2054 | { |
2055 | switch (bfd_get_mach (abfd)) | |
2056 | { | |
2057 | case bfd_mach_sparc : | |
2058 | break; /* nothing to do */ | |
2059 | case bfd_mach_sparc_v8plus : | |
2060 | elf_elfheader (abfd)->e_machine = EM_SPARC32PLUS; | |
2061 | elf_elfheader (abfd)->e_flags &=~ EF_SPARC_32PLUS_MASK; | |
2062 | elf_elfheader (abfd)->e_flags |= EF_SPARC_32PLUS; | |
2063 | break; | |
2064 | case bfd_mach_sparc_v8plusa : | |
2065 | elf_elfheader (abfd)->e_machine = EM_SPARC32PLUS; | |
2066 | elf_elfheader (abfd)->e_flags &=~ EF_SPARC_32PLUS_MASK; | |
2067 | elf_elfheader (abfd)->e_flags |= EF_SPARC_32PLUS | EF_SPARC_SUN_US1; | |
2068 | break; | |
2069 | case bfd_mach_sparc_sparclite_le : | |
2070 | elf_elfheader (abfd)->e_machine = EM_SPARC; | |
2071 | elf_elfheader (abfd)->e_flags |= EF_SPARC_LEDATA; | |
2072 | break; | |
2073 | default : | |
2074 | abort (); | |
2075 | break; | |
2076 | } | |
2077 | } | |
2078 | \f | |
2079 | #define TARGET_BIG_SYM bfd_elf32_sparc_vec | |
2080 | #define TARGET_BIG_NAME "elf32-sparc" | |
2081 | #define ELF_ARCH bfd_arch_sparc | |
2082 | #define ELF_MACHINE_CODE EM_SPARC | |
2083 | #define ELF_MACHINE_ALT1 EM_SPARC32PLUS | |
2084 | #define ELF_MAXPAGESIZE 0x10000 | |
2085 | ||
2086 | #define bfd_elf32_bfd_reloc_type_lookup elf32_sparc_reloc_type_lookup | |
f7775d95 | 2087 | #define bfd_elf32_bfd_relax_section elf32_sparc_relax_section |
252b5132 RH |
2088 | #define elf_info_to_howto elf32_sparc_info_to_howto |
2089 | #define elf_backend_create_dynamic_sections \ | |
2090 | _bfd_elf_create_dynamic_sections | |
2091 | #define elf_backend_check_relocs elf32_sparc_check_relocs | |
2092 | #define elf_backend_adjust_dynamic_symbol \ | |
2093 | elf32_sparc_adjust_dynamic_symbol | |
2094 | #define elf_backend_size_dynamic_sections \ | |
2095 | elf32_sparc_size_dynamic_sections | |
2096 | #define elf_backend_relocate_section elf32_sparc_relocate_section | |
2097 | #define elf_backend_finish_dynamic_symbol \ | |
2098 | elf32_sparc_finish_dynamic_symbol | |
2099 | #define elf_backend_finish_dynamic_sections \ | |
2100 | elf32_sparc_finish_dynamic_sections | |
2101 | #define bfd_elf32_bfd_merge_private_bfd_data \ | |
2102 | elf32_sparc_merge_private_bfd_data | |
2103 | #define elf_backend_object_p elf32_sparc_object_p | |
2104 | #define elf_backend_final_write_processing \ | |
2105 | elf32_sparc_final_write_processing | |
2106 | #define elf_backend_gc_mark_hook elf32_sparc_gc_mark_hook | |
2107 | #define elf_backend_gc_sweep_hook elf32_sparc_gc_sweep_hook | |
2108 | ||
2109 | #define elf_backend_can_gc_sections 1 | |
2110 | #define elf_backend_want_got_plt 0 | |
2111 | #define elf_backend_plt_readonly 0 | |
2112 | #define elf_backend_want_plt_sym 1 | |
2113 | #define elf_backend_got_header_size 4 | |
2114 | #define elf_backend_plt_header_size (4*PLT_ENTRY_SIZE) | |
2115 | ||
2116 | #include "elf32-target.h" |