1 /* SPARC-specific support for 64-bit ELF
2 Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
3 2003, 2004 Free Software Foundation, Inc.
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 "libbfd.h"
24 #include "elf-bfd.h"
25 #include "opcode/sparc.h"
26
27 /* This is defined if one wants to build upward compatible binaries
28 with the original sparc64-elf toolchain. The support is kept in for
29 now but is turned off by default. dje 970930 */
30 /*#define SPARC64_OLD_RELOCS*/
31
32 #include "elf/sparc.h"
33
34 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */
35 #define MINUS_ONE (~ (bfd_vma) 0)
36
37 static struct bfd_link_hash_table * sparc64_elf_bfd_link_hash_table_create
38 PARAMS ((bfd *));
39 static bfd_reloc_status_type init_insn_reloc
40 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *,
41 bfd *, bfd_vma *, bfd_vma *));
42 static reloc_howto_type *sparc64_elf_reloc_type_lookup
43 PARAMS ((bfd *, bfd_reloc_code_real_type));
44 static void sparc64_elf_info_to_howto
45 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
46
47 static void sparc64_elf_build_plt
48 PARAMS ((bfd *, unsigned char *, int));
49 static bfd_vma sparc64_elf_plt_entry_offset
50 PARAMS ((bfd_vma));
51 static bfd_vma sparc64_elf_plt_ptr_offset
52 PARAMS ((bfd_vma, bfd_vma));
53
54 static bfd_boolean sparc64_elf_check_relocs
55 PARAMS ((bfd *, struct bfd_link_info *, asection *sec,
56 const Elf_Internal_Rela *));
57 static bfd_boolean sparc64_elf_adjust_dynamic_symbol
58 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
59 static bfd_boolean sparc64_elf_size_dynamic_sections
60 PARAMS ((bfd *, struct bfd_link_info *));
61 static int sparc64_elf_get_symbol_type
62 PARAMS (( Elf_Internal_Sym *, int));
63 static bfd_boolean sparc64_elf_add_symbol_hook
64 PARAMS ((bfd *, struct bfd_link_info *, Elf_Internal_Sym *,
65 const char **, flagword *, asection **, bfd_vma *));
66 static bfd_boolean sparc64_elf_output_arch_syms
67 PARAMS ((bfd *, struct bfd_link_info *, PTR,
68 bfd_boolean (*) (PTR, const char *, Elf_Internal_Sym *,
69 asection *, struct elf_link_hash_entry *)));
70 static void sparc64_elf_symbol_processing
71 PARAMS ((bfd *, asymbol *));
72
73 static bfd_boolean sparc64_elf_merge_private_bfd_data
74 PARAMS ((bfd *, bfd *));
75
76 static bfd_boolean sparc64_elf_fake_sections
77 PARAMS ((bfd *, Elf_Internal_Shdr *, asection *));
78
79 static const char *sparc64_elf_print_symbol_all
80 PARAMS ((bfd *, PTR, asymbol *));
81 static bfd_boolean sparc64_elf_new_section_hook
82 PARAMS ((bfd *, asection *));
83 static bfd_boolean sparc64_elf_relax_section
84 PARAMS ((bfd *, asection *, struct bfd_link_info *, bfd_boolean *));
85 static bfd_boolean sparc64_elf_relocate_section
86 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
87 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
88 static bfd_boolean sparc64_elf_finish_dynamic_symbol
89 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
90 Elf_Internal_Sym *));
91 static bfd_boolean sparc64_elf_finish_dynamic_sections
92 PARAMS ((bfd *, struct bfd_link_info *));
93 static bfd_boolean sparc64_elf_object_p PARAMS ((bfd *));
94 static long sparc64_elf_get_reloc_upper_bound PARAMS ((bfd *, asection *));
95 static long sparc64_elf_get_dynamic_reloc_upper_bound PARAMS ((bfd *));
96 static bfd_boolean sparc64_elf_slurp_one_reloc_table
97 PARAMS ((bfd *, asection *, Elf_Internal_Shdr *, asymbol **, bfd_boolean));
98 static bfd_boolean sparc64_elf_slurp_reloc_table
99 PARAMS ((bfd *, asection *, asymbol **, bfd_boolean));
100 static long sparc64_elf_canonicalize_reloc
101 PARAMS ((bfd *, asection *, arelent **, asymbol **));
102 static long sparc64_elf_canonicalize_dynamic_reloc
103 PARAMS ((bfd *, arelent **, asymbol **));
104 static void sparc64_elf_write_relocs PARAMS ((bfd *, asection *, PTR));
105 static enum elf_reloc_type_class sparc64_elf_reloc_type_class
106 PARAMS ((const Elf_Internal_Rela *));
107
108 /* The relocation "howto" table. */
109
110 static bfd_reloc_status_type sparc_elf_notsup_reloc
111 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
112 static bfd_reloc_status_type sparc_elf_wdisp16_reloc
113 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
114 static bfd_reloc_status_type sparc_elf_hix22_reloc
115 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
116 static bfd_reloc_status_type sparc_elf_lox10_reloc
117 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
118
119 static reloc_howto_type sparc64_elf_howto_table[] =
120 {
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_8, 0,0, 8,FALSE,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_8", FALSE,0,0x000000ff,TRUE),
123 HOWTO(R_SPARC_16, 0,1,16,FALSE,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_16", FALSE,0,0x0000ffff,TRUE),
124 HOWTO(R_SPARC_32, 0,2,32,FALSE,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_32", FALSE,0,0xffffffff,TRUE),
125 HOWTO(R_SPARC_DISP8, 0,0, 8,TRUE, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_DISP8", FALSE,0,0x000000ff,TRUE),
126 HOWTO(R_SPARC_DISP16, 0,1,16,TRUE, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_DISP16", FALSE,0,0x0000ffff,TRUE),
127 HOWTO(R_SPARC_DISP32, 0,2,32,TRUE, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_DISP32", FALSE,0,0xffffffff,TRUE),
128 HOWTO(R_SPARC_WDISP30, 2,2,30,TRUE, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_WDISP30", FALSE,0,0x3fffffff,TRUE),
129 HOWTO(R_SPARC_WDISP22, 2,2,22,TRUE, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_WDISP22", FALSE,0,0x003fffff,TRUE),
130 HOWTO(R_SPARC_HI22, 10,2,22,FALSE,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_HI22", FALSE,0,0x003fffff,TRUE),
131 HOWTO(R_SPARC_22, 0,2,22,FALSE,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_22", FALSE,0,0x003fffff,TRUE),
132 HOWTO(R_SPARC_13, 0,2,13,FALSE,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_13", FALSE,0,0x00001fff,TRUE),
133 HOWTO(R_SPARC_LO10, 0,2,10,FALSE,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_LO10", FALSE,0,0x000003ff,TRUE),
134 HOWTO(R_SPARC_GOT10, 0,2,10,FALSE,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_GOT10", FALSE,0,0x000003ff,TRUE),
135 HOWTO(R_SPARC_GOT13, 0,2,13,FALSE,0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_GOT13", FALSE,0,0x00001fff,TRUE),
136 HOWTO(R_SPARC_GOT22, 10,2,22,FALSE,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_GOT22", FALSE,0,0x003fffff,TRUE),
137 HOWTO(R_SPARC_PC10, 0,2,10,TRUE, 0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_PC10", FALSE,0,0x000003ff,TRUE),
138 HOWTO(R_SPARC_PC22, 10,2,22,TRUE, 0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_PC22", FALSE,0,0x003fffff,TRUE),
139 HOWTO(R_SPARC_WPLT30, 2,2,30,TRUE, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_WPLT30", FALSE,0,0x3fffffff,TRUE),
140 HOWTO(R_SPARC_COPY, 0,0,00,FALSE,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_COPY", FALSE,0,0x00000000,TRUE),
141 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),
142 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),
143 HOWTO(R_SPARC_RELATIVE, 0,0,00,FALSE,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_RELATIVE",FALSE,0,0x00000000,TRUE),
144 HOWTO(R_SPARC_UA32, 0,2,32,FALSE,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_UA32", FALSE,0,0xffffffff,TRUE),
145 #ifndef SPARC64_OLD_RELOCS
146 HOWTO(R_SPARC_PLT32, 0,2,32,FALSE,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_PLT32", FALSE,0,0xffffffff,TRUE),
147 /* These aren't implemented yet. */
148 HOWTO(R_SPARC_HIPLT22, 0,0,00,FALSE,0,complain_overflow_dont, sparc_elf_notsup_reloc, "R_SPARC_HIPLT22", FALSE,0,0x00000000,TRUE),
149 HOWTO(R_SPARC_LOPLT10, 0,0,00,FALSE,0,complain_overflow_dont, sparc_elf_notsup_reloc, "R_SPARC_LOPLT10", FALSE,0,0x00000000,TRUE),
150 HOWTO(R_SPARC_PCPLT32, 0,0,00,FALSE,0,complain_overflow_dont, sparc_elf_notsup_reloc, "R_SPARC_PCPLT32", FALSE,0,0x00000000,TRUE),
151 HOWTO(R_SPARC_PCPLT22, 0,0,00,FALSE,0,complain_overflow_dont, sparc_elf_notsup_reloc, "R_SPARC_PCPLT22", FALSE,0,0x00000000,TRUE),
152 HOWTO(R_SPARC_PCPLT10, 0,0,00,FALSE,0,complain_overflow_dont, sparc_elf_notsup_reloc, "R_SPARC_PCPLT10", FALSE,0,0x00000000,TRUE),
153 #endif
154 HOWTO(R_SPARC_10, 0,2,10,FALSE,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_10", FALSE,0,0x000003ff,TRUE),
155 HOWTO(R_SPARC_11, 0,2,11,FALSE,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_11", FALSE,0,0x000007ff,TRUE),
156 HOWTO(R_SPARC_64, 0,4,64,FALSE,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_64", FALSE,0,MINUS_ONE, TRUE),
157 HOWTO(R_SPARC_OLO10, 0,2,13,FALSE,0,complain_overflow_signed, sparc_elf_notsup_reloc, "R_SPARC_OLO10", FALSE,0,0x00001fff,TRUE),
158 HOWTO(R_SPARC_HH22, 42,2,22,FALSE,0,complain_overflow_unsigned,bfd_elf_generic_reloc, "R_SPARC_HH22", FALSE,0,0x003fffff,TRUE),
159 HOWTO(R_SPARC_HM10, 32,2,10,FALSE,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_HM10", FALSE,0,0x000003ff,TRUE),
160 HOWTO(R_SPARC_LM22, 10,2,22,FALSE,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_LM22", FALSE,0,0x003fffff,TRUE),
161 HOWTO(R_SPARC_PC_HH22, 42,2,22,TRUE, 0,complain_overflow_unsigned,bfd_elf_generic_reloc, "R_SPARC_PC_HH22", FALSE,0,0x003fffff,TRUE),
162 HOWTO(R_SPARC_PC_HM10, 32,2,10,TRUE, 0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_PC_HM10", FALSE,0,0x000003ff,TRUE),
163 HOWTO(R_SPARC_PC_LM22, 10,2,22,TRUE, 0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_PC_LM22", FALSE,0,0x003fffff,TRUE),
164 HOWTO(R_SPARC_WDISP16, 2,2,16,TRUE, 0,complain_overflow_signed, sparc_elf_wdisp16_reloc,"R_SPARC_WDISP16", FALSE,0,0x00000000,TRUE),
165 HOWTO(R_SPARC_WDISP19, 2,2,19,TRUE, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_WDISP19", FALSE,0,0x0007ffff,TRUE),
166 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),
167 HOWTO(R_SPARC_7, 0,2, 7,FALSE,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_7", FALSE,0,0x0000007f,TRUE),
168 HOWTO(R_SPARC_5, 0,2, 5,FALSE,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_5", FALSE,0,0x0000001f,TRUE),
169 HOWTO(R_SPARC_6, 0,2, 6,FALSE,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_6", FALSE,0,0x0000003f,TRUE),
170 HOWTO(R_SPARC_DISP64, 0,4,64,TRUE, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_DISP64", FALSE,0,MINUS_ONE, TRUE),
171 HOWTO(R_SPARC_PLT64, 0,4,64,FALSE,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_PLT64", FALSE,0,MINUS_ONE, TRUE),
172 HOWTO(R_SPARC_HIX22, 0,4, 0,FALSE,0,complain_overflow_bitfield,sparc_elf_hix22_reloc, "R_SPARC_HIX22", FALSE,0,MINUS_ONE, FALSE),
173 HOWTO(R_SPARC_LOX10, 0,4, 0,FALSE,0,complain_overflow_dont, sparc_elf_lox10_reloc, "R_SPARC_LOX10", FALSE,0,MINUS_ONE, FALSE),
174 HOWTO(R_SPARC_H44, 22,2,22,FALSE,0,complain_overflow_unsigned,bfd_elf_generic_reloc, "R_SPARC_H44", FALSE,0,0x003fffff,FALSE),
175 HOWTO(R_SPARC_M44, 12,2,10,FALSE,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_M44", FALSE,0,0x000003ff,FALSE),
176 HOWTO(R_SPARC_L44, 0,2,13,FALSE,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_L44", FALSE,0,0x00000fff,FALSE),
177 HOWTO(R_SPARC_REGISTER, 0,4, 0,FALSE,0,complain_overflow_bitfield,sparc_elf_notsup_reloc, "R_SPARC_REGISTER",FALSE,0,MINUS_ONE, FALSE),
178 HOWTO(R_SPARC_UA64, 0,4,64,FALSE,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_UA64", FALSE,0,MINUS_ONE, TRUE),
179 HOWTO(R_SPARC_UA16, 0,1,16,FALSE,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_UA16", FALSE,0,0x0000ffff,TRUE),
180 HOWTO(R_SPARC_TLS_GD_HI22,10,2,22,FALSE,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_TLS_GD_HI22",FALSE,0,0x003fffff,TRUE),
181 HOWTO(R_SPARC_TLS_GD_LO10,0,2,10,FALSE,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_TLS_GD_LO10",FALSE,0,0x000003ff,TRUE),
182 HOWTO(R_SPARC_TLS_GD_ADD,0,0, 0,FALSE,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_TLS_GD_ADD",FALSE,0,0x00000000,TRUE),
183 HOWTO(R_SPARC_TLS_GD_CALL,2,2,30,TRUE,0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_TLS_GD_CALL",FALSE,0,0x3fffffff,TRUE),
184 HOWTO(R_SPARC_TLS_LDM_HI22,10,2,22,FALSE,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_TLS_LDM_HI22",FALSE,0,0x003fffff,TRUE),
185 HOWTO(R_SPARC_TLS_LDM_LO10,0,2,10,FALSE,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_TLS_LDM_LO10",FALSE,0,0x000003ff,TRUE),
186 HOWTO(R_SPARC_TLS_LDM_ADD,0,0, 0,FALSE,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_TLS_LDM_ADD",FALSE,0,0x00000000,TRUE),
187 HOWTO(R_SPARC_TLS_LDM_CALL,2,2,30,TRUE,0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_TLS_LDM_CALL",FALSE,0,0x3fffffff,TRUE),
188 HOWTO(R_SPARC_TLS_LDO_HIX22,0,2,0,FALSE,0,complain_overflow_bitfield,sparc_elf_hix22_reloc,"R_SPARC_TLS_LDO_HIX22",FALSE,0,0x003fffff, FALSE),
189 HOWTO(R_SPARC_TLS_LDO_LOX10,0,2,0,FALSE,0,complain_overflow_dont, sparc_elf_lox10_reloc, "R_SPARC_TLS_LDO_LOX10",FALSE,0,0x000003ff, FALSE),
190 HOWTO(R_SPARC_TLS_LDO_ADD,0,0, 0,FALSE,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_TLS_LDO_ADD",FALSE,0,0x00000000,TRUE),
191 HOWTO(R_SPARC_TLS_IE_HI22,10,2,22,FALSE,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_TLS_IE_HI22",FALSE,0,0x003fffff,TRUE),
192 HOWTO(R_SPARC_TLS_IE_LO10,0,2,10,FALSE,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_TLS_IE_LO10",FALSE,0,0x000003ff,TRUE),
193 HOWTO(R_SPARC_TLS_IE_LD,0,0, 0,FALSE,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_TLS_IE_LD",FALSE,0,0x00000000,TRUE),
194 HOWTO(R_SPARC_TLS_IE_LDX,0,0, 0,FALSE,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_TLS_IE_LDX",FALSE,0,0x00000000,TRUE),
195 HOWTO(R_SPARC_TLS_IE_ADD,0,0, 0,FALSE,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_TLS_IE_ADD",FALSE,0,0x00000000,TRUE),
196 HOWTO(R_SPARC_TLS_LE_HIX22,0,2,0,FALSE,0,complain_overflow_bitfield,sparc_elf_hix22_reloc, "R_SPARC_TLS_LE_HIX22",FALSE,0,0x003fffff, FALSE),
197 HOWTO(R_SPARC_TLS_LE_LOX10,0,2,0,FALSE,0,complain_overflow_dont, sparc_elf_lox10_reloc, "R_SPARC_TLS_LE_LOX10",FALSE,0,0x000003ff, FALSE),
198 HOWTO(R_SPARC_TLS_DTPMOD32,0,0, 0,FALSE,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_TLS_DTPMOD32",FALSE,0,0x00000000,TRUE),
199 HOWTO(R_SPARC_TLS_DTPMOD64,0,0, 0,FALSE,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_TLS_DTPMOD64",FALSE,0,0x00000000,TRUE),
200 HOWTO(R_SPARC_TLS_DTPOFF32,0,2,32,FALSE,0,complain_overflow_bitfield,bfd_elf_generic_reloc,"R_SPARC_TLS_DTPOFF32",FALSE,0,0xffffffff,TRUE),
201 HOWTO(R_SPARC_TLS_DTPOFF64,0,4,64,FALSE,0,complain_overflow_bitfield,bfd_elf_generic_reloc,"R_SPARC_TLS_DTPOFF64",FALSE,0,MINUS_ONE,TRUE),
202 HOWTO(R_SPARC_TLS_TPOFF32,0,0, 0,FALSE,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_TLS_TPOFF32",FALSE,0,0x00000000,TRUE),
203 HOWTO(R_SPARC_TLS_TPOFF64,0,0, 0,FALSE,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_TLS_TPOFF64",FALSE,0,0x00000000,TRUE)
204 };
205
206 struct elf_reloc_map {
207 bfd_reloc_code_real_type bfd_reloc_val;
208 unsigned char elf_reloc_val;
209 };
210
211 static const struct elf_reloc_map sparc_reloc_map[] =
212 {
213 { BFD_RELOC_NONE, R_SPARC_NONE, },
214 { BFD_RELOC_16, R_SPARC_16, },
215 { BFD_RELOC_16_PCREL, R_SPARC_DISP16 },
216 { BFD_RELOC_8, R_SPARC_8 },
217 { BFD_RELOC_8_PCREL, R_SPARC_DISP8 },
218 { BFD_RELOC_CTOR, R_SPARC_64 },
219 { BFD_RELOC_32, R_SPARC_32 },
220 { BFD_RELOC_32_PCREL, R_SPARC_DISP32 },
221 { BFD_RELOC_HI22, R_SPARC_HI22 },
222 { BFD_RELOC_LO10, R_SPARC_LO10, },
223 { BFD_RELOC_32_PCREL_S2, R_SPARC_WDISP30 },
224 { BFD_RELOC_64_PCREL, R_SPARC_DISP64 },
225 { BFD_RELOC_SPARC22, R_SPARC_22 },
226 { BFD_RELOC_SPARC13, R_SPARC_13 },
227 { BFD_RELOC_SPARC_GOT10, R_SPARC_GOT10 },
228 { BFD_RELOC_SPARC_GOT13, R_SPARC_GOT13 },
229 { BFD_RELOC_SPARC_GOT22, R_SPARC_GOT22 },
230 { BFD_RELOC_SPARC_PC10, R_SPARC_PC10 },
231 { BFD_RELOC_SPARC_PC22, R_SPARC_PC22 },
232 { BFD_RELOC_SPARC_WPLT30, R_SPARC_WPLT30 },
233 { BFD_RELOC_SPARC_COPY, R_SPARC_COPY },
234 { BFD_RELOC_SPARC_GLOB_DAT, R_SPARC_GLOB_DAT },
235 { BFD_RELOC_SPARC_JMP_SLOT, R_SPARC_JMP_SLOT },
236 { BFD_RELOC_SPARC_RELATIVE, R_SPARC_RELATIVE },
237 { BFD_RELOC_SPARC_WDISP22, R_SPARC_WDISP22 },
238 { BFD_RELOC_SPARC_UA16, R_SPARC_UA16 },
239 { BFD_RELOC_SPARC_UA32, R_SPARC_UA32 },
240 { BFD_RELOC_SPARC_UA64, R_SPARC_UA64 },
241 { BFD_RELOC_SPARC_10, R_SPARC_10 },
242 { BFD_RELOC_SPARC_11, R_SPARC_11 },
243 { BFD_RELOC_SPARC_64, R_SPARC_64 },
244 { BFD_RELOC_SPARC_OLO10, R_SPARC_OLO10 },
245 { BFD_RELOC_SPARC_HH22, R_SPARC_HH22 },
246 { BFD_RELOC_SPARC_HM10, R_SPARC_HM10 },
247 { BFD_RELOC_SPARC_LM22, R_SPARC_LM22 },
248 { BFD_RELOC_SPARC_PC_HH22, R_SPARC_PC_HH22 },
249 { BFD_RELOC_SPARC_PC_HM10, R_SPARC_PC_HM10 },
250 { BFD_RELOC_SPARC_PC_LM22, R_SPARC_PC_LM22 },
251 { BFD_RELOC_SPARC_WDISP16, R_SPARC_WDISP16 },
252 { BFD_RELOC_SPARC_WDISP19, R_SPARC_WDISP19 },
253 { BFD_RELOC_SPARC_7, R_SPARC_7 },
254 { BFD_RELOC_SPARC_5, R_SPARC_5 },
255 { BFD_RELOC_SPARC_6, R_SPARC_6 },
256 { BFD_RELOC_SPARC_DISP64, R_SPARC_DISP64 },
257 { BFD_RELOC_SPARC_TLS_GD_HI22, R_SPARC_TLS_GD_HI22 },
258 { BFD_RELOC_SPARC_TLS_GD_LO10, R_SPARC_TLS_GD_LO10 },
259 { BFD_RELOC_SPARC_TLS_GD_ADD, R_SPARC_TLS_GD_ADD },
260 { BFD_RELOC_SPARC_TLS_GD_CALL, R_SPARC_TLS_GD_CALL },
261 { BFD_RELOC_SPARC_TLS_LDM_HI22, R_SPARC_TLS_LDM_HI22 },
262 { BFD_RELOC_SPARC_TLS_LDM_LO10, R_SPARC_TLS_LDM_LO10 },
263 { BFD_RELOC_SPARC_TLS_LDM_ADD, R_SPARC_TLS_LDM_ADD },
264 { BFD_RELOC_SPARC_TLS_LDM_CALL, R_SPARC_TLS_LDM_CALL },
265 { BFD_RELOC_SPARC_TLS_LDO_HIX22, R_SPARC_TLS_LDO_HIX22 },
266 { BFD_RELOC_SPARC_TLS_LDO_LOX10, R_SPARC_TLS_LDO_LOX10 },
267 { BFD_RELOC_SPARC_TLS_LDO_ADD, R_SPARC_TLS_LDO_ADD },
268 { BFD_RELOC_SPARC_TLS_IE_HI22, R_SPARC_TLS_IE_HI22 },
269 { BFD_RELOC_SPARC_TLS_IE_LO10, R_SPARC_TLS_IE_LO10 },
270 { BFD_RELOC_SPARC_TLS_IE_LD, R_SPARC_TLS_IE_LD },
271 { BFD_RELOC_SPARC_TLS_IE_LDX, R_SPARC_TLS_IE_LDX },
272 { BFD_RELOC_SPARC_TLS_IE_ADD, R_SPARC_TLS_IE_ADD },
273 { BFD_RELOC_SPARC_TLS_LE_HIX22, R_SPARC_TLS_LE_HIX22 },
274 { BFD_RELOC_SPARC_TLS_LE_LOX10, R_SPARC_TLS_LE_LOX10 },
275 { BFD_RELOC_SPARC_TLS_DTPMOD32, R_SPARC_TLS_DTPMOD32 },
276 { BFD_RELOC_SPARC_TLS_DTPMOD64, R_SPARC_TLS_DTPMOD64 },
277 { BFD_RELOC_SPARC_TLS_DTPOFF32, R_SPARC_TLS_DTPOFF32 },
278 { BFD_RELOC_SPARC_TLS_DTPOFF64, R_SPARC_TLS_DTPOFF64 },
279 { BFD_RELOC_SPARC_TLS_TPOFF32, R_SPARC_TLS_TPOFF32 },
280 { BFD_RELOC_SPARC_TLS_TPOFF64, R_SPARC_TLS_TPOFF64 },
281 #ifndef SPARC64_OLD_RELOCS
282 { BFD_RELOC_SPARC_PLT32, R_SPARC_PLT32 },
283 #endif
284 { BFD_RELOC_SPARC_PLT64, R_SPARC_PLT64 },
285 { BFD_RELOC_SPARC_HIX22, R_SPARC_HIX22 },
286 { BFD_RELOC_SPARC_LOX10, R_SPARC_LOX10 },
287 { BFD_RELOC_SPARC_H44, R_SPARC_H44 },
288 { BFD_RELOC_SPARC_M44, R_SPARC_M44 },
289 { BFD_RELOC_SPARC_L44, R_SPARC_L44 },
290 { BFD_RELOC_SPARC_REGISTER, R_SPARC_REGISTER }
291 };
292
293 static reloc_howto_type *
sparc64_elf_reloc_type_lookup(abfd,code)294 sparc64_elf_reloc_type_lookup (abfd, code)
295 bfd *abfd ATTRIBUTE_UNUSED;
296 bfd_reloc_code_real_type code;
297 {
298 unsigned int i;
299 for (i = 0; i < sizeof (sparc_reloc_map) / sizeof (struct elf_reloc_map); i++)
300 {
301 if (sparc_reloc_map[i].bfd_reloc_val == code)
302 return &sparc64_elf_howto_table[(int) sparc_reloc_map[i].elf_reloc_val];
303 }
304 return 0;
305 }
306
307 static void
sparc64_elf_info_to_howto(abfd,cache_ptr,dst)308 sparc64_elf_info_to_howto (abfd, cache_ptr, dst)
309 bfd *abfd ATTRIBUTE_UNUSED;
310 arelent *cache_ptr;
311 Elf_Internal_Rela *dst;
312 {
313 BFD_ASSERT (ELF64_R_TYPE_ID (dst->r_info) < (unsigned int) R_SPARC_max_std);
314 cache_ptr->howto = &sparc64_elf_howto_table[ELF64_R_TYPE_ID (dst->r_info)];
315 }
316
317 struct sparc64_elf_section_data
318 {
319 struct bfd_elf_section_data elf;
320 unsigned int do_relax, reloc_count;
321 };
322
323 #define sec_do_relax(sec) \
324 ((struct sparc64_elf_section_data *) elf_section_data (sec))->do_relax
325 #define canon_reloc_count(sec) \
326 ((struct sparc64_elf_section_data *) elf_section_data (sec))->reloc_count
327
328 /* Due to the way how we handle R_SPARC_OLO10, each entry in a SHT_RELA
329 section can represent up to two relocs, we must tell the user to allocate
330 more space. */
331
332 static long
sparc64_elf_get_reloc_upper_bound(abfd,sec)333 sparc64_elf_get_reloc_upper_bound (abfd, sec)
334 bfd *abfd ATTRIBUTE_UNUSED;
335 asection *sec;
336 {
337 return (sec->reloc_count * 2 + 1) * sizeof (arelent *);
338 }
339
340 static long
sparc64_elf_get_dynamic_reloc_upper_bound(abfd)341 sparc64_elf_get_dynamic_reloc_upper_bound (abfd)
342 bfd *abfd;
343 {
344 return _bfd_elf_get_dynamic_reloc_upper_bound (abfd) * 2;
345 }
346
347 /* Read relocations for ASECT from REL_HDR. There are RELOC_COUNT of
348 them. We cannot use generic elf routines for this, because R_SPARC_OLO10
349 has secondary addend in ELF64_R_TYPE_DATA. We handle it as two relocations
350 for the same location, R_SPARC_LO10 and R_SPARC_13. */
351
352 static bfd_boolean
sparc64_elf_slurp_one_reloc_table(abfd,asect,rel_hdr,symbols,dynamic)353 sparc64_elf_slurp_one_reloc_table (abfd, asect, rel_hdr, symbols, dynamic)
354 bfd *abfd;
355 asection *asect;
356 Elf_Internal_Shdr *rel_hdr;
357 asymbol **symbols;
358 bfd_boolean dynamic;
359 {
360 PTR allocated = NULL;
361 bfd_byte *native_relocs;
362 arelent *relent;
363 unsigned int i;
364 int entsize;
365 bfd_size_type count;
366 arelent *relents;
367
368 allocated = (PTR) bfd_malloc (rel_hdr->sh_size);
369 if (allocated == NULL)
370 goto error_return;
371
372 if (bfd_seek (abfd, rel_hdr->sh_offset, SEEK_SET) != 0
373 || bfd_bread (allocated, rel_hdr->sh_size, abfd) != rel_hdr->sh_size)
374 goto error_return;
375
376 native_relocs = (bfd_byte *) allocated;
377
378 relents = asect->relocation + canon_reloc_count (asect);
379
380 entsize = rel_hdr->sh_entsize;
381 BFD_ASSERT (entsize == sizeof (Elf64_External_Rela));
382
383 count = rel_hdr->sh_size / entsize;
384
385 for (i = 0, relent = relents; i < count;
386 i++, relent++, native_relocs += entsize)
387 {
388 Elf_Internal_Rela rela;
389
390 bfd_elf64_swap_reloca_in (abfd, native_relocs, &rela);
391
392 /* The address of an ELF reloc is section relative for an object
393 file, and absolute for an executable file or shared library.
394 The address of a normal BFD reloc is always section relative,
395 and the address of a dynamic reloc is absolute.. */
396 if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0 || dynamic)
397 relent->address = rela.r_offset;
398 else
399 relent->address = rela.r_offset - asect->vma;
400
401 if (ELF64_R_SYM (rela.r_info) == 0)
402 relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
403 else
404 {
405 asymbol **ps, *s;
406
407 ps = symbols + ELF64_R_SYM (rela.r_info) - 1;
408 s = *ps;
409
410 /* Canonicalize ELF section symbols. FIXME: Why? */
411 if ((s->flags & BSF_SECTION_SYM) == 0)
412 relent->sym_ptr_ptr = ps;
413 else
414 relent->sym_ptr_ptr = s->section->symbol_ptr_ptr;
415 }
416
417 relent->addend = rela.r_addend;
418
419 BFD_ASSERT (ELF64_R_TYPE_ID (rela.r_info) < (unsigned int) R_SPARC_max_std);
420 if (ELF64_R_TYPE_ID (rela.r_info) == R_SPARC_OLO10)
421 {
422 relent->howto = &sparc64_elf_howto_table[R_SPARC_LO10];
423 relent[1].address = relent->address;
424 relent++;
425 relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
426 relent->addend = ELF64_R_TYPE_DATA (rela.r_info);
427 relent->howto = &sparc64_elf_howto_table[R_SPARC_13];
428 }
429 else
430 relent->howto = &sparc64_elf_howto_table[ELF64_R_TYPE_ID (rela.r_info)];
431 }
432
433 canon_reloc_count (asect) += relent - relents;
434
435 if (allocated != NULL)
436 free (allocated);
437
438 return TRUE;
439
440 error_return:
441 if (allocated != NULL)
442 free (allocated);
443 return FALSE;
444 }
445
446 /* Read in and swap the external relocs. */
447
448 static bfd_boolean
sparc64_elf_slurp_reloc_table(abfd,asect,symbols,dynamic)449 sparc64_elf_slurp_reloc_table (abfd, asect, symbols, dynamic)
450 bfd *abfd;
451 asection *asect;
452 asymbol **symbols;
453 bfd_boolean dynamic;
454 {
455 struct bfd_elf_section_data * const d = elf_section_data (asect);
456 Elf_Internal_Shdr *rel_hdr;
457 Elf_Internal_Shdr *rel_hdr2;
458 bfd_size_type amt;
459
460 if (asect->relocation != NULL)
461 return TRUE;
462
463 if (! dynamic)
464 {
465 if ((asect->flags & SEC_RELOC) == 0
466 || asect->reloc_count == 0)
467 return TRUE;
468
469 rel_hdr = &d->rel_hdr;
470 rel_hdr2 = d->rel_hdr2;
471
472 BFD_ASSERT (asect->rel_filepos == rel_hdr->sh_offset
473 || (rel_hdr2 && asect->rel_filepos == rel_hdr2->sh_offset));
474 }
475 else
476 {
477 /* Note that ASECT->RELOC_COUNT tends not to be accurate in this
478 case because relocations against this section may use the
479 dynamic symbol table, and in that case bfd_section_from_shdr
480 in elf.c does not update the RELOC_COUNT. */
481 if (asect->_raw_size == 0)
482 return TRUE;
483
484 rel_hdr = &d->this_hdr;
485 asect->reloc_count = NUM_SHDR_ENTRIES (rel_hdr);
486 rel_hdr2 = NULL;
487 }
488
489 amt = asect->reloc_count;
490 amt *= 2 * sizeof (arelent);
491 asect->relocation = (arelent *) bfd_alloc (abfd, amt);
492 if (asect->relocation == NULL)
493 return FALSE;
494
495 /* The sparc64_elf_slurp_one_reloc_table routine increments
496 canon_reloc_count. */
497 canon_reloc_count (asect) = 0;
498
499 if (!sparc64_elf_slurp_one_reloc_table (abfd, asect, rel_hdr, symbols,
500 dynamic))
501 return FALSE;
502
503 if (rel_hdr2
504 && !sparc64_elf_slurp_one_reloc_table (abfd, asect, rel_hdr2, symbols,
505 dynamic))
506 return FALSE;
507
508 return TRUE;
509 }
510
511 /* Canonicalize the relocs. */
512
513 static long
sparc64_elf_canonicalize_reloc(abfd,section,relptr,symbols)514 sparc64_elf_canonicalize_reloc (abfd, section, relptr, symbols)
515 bfd *abfd;
516 sec_ptr section;
517 arelent **relptr;
518 asymbol **symbols;
519 {
520 arelent *tblptr;
521 unsigned int i;
522 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
523
524 if (! bed->s->slurp_reloc_table (abfd, section, symbols, FALSE))
525 return -1;
526
527 tblptr = section->relocation;
528 for (i = 0; i < canon_reloc_count (section); i++)
529 *relptr++ = tblptr++;
530
531 *relptr = NULL;
532
533 return canon_reloc_count (section);
534 }
535
536
537 /* Canonicalize the dynamic relocation entries. Note that we return
538 the dynamic relocations as a single block, although they are
539 actually associated with particular sections; the interface, which
540 was designed for SunOS style shared libraries, expects that there
541 is only one set of dynamic relocs. Any section that was actually
542 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses
543 the dynamic symbol table, is considered to be a dynamic reloc
544 section. */
545
546 static long
sparc64_elf_canonicalize_dynamic_reloc(abfd,storage,syms)547 sparc64_elf_canonicalize_dynamic_reloc (abfd, storage, syms)
548 bfd *abfd;
549 arelent **storage;
550 asymbol **syms;
551 {
552 asection *s;
553 long ret;
554
555 if (elf_dynsymtab (abfd) == 0)
556 {
557 bfd_set_error (bfd_error_invalid_operation);
558 return -1;
559 }
560
561 ret = 0;
562 for (s = abfd->sections; s != NULL; s = s->next)
563 {
564 if (elf_section_data (s)->this_hdr.sh_link == elf_dynsymtab (abfd)
565 && (elf_section_data (s)->this_hdr.sh_type == SHT_RELA))
566 {
567 arelent *p;
568 long count, i;
569
570 if (! sparc64_elf_slurp_reloc_table (abfd, s, syms, TRUE))
571 return -1;
572 count = canon_reloc_count (s);
573 p = s->relocation;
574 for (i = 0; i < count; i++)
575 *storage++ = p++;
576 ret += count;
577 }
578 }
579
580 *storage = NULL;
581
582 return ret;
583 }
584
585 /* Write out the relocs. */
586
587 static void
sparc64_elf_write_relocs(abfd,sec,data)588 sparc64_elf_write_relocs (abfd, sec, data)
589 bfd *abfd;
590 asection *sec;
591 PTR data;
592 {
593 bfd_boolean *failedp = (bfd_boolean *) data;
594 Elf_Internal_Shdr *rela_hdr;
595 Elf64_External_Rela *outbound_relocas, *src_rela;
596 unsigned int idx, count;
597 asymbol *last_sym = 0;
598 int last_sym_idx = 0;
599
600 /* If we have already failed, don't do anything. */
601 if (*failedp)
602 return;
603
604 if ((sec->flags & SEC_RELOC) == 0)
605 return;
606
607 /* The linker backend writes the relocs out itself, and sets the
608 reloc_count field to zero to inhibit writing them here. Also,
609 sometimes the SEC_RELOC flag gets set even when there aren't any
610 relocs. */
611 if (sec->reloc_count == 0)
612 return;
613
614 /* We can combine two relocs that refer to the same address
615 into R_SPARC_OLO10 if first one is R_SPARC_LO10 and the
616 latter is R_SPARC_13 with no associated symbol. */
617 count = 0;
618 for (idx = 0; idx < sec->reloc_count; idx++)
619 {
620 bfd_vma addr;
621
622 ++count;
623
624 addr = sec->orelocation[idx]->address;
625 if (sec->orelocation[idx]->howto->type == R_SPARC_LO10
626 && idx < sec->reloc_count - 1)
627 {
628 arelent *r = sec->orelocation[idx + 1];
629
630 if (r->howto->type == R_SPARC_13
631 && r->address == addr
632 && bfd_is_abs_section ((*r->sym_ptr_ptr)->section)
633 && (*r->sym_ptr_ptr)->value == 0)
634 ++idx;
635 }
636 }
637
638 rela_hdr = &elf_section_data (sec)->rel_hdr;
639
640 rela_hdr->sh_size = rela_hdr->sh_entsize * count;
641 rela_hdr->contents = (PTR) bfd_alloc (abfd, rela_hdr->sh_size);
642 if (rela_hdr->contents == NULL)
643 {
644 *failedp = TRUE;
645 return;
646 }
647
648 /* Figure out whether the relocations are RELA or REL relocations. */
649 if (rela_hdr->sh_type != SHT_RELA)
650 abort ();
651
652 /* orelocation has the data, reloc_count has the count... */
653 outbound_relocas = (Elf64_External_Rela *) rela_hdr->contents;
654 src_rela = outbound_relocas;
655
656 for (idx = 0; idx < sec->reloc_count; idx++)
657 {
658 Elf_Internal_Rela dst_rela;
659 arelent *ptr;
660 asymbol *sym;
661 int n;
662
663 ptr = sec->orelocation[idx];
664
665 /* The address of an ELF reloc is section relative for an object
666 file, and absolute for an executable file or shared library.
667 The address of a BFD reloc is always section relative. */
668 if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0)
669 dst_rela.r_offset = ptr->address;
670 else
671 dst_rela.r_offset = ptr->address + sec->vma;
672
673 sym = *ptr->sym_ptr_ptr;
674 if (sym == last_sym)
675 n = last_sym_idx;
676 else if (bfd_is_abs_section (sym->section) && sym->value == 0)
677 n = STN_UNDEF;
678 else
679 {
680 last_sym = sym;
681 n = _bfd_elf_symbol_from_bfd_symbol (abfd, &sym);
682 if (n < 0)
683 {
684 *failedp = TRUE;
685 return;
686 }
687 last_sym_idx = n;
688 }
689
690 if ((*ptr->sym_ptr_ptr)->the_bfd != NULL
691 && (*ptr->sym_ptr_ptr)->the_bfd->xvec != abfd->xvec
692 && ! _bfd_elf_validate_reloc (abfd, ptr))
693 {
694 *failedp = TRUE;
695 return;
696 }
697
698 if (ptr->howto->type == R_SPARC_LO10
699 && idx < sec->reloc_count - 1)
700 {
701 arelent *r = sec->orelocation[idx + 1];
702
703 if (r->howto->type == R_SPARC_13
704 && r->address == ptr->address
705 && bfd_is_abs_section ((*r->sym_ptr_ptr)->section)
706 && (*r->sym_ptr_ptr)->value == 0)
707 {
708 idx++;
709 dst_rela.r_info
710 = ELF64_R_INFO (n, ELF64_R_TYPE_INFO (r->addend,
711 R_SPARC_OLO10));
712 }
713 else
714 dst_rela.r_info = ELF64_R_INFO (n, R_SPARC_LO10);
715 }
716 else
717 dst_rela.r_info = ELF64_R_INFO (n, ptr->howto->type);
718
719 dst_rela.r_addend = ptr->addend;
720 bfd_elf64_swap_reloca_out (abfd, &dst_rela, (bfd_byte *) src_rela);
721 ++src_rela;
722 }
723 }
724
725 /* Sparc64 ELF linker hash table. */
726
727 struct sparc64_elf_app_reg
728 {
729 unsigned char bind;
730 unsigned short shndx;
731 bfd *abfd;
732 char *name;
733 };
734
735 struct sparc64_elf_link_hash_table
736 {
737 struct elf_link_hash_table root;
738
739 struct sparc64_elf_app_reg app_regs [4];
740 };
741
742 /* Get the Sparc64 ELF linker hash table from a link_info structure. */
743
744 #define sparc64_elf_hash_table(p) \
745 ((struct sparc64_elf_link_hash_table *) ((p)->hash))
746
747 /* Create a Sparc64 ELF linker hash table. */
748
749 static struct bfd_link_hash_table *
sparc64_elf_bfd_link_hash_table_create(abfd)750 sparc64_elf_bfd_link_hash_table_create (abfd)
751 bfd *abfd;
752 {
753 struct sparc64_elf_link_hash_table *ret;
754 bfd_size_type amt = sizeof (struct sparc64_elf_link_hash_table);
755
756 ret = (struct sparc64_elf_link_hash_table *) bfd_zmalloc (amt);
757 if (ret == (struct sparc64_elf_link_hash_table *) NULL)
758 return NULL;
759
760 if (! _bfd_elf_link_hash_table_init (&ret->root, abfd,
761 _bfd_elf_link_hash_newfunc))
762 {
763 free (ret);
764 return NULL;
765 }
766
767 return &ret->root.root;
768 }
769
770 /* Utility for performing the standard initial work of an instruction
771 relocation.
772 *PRELOCATION will contain the relocated item.
773 *PINSN will contain the instruction from the input stream.
774 If the result is `bfd_reloc_other' the caller can continue with
775 performing the relocation. Otherwise it must stop and return the
776 value to its caller. */
777
778 static bfd_reloc_status_type
init_insn_reloc(abfd,reloc_entry,symbol,data,input_section,output_bfd,prelocation,pinsn)779 init_insn_reloc (abfd,
780 reloc_entry,
781 symbol,
782 data,
783 input_section,
784 output_bfd,
785 prelocation,
786 pinsn)
787 bfd *abfd;
788 arelent *reloc_entry;
789 asymbol *symbol;
790 PTR data;
791 asection *input_section;
792 bfd *output_bfd;
793 bfd_vma *prelocation;
794 bfd_vma *pinsn;
795 {
796 bfd_vma relocation;
797 reloc_howto_type *howto = reloc_entry->howto;
798
799 if (output_bfd != (bfd *) NULL
800 && (symbol->flags & BSF_SECTION_SYM) == 0
801 && (! howto->partial_inplace
802 || reloc_entry->addend == 0))
803 {
804 reloc_entry->address += input_section->output_offset;
805 return bfd_reloc_ok;
806 }
807
808 /* This works because partial_inplace is FALSE. */
809 if (output_bfd != NULL)
810 return bfd_reloc_continue;
811
812 if (reloc_entry->address > input_section->_cooked_size)
813 return bfd_reloc_outofrange;
814
815 relocation = (symbol->value
816 + symbol->section->output_section->vma
817 + symbol->section->output_offset);
818 relocation += reloc_entry->addend;
819 if (howto->pc_relative)
820 {
821 relocation -= (input_section->output_section->vma
822 + input_section->output_offset);
823 relocation -= reloc_entry->address;
824 }
825
826 *prelocation = relocation;
827 *pinsn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
828 return bfd_reloc_other;
829 }
830
831 /* For unsupported relocs. */
832
833 static bfd_reloc_status_type
sparc_elf_notsup_reloc(abfd,reloc_entry,symbol,data,input_section,output_bfd,error_message)834 sparc_elf_notsup_reloc (abfd,
835 reloc_entry,
836 symbol,
837 data,
838 input_section,
839 output_bfd,
840 error_message)
841 bfd *abfd ATTRIBUTE_UNUSED;
842 arelent *reloc_entry ATTRIBUTE_UNUSED;
843 asymbol *symbol ATTRIBUTE_UNUSED;
844 PTR data ATTRIBUTE_UNUSED;
845 asection *input_section ATTRIBUTE_UNUSED;
846 bfd *output_bfd ATTRIBUTE_UNUSED;
847 char **error_message ATTRIBUTE_UNUSED;
848 {
849 return bfd_reloc_notsupported;
850 }
851
852 /* Handle the WDISP16 reloc. */
853
854 static bfd_reloc_status_type
sparc_elf_wdisp16_reloc(abfd,reloc_entry,symbol,data,input_section,output_bfd,error_message)855 sparc_elf_wdisp16_reloc (abfd, reloc_entry, symbol, data, input_section,
856 output_bfd, error_message)
857 bfd *abfd;
858 arelent *reloc_entry;
859 asymbol *symbol;
860 PTR data;
861 asection *input_section;
862 bfd *output_bfd;
863 char **error_message ATTRIBUTE_UNUSED;
864 {
865 bfd_vma relocation;
866 bfd_vma insn;
867 bfd_reloc_status_type status;
868
869 status = init_insn_reloc (abfd, reloc_entry, symbol, data,
870 input_section, output_bfd, &relocation, &insn);
871 if (status != bfd_reloc_other)
872 return status;
873
874 insn &= ~ (bfd_vma) 0x303fff;
875 insn |= (((relocation >> 2) & 0xc000) << 6) | ((relocation >> 2) & 0x3fff);
876 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
877
878 if ((bfd_signed_vma) relocation < - 0x40000
879 || (bfd_signed_vma) relocation > 0x3ffff)
880 return bfd_reloc_overflow;
881 else
882 return bfd_reloc_ok;
883 }
884
885 /* Handle the HIX22 reloc. */
886
887 static bfd_reloc_status_type
sparc_elf_hix22_reloc(abfd,reloc_entry,symbol,data,input_section,output_bfd,error_message)888 sparc_elf_hix22_reloc (abfd,
889 reloc_entry,
890 symbol,
891 data,
892 input_section,
893 output_bfd,
894 error_message)
895 bfd *abfd;
896 arelent *reloc_entry;
897 asymbol *symbol;
898 PTR data;
899 asection *input_section;
900 bfd *output_bfd;
901 char **error_message ATTRIBUTE_UNUSED;
902 {
903 bfd_vma relocation;
904 bfd_vma insn;
905 bfd_reloc_status_type status;
906
907 status = init_insn_reloc (abfd, reloc_entry, symbol, data,
908 input_section, output_bfd, &relocation, &insn);
909 if (status != bfd_reloc_other)
910 return status;
911
912 relocation ^= MINUS_ONE;
913 insn = (insn &~ (bfd_vma) 0x3fffff) | ((relocation >> 10) & 0x3fffff);
914 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
915
916 if ((relocation & ~ (bfd_vma) 0xffffffff) != 0)
917 return bfd_reloc_overflow;
918 else
919 return bfd_reloc_ok;
920 }
921
922 /* Handle the LOX10 reloc. */
923
924 static bfd_reloc_status_type
sparc_elf_lox10_reloc(abfd,reloc_entry,symbol,data,input_section,output_bfd,error_message)925 sparc_elf_lox10_reloc (abfd,
926 reloc_entry,
927 symbol,
928 data,
929 input_section,
930 output_bfd,
931 error_message)
932 bfd *abfd;
933 arelent *reloc_entry;
934 asymbol *symbol;
935 PTR data;
936 asection *input_section;
937 bfd *output_bfd;
938 char **error_message ATTRIBUTE_UNUSED;
939 {
940 bfd_vma relocation;
941 bfd_vma insn;
942 bfd_reloc_status_type status;
943
944 status = init_insn_reloc (abfd, reloc_entry, symbol, data,
945 input_section, output_bfd, &relocation, &insn);
946 if (status != bfd_reloc_other)
947 return status;
948
949 insn = (insn &~ (bfd_vma) 0x1fff) | 0x1c00 | (relocation & 0x3ff);
950 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
951
952 return bfd_reloc_ok;
953 }
954
955 /* PLT/GOT stuff */
956
957 /* Both the headers and the entries are icache aligned. */
958 #define PLT_ENTRY_SIZE 32
959 #define PLT_HEADER_SIZE (4 * PLT_ENTRY_SIZE)
960 #define LARGE_PLT_THRESHOLD 32768
961 #define GOT_RESERVED_ENTRIES 1
962
963 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/sparcv9/ld.so.1"
964
965 /* Fill in the .plt section. */
966
967 static void
sparc64_elf_build_plt(output_bfd,contents,nentries)968 sparc64_elf_build_plt (output_bfd, contents, nentries)
969 bfd *output_bfd;
970 unsigned char *contents;
971 int nentries;
972 {
973 const unsigned int nop = 0x01000000;
974 int i, j;
975
976 /* The first four entries are reserved, and are initially undefined.
977 We fill them with `illtrap 0' to force ld.so to do something. */
978
979 for (i = 0; i < PLT_HEADER_SIZE/4; ++i)
980 bfd_put_32 (output_bfd, (bfd_vma) 0, contents+i*4);
981
982 /* The first 32768 entries are close enough to plt1 to get there via
983 a straight branch. */
984
985 for (i = 4; i < LARGE_PLT_THRESHOLD && i < nentries; ++i)
986 {
987 unsigned char *entry = contents + i * PLT_ENTRY_SIZE;
988 unsigned int sethi, ba;
989
990 /* sethi (. - plt0), %g1 */
991 sethi = 0x03000000 | (i * PLT_ENTRY_SIZE);
992
993 /* ba,a,pt %xcc, plt1 */
994 ba = 0x30680000 | (((contents+PLT_ENTRY_SIZE) - (entry+4)) / 4 & 0x7ffff);
995
996 bfd_put_32 (output_bfd, (bfd_vma) sethi, entry);
997 bfd_put_32 (output_bfd, (bfd_vma) ba, entry + 4);
998 bfd_put_32 (output_bfd, (bfd_vma) nop, entry + 8);
999 bfd_put_32 (output_bfd, (bfd_vma) nop, entry + 12);
1000 bfd_put_32 (output_bfd, (bfd_vma) nop, entry + 16);
1001 bfd_put_32 (output_bfd, (bfd_vma) nop, entry + 20);
1002 bfd_put_32 (output_bfd, (bfd_vma) nop, entry + 24);
1003 bfd_put_32 (output_bfd, (bfd_vma) nop, entry + 28);
1004 }
1005
1006 /* Now the tricky bit. Entries 32768 and higher are grouped in blocks of
1007 160: 160 entries and 160 pointers. This is to separate code from data,
1008 which is much friendlier on the cache. */
1009
1010 for (; i < nentries; i += 160)
1011 {
1012 int block = (i + 160 <= nentries ? 160 : nentries - i);
1013 for (j = 0; j < block; ++j)
1014 {
1015 unsigned char *entry, *ptr;
1016 unsigned int ldx;
1017
1018 entry = contents + i*PLT_ENTRY_SIZE + j*4*6;
1019 ptr = contents + i*PLT_ENTRY_SIZE + block*4*6 + j*8;
1020
1021 /* ldx [%o7 + ptr - (entry+4)], %g1 */
1022 ldx = 0xc25be000 | ((ptr - (entry+4)) & 0x1fff);
1023
1024 /* mov %o7,%g5
1025 call .+8
1026 nop
1027 ldx [%o7+P],%g1
1028 jmpl %o7+%g1,%g1
1029 mov %g5,%o7 */
1030 bfd_put_32 (output_bfd, (bfd_vma) 0x8a10000f, entry);
1031 bfd_put_32 (output_bfd, (bfd_vma) 0x40000002, entry + 4);
1032 bfd_put_32 (output_bfd, (bfd_vma) nop, entry + 8);
1033 bfd_put_32 (output_bfd, (bfd_vma) ldx, entry + 12);
1034 bfd_put_32 (output_bfd, (bfd_vma) 0x83c3c001, entry + 16);
1035 bfd_put_32 (output_bfd, (bfd_vma) 0x9e100005, entry + 20);
1036
1037 bfd_put_64 (output_bfd, (bfd_vma) (contents - (entry + 4)), ptr);
1038 }
1039 }
1040 }
1041
1042 /* Return the offset of a particular plt entry within the .plt section. */
1043
1044 static bfd_vma
sparc64_elf_plt_entry_offset(index)1045 sparc64_elf_plt_entry_offset (index)
1046 bfd_vma index;
1047 {
1048 bfd_vma block, ofs;
1049
1050 if (index < LARGE_PLT_THRESHOLD)
1051 return index * PLT_ENTRY_SIZE;
1052
1053 /* See above for details. */
1054
1055 block = (index - LARGE_PLT_THRESHOLD) / 160;
1056 ofs = (index - LARGE_PLT_THRESHOLD) % 160;
1057
1058 return (LARGE_PLT_THRESHOLD + block * 160) * PLT_ENTRY_SIZE + ofs * 6 * 4;
1059 }
1060
1061 static bfd_vma
sparc64_elf_plt_ptr_offset(index,max)1062 sparc64_elf_plt_ptr_offset (index, max)
1063 bfd_vma index;
1064 bfd_vma max;
1065 {
1066 bfd_vma block, ofs, last;
1067
1068 BFD_ASSERT(index >= LARGE_PLT_THRESHOLD);
1069
1070 /* See above for details. */
1071
1072 block = (((index - LARGE_PLT_THRESHOLD) / 160) * 160) + LARGE_PLT_THRESHOLD;
1073 ofs = index - block;
1074 if (block + 160 > max)
1075 last = (max - LARGE_PLT_THRESHOLD) % 160;
1076 else
1077 last = 160;
1078
1079 return (block * PLT_ENTRY_SIZE
1080 + last * 6*4
1081 + ofs * 8);
1082 }
1083
1084 /* Look through the relocs for a section during the first phase, and
1085 allocate space in the global offset table or procedure linkage
1086 table. */
1087
1088 static bfd_boolean
sparc64_elf_check_relocs(abfd,info,sec,relocs)1089 sparc64_elf_check_relocs (abfd, info, sec, relocs)
1090 bfd *abfd;
1091 struct bfd_link_info *info;
1092 asection *sec;
1093 const Elf_Internal_Rela *relocs;
1094 {
1095 bfd *dynobj;
1096 Elf_Internal_Shdr *symtab_hdr;
1097 struct elf_link_hash_entry **sym_hashes;
1098 bfd_vma *local_got_offsets;
1099 const Elf_Internal_Rela *rel;
1100 const Elf_Internal_Rela *rel_end;
1101 asection *sgot;
1102 asection *srelgot;
1103 asection *sreloc;
1104
1105 if (info->relocatable || !(sec->flags & SEC_ALLOC))
1106 return TRUE;
1107
1108 dynobj = elf_hash_table (info)->dynobj;
1109 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1110 sym_hashes = elf_sym_hashes (abfd);
1111 local_got_offsets = elf_local_got_offsets (abfd);
1112
1113 sgot = NULL;
1114 srelgot = NULL;
1115 sreloc = NULL;
1116
1117 rel_end = relocs + NUM_SHDR_ENTRIES (& elf_section_data (sec)->rel_hdr);
1118 for (rel = relocs; rel < rel_end; rel++)
1119 {
1120 unsigned long r_symndx;
1121 struct elf_link_hash_entry *h;
1122
1123 r_symndx = ELF64_R_SYM (rel->r_info);
1124 if (r_symndx < symtab_hdr->sh_info)
1125 h = NULL;
1126 else
1127 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1128
1129 switch (ELF64_R_TYPE_ID (rel->r_info))
1130 {
1131 case R_SPARC_GOT10:
1132 case R_SPARC_GOT13:
1133 case R_SPARC_GOT22:
1134 /* This symbol requires a global offset table entry. */
1135
1136 if (dynobj == NULL)
1137 {
1138 /* Create the .got section. */
1139 elf_hash_table (info)->dynobj = dynobj = abfd;
1140 if (! _bfd_elf_create_got_section (dynobj, info))
1141 return FALSE;
1142 }
1143
1144 if (sgot == NULL)
1145 {
1146 sgot = bfd_get_section_by_name (dynobj, ".got");
1147 BFD_ASSERT (sgot != NULL);
1148 }
1149
1150 if (srelgot == NULL && (h != NULL || info->shared))
1151 {
1152 srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1153 if (srelgot == NULL)
1154 {
1155 srelgot = bfd_make_section (dynobj, ".rela.got");
1156 if (srelgot == NULL
1157 || ! bfd_set_section_flags (dynobj, srelgot,
1158 (SEC_ALLOC
1159 | SEC_LOAD
1160 | SEC_HAS_CONTENTS
1161 | SEC_IN_MEMORY
1162 | SEC_LINKER_CREATED
1163 | SEC_READONLY))
1164 || ! bfd_set_section_alignment (dynobj, srelgot, 3))
1165 return FALSE;
1166 }
1167 }
1168
1169 if (h != NULL)
1170 {
1171 if (h->got.offset != (bfd_vma) -1)
1172 {
1173 /* We have already allocated space in the .got. */
1174 break;
1175 }
1176 h->got.offset = sgot->_raw_size;
1177
1178 /* Make sure this symbol is output as a dynamic symbol. */
1179 if (h->dynindx == -1)
1180 {
1181 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1182 return FALSE;
1183 }
1184
1185 srelgot->_raw_size += sizeof (Elf64_External_Rela);
1186 }
1187 else
1188 {
1189 /* This is a global offset table entry for a local
1190 symbol. */
1191 if (local_got_offsets == NULL)
1192 {
1193 bfd_size_type size;
1194 register unsigned int i;
1195
1196 size = symtab_hdr->sh_info;
1197 size *= sizeof (bfd_vma);
1198 local_got_offsets = (bfd_vma *) bfd_alloc (abfd, size);
1199 if (local_got_offsets == NULL)
1200 return FALSE;
1201 elf_local_got_offsets (abfd) = local_got_offsets;
1202 for (i = 0; i < symtab_hdr->sh_info; i++)
1203 local_got_offsets[i] = (bfd_vma) -1;
1204 }
1205 if (local_got_offsets[r_symndx] != (bfd_vma) -1)
1206 {
1207 /* We have already allocated space in the .got. */
1208 break;
1209 }
1210 local_got_offsets[r_symndx] = sgot->_raw_size;
1211
1212 if (info->shared)
1213 {
1214 /* If we are generating a shared object, we need to
1215 output a R_SPARC_RELATIVE reloc so that the
1216 dynamic linker can adjust this GOT entry. */
1217 srelgot->_raw_size += sizeof (Elf64_External_Rela);
1218 }
1219 }
1220
1221 sgot->_raw_size += 8;
1222
1223 #if 0
1224 /* Doesn't work for 64-bit -fPIC, since sethi/or builds
1225 unsigned numbers. If we permit ourselves to modify
1226 code so we get sethi/xor, this could work.
1227 Question: do we consider conditionally re-enabling
1228 this for -fpic, once we know about object code models? */
1229 /* If the .got section is more than 0x1000 bytes, we add
1230 0x1000 to the value of _GLOBAL_OFFSET_TABLE_, so that 13
1231 bit relocations have a greater chance of working. */
1232 if (sgot->_raw_size >= 0x1000
1233 && elf_hash_table (info)->hgot->root.u.def.value == 0)
1234 elf_hash_table (info)->hgot->root.u.def.value = 0x1000;
1235 #endif
1236
1237 break;
1238
1239 case R_SPARC_WPLT30:
1240 case R_SPARC_PLT32:
1241 case R_SPARC_HIPLT22:
1242 case R_SPARC_LOPLT10:
1243 case R_SPARC_PCPLT32:
1244 case R_SPARC_PCPLT22:
1245 case R_SPARC_PCPLT10:
1246 case R_SPARC_PLT64:
1247 /* This symbol requires a procedure linkage table entry. We
1248 actually build the entry in adjust_dynamic_symbol,
1249 because this might be a case of linking PIC code without
1250 linking in any dynamic objects, in which case we don't
1251 need to generate a procedure linkage table after all. */
1252
1253 if (h == NULL)
1254 {
1255 /* It does not make sense to have a procedure linkage
1256 table entry for a local symbol. */
1257 bfd_set_error (bfd_error_bad_value);
1258 return FALSE;
1259 }
1260
1261 /* Make sure this symbol is output as a dynamic symbol. */
1262 if (h->dynindx == -1)
1263 {
1264 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1265 return FALSE;
1266 }
1267
1268 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
1269 if (ELF64_R_TYPE_ID (rel->r_info) != R_SPARC_PLT32
1270 && ELF64_R_TYPE_ID (rel->r_info) != R_SPARC_PLT64)
1271 break;
1272 /* Fall through. */
1273 case R_SPARC_PC10:
1274 case R_SPARC_PC22:
1275 case R_SPARC_PC_HH22:
1276 case R_SPARC_PC_HM10:
1277 case R_SPARC_PC_LM22:
1278 if (h != NULL
1279 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
1280 break;
1281 /* Fall through. */
1282 case R_SPARC_DISP8:
1283 case R_SPARC_DISP16:
1284 case R_SPARC_DISP32:
1285 case R_SPARC_DISP64:
1286 case R_SPARC_WDISP30:
1287 case R_SPARC_WDISP22:
1288 case R_SPARC_WDISP19:
1289 case R_SPARC_WDISP16:
1290 if (h == NULL)
1291 break;
1292 /* Fall through. */
1293 case R_SPARC_8:
1294 case R_SPARC_16:
1295 case R_SPARC_32:
1296 case R_SPARC_HI22:
1297 case R_SPARC_22:
1298 case R_SPARC_13:
1299 case R_SPARC_LO10:
1300 case R_SPARC_UA32:
1301 case R_SPARC_10:
1302 case R_SPARC_11:
1303 case R_SPARC_64:
1304 case R_SPARC_OLO10:
1305 case R_SPARC_HH22:
1306 case R_SPARC_HM10:
1307 case R_SPARC_LM22:
1308 case R_SPARC_7:
1309 case R_SPARC_5:
1310 case R_SPARC_6:
1311 case R_SPARC_HIX22:
1312 case R_SPARC_LOX10:
1313 case R_SPARC_H44:
1314 case R_SPARC_M44:
1315 case R_SPARC_L44:
1316 case R_SPARC_UA64:
1317 case R_SPARC_UA16:
1318 /* When creating a shared object, we must copy these relocs
1319 into the output file. We create a reloc section in
1320 dynobj and make room for the reloc.
1321
1322 But don't do this for debugging sections -- this shows up
1323 with DWARF2 -- first because they are not loaded, and
1324 second because DWARF sez the debug info is not to be
1325 biased by the load address. */
1326 if (info->shared && (sec->flags & SEC_ALLOC))
1327 {
1328 if (sreloc == NULL)
1329 {
1330 const char *name;
1331
1332 name = (bfd_elf_string_from_elf_section
1333 (abfd,
1334 elf_elfheader (abfd)->e_shstrndx,
1335 elf_section_data (sec)->rel_hdr.sh_name));
1336 if (name == NULL)
1337 return FALSE;
1338
1339 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
1340 && strcmp (bfd_get_section_name (abfd, sec),
1341 name + 5) == 0);
1342
1343 sreloc = bfd_get_section_by_name (dynobj, name);
1344 if (sreloc == NULL)
1345 {
1346 flagword flags;
1347
1348 sreloc = bfd_make_section (dynobj, name);
1349 flags = (SEC_HAS_CONTENTS | SEC_READONLY
1350 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
1351 if ((sec->flags & SEC_ALLOC) != 0)
1352 flags |= SEC_ALLOC | SEC_LOAD;
1353 if (sreloc == NULL
1354 || ! bfd_set_section_flags (dynobj, sreloc, flags)
1355 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
1356 return FALSE;
1357 }
1358 if (sec->flags & SEC_READONLY)
1359 info->flags |= DF_TEXTREL;
1360 }
1361
1362 sreloc->_raw_size += sizeof (Elf64_External_Rela);
1363 }
1364 break;
1365
1366 case R_SPARC_REGISTER:
1367 /* Nothing to do. */
1368 break;
1369
1370 default:
1371 (*_bfd_error_handler) (_("%s: check_relocs: unhandled reloc type %d"),
1372 bfd_archive_filename (abfd),
1373 ELF64_R_TYPE_ID (rel->r_info));
1374 return FALSE;
1375 }
1376 }
1377
1378 return TRUE;
1379 }
1380
1381 /* Hook called by the linker routine which adds symbols from an object
1382 file. We use it for STT_REGISTER symbols. */
1383
1384 static bfd_boolean
sparc64_elf_add_symbol_hook(abfd,info,sym,namep,flagsp,secp,valp)1385 sparc64_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp)
1386 bfd *abfd;
1387 struct bfd_link_info *info;
1388 Elf_Internal_Sym *sym;
1389 const char **namep;
1390 flagword *flagsp ATTRIBUTE_UNUSED;
1391 asection **secp ATTRIBUTE_UNUSED;
1392 bfd_vma *valp ATTRIBUTE_UNUSED;
1393 {
1394 static const char *const stt_types[] = { "NOTYPE", "OBJECT", "FUNCTION" };
1395
1396 if (ELF_ST_TYPE (sym->st_info) == STT_REGISTER)
1397 {
1398 int reg;
1399 struct sparc64_elf_app_reg *p;
1400
1401 reg = (int)sym->st_value;
1402 switch (reg & ~1)
1403 {
1404 case 2: reg -= 2; break;
1405 case 6: reg -= 4; break;
1406 default:
1407 (*_bfd_error_handler)
1408 (_("%s: Only registers %%g[2367] can be declared using STT_REGISTER"),
1409 bfd_archive_filename (abfd));
1410 return FALSE;
1411 }
1412
1413 if (info->hash->creator != abfd->xvec
1414 || (abfd->flags & DYNAMIC) != 0)
1415 {
1416 /* STT_REGISTER only works when linking an elf64_sparc object.
1417 If STT_REGISTER comes from a dynamic object, don't put it into
1418 the output bfd. The dynamic linker will recheck it. */
1419 *namep = NULL;
1420 return TRUE;
1421 }
1422
1423 p = sparc64_elf_hash_table(info)->app_regs + reg;
1424
1425 if (p->name != NULL && strcmp (p->name, *namep))
1426 {
1427 (*_bfd_error_handler)
1428 (_("Register %%g%d used incompatibly: %s in %s, previously %s in %s"),
1429 (int) sym->st_value,
1430 **namep ? *namep : "#scratch", bfd_archive_filename (abfd),
1431 *p->name ? p->name : "#scratch", bfd_archive_filename (p->abfd));
1432 return FALSE;
1433 }
1434
1435 if (p->name == NULL)
1436 {
1437 if (**namep)
1438 {
1439 struct elf_link_hash_entry *h;
1440
1441 h = (struct elf_link_hash_entry *)
1442 bfd_link_hash_lookup (info->hash, *namep, FALSE, FALSE, FALSE);
1443
1444 if (h != NULL)
1445 {
1446 unsigned char type = h->type;
1447
1448 if (type > STT_FUNC)
1449 type = 0;
1450 (*_bfd_error_handler)
1451 (_("Symbol `%s' has differing types: REGISTER in %s, previously %s in %s"),
1452 *namep, bfd_archive_filename (abfd),
1453 stt_types[type], bfd_archive_filename (p->abfd));
1454 return FALSE;
1455 }
1456
1457 p->name = bfd_hash_allocate (&info->hash->table,
1458 strlen (*namep) + 1);
1459 if (!p->name)
1460 return FALSE;
1461
1462 strcpy (p->name, *namep);
1463 }
1464 else
1465 p->name = "";
1466 p->bind = ELF_ST_BIND (sym->st_info);
1467 p->abfd = abfd;
1468 p->shndx = sym->st_shndx;
1469 }
1470 else
1471 {
1472 if (p->bind == STB_WEAK
1473 && ELF_ST_BIND (sym->st_info) == STB_GLOBAL)
1474 {
1475 p->bind = STB_GLOBAL;
1476 p->abfd = abfd;
1477 }
1478 }
1479 *namep = NULL;
1480 return TRUE;
1481 }
1482 else if (*namep && **namep
1483 && info->hash->creator == abfd->xvec)
1484 {
1485 int i;
1486 struct sparc64_elf_app_reg *p;
1487
1488 p = sparc64_elf_hash_table(info)->app_regs;
1489 for (i = 0; i < 4; i++, p++)
1490 if (p->name != NULL && ! strcmp (p->name, *namep))
1491 {
1492 unsigned char type = ELF_ST_TYPE (sym->st_info);
1493
1494 if (type > STT_FUNC)
1495 type = 0;
1496 (*_bfd_error_handler)
1497 (_("Symbol `%s' has differing types: %s in %s, previously REGISTER in %s"),
1498 *namep, stt_types[type], bfd_archive_filename (abfd),
1499 bfd_archive_filename (p->abfd));
1500 return FALSE;
1501 }
1502 }
1503 return TRUE;
1504 }
1505
1506 /* This function takes care of emitting STT_REGISTER symbols
1507 which we cannot easily keep in the symbol hash table. */
1508
1509 static bfd_boolean
sparc64_elf_output_arch_syms(output_bfd,info,finfo,func)1510 sparc64_elf_output_arch_syms (output_bfd, info, finfo, func)
1511 bfd *output_bfd ATTRIBUTE_UNUSED;
1512 struct bfd_link_info *info;
1513 PTR finfo;
1514 bfd_boolean (*func)
1515 PARAMS ((PTR, const char *, Elf_Internal_Sym *, asection *,
1516 struct elf_link_hash_entry *));
1517 {
1518 int reg;
1519 struct sparc64_elf_app_reg *app_regs =
1520 sparc64_elf_hash_table(info)->app_regs;
1521 Elf_Internal_Sym sym;
1522
1523 /* We arranged in size_dynamic_sections to put the STT_REGISTER entries
1524 at the end of the dynlocal list, so they came at the end of the local
1525 symbols in the symtab. Except that they aren't STB_LOCAL, so we need
1526 to back up symtab->sh_info. */
1527 if (elf_hash_table (info)->dynlocal)
1528 {
1529 bfd * dynobj = elf_hash_table (info)->dynobj;
1530 asection *dynsymsec = bfd_get_section_by_name (dynobj, ".dynsym");
1531 struct elf_link_local_dynamic_entry *e;
1532
1533 for (e = elf_hash_table (info)->dynlocal; e ; e = e->next)
1534 if (e->input_indx == -1)
1535 break;
1536 if (e)
1537 {
1538 elf_section_data (dynsymsec->output_section)->this_hdr.sh_info
1539 = e->dynindx;
1540 }
1541 }
1542
1543 if (info->strip == strip_all)
1544 return TRUE;
1545
1546 for (reg = 0; reg < 4; reg++)
1547 if (app_regs [reg].name != NULL)
1548 {
1549 if (info->strip == strip_some
1550 && bfd_hash_lookup (info->keep_hash,
1551 app_regs [reg].name,
1552 FALSE, FALSE) == NULL)
1553 continue;
1554
1555 sym.st_value = reg < 2 ? reg + 2 : reg + 4;
1556 sym.st_size = 0;
1557 sym.st_other = 0;
1558 sym.st_info = ELF_ST_INFO (app_regs [reg].bind, STT_REGISTER);
1559 sym.st_shndx = app_regs [reg].shndx;
1560 if (! (*func) (finfo, app_regs [reg].name, &sym,
1561 sym.st_shndx == SHN_ABS
1562 ? bfd_abs_section_ptr : bfd_und_section_ptr,
1563 NULL))
1564 return FALSE;
1565 }
1566
1567 return TRUE;
1568 }
1569
1570 static int
sparc64_elf_get_symbol_type(elf_sym,type)1571 sparc64_elf_get_symbol_type (elf_sym, type)
1572 Elf_Internal_Sym * elf_sym;
1573 int type;
1574 {
1575 if (ELF_ST_TYPE (elf_sym->st_info) == STT_REGISTER)
1576 return STT_REGISTER;
1577 else
1578 return type;
1579 }
1580
1581 /* A STB_GLOBAL,STT_REGISTER symbol should be BSF_GLOBAL
1582 even in SHN_UNDEF section. */
1583
1584 static void
sparc64_elf_symbol_processing(abfd,asym)1585 sparc64_elf_symbol_processing (abfd, asym)
1586 bfd *abfd ATTRIBUTE_UNUSED;
1587 asymbol *asym;
1588 {
1589 elf_symbol_type *elfsym;
1590
1591 elfsym = (elf_symbol_type *) asym;
1592 if (elfsym->internal_elf_sym.st_info
1593 == ELF_ST_INFO (STB_GLOBAL, STT_REGISTER))
1594 {
1595 asym->flags |= BSF_GLOBAL;
1596 }
1597 }
1598
1599 /* Adjust a symbol defined by a dynamic object and referenced by a
1600 regular object. The current definition is in some section of the
1601 dynamic object, but we're not including those sections. We have to
1602 change the definition to something the rest of the link can
1603 understand. */
1604
1605 static bfd_boolean
sparc64_elf_adjust_dynamic_symbol(info,h)1606 sparc64_elf_adjust_dynamic_symbol (info, h)
1607 struct bfd_link_info *info;
1608 struct elf_link_hash_entry *h;
1609 {
1610 bfd *dynobj;
1611 asection *s;
1612 unsigned int power_of_two;
1613
1614 dynobj = elf_hash_table (info)->dynobj;
1615
1616 /* Make sure we know what is going on here. */
1617 BFD_ASSERT (dynobj != NULL
1618 && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT)
1619 || h->weakdef != NULL
1620 || ((h->elf_link_hash_flags
1621 & ELF_LINK_HASH_DEF_DYNAMIC) != 0
1622 && (h->elf_link_hash_flags
1623 & ELF_LINK_HASH_REF_REGULAR) != 0
1624 && (h->elf_link_hash_flags
1625 & ELF_LINK_HASH_DEF_REGULAR) == 0)));
1626
1627 /* If this is a function, put it in the procedure linkage table. We
1628 will fill in the contents of the procedure linkage table later
1629 (although we could actually do it here). The STT_NOTYPE
1630 condition is a hack specifically for the Oracle libraries
1631 delivered for Solaris; for some inexplicable reason, they define
1632 some of their functions as STT_NOTYPE when they really should be
1633 STT_FUNC. */
1634 if (h->type == STT_FUNC
1635 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0
1636 || (h->type == STT_NOTYPE
1637 && (h->root.type == bfd_link_hash_defined
1638 || h->root.type == bfd_link_hash_defweak)
1639 && (h->root.u.def.section->flags & SEC_CODE) != 0))
1640 {
1641 if (! elf_hash_table (info)->dynamic_sections_created)
1642 {
1643 /* This case can occur if we saw a WPLT30 reloc in an input
1644 file, but none of the input files were dynamic objects.
1645 In such a case, we don't actually need to build a
1646 procedure linkage table, and we can just do a WDISP30
1647 reloc instead. */
1648 BFD_ASSERT ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0);
1649 return TRUE;
1650 }
1651
1652 s = bfd_get_section_by_name (dynobj, ".plt");
1653 BFD_ASSERT (s != NULL);
1654
1655 /* The first four bit in .plt is reserved. */
1656 if (s->_raw_size == 0)
1657 s->_raw_size = PLT_HEADER_SIZE;
1658
1659 /* To simplify matters later, just store the plt index here. */
1660 h->plt.offset = s->_raw_size / PLT_ENTRY_SIZE;
1661
1662 /* If this symbol is not defined in a regular file, and we are
1663 not generating a shared library, then set the symbol to this
1664 location in the .plt. This is required to make function
1665 pointers compare as equal between the normal executable and
1666 the shared library. */
1667 if (! info->shared
1668 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
1669 {
1670 h->root.u.def.section = s;
1671 h->root.u.def.value = sparc64_elf_plt_entry_offset (h->plt.offset);
1672 }
1673
1674 /* Make room for this entry. */
1675 s->_raw_size += PLT_ENTRY_SIZE;
1676
1677 /* We also need to make an entry in the .rela.plt section. */
1678
1679 s = bfd_get_section_by_name (dynobj, ".rela.plt");
1680 BFD_ASSERT (s != NULL);
1681
1682 s->_raw_size += sizeof (Elf64_External_Rela);
1683
1684 /* The procedure linkage table size is bounded by the magnitude
1685 of the offset we can describe in the entry. */
1686 if (s->_raw_size >= (bfd_vma)1 << 32)
1687 {
1688 bfd_set_error (bfd_error_bad_value);
1689 return FALSE;
1690 }
1691
1692 return TRUE;
1693 }
1694
1695 /* If this is a weak symbol, and there is a real definition, the
1696 processor independent code will have arranged for us to see the
1697 real definition first, and we can just use the same value. */
1698 if (h->weakdef != NULL)
1699 {
1700 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
1701 || h->weakdef->root.type == bfd_link_hash_defweak);
1702 h->root.u.def.section = h->weakdef->root.u.def.section;
1703 h->root.u.def.value = h->weakdef->root.u.def.value;
1704 return TRUE;
1705 }
1706
1707 /* This is a reference to a symbol defined by a dynamic object which
1708 is not a function. */
1709
1710 /* If we are creating a shared library, we must presume that the
1711 only references to the symbol are via the global offset table.
1712 For such cases we need not do anything here; the relocations will
1713 be handled correctly by relocate_section. */
1714 if (info->shared)
1715 return TRUE;
1716
1717 /* We must allocate the symbol in our .dynbss section, which will
1718 become part of the .bss section of the executable. There will be
1719 an entry for this symbol in the .dynsym section. The dynamic
1720 object will contain position independent code, so all references
1721 from the dynamic object to this symbol will go through the global
1722 offset table. The dynamic linker will use the .dynsym entry to
1723 determine the address it must put in the global offset table, so
1724 both the dynamic object and the regular object will refer to the
1725 same memory location for the variable. */
1726
1727 s = bfd_get_section_by_name (dynobj, ".dynbss");
1728 BFD_ASSERT (s != NULL);
1729
1730 /* We must generate a R_SPARC_COPY reloc to tell the dynamic linker
1731 to copy the initial value out of the dynamic object and into the
1732 runtime process image. We need to remember the offset into the
1733 .rel.bss section we are going to use. */
1734 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1735 {
1736 asection *srel;
1737
1738 srel = bfd_get_section_by_name (dynobj, ".rela.bss");
1739 BFD_ASSERT (srel != NULL);
1740 srel->_raw_size += sizeof (Elf64_External_Rela);
1741 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
1742 }
1743
1744 /* We need to figure out the alignment required for this symbol. I
1745 have no idea how ELF linkers handle this. 16-bytes is the size
1746 of the largest type that requires hard alignment -- long double. */
1747 power_of_two = bfd_log2 (h->size);
1748 if (power_of_two > 4)
1749 power_of_two = 4;
1750
1751 /* Apply the required alignment. */
1752 s->_raw_size = BFD_ALIGN (s->_raw_size,
1753 (bfd_size_type) (1 << power_of_two));
1754 if (power_of_two > bfd_get_section_alignment (dynobj, s))
1755 {
1756 if (! bfd_set_section_alignment (dynobj, s, power_of_two))
1757 return FALSE;
1758 }
1759
1760 /* Define the symbol as being at this point in the section. */
1761 h->root.u.def.section = s;
1762 h->root.u.def.value = s->_raw_size;
1763
1764 /* Increment the section size to make room for the symbol. */
1765 s->_raw_size += h->size;
1766
1767 return TRUE;
1768 }
1769
1770 /* Set the sizes of the dynamic sections. */
1771
1772 static bfd_boolean
sparc64_elf_size_dynamic_sections(output_bfd,info)1773 sparc64_elf_size_dynamic_sections (output_bfd, info)
1774 bfd *output_bfd;
1775 struct bfd_link_info *info;
1776 {
1777 bfd *dynobj;
1778 asection *s;
1779 bfd_boolean relplt;
1780
1781 dynobj = elf_hash_table (info)->dynobj;
1782 BFD_ASSERT (dynobj != NULL);
1783
1784 if (elf_hash_table (info)->dynamic_sections_created)
1785 {
1786 /* Set the contents of the .interp section to the interpreter. */
1787 if (info->executable)
1788 {
1789 s = bfd_get_section_by_name (dynobj, ".interp");
1790 BFD_ASSERT (s != NULL);
1791 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
1792 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1793 }
1794 }
1795 else
1796 {
1797 /* We may have created entries in the .rela.got section.
1798 However, if we are not creating the dynamic sections, we will
1799 not actually use these entries. Reset the size of .rela.got,
1800 which will cause it to get stripped from the output file
1801 below. */
1802 s = bfd_get_section_by_name (dynobj, ".rela.got");
1803 if (s != NULL)
1804 s->_raw_size = 0;
1805 }
1806
1807 /* The check_relocs and adjust_dynamic_symbol entry points have
1808 determined the sizes of the various dynamic sections. Allocate
1809 memory for them. */
1810 relplt = FALSE;
1811 for (s = dynobj->sections; s != NULL; s = s->next)
1812 {
1813 const char *name;
1814 bfd_boolean strip;
1815
1816 if ((s->flags & SEC_LINKER_CREATED) == 0)
1817 continue;
1818
1819 /* It's OK to base decisions on the section name, because none
1820 of the dynobj section names depend upon the input files. */
1821 name = bfd_get_section_name (dynobj, s);
1822
1823 strip = FALSE;
1824
1825 if (strncmp (name, ".rela", 5) == 0)
1826 {
1827 if (s->_raw_size == 0)
1828 {
1829 /* If we don't need this section, strip it from the
1830 output file. This is to handle .rela.bss and
1831 .rel.plt. We must create it in
1832 create_dynamic_sections, because it must be created
1833 before the linker maps input sections to output
1834 sections. The linker does that before
1835 adjust_dynamic_symbol is called, and it is that
1836 function which decides whether anything needs to go
1837 into these sections. */
1838 strip = TRUE;
1839 }
1840 else
1841 {
1842 if (strcmp (name, ".rela.plt") == 0)
1843 relplt = TRUE;
1844
1845 /* We use the reloc_count field as a counter if we need
1846 to copy relocs into the output file. */
1847 s->reloc_count = 0;
1848 }
1849 }
1850 else if (strcmp (name, ".plt") != 0
1851 && strncmp (name, ".got", 4) != 0)
1852 {
1853 /* It's not one of our sections, so don't allocate space. */
1854 continue;
1855 }
1856
1857 if (strip)
1858 {
1859 _bfd_strip_section_from_output (info, s);
1860 continue;
1861 }
1862
1863 /* Allocate memory for the section contents. Zero the memory
1864 for the benefit of .rela.plt, which has 4 unused entries
1865 at the beginning, and we don't want garbage. */
1866 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size);
1867 if (s->contents == NULL && s->_raw_size != 0)
1868 return FALSE;
1869 }
1870
1871 if (elf_hash_table (info)->dynamic_sections_created)
1872 {
1873 /* Add some entries to the .dynamic section. We fill in the
1874 values later, in sparc64_elf_finish_dynamic_sections, but we
1875 must add the entries now so that we get the correct size for
1876 the .dynamic section. The DT_DEBUG entry is filled in by the
1877 dynamic linker and used by the debugger. */
1878 #define add_dynamic_entry(TAG, VAL) \
1879 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
1880
1881 int reg;
1882 struct sparc64_elf_app_reg * app_regs;
1883 struct elf_strtab_hash *dynstr;
1884 struct elf_link_hash_table *eht = elf_hash_table (info);
1885
1886 if (info->executable)
1887 {
1888 if (!add_dynamic_entry (DT_DEBUG, 0))
1889 return FALSE;
1890 }
1891
1892 if (relplt)
1893 {
1894 if (!add_dynamic_entry (DT_PLTGOT, 0)
1895 || !add_dynamic_entry (DT_PLTRELSZ, 0)
1896 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
1897 || !add_dynamic_entry (DT_JMPREL, 0))
1898 return FALSE;
1899 }
1900
1901 if (!add_dynamic_entry (DT_RELA, 0)
1902 || !add_dynamic_entry (DT_RELASZ, 0)
1903 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
1904 return FALSE;
1905
1906 if (info->flags & DF_TEXTREL)
1907 {
1908 if (!add_dynamic_entry (DT_TEXTREL, 0))
1909 return FALSE;
1910 }
1911
1912 /* Add dynamic STT_REGISTER symbols and corresponding DT_SPARC_REGISTER
1913 entries if needed. */
1914 app_regs = sparc64_elf_hash_table (info)->app_regs;
1915 dynstr = eht->dynstr;
1916
1917 for (reg = 0; reg < 4; reg++)
1918 if (app_regs [reg].name != NULL)
1919 {
1920 struct elf_link_local_dynamic_entry *entry, *e;
1921
1922 if (!add_dynamic_entry (DT_SPARC_REGISTER, 0))
1923 return FALSE;
1924
1925 entry = (struct elf_link_local_dynamic_entry *)
1926 bfd_hash_allocate (&info->hash->table, sizeof (*entry));
1927 if (entry == NULL)
1928 return FALSE;
1929
1930 /* We cheat here a little bit: the symbol will not be local, so we
1931 put it at the end of the dynlocal linked list. We will fix it
1932 later on, as we have to fix other fields anyway. */
1933 entry->isym.st_value = reg < 2 ? reg + 2 : reg + 4;
1934 entry->isym.st_size = 0;
1935 if (*app_regs [reg].name != '\0')
1936 entry->isym.st_name
1937 = _bfd_elf_strtab_add (dynstr, app_regs[reg].name, FALSE);
1938 else
1939 entry->isym.st_name = 0;
1940 entry->isym.st_other = 0;
1941 entry->isym.st_info = ELF_ST_INFO (app_regs [reg].bind,
1942 STT_REGISTER);
1943 entry->isym.st_shndx = app_regs [reg].shndx;
1944 entry->next = NULL;
1945 entry->input_bfd = output_bfd;
1946 entry->input_indx = -1;
1947
1948 if (eht->dynlocal == NULL)
1949 eht->dynlocal = entry;
1950 else
1951 {
1952 for (e = eht->dynlocal; e->next; e = e->next)
1953 ;
1954 e->next = entry;
1955 }
1956 eht->dynsymcount++;
1957 }
1958 }
1959 #undef add_dynamic_entry
1960
1961 return TRUE;
1962 }
1963
1964 static bfd_boolean
sparc64_elf_new_section_hook(abfd,sec)1965 sparc64_elf_new_section_hook (abfd, sec)
1966 bfd *abfd;
1967 asection *sec;
1968 {
1969 struct sparc64_elf_section_data *sdata;
1970 bfd_size_type amt = sizeof (*sdata);
1971
1972 sdata = (struct sparc64_elf_section_data *) bfd_zalloc (abfd, amt);
1973 if (sdata == NULL)
1974 return FALSE;
1975 sec->used_by_bfd = (PTR) sdata;
1976
1977 return _bfd_elf_new_section_hook (abfd, sec);
1978 }
1979
1980 static bfd_boolean
sparc64_elf_relax_section(abfd,section,link_info,again)1981 sparc64_elf_relax_section (abfd, section, link_info, again)
1982 bfd *abfd ATTRIBUTE_UNUSED;
1983 asection *section ATTRIBUTE_UNUSED;
1984 struct bfd_link_info *link_info ATTRIBUTE_UNUSED;
1985 bfd_boolean *again;
1986 {
1987 *again = FALSE;
1988 sec_do_relax (section) = 1;
1989 return TRUE;
1990 }
1991
1992 /* Relocate a SPARC64 ELF section. */
1993
1994 static bfd_boolean
sparc64_elf_relocate_section(output_bfd,info,input_bfd,input_section,contents,relocs,local_syms,local_sections)1995 sparc64_elf_relocate_section (output_bfd, info, input_bfd, input_section,
1996 contents, relocs, local_syms, local_sections)
1997 bfd *output_bfd;
1998 struct bfd_link_info *info;
1999 bfd *input_bfd;
2000 asection *input_section;
2001 bfd_byte *contents;
2002 Elf_Internal_Rela *relocs;
2003 Elf_Internal_Sym *local_syms;
2004 asection **local_sections;
2005 {
2006 bfd *dynobj;
2007 Elf_Internal_Shdr *symtab_hdr;
2008 struct elf_link_hash_entry **sym_hashes;
2009 bfd_vma *local_got_offsets;
2010 bfd_vma got_base;
2011 asection *sgot;
2012 asection *splt;
2013 asection *sreloc;
2014 Elf_Internal_Rela *rel;
2015 Elf_Internal_Rela *relend;
2016
2017 if (info->relocatable)
2018 return TRUE;
2019
2020 dynobj = elf_hash_table (info)->dynobj;
2021 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2022 sym_hashes = elf_sym_hashes (input_bfd);
2023 local_got_offsets = elf_local_got_offsets (input_bfd);
2024
2025 if (elf_hash_table(info)->hgot == NULL)
2026 got_base = 0;
2027 else
2028 got_base = elf_hash_table (info)->hgot->root.u.def.value;
2029
2030 sgot = splt = sreloc = NULL;
2031 if (dynobj != NULL)
2032 splt = bfd_get_section_by_name (dynobj, ".plt");
2033
2034 rel = relocs;
2035 relend = relocs + NUM_SHDR_ENTRIES (& elf_section_data (input_section)->rel_hdr);
2036 for (; rel < relend; rel++)
2037 {
2038 int r_type;
2039 reloc_howto_type *howto;
2040 unsigned long r_symndx;
2041 struct elf_link_hash_entry *h;
2042 Elf_Internal_Sym *sym;
2043 asection *sec;
2044 bfd_vma relocation, off;
2045 bfd_reloc_status_type r;
2046 bfd_boolean is_plt = FALSE;
2047 bfd_boolean unresolved_reloc;
2048
2049 r_type = ELF64_R_TYPE_ID (rel->r_info);
2050 if (r_type < 0 || r_type >= (int) R_SPARC_max_std)
2051 {
2052 bfd_set_error (bfd_error_bad_value);
2053 return FALSE;
2054 }
2055 howto = sparc64_elf_howto_table + r_type;
2056
2057 /* This is a final link. */
2058 r_symndx = ELF64_R_SYM (rel->r_info);
2059 h = NULL;
2060 sym = NULL;
2061 sec = NULL;
2062 unresolved_reloc = FALSE;
2063 if (r_symndx < symtab_hdr->sh_info)
2064 {
2065 sym = local_syms + r_symndx;
2066 sec = local_sections[r_symndx];
2067 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2068 }
2069 else
2070 {
2071 bfd_boolean warned;
2072
2073 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2074 r_symndx, symtab_hdr, sym_hashes,
2075 h, sec, relocation,
2076 unresolved_reloc, warned);
2077 if (warned)
2078 {
2079 /* To avoid generating warning messages about truncated
2080 relocations, set the relocation's address to be the same as
2081 the start of this section. */
2082 if (input_section->output_section != NULL)
2083 relocation = input_section->output_section->vma;
2084 else
2085 relocation = 0;
2086 }
2087 }
2088
2089 do_dynreloc:
2090 /* When generating a shared object, these relocations are copied
2091 into the output file to be resolved at run time. */
2092 if (info->shared && r_symndx != 0 && (input_section->flags & SEC_ALLOC))
2093 {
2094 switch (r_type)
2095 {
2096 case R_SPARC_PC10:
2097 case R_SPARC_PC22:
2098 case R_SPARC_PC_HH22:
2099 case R_SPARC_PC_HM10:
2100 case R_SPARC_PC_LM22:
2101 if (h != NULL
2102 && !strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_"))
2103 break;
2104 /* Fall through. */
2105 case R_SPARC_DISP8:
2106 case R_SPARC_DISP16:
2107 case R_SPARC_DISP32:
2108 case R_SPARC_DISP64:
2109 case R_SPARC_WDISP30:
2110 case R_SPARC_WDISP22:
2111 case R_SPARC_WDISP19:
2112 case R_SPARC_WDISP16:
2113 if (h == NULL)
2114 break;
2115 /* Fall through. */
2116 case R_SPARC_8:
2117 case R_SPARC_16:
2118 case R_SPARC_32:
2119 case R_SPARC_HI22:
2120 case R_SPARC_22:
2121 case R_SPARC_13:
2122 case R_SPARC_LO10:
2123 case R_SPARC_UA32:
2124 case R_SPARC_10:
2125 case R_SPARC_11:
2126 case R_SPARC_64:
2127 case R_SPARC_OLO10:
2128 case R_SPARC_HH22:
2129 case R_SPARC_HM10:
2130 case R_SPARC_LM22:
2131 case R_SPARC_7:
2132 case R_SPARC_5:
2133 case R_SPARC_6:
2134 case R_SPARC_HIX22:
2135 case R_SPARC_LOX10:
2136 case R_SPARC_H44:
2137 case R_SPARC_M44:
2138 case R_SPARC_L44:
2139 case R_SPARC_UA64:
2140 case R_SPARC_UA16:
2141 {
2142 Elf_Internal_Rela outrel;
2143 bfd_byte *loc;
2144 bfd_boolean skip, relocate;
2145
2146 if (sreloc == NULL)
2147 {
2148 const char *name =
2149 (bfd_elf_string_from_elf_section
2150 (input_bfd,
2151 elf_elfheader (input_bfd)->e_shstrndx,
2152 elf_section_data (input_section)->rel_hdr.sh_name));
2153
2154 if (name == NULL)
2155 return FALSE;
2156
2157 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
2158 && strcmp (bfd_get_section_name(input_bfd,
2159 input_section),
2160 name + 5) == 0);
2161
2162 sreloc = bfd_get_section_by_name (dynobj, name);
2163 BFD_ASSERT (sreloc != NULL);
2164 }
2165
2166 skip = FALSE;
2167 relocate = FALSE;
2168
2169 outrel.r_offset =
2170 _bfd_elf_section_offset (output_bfd, info, input_section,
2171 rel->r_offset);
2172 if (outrel.r_offset == (bfd_vma) -1)
2173 skip = TRUE;
2174 else if (outrel.r_offset == (bfd_vma) -2)
2175 skip = TRUE, relocate = TRUE;
2176
2177 outrel.r_offset += (input_section->output_section->vma
2178 + input_section->output_offset);
2179
2180 /* Optimize unaligned reloc usage now that we know where
2181 it finally resides. */
2182 switch (r_type)
2183 {
2184 case R_SPARC_16:
2185 if (outrel.r_offset & 1) r_type = R_SPARC_UA16;
2186 break;
2187 case R_SPARC_UA16:
2188 if (!(outrel.r_offset & 1)) r_type = R_SPARC_16;
2189 break;
2190 case R_SPARC_32:
2191 if (outrel.r_offset & 3) r_type = R_SPARC_UA32;
2192 break;
2193 case R_SPARC_UA32:
2194 if (!(outrel.r_offset & 3)) r_type = R_SPARC_32;
2195 break;
2196 case R_SPARC_64:
2197 if (outrel.r_offset & 7) r_type = R_SPARC_UA64;
2198 break;
2199 case R_SPARC_UA64:
2200 if (!(outrel.r_offset & 7)) r_type = R_SPARC_64;
2201 break;
2202 case R_SPARC_DISP8:
2203 case R_SPARC_DISP16:
2204 case R_SPARC_DISP32:
2205 case R_SPARC_DISP64:
2206 /* If the symbol is not dynamic, we should not keep
2207 a dynamic relocation. But an .rela.* slot has been
2208 allocated for it, output R_SPARC_NONE.
2209 FIXME: Add code tracking needed dynamic relocs as
2210 e.g. i386 has. */
2211 if (h->dynindx == -1)
2212 skip = TRUE, relocate = TRUE;
2213 break;
2214 }
2215
2216 if (skip)
2217 memset (&outrel, 0, sizeof outrel);
2218 /* h->dynindx may be -1 if the symbol was marked to
2219 become local. */
2220 else if (h != NULL && ! is_plt
2221 && ((! info->symbolic && h->dynindx != -1)
2222 || (h->elf_link_hash_flags
2223 & ELF_LINK_HASH_DEF_REGULAR) == 0))
2224 {
2225 BFD_ASSERT (h->dynindx != -1);
2226 outrel.r_info
2227 = ELF64_R_INFO (h->dynindx,
2228 ELF64_R_TYPE_INFO (
2229 ELF64_R_TYPE_DATA (rel->r_info),
2230 r_type));
2231 outrel.r_addend = rel->r_addend;
2232 }
2233 else
2234 {
2235 outrel.r_addend = relocation + rel->r_addend;
2236 if (r_type == R_SPARC_64)
2237 outrel.r_info = ELF64_R_INFO (0, R_SPARC_RELATIVE);
2238 else
2239 {
2240 long indx;
2241
2242 if (is_plt)
2243 sec = splt;
2244
2245 if (bfd_is_abs_section (sec))
2246 indx = 0;
2247 else if (sec == NULL || sec->owner == NULL)
2248 {
2249 bfd_set_error (bfd_error_bad_value);
2250 return FALSE;
2251 }
2252 else
2253 {
2254 asection *osec;
2255
2256 osec = sec->output_section;
2257 indx = elf_section_data (osec)->dynindx;
2258
2259 /* We are turning this relocation into one
2260 against a section symbol, so subtract out
2261 the output section's address but not the
2262 offset of the input section in the output
2263 section. */
2264 outrel.r_addend -= osec->vma;
2265
2266 /* FIXME: we really should be able to link non-pic
2267 shared libraries. */
2268 if (indx == 0)
2269 {
2270 BFD_FAIL ();
2271 (*_bfd_error_handler)
2272 (_("%s: probably compiled without -fPIC?"),
2273 bfd_archive_filename (input_bfd));
2274 bfd_set_error (bfd_error_bad_value);
2275 return FALSE;
2276 }
2277 }
2278
2279 outrel.r_info
2280 = ELF64_R_INFO (indx,
2281 ELF64_R_TYPE_INFO (
2282 ELF64_R_TYPE_DATA (rel->r_info),
2283 r_type));
2284 }
2285 }
2286
2287 loc = sreloc->contents;
2288 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2289 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2290
2291 /* This reloc will be computed at runtime, so there's no
2292 need to do anything now. */
2293 if (! relocate)
2294 continue;
2295 }
2296 break;
2297 }
2298 }
2299
2300 switch (r_type)
2301 {
2302 case R_SPARC_GOT10:
2303 case R_SPARC_GOT13:
2304 case R_SPARC_GOT22:
2305 /* Relocation is to the entry for this symbol in the global
2306 offset table. */
2307 if (sgot == NULL)
2308 {
2309 sgot = bfd_get_section_by_name (dynobj, ".got");
2310 BFD_ASSERT (sgot != NULL);
2311 }
2312
2313 if (h != NULL)
2314 {
2315 bfd_boolean dyn;
2316
2317 off = h->got.offset;
2318 BFD_ASSERT (off != (bfd_vma) -1);
2319 dyn = elf_hash_table (info)->dynamic_sections_created;
2320
2321 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
2322 || (info->shared
2323 && (info->symbolic
2324 || h->dynindx == -1
2325 || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL))
2326 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)))
2327 {
2328 /* This is actually a static link, or it is a -Bsymbolic
2329 link and the symbol is defined locally, or the symbol
2330 was forced to be local because of a version file. We
2331 must initialize this entry in the global offset table.
2332 Since the offset must always be a multiple of 8, we
2333 use the least significant bit to record whether we
2334 have initialized it already.
2335
2336 When doing a dynamic link, we create a .rela.got
2337 relocation entry to initialize the value. This is
2338 done in the finish_dynamic_symbol routine. */
2339
2340 if ((off & 1) != 0)
2341 off &= ~1;
2342 else
2343 {
2344 bfd_put_64 (output_bfd, relocation,
2345 sgot->contents + off);
2346 h->got.offset |= 1;
2347 }
2348 }
2349 else
2350 unresolved_reloc = FALSE;
2351 }
2352 else
2353 {
2354 BFD_ASSERT (local_got_offsets != NULL);
2355 off = local_got_offsets[r_symndx];
2356 BFD_ASSERT (off != (bfd_vma) -1);
2357
2358 /* The offset must always be a multiple of 8. We use
2359 the least significant bit to record whether we have
2360 already processed this entry. */
2361 if ((off & 1) != 0)
2362 off &= ~1;
2363 else
2364 {
2365 local_got_offsets[r_symndx] |= 1;
2366
2367 if (info->shared)
2368 {
2369 asection *s;
2370 Elf_Internal_Rela outrel;
2371 bfd_byte *loc;
2372
2373 /* The Solaris 2.7 64-bit linker adds the contents
2374 of the location to the value of the reloc.
2375 Note this is different behaviour to the
2376 32-bit linker, which both adds the contents
2377 and ignores the addend. So clear the location. */
2378 bfd_put_64 (output_bfd, (bfd_vma) 0,
2379 sgot->contents + off);
2380
2381 /* We need to generate a R_SPARC_RELATIVE reloc
2382 for the dynamic linker. */
2383 s = bfd_get_section_by_name(dynobj, ".rela.got");
2384 BFD_ASSERT (s != NULL);
2385
2386 outrel.r_offset = (sgot->output_section->vma
2387 + sgot->output_offset
2388 + off);
2389 outrel.r_info = ELF64_R_INFO (0, R_SPARC_RELATIVE);
2390 outrel.r_addend = relocation;
2391 loc = s->contents;
2392 loc += s->reloc_count++ * sizeof (Elf64_External_Rela);
2393 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2394 }
2395 else
2396 bfd_put_64 (output_bfd, relocation, sgot->contents + off);
2397 }
2398 }
2399 relocation = sgot->output_offset + off - got_base;
2400 goto do_default;
2401
2402 case R_SPARC_WPLT30:
2403 case R_SPARC_PLT32:
2404 case R_SPARC_HIPLT22:
2405 case R_SPARC_LOPLT10:
2406 case R_SPARC_PCPLT32:
2407 case R_SPARC_PCPLT22:
2408 case R_SPARC_PCPLT10:
2409 case R_SPARC_PLT64:
2410 /* Relocation is to the entry for this symbol in the
2411 procedure linkage table. */
2412 BFD_ASSERT (h != NULL);
2413
2414 if (h->plt.offset == (bfd_vma) -1 || splt == NULL)
2415 {
2416 /* We didn't make a PLT entry for this symbol. This
2417 happens when statically linking PIC code, or when
2418 using -Bsymbolic. */
2419 goto do_default;
2420 }
2421
2422 relocation = (splt->output_section->vma
2423 + splt->output_offset
2424 + sparc64_elf_plt_entry_offset (h->plt.offset));
2425 unresolved_reloc = FALSE;
2426 if (r_type == R_SPARC_WPLT30)
2427 goto do_wplt30;
2428 if (r_type == R_SPARC_PLT32 || r_type == R_SPARC_PLT64)
2429 {
2430 r_type = r_type == R_SPARC_PLT32 ? R_SPARC_32 : R_SPARC_64;
2431 is_plt = TRUE;
2432 goto do_dynreloc;
2433 }
2434 goto do_default;
2435
2436 case R_SPARC_OLO10:
2437 {
2438 bfd_vma x;
2439
2440 relocation += rel->r_addend;
2441 relocation = (relocation & 0x3ff) + ELF64_R_TYPE_DATA (rel->r_info);
2442
2443 x = bfd_get_32 (input_bfd, contents + rel->r_offset);
2444 x = (x & ~(bfd_vma) 0x1fff) | (relocation & 0x1fff);
2445 bfd_put_32 (input_bfd, x, contents + rel->r_offset);
2446
2447 r = bfd_check_overflow (howto->complain_on_overflow,
2448 howto->bitsize, howto->rightshift,
2449 bfd_arch_bits_per_address (input_bfd),
2450 relocation);
2451 }
2452 break;
2453
2454 case R_SPARC_WDISP16:
2455 {
2456 bfd_vma x;
2457
2458 relocation += rel->r_addend;
2459 /* Adjust for pc-relative-ness. */
2460 relocation -= (input_section->output_section->vma
2461 + input_section->output_offset);
2462 relocation -= rel->r_offset;
2463
2464 x = bfd_get_32 (input_bfd, contents + rel->r_offset);
2465 x &= ~(bfd_vma) 0x303fff;
2466 x |= ((((relocation >> 2) & 0xc000) << 6)
2467 | ((relocation >> 2) & 0x3fff));
2468 bfd_put_32 (input_bfd, x, contents + rel->r_offset);
2469
2470 r = bfd_check_overflow (howto->complain_on_overflow,
2471 howto->bitsize, howto->rightshift,
2472 bfd_arch_bits_per_address (input_bfd),
2473 relocation);
2474 }
2475 break;
2476
2477 case R_SPARC_HIX22:
2478 {
2479 bfd_vma x;
2480
2481 relocation += rel->r_addend;
2482 relocation = relocation ^ MINUS_ONE;
2483
2484 x = bfd_get_32 (input_bfd, contents + rel->r_offset);
2485 x = (x & ~(bfd_vma) 0x3fffff) | ((relocation >> 10) & 0x3fffff);
2486 bfd_put_32 (input_bfd, x, contents + rel->r_offset);
2487
2488 r = bfd_check_overflow (howto->complain_on_overflow,
2489 howto->bitsize, howto->rightshift,
2490 bfd_arch_bits_per_address (input_bfd),
2491 relocation);
2492 }
2493 break;
2494
2495 case R_SPARC_LOX10:
2496 {
2497 bfd_vma x;
2498
2499 relocation += rel->r_addend;
2500 relocation = (relocation & 0x3ff) | 0x1c00;
2501
2502 x = bfd_get_32 (input_bfd, contents + rel->r_offset);
2503 x = (x & ~(bfd_vma) 0x1fff) | relocation;
2504 bfd_put_32 (input_bfd, x, contents + rel->r_offset);
2505
2506 r = bfd_reloc_ok;
2507 }
2508 break;
2509
2510 case R_SPARC_WDISP30:
2511 do_wplt30:
2512 if (sec_do_relax (input_section)
2513 && rel->r_offset + 4 < input_section->_raw_size)
2514 {
2515 #define G0 0
2516 #define O7 15
2517 #define XCC (2 << 20)
2518 #define COND(x) (((x)&0xf)<<25)
2519 #define CONDA COND(0x8)
2520 #define INSN_BPA (F2(0,1) | CONDA | BPRED | XCC)
2521 #define INSN_BA (F2(0,2) | CONDA)
2522 #define INSN_OR F3(2, 0x2, 0)
2523 #define INSN_NOP F2(0,4)
2524
2525 bfd_vma x, y;
2526
2527 /* If the instruction is a call with either:
2528 restore
2529 arithmetic instruction with rd == %o7
2530 where rs1 != %o7 and rs2 if it is register != %o7
2531 then we can optimize if the call destination is near
2532 by changing the call into a branch always. */
2533 x = bfd_get_32 (input_bfd, contents + rel->r_offset);
2534 y = bfd_get_32 (input_bfd, contents + rel->r_offset + 4);
2535 if ((x & OP(~0)) == OP(1) && (y & OP(~0)) == OP(2))
2536 {
2537 if (((y & OP3(~0)) == OP3(0x3d) /* restore */
2538 || ((y & OP3(0x28)) == 0 /* arithmetic */
2539 && (y & RD(~0)) == RD(O7)))
2540 && (y & RS1(~0)) != RS1(O7)
2541 && ((y & F3I(~0))
2542 || (y & RS2(~0)) != RS2(O7)))
2543 {
2544 bfd_vma reloc;
2545
2546 reloc = relocation + rel->r_addend - rel->r_offset;
2547 reloc -= (input_section->output_section->vma
2548 + input_section->output_offset);
2549 if (reloc & 3)
2550 goto do_default;
2551
2552 /* Ensure the branch fits into simm22. */
2553 if ((reloc & ~(bfd_vma)0x7fffff)
2554 && ((reloc | 0x7fffff) != MINUS_ONE))
2555 goto do_default;
2556 reloc >>= 2;
2557
2558 /* Check whether it fits into simm19. */
2559 if ((reloc & 0x3c0000) == 0
2560 || (reloc & 0x3c0000) == 0x3c0000)
2561 x = INSN_BPA | (reloc & 0x7ffff); /* ba,pt %xcc */
2562 else
2563 x = INSN_BA | (reloc & 0x3fffff); /* ba */
2564 bfd_put_32 (input_bfd, x, contents + rel->r_offset);
2565 r = bfd_reloc_ok;
2566 if (rel->r_offset >= 4
2567 && (y & (0xffffffff ^ RS1(~0)))
2568 == (INSN_OR | RD(O7) | RS2(G0)))
2569 {
2570 bfd_vma z;
2571 unsigned int reg;
2572
2573 z = bfd_get_32 (input_bfd,
2574 contents + rel->r_offset - 4);
2575 if ((z & (0xffffffff ^ RD(~0)))
2576 != (INSN_OR | RS1(O7) | RS2(G0)))
2577 break;
2578
2579 /* The sequence was
2580 or %o7, %g0, %rN
2581 call foo
2582 or %rN, %g0, %o7
2583
2584 If call foo was replaced with ba, replace
2585 or %rN, %g0, %o7 with nop. */
2586
2587 reg = (y & RS1(~0)) >> 14;
2588 if (reg != ((z & RD(~0)) >> 25)
2589 || reg == G0 || reg == O7)
2590 break;
2591
2592 bfd_put_32 (input_bfd, (bfd_vma) INSN_NOP,
2593 contents + rel->r_offset + 4);
2594 }
2595 break;
2596 }
2597 }
2598 }
2599 /* Fall through. */
2600
2601 default:
2602 do_default:
2603 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
2604 contents, rel->r_offset,
2605 relocation, rel->r_addend);
2606 break;
2607 }
2608
2609 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
2610 because such sections are not SEC_ALLOC and thus ld.so will
2611 not process them. */
2612 if (unresolved_reloc
2613 && !((input_section->flags & SEC_DEBUGGING) != 0
2614 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
2615 (*_bfd_error_handler)
2616 (_("%s(%s+0x%lx): unresolvable relocation against symbol `%s'"),
2617 bfd_archive_filename (input_bfd),
2618 bfd_get_section_name (input_bfd, input_section),
2619 (long) rel->r_offset,
2620 h->root.root.string);
2621
2622 switch (r)
2623 {
2624 case bfd_reloc_ok:
2625 break;
2626
2627 default:
2628 case bfd_reloc_outofrange:
2629 abort ();
2630
2631 case bfd_reloc_overflow:
2632 {
2633 const char *name;
2634
2635 /* The Solaris native linker silently disregards
2636 overflows. We don't, but this breaks stabs debugging
2637 info, whose relocations are only 32-bits wide. Ignore
2638 overflows for discarded entries. */
2639 if ((r_type == R_SPARC_32 || r_type == R_SPARC_DISP32)
2640 && _bfd_elf_section_offset (output_bfd, info, input_section,
2641 rel->r_offset) == (bfd_vma) -1)
2642 break;
2643
2644 if (h != NULL)
2645 {
2646 if (h->root.type == bfd_link_hash_undefweak
2647 && howto->pc_relative)
2648 {
2649 /* Assume this is a call protected by other code that
2650 detect the symbol is undefined. If this is the case,
2651 we can safely ignore the overflow. If not, the
2652 program is hosed anyway, and a little warning isn't
2653 going to help. */
2654 break;
2655 }
2656
2657 name = h->root.root.string;
2658 }
2659 else
2660 {
2661 name = (bfd_elf_string_from_elf_section
2662 (input_bfd,
2663 symtab_hdr->sh_link,
2664 sym->st_name));
2665 if (name == NULL)
2666 return FALSE;
2667 if (*name == '\0')
2668 name = bfd_section_name (input_bfd, sec);
2669 }
2670 if (! ((*info->callbacks->reloc_overflow)
2671 (info, name, howto->name, (bfd_vma) 0,
2672 input_bfd, input_section, rel->r_offset)))
2673 return FALSE;
2674 }
2675 break;
2676 }
2677 }
2678
2679 return TRUE;
2680 }
2681
2682 /* Finish up dynamic symbol handling. We set the contents of various
2683 dynamic sections here. */
2684
2685 static bfd_boolean
sparc64_elf_finish_dynamic_symbol(output_bfd,info,h,sym)2686 sparc64_elf_finish_dynamic_symbol (output_bfd, info, h, sym)
2687 bfd *output_bfd;
2688 struct bfd_link_info *info;
2689 struct elf_link_hash_entry *h;
2690 Elf_Internal_Sym *sym;
2691 {
2692 bfd *dynobj;
2693
2694 dynobj = elf_hash_table (info)->dynobj;
2695
2696 if (h->plt.offset != (bfd_vma) -1)
2697 {
2698 asection *splt;
2699 asection *srela;
2700 Elf_Internal_Rela rela;
2701 bfd_byte *loc;
2702
2703 /* This symbol has an entry in the PLT. Set it up. */
2704
2705 BFD_ASSERT (h->dynindx != -1);
2706
2707 splt = bfd_get_section_by_name (dynobj, ".plt");
2708 srela = bfd_get_section_by_name (dynobj, ".rela.plt");
2709 BFD_ASSERT (splt != NULL && srela != NULL);
2710
2711 /* Fill in the entry in the .rela.plt section. */
2712
2713 if (h->plt.offset < LARGE_PLT_THRESHOLD)
2714 {
2715 rela.r_offset = sparc64_elf_plt_entry_offset (h->plt.offset);
2716 rela.r_addend = 0;
2717 }
2718 else
2719 {
2720 bfd_vma max = splt->_raw_size / PLT_ENTRY_SIZE;
2721 rela.r_offset = sparc64_elf_plt_ptr_offset (h->plt.offset, max);
2722 rela.r_addend = -(sparc64_elf_plt_entry_offset (h->plt.offset) + 4)
2723 -(splt->output_section->vma + splt->output_offset);
2724 }
2725 rela.r_offset += (splt->output_section->vma + splt->output_offset);
2726 rela.r_info = ELF64_R_INFO (h->dynindx, R_SPARC_JMP_SLOT);
2727
2728 /* Adjust for the first 4 reserved elements in the .plt section
2729 when setting the offset in the .rela.plt section.
2730 Sun forgot to read their own ABI and copied elf32-sparc behaviour,
2731 thus .plt[4] has corresponding .rela.plt[0] and so on. */
2732
2733 loc = srela->contents;
2734 loc += (h->plt.offset - 4) * sizeof (Elf64_External_Rela);
2735 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
2736
2737 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
2738 {
2739 /* Mark the symbol as undefined, rather than as defined in
2740 the .plt section. Leave the value alone. */
2741 sym->st_shndx = SHN_UNDEF;
2742 /* If the symbol is weak, we do need to clear the value.
2743 Otherwise, the PLT entry would provide a definition for
2744 the symbol even if the symbol wasn't defined anywhere,
2745 and so the symbol would never be NULL. */
2746 if ((h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR_NONWEAK)
2747 == 0)
2748 sym->st_value = 0;
2749 }
2750 }
2751
2752 if (h->got.offset != (bfd_vma) -1)
2753 {
2754 asection *sgot;
2755 asection *srela;
2756 Elf_Internal_Rela rela;
2757 bfd_byte *loc;
2758
2759 /* This symbol has an entry in the GOT. Set it up. */
2760
2761 sgot = bfd_get_section_by_name (dynobj, ".got");
2762 srela = bfd_get_section_by_name (dynobj, ".rela.got");
2763 BFD_ASSERT (sgot != NULL && srela != NULL);
2764
2765 rela.r_offset = (sgot->output_section->vma
2766 + sgot->output_offset
2767 + (h->got.offset &~ (bfd_vma) 1));
2768
2769 /* If this is a -Bsymbolic link, and the symbol is defined
2770 locally, we just want to emit a RELATIVE reloc. Likewise if
2771 the symbol was forced to be local because of a version file.
2772 The entry in the global offset table will already have been
2773 initialized in the relocate_section function. */
2774 if (info->shared
2775 && (info->symbolic || h->dynindx == -1)
2776 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
2777 {
2778 asection *sec = h->root.u.def.section;
2779 rela.r_info = ELF64_R_INFO (0, R_SPARC_RELATIVE);
2780 rela.r_addend = (h->root.u.def.value
2781 + sec->output_section->vma
2782 + sec->output_offset);
2783 }
2784 else
2785 {
2786 rela.r_info = ELF64_R_INFO (h->dynindx, R_SPARC_GLOB_DAT);
2787 rela.r_addend = 0;
2788 }
2789
2790 bfd_put_64 (output_bfd, (bfd_vma) 0,
2791 sgot->contents + (h->got.offset &~ (bfd_vma) 1));
2792 loc = srela->contents;
2793 loc += srela->reloc_count++ * sizeof (Elf64_External_Rela);
2794 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
2795 }
2796
2797 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
2798 {
2799 asection *s;
2800 Elf_Internal_Rela rela;
2801 bfd_byte *loc;
2802
2803 /* This symbols needs a copy reloc. Set it up. */
2804 BFD_ASSERT (h->dynindx != -1);
2805
2806 s = bfd_get_section_by_name (h->root.u.def.section->owner,
2807 ".rela.bss");
2808 BFD_ASSERT (s != NULL);
2809
2810 rela.r_offset = (h->root.u.def.value
2811 + h->root.u.def.section->output_section->vma
2812 + h->root.u.def.section->output_offset);
2813 rela.r_info = ELF64_R_INFO (h->dynindx, R_SPARC_COPY);
2814 rela.r_addend = 0;
2815 loc = s->contents + s->reloc_count++ * sizeof (Elf64_External_Rela);
2816 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
2817 }
2818
2819 /* Mark some specially defined symbols as absolute. */
2820 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
2821 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
2822 || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0)
2823 sym->st_shndx = SHN_ABS;
2824
2825 return TRUE;
2826 }
2827
2828 /* Finish up the dynamic sections. */
2829
2830 static bfd_boolean
sparc64_elf_finish_dynamic_sections(output_bfd,info)2831 sparc64_elf_finish_dynamic_sections (output_bfd, info)
2832 bfd *output_bfd;
2833 struct bfd_link_info *info;
2834 {
2835 bfd *dynobj;
2836 int stt_regidx = -1;
2837 asection *sdyn;
2838 asection *sgot;
2839
2840 dynobj = elf_hash_table (info)->dynobj;
2841
2842 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
2843
2844 if (elf_hash_table (info)->dynamic_sections_created)
2845 {
2846 asection *splt;
2847 Elf64_External_Dyn *dyncon, *dynconend;
2848
2849 splt = bfd_get_section_by_name (dynobj, ".plt");
2850 BFD_ASSERT (splt != NULL && sdyn != NULL);
2851
2852 dyncon = (Elf64_External_Dyn *) sdyn->contents;
2853 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
2854 for (; dyncon < dynconend; dyncon++)
2855 {
2856 Elf_Internal_Dyn dyn;
2857 const char *name;
2858 bfd_boolean size;
2859
2860 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
2861
2862 switch (dyn.d_tag)
2863 {
2864 case DT_PLTGOT: name = ".plt"; size = FALSE; break;
2865 case DT_PLTRELSZ: name = ".rela.plt"; size = TRUE; break;
2866 case DT_JMPREL: name = ".rela.plt"; size = FALSE; break;
2867 case DT_SPARC_REGISTER:
2868 if (stt_regidx == -1)
2869 {
2870 stt_regidx =
2871 _bfd_elf_link_lookup_local_dynindx (info, output_bfd, -1);
2872 if (stt_regidx == -1)
2873 return FALSE;
2874 }
2875 dyn.d_un.d_val = stt_regidx++;
2876 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
2877 /* fallthrough */
2878 default: name = NULL; size = FALSE; break;
2879 }
2880
2881 if (name != NULL)
2882 {
2883 asection *s;
2884
2885 s = bfd_get_section_by_name (output_bfd, name);
2886 if (s == NULL)
2887 dyn.d_un.d_val = 0;
2888 else
2889 {
2890 if (! size)
2891 dyn.d_un.d_ptr = s->vma;
2892 else
2893 {
2894 if (s->_cooked_size != 0)
2895 dyn.d_un.d_val = s->_cooked_size;
2896 else
2897 dyn.d_un.d_val = s->_raw_size;
2898 }
2899 }
2900 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
2901 }
2902 }
2903
2904 /* Initialize the contents of the .plt section. */
2905 if (splt->_raw_size > 0)
2906 sparc64_elf_build_plt (output_bfd, splt->contents,
2907 (int) (splt->_raw_size / PLT_ENTRY_SIZE));
2908
2909 elf_section_data (splt->output_section)->this_hdr.sh_entsize =
2910 PLT_ENTRY_SIZE;
2911 }
2912
2913 /* Set the first entry in the global offset table to the address of
2914 the dynamic section. */
2915 sgot = bfd_get_section_by_name (dynobj, ".got");
2916 BFD_ASSERT (sgot != NULL);
2917 if (sgot->_raw_size > 0)
2918 {
2919 if (sdyn == NULL)
2920 bfd_put_64 (output_bfd, (bfd_vma) 0, sgot->contents);
2921 else
2922 bfd_put_64 (output_bfd,
2923 sdyn->output_section->vma + sdyn->output_offset,
2924 sgot->contents);
2925 }
2926
2927 elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 8;
2928
2929 return TRUE;
2930 }
2931
2932 static enum elf_reloc_type_class
sparc64_elf_reloc_type_class(rela)2933 sparc64_elf_reloc_type_class (rela)
2934 const Elf_Internal_Rela *rela;
2935 {
2936 switch ((int) ELF64_R_TYPE (rela->r_info))
2937 {
2938 case R_SPARC_RELATIVE:
2939 return reloc_class_relative;
2940 case R_SPARC_JMP_SLOT:
2941 return reloc_class_plt;
2942 case R_SPARC_COPY:
2943 return reloc_class_copy;
2944 default:
2945 return reloc_class_normal;
2946 }
2947 }
2948
2949 /* Functions for dealing with the e_flags field. */
2950
2951 /* Merge backend specific data from an object file to the output
2952 object file when linking. */
2953
2954 static bfd_boolean
sparc64_elf_merge_private_bfd_data(ibfd,obfd)2955 sparc64_elf_merge_private_bfd_data (ibfd, obfd)
2956 bfd *ibfd;
2957 bfd *obfd;
2958 {
2959 bfd_boolean error;
2960 flagword new_flags, old_flags;
2961 int new_mm, old_mm;
2962
2963 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
2964 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
2965 return TRUE;
2966
2967 new_flags = elf_elfheader (ibfd)->e_flags;
2968 old_flags = elf_elfheader (obfd)->e_flags;
2969
2970 if (!elf_flags_init (obfd)) /* First call, no flags set */
2971 {
2972 elf_flags_init (obfd) = TRUE;
2973 elf_elfheader (obfd)->e_flags = new_flags;
2974 }
2975
2976 else if (new_flags == old_flags) /* Compatible flags are ok */
2977 ;
2978
2979 else /* Incompatible flags */
2980 {
2981 error = FALSE;
2982
2983 #define EF_SPARC_ISA_EXTENSIONS \
2984 (EF_SPARC_SUN_US1 | EF_SPARC_SUN_US3 | EF_SPARC_HAL_R1)
2985
2986 if ((ibfd->flags & DYNAMIC) != 0)
2987 {
2988 /* We don't want dynamic objects memory ordering and
2989 architecture to have any role. That's what dynamic linker
2990 should do. */
2991 new_flags &= ~(EF_SPARCV9_MM | EF_SPARC_ISA_EXTENSIONS);
2992 new_flags |= (old_flags
2993 & (EF_SPARCV9_MM | EF_SPARC_ISA_EXTENSIONS));
2994 }
2995 else
2996 {
2997 /* Choose the highest architecture requirements. */
2998 old_flags |= (new_flags & EF_SPARC_ISA_EXTENSIONS);
2999 new_flags |= (old_flags & EF_SPARC_ISA_EXTENSIONS);
3000 if ((old_flags & (EF_SPARC_SUN_US1 | EF_SPARC_SUN_US3))
3001 && (old_flags & EF_SPARC_HAL_R1))
3002 {
3003 error = TRUE;
3004 (*_bfd_error_handler)
3005 (_("%s: linking UltraSPARC specific with HAL specific code"),
3006 bfd_archive_filename (ibfd));
3007 }
3008 /* Choose the most restrictive memory ordering. */
3009 old_mm = (old_flags & EF_SPARCV9_MM);
3010 new_mm = (new_flags & EF_SPARCV9_MM);
3011 old_flags &= ~EF_SPARCV9_MM;
3012 new_flags &= ~EF_SPARCV9_MM;
3013 if (new_mm < old_mm)
3014 old_mm = new_mm;
3015 old_flags |= old_mm;
3016 new_flags |= old_mm;
3017 }
3018
3019 /* Warn about any other mismatches */
3020 if (new_flags != old_flags)
3021 {
3022 error = TRUE;
3023 (*_bfd_error_handler)
3024 (_("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"),
3025 bfd_archive_filename (ibfd), (long) new_flags, (long) old_flags);
3026 }
3027
3028 elf_elfheader (obfd)->e_flags = old_flags;
3029
3030 if (error)
3031 {
3032 bfd_set_error (bfd_error_bad_value);
3033 return FALSE;
3034 }
3035 }
3036 return TRUE;
3037 }
3038
3039 /* MARCO: Set the correct entry size for the .stab section. */
3040
3041 static bfd_boolean
sparc64_elf_fake_sections(abfd,hdr,sec)3042 sparc64_elf_fake_sections (abfd, hdr, sec)
3043 bfd *abfd ATTRIBUTE_UNUSED;
3044 Elf_Internal_Shdr *hdr ATTRIBUTE_UNUSED;
3045 asection *sec;
3046 {
3047 const char *name;
3048
3049 name = bfd_get_section_name (abfd, sec);
3050
3051 if (strcmp (name, ".stab") == 0)
3052 {
3053 /* Even in the 64bit case the stab entries are only 12 bytes long. */
3054 elf_section_data (sec)->this_hdr.sh_entsize = 12;
3055 }
3056
3057 return TRUE;
3058 }
3059
3060 /* Print a STT_REGISTER symbol to file FILE. */
3061
3062 static const char *
sparc64_elf_print_symbol_all(abfd,filep,symbol)3063 sparc64_elf_print_symbol_all (abfd, filep, symbol)
3064 bfd *abfd ATTRIBUTE_UNUSED;
3065 PTR filep;
3066 asymbol *symbol;
3067 {
3068 FILE *file = (FILE *) filep;
3069 int reg, type;
3070
3071 if (ELF_ST_TYPE (((elf_symbol_type *) symbol)->internal_elf_sym.st_info)
3072 != STT_REGISTER)
3073 return NULL;
3074
3075 reg = ((elf_symbol_type *) symbol)->internal_elf_sym.st_value;
3076 type = symbol->flags;
3077 fprintf (file, "REG_%c%c%11s%c%c R", "GOLI" [reg / 8], '0' + (reg & 7), "",
3078 ((type & BSF_LOCAL)
3079 ? (type & BSF_GLOBAL) ? '!' : 'l'
3080 : (type & BSF_GLOBAL) ? 'g' : ' '),
3081 (type & BSF_WEAK) ? 'w' : ' ');
3082 if (symbol->name == NULL || symbol->name [0] == '\0')
3083 return "#scratch";
3084 else
3085 return symbol->name;
3086 }
3087
3088 /* Set the right machine number for a SPARC64 ELF file. */
3089
3090 static bfd_boolean
sparc64_elf_object_p(abfd)3091 sparc64_elf_object_p (abfd)
3092 bfd *abfd;
3093 {
3094 unsigned long mach = bfd_mach_sparc_v9;
3095
3096 if (elf_elfheader (abfd)->e_flags & EF_SPARC_SUN_US3)
3097 mach = bfd_mach_sparc_v9b;
3098 else if (elf_elfheader (abfd)->e_flags & EF_SPARC_SUN_US1)
3099 mach = bfd_mach_sparc_v9a;
3100 return bfd_default_set_arch_mach (abfd, bfd_arch_sparc, mach);
3101 }
3102
3103 /* Relocations in the 64 bit SPARC ELF ABI are more complex than in
3104 standard ELF, because R_SPARC_OLO10 has secondary addend in
3105 ELF64_R_TYPE_DATA field. This structure is used to redirect the
3106 relocation handling routines. */
3107
3108 const struct elf_size_info sparc64_elf_size_info =
3109 {
3110 sizeof (Elf64_External_Ehdr),
3111 sizeof (Elf64_External_Phdr),
3112 sizeof (Elf64_External_Shdr),
3113 sizeof (Elf64_External_Rel),
3114 sizeof (Elf64_External_Rela),
3115 sizeof (Elf64_External_Sym),
3116 sizeof (Elf64_External_Dyn),
3117 sizeof (Elf_External_Note),
3118 4, /* hash-table entry size. */
3119 /* Internal relocations per external relocations.
3120 For link purposes we use just 1 internal per
3121 1 external, for assembly and slurp symbol table
3122 we use 2. */
3123 1,
3124 64, /* arch_size. */
3125 3, /* log_file_align. */
3126 ELFCLASS64,
3127 EV_CURRENT,
3128 bfd_elf64_write_out_phdrs,
3129 bfd_elf64_write_shdrs_and_ehdr,
3130 sparc64_elf_write_relocs,
3131 bfd_elf64_swap_symbol_in,
3132 bfd_elf64_swap_symbol_out,
3133 sparc64_elf_slurp_reloc_table,
3134 bfd_elf64_slurp_symbol_table,
3135 bfd_elf64_swap_dyn_in,
3136 bfd_elf64_swap_dyn_out,
3137 bfd_elf64_swap_reloc_in,
3138 bfd_elf64_swap_reloc_out,
3139 bfd_elf64_swap_reloca_in,
3140 bfd_elf64_swap_reloca_out
3141 };
3142
3143 #define TARGET_BIG_SYM bfd_elf64_sparc_vec
3144 #define TARGET_BIG_NAME "elf64-sparc"
3145 #define ELF_ARCH bfd_arch_sparc
3146 #define ELF_MAXPAGESIZE 0x100000
3147
3148 /* This is the official ABI value. */
3149 #define ELF_MACHINE_CODE EM_SPARCV9
3150
3151 /* This is the value that we used before the ABI was released. */
3152 #define ELF_MACHINE_ALT1 EM_OLD_SPARCV9
3153
3154 #define bfd_elf64_bfd_link_hash_table_create \
3155 sparc64_elf_bfd_link_hash_table_create
3156
3157 #define elf_info_to_howto \
3158 sparc64_elf_info_to_howto
3159 #define bfd_elf64_get_reloc_upper_bound \
3160 sparc64_elf_get_reloc_upper_bound
3161 #define bfd_elf64_get_dynamic_reloc_upper_bound \
3162 sparc64_elf_get_dynamic_reloc_upper_bound
3163 #define bfd_elf64_canonicalize_reloc \
3164 sparc64_elf_canonicalize_reloc
3165 #define bfd_elf64_canonicalize_dynamic_reloc \
3166 sparc64_elf_canonicalize_dynamic_reloc
3167 #define bfd_elf64_bfd_reloc_type_lookup \
3168 sparc64_elf_reloc_type_lookup
3169 #define bfd_elf64_bfd_relax_section \
3170 sparc64_elf_relax_section
3171 #define bfd_elf64_new_section_hook \
3172 sparc64_elf_new_section_hook
3173
3174 #define elf_backend_create_dynamic_sections \
3175 _bfd_elf_create_dynamic_sections
3176 #define elf_backend_add_symbol_hook \
3177 sparc64_elf_add_symbol_hook
3178 #define elf_backend_get_symbol_type \
3179 sparc64_elf_get_symbol_type
3180 #define elf_backend_symbol_processing \
3181 sparc64_elf_symbol_processing
3182 #define elf_backend_check_relocs \
3183 sparc64_elf_check_relocs
3184 #define elf_backend_adjust_dynamic_symbol \
3185 sparc64_elf_adjust_dynamic_symbol
3186 #define elf_backend_size_dynamic_sections \
3187 sparc64_elf_size_dynamic_sections
3188 #define elf_backend_relocate_section \
3189 sparc64_elf_relocate_section
3190 #define elf_backend_finish_dynamic_symbol \
3191 sparc64_elf_finish_dynamic_symbol
3192 #define elf_backend_finish_dynamic_sections \
3193 sparc64_elf_finish_dynamic_sections
3194 #define elf_backend_print_symbol_all \
3195 sparc64_elf_print_symbol_all
3196 #define elf_backend_output_arch_syms \
3197 sparc64_elf_output_arch_syms
3198 #define bfd_elf64_bfd_merge_private_bfd_data \
3199 sparc64_elf_merge_private_bfd_data
3200 #define elf_backend_fake_sections \
3201 sparc64_elf_fake_sections
3202
3203 #define elf_backend_size_info \
3204 sparc64_elf_size_info
3205 #define elf_backend_object_p \
3206 sparc64_elf_object_p
3207 #define elf_backend_reloc_type_class \
3208 sparc64_elf_reloc_type_class
3209
3210 #define elf_backend_want_got_plt 0
3211 #define elf_backend_plt_readonly 0
3212 #define elf_backend_want_plt_sym 1
3213 #define elf_backend_rela_normal 1
3214
3215 /* Section 5.2.4 of the ABI specifies a 256-byte boundary for the table. */
3216 #define elf_backend_plt_alignment 8
3217
3218 #define elf_backend_got_header_size 8
3219
3220 #include "elf64-target.h"
3221