| 1 | /* SPARC-specific support for 32-bit ELF |
| 2 | Copyright (C) 1993, 1994, 1995, 1996, 1997 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of BFD, the Binary File Descriptor library. |
| 5 | |
| 6 | This program is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 2 of the License, or |
| 9 | (at your option) any later version. |
| 10 | |
| 11 | This program is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with this program; if not, write to the Free Software |
| 18 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 19 | |
| 20 | #include "bfd.h" |
| 21 | #include "sysdep.h" |
| 22 | #include "bfdlink.h" |
| 23 | #include "libbfd.h" |
| 24 | #include "elf-bfd.h" |
| 25 | #include "elf/sparc.h" |
| 26 | |
| 27 | static reloc_howto_type *elf32_sparc_reloc_type_lookup |
| 28 | PARAMS ((bfd *, bfd_reloc_code_real_type)); |
| 29 | static void elf32_sparc_info_to_howto |
| 30 | PARAMS ((bfd *, arelent *, Elf_Internal_Rela *)); |
| 31 | static boolean elf32_sparc_check_relocs |
| 32 | PARAMS ((bfd *, struct bfd_link_info *, asection *, |
| 33 | const Elf_Internal_Rela *)); |
| 34 | static boolean elf32_sparc_adjust_dynamic_symbol |
| 35 | PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); |
| 36 | static boolean elf32_sparc_adjust_dynindx |
| 37 | PARAMS ((struct elf_link_hash_entry *, PTR)); |
| 38 | static boolean elf32_sparc_size_dynamic_sections |
| 39 | PARAMS ((bfd *, struct bfd_link_info *)); |
| 40 | static boolean elf32_sparc_relocate_section |
| 41 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, |
| 42 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); |
| 43 | static boolean elf32_sparc_finish_dynamic_symbol |
| 44 | PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, |
| 45 | Elf_Internal_Sym *)); |
| 46 | static boolean elf32_sparc_finish_dynamic_sections |
| 47 | PARAMS ((bfd *, struct bfd_link_info *)); |
| 48 | static boolean elf32_sparc_merge_private_bfd_data PARAMS ((bfd *, bfd *)); |
| 49 | static boolean elf32_sparc_object_p |
| 50 | PARAMS ((bfd *)); |
| 51 | static void elf32_sparc_final_write_processing |
| 52 | PARAMS ((bfd *, boolean)); |
| 53 | \f |
| 54 | /* The howto table and associated functions. |
| 55 | ??? elf64-sparc.c has its own copy for the moment to ease transition |
| 56 | since some of the relocation values have changed. At some point we'll |
| 57 | want elf64-sparc.c to switch over and use this table. |
| 58 | ??? Do we want to recognize (or flag as errors) some of the 64 bit entries |
| 59 | if the target is elf32-sparc. |
| 60 | */ |
| 61 | |
| 62 | static bfd_reloc_status_type sparc_elf_notsupported_reloc |
| 63 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| 64 | static bfd_reloc_status_type sparc_elf_wdisp16_reloc |
| 65 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| 66 | |
| 67 | reloc_howto_type _bfd_sparc_elf_howto_table[] = |
| 68 | { |
| 69 | HOWTO(R_SPARC_NONE, 0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_NONE", false,0,0x00000000,true), |
| 70 | HOWTO(R_SPARC_8, 0,0, 8,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_8", false,0,0x000000ff,true), |
| 71 | HOWTO(R_SPARC_16, 0,1,16,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_16", false,0,0x0000ffff,true), |
| 72 | HOWTO(R_SPARC_32, 0,2,32,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_32", false,0,0xffffffff,true), |
| 73 | HOWTO(R_SPARC_DISP8, 0,0, 8,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_DISP8", false,0,0x000000ff,true), |
| 74 | HOWTO(R_SPARC_DISP16, 0,1,16,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_DISP16", false,0,0x0000ffff,true), |
| 75 | HOWTO(R_SPARC_DISP32, 0,2,32,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_DISP32", false,0,0x00ffffff,true), |
| 76 | HOWTO(R_SPARC_WDISP30, 2,2,30,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_WDISP30", false,0,0x3fffffff,true), |
| 77 | HOWTO(R_SPARC_WDISP22, 2,2,22,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_WDISP22", false,0,0x003fffff,true), |
| 78 | HOWTO(R_SPARC_HI22, 10,2,22,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_HI22", false,0,0x003fffff,true), |
| 79 | HOWTO(R_SPARC_22, 0,2,22,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_22", false,0,0x003fffff,true), |
| 80 | HOWTO(R_SPARC_13, 0,2,13,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_13", false,0,0x00001fff,true), |
| 81 | HOWTO(R_SPARC_LO10, 0,2,10,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_LO10", false,0,0x000003ff,true), |
| 82 | HOWTO(R_SPARC_GOT10, 0,2,10,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_GOT10", false,0,0x000003ff,true), |
| 83 | HOWTO(R_SPARC_GOT13, 0,2,13,false,0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_GOT13", false,0,0x00001fff,true), |
| 84 | HOWTO(R_SPARC_GOT22, 10,2,22,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_GOT22", false,0,0x003fffff,true), |
| 85 | HOWTO(R_SPARC_PC10, 0,2,10,true, 0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_PC10", false,0,0x000003ff,true), |
| 86 | HOWTO(R_SPARC_PC22, 10,2,22,true, 0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_PC22", false,0,0x003fffff,true), |
| 87 | HOWTO(R_SPARC_WPLT30, 2,2,30,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_WPLT30", false,0,0x3fffffff,true), |
| 88 | HOWTO(R_SPARC_COPY, 0,0,00,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_COPY", false,0,0x00000000,true), |
| 89 | 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), |
| 90 | 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), |
| 91 | HOWTO(R_SPARC_RELATIVE, 0,0,00,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_RELATIVE",false,0,0x00000000,true), |
| 92 | HOWTO(R_SPARC_UA32, 0,0,00,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_UA32", false,0,0x00000000,true), |
| 93 | HOWTO(R_SPARC_PLT32, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_PLT32", false,0,0x00000000,true), |
| 94 | HOWTO(R_SPARC_HIPLT22, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_HIPLT22", false,0,0x00000000,true), |
| 95 | HOWTO(R_SPARC_LOPLT10, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_LOPLT10", false,0,0x00000000,true), |
| 96 | HOWTO(R_SPARC_PCPLT32, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_PCPLT32", false,0,0x00000000,true), |
| 97 | HOWTO(R_SPARC_PCPLT22, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_PCPLT22", false,0,0x00000000,true), |
| 98 | HOWTO(R_SPARC_PCPLT10, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_PCPLT10", false,0,0x00000000,true), |
| 99 | HOWTO(R_SPARC_10, 0,2,10,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_10", false,0,0x000003ff,true), |
| 100 | HOWTO(R_SPARC_11, 0,2,11,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_11", false,0,0x000007ff,true), |
| 101 | /* ??? If we need to handle R_SPARC_64 then we need (figuratively) |
| 102 | --enable-64-bit-bfd. That causes objdump to print address as 64 bits |
| 103 | which we really don't want on an elf32-sparc system. There may be other |
| 104 | consequences which we may not want (at least not until it's proven they're |
| 105 | necessary) so for now these are only enabled ifdef BFD64. */ |
| 106 | #ifdef BFD64 |
| 107 | HOWTO(R_SPARC_64, 0,4,00,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_64", false,0,~ (bfd_vma) 0, true), |
| 108 | /* ??? These don't make sense except in 64 bit systems so they're disabled |
| 109 | ifndef BFD64 too (for now). */ |
| 110 | HOWTO(R_SPARC_OLO10, 0,2,10,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_OLO10", false,0,0x000003ff,true), |
| 111 | HOWTO(R_SPARC_HH22, 42,2,22,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_HH22", false,0,0x003fffff,true), |
| 112 | HOWTO(R_SPARC_HM10, 32,2,10,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_HM10", false,0,0x000003ff,true), |
| 113 | HOWTO(R_SPARC_LM22, 10,2,22,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_LM22", false,0,0x003fffff,true), |
| 114 | HOWTO(R_SPARC_PC_HH22, 42,2,22,true, 0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_HH22", false,0,0x003fffff,true), |
| 115 | HOWTO(R_SPARC_PC_HM10, 32,2,10,true, 0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_HM10", false,0,0x000003ff,true), |
| 116 | HOWTO(R_SPARC_PC_LM22, 10,2,22,true, 0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_LM22", false,0,0x003fffff,true), |
| 117 | #else |
| 118 | HOWTO(R_SPARC_64, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_64", false,0,0x00000000,true), |
| 119 | HOWTO(R_SPARC_OLO10, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_OLO10", false,0,0x00000000,true), |
| 120 | HOWTO(R_SPARC_HH22, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_HH22", false,0,0x00000000,true), |
| 121 | HOWTO(R_SPARC_HM10, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_HM10", false,0,0x00000000,true), |
| 122 | HOWTO(R_SPARC_LM22, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_LM22", false,0,0x00000000,true), |
| 123 | HOWTO(R_SPARC_PC_HH22, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_PC_HH22", false,0,0x00000000,true), |
| 124 | HOWTO(R_SPARC_PC_HM10, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_PC_HM10", false,0,0x00000000,true), |
| 125 | HOWTO(R_SPARC_PC_LM22, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_PC_LM22", false,0,0x00000000,true), |
| 126 | #endif |
| 127 | HOWTO(R_SPARC_WDISP16, 2,2,16,true, 0,complain_overflow_signed, sparc_elf_wdisp16_reloc,"R_SPARC_WDISP16", false,0,0x00000000,true), |
| 128 | HOWTO(R_SPARC_WDISP19, 2,2,22,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_WDISP19", false,0,0x0007ffff,true), |
| 129 | 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), |
| 130 | HOWTO(R_SPARC_7, 0,2, 7,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_7", false,0,0x0000007f,true), |
| 131 | HOWTO(R_SPARC_5, 0,2, 5,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_5", false,0,0x0000001f,true), |
| 132 | HOWTO(R_SPARC_6, 0,2, 6,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_6", false,0,0x0000003f,true), |
| 133 | }; |
| 134 | |
| 135 | struct elf_reloc_map { |
| 136 | unsigned char bfd_reloc_val; |
| 137 | unsigned char elf_reloc_val; |
| 138 | }; |
| 139 | |
| 140 | static CONST struct elf_reloc_map sparc_reloc_map[] = |
| 141 | { |
| 142 | { BFD_RELOC_NONE, R_SPARC_NONE, }, |
| 143 | { BFD_RELOC_16, R_SPARC_16, }, |
| 144 | { BFD_RELOC_8, R_SPARC_8 }, |
| 145 | { BFD_RELOC_8_PCREL, R_SPARC_DISP8 }, |
| 146 | /* ??? This might cause us to need separate functions in elf{32,64}-sparc.c |
| 147 | (we could still have just one table), but is this reloc ever used? */ |
| 148 | { BFD_RELOC_CTOR, R_SPARC_32 }, /* @@ Assumes 32 bits. */ |
| 149 | { BFD_RELOC_32, R_SPARC_32 }, |
| 150 | { BFD_RELOC_32_PCREL, R_SPARC_DISP32 }, |
| 151 | { BFD_RELOC_HI22, R_SPARC_HI22 }, |
| 152 | { BFD_RELOC_LO10, R_SPARC_LO10, }, |
| 153 | { BFD_RELOC_32_PCREL_S2, R_SPARC_WDISP30 }, |
| 154 | { BFD_RELOC_SPARC22, R_SPARC_22 }, |
| 155 | { BFD_RELOC_SPARC13, R_SPARC_13 }, |
| 156 | { BFD_RELOC_SPARC_GOT10, R_SPARC_GOT10 }, |
| 157 | { BFD_RELOC_SPARC_GOT13, R_SPARC_GOT13 }, |
| 158 | { BFD_RELOC_SPARC_GOT22, R_SPARC_GOT22 }, |
| 159 | { BFD_RELOC_SPARC_PC10, R_SPARC_PC10 }, |
| 160 | { BFD_RELOC_SPARC_PC22, R_SPARC_PC22 }, |
| 161 | { BFD_RELOC_SPARC_WPLT30, R_SPARC_WPLT30 }, |
| 162 | { BFD_RELOC_SPARC_COPY, R_SPARC_COPY }, |
| 163 | { BFD_RELOC_SPARC_GLOB_DAT, R_SPARC_GLOB_DAT }, |
| 164 | { BFD_RELOC_SPARC_JMP_SLOT, R_SPARC_JMP_SLOT }, |
| 165 | { BFD_RELOC_SPARC_RELATIVE, R_SPARC_RELATIVE }, |
| 166 | { BFD_RELOC_SPARC_WDISP22, R_SPARC_WDISP22 }, |
| 167 | /* ??? Doesn't dwarf use this? */ |
| 168 | /*{ BFD_RELOC_SPARC_UA32, R_SPARC_UA32 }, not used?? */ |
| 169 | {BFD_RELOC_SPARC_10, R_SPARC_10}, |
| 170 | {BFD_RELOC_SPARC_11, R_SPARC_11}, |
| 171 | {BFD_RELOC_SPARC_64, R_SPARC_64}, |
| 172 | {BFD_RELOC_SPARC_OLO10, R_SPARC_OLO10}, |
| 173 | {BFD_RELOC_SPARC_HH22, R_SPARC_HH22}, |
| 174 | {BFD_RELOC_SPARC_HM10, R_SPARC_HM10}, |
| 175 | {BFD_RELOC_SPARC_LM22, R_SPARC_LM22}, |
| 176 | {BFD_RELOC_SPARC_PC_HH22, R_SPARC_PC_HH22}, |
| 177 | {BFD_RELOC_SPARC_PC_HM10, R_SPARC_PC_HM10}, |
| 178 | {BFD_RELOC_SPARC_PC_LM22, R_SPARC_PC_LM22}, |
| 179 | {BFD_RELOC_SPARC_WDISP16, R_SPARC_WDISP16}, |
| 180 | {BFD_RELOC_SPARC_WDISP19, R_SPARC_WDISP19}, |
| 181 | {BFD_RELOC_SPARC_7, R_SPARC_7}, |
| 182 | {BFD_RELOC_SPARC_5, R_SPARC_5}, |
| 183 | {BFD_RELOC_SPARC_6, R_SPARC_6}, |
| 184 | }; |
| 185 | |
| 186 | static reloc_howto_type * |
| 187 | elf32_sparc_reloc_type_lookup (abfd, code) |
| 188 | bfd *abfd; |
| 189 | bfd_reloc_code_real_type code; |
| 190 | { |
| 191 | unsigned int i; |
| 192 | for (i = 0; i < sizeof (sparc_reloc_map) / sizeof (struct elf_reloc_map); i++) |
| 193 | { |
| 194 | if (sparc_reloc_map[i].bfd_reloc_val == code) |
| 195 | return &_bfd_sparc_elf_howto_table[(int) sparc_reloc_map[i].elf_reloc_val]; |
| 196 | } |
| 197 | return 0; |
| 198 | } |
| 199 | |
| 200 | /* We need to use ELF32_R_TYPE so we have our own copy of this function, |
| 201 | and elf64-sparc.c has its own copy. */ |
| 202 | |
| 203 | static void |
| 204 | elf32_sparc_info_to_howto (abfd, cache_ptr, dst) |
| 205 | bfd *abfd; |
| 206 | arelent *cache_ptr; |
| 207 | Elf_Internal_Rela *dst; |
| 208 | { |
| 209 | BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_SPARC_max); |
| 210 | cache_ptr->howto = &_bfd_sparc_elf_howto_table[ELF32_R_TYPE(dst->r_info)]; |
| 211 | } |
| 212 | \f |
| 213 | /* For unsupported relocs. */ |
| 214 | |
| 215 | static bfd_reloc_status_type |
| 216 | sparc_elf_notsupported_reloc (abfd, |
| 217 | reloc_entry, |
| 218 | symbol, |
| 219 | data, |
| 220 | input_section, |
| 221 | output_bfd, |
| 222 | error_message) |
| 223 | bfd *abfd; |
| 224 | arelent *reloc_entry; |
| 225 | asymbol *symbol; |
| 226 | PTR data; |
| 227 | asection *input_section; |
| 228 | bfd *output_bfd; |
| 229 | char **error_message; |
| 230 | { |
| 231 | return bfd_reloc_notsupported; |
| 232 | } |
| 233 | |
| 234 | /* Handle the WDISP16 reloc. */ |
| 235 | |
| 236 | static bfd_reloc_status_type |
| 237 | sparc_elf_wdisp16_reloc (abfd, |
| 238 | reloc_entry, |
| 239 | symbol, |
| 240 | data, |
| 241 | input_section, |
| 242 | output_bfd, |
| 243 | error_message) |
| 244 | bfd *abfd; |
| 245 | arelent *reloc_entry; |
| 246 | asymbol *symbol; |
| 247 | PTR data; |
| 248 | asection *input_section; |
| 249 | bfd *output_bfd; |
| 250 | char **error_message; |
| 251 | { |
| 252 | bfd_vma relocation; |
| 253 | bfd_vma x; |
| 254 | |
| 255 | if (output_bfd != (bfd *) NULL |
| 256 | && (symbol->flags & BSF_SECTION_SYM) == 0 |
| 257 | && (! reloc_entry->howto->partial_inplace |
| 258 | || reloc_entry->addend == 0)) |
| 259 | { |
| 260 | reloc_entry->address += input_section->output_offset; |
| 261 | return bfd_reloc_ok; |
| 262 | } |
| 263 | |
| 264 | if (output_bfd != NULL) |
| 265 | return bfd_reloc_continue; |
| 266 | |
| 267 | if (reloc_entry->address > input_section->_cooked_size) |
| 268 | return bfd_reloc_outofrange; |
| 269 | |
| 270 | relocation = (symbol->value |
| 271 | + symbol->section->output_section->vma |
| 272 | + symbol->section->output_offset); |
| 273 | relocation += reloc_entry->addend; |
| 274 | relocation -= (input_section->output_section->vma |
| 275 | + input_section->output_offset); |
| 276 | relocation -= reloc_entry->address; |
| 277 | |
| 278 | x = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address); |
| 279 | x |= ((((relocation >> 2) & 0xc000) << 6) |
| 280 | | ((relocation >> 2) & 0x3fff)); |
| 281 | bfd_put_32 (abfd, x, (bfd_byte *) data + reloc_entry->address); |
| 282 | |
| 283 | if ((bfd_signed_vma) relocation < - 0x40000 |
| 284 | || (bfd_signed_vma) relocation > 0x3ffff) |
| 285 | return bfd_reloc_overflow; |
| 286 | else |
| 287 | return bfd_reloc_ok; |
| 288 | } |
| 289 | \f |
| 290 | /* Functions for the SPARC ELF linker. */ |
| 291 | |
| 292 | /* The name of the dynamic interpreter. This is put in the .interp |
| 293 | section. */ |
| 294 | |
| 295 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" |
| 296 | |
| 297 | /* The nop opcode we use. */ |
| 298 | |
| 299 | #define SPARC_NOP 0x01000000 |
| 300 | |
| 301 | /* The size in bytes of an entry in the procedure linkage table. */ |
| 302 | |
| 303 | #define PLT_ENTRY_SIZE 12 |
| 304 | |
| 305 | /* The first four entries in a procedure linkage table are reserved, |
| 306 | and the initial contents are unimportant (we zero them out). |
| 307 | Subsequent entries look like this. See the SVR4 ABI SPARC |
| 308 | supplement to see how this works. */ |
| 309 | |
| 310 | /* sethi %hi(.-.plt0),%g1. We fill in the address later. */ |
| 311 | #define PLT_ENTRY_WORD0 0x03000000 |
| 312 | /* b,a .plt0. We fill in the offset later. */ |
| 313 | #define PLT_ENTRY_WORD1 0x30800000 |
| 314 | /* nop. */ |
| 315 | #define PLT_ENTRY_WORD2 SPARC_NOP |
| 316 | |
| 317 | /* Look through the relocs for a section during the first phase, and |
| 318 | allocate space in the global offset table or procedure linkage |
| 319 | table. */ |
| 320 | |
| 321 | static boolean |
| 322 | elf32_sparc_check_relocs (abfd, info, sec, relocs) |
| 323 | bfd *abfd; |
| 324 | struct bfd_link_info *info; |
| 325 | asection *sec; |
| 326 | const Elf_Internal_Rela *relocs; |
| 327 | { |
| 328 | bfd *dynobj; |
| 329 | Elf_Internal_Shdr *symtab_hdr; |
| 330 | struct elf_link_hash_entry **sym_hashes; |
| 331 | bfd_vma *local_got_offsets; |
| 332 | const Elf_Internal_Rela *rel; |
| 333 | const Elf_Internal_Rela *rel_end; |
| 334 | asection *sgot; |
| 335 | asection *srelgot; |
| 336 | asection *sreloc; |
| 337 | |
| 338 | if (info->relocateable) |
| 339 | return true; |
| 340 | |
| 341 | dynobj = elf_hash_table (info)->dynobj; |
| 342 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 343 | sym_hashes = elf_sym_hashes (abfd); |
| 344 | local_got_offsets = elf_local_got_offsets (abfd); |
| 345 | |
| 346 | sgot = NULL; |
| 347 | srelgot = NULL; |
| 348 | sreloc = NULL; |
| 349 | |
| 350 | rel_end = relocs + sec->reloc_count; |
| 351 | for (rel = relocs; rel < rel_end; rel++) |
| 352 | { |
| 353 | unsigned long r_symndx; |
| 354 | struct elf_link_hash_entry *h; |
| 355 | |
| 356 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 357 | if (r_symndx < symtab_hdr->sh_info) |
| 358 | h = NULL; |
| 359 | else |
| 360 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 361 | |
| 362 | switch (ELF32_R_TYPE (rel->r_info)) |
| 363 | { |
| 364 | case R_SPARC_GOT10: |
| 365 | case R_SPARC_GOT13: |
| 366 | case R_SPARC_GOT22: |
| 367 | /* This symbol requires a global offset table entry. */ |
| 368 | |
| 369 | if (dynobj == NULL) |
| 370 | { |
| 371 | /* Create the .got section. */ |
| 372 | elf_hash_table (info)->dynobj = dynobj = abfd; |
| 373 | if (! _bfd_elf_create_got_section (dynobj, info)) |
| 374 | return false; |
| 375 | } |
| 376 | |
| 377 | if (sgot == NULL) |
| 378 | { |
| 379 | sgot = bfd_get_section_by_name (dynobj, ".got"); |
| 380 | BFD_ASSERT (sgot != NULL); |
| 381 | } |
| 382 | |
| 383 | if (srelgot == NULL |
| 384 | && (h != NULL || info->shared)) |
| 385 | { |
| 386 | srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); |
| 387 | if (srelgot == NULL) |
| 388 | { |
| 389 | srelgot = bfd_make_section (dynobj, ".rela.got"); |
| 390 | if (srelgot == NULL |
| 391 | || ! bfd_set_section_flags (dynobj, srelgot, |
| 392 | (SEC_ALLOC |
| 393 | | SEC_LOAD |
| 394 | | SEC_HAS_CONTENTS |
| 395 | | SEC_IN_MEMORY |
| 396 | | SEC_LINKER_CREATED |
| 397 | | SEC_READONLY)) |
| 398 | || ! bfd_set_section_alignment (dynobj, srelgot, 2)) |
| 399 | return false; |
| 400 | } |
| 401 | } |
| 402 | |
| 403 | if (h != NULL) |
| 404 | { |
| 405 | if (h->got_offset != (bfd_vma) -1) |
| 406 | { |
| 407 | /* We have already allocated space in the .got. */ |
| 408 | break; |
| 409 | } |
| 410 | h->got_offset = sgot->_raw_size; |
| 411 | |
| 412 | /* Make sure this symbol is output as a dynamic symbol. */ |
| 413 | if (h->dynindx == -1) |
| 414 | { |
| 415 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) |
| 416 | return false; |
| 417 | } |
| 418 | |
| 419 | srelgot->_raw_size += sizeof (Elf32_External_Rela); |
| 420 | } |
| 421 | else |
| 422 | { |
| 423 | /* This is a global offset table entry for a local |
| 424 | symbol. */ |
| 425 | if (local_got_offsets == NULL) |
| 426 | { |
| 427 | size_t size; |
| 428 | register unsigned int i; |
| 429 | |
| 430 | size = symtab_hdr->sh_info * sizeof (bfd_vma); |
| 431 | local_got_offsets = (bfd_vma *) bfd_alloc (abfd, size); |
| 432 | if (local_got_offsets == NULL) |
| 433 | return false; |
| 434 | elf_local_got_offsets (abfd) = local_got_offsets; |
| 435 | for (i = 0; i < symtab_hdr->sh_info; i++) |
| 436 | local_got_offsets[i] = (bfd_vma) -1; |
| 437 | } |
| 438 | if (local_got_offsets[r_symndx] != (bfd_vma) -1) |
| 439 | { |
| 440 | /* We have already allocated space in the .got. */ |
| 441 | break; |
| 442 | } |
| 443 | local_got_offsets[r_symndx] = sgot->_raw_size; |
| 444 | |
| 445 | if (info->shared) |
| 446 | { |
| 447 | /* If we are generating a shared object, we need to |
| 448 | output a R_SPARC_RELATIVE reloc so that the |
| 449 | dynamic linker can adjust this GOT entry. */ |
| 450 | srelgot->_raw_size += sizeof (Elf32_External_Rela); |
| 451 | } |
| 452 | } |
| 453 | |
| 454 | sgot->_raw_size += 4; |
| 455 | |
| 456 | /* If the .got section is more than 0x1000 bytes, we add |
| 457 | 0x1000 to the value of _GLOBAL_OFFSET_TABLE_, so that 13 |
| 458 | bit relocations have a greater chance of working. */ |
| 459 | if (sgot->_raw_size >= 0x1000 |
| 460 | && elf_hash_table (info)->hgot->root.u.def.value == 0) |
| 461 | elf_hash_table (info)->hgot->root.u.def.value = 0x1000; |
| 462 | |
| 463 | break; |
| 464 | |
| 465 | case R_SPARC_WPLT30: |
| 466 | /* This symbol requires a procedure linkage table entry. We |
| 467 | actually build the entry in adjust_dynamic_symbol, |
| 468 | because this might be a case of linking PIC code without |
| 469 | linking in any dynamic objects, in which case we don't |
| 470 | need to generate a procedure linkage table after all. */ |
| 471 | |
| 472 | if (h == NULL) |
| 473 | { |
| 474 | /* It does not make sense to have a procedure linkage |
| 475 | table entry for a local symbol. */ |
| 476 | bfd_set_error (bfd_error_bad_value); |
| 477 | return false; |
| 478 | } |
| 479 | |
| 480 | /* Make sure this symbol is output as a dynamic symbol. */ |
| 481 | if (h->dynindx == -1) |
| 482 | { |
| 483 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) |
| 484 | return false; |
| 485 | } |
| 486 | |
| 487 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; |
| 488 | |
| 489 | break; |
| 490 | |
| 491 | case R_SPARC_PC10: |
| 492 | case R_SPARC_PC22: |
| 493 | if (h != NULL |
| 494 | && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) |
| 495 | break; |
| 496 | /* Fall through. */ |
| 497 | case R_SPARC_DISP8: |
| 498 | case R_SPARC_DISP16: |
| 499 | case R_SPARC_DISP32: |
| 500 | case R_SPARC_WDISP30: |
| 501 | case R_SPARC_WDISP22: |
| 502 | case R_SPARC_WDISP19: |
| 503 | case R_SPARC_WDISP16: |
| 504 | if (h == NULL) |
| 505 | break; |
| 506 | /* Fall through. */ |
| 507 | case R_SPARC_8: |
| 508 | case R_SPARC_16: |
| 509 | case R_SPARC_32: |
| 510 | case R_SPARC_HI22: |
| 511 | case R_SPARC_22: |
| 512 | case R_SPARC_13: |
| 513 | case R_SPARC_LO10: |
| 514 | case R_SPARC_UA32: |
| 515 | if (info->shared) |
| 516 | { |
| 517 | /* When creating a shared object, we must copy these |
| 518 | relocs into the output file. We create a reloc |
| 519 | section in dynobj and make room for the reloc. */ |
| 520 | if (sreloc == NULL) |
| 521 | { |
| 522 | const char *name; |
| 523 | |
| 524 | name = (bfd_elf_string_from_elf_section |
| 525 | (abfd, |
| 526 | elf_elfheader (abfd)->e_shstrndx, |
| 527 | elf_section_data (sec)->rel_hdr.sh_name)); |
| 528 | if (name == NULL) |
| 529 | return false; |
| 530 | |
| 531 | BFD_ASSERT (strncmp (name, ".rela", 5) == 0 |
| 532 | && strcmp (bfd_get_section_name (abfd, sec), |
| 533 | name + 5) == 0); |
| 534 | |
| 535 | sreloc = bfd_get_section_by_name (dynobj, name); |
| 536 | if (sreloc == NULL) |
| 537 | { |
| 538 | flagword flags; |
| 539 | |
| 540 | sreloc = bfd_make_section (dynobj, name); |
| 541 | flags = (SEC_HAS_CONTENTS | SEC_READONLY |
| 542 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); |
| 543 | if ((sec->flags & SEC_ALLOC) != 0) |
| 544 | flags |= SEC_ALLOC | SEC_LOAD; |
| 545 | if (sreloc == NULL |
| 546 | || ! bfd_set_section_flags (dynobj, sreloc, flags) |
| 547 | || ! bfd_set_section_alignment (dynobj, sreloc, 2)) |
| 548 | return false; |
| 549 | } |
| 550 | } |
| 551 | |
| 552 | sreloc->_raw_size += sizeof (Elf32_External_Rela); |
| 553 | } |
| 554 | |
| 555 | break; |
| 556 | |
| 557 | default: |
| 558 | break; |
| 559 | } |
| 560 | } |
| 561 | |
| 562 | return true; |
| 563 | } |
| 564 | |
| 565 | /* Adjust a symbol defined by a dynamic object and referenced by a |
| 566 | regular object. The current definition is in some section of the |
| 567 | dynamic object, but we're not including those sections. We have to |
| 568 | change the definition to something the rest of the link can |
| 569 | understand. */ |
| 570 | |
| 571 | static boolean |
| 572 | elf32_sparc_adjust_dynamic_symbol (info, h) |
| 573 | struct bfd_link_info *info; |
| 574 | struct elf_link_hash_entry *h; |
| 575 | { |
| 576 | bfd *dynobj; |
| 577 | asection *s; |
| 578 | unsigned int power_of_two; |
| 579 | |
| 580 | dynobj = elf_hash_table (info)->dynobj; |
| 581 | |
| 582 | /* Make sure we know what is going on here. */ |
| 583 | BFD_ASSERT (dynobj != NULL |
| 584 | && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) |
| 585 | || h->weakdef != NULL |
| 586 | || ((h->elf_link_hash_flags |
| 587 | & ELF_LINK_HASH_DEF_DYNAMIC) != 0 |
| 588 | && (h->elf_link_hash_flags |
| 589 | & ELF_LINK_HASH_REF_REGULAR) != 0 |
| 590 | && (h->elf_link_hash_flags |
| 591 | & ELF_LINK_HASH_DEF_REGULAR) == 0))); |
| 592 | |
| 593 | /* If this is a function, put it in the procedure linkage table. We |
| 594 | will fill in the contents of the procedure linkage table later |
| 595 | (although we could actually do it here). The STT_NOTYPE |
| 596 | condition is a hack specifically for the Oracle libraries |
| 597 | delivered for Solaris; for some inexplicable reason, they define |
| 598 | some of their functions as STT_NOTYPE when they really should be |
| 599 | STT_FUNC. */ |
| 600 | if (h->type == STT_FUNC |
| 601 | || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0 |
| 602 | || (h->type == STT_NOTYPE |
| 603 | && (h->root.type == bfd_link_hash_defined |
| 604 | || h->root.type == bfd_link_hash_defweak) |
| 605 | && (h->root.u.def.section->flags & SEC_CODE) != 0)) |
| 606 | { |
| 607 | if (! elf_hash_table (info)->dynamic_sections_created) |
| 608 | { |
| 609 | /* This case can occur if we saw a WPLT30 reloc in an input |
| 610 | file, but none of the input files were dynamic objects. |
| 611 | In such a case, we don't actually need to build a |
| 612 | procedure linkage table, and we can just do a WDISP30 |
| 613 | reloc instead. */ |
| 614 | BFD_ASSERT ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0); |
| 615 | return true; |
| 616 | } |
| 617 | |
| 618 | s = bfd_get_section_by_name (dynobj, ".plt"); |
| 619 | BFD_ASSERT (s != NULL); |
| 620 | |
| 621 | /* The first four entries in .plt are reserved. */ |
| 622 | if (s->_raw_size == 0) |
| 623 | s->_raw_size = 4 * PLT_ENTRY_SIZE; |
| 624 | |
| 625 | /* The procedure linkage table has a maximum size. */ |
| 626 | if (s->_raw_size >= 0x400000) |
| 627 | { |
| 628 | bfd_set_error (bfd_error_bad_value); |
| 629 | return false; |
| 630 | } |
| 631 | |
| 632 | /* If this symbol is not defined in a regular file, and we are |
| 633 | not generating a shared library, then set the symbol to this |
| 634 | location in the .plt. This is required to make function |
| 635 | pointers compare as equal between the normal executable and |
| 636 | the shared library. */ |
| 637 | if (! info->shared |
| 638 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) |
| 639 | { |
| 640 | h->root.u.def.section = s; |
| 641 | h->root.u.def.value = s->_raw_size; |
| 642 | } |
| 643 | |
| 644 | h->plt_offset = s->_raw_size; |
| 645 | |
| 646 | /* Make room for this entry. */ |
| 647 | s->_raw_size += PLT_ENTRY_SIZE; |
| 648 | |
| 649 | /* We also need to make an entry in the .rela.plt section. */ |
| 650 | |
| 651 | s = bfd_get_section_by_name (dynobj, ".rela.plt"); |
| 652 | BFD_ASSERT (s != NULL); |
| 653 | s->_raw_size += sizeof (Elf32_External_Rela); |
| 654 | |
| 655 | return true; |
| 656 | } |
| 657 | |
| 658 | /* If this is a weak symbol, and there is a real definition, the |
| 659 | processor independent code will have arranged for us to see the |
| 660 | real definition first, and we can just use the same value. */ |
| 661 | if (h->weakdef != NULL) |
| 662 | { |
| 663 | BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined |
| 664 | || h->weakdef->root.type == bfd_link_hash_defweak); |
| 665 | h->root.u.def.section = h->weakdef->root.u.def.section; |
| 666 | h->root.u.def.value = h->weakdef->root.u.def.value; |
| 667 | return true; |
| 668 | } |
| 669 | |
| 670 | /* This is a reference to a symbol defined by a dynamic object which |
| 671 | is not a function. */ |
| 672 | |
| 673 | /* If we are creating a shared library, we must presume that the |
| 674 | only references to the symbol are via the global offset table. |
| 675 | For such cases we need not do anything here; the relocations will |
| 676 | be handled correctly by relocate_section. */ |
| 677 | if (info->shared) |
| 678 | return true; |
| 679 | |
| 680 | /* We must allocate the symbol in our .dynbss section, which will |
| 681 | become part of the .bss section of the executable. There will be |
| 682 | an entry for this symbol in the .dynsym section. The dynamic |
| 683 | object will contain position independent code, so all references |
| 684 | from the dynamic object to this symbol will go through the global |
| 685 | offset table. The dynamic linker will use the .dynsym entry to |
| 686 | determine the address it must put in the global offset table, so |
| 687 | both the dynamic object and the regular object will refer to the |
| 688 | same memory location for the variable. */ |
| 689 | |
| 690 | s = bfd_get_section_by_name (dynobj, ".dynbss"); |
| 691 | BFD_ASSERT (s != NULL); |
| 692 | |
| 693 | /* We must generate a R_SPARC_COPY reloc to tell the dynamic linker |
| 694 | to copy the initial value out of the dynamic object and into the |
| 695 | runtime process image. We need to remember the offset into the |
| 696 | .rel.bss section we are going to use. */ |
| 697 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) |
| 698 | { |
| 699 | asection *srel; |
| 700 | |
| 701 | srel = bfd_get_section_by_name (dynobj, ".rela.bss"); |
| 702 | BFD_ASSERT (srel != NULL); |
| 703 | srel->_raw_size += sizeof (Elf32_External_Rela); |
| 704 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY; |
| 705 | } |
| 706 | |
| 707 | /* We need to figure out the alignment required for this symbol. I |
| 708 | have no idea how ELF linkers handle this. */ |
| 709 | power_of_two = bfd_log2 (h->size); |
| 710 | if (power_of_two > 3) |
| 711 | power_of_two = 3; |
| 712 | |
| 713 | /* Apply the required alignment. */ |
| 714 | s->_raw_size = BFD_ALIGN (s->_raw_size, |
| 715 | (bfd_size_type) (1 << power_of_two)); |
| 716 | if (power_of_two > bfd_get_section_alignment (dynobj, s)) |
| 717 | { |
| 718 | if (! bfd_set_section_alignment (dynobj, s, power_of_two)) |
| 719 | return false; |
| 720 | } |
| 721 | |
| 722 | /* Define the symbol as being at this point in the section. */ |
| 723 | h->root.u.def.section = s; |
| 724 | h->root.u.def.value = s->_raw_size; |
| 725 | |
| 726 | /* Increment the section size to make room for the symbol. */ |
| 727 | s->_raw_size += h->size; |
| 728 | |
| 729 | return true; |
| 730 | } |
| 731 | |
| 732 | /* Set the sizes of the dynamic sections. */ |
| 733 | |
| 734 | static boolean |
| 735 | elf32_sparc_size_dynamic_sections (output_bfd, info) |
| 736 | bfd *output_bfd; |
| 737 | struct bfd_link_info *info; |
| 738 | { |
| 739 | bfd *dynobj; |
| 740 | asection *s; |
| 741 | boolean reltext; |
| 742 | boolean relplt; |
| 743 | |
| 744 | dynobj = elf_hash_table (info)->dynobj; |
| 745 | BFD_ASSERT (dynobj != NULL); |
| 746 | |
| 747 | if (elf_hash_table (info)->dynamic_sections_created) |
| 748 | { |
| 749 | /* Set the contents of the .interp section to the interpreter. */ |
| 750 | if (! info->shared) |
| 751 | { |
| 752 | s = bfd_get_section_by_name (dynobj, ".interp"); |
| 753 | BFD_ASSERT (s != NULL); |
| 754 | s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER; |
| 755 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
| 756 | } |
| 757 | |
| 758 | /* Make space for the trailing nop in .plt. */ |
| 759 | s = bfd_get_section_by_name (dynobj, ".plt"); |
| 760 | BFD_ASSERT (s != NULL); |
| 761 | if (s->_raw_size > 0) |
| 762 | s->_raw_size += 4; |
| 763 | } |
| 764 | else |
| 765 | { |
| 766 | /* We may have created entries in the .rela.got section. |
| 767 | However, if we are not creating the dynamic sections, we will |
| 768 | not actually use these entries. Reset the size of .rela.got, |
| 769 | which will cause it to get stripped from the output file |
| 770 | below. */ |
| 771 | s = bfd_get_section_by_name (dynobj, ".rela.got"); |
| 772 | if (s != NULL) |
| 773 | s->_raw_size = 0; |
| 774 | } |
| 775 | |
| 776 | /* The check_relocs and adjust_dynamic_symbol entry points have |
| 777 | determined the sizes of the various dynamic sections. Allocate |
| 778 | memory for them. */ |
| 779 | reltext = false; |
| 780 | relplt = false; |
| 781 | for (s = dynobj->sections; s != NULL; s = s->next) |
| 782 | { |
| 783 | const char *name; |
| 784 | boolean strip; |
| 785 | |
| 786 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
| 787 | continue; |
| 788 | |
| 789 | /* It's OK to base decisions on the section name, because none |
| 790 | of the dynobj section names depend upon the input files. */ |
| 791 | name = bfd_get_section_name (dynobj, s); |
| 792 | |
| 793 | strip = false; |
| 794 | |
| 795 | if (strncmp (name, ".rela", 5) == 0) |
| 796 | { |
| 797 | if (s->_raw_size == 0) |
| 798 | { |
| 799 | /* If we don't need this section, strip it from the |
| 800 | output file. This is to handle .rela.bss and |
| 801 | .rel.plt. We must create it in |
| 802 | create_dynamic_sections, because it must be created |
| 803 | before the linker maps input sections to output |
| 804 | sections. The linker does that before |
| 805 | adjust_dynamic_symbol is called, and it is that |
| 806 | function which decides whether anything needs to go |
| 807 | into these sections. */ |
| 808 | strip = true; |
| 809 | } |
| 810 | else |
| 811 | { |
| 812 | const char *outname; |
| 813 | asection *target; |
| 814 | |
| 815 | /* If this relocation section applies to a read only |
| 816 | section, then we probably need a DT_TEXTREL entry. */ |
| 817 | outname = bfd_get_section_name (output_bfd, |
| 818 | s->output_section); |
| 819 | target = bfd_get_section_by_name (output_bfd, outname + 5); |
| 820 | if (target != NULL |
| 821 | && (target->flags & SEC_READONLY) != 0 |
| 822 | && (target->flags & SEC_ALLOC) != 0) |
| 823 | reltext = true; |
| 824 | |
| 825 | if (strcmp (name, ".rela.plt") == 0) |
| 826 | relplt = true; |
| 827 | |
| 828 | /* We use the reloc_count field as a counter if we need |
| 829 | to copy relocs into the output file. */ |
| 830 | s->reloc_count = 0; |
| 831 | } |
| 832 | } |
| 833 | else if (strcmp (name, ".plt") != 0 |
| 834 | && strcmp (name, ".got") != 0) |
| 835 | { |
| 836 | /* It's not one of our sections, so don't allocate space. */ |
| 837 | continue; |
| 838 | } |
| 839 | |
| 840 | if (strip) |
| 841 | { |
| 842 | asection **spp; |
| 843 | |
| 844 | for (spp = &s->output_section->owner->sections; |
| 845 | *spp != s->output_section; |
| 846 | spp = &(*spp)->next) |
| 847 | ; |
| 848 | *spp = s->output_section->next; |
| 849 | --s->output_section->owner->section_count; |
| 850 | |
| 851 | continue; |
| 852 | } |
| 853 | |
| 854 | /* Allocate memory for the section contents. */ |
| 855 | s->contents = (bfd_byte *) bfd_alloc (dynobj, s->_raw_size); |
| 856 | if (s->contents == NULL && s->_raw_size != 0) |
| 857 | return false; |
| 858 | } |
| 859 | |
| 860 | if (elf_hash_table (info)->dynamic_sections_created) |
| 861 | { |
| 862 | /* Add some entries to the .dynamic section. We fill in the |
| 863 | values later, in elf32_sparc_finish_dynamic_sections, but we |
| 864 | must add the entries now so that we get the correct size for |
| 865 | the .dynamic section. The DT_DEBUG entry is filled in by the |
| 866 | dynamic linker and used by the debugger. */ |
| 867 | if (! info->shared) |
| 868 | { |
| 869 | if (! bfd_elf32_add_dynamic_entry (info, DT_DEBUG, 0)) |
| 870 | return false; |
| 871 | } |
| 872 | |
| 873 | if (relplt) |
| 874 | { |
| 875 | if (! bfd_elf32_add_dynamic_entry (info, DT_PLTGOT, 0) |
| 876 | || ! bfd_elf32_add_dynamic_entry (info, DT_PLTRELSZ, 0) |
| 877 | || ! bfd_elf32_add_dynamic_entry (info, DT_PLTREL, DT_RELA) |
| 878 | || ! bfd_elf32_add_dynamic_entry (info, DT_JMPREL, 0)) |
| 879 | return false; |
| 880 | } |
| 881 | |
| 882 | if (! bfd_elf32_add_dynamic_entry (info, DT_RELA, 0) |
| 883 | || ! bfd_elf32_add_dynamic_entry (info, DT_RELASZ, 0) |
| 884 | || ! bfd_elf32_add_dynamic_entry (info, DT_RELAENT, |
| 885 | sizeof (Elf32_External_Rela))) |
| 886 | return false; |
| 887 | |
| 888 | if (reltext) |
| 889 | { |
| 890 | if (! bfd_elf32_add_dynamic_entry (info, DT_TEXTREL, 0)) |
| 891 | return false; |
| 892 | } |
| 893 | } |
| 894 | |
| 895 | /* If we are generating a shared library, we generate a section |
| 896 | symbol for each output section for which we might need to copy |
| 897 | relocs. These are local symbols, which means that they must come |
| 898 | first in the dynamic symbol table. That means we must increment |
| 899 | the dynamic symbol index of every other dynamic symbol. */ |
| 900 | if (info->shared) |
| 901 | { |
| 902 | int c; |
| 903 | |
| 904 | c = 0; |
| 905 | for (s = output_bfd->sections; s != NULL; s = s->next) |
| 906 | { |
| 907 | if ((s->flags & SEC_LINKER_CREATED) != 0 |
| 908 | || (s->flags & SEC_ALLOC) == 0) |
| 909 | continue; |
| 910 | |
| 911 | elf_section_data (s)->dynindx = c + 1; |
| 912 | |
| 913 | /* These symbols will have no names, so we don't need to |
| 914 | fiddle with dynstr_index. */ |
| 915 | |
| 916 | ++c; |
| 917 | } |
| 918 | |
| 919 | elf_link_hash_traverse (elf_hash_table (info), |
| 920 | elf32_sparc_adjust_dynindx, |
| 921 | (PTR) &c); |
| 922 | elf_hash_table (info)->dynsymcount += c; |
| 923 | } |
| 924 | |
| 925 | return true; |
| 926 | } |
| 927 | |
| 928 | /* Increment the index of a dynamic symbol by a given amount. Called |
| 929 | via elf_link_hash_traverse. */ |
| 930 | |
| 931 | static boolean |
| 932 | elf32_sparc_adjust_dynindx (h, cparg) |
| 933 | struct elf_link_hash_entry *h; |
| 934 | PTR cparg; |
| 935 | { |
| 936 | int *cp = (int *) cparg; |
| 937 | |
| 938 | if (h->dynindx != -1) |
| 939 | h->dynindx += *cp; |
| 940 | return true; |
| 941 | } |
| 942 | |
| 943 | /* Relocate a SPARC ELF section. */ |
| 944 | |
| 945 | static boolean |
| 946 | elf32_sparc_relocate_section (output_bfd, info, input_bfd, input_section, |
| 947 | contents, relocs, local_syms, local_sections) |
| 948 | bfd *output_bfd; |
| 949 | struct bfd_link_info *info; |
| 950 | bfd *input_bfd; |
| 951 | asection *input_section; |
| 952 | bfd_byte *contents; |
| 953 | Elf_Internal_Rela *relocs; |
| 954 | Elf_Internal_Sym *local_syms; |
| 955 | asection **local_sections; |
| 956 | { |
| 957 | bfd *dynobj; |
| 958 | Elf_Internal_Shdr *symtab_hdr; |
| 959 | struct elf_link_hash_entry **sym_hashes; |
| 960 | bfd_vma *local_got_offsets; |
| 961 | bfd_vma got_base; |
| 962 | asection *sgot; |
| 963 | asection *splt; |
| 964 | asection *sreloc; |
| 965 | Elf_Internal_Rela *rel; |
| 966 | Elf_Internal_Rela *relend; |
| 967 | |
| 968 | dynobj = elf_hash_table (info)->dynobj; |
| 969 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| 970 | sym_hashes = elf_sym_hashes (input_bfd); |
| 971 | local_got_offsets = elf_local_got_offsets (input_bfd); |
| 972 | |
| 973 | if (elf_hash_table (info)->hgot == NULL) |
| 974 | got_base = 0; |
| 975 | else |
| 976 | got_base = elf_hash_table (info)->hgot->root.u.def.value; |
| 977 | |
| 978 | sgot = NULL; |
| 979 | splt = NULL; |
| 980 | sreloc = NULL; |
| 981 | |
| 982 | rel = relocs; |
| 983 | relend = relocs + input_section->reloc_count; |
| 984 | for (; rel < relend; rel++) |
| 985 | { |
| 986 | int r_type; |
| 987 | reloc_howto_type *howto; |
| 988 | unsigned long r_symndx; |
| 989 | struct elf_link_hash_entry *h; |
| 990 | Elf_Internal_Sym *sym; |
| 991 | asection *sec; |
| 992 | bfd_vma relocation; |
| 993 | bfd_reloc_status_type r; |
| 994 | |
| 995 | r_type = ELF32_R_TYPE (rel->r_info); |
| 996 | if (r_type < 0 || r_type >= (int) R_SPARC_max) |
| 997 | { |
| 998 | bfd_set_error (bfd_error_bad_value); |
| 999 | return false; |
| 1000 | } |
| 1001 | howto = _bfd_sparc_elf_howto_table + r_type; |
| 1002 | |
| 1003 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 1004 | |
| 1005 | if (info->relocateable) |
| 1006 | { |
| 1007 | /* This is a relocateable link. We don't have to change |
| 1008 | anything, unless the reloc is against a section symbol, |
| 1009 | in which case we have to adjust according to where the |
| 1010 | section symbol winds up in the output section. */ |
| 1011 | if (r_symndx < symtab_hdr->sh_info) |
| 1012 | { |
| 1013 | sym = local_syms + r_symndx; |
| 1014 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) |
| 1015 | { |
| 1016 | sec = local_sections[r_symndx]; |
| 1017 | rel->r_addend += sec->output_offset + sym->st_value; |
| 1018 | } |
| 1019 | } |
| 1020 | |
| 1021 | continue; |
| 1022 | } |
| 1023 | |
| 1024 | /* This is a final link. */ |
| 1025 | h = NULL; |
| 1026 | sym = NULL; |
| 1027 | sec = NULL; |
| 1028 | if (r_symndx < symtab_hdr->sh_info) |
| 1029 | { |
| 1030 | sym = local_syms + r_symndx; |
| 1031 | sec = local_sections[r_symndx]; |
| 1032 | relocation = (sec->output_section->vma |
| 1033 | + sec->output_offset |
| 1034 | + sym->st_value); |
| 1035 | } |
| 1036 | else |
| 1037 | { |
| 1038 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 1039 | while (h->root.type == bfd_link_hash_indirect |
| 1040 | || h->root.type == bfd_link_hash_warning) |
| 1041 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 1042 | if (h->root.type == bfd_link_hash_defined |
| 1043 | || h->root.type == bfd_link_hash_defweak) |
| 1044 | { |
| 1045 | sec = h->root.u.def.section; |
| 1046 | if ((r_type == R_SPARC_WPLT30 |
| 1047 | && h->plt_offset != (bfd_vma) -1) |
| 1048 | || ((r_type == R_SPARC_GOT10 |
| 1049 | || r_type == R_SPARC_GOT13 |
| 1050 | || r_type == R_SPARC_GOT22) |
| 1051 | && elf_hash_table (info)->dynamic_sections_created |
| 1052 | && (! info->shared |
| 1053 | || (! info->symbolic && h->dynindx != -1) |
| 1054 | || (h->elf_link_hash_flags |
| 1055 | & ELF_LINK_HASH_DEF_REGULAR) == 0)) |
| 1056 | || (info->shared |
| 1057 | && ((! info->symbolic && h->dynindx != -1) |
| 1058 | || (h->elf_link_hash_flags |
| 1059 | & ELF_LINK_HASH_DEF_REGULAR) == 0) |
| 1060 | && (r_type == R_SPARC_8 |
| 1061 | || r_type == R_SPARC_16 |
| 1062 | || r_type == R_SPARC_32 |
| 1063 | || r_type == R_SPARC_DISP8 |
| 1064 | || r_type == R_SPARC_DISP16 |
| 1065 | || r_type == R_SPARC_DISP32 |
| 1066 | || r_type == R_SPARC_WDISP30 |
| 1067 | || r_type == R_SPARC_WDISP22 |
| 1068 | || r_type == R_SPARC_WDISP19 |
| 1069 | || r_type == R_SPARC_WDISP16 |
| 1070 | || r_type == R_SPARC_HI22 |
| 1071 | || r_type == R_SPARC_22 |
| 1072 | || r_type == R_SPARC_13 |
| 1073 | || r_type == R_SPARC_LO10 |
| 1074 | || r_type == R_SPARC_UA32 |
| 1075 | || ((r_type == R_SPARC_PC10 |
| 1076 | || r_type == R_SPARC_PC22) |
| 1077 | && strcmp (h->root.root.string, |
| 1078 | "_GLOBAL_OFFSET_TABLE_") != 0)))) |
| 1079 | { |
| 1080 | /* In these cases, we don't need the relocation |
| 1081 | value. We check specially because in some |
| 1082 | obscure cases sec->output_section will be NULL. */ |
| 1083 | relocation = 0; |
| 1084 | } |
| 1085 | else |
| 1086 | relocation = (h->root.u.def.value |
| 1087 | + sec->output_section->vma |
| 1088 | + sec->output_offset); |
| 1089 | } |
| 1090 | else if (h->root.type == bfd_link_hash_undefweak) |
| 1091 | relocation = 0; |
| 1092 | else if (info->shared && !info->symbolic) |
| 1093 | relocation = 0; |
| 1094 | else |
| 1095 | { |
| 1096 | if (! ((*info->callbacks->undefined_symbol) |
| 1097 | (info, h->root.root.string, input_bfd, |
| 1098 | input_section, rel->r_offset))) |
| 1099 | return false; |
| 1100 | relocation = 0; |
| 1101 | } |
| 1102 | } |
| 1103 | |
| 1104 | switch (r_type) |
| 1105 | { |
| 1106 | case R_SPARC_GOT10: |
| 1107 | case R_SPARC_GOT13: |
| 1108 | case R_SPARC_GOT22: |
| 1109 | /* Relocation is to the entry for this symbol in the global |
| 1110 | offset table. */ |
| 1111 | if (sgot == NULL) |
| 1112 | { |
| 1113 | sgot = bfd_get_section_by_name (dynobj, ".got"); |
| 1114 | BFD_ASSERT (sgot != NULL); |
| 1115 | } |
| 1116 | |
| 1117 | if (h != NULL) |
| 1118 | { |
| 1119 | bfd_vma off; |
| 1120 | |
| 1121 | off = h->got_offset; |
| 1122 | BFD_ASSERT (off != (bfd_vma) -1); |
| 1123 | |
| 1124 | if (! elf_hash_table (info)->dynamic_sections_created |
| 1125 | || (info->shared |
| 1126 | && (info->symbolic || h->dynindx == -1) |
| 1127 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))) |
| 1128 | { |
| 1129 | /* This is actually a static link, or it is a |
| 1130 | -Bsymbolic link and the symbol is defined |
| 1131 | locally, or the symbol was forced to be local |
| 1132 | because of a version file. We must initialize |
| 1133 | this entry in the global offset table. Since the |
| 1134 | offset must always be a multiple of 4, we use the |
| 1135 | least significant bit to record whether we have |
| 1136 | initialized it already. |
| 1137 | |
| 1138 | When doing a dynamic link, we create a .rela.got |
| 1139 | relocation entry to initialize the value. This |
| 1140 | is done in the finish_dynamic_symbol routine. */ |
| 1141 | if ((off & 1) != 0) |
| 1142 | off &= ~1; |
| 1143 | else |
| 1144 | { |
| 1145 | bfd_put_32 (output_bfd, relocation, |
| 1146 | sgot->contents + off); |
| 1147 | h->got_offset |= 1; |
| 1148 | } |
| 1149 | } |
| 1150 | |
| 1151 | relocation = sgot->output_offset + off - got_base; |
| 1152 | } |
| 1153 | else |
| 1154 | { |
| 1155 | bfd_vma off; |
| 1156 | |
| 1157 | BFD_ASSERT (local_got_offsets != NULL |
| 1158 | && local_got_offsets[r_symndx] != (bfd_vma) -1); |
| 1159 | |
| 1160 | off = local_got_offsets[r_symndx]; |
| 1161 | |
| 1162 | /* The offset must always be a multiple of 4. We use |
| 1163 | the least significant bit to record whether we have |
| 1164 | already processed this entry. */ |
| 1165 | if ((off & 1) != 0) |
| 1166 | off &= ~1; |
| 1167 | else |
| 1168 | { |
| 1169 | bfd_put_32 (output_bfd, relocation, sgot->contents + off); |
| 1170 | |
| 1171 | if (info->shared) |
| 1172 | { |
| 1173 | asection *srelgot; |
| 1174 | Elf_Internal_Rela outrel; |
| 1175 | |
| 1176 | /* We need to generate a R_SPARC_RELATIVE reloc |
| 1177 | for the dynamic linker. */ |
| 1178 | srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); |
| 1179 | BFD_ASSERT (srelgot != NULL); |
| 1180 | |
| 1181 | outrel.r_offset = (sgot->output_section->vma |
| 1182 | + sgot->output_offset |
| 1183 | + off); |
| 1184 | outrel.r_info = ELF32_R_INFO (0, R_SPARC_RELATIVE); |
| 1185 | outrel.r_addend = 0; |
| 1186 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, |
| 1187 | (((Elf32_External_Rela *) |
| 1188 | srelgot->contents) |
| 1189 | + srelgot->reloc_count)); |
| 1190 | ++srelgot->reloc_count; |
| 1191 | } |
| 1192 | |
| 1193 | local_got_offsets[r_symndx] |= 1; |
| 1194 | } |
| 1195 | |
| 1196 | relocation = sgot->output_offset + off - got_base; |
| 1197 | } |
| 1198 | |
| 1199 | break; |
| 1200 | |
| 1201 | case R_SPARC_WPLT30: |
| 1202 | /* Relocation is to the entry for this symbol in the |
| 1203 | procedure linkage table. */ |
| 1204 | BFD_ASSERT (h != NULL); |
| 1205 | |
| 1206 | if (h->plt_offset == (bfd_vma) -1) |
| 1207 | { |
| 1208 | /* We didn't make a PLT entry for this symbol. This |
| 1209 | happens when statically linking PIC code, or when |
| 1210 | using -Bsymbolic. */ |
| 1211 | break; |
| 1212 | } |
| 1213 | |
| 1214 | if (splt == NULL) |
| 1215 | { |
| 1216 | splt = bfd_get_section_by_name (dynobj, ".plt"); |
| 1217 | BFD_ASSERT (splt != NULL); |
| 1218 | } |
| 1219 | |
| 1220 | relocation = (splt->output_section->vma |
| 1221 | + splt->output_offset |
| 1222 | + h->plt_offset); |
| 1223 | break; |
| 1224 | |
| 1225 | case R_SPARC_PC10: |
| 1226 | case R_SPARC_PC22: |
| 1227 | if (h != NULL |
| 1228 | && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) |
| 1229 | break; |
| 1230 | /* Fall through. */ |
| 1231 | case R_SPARC_DISP8: |
| 1232 | case R_SPARC_DISP16: |
| 1233 | case R_SPARC_DISP32: |
| 1234 | case R_SPARC_WDISP30: |
| 1235 | case R_SPARC_WDISP22: |
| 1236 | case R_SPARC_WDISP19: |
| 1237 | case R_SPARC_WDISP16: |
| 1238 | if (h == NULL) |
| 1239 | break; |
| 1240 | /* Fall through. */ |
| 1241 | case R_SPARC_8: |
| 1242 | case R_SPARC_16: |
| 1243 | case R_SPARC_32: |
| 1244 | case R_SPARC_HI22: |
| 1245 | case R_SPARC_22: |
| 1246 | case R_SPARC_13: |
| 1247 | case R_SPARC_LO10: |
| 1248 | case R_SPARC_UA32: |
| 1249 | if (info->shared) |
| 1250 | { |
| 1251 | Elf_Internal_Rela outrel; |
| 1252 | boolean skip; |
| 1253 | |
| 1254 | /* When generating a shared object, these relocations |
| 1255 | are copied into the output file to be resolved at run |
| 1256 | time. */ |
| 1257 | |
| 1258 | if (sreloc == NULL) |
| 1259 | { |
| 1260 | const char *name; |
| 1261 | |
| 1262 | name = (bfd_elf_string_from_elf_section |
| 1263 | (input_bfd, |
| 1264 | elf_elfheader (input_bfd)->e_shstrndx, |
| 1265 | elf_section_data (input_section)->rel_hdr.sh_name)); |
| 1266 | if (name == NULL) |
| 1267 | return false; |
| 1268 | |
| 1269 | BFD_ASSERT (strncmp (name, ".rela", 5) == 0 |
| 1270 | && strcmp (bfd_get_section_name (input_bfd, |
| 1271 | input_section), |
| 1272 | name + 5) == 0); |
| 1273 | |
| 1274 | sreloc = bfd_get_section_by_name (dynobj, name); |
| 1275 | BFD_ASSERT (sreloc != NULL); |
| 1276 | } |
| 1277 | |
| 1278 | skip = false; |
| 1279 | |
| 1280 | if (elf_section_data (input_section)->stab_info == NULL) |
| 1281 | outrel.r_offset = rel->r_offset; |
| 1282 | else |
| 1283 | { |
| 1284 | bfd_vma off; |
| 1285 | |
| 1286 | off = (_bfd_stab_section_offset |
| 1287 | (output_bfd, &elf_hash_table (info)->stab_info, |
| 1288 | input_section, |
| 1289 | &elf_section_data (input_section)->stab_info, |
| 1290 | rel->r_offset)); |
| 1291 | if (off == (bfd_vma) -1) |
| 1292 | skip = true; |
| 1293 | outrel.r_offset = off; |
| 1294 | } |
| 1295 | |
| 1296 | outrel.r_offset += (input_section->output_section->vma |
| 1297 | + input_section->output_offset); |
| 1298 | |
| 1299 | if (skip) |
| 1300 | memset (&outrel, 0, sizeof outrel); |
| 1301 | /* h->dynindx may be -1 if the symbol was marked to |
| 1302 | become local. */ |
| 1303 | else if (h != NULL |
| 1304 | && ((! info->symbolic && h->dynindx != -1) |
| 1305 | || (h->elf_link_hash_flags |
| 1306 | & ELF_LINK_HASH_DEF_REGULAR) == 0)) |
| 1307 | { |
| 1308 | BFD_ASSERT (h->dynindx != -1); |
| 1309 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); |
| 1310 | outrel.r_addend = rel->r_addend; |
| 1311 | } |
| 1312 | else |
| 1313 | { |
| 1314 | if (r_type == R_SPARC_32) |
| 1315 | { |
| 1316 | outrel.r_info = ELF32_R_INFO (0, R_SPARC_RELATIVE); |
| 1317 | outrel.r_addend = relocation + rel->r_addend; |
| 1318 | } |
| 1319 | else |
| 1320 | { |
| 1321 | long indx; |
| 1322 | |
| 1323 | if (h == NULL) |
| 1324 | sec = local_sections[r_symndx]; |
| 1325 | else |
| 1326 | { |
| 1327 | BFD_ASSERT (h->root.type == bfd_link_hash_defined |
| 1328 | || (h->root.type |
| 1329 | == bfd_link_hash_defweak)); |
| 1330 | sec = h->root.u.def.section; |
| 1331 | } |
| 1332 | if (sec != NULL && bfd_is_abs_section (sec)) |
| 1333 | indx = 0; |
| 1334 | else if (sec == NULL || sec->owner == NULL) |
| 1335 | { |
| 1336 | bfd_set_error (bfd_error_bad_value); |
| 1337 | return false; |
| 1338 | } |
| 1339 | else |
| 1340 | { |
| 1341 | asection *osec; |
| 1342 | |
| 1343 | osec = sec->output_section; |
| 1344 | indx = elf_section_data (osec)->dynindx; |
| 1345 | if (indx == 0) |
| 1346 | abort (); |
| 1347 | } |
| 1348 | |
| 1349 | outrel.r_info = ELF32_R_INFO (indx, r_type); |
| 1350 | outrel.r_addend = relocation + rel->r_addend; |
| 1351 | } |
| 1352 | } |
| 1353 | |
| 1354 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, |
| 1355 | (((Elf32_External_Rela *) |
| 1356 | sreloc->contents) |
| 1357 | + sreloc->reloc_count)); |
| 1358 | ++sreloc->reloc_count; |
| 1359 | |
| 1360 | /* This reloc will be computed at runtime, so there's no |
| 1361 | need to do anything now, unless this is a RELATIVE |
| 1362 | reloc in an unallocated section. */ |
| 1363 | if (skip |
| 1364 | || (input_section->flags & SEC_ALLOC) != 0 |
| 1365 | || ELF32_R_TYPE (outrel.r_info) != R_SPARC_RELATIVE) |
| 1366 | continue; |
| 1367 | } |
| 1368 | break; |
| 1369 | |
| 1370 | default: |
| 1371 | break; |
| 1372 | } |
| 1373 | |
| 1374 | if (r_type != R_SPARC_WDISP16) |
| 1375 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 1376 | contents, rel->r_offset, |
| 1377 | relocation, rel->r_addend); |
| 1378 | else |
| 1379 | { |
| 1380 | bfd_vma x; |
| 1381 | |
| 1382 | relocation += rel->r_addend; |
| 1383 | relocation -= (input_section->output_section->vma |
| 1384 | + input_section->output_offset); |
| 1385 | relocation -= rel->r_offset; |
| 1386 | |
| 1387 | x = bfd_get_32 (input_bfd, contents + rel->r_offset); |
| 1388 | x |= ((((relocation >> 2) & 0xc000) << 6) |
| 1389 | | ((relocation >> 2) & 0x3fff)); |
| 1390 | bfd_put_32 (input_bfd, x, contents + rel->r_offset); |
| 1391 | |
| 1392 | if ((bfd_signed_vma) relocation < - 0x40000 |
| 1393 | || (bfd_signed_vma) relocation > 0x3ffff) |
| 1394 | r = bfd_reloc_overflow; |
| 1395 | else |
| 1396 | r = bfd_reloc_ok; |
| 1397 | } |
| 1398 | |
| 1399 | if (r != bfd_reloc_ok) |
| 1400 | { |
| 1401 | switch (r) |
| 1402 | { |
| 1403 | default: |
| 1404 | case bfd_reloc_outofrange: |
| 1405 | abort (); |
| 1406 | case bfd_reloc_overflow: |
| 1407 | { |
| 1408 | const char *name; |
| 1409 | |
| 1410 | if (h != NULL) |
| 1411 | name = h->root.root.string; |
| 1412 | else |
| 1413 | { |
| 1414 | name = bfd_elf_string_from_elf_section (input_bfd, |
| 1415 | symtab_hdr->sh_link, |
| 1416 | sym->st_name); |
| 1417 | if (name == NULL) |
| 1418 | return false; |
| 1419 | if (*name == '\0') |
| 1420 | name = bfd_section_name (input_bfd, sec); |
| 1421 | } |
| 1422 | if (! ((*info->callbacks->reloc_overflow) |
| 1423 | (info, name, howto->name, (bfd_vma) 0, |
| 1424 | input_bfd, input_section, rel->r_offset))) |
| 1425 | return false; |
| 1426 | } |
| 1427 | break; |
| 1428 | } |
| 1429 | } |
| 1430 | } |
| 1431 | |
| 1432 | return true; |
| 1433 | } |
| 1434 | |
| 1435 | /* Finish up dynamic symbol handling. We set the contents of various |
| 1436 | dynamic sections here. */ |
| 1437 | |
| 1438 | static boolean |
| 1439 | elf32_sparc_finish_dynamic_symbol (output_bfd, info, h, sym) |
| 1440 | bfd *output_bfd; |
| 1441 | struct bfd_link_info *info; |
| 1442 | struct elf_link_hash_entry *h; |
| 1443 | Elf_Internal_Sym *sym; |
| 1444 | { |
| 1445 | bfd *dynobj; |
| 1446 | |
| 1447 | dynobj = elf_hash_table (info)->dynobj; |
| 1448 | |
| 1449 | if (h->plt_offset != (bfd_vma) -1) |
| 1450 | { |
| 1451 | asection *splt; |
| 1452 | asection *srela; |
| 1453 | Elf_Internal_Rela rela; |
| 1454 | |
| 1455 | /* This symbol has an entry in the procedure linkage table. Set |
| 1456 | it up. */ |
| 1457 | |
| 1458 | BFD_ASSERT (h->dynindx != -1); |
| 1459 | |
| 1460 | splt = bfd_get_section_by_name (dynobj, ".plt"); |
| 1461 | srela = bfd_get_section_by_name (dynobj, ".rela.plt"); |
| 1462 | BFD_ASSERT (splt != NULL && srela != NULL); |
| 1463 | |
| 1464 | /* Fill in the entry in the procedure linkage table. */ |
| 1465 | bfd_put_32 (output_bfd, |
| 1466 | PLT_ENTRY_WORD0 + h->plt_offset, |
| 1467 | splt->contents + h->plt_offset); |
| 1468 | bfd_put_32 (output_bfd, |
| 1469 | (PLT_ENTRY_WORD1 |
| 1470 | + (((- (h->plt_offset + 4)) >> 2) & 0x3fffff)), |
| 1471 | splt->contents + h->plt_offset + 4); |
| 1472 | bfd_put_32 (output_bfd, PLT_ENTRY_WORD2, |
| 1473 | splt->contents + h->plt_offset + 8); |
| 1474 | |
| 1475 | /* Fill in the entry in the .rela.plt section. */ |
| 1476 | rela.r_offset = (splt->output_section->vma |
| 1477 | + splt->output_offset |
| 1478 | + h->plt_offset); |
| 1479 | rela.r_info = ELF32_R_INFO (h->dynindx, R_SPARC_JMP_SLOT); |
| 1480 | rela.r_addend = 0; |
| 1481 | bfd_elf32_swap_reloca_out (output_bfd, &rela, |
| 1482 | ((Elf32_External_Rela *) srela->contents |
| 1483 | + h->plt_offset / PLT_ENTRY_SIZE - 4)); |
| 1484 | |
| 1485 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) |
| 1486 | { |
| 1487 | /* Mark the symbol as undefined, rather than as defined in |
| 1488 | the .plt section. Leave the value alone. */ |
| 1489 | sym->st_shndx = SHN_UNDEF; |
| 1490 | } |
| 1491 | } |
| 1492 | |
| 1493 | if (h->got_offset != (bfd_vma) -1) |
| 1494 | { |
| 1495 | asection *sgot; |
| 1496 | asection *srela; |
| 1497 | Elf_Internal_Rela rela; |
| 1498 | |
| 1499 | /* This symbol has an entry in the global offset table. Set it |
| 1500 | up. */ |
| 1501 | |
| 1502 | sgot = bfd_get_section_by_name (dynobj, ".got"); |
| 1503 | srela = bfd_get_section_by_name (dynobj, ".rela.got"); |
| 1504 | BFD_ASSERT (sgot != NULL && srela != NULL); |
| 1505 | |
| 1506 | rela.r_offset = (sgot->output_section->vma |
| 1507 | + sgot->output_offset |
| 1508 | + (h->got_offset &~ 1)); |
| 1509 | |
| 1510 | /* If this is a -Bsymbolic link, and the symbol is defined |
| 1511 | locally, we just want to emit a RELATIVE reloc. Likewise if |
| 1512 | the symbol was forced to be local because of a version file. |
| 1513 | The entry in the global offset table will already have been |
| 1514 | initialized in the relocate_section function. */ |
| 1515 | if (info->shared |
| 1516 | && (info->symbolic || h->dynindx == -1) |
| 1517 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)) |
| 1518 | rela.r_info = ELF32_R_INFO (0, R_SPARC_RELATIVE); |
| 1519 | else |
| 1520 | { |
| 1521 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got_offset); |
| 1522 | rela.r_info = ELF32_R_INFO (h->dynindx, R_SPARC_GLOB_DAT); |
| 1523 | } |
| 1524 | |
| 1525 | rela.r_addend = 0; |
| 1526 | bfd_elf32_swap_reloca_out (output_bfd, &rela, |
| 1527 | ((Elf32_External_Rela *) srela->contents |
| 1528 | + srela->reloc_count)); |
| 1529 | ++srela->reloc_count; |
| 1530 | } |
| 1531 | |
| 1532 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0) |
| 1533 | { |
| 1534 | asection *s; |
| 1535 | Elf_Internal_Rela rela; |
| 1536 | |
| 1537 | /* This symbols needs a copy reloc. Set it up. */ |
| 1538 | |
| 1539 | BFD_ASSERT (h->dynindx != -1); |
| 1540 | |
| 1541 | s = bfd_get_section_by_name (h->root.u.def.section->owner, |
| 1542 | ".rela.bss"); |
| 1543 | BFD_ASSERT (s != NULL); |
| 1544 | |
| 1545 | rela.r_offset = (h->root.u.def.value |
| 1546 | + h->root.u.def.section->output_section->vma |
| 1547 | + h->root.u.def.section->output_offset); |
| 1548 | rela.r_info = ELF32_R_INFO (h->dynindx, R_SPARC_COPY); |
| 1549 | rela.r_addend = 0; |
| 1550 | bfd_elf32_swap_reloca_out (output_bfd, &rela, |
| 1551 | ((Elf32_External_Rela *) s->contents |
| 1552 | + s->reloc_count)); |
| 1553 | ++s->reloc_count; |
| 1554 | } |
| 1555 | |
| 1556 | /* Mark some specially defined symbols as absolute. */ |
| 1557 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 |
| 1558 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0 |
| 1559 | || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0) |
| 1560 | sym->st_shndx = SHN_ABS; |
| 1561 | |
| 1562 | return true; |
| 1563 | } |
| 1564 | |
| 1565 | /* Finish up the dynamic sections. */ |
| 1566 | |
| 1567 | static boolean |
| 1568 | elf32_sparc_finish_dynamic_sections (output_bfd, info) |
| 1569 | bfd *output_bfd; |
| 1570 | struct bfd_link_info *info; |
| 1571 | { |
| 1572 | bfd *dynobj; |
| 1573 | asection *sdyn; |
| 1574 | asection *sgot; |
| 1575 | |
| 1576 | dynobj = elf_hash_table (info)->dynobj; |
| 1577 | |
| 1578 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); |
| 1579 | |
| 1580 | if (elf_hash_table (info)->dynamic_sections_created) |
| 1581 | { |
| 1582 | asection *splt; |
| 1583 | Elf32_External_Dyn *dyncon, *dynconend; |
| 1584 | |
| 1585 | splt = bfd_get_section_by_name (dynobj, ".plt"); |
| 1586 | BFD_ASSERT (splt != NULL && sdyn != NULL); |
| 1587 | |
| 1588 | dyncon = (Elf32_External_Dyn *) sdyn->contents; |
| 1589 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size); |
| 1590 | for (; dyncon < dynconend; dyncon++) |
| 1591 | { |
| 1592 | Elf_Internal_Dyn dyn; |
| 1593 | const char *name; |
| 1594 | boolean size; |
| 1595 | |
| 1596 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); |
| 1597 | |
| 1598 | switch (dyn.d_tag) |
| 1599 | { |
| 1600 | case DT_PLTGOT: name = ".plt"; size = false; break; |
| 1601 | case DT_PLTRELSZ: name = ".rela.plt"; size = true; break; |
| 1602 | case DT_JMPREL: name = ".rela.plt"; size = false; break; |
| 1603 | default: name = NULL; size = false; break; |
| 1604 | } |
| 1605 | |
| 1606 | if (name != NULL) |
| 1607 | { |
| 1608 | asection *s; |
| 1609 | |
| 1610 | s = bfd_get_section_by_name (output_bfd, name); |
| 1611 | if (s == NULL) |
| 1612 | dyn.d_un.d_val = 0; |
| 1613 | else |
| 1614 | { |
| 1615 | if (! size) |
| 1616 | dyn.d_un.d_ptr = s->vma; |
| 1617 | else |
| 1618 | { |
| 1619 | if (s->_cooked_size != 0) |
| 1620 | dyn.d_un.d_val = s->_cooked_size; |
| 1621 | else |
| 1622 | dyn.d_un.d_val = s->_raw_size; |
| 1623 | } |
| 1624 | } |
| 1625 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 1626 | } |
| 1627 | } |
| 1628 | |
| 1629 | /* Clear the first four entries in the procedure linkage table, |
| 1630 | and put a nop in the last four bytes. */ |
| 1631 | if (splt->_raw_size > 0) |
| 1632 | { |
| 1633 | memset (splt->contents, 0, 4 * PLT_ENTRY_SIZE); |
| 1634 | bfd_put_32 (output_bfd, SPARC_NOP, |
| 1635 | splt->contents + splt->_raw_size - 4); |
| 1636 | } |
| 1637 | |
| 1638 | elf_section_data (splt->output_section)->this_hdr.sh_entsize = |
| 1639 | PLT_ENTRY_SIZE; |
| 1640 | } |
| 1641 | |
| 1642 | /* Set the first entry in the global offset table to the address of |
| 1643 | the dynamic section. */ |
| 1644 | sgot = bfd_get_section_by_name (dynobj, ".got"); |
| 1645 | BFD_ASSERT (sgot != NULL); |
| 1646 | if (sgot->_raw_size > 0) |
| 1647 | { |
| 1648 | if (sdyn == NULL) |
| 1649 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); |
| 1650 | else |
| 1651 | bfd_put_32 (output_bfd, |
| 1652 | sdyn->output_section->vma + sdyn->output_offset, |
| 1653 | sgot->contents); |
| 1654 | } |
| 1655 | |
| 1656 | elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; |
| 1657 | |
| 1658 | if (info->shared) |
| 1659 | { |
| 1660 | asection *sdynsym; |
| 1661 | asection *s; |
| 1662 | Elf_Internal_Sym sym; |
| 1663 | int c; |
| 1664 | |
| 1665 | /* Set up the section symbols for the output sections. */ |
| 1666 | |
| 1667 | sdynsym = bfd_get_section_by_name (dynobj, ".dynsym"); |
| 1668 | BFD_ASSERT (sdynsym != NULL); |
| 1669 | |
| 1670 | sym.st_size = 0; |
| 1671 | sym.st_name = 0; |
| 1672 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); |
| 1673 | sym.st_other = 0; |
| 1674 | |
| 1675 | c = 0; |
| 1676 | for (s = output_bfd->sections; s != NULL; s = s->next) |
| 1677 | { |
| 1678 | int indx; |
| 1679 | |
| 1680 | if (elf_section_data (s)->dynindx == 0) |
| 1681 | continue; |
| 1682 | |
| 1683 | sym.st_value = s->vma; |
| 1684 | |
| 1685 | indx = elf_section_data (s)->this_idx; |
| 1686 | BFD_ASSERT (indx > 0); |
| 1687 | sym.st_shndx = indx; |
| 1688 | |
| 1689 | bfd_elf32_swap_symbol_out (output_bfd, &sym, |
| 1690 | (PTR) (((Elf32_External_Sym *) |
| 1691 | sdynsym->contents) |
| 1692 | + elf_section_data (s)->dynindx)); |
| 1693 | |
| 1694 | ++c; |
| 1695 | } |
| 1696 | |
| 1697 | /* Set the sh_info field of the output .dynsym section to the |
| 1698 | index of the first global symbol. */ |
| 1699 | elf_section_data (sdynsym->output_section)->this_hdr.sh_info = c + 1; |
| 1700 | } |
| 1701 | |
| 1702 | return true; |
| 1703 | } |
| 1704 | \f |
| 1705 | /* Functions for dealing with the e_flags field. |
| 1706 | |
| 1707 | We don't define set_private_flags or copy_private_bfd_data because |
| 1708 | the only currently defined values are based on the bfd mach number, |
| 1709 | so we use the latter instead and defer setting e_flags until the |
| 1710 | file is written out. */ |
| 1711 | |
| 1712 | /* Merge backend specific data from an object file to the output |
| 1713 | object file when linking. */ |
| 1714 | |
| 1715 | static boolean |
| 1716 | elf32_sparc_merge_private_bfd_data (ibfd, obfd) |
| 1717 | bfd *ibfd; |
| 1718 | bfd *obfd; |
| 1719 | { |
| 1720 | boolean error; |
| 1721 | |
| 1722 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour |
| 1723 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) |
| 1724 | return true; |
| 1725 | |
| 1726 | error = false; |
| 1727 | |
| 1728 | #if 0 |
| 1729 | /* ??? The native linker doesn't do this so we can't (otherwise gcc would |
| 1730 | have to know which linker is being used). Instead, the native linker |
| 1731 | bumps up the architecture level when it has to. However, I still think |
| 1732 | warnings like these are good, so it would be nice to have them turned on |
| 1733 | by some option. */ |
| 1734 | |
| 1735 | /* If the output machine is normal sparc, we can't allow v9 input files. */ |
| 1736 | if (bfd_get_mach (obfd) == bfd_mach_sparc |
| 1737 | && (bfd_get_mach (ibfd) == bfd_mach_sparc_v8plus |
| 1738 | || bfd_get_mach (ibfd) == bfd_mach_sparc_v8plusa)) |
| 1739 | { |
| 1740 | error = true; |
| 1741 | (*_bfd_error_handler) |
| 1742 | ("%s: compiled for a v8plus system and target is v8", |
| 1743 | bfd_get_filename (ibfd)); |
| 1744 | } |
| 1745 | /* If the output machine is v9, we can't allow v9+vis input files. */ |
| 1746 | if (bfd_get_mach (obfd) == bfd_mach_sparc_v8plus |
| 1747 | && bfd_get_mach (ibfd) == bfd_mach_sparc_v8plusa) |
| 1748 | { |
| 1749 | error = true; |
| 1750 | (*_bfd_error_handler) |
| 1751 | ("%s: compiled for a v8plusa system and target is v8plus", |
| 1752 | bfd_get_filename (ibfd)); |
| 1753 | } |
| 1754 | #else |
| 1755 | if (bfd_get_mach (ibfd) >= bfd_mach_sparc_v9) |
| 1756 | { |
| 1757 | error = true; |
| 1758 | (*_bfd_error_handler) |
| 1759 | ("%s: compiled for a 64 bit system and target is 32 bit", |
| 1760 | bfd_get_filename (ibfd)); |
| 1761 | } |
| 1762 | else if (bfd_get_mach (obfd) < bfd_get_mach (ibfd)) |
| 1763 | bfd_set_arch_mach (obfd, bfd_arch_sparc, bfd_get_mach (ibfd)); |
| 1764 | #endif |
| 1765 | |
| 1766 | if (error) |
| 1767 | { |
| 1768 | bfd_set_error (bfd_error_bad_value); |
| 1769 | return false; |
| 1770 | } |
| 1771 | |
| 1772 | return true; |
| 1773 | } |
| 1774 | \f |
| 1775 | /* Set the right machine number. */ |
| 1776 | |
| 1777 | static boolean |
| 1778 | elf32_sparc_object_p (abfd) |
| 1779 | bfd *abfd; |
| 1780 | { |
| 1781 | if (elf_elfheader (abfd)->e_machine == EM_SPARC32PLUS) |
| 1782 | { |
| 1783 | if (elf_elfheader (abfd)->e_flags & EF_SPARC_SUN_US1) |
| 1784 | return bfd_default_set_arch_mach (abfd, bfd_arch_sparc, |
| 1785 | bfd_mach_sparc_v8plusa); |
| 1786 | else if (elf_elfheader (abfd)->e_flags & EF_SPARC_32PLUS) |
| 1787 | return bfd_default_set_arch_mach (abfd, bfd_arch_sparc, |
| 1788 | bfd_mach_sparc_v8plus); |
| 1789 | else |
| 1790 | return false; |
| 1791 | } |
| 1792 | else |
| 1793 | return bfd_default_set_arch_mach (abfd, bfd_arch_sparc, bfd_mach_sparc); |
| 1794 | } |
| 1795 | |
| 1796 | /* The final processing done just before writing out the object file. |
| 1797 | We need to set the e_machine field appropriately. */ |
| 1798 | |
| 1799 | static void |
| 1800 | elf32_sparc_final_write_processing (abfd, linker) |
| 1801 | bfd *abfd; |
| 1802 | boolean linker; |
| 1803 | { |
| 1804 | switch (bfd_get_mach (abfd)) |
| 1805 | { |
| 1806 | case bfd_mach_sparc : |
| 1807 | break; /* nothing to do */ |
| 1808 | case bfd_mach_sparc_v8plus : |
| 1809 | elf_elfheader (abfd)->e_machine = EM_SPARC32PLUS; |
| 1810 | elf_elfheader (abfd)->e_flags &=~ EF_SPARC_32PLUS_MASK; |
| 1811 | elf_elfheader (abfd)->e_flags |= EF_SPARC_32PLUS; |
| 1812 | break; |
| 1813 | case bfd_mach_sparc_v8plusa : |
| 1814 | elf_elfheader (abfd)->e_machine = EM_SPARC32PLUS; |
| 1815 | elf_elfheader (abfd)->e_flags &=~ EF_SPARC_32PLUS_MASK; |
| 1816 | elf_elfheader (abfd)->e_flags |= EF_SPARC_32PLUS | EF_SPARC_SUN_US1; |
| 1817 | break; |
| 1818 | default : |
| 1819 | abort (); |
| 1820 | } |
| 1821 | } |
| 1822 | \f |
| 1823 | #define TARGET_BIG_SYM bfd_elf32_sparc_vec |
| 1824 | #define TARGET_BIG_NAME "elf32-sparc" |
| 1825 | #define ELF_ARCH bfd_arch_sparc |
| 1826 | #define ELF_MACHINE_CODE EM_SPARC |
| 1827 | #define ELF_MACHINE_ALT1 EM_SPARC32PLUS |
| 1828 | #define ELF_MAXPAGESIZE 0x10000 |
| 1829 | |
| 1830 | #define bfd_elf32_bfd_reloc_type_lookup elf32_sparc_reloc_type_lookup |
| 1831 | #define elf_info_to_howto elf32_sparc_info_to_howto |
| 1832 | #define elf_backend_create_dynamic_sections \ |
| 1833 | _bfd_elf_create_dynamic_sections |
| 1834 | #define elf_backend_check_relocs elf32_sparc_check_relocs |
| 1835 | #define elf_backend_adjust_dynamic_symbol \ |
| 1836 | elf32_sparc_adjust_dynamic_symbol |
| 1837 | #define elf_backend_size_dynamic_sections \ |
| 1838 | elf32_sparc_size_dynamic_sections |
| 1839 | #define elf_backend_relocate_section elf32_sparc_relocate_section |
| 1840 | #define elf_backend_finish_dynamic_symbol \ |
| 1841 | elf32_sparc_finish_dynamic_symbol |
| 1842 | #define elf_backend_finish_dynamic_sections \ |
| 1843 | elf32_sparc_finish_dynamic_sections |
| 1844 | #define bfd_elf32_bfd_merge_private_bfd_data \ |
| 1845 | elf32_sparc_merge_private_bfd_data |
| 1846 | #define elf_backend_object_p elf32_sparc_object_p |
| 1847 | #define elf_backend_final_write_processing \ |
| 1848 | elf32_sparc_final_write_processing |
| 1849 | #define elf_backend_want_got_plt 0 |
| 1850 | #define elf_backend_plt_readonly 0 |
| 1851 | #define elf_backend_want_plt_sym 1 |
| 1852 | |
| 1853 | #include "elf32-target.h" |