| 1 | /* SPARC-specific support for 32-bit ELF |
| 2 | Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001 |
| 3 | 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 "bfdlink.h" |
| 24 | #include "libbfd.h" |
| 25 | #include "elf-bfd.h" |
| 26 | #include "elf/sparc.h" |
| 27 | #include "opcode/sparc.h" |
| 28 | |
| 29 | static reloc_howto_type *elf32_sparc_reloc_type_lookup |
| 30 | PARAMS ((bfd *, bfd_reloc_code_real_type)); |
| 31 | static void elf32_sparc_info_to_howto |
| 32 | PARAMS ((bfd *, arelent *, Elf_Internal_Rela *)); |
| 33 | static boolean elf32_sparc_check_relocs |
| 34 | PARAMS ((bfd *, struct bfd_link_info *, asection *, |
| 35 | const Elf_Internal_Rela *)); |
| 36 | static boolean elf32_sparc_adjust_dynamic_symbol |
| 37 | PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); |
| 38 | static boolean elf32_sparc_size_dynamic_sections |
| 39 | PARAMS ((bfd *, struct bfd_link_info *)); |
| 40 | static boolean elf32_sparc_relax_section |
| 41 | PARAMS ((bfd *, asection *, struct bfd_link_info *, boolean *)); |
| 42 | static boolean elf32_sparc_relocate_section |
| 43 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, |
| 44 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); |
| 45 | static boolean elf32_sparc_finish_dynamic_symbol |
| 46 | PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, |
| 47 | Elf_Internal_Sym *)); |
| 48 | static boolean elf32_sparc_finish_dynamic_sections |
| 49 | PARAMS ((bfd *, struct bfd_link_info *)); |
| 50 | static boolean elf32_sparc_merge_private_bfd_data PARAMS ((bfd *, bfd *)); |
| 51 | static boolean elf32_sparc_object_p |
| 52 | PARAMS ((bfd *)); |
| 53 | static void elf32_sparc_final_write_processing |
| 54 | PARAMS ((bfd *, boolean)); |
| 55 | static enum elf_reloc_type_class elf32_sparc_reloc_type_class |
| 56 | PARAMS ((const Elf_Internal_Rela *)); |
| 57 | static asection * elf32_sparc_gc_mark_hook |
| 58 | PARAMS ((bfd *, struct bfd_link_info *, Elf_Internal_Rela *, |
| 59 | struct elf_link_hash_entry *, Elf_Internal_Sym *)); |
| 60 | static boolean elf32_sparc_gc_sweep_hook |
| 61 | PARAMS ((bfd *, struct bfd_link_info *, asection *, |
| 62 | const Elf_Internal_Rela *)); |
| 63 | \f |
| 64 | /* The relocation "howto" table. */ |
| 65 | |
| 66 | static bfd_reloc_status_type sparc_elf_notsupported_reloc |
| 67 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| 68 | static bfd_reloc_status_type sparc_elf_wdisp16_reloc |
| 69 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| 70 | |
| 71 | reloc_howto_type _bfd_sparc_elf_howto_table[] = |
| 72 | { |
| 73 | HOWTO(R_SPARC_NONE, 0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_NONE", false,0,0x00000000,true), |
| 74 | HOWTO(R_SPARC_8, 0,0, 8,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_8", false,0,0x000000ff,true), |
| 75 | HOWTO(R_SPARC_16, 0,1,16,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_16", false,0,0x0000ffff,true), |
| 76 | HOWTO(R_SPARC_32, 0,2,32,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_32", false,0,0xffffffff,true), |
| 77 | HOWTO(R_SPARC_DISP8, 0,0, 8,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_DISP8", false,0,0x000000ff,true), |
| 78 | HOWTO(R_SPARC_DISP16, 0,1,16,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_DISP16", false,0,0x0000ffff,true), |
| 79 | HOWTO(R_SPARC_DISP32, 0,2,32,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_DISP32", false,0,0xffffffff,true), |
| 80 | HOWTO(R_SPARC_WDISP30, 2,2,30,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_WDISP30", false,0,0x3fffffff,true), |
| 81 | HOWTO(R_SPARC_WDISP22, 2,2,22,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_WDISP22", false,0,0x003fffff,true), |
| 82 | HOWTO(R_SPARC_HI22, 10,2,22,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_HI22", false,0,0x003fffff,true), |
| 83 | HOWTO(R_SPARC_22, 0,2,22,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_22", false,0,0x003fffff,true), |
| 84 | HOWTO(R_SPARC_13, 0,2,13,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_13", false,0,0x00001fff,true), |
| 85 | HOWTO(R_SPARC_LO10, 0,2,10,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_LO10", false,0,0x000003ff,true), |
| 86 | HOWTO(R_SPARC_GOT10, 0,2,10,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_GOT10", false,0,0x000003ff,true), |
| 87 | HOWTO(R_SPARC_GOT13, 0,2,13,false,0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_GOT13", false,0,0x00001fff,true), |
| 88 | HOWTO(R_SPARC_GOT22, 10,2,22,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_GOT22", false,0,0x003fffff,true), |
| 89 | HOWTO(R_SPARC_PC10, 0,2,10,true, 0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_PC10", false,0,0x000003ff,true), |
| 90 | HOWTO(R_SPARC_PC22, 10,2,22,true, 0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_PC22", false,0,0x003fffff,true), |
| 91 | HOWTO(R_SPARC_WPLT30, 2,2,30,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_WPLT30", false,0,0x3fffffff,true), |
| 92 | HOWTO(R_SPARC_COPY, 0,0,00,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_COPY", false,0,0x00000000,true), |
| 93 | 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), |
| 94 | 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), |
| 95 | HOWTO(R_SPARC_RELATIVE, 0,0,00,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_RELATIVE",false,0,0x00000000,true), |
| 96 | HOWTO(R_SPARC_UA32, 0,2,32,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_UA32", false,0,0xffffffff,true), |
| 97 | HOWTO(R_SPARC_PLT32, 0,0,00,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_PLT32", false,0,0xffffffff,true), |
| 98 | HOWTO(R_SPARC_HIPLT22, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_HIPLT22", false,0,0x00000000,true), |
| 99 | HOWTO(R_SPARC_LOPLT10, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_LOPLT10", false,0,0x00000000,true), |
| 100 | HOWTO(R_SPARC_PCPLT32, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_PCPLT32", false,0,0x00000000,true), |
| 101 | HOWTO(R_SPARC_PCPLT22, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_PCPLT22", false,0,0x00000000,true), |
| 102 | HOWTO(R_SPARC_PCPLT10, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_PCPLT10", false,0,0x00000000,true), |
| 103 | HOWTO(R_SPARC_10, 0,2,10,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_10", false,0,0x000003ff,true), |
| 104 | HOWTO(R_SPARC_11, 0,2,11,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_11", false,0,0x000007ff,true), |
| 105 | /* These are for sparc64 in a 64 bit environment. |
| 106 | Values need to be here because the table is indexed by reloc number. */ |
| 107 | HOWTO(R_SPARC_64, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_64", false,0,0x00000000,true), |
| 108 | HOWTO(R_SPARC_OLO10, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_OLO10", false,0,0x00000000,true), |
| 109 | HOWTO(R_SPARC_HH22, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_HH22", false,0,0x00000000,true), |
| 110 | HOWTO(R_SPARC_HM10, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_HM10", false,0,0x00000000,true), |
| 111 | HOWTO(R_SPARC_LM22, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_LM22", false,0,0x00000000,true), |
| 112 | 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), |
| 113 | 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), |
| 114 | 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), |
| 115 | /* End sparc64 in 64 bit environment values. |
| 116 | The following are for sparc64 in a 32 bit environment. */ |
| 117 | HOWTO(R_SPARC_WDISP16, 2,2,16,true, 0,complain_overflow_signed, sparc_elf_wdisp16_reloc,"R_SPARC_WDISP16", false,0,0x00000000,true), |
| 118 | HOWTO(R_SPARC_WDISP19, 2,2,19,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_WDISP19", false,0,0x0007ffff,true), |
| 119 | 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), |
| 120 | HOWTO(R_SPARC_7, 0,2, 7,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_7", false,0,0x0000007f,true), |
| 121 | HOWTO(R_SPARC_5, 0,2, 5,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_5", false,0,0x0000001f,true), |
| 122 | HOWTO(R_SPARC_6, 0,2, 6,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_6", false,0,0x0000003f,true), |
| 123 | HOWTO(R_SPARC_NONE, 0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_NONE", false,0,0x00000000,true), |
| 124 | HOWTO(R_SPARC_NONE, 0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_NONE", false,0,0x00000000,true), |
| 125 | HOWTO(R_SPARC_NONE, 0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_NONE", false,0,0x00000000,true), |
| 126 | HOWTO(R_SPARC_NONE, 0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_NONE", false,0,0x00000000,true), |
| 127 | HOWTO(R_SPARC_NONE, 0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_NONE", false,0,0x00000000,true), |
| 128 | HOWTO(R_SPARC_NONE, 0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_NONE", false,0,0x00000000,true), |
| 129 | HOWTO(R_SPARC_NONE, 0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_NONE", false,0,0x00000000,true), |
| 130 | HOWTO(R_SPARC_NONE, 0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_NONE", false,0,0x00000000,true), |
| 131 | HOWTO(R_SPARC_UA64, 0,0, 0,false,0,complain_overflow_dont, sparc_elf_notsupported_reloc, "R_SPARC_UA64", false,0,0x00000000,true), |
| 132 | HOWTO(R_SPARC_UA16, 0,1,16,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_UA16", false,0,0x0000ffff,true), |
| 133 | HOWTO(R_SPARC_REV32, 0,2,32,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_REV32", false,0,0xffffffff,true), |
| 134 | }; |
| 135 | static reloc_howto_type elf32_sparc_vtinherit_howto = |
| 136 | HOWTO (R_SPARC_GNU_VTINHERIT, 0,2,0,false,0,complain_overflow_dont, NULL, "R_SPARC_GNU_VTINHERIT", false,0, 0, false); |
| 137 | static reloc_howto_type elf32_sparc_vtentry_howto = |
| 138 | HOWTO (R_SPARC_GNU_VTENTRY, 0,2,0,false,0,complain_overflow_dont, _bfd_elf_rel_vtable_reloc_fn,"R_SPARC_GNU_VTENTRY", false,0,0, false); |
| 139 | |
| 140 | struct elf_reloc_map { |
| 141 | bfd_reloc_code_real_type bfd_reloc_val; |
| 142 | unsigned char elf_reloc_val; |
| 143 | }; |
| 144 | |
| 145 | static const struct elf_reloc_map sparc_reloc_map[] = |
| 146 | { |
| 147 | { BFD_RELOC_NONE, R_SPARC_NONE, }, |
| 148 | { BFD_RELOC_16, R_SPARC_16, }, |
| 149 | { BFD_RELOC_16_PCREL, R_SPARC_DISP16 }, |
| 150 | { BFD_RELOC_8, R_SPARC_8 }, |
| 151 | { BFD_RELOC_8_PCREL, R_SPARC_DISP8 }, |
| 152 | { BFD_RELOC_CTOR, R_SPARC_32 }, |
| 153 | { BFD_RELOC_32, R_SPARC_32 }, |
| 154 | { BFD_RELOC_32_PCREL, R_SPARC_DISP32 }, |
| 155 | { BFD_RELOC_HI22, R_SPARC_HI22 }, |
| 156 | { BFD_RELOC_LO10, R_SPARC_LO10, }, |
| 157 | { BFD_RELOC_32_PCREL_S2, R_SPARC_WDISP30 }, |
| 158 | { BFD_RELOC_SPARC_PLT32, R_SPARC_PLT32 }, |
| 159 | { BFD_RELOC_SPARC22, R_SPARC_22 }, |
| 160 | { BFD_RELOC_SPARC13, R_SPARC_13 }, |
| 161 | { BFD_RELOC_SPARC_GOT10, R_SPARC_GOT10 }, |
| 162 | { BFD_RELOC_SPARC_GOT13, R_SPARC_GOT13 }, |
| 163 | { BFD_RELOC_SPARC_GOT22, R_SPARC_GOT22 }, |
| 164 | { BFD_RELOC_SPARC_PC10, R_SPARC_PC10 }, |
| 165 | { BFD_RELOC_SPARC_PC22, R_SPARC_PC22 }, |
| 166 | { BFD_RELOC_SPARC_WPLT30, R_SPARC_WPLT30 }, |
| 167 | { BFD_RELOC_SPARC_COPY, R_SPARC_COPY }, |
| 168 | { BFD_RELOC_SPARC_GLOB_DAT, R_SPARC_GLOB_DAT }, |
| 169 | { BFD_RELOC_SPARC_JMP_SLOT, R_SPARC_JMP_SLOT }, |
| 170 | { BFD_RELOC_SPARC_RELATIVE, R_SPARC_RELATIVE }, |
| 171 | { BFD_RELOC_SPARC_WDISP22, R_SPARC_WDISP22 }, |
| 172 | { BFD_RELOC_SPARC_UA16, R_SPARC_UA16 }, |
| 173 | { BFD_RELOC_SPARC_UA32, R_SPARC_UA32 }, |
| 174 | { BFD_RELOC_SPARC_UA64, R_SPARC_UA64 }, |
| 175 | { BFD_RELOC_SPARC_10, R_SPARC_10 }, |
| 176 | { BFD_RELOC_SPARC_11, R_SPARC_11 }, |
| 177 | { BFD_RELOC_SPARC_64, R_SPARC_64 }, |
| 178 | { BFD_RELOC_SPARC_OLO10, R_SPARC_OLO10 }, |
| 179 | { BFD_RELOC_SPARC_HH22, R_SPARC_HH22 }, |
| 180 | { BFD_RELOC_SPARC_HM10, R_SPARC_HM10 }, |
| 181 | { BFD_RELOC_SPARC_LM22, R_SPARC_LM22 }, |
| 182 | { BFD_RELOC_SPARC_PC_HH22, R_SPARC_PC_HH22 }, |
| 183 | { BFD_RELOC_SPARC_PC_HM10, R_SPARC_PC_HM10 }, |
| 184 | { BFD_RELOC_SPARC_PC_LM22, R_SPARC_PC_LM22 }, |
| 185 | { BFD_RELOC_SPARC_WDISP16, R_SPARC_WDISP16 }, |
| 186 | { BFD_RELOC_SPARC_WDISP19, R_SPARC_WDISP19 }, |
| 187 | { BFD_RELOC_SPARC_7, R_SPARC_7 }, |
| 188 | { BFD_RELOC_SPARC_5, R_SPARC_5 }, |
| 189 | { BFD_RELOC_SPARC_6, R_SPARC_6 }, |
| 190 | { BFD_RELOC_SPARC_REV32, R_SPARC_REV32 }, |
| 191 | { BFD_RELOC_VTABLE_INHERIT, R_SPARC_GNU_VTINHERIT }, |
| 192 | { BFD_RELOC_VTABLE_ENTRY, R_SPARC_GNU_VTENTRY }, |
| 193 | }; |
| 194 | |
| 195 | static reloc_howto_type * |
| 196 | elf32_sparc_reloc_type_lookup (abfd, code) |
| 197 | bfd *abfd ATTRIBUTE_UNUSED; |
| 198 | bfd_reloc_code_real_type code; |
| 199 | { |
| 200 | unsigned int i; |
| 201 | |
| 202 | switch (code) |
| 203 | { |
| 204 | case BFD_RELOC_VTABLE_INHERIT: |
| 205 | return &elf32_sparc_vtinherit_howto; |
| 206 | |
| 207 | case BFD_RELOC_VTABLE_ENTRY: |
| 208 | return &elf32_sparc_vtentry_howto; |
| 209 | |
| 210 | default: |
| 211 | for (i = 0; i < sizeof (sparc_reloc_map) / sizeof (struct elf_reloc_map); i++) |
| 212 | { |
| 213 | if (sparc_reloc_map[i].bfd_reloc_val == code) |
| 214 | return &_bfd_sparc_elf_howto_table[(int) sparc_reloc_map[i].elf_reloc_val]; |
| 215 | } |
| 216 | } |
| 217 | bfd_set_error (bfd_error_bad_value); |
| 218 | return NULL; |
| 219 | } |
| 220 | |
| 221 | /* We need to use ELF32_R_TYPE so we have our own copy of this function, |
| 222 | and elf64-sparc.c has its own copy. */ |
| 223 | |
| 224 | static void |
| 225 | elf32_sparc_info_to_howto (abfd, cache_ptr, dst) |
| 226 | bfd *abfd ATTRIBUTE_UNUSED; |
| 227 | arelent *cache_ptr; |
| 228 | Elf_Internal_Rela *dst; |
| 229 | { |
| 230 | switch (ELF32_R_TYPE(dst->r_info)) |
| 231 | { |
| 232 | case R_SPARC_GNU_VTINHERIT: |
| 233 | cache_ptr->howto = &elf32_sparc_vtinherit_howto; |
| 234 | break; |
| 235 | |
| 236 | case R_SPARC_GNU_VTENTRY: |
| 237 | cache_ptr->howto = &elf32_sparc_vtentry_howto; |
| 238 | break; |
| 239 | |
| 240 | default: |
| 241 | BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_SPARC_max_std); |
| 242 | cache_ptr->howto = &_bfd_sparc_elf_howto_table[ELF32_R_TYPE(dst->r_info)]; |
| 243 | } |
| 244 | } |
| 245 | \f |
| 246 | /* For unsupported relocs. */ |
| 247 | |
| 248 | static bfd_reloc_status_type |
| 249 | sparc_elf_notsupported_reloc (abfd, |
| 250 | reloc_entry, |
| 251 | symbol, |
| 252 | data, |
| 253 | input_section, |
| 254 | output_bfd, |
| 255 | error_message) |
| 256 | bfd *abfd ATTRIBUTE_UNUSED; |
| 257 | arelent *reloc_entry ATTRIBUTE_UNUSED; |
| 258 | asymbol *symbol ATTRIBUTE_UNUSED; |
| 259 | PTR data ATTRIBUTE_UNUSED; |
| 260 | asection *input_section ATTRIBUTE_UNUSED; |
| 261 | bfd *output_bfd ATTRIBUTE_UNUSED; |
| 262 | char **error_message ATTRIBUTE_UNUSED; |
| 263 | { |
| 264 | return bfd_reloc_notsupported; |
| 265 | } |
| 266 | |
| 267 | /* Handle the WDISP16 reloc. */ |
| 268 | |
| 269 | static bfd_reloc_status_type |
| 270 | sparc_elf_wdisp16_reloc (abfd, |
| 271 | reloc_entry, |
| 272 | symbol, |
| 273 | data, |
| 274 | input_section, |
| 275 | output_bfd, |
| 276 | error_message) |
| 277 | bfd *abfd; |
| 278 | arelent *reloc_entry; |
| 279 | asymbol *symbol; |
| 280 | PTR data; |
| 281 | asection *input_section; |
| 282 | bfd *output_bfd; |
| 283 | char **error_message ATTRIBUTE_UNUSED; |
| 284 | { |
| 285 | bfd_vma relocation; |
| 286 | bfd_vma x; |
| 287 | |
| 288 | if (output_bfd != (bfd *) NULL |
| 289 | && (symbol->flags & BSF_SECTION_SYM) == 0 |
| 290 | && (! reloc_entry->howto->partial_inplace |
| 291 | || reloc_entry->addend == 0)) |
| 292 | { |
| 293 | reloc_entry->address += input_section->output_offset; |
| 294 | return bfd_reloc_ok; |
| 295 | } |
| 296 | |
| 297 | if (output_bfd != NULL) |
| 298 | return bfd_reloc_continue; |
| 299 | |
| 300 | if (reloc_entry->address > input_section->_cooked_size) |
| 301 | return bfd_reloc_outofrange; |
| 302 | |
| 303 | relocation = (symbol->value |
| 304 | + symbol->section->output_section->vma |
| 305 | + symbol->section->output_offset); |
| 306 | relocation += reloc_entry->addend; |
| 307 | relocation -= (input_section->output_section->vma |
| 308 | + input_section->output_offset); |
| 309 | relocation -= reloc_entry->address; |
| 310 | |
| 311 | x = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address); |
| 312 | x |= ((((relocation >> 2) & 0xc000) << 6) |
| 313 | | ((relocation >> 2) & 0x3fff)); |
| 314 | bfd_put_32 (abfd, x, (bfd_byte *) data + reloc_entry->address); |
| 315 | |
| 316 | if ((bfd_signed_vma) relocation < - 0x40000 |
| 317 | || (bfd_signed_vma) relocation > 0x3ffff) |
| 318 | return bfd_reloc_overflow; |
| 319 | else |
| 320 | return bfd_reloc_ok; |
| 321 | } |
| 322 | \f |
| 323 | /* Functions for the SPARC ELF linker. */ |
| 324 | |
| 325 | /* The name of the dynamic interpreter. This is put in the .interp |
| 326 | section. */ |
| 327 | |
| 328 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" |
| 329 | |
| 330 | /* The nop opcode we use. */ |
| 331 | |
| 332 | #define SPARC_NOP 0x01000000 |
| 333 | |
| 334 | /* The size in bytes of an entry in the procedure linkage table. */ |
| 335 | |
| 336 | #define PLT_ENTRY_SIZE 12 |
| 337 | |
| 338 | /* The first four entries in a procedure linkage table are reserved, |
| 339 | and the initial contents are unimportant (we zero them out). |
| 340 | Subsequent entries look like this. See the SVR4 ABI SPARC |
| 341 | supplement to see how this works. */ |
| 342 | |
| 343 | /* sethi %hi(.-.plt0),%g1. We fill in the address later. */ |
| 344 | #define PLT_ENTRY_WORD0 0x03000000 |
| 345 | /* b,a .plt0. We fill in the offset later. */ |
| 346 | #define PLT_ENTRY_WORD1 0x30800000 |
| 347 | /* nop. */ |
| 348 | #define PLT_ENTRY_WORD2 SPARC_NOP |
| 349 | |
| 350 | /* Look through the relocs for a section during the first phase, and |
| 351 | allocate space in the global offset table or procedure linkage |
| 352 | table. */ |
| 353 | |
| 354 | static boolean |
| 355 | elf32_sparc_check_relocs (abfd, info, sec, relocs) |
| 356 | bfd *abfd; |
| 357 | struct bfd_link_info *info; |
| 358 | asection *sec; |
| 359 | const Elf_Internal_Rela *relocs; |
| 360 | { |
| 361 | bfd *dynobj; |
| 362 | Elf_Internal_Shdr *symtab_hdr; |
| 363 | struct elf_link_hash_entry **sym_hashes; |
| 364 | bfd_vma *local_got_offsets; |
| 365 | const Elf_Internal_Rela *rel; |
| 366 | const Elf_Internal_Rela *rel_end; |
| 367 | asection *sgot; |
| 368 | asection *srelgot; |
| 369 | asection *sreloc; |
| 370 | |
| 371 | if (info->relocateable) |
| 372 | return true; |
| 373 | |
| 374 | dynobj = elf_hash_table (info)->dynobj; |
| 375 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 376 | sym_hashes = elf_sym_hashes (abfd); |
| 377 | local_got_offsets = elf_local_got_offsets (abfd); |
| 378 | |
| 379 | sgot = NULL; |
| 380 | srelgot = NULL; |
| 381 | sreloc = NULL; |
| 382 | |
| 383 | rel_end = relocs + sec->reloc_count; |
| 384 | for (rel = relocs; rel < rel_end; rel++) |
| 385 | { |
| 386 | unsigned long r_symndx; |
| 387 | struct elf_link_hash_entry *h; |
| 388 | |
| 389 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 390 | if (r_symndx < symtab_hdr->sh_info) |
| 391 | h = NULL; |
| 392 | else |
| 393 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 394 | |
| 395 | switch (ELF32_R_TYPE (rel->r_info)) |
| 396 | { |
| 397 | case R_SPARC_GOT10: |
| 398 | case R_SPARC_GOT13: |
| 399 | case R_SPARC_GOT22: |
| 400 | /* This symbol requires a global offset table entry. */ |
| 401 | |
| 402 | if (dynobj == NULL) |
| 403 | { |
| 404 | /* Create the .got section. */ |
| 405 | elf_hash_table (info)->dynobj = dynobj = abfd; |
| 406 | if (! _bfd_elf_create_got_section (dynobj, info)) |
| 407 | return false; |
| 408 | } |
| 409 | |
| 410 | if (sgot == NULL) |
| 411 | { |
| 412 | sgot = bfd_get_section_by_name (dynobj, ".got"); |
| 413 | BFD_ASSERT (sgot != NULL); |
| 414 | } |
| 415 | |
| 416 | if (srelgot == NULL |
| 417 | && (h != NULL || info->shared)) |
| 418 | { |
| 419 | srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); |
| 420 | if (srelgot == NULL) |
| 421 | { |
| 422 | srelgot = bfd_make_section (dynobj, ".rela.got"); |
| 423 | if (srelgot == NULL |
| 424 | || ! bfd_set_section_flags (dynobj, srelgot, |
| 425 | (SEC_ALLOC |
| 426 | | SEC_LOAD |
| 427 | | SEC_HAS_CONTENTS |
| 428 | | SEC_IN_MEMORY |
| 429 | | SEC_LINKER_CREATED |
| 430 | | SEC_READONLY)) |
| 431 | || ! bfd_set_section_alignment (dynobj, srelgot, 2)) |
| 432 | return false; |
| 433 | } |
| 434 | } |
| 435 | |
| 436 | if (h != NULL) |
| 437 | { |
| 438 | if (h->got.offset != (bfd_vma) -1) |
| 439 | { |
| 440 | /* We have already allocated space in the .got. */ |
| 441 | break; |
| 442 | } |
| 443 | h->got.offset = sgot->_raw_size; |
| 444 | |
| 445 | /* Make sure this symbol is output as a dynamic symbol. */ |
| 446 | if (h->dynindx == -1) |
| 447 | { |
| 448 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) |
| 449 | return false; |
| 450 | } |
| 451 | |
| 452 | srelgot->_raw_size += sizeof (Elf32_External_Rela); |
| 453 | } |
| 454 | else |
| 455 | { |
| 456 | /* This is a global offset table entry for a local |
| 457 | symbol. */ |
| 458 | if (local_got_offsets == NULL) |
| 459 | { |
| 460 | bfd_size_type size; |
| 461 | register unsigned int i; |
| 462 | |
| 463 | size = symtab_hdr->sh_info; |
| 464 | size *= sizeof (bfd_vma); |
| 465 | local_got_offsets = (bfd_vma *) bfd_alloc (abfd, size); |
| 466 | if (local_got_offsets == NULL) |
| 467 | return false; |
| 468 | elf_local_got_offsets (abfd) = local_got_offsets; |
| 469 | for (i = 0; i < symtab_hdr->sh_info; i++) |
| 470 | local_got_offsets[i] = (bfd_vma) -1; |
| 471 | } |
| 472 | if (local_got_offsets[r_symndx] != (bfd_vma) -1) |
| 473 | { |
| 474 | /* We have already allocated space in the .got. */ |
| 475 | break; |
| 476 | } |
| 477 | local_got_offsets[r_symndx] = sgot->_raw_size; |
| 478 | |
| 479 | if (info->shared) |
| 480 | { |
| 481 | /* If we are generating a shared object, we need to |
| 482 | output a R_SPARC_RELATIVE reloc so that the |
| 483 | dynamic linker can adjust this GOT entry. */ |
| 484 | srelgot->_raw_size += sizeof (Elf32_External_Rela); |
| 485 | } |
| 486 | } |
| 487 | |
| 488 | sgot->_raw_size += 4; |
| 489 | |
| 490 | /* If the .got section is more than 0x1000 bytes, we add |
| 491 | 0x1000 to the value of _GLOBAL_OFFSET_TABLE_, so that 13 |
| 492 | bit relocations have a greater chance of working. */ |
| 493 | if (sgot->_raw_size >= 0x1000 |
| 494 | && elf_hash_table (info)->hgot->root.u.def.value == 0) |
| 495 | elf_hash_table (info)->hgot->root.u.def.value = 0x1000; |
| 496 | |
| 497 | break; |
| 498 | |
| 499 | case R_SPARC_PLT32: |
| 500 | case R_SPARC_WPLT30: |
| 501 | /* This symbol requires a procedure linkage table entry. We |
| 502 | actually build the entry in adjust_dynamic_symbol, |
| 503 | because this might be a case of linking PIC code without |
| 504 | linking in any dynamic objects, in which case we don't |
| 505 | need to generate a procedure linkage table after all. */ |
| 506 | |
| 507 | if (h == NULL) |
| 508 | { |
| 509 | /* The Solaris native assembler will generate a WPLT30 |
| 510 | reloc for a local symbol if you assemble a call from |
| 511 | one section to another when using -K pic. We treat |
| 512 | it as WDISP30. */ |
| 513 | if (ELF32_R_TYPE (rel->r_info) != R_SPARC_WPLT30) |
| 514 | goto r_sparc_plt32; |
| 515 | break; |
| 516 | } |
| 517 | |
| 518 | /* Make sure this symbol is output as a dynamic symbol. */ |
| 519 | if (h->dynindx == -1) |
| 520 | { |
| 521 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) |
| 522 | return false; |
| 523 | } |
| 524 | |
| 525 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; |
| 526 | |
| 527 | if (ELF32_R_TYPE (rel->r_info) != R_SPARC_WPLT30) |
| 528 | goto r_sparc_plt32; |
| 529 | break; |
| 530 | |
| 531 | case R_SPARC_PC10: |
| 532 | case R_SPARC_PC22: |
| 533 | if (h != NULL) |
| 534 | h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF; |
| 535 | |
| 536 | if (h != NULL |
| 537 | && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) |
| 538 | break; |
| 539 | /* Fall through. */ |
| 540 | case R_SPARC_DISP8: |
| 541 | case R_SPARC_DISP16: |
| 542 | case R_SPARC_DISP32: |
| 543 | case R_SPARC_WDISP30: |
| 544 | case R_SPARC_WDISP22: |
| 545 | case R_SPARC_WDISP19: |
| 546 | case R_SPARC_WDISP16: |
| 547 | if (h != NULL) |
| 548 | h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF; |
| 549 | |
| 550 | /* If we are linking with -Bsymbolic, we do not need to copy |
| 551 | a PC relative reloc against a global symbol which is |
| 552 | defined in an object we are including in the link (i.e., |
| 553 | DEF_REGULAR is set). FIXME: At this point we have not |
| 554 | seen all the input files, so it is possible that |
| 555 | DEF_REGULAR is not set now but will be set later (it is |
| 556 | never cleared). This needs to be handled as in |
| 557 | elf32-i386.c. */ |
| 558 | if (h == NULL |
| 559 | || (info->symbolic |
| 560 | && (h->elf_link_hash_flags |
| 561 | & ELF_LINK_HASH_DEF_REGULAR) != 0)) |
| 562 | break; |
| 563 | /* Fall through. */ |
| 564 | case R_SPARC_8: |
| 565 | case R_SPARC_16: |
| 566 | case R_SPARC_32: |
| 567 | case R_SPARC_HI22: |
| 568 | case R_SPARC_22: |
| 569 | case R_SPARC_13: |
| 570 | case R_SPARC_LO10: |
| 571 | case R_SPARC_UA16: |
| 572 | case R_SPARC_UA32: |
| 573 | if (h != NULL) |
| 574 | h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF; |
| 575 | |
| 576 | r_sparc_plt32: |
| 577 | if (info->shared && (sec->flags & SEC_ALLOC)) |
| 578 | { |
| 579 | /* When creating a shared object, we must copy these |
| 580 | relocs into the output file. We create a reloc |
| 581 | section in dynobj and make room for the reloc. */ |
| 582 | if (sreloc == NULL) |
| 583 | { |
| 584 | const char *name; |
| 585 | |
| 586 | name = (bfd_elf_string_from_elf_section |
| 587 | (abfd, |
| 588 | elf_elfheader (abfd)->e_shstrndx, |
| 589 | elf_section_data (sec)->rel_hdr.sh_name)); |
| 590 | if (name == NULL) |
| 591 | return false; |
| 592 | |
| 593 | BFD_ASSERT (strncmp (name, ".rela", 5) == 0 |
| 594 | && strcmp (bfd_get_section_name (abfd, sec), |
| 595 | name + 5) == 0); |
| 596 | |
| 597 | sreloc = bfd_get_section_by_name (dynobj, name); |
| 598 | if (sreloc == NULL) |
| 599 | { |
| 600 | flagword flags; |
| 601 | |
| 602 | sreloc = bfd_make_section (dynobj, name); |
| 603 | flags = (SEC_HAS_CONTENTS | SEC_READONLY |
| 604 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); |
| 605 | if ((sec->flags & SEC_ALLOC) != 0) |
| 606 | flags |= SEC_ALLOC | SEC_LOAD; |
| 607 | if (sreloc == NULL |
| 608 | || ! bfd_set_section_flags (dynobj, sreloc, flags) |
| 609 | || ! bfd_set_section_alignment (dynobj, sreloc, 2)) |
| 610 | return false; |
| 611 | } |
| 612 | if (sec->flags & SEC_READONLY) |
| 613 | info->flags |= DF_TEXTREL; |
| 614 | } |
| 615 | |
| 616 | sreloc->_raw_size += sizeof (Elf32_External_Rela); |
| 617 | } |
| 618 | |
| 619 | break; |
| 620 | |
| 621 | case R_SPARC_GNU_VTINHERIT: |
| 622 | if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
| 623 | return false; |
| 624 | break; |
| 625 | |
| 626 | case R_SPARC_GNU_VTENTRY: |
| 627 | if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
| 628 | return false; |
| 629 | break; |
| 630 | |
| 631 | default: |
| 632 | break; |
| 633 | } |
| 634 | } |
| 635 | |
| 636 | return true; |
| 637 | } |
| 638 | |
| 639 | static asection * |
| 640 | elf32_sparc_gc_mark_hook (abfd, info, rel, h, sym) |
| 641 | bfd *abfd; |
| 642 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
| 643 | Elf_Internal_Rela *rel; |
| 644 | struct elf_link_hash_entry *h; |
| 645 | Elf_Internal_Sym *sym; |
| 646 | { |
| 647 | |
| 648 | if (h != NULL) |
| 649 | { |
| 650 | switch (ELF32_R_TYPE (rel->r_info)) |
| 651 | { |
| 652 | case R_SPARC_GNU_VTINHERIT: |
| 653 | case R_SPARC_GNU_VTENTRY: |
| 654 | break; |
| 655 | |
| 656 | default: |
| 657 | switch (h->root.type) |
| 658 | { |
| 659 | case bfd_link_hash_defined: |
| 660 | case bfd_link_hash_defweak: |
| 661 | return h->root.u.def.section; |
| 662 | |
| 663 | case bfd_link_hash_common: |
| 664 | return h->root.u.c.p->section; |
| 665 | |
| 666 | default: |
| 667 | break; |
| 668 | } |
| 669 | } |
| 670 | } |
| 671 | else |
| 672 | { |
| 673 | return bfd_section_from_elf_index (abfd, sym->st_shndx); |
| 674 | } |
| 675 | |
| 676 | return NULL; |
| 677 | } |
| 678 | |
| 679 | /* Update the got entry reference counts for the section being removed. */ |
| 680 | static boolean |
| 681 | elf32_sparc_gc_sweep_hook (abfd, info, sec, relocs) |
| 682 | bfd *abfd; |
| 683 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
| 684 | asection *sec; |
| 685 | const Elf_Internal_Rela *relocs; |
| 686 | { |
| 687 | |
| 688 | Elf_Internal_Shdr *symtab_hdr; |
| 689 | struct elf_link_hash_entry **sym_hashes; |
| 690 | bfd_signed_vma *local_got_refcounts; |
| 691 | const Elf_Internal_Rela *rel, *relend; |
| 692 | unsigned long r_symndx; |
| 693 | struct elf_link_hash_entry *h; |
| 694 | |
| 695 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| 696 | sym_hashes = elf_sym_hashes (abfd); |
| 697 | local_got_refcounts = elf_local_got_refcounts (abfd); |
| 698 | |
| 699 | relend = relocs + sec->reloc_count; |
| 700 | for (rel = relocs; rel < relend; rel++) |
| 701 | switch (ELF32_R_TYPE (rel->r_info)) |
| 702 | { |
| 703 | case R_SPARC_GOT10: |
| 704 | case R_SPARC_GOT13: |
| 705 | case R_SPARC_GOT22: |
| 706 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 707 | if (r_symndx >= symtab_hdr->sh_info) |
| 708 | { |
| 709 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 710 | if (h->got.refcount > 0) |
| 711 | h->got.refcount--; |
| 712 | } |
| 713 | else |
| 714 | { |
| 715 | if (local_got_refcounts[r_symndx] > 0) |
| 716 | local_got_refcounts[r_symndx]--; |
| 717 | } |
| 718 | break; |
| 719 | |
| 720 | case R_SPARC_PLT32: |
| 721 | case R_SPARC_HIPLT22: |
| 722 | case R_SPARC_LOPLT10: |
| 723 | case R_SPARC_PCPLT32: |
| 724 | case R_SPARC_PCPLT10: |
| 725 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 726 | if (r_symndx >= symtab_hdr->sh_info) |
| 727 | { |
| 728 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 729 | if (h->plt.refcount > 0) |
| 730 | h->plt.refcount--; |
| 731 | } |
| 732 | break; |
| 733 | |
| 734 | default: |
| 735 | break; |
| 736 | } |
| 737 | |
| 738 | return true; |
| 739 | } |
| 740 | |
| 741 | /* Adjust a symbol defined by a dynamic object and referenced by a |
| 742 | regular object. The current definition is in some section of the |
| 743 | dynamic object, but we're not including those sections. We have to |
| 744 | change the definition to something the rest of the link can |
| 745 | understand. */ |
| 746 | |
| 747 | static boolean |
| 748 | elf32_sparc_adjust_dynamic_symbol (info, h) |
| 749 | struct bfd_link_info *info; |
| 750 | struct elf_link_hash_entry *h; |
| 751 | { |
| 752 | bfd *dynobj; |
| 753 | asection *s; |
| 754 | unsigned int power_of_two; |
| 755 | |
| 756 | dynobj = elf_hash_table (info)->dynobj; |
| 757 | |
| 758 | /* Make sure we know what is going on here. */ |
| 759 | BFD_ASSERT (dynobj != NULL |
| 760 | && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) |
| 761 | || h->weakdef != NULL |
| 762 | || ((h->elf_link_hash_flags |
| 763 | & ELF_LINK_HASH_DEF_DYNAMIC) != 0 |
| 764 | && (h->elf_link_hash_flags |
| 765 | & ELF_LINK_HASH_REF_REGULAR) != 0 |
| 766 | && (h->elf_link_hash_flags |
| 767 | & ELF_LINK_HASH_DEF_REGULAR) == 0))); |
| 768 | |
| 769 | /* If this is a function, put it in the procedure linkage table. We |
| 770 | will fill in the contents of the procedure linkage table later |
| 771 | (although we could actually do it here). The STT_NOTYPE |
| 772 | condition is a hack specifically for the Oracle libraries |
| 773 | delivered for Solaris; for some inexplicable reason, they define |
| 774 | some of their functions as STT_NOTYPE when they really should be |
| 775 | STT_FUNC. */ |
| 776 | if (h->type == STT_FUNC |
| 777 | || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0 |
| 778 | || (h->type == STT_NOTYPE |
| 779 | && (h->root.type == bfd_link_hash_defined |
| 780 | || h->root.type == bfd_link_hash_defweak) |
| 781 | && (h->root.u.def.section->flags & SEC_CODE) != 0)) |
| 782 | { |
| 783 | if (! elf_hash_table (info)->dynamic_sections_created |
| 784 | || ((!info->shared || info->symbolic || h->dynindx == -1) |
| 785 | && (h->elf_link_hash_flags |
| 786 | & ELF_LINK_HASH_DEF_REGULAR) != 0)) |
| 787 | { |
| 788 | /* This case can occur if we saw a WPLT30 reloc in an input |
| 789 | file, but none of the input files were dynamic objects. |
| 790 | Or, when linking the main application or a -Bsymbolic |
| 791 | shared library against PIC code. Or when a global symbol |
| 792 | has been made private, e.g. via versioning. |
| 793 | |
| 794 | In these cases we know what value the symbol will resolve |
| 795 | to, so we don't actually need to build a procedure linkage |
| 796 | table, and we can just do a WDISP30 reloc instead. */ |
| 797 | |
| 798 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; |
| 799 | return true; |
| 800 | } |
| 801 | |
| 802 | s = bfd_get_section_by_name (dynobj, ".plt"); |
| 803 | BFD_ASSERT (s != NULL); |
| 804 | |
| 805 | /* The first four entries in .plt are reserved. */ |
| 806 | if (s->_raw_size == 0) |
| 807 | s->_raw_size = 4 * PLT_ENTRY_SIZE; |
| 808 | |
| 809 | /* The procedure linkage table has a maximum size. */ |
| 810 | if (s->_raw_size >= 0x400000) |
| 811 | { |
| 812 | bfd_set_error (bfd_error_bad_value); |
| 813 | return false; |
| 814 | } |
| 815 | |
| 816 | /* If this symbol is not defined in a regular file, and we are |
| 817 | not generating a shared library, then set the symbol to this |
| 818 | location in the .plt. This is required to make function |
| 819 | pointers compare as equal between the normal executable and |
| 820 | the shared library. */ |
| 821 | if (! info->shared |
| 822 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) |
| 823 | { |
| 824 | h->root.u.def.section = s; |
| 825 | h->root.u.def.value = s->_raw_size; |
| 826 | } |
| 827 | |
| 828 | h->plt.offset = s->_raw_size; |
| 829 | |
| 830 | /* Make room for this entry. */ |
| 831 | s->_raw_size += PLT_ENTRY_SIZE; |
| 832 | |
| 833 | /* We also need to make an entry in the .rela.plt section. */ |
| 834 | |
| 835 | s = bfd_get_section_by_name (dynobj, ".rela.plt"); |
| 836 | BFD_ASSERT (s != NULL); |
| 837 | s->_raw_size += sizeof (Elf32_External_Rela); |
| 838 | |
| 839 | return true; |
| 840 | } |
| 841 | |
| 842 | /* If this is a weak symbol, and there is a real definition, the |
| 843 | processor independent code will have arranged for us to see the |
| 844 | real definition first, and we can just use the same value. */ |
| 845 | if (h->weakdef != NULL) |
| 846 | { |
| 847 | BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined |
| 848 | || h->weakdef->root.type == bfd_link_hash_defweak); |
| 849 | h->root.u.def.section = h->weakdef->root.u.def.section; |
| 850 | h->root.u.def.value = h->weakdef->root.u.def.value; |
| 851 | return true; |
| 852 | } |
| 853 | |
| 854 | /* This is a reference to a symbol defined by a dynamic object which |
| 855 | is not a function. */ |
| 856 | |
| 857 | /* If we are creating a shared library, we must presume that the |
| 858 | only references to the symbol are via the global offset table. |
| 859 | For such cases we need not do anything here; the relocations will |
| 860 | be handled correctly by relocate_section. */ |
| 861 | if (info->shared) |
| 862 | return true; |
| 863 | |
| 864 | /* If there are no references to this symbol that do not use the |
| 865 | GOT, we don't need to generate a copy reloc. */ |
| 866 | if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0) |
| 867 | return true; |
| 868 | |
| 869 | /* We must allocate the symbol in our .dynbss section, which will |
| 870 | become part of the .bss section of the executable. There will be |
| 871 | an entry for this symbol in the .dynsym section. The dynamic |
| 872 | object will contain position independent code, so all references |
| 873 | from the dynamic object to this symbol will go through the global |
| 874 | offset table. The dynamic linker will use the .dynsym entry to |
| 875 | determine the address it must put in the global offset table, so |
| 876 | both the dynamic object and the regular object will refer to the |
| 877 | same memory location for the variable. */ |
| 878 | |
| 879 | s = bfd_get_section_by_name (dynobj, ".dynbss"); |
| 880 | BFD_ASSERT (s != NULL); |
| 881 | |
| 882 | /* We must generate a R_SPARC_COPY reloc to tell the dynamic linker |
| 883 | to copy the initial value out of the dynamic object and into the |
| 884 | runtime process image. We need to remember the offset into the |
| 885 | .rel.bss section we are going to use. */ |
| 886 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) |
| 887 | { |
| 888 | asection *srel; |
| 889 | |
| 890 | srel = bfd_get_section_by_name (dynobj, ".rela.bss"); |
| 891 | BFD_ASSERT (srel != NULL); |
| 892 | srel->_raw_size += sizeof (Elf32_External_Rela); |
| 893 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY; |
| 894 | } |
| 895 | |
| 896 | /* We need to figure out the alignment required for this symbol. I |
| 897 | have no idea how ELF linkers handle this. */ |
| 898 | power_of_two = bfd_log2 (h->size); |
| 899 | if (power_of_two > 3) |
| 900 | power_of_two = 3; |
| 901 | |
| 902 | /* Apply the required alignment. */ |
| 903 | s->_raw_size = BFD_ALIGN (s->_raw_size, |
| 904 | (bfd_size_type) (1 << power_of_two)); |
| 905 | if (power_of_two > bfd_get_section_alignment (dynobj, s)) |
| 906 | { |
| 907 | if (! bfd_set_section_alignment (dynobj, s, power_of_two)) |
| 908 | return false; |
| 909 | } |
| 910 | |
| 911 | /* Define the symbol as being at this point in the section. */ |
| 912 | h->root.u.def.section = s; |
| 913 | h->root.u.def.value = s->_raw_size; |
| 914 | |
| 915 | /* Increment the section size to make room for the symbol. */ |
| 916 | s->_raw_size += h->size; |
| 917 | |
| 918 | return true; |
| 919 | } |
| 920 | |
| 921 | /* Set the sizes of the dynamic sections. */ |
| 922 | |
| 923 | static boolean |
| 924 | elf32_sparc_size_dynamic_sections (output_bfd, info) |
| 925 | bfd *output_bfd ATTRIBUTE_UNUSED; |
| 926 | struct bfd_link_info *info; |
| 927 | { |
| 928 | bfd *dynobj; |
| 929 | asection *s; |
| 930 | boolean relplt; |
| 931 | |
| 932 | dynobj = elf_hash_table (info)->dynobj; |
| 933 | BFD_ASSERT (dynobj != NULL); |
| 934 | |
| 935 | if (elf_hash_table (info)->dynamic_sections_created) |
| 936 | { |
| 937 | /* Set the contents of the .interp section to the interpreter. */ |
| 938 | if (! info->shared) |
| 939 | { |
| 940 | s = bfd_get_section_by_name (dynobj, ".interp"); |
| 941 | BFD_ASSERT (s != NULL); |
| 942 | s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER; |
| 943 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
| 944 | } |
| 945 | |
| 946 | /* Make space for the trailing nop in .plt. */ |
| 947 | s = bfd_get_section_by_name (dynobj, ".plt"); |
| 948 | BFD_ASSERT (s != NULL); |
| 949 | if (s->_raw_size > 0) |
| 950 | s->_raw_size += 4; |
| 951 | } |
| 952 | else |
| 953 | { |
| 954 | /* We may have created entries in the .rela.got section. |
| 955 | However, if we are not creating the dynamic sections, we will |
| 956 | not actually use these entries. Reset the size of .rela.got, |
| 957 | which will cause it to get stripped from the output file |
| 958 | below. */ |
| 959 | s = bfd_get_section_by_name (dynobj, ".rela.got"); |
| 960 | if (s != NULL) |
| 961 | s->_raw_size = 0; |
| 962 | } |
| 963 | |
| 964 | /* The check_relocs and adjust_dynamic_symbol entry points have |
| 965 | determined the sizes of the various dynamic sections. Allocate |
| 966 | memory for them. */ |
| 967 | relplt = false; |
| 968 | for (s = dynobj->sections; s != NULL; s = s->next) |
| 969 | { |
| 970 | const char *name; |
| 971 | boolean strip; |
| 972 | |
| 973 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
| 974 | continue; |
| 975 | |
| 976 | /* It's OK to base decisions on the section name, because none |
| 977 | of the dynobj section names depend upon the input files. */ |
| 978 | name = bfd_get_section_name (dynobj, s); |
| 979 | |
| 980 | strip = false; |
| 981 | |
| 982 | if (strncmp (name, ".rela", 5) == 0) |
| 983 | { |
| 984 | if (s->_raw_size == 0) |
| 985 | { |
| 986 | /* If we don't need this section, strip it from the |
| 987 | output file. This is to handle .rela.bss and |
| 988 | .rel.plt. We must create it in |
| 989 | create_dynamic_sections, because it must be created |
| 990 | before the linker maps input sections to output |
| 991 | sections. The linker does that before |
| 992 | adjust_dynamic_symbol is called, and it is that |
| 993 | function which decides whether anything needs to go |
| 994 | into these sections. */ |
| 995 | strip = true; |
| 996 | } |
| 997 | else |
| 998 | { |
| 999 | if (strcmp (name, ".rela.plt") == 0) |
| 1000 | relplt = true; |
| 1001 | |
| 1002 | /* We use the reloc_count field as a counter if we need |
| 1003 | to copy relocs into the output file. */ |
| 1004 | s->reloc_count = 0; |
| 1005 | } |
| 1006 | } |
| 1007 | else if (strcmp (name, ".plt") != 0 |
| 1008 | && strcmp (name, ".got") != 0) |
| 1009 | { |
| 1010 | /* It's not one of our sections, so don't allocate space. */ |
| 1011 | continue; |
| 1012 | } |
| 1013 | |
| 1014 | if (strip) |
| 1015 | { |
| 1016 | _bfd_strip_section_from_output (info, s); |
| 1017 | continue; |
| 1018 | } |
| 1019 | |
| 1020 | /* Allocate memory for the section contents. */ |
| 1021 | /* FIXME: This should be a call to bfd_alloc not bfd_zalloc. |
| 1022 | Unused entries should be reclaimed before the section's contents |
| 1023 | are written out, but at the moment this does not happen. Thus in |
| 1024 | order to prevent writing out garbage, we initialise the section's |
| 1025 | contents to zero. */ |
| 1026 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size); |
| 1027 | if (s->contents == NULL && s->_raw_size != 0) |
| 1028 | return false; |
| 1029 | } |
| 1030 | |
| 1031 | if (elf_hash_table (info)->dynamic_sections_created) |
| 1032 | { |
| 1033 | /* Add some entries to the .dynamic section. We fill in the |
| 1034 | values later, in elf32_sparc_finish_dynamic_sections, but we |
| 1035 | must add the entries now so that we get the correct size for |
| 1036 | the .dynamic section. The DT_DEBUG entry is filled in by the |
| 1037 | dynamic linker and used by the debugger. */ |
| 1038 | #define add_dynamic_entry(TAG, VAL) \ |
| 1039 | bfd_elf32_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL)) |
| 1040 | |
| 1041 | if (!info->shared) |
| 1042 | { |
| 1043 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
| 1044 | return false; |
| 1045 | } |
| 1046 | |
| 1047 | if (relplt) |
| 1048 | { |
| 1049 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
| 1050 | || !add_dynamic_entry (DT_PLTRELSZ, 0) |
| 1051 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) |
| 1052 | || !add_dynamic_entry (DT_JMPREL, 0)) |
| 1053 | return false; |
| 1054 | } |
| 1055 | |
| 1056 | if (!add_dynamic_entry (DT_RELA, 0) |
| 1057 | || !add_dynamic_entry (DT_RELASZ, 0) |
| 1058 | || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela))) |
| 1059 | return false; |
| 1060 | |
| 1061 | if (info->flags & DF_TEXTREL) |
| 1062 | { |
| 1063 | if (!add_dynamic_entry (DT_TEXTREL, 0)) |
| 1064 | return false; |
| 1065 | } |
| 1066 | } |
| 1067 | #undef add_dynamic_entry |
| 1068 | |
| 1069 | return true; |
| 1070 | } |
| 1071 | |
| 1072 | #define SET_SEC_DO_RELAX(section) do { elf_section_data(section)->tdata = (void *)1; } while (0) |
| 1073 | #define SEC_DO_RELAX(section) (elf_section_data(section)->tdata == (void *)1) |
| 1074 | |
| 1075 | static boolean |
| 1076 | elf32_sparc_relax_section (abfd, section, link_info, again) |
| 1077 | bfd *abfd ATTRIBUTE_UNUSED; |
| 1078 | asection *section ATTRIBUTE_UNUSED; |
| 1079 | struct bfd_link_info *link_info ATTRIBUTE_UNUSED; |
| 1080 | boolean *again; |
| 1081 | { |
| 1082 | *again = false; |
| 1083 | SET_SEC_DO_RELAX (section); |
| 1084 | return true; |
| 1085 | } |
| 1086 | |
| 1087 | /* This is the condition under which finish_dynamic_symbol will be called |
| 1088 | from elflink.h. If elflink.h doesn't call our finish_dynamic_symbol |
| 1089 | routine, we'll need to do something about initializing any .plt and .got |
| 1090 | entries in relocate_section. */ |
| 1091 | #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, INFO, H) \ |
| 1092 | ((DYN) \ |
| 1093 | && ((INFO)->shared \ |
| 1094 | || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \ |
| 1095 | && ((H)->dynindx != -1 \ |
| 1096 | || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0)) |
| 1097 | |
| 1098 | /* Relocate a SPARC ELF section. */ |
| 1099 | |
| 1100 | static boolean |
| 1101 | elf32_sparc_relocate_section (output_bfd, info, input_bfd, input_section, |
| 1102 | contents, relocs, local_syms, local_sections) |
| 1103 | bfd *output_bfd; |
| 1104 | struct bfd_link_info *info; |
| 1105 | bfd *input_bfd; |
| 1106 | asection *input_section; |
| 1107 | bfd_byte *contents; |
| 1108 | Elf_Internal_Rela *relocs; |
| 1109 | Elf_Internal_Sym *local_syms; |
| 1110 | asection **local_sections; |
| 1111 | { |
| 1112 | bfd *dynobj; |
| 1113 | Elf_Internal_Shdr *symtab_hdr; |
| 1114 | struct elf_link_hash_entry **sym_hashes; |
| 1115 | bfd_vma *local_got_offsets; |
| 1116 | bfd_vma got_base; |
| 1117 | asection *sgot; |
| 1118 | asection *splt; |
| 1119 | asection *sreloc; |
| 1120 | Elf_Internal_Rela *rel; |
| 1121 | Elf_Internal_Rela *relend; |
| 1122 | |
| 1123 | dynobj = elf_hash_table (info)->dynobj; |
| 1124 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| 1125 | sym_hashes = elf_sym_hashes (input_bfd); |
| 1126 | local_got_offsets = elf_local_got_offsets (input_bfd); |
| 1127 | |
| 1128 | if (elf_hash_table (info)->hgot == NULL) |
| 1129 | got_base = 0; |
| 1130 | else |
| 1131 | got_base = elf_hash_table (info)->hgot->root.u.def.value; |
| 1132 | |
| 1133 | sgot = NULL; |
| 1134 | splt = NULL; |
| 1135 | sreloc = NULL; |
| 1136 | |
| 1137 | rel = relocs; |
| 1138 | relend = relocs + input_section->reloc_count; |
| 1139 | for (; rel < relend; rel++) |
| 1140 | { |
| 1141 | int r_type; |
| 1142 | reloc_howto_type *howto; |
| 1143 | unsigned long r_symndx; |
| 1144 | struct elf_link_hash_entry *h; |
| 1145 | Elf_Internal_Sym *sym; |
| 1146 | asection *sec; |
| 1147 | bfd_vma relocation, off; |
| 1148 | bfd_reloc_status_type r; |
| 1149 | boolean is_plt = false; |
| 1150 | boolean unresolved_reloc; |
| 1151 | |
| 1152 | r_type = ELF32_R_TYPE (rel->r_info); |
| 1153 | |
| 1154 | if (r_type == R_SPARC_GNU_VTINHERIT |
| 1155 | || r_type == R_SPARC_GNU_VTENTRY) |
| 1156 | continue; |
| 1157 | |
| 1158 | if (r_type < 0 || r_type >= (int) R_SPARC_max_std) |
| 1159 | { |
| 1160 | bfd_set_error (bfd_error_bad_value); |
| 1161 | return false; |
| 1162 | } |
| 1163 | howto = _bfd_sparc_elf_howto_table + r_type; |
| 1164 | |
| 1165 | r_symndx = ELF32_R_SYM (rel->r_info); |
| 1166 | |
| 1167 | if (info->relocateable) |
| 1168 | { |
| 1169 | /* This is a relocateable link. We don't have to change |
| 1170 | anything, unless the reloc is against a section symbol, |
| 1171 | in which case we have to adjust according to where the |
| 1172 | section symbol winds up in the output section. */ |
| 1173 | if (r_symndx < symtab_hdr->sh_info) |
| 1174 | { |
| 1175 | sym = local_syms + r_symndx; |
| 1176 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) |
| 1177 | { |
| 1178 | sec = local_sections[r_symndx]; |
| 1179 | rel->r_addend += sec->output_offset + sym->st_value; |
| 1180 | } |
| 1181 | } |
| 1182 | |
| 1183 | continue; |
| 1184 | } |
| 1185 | |
| 1186 | /* This is a final link. */ |
| 1187 | h = NULL; |
| 1188 | sym = NULL; |
| 1189 | sec = NULL; |
| 1190 | unresolved_reloc = false; |
| 1191 | if (r_symndx < symtab_hdr->sh_info) |
| 1192 | { |
| 1193 | sym = local_syms + r_symndx; |
| 1194 | sec = local_sections[r_symndx]; |
| 1195 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel); |
| 1196 | } |
| 1197 | else |
| 1198 | { |
| 1199 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| 1200 | while (h->root.type == bfd_link_hash_indirect |
| 1201 | || h->root.type == bfd_link_hash_warning) |
| 1202 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| 1203 | |
| 1204 | relocation = 0; |
| 1205 | if (h->root.type == bfd_link_hash_defined |
| 1206 | || h->root.type == bfd_link_hash_defweak) |
| 1207 | { |
| 1208 | sec = h->root.u.def.section; |
| 1209 | if (sec->output_section == NULL) |
| 1210 | /* Set a flag that will be cleared later if we find a |
| 1211 | relocation value for this symbol. output_section |
| 1212 | is typically NULL for symbols satisfied by a shared |
| 1213 | library. */ |
| 1214 | unresolved_reloc = true; |
| 1215 | else |
| 1216 | relocation = (h->root.u.def.value |
| 1217 | + sec->output_section->vma |
| 1218 | + sec->output_offset); |
| 1219 | } |
| 1220 | else if (h->root.type == bfd_link_hash_undefweak) |
| 1221 | ; |
| 1222 | else if (info->shared |
| 1223 | && (!info->symbolic || info->allow_shlib_undefined) |
| 1224 | && !info->no_undefined |
| 1225 | && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) |
| 1226 | ; |
| 1227 | else |
| 1228 | { |
| 1229 | if (! ((*info->callbacks->undefined_symbol) |
| 1230 | (info, h->root.root.string, input_bfd, |
| 1231 | input_section, rel->r_offset, |
| 1232 | (!info->shared || info->no_undefined |
| 1233 | || ELF_ST_VISIBILITY (h->other))))) |
| 1234 | return false; |
| 1235 | } |
| 1236 | } |
| 1237 | |
| 1238 | switch (r_type) |
| 1239 | { |
| 1240 | case R_SPARC_GOT10: |
| 1241 | case R_SPARC_GOT13: |
| 1242 | case R_SPARC_GOT22: |
| 1243 | /* Relocation is to the entry for this symbol in the global |
| 1244 | offset table. */ |
| 1245 | if (sgot == NULL) |
| 1246 | { |
| 1247 | sgot = bfd_get_section_by_name (dynobj, ".got"); |
| 1248 | BFD_ASSERT (sgot != NULL); |
| 1249 | } |
| 1250 | |
| 1251 | if (h != NULL) |
| 1252 | { |
| 1253 | boolean dyn; |
| 1254 | |
| 1255 | off = h->got.offset; |
| 1256 | BFD_ASSERT (off != (bfd_vma) -1); |
| 1257 | dyn = elf_hash_table (info)->dynamic_sections_created; |
| 1258 | |
| 1259 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h) |
| 1260 | || (info->shared |
| 1261 | && (info->symbolic |
| 1262 | || h->dynindx == -1 |
| 1263 | || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL)) |
| 1264 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))) |
| 1265 | { |
| 1266 | /* This is actually a static link, or it is a |
| 1267 | -Bsymbolic link and the symbol is defined |
| 1268 | locally, or the symbol was forced to be local |
| 1269 | because of a version file. We must initialize |
| 1270 | this entry in the global offset table. Since the |
| 1271 | offset must always be a multiple of 4, we use the |
| 1272 | least significant bit to record whether we have |
| 1273 | initialized it already. |
| 1274 | |
| 1275 | When doing a dynamic link, we create a .rela.got |
| 1276 | relocation entry to initialize the value. This |
| 1277 | is done in the finish_dynamic_symbol routine. */ |
| 1278 | if ((off & 1) != 0) |
| 1279 | off &= ~1; |
| 1280 | else |
| 1281 | { |
| 1282 | bfd_put_32 (output_bfd, relocation, |
| 1283 | sgot->contents + off); |
| 1284 | h->got.offset |= 1; |
| 1285 | } |
| 1286 | } |
| 1287 | else |
| 1288 | unresolved_reloc = false; |
| 1289 | } |
| 1290 | else |
| 1291 | { |
| 1292 | BFD_ASSERT (local_got_offsets != NULL |
| 1293 | && local_got_offsets[r_symndx] != (bfd_vma) -1); |
| 1294 | |
| 1295 | off = local_got_offsets[r_symndx]; |
| 1296 | |
| 1297 | /* The offset must always be a multiple of 4. We use |
| 1298 | the least significant bit to record whether we have |
| 1299 | already processed this entry. */ |
| 1300 | if ((off & 1) != 0) |
| 1301 | off &= ~1; |
| 1302 | else |
| 1303 | { |
| 1304 | bfd_put_32 (output_bfd, relocation, sgot->contents + off); |
| 1305 | |
| 1306 | if (info->shared) |
| 1307 | { |
| 1308 | asection *srelgot; |
| 1309 | Elf_Internal_Rela outrel; |
| 1310 | |
| 1311 | /* We need to generate a R_SPARC_RELATIVE reloc |
| 1312 | for the dynamic linker. */ |
| 1313 | srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); |
| 1314 | BFD_ASSERT (srelgot != NULL); |
| 1315 | |
| 1316 | outrel.r_offset = (sgot->output_section->vma |
| 1317 | + sgot->output_offset |
| 1318 | + off); |
| 1319 | outrel.r_info = ELF32_R_INFO (0, R_SPARC_RELATIVE); |
| 1320 | outrel.r_addend = 0; |
| 1321 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, |
| 1322 | (((Elf32_External_Rela *) |
| 1323 | srelgot->contents) |
| 1324 | + srelgot->reloc_count)); |
| 1325 | ++srelgot->reloc_count; |
| 1326 | } |
| 1327 | |
| 1328 | local_got_offsets[r_symndx] |= 1; |
| 1329 | } |
| 1330 | } |
| 1331 | relocation = sgot->output_offset + off - got_base; |
| 1332 | break; |
| 1333 | |
| 1334 | case R_SPARC_PLT32: |
| 1335 | if (h == NULL || h->plt.offset == (bfd_vma) -1) |
| 1336 | { |
| 1337 | r_type = R_SPARC_32; |
| 1338 | goto r_sparc_plt32; |
| 1339 | } |
| 1340 | /* Fall through. */ |
| 1341 | case R_SPARC_WPLT30: |
| 1342 | /* Relocation is to the entry for this symbol in the |
| 1343 | procedure linkage table. */ |
| 1344 | |
| 1345 | /* The Solaris native assembler will generate a WPLT30 reloc |
| 1346 | for a local symbol if you assemble a call from one |
| 1347 | section to another when using -K pic. We treat it as |
| 1348 | WDISP30. */ |
| 1349 | if (h == NULL) |
| 1350 | break; |
| 1351 | |
| 1352 | if (h->plt.offset == (bfd_vma) -1) |
| 1353 | { |
| 1354 | /* We didn't make a PLT entry for this symbol. This |
| 1355 | happens when statically linking PIC code, or when |
| 1356 | using -Bsymbolic. */ |
| 1357 | break; |
| 1358 | } |
| 1359 | |
| 1360 | if (splt == NULL) |
| 1361 | { |
| 1362 | splt = bfd_get_section_by_name (dynobj, ".plt"); |
| 1363 | BFD_ASSERT (splt != NULL); |
| 1364 | } |
| 1365 | |
| 1366 | relocation = (splt->output_section->vma |
| 1367 | + splt->output_offset |
| 1368 | + h->plt.offset); |
| 1369 | unresolved_reloc = false; |
| 1370 | if (r_type == R_SPARC_PLT32) |
| 1371 | { |
| 1372 | r_type = R_SPARC_32; |
| 1373 | is_plt = true; |
| 1374 | goto r_sparc_plt32; |
| 1375 | } |
| 1376 | break; |
| 1377 | |
| 1378 | case R_SPARC_PC10: |
| 1379 | case R_SPARC_PC22: |
| 1380 | if (h != NULL |
| 1381 | && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) |
| 1382 | break; |
| 1383 | /* Fall through. */ |
| 1384 | case R_SPARC_DISP8: |
| 1385 | case R_SPARC_DISP16: |
| 1386 | case R_SPARC_DISP32: |
| 1387 | case R_SPARC_WDISP30: |
| 1388 | case R_SPARC_WDISP22: |
| 1389 | case R_SPARC_WDISP19: |
| 1390 | case R_SPARC_WDISP16: |
| 1391 | if (h == NULL |
| 1392 | || (info->symbolic |
| 1393 | && (h->elf_link_hash_flags |
| 1394 | & ELF_LINK_HASH_DEF_REGULAR) != 0)) |
| 1395 | break; |
| 1396 | /* Fall through. */ |
| 1397 | case R_SPARC_8: |
| 1398 | case R_SPARC_16: |
| 1399 | case R_SPARC_32: |
| 1400 | case R_SPARC_HI22: |
| 1401 | case R_SPARC_22: |
| 1402 | case R_SPARC_13: |
| 1403 | case R_SPARC_LO10: |
| 1404 | case R_SPARC_UA16: |
| 1405 | case R_SPARC_UA32: |
| 1406 | r_sparc_plt32: |
| 1407 | if (info->shared |
| 1408 | && r_symndx != 0 |
| 1409 | && (input_section->flags & SEC_ALLOC)) |
| 1410 | { |
| 1411 | Elf_Internal_Rela outrel; |
| 1412 | boolean skip, relocate = false; |
| 1413 | |
| 1414 | /* When generating a shared object, these relocations |
| 1415 | are copied into the output file to be resolved at run |
| 1416 | time. */ |
| 1417 | |
| 1418 | if (sreloc == NULL) |
| 1419 | { |
| 1420 | const char *name; |
| 1421 | |
| 1422 | name = (bfd_elf_string_from_elf_section |
| 1423 | (input_bfd, |
| 1424 | elf_elfheader (input_bfd)->e_shstrndx, |
| 1425 | elf_section_data (input_section)->rel_hdr.sh_name)); |
| 1426 | if (name == NULL) |
| 1427 | return false; |
| 1428 | |
| 1429 | BFD_ASSERT (strncmp (name, ".rela", 5) == 0 |
| 1430 | && strcmp (bfd_get_section_name (input_bfd, |
| 1431 | input_section), |
| 1432 | name + 5) == 0); |
| 1433 | |
| 1434 | sreloc = bfd_get_section_by_name (dynobj, name); |
| 1435 | BFD_ASSERT (sreloc != NULL); |
| 1436 | } |
| 1437 | |
| 1438 | skip = false; |
| 1439 | |
| 1440 | outrel.r_offset = |
| 1441 | _bfd_elf_section_offset (output_bfd, info, input_section, |
| 1442 | rel->r_offset); |
| 1443 | if (outrel.r_offset == (bfd_vma) -1) |
| 1444 | skip = true; |
| 1445 | else if (outrel.r_offset == (bfd_vma) -2) |
| 1446 | skip = true, relocate = true; |
| 1447 | outrel.r_offset += (input_section->output_section->vma |
| 1448 | + input_section->output_offset); |
| 1449 | |
| 1450 | /* Optimize unaligned reloc usage now that we know where |
| 1451 | it finally resides. */ |
| 1452 | switch (r_type) |
| 1453 | { |
| 1454 | case R_SPARC_16: |
| 1455 | if (outrel.r_offset & 1) |
| 1456 | r_type = R_SPARC_UA16; |
| 1457 | break; |
| 1458 | case R_SPARC_UA16: |
| 1459 | if (!(outrel.r_offset & 1)) |
| 1460 | r_type = R_SPARC_16; |
| 1461 | break; |
| 1462 | case R_SPARC_32: |
| 1463 | if (outrel.r_offset & 3) |
| 1464 | r_type = R_SPARC_UA32; |
| 1465 | break; |
| 1466 | case R_SPARC_UA32: |
| 1467 | if (!(outrel.r_offset & 3)) |
| 1468 | r_type = R_SPARC_32; |
| 1469 | break; |
| 1470 | case R_SPARC_DISP8: |
| 1471 | case R_SPARC_DISP16: |
| 1472 | case R_SPARC_DISP32: |
| 1473 | /* If the symbol is not dynamic, we should not keep |
| 1474 | a dynamic relocation. But an .rela.* slot has been |
| 1475 | allocated for it, output R_SPARC_NONE. |
| 1476 | FIXME: Add code tracking needed dynamic relocs as |
| 1477 | e.g. i386 has. */ |
| 1478 | if (h->dynindx == -1) |
| 1479 | skip = true, relocate = true; |
| 1480 | break; |
| 1481 | } |
| 1482 | |
| 1483 | if (skip) |
| 1484 | memset (&outrel, 0, sizeof outrel); |
| 1485 | /* h->dynindx may be -1 if the symbol was marked to |
| 1486 | become local. */ |
| 1487 | else if (h != NULL && ! is_plt |
| 1488 | && ((! info->symbolic && h->dynindx != -1) |
| 1489 | || (h->elf_link_hash_flags |
| 1490 | & ELF_LINK_HASH_DEF_REGULAR) == 0)) |
| 1491 | { |
| 1492 | BFD_ASSERT (h->dynindx != -1); |
| 1493 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); |
| 1494 | outrel.r_addend = rel->r_addend; |
| 1495 | } |
| 1496 | else |
| 1497 | { |
| 1498 | if (r_type == R_SPARC_32) |
| 1499 | { |
| 1500 | outrel.r_info = ELF32_R_INFO (0, R_SPARC_RELATIVE); |
| 1501 | outrel.r_addend = relocation + rel->r_addend; |
| 1502 | } |
| 1503 | else |
| 1504 | { |
| 1505 | long indx; |
| 1506 | |
| 1507 | if (is_plt) |
| 1508 | sec = splt; |
| 1509 | else if (h == NULL) |
| 1510 | sec = local_sections[r_symndx]; |
| 1511 | else |
| 1512 | { |
| 1513 | BFD_ASSERT (h->root.type == bfd_link_hash_defined |
| 1514 | || (h->root.type |
| 1515 | == bfd_link_hash_defweak)); |
| 1516 | sec = h->root.u.def.section; |
| 1517 | } |
| 1518 | if (sec != NULL && bfd_is_abs_section (sec)) |
| 1519 | indx = 0; |
| 1520 | else if (sec == NULL || sec->owner == NULL) |
| 1521 | { |
| 1522 | bfd_set_error (bfd_error_bad_value); |
| 1523 | return false; |
| 1524 | } |
| 1525 | else |
| 1526 | { |
| 1527 | asection *osec; |
| 1528 | |
| 1529 | osec = sec->output_section; |
| 1530 | indx = elf_section_data (osec)->dynindx; |
| 1531 | |
| 1532 | /* FIXME: we really should be able to link non-pic |
| 1533 | shared libraries. */ |
| 1534 | if (indx == 0) |
| 1535 | { |
| 1536 | BFD_FAIL (); |
| 1537 | (*_bfd_error_handler) |
| 1538 | (_("%s: probably compiled without -fPIC?"), |
| 1539 | bfd_archive_filename (input_bfd)); |
| 1540 | bfd_set_error (bfd_error_bad_value); |
| 1541 | return false; |
| 1542 | } |
| 1543 | } |
| 1544 | |
| 1545 | outrel.r_info = ELF32_R_INFO (indx, r_type); |
| 1546 | outrel.r_addend = relocation + rel->r_addend; |
| 1547 | } |
| 1548 | } |
| 1549 | |
| 1550 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, |
| 1551 | (((Elf32_External_Rela *) |
| 1552 | sreloc->contents) |
| 1553 | + sreloc->reloc_count)); |
| 1554 | ++sreloc->reloc_count; |
| 1555 | |
| 1556 | /* This reloc will be computed at runtime, so there's no |
| 1557 | need to do anything now. */ |
| 1558 | if (! relocate) |
| 1559 | continue; |
| 1560 | } |
| 1561 | break; |
| 1562 | |
| 1563 | default: |
| 1564 | break; |
| 1565 | } |
| 1566 | |
| 1567 | /* ??? Copied from elf32-i386.c, debugging section check and all. */ |
| 1568 | if (unresolved_reloc |
| 1569 | && !(info->shared |
| 1570 | && (input_section->flags & SEC_DEBUGGING) != 0 |
| 1571 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0)) |
| 1572 | (*_bfd_error_handler) |
| 1573 | (_("%s(%s+0x%lx): unresolvable relocation against symbol `%s'"), |
| 1574 | bfd_archive_filename (input_bfd), |
| 1575 | bfd_get_section_name (input_bfd, input_section), |
| 1576 | (long) rel->r_offset, |
| 1577 | h->root.root.string); |
| 1578 | |
| 1579 | r = bfd_reloc_continue; |
| 1580 | if (r_type == R_SPARC_WDISP16) |
| 1581 | { |
| 1582 | bfd_vma x; |
| 1583 | |
| 1584 | relocation += rel->r_addend; |
| 1585 | relocation -= (input_section->output_section->vma |
| 1586 | + input_section->output_offset); |
| 1587 | relocation -= rel->r_offset; |
| 1588 | |
| 1589 | x = bfd_get_32 (input_bfd, contents + rel->r_offset); |
| 1590 | x |= ((((relocation >> 2) & 0xc000) << 6) |
| 1591 | | ((relocation >> 2) & 0x3fff)); |
| 1592 | bfd_put_32 (input_bfd, x, contents + rel->r_offset); |
| 1593 | |
| 1594 | if ((bfd_signed_vma) relocation < - 0x40000 |
| 1595 | || (bfd_signed_vma) relocation > 0x3ffff) |
| 1596 | r = bfd_reloc_overflow; |
| 1597 | else |
| 1598 | r = bfd_reloc_ok; |
| 1599 | } |
| 1600 | else if (r_type == R_SPARC_REV32) |
| 1601 | { |
| 1602 | bfd_vma x; |
| 1603 | |
| 1604 | relocation = relocation + rel->r_addend; |
| 1605 | |
| 1606 | x = bfd_get_32 (input_bfd, contents + rel->r_offset); |
| 1607 | x = x + relocation; |
| 1608 | bfd_putl32 (/*input_bfd,*/ x, contents + rel->r_offset); |
| 1609 | r = bfd_reloc_ok; |
| 1610 | } |
| 1611 | else if ((r_type == R_SPARC_WDISP30 || r_type == R_SPARC_WPLT30) |
| 1612 | && SEC_DO_RELAX (input_section) |
| 1613 | && rel->r_offset + 4 < input_section->_raw_size) |
| 1614 | { |
| 1615 | #define G0 0 |
| 1616 | #define O7 15 |
| 1617 | #define XCC (2 << 20) |
| 1618 | #define COND(x) (((x)&0xf)<<25) |
| 1619 | #define CONDA COND(0x8) |
| 1620 | #define INSN_BPA (F2(0,1) | CONDA | BPRED | XCC) |
| 1621 | #define INSN_BA (F2(0,2) | CONDA) |
| 1622 | #define INSN_OR F3(2, 0x2, 0) |
| 1623 | #define INSN_NOP F2(0,4) |
| 1624 | |
| 1625 | bfd_vma x, y; |
| 1626 | |
| 1627 | /* If the instruction is a call with either: |
| 1628 | restore |
| 1629 | arithmetic instruction with rd == %o7 |
| 1630 | where rs1 != %o7 and rs2 if it is register != %o7 |
| 1631 | then we can optimize if the call destination is near |
| 1632 | by changing the call into a branch always. */ |
| 1633 | x = bfd_get_32 (input_bfd, contents + rel->r_offset); |
| 1634 | y = bfd_get_32 (input_bfd, contents + rel->r_offset + 4); |
| 1635 | if ((x & OP(~0)) == OP(1) && (y & OP(~0)) == OP(2)) |
| 1636 | { |
| 1637 | if (((y & OP3(~0)) == OP3(0x3d) /* restore */ |
| 1638 | || ((y & OP3(0x28)) == 0 /* arithmetic */ |
| 1639 | && (y & RD(~0)) == RD(O7))) |
| 1640 | && (y & RS1(~0)) != RS1(O7) |
| 1641 | && ((y & F3I(~0)) |
| 1642 | || (y & RS2(~0)) != RS2(O7))) |
| 1643 | { |
| 1644 | bfd_vma reloc; |
| 1645 | |
| 1646 | reloc = relocation + rel->r_addend - rel->r_offset; |
| 1647 | reloc -= (input_section->output_section->vma |
| 1648 | + input_section->output_offset); |
| 1649 | |
| 1650 | /* Ensure the reloc fits into simm22. */ |
| 1651 | if ((reloc & 3) == 0 |
| 1652 | && ((reloc & ~(bfd_vma)0x7fffff) == 0 |
| 1653 | || ((reloc | 0x7fffff) == ~(bfd_vma)0))) |
| 1654 | { |
| 1655 | reloc >>= 2; |
| 1656 | |
| 1657 | /* Check whether it fits into simm19 on v9. */ |
| 1658 | if (((reloc & 0x3c0000) == 0 |
| 1659 | || (reloc & 0x3c0000) == 0x3c0000) |
| 1660 | && (elf_elfheader (output_bfd)->e_flags & EF_SPARC_32PLUS)) |
| 1661 | x = INSN_BPA | (reloc & 0x7ffff); /* ba,pt %xcc */ |
| 1662 | else |
| 1663 | x = INSN_BA | (reloc & 0x3fffff); /* ba */ |
| 1664 | bfd_put_32 (input_bfd, x, contents + rel->r_offset); |
| 1665 | r = bfd_reloc_ok; |
| 1666 | if (rel->r_offset >= 4 |
| 1667 | && (y & (0xffffffff ^ RS1(~0))) |
| 1668 | == (INSN_OR | RD(O7) | RS2(G0))) |
| 1669 | { |
| 1670 | bfd_vma z; |
| 1671 | unsigned int reg; |
| 1672 | |
| 1673 | z = bfd_get_32 (input_bfd, |
| 1674 | contents + rel->r_offset - 4); |
| 1675 | if ((z & (0xffffffff ^ RD(~0))) |
| 1676 | != (INSN_OR | RS1(O7) | RS2(G0))) |
| 1677 | break; |
| 1678 | |
| 1679 | /* The sequence was |
| 1680 | or %o7, %g0, %rN |
| 1681 | call foo |
| 1682 | or %rN, %g0, %o7 |
| 1683 | |
| 1684 | If call foo was replaced with ba, replace |
| 1685 | or %rN, %g0, %o7 with nop. */ |
| 1686 | |
| 1687 | reg = (y & RS1(~0)) >> 14; |
| 1688 | if (reg != ((z & RD(~0)) >> 25) |
| 1689 | || reg == G0 || reg == O7) |
| 1690 | break; |
| 1691 | |
| 1692 | bfd_put_32 (input_bfd, (bfd_vma) INSN_NOP, |
| 1693 | contents + rel->r_offset + 4); |
| 1694 | } |
| 1695 | |
| 1696 | } |
| 1697 | } |
| 1698 | } |
| 1699 | } |
| 1700 | |
| 1701 | if (r == bfd_reloc_continue) |
| 1702 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
| 1703 | contents, rel->r_offset, |
| 1704 | relocation, rel->r_addend); |
| 1705 | |
| 1706 | if (r != bfd_reloc_ok) |
| 1707 | { |
| 1708 | switch (r) |
| 1709 | { |
| 1710 | default: |
| 1711 | case bfd_reloc_outofrange: |
| 1712 | abort (); |
| 1713 | case bfd_reloc_overflow: |
| 1714 | { |
| 1715 | const char *name; |
| 1716 | |
| 1717 | if (h != NULL) |
| 1718 | name = h->root.root.string; |
| 1719 | else |
| 1720 | { |
| 1721 | name = bfd_elf_string_from_elf_section (input_bfd, |
| 1722 | symtab_hdr->sh_link, |
| 1723 | sym->st_name); |
| 1724 | if (name == NULL) |
| 1725 | return false; |
| 1726 | if (*name == '\0') |
| 1727 | name = bfd_section_name (input_bfd, sec); |
| 1728 | } |
| 1729 | if (! ((*info->callbacks->reloc_overflow) |
| 1730 | (info, name, howto->name, (bfd_vma) 0, |
| 1731 | input_bfd, input_section, rel->r_offset))) |
| 1732 | return false; |
| 1733 | } |
| 1734 | break; |
| 1735 | } |
| 1736 | } |
| 1737 | } |
| 1738 | |
| 1739 | return true; |
| 1740 | } |
| 1741 | |
| 1742 | /* Finish up dynamic symbol handling. We set the contents of various |
| 1743 | dynamic sections here. */ |
| 1744 | |
| 1745 | static boolean |
| 1746 | elf32_sparc_finish_dynamic_symbol (output_bfd, info, h, sym) |
| 1747 | bfd *output_bfd; |
| 1748 | struct bfd_link_info *info; |
| 1749 | struct elf_link_hash_entry *h; |
| 1750 | Elf_Internal_Sym *sym; |
| 1751 | { |
| 1752 | bfd *dynobj; |
| 1753 | |
| 1754 | dynobj = elf_hash_table (info)->dynobj; |
| 1755 | |
| 1756 | if (h->plt.offset != (bfd_vma) -1) |
| 1757 | { |
| 1758 | asection *splt; |
| 1759 | asection *srela; |
| 1760 | Elf_Internal_Rela rela; |
| 1761 | |
| 1762 | /* This symbol has an entry in the procedure linkage table. Set |
| 1763 | it up. */ |
| 1764 | |
| 1765 | BFD_ASSERT (h->dynindx != -1); |
| 1766 | |
| 1767 | splt = bfd_get_section_by_name (dynobj, ".plt"); |
| 1768 | srela = bfd_get_section_by_name (dynobj, ".rela.plt"); |
| 1769 | BFD_ASSERT (splt != NULL && srela != NULL); |
| 1770 | |
| 1771 | /* Fill in the entry in the procedure linkage table. */ |
| 1772 | bfd_put_32 (output_bfd, |
| 1773 | PLT_ENTRY_WORD0 + h->plt.offset, |
| 1774 | splt->contents + h->plt.offset); |
| 1775 | bfd_put_32 (output_bfd, |
| 1776 | (PLT_ENTRY_WORD1 |
| 1777 | + (((- (h->plt.offset + 4)) >> 2) & 0x3fffff)), |
| 1778 | splt->contents + h->plt.offset + 4); |
| 1779 | bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD2, |
| 1780 | splt->contents + h->plt.offset + 8); |
| 1781 | |
| 1782 | /* Fill in the entry in the .rela.plt section. */ |
| 1783 | rela.r_offset = (splt->output_section->vma |
| 1784 | + splt->output_offset |
| 1785 | + h->plt.offset); |
| 1786 | rela.r_info = ELF32_R_INFO (h->dynindx, R_SPARC_JMP_SLOT); |
| 1787 | rela.r_addend = 0; |
| 1788 | bfd_elf32_swap_reloca_out (output_bfd, &rela, |
| 1789 | ((Elf32_External_Rela *) srela->contents |
| 1790 | + h->plt.offset / PLT_ENTRY_SIZE - 4)); |
| 1791 | |
| 1792 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) |
| 1793 | { |
| 1794 | /* Mark the symbol as undefined, rather than as defined in |
| 1795 | the .plt section. Leave the value alone. */ |
| 1796 | sym->st_shndx = SHN_UNDEF; |
| 1797 | /* If the symbol is weak, we do need to clear the value. |
| 1798 | Otherwise, the PLT entry would provide a definition for |
| 1799 | the symbol even if the symbol wasn't defined anywhere, |
| 1800 | and so the symbol would never be NULL. */ |
| 1801 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR_NONWEAK) |
| 1802 | == 0) |
| 1803 | sym->st_value = 0; |
| 1804 | } |
| 1805 | } |
| 1806 | |
| 1807 | if (h->got.offset != (bfd_vma) -1) |
| 1808 | { |
| 1809 | asection *sgot; |
| 1810 | asection *srela; |
| 1811 | Elf_Internal_Rela rela; |
| 1812 | |
| 1813 | /* This symbol has an entry in the global offset table. Set it |
| 1814 | up. */ |
| 1815 | |
| 1816 | sgot = bfd_get_section_by_name (dynobj, ".got"); |
| 1817 | srela = bfd_get_section_by_name (dynobj, ".rela.got"); |
| 1818 | BFD_ASSERT (sgot != NULL && srela != NULL); |
| 1819 | |
| 1820 | rela.r_offset = (sgot->output_section->vma |
| 1821 | + sgot->output_offset |
| 1822 | + (h->got.offset &~ (bfd_vma) 1)); |
| 1823 | |
| 1824 | /* If this is a -Bsymbolic link, and the symbol is defined |
| 1825 | locally, we just want to emit a RELATIVE reloc. Likewise if |
| 1826 | the symbol was forced to be local because of a version file. |
| 1827 | The entry in the global offset table will already have been |
| 1828 | initialized in the relocate_section function. */ |
| 1829 | if (info->shared |
| 1830 | && (info->symbolic || h->dynindx == -1) |
| 1831 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)) |
| 1832 | rela.r_info = ELF32_R_INFO (0, R_SPARC_RELATIVE); |
| 1833 | else |
| 1834 | { |
| 1835 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset); |
| 1836 | rela.r_info = ELF32_R_INFO (h->dynindx, R_SPARC_GLOB_DAT); |
| 1837 | } |
| 1838 | |
| 1839 | rela.r_addend = 0; |
| 1840 | bfd_elf32_swap_reloca_out (output_bfd, &rela, |
| 1841 | ((Elf32_External_Rela *) srela->contents |
| 1842 | + srela->reloc_count)); |
| 1843 | ++srela->reloc_count; |
| 1844 | } |
| 1845 | |
| 1846 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0) |
| 1847 | { |
| 1848 | asection *s; |
| 1849 | Elf_Internal_Rela rela; |
| 1850 | |
| 1851 | /* This symbols needs a copy reloc. Set it up. */ |
| 1852 | |
| 1853 | BFD_ASSERT (h->dynindx != -1); |
| 1854 | |
| 1855 | s = bfd_get_section_by_name (h->root.u.def.section->owner, |
| 1856 | ".rela.bss"); |
| 1857 | BFD_ASSERT (s != NULL); |
| 1858 | |
| 1859 | rela.r_offset = (h->root.u.def.value |
| 1860 | + h->root.u.def.section->output_section->vma |
| 1861 | + h->root.u.def.section->output_offset); |
| 1862 | rela.r_info = ELF32_R_INFO (h->dynindx, R_SPARC_COPY); |
| 1863 | rela.r_addend = 0; |
| 1864 | bfd_elf32_swap_reloca_out (output_bfd, &rela, |
| 1865 | ((Elf32_External_Rela *) s->contents |
| 1866 | + s->reloc_count)); |
| 1867 | ++s->reloc_count; |
| 1868 | } |
| 1869 | |
| 1870 | /* Mark some specially defined symbols as absolute. */ |
| 1871 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 |
| 1872 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0 |
| 1873 | || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0) |
| 1874 | sym->st_shndx = SHN_ABS; |
| 1875 | |
| 1876 | return true; |
| 1877 | } |
| 1878 | |
| 1879 | /* Finish up the dynamic sections. */ |
| 1880 | |
| 1881 | static boolean |
| 1882 | elf32_sparc_finish_dynamic_sections (output_bfd, info) |
| 1883 | bfd *output_bfd; |
| 1884 | struct bfd_link_info *info; |
| 1885 | { |
| 1886 | bfd *dynobj; |
| 1887 | asection *sdyn; |
| 1888 | asection *sgot; |
| 1889 | |
| 1890 | dynobj = elf_hash_table (info)->dynobj; |
| 1891 | |
| 1892 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); |
| 1893 | |
| 1894 | if (elf_hash_table (info)->dynamic_sections_created) |
| 1895 | { |
| 1896 | asection *splt; |
| 1897 | Elf32_External_Dyn *dyncon, *dynconend; |
| 1898 | |
| 1899 | splt = bfd_get_section_by_name (dynobj, ".plt"); |
| 1900 | BFD_ASSERT (splt != NULL && sdyn != NULL); |
| 1901 | |
| 1902 | dyncon = (Elf32_External_Dyn *) sdyn->contents; |
| 1903 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size); |
| 1904 | for (; dyncon < dynconend; dyncon++) |
| 1905 | { |
| 1906 | Elf_Internal_Dyn dyn; |
| 1907 | const char *name; |
| 1908 | boolean size; |
| 1909 | |
| 1910 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); |
| 1911 | |
| 1912 | switch (dyn.d_tag) |
| 1913 | { |
| 1914 | case DT_PLTGOT: name = ".plt"; size = false; break; |
| 1915 | case DT_PLTRELSZ: name = ".rela.plt"; size = true; break; |
| 1916 | case DT_JMPREL: name = ".rela.plt"; size = false; break; |
| 1917 | default: name = NULL; size = false; break; |
| 1918 | } |
| 1919 | |
| 1920 | if (name != NULL) |
| 1921 | { |
| 1922 | asection *s; |
| 1923 | |
| 1924 | s = bfd_get_section_by_name (output_bfd, name); |
| 1925 | if (s == NULL) |
| 1926 | dyn.d_un.d_val = 0; |
| 1927 | else |
| 1928 | { |
| 1929 | if (! size) |
| 1930 | dyn.d_un.d_ptr = s->vma; |
| 1931 | else |
| 1932 | { |
| 1933 | if (s->_cooked_size != 0) |
| 1934 | dyn.d_un.d_val = s->_cooked_size; |
| 1935 | else |
| 1936 | dyn.d_un.d_val = s->_raw_size; |
| 1937 | } |
| 1938 | } |
| 1939 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| 1940 | } |
| 1941 | } |
| 1942 | |
| 1943 | /* Clear the first four entries in the procedure linkage table, |
| 1944 | and put a nop in the last four bytes. */ |
| 1945 | if (splt->_raw_size > 0) |
| 1946 | { |
| 1947 | memset (splt->contents, 0, 4 * PLT_ENTRY_SIZE); |
| 1948 | bfd_put_32 (output_bfd, (bfd_vma) SPARC_NOP, |
| 1949 | splt->contents + splt->_raw_size - 4); |
| 1950 | } |
| 1951 | |
| 1952 | elf_section_data (splt->output_section)->this_hdr.sh_entsize = |
| 1953 | PLT_ENTRY_SIZE; |
| 1954 | } |
| 1955 | |
| 1956 | /* Set the first entry in the global offset table to the address of |
| 1957 | the dynamic section. */ |
| 1958 | sgot = bfd_get_section_by_name (dynobj, ".got"); |
| 1959 | BFD_ASSERT (sgot != NULL); |
| 1960 | if (sgot->_raw_size > 0) |
| 1961 | { |
| 1962 | if (sdyn == NULL) |
| 1963 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); |
| 1964 | else |
| 1965 | bfd_put_32 (output_bfd, |
| 1966 | sdyn->output_section->vma + sdyn->output_offset, |
| 1967 | sgot->contents); |
| 1968 | } |
| 1969 | |
| 1970 | elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; |
| 1971 | |
| 1972 | return true; |
| 1973 | } |
| 1974 | \f |
| 1975 | /* Functions for dealing with the e_flags field. |
| 1976 | |
| 1977 | We don't define set_private_flags or copy_private_bfd_data because |
| 1978 | the only currently defined values are based on the bfd mach number, |
| 1979 | so we use the latter instead and defer setting e_flags until the |
| 1980 | file is written out. */ |
| 1981 | |
| 1982 | /* Merge backend specific data from an object file to the output |
| 1983 | object file when linking. */ |
| 1984 | |
| 1985 | static boolean |
| 1986 | elf32_sparc_merge_private_bfd_data (ibfd, obfd) |
| 1987 | bfd *ibfd; |
| 1988 | bfd *obfd; |
| 1989 | { |
| 1990 | boolean error; |
| 1991 | /* FIXME: This should not be static. */ |
| 1992 | static unsigned long previous_ibfd_e_flags = (unsigned long) -1; |
| 1993 | |
| 1994 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour |
| 1995 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) |
| 1996 | return true; |
| 1997 | |
| 1998 | error = false; |
| 1999 | |
| 2000 | if (bfd_get_mach (ibfd) >= bfd_mach_sparc_v9) |
| 2001 | { |
| 2002 | error = true; |
| 2003 | (*_bfd_error_handler) |
| 2004 | (_("%s: compiled for a 64 bit system and target is 32 bit"), |
| 2005 | bfd_archive_filename (ibfd)); |
| 2006 | } |
| 2007 | else if ((ibfd->flags & DYNAMIC) == 0) |
| 2008 | { |
| 2009 | if (bfd_get_mach (obfd) < bfd_get_mach (ibfd)) |
| 2010 | bfd_set_arch_mach (obfd, bfd_arch_sparc, bfd_get_mach (ibfd)); |
| 2011 | } |
| 2012 | |
| 2013 | if (((elf_elfheader (ibfd)->e_flags & EF_SPARC_LEDATA) |
| 2014 | != previous_ibfd_e_flags) |
| 2015 | && previous_ibfd_e_flags != (unsigned long) -1) |
| 2016 | { |
| 2017 | (*_bfd_error_handler) |
| 2018 | (_("%s: linking little endian files with big endian files"), |
| 2019 | bfd_archive_filename (ibfd)); |
| 2020 | error = true; |
| 2021 | } |
| 2022 | previous_ibfd_e_flags = elf_elfheader (ibfd)->e_flags & EF_SPARC_LEDATA; |
| 2023 | |
| 2024 | if (error) |
| 2025 | { |
| 2026 | bfd_set_error (bfd_error_bad_value); |
| 2027 | return false; |
| 2028 | } |
| 2029 | |
| 2030 | return true; |
| 2031 | } |
| 2032 | \f |
| 2033 | /* Set the right machine number. */ |
| 2034 | |
| 2035 | static boolean |
| 2036 | elf32_sparc_object_p (abfd) |
| 2037 | bfd *abfd; |
| 2038 | { |
| 2039 | if (elf_elfheader (abfd)->e_machine == EM_SPARC32PLUS) |
| 2040 | { |
| 2041 | if (elf_elfheader (abfd)->e_flags & EF_SPARC_SUN_US3) |
| 2042 | return bfd_default_set_arch_mach (abfd, bfd_arch_sparc, |
| 2043 | bfd_mach_sparc_v8plusb); |
| 2044 | else if (elf_elfheader (abfd)->e_flags & EF_SPARC_SUN_US1) |
| 2045 | return bfd_default_set_arch_mach (abfd, bfd_arch_sparc, |
| 2046 | bfd_mach_sparc_v8plusa); |
| 2047 | else if (elf_elfheader (abfd)->e_flags & EF_SPARC_32PLUS) |
| 2048 | return bfd_default_set_arch_mach (abfd, bfd_arch_sparc, |
| 2049 | bfd_mach_sparc_v8plus); |
| 2050 | else |
| 2051 | return false; |
| 2052 | } |
| 2053 | else if (elf_elfheader (abfd)->e_flags & EF_SPARC_LEDATA) |
| 2054 | return bfd_default_set_arch_mach (abfd, bfd_arch_sparc, |
| 2055 | bfd_mach_sparc_sparclite_le); |
| 2056 | else |
| 2057 | return bfd_default_set_arch_mach (abfd, bfd_arch_sparc, bfd_mach_sparc); |
| 2058 | } |
| 2059 | |
| 2060 | /* The final processing done just before writing out the object file. |
| 2061 | We need to set the e_machine field appropriately. */ |
| 2062 | |
| 2063 | static void |
| 2064 | elf32_sparc_final_write_processing (abfd, linker) |
| 2065 | bfd *abfd; |
| 2066 | boolean linker ATTRIBUTE_UNUSED; |
| 2067 | { |
| 2068 | switch (bfd_get_mach (abfd)) |
| 2069 | { |
| 2070 | case bfd_mach_sparc : |
| 2071 | break; /* nothing to do */ |
| 2072 | case bfd_mach_sparc_v8plus : |
| 2073 | elf_elfheader (abfd)->e_machine = EM_SPARC32PLUS; |
| 2074 | elf_elfheader (abfd)->e_flags &=~ EF_SPARC_32PLUS_MASK; |
| 2075 | elf_elfheader (abfd)->e_flags |= EF_SPARC_32PLUS; |
| 2076 | break; |
| 2077 | case bfd_mach_sparc_v8plusa : |
| 2078 | elf_elfheader (abfd)->e_machine = EM_SPARC32PLUS; |
| 2079 | elf_elfheader (abfd)->e_flags &=~ EF_SPARC_32PLUS_MASK; |
| 2080 | elf_elfheader (abfd)->e_flags |= EF_SPARC_32PLUS | EF_SPARC_SUN_US1; |
| 2081 | break; |
| 2082 | case bfd_mach_sparc_v8plusb : |
| 2083 | elf_elfheader (abfd)->e_machine = EM_SPARC32PLUS; |
| 2084 | elf_elfheader (abfd)->e_flags &=~ EF_SPARC_32PLUS_MASK; |
| 2085 | elf_elfheader (abfd)->e_flags |= EF_SPARC_32PLUS | EF_SPARC_SUN_US1 |
| 2086 | | EF_SPARC_SUN_US3; |
| 2087 | break; |
| 2088 | case bfd_mach_sparc_sparclite_le : |
| 2089 | elf_elfheader (abfd)->e_machine = EM_SPARC; |
| 2090 | elf_elfheader (abfd)->e_flags |= EF_SPARC_LEDATA; |
| 2091 | break; |
| 2092 | default : |
| 2093 | abort (); |
| 2094 | break; |
| 2095 | } |
| 2096 | } |
| 2097 | |
| 2098 | static enum elf_reloc_type_class |
| 2099 | elf32_sparc_reloc_type_class (rela) |
| 2100 | const Elf_Internal_Rela *rela; |
| 2101 | { |
| 2102 | switch ((int) ELF32_R_TYPE (rela->r_info)) |
| 2103 | { |
| 2104 | case R_SPARC_RELATIVE: |
| 2105 | return reloc_class_relative; |
| 2106 | case R_SPARC_JMP_SLOT: |
| 2107 | return reloc_class_plt; |
| 2108 | case R_SPARC_COPY: |
| 2109 | return reloc_class_copy; |
| 2110 | default: |
| 2111 | return reloc_class_normal; |
| 2112 | } |
| 2113 | } |
| 2114 | \f |
| 2115 | #define TARGET_BIG_SYM bfd_elf32_sparc_vec |
| 2116 | #define TARGET_BIG_NAME "elf32-sparc" |
| 2117 | #define ELF_ARCH bfd_arch_sparc |
| 2118 | #define ELF_MACHINE_CODE EM_SPARC |
| 2119 | #define ELF_MACHINE_ALT1 EM_SPARC32PLUS |
| 2120 | #define ELF_MAXPAGESIZE 0x10000 |
| 2121 | |
| 2122 | #define bfd_elf32_bfd_reloc_type_lookup elf32_sparc_reloc_type_lookup |
| 2123 | #define bfd_elf32_bfd_relax_section elf32_sparc_relax_section |
| 2124 | #define elf_info_to_howto elf32_sparc_info_to_howto |
| 2125 | #define elf_backend_create_dynamic_sections \ |
| 2126 | _bfd_elf_create_dynamic_sections |
| 2127 | #define elf_backend_check_relocs elf32_sparc_check_relocs |
| 2128 | #define elf_backend_adjust_dynamic_symbol \ |
| 2129 | elf32_sparc_adjust_dynamic_symbol |
| 2130 | #define elf_backend_size_dynamic_sections \ |
| 2131 | elf32_sparc_size_dynamic_sections |
| 2132 | #define elf_backend_relocate_section elf32_sparc_relocate_section |
| 2133 | #define elf_backend_finish_dynamic_symbol \ |
| 2134 | elf32_sparc_finish_dynamic_symbol |
| 2135 | #define elf_backend_finish_dynamic_sections \ |
| 2136 | elf32_sparc_finish_dynamic_sections |
| 2137 | #define bfd_elf32_bfd_merge_private_bfd_data \ |
| 2138 | elf32_sparc_merge_private_bfd_data |
| 2139 | #define elf_backend_object_p elf32_sparc_object_p |
| 2140 | #define elf_backend_final_write_processing \ |
| 2141 | elf32_sparc_final_write_processing |
| 2142 | #define elf_backend_gc_mark_hook elf32_sparc_gc_mark_hook |
| 2143 | #define elf_backend_gc_sweep_hook elf32_sparc_gc_sweep_hook |
| 2144 | #define elf_backend_reloc_type_class elf32_sparc_reloc_type_class |
| 2145 | |
| 2146 | #define elf_backend_can_gc_sections 1 |
| 2147 | #define elf_backend_want_got_plt 0 |
| 2148 | #define elf_backend_plt_readonly 0 |
| 2149 | #define elf_backend_want_plt_sym 1 |
| 2150 | #define elf_backend_got_header_size 4 |
| 2151 | #define elf_backend_plt_header_size (4*PLT_ENTRY_SIZE) |
| 2152 | |
| 2153 | #include "elf32-target.h" |