1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 #if defined(_KERNEL) 30 #include <sys/types.h> 31 #include "reloc.h" 32 #else 33 #include <stdio.h> 34 #include "sgs.h" 35 #include "machdep.h" 36 #include "libld.h" 37 #include "reloc.h" 38 #include "conv.h" 39 #include "msg.h" 40 #endif 41 42 /* 43 * This table represents the current relocations that do_reloc() is able to 44 * process. The relocations below that are marked SPECIAL are relocations that 45 * take special processing and shouldn't actually ever be passed to do_reloc(). 46 */ 47 const Rel_entry reloc_table[R_SPARC_NUM] = { 48 /* R_SPARC_NONE */ {0x0, FLG_RE_NOTREL, 0, 0, 0}, 49 /* R_SPARC_8 */ {0x0, FLG_RE_VERIFY, 1, 0, 0}, 50 /* R_SPARC_16 */ {0x0, FLG_RE_VERIFY, 2, 0, 0}, 51 /* R_SPARC_32 */ {0x0, FLG_RE_VERIFY, 4, 0, 0}, 52 /* R_SPARC_DISP8 */ {0x0, FLG_RE_PCREL | FLG_RE_VERIFY | FLG_RE_SIGN, 53 1, 0, 0}, 54 /* R_SPARC_DISP16 */ {0x0, FLG_RE_PCREL | FLG_RE_VERIFY | FLG_RE_SIGN, 55 2, 0, 0}, 56 /* R_SPARC_DISP32 */ {0x0, FLG_RE_PCREL | FLG_RE_VERIFY | FLG_RE_SIGN, 57 4, 0, 0}, 58 /* R_SPARC_WDISP30 */ {0x0, FLG_RE_PCREL | FLG_RE_VERIFY | FLG_RE_SIGN, 59 4, 2, 30}, 60 /* R_SPARC_WDISP22 */ {0x0, FLG_RE_PCREL | FLG_RE_VERIFY | FLG_RE_SIGN, 61 4, 2, 22}, 62 #if defined(_ELF64) 63 /* R_SPARC_HI22 */ {0x0, FLG_RE_VERIFY, 4, 10, 22}, 64 #else 65 /* R_SPARC_HI22 */ {0x0, FLG_RE_NOTREL, 4, 10, 22}, 66 #endif 67 /* R_SPARC_22 */ {0x0, FLG_RE_VERIFY, 4, 0, 22}, 68 /* R_SPARC_13 */ {0x0, FLG_RE_VERIFY | FLG_RE_SIGN, 4, 0, 13}, 69 /* R_SPARC_LO10 */ {0x3ff, FLG_RE_SIGN, 4, 0, 13}, 70 /* R_SPARC_GOT10 */ {0x3ff, FLG_RE_GOTADD | FLG_RE_SIGN, 4, 0, 13}, 71 /* R_SPARC_GOT13 */ {0x0, FLG_RE_GOTADD | FLG_RE_VERIFY | FLG_RE_SIGN, 72 4, 0, 13}, 73 /* R_SPARC_GOT22 */ {0x0, FLG_RE_GOTADD, 4, 10, 22}, 74 /* R_SPARC_PC10 */ {0x3ff, FLG_RE_PCREL | FLG_RE_SIGN | FLG_RE_LOCLBND, 75 4, 0, 13}, 76 /* R_SPARC_PC22 */ {0x0, FLG_RE_PCREL | FLG_RE_SIGN | FLG_RE_VERIFY | 77 FLG_RE_LOCLBND, 4, 10, 22}, 78 /* R_SPARC_WPLT30 */ {0x0, FLG_RE_PCREL | FLG_RE_PLTREL | 79 FLG_RE_VERIFY | FLG_RE_SIGN, 80 4, 2, 30}, 81 /* R_SPARC_COPY */ {0x0, 0, 0, 0, 0}, /* SPECIAL */ 82 #if defined(_ELF64) 83 /* R_SPARC_GLOB_DAT */ {0x0, FLG_RE_NOTREL, 8, 0, 0}, 84 #else 85 /* R_SPARC_GLOB_DAT */ {0x0, FLG_RE_NOTREL, 4, 0, 0}, 86 #endif 87 /* R_SPARC_JMP_SLOT */ {0x0, 0, 0, 0, 0}, /* SPECIAL */ 88 #if defined(_ELF64) 89 /* R_SPARC_RELATIVE */ {0x0, FLG_RE_NOTREL, 8, 0, 0}, 90 #else 91 /* R_SPARC_RELATIVE */ {0x0, FLG_RE_NOTREL, 4, 0, 0}, 92 #endif 93 /* R_SPARC_UA32 */ {0x0, FLG_RE_UNALIGN, 4, 0, 0}, 94 /* R_SPARC_PLT32 */ {0x0, FLG_RE_PLTREL | FLG_RE_VERIFY | 95 FLG_RE_ADDRELATIVE, 4, 0, 0}, 96 /* R_SPARC_HIPLT22 */ {0x0, FLG_RE_PLTREL, 4, 10, 22}, 97 /* R_SPARC_LOPLT10 */ {0x3ff, FLG_RE_PLTREL, 4, 0, 13}, 98 /* R_SPARC_PCPLT32 */ {0x0, FLG_RE_PLTREL | FLG_RE_PCREL | FLG_RE_VERIFY, 99 4, 0, 0}, 100 /* R_SPARC_PCPLT22 */ {0x0, FLG_RE_PLTREL | FLG_RE_PCREL | FLG_RE_VERIFY, 101 4, 10, 22}, 102 /* R_SPARC_PCPLT10 */ {0x3ff, FLG_RE_PLTREL | FLG_RE_PCREL | FLG_RE_VERIFY, 103 4, 0, 13}, 104 /* R_SPARC_10 */ {0x0, FLG_RE_VERIFY | FLG_RE_SIGN, 4, 0, 10}, 105 /* R_SPARC_11 */ {0x0, FLG_RE_VERIFY | FLG_RE_SIGN, 4, 0, 11}, 106 /* R_SPARC_64 */ {0x0, FLG_RE_VERIFY, 8, 0, 0}, /* V9 */ 107 /* R_SPARC_OLO10 */ {0x3ff, FLG_RE_EXTOFFSET | FLG_RE_SIGN, 108 4, 0, 13}, /* V9 */ 109 /* R_SPARC_HH22 */ {0x0, FLG_RE_VERIFY, 4, 42, 22}, /* V9 */ 110 /* R_SPARC_HM10 */ {0x3ff, FLG_RE_SIGN, 4, 32, 13}, /* V9 */ 111 /* R_SPARC_LM22 */ {0x0, FLG_RE_NOTREL, 4, 10, 22}, /* V9 */ 112 /* R_SPARC_PC_HH22 */ {0x0, FLG_RE_PCREL | FLG_RE_VERIFY, 113 4, 42, 22}, /* V9 */ 114 /* R_SPARC_PC_HM10 */ {0x3ff, FLG_RE_PCREL | FLG_RE_SIGN, 115 4, 32, 13}, /* V9 */ 116 /* R_SPARC_PC_LM22 */ {0x0, FLG_RE_PCREL, 117 4, 10, 22}, /* V9 */ 118 /* R_SPARC_WDISP16 */ {0x0, FLG_RE_PCREL | FLG_RE_WDISP16 | 119 FLG_RE_VERIFY | FLG_RE_SIGN, 120 4, 2, 16}, 121 /* R_SPARC_WDISP19 */ {0x0, FLG_RE_PCREL | FLG_RE_VERIFY | FLG_RE_SIGN, 122 4, 2, 19}, 123 /* R_SPARC_GLOB_JMP */ {0x0, 0, 0, 0, 0}, /* V9 - not implemented */ 124 /* removed from v9 ABI */ 125 /* R_SPARC_7 */ {0x0, FLG_RE_NOTREL, 4, 0, 7}, 126 /* R_SPARC_5 */ {0x0, FLG_RE_NOTREL, 4, 0, 5}, 127 /* R_SPARC_6 */ {0x0, FLG_RE_NOTREL, 4, 0, 6}, 128 /* R_SPARC_DISP64 */ {0x0, FLG_RE_PCREL | FLG_RE_VERIFY | FLG_RE_SIGN, 129 8, 0, 0}, 130 /* R_SPARC_PLT64 */ {0x0, FLG_RE_PLTREL | FLG_RE_VERIFY | 131 FLG_RE_ADDRELATIVE, 8, 0, 0}, 132 /* R_SPARC_HIX22 */ {(Xword)(-1LL), FLG_RE_VERIFY, 133 4, 10, 22}, /* V9 - HaL */ 134 /* R_SPARC_LOX10 */ {0x3ff, FLG_RE_SIGN, 4, 0, 13}, /* V9 - HaL */ 135 /* R_SPARC_H44 */ {0x0, FLG_RE_VERIFY, 4, 22, 22}, /* V9 */ 136 /* R_SPARC_M44 */ {0x3ff, FLG_RE_NOTREL, 4, 12, 10}, /* V9 */ 137 /* R_SPARC_L44 */ {0xfff, FLG_RE_NOTREL, 4, 0, 13}, /* V9 */ 138 /* R_SPARC_REGISTER */ {0x0, FLG_RE_REGISTER, 0, 0, 0}, /* SPECIAL */ 139 /* R_SPARC_UA64 */ {0x0, FLG_RE_VERIFY | FLG_RE_UNALIGN, 140 8, 0, 0}, /* V9 */ 141 /* R_SPARC_UA16 */ {0x0, FLG_RE_VERIFY | FLG_RE_UNALIGN, 142 2, 0, 0}, 143 /* R_SPARC_TLS_GD_HI22 */ {0x0, FLG_RE_GOTADD | FLG_RE_TLSGD, 4, 10, 22}, 144 /* R_SPARC_TLS_GD_LO10 */ {0x3ff, FLG_RE_GOTADD | FLG_RE_TLSGD | 145 FLG_RE_SIGN, 4, 0, 13}, 146 /* R_SPARC_TLS_GD_ADD */ {0x0, FLG_RE_TLSGD, 0, 0, 0}, 147 /* R_SPARC_TLS_GD_CALL */ {0x0, FLG_RE_TLSGD, 0, 0, 0}, 148 /* R_SPARC_TLS_LDM_HI22 */ {0x0, FLG_RE_GOTADD | FLG_RE_TLSLD, 4, 10, 22}, 149 /* R_SPARC_TLS_LDM_LO10 */ {0x3ff, FLG_RE_GOTADD | FLG_RE_TLSLD | 150 FLG_RE_SIGN, 4, 0, 13}, 151 /* R_SPARC_TLS_LDM_ADD */ {0x0, FLG_RE_TLSLD, 0, 0, 0}, 152 /* R_SPARC_TLS_LDM_CALL */ {0x0, FLG_RE_TLSLD, 0, 0, 0}, 153 /* R_SPARC_TLS_LDO_HIX22 */ {0x0, FLG_RE_VERIFY | FLG_RE_TLSLD, 4, 10, 22}, 154 /* R_SPARC_TLS_LDO_LOX10 */ {0x3ff, FLG_RE_SIGN | FLG_RE_TLSLD, 4, 0, 13}, 155 /* R_SPARC_TLS_LDO_ADD */ {0x0, FLG_RE_TLSLD, 0, 0, 0}, 156 /* R_SPARC_TLS_IE_HI22 */ {0x0, FLG_RE_GOTADD | FLG_RE_TLSIE, 4, 10, 22}, 157 /* R_SPARC_TLS_IE_LO10 */ {0x3ff, FLG_RE_GOTADD | FLG_RE_TLSIE | 158 FLG_RE_SIGN, 4, 0, 13}, 159 /* R_SPARC_TLS_IE_LD */ {0x0, FLG_RE_TLSIE, 0, 0, 0}, 160 /* R_SPARC_TLS_IE_LDX */ {0x0, FLG_RE_TLSIE, 0, 0, 0}, 161 /* R_SPARC_TLS_IE_ADD */ {0x0, FLG_RE_TLSIE, 0, 0, 0}, 162 /* R_SPARC_TLS_LE_HIX22 */ {(Xword)(-1LL), 163 FLG_RE_VERIFY | FLG_RE_TLSLE, 4, 10, 22}, 164 /* R_SPARC_TLS_LE_LOX10 */ {0x3ff, FLG_RE_SIGN | FLG_RE_TLSLE, 4, 0, 13}, 165 /* R_SPARC_TLS_DTPMOD32 */ {0x0, FLG_RE_NOTREL, 4, 0, 0}, 166 /* R_SPARC_TLS_DTPMOD64 */ {0x0, FLG_RE_NOTREL, 8, 0, 0}, 167 /* R_SPARC_TLS_DTPOFF32 */ {0x0, FLG_RE_NOTREL, 4, 0, 0}, 168 /* R_SPARC_TLS_DTPOFF64 */ {0x0, FLG_RE_NOTREL, 8, 0, 0}, 169 /* R_SPARC_TLS_TPOFF32 */ {0x0, FLG_RE_NOTREL, 4, 0, 0}, 170 /* R_SPARC_TLS_TPOFF64 */ {0x0, FLG_RE_NOTREL, 8, 0, 0}, 171 /* R_SPARC_GOTDATA_HIX22 */ {0, FLG_RE_GOTREL, 4, 10, 22}, 172 /* R_SPARC_GOTDATA_LOX10 */ { 0x3ff, FLG_RE_GOTREL | FLG_RE_SIGN, 4, 0, 13}, 173 /* R_SPARC_GOTDATA_OP_HIX22 */ { 0x0, FLG_RE_GOTOPINS | FLG_RE_GOTADD, 174 4, 10, 22}, 175 /* R_SPARC_GOTDATA_OP_LOX10 */ { 0x3ff, FLG_RE_SIGN | FLG_RE_GOTOPINS | 176 FLG_RE_GOTADD, 4, 0, 13}, 177 /* R_SPARC_GOTDATA_OP */ { 0x0, FLG_RE_GOTOPINS, 0, 0, 0}, 178 /* R_SPARC_H34 */ {0x0, FLG_RE_VERIFY, 4, 12, 22} /* V9 */ 179 }; 180 181 182 /* 183 * Write a single relocated value to its reference location. 184 * We assume we wish to add the relocation amount, value, to the 185 * value of the address already present in the instruction. 186 * 187 * NAME VALUE FIELD CALCULATION 188 * 189 * R_SPARC_NONE 0 none none 190 * R_SPARC_8 1 V-byte8 S + A 191 * R_SPARC_16 2 V-half16 S + A 192 * R_SPARC_32 3 V-word32 S + A 193 * R_SPARC_DISP8 4 V-byte8 S + A - P 194 * R_SPARC_DISP16 5 V-half16 S + A - P 195 * R_SPARC_DISP32 6 V-word32 S + A - P 196 * R_SPARC_WDISP30 7 V-disp30 (S + A - P) >> 2 197 * R_SPARC_WDISP22 8 V-disp22 (S + A - P) >> 2 198 * R_SPARC_HI22 9 T-imm22 (S + A) >> 10 199 * R_SPARC_22 10 V-imm22 S + A 200 * R_SPARC_13 11 V-simm13 S + A 201 * R_SPARC_LO10 12 T-simm13 (S + A) & 0x3ff 202 * R_SPARC_GOT10 13 T-simm13 G & 0x3ff 203 * R_SPARC_GOT13 14 V-simm13 G 204 * R_SPARC_GOT22 15 T-imm22 G >> 10 205 * R_SPARC_PC10 16 T-simm13 (S + A - P) & 0x3ff 206 * R_SPARC_PC22 17 V-disp22 (S + A - P) >> 10 207 * R_SPARC_WPLT30 18 V-disp30 (L + A - P) >> 2 208 * R_SPARC_COPY 19 none none 209 * R_SPARC_GLOB_DAT 20 V-word32 S + A 210 * R_SPARC_JMP_SLOT 21 V-plt22 S + A 211 * R_SPARC_RELATIVE 22 V-word32 S + A 212 * R_SPARC_UA32 23 V-word32 S + A 213 * R_SPARC_PLT32 24 V-word32 L + A 214 * R_SPARC_HIPLT22 25 T-imm22 (L + A) >> 10 215 * R_SPARC_LOPLT10 26 T-simm13 (L + A) & 0x3ff 216 * R_SPARC_PCPLT32 27 V-word32 L + A - P 217 * R_SPARC_PCPLT22 28 V-disp22 (L + A - P) >> 10 218 * R_SPARC_PCPLT10 29 V-simm13 (L + A - P) & 0x3ff 219 * R_SPARC_10 30 V-simm10 S + A 220 * R_SPARC_11 31 V-simm11 S + A 221 * R_SPARC_64 32 V-xword64 S + A 222 * R_SPARC_OLO10 33 V-simm13 ((S + A) & 0x3ff) + O 223 * R_SPARC_HH22 34 V-imm22 (S + A) >> 42 224 * R_SPARC_HM10 35 T-simm13 ((S + A) >> 32) & 0x3ff 225 * R_SPARC_LM22 36 T-imm22 (S + A) >> 10 226 * R_SPARC_PC_HH22 37 V-imm22 (S + A - P) >> 42 227 * R_SPARC_PC_HM10 38 T-simm13 ((S + A - P) >> 32) & 0x3ff 228 * R_SPARC_PC_LM22 39 T-imm22 (S + A - P) >> 10 229 * R_SPARC_WDISP16 40 V-d2/disp14 (S + A - P) >> 2 230 * R_SPARC_WDISP19 41 V-disp19 (S + A - P) >> 2 231 * R_SPARC_GLOB_JMP 42 V-xword64 S + A 232 * R_SPARC_7 43 V-imm7 S + A 233 * R_SPARC_5 44 V-imm5 S + A 234 * R_SPARC_6 45 V-imm6 S + A 235 * R_SPARC_DISP64 46 V-xword64 S + A - P 236 * R_SPARC_PLT64 47 V-xword64 L + A 237 * R_SPARC_HIX22 48 V-imm22 ((S + A) ^ 238 * 0xffffffffffffffff) >> 10 239 * R_SPARC_LOX10 49 T-simm13 ((S + A) & 0x3ff) | 0x1c00 240 * R_SPARC_H44 50 V-imm22 (S + A) >> 22 241 * R_SPARC_M44 51 T-imm10 ((S + A) >> 12) & 0x3ff 242 * R_SPARC_L44 52 T-imm13 (S + A) & 0xfff 243 * R_SPARC_REGISTER 53 V-xword64 S + A 244 * R_SPARC_UA64 54 V-xword64 S + A 245 * R_SPARC_UA16 55 V-half16 S + A 246 * R_SPARC_TLS_GD_HI22 56 T-simm22 @dtlndx(S + A) >> 10 247 * R_SPARC_TLS_GD_LO10 57 T-simm13 @dtlndx(S + A) & 0x3ff 248 * R_SPARC_TLS_GD_ADD 58 none SPECIAL 249 * R_SPARC_TLS_GD_CALL 59 V-disp30 SPECIAL 250 * R_SPARC_TLS_LDM_HI22 60 T-simm22 @tmndx(S + A) >> 10 251 * R_SPARC_TLS_LDM_LO10 61 T-simm13 @tmndx(S + A) & 0x3ff 252 * R_SPARC_TLS_LDM_ADD 62 none SPECIAL 253 * R_SPARC_TLS_LDM_CALL 63 V-disp30 SPECIAL 254 * R_SPARC_TLS_LDO_HIX22 64 V-simm22 @dtpoff(S + A) >> 10 255 * R_SPARC_TLS_LDO_LOX10 65 T-simm13 @dtpoff(S + A) & 0x3ff 256 * R_SPARC_TLS_LDO_ADD 66 none SPECIAL 257 * R_SPARC_TLS_IE_HI22 67 T-simm22 @got(@tpoff(S + A)) >> 10 258 * R_SPARC_TLS_IE_LO10 68 T-simm13 @got(@tpoff(S + A)) & 0x3ff 259 * R_SPARC_TLS_IE_LD 69 none SPECIAL 260 * R_SPARC_TLS_IE_LDX 70 none SPECIAL 261 * R_SPARC_TLS_IE_ADD 71 none SPECIAL 262 * R_SPARC_TLS_LE_HIX22 72 V-simm22 (@tpoff(S + A) ^ 263 * 0xffffffff) >> 10 264 * R_SPARC_TLS_LE_LOX10 73 T-simm13 (@tpoff(S + A) & 0x3ff) | 0x1c00 265 * R_SPARC_TLS_DTPMOD32 74 V-word32 @dtmod(S + A) 266 * R_SPARC_TLS_DTPMOD64 75 V-word64 @dtmod(S + A) 267 * R_SPARC_TLS_DTPOFF32 76 V-word32 @dtpoff(S + A) 268 * R_SPARC_TLS_DTPOFF64 77 V-word64 @dtpoff(S + A) 269 * R_SPARC_TLS_TPOFF32 78 V-word32 @tpoff(S + A) 270 * R_SPARC_TLS_TPOFF64 79 V-word64 @tpoff(S + A) 271 * R_SPARC_GOTDATA_HIX22 80 T-imm22 ((S + A - GOT) >> 10) ^ 272 * ((S + A - GOT) >> 31) 273 * R_SPARC_GOTDATA_LOX10 81 T-simm13 ((S + A - GOT) & 0x3ff) | 274 * (((S + A - GOT) >> 31) & 275 * 0x1c00) 276 * R_SPARC_GOTDATA_OP_HIX22 82 T-imm22 (G >> 10) & (G >> 31) 277 * R_SPARC_GOTDATA_OP_LOX10 83 T-simm13 (G & 0x3ff) | 278 * ((G >> 31) & 0x1c00) 279 * R_SPARC_H34 84 V-imm22 (S + A) >> 12 280 * 281 * This is Figure 4-20: Relocation Types from the Draft Copy of 282 * the ABI, Printed on 11/29/88. 283 * 284 * NOTE1: relocations 24->45 are newly registered relocations to support 285 * C++ ABI & SPARC V8+ and SPARC V9 architectures (1/9/94), and 286 * 64-bit relocations 46-55 were added for SPARC V9. 287 * 288 * NOTE2: relocations 56->79 are added to support Thread-Local storage 289 * as recorded in PSARC/2001/509 290 * 291 * NOTE3: The value to be passed for relocations R_SPARC_HIX22 and 292 * R_SPARC_TLS_HIX22 are negative values. So the upper 10 or 40 bits 293 * are 1. (So when the exclusive OR is applied, the upper bits 294 * will be 0.) 295 * 296 * Relocation calculations: 297 * 298 * The FIELD names indicate whether the relocation type checks for overflow. 299 * A calculated relocation value may be larger than the intended field, and 300 * the relocation type may verify (V) that the value fits, or truncate (T) 301 * the result. 302 * 303 * CALCULATION uses the following notation: 304 * A the addend used 305 * B the base address of the shared object in memory 306 * G the offset into the global offset table 307 * L the procedure linkage entry 308 * P the place of the storage unit being relocated 309 * S the value of the symbol 310 * O secondary addend (extra offset) in v9 r_info field 311 * 312 * @dtlndx(x): Allocate two contiguous entries in the GOT table to hold 313 * a Tls_index structure (for passing to __tls_get_addr()). The 314 * instructions referencing this entry will be bound to the first 315 * of the two GOT entries. 316 * 317 * @tmndx(x): Allocate two contiguous entries in the GOT table to hold 318 * a Tls_index structure (for passing to __tls_get_addr()). The 319 * ti_offset field of the Tls_index will be set to 0 (zero) and the 320 * ti_module will be filled in at run-time. The call to 321 * __tls_get_addr() will return the starting offset of the dynamic 322 * TLS block. 323 * 324 * @dtpoff(x): calculate the tlsoffset relative to the TLS block. 325 * 326 * @tpoff(x): calculate the negative tlsoffset relative to the static 327 * TLS block. This value can be added to the thread-pointer to 328 * calculate the tls address. 329 * 330 * @dtpmod(x): calculate the module id of the object containing symbol x. 331 * 332 * The calculations in the CALCULATION column are assumed to have been performed 333 * before calling this function except for the addition of the addresses in the 334 * instructions. 335 * 336 * Upon successful completion of do_reloc() *value will be set to the 337 * 'bit-shifted' value that will be or'ed into memory. 338 */ 339 /* ARGSUSED5 */ 340 int 341 do_reloc(uchar_t rtype, uchar_t *off, Xword *value, const char *sym, 342 const char *file, void *lml) 343 { 344 Xword uvalue = 0; 345 Xword basevalue, sigbit_mask, sigfit_mask; 346 Xword corevalue = *value; 347 uchar_t bshift; 348 int field_size, re_flags; 349 const Rel_entry * rep; 350 351 rep = &reloc_table[rtype]; 352 bshift = rep->re_bshift; 353 field_size = rep->re_fsize; 354 re_flags = rep->re_flags; 355 sigbit_mask = S_MASK(rep->re_sigbits); 356 357 if ((re_flags & FLG_RE_SIGN) && sigbit_mask) { 358 /* 359 * sigfit_mask takes into account that a value 360 * might be signed and discards the signbit for 361 * comparison. 362 */ 363 sigfit_mask = S_MASK(rep->re_sigbits - 1); 364 } else 365 sigfit_mask = sigbit_mask; 366 367 if (field_size == 0) { 368 REL_ERR_UNIMPL(lml, file, sym, rtype); 369 return (0); 370 } 371 372 if (re_flags & FLG_RE_UNALIGN) { 373 int i; 374 uchar_t *dest = (uchar_t *)&basevalue; 375 376 /* 377 * Adjust the offset. 378 */ 379 /* LINTED */ 380 i = (int)(sizeof (Xword) - field_size); 381 if (i > 0) 382 dest += i; 383 384 basevalue = 0; 385 for (i = field_size - 1; i >= 0; i--) 386 dest[i] = off[i]; 387 } else { 388 if (((field_size == 2) && ((uintptr_t)off & 0x1)) || 389 ((field_size == 4) && ((uintptr_t)off & 0x3)) || 390 ((field_size == 8) && ((uintptr_t)off & 0x7))) { 391 REL_ERR_NONALIGN(lml, file, sym, rtype, (uintptr_t)off); 392 return (0); 393 } 394 switch (field_size) { 395 case 1: 396 basevalue = (Xword)*((uchar_t *)off); 397 break; 398 case 2: 399 /* LINTED */ 400 basevalue = (Xword)*((Half *)off); 401 break; 402 case 4: 403 /* LINTED */ 404 basevalue = (Xword)*((Word *)off); 405 break; 406 case 8: 407 /* LINTED */ 408 basevalue = (Xword)*((Xword *)off); 409 break; 410 default: 411 REL_ERR_UNNOBITS(lml, file, sym, rtype, 412 (rep->re_fsize * 8)); 413 return (0); 414 } 415 } 416 417 if (sigbit_mask) { 418 /* 419 * The WDISP16 relocation is an unusual one in that it's bits 420 * are not all contiguous. We have to selectivly pull them out. 421 */ 422 if (re_flags & FLG_RE_WDISP16) { 423 uvalue = ((basevalue & 0x300000) >> 6) | 424 (basevalue & 0x3fff); 425 basevalue &= ~0x303fff; 426 } else { 427 uvalue = sigbit_mask & basevalue; 428 basevalue &= ~sigbit_mask; 429 } 430 /* 431 * If value is signed make sure that we signextend the uvalue. 432 */ 433 if (re_flags & FLG_RE_SIGN) { 434 if (uvalue & (~sigbit_mask & sigfit_mask)) 435 uvalue |= ~sigbit_mask; 436 } 437 } else 438 uvalue = basevalue; 439 440 if (bshift) 441 uvalue <<= bshift; 442 443 uvalue += *value; 444 445 if (rep->re_mask && 446 ((rtype == R_SPARC_HIX22) || (rtype == R_SPARC_TLS_LE_HIX22))) 447 uvalue ^= rep->re_mask; 448 449 if (bshift) { 450 /* 451 * This is to check that we are not attempting to 452 * jump to a non-4 byte aligned address. 453 */ 454 if ((bshift == 2) && (uvalue & 0x3)) { 455 REL_ERR_LOSEBITS(lml, file, sym, rtype, uvalue, 2, off); 456 return (0); 457 } 458 459 if (re_flags & FLG_RE_SIGN) { 460 uvalue = (Sxword)uvalue >> bshift; 461 } else { 462 uvalue >>= bshift; 463 } 464 corevalue >>= bshift; 465 } 466 467 if ((rtype == R_SPARC_GOTDATA_HIX22) || 468 (rtype == R_SPARC_GOTDATA_OP_HIX22)) { 469 uvalue ^= ((Sxword)(*value) >> 31); 470 corevalue ^= ((Sxword)(*value) >> 31); 471 } 472 473 if (rep->re_mask && 474 (rtype != R_SPARC_HIX22) && (rtype != R_SPARC_TLS_LE_HIX22) && 475 (rtype != R_SPARC_GOTDATA_HIX22)) 476 uvalue &= rep->re_mask; 477 478 if ((rtype == R_SPARC_LOX10) || (rtype == R_SPARC_TLS_LE_LOX10)) { 479 uvalue |= 0x1c00; 480 corevalue |= 0x1c00; 481 } 482 483 if ((rtype == R_SPARC_GOTDATA_LOX10) || 484 (rtype == R_SPARC_GOTDATA_OP_LOX10)) { 485 uvalue |= ((Sxword)(*value) >> 31) & 0x1c00; 486 corevalue |= ((Sxword)(*value) >> 31) & 0x1c00; 487 } 488 489 490 if ((re_flags & FLG_RE_VERIFY) && sigbit_mask) { 491 if (((re_flags & FLG_RE_SIGN) && 492 (S_INRANGE((Sxword)uvalue, rep->re_sigbits - 1) == 0)) || 493 (!(re_flags & FLG_RE_SIGN) && 494 ((sigbit_mask & uvalue) != uvalue))) { 495 REL_ERR_NOFIT(lml, file, sym, rtype, uvalue); 496 return (0); 497 } 498 } 499 500 if (sigbit_mask) { 501 /* 502 * Again the R_SPARC_WDISP16 relocation takes special 503 * processing because of its non-continguous bits. 504 */ 505 if (re_flags & FLG_RE_WDISP16) 506 uvalue = ((uvalue & 0xc000) << 6) | 507 (uvalue & 0x3fff); 508 else 509 uvalue &= sigbit_mask; 510 /* 511 * Combine value back with original word 512 */ 513 uvalue |= basevalue; 514 } 515 *value = corevalue; 516 517 if (re_flags & FLG_RE_UNALIGN) { 518 int i; 519 uchar_t *src = (uchar_t *)&uvalue; 520 521 /* 522 * Adjust the offset. 523 */ 524 /* LINTED */ 525 i = (int)(sizeof (Xword) - field_size); 526 if (i > 0) 527 src += i; 528 529 for (i = field_size - 1; i >= 0; i--) 530 off[i] = src[i]; 531 } else { 532 switch (rep->re_fsize) { 533 case 1: 534 /* LINTED */ 535 *((uchar_t *)off) = (uchar_t)uvalue; 536 break; 537 case 2: 538 /* LINTED */ 539 *((Half *)off) = (Half)uvalue; 540 break; 541 case 4: 542 /* LINTED */ 543 *((Word *)off) = uvalue; 544 break; 545 case 8: 546 /* LINTED */ 547 *((Xword *)off) = uvalue; 548 break; 549 default: 550 /* 551 * To keep chkmsg() happy: MSG_INTL(MSG_REL_UNSUPSZ) 552 */ 553 REL_ERR_UNSUPSZ(lml, file, sym, rtype, rep->re_fsize); 554 return (0); 555 } 556 } 557 return (1); 558 } 559