Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/sparc64/sparc64/elf_machdep.c
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1 /*- 2 * Copyright (c) 2001 Jake Burkholder. 3 * Copyright (c) 2000 Eduardo Horvath. 4 * Copyright (c) 1999 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Paul Kranenburg. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 * 38 * from: NetBSD: mdreloc.c,v 1.5 2001/04/25 12:24:51 kleink Exp 39 * $FreeBSD: releng/5.2/sys/sparc64/sparc64/elf_machdep.c 120422 2003-09-25 01:10:26Z peter $ 40 */ 41 42 #include <sys/param.h> 43 #include <sys/kernel.h> 44 #include <sys/systm.h> 45 #include <sys/exec.h> 46 #include <sys/imgact.h> 47 #include <sys/linker.h> 48 #include <sys/sysent.h> 49 #include <sys/imgact_elf.h> 50 #include <sys/syscall.h> 51 #include <sys/signalvar.h> 52 #include <sys/vnode.h> 53 54 #include <vm/vm.h> 55 #include <vm/vm_param.h> 56 57 #include <machine/elf.h> 58 59 #include "linker_if.h" 60 61 struct sysentvec elf64_freebsd_sysvec = { 62 SYS_MAXSYSCALL, 63 sysent, 64 0, 65 0, 66 NULL, 67 0, 68 NULL, 69 NULL, 70 __elfN(freebsd_fixup), 71 sendsig, 72 NULL, 73 NULL, 74 NULL, 75 "FreeBSD ELF64", 76 __elfN(coredump), 77 NULL, 78 MINSIGSTKSZ, 79 PAGE_SIZE, 80 VM_MIN_ADDRESS, 81 VM_MAXUSER_ADDRESS, 82 USRSTACK, 83 PS_STRINGS, 84 VM_PROT_READ | VM_PROT_WRITE, 85 exec_copyout_strings, 86 exec_setregs, 87 NULL 88 }; 89 90 static Elf64_Brandinfo freebsd_brand_info = { 91 ELFOSABI_FREEBSD, 92 EM_SPARCV9, 93 "FreeBSD", 94 "", 95 "/libexec/ld-elf.so.1", 96 &elf64_freebsd_sysvec 97 }; 98 99 SYSINIT(elf64, SI_SUB_EXEC, SI_ORDER_ANY, 100 (sysinit_cfunc_t) elf64_insert_brand_entry, 101 &freebsd_brand_info); 102 103 /* 104 * The following table holds for each relocation type: 105 * - the width in bits of the memory location the relocation 106 * applies to (not currently used) 107 * - the number of bits the relocation value must be shifted to the 108 * right (i.e. discard least significant bits) to fit into 109 * the appropriate field in the instruction word. 110 * - flags indicating whether 111 * * the relocation involves a symbol 112 * * the relocation is relative to the current position 113 * * the relocation is for a GOT entry 114 * * the relocation is relative to the load address 115 * 116 */ 117 #define _RF_S 0x80000000 /* Resolve symbol */ 118 #define _RF_A 0x40000000 /* Use addend */ 119 #define _RF_P 0x20000000 /* Location relative */ 120 #define _RF_G 0x10000000 /* GOT offset */ 121 #define _RF_B 0x08000000 /* Load address relative */ 122 #define _RF_U 0x04000000 /* Unaligned */ 123 #define _RF_SZ(s) (((s) & 0xff) << 8) /* memory target size */ 124 #define _RF_RS(s) ( (s) & 0xff) /* right shift */ 125 static int reloc_target_flags[] = { 126 0, /* NONE */ 127 _RF_S|_RF_A| _RF_SZ(8) | _RF_RS(0), /* RELOC_8 */ 128 _RF_S|_RF_A| _RF_SZ(16) | _RF_RS(0), /* RELOC_16 */ 129 _RF_S|_RF_A| _RF_SZ(32) | _RF_RS(0), /* RELOC_32 */ 130 _RF_S|_RF_A|_RF_P| _RF_SZ(8) | _RF_RS(0), /* DISP_8 */ 131 _RF_S|_RF_A|_RF_P| _RF_SZ(16) | _RF_RS(0), /* DISP_16 */ 132 _RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(0), /* DISP_32 */ 133 _RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(2), /* WDISP_30 */ 134 _RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(2), /* WDISP_22 */ 135 _RF_S|_RF_A| _RF_SZ(32) | _RF_RS(10), /* HI22 */ 136 _RF_S|_RF_A| _RF_SZ(32) | _RF_RS(0), /* 22 */ 137 _RF_S|_RF_A| _RF_SZ(32) | _RF_RS(0), /* 13 */ 138 _RF_S|_RF_A| _RF_SZ(32) | _RF_RS(0), /* LO10 */ 139 _RF_G| _RF_SZ(32) | _RF_RS(0), /* GOT10 */ 140 _RF_G| _RF_SZ(32) | _RF_RS(0), /* GOT13 */ 141 _RF_G| _RF_SZ(32) | _RF_RS(10), /* GOT22 */ 142 _RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(0), /* PC10 */ 143 _RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(10), /* PC22 */ 144 _RF_A|_RF_P| _RF_SZ(32) | _RF_RS(2), /* WPLT30 */ 145 _RF_SZ(32) | _RF_RS(0), /* COPY */ 146 _RF_S|_RF_A| _RF_SZ(64) | _RF_RS(0), /* GLOB_DAT */ 147 _RF_SZ(32) | _RF_RS(0), /* JMP_SLOT */ 148 _RF_A| _RF_B| _RF_SZ(64) | _RF_RS(0), /* RELATIVE */ 149 _RF_S|_RF_A| _RF_U| _RF_SZ(32) | _RF_RS(0), /* UA_32 */ 150 151 _RF_A| _RF_SZ(32) | _RF_RS(0), /* PLT32 */ 152 _RF_A| _RF_SZ(32) | _RF_RS(10), /* HIPLT22 */ 153 _RF_A| _RF_SZ(32) | _RF_RS(0), /* LOPLT10 */ 154 _RF_A|_RF_P| _RF_SZ(32) | _RF_RS(0), /* PCPLT32 */ 155 _RF_A|_RF_P| _RF_SZ(32) | _RF_RS(10), /* PCPLT22 */ 156 _RF_A|_RF_P| _RF_SZ(32) | _RF_RS(0), /* PCPLT10 */ 157 _RF_S|_RF_A| _RF_SZ(32) | _RF_RS(0), /* 10 */ 158 _RF_S|_RF_A| _RF_SZ(32) | _RF_RS(0), /* 11 */ 159 _RF_S|_RF_A| _RF_SZ(64) | _RF_RS(0), /* 64 */ 160 _RF_S|_RF_A|/*extra*/ _RF_SZ(32) | _RF_RS(0), /* OLO10 */ 161 _RF_S|_RF_A| _RF_SZ(32) | _RF_RS(42), /* HH22 */ 162 _RF_S|_RF_A| _RF_SZ(32) | _RF_RS(32), /* HM10 */ 163 _RF_S|_RF_A| _RF_SZ(32) | _RF_RS(10), /* LM22 */ 164 _RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(42), /* PC_HH22 */ 165 _RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(32), /* PC_HM10 */ 166 _RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(10), /* PC_LM22 */ 167 _RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(2), /* WDISP16 */ 168 _RF_S|_RF_A|_RF_P| _RF_SZ(32) | _RF_RS(2), /* WDISP19 */ 169 _RF_S|_RF_A| _RF_SZ(32) | _RF_RS(0), /* GLOB_JMP */ 170 _RF_S|_RF_A| _RF_SZ(32) | _RF_RS(0), /* 7 */ 171 _RF_S|_RF_A| _RF_SZ(32) | _RF_RS(0), /* 5 */ 172 _RF_S|_RF_A| _RF_SZ(32) | _RF_RS(0), /* 6 */ 173 _RF_S|_RF_A|_RF_P| _RF_SZ(64) | _RF_RS(0), /* DISP64 */ 174 _RF_A| _RF_SZ(64) | _RF_RS(0), /* PLT64 */ 175 _RF_S|_RF_A| _RF_SZ(32) | _RF_RS(10), /* HIX22 */ 176 _RF_S|_RF_A| _RF_SZ(32) | _RF_RS(0), /* LOX10 */ 177 _RF_S|_RF_A| _RF_SZ(32) | _RF_RS(22), /* H44 */ 178 _RF_S|_RF_A| _RF_SZ(32) | _RF_RS(12), /* M44 */ 179 _RF_S|_RF_A| _RF_SZ(32) | _RF_RS(0), /* L44 */ 180 _RF_S|_RF_A| _RF_SZ(64) | _RF_RS(0), /* REGISTER */ 181 _RF_S|_RF_A| _RF_U| _RF_SZ(64) | _RF_RS(0), /* UA64 */ 182 _RF_S|_RF_A| _RF_U| _RF_SZ(16) | _RF_RS(0), /* UA16 */ 183 }; 184 185 #if 0 186 static const char *reloc_names[] = { 187 "NONE", "RELOC_8", "RELOC_16", "RELOC_32", "DISP_8", 188 "DISP_16", "DISP_32", "WDISP_30", "WDISP_22", "HI22", 189 "22", "13", "LO10", "GOT10", "GOT13", 190 "GOT22", "PC10", "PC22", "WPLT30", "COPY", 191 "GLOB_DAT", "JMP_SLOT", "RELATIVE", "UA_32", "PLT32", 192 "HIPLT22", "LOPLT10", "LOPLT10", "PCPLT22", "PCPLT32", 193 "10", "11", "64", "OLO10", "HH22", 194 "HM10", "LM22", "PC_HH22", "PC_HM10", "PC_LM22", 195 "WDISP16", "WDISP19", "GLOB_JMP", "7", "5", "6", 196 "DISP64", "PLT64", "HIX22", "LOX10", "H44", "M44", 197 "L44", "REGISTER", "UA64", "UA16" 198 }; 199 #endif 200 201 #define RELOC_RESOLVE_SYMBOL(t) ((reloc_target_flags[t] & _RF_S) != 0) 202 #define RELOC_PC_RELATIVE(t) ((reloc_target_flags[t] & _RF_P) != 0) 203 #define RELOC_BASE_RELATIVE(t) ((reloc_target_flags[t] & _RF_B) != 0) 204 #define RELOC_UNALIGNED(t) ((reloc_target_flags[t] & _RF_U) != 0) 205 #define RELOC_USE_ADDEND(t) ((reloc_target_flags[t] & _RF_A) != 0) 206 #define RELOC_TARGET_SIZE(t) ((reloc_target_flags[t] >> 8) & 0xff) 207 #define RELOC_VALUE_RIGHTSHIFT(t) (reloc_target_flags[t] & 0xff) 208 209 static long reloc_target_bitmask[] = { 210 #define _BM(x) (~(-(1ULL << (x)))) 211 0, /* NONE */ 212 _BM(8), _BM(16), _BM(32), /* RELOC_8, _16, _32 */ 213 _BM(8), _BM(16), _BM(32), /* DISP8, DISP16, DISP32 */ 214 _BM(30), _BM(22), /* WDISP30, WDISP22 */ 215 _BM(22), _BM(22), /* HI22, _22 */ 216 _BM(13), _BM(10), /* RELOC_13, _LO10 */ 217 _BM(10), _BM(13), _BM(22), /* GOT10, GOT13, GOT22 */ 218 _BM(10), _BM(22), /* _PC10, _PC22 */ 219 _BM(30), 0, /* _WPLT30, _COPY */ 220 _BM(32), _BM(32), _BM(32), /* _GLOB_DAT, JMP_SLOT, _RELATIVE */ 221 _BM(32), _BM(32), /* _UA32, PLT32 */ 222 _BM(22), _BM(10), /* _HIPLT22, LOPLT10 */ 223 _BM(32), _BM(22), _BM(10), /* _PCPLT32, _PCPLT22, _PCPLT10 */ 224 _BM(10), _BM(11), -1, /* _10, _11, _64 */ 225 _BM(10), _BM(22), /* _OLO10, _HH22 */ 226 _BM(10), _BM(22), /* _HM10, _LM22 */ 227 _BM(22), _BM(10), _BM(22), /* _PC_HH22, _PC_HM10, _PC_LM22 */ 228 _BM(16), _BM(19), /* _WDISP16, _WDISP19 */ 229 -1, /* GLOB_JMP */ 230 _BM(7), _BM(5), _BM(6) /* _7, _5, _6 */ 231 -1, -1, /* DISP64, PLT64 */ 232 _BM(22), _BM(13), /* HIX22, LOX10 */ 233 _BM(22), _BM(10), _BM(13), /* H44, M44, L44 */ 234 -1, -1, _BM(16), /* REGISTER, UA64, UA16 */ 235 #undef _BM 236 }; 237 #define RELOC_VALUE_BITMASK(t) (reloc_target_bitmask[t]) 238 239 int 240 elf_reloc_local(linker_file_t lf, const void *data, int type) 241 { 242 const Elf_Rela *rela; 243 Elf_Addr value; 244 Elf_Addr *where; 245 246 if (type != ELF_RELOC_RELA) 247 return (-1); 248 249 rela = (const Elf_Rela *)data; 250 if (ELF_R_TYPE(rela->r_info) != R_SPARC_RELATIVE) 251 return (-1); 252 253 value = rela->r_addend + (Elf_Addr)lf->address; 254 where = (Elf_Addr *)((Elf_Addr)lf->address + rela->r_offset); 255 256 *where = value; 257 258 return (0); 259 } 260 261 /* Process one elf relocation with addend. */ 262 int 263 elf_reloc(linker_file_t lf, const void *data, int type) 264 { 265 const Elf_Rela *rela; 266 Elf_Addr relocbase; 267 Elf_Half *where32; 268 Elf_Addr *where; 269 Elf_Word rtype, symidx; 270 Elf_Addr value; 271 Elf_Addr mask; 272 Elf_Addr addr; 273 274 if (type != ELF_RELOC_RELA) 275 return (-1); 276 277 relocbase = (Elf_Addr)lf->address; 278 rela = (const Elf_Rela *)data; 279 where = (Elf_Addr *)(relocbase + rela->r_offset); 280 where32 = (Elf_Half *)where; 281 rtype = ELF_R_TYPE(rela->r_info); 282 symidx = ELF_R_SYM(rela->r_info); 283 284 if (rtype == R_SPARC_NONE || rtype == R_SPARC_RELATIVE) 285 return (0); 286 287 if (rtype == R_SPARC_JMP_SLOT || rtype == R_SPARC_COPY || 288 rtype > R_SPARC_UA16) 289 return (-1); 290 291 if (RELOC_UNALIGNED(rtype)) 292 return (-1); 293 294 value = rela->r_addend; 295 296 if (RELOC_RESOLVE_SYMBOL(rtype)) { 297 addr = elf_lookup(lf, symidx, 1); 298 if (addr == 0) 299 return (-1); 300 value += addr; 301 } 302 303 if (RELOC_PC_RELATIVE(rtype)) 304 value -= (Elf_Addr)where; 305 306 if (RELOC_BASE_RELATIVE(rtype)) 307 value += relocbase; 308 309 mask = RELOC_VALUE_BITMASK(rtype); 310 value >>= RELOC_VALUE_RIGHTSHIFT(rtype); 311 value &= mask; 312 313 if (RELOC_TARGET_SIZE(rtype) > 32) { 314 *where &= ~mask; 315 *where |= value; 316 } else { 317 *where32 &= ~mask; 318 *where32 |= value; 319 } 320 321 return (0); 322 } 323 324 int 325 elf_cpu_load_file(linker_file_t lf __unused) 326 { 327 328 return (0); 329 } 330 331 int 332 elf_cpu_unload_file(linker_file_t lf __unused) 333 { 334 335 return (0); 336 }
Cache object: 7b841c31792122f734b76a26e977c611
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