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 * Copyright (c) 1989, 2010, Oracle and/or its affiliates. All rights reserved. 23 */ 24 25 #ifndef _LINK_H 26 #define _LINK_H 27 28 #include <sys/link.h> 29 30 #ifndef _ASM 31 #include <elf.h> 32 #include <sys/types.h> 33 #include <dlfcn.h> 34 #endif 35 36 #ifdef __cplusplus 37 extern "C" { 38 #endif 39 40 #ifndef _ASM 41 /* 42 * ld support library calls. 43 * 44 * These cannot be used in a 32bit large file capable environment because 45 * libelf is not large-file safe. Only define these interfaces if we are not 46 * 32bit, or not in the large file environment. 47 */ 48 #if !defined(_ILP32) || _FILE_OFFSET_BITS != 64 49 #ifdef __STDC__ 50 #include <libelf.h> 51 extern uint_t ld_version(uint_t); 52 extern void ld_input_done(uint_t *); 53 54 extern void ld_start(const char *, const Elf32_Half, const char *); 55 extern void ld_atexit(int); 56 extern void ld_open(const char **, const char **, int *, int, Elf **, 57 Elf *, size_t, const Elf_Kind); 58 extern void ld_file(const char *, const Elf_Kind, int, Elf *); 59 extern void ld_input_section(const char *, Elf32_Shdr **, Elf32_Word, 60 Elf_Data *, Elf *, uint_t *); 61 extern void ld_section(const char *, Elf32_Shdr *, Elf32_Word, 62 Elf_Data *, Elf *); 63 64 #if defined(_LP64) || defined(_LONGLONG_TYPE) 65 extern void ld_start64(const char *, const Elf64_Half, const char *); 66 extern void ld_atexit64(int); 67 extern void ld_open64(const char **, const char **, int *, int, Elf **, 68 Elf *, size_t, const Elf_Kind); 69 extern void ld_file64(const char *, const Elf_Kind, int, Elf *); 70 extern void ld_input_section64(const char *, Elf64_Shdr **, Elf64_Word, 71 Elf_Data *, Elf *, uint_t *); 72 extern void ld_section64(const char *, Elf64_Shdr *, Elf64_Word, 73 Elf_Data *, Elf *); 74 75 #endif /* (defined(_LP64) || defined(_LONGLONG_TYPE) */ 76 #else 77 extern void ld_version(); 78 extern void ld_input_done(); 79 80 extern void ld_start(); 81 extern void ld_atexit(); 82 extern void ld_open(); 83 extern void ld_file(); 84 extern void ld_input_section(); 85 extern void ld_section(); 86 87 #if defined(_LP64) || defined(_LONGLONG_TYPE) 88 extern void ld_start64(); 89 extern void ld_atexit64(); 90 extern void ld_open64(); 91 extern void ld_file64(); 92 extern void ld_input_section64(); 93 extern void ld_section64(); 94 95 #endif /* (defined(_LP64) || defined(_LONGLONG_TYPE) */ 96 #endif /* __STDC__ */ 97 #endif /* !defined(_ILP32) || _FILE_OFFSET_BITS != 64 */ 98 99 /* 100 * ld_version() version values. 101 */ 102 #define LD_SUP_VNONE 0 103 #define LD_SUP_VERSION1 1 104 #define LD_SUP_VERSION2 2 105 #define LD_SUP_VERSION3 3 106 #define LD_SUP_VCURRENT LD_SUP_VERSION3 107 108 /* 109 * Flags passed to ld support calls. 110 */ 111 #define LD_SUP_DERIVED 0x1 /* derived filename */ 112 #define LD_SUP_INHERITED 0x2 /* file inherited from .so DT_NEEDED */ 113 #define LD_SUP_EXTRACTED 0x4 /* file extracted from archive */ 114 #endif 115 116 /* 117 * Runtime link-map identifiers. 118 */ 119 #define LM_ID_BASE 0x00 120 #define LM_ID_LDSO 0x01 121 #define LM_ID_NUM 2 122 123 #define LM_ID_BRAND 0xfd /* brand emulation linkmap objs */ 124 #define LM_ID_NONE 0xfe /* no link map specified */ 125 #define LM_ID_NEWLM 0xff /* create a new link-map */ 126 127 /* 128 * Runtime Link-Edit Auditing. 129 */ 130 #define LAV_NONE 0 131 #define LAV_VERSION1 1 132 #define LAV_VERSION2 2 133 #define LAV_VERSION3 3 134 #define LAV_VERSION4 4 135 #define LAV_VERSION5 5 136 #define LAV_CURRENT LAV_VERSION5 137 #define LAV_NUM 6 138 139 /* 140 * Flags that can be or'd into the la_objopen() return code 141 */ 142 #define LA_FLG_BINDTO 0x0001 /* audit symbinds TO this object */ 143 #define LA_FLG_BINDFROM 0x0002 /* audit symbinding FROM this object */ 144 145 /* 146 * Flags that can be or'd into the 'flags' argument of la_symbind() 147 */ 148 #define LA_SYMB_NOPLTENTER 0x0001 /* disable pltenter for this symbol */ 149 #define LA_SYMB_NOPLTEXIT 0x0002 /* disable pltexit for this symbol */ 150 #define LA_SYMB_STRUCTCALL 0x0004 /* this function call passes a */ 151 /* structure as it's return code */ 152 #define LA_SYMB_DLSYM 0x0008 /* this symbol bindings is due to */ 153 /* a call to dlsym() */ 154 #define LA_SYMB_ALTVALUE 0x0010 /* alternate symbol binding returned */ 155 /* by la_symbind() */ 156 157 /* 158 * Flags that describe the object passed to la_objsearch() 159 */ 160 #define LA_SER_ORIG 0x001 /* original (needed) name */ 161 #define LA_SER_LIBPATH 0x002 /* LD_LIBRARY_PATH entry prepended */ 162 #define LA_SER_RUNPATH 0x004 /* runpath entry prepended */ 163 #define LA_SER_CONFIG 0x008 /* configuration entry prepended */ 164 #define LA_SER_DEFAULT 0x040 /* default path prepended */ 165 #define LA_SER_SECURE 0x080 /* default (secure) path prepended */ 166 167 #define LA_SER_MASK 0xfff /* mask of known flags */ 168 169 /* 170 * Flags that describe the la_activity() 171 */ 172 #define LA_ACT_CONSISTENT 0x00 /* add/deletion of objects complete */ 173 #define LA_ACT_ADD 0x01 /* objects being added */ 174 #define LA_ACT_DELETE 0x02 /* objects being deleted */ 175 #define LA_ACT_MAX 3 176 177 178 #ifndef _KERNEL 179 #ifndef _ASM 180 181 #if defined(_LP64) 182 typedef long lagreg_t; 183 #else 184 typedef int lagreg_t; 185 #endif 186 187 struct _la_sparc_regs { 188 lagreg_t lr_rego0; 189 lagreg_t lr_rego1; 190 lagreg_t lr_rego2; 191 lagreg_t lr_rego3; 192 lagreg_t lr_rego4; 193 lagreg_t lr_rego5; 194 lagreg_t lr_rego6; 195 lagreg_t lr_rego7; 196 }; 197 198 #if defined(_LP64) 199 typedef struct _la_sparc_regs La_sparcv9_regs; 200 typedef struct { 201 lagreg_t lr_rsp; 202 lagreg_t lr_rbp; 203 lagreg_t lr_rdi; /* arg1 */ 204 lagreg_t lr_rsi; /* arg2 */ 205 lagreg_t lr_rdx; /* arg3 */ 206 lagreg_t lr_rcx; /* arg4 */ 207 lagreg_t lr_r8; /* arg5 */ 208 lagreg_t lr_r9; /* arg6 */ 209 } La_amd64_regs; 210 #else 211 typedef struct _la_sparc_regs La_sparcv8_regs; 212 typedef struct { 213 lagreg_t lr_esp; 214 lagreg_t lr_ebp; 215 } La_i86_regs; 216 #endif 217 218 #if !defined(_SYS_INT_TYPES_H) 219 #if defined(_LP64) || defined(_I32LPx) 220 typedef unsigned long uintptr_t; 221 #else 222 typedef unsigned int uintptr_t; 223 #endif 224 #endif 225 226 227 #ifdef __STDC__ 228 extern uint_t la_version(uint_t); 229 extern void la_activity(uintptr_t *, uint_t); 230 extern void la_preinit(uintptr_t *); 231 extern char *la_objsearch(const char *, uintptr_t *, uint_t); 232 extern uint_t la_objopen(Link_map *, Lmid_t, uintptr_t *); 233 extern uint_t la_objclose(uintptr_t *); 234 extern int la_objfilter(uintptr_t *, const char *, uintptr_t *, 235 uint_t); 236 #if defined(_LP64) 237 extern uintptr_t la_amd64_pltenter(Elf64_Sym *, uint_t, uintptr_t *, 238 uintptr_t *, La_amd64_regs *, uint_t *, 239 const char *); 240 extern uintptr_t la_symbind64(Elf64_Sym *, uint_t, uintptr_t *, 241 uintptr_t *, uint_t *, const char *); 242 extern uintptr_t la_sparcv9_pltenter(Elf64_Sym *, uint_t, uintptr_t *, 243 uintptr_t *, La_sparcv9_regs *, uint_t *, 244 const char *); 245 extern uintptr_t la_pltexit64(Elf64_Sym *, uint_t, uintptr_t *, 246 uintptr_t *, uintptr_t, const char *); 247 #else /* !defined(_LP64) */ 248 extern uintptr_t la_symbind32(Elf32_Sym *, uint_t, uintptr_t *, 249 uintptr_t *, uint_t *); 250 extern uintptr_t la_sparcv8_pltenter(Elf32_Sym *, uint_t, uintptr_t *, 251 uintptr_t *, La_sparcv8_regs *, uint_t *); 252 extern uintptr_t la_i86_pltenter(Elf32_Sym *, uint_t, uintptr_t *, 253 uintptr_t *, La_i86_regs *, uint_t *); 254 extern uintptr_t la_pltexit(Elf32_Sym *, uint_t, uintptr_t *, 255 uintptr_t *, uintptr_t); 256 #endif /* _LP64 */ 257 #else /* __STDC__ */ 258 extern uint_t la_version(); 259 extern void la_preinit(); 260 extern uint_t la_objopen(); 261 extern uint_t la_objclose(); 262 extern int la_objfilter(); 263 #if defined(_LP64) 264 extern uintptr_t la_sparcv9_pltenter(); 265 extern uintptr_t la_pltexit64(); 266 extern uintptr_t la_symbind64(); 267 #else /* _ILP32 */ 268 extern uintptr_t la_sparcv8_pltenter(); 269 extern uintptr_t la_i86_pltenter(); 270 extern uintptr_t la_pltexit(); 271 extern uintptr_t la_symbind32(); 272 #endif /* _LP64 */ 273 #endif /* __STDC__ */ 274 275 #ifdef __STDC__ 276 /* 277 * The ElfW() macro is a GNU/Linux feature, provided as support for 278 * the dl_phdr_info structure used by dl_phdr_iterate(), which also 279 * originated under Linux. Given an ELF data type, without the ElfXX_ 280 * prefix, it supplies the appropriate prefix (Elf32_ or Elf64_) for 281 * the ELFCLASS of the code being compiled. 282 * 283 * Note that ElfW() is not suitable in situations in which the ELFCLASS 284 * of the code being compiled does not match that of the objects that 285 * code is intended to operate on (e.g. a 32-bit link-editor building 286 * a 64-bit object). The macros defined in <sys/machelf.h> are 287 * recommended in such cases. 288 */ 289 #ifdef _LP64 290 #define ElfW(type) Elf64_ ## type 291 #else 292 #define ElfW(type) Elf32_ ## type 293 #endif 294 295 /* 296 * The callback function to dl_interate_phdr() receives a pointer 297 * to a structure of this type. 298 * 299 * dlpi_addr is defined such that the address of any segment in 300 * the program header array can be calculated as: 301 * 302 * addr == info->dlpi_addr + info->dlpi_phdr[x].p_vaddr; 303 * 304 * It is therefore 0 for ET_EXEC objects, and the base address at 305 * which the object is mapped otherwise. 306 */ 307 struct dl_phdr_info { 308 ElfW(Addr) dlpi_addr; /* Base address of object */ 309 const char *dlpi_name; /* Null-terminated obj name */ 310 const ElfW(Phdr) *dlpi_phdr; /* Ptr to ELF program hdr arr */ 311 ElfW(Half) dlpi_phnum; /* # of items in dlpi_phdr[] */ 312 313 /* 314 * Note: Following members were introduced after the first version 315 * of this structure was available. The dl_iterate_phdr() callback 316 * function is passed a 'size' argument giving the size of the info 317 * structure, and must compare that size to the offset of these fields 318 * before accessing them to ensure that they are present. 319 */ 320 321 /* Incremented when a new object is mapped into the process */ 322 u_longlong_t dlpi_adds; 323 /* Incremented when an object is unmapped from the process */ 324 u_longlong_t dlpi_subs; 325 }; 326 327 extern int dl_iterate_phdr(int (*)(struct dl_phdr_info *, size_t, void *), 328 void *); 329 #endif /* __STDC__ */ 330 331 #endif /* _ASM */ 332 #endif /* _KERNEL */ 333 334 335 #ifdef __cplusplus 336 } 337 #endif 338 339 #endif /* _LINK_H */ 340