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 (c) 1988 AT&T 24 * All Rights Reserved 25 * 26 * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 27 * Use is subject to license terms. 28 */ 29 #ifndef __ELF_DOT_H 30 #define __ELF_DOT_H 31 32 #include <sys/types.h> 33 #include <sys/mman.h> 34 #include <elf.h> 35 #include <_rtld.h> 36 37 #ifdef __cplusplus 38 extern "C" { 39 #endif 40 41 /* 42 * Common extern functions for ELF file class. 43 */ 44 extern int elf_config(Rt_map *, int); 45 extern Rtc_obj *elf_config_ent(const char *, Word, int, const char **); 46 extern void elf_config_flt(Lm_list *, const char *, const char *, 47 Alist **, Aliste); 48 #if defined(__i386) 49 extern int elf_copy_gen(Rt_map *); 50 #endif 51 extern int elf_copy_reloc(char *, Sym *, Rt_map *, void *, Sym *, 52 Rt_map *, const void *); 53 extern Sym *elf_find_sym(Slookup *, Rt_map **, uint_t *, int *); 54 extern Sym *elf_lazy_find_sym(Slookup *, Rt_map **, uint_t *, int *); 55 extern Rt_map *elf_lazy_load(Rt_map *, Slookup *, uint_t, const char *, 56 uint_t, Grp_hdl **, int *); 57 extern Sym *elf_lookup_filtee(Slookup *, Rt_map **, uint_t *, uint_t, 58 int *); 59 extern int elf_mach_flags_check(Rej_desc *, Ehdr *); 60 extern Rt_map *elf_new_lmp(Lm_list *, Aliste, Fdesc *, Addr, size_t, void *, 61 int *); 62 extern Rt_map *elf_obj_file(Lm_list *, Aliste, const char *, 63 mmapobj_result_t *, mmapobj_result_t *, uint_t); 64 extern Rt_map *elf_obj_fini(Lm_list *, Rt_map *, int *); 65 extern void elf_plt_init(void *, caddr_t); 66 #if defined(__sparcv9) 67 extern void elf_plt2_init(uint_t *, Rt_map *); 68 #endif 69 extern int elf_reloc(Rt_map *, uint_t, int *, APlist **); 70 extern void elf_reloc_bad(Rt_map *, void *, uchar_t, ulong_t, 71 ulong_t); 72 extern int elf_reloc_error(Rt_map *, const char *, void *, uint_t); 73 extern ulong_t elf_reloc_relative(ulong_t, ulong_t, ulong_t, ulong_t, 74 Rt_map *, APlist **); 75 extern ulong_t elf_reloc_relative_count(ulong_t, ulong_t, ulong_t, ulong_t, 76 Rt_map *, APlist **); 77 extern int elf_rtld_load(); 78 extern long elf_static_tls(Rt_map *, Sym *, void *, uchar_t, char *, 79 ulong_t, long); 80 extern Fct *elf_verify(caddr_t, size_t, Fdesc *, const char *, Rej_desc *); 81 extern int elf_verify_vers(const char *, Rt_map *, Rt_map *); 82 83 /* 84 * Padinfo 85 * 86 * Used to track the which PLTpadd entries have been used and 87 * to where they are bound. 88 * 89 * NOTE: these are only currently used for SparcV9 90 */ 91 typedef struct pltpadinfo { 92 Addr pp_addr; 93 void *pp_plt; 94 } Pltpadinfo; 95 96 /* 97 * Private data for an ELF file class. 98 */ 99 typedef struct _rt_elf_private { 100 void *e_symtab; /* symbol table */ 101 void *e_sunwsymtab; /* symtab augmented with local fcns */ 102 uint_t *e_hash; /* hash table */ 103 char *e_strtab; /* string table */ 104 void *e_reloc; /* relocation table */ 105 uint_t *e_pltgot; /* addrs for procedure linkage table */ 106 void *e_jmprel; /* plt relocations */ 107 ulong_t e_sunwsortent; /* size of sunw[sym|tls]sort entry */ 108 uint_t *e_sunwsymsort; /* sunwsymtab indices sorted by addr */ 109 ulong_t e_sunwsymsortsz; /* size of sunwsymtab */ 110 ulong_t e_sunwsymsz; /* size of e_sunwsymtab */ 111 ulong_t e_pltrelsize; /* size of PLT relocation entries */ 112 ulong_t e_relsz; /* size of relocs */ 113 ulong_t e_relent; /* size of base reloc entry */ 114 ulong_t e_movesz; /* size of movetabs */ 115 ulong_t e_moveent; /* size of base movetab entry */ 116 ulong_t e_tlsstatoff; /* TLS offset into static block */ 117 void *e_movetab; /* movetable address */ 118 Phdr *e_pttls; /* PT_TLS */ 119 Phdr *e_ptunwind; /* PT_SUNW_UNWIND (amd64 specific) */ 120 ulong_t e_syment; /* size of symtab entry */ 121 Verneed *e_verneed; /* versions needed by this image and */ 122 int e_verneednum; /* their associated count */ 123 Verdef *e_verdef; /* versions defined by this image and */ 124 int e_verdefnum; /* their associated count */ 125 Versym *e_versym; /* Per-symbol versions */ 126 ulong_t e_syminent; /* syminfo entry size */ 127 void *e_pltpad; /* PLTpad table */ 128 void *e_pltpadend; /* end of PLTpad table */ 129 } Rt_elfp; 130 131 /* 132 * Macros for getting to linker ELF private data. 133 */ 134 #define ELFPRV(X) ((X)->rt_priv) 135 #define SYMTAB(X) (((Rt_elfp *)(X)->rt_priv)->e_symtab) 136 #define SUNWSYMTAB(X) (((Rt_elfp *)(X)->rt_priv)->e_sunwsymtab) 137 #define HASH(X) (((Rt_elfp *)(X)->rt_priv)->e_hash) 138 #define STRTAB(X) (((Rt_elfp *)(X)->rt_priv)->e_strtab) 139 #define REL(X) (((Rt_elfp *)(X)->rt_priv)->e_reloc) 140 #define PLTGOT(X) (((Rt_elfp *)(X)->rt_priv)->e_pltgot) 141 #define MOVESZ(X) (((Rt_elfp *)(X)->rt_priv)->e_movesz) 142 #define MOVEENT(X) (((Rt_elfp *)(X)->rt_priv)->e_moveent) 143 #define MOVETAB(X) (((Rt_elfp *)(X)->rt_priv)->e_movetab) 144 #define JMPREL(X) (((Rt_elfp *)(X)->rt_priv)->e_jmprel) 145 #define SUNWSYMSZ(X) (((Rt_elfp *)(X)->rt_priv)->e_sunwsymsz) 146 #define PTTLS(X) (((Rt_elfp *)(X)->rt_priv)->e_pttls) 147 #define PTUNWIND(X) (((Rt_elfp *)(X)->rt_priv)->e_ptunwind) 148 #define TLSSTATOFF(X) (((Rt_elfp *)(X)->rt_priv)->e_tlsstatoff) 149 #define PLTRELSZ(X) (((Rt_elfp *)(X)->rt_priv)->e_pltrelsize) 150 #define RELSZ(X) (((Rt_elfp *)(X)->rt_priv)->e_relsz) 151 #define RELENT(X) (((Rt_elfp *)(X)->rt_priv)->e_relent) 152 #define SYMENT(X) (((Rt_elfp *)(X)->rt_priv)->e_syment) 153 #define VERNEED(X) (((Rt_elfp *)(X)->rt_priv)->e_verneed) 154 #define VERNEEDNUM(X) (((Rt_elfp *)(X)->rt_priv)->e_verneednum) 155 #define VERDEF(X) (((Rt_elfp *)(X)->rt_priv)->e_verdef) 156 #define VERDEFNUM(X) (((Rt_elfp *)(X)->rt_priv)->e_verdefnum) 157 #define VERSYM(X) (((Rt_elfp *)(X)->rt_priv)->e_versym) 158 #define SYMINENT(X) (((Rt_elfp *)(X)->rt_priv)->e_syminent) 159 #define PLTPAD(X) (((Rt_elfp *)(X)->rt_priv)->e_pltpad) 160 #define PLTPADEND(X) (((Rt_elfp *)(X)->rt_priv)->e_pltpadend) 161 #define SUNWSORTENT(X) (((Rt_elfp *)(X)->rt_priv)->e_sunwsortent) 162 #define SUNWSYMSORT(X) (((Rt_elfp *)(X)->rt_priv)->e_sunwsymsort) 163 #define SUNWSYMSORTSZ(X) (((Rt_elfp *)(X)->rt_priv)->e_sunwsymsortsz) 164 165 /* 166 * Most of the above macros are used from ELF specific routines, however there 167 * are a couple of instances where we need to ensure the file being processed 168 * is ELF before dereferencing the macro. 169 */ 170 #define THIS_IS_ELF(X) (FCT(X) == &elf_fct) 171 #define THIS_IS_NOT_ELF(X) (FCT(X) != &elf_fct) 172 173 #ifdef __cplusplus 174 } 175 #endif 176 177 #endif /* __ELF_DOT_H */ 178